/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ // vim:cindent:ts=2:et:sw=2: /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Dan Rosen * Mats Palmgren * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* * construction of a frame tree that is nearly isomorphic to the content * tree and updating of that tree in response to dynamic changes */ #include "nsCSSFrameConstructor.h" #include "nsCRT.h" #include "nsIAtom.h" #include "nsIURL.h" #include "nsISupportsArray.h" #include "nsHashtable.h" #include "nsIHTMLDocument.h" #include "nsIStyleRule.h" #include "nsIFrame.h" #include "nsGkAtoms.h" #include "nsPresContext.h" #include "nsILinkHandler.h" #include "nsIDocument.h" #include "nsTableFrame.h" #include "nsTableColGroupFrame.h" #include "nsTableColFrame.h" #include "nsIDOMHTMLDocument.h" #include "nsIDOMHTMLTableColElement.h" #include "nsIDOMHTMLTableCaptionElem.h" #include "nsHTMLParts.h" #include "nsIPresShell.h" #include "nsStyleSet.h" #include "nsIViewManager.h" #include "nsIEventStateManager.h" #include "nsIScrollableView.h" #include "nsStyleConsts.h" #include "nsTableOuterFrame.h" #include "nsIDOMXULElement.h" #include "nsHTMLContainerFrame.h" #include "nsINameSpaceManager.h" #include "nsIDOMHTMLSelectElement.h" #include "nsIDOMHTMLLegendElement.h" #include "nsIComboboxControlFrame.h" #include "nsIListControlFrame.h" #include "nsISelectControlFrame.h" #include "nsIRadioControlFrame.h" #include "nsICheckboxControlFrame.h" #include "nsIDOMCharacterData.h" #include "nsIDOMHTMLImageElement.h" #include "nsPlaceholderFrame.h" #include "nsTableRowGroupFrame.h" #include "nsStyleChangeList.h" #include "nsIFormControl.h" #include "nsCSSAnonBoxes.h" #include "nsCSSPseudoElements.h" #include "nsIDeviceContext.h" #include "nsTextFragment.h" #include "nsISupportsArray.h" #include "nsIAnonymousContentCreator.h" #include "nsFrameManager.h" #include "nsLegendFrame.h" #include "nsIContentIterator.h" #include "nsBoxLayoutState.h" #include "nsBindingManager.h" #include "nsXBLBinding.h" #include "nsITheme.h" #include "nsContentCID.h" #include "nsContentUtils.h" #include "nsIScriptError.h" #include "nsIDocShell.h" #include "nsIDocShellTreeItem.h" #include "nsObjectFrame.h" #include "nsRuleNode.h" #include "nsIDOMMutationEvent.h" #include "nsChildIterator.h" #include "nsCSSRendering.h" #include "nsISelectElement.h" #include "nsLayoutErrors.h" #include "nsLayoutUtils.h" #include "nsAutoPtr.h" #include "nsBoxFrame.h" #include "nsIBoxLayout.h" #include "nsImageFrame.h" #include "nsIObjectLoadingContent.h" #include "nsContentErrors.h" #include "nsIPrincipal.h" #include "nsIDOMWindowInternal.h" #include "nsStyleUtil.h" #include "nsIFocusEventSuppressor.h" #include "nsBox.h" #include "nsTArray.h" #ifdef MOZ_XUL #include "nsIRootBox.h" #include "nsIDOMXULCommandDispatcher.h" #include "nsIDOMXULDocument.h" #include "nsIXULDocument.h" #endif #ifdef ACCESSIBILITY #include "nsIAccessibilityService.h" #include "nsIAccessibleEvent.h" #endif #include "nsInlineFrame.h" #include "nsBlockFrame.h" #include "nsIScrollableFrame.h" #include "nsIXBLService.h" #undef NOISY_FIRST_LETTER #ifdef MOZ_MATHML #include "nsMathMLParts.h" #endif #ifdef MOZ_SVG #include "nsSVGEffects.h" #include "nsSVGUtils.h" #include "nsSVGOuterSVGFrame.h" #endif nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #if defined(MOZ_MEDIA) nsIFrame* NS_NewHTMLVideoFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #endif #ifdef MOZ_SVG #include "nsISVGTextContentMetrics.h" PRBool NS_SVGEnabled(); nsIFrame* NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGPathGeometryFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGGenericContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGGlyphFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGTSpanFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); PRBool NS_SVG_PassesConditionalProcessingTests(nsIContent *aContent); extern nsIFrame* NS_NewSVGLinearGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGRadialGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGStopFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGImageFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGTextPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFilterFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGPatternFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGLeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); #endif #include "nsIDocument.h" #include "nsIDOMElement.h" #include "nsIDOMNodeList.h" #include "nsIDOMDocument.h" #include "nsIDOMDocumentXBL.h" #include "nsIScrollable.h" #include "nsINodeInfo.h" #include "prenv.h" #include "nsWidgetsCID.h" #include "nsNodeInfoManager.h" #include "nsContentCreatorFunctions.h" #include "nsIServiceManager.h" // Global object maintenance nsIXBLService * nsCSSFrameConstructor::gXBLService = nsnull; #ifdef DEBUG // Set the environment variable GECKO_FRAMECTOR_DEBUG_FLAGS to one or // more of the following flags (comma separated) for handy debug // output. static PRBool gNoisyContentUpdates = PR_FALSE; static PRBool gReallyNoisyContentUpdates = PR_FALSE; static PRBool gNoisyInlineConstruction = PR_FALSE; static PRBool gVerifyFastFindFrame = PR_FALSE; struct FrameCtorDebugFlags { const char* name; PRBool* on; }; static FrameCtorDebugFlags gFlags[] = { { "content-updates", &gNoisyContentUpdates }, { "really-noisy-content-updates", &gReallyNoisyContentUpdates }, { "noisy-inline", &gNoisyInlineConstruction }, { "fast-find-frame", &gVerifyFastFindFrame } }; #define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0])) #endif #ifdef MOZ_XUL #include "nsMenuFrame.h" #include "nsPopupSetFrame.h" #include "nsTreeColFrame.h" #include "nsIBoxObject.h" #include "nsPIListBoxObject.h" #include "nsListBoxBodyFrame.h" #include "nsListItemFrame.h" #include "nsXULLabelFrame.h" //------------------------------------------------------------------ nsIFrame* NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewRootBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewThumbFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewDeckFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewStackFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewImageBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTextBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewGroupBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewButtonBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSplitterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuPopupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewPopupSetFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aFlags); nsIFrame* NS_NewMenuBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTreeBodyFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); // grid nsresult NS_NewGridLayout2 ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout ); nsIFrame* NS_NewGridRowLeafFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewGridRowGroupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); // end grid nsIFrame* NS_NewTitleBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewResizerFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #endif nsIFrame* NS_NewHTMLScrollFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot); nsIFrame* NS_NewXULScrollFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot); nsIFrame* NS_NewSliderFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarButtonFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #ifdef NOISY_FINDFRAME static PRInt32 FFWC_totalCount=0; static PRInt32 FFWC_doLoop=0; static PRInt32 FFWC_doSibling=0; static PRInt32 FFWC_recursions=0; static PRInt32 FFWC_nextInFlows=0; #endif static nsresult DeletingFrameSubtree(nsFrameManager* aFrameManager, nsIFrame* aFrame); static inline nsIFrame* GetFieldSetBlockFrame(nsIFrame* aFieldsetFrame) { // Depends on the fieldset child frame order - see ConstructFieldSetFrame() below. nsIFrame* firstChild = aFieldsetFrame->GetFirstChild(nsnull); return firstChild && firstChild->GetNextSibling() ? firstChild->GetNextSibling() : firstChild; } //---------------------------------------------------------------------- static PRBool IsInlineOutside(nsIFrame* aFrame) { return aFrame->GetStyleDisplay()->IsInlineOutside(); } /** * True if aFrame is an actual inline frame in the sense of non-replaced * display:inline CSS boxes. In other words, it can be affected by {ib} * splitting and can contain first-letter frames. Basically, this is either an * inline frame (positioned or otherwise) or an line frame (this last because * it can contain first-letter and because inserting blocks in the middle of it * needs to terminate it). */ static PRBool IsInlineFrame(const nsIFrame* aFrame) { return aFrame->IsFrameOfType(nsIFrame::eLineParticipant); } /** * If any children require a block parent, return the first such child. * Otherwise return null. */ static nsIContent* AnyKidsNeedBlockParent(nsIFrame *aFrameList) { for (nsIFrame *k = aFrameList; k; k = k->GetNextSibling()) { // Line participants, such as text and inline frames, can't be // directly inside a XUL box; they must be wrapped in an // intermediate block. if (k->IsFrameOfType(nsIFrame::eLineParticipant)) { return k->GetContent(); } } return nsnull; } // Reparent a frame into a wrapper frame that is a child of its old parent. static void ReparentFrame(nsFrameManager* aFrameManager, nsIFrame* aNewParentFrame, nsIFrame* aFrame) { aFrame->SetParent(aNewParentFrame); aFrameManager->ReParentStyleContext(aFrame); if (aFrame->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) { // No need to walk up the tree, since the bits are already set // right on the parent of aNewParentFrame. NS_ASSERTION(aNewParentFrame->GetParent()->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW, "aNewParentFrame's parent should have this bit set!"); aNewParentFrame->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } } //---------------------------------------------------------------------- // // When inline frames get weird and have block frames in them, we // annotate them to help us respond to incremental content changes // more easily. static inline PRBool IsFrameSpecial(nsIFrame* aFrame) { return (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) != 0; } static nsIFrame* GetSpecialSibling(nsIFrame* aFrame) { // We only store the "special sibling" annotation with the first // frame in the continuation chain. Walk back to find that frame now. aFrame = aFrame->GetFirstContinuation(); void* value = aFrame->GetProperty(nsGkAtoms::IBSplitSpecialSibling); return static_cast(value); } static nsIFrame* GetIBSplitSpecialPrevSiblingForAnonymousBlock(nsIFrame* aFrame) { NS_PRECONDITION(IsFrameSpecial(aFrame) && !IsInlineFrame(aFrame), "Shouldn't call this"); // We only store the "special sibling" annotation with the first // frame in the continuation chain. Walk back to find that frame now. return static_cast (aFrame->GetFirstContinuation()-> GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling)); } static nsIFrame* GetLastSpecialSibling(nsIFrame* aFrame, PRBool aIgnoreEmpty) { for (nsIFrame *frame = aFrame, *next; ; frame = next) { next = GetSpecialSibling(frame); if (!next || (aIgnoreEmpty && !next->GetFirstChild(nsnull))) return frame; } NS_NOTREACHED("unreachable code"); return nsnull; } static void SetFrameIsSpecial(nsIFrame* aFrame, nsIFrame* aSpecialSibling) { NS_PRECONDITION(aFrame, "bad args!"); // Mark the frame and all of its siblings as "special". for (nsIFrame* frame = aFrame; frame != nsnull; frame = frame->GetNextContinuation()) { frame->AddStateBits(NS_FRAME_IS_SPECIAL); } if (aSpecialSibling) { // We should be the first-in-flow NS_ASSERTION(!aFrame->GetPrevInFlow(), "assigning special sibling to other than first-in-flow!"); // Store the "special sibling" (if we were given one) with the // first frame in the flow. aFrame->SetProperty(nsGkAtoms::IBSplitSpecialSibling, aSpecialSibling); } } static nsIFrame* GetIBContainingBlockFor(nsIFrame* aFrame) { NS_PRECONDITION(IsFrameSpecial(aFrame), "GetIBContainingBlockFor() should only be called on known IB frames"); // Get the first "normal" ancestor of the target frame. nsIFrame* parentFrame; do { parentFrame = aFrame->GetParent(); if (! parentFrame) { NS_ERROR("no unsplit block frame in IB hierarchy"); return aFrame; } // Note that we ignore non-special frames which have a pseudo on their // style context -- they're not the frames we're looking for! In // particular, they may be hiding a real parent that _is_ special. if (!IsFrameSpecial(parentFrame) && !parentFrame->GetStyleContext()->GetPseudoType()) break; aFrame = parentFrame; } while (1); // post-conditions NS_ASSERTION(parentFrame, "no normal ancestor found for special frame in GetIBContainingBlockFor"); NS_ASSERTION(parentFrame != aFrame, "parentFrame is actually the child frame - bogus reslt"); return parentFrame; } //---------------------------------------------------------------------- // Block/inline frame construction logic. We maintain a few invariants here: // // 1. Block frames contain block and inline frames. // // 2. Inline frames only contain inline frames. If an inline parent has a block // child then the block child is migrated upward until it lands in a block // parent (the inline frames containing block is where it will end up). static nsIFrame* FindFirstBlock(nsIFrame* aKid, nsIFrame** aPrevKid) { nsIFrame* prevKid = nsnull; while (aKid) { if (!IsInlineOutside(aKid)) { *aPrevKid = prevKid; return aKid; } prevKid = aKid; aKid = aKid->GetNextSibling(); } *aPrevKid = nsnull; return nsnull; } static nsIFrame* FindLastBlock(nsIFrame* aKid) { nsIFrame* lastBlock = nsnull; while (aKid) { if (!IsInlineOutside(aKid)) { lastBlock = aKid; } aKid = aKid->GetNextSibling(); } return lastBlock; } /* * The special-prev-sibling is useful for * finding the "special parent" of a frame (i.e., a frame from which a * good parent style context can be obtained), one looks at the * special previous sibling annotation of the real parent of the frame * (if the real parent has NS_FRAME_IS_SPECIAL). */ inline void MarkIBSpecialPrevSibling(nsIFrame *aAnonymousFrame, nsIFrame *aSpecialParent) { aAnonymousFrame->SetProperty(nsGkAtoms::IBSplitSpecialPrevSibling, aSpecialParent, nsnull, nsnull); } // ----------------------------------------------------------- static PRBool IsOutOfFlowList(nsIAtom* aListName) { return aListName == nsGkAtoms::floatList || aListName == nsGkAtoms::absoluteList || aListName == nsGkAtoms::overflowOutOfFlowList || aListName == nsGkAtoms::fixedList; } // Helper function that recursively removes content to frame mappings and // undisplayed content mappings. // This differs from DeletingFrameSubtree() because the frames have not yet been // added to the frame hierarchy. // XXXbz it would really help if we merged the two methods somehow... :( static void DoCleanupFrameReferences(nsFrameManager* aFrameManager, nsIFrame* aFrameIn) { nsIContent* content = aFrameIn->GetContent(); if (aFrameIn->GetType() == nsGkAtoms::placeholderFrame) { nsPlaceholderFrame* placeholder = static_cast (aFrameIn); // if the frame is a placeholder use the out of flow frame aFrameIn = nsPlaceholderFrame::GetRealFrameForPlaceholder(placeholder); // And don't forget to unregister the placeholder mapping. Note that this // means it's the caller's responsibility to actually destroy the // out-of-flow pointed to by the placeholder, since after this point the // out-of-flow is not reachable via the placeholder. aFrameManager->UnregisterPlaceholderFrame(placeholder); } // Remove the mapping from the content object to its frame aFrameManager->RemoveAsPrimaryFrame(content, aFrameIn); aFrameManager->ClearAllUndisplayedContentIn(content); // Recursively walk the child frames. nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { nsIFrame* childFrame = aFrameIn->GetFirstChild(childListName); while (childFrame) { DoCleanupFrameReferences(aFrameManager, childFrame); // Get the next sibling child frame childFrame = childFrame->GetNextSibling(); } childListName = aFrameIn->GetAdditionalChildListName(childListIndex++); } while (childListName); } // Helper function that walks a frame list and calls DoCleanupFrameReference() static void CleanupFrameReferences(nsFrameManager* aFrameManager, nsIFrame* aFrameList) { while (aFrameList) { DoCleanupFrameReferences(aFrameManager, aFrameList); // Get the sibling frame aFrameList = aFrameList->GetNextSibling(); } } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. struct nsFrameItems { nsIFrame* childList; nsIFrame* lastChild; nsFrameItems(nsIFrame* aFrame = nsnull); // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); // Inserts the frame somewhere in the list void InsertChildAfter(nsIFrame* aChild, nsIFrame* aAfter); // Remove the frame from the list, return PR_FALSE if not found. If // aPrevSibling is given, it must have aChild as its GetNextSibling(). // aPrevSibling may be null to indicate that the list should be searched. PRBool RemoveChild(nsIFrame* aChild, nsIFrame* aPrevSibling); }; nsFrameItems::nsFrameItems(nsIFrame* aFrame) : childList(aFrame), lastChild(aFrame) { } void nsFrameItems::AddChild(nsIFrame* aChild) { #ifdef DEBUG nsIFrame* oldLastChild = lastChild; #endif if (childList == nsnull) { childList = lastChild = aChild; } else { NS_ASSERTION(aChild != lastChild, "Same frame being added to frame list twice?"); lastChild->SetNextSibling(aChild); lastChild = aChild; } // if aChild has siblings, lastChild needs to be the last one for (nsIFrame* sib = lastChild->GetNextSibling(); sib; sib = sib->GetNextSibling()) { NS_ASSERTION(oldLastChild != sib, "Loop in frame list"); lastChild = sib; } } void nsFrameItems::InsertChildAfter(nsIFrame* aChild, nsIFrame* aAfter) { if (!childList || (aAfter && !aAfter->GetNextSibling())) { // Appending to the end of the list AddChild(aChild); return; } if (!aAfter) { // Inserting at beginning of list aChild->SetNextSibling(childList); childList = aChild; return; } aChild->SetNextSibling(aAfter->GetNextSibling()); aAfter->SetNextSibling(aChild); } PRBool nsFrameItems::RemoveChild(nsIFrame* aFrame, nsIFrame* aPrevSibling) { NS_PRECONDITION(aFrame, "null ptr"); nsIFrame* prev; if (aPrevSibling) { prev = aPrevSibling; } else { prev = nsnull; nsIFrame* sib; for (sib = childList; sib && sib != aFrame; sib = sib->GetNextSibling()) { prev = sib; } if (!sib) { return PR_FALSE; } } NS_ASSERTION(!prev || prev->GetNextSibling() == aFrame, "Unexpected prevsibling"); if (aFrame == childList) { childList = aFrame->GetNextSibling(); } else { prev->SetNextSibling(aFrame->GetNextSibling()); } if (aFrame == lastChild) { lastChild = prev; } aFrame->SetNextSibling(nsnull); return PR_TRUE; } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. Contains // state information needed for absolutely positioned elements struct nsAbsoluteItems : nsFrameItems { // containing block for absolutely positioned elements nsIFrame* containingBlock; nsAbsoluteItems(nsIFrame* aContainingBlock); #ifdef DEBUG // XXXbz Does this need a debug-only assignment operator that nulls out the // childList in the nsAbsoluteItems we're copying? Introducing a difference // between debug and non-debug behavior seems bad, so I guess not... ~nsAbsoluteItems() { NS_ASSERTION(!childList, "Dangling child list. Someone forgot to insert it?"); } #endif // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); }; nsAbsoluteItems::nsAbsoluteItems(nsIFrame* aContainingBlock) : containingBlock(aContainingBlock) { } // Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag void nsAbsoluteItems::AddChild(nsIFrame* aChild) { NS_ASSERTION(aChild->PresContext()->FrameManager()-> GetPlaceholderFrameFor(aChild), "Child without placeholder being added to nsAbsoluteItems?"); aChild->AddStateBits(NS_FRAME_OUT_OF_FLOW); nsFrameItems::AddChild(aChild); } // ----------------------------------------------------------- // Structure for saving the existing state when pushing/poping containing // blocks. The destructor restores the state to its previous state class NS_STACK_CLASS nsFrameConstructorSaveState { public: nsFrameConstructorSaveState(); ~nsFrameConstructorSaveState(); private: nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore PRPackedBool* mFixedPosIsAbsPos; nsAbsoluteItems mSavedItems; // copy of original data PRPackedBool mSavedFixedPosIsAbsPos; // The name of the child list in which our frames would belong nsIAtom* mChildListName; nsFrameConstructorState* mState; friend class nsFrameConstructorState; }; // Structure used for maintaining state information during the // frame construction process class NS_STACK_CLASS nsFrameConstructorState { public: nsPresContext *mPresContext; nsIPresShell *mPresShell; nsFrameManager *mFrameManager; #ifdef MOZ_XUL // Frames destined for the nsGkAtoms::popupList. nsAbsoluteItems mPopupItems; #endif // Containing block information for out-of-flow frames. nsAbsoluteItems mFixedItems; nsAbsoluteItems mAbsoluteItems; nsAbsoluteItems mFloatedItems; // When working with the -moz-transform property, we want to hook // the abs-pos and fixed-pos lists together, since transformed // elements are fixed-pos containing blocks. This flag determines // whether or not we want to wire the fixed-pos and abs-pos lists // together. PRPackedBool mFixedPosIsAbsPos; // A boolean to indicate whether we have a "pending" popupgroup. That is, we // have already created the FrameConstructionItem for the root popupgroup but // we have not yet created the relevant frame. PRPackedBool mHavePendingPopupgroup; nsCOMPtr mFrameState; // These bits will be added to the state bits of any frame we construct // using this state. nsFrameState mAdditionalStateBits; // Constructor // Use the passed-in history state. nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock, nsILayoutHistoryState* aHistoryState); // Get the history state from the pres context's pres shell. nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock); ~nsFrameConstructorState(); // Function to push the existing absolute containing block state and // create a new scope. Code that uses this function should get matching // logic in GetAbsoluteContainingBlock. void PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock, nsFrameConstructorSaveState& aSaveState); // Function to push the existing float containing block state and // create a new scope. Code that uses this function should get matching // logic in GetFloatContainingBlock. // Pushing a null float containing block forbids any frames from being // floated until a new float containing block is pushed. // XXX we should get rid of null float containing blocks and teach the // various frame classes to deal with floats instead. void PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState); // Function to return the proper geometric parent for a frame with display // struct given by aStyleDisplay and parent's frame given by // aContentParentFrame. nsIFrame* GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsIFrame* aContentParentFrame); /** * Function to add a new frame to the right frame list. This MUST be called * on frames before their children have been processed if the frames might * conceivably be out-of-flow; otherwise cleanup in error cases won't work * right. Also, this MUST be called on frames after they have been * initialized. * @param aNewFrame the frame to add * @param aFrameItems the list to add in-flow frames to * @param aContent the content pointer for aNewFrame * @param aStyleContext the style context resolved for aContent * @param aParentFrame the parent frame for the content if it were in-flow * @param aCanBePositioned pass false if the frame isn't allowed to be * positioned * @param aCanBeFloated pass false if the frame isn't allowed to be * floated * @param aIsOutOfFlowPopup pass true if the frame is an out-of-flow popup * (XUL-only) * @throws NS_ERROR_OUT_OF_MEMORY if it happens. * @note If this method throws, that means that aNewFrame was not inserted * into any frame lists. Furthermore, this method will handle cleanup * of aNewFrame (via calling CleanupFrameReferences() and Destroy() on * it). */ nsresult AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, PRBool aCanBePositioned = PR_TRUE, PRBool aCanBeFloated = PR_TRUE, PRBool aIsOutOfFlowPopup = PR_FALSE, PRBool aInsertAfter = PR_FALSE, nsIFrame* aInsertAfterFrame = nsnull); /** * Function to return the fixed-pos element list. Normally this will just hand back the * fixed-pos element list, but in case we're dealing with a transformed element that's * acting as an abs-pos and fixed-pos container, we'll hand back the abs-pos list. Callers should * use this function if they want to get the list acting as the fixed-pos item parent. */ nsAbsoluteItems& GetFixedItems() { return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems; } const nsAbsoluteItems& GetFixedItems() const { return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems; } protected: friend class nsFrameConstructorSaveState; /** * ProcessFrameInsertions takes the frames in aFrameItems and adds them as * kids to the aChildListName child list of |aFrameItems.containingBlock|. */ void ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, nsIAtom* aChildListName); }; nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock, nsILayoutHistoryState* aHistoryState) : mPresContext(aPresShell->GetPresContext()), mPresShell(aPresShell), mFrameManager(aPresShell->FrameManager()), #ifdef MOZ_XUL mPopupItems(nsnull), #endif mFixedItems(aFixedContainingBlock), mAbsoluteItems(aAbsoluteContainingBlock), mFloatedItems(aFloatContainingBlock), // See PushAbsoluteContaningBlock below mFixedPosIsAbsPos(aAbsoluteContainingBlock && aAbsoluteContainingBlock->GetStyleDisplay()-> HasTransform()), mHavePendingPopupgroup(PR_FALSE), mFrameState(aHistoryState), mAdditionalStateBits(0) { #ifdef MOZ_XUL nsIRootBox* rootBox = nsIRootBox::GetRootBox(aPresShell); if (rootBox) { mPopupItems.containingBlock = rootBox->GetPopupSetFrame(); } #endif MOZ_COUNT_CTOR(nsFrameConstructorState); } nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell, nsIFrame* aFixedContainingBlock, nsIFrame* aAbsoluteContainingBlock, nsIFrame* aFloatContainingBlock) : mPresContext(aPresShell->GetPresContext()), mPresShell(aPresShell), mFrameManager(aPresShell->FrameManager()), #ifdef MOZ_XUL mPopupItems(nsnull), #endif mFixedItems(aFixedContainingBlock), mAbsoluteItems(aAbsoluteContainingBlock), mFloatedItems(aFloatContainingBlock), // See PushAbsoluteContaningBlock below mFixedPosIsAbsPos(aAbsoluteContainingBlock && aAbsoluteContainingBlock->GetStyleDisplay()-> HasTransform()), mHavePendingPopupgroup(PR_FALSE), mAdditionalStateBits(0) { #ifdef MOZ_XUL nsIRootBox* rootBox = nsIRootBox::GetRootBox(aPresShell); if (rootBox) { mPopupItems.containingBlock = rootBox->GetPopupSetFrame(); } #endif MOZ_COUNT_CTOR(nsFrameConstructorState); mFrameState = aPresShell->GetDocument()->GetLayoutHistoryState(); } nsFrameConstructorState::~nsFrameConstructorState() { // Frame order comparison functions only work properly when the placeholders // have been inserted into the frame tree. So for example if we have a new float // containing the placeholder for a new abs-pos frame, and we process the abs-pos // insertion first, then we won't be able to find the right place to insert in // in the abs-pos list. So put floats in first, because they can contain placeholders // for abs-pos and fixed-pos items whose containing blocks are outside the floats. // Then put abs-pos frames in, because they can contain placeholders for fixed-pos // items whose containing block is outside the abs-pos frames. MOZ_COUNT_DTOR(nsFrameConstructorState); ProcessFrameInsertions(mFloatedItems, nsGkAtoms::floatList); ProcessFrameInsertions(mAbsoluteItems, nsGkAtoms::absoluteList); ProcessFrameInsertions(mFixedItems, nsGkAtoms::fixedList); #ifdef MOZ_XUL ProcessFrameInsertions(mPopupItems, nsGkAtoms::popupList); #endif } static nsIFrame* AdjustAbsoluteContainingBlock(nsIFrame* aContainingBlockIn) { if (!aContainingBlockIn) { return nsnull; } // Always use the container's first continuation. (Inline frames can have // non-fluid bidi continuations...) return aContainingBlockIn->GetFirstContinuation(); } void nsFrameConstructorState::PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock, nsFrameConstructorSaveState& aSaveState) { aSaveState.mItems = &mAbsoluteItems; aSaveState.mSavedItems = mAbsoluteItems; aSaveState.mChildListName = nsGkAtoms::absoluteList; aSaveState.mState = this; /* Store whether we're wiring the abs-pos and fixed-pos lists together. */ aSaveState.mFixedPosIsAbsPos = &mFixedPosIsAbsPos; aSaveState.mSavedFixedPosIsAbsPos = mFixedPosIsAbsPos; mAbsoluteItems = nsAbsoluteItems(AdjustAbsoluteContainingBlock(aNewAbsoluteContainingBlock)); /* See if we're wiring the fixed-pos and abs-pos lists together. This happens iff * we're a transformed element. */ mFixedPosIsAbsPos = (aNewAbsoluteContainingBlock && aNewAbsoluteContainingBlock->GetStyleDisplay()->HasTransform()); } void nsFrameConstructorState::PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState) { NS_PRECONDITION(!aNewFloatContainingBlock || aNewFloatContainingBlock->IsFloatContainingBlock(), "Please push a real float containing block!"); aSaveState.mItems = &mFloatedItems; aSaveState.mSavedItems = mFloatedItems; aSaveState.mChildListName = nsGkAtoms::floatList; aSaveState.mState = this; mFloatedItems = nsAbsoluteItems(aNewFloatContainingBlock); } nsIFrame* nsFrameConstructorState::GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsIFrame* aContentParentFrame) { NS_PRECONDITION(aStyleDisplay, "Must have display struct!"); // If there is no container for a fixed, absolute, or floating root // frame, we will ignore the positioning. This hack is originally // brought to you by the letter T: tables, since other roots don't // even call into this code. See bug 178855. // // XXX Disabling positioning in this case is a hack. If one was so inclined, // one could support this either by (1) inserting a dummy block between the // table and the canvas or (2) teaching the canvas how to reflow positioned // elements. (1) has the usual problems when multiple frames share the same // content (notice all the special cases in this file dealing with inner // tables and outer tables which share the same content). (2) requires some // work and possible factoring. // // XXXbz couldn't we just force position to "static" on roots and // float to "none"? That's OK per CSS 2.1, as far as I can tell. if (aStyleDisplay->IsFloating() && mFloatedItems.containingBlock) { NS_ASSERTION(!aStyleDisplay->IsAbsolutelyPositioned(), "Absolutely positioned _and_ floating?"); return mFloatedItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_ABSOLUTE && mAbsoluteItems.containingBlock) { return mAbsoluteItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_FIXED && GetFixedItems().containingBlock) { return GetFixedItems().containingBlock; } return aContentParentFrame; } nsresult nsFrameConstructorState::AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, PRBool aCanBePositioned, PRBool aCanBeFloated, PRBool aIsOutOfFlowPopup, PRBool aInsertAfter, nsIFrame* aInsertAfterFrame) { const nsStyleDisplay* disp = aNewFrame->GetStyleDisplay(); // The comments in GetGeometricParent regarding root table frames // all apply here, unfortunately. PRBool needPlaceholder = PR_FALSE; nsFrameItems* frameItems = &aFrameItems; #ifdef MOZ_XUL if (NS_UNLIKELY(aIsOutOfFlowPopup)) { NS_ASSERTION(aNewFrame->GetParent() == mPopupItems.containingBlock, "Popup whose parent is not the popup containing block?"); NS_ASSERTION(mPopupItems.containingBlock, "Must have a popup set frame!"); needPlaceholder = PR_TRUE; frameItems = &mPopupItems; } else #endif // MOZ_XUL if (aCanBeFloated && disp->IsFloating() && mFloatedItems.containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == mFloatedItems.containingBlock, "Float whose parent is not the float containing block?"); needPlaceholder = PR_TRUE; frameItems = &mFloatedItems; } else if (aCanBePositioned) { if (disp->mPosition == NS_STYLE_POSITION_ABSOLUTE && mAbsoluteItems.containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == mAbsoluteItems.containingBlock, "Abs pos whose parent is not the abs pos containing block?"); needPlaceholder = PR_TRUE; frameItems = &mAbsoluteItems; } if (disp->mPosition == NS_STYLE_POSITION_FIXED && GetFixedItems().containingBlock) { NS_ASSERTION(aNewFrame->GetParent() == GetFixedItems().containingBlock, "Fixed pos whose parent is not the fixed pos containing block?"); needPlaceholder = PR_TRUE; frameItems = &GetFixedItems(); } } if (needPlaceholder) { NS_ASSERTION(frameItems != &aFrameItems, "Putting frame in-flow _and_ want a placeholder?"); nsIFrame* placeholderFrame; nsresult rv = nsCSSFrameConstructor::CreatePlaceholderFrameFor(mPresShell, aContent, aNewFrame, aStyleContext, aParentFrame, nsnull, &placeholderFrame); if (NS_FAILED(rv)) { // Note that aNewFrame could be the top frame for a scrollframe setup, // hence already set as the primary frame. So we have to clean up here. // But it shouldn't have any out-of-flow kids. // XXXbz Maybe add a utility function to assert that? CleanupFrameReferences(mFrameManager, aNewFrame); aNewFrame->Destroy(); return rv; } placeholderFrame->AddStateBits(mAdditionalStateBits); // Add the placeholder frame to the flow aFrameItems.AddChild(placeholderFrame); } #ifdef DEBUG else { NS_ASSERTION(aNewFrame->GetParent() == aParentFrame, "In-flow frame has wrong parent"); } #endif if (aInsertAfter) { frameItems->InsertChildAfter(aNewFrame, aInsertAfterFrame); } else { frameItems->AddChild(aNewFrame); } // Now add the special siblings too. nsIFrame* specialSibling = aNewFrame; while (specialSibling && IsFrameSpecial(specialSibling)) { specialSibling = GetSpecialSibling(specialSibling); if (specialSibling) { NS_ASSERTION(frameItems == &aFrameItems, "IB split ending up in an out-of-flow childlist?"); frameItems->AddChild(specialSibling); } } return NS_OK; } void nsFrameConstructorState::ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, nsIAtom* aChildListName) { #define NS_NONXUL_LIST_TEST (&aFrameItems == &mFloatedItems && \ aChildListName == nsGkAtoms::floatList) || \ (&aFrameItems == &mAbsoluteItems && \ aChildListName == nsGkAtoms::absoluteList) || \ (&aFrameItems == &mFixedItems && \ aChildListName == nsGkAtoms::fixedList) #ifdef MOZ_XUL NS_PRECONDITION(NS_NONXUL_LIST_TEST || (&aFrameItems == &mPopupItems && aChildListName == nsGkAtoms::popupList), "Unexpected aFrameItems/aChildListName combination"); #else NS_PRECONDITION(NS_NONXUL_LIST_TEST, "Unexpected aFrameItems/aChildListName combination"); #endif nsIFrame* firstNewFrame = aFrameItems.childList; if (!firstNewFrame) { return; } nsIFrame* containingBlock = aFrameItems.containingBlock; NS_ASSERTION(containingBlock, "Child list without containing block?"); // Insert the frames hanging out in aItems. We can use SetInitialChildList() // if the containing block hasn't been reflown yet (so NS_FRAME_FIRST_REFLOW // is set) and doesn't have any frames in the aChildListName child list yet. nsIFrame* firstChild = containingBlock->GetFirstChild(aChildListName); nsresult rv = NS_OK; if (!firstChild && (containingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { rv = containingBlock->SetInitialChildList(aChildListName, firstNewFrame); } else { // Note that whether the frame construction context is doing an append or // not is not helpful here, since it could be appending to some frame in // the middle of the document, which means we're not necessarily // appending to the children of the containing block. // // We need to make sure the 'append to the end of document' case is fast. // So first test the last child of the containing block nsIFrame* lastChild = nsLayoutUtils::GetLastSibling(firstChild); // CompareTreePosition uses placeholder hierarchy for out of flow frames, // so this will make out-of-flows respect the ordering of placeholders, // which is great because it takes care of anonymous content. if (!lastChild || nsLayoutUtils::CompareTreePosition(lastChild, firstNewFrame, containingBlock) < 0) { // no lastChild, or lastChild comes before the new children, so just append rv = containingBlock->AppendFrames(aChildListName, firstNewFrame); } else { nsIFrame* insertionPoint = nsnull; // try the other children for (nsIFrame* f = firstChild; f != lastChild; f = f->GetNextSibling()) { PRInt32 compare = nsLayoutUtils::CompareTreePosition(f, firstNewFrame, containingBlock); if (compare > 0) { // f comes after the new children, so stop here and insert after // the previous frame break; } insertionPoint = f; } rv = containingBlock->InsertFrames(aChildListName, insertionPoint, firstNewFrame); } } aFrameItems.childList = nsnull; // XXXbz And if NS_FAILED(rv), what? I guess we need to clean up the list // and deal with all the placeholders... but what if the placeholders aren't // in the document yet? Could that happen? NS_ASSERTION(NS_SUCCEEDED(rv), "Frames getting lost!"); } nsFrameConstructorSaveState::nsFrameConstructorSaveState() : mItems(nsnull), mFixedPosIsAbsPos(nsnull), mSavedItems(nsnull), mSavedFixedPosIsAbsPos(PR_FALSE), mChildListName(nsnull), mState(nsnull) { } nsFrameConstructorSaveState::~nsFrameConstructorSaveState() { // Restore the state if (mItems) { NS_ASSERTION(mState, "Can't have mItems set without having a state!"); mState->ProcessFrameInsertions(*mItems, mChildListName); *mItems = mSavedItems; #ifdef DEBUG // We've transferred the child list, so drop the pointer we held to it. // Note that this only matters for the assert in ~nsAbsoluteItems. mSavedItems.childList = nsnull; #endif } if (mFixedPosIsAbsPos) { *mFixedPosIsAbsPos = mSavedFixedPosIsAbsPos; } } static PRBool IsBorderCollapse(nsIFrame* aFrame) { for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) { if (nsGkAtoms::tableFrame == frame->GetType()) { return ((nsTableFrame*)frame)->IsBorderCollapse(); } } NS_ASSERTION(PR_FALSE, "program error"); return PR_FALSE; } /** * Utility method, called from MoveChildrenTo(), that recursively * descends down the frame hierarchy looking for floating frames that * need parent pointer adjustments to account for the containment block * changes that could occur as the result of the reparenting done in * MoveChildrenTo(). */ static void AdjustFloatParentPtrs(nsIFrame* aFrame, nsFrameConstructorState& aState, nsFrameConstructorState& aOuterState) { NS_PRECONDITION(aFrame, "must have frame to work with"); nsIFrame *outOfFlowFrame = nsPlaceholderFrame::GetRealFrameFor(aFrame); if (outOfFlowFrame != aFrame) { if (outOfFlowFrame->GetStyleDisplay()->IsFloating()) { // Update the parent pointer for outOfFlowFrame since its // containing block has changed as the result of reparenting // and move it from the outer state to the inner, bug 307277. nsIFrame *parent = aState.mFloatedItems.containingBlock; NS_ASSERTION(parent, "Should have float containing block here!"); NS_ASSERTION(outOfFlowFrame->GetParent() == aOuterState.mFloatedItems.containingBlock, "expected the float to be a child of the outer CB"); if (aOuterState.mFloatedItems.RemoveChild(outOfFlowFrame, nsnull)) { aState.mFloatedItems.AddChild(outOfFlowFrame); } else { NS_NOTREACHED("float wasn't in the outer state float list"); } outOfFlowFrame->SetParent(parent); if (outOfFlowFrame->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) { // We don't need to walk up the tree, since we're doing this // recursively. parent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); } } // All out-of-flows are automatically float containing blocks, so we're // done here. return; } if (aFrame->IsFloatContainingBlock()) { // No need to recurse further; floats whose placeholders are // inside a block already have the right parent. return; } // Dive down into children to see if any of their // placeholders need adjusting. nsIFrame *childFrame = aFrame->GetFirstChild(nsnull); while (childFrame) { // XXX_kin: Do we need to prevent descent into anonymous content here? AdjustFloatParentPtrs(childFrame, aState, aOuterState); childFrame = childFrame->GetNextSibling(); } } /** * Moves frames to a new parent, updating the style context and propagating * relevant frame state bits. |aState| may be null, in which case the parent * pointers of out-of-flow frames will remain untouched. */ static void MoveChildrenTo(nsFrameManager* aFrameManager, nsIFrame* aNewParent, nsIFrame* aFrameList, nsIFrame* aFrameListEnd, nsFrameConstructorState* aState, nsFrameConstructorState* aOuterState) { PRBool setHasChildWithView = PR_FALSE; while (aFrameList && aFrameList != aFrameListEnd) { if (!setHasChildWithView && (aFrameList->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW))) { setHasChildWithView = PR_TRUE; } aFrameList->SetParent(aNewParent); // If aState is not null, the caller expects us to make adjustments so that // floats whose placeholders are descendants of frames in aFrameList point // to the correct parent. if (aState) { NS_ASSERTION(aOuterState, "need an outer state too"); AdjustFloatParentPtrs(aFrameList, *aState, *aOuterState); } aFrameList = aFrameList->GetNextSibling(); } if (setHasChildWithView) { do { aNewParent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW); aNewParent = aNewParent->GetParent(); } while (aNewParent && !(aNewParent->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)); } } // ----------------------------------------------------------- // Structure used to ensure that bindings are properly enqueued in the // binding manager's attached queue. struct NS_STACK_CLASS nsAutoEnqueueBinding { nsAutoEnqueueBinding(nsIDocument* aDocument) : mDocument(aDocument) {} ~nsAutoEnqueueBinding(); nsRefPtr mBinding; private: nsIDocument* mDocument; }; nsAutoEnqueueBinding::~nsAutoEnqueueBinding() { if (mBinding) { mDocument->BindingManager()->AddToAttachedQueue(mBinding); } } // Helper function that determines the child list name that aChildFrame // is contained in static nsIAtom* GetChildListNameFor(nsIFrame* aChildFrame) { nsIAtom* listName; if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) { listName = nsGkAtoms::overflowContainersList; } // See if the frame is moved out of the flow else if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { // Look at the style information to tell const nsStyleDisplay* disp = aChildFrame->GetStyleDisplay(); if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) { listName = nsGkAtoms::absoluteList; } else if (NS_STYLE_POSITION_FIXED == disp->mPosition) { if (nsLayoutUtils::IsReallyFixedPos(aChildFrame)) { listName = nsGkAtoms::fixedList; } else { listName = nsGkAtoms::absoluteList; } #ifdef MOZ_XUL } else if (NS_STYLE_DISPLAY_POPUP == disp->mDisplay) { // Out-of-flows that are DISPLAY_POPUP must be kids of the root popup set #ifdef DEBUG nsIFrame* parent = aChildFrame->GetParent(); NS_ASSERTION(parent && parent->GetType() == nsGkAtoms::popupSetFrame, "Unexpected parent"); #endif // DEBUG // XXX FIXME: Bug 350740 // Return here, because the postcondition for this function actually // fails for this case, since the popups are not in a "real" frame list // in the popup set. return nsGkAtoms::popupList; #endif // MOZ_XUL } else { NS_ASSERTION(aChildFrame->GetStyleDisplay()->IsFloating(), "not a floated frame"); listName = nsGkAtoms::floatList; } } else { listName = nsnull; } #ifdef NS_DEBUG // Verify that the frame is actually in that child list or in the // corresponding overflow list. nsIFrame* parent = aChildFrame->GetParent(); PRBool found = nsFrameList(parent->GetFirstChild(listName)) .ContainsFrame(aChildFrame); if (!found) { if (!(aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { found = nsFrameList(parent->GetFirstChild(nsGkAtoms::overflowList)) .ContainsFrame(aChildFrame); } else if (aChildFrame->GetStyleDisplay()->IsFloating()) { found = nsFrameList(parent->GetFirstChild(nsGkAtoms::overflowOutOfFlowList)) .ContainsFrame(aChildFrame); } // else it's positioned and should have been on the 'listName' child list. NS_POSTCONDITION(found, "not in child list"); } #endif return listName; } //---------------------------------------------------------------------- nsCSSFrameConstructor::nsCSSFrameConstructor(nsIDocument *aDocument, nsIPresShell *aPresShell) : mDocument(aDocument) , mPresShell(aPresShell) , mRootElementFrame(nsnull) , mRootElementStyleFrame(nsnull) , mFixedContainingBlock(nsnull) , mDocElementContainingBlock(nsnull) , mGfxScrollFrame(nsnull) , mPageSequenceFrame(nsnull) , mUpdateCount(0) , mFocusSuppressCount(0) , mQuotesDirty(PR_FALSE) , mCountersDirty(PR_FALSE) , mIsDestroyingFrameTree(PR_FALSE) , mRebuildAllStyleData(PR_FALSE) , mHasRootAbsPosContainingBlock(PR_FALSE) , mHoverGeneration(0) , mRebuildAllExtraHint(nsChangeHint(0)) { // XXXbz this should be in Init() or something! if (!mPendingRestyles.Init()) { // now what? } #ifdef DEBUG static PRBool gFirstTime = PR_TRUE; if (gFirstTime) { gFirstTime = PR_FALSE; char* flags = PR_GetEnv("GECKO_FRAMECTOR_DEBUG_FLAGS"); if (flags) { PRBool error = PR_FALSE; for (;;) { char* comma = PL_strchr(flags, ','); if (comma) *comma = '\0'; PRBool found = PR_FALSE; FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { if (PL_strcasecmp(flag->name, flags) == 0) { *(flag->on) = PR_TRUE; printf("nsCSSFrameConstructor: setting %s debug flag on\n", flag->name); found = PR_TRUE; break; } ++flag; } if (! found) error = PR_TRUE; if (! comma) break; *comma = ','; flags = comma + 1; } if (error) { printf("Here are the available GECKO_FRAMECTOR_DEBUG_FLAGS:\n"); FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { printf(" %s\n", flag->name); ++flag; } printf("Note: GECKO_FRAMECTOR_DEBUG_FLAGS is a comma separated list of flag\n"); printf("names (no whitespace)\n"); } } } #endif } nsIXBLService * nsCSSFrameConstructor::GetXBLService() { if (!gXBLService) { nsresult rv = CallGetService("@mozilla.org/xbl;1", &gXBLService); if (NS_FAILED(rv)) gXBLService = nsnull; } return gXBLService; } void nsCSSFrameConstructor::NotifyDestroyingFrame(nsIFrame* aFrame) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { if (mQuoteList.DestroyNodesFor(aFrame)) QuotesDirty(); } if (mCounterManager.DestroyNodesFor(aFrame)) { // Technically we don't need to update anything if we destroyed only // USE nodes. However, this is unlikely to happen in the real world // since USE nodes generally go along with INCREMENT nodes. CountersDirty(); } } struct nsGenConInitializer { nsAutoPtr mNode; nsGenConList* mList; void (nsCSSFrameConstructor::*mDirtyAll)(); nsGenConInitializer(nsGenConNode* aNode, nsGenConList* aList, void (nsCSSFrameConstructor::*aDirtyAll)()) : mNode(aNode), mList(aList), mDirtyAll(aDirtyAll) {} }; static void DestroyGenConInitializer(void* aFrame, nsIAtom* aPropertyName, void* aPropertyValue, void* aDtorData) { delete static_cast(aPropertyValue); } already_AddRefed nsCSSFrameConstructor::CreateGenConTextNode(const nsString& aString, nsCOMPtr* aText, nsGenConInitializer* aInitializer) { nsCOMPtr content; NS_NewTextNode(getter_AddRefs(content), mDocument->NodeInfoManager()); if (!content) { // XXX The quotes/counters code doesn't like the text pointer // being null in case of dynamic changes! NS_ASSERTION(!aText, "this OOM case isn't handled very well"); return nsnull; } content->SetText(aString, PR_FALSE); if (aText) { *aText = do_QueryInterface(content); } if (aInitializer) { content->SetProperty(nsGkAtoms::genConInitializerProperty, aInitializer, DestroyGenConInitializer); } return content.forget(); } already_AddRefed nsCSSFrameConstructor::CreateGeneratedContent(nsIContent* aParentContent, nsStyleContext* aStyleContext, PRUint32 aContentIndex) { // Get the content value const nsStyleContentData &data = aStyleContext->GetStyleContent()->ContentAt(aContentIndex); nsStyleContentType type = data.mType; if (eStyleContentType_Image == type) { if (!data.mContent.mImage) { // CSS had something specified that couldn't be converted to an // image object return nsnull; } // Create an image content object and pass it the image request. // XXX Check if it's an image type we can handle... nsCOMPtr nodeInfo; nodeInfo = mDocument->NodeInfoManager()->GetNodeInfo(nsGkAtoms::mozgeneratedcontentimage, nsnull, kNameSpaceID_XHTML); nsCOMPtr content; NS_NewGenConImageContent(getter_AddRefs(content), nodeInfo, data.mContent.mImage); return content.forget(); } switch (type) { case eStyleContentType_String: return CreateGenConTextNode(nsDependentString(data.mContent.mString), nsnull, nsnull); case eStyleContentType_Attr: { nsCOMPtr attrName; PRInt32 attrNameSpace = kNameSpaceID_None; nsAutoString contentString(data.mContent.mString); PRInt32 barIndex = contentString.FindChar('|'); // CSS namespace delimiter if (-1 != barIndex) { nsAutoString nameSpaceVal; contentString.Left(nameSpaceVal, barIndex); PRInt32 error; attrNameSpace = nameSpaceVal.ToInteger(&error, 10); contentString.Cut(0, barIndex + 1); if (contentString.Length()) { attrName = do_GetAtom(contentString); } } else { attrName = do_GetAtom(contentString); } if (!attrName) { return nsnull; } nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), attrNameSpace, attrName, getter_AddRefs(content)); return content.forget(); } case eStyleContentType_Counter: case eStyleContentType_Counters: { nsCSSValue::Array* counters = data.mContent.mCounters; nsCounterList* counterList = mCounterManager.CounterListFor( nsDependentString(counters->Item(0).GetStringBufferValue())); if (!counterList) return nsnull; nsCounterUseNode* node = new nsCounterUseNode(counters, aContentIndex, type == eStyleContentType_Counters); if (!node) return nsnull; nsGenConInitializer* initializer = new nsGenConInitializer(node, counterList, &nsCSSFrameConstructor::CountersDirty); return CreateGenConTextNode(EmptyString(), &node->mText, initializer); } case eStyleContentType_Image: NS_NOTREACHED("handled by if above"); return nsnull; case eStyleContentType_OpenQuote: case eStyleContentType_CloseQuote: case eStyleContentType_NoOpenQuote: case eStyleContentType_NoCloseQuote: { nsQuoteNode* node = new nsQuoteNode(type, aContentIndex); if (!node) return nsnull; nsGenConInitializer* initializer = new nsGenConInitializer(node, &mQuoteList, &nsCSSFrameConstructor::QuotesDirty); return CreateGenConTextNode(EmptyString(), &node->mText, initializer); } case eStyleContentType_AltContent: { // Use the "alt" attribute; if that fails and the node is an HTML // , try the value attribute and then fall back to some default // localized text we have. // XXX what if the 'alt' attribute is added later, how will we // detect that and do the right thing here? if (aParentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::alt)) { nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), kNameSpaceID_None, nsGkAtoms::alt, getter_AddRefs(content)); return content.forget(); } if (aParentContent->IsNodeOfType(nsINode::eHTML) && aParentContent->NodeInfo()->Equals(nsGkAtoms::input)) { if (aParentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), kNameSpaceID_None, nsGkAtoms::value, getter_AddRefs(content)); return content.forget(); } nsXPIDLString temp; nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", temp); return CreateGenConTextNode(temp, nsnull, nsnull); } break; } } // switch return nsnull; } /* * aParentFrame - the frame that should be the parent of the generated * content. This is the frame for the corresponding content node, * which must not be a leaf frame. * * Any items created are added to aItems. * * We create an XML element (tag _moz_generated_content_before or * _moz_generated_content_after) representing the pseudoelement. We * create a DOM node for each 'content' item and make those nodes the * children of the XML element. Then we create a frame subtree for * the XML element as if it were a regular child of * aParentFrame/aParentContent, giving the XML element the ::before or * ::after style. */ void nsCSSFrameConstructor::CreateGeneratedContentItem(nsFrameConstructorState& aState, nsIFrame* aParentFrame, nsIContent* aParentContent, nsStyleContext* aStyleContext, nsIAtom* aPseudoElement, FrameConstructionItemList& aItems) { // XXXbz is this ever true? if (!aParentContent->IsNodeOfType(nsINode::eELEMENT)) return; nsStyleSet *styleSet = mPresShell->StyleSet(); // Probe for the existence of the pseudo-element nsRefPtr pseudoStyleContext; pseudoStyleContext = styleSet->ProbePseudoStyleFor(aParentContent, aPseudoElement, aStyleContext); if (!pseudoStyleContext) return; // |ProbePseudoStyleFor| checked the 'display' property and the // |ContentCount()| of the 'content' property for us. nsCOMPtr nodeInfo; nsIAtom* elemName = aPseudoElement == nsCSSPseudoElements::before ? nsGkAtoms::mozgeneratedcontentbefore : nsGkAtoms::mozgeneratedcontentafter; nodeInfo = mDocument->NodeInfoManager()->GetNodeInfo(elemName, nsnull, kNameSpaceID_None); nsCOMPtr container; nsresult rv = NS_NewXMLElement(getter_AddRefs(container), nodeInfo); if (NS_FAILED(rv)) return; container->SetNativeAnonymous(); rv = container->BindToTree(mDocument, aParentContent, aParentContent, PR_TRUE); if (NS_FAILED(rv)) { container->UnbindFromTree(); return; } PRUint32 contentCount = pseudoStyleContext->GetStyleContent()->ContentCount(); for (PRUint32 contentIndex = 0; contentIndex < contentCount; contentIndex++) { nsCOMPtr content = CreateGeneratedContent(aParentContent, pseudoStyleContext, contentIndex); if (content) { container->AppendChildTo(content, PR_FALSE); } } AddFrameConstructionItemsInternal(aState, container, aParentFrame, elemName, kNameSpaceID_None, pseudoStyleContext, ITEM_IS_GENERATED_CONTENT, aItems); } static PRBool TextIsOnlyWhitespace(nsIContent* aContent) { return aContent->IsNodeOfType(nsINode::eTEXT) && aContent->TextIsOnlyWhitespace(); } /**************************************************** ** BEGIN TABLE SECTION ****************************************************/ // The term pseudo frame is being used instead of anonymous frame, since anonymous // frame has been used elsewhere to refer to frames that have generated content // aIncludeSpecial applies to captions, col groups, cols and cells. // These do not generate pseudo frame wrappers for foreign children. // In fact, colgroups never have any children that are not cols and // cols never have any children at all. static PRBool IsTableRelated(nsIAtom* aParentType) { return nsGkAtoms::tableFrame == aParentType || nsGkAtoms::tableRowGroupFrame == aParentType || nsGkAtoms::tableRowFrame == aParentType || nsGkAtoms::tableCaptionFrame == aParentType || nsGkAtoms::tableColGroupFrame == aParentType || nsGkAtoms::tableColFrame == aParentType || IS_TABLE_CELL(aParentType); } /* static */ nsCSSFrameConstructor::ParentType nsCSSFrameConstructor::GetParentType(nsIFrame* aParentFrame) { nsIAtom* type = aParentFrame->GetType(); if (type == nsGkAtoms::tableFrame) { return eTypeTable; } if (type == nsGkAtoms::tableRowGroupFrame) { return eTypeRowGroup; } if (type == nsGkAtoms::tableRowFrame) { return eTypeRow; } if (type == nsGkAtoms::tableColGroupFrame) { return eTypeColGroup; } return eTypeBlock; } static nsIFrame* AdjustCaptionParentFrame(nsIFrame* aParentFrame) { if (nsGkAtoms::tableFrame == aParentFrame->GetType()) { return aParentFrame->GetParent();; } return aParentFrame; } /** * If the parent frame is a |tableFrame| and the child is a * |captionFrame|, then we want to insert the frames beneath the * |tableFrame|'s parent frame. Returns |PR_TRUE| if the parent frame * needed to be fixed up. */ static PRBool GetCaptionAdjustedParent(nsIFrame* aParentFrame, const nsIFrame* aChildFrame, nsIFrame** aAdjParentFrame) { *aAdjParentFrame = aParentFrame; PRBool haveCaption = PR_FALSE; if (nsGkAtoms::tableCaptionFrame == aChildFrame->GetType()) { haveCaption = PR_TRUE; *aAdjParentFrame = AdjustCaptionParentFrame(aParentFrame); } return haveCaption; } void nsCSSFrameConstructor::AdjustParentFrame(nsIFrame* & aParentFrame, const FrameConstructionData* aFCData, nsStyleContext* aStyleContext) { NS_PRECONDITION(aStyleContext, "Must have child's style context"); NS_PRECONDITION(aFCData, "Must have frame construction data"); PRBool tablePart = ((aFCData->mBits & FCDATA_IS_TABLE_PART) != 0); if (tablePart && aStyleContext->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION) { aParentFrame = AdjustCaptionParentFrame(aParentFrame); } } // Pull all the captions present in aItems out into aCaptions static void PullOutCaptionFrames(nsFrameItems& aItems, nsFrameItems& aCaptions) { nsIFrame *child = aItems.childList; nsIFrame* prev = nsnull; while (child) { nsIFrame *nextSibling = child->GetNextSibling(); if (nsGkAtoms::tableCaptionFrame == child->GetType()) { aItems.RemoveChild(child, prev); aCaptions.AddChild(child); } else { prev = child; } child = nextSibling; } } // Construct the outer, inner table frames and the children frames for the table. // XXX Page break frames for pseudo table frames are not constructed to avoid the risk // associated with revising the pseudo frame mechanism. The long term solution // of having frames handle page-break-before/after will solve the problem. nsresult nsCSSFrameConstructor::ConstructTable(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_TABLE, "Unexpected call"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const PRUint32 nameSpaceID = aItem.mNameSpaceID; nsresult rv = NS_OK; // create the pseudo SC for the outer table as a child of the inner SC nsRefPtr outerStyleContext; outerStyleContext = mPresShell->StyleSet()-> ResolvePseudoStyleFor(content, nsCSSAnonBoxes::tableOuter, styleContext); // Create the outer table frame which holds the caption and inner table frame nsIFrame* newFrame; #ifdef MOZ_MATHML if (kNameSpaceID_MathML == nameSpaceID) newFrame = NS_NewMathMLmtableOuterFrame(mPresShell, outerStyleContext); else #endif newFrame = NS_NewTableOuterFrame(mPresShell, outerStyleContext); nsIFrame* geometricParent = aState.GetGeometricParent(outerStyleContext->GetStyleDisplay(), aParentFrame); // Init the table outer frame and see if we need to create a view, e.g. // the frame is absolutely positioned InitAndRestoreFrame(aState, content, geometricParent, nsnull, newFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Create the inner table frame nsIFrame* innerFrame; #ifdef MOZ_MATHML if (kNameSpaceID_MathML == nameSpaceID) innerFrame = NS_NewMathMLmtableFrame(mPresShell, styleContext); else #endif innerFrame = NS_NewTableFrame(mPresShell, styleContext); InitAndRestoreFrame(aState, content, newFrame, nsnull, innerFrame); // Put the newly created frames into the right child list newFrame->SetInitialChildList(nsnull, innerFrame); rv = aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } if (!mRootElementFrame) { // The frame we're constructing will be the root element frame. // Set mRootElementFrame before processing children. mRootElementFrame = newFrame; } nsFrameItems childItems; if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { rv = ConstructFramesFromItemList(aState, aItem.mChildItems, innerFrame, childItems); } else { rv = ProcessChildren(aState, content, styleContext, innerFrame, PR_TRUE, childItems, PR_FALSE); } // XXXbz what about cleaning up? if (NS_FAILED(rv)) return rv; nsFrameItems captionItems; PullOutCaptionFrames(childItems, captionItems); // Set the inner table frame's initial primary list innerFrame->SetInitialChildList(nsnull, childItems.childList); // Set the outer table frame's secondary childlist lists if (captionItems.childList) { newFrame->SetInitialChildList(nsGkAtoms::captionList, captionItems.childList); } *aNewFrame = newFrame; return rv; } nsresult nsCSSFrameConstructor::ConstructTableRow(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW, "Unexpected call"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const PRUint32 nameSpaceID = aItem.mNameSpaceID; nsIFrame* newFrame; #ifdef MOZ_MATHML if (kNameSpaceID_MathML == nameSpaceID) newFrame = NS_NewMathMLmtrFrame(mPresShell, styleContext); else #endif newFrame = NS_NewTableRowFrame(mPresShell, styleContext); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, content, aParentFrame, nsnull, newFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); nsFrameItems childItems; nsresult rv; if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { rv = ConstructFramesFromItemList(aState, aItem.mChildItems, newFrame, childItems); } else { rv = ProcessChildren(aState, content, styleContext, newFrame, PR_TRUE, childItems, PR_FALSE); } if (NS_FAILED(rv)) return rv; newFrame->SetInitialChildList(nsnull, childItems.childList); aFrameItems.AddChild(newFrame); *aNewFrame = newFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructTableCol(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsTableColFrame* colFrame = NS_NewTableColFrame(mPresShell, styleContext); if (NS_UNLIKELY(!aNewFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, content, aParentFrame, nsnull, colFrame); NS_ASSERTION(colFrame->GetStyleContext() == styleContext, "Unexpected style context"); // construct additional col frames if the col frame has a span > 1 PRInt32 span = colFrame->GetSpan(); nsIFrame* lastCol = colFrame; for (PRInt32 spanX = 1; spanX < span; spanX++) { nsTableColFrame* newCol = NS_NewTableColFrame(mPresShell, styleContext); if (NS_UNLIKELY(!newCol)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, content, aParentFrame, nsnull, newCol, PR_FALSE); lastCol->SetNextSibling(newCol); lastCol->SetNextContinuation(newCol); newCol->SetPrevContinuation(lastCol); newCol->SetColType(eColAnonymousCol); lastCol = newCol; } aFrameItems.AddChild(colFrame); *aNewFrame = colFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructTableCell(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CELL, "Unexpected call"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const PRUint32 nameSpaceID = aItem.mNameSpaceID; PRBool borderCollapse = IsBorderCollapse(aParentFrame); nsIFrame* newFrame; #ifdef MOZ_MATHML // is border separate in mathml.css and the MathML code doesn't implement // border collapse. For those users who style with border collapse, // give them the default non-MathML table frames that understand border collapse. // This won't break us because MathML table frames are all subclasses of the default // table code, and so we can freely mix with or , or . // What will happen is just that non-MathML frames won't understand MathML attributes // and will therefore miss the special handling that the MathML code does. if (kNameSpaceID_MathML == nameSpaceID && !borderCollapse) newFrame = NS_NewMathMLmtdFrame(mPresShell, styleContext); else #endif // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. newFrame = NS_NewTableCellFrame(mPresShell, styleContext, borderCollapse); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize the table cell frame InitAndRestoreFrame(aState, content, aParentFrame, nsnull, newFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Resolve pseudo style and initialize the body cell frame nsRefPtr innerPseudoStyle; innerPseudoStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(content, nsCSSAnonBoxes::cellContent, styleContext); // Create a block frame that will format the cell's content PRBool isBlock; nsIFrame* cellInnerFrame; #ifdef MOZ_MATHML if (kNameSpaceID_MathML == nameSpaceID) { cellInnerFrame = NS_NewMathMLmtdInnerFrame(mPresShell, innerPseudoStyle); isBlock = PR_FALSE; } else #endif { cellInnerFrame = NS_NewBlockFormattingContext(mPresShell, innerPseudoStyle); isBlock = PR_TRUE; } if (NS_UNLIKELY(!cellInnerFrame)) { newFrame->Destroy(); return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, content, newFrame, nsnull, cellInnerFrame); nsFrameItems childItems; nsresult rv; if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { // Need to push ourselves as a float containing block. // XXXbz it might be nice to work on getting the parent // FrameConstructionItem down into ProcessChildren and just making use of // the push there, but that's a bit of work. nsFrameConstructorSaveState floatSaveState; if (!isBlock) { /* MathML case */ aState.PushFloatContainingBlock(nsnull, floatSaveState); } else { aState.PushFloatContainingBlock(cellInnerFrame, floatSaveState); } rv = ConstructFramesFromItemList(aState, aItem.mChildItems, cellInnerFrame, childItems); } else { // Process the child content rv = ProcessChildren(aState, content, styleContext, cellInnerFrame, PR_TRUE, childItems, isBlock); } if (NS_FAILED(rv)) { // Clean up // XXXbz kids of this stuff need to be cleaned up too! cellInnerFrame->Destroy(); newFrame->Destroy(); return rv; } cellInnerFrame->SetInitialChildList(nsnull, childItems.childList); newFrame->SetInitialChildList(nsnull, cellInnerFrame); aFrameItems.AddChild(newFrame); *aNewFrame = newFrame; return NS_OK; } static PRBool NeedFrameFor(nsIFrame* aParentFrame, nsIContent* aChildContent) { // don't create a whitespace frame if aParentFrame doesn't want it. // always create frames for children in generated content. counter(), // quotes, and attr() content can easily change dynamically and we don't // want to be reconstructing frames. It's not even clear that these // should be considered ignorable just because they evaluate to // whitespace. return !aParentFrame->IsFrameOfType(nsIFrame::eExcludesIgnorableWhitespace) || !TextIsOnlyWhitespace(aChildContent) || aParentFrame->IsGeneratedContentFrame(); } /*********************************************** * END TABLE SECTION ***********************************************/ static PRBool CheckOverflow(nsPresContext* aPresContext, const nsStyleDisplay* aDisplay) { if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE) return PR_FALSE; if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_CLIP) aPresContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_HIDDEN, NS_STYLE_OVERFLOW_HIDDEN); else aPresContext->SetViewportOverflowOverride(aDisplay->mOverflowX, aDisplay->mOverflowY); return PR_TRUE; } /** * This checks the root element and the HTML BODY, if any, for an "overflow" property * that should be applied to the viewport. If one is found then we return the * element that we took the overflow from (which should then be treated as * "overflow:visible"), and we store the overflow style in the prescontext. * @return if scroll was propagated from some content node, the content node it * was propagated from. */ nsIContent* nsCSSFrameConstructor::PropagateScrollToViewport() { // Set default nsPresContext* presContext = mPresShell->GetPresContext(); presContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO); // We never mess with the viewport scroll state // when printing or in print preview if (presContext->IsPaginated()) { return nsnull; } nsIContent* docElement = mDocument->GetRootContent(); // Check the style on the document root element nsStyleSet *styleSet = mPresShell->StyleSet(); nsRefPtr rootStyle; rootStyle = styleSet->ResolveStyleFor(docElement, nsnull); if (!rootStyle) { return nsnull; } if (CheckOverflow(presContext, rootStyle->GetStyleDisplay())) { // tell caller we stole the overflow style from the root element return docElement; } // Don't look in the BODY for non-HTML documents or HTML documents // with non-HTML roots // XXX this should be earlier; we shouldn't even look at the document root // for non-HTML documents. Fix this once we support explicit CSS styling // of the viewport // XXX what about XHTML? nsCOMPtr htmlDoc(do_QueryInterface(mDocument)); if (!htmlDoc || !docElement->IsNodeOfType(nsINode::eHTML)) { return nsnull; } nsCOMPtr body; htmlDoc->GetBody(getter_AddRefs(body)); nsCOMPtr bodyElement = do_QueryInterface(body); if (!bodyElement || !bodyElement->NodeInfo()->Equals(nsGkAtoms::body)) { // The body is not a tag, it's a . return nsnull; } nsRefPtr bodyStyle; bodyStyle = styleSet->ResolveStyleFor(bodyElement, rootStyle); if (!bodyStyle) { return nsnull; } if (CheckOverflow(presContext, bodyStyle->GetStyleDisplay())) { // tell caller we stole the overflow style from the body element return bodyElement; } return nsnull; } /** * New one */ nsresult nsCSSFrameConstructor::ConstructDocElementFrame(nsFrameConstructorState& aState, nsIContent* aDocElement, nsIFrame* aParentFrame, nsIFrame** aNewFrame) { *aNewFrame = nsnull; if (!mTempFrameTreeState) aState.mPresShell->CaptureHistoryState(getter_AddRefs(mTempFrameTreeState)); // ----- reattach gfx scrollbars ------ // Gfx scrollframes were created in the root frame but the primary frame map may have been destroyed if a // new style sheet was loaded so lets reattach the frames to their content. // XXX this seems truly bogus, we wipe out mGfxScrollFrame below if (mGfxScrollFrame) { nsIFrame* gfxScrollbarFrame1 = mGfxScrollFrame->GetFirstChild(nsnull); // Check the frame type because when there aren't scrollbars, we'll // get the canvas. if (gfxScrollbarFrame1 && gfxScrollbarFrame1->GetType() == nsGkAtoms::scrollbarFrame) { // XXX This works, but why? aState.mFrameManager-> SetPrimaryFrameFor(gfxScrollbarFrame1->GetContent(), gfxScrollbarFrame1); nsIFrame* gfxScrollbarFrame2 = gfxScrollbarFrame1->GetNextSibling(); if (gfxScrollbarFrame2 && gfxScrollbarFrame2->GetType() == nsGkAtoms::scrollbarFrame) { // XXX This works, but why? aState.mFrameManager-> SetPrimaryFrameFor(gfxScrollbarFrame2->GetContent(), gfxScrollbarFrame2); } } } // --------- CREATE AREA OR BOX FRAME ------- nsRefPtr styleContext; styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nsnull); const nsStyleDisplay* display = styleContext->GetStyleDisplay(); // Ensure that our XBL bindings are installed. if (display->mBinding) { // Get the XBL loader. nsresult rv; PRBool resolveStyle; nsIXBLService * xblService = GetXBLService(); if (!xblService) return NS_ERROR_FAILURE; nsRefPtr binding; rv = xblService->LoadBindings(aDocElement, display->mBinding->mURI, display->mBinding->mOriginPrincipal, PR_FALSE, getter_AddRefs(binding), &resolveStyle); if (NS_FAILED(rv)) return NS_OK; // Binding will load asynchronously. if (binding) { mDocument->BindingManager()->AddToAttachedQueue(binding); } if (resolveStyle) { styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nsnull); display = styleContext->GetStyleDisplay(); } } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- #ifdef DEBUG PRBool propagatedScrollToViewport = PropagateScrollToViewport() == aDocElement; NS_ASSERTION(!display->IsScrollableOverflow() || aState.mPresContext->IsPaginated() || propagatedScrollToViewport, "Scrollbars should have been propagated to the viewport"); #endif if (NS_UNLIKELY(display->mDisplay == NS_STYLE_DISPLAY_NONE)) { aState.mFrameManager->SetUndisplayedContent(aDocElement, styleContext); mRootElementFrame = nsnull; mRootElementStyleFrame = nsnull; return NS_OK; } nsFrameConstructorSaveState absoluteSaveState; if (mHasRootAbsPosContainingBlock) { // Push the absolute containing block now so we can absolutely position // the root element aState.PushAbsoluteContainingBlock(mDocElementContainingBlock, absoluteSaveState); } nsresult rv; // The rules from CSS 2.1, section 9.2.4, have already been applied // by the style system, so we can assume that display->mDisplay is // either NONE, BLOCK, or TABLE. // contentFrame is the primary frame for the root element. *aNewFrame // is the frame that will be the child of the initial containing block. // These are usually the same frame but they can be different, in // particular if the root frame is positioned, in which case // contentFrame is the out-of-flow frame and *aNewFrame is the // placeholder. nsIFrame* contentFrame; PRBool processChildren = PR_FALSE; // Check whether we need to build a XUL box or SVG root frame #ifdef MOZ_XUL if (aDocElement->IsNodeOfType(nsINode::eXUL)) { contentFrame = NS_NewDocElementBoxFrame(mPresShell, styleContext); if (NS_UNLIKELY(!contentFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aDocElement, aParentFrame, nsnull, contentFrame); *aNewFrame = contentFrame; processChildren = PR_TRUE; } else #endif #ifdef MOZ_SVG if (aDocElement->GetNameSpaceID() == kNameSpaceID_SVG) { if (aDocElement->Tag() == nsGkAtoms::svg && NS_SVGEnabled()) { contentFrame = NS_NewSVGOuterSVGFrame(mPresShell, styleContext); if (NS_UNLIKELY(!contentFrame)) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aDocElement, aState.GetGeometricParent(display, aParentFrame), nsnull, contentFrame); // AddChild takes care of transforming the frame tree for fixed-pos // or abs-pos situations nsFrameItems frameItems; rv = aState.AddChild(contentFrame, frameItems, aDocElement, styleContext, aParentFrame); if (NS_FAILED(rv) || !frameItems.childList) { return rv; } *aNewFrame = frameItems.childList; processChildren = PR_TRUE; // See if we need to create a view nsHTMLContainerFrame::CreateViewForFrame(contentFrame, PR_FALSE); } else { return NS_ERROR_FAILURE; } } else #endif { PRBool docElemIsTable = (display->mDisplay == NS_STYLE_DISPLAY_TABLE); if (docElemIsTable) { // We're going to call the right function ourselves, so no need to give a // function to this FrameConstructionData. // XXXbz on the other hand, if we converted this whole function to // FrameConstructionData/Item, then we'd need the right function // here... but would probably be able to get away with less code in this // function in general. static const FrameConstructionData rootTableData = { 0, nsnull }; nsRefPtr extraRef(styleContext); FrameConstructionItem item(&rootTableData, aDocElement, aDocElement->Tag(), kNameSpaceID_None, extraRef.forget()); nsFrameItems frameItems; // if the document is a table then just populate it. rv = ConstructTable(aState, item, aParentFrame, styleContext->GetStyleDisplay(), frameItems, &contentFrame); if (NS_FAILED(rv)) return rv; if (!contentFrame || !frameItems.childList) return NS_ERROR_FAILURE; *aNewFrame = frameItems.childList; NS_ASSERTION(!frameItems.childList->GetNextSibling(), "multiple root element frames"); } else { contentFrame = NS_NewBlockFrame(mPresShell, styleContext, NS_BLOCK_FLOAT_MGR|NS_BLOCK_MARGIN_ROOT); if (!contentFrame) return NS_ERROR_OUT_OF_MEMORY; nsFrameItems frameItems; rv = ConstructBlock(aState, display, aDocElement, aState.GetGeometricParent(display, aParentFrame), aParentFrame, styleContext, &contentFrame, frameItems, display->IsPositioned()); if (NS_FAILED(rv) || !frameItems.childList) return rv; *aNewFrame = frameItems.childList; NS_ASSERTION(!frameItems.childList->GetNextSibling(), "multiple root element frames"); } } // set the primary frame aState.mFrameManager->SetPrimaryFrameFor(aDocElement, contentFrame); NS_ASSERTION(processChildren ? !mRootElementFrame : mRootElementFrame == contentFrame, "unexpected mRootElementFrame"); mRootElementFrame = contentFrame; // Figure out which frame has the main style for the document element, // assigning it to mRootElementStyleFrame. // Backgrounds should be propagated from that frame to the viewport. PRBool isChild; contentFrame->GetParentStyleContextFrame(aState.mPresContext, &mRootElementStyleFrame, &isChild); if (!isChild) { mRootElementStyleFrame = mRootElementFrame; } if (processChildren) { // Still need to process the child content nsFrameItems childItems; NS_ASSERTION(!nsLayoutUtils::GetAsBlock(contentFrame), "Only XUL and SVG frames should reach here"); ProcessChildren(aState, aDocElement, styleContext, contentFrame, PR_TRUE, childItems, PR_FALSE); // Set the initial child lists contentFrame->SetInitialChildList(nsnull, childItems.childList); } return NS_OK; } nsresult nsCSSFrameConstructor::ConstructRootFrame(nsIContent* aDocElement, nsIFrame** aNewFrame) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(aNewFrame, "null out param"); /* how the root frame hierarchy should look Galley presentation, non-XUL, with scrolling (i.e. not a frameset): ViewportFrame [fixed-cb] nsHTMLScrollFrame CanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Galley presentation, non-XUL, without scrolling (i.e. a frameset): ViewportFrame [fixed-cb] CanvasFrame [abs-cb] root element frame (nsBlockFrame) Galley presentation, XUL ViewportFrame [fixed-cb] nsRootBoxFrame root element frame (nsDocElementBoxFrame) Print presentation, non-XUL ViewportFrame nsSimplePageSequenceFrame nsPageFrame [fixed-cb] nsPageContentFrame CanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Print-preview presentation, non-XUL ViewportFrame nsHTMLScrollFrame nsSimplePageSequenceFrame nsPageFrame [fixed-cb] nsPageContentFrame CanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Print/print preview of XUL is not supported. [fixed-cb]: the default containing block for fixed-pos content [abs-cb]: the default containing block for abs-pos content Meaning of nsCSSFrameConstructor fields: mRootElementFrame is "root element frame". mDocElementContainingBlock is the parent of mRootElementFrame (i.e. CanvasFrame or nsRootBoxFrame) mFixedContainingBlock is the [fixed-cb] mGfxScrollFrame is the nsHTMLScrollFrame mentioned above, or null if there isn't one mPageSequenceFrame is the nsSimplePageSequenceFrame, or null if there isn't one */ // Set up our style rule observer. { mPresShell->StyleSet()->SetBindingManager(mDocument->BindingManager()); } // --------- BUILD VIEWPORT ----------- nsIFrame* viewportFrame = nsnull; nsRefPtr viewportPseudoStyle; nsStyleSet *styleSet = mPresShell->StyleSet(); viewportPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::viewport, nsnull); viewportFrame = NS_NewViewportFrame(mPresShell, viewportPseudoStyle); nsPresContext* presContext = mPresShell->GetPresContext(); // XXXbz do we _have_ to pass a null content pointer to that frame? // Would it really kill us to pass in the root element or something? // What would that break? viewportFrame->Init(nsnull, nsnull, nsnull); // Bind the viewport frame to the root view nsIViewManager* viewManager = mPresShell->GetViewManager(); nsIView* rootView; viewManager->GetRootView(rootView); viewportFrame->SetView(rootView); nsContainerFrame::SyncFrameViewProperties(presContext, viewportFrame, viewportPseudoStyle, rootView); // The viewport is the containing block for 'fixed' elements mFixedContainingBlock = viewportFrame; // --------- CREATE ROOT FRAME ------- // Create the root frame. The document element's frame is a child of the // root frame. // // The root frame serves two purposes: // - reserves space for any margins needed for the document element's frame // - renders the document element's background. This ensures the background covers // the entire canvas as specified by the CSS2 spec PRBool isPaginated = presContext->IsRootPaginatedDocument(); nsIFrame* rootFrame = nsnull; nsIAtom* rootPseudo; if (!isPaginated) { #ifdef MOZ_XUL if (aDocElement->IsNodeOfType(nsINode::eXUL)) { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewRootBoxFrame(mPresShell, viewportPseudoStyle); } else #endif { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewCanvasFrame(mPresShell, viewportPseudoStyle); mHasRootAbsPosContainingBlock = PR_TRUE; } rootPseudo = nsCSSAnonBoxes::canvas; mDocElementContainingBlock = rootFrame; } else { // Create a page sequence frame rootFrame = NS_NewSimplePageSequenceFrame(mPresShell, viewportPseudoStyle); mPageSequenceFrame = rootFrame; rootPseudo = nsCSSAnonBoxes::pageSequence; } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- // If the device supports scrolling (e.g., in galley mode on the screen and // for print-preview, but not when printing), then create a scroll frame that // will act as the scrolling mechanism for the viewport. // XXX Do we even need a viewport when printing to a printer? // As long as the webshell doesn't prohibit it, and the device supports // it, create a scroll frame that will act as the scolling mechanism for // the viewport. // // Threre are three possible values stored in the docshell: // 1) nsIScrollable::Scrollbar_Never = no scrollbars // 2) nsIScrollable::Scrollbar_Auto = scrollbars appear if needed // 3) nsIScrollable::Scrollbar_Always = scrollbars always // Only need to create a scroll frame/view for cases 2 and 3. PRBool isHTML = aDocElement->IsNodeOfType(nsINode::eHTML); PRBool isXUL = PR_FALSE; if (!isHTML) { isXUL = aDocElement->IsNodeOfType(nsINode::eXUL); } // Never create scrollbars for XUL documents PRBool isScrollable = !isXUL; // Never create scrollbars for frameset documents. if (isHTML) { nsCOMPtr htmlDoc = do_QueryInterface(mDocument); if (htmlDoc && htmlDoc->GetIsFrameset()) isScrollable = PR_FALSE; } if (isPaginated) { isScrollable = presContext->HasPaginatedScrolling(); } // We no longer need to do overflow propagation here. It's taken care of // when we construct frames for the element whose overflow might be // propagated NS_ASSERTION(!isScrollable || !isXUL, "XUL documents should never be scrollable - see above"); nsIFrame* newFrame = rootFrame; nsRefPtr rootPseudoStyle; // we must create a state because if the scrollbars are GFX it needs the // state to build the scrollbar frames. nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull); nsIFrame* parentFrame = viewportFrame; // If paginated, make sure we don't put scrollbars in if (!isScrollable) { rootPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, rootPseudo, viewportPseudoStyle); } else { if (rootPseudo == nsCSSAnonBoxes::canvas) { rootPseudo = nsCSSAnonBoxes::scrolledCanvas; } else { NS_ASSERTION(rootPseudo == nsCSSAnonBoxes::pageSequence, "Unknown root pseudo"); rootPseudo = nsCSSAnonBoxes::scrolledPageSequence; } // Build the frame. We give it the content we are wrapping which is the document, // the root frame, the parent view port frame, and we should get back the new // frame and the scrollable view if one was created. // resolve a context for the scrollframe nsRefPtr styleContext; styleContext = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::viewportScroll, viewportPseudoStyle); // Note that the viewport scrollframe is always built with // overflow:auto style. This forces the scroll frame to create // anonymous content for both scrollbars. This is necessary even // if the HTML or BODY elements are overriding the viewport // scroll style to 'hidden' --- dynamic style changes might put // scrollbars back on the viewport and we don't want to have to // reframe the viewport to create the scrollbar content. newFrame = nsnull; rootPseudoStyle = BeginBuildingScrollFrame( state, aDocElement, styleContext, viewportFrame, rootPseudo, PR_TRUE, newFrame); nsIScrollableFrame* scrollable = do_QueryFrame(newFrame); NS_ENSURE_TRUE(scrollable, NS_ERROR_FAILURE); nsIScrollableView* scrollableView = scrollable->GetScrollableView(); NS_ENSURE_TRUE(scrollableView, NS_ERROR_FAILURE); viewManager->SetRootScrollableView(scrollableView); parentFrame = newFrame; mGfxScrollFrame = newFrame; } rootFrame->SetStyleContextWithoutNotification(rootPseudoStyle); rootFrame->Init(aDocElement, parentFrame, nsnull); if (isScrollable) { FinishBuildingScrollFrame(parentFrame, rootFrame); } if (isPaginated) { // paginated // Create the first page // Set the initial child lists nsIFrame *pageFrame, *canvasFrame; ConstructPageFrame(mPresShell, presContext, rootFrame, nsnull, pageFrame, canvasFrame); rootFrame->SetInitialChildList(nsnull, pageFrame); // The eventual parent of the document element frame. // XXX should this be set for every new page (in ConstructPageFrame)? mDocElementContainingBlock = canvasFrame; mHasRootAbsPosContainingBlock = PR_TRUE; } viewportFrame->SetInitialChildList(nsnull, newFrame); *aNewFrame = viewportFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructPageFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aParentFrame, nsIFrame* aPrevPageFrame, nsIFrame*& aPageFrame, nsIFrame*& aCanvasFrame) { nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext(); nsStyleSet *styleSet = aPresShell->StyleSet(); nsRefPtr pagePseudoStyle; pagePseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::page, parentStyleContext); aPageFrame = NS_NewPageFrame(aPresShell, pagePseudoStyle); if (NS_UNLIKELY(!aPageFrame)) return NS_ERROR_OUT_OF_MEMORY; // Initialize the page frame and force it to have a view. This makes printing of // the pages easier and faster. aPageFrame->Init(nsnull, aParentFrame, aPrevPageFrame); nsRefPtr pageContentPseudoStyle; pageContentPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::pageContent, pagePseudoStyle); nsIFrame* pageContentFrame = NS_NewPageContentFrame(aPresShell, pageContentPseudoStyle); if (NS_UNLIKELY(!pageContentFrame)) return NS_ERROR_OUT_OF_MEMORY; // Initialize the page content frame and force it to have a view. Also make it the // containing block for fixed elements which are repeated on every page. nsIFrame* prevPageContentFrame = nsnull; if (aPrevPageFrame) { prevPageContentFrame = aPrevPageFrame->GetFirstChild(nsnull); NS_ASSERTION(prevPageContentFrame, "missing page content frame"); } pageContentFrame->Init(nsnull, aPageFrame, prevPageContentFrame); aPageFrame->SetInitialChildList(nsnull, pageContentFrame); mFixedContainingBlock = pageContentFrame; nsRefPtr canvasPseudoStyle; canvasPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::canvas, pageContentPseudoStyle); aCanvasFrame = NS_NewCanvasFrame(aPresShell, canvasPseudoStyle); if (NS_UNLIKELY(!aCanvasFrame)) return NS_ERROR_OUT_OF_MEMORY; nsIFrame* prevCanvasFrame = nsnull; if (prevPageContentFrame) { prevCanvasFrame = prevPageContentFrame->GetFirstChild(nsnull); NS_ASSERTION(prevCanvasFrame, "missing canvas frame"); } aCanvasFrame->Init(nsnull, pageContentFrame, prevCanvasFrame); pageContentFrame->SetInitialChildList(nsnull, aCanvasFrame); return NS_OK; } /* static */ nsresult nsCSSFrameConstructor::CreatePlaceholderFrameFor(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsIFrame* aParentFrame, nsIFrame* aPrevInFlow, nsIFrame** aPlaceholderFrame) { nsRefPtr placeholderStyle = aPresShell->StyleSet()-> ResolveStyleForNonElement(aStyleContext->GetParent()); // The placeholder frame gets a pseudo style context nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)NS_NewPlaceholderFrame(aPresShell, placeholderStyle); if (placeholderFrame) { placeholderFrame->Init(aContent, aParentFrame, aPrevInFlow); // The placeholder frame has a pointer back to the out-of-flow frame placeholderFrame->SetOutOfFlowFrame(aFrame); aFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); // Add mapping from absolutely positioned frame to its placeholder frame aPresShell->FrameManager()->RegisterPlaceholderFrame(placeholderFrame); *aPlaceholderFrame = static_cast(placeholderFrame); return NS_OK; } else { return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::ConstructButtonFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { *aNewFrame = nsnull; nsIFrame* buttonFrame = nsnull; nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; if (nsGkAtoms::button == aItem.mTag) { buttonFrame = NS_NewHTMLButtonControlFrame(mPresShell, styleContext); } else { buttonFrame = NS_NewGfxButtonControlFrame(mPresShell, styleContext); } if (NS_UNLIKELY(!buttonFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize the button frame nsresult rv = InitAndRestoreFrame(aState, content, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, buttonFrame); if (NS_FAILED(rv)) { buttonFrame->Destroy(); return rv; } // See if we need to create a view nsHTMLContainerFrame::CreateViewForFrame(buttonFrame, PR_FALSE); nsRefPtr innerBlockContext; innerBlockContext = mPresShell->StyleSet()->ResolvePseudoStyleFor(content, nsCSSAnonBoxes::buttonContent, styleContext); nsIFrame* blockFrame = NS_NewBlockFrame(mPresShell, innerBlockContext, NS_BLOCK_FLOAT_MGR); if (NS_UNLIKELY(!blockFrame)) { buttonFrame->Destroy(); return NS_ERROR_OUT_OF_MEMORY; } rv = InitAndRestoreFrame(aState, content, buttonFrame, nsnull, blockFrame); if (NS_FAILED(rv)) { blockFrame->Destroy(); buttonFrame->Destroy(); return rv; } rv = aState.AddChild(buttonFrame, aFrameItems, content, styleContext, aParentFrame); if (NS_FAILED(rv)) { blockFrame->Destroy(); buttonFrame->Destroy(); return rv; } PRBool isLeaf = buttonFrame->IsLeaf(); #ifdef DEBUG // Make sure that we're an anonymous content creator exactly when we're a // leaf nsIAnonymousContentCreator* creator = do_QueryFrame(buttonFrame); NS_ASSERTION(!creator == !isLeaf, "Should be creator exactly when we're a leaf"); #endif if (!isLeaf) { // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (aStyleDisplay->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned aState.PushAbsoluteContainingBlock(blockFrame, absoluteSaveState); } #ifdef DEBUG // Make sure that anonymous child creation will have no effect in this case nsIAnonymousContentCreator* creator = do_QueryFrame(blockFrame); NS_ASSERTION(!creator, "Shouldn't be an anonymous content creator!"); #endif rv = ProcessChildren(aState, content, styleContext, blockFrame, PR_TRUE, childItems, aStyleDisplay->IsBlockOutside()); if (NS_FAILED(rv)) return rv; // Set the areas frame's initial child lists blockFrame->SetInitialChildList(nsnull, childItems.childList); } buttonFrame->SetInitialChildList(nsnull, blockFrame); if (isLeaf) { nsFrameItems anonymousChildItems; // if there are any anonymous children create frames for them. Note that // we're doing this using a different parent frame from the one we pass to // ProcessChildren! CreateAnonymousFrames(aState, content, buttonFrame, anonymousChildItems); if (anonymousChildItems.childList) { // the anonymous content is already parented to the area frame aState.mFrameManager->AppendFrames(blockFrame, nsnull, anonymousChildItems.childList); } } // our new button frame returned is the top frame. *aNewFrame = buttonFrame; return NS_OK; } nsresult nsCSSFrameConstructor::ConstructSelectFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsresult rv = NS_OK; const PRInt32 kNoSizeSpecified = -1; nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; // Construct a frame-based listbox or combobox nsCOMPtr sel(do_QueryInterface(content)); PRInt32 size = 1; if (sel) { sel->GetSize(&size); PRBool multipleSelect = PR_FALSE; sel->GetMultiple(&multipleSelect); // Construct a combobox if size=1 or no size is specified and its multiple select if (((1 == size || 0 == size) || (kNoSizeSpecified == size)) && (PR_FALSE == multipleSelect)) { // Construct a frame-based combo box. // The frame-based combo box is built out of three parts. A display area, a button and // a dropdown list. The display area and button are created through anonymous content. // The drop-down list's frame is created explicitly. The combobox frame shares its content // with the drop-down list. PRUint32 flags = NS_BLOCK_FLOAT_MGR; nsIFrame* comboboxFrame = NS_NewComboboxControlFrame(mPresShell, styleContext, flags); // Save the history state so we don't restore during construction // since the complete tree is required before we restore. nsILayoutHistoryState *historyState = aState.mFrameState; aState.mFrameState = nsnull; // Initialize the combobox frame InitAndRestoreFrame(aState, content, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, comboboxFrame); nsHTMLContainerFrame::CreateViewForFrame(comboboxFrame, PR_FALSE); rv = aState.AddChild(comboboxFrame, aFrameItems, content, styleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } /////////////////////////////////////////////////////////////////// // Combobox - Old Native Implementation /////////////////////////////////////////////////////////////////// nsIComboboxControlFrame* comboBox = do_QueryFrame(comboboxFrame); NS_ASSERTION(comboBox, "NS_NewComboboxControlFrame returned frame that " "doesn't implement nsIComboboxControlFrame"); // Resolve pseudo element style for the dropdown list nsRefPtr listStyle; listStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(content, nsCSSAnonBoxes::dropDownList, styleContext); // Create a listbox nsIFrame* listFrame = NS_NewListControlFrame(mPresShell, listStyle); // Notify the listbox that it is being used as a dropdown list. nsIListControlFrame * listControlFrame = do_QueryFrame(listFrame); if (listControlFrame) { listControlFrame->SetComboboxFrame(comboboxFrame); } // Notify combobox that it should use the listbox as it's popup comboBox->SetDropDown(listFrame); NS_ASSERTION(!listStyle->GetStyleDisplay()->IsPositioned(), "Ended up with positioned dropdown list somehow."); NS_ASSERTION(!listStyle->GetStyleDisplay()->IsFloating(), "Ended up with floating dropdown list somehow."); // Initialize the scroll frame positioned. Note that it is NOT // initialized as absolutely positioned. nsIFrame* scrolledFrame = NS_NewSelectsAreaFrame(mPresShell, styleContext, flags); InitializeSelectFrame(aState, listFrame, scrolledFrame, content, comboboxFrame, listStyle, PR_TRUE, aFrameItems); // Set flag so the events go to the listFrame not child frames. // XXX: We should replace this with a real widget manager similar // to how the nsFormControlFrame works. Re-directing events is a temporary Kludge. NS_ASSERTION(listFrame->GetView(), "ListFrame's view is nsnull"); //listFrame->GetView()->SetViewFlags(NS_VIEW_PUBLIC_FLAG_DONT_CHECK_CHILDREN); // Create display and button frames from the combobox's anonymous content. // The anonymous content is appended to existing anonymous content for this // element (the scrollbars). nsFrameItems childItems; CreateAnonymousFrames(aState, content, comboboxFrame, childItems); comboboxFrame->SetInitialChildList(nsnull, childItems.childList); // Initialize the additional popup child list which contains the // dropdown list frame. nsFrameItems popupItems; popupItems.AddChild(listFrame); comboboxFrame->SetInitialChildList(nsGkAtoms::selectPopupList, popupItems.childList); *aNewFrame = comboboxFrame; aState.mFrameState = historyState; if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for the entire subtree of |comboboxFrame|. aState.mFrameManager->RestoreFrameState(comboboxFrame, aState.mFrameState); } } else { /////////////////////////////////////////////////////////////////// // ListBox - Old Native Implementation /////////////////////////////////////////////////////////////////// nsIFrame* listFrame = NS_NewListControlFrame(mPresShell, styleContext); if (listFrame) { rv = NS_OK; } else { rv = NS_ERROR_OUT_OF_MEMORY; } nsIFrame* scrolledFrame = NS_NewSelectsAreaFrame( mPresShell, styleContext, NS_BLOCK_FLOAT_MGR); // ******* this code stolen from Initialze ScrollFrame ******** // please adjust this code to use BuildScrollFrame. InitializeSelectFrame(aState, listFrame, scrolledFrame, content, aParentFrame, styleContext, PR_FALSE, aFrameItems); *aNewFrame = listFrame; } } return rv; } /** * Used to be InitializeScrollFrame but now it's only used for the select tag * But the select tag should really be fixed to use GFX scrollbars that can * be create with BuildScrollFrame. */ nsresult nsCSSFrameConstructor::InitializeSelectFrame(nsFrameConstructorState& aState, nsIFrame* scrollFrame, nsIFrame* scrolledFrame, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, PRBool aBuildCombobox, nsFrameItems& aFrameItems) { const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); // Initialize it nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame); // We don't call InitAndRestoreFrame for scrollFrame because we can only // restore the frame state after its parts have been created (in particular, // the scrollable view). So we have to split Init and Restore. // Initialize the frame scrollFrame->Init(aContent, geometricParent, nsnull); if (!aBuildCombobox) { nsresult rv = aState.AddChild(scrollFrame, aFrameItems, aContent, aStyleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } } nsHTMLContainerFrame::CreateViewForFrame(scrollFrame, aBuildCombobox); if (aBuildCombobox) { // Give the drop-down list a popup widget nsIView* view = scrollFrame->GetView(); NS_ASSERTION(view, "We asked for a view but didn't get one"); if (view) { view->GetViewManager()->SetViewFloating(view, PR_TRUE); nsWidgetInitData widgetData; widgetData.mWindowType = eWindowType_popup; widgetData.mBorderStyle = eBorderStyle_default; #if defined(XP_MACOSX) || defined(XP_BEOS) static NS_DEFINE_IID(kCPopUpCID, NS_POPUP_CID); view->CreateWidget(kCPopUpCID, &widgetData, nsnull); #else static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID); view->CreateWidget(kCChildCID, &widgetData, nsnull); #endif } } BuildScrollFrame(aState, aContent, aStyleContext, scrolledFrame, geometricParent, scrollFrame); if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for the scroll frame aState.mFrameManager->RestoreFrameStateFor(scrollFrame, aState.mFrameState); } // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (display->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned aState.PushAbsoluteContainingBlock(scrolledFrame, absoluteSaveState); } ProcessChildren(aState, aContent, aStyleContext, scrolledFrame, PR_FALSE, childItems, PR_TRUE); // Set the scrolled frame's initial child lists scrolledFrame->SetInitialChildList(nsnull, childItems.childList); return NS_OK; } nsresult nsCSSFrameConstructor::ConstructFieldSetFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsIFrame* newFrame = NS_NewFieldSetFrame(mPresShell, styleContext); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // Initialize it InitAndRestoreFrame(aState, content, aState.GetGeometricParent(aStyleDisplay, aParentFrame), nsnull, newFrame); // See if we need to create a view, e.g. the frame is absolutely // positioned nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Resolve style and initialize the frame nsRefPtr fieldsetContentStyle; fieldsetContentStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(content, nsCSSAnonBoxes::fieldsetContent, styleContext); nsIFrame* blockFrame = NS_NewBlockFrame(mPresShell, fieldsetContentStyle, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); InitAndRestoreFrame(aState, content, newFrame, nsnull, blockFrame); nsresult rv = aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); if (NS_FAILED(rv)) { return rv; } // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; if (aStyleDisplay->IsPositioned()) { // The area frame becomes a container for child frames that are // absolutely positioned // XXXbz this is probably wrong, and once arbitrary frames can be absolute // containing blocks we should fix this.. aState.PushAbsoluteContainingBlock(blockFrame, absoluteSaveState); } ProcessChildren(aState, content, styleContext, blockFrame, PR_TRUE, childItems, PR_TRUE); nsIFrame * child = childItems.childList; nsIFrame * previous = nsnull; nsLegendFrame* legendFrame = nsnull; while (nsnull != child) { legendFrame = do_QueryFrame(child); if (legendFrame) { // We want the legend to be the first frame in the fieldset child list. // That way the EventStateManager will do the right thing when tabbing // from a selection point within the legend (bug 236071), which is // used for implementing legend access keys (bug 81481). // GetAdjustedParentFrame() below depends on this frame order. if (nsnull != previous) { previous->SetNextSibling(legendFrame->GetNextSibling()); } else { childItems.childList = legendFrame->GetNextSibling(); } legendFrame->SetNextSibling(blockFrame); legendFrame->SetParent(newFrame); break; } previous = child; child = child->GetNextSibling(); } // Set the scrolled frame's initial child lists blockFrame->SetInitialChildList(nsnull, childItems.childList); // Set the scroll frame's initial child list newFrame->SetInitialChildList(nsnull, legendFrame ? legendFrame : blockFrame); // our new frame returned is the top frame which is the list frame. *aNewFrame = newFrame; return NS_OK; } static nsIFrame* FindAncestorWithGeneratedContentPseudo(nsIFrame* aFrame) { for (nsIFrame* f = aFrame->GetParent(); f; f = f->GetParent()) { NS_ASSERTION(f->IsGeneratedContentFrame(), "should not have exited generated content"); nsIAtom* pseudo = f->GetStyleContext()->GetPseudoType(); if (pseudo == nsCSSPseudoElements::before || pseudo == nsCSSPseudoElements::after) return f; } return nsnull; } #define FCDATA_DECL(_flags, _func) \ { _flags, { (FrameCreationFunc)_func } } #define SIMPLE_FCDATA(_func) FCDATA_DECL(0, _func) #define FULL_CTOR_FCDATA(_flags, _func) \ { _flags | FCDATA_FUNC_IS_FULL_CTOR, { nsnull }, _func } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindTextData(nsIFrame* aParentFrame) { #ifdef MOZ_SVG if (aParentFrame && aParentFrame->IsFrameOfType(nsIFrame::eSVG)) { nsIFrame *ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { nsISVGTextContentMetrics* metrics = do_QueryFrame(ancestorFrame); if (metrics) { static const FrameConstructionData sSVGGlyphData = SIMPLE_FCDATA(NS_NewSVGGlyphFrame); return &sSVGGlyphData; } } return nsnull; } #endif static const FrameConstructionData sTextData = FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT, NS_NewTextFrame); return &sTextData; } nsresult nsCSSFrameConstructor::ConstructTextFrame(const FrameConstructionData* aData, nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems) { NS_PRECONDITION(aData, "Must have frame construction data"); nsIFrame* newFrame = (*aData->mFunc.mCreationFunc)(mPresShell, aStyleContext); if (NS_UNLIKELY(!newFrame)) return NS_ERROR_OUT_OF_MEMORY; nsresult rv = InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, newFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); return rv; } // We never need to create a view for a text frame. if (newFrame->IsGeneratedContentFrame()) { nsAutoPtr initializer; initializer = static_cast( aContent->UnsetProperty(nsGkAtoms::genConInitializerProperty)); if (initializer) { if (initializer->mNode->InitTextFrame(initializer->mList, FindAncestorWithGeneratedContentPseudo(newFrame), newFrame)) { (this->*(initializer->mDirtyAll))(); } initializer->mNode.forget(); } } // Add the newly constructed frame to the flow aFrameItems.AddChild(newFrame); // Text frames don't go in the content->frame hash table, because // they're anonymous. This keeps the hash table smaller return rv; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDataByInt(PRInt32 aInt, nsIContent* aContent, nsStyleContext* aStyleContext, const FrameConstructionDataByInt* aDataPtr, PRUint32 aDataLength) { for (const FrameConstructionDataByInt *curData = aDataPtr, *endData = aDataPtr + aDataLength; curData != endData; ++curData) { if (curData->mInt == aInt) { const FrameConstructionData* data = &curData->mData; if (data->mBits & FCDATA_FUNC_IS_DATA_GETTER) { return data->mFunc.mDataGetter(aContent, aStyleContext); } return data; } } return nsnull; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDataByTag(nsIAtom* aTag, nsIContent* aContent, nsStyleContext* aStyleContext, const FrameConstructionDataByTag* aDataPtr, PRUint32 aDataLength) { for (const FrameConstructionDataByTag *curData = aDataPtr, *endData = aDataPtr + aDataLength; curData != endData; ++curData) { if (*curData->mTag == aTag) { const FrameConstructionData* data = &curData->mData; if (data->mBits & FCDATA_FUNC_IS_DATA_GETTER) { return data->mFunc.mDataGetter(aContent, aStyleContext); } return data; } } return nsnull; } #define SUPPRESS_FCDATA() FCDATA_DECL(FCDATA_SUPPRESS_FRAME, nsnull) #define SIMPLE_INT_CREATE(_int, _func) { _int, SIMPLE_FCDATA(_func) } #define SIMPLE_INT_CHAIN(_int, _func) \ { _int, FCDATA_DECL(FCDATA_FUNC_IS_DATA_GETTER, _func) } #define COMPLEX_INT_CREATE(_int, _func) \ { _int, FULL_CTOR_FCDATA(0, _func) } #define SIMPLE_TAG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_FCDATA(_func) } #define SIMPLE_TAG_CHAIN(_tag, _func) \ { &nsGkAtoms::_tag, FCDATA_DECL(FCDATA_FUNC_IS_DATA_GETTER, _func) } #define COMPLEX_TAG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, FULL_CTOR_FCDATA(0, _func) } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindHTMLData(nsIContent* aContent, nsIAtom* aTag, PRInt32 aNameSpaceID, nsIFrame* aParentFrame, nsStyleContext* aStyleContext) { // Ignore the tag if it's not HTML content and if it doesn't extend (via XBL) // a valid HTML namespace. This check must match the one in // ShouldHaveFirstLineStyle. if (!aContent->IsNodeOfType(nsINode::eHTML) && aNameSpaceID != kNameSpaceID_XHTML) { return nsnull; } NS_ASSERTION(!aParentFrame || aParentFrame->GetStyleContext()->GetPseudoType() != nsCSSAnonBoxes::fieldsetContent || aParentFrame->GetParent()->GetType() == nsGkAtoms::fieldSetFrame, "Unexpected parent for fieldset content anon box"); if (aTag == nsGkAtoms::legend && (!aParentFrame || (aParentFrame->GetType() != nsGkAtoms::fieldSetFrame && aParentFrame->GetStyleContext()->GetPseudoType() != nsCSSAnonBoxes::fieldsetContent))) { // is only special inside fieldset frames // XXXbz it would be nice if we could just decide this based on the parent // tag, and hence just use a SIMPLE_TAG_CHAIN for legend below, but the // fact that with XBL we could end up with this legend element in some // totally weird insertion point makes that chancy, I think. return nsnull; } static const FrameConstructionDataByTag sHTMLData[] = { SIMPLE_TAG_CHAIN(img, nsCSSFrameConstructor::FindImgData), SIMPLE_TAG_CHAIN(mozgeneratedcontentimage, nsCSSFrameConstructor::FindImgData), { &nsGkAtoms::br, FCDATA_DECL(FCDATA_SKIP_FRAMEMAP | FCDATA_IS_LINE_PARTICIPANT, NS_NewBRFrame) }, SIMPLE_TAG_CREATE(wbr, NS_NewWBRFrame), SIMPLE_TAG_CHAIN(input, nsCSSFrameConstructor::FindInputData), SIMPLE_TAG_CREATE(textarea, NS_NewTextControlFrame), COMPLEX_TAG_CREATE(select, &nsCSSFrameConstructor::ConstructSelectFrame), SIMPLE_TAG_CHAIN(object, nsCSSFrameConstructor::FindObjectData), SIMPLE_TAG_CHAIN(applet, nsCSSFrameConstructor::FindObjectData), SIMPLE_TAG_CHAIN(embed, nsCSSFrameConstructor::FindObjectData), COMPLEX_TAG_CREATE(fieldset, &nsCSSFrameConstructor::ConstructFieldSetFrame), SIMPLE_TAG_CREATE(legend, NS_NewLegendFrame), SIMPLE_TAG_CREATE(frameset, NS_NewHTMLFramesetFrame), SIMPLE_TAG_CREATE(iframe, NS_NewSubDocumentFrame), SIMPLE_TAG_CREATE(spacer, NS_NewSpacerFrame), COMPLEX_TAG_CREATE(button, &nsCSSFrameConstructor::ConstructButtonFrame), SIMPLE_TAG_CREATE(canvas, NS_NewHTMLCanvasFrame), #if defined(MOZ_MEDIA) SIMPLE_TAG_CREATE(video, NS_NewHTMLVideoFrame), SIMPLE_TAG_CREATE(audio, NS_NewHTMLVideoFrame), #endif SIMPLE_TAG_CREATE(isindex, NS_NewIsIndexFrame) }; return FindDataByTag(aTag, aContent, aStyleContext, sHTMLData, NS_ARRAY_LENGTH(sHTMLData)); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindImgData(nsIContent* aContent, nsStyleContext* aStyleContext) { if (!nsImageFrame::ShouldCreateImageFrameFor(aContent, aStyleContext)) { return nsnull; } static const FrameConstructionData sImgData = SIMPLE_FCDATA(NS_NewImageFrame); return &sImgData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindImgControlData(nsIContent* aContent, nsStyleContext* aStyleContext) { if (!nsImageFrame::ShouldCreateImageFrameFor(aContent, aStyleContext)) { return nsnull; } static const FrameConstructionData sImgControlData = SIMPLE_FCDATA(NS_NewImageControlFrame); return &sImgControlData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindInputData(nsIContent* aContent, nsStyleContext* aStyleContext) { static const FrameConstructionDataByInt sInputData[] = { SIMPLE_INT_CREATE(NS_FORM_INPUT_CHECKBOX, NS_NewGfxCheckboxControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_RADIO, NS_NewGfxRadioControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_FILE, NS_NewFileControlFrame), SIMPLE_INT_CHAIN(NS_FORM_INPUT_IMAGE, nsCSSFrameConstructor::FindImgControlData), SIMPLE_INT_CREATE(NS_FORM_INPUT_TEXT, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_PASSWORD, NS_NewTextControlFrame), COMPLEX_INT_CREATE(NS_FORM_INPUT_SUBMIT, &nsCSSFrameConstructor::ConstructButtonFrame), COMPLEX_INT_CREATE(NS_FORM_INPUT_RESET, &nsCSSFrameConstructor::ConstructButtonFrame), COMPLEX_INT_CREATE(NS_FORM_INPUT_BUTTON, &nsCSSFrameConstructor::ConstructButtonFrame) // Keeping hidden inputs out of here on purpose for so they get frames by // display (in practice, none). }; nsCOMPtr control = do_QueryInterface(aContent); NS_ASSERTION(control, "input doesn't implement nsIFormControl?"); return FindDataByInt(control->GetType(), aContent, aStyleContext, sInputData, NS_ARRAY_LENGTH(sInputData)); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindObjectData(nsIContent* aContent, nsStyleContext* aStyleContext) { // GetDisplayedType isn't necessarily nsIObjectLoadingContent::TYPE_NULL for // cases when the object is broken/suppressed/etc (e.g. a broken image), but // we want to treat those cases as TYPE_NULL PRUint32 type; if (aContent->IntrinsicState() & (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED)) { type = nsIObjectLoadingContent::TYPE_NULL; } else { nsCOMPtr objContent(do_QueryInterface(aContent)); NS_ASSERTION(objContent, "applet, embed and object must implement " "nsIObjectLoadingContent!"); objContent->GetDisplayedType(&type); } static const FrameConstructionDataByInt sObjectData[] = { SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_LOADING, NS_NewEmptyFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_PLUGIN, NS_NewObjectFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_IMAGE, NS_NewImageFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_DOCUMENT, NS_NewSubDocumentFrame) // Nothing for TYPE_NULL so we'll construct frames by display there }; return FindDataByInt((PRInt32)type, aContent, aStyleContext, sObjectData, NS_ARRAY_LENGTH(sObjectData)); } nsresult nsCSSFrameConstructor::ConstructFrameFromItemInternal(FrameConstructionItem& aItem, nsFrameConstructorState& aState, nsIFrame* aParentFrame, nsFrameItems& aFrameItems) { const FrameConstructionData* data = aItem.mFCData; NS_ASSERTION(data, "Must have frame construction data"); PRUint32 bits = data->mBits; NS_ASSERTION(!(bits & FCDATA_FUNC_IS_DATA_GETTER), "Should have dealt with this inside the data finder"); // Some sets of bits are not compatible with each other #define CHECK_ONLY_ONE_BIT(_bit1, _bit2) \ NS_ASSERTION(!(bits & _bit1) || !(bits & _bit2), \ "Only one of these bits should be set") CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_FORCE_NULL_ABSPOS_CONTAINER); #ifdef MOZ_MATHML CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_WRAP_KIDS_IN_BLOCKS); #endif CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_MAY_NEED_SCROLLFRAME); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_IS_POPUP); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_SKIP_ABSPOS_PUSH); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_FORCE_VIEW); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_DISALLOW_GENERATED_CONTENT); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_ALLOW_BLOCK_STYLES); CHECK_ONLY_ONE_BIT(FCDATA_MAY_NEED_SCROLLFRAME, FCDATA_FORCE_VIEW); #undef CHECK_ONLY_ONE_BIT nsStyleContext* const styleContext = aItem.mStyleContext; const nsStyleDisplay* display = styleContext->GetStyleDisplay(); nsIFrame* newFrame; if (bits & FCDATA_FUNC_IS_FULL_CTOR) { nsresult rv = (this->*(data->mFullConstructor))(aState, aItem, aParentFrame, display, aFrameItems, &newFrame); if (NS_FAILED(rv)) { return rv; } } else { nsIContent* const content = aItem.mContent; newFrame = (*data->mFunc.mCreationFunc)(mPresShell, styleContext); if (!newFrame) { return NS_ERROR_OUT_OF_MEMORY; } PRBool allowOutOfFlow = !(bits & FCDATA_DISALLOW_OUT_OF_FLOW); PRBool isPopup = aItem.mIsPopup; NS_ASSERTION(!isPopup || (aState.mPopupItems.containingBlock && aState.mPopupItems.containingBlock->GetType() == nsGkAtoms::popupSetFrame), "Should have a containing block here!"); nsIFrame* geometricParent = isPopup ? aState.mPopupItems.containingBlock : (allowOutOfFlow ? aState.GetGeometricParent(display, aParentFrame) : aParentFrame); nsresult rv = NS_OK; // Must init frameToAddToList to null, since it's inout nsIFrame* frameToAddToList = nsnull; if ((bits & FCDATA_MAY_NEED_SCROLLFRAME) && display->IsScrollableOverflow()) { BuildScrollFrame(aState, content, styleContext, newFrame, geometricParent, frameToAddToList); // No need to add to frame map later, since BuildScrollFrame did it // already bits |= FCDATA_SKIP_FRAMEMAP; } else { rv = InitAndRestoreFrame(aState, content, geometricParent, nsnull, newFrame); NS_ASSERTION(NS_SUCCEEDED(rv), "InitAndRestoreFrame failed"); // See whether we need to create a view nsHTMLContainerFrame::CreateViewForFrame(newFrame, (bits & FCDATA_FORCE_VIEW) != 0); frameToAddToList = newFrame; } rv = aState.AddChild(frameToAddToList, aFrameItems, content, styleContext, aParentFrame, allowOutOfFlow, allowOutOfFlow, isPopup); if (NS_FAILED(rv)) { return rv; } #ifdef MOZ_XUL // Icky XUL stuff, sadly if (aItem.mIsRootPopupgroup) { NS_ASSERTION(nsIRootBox::GetRootBox(mPresShell) && nsIRootBox::GetRootBox(mPresShell)->GetPopupSetFrame() == newFrame, "Unexpected PopupSetFrame"); aState.mPopupItems.containingBlock = newFrame; aState.mHavePendingPopupgroup = PR_FALSE; } #endif /* MOZ_XUL */ // Process the child content if requested nsFrameItems childItems; nsFrameConstructorSaveState absoluteSaveState; if (bits & FCDATA_FORCE_NULL_ABSPOS_CONTAINER) { aState.PushAbsoluteContainingBlock(nsnull, absoluteSaveState); } else if (!(bits & FCDATA_SKIP_ABSPOS_PUSH) && display->IsPositioned()) { aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState); } if (bits & FCDATA_USE_CHILD_ITEMS) { rv = ConstructFramesFromItemList(aState, aItem.mChildItems, newFrame, childItems); } else { // Process the child frames. rv = ProcessChildren(aState, content, styleContext, newFrame, !(bits & FCDATA_DISALLOW_GENERATED_CONTENT), childItems, (bits & FCDATA_ALLOW_BLOCK_STYLES) != 0); } #ifdef MOZ_XUL // More icky XUL stuff if (aItem.mNameSpaceID == kNameSpaceID_XUL && (aItem.mTag == nsGkAtoms::treechildren || // trees always need titletips content->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext) || content->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltip))) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) { rootBox->AddTooltipSupport(content); } } #endif #ifdef MOZ_MATHML if (NS_SUCCEEDED(rv) && (bits & FCDATA_WRAP_KIDS_IN_BLOCKS)) { nsFrameItems newItems; nsFrameItems currentBlock; nsIFrame* f; while ((f = childItems.childList) != nsnull) { PRBool wrapFrame = IsInlineFrame(f) || IsFrameSpecial(f); if (!wrapFrame) { rv = FlushAccumulatedBlock(aState, content, newFrame, ¤tBlock, &newItems); if (NS_FAILED(rv)) break; } childItems.RemoveChild(f, nsnull); if (wrapFrame) { currentBlock.AddChild(f); } else { newItems.AddChild(f); } } rv = FlushAccumulatedBlock(aState, content, newFrame, ¤tBlock, &newItems); if (childItems.childList) { // an error must have occurred, delete unprocessed frames CleanupFrameReferences(aState.mFrameManager, childItems.childList); nsFrameList(childItems.childList).DestroyFrames(); } childItems = newItems; } #endif // Set the frame's initial child list // Note that MathML depends on this being called even if // childItems.childList is null! newFrame->SetInitialChildList(nsnull, childItems.childList); } NS_ASSERTION(newFrame->IsFrameOfType(nsIFrame::eLineParticipant) == ((bits & FCDATA_IS_LINE_PARTICIPANT) != 0), "Incorrectly set FCDATA_IS_LINE_PARTICIPANT bits"); if (!(bits & FCDATA_SKIP_FRAMEMAP)) { aState.mFrameManager->SetPrimaryFrameFor(aItem.mContent, newFrame); } return NS_OK; } // after the node has been constructed and initialized create any // anonymous content a node needs. nsresult nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState, nsIContent* aParent, nsIFrame* aParentFrame, nsFrameItems& aChildItems) { nsAutoTArray newAnonymousItems; nsresult rv = GetAnonymousContent(aParent, aParentFrame, newAnonymousItems); NS_ENSURE_SUCCESS(rv, rv); PRUint32 count = newAnonymousItems.Length(); if (count == 0) { return NS_OK; } nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame); NS_ASSERTION(creator, "How can that happen if we have nodes to construct frames for?"); for (PRUint32 i=0; i < count; i++) { nsIContent* content = newAnonymousItems[i]; NS_ASSERTION(content, "null anonymous content?"); nsIFrame* newFrame = creator->CreateFrameFor(content); if (newFrame) { aChildItems.AddChild(newFrame); } else { // create the frame and attach it to our frame ConstructFrame(aState, content, aParentFrame, aChildItems); } } return NS_OK; } nsresult nsCSSFrameConstructor::GetAnonymousContent(nsIContent* aParent, nsIFrame* aParentFrame, nsTArray& aContent) { nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame); if (!creator) return NS_OK; nsresult rv = creator->CreateAnonymousContent(aContent); NS_ENSURE_SUCCESS(rv, rv); PRUint32 count = aContent.Length(); for (PRUint32 i=0; i < count; i++) { // get our child's content and set its parent to our content nsIContent* content = aContent[i]; NS_ASSERTION(content, "null anonymous content?"); #ifdef MOZ_SVG // least-surprise CSS binding until we do the SVG specified // cascading rules for - bug 265894 if (aParent && aParent->NodeInfo()->Equals(nsGkAtoms::use, kNameSpaceID_SVG)) { content->SetFlags(NODE_IS_ANONYMOUS); } else #endif { content->SetNativeAnonymous(); } rv = content->BindToTree(mDocument, aParent, aParent, PR_TRUE); if (NS_FAILED(rv)) { content->UnbindFromTree(); return rv; } } return NS_OK; } static PRBool IsXULDisplayType(const nsStyleDisplay* aDisplay) { return (aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX || #ifdef MOZ_XUL aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK || #endif aDisplay->mDisplay == NS_STYLE_DISPLAY_BOX #ifdef MOZ_XUL || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_STACK || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_GROUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_LINE || aDisplay->mDisplay == NS_STYLE_DISPLAY_DECK || aDisplay->mDisplay == NS_STYLE_DISPLAY_POPUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_GROUPBOX #endif ); } // XUL frames are not allowed to be out of flow. #define SIMPLE_XUL_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH, \ _func) #define SCROLLABLE_XUL_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH | \ FCDATA_MAY_NEED_SCROLLFRAME, _func) #define SIMPLE_XUL_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_XUL_FCDATA(_func) } #define SCROLLABLE_XUL_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SCROLLABLE_XUL_FCDATA(_func) } #define SIMPLE_XUL_INT_CREATE(_int, _func) \ { _int, SIMPLE_XUL_FCDATA(_func) } #define SCROLLABLE_XUL_INT_CREATE(_int, _func) \ { _int, SCROLLABLE_XUL_FCDATA(_func) } static nsIFrame* NS_NewGridBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aStyleContext) { nsCOMPtr layout; NS_NewGridLayout2(aPresShell, getter_AddRefs(layout)); if (!layout) { return nsnull; } return NS_NewBoxFrame(aPresShell, aStyleContext, PR_FALSE, layout); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULTagData(nsIContent* aContent, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext) { if (aNameSpaceID != kNameSpaceID_XUL) { return nsnull; } static const FrameConstructionDataByTag sXULTagData[] = { #ifdef MOZ_XUL SCROLLABLE_XUL_CREATE(button, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(checkbox, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(radio, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(autorepeatbutton, NS_NewAutoRepeatBoxFrame), SCROLLABLE_XUL_CREATE(titlebar, NS_NewTitleBarFrame), SCROLLABLE_XUL_CREATE(resizer, NS_NewResizerFrame), SIMPLE_XUL_CREATE(image, NS_NewImageBoxFrame), SIMPLE_XUL_CREATE(spring, NS_NewLeafBoxFrame), SIMPLE_XUL_CREATE(spacer, NS_NewLeafBoxFrame), SIMPLE_XUL_CREATE(treechildren, NS_NewTreeBodyFrame), SIMPLE_XUL_CREATE(treecol, NS_NewTreeColFrame), SIMPLE_XUL_CREATE(text, NS_NewTextBoxFrame), SIMPLE_TAG_CHAIN(label, nsCSSFrameConstructor::FindXULLabelData), SIMPLE_TAG_CHAIN(description, nsCSSFrameConstructor::FindXULDescriptionData), SIMPLE_XUL_CREATE(menu, NS_NewMenuFrame), SIMPLE_XUL_CREATE(menubutton, NS_NewMenuFrame), SIMPLE_XUL_CREATE(menuitem, NS_NewMenuItemFrame), #ifdef XP_MACOSX SIMPLE_TAG_CHAIN(menubar, nsCSSFrameConstructor::FindXULMenubarData), #else SIMPLE_XUL_CREATE(menubar, NS_NewMenuBarFrame), #endif /* XP_MACOSX */ SIMPLE_TAG_CHAIN(popupgroup, nsCSSFrameConstructor::FindPopupGroupData), SIMPLE_XUL_CREATE(iframe, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(editor, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(browser, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(progressmeter, NS_NewProgressMeterFrame), SIMPLE_XUL_CREATE(splitter, NS_NewSplitterFrame), SIMPLE_TAG_CHAIN(listboxbody, nsCSSFrameConstructor::FindXULListBoxBodyData), SIMPLE_TAG_CHAIN(listitem, nsCSSFrameConstructor::FindXULListItemData), #endif /* MOZ_XUL */ SIMPLE_XUL_CREATE(slider, NS_NewSliderFrame), SIMPLE_XUL_CREATE(scrollbar, NS_NewScrollbarFrame), SIMPLE_XUL_CREATE(scrollbarbutton, NS_NewScrollbarButtonFrame) }; return FindDataByTag(aTag, aContent, aStyleContext, sXULTagData, NS_ARRAY_LENGTH(sXULTagData)); } #ifdef MOZ_XUL /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindPopupGroupData(nsIContent* aContent, nsStyleContext* /* unused */) { if (!aContent->IsRootOfNativeAnonymousSubtree()) { return nsnull; } static const FrameConstructionData sPopupSetData = SIMPLE_XUL_FCDATA(NS_NewPopupSetFrame); return &sPopupSetData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData nsCSSFrameConstructor::sXULTextBoxData = SIMPLE_XUL_FCDATA(NS_NewTextBoxFrame); /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULLabelData(nsIContent* aContent, nsStyleContext* /* unused */) { if (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { return &sXULTextBoxData; } static const FrameConstructionData sLabelData = SIMPLE_XUL_FCDATA(NS_NewXULLabelFrame); return &sLabelData; } static nsIFrame* NS_NewXULDescriptionFrame(nsIPresShell* aPresShell, nsStyleContext *aContext) { // XXXbz do we really need to set those flags? If the parent is not // a block we'll get them anyway, and if it is, do we want them? return NS_NewBlockFrame(aPresShell, aContext, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULDescriptionData(nsIContent* aContent, nsStyleContext* /* unused */) { if (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { return &sXULTextBoxData; } static const FrameConstructionData sDescriptionData = SIMPLE_XUL_FCDATA(NS_NewXULDescriptionFrame); return &sDescriptionData; } #ifdef XP_MACOSX /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULMenubarData(nsIContent* aContent, nsStyleContext* aStyleContext) { nsCOMPtr container = aStyleContext->PresContext()->GetContainer(); if (container) { nsCOMPtr treeItem(do_QueryInterface(container)); if (treeItem) { PRInt32 type; treeItem->GetItemType(&type); if (nsIDocShellTreeItem::typeChrome == type) { nsCOMPtr parent; treeItem->GetParent(getter_AddRefs(parent)); if (!parent) { // This is the root. Suppress the menubar, since on Mac // window menus are not attached to the window. static const FrameConstructionData sSuppressData = SUPPRESS_FCDATA(); return &sSuppressData; } } } } static const FrameConstructionData sMenubarData = SIMPLE_XUL_FCDATA(NS_NewMenuBarFrame); return &sMenubarData; } #endif /* XP_MACOSX */ /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULListBoxBodyData(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aStyleContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_GRID_GROUP) { return nsnull; } static const FrameConstructionData sListBoxBodyData = SCROLLABLE_XUL_FCDATA(NS_NewListBoxBodyFrame); return &sListBoxBodyData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULListItemData(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aStyleContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_GRID_LINE) { return nsnull; } static const FrameConstructionData sListItemData = SCROLLABLE_XUL_FCDATA(NS_NewListItemFrame); return &sListItemData; } #endif /* MOZ_XUL */ /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULDisplayData(const nsStyleDisplay* aDisplay, nsIContent* aContent, nsStyleContext* aStyleContext) { static const FrameConstructionDataByInt sXULDisplayData[] = { SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_BOX, NS_NewBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_BOX, NS_NewBoxFrame), #ifdef MOZ_XUL SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_GRID, NS_NewGridBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_GRID, NS_NewGridBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_GRID_GROUP, NS_NewGridRowGroupFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_GRID_LINE, NS_NewGridRowLeafFrame), SIMPLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_DECK, NS_NewDeckFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_GROUPBOX, NS_NewGroupBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_STACK, NS_NewStackFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_STACK, NS_NewStackFrame), { NS_STYLE_DISPLAY_POPUP, FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_IS_POPUP | FCDATA_SKIP_ABSPOS_PUSH, NS_NewMenuPopupFrame) } #endif /* MOZ_XUL */ }; // Processing by display here: return FindDataByInt(aDisplay->mDisplay, aContent, aStyleContext, sXULDisplayData, NS_ARRAY_LENGTH(sXULDisplayData)); } nsresult nsCSSFrameConstructor::AddLazyChildren(nsIContent* aContent, nsLazyFrameConstructionCallback* aCallback, void* aArg, PRBool aIsSynch) { nsCOMPtr event = new LazyGenerateChildrenEvent(aContent, mPresShell, aCallback, aArg); return aIsSynch ? event->Run() : NS_DispatchToCurrentThread(event); } already_AddRefed nsCSSFrameConstructor::BeginBuildingScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsIFrame* aParentFrame, nsIAtom* aScrolledPseudo, PRBool aIsRoot, nsIFrame*& aNewFrame) { nsIFrame* gfxScrollFrame = aNewFrame; nsFrameItems anonymousItems; nsRefPtr contentStyle = aContentStyle; if (!gfxScrollFrame) { // Build a XULScrollFrame when the child is a box, otherwise an // HTMLScrollFrame // XXXbz this is the lone remaining consumer of IsXULDisplayType. // I wonder whether we can eliminate that somehow. if (IsXULDisplayType(aContentStyle->GetStyleDisplay())) { gfxScrollFrame = NS_NewXULScrollFrame(mPresShell, contentStyle, aIsRoot); } else { gfxScrollFrame = NS_NewHTMLScrollFrame(mPresShell, contentStyle, aIsRoot); } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, gfxScrollFrame); // Create a view nsHTMLContainerFrame::CreateViewForFrame(gfxScrollFrame, PR_FALSE); } // if there are any anonymous children for the scroll frame, create // frames for them. CreateAnonymousFrames(aState, aContent, gfxScrollFrame, anonymousItems); aNewFrame = gfxScrollFrame; // we used the style that was passed in. So resolve another one. nsStyleSet *styleSet = mPresShell->StyleSet(); nsStyleContext* aScrolledChildStyle = styleSet->ResolvePseudoStyleFor(aContent, aScrolledPseudo, contentStyle).get(); if (gfxScrollFrame) { gfxScrollFrame->SetInitialChildList(nsnull, anonymousItems.childList); } return aScrolledChildStyle; } void nsCSSFrameConstructor::FinishBuildingScrollFrame(nsIFrame* aScrollFrame, nsIFrame* aScrolledFrame) { aScrollFrame->AppendFrames(nsnull, aScrolledFrame); // force the scrolled frame to have a view. The view will be parented to // the correct anonymous inner view because the scrollframes override // nsIFrame::GetParentViewForChildFrame. nsHTMLContainerFrame::CreateViewForFrame(aScrolledFrame, PR_TRUE); // XXXbz what's the point of the code after this in this method? nsIView* view = aScrolledFrame->GetView(); if (!view) return; } /** * Called to wrap a gfx scrollframe around a frame. The hierarchy will look like this * * ------- for gfx scrollbars ------ * * * ScrollFrame * ^ * | * Frame (scrolled frame you passed in) * * *----------------------------------- * LEGEND: * * ScrollFrame: This is a frame that manages gfx cross platform frame based scrollbars. * * @param aContent the content node of the child to wrap. * @param aScrolledFrame The frame of the content to wrap. This should not be * Initialized. This method will initialize it with a scrolled pseudo * and no nsIContent. The content will be attached to the scrollframe * returned. * @param aContentStyle the style context that has already been resolved for the content being passed in. * * @param aParentFrame The parent to attach the scroll frame to * * @param aNewFrame The new scrollframe or gfx scrollframe that we create. It will contain the * scrolled frame you passed in. (returned) * If this is not null, we'll just use it * @param aScrolledContentStyle the style that was resolved for the scrolled frame. (returned) */ nsresult nsCSSFrameConstructor::BuildScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsIFrame* aScrolledFrame, nsIFrame* aParentFrame, nsIFrame*& aNewFrame) { nsRefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, aContent, aContentStyle, aParentFrame, nsCSSAnonBoxes::scrolledContent, PR_FALSE, aNewFrame); aScrolledFrame->SetStyleContextWithoutNotification(scrolledContentStyle); InitAndRestoreFrame(aState, aContent, aNewFrame, nsnull, aScrolledFrame); FinishBuildingScrollFrame(aNewFrame, aScrolledFrame); // now set the primary frame to the ScrollFrame aState.mFrameManager->SetPrimaryFrameFor( aContent, aNewFrame ); return NS_OK; } const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDisplayData(const nsStyleDisplay* aDisplay, nsIContent* aContent, nsStyleContext* aStyleContext) { PR_STATIC_ASSERT(eParentTypeCount < (1 << (32 - FCDATA_PARENT_TYPE_OFFSET))); // The style system ensures that floated and positioned frames are // block-level. NS_ASSERTION(!(aDisplay->IsFloating() || aDisplay->IsAbsolutelyPositioned()) || aDisplay->IsBlockOutside(), "Style system did not apply CSS2.1 section 9.7 fixups"); // If this is "body", try propagating its scroll style to the viewport // Note that we need to do this even if the body is NOT scrollable; // it might have dynamically changed from scrollable to not scrollable, // and that might need to be propagated. // XXXbz is this the right place to do this? If this code moves, // make this function static. PRBool propagatedScrollToViewport = PR_FALSE; if (aContent->NodeInfo()->Equals(nsGkAtoms::body) && aContent->IsNodeOfType(nsINode::eHTML)) { propagatedScrollToViewport = PropagateScrollToViewport() == aContent; } // If the frame is a block-level frame and is scrollable, then wrap it // in a scroll frame. // XXX Ignore tables for the time being // XXXbz it would be nice to combine this with the other block // case... Think about how do do this? if (aDisplay->IsBlockInside() && aDisplay->IsScrollableOverflow() && !propagatedScrollToViewport) { static const FrameConstructionData sScrollableBlockData = FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructScrollableBlock); return &sScrollableBlockData; } // Handle various non-scrollable blocks if (aDisplay->IsBlockInside() || NS_STYLE_DISPLAY_RUN_IN == aDisplay->mDisplay || NS_STYLE_DISPLAY_COMPACT == aDisplay->mDisplay) { static const FrameConstructionData sNonScrollableBlockData = FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructNonScrollableBlock); return &sNonScrollableBlockData; } static const FrameConstructionDataByInt sDisplayData[] = { // To keep the hash table small don't add inline frames (they're // typically things like FONT and B), because we can quickly // find them if we need to. // XXXbz the "quickly" part is a bald-faced lie! { NS_STYLE_DISPLAY_INLINE, FULL_CTOR_FCDATA(FCDATA_SKIP_FRAMEMAP | FCDATA_IS_INLINE | FCDATA_IS_LINE_PARTICIPANT, &nsCSSFrameConstructor::ConstructInline) }, { NS_STYLE_DISPLAY_MARKER, FULL_CTOR_FCDATA(FCDATA_SKIP_FRAMEMAP | FCDATA_IS_INLINE | FCDATA_IS_LINE_PARTICIPANT, &nsCSSFrameConstructor::ConstructInline) }, { NS_STYLE_DISPLAY_TABLE, FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructTable) }, { NS_STYLE_DISPLAY_INLINE_TABLE, FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructTable) }, { NS_STYLE_DISPLAY_TABLE_CAPTION, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_ALLOW_BLOCK_STYLES | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableCaptionFrame) }, { NS_STYLE_DISPLAY_TABLE_ROW_GROUP, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_MAY_NEED_SCROLLFRAME | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableRowGroupFrame) }, { NS_STYLE_DISPLAY_TABLE_HEADER_GROUP, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_MAY_NEED_SCROLLFRAME | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableRowGroupFrame) }, { NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_MAY_NEED_SCROLLFRAME | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableRowGroupFrame) }, { NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableColGroupFrame) }, { NS_STYLE_DISPLAY_TABLE_COLUMN, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeColGroup), &nsCSSFrameConstructor::ConstructTableCol) }, { NS_STYLE_DISPLAY_TABLE_ROW, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRowGroup), &nsCSSFrameConstructor::ConstructTableRow) }, { NS_STYLE_DISPLAY_TABLE_CELL, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRow), &nsCSSFrameConstructor::ConstructTableCell) } }; return FindDataByInt(aDisplay->mDisplay, aContent, aStyleContext, sDisplayData, NS_ARRAY_LENGTH(sDisplayData)); } nsresult nsCSSFrameConstructor::ConstructScrollableBlock(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; *aNewFrame = nsnull; nsRefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, content, styleContext, aState.GetGeometricParent(aDisplay, aParentFrame), nsCSSAnonBoxes::scrolledContent, PR_FALSE, *aNewFrame); // Create our block frame // pass a temporary stylecontext, the correct one will be set later nsIFrame* scrolledFrame = NS_NewBlockFormattingContext(mPresShell, styleContext); nsFrameItems blockItem; nsresult rv = ConstructBlock(aState, scrolledContentStyle->GetStyleDisplay(), content, *aNewFrame, *aNewFrame, scrolledContentStyle, &scrolledFrame, blockItem, aDisplay->IsPositioned()); if (NS_UNLIKELY(NS_FAILED(rv))) { // XXXbz any cleanup needed here? return rv; } NS_ASSERTION(blockItem.childList == scrolledFrame, "Scrollframe's frameItems should be exactly the scrolled frame"); FinishBuildingScrollFrame(*aNewFrame, scrolledFrame); rv = aState.AddChild(*aNewFrame, aFrameItems, content, styleContext, aParentFrame); return rv; } nsresult nsCSSFrameConstructor::ConstructNonScrollableBlock(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsStyleContext* const styleContext = aItem.mStyleContext; if (aDisplay->IsAbsolutelyPositioned() || aDisplay->IsFloating() || NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay->mDisplay) { *aNewFrame = NS_NewBlockFormattingContext(mPresShell, styleContext); } else { *aNewFrame = NS_NewBlockFrame(mPresShell, styleContext); } return ConstructBlock(aState, aDisplay, aItem.mContent, aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame, styleContext, aNewFrame, aFrameItems, aDisplay->IsPositioned()); } nsresult nsCSSFrameConstructor::InitAndRestoreFrame(const nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIFrame* aPrevInFlow, nsIFrame* aNewFrame, PRBool aAllowCounters) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); nsresult rv = NS_OK; NS_ASSERTION(aNewFrame, "Null frame cannot be initialized"); if (!aNewFrame) return NS_ERROR_NULL_POINTER; // Initialize the frame rv = aNewFrame->Init(aContent, aParentFrame, aPrevInFlow); aNewFrame->AddStateBits(aState.mAdditionalStateBits); if (aState.mFrameState && aState.mFrameManager) { // Restore frame state for just the newly created frame. aState.mFrameManager->RestoreFrameStateFor(aNewFrame, aState.mFrameState); } if (aAllowCounters && !aPrevInFlow && mCounterManager.AddCounterResetsAndIncrements(aNewFrame)) { CountersDirty(); } return rv; } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsIFrame* aParentFrame, nsIContent* aContent) { nsStyleContext* parentStyleContext = nsnull; if (aContent->GetParent()) { aParentFrame = nsFrame::CorrectStyleParentFrame(aParentFrame, nsnull); if (aParentFrame) { // Resolve the style context based on the content object and the parent // style context parentStyleContext = aParentFrame->GetStyleContext(); } else { // Perhaps aParentFrame is a canvasFrame and we're replicating // fixed-pos frames. // XXX should we create a way to tell ConstructFrame which style // context to use, and pass it the style context for the // previous page's fixed-pos frame? } } else { // This has got to be a call from ConstructDocElementTableFrame. // Not sure how best to assert that here. } return ResolveStyleContext(parentStyleContext, aContent); } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsStyleContext* aParentStyleContext, nsIContent* aContent) { nsStyleSet *styleSet = mPresShell->StyleSet(); if (aContent->IsNodeOfType(nsINode::eELEMENT)) { return styleSet->ResolveStyleFor(aContent, aParentStyleContext); } NS_ASSERTION(aContent->IsNodeOfType(nsINode::eTEXT), "shouldn't waste time creating style contexts for " "comments and processing instructions"); return styleSet->ResolveStyleForNonElement(aParentStyleContext); } // MathML Mod - RBS #ifdef MOZ_MATHML nsresult nsCSSFrameConstructor::FlushAccumulatedBlock(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsFrameItems* aBlockItems, nsFrameItems* aNewItems) { if (!aBlockItems->childList) { // Nothing to do return NS_OK; } nsStyleContext* parentContext = nsFrame::CorrectStyleParentFrame(aParentFrame, nsCSSAnonBoxes::mozMathMLAnonymousBlock)->GetStyleContext(); nsStyleSet *styleSet = mPresShell->StyleSet(); nsRefPtr blockContext; blockContext = styleSet->ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozMathMLAnonymousBlock, parentContext); // then, create a block frame that will wrap the child frames. Make it a // MathML frame so that Get(Absolute/Float)ContainingBlockFor know that this // is not a suitable block. nsIFrame* blockFrame = NS_NewMathMLmathBlockFrame(mPresShell, blockContext, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); if (NS_UNLIKELY(!blockFrame)) return NS_ERROR_OUT_OF_MEMORY; InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, blockFrame); for (nsIFrame* f = aBlockItems->childList; f; f = f->GetNextSibling()) { ReparentFrame(aState.mFrameManager, blockFrame, f); } // abs-pos and floats are disabled in MathML children so we don't have to // worry about messing up those. blockFrame->SetInitialChildList(nsnull, aBlockItems->childList); *aBlockItems = nsFrameItems(); aNewItems->AddChild(blockFrame); return NS_OK; } // Only elements can be floated or positioned. All other MathML // should be in-flow. #define SIMPLE_MATHML_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | \ FCDATA_FORCE_NULL_ABSPOS_CONTAINER | \ FCDATA_WRAP_KIDS_IN_BLOCKS | \ FCDATA_SKIP_FRAMEMAP, _func) } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindMathMLData(nsIContent* aContent, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext) { // Make sure that we remain confined in the MathML world if (aNameSpaceID != kNameSpaceID_MathML) return nsnull; // Handle specially, because it sometimes produces inlines if (aTag == nsGkAtoms::math) { if (aStyleContext->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_BLOCK) { static const FrameConstructionData sBlockMathData = FCDATA_DECL(FCDATA_FORCE_NULL_ABSPOS_CONTAINER | FCDATA_WRAP_KIDS_IN_BLOCKS | FCDATA_SKIP_FRAMEMAP, NS_CreateNewMathMLmathBlockFrame); return &sBlockMathData; } static const FrameConstructionData sInlineMathData = FCDATA_DECL(FCDATA_FORCE_NULL_ABSPOS_CONTAINER | FCDATA_WRAP_KIDS_IN_BLOCKS | FCDATA_SKIP_FRAMEMAP | FCDATA_IS_LINE_PARTICIPANT, NS_NewMathMLmathInlineFrame); return &sInlineMathData; } static const FrameConstructionDataByTag sMathMLData[] = { SIMPLE_MATHML_CREATE(mi_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mn_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(ms_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mtext_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mo_, NS_NewMathMLmoFrame), SIMPLE_MATHML_CREATE(mfrac_, NS_NewMathMLmfracFrame), SIMPLE_MATHML_CREATE(msup_, NS_NewMathMLmsupFrame), SIMPLE_MATHML_CREATE(msub_, NS_NewMathMLmsubFrame), SIMPLE_MATHML_CREATE(msubsup_, NS_NewMathMLmsubsupFrame), SIMPLE_MATHML_CREATE(munder_, NS_NewMathMLmunderFrame), SIMPLE_MATHML_CREATE(mover_, NS_NewMathMLmoverFrame), SIMPLE_MATHML_CREATE(munderover_, NS_NewMathMLmunderoverFrame), SIMPLE_MATHML_CREATE(mphantom_, NS_NewMathMLmphantomFrame), SIMPLE_MATHML_CREATE(mpadded_, NS_NewMathMLmpaddedFrame), SIMPLE_MATHML_CREATE(mspace_, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(none, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(mprescripts_, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(mfenced_, NS_NewMathMLmfencedFrame), SIMPLE_MATHML_CREATE(mmultiscripts_, NS_NewMathMLmmultiscriptsFrame), SIMPLE_MATHML_CREATE(mstyle_, NS_NewMathMLmstyleFrame), SIMPLE_MATHML_CREATE(msqrt_, NS_NewMathMLmsqrtFrame), SIMPLE_MATHML_CREATE(mroot_, NS_NewMathMLmrootFrame), SIMPLE_MATHML_CREATE(maction_, NS_NewMathMLmactionFrame), SIMPLE_MATHML_CREATE(mrow_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(merror_, NS_NewMathMLmrowFrame) }; return FindDataByTag(aTag, aContent, aStyleContext, sMathMLData, NS_ARRAY_LENGTH(sMathMLData)); } #endif // MOZ_MATHML #ifdef MOZ_SVG // Only outer elements can be floated or positioned. All other SVG // should be in-flow. #define SIMPLE_SVG_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | \ FCDATA_SKIP_ABSPOS_PUSH | FCDATA_SKIP_FRAMEMAP | \ FCDATA_DISALLOW_GENERATED_CONTENT, _func) #define SIMPLE_SVG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_SVG_FCDATA(_func) } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindSVGData(nsIContent* aContent, nsIAtom* aTag, PRInt32 aNameSpaceID, nsIFrame* aParentFrame, nsStyleContext* aStyleContext) { if (aNameSpaceID != kNameSpaceID_SVG || !NS_SVGEnabled()) { return nsnull; } static const FrameConstructionData sSuppressData = SUPPRESS_FCDATA(); static const FrameConstructionData sGenericContainerData = SIMPLE_SVG_FCDATA(NS_NewSVGGenericContainerFrame); PRBool parentIsSVG = PR_FALSE; nsIContent* parentContent = aParentFrame ? aParentFrame->GetContent() : nsnull; // XXXbz should this really be based on the XBL-resolved tag of the parent // frame's content? Should it not be based on the type of the parent frame // (e.g. whether it's an SVG frame)? if (parentContent) { PRInt32 parentNSID; nsIAtom* parentTag = parentContent->GetOwnerDoc()->BindingManager()-> ResolveTag(aParentFrame->GetContent(), &parentNSID); // It's not clear whether the SVG spec intends to allow any SVG // content within svg:foreignObject at all (SVG 1.1, section // 23.2), but if it does, it better be svg:svg. So given that // we're allowing it, treat it as a non-SVG parent. parentIsSVG = parentNSID == kNameSpaceID_SVG && parentTag != nsGkAtoms::foreignObject; } if ((aTag != nsGkAtoms::svg && !parentIsSVG) || (aTag == nsGkAtoms::desc || aTag == nsGkAtoms::title)) { // Sections 5.1 and G.4 of SVG 1.1 say that SVG elements other than // svg:svg not contained within svg:svg are incorrect, although they // don't seem to specify error handling. Ignore them, since many of // our frame classes can't deal. It *may* be that the document // should at that point be considered in error according to F.2, but // it's hard to tell. // // Style mutation can't change this situation, so don't bother // adding to the undisplayed content map. // XXXbz except of course that this makes GetPrimaryFrameFor for this stuff // that much slower. // // We don't currently handle any UI for desc/title return &sSuppressData; } // Reduce the number of frames we create unnecessarily. Note that this is not // where we select which frame in a to render! That happens in // nsSVGSwitchFrame::PaintSVG. if (!NS_SVG_PassesConditionalProcessingTests(aContent)) { // Note that just returning is probably not right. According // to the spec, is allowed to use an element that fails its // conditional, but because we never actually create the frame when // a conditional fails and when we use GetReferencedFrame to find the // references, things don't work right. // XXX FIXME XXX return &sSuppressData; } // Special case for aTag == nsGkAtoms::svg because we don't want to // have to recompute parentIsSVG for it. if (aTag == nsGkAtoms::svg) { if (parentIsSVG) { static const FrameConstructionData sInnerSVGData = SIMPLE_SVG_FCDATA(NS_NewSVGInnerSVGFrame); return &sInnerSVGData; } static const FrameConstructionData sOuterSVGData = FCDATA_DECL(FCDATA_FORCE_VIEW | FCDATA_SKIP_ABSPOS_PUSH | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_GENERATED_CONTENT, NS_NewSVGOuterSVGFrame); return &sOuterSVGData; } // Special cases for text/tspan/textpath, because the kind of frame // they get depends on the parent frame. if (aTag == nsGkAtoms::text) { NS_ASSERTION(aParentFrame, "Should have aParentFrame here"); nsIFrame *ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { nsISVGTextContentMetrics* metrics = do_QueryFrame(ancestorFrame); // Text cannot be nested if (metrics) { return &sGenericContainerData; } } } else if (aTag == nsGkAtoms::tspan) { NS_ASSERTION(aParentFrame, "Should have aParentFrame here"); nsIFrame *ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { nsISVGTextContentMetrics* metrics = do_QueryFrame(ancestorFrame); if (!metrics) { return &sGenericContainerData; } } } else if (aTag == nsGkAtoms::textPath) { NS_ASSERTION(aParentFrame, "Should have aParentFrame here"); nsIFrame *ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParentFrame); if (!ancestorFrame || ancestorFrame->GetType() != nsGkAtoms::svgTextFrame) { return &sGenericContainerData; } } static const FrameConstructionDataByTag sSVGData[] = { SIMPLE_SVG_CREATE(g, NS_NewSVGGFrame), SIMPLE_SVG_CREATE(svgSwitch, NS_NewSVGSwitchFrame), SIMPLE_SVG_CREATE(polygon, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(polyline, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(circle, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(ellipse, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(line, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(rect, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(path, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(defs, NS_NewSVGContainerFrame), { &nsGkAtoms::foreignObject, FULL_CTOR_FCDATA(FCDATA_DISALLOW_OUT_OF_FLOW, &nsCSSFrameConstructor::ConstructSVGForeignObjectFrame) }, SIMPLE_SVG_CREATE(a, NS_NewSVGAFrame), SIMPLE_SVG_CREATE(text, NS_NewSVGTextFrame), SIMPLE_SVG_CREATE(tspan, NS_NewSVGTSpanFrame), SIMPLE_SVG_CREATE(linearGradient, NS_NewSVGLinearGradientFrame), SIMPLE_SVG_CREATE(radialGradient, NS_NewSVGRadialGradientFrame), SIMPLE_SVG_CREATE(stop, NS_NewSVGStopFrame), SIMPLE_SVG_CREATE(use, NS_NewSVGUseFrame), SIMPLE_SVG_CREATE(marker, NS_NewSVGMarkerFrame), SIMPLE_SVG_CREATE(image, NS_NewSVGImageFrame), SIMPLE_SVG_CREATE(clipPath, NS_NewSVGClipPathFrame), SIMPLE_SVG_CREATE(textPath, NS_NewSVGTextPathFrame), SIMPLE_SVG_CREATE(filter, NS_NewSVGFilterFrame), SIMPLE_SVG_CREATE(pattern, NS_NewSVGPatternFrame), SIMPLE_SVG_CREATE(mask, NS_NewSVGMaskFrame), SIMPLE_SVG_CREATE(feDistantLight, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(fePointLight, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feSpotLight, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feBlend, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feColorMatrix, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feFuncR, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feFuncG, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feFuncB, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feFuncA, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feComposite, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feConvolveMatrix, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feDisplacementMap, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feFlood, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feGaussianBlur, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feImage, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feMergeNode, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feMorphology, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feOffset, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feTile, NS_NewSVGLeafFrame), SIMPLE_SVG_CREATE(feTurbulence, NS_NewSVGLeafFrame) }; const FrameConstructionData* data = FindDataByTag(aTag, aContent, aStyleContext, sSVGData, NS_ARRAY_LENGTH(sSVGData)); if (!data) { data = &sGenericContainerData; } return data; } nsresult nsCSSFrameConstructor::ConstructSVGForeignObjectFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsIFrame* newFrame = NS_NewSVGForeignObjectFrame(mPresShell, styleContext); if (NS_UNLIKELY(!newFrame)) { return NS_ERROR_OUT_OF_MEMORY; } // We don't allow this frame to be out of flow InitAndRestoreFrame(aState, content, aParentFrame, nsnull, newFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); nsresult rv = aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame, PR_FALSE, PR_FALSE); if (NS_FAILED(rv)) { return rv; } nsRefPtr innerPseudoStyle; innerPseudoStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(content, nsCSSAnonBoxes::mozSVGForeignContent, styleContext); nsIFrame* blockFrame = NS_NewBlockFrame(mPresShell, innerPseudoStyle, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); if (NS_UNLIKELY(!blockFrame)) { newFrame->Destroy(); return NS_ERROR_OUT_OF_MEMORY; } nsFrameItems childItems; // Claim to be relatively positioned so that we end up being the // absolute containing block. rv = ConstructBlock(aState, innerPseudoStyle->GetStyleDisplay(), content, newFrame, newFrame, innerPseudoStyle, &blockFrame, childItems, PR_TRUE); // Give the blockFrame a view so that GetOffsetTo works for descendants // of blockFrame with views... nsHTMLContainerFrame::CreateViewForFrame(blockFrame, PR_TRUE); newFrame->SetInitialChildList(nsnull, childItems.childList); *aNewFrame = newFrame; return rv; } #endif // MOZ_SVG void nsCSSFrameConstructor::AddPageBreakItem(nsIContent* aContent, nsStyleContext* aMainStyleContext, FrameConstructionItemList& aItems) { nsRefPtr pseudoStyle; // Use the same parent style context that |aMainStyleContext| has, since // that's easier to re-resolve and it doesn't matter in practice. // (Getting different parents can result in framechange hints, e.g., // for user-modify.) pseudoStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::pageBreak, aMainStyleContext->GetParent()); NS_ASSERTION(pseudoStyle->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_BLOCK, "Unexpected display"); static const FrameConstructionData sPageBreakData = FCDATA_DECL(FCDATA_SKIP_FRAMEMAP, NS_NewPageBreakFrame); // Lie about the tag and namespace so we don't trigger anything // interesting during frame construction. aItems.AppendItem(&sPageBreakData, aContent, nsCSSAnonBoxes::pageBreak, kNameSpaceID_None, pseudoStyle.forget()); } nsresult nsCSSFrameConstructor::ConstructFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsFrameItems& aFrameItems) { NS_PRECONDITION(nsnull != aParentFrame, "no parent frame"); FrameConstructionItemList items; AddFrameConstructionItems(aState, aContent, aParentFrame, items); for (FCItemIterator iter(items); !iter.IsDone(); iter.Next()) { NS_ASSERTION(iter.item().DesiredParentType() == GetParentType(aParentFrame), "This is not going to work"); nsresult rv = ConstructFramesFromItem(aState, iter, aParentFrame, aFrameItems); NS_ENSURE_SUCCESS(rv, rv); } return NS_OK; } void nsCSSFrameConstructor::AddFrameConstructionItems(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, FrameConstructionItemList& aItems) { // don't create a whitespace frame if aParent doesn't want it if (!NeedFrameFor(aParentFrame, aContent)) { return; } // never create frames for comments or PIs if (aContent->IsNodeOfType(nsINode::eCOMMENT) || aContent->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) return; nsRefPtr styleContext; styleContext = ResolveStyleContext(aParentFrame, aContent); AddFrameConstructionItemsInternal(aState, aContent, aParentFrame, aContent->Tag(), aContent->GetNameSpaceID(), styleContext, ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK, aItems); } void nsCSSFrameConstructor::AddFrameConstructionItemsInternal(nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aParentFrame, nsIAtom* aTag, PRInt32 aNameSpaceID, nsStyleContext* aStyleContext, PRUint32 aFlags, FrameConstructionItemList& aItems) { // The following code allows the user to specify the base tag // of an element using XBL. XUL and HTML objects (like boxes, menus, etc.) // can then be extended arbitrarily. const nsStyleDisplay* display = aStyleContext->GetStyleDisplay(); nsRefPtr styleContext(aStyleContext); nsAutoEnqueueBinding binding(mDocument); if ((aFlags & ITEM_ALLOW_XBL_BASE) && display->mBinding) { // Ensure that our XBL bindings are installed. nsIXBLService * xblService = GetXBLService(); if (!xblService) return; PRBool resolveStyle; nsresult rv = xblService->LoadBindings(aContent, display->mBinding->mURI, display->mBinding->mOriginPrincipal, PR_FALSE, getter_AddRefs(binding.mBinding), &resolveStyle); if (NS_FAILED(rv)) return; if (resolveStyle) { styleContext = ResolveStyleContext(styleContext->GetParent(), aContent); display = styleContext->GetStyleDisplay(); aStyleContext = styleContext; } aTag = mDocument->BindingManager()->ResolveTag(aContent, &aNameSpaceID); } // Pre-check for display "none" - if we find that, don't create // any frame at all if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { aState.mFrameManager->SetUndisplayedContent(aContent, styleContext); return; } PRBool isText = aContent->IsNodeOfType(nsINode::eTEXT); PRBool isPopup = PR_FALSE; // Try to find frame construction data for this content const FrameConstructionData* data; if (isText) { data = FindTextData(aParentFrame); #ifdef MOZ_SVG if (!data) { // Nothing to do here; suppressed text inside SVG return; } #endif /* MOZ_SVG */ } else { #ifdef MOZ_SVG // Don't create frames for non-SVG element children of SVG elements. if (aNameSpaceID != kNameSpaceID_SVG && aParentFrame && aParentFrame->IsFrameOfType(nsIFrame::eSVG) && !aParentFrame->IsFrameOfType(nsIFrame::eSVGForeignObject) ) { return; } #endif /* MOZ_SVG */ data = FindHTMLData(aContent, aTag, aNameSpaceID, aParentFrame, styleContext); if (!data) { data = FindXULTagData(aContent, aTag, aNameSpaceID, styleContext); } #ifdef MOZ_MATHML if (!data) { data = FindMathMLData(aContent, aTag, aNameSpaceID, styleContext); } #endif #ifdef MOZ_SVG if (!data) { data = FindSVGData(aContent, aTag, aNameSpaceID, aParentFrame, styleContext); } #endif /* MOZ_SVG */ // Now check for XUL display types if (!data) { data = FindXULDisplayData(display, aContent, styleContext); } // And general display types if (!data) { data = FindDisplayData(display, aContent, styleContext); } NS_ASSERTION(data, "Should have frame construction data now"); if (data->mBits & FCDATA_SUPPRESS_FRAME) { return; } #ifdef MOZ_XUL if ((data->mBits & FCDATA_IS_POPUP) && (!aParentFrame || // Parent is inline aParentFrame->GetType() != nsGkAtoms::menuFrame)) { if (!aState.mPopupItems.containingBlock && !aState.mHavePendingPopupgroup) { return; } isPopup = PR_TRUE; } #endif /* MOZ_XUL */ } PRUint32 bits = data->mBits; // Inside colgroups, suppress everything except columns. if (aParentFrame && aParentFrame->GetType() == nsGkAtoms::tableColGroupFrame && (!(bits & FCDATA_IS_TABLE_PART) || display->mDisplay != NS_STYLE_DISPLAY_TABLE_COLUMN)) { return; } PRBool canHavePageBreak = (aFlags & ITEM_ALLOW_PAGE_BREAK) && aState.mPresContext->IsPaginated() && !display->IsAbsolutelyPositioned() && !(bits & FCDATA_IS_TABLE_PART); if (canHavePageBreak && display->mBreakBefore) { AddPageBreakItem(aContent, aStyleContext, aItems); } PRBool isGeneratedContent = ((aFlags & ITEM_IS_GENERATED_CONTENT) != 0); FrameConstructionItem* item = aItems.AppendItem(data, aContent, aTag, aNameSpaceID, styleContext.forget()); if (!item) { if (isGeneratedContent) { aContent->UnbindFromTree(); } return; } item->mIsText = isText; item->mIsGeneratedContent = isGeneratedContent; if (isGeneratedContent) { NS_ADDREF(item->mContent); } item->mIsRootPopupgroup = aNameSpaceID == kNameSpaceID_XUL && aTag == nsGkAtoms::popupgroup && aContent->IsRootOfNativeAnonymousSubtree(); if (item->mIsRootPopupgroup) { aState.mHavePendingPopupgroup = PR_TRUE; } item->mIsPopup = isPopup; if (canHavePageBreak && display->mBreakAfter) { AddPageBreakItem(aContent, aStyleContext, aItems); } if (bits & FCDATA_IS_INLINE) { // To correctly set item->mIsAllInline we need to build up our child items // right now. BuildInlineChildItems(aState, *item); item->mHasInlineEnds = PR_TRUE; } else { item->mIsAllInline = item->mHasInlineEnds = // Table-internal things are inline-outside if they're kids of // inlines, since they'll trigger construction of inline-table // pseudos. ((bits & FCDATA_IS_TABLE_PART) && (!aParentFrame || // No aParentFrame means inline aParentFrame->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_INLINE)) || // Things that are inline-outside but aren't inline frames are inline display->IsInlineOutside() || // Things that we're guaranteed will end up out-of-flow are inline. This // is not a precise test, since one of our ancestor inlines might add an // absolute containing block (if it's relatively positioned) or float // containing block (the latter if it gets split by child blocks on both // sides of us) when there wasn't such a containining block before. But // it's conservative in the sense that anything that will really end up // as an in-flow non-inline will have false mIsAllInline. It just might // be that even an inline that has mIsAllInline false doesn't need an // {ib} split. So this is just an optimization to keep from doint to // much work when that happens. (!(bits & FCDATA_DISALLOW_OUT_OF_FLOW) && aState.GetGeometricParent(display, nsnull)) || // Popups that are certainly out of flow. isPopup; } if (item->mIsAllInline) { aItems.InlineItemAdded(); } if (bits & FCDATA_IS_LINE_PARTICIPANT) { aItems.LineParticipantItemAdded(); } } static void DestroyContent(void *aObject, nsIAtom *aPropertyName, void *aPropertyValue, void *aData) { nsIContent* content = static_cast(aPropertyValue); content->UnbindFromTree(); NS_RELEASE(content); } nsresult nsCSSFrameConstructor::ConstructFramesFromItem(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, nsFrameItems& aFrameItems) { nsIFrame* adjParentFrame = aParentFrame; nsStyleContext* styleContext = aItem.mStyleContext; AdjustParentFrame(adjParentFrame, aItem.mFCData, styleContext); if (aItem.mIsText) { return ConstructTextFrame(aItem.mFCData, aState, aItem.mContent, adjParentFrame, styleContext, aFrameItems); } // If the page contains markup that overrides text direction, and // does not contain any characters that would activate the Unicode // bidi algorithm, we need to call |SetBidiEnabled| on the pres // context before reflow starts. This requires us to resolve some // style information now. See bug 115921. { if (styleContext->GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) aState.mPresContext->SetBidiEnabled(); } // Start background loads during frame construction. This is just // a hint; the paint code will do the right thing in any case. { styleContext->GetStyleBackground(); } nsFrameState savedStateBits = aState.mAdditionalStateBits; if (aItem.mIsGeneratedContent) { // Ensure that frames created here are all tagged with // NS_FRAME_GENERATED_CONTENT. aState.mAdditionalStateBits |= NS_FRAME_GENERATED_CONTENT; // Note that we're not necessarily setting this property on the primary // frame for the content for which this is generated content. We might be // setting it on a table pseudo-frame inserted under that instead. That's // OK, though; we just need to do the property set so that the content will // get cleaned up when the frame is destroyed. aParentFrame->SetProperty(styleContext->GetPseudoType(), aItem.mContent, DestroyContent); // Now that we've passed ownership of aItem.mContent to the frame, unset // our generated content flag so we don't release or unbind it ourselves. aItem.mIsGeneratedContent = PR_FALSE; } // XXXbz maybe just inline ConstructFrameFromItemInternal here or something? nsresult rv = ConstructFrameFromItemInternal(aItem, aState, adjParentFrame, aFrameItems); aState.mAdditionalStateBits = savedStateBits; return rv; } inline PRBool IsRootBoxFrame(nsIFrame *aFrame) { return (aFrame->GetType() == nsGkAtoms::rootFrame); } nsresult nsCSSFrameConstructor::ReconstructDocElementHierarchy() { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); return ReconstructDocElementHierarchyInternal(); } static void InvalidateCanvasIfNeeded(nsIPresShell* presShell, nsIContent* node); nsresult nsCSSFrameConstructor::ReconstructDocElementHierarchyInternal() { #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ReconstructDocElementHierarchy\n"); } #endif nsresult rv = NS_OK; // XXXbz is that null-check needed? Why? if (mDocument && mPresShell) { nsIContent *rootContent = mDocument->GetRootContent(); if (rootContent) { // Invalidate the canvas, just to be safe InvalidateCanvasIfNeeded(mPresShell, rootContent); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull, nsnull, mTempFrameTreeState); // Before removing the frames associated with the content object, ask them to save their // state onto a temporary state object. CaptureStateFor(state.mFrameManager->GetRootFrame(), mTempFrameTreeState); // Get the frame that corresponds to the document element nsIFrame* docElementFrame = state.mFrameManager->GetPrimaryFrameFor(rootContent, -1); if (docElementFrame) { // Destroy out-of-flow frames that might not be in the frame subtree // rooted at docElementFrame ::DeletingFrameSubtree(state.mFrameManager, docElementFrame); } else { state.mFrameManager->ClearUndisplayedContentIn(rootContent, nsnull); } // Remove any existing fixed items: they are always on the // FixedContainingBlock. Note that this has to be done before we call // ClearPlaceholderFrameMap(), since RemoveFixedItems uses the // placeholder frame map. rv = RemoveFixedItems(state, docElementFrame); if (NS_SUCCEEDED(rv)) { nsPlaceholderFrame* placeholderFrame = nsnull; if (docElementFrame && (docElementFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { // Get the placeholder frame now, before we tear down the // placeholder frame map placeholderFrame = state.mFrameManager->GetPlaceholderFrameFor(docElementFrame); NS_ASSERTION(placeholderFrame, "No placeholder for out-of-flow?"); } // Clear the hash tables that map from content to frame and out-of-flow // frame to placeholder frame state.mFrameManager->ClearPrimaryFrameMap(); state.mFrameManager->ClearPlaceholderFrameMap(); state.mFrameManager->ClearUndisplayedContentMap(); if (docElementFrame) { // Take the docElementFrame, and remove it from its parent. // XXXbz So why can't we reuse ContentRemoved? // Notify self that we will destroy the entire frame tree, this blocks // RemoveMappingsForFrameSubtree() which would otherwise lead to a // crash since we cleared the placeholder map above (bug 398982). PRBool wasDestroyingFrameTree = mIsDestroyingFrameTree; WillDestroyFrameTree(PR_FALSE); rv = state.mFrameManager->RemoveFrame(docElementFrame->GetParent(), GetChildListNameFor(docElementFrame), docElementFrame); if (placeholderFrame) { // Remove the placeholder frame first (XXX second for now) (so // that it doesn't retain a dangling pointer to memory) rv |= state.mFrameManager->RemoveFrame(placeholderFrame->GetParent(), nsnull, placeholderFrame); } mIsDestroyingFrameTree = wasDestroyingFrameTree; if (NS_FAILED(rv)) { return rv; } } } } if (rootContent && NS_SUCCEEDED(rv)) { mRootElementFrame = nsnull; mRootElementStyleFrame = nsnull; // We don't reuse the old frame constructor state because, // for example, its mPopupItems may be stale nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull, nsnull, mTempFrameTreeState); // Create the new document element hierarchy nsIFrame* newChild; rv = ConstructDocElementFrame(state, rootContent, mDocElementContainingBlock, &newChild); // newChild could be null even if |rv| is success, thanks to XBL. if (NS_SUCCEEDED(rv) && newChild) { rv = state.mFrameManager->InsertFrames(mDocElementContainingBlock, nsnull, nsnull, newChild); } } } return rv; } nsIFrame* nsCSSFrameConstructor::GetFrameFor(nsIContent* aContent) { // Get the primary frame associated with the content nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (!frame) return nsnull; nsIFrame* insertionFrame = frame->GetContentInsertionFrame(); NS_ASSERTION(insertionFrame == frame || !frame->IsLeaf(), "The insertion frame is the primary frame or the primary frame isn't a leaf"); return insertionFrame; } nsIFrame* nsCSSFrameConstructor::GetAbsoluteContainingBlock(nsIFrame* aFrame) { NS_PRECONDITION(nsnull != mRootElementFrame, "no root element frame"); // Starting with aFrame, look for a frame that is absolutely positioned or // relatively positioned nsIFrame* containingBlock = nsnull; for (nsIFrame* frame = aFrame; frame && !containingBlock; frame = frame->GetParent()) { if (frame->IsFrameOfType(nsIFrame::eMathML)) { // If it's mathml, bail out -- no absolute positioning out from inside // mathml frames. Note that we don't make this part of the loop // condition because of the stuff at the end of this method... return nsnull; } // Is it positioned? // If it's table-related then ignore it, because for the time // being table-related frames are not containers for absolutely // positioned child frames. const nsStyleDisplay* disp = frame->GetStyleDisplay(); if (disp->IsPositioned() && !IsTableRelated(frame->GetType())) { // Find the outermost wrapped block under this frame for (nsIFrame* wrappedFrame = aFrame; wrappedFrame != frame->GetParent(); wrappedFrame = wrappedFrame->GetParent()) { nsIAtom* frameType = wrappedFrame->GetType(); if (nsGkAtoms::blockFrame == frameType || #ifdef MOZ_XUL nsGkAtoms::XULLabelFrame == frameType || #endif nsGkAtoms::positionedInlineFrame == frameType) { containingBlock = wrappedFrame; } else if (nsGkAtoms::fieldSetFrame == frameType) { // If the positioned frame is a fieldset, use the area frame inside it. // We don't use GetContentInsertionFrame for fieldsets yet. containingBlock = GetFieldSetBlockFrame(wrappedFrame); } } #ifdef DEBUG if (!containingBlock) NS_WARNING("Positioned frame that does not handle positioned kids; looking further up the parent chain"); #endif } } // If we found an absolutely positioned containing block, then use the // first-continuation. if (containingBlock) return AdjustAbsoluteContainingBlock(containingBlock); // If we didn't find it, then use the document element containing block return mHasRootAbsPosContainingBlock ? mDocElementContainingBlock : nsnull; } nsIFrame* nsCSSFrameConstructor::GetFloatContainingBlock(nsIFrame* aFrame) { NS_PRECONDITION(mRootElementFrame, "no root element frame"); // Starting with aFrame, look for a frame that is a float containing block. // IF we hit a mathml frame, bail out; we don't allow floating out of mathml // frames, because they don't seem to be able to deal. // The logic here needs to match the logic in ProcessChildren() for (nsIFrame* containingBlock = aFrame; containingBlock && !containingBlock->IsFrameOfType(nsIFrame::eMathML) && !containingBlock->IsBoxFrame(); containingBlock = containingBlock->GetParent()) { if (containingBlock->IsFloatContainingBlock()) { return containingBlock; } } // If we didn't find a containing block, then there just isn't // one.... return null return nsnull; } /** * This function will check whether aContainer has :after generated content. * If so, appending to it should actually insert. The return value is the * parent to use for newly-appended content. *aAfterFrame points to the :after * frame before which appended content should go, if there is one. */ static nsIFrame* AdjustAppendParentForAfterContent(nsPresContext* aPresContext, nsIContent* aContainer, nsIFrame* aParentFrame, nsIFrame** aAfterFrame) { // See if the parent has an :after pseudo-element. Check for the presence // of style first, since nsLayoutUtils::GetAfterFrame is sorta expensive. nsStyleContext* parentStyle = aParentFrame->GetStyleContext(); if (nsLayoutUtils::HasPseudoStyle(aContainer, parentStyle, nsCSSPseudoElements::after, aPresContext)) { nsIFrame* afterFrame = nsLayoutUtils::GetAfterFrame(aParentFrame); if (afterFrame) { *aAfterFrame = afterFrame; return afterFrame->GetParent(); } } *aAfterFrame = nsnull; return aParentFrame; } /** * This function is called by ContentAppended() and ContentInserted() * when appending flowed frames to a parent's principal child list. It * handles the case where the parent frame has :after pseudo-element * generated content. */ nsresult nsCSSFrameConstructor::AppendFrames(nsFrameConstructorState& aState, nsIContent* aContainer, nsIFrame* aParentFrame, nsFrameItems& aFrameList, nsIFrame* aAfterFrame) { #ifdef DEBUG nsIFrame* debugAfterFrame; nsIFrame* debugNewParent = ::AdjustAppendParentForAfterContent(aState.mPresContext, aContainer, aParentFrame, &debugAfterFrame); NS_ASSERTION(debugNewParent == aParentFrame, "Incorrect parent"); NS_ASSERTION(debugAfterFrame == aAfterFrame, "Incorrect after frame"); #endif nsFrameManager* frameManager = aState.mFrameManager; if (aAfterFrame) { NS_ASSERTION(!IsFrameSpecial(aParentFrame) || IsInlineFrame(aParentFrame) || !IsInlineOutside(aAfterFrame), "Shouldn't have inline :after content on the block in an " "{ib} split"); nsFrameList frames(aParentFrame->GetFirstChild(nsnull)); // Insert the frames before the :after pseudo-element. return frameManager->InsertFrames(aParentFrame, nsnull, frames.GetPrevSiblingFor(aAfterFrame), aFrameList.childList); } if (IsFrameSpecial(aParentFrame) && !IsInlineFrame(aParentFrame) && IsInlineOutside(aFrameList.lastChild)) { NS_ASSERTION(!aParentFrame->GetNextContinuation() || !aParentFrame->GetNextContinuation()->GetFirstChild(nsnull), "Shouldn't happen"); // We want to put some of the frames into the following inline frame. nsIFrame* lastBlock = FindLastBlock(aFrameList.childList); nsIFrame* firstTrailingInline; if (lastBlock) { firstTrailingInline = lastBlock->GetNextSibling(); lastBlock->SetNextSibling(nsnull); aFrameList.lastChild = lastBlock; } else { firstTrailingInline = aFrameList.childList; aFrameList = nsFrameItems(); } NS_ASSERTION(firstTrailingInline, "How did that happen?"); nsIFrame* inlineSibling = GetSpecialSibling(aParentFrame); NS_ASSERTION(inlineSibling, "How did that happen?"); nsIFrame* stateParent = inlineSibling->GetParent(); nsFrameConstructorState targetState(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(stateParent), GetFloatContainingBlock(stateParent)); MoveFramesToEndOfIBSplit(aState, inlineSibling, firstTrailingInline, aParentFrame, &targetState); } if (!aFrameList.childList) { // It all got eaten by the special inline return NS_OK; } return frameManager->AppendFrames(aParentFrame, nsnull, aFrameList.childList); } #define UNSET_DISPLAY 255 // This gets called to see if the frames corresponding to aSiblingDisplay and aDisplay // should be siblings in the frame tree. Although (1) rows and cols, (2) row groups // and col groups, (3) row groups and captions, (4) legends and content inside fieldsets, (5) popups and other kids of the menu // are siblings from a content perspective, they are not considered siblings in the // frame tree. PRBool nsCSSFrameConstructor::IsValidSibling(nsIFrame* aSibling, nsIContent* aContent, PRUint8& aDisplay) { nsIFrame* parentFrame = aSibling->GetParent(); nsIAtom* parentType = nsnull; nsIAtom* grandparentType = nsnull; if (parentFrame) { parentType = parentFrame->GetType(); nsIFrame* grandparentFrame = parentFrame->GetParent(); if (grandparentFrame) { grandparentType = grandparentFrame->GetType(); } } PRUint8 siblingDisplay = aSibling->GetStyleDisplay()->mDisplay; if ((NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_COLUMN == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_CAPTION == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == siblingDisplay) || (NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == siblingDisplay) || nsGkAtoms::menuFrame == parentType) { // if we haven't already, construct a style context to find the display type of aContent if (UNSET_DISPLAY == aDisplay) { nsRefPtr styleContext; nsIFrame* styleParent; PRBool providerIsChild; if (NS_FAILED(aSibling-> GetParentStyleContextFrame(aSibling->PresContext(), &styleParent, &providerIsChild)) || !styleParent) { NS_NOTREACHED("Shouldn't happen"); return PR_FALSE; } styleContext = ResolveStyleContext(styleParent, aContent); if (!styleContext) return PR_FALSE; const nsStyleDisplay* display = styleContext->GetStyleDisplay(); aDisplay = display->mDisplay; } if (nsGkAtoms::menuFrame == parentType) { return (NS_STYLE_DISPLAY_POPUP == aDisplay) == (NS_STYLE_DISPLAY_POPUP == siblingDisplay); } switch (siblingDisplay) { case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP: return (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == aDisplay); case NS_STYLE_DISPLAY_TABLE_COLUMN: return (NS_STYLE_DISPLAY_TABLE_COLUMN == aDisplay); case NS_STYLE_DISPLAY_TABLE_CAPTION: return (NS_STYLE_DISPLAY_TABLE_CAPTION == aDisplay); default: // all of the row group types return (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == aDisplay) || (NS_STYLE_DISPLAY_TABLE_CAPTION == aDisplay); } } else if (nsGkAtoms::fieldSetFrame == parentType || (nsGkAtoms::fieldSetFrame == grandparentType && nsGkAtoms::blockFrame == parentType)) { // Legends can be sibling of legends but not of other content in the fieldset nsIAtom* sibType = aSibling->GetType(); nsCOMPtr legendContent(do_QueryInterface(aContent)); if ((legendContent && (nsGkAtoms::legendFrame != sibType)) || (!legendContent && (nsGkAtoms::legendFrame == sibType))) return PR_FALSE; } return PR_TRUE; } nsIFrame* nsCSSFrameConstructor::FindFrameForContentSibling(nsIContent* aContent, nsIContent* aTargetContent, PRUint8& aTargetContentDisplay, PRBool aPrevSibling) { nsIFrame* sibling = mPresShell->GetPrimaryFrameFor(aContent); if (!sibling) { return nsnull; } // If the frame is out-of-flow, GPFF() will have returned the // out-of-flow frame; we want the placeholder. if (sibling->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { nsIFrame* placeholderFrame; mPresShell->GetPlaceholderFrameFor(sibling, &placeholderFrame); NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame"); sibling = placeholderFrame; } // The frame we have now should never be a continuation NS_ASSERTION(!sibling->GetPrevContinuation(), "How did that happen?"); if (aPrevSibling) { // The frame may be a special frame (a split inline frame that // contains a block). Get the last part of that split. if (IsFrameSpecial(sibling)) { sibling = GetLastSpecialSibling(sibling, PR_FALSE); } // The frame may have a continuation. If so, we want the last // non-overflow-container continuation as our previous sibling. sibling = sibling->GetTailContinuation(); } if (aTargetContent && !IsValidSibling(sibling, aTargetContent, aTargetContentDisplay)) { sibling = nsnull; } return sibling; } nsIFrame* nsCSSFrameConstructor::FindPreviousSibling(const ChildIterator& aFirst, ChildIterator aIter) { nsIContent* child = *aIter; PRUint8 childDisplay = UNSET_DISPLAY; // Note: not all content objects are associated with a frame (e.g., if it's // `display: none') so keep looking until we find a previous frame while (aIter-- != aFirst) { nsIFrame* prevSibling = FindFrameForContentSibling(*aIter, child, childDisplay, PR_TRUE); if (prevSibling) { // Found a previous sibling, we're done! return prevSibling; } } return nsnull; } nsIFrame* nsCSSFrameConstructor::FindNextSibling(ChildIterator aIter, const ChildIterator& aLast) { if (aIter == aLast) { // XXXbz Can happen when XBL lies to us about insertion points. This check // might be able to go away once bug 474324 is fixed. return nsnull; } nsIContent* child = *aIter; PRUint8 childDisplay = UNSET_DISPLAY; while (++aIter != aLast) { nsIFrame* nextSibling = FindFrameForContentSibling(*aIter, child, childDisplay, PR_FALSE); if (nextSibling) { // We found a next sibling, we're done! return nextSibling; } } return nsnull; } // For fieldsets, returns the area frame, if the child is not a legend. static nsIFrame* GetAdjustedParentFrame(nsIFrame* aParentFrame, nsIAtom* aParentFrameType, nsIContent* aChildContent) { NS_PRECONDITION(nsGkAtoms::tableOuterFrame != aParentFrameType, "Shouldn't be happening!"); nsIFrame* newParent = nsnull; if (nsGkAtoms::fieldSetFrame == aParentFrameType) { // If the parent is a fieldSet, use the fieldSet's area frame as the // parent unless the new content is a legend. nsCOMPtr legendContent(do_QueryInterface(aChildContent)); if (!legendContent) { newParent = GetFieldSetBlockFrame(aParentFrame); } } return (newParent) ? newParent : aParentFrame; } static PRBool IsSpecialFramesetChild(nsIContent* aContent) { // IMPORTANT: This must match the conditions in nsHTMLFramesetFrame::Init. return aContent->IsNodeOfType(nsINode::eHTML) && (aContent->Tag() == nsGkAtoms::frameset || aContent->Tag() == nsGkAtoms::frame); } nsresult nsCSSFrameConstructor::ContentAppended(nsIContent* aContainer, PRInt32 aNewIndexInContainer) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentAppended container=%p index=%d\n", static_cast(aContainer), aNewIndexInContainer); if (gReallyNoisyContentUpdates && aContainer) { aContainer->List(stdout, 0); } } #endif #ifdef MOZ_XUL if (aContainer) { PRInt32 namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContainer, &namespaceID); // Just ignore tree tags, anyway we don't create any frames for them. if (tag == nsGkAtoms::treechildren || tag == nsGkAtoms::treeitem || tag == nsGkAtoms::treerow) return NS_OK; } #endif // MOZ_XUL // Get the frame associated with the content nsIFrame* parentFrame = GetFrameFor(aContainer); if (! parentFrame) return NS_OK; // See if we have an XBL insertion point. If so, then that's our // real parent frame; if not, then the frame hasn't been built yet // and we just bail. // nsIFrame* insertionPoint; PRBool multiple = PR_FALSE; GetInsertionPoint(parentFrame, nsnull, &insertionPoint, &multiple); if (! insertionPoint) return NS_OK; // Don't build the frames. PRBool hasInsertion = PR_FALSE; if (!multiple) { nsIDocument* document = nsnull; nsIContent *firstAppendedChild = aContainer->GetChildAt(aNewIndexInContainer); if (firstAppendedChild) { document = firstAppendedChild->GetDocument(); } if (document && document->BindingManager()->GetInsertionParent(firstAppendedChild)) { hasInsertion = PR_TRUE; } } if (multiple || hasInsertion) { // We have an insertion point. There are some additional tests we need to do // in order to ensure that an append is a safe operation. PRUint32 childCount = 0; if (!multiple) { // We may need to make multiple ContentInserted calls instead. A // reasonable heuristic to employ (in order to maintain good performance) // is to find out if the insertion point's content node contains any // explicit children. If it does not, then it is highly likely that // an append is occurring. (Note it is not definite, and there are insane // cases we will not deal with by employing this heuristic, but it beats // always falling back to multiple ContentInserted calls). // // In the multiple insertion point case, we know we're going to need to do // multiple ContentInserted calls anyway. childCount = insertionPoint->GetContent()->GetChildCount(); } if (multiple || childCount > 0) { // Now comes the fun part. For each appended child, make a // ContentInserted call as if it had just gotten inserted at the index // it's at in aContainer and let ContentInserted handle the mess. If our // insertion point is non-XBL that's the correct index, and otherwise // ContentInserted will ignore the passed-in index. PRUint32 containerCount = aContainer->GetChildCount(); for (PRUint32 i = aNewIndexInContainer; i < containerCount; i++) { LAYOUT_PHASE_TEMP_EXIT(); // Call ContentInserted with this index. ContentInserted(aContainer, aContainer->GetChildAt(i), i, mTempFrameTreeState); LAYOUT_PHASE_TEMP_REENTER(); } return NS_OK; } } parentFrame = insertionPoint; if (parentFrame->GetType() == nsGkAtoms::frameSetFrame) { // Check whether we have any kids we care about. PRUint32 count = aContainer->GetChildCount(); for (PRUint32 i = aNewIndexInContainer; i < count; ++i) { if (IsSpecialFramesetChild(aContainer->GetChildAt(i))) { // Just reframe the parent, since framesets are weird like that. return RecreateFramesForContent(parentFrame->GetContent()); } } } if (parentFrame->IsLeaf()) { // Nothing to do here; we shouldn't be constructing kids of leaves return NS_OK; } #ifdef MOZ_MATHML if (parentFrame->IsFrameOfType(nsIFrame::eMathML)) return RecreateFramesForContent(parentFrame->GetContent()); #endif // If the frame we are manipulating is a ``special'' frame (that is, one // that's been created as a result of a block-in-inline situation) then we // need to append to the last special sibling, not to the frame itself. if (IsFrameSpecial(parentFrame)) { #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentAppended: parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" is special\n"); } #endif // Since we're appending, we'll walk to the last anonymous frame // that was created for the broken inline frame. But don't walk // to the trailing inline if its empty; stop at the block. parentFrame = GetLastSpecialSibling(parentFrame, PR_TRUE); } // Get continuation that parents the last child parentFrame = nsLayoutUtils::GetLastContinuationWithChild(parentFrame); nsIAtom* frameType = parentFrame->GetType(); // We should never get here with fieldsets, since they have multiple // insertion points. NS_ASSERTION(frameType != nsGkAtoms::fieldSetFrame, "Unexpected parent"); // Deal with possible :after generated content on the parent nsIFrame* parentAfterFrame; parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), aContainer, parentFrame, &parentAfterFrame); // Create some new frames nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), GetFloatContainingBlock(parentFrame)); // See if the containing block has :first-letter style applied. PRBool haveFirstLetterStyle = PR_FALSE, haveFirstLineStyle = PR_FALSE; nsIFrame* containingBlock = state.mFloatedItems.containingBlock; if (containingBlock) { haveFirstLetterStyle = HasFirstLetterStyle(containingBlock); haveFirstLineStyle = ShouldHaveFirstLineStyle(containingBlock->GetContent(), containingBlock->GetStyleContext()); } if (haveFirstLetterStyle) { // Before we get going, remove the current letter frames RemoveLetterFrames(state.mPresContext, state.mPresShell, state.mFrameManager, containingBlock); } FrameConstructionItemList items; for (PRUint32 i = aNewIndexInContainer, count = aContainer->GetChildCount(); i < count; ++i) { AddFrameConstructionItems(state, aContainer->GetChildAt(i), parentFrame, items); } // Perform special check for diddling around with the frames in // a special inline frame. // If we're appending before :after content, then we're not really // appending, so let WipeContainingBlock know that. if (WipeContainingBlock(state, containingBlock, parentFrame, items, !parentAfterFrame, nsnull)) { return NS_OK; } nsFrameItems frameItems; ConstructFramesFromItemList(state, items, parentFrame, frameItems); for (PRUint32 i = aNewIndexInContainer, count = aContainer->GetChildCount(); i < count; ++i) { // Invalidate now instead of before the WipeContainingBlock call, just in // case we do wipe; in that case we don't need to do this walk at all. // XXXbz does that matter? Would it make more sense to save some virtual // GetChildAt calls instead and do this during construction of our // FrameConstructionItemList? InvalidateCanvasIfNeeded(mPresShell, aContainer->GetChildAt(i)); } // if the container is a table and a caption was appended, it needs to be put // in the outer table frame's additional child list. nsFrameItems captionItems; if (nsGkAtoms::tableFrame == frameType) { // Pull out the captions. Note that we don't want to do that as we go, // because processing a single caption can add a whole bunch of things to // the frame items due to pseudoframe processing. So we'd have to pull // captions from a list anyway; might as well do that here. // XXXbz this is no longer true; we could pull captions directly out of the // FrameConstructionItemList now. PullOutCaptionFrames(frameItems, captionItems); } if (haveFirstLineStyle && parentFrame == containingBlock) { // It's possible that some of the new frames go into a // first-line frame. Look at them and see... AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } nsresult result = NS_OK; // Notify the parent frame passing it the list of new frames if (NS_SUCCEEDED(result) && (frameItems.childList || captionItems.childList)) { // Append the flowed frames to the principal child list, tables need special treatment if (nsGkAtoms::tableFrame == frameType) { if (captionItems.childList) { // append the caption to the outer table nsIFrame* outerTable = parentFrame->GetParent(); if (outerTable) { state.mFrameManager->AppendFrames(outerTable, nsGkAtoms::captionList, captionItems.childList); } } if (frameItems.childList) { // append children of the inner table AppendFrames(state, aContainer, parentFrame, frameItems, parentAfterFrame); } } else { AppendFrames(state, aContainer, parentFrame, frameItems, parentAfterFrame); } } // Recover first-letter frames if (haveFirstLetterStyle) { RecoverLetterFrames(containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates) { nsIFrameDebug* fdbg = do_QueryFrame(parentFrame); if (fdbg) { printf("nsCSSFrameConstructor::ContentAppended: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif return NS_OK; } #ifdef MOZ_XUL enum content_operation { CONTENT_INSERTED, CONTENT_REMOVED }; // Helper function to lookup the listbox body frame and send a notification // for insertion or removal of content static PRBool NotifyListBoxBody(nsPresContext* aPresContext, nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, nsIDocument* aDocument, nsIFrame* aChildFrame, content_operation aOperation) { if (!aContainer) return PR_FALSE; if (aContainer->IsNodeOfType(nsINode::eXUL) && aChild->IsNodeOfType(nsINode::eXUL) && aContainer->Tag() == nsGkAtoms::listbox && aChild->Tag() == nsGkAtoms::listitem) { nsCOMPtr xulElement = do_QueryInterface(aContainer); nsCOMPtr boxObject; xulElement->GetBoxObject(getter_AddRefs(boxObject)); nsCOMPtr listBoxObject = do_QueryInterface(boxObject); if (listBoxObject) { nsListBoxBodyFrame* listBoxBodyFrame = listBoxObject->GetListBoxBody(PR_FALSE); if (listBoxBodyFrame) { if (aOperation == CONTENT_REMOVED) { // Except if we have an aChildFrame and its parent is not the right // thing, then we don't do this. Pseudo frames are so much fun.... if (!aChildFrame || aChildFrame->GetParent() == listBoxBodyFrame) { listBoxBodyFrame->OnContentRemoved(aPresContext, aChildFrame, aIndexInContainer); return PR_TRUE; } } else { // If this codepath ever starts using aIndexInContainer, need to // change ContentInserted to pass in something resembling a correct // one in the XBL cases. listBoxBodyFrame->OnContentInserted(aPresContext, aChild); return PR_TRUE; } } } } return PR_FALSE; } #endif // MOZ_XUL nsresult nsCSSFrameConstructor::ContentInserted(nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, nsILayoutHistoryState* aFrameState) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentInserted container=%p child=%p index=%d\n", static_cast(aContainer), static_cast(aChild), aIndexInContainer); if (gReallyNoisyContentUpdates) { (aContainer ? aContainer : aChild)->List(stdout, 0); } } #endif nsresult rv = NS_OK; #ifdef MOZ_XUL // aIndexInContainer might be bogus here, but it's not used by // NotifyListBoxBody's CONTENT_INSERTED handling in any case. if (NotifyListBoxBody(mPresShell->GetPresContext(), aContainer, aChild, aIndexInContainer, mDocument, nsnull, CONTENT_INSERTED)) return NS_OK; #endif // MOZ_XUL // If we have a null parent, then this must be the document element // being inserted if (! aContainer) { nsIContent *docElement = mDocument->GetRootContent(); if (aChild == docElement) { NS_PRECONDITION(nsnull == mRootElementFrame, "root element frame already created"); if (!mDocElementContainingBlock) return NS_OK; // We get into this situation when an XBL binding is asynchronously // applied to the root tag (e.g., in XUL). It's ok. We can // just bail here because the root will really be built later during // InitialReflow. // Create frames for the document element and its child elements nsIFrame* docElementFrame; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull, nsnull, aFrameState); rv = ConstructDocElementFrame(state, docElement, mDocElementContainingBlock, &docElementFrame); if (NS_SUCCEEDED(rv) && docElementFrame) { if (mDocElementContainingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW) { // Set the initial child list for the parent and wait on the initial // reflow. mDocElementContainingBlock->SetInitialChildList(nsnull, docElementFrame); } else { // Whoops, we've already received our initial reflow! Insert the doc. // element as a child so it reflows (note that containing block is // empty, so we can simply append). NS_ASSERTION(mDocElementContainingBlock->GetFirstChild(nsnull) == nsnull, "Unexpected child of document element containing block"); mDocElementContainingBlock->AppendFrames(nsnull, docElementFrame); } InvalidateCanvasIfNeeded(mPresShell, aChild); #ifdef DEBUG if (gReallyNoisyContentUpdates) { nsIFrameDebug* fdbg = do_QueryFrame(docElementFrame); if (fdbg) { printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif } } // otherwise this is not a child of the root element, and we // won't let it have a frame. return NS_OK; } // Otherwise, we've got parent content. Find its frame. nsIFrame* parentFrame = GetFrameFor(aContainer); if (! parentFrame) return NS_OK; // XXXwaterson will this break selects? (See ``Here // we have been notified...'' below.) // See if we have an XBL insertion point. If so, then that's our // real parent frame; if not, then the frame hasn't been built yet // and we just bail. nsIFrame* insertionPoint; GetInsertionPoint(parentFrame, aChild, &insertionPoint); if (! insertionPoint) return NS_OK; // Don't build the frames. parentFrame = insertionPoint; // Find the frame that precedes the insertion point. Walk backwards // from the parent frame to get the parent content, because if an // XBL insertion point is involved, we'll need to use _that_ to find // the preceding frame. nsIContent* container = parentFrame->GetContent(); ChildIterator first, last; ChildIterator::Init(container, &first, &last); ChildIterator iter(first); if (iter.XBLInvolved() || container != aContainer) { iter.seek(aChild); // Don't touch our aIndexInContainer, though it's almost certainly bogus in // this case. If someone wants to use an index below, they should make // sure to use the right index (aIndexInContainer vs iter.position()) with // the right parent node. } else if (aIndexInContainer != -1) { // Do things the fast way if we can. The check for -1 is because editor is // severely broken and calls us directly for native anonymous nodes that it // creates. iter.seek(aIndexInContainer); NS_ASSERTION(*iter == aChild, "Someone screwed up the indexing"); } #ifdef DEBUG else { NS_WARNING("Someone passed native anonymous content directly into frame " "construction. Stop doing that!"); } #endif nsIFrame* prevSibling = FindPreviousSibling(first, iter); PRBool isAppend = PR_FALSE; nsIFrame* appendAfterFrame; // This is only looked at when isAppend is true // Now, find the geometric parent so that we can handle // continuations properly. Use the prev sibling if we have it; // otherwise use the next sibling. if (prevSibling) { parentFrame = prevSibling->GetParent()->GetContentInsertionFrame(); } else { // If there is no previous sibling, then find the frame that follows nsIFrame* nextSibling = FindNextSibling(iter, last); if (nextSibling) { parentFrame = nextSibling->GetParent()->GetContentInsertionFrame(); } else { // No previous or next sibling, so treat this like an appended frame. isAppend = PR_TRUE; // Get continuation that parents the last child parentFrame = nsLayoutUtils::GetLastContinuationWithChild(parentFrame); // Deal with fieldsets parentFrame = ::GetAdjustedParentFrame(parentFrame, parentFrame->GetType(), aChild); parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), container, parentFrame, &appendAfterFrame); } } if (parentFrame->GetType() == nsGkAtoms::frameSetFrame && IsSpecialFramesetChild(aChild)) { // Just reframe the parent, since framesets are weird like that. return RecreateFramesForContent(parentFrame->GetContent()); } // Don't construct kids of leaves if (parentFrame->IsLeaf()) { return NS_OK; } #ifdef MOZ_MATHML if (parentFrame->IsFrameOfType(nsIFrame::eMathML)) return RecreateFramesForContent(parentFrame->GetContent()); #endif nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), GetFloatContainingBlock(parentFrame), aFrameState); // Recover state for the containing block - we need to know if // it has :first-letter or :first-line style applied to it. The // reason we care is that the internal structure in these cases // is not the normal structure and requires custom updating // logic. nsIFrame* containingBlock = state.mFloatedItems.containingBlock; PRBool haveFirstLetterStyle = PR_FALSE; PRBool haveFirstLineStyle = PR_FALSE; // In order to shave off some cycles, we only dig up the // containing block haveFirst* flags if the parent frame where // the insertion/append is occurring is an inline or block // container. For other types of containers this isn't relevant. const nsStyleDisplay* parentDisplay = parentFrame->GetStyleDisplay(); // Examine the parentFrame where the insertion is taking // place. If it's a certain kind of container then some special // processing is done. if ((NS_STYLE_DISPLAY_BLOCK == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_LIST_ITEM == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_INLINE == parentDisplay->mDisplay) || (NS_STYLE_DISPLAY_INLINE_BLOCK == parentDisplay->mDisplay)) { // Recover the special style flags for the containing block if (containingBlock) { haveFirstLetterStyle = HasFirstLetterStyle(containingBlock); haveFirstLineStyle = ShouldHaveFirstLineStyle(containingBlock->GetContent(), containingBlock->GetStyleContext()); } if (haveFirstLetterStyle) { // Get the correct parentFrame and prevSibling - if a // letter-frame is present, use its parent. if (parentFrame->GetType() == nsGkAtoms::letterFrame) { parentFrame = parentFrame->GetParent(); container = parentFrame->GetContent(); } // Remove the old letter frames before doing the insertion RemoveLetterFrames(state.mPresContext, mPresShell, state.mFrameManager, state.mFloatedItems.containingBlock); // Removing the letterframes messes around with the frame tree, removing // and creating frames. We need to reget our prevsibling. ChildIterator::Init(container, &first, &last); if (last.XBLInvolved() || container != aContainer) { last.seek(aChild); } else if (aIndexInContainer != -1) { last.seek(aIndexInContainer); NS_ASSERTION(*iter == aChild, "Someone screwed up the indexing"); } prevSibling = FindPreviousSibling(first, last); } } if (!prevSibling) { // We're inserting the new frame as the first child. See if the // parent has a :before pseudo-element nsIFrame* firstChild = parentFrame->GetFirstChild(nsnull); if (firstChild && nsLayoutUtils::IsGeneratedContentFor(container, firstChild, nsCSSPseudoElements::before)) { // Insert the new frames after the last continuation of the :before prevSibling = firstChild->GetTailContinuation(); parentFrame = prevSibling->GetParent(); // We perhaps could leave this true and take the AppendFrames path // below, but we'd have to update appendAfterFrame and it seems safer // to force all insert-after-:before cases to take these to take the // InsertFrames path isAppend = PR_FALSE; } } FrameConstructionItemList items; AddFrameConstructionItems(state, aChild, parentFrame, items); // Perform special check for diddling around with the frames in // a special inline frame. // If we're appending before :after content, then we're not really // appending, so let WipeContainingBlock know that. if (WipeContainingBlock(state, containingBlock, parentFrame, items, isAppend && !appendAfterFrame, prevSibling)) return NS_OK; // if the container is a table and a caption will be appended, it needs to be // put in the outer table frame's additional child list. nsFrameItems frameItems, captionItems; ConstructFramesFromItemList(state, items, parentFrame, frameItems); if (frameItems.childList) { InvalidateCanvasIfNeeded(mPresShell, aChild); if (nsGkAtoms::tableCaptionFrame == frameItems.childList->GetType()) { NS_ASSERTION(frameItems.childList == frameItems.lastChild , "adding a non caption frame to the caption childlist?"); captionItems.AddChild(frameItems.childList); frameItems = nsFrameItems(); } } // If the parent of our current prevSibling is different from the frame we'll // actually use as the parent, then the calculated insertion point is now // invalid and as it is unknown where to insert correctly we append instead // (bug 341858). // This can affect our appendAfterFrame, but should not have any effect on // the WipeContainingBlock above, since this should only happen when neither // parent is a special frame (and in fact, only when one is an outer table // and one is an inner table or when the parent is a fieldset or fieldset // content frame). // XXXbz we should push our frame construction item code up higher, so we // know what our items are by the time we start figuring out previous // siblings if (prevSibling && frameItems.childList && frameItems.childList->GetParent() != prevSibling->GetParent()) { #ifdef DEBUG nsIFrame* frame1 = frameItems.childList->GetParent(); nsIFrame* frame2 = prevSibling->GetParent(); NS_ASSERTION(!IsFrameSpecial(frame1) && !IsFrameSpecial(frame2), "Neither should be special"); NS_ASSERTION((frame1->GetType() == nsGkAtoms::tableFrame && frame2->GetType() == nsGkAtoms::tableOuterFrame) || (frame1->GetType() == nsGkAtoms::tableOuterFrame && frame2->GetType() == nsGkAtoms::tableFrame) || frame1->GetType() == nsGkAtoms::fieldSetFrame || (frame1->GetParent() && frame1->GetParent()->GetType() == nsGkAtoms::fieldSetFrame), "Unexpected frame types"); #endif prevSibling = nsnull; isAppend = PR_TRUE; parentFrame = ::AdjustAppendParentForAfterContent(mPresShell->GetPresContext(), container, frameItems.childList->GetParent(), &appendAfterFrame); } if (haveFirstLineStyle && parentFrame == containingBlock) { // It's possible that the new frame goes into a first-line // frame. Look at it and see... if (isAppend) { // Use append logic when appending AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } else { // Use more complicated insert logic when inserting // XXXbz this method is a no-op, so it's easy for the args being passed // here to make no sense without anyone noticing... If it ever stops // being a no-op, vet them carefully! InsertFirstLineFrames(state, container, containingBlock, &parentFrame, prevSibling, frameItems); } } nsIFrame* const newFrame = frameItems.childList; if (NS_SUCCEEDED(rv) && newFrame) { NS_ASSERTION(!captionItems.childList, "leaking caption frames"); // Notify the parent frame if (isAppend) { AppendFrames(state, container, parentFrame, frameItems, appendAfterFrame); } else { state.mFrameManager->InsertFrames(parentFrame, nsnull, prevSibling, newFrame); } } else { // we might have a caption treat it here nsIFrame* newCaptionFrame = captionItems.childList; if (NS_SUCCEEDED(rv) && newCaptionFrame) { nsIFrame* outerTableFrame; if (GetCaptionAdjustedParent(parentFrame, newCaptionFrame, &outerTableFrame)) { // If the parent of our current prevSibling is different from the frame // we'll actually use as the parent, then the calculated insertion // point is now invalid (bug 341382). if (prevSibling && prevSibling->GetParent() != outerTableFrame) { prevSibling = nsnull; } // If the parent is not a outer table frame we will try to add frames // to a named child list that the parent does not honour and the frames // will get lost NS_ASSERTION(nsGkAtoms::tableOuterFrame == outerTableFrame->GetType(), "Pseudo frame construction failure, " "a caption can be only a child of a outer table frame"); if (isAppend) { state.mFrameManager->AppendFrames(outerTableFrame, nsGkAtoms::captionList, newCaptionFrame); } else { state.mFrameManager->InsertFrames(outerTableFrame, nsGkAtoms::captionList, prevSibling, newCaptionFrame); } } } } if (haveFirstLetterStyle) { // Recover the letter frames for the containing block when // it has first-letter style. RecoverLetterFrames(state.mFloatedItems.containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates && parentFrame) { nsIFrameDebug* fdbg = do_QueryFrame(parentFrame); if (fdbg) { printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif return NS_OK; } nsresult nsCSSFrameConstructor::ReinsertContent(nsIContent* aContainer, nsIContent* aChild) { PRInt32 ix = aContainer->IndexOf(aChild); // XXX For now, do a brute force remove and insert. // XXXbz this probably doesn't work so well with anonymous content // XXXbz doesn't this need to do the state-saving stuff that // RecreateFramesForContent does? PRBool didReconstruct; nsresult res = ContentRemoved(aContainer, aChild, ix, &didReconstruct); if (NS_SUCCEEDED(res) && !didReconstruct) { // If ContentRemoved just reconstructed everything, there is no need to // reinsert the content here res = ContentInserted(aContainer, aChild, ix, nsnull); } return res; } static void DoDeletingFrameSubtree(nsFrameManager* aFrameManager, nsTArray& aDestroyQueue, nsIFrame* aRemovedFrame, nsIFrame* aFrame); static void DoDeletingOverflowContainers(nsFrameManager* aFrameManager, nsTArray& aDestroyQueue, nsIFrame* aRemovedFrame, nsIFrame* aFrame) { // The invariant that "continuing frames should be found as part of the // walk over the top-most frame's continuing frames" does not hold for // out-of-flow overflow containers, so we need to walk them too. // Note that DoDeletingFrameSubtree() skips the child lists where // overflow containers live so we won't process them twice. const PRBool orphanSubtree = aRemovedFrame == aFrame; for (nsIFrame* next = aFrame->GetNextContinuation(); next && (next->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER); next = next->GetNextContinuation()) { DoDeletingFrameSubtree(aFrameManager, aDestroyQueue, orphanSubtree ? next : aRemovedFrame, next); } } /** * Called when a frame subtree is about to be deleted. Two important * things happen: * * 1. For each frame in the subtree, we remove the mapping from the * content object to its frame * * 2. For child frames that have been moved out of the flow, we enqueue * the out-of-flow frame for deletion *if* the out-of-flow frame's * geometric parent is not in |aRemovedFrame|'s hierarchy (e.g., an * absolutely positioned element that has been promoted to be a direct * descendant of an area frame). * * Note: this function should only be called by DeletingFrameSubtree() * * @param aRemovedFrame this is the frame that was removed from the * content model. As we recurse we need to remember this so we * can check if out-of-flow frames are a descendant of the frame * being removed * @param aFrame the local subtree that is being deleted. This is initially * the same as aRemovedFrame, but as we recurse down the tree * this changes */ static void DoDeletingFrameSubtree(nsFrameManager* aFrameManager, nsTArray& aDestroyQueue, nsIFrame* aRemovedFrame, nsIFrame* aFrame) { #undef RECURSE #define RECURSE(top, child) \ DoDeletingFrameSubtree(aFrameManager, aDestroyQueue, (top), (child)); \ DoDeletingOverflowContainers(aFrameManager, aDestroyQueue, (top), (child)); // Remove the mapping from the content object to its frame. nsIContent* content = aFrame->GetContent(); if (content) { aFrameManager->RemoveAsPrimaryFrame(content, aFrame); aFrameManager->ClearAllUndisplayedContentIn(content); } nsIAtom* childListName = nsnull; PRInt32 childListIndex = 0; do { // Walk aFrame's normal flow child frames looking for placeholder frames. nsIFrame* childFrame = aFrame->GetFirstChild(childListName); for (; childFrame; childFrame = childFrame->GetNextSibling()) { NS_ASSERTION(!(childFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW), "out-of-flow on wrong child list"); if (NS_LIKELY(nsGkAtoms::placeholderFrame != childFrame->GetType())) { RECURSE(aRemovedFrame, childFrame); } else { nsIFrame* outOfFlowFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(childFrame); // Remove the mapping from the out-of-flow frame to its placeholder. aFrameManager->UnregisterPlaceholderFrame((nsPlaceholderFrame*)childFrame); // Don't SetOutOfFlowFrame(nsnull) here because the float cache depends // on it when the float is removed later on, see bug 348688 comment 6. // Queue the out-of-flow frame to be destroyed only if aRemovedFrame is _not_ // one of its ancestor frames or if it is a popup frame. // If aRemovedFrame is an ancestor of the out-of-flow frame, then // the out-of-flow frame will be destroyed by aRemovedFrame. if (outOfFlowFrame->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_POPUP || !nsLayoutUtils::IsProperAncestorFrame(aRemovedFrame, outOfFlowFrame)) { NS_ASSERTION(aDestroyQueue.IndexOf(outOfFlowFrame) == kNotFound, "out-of-flow is already in the destroy queue"); aDestroyQueue.AppendElement(outOfFlowFrame); // Recurse into the out-of-flow, it is now the aRemovedFrame. RECURSE(outOfFlowFrame, outOfFlowFrame); } else { // Also recurse into the out-of-flow when it's a descendant of aRemovedFrame // since we don't walk those lists, see |childListName| increment below. RECURSE(aRemovedFrame, outOfFlowFrame); } } } // Move to next child list but skip lists with frames we should have // a placeholder for or that contains only next-in-flow overflow containers // (which we walk explicitly above). do { childListName = aFrame->GetAdditionalChildListName(childListIndex++); } while (IsOutOfFlowList(childListName) || childListName == nsGkAtoms::overflowContainersList || childListName == nsGkAtoms::excessOverflowContainersList); } while (childListName); } /** * Called when a frame is about to be deleted. Calls DoDeletingFrameSubtree() * for aFrame and each of its continuing frames */ static nsresult DeletingFrameSubtree(nsFrameManager* aFrameManager, nsIFrame* aFrame) { NS_ENSURE_TRUE(aFrame, NS_OK); // XXXldb Remove this sometime in the future. // If there's no frame manager it's probably because the pres shell is // being destroyed. if (NS_UNLIKELY(!aFrameManager)) { return NS_OK; } nsAutoTArray destroyQueue; // If it's a "special" block-in-inline frame, then we can't really deal. // That really shouldn't be happening. NS_ASSERTION(!IsFrameSpecial(aFrame), "DeletingFrameSubtree on a special frame. Prepare to crash."); do { DoDeletingFrameSubtree(aFrameManager, destroyQueue, aFrame, aFrame); // If it's split, then get the continuing frame. Note that we only do // this for the top-most frame being deleted. Don't do it if we're // recursing over a subtree, because those continuing frames should be // found as part of the walk over the top-most frame's continuing frames. // Walking them again will make this an N^2/2 algorithm. // The above is true for normal child next-in-flows but not overflow // containers which we do walk because they *can* escape the subtree // we're deleting. We skip [excess]overflowContainersList where // they live to avoid processing them more than once. aFrame = aFrame->GetNextContinuation(); } while (aFrame); // Now destroy any out-of-flow frames that have been enqueued for // destruction. for (PRInt32 i = destroyQueue.Length() - 1; i >= 0; --i) { nsIFrame* outOfFlowFrame = destroyQueue[i]; // Ask the out-of-flow's parent to delete the out-of-flow // frame from the right list. aFrameManager->RemoveFrame(outOfFlowFrame->GetParent(), GetChildListNameFor(outOfFlowFrame), outOfFlowFrame); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveMappingsForFrameSubtree(nsIFrame* aRemovedFrame) { NS_ASSERTION(!(aRemovedFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW), "RemoveMappingsForFrameSubtree doesn't handle out-of-flows"); if (NS_UNLIKELY(mIsDestroyingFrameTree)) { // The frame tree might not be in a consistent state after // WillDestroyFrameTree() has been called. Most likely we're destroying // the pres shell which means the frame manager takes care of clearing all // mappings so there is no need to walk the frame tree here, bug 372576. return NS_OK; } nsFrameManager *frameManager = mPresShell->FrameManager(); if (nsGkAtoms::placeholderFrame == aRemovedFrame->GetType()) { nsIFrame *placeholderFrame = aRemovedFrame; do { NS_ASSERTION(placeholderFrame->GetType() == nsGkAtoms::placeholderFrame, "continuation must be of same type"); nsIFrame* outOfFlowFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(placeholderFrame); // Remove the mapping from the out-of-flow frame to its placeholder. frameManager->UnregisterPlaceholderFrame( static_cast(placeholderFrame)); ::DeletingFrameSubtree(frameManager, outOfFlowFrame); frameManager->RemoveFrame(outOfFlowFrame->GetParent(), GetChildListNameFor(outOfFlowFrame), outOfFlowFrame); placeholderFrame = placeholderFrame->GetNextContinuation(); } while (placeholderFrame); } // Save the frame tree's state before deleting it CaptureStateFor(aRemovedFrame, mTempFrameTreeState); return ::DeletingFrameSubtree(frameManager, aRemovedFrame); } static void UnregisterPlaceholderChain(nsFrameManager* frameManager, nsPlaceholderFrame* placeholderFrame) { // Remove the mapping from the frame to its placeholder nsPlaceholderFrame* curFrame = placeholderFrame; do { frameManager->UnregisterPlaceholderFrame(curFrame); curFrame->SetOutOfFlowFrame(nsnull); curFrame = static_cast(curFrame->GetNextContinuation()); } while (curFrame); } nsresult nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer, nsIContent* aChild, PRInt32 aIndexInContainer, PRBool* aDidReconstruct) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); *aDidReconstruct = PR_FALSE; // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved container=%p child=%p index=%d\n", static_cast(aContainer), static_cast(aChild), aIndexInContainer); if (gReallyNoisyContentUpdates) { aContainer->List(stdout, 0); } } #endif nsFrameManager *frameManager = mPresShell->FrameManager(); nsPresContext *presContext = mPresShell->GetPresContext(); nsresult rv = NS_OK; // Find the child frame that maps the content nsIFrame* childFrame = mPresShell->FrameManager()->GetPrimaryFrameFor(aChild, aIndexInContainer); if (!childFrame || childFrame->GetContent() != aChild) { // XXXbz the GetContent() != aChild check is needed due to bug 135040. // Remove it once that's fixed. frameManager->ClearUndisplayedContentIn(aChild, aContainer); } #ifdef MOZ_XUL if (NotifyListBoxBody(presContext, aContainer, aChild, aIndexInContainer, mDocument, childFrame, CONTENT_REMOVED)) return NS_OK; #endif // MOZ_XUL if (childFrame) { InvalidateCanvasIfNeeded(mPresShell, aChild); // If the frame we are manipulating is a special frame then do // something different instead of just inserting newly created // frames. // NOTE: if we are in ReinsertContent, // then do not reframe as we are already doing just that! if (MaybeRecreateContainerForIBSplitterFrame(childFrame, &rv)) { *aDidReconstruct = PR_TRUE; return rv; } // Get the childFrame's parent frame nsIFrame* parentFrame = childFrame->GetParent(); nsIAtom* parentType = parentFrame->GetType(); if (parentType == nsGkAtoms::frameSetFrame && IsSpecialFramesetChild(aChild)) { // Just reframe the parent, since framesets are weird like that. *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(parentFrame->GetContent()); } #ifdef MOZ_MATHML // If we're a child of MathML, then we should reframe the MathML content. // If we're non-MathML, then we would be wrapped in a block so we need to // check our grandparent in that case. nsIFrame* possibleMathMLAncestor = parentType == nsGkAtoms::blockFrame ? parentFrame->GetParent() : parentFrame; if (possibleMathMLAncestor->IsFrameOfType(nsIFrame::eMathML)) { *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(possibleMathMLAncestor->GetContent()); } #endif // Undo XUL wrapping if it's no longer needed. // (If we're in the XUL block-wrapping situation, parentFrame is the // wrapper frame.) nsIFrame* grandparentFrame = parentFrame->GetParent(); if (grandparentFrame && grandparentFrame->IsBoxFrame() && (grandparentFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && // check if this frame is the only one needing wrapping aChild == AnyKidsNeedBlockParent(parentFrame->GetFirstChild(nsnull)) && !AnyKidsNeedBlockParent(childFrame->GetNextSibling())) { *aDidReconstruct = PR_TRUE; return RecreateFramesForContent(grandparentFrame->GetContent()); } // Examine the containing-block for the removed content and see if // :first-letter style applies. nsIFrame* containingBlock = GetFloatContainingBlock(parentFrame); PRBool haveFLS = containingBlock && HasFirstLetterStyle(containingBlock); if (haveFLS) { // Trap out to special routine that handles adjusting a blocks // frame tree when first-letter style is present. #ifdef NOISY_FIRST_LETTER printf("ContentRemoved: containingBlock="); nsFrame::ListTag(stdout, containingBlock); printf(" parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif // First update the containing blocks structure by removing the // existing letter frames. This makes the subsequent logic // simpler. RemoveLetterFrames(presContext, mPresShell, frameManager, containingBlock); // Recover childFrame and parentFrame childFrame = mPresShell->GetPrimaryFrameFor(aChild); if (!childFrame || childFrame->GetContent() != aChild) { // XXXbz the GetContent() != aChild check is needed due to bug 135040. // Remove it once that's fixed. frameManager->ClearUndisplayedContentIn(aChild, aContainer); return NS_OK; } parentFrame = childFrame->GetParent(); #ifdef NOISY_FIRST_LETTER printf(" ==> revised parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif } #ifdef DEBUG if (gReallyNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved: childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); nsIFrameDebug* fdbg = do_QueryFrame(parentFrame); if (fdbg) fdbg->List(stdout, 0); } #endif // Walk the frame subtree deleting any out-of-flow frames, and // remove the mapping from content objects to frames ::DeletingFrameSubtree(frameManager, childFrame); // See if the child frame is an out-of-flow if (childFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { nsPlaceholderFrame* placeholderFrame = frameManager->GetPlaceholderFrameFor(childFrame); NS_ASSERTION(placeholderFrame, "No placeholder for out-of-flow?"); UnregisterPlaceholderChain(frameManager, placeholderFrame); // Now we remove the out-of-flow frame // XXX has to be done first for now: for floats, the block's line list // contains an array of pointers to the placeholder - we have to // remove the float first (which gets rid of the lines // reference to the placeholder and float) and then remove the // placeholder rv = frameManager->RemoveFrame(parentFrame, GetChildListNameFor(childFrame), childFrame); // Remove the placeholder frame first (XXX second for now) (so // that it doesn't retain a dangling pointer to memory) nsIFrame* placeholderParent = placeholderFrame->GetParent(); ::DeletingFrameSubtree(frameManager, placeholderFrame); rv |= frameManager->RemoveFrame(placeholderParent, nsnull, placeholderFrame); } else { // Notify the parent frame that it should delete the frame // check for a table caption which goes on an additional child list with a different parent nsIFrame* outerTableFrame; if (GetCaptionAdjustedParent(parentFrame, childFrame, &outerTableFrame)) { rv = frameManager->RemoveFrame(outerTableFrame, nsGkAtoms::captionList, childFrame); } else { rv = frameManager->RemoveFrame(parentFrame, nsnull, childFrame); } } if (mRootElementFrame == childFrame) { mRootElementFrame = nsnull; mRootElementStyleFrame = nsnull; } if (haveFLS && mRootElementFrame) { NS_ASSERTION(containingBlock == GetFloatContainingBlock(parentFrame), "What happened here?"); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(parentFrame), containingBlock); RecoverLetterFrames(containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates && parentFrame) { nsIFrameDebug* fdbg = do_QueryFrame(parentFrame); if (fdbg) { printf("nsCSSFrameConstructor::ContentRemoved: resulting frame model:\n"); fdbg->List(stdout, 0); } } #endif } return rv; } #ifdef DEBUG // To ensure that the functions below are only called within // |ApplyRenderingChangeToTree|. static PRBool gInApplyRenderingChangeToTree = PR_FALSE; #endif static void DoApplyRenderingChangeToTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange); /** * @param aBoundsRect returns the bounds enclosing the areas covered by aFrame and its childre * This rect is relative to aFrame's parent */ static void UpdateViewsForTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange) { NS_PRECONDITION(gInApplyRenderingChangeToTree, "should only be called within ApplyRenderingChangeToTree"); nsIView* view = aFrame->GetView(); if (view) { if (aChange & nsChangeHint_SyncFrameView) { nsContainerFrame::SyncFrameViewProperties(aFrame->PresContext(), aFrame, nsnull, view); } } // now do children of frame PRInt32 listIndex = 0; nsIAtom* childList = nsnull; do { nsIFrame* child = aFrame->GetFirstChild(childList); while (child) { if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) || (child->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) { // only do frames that don't have placeholders if (nsGkAtoms::placeholderFrame == child->GetType()) { // placeholder // get out of flow frame and start over there nsIFrame* outOfFlowFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(child); DoApplyRenderingChangeToTree(outOfFlowFrame, aViewManager, aFrameManager, aChange); } else { // regular frame UpdateViewsForTree(child, aViewManager, aFrameManager, aChange); } } child = child->GetNextSibling(); } childList = aFrame->GetAdditionalChildListName(listIndex++); } while (childList); } static void DoApplyRenderingChangeToTree(nsIFrame* aFrame, nsIViewManager* aViewManager, nsFrameManager* aFrameManager, nsChangeHint aChange) { NS_PRECONDITION(gInApplyRenderingChangeToTree, "should only be called within ApplyRenderingChangeToTree"); for ( ; aFrame; aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame)) { // Get view if this frame has one and trigger an update. If the // frame doesn't have a view, find the nearest containing view // (adjusting r's coordinate system to reflect the nesting) and // update there. UpdateViewsForTree(aFrame, aViewManager, aFrameManager, aChange); // if frame has view, will already be invalidated if (aChange & nsChangeHint_RepaintFrame) { if (aFrame->IsFrameOfType(nsIFrame::eSVG)) { #ifdef MOZ_SVG if (!(aFrame->GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) { nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(aFrame); if (outerSVGFrame) { // marker changes can change the covered region outerSVGFrame->UpdateAndInvalidateCoveredRegion(aFrame); } } #endif } else { aFrame->Invalidate(aFrame->GetOverflowRect()); } } } } static void ApplyRenderingChangeToTree(nsPresContext* aPresContext, nsIFrame* aFrame, nsChangeHint aChange) { nsIPresShell *shell = aPresContext->PresShell(); PRBool isPaintingSuppressed = PR_FALSE; shell->IsPaintingSuppressed(&isPaintingSuppressed); if (isPaintingSuppressed) { // Don't allow synchronous rendering changes when painting is turned off. aChange = NS_SubtractHint(aChange, nsChangeHint_RepaintFrame); if (!aChange) { return; } } // If the frame's background is propagated to an ancestor, walk up to // that ancestor. const nsStyleBackground *bg; while (!nsCSSRendering::FindBackground(aPresContext, aFrame, &bg)) { aFrame = aFrame->GetParent(); NS_ASSERTION(aFrame, "root frame must paint"); } nsIViewManager* viewManager = shell->GetViewManager(); // Trigger rendering updates by damaging this frame and any // continuations of this frame. // XXX this needs to detect the need for a view due to an opacity change and deal with it... nsIViewManager::UpdateViewBatch batch(viewManager); #ifdef DEBUG gInApplyRenderingChangeToTree = PR_TRUE; #endif DoApplyRenderingChangeToTree(aFrame, viewManager, shell->FrameManager(), aChange); #ifdef DEBUG gInApplyRenderingChangeToTree = PR_FALSE; #endif batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); } /** * This method invalidates the canvas when frames are removed or added for a * node that might have its background propagated to the canvas, i.e., a * document root node or an HTML BODY which is a child of the root node. * * @param aFrame a frame for a content node about to be removed or a frme that * was just created for a content node that was inserted. */ static void InvalidateCanvasIfNeeded(nsIPresShell* presShell, nsIContent* node) { NS_PRECONDITION(presShell->GetRootFrame(), "What happened here?"); NS_PRECONDITION(presShell->GetPresContext(), "Say what?"); // Note that both in ContentRemoved and ContentInserted the content node // will still have the right parent pointer, so looking at that is ok. nsIContent* parent = node->GetParent(); if (parent) { // Has a parent; might not be what we want nsIContent* grandParent = parent->GetParent(); if (grandParent) { // Has a grandparent, so not what we want return; } // Check whether it's an HTML body if (node->Tag() != nsGkAtoms::body || !node->IsNodeOfType(nsINode::eHTML)) { return; } } // At this point the node has no parent or it's an HTML child of the // root. We might not need to invalidate in this case (eg we might be in // XHTML or something), but chances are we want to. Play it safe. // Invalidate the viewport. // Wrap this in a DEFERRED view update batch so we don't try to // flush out layout here nsIViewManager::UpdateViewBatch batch(presShell->GetViewManager()); ApplyRenderingChangeToTree(presShell->GetPresContext(), presShell->GetRootFrame(), nsChangeHint_RepaintFrame); batch.EndUpdateViewBatch(NS_VMREFRESH_DEFERRED); } nsresult nsCSSFrameConstructor::StyleChangeReflow(nsIFrame* aFrame) { // If the frame hasn't even received an initial reflow, then don't // send it a style-change reflow! if (aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) return NS_OK; #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::StyleChangeReflow: aFrame="); nsFrame::ListTag(stdout, aFrame); printf("\n"); } #endif // If the frame is part of a split block-in-inline hierarchy, then // target the style-change reflow at the first ``normal'' ancestor // so we're sure that the style change will propagate to any // anonymously created siblings. if (IsFrameSpecial(aFrame)) aFrame = GetIBContainingBlockFor(aFrame); do { mPresShell->FrameNeedsReflow(aFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); aFrame = aFrame->GetNextContinuation(); } while (aFrame); return NS_OK; } nsresult nsCSSFrameConstructor::CharacterDataChanged(nsIContent* aContent, PRBool aAppend) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); nsresult rv = NS_OK; // Find the child frame nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); // Notify the first frame that maps the content. It will generate a reflow // command // It's possible the frame whose content changed isn't inserted into the // frame hierarchy yet, or that there is no frame that maps the content if (nsnull != frame) { #if 0 NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("nsCSSFrameConstructor::CharacterDataChanged: content=%p[%s] subcontent=%p frame=%p", aContent, ContentTag(aContent, 0), aSubContent, frame)); #endif // Special check for text content that is a child of a letter frame. If // this happens, we should remove the letter frame, do whatever we're // planning to do with this notification, then put the letter frame back. // Note that this is basically what ReinsertContent ends up doing; the // reason we dont' want to call that here is that our text content could be // native anonymous, in which case ReinsertContent would completely barf on // it. And reinserting the non-anonymous ancestor would just lead us to // come back into this notification (e.g. if quotes or counters are // involved), leading to a loop. nsIFrame* block = GetFloatContainingBlock(frame); PRBool haveFirstLetterStyle = PR_FALSE; if (block) { // See if the block has first-letter style applied to it. haveFirstLetterStyle = HasFirstLetterStyle(block); if (haveFirstLetterStyle) { RemoveLetterFrames(mPresShell->GetPresContext(), mPresShell, mPresShell->FrameManager(), block); // Reget |frame|, since we might have killed it. // Do we really need to call CharacterDataChanged in this case, though? frame = mPresShell->GetPrimaryFrameFor(aContent); NS_ASSERTION(frame, "Should have frame here!"); } } frame->CharacterDataChanged(mPresShell->GetPresContext(), aContent, aAppend); if (haveFirstLetterStyle) { nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(frame), block, nsnull); RecoverLetterFrames(block); } } return rv; } nsresult nsCSSFrameConstructor::ProcessRestyledFrames(nsStyleChangeList& aChangeList) { NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(), "Someone forgot a script blocker"); PRInt32 count = aChangeList.Count(); if (!count) return NS_OK; // Make sure to not rebuild quote or counter lists while we're // processing restyles BeginUpdate(); nsPropertyTable *propTable = mPresShell->GetPresContext()->PropertyTable(); // Mark frames so that we skip frames that die along the way, bug 123049. // A frame can be in the list multiple times with different hints. Further // optmization is possible if nsStyleChangeList::AppendChange could coalesce PRInt32 index = count; while (0 <= --index) { const nsStyleChangeData* changeData; aChangeList.ChangeAt(index, &changeData); if (changeData->mFrame) { propTable->SetProperty(changeData->mFrame, nsGkAtoms::changeListProperty, nsnull, nsnull, nsnull); } } index = count; while (0 <= --index) { nsIFrame* frame; nsIContent* content; nsChangeHint hint; aChangeList.ChangeAt(index, frame, content, hint); if (frame && frame->GetContent() != content) { // XXXbz this is due to image maps messing with the primary frame map. // See bug 135040. Remove this block once that's fixed. frame = nsnull; if (!(hint & nsChangeHint_ReconstructFrame)) { continue; } } // skip any frame that has been destroyed due to a ripple effect if (frame) { nsresult res; propTable->GetProperty(frame, nsGkAtoms::changeListProperty, &res); if (NS_PROPTABLE_PROP_NOT_THERE == res) continue; } if (hint & nsChangeHint_ReconstructFrame) { RecreateFramesForContent(content); } else { NS_ASSERTION(frame, "This shouldn't happen"); #ifdef MOZ_SVG if (hint & nsChangeHint_UpdateEffects) { nsSVGEffects::UpdateEffects(frame); } #endif if (hint & nsChangeHint_ReflowFrame) { StyleChangeReflow(frame); } if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView)) { ApplyRenderingChangeToTree(mPresShell->GetPresContext(), frame, hint); } if (hint & nsChangeHint_UpdateCursor) { nsIViewManager* viewMgr = mPresShell->GetViewManager(); if (viewMgr) viewMgr->SynthesizeMouseMove(PR_FALSE); } } } EndUpdate(); // cleanup references and verify the style tree. Note that the latter needs // to happen once we've processed the whole list, since until then the tree // is not in fact in a consistent state. index = count; while (0 <= --index) { const nsStyleChangeData* changeData; aChangeList.ChangeAt(index, &changeData); if (changeData->mFrame) { propTable->DeleteProperty(changeData->mFrame, nsGkAtoms::changeListProperty); } #ifdef DEBUG // reget frame from content since it may have been regenerated... if (changeData->mContent) { nsIFrame* frame = mPresShell->GetPrimaryFrameFor(changeData->mContent); if (frame) { mPresShell->FrameManager()->DebugVerifyStyleTree(frame); } } else { NS_WARNING("Unable to test style tree integrity -- no content node"); } #endif } aChangeList.Clear(); return NS_OK; } void nsCSSFrameConstructor::RestyleElement(nsIContent *aContent, nsIFrame *aPrimaryFrame, nsChangeHint aMinHint) { NS_ASSERTION(aPrimaryFrame == mPresShell->GetPrimaryFrameFor(aContent), "frame/content mismatch"); if (aPrimaryFrame && aPrimaryFrame->GetContent() != aContent) { // XXXbz this is due to image maps messing with the primary frame mapping. // See bug 135040. We can remove this block once that's fixed. aPrimaryFrame = nsnull; } NS_ASSERTION(!aPrimaryFrame || aPrimaryFrame->GetContent() == aContent, "frame/content mismatch"); if (aMinHint & nsChangeHint_ReconstructFrame) { RecreateFramesForContent(aContent); } else if (aPrimaryFrame) { nsStyleChangeList changeList; mPresShell->FrameManager()-> ComputeStyleChangeFor(aPrimaryFrame, &changeList, aMinHint); ProcessRestyledFrames(changeList); } else { // no frames, reconstruct for content MaybeRecreateFramesForContent(aContent); } } void nsCSSFrameConstructor::RestyleLaterSiblings(nsIContent *aContent) { nsIContent *parent = aContent->GetParent(); if (!parent) return; // root element has no later siblings for (PRInt32 index = parent->IndexOf(aContent) + 1, index_end = parent->GetChildCount(); index != index_end; ++index) { nsIContent *child = parent->GetChildAt(index); if (!child->IsNodeOfType(nsINode::eELEMENT)) continue; nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(child); RestyleElement(child, primaryFrame, NS_STYLE_HINT_NONE); } } nsresult nsCSSFrameConstructor::ContentStatesChanged(nsIContent* aContent1, nsIContent* aContent2, PRInt32 aStateMask) { DoContentStateChanged(aContent1, aStateMask); DoContentStateChanged(aContent2, aStateMask); return NS_OK; } void nsCSSFrameConstructor::DoContentStateChanged(nsIContent* aContent, PRInt32 aStateMask) { nsStyleSet *styleSet = mPresShell->StyleSet(); nsPresContext *presContext = mPresShell->GetPresContext(); NS_ASSERTION(styleSet, "couldn't get style set"); if (aContent) { nsChangeHint hint = NS_STYLE_HINT_NONE; // Any change to a content state that affects which frames we construct // must lead to a frame reconstruct here if we already have a frame. // Note that we never decide through non-CSS means to not create frames // based on content states, so if we already don't have a frame we don't // need to force a reframe -- if it's needed, the HasStateDependentStyle // call will handle things. nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(aContent); if (primaryFrame) { // If it's generated content, ignore LOADING/etc state changes on it. if (!primaryFrame->IsGeneratedContentFrame() && (aStateMask & (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED | NS_EVENT_STATE_LOADING))) { hint = nsChangeHint_ReconstructFrame; } else { PRUint8 app = primaryFrame->GetStyleDisplay()->mAppearance; if (app) { nsITheme *theme = presContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(presContext, primaryFrame, app)) { PRBool repaint = PR_FALSE; theme->WidgetStateChanged(primaryFrame, app, nsnull, &repaint); if (repaint) { NS_UpdateHint(hint, nsChangeHint_RepaintFrame); } } } } } nsReStyleHint rshint = styleSet->HasStateDependentStyle(presContext, aContent, aStateMask); if ((aStateMask & NS_EVENT_STATE_HOVER) && rshint != 0) { ++mHoverGeneration; } PostRestyleEvent(aContent, rshint, hint); } } nsresult nsCSSFrameConstructor::AttributeChanged(nsIContent* aContent, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aModType, PRUint32 aStateMask) { nsresult result = NS_OK; // Hold onto the PresShell to prevent ourselves from being destroyed. // XXXbz how, exactly, would this attribute change cause us to be // destroyed from inside this function? nsCOMPtr shell = mPresShell; // Get the frame associated with the content which is the highest in the frame tree nsIFrame* primaryFrame = shell->GetPrimaryFrameFor(aContent); #if 0 NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("HTMLStyleSheet::AttributeChanged: content=%p[%s] frame=%p", aContent, ContentTag(aContent, 0), frame)); #endif // the style tag has its own interpretation based on aHint nsChangeHint hint = aContent->GetAttributeChangeHint(aAttribute, aModType); PRBool reframe = (hint & nsChangeHint_ReconstructFrame) != 0; #ifdef MOZ_XUL // The following listbox widget trap prevents offscreen listbox widget // content from being removed and re-inserted (which is what would // happen otherwise). if (!primaryFrame && !reframe) { PRInt32 namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContent, &namespaceID); if (namespaceID == kNameSpaceID_XUL && (tag == nsGkAtoms::listitem || tag == nsGkAtoms::listcell)) return NS_OK; } if (aAttribute == nsGkAtoms::tooltiptext || aAttribute == nsGkAtoms::tooltip) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) { if (aModType == nsIDOMMutationEvent::REMOVAL) rootBox->RemoveTooltipSupport(aContent); if (aModType == nsIDOMMutationEvent::ADDITION) rootBox->AddTooltipSupport(aContent); } } #endif // MOZ_XUL if (primaryFrame) { // See if we have appearance information for a theme. const nsStyleDisplay* disp = primaryFrame->GetStyleDisplay(); if (disp->mAppearance) { nsPresContext* presContext = mPresShell->GetPresContext(); nsITheme *theme = presContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(presContext, primaryFrame, disp->mAppearance)) { PRBool repaint = PR_FALSE; theme->WidgetStateChanged(primaryFrame, disp->mAppearance, aAttribute, &repaint); if (repaint) NS_UpdateHint(hint, nsChangeHint_RepaintFrame); } } // let the frame deal with it now, so we don't have to deal later result = primaryFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType); // XXXwaterson should probably check for special IB siblings // here, and propagate the AttributeChanged notification to // them, as well. Currently, inline frames don't do anything on // this notification, so it's not that big a deal. } // See if we can optimize away the style re-resolution -- must be called after // the frame's AttributeChanged() in case it does something that affects the style nsFrameManager *frameManager = shell->FrameManager(); nsReStyleHint rshint = frameManager->HasAttributeDependentStyle(aContent, aAttribute, aModType, aStateMask); PostRestyleEvent(aContent, rshint, hint); return result; } void nsCSSFrameConstructor::BeginUpdate() { NS_SuppressFocusEvent(); ++mFocusSuppressCount; ++mUpdateCount; } void nsCSSFrameConstructor::EndUpdate() { if (mUpdateCount == 1) { // This is the end of our last update. Before we decrement // mUpdateCount, recalc quotes and counters as needed. RecalcQuotesAndCounters(); NS_ASSERTION(mUpdateCount == 1, "Odd update count"); } --mUpdateCount; if (mFocusSuppressCount) { NS_UnsuppressFocusEvent(); --mFocusSuppressCount; } } void nsCSSFrameConstructor::RecalcQuotesAndCounters() { if (mQuotesDirty) { mQuotesDirty = PR_FALSE; mQuoteList.RecalcAll(); } if (mCountersDirty) { mCountersDirty = PR_FALSE; mCounterManager.RecalcAll(); } NS_ASSERTION(!mQuotesDirty, "Quotes updates will be lost"); NS_ASSERTION(!mCountersDirty, "Counter updates will be lost"); } class nsFocusUnsuppressEvent : public nsRunnable { public: NS_DECL_NSIRUNNABLE nsFocusUnsuppressEvent(PRUint32 aCount) : mCount(aCount) {} private: PRUint32 mCount; }; NS_IMETHODIMP nsFocusUnsuppressEvent::Run() { while (mCount) { --mCount; NS_UnsuppressFocusEvent(); } return NS_OK; } void nsCSSFrameConstructor::WillDestroyFrameTree(PRBool aDestroyingPresShell) { #if defined(DEBUG_dbaron_off) mCounterManager.Dump(); #endif mIsDestroyingFrameTree = PR_TRUE; // Prevent frame tree destruction from being O(N^2) mQuoteList.Clear(); mCounterManager.Clear(); // Cancel all pending re-resolves mRestyleEvent.Revoke(); if (mFocusSuppressCount && aDestroyingPresShell) { nsRefPtr ev = new nsFocusUnsuppressEvent(mFocusSuppressCount); if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) { mFocusSuppressCount = 0; } } } //STATIC // XXXbz I'd really like this method to go away. Once we have inline-block and // I can just use that for sized broken images, that can happen, maybe. void nsCSSFrameConstructor::GetAlternateTextFor(nsIContent* aContent, nsIAtom* aTag, // content object's tag nsXPIDLString& aAltText) { // The "alt" attribute specifies alternate text that is rendered // when the image can not be displayed // If there's no "alt" attribute, and aContent is an input // element, then use the value of the "value" attribute if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aAltText) && nsGkAtoms::input == aTag) { // If there's no "value" attribute either, then use the localized string // for "Submit" as the alternate text. if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aAltText)) { nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", aAltText); } } } nsresult nsCSSFrameConstructor::CreateContinuingOuterTableFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame** aContinuingFrame) { nsIFrame* newFrame = NS_NewTableOuterFrame(aPresShell, aStyleContext); if (newFrame) { newFrame->Init(aContent, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Create a continuing inner table frame, and if there's a caption then // replicate the caption nsFrameItems newChildFrames; nsIFrame* childFrame = aFrame->GetFirstChild(nsnull); if (childFrame) { nsIFrame* continuingTableFrame; nsresult rv = CreateContinuingFrame(aPresContext, childFrame, newFrame, &continuingTableFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } newChildFrames.AddChild(continuingTableFrame); NS_ASSERTION(!childFrame->GetNextSibling(),"there can be only one inner table frame"); } // Set the outer table's initial child list newFrame->SetInitialChildList(nsnull, newChildFrames.childList); *aContinuingFrame = newFrame; return NS_OK; } else { *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::CreateContinuingTableFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame** aContinuingFrame) { nsIFrame* newFrame = NS_NewTableFrame(aPresShell, aStyleContext); if (newFrame) { newFrame->Init(aContent, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Replicate any header/footer frames nsFrameItems childFrames; nsIFrame* childFrame = aFrame->GetFirstChild(nsnull); for ( ; childFrame; childFrame = childFrame->GetNextSibling()) { // See if it's a header/footer, possibly wrapped in a scroll frame. nsTableRowGroupFrame* rowGroupFrame = nsTableFrame::GetRowGroupFrame(childFrame); if (rowGroupFrame) { // If the row group was continued, then don't replicate it. nsIFrame* rgNextInFlow = rowGroupFrame->GetNextInFlow(); if (rgNextInFlow) { rowGroupFrame->SetRepeatable(PR_FALSE); } else if (rowGroupFrame->IsRepeatable()) { // Replicate the header/footer frame. nsTableRowGroupFrame* headerFooterFrame; nsFrameItems childItems; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(newFrame), nsnull); headerFooterFrame = static_cast (NS_NewTableRowGroupFrame(aPresShell, rowGroupFrame->GetStyleContext())); nsIContent* headerFooter = rowGroupFrame->GetContent(); headerFooterFrame->Init(headerFooter, newFrame, nsnull); ProcessChildren(state, headerFooter, rowGroupFrame->GetStyleContext(), headerFooterFrame, PR_TRUE, childItems, PR_FALSE); NS_ASSERTION(!state.mFloatedItems.childList, "unexpected floated element"); headerFooterFrame->SetInitialChildList(nsnull, childItems.childList); headerFooterFrame->SetRepeatable(PR_TRUE); // Table specific initialization headerFooterFrame->InitRepeatedFrame(aPresContext, rowGroupFrame); // XXX Deal with absolute and fixed frames... childFrames.AddChild(headerFooterFrame); } } } // Set the table frame's initial child list newFrame->SetInitialChildList(nsnull, childFrames.childList); *aContinuingFrame = newFrame; return NS_OK; } else { *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } } nsresult nsCSSFrameConstructor::CreateContinuingFrame(nsPresContext* aPresContext, nsIFrame* aFrame, nsIFrame* aParentFrame, nsIFrame** aContinuingFrame, PRBool aIsFluid) { nsIPresShell* shell = aPresContext->PresShell(); nsStyleContext* styleContext = aFrame->GetStyleContext(); nsIFrame* newFrame = nsnull; nsresult rv = NS_OK; nsIFrame* nextContinuation = aFrame->GetNextContinuation(); nsIFrame* nextInFlow = aFrame->GetNextInFlow(); // Use the frame type to determine what type of frame to create nsIAtom* frameType = aFrame->GetType(); nsIContent* content = aFrame->GetContent(); NS_ASSERTION(aFrame->GetSplittableType() != NS_FRAME_NOT_SPLITTABLE, "why CreateContinuingFrame for a non-splittable frame?"); if (nsGkAtoms::textFrame == frameType) { newFrame = NS_NewContinuingTextFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::inlineFrame == frameType) { newFrame = NS_NewInlineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::blockFrame == frameType) { newFrame = NS_NewBlockFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } #ifdef MOZ_XUL } else if (nsGkAtoms::XULLabelFrame == frameType) { newFrame = NS_NewXULLabelFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } #endif } else if (nsGkAtoms::columnSetFrame == frameType) { newFrame = NS_NewColumnSetFrame(shell, styleContext, 0); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::positionedInlineFrame == frameType) { newFrame = NS_NewPositionedInlineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::pageFrame == frameType) { nsIFrame* canvasFrame; rv = ConstructPageFrame(shell, aPresContext, aParentFrame, aFrame, newFrame, canvasFrame); } else if (nsGkAtoms::tableOuterFrame == frameType) { rv = CreateContinuingOuterTableFrame(shell, aPresContext, aFrame, aParentFrame, content, styleContext, &newFrame); } else if (nsGkAtoms::tableFrame == frameType) { rv = CreateContinuingTableFrame(shell, aPresContext, aFrame, aParentFrame, content, styleContext, &newFrame); } else if (nsGkAtoms::tableRowGroupFrame == frameType) { newFrame = NS_NewTableRowGroupFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::tableRowFrame == frameType) { newFrame = NS_NewTableRowFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Create a continuing frame for each table cell frame nsFrameItems newChildList; nsIFrame* cellFrame = aFrame->GetFirstChild(nsnull); while (cellFrame) { // See if it's a table cell frame if (IS_TABLE_CELL(cellFrame->GetType())) { nsIFrame* continuingCellFrame; rv = CreateContinuingFrame(aPresContext, cellFrame, newFrame, &continuingCellFrame); if (NS_FAILED(rv)) { nsFrameList tmp(newChildList.childList); tmp.DestroyFrames(); newFrame->Destroy(); *aContinuingFrame = nsnull; return NS_ERROR_OUT_OF_MEMORY; } newChildList.AddChild(continuingCellFrame); } cellFrame = cellFrame->GetNextSibling(); } // Set the table cell's initial child list newFrame->SetInitialChildList(nsnull, newChildList.childList); } } else if (IS_TABLE_CELL(frameType)) { // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. newFrame = NS_NewTableCellFrame(shell, styleContext, IsBorderCollapse(aParentFrame)); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Create a continuing area frame nsIFrame* continuingBlockFrame; nsIFrame* blockFrame = aFrame->GetFirstChild(nsnull); rv = CreateContinuingFrame(aPresContext, blockFrame, newFrame, &continuingBlockFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } // Set the table cell's initial child list newFrame->SetInitialChildList(nsnull, continuingBlockFrame); } } else if (nsGkAtoms::lineFrame == frameType) { newFrame = NS_NewFirstLineFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::letterFrame == frameType) { newFrame = NS_NewFirstLetterFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else if (nsGkAtoms::imageFrame == frameType) { newFrame = NS_NewImageFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); } } else if (nsGkAtoms::imageControlFrame == frameType) { newFrame = NS_NewImageControlFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); } } else if (nsGkAtoms::placeholderFrame == frameType) { // create a continuing out of flow frame nsIFrame* oofFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame); nsIFrame* oofContFrame; rv = CreateContinuingFrame(aPresContext, oofFrame, aParentFrame, &oofContFrame); if (NS_FAILED(rv)) { *aContinuingFrame = nsnull; return rv; } // create a continuing placeholder frame rv = CreatePlaceholderFrameFor(shell, content, oofContFrame, styleContext, aParentFrame, aFrame, &newFrame); if (NS_FAILED(rv)) { oofContFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } } else if (nsGkAtoms::fieldSetFrame == frameType) { newFrame = NS_NewFieldSetFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); // Create a continuing area frame // XXXbz we really shouldn't have to do this by hand! nsIFrame* continuingBlockFrame; nsIFrame* blockFrame = GetFieldSetBlockFrame(aFrame); rv = CreateContinuingFrame(aPresContext, blockFrame, newFrame, &continuingBlockFrame); if (NS_FAILED(rv)) { newFrame->Destroy(); *aContinuingFrame = nsnull; return rv; } // Set the fieldset's initial child list newFrame->SetInitialChildList(nsnull, continuingBlockFrame); } } else if (nsGkAtoms::legendFrame == frameType) { newFrame = NS_NewLegendFrame(shell, styleContext); if (newFrame) { newFrame->Init(content, aParentFrame, aFrame); nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); } } else { NS_NOTREACHED("unexpected frame type"); *aContinuingFrame = nsnull; return NS_ERROR_UNEXPECTED; } *aContinuingFrame = newFrame; if (!newFrame) { return NS_ERROR_OUT_OF_MEMORY; } // Init() set newFrame to be a fluid continuation of aFrame. // If we want a non-fluid continuation, we need to call SetPrevContinuation() // to reset NS_FRAME_IS_FLUID_CONTINUATION. if (!aIsFluid) { newFrame->SetPrevContinuation(aFrame); } // A continuation of generated content is also generated content if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { newFrame->AddStateBits(NS_FRAME_GENERATED_CONTENT); } // A continuation of an out-of-flow is also an out-of-flow if (aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { newFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); } if (nextInFlow) { nextInFlow->SetPrevInFlow(newFrame); newFrame->SetNextInFlow(nextInFlow); } else if (nextContinuation) { nextContinuation->SetPrevContinuation(newFrame); newFrame->SetNextContinuation(nextContinuation); } return NS_OK; } nsresult nsCSSFrameConstructor::ReplicateFixedFrames(nsPageContentFrame* aParentFrame) { // Now deal with fixed-pos things.... They should appear on all pages, // so we want to move over the placeholders when processing the child // of the pageContentFrame. nsIFrame* prevPageContentFrame = aParentFrame->GetPrevInFlow(); if (!prevPageContentFrame) { return NS_OK; } nsIFrame* canvasFrame = aParentFrame->GetFirstChild(nsnull); nsIFrame* prevCanvasFrame = prevPageContentFrame->GetFirstChild(nsnull); if (!canvasFrame || !prevCanvasFrame) { // document's root element frame missing return NS_ERROR_UNEXPECTED; } nsFrameItems fixedPlaceholders; nsIFrame* firstFixed = prevPageContentFrame->GetFirstChild(nsGkAtoms::fixedList); if (!firstFixed) { return NS_OK; } // Don't allow abs-pos descendants of the fixed content to escape the content. // This should not normally be possible (because fixed-pos elements should // be absolute containers) but fixed-pos tables currently aren't abs-pos // containers. nsFrameConstructorState state(mPresShell, aParentFrame, nsnull, mRootElementFrame); // Iterate across fixed frames and replicate each whose placeholder is a // descendant of aFrame. (We don't want to explicitly copy placeholders that // are within fixed frames, because that would cause duplicates on the new // page - bug 389619) for (nsIFrame* fixed = firstFixed; fixed; fixed = fixed->GetNextSibling()) { nsIFrame* prevPlaceholder = nsnull; mPresShell->GetPlaceholderFrameFor(fixed, &prevPlaceholder); if (prevPlaceholder && nsLayoutUtils::IsProperAncestorFrame(prevCanvasFrame, prevPlaceholder)) { nsresult rv = ConstructFrame(state, fixed->GetContent(), canvasFrame, fixedPlaceholders); NS_ENSURE_SUCCESS(rv, rv); } } // Add the placeholders to our primary child list. // XXXbz this is a little screwed up, since the fixed frames will have // broken auto-positioning. Oh, well. NS_ASSERTION(!canvasFrame->GetFirstChild(nsnull), "leaking frames; doc root continuation must be empty"); canvasFrame->SetInitialChildList(nsnull, fixedPlaceholders.childList); return NS_OK; } static PRBool IsBindingAncestor(nsIContent* aContent, nsIContent* aBindingRoot) { while (PR_TRUE) { // Native-anonymous content doesn't contain insertion points, so // we don't need to search through it. if (aContent->IsRootOfNativeAnonymousSubtree()) return PR_FALSE; nsIContent* bindingParent = aContent->GetBindingParent(); if (!bindingParent) return PR_FALSE; if (bindingParent == aBindingRoot) return PR_TRUE; aContent = bindingParent; } } // Helper function that searches the immediate child frames // (and their children if the frames are "special") // for a frame that maps the specified content object nsIFrame* nsCSSFrameConstructor::FindFrameWithContent(nsFrameManager* aFrameManager, nsIFrame* aParentFrame, nsIContent* aParentContent, nsIContent* aContent, nsFindFrameHint* aHint) { NS_PRECONDITION(aParentFrame, "Must have a frame"); #ifdef NOISY_FINDFRAME FFWC_totalCount++; printf("looking for content=%p, given aParentFrame %p parentContent %p, hint is %s\n", aContent, aParentFrame, aParentContent, aHint ? "set" : "NULL"); #endif // Search for the frame in each child list that aParentFrame supports. nsIAtom* listName = nsnull; PRInt32 listIndex = 0; PRBool searchAgain; do { #ifdef NOISY_FINDFRAME FFWC_doLoop++; #endif nsIFrame* kidFrame = nsnull; searchAgain = PR_FALSE; // if we were given an hint, try to use it here to find a good // previous frame to start our search (|kidFrame|). if (aHint) { #ifdef NOISY_FINDFRAME printf(" hint frame is %p\n", aHint->mPrimaryFrameForPrevSibling); #endif // start with the primary frame for aContent's previous sibling kidFrame = aHint->mPrimaryFrameForPrevSibling; // But if it's out of flow, start from its placeholder. if (kidFrame && (kidFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) { kidFrame = aFrameManager->GetPlaceholderFrameFor(kidFrame); } if (kidFrame) { // then use the next sibling frame as our starting point if (kidFrame->GetNextSibling()) { kidFrame = kidFrame->GetNextSibling(); } else { // The hint frame had no next sibling. Try the next-in-flow or // special sibling of the parent of the hint frame (or its // associated placeholder). nsIFrame *parentFrame = kidFrame->GetParent(); kidFrame = nsnull; if (parentFrame) { parentFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(parentFrame); } if (parentFrame) { // Found it, continue the search with its first child. kidFrame = parentFrame->GetFirstChild(listName); // Leave |aParentFrame| as-is, since the only time we'll // reuse it is if the hint fails. } } #ifdef NOISY_FINDFRAME printf(" hint gives us kidFrame=%p with parent frame %p content %p\n", kidFrame, aParentFrame, aParentContent); #endif } } if (!kidFrame) { // we didn't have enough info to prune, start searching from the beginning kidFrame = aParentFrame->GetFirstChild(listName); } while (kidFrame) { // See if the child frame points to the content object we're // looking for nsIContent* kidContent = kidFrame->GetContent(); if (kidContent == aContent) { // We found a match. Return the out-of-flow if it's a placeholder. return nsPlaceholderFrame::GetRealFrameFor(kidFrame); } // only do this if there is content if (kidContent) { // We search the immediate children only, but if the child frame has // the same content pointer as its parent then we need to search its // child frames, too. // We also need to search if the child content is anonymous and scoped // to the parent content. // XXXldb What makes us continue the search once we're inside // the anonymous subtree? if (aParentContent == kidContent || (aParentContent && IsBindingAncestor(kidContent, aParentContent))) { #ifdef NOISY_FINDFRAME FFWC_recursions++; printf(" recursing with new parent set to kidframe=%p, parentContent=%p\n", kidFrame, aParentContent); #endif nsIFrame* matchingFrame = FindFrameWithContent(aFrameManager, nsPlaceholderFrame::GetRealFrameFor(kidFrame), aParentContent, aContent, nsnull); if (matchingFrame) { return matchingFrame; } } } kidFrame = kidFrame->GetNextSibling(); #ifdef NOISY_FINDFRAME if (kidFrame) { FFWC_doSibling++; printf(" searching sibling frame %p\n", kidFrame); } #endif } if (aHint) { // If we get here, and we had a hint, then we didn't find a frame. // The hint may have been a frame whose location in the frame tree // doesn't match the location of its corresponding element in the // DOM tree, e.g. a floated or absolutely positioned frame, or e.g. // a frame, in which case we'd be off in the weeds looking // through something other than the primary frame list. // Reboot the search from scratch, without the hint, but using the // null child list again. aHint = nsnull; searchAgain = PR_TRUE; } else { do { listName = aParentFrame->GetAdditionalChildListName(listIndex++); } while (IsOutOfFlowList(listName)); } } while (listName || searchAgain); return nsnull; } // Request to find the primary frame associated with a given content object. // This is typically called by the pres shell when there is no mapping in // the pres shell hash table nsresult nsCSSFrameConstructor::FindPrimaryFrameFor(nsFrameManager* aFrameManager, nsIContent* aContent, nsIFrame** aFrame, nsFindFrameHint* aHint) { NS_ASSERTION(aFrameManager && aContent && aFrame, "bad arg"); *aFrame = nsnull; // initialize OUT parameter // We want to be able to quickly map from a content object to its frame, // but we also want to keep the hash table small. Therefore, many frames // are not added to the hash table when they're first created: // - text frames // - inline frames (often things like FONT and B) // - BR frames // - internal table frames (row-group, row, cell, col-group, col) // // That means we need to need to search for the frame nsIFrame* parentFrame; // this pointer is used to iterate across all frames that map to parentContent // Get the frame that corresponds to the parent content object. // Note that this may recurse indirectly, because the pres shell will // call us back if there is no mapping in the hash table nsCOMPtr parentContent = aContent->GetParent(); // Get this once if (parentContent) { parentFrame = aFrameManager->GetPrimaryFrameFor(parentContent, -1); while (parentFrame) { // Search the child frames for a match *aFrame = FindFrameWithContent(aFrameManager, parentFrame, parentContent, aContent, aHint); #ifdef NOISY_FINDFRAME printf("FindFrameWithContent returned %p\n", *aFrame); #endif #ifdef DEBUG // if we're given a hint and we were told to verify, then compare the resulting frame with // the frame we get by calling FindFrameWithContent *without* the hint. // Assert if they do not match // Note that this makes finding frames *slower* than it was before the fix. if (gVerifyFastFindFrame && aHint) { #ifdef NOISY_FINDFRAME printf("VERIFYING...\n"); #endif nsIFrame *verifyTestFrame = FindFrameWithContent(aFrameManager, parentFrame, parentContent, aContent, nsnull); #ifdef NOISY_FINDFRAME printf("VERIFY returned %p\n", verifyTestFrame); #endif NS_ASSERTION(verifyTestFrame == *aFrame, "hint shortcut found wrong frame"); } #endif // If we found a match, then add a mapping to the hash table so // next time this will be quick if (*aFrame) { aFrameManager->SetPrimaryFrameFor(aContent, *aFrame); break; } // We didn't find a matching frame. If parentFrame has a next-in-flow // or special sibling, then continue looking there. parentFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(parentFrame); #ifdef NOISY_FINDFRAME if (parentFrame) { FFWC_nextInFlows++; printf(" searching NIF frame %p\n", parentFrame); } #endif } } #ifdef NOISY_FINDFRAME printf("%10s %10s %10s %10s %10s\n", "total", "doLoop", "doSibling", "recur", "nextIF"); printf("%10d %10d %10d %10d %10d\n", FFWC_totalCount, FFWC_doLoop, FFWC_doSibling, FFWC_recursions, FFWC_nextInFlows); #endif return NS_OK; } nsresult nsCSSFrameConstructor::GetInsertionPoint(nsIFrame* aParentFrame, nsIContent* aChildContent, nsIFrame** aInsertionPoint, PRBool* aMultiple) { // Make the insertion point be the parent frame by default, in case // we have to bail early. *aInsertionPoint = aParentFrame; nsIContent* container = aParentFrame->GetContent(); if (!container) return NS_OK; nsBindingManager *bindingManager = mDocument->BindingManager(); nsIContent* insertionElement; if (aChildContent) { // We've got an explicit insertion child. Check to see if it's // anonymous. if (aChildContent->GetBindingParent() == container) { // This child content is anonymous. Don't use the insertion // point, since that's only for the explicit kids. return NS_OK; } PRUint32 index; insertionElement = bindingManager->GetInsertionPoint(container, aChildContent, &index); } else { PRBool multiple; PRUint32 index; insertionElement = bindingManager->GetSingleInsertionPoint(container, &index, &multiple); if (multiple && aMultiple) *aMultiple = multiple; // Record the fact that filters are in use. } if (insertionElement) { nsIFrame* insertionPoint = mPresShell->GetPrimaryFrameFor(insertionElement); if (insertionPoint) { // Use the content insertion frame of the insertion point. insertionPoint = insertionPoint->GetContentInsertionFrame(); if (insertionPoint && insertionPoint != aParentFrame) GetInsertionPoint(insertionPoint, aChildContent, aInsertionPoint, aMultiple); } else { // There was no frame created yet for the insertion point. *aInsertionPoint = nsnull; } } // fieldsets have multiple insertion points. Note that we might // have to look at insertionElement here... if (aMultiple && !*aMultiple) { nsIContent* content = insertionElement ? insertionElement : container; if (content->IsNodeOfType(nsINode::eHTML) && content->Tag() == nsGkAtoms::fieldset) { *aMultiple = PR_TRUE; } } return NS_OK; } // Capture state for the frame tree rooted at the frame associated with the // content object, aContent nsresult nsCSSFrameConstructor::CaptureStateForFramesOf(nsIContent* aContent, nsILayoutHistoryState* aHistoryState) { nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (frame) { CaptureStateFor(frame, aHistoryState); } return NS_OK; } // Capture state for the frame tree rooted at aFrame. nsresult nsCSSFrameConstructor::CaptureStateFor(nsIFrame* aFrame, nsILayoutHistoryState* aHistoryState) { if (aFrame && aHistoryState) { mPresShell->FrameManager()->CaptureFrameState(aFrame, aHistoryState); } return NS_OK; } nsresult nsCSSFrameConstructor::MaybeRecreateFramesForContent(nsIContent* aContent) { nsresult result = NS_OK; nsFrameManager *frameManager = mPresShell->FrameManager(); nsStyleContext *oldContext = frameManager->GetUndisplayedContent(aContent); if (oldContext) { // The parent has a frame, so try resolving a new context. nsRefPtr newContext = mPresShell->StyleSet()-> ResolveStyleFor(aContent, oldContext->GetParent()); frameManager->ChangeUndisplayedContent(aContent, newContext); if (newContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_NONE) { result = RecreateFramesForContent(aContent); } } return result; } PRBool nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame(nsIFrame* aFrame, nsresult* aResult) { NS_PRECONDITION(aFrame, "Must have a frame"); NS_PRECONDITION(aFrame->GetParent(), "Frame shouldn't be root"); NS_PRECONDITION(aResult, "Null out param?"); NS_PRECONDITION(aFrame == aFrame->GetFirstContinuation(), "aFrame not the result of GetPrimaryFrameFor()?"); if (IsFrameSpecial(aFrame)) { // The removal functions can't handle removal of an {ib} split directly; we // need to rebuild the containing block. #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" is special\n"); } #endif *aResult = ReframeContainingBlock(aFrame); return PR_TRUE; } // We might still need to reconstruct things if the parent of aFrame is // special, since in that case the removal of aFrame might affect the // splitting of its parent. nsIFrame* parent = aFrame->GetParent(); if (!IsFrameSpecial(parent)) { return PR_FALSE; } // If aFrame is an inline, then it cannot possibly have caused the splitting. // If the frame is being reconstructed and being changed to a block, the // ContentInserted call will handle the containing block reframe. So in this // case, we don't need to reframe. if (IsInlineOutside(aFrame)) { return PR_FALSE; } // If aFrame is not the first or last block, then removing it is not // going to affect the splitting. if (aFrame != parent->GetFirstChild(nsnull) && aFrame->GetLastContinuation()->GetNextSibling()) { return PR_FALSE; } #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForIBSplitterFrame: " "frame="); nsFrame::ListTag(stdout, parent); printf(" is special\n"); } #endif *aResult = ReframeContainingBlock(parent); return PR_TRUE; } nsresult nsCSSFrameConstructor::RecreateFramesForContent(nsIContent* aContent) { // If there is no document, we don't want to recreate frames for it. (You // shouldn't generally be giving this method content without a document // anyway). // Rebuilding the frame tree can have bad effects, especially if it's the // frame tree for chrome (see bug 157322). NS_ENSURE_TRUE(aContent->GetDocument(), NS_ERROR_FAILURE); // Is the frame `special'? If so, we need to reframe the containing // block *here*, rather than trying to remove and re-insert the // content (which would otherwise result in *two* nested reframe // containing block from ContentRemoved() and ContentInserted(), // below!). We'd really like to optimize away one of those // containing block reframes, hence the code here. nsIFrame* frame = mPresShell->GetPrimaryFrameFor(aContent); if (frame && frame->IsFrameOfType(nsIFrame::eMathML)) { // Reframe the topmost MathML element to prevent exponential blowup // (see bug 397518) while (PR_TRUE) { nsIContent* parentContent = aContent->GetParent(); nsIFrame* parentContentFrame = mPresShell->GetPrimaryFrameFor(parentContent); if (!parentContentFrame || !parentContentFrame->IsFrameOfType(nsIFrame::eMathML)) break; aContent = parentContent; frame = parentContentFrame; } } if (frame) { nsIFrame* nonGeneratedAncestor = nsLayoutUtils::GetNonGeneratedAncestor(frame); if (nonGeneratedAncestor->GetContent() != aContent) { return RecreateFramesForContent(nonGeneratedAncestor->GetContent()); } } nsresult rv = NS_OK; if (frame && MaybeRecreateContainerForIBSplitterFrame(frame, &rv)) { return rv; } nsCOMPtr container = aContent->GetParent(); if (container) { // XXXbz what if this is anonymous content? PRInt32 indexInContainer = container->IndexOf(aContent); // Before removing the frames associated with the content object, // ask them to save their state onto a temporary state object. CaptureStateForFramesOf(aContent, mTempFrameTreeState); // Remove the frames associated with the content object on which // the attribute change occurred. PRBool didReconstruct; rv = ContentRemoved(container, aContent, indexInContainer, &didReconstruct); if (NS_SUCCEEDED(rv) && !didReconstruct) { // Now, recreate the frames associated with this content object. If // ContentRemoved triggered reconstruction, then we don't need to do this // because the frames will already have been built. rv = ContentInserted(container, aContent, indexInContainer, mTempFrameTreeState); } } else { // The content is the root node, so just rebuild the world. ReconstructDocElementHierarchy(); } #ifdef ACCESSIBILITY if (mPresShell->IsAccessibilityActive()) { PRUint32 event; if (frame) { nsIFrame *newFrame = mPresShell->GetPrimaryFrameFor(aContent); event = newFrame ? PRUint32(nsIAccessibleEvent::EVENT_ASYNCH_SIGNIFICANT_CHANGE) : PRUint32(nsIAccessibleEvent::EVENT_ASYNCH_HIDE); } else { event = nsIAccessibleEvent::EVENT_ASYNCH_SHOW; } // A significant enough change occured that this part // of the accessible tree is no longer valid. nsCOMPtr accService = do_GetService("@mozilla.org/accessibilityService;1"); if (accService) { accService->InvalidateSubtreeFor(mPresShell, aContent, event); } } #endif return rv; } ////////////////////////////////////////////////////////////////////// // Block frame construction code already_AddRefed nsCSSFrameConstructor::GetFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSPseudoElements::firstLetter, aStyleContext); } return nsnull; } already_AddRefed nsCSSFrameConstructor::GetFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSPseudoElements::firstLine, aStyleContext); } return nsnull; } // Predicate to see if a given content (block element) has // first-letter style applied to it. PRBool nsCSSFrameConstructor::ShouldHaveFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::firstLetter, mPresShell->GetPresContext()); } PRBool nsCSSFrameConstructor::HasFirstLetterStyle(nsIFrame* aBlockFrame) { NS_PRECONDITION(aBlockFrame, "Need a frame"); NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlockFrame), "Not a block frame?"); return (aBlockFrame->GetStateBits() & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0; } PRBool nsCSSFrameConstructor::ShouldHaveFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { PRBool hasFirstLine = nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::firstLine, mPresShell->GetPresContext()); if (hasFirstLine) { // But disable for fieldsets PRInt32 namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContent, &namespaceID); // This check must match the one in FindHTMLData. hasFirstLine = tag != nsGkAtoms::fieldset || (namespaceID != kNameSpaceID_XHTML && !aContent->IsNodeOfType(nsINode::eHTML)); } return hasFirstLine; } void nsCSSFrameConstructor::ShouldHaveSpecialBlockStyle(nsIContent* aContent, nsStyleContext* aStyleContext, PRBool* aHaveFirstLetterStyle, PRBool* aHaveFirstLineStyle) { *aHaveFirstLetterStyle = ShouldHaveFirstLetterStyle(aContent, aStyleContext); *aHaveFirstLineStyle = ShouldHaveFirstLineStyle(aContent, aStyleContext); } /* static */ const nsCSSFrameConstructor::PseudoParentData nsCSSFrameConstructor::sPseudoParentData[eParentTypeCount] = { { // Cell FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRow), &nsCSSFrameConstructor::ConstructTableCell), &nsCSSAnonBoxes::tableCell }, { // Row FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRowGroup), &nsCSSFrameConstructor::ConstructTableRow), &nsCSSAnonBoxes::tableRow }, { // Row group FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableRowGroupFrame), &nsCSSAnonBoxes::tableRowGroup }, { // Column group FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMEMAP | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableColGroupFrame), &nsCSSAnonBoxes::tableColGroup }, { // Table FULL_CTOR_FCDATA(FCDATA_SKIP_FRAMEMAP | FCDATA_USE_CHILD_ITEMS, &nsCSSFrameConstructor::ConstructTable), &nsCSSAnonBoxes::table } }; /* * This function works as follows: we walk through the child list (aItems) and * find items that cannot have aParentFrame as their parent. We wrap * continuous runs of such items into a FrameConstructionItem for a frame that * gets them closer to their desired parents. For example, a run of non-row * children of a row-group will get wrapped in a row. When we later construct * the frame for this wrapper (in this case for the row), it'll be the correct * parent for the cells in the set of items we wrapped or we'll wrap cells * around everything else. At the end of this method, aItems is guaranteed to * contain only items for frames that can be direct kids of aParentFrame. */ nsresult nsCSSFrameConstructor::CreateNeededTablePseudos(FrameConstructionItemList& aItems, nsIFrame* aParentFrame) { ParentType ourParentType = GetParentType(aParentFrame); if (aItems.AllWantParentType(ourParentType)) { // Nothing to do here return NS_OK; } FCItemIterator iter(aItems); do { NS_ASSERTION(!iter.IsDone(), "How did that happen?"); // Advance to the next item that wants a different parent type. while (iter.item().DesiredParentType() == ourParentType) { iter.Next(); if (iter.IsDone()) { // Nothing else to do here; we're finished return NS_OK; } } NS_ASSERTION(!iter.IsDone() && iter.item().DesiredParentType() != ourParentType, "Why did we stop?"); // Now we're pointing to the first child that wants a different parent // type. Except for generated content, we should have already enforced the // fact that no such items are whitespace (either in this method when // constructing wrapping items, or when constructing the original // FrameConstructionItemList). NS_ASSERTION(aParentFrame->IsGeneratedContentFrame() || !iter.item().mIsText || !iter.item().mContent->TextIsOnlyWhitespace(), "Why do we have whitespace under a known-table parent?"); // Now try to figure out what kids we can group together. We can generally // group everything that has a different desired parent type from us. Two // exceptions to this: // 1) If our parent type is table, we can't group columns with anything // else other than whitespace. // 2) Whitespace that lies between two things we can group should // be dropped, even if we can't group them with each other. // XXXbz it's not clear to me that rule 2 is a good one, it's not called // for by the (admittedly vague) spec, and in fact it leads to some pretty // crappy behavior if you have some inlines and whitespace as kids of a // table-row, say, but it's more or less what we used to do. More // precisely, we shipped all whitespace out to the nearest block parent of // the whole mess, sort of. In any case this aspect of things, and in fact // this whole function might need changes as the spec here gets // clarified... I happen to think we should not drop whitespace that comes // between things that want a block parent. FCItemIterator endIter(iter); /* iterator to find the end of the group */ ParentType groupingParentType = endIter.item().DesiredParentType(); // If we decide to, we could optimize this by checking whether // aItems.AllWantParentType(groupingParentType) and if so just setting // endIter to the end of the list, which is an O(1) operation. That // requires not dropping whitespace between items that want a block parent, // though, per the XXX comment above, since a whole bunch of spans and // whitespace would test true to all wanting a block parent. do { endIter.Next(); if (endIter.IsDone()) { break; } if (!aParentFrame->IsGeneratedContentFrame() && endIter.item().IsWhitespace()) { // Whitespace coming after some groupable items FCItemIterator textSkipIter(endIter); do { textSkipIter.Next(); } while (!textSkipIter.IsDone() && textSkipIter.item().IsWhitespace()); PRBool trailingSpace = textSkipIter.IsDone(); if (// Trailing whitespace we can't handle (trailingSpace && ourParentType != eTypeBlock) || // Whitespace before kids needing wrapping (!trailingSpace && textSkipIter.item().DesiredParentType() != ourParentType)) { // Drop all the whitespace here so that |endIter| now points to the // same thing as |textSkipIter|. This doesn't affect where |iter| // points, since that's guaranted to point to before endIter. do { endIter.DeleteItem(); } while (endIter != textSkipIter); NS_ASSERTION(endIter.IsDone() == trailingSpace, "endIter == skipIter now!"); if (trailingSpace) { break; // The loop advancing endIter } } } ParentType itemParentType = endIter.item().DesiredParentType(); if (itemParentType == ourParentType) { break; } if (ourParentType == eTypeTable && (itemParentType == eTypeColGroup) != (groupingParentType == eTypeColGroup)) { // Either we started with columns and now found something else, or vice // versa. In any case, end the grouping. break; } } while (1); NS_ASSERTION(iter != endIter, "How did that happen?"); // Now group together all the items between iter and endIter. The right // parent type to use depends on ourParentType. ParentType wrapperType; switch (ourParentType) { case eTypeBlock: wrapperType = eTypeTable; break; case eTypeRow: // The parent type for a cell is eTypeBlock, since that's what a cell // looks like to its kids. wrapperType = eTypeBlock; break; case eTypeRowGroup: wrapperType = eTypeRow; break; case eTypeTable: // Either colgroup or rowgroup, depending on what we're grouping. wrapperType = groupingParentType == eTypeColGroup ? eTypeColGroup : eTypeRowGroup; break; default: NS_NOTREACHED("Colgroups should be suppresing non-col child items"); break; } const PseudoParentData& pseudoData = sPseudoParentData[wrapperType]; nsIAtom* pseudoType = *pseudoData.mPseudoType; nsStyleContext* parentStyle = aParentFrame->GetStyleContext(); nsIContent* parentContent = aParentFrame->GetContent(); if (pseudoType == nsCSSAnonBoxes::table && parentStyle->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_INLINE) { pseudoType = nsCSSAnonBoxes::inlineTable; } nsRefPtr wrapperStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent, pseudoType, parentStyle); FrameConstructionItem* newItem = new FrameConstructionItem(&pseudoData.mFCData, // Use the content of our parent frame parentContent, // Lie about the tag; it doesn't matter anyway pseudoType, // The namespace does matter, however; it needs // to match that of our first child item to // match the old behavior iter.item().mNameSpaceID, wrapperStyle.forget()); if (!newItem) { return NS_ERROR_OUT_OF_MEMORY; } // Here we're cheating a tad... technically, table-internal items should be // inline if aParentFrame is inline, but they'll get wrapped in an // inline-table in the end, so it'll all work out. In any case, arguably // we don't need to maintain this state at this point... but it's better // to, I guess. newItem->mIsAllInline = newItem->mHasInlineEnds = newItem->mStyleContext->GetStyleDisplay()->IsInlineOutside(); // Eat up all items between |iter| and |endIter| and put them in our wrapper // Advances |iter| to point to |endIter|. iter.AppendItemsToList(endIter, newItem->mChildItems); iter.InsertItem(newItem); // Now |iter| points to the item that was the first one we didn't wrap; // loop and see whether we need to skip it or wrap it in something // different. } while (!iter.IsDone()); return NS_OK; } nsresult nsCSSFrameConstructor::ConstructFramesFromItemList(nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsIFrame* aParentFrame, nsFrameItems& aFrameItems) { nsresult rv = CreateNeededTablePseudos(aItems, aParentFrame); NS_ENSURE_SUCCESS(rv, rv); #ifdef DEBUG for (FCItemIterator iter(aItems); !iter.IsDone(); iter.Next()) { NS_ASSERTION(iter.item().DesiredParentType() == GetParentType(aParentFrame), "Needed pseudos didn't get created; expect bad things"); } #endif for (FCItemIterator iter(aItems); !iter.IsDone(); iter.Next()) { rv = ConstructFramesFromItem(aState, iter, aParentFrame, aFrameItems); NS_ENSURE_SUCCESS(rv, rv); } NS_ASSERTION(!aState.mHavePendingPopupgroup, "Should have proccessed it by now"); return NS_OK; } /** * Request to process the child content elements and create frames. * * @param aContent the content object whose child elements to process * @param aFrame the frame associated with aContent. This will be the * parent frame (both content and geometric) for the flowed * child frames */ nsresult nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aStyleContext, nsIFrame* aFrame, const PRBool aCanHaveGeneratedContent, nsFrameItems& aFrameItems, const PRBool aAllowBlockStyles) { NS_PRECONDITION(aFrame, "Must have parent frame here"); NS_PRECONDITION(aFrame->GetContentInsertionFrame() == aFrame, "Parent frame in ProcessChildren should be its own " "content insertion frame"); // XXXbz ideally, this would do all the pushing of various // containing blocks as needed, so callers don't have to do it... PRBool haveFirstLetterStyle = PR_FALSE, haveFirstLineStyle = PR_FALSE; if (aAllowBlockStyles) { ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); } // The logic here needs to match the logic in GetFloatContainingBlock() nsFrameConstructorSaveState floatSaveState; if (aFrame->IsFrameOfType(nsIFrame::eMathML) || aFrame->IsBoxFrame()) { aState.PushFloatContainingBlock(nsnull, floatSaveState); } else if (aFrame->IsFloatContainingBlock()) { aState.PushFloatContainingBlock(aFrame, floatSaveState); } FrameConstructionItemList itemsToConstruct; nsresult rv = NS_OK; // Create any anonymous frames we need here. This must happen before the // non-anonymous children are processed to ensure that popups are never // constructed before the popupset. nsAutoTArray anonymousItems; GetAnonymousContent(aContent, aFrame, anonymousItems); for (PRUint32 i = 0; i < anonymousItems.Length(); ++i) { #ifdef DEBUG nsIAnonymousContentCreator* creator = do_QueryFrame(aFrame); NS_ASSERTION(!creator || !creator->CreateFrameFor(anonymousItems[i]), "If you need to use CreateFrameFor, you need to call " "CreateAnonymousFrames manually and not follow the standard " "ProcessChildren() codepath for this frame"); #endif AddFrameConstructionItems(aState, anonymousItems[i], aFrame, itemsToConstruct); } if (!aFrame->IsLeaf() && mDocument->BindingManager()->ShouldBuildChildFrames(aContent)) { // :before/:after content should have the same style context parent // as normal kids. // Note that we don't use this style context for looking up things like // special block styles because in some cases involving table pseudo-frames // it has nothing to do with the parent frame's desired behavior. nsStyleContext* styleContext; if (aCanHaveGeneratedContent) { styleContext = nsFrame::CorrectStyleParentFrame(aFrame, nsnull)->GetStyleContext(); // Probe for generated content before CreateGeneratedContentItem(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::before, itemsToConstruct); } ChildIterator iter, last; for (ChildIterator::Init(aContent, &iter, &last); iter != last; ++iter) { AddFrameConstructionItems(aState, *iter, aFrame, itemsToConstruct); } if (aCanHaveGeneratedContent) { // Probe for generated content after CreateGeneratedContentItem(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::after, itemsToConstruct); } } rv = ConstructFramesFromItemList(aState, itemsToConstruct, aFrame, aFrameItems); NS_ENSURE_SUCCESS(rv, rv); NS_ASSERTION(!aAllowBlockStyles || !aFrame->IsBoxFrame(), "can't be both block and box"); if (haveFirstLetterStyle) { rv = WrapFramesInFirstLetterFrame(aContent, aFrame, aFrameItems); } if (haveFirstLineStyle) { rv = WrapFramesInFirstLineFrame(aState, aContent, aFrame, aFrameItems); } // We might end up with first-line frames that change // AnyKidsNeedBlockParent() without changing itemsToConstruct, but that // should never happen for cases whan aFrame->IsBoxFrame(). NS_ASSERTION(!haveFirstLineStyle || !aFrame->IsBoxFrame(), "Shouldn't have first-line style if we're a box"); NS_ASSERTION(!aFrame->IsBoxFrame() || itemsToConstruct.AnyItemsNeedBlockParent() == (AnyKidsNeedBlockParent(aFrameItems.childList) != nsnull), "Something went awry in our block parent calculations"); if (aFrame->IsBoxFrame() && itemsToConstruct.AnyItemsNeedBlockParent()) { // XXXbz we could do this on the FrameConstructionItemList level, // no? And if we cared we could look through the item list // instead of groveling through the framelist here.. nsIContent *badKid = AnyKidsNeedBlockParent(aFrameItems.childList); nsAutoString parentTag, kidTag; aContent->Tag()->ToString(parentTag); badKid->Tag()->ToString(kidTag); const PRUnichar* params[] = { parentTag.get(), kidTag.get() }; nsStyleContext *frameStyleContext = aFrame->GetStyleContext(); const nsStyleDisplay *display = frameStyleContext->GetStyleDisplay(); const char *message = (display->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX) ? "NeededToWrapXULInlineBox" : "NeededToWrapXUL"; nsContentUtils::ReportToConsole(nsContentUtils::eXUL_PROPERTIES, message, params, NS_ARRAY_LENGTH(params), mDocument->GetDocumentURI(), EmptyString(), 0, 0, // not useful nsIScriptError::warningFlag, "FrameConstructor"); nsRefPtr blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::mozXULAnonymousBlock, frameStyleContext); nsIFrame *blockFrame = NS_NewBlockFrame(mPresShell, blockSC); // We might, in theory, want to set NS_BLOCK_FLOAT_MGR and // NS_BLOCK_MARGIN_ROOT, but I think it's a bad idea given that // a real block placed here wouldn't get those set on it. InitAndRestoreFrame(aState, aContent, aFrame, nsnull, blockFrame, PR_FALSE); NS_ASSERTION(!blockFrame->HasView(), "need to do view reparenting"); for (nsIFrame *f = aFrameItems.childList; f; f = f->GetNextSibling()) { ReparentFrame(aState.mFrameManager, blockFrame, f); } blockFrame->AppendFrames(nsnull, aFrameItems.childList); aFrameItems = nsFrameItems(); aFrameItems.AddChild(blockFrame); aFrame->AddStateBits(NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK); } return rv; } //---------------------------------------------------------------------- // Support for :first-line style // Special routine to handle placing a list of frames into a block // frame that has first-line style. The routine ensures that the first // collection of inline frames end up in a first-line frame. // NOTE: aState may have containing block information related to a // different part of the frame tree than where the first line occurs. // In particular aState may be set up for where ContentInserted or // ContentAppended is inserting content, which may be some // non-first-in-flow continuation of the block to which the first-line // belongs. So this function needs to be careful about how it uses // aState. nsresult nsCSSFrameConstructor::WrapFramesInFirstLineFrame( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; // Find the first and last inline frame in aFrameItems nsIFrame* kid = aFrameItems.childList; nsIFrame* firstInlineFrame = nsnull; nsIFrame* lastInlineFrame = nsnull; while (kid) { if (IsInlineOutside(kid)) { if (!firstInlineFrame) firstInlineFrame = kid; lastInlineFrame = kid; } else { break; } kid = kid->GetNextSibling(); } // If we don't find any inline frames, then there is nothing to do if (!firstInlineFrame) { return rv; } // Create line frame nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> GetStyleContext(); nsRefPtr firstLineStyle = GetFirstLineStyle(aBlockContent, parentStyle); nsIFrame* lineFrame = NS_NewFirstLineFrame(mPresShell, firstLineStyle); if (lineFrame) { // Initialize the line frame rv = InitAndRestoreFrame(aState, aBlockContent, aBlockFrame, nsnull, lineFrame); // Mangle the list of frames we are giving to the block: first // chop the list in two after lastInlineFrame nsIFrame* secondBlockFrame = lastInlineFrame->GetNextSibling(); lastInlineFrame->SetNextSibling(nsnull); // The lineFrame will be the block's first child; the rest of the // frame list (after lastInlineFrame) will be the second and // subsequent children; join the list together and reset // aFrameItems appropriately. if (secondBlockFrame) { lineFrame->SetNextSibling(secondBlockFrame); } if (aFrameItems.childList == lastInlineFrame) { // Just in case the block had exactly one inline child aFrameItems.lastChild = lineFrame; } aFrameItems.childList = lineFrame; // Give the inline frames to the lineFrame after reparenting them kid = firstInlineFrame; NS_ASSERTION(lineFrame->GetStyleContext() == firstLineStyle, "Bogus style context on line frame"); while (kid) { ReparentFrame(aState.mFrameManager, lineFrame, kid); kid = kid->GetNextSibling(); } lineFrame->SetInitialChildList(nsnull, firstInlineFrame); } else { rv = NS_ERROR_OUT_OF_MEMORY; } return rv; } // Special routine to handle appending a new frame to a block frame's // child list. Takes care of placing the new frame into the right // place when first-line style is present. nsresult nsCSSFrameConstructor::AppendFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aFrameItems) { // It's possible that aBlockFrame needs to have a first-line frame // created because it doesn't currently have any children. nsIFrame* blockKid = aBlockFrame->GetFirstChild(nsnull); if (!blockKid) { return WrapFramesInFirstLineFrame(aState, aBlockContent, aBlockFrame, aFrameItems); } // Examine the last block child - if it's a first-line frame then // appended frames need special treatment. nsresult rv = NS_OK; nsFrameList blockFrames(blockKid); nsIFrame* lastBlockKid = blockFrames.LastChild(); if (lastBlockKid->GetType() != nsGkAtoms::lineFrame) { // No first-line frame at the end of the list, therefore there is // an interveening block between any first-line frame the frames // we are appending. Therefore, we don't need any special // treatment of the appended frames. return rv; } nsIFrame* lineFrame = lastBlockKid; // Find the first and last inline frame in aFrameItems nsIFrame* kid = aFrameItems.childList; nsIFrame* firstInlineFrame = nsnull; nsIFrame* lastInlineFrame = nsnull; while (kid) { if (IsInlineOutside(kid)) { if (!firstInlineFrame) firstInlineFrame = kid; lastInlineFrame = kid; } else { break; } kid = kid->GetNextSibling(); } // If we don't find any inline frames, then there is nothing to do if (!firstInlineFrame) { return rv; } // The inline frames get appended to the lineFrame. Make sure they // are reparented properly. nsIFrame* remainingFrames = lastInlineFrame->GetNextSibling(); lastInlineFrame->SetNextSibling(nsnull); kid = firstInlineFrame; while (kid) { ReparentFrame(aState.mFrameManager, lineFrame, kid); kid = kid->GetNextSibling(); } aState.mFrameManager->AppendFrames(lineFrame, nsnull, firstInlineFrame); // The remaining frames get appended to the block frame if (remainingFrames) { aFrameItems.childList = remainingFrames; } else { aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } return rv; } // Special routine to handle inserting a new frame into a block // frame's child list. Takes care of placing the new frame into the // right place when first-line style is present. nsresult nsCSSFrameConstructor::InsertFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aBlockFrame, nsIFrame** aParentFrame, nsIFrame* aPrevSibling, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; // XXXbz If you make this method actually do something, check to make sure // that the caller is passing what you expect. In particular, which content // is aContent? #if 0 nsIFrame* parentFrame = *aParentFrame; nsIFrame* newFrame = aFrameItems.childList; PRBool isInline = IsInlineOutside(newFrame); if (!aPrevSibling) { // Insertion will become the first frame. Two cases: we either // already have a first-line frame or we don't. nsIFrame* firstBlockKid = aBlockFrame->GetFirstChild(nsnull); if (firstBlockKid->GetType() == nsGkAtoms::lineFrame) { // We already have a first-line frame nsIFrame* lineFrame = firstBlockKid; if (isInline) { // Easy case: the new inline frame will go into the lineFrame. ReparentFrame(aState.mFrameManager, lineFrame, newFrame); aState.mFrameManager->InsertFrames(lineFrame, nsnull, nsnull, newFrame); // Since the frame is going into the lineFrame, don't let it // go into the block too. aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } else { // Harder case: We are about to insert a block level element // before the first-line frame. // XXX need a method to steal away frames from the line-frame } } else { // We do not have a first-line frame if (isInline) { // We now need a first-line frame to contain the inline frame. nsIFrame* lineFrame = NS_NewFirstLineFrame(firstLineStyle); if (!lineFrame) { rv = NS_ERROR_OUT_OF_MEMORY; } if (NS_SUCCEEDED(rv)) { // Lookup first-line style context nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> GetStyleContext(); nsRefPtr firstLineStyle = GetFirstLineStyle(aContent, parentStyle); // Initialize the line frame rv = InitAndRestoreFrame(aState, aContent, aBlockFrame, nsnull, lineFrame); // Make sure the caller inserts the lineFrame into the // blocks list of children. aFrameItems.childList = lineFrame; aFrameItems.lastChild = lineFrame; // Give the inline frames to the lineFrame after // reparenting them NS_ASSERTION(lineFrame->GetStyleContext() == firstLineStyle, "Bogus style context on line frame"); ReparentFrame(aPresContext, lineFrame, newFrame); lineFrame->SetInitialChildList(nsnull, newFrame); } } else { // Easy case: the regular insertion logic can insert the new // frame because it's a block frame. } } } else { // Insertion will not be the first frame. nsIFrame* prevSiblingParent = aPrevSibling->GetParent(); if (prevSiblingParent == aBlockFrame) { // Easy case: The prev-siblings parent is the block // frame. Therefore the prev-sibling is not currently in a // line-frame. Therefore the new frame which is going after it, // regardless of type, is not going into a line-frame. } else { // If the prevSiblingParent is not the block-frame then it must // be a line-frame (if it were a letter-frame, that logic would // already have adjusted the prev-sibling to be the // letter-frame). if (isInline) { // Easy case: the insertion can go where the caller thinks it // should go (which is into prevSiblingParent). } else { // Block elements don't end up in line-frames, therefore // change the insertion point to aBlockFrame. However, there // might be more inline elements following aPrevSibling that // need to be pulled out of the line-frame and become children // of the block. nsIFrame* nextSibling = aPrevSibling->GetNextSibling(); nsIFrame* nextLineFrame = prevSiblingParent->GetNextInFlow(); if (nextSibling || nextLineFrame) { // Oy. We have work to do. Create a list of the new frames // that are going into the block by stripping them away from // the line-frame(s). nsFrameList list(nextSibling); if (nextSibling) { nsLineFrame* lineFrame = (nsLineFrame*) prevSiblingParent; lineFrame->StealFramesFrom(nextSibling); } nsLineFrame* nextLineFrame = (nsLineFrame*) lineFrame; for (;;) { nextLineFrame = nextLineFrame->GetNextInFlow(); if (!nextLineFrame) { break; } nsIFrame* kids = nextLineFrame->GetFirstChild(nsnull); } } else { // We got lucky: aPrevSibling was the last inline frame in // the line-frame. ReparentFrame(aState.mFrameManager, aBlockFrame, newFrame); aState.mFrameManager->InsertFrames(aBlockFrame, nsnull, prevSiblingParent, newFrame); aFrameItems.childList = nsnull; aFrameItems.lastChild = nsnull; } } } } #endif return rv; } //---------------------------------------------------------------------- // First-letter support // Determine how many characters in the text fragment apply to the // first letter static PRInt32 FirstLetterCount(const nsTextFragment* aFragment) { PRInt32 count = 0; PRInt32 firstLetterLength = 0; PRBool done = PR_FALSE; PRInt32 i, n = aFragment->GetLength(); for (i = 0; i < n; i++) { PRUnichar ch = aFragment->CharAt(i); if (XP_IS_SPACE(ch)) { if (firstLetterLength) { done = PR_TRUE; break; } count++; continue; } // XXX I18n if ((ch == '\'') || (ch == '\"')) { if (firstLetterLength) { done = PR_TRUE; break; } // keep looping firstLetterLength = 1; } else { count++; done = PR_TRUE; break; } } return count; } static PRBool NeedFirstLetterContinuation(nsIContent* aContent) { NS_PRECONDITION(aContent, "null ptr"); PRBool result = PR_FALSE; if (aContent) { const nsTextFragment* frag = aContent->GetText(); if (frag) { PRInt32 flc = FirstLetterCount(frag); PRInt32 tl = frag->GetLength(); if (flc < tl) { result = PR_TRUE; } } } return result; } static PRBool IsFirstLetterContent(nsIContent* aContent) { return aContent->TextLength() && !aContent->TextIsOnlyWhitespace(); } /** * Create a letter frame, only make it a floating frame. */ void nsCSSFrameConstructor::CreateFloatingLetterFrame( nsFrameConstructorState& aState, nsIFrame* aBlockFrame, nsIContent* aTextContent, nsIFrame* aTextFrame, nsIContent* aBlockContent, nsIFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aResult) { // Create the first-letter-frame nsresult rv; nsIFrame* letterFrame; nsStyleSet *styleSet = mPresShell->StyleSet(); letterFrame = NS_NewFirstLetterFrame(mPresShell, aStyleContext); // We don't want to use a text content for a non-text frame (because we want // its primary frame to be a text frame). So use its parent for the // first-letter. nsIContent* letterContent = aTextContent->GetParent(); InitAndRestoreFrame(aState, letterContent, aState.GetGeometricParent(aStyleContext->GetStyleDisplay(), aParentFrame), nsnull, letterFrame); // Init the text frame to refer to the letter frame. Make sure we // get a proper style context for it (the one passed in is for the // letter frame and will have the float property set on it; the text // frame shouldn't have that set). nsRefPtr textSC; textSC = styleSet->ResolveStyleForNonElement(aStyleContext); aTextFrame->SetStyleContextWithoutNotification(textSC); InitAndRestoreFrame(aState, aTextContent, letterFrame, nsnull, aTextFrame); // And then give the text frame to the letter frame letterFrame->SetInitialChildList(nsnull, aTextFrame); // See if we will need to continue the text frame (does it contain // more than just the first-letter text or not?) If it does, then we // create (in advance) a continuation frame for it. nsIFrame* nextTextFrame = nsnull; if (NeedFirstLetterContinuation(aTextContent)) { // Create continuation rv = CreateContinuingFrame(aState.mPresContext, aTextFrame, aParentFrame, &nextTextFrame); if (NS_FAILED(rv)) { letterFrame->Destroy(); return; } // Repair the continuations style context nsStyleContext* parentStyleContext = aStyleContext->GetParent(); if (parentStyleContext) { nsRefPtr newSC; newSC = styleSet->ResolveStyleForNonElement(parentStyleContext); if (newSC) { nextTextFrame->SetStyleContext(newSC); } } } NS_ASSERTION(aResult.childList == nsnull, "aResult should be an empty nsFrameItems!"); nsIFrame* insertAfter = nsnull; nsIFrame* f; // Put the new float before any of the floats in the block we're // doing first-letter for, that is, before any floats whose parent is aBlockFrame for (f = aState.mFloatedItems.childList; f; f = f->GetNextSibling()) { if (f->GetParent() == aBlockFrame) break; insertAfter = f; } rv = aState.AddChild(letterFrame, aResult, letterContent, aStyleContext, aParentFrame, PR_FALSE, PR_TRUE, PR_FALSE, PR_TRUE, insertAfter); if (nextTextFrame) { if (NS_FAILED(rv)) { nextTextFrame->Destroy(); } else { aResult.AddChild(nextTextFrame); } } } /** * Create a new letter frame for aTextFrame. The letter frame will be * a child of aParentFrame. */ nsresult nsCSSFrameConstructor::CreateLetterFrame(nsIFrame* aBlockFrame, nsIContent* aTextContent, nsIFrame* aParentFrame, nsFrameItems& aResult) { NS_PRECONDITION(aTextContent->IsNodeOfType(nsINode::eTEXT), "aTextContent isn't text"); NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlockFrame), "Not a block frame?"); // Get style context for the first-letter-frame nsStyleContext* parentStyleContext = nsFrame::CorrectStyleParentFrame(aParentFrame, nsCSSPseudoElements::firstLetter)-> GetStyleContext(); // Use content from containing block so that we can actually // find a matching style rule. nsIContent* blockContent = aBlockFrame->GetContent(); // Create first-letter style rule nsRefPtr sc = GetFirstLetterStyle(blockContent, parentStyleContext); if (sc) { nsRefPtr textSC; textSC = mPresShell->StyleSet()->ResolveStyleForNonElement(sc); // Create a new text frame (the original one will be discarded) // pass a temporary stylecontext, the correct one will be set later nsIFrame* textFrame = NS_NewTextFrame(mPresShell, textSC); NS_ASSERTION(aBlockFrame == GetFloatContainingBlock(aParentFrame), "Containing block is confused"); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(aParentFrame), aBlockFrame); // Create the right type of first-letter frame const nsStyleDisplay* display = sc->GetStyleDisplay(); if (display->IsFloating()) { // Make a floating first-letter frame CreateFloatingLetterFrame(state, aBlockFrame, aTextContent, textFrame, blockContent, aParentFrame, sc, aResult); } else { // Make an inflow first-letter frame nsIFrame* letterFrame = NS_NewFirstLetterFrame(mPresShell, sc); if (letterFrame) { // Initialize the first-letter-frame. We don't want to use a text // content for a non-text frame (because we want its primary frame to // be a text frame). So use its parent for the first-letter. nsIContent* letterContent = aTextContent->GetParent(); letterFrame->Init(letterContent, aParentFrame, nsnull); InitAndRestoreFrame(state, aTextContent, letterFrame, nsnull, textFrame); letterFrame->SetInitialChildList(nsnull, textFrame); aResult.childList = aResult.lastChild = letterFrame; aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); } } } return NS_OK; } nsresult nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsIContent* aBlockContent, nsIFrame* aBlockFrame, nsFrameItems& aBlockFrames) { nsresult rv = NS_OK; aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); nsIFrame* parentFrame = nsnull; nsIFrame* textFrame = nsnull; nsIFrame* prevFrame = nsnull; nsFrameItems letterFrames; PRBool stopLooking = PR_FALSE; rv = WrapFramesInFirstLetterFrame(aBlockFrame, aBlockFrame, aBlockFrames.childList, &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (NS_FAILED(rv)) { return rv; } if (parentFrame) { if (parentFrame == aBlockFrame) { // Text textFrame out of the blocks frame list and substitute the // letter frame(s) instead. nsIFrame* nextSibling = textFrame->GetNextSibling(); textFrame->SetNextSibling(nsnull); if (prevFrame) { prevFrame->SetNextSibling(letterFrames.childList); } else { aBlockFrames.childList = letterFrames.childList; } letterFrames.lastChild->SetNextSibling(nextSibling); // Destroy the old textFrame textFrame->Destroy(); // Repair lastChild; the only time this needs to happen is when // the block had one child (the text frame). if (!nextSibling) { aBlockFrames.lastChild = letterFrames.lastChild; } } else { // Take the old textFrame out of the inline parents child list ::DeletingFrameSubtree(mPresShell->FrameManager(), textFrame); parentFrame->RemoveFrame(nsnull, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList); } } return rv; } nsresult nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsIFrame* aBlockFrame, nsIFrame* aParentFrame, nsIFrame* aParentFrameList, nsIFrame** aModifiedParent, nsIFrame** aTextFrame, nsIFrame** aPrevFrame, nsFrameItems& aLetterFrames, PRBool* aStopLooking) { nsresult rv = NS_OK; nsIFrame* prevFrame = nsnull; nsIFrame* frame = aParentFrameList; while (frame) { nsIFrame* nextFrame = frame->GetNextSibling(); nsIAtom* frameType = frame->GetType(); if (nsGkAtoms::textFrame == frameType) { // Wrap up first-letter content in a letter frame nsIContent* textContent = frame->GetContent(); if (IsFirstLetterContent(textContent)) { // Create letter frame to wrap up the text rv = CreateLetterFrame(aBlockFrame, textContent, aParentFrame, aLetterFrames); if (NS_FAILED(rv)) { return rv; } // Provide adjustment information for parent *aModifiedParent = aParentFrame; *aTextFrame = frame; *aPrevFrame = prevFrame; *aStopLooking = PR_TRUE; return NS_OK; } } else if (IsInlineFrame(frame) && frameType != nsGkAtoms::brFrame) { nsIFrame* kids = frame->GetFirstChild(nsnull); WrapFramesInFirstLetterFrame(aBlockFrame, frame, kids, aModifiedParent, aTextFrame, aPrevFrame, aLetterFrames, aStopLooking); if (*aStopLooking) { return NS_OK; } } else { // This will stop us looking to create more letter frames. For // example, maybe the frame-type is "letterFrame" or // "placeholderFrame". This keeps us from creating extra letter // frames, and also prevents us from creating letter frames when // the first real content child of a block is not text (e.g. an // image, hr, etc.) *aStopLooking = PR_TRUE; break; } prevFrame = frame; frame = nextFrame; } return rv; } nsresult nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames( nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aBlockFrame, PRBool* aStopLooking) { // First look for the float frame that is a letter frame nsIFrame* floatFrame = aBlockFrame->GetFirstChild(nsGkAtoms::floatList); while (floatFrame) { // See if we found a floating letter frame if (nsGkAtoms::letterFrame == floatFrame->GetType()) { break; } floatFrame = floatFrame->GetNextSibling(); } if (!floatFrame) { // No such frame return NS_OK; } // Take the text frame away from the letter frame (so it isn't // destroyed when we destroy the letter frame). nsIFrame* textFrame = floatFrame->GetFirstChild(nsnull); if (!textFrame) { return NS_OK; } // Discover the placeholder frame for the letter frame nsIFrame* parentFrame; nsPlaceholderFrame* placeholderFrame = aFrameManager->GetPlaceholderFrameFor(floatFrame); if (!placeholderFrame) { // Somethings really wrong return NS_OK; } parentFrame = placeholderFrame->GetParent(); if (!parentFrame) { // Somethings really wrong return NS_OK; } // Create a new text frame with the right style context that maps // all of the content that was previously part of the letter frame // (and probably continued elsewhere). nsStyleContext* parentSC = parentFrame->GetStyleContext(); if (!parentSC) { return NS_OK; } nsIContent* textContent = textFrame->GetContent(); if (!textContent) { return NS_OK; } nsRefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); if (!newSC) { return NS_OK; } nsIFrame* newTextFrame = NS_NewTextFrame(aPresShell, newSC); if (NS_UNLIKELY(!newTextFrame)) { return NS_ERROR_OUT_OF_MEMORY;; } newTextFrame->Init(textContent, parentFrame, nsnull); // Destroy the old text frame's continuations (the old text frame // will be destroyed when its letter frame is destroyed). nsIFrame* nextTextFrame = textFrame->GetNextContinuation(); while (nextTextFrame) { nsIFrame* nextTextParent = nextTextFrame->GetParent(); if (nextTextParent) { nsSplittableFrame::RemoveFromFlow(nextTextFrame); ::DeletingFrameSubtree(aFrameManager, nextTextFrame); aFrameManager->RemoveFrame(nextTextParent, nsnull, nextTextFrame); } nextTextFrame = textFrame->GetNextContinuation(); } // First find out where (in the content) the placeholder frames // text is and its previous sibling frame, if any. Note that: // 1) The placeholder had better be in the principal child list of // parentFrame. // 2) It's probably near the beginning (since we're a first-letter frame), // so just doing a linear search for the prevSibling is ok. // 3) Trying to use FindPreviousSibling will fail if the first-letter is in // anonymous content (eg generated content). nsFrameList siblingList(parentFrame->GetFirstChild(nsnull)); NS_ASSERTION(siblingList.ContainsFrame(placeholderFrame), "Placeholder not in parent's principal child list?"); nsIFrame* prevSibling = siblingList.GetPrevSiblingFor(placeholderFrame); // Now that everything is set... #ifdef NOISY_FIRST_LETTER printf("RemoveFloatingFirstLetterFrames: textContent=%p oldTextFrame=%p newTextFrame=%p\n", textContent.get(), textFrame, newTextFrame); #endif UnregisterPlaceholderChain(aFrameManager, placeholderFrame); // Remove the float frame ::DeletingFrameSubtree(aFrameManager, floatFrame); aFrameManager->RemoveFrame(aBlockFrame, nsGkAtoms::floatList, floatFrame); // Remove placeholder frame ::DeletingFrameSubtree(aFrameManager, placeholderFrame); aFrameManager->RemoveFrame(parentFrame, nsnull, placeholderFrame); // Insert text frame in its place aFrameManager->InsertFrames(parentFrame, nsnull, prevSibling, newTextFrame); return NS_OK; } nsresult nsCSSFrameConstructor::RemoveFirstLetterFrames(nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aFrame, PRBool* aStopLooking) { nsIFrame* prevSibling = nsnull; nsIFrame* kid = aFrame->GetFirstChild(nsnull); while (kid) { if (nsGkAtoms::letterFrame == kid->GetType()) { // Bingo. Found it. First steal away the text frame. nsIFrame* textFrame = kid->GetFirstChild(nsnull); if (!textFrame) { break; } // Create a new textframe nsStyleContext* parentSC = aFrame->GetStyleContext(); if (!parentSC) { break; } nsIContent* textContent = textFrame->GetContent(); if (!textContent) { break; } nsRefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); if (!newSC) { break; } textFrame = NS_NewTextFrame(aPresShell, newSC); textFrame->Init(textContent, aFrame, nsnull); // Next rip out the kid and replace it with the text frame ::DeletingFrameSubtree(aFrameManager, kid); aFrameManager->RemoveFrame(aFrame, nsnull, kid); // Insert text frame in its place aFrameManager->InsertFrames(aFrame, nsnull, prevSibling, textFrame); *aStopLooking = PR_TRUE; aFrame->RemoveStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); break; } else if (IsInlineFrame(kid)) { // Look inside child inline frame for the letter frame RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager, kid, aStopLooking); if (*aStopLooking) { break; } } prevSibling = kid; kid = kid->GetNextSibling(); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveLetterFrames(nsPresContext* aPresContext, nsIPresShell* aPresShell, nsFrameManager* aFrameManager, nsIFrame* aBlockFrame) { aBlockFrame = aBlockFrame->GetFirstContinuation(); PRBool stopLooking = PR_FALSE; nsresult rv; do { rv = RemoveFloatingFirstLetterFrames(aPresContext, aPresShell, aFrameManager, aBlockFrame, &stopLooking); if (NS_SUCCEEDED(rv) && !stopLooking) { rv = RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager, aBlockFrame, &stopLooking); } if (stopLooking) { break; } aBlockFrame = aBlockFrame->GetNextContinuation(); } while (aBlockFrame); return rv; } // Fixup the letter frame situation for the given block nsresult nsCSSFrameConstructor::RecoverLetterFrames(nsIFrame* aBlockFrame) { aBlockFrame = aBlockFrame->GetFirstContinuation(); nsIFrame* parentFrame = nsnull; nsIFrame* textFrame = nsnull; nsIFrame* prevFrame = nsnull; nsFrameItems letterFrames; PRBool stopLooking = PR_FALSE; nsresult rv; do { // XXX shouldn't this bit be set already (bug 408493), assert instead? aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); rv = WrapFramesInFirstLetterFrame(aBlockFrame, aBlockFrame, aBlockFrame->GetFirstChild(nsnull), &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (NS_FAILED(rv)) { return rv; } if (stopLooking) { break; } aBlockFrame = aBlockFrame->GetNextContinuation(); } while (aBlockFrame); if (parentFrame) { // Take the old textFrame out of the parents child list ::DeletingFrameSubtree(mPresShell->FrameManager(), textFrame); parentFrame->RemoveFrame(nsnull, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList); } return rv; } //---------------------------------------------------------------------- // listbox Widget Routines nsresult nsCSSFrameConstructor::CreateListBoxContent(nsPresContext* aPresContext, nsIFrame* aParentFrame, nsIFrame* aPrevFrame, nsIContent* aChild, nsIFrame** aNewFrame, PRBool aIsAppend, PRBool aIsScrollbar, nsILayoutHistoryState* aFrameState) { #ifdef MOZ_XUL nsresult rv = NS_OK; // Construct a new frame if (nsnull != aParentFrame) { nsFrameItems frameItems; nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(aParentFrame), GetFloatContainingBlock(aParentFrame), mTempFrameTreeState); nsRefPtr styleContext; styleContext = ResolveStyleContext(aParentFrame, aChild); // Pre-check for display "none" - only if we find that, do we create // any frame at all const nsStyleDisplay* display = styleContext->GetStyleDisplay(); if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { *aNewFrame = nsnull; return NS_OK; } BeginUpdate(); FrameConstructionItemList items; AddFrameConstructionItemsInternal(state, aChild, aParentFrame, aChild->Tag(), aChild->GetNameSpaceID(), styleContext, ITEM_ALLOW_XBL_BASE, items); ConstructFramesFromItemList(state, items, aParentFrame, frameItems); nsIFrame* newFrame = frameItems.childList; *aNewFrame = newFrame; if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) { // Notify the parent frame if (aIsAppend) rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxAppendFrames(newFrame); else rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxInsertFrames(aPrevFrame, newFrame); } EndUpdate(); } return rv; #else return NS_ERROR_FAILURE; #endif } //---------------------------------------- nsresult nsCSSFrameConstructor::ConstructBlock(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsIContent* aContent, nsIFrame* aParentFrame, nsIFrame* aContentParentFrame, nsStyleContext* aStyleContext, nsIFrame** aNewFrame, nsFrameItems& aFrameItems, PRBool aAbsPosContainer) { // Create column wrapper if necessary nsIFrame* blockFrame = *aNewFrame; nsIFrame* parent = aParentFrame; nsRefPtr blockStyle = aStyleContext; const nsStyleColumn* columns = aStyleContext->GetStyleColumn(); if (columns->mColumnCount != NS_STYLE_COLUMN_COUNT_AUTO || columns->mColumnWidth.GetUnit() != eStyleUnit_Auto) { nsIFrame* columnSetFrame = nsnull; columnSetFrame = NS_NewColumnSetFrame(mPresShell, aStyleContext, 0); if (!columnSetFrame) { return NS_ERROR_OUT_OF_MEMORY; } InitAndRestoreFrame(aState, aContent, aParentFrame, nsnull, columnSetFrame); // See if we need to create a view nsHTMLContainerFrame::CreateViewForFrame(columnSetFrame, PR_FALSE); blockStyle = mPresShell->StyleSet()-> ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::columnContent, aStyleContext); parent = columnSetFrame; *aNewFrame = columnSetFrame; columnSetFrame->SetInitialChildList(nsnull, blockFrame); } blockFrame->SetStyleContextWithoutNotification(blockStyle); InitAndRestoreFrame(aState, aContent, parent, nsnull, blockFrame); nsresult rv = aState.AddChild(*aNewFrame, aFrameItems, aContent, aStyleContext, aContentParentFrame ? aContentParentFrame : aParentFrame); if (NS_FAILED(rv)) { return rv; } // See if we need to create a view, e.g. the frame is absolutely positioned nsHTMLContainerFrame::CreateViewForFrame(blockFrame, PR_FALSE); if (!mRootElementFrame) { // The frame we're constructing will be the root element frame. // Set mRootElementFrame before processing children. mRootElementFrame = *aNewFrame; } // We should make the outer frame be the absolute containing block, // if one is required. We have to do this because absolute // positioning must be computed with respect to the CSS dimensions // of the element, which are the dimensions of the outer block. But // we can't really do that because only blocks can have absolute // children. So use the block and try to compensate with hacks // in nsBlockFrame::CalculateContainingBlockSizeForAbsolutes. nsFrameConstructorSaveState absoluteSaveState; if (aAbsPosContainer) { // NS_ASSERTION(aRelPos, "should have made area frame for this"); aState.PushAbsoluteContainingBlock(blockFrame, absoluteSaveState); } // Process the child content nsFrameItems childItems; rv = ProcessChildren(aState, aContent, aStyleContext, blockFrame, PR_TRUE, childItems, PR_TRUE); // Set the frame's initial child list blockFrame->SetInitialChildList(nsnull, childItems.childList); return rv; } nsresult nsCSSFrameConstructor::ConstructInline(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsIFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, nsIFrame** aNewFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsIFrame *newFrame; PRBool positioned = NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay && (NS_STYLE_POSITION_RELATIVE == aDisplay->mPosition || aDisplay->HasTransform()); if (positioned) { newFrame = NS_NewPositionedInlineFrame(mPresShell, styleContext); } else { newFrame = NS_NewInlineFrame(mPresShell, styleContext); } // Initialize the frame InitAndRestoreFrame(aState, content, aParentFrame, nsnull, newFrame); nsFrameConstructorSaveState absoluteSaveState; // definition cannot be inside next block // because the object's destructor is significant // this is part of the fix for bug 42372 // Any inline frame might need a view (because of opacity, or fixed background) nsHTMLContainerFrame::CreateViewForFrame(newFrame, PR_FALSE); if (positioned) { // Relatively positioned frames becomes a container for child // frames that are positioned aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState); } // Process the child content nsFrameItems childItems; nsresult rv = ConstructFramesFromItemList(aState, aItem.mChildItems, newFrame, childItems); if (NS_FAILED(rv)) { // Clean up? return rv; } nsIFrame* list1 = childItems.childList; nsIFrame* prevToFirstBlock; nsIFrame* list2; if (aItem.mIsAllInline || // Note: This really is meant to be an assignment to list2 followed by a // test of !list2. !(list2 = FindFirstBlock(list1, &prevToFirstBlock))) { // This part is easy. We either already know we have no non-inline kids, // or haven't found any when constructing actual frames (the latter can // happen only if out-of-flows that we thought had no containing block // acquired one when ancestor inline frames and {ib} splits got // constructed). Just put all the kids into the single inline frame and // bail. newFrame->SetInitialChildList(nsnull, childItems.childList); if (NS_SUCCEEDED(rv)) { aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); *aNewFrame = newFrame; } return rv; } // This inline frame contains several types of children. Therefore // this frame has to be chopped into several pieces. We will produce // as a result of this 3 lists of children. The first list contains // all of the inline children that precede the first block child // (and may be empty). The second list contains all of the block // children and any inlines that are between them (and must not be // empty, otherwise - why are we here?). The final list contains all // of the inline children that follow the final block child. // Find the first block child which defines list1 and list2 if (prevToFirstBlock) { prevToFirstBlock->SetNextSibling(nsnull); } else { list1 = nsnull; } // Find the last block child which defines the end of list2 and the // start of list3 nsIFrame* afterFirstBlock = list2->GetNextSibling(); nsIFrame* list3 = nsnull; nsIFrame* lastBlock = FindLastBlock(afterFirstBlock); if (!lastBlock) { lastBlock = list2; } list3 = lastBlock->GetNextSibling(); lastBlock->SetNextSibling(nsnull); // list1's frames belong to this inline frame so go ahead and take them newFrame->SetInitialChildList(nsnull, list1); // list2's frames belong to an anonymous block that we create right // now. The anonymous block will be the parent of the block children // of the inline. nsIAtom* blockStyle; nsRefPtr blockSC; nsIFrame* blockFrame; if (positioned) { blockStyle = nsCSSAnonBoxes::mozAnonymousPositionedBlock; blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(content, blockStyle, styleContext); } else { blockStyle = nsCSSAnonBoxes::mozAnonymousBlock; blockSC = mPresShell->StyleSet()-> ResolvePseudoStyleFor(content, blockStyle, styleContext); } blockFrame = NS_NewBlockFrame(mPresShell, blockSC); InitAndRestoreFrame(aState, content, aParentFrame, nsnull, blockFrame, PR_FALSE); // Any inline frame could have a view (e.g., opacity) nsHTMLContainerFrame::CreateViewForFrame(blockFrame, PR_FALSE); if (blockFrame->HasView() || newFrame->HasView()) { // Move list2's frames into the new view nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, list2, list2->GetParent(), blockFrame); } blockFrame->SetInitialChildList(nsnull, list2); nsFrameConstructorState state(mPresShell, mFixedContainingBlock, GetAbsoluteContainingBlock(blockFrame), GetFloatContainingBlock(blockFrame)); // If we have an inline between two blocks all inside an inline and the inner // inline contains a float, the float will end up in the float list of the // parent block of the inline, but its parent pointer will be the anonymous // block we create... AdjustFloatParentPtrs() deals with this by moving the // float from the outer state |aState| to the inner |state|. MoveChildrenTo(state.mFrameManager, blockFrame, list2, nsnull, &state, &aState); // list3's frames belong to another inline frame nsIFrame* inlineFrame; if (positioned) { inlineFrame = NS_NewPositionedInlineFrame(mPresShell, styleContext); } else { inlineFrame = NS_NewInlineFrame(mPresShell, styleContext); } InitAndRestoreFrame(aState, content, aParentFrame, nsnull, inlineFrame, PR_FALSE); // Any frame might need a view nsHTMLContainerFrame::CreateViewForFrame(inlineFrame, PR_FALSE); if (list3) { MoveFramesToEndOfIBSplit(aState, inlineFrame, list3, blockFrame, nsnull); } // Mark the frames as special. That way if any of the append/insert/remove // methods try to fiddle with the children, the containing block will be // reframed instead. SetFrameIsSpecial(newFrame, blockFrame); SetFrameIsSpecial(blockFrame, inlineFrame); SetFrameIsSpecial(inlineFrame, nsnull); MarkIBSpecialPrevSibling(blockFrame, newFrame); MarkIBSpecialPrevSibling(inlineFrame, blockFrame); #ifdef DEBUG if (gNoisyInlineConstruction) { nsIFrameDebug* frameDebug; printf("nsCSSFrameConstructor::ConstructInline:\n"); if ( (frameDebug = do_QueryFrame(*aNewFrame)) ) { printf(" ==> leading inline frame:\n"); frameDebug->List(stdout, 2); } if ( (frameDebug = do_QueryFrame(blockFrame)) ) { printf(" ==> block frame:\n"); frameDebug->List(stdout, 2); } if ( (frameDebug = do_QueryFrame(inlineFrame)) ) { printf(" ==> trailing inline frame:\n"); frameDebug->List(stdout, 2); } } #endif if (NS_SUCCEEDED(rv)) { aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); *aNewFrame = newFrame; } return rv; } void nsCSSFrameConstructor::MoveFramesToEndOfIBSplit(nsFrameConstructorState& aState, nsIFrame* aExistingEndFrame, nsIFrame* aFramesToMove, nsIFrame* aBlockPart, nsFrameConstructorState* aTargetState) { NS_PRECONDITION(aBlockPart, "Must have a block part"); NS_PRECONDITION(aExistingEndFrame, "Must have trailing inline"); NS_PRECONDITION(aFramesToMove, "Must have frames to move"); if (aExistingEndFrame->HasView() || aFramesToMove->GetParent()->HasView()) { // Move list3's frames into the new view nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, aFramesToMove, aFramesToMove->GetParent(), aExistingEndFrame); } // Reparent (cheaply) the frames in list3 nsIFrame* existingFirstChild = aExistingEndFrame->GetFirstChild(nsnull); if (!existingFirstChild && (aExistingEndFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { aExistingEndFrame->SetInitialChildList(nsnull, aFramesToMove); } else { aExistingEndFrame->InsertFrames(nsnull, nsnull, aFramesToMove); } nsFrameConstructorState* startState = aTargetState ? &aState : nsnull; MoveChildrenTo(aState.mFrameManager, aExistingEndFrame, aFramesToMove, existingFirstChild, aTargetState, startState); } void nsCSSFrameConstructor::BuildInlineChildItems(nsFrameConstructorState& aState, FrameConstructionItem& aParentItem) { // XXXbz should we preallocate aParentItem.mChildItems to some sane // length? Maybe even to parentContent->GetChildCount()? // Probe for generated content before nsStyleContext* const parentStyleContext = aParentItem.mStyleContext; nsIContent* const parentContent = aParentItem.mContent; CreateGeneratedContentItem(aState, nsnull, parentContent, parentStyleContext, nsCSSPseudoElements::before, aParentItem.mChildItems); ChildIterator iter, last; for (ChildIterator::Init(parentContent, &iter, &last); iter != last; ++iter) { // Manually check for comments/PIs, since we do't have a frame to pass to // AddFrameConstructionItems. We know our parent is a non-replaced inline, // so there is no need to do the NeedFrameFor check. nsIContent* content = *iter; if (content->IsNodeOfType(nsINode::eCOMMENT) || content->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) { continue; } nsRefPtr childContext = ResolveStyleContext(parentStyleContext, content); AddFrameConstructionItemsInternal(aState, content, nsnull, content->Tag(), content->GetNameSpaceID(), childContext, ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK, aParentItem.mChildItems); } // Probe for generated content after CreateGeneratedContentItem(aState, nsnull, parentContent, parentStyleContext, nsCSSPseudoElements::after, aParentItem.mChildItems); aParentItem.mIsAllInline = aParentItem.mChildItems.AreAllItemsInline(); } PRBool nsCSSFrameConstructor::WipeContainingBlock(nsFrameConstructorState& aState, nsIFrame* aContainingBlock, nsIFrame* aFrame, const FrameConstructionItemList& aItems, PRBool aIsAppend, nsIFrame* aPrevSibling) { if (aItems.IsEmpty()) { return PR_FALSE; } // Before we go and append the frames, we must check for two // special situations. // Situation #1 is a XUL frame that contains frames that are required // to be wrapped in blocks. if (aFrame->IsBoxFrame() && !(aFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && aItems.AnyItemsNeedBlockParent()) { RecreateFramesForContent(aFrame->GetContent()); return PR_TRUE; } // Situation #2 is an inline frame that will now contain block // frames. This is a no-no and the frame construction logic knows // how to fix this. See defition of IsInlineFrame() for what "an // inline" is. Whether we have "a block" is tested for by // AreAllItemsInline. // We also need to check for an append of content ending in an // inline to the block in an {ib} split or an insert of content // starting with an inline to the start of that block. If that // happens, we also need to reframe, since that content needs to go // into the following or preceding inline in the split. if (IsInlineFrame(aFrame)) { // Nothing to do if all kids are inline if (aItems.AreAllItemsInline()) { return PR_FALSE; } } else if (!IsFrameSpecial(aFrame)) { return PR_FALSE; } else { // aFrame is the block in an {ib} split. Check that we're not // messing up either end of it. if (aIsAppend) { // Will be handled in AppendFrames(), except the case when we might have // floats that we won't be able to move out because there is no float // containing block to move them into. // Walk up until we get a float containing block that's not part of an // {ib} split, since otherwise we might have to ship floats out of it // too. // XXXbz we could keep track of whether we have any descendants with // float style in the FrameConstructionItem if we really want, but it's // not clear to me that we need to. In any case, the right solution here // is to construct with the right parents to start with. nsIFrame* floatContainer = aFrame; do { floatContainer = GetFloatContainingBlock( GetIBSplitSpecialPrevSiblingForAnonymousBlock(floatContainer)); if (!floatContainer) { break; } if (!IsFrameSpecial(floatContainer)) { return PR_FALSE; } } while (1); } if (aPrevSibling && !aPrevSibling->GetNextSibling()) { // This is an append that won't go through AppendFrames. We can bail out // if the last frame we're appending is not inline. if (!aItems.IsStartInline()) { return PR_FALSE; } } else { // We can bail out if we're not inserting at the beginning or if // the first frame we're inserting is not inline. if (aPrevSibling || !aItems.IsEndInline()) { return PR_FALSE; } } } // If we don't have a containing block, start with aFrame and look for one. if (!aContainingBlock) { aContainingBlock = aFrame; } // To find the right block to reframe, just walk up the tree until we find a // frame that is: // 1) Not part of an IB split (not special) // 2) Not a pseudo-frame // 3) Not an inline frame // We're guaranteed to find one, since nsStyleContext::ApplyStyleFixups // enforces that the root is display:none, display:table, or display:block. // Note that walking up "too far" is OK in terms of correctness, even if it // might be a little inefficient. This is why we walk out of all // pseudo-frames -- telling which ones are or are not OK to walk out of is // too hard (and I suspect that we do in fact need to walk out of all of // them). while (IsFrameSpecial(aContainingBlock) || IsInlineOutside(aContainingBlock) || aContainingBlock->GetStyleContext()->GetPseudoType()) { aContainingBlock = aContainingBlock->GetParent(); NS_ASSERTION(aContainingBlock, "Must have non-inline, non-special, non-pseudo frame as root " "(or child of root, for a table root)!"); } // Tell parent of the containing block to reformulate the // entire block. This is painful and definitely not optimal // but it will *always* get the right answer. nsIContent *blockContent = aContainingBlock->GetContent(); nsCOMPtr parentContainer = blockContent->GetParent(); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::WipeContainingBlock: blockContent=%p parentContainer=%p\n", static_cast(blockContent), static_cast(parentContainer)); } #endif if (parentContainer) { ReinsertContent(parentContainer, blockContent); } else if (blockContent->GetCurrentDoc() == mDocument) { ReconstructDocElementHierarchyInternal(); } return PR_TRUE; } nsresult nsCSSFrameConstructor::ReframeContainingBlock(nsIFrame* aFrame) { #ifdef DEBUG // ReframeContainingBlock is a NASTY routine, it causes terrible performance problems // so I want to see when it is happening! Unfortunately, it is happening way to often because // so much content on the web causes 'special' block-in-inline frame situations and we handle them // very poorly if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ReframeContainingBlock frame=%p\n", static_cast(aFrame)); } #endif PRBool isReflowing; mPresShell->IsReflowLocked(&isReflowing); if(isReflowing) { // don't ReframeContainingBlock, this will result in a crash // if we remove a tree that's in reflow - see bug 121368 for testcase NS_ASSERTION(0, "Atemptted to nsCSSFrameConstructor::ReframeContainingBlock during a Reflow!!!"); return NS_OK; } // Get the first "normal" ancestor of the target frame. nsIFrame* containingBlock = GetIBContainingBlockFor(aFrame); if (containingBlock) { // From here we look for the containing block in case the target // frame is already a block (which can happen when an inline frame // wraps some of its content in an anonymous block; see // ConstructInline) // NOTE: We used to get the FloatContainingBlock here, but it was often wrong. // GetIBContainingBlock works much better and provides the correct container in all cases // so GetFloatContainingBlock(aFrame) has been removed // And get the containingBlock's content nsCOMPtr blockContent = containingBlock->GetContent(); if (blockContent) { // Now find the containingBlock's content's parent nsCOMPtr parentContainer = blockContent->GetParent(); if (parentContainer) { #ifdef DEBUG if (gNoisyContentUpdates) { printf(" ==> blockContent=%p, parentContainer=%p\n", static_cast(blockContent), static_cast(parentContainer)); } #endif return ReinsertContent(parentContainer, blockContent); } } } // If we get here, we're screwed! return ReconstructDocElementHierarchyInternal(); } nsresult nsCSSFrameConstructor::RemoveFixedItems(const nsFrameConstructorState& aState, nsIFrame *aRootElementFrame) { nsresult rv=NS_OK; if (mFixedContainingBlock) { nsIFrame *fixedChild = nsnull; do { fixedChild = mFixedContainingBlock->GetFirstChild(nsGkAtoms::fixedList); if (fixedChild && fixedChild == aRootElementFrame) { // Skip the root element frame, if it happens to be fixed-positioned // It will be explicitly removed later in // ReconstructDocElementHierarchyInternal fixedChild = fixedChild->GetNextSibling(); } if (fixedChild) { // Remove the placeholder so it doesn't end up sitting about pointing // to the removed fixed frame. nsPlaceholderFrame *placeholderFrame = aState.mFrameManager->GetPlaceholderFrameFor(fixedChild); NS_ASSERTION(placeholderFrame, "no placeholder for fixed-pos frame"); NS_ASSERTION(placeholderFrame->GetType() == nsGkAtoms::placeholderFrame, "Wrong type"); UnregisterPlaceholderChain(aState.mFrameManager, placeholderFrame); nsIFrame* placeholderParent = placeholderFrame->GetParent(); ::DeletingFrameSubtree(aState.mFrameManager, placeholderFrame); rv = aState.mFrameManager->RemoveFrame(placeholderParent, nsnull, placeholderFrame); if (NS_FAILED(rv)) { NS_WARNING("Error removing placeholder for fixed frame in RemoveFixedItems"); break; } ::DeletingFrameSubtree(aState.mFrameManager, fixedChild); rv = aState.mFrameManager->RemoveFrame(mFixedContainingBlock, nsGkAtoms::fixedList, fixedChild); if (NS_FAILED(rv)) { NS_WARNING("Error removing frame from fixed containing block in RemoveFixedItems"); break; } } } while(fixedChild); } else { NS_WARNING( "RemoveFixedItems called with no FixedContainingBlock data member set"); } return rv; } void nsCSSFrameConstructor::RestyleForAppend(nsIContent* aContainer, PRInt32 aNewIndexInContainer) { NS_ASSERTION(aContainer, "must have container for append"); #ifdef DEBUG { for (PRInt32 index = aNewIndexInContainer;; ++index) { nsIContent *content = aContainer->GetChildAt(index); if (!content) { NS_ASSERTION(index != aNewIndexInContainer, "yikes, nothing appended"); break; } NS_ASSERTION(!content->IsRootOfAnonymousSubtree(), "anonymous nodes should not be in child lists"); } } #endif PRUint32 selectorFlags = aContainer->GetFlags() & (NODE_ALL_SELECTOR_FLAGS & ~NODE_HAS_SLOW_SELECTOR_NOAPPEND); if (selectorFlags == 0) return; if (selectorFlags & NODE_HAS_SLOW_SELECTOR) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) { // see whether we need to restyle the container PRBool wasEmpty = PR_TRUE; // :empty or :-moz-only-whitespace for (PRInt32 index = 0; index < aNewIndexInContainer; ++index) { // We don't know whether we're testing :empty or :-moz-only-whitespace, // so be conservative and assume :-moz-only-whitespace (i.e., make // IsSignificantChild less likely to be true, and thus make us more // likely to restyle). if (nsStyleUtil::IsSignificantChild(aContainer->GetChildAt(index), PR_TRUE, PR_FALSE)) { wasEmpty = PR_FALSE; break; } } if (wasEmpty) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } } if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) { // restyle the last element child before this node for (PRInt32 index = aNewIndexInContainer - 1; index >= 0; --index) { nsIContent *content = aContainer->GetChildAt(index); if (content->IsNodeOfType(nsINode::eELEMENT)) { PostRestyleEvent(content, eReStyle_Self, NS_STYLE_HINT_NONE); break; } } } } // Restyling for a ContentInserted or CharacterDataChanged notification. // This could be used for ContentRemoved as well if we got the // notification before the removal happened (and sometimes // CharacterDataChanged is more like a removal than an addition). // The comments are written and variables are named in terms of it being // a ContentInserted notification. void nsCSSFrameConstructor::RestyleForInsertOrChange(nsIContent* aContainer, nsIContent* aChild) { NS_ASSERTION(!aChild->IsRootOfAnonymousSubtree(), "anonymous nodes should not be in child lists"); PRUint32 selectorFlags = aContainer ? (aContainer->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0; if (selectorFlags == 0) return; if (selectorFlags & (NODE_HAS_SLOW_SELECTOR | NODE_HAS_SLOW_SELECTOR_NOAPPEND)) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) { // see whether we need to restyle the container PRBool wasEmpty = PR_TRUE; // :empty or :-moz-only-whitespace for (PRInt32 index = 0; ; ++index) { nsIContent *child = aContainer->GetChildAt(index); if (!child) // last child break; if (child == aChild) continue; // We don't know whether we're testing :empty or :-moz-only-whitespace, // so be conservative and assume :-moz-only-whitespace (i.e., make // IsSignificantChild less likely to be true, and thus make us more // likely to restyle). if (nsStyleUtil::IsSignificantChild(child, PR_TRUE, PR_FALSE)) { wasEmpty = PR_FALSE; break; } } if (wasEmpty) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } } if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) { // restyle the previously-first element child if it is after this node PRBool passedChild = PR_FALSE; for (PRInt32 index = 0; ; ++index) { nsIContent *content = aContainer->GetChildAt(index); if (!content) break; // went through all children if (content == aChild) { passedChild = PR_TRUE; continue; } if (content->IsNodeOfType(nsINode::eELEMENT)) { if (passedChild) { PostRestyleEvent(content, eReStyle_Self, NS_STYLE_HINT_NONE); } break; } } // restyle the previously-last element child if it is before this node passedChild = PR_FALSE; for (PRInt32 index = aContainer->GetChildCount() - 1; index >= 0; --index) { nsIContent *content = aContainer->GetChildAt(index); if (content == aChild) { passedChild = PR_TRUE; continue; } if (content->IsNodeOfType(nsINode::eELEMENT)) { if (passedChild) { PostRestyleEvent(content, eReStyle_Self, NS_STYLE_HINT_NONE); } break; } } } } void nsCSSFrameConstructor::RestyleForRemove(nsIContent* aContainer, nsIContent* aOldChild, PRInt32 aIndexInContainer) { NS_ASSERTION(!aOldChild->IsRootOfAnonymousSubtree(), "anonymous nodes should not be in child lists"); PRUint32 selectorFlags = aContainer ? (aContainer->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0; if (selectorFlags == 0) return; if (selectorFlags & (NODE_HAS_SLOW_SELECTOR | NODE_HAS_SLOW_SELECTOR_NOAPPEND)) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) { // see whether we need to restyle the container PRBool isEmpty = PR_TRUE; // :empty or :-moz-only-whitespace for (PRInt32 index = 0; ; ++index) { nsIContent *child = aContainer->GetChildAt(index); if (!child) // last child break; // We don't know whether we're testing :empty or :-moz-only-whitespace, // so be conservative and assume :-moz-only-whitespace (i.e., make // IsSignificantChild less likely to be true, and thus make us more // likely to restyle). if (nsStyleUtil::IsSignificantChild(child, PR_TRUE, PR_FALSE)) { isEmpty = PR_FALSE; break; } } if (isEmpty) { PostRestyleEvent(aContainer, eReStyle_Self, NS_STYLE_HINT_NONE); // Restyling the container is the most we can do here, so we're done. return; } } if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) { // restyle the previously-first element child if it is after aOldChild for (PRInt32 index = 0; ; ++index) { nsIContent *content = aContainer->GetChildAt(index); if (!content) break; // went through all children if (content->IsNodeOfType(nsINode::eELEMENT)) { if (index >= aIndexInContainer) { PostRestyleEvent(content, eReStyle_Self, NS_STYLE_HINT_NONE); } break; } } // restyle the previously-last element child if it is before aOldChild for (PRInt32 index = aContainer->GetChildCount() - 1; index >= 0; --index) { nsIContent *content = aContainer->GetChildAt(index); if (content->IsNodeOfType(nsINode::eELEMENT)) { if (index < aIndexInContainer) { PostRestyleEvent(content, eReStyle_Self, NS_STYLE_HINT_NONE); } break; } } } } static PLDHashOperator CollectRestyles(nsISupports* aContent, nsCSSFrameConstructor::RestyleData& aData, void* aRestyleArrayPtr) { nsCSSFrameConstructor::RestyleEnumerateData** restyleArrayPtr = static_cast (aRestyleArrayPtr); nsCSSFrameConstructor::RestyleEnumerateData* currentRestyle = *restyleArrayPtr; currentRestyle->mContent = static_cast(aContent); currentRestyle->mRestyleHint = aData.mRestyleHint; currentRestyle->mChangeHint = aData.mChangeHint; // Increment to the next slot in the array *restyleArrayPtr = currentRestyle + 1; return PL_DHASH_NEXT; } void nsCSSFrameConstructor::ProcessOneRestyle(nsIContent* aContent, nsReStyleHint aRestyleHint, nsChangeHint aChangeHint) { NS_PRECONDITION(aContent, "Must have content node"); if (!aContent->IsInDoc() || aContent->GetCurrentDoc() != mDocument) { // Content node has been removed from our document; nothing else // to do here return; } nsIFrame* primaryFrame = mPresShell->GetPrimaryFrameFor(aContent); if (aRestyleHint & eReStyle_Self) { RestyleElement(aContent, primaryFrame, aChangeHint); } else if (aChangeHint && (primaryFrame || (aChangeHint & nsChangeHint_ReconstructFrame))) { // Don't need to recompute style; just apply the hint nsStyleChangeList changeList; changeList.AppendChange(primaryFrame, aContent, aChangeHint); ProcessRestyledFrames(changeList); } if (aRestyleHint & eReStyle_LaterSiblings) { RestyleLaterSiblings(aContent); } } #define RESTYLE_ARRAY_STACKSIZE 128 void nsCSSFrameConstructor::RebuildAllStyleData(nsChangeHint aExtraHint) { NS_ASSERTION(!(aExtraHint & nsChangeHint_ReconstructFrame), "Should not reconstruct the root of the frame tree. " "Use ReconstructDocElementHierarchy instead."); mRebuildAllStyleData = PR_FALSE; NS_UpdateHint(aExtraHint, mRebuildAllExtraHint); mRebuildAllExtraHint = nsChangeHint(0); if (!mPresShell || !mPresShell->GetRootFrame() || !mPresShell->GetPresContext()->IsDynamic()) return; nsAutoScriptBlocker scriptBlocker; // Make sure that the viewmanager will outlive the presshell nsIViewManager::UpdateViewBatch batch(mPresShell->GetViewManager()); // Processing the style changes could cause a flush that propagates to // the parent frame and thus destroys the pres shell. nsCOMPtr kungFuDeathGrip(mPresShell); // Tell the style set to get the old rule tree out of the way // so we can recalculate while maintaining rule tree immutability nsresult rv = mPresShell->StyleSet()->BeginReconstruct(); if (NS_FAILED(rv)) { batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); return; } // Recalculate all of the style contexts for the document // Note that we can ignore the return value of ComputeStyleChangeFor // because we never need to reframe the root frame // XXX This could be made faster by not rerunning rule matching // (but note that nsPresShell::SetPreferenceStyleRules currently depends // on us re-running rule matching here nsStyleChangeList changeList; // XXX Does it matter that we're passing aExtraHint to the real root // frame and not the root node's primary frame? mPresShell->FrameManager()->ComputeStyleChangeFor(mPresShell->GetRootFrame(), &changeList, aExtraHint); // Process the required changes ProcessRestyledFrames(changeList); // Tell the style set it's safe to destroy the old rule tree. We // must do this after the ProcessRestyledFrames call in case the // change list has frame reconstructs in it (since frames to be // reconstructed will still have their old style context pointers // until they are destroyed). mPresShell->StyleSet()->EndReconstruct(); batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC); } void nsCSSFrameConstructor::ProcessPendingRestyles() { NS_PRECONDITION(mDocument, "No document? Pshaw!\n"); NS_PRECONDITION(!nsContentUtils::IsSafeToRunScript(), "Missing a script blocker!"); PRUint32 count = mPendingRestyles.Count(); if (count) { // Use the stack if we can, otherwise fall back on heap-allocation. nsAutoTArray restyleArr; RestyleEnumerateData* restylesToProcess = restyleArr.AppendElements(count); if (!restylesToProcess) { return; } RestyleEnumerateData* lastRestyle = restylesToProcess; mPendingRestyles.Enumerate(CollectRestyles, &lastRestyle); NS_ASSERTION(lastRestyle - restylesToProcess == PRInt32(count), "Enumeration screwed up somehow"); // Clear the hashtable so we don't end up trying to process a restyle we're // already processing, sending us into an infinite loop. mPendingRestyles.Clear(); // Make sure to not rebuild quote or counter lists while we're // processing restyles BeginUpdate(); for (RestyleEnumerateData* currentRestyle = restylesToProcess; currentRestyle != lastRestyle; ++currentRestyle) { ProcessOneRestyle(currentRestyle->mContent, currentRestyle->mRestyleHint, currentRestyle->mChangeHint); } EndUpdate(); #ifdef DEBUG mPresShell->VerifyStyleTree(); #endif } if (mRebuildAllStyleData) { // We probably wasted a lot of work up above, but this seems safest // and it should be rarely used. RebuildAllStyleData(nsChangeHint(0)); } } void nsCSSFrameConstructor::PostRestyleEvent(nsIContent* aContent, nsReStyleHint aRestyleHint, nsChangeHint aMinChangeHint) { if (NS_UNLIKELY(mIsDestroyingFrameTree)) { NS_NOTREACHED("PostRestyleEvent after the shell is destroyed (bug 279505)"); return; } if (aRestyleHint == 0 && !aMinChangeHint) { // Nothing to do here return; } NS_ASSERTION(aContent->IsNodeOfType(nsINode::eELEMENT), "Shouldn't be trying to restyle non-elements directly"); RestyleData existingData; existingData.mRestyleHint = nsReStyleHint(0); existingData.mChangeHint = NS_STYLE_HINT_NONE; mPendingRestyles.Get(aContent, &existingData); existingData.mRestyleHint = nsReStyleHint(existingData.mRestyleHint | aRestyleHint); NS_UpdateHint(existingData.mChangeHint, aMinChangeHint); mPendingRestyles.Put(aContent, existingData); PostRestyleEventInternal(); } void nsCSSFrameConstructor::PostRestyleEventInternal() { if (!mRestyleEvent.IsPending()) { nsRefPtr ev = new RestyleEvent(this); if (NS_FAILED(NS_DispatchToCurrentThread(ev))) { NS_WARNING("failed to dispatch restyle event"); // XXXbz and what? } else { mRestyleEvent = ev; } } } void nsCSSFrameConstructor::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint) { NS_ASSERTION(!(aExtraHint & nsChangeHint_ReconstructFrame), "Should not reconstruct the root of the frame tree. " "Use ReconstructDocElementHierarchy instead."); mRebuildAllStyleData = PR_TRUE; NS_UpdateHint(mRebuildAllExtraHint, aExtraHint); // Get a restyle event posted if necessary PostRestyleEventInternal(); } NS_IMETHODIMP nsCSSFrameConstructor::RestyleEvent::Run() { if (!mConstructor) return NS_OK; // event was revoked // Make sure that any restyles that happen from now on will go into // a new event. mConstructor->mRestyleEvent.Forget(); return mConstructor->mPresShell->FlushPendingNotifications(Flush_Style); } NS_IMETHODIMP nsCSSFrameConstructor::LazyGenerateChildrenEvent::Run() { mPresShell->GetDocument()->FlushPendingNotifications(Flush_Layout); // this is hard-coded to handle only menu popup frames nsIFrame* frame = mPresShell->GetPrimaryFrameFor(mContent); if (frame && frame->GetType() == nsGkAtoms::menuPopupFrame) { #ifdef MOZ_XUL // it is possible that the frame is different than the one that requested // the lazy generation, but as long as it's a popup frame that hasn't // generated its children yet, that's OK. nsMenuPopupFrame* menuPopupFrame = static_cast(frame); if (menuPopupFrame->HasGeneratedChildren()) { if (mCallback) mCallback(mContent, frame, mArg); return NS_OK; } // indicate that the children have been generated menuPopupFrame->SetGeneratedChildren(); #endif { nsAutoScriptBlocker scriptBlocker; nsCSSFrameConstructor* fc = mPresShell->FrameConstructor(); fc->BeginUpdate(); nsFrameItems childItems; nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull); nsresult rv = fc->ProcessChildren(state, mContent, frame->GetStyleContext(), frame, PR_FALSE, childItems, PR_FALSE); if (NS_FAILED(rv)) { fc->EndUpdate(); return rv; } frame->SetInitialChildList(nsnull, childItems.childList); fc->EndUpdate(); } if (mCallback) mCallback(mContent, frame, mArg); // call XBL constructors after the frames are created mPresShell->GetDocument()->BindingManager()->ProcessAttachedQueue(); } return NS_OK; } ////////////////////////////////////////////////////////////// // nsCSSFrameConstructor::FrameConstructionItemList methods // ////////////////////////////////////////////////////////////// void nsCSSFrameConstructor::FrameConstructionItemList:: AdjustCountsForItem(FrameConstructionItem* aItem, PRInt32 aDelta) { NS_PRECONDITION(aDelta == 1 || aDelta == -1, "Unexpected delta"); mItemCount += aDelta; if (aItem->mIsAllInline) { mInlineCount += aDelta; } if (aItem->mFCData->mBits & FCDATA_IS_LINE_PARTICIPANT) { mLineParticipantCount += aDelta; } mDesiredParentCounts[aItem->DesiredParentType()] += aDelta; } //////////////////////////////////////////////////////////////////////// // nsCSSFrameConstructor::FrameConstructionItemList::Iterator methods // //////////////////////////////////////////////////////////////////////// void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::AppendItemToList(FrameConstructionItemList& aTargetList) { NS_ASSERTION(&aTargetList != &mList, "Unexpected call"); NS_PRECONDITION(!IsDone(), "should not be done"); FrameConstructionItem* item = ToItem(mCurrent); Next(); PR_REMOVE_LINK(item); PR_APPEND_LINK(item, &aTargetList.mItems); mList.AdjustCountsForItem(item, -1); aTargetList.AdjustCountsForItem(item, 1); } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::AppendItemsToList(const Iterator& aEnd, FrameConstructionItemList& aTargetList) { NS_ASSERTION(&aTargetList != &mList, "Unexpected call"); NS_PRECONDITION(mEnd == aEnd.mEnd, "end iterator for some other list?"); if (!AtStart() || !aEnd.IsDone() || !aTargetList.IsEmpty()) { do { AppendItemToList(aTargetList); } while (*this != aEnd); return; } // move over the list of items PR_INSERT_AFTER(&aTargetList.mItems, &mList.mItems); PR_REMOVE_LINK(&mList.mItems); // Copy over the various counters aTargetList.mInlineCount = mList.mInlineCount; aTargetList.mLineParticipantCount = mList.mLineParticipantCount; aTargetList.mItemCount = mList.mItemCount; memcpy(aTargetList.mDesiredParentCounts, mList.mDesiredParentCounts, sizeof(aTargetList.mDesiredParentCounts)); // reset mList new (&mList) FrameConstructionItemList(); // Point ourselves to aEnd, as advertised mCurrent = mEnd = &mList.mItems; NS_POSTCONDITION(*this == aEnd, "How did that happen?"); } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::InsertItem(FrameConstructionItem* aItem) { // Just insert the item before us. There's no magic here. PR_INSERT_BEFORE(aItem, mCurrent); mList.AdjustCountsForItem(aItem, 1); NS_POSTCONDITION(PR_NEXT_LINK(aItem) == mCurrent, "How did that happen?"); } void nsCSSFrameConstructor::FrameConstructionItemList::Iterator::DeleteItem() { FrameConstructionItem* item = ToItem(mCurrent); Next(); PR_REMOVE_LINK(item); mList.AdjustCountsForItem(item, -1); delete item; }