/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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): * * 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 ***** */ /* base class #2 for rendering objects that have child lists */ #ifndef nsHTMLContainerFrame_h___ #define nsHTMLContainerFrame_h___ #include "nsContainerFrame.h" #include "gfxPoint.h" class nsString; class nsAbsoluteFrame; class nsPlaceholderFrame; struct nsStyleDisplay; struct nsStylePosition; struct nsHTMLReflowMetrics; struct nsHTMLReflowState; class nsLineBox; // Some macros for container classes to do sanity checking on // width/height/x/y values computed during reflow. #ifdef DEBUG #define CRAZY_W 500000 // 100000 lines, approximately. Assumes p2t is 15 and 15 pixels per line #define CRAZY_H 22500000 #define CRAZY_WIDTH(_x) (((_x) < -CRAZY_W) || ((_x) > CRAZY_W)) #define CRAZY_HEIGHT(_y) (((_y) < -CRAZY_H) || ((_y) > CRAZY_H)) #endif class nsDisplayTextDecoration; // Base class for html container frames that provides common // functionality. class nsHTMLContainerFrame : public nsContainerFrame { public: /** * Helper method to create next-in-flows if necessary. If aFrame * already has a next-in-flow then this method does * nothing. Otherwise, a new continuation frame is created and * linked into the flow. In addition, the new frame becomes the * next-sibling of aFrame. If aPlaceholderResult is not null and * aFrame is a float or positioned, then *aPlaceholderResult holds * a placeholder. */ static nsresult CreateNextInFlow(nsPresContext* aPresContext, nsIFrame* aOuterFrame, nsIFrame* aFrame, nsIFrame*& aNextInFlowResult); /** * Helper method to wrap views around frames. Used by containers * under special circumstances (can be used by leaf frames as well) */ static nsresult CreateViewForFrame(nsIFrame* aFrame, PRBool aForce); static nsresult ReparentFrameView(nsPresContext* aPresContext, nsIFrame* aChildFrame, nsIFrame* aOldParentFrame, nsIFrame* aNewParentFrame); static nsresult ReparentFrameViewList(nsPresContext* aPresContext, nsIFrame* aChildFrameList, nsIFrame* aOldParentFrame, nsIFrame* aNewParentFrame); /** * Displays the standard border, background and outline for the frame * and calls DisplayTextDecorationsAndChildren. This is suitable for * inline frames or frames that behave like inlines. */ NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists); nsresult DisplayTextDecorations(nsDisplayListBuilder* aBuilder, nsDisplayList* aBelowTextDecorations, nsDisplayList* aAboveTextDecorations, nsLineBox* aLine); protected: nsHTMLContainerFrame(nsStyleContext *aContext) : nsContainerFrame(aContext) {} /** * Displays the below-children decorations, then the children, then * the above-children decorations, with the decorations going in the * Content() list. This is suitable for inline elements and elements * that behave like inline elements (e.g. MathML containers). */ nsresult DisplayTextDecorationsAndChildren(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists); /** * Fetch the text decorations for this frame. * @param aIsBlock whether |this| is a block frame or no. * @param aDecorations mask with all decorations. * See bug 1777 and 20163 to understand how a * frame can end up with several decorations. * @param aUnderColor The color of underline if the appropriate bit * in aDecoration is set. It is undefined otherwise. * @param aOverColor The color of overline if the appropriate bit * in aDecoration is set. It is undefined otherwise. * @param aStrikeColor The color of strike-through if the appropriate bit * in aDecoration is set. It is undefined otherwise. * NOTE: This function assigns NS_STYLE_TEXT_DECORATION_NONE to * aDecorations for text-less frames. See bug 20163 for * details. */ void GetTextDecorations(nsPresContext* aPresContext, PRBool aIsBlock, PRUint8& aDecorations, nscolor& aUnderColor, nscolor& aOverColor, nscolor& aStrikeColor); /** * Function that does the actual drawing of the textdecoration. * input: * @param aCtx the Thebes graphics context to draw on * @param aLine the line, or nsnull if this is an inline frame * @param aColor the color of the text-decoration * @param aAscent ascent of the font from which the * text-decoration was derived. * @param aOffset distance *above* baseline where the * text-decoration should be drawn, * i.e. negative offsets draws *below* * the baseline. * @param aSize the thickness of the line * @param aDecoration which line will be painted * i.e., NS_STYLE_TEXT_DECORATION_UNDERLINE or * NS_STYLE_TEXT_DECORATION_OVERLINE or * NS_STYLE_TEXT_DECORATION_LINE_THROUGH. */ virtual void PaintTextDecorationLine(gfxContext* aCtx, const nsPoint& aPt, nsLineBox* aLine, nscolor aColor, gfxFloat aOffset, gfxFloat aAscent, gfxFloat aSize, const PRUint8 aDecoration); friend class nsDisplayTextDecoration; friend class nsDisplayTextShadow; }; #endif /* nsHTMLContainerFrame_h___ */