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534 lines
21 KiB
C++
534 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsBlockFrame_h___
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#define nsBlockFrame_h___
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#include "nsHTMLContainerFrame.h"
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#include "nsHTMLParts.h"
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#include "nsAbsoluteContainingBlock.h"
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#include "nsLineBox.h"
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class nsBlockReflowState;
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class nsBulletFrame;
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class nsLineBox;
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class nsFirstLineFrame;
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class nsILineIterator;
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class nsIntervalSet;
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/**
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* Child list name indices
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* @see #GetAdditionalChildListName()
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*/
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#define NS_BLOCK_FRAME_FLOATER_LIST_INDEX 0
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#define NS_BLOCK_FRAME_BULLET_LIST_INDEX 1
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#define NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX 2
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#define NS_BLOCK_FRAME_LAST_LIST_INDEX NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX
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#define nsBlockFrameSuper nsHTMLContainerFrame
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#define NS_BLOCK_FRAME_CID \
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{ 0xa6cf90df, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
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extern const nsIID kBlockFrameCID;
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/*
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* Base class for block and inline frames.
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* The block frame has an additional named child list:
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* - "Absolute-list" which contains the absolutely positioned frames
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*
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* @see nsLayoutAtoms::absoluteList
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*/
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class nsBlockFrame : public nsBlockFrameSuper
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{
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public:
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typedef nsLineList::iterator line_iterator;
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typedef nsLineList::const_iterator const_line_iterator;
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typedef nsLineList::reverse_iterator reverse_line_iterator;
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typedef nsLineList::const_reverse_iterator const_reverse_line_iterator;
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line_iterator begin_lines() { return mLines.begin(); }
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line_iterator end_lines() { return mLines.end(); }
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const_line_iterator begin_lines() const { return mLines.begin(); }
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const_line_iterator end_lines() const { return mLines.end(); }
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reverse_line_iterator rbegin_lines() { return mLines.rbegin(); }
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reverse_line_iterator rend_lines() { return mLines.rend(); }
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const_reverse_line_iterator rbegin_lines() const { return mLines.rbegin(); }
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const_reverse_line_iterator rend_lines() const { return mLines.rend(); }
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friend nsresult NS_NewBlockFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags);
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// nsISupports
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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// nsIFrame
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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NS_IMETHOD FirstChild(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame** aFirstChild) const;
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NS_IMETHOD GetAdditionalChildListName(PRInt32 aIndex,
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nsIAtom** aListName) const;
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NS_IMETHOD Destroy(nsIPresContext* aPresContext);
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NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const;
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NS_IMETHOD IsPercentageBase(PRBool& aBase) const;
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NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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#ifdef DEBUG
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NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
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NS_IMETHOD VerifyTree() const;
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#endif
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NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext, const nsPoint& aPoint, nsFramePaintLayer aWhichLayer, nsIFrame** aFrame);
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NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild);
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NS_IMETHOD IsVisibleForPainting(nsIPresContext * aPresContext,
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nsIRenderingContext& aRenderingContext,
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PRBool aCheckVis,
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PRBool* aIsVisible);
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NS_IMETHOD IsEmpty(PRBool aIsQuirkMode, PRBool aIsPre, PRBool* aResult);
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// nsIHTMLReflow
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType,
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PRInt32 aHint);
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#ifdef DO_SELECTION
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NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD HandleDrag(nsIPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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nsIFrame * FindHitFrame(nsBlockFrame * aBlockFrame,
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const nscoord aX, const nscoord aY,
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const nsPoint & aPoint);
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#endif
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virtual void DeleteChildsNextInFlow(nsIPresContext* aPresContext,
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nsIFrame* aNextInFlow);
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/** return the topmost block child based on y-index.
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* almost always the first or second line, if there is one.
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* accounts for lines that hold only compressed white space, etc.
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*/
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nsIFrame* GetTopBlockChild();
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// Returns the line containing aFrame, or end_lines() if the frame
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// isn't in the block.
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line_iterator FindLineFor(nsIFrame* aFrame);
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static nsresult GetCurrentLine(nsBlockReflowState *aState, nsLineBox **aOutCurrentLine);
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static void CombineRects(const nsRect& r1, nsRect& r2);
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inline nscoord GetAscent() { return mAscent; }
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protected:
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nsBlockFrame();
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virtual ~nsBlockFrame();
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nsIStyleContext* GetFirstLetterStyle(nsIPresContext* aPresContext);
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/**
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* GetClosestLine will return the line that VERTICALLY owns the point closest to aPoint.y
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* aOrigin is the offset for this block frame to its frame.
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* aPoint is the point to search for.
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* aClosestLine is the result.
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*/
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nsresult GetClosestLine(nsILineIterator *aLI,
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const nsPoint &aOrigin,
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const nsPoint &aPoint,
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PRInt32 &aClosestLine);
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void SetFlags(PRUint32 aFlags) {
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mState &= ~NS_BLOCK_FLAGS_MASK;
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mState |= aFlags;
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}
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PRBool HaveOutsideBullet() const {
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#ifdef DEBUG
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if(mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET) {
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NS_ASSERTION(mBullet,"NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET flag set and no mBullet");
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}
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#endif
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return 0 != (mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
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}
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/** move the frames contained by aLine by aDY
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* if aLine is a block, it's child floaters are added to the state manager
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*/
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void SlideLine(nsBlockReflowState& aState,
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nsLineBox* aLine, nscoord aDY);
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/** grab overflow lines from this block's prevInFlow, and make them
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* part of this block's mLines list.
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* @return PR_TRUE if any lines were drained.
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*/
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PRBool DrainOverflowLines(nsIPresContext* aPresContext);
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virtual PRIntn GetSkipSides() const;
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virtual void ComputeFinalSize(const nsHTMLReflowState& aReflowState,
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nsBlockReflowState& aState,
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nsHTMLReflowMetrics& aMetrics);
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/** add the frames in aFrameList to this block after aPrevSibling
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* this block thinks in terms of lines, but the frame construction code
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* knows nothing about lines at all. So we need to find the line that
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* contains aPrevSibling and add aFrameList after aPrevSibling on that line.
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* new lines are created as necessary to handle block data in aFrameList.
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*/
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nsresult AddFrames(nsIPresContext* aPresContext,
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nsIFrame* aFrameList,
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nsIFrame* aPrevSibling);
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/** move the frame list rooted at aFrame into this as a child
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* assumes prev/next sibling pointers will be or have been set elsewhere
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* changes aFrame's parent to be this, and reparents aFrame's view and stylecontext.
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*/
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void FixParentAndView(nsIPresContext* aPresContext, nsIFrame* aFrame);
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/** does all the real work for removing aDeletedFrame from this
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* finds the line containing aFrame.
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* handled continued frames
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* marks lines dirty as needed
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*/
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nsresult DoRemoveFrame(nsIPresContext* aPresContext,
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nsIFrame* aDeletedFrame);
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/** set up the conditions necessary for an initial reflow */
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nsresult PrepareInitialReflow(nsBlockReflowState& aState);
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/** set up the conditions necessary for an styleChanged reflow */
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nsresult PrepareStyleChangedReflow(nsBlockReflowState& aState);
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/** set up the conditions necessary for an incremental reflow.
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* the primary task is to mark the minimumly sufficient lines dirty.
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*/
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nsresult PrepareChildIncrementalReflow(nsBlockReflowState& aState);
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/**
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* Retarget an inline incremental reflow from continuing frames that
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* will be destroyed.
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*
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* @param aState |aState.mNextRCFrame| contains the next frame in
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* the reflow path; this will be ``rewound'' to either the target
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* frame's primary frame, or to the first continuation frame after a
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* ``hard break''. In other words, it will be set to the closest
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* continuation which will not be destroyed by the unconstrained
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* reflow. The remaining frames in the reflow path for
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* |aState.mReflowState.reflowCommand| will be altered similarly.
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*
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* @param aLine is initially the line box that contains the target
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* frame. It will be ``rewound'' in lockstep with
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* |aState.mNextRCFrame|.
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*
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* @param aPrevInFlow points to the target frame's prev-in-flow.
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*/
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void RetargetInlineIncrementalReflow(nsBlockReflowState &aState,
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line_iterator &aLine,
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nsIFrame *aPrevInFlow);
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/** set up the conditions necessary for an resize reflow
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* the primary task is to mark the minimumly sufficient lines dirty.
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*/
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nsresult PrepareResizeReflow(nsBlockReflowState& aState);
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/** reflow all lines that have been marked dirty */
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nsresult ReflowDirtyLines(nsBlockReflowState& aState);
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//----------------------------------------
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// Methods for line reflow
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/**
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* Reflow a line.
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* @param aState the current reflow state
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* @param aLine the line to reflow. can contain a single block frame
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* or contain 1 or more inline frames.
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* @param aKeepReflowGoing [OUT] indicates whether the caller should continue to reflow more lines
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* @param aDamageDirtyArea if PR_TRUE, do extra work to mark the changed areas as damaged for painting
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* this indicates that frames may have changed size, for example
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*/
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nsresult ReflowLine(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool* aKeepReflowGoing,
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PRBool aDamageDirtyArea = PR_FALSE);
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nsresult PlaceLine(nsBlockReflowState& aState,
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nsLineLayout& aLineLayout,
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line_iterator aLine,
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PRBool* aKeepReflowGoing,
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PRBool aUpdateMaximumWidth);
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/**
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* Mark |aLine| dirty, and, if necessary because of possible
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* pull-up, mark the previous line dirty as well.
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*/
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nsresult MarkLineDirty(line_iterator aLine);
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// XXX blech
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void PostPlaceLine(nsBlockReflowState& aState,
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nsLineBox* aLine,
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const nsSize& aMaxElementSize);
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void ComputeLineMaxElementSize(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nsSize* aMaxElementSize);
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// XXX where to go
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PRBool ShouldJustifyLine(nsBlockReflowState& aState,
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line_iterator aLine);
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void DeleteLine(nsBlockReflowState& aState,
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nsLineList::iterator aLine,
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nsLineList::iterator aLineEnd);
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//----------------------------------------
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// Methods for individual frame reflow
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PRBool ShouldApplyTopMargin(nsBlockReflowState& aState,
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nsLineBox* aLine);
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nsresult ReflowBlockFrame(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool* aKeepGoing);
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nsresult ReflowInlineFrames(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool* aKeepLineGoing,
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PRBool aDamageDirtyArea,
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PRBool aUpdateMaximumWidth = PR_FALSE);
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nsresult DoReflowInlineFrames(nsBlockReflowState& aState,
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nsLineLayout& aLineLayout,
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line_iterator aLine,
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PRBool* aKeepReflowGoing,
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PRUint8* aLineReflowStatus,
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PRBool aUpdateMaximumWidth,
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PRBool aDamageDirtyArea);
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nsresult DoReflowInlineFramesAuto(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool* aKeepReflowGoing,
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PRUint8* aLineReflowStatus,
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PRBool aUpdateMaximumWidth,
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PRBool aDamageDirtyArea);
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nsresult DoReflowInlineFramesMalloc(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool* aKeepReflowGoing,
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PRUint8* aLineReflowStatus,
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PRBool aUpdateMaximumWidth,
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PRBool aDamageDirtyArea);
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nsresult ReflowInlineFrame(nsBlockReflowState& aState,
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nsLineLayout& aLineLayout,
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line_iterator aLine,
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nsIFrame* aFrame,
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PRUint8* aLineReflowStatus);
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nsresult ReflowFloater(nsBlockReflowState& aState,
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nsPlaceholderFrame* aPlaceholder,
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nsRect& aCombinedRectResult,
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nsMargin& aMarginResult,
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nsMargin& aComputedOffsetsResult);
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//----------------------------------------
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// Methods for pushing/pulling lines/frames
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virtual nsresult CreateContinuationFor(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nsIFrame* aFrame,
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PRBool& aMadeNewFrame);
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nsresult SplitLine(nsBlockReflowState& aState,
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nsLineLayout& aLineLayout,
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line_iterator aLine,
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nsIFrame* aFrame);
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nsresult PullFrame(nsBlockReflowState& aState,
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line_iterator aLine,
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PRBool aDamageDeletedLine,
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nsIFrame*& aFrameResult);
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nsresult PullFrameFrom(nsBlockReflowState& aState,
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nsLineBox* aToLine,
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nsLineList& aFromContainer,
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nsLineList::iterator aFromLine,
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PRBool aUpdateGeometricParent,
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PRBool aDamageDeletedLines,
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nsIFrame*& aFrameResult);
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void PushLines(nsBlockReflowState& aState,
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nsLineList::iterator aLineBefore);
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//----------------------------------------
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//XXX
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virtual void PaintChildren(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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void PaintFloaters(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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void PropagateFloaterDamage(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nscoord aDeltaY);
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void BuildFloaterList();
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//----------------------------------------
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// List handling kludge
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void RenumberLists(nsIPresContext* aPresContext);
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PRBool RenumberListsInBlock(nsIPresContext* aPresContext,
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nsBlockFrame* aContainerFrame,
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PRInt32* aOrdinal,
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PRInt32 aDepth);
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PRBool RenumberListsFor(nsIPresContext* aPresContext, nsIFrame* aKid, PRInt32* aOrdinal, PRInt32 aDepth);
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PRBool FrameStartsCounterScope(nsIFrame* aFrame);
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nsresult UpdateBulletPosition(nsBlockReflowState& aState);
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void ReflowBullet(nsBlockReflowState& aState,
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nsHTMLReflowMetrics& aMetrics);
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//----------------------------------------
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nsLineList* GetOverflowLines(nsIPresContext* aPresContext,
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PRBool aRemoveProperty) const;
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nsresult SetOverflowLines(nsIPresContext* aPresContext,
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nsLineList* aOverflowLines);
|
|
|
|
nsIFrame* LastChild();
|
|
|
|
#ifdef NS_DEBUG
|
|
PRBool IsChild(nsIPresContext* aPresContext, nsIFrame* aFrame);
|
|
void VerifyLines(PRBool aFinalCheckOK);
|
|
void VerifyOverflowSituation(nsIPresContext* aPresContext);
|
|
PRInt32 GetDepth() const;
|
|
#endif
|
|
|
|
// Ascent of our first line to support 'vertical-align: baseline' in table-cells
|
|
nscoord mAscent;
|
|
|
|
nsLineList mLines;
|
|
|
|
// List of all floaters in this block
|
|
nsFrameList mFloaters;
|
|
|
|
// XXX_fix_me: subclass one more time!
|
|
// For list-item frames, this is the bullet frame.
|
|
nsBulletFrame* mBullet;
|
|
|
|
friend class nsBlockReflowState;
|
|
|
|
private:
|
|
nsAbsoluteContainingBlock mAbsoluteContainer;
|
|
|
|
|
|
#ifdef DEBUG
|
|
public:
|
|
static PRBool gLamePaintMetrics;
|
|
static PRBool gLameReflowMetrics;
|
|
static PRBool gNoisy;
|
|
static PRBool gNoisyDamageRepair;
|
|
static PRBool gNoisyMaxElementSize;
|
|
static PRBool gNoisyReflow;
|
|
static PRBool gReallyNoisyReflow;
|
|
static PRBool gNoisySpaceManager;
|
|
static PRBool gVerifyLines;
|
|
static PRBool gDisableResizeOpt;
|
|
|
|
static PRInt32 gNoiseIndent;
|
|
|
|
static const char* kReflowCommandType[];
|
|
|
|
protected:
|
|
static void InitDebugFlags();
|
|
#endif
|
|
};
|
|
|
|
#endif /* nsBlockFrame_h___ */
|
|
|