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423 lines
15 KiB
C++
423 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 1.0 (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"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the 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 Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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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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class nsBlockReflowState;
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class nsBulletFrame;
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class nsLineBox;
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class nsTextRun;
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class nsFirstLineFrame;
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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_LAST_LIST_INDEX NS_BLOCK_FRAME_BULLET_LIST_INDEX
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/**
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* Additional frame-state bits
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*/
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#define NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET 0x80000000
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#define NS_BLOCK_IS_HTML_PARAGRAPH 0x40000000
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#define NS_BLOCK_HAS_FIRST_LINE_STYLE 0x20000000
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#define NS_BLOCK_HAS_FIRST_LETTER_STYLE 0x10000000
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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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// Base class for block and inline frames
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class nsBlockFrame : public nsBlockFrameSuper
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{
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public:
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friend nsresult NS_NewBlockFrame(nsIFrame** aNewFrame);
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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(nsIAtom* aListName, 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 DeleteFrame(nsIPresContext& aPresContext);
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NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const;
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NS_IMETHOD ReResolveStyleContext(nsIPresContext* aPresContext,
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nsIStyleContext* aParentContext,
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PRInt32 aParentChange,
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nsStyleChangeList* aChangeList,
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PRInt32* aLocalChange);
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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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NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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NS_IMETHOD VerifyTree() const;
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NS_IMETHOD GetFrameForPoint(const nsPoint& aPoint, 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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// 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 MoveInSpaceManager(nsIPresContext* aPresContext,
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nsISpaceManager* aSpaceManager,
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nscoord aDeltaX, nscoord aDeltaY);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsIAtom* aAttribute,
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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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nsIFrame* GetTopBlockChild();
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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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nsIStyleContext* GetFirstLineStyle(nsIPresContext* aPresContext);
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void SetFlags(PRUint32 aFlags) {
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mFlags = aFlags;
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}
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PRBool HaveOutsideBullet() const {
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return 0 != (mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
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}
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void SlideLine(nsIPresContext* aPresContext,
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nsISpaceManager* aSpaceManager,
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nsLineBox* aLine, nscoord aDY);
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void SlideFloaters(nsIPresContext* aPresContext,
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nsISpaceManager* aSpaceManager,
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nsLineBox* aLine, nscoord aDY);
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PRBool DrainOverflowLines();
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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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void MarkEmptyLines(nsIPresContext* aPresContext);
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nsresult AddFrames(nsIPresContext* aPresContext,
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nsIFrame* aFrameList,
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nsIFrame* aPrevSibling);
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nsresult AddFirstLineFrames(nsIPresContext* aPresContext,
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nsFirstLineFrame* aLineFrame,
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nsIFrame* aFrameList,
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nsIFrame* aPrevSibling);
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nsIFrame* TakeKidsFromLineFrame(nsFirstLineFrame* aLineFrame,
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nsIFrame* aFromKid);
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void FixParentAndView(nsIPresContext* aPresContext, nsIFrame* aFrame);
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nsresult DoRemoveFrame(nsIPresContext* aPresContext,
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nsIFrame* aDeletedFrame);
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nsresult RemoveFirstLineFrame(nsIPresContext* aPresContext,
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nsFirstLineFrame* aLineFrame,
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nsIFrame* aDeletedFrame);
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nsresult WrapFramesInFirstLineFrame(nsIPresContext* aPresContext);
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nsresult PrepareInitialReflow(nsBlockReflowState& aState);
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nsresult PrepareStyleChangedReflow(nsBlockReflowState& aState);
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nsresult PrepareChildIncrementalReflow(nsBlockReflowState& aState);
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nsresult PrepareResizeReflow(nsBlockReflowState& aState);
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nsresult ReflowDirtyLines(nsBlockReflowState& aState);
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void RecoverStateFrom(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nscoord aDeltaY);
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//----------------------------------------
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// Methods for line reflow
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// XXX nuke em
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nsresult ReflowLine(nsBlockReflowState& aState,
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nsLineBox* aLine,
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PRBool* aKeepReflowGoing);
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virtual void DidReflowLine(nsBlockReflowState& aState,
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nsLineBox* aLine,
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PRBool aKeepReflowGoing);
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nsresult PlaceLine(nsBlockReflowState& aState,
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nsLineBox* aLine,
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PRBool* aKeepReflowGoing);
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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, nsLineBox* aLine);
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void FindFloaters(nsLineBox* aLine);
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void DeleteLine(nsBlockReflowState& aState, nsLineBox* aLine);
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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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nsLineBox* aLine,
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PRBool* aKeepGoing);
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nsresult ReflowInlineFrames(nsBlockReflowState& aState,
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nsLineBox* aLine,
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PRBool* aKeepLineGoing);
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nsresult ReflowInlineFrame(nsBlockReflowState& aState,
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nsLineBox* 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& aCombinedRect,
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nsMargin& aMarginResult);
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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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nsLineBox* aLine,
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nsIFrame* aFrame);
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nsBlockFrame* FindFollowingBlockFrame(nsIFrame* aFrame);
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nsresult PullFrame(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nsIFrame*& aFrameResult);
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nsresult PullFrame(nsBlockReflowState& aState,
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nsLineBox* aToLine,
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nsLineBox** aFromList,
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PRBool aUpdateGeometricParent,
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nsIFrame*& aFrameResult,
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PRBool& aStopPulling);
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void PushLines(nsBlockReflowState& aState);
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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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void PaintFloaters(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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nsLineBox* FindLineFor(nsIFrame* aFrame, nsLineBox** aPrevLineResult,
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PRBool* aIsFloaterResult);
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void PropogateReflowDamage(nsBlockReflowState& aState,
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nsLineBox* aLine,
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nscoord aDeltaY);
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nsresult ComputeTextRuns(nsIPresContext* aPresContext);
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void BuildFloaterList();
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void RenumberLists();
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void UpdateBulletPosition();
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void ReflowBullet(nsBlockReflowState& aState,
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nsHTMLReflowMetrics& aMetrics);
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nsIFrame* LastChild();
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#ifdef NS_DEBUG
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PRBool IsChild(nsIFrame* aFrame);
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void VerifyLines(PRBool aFinalCheckOK);
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void VerifyOverflowSituation();
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PRInt32 GetDepth() const;
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#endif
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nsLineBox* mLines;
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nsLineBox* mOverflowLines;
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// XXX subclass!
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PRUint32 mFlags;
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// Text run information
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nsTextRun* mTextRuns;
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// List of all floaters in this block
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nsFrameList mFloaters;
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// XXX_fix_me: subclass one more time!
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// For list-item frames, this is the bullet frame.
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nsBulletFrame* mBullet;
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friend class nsBlockReflowState;
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};
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//----------------------------------------------------------------------
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#define nsAnonymousBlockFrameSuper nsBlockFrame
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// Anonymous block frame. An anonymous block is used by some other
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// container (the parent frame) to provide block reflow for a set of
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// child frames. The parent is responsible for the maintainance of the
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// anonymous blocks child list. To accomplish this, the normal methods
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// for managing the child list (AppendFrames, InsertFrames, and
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// RemoveFrame) forward the operation to the parent frame (the
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// container of the anonymous block).
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class nsAnonymousBlockFrame : public nsAnonymousBlockFrameSuper {
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public:
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friend nsresult NS_NewAnonymousBlockFrame(nsIFrame** aNewFrame);
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// nsIFrame overrides
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// AppendFrames/InsertFrames/RemoveFrame are implemented to forward
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// the method call to the parent frame.
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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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// These methods are used by the parent frame to actually modify the
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// child frames of the anonymous block frame.
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nsresult AppendFrames2(nsIPresContext* aPresContext,
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nsIPresShell* aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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nsresult InsertFrames2(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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nsresult RemoveFrame2(nsIPresContext* aPresContext,
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nsIPresShell* aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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// Take the first frame away from the anonymous block frame. The
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// caller is responsible for the first frames final disposition
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// (e.g. deleting it if it wants to).
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void RemoveFirstFrame();
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// Remove from the blocks list of children the frames starting at
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// aFrame until the end of the child list. The caller is responsible
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// for the first frames final disposition (e.g. deleting it if it
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// wants to).
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void RemoveFramesFrom(nsIFrame* aFrame);
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protected:
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nsAnonymousBlockFrame();
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~nsAnonymousBlockFrame();
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};
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#endif /* nsBlockFrame_h___ */
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