/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Communicator client code. * * The Initial Developer of the Original Code is Netscape Communications * Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): */ #ifndef nsBlockFrame_h___ #define nsBlockFrame_h___ #include "nsHTMLContainerFrame.h" #include "nsHTMLParts.h" #include "nsAbsoluteContainingBlock.h" class nsBlockReflowState; class nsBulletFrame; class nsLineBox; class nsFirstLineFrame; /** * Child list name indices * @see #GetAdditionalChildListName() */ #define NS_BLOCK_FRAME_FLOATER_LIST_INDEX 0 #define NS_BLOCK_FRAME_BULLET_LIST_INDEX 1 #define NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX 2 #define NS_BLOCK_FRAME_LAST_LIST_INDEX NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX /** * Additional frame-state bits. There are more of these bits * defined in nsHTMLParts.h (XXX: note: this should be cleaned up) */ #define NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET 0x40000000 #define NS_BLOCK_HAS_FIRST_LETTER_STYLE 0x20000000 #define nsBlockFrameSuper nsHTMLContainerFrame #define NS_BLOCK_FRAME_CID \ { 0xa6cf90df, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}} extern const nsIID kBlockFrameCID; /* * Base class for block and inline frames. * The block frame has an additional named child list: * - "Absolute-list" which contains the absolutely positioned frames * * @see nsLayoutAtoms::absoluteList */ class nsBlockFrame : public nsBlockFrameSuper { public: friend nsresult NS_NewBlockFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags); // nsISupports NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr); // nsIFrame NS_IMETHOD Init(nsIPresContext* aPresContext, nsIContent* aContent, nsIFrame* aParent, nsIStyleContext* aContext, nsIFrame* aPrevInFlow); NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext, nsIAtom* aListName, nsIFrame* aChildList); NS_IMETHOD AppendFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aFrameList); NS_IMETHOD InsertFrames(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aPrevFrame, nsIFrame* aFrameList); NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext, nsIPresShell& aPresShell, nsIAtom* aListName, nsIFrame* aOldFrame); NS_IMETHOD FirstChild(nsIPresContext* aPresContext, nsIAtom* aListName, nsIFrame** aFirstChild) const; NS_IMETHOD GetAdditionalChildListName(PRInt32 aIndex, nsIAtom** aListName) const; NS_IMETHOD Destroy(nsIPresContext* aPresContext); NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const; NS_IMETHOD IsPercentageBase(PRBool& aBase) const; NS_IMETHOD Paint(nsIPresContext* aPresContext, nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect, nsFramePaintLayer aWhichLayer); NS_IMETHOD GetFrameType(nsIAtom** aType) const; #ifdef DEBUG NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const; NS_IMETHOD GetFrameName(nsString& aResult) const; NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const; NS_IMETHOD VerifyTree() const; #endif NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext, const nsPoint& aPoint, nsFramePaintLayer aWhichLayer, nsIFrame** aFrame); NS_IMETHOD HandleEvent(nsIPresContext* aPresContext, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild); // nsIHTMLReflow NS_IMETHOD Reflow(nsIPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus); NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext, nsIContent* aChild, PRInt32 aNameSpaceID, nsIAtom* aAttribute, PRInt32 aHint); #ifdef DO_SELECTION NS_IMETHOD HandleEvent(nsIPresContext* aPresContext, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); NS_IMETHOD HandleDrag(nsIPresContext* aPresContext, nsGUIEvent* aEvent, nsEventStatus* aEventStatus); nsIFrame * FindHitFrame(nsBlockFrame * aBlockFrame, const nscoord aX, const nscoord aY, const nsPoint & aPoint); #endif virtual void DeleteChildsNextInFlow(nsIPresContext* aPresContext, nsIFrame* aNextInFlow); /** return the topmost block child based on y-index. * almost always the first or second line, if there is one. * accounts for lines that hold only compressed white space, etc. */ nsIFrame* GetTopBlockChild(); /** Place the floaters in the spacemanager for all lines in this block. * recursively adds floaters in child blocks of this frame. */ nsresult UpdateSpaceManager(nsIPresContext* aPresContext, nsISpaceManager* aSpaceManager); nsLineBox* FindLineFor(nsIFrame* aFrame, nsLineBox** aPrevLineResult, PRBool* aIsFloaterResult); static nsresult GetCurrentLine(nsBlockReflowState *aState, nsLineBox **aOutCurrentLine); // return our ascent (i.e., ascent of our first line) // to support 'vertical-align: baseline' in table-cells nscoord GetAscent() const; protected: nsBlockFrame(); virtual ~nsBlockFrame(); nsIStyleContext* GetFirstLetterStyle(nsIPresContext* aPresContext); void SetFlags(PRUint32 aFlags) { mState &= ~NS_BLOCK_FLAGS_MASK; mState |= aFlags; } PRBool HaveOutsideBullet() const { return 0 != (mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET); } /** return PR_TRUE if the incremental reflow described by aState is 100% contained * within the bounds of a ancestor frame, relative to this frame. */ PRBool IsIncrementalDamageConstrained(const nsBlockReflowState& aState) const; /** move the frames contained by aLine by aDY * if aLine is a block, it's child floaters are added to the state manager */ void SlideLine(nsBlockReflowState& aState, nsLineBox* aLine, nscoord aDY); /** grab overflow lines from this block's prevInFlow, and make them * part of this block's mLines list. * @return PR_TRUE if any lines were drained. */ PRBool DrainOverflowLines(nsIPresContext* aPresContext); virtual PRIntn GetSkipSides() const; virtual void ComputeFinalSize(const nsHTMLReflowState& aReflowState, nsBlockReflowState& aState, nsHTMLReflowMetrics& aMetrics); /** add the frames in aFrameList to this block after aPrevSibling * this block thinks in terms of lines, but the frame construction code * knows nothing about lines at all. So we need to find the line that * contains aPrevSibling and add aFrameList after aPrevSibling on that line. * new lines are created as necessary to handle block data in aFrameList. */ nsresult AddFrames(nsIPresContext* aPresContext, nsIFrame* aFrameList, nsIFrame* aPrevSibling); /** move the frame list rooted at aFrame into this as a child * assumes prev/next sibling pointers will be or have been set elsewhere * changes aFrame's parent to be this, and reparents aFrame's view and stylecontext. */ void FixParentAndView(nsIPresContext* aPresContext, nsIFrame* aFrame); /** does all the real work for removing aDeletedFrame from this * finds the line containing aFrame. * handled continued frames * marks lines dirty as needed */ nsresult DoRemoveFrame(nsIPresContext* aPresContext, nsIFrame* aDeletedFrame); /** set up the conditions necessary for an initial reflow */ nsresult PrepareInitialReflow(nsBlockReflowState& aState); /** set up the conditions necessary for an styleChanged reflow */ nsresult PrepareStyleChangedReflow(nsBlockReflowState& aState); /** set up the conditions necessary for an incremental reflow. * the primary task is to mark the minimumly sufficient lines dirty. */ nsresult PrepareChildIncrementalReflow(nsBlockReflowState& aState); /** set up the conditions necessary for an resize reflow * the primary task is to mark the minimumly sufficient lines dirty. */ nsresult PrepareResizeReflow(nsBlockReflowState& aState); /** reflow all lines that have been marked dirty */ nsresult ReflowDirtyLines(nsBlockReflowState& aState); /** set aState to what it would be if we had done a full reflow to this point. */ void RecoverStateFrom(nsBlockReflowState& aState, nsLineBox* aLine, nscoord aDeltaY, nsRect* aDamageRect); //---------------------------------------- // Methods for line reflow /** * Reflow a line. * @param aState the current reflow state * @param aLine the line to reflow. can contain a single block frame * or contain 1 or more inline frames. * @param aKeepReflowGoing [OUT] indicates whether the caller should continue to reflow more lines * @param aDamageDirtyArea if PR_TRUE, do extra work to mark the changed areas as damaged for painting * this indicates that frames may have changed size, for example */ nsresult ReflowLine(nsBlockReflowState& aState, nsLineBox* aLine, PRBool* aKeepReflowGoing, PRBool aDamageDirtyArea = PR_FALSE); nsresult PlaceLine(nsBlockReflowState& aState, nsLineLayout& aLineLayout, nsLineBox* aLine, PRBool* aKeepReflowGoing, PRBool aUpdateMaximumWidth); nsresult MarkLineDirty (nsLineBox* aLine, nsLineBox* aPrevLine); // XXX blech void PostPlaceLine(nsBlockReflowState& aState, nsLineBox* aLine, const nsSize& aMaxElementSize); void ComputeLineMaxElementSize(nsBlockReflowState& aState, nsLineBox* aLine, nsSize* aMaxElementSize); // XXX where to go PRBool ShouldJustifyLine(nsBlockReflowState& aState, nsLineBox* aLine); void DeleteLine(nsBlockReflowState& aState, nsLineBox* aLine); //---------------------------------------- // Methods for individual frame reflow PRBool ShouldApplyTopMargin(nsBlockReflowState& aState, nsLineBox* aLine); nsresult ReflowBlockFrame(nsBlockReflowState& aState, nsLineBox* aLine, PRBool* aKeepGoing); nsresult ReflowInlineFrames(nsBlockReflowState& aState, nsLineBox* aLine, PRBool* aKeepLineGoing, PRBool aDamageDirtyArea, PRBool aUpdateMaximumWidth = PR_FALSE); nsresult DoReflowInlineFrames(nsBlockReflowState& aState, nsLineLayout& aLineLayout, nsLineBox* aLine, PRBool* aKeepReflowGoing, PRUint8* aLineReflowStatus, PRBool aUpdateMaximumWidth, PRBool aDamageDirtyArea); nsresult DoReflowInlineFramesAuto(nsBlockReflowState& aState, nsLineBox* aLine, PRBool* aKeepReflowGoing, PRUint8* aLineReflowStatus, PRBool aUpdateMaximumWidth, PRBool aDamageDirtyArea); nsresult DoReflowInlineFramesMalloc(nsBlockReflowState& aState, nsLineBox* aLine, PRBool* aKeepReflowGoing, PRUint8* aLineReflowStatus, PRBool aUpdateMaximumWidth, PRBool aDamageDirtyArea); nsresult ReflowInlineFrame(nsBlockReflowState& aState, nsLineLayout& aLineLayout, nsLineBox* aLine, nsIFrame* aFrame, PRUint8* aLineReflowStatus); nsresult ReflowFloater(nsBlockReflowState& aState, nsPlaceholderFrame* aPlaceholder, nsRect& aCombinedRect, nsMargin& aMarginResult, nsMargin& aComputedOffsetsResult); //---------------------------------------- // Methods for pushing/pulling lines/frames virtual nsresult CreateContinuationFor(nsBlockReflowState& aState, nsLineBox* aLine, nsIFrame* aFrame, PRBool& aMadeNewFrame); nsresult SplitLine(nsBlockReflowState& aState, nsLineLayout& aLineLayout, nsLineBox* aLine, nsIFrame* aFrame); nsBlockFrame* FindFollowingBlockFrame(nsIFrame* aFrame); nsresult PullFrame(nsBlockReflowState& aState, nsLineBox* aLine, PRBool aDamageDeletedLine, nsIFrame*& aFrameResult); nsresult PullFrame(nsBlockReflowState& aState, nsLineBox* aToLine, nsLineBox** aFromList, PRBool aUpdateGeometricParent, PRBool aDamageDeletedLines, nsIFrame*& aFrameResult, PRBool& aStopPulling); void PushLines(nsBlockReflowState& aState); //---------------------------------------- //XXX virtual void PaintChildren(nsIPresContext* aPresContext, nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect, nsFramePaintLayer aWhichLayer); void PaintFloaters(nsIPresContext* aPresContext, nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect); void PropogateReflowDamage(nsBlockReflowState& aState, nsLineBox* aLine, const nsRect& aOldCombinedArea, nscoord aDeltaY); void BuildFloaterList(); //---------------------------------------- // List handling kludge void RenumberLists(nsIPresContext* aPresContext); PRBool RenumberListsIn(nsIPresContext* aPresContext, nsIFrame* aContainerFrame, PRInt32* aOrdinal, PRInt32 aDepth); PRBool RenumberListsInBlock(nsIPresContext* aPresContext, nsBlockFrame* aContainerFrame, PRInt32* aOrdinal, PRInt32 aDepth); PRBool RenumberListsFor(nsIPresContext* aPresContext, nsIFrame* aKid, PRInt32* aOrdinal, PRInt32 aDepth); PRBool FrameStartsCounterScope(nsIFrame* aFrame); nsresult UpdateBulletPosition(nsBlockReflowState& aState); void ReflowBullet(nsBlockReflowState& aState, nsHTMLReflowMetrics& aMetrics); //---------------------------------------- nsLineBox* GetOverflowLines(nsIPresContext* aPresContext, PRBool aRemoveProperty) const; nsresult SetOverflowLines(nsIPresContext* aPresContext, nsLineBox* aOverflowFrames); 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; nsLineBox* 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; }; #endif /* nsBlockFrame_h___ */