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nsMathMLmtdInnerFrame Class Reference

#include <nsMathMLmtableFrame.h>

Inheritance diagram for nsMathMLmtdInnerFrame:
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List of all members.

Public Types

typedef nsLineList::iterator line_iterator
typedef nsLineList::const_iterator const_line_iterator
typedef
nsLineList::reverse_iterator 
reverse_line_iterator
typedef
nsLineList::const_reverse_iterator 
const_reverse_line_iterator

Public Member Functions

NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD 
UpdatePresentationDataFromChildAt (PRInt32 aFirstIndex, PRInt32 aLastIndex, PRInt32 aScriptLevelIncrement, PRUint32 aFlagsValues, PRUint32 aFlagsToUpdate)
NS_IMETHOD ReResolveScriptStyle (PRInt32 aParentScriptLevel)
NS_IMETHOD Init (nsPresContext *aPresContext, nsIContent *aContent, nsIFrame *aParent, nsStyleContext *aContext, nsIFrame *aPrevInFlow)
NS_IMETHOD Reflow (nsPresContext *aPresContext, nsHTMLReflowMetrics &aDesiredSize, const nsHTMLReflowState &aReflowState, nsReflowStatus &aStatus)
virtual PRBool IsFrameOfType (PRUint32 aFlags) const
line_iterator begin_lines ()
const_line_iterator begin_lines () const
line_iterator end_lines ()
const_line_iterator end_lines () const
reverse_line_iterator rbegin_lines ()
const_reverse_line_iterator rbegin_lines () const
reverse_line_iterator rend_lines ()
const_reverse_line_iterator rend_lines () const
NS_IMETHOD QueryInterface (const nsIID &aIID, void **aInstancePtr)
NS_IMETHOD SetInitialChildList (nsPresContext *aPresContext, nsIAtom *aListName, nsIFrame *aChildList)
NS_IMETHOD AppendFrames (nsIAtom *aListName, nsIFrame *aFrameList)
NS_IMETHOD InsertFrames (nsIAtom *aListName, nsIFrame *aPrevFrame, nsIFrame *aFrameList)
NS_IMETHOD RemoveFrame (nsIAtom *aListName, nsIFrame *aOldFrame)
virtual nsIFrameGetFirstChild (nsIAtom *aListName) const
NS_IMETHOD SetParent (const nsIFrame *aParent)
virtual nsIAtomGetAdditionalChildListName (PRInt32 aIndex) const
NS_IMETHOD Destroy (nsPresContext *aPresContext)
NS_IMETHOD IsSplittable (nsSplittableType &aIsSplittable) const
virtual PRBool IsContainingBlock () const
virtual PRBool IsFloatContainingBlock () const
NS_IMETHOD Paint (nsPresContext *aPresContext, nsIRenderingContext &aRenderingContext, const nsRect &aDirtyRect, nsFramePaintLayer aWhichLayer, PRUint32 aFlags=0)
virtual nsIAtomGetType () const
void ClearLineCursor ()
nsLineBoxGetFirstLineContaining (nscoord y)
void SetupLineCursor ()
nsresult GetFrameForPointUsing (const nsPoint &aPoint, nsIAtom *aList, nsFramePaintLayer aWhichLayer, PRBool aConsiderSelf, nsIFrame **aFrame)
NS_IMETHOD GetFrameForPoint (const nsPoint &aPoint, nsFramePaintLayer aWhichLayer, nsIFrame **aFrame)
NS_IMETHOD HandleEvent (nsPresContext *aPresContext, nsGUIEvent *aEvent, nsEventStatus *aEventStatus)
NS_IMETHOD ReflowDirtyChild (nsIPresShell *aPresShell, nsIFrame *aChild)
NS_IMETHOD IsVisibleForPainting (nsPresContext *aPresContext, nsIRenderingContext &aRenderingContext, PRBool aCheckVis, PRBool *aIsVisible)
virtual PRBool IsEmpty ()
virtual PRBool IsSelfEmpty ()
NS_IMETHOD AttributeChanged (nsIContent *aChild, PRInt32 aNameSpaceID, nsIAtom *aAttribute, PRInt32 aModType)
virtual void DeleteNextInFlowChild (nsPresContext *aPresContext, nsIFrame *aNextInFlow)
PRBool CheckForCollapsedBottomMarginFromClearanceLine ()
 Determines whether the collapsed margin carried out of the last line includes the margin-top of a line with clearance (in which case we must avoid collapsing that margin with our bottom margin)
nsIFrameGetTopBlockChild (nsPresContext *aPresContext)
 return the topmost block child based on y-index.
line_iterator FindLineFor (nsIFrame *aFrame)
nscoord GetAscent ()
nsresult SplitPlaceholder (nsBlockReflowState &aState, nsIFrame *aPlaceholder)
void UndoSplitPlaceholders (nsBlockReflowState &aState, nsIFrame *aLastPlaceholder)
virtual void PaintChild (nsPresContext *aPresContext, nsIRenderingContext &aRenderingContext, const nsRect &aDirtyRect, nsIFrame *aFrame, nsFramePaintLayer aWhichLayer, PRUint32 aFlags=0)
PRBool HandleOverflowPlaceholdersForPulledFrame (nsBlockReflowState &aState, nsIFrame *aFrame)
 Call this when a frame will be pulled from the block's next-in-flow into this frame.
PRBool HandleOverflowPlaceholdersOnPulledLine (nsBlockReflowState &aState, nsLineBox *aLine)
 Call this when a line will be pulled from the block's next-in-flow's line.
nsresult DoRemoveFrame (nsIFrame *aDeletedFrame, PRBool aDestroyFrames=PR_TRUE)
 does all the real work for removing aDeletedFrame from this finds the line containing aFrame.
void ReparentFloats (nsIFrame *aFirstFrame, nsBlockFrame *aOldParent, PRBool aFromOverflow, PRBool aReparentSiblings)
 Reparent a whole list of floats from aOldParent to this block.
nsLineListGetOverflowLines () const
NS_IMETHOD QueryInterface (REFNSIID aIID, void **aInstancePtr)
 NS_IMETHOD_ (nsrefcnt) AddRef()
 NS_IMETHOD_ (nsrefcnt) Release()
NS_IMETHOD GetBoundingMetrics (nsBoundingMetrics &aBoundingMetrics)
NS_IMETHOD SetBoundingMetrics (const nsBoundingMetrics &aBoundingMetrics)
NS_IMETHOD GetReference (nsPoint &aReference)
NS_IMETHOD SetReference (const nsPoint &aReference)
virtual eMathMLFrameType GetMathMLFrameType ()
NS_IMETHOD Stretch (nsIRenderingContext &aRenderingContext, nsStretchDirection aStretchDirection, nsBoundingMetrics &aContainerSize, nsHTMLReflowMetrics &aDesiredStretchSize)
NS_IMETHOD Place (nsIRenderingContext &aRenderingContext, PRBool aPlaceOrigin, nsHTMLReflowMetrics &aDesiredSize)
NS_IMETHOD GetEmbellishData (nsEmbellishData &aEmbellishData)
NS_IMETHOD SetEmbellishData (const nsEmbellishData &aEmbellishData)
NS_IMETHOD GetPresentationData (nsPresentationData &aPresentationData)
NS_IMETHOD SetPresentationData (const nsPresentationData &aPresentationData)
NS_IMETHOD InheritAutomaticData (nsIFrame *aParent)
NS_IMETHOD TransmitAutomaticData ()
NS_IMETHOD UpdatePresentationData (PRInt32 aScriptLevelIncrement, PRUint32 aFlagsValues, PRUint32 aFlagsToUpdate)

Static Public Member Functions

static nsresult GetCurrentLine (nsBlockReflowState *aState, nsLineBox **aOutCurrentLine)
static void ResolveMathMLCharStyle (nsPresContext *aPresContext, nsIContent *aContent, nsStyleContext *aParenStyleContext, nsMathMLChar *aMathMLChar, PRBool aIsMutableChar)
static void GetEmbellishDataFrom (nsIFrame *aFrame, nsEmbellishData &aEmbellishData)
static void GetPresentationDataFrom (nsIFrame *aFrame, nsPresentationData &aPresentationData, PRBool aClimbTree=PR_TRUE)
static nsresult GetAttribute (nsIContent *aContent, nsIFrame *aMathMLmstyleFrame, nsIAtom *aAttributeAtom, nsString &aValue)
static PRBool ParseNumericValue (nsString &aString, nsCSSValue &aCSSValue)
static nscoord CalcLength (nsPresContext *aPresContext, nsStyleContext *aStyleContext, const nsCSSValue &aCSSValue)
static PRBool ParseNamedSpaceValue (nsIFrame *aMathMLmstyleFrame, nsString &aString, nsCSSValue &aCSSValue)
static eMathMLFrameType GetMathMLFrameTypeFor (nsIFrame *aFrame)
static void GetItalicCorrection (nsBoundingMetrics &aBoundingMetrics, nscoord &aItalicCorrection)
static void GetItalicCorrection (nsBoundingMetrics &aBoundingMetrics, nscoord &aLeftItalicCorrection, nscoord &aRightItalicCorrection)
static void GetSubDropFromChild (nsIFrame *aChild, nscoord &aSubDrop)
static void GetSupDropFromChild (nsIFrame *aChild, nscoord &aSupDrop)
static void GetSkewCorrectionFromChild (nsIFrame *aChild, nscoord &aSkewCorrection)
static void GetSubScriptShifts (nsIFontMetrics *fm, nscoord &aSubScriptShift1, nscoord &aSubScriptShift2)
static void GetSupScriptShifts (nsIFontMetrics *fm, nscoord &aSupScriptShift1, nscoord &aSupScriptShift2, nscoord &aSupScriptShift3)
static void GetSubDrop (nsIFontMetrics *fm, nscoord &aSubDrop)
static void GetSupDrop (nsIFontMetrics *fm, nscoord &aSupDrop)
static void GetNumeratorShifts (nsIFontMetrics *fm, nscoord &numShift1, nscoord &numShift2, nscoord &numShift3)
static void GetDenominatorShifts (nsIFontMetrics *fm, nscoord &denShift1, nscoord &denShift2)
static void GetEmHeight (nsIFontMetrics *fm, nscoord &emHeight)
static void GetAxisHeight (nsIFontMetrics *fm, nscoord &axisHeight)
static void GetAxisHeight (nsIRenderingContext &aRenderingContext, nsIFontMetrics *aFontMetrics, nscoord &aAxisHeight)
static void GetBigOpSpacings (nsIFontMetrics *fm, nscoord &bigOpSpacing1, nscoord &bigOpSpacing2, nscoord &bigOpSpacing3, nscoord &bigOpSpacing4, nscoord &bigOpSpacing5)
static void GetRuleThickness (nsIFontMetrics *fm, nscoord &ruleThickness)
static void GetRuleThickness (nsIRenderingContext &aRenderingContext, nsIFontMetrics *aFontMetrics, nscoord &aRuleThickness)
static PRInt32 MapAttributesIntoCSS (nsPresContext *aPresContext, nsIContent *aContent)
static PRInt32 MapAttributesIntoCSS (nsPresContext *aPresContext, nsIFrame *aFrame)

Protected Member Functions

 nsMathMLmtdInnerFrame ()
virtual ~nsMathMLmtdInnerFrame ()
virtual PRIntn GetSkipSides () const
virtual void PaintTextDecorationLines (nsIRenderingContext &aRenderingContext, nscolor aColor, nscoord aOffset, nscoord aAscent, nscoord aSize)
nsresult GetClosestLine (nsILineIterator *aLI, const nsPoint &aPoint, PRInt32 &aClosestLine)
 GetClosestLine will return the line that VERTICALLY owns the point closest to aPoint.y aPoint is the point to search for, relative to the origin of the frame that aLI iterates over.
void TryAllLines (nsLineList::iterator *aIterator, nsLineList::iterator *aEndIterator, PRBool *aInOverflowLines)
 This helps us iterate over the list of all normal + overflow lines.
void SetFlags (PRUint32 aFlags)
PRBool HaveOutsideBullet () const
void SlideLine (nsBlockReflowState &aState, nsLineBox *aLine, nscoord aDY)
 move the frames contained by aLine by aDY if aLine is a block, it's child floats are added to the state manager
virtual void ComputeFinalSize (const nsHTMLReflowState &aReflowState, nsBlockReflowState &aState, nsHTMLReflowMetrics &aMetrics)
void ComputeCombinedArea (const nsHTMLReflowState &aReflowState, nsHTMLReflowMetrics &aMetrics)
nsresult AddFrames (nsIFrame *aFrameList, nsIFrame *aPrevSibling)
 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.
PRBool DrainOverflowLines (nsBlockReflowState &aState)
 grab overflow lines from this block's prevInFlow, and make them part of this block's mLines list.
line_iterator RemoveFloat (nsIFrame *aFloat)
 Remove a float from our float list and also the float cache for the line its placeholder is on.
void CollectFloats (nsIFrame *aFrame, nsFrameList &aList, nsIFrame **aTail, PRBool aFromOverflow, PRBool aCollectFromSiblings)
nsresult PrepareInitialReflow (nsBlockReflowState &aState)
 set up the conditions necessary for an initial reflow
nsresult PrepareStyleChangedReflow (nsBlockReflowState &aState)
 set up the conditions necessary for an styleChanged reflow
nsresult PrepareChildIncrementalReflow (nsBlockReflowState &aState)
 set up the conditions necessary for an incremental reflow.
void RetargetInlineIncrementalReflow (nsReflowPath::iterator &aFrame, line_iterator &aLine, nsIFrame *aPrevInFlow)
 Retarget an inline incremental reflow from continuing frames that will be destroyed.
nsresult PrepareResizeReflow (nsBlockReflowState &aState)
 set up the conditions necessary for an resize reflow the primary task is to mark the minimumly sufficient lines dirty.
nsresult ReflowDirtyLines (nsBlockReflowState &aState, PRBool aTryPull)
 reflow all lines that have been marked dirty.
nsresult ReflowLine (nsBlockReflowState &aState, line_iterator aLine, PRBool aTryPull, PRBool *aKeepReflowGoing, PRBool aDamageDirtyArea=PR_FALSE)
 Reflow a line.
PRBool PlaceLine (nsBlockReflowState &aState, nsLineLayout &aLineLayout, line_iterator aLine, PRBool *aKeepReflowGoing, PRBool aUpdateMaximumWidth)
nsresult MarkLineDirty (line_iterator aLine)
 Mark |aLine| dirty, and, if necessary because of possible pull-up, mark the previous line dirty as well.
void PostPlaceLine (nsBlockReflowState &aState, nsLineBox *aLine, nscoord aMaxElementWidth)
PRBool ShouldJustifyLine (nsBlockReflowState &aState, line_iterator aLine)
void DeleteLine (nsBlockReflowState &aState, nsLineList::iterator aLine, nsLineList::iterator aLineEnd)
PRBool ShouldApplyTopMargin (nsBlockReflowState &aState, nsLineBox *aLine)
nsresult ReflowBlockFrame (nsBlockReflowState &aState, line_iterator aLine, PRBool *aKeepGoing)
nsresult ReflowInlineFrames (nsBlockReflowState &aState, line_iterator aLine, PRBool aTryPull, PRBool *aKeepLineGoing, PRBool aDamageDirtyArea, PRBool aUpdateMaximumWidth=PR_FALSE)
nsresult DoReflowInlineFrames (nsBlockReflowState &aState, nsLineLayout &aLineLayout, line_iterator aLine, PRBool *aKeepReflowGoing, PRUint8 *aLineReflowStatus, PRBool aUpdateMaximumWidth, PRBool aDamageDirtyArea, PRBool aAllowPullUp)
nsresult ReflowInlineFrame (nsBlockReflowState &aState, nsLineLayout &aLineLayout, line_iterator aLine, nsIFrame *aFrame, PRUint8 *aLineReflowStatus)
 Reflow an inline frame.
nsresult ReflowFloat (nsBlockReflowState &aState, nsPlaceholderFrame *aPlaceholder, nsFloatCache *aFloatCache, nsReflowStatus &aReflowStatus)
virtual nsresult CreateContinuationFor (nsBlockReflowState &aState, nsLineBox *aLine, nsIFrame *aFrame, PRBool &aMadeNewFrame)
 Create a continuation, if necessary, for aFrame.
void PushTruncatedPlaceholderLine (nsBlockReflowState &aState, line_iterator aLine, nsIFrame *aLastPlaceholder, PRBool &aKeepReflowGoing)
nsresult SplitLine (nsBlockReflowState &aState, nsLineLayout &aLineLayout, line_iterator aLine, nsIFrame *aFrame)
nsresult PullFrame (nsBlockReflowState &aState, line_iterator aLine, PRBool aDamageDeletedLine, nsIFrame *&aFrameResult)
 Pull frame from the next available location (one of our lines or one of our next-in-flows lines).
PRBool PullFrameFrom (nsBlockReflowState &aState, nsLineBox *aLine, nsBlockFrame *aFromContainer, PRBool aFromOverflowLine, nsLineList::iterator aFromLine, PRBool aDamageDeletedLines, nsIFrame *&aFrameResult)
 Try to pull a frame out of a line pointed at by aFromLine.
void PushLines (nsBlockReflowState &aState, nsLineList::iterator aLineBefore)
virtual void PaintChildren (nsPresContext *aPresContext, nsIRenderingContext &aRenderingContext, const nsRect &aDirtyRect, nsFramePaintLayer aWhichLayer, PRUint32 aFlags=0)
void PaintFloats (nsPresContext *aPresContext, nsIRenderingContext &aRenderingContext, const nsRect &aDirtyRect)
void PropagateFloatDamage (nsBlockReflowState &aState, nsLineBox *aLine, nscoord aDeltaY)
 Propagate reflow "damage" from from earlier lines to the current line.
void CheckFloats (nsBlockReflowState &aState)
void RenumberLists (nsPresContext *aPresContext)
PRBool RenumberListsInBlock (nsPresContext *aPresContext, nsBlockFrame *aContainerFrame, PRInt32 *aOrdinal, PRInt32 aDepth)
PRBool RenumberListsFor (nsPresContext *aPresContext, nsIFrame *aKid, PRInt32 *aOrdinal, PRInt32 aDepth)
nsresult UpdateBulletPosition (nsBlockReflowState &aState)
void ReflowBullet (nsBlockReflowState &aState, nsHTMLReflowMetrics &aMetrics)
nsLineListRemoveOverflowLines ()
nsresult SetOverflowLines (nsLineList *aOverflowLines)
nsFrameListGetOverflowPlaceholders () const
nsFrameList GetOverflowOutOfFlows () const
void SetOverflowOutOfFlows (const nsFrameList &aList)
nsIFrameLastChild ()

Static Protected Member Functions

static void DoRemoveOutOfFlowFrame (nsIFrame *aFrame)
static PRBool FrameStartsCounterScope (nsIFrame *aFrame)

Protected Attributes

nscoord mAscent
nsLineList mLines
nsFrameList mFloats
nsBulletFramemBullet
nsPresentationData mPresentationData
nsEmbellishData mEmbellishData
nsBoundingMetrics mBoundingMetrics
nsPoint mReference

Friends

nsresult NS_NewMathMLmtdInnerFrame (nsIPresShell *aPresShell, nsIFrame **aNewFrame)
struct nsAutoOOFFrameList
class nsBlockReflowState
nsresult NS_NewBlockFrame (nsIPresShell *aPresShell, nsIFrame **aNewFrame, PRUint32 aFlags)

Detailed Description

Definition at line 130 of file nsMathMLmtableFrame.h.


Member Typedef Documentation

Definition at line 121 of file nsBlockFrame.h.

Definition at line 123 of file nsBlockFrame.h.

Definition at line 120 of file nsBlockFrame.h.

Definition at line 122 of file nsBlockFrame.h.


Constructor & Destructor Documentation

Definition at line 683 of file nsMathMLmtableFrame.cpp.

{
  // Set the right bits -- see what NS_NewTableCellInnerFrame does
  AddStateBits(NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT);
}

Definition at line 689 of file nsMathMLmtableFrame.cpp.

{
}

Member Function Documentation

nsresult nsBlockFrame::AddFrames ( nsIFrame aFrameList,
nsIFrame aPrevSibling 
) [protected, inherited]

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.

Definition at line 5371 of file nsBlockFrame.cpp.

{
  // Clear our line cursor, since our lines may change.
  ClearLineCursor();

  if (nsnull == aFrameList) {
    return NS_OK;
  }

  // If we're inserting at the beginning of our list and we have an
  // inside bullet, insert after that bullet.
  if (!aPrevSibling && mBullet && !HaveOutsideBullet()) {
    NS_ASSERTION(!nsFrameList(aFrameList).ContainsFrame(mBullet),
                 "Trying to make mBullet prev sibling to itself");
    aPrevSibling = mBullet;
  }
  
  nsIPresShell *presShell = GetPresContext()->PresShell();

  // Attempt to find the line that contains the previous sibling
  nsLineList::iterator prevSibLine = end_lines();
  PRInt32 prevSiblingIndex = -1;
  if (aPrevSibling) {
    // XXX_perf This is technically O(N^2) in some cases, but by using
    // RFind instead of Find, we make it O(N) in the most common case,
    // which is appending cotent.

    // Find the line that contains the previous sibling
    if (! nsLineBox::RFindLineContaining(aPrevSibling,
                                         begin_lines(), prevSibLine,
                                         &prevSiblingIndex)) {
      // Note: defensive code! RFindLineContaining must not return
      // false in this case, so if it does...
      NS_NOTREACHED("prev sibling not in line list");
      aPrevSibling = nsnull;
      prevSibLine = end_lines();
    }
  }

  // Find the frame following aPrevSibling so that we can join up the
  // two lists of frames.
  nsIFrame* prevSiblingNextFrame = nsnull;
  if (aPrevSibling) {
    prevSiblingNextFrame = aPrevSibling->GetNextSibling();

    // Split line containing aPrevSibling in two if the insertion
    // point is somewhere in the middle of the line.
    PRInt32 rem = prevSibLine->GetChildCount() - prevSiblingIndex - 1;
    if (rem) {
      // Split the line in two where the frame(s) are being inserted.
      nsLineBox* line = NS_NewLineBox(presShell, prevSiblingNextFrame, rem, PR_FALSE);
      if (!line) {
        return NS_ERROR_OUT_OF_MEMORY;
      }
      mLines.after_insert(prevSibLine, line);
      prevSibLine->SetChildCount(prevSibLine->GetChildCount() - rem);
      prevSibLine->MarkDirty();
    }

    // Now (partially) join the sibling lists together
    aPrevSibling->SetNextSibling(aFrameList);
  }
  else if (! mLines.empty()) {
    prevSiblingNextFrame = mLines.front()->mFirstChild;
  }

  // Walk through the new frames being added and update the line data
  // structures to fit.
  nsIFrame* newFrame = aFrameList;
  while (newFrame) {
    PRBool isBlock = nsLineLayout::TreatFrameAsBlock(newFrame);

    // If the frame is a block frame, or if there is no previous line or if the
    // previous line is a block line or ended with a <br> then make a new line.
    if (isBlock || prevSibLine == end_lines() || prevSibLine->IsBlock() ||
        (aPrevSibling && ShouldPutNextSiblingOnNewLine(aPrevSibling))) {
      // Create a new line for the frame and add its line to the line
      // list.
      nsLineBox* line = NS_NewLineBox(presShell, newFrame, 1, isBlock);
      if (!line) {
        return NS_ERROR_OUT_OF_MEMORY;
      }
      if (prevSibLine != end_lines()) {
        // Append new line after prevSibLine
        mLines.after_insert(prevSibLine, line);
        ++prevSibLine;
      }
      else {
        // New line is going before the other lines
        mLines.push_front(line);
        prevSibLine = begin_lines();
      }
    }
    else {
      prevSibLine->SetChildCount(prevSibLine->GetChildCount() + 1);
      prevSibLine->MarkDirty();
    }

    aPrevSibling = newFrame;
    newFrame = newFrame->GetNextSibling();
  }
  if (prevSiblingNextFrame) {
    // Connect the last new frame to the remainder of the sibling list
    aPrevSibling->SetNextSibling(prevSiblingNextFrame);
  }

#ifdef DEBUG
  VerifyLines(PR_TRUE);
#endif
  return NS_OK;
}

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NS_IMETHODIMP nsBlockFrame::AppendFrames ( nsIAtom aListName,
nsIFrame aFrameList 
) [inherited]

Reimplemented in nsMathMLmathBlockFrame, nsMathMLForeignFrameWrapper, and nsSVGForeignObjectFrame.

Definition at line 5275 of file nsBlockFrame.cpp.

{
  if (nsnull == aFrameList) {
    return NS_OK;
  }
  if (mAbsoluteContainer.GetChildListName() == aListName) {
    return mAbsoluteContainer.AppendFrames(this, aListName, aFrameList);
  }
  else if (nsLayoutAtoms::floatList == aListName) {
    mFloats.AppendFrames(nsnull, aFrameList);
    return NS_OK;
  }
  else if (nsnull != aListName) {
    return NS_ERROR_INVALID_ARG;
  }

  // Find the proper last-child for where the append should go
  nsIFrame* lastKid = nsnull;
  nsLineBox* lastLine = mLines.empty() ? nsnull : mLines.back();
  if (lastLine) {
    lastKid = lastLine->LastChild();
  }

  // Add frames after the last child
#ifdef NOISY_REFLOW_REASON
  ListTag(stdout);
  printf(": append ");
  nsFrame::ListTag(stdout, aFrameList);
  if (lastKid) {
    printf(" after ");
    nsFrame::ListTag(stdout, lastKid);
  }
  printf("\n");
#endif
  nsresult rv = AddFrames(aFrameList, lastKid);
  if (NS_SUCCEEDED(rv)) {
    // Ask the parent frame to reflow me.
    ReflowDirtyChild(GetPresContext()->PresShell(), nsnull);
  }
  return rv;
}

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NS_IMETHODIMP nsBlockFrame::AttributeChanged ( nsIContent aChild,
PRInt32  aNameSpaceID,
nsIAtom aAttribute,
PRInt32  aModType 
) [inherited]

Reimplemented in nsIsIndexFrame, and nsFileControlFrame.

Definition at line 3046 of file nsBlockFrame.cpp.

{
  nsresult rv = nsBlockFrameSuper::AttributeChanged(aChild, aNameSpaceID,
                                                    aAttribute, aModType);

  if (NS_FAILED(rv)) {
    return rv;
  }
  if (nsHTMLAtoms::start == aAttribute) {
    nsPresContext* presContext = GetPresContext();

    // XXX Not sure if this is necessary anymore
    RenumberLists(presContext);

    rv = presContext->PresShell()->
      AppendReflowCommand(this, eReflowType_ContentChanged, nsnull);
  }
  else if (nsHTMLAtoms::value == aAttribute) {
    const nsStyleDisplay* styleDisplay = GetStyleDisplay();
    if (NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) {
      nsIFrame* nextAncestor = mParent;
      nsBlockFrame* blockParent = nsnull;
      
      // Search for the closest ancestor that's a block frame. We
      // make the assumption that all related list items share a
      // common block parent.
      // XXXldb I think that's a bad assumption.
      while (nextAncestor) {
        if (NS_OK == nextAncestor->QueryInterface(kBlockFrameCID, 
                                                  (void**)&blockParent)) {
          break;
        }
        nextAncestor = nextAncestor->GetParent();
      }

      // Tell the enclosing block frame to renumber list items within
      // itself
      if (nsnull != blockParent) {
        nsPresContext* presContext = GetPresContext();
        // XXX Not sure if this is necessary anymore
        blockParent->RenumberLists(presContext);

        rv = presContext->PresShell()->
          AppendReflowCommand(blockParent, eReflowType_ContentChanged, nsnull);
      }
    }
  }

  return rv;
}

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line_iterator nsBlockFrame::begin_lines ( ) [inline, inherited]

Definition at line 125 of file nsBlockFrame.h.

{ return mLines.begin(); }

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const_line_iterator nsBlockFrame::begin_lines ( ) const [inline, inherited]

Definition at line 127 of file nsBlockFrame.h.

{ return mLines.begin(); }

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nscoord nsMathMLFrame::CalcLength ( nsPresContext aPresContext,
nsStyleContext aStyleContext,
const nsCSSValue aCSSValue 
) [static, inherited]

Definition at line 418 of file nsMathMLFrame.cpp.

{
  NS_ASSERTION(aCSSValue.IsLengthUnit(), "not a length unit");

  if (aCSSValue.IsFixedLengthUnit()) {
    return aCSSValue.GetLengthTwips();
  }

  nsCSSUnit unit = aCSSValue.GetUnit();

  if (eCSSUnit_Pixel == unit) {
    return NSFloatPixelsToTwips(aCSSValue.GetFloatValue(),
                                aPresContext->ScaledPixelsToTwips());
  }
  else if (eCSSUnit_EM == unit) {
    const nsStyleFont* font = aStyleContext->GetStyleFont();
    return NSToCoordRound(aCSSValue.GetFloatValue() * (float)font->mFont.size);
  }
  else if (eCSSUnit_XHeight == unit) {
    nscoord xHeight;
    const nsStyleFont* font = aStyleContext->GetStyleFont();
    nsCOMPtr<nsIFontMetrics> fm = aPresContext->GetMetricsFor(font->mFont);
    fm->GetXHeight(xHeight);
    return NSToCoordRound(aCSSValue.GetFloatValue() * (float)xHeight);
  }

  return 0;
}

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void nsBlockFrame::CheckFloats ( nsBlockReflowState aState) [protected, inherited]

Definition at line 7581 of file nsBlockFrame.cpp.

{
#ifdef DEBUG
  // Check that the float list is what we would have built
  nsAutoVoidArray lineFloats;
  for (line_iterator line = begin_lines(), line_end = end_lines();
       line != line_end; ++line) {
    if (line->HasFloats()) {
      nsFloatCache* fc = line->GetFirstFloat();
      while (fc) {
        nsIFrame* floatFrame = fc->mPlaceholder->GetOutOfFlowFrame();
        lineFloats.AppendElement(floatFrame);
        fc = fc->Next();
      }
    }
  }
  
  nsAutoVoidArray storedFloats;
  PRBool equal = PR_TRUE;
  PRInt32 i = 0;
  for (nsIFrame* f = mFloats.FirstChild(); f; f = f->GetNextSibling()) {
    storedFloats.AppendElement(f);
    if (i < lineFloats.Count() && lineFloats.ElementAt(i) != f) {
      equal = PR_FALSE;
    }
    ++i;
  }

  if (!equal || lineFloats.Count() != storedFloats.Count()) {
    NS_WARNING("nsBlockFrame::CheckFloats: Explicit float list is out of sync with float cache");
#if defined(DEBUG_roc)
    nsIFrameDebug::RootFrameList(GetPresContext(), stdout, 0);
    for (i = 0; i < lineFloats.Count(); ++i) {
      printf("Line float: %p\n", lineFloats.ElementAt(i));
    }
    for (i = 0; i < storedFloats.Count(); ++i) {
      printf("Stored float: %p\n", storedFloats.ElementAt(i));
    }
#endif
  }
#endif

  nsFrameList oofs = GetOverflowOutOfFlows();
  if (oofs.NotEmpty()) {
    // Floats that were pushed should be removed from our space
    // manager.  Otherwise the space manager's YMost or XMost might
    // be larger than necessary, causing this block to get an
    // incorrect desired height (or width).  Some of these floats
    // may not actually have been added to the space manager because
    // they weren't reflowed before being pushed; that's OK,
    // RemoveRegions will ignore them. It is safe to do this here
    // because we know from here on the space manager will only be
    // used for its XMost and YMost, not to place new floats and
    // lines.
    aState.mSpaceManager->RemoveTrailingRegions(oofs.FirstChild());
  }
}

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Determines whether the collapsed margin carried out of the last line includes the margin-top of a line with clearance (in which case we must avoid collapsing that margin with our bottom margin)

Definition at line 1208 of file nsBlockFrame.cpp.

{
  line_iterator begin = begin_lines();
  line_iterator line = end_lines();

  while (PR_TRUE) {
    if (begin == line) {
      return PR_FALSE;
    }
    --line;
    if (line->mBounds.height != 0 || !line->CachedIsEmpty()) {
      return PR_FALSE;
    }
    if (line->HasClearance()) {
      return PR_TRUE;
    }
  }
  // not reached
}

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Definition at line 6840 of file nsBlockFrame.cpp.

                                   {
  if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
    return;
  }

  UnsetProperty(nsLayoutAtoms::lineCursorProperty);
  RemoveStateBits(NS_BLOCK_HAS_LINE_CURSOR);
}

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void nsBlockFrame::CollectFloats ( nsIFrame aFrame,
nsFrameList aList,
nsIFrame **  aTail,
PRBool  aFromOverflow,
PRBool  aCollectFromSiblings 
) [protected, inherited]

Definition at line 7547 of file nsBlockFrame.cpp.

                                                                                {
  while (aFrame) {
    // Don't descend into float containing blocks.
    if (!aFrame->IsFloatContainingBlock()) {
      nsIFrame *outOfFlowFrame = nsLayoutUtils::GetFloatFromPlaceholder(aFrame);
      if (outOfFlowFrame) {
        // Make sure that its parent is us. Otherwise we don't want
        // to mess around with it because it belongs to someone
        // else. I think this could happen if the overflow lines
        // contain a block descendant which owns its own floats.
        NS_ASSERTION(outOfFlowFrame->GetParent() == this,
                     "Out of flow frame doesn't have the expected parent");
        if (aFromOverflow) {
          nsAutoOOFFrameList oofs(this);
          oofs.mList.RemoveFrame(outOfFlowFrame);
        } else {
          mFloats.RemoveFrame(outOfFlowFrame);
          
        }
        aList.InsertFrame(nsnull, *aTail, outOfFlowFrame);
        *aTail = outOfFlowFrame;
      }

      CollectFloats(aFrame->GetFirstChild(nsnull), aList, aTail, aFromOverflow,
                      PR_TRUE);
    }
    if (!aCollectSiblings)
      break;
    aFrame = aFrame->GetNextSibling();
  }
}

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void nsBlockFrame::ComputeCombinedArea ( const nsHTMLReflowState aReflowState,
nsHTMLReflowMetrics aMetrics 
) [protected, inherited]

Definition at line 1538 of file nsBlockFrame.cpp.

{
  // Compute the combined area of our children
  // XXX_perf: This can be done incrementally.  It is currently one of
  // the things that makes incremental reflow O(N^2).
  nsRect area(0, 0, aMetrics.width, aMetrics.height);
  if (NS_STYLE_OVERFLOW_CLIP != aReflowState.mStyleDisplay->mOverflowX) {
    for (line_iterator line = begin_lines(), line_end = end_lines();
         line != line_end;
         ++line) {
      area.UnionRect(area, line->GetCombinedArea());
    }

    // Factor the bullet in; normally the bullet will be factored into
    // the line-box's combined area. However, if the line is a block
    // line then it won't; if there are no lines, it won't. So just
    // factor it in anyway (it can't hurt if it was already done).
    // XXXldb Can we just fix GetCombinedArea instead?
    if (mBullet) {
      area.UnionRect(area, mBullet->GetRect());
    }
  }
#ifdef NOISY_COMBINED_AREA
  ListTag(stdout);
  printf(": ca=%d,%d,%d,%d\n", area.x, area.y, area.width, area.height);
#endif

  aMetrics.mOverflowArea = area;
}

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void nsBlockFrame::ComputeFinalSize ( const nsHTMLReflowState aReflowState,
nsBlockReflowState aState,
nsHTMLReflowMetrics aMetrics 
) [protected, virtual, inherited]

Definition at line 1229 of file nsBlockFrame.cpp.

{
  const nsMargin& borderPadding = aState.BorderPadding();
#ifdef NOISY_FINAL_SIZE
  ListTag(stdout);
  printf(": mY=%d mIsBottomMarginRoot=%s mPrevBottomMargin=%d bp=%d,%d\n",
         aState.mY, aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ? "yes" : "no",
         aState.mPrevBottomMargin,
         borderPadding.top, borderPadding.bottom);
#endif

  // XXXldb Handling min-width/max-width stuff after reflowing children
  // seems wrong.  But IIRC this function only does more than a little
  // bit in rare cases (or something like that, I'm not really sure).
  // What are those cases, and do we get the wrong behavior?

  // Compute final width
  nscoord maxElementWidth = 0;
#ifdef NOISY_KIDXMOST
  printf("%p aState.mKidXMost=%d\n", this, aState.mKidXMost); 
#endif
  if (!HaveAutoWidth(aReflowState)) {
    // Use style defined width
    aMetrics.width = borderPadding.left + aReflowState.mComputedWidth +
      borderPadding.right;

    if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
      if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Percent) {
        // for percentage widths, |HaveAutoWidth| is sometimes true and
        // sometimes false (XXXldb check that this is really true), and
        // we want the max-element-width to be the same either way
        // (i.e., whether it's an uncontsrained reflow or a fixed-width
        // reflow).  Thus, do the same thing we do below.
        maxElementWidth = aState.mMaxElementWidth +
          borderPadding.left + borderPadding.right;
      } else {
        // When style defines the width use it for the max-element-width
        // because we can't shrink any smaller.
        maxElementWidth = aMetrics.width;
      }
    }
  }
  else {
    nscoord computedWidth;

    // XXX Misleading comment:
    // There are two options here. We either shrink wrap around our
    // contents or we fluff out to the maximum block width. Note:
    // We always shrink wrap when given an unconstrained width.
    if ((0 == (NS_BLOCK_SHRINK_WRAP & mState)) &&
        !aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) &&
        !aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
      // XXX Misleading comment:
      // Set our width to the max width if we aren't already that
      // wide. Note that the max-width has nothing to do with our
      // contents (CSS2 section XXX)
      // XXXldb In what cases do we reach this code?
      computedWidth = borderPadding.left + aState.mContentArea.width +
        borderPadding.right;
    } else {
      computedWidth = aState.mKidXMost;
      if (NS_BLOCK_SPACE_MGR & mState) {
        // Include the space manager's state to properly account for the
        // extent of floated elements.
        nscoord xmost;
        if (aReflowState.mSpaceManager->XMost(xmost) &&
            computedWidth < xmost)
          computedWidth = xmost;
      }
      computedWidth += borderPadding.right;
    }

    if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
      // Add in border and padding dimensions to already computed
      // max-element-width values.
      maxElementWidth = aState.mMaxElementWidth +
        borderPadding.left + borderPadding.right;
    }

    // Apply min/max values
    computedWidth -= borderPadding.left + borderPadding.right;
    aReflowState.ApplyMinMaxConstraints(&computedWidth, nsnull);
    computedWidth += borderPadding.left + borderPadding.right;
    if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
      nscoord computedMinWidth = aReflowState.mComputedMinWidth +
        borderPadding.left + borderPadding.right;
      if (maxElementWidth < computedMinWidth &&
          GetStylePosition()->mMinWidth.GetUnit() != eStyleUnit_Percent) {
        maxElementWidth = computedMinWidth;
      }
    }
    aMetrics.width = computedWidth;

    // If we're shrink wrapping, then now that we know our final width we
    // need to do horizontal alignment of the inline lines and make sure
    // blocks are correctly sized and positioned. Any lines that need
    // final adjustment will have been marked as dirty
    if (aState.GetFlag(BRS_SHRINKWRAPWIDTH) && aState.GetFlag(BRS_NEEDRESIZEREFLOW)) {
      // If the closest block ancestor (and anything in between) is also
      // shrink wrap width, then we don't need to do this, because it
      // will reflow us after it calculates the final width
      PRBool rewrap = PR_TRUE;
      for (const nsHTMLReflowState *prs = aReflowState.parentReflowState;
           prs && prs->mComputedWidth == NS_SHRINKWRAPWIDTH;
           prs = prs->parentReflowState) {
        if (prs->frame->GetType() == nsLayoutAtoms::blockFrame ||
            prs->frame->GetType() == nsLayoutAtoms::areaFrame) {
          rewrap = PR_FALSE;
          break;
        }
      }
      if (rewrap) {
        // XXX Is this only used on things that are already NS_BLOCK_SPACE_MGR
        // and NS_BLOCK_MARGIN_ROOT?
        nsHTMLReflowState reflowState(aReflowState);

        reflowState.mComputedWidth = aMetrics.width - borderPadding.left -
                                     borderPadding.right;
        reflowState.reason = eReflowReason_Resize;
        reflowState.mSpaceManager->ClearRegions();

#ifdef DEBUG
        nscoord oldDesiredWidth = aMetrics.width;
#endif
        nsBlockReflowState state(reflowState, aState.mPresContext, this,
                                 aMetrics,
                                 aReflowState.mFlags.mHasClearance || (NS_BLOCK_MARGIN_ROOT & mState),
                                 (NS_BLOCK_MARGIN_ROOT & mState));
        // Don't try to pull up any new content from our next in flow. Shrinkwrapping
        // shouldn't make us shorter anyway.
        ReflowDirtyLines(state, PR_FALSE);
        aState.mY = state.mY;
        NS_ASSERTION(oldDesiredWidth == aMetrics.width, "bad desired width");
      }
    }
  }

  // Return bottom margin information
  // rbs says he hit this assertion occasionally (see bug 86947), so
  // just set the margin to zero and we'll figure out why later
  //NS_ASSERTION(aMetrics.mCarriedOutBottomMargin.IsZero(),
  //             "someone else set the margin");
  nscoord nonCarriedOutVerticalMargin = 0;
  if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
    // Apply rule from CSS 2.1 section 8.3.1. If we have some empty
    // line with clearance and a non-zero top margin and all
    // subsequent lines are empty, then we do not allow our childrens'
    // carried out bottom margin to be carried out of us and collapse
    // with our own bottom margin.
    if (CheckForCollapsedBottomMarginFromClearanceLine()) {
      // Convert the children's carried out margin to something that
      // we will include in our height
      nonCarriedOutVerticalMargin = aState.mPrevBottomMargin.get();
      aState.mPrevBottomMargin.Zero();
    }
    aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
  } else {
    aMetrics.mCarriedOutBottomMargin.Zero();
  }

  // Compute final height
  if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
    if (NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
      // Figure out how much of the computed height should be
      // applied to this frame.
      nscoord computedHeightLeftOver = aReflowState.mComputedHeight;
      if (mPrevInFlow) {
        // Reduce the height by the computed height of prev-in-flows.
        for (nsIFrame* prev = mPrevInFlow; prev; prev = prev->GetPrevInFlow()) {
          nscoord contentHeight = prev->GetRect().height;
          if (prev == mPrevInFlow) {
            // subtract off the style top borderpadding to get the
            // content height
            contentHeight -= aReflowState.mComputedBorderPadding.top;
          }
          computedHeightLeftOver -= contentHeight;
        }
        // We may have stretched the frame beyond its computed height. Oh well.
        computedHeightLeftOver = PR_MAX(0, computedHeightLeftOver);
      }

      aMetrics.height = borderPadding.top + computedHeightLeftOver + borderPadding.bottom;
      if (computedHeightLeftOver > 0 &&
          aMetrics.height > aReflowState.availableHeight) {
        // We don't fit and we consumed some of the computed height,
        // so we should consume all the available height and then
        // break.  If our bottom border/padding straddles the break
        // point, then this will increase our height and push the
        // border/padding to the next page/column.
        aMetrics.height = aReflowState.availableHeight;
        aState.mReflowStatus |= NS_FRAME_NOT_COMPLETE;
      }
    }
    else {
      // Use the current height; continuations will take up the rest.
      // Do extend the height to at least consume the available
      // height, otherwise our left/right borders (for example) won't
      // extend all the way to the break.
      aMetrics.height = PR_MAX(aReflowState.availableHeight,
                               aState.mY + nonCarriedOutVerticalMargin);
    }

    // Don't carry out a bottom margin when our height is fixed.
    aMetrics.mCarriedOutBottomMargin.Zero();
  }
  else {
    nscoord autoHeight = aState.mY + nonCarriedOutVerticalMargin;

    // Shrink wrap our height around our contents.
    if (aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
      // When we are a bottom-margin root make sure that our last
      // childs bottom margin is fully applied.
      // Apply the margin only if there's space for it.
      if (autoHeight < aState.mReflowState.availableHeight)
      {
        // Truncate bottom margin if it doesn't fit to our available height.
        autoHeight = PR_MIN(autoHeight + aState.mPrevBottomMargin.get(), aState.mReflowState.availableHeight);
      }
    }

    if (NS_BLOCK_SPACE_MGR & mState) {
      // Include the space manager's state to properly account for the
      // bottom margin of any floated elements; e.g., inside a table cell.
      nscoord ymost;
      if (aReflowState.mSpaceManager->YMost(ymost) &&
          autoHeight < ymost)
        autoHeight = ymost;
    }

    // Apply min/max values
    autoHeight -= borderPadding.top;
    nscoord oldAutoHeight = autoHeight;
    aReflowState.ApplyMinMaxConstraints(nsnull, &autoHeight);
    if (autoHeight != oldAutoHeight) {
      // Our min-height or max-height made our height change.  Don't carry out
      // our kids' bottom margins.
      aMetrics.mCarriedOutBottomMargin.Zero();
    }
    autoHeight += borderPadding.top + borderPadding.bottom;
    aMetrics.height = autoHeight;
  }

  aMetrics.ascent = mAscent;
  aMetrics.descent = aMetrics.height - aMetrics.ascent;

  if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
    // Store away the final value
    aMetrics.mMaxElementWidth = maxElementWidth;
#ifdef DEBUG
    if (gNoisyMaxElementWidth) {
      IndentBy(stdout, gNoiseIndent);
      printf ("nsBlockFrame::CFS: %p returning MEW %d\n", 
              NS_STATIC_CAST(void*, this), aMetrics.mMaxElementWidth);
    }
#endif
  }

#ifdef DEBUG_blocks
  if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
    ListTag(stdout);
    printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
  }
  if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH) &&
      (maxElementWidth > aMetrics.width))) {
    ListTag(stdout);
    printf(": WARNING: max-element-width:%d desired:%d,%d maxSize:%d,%d\n",
           maxElementWidth, aMetrics.width, aMetrics.height,
           aState.mReflowState.availableWidth,
           aState.mReflowState.availableHeight);
  }
#endif
#ifdef DEBUG
  if (gNoisyMaxElementWidth) {
    if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
      IndentBy(stdout, gNoiseIndent);
      if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
        printf("PASS1 ");
      }
      ListTag(stdout);
      printf(": max-element-width:%d desired:%d,%d maxSize:%d,%d\n",
             maxElementWidth, aMetrics.width, aMetrics.height,
             aState.mReflowState.availableWidth,
             aState.mReflowState.availableHeight);
    }
  }
#endif

  // If we're requested to update our maximum width, then compute it
  if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
    if (!HaveAutoWidth(aReflowState) &&
        aReflowState.mStylePosition->mWidth.GetUnit() != eStyleUnit_Percent) {
      aMetrics.mMaximumWidth = aMetrics.width;
    } else {
      // We need to add in for the right border/padding
      // The maximum width in the reflow state includes the left
      // border/padding but not the right.
      aMetrics.mMaximumWidth = aState.mMaximumWidth + borderPadding.right;
    }
#ifdef NOISY_MAXIMUM_WIDTH
    printf("nsBlockFrame::ComputeFinalSize block %p setting aMetrics.mMaximumWidth to %d\n", this, aMetrics.mMaximumWidth);
#endif
  }

  ComputeCombinedArea(aReflowState, aMetrics);
}

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nsresult nsBlockFrame::CreateContinuationFor ( nsBlockReflowState aState,
nsLineBox aLine,
nsIFrame aFrame,
PRBool aMadeNewFrame 
) [protected, virtual, inherited]

Create a continuation, if necessary, for aFrame.

Place it in aLine if aLine is not null. Set aMadeNewFrame to PR_TRUE if a new frame is created.

Definition at line 4255 of file nsBlockFrame.cpp.

{
  aMadeNewFrame = PR_FALSE;
  nsresult rv;
  nsIFrame* nextInFlow;
  rv = CreateNextInFlow(aState.mPresContext, this, aFrame, nextInFlow);
  if (NS_FAILED(rv)) {
    return rv;
  }
  if (nsnull != nextInFlow) {
    aMadeNewFrame = PR_TRUE;
    if (aLine) { 
      aLine->SetChildCount(aLine->GetChildCount() + 1);
    }
  }
#ifdef DEBUG
  VerifyLines(PR_FALSE);
#endif
  return rv;
}

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void nsBlockFrame::DeleteLine ( nsBlockReflowState aState,
nsLineList::iterator  aLine,
nsLineList::iterator  aLineEnd 
) [protected, inherited]

Definition at line 2587 of file nsBlockFrame.cpp.

{
  NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
  if (0 == aLine->GetChildCount()) {
    NS_ASSERTION(aState.mCurrentLine == aLine,
                 "using function more generally than designed, "
                 "but perhaps OK now");
    nsLineBox *line = aLine;
    aLine = mLines.erase(aLine);
    aState.FreeLineBox(line);
    // Mark the previous margin of the next line dirty since we need to
    // recompute its top position.
    if (aLine != aLineEnd)
      aLine->MarkPreviousMarginDirty();
  }
}

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void nsBlockFrame::DeleteNextInFlowChild ( nsPresContext aPresContext,
nsIFrame aNextInFlow 
) [virtual, inherited]

Definition at line 5914 of file nsBlockFrame.cpp.

{
  nsIFrame* prevInFlow = aNextInFlow->GetPrevInFlow();
  NS_PRECONDITION(prevInFlow, "bad next-in-flow");
  NS_PRECONDITION(IsChild(aNextInFlow), "bad geometric parent");

#ifdef IBMBIDI
  if (!(prevInFlow->GetStateBits() & NS_FRAME_IS_BIDI) ||
      (NS_STATIC_CAST(nsIFrame*,
                      aPresContext->PropertyTable()->GetProperty(prevInFlow, nsLayoutAtoms::nextBidi)) !=
       aNextInFlow))
#endif // IBMBIDI
    DoRemoveFrame(aNextInFlow);
}

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NS_IMETHODIMP nsBlockFrame::Destroy ( nsPresContext aPresContext) [inherited]

Reimplemented in nsComboboxControlFrame, nsFileControlFrame, and nsLegendFrame.

Definition at line 292 of file nsBlockFrame.cpp.

{
  mAbsoluteContainer.DestroyFrames(this, aPresContext);
  // Outside bullets are not in our child-list so check for them here
  // and delete them when present.
  if (mBullet && HaveOutsideBullet()) {
    mBullet->Destroy(aPresContext);
    mBullet = nsnull;
  }

  mFloats.DestroyFrames(aPresContext);

  nsLineBox::DeleteLineList(aPresContext, mLines);

  // destroy overflow lines now
  nsLineList* overflowLines = RemoveOverflowLines();
  if (overflowLines) {
    nsLineBox::DeleteLineList(aPresContext, *overflowLines);
  }

  {
    nsAutoOOFFrameList oofs(this);
    oofs.mList.DestroyFrames(aPresContext);
    // oofs is now empty and will remove the frame list property
  }

  return nsBlockFrameSuper::Destroy(aPresContext);
}

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nsresult nsBlockFrame::DoReflowInlineFrames ( nsBlockReflowState aState,
nsLineLayout aLineLayout,
line_iterator  aLine,
PRBool aKeepReflowGoing,
PRUint8 aLineReflowStatus,
PRBool  aUpdateMaximumWidth,
PRBool  aDamageDirtyArea,
PRBool  aAllowPullUp 
) [protected, inherited]

Definition at line 3827 of file nsBlockFrame.cpp.

{
  // Forget all of the floats on the line
  aLine->FreeFloats(aState.mFloatCacheFreeList);
  aState.mFloatCombinedArea.SetRect(0, 0, 0, 0);

  // Setup initial coordinate system for reflowing the inline frames
  // into. Apply a previous block frame's bottom margin first.
  if (ShouldApplyTopMargin(aState, aLine)) {
    aState.mY += aState.mPrevBottomMargin.get();
  }
  aState.GetAvailableSpace();
  PRBool impactedByFloats = aState.IsImpactedByFloat() ? PR_TRUE : PR_FALSE;
  aLine->SetLineIsImpactedByFloat(impactedByFloats);
#ifdef REALLY_NOISY_REFLOW
  printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
         this, impactedByFloats);
#endif

  const nsMargin& borderPadding = aState.BorderPadding();
  nscoord x = aState.mAvailSpaceRect.x + borderPadding.left;
  nscoord availWidth = aState.mAvailSpaceRect.width;
  nscoord availHeight;
  if (aState.GetFlag(BRS_UNCONSTRAINEDHEIGHT)) {
    availHeight = NS_UNCONSTRAINEDSIZE;
  }
  else {
    /* XXX get the height right! */
    availHeight = aState.mAvailSpaceRect.height;
  }
  if (aUpdateMaximumWidth) {
    availWidth = NS_UNCONSTRAINEDSIZE;
  }
  aLineLayout.BeginLineReflow(x, aState.mY,
                              availWidth, availHeight,
                              impactedByFloats,
                              PR_FALSE /*XXX isTopOfPage*/);

  // XXX Unfortunately we need to know this before reflowing the first
  // inline frame in the line. FIX ME.
  if ((0 == aLineLayout.GetLineNumber()) &&
      (NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
    aLineLayout.SetFirstLetterStyleOK(PR_TRUE);
  }

  // keep track of the last overflow float in case we need to undo any new additions
  nsIFrame* lastPlaceholder = aState.mOverflowPlaceholders.LastChild();

  // Reflow the frames that are already on the line first
  nsresult rv = NS_OK;
  PRUint8 lineReflowStatus = LINE_REFLOW_OK;
  PRInt32 i;
  nsIFrame* frame = aLine->mFirstChild;
  aLine->SetHasPercentageChild(PR_FALSE); // To be set by ReflowInlineFrame below
  // Determine whether this is a line of placeholders for out-of-flow
  // continuations
  PRBool isContinuingPlaceholders = PR_FALSE;

  // need to repeatedly call GetChildCount here, because the child
  // count can change during the loop!
  for (i = 0; i < aLine->GetChildCount(); i++) {
    if (IsContinuationPlaceholder(frame)) {
      isContinuingPlaceholders = PR_TRUE;
    }
    rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
                           &lineReflowStatus);
    if (NS_FAILED(rv)) {
      return rv;
    }
    if (LINE_REFLOW_OK != lineReflowStatus) {
      // It is possible that one or more of next lines are empty
      // (because of DeleteNextInFlowChild). If so, delete them now
      // in case we are finished.
      ++aLine;
      while ((aLine != end_lines()) && (0 == aLine->GetChildCount())) {
        // XXX Is this still necessary now that DeleteNextInFlowChild
        // uses DoRemoveFrame?
        nsLineBox *toremove = aLine;
        aLine = mLines.erase(aLine);
        NS_ASSERTION(nsnull == toremove->mFirstChild, "bad empty line");
        aState.FreeLineBox(toremove);
      }
      --aLine;

      if (LINE_REFLOW_TRUNCATED == lineReflowStatus) {
        // Don't push any lines if we just want to calculate the maximum width
        if (!aUpdateMaximumWidth) {
          // Push the line with the truncated float 
          PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
        }
      }
      break;
    }
    frame = frame->GetNextSibling();
  }

  // Don't pull up new frames into lines with continuation placeholders
  if (!isContinuingPlaceholders && aAllowPullUp) {
    // Pull frames and reflow them until we can't
    while (LINE_REFLOW_OK == lineReflowStatus) {
      rv = PullFrame(aState, aLine, aDamageDirtyArea, frame);
      if (NS_FAILED(rv)) {
        return rv;
      }
      if (nsnull == frame) {
        break;
      }

      while (LINE_REFLOW_OK == lineReflowStatus) {
        PRInt32 oldCount = aLine->GetChildCount();
        rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
                               &lineReflowStatus);
        if (NS_FAILED(rv)) {
          return rv;
        }
        if (aLine->GetChildCount() != oldCount) {
          // We just created a continuation for aFrame AND its going
          // to end up on this line (e.g. :first-letter
          // situation). Therefore we have to loop here before trying
          // to pull another frame.
          frame = frame->GetNextSibling();
        }
        else {
          break;
        }
      }
    }
  } 

  if (LINE_REFLOW_REDO == lineReflowStatus) {
    // This happens only when we have a line that is impacted by
    // floats and the first element in the line doesn't fit with
    // the floats.
    //
    // What we do is to advance past the first float we find and
    // then reflow the line all over again.
    NS_ASSERTION(aState.IsImpactedByFloat(),
                 "redo line on totally empty line");
    NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
                 "unconstrained height on totally empty line");


    if (aState.mAvailSpaceRect.height > 0) {
      aState.mY += aState.mAvailSpaceRect.height;
    } else {
      NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableHeight,
                   "We shouldn't be running out of height here");
      if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableHeight) {
        // just move it down a bit to try to get out of this mess
        aState.mY += 1;
      } else {
        // There's nowhere to retry placing the line. Just treat it as if
        // we placed the float but it was truncated so we need this line
        // to go to the next page/column.
        lineReflowStatus = LINE_REFLOW_TRUNCATED;
        // Don't push any lines if we just want to calculate the maximum width
        if (!aUpdateMaximumWidth) {
          // Push the line that didn't fit
          PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
        }
      }
    }
      
    // We don't want to advance by the bottom margin anymore (we did it
    // once at the beginning of this function, which will just be called
    // again), and we certainly don't want to go back if it's negative
    // (infinite loop, bug 153429).
    aState.mPrevBottomMargin.Zero();

    // XXX: a small optimization can be done here when paginating:
    // if the new Y coordinate is past the end of the block then
    // push the line and return now instead of later on after we are
    // past the float.
  }
  else if (LINE_REFLOW_TRUNCATED != lineReflowStatus) {
    // If we are propagating out a break-before status then there is
    // no point in placing the line.
    if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
      if (PlaceLine(aState, aLineLayout, aLine, aKeepReflowGoing, aUpdateMaximumWidth)) {
        UndoSplitPlaceholders(aState, lastPlaceholder); // undo since we pushed the current line
      }
    }
  }
  *aLineReflowStatus = lineReflowStatus;

  return rv;
}

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nsresult nsBlockFrame::DoRemoveFrame ( nsIFrame aDeletedFrame,
PRBool  aDestroyFrames = PR_TRUE 
) [inherited]

does all the real work for removing aDeletedFrame from this finds the line containing aFrame.

handled continued frames marks lines dirty as needed

Parameters:
aDestroyFramesif false then we don't actually destroy the frame or its next in flows, we just remove them. This does NOT work on out of flow frames so always use PR_TRUE for out of flows.

Definition at line 5692 of file nsBlockFrame.cpp.

{
  // Clear our line cursor, since our lines may change.
  ClearLineCursor();
        
  if (aDeletedFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
    NS_ASSERTION(aDestroyFrames, "We can't not destroy out of flows");
    DoRemoveOutOfFlowFrame(aDeletedFrame);
    return NS_OK;
  }
  
  nsPresContext* presContext = GetPresContext();
  nsIPresShell* presShell = presContext->PresShell();

  PRBool isPlaceholder = nsLayoutAtoms::placeholderFrame == aDeletedFrame->GetType();
  if (isPlaceholder) {
    nsFrameList* overflowPlaceholders = GetOverflowPlaceholders();
    if (overflowPlaceholders && overflowPlaceholders->RemoveFrame(aDeletedFrame)) {
      nsIFrame* nif = aDeletedFrame->GetNextInFlow();
      if (aDestroyFrames) {
        aDeletedFrame->Destroy(presContext);
      } else {
        aDeletedFrame->SetNextSibling(nsnull);
      }
      return RemoveBlockChild(nif, aDestroyFrames);
    }
  }
  
  // Find the line and the previous sibling that contains
  // deletedFrame; we also find the pointer to the line.
  nsLineList::iterator line = mLines.begin(),
                       line_end = mLines.end();
  PRBool searchingOverflowList = PR_FALSE;
  nsIFrame* prevSibling = nsnull;
  // Make sure we look in the overflow lines even if the normal line
  // list is empty
  TryAllLines(&line, &line_end, &searchingOverflowList);
  while (line != line_end) {
    nsIFrame* frame = line->mFirstChild;
    PRInt32 n = line->GetChildCount();
    while (--n >= 0) {
      if (frame == aDeletedFrame) {
        goto found_frame;
      }
      prevSibling = frame;
      frame = frame->GetNextSibling();
    }
    ++line;
    TryAllLines(&line, &line_end, &searchingOverflowList);
  }
found_frame:;
  if (line == line_end) {
    NS_ERROR("can't find deleted frame in lines");
    return NS_ERROR_FAILURE;
  }

  if (prevSibling && !prevSibling->GetNextSibling()) {
    // We must have found the first frame in the overflow line list. So
    // there is no prevSibling
    prevSibling = nsnull;
  }
  NS_ASSERTION(!prevSibling || prevSibling->GetNextSibling() == aDeletedFrame, "bad prevSibling");

  while ((line != line_end) && (nsnull != aDeletedFrame)) {
    NS_ASSERTION(this == aDeletedFrame->GetParent(), "messed up delete code");
    NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");

    // If the frame being deleted is the last one on the line then
    // optimize away the line->Contains(next-in-flow) call below.
    PRBool isLastFrameOnLine = (1 == line->GetChildCount() ||
                                line->LastChild() == aDeletedFrame);

    // Remove aDeletedFrame from the line
    nsIFrame* nextFrame = aDeletedFrame->GetNextSibling();
    if (line->mFirstChild == aDeletedFrame) {
      // We should be setting this to null if aDeletedFrame
      // is the only frame on the line. HOWEVER in that case
      // we will be removing the line anyway, see below.
      line->mFirstChild = nextFrame;
    }

    // Hmm, this won't do anything if we're removing a frame in the first
    // overflow line... Hopefully doesn't matter
    --line;
    if (line != line_end && !line->IsBlock()) {
      // Since we just removed a frame that follows some inline
      // frames, we need to reflow the previous line.
      line->MarkDirty();
    }
    ++line;

    // Take aDeletedFrame out of the sibling list. Note that
    // prevSibling will only be nsnull when we are deleting the very
    // first frame in the main or overflow list.
    if (prevSibling) {
      prevSibling->SetNextSibling(nextFrame);
    }

    // Update the child count of the line to be accurate
    PRInt32 lineChildCount = line->GetChildCount();
    lineChildCount--;
    line->SetChildCount(lineChildCount);

    // Destroy frame; capture its next-in-flow first in case we need
    // to destroy that too.
    nsIFrame* deletedNextInFlow = aDeletedFrame->GetNextInFlow();
#ifdef NOISY_REMOVE_FRAME
    printf("DoRemoveFrame: %s line=%p frame=",
           searchingOverflowList?"overflow":"normal", line.get());
    nsFrame::ListTag(stdout, aDeletedFrame);
    printf(" prevSibling=%p deletedNextInFlow=%p\n", prevSibling, deletedNextInFlow);
#endif

    if (aDestroyFrames) {
      aDeletedFrame->Destroy(presContext);
    } else {
      aDeletedFrame->SetNextSibling(nsnull);
    }
    aDeletedFrame = deletedNextInFlow;

    PRBool haveAdvancedToNextLine = PR_FALSE;
    // If line is empty, remove it now.
    if (0 == lineChildCount) {
#ifdef NOISY_REMOVE_FRAME
        printf("DoRemoveFrame: %s line=%p became empty so it will be removed\n",
               searchingOverflowList?"overflow":"normal", line.get());
#endif
      nsLineBox *cur = line;
      if (!searchingOverflowList) {
        line = mLines.erase(line);
        // Invalidate the space taken up by the line.
        // XXX We need to do this if we're removing a frame as a result of
        // a call to RemoveFrame(), but we may not need to do this in all
        // cases...
        nsRect lineCombinedArea(cur->GetCombinedArea());
#ifdef NOISY_BLOCK_INVALIDATE
        printf("%p invalidate 10 (%d, %d, %d, %d)\n",
               this, lineCombinedArea.x, lineCombinedArea.y,
               lineCombinedArea.width, lineCombinedArea.height);
#endif
        Invalidate(lineCombinedArea);
      } else {
        nsLineList* lineList = RemoveOverflowLines();
        line = lineList->erase(line);
        if (!lineList->empty()) {
          SetOverflowLines(lineList);
        }
      }
      cur->Destroy(presShell);

      // If we're removing a line, ReflowDirtyLines isn't going to
      // know that it needs to slide lines unless something is marked
      // dirty.  So mark the previous margin of the next line dirty if
      // there is one.
      if (line != line_end) {
        line->MarkPreviousMarginDirty();
      }
      haveAdvancedToNextLine = PR_TRUE;
    } else {
      // Make the line that just lost a frame dirty, and advance to
      // the next line.
      if (!deletedNextInFlow || isLastFrameOnLine ||
          !line->Contains(deletedNextInFlow)) {
        line->MarkDirty();
        ++line;
        haveAdvancedToNextLine = PR_TRUE;
      }
    }

    if (deletedNextInFlow) {
      // Continuations for placeholder frames don't always appear in
      // consecutive lines. So for placeholders, just continue the slow easy way.
      if (isPlaceholder) {
        return RemoveBlockChild(deletedNextInFlow, aDestroyFrames);
      }

      // See if we should keep looking in the current flow's line list.
      if (deletedNextInFlow->GetParent() != this) {
        // The deceased frames continuation is not a child of the
        // current block. So break out of the loop so that we advance
        // to the next parent.
        break;
      }

      // If we advanced to the next line then check if we should switch to the
      // overflow line list.
      if (haveAdvancedToNextLine) {
        if (line != line_end && !searchingOverflowList &&
            !line->Contains(deletedNextInFlow)) {
          // We have advanced to the next *normal* line but the next-in-flow
          // is not there - force a switch to the overflow line list.
          line = line_end;
        }

        PRBool wasSearchingOverflowList = searchingOverflowList;
        TryAllLines(&line, &line_end, &searchingOverflowList);
        if (NS_UNLIKELY(searchingOverflowList && !wasSearchingOverflowList &&
                        prevSibling)) {
          // We switched to the overflow line list and we have a prev sibling
          // (in the main list), in this case we don't want to pick up any
          // sibling list from the deceased frames (bug 344557).
          prevSibling->SetNextSibling(nsnull);
          prevSibling = nsnull;
        }
#ifdef NOISY_REMOVE_FRAME
        printf("DoRemoveFrame: now on %s line=%p prevSibling=%p\n",
               searchingOverflowList?"overflow":"normal", line.get(),
               prevSibling);
#endif
      }
    }
  }

#ifdef DEBUG
  VerifyLines(PR_TRUE);
#endif

  // Advance to next flow block if the frame has more continuations
  return RemoveBlockChild(aDeletedFrame, aDestroyFrames);
}

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void nsBlockFrame::DoRemoveOutOfFlowFrame ( nsIFrame aFrame) [static, protected, inherited]

Definition at line 5627 of file nsBlockFrame.cpp.

{
  // First remove aFrame's next in flow
  nsIFrame* nextInFlow = aFrame->GetNextInFlow();
  if (nextInFlow) {
    nsBlockFrame::DoRemoveOutOfFlowFrame(nextInFlow);
  }
  // Now remove aFrame
  const nsStyleDisplay* display = aFrame->GetStyleDisplay();

  // The containing block is always the parent of aFrame.
  nsBlockFrame* block = (nsBlockFrame*)aFrame->GetParent();
  // Remove aFrame from the appropriate list. 
  if (display->IsAbsolutelyPositioned()) {
    block->mAbsoluteContainer.RemoveFrame(block,
                                          block->mAbsoluteContainer.GetChildListName(),
                                          aFrame);
    aFrame->Destroy(aFrame->GetPresContext());
  }
  else {
    // This also destroys the frame.
    block->RemoveFloat(aFrame);
  }
}

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PRBool nsBlockFrame::DrainOverflowLines ( nsBlockReflowState aState) [protected, inherited]

grab overflow lines from this block's prevInFlow, and make them part of this block's mLines list.

Returns:
PR_TRUE if any lines were drained.

Definition at line 4912 of file nsBlockFrame.cpp.

{
#ifdef DEBUG
  VerifyOverflowSituation();
#endif
  nsLineList* overflowLines = nsnull;
  nsLineList* ourOverflowLines = nsnull;

  // First grab the prev-in-flows overflow lines
  nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
  if (prevBlock) {
    overflowLines = prevBlock->RemoveOverflowLines();
    if (overflowLines) {
      NS_ASSERTION(! overflowLines->empty(),
                   "overflow lines should never be set and empty");
      // Make all the frames on the overflow line list mine
      nsIFrame* frame = overflowLines->front()->mFirstChild;
      while (nsnull != frame) {
        ReparentFrame(frame, prevBlock, this);

        // Get the next frame
        frame = frame->GetNextSibling();
      }

      // make the overflow out-of-flow frames mine too
      nsAutoOOFFrameList oofs(prevBlock);
      if (oofs.mList.NotEmpty()) {
        for (nsIFrame* f = oofs.mList.FirstChild(); f; f = f->GetNextSibling()) {
          ReparentFrame(f, prevBlock, this);
        }
        mFloats.InsertFrames(nsnull, nsnull, oofs.mList.FirstChild());
        oofs.mList.SetFrames(nsnull);
      }
    }
    
    // The lines on the overflow list have already been marked dirty and their
    // previous margins marked dirty also.
  }

  // Don't need to reparent frames in our own overflow lines/oofs, because they're
  // already ours. But we should put overflow floats back in mFloats.
  ourOverflowLines = RemoveOverflowLines();
  if (ourOverflowLines) {
    nsAutoOOFFrameList oofs(this);
    if (oofs.mList.NotEmpty()) {
      // The overflow floats go after our regular floats
      mFloats.AppendFrames(nsnull, oofs.mList.FirstChild());
      oofs.mList.SetFrames(nsnull);
    }
  }

  if (!overflowLines && !ourOverflowLines) {
    // nothing to do; always the case for non-constrained-height reflows
    return PR_FALSE;
  }

  NS_ASSERTION(aState.mOverflowPlaceholders.IsEmpty(),
               "Should have no overflow placeholders yet");

  // HANDLING CONTINUATION PLACEHOLDERS (floats only at the moment, because
  // abs-pos frames don't have continuations)
  //
  // All continuation placeholders need to be moved to the front of
  // our line list. We also need to maintain the invariant that at
  // most one frame for a given piece of content is in our normal
  // child list, by pushing all but the first placeholder to our
  // overflow placeholders list.
  // 
  // One problem we have to deal with is that some of these
  // continuation placeholders may have been donated to us by a
  // descendant block that was complete. We need to push them down to
  // a lower block if possible.
  //
  // We keep the lists ordered so that prev in flows come before their
  // next in flows. We do not worry about properly ordering the
  // placeholders for different content relative to each other until
  // the end. Then we sort them.
  //
  // When we're shuffling placeholders we also need to shuffle their out of
  // flows to match. As we put placeholders into keepPlaceholders, we unhook
  // their floats from mFloats. Later we put the floats back based on the
  // order of the placeholders.
  nsIFrame* lastOP = nsnull;
  nsFrameList keepPlaceholders;
  nsFrameList keepOutOfFlows;
  nsIFrame* lastKP = nsnull;
  nsIFrame* lastKOOF = nsnull;
  nsLineList* lineLists[3] = { overflowLines, &mLines, ourOverflowLines };
  static const PRPackedBool searchFirstLinesOnly[3] = { PR_FALSE, PR_TRUE, PR_FALSE };
  for (PRInt32 i = 0; i < 3; ++i) {
    nsLineList* ll = lineLists[i];
    if (ll && !ll->empty()) {
      line_iterator iter = ll->begin();
      line_iterator iter_end = ll->end();
      nsIFrame* lastFrame = nsnull;
      while (iter != iter_end) {
        PRUint32 n = iter->GetChildCount();
        if (n == 0 || !IsContinuationPlaceholder(iter->mFirstChild)) {
          if (lastFrame) {
            lastFrame->SetNextSibling(iter->mFirstChild);
          }
          if (searchFirstLinesOnly[i]) {
            break;
          }
          lastFrame = iter->LastChild();
          ++iter;
        } else {
          nsLineBox* line = iter;
          iter = ll->erase(iter);
          nsIFrame* next;
          for (nsPlaceholderFrame* f = NS_STATIC_CAST(nsPlaceholderFrame*, line->mFirstChild);
               n > 0; --n, f = NS_STATIC_CAST(nsPlaceholderFrame*, next)) {
            NS_ASSERTION(IsContinuationPlaceholder(f),
                         "Line frames should all be continuation placeholders");
            next = f->GetNextSibling();
            nsIFrame* fpif = f->GetPrevInFlow();
            nsIFrame* oof = f->GetOutOfFlowFrame();
            
            // Take this out of mFloats for now. We may put it back later in
            // this function
#ifdef DEBUG
            PRBool found =
#endif
              mFloats.RemoveFrame(oof);
            NS_ASSERTION(found, "Float should have been put in our mFloats list");

            PRBool isAncestor = nsLayoutUtils::IsProperAncestorFrame(this, fpif);
            if (isAncestor) {
              // oops. we already have a prev-in-flow for this
              // placeholder. We have to move this frame out of here. We
              // can put it in our overflow placeholders.
              aState.mOverflowPlaceholders.InsertFrame(nsnull, lastOP, f);
              // Let oof dangle for now, because placeholders in
              // mOverflowPlaceholders do not keep their floats in any child list
              lastOP = f;
            } else {
              if (fpif->GetParent() == prevBlock) {
                keepPlaceholders.InsertFrame(nsnull, lastKP, f);
                keepOutOfFlows.InsertFrame(nsnull, lastKOOF, oof);
                lastKP = f;
                lastKOOF = oof;
              } else {
                // Ok, now we're in the tough situation where some child
                // of prevBlock was complete and pushed its overflow
                // placeholders up to prevBlock's overflow. We might be
                // able to find a more appropriate parent for f somewhere
                // down in our descendants.
                NS_ASSERTION(nsLayoutUtils::IsProperAncestorFrame(prevBlock, fpif),
                             "bad prev-in-flow ancestor chain");
                // Find the first ancestor of f's prev-in-flow that has a next in flow
                // that can contain the float.
                // That next in flow should become f's parent.
                nsIFrame* fpAncestor;
                for (fpAncestor = fpif->GetParent();
                     !fpAncestor->GetNextInFlow() || !fpAncestor->IsFloatContainingBlock();
                     fpAncestor = fpAncestor->GetParent())
                  ;
                if (fpAncestor == prevBlock) {
                  // We're still the best parent.
                  keepPlaceholders.InsertFrame(nsnull, lastKP, f);
                  keepOutOfFlows.InsertFrame(nsnull, lastKOOF, oof);
                  lastKP = f;
                  lastKOOF = oof;
                } else {
                  // Just put it at the front of
                  // fpAncestor->GetNextInFlow()'s lines.
                  nsLineBox* newLine = aState.NewLineBox(f, 1, PR_FALSE);
                  if (newLine) {
                    nsBlockFrame* target =
                      NS_STATIC_CAST(nsBlockFrame*, fpAncestor->GetNextInFlow());
                    if (!target->mLines.empty()) {
                      f->SetNextSibling(target->mLines.front()->mFirstChild);
                    } else {
                      f->SetNextSibling(nsnull);
                    }
                    target->mLines.push_front(newLine);
                    ReparentFrame(f, this, target);

                    target->mFloats.InsertFrame(nsnull, nsnull, oof);
                    ReparentFrame(oof, this, target);
                  }
                }
              }
            }
          }
          aState.FreeLineBox(line);
        }
      }
      if (lastFrame) {
        lastFrame->SetNextSibling(nsnull);
      }
    }
  }

  // Now join the line lists into mLines
  if (overflowLines) {
    if (!overflowLines->empty()) {
      // Join the line lists
      if (! mLines.empty()) 
        {
          // Remember to recompute the margins on the first line. This will
          // also recompute the correct deltaY if necessary.
          mLines.front()->MarkPreviousMarginDirty();
          // Join the sibling lists together
          nsIFrame* lastFrame = overflowLines->back()->LastChild();
          lastFrame->SetNextSibling(mLines.front()->mFirstChild);
        }
      // Place overflow lines at the front of our line list
      mLines.splice(mLines.begin(), *overflowLines);
      NS_ASSERTION(overflowLines->empty(), "splice should empty list");
    }
    delete overflowLines;
  }
  if (ourOverflowLines) {
    if (!ourOverflowLines->empty()) {
      if (!mLines.empty()) {
        mLines.back()->LastChild()->
          SetNextSibling(ourOverflowLines->front()->mFirstChild);
      }
      // append the overflow to mLines
      mLines.splice(mLines.end(), *ourOverflowLines);
    }
    delete ourOverflowLines;
  }

  // store the placeholders that we're keeping in our frame list
  if (keepPlaceholders.NotEmpty()) {
    keepPlaceholders.SortByContentOrder();
    nsLineBox* newLine = aState.NewLineBox(keepPlaceholders.FirstChild(),
                                           keepPlaceholders.GetLength(), PR_FALSE);
    if (newLine) {
      if (!mLines.empty()) {
        keepPlaceholders.LastChild()->SetNextSibling(mLines.front()->mFirstChild);
      }
      mLines.push_front(newLine);
    }

    // Put the placeholders' out of flows into the float list
    keepOutOfFlows.SortByContentOrder();
    mFloats.InsertFrames(nsnull, nsnull, keepOutOfFlows.FirstChild());
  }

  return PR_TRUE;
}

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line_iterator nsBlockFrame::end_lines ( ) [inline, inherited]

Definition at line 126 of file nsBlockFrame.h.

{ return mLines.end(); }

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const_line_iterator nsBlockFrame::end_lines ( ) const [inline, inherited]

Definition at line 128 of file nsBlockFrame.h.

{ return mLines.end(); }

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Definition at line 1967 of file nsBlockFrame.cpp.

{
  // This assertion actually fires on lots of pages (e.g., bugzilla,
  // bugzilla query page), so limit it to a few people until we fix the
  // problem causing it.  It's related to the similarly |#ifdef|ed
  // assertion in |PrepareChildIncrementalReflow|.
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
  NS_PRECONDITION(aFrame, "why pass a null frame?");
#endif

  line_iterator line = begin_lines(),
                line_end = end_lines();
  for ( ; line != line_end; ++line) {
    // If the target frame is in-flow, and this line contains the it,
    // then we've found our line.
    if (line->Contains(aFrame))
      return line;

    // If the target frame is floated, and this line contains the
    // float's placeholder, then we've found our line.
    if (line->HasFloats()) {
      for (nsFloatCache *fc = line->GetFirstFloat();
           fc != nsnull;
           fc = fc->Next()) {
        if (aFrame == fc->mPlaceholder->GetOutOfFlowFrame())
          return line;
      }
    }
  }

  return line_end;
}

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PRBool nsBlockFrame::FrameStartsCounterScope ( nsIFrame aFrame) [static, protected, inherited]

Definition at line 7340 of file nsBlockFrame.cpp.

{
  nsIContent* content = aFrame->GetContent();
  if (!content || !content->IsContentOfType(nsIContent::eHTML))
    return PR_FALSE;
  nsINodeInfo *ni = content->GetNodeInfo();
  return ni->Equals(nsHTMLAtoms::ol) ||
         ni->Equals(nsHTMLAtoms::ul) ||
         ni->Equals(nsHTMLAtoms::dir) ||
         ni->Equals(nsHTMLAtoms::menu);
}

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nsIAtom * nsBlockFrame::GetAdditionalChildListName ( PRInt32  aIndex) const [virtual, inherited]

Reimplemented in nsComboboxControlFrame.

Definition at line 520 of file nsBlockFrame.cpp.

{
  switch (aIndex) {
  case NS_BLOCK_FRAME_FLOAT_LIST_INDEX:
    return nsLayoutAtoms::floatList;
  case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
    return nsLayoutAtoms::bulletList;
  case NS_BLOCK_FRAME_OVERFLOW_LIST_INDEX:
    return nsLayoutAtoms::overflowList;
  case NS_BLOCK_FRAME_OVERFLOW_OOF_LIST_INDEX:
    return nsLayoutAtoms::overflowOutOfFlowList;
  case NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX:
    return mAbsoluteContainer.GetChildListName();
  default:
    return nsnull;
  }
}

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nscoord nsBlockFrame::GetAscent ( ) [inline, inherited]

Definition at line 270 of file nsBlockFrame.h.

{ return mAscent; }
nsresult nsMathMLFrame::GetAttribute ( nsIContent aContent,
nsIFrame aMathMLmstyleFrame,
nsIAtom aAttributeAtom,
nsString aValue 
) [static, inherited]

Definition at line 226 of file nsMathMLFrame.cpp.

{
  nsresult rv = NS_CONTENT_ATTR_NOT_THERE;

  // see if we can get the attribute from the content
  if (aContent) {
    rv = aContent->GetAttr(kNameSpaceID_None, aAttributeAtom, aValue);
  }

  if (NS_CONTENT_ATTR_NOT_THERE == rv) {
    // see if we can get the attribute from the mstyle frame
    if (aMathMLmstyleFrame) {
      nsIFrame* mstyleParent = aMathMLmstyleFrame->GetParent();

      nsPresentationData mstyleParentData;
      mstyleParentData.mstyle = nsnull;

      if (mstyleParent) {
        nsIMathMLFrame* mathMLFrame;
        mstyleParent->QueryInterface(NS_GET_IID(nsIMathMLFrame), (void**)&mathMLFrame);
        if (mathMLFrame) {
          mathMLFrame->GetPresentationData(mstyleParentData);
        }
      }

      // recurse all the way up into the <mstyle> hierarchy
      rv = GetAttribute(aMathMLmstyleFrame->GetContent(),
                     mstyleParentData.mstyle, aAttributeAtom, aValue);
    }
  }
  return rv;
}

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static void nsMathMLFrame::GetAxisHeight ( nsIFontMetrics fm,
nscoord axisHeight 
) [inline, static, inherited]

Definition at line 385 of file nsMathMLFrame.h.

  {
    fm->GetXHeight (axisHeight);
    axisHeight = NSToCoordRound(250.000f/430.556f * axisHeight);
  }

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void nsMathMLFrame::GetAxisHeight ( nsIRenderingContext aRenderingContext,
nsIFontMetrics aFontMetrics,
nscoord aAxisHeight 
) [static, inherited]

Definition at line 302 of file nsMathMLFrame.cpp.

{
  // get the bounding metrics of the minus sign, the rendering context
  // is assumed to have been set with the font of the current style context
#ifdef NS_DEBUG
  nsCOMPtr<nsIFontMetrics> currFontMetrics;
  aRenderingContext.GetFontMetrics(*getter_AddRefs(currFontMetrics));
  NS_ASSERTION(currFontMetrics->Font().Equals(aFontMetrics->Font()),
       "unexpected state");
#endif
  nscoord xHeight;
  aFontMetrics->GetXHeight(xHeight);
  PRUnichar minus = 0x2212; // not '-', but official Unicode minus sign
  nsBoundingMetrics bm;
  nsresult rv = aRenderingContext.GetBoundingMetrics(&minus, PRUint32(1), bm);
  if (NS_SUCCEEDED(rv)) {
    aAxisHeight = bm.ascent - (bm.ascent + bm.descent)/2;
  }
  if (NS_FAILED(rv) || aAxisHeight <= 0 || aAxisHeight >= xHeight) {
    // fall-back to the other version
    GetAxisHeight(aFontMetrics, aAxisHeight);
  }
}

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static void nsMathMLFrame::GetBigOpSpacings ( nsIFontMetrics fm,
nscoord bigOpSpacing1,
nscoord bigOpSpacing2,
nscoord bigOpSpacing3,
nscoord bigOpSpacing4,
nscoord bigOpSpacing5 
) [inline, static, inherited]

Definition at line 393 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    bigOpSpacing1 = NSToCoordRound(111.111f/430.556f * xHeight);
    bigOpSpacing2 = NSToCoordRound(166.667f/430.556f * xHeight);
    bigOpSpacing3 = NSToCoordRound(200.000f/430.556f * xHeight);
    bigOpSpacing4 = NSToCoordRound(600.000f/430.556f * xHeight);
    bigOpSpacing5 = NSToCoordRound(100.000f/430.556f * xHeight);
  }

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NS_IMETHOD nsMathMLFrame::GetBoundingMetrics ( nsBoundingMetrics &  aBoundingMetrics) [inline, virtual, inherited]

Implements nsIMathMLFrame.

Definition at line 75 of file nsMathMLFrame.h.

                                                          {
    aBoundingMetrics = mBoundingMetrics;
    return NS_OK;
  }
nsresult nsBlockFrame::GetClosestLine ( nsILineIterator aLI,
const nsPoint aPoint,
PRInt32 aClosestLine 
) [protected, inherited]

GetClosestLine will return the line that VERTICALLY owns the point closest to aPoint.y aPoint is the point to search for, relative to the origin of the frame that aLI iterates over.

aClosestLine is the result.

Definition at line 6594 of file nsBlockFrame.cpp.

{
  if (!aLI)
    return NS_ERROR_NULL_POINTER;

  nsRect rect;
  PRInt32 numLines;
  PRInt32 lineFrameCount;
  nsIFrame *firstFrame;
  PRUint32 flags;

  nsresult result = aLI->GetNumLines(&numLines);

  if (NS_FAILED(result) || numLines < 0)
    return NS_OK;//do not handle

  PRInt32 shifted = numLines;
  PRInt32 start = 0, midpoint = 0;
  PRInt32 y = 0;

  while(shifted > 0)
  {
    // Cut the number of lines to look at in half and
    // calculate the midpoint of the region we are looking at.

    shifted >>= 1; //divide by 2
    midpoint  = start + shifted;

    // Get the dimensions of the line that is at the half
    // point of the region we are looking at.

    result = aLI->GetLine(midpoint, &firstFrame, &lineFrameCount,rect,&flags);
    if (NS_FAILED(result))
      break;//do not handle

    // Check to see if our point lies with the line's Y bounds.

    y = aPoint.y - rect.y;
    if (y >=0 && (aPoint.y < (rect.y+rect.height)))
    {
      aClosestLine = midpoint; //spot on!
      return NS_OK;
    }

    if (y > 0)
    {
      // If we get here, no match was found above, so aPoint.y must
      // be greater than the Y bounds of the current line rect. Move
      // our starting point just beyond the midpoint of the current region.

      start = midpoint;

      if (numLines > 1 && start < (numLines - 1))
        ++start;
      else
        shifted = 0;
    }
  }

  // Make sure we don't go off the edge in either direction!

  NS_ASSERTION(start >=0 && start <= numLines, "Invalid start calculated.");

  if (start < 0)
    start = 0;
  else if (start >= numLines)
    start = numLines - 1; 

  aClosestLine = start; //close as we could come

  return NS_OK;
}

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static nsresult nsBlockFrame::GetCurrentLine ( nsBlockReflowState aState,
nsLineBox **  aOutCurrentLine 
) [static, inherited]
static void nsMathMLFrame::GetDenominatorShifts ( nsIFontMetrics fm,
nscoord denShift1,
nscoord denShift2 
) [inline, static, inherited]

Definition at line 362 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    denShift1 = NSToCoordRound(685.951f/430.556f * xHeight);
    denShift2 = NSToCoordRound(344.841f/430.556f * xHeight);
  }

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NS_IMETHOD nsMathMLFrame::GetEmbellishData ( nsEmbellishData aEmbellishData) [inline, virtual, inherited]

Implements nsIMathMLFrame.

Definition at line 118 of file nsMathMLFrame.h.

                                                    {
    aEmbellishData = mEmbellishData;
    return NS_OK;
  }
void nsMathMLFrame::GetEmbellishDataFrom ( nsIFrame aFrame,
nsEmbellishData aEmbellishData 
) [static, inherited]

Definition at line 160 of file nsMathMLFrame.cpp.

{
  // initialize OUT params
  aEmbellishData.flags = 0;
  aEmbellishData.coreFrame = nsnull;
  aEmbellishData.direction = NS_STRETCH_DIRECTION_UNSUPPORTED;
  aEmbellishData.leftSpace = 0;
  aEmbellishData.rightSpace = 0;

  if (aFrame && aFrame->IsFrameOfType(nsIFrame::eMathML)) {
    nsIMathMLFrame* mathMLFrame;
    CallQueryInterface(aFrame, &mathMLFrame);
    if (mathMLFrame) {
      mathMLFrame->GetEmbellishData(aEmbellishData);
    }
  }
}

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static void nsMathMLFrame::GetEmHeight ( nsIFontMetrics fm,
nscoord emHeight 
) [inline, static, inherited]

Definition at line 373 of file nsMathMLFrame.h.

  {
#if 0 
    // should switch to this API in order to scale with changes of TextZoom
    fm->GetEmHeight(emHeight);
#else
    emHeight = NSToCoordRound(float(fm->Font().size));
#endif
  }

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nsIFrame * nsBlockFrame::GetFirstChild ( nsIAtom aListName) const [virtual, inherited]

Reimplemented in nsComboboxControlFrame.

Definition at line 491 of file nsBlockFrame.cpp.

{
  if (mAbsoluteContainer.GetChildListName() == aListName) {
    nsIFrame* result = nsnull;
    mAbsoluteContainer.FirstChild(this, aListName, &result);
    return result;
  }
  else if (nsnull == aListName) {
    return (mLines.empty()) ? nsnull : mLines.front()->mFirstChild;
  }
  else if (aListName == nsLayoutAtoms::overflowList) {
    nsLineList* overflowLines = GetOverflowLines();
    return overflowLines ? overflowLines->front()->mFirstChild : nsnull;
  }
  else if (aListName == nsLayoutAtoms::overflowOutOfFlowList) {
    return GetOverflowOutOfFlows().FirstChild();
  }
  else if (aListName == nsLayoutAtoms::floatList) {
    return mFloats.FirstChild();
  }
  else if (aListName == nsLayoutAtoms::bulletList) {
    if (HaveOutsideBullet()) {
      return mBullet;
    }
  }
  return nsnull;
}

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Definition at line 6860 of file nsBlockFrame.cpp.

                                                         {
  if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
    return nsnull;
  }

  nsLineBox* property = NS_STATIC_CAST(nsLineBox*,
    GetProperty(nsLayoutAtoms::lineCursorProperty));
  line_iterator cursor = mLines.begin(property);
  nsRect cursorArea = cursor->GetCombinedArea();

  while ((cursorArea.IsEmpty() || cursorArea.YMost() > y)
         && cursor != mLines.front()) {
    cursor = cursor.prev();
    cursorArea = cursor->GetCombinedArea();
  }
  while ((cursorArea.IsEmpty() || cursorArea.YMost() <= y)
         && cursor != mLines.back()) {
    cursor = cursor.next();
    cursorArea = cursor->GetCombinedArea();
  }

  if (cursor.get() != property) {
    SetProperty(nsLayoutAtoms::lineCursorProperty,
                cursor.get(), nsnull);
  }

  return cursor.get();
}

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NS_IMETHODIMP nsBlockFrame::GetFrameForPoint ( const nsPoint aPoint,
nsFramePaintLayer  aWhichLayer,
nsIFrame **  aFrame 
) [inherited]

Reimplemented in nsComboboxControlFrame, nsFileControlFrame, and nsSelectsAreaFrame.

Definition at line 6998 of file nsBlockFrame.cpp.

{
  nsresult rv;

  switch (aWhichLayer) {
    case NS_FRAME_PAINT_LAYER_FOREGROUND:
      rv = GetFrameForPointUsing(aPoint, nsnull,
                                 NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE,
                                 aFrame);
      if (NS_OK == rv) {
        return NS_OK;
      }
      if (nsnull != mBullet) {
        rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::bulletList,
                                   NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE,
                                   aFrame);
      }
      return rv;
      break;

    case NS_FRAME_PAINT_LAYER_FLOATS:
      // we painted our floats before our children, and thus
      // we should check floats within children first
      rv = GetFrameForPointUsing(aPoint, nsnull,
                                 NS_FRAME_PAINT_LAYER_FLOATS, PR_FALSE,
                                 aFrame);
      if (NS_OK == rv) {
        return NS_OK;
      }
      if (mFloats.NotEmpty()) {
        return GetFrameForPointUsing(aPoint, nsLayoutAtoms::floatList,
                                     NS_FRAME_PAINT_LAYER_ALL, PR_FALSE,
                                     aFrame);
      } else {
        return NS_ERROR_FAILURE;
      }
      break;

    case NS_FRAME_PAINT_LAYER_BACKGROUND:
      // we're a block, so PR_TRUE for consider self
      return GetFrameForPointUsing(aPoint, nsnull,
                                   NS_FRAME_PAINT_LAYER_BACKGROUND, PR_TRUE,
                                   aFrame);
      break;
  }
  // we shouldn't get here
  NS_ASSERTION(PR_FALSE, "aWhichLayer was not understood");
  return NS_ERROR_FAILURE;
}

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nsresult nsBlockFrame::GetFrameForPointUsing ( const nsPoint aPoint,
nsIAtom aList,
nsFramePaintLayer  aWhichLayer,
PRBool  aConsiderSelf,
nsIFrame **  aFrame 
) [inherited]

Definition at line 6911 of file nsBlockFrame.cpp.

{
  if (aList) {
    return nsContainerFrame::GetFrameForPointUsing(aPoint,
      aList, aWhichLayer, aConsiderSelf, aFrame);
  }

  PRBool inThisFrame = mRect.Contains(aPoint);

  if (! ((mState & NS_FRAME_OUTSIDE_CHILDREN) || inThisFrame ) ) {
    return NS_ERROR_FAILURE;
  }

  *aFrame = nsnull;
  nsPoint tmp(aPoint.x - mRect.x, aPoint.y - mRect.y);

  nsPoint originOffset;
  nsIView *view = nsnull;
  nsresult rv = GetOriginToViewOffset(originOffset, &view);

  if (NS_SUCCEEDED(rv) && view)
    tmp += originOffset;

  nsLineBox* cursor = GetFirstLineContaining(tmp.y);
  line_iterator line_end = end_lines();

  if (cursor) {
    // This is the fast path for large blocks
    for (line_iterator line = mLines.begin(cursor);
         line != line_end;
         ++line) {
      nsRect lineArea = line->GetCombinedArea();
      // Because we have a cursor, the combinedArea.ys are non-decreasing.
      // Once we've passed tmp.y, we can never see it again.
      if (!lineArea.IsEmpty()) {
        if (lineArea.y > tmp.y) {
          break;
        }
        GetFrameFromLine(lineArea, tmp, line, aWhichLayer, aFrame);
      }
    }
  } else {
    PRBool nonDecreasingYs = PR_TRUE;
    PRInt32 lineCount = 0;
    nscoord lastY = PR_INT32_MIN;
    nscoord lastYMost = PR_INT32_MIN;
    for (line_iterator line = mLines.begin();
         line != line_end;
         ++line) {
      nsRect lineArea = line->GetCombinedArea();
      if (!lineArea.IsEmpty()) {
        if (lineArea.y < lastY
            || lineArea.YMost() < lastYMost) {
          nonDecreasingYs = PR_FALSE;
        }
        lastY = lineArea.y;
        lastYMost = lineArea.YMost();

        GetFrameFromLine(lineArea, tmp, line, aWhichLayer, aFrame);
      }
      lineCount++;
    }

    if (nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
      SetupLineCursor();
    }
  }
  
  if (*aFrame) {
    return NS_OK;
  }

  if ( inThisFrame && aConsiderSelf ) {
    if (GetStyleVisibility()->IsVisible()) {
      *aFrame = this;
      return NS_OK;
    }
  }

  return NS_ERROR_FAILURE;
}

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static void nsMathMLFrame::GetItalicCorrection ( nsBoundingMetrics &  aBoundingMetrics,
nscoord aItalicCorrection 
) [inline, static, inherited]

Definition at line 248 of file nsMathMLFrame.h.

  {
    aItalicCorrection = aBoundingMetrics.rightBearing - aBoundingMetrics.width;
    if (0 > aItalicCorrection) {
      aItalicCorrection = 0;
    }
  }

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static void nsMathMLFrame::GetItalicCorrection ( nsBoundingMetrics &  aBoundingMetrics,
nscoord aLeftItalicCorrection,
nscoord aRightItalicCorrection 
) [inline, static, inherited]

Definition at line 258 of file nsMathMLFrame.h.

  {
    aRightItalicCorrection = aBoundingMetrics.rightBearing - aBoundingMetrics.width;
    if (0 > aRightItalicCorrection) {
      aRightItalicCorrection = 0;
    }
    aLeftItalicCorrection = -aBoundingMetrics.leftBearing;
    if (0 > aLeftItalicCorrection) {
      aLeftItalicCorrection = 0;
    }
  }

Implements nsIMathMLFrame.

Reimplemented in nsMathMLmfracFrame, nsMathMLmoFrame, and nsMathMLTokenFrame.

Definition at line 66 of file nsMathMLFrame.cpp.

{
  // see if it is an embellished operator (mapped to 'Op' in TeX)
  if (mEmbellishData.coreFrame)
    return GetMathMLFrameTypeFor(mEmbellishData.coreFrame);

  // if it has a prescribed base, fetch the type from there
  if (mPresentationData.baseFrame)
    return GetMathMLFrameTypeFor(mPresentationData.baseFrame);

  // everything else is treated as ordinary (mapped to 'Ord' in TeX)
  return eMathMLFrameType_Ordinary;  
}
static eMathMLFrameType nsMathMLFrame::GetMathMLFrameTypeFor ( nsIFrame aFrame) [inline, static, inherited]

Definition at line 235 of file nsMathMLFrame.h.

  {
    if (aFrame->IsFrameOfType(nsIFrame::eMathML)) {
      nsIMathMLFrame* mathMLFrame;
      CallQueryInterface(aFrame, &mathMLFrame);
      if (mathMLFrame)
        return mathMLFrame->GetMathMLFrameType();
    }
    return eMathMLFrameType_UNKNOWN;
  }

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static void nsMathMLFrame::GetNumeratorShifts ( nsIFontMetrics fm,
nscoord numShift1,
nscoord numShift2,
nscoord numShift3 
) [inline, static, inherited]

Definition at line 349 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    numShift1 = NSToCoordRound(676.508f/430.556f * xHeight);
    numShift2 = NSToCoordRound(393.732f/430.556f * xHeight);
    numShift3 = NSToCoordRound(443.731f/430.556f * xHeight);
  }

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nsLineList * nsBlockFrame::GetOverflowLines ( ) const [inherited]

Definition at line 5158 of file nsBlockFrame.cpp.

{
  if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES)) {
    return nsnull;
  }
  nsLineList* lines = NS_STATIC_CAST(nsLineList*,
    GetProperty(nsLayoutAtoms::overflowLinesProperty));
  NS_ASSERTION(lines && !lines->empty(),
               "value should always be stored and non-empty when state set");
  return lines;
}

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nsFrameList nsBlockFrame::GetOverflowOutOfFlows ( ) const [protected, inherited]

Definition at line 5220 of file nsBlockFrame.cpp.

{
  if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
    return nsFrameList();
  }
  nsIFrame* result = NS_STATIC_CAST(nsIFrame*,
    GetProperty(nsLayoutAtoms::overflowOutOfFlowsProperty));
  NS_ASSERTION(result, "value should always be non-empty when state set");
  return nsFrameList(result);
}

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nsFrameList * nsBlockFrame::GetOverflowPlaceholders ( ) const [protected, inherited]

Definition at line 5251 of file nsBlockFrame.cpp.

{
  if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_PLACEHOLDERS)) {
    return nsnull;
  }
  nsFrameList* result = NS_STATIC_CAST(nsFrameList*,
    GetProperty(nsLayoutAtoms::overflowPlaceholdersProperty));
  NS_ASSERTION(result, "value should always be non-empty when state set");
  return result;
}

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NS_IMETHOD nsMathMLFrame::GetPresentationData ( nsPresentationData aPresentationData) [inline, virtual, inherited]

Implements nsIMathMLFrame.

Definition at line 130 of file nsMathMLFrame.h.

                                                             {
    aPresentationData = mPresentationData;
    return NS_OK;
  }

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void nsMathMLFrame::GetPresentationDataFrom ( nsIFrame aFrame,
nsPresentationData aPresentationData,
PRBool  aClimbTree = PR_TRUE 
) [static, inherited]

Definition at line 182 of file nsMathMLFrame.cpp.

{
  // initialize OUT params
  aPresentationData.flags = 0;
  aPresentationData.baseFrame = nsnull;
  aPresentationData.mstyle = nsnull;
  aPresentationData.scriptLevel = 0;

  nsIFrame* frame = aFrame;
  while (frame) {
    if (frame->IsFrameOfType(nsIFrame::eMathML)) {
      nsIMathMLFrame* mathMLFrame;
      CallQueryInterface(frame, &mathMLFrame);
      if (mathMLFrame) {
        mathMLFrame->GetPresentationData(aPresentationData);
        break;
      }
    }
    // stop if the caller doesn't want to lookup beyond the frame
    if (!aClimbTree) {
      break;
    }
    // stop if we reach the root <math> tag
    nsIContent* content = frame->GetContent();
    NS_ASSERTION(content, "dangling frame without a content node");
    if (!content)
      break;

    if (content->Tag() == nsMathMLAtoms::math) {
      const nsStyleDisplay* display = frame->GetStyleDisplay();
      if (display->mDisplay == NS_STYLE_DISPLAY_BLOCK) {
        aPresentationData.flags |= NS_MATHML_DISPLAYSTYLE;
      }
      break;
    }
    frame = frame->GetParent();
  }
  NS_ASSERTION(frame, "bad MathML markup - could not find the top <math> element");
}

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NS_IMETHOD nsMathMLFrame::GetReference ( nsPoint aReference) [inline, virtual, inherited]

Implements nsIMathMLFrame.

Definition at line 87 of file nsMathMLFrame.h.

                                    {
    aReference = mReference;
    return NS_OK;
  }
static void nsMathMLFrame::GetRuleThickness ( nsIFontMetrics fm,
nscoord ruleThickness 
) [inline, static, inherited]

Definition at line 410 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    ruleThickness = NSToCoordRound(40.000f/430.556f * xHeight);
  }

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void nsMathMLFrame::GetRuleThickness ( nsIRenderingContext aRenderingContext,
nsIFontMetrics aFontMetrics,
nscoord aRuleThickness 
) [static, inherited]

Definition at line 263 of file nsMathMLFrame.cpp.

{
  // get the bounding metrics of the overbar char, the rendering context
  // is assumed to have been set with the font of the current style context
#ifdef NS_DEBUG
  nsCOMPtr<nsIFontMetrics> currFontMetrics;
  aRenderingContext.GetFontMetrics(*getter_AddRefs(currFontMetrics));
  NS_ASSERTION(currFontMetrics->Font().Equals(aFontMetrics->Font()),
      "unexpected state");
#endif
  nscoord xHeight;
  aFontMetrics->GetXHeight(xHeight);
  PRUnichar overBar = 0x00AF;
  nsBoundingMetrics bm;
  nsresult rv = aRenderingContext.GetBoundingMetrics(&overBar, PRUint32(1), bm);
  if (NS_SUCCEEDED(rv)) {
    aRuleThickness = bm.ascent + bm.descent;
  }
  if (NS_FAILED(rv) || aRuleThickness <= 0 || aRuleThickness >= xHeight) {
    // fall-back to the other version
    GetRuleThickness(aFontMetrics, aRuleThickness);
  }

#if 0
  nscoord oldRuleThickness;
  GetRuleThickness(aFontMetrics, oldRuleThickness);

  PRUnichar sqrt = 0xE063; // a sqrt glyph from TeX's CMEX font
  rv = aRenderingContext.GetBoundingMetrics(&sqrt, PRUint32(1), bm);
  nscoord sqrtrule = bm.ascent; // according to TeX, the ascent should be the rule

  printf("xheight:%4d rule:%4d oldrule:%4d  sqrtrule:%4d\n",
          xHeight, aRuleThickness, oldRuleThickness, sqrtrule);
#endif
}

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static void nsMathMLFrame::GetSkewCorrectionFromChild ( nsIFrame aChild,
nscoord aSkewCorrection 
) [inline, static, inherited]

Definition at line 294 of file nsMathMLFrame.h.

  {
    // default is 0
    // individual classes should over-ride this method if necessary
    aSkewCorrection = 0;
  }
virtual PRIntn nsMathMLmtdInnerFrame::GetSkipSides ( ) const [inline, protected, virtual]

Reimplemented from nsBlockFrame.

Definition at line 178 of file nsMathMLmtableFrame.h.

{ return 0; }
static void nsMathMLFrame::GetSubDrop ( nsIFontMetrics fm,
nscoord aSubDrop 
) [inline, static, inherited]

Definition at line 331 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    aSubDrop = NSToCoordRound(50.000f/430.556f * xHeight);
  }

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static void nsMathMLFrame::GetSubDropFromChild ( nsIFrame aChild,
nscoord aSubDrop 
) [inline, static, inherited]

Definition at line 274 of file nsMathMLFrame.h.

  {
    const nsStyleFont* font = aChild->GetStyleFont();
    nsCOMPtr<nsIFontMetrics> fm = aChild->GetPresContext()->GetMetricsFor(
                                                              font->mFont);
    GetSubDrop(fm, aSubDrop);
  }

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static void nsMathMLFrame::GetSubScriptShifts ( nsIFontMetrics fm,
nscoord aSubScriptShift1,
nscoord aSubScriptShift2 
) [inline, static, inherited]

Definition at line 304 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    aSubScriptShift1 = NSToCoordRound(150.000f/430.556f * xHeight);
    aSubScriptShift2 = NSToCoordRound(247.217f/430.556f * xHeight);
  }

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static void nsMathMLFrame::GetSupDrop ( nsIFontMetrics fm,
nscoord aSupDrop 
) [inline, static, inherited]

Definition at line 340 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    aSupDrop = NSToCoordRound(386.108f/430.556f * xHeight);
  }

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static void nsMathMLFrame::GetSupDropFromChild ( nsIFrame aChild,
nscoord aSupDrop 
) [inline, static, inherited]

Definition at line 284 of file nsMathMLFrame.h.

  {
    const nsStyleFont* font = aChild->GetStyleFont();
    nsCOMPtr<nsIFontMetrics> fm = aChild->GetPresContext()->GetMetricsFor(
                                                              font->mFont);
    GetSupDrop(fm, aSupDrop);
  }

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static void nsMathMLFrame::GetSupScriptShifts ( nsIFontMetrics fm,
nscoord aSupScriptShift1,
nscoord aSupScriptShift2,
nscoord aSupScriptShift3 
) [inline, static, inherited]

Definition at line 316 of file nsMathMLFrame.h.

  {
    nscoord xHeight;
    fm->GetXHeight(xHeight);
    aSupScriptShift1 = NSToCoordRound(412.892f/430.556f * xHeight);
    aSupScriptShift2 = NSToCoordRound(362.892f/430.556f * xHeight);
    aSupScriptShift3 = NSToCoordRound(288.889f/430.556f * xHeight);
  }

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nsIFrame * nsBlockFrame::GetTopBlockChild ( nsPresContext aPresContext) [inherited]

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.

Definition at line 3219 of file nsBlockFrame.cpp.

{
  if (mLines.empty())
    return nsnull;

  nsLineBox *firstLine = mLines.front();
  if (firstLine->IsBlock())
    return firstLine->mFirstChild;

  if (!firstLine->CachedIsEmpty())
    return nsnull;

  line_iterator secondLine = begin_lines();
  ++secondLine;
  if (secondLine == end_lines() || !secondLine->IsBlock())
    return nsnull;

  return secondLine->mFirstChild;
}

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nsIAtom * nsBlockFrame::GetType ( void  ) const [virtual, inherited]

Reimplemented in nsAreaFrame, nsLegendFrame, and nsTableCaptionFrame.

Definition at line 482 of file nsBlockFrame.cpp.

{
  return nsLayoutAtoms::blockFrame;
}

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NS_IMETHODIMP nsBlockFrame::HandleEvent ( nsPresContext aPresContext,
nsGUIEvent aEvent,
nsEventStatus aEventStatus 
) [inherited]

Reimplemented in nsComboboxControlFrame.

Definition at line 6670 of file nsBlockFrame.cpp.

{

  nsresult result;
  nsIPresShell *shell = nsnull;
  if (aEvent->message == NS_MOUSE_MOVE) {
    shell = aPresContext->GetPresShell();
    if (!shell)
      return NS_OK;
    nsCOMPtr<nsIFrameSelection> frameSelection;
    PRBool mouseDown = PR_FALSE;
//check to see if we need to ask the selection controller..
    if (mState & NS_FRAME_INDEPENDENT_SELECTION)
    {
      nsCOMPtr<nsISelectionController> selCon;
      result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
      if (NS_FAILED(result) || !selCon)
        return result?result:NS_ERROR_FAILURE;
      frameSelection = do_QueryInterface(selCon);
    }
    else
      frameSelection = shell->FrameSelection();
    if (!frameSelection || NS_FAILED(frameSelection->GetMouseDownState(&mouseDown)) || !mouseDown) 
      return NS_OK;//do not handle
  }

  if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN || aEvent->message == NS_MOUSE_MOVE ||
    aEvent->message == NS_MOUSE_LEFT_DOUBLECLICK ) {

    nsMouseEvent *me = (nsMouseEvent *)aEvent;

    nsIFrame *resultFrame = nsnull;//this will be passed the handle event when we 
                                   //can tell who to pass it to
    nsIFrame *mainframe = this;
    shell = aPresContext->GetPresShell();
    if (!shell)
      return NS_OK;
    nsCOMPtr<nsILineIterator> it( do_QueryInterface(mainframe, &result) );
    nsPeekOffsetStruct pos;
    nsPoint viewOffset;
    nsIView* parentWithView;
    GetOffsetFromView(viewOffset, &parentWithView);
    // The offset returned by GetOffsetFromView is not trustworthy.
    // It's just the sum of frame positions and is not the true
    // geometric offset. So recalculate the true geometric offset.
    NS_ASSERTION(nsLayoutUtils::GetFrameFor(parentWithView),
                 "GetOffsetFromView shouldn't be returning a frameless view");
    viewOffset = GetOffsetTo(nsLayoutUtils::GetFrameFor(parentWithView));

    while(NS_OK == result)
    { //we are starting aloop to allow us to "drill down to the one we want"
      PRInt32 closestLine;

      // aEvent->point is relative to our view. We need to make it relative to
      // mainframe, via this frame.
      if (NS_FAILED(result = GetClosestLine(it,
          aEvent->point - viewOffset - mainframe->GetOffsetTo(this), closestLine)))
        return result;
      
      //we will now ask where to go. if we cant find what we want"aka another block frame" 
      //we drill down again
      pos.mShell = shell;
      pos.mDirection = eDirNext;
      pos.mDesiredX = aEvent->point.x;
      pos.mScrollViewStop = PR_FALSE;
      pos.mIsKeyboardSelect = PR_FALSE;
      result = nsFrame::GetNextPrevLineFromeBlockFrame(aPresContext,
                                          &pos,
                                          mainframe, 
                                          closestLine-1, 
                                          0
                                          );
      
      if (NS_SUCCEEDED(result) && pos.mResultFrame){
        if (result == NS_OK)
          it = do_QueryInterface(pos.mResultFrame, &result);//if this fails thats ok
        resultFrame = pos.mResultFrame;
        mainframe = resultFrame;
      }
      else
        break;//time to go nothing was found
    }
    //end while loop. if nssucceeded resutl then keep going that means
    //we have successfully hit another block frame and we should keep going.


    if (resultFrame)
    {
      // Translate aEvent->point to resultFrame's closest view (bug 180015).
      nsPoint tmp;
      nsIView* resultFrameParentView;
      resultFrame->GetOffsetFromView(tmp, &resultFrameParentView);
      if (parentWithView != resultFrameParentView && resultFrameParentView) {
        aEvent->point -= resultFrameParentView->GetOffsetTo(parentWithView);
      }

      if (NS_POSITION_BEFORE_TABLE == result)
      {
        nsCOMPtr<nsISelectionController> selCon;
        result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
        //get the selection controller
        if (NS_SUCCEEDED(result) && selCon) 
        {
          PRInt16 displayresult;
          selCon->GetDisplaySelection(&displayresult);
          if (displayresult == nsISelectionController::SELECTION_OFF)
            return NS_OK;//nothing to do we cannot affect selection from here
        }
        PRBool mouseDown = aEvent->message == NS_MOUSE_MOVE;
        result = shell->FrameSelection()->HandleClick(pos.mResultContent,
                                                      pos.mContentOffset, 
                                                      pos.mContentOffsetEnd,
                                                      mouseDown || me->isShift,
                                                      PR_FALSE,
                                                      pos.mPreferLeft);
      }
      else
        result = resultFrame->HandleEvent(aPresContext, aEvent, aEventStatus);//else let the frame/container do what it needs
      /* Note that the above call to HandleEvent may capture the
         mouse. If so, don't try to capture again. */
      if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
          CaptureMouse(aPresContext, PR_TRUE);
      return result;
    }
    else
    {
      return NS_OK; //just stop it
    }
  }
  return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}

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Call this when a frame will be pulled from the block's next-in-flow into this frame.

If it's a continuation placeholder, it should not be here so we push it into our overflow placeholders list. To avoid creating holes (e.g., the following block doesn't have a placeholder but the block after it does) we also need to pull all the following placeholders and put them in our overflow placeholders list too.

If it's a first-in-flow placeholder, or it contains one, then we need to do this to the continuation placeholders.

We return PR_TRUE if we removed the frame and it cannot be used. If we return PR_FALSE then the frame must be pulled immediately.

Definition at line 4801 of file nsBlockFrame.cpp.

{
  if (nsLayoutAtoms::placeholderFrame != aFrame->GetType()) {
    // Descend into children that are not float containing blocks.
    // We should encounter only first-in-flow placeholders, so the
    // frame subtree rooted at aFrame should not change.
    if (!aFrame->IsFloatContainingBlock()) {
      for (nsIFrame* f = aFrame->GetFirstChild(nsnull); f; f = f->GetNextSibling()) {
#ifdef DEBUG
        PRBool changed =
#endif
          HandleOverflowPlaceholdersForPulledFrame(aState, f);
        NS_ASSERTION(!changed, "Shouldn't find any continuation placeholders inside inlines");
      }
    }
    return PR_FALSE;
  }

  PRBool taken = PR_TRUE;
  nsIFrame* frame = aFrame;
  if (!aFrame->GetPrevInFlow()) {
    // First in flow frame. We only want to deal with its
    // next in flows, if there are any.
    taken = PR_FALSE;
    frame = frame->GetNextInFlow();
    if (!frame)
      return PR_FALSE;
  }

  nsBlockFrame* parent = NS_STATIC_CAST(nsBlockFrame*, frame->GetParent());
  // Remove aFrame and all its next in flows from their parents, but
  // don't destroy the frames.
#ifdef DEBUG
  nsresult rv =
#endif
    parent->DoRemoveFrame(frame, PR_FALSE);
  NS_ASSERTION(NS_SUCCEEDED(rv), "frame should be in parent's lists");
  
  nsIFrame* lastOverflowPlace = aState.mOverflowPlaceholders.LastChild();
  while (frame) {
    NS_ASSERTION(IsContinuationPlaceholder(frame),
                 "Should only be dealing with continuation placeholders here");

    parent = NS_STATIC_CAST(nsBlockFrame*, frame->GetParent());
    ReparentFrame(frame, parent, this);

    // continuation placeholders are always direct children of a block
    nsIFrame* outOfFlow = nsPlaceholderFrame::GetRealFrameForPlaceholder(frame);

    if (!parent->mFloats.RemoveFrame(outOfFlow)) {
      nsAutoOOFFrameList oofs(parent);
#ifdef DEBUG
      PRBool found =
#endif
        oofs.mList.RemoveFrame(outOfFlow);
      NS_ASSERTION(found, "Must have the out of flow in some child list");
    }
    ReparentFrame(outOfFlow, parent, this);

    aState.mOverflowPlaceholders.InsertFrames(nsnull, lastOverflowPlace, frame);
    // outOfFlow isn't inserted anywhere yet. Eventually the overflow
    // placeholders get put into the overflow lines, and at the same time we
    // insert the placeholders' out of flows into the overflow out-of-flows
    // list.
    lastOverflowPlace = frame;

    frame = frame->GetNextInFlow();
  }

  return taken;
}

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Call this when a line will be pulled from the block's next-in-flow's line.

Returns:
PR_TRUE we consumed the entire line, delete it and try again

Definition at line 4881 of file nsBlockFrame.cpp.

{
  // First, see if it's a line of continuation placeholders. If it
  // is, remove one and retry.
  if (aLine->mFirstChild && IsContinuationPlaceholder(aLine->mFirstChild)) {
    PRBool taken =
      HandleOverflowPlaceholdersForPulledFrame(aState, aLine->mFirstChild);
    NS_ASSERTION(taken, "We must have removed that frame");
    return PR_TRUE;
  }
 
  // OK, it's a normal line. Scan it for floats with continuations that
  // need to be taken care of. We won't need to change the line.
  PRInt32 n = aLine->GetChildCount();
  for (nsIFrame* f = aLine->mFirstChild; n > 0; f = f->GetNextSibling(), --n) {
#ifdef DEBUG
    PRBool taken =
#endif
      HandleOverflowPlaceholdersForPulledFrame(aState, f);
    NS_ASSERTION(!taken, "Shouldn't be any continuation placeholders on this line");
  }

  return PR_FALSE;
}

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PRBool nsBlockFrame::HaveOutsideBullet ( ) const [inline, protected, inherited]

Definition at line 337 of file nsBlockFrame.h.

                                   {
#if defined(DEBUG) && !defined(DEBUG_rods)
    if(mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET) {
      NS_ASSERTION(mBullet,"NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET flag set and no mBullet");
    }
#endif
    return 0 != (mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
  }

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NS_IMETHODIMP nsMathMLFrame::InheritAutomaticData ( nsIFrame aParent) [virtual, inherited]
NS_IMETHODIMP nsMathMLmtdInnerFrame::Init ( nsPresContext aPresContext,
nsIContent aContent,
nsIFrame aParent,
nsStyleContext aContext,
nsIFrame aPrevInFlow 
)

Reimplemented from nsBlockFrame.

Definition at line 694 of file nsMathMLmtableFrame.cpp.

{
  nsresult rv = nsBlockFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);

  // record that children that are ignorable whitespace should be excluded
  mState |= NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE;

  return rv;
}
NS_IMETHODIMP nsBlockFrame::InsertFrames ( nsIAtom aListName,
nsIFrame aPrevFrame,
nsIFrame aFrameList 
) [inherited]

Reimplemented in nsMathMLmathBlockFrame, nsMathMLForeignFrameWrapper, and nsSVGForeignObjectFrame.

Definition at line 5319 of file nsBlockFrame.cpp.

{
  if (mAbsoluteContainer.GetChildListName() == aListName) {
    return mAbsoluteContainer.InsertFrames(this, aListName, aPrevFrame,
                                           aFrameList);
  }
  else if (nsLayoutAtoms::floatList == aListName) {
    mFloats.InsertFrames(this, aPrevFrame, aFrameList);
    return NS_OK;
  }
#ifdef IBMBIDI
  else if (nsLayoutAtoms::nextBidi == aListName) {}
#endif // IBMBIDI
  else if (nsnull != aListName) {
    return NS_ERROR_INVALID_ARG;
  }

#ifdef NOISY_REFLOW_REASON
  ListTag(stdout);
  printf(": insert ");
  nsFrame::ListTag(stdout, aFrameList);
  if (aPrevFrame) {
    printf(" after ");
    nsFrame::ListTag(stdout, aPrevFrame);
  }
  printf("\n");
#endif
  nsresult rv = AddFrames(aFrameList, aPrevFrame);
#ifdef IBMBIDI
  if (aListName != nsLayoutAtoms::nextBidi)
#endif // IBMBIDI
  if (NS_SUCCEEDED(rv)) {
    // Ask the parent frame to reflow me.
    ReflowDirtyChild(GetPresContext()->PresShell(), nsnull);
  }
  return rv;
}

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PRBool nsBlockFrame::IsContainingBlock ( ) const [virtual, inherited]

Definition at line 539 of file nsBlockFrame.cpp.

{
  return PR_TRUE;
}
PRBool nsBlockFrame::IsEmpty ( void  ) [virtual, inherited]

Definition at line 3166 of file nsBlockFrame.cpp.

{
  if (!IsSelfEmpty()) {
    return PR_FALSE;
  }

  for (line_iterator line = begin_lines(), line_end = end_lines();
       line != line_end;
       ++line)
  {
    if (!line->IsEmpty())
      return PR_FALSE;
  }

  return PR_TRUE;
}

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PRBool nsBlockFrame::IsFloatContainingBlock ( ) const [virtual, inherited]

Definition at line 545 of file nsBlockFrame.cpp.

{
  return PR_TRUE;
}

Definition at line 728 of file nsMathMLmtableFrame.cpp.

{
  return !(aFlags & ~nsIFrame::eMathML);
}
PRBool nsBlockFrame::IsSelfEmpty ( ) [virtual, inherited]

Definition at line 3118 of file nsBlockFrame.cpp.

{
  const nsStylePosition* position = GetStylePosition();

  switch (position->mMinHeight.GetUnit()) {
    case eStyleUnit_Coord:
      if (position->mMinHeight.GetCoordValue() != 0)
        return PR_FALSE;
      break;
    case eStyleUnit_Percent:
      if (position->mMinHeight.GetPercentValue() != 0.0f)
        return PR_FALSE;
      break;
    default:
      return PR_FALSE;
  }

  switch (position->mHeight.GetUnit()) {
    case eStyleUnit_Auto:
      break;
    case eStyleUnit_Coord:
      if (position->mHeight.GetCoordValue() != 0)
        return PR_FALSE;
      break;
    case eStyleUnit_Percent:
      if (position->mHeight.GetPercentValue() != 0.0f)
        return PR_FALSE;
      break;
    default:
      return PR_FALSE;
  }

  const nsStyleBorder* border = GetStyleBorder();
  const nsStylePadding* padding = GetStylePadding();
  nsStyleCoord coord;
  if (border->GetBorderWidth(NS_SIDE_TOP) != 0 ||
      border->GetBorderWidth(NS_SIDE_BOTTOM) != 0 ||
      !IsPaddingZero(padding->mPadding.GetTopUnit(),
                    padding->mPadding.GetTop(coord)) ||
      !IsPaddingZero(padding->mPadding.GetBottomUnit(),
                    padding->mPadding.GetBottom(coord))) {
    return PR_FALSE;
  }

  return PR_TRUE;
}

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NS_IMETHODIMP nsBlockFrame::IsSplittable ( nsSplittableType aIsSplittable) const [inherited]

Definition at line 353 of file nsBlockFrame.cpp.

{
  aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
  return NS_OK;
}
NS_IMETHODIMP nsBlockFrame::IsVisibleForPainting ( nsPresContext aPresContext,
nsIRenderingContext aRenderingContext,
PRBool  aCheckVis,
PRBool aIsVisible 
) [inherited]

Definition at line 6239 of file nsBlockFrame.cpp.

{
  // first check to see if we are visible
  if (aCheckVis) {
    if (!GetStyleVisibility()->IsVisible()) {
      *aIsVisible = PR_FALSE;
      return NS_OK;
    }
  }

  // Start by assuming we are visible and need to be painted
  *aIsVisible = PR_TRUE;

  // NOTE: GetSelectionforVisCheck checks the pagination to make sure we are printing
  // In otherwords, the selection will ALWAYS be null if we are not printing, meaning
  // the visibility will be TRUE in that case
  nsCOMPtr<nsISelection> selection;
  nsresult rv = GetSelectionForVisCheck(aPresContext, getter_AddRefs(selection));
  if (NS_SUCCEEDED(rv) && selection) {
    nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));

    nsCOMPtr<nsIDOMHTMLHtmlElement> html(do_QueryInterface(mContent));
    nsCOMPtr<nsIDOMHTMLBodyElement> body(do_QueryInterface(mContent));

    if (!html && !body) {
      rv = selection->ContainsNode(node, PR_TRUE, aIsVisible);
    }
  }

  return rv;
}

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nsIFrame * nsBlockFrame::LastChild ( ) [protected, inherited]

Definition at line 5266 of file nsBlockFrame.cpp.

{
  if (! mLines.empty()) {
    return mLines.back()->LastChild();
  }
  return nsnull;
}

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PRInt32 nsMathMLFrame::MapAttributesIntoCSS ( nsPresContext aPresContext,
nsIContent aContent 
) [static, inherited]

Definition at line 582 of file nsMathMLFrame.cpp.

{
  // normal case, quick return if there are no attributes
  NS_ASSERTION(aContent, "null arg");
  PRUint32 attrCount = 0;
  if (aContent)
    attrCount = aContent->GetAttrCount();
  if (!attrCount)
    return 0;

  // need to initialize here -- i.e., after registering nsMathMLAtoms
  static const nsCSSMapping
  kCSSMappingTable[] = {
    {kMathMLversion2, nsMathMLAtoms::mathcolor_,      "color:"},
    {kMathMLversion1, nsMathMLAtoms::color_,          "color:"},
    {kMathMLversion2, nsMathMLAtoms::mathsize_,       "font-size:"},
    {kMathMLversion1, nsMathMLAtoms::fontsize_,       "font-size:"},
    {kMathMLversion1, nsMathMLAtoms::fontfamily_,     "font-family:"},
    {kMathMLversion2, nsMathMLAtoms::mathbackground_, "background-color:"},
    {kMathMLversion1, nsMathMLAtoms::background_,     "background-color:"},
    {0, nsnull, nsnull}
  };

  nsCOMPtr<nsIDocument> doc;
  nsCOMPtr<nsIStyleSheet> sheet;
  nsCOMPtr<nsICSSStyleSheet> cssSheet;
  nsCOMPtr<nsIDOMCSSStyleSheet> domSheet;

  PRInt32 nameSpaceID;
  nsCOMPtr<nsIAtom> prefix;
  nsCOMPtr<nsIAtom> attrAtom;
  PRInt32 ruleCount = 0;
  for (PRUint32 i = 0; i < attrCount; ++i) {
    aContent->GetAttrNameAt(i, &nameSpaceID,
                            getter_AddRefs(attrAtom),
                            getter_AddRefs(prefix));

    // lookup the equivalent CSS property
    const nsCSSMapping* map = kCSSMappingTable;
    while (map->attrAtom && map->attrAtom != attrAtom)
      ++map;
    if (!map->attrAtom)
      continue;
    nsAutoString cssProperty(NS_ConvertASCIItoUCS2(map->cssProperty));

    nsAutoString attrValue;
    aContent->GetAttr(nameSpaceID, attrAtom, attrValue);
    if (attrValue.IsEmpty())
      continue;
    nsAutoString escapedAttrValue;
    nsStyleUtil::EscapeCSSString(attrValue, escapedAttrValue);

    // don't add rules that are already in mathml.css
    // (this will also clean up whitespace before units - see bug 125303)
    if (attrAtom == nsMathMLAtoms::fontsize_ || attrAtom == nsMathMLAtoms::mathsize_) {
      nsCSSValue cssValue;
      nsAutoString numericValue(attrValue);
      if (!ParseNumericValue(numericValue, cssValue))
        continue;
      // on exit, ParseNumericValue also returns a nicer string
      // in which the whitespace before the unit is cleaned up 
      cssProperty.Append(numericValue);
    }
    else
      cssProperty.Append(attrValue);

    nsAutoString attrName;
    attrAtom->ToString(attrName);

    // make a style rule that maps to the equivalent CSS property
    nsAutoString cssRule;
    cssRule.Assign(NS_LITERAL_STRING("[")  + attrName +
                   NS_LITERAL_STRING("='") + escapedAttrValue +
                   NS_LITERAL_STRING("']{") + cssProperty + NS_LITERAL_STRING("}"));

    if (!sheet) {
      // first time... we do this to defer the lookup up to the
      // point where we encounter attributes that actually matter
      doc = aContent->GetDocument();
      if (!doc) 
        return 0;
      GetMathMLAttributeStyleSheet(aPresContext, getter_AddRefs(sheet));
      if (!sheet)
        return 0;
      // by construction, these cannot be null at this point
      cssSheet = do_QueryInterface(sheet);
      domSheet = do_QueryInterface(sheet);
      NS_ASSERTION(cssSheet && domSheet, "unexpected null pointers");
      // we will keep the sheet orphan as we populate it. This way,
      // observers of the document won't be notified and we avoid any troubles
      // that may come from reconstructing the frame tree. Our rules only need
      // a re-resolve of style data and a reflow, not a reconstruct-all...
      sheet->SetOwningDocument(nsnull);
    }

    // check for duplicate, if a similar rule is already there, don't bother to add another one
    nsAutoString selector;
    selector.Assign(NS_LITERAL_STRING("*[") + attrName +
                    NS_LITERAL_STRING("=\"") + escapedAttrValue +
                    NS_LITERAL_STRING("\"]"));
    PRInt32 k, count;
    cssSheet->StyleRuleCount(count);
    for (k = 0; k < count; ++k) {
      nsAutoString tmpSelector;
      nsCOMPtr<nsICSSRule> tmpRule;
      cssSheet->GetStyleRuleAt(k, *getter_AddRefs(tmpRule));
      nsCOMPtr<nsICSSStyleRule> tmpStyleRule = do_QueryInterface(tmpRule);
      if (tmpStyleRule) {
        tmpStyleRule->GetSelectorText(tmpSelector);
        if (tmpSelector.Equals(selector)) {
          k = -1;
          break;
        }
      }
    }
    if (k >= 0) {
      // insert the rule (note: when the sheet already has @namespace and
      // friends, insert after them, e.g., at the end, otherwise it won't work)
      // For MathML 2, insert at the end to give it precedence
      PRInt32 pos = (map->compatibility == kMathMLversion2) ? count : 1;
      PRUint32 index;
      domSheet->InsertRule(cssRule, pos, &index);
      ++ruleCount;
    }
  }
  // restore the sheet to its owner
  if (sheet) {
    sheet->SetOwningDocument(doc);
  }

  return ruleCount;
}

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PRInt32 nsMathMLFrame::MapAttributesIntoCSS ( nsPresContext aPresContext,
nsIFrame aFrame 
) [static, inherited]

Definition at line 717 of file nsMathMLFrame.cpp.

{
  PRInt32 ruleCount = MapAttributesIntoCSS(aPresContext, aFrame->GetContent());
  if (!ruleCount)
    return 0;

  // now, re-resolve the style contexts in our subtree
  nsFrameManager *fm = aPresContext->FrameManager();
  nsStyleChangeList changeList;
  fm->ComputeStyleChangeFor(aFrame, &changeList, NS_STYLE_HINT_NONE);
#ifdef DEBUG
  // Use the parent frame to make sure we catch in-flows and such
  nsIFrame* parentFrame = aFrame->GetParent();
  fm->DebugVerifyStyleTree(parentFrame ? parentFrame : aFrame);
#endif

  return ruleCount;
}

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nsresult nsBlockFrame::MarkLineDirty ( line_iterator  aLine) [protected, inherited]

Mark |aLine| dirty, and, if necessary because of possible pull-up, mark the previous line dirty as well.

Definition at line 1723 of file nsBlockFrame.cpp.

{
  // Mark aLine dirty
  aLine->MarkDirty();
#ifdef DEBUG
  if (gNoisyReflow) {
    IndentBy(stdout, gNoiseIndent);
    ListTag(stdout);
    printf(": mark line %p dirty\n", NS_STATIC_CAST(void*, aLine.get()));
  }
#endif

  // Mark previous line dirty if its an inline line so that it can
  // maybe pullup something from the line just affected.
  // XXX We don't need to do this if aPrevLine ends in a break-after...
  if (aLine != mLines.front() &&
      aLine->IsInline() &&
      aLine.prev()->IsInline()) {
    aLine.prev()->MarkDirty();
#ifdef DEBUG
    if (gNoisyReflow) {
      IndentBy(stdout, gNoiseIndent);
      ListTag(stdout);
      printf(": mark prev-line %p dirty\n",
             NS_STATIC_CAST(void*, aLine.prev().get()));
    }
#endif
  }

  return NS_OK;
}

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nsMathMLFrame::NS_IMETHOD_ ( nsrefcnt  ) [inline, inherited]

Definition at line 62 of file nsMathMLFrame.h.

                                 {
    // not meaningfull for frames
    return 1;
  }
nsMathMLFrame::NS_IMETHOD_ ( nsrefcnt  ) [inline, inherited]

Definition at line 67 of file nsMathMLFrame.h.

                                  {
    // not meaningfull for frames
    return 1;
  }
NS_IMETHODIMP nsBlockFrame::Paint ( nsPresContext aPresContext,
nsIRenderingContext aRenderingContext,
const nsRect aDirtyRect,
nsFramePaintLayer  aWhichLayer,
PRUint32  aFlags = 0 
) [inherited]

Reimplemented in nsComboboxControlFrame, nsLegendFrame, nsFileControlFrame, nsIsIndexFrame, and nsSelectsAreaFrame.

Definition at line 6325 of file nsBlockFrame.cpp.

{
  if (NS_FRAME_IS_UNFLOWABLE & mState) {
    return NS_OK;
  }

#ifdef DEBUG
  if (gNoisyDamageRepair) {
    if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
      PRInt32 depth = GetDepth();
      nsRect ca;
      ::ComputeCombinedArea(mLines, mRect.width, mRect.height, ca);
      nsFrame::IndentBy(stdout, depth);
      ListTag(stdout);
      printf(": bounds=%d,%d,%d,%d dirty=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
             mRect.x, mRect.y, mRect.width, mRect.height,
             aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height,
             ca.x, ca.y, ca.width, ca.height);
    }
  }
#endif  

  if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
    PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
  }

  PRBool paintingSuppressed = PR_FALSE;  
  aPresContext->PresShell()->IsPaintingSuppressed(&paintingSuppressed);
  if (paintingSuppressed)
    return NS_OK;

  const nsStyleDisplay* disp = GetStyleDisplay();

  // If overflow is hidden then set the clip rect so that children don't
  // leak out of us. Note that because overflow'-clip' only applies to
  // the content area we do this after painting the border and background
  if (NS_STYLE_OVERFLOW_CLIP == disp->mOverflowX) {
    aRenderingContext.PushState();
    SetOverflowClipRect(aRenderingContext);
  }

  // Child elements have the opportunity to override the visibility
  // property and display even if the parent is hidden
  if (NS_FRAME_PAINT_LAYER_FLOATS == aWhichLayer) {
    PaintFloats(aPresContext, aRenderingContext, aDirtyRect);
  }

  PaintDecorationsAndChildren(aPresContext, aRenderingContext,
                              aDirtyRect, aWhichLayer, PR_TRUE);

  if (NS_STYLE_OVERFLOW_CLIP == disp->mOverflowX)
    aRenderingContext.PopState();

#if 0
  if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
    // Render the bands in the spacemanager
    nsSpaceManager* sm = mSpaceManager;

    if (nsnull != sm) {
      nsBlockBandData band;
      band.Init(sm, nsSize(mRect.width, mRect.height));
      nscoord y = 0;
      while (y < mRect.height) {
        nsRect availArea;
        band.GetAvailableSpace(y, PR_FALSE, availArea);
  
        // Render a box and a diagonal line through the band
        aRenderingContext.SetColor(NS_RGB(0,255,0));
        aRenderingContext.DrawRect(0, availArea.y,
                                   mRect.width, availArea.height);
        aRenderingContext.DrawLine(0, availArea.y,
                                   mRect.width, availArea.YMost());
  
        // Render boxes and opposite diagonal lines around the
        // unavailable parts of the band.
        PRInt32 i;
        for (i = 0; i < band.GetTrapezoidCount(); i++) {
          const nsBandTrapezoid* trapezoid = band.GetTrapezoid(i);
          if (nsBandTrapezoid::Available != trapezoid->mState) {
            nsRect r = trapezoid->GetRect();
            if (nsBandTrapezoid::OccupiedMultiple == trapezoid->mState) {
              aRenderingContext.SetColor(NS_RGB(0,255,128));
            }
            else {
              aRenderingContext.SetColor(NS_RGB(128,255,0));
            }
            aRenderingContext.DrawRect(r);
            aRenderingContext.DrawLine(r.x, r.YMost(), r.XMost(), r.y);
          }
        }
        y = availArea.YMost();
      }
    }
  }
#endif

  return NS_OK;
}

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virtual void nsBlockFrame::PaintChild ( nsPresContext aPresContext,
nsIRenderingContext aRenderingContext,
const nsRect aDirtyRect,
nsIFrame aFrame,
nsFramePaintLayer  aWhichLayer,
PRUint32  aFlags = 0 
) [inline, virtual, inherited]

Definition at line 279 of file nsBlockFrame.h.

                                                           {
    nsContainerFrame::PaintChild(aPresContext, aRenderingContext,
                                 aDirtyRect, aFrame, aWhichLayer, aFlags);
  }

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void nsBlockFrame::PaintChildren ( nsPresContext aPresContext,
nsIRenderingContext aRenderingContext,
const nsRect aDirtyRect,
nsFramePaintLayer  aWhichLayer,
PRUint32  aFlags = 0 
) [protected, virtual, inherited]

Definition at line 6495 of file nsBlockFrame.cpp.

{
  PRInt32 drawnLines; // Will only be used if set (gLamePaintMetrics).
  PRInt32 depth = 0;
#ifdef DEBUG
  if (gNoisyDamageRepair) {
    if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
      depth = GetDepth();
    }
  }
  PRTime start = LL_ZERO; // Initialize these variables to silence the compiler.
  if (gLamePaintMetrics) {
    start = PR_Now();
    drawnLines = 0;
  }
#endif

  nsLineBox* cursor = GetFirstLineContaining(aDirtyRect.y);
  line_iterator line_end = end_lines();

  if (cursor) {
    for (line_iterator line = mLines.begin(cursor);
         line != line_end;
         ++line) {
      nsRect lineArea = line->GetCombinedArea();
      if (!lineArea.IsEmpty()) {
        // Because we have a cursor, the combinedArea.ys are non-decreasing.
        // Once we've passed aDirtyRect.YMost(), we can never see it again.
        if (lineArea.y >= aDirtyRect.YMost()) {
          break;
        }
        PaintLine(lineArea, aDirtyRect, line, depth, drawnLines, aPresContext,
                  aRenderingContext, aWhichLayer, this);
      }
    }
  } else {
    PRBool nonDecreasingYs = PR_TRUE;
    PRInt32 lineCount = 0;
    nscoord lastY = PR_INT32_MIN;
    nscoord lastYMost = PR_INT32_MIN;
    for (line_iterator line = begin_lines();
         line != line_end;
         ++line) {
      nsRect lineArea = line->GetCombinedArea();
      if (!lineArea.IsEmpty()) {
        if (lineArea.y < lastY
            || lineArea.YMost() < lastYMost) {
          nonDecreasingYs = PR_FALSE;
        }
        lastY = lineArea.y;
        lastYMost = lineArea.YMost();

        PaintLine(lineArea, aDirtyRect, line, depth, drawnLines, aPresContext,
                  aRenderingContext, aWhichLayer, this);
      }
      lineCount++;
    }

    if (nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
      SetupLineCursor();
    }
  }

  if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
    if ((nsnull != mBullet) && HaveOutsideBullet()) {
      // Paint outside bullets manually
      PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
                 aWhichLayer);
    }
  }

#ifdef DEBUG
  if (gLamePaintMetrics) {
    PRTime end = PR_Now();

    PRInt32 numLines = mLines.size();
    if (!numLines) numLines = 1;
    PRTime lines, deltaPerLine, delta;
    LL_I2L(lines, numLines);
    LL_SUB(delta, end, start);
    LL_DIV(deltaPerLine, delta, lines);

    ListTag(stdout);
    char buf[400];
    PR_snprintf(buf, sizeof(buf),
                ": %lld elapsed (%lld per line) lines=%d drawn=%d skip=%d",
                delta, deltaPerLine,
                numLines, drawnLines, numLines - drawnLines);
    printf("%s\n", buf);
  }
#endif
}

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void nsBlockFrame::PaintFloats ( nsPresContext aPresContext,
nsIRenderingContext aRenderingContext,
const nsRect aDirtyRect 
) [protected, inherited]

Definition at line 6429 of file nsBlockFrame.cpp.

{
  for (nsIFrame* floatFrame = mFloats.FirstChild();
       floatFrame;
       floatFrame = floatFrame->GetNextSibling()) {
    PaintChild(aPresContext, aRenderingContext, aDirtyRect,
               floatFrame, NS_FRAME_PAINT_LAYER_BACKGROUND);
    PaintChild(aPresContext, aRenderingContext, aDirtyRect,
               floatFrame, NS_FRAME_PAINT_LAYER_FLOATS);
    PaintChild(aPresContext, aRenderingContext, aDirtyRect,
               floatFrame, NS_FRAME_PAINT_LAYER_FOREGROUND);
  }
}

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void nsBlockFrame::PaintTextDecorationLines ( nsIRenderingContext aRenderingContext,
nscolor  aColor,
nscoord  aOffset,
nscoord  aAscent,
nscoord  aSize 
) [protected, virtual, inherited]

Definition at line 6275 of file nsBlockFrame.cpp.

{
  aRenderingContext.SetColor(aColor);
  for (nsLineList::iterator line = begin_lines(), line_start = line,
         line_end = end_lines(); 
       line != line_end; ++line) {
    if (!line->IsBlock()) {
      nscoord start = line->mBounds.x;
      nscoord width = line->mBounds.width;

      if (line == line_start) {
        // Adjust for the text-indent.  See similar code in
        // nsLineLayout::BeginLineReflow.
        nscoord indent = 0;
        const nsStyleText* styleText = GetStyleText();
        nsStyleUnit unit = styleText->mTextIndent.GetUnit();
        if (eStyleUnit_Coord == unit) {
          indent = styleText->mTextIndent.GetCoordValue();
        } else if (eStyleUnit_Percent == unit) {
          // It's a percentage of the containing block width.
          nsIFrame* containingBlock =
            nsHTMLReflowState::GetContainingBlockFor(this);
          NS_ASSERTION(containingBlock, "Must have containing block!");
          indent = nscoord(styleText->mTextIndent.GetPercentValue() *
                           containingBlock->GetRect().width);
        }

        // Adjust the start position and the width of the decoration by the
        // value of the indent.  Note that indent can be negative; that's OK.
        // It'll just increase the width (which can also happen to be
        // negative!).
        start += indent;
        width -= indent;
      }
      
      // Only paint if we have a positive width
      if (width > 0) {
        aRenderingContext.FillRect(start,
                                   line->mBounds.y + line->GetAscent() - aOffset, 
                                   width, aSize);
      }
    }
  }
}

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PRBool nsMathMLFrame::ParseNamedSpaceValue ( nsIFrame aMathMLmstyleFrame,
nsString aString,
nsCSSValue aCSSValue 
) [static, inherited]

Definition at line 450 of file nsMathMLFrame.cpp.

{
  aCSSValue.Reset();
  aString.CompressWhitespace(); //  aString is not a const in this code...
  if (!aString.Length()) return PR_FALSE;

  // See if it is one of the 'namedspace' (ranging 1/18em...7/18em)
  PRInt32 i = 0;
  nsIAtom* namedspaceAtom = nsnull;
  if (aString.EqualsLiteral("veryverythinmathspace")) {
    i = 1;
    namedspaceAtom = nsMathMLAtoms::veryverythinmathspace_;
  }
  else if (aString.EqualsLiteral("verythinmathspace")) {
    i = 2;
    namedspaceAtom = nsMathMLAtoms::verythinmathspace_;
  }
  else if (aString.EqualsLiteral("thinmathspace")) {
    i = 3;
    namedspaceAtom = nsMathMLAtoms::thinmathspace_;
  }
  else if (aString.EqualsLiteral("mediummathspace")) {
    i = 4;
    namedspaceAtom = nsMathMLAtoms::mediummathspace_;
  }
  else if (aString.EqualsLiteral("thickmathspace")) {
    i = 5;
    namedspaceAtom = nsMathMLAtoms::thickmathspace_;
  }
  else if (aString.EqualsLiteral("verythickmathspace")) {
    i = 6;
    namedspaceAtom = nsMathMLAtoms::verythickmathspace_;
  }
  else if (aString.EqualsLiteral("veryverythickmathspace")) {
    i = 7;
    namedspaceAtom = nsMathMLAtoms::veryverythickmathspace_;
  }

  if (0 != i) {
    if (aMathMLmstyleFrame) {
      // see if there is a <mstyle> that has overriden the default value
      // GetAttribute() will recurse all the way up into the <mstyle> hierarchy
      nsAutoString value;
      if (NS_CONTENT_ATTR_HAS_VALUE ==
          GetAttribute(nsnull, aMathMLmstyleFrame, namedspaceAtom, value)) {
        if (ParseNumericValue(value, aCSSValue) &&
            aCSSValue.IsLengthUnit()) {
          return PR_TRUE;
        }
      }
    }

    // fall back to the default value
    aCSSValue.SetFloatValue(float(i)/float(18), eCSSUnit_EM);
    return PR_TRUE;
  }

  return PR_FALSE;
}

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PRBool nsMathMLFrame::ParseNumericValue ( nsString aString,
nsCSSValue aCSSValue 
) [static, inherited]

Definition at line 354 of file nsMathMLFrame.cpp.

{
  aCSSValue.Reset();
  aString.CompressWhitespace(); //  aString is not a const in this code...

  PRInt32 stringLength = aString.Length();
  if (!stringLength)
    return PR_FALSE;

  nsAutoString number, unit;

  // Gather up characters that make up the number
  PRBool gotDot = PR_FALSE;
  PRUnichar c;
  for (PRInt32 i = 0; i < stringLength; i++) {
    c = aString[i];
    if (gotDot && c == '.')
      return PR_FALSE;  // two dots encountered
    else if (c == '.')
      gotDot = PR_TRUE;
    else if (!nsCRT::IsAsciiDigit(c)) {
      aString.Right(unit, stringLength - i);
      unit.CompressWhitespace(); // some authors leave blanks before the unit
      break;
    }
    number.Append(c);
  }

  // on exit, also return a nicer string version of the value in case
  // the caller wants it (e.g., this removes whitespace before units)
  aString.Assign(number);
  aString.Append(unit);

  // Convert number to floating point
  PRInt32 errorCode;
  float floatValue = number.ToFloat(&errorCode);
  if (errorCode)
    return PR_FALSE;

  nsCSSUnit cssUnit;
  if (unit.IsEmpty()) {
    cssUnit = eCSSUnit_Number; // no explicit unit, this is a number that will act as a multiplier
  }
  else if (unit.EqualsLiteral("%")) {
    aCSSValue.SetPercentValue(floatValue / 100.0f);
    return PR_TRUE;
  }
  else if (unit.EqualsLiteral("em")) cssUnit = eCSSUnit_EM;
  else if (unit.EqualsLiteral("ex")) cssUnit = eCSSUnit_XHeight;
  else if (unit.EqualsLiteral("px")) cssUnit = eCSSUnit_Pixel;
  else if (unit.EqualsLiteral("in")) cssUnit = eCSSUnit_Inch;
  else if (unit.EqualsLiteral("cm")) cssUnit = eCSSUnit_Centimeter;
  else if (unit.EqualsLiteral("mm")) cssUnit = eCSSUnit_Millimeter;
  else if (unit.EqualsLiteral("pt")) cssUnit = eCSSUnit_Point;
  else if (unit.EqualsLiteral("pc")) cssUnit = eCSSUnit_Pica;
  else // unexpected unit
    return PR_FALSE;

  aCSSValue.SetFloatValue(floatValue, cssUnit);
  return PR_TRUE;
}

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NS_IMETHOD nsMathMLFrame::Place ( nsIRenderingContext aRenderingContext,
PRBool  aPlaceOrigin,
nsHTMLReflowMetrics aDesiredSize 
) [inline, virtual, inherited]
PRBool nsBlockFrame::PlaceLine ( nsBlockReflowState aState,
nsLineLayout aLineLayout,
line_iterator  aLine,
PRBool aKeepReflowGoing,
PRBool  aUpdateMaximumWidth 
) [protected, inherited]

Definition at line 4401 of file nsBlockFrame.cpp.

{
  // Trim extra white-space from the line before placing the frames
  aLineLayout.TrimTrailingWhiteSpace();

  // Vertically align the frames on this line.
  //
  // According to the CSS2 spec, section 12.6.1, the "marker" box
  // participates in the height calculation of the list-item box's
  // first line box.
  //
  // There are exactly two places a bullet can be placed: near the
  // first or second line. Its only placed on the second line in a
  // rare case: an empty first line followed by a second line that
  // contains a block (example: <LI>\n<P>... ).
  //
  // For this code, only the first case is possible because this
  // method is used for placing a line of inline frames. If the rare
  // case is happening then the worst that will happen is that the
  // bullet frame will be reflowed twice.
  PRBool addedBullet = PR_FALSE;
  if (mBullet && HaveOutsideBullet() && (aLine == mLines.front()) &&
      (!aLineLayout.IsZeroHeight() || (aLine == mLines.back()))) {
    nsHTMLReflowMetrics metrics(nsnull);
    ReflowBullet(aState, metrics);
    aLineLayout.AddBulletFrame(mBullet, metrics);
    addedBullet = PR_TRUE;
  }
  nscoord maxElementWidth;
  aLineLayout.VerticalAlignLine(aLine, &maxElementWidth);
  // Our ascent is the ascent of our first line (but if this line is all
  // whitespace we'll correct things in |ReflowBlockFrame|).
  if (aLine == mLines.front()) {
    mAscent = aLine->mBounds.y + aLine->GetAscent();
  }

  // See if we're shrink wrapping the width
  if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
    // XXXldb Do we really still want to do this?
    // When determining the line's width we also need to include any
    // right floats that impact us. This represents the shrink wrap
    // width of the line
    if (aState.IsImpactedByFloat() && !aLine->IsLineWrapped()) {
      NS_ASSERTION(aState.mContentArea.width >= aState.mAvailSpaceRect.XMost(), "bad state");
      aLine->mBounds.width += aState.mContentArea.width - aState.mAvailSpaceRect.XMost();
    }
  }
#ifdef DEBUG
  {
    static nscoord lastHeight = 0;
    if (CRAZY_HEIGHT(aLine->mBounds.y)) {
      lastHeight = aLine->mBounds.y;
      if (abs(aLine->mBounds.y - lastHeight) > CRAZY_H/10) {
        nsFrame::ListTag(stdout);
        printf(": line=%p y=%d line.bounds.height=%d\n",
               NS_STATIC_CAST(void*, aLine.get()),
               aLine->mBounds.y, aLine->mBounds.height);
      }
    }
    else {
      lastHeight = 0;
    }
  }
#endif

  // Only block frames horizontally align their children because
  // inline frames "shrink-wrap" around their children (therefore
  // there is no extra horizontal space).
  const nsStyleText* styleText = GetStyleText();
  PRBool allowJustify = NS_STYLE_TEXT_ALIGN_JUSTIFY == styleText->mTextAlign &&
                        !aLineLayout.GetLineEndsInBR() &&
                        ShouldJustifyLine(aState, aLine);
  PRBool successful = aLineLayout.HorizontalAlignFrames(aLine->mBounds,
                            allowJustify, aState.GetFlag(BRS_SHRINKWRAPWIDTH));
  // XXX: not only bidi: right alignment can be broken after
  // RelativePositionFrames!!!
  // XXXldb Is something here considering relatively positioned frames at
  // other than their original positions?
  if (!successful) {
    // Mark the line dirty and then later once we've determined the width
    // we can do the horizontal alignment
    aLine->MarkDirty();
    aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
  }
#ifdef IBMBIDI
  // XXXldb Why don't we do this earlier?
  else {
    if (aState.mPresContext->BidiEnabled()) {
      if (!aState.mPresContext->IsVisualMode()) {
        nsBidiPresUtils* bidiUtils = aState.mPresContext->GetBidiUtils();

        if (bidiUtils && bidiUtils->IsSuccessful() ) {
          nsIFrame* nextInFlow = (aLine.next() != end_lines())
                                 ? aLine.next()->mFirstChild : nsnull;

          bidiUtils->ReorderFrames(aState.mPresContext,
                                   aState.mReflowState.rendContext,
                                   aLine->mFirstChild, nextInFlow,
                                   aLine->GetChildCount() );
        } // bidiUtils
      } // not visual mode
    } // bidi enabled
  } // successful
#endif // IBMBIDI

  nsRect combinedArea;
  aLineLayout.RelativePositionFrames(combinedArea);  // XXXldb This returned width as -15, 2001-06-12, Bugzilla
  aLine->SetCombinedArea(combinedArea);
  if (addedBullet) {
    aLineLayout.RemoveBulletFrame(mBullet);
  }

  // Inline lines do not have margins themselves; however they are
  // impacted by prior block margins. If this line ends up having some
  // height then we zero out the previous bottom margin value that was
  // already applied to the line's starting Y coordinate. Otherwise we
  // leave it be so that the previous blocks bottom margin can be
  // collapsed with a block that follows.
  nscoord newY;

  if (!aLine->CachedIsEmpty()) {
    // This line has some height. Therefore the application of the
    // previous-bottom-margin should stick.
    aState.mPrevBottomMargin.Zero();
    newY = aLine->mBounds.YMost();
  }
  else {
    // Don't let the previous-bottom-margin value affect the newY
    // coordinate (it was applied in ReflowInlineFrames speculatively)
    // since the line is empty.
    // We already called |ShouldApplyTopMargin|, and if we applied it
    // then BRS_APPLYTOPMARGIN is set.
    nscoord dy = aState.GetFlag(BRS_APPLYTOPMARGIN)
                   ? -aState.mPrevBottomMargin.get() : 0;
    newY = aState.mY + dy;
    aLine->SlideBy(dy); // XXXldb Do we really want to do this?
    // keep our ascent in sync
    // XXXldb If it's empty, shouldn't the next line control the ascent?
    if (mLines.front() == aLine) {
      mAscent += dy;
    }
  }

  // See if the line fit. If it doesn't we need to push it. Our first
  // line will always fit.

  // If we're just updating the maximum width then we don't care if it
  // fits; we'll assume it does, so that the maximum width will get
  // updated below. The line will be reflowed again and pushed then
  // if necessary.
  if (mLines.front() != aLine &&
      newY > aState.mBottomEdge &&
      aState.mBottomEdge != NS_UNCONSTRAINEDSIZE &&
      !aUpdateMaximumWidth) {
    // Push this line and all of it's children and anything else that
    // follows to our next-in-flow
    NS_ASSERTION((aState.mCurrentLine == aLine), "oops");
    PushLines(aState, aLine.prev());

    // Stop reflow and whack the reflow status if reflow hasn't
    // already been stopped.
    if (*aKeepReflowGoing) {
      aState.mReflowStatus |= NS_FRAME_NOT_COMPLETE;
      *aKeepReflowGoing = PR_FALSE;
    }
    return PR_TRUE;
  }

  // May be needed below
  PRBool wasAdjacentWIthTop = aState.IsAdjacentWithTop();

  aState.mY = newY;
  
  // If we're reflowing the line just to incrementally update the
  // maximum width, then don't post-place the line. It's doing work we
  // don't need, and it will update things like aState.mKidXMost that
  // we don't want updated...
  if (aUpdateMaximumWidth) {
    // However, we do need to update the max-element-width if requested
    if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
      aState.UpdateMaxElementWidth(maxElementWidth);
      // We also cache the max element width in the line. This is needed for
      // incremental reflow
      aLine->mMaxElementWidth = maxElementWidth;
#ifdef DEBUG
      if (gNoisyMaxElementWidth) {
        IndentBy(stdout, gNoiseIndent);
        printf ("nsBlockFrame::PlaceLine: %p setting MEW for line %p to %d\n", 
                NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine.get()),
                maxElementWidth);
      }
#endif
    }

  } else {
    PostPlaceLine(aState, aLine, maxElementWidth);
  }

  // Add the already placed current-line floats to the line
  aLine->AppendFloats(aState.mCurrentLineFloats);

  // Any below current line floats to place?
  if (aState.mBelowCurrentLineFloats.NotEmpty()) {
    // Reflow the below-current-line floats, then add them to the
    // lines float list if there aren't any truncated floats.
    if (aState.PlaceBelowCurrentLineFloats(aState.mBelowCurrentLineFloats,
                                           wasAdjacentWIthTop)) {
      aLine->AppendFloats(aState.mBelowCurrentLineFloats);
    }
    else { 
      // At least one float is truncated, so fix up any placeholders that got split and 
      // push the line. XXX It may be better to put the float on the next line, but this 
      // is not common enough to justify the complexity. Or maybe it is now...

      // If we just want to calculate the maximum width, then don't push the line.
      // We'll reflow it again and then it will get pushed if necessary.
      if (!aUpdateMaximumWidth) {
        nsIFrame* lastPlaceholder = aState.mOverflowPlaceholders.LastChild();
        PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
      }
    }
  }

  // When a line has floats, factor them into the combined-area
  // computations.
  if (aLine->HasFloats()) {
    // Combine the float combined area (stored in aState) and the
    // value computed by the line layout code.
    nsRect lineCombinedArea(aLine->GetCombinedArea());
#ifdef NOISY_COMBINED_AREA
    ListTag(stdout);
    printf(": lineCA=%d,%d,%d,%d floatCA=%d,%d,%d,%d\n",
           lineCombinedArea.x, lineCombinedArea.y,
           lineCombinedArea.width, lineCombinedArea.height,
           aState.mFloatCombinedArea.x, aState.mFloatCombinedArea.y,
           aState.mFloatCombinedArea.width,
           aState.mFloatCombinedArea.height);
#endif
    lineCombinedArea.UnionRect(aState.mFloatCombinedArea, lineCombinedArea);

    aLine->SetCombinedArea(lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
    printf("  ==> final lineCA=%d,%d,%d,%d\n",
           lineCombinedArea.x, lineCombinedArea.y,
           lineCombinedArea.width, lineCombinedArea.height);
#endif
  }

  // Apply break-after clearing if necessary
  // This must stay in sync with |ReflowDirtyLines|.
  if (aLine->HasFloatBreakAfter()) {
    aState.mY = aState.ClearFloats(aState.mY, aLine->GetBreakTypeAfter());
  }

  return PR_FALSE;
}

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void nsBlockFrame::PostPlaceLine ( nsBlockReflowState aState,
nsLineBox aLine,
nscoord  aMaxElementWidth 
) [protected, inherited]

Definition at line 4663 of file nsBlockFrame.cpp.

{
  // Update max-element-width
  if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
    aState.UpdateMaxElementWidth(aMaxElementWidth);
    // We also cache the max element width in the line. This is needed for
    // incremental reflow
    aLine->mMaxElementWidth = aMaxElementWidth;
#ifdef DEBUG
    if (gNoisyMaxElementWidth) {
      IndentBy(stdout, gNoiseIndent);
      printf ("nsBlockFrame::PostPlaceLine: %p setting line %p MEW %d\n", 
              NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine),
              aMaxElementWidth);
    }
#endif
  }

  // If this is an unconstrained reflow, then cache the line width in the
  // line. We'll need this during incremental reflow if we're asked to
  // calculate the maximum width
  if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)) {
#ifdef NOISY_MAXIMUM_WIDTH
    printf("nsBlockFrame::PostPlaceLine during UC Reflow of block %p line %p caching max width %d\n", 
           NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine),
           aLine->mBounds.XMost());
#endif
    aLine->mMaximumWidth = aLine->mBounds.XMost();
  }

  // Update xmost
  nscoord xmost = aLine->mBounds.XMost();

#ifdef DEBUG
  if (CRAZY_WIDTH(xmost)) {
    ListTag(stdout);
    printf(": line=%p xmost=%d\n", NS_STATIC_CAST(void*, aLine), xmost);
  }
#endif
  if (xmost > aState.mKidXMost) {
    aState.mKidXMost = xmost;
#ifdef NOISY_KIDXMOST
    printf("%p PostPlaceLine aState.mKidXMost=%d\n", this, aState.mKidXMost); 
#endif
  }
}

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set up the conditions necessary for an incremental reflow.

the primary task is to mark the minimumly sufficient lines dirty.

Definition at line 1577 of file nsBlockFrame.cpp.

{
  // XXXwaterson this is non-optimal. We'd rather do this in
  // ReflowDirtyLines; however, I'm not quite ready to figure out how
  // to deal with reflow path retargeting yet.
  nsReflowPath *path = aState.mReflowState.path;

  nsReflowPath::iterator iter = path->FirstChild();
  nsReflowPath::iterator end = path->EndChildren();

  for ( ; iter != end; ++iter) {
    // Determine the line being impacted
    line_iterator line = FindLineFor(*iter);
    if (line == end_lines()) {
      // This assertion actually fires on lots of pages
      // (e.g., bugzilla, bugzilla query page), so limit it
      // to a few people until we fix the problem causing it.
      //
      // I think waterson explained once why it was happening -- I think
      // it has something to do with the interaction of the unconstrained
      // reflow in multi-pass reflow with the reflow command's chain, but
      // I don't remember the details.
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
      NS_NOTREACHED("We don't have a line for the target of the reflow.  "
                    "Being inefficient");
#endif
      // This can't happen, but just in case it does...
      PrepareResizeReflow(aState);
      continue;
    }

    if (line->IsInline()) {
      if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
        // We've been asked to compute the maximum width of the block
        // frame, which ReflowLine() will handle by performing an
        // unconstrained reflow on the line. If this incremental
        // reflow is targeted at a continuing frame, we may have to
        // retarget it, as the unconstrained reflow can destroy some
        // of the continuations. This will allow the incremental
        // reflow to arrive at the target frame during the first-pass
        // unconstrained reflow.
        nsIFrame *prevInFlow = (*iter)->GetPrevInFlow();
        if (prevInFlow)
          RetargetInlineIncrementalReflow(iter, line, prevInFlow);
      }
    }

    // Mark this line dirty.  We need to mark the previous line dirty
    // if it is an inline line so that it can maybe pull up something
    // from the just affected line.
    MarkLineDirty(line);
  }
  return NS_OK;
}

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nsresult nsBlockFrame::PrepareInitialReflow ( nsBlockReflowState aState) [protected, inherited]

set up the conditions necessary for an initial reflow

Definition at line 1570 of file nsBlockFrame.cpp.

{
  PrepareResizeReflow(aState);
  return NS_OK;
}

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nsresult nsBlockFrame::PrepareResizeReflow ( nsBlockReflowState aState) [protected, inherited]

set up the conditions necessary for an resize reflow the primary task is to mark the minimumly sufficient lines dirty.

Definition at line 1844 of file nsBlockFrame.cpp.

{
  // See if we can try and avoid marking all the lines as dirty
  PRBool  tryAndSkipLines = PR_FALSE;

  // we need to calculate if any part of then block itself 
  // is impacted by a float (bug 19579)
  aState.GetAvailableSpace();

  // See if this is a constrained resize reflow that is not impacted by floats
  if ((! aState.IsImpactedByFloat()) &&
      (aState.mReflowState.reason == eReflowReason_Resize) &&
      (NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableWidth)) {

    // If the text is left-aligned, then we try and avoid reflowing the lines
    const nsStyleText* styleText = GetStyleText();

    if ((NS_STYLE_TEXT_ALIGN_LEFT == styleText->mTextAlign) ||
        ((NS_STYLE_TEXT_ALIGN_DEFAULT == styleText->mTextAlign) &&
         (NS_STYLE_DIRECTION_LTR == aState.mReflowState.mStyleVisibility->mDirection))) {
      tryAndSkipLines = PR_TRUE;
    }
  }

#ifdef DEBUG
  if (gDisableResizeOpt) {
    tryAndSkipLines = PR_FALSE;
  }
  if (gNoisyReflow) {
    if (!tryAndSkipLines) {
      const nsStyleText* styleText = GetStyleText();
      IndentBy(stdout, gNoiseIndent);
      ListTag(stdout);
      printf(": marking all lines dirty: reason=%d availWidth=%d textAlign=%d\n",
             aState.mReflowState.reason,
             aState.mReflowState.availableWidth,
             styleText->mTextAlign);
    }
  }
#endif

  if (tryAndSkipLines) {
    nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left;
     
    if (NS_SHRINKWRAPWIDTH == aState.mReflowState.mComputedWidth) {
      if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedMaxWidth) {
        newAvailWidth += aState.mReflowState.mComputedMaxWidth;
      }
      else {
        newAvailWidth += aState.mReflowState.availableWidth;
      }
    } else {
      if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedWidth) {
        newAvailWidth += aState.mReflowState.mComputedWidth;
      }
      else {
        newAvailWidth += aState.mReflowState.availableWidth;
      }
    }
    NS_ASSERTION(NS_UNCONSTRAINEDSIZE != newAvailWidth, "bad math, newAvailWidth is infinite");

#ifdef DEBUG
    if (gNoisyReflow) {
      IndentBy(stdout, gNoiseIndent);
      ListTag(stdout);
      printf(": trying to avoid marking all lines dirty\n");
    }
#endif

    for (line_iterator line = begin_lines(), line_end = end_lines();
         line != line_end;
         ++line)
    {
      // We let child blocks make their own decisions the same
      // way we are here.
      if (line->IsBlock() ||
          // XXXldb We need HasPercentageDescendant, not HasPercentageChild!!!
          line->HasPercentageChild() || 
          line->HasFloats() ||
          (line != mLines.back() && !line->HasBreakAfter()) ||
          line->ResizeReflowOptimizationDisabled() ||
          line->IsImpactedByFloat() ||
          (line->mBounds.XMost() > newAvailWidth)) {
        line->MarkDirty();
      }

#ifdef REALLY_NOISY_REFLOW
      if (!line->IsBlock()) {
        printf("PrepareResizeReflow thinks line %p is %simpacted by floats\n", 
               line.get(), line->IsImpactedByFloat() ? "" : "not ");
      }
#endif
#ifdef DEBUG
      if (gNoisyReflow && !line->IsDirty()) {
        IndentBy(stdout, gNoiseIndent + 1);
        printf("skipped: line=%p next=%p %s %s%s%s breakTypeBefore/After=%d/%d xmost=%d\n",
           NS_STATIC_CAST(void*, line.get()),
           NS_STATIC_CAST(void*, (line.next() != end_lines() ? line.next().get() : nsnull)),
           line->IsBlock() ? "block" : "inline",
           line->HasBreakAfter() ? "has-break-after " : "",
           line->HasFloats() ? "has-floats " : "",
           line->IsImpactedByFloat() ? "impacted " : "",
           line->GetBreakTypeBefore(), line->GetBreakTypeAfter(),
           line->mBounds.XMost());
      }
#endif
    }
  }
  else {
    // Mark everything dirty
    for (line_iterator line = begin_lines(), line_end = end_lines();
         line != line_end;
         ++line)
    {
      line->MarkDirty();
    }
  }
  return NS_OK;
}

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set up the conditions necessary for an styleChanged reflow

Definition at line 1829 of file nsBlockFrame.cpp.

{
  nsresult rv = UpdateBulletPosition(aState);

  // Mark everything dirty
  for (line_iterator line = begin_lines(), line_end = end_lines();
       line != line_end;
       ++line)
  {
    line->MarkDirty();
  }
  return rv;
}

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void nsBlockFrame::PropagateFloatDamage ( nsBlockReflowState aState,
nsLineBox aLine,
nscoord  aDeltaY 
) [protected, inherited]

Propagate reflow "damage" from from earlier lines to the current line.

The reflow damage comes from the following sources:

  1. The regions of float damage remembered during reflow.
  2. The combination of nonzero |aDeltaY| and any impact by a float, either the previous reflow or now.

When entering this function, |aLine| is still at its old position and |aDeltaY| indicates how much it will later be slid (assuming it doesn't get marked dirty and reflowed entirely).

Definition at line 2012 of file nsBlockFrame.cpp.

{
  NS_PRECONDITION(!aLine->IsDirty(), "should never be called on dirty lines");

  // Check the damage region recorded in the float damage.
  nsSpaceManager *spaceManager = aState.mReflowState.mSpaceManager;
  if (spaceManager->HasFloatDamage()) {
    nscoord lineYA = aLine->mBounds.y + aDeltaY;
    nscoord lineYB = lineYA + aLine->mBounds.height;
    if (spaceManager->IntersectsDamage(lineYA, lineYB)) {
      aLine->MarkDirty();
      return;
    }
  }

  if (aDeltaY) {
    // Cases we need to find:
    //
    // 1. the line was impacted by a float and now isn't
    // 2. the line wasn't impacted by a float and now is
    // 3. the line is impacted by a float both before and after and 
    //    the float has changed position relative to the line (or it's
    //    a different float).  (XXXPerf we don't currently
    //    check whether the float changed size.  We currently just
    //    mark blocks dirty and ignore any possibility of damage to
    //    inlines by it being a different float with a different
    //    size.)
    //
    //    XXXPerf: An optimization: if the line was and is completely
    //    impacted by a float and the float hasn't changed size,
    //    then we don't need to mark the line dirty.
    aState.GetAvailableSpace(aLine->mBounds.y + aDeltaY, PR_FALSE);
    PRBool wasImpactedByFloat = aLine->IsImpactedByFloat();
    PRBool isImpactedByFloat = aState.IsImpactedByFloat();
#ifdef REALLY_NOISY_REFLOW
    printf("nsBlockFrame::PropagateFloatDamage %p was = %d, is=%d\n", 
       this, wasImpactedByFloat, isImpactedByFloat);
#endif
    // Mark the line dirty if:
    //  1. It used to be impacted by a float and now isn't, or vice
    //     versa.
    //  2. It is impacted by a float and it is a block, which means
    //     that more or less of the line could be impacted than was in
    //     the past.  (XXXPerf This could be optimized further, since
    //     we're marking the whole line dirty.)
    if ((wasImpactedByFloat != isImpactedByFloat) ||
        (isImpactedByFloat && aLine->IsBlock())) {
      aLine->MarkDirty();
    }
  }
}

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nsresult nsBlockFrame::PullFrame ( nsBlockReflowState aState,
line_iterator  aLine,
PRBool  aDamageDeletedLine,
nsIFrame *&  aFrameResult 
) [protected, inherited]

Pull frame from the next available location (one of our lines or one of our next-in-flows lines).

Definition at line 2823 of file nsBlockFrame.cpp.

{
  aFrameResult = nsnull;

  // First check our remaining lines
  if (end_lines() != aLine.next()) {
#ifdef DEBUG
    PRBool retry =
#endif
      PullFrameFrom(aState, aLine, this, PR_FALSE, aLine.next(),
                    aDamageDeletedLines, aFrameResult);
    NS_ASSERTION(!retry, "Shouldn't have to retry in the current block");
    return NS_OK;
  }

  NS_ASSERTION(!GetOverflowLines(),
    "Our overflow lines should have been removed at the start of reflow");

  // Try each next in flows
  nsBlockFrame* nextInFlow = aState.mNextInFlow;
  while (nextInFlow) {
    // first normal lines, then overflow lines
    if (!nextInFlow->mLines.empty()) {
      if (PullFrameFrom(aState, aLine, nextInFlow, PR_FALSE,
                        nextInFlow->mLines.begin(),
                        aDamageDeletedLines, aFrameResult)) {
        // try again with the same value of nextInFlow
        continue;
      }
      break;
    }

    nsLineList* overflowLines = nextInFlow->GetOverflowLines();
    if (overflowLines) {
      if (PullFrameFrom(aState, aLine, nextInFlow, PR_TRUE,
                        overflowLines->begin(),
                        aDamageDeletedLines, aFrameResult)) {
        // try again with the same value of nextInFlow
        continue;
      }
      break;
    }

    nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
    aState.mNextInFlow = nextInFlow;
  }

  return NS_OK;
}

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PRBool nsBlockFrame::PullFrameFrom ( nsBlockReflowState aState,
nsLineBox aLine,
nsBlockFrame aFromContainer,
PRBool  aFromOverflowLine,
nsLineList::iterator  aFromLine,
PRBool  aDamageDeletedLines,
nsIFrame *&  aFrameResult 
) [protected, inherited]

Try to pull a frame out of a line pointed at by aFromLine.

If aUpdateGeometricParent is set then the pulled frames geometric parent will be updated (e.g. when pulling from a next-in-flows line list).

Note: pulling a frame from a line that is a place-holder frame doesn't automatically remove the corresponding float from the line's float array. This happens indirectly: either the line gets emptied (and destroyed) or the line gets reflowed (because we mark it dirty) and the code at the top of ReflowLine empties the array. So eventually, it will be removed, just not right away.

Returns:
PR_TRUE to force retrying of the pull.

Definition at line 2891 of file nsBlockFrame.cpp.

{
  nsLineBox* fromLine = aFromLine;
  NS_ABORT_IF_FALSE(fromLine, "bad line to pull from");
  NS_ABORT_IF_FALSE(fromLine->GetChildCount(), "empty line");
  NS_ABORT_IF_FALSE(aLine->GetChildCount(), "empty line");

  NS_ASSERTION(fromLine->IsBlock() == fromLine->mFirstChild->GetStyleDisplay()->IsBlockLevel(),
               "Disagreement about whether it's a block or not");

  if (fromLine->IsBlock()) {
    // If our line is not empty and the child in aFromLine is a block
    // then we cannot pull up the frame into this line. In this case
    // we stop pulling.
    aFrameResult = nsnull;
  }
  else {
    // Take frame from fromLine
    nsIFrame* frame = fromLine->mFirstChild;

    if (aFromContainer != this) {
      if (HandleOverflowPlaceholdersForPulledFrame(aState, frame)) {
        // we lost this one, retry
        return PR_TRUE;
      }

      aLine->LastChild()->SetNextSibling(frame);
    }
    // when aFromContainer is 'this', then aLine->LastChild()'s next sibling
    // is already set correctly.
    aLine->SetChildCount(aLine->GetChildCount() + 1);
      
    PRInt32 fromLineChildCount = fromLine->GetChildCount();
    if (0 != --fromLineChildCount) {
      // Mark line dirty now that we pulled a child
      fromLine->SetChildCount(fromLineChildCount);
      fromLine->MarkDirty();
      fromLine->mFirstChild = frame->GetNextSibling();
    }
    else {
      // Free up the fromLine now that it's empty
      // Its bounds might need to be redrawn, though.
      // XXX WHY do we invalidate the bounds AND the combined area? doesn't
      // the combined area always enclose the bounds?
      if (aDamageDeletedLines) {
        Invalidate(fromLine->mBounds);
      }
      nsLineList* fromLineList = aFromOverflowLine
        ? aFromContainer->RemoveOverflowLines()
        : &aFromContainer->mLines;
      if (aFromLine.next() != fromLineList->end())
        aFromLine.next()->MarkPreviousMarginDirty();

      Invalidate(fromLine->GetCombinedArea());
      fromLineList->erase(aFromLine);
      // Note that aFromLine just got incremented, so don't use it again here!
      aState.FreeLineBox(fromLine);

      // Put any remaining overflow lines back.
      if (aFromOverflowLine && !fromLineList->empty()) {
        aFromContainer->SetOverflowLines(fromLineList);
      }
    }

    // Change geometric parents
    if (aFromContainer != this) {
      // When pushing and pulling frames we need to check for whether any
      // views need to be reparented
      NS_ASSERTION(frame->GetParent() == aFromContainer, "unexpected parent frame");

      ReparentFrame(frame, aFromContainer, this);

      // The frame is being pulled from a next-in-flow; therefore we
      // need to add it to our sibling list.
      frame->SetNextSibling(nsnull);
      if (nsnull != aState.mPrevChild) {
        aState.mPrevChild->SetNextSibling(frame);
      }

      // The frame might have (or contain) floats that need to be
      // brought over too.
      ReparentFloats(frame, aFromContainer, aFromOverflowLine, PR_TRUE);
    }

    // Stop pulling because we found a frame to pull
    aFrameResult = frame;
#ifdef DEBUG
    VerifyLines(PR_TRUE);
#endif
  }
  return PR_FALSE;
}

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void nsBlockFrame::PushLines ( nsBlockReflowState aState,
nsLineList::iterator  aLineBefore 
) [protected, inherited]

Definition at line 4713 of file nsBlockFrame.cpp.

{
  nsLineList::iterator overBegin(aLineBefore.next());

  // PushTruncatedPlaceholderLine sometimes pushes the first line.  Ugh.
  PRBool firstLine = overBegin == begin_lines();

  if (overBegin != end_lines()) {
    // Remove floats in the lines from mFloats
    nsFrameList floats;
    nsIFrame* tail = nsnull;
    CollectFloats(overBegin->mFirstChild, floats, &tail, PR_FALSE, PR_TRUE);

    if (floats.NotEmpty()) {
      // Push the floats onto the front of the overflow out-of-flows list
      nsFrameList oofs = GetOverflowOutOfFlows();
      if (oofs.NotEmpty()) {
        floats.InsertFrames(nsnull, tail, oofs.FirstChild());
      }
      SetOverflowOutOfFlows(floats);
    }

    // overflow lines can already exist in some cases, in particular,
    // when shrinkwrapping and we discover that the shrinkwap causes
    // the height of some child block to grow which creates additional
    // overflowing content. In such cases we must prepend the new
    // overflow to the existing overflow.
    nsLineList* overflowLines = RemoveOverflowLines();
    if (!overflowLines) {
      // XXXldb use presshell arena!
      overflowLines = new nsLineList();
    }
    if (overflowLines) {
      if (!overflowLines->empty()) {
        mLines.back()->LastChild()->SetNextSibling(overflowLines->front()->mFirstChild);
      }
      overflowLines->splice(overflowLines->begin(), mLines, overBegin,
                            end_lines());
      NS_ASSERTION(!overflowLines->empty(), "should not be empty");
      // this takes ownership but it won't delete it immediately so we
      // can keep using it.
      SetOverflowLines(overflowLines);
  
      // Mark all the overflow lines dirty so that they get reflowed when
      // they are pulled up by our next-in-flow.

      // XXXldb Can this get called O(N) times making the whole thing O(N^2)?
      for (line_iterator line = overflowLines->begin(),
             line_end = overflowLines->end();
           line != line_end;
           ++line)
        {
          line->MarkDirty();
          line->MarkPreviousMarginDirty();
          line->mBounds.SetRect(0, 0, 0, 0);
          if (line->HasFloats()) {
            line->FreeFloats(aState.mFloatCacheFreeList);
          }
        }
    }
  }

  // Break frame sibling list
  if (!firstLine)
    aLineBefore->LastChild()->SetNextSibling(nsnull);

#ifdef DEBUG
  VerifyOverflowSituation();
#endif
}

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void nsBlockFrame::PushTruncatedPlaceholderLine ( nsBlockReflowState aState,
line_iterator  aLine,
nsIFrame aLastPlaceholder,
PRBool aKeepReflowGoing 
) [protected, inherited]

Definition at line 3812 of file nsBlockFrame.cpp.

{
  UndoSplitPlaceholders(aState, aLastPlaceholder);

  line_iterator prevLine = aLine;
  --prevLine;
  PushLines(aState, prevLine);
  aKeepReflowGoing = PR_FALSE;
  aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}

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