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gecko-dev/layout/generic/nsBlockReflowState.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Steve Clark <buster@netscape.com>
* Robert O'Callahan <roc+moz@cs.cmu.edu>
*/
#include "nsCOMPtr.h"
#include "nsBlockFrame.h"
#include "nsBlockReflowContext.h"
#include "nsBlockBandData.h"
#include "nsBulletFrame.h"
#include "nsLineBox.h"
#include "nsInlineFrame.h"
#include "nsLineLayout.h"
#include "nsPlaceholderFrame.h"
#include "nsStyleConsts.h"
#include "nsHTMLIIDs.h"
#include "nsCSSRendering.h"
#include "nsIFrameManager.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIReflowCommand.h"
#include "nsISpaceManager.h"
#include "nsIStyleContext.h"
#include "nsIView.h"
#include "nsIFontMetrics.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLValue.h"
#include "nsDOMEvent.h"
#include "nsIHTMLContent.h"
#include "prprf.h"
#include "nsLayoutAtoms.h"
#include "nsITextContent.h"
#include "nsStyleChangeList.h"
#include "nsISizeOfHandler.h"
#include "nsIFocusTracker.h"
#include "nsIFrameSelection.h"
#include "nsSpaceManager.h"
#include "prenv.h"
#include "plstr.h"
#ifdef DEBUG
static PRBool gLamePaintMetrics;
static PRBool gLameReflowMetrics;
static PRBool gNoisy;
static PRBool gNoisyDamageRepair;
static PRBool gNoisyMaxElementSize;
static PRBool gNoisyReflow;
static PRBool gReallyNoisyReflow;
static PRBool gNoisySpaceManager;
static PRBool gVerifyLines;
static PRBool gDisableResizeOpt;
struct BlockDebugFlags {
const char* name;
PRBool* on;
};
static BlockDebugFlags gFlags[] = {
{ "reflow", &gNoisyReflow },
{ "really-noisy-reflow", &gReallyNoisyReflow },
{ "max-element-size", &gNoisyMaxElementSize },
{ "space-manager", &gNoisySpaceManager },
{ "verify-lines", &gVerifyLines },
{ "damage-repair", &gNoisyDamageRepair },
{ "lame-paint-metrics", &gLamePaintMetrics },
{ "lame-reflow-metrics", &gLameReflowMetrics },
{ "disable-resize-opt", &gDisableResizeOpt },
};
#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowDebugFlags()
{
printf("Here are the available GECKO_BLOCK_DEBUG_FLAGS:\n");
BlockDebugFlags* bdf = gFlags;
BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
for (; bdf < end; bdf++) {
printf(" %s\n", bdf->name);
}
printf("Note: GECKO_BLOCK_DEBUG_FLAGS is a comma seperated list of flag\n");
printf("names (no whitespace)\n");
}
static void
InitDebugFlags()
{
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_BLOCK_DEBUG_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* cm = PL_strchr(flags, ',');
if (cm) *cm = '\0';
PRBool found = PR_FALSE;
BlockDebugFlags* bdf = gFlags;
BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
for (; bdf < end; bdf++) {
if (PL_strcasecmp(bdf->name, flags) == 0) {
*(bdf->on) = PR_TRUE;
printf("nsBlockFrame: setting %s debug flag on\n", bdf->name);
gNoisy = PR_TRUE;
found = PR_TRUE;
break;
}
}
if (!found) {
error = PR_TRUE;
}
if (!cm) break;
*cm = ',';
flags = cm + 1;
}
if (error) {
ShowDebugFlags();
}
}
}
}
#undef NOISY_FIRST_LINE // enables debug output for first-line specific layout
#undef REALLY_NOISY_FIRST_LINE // enables extra debug output for first-line specific layout
#undef NOISY_FIRST_LETTER // enables debug output for first-letter specific layout
#undef NOISY_MAX_ELEMENT_SIZE // enables debug output for max element size computation
#undef NOISY_MAXIMUM_WIDTH // enables debug output for max width computation
#undef NOISY_KIDXMOST // enables debug output for aState.mKidXMost computation
#undef NOISY_FLOATER // enables debug output for floater reflow (the in/out metrics for the floated block)
#undef NOISY_FLOATER_CLEARING
#undef NOISY_FINAL_SIZE // enables debug output for desired width/height computation, once all children have been reflowed
#undef NOISY_REMOVE_FRAME
#undef NOISY_COMBINED_AREA // enables debug output for combined area computation
#undef NOISY_VERTICAL_MARGINS
#undef NOISY_REFLOW_REASON // gives a little info about why each reflow was requested
#undef REFLOW_STATUS_COVERAGE // I think this is most useful for printing, to see which frames return "incomplete"
#undef NOISY_SPACEMANAGER // enables debug output for space manager use, useful for analysing reflow of floaters and positioned elements
#undef NOISY_BLOCK_INVALIDATE // enables debug output for all calls to invalidate
#endif
#define FIX_BUG_38157
#define FIX_BUG_37657
// add in a sanity check for absurdly deep frame trees. See bug 42138
// can't just use IsFrameTreeTooDeep() because that method has side effects we don't want
#define MAX_DEPTH_FOR_LIST_RENUMBERING 200 // 200 open displayable tags is pretty unrealistic
//----------------------------------------------------------------------
// Debugging support code
#ifdef DEBUG
static PRInt32 gNoiseIndent;
static const char* kReflowCommandType[] = {
"ContentChanged",
"StyleChanged",
"PullupReflow",
"PushReflow",
"CheckPullupReflow",
"ReflowDirty",
"UserDefined",
};
#endif
#ifdef REALLY_NOISY_FIRST_LINE
static void
DumpStyleGeneaology(nsIFrame* aFrame, const char* gap)
{
fputs(gap, stdout);
nsFrame::ListTag(stdout, aFrame);
printf(": ");
nsIStyleContext* sc;
aFrame->GetStyleContext(&sc);
while (nsnull != sc) {
nsIStyleContext* psc;
printf("%p ", sc);
psc = sc->GetParent();
NS_RELEASE(sc);
sc = psc;
}
printf("\n");
}
#endif
#ifdef REFLOW_STATUS_COVERAGE
static void
RecordReflowStatus(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
{
static PRUint32 record[2];
// 0: child-is-block
// 1: child-is-inline
PRIntn index = 0;
if (!aChildIsBlock) index |= 1;
// Compute new status
PRUint32 newS = record[index];
if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
newS |= 1;
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 2;
}
else {
newS |= 4;
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 8;
}
else {
newS |= 16;
}
// Log updates to the status that yield different values
if (record[index] != newS) {
record[index] = newS;
printf("record(%d): %02x %02x\n", index, record[0], record[1]);
}
}
#endif
//----------------------------------------------------------------------
inline void CombineRects(const nsRect& r1, nsRect& r2)
{
nscoord xa = r2.x;
nscoord ya = r2.y;
nscoord xb = xa + r2.width;
nscoord yb = ya + r2.height;
nscoord x = r1.x;
nscoord y = r1.y;
nscoord xmost = x + r1.width;
nscoord ymost = y + r1.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
r2.x = xa;
r2.y = ya;
r2.width = xb - xa;
r2.height = yb - ya;
}
//----------------------------------------------------------------------
class nsBlockReflowState {
public:
nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsIPresContext* aPresContext,
nsBlockFrame* aFrame,
const nsHTMLReflowMetrics& aMetrics,
PRBool aBlockMarginRoot);
~nsBlockReflowState();
/**
* Update our state when aLine is skipped over during incremental
* reflow.
*/
void RecoverStateFrom(nsLineBox* aLine, PRBool aPrevLineWasClean);
/**
* Get the available reflow space for the current y coordinate. The
* available space is relative to our coordinate system (0,0) is our
* upper left corner.
*/
void GetAvailableSpace() {
#ifdef DEBUG
// Verify that the caller setup the coordinate system properly
nscoord wx, wy;
mSpaceManager->GetTranslation(wx, wy);
NS_ASSERTION((wx == mSpaceManagerX) && (wy == mSpaceManagerY),
"bad coord system");
#endif
mBand.GetAvailableSpace(mY - BorderPadding().top, mAvailSpaceRect);
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("GetAvailableSpace: band=%d,%d,%d,%d count=%d\n",
mAvailSpaceRect.x, mAvailSpaceRect.y,
mAvailSpaceRect.width, mAvailSpaceRect.height,
mBand.GetTrapezoidCount());
}
#endif
}
void GetAvailableSpace(nscoord aY) {
#ifdef DEBUG
// Verify that the caller setup the coordinate system properly
nscoord wx, wy;
mSpaceManager->GetTranslation(wx, wy);
NS_ASSERTION((wx == mSpaceManagerX) && (wy == mSpaceManagerY),
"bad coord system");
#endif
mBand.GetAvailableSpace(aY - BorderPadding().top, mAvailSpaceRect);
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("GetAvailableSpace: band=%d,%d,%d,%d count=%d\n",
mAvailSpaceRect.x, mAvailSpaceRect.y,
mAvailSpaceRect.width, mAvailSpaceRect.height,
mBand.GetTrapezoidCount());
}
#endif
}
void InitFloater(nsLineLayout& aLineLayout,
nsPlaceholderFrame* aPlaceholderFrame);
void AddFloater(nsLineLayout& aLineLayout,
nsPlaceholderFrame* aPlaceholderFrame,
PRBool aInitialReflow);
PRBool CanPlaceFloater(const nsRect& aFloaterRect, PRUint8 aFloats);
void PlaceFloater(nsFloaterCache* aFloaterCache,
PRBool* aIsLeftFloater);
void PlaceBelowCurrentLineFloaters(nsFloaterCacheList& aFloaters);
void ClearFloaters(nscoord aY, PRUint8 aBreakType);
PRBool ClearPastFloaters(PRUint8 aBreakType);
PRBool IsLeftMostChild(nsIPresContext* aPresContext, nsIFrame* aFrame);
PRBool IsAdjacentWithTop() const {
return mY == mReflowState.mComputedBorderPadding.top;
}
const nsMargin& BorderPadding() const {
return mReflowState.mComputedBorderPadding;
}
const nsMargin& Margin() const {
return mReflowState.mComputedMargin;
}
void UpdateMaxElementSize(const nsSize& aMaxElementSize) {
#ifdef NOISY_MAX_ELEMENT_SIZE
nsSize oldSize = mMaxElementSize;
#endif
if (aMaxElementSize.width > mMaxElementSize.width) {
mMaxElementSize.width = aMaxElementSize.width;
}
if (aMaxElementSize.height > mMaxElementSize.height) {
mMaxElementSize.height = aMaxElementSize.height;
}
#ifdef NOISY_MAX_ELEMENT_SIZE
if ((mMaxElementSize.width != oldSize.width) ||
(mMaxElementSize.height != oldSize.height)) {
nsFrame::IndentBy(stdout, mBlock->GetDepth());
if (NS_UNCONSTRAINEDSIZE == mReflowState.availableWidth) {
printf("PASS1 ");
}
nsFrame::ListTag(stdout, mBlock);
printf(": old max-element-size=%d,%d new=%d,%d\n",
oldSize.width, oldSize.height,
mMaxElementSize.width, mMaxElementSize.height);
}
#endif
}
void UpdateMaximumWidth(nscoord aMaximumWidth) {
if (aMaximumWidth > mMaximumWidth) {
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockReflowState::UpdateMaximumWidth block %p caching max width %d\n", mBlock, aMaximumWidth);
#endif
mMaximumWidth = aMaximumWidth;
}
}
void RecoverVerticalMargins(nsLineBox* aLine,
PRBool aApplyTopMargin,
nscoord* aTopMarginResult,
nscoord* aBottomMarginResult);
void ComputeBlockAvailSpace(nsIFrame* aFrame,
nsSplittableType aSplitType,
const nsStyleDisplay* aDisplay,
nsRect& aResult);
void RecoverStateFrom(nsLineBox* aLine,
PRBool aApplyTopMargin,
nscoord aDeltaY,
nsRect* aDamageRect);
void AdvanceToNextLine() {
mLineNumber++;
}
PRBool IsImpactedByFloater() {
#ifdef REALLY_NOISY_REFLOW
printf("nsBlockReflowState::IsImpactedByFloater %p returned %d\n",
this, mBand.GetFloaterCount());
#endif
return mBand.GetFloaterCount();
}
nsLineBox* NewLineBox(nsIFrame* aFrame, PRInt32 aCount, PRBool aIsBlock);
void FreeLineBox(nsLineBox* aLine);
void StoreMaxElementSize(nsIFrame* aFloater, const nsSize& aSize) {
mBand.StoreMaxElementSize(mPresContext, aFloater, aSize);
}
//----------------------------------------
// This state is the "global" state computed once for the reflow of
// the block.
// The block frame that is using this object
nsBlockFrame* mBlock;
nsIPresContext* mPresContext;
const nsHTMLReflowState& mReflowState;
nsISpaceManager* mSpaceManager;
// The coordinates within the spacemanager where the block is being
// placed <b>after</b> taking into account the blocks border and
// padding. This, therefore, represents the inner "content area" (in
// spacemanager coordinates) where child frames will be placed,
// including child blocks and floaters.
nscoord mSpaceManagerX, mSpaceManagerY;
// XXX get rid of this
nsReflowStatus mReflowStatus;
nscoord mBottomEdge;
// The content area to reflow child frames within. The x/y
// coordinates are known to be mBorderPadding.left and
// mBorderPadding.top. The width/height may be NS_UNCONSTRAINEDSIZE
// if the container reflowing this frame has given the frame an
// unconstrained area.
nsSize mContentArea;
//----------------------------------------
// This state is "running" state updated by the reflow of each line
// in the block. This same state is "recovered" when a line is not
// dirty and is passed over during incremental reflow.
// The current line being reflowed
nsLineBox* mCurrentLine;
// The previous line just reflowed
nsLineBox* mPrevLine;
// The current Y coordinate in the block
nscoord mY;
// The available space within the current band.
nsRect mAvailSpaceRect;
// The maximum x-most of each line
nscoord mKidXMost;
// The combined area of all floaters placed so far
nsRect mFloaterCombinedArea;
// For unconstained-width reflow, we keep the right floaters
// combined area stored seperately.
PRBool mHaveRightFloaters;
nsRect mRightFloaterCombinedArea;
nsFloaterCacheFreeList mFloaterCacheFreeList;
// Previous child. This is used when pulling up a frame to update
// the sibling list.
nsIFrame* mPrevChild;
// The next immediate child frame that is the target of an
// incremental reflow command. Once that child has been reflowed we
// null this slot out.
nsIFrame* mNextRCFrame;
// The previous child frames collapsed bottom margin value.
nscoord mPrevBottomMargin;
// The current next-in-flow for the block. When lines are pulled
// from a next-in-flow, this is used to know which next-in-flow to
// pull from. When a next-in-flow is emptied of lines, we advance
// this to the next next-in-flow.
nsBlockFrame* mNextInFlow;
// The current band data for the current Y coordinate
nsBlockBandData mBand;
//----------------------------------------
// Temporary line-reflow state. This state is used during the reflow
// of a given line, but doesn't have meaning before or after.
// The list of floaters that are "current-line" floaters. These are
// added to the line after the line has been reflowed, to keep the
// list fiddling from being N^2.
nsFloaterCacheFreeList mCurrentLineFloaters;
// The list of floaters which are "below current-line"
// floaters. These are reflowed/placed after the line is reflowed
// and placed. Again, this is done to keep the list fiddling from
// being N^2.
nsFloaterCacheFreeList mBelowCurrentLineFloaters;
nsSize mMaxElementSize;
nscoord mMaximumWidth;
nscoord mMinLineHeight;
PRInt32 mLineNumber;
// block reflow state flags
#define BRS_UNCONSTRAINEDWIDTH 0x00000001
#define BRS_UNCONSTRAINEDHEIGHT 0x00000002
#define BRS_SHRINKWRAPWIDTH 0x00000004
#define BRS_NEEDRESIZEREFLOW 0x00000008
#define BRS_ISINLINEINCRREFLOW 0x00000010
#define BRS_NOWRAP 0x00000020
#define BRS_ISTOPMARGINROOT 0x00000040 // Is this frame a root for top/bottom margin collapsing?
#define BRS_ISBOTTOMMARGINROOT 0x00000080
#define BRS_APPLYTOPMARGIN 0x00000100 // See ShouldApplyTopMargin
#define BRS_COMPUTEMAXELEMENTSIZE 0x00000200
#define BRS_COMPUTEMAXWIDTH 0x00000400
#define BRS_LASTFLAG BRS_COMPUTEMAXWIDTH
PRInt16 mFlags;
void SetFlag(PRUint32 aFlag, PRBool aValue)
{
NS_ASSERTION(aFlag<=BRS_LASTFLAG, "bad flag");
NS_ASSERTION(aValue==PR_FALSE || aValue==PR_TRUE, "bad value");
if (aValue) { // set flag
mFlags |= aFlag;
}
else { // unset flag
mFlags &= ~aFlag;
}
}
PRBool GetFlag(PRUint32 aFlag) const
{
NS_ASSERTION(aFlag<=BRS_LASTFLAG, "bad flag");
PRBool result = (mFlags & aFlag);
if (result) return PR_TRUE;
return PR_FALSE;
}
};
// XXX This is vile. Make it go away
void
nsLineLayout::InitFloater(nsPlaceholderFrame* aFrame)
{
mBlockRS->InitFloater(*this, aFrame);
}
void
nsLineLayout::AddFloater(nsPlaceholderFrame* aFrame)
{
mBlockRS->AddFloater(*this, aFrame, PR_FALSE);
}
//----------------------------------------------------------------------
nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsIPresContext* aPresContext,
nsBlockFrame* aFrame,
const nsHTMLReflowMetrics& aMetrics,
PRBool aBlockMarginRoot)
: mBlock(aFrame),
mPresContext(aPresContext),
mReflowState(aReflowState),
mNextRCFrame(nsnull),
mPrevBottomMargin(0),
mLineNumber(0),
mFlags(0)
{
const nsMargin& borderPadding = BorderPadding();
if (aBlockMarginRoot) {
SetFlag(BRS_ISTOPMARGINROOT, PR_TRUE);
SetFlag(BRS_ISBOTTOMMARGINROOT, PR_TRUE);
}
if (0 != aReflowState.mComputedBorderPadding.top) {
SetFlag(BRS_ISTOPMARGINROOT, PR_TRUE);
}
if (0 != aReflowState.mComputedBorderPadding.bottom) {
SetFlag(BRS_ISBOTTOMMARGINROOT, PR_TRUE);
}
if (GetFlag(BRS_ISTOPMARGINROOT)) {
SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
}
mSpaceManager = aReflowState.mSpaceManager;
NS_ASSERTION( nsnull != mSpaceManager, "SpaceManager should be set in nsBlockReflowState" );
if( nsnull != mSpaceManager ) {
// Translate into our content area and then save the
// coordinate system origin for later.
mSpaceManager->Translate(borderPadding.left, borderPadding.top);
mSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
}
mReflowStatus = NS_FRAME_COMPLETE;
mPresContext = aPresContext;
mBlock->GetNextInFlow((nsIFrame**)&mNextInFlow);
mKidXMost = 0;
// Compute content area width (the content area is inside the border
// and padding)
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedWidth) {
mContentArea.width = aReflowState.mComputedWidth;
}
else {
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
mContentArea.width = NS_UNCONSTRAINEDSIZE;
SetFlag(BRS_UNCONSTRAINEDWIDTH, PR_TRUE);
}
else if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
// Choose a width based on the content (shrink wrap width) up
// to the maximum width
// Part 2 of a possible fix for 38157
#ifdef FIX_BUG_38157
const nsMargin& margin = Margin();
nscoord availContentWidth = aReflowState.availableWidth;
if (NS_UNCONSTRAINEDSIZE != availContentWidth) {
availContentWidth -= (borderPadding.left + borderPadding.right) +
(margin.left + margin.right);
}
mContentArea.width = PR_MIN(aReflowState.mComputedMaxWidth, availContentWidth);
#else
mContentArea.width = aReflowState.mComputedMaxWidth;
#endif
SetFlag(BRS_SHRINKWRAPWIDTH, PR_TRUE);
}
else {
nscoord lr = borderPadding.left + borderPadding.right;
mContentArea.width = aReflowState.availableWidth - lr;
}
}
mHaveRightFloaters = PR_FALSE;
// Compute content area height. Unlike the width, if we have a
// specified style height we ignore it since extra content is
// managed by the "overflow" property. When we don't have a
// specified style height then we may end up limiting our height if
// the availableHeight is constrained (this situation occurs when we
// are paginated).
if (NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight) {
// We are in a paginated situation. The bottom edge is just inside
// the bottom border and padding. The content area height doesn't
// include either border or padding edge.
mBottomEdge = aReflowState.availableHeight - borderPadding.bottom;
mContentArea.height = mBottomEdge - borderPadding.top;
}
else {
// When we are not in a paginated situation then we always use
// an constrained height.
SetFlag(BRS_UNCONSTRAINEDHEIGHT, PR_TRUE);
mContentArea.height = mBottomEdge = NS_UNCONSTRAINEDSIZE;
}
mY = borderPadding.top;
mBand.Init(mSpaceManager, mContentArea);
mPrevChild = nsnull;
mCurrentLine = nsnull;
mPrevLine = nsnull;
const nsStyleText* styleText;
mBlock->GetStyleData(eStyleStruct_Text,
(const nsStyleStruct*&) styleText);
switch (styleText->mWhiteSpace) {
case NS_STYLE_WHITESPACE_PRE:
case NS_STYLE_WHITESPACE_NOWRAP:
SetFlag(BRS_NOWRAP, PR_TRUE);
break;
default:
SetFlag(BRS_NOWRAP, PR_FALSE);
break;
}
SetFlag(BRS_COMPUTEMAXELEMENTSIZE, (nsnull != aMetrics.maxElementSize));
#ifdef NOISY_MAX_ELEMENT_SIZE
printf("BRS: setting compute-MES to %d\n", (nsnull != aMetrics.maxElementSize));
#endif
mMaxElementSize.SizeTo(0, 0);
SetFlag(BRS_COMPUTEMAXWIDTH,
(NS_REFLOW_CALC_MAX_WIDTH == (aMetrics.mFlags & NS_REFLOW_CALC_MAX_WIDTH)));
mMaximumWidth = 0;
mMinLineHeight = nsHTMLReflowState::CalcLineHeight(mPresContext,
aReflowState.rendContext,
aReflowState.frame);
}
nsBlockReflowState::~nsBlockReflowState()
{
// Restore the coordinate system
const nsMargin& borderPadding = BorderPadding();
mSpaceManager->Translate(-borderPadding.left, -borderPadding.top);
}
nsLineBox*
nsBlockReflowState::NewLineBox(nsIFrame* aFrame,
PRInt32 aCount,
PRBool aIsBlock)
{
nsCOMPtr<nsIPresShell> shell;
mPresContext->GetShell(getter_AddRefs(shell));
return NS_NewLineBox(shell, aFrame, aCount, aIsBlock);
}
void
nsBlockReflowState::FreeLineBox(nsLineBox* aLine)
{
if (aLine) {
nsCOMPtr<nsIPresShell> presShell;
mPresContext->GetShell(getter_AddRefs(presShell));
aLine->Destroy(presShell);
}
}
// Compute the amount of available space for reflowing a block frame
// at the current Y coordinate. This method assumes that
// GetAvailableSpace has already been called.
void
nsBlockReflowState::ComputeBlockAvailSpace(nsIFrame* aFrame,
nsSplittableType aSplitType,
const nsStyleDisplay* aDisplay,
nsRect& aResult)
{
#ifdef REALLY_NOISY_REFLOW
printf("CBAS frame=%p has floater count %d\n", aFrame, mBand.GetFloaterCount());
mBand.List();
#endif
aResult.y = mY;
aResult.height = GetFlag(BRS_UNCONSTRAINEDHEIGHT)
? NS_UNCONSTRAINEDSIZE
: mBottomEdge - mY;
const nsMargin& borderPadding = BorderPadding();
if (NS_FRAME_SPLITTABLE_NON_RECTANGULAR == aSplitType) {
if (mBand.GetFloaterCount()) {
// Use the float-edge property to determine how the child block
// will interact with the floater.
const nsStyleSpacing* spacing;
aFrame->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&) spacing);
switch (spacing->mFloatEdge) {
default:
case NS_STYLE_FLOAT_EDGE_CONTENT: // content and only content does runaround of floaters
// The child block will flow around the floater. Therefore
// give it all of the available space.
aResult.x = borderPadding.left;
aResult.width = GetFlag(BRS_UNCONSTRAINEDWIDTH)
? NS_UNCONSTRAINEDSIZE
: mContentArea.width;
break;
case NS_STYLE_FLOAT_EDGE_BORDER:
case NS_STYLE_FLOAT_EDGE_PADDING:
{
// The child block's border should be placed adjacent to,
// but not overlap the floater(s).
nsMargin m(0, 0, 0, 0);
spacing->GetMargin(m); // XXX percentage margins
if (NS_STYLE_FLOAT_EDGE_PADDING == spacing->mFloatEdge) {
// Add in border too
nsMargin b;
spacing->GetBorder(b);
m += b;
}
// determine left edge
if (mBand.GetLeftFloaterCount()) {
aResult.x = mAvailSpaceRect.x + borderPadding.left - m.left;
}
else {
aResult.x = borderPadding.left;
}
// determine width
if (GetFlag(BRS_UNCONSTRAINEDWIDTH)) {
aResult.width = NS_UNCONSTRAINEDSIZE;
}
else {
if (mBand.GetRightFloaterCount()) {
if (mBand.GetLeftFloaterCount()) {
aResult.width = mAvailSpaceRect.width + m.left + m.right;
}
else {
aResult.width = mAvailSpaceRect.width + m.right;
}
}
else {
aResult.width = mAvailSpaceRect.width + m.left;
}
}
}
break;
case NS_STYLE_FLOAT_EDGE_MARGIN:
{
// The child block's margins should be placed adjacent to,
// but not overlap the floater.
aResult.x = mAvailSpaceRect.x + borderPadding.left;
aResult.width = mAvailSpaceRect.width;
}
break;
}
}
else {
// Since there are no floaters present the float-edge property
// doesn't matter therefore give the block element all of the
// available space since it will flow around the floater itself.
aResult.x = borderPadding.left;
aResult.width = GetFlag(BRS_UNCONSTRAINEDWIDTH)
? NS_UNCONSTRAINEDSIZE
: mContentArea.width;
}
}
else {
// The frame is clueless about the space manager and therefore we
// only give it free space. An example is a table frame - the
// tables do not flow around floaters.
aResult.x = mAvailSpaceRect.x + borderPadding.left;
aResult.width = mAvailSpaceRect.width;
}
#ifdef REALLY_NOISY_REFLOW
printf(" CBAS: result %d %d %d %d\n", aResult.x, aResult.y, aResult.width, aResult.height);
#endif
}
PRBool
nsBlockReflowState::ClearPastFloaters(PRUint8 aBreakType)
{
nscoord saveY, deltaY;
PRBool applyTopMargin = PR_FALSE;
switch (aBreakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
// Apply the previous margin before clearing
saveY = mY + mPrevBottomMargin;
ClearFloaters(saveY, aBreakType);
#ifdef NOISY_FLOATER_CLEARING
nsFrame::ListTag(stdout, mBlock);
printf(": ClearPastFloaters: mPrevBottomMargin=%d saveY=%d oldY=%d newY=%d deltaY=%d\n",
mPrevBottomMargin, saveY, saveY - mPrevBottomMargin, mY,
mY - saveY);
#endif
// Determine how far we just moved. If we didn't move then there
// was nothing to clear to don't mess with the normal margin
// collapsing behavior. In either case we need to restore the Y
// coordinate to what it was before the clear.
deltaY = mY - saveY;
if (0 != deltaY) {
// Pretend that the distance we just moved is a previous
// blocks bottom margin. Note that GetAvailableSpace has been
// done so that the available space calculations will be done
// after clearing the appropriate floaters.
//
// What we are doing here is applying CSS2 section 9.5.2's
// rules for clearing - "The top margin of the generated box
// is increased enough that the top border edge is below the
// bottom outer edge of the floating boxes..."
//
// What this will do is cause the top-margin of the block
// frame we are about to reflow to be collapsed with that
// distance.
mPrevBottomMargin = deltaY;
mY = saveY;
// Force margin to be applied in this circumstance
applyTopMargin = PR_TRUE;
}
else {
// Put aState.mY back to its original value since no clearing
// happened. That way the previous blocks bottom margin will
// be applied properly.
mY = saveY - mPrevBottomMargin;
}
break;
}
return applyTopMargin;
}
// Recover the collapsed vertical margin values for aLine. Note that
// the values are not collapsed with aState.mPrevBottomMargin, nor are
// they collapsed with each other when the line height is zero.
void
nsBlockReflowState::RecoverVerticalMargins(nsLineBox* aLine,
PRBool aApplyTopMargin,
nscoord* aTopMarginResult,
nscoord* aBottomMarginResult)
{
if (aLine->IsBlock()) {
// Update band data
GetAvailableSpace();
// Setup reflow state to compute the block childs top and bottom
// margins
nsIFrame* frame = aLine->mFirstChild;
nsRect availSpaceRect;
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
frame->IsSplittable(splitType);
ComputeBlockAvailSpace(frame, splitType, display, availSpaceRect);
nsSize availSpace(availSpaceRect.width, availSpaceRect.height);
nsHTMLReflowState reflowState(mPresContext, mReflowState,
frame, availSpace);
// Compute collapsed top margin
nscoord topMargin = 0;
if (aApplyTopMargin) {
topMargin =
nsBlockReflowContext::ComputeCollapsedTopMargin(mPresContext,
reflowState);
}
// Compute collapsed bottom margin
nscoord bottomMargin = reflowState.mComputedMargin.bottom;
bottomMargin =
nsBlockReflowContext::MaxMargin(bottomMargin,
aLine->GetCarriedOutBottomMargin());
*aTopMarginResult = topMargin;
*aBottomMarginResult = bottomMargin;
}
else {
// XXX_ib
*aTopMarginResult = 0;
*aBottomMarginResult = 0;
}
}
void
nsBlockReflowState::RecoverStateFrom(nsLineBox* aLine,
PRBool aApplyTopMargin,
nscoord aDeltaY,
nsRect* aDamageRect)
{
// Make the line being recovered the current line
mCurrentLine = aLine;
// Update aState.mPrevChild as if we had reflowed all of the frames
// in this line.
mPrevChild = aLine->LastChild();
// Recover mKidXMost and mMaxElementSize
nscoord xmost = aLine->mBounds.XMost();
if (xmost > mKidXMost) {
#ifdef DEBUG
if (CRAZY_WIDTH(xmost)) {
nsFrame::ListTag(stdout, mBlock);
printf(": WARNING: xmost:%d\n", xmost);
}
#endif
#ifdef NOISY_KIDXMOST
printf("%p RecoverState block %p aState.mKidXMost=%d\n", this, mBlock, xmost);
#endif
mKidXMost = xmost;
}
if (GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
#ifdef NOISY_MAX_ELEMENT_SIZE
printf("nsBlockReflowState::RecoverStateFrom block %p caching max width %d\n", mBlock, aLine->mMaxElementWidth);
#endif
UpdateMaxElementSize(nsSize(aLine->mMaxElementWidth, aLine->mBounds.height));
}
// If computing the maximum width, then update mMaximumWidth
if (GetFlag(BRS_COMPUTEMAXWIDTH)) {
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockReflowState::RecoverStateFrom block %p caching max width %d\n", mBlock, aLine->mMaximumWidth);
#endif
UpdateMaximumWidth(aLine->mMaximumWidth);
}
// The line may have clear before semantics.
if (aLine->IsBlock() && aLine->HasBreak()) {
// Clear past floaters before the block if the clear style is not none
aApplyTopMargin = ClearPastFloaters(aLine->GetBreakType());
#ifdef NOISY_VERTICAL_MARGINS
nsFrame::ListTag(stdout, mBlock);
printf(": RecoverStateFrom: y=%d child ", mY);
nsFrame::ListTag(stdout, aLine->mFirstChild);
printf(" has clear of %d => %s, mPrevBottomMargin=%d\n", aLine->mBreakType,
aApplyTopMargin ? "applyTopMargin" : "nope", mPrevBottomMargin);
#endif
}
// Recover mPrevBottomMargin and calculate the line's new Y
// coordinate (newLineY)
nscoord newLineY = mY;
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if (aLine->IsBlock()) {
if ((0 == aLine->mBounds.height) && (0 == lineCombinedArea.height)) {
// The line's top and bottom margin values need to be collapsed
// with the mPrevBottomMargin to determine a new
// mPrevBottomMargin value.
nscoord topMargin, bottomMargin;
RecoverVerticalMargins(aLine, aApplyTopMargin,
&topMargin, &bottomMargin);
nscoord m = nsBlockReflowContext::MaxMargin(bottomMargin,
mPrevBottomMargin);
m = nsBlockReflowContext::MaxMargin(m, topMargin);
mPrevBottomMargin = m;
}
else {
// Recover the top and bottom margins for this line
nscoord topMargin, bottomMargin;
RecoverVerticalMargins(aLine, aApplyTopMargin,
&topMargin, &bottomMargin);
// Compute the collapsed top margin value
nscoord collapsedTopMargin =
nsBlockReflowContext::MaxMargin(topMargin, mPrevBottomMargin);
// The lineY is just below the collapsed top margin value. The
// mPrevBottomMargin gets set to the bottom margin value for the
// line.
newLineY += collapsedTopMargin;
mPrevBottomMargin = bottomMargin;
}
}
else if (0 == aLine->GetHeight()) {
// For empty inline lines we leave the previous bottom margin
// alone so that it's collpased with the next line.
}
else {
// For non-empty inline lines the previous margin is applied
// before the line. Therefore apply it now and zero it out.
newLineY += mPrevBottomMargin;
mPrevBottomMargin = 0;
}
// Save away the old combined area for later
nsRect oldCombinedArea = lineCombinedArea;
// Slide the frames in the line by the computed delta. This also
// updates the lines Y coordinate and the combined area's Y
// coordinate.
nscoord finalDeltaY = newLineY - aLine->mBounds.y;
mBlock->SlideLine(*this, aLine, finalDeltaY);
// aLine has been slided, but...
// XXX it is not necessary to worry about the ascent of mBlock here, right?
// Indeed, depending on the status of the first line of mBlock, we can either have:
// case first line of mBlock is dirty : it will be reflowed by mBlock and so
// mBlock->mAscent will be recomputed by the block frame, and we will
// never enter into this RecoverStateFrom(aLine) function.
// case first line of mBlock is clean : it is untouched by the incremental reflow.
// In other words, aLine is never equals to mBlock->mLines in this function.
// so mBlock->mAscent will remain unchanged.
// Place floaters for this line into the space manager
if (aLine->HasFloaters()) {
// Undo border/padding translation since the nsFloaterCache's
// coordinates are relative to the frame not relative to the
// border/padding.
const nsMargin& bp = BorderPadding();
mSpaceManager->Translate(-bp.left, -bp.top);
// Place the floaters into the space-manager again. Also slide
// them, just like the regular frames on the line.
nsRect r;
nsFloaterCache* fc = aLine->GetFirstFloater();
while (fc) {
fc->mRegion.y += finalDeltaY;
fc->mCombinedArea.y += finalDeltaY;
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
floater->GetRect(r);
floater->MoveTo(mPresContext, r.x, r.y + finalDeltaY);
#ifdef DEBUG
if (gNoisyReflow || gNoisySpaceManager) {
nscoord tx, ty;
mSpaceManager->GetTranslation(tx, ty);
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("RecoverState: txy=%d,%d (%d,%d) ",
tx, ty, mSpaceManagerX, mSpaceManagerY);
nsFrame::ListTag(stdout, floater);
printf(" r.y=%d finalDeltaY=%d (sum=%d) region={%d,%d,%d,%d}\n",
r.y, finalDeltaY, r.y + finalDeltaY,
fc->mRegion.x, fc->mRegion.y,
fc->mRegion.width, fc->mRegion.height);
}
#endif
mSpaceManager->AddRectRegion(floater, fc->mRegion);
fc = fc->Next();
}
#ifdef DEBUG
if (gNoisyReflow || gNoisySpaceManager) {
mSpaceManager->List(stdout);
}
#endif
// And then put the translation back again
mSpaceManager->Translate(bp.left, bp.top);
}
// Recover mY
mY = aLine->mBounds.YMost();
// Compute the damage area
if (aDamageRect) {
if (0 == finalDeltaY) {
aDamageRect->Empty();
} else {
aLine->GetCombinedArea(&lineCombinedArea);
aDamageRect->UnionRect(oldCombinedArea, lineCombinedArea);
}
}
// It's possible that the line has clear after semantics
if (!aLine->IsBlock() && aLine->HasBreak()) {
PRUint8 breakType = aLine->GetBreakType();
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
ClearFloaters(mY, breakType);
break;
}
}
}
//----------------------------------------------------------------------
const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
nsresult
NS_NewBlockFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsBlockFrame* it = new (aPresShell) nsBlockFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
*aNewFrame = it;
return NS_OK;
}
nsBlockFrame::nsBlockFrame()
{
#ifdef DEBUG
InitDebugFlags();
#endif
}
nsBlockFrame::~nsBlockFrame()
{
}
NS_IMETHODIMP
nsBlockFrame::Destroy(nsIPresContext* aPresContext)
{
mAbsoluteContainer.DestroyFrames(this, aPresContext);
// Outside bullets are not in our child-list so check for them here
// and delete them when present.
if (HaveOutsideBullet()) {
mBullet->Destroy(aPresContext);
mBullet = nsnull;
}
mFloaters.DestroyFrames(aPresContext);
nsLineBox::DeleteLineList(aPresContext, mLines);
return nsBlockFrameSuper::Destroy(aPresContext);
}
NS_IMETHODIMP
nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kBlockFrameCID)) {
nsBlockFrame* tmp = this;
*aInstancePtr = (void*) tmp;
return NS_OK;
}
if ( aIID.Equals(NS_GET_IID(nsILineIterator)) || aIID.Equals(NS_GET_IID(nsILineIteratorNavigator)) )
{
nsLineIterator* it = new nsLineIterator;
if (!it) {
*aInstancePtr = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
const nsStyleDisplay* display;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
nsresult rv = it->Init(mLines,
display->mDirection == NS_STYLE_DIRECTION_RTL);
if (NS_FAILED(rv)) {
delete it;
return rv;
}
NS_ADDREF((nsILineIterator *) (*aInstancePtr = (void *) it));
return NS_OK;
}
return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
{
aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
return NS_OK;
}
#ifdef DEBUG
NS_METHOD
nsBlockFrame::List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
{
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", mParent);
#endif
nsIView* view;
GetView(aPresContext, &view);
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", mNextSibling);
}
// Output the flow linkage
if (nsnull != mPrevInFlow) {
fprintf(out, " prev-in-flow=%p", mPrevInFlow);
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", mNextInFlow);
}
// Output the rect and state
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
PRInt32 numInlineLines = 0;
PRInt32 numBlockLines = 0;
if (nsnull != mLines) {
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->IsBlock()) {
numBlockLines++;
}
else {
numInlineLines++;
}
line = line->mNext;
}
}
fprintf(out, " sc=%p(i=%d,b=%d)<\n", mStyleContext, numInlineLines, numBlockLines);
aIndent++;
// Output the lines
if (nsnull != mLines) {
nsLineBox* line = mLines;
while (nsnull != line) {
line->List(aPresContext, out, aIndent);
line = line->mNext;
}
}
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
for (;;) {
nsIFrame* kid;
GetAdditionalChildListName(listIndex++, &listName);
if (nsnull == listName) {
break;
}
FirstChild(aPresContext, listName, &kid);
if (nsnull != kid) {
IndentBy(out, aIndent);
nsAutoString tmp;
if (nsnull != listName) {
listName->ToString(tmp);
fputs(tmp, out);
}
fputs("<\n", out);
while (nsnull != kid) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(kid->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
frameDebug->List(aPresContext, out, aIndent + 1);
}
kid->GetNextSibling(&kid);
}
IndentBy(out, aIndent);
fputs(">\n", out);
}
NS_IF_RELEASE(listName);
}
aIndent--;
IndentBy(out, aIndent);
fputs(">\n", out);
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Block", aResult);
}
#endif
NS_IMETHODIMP
nsBlockFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::blockFrame;
NS_ADDREF(*aType);
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////
// Child frame enumeration
NS_IMETHODIMP
nsBlockFrame::FirstChild(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame** aFirstChild) const
{
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
if (aListName == nsLayoutAtoms::absoluteList) {
return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild);
}
else if (nsnull == aListName) {
*aFirstChild = (nsnull != mLines) ? mLines->mFirstChild : nsnull;
return NS_OK;
}
else if (aListName == nsLayoutAtoms::overflowList) {
nsLineBox* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
*aFirstChild = overflowLines ? overflowLines->mFirstChild : nsnull;
return NS_OK;
}
else if (aListName == nsLayoutAtoms::floaterList) {
*aFirstChild = mFloaters.FirstChild();
return NS_OK;
}
else if (aListName == nsLayoutAtoms::bulletList) {
if (HaveOutsideBullet()) {
*aFirstChild = mBullet;
}
else {
*aFirstChild = nsnull;
}
return NS_OK;
}
*aFirstChild = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
nsBlockFrame::GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const
{
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
if (aIndex < 0) {
return NS_ERROR_INVALID_ARG;
}
*aListName = nsnull;
switch (aIndex) {
case NS_BLOCK_FRAME_FLOATER_LIST_INDEX:
*aListName = nsLayoutAtoms::floaterList;
NS_ADDREF(*aListName);
break;
case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
*aListName = nsLayoutAtoms::bulletList;
NS_ADDREF(*aListName);
break;
case NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX:
*aListName = nsLayoutAtoms::absoluteList;
NS_ADDREF(*aListName);
break;
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Frame structure methods
//////////////////////////////////////////////////////////////////////
// Reflow methods
inline nscoord
nsBlockFrame::GetAscent() const
{
return mAscent;
}
static void
CalculateContainingBlock(const nsHTMLReflowState& aReflowState,
nscoord aFrameWidth,
nscoord aFrameHeight,
nscoord& aContainingBlockWidth,
nscoord& aContainingBlockHeight)
{
aContainingBlockWidth = -1; // have reflow state calculate
aContainingBlockHeight = -1; // have reflow state calculate
// The issue there is that for a 'height' of 'auto' the reflow state code
// won't know how to calculate the containing block height because it's
// calculated bottom up. We don't really want to do this for the initial
// containing block so that's why we have the check for if the element
// is absolutely or relatively positioned
if (aReflowState.mStylePosition->IsAbsolutelyPositioned() ||
(NS_STYLE_POSITION_RELATIVE == aReflowState.mStylePosition->mPosition)) {
aContainingBlockWidth = aFrameWidth;
aContainingBlockHeight = aFrameHeight;
// Containing block is relative to the padding edge
nsMargin border;
if (!aReflowState.mStyleSpacing->GetBorder(border)) {
NS_NOTYETIMPLEMENTED("percentage border");
}
aContainingBlockWidth -= border.left + border.right;
aContainingBlockHeight -= border.top + border.bottom;
}
}
NS_IMETHODIMP
nsBlockFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
/*ListTag(stdout);
printf(": begin reflow type %d availSize=%d,%d computedSize=%d,%d\n",
aReflowState.reason, aReflowState.availableWidth, aReflowState.availableHeight,
aReflowState.mComputedWidth, aReflowState.mComputedHeight);*/
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame", aReflowState.reason);
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": begin reflow type %d availSize=%d,%d computedSize=%d,%d\n",
aReflowState.reason, aReflowState.availableWidth, aReflowState.availableHeight,
aReflowState.mComputedWidth, aReflowState.mComputedHeight);
}
if (gNoisy) {
gNoiseIndent++;
}
PRTime start;
PRInt32 ctc;
if (gLameReflowMetrics) {
start = PR_Now();
ctc = nsLineBox::GetCtorCount();
}
#endif
// See if it's an incremental reflow command
if (eReflowReason_Incremental == aReflowState.reason) {
// Give the absolute positioning code a chance to handle it
nscoord containingBlockWidth;
nscoord containingBlockHeight;
PRBool handled;
nsRect childBounds;
CalculateContainingBlock(aReflowState, mRect.width, mRect.height,
containingBlockWidth, containingBlockHeight);
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
containingBlockWidth, containingBlockHeight,
handled, childBounds);
// If the incremental reflow command was handled by the absolute positioning
// code, then we're all done
if (handled) {
// Just return our current size as our desired size.
// XXX We need to know the overflow area for the flowed content, and
// we don't have a way to get that currently so for the time being pretend
// a resize reflow occured
#if 0
aMetrics.width = mRect.width;
aMetrics.height = mRect.height;
aMetrics.ascent = mRect.height;
aMetrics.descent = 0;
// Whether or not we're complete hasn't changed
aStatus = (nsnull != mNextInFlow) ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
#else
nsHTMLReflowState reflowState(aReflowState);
reflowState.reason = eReflowReason_Resize;
reflowState.reflowCommand = nsnull;
nsBlockFrame::Reflow(aPresContext, aMetrics, reflowState, aStatus);
#endif
// Factor the absolutely positioned child bounds into the overflow area
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
} else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
return NS_OK;
}
}
if (IsFrameTreeTooDeep(aReflowState, aMetrics)) {
#ifdef DEBUG_kipp
{
extern char* nsPresShell_ReflowStackPointerTop;
char marker;
char* newsp = (char*) &marker;
printf("XXX: frame tree is too deep; approx stack size = %d\n",
nsPresShell_ReflowStackPointerTop - newsp);
}
#endif
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
// Should we create a space manager?
nsCOMPtr<nsISpaceManager> spaceManager;
nsISpaceManager* oldSpaceManager = aReflowState.mSpaceManager;
if (NS_BLOCK_SPACE_MGR & mState) {
nsSpaceManager* rawPtr = new nsSpaceManager(this);
if (!rawPtr) {
return NS_ERROR_OUT_OF_MEMORY;
}
spaceManager = do_QueryInterface(rawPtr);
// Set the space manager in the existing reflow state
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
reflowState.mSpaceManager = spaceManager.get();
#ifdef NOISY_SPACEMANAGER
printf("constructed new space manager %p\n", reflowState.mSpaceManager);
#endif
}
nsBlockReflowState state(aReflowState, aPresContext, this, aMetrics,
NS_BLOCK_MARGIN_ROOT & mState);
if (eReflowReason_Resize != aReflowState.reason) {
RenumberLists(aPresContext);
}
nsresult rv = NS_OK;
PRBool isStyleChange = PR_FALSE;
state.SetFlag(BRS_ISINLINEINCRREFLOW, PR_FALSE);
nsIFrame* target;
switch (aReflowState.reason) {
case eReflowReason_Initial:
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=initial\n");
#endif
DrainOverflowLines(aPresContext);
rv = PrepareInitialReflow(state);
mState &= ~NS_FRAME_FIRST_REFLOW;
break;
case eReflowReason_Dirty:
break;
case eReflowReason_Incremental: // should call GetNext() ?
aReflowState.reflowCommand->GetTarget(target);
if (this == target) {
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=incremental type=%d\n", type);
#endif
switch (type) {
case nsIReflowCommand::StyleChanged:
rv = PrepareStyleChangedReflow(state);
isStyleChange = PR_TRUE;
break;
case nsIReflowCommand::ReflowDirty:
break;
default:
// Map any other incremental operations into full reflows
rv = PrepareResizeReflow(state);
break;
}
}
else {
// Get next frame in reflow command chain
aReflowState.reflowCommand->GetNext(state.mNextRCFrame);
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=incremental");
if (state.mNextRCFrame) {
printf(" next=");
nsFrame::ListTag(stdout, state.mNextRCFrame);
}
printf("\n");
#endif
// this code does a correct job of propogating incremental reflows (bug 25510)
// and has the potential to be very efficient. we should be able to
// terminate reflow after the incremental reflow if we can detect that
// nothing significant has changed.
PRBool isFloater;
nsLineBox* prevLine;
nsLineBox* line = FindLineFor(state.mNextRCFrame, &prevLine, &isFloater);
if (line && (PR_FALSE==line->IsBlock()))
{
if (!isFloater) // punt if isFloater!
{
// reflow the line containing the target of the incr. reflow
// first mark the line dirty and set up the state object
rv = PrepareChildIncrementalReflow(state);
state.SetFlag(BRS_ISINLINEINCRREFLOW, PR_TRUE);
state.mPrevLine = prevLine;
state.mCurrentLine = line;
state.mNextRCFrame = state.mNextRCFrame;
// let ReflowDirtyLines do all the work
rv = ReflowDirtyLines(state);
if (NS_FAILED(rv)) {
NS_ASSERTION(0, "Reflow failed\n");
return rv;
}
// compute the final size
ComputeFinalSize(aReflowState, state, aMetrics);
// finally, mark this block frame as having a dirty child and return
// XXX: we should be able to optimize this so we only call ReflowDirtyChild
// if it's absolutely necessary: something on the line changed size.
if (!IsIncrementalDamageConstrained(state))
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
rv = ReflowDirtyChild(shell, state.mNextRCFrame);
//XXX: it's possible we need to do some work regarding incremental painting
// here, see code below "ReflowDirtyLines() after this switch statement.
// It might be right to factor the tail end of this method into a new method
// and call that here before calling ReflowDirtyChild().
}
return rv;
}
}
rv = PrepareChildIncrementalReflow(state);
}
break;
case eReflowReason_StyleChange:
rv = PrepareStyleChangedReflow(state);
break;
case eReflowReason_Resize:
default:
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": reflow=resize (%d)\n", aReflowState.reason);
#endif
DrainOverflowLines(aPresContext);
rv = PrepareResizeReflow(state);
break;
}
if (NS_FAILED(rv)) {
NS_ASSERTION(0, "setting up reflow failed.\n");
return rv;
}
// Now reflow...
rv = ReflowDirtyLines(state);
if (NS_FAILED(rv)) {
NS_ASSERTION(0, "reflow dirty lines failed.\n");
return rv;
}
aStatus = state.mReflowStatus;
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
if (NS_STYLE_OVERFLOW_HIDDEN == aReflowState.mStyleDisplay->mOverflow) {
aStatus = NS_FRAME_COMPLETE;
}
else {
#ifdef DEBUG_kipp
ListTag(stdout); printf(": block is not complete\n");
#endif
}
}
// XXX_pref get rid of this!
BuildFloaterList();
// Compute our final size
ComputeFinalSize(aReflowState, state, aMetrics);
if (NS_BLOCK_WRAP_SIZE & mState) {
// When the area frame is supposed to wrap around all in-flow
// children, make sure its big enough to include those that stick
// outside the box.
if (NS_FRAME_OUTSIDE_CHILDREN & mState) {
nscoord xMost = aMetrics.mOverflowArea.XMost();
if (xMost > aMetrics.width) {
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": changing desired width from %d to %d\n", aMetrics.width, xMost);
#endif
aMetrics.width = xMost;
}
nscoord yMost = aMetrics.mOverflowArea.YMost();
if (yMost > aMetrics.height) {
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": changing desired height from %d to %d\n", aMetrics.height, yMost);
#endif
aMetrics.height = yMost;
}
}
}
// see if verifyReflow is enabled, and if so store off the space manager pointer
#ifdef DEBUG
PRInt32 verifyReflowFlags = nsIPresShell::GetVerifyReflowFlags();
if (VERIFY_REFLOW_INCLUDE_SPACE_MANAGER & verifyReflowFlags)
{
// this is a leak of the space manager, but it's only in debug if verify reflow is enabled, so not a big deal
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
if (shell) {
nsCOMPtr<nsIFrameManager> frameManager;
shell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
NS_ADDREF(reflowState.mSpaceManager);
rv = frameManager->SetFrameProperty(this, nsLayoutAtoms::spaceManagerProperty,
reflowState.mSpaceManager, nsnull /* should be nsSpaceManagerDestroyer*/);
}
}
}
#endif
// If we set the space manager, then restore the old space manager now that we're
// going out of scope
if (NS_BLOCK_SPACE_MGR & mState) {
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
#ifdef NOISY_SPACEMANAGER
printf("restoring old space manager %p\n", oldSpaceManager);
#endif
reflowState.mSpaceManager = oldSpaceManager;
}
#ifdef NOISY_SPACEMANAGER
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
if (reflowState.mSpaceManager) {
ListTag(stdout);
printf(": space-manager %p after reflow\n", reflowState.mSpaceManager);
reflowState.mSpaceManager->List(stdout);
}
#endif
// If this is an incremental reflow and we changed size, then make sure our
// border is repainted if necessary
if (eReflowReason_Incremental == aReflowState.reason ||
eReflowReason_Dirty == aReflowState.reason) {
if (isStyleChange) {
// Lots of things could have changed so damage our entire
// bounds
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 1 (%d, %d, %d, %d)\n",
this, 0, 0, mRect.width, mRect.height);
#endif
Invalidate(aPresContext, nsRect(0, 0, mRect.width, mRect.height));
} else {
nsMargin border = aReflowState.mComputedBorderPadding -
aReflowState.mComputedPadding;
// See if our width changed
if ((aMetrics.width != mRect.width) && (border.right > 0)) {
nsRect damageRect;
if (aMetrics.width < mRect.width) {
// Our new width is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = aMetrics.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = aMetrics.height;
} else {
// Our new width is larger, so we need to erase our border in its
// old position
damageRect.x = mRect.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = mRect.height;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 2 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
Invalidate(aPresContext, damageRect);
}
// See if our height changed
if ((aMetrics.height != mRect.height) && (border.bottom > 0)) {
nsRect damageRect;
if (aMetrics.height < mRect.height) {
// Our new height is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = 0;
damageRect.width = aMetrics.width;
damageRect.y = aMetrics.height - border.bottom;
damageRect.height = border.bottom;
} else {
// Our new height is larger, so we need to erase our border in its
// old position
damageRect.x = 0;
damageRect.width = mRect.width;
damageRect.y = mRect.height - border.bottom;
damageRect.height = border.bottom;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 3 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
Invalidate(aPresContext, damageRect);
}
}
}
// Let the absolutely positioned container reflow any absolutely positioned
// child frames that need to be reflowed, e.g., elements with a percentage
// based width/height
if (NS_SUCCEEDED(rv) && mAbsoluteContainer.HasAbsoluteFrames()) {
nscoord containingBlockWidth;
nscoord containingBlockHeight;
nsRect childBounds;
CalculateContainingBlock(aReflowState, aMetrics.width, aMetrics.height,
containingBlockWidth, containingBlockHeight);
rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
containingBlockWidth, containingBlockHeight,
childBounds);
// Factor the absolutely positioned child bounds into the overflow area
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
} else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
#ifdef DEBUG
if (gNoisy) {
gNoiseIndent--;
}
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
aMetrics.width, aMetrics.height,
aMetrics.mCarriedOutBottomMargin);
if (mState & NS_FRAME_OUTSIDE_CHILDREN) {
printf(" combinedArea={%d,%d,%d,%d}",
aMetrics.mOverflowArea.x,
aMetrics.mOverflowArea.y,
aMetrics.mOverflowArea.width,
aMetrics.mOverflowArea.height);
}
if (aMetrics.maxElementSize) {
printf(" maxElementSize=%d,%d",
aMetrics.maxElementSize->width,
aMetrics.maxElementSize->height);
}
printf("\n");
}
if (gLameReflowMetrics) {
PRTime end = PR_Now();
PRInt32 ectc = nsLineBox::GetCtorCount();
PRInt32 numLines = nsLineBox::ListLength(mLines);
if (!numLines) numLines = 1;
PRTime delta, perLineDelta, lines;
LL_I2L(lines, numLines);
LL_SUB(delta, end, start);
LL_DIV(perLineDelta, delta, lines);
ListTag(stdout);
char buf[400];
PR_snprintf(buf, sizeof(buf),
": %lld elapsed (%lld per line) (%d lines; %d new lines)",
delta, perLineDelta, numLines, ectc - ctc);
printf("%s\n", buf);
}
#endif
#ifdef NOISY_MAX_ELEMENT_SIZE
if (aMetrics.maxElementSize) {
printf("block %p returning with maxElementSize=%d,%d\n", this,
aMetrics.maxElementSize->width,
aMetrics.maxElementSize->height);
}
#endif
return rv;
}
static PRBool
HaveAutoWidth(const nsHTMLReflowState& aReflowState)
{
const nsHTMLReflowState* rs = &aReflowState;
if (NS_UNCONSTRAINEDSIZE == rs->mComputedWidth) {
return PR_TRUE;
}
const nsStylePosition* pos = rs->mStylePosition;
for (;;) {
if (!pos) {
return PR_TRUE;
}
nsStyleUnit widthUnit = pos->mWidth.GetUnit();
if (eStyleUnit_Auto == widthUnit) {
return PR_TRUE;
}
if (eStyleUnit_Inherit != widthUnit) {
break;
}
const nsHTMLReflowState* prs = (const nsHTMLReflowState*)
rs->parentReflowState;
if (!prs) {
return PR_TRUE;
}
rs = prs;
pos = prs->mStylePosition;
}
return PR_FALSE;
}
static PRBool
IsPercentageUnitSides(const nsStyleSides* aSides)
{
return eStyleUnit_Percent == aSides->GetLeftUnit()
|| eStyleUnit_Percent == aSides->GetRightUnit()
|| eStyleUnit_Percent == aSides->GetTopUnit()
|| eStyleUnit_Percent == aSides->GetBottomUnit();
}
static PRBool
IsPercentageAwareChild(const nsIFrame* aFrame)
{
const nsStyleSpacing* space;
nsresult rv = aFrame->GetStyleData(eStyleStruct_Spacing,(const nsStyleStruct*&) space);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (IsPercentageUnitSides(&space->mMargin)
|| IsPercentageUnitSides(&space->mPadding)
|| IsPercentageUnitSides(&space->mBorderRadius)) {
return PR_TRUE;
}
const nsStylePosition* pos;
rv = aFrame->GetStyleData(eStyleStruct_Position,(const nsStyleStruct*&) pos);
if (NS_FAILED(rv)) {
return PR_TRUE; // just to be on the safe side
}
if (eStyleUnit_Percent == pos->mWidth.GetUnit()
|| eStyleUnit_Percent == pos->mMaxWidth.GetUnit()
|| eStyleUnit_Percent == pos->mMinWidth.GetUnit()
|| eStyleUnit_Percent == pos->mHeight.GetUnit()
|| eStyleUnit_Percent == pos->mMinHeight.GetUnit()
|| eStyleUnit_Percent == pos->mMaxHeight.GetUnit()
|| IsPercentageUnitSides(&pos->mOffset)) { // XXX need more here!!!
return PR_TRUE;
}
return PR_FALSE;
}
void
nsBlockFrame::ComputeFinalSize(const nsHTMLReflowState& aReflowState,
nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
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
// Compute final width
nscoord maxWidth = 0, maxHeight = 0;
#ifdef NOISY_KIDXMOST
printf("%p aState.mKidXMost=%d\n", this, aState.mKidXMost);
#endif
nscoord minWidth = aState.mKidXMost + borderPadding.right;
if (!HaveAutoWidth(aReflowState)) {
// Use style defined width
aMetrics.width = borderPadding.left + aReflowState.mComputedWidth +
borderPadding.right;
// XXX quote css1 section here
if ((0 == aReflowState.mComputedWidth) && (aMetrics.width < minWidth)) {
aMetrics.width = minWidth;
}
// When style defines the width use it for the max-element-size
// because we can't shrink any smaller.
maxWidth = aMetrics.width;
}
else {
nscoord computedWidth = minWidth;
PRBool compact = PR_FALSE;
#if 0
if (NS_STYLE_DISPLAY_COMPACT == aReflowState.mStyleDisplay->mDisplay) {
// If we are display: compact AND we have no lines or we have
// exactly one line and that line is not a block line AND that
// line doesn't end in a BR of any sort THEN we remain a compact
// frame.
if ((nsnull == mLines) ||
((nsnull == mLines->mNext) && !mLines->IsBlock() &&
(NS_STYLE_CLEAR_NONE == mLines->GetBreakType())
/*XXX && (computedWidth <= aState.mCompactMarginWidth) */
)) {
compact = PR_TRUE;
}
}
#endif
// 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) &&
!compact) {
// 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)
computedWidth = borderPadding.left + aState.mContentArea.width +
borderPadding.right;
}
// See if we should compute our max element size
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
// Adjust the computedWidth
if (aState.GetFlag(BRS_NOWRAP)) {
// When no-wrap is true the max-element-size.width is the
// width of the widest line plus the right border. Note that
// aState.mKidXMost already has the left border factored in
//maxWidth = aState.mKidXMost + borderPadding.right;
maxWidth = aState.mMaxElementSize.width +
borderPadding.left + borderPadding.right;
}
else {
// Add in border and padding dimensions to already computed
// max-element-size values.
maxWidth = aState.mMaxElementSize.width +
borderPadding.left + borderPadding.right;
}
if (computedWidth < maxWidth) {
computedWidth = maxWidth;
}
}
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
nscoord computedMaxWidth = aReflowState.mComputedMaxWidth +
borderPadding.left + borderPadding.right;
if (computedWidth > computedMaxWidth) {
computedWidth = computedMaxWidth;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinWidth) {
nscoord computedMinWidth = aReflowState.mComputedMinWidth +
borderPadding.left + borderPadding.right;
if (computedWidth < computedMinWidth) {
computedWidth = 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 parent reflow state 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 parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
if (!parentIsShrinkWrapWidth) {
nsHTMLReflowState reflowState(aReflowState);
reflowState.mComputedWidth = aMetrics.width - borderPadding.left -
borderPadding.right;
reflowState.reason = eReflowReason_Resize;
reflowState.mSpaceManager->ClearRegions();
nscoord oldDesiredWidth = aMetrics.width;
nsBlockReflowState state(reflowState, aState.mPresContext, this, aMetrics,
NS_BLOCK_MARGIN_ROOT & mState);
ReflowDirtyLines(state);
aState.mY = state.mY;
NS_ASSERTION(oldDesiredWidth == aMetrics.width, "bad desired width");
}
}
}
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
PRBool parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
}
// Compute final height
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
// Use style defined height
aMetrics.height = borderPadding.top + aReflowState.mComputedHeight +
borderPadding.bottom;
// When style defines the height use it for the max-element-size
// because we can't shrink any smaller.
maxHeight = aMetrics.height;
// Don't carry out a bottom margin when our height is fixed
// unless the bottom of the last line adjoins the bottom of our
// content area.
if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
if (aState.mY + aState.mPrevBottomMargin != aMetrics.height) {
aState.mPrevBottomMargin = 0;
}
}
}
else {
nscoord autoHeight = aState.mY;
// 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.
// XXX check for a fit
autoHeight += aState.mPrevBottomMargin;
}
autoHeight += borderPadding.bottom;
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxHeight) {
nscoord computedMaxHeight = aReflowState.mComputedMaxHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight > computedMaxHeight) {
autoHeight = computedMaxHeight;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinHeight) {
nscoord computedMinHeight = aReflowState.mComputedMinHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight < computedMinHeight) {
autoHeight = computedMinHeight;
}
}
aMetrics.height = autoHeight;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
maxHeight = aState.mMaxElementSize.height +
borderPadding.top + borderPadding.bottom;
}
}
// Set our desired ascent and descent.
// We need to check for special cases where mAscent is not yet properly set.
// There are two cases to consider: when the first line is a block, or
// when the first line is empty and is followed by a second line that
// is a block (e.g., <td>\n<div>). We need to fetch the ascent of the
// first child of the first non-empty line.
nsLineBox* line = mLines;
// see if this first line is empty. if so, move on to the second line
if (line && (0 == line->GetHeight())) {
line = line->mNext;
}
// see if the line contains a block. if so, fetch the ascent of the block
if (line && line->mFirstChild && line->IsBlock()) {
nsBlockFrame* bf;
nsresult res = line->mFirstChild->QueryInterface(kBlockFrameCID, (void**)&bf);
if (NS_SUCCEEDED(res) && bf) {
mAscent = bf->GetAscent();
}
}
aMetrics.ascent = mAscent;
aMetrics.descent = aMetrics.height - aMetrics.ascent;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
// Store away the final value
aMetrics.maxElementSize->width = maxWidth;
aMetrics.maxElementSize->height = maxHeight;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::CFS: %p returning MES %d\n",
this, aMetrics.maxElementSize->width);
#endif
}
// Return bottom margin information
aMetrics.mCarriedOutBottomMargin =
aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ? 0 : aState.mPrevBottomMargin;
#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_COMPUTEMAXELEMENTSIZE) &&
((maxWidth > aMetrics.width) || (maxHeight > aMetrics.height))) {
ListTag(stdout);
printf(": WARNING: max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.mReflowState.availableWidth,
aState.mReflowState.availableHeight);
}
#endif
#ifdef NOISY_MAX_ELEMENT_SIZE
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, 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)) {
// We need to add in for the right border/padding
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
}
// Compute the combined area of our children
// XXX_perf: This can be done incrementally
nscoord xa = 0, ya = 0, xb = aMetrics.width, yb = aMetrics.height;
if (NS_STYLE_OVERFLOW_HIDDEN != aReflowState.mStyleDisplay->mOverflow) {
nsLineBox* line = mLines;
while (nsnull != line) {
// Compute min and max x/y values for the reflowed frame's
// combined areas
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nscoord x = lineCombinedArea.x;
nscoord y = lineCombinedArea.y;
nscoord xmost = x + lineCombinedArea.width;
nscoord ymost = y + lineCombinedArea.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
line = line->mNext;
}
// 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).
if (mBullet) {
nsRect r;
mBullet->GetRect(r);
if (r.x < xa) xa = r.x;
if (r.y < ya) ya = r.y;
nscoord xmost = r.XMost();
if (xmost > xb) xb = xmost;
nscoord ymost = r.YMost();
if (ymost > yb) yb = ymost;
}
}
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": ca=%d,%d,%d,%d\n", xa, ya, xb-xa, yb-ya);
#endif
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
aMetrics.mOverflowArea.x = xa;
aMetrics.mOverflowArea.y = ya;
aMetrics.mOverflowArea.width = xb - xa;
aMetrics.mOverflowArea.height = yb - ya;
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
nsresult
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
{
PrepareResizeReflow(aState);
return NS_OK;
}
nsresult
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
{
// Determine the line being impacted
PRBool isFloater;
nsLineBox* prevLine;
nsLineBox* line = FindLineFor(aState.mNextRCFrame, &prevLine, &isFloater);
if (nsnull == line) {
// This can't happen, but just in case it does...
return PrepareResizeReflow(aState);
}
// XXX: temporary: If the child frame is a floater then punt
if (isFloater) {
return PrepareResizeReflow(aState);
}
// Figure out which line to mark dirty.
MarkLineDirty(line, prevLine);
return NS_OK;
}
nsresult
nsBlockFrame::MarkLineDirty(nsLineBox* aLine, nsLineBox* aPrevLine)
{
// Mark aLine dirty
aLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark line %p dirty\n", aLine);
}
#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 (aPrevLine && !aPrevLine->IsBlock()) {
aPrevLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark prev-line %p dirty\n", aPrevLine);
}
#endif
}
return NS_OK;
}
nsresult
nsBlockFrame::UpdateBulletPosition(nsBlockReflowState& aState)
{
if (nsnull == mBullet) {
// Don't bother if there is no bullet
return NS_OK;
}
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
if (HaveOutsideBullet()) {
// We now have an inside bullet, but used to have an outside
// bullet. Adjust the frame line list
nsLineBox* line = aState.NewLineBox(mBullet, 1, PR_FALSE);
if (!line) {
return NS_ERROR_OUT_OF_MEMORY;
}
line->mNext = mLines;
mLines = line;
}
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
else {
if (!HaveOutsideBullet()) {
// We now have an outside bullet, but used to have an inside
// bullet. Take the bullet frame out of the first lines frame
// list.
if ((nsnull != mLines) && (mBullet == mLines->mFirstChild)) {
nsIFrame* next;
mBullet->GetNextSibling(&next);
mBullet->SetNextSibling(nsnull);
PRInt32 count = mLines->GetChildCount() - 1;
NS_ASSERTION(count >= 0, "empty line w/o bullet");
mLines->SetChildCount(count);
if (0 == count) {
nsLineBox* nextLine = mLines->mNext;
aState.FreeLineBox(mLines);
mLines = nextLine;
if (nsnull != nextLine) {
nextLine->MarkDirty();
}
}
else {
mLines->mFirstChild = next;
mLines->MarkDirty();
}
}
}
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
nsresult
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
{
nsresult rv = UpdateBulletPosition(aState);
// Mark everything dirty
nsLineBox* line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
return rv;
}
nsresult
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
{
// 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 floater (bug 19579)
aState.GetAvailableSpace();
// See if this is this a constrained resize reflow that is not impacted by floaters
if ((PR_FALSE==aState.IsImpactedByFloater()) &&
(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 = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if ((NS_STYLE_TEXT_ALIGN_LEFT == styleText->mTextAlign) ||
((NS_STYLE_TEXT_ALIGN_DEFAULT == styleText->mTextAlign) &&
(NS_STYLE_DIRECTION_LTR == aState.mReflowState.mStyleDisplay->mDirection))) {
tryAndSkipLines = PR_TRUE;
}
}
#ifdef DEBUG
if (gDisableResizeOpt) {
tryAndSkipLines = PR_FALSE;
}
if (gNoisyReflow) {
if (!tryAndSkipLines) {
const nsStyleText* mStyleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": marking all lines dirty: reason=%d availWidth=%d textAlign=%d\n",
aState.mReflowState.reason,
aState.mReflowState.availableWidth,
mStyleText->mTextAlign);
}
}
#endif
nsLineBox* line = mLines;
if (tryAndSkipLines) {
// The line's bounds are relative to the border edge of the frame
nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left;
if (NS_SHRINKWRAPWIDTH == aState.mReflowState.mComputedWidth) {
newAvailWidth += aState.mReflowState.mComputedMaxWidth;
} else {
newAvailWidth += aState.mReflowState.mComputedWidth;
}
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": trying to avoid marking all lines dirty\n");
}
#endif
PRBool notWrapping = aState.GetFlag(BRS_NOWRAP);
while (nsnull != line) {
if (line->IsBlock()) {
// We have to let child blocks make their own decisions.
line->MarkDirty();
}
else {
// We can avoid reflowing *some* inline lines in some cases.
#ifdef REALLY_NOISY_REFLOW
printf("PrepareResizeReflow thinks line %p is %simpacted by floaters\n",
line, line->IsImpactedByFloater() ? "" : "not ");
#endif
if (notWrapping) {
// When no-wrap is set then the only line-breaking that
// occurs for inline lines is triggered by BR elements or by
// newlines. Therefore, we don't need to reflow the line.
}
else if ((line->mNext && !line->HasBreak()) ||
line->HasFloaters() || line->IsImpactedByFloater() ||
line->HasPercentageChild() ||
(line->mBounds.XMost() > newAvailWidth)) {
// When an inline line has:
//
// - a next line and it doesn't end in a break, or
// - floaters, or
// - is impacted by a floater, or
// - is wider than the new available space
//
// Then we must reflow it.
line->MarkDirty();
}
#ifdef DEBUG
if (gNoisyReflow && !line->IsDirty() && !notWrapping) {
IndentBy(stdout, gNoiseIndent + 1);
printf("skipped: line=%p next=%p %s %s %s%s%s breakType=%d xmost=%d\n",
line, line->mNext,
line->IsBlock() ? "block" : "inline",
aState.GetFlag(BRS_NOWRAP) ? "no-wrap" : "wrapping",
line->HasBreak() ? "has-break " : "",
line->HasFloaters() ? "has-floaters " : "",
line->IsImpactedByFloater() ? "impacted " : "",
line->GetBreakType(),
line->mBounds.XMost());
}
#endif
}
line = line->mNext;
}
}
else {
// Mark everything dirty
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
}
return NS_OK;
}
//----------------------------------------
nsLineBox*
nsBlockFrame::FindLineFor(nsIFrame* aFrame,
nsLineBox** aPrevLineResult,
PRBool* aIsFloaterResult)
{
nsLineBox* prevLine = nsnull;
nsLineBox* line = mLines;
PRBool isFloater = PR_FALSE;
while (nsnull != line) {
if (line->Contains(aFrame)) {
break;
}
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
if (aFrame == fc->mPlaceholder->GetOutOfFlowFrame()) {
isFloater = PR_TRUE;
goto done;
}
fc = fc->Next();
}
}
prevLine = line;
line = line->mNext;
}
done:
*aIsFloaterResult = isFloater;
*aPrevLineResult = prevLine;
return line;
}
void
nsBlockFrame::RecoverStateFrom(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aDeltaY,
nsRect* aDamageRect)
{
PRBool applyTopMargin = PR_FALSE;
if (aLine->IsBlock()) {
nsIFrame* framePrevInFlow;
aLine->mFirstChild->GetPrevInFlow(&framePrevInFlow);
if (nsnull == framePrevInFlow) {
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
}
}
aState.RecoverStateFrom(aLine, applyTopMargin, aDeltaY, aDamageRect);
}
/**
* Propogate reflow "damage" from the just reflowed line (aLine) to
* any subsequent lines that were affected. The only thing that causes
* damage is a change to the impact that floaters make.
*/
void
nsBlockFrame::PropogateReflowDamage(nsBlockReflowState& aState,
nsLineBox* aLine,
const nsRect& aOldCombinedArea,
nscoord aDeltaY)
{
// See if the line has a relevant combined area, and if it does if
// the combined area has changed.
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if (lineCombinedArea != aLine->mBounds) {
if (lineCombinedArea != aOldCombinedArea) {
// The line's combined-area changed. Therefore we need to damage
// the lines below that were previously (or are now) impacted by
// the change. It's possible that a floater shrunk or grew so
// use the larger of the impacted area.
nscoord newYMost = lineCombinedArea.YMost();
nscoord oldYMost = aOldCombinedArea.YMost();
nscoord impactYB = newYMost < oldYMost ? oldYMost : newYMost;
nscoord impactYA = lineCombinedArea.y;
// Loop over each subsequent line and mark them dirty if they
// intersect the impacted area. Note: we cannot stop after the
// first non-intersecting line because lines might be
// overlapping because of negative margins.
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
nscoord lineYA = next->mBounds.y + aDeltaY;
nscoord lineYB = lineYA + next->mBounds.height;
if ((lineYB >= impactYA) && (lineYA < impactYB)) {
next->MarkDirty();
}
next = next->mNext;
}
}
else {
// The line's combined area didn't change from last
// time. Therefore just sliding subsequent lines will work.
return;
}
}
if (aDeltaY) {
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
if (!next->IsDirty()) {
// Cases we need to find:
//
// 1. the line was impacted by a floater and now isn't
// 2. the line wasn't impacted by a floater and now is
//
//XXXPerf: An optimization: if the line was and is completely
//impacted by a floater and the floater hasn't changed size,
//then we don't need to mark the line dirty.
aState.GetAvailableSpace(next->mBounds.y + aDeltaY);
PRBool wasImpactedByFloater = next->IsImpactedByFloater();
PRBool isImpactedByFloater = aState.IsImpactedByFloater() ? PR_TRUE : PR_FALSE;
#ifdef REALLY_NOISY_REFLOW
printf("nsBlockFrame::PropogateReflowDamage %p was = %d, is=%d\n",
this, wasImpactedByFloater, isImpactedByFloater);
#endif
if (wasImpactedByFloater != isImpactedByFloater) {
next->MarkDirty();
}
else if (isImpactedByFloater) {
//XXX: Maybe the floater itself changed size?
if (next->IsBlock()) {
//XXXPerf
// Case:
// It's possible that more/less of the line is impacted by
// the floater than last time. So reflow.
next->MarkDirty();
}
}
}
next = next->mNext;
}
}
}
static PRBool
WrappedLinesAreDirty(nsLineBox* aLine)
{
if (aLine->IsInline()) {
while (aLine->IsLineWrapped()) {
aLine = aLine->mNext;
if (!aLine) {
break;
}
NS_ASSERTION(!aLine->IsBlock(), "didn't expect a block line");
if (aLine->IsDirty()) {
// we found a continuing line that is dirty
return PR_TRUE;
}
}
}
return PR_FALSE;
}
PRBool nsBlockFrame::IsIncrementalDamageConstrained(const nsBlockReflowState& aState) const
{
// see if the reflow will go through a text control. if so, we can optimize
// because we know the text control won't change size.
if (aState.mReflowState.reflowCommand)
{
nsIFrame *target;
aState.mReflowState.reflowCommand->GetTarget(target);
while (target)
{ // starting with the target's parent, scan for a text control
nsIFrame *parent;
target->GetParent(&parent);
if ((nsIFrame*)this==parent || !parent) // the null check is paranoia, it should never happen
break; // we found ourself, so we know there's no text control between us and target
nsCOMPtr<nsIAtom> frameType;
parent->GetFrameType(getter_AddRefs(frameType));
if (frameType)
{
if (nsLayoutAtoms::textInputFrame == frameType.get())
return PR_TRUE; // damage is constrained to the text control innards
}
target = parent; // advance the loop up the frame tree
}
}
return PR_FALSE; // default case, damage is not constrained (or unknown)
}
/**
* Reflow the dirty lines
*/
nsresult
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
{
nsresult rv = NS_OK;
PRBool keepGoing = PR_TRUE;
#ifdef DEBUG
if (gNoisyReflow) {
if (aState.mReflowState.reason == eReflowReason_Incremental) {
nsIReflowCommand::ReflowType type;
aState.mReflowState.reflowCommand->GetType(type);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": incrementally reflowing dirty lines: type=%s(%d) isInline=%s",
kReflowCommandType[type], type,
aState.GetFlag(BRS_ISINLINEINCRREFLOW) ? "true" : "false");
}
else {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": reflowing dirty lines");
}
printf(" computedWidth=%d\n", aState.mReflowState.mComputedWidth);
gNoiseIndent++;
}
#endif
// Check whether this is an incremental reflow
PRBool incrementalReflow = aState.mReflowState.reason ==
eReflowReason_Incremental ||
aState.mReflowState.reason ==
eReflowReason_Dirty;
nscoord deltaY = 0;
// Reflow the lines that are already ours
aState.mPrevLine = nsnull;
nsLineBox* line = mLines;
if (aState.GetFlag(BRS_ISINLINEINCRREFLOW) && aState.mNextRCFrame)
{
const nsLineBox* incrTargetLine = aState.mCurrentLine;
aState.mCurrentLine = line;
aState.mPrevLine = nsnull;
while (line && (line != incrTargetLine))
{
nsRect damageRect;
RecoverStateFrom(aState, line, deltaY, incrementalReflow ?
&damageRect : 0);
if (incrementalReflow && !damageRect.IsEmpty()) {
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 4 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
Invalidate(aState.mPresContext, damageRect);
}
aState.mPrevLine = line;
line = line->mNext;
aState.AdvanceToNextLine();
}
}
while (nsnull != line) {
#ifdef DEBUG
if (gNoisyReflow) {
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d dirty=%s oldBounds={%d,%d,%d,%d} oldCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
line, aState.mY, line->IsDirty() ? "yes" : "no",
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin);
gNoiseIndent++;
}
#endif
// If we're supposed to update our maximum width, then we'll also need to
// reflow this line if it's line wrapped and any of the continuing lines
// are dirty
if (line->IsDirty() || (aState.GetFlag(BRS_COMPUTEMAXWIDTH) && ::WrappedLinesAreDirty(line))) {
// Compute the dirty lines "before" YMost, after factoring in
// the running deltaY value - the running value is implicit in
// aState.mY.
nscoord oldHeight = line->mBounds.height;
nsRect oldCombinedArea;
line->GetCombinedArea(&oldCombinedArea);
// Reflow the dirty line. If it's an incremental reflow, then force
// it to invalidate the dirty area if necessary
PRBool forceInvalidate = PR_FALSE;
if (incrementalReflow) {
forceInvalidate = !IsIncrementalDamageConstrained(aState);
}
rv = ReflowLine(aState, line, &keepGoing, forceInvalidate);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
DeleteLine(aState, line);
}
break;
}
nscoord newHeight = line->mBounds.height;
deltaY += newHeight - oldHeight;
// If the next line is clean then check and see if reflowing the
// current line "damaged" the next line. Damage occurs when the
// current line contains floaters that intrude upon the
// subsequent lines.
nsLineBox* next = line->mNext;
if ((nsnull != next) && !next->IsDirty()) {
PropogateReflowDamage(aState, line, oldCombinedArea, deltaY);
}
}
else {
// XXX what if the slid line doesn't fit because we are in a
// vertically constrained situation?
// Recover state as if we reflowed this line
nsRect damageRect;
RecoverStateFrom(aState, line, deltaY, incrementalReflow ?
&damageRect : 0);
if (incrementalReflow && !damageRect.IsEmpty()) {
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 5 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
Invalidate(aState.mPresContext, damageRect);
}
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d newBounds={%d,%d,%d,%d} newCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
line, aState.mY,
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin);
}
#endif
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.AdvanceToNextLine();
}
// Pull data from a next-in-flow if we can
while (keepGoing && (nsnull != aState.mNextInFlow)) {
// Grab first line from our next-in-flow
line = aState.mNextInFlow->mLines;
if (nsnull == line) {
aState.mNextInFlow = (nsBlockFrame*) aState.mNextInFlow->mNextInFlow;
continue;
}
// XXX See if the line is not dirty; if it's not maybe we can
// avoid the pullup if it can't fit?
aState.mNextInFlow->mLines = line->mNext;
line->mNext = nsnull;
if (0 == line->GetChildCount()) {
// The line is empty. Try the next one.
NS_ASSERTION(nsnull == line->mFirstChild, "bad empty line");
aState.FreeLineBox(line);
continue;
}
// XXX move to a subroutine: run-in, overflow, pullframe and this do this
// Make the children in the line ours.
nsIFrame* frame = line->mFirstChild;
nsIFrame* lastFrame = nsnull;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, mNextInFlow, this);
lastFrame = frame;
frame->GetNextSibling(&frame);
}
lastFrame->SetNextSibling(nsnull);
// Add line to our line list
if (nsnull == aState.mPrevLine) {
NS_ASSERTION(nsnull == mLines, "bad aState.mPrevLine");
mLines = line;
}
else {
NS_ASSERTION(nsnull == aState.mPrevLine->mNext, "bad aState.mPrevLine");
aState.mPrevLine->mNext = line;
aState.mPrevChild->SetNextSibling(line->mFirstChild);
}
// Now reflow it and any lines that it makes during it's reflow
// (we have to loop here because reflowing the line may case a new
// line to be created; see SplitLine's callers for examples of
// when this happens).
while (nsnull != line) {
rv = ReflowLine(aState, line, &keepGoing, incrementalReflow ?
PR_TRUE : PR_FALSE);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
DeleteLine(aState, line);
}
break;
}
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.AdvanceToNextLine();
}
}
// Handle an odd-ball case: a list-item with no lines
if (mBullet && HaveOutsideBullet() && !mLines) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// There are no lines so we have to fake up some y motion so that
// we end up with *some* height.
aState.mY += metrics.height;
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": done reflowing dirty lines (status=%x)\n",
aState.mReflowStatus);
}
#endif
return rv;
}
void
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
nsLineBox* aLine)
{
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
if (0 == aLine->GetChildCount()) {
if (nsnull == aState.mPrevLine) {
NS_ASSERTION(aLine == mLines, "huh");
mLines = nsnull;
}
else {
NS_ASSERTION(aState.mPrevLine->mNext == aLine, "bad prev-line");
aState.mPrevLine->mNext = aLine->mNext;
}
aState.FreeLineBox(aLine);
}
}
/**
* Reflow a line. The line will either contain a single block frame
* or contain 1 or more inline frames. aKeepReflowGoing indicates
* whether or not the caller should continue to reflow more lines.
*/
nsresult
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRBool aDamageDirtyArea)
{
nsresult rv = NS_OK;
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "reflowing empty line");
// Setup the line-layout for the new line
aState.mCurrentLine = aLine;
aLine->ClearDirty();
// Now that we know what kind of line we have, reflow it
nsRect oldCombinedArea;
aLine->GetCombinedArea(&oldCombinedArea);
if (aLine->IsBlock()) {
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
// We expect blocks to damage any area inside their bounds that is
// dirty; however, if the frame changes size or position then we
// need to do some repainting
if (aDamageDirtyArea) {
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if ((oldCombinedArea.x != lineCombinedArea.x) ||
(oldCombinedArea.y != lineCombinedArea.y)) {
// The block has moved, and so to be safe we need to repaint
// XXX We need to improve on this...
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, lineCombinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 6 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
Invalidate(aState.mPresContext, dirtyRect);
} else {
if (oldCombinedArea.width != lineCombinedArea.width) {
nsRect dirtyRect;
// Just damage the vertical strip that was either added or went
// away
dirtyRect.x = PR_MIN(oldCombinedArea.XMost(),
lineCombinedArea.XMost());
dirtyRect.y = lineCombinedArea.y;
dirtyRect.width = PR_MAX(oldCombinedArea.XMost(),
lineCombinedArea.XMost()) -
dirtyRect.x;
dirtyRect.height = PR_MAX(oldCombinedArea.height,
lineCombinedArea.height);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 7 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
Invalidate(aState.mPresContext, dirtyRect);
}
if (oldCombinedArea.height != lineCombinedArea.height) {
nsRect dirtyRect;
// Just damage the horizontal strip that was either added or went
// away
dirtyRect.x = lineCombinedArea.x;
dirtyRect.y = PR_MIN(oldCombinedArea.YMost(),
lineCombinedArea.YMost());
dirtyRect.width = PR_MAX(oldCombinedArea.width,
lineCombinedArea.width);
dirtyRect.height = PR_MAX(oldCombinedArea.YMost(),
lineCombinedArea.YMost()) -
dirtyRect.y;
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 8 (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
Invalidate(aState.mPresContext, dirtyRect);
}
}
}
}
else {
aLine->SetLineWrapped(PR_FALSE);
// If we're supposed to update the maximum width, then we'll need to reflow
// the line with an unconstrained width (which will give us the new maximum
// width), then we'll reflow it again with the constrained width.
// We only do this if this is a beginning line, i.e., don't do this for
// lines associated with content that line wrapped (see ReflowDirtyLines()
// for details).
// XXX This approach doesn't work when floaters are involved in which case
// we'll either need to recover the floater state that applies to the
// unconstrained reflow or keep it around in a separate space manager...
PRBool isBeginningLine = !aState.mPrevLine || !aState.mPrevLine->IsLineWrapped();
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH) && isBeginningLine) {
nscoord oldY = aState.mY;
nscoord oldPrevBottomMargin = aState.mPrevBottomMargin;
PRBool oldUnconstrainedWidth = aState.GetFlag(BRS_UNCONSTRAINEDWIDTH);
// First reflow the line with an unconstrained width. When doing this
// we need to set the block reflow state's "mUnconstrainedWidth" variable
// to PR_TRUE so if we encounter a placeholder and then reflow its
// associated floater we don't end up resetting the line's right edge and
// have it think the width is unconstrained...
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, PR_TRUE);
ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea, PR_TRUE);
aState.mY = oldY;
aState.mPrevBottomMargin = oldPrevBottomMargin;
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, oldUnconstrainedWidth);
// Update the line's maximum width
aLine->mMaximumWidth = aLine->mBounds.XMost();
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
// Remove any floaters associated with the line from the space
// manager
aLine->RemoveFloatersFromSpaceManager(aState.mSpaceManager);
// Now reflow the line again this time without having it compute
// the maximum width or max-element-size.
// Note: we need to reset both member variables, because the inline
// code examines mComputeMaxElementSize and if there is a placeholder
// on this line the code to reflow the floater looks at both...
nscoord oldComputeMaxElementSize = aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE);
nscoord oldComputeMaximumWidth = aState.GetFlag(BRS_COMPUTEMAXWIDTH);
aState.SetFlag(BRS_COMPUTEMAXELEMENTSIZE, PR_FALSE);
aState.SetFlag(BRS_COMPUTEMAXWIDTH, PR_FALSE);
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea);
aState.SetFlag(BRS_COMPUTEMAXELEMENTSIZE, oldComputeMaxElementSize);
aState.SetFlag(BRS_COMPUTEMAXWIDTH, oldComputeMaximumWidth);
} else {
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing, aDamageDirtyArea);
if (NS_SUCCEEDED(rv))
{
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH))
{
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
}
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE))
{
#ifdef NOISY_MAX_ELEMENT_SIZE
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaxElementWidth to %d\n",
this, aLine, aLine->mMaxElementWidth);
#endif
aState.UpdateMaxElementSize(nsSize(aLine->mMaxElementWidth, aLine->mBounds.height));
}
}
}
// We don't really know what changed in the line, so use the union
// of the old and new combined areas
if (aDamageDirtyArea) {
nsRect combinedArea;
aLine->GetCombinedArea(&combinedArea);
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, combinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate because aDamageDirtyArea is true (%d, %d, %d, %d)\n",
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
#endif
Invalidate(aState.mPresContext, dirtyRect);
}
}
return rv;
}
/**
* Pull frame from the next available location (one of our lines or
* one of our next-in-flows lines).
*/
nsresult
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool aDamageDeletedLines,
nsIFrame*& aFrameResult)
{
nsresult rv = NS_OK;
PRBool stopPulling;
aFrameResult = nsnull;
// First check our remaining lines
while (nsnull != aLine->mNext) {
rv = PullFrame(aState, aLine, &aLine->mNext, PR_FALSE, aDamageDeletedLines,
aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
// Pull frames from the next-in-flow(s) until we can't
nsBlockFrame* nextInFlow = aState.mNextInFlow;
while (nsnull != nextInFlow) {
nsLineBox* line = nextInFlow->mLines;
if (nsnull == line) {
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
aState.mNextInFlow = nextInFlow;
continue;
}
rv = PullFrame(aState, aLine, &nextInFlow->mLines, PR_TRUE, aDamageDeletedLines,
aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
return rv;
}
/**
* Try to pull a frame out of a line pointed at by aFromList. If a
* frame is pulled then aPulled will be set to PR_TRUE. In addition,
* 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 floater from the
* line's floater 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.
*/
nsresult
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsLineBox** aFromList,
PRBool aUpdateGeometricParent,
PRBool aDamageDeletedLines,
nsIFrame*& aFrameResult,
PRBool& aStopPulling)
{
nsLineBox* fromLine = *aFromList;
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");
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.
aStopPulling = PR_TRUE;
aFrameResult = nsnull;
}
else {
// Take frame from fromLine
nsIFrame* frame = fromLine->mFirstChild;
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();
frame->GetNextSibling(&fromLine->mFirstChild);
}
else {
// Free up the fromLine now that it's empty
// Its bounds might need to be redrawn, though.
if (aDamageDeletedLines) {
Invalidate(aState.mPresContext, fromLine->mBounds);
}
*aFromList = fromLine->mNext;
aState.FreeLineBox(fromLine);
}
// Change geometric parents
if (aUpdateGeometricParent) {
// Before we set the new parent frame get the current parent
nsIFrame* oldParentFrame;
frame->GetParent(&oldParentFrame);
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
NS_ASSERTION(oldParentFrame != this, "unexpected parent frame");
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, oldParentFrame, this);
// The frame is being pulled from a next-in-flow; therefore we
// need to add it to our sibling list.
if (nsnull != aState.mPrevChild) {
aState.mPrevChild->SetNextSibling(frame);
}
frame->SetNextSibling(nsnull);
}
// Stop pulling because we found a frame to pull
aStopPulling = PR_TRUE;
aFrameResult = frame;
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
}
return NS_OK;
}
static void
PlaceFrameView(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIView* view;
aFrame->GetView(aPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aFrame, view, nsnull);
} else {
nsContainerFrame::PositionChildViews(aPresContext, aFrame);
}
}
void
nsBlockFrame::SlideLine(nsBlockReflowState& aState,
nsLineBox* aLine, nscoord aDY)
{
// Adjust line state
aLine->SlideBy(aDY);
// Adjust the frames in the line
nsIFrame* kid = aLine->mFirstChild;
if (!kid) {
return;
}
if (aLine->IsBlock()) {
nsRect r;
kid->GetRect(r);
if (aDY) {
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**) &bf);
if (NS_SUCCEEDED(rv)) {
// Translate spacemanager to the child blocks upper-left corner
// so that when it places its floaters (which are relative to
// it) the right coordinates are used. Note that we have already
// been translated by our border+padding so factor that in to
// get the right translation.
const nsMargin& bp = aState.BorderPadding();
nscoord dx = r.x - bp.left;
nscoord dy = r.y - bp.top;
aState.mSpaceManager->Translate(dx, dy);
bf->UpdateSpaceManager(aState.mPresContext, aState.mSpaceManager);
aState.mSpaceManager->Translate(-dx, -dy);
}
}
else {
// Adjust the Y coordinate of the frames in the line.
// Note: we need to re-position views even if aDY is 0, because
// one of our parent frames may have moved and so the view's position
// relative to its parent may have changed
nsRect r;
PRInt32 n = aLine->GetChildCount();
while (--n >= 0) {
if (aDY) {
kid->GetRect(r);
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
kid->GetNextSibling(&kid);
}
}
}
nsresult
nsBlockFrame::UpdateSpaceManager(nsIPresContext* aPresContext,
nsISpaceManager* aSpaceManager)
{
nsLineBox* line = mLines;
while (nsnull != line) {
// Place the floaters in the spacemanager
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
aSpaceManager->AddRectRegion(floater, fc->mRegion);
#ifdef NOISY_SPACEMANAGER
nscoord tx, ty;
aSpaceManager->GetTranslation(tx, ty);
nsFrame::ListTag(stdout, this);
printf(": UpdateSpaceManager: AddRectRegion: txy=%d,%d {%d,%d,%d,%d}\n",
tx, ty,
fc->mRegion.x, fc->mRegion.y,
fc->mRegion.width, fc->mRegion.height);
#endif
fc = fc->Next();
}
}
// Tell kids about the move too
if (line->mFirstChild && line->IsBlock()) {
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = line->mFirstChild->QueryInterface(kBlockFrameCID,
(void**) &bf);
if (NS_SUCCEEDED(rv)) {
nsPoint origin;
bf->GetOrigin(origin);
// Translate spacemanager to the child blocks upper-left
// corner so that when it places its floaters (which are
// relative to it) the right coordinates are used.
aSpaceManager->Translate(origin.x, origin.y);
bf->UpdateSpaceManager(aPresContext, aSpaceManager);
aSpaceManager->Translate(-origin.x, -origin.y);
}
}
line = line->mNext;
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint)
{
nsresult rv = nsBlockFrameSuper::AttributeChanged(aPresContext, aChild,
aNameSpaceID, aAttribute, aHint);
if (NS_OK != rv) {
return rv;
}
if (nsHTMLAtoms::start == aAttribute) {
// XXX Not sure if this is necessary anymore
RenumberLists(aPresContext);
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIReflowCommand* reflowCmd;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ContentChanged,
nsnull,
aAttribute);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
else if (nsHTMLAtoms::value == aAttribute) {
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
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.
while (nextAncestor != nsnull) {
if (NS_OK == nextAncestor->QueryInterface(kBlockFrameCID,
(void**)&blockParent)) {
break;
}
nextAncestor->GetParent(&nextAncestor);
}
// Tell the enclosing block frame to renumber list items within
// itself
if (nsnull != blockParent) {
// XXX Not sure if this is necessary anymore
blockParent->RenumberLists(aPresContext);
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIReflowCommand* reflowCmd;
rv = NS_NewHTMLReflowCommand(&reflowCmd, blockParent,
nsIReflowCommand::ContentChanged,
nsnull,
aAttribute);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
}
}
return rv;
}
nsBlockFrame*
nsBlockFrame::FindFollowingBlockFrame(nsIFrame* aFrame)
{
nsBlockFrame* followingBlockFrame = nsnull;
nsIFrame* frame = aFrame;
for (;;) {
nsIFrame* nextFrame;
frame->GetNextSibling(&nextFrame);
if (nsnull != nextFrame) {
const nsStyleDisplay* display;
nextFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
followingBlockFrame = (nsBlockFrame*) nextFrame;
break;
}
else if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
// If it's a text-frame and it's just whitespace and we are
// in a normal whitespace situation THEN skip it and keep
// going...
// XXX WRITE ME!
}
frame = nextFrame;
}
else
break;
}
return followingBlockFrame;
}
PRBool
nsBlockFrame::ShouldApplyTopMargin(nsBlockReflowState& aState,
nsLineBox* aLine)
{
if (aState.GetFlag(BRS_APPLYTOPMARGIN)) {
// Apply short-circuit check to avoid searching the line list
return PR_TRUE;
}
if (!aState.IsAdjacentWithTop()) {
// If we aren't at the top Y coordinate then something of non-zero
// height must have been placed. Therefore the childs top-margin
// applies.
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
return PR_TRUE;
}
// Determine if this line is "essentially" the first line
nsLineBox* line = mLines;
while (line != aLine) {
if (line->IsBlock()) {
// A line which preceeds aLine contains a block; therefore the
// top margin applies.
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
return PR_TRUE;
}
else if (line->HasFloaters()) {
// A line which preceeds aLine is not empty therefore the top
// margin applies.
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
return PR_TRUE;
}
line = line->mNext;
}
// The line being reflowed is "essentially" the first line in the
// block. Therefore its top-margin will be collapsed by the
// generational collapsing logic with its parent (us).
return PR_FALSE;
}
nsIFrame*
nsBlockFrame::GetTopBlockChild()
{
nsIFrame* firstChild = mLines ? mLines->mFirstChild : nsnull;
if (firstChild) {
if (mLines->IsBlock()) {
// Winner
return firstChild;
}
// If the first line is not a block line then the second line must
// be a block line otherwise the top child can't be a block.
nsLineBox* next = mLines->mNext;
if ((nsnull == next) || !next->IsBlock()) {
// There is no line after the first line or its not a block so
// don't bother trying to skip over the first line.
return nsnull;
}
// The only time we can skip over the first line and pretend its
// not there is if the line contains only compressed
// whitespace. If white-space is significant to this frame then we
// can't skip over the line.
const nsStyleText* styleText;
GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) styleText);
if ((NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace)) {
// Whitespace is significant
return nsnull;
}
// See if each frame is a text frame that contains nothing but
// whitespace.
PRInt32 n = mLines->GetChildCount();
while (--n >= 0) {
nsIContent* content;
nsresult rv = firstChild->GetContent(&content);
if (NS_FAILED(rv) || (nsnull == content)) {
return nsnull;
}
nsITextContent* tc;
rv = content->QueryInterface(kITextContentIID, (void**) &tc);
NS_RELEASE(content);
if (NS_FAILED(rv) || (nsnull == tc)) {
return nsnull;
}
PRBool isws = PR_FALSE;
tc->IsOnlyWhitespace(&isws);
NS_RELEASE(tc);
if (!isws) {
return nsnull;
}
firstChild->GetNextSibling(&firstChild);
}
// If we make it to this point then every frame on the first line
// was compressible white-space. Since we already know that the
// second line contains a block, that block is the
// top-block-child.
return next->mFirstChild;
}
return nsnull;
}
nsresult
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing)
{
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
nsresult rv = NS_OK;
nsIFrame* frame = aLine->mFirstChild;
// Prepare the block reflow engine
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE),
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
brc.SetNextRCFrame(aState.mNextRCFrame);
// See if we should apply the top margin. If the block frame being
// reflowed is a continuation (non-null prev-in-flow) then we don't
// apply its top margin because its not significant. Otherwise, dig
// deeper.
PRBool applyTopMargin = PR_FALSE;
nsIFrame* framePrevInFlow;
frame->GetPrevInFlow(&framePrevInFlow);
if (nsnull == framePrevInFlow) {
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
}
// Clear past floaters before the block if the clear style is not none
PRUint8 breakType = display->mBreakType;
aLine->SetBreakType(breakType);
if (NS_STYLE_CLEAR_NONE != breakType) {
PRBool alsoApplyTopMargin = aState.ClearPastFloaters(breakType);
if (alsoApplyTopMargin) {
applyTopMargin = PR_TRUE;
}
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": y=%d child ", aState.mY);
ListTag(stdout, frame);
printf(" has clear of %d => %s, mPrevBottomMargin=%d\n",
breakType,
applyTopMargin ? "applyTopMargin" : "nope",
aState.mPrevBottomMargin);
#endif
}
nscoord topMargin = 0;
if (applyTopMargin) {
// Precompute the blocks top margin value so that we can get the
// correct available space (there might be a floater that's
// already been placed below the aState.mPrevBottomMargin
// Setup a reflowState to get the style computed margin-top value
// The availSpace here is irrelevant to our needs - all we want
// out if this setup is the margin-top value which doesn't depend
// on the childs available space.
nsSize availSpace(aState.mContentArea.width, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
frame, availSpace);
// Now compute the collapsed margin-top value
topMargin =
nsBlockReflowContext::ComputeCollapsedTopMargin(aState.mPresContext,
reflowState);
// And collapse it with the previous bottom margin to get the final value
topMargin =
nsBlockReflowContext::MaxMargin(topMargin, aState.mPrevBottomMargin);
// Temporarily advance the running Y value so that the
// GetAvailableSpace method will return the right available
// space. This undone as soon as the margin is computed.
aState.mY += topMargin;
}
// Compute the available space for the block
aState.GetAvailableSpace();
#ifdef REALLY_NOISY_REFLOW
printf("setting line %p isImpacted to %s\n", aLine, aState.IsImpactedByFloater()?"true":"false");
#endif
PRBool isImpacted = aState.IsImpactedByFloater() ? PR_TRUE : PR_FALSE;
aLine->SetLineIsImpactedByFloater(isImpacted);
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
frame->IsSplittable(splitType);
nsRect availSpace;
aState.ComputeBlockAvailSpace(frame, splitType, display, availSpace);
// Now put the Y coordinate back and flow the block letting the
// block reflow context compute the same top margin value we just
// computed (sigh).
if (topMargin) {
aState.mY -= topMargin;
availSpace.y -= topMargin;
if (NS_UNCONSTRAINEDSIZE != availSpace.height) {
availSpace.height += topMargin;
}
}
// Reflow the block into the available space
nsReflowStatus frameReflowStatus=NS_FRAME_COMPLETE;
nsMargin computedOffsets;
rv = brc.ReflowBlock(frame, availSpace,
applyTopMargin, aState.mPrevBottomMargin,
aState.IsAdjacentWithTop(),
computedOffsets, frameReflowStatus);
if (PR_TRUE==brc.BlockShouldInvalidateItself()) {
Invalidate(aState.mPresContext, mRect);
}
if (frame == aState.mNextRCFrame) {
// NULL out mNextRCFrame so if we reflow it again we don't think it's still
// an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
aState.mPrevChild = frame;
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_TRUE, frameReflowStatus);
#endif
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// None of the child block fits.
PushLines(aState);
*aKeepReflowGoing = PR_FALSE;
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
else {
// Note: line-break-after a block is a nop
// Try to place the child block
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
nscoord collapsedBottomMargin;
nsRect combinedArea(0,0,0,0);
*aKeepReflowGoing = brc.PlaceBlock(isAdjacentWithTop, computedOffsets,
&collapsedBottomMargin,
aLine->mBounds, combinedArea);
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Mark the line as block so once we known the final shrink wrap width
// we can reflow the block to the correct size
// XXX We don't always need to do this...
aLine->MarkDirty();
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
}
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) || aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Add the right margin to the line's bounnds. That way it will be taken into
// account when we compute our shrink wrap size
nscoord marginRight = brc.GetMargin().right;
if (marginRight != NS_UNCONSTRAINEDSIZE) {
aLine->mBounds.width += marginRight;
}
}
aLine->SetCombinedArea(combinedArea);
if (*aKeepReflowGoing) {
// Some of the child block fit
// Advance to new Y position
nscoord newY = aLine->mBounds.YMost();
aState.mY = newY;
aLine->SetCarriedOutBottomMargin(brc.GetCarriedOutBottomMargin());
// Continue the block frame now if it didn't completely fit in
// the available space.
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, frame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Push continuation to a new line, but only if we actually
// made one.
if (madeContinuation) {
frame->GetNextSibling(&frame);
nsLineBox* line = aState.NewLineBox(frame, 1, PR_TRUE);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
line->mNext = aLine->mNext;
aLine->mNext = line;
// Do not count the continuation child on the line it used
// to be on
aLine->SetChildCount(aLine->GetChildCount() - 1);
}
// Advance to next line since some of the block fit. That way
// only the following lines will be pushed.
aState.mPrevLine = aLine;
PushLines(aState);
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
*aKeepReflowGoing = PR_FALSE;
// The bottom margin for a block is only applied on the last
// flow block. Since we just continued the child block frame,
// we know that line->mFirstChild is not the last flow block
// therefore zero out the running margin value.
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": reflow incomplete, frame=");
nsFrame::ListTag(stdout, frame);
printf(" prevBottomMargin=%d, setting to zero\n",
aState.mPrevBottomMargin);
#endif
aState.mPrevBottomMargin = 0;
}
else {
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": reflow complete for ");
nsFrame::ListTag(stdout, frame);
printf(" prevBottomMargin=%d collapsedBottomMargin=%d\n",
aState.mPrevBottomMargin, collapsedBottomMargin);
#endif
aState.mPrevBottomMargin = collapsedBottomMargin;
}
#ifdef NOISY_VERTICAL_MARGINS
ListTag(stdout);
printf(": frame=");
nsFrame::ListTag(stdout, frame);
printf(" carriedOutBottomMargin=%d collapsedBottomMargin=%d => %d\n",
aLine->GetCarriedOutBottomMargin(), collapsedBottomMargin,
aState.mPrevBottomMargin);
#endif
// Post-process the "line"
nsSize maxElementSize(0, 0);
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
maxElementSize = brc.GetMaxElementSize();
if (aState.IsImpactedByFloater() &&
(NS_FRAME_SPLITTABLE_NON_RECTANGULAR != splitType)) {
// Add in floater impacts to the lines max-element-size, but
// only if the block element isn't one of us (otherwise the
// floater impacts will be counted twice).
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
}
}
// If we asked the block to update its maximum width, then record the
// updated value in the line, and update the current maximum width
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
aLine->mMaximumWidth = brc.GetMaximumWidth();
// need to add in margin on block's reported max width (see bug 35964)
const nsMargin& margin = brc.GetMargin();
aLine->mMaximumWidth += margin.left + margin.right;
#ifdef NOISY_MAXIMUM_WIDTH
printf("nsBlockFrame::ReflowBlockFrame parent block %p line %p aLine->mMaximumWidth set to brc.GetMaximumWidth %d, updating aState.mMaximumWidth\n",
this, aLine, aLine->mMaximumWidth);
#endif
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
}
PostPlaceLine(aState, aLine, maxElementSize);
// Place the "marker" (bullet) frame.
//
// 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>... ). This is where
// the second case can happen.
if (HaveOutsideBullet() &&
((aLine == mLines) ||
((0 == mLines->mBounds.height) && (aLine == mLines->mNext)))) {
// Reflow the bullet
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// For bullets that are placed next to a child block, there will
// be no correct ascent value. Therefore, make one up...
nscoord ascent = 0;
const nsStyleFont* font;
frame->GetStyleData(eStyleStruct_Font,
(const nsStyleStruct*&) font);
nsIRenderingContext& rc = *aState.mReflowState.rendContext;
rc.SetFont(font->mFont);
nsIFontMetrics* fm;
rv = rc.GetFontMetrics(fm);
if (NS_SUCCEEDED(rv) && (nsnull != fm)) {
fm->GetMaxAscent(ascent);
NS_RELEASE(fm);
}
rv = NS_OK;
// Tall bullets won't look particularly nice here...
nsRect bbox;
mBullet->GetRect(bbox);
nscoord bulletTopMargin = applyTopMargin ? collapsedBottomMargin : 0;
bbox.y = aState.BorderPadding().top + ascent -
metrics.ascent + bulletTopMargin;
mBullet->SetRect(aState.mPresContext, bbox);
}
}
else {
// None of the block fits. Determine the correct reflow status.
if (aLine == mLines) {
// If it's our very first line then we need to be pushed to
// our parents next-in-flow. Therefore, return break-before
// status for our reflow status.
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
}
else {
// Push the line that didn't fit and any lines that follow it
// to our next-in-flow.
PushLines(aState);
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
}
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return rv;
}
#define LINE_REFLOW_OK 0
#define LINE_REFLOW_STOP 1
#define LINE_REFLOW_REDO 2
nsresult
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRBool aDamageDirtyArea,
PRBool aUpdateMaximumWidth)
{
nsresult rv = NS_OK;
*aKeepReflowGoing = PR_TRUE;
#ifdef DEBUG
PRInt32 spins = 0;
#endif
PRUint8 lineReflowStatus = LINE_REFLOW_REDO;
while (LINE_REFLOW_REDO == lineReflowStatus) {
// Prevent overflowing limited thread stacks by creating
// nsLineLayout from the heap when the frame tree depth gets
// large.
if (aState.mReflowState.mReflowDepth > 30) {//XXX layout-tune.h?
rv = DoReflowInlineFramesMalloc(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
}
else {
rv = DoReflowInlineFramesAuto(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
}
if (NS_FAILED(rv)) {
break;
}
#ifdef DEBUG
spins++;
if (1000 == spins) {
ListTag(stdout);
printf(": yikes! spinning on a line over 1000 times!\n");
NS_ABORT();
}
#endif
}
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesMalloc(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
nsLineLayout* ll = new nsLineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE));
if (!ll) {
return NS_ERROR_OUT_OF_MEMORY;
}
ll->Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
nsresult rv = DoReflowInlineFrames(aState, *ll, aLine, aKeepReflowGoing,
aLineReflowStatus, aUpdateMaximumWidth, aDamageDirtyArea);
ll->EndLineReflow();
delete ll;
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesAuto(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
nsLineLayout lineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE));
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
nsresult rv = DoReflowInlineFrames(aState, lineLayout, aLine,
aKeepReflowGoing, aLineReflowStatus,
aUpdateMaximumWidth, aDamageDirtyArea);
lineLayout.EndLineReflow();
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFrames(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth,
PRBool aDamageDirtyArea)
{
// Forget all of the floaters on the line
aLine->FreeFloaters(aState.mFloaterCacheFreeList);
aState.mFloaterCombinedArea.SetRect(0, 0, 0, 0);
aState.mRightFloaterCombinedArea.SetRect(0, 0, 0, 0);
// Setup initial coordinate system for reflowing the inline frames
// into. Apply a previous block frame's bottom margin first.
aState.mY += aState.mPrevBottomMargin;
aState.GetAvailableSpace();
PRBool impactedByFloaters = aState.IsImpactedByFloater() ? PR_TRUE : PR_FALSE;
aLine->SetLineIsImpactedByFloater(impactedByFloaters);
#ifdef REALLY_NOISY_REFLOW
printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
this, impactedByFloaters);
#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,
impactedByFloaters,
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);
}
// 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
for (i = 0; i < aLine->GetChildCount(); i++) {
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 DeleteChildsNextInFlow). If so, delete them now
// in case we are finished.
nsLineBox* nextLine = aLine->mNext;
while ((nsnull != nextLine) && (0 == nextLine->GetChildCount())) {
// XXX Is this still necessary now that DeleteChildsNextInFlow
// uses DoRemoveFrame?
aLine->mNext = nextLine->mNext;
NS_ASSERTION(nsnull == nextLine->mFirstChild, "bad empty line");
aState.FreeLineBox(nextLine);
nextLine = aLine->mNext;
}
break;
}
frame->GetNextSibling(&frame);
}
// 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->GetNextSibling(&frame);
}
else {
break;
}
}
}
if (LINE_REFLOW_REDO == lineReflowStatus) {
// This happens only when we have a line that is impacted by
// floaters and the first element in the line doesn't fit with
// the floaters.
//
// What we do is to advance past the first floater we find and
// then reflow the line all over again.
NS_ASSERTION(aState.IsImpactedByFloater(),
"redo line on totally empty line");
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
"unconstrained height on totally empty line");
aState.mY += aState.mAvailSpaceRect.height;
// 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 floater.
}
else {
// If we are propogating out a break-before status then there is
// no point in placing the line.
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
rv = PlaceLine(aState, aLineLayout, aLine, aKeepReflowGoing, aUpdateMaximumWidth);
}
}
*aLineReflowStatus = lineReflowStatus;
return rv;
}
/**
* Reflow an inline frame. The reflow status is mapped from the frames
* reflow status to the lines reflow status (not to our reflow status).
* The line reflow status is simple: PR_TRUE means keep placing frames
* on the line; PR_FALSE means don't (the line is done). If the line
* has some sort of breaking affect then aLine's break-type will be set
* to something other than NS_STYLE_CLEAR_NONE.
*/
nsresult
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
nsIFrame* aFrame,
PRUint8* aLineReflowStatus)
{
*aLineReflowStatus = LINE_REFLOW_OK;
// If it's currently ok to be reflowing in first-letter style then
// we must be about to reflow a frame that has first-letter style.
PRBool reflowingFirstLetter = aLineLayout.GetFirstLetterStyleOK();
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": reflowing ");
nsFrame::ListTag(stdout, aFrame);
printf(" reflowingFirstLetter=%s\n", reflowingFirstLetter ? "on" : "off");
#endif
// Remember if we have a percentage aware child on this line
if (IsPercentageAwareChild(aFrame)) {
aLine->SetHasPercentageChild(PR_TRUE);
}
// Reflow the inline frame
nsReflowStatus frameReflowStatus;
PRBool pushedFrame;
nsresult rv = aLineLayout.ReflowFrame(aFrame, &aState.mNextRCFrame,
frameReflowStatus, nsnull, pushedFrame);
if (aFrame == aState.mNextRCFrame) {
// NULL out mNextRCFrame so if we reflow it again we don't think it's still
// an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
#ifdef REALLY_NOISY_REFLOW_CHILD
nsFrame::ListTag(stdout, aFrame);
printf(": status=%x\n", frameReflowStatus);
#endif
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_FALSE, frameReflowStatus);
#endif
// Send post-reflow notification
aState.mPrevChild = aFrame;
/* XXX
This is where we need to add logic to handle some odd behavior.
For one thing, we should usually place at least one thing next
to a left floater, even when that floater takes up all the width on a line.
see bug 22496
*/
// Process the child frames reflow status. There are 5 cases:
// complete, not-complete, break-before, break-after-complete,
// break-after-not-complete. There are two situations: we are a
// block or we are an inline. This makes a total of 10 cases
// (fortunately, there is some overlap).
aLine->SetBreakType(NS_STYLE_CLEAR_NONE);
if (NS_INLINE_IS_BREAK(frameReflowStatus)) {
// Always abort the line reflow (because a line break is the
// minimal amount of break we do).
*aLineReflowStatus = LINE_REFLOW_STOP;
// XXX what should aLine's break-type be set to in all these cases?
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
NS_ASSERTION(breakType != NS_STYLE_CLEAR_NONE, "bad break type");
NS_ASSERTION(NS_STYLE_CLEAR_PAGE != breakType, "no page breaks yet");
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// Break-before cases.
if (aFrame == aLine->mFirstChild) {
// If we break before the first frame on the line then we must
// be trying to place content where theres no room (e.g. on a
// line with wide floaters). Inform the caller to reflow the
// line after skipping past a floater.
*aLineReflowStatus = LINE_REFLOW_REDO;
}
else {
// It's not the first child on this line so go ahead and split
// the line. We will see the frame again on the next-line.
rv = SplitLine(aState, aLineLayout, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// If we're splitting the line because the frame didn't fit and it
// was pushed, then mark the line as having word wrapped. We need to
// know that if we're shrink wrapping our width
if (pushedFrame) {
aLine->SetLineWrapped(PR_TRUE);
}
}
}
else {
// Break-after cases
if (breakType == NS_STYLE_CLEAR_LINE) {
if (!aLineLayout.GetLineEndsInBR()) {
breakType = NS_STYLE_CLEAR_NONE;
}
}
aLine->SetBreakType(breakType);
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
}
// Split line, but after the frame just reflowed
nsIFrame* nextFrame;
aFrame->GetNextSibling(&nextFrame);
rv = SplitLine(aState, aLineLayout, aLine, nextFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine->mNext;
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Frame is not-complete, no special breaking status
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
// If we are reflowing the first letter frame then don't split the
// line and don't stop the line reflow...
PRBool splitLine = !reflowingFirstLetter;
if (reflowingFirstLetter) {
nsCOMPtr<nsIAtom> frameType;
aFrame->GetFrameType(getter_AddRefs(frameType));
if ((nsLayoutAtoms::inlineFrame == frameType.get()) ||
(nsLayoutAtoms::lineFrame == frameType.get())) {
splitLine = PR_TRUE;
}
}
if (splitLine) {
// Split line after the current frame
*aLineReflowStatus = LINE_REFLOW_STOP;
aFrame->GetNextSibling(&aFrame);
rv = SplitLine(aState, aLineLayout, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine->mNext;
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
return NS_OK;
}
/**
* Create a continuation, if necessary, for aFrame. Place it on the
* same line that aFrame is on. Set aMadeNewFrame to PR_TRUE if a
* new frame is created.
*/
nsresult
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame,
PRBool& aMadeNewFrame)
{
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;
aLine->SetChildCount(aLine->GetChildCount() + 1);
}
#ifdef DEBUG
VerifyLines(PR_FALSE);
#endif
return rv;
}
nsresult
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
nsIFrame* aFrame)
{
NS_ABORT_IF_FALSE(aLine->IsInline(), "illegal SplitLine on block line");
PRInt32 pushCount = aLine->GetChildCount() - aLineLayout.GetCurrentSpanCount();
NS_ABORT_IF_FALSE(pushCount >= 0, "bad push count");
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("split line: from line=%p pushCount=%d aFrame=", aLine, pushCount);
if (aFrame) {
nsFrame::ListTag(stdout, aFrame);
}
else {
printf("(null)");
}
printf("\n");
if (gReallyNoisyReflow) {
aLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
}
}
#endif
if (0 != pushCount) {
NS_ABORT_IF_FALSE(aLine->GetChildCount() > pushCount, "bad push");
NS_ABORT_IF_FALSE(nsnull != aFrame, "whoops");
// Put frames being split out into their own line
nsLineBox* newLine = aState.NewLineBox(aFrame, pushCount, PR_FALSE);
if (!newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = aLine->mNext;
aLine->mNext = newLine;
aLine->SetChildCount(aLine->GetChildCount() - pushCount);
#ifdef DEBUG
if (gReallyNoisyReflow) {
newLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
}
#endif
// Let line layout know that some frames are no longer part of its
// state.
aLineLayout.SplitLineTo(aLine->GetChildCount());
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
}
return NS_OK;
}
PRBool
nsBlockFrame::ShouldJustifyLine(nsBlockReflowState& aState, nsLineBox* aLine)
{
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
// There is another line
if (0 != next->GetChildCount()) {
// If the next line is a block line then we must not justify
// this line because it means that this line is the last in a
// group of inline lines.
return !next->IsBlock();
}
// The next line is empty, try the next one
next = next->mNext;
}
// XXX Not sure about this part
// Try our next-in-flows lines to answer the question
nsBlockFrame* nextInFlow = (nsBlockFrame*) mNextInFlow;
while (nsnull != nextInFlow) {
nsLineBox* line = nextInFlow->mLines;
while (nsnull != line) {
if (0 != line->GetChildCount()) {
return !line->IsBlock();
}
line = line->mNext;
}
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
}
// This is the last line - so don't allow justification
return PR_FALSE;
}
nsresult
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRBool aUpdateMaximumWidth)
{
nsresult rv = NS_OK;
// Trim extra white-space from the line before placing the frames
PRBool trimmed = aLineLayout.TrimTrailingWhiteSpace();
aLine->SetTrimmed(trimmed);
// 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 (HaveOutsideBullet() && (aLine == mLines) &&
(!aLineLayout.IsZeroHeight() || !aLine->mNext)) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
aLineLayout.AddBulletFrame(mBullet, metrics);
addedBullet = PR_TRUE;
}
nsSize maxElementSize;
nscoord lineAscent;
aLineLayout.VerticalAlignFrames(aLine, maxElementSize, lineAscent);
// Our ascent is the ascent of our first line
if (aLine == mLines) {
mAscent = lineAscent;
}
// See if we're shrink wrapping the width
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// When determining the line's width we also need to include any
// right floaters that impact us. This represents the shrink wrap
// width of the line
if (aState.IsImpactedByFloater() && !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",
aLine, 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 = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
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));
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);
}
nsRect combinedArea;
aLineLayout.RelativePositionFrames(combinedArea);
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->mBounds.height > 0) {
// This line has some height. Therefore the application of the
// previous-bottom-margin should stick.
aState.mPrevBottomMargin = 0;
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.
nscoord dy = -aState.mPrevBottomMargin;
newY = aState.mY + dy;
aLine->SlideBy(dy);
// keep our ascent in sync
if (mLines == aLine) {
mAscent += dy;
}
}
// See if the line fit. If it doesn't we need to push it. Our first
// line will always fit.
if ((mLines != aLine) && (newY > aState.mBottomEdge)) {
// Push this line and all of it's children and anything else that
// follows to our next-in-flow
PushLines(aState);
// Stop reflow and whack the reflow status if reflow hasn't
// already been stopped.
if (*aKeepReflowGoing) {
NS_ASSERTION(NS_FRAME_COMPLETE == aState.mReflowStatus,
"lost reflow status");
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
*aKeepReflowGoing = PR_FALSE;
}
return rv;
}
aState.mY = newY;
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": line.floaters=%s band.floaterCount=%d\n",
//aLine->mFloaters.NotEmpty() ? "yes" : "no",
aState.mHaveRightFloaters ? "(have right floaters)" : "",
aState.mBand.GetFloaterCount());
#endif
if (0 != aState.mBand.GetFloaterCount()) {
// Add in floater impacts to the lines max-element-size
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
}
}
// 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-size if requested
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
aState.UpdateMaxElementSize(maxElementSize);
// We also cache the max element width in the line. This is needed for
// incremental reflow
aLine->mMaxElementWidth = maxElementSize.width;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::PlaceLine: %p setting MES for line %p to %d\n",
this, aLine, maxElementSize.width);
#endif
}
} else {
PostPlaceLine(aState, aLine, maxElementSize);
}
// Add the already placed current-line floaters to the line
aLine->AppendFloaters(aState.mCurrentLineFloaters);
// Any below current line floaters to place?
if (aState.mBelowCurrentLineFloaters.NotEmpty()) {
// Reflow the below-current-line floaters, then add them to the
// lines floater list.
aState.PlaceBelowCurrentLineFloaters(aState.mBelowCurrentLineFloaters);
aLine->AppendFloaters(aState.mBelowCurrentLineFloaters);
}
// When a line has floaters, factor them into the combined-area
// computations.
if (aLine->HasFloaters()) {
// Combine the floater combined area (stored in aState) and the
// value computed by the line layout code.
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": lineCA=%d,%d,%d,%d floaterCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height,
aState.mFloaterCombinedArea.x, aState.mFloaterCombinedArea.y,
aState.mFloaterCombinedArea.width,
aState.mFloaterCombinedArea.height);
#endif
CombineRects(aState.mFloaterCombinedArea, lineCombinedArea);
if (aState.mHaveRightFloaters &&
(aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) || aState.GetFlag(BRS_SHRINKWRAPWIDTH))) {
// We are reflowing in an unconstrained situation or shrink wrapping and
// have some right floaters. They were placed at the infinite right edge
// which will cause the combined area to be unusable.
//
// To solve this issue, we pretend that the right floaters ended up just
// past the end of the line. Note that the right floater combined area
// we computed as we were going will have as its X coordinate the left
// most edge of all the right floaters. Therefore, to accomplish our goal
// all we do is set that X value to the lines XMost value.
#ifdef NOISY_COMBINED_AREA
printf(" ==> rightFloaterCA=%d,%d,%d,%d lineXMost=%d\n",
aState.mRightFloaterCombinedArea.x,
aState.mRightFloaterCombinedArea.y,
aState.mRightFloaterCombinedArea.width,
aState.mRightFloaterCombinedArea.height,
aLine->mBounds.XMost());
#endif
aState.mRightFloaterCombinedArea.x = aLine->mBounds.XMost();
CombineRects(aState.mRightFloaterCombinedArea, lineCombinedArea);
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
// Mark the line dirty so we come back and re-place the floater once
// the shrink wrap width is determined
aLine->MarkDirty();
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
}
}
aLine->SetCombinedArea(lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
printf(" ==> final lineCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
#endif
aState.mHaveRightFloaters = PR_FALSE;
}
// Apply break-after clearing if necessary
PRUint8 breakType = aLine->GetBreakType();
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloaters(aState.mY, breakType);
break;
}
return rv;
}
// Compute the line's max-element-size by adding into the raw value
// computed by reflowing the contents of the line (aMaxElementSize)
// the impact of floaters on this line or the preceeding lines.
void
nsBlockFrame::ComputeLineMaxElementSize(nsBlockReflowState& aState,
nsLineBox* aLine,
nsSize* aMaxElementSize)
{
nscoord maxWidth, maxHeight;
aState.mBand.GetMaxElementSize(aState.mPresContext, &maxWidth, &maxHeight);
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": maxFloaterSize=%d,%d\n", maxWidth, maxHeight);
#endif
// If the floaters are wider than the content, then use the maximum
// floater width as the maximum width.
//
// It used to be the case that we would always place some content
// next to a floater, regardless of the amount of available space
// after subtracing off the floaters sizes. This can lead to content
// overlapping floaters, so we no longer do this (and pass CSS2's
// conformance tests). This is not how navigator 4-1 used to do
// things.
if (maxWidth > aMaxElementSize->width) {
aMaxElementSize->width = maxWidth;
}
// Only update the max-element-size's height value if the floater is
// part of the current line.
if (aLine->HasFloaters()) {
// If the maximum-height of the tallest floater is larger than the
// maximum-height of the content then update the max-element-size
// height
if (maxHeight > aMaxElementSize->height) {
aMaxElementSize->height = maxHeight;
}
}
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::ComputeLineMaxElementSize: %p returning MES %d\n",
this, aMaxElementSize->width);
#endif
}
void
nsBlockFrame::PostPlaceLine(nsBlockReflowState& aState,
nsLineBox* aLine,
const nsSize& aMaxElementSize)
{
// If it's inline elements, then make sure the views are correctly
// positioned and sized
if (aLine->IsInline()) {
nsIFrame* frame = aLine->mFirstChild;
for (PRInt32 i = 0; i < aLine->GetChildCount(); i++) {
::PlaceFrameView(aState.mPresContext, frame);
frame->GetNextSibling(&frame);
}
}
// Update max-element-size
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
aState.UpdateMaxElementSize(aMaxElementSize);
// We also cache the max element width in the line. This is needed for
// incremental reflow
aLine->mMaxElementWidth = aMaxElementSize.width;
#ifdef NOISY_MAX_ELEMENT_SIZE
printf ("nsBlockFrame::PostPlaceLine: %p setting line %p MES %d\n",
this, aLine, aMaxElementSize.width);
#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",
this, 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", aLine, xmost);
}
#endif
// If we're shrink wrapping our width and the line was wrapped,
// then make sure we take up all of the available width
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH) && aLine->IsLineWrapped()) {
aState.mKidXMost = aState.BorderPadding().left + aState.mContentArea.width;
#ifdef NOISY_KIDXMOST
printf("%p PostPlaceLine A aState.mKidXMost=%d\n", this, aState.mKidXMost);
#endif
}
else if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
#ifdef NOISY_KIDXMOST
printf("%p PostPlaceLine B aState.mKidXMost=%d\n", this, aState.mKidXMost);
#endif
}
}
void
nsBlockFrame::PushLines(nsBlockReflowState& aState)
{
NS_ASSERTION(nsnull != aState.mPrevLine, "bad push");
nsLineBox* lastLine = aState.mPrevLine;
nsLineBox* nextLine = lastLine->mNext;
if (nextLine) {
lastLine->mNext = nsnull;
SetOverflowLines(aState.mPresContext, nextLine);
// Mark all the overflow lines dirty so that they get reflowed when
// they are pulled up by our next-in-flow.
while (nsnull != nextLine) {
nextLine->MarkDirty();
nextLine = nextLine->mNext;
}
}
// Break frame sibling list
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(nsnull);
#ifdef DEBUG
VerifyOverflowSituation(aState.mPresContext);
#endif
}
PRBool
nsBlockFrame::DrainOverflowLines(nsIPresContext* aPresContext)
{
#ifdef DEBUG
VerifyOverflowSituation(aPresContext);
#endif
PRBool drained = PR_FALSE;
nsLineBox* overflowLines;
// First grab the prev-in-flows overflow lines
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
if (nsnull != prevBlock) {
overflowLines = prevBlock->GetOverflowLines(aPresContext, PR_TRUE);
if (nsnull != overflowLines) {
drained = PR_TRUE;
// Make all the frames on the overflow line list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = overflowLines->mFirstChild;
while (nsnull != frame) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, prevBlock, this);
// Get the next frame
lastFrame = frame;
frame->GetNextSibling(&frame);
}
// Join the line lists
if (nsnull == mLines) {
mLines = overflowLines;
}
else {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines->mFirstChild);
// Place overflow lines at the front of our line list
nsLineBox* lastLine = nsLineBox::LastLine(overflowLines);
lastLine->mNext = mLines;
mLines = overflowLines;
}
}
}
// Now grab our own overflow lines
overflowLines = GetOverflowLines(aPresContext, PR_TRUE);
if (overflowLines) {
// This can happen when we reflow and not everything fits and then
// we are told to reflow again before a next-in-flow is created
// and reflows.
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
if (nsnull == lastLine) { // if we had no lines before the drain operation
mLines = overflowLines; // set our mLines to the overflow
}
else { // otherwise, append the overflow to the mLines list
lastLine->mNext = overflowLines;
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(overflowLines->mFirstChild);
}
drained = PR_TRUE;
}
return drained;
}
nsLineBox*
nsBlockFrame::GetOverflowLines(nsIPresContext* aPresContext,
PRBool aRemoveProperty) const
{
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
PRUint32 options = 0;
void* value;
if (aRemoveProperty) {
options |= NS_IFRAME_MGR_REMOVE_PROP;
}
frameManager->GetFrameProperty((nsIFrame*)this, nsLayoutAtoms::overflowLinesProperty,
options, &value);
return (nsLineBox*)value;
}
}
return nsnull;
}
// Destructor function for the overflowLines frame property
static void
DestroyOverflowLines(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIAtom* aPropertyName,
void* aPropertyValue)
{
if (aPropertyValue) {
nsLineBox* lines = (nsLineBox*) aPropertyValue;
nsLineBox::DeleteLineList(aPresContext, lines);
}
}
nsresult
nsBlockFrame::SetOverflowLines(nsIPresContext* aPresContext,
nsLineBox* aOverflowFrames)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = NS_ERROR_FAILURE;
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
rv = frameManager->SetFrameProperty(this, nsLayoutAtoms::overflowLinesProperty,
aOverflowFrames, DestroyOverflowLines);
// Verify that we didn't overwrite an existing overflow list
NS_ASSERTION(rv != NS_IFRAME_MGR_PROP_OVERWRITTEN, "existing overflow list");
}
}
return rv;
}
//////////////////////////////////////////////////////////////////////
// Frame list manipulation routines
nsIFrame*
nsBlockFrame::LastChild()
{
if (mLines) {
nsLineBox* line = nsLineBox::LastLine(mLines);
return line->LastChild();
}
return nsnull;
}
NS_IMETHODIMP
nsBlockFrame::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsnull == aFrameList) {
return NS_OK;
}
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName,
aFrameList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// XXX we don't *really* care about this right now because we are
// BuildFloaterList ing still
mFloaters.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 = nsLineBox::LastLine(mLines);
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(aPresContext, aFrameList, lastKid);
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
NS_IMETHODIMP
nsBlockFrame::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// XXX we don't *really* care about this right now because we are
// BuildFloaterList'ing still
mFloaters.AppendFrames(nsnull, aFrameList);
return NS_OK;
}
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(aPresContext, aFrameList, aPrevFrame);
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
nsresult
nsBlockFrame::AddFrames(nsIPresContext* aPresContext,
nsIFrame* aFrameList,
nsIFrame* aPrevSibling)
{
if (nsnull == aFrameList) {
return NS_OK;
}
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
// Attempt to find the line that contains the previous sibling
nsLineBox* prevSibLine = nsnull;
PRInt32 prevSiblingIndex = -1;
if (aPrevSibling) {
// Find the line that contains the previous sibling
prevSibLine = nsLineBox::FindLineContaining(mLines, aPrevSibling,
&prevSiblingIndex);
NS_ASSERTION(nsnull != prevSibLine, "prev sibling not in line list");
if (nsnull == prevSibLine) {
// Note: defensive code! FindLineContaining must not return
// null in this case, so if it does...
aPrevSibling = nsnull;
}
}
// Find the frame following aPrevSibling so that we can join up the
// two lists of frames.
nsIFrame* prevSiblingNextFrame = nsnull;
if (aPrevSibling) {
aPrevSibling->GetNextSibling(&prevSiblingNextFrame);
// 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;
}
line->mNext = prevSibLine->mNext;
prevSibLine->mNext = line;
prevSibLine->SetChildCount(prevSibLine->GetChildCount() - rem);
prevSibLine->MarkDirty();
}
// Now (partially) join the sibling lists together
aPrevSibling->SetNextSibling(aFrameList);
}
else if (mLines) {
prevSiblingNextFrame = mLines->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 then make a new line.
if (isBlock || !prevSibLine || prevSibLine->IsBlock()) {
// 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) {
// Append new line after prevSibLine
line->mNext = prevSibLine->mNext;
prevSibLine->mNext = line;
}
else {
// New line is going before the other lines
line->mNext = mLines;
mLines = line;
}
prevSibLine = line;
}
else {
prevSibLine->SetChildCount(prevSibLine->GetChildCount() + 1);
prevSibLine->MarkDirty();
}
aPrevSibling = newFrame;
newFrame->GetNextSibling(&newFrame);
}
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;
}
void
nsBlockFrame::FixParentAndView(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
while (aFrame) {
nsIFrame* oldParent;
aFrame->GetParent(&oldParent);
aFrame->SetParent(this);
if (this != oldParent) {
nsHTMLContainerFrame::ReparentFrameView(aPresContext, aFrame, oldParent, this);
aPresContext->ReParentStyleContext(aFrame, mStyleContext);
}
aFrame->GetNextSibling(&aFrame);
}
}
NS_IMETHODIMP
nsBlockFrame::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
nsresult rv = NS_OK;
#ifdef NOISY_REFLOW_REASON
ListTag(stdout);
printf(": remove ");
nsFrame::ListTag(stdout, aOldFrame);
printf("\n");
#endif
if (nsLayoutAtoms::absoluteList == aListName) {
return mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame);
}
else if (nsLayoutAtoms::floaterList == aListName) {
// Remove floater from the floater list first
mFloaters.RemoveFrame(aOldFrame);
// Find which line contains the floater
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->IsInline() && line->RemoveFloater(aOldFrame)) {
aOldFrame->Destroy(aPresContext);
goto found_it;
}
line = line->mNext;
}
found_it:
// Mark every line at and below the line where the floater was dirty
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
}
else if (nsnull != aListName) {
rv = NS_ERROR_INVALID_ARG;
}
else {
rv = DoRemoveFrame(aPresContext, aOldFrame);
}
if (NS_SUCCEEDED(rv)) {
// Ask the parent frame to reflow me.
ReflowDirtyChild(&aPresShell, nsnull);
}
return rv;
}
nsresult
nsBlockFrame::DoRemoveFrame(nsIPresContext* aPresContext,
nsIFrame* aDeletedFrame)
{
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
// Find the line and the previous sibling that contains
// deletedFrame; we also find the pointer to the line.
nsBlockFrame* flow = this;
nsLineBox** linep = &flow->mLines;
nsLineBox* line = flow->mLines;
nsLineBox* prevLine = nsnull;
nsIFrame* prevSibling = nsnull;
while (nsnull != line) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
if (frame == aDeletedFrame) {
goto found_frame;
}
prevSibling = frame;
frame->GetNextSibling(&frame);
}
linep = &line->mNext;
prevLine = line;
line = line->mNext;
}
found_frame:;
#ifdef NS_DEBUG
NS_ASSERTION(nsnull != line, "can't find deleted frame in lines");
if (nsnull != prevSibling) {
nsIFrame* tmp;
prevSibling->GetNextSibling(&tmp);
NS_ASSERTION(tmp == aDeletedFrame, "bad prevSibling");
}
#endif
// Remove frame and all of its continuations
while (nsnull != aDeletedFrame) {
while ((nsnull != line) && (nsnull != aDeletedFrame)) {
#ifdef NS_DEBUG
nsIFrame* parent;
aDeletedFrame->GetParent(&parent);
NS_ASSERTION(flow == parent, "messed up delete code");
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
#endif
// See if the frame being deleted is the last one on the line
PRBool isLastFrameOnLine = PR_FALSE;
if (1 == line->GetChildCount()) {
isLastFrameOnLine = PR_TRUE;
}
else if (line->LastChild() == aDeletedFrame) {
isLastFrameOnLine = PR_TRUE;
}
// Remove aDeletedFrame from the line
nsIFrame* nextFrame;
aDeletedFrame->GetNextSibling(&nextFrame);
if (line->mFirstChild == aDeletedFrame) {
line->mFirstChild = nextFrame;
}
if (prevLine && !prevLine->IsBlock()) {
// Since we just removed a frame that follows some inline
// frames, we need to reflow the previous line.
prevLine->MarkDirty();
}
// Take aDeletedFrame out of the sibling list. Note that
// prevSibling will only be nsnull when we are deleting the very
// first frame.
if (nsnull != prevSibling) {
prevSibling->SetNextSibling(nextFrame);
}
// Destroy frame; capture its next-in-flow first in case we need
// to destroy that too.
nsIFrame* nextInFlow;
aDeletedFrame->GetNextInFlow(&nextInFlow);
nsSplittableType st;
aDeletedFrame->IsSplittable(st);
if (NS_FRAME_NOT_SPLITTABLE != st) {
nsSplittableFrame::RemoveFromFlow(aDeletedFrame);
}
#ifdef NOISY_REMOVE_FRAME
printf("DoRemoveFrame: prevLine=%p line=%p frame=",
prevLine, line);
nsFrame::ListTag(stdout, aDeletedFrame);
printf(" prevSibling=%p nextInFlow=%p\n", prevSibling, nextInFlow);
#endif
aDeletedFrame->Destroy(aPresContext);
aDeletedFrame = nextInFlow;
// If line is empty, remove it now
nsLineBox* next = line->mNext;
PRInt32 lineChildCount = line->GetChildCount();
if (0 == --lineChildCount) {
*linep = next;
line->mNext = nsnull;
// 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;
line->GetCombinedArea(&lineCombinedArea);
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 10 (%d, %d, %d, %d)\n",
this, lineCombinedArea.x, lineCombinedArea.y, lineCombinedArea.width, lineCombinedArea.height);
#endif
Invalidate(aPresContext, lineCombinedArea);
line->Destroy(presShell);
line = next;
}
else {
// Make the line that just lost a frame dirty
line->SetChildCount(lineChildCount);
line->MarkDirty();
// If we just removed the last frame on the line then we need
// to advance to the next line.
if (isLastFrameOnLine) {
prevLine = line;
linep = &line->mNext;
line = next;
}
}
// See if we should keep looking in the current flow's line list.
if (nsnull != aDeletedFrame) {
if (aDeletedFrame != nextFrame) {
// The deceased frames continuation is not the next frame in
// the current flow's frame list. Therefore we know that the
// continuation is in a different parent. So break out of
// the loop so that we advance to the next parent.
#ifdef NS_DEBUG
nsIFrame* checkParent;
aDeletedFrame->GetParent(&checkParent);
NS_ASSERTION(checkParent != flow, "strange continuation");
#endif
break;
}
}
}
// Advance to next flow block if the frame has more continuations
if (nsnull != aDeletedFrame) {
flow = (nsBlockFrame*) flow->mNextInFlow;
NS_ASSERTION(nsnull != flow, "whoops, continuation without a parent");
prevLine = nsnull;
line = flow->mLines;
linep = &flow->mLines;
prevSibling = nsnull;
}
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
void
nsBlockFrame::DeleteChildsNextInFlow(nsIPresContext* aPresContext,
nsIFrame* aChild)
{
NS_PRECONDITION(IsChild(aPresContext, aChild), "bad geometric parent");
nsIFrame* nextInFlow;
aChild->GetNextInFlow(&nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
nsBlockFrame* parent;
nextInFlow->GetParent((nsIFrame**)&parent);
NS_PRECONDITION(nsnull != parent, "next-in-flow with no parent");
NS_PRECONDITION(nsnull != parent->mLines, "next-in-flow with weird parent");
// NS_PRECONDITION(nsnull == parent->mOverflowLines, "parent with overflow");
parent->DoRemoveFrame(aPresContext, nextInFlow);
}
////////////////////////////////////////////////////////////////////////
// Floater support
nsresult
nsBlockFrame::ReflowFloater(nsBlockReflowState& aState,
nsPlaceholderFrame* aPlaceholder,
nsRect& aCombinedRect,
nsMargin& aMarginResult,
nsMargin& aComputedOffsetsResult)
{
#ifdef NOISY_FLOATER
printf("Reflow Floater %p in parent %p, availSpace(%d,%d,%d,%d)\n",
aPlaceholder->GetOutOfFlowFrame(), this,
aState.mAvailSpaceRect.x, aState.mAvailSpaceRect.y,
aState.mAvailSpaceRect.width, aState.mAvailSpaceRect.height
);
#endif
// XXX update this just
aState.GetAvailableSpace();
// Reflow the floater. Since floaters are continued we given them an
// unbounded height. Floaters with an auto width are sized to zero
// according to the css2 spec.
// XXX We also need to take into account whether we should clear any
// preceeding floaters...
// XXX Why do we have to add in our border/padding?
nsRect availSpace(aState.mAvailSpaceRect.x + aState.BorderPadding().left,
aState.mAvailSpaceRect.y + aState.BorderPadding().top,
aState.mAvailSpaceRect.width, NS_UNCONSTRAINEDSIZE);
nsIFrame* floater = aPlaceholder->GetOutOfFlowFrame();
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
// Setup block reflow state to reflow the floater
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE),
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
brc.SetNextRCFrame(aState.mNextRCFrame);
// Reflow the floater
nsReflowStatus frameReflowStatus;
nsresult rv = brc.ReflowBlock(floater, availSpace, PR_TRUE, 0,
isAdjacentWithTop,
aComputedOffsetsResult, frameReflowStatus);
if (PR_TRUE==brc.BlockShouldInvalidateItself()) {
Invalidate(aState.mPresContext, mRect);
}
if (floater == aState.mNextRCFrame) {
// NULL out mNextRCFrame so if we reflow it again we don't think it's still
// an incremental reflow
aState.mNextRCFrame = nsnull;
}
if (NS_FAILED(rv)) {
return rv;
}
// Capture the margin information for the caller
const nsMargin& m = brc.GetMargin();
aMarginResult.top = brc.GetTopMargin();
aMarginResult.right = m.right;
aMarginResult.bottom =
nsBlockReflowContext::MaxMargin(brc.GetCarriedOutBottomMargin(),
m.bottom);
aMarginResult.left = m.left;
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
aCombinedRect = metrics.mOverflowArea;
// Set the rect, make sure the view is properly sized and positioned,
// and tell the frame we're done reflowing it
floater->SizeTo(aState.mPresContext, metrics.width, metrics.height);
nsIView* view;
floater->GetView(aState.mPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(aState.mPresContext, floater, view,
&metrics.mOverflowArea,
NS_FRAME_NO_MOVE_VIEW);
}
floater->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
// If we computed it, then stash away the max-element-size for later
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTSIZE)) {
nsSize mes = brc.GetMaxElementSize();
mes.SizeBy(aMarginResult.left + aMarginResult.right,
aMarginResult.top + aMarginResult.bottom);
aState.StoreMaxElementSize(floater, mes);
}
#ifdef NOISY_FLOATER
printf("end ReflowFloater %p, sized to %d,%d\n", floater, metrics.width, metrics.height);
#endif
return NS_OK;
}
void
nsBlockReflowState::InitFloater(nsLineLayout& aLineLayout,
nsPlaceholderFrame* aPlaceholder)
{
// Set the geometric parent of the floater
nsIFrame* floater = aPlaceholder->GetOutOfFlowFrame();
floater->SetParent(mBlock);
// Then add the floater to the current line and place it when
// appropriate
AddFloater(aLineLayout, aPlaceholder, PR_TRUE);
}
// This is called by the line layout's AddFloater method when a
// place-holder frame is reflowed in a line. If the floater is a
// left-most child (it's x coordinate is at the line's left margin)
// then the floater is place immediately, otherwise the floater
// placement is deferred until the line has been reflowed.
void
nsBlockReflowState::AddFloater(nsLineLayout& aLineLayout,
nsPlaceholderFrame* aPlaceholder,
PRBool aInitialReflow)
{
NS_PRECONDITION(nsnull != mCurrentLine, "null ptr");
// Allocate a nsFloaterCache for the floater
nsFloaterCache* fc = mFloaterCacheFreeList.Alloc();
fc->mPlaceholder = aPlaceholder;
fc->mIsCurrentLineFloater = aLineLayout.CanPlaceFloaterNow();
// Now place the floater immediately if possible. Otherwise stash it
// away in mPendingFloaters and place it later.
if (fc->mIsCurrentLineFloater) {
// Record this floater in the current-line list
mCurrentLineFloaters.Append(fc);
// Because we are in the middle of reflowing a placeholder frame
// within a line (and possibly nested in an inline frame or two
// that's a child of our block) we need to restore the space
// manager's translation to the space that the block resides in
// before placing the floater.
nscoord ox, oy;
mSpaceManager->GetTranslation(ox, oy);
nscoord dx = ox - mSpaceManagerX;
nscoord dy = oy - mSpaceManagerY;
mSpaceManager->Translate(-dx, -dy);
// Reflow the floater
mBlock->ReflowFloater(*this, aPlaceholder, fc->mCombinedArea,
fc->mMargins, fc->mOffsets);
// And then place it
PRBool isLeftFloater;
PlaceFloater(fc, &isLeftFloater);
// Pass on updated available space to the current inline reflow engine
GetAvailableSpace();
aLineLayout.UpdateBand(mAvailSpaceRect.x + BorderPadding().left, mY,
GetFlag(BRS_UNCONSTRAINEDWIDTH) ? NS_UNCONSTRAINEDSIZE : mAvailSpaceRect.width,
mAvailSpaceRect.height,
isLeftFloater,
aPlaceholder->GetOutOfFlowFrame());
// Restore coordinate system
mSpaceManager->Translate(dx, dy);
}
else {
// This floater will be placed after the line is done (it is a
// below-current-line floater).
mBelowCurrentLineFloaters.Append(fc);
}
}
PRBool
nsBlockReflowState::IsLeftMostChild(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
for (;;) {
nsIFrame* parent;
aFrame->GetParent(&parent);
if (parent == mBlock) {
nsIFrame* child = mCurrentLine->mFirstChild;
PRInt32 n = mCurrentLine->GetChildCount();
while ((nsnull != child) && (aFrame != child) && (--n >= 0)) {
nsSize size;
// Is the child zero-sized?
child->GetSize(size);
if (size.width > 0) {
// We found a non-zero sized child frame that precedes aFrame
return PR_FALSE;
}
child->GetNextSibling(&child);
}
break;
}
else {
// See if there are any non-zero sized child frames that precede
// aFrame in the child list
nsIFrame* child;
parent->FirstChild(aPresContext, nsnull, &child);
while ((nsnull != child) && (aFrame != child)) {
nsSize size;
// Is the child zero-sized?
child->GetSize(size);
if (size.width > 0) {
// We found a non-zero sized child frame that precedes aFrame
return PR_FALSE;
}
child->GetNextSibling(&child);
}
}
// aFrame is the left-most non-zero sized frame in its geometric parent.
// Walk up one level and check that its parent is left-most as well
aFrame = parent;
}
return PR_TRUE;
}
PRBool
nsBlockReflowState::CanPlaceFloater(const nsRect& aFloaterRect,
PRUint8 aFloats)
{
// If the current Y coordinate is not impacted by any floaters
// then by definition the floater fits.
PRBool result = PR_TRUE;
if (0 != mBand.GetFloaterCount()) {
if (mAvailSpaceRect.width < aFloaterRect.width) {
// The available width is too narrow (and its been impacted by a
// prior floater)
result = PR_FALSE;
}
else {
// At this point we know that there is enough horizontal space for
// the floater (somewhere). Lets see if there is enough vertical
// space.
if (mAvailSpaceRect.height < aFloaterRect.height) {
// The available height is too short. However, its possible that
// there is enough open space below which is not impacted by a
// floater.
//
// Compute the X coordinate for the floater based on its float
// type, assuming its placed on the current line. This is
// where the floater will be placed horizontally if it can go
// here.
nscoord xa;
if (NS_STYLE_FLOAT_LEFT == aFloats) {
xa = mAvailSpaceRect.x;
}
else {
xa = mAvailSpaceRect.XMost() - aFloaterRect.width;
// In case the floater is too big, don't go past the left edge
if (xa < mAvailSpaceRect.x) {
xa = mAvailSpaceRect.x;
}
}
nscoord xb = xa + aFloaterRect.width;
// Calculate the top and bottom y coordinates, again assuming
// that the floater is placed on the current line.
const nsMargin& borderPadding = BorderPadding();
nscoord ya = mY - borderPadding.top;
if (ya < 0) {
// CSS2 spec, 9.5.1 rule [4]: A floating box's outer top may not
// be higher than the top of its containing block.
// XXX It's not clear if it means the higher than the outer edge
// or the border edge or the inner edge?
ya = 0;
}
nscoord yb = ya + aFloaterRect.height;
nscoord saveY = mY;
for (;;) {
// Get the available space at the new Y coordinate
mY += mAvailSpaceRect.height;
GetAvailableSpace();
if (0 == mBand.GetFloaterCount()) {
// Winner. This band has no floaters on it, therefore
// there can be no overlap.
break;
}
// Check and make sure the floater won't intersect any
// floaters on this band. The floaters starting and ending
// coordinates must be entirely in the available space.
if ((xa < mAvailSpaceRect.x) || (xb > mAvailSpaceRect.XMost())) {
// The floater can't go here.
result = PR_FALSE;
break;
}
// See if there is now enough height for the floater.
if (yb < mY + mAvailSpaceRect.height) {
// Winner. The bottom Y coordinate of the floater is in
// this band.
break;
}
}
// Restore Y coordinate and available space information
// regardless of the outcome.
mY = saveY;
GetAvailableSpace();
}
}
}
return result;
}
void
nsBlockReflowState::PlaceFloater(nsFloaterCache* aFloaterCache,
PRBool* aIsLeftFloater)
{
// Save away the Y coordinate before placing the floater. We will
// restore mY at the end after placing the floater. This is
// necessary because any adjustments to mY during the floater
// placement are for the floater only, not for any non-floating
// content.
nscoord saveY = mY;
nsIFrame* floater = aFloaterCache->mPlaceholder->GetOutOfFlowFrame();
// Get the type of floater
const nsStyleDisplay* floaterDisplay;
const nsStyleSpacing* floaterSpacing;
const nsStylePosition* floaterPosition;
floater->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)floaterDisplay);
floater->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&)floaterSpacing);
floater->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&)floaterPosition);
// See if the floater should clear any preceeding floaters...
if (NS_STYLE_CLEAR_NONE != floaterDisplay->mBreakType) {
ClearFloaters(mY, floaterDisplay->mBreakType);
}
else {
// Get the band of available space
GetAvailableSpace();
}
// Get the floaters bounding box and margin information
nsRect region;
floater->GetRect(region);
// Adjust the floater size by its margin. That's the area that will
// impact the space manager.
region.width += aFloaterCache->mMargins.left + aFloaterCache->mMargins.right;
region.height += aFloaterCache->mMargins.top + aFloaterCache->mMargins.bottom;
// Find a place to place the floater. The CSS2 spec doesn't want
// floaters overlapping each other or sticking out of the containing
// block if possible (CSS2 spec section 9.5.1, see the rule list).
NS_ASSERTION((NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) ||
(NS_STYLE_FLOAT_RIGHT == floaterDisplay->mFloats),
"invalid float type");
// While there is not enough room for the floater, clear past other
// floaters until there is room (or the band is not impacted by a
// floater).
//
// Note: The CSS2 spec says that floaters should be placed as high
// as possible.
//
#ifdef FIX_BUG_37657
// Also note that in backwards compatibility mode, we skip this step
// In old browsers, floaters are horizontally stacked regardless of
// available space
nsCompatibility mode;
mPresContext->GetCompatibilityMode(&mode);
if (eCompatibility_NavQuirks != mode) {
while (!CanPlaceFloater(region, floaterDisplay->mFloats)) {
mY += mAvailSpaceRect.height;
GetAvailableSpace();
}
}
#else
while (!CanPlaceFloater(region, floaterDisplay->mFloats)) {
mY += mAvailSpaceRect.height;
GetAvailableSpace();
}
#endif
// Assign an x and y coordinate to the floater. Note that the x,y
// coordinates are computed <b>relative to the translation in the
// spacemanager</b> which means that the impacted region will be
// <b>inside</b> the border/padding area.
PRBool okToAddRectRegion = PR_TRUE;
PRBool isLeftFloater;
if (NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) {
isLeftFloater = PR_TRUE;
region.x = mAvailSpaceRect.x;
}
else {
isLeftFloater = PR_FALSE;
if (NS_UNCONSTRAINEDSIZE != mAvailSpaceRect.XMost())
region.x = mAvailSpaceRect.XMost() - region.width;
else {
okToAddRectRegion = PR_FALSE;
region.x = mAvailSpaceRect.x;
}
}
*aIsLeftFloater = isLeftFloater;
const nsMargin& borderPadding = BorderPadding();
region.y = mY - borderPadding.top;
if (region.y < 0) {
// CSS2 spec, 9.5.1 rule [4]: A floating box's outer top may not
// be higher than the top of its containing block.
// XXX It's not clear if it means the higher than the outer edge
// or the border edge or the inner edge?
region.y = 0;
}
// Place the floater in the space manager
if (okToAddRectRegion) {
#ifdef DEBUG
nsresult rv =
#endif
mSpaceManager->AddRectRegion(floater, region);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv), "bad floater placement");
}
// Save away the floaters region in the spacemanager, after making
// it relative to the containing block's frame instead of relative
// to the spacemanager translation (which is inset by the
// border+padding).
aFloaterCache->mRegion.x = region.x + borderPadding.left;
aFloaterCache->mRegion.y = region.y + borderPadding.top;
aFloaterCache->mRegion.width = region.width;
aFloaterCache->mRegion.height = region.height;
#ifdef NOISY_SPACEMANAGER
nscoord tx, ty;
mSpaceManager->GetTranslation(tx, ty);
nsFrame::ListTag(stdout, mBlock);
printf(": PlaceFloater: AddRectRegion: txy=%d,%d (%d,%d) {%d,%d,%d,%d}\n",
tx, ty, mSpaceManagerX, mSpaceManagerY,
aFloaterCache->mRegion.x, aFloaterCache->mRegion.y,
aFloaterCache->mRegion.width, aFloaterCache->mRegion.height);
#endif
// Set the origin of the floater frame, in frame coordinates. These
// coordinates are <b>not</b> relative to the spacemanager
// translation, therefore we have to factor in our border/padding.
nscoord x = borderPadding.left + aFloaterCache->mMargins.left + region.x;
nscoord y = borderPadding.top + aFloaterCache->mMargins.top + region.y;
// If floater is relatively positioned, factor that in as well
if (NS_STYLE_POSITION_RELATIVE == floaterPosition->mPosition) {
x += aFloaterCache->mOffsets.left;
y += aFloaterCache->mOffsets.top;
}
// Position the floater and make sure and views are properly positioned
nsIView* view;
floater->MoveTo(mPresContext, x, y);
floater->GetView(mPresContext, &view);
if (view) {
nsContainerFrame::PositionFrameView(mPresContext, floater, view);
} else {
nsContainerFrame::PositionChildViews(mPresContext, floater);
}
// Update the floater combined area state
nsRect combinedArea = aFloaterCache->mCombinedArea;
combinedArea.x += x;
combinedArea.y += y;
if (!isLeftFloater &&
(GetFlag(BRS_UNCONSTRAINEDWIDTH) || GetFlag(BRS_SHRINKWRAPWIDTH))) {
// When we are placing a right floater in an unconstrained situation or
// when shrink wrapping, we don't apply it to the floater combined area
// immediately. Otherwise we end up with an infinitely wide combined
// area. Instead, we save it away in mRightFloaterCombinedArea so that
// later on when we know the width of a line we can compute a better value.
if (!mHaveRightFloaters) {
mRightFloaterCombinedArea = combinedArea;
mHaveRightFloaters = PR_TRUE;
}
else {
CombineRects(combinedArea, mRightFloaterCombinedArea);
}
}
else {
CombineRects(combinedArea, mFloaterCombinedArea);
}
// Now restore mY
mY = saveY;
#ifdef DEBUG
if (gNoisyReflow) {
nsRect r;
floater->GetRect(r);
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("placed floater: ");
((nsFrame*)floater)->ListTag(stdout);
printf(" %d,%d,%d,%d\n", r.x, r.y, r.width, r.height);
}
#endif
}
/**
* Place below-current-line floaters.
*/
void
nsBlockReflowState::PlaceBelowCurrentLineFloaters(nsFloaterCacheList& aList)
{
nsFloaterCache* fc = aList.Head();
while (fc) {
if (!fc->mIsCurrentLineFloater) {
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("placing bcl floater: ");
nsFrame::ListTag(stdout, fc->mPlaceholder->GetOutOfFlowFrame());
printf("\n");
}
#endif
mBlock->ReflowFloater(*this, fc->mPlaceholder, fc->mCombinedArea,
fc->mMargins, fc->mOffsets);
// Place the floater
PRBool isLeftFloater;
PlaceFloater(fc, &isLeftFloater);
}
fc = fc->Next();
}
}
void
nsBlockReflowState::ClearFloaters(nscoord aY, PRUint8 aBreakType)
{
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("clear floaters: in: mY=%d aY=%d(%d)\n",
mY, aY, aY - BorderPadding().top);
}
#endif
#ifdef NOISY_FLOATER_CLEARING
printf("nsBlockReflowState::ClearFloaters: aY=%d breakType=%dn",
aY, aBreakType);
mSpaceManager->List(stdout);
#endif
const nsMargin& bp = BorderPadding();
nscoord newY = mBand.ClearFloaters(aY - bp.top, aBreakType);
mY = newY + bp.top;
GetAvailableSpace();
#ifdef DEBUG
if (gNoisyReflow) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("clear floaters: out: mY=%d(%d)\n", mY, mY - bp.top);
}
#endif
}
//////////////////////////////////////////////////////////////////////
// Painting, event handling
PRIntn
nsBlockFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
#ifdef DEBUG
static void ComputeCombinedArea(nsLineBox* aLine,
nscoord aWidth, nscoord aHeight,
nsRect& aResult)
{
nscoord xa = 0, ya = 0, xb = aWidth, yb = aHeight;
while (nsnull != aLine) {
// Compute min and max x/y values for the reflowed frame's
// combined areas
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
nscoord x = lineCombinedArea.x;
nscoord y = lineCombinedArea.y;
nscoord xmost = x + lineCombinedArea.width;
nscoord ymost = y + lineCombinedArea.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
aLine = aLine->mNext;
}
aResult.x = xa;
aResult.y = ya;
aResult.width = xb - xa;
aResult.height = yb - ya;
}
#endif
NS_IMETHODIMP
nsBlockFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
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
const nsStyleDisplay* disp = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
// Only paint the border and background if we're visible
if (disp->IsVisible() && (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) &&
(0 != mRect.width) && (0 != mRect.height)) {
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color = (const nsStyleColor*)
mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing = (const nsStyleSpacing*)
mStyleContext->GetStyleData(eStyleStruct_Spacing);
// Paint background, border and outline
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *spacing, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext,
skipSides);
nsCSSRendering::PaintOutline(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, 0);
}
// 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_HIDDEN == disp->mOverflow) {
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_FLOATERS == aWhichLayer) {
PaintFloaters(aPresContext, aRenderingContext, aDirtyRect);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
PRBool clipState;
aRenderingContext.PopState(clipState);
}
#if 0
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
// Render the bands in the spacemanager
nsISpaceManager* 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, 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(r);
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;
}
void
nsBlockFrame::PaintFloaters(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
if (!line->HasFloaters()) {
continue;
}
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_BACKGROUND);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_FLOATERS);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
floater, NS_FRAME_PAINT_LAYER_FOREGROUND);
fc = fc->Next();
}
}
}
void
nsBlockFrame::PaintChildren(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
#ifdef DEBUG
PRInt32 depth = 0;
if (gNoisyDamageRepair) {
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
depth = GetDepth();
}
}
PRTime start;
PRInt32 drawnLines;
if (gLamePaintMetrics) {
start = PR_Now();
drawnLines = 0;
}
#endif
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
// If the line's combined area (which includes child frames that
// stick outside of the line's bounding box or our bounding box)
// intersects the dirty rect then paint the line.
if (line->CombinedAreaIntersects(aDirtyRect)) {
#ifdef DEBUG
if (gNoisyDamageRepair &&
(NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer)) {
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nsFrame::IndentBy(stdout, depth+1);
printf("draw line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
line, line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
}
if (gLamePaintMetrics) {
drawnLines++;
}
#endif
nsIFrame* kid = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
aWhichLayer);
kid->GetNextSibling(&kid);
}
}
#ifdef DEBUG
else {
if (gNoisyDamageRepair &&
(NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer)) {
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nsFrame::IndentBy(stdout, depth+1);
printf("skip line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
line, line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
}
}
#endif
}
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 = nsLineBox::ListLength(mLines);
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
}
NS_IMETHODIMP
nsBlockFrame::HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
nsresult result;
nsCOMPtr<nsIPresShell> shell;
if (aEvent->message == NS_MOUSE_MOVE) {
aPresContext->GetShell(getter_AddRefs(shell));
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
shell->GetFrameSelection(getter_AddRefs(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 ) {
nsIFrame *resultFrame = nsnull;//this will be passed the handle event when we
//can tell who to pass it to
nsCOMPtr<nsILineIterator> it;
nsIFrame *mainframe = this;
nsCOMPtr<nsIFocusTracker> tracker;
aPresContext->GetShell(getter_AddRefs(shell));
if (!shell)
return NS_OK;
result = shell->QueryInterface(NS_GET_IID(nsIFocusTracker),getter_AddRefs(tracker));
result = mainframe->QueryInterface(NS_GET_IID(nsILineIterator),getter_AddRefs(it));
nsIView* parentWithView;
nsPoint origin;
while(NS_SUCCEEDED(result))
{ //we are starting aloop to allow us to "drill down to the one we want"
mainframe->GetOffsetFromView(aPresContext, origin, &parentWithView);
if (NS_FAILED(result))
return NS_OK;//do not handle
PRInt32 countLines;
result = it->GetNumLines(&countLines);
if (NS_FAILED(result))
return NS_OK;//do not handle
PRInt32 i;
PRInt32 lineFrameCount;
nsIFrame *firstFrame;
nsRect rect;
PRInt32 closestLine = 0;
PRInt32 closestDistance = 999999; //some HUGE number that will always fail first comparison
//incase we hit another block frame.
for (i = 0; i< countLines;i++)
{
PRUint32 flags;
result = it->GetLine(i, &firstFrame, &lineFrameCount,rect,&flags);
if (NS_FAILED(result))
continue;//do not handle
rect+=origin;
rect.width = aEvent->point.x - rect.x+1;//EXTEND RECT TO REACH POINT
if (rect.Contains(aEvent->point.x, aEvent->point.y))
{
closestLine = i;
break;
}
else
{
PRInt32 distance = PR_MIN(abs(rect.y - aEvent->point.y),abs((rect.y + rect.height) - aEvent->point.y));
if (distance < closestDistance)
{
closestDistance = distance;
closestLine = i;
}
else if (distance > closestDistance)
break;//done
}
}
//we will now ask where to go. if we cant find what we want"aka another block frame"
//we drill down again
nsPeekOffsetStruct pos;
pos.mTracker = tracker;
pos.mDirection = eDirNext;
pos.mDesiredX = aEvent->point.x;
result = nsFrame::GetNextPrevLineFromeBlockFrame(aPresContext,
&pos,
mainframe,
closestLine-1,
0
);
if (NS_SUCCEEDED(result) && pos.mResultFrame){
result = pos.mResultFrame->QueryInterface(NS_GET_IID(nsILineIterator),getter_AddRefs(it));//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)
{
result = resultFrame->HandleEvent(aPresContext, aEvent, aEventStatus);
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
CaptureMouse(aPresContext, PR_TRUE);
return result;
}
else
{
/*we have to add this because any frame that overrides nsFrame::HandleEvent for mouse down MUST capture the mouse events!!
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
CaptureMouse(aPresContext, PR_TRUE);*/
return NS_OK; //just stop it
}
}
return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
NS_IMETHODIMP
nsBlockFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
nsresult rv;
switch (aWhichLayer) {
case NS_FRAME_PAINT_LAYER_FOREGROUND:
rv = GetFrameForPointUsing(aPresContext, aPoint, nsnull, NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
if (nsnull != mBullet) {
rv = GetFrameForPointUsing(aPresContext, aPoint, nsLayoutAtoms::bulletList, NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE, aFrame);
}
return rv;
break;
case NS_FRAME_PAINT_LAYER_FLOATERS:
// we painted our floaters before our children, and thus
// we should check floaters within children first
rv = GetFrameForPointUsing(aPresContext, aPoint, nsnull, NS_FRAME_PAINT_LAYER_FLOATERS, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
if (mFloaters.NotEmpty()) {
rv = GetFrameForPointUsing(aPresContext, aPoint, nsLayoutAtoms::floaterList, NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
rv = GetFrameForPointUsing(aPresContext, aPoint, nsLayoutAtoms::floaterList, NS_FRAME_PAINT_LAYER_FLOATERS, PR_FALSE, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
return GetFrameForPointUsing(aPresContext, aPoint, nsLayoutAtoms::floaterList, NS_FRAME_PAINT_LAYER_BACKGROUND, 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(aPresContext, 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;
}
NS_IMETHODIMP
nsBlockFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild)
{
if (aChild) {
// See if the child is absolutely positioned
nsFrameState childState;
aChild->GetFrameState(&childState);
if (childState & NS_FRAME_OUT_OF_FLOW) {
const nsStylePosition* position;
aChild->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (position->IsAbsolutelyPositioned()) {
// Generate a reflow command to reflow our dirty absolutely
// positioned child frames.
// XXX Note that we don't currently try and coalesce the reflow commands,
// although we should. We can't use the NS_FRAME_HAS_DIRTY_CHILDREN
// flag, because that's used to indicate whether in-flow children are
// dirty...
nsIReflowCommand* reflowCmd;
nsresult rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
reflowCmd->SetChildListName(nsLayoutAtoms::absoluteList);
aPresShell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
return rv;
}
}
}
// Mark the line containing the child frame dirty.
if (aChild) {
PRBool isFloater;
nsLineBox* prevLine;
nsLineBox* line = FindLineFor(aChild, &prevLine, &isFloater);
if (!isFloater) {
if (line) MarkLineDirty(line, prevLine);
}
else {
line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
}
}
// Either generate a reflow command to reflow the dirty child or
// coalesce this reflow request with an existing reflow command
if (!(mState & NS_FRAME_HAS_DIRTY_CHILDREN)) {
// If this is the first dirty child,
// post a dirty children reflow command targeted at yourself
mState |= NS_FRAME_HAS_DIRTY_CHILDREN;
nsFrame::CreateAndPostReflowCommand(aPresShell, this,
nsIReflowCommand::ReflowDirty, nsnull, nsnull, nsnull);
}
else {
if (!(mState & NS_FRAME_IS_DIRTY)) {
// Mark yourself as dirty
mState |= NS_FRAME_IS_DIRTY;
// Cancel the dirty children reflow command you posted earlier
nsIReflowCommand::ReflowType type = nsIReflowCommand::ReflowDirty;
aPresShell->CancelReflowCommand(this, &type);
// Pass up the reflow request to the parent frame.
mParent->ReflowDirtyChild(aPresShell, this);
}
}
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Debugging
#ifdef NS_DEBUG
static PRBool
InLineList(nsLineBox* aLines, nsIFrame* aFrame)
{
while (nsnull != aLines) {
nsIFrame* frame = aLines->mFirstChild;
PRInt32 n = aLines->GetChildCount();
while (--n >= 0) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(&frame);
}
aLines = aLines->mNext;
}
return PR_FALSE;
}
static PRBool
InSiblingList(nsLineBox* aLine, nsIFrame* aFrame)
{
if (nsnull != aLine) {
nsIFrame* frame = aLine->mFirstChild;
while (nsnull != frame) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(&frame);
}
}
return PR_FALSE;
}
PRBool
nsBlockFrame::IsChild(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
nsIFrame* parent;
aFrame->GetParent(&parent);
if (parent != (nsIFrame*)this) {
return PR_FALSE;
}
if (InLineList(mLines, aFrame) && InSiblingList(mLines, aFrame)) {
return PR_TRUE;
}
nsLineBox* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
if (InLineList(overflowLines, aFrame) && InSiblingList(overflowLines, aFrame)) {
return PR_TRUE;
}
return PR_FALSE;
}
NS_IMETHODIMP
nsBlockFrame::VerifyTree() const
{
// XXX rewrite this
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aHandler || !aResult) {
return NS_ERROR_NULL_POINTER;
}
PRUint32 sum = sizeof(*this);
// Add in size of each line object
nsLineBox* line = mLines;
while (line) {
PRUint32 lineBoxSize;
nsIAtom* atom = line->SizeOf(aHandler, &lineBoxSize);
aHandler->AddSize(atom, lineBoxSize);
line = line->mNext;
}
*aResult = sum;
return NS_OK;
}
#endif
//----------------------------------------------------------------------
NS_IMETHODIMP
nsBlockFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
if (aPrevInFlow) {
// Copy over the block/area frame type flags
nsBlockFrame* blockFrame = (nsBlockFrame*)aPrevInFlow;
SetFlags(blockFrame->mState & NS_BLOCK_FLAGS_MASK);
}
nsresult rv = nsBlockFrameSuper::Init(aPresContext, aContent, aParent,
aContext, aPrevInFlow);
return rv;
}
nsIStyleContext*
nsBlockFrame::GetFirstLetterStyle(nsIPresContext* aPresContext)
{
nsIStyleContext* fls;
aPresContext->ProbePseudoStyleContextFor(mContent,
nsHTMLAtoms::firstLetterPseudo,
mStyleContext, PR_FALSE, &fls);
return fls;
}
NS_IMETHODIMP
nsBlockFrame::SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = NS_OK;
if (nsLayoutAtoms::absoluteList == aListName) {
mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
}
else if (nsLayoutAtoms::floaterList == aListName) {
mFloaters.SetFrames(aChildList);
}
else {
// Lookup up the two pseudo style contexts
if (nsnull == mPrevInFlow) {
nsIStyleContext* firstLetterStyle = GetFirstLetterStyle(aPresContext);
if (nsnull != firstLetterStyle) {
mState |= NS_BLOCK_HAS_FIRST_LETTER_STYLE;
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": first-letter style found\n");
#endif
NS_RELEASE(firstLetterStyle);
}
}
rv = AddFrames(aPresContext, aChildList, nsnull);
if (NS_FAILED(rv)) {
return rv;
}
// Create list bullet if this is a list-item. Note that this is done
// here so that RenumberLists will work (it needs the bullets to
// store the bullet numbers).
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
if ((nsnull == mPrevInFlow) &&
(NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) &&
(nsnull == mBullet)) {
// Resolve style for the bullet frame
nsIStyleContext* kidSC;
aPresContext->ResolvePseudoStyleContextFor(mContent,
nsHTMLAtoms::mozListBulletPseudo,
mStyleContext, PR_FALSE, &kidSC);
// Create bullet frame
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
mBullet = new (shell.get()) nsBulletFrame;
if (nsnull == mBullet) {
NS_RELEASE(kidSC);
return NS_ERROR_OUT_OF_MEMORY;
}
mBullet->Init(aPresContext, mContent, this, kidSC, nsnull);
NS_RELEASE(kidSC);
// If the list bullet frame should be positioned inside then add
// it to the flow now.
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE ==
styleList->mListStylePosition) {
AddFrames(aPresContext, mBullet, nsnull);
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
else {
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
}
}
return NS_OK;
}
PRBool
nsBlockFrame::FrameStartsCounterScope(nsIFrame* aFrame)
{
const nsStyleContent* styleContent;
aFrame->GetStyleData(eStyleStruct_Content,
(const nsStyleStruct*&) styleContent);
if (0 != styleContent->CounterResetCount()) {
// Winner
return PR_TRUE;
}
return PR_FALSE;
}
void
nsBlockFrame::RenumberLists(nsIPresContext* aPresContext)
{
if (!FrameStartsCounterScope(this)) {
// If this frame doesn't start a counter scope then we don't need
// to renumber child list items.
return;
}
// Setup initial list ordinal value
// XXX Map html's start property to counter-reset style
PRInt32 ordinal = 1;
nsIHTMLContent* hc;
if (mContent && (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc))) {
nsHTMLValue value;
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetHTMLAttribute(nsHTMLAtoms::start, value)) {
if (eHTMLUnit_Integer == value.GetUnit()) {
ordinal = value.GetIntValue();
if (ordinal <= 0) {
ordinal = 1;
}
}
}
NS_RELEASE(hc);
}
// Get to first-in-flow
nsBlockFrame* block = (nsBlockFrame*) GetFirstInFlow();
RenumberListsInBlock(aPresContext, block, &ordinal, 0);
}
PRBool
nsBlockFrame::RenumberListsInBlock(nsIPresContext* aPresContext,
nsBlockFrame* aBlockFrame,
PRInt32* aOrdinal,
PRInt32 aDepth)
{
PRBool renumberedABullet = PR_FALSE;
while (nsnull != aBlockFrame) {
// Examine each line in the block
nsLineBox* line = aBlockFrame->mLines;
while (line) {
nsIFrame* kid = line->mFirstChild;
PRInt32 n = line->GetChildCount();
while (--n >= 0) {
PRBool kidRenumberedABullet = RenumberListsFor(aPresContext, kid, aOrdinal, aDepth);
if (kidRenumberedABullet) {
line->MarkDirty();
renumberedABullet = PR_TRUE;
}
kid->GetNextSibling(&kid);
}
line = line->mNext;
}
// Advance to the next continuation
aBlockFrame->GetNextInFlow((nsIFrame**) &aBlockFrame);
}
return renumberedABullet;
}
// XXX temporary code: after ib work is done in frame construction
// code this can be removed.
PRBool
nsBlockFrame::RenumberListsIn(nsIPresContext* aPresContext,
nsIFrame* aContainerFrame,
PRInt32* aOrdinal,
PRInt32 aDepth)
{
PRBool renumberedABullet = PR_FALSE;
// For each flow-block...
while (nsnull != aContainerFrame) {
// For each frame in the flow-block...
nsIFrame* kid;
aContainerFrame->FirstChild(aPresContext, nsnull, &kid);
while (nsnull != kid) {
PRBool kidRenumberedABullet = RenumberListsFor(aPresContext, kid, aOrdinal, aDepth);
if (kidRenumberedABullet) {
renumberedABullet = PR_TRUE;
}
kid->GetNextSibling(&kid);
}
aContainerFrame->GetNextInFlow(&aContainerFrame);
}
return renumberedABullet;
}
PRBool
nsBlockFrame::RenumberListsFor(nsIPresContext* aPresContext,
nsIFrame* aKid,
PRInt32* aOrdinal,
PRInt32 aDepth)
{
// add in a sanity check for absurdly deep frame trees. See bug 42138
if (MAX_DEPTH_FOR_LIST_RENUMBERING < aDepth)
return PR_FALSE;
PRBool kidRenumberedABullet = PR_FALSE;
// If the frame is a list-item and the frame implements our
// block frame API then get it's bullet and set the list item
// ordinal.
const nsStyleDisplay* display;
aKid->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
// Make certain that the frame isa block-frame in case
// something foreign has crept in.
nsBlockFrame* listItem;
nsresult rv = aKid->QueryInterface(kBlockFrameCID, (void**)&listItem);
if (NS_SUCCEEDED(rv)) {
if (nsnull != listItem->mBullet) {
PRBool changed;
*aOrdinal = listItem->mBullet->SetListItemOrdinal(*aOrdinal,
&changed);
if (changed) {
kidRenumberedABullet = PR_TRUE;
}
}
// XXX temporary? if the list-item has child list-items they
// should be numbered too; especially since the list-item is
// itself (ASSUMED!) not to be a counter-reseter.
PRBool meToo = RenumberListsInBlock(aPresContext, listItem, aOrdinal, aDepth + 1);
if (meToo) {
kidRenumberedABullet = PR_TRUE;
}
}
}
else if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
if (FrameStartsCounterScope(aKid)) {
// Don't bother recursing into a block frame that is a new
// counter scope. Any list-items in there will be handled by
// it.
}
else {
// If the display=block element ISA block-frame then go
// ahead and recurse into it as it might have child
// list-items.
nsBlockFrame* kidBlock;
nsresult rv = aKid->QueryInterface(kBlockFrameCID, (void**) &kidBlock);
if (NS_SUCCEEDED(rv)) {
kidRenumberedABullet = RenumberListsInBlock(aPresContext, kidBlock, aOrdinal, aDepth + 1);
}
}
} else if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
// XXX temporary code: after ib work is done in frame construction
// code this can be removed.
// If the display=inline element ISA nsInlineFrame then go
// ahead and recurse into it as it might have child
// list-items.
nsInlineFrame* kidInline;
nsresult rv = aKid->QueryInterface(nsInlineFrame::kInlineFrameCID,
(void**) &kidInline);
if (NS_SUCCEEDED(rv)) {
kidRenumberedABullet = RenumberListsIn(aPresContext, aKid, aOrdinal, aDepth + 1);
}
}
return kidRenumberedABullet;
}
void
nsBlockFrame::ReflowBullet(nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
// Reflow the bullet now
nsSize availSize;
availSize.width = NS_UNCONSTRAINEDSIZE;
availSize.height = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
mBullet, availSize);
nsReflowStatus status;
mBullet->WillReflow(aState.mPresContext);
mBullet->Reflow(aState.mPresContext, aMetrics, reflowState, status);
// Place the bullet now; use its right margin to distance it
// from the rest of the frames in the line
nscoord x = - reflowState.mComputedMargin.right - aMetrics.width;
// Approximate the bullets position; vertical alignment will provide
// the final vertical location.
const nsMargin& bp = aState.BorderPadding();
nscoord y = bp.top;
mBullet->SetRect(aState.mPresContext, nsRect(x, y, aMetrics.width, aMetrics.height));
mBullet->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
}
//XXX get rid of this -- its slow
void
nsBlockFrame::BuildFloaterList()
{
nsIFrame* head = nsnull;
nsIFrame* current = nsnull;
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
if (nsnull == head) {
current = head = floater;
}
else {
current->SetNextSibling(floater);
current = floater;
}
fc = fc->Next();
}
}
line = line->mNext;
}
// Terminate end of floater list just in case a floater was removed
if (nsnull != current) {
current->SetNextSibling(nsnull);
}
mFloaters.SetFrames(head);
}
// XXX keep the text-run data in the first-in-flow of the block
#ifdef DEBUG
void
nsBlockFrame::VerifyLines(PRBool aFinalCheckOK)
{
if (!gVerifyLines) {
return;
}
nsLineBox* line = mLines;
if (!line) {
return;
}
// Add up the counts on each line. Also validate that IsFirstLine is
// set properly.
PRInt32 count = 0;
PRBool seenBlock = PR_FALSE;
while (nsnull != line) {
if (aFinalCheckOK) {
NS_ABORT_IF_FALSE(line->GetChildCount(), "empty line");
if (line->IsBlock()) {
seenBlock = PR_TRUE;
}
if (line->IsBlock()) {
NS_ASSERTION(1 == line->GetChildCount(), "bad first line");
}
}
count += line->GetChildCount();
line = line->mNext;
}
// Then count the frames
PRInt32 frameCount = 0;
nsIFrame* frame = mLines->mFirstChild;
while (nsnull != frame) {
frameCount++;
frame->GetNextSibling(&frame);
}
NS_ASSERTION(count == frameCount, "bad line list");
// Next: test that each line has right number of frames on it
line = mLines;
nsLineBox* prevLine = nsnull;
while (nsnull != line) {
count = line->GetChildCount();
frame = line->mFirstChild;
while (--count >= 0) {
frame->GetNextSibling(&frame);
}
prevLine = line;
line = line->mNext;
if ((nsnull != line) && (0 != line->GetChildCount())) {
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
}
}
}
// Its possible that a frame can have some frames on an overflow
// list. But its never possible for multiple frames to have overflow
// lists. Check that this fact is actually true.
void
nsBlockFrame::VerifyOverflowSituation(nsIPresContext* aPresContext)
{
nsBlockFrame* flow = (nsBlockFrame*) GetFirstInFlow();
while (nsnull != flow) {
nsLineBox* overflowLines = GetOverflowLines(aPresContext, PR_FALSE);
if (nsnull != overflowLines) {
NS_ASSERTION(nsnull != overflowLines->mFirstChild,
"bad overflow list");
}
flow = (nsBlockFrame*) flow->mNextInFlow;
}
}
PRInt32
nsBlockFrame::GetDepth() const
{
PRInt32 depth = 0;
nsIFrame* parent = mParent;
while (nsnull != parent) {
parent->GetParent(&parent);
depth++;
}
return depth;
}
#endif
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