pjs/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 1.0 (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.
*/
#include "nsHTMLContainerFrame.h"
#include "nsFrameReflowState.h"
#include "nsLineLayout.h"
#include "nsInlineReflow.h"
#include "nsCSSLayout.h"
#include "nsAbsoluteFrame.h"
#include "nsPlaceholderFrame.h"
#include "nsStyleConsts.h"
#include "nsHTMLIIDs.h"
#include "nsCSSRendering.h"
#include "nsIAnchoredItems.h"
#include "nsIFloaterContainer.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 "js/jsapi.h"
//#include "nsDOMEvent.h"
#define DOM_EVENT_INIT 0x0001
#include "prprf.h"
// XXX These are unfortunate dependencies
#include "nsIHTMLContent.h"
#include "nsHTMLImage.h"
/* 52b33130-0b99-11d2-932e-00805f8add32 */
#define NS_BLOCK_FRAME_CID \
{ 0x52b33130, 0x0b99, 0x11d2, {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
// 09-15-98: make sure that the outer container of the block (e.g. the
// body sets up the outer top margin feed in properly so that the top
// margin collapses properly with the body margin. Note that for the
// block that is reflowing a body's children the body will have a
// padding value that wants to be collapsed with the blocks
// first-child's top-margin (e.g. BODY P foo needs to collapse P's margin
// with the BODY's padding
// 09-17-98: I don't like keeping mInnerBottomMargin
// 09-18-98: I think I can get rid of the distinction in this code
// between blocks and inlines. The only real issue remaining is that
// real blocks (that implement nsIRunaround) require a slightly
// different coordinate system to begin reflow at (x/y/widht/height
// values to aInlineReflow.Init) than do regular frames that do not
// implement nsIRunaround. Factoring break-before/break-after should
// be easy and handle the other 90% difference.
// 09-18-98: floating block elements don't size quite right because we
// wrap them in a body frame and the body frame doesn't honor the css
// width/height properties (among others!). The body code needs
// updating.
//XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
//XXX below this line is dubious (the entire file? :-)
// XXX MULTICOL support; note that multicol will end up using the
// equivalent of pagination! Therefore we should probably make sure
// the pagination code isn't completely stupid.
// XXX page-breaks
// XXX out of memory checks are missing
// XXX Tuneup: if mNoWrap is true and we are given a ResizeReflow we
// can just return because there's nothing to do!; this is true in
// nsInlineFrame too!
// Except that noWrap is ignored if the containers width is too small
// (like a table cell with a fixed width.)
//----------------------------------------------------------------------
// XXX It's really important that blocks strip out extra whitespace;
// otherwise we will see ALOT of this, which will waste memory big time:
//
// <fd(inline - empty height because of compressed \n)>
// <fd(block)>
// <fd(inline - empty height because of compressed \n)>
// <fd(block)>
// ...
//----------------------------------------------------------------------
// XXX I don't want mFirstChild, mChildCount, mOverflowList,
//XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
class BulletFrame;
struct LineData;
class nsBlockFrame;
/* 52b33130-0b99-11d2-932e-00805f8add32 */
#define NS_BLOCK_FRAME_CID \
{ 0x52b33130, 0x0b99, 0x11d2, {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
// XXX hide this as soon as list bullet code is cleaned up
struct nsBlockReflowState : public nsFrameReflowState {
nsBlockReflowState(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
const nsHTMLReflowMetrics& aMetrics);
~nsBlockReflowState();
/**
* Update the mCurrentBand data based on the current mY position.
*/
void GetAvailableSpace();
void AddFloater(nsPlaceholderFrame* aPlaceholderFrame);
void PlaceFloater(nsPlaceholderFrame* aFloater, PRBool& aIsLeftFloater);
void PlaceFloaters(nsVoidArray* aFloaters);
void ClearFloaters(PRUint8 aBreakType);
PRBool IsLeftMostChild(nsIFrame* aFrame);
nsLineLayout mLineLayout;
nsInlineReflow* mInlineReflow;
nsISpaceManager* mSpaceManager;
nscoord mSpaceManagerX, mSpaceManagerY;
nsBlockFrame* mBlock;
nsBlockFrame* mNextInFlow;
PRBool mInlineReflowPrepared;
PRUint8 mTextAlign;
PRUint8 mPrevMarginFlags;
nsSize mStyleSize;
PRIntn mStyleSizeFlags;
nscoord mBottomEdge; // maximum Y
PRBool mUnconstrainedWidth;
PRBool mUnconstrainedHeight;
nscoord mY;
nscoord mKidXMost;
nsIFrame* mPrevChild;
LineData* mFreeList;
nsVoidArray mPendingFloaters;
LineData* mCurrentLine;
LineData* mPrevLine;
// The next list ordinal for counting list bullets
PRInt32 mNextListOrdinal;
// XXX what happens if we need more than 12 trapezoids?
struct BlockBandData : public nsBandData {
// Trapezoids used during band processing
nsBandTrapezoid data[12];
// Bounding rect of available space between any left and right floaters
nsRect availSpace;
BlockBandData() {
size = 12;
trapezoids = data;
}
/**
* Computes the bounding rect of the available space, i.e. space
* between any left and right floaters Uses the current trapezoid
* data, see nsISpaceManager::GetBandData(). Also updates member
* data "availSpace".
*/
void ComputeAvailSpaceRect();
};
BlockBandData mCurrentBand;
};
// XXX This is vile. Make it go away
void
nsLineLayout::AddFloater(nsPlaceholderFrame* aFrame)
{
mBlockReflowState->AddFloater(aFrame);
}
//----------------------------------------------------------------------
#define nsBlockFrameSuper nsHTMLContainerFrame
class nsBlockFrame : public nsBlockFrameSuper,
public nsIFloaterContainer
{
public:
nsBlockFrame(nsIContent* aContent, nsIFrame* aParent);
~nsBlockFrame();
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIFrame
NS_IMETHOD Init(nsIPresContext& aPresContext, nsIFrame* aChildList);
NS_IMETHOD FirstChild(nsIFrame*& aFirstChild) const;
NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const;
NS_IMETHOD CreateContinuingFrame(nsIPresContext& aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame);
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
aBase = PR_TRUE;
return NS_OK;
}
NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
NS_IMETHOD ListTag(FILE* out) const;
NS_IMETHOD VerifyTree() const;
// nsIHTMLReflow
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// nsIFloaterContainer
virtual PRBool AddFloater(nsIPresContext* aPresContext,
const nsHTMLReflowState& aPlaceholderReflowState,
nsIFrame* aFloater,
nsPlaceholderFrame* aPlaceholder);
#ifdef DO_SELECTION
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
NS_IMETHOD HandleDrag(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
nsIFrame * FindHitFrame(nsBlockFrame * aBlockFrame,
const nscoord aX, const nscoord aY,
const nsPoint & aPoint);
#endif
virtual PRBool DeleteChildsNextInFlow(nsIPresContext& aPresContext,
nsIFrame* aNextInFlow);
void SetFlags(PRUint32 aFlags) {
mFlags = aFlags;
}
void RecoverLineMargins(nsBlockReflowState& aState,
LineData* aPrevLine,
nscoord& aTopMarginResult,
nscoord& aBottomMarginResult);
PRUintn CalculateMargins(nsBlockReflowState& aState,
LineData* aLine,
PRBool aInlineContext,
nscoord& aTopMarginResult,
nscoord& aBottomMarginResult);
void SlideFrames(LineData* aLine, nscoord aDY);
PRBool DrainOverflowLines();
PRBool RemoveChild(LineData* aLines, nsIFrame* aChild);
PRIntn GetSkipSides() const;
PRBool IsPseudoFrame() const;
nsresult InitialReflow(nsBlockReflowState& aState);
nsresult FrameAppendedReflow(nsBlockReflowState& aState);
nsresult InsertNewFrame(nsIPresContext& aPresContext,
nsBlockFrame* aParentFrame,
nsIFrame* aNewFrame,
nsIFrame* aPrevSibling);
nsresult FrameInsertedReflow(nsBlockReflowState& aState);
nsresult FrameRemovedReflow(nsBlockReflowState& aState);
nsresult StyleChangedReflow(nsBlockReflowState& aState);
nsresult FindTextRuns(nsBlockReflowState& aState);
nsresult ChildIncrementalReflow(nsBlockReflowState& aState);
nsresult ResizeReflow(nsBlockReflowState& aState);
void ComputeFinalSize(nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics);
nsresult ReflowLinesAt(nsBlockReflowState& aState, LineData* aLine);
PRBool ReflowLine(nsBlockReflowState& aState,
LineData* aLine,
nsReflowStatus& aReflowResult);
PRBool PlaceLine(nsBlockReflowState& aState,
LineData* aLine,
nsReflowStatus aReflowStatus);
void FindFloaters(LineData* aLine);
void PrepareInlineReflow(nsBlockReflowState& aState, nsIFrame* aFrame, PRBool aIsBlock);
PRBool ReflowInlineFrame(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
nsReflowStatus& aResult);
nsresult SplitLine(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
PRBool aLineWasComplete);
PRBool ReflowBlockFrame(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
nsReflowStatus& aResult);
PRBool PullFrame(nsBlockReflowState& aState,
LineData* aToLine,
LineData** aFromList,
PRBool aUpdateGeometricParent,
nsReflowStatus& aResult);
void PushLines(nsBlockReflowState& aState);
void ReflowFloater(nsIPresContext& aPresContext,
nsBlockReflowState& aState,
nsIFrame* aFloaterFrame);
void PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
void PaintChild(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsIFrame* aFrame,
PRBool aAlwaysRender);
nsresult AppendNewFrames(nsIPresContext& aPresContext, nsIFrame*);
void RenumberLists(nsBlockReflowState& aState);
#ifdef NS_DEBUG
PRBool IsChild(nsIFrame* aFrame);
#endif
LineData* mLines;
LineData* mOverflowLines;
// Text run information
nsTextRun* mTextRuns;
// For list-item frames, this is the bullet frame.
BulletFrame* mBullet;
// Body configuration flags passed into this block when this block
// is used by the body.
PRUint32 mFlags;
};
//----------------------------------------------------------------------
class BulletFrame : public nsFrame {
public:
BulletFrame(nsIContent* aContent, nsIFrame* aParentFrame);
virtual ~BulletFrame();
// nsIFrame
NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
NS_IMETHOD Paint(nsIPresContext &aCX,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD ListTag(FILE* out) const;
NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
// nsIHTMLReflow
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
void SetListItemOrdinal(nsBlockReflowState& aBlockState);
void GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics);
void GetListItemText(nsIPresContext& aCX,
const nsStyleList& aMol,
nsString& aResult);
PRInt32 mOrdinal;
nsMargin mPadding;
nsHTMLImageLoader mImageLoader;
};
BulletFrame::BulletFrame(nsIContent* aContent, nsIFrame* aParentFrame)
: nsFrame(aContent, aParentFrame)
{
}
BulletFrame::~BulletFrame()
{
}
NS_IMETHODIMP
BulletFrame::DeleteFrame(nsIPresContext& aPresContext)
{
// Release image loader first so that it's refcnt can go to zero
mImageLoader.DestroyLoader();
return nsFrame::DeleteFrame(aPresContext);
}
NS_IMETHODIMP
BulletFrame::ListTag(FILE* out) const
{
fprintf(out, "Bullet(%d)@%p", ContentIndexInContainer(this), this);
return NS_OK;
}
NS_IMETHODIMP
BulletFrame::List(FILE* out, PRInt32 aIndent) const
{
PRInt32 i;
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fprintf(out, "Bullet(%d)@%p ", ContentIndexInContainer(this), this);
nsIView* view;
GetView(view);
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
out << mRect;
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
fputs("<>\n", out);
return NS_OK;
}
NS_METHOD
BulletFrame::Paint(nsIPresContext& aCX,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
nscoord width;
if (disp->mVisible) {
const nsStyleList* myList =
(const nsStyleList*)mStyleContext->GetStyleData(eStyleStruct_List);
if (myList->mListStyleImage.Length() > 0) {
nsIImage* image = mImageLoader.GetImage();
if (nsnull == image) {
if (!mImageLoader.GetLoadImageFailed()) {
// No image yet
return NS_OK;
}
}
else {
nsRect innerArea(mPadding.left, mPadding.top,
mRect.width - (mPadding.left + mPadding.right),
mRect.height - (mPadding.top + mPadding.bottom));
aRenderingContext.DrawImage(image, innerArea);
return NS_OK;
}
}
const nsStyleFont* myFont =
(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
const nsStyleColor* myColor =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
nsIFontMetrics* fm;
aRenderingContext.SetColor(myColor->mColor);
nsAutoString text;
switch (myList->mListStyleType) {
case NS_STYLE_LIST_STYLE_NONE:
break;
default:
case NS_STYLE_LIST_STYLE_BASIC:
case NS_STYLE_LIST_STYLE_DISC:
aRenderingContext.FillEllipse(mPadding.left, mPadding.top,
mRect.width - (mPadding.left + mPadding.right),
mRect.height - (mPadding.top + mPadding.bottom));
break;
case NS_STYLE_LIST_STYLE_CIRCLE:
aRenderingContext.DrawEllipse(mPadding.left, mPadding.top,
mRect.width - (mPadding.left + mPadding.right),
mRect.height - (mPadding.top + mPadding.bottom));
break;
case NS_STYLE_LIST_STYLE_SQUARE:
aRenderingContext.FillRect(mPadding.left, mPadding.top,
mRect.width - (mPadding.left + mPadding.right),
mRect.height - (mPadding.top + mPadding.bottom));
break;
case NS_STYLE_LIST_STYLE_DECIMAL:
case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
fm = aCX.GetMetricsFor(myFont->mFont);
GetListItemText(aCX, *myList, text);
aRenderingContext.SetFont(fm);
aRenderingContext.GetWidth(text, width);
aRenderingContext.DrawString(text, mPadding.left, mPadding.top, width);
NS_RELEASE(fm);
break;
}
}
return NS_OK;
}
void
BulletFrame::SetListItemOrdinal(nsBlockReflowState& aReflowState)
{
// Assume that the ordinal comes from the block reflow state
mOrdinal = aReflowState.mNextListOrdinal;
// Try to get value directly from the list-item, if it specifies a
// value attribute. Note: we do this with our parent's content
// because our parent is the list-item.
nsHTMLValue value;
nsIContent* parentContent;
mContentParent->GetContent(parentContent);
nsIHTMLContent* hc;
if (NS_OK == parentContent->QueryInterface(kIHTMLContentIID, (void**) &hc)) {
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetAttribute(nsHTMLAtoms::value, value)) {
if (eHTMLUnit_Integer == value.GetUnit()) {
// Use ordinal specified by the value attribute
mOrdinal = value.GetIntValue();
if (mOrdinal <= 0) {
mOrdinal = 1;
}
}
}
NS_RELEASE(hc);
}
NS_RELEASE(parentContent);
aReflowState.mNextListOrdinal = mOrdinal + 1;
}
static const char* gLowerRomanCharsA = "ixcm";
static const char* gUpperRomanCharsA = "IXCM";
static const char* gLowerRomanCharsB = "vld?";
static const char* gUpperRomanCharsB = "VLD?";
static const char* gLowerAlphaChars = "abcdefghijklmnopqrstuvwxyz";
static const char* gUpperAlphaChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
// XXX change roman/alpha to use unsigned math so that maxint and
// maxnegint will work
void
BulletFrame::GetListItemText(nsIPresContext& aCX,
const nsStyleList& aListStyle,
nsString& result)
{
PRInt32 ordinal = mOrdinal;
char cbuf[40];
switch (aListStyle.mListStyleType) {
case NS_STYLE_LIST_STYLE_DECIMAL:
PR_snprintf(cbuf, sizeof(cbuf), "%ld", ordinal);
result.Append(cbuf);
break;
case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
{
if (ordinal <= 0) {
ordinal = 1;
}
nsAutoString addOn, decStr;
decStr.Append(ordinal, 10);
PRIntn len = decStr.Length();
const PRUnichar* dp = decStr.GetUnicode();
const PRUnichar* end = dp + len;
PRIntn romanPos = len;
PRIntn n;
const char* achars;
const char* bchars;
if (aListStyle.mListStyleType == NS_STYLE_LIST_STYLE_LOWER_ROMAN) {
achars = gLowerRomanCharsA;
bchars = gLowerRomanCharsB;
}
else {
achars = gUpperRomanCharsA;
bchars = gUpperRomanCharsB;
}
for (; dp < end; dp++) {
romanPos--;
addOn.SetLength(0);
switch(*dp) {
case '3': addOn.Append(achars[romanPos]);
case '2': addOn.Append(achars[romanPos]);
case '1': addOn.Append(achars[romanPos]);
break;
case '4':
addOn.Append(achars[romanPos]);
// FALLTHROUGH
case '5': case '6':
case '7': case '8':
addOn.Append(bchars[romanPos]);
for(n=0;n<(*dp-'5');n++) {
addOn.Append(achars[romanPos]);
}
break;
case '9':
addOn.Append(achars[romanPos]);
addOn.Append(achars[romanPos+1]);
break;
default:
break;
}
result.Append(addOn);
}
}
break;
case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
{
PRInt32 anOffset = -1;
PRInt32 aBase = 26;
PRInt32 ndex=0;
PRInt32 root=1;
PRInt32 next=aBase;
PRInt32 expn=1;
const char* chars =
(aListStyle.mListStyleType == NS_STYLE_LIST_STYLE_LOWER_ALPHA)
? gLowerAlphaChars : gUpperAlphaChars;
// must be positive here...
if (ordinal <= 0) {
ordinal = 1;
}
ordinal--; // a == 0
// scale up in baseN; exceed current value.
while (next<=ordinal) {
root=next;
next*=aBase;
expn++;
}
while (0!=(expn--)) {
ndex = ((root<=ordinal) && (0!=root)) ? (ordinal/root): 0;
ordinal %= root;
if (root>1)
result.Append(chars[ndex+anOffset]);
else
result.Append(chars[ndex]);
root /= aBase;
}
}
break;
}
result.Append(".");
}
#define MIN_BULLET_SIZE 5 // from laytext.c
static nsresult
UpdateBulletCB(nsIPresContext& aPresContext, nsIFrame* aFrame, PRIntn aStatus)
{
nsresult rv = NS_OK;
if (NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE & aStatus) {
// Now that the size is available, trigger a reflow of the bullet
// frame.
nsIPresShell* shell;
shell = aPresContext.GetShell();
if (nsnull != shell) {
nsIReflowCommand* cmd;
rv = NS_NewHTMLReflowCommand(&cmd, aFrame,
nsIReflowCommand::ContentChanged);
if (NS_OK == rv) {
shell->EnterReflowLock();
shell->AppendReflowCommand(cmd);
NS_RELEASE(cmd);
shell->ExitReflowLock();
}
NS_RELEASE(shell);
}
}
return rv;
}
void
BulletFrame::GetDesiredSize(nsIPresContext* aCX,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics)
{
const nsStyleList* myList =
(const nsStyleList*)mStyleContext->GetStyleData(eStyleStruct_List);
nscoord ascent;
if (myList->mListStyleImage.Length() > 0) {
mImageLoader.SetURL(myList->mListStyleImage);
mImageLoader.GetDesiredSize(aCX, aReflowState, this, UpdateBulletCB,
aMetrics);
if (!mImageLoader.GetLoadImageFailed()) {
nsHTMLContainerFrame::CreateViewForFrame(*aCX, this, mStyleContext,
PR_FALSE);
aMetrics.ascent = aMetrics.height;
aMetrics.descent = 0;
return;
}
}
const nsStyleFont* myFont =
(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
nsIFontMetrics* fm = aCX->GetMetricsFor(myFont->mFont);
nscoord bulletSize;
float p2t;
float t2p;
nsAutoString text;
switch (myList->mListStyleType) {
case NS_STYLE_LIST_STYLE_NONE:
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
break;
default:
case NS_STYLE_LIST_STYLE_DISC:
case NS_STYLE_LIST_STYLE_CIRCLE:
case NS_STYLE_LIST_STYLE_BASIC:
case NS_STYLE_LIST_STYLE_SQUARE:
t2p = aCX->GetTwipsToPixels();
fm->GetMaxAscent(ascent);
bulletSize = NSTwipsToIntPixels((nscoord)NSToIntRound(0.8f * (float(ascent) / 2.0f)), t2p);
if (bulletSize < 1) {
bulletSize = MIN_BULLET_SIZE;
}
p2t = aCX->GetPixelsToTwips();
bulletSize = NSIntPixelsToTwips(bulletSize, p2t);
mPadding.bottom = ascent / 8;
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == myList->mListStylePosition) {
mPadding.right = bulletSize / 2;
}
aMetrics.width = mPadding.right + bulletSize;
aMetrics.height = mPadding.bottom + bulletSize;
aMetrics.ascent = mPadding.bottom + bulletSize;
aMetrics.descent = 0;
break;
case NS_STYLE_LIST_STYLE_DECIMAL:
case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
GetListItemText(*aCX, *myList, text);
fm->GetHeight(aMetrics.height);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == myList->mListStylePosition) {
// Inside bullets need some extra width to get the padding
// between the list item and the content that follows.
mPadding.right = aMetrics.height / 2; // From old layout engine
}
aReflowState.rendContext->SetFont(fm);
aReflowState.rendContext->GetWidth(text, aMetrics.width);
aMetrics.width += mPadding.right;
fm->GetMaxAscent(aMetrics.ascent);
fm->GetMaxDescent(aMetrics.descent);
break;
}
NS_RELEASE(fm);
}
NS_IMETHODIMP
BulletFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Get the base size
GetDesiredSize(&aPresContext, aReflowState, aMetrics);
// Add in the border and padding; split the top/bottom between the
// ascent and descent to make things look nice
const nsStyleSpacing* space =(const nsStyleSpacing*)
mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin borderPadding;
space->CalcBorderPaddingFor(this, borderPadding);
aMetrics.width += borderPadding.left + borderPadding.right;
aMetrics.height += borderPadding.top + borderPadding.bottom;
aMetrics.ascent += borderPadding.top;
aMetrics.descent += borderPadding.bottom;
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = aMetrics.width;
aMetrics.maxElementSize->height = aMetrics.height;
}
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
//----------------------------------------------------------------------
#define LINE_IS_DIRTY 0x1
#define LINE_IS_BLOCK 0x2
#define LINE_LAST_CONTENT_IS_COMPLETE 0x4
#define LINE_NEED_DID_REFLOW 0x8
#define LINE_TOP_MARGIN_IS_AUTO 0x10
#define LINE_BOTTOM_MARGIN_IS_AUTO 0x20
struct LineData {
LineData(nsIFrame* aFrame, PRInt32 aCount, PRUint16 flags) {
mFirstChild = aFrame;
mChildCount = aCount;
mState = LINE_IS_DIRTY | LINE_NEED_DID_REFLOW | flags;
mFloaters = nsnull;
mNext = nsnull;
mBounds.SetRect(0,0,0,0);
mCarriedOutTopMargin = 0;
mCarriedOutBottomMargin = 0;
}
~LineData();
void List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter = nsnull,
PRBool aOutputMe=PR_TRUE) const;
nsIFrame* LastChild() const;
PRBool IsLastChild(nsIFrame* aFrame) const;
void SetLastContentIsComplete() {
mState |= LINE_LAST_CONTENT_IS_COMPLETE;
}
void ClearLastContentIsComplete() {
mState &= ~LINE_LAST_CONTENT_IS_COMPLETE;
}
void SetLastContentIsComplete(PRBool aValue) {
if (aValue) {
SetLastContentIsComplete();
}
else {
ClearLastContentIsComplete();
}
}
PRBool GetLastContentIsComplete() {
return 0 != (LINE_LAST_CONTENT_IS_COMPLETE & mState);
}
PRBool IsBlock() const {
return 0 != (LINE_IS_BLOCK & mState);
}
void SetIsBlock() {
mState |= LINE_IS_BLOCK;
}
void ClearIsBlock() {
mState &= ~LINE_IS_BLOCK;
}
void SetIsBlock(PRBool aValue) {
if (aValue) {
SetIsBlock();
}
else {
ClearIsBlock();
}
}
void MarkDirty() {
mState |= LINE_IS_DIRTY;
}
void ClearDirty() {
mState &= ~LINE_IS_DIRTY;
}
void SetNeedDidReflow() {
mState |= LINE_NEED_DID_REFLOW;
}
void ClearNeedDidReflow() {
mState &= ~LINE_NEED_DID_REFLOW;
}
PRBool NeedsDidReflow() {
return 0 != (LINE_NEED_DID_REFLOW & mState);
}
PRBool IsDirty() const {
return 0 != (LINE_IS_DIRTY & mState);
}
PRUint16 GetState() const { return mState; }
char* StateToString(char* aBuf, PRInt32 aBufSize) const;
PRBool Contains(nsIFrame* aFrame) const;
void SetMarginFlags(PRUintn aFlags) {
mState &= ~(LINE_TOP_MARGIN_IS_AUTO|LINE_BOTTOM_MARGIN_IS_AUTO);
if (NS_CARRIED_TOP_MARGIN_IS_AUTO & aFlags) {
mState |= LINE_TOP_MARGIN_IS_AUTO;
}
if (NS_CARRIED_BOTTOM_MARGIN_IS_AUTO & aFlags) {
mState |= LINE_BOTTOM_MARGIN_IS_AUTO;
}
}
PRUintn GetMarginFlags() {
return ((LINE_TOP_MARGIN_IS_AUTO & mState)
? NS_CARRIED_TOP_MARGIN_IS_AUTO : 0) |
((LINE_BOTTOM_MARGIN_IS_AUTO & mState) ?
NS_CARRIED_BOTTOM_MARGIN_IS_AUTO : 0);
}
#ifdef NS_DEBUG
void Verify();
#endif
nsIFrame* mFirstChild;
PRUint16 mChildCount;
PRUint16 mState;
nsRect mBounds;
nscoord mCarriedOutTopMargin;
nscoord mCarriedOutBottomMargin;
nsVoidArray* mFloaters;
LineData* mNext;
};
LineData::~LineData()
{
if (nsnull != mFloaters) {
delete mFloaters;
}
}
static void
ListFloaters(FILE* out, nsVoidArray* aFloaters)
{
PRInt32 i, n = aFloaters->Count();
for (i = 0; i < n; i++) {
nsIFrame* frame = (nsIFrame*) aFloaters->ElementAt(i);
frame->ListTag(out);
if (i < n - 1) fputs(" ", out);
}
}
static void
ListTextRuns(FILE* out, PRInt32 aIndent, nsTextRun* aRuns)
{
while (nsnull != aRuns) {
aRuns->List(out, aIndent);
aRuns = aRuns->mNext;
}
}
char*
LineData::StateToString(char* aBuf, PRInt32 aBufSize) const
{
PR_snprintf(aBuf, aBufSize, "%s,%s,%scomplete",
(mState & LINE_IS_DIRTY) ? "dirty" : "clean",
(mState & LINE_IS_BLOCK) ? "block" : "inline",
(mState & LINE_LAST_CONTENT_IS_COMPLETE) ? "" : "!");
return aBuf;
}
void
LineData::List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter,
PRBool aOutputMe) const
{
PRInt32 i;
if (aOutputMe) {
for (i = aIndent; --i >= 0; ) fputs(" ", out);
char cbuf[100];
fprintf(out, "line %p: count=%d state=%s",
this, mChildCount, StateToString(cbuf, sizeof(cbuf)));
if (0 != mCarriedOutTopMargin) {
fprintf(out, " tm=%d", mCarriedOutTopMargin);
}
if (0 != mCarriedOutBottomMargin) {
fprintf(out, " bm=%d", mCarriedOutBottomMargin);
}
out << mBounds;
fprintf(out, "<\n");
}
nsIFrame* frame = mFirstChild;
PRInt32 n = mChildCount;
while (--n >= 0) {
frame->List(out, aIndent + 1, aFilter);
frame->GetNextSibling(frame);
}
if (aOutputMe) {
for (i = aIndent; --i >= 0; ) fputs(" ", out);
if (nsnull != mFloaters) {
fputs("> bcl-floaters=<", out);
ListFloaters(out, mFloaters);
}
fputs(">\n", out);
}
}
nsIFrame*
LineData::LastChild() const
{
nsIFrame* frame = mFirstChild;
PRInt32 n = mChildCount - 1;
while (--n >= 0) {
frame->GetNextSibling(frame);
}
return frame;
}
PRBool
LineData::IsLastChild(nsIFrame* aFrame) const
{
nsIFrame* lastFrame = LastChild();
return aFrame == lastFrame;
}
PRBool
LineData::Contains(nsIFrame* aFrame) const
{
PRInt32 n = mChildCount;
nsIFrame* frame = mFirstChild;
while (--n >= 0) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(frame);
}
return PR_FALSE;
}
static PRInt32
LengthOf(nsIFrame* aFrame)
{
PRInt32 result = 0;
while (nsnull != aFrame) {
result++;
aFrame->GetNextSibling(aFrame);
}
return result;
}
#ifdef NS_DEBUG
void
LineData::Verify()
{
nsIFrame* lastFrame = LastChild();
if (nsnull != lastFrame) {
nsIFrame* nextInFlow;
lastFrame->GetNextInFlow(nextInFlow);
if (GetLastContentIsComplete()) {
NS_ASSERTION(nsnull == nextInFlow, "bad mState");
}
if (nsnull != mNext) {
nsIFrame* nextSibling;
lastFrame->GetNextSibling(nextSibling);
NS_ASSERTION(mNext->mFirstChild == nextSibling, "bad line list");
}
}
PRInt32 len = LengthOf(mFirstChild);
NS_ASSERTION(len >= mChildCount, "bad mChildCount");
}
static void
VerifyLines(LineData* aLine)
{
while (nsnull != aLine) {
aLine->Verify();
aLine = aLine->mNext;
}
}
static void
VerifyChildCount(LineData* aLines, PRBool aEmptyOK = PR_FALSE)
{
if (nsnull != aLines) {
PRInt32 childCount = LengthOf(aLines->mFirstChild);
PRInt32 sum = 0;
LineData* line = aLines;
while (nsnull != line) {
if (!aEmptyOK) {
NS_ASSERTION(0 != line->mChildCount, "empty line left in line list");
}
sum += line->mChildCount;
line = line->mNext;
}
if (sum != childCount) {
printf("Bad sibling list/line mChildCount's\n");
LineData* line = aLines;
while (nsnull != line) {
line->List(stdout, 1);
if (nsnull != line->mNext) {
nsIFrame* lastFrame = line->LastChild();
if (nsnull != lastFrame) {
nsIFrame* nextSibling;
lastFrame->GetNextSibling(nextSibling);
if (line->mNext->mFirstChild != nextSibling) {
printf(" [list broken: nextSibling=%p mNext->mFirstChild=%p]\n",
nextSibling, line->mNext->mFirstChild);
}
}
}
line = line->mNext;
}
NS_ASSERTION(sum == childCount, "bad sibling list/line mChildCount's");
}
}
}
#endif
static void
DeleteLineList(nsIPresContext& aPresContext, LineData* aLine)
{
if (nsnull != aLine) {
// Delete our child frames before doing anything else. In particular
// we do all of this before our base class releases it's hold on the
// view.
for (nsIFrame* child = aLine->mFirstChild; child; ) {
nsIFrame* nextChild;
child->GetNextSibling(nextChild);
child->DeleteFrame(aPresContext);
child = nextChild;
}
while (nsnull != aLine) {
LineData* next = aLine->mNext;
delete aLine;
aLine = next;
}
}
}
static LineData*
LastLine(LineData* aLine)
{
if (nsnull != aLine) {
while (nsnull != aLine->mNext) {
aLine = aLine->mNext;
}
}
return aLine;
}
static LineData*
FindLineContaining(LineData* aLine, nsIFrame* aFrame)
{
while (nsnull != aLine) {
if (aLine->Contains(aFrame)) {
return aLine;
}
aLine = aLine->mNext;
}
return nsnull;
}
//----------------------------------------------------------------------
void
nsBlockReflowState::BlockBandData::ComputeAvailSpaceRect()
{
nsBandTrapezoid* trapezoid = data;
if (count > 1) {
// If there's more than one trapezoid that means there are floaters
PRInt32 i;
// Stop when we get to space occupied by a right floater, or when we've
// looked at every trapezoid and none are right floaters
for (i = 0; i < count; i++) {
nsBandTrapezoid* trapezoid = &data[i];
if (trapezoid->state != nsBandTrapezoid::Available) {
const nsStyleDisplay* display;
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
PRInt32 j, numFrames = trapezoid->frames->Count();
NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
for (j = 0; j < numFrames; j++) {
nsIFrame* f = (nsIFrame*)trapezoid->frames->ElementAt(j);
f->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
goto foundRightFloater;
}
}
} else {
trapezoid->frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
break;
}
}
}
}
foundRightFloater:
if (i > 0) {
trapezoid = &data[i - 1];
}
}
if (nsBandTrapezoid::Available == trapezoid->state) {
// The trapezoid is available
trapezoid->GetRect(availSpace);
} else {
const nsStyleDisplay* display;
// The trapezoid is occupied. That means there's no available space
trapezoid->GetRect(availSpace);
// XXX Better handle the case of multiple frames
if (nsBandTrapezoid::Occupied == trapezoid->state) {
trapezoid->frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
availSpace.x = availSpace.XMost();
}
}
availSpace.width = 0;
}
}
//----------------------------------------------------------------------
nsBlockReflowState::nsBlockReflowState(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
const nsHTMLReflowMetrics& aMetrics)
: nsFrameReflowState(aPresContext, aReflowState, aMetrics),
mLineLayout(aPresContext, aReflowState.spaceManager)
{
mInlineReflow = nsnull;
mLineLayout.Init(this);
mSpaceManager = aReflowState.spaceManager;
// Translate into our content area and then save the
// coordinate system origin for later.
mSpaceManager->Translate(mBorderPadding.left, mBorderPadding.top);
mSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
mPresContext = aPresContext;
mBlock = (nsBlockFrame*) frame;
mBlock->GetNextInFlow((nsIFrame*&)mNextInFlow);
mKidXMost = 0;
mY = 0;
mUnconstrainedWidth = maxSize.width == NS_UNCONSTRAINEDSIZE;
mUnconstrainedHeight = maxSize.height == NS_UNCONSTRAINEDSIZE;
#ifdef NS_DEBUG
if (!mUnconstrainedWidth && (maxSize.width > 100000)) {
mBlock->ListTag(stdout);
printf(": bad parent: maxSize WAS %d,%d\n", maxSize.width, maxSize.height);
maxSize.width = NS_UNCONSTRAINEDSIZE;
mUnconstrainedWidth = PR_TRUE;
}
if (!mUnconstrainedHeight && (maxSize.height > 100000)) {
mBlock->ListTag(stdout);
printf(": bad parent: maxSize WAS %d,%d\n", maxSize.width, maxSize.height);
maxSize.height = NS_UNCONSTRAINEDSIZE;
mUnconstrainedHeight = PR_TRUE;
}
#endif
mTextAlign = mStyleText->mTextAlign;
mPrevMarginFlags = 0;
nscoord lr = mBorderPadding.left + mBorderPadding.right;
mY = mBorderPadding.top;
// Get and apply the stylistic size. Note: do not limit the
// height until we are done reflowing.
PRIntn ss = nsCSSLayout::GetStyleSize(&aPresContext, aReflowState,
mStyleSize);
mStyleSizeFlags = ss;
if (0 != (ss & NS_SIZE_HAS_WIDTH)) {
// The CSS2 spec says that the width attribute defines the
// width of the "content area" which does not include the
// border padding. So we add those back in.
mBorderArea.width = mStyleSize.width + lr;
mContentArea.width = mStyleSize.width;
}
else {
if (mUnconstrainedWidth) {
mBorderArea.width = NS_UNCONSTRAINEDSIZE;
mContentArea.width = NS_UNCONSTRAINEDSIZE;
}
else {
mBorderArea.width = maxSize.width;
mContentArea.width = maxSize.width - lr;
}
}
mBorderArea.height = maxSize.height;
mContentArea.height = maxSize.height;
mBottomEdge = maxSize.height;
if (!mUnconstrainedHeight) {
mBottomEdge -= mBorderPadding.bottom;
}
mPrevChild = nsnull;
mFreeList = nsnull;
mPrevLine = nsnull;
}
nsBlockReflowState::~nsBlockReflowState()
{
// Restore the coordinate system
mSpaceManager->Translate(-mBorderPadding.left, -mBorderPadding.top);
LineData* line = mFreeList;
while (nsnull != line) {
NS_ASSERTION((0 == line->mChildCount) && (nsnull == line->mFirstChild),
"bad free line");
LineData* next = line->mNext;
delete line;
line = next;
}
}
// 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
nsBlockReflowState::GetAvailableSpace()
{
nsISpaceManager* sm = mSpaceManager;
#ifdef NS_DEBUG
// Verify that the caller setup the coordinate system properly
nscoord wx, wy;
sm->GetTranslation(wx, wy);
NS_ASSERTION((wx == mSpaceManagerX) && (wy == mSpaceManagerY),
"bad coord system");
#endif
// Fill in band data for the specific Y coordinate. Because the
// space manager is pre-translated into our content-area (so that
// nested blocks/inlines will line up properly), we have to remove
// the Y translation for find the band coordinates relative to our
// upper left corner (0,0).
// In addition, we need to use the entire available area
// (represented by mBorderArea) so that the band data is completely
// relative in size to our upper left corner.
sm->GetBandData(mY - mBorderPadding.top, mContentArea, mCurrentBand);
// Compute the bounding rect of the available space, i.e. space
// between any left and right floaters.
mCurrentBand.ComputeAvailSpaceRect();
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsBlockReflowState::GetAvailableSpace: band={%d,%d,%d,%d} count=%d",
mCurrentBand.availSpace.x, mCurrentBand.availSpace.y,
mCurrentBand.availSpace.width, mCurrentBand.availSpace.height,
mCurrentBand.count));
}
//----------------------------------------------------------------------
nsresult
NS_NewBlockFrame(nsIContent* aContent, nsIFrame* aParentFrame,
nsIFrame*& aNewFrame, PRUint32 aFlags)
{
nsBlockFrame* it = new nsBlockFrame(aContent, aParentFrame);
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
aNewFrame = it;
it->SetFlags(aFlags);
return NS_OK;
}
nsBlockFrame::nsBlockFrame(nsIContent* aContent, nsIFrame* aParent)
: nsBlockFrameSuper(aContent, aParent)
{
}
nsBlockFrame::~nsBlockFrame()
{
nsTextRun::DeleteTextRuns(mTextRuns);
}
NS_IMETHODIMP
nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kBlockFrameCID)) {
*aInstancePtr = (void*) (this);
return NS_OK;
}
if (aIID.Equals(kIFloaterContainerIID)) {
*aInstancePtr = (void*) ((nsIFloaterContainer*) this);
return NS_OK;
}
return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsBlockFrame::Init(nsIPresContext& aPresContext, nsIFrame* aChildList)
{
nsresult rv = AppendNewFrames(aPresContext, aChildList);
if (NS_OK != 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)) {
// Create bullet frame
mBullet = new BulletFrame(mContent, this);
if (nsnull == mBullet) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Resolve style for the bullet frame
nsIStyleContext* kidSC;
kidSC = aPresContext.ResolvePseudoStyleContextFor(nsHTMLAtoms::bulletPseudo, this);
mBullet->SetStyleContext(&aPresContext, kidSC);
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) {
InsertNewFrame(aPresContext, this, mBullet, nsnull);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::DeleteFrame(nsIPresContext& aPresContext)
{
// When we have a bullet frame and it's not in our child list then
// we need to delete it ourselves (this is the common case for
// list-item's that have outside bullets).
if ((nsnull != mBullet) &&
((nsnull == mLines) || (mBullet != mLines->mFirstChild))) {
mBullet->DeleteFrame(aPresContext);
}
DeleteLineList(aPresContext, mLines);
DeleteLineList(aPresContext, mOverflowLines);
nsBlockFrameSuper::DeleteFrame(aPresContext);
return NS_OK;
}
PRBool
nsBlockFrame::IsPseudoFrame() const
{
PRBool result = PR_FALSE;
if (nsnull != mGeometricParent) {
nsIContent* parentContent;
mGeometricParent->GetContent(parentContent);
if (parentContent == mContent) {
result = PR_TRUE;
}
NS_RELEASE(parentContent);
}
return result;
}
NS_IMETHODIMP
nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
{
aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::CreateContinuingFrame(nsIPresContext& aCX,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame)
{
nsBlockFrame* cf = new nsBlockFrame(mContent, aParent);
if (nsnull == cf) {
return NS_ERROR_OUT_OF_MEMORY;
}
PrepareContinuingFrame(aCX, aParent, aStyleContext, cf);
aContinuingFrame = cf;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::CreateContinuingFrame: newFrame=%p", cf));
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::ListTag(FILE* out) const
{
if ((nsnull != mGeometricParent) && IsPseudoFrame()) {
fprintf(out, "*block<");
nsIAtom* atom;
mContent->GetTag(atom);
if (nsnull != atom) {
nsAutoString tmp;
atom->ToString(tmp);
fputs(tmp, out);
}
fprintf(out, ">(%d)@%p", ContentIndexInContainer(this), this);
} else {
nsBlockFrameSuper::ListTag(out);
}
return NS_OK;
}
NS_METHOD
nsBlockFrame::List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const
{
// if a filter is present, only output this frame if the filter says we should
nsIAtom* tag;
nsAutoString tagString;
mContent->GetTag(tag);
if (tag != nsnull)
{
tag->ToString(tagString);
NS_RELEASE(tag);
}
PRInt32 i;
PRBool outputMe = (PRBool)((nsnull==aFilter) || ((PR_TRUE==aFilter->OutputTag(&tagString)) && (!IsPseudoFrame())));
if (PR_TRUE==outputMe)
{
// Indent
for (i = aIndent; --i >= 0; ) fputs(" ", out);
// Output the tag
ListTag(out);
nsIView* view;
GetView(view);
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
// 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
out << mRect;
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
}
// Output the children, one line at a time
if (nsnull != mLines) {
if (PR_TRUE==outputMe)
fputs("<\n", out);
aIndent++;
LineData* line = mLines;
while (nsnull != line) {
line->List(out, aIndent, aFilter, outputMe);
line = line->mNext;
}
aIndent--;
if (PR_TRUE==outputMe)
{
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fputs(">", out);
}
}
else {
if (PR_TRUE==outputMe)
fputs("<>", out);
}
if (PR_TRUE==outputMe)
{
// Output the text-runs
if (nsnull != mTextRuns) {
fputs(" text-runs=<\n", out);
ListTextRuns(out, aIndent + 1, mTextRuns);
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fputs(">", out);
}
fputs("\n", out);
}
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////
// Child frame enumeration
NS_IMETHODIMP
nsBlockFrame::FirstChild(nsIFrame*& aFirstChild) const
{
aFirstChild = (nsnull != mLines) ? mLines->mFirstChild : nsnull;
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Reflow methods
NS_IMETHODIMP
nsBlockFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsBlockFrame::Reflow: maxSize=%d,%d reason=%d",
aReflowState.maxSize.width,
aReflowState.maxSize.height,
aReflowState.reason));
// If this is the initial reflow, generate any synthetic content
// that needs generating.
if (eReflowReason_Initial == aReflowState.reason) {
NS_ASSERTION(0 != (NS_FRAME_FIRST_REFLOW & mState), "bad mState");
}
else {
NS_ASSERTION(0 == (NS_FRAME_FIRST_REFLOW & mState), "bad mState");
}
// Replace parent provided reflow state with our own significantly
// more extensive version.
nsBlockReflowState state(aPresContext, aReflowState, aMetrics);
if (NS_BODY_NO_AUTO_MARGINS & mFlags) {
// Pretend that there is a really big bottom margin preceeding the
// first line so that it's margin is never applied.
}
if (NS_BODY_THE_BODY & mFlags) {
state.mIsMarginRoot = PR_TRUE;
}
// Prepare inline-reflow engine
nsInlineReflow inlineReflow(state.mLineLayout, state, this, PR_TRUE);
state.mInlineReflow = &inlineReflow;
state.mLineLayout.PushInline(&inlineReflow);
// ListTag(stdout); printf(": enter isMarginRoot=%c\n", state.mIsMarginRoot?'T':'F');
nsresult rv = NS_OK;
if (eReflowReason_Initial == state.reason) {
RenumberLists(state);
if (!DrainOverflowLines()) {
rv = InitialReflow(state);
}
else {
rv = ResizeReflow(state);
}
mState &= ~NS_FRAME_FIRST_REFLOW;
}
else if (eReflowReason_Incremental == state.reason) {
#if XXX
// We can have an overflow here if our parent doesn't bother to
// continue us
DrainOverflowLines();
#endif
nsIFrame* target;
state.reflowCommand->GetTarget(target);
if (this == target) {
RenumberLists(state);
nsIReflowCommand::ReflowType type;
state.reflowCommand->GetType(type);
switch (type) {
case nsIReflowCommand::FrameAppended:
rv = FrameAppendedReflow(state);
break;
case nsIReflowCommand::FrameInserted:
rv = FrameInsertedReflow(state);
break;
case nsIReflowCommand::FrameRemoved:
rv = FrameRemovedReflow(state);
break;
case nsIReflowCommand::StyleChanged:
rv = StyleChangedReflow(state);
break;
default:
// Map any other incremental operations into full reflows
rv = ResizeReflow(state);
break;
}
}
else {
// Get next frame in reflow command chain
state.reflowCommand->GetNext(state.mNextRCFrame);
// Now do the reflow
rv = ChildIncrementalReflow(state);
}
}
else if (eReflowReason_Resize == state.reason) {
DrainOverflowLines();
rv = ResizeReflow(state);
}
// Compute our final size
ComputeFinalSize(state, aMetrics);
// ListTag(stdout); printf(": exit carriedMargins=%d,%d\n", aMetrics.mCarriedOutTopMargin, aMetrics.mCarriedOutBottomMargin);
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
VerifyChildCount(mLines);
VerifyLines(mLines);
}
#endif
aStatus = rv;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsBlockFrame::Reflow: size=%d,%d rv=%x",
aMetrics.width, aMetrics.height, rv));
return NS_OK;
}
void
nsBlockFrame::RenumberLists(nsBlockReflowState& aState)
{
// Setup initial list ordinal value
PRInt32 ordinal = 1;
nsIHTMLContent* hc;
if (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc)) {
nsHTMLValue value;
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetAttribute(nsHTMLAtoms::start, value)) {
if (eHTMLUnit_Integer == value.GetUnit()) {
ordinal = value.GetIntValue();
if (ordinal <= 0) {
ordinal = 1;
}
}
}
NS_RELEASE(hc);
}
aState.mNextListOrdinal = ordinal;
// Get to first-in-flow
nsBlockFrame* block = this;
while (nsnull != block->mPrevInFlow) {
block = (nsBlockFrame*) block->mPrevInFlow;
}
// For each flow-block...
while (nsnull != block) {
// For each frame in the flow-block...
nsIFrame* frame = block->mLines ? block->mLines->mFirstChild : nsnull;
while (nsnull != frame) {
// 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;
frame->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 foriegn has crept in.
nsBlockFrame* listItem;
if (NS_OK == frame->QueryInterface(kBlockFrameCID,
(void**) &listItem)) {
if (nsnull != listItem->mBullet) {
listItem->mBullet->SetListItemOrdinal(aState);
}
}
}
frame->GetNextSibling(frame);
}
block = (nsBlockFrame*) block->mNextInFlow;
}
}
void
nsBlockFrame::ComputeFinalSize(nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
// Compute final width
PRIntn ss = aState.mStyleSizeFlags;
if (NS_SIZE_HAS_WIDTH & ss) {
// Use style defined width
aMetrics.width = aState.mBorderPadding.left +
aState.mStyleSize.width + aState.mBorderPadding.right;
}
else {
// There are two options here. We either shrink wrap around our
// contents or we fluff out to the maximum available width. Note:
// We always shrink wrap when given an unconstrained width.
nscoord contentWidth = aState.mKidXMost + aState.mBorderPadding.right;
if ((0 == (NS_BODY_SHRINK_WRAP & mFlags)) && !aState.mUnconstrainedWidth) {
// Fluff out to the max width if we aren't already that wide
if (contentWidth < aState.maxSize.width) {
contentWidth = aState.maxSize.width;
}
}
aMetrics.width = contentWidth;
}
// Compute final height
if (NS_SIZE_HAS_HEIGHT & ss) {
// Use style defined height
aMetrics.height = aState.mBorderPadding.top +
aState.mStyleSize.height + aState.mBorderPadding.bottom;
}
else {
// Shrink wrap our height around our contents.
if (aState.mIsMarginRoot) {
// When we are a margin root make sure that our last childs
// bottom margin is fully applied.
if ((NS_BODY_NO_AUTO_MARGINS & mFlags) &&
(NS_CARRIED_BOTTOM_MARGIN_IS_AUTO & aState.mPrevMarginFlags)) {
// Do not apply last auto margin when the last childs margin
// is auto and we are configured to ignore them.
}
else {
aState.mY += aState.mPrevBottomMargin;
}
}
aState.mY += aState.mBorderPadding.bottom;
aMetrics.height = aState.mY;
}
// Return top and bottom margin information
if (aState.mIsMarginRoot) {
aMetrics.mCarriedOutTopMargin = 0;
aMetrics.mCarriedOutBottomMargin = 0;
aMetrics.mCarriedOutMarginFlags = 0;
}
else {
aMetrics.mCarriedOutTopMargin = aState.mCollapsedTopMargin;
aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
aMetrics.mCarriedOutMarginFlags = aState.mCarriedOutMarginFlags;
if (NS_CARRIED_BOTTOM_MARGIN_IS_AUTO & aState.mPrevMarginFlags) {
aMetrics.mCarriedOutMarginFlags |= NS_CARRIED_BOTTOM_MARGIN_IS_AUTO;
}
}
// Special check for zero sized content: If our content is zero
// sized then we collapse into nothingness.
if ((NS_SIZE_HAS_BOTH != ss) &&
((0 == aState.mKidXMost - aState.mBorderPadding.left) ||
(0 == aState.mY - aState.mBorderPadding.top))) {
aMetrics.width = 0;
aMetrics.height = 0;
}
aMetrics.ascent = aMetrics.height;
aMetrics.descent = 0;
// XXX this needs reworking I suppose
if (aState.mComputeMaxElementSize) {
*aMetrics.maxElementSize = aState.mMaxElementSize;
// Add in our border and padding to the max-element-size so that
// we don't shrink too far.
aMetrics.maxElementSize->width += aState.mBorderPadding.left +
aState.mBorderPadding.right;
aMetrics.maxElementSize->height += aState.mBorderPadding.top +
aState.mBorderPadding.bottom;
// Factor in any left and right floaters as well
LineData* line = mLines;
PRInt32 maxLeft = 0, maxRight = 0;
while (nsnull != line) {
if (nsnull != line->mFloaters) {
nsRect r;
nsMargin floaterMargin;
PRInt32 leftSum = 0, rightSum = 0;
PRInt32 n = line->mFloaters->Count();
for (PRInt32 i = 0; i < n; i++) {
nsPlaceholderFrame* placeholder = (nsPlaceholderFrame*)
line->mFloaters->ElementAt(i);
nsIFrame* floater = placeholder->GetAnchoredItem();
floater->GetRect(r);
const nsStyleDisplay* floaterDisplay;
const nsStyleSpacing* floaterSpacing;
floater->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)floaterDisplay);
floater->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&)floaterSpacing);
floaterSpacing->CalcMarginFor(floater, floaterMargin);
nscoord width = r.width + floaterMargin.left + floaterMargin.right;
switch (floaterDisplay->mFloats) {
default:
NS_NOTYETIMPLEMENTED("Unsupported floater type");
// FALL THROUGH
case NS_STYLE_FLOAT_LEFT:
leftSum += width;
break;
case NS_STYLE_FLOAT_RIGHT:
rightSum += width;
break;
}
}
if (leftSum > maxLeft) maxLeft = leftSum;
if (rightSum > maxRight) maxRight = rightSum;
}
line = line->mNext;
}
// XXX what to do???
if (maxLeft > aMetrics.maxElementSize->width) {
aMetrics.maxElementSize->width = maxLeft;
}
if (maxRight > aMetrics.maxElementSize->width) {
aMetrics.maxElementSize->width = maxRight;
}
}
}
nsresult
nsBlockFrame::AppendNewFrames(nsIPresContext& aPresContext,
nsIFrame* aNewFrame)
{
// Get our last line and then get its last child
nsIFrame* lastFrame;
LineData* lastLine = LastLine(mLines);
if (nsnull != lastLine) {
lastFrame = lastLine->LastChild();
} else {
lastFrame = nsnull;
}
// Add the new frames to the sibling list; wrap any frames that
// require wrapping
if (nsnull != lastFrame) {
lastFrame->SetNextSibling(aNewFrame);
}
nsresult rv;
// Make sure that new inlines go onto the end of the lastLine when
// the lastLine is mapping inline frames.
PRInt32 pendingInlines = 0;
if (nsnull != lastLine) {
if (!lastLine->IsBlock()) {
pendingInlines = 1;
}
}
// Now create some lines for the new frames
nsIFrame* prevFrame = lastFrame;
for (nsIFrame* frame = aNewFrame; nsnull != frame; frame->GetNextSibling(frame)) {
// See if the child is a block or non-block
const nsStyleDisplay* kidDisplay;
rv = frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) kidDisplay);
if (NS_OK != rv) {
return rv;
}
const nsStylePosition* kidPosition;
rv = frame->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&) kidPosition);
if (NS_OK != rv) {
return rv;
}
PRBool isBlock =
nsLineLayout::TreatFrameAsBlock(kidDisplay, kidPosition);
// See if we need to move the frame outside of the flow, and insert a
// placeholder frame in its place
nsIFrame* placeholder;
if (MoveFrameOutOfFlow(aPresContext, frame, kidDisplay, kidPosition, placeholder)) {
// Reset the previous frame's next sibling pointer
if (nsnull != prevFrame) {
prevFrame->SetNextSibling(placeholder);
}
// The placeholder frame is always inline
frame = placeholder;
isBlock = PR_FALSE;
}
// If the child is an inline then add it to the lastLine (if it's
// an inline line, otherwise make a new line). If the child is a
// block then make a new line and put the child in that line.
if (isBlock) {
// If the previous line has pending inline data to be reflowed,
// do so now.
if (0 != pendingInlines) {
// Set this to true in case we don't end up reflowing all of the
// frames on the line (because they end up being pushed).
lastLine->SetLastContentIsComplete();
lastLine->MarkDirty();
pendingInlines = 0;
}
// Create a line for the block
LineData* line = new LineData(frame, 1,
(LINE_IS_BLOCK |
LINE_LAST_CONTENT_IS_COMPLETE));
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (nsnull == lastLine) {
mLines = line;
}
else {
lastLine->mNext = line;
}
lastLine = line;
}
else {
// Queue up the inlines for reflow later on
if (0 == pendingInlines) {
LineData* line = new LineData(frame, 0, 0);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (nsnull == lastLine) {
mLines = line;
}
else {
lastLine->mNext = line;
}
lastLine = line;
}
lastLine->mChildCount++;
pendingInlines++;
}
// Remember the previous frame
prevFrame = frame;
// XXX CONSTRUCTION This needs to go somewhere...
#if 0
if (NS_OK == rv) {
// Wrap the frame in a view if necessary
rv = CreateViewForFrame(aPresContext, kidFrame, kidSC, PR_FALSE);
}
#endif
}
if (0 != pendingInlines) {
// Set this to true in case we don't end up reflowing all of the
// frames on the line (because they end up being pushed).
lastLine->SetLastContentIsComplete();
lastLine->MarkDirty();
}
return NS_OK;
}
nsresult
nsBlockFrame::InitialReflow(nsBlockReflowState& aState)
{
// Generate text-run information
nsresult rv = FindTextRuns(aState);
if (NS_OK != rv) {
return rv;
}
// Reflow everything
aState.GetAvailableSpace();
return ResizeReflow(aState);
}
void
nsBlockFrame::RecoverLineMargins(nsBlockReflowState& aState,
LineData* aLine,
nscoord& aTopMarginResult,
nscoord& aBottomMarginResult)
{
nscoord childsCarriedOutTopMargin = aLine->mCarriedOutTopMargin;
nscoord childsCarriedOutBottomMargin = aLine->mCarriedOutBottomMargin;
nscoord childsTopMargin = 0;
nscoord childsBottomMargin = 0;
if (aLine->IsBlock()) {
// Recover the block frames computed bottom margin value
nsIFrame* frame = aLine->mFirstChild;
if (nsnull != frame) {
const nsStyleSpacing* spacing;
frame->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&) spacing);
if (nsnull != spacing) {
nsMargin margin;
nsInlineReflow::CalculateBlockMarginsFor(aState.mPresContext, frame,
spacing, margin);
childsTopMargin = margin.top;
childsBottomMargin = margin.bottom;
}
}
}
// Collapse the carried-out-margins with the childs margins
aBottomMarginResult =
nsInlineReflow::MaxMargin(childsCarriedOutBottomMargin, childsBottomMargin);
aTopMarginResult =
nsInlineReflow::MaxMargin(childsCarriedOutTopMargin, childsTopMargin);
}
nsresult
nsBlockFrame::FrameAppendedReflow(nsBlockReflowState& aState)
{
nsresult rv = NS_OK;
// Get the first of the newly appended frames
nsIFrame* firstAppendedFrame;
aState.reflowCommand->GetChildFrame(firstAppendedFrame);
// Add the new frames to the child list, and create new lines. Each
// impacted line will be marked dirty
AppendNewFrames(aState.mPresContext, firstAppendedFrame);
// Generate text-run information
rv = FindTextRuns(aState);
if (NS_OK != rv) {
return rv;
}
// Recover our reflow state
LineData* firstDirtyLine = mLines;
LineData* lastCleanLine = nsnull;
while (nsnull != firstDirtyLine) {
if (firstDirtyLine->IsDirty()) {
break;
}
// Recover xmost
nscoord xmost = firstDirtyLine->mBounds.XMost();
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
// Recover the mPrevBottomMargin and the mCollapsedTopMargin values
nscoord topMargin, bottomMargin;
RecoverLineMargins(aState, firstDirtyLine, topMargin, bottomMargin);
if (0 == firstDirtyLine->mBounds.height) {
// For zero height lines, collapse the lines top and bottom
// margins together to produce the effective bottomMargin value.
bottomMargin = nsInlineReflow::MaxMargin(topMargin, bottomMargin);
bottomMargin = nsInlineReflow::MaxMargin(aState.mPrevBottomMargin,
bottomMargin);
}
else {
aState.mPrevMarginFlags = firstDirtyLine->GetMarginFlags();
}
aState.mPrevBottomMargin = bottomMargin;
// Advance Y to be below the line.
aState.mY = firstDirtyLine->mBounds.YMost();
// Advance to the next line
lastCleanLine = firstDirtyLine;
firstDirtyLine = firstDirtyLine->mNext;
}
if (nsnull != lastCleanLine) {
// Place any floaters the line has
if (nsnull != lastCleanLine->mFloaters) {
aState.mCurrentLine = lastCleanLine;
aState.PlaceFloaters(lastCleanLine->mFloaters);
}
}
aState.GetAvailableSpace();
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockReflowState::FrameAppendedReflow: y=%d firstDirtyLine=%p",
aState.mY, firstDirtyLine));
// Reflow lines from there forward
aState.mPrevLine = lastCleanLine;
return ReflowLinesAt(aState, firstDirtyLine);
}
// XXX keep the text-run data in the first-in-flow of the block
nsresult
nsBlockFrame::FindTextRuns(nsBlockReflowState& aState)
{
// Destroy old run information first
nsTextRun::DeleteTextRuns(mTextRuns);
mTextRuns = nsnull;
aState.mLineLayout.ResetTextRuns();
// Ask each child that implements nsIInlineReflow to find its text runs
LineData* line = mLines;
while (nsnull != line) {
if (!line->IsBlock()) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->mChildCount;
while (--n >= 0) {
nsIHTMLReflow* hr;
if (NS_OK == frame->QueryInterface(kIHTMLReflowIID, (void**)&hr)) {
nsresult rv = hr->FindTextRuns(aState.mLineLayout);
if (NS_OK != rv) {
return rv;
}
}
else {
// A frame that doesn't implement nsIHTMLReflow isn't text
// therefore it will end an open text run.
aState.mLineLayout.EndTextRun();
}
frame->GetNextSibling(frame);
}
}
else {
// A frame that doesn't implement nsIInlineReflow isn't text
// therefore it will end an open text run.
aState.mLineLayout.EndTextRun();
}
line = line->mNext;
}
aState.mLineLayout.EndTextRun();
// Now take the text-runs away from the line layout engine.
mTextRuns = aState.mLineLayout.TakeTextRuns();
return NS_OK;
}
nsresult
nsBlockFrame::FrameInsertedReflow(nsBlockReflowState& aState)
{
// Get the inserted frame
nsIFrame* newFrame;
aState.reflowCommand->GetChildFrame(newFrame);
// Get the previous sibling frame
nsIFrame* prevSibling;
aState.reflowCommand->GetPrevSiblingFrame(prevSibling);
// Insert the frame. This marks the line dirty...
InsertNewFrame(aState.mPresContext, this, newFrame, prevSibling);
LineData* line = mLines;
while (nsnull != line->mNext) {
if (line->IsDirty()) {
break;
}
line = line->mNext;
}
NS_ASSERTION(nsnull != line, "bad inserted reflow");
//XXX return ReflowDirtyLines(aState, line);
// XXX Correct implementation: reflow the dirty lines only; all
// other lines can be moved; recover state before first dirty line.
// XXX temporary
aState.GetAvailableSpace();
aState.mPrevLine = nsnull;
return ReflowLinesAt(aState, mLines);
}
nsresult
nsBlockFrame::FrameRemovedReflow(nsBlockReflowState& aState)
{
if (nsnull == mLines) {
return NS_OK;
}
// Get the deleted frame
nsIFrame* deletedFrame;
aState.reflowCommand->GetChildFrame(deletedFrame);
// Find the previous sibling frame
nsIFrame* prevSibling = nsnull;
for (nsIFrame* f = mLines->mFirstChild; f != deletedFrame; f->GetNextSibling(f)) {
if (nsnull == f) {
// We didn't find the deleted frame in our child list
NS_WARNING("Can't find deleted frame");
return NS_OK;
}
prevSibling = f;
}
// Find the line that contains deletedFrame; we also find the pointer to
// the line.
nsBlockFrame* flow = this;
LineData** linep = &flow->mLines;
LineData* line = flow->mLines;
while (nsnull != line) {
if (line->Contains(deletedFrame)) {
break;
}
linep = &line->mNext;
line = line->mNext;
}
// Remove frame and its continuations
while (nsnull != deletedFrame) {
while ((nsnull != line) && (nsnull != deletedFrame)) {
#ifdef NS_DEBUG
nsIFrame* parent;
deletedFrame->GetGeometricParent(parent);
NS_ASSERTION(flow == parent, "messed up delete code");
#endif
NS_FRAME_TRACE(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockFrame::ContentDeleted: deadFrame=%p", deletedFrame));
// Remove deletedFrame from the line
if (line->mFirstChild == deletedFrame) {
nsIFrame* nextFrame;
deletedFrame->GetNextSibling(nextFrame);
line->mFirstChild = nextFrame;
}
else {
nsIFrame* lastFrame = line->LastChild();
if (lastFrame == deletedFrame) {
line->SetLastContentIsComplete();
}
}
// Take deletedFrame out of the sibling list
if (nsnull != prevSibling) {
nsIFrame* nextFrame;
deletedFrame->GetNextSibling(nextFrame);
prevSibling->SetNextSibling(nextFrame);
}
// Destroy frame; capture its next-in-flow first in case we need
// to destroy that too.
nsIFrame* nextInFlow;
deletedFrame->GetNextInFlow(nextInFlow);
if (nsnull != nextInFlow) {
deletedFrame->BreakFromNextFlow();
}
deletedFrame->DeleteFrame(aState.mPresContext);
deletedFrame = nextInFlow;
// If line is empty, remove it now
LineData* next = line->mNext;
if (0 == --line->mChildCount) {
*linep = next;
line->mNext = nsnull;
delete line;
}
else {
linep = &line->mNext;
}
line = next;
}
// Advance to next flow block if the frame has more continuations
if (nsnull != deletedFrame) {
flow = (nsBlockFrame*) flow->mNextInFlow;
NS_ASSERTION(nsnull != flow, "whoops, continuation without a parent");
line = flow->mLines;
prevSibling = nsnull;
}
}
// Find the first dirty line. That's where we start to reflow
line = mLines;
while (nsnull != line->mNext) {
if (line->IsDirty()) {
break;
}
line = line->mNext;
}
NS_ASSERTION(nsnull != line, "bad inserted reflow");
//XXX return ReflowDirtyLines(aState, line);
// XXX Correct implementation: reflow the dirty lines only; all
// other lines can be moved; recover state before first dirty line.
// XXX temporary
aState.GetAvailableSpace();
aState.mPrevLine = nsnull;
return ReflowLinesAt(aState, mLines);
}
// XXX Todo: some incremental reflows are passing through this block
// and into a child block; those cannot impact our text-runs. In that
// case skip the FindTextRuns work.
// XXX easy optimizations: find the line that contains the next child
// in the reflow-command path and mark it dirty and only reflow it;
// recover state before it, slide lines down after it.
nsresult
nsBlockFrame::ChildIncrementalReflow(nsBlockReflowState& aState)
{
#if 0
// Generate text-run information; this will also "fluff out" any
// inline children's frame tree.
nsresult rv = FindTextRuns(aState);
if (NS_OK != rv) {
return rv;
}
#endif
// XXX temporary
aState.GetAvailableSpace();
aState.mPrevLine = nsnull;
return ReflowLinesAt(aState, mLines);
}
nsresult
nsBlockFrame::StyleChangedReflow(nsBlockReflowState& aState)
{
// XXX temporary
aState.GetAvailableSpace();
aState.mPrevLine = nsnull;
return ReflowLinesAt(aState, mLines);
}
nsresult
nsBlockFrame::ResizeReflow(nsBlockReflowState& aState)
{
// Mark everything dirty
LineData* line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
// Reflow all of our lines
aState.GetAvailableSpace();
aState.mPrevLine = nsnull;
return ReflowLinesAt(aState, mLines);
}
nsresult
nsBlockFrame::ReflowLinesAt(nsBlockReflowState& aState, LineData* aLine)
{
// Reflow the lines that are already ours
while (nsnull != aLine) {
nsReflowStatus rs;
if (!ReflowLine(aState, aLine, rs)) {
if (NS_IS_REFLOW_ERROR(rs)) {
return nsresult(rs);
}
return NS_FRAME_NOT_COMPLETE;
}
aState.mLineLayout.NextLine();
aState.mPrevLine = aLine;
aLine = aLine->mNext;
}
// Pull data from a next-in-flow if we can
while (nsnull != aState.mNextInFlow) {
// Grab first line from our next-in-flow
aLine = aState.mNextInFlow->mLines;
if (nsnull == aLine) {
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 = aLine->mNext;
aLine->mNext = nsnull;
if (0 == aLine->mChildCount) {
// The line is empty. Try the next one.
NS_ASSERTION(nsnull == aLine->mChildCount, "bad empty line");
aLine->mNext = aState.mFreeList;
aState.mFreeList = aLine;
continue;
}
// Make the children in the line ours.
nsIFrame* frame = aLine->mFirstChild;
nsIFrame* lastFrame = nsnull;
PRInt32 n = aLine->mChildCount;
while (--n >= 0) {
nsIFrame* geometricParent;
nsIFrame* contentParent;
frame->GetGeometricParent(geometricParent);
frame->GetContentParent(contentParent);
if (contentParent == geometricParent) {
frame->SetContentParent(this);
}
frame->SetGeometricParent(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 = aLine;
}
else {
NS_ASSERTION(nsnull == aState.mPrevLine->mNext, "bad aState.mPrevLine");
aState.mPrevLine->mNext = aLine;
aState.mPrevChild->SetNextSibling(aLine->mFirstChild);
}
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
VerifyChildCount(mLines);
}
#endif
// Now reflow it and any lines that it makes during it's reflow.
while (nsnull != aLine) {
nsReflowStatus rs;
if (!ReflowLine(aState, aLine, rs)) {
if (NS_IS_REFLOW_ERROR(rs)) {
return nsresult(rs);
}
return NS_FRAME_NOT_COMPLETE;
}
aState.mLineLayout.NextLine();
aState.mPrevLine = aLine;
aLine = aLine->mNext;
}
}
return NS_FRAME_COMPLETE;
}
/**
* Reflow a line. The line will either contain a single block frame
* or contain 1 or more inline frames.
*/
PRBool
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
LineData* aLine,
nsReflowStatus& aReflowResult)
{
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::ReflowLine: line=%p", aLine));
// Setup the line-layout for the new line
aState.mLineLayout.Reset();
aState.mCurrentLine = aLine;
aState.mInlineReflowPrepared = PR_FALSE;
// XXX temporary SLOW code
if (nsnull != aLine->mFloaters) {
delete aLine->mFloaters;
aLine->mFloaters = nsnull;
}
aLine->ClearDirty();
aLine->SetNeedDidReflow();
// Reflow mapped frames in the line
nsBlockFrame* nextInFlow;
PRBool keepGoing = PR_FALSE;
PRInt32 n = aLine->mChildCount;
if (0 != n) {
nsIFrame* frame = aLine->mFirstChild;
#ifdef NS_DEBUG
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
const nsStylePosition* position;
frame->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&) position);
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(display, position);
NS_ASSERTION(isBlock == aLine->IsBlock(), "bad line isBlock");
#endif
if (aLine->IsBlock()) {
keepGoing = ReflowBlockFrame(aState, aLine, frame, aReflowResult);
return keepGoing;
}
else {
while (--n >= 0) {
keepGoing = ReflowInlineFrame(aState, aLine, frame, aReflowResult);
if (!keepGoing) {
// It is possible that one or more of next lines are empty
// (because of DeleteNextInFlowsFor). If so, delete them now
// in case we are finished.
LineData* nextLine = aLine->mNext;
while ((nsnull != nextLine) && (0 == nextLine->mChildCount)) {
// Discard empty lines immediately. Empty lines can happen
// here because of DeleteNextInFlowsFor not being able to
// delete lines.
aLine->mNext = nextLine->mNext;
NS_ASSERTION(nsnull == nextLine->mFirstChild, "bad empty line");
nextLine->mNext = aState.mFreeList;
aState.mFreeList = nextLine;
nextLine = aLine->mNext;
}
goto done;
}
frame->GetNextSibling(frame);
}
}
}
// Pull frames from the next line until we can't
while (nsnull != aLine->mNext) {
keepGoing = PullFrame(aState, aLine, &aLine->mNext,
PR_FALSE, aReflowResult);
if (!keepGoing) {
goto done;
}
}
// Pull frames from the next-in-flow(s) until we can't
nextInFlow = aState.mNextInFlow;
while (nsnull != nextInFlow) {
LineData* line = nextInFlow->mLines;
if (nsnull == line) {
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
aState.mNextInFlow = nextInFlow;
continue;
}
keepGoing = PullFrame(aState, aLine, &nextInFlow->mLines,
PR_TRUE, aReflowResult);
if (!keepGoing) {
goto done;
}
}
keepGoing = PR_TRUE;
done:;
if (!aLine->IsBlock()) {
return PlaceLine(aState, aLine, aReflowResult);
}
return keepGoing;
}
// block's vs. inlines's:
// 1. break-before/break-after (is handled by nsInlineReflow)
// 2. pull-up: can't pull a block onto a non-empty line
// 3. blocks require vertical margin handling
// 4. left/right margins have to be figured differently for blocks
// Assume that container is aware of block/inline differences of the
// child frame and handles them through different pathways OR that the
// nsInlineReflow does and reports back the different results
// Here is how we format B0[ I0[ I1[ text0 B1 text1] ] ]
// B0 reflows I0
// I0 formats I1
// I1 reflows text0
// I1 hits B1 and notices it can't be placed
// I1 pushes B1 to overflow list
// I1 returns not-complete
// I0 creates I1'
// I0 returns not-complete
// B0 creates I0'
// B0 flushes out line
// B0 creates new line
// B0 puts I0' on new line
// B0 reflows I0'
// I0' reflows I1'
// I1' reflows B1
// I1' returns not-complete
// I0' creates I1''
// I0' returns not-complete
// B0 creates I0''
// B0 flushes out line
// B0 creates new line
// B0 puts I0'' on new line
// B0 reflows I0''
// I0'' reflows I1''
// I1'' reflows text1
// I1'' returns complete
// I0'' returns complete
// B0 flushes out line
// B0 returns complete
// Here is how we format B0[ I0[ text0 I1[ B1 text1] ] ]
// This is harder; I1 doesn't have text0 before B1 to know that we
// have to stop reflowing I1 before reflowing B1; and worse yet, we
// only have to stop if I1 begins on the same line that contains text0
// (it might not depending on the size of text0 and the size given to
// I0 to reflow into).
// To solve this we need to know when we hit B1 whether or not a break
// is required. To answer this question we need to be able to walk
// backwards up the nsReflowState's and discover where B1 will
// actually end up. Can't use the X coordinate because of
// border/padding.
// Since B0 will define this what we do is put a counter into the
// nsLineLayout structure. As the reflow recurses down the tree we
// will bump the counter whenever a non-inline frame is seen and
// placed (one that has a non-zero area too). When I1 goes to place B1
// it will see that the count is 1 (because of text0) and know to
// return a "break-before" status (instead of a not-complete; we
// return not-complete if we have placed ANY children and break-before
// when we have placed NO children).
// XXX factor this some more so that nsInlineFrame can use it too.
// The post-reflow-success code that computes the final margin
// values and carries them forward, plus the code that factors in
// the max-element size.
// XXX inline frames need this too when they wrap up blocks, right??
// Otherwise blocks in inlines won't interact with floaters properly.
void
nsBlockFrame::PrepareInlineReflow(nsBlockReflowState& aState,
nsIFrame* aFrame,
PRBool aIsBlock)
{
// Setup initial coordinate system for reflowing the frame into
nscoord x, availWidth, availHeight;
// XXX KIPP I'm not sure what you want to do here...
if (aIsBlock) {
// XXX Child needs to apply OUR border-padding and IT's left
// margin and right margin! How should this be done?
x = aState.mBorderPadding.left;
if (aState.mUnconstrainedWidth) {
availWidth = NS_UNCONSTRAINEDSIZE;
}
else {
availWidth = aState.mContentArea.width;
}
if (aState.mUnconstrainedHeight) {
availHeight = NS_UNCONSTRAINEDSIZE;
}
else {
/* XXX get the height right! */
availHeight = aState.mContentArea.height - aState.mY;
}
}
else {
// If the child doesn't handle run-around then we give it the band
// adjusted data. The band aligned data doesn't have our
// border/padding applied to it so add that in.
x = aState.mCurrentBand.availSpace.x + aState.mBorderPadding.left;
availWidth = aState.mCurrentBand.availSpace.width;
if (aState.mUnconstrainedHeight) {
availHeight = NS_UNCONSTRAINEDSIZE;
}
else {
/* XXX get the height right! */
availHeight = aState.mCurrentBand.availSpace.height;
}
}
aState.mInlineReflow->Init(x, aState.mY, availWidth, availHeight);
aState.mInlineReflowPrepared = PR_TRUE;
}
#define HAVE_CARRIED_MARGIN 0x100
// XXX switch to two versions: inline vs. block?
PRUintn
nsBlockFrame::CalculateMargins(nsBlockReflowState& aState,
LineData* aLine,
PRBool aInlineContext,
nscoord& aTopMarginResult,
nscoord& aBottomMarginResult)
{
PRUintn result = 0;
nsInlineReflow& ir = *aState.mInlineReflow;
// First get the childs top and bottom margins. For inline
// situations the child frame(s) margins were applied during line
// layout, therefore we consider them zero here.
nscoord childsTopMargin, childsBottomMargin;
PRUintn marginFlags;
if (aInlineContext) {
childsTopMargin = 0;
childsBottomMargin = 0;
marginFlags = ir.GetCarriedOutMarginFlags();
}
else {
childsTopMargin = ir.GetTopMargin();
childsBottomMargin = ir.GetBottomMargin();
marginFlags = ir.GetMarginFlags();
}
// Get the carried margin values. Note that even in an inline
// situation there may be a carried margin (e.g. an inline frame
// contains a block frame and the block frame has top/bottom
// margins). While CSS doesn't specify what this means, we do to
// improve compatability with poorly formed HTML (and commonly used
// HTML).
nscoord childsCarriedOutTopMargin = ir.GetCarriedOutTopMargin();
nscoord childsCarriedOutBottomMargin = ir.GetCarriedOutBottomMargin();
if (childsCarriedOutTopMargin || childsCarriedOutBottomMargin) {
result |= HAVE_CARRIED_MARGIN;
}
// Compute the collapsed top margin value (this is a generational
// margin collapse not a sibling margin collapse).
nscoord collapsedTopMargin =
nsInlineReflow::MaxMargin(childsCarriedOutBottomMargin, childsTopMargin);
// Now perform sibling to sibling margin collapsing.
collapsedTopMargin = nsInlineReflow::MaxMargin(aState.mPrevBottomMargin,
collapsedTopMargin);
PRBool topMarginIsAuto = PR_FALSE;
if (NS_CARRIED_TOP_MARGIN_IS_AUTO & marginFlags) {
if (aInlineContext) {
topMarginIsAuto = collapsedTopMargin == childsCarriedOutTopMargin;
}
else {
topMarginIsAuto = collapsedTopMargin == childsTopMargin;
}
}
// Compute the collapsed bottom margin value (this is a generational
// margin collapse not a sibling margin collapse).
nscoord collapsedBottomMargin =
nsInlineReflow::MaxMargin(childsCarriedOutBottomMargin,
childsBottomMargin);
if (NS_CARRIED_BOTTOM_MARGIN_IS_AUTO & marginFlags) {
if (aInlineContext) {
if (collapsedBottomMargin == childsCarriedOutBottomMargin) {
result |= NS_CARRIED_BOTTOM_MARGIN_IS_AUTO;
}
}
else if (collapsedBottomMargin == childsBottomMargin) {
result |= NS_CARRIED_BOTTOM_MARGIN_IS_AUTO;
}
}
// Now that we have the collapsed margin values, address any special
// situations that limit or change how the margins are applied.
if (0 == aLine->mBounds.height) {
// When a line is empty, we collapse its top and bottom margins to
// a single bottom margin value.
// XXX This is not obviously a part of the css2 box model.
collapsedBottomMargin =
nsInlineReflow::MaxMargin(collapsedTopMargin, collapsedBottomMargin);
collapsedTopMargin = 0;
}
else {
PRBool isTopLine = (aState.mY == aState.mBorderPadding.top);
if (isTopLine) {
if (!aState.mIsMarginRoot) {
// We are not a root for margin collapsing and this is our first
// non-empty-line (with a block child).
if (topMarginIsAuto) {
// Propogate auto-margin flag outward
aState.mCarriedOutMarginFlags |= NS_CARRIED_TOP_MARGIN_IS_AUTO;
result |= NS_CARRIED_TOP_MARGIN_IS_AUTO;
}
// Keep the collapsed margin value around to pass out to our
// parent. We don't apply its top margin (our parent will) so
// zero it out.
aState.mCollapsedTopMargin = collapsedTopMargin;
collapsedTopMargin = 0;
}
else if (topMarginIsAuto && (NS_BODY_NO_AUTO_MARGINS & mFlags)) {
// Our top margin is an auto margin and we are supposed to
// ignore them. Change it to zero.
collapsedTopMargin = 0;
}
}
}
aTopMarginResult = collapsedTopMargin;
aBottomMarginResult = collapsedBottomMargin;
return result;
}
void
nsBlockFrame::SlideFrames(LineData* aLine, nscoord aDY)
{
// Adjust the Y coordinate of the frames in the line
nsIFrame* kid = aLine->mFirstChild;
PRIntn n = aLine->mChildCount;
while (--n >= 0) {
nsRect r;
kid->GetRect(r);
r.y += aDY;
kid->SetRect(r);
kid->GetNextSibling(kid);
}
// Slide line box too
aLine->mBounds.y += aDY;
}
PRBool
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
nsReflowStatus& aReflowResult)
{
NS_PRECONDITION(0 == aState.mLineLayout.GetPlacedFrames(),
"non-empty line with a block");
nsInlineReflow& ir = *aState.mInlineReflow;
// Prepare the inline reflow engine
PRBool asBlock = PR_TRUE;
const nsStyleDisplay* display;
nsresult rv = aFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if ((NS_OK == rv) && (nsnull != display)) {
switch (display->mDisplay) {
case NS_STYLE_DISPLAY_TABLE:
asBlock = PR_FALSE;
break;
}
// clear floaters if the clear style is not none
if (NS_STYLE_CLEAR_NONE != display->mBreakType) {
aState.ClearFloaters(display->mBreakType);
}
}
PrepareInlineReflow(aState, aFrame, asBlock);
ir.SetIsFirstChild((aLine == mLines) &&
(aFrame == aLine->mFirstChild));
// Reflow the block frame
nsReflowStatus reflowStatus = ir.ReflowFrame(aFrame);
if (NS_IS_REFLOW_ERROR(reflowStatus)) {
aReflowResult = reflowStatus;
return PR_FALSE;
}
aReflowResult = reflowStatus;
if (NS_FRAME_IS_COMPLETE(reflowStatus)) {
aLine->SetLastContentIsComplete();
}
else {
aLine->ClearLastContentIsComplete();
}
// XXX We need to check the *type* of break and if it's a column/page
// break apply and cause the block to be split (assuming we are
// laying out in a column).
#if XXX
if (NS_INLINE_IS_BREAK(reflowStatus)) {
// XXX For now we ignore it
}
#endif
// Align the frame
ir.VerticalAlignFrames(aLine->mBounds);
ir.HorizontalAlignFrames(aLine->mBounds);
ir.RelativePositionFrames();
// Calculate margins
nscoord topMargin, bottomMargin;
PRUintn marginFlags = CalculateMargins(aState, aLine, PR_FALSE,
topMargin, bottomMargin);
// Try to place the frame
nscoord newY = aLine->mBounds.YMost() + topMargin;
if ((mLines != aLine) && (newY > aState.mBottomEdge)) {
// The frame doesn't fit inside our available space. Push the
// line to the next-in-flow and return our incomplete status to
// our parent.
PushLines(aState);
aReflowResult = NS_FRAME_NOT_COMPLETE;
return PR_FALSE;
}
aState.mY = newY;
// Apply collapsed top-margin value
if (0 != topMargin) {
SlideFrames(aLine, topMargin);
}
// Record bottom margin value for sibling to sibling compression or
// for returning as our carried out bottom margin. Adjust running
// margin value when either we have carried margins from the line or
// we have a non-zero height line.
if ((HAVE_CARRIED_MARGIN & marginFlags) || (0 != aLine->mBounds.height)) {
aState.mPrevBottomMargin = bottomMargin;
aState.mPrevMarginFlags = marginFlags;
}
aLine->mCarriedOutTopMargin = ir.GetCarriedOutTopMargin();
aLine->mCarriedOutBottomMargin = ir.GetCarriedOutBottomMargin();
aLine->SetMarginFlags(marginFlags);
nscoord xmost = aLine->mBounds.XMost();
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
// Update max-element-size
if (aState.mComputeMaxElementSize) {
const nsSize& kidMaxElementSize = ir.GetMaxElementSize();
if (kidMaxElementSize.width > aState.mMaxElementSize.width) {
aState.mMaxElementSize.width = kidMaxElementSize.width;
}
if (kidMaxElementSize.height > aState.mMaxElementSize.height) {
aState.mMaxElementSize.height = kidMaxElementSize.height;
}
}
aState.mPrevChild = aFrame;
// Refresh our available space in case a floater was placed by our
// child.
// XXX expensive!
aState.GetAvailableSpace();
if (NS_FRAME_IS_NOT_COMPLETE(reflowStatus)) {
// Some of the block fit. We need to have the block frame
// continued, so we make sure that it has a next-in-flow now.
nsIFrame* nextInFlow;
nsresult rv;
rv = nsHTMLContainerFrame::CreateNextInFlow(aState.mPresContext,
this,
aFrame,
nextInFlow);
if (NS_OK != rv) {
aReflowResult = rv;
return PR_FALSE;
}
if (nsnull != nextInFlow) {
// We made a next-in-flow for the block child frame. Create a
// line to map the block childs next-in-flow.
LineData* line = new LineData(nextInFlow, 1,
(LINE_IS_BLOCK |
LINE_LAST_CONTENT_IS_COMPLETE));
if (nsnull == line) {
aReflowResult = NS_ERROR_OUT_OF_MEMORY;
return PR_FALSE;
}
line->mNext = aLine->mNext;
aLine->mNext = line;
}
// Advance mPrevLine because we are keeping aLine (since some of
// the child block frame fit). Then push any remaining lines to
// our next-in-flow
aState.mPrevLine = aLine;
if (nsnull != aLine->mNext) {
PushLines(aState);
}
aReflowResult = NS_INLINE_LINE_BREAK_AFTER(reflowStatus);
return PR_FALSE;
}
return PR_TRUE;
}
/**
* Reflow an inline frame. Returns PR_FALSE if the frame won't fit
* on the line and the line should be flushed.
*/
PRBool
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
nsReflowStatus& aReflowResult)
{
nsresult rv;
nsIFrame* nextInFlow;
if (!aState.mInlineReflowPrepared) {
PrepareInlineReflow(aState, aFrame, PR_FALSE);
}
PRBool isFirstChild = (aLine == mLines) &&
(aFrame == aLine->mFirstChild);
aState.mInlineReflow->SetIsFirstChild(isFirstChild);
aReflowResult = aState.mInlineReflow->ReflowFrame(aFrame);
if (NS_IS_REFLOW_ERROR(aReflowResult)) {
return PR_FALSE;
}
PRBool lineWasComplete = aLine->GetLastContentIsComplete();
if (!NS_INLINE_IS_BREAK(aReflowResult)) {
aState.mPrevChild = aFrame;
if (NS_FRAME_IS_COMPLETE(aReflowResult)) {
aFrame->GetNextSibling(aFrame);
aLine->SetLastContentIsComplete();
return PR_TRUE;
}
// Create continuation frame (if necessary); add it to the end of
// the current line so that it can be pushed to the next line
// properly.
aLine->ClearLastContentIsComplete();
rv = nsHTMLContainerFrame::CreateNextInFlow(aState.mPresContext,
this, aFrame, nextInFlow);
if (NS_OK != rv) {
aReflowResult = rv;
return PR_FALSE;
}
if (nsnull != nextInFlow) {
// Add new child to the line
aLine->mChildCount++;
}
aFrame->GetNextSibling(aFrame);
}
else {
if (NS_INLINE_IS_BREAK_AFTER(aReflowResult)) {
aState.mPrevChild = aFrame;
if (NS_FRAME_IS_COMPLETE(aReflowResult)) {
aLine->SetLastContentIsComplete();
}
else {
// Create continuation frame (if necessary); add it to the end of
// the current line so that it can be pushed to the next line
// properly.
aLine->ClearLastContentIsComplete();
rv = nsHTMLContainerFrame::CreateNextInFlow(aState.mPresContext,
this, aFrame,
nextInFlow);
if (NS_OK != rv) {
aReflowResult = rv;
return PR_FALSE;
}
if (nsnull != nextInFlow) {
// Add new child to the line
aLine->mChildCount++;
}
}
aFrame->GetNextSibling(aFrame);
}
else {
NS_ASSERTION(aLine->GetLastContentIsComplete(), "bad mState");
}
}
// Split line since we aren't going to keep going
rv = SplitLine(aState, aLine, aFrame, lineWasComplete);
if (NS_IS_REFLOW_ERROR(rv)) {
aReflowResult = rv;
}
return PR_FALSE;
}
// XXX alloc lines using free-list in aState
// XXX refactor this since the split NEVER has to deal with blocks
nsresult
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
LineData* aLine,
nsIFrame* aFrame,
PRBool aLineWasComplete)
{
PRInt32 pushCount = aLine->mChildCount -
aState.mInlineReflow->GetCurrentFrameNum();
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::SplitLine: pushing %d frames",
pushCount));
if (0 != pushCount) {
NS_ASSERTION(nsnull != aFrame, "whoops");
LineData* to = aLine->mNext;
if (nsnull != to) {
// Only push into the next line if it's empty; otherwise we can
// end up pushing a frame which is continued into the same frame
// as it's continuation. This causes all sorts of bad side
// effects so we don't allow it.
if (to->mChildCount != 0) {
LineData* insertedLine = new LineData(aFrame, pushCount, 0);
aLine->mNext = insertedLine;
insertedLine->mNext = to;
to = insertedLine;
} else {
to->mFirstChild = aFrame;
to->mChildCount += pushCount;
}
} else {
to = new LineData(aFrame, pushCount, 0);
aLine->mNext = to;
}
if (nsnull == to) {
return NS_ERROR_OUT_OF_MEMORY;
}
to->SetLastContentIsComplete(aLineWasComplete);
aLine->mChildCount -= pushCount;
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
aLine->Verify();
}
#endif
NS_ASSERTION(0 != aLine->mChildCount, "bad push");
}
return NS_OK;
}
PRBool
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
LineData* aLine,
LineData** aFromList,
PRBool aUpdateGeometricParent,
nsReflowStatus& aReflowResult)
{
LineData* fromLine = *aFromList;
NS_ASSERTION(nsnull != fromLine, "bad line to pull from");
if (0 == fromLine->mChildCount) {
// Discard empty lines immediately. Empty lines can happen here
// because of DeleteChildsNextInFlow not being able to delete
// lines.
*aFromList = fromLine->mNext;
NS_ASSERTION(nsnull == fromLine->mFirstChild, "bad empty line");
fromLine->mNext = aState.mFreeList;
aState.mFreeList = fromLine;
return PR_TRUE;
}
// If our line is not empty and the child in aFromLine is a block
// then we cannot pull up the frame into this line.
if ((0 != aLine->mChildCount) && fromLine->IsBlock()) {
aReflowResult = NS_INLINE_LINE_BREAK_BEFORE();
return PR_FALSE;
}
// Take frame from fromLine
nsIFrame* frame = fromLine->mFirstChild;
if (0 == aLine->mChildCount++) {
aLine->mFirstChild = frame;
aLine->SetIsBlock(fromLine->IsBlock());
#ifdef NS_DEBUG
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
const nsStylePosition* position;
frame->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&) position);
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(display, position);
NS_ASSERTION(isBlock == aLine->IsBlock(), "bad line isBlock");
#endif
}
if (0 != --fromLine->mChildCount) {
frame->GetNextSibling(fromLine->mFirstChild);
}
else {
// Free up the fromLine now that it's empty
*aFromList = fromLine->mNext;
fromLine->mFirstChild = nsnull;
fromLine->mNext = aState.mFreeList;
aState.mFreeList = fromLine;
}
// Change geometric parents
if (aUpdateGeometricParent) {
nsIFrame* geometricParent;
nsIFrame* contentParent;
frame->GetGeometricParent(geometricParent);
frame->GetContentParent(contentParent);
if (contentParent == geometricParent) {
frame->SetContentParent(this);
}
frame->SetGeometricParent(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);
}
// Reflow the frame
if (aLine->IsBlock()) {
return ReflowBlockFrame(aState, aLine, frame, aReflowResult);
}
else {
return ReflowInlineFrame(aState, aLine, frame, aReflowResult);
}
}
// XXX This is identical to the back end of the block reflow code, not
// counting the continuation of block frames part. Factor this!
PRBool
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
LineData* aLine,
nsReflowStatus aReflowStatus)
{
// Align the children. This also determines the actual height and
// width of the line.
nsInlineReflow& ir = *aState.mInlineReflow;
ir.VerticalAlignFrames(aLine->mBounds);
ir.HorizontalAlignFrames(aLine->mBounds);
ir.RelativePositionFrames();
// Calculate the bottom margin for the line.
nscoord lineBottomMargin = 0;
if (0 == aLine->mBounds.height) {
nsIFrame* brFrame = aState.mLineLayout.GetBRFrame();
if (nsnull != brFrame) {
// If a line ends in a BR and the line is empty of height then we
// make sure that the line ends up with some height anyway. Note
// that the height looks like vertical margin so that it can
// compress with other block margins.
nsIStyleContext* brSC;
nsIPresContext& px = aState.mPresContext;
nsresult rv = brFrame->GetStyleContext(&px, brSC);
if ((NS_OK == rv) && (nsnull != brSC)) {
const nsStyleFont* font = (const nsStyleFont*)
brSC->GetStyleData(eStyleStruct_Font);
nsIFontMetrics* fm = px.GetMetricsFor(font->mFont);
if (nsnull != fm) {
fm->GetHeight(lineBottomMargin);
NS_RELEASE(fm);
}
NS_RELEASE(brSC);
}
}
}
// Calculate the lines top and bottom margin values. The margin will
// come from an embedded block frame, not from inline frames.
nscoord topMargin, bottomMargin;
PRUintn marginFlags = CalculateMargins(aState, aLine, PR_TRUE,
topMargin, bottomMargin);
// See if the line fit. If it doesn't we need to push it. Our first
// line will always fit.
// XXX This is a good place to check and see if we have
// below-current-line floaters, and if we do make sure that they fit
// too.
// XXX don't forget to factor in the top/bottom margin when sharing
// this with the block code
nscoord newY = aLine->mBounds.YMost() + topMargin + lineBottomMargin;
NS_FRAME_TRACE(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockFrame::PlaceLine: newY=%d limit=%d lineHeight=%d",
newY, aState.mBottomEdge, aLine->mBounds.height));
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);
return PR_FALSE;
}
// Apply collapsed top-margin value
// XXX I bet the bullet placement just got broken by this code
if (0 != topMargin) {
SlideFrames(aLine, topMargin);
}
// Adjust running margin value when either we have carried margins
// from the line or we have a non-zero height line.
if ((HAVE_CARRIED_MARGIN & marginFlags) || (0 != aLine->mBounds.height)) {
aState.mPrevBottomMargin = bottomMargin;
aState.mPrevMarginFlags = marginFlags;
}
aLine->mCarriedOutTopMargin = ir.GetCarriedOutTopMargin();
aLine->mCarriedOutBottomMargin = ir.GetCarriedOutBottomMargin();
aLine->SetMarginFlags(marginFlags);
// Now that we know the line is staying put, put in the outside
// bullet if we have one.
if ((nsnull == mPrevInFlow) && (aLine == mLines) && (nsnull != mBullet)) {
const nsStyleList* list;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&)list);
if (NS_STYLE_LIST_STYLE_POSITION_OUTSIDE == list->mListStylePosition) {
// Reflow the bullet now
nsSize availSize;
availSize.width = NS_UNCONSTRAINEDSIZE;
availSize.height = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState reflowState(mBullet, aState, availSize, &aState.mLineLayout);
nsHTMLReflowMetrics metrics(nsnull);
nsIHTMLReflow* htmlReflow;
if (NS_OK == mBullet->QueryInterface(kIHTMLReflowIID, (void**) &htmlReflow)) {
nsReflowStatus status;
htmlReflow->WillReflow(aState.mPresContext);
htmlReflow->Reflow(aState.mPresContext, metrics, reflowState, status);
htmlReflow->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
}
// Place the bullet now
nsMargin padding;
aState.mStyleSpacing->CalcPaddingFor(this, padding);
nscoord x = aState.mBorderPadding.left - (padding.left/2) -
metrics.width;
// XXX This calculation is wrong, especially if
// vertical-alignment occurs on the line!
nscoord y = aState.mBorderPadding.top + ir.GetMaxAscent() -
metrics.ascent + topMargin;
mBullet->SetRect(nsRect(x, y, metrics.width, metrics.height));
}
}
// Update max-element-size
// Update max-element-size
if (aState.mComputeMaxElementSize) {
const nsSize& kidMaxElementSize = ir.GetMaxElementSize();
if (kidMaxElementSize.width > aState.mMaxElementSize.width) {
aState.mMaxElementSize.width = kidMaxElementSize.width;
}
if (kidMaxElementSize.height > aState.mMaxElementSize.height) {
aState.mMaxElementSize.height = kidMaxElementSize.height;
}
}
nscoord xmost = aLine->mBounds.XMost();
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
aState.mY = newY;
// Any below current line floaters to place?
if (0 != aState.mPendingFloaters.Count()) {
aState.PlaceFloaters(&aState.mPendingFloaters);
aState.mPendingFloaters.Clear();
// XXX Factor in the height of the floaters as well when considering
// whether the line fits.
// The default policy is that if there isn't room for the floaters then
// both the line and the floaters are pushed to the next-in-flow...
}
// Based on the last child we reflowed reflow status, we may need to
// clear past any floaters.
if (NS_INLINE_IS_BREAK_AFTER(aReflowStatus)) {
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(aReflowStatus);
// Apply break to the line
switch (breakType) {
default:
break;
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::PlaceLine: clearing floaters=%d",
breakType));
aState.ClearFloaters(breakType);
ListTag(stdout); printf(": clearing %x\n", breakType);
break;
}
// XXX page breaks, etc, need to be passed upwards too!
}
// Update available space after placing line in case below current
// line floaters were placed or in case we just used up the space in
// the current band and are ready to move into a new band.
aState.GetAvailableSpace();
return PR_TRUE;
}
static nsresult
FindFloatersIn(nsIFrame* aFrame, nsVoidArray*& aArray)
{
const nsStyleDisplay* display;
aFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_FLOAT_NONE != display->mFloats) {
if (nsnull == aArray) {
aArray = new nsVoidArray();
if (nsnull == aArray) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
aArray->AppendElement(aFrame);
}
if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
nsIFrame* kid;
aFrame->FirstChild(kid);
while (nsnull != kid) {
nsresult rv = FindFloatersIn(kid, aArray);
if (NS_OK != rv) {
return rv;
}
kid->GetNextSibling(kid);
}
}
return NS_OK;
}
void
nsBlockFrame::FindFloaters(LineData* aLine)
{
nsVoidArray* floaters = aLine->mFloaters;
if (nsnull != floaters) {
// Empty floater array before proceeding
floaters->Clear();
}
nsIFrame* frame = aLine->mFirstChild;
PRInt32 n = aLine->mChildCount;
while (--n >= 0) {
FindFloatersIn(frame, floaters);
frame->GetNextSibling(frame);
}
aLine->mFloaters = floaters;
// Get rid of floater array if we don't need it
if (nsnull != floaters) {
if (0 == floaters->Count()) {
delete floaters;
aLine->mFloaters = nsnull;
}
}
}
void
nsBlockFrame::PushLines(nsBlockReflowState& aState)
{
NS_ASSERTION(nsnull != aState.mPrevLine, "bad push");
LineData* lastLine = aState.mPrevLine;
LineData* nextLine = lastLine->mNext;
lastLine->mNext = nsnull;
mOverflowLines = nextLine;
// Break frame sibling list
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(nsnull);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::PushLines: line=%p prevInFlow=%p nextInFlow=%p",
mOverflowLines, mPrevInFlow, mNextInFlow));
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
VerifyChildCount(mLines);
VerifyChildCount(mOverflowLines, PR_TRUE);
}
#endif
}
PRBool
nsBlockFrame::DrainOverflowLines()
{
PRBool drained = PR_FALSE;
// First grab the prev-in-flows overflow lines
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
if (nsnull != prevBlock) {
LineData* line = prevBlock->mOverflowLines;
if (nsnull != line) {
drained = PR_TRUE;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DrainOverflowLines: line=%p prevInFlow=%p",
line, prevBlock));
prevBlock->mOverflowLines = nsnull;
// Make all the frames on the mOverflowLines list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = line->mFirstChild;
while (nsnull != frame) {
nsIFrame* geometricParent;
nsIFrame* contentParent;
frame->GetGeometricParent(geometricParent);
frame->GetContentParent(contentParent);
if (contentParent == geometricParent) {
frame->SetContentParent(this);
}
frame->SetGeometricParent(this);
lastFrame = frame;
frame->GetNextSibling(frame);
}
// Join the line lists
if (nsnull == mLines) {
mLines = line;
}
else {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines->mFirstChild);
// Place overflow lines at the front of our line list
LineData* lastLine = LastLine(line);
lastLine->mNext = mLines;
mLines = line;
}
}
}
// Now grab our own overflow lines
if (nsnull != mOverflowLines) {
// 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.
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DrainOverflowLines: from me, line=%p",
mOverflowLines));
LineData* lastLine = LastLine(mLines);
if (nsnull == lastLine) {
mLines = mOverflowLines;
}
else {
lastLine->mNext = mOverflowLines;
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(mOverflowLines->mFirstChild);
// Update our last-content-index now that we have a new last child
lastLine = LastLine(mOverflowLines);
}
mOverflowLines = nsnull;
drained = PR_TRUE;
}
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
VerifyChildCount(mLines, PR_TRUE);
}
#endif
return drained;
}
nsresult
nsBlockFrame::InsertNewFrame(nsIPresContext& aPresContext,
nsBlockFrame* aParentFrame,
nsIFrame* aNewFrame,
nsIFrame* aPrevSibling)
{
const nsStyleDisplay* display;
aNewFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
const nsStylePosition* position;
aNewFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&) position);
PRUint16 newFrameIsBlock = nsLineLayout::TreatFrameAsBlock(display, position)
? LINE_IS_BLOCK : 0;
// See if we need to move the frame outside of the flow, and insert a
// placeholder frame in its place
nsIFrame* placeholder;
if (MoveFrameOutOfFlow(aPresContext, aNewFrame, display, position, placeholder)) {
// Add the placeholder frame to the flow
aNewFrame = placeholder;
newFrameIsBlock = PR_FALSE; // placeholder frame is always inline
}
// Insert/append the frame into flows line list at the right spot
LineData* newLine;
LineData* line = aParentFrame->mLines;
if (nsnull == aPrevSibling) {
// Insert new frame into the sibling list
aNewFrame->SetNextSibling(line->mFirstChild);
if (line->IsBlock() || newFrameIsBlock) {
// Create a new line
newLine = new LineData(aNewFrame, 1, LINE_LAST_CONTENT_IS_COMPLETE |
newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = aParentFrame->mLines;
aParentFrame->mLines = newLine;
} else {
// Insert frame at the front of the line
line->mFirstChild = aNewFrame;
line->mChildCount++;
line->MarkDirty();
}
}
else {
// Find line containing the previous sibling to the new frame
line = FindLineContaining(line, aPrevSibling);
NS_ASSERTION(nsnull != line, "no line contains the previous sibling");
if (nsnull != line) {
if (line->IsBlock()) {
// Create a new line just after line
newLine = new LineData(aNewFrame, 1, LINE_LAST_CONTENT_IS_COMPLETE |
newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
else if (newFrameIsBlock) {
// Split line in two, if necessary. We can't allow a block to
// end up in an inline line.
if (line->IsLastChild(aPrevSibling)) {
// The new frame goes after prevSibling and prevSibling is
// the last frame on the line. Therefore we don't need to
// split the line, just create a new line.
newLine = new LineData(aNewFrame, 1, LINE_LAST_CONTENT_IS_COMPLETE |
newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
else {
// The new frame goes after prevSibling and prevSibling is
// somewhere in the line, but not at the end. Split the line
// just after prevSibling.
PRInt32 i, n = line->mChildCount;
nsIFrame* frame = line->mFirstChild;
for (i = 0; i < n; i++) {
if (frame == aPrevSibling) {
nsIFrame* nextSibling;
aPrevSibling->GetNextSibling(nextSibling);
// Create new line to hold the remaining frames
NS_ASSERTION(n - i - 1 > 0, "bad line count");
newLine = new LineData(nextSibling, n - i - 1,
line->mState & LINE_LAST_CONTENT_IS_COMPLETE);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
line->MarkDirty();
line->SetLastContentIsComplete();
line->mChildCount = i + 1;
break;
}
frame->GetNextSibling(frame);
}
// Now create a new line to hold the block
newLine = new LineData(aNewFrame, 1,
newFrameIsBlock | LINE_LAST_CONTENT_IS_COMPLETE);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
}
else {
// Insert frame into the line.
//XXX NS_ASSERTION(line->GetLastContentIsComplete(), "bad line LCIC");
line->mChildCount++;
line->MarkDirty();
}
}
// Insert new frame into the sibling list; note: this must be done
// after the above logic because the above logic depends on the
// sibling list being in the "before insertion" state.
nsIFrame* nextSibling;
aPrevSibling->GetNextSibling(nextSibling);
aNewFrame->SetNextSibling(nextSibling);
aPrevSibling->SetNextSibling(aNewFrame);
}
return NS_OK;
}
PRBool
nsBlockFrame::DeleteChildsNextInFlow(nsIPresContext& aPresContext,
nsIFrame* aChild)
{
NS_PRECONDITION(IsChild(aChild), "bad geometric parent");
nsIFrame* nextInFlow;
nsBlockFrame* parent;
aChild->GetNextInFlow(nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
nextInFlow->GetGeometricParent((nsIFrame*&)parent);
// If the next-in-flow has a next-in-flow then delete it, too (and
// delete it first).
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(nextNextInFlow);
if (nsnull != nextNextInFlow) {
parent->DeleteChildsNextInFlow(aPresContext, nextInFlow);
}
#ifdef NS_DEBUG
PRInt32 childCount;
nsIFrame* firstChild;
nextInFlow->FirstChild(firstChild);
childCount = LengthOf(firstChild);
NS_ASSERTION((0 == childCount) && (nsnull == firstChild),
"deleting !empty next-in-flow");
#endif
// Disconnect the next-in-flow from the flow list
nextInFlow->BreakFromPrevFlow();
// Remove nextInFlow from the parents line list. Also remove it from
// the sibling list.
if (RemoveChild(parent->mLines, nextInFlow)) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DeleteNextInFlowsFor: frame=%p (from mLines)",
nextInFlow));
goto done;
}
// If we get here then we didn't find the child on the line list. If
// it's not there then it has to be on the overflow lines list.
if (nsnull != mOverflowLines) {
if (RemoveChild(parent->mOverflowLines, nextInFlow)) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DeleteNextInFlowsFor: frame=%p (from overflow)",
nextInFlow));
goto done;
}
}
NS_NOTREACHED("can't find next-in-flow in overflow list");
done:;
// If the parent is us then we will finish reflowing and update the
// content offsets of our parents when we are a pseudo-frame; if the
// parent is not us then it's a next-in-flow which means it will get
// reflowed by our parent and fix its content offsets. So there.
// Delete the next-in-flow frame and adjust its parents child count
nextInFlow->DeleteFrame(aPresContext);
#ifdef NS_DEBUG
aChild->GetNextInFlow(nextInFlow);
NS_POSTCONDITION(nsnull == nextInFlow, "non null next-in-flow");
#endif
return PR_TRUE;
}
PRBool
nsBlockFrame::RemoveChild(LineData* aLines, nsIFrame* aChild)
{
LineData* line = aLines;
nsIFrame* prevChild = nsnull;
while (nsnull != line) {
nsIFrame* child = line->mFirstChild;
PRInt32 n = line->mChildCount;
while (--n >= 0) {
nsIFrame* nextChild;
child->GetNextSibling(nextChild);
if (child == aChild) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::RemoveChild: line=%p frame=%p",
line, aChild));
// Continuations HAVE to be at the start of a line
NS_ASSERTION(child == line->mFirstChild, "bad continuation");
line->mFirstChild = nextChild;
if (0 == --line->mChildCount) {
line->mFirstChild = nsnull;
}
if (nsnull != prevChild) {
// When nextInFlow and it's continuation are in the same
// container then we remove the nextInFlow from the sibling
// list.
prevChild->SetNextSibling(nextChild);
}
return PR_TRUE;
}
prevChild = child;
child = nextChild;
}
line = line->mNext;
}
return PR_FALSE;
}
////////////////////////////////////////////////////////////////////////
// Floater support
void
nsBlockFrame::ReflowFloater(nsIPresContext& aPresContext,
nsBlockReflowState& aState,
nsIFrame* aFloaterFrame)
{
// Prepare the reflow state for the floater frame. Note that initially
// it's maxSize will be 0,0 until we compute it (we need the reflowState
// for nsLayout::GetStyleSize so we have to do this first)
nsSize kidAvailSize(0, 0);
nsHTMLReflowState reflowState(aFloaterFrame, aState, kidAvailSize,
eReflowReason_Initial);
// Compute the available space for the floater. Use the default
// 'auto' width and height values
nsSize styleSize;
PRIntn styleSizeFlags =
nsCSSLayout::GetStyleSize(&aPresContext, reflowState, styleSize);
// XXX The width and height are for the content area only. Add in space for
// border and padding
if (styleSizeFlags & NS_SIZE_HAS_WIDTH) {
kidAvailSize.width = styleSize.width;
}
else {
// If we are floating something and we don't know the width then
// find a maximum width for it to reflow into.
// XXX if the child is a block (instead of a table, say) then this
// will do the wrong thing. A better choice would be
// NS_UNCONSTRAINEDSIZE, but that has special meaning to tables.
const nsReflowState* rsp = &aState;
kidAvailSize.width = 0;
while (nsnull != rsp) {
if ((0 != rsp->maxSize.width) &&
(NS_UNCONSTRAINEDSIZE != rsp->maxSize.width)) {
kidAvailSize.width = rsp->maxSize.width;
break;
}
rsp = rsp->parentReflowState;
}
NS_ASSERTION(0 != kidAvailSize.width, "no width for block found");
}
if (styleSizeFlags & NS_SIZE_HAS_HEIGHT) {
kidAvailSize.height = styleSize.height;
}
else {
kidAvailSize.height = NS_UNCONSTRAINEDSIZE;
}
reflowState.maxSize = kidAvailSize;
// Resize reflow the anchored item into the available space
// XXX Check for complete?
nsIHTMLReflow* floaterReflow;
if (NS_OK == aFloaterFrame->QueryInterface(kIHTMLReflowIID, (void**)&floaterReflow)) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
floaterReflow->WillReflow(aPresContext);
floaterReflow->Reflow(aPresContext, desiredSize, reflowState, status);
aFloaterFrame->SizeTo(desiredSize.width, desiredSize.height);
}
}
PRBool
nsBlockFrame::AddFloater(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsIFrame* aFloater,
nsPlaceholderFrame* aPlaceholder)
{
// Walk up reflow state chain, looking for ourself
const nsReflowState* rs = &aReflowState;
while (nsnull != rs) {
if (rs->frame == this) {
break;
}
rs = rs->parentReflowState;
}
if (nsnull == rs) {
// Never mind
return PR_FALSE;
}
nsBlockReflowState* state = (nsBlockReflowState*) rs;
// Get the frame associated with the space manager, and get its
// nsIAnchoredItems interface
nsIFrame* frame = state->mSpaceManager->GetFrame();
nsIAnchoredItems* anchoredItems = nsnull;
frame->QueryInterface(kIAnchoredItemsIID, (void**)&anchoredItems);
NS_ASSERTION(nsnull != anchoredItems, "no anchored items interface");
if (nsnull != anchoredItems) {
anchoredItems->AddAnchoredItem(aFloater,
nsIAnchoredItems::anHTMLFloater,
this);
// Reflow the floater (the first time we do it here; later on it's
// done during the reflow of the line that contains the floater)
ReflowFloater(*aPresContext, *state, aFloater);
return PR_TRUE;
}
return PR_FALSE;
}
// 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(nsPlaceholderFrame* aPlaceholder)
{
// Update the current line's floater array
NS_ASSERTION(nsnull != mCurrentLine, "null ptr");
if (nsnull == mCurrentLine->mFloaters) {
mCurrentLine->mFloaters = new nsVoidArray();
}
mCurrentLine->mFloaters->AppendElement(aPlaceholder);
// Now place the floater immediately if possible. Otherwise stash it
// away in mPendingFloaters and place it later.
if (IsLeftMostChild(aPlaceholder)) {
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::AddFloater: IsLeftMostChild, placeHolder=%p",
aPlaceholder));
// 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.
PRBool isLeftFloater;
nscoord ox, oy;
mSpaceManager->GetTranslation(ox, oy);
nscoord dx = ox - mSpaceManagerX;
nscoord dy = oy - mSpaceManagerY;
mSpaceManager->Translate(-dx, -dy);
PlaceFloater(aPlaceholder, isLeftFloater);
// Pass on updated available space to the current inline reflow engine
GetAvailableSpace();
mLineLayout.UpdateInlines(mCurrentBand.availSpace.x + mBorderPadding.left,
mY,
mCurrentBand.availSpace.width,
mCurrentBand.availSpace.height,
isLeftFloater);
// 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).
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::AddFloater: pending, placeHolder=%p",
aPlaceholder));
mPendingFloaters.AppendElement(aPlaceholder);
}
}
// XXX Inline frame layout and block layout need to be more
// coordinated; IsFirstChild in the inline code is doing much the same
// thing as below; firstness should be well known.
PRBool
nsBlockReflowState::IsLeftMostChild(nsIFrame* aFrame)
{
for (;;) {
nsIFrame* parent;
aFrame->GetGeometricParent(parent);
if (parent == mBlock) {
nsIFrame* child = mCurrentLine->mFirstChild;
PRInt32 n = mCurrentLine->mChildCount;
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(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;
}
void
nsBlockReflowState::PlaceFloater(nsPlaceholderFrame* aPlaceholder,
PRBool& aIsLeftFloater)
{
nsISpaceManager* sm = mSpaceManager;
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
// Remove floaters old placement from the space manager
sm->RemoveRegion(floater);
// Reflow the floater if it's targetted for a reflow
if (nsnull != reflowCommand) {
nsIFrame* target;
reflowCommand->GetTarget(target);
if (floater == target) {
mBlock->ReflowFloater(mPresContext, *this, floater);
}
}
// Get the band of available space
GetAvailableSpace();
// Get the type of floater
const nsStyleDisplay* floaterDisplay;
const nsStyleSpacing* floaterSpacing;
floater->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)floaterDisplay);
floater->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&)floaterSpacing);
// Get the floaters bounding box and margin information
nsRect region;
floater->GetRect(region);
nsMargin floaterMargin;
floaterSpacing->CalcMarginFor(floater, floaterMargin);
// Compute the size of the region that will impact the space
// manager. 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.
region.y = mY - mBorderPadding.top;
region.width += floaterMargin.left + floaterMargin.right;
region.height += floaterMargin.top + floaterMargin.bottom;
switch (floaterDisplay->mFloats) {
default:
NS_NOTYETIMPLEMENTED("Unsupported floater type");
// FALL THROUGH
case NS_STYLE_FLOAT_LEFT:
region.x = mCurrentBand.availSpace.x;
aIsLeftFloater = PR_TRUE;
break;
case NS_STYLE_FLOAT_RIGHT:
region.x = mCurrentBand.availSpace.XMost() - region.width;
if (region.x < 0) { // XXX do this?
region.x = 0;
}
aIsLeftFloater = PR_FALSE;
break;
}
// Factor in the floaters margins
sm->AddRectRegion(floater, region);
// 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.
floater->MoveTo(mSpaceManagerX + floaterMargin.left + region.x,
mSpaceManagerY + floaterMargin.top + region.y);
}
/**
* Place below-current-line floaters.
*/
void
nsBlockReflowState::PlaceFloaters(nsVoidArray* aFloaters)
{
NS_PRECONDITION(aFloaters->Count() > 0, "no floaters");
PRInt32 numFloaters = aFloaters->Count();
for (PRInt32 i = 0; i < numFloaters; i++) {
nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)
aFloaters->ElementAt(i);
if (IsLeftMostChild(placeholderFrame)) {
// Left-most children are placed during the line's reflow
continue;
}
PRBool isLeftFloater;
PlaceFloater(placeholderFrame, isLeftFloater);
}
// Update available spcae now that the floaters have been placed
GetAvailableSpace();
}
void
nsBlockReflowState::ClearFloaters(PRUint8 aBreakType)
{
// Update band information based on current mY before clearing
GetAvailableSpace();
for (;;) {
PRBool haveFloater = PR_FALSE;
// Find the Y coordinate to clear to. Note that the band trapezoid
// coordinates are relative to the our spacemanager translation
// (which means the band coordinates are inside the border+padding
// area of this block frame).
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: mY=%d trapCount=%d",
mY, mCurrentBand.count));
nscoord clearYMost = mY - mBorderPadding.top;
nsRect tmp;
PRInt32 i;
for (i = 0; i < mCurrentBand.count; i++) {
const nsStyleDisplay* display;
nsBandTrapezoid* trapezoid = &mCurrentBand.data[i];
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: trap=%d state=%d",
i, trapezoid->state));
if (nsBandTrapezoid::Available != trapezoid->state) {
haveFloater = PR_TRUE;
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
PRInt32 fn, numFrames = trapezoid->frames->Count();
NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
for (fn = 0; fn < numFrames; fn++) {
nsIFrame* frame = (nsIFrame*) trapezoid->frames->ElementAt(fn);
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: frame[%d]=%p floats=%d",
fn, frame, display->mFloats));
switch (display->mFloats) {
case NS_STYLE_FLOAT_LEFT:
if ((NS_STYLE_CLEAR_LEFT == aBreakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aBreakType)) {
trapezoid->GetRect(tmp);
nscoord ym = tmp.YMost();
if (ym > clearYMost) {
clearYMost = ym;
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: left clearYMost=%d",
clearYMost));
}
}
break;
case NS_STYLE_FLOAT_RIGHT:
if ((NS_STYLE_CLEAR_RIGHT == aBreakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aBreakType)) {
trapezoid->GetRect(tmp);
nscoord ym = tmp.YMost();
if (ym > clearYMost) {
clearYMost = ym;
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: right clearYMost=%d",
clearYMost));
}
}
break;
}
}
}
else {
trapezoid->frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: frame=%p floats=%d",
trapezoid->frame, display->mFloats));
switch (display->mFloats) {
case NS_STYLE_FLOAT_LEFT:
if ((NS_STYLE_CLEAR_LEFT == aBreakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aBreakType)) {
trapezoid->GetRect(tmp);
nscoord ym = tmp.YMost();
if (ym > clearYMost) {
clearYMost = ym;
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: left clearYMost=%d",
clearYMost));
}
}
break;
case NS_STYLE_FLOAT_RIGHT:
if ((NS_STYLE_CLEAR_RIGHT == aBreakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aBreakType)) {
trapezoid->GetRect(tmp);
nscoord ym = tmp.YMost();
if (ym > clearYMost) {
clearYMost = ym;
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: right clearYMost=%d",
clearYMost));
}
}
break;
}
}
}
}
if (!haveFloater) {
break;
}
if (clearYMost == mY - mBorderPadding.top) {
// Nothing to clear
break;
}
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::ClearFloaters: mY=%d clearYMost=%d",
mY, clearYMost));
mY = mBorderPadding.top + clearYMost + 1;
// Get a new band
GetAvailableSpace();
}
}
//////////////////////////////////////////////////////////////////////
// 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;
}
NS_IMETHODIMP
nsBlockFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// Paint our background and border
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible && mRect.width && mRect.height) {
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, skipSides);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
if (nsIFrame::GetShowFrameBorders()) {
nsIView* view;
GetView(view);
if (nsnull != view) {
aRenderingContext.SetColor(NS_RGB(0,0,255));
}
else {
aRenderingContext.SetColor(NS_RGB(255,0,0));
}
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
return NS_OK;
}
// aDirtyRect is in our coordinate system
// child rect's are also in our coordinate system
void
nsBlockFrame::PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// Set clip rect so that children don't leak out of us, but only if
// we are supposed to.
const nsStyleDisplay* disp = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
PRBool hidden = PR_FALSE;
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
aRenderingContext.PushState();
aRenderingContext.SetClipRect(nsRect(0, 0, mRect.width, mRect.height),
nsClipCombine_kIntersect);
hidden = PR_TRUE;
}
// See if we should render everything, or just what can be seen
PRBool renderEverything = PR_TRUE;
if (NS_STYLE_OVERFLOW_VISIBLE != disp->mOverflow) {
renderEverything = PR_FALSE;
}
renderEverything = PR_FALSE;
if ((nsnull == mPrevInFlow) && (nsnull != mBullet)) {
const nsStyleList* list;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&)list);
if (NS_STYLE_LIST_STYLE_POSITION_OUTSIDE == list->mListStylePosition) {
// Paint the bullet too
PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
PR_TRUE);
}
}
//XXX ListTag(stdout); printf(": overflow=%d dirtyRect={%d,%d,%d,%d}\n", disp->mOverflow, aDirtyRect);
// Iterate the lines looking for lines that intersect the dirty rect
for (LineData* line = mLines; nsnull != line; line = line->mNext) {
// Stop when we get to a line that's below the dirty rect
if (line->mBounds.y >= aDirtyRect.YMost()) {
break;
}
// If the line overlaps the dirty rect then iterate the child frames
// and paint those frames that intersect the dirty rect
if (line->mBounds.YMost() > aDirtyRect.y) {
nsIFrame* kid = line->mFirstChild;
for (PRUint16 i = 0; i < line->mChildCount; i++) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
renderEverything);
kid->GetNextSibling(kid);
}
}
}
if (hidden) {
aRenderingContext.PopState();
}
}
void
nsBlockFrame::PaintChild(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsIFrame* aFrame,
PRBool aAlwaysRender)
{
nsIView *pView;
aFrame->GetView(pView);
if (nsnull == pView) {
nsRect kidRect;
aFrame->GetRect(kidRect);
nsRect damageArea;
PRBool overlap;
if (aAlwaysRender) {
overlap = PR_TRUE;
damageArea = aDirtyRect;
}
else {
overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
#ifdef NS_DEBUG
if (!overlap && (0 == kidRect.width) && (0 == kidRect.height)) {
overlap = PR_TRUE;
}
#endif
}
if (overlap || aAlwaysRender) {
// Translate damage area into kid's coordinate system
nsRect kidDamageArea(damageArea.x - kidRect.x,
damageArea.y - kidRect.y,
damageArea.width, damageArea.height);
aRenderingContext.PushState();
aRenderingContext.Translate(kidRect.x, kidRect.y);
aFrame->Paint(aPresContext, aRenderingContext, kidDamageArea);
#ifdef NS_DEBUG
if (nsIFrame::GetShowFrameBorders() &&
(0 != kidRect.width) && (0 != kidRect.height)) {
nsIView* view;
GetView(view);
if (nsnull != view) {
aRenderingContext.SetColor(NS_RGB(0,0,255));
}
else {
aRenderingContext.SetColor(NS_RGB(255,0,0));
}
aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height);
}
#endif
aRenderingContext.PopState();
}
}
}
//////////////////////////////////////////////////////////////////////
// Debugging
#ifdef NS_DEBUG
static PRBool
InLineList(LineData* aLines, nsIFrame* aFrame)
{
while (nsnull != aLines) {
nsIFrame* frame = aLines->mFirstChild;
PRInt32 n = aLines->mChildCount;
while (--n >= 0) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(frame);
}
aLines = aLines->mNext;
}
return PR_FALSE;
}
static PRBool
InSiblingList(LineData* 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(nsIFrame* aFrame)
{
nsIFrame* parent;
aFrame->GetGeometricParent(parent);
if (parent != (nsIFrame*)this) {
return PR_FALSE;
}
if (InLineList(mLines, aFrame) && InSiblingList(mLines, aFrame)) {
return PR_TRUE;
}
if (InLineList(mOverflowLines, aFrame) &&
InSiblingList(mOverflowLines, aFrame)) {
return PR_TRUE;
}
return PR_FALSE;
}
#endif
#define VERIFY_ASSERT(_expr, _msg) \
if (!(_expr)) { \
DumpTree(); \
} \
NS_ASSERTION(_expr, _msg)
NS_IMETHODIMP
nsBlockFrame::VerifyTree() const
{
// XXX rewrite this
return NS_OK;
}
#ifdef DO_SELECTION
nsIFrame * nsBlockFrame::FindHitFrame(nsBlockFrame * aBlockFrame,
const nscoord aX,
const nscoord aY,
const nsPoint & aPoint)
{
nsPoint mousePoint(aPoint.x-aX, aPoint.y-aY);
nsIFrame * contentFrame = nsnull;
LineData * line = aBlockFrame->mLines;
if (nsnull != line) {
// First find the line that contains the aIndex
while (nsnull != line && contentFrame == nsnull) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->mChildCount;
while (--n >= 0) {
nsRect bounds;
frame->GetRect(bounds);
if (bounds.Contains(mousePoint)) {
nsBlockFrame * blockFrame;
if (NS_OK == frame->QueryInterface(kBlockFrameCID, (void**)&blockFrame)) {
frame = FindHitFrame(blockFrame, bounds.x, bounds.y, aPoint);
//NS_RELEASE(blockFrame);
return frame;
} else {
return frame;
}
}
frame->GetNextSibling(frame);
}
line = line->mNext;
}
}
return aBlockFrame;
}
NS_IMETHODIMP
nsBlockFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (0) {
nsHTMLContainerFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
//return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
aEventStatus = nsEventStatus_eIgnore;
//if (nsnull != mContent && (aEvent->message != NS_MOUSE_LEFT_BUTTON_UP ||
// (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP && !mDoingSelection))) {
if (nsnull != mContent) {
mContent->HandleDOMEvent(aPresContext, (nsEvent*)aEvent, nsnull, DOM_EVENT_INIT, aEventStatus);
}
if (DisplaySelection(aPresContext) == PR_FALSE) {
if (aEvent->message != NS_MOUSE_LEFT_BUTTON_DOWN) {
return NS_OK;
}
}
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
int x = 0;
}
//nsRect bounds;
//GetRect(bounds);
//nsIFrame * contentFrame = FindHitFrame(this, bounds.x, bounds.y, aEvent->point);
nsIFrame * contentFrame = FindHitFrame(this, 0,0, aEvent->point);
if (contentFrame == nsnull) {
return NS_OK;
}
if(nsEventStatus_eConsumeNoDefault != aEventStatus) {
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
} else if (aEvent->message == NS_MOUSE_MOVE && mDoingSelection ||
aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
// no-op
} else {
return NS_OK;
}
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
if (mDoingSelection) {
contentFrame->HandleRelease(aPresContext, aEvent, aEventStatus);
}
} else if (aEvent->message == NS_MOUSE_MOVE) {
mDidDrag = PR_TRUE;
contentFrame->HandleDrag(aPresContext, aEvent, aEventStatus);
} else if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
contentFrame->HandlePress(aPresContext, aEvent, aEventStatus);
}
}
return NS_OK;
}
nsIFrame * gNearByFrame = nsnull;
NS_METHOD nsBlockFrame::HandleDrag(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (DisplaySelection(aPresContext) == PR_FALSE)
{
aEventStatus = nsEventStatus_eIgnore;
return NS_OK;
}
// Keep old start and end
//nsIContent * startContent = mSelectionRange->GetStartContent(); // ref counted
//nsIContent * endContent = mSelectionRange->GetEndContent(); // ref counted
mDidDrag = PR_TRUE;
nsIFrame * contentFrame = nsnull;
LineData* line = mLines;
if (nsnull != line) {
// First find the line that contains the aIndex
while (nsnull != line && contentFrame == nsnull) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->mChildCount;
while (--n >= 0) {
nsRect bounds;
frame->GetRect(bounds);
if (aEvent->point.y >= bounds.y && aEvent->point.y < bounds.y+bounds.height) {
contentFrame = frame;
if (frame != gNearByFrame) {
if (gNearByFrame != nsnull) {
int x = 0;
}
aEvent->point.x = bounds.x+bounds.width-50;
gNearByFrame = frame;
return contentFrame->HandleDrag(aPresContext, aEvent, aEventStatus);
} else {
return NS_OK;
}
//break;
}
frame->GetNextSibling(frame);
}
line = line->mNext;
}
}
return NS_OK;
}
#endif