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Bug 258118. Ensure that float breaks are eventually honoured even if the line with the break is not reflowed and the following line is empty. r+sr=dbaron(rubber-stamp)

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This commit is contained in:
roc+%cs.cmu.edu 2004-09-13 02:21:35 +00:00
parent 2a8936b1a7
commit beb5bd3a80
4 changed files with 48 additions and 46 deletions
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42
layout/generic/nsBlockFrame.cpp
View File

@ -1919,6 +1919,7 @@ WrappedLinesAreDirty(nsLineList::iterator aLine,
}
static void PlaceFrameView(nsPresContext* aPresContext, nsIFrame* aFrame);
static PRUint8 CombineBreakType(PRUint8 aOrigBreakType, PRUint8 aNewBreakType);
/**
* Reflow the dirty lines
@ -1968,6 +1969,7 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// recompute the carried out margin before the line if we want to
// reflow it or if its previous margin is dirty
PRBool needToRecoverState = PR_FALSE;
PRUint8 floatBreakType = NS_STYLE_CLEAR_NONE;
// Reflow the lines that are already ours
line_iterator line = begin_lines(), line_end = end_lines();
@ -2004,18 +2006,10 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// before calling PropagateFloatDamage.
if (needToRecoverState &&
(line->IsDirty() || line->IsPreviousMarginDirty())) {
// If the previous line had a 'clear' in it, we need to do the
// same thing that we do in |PlaceLine|.
--line;
if (line->IsInline()) {
PRUint8 breakType = line->GetBreakType();
if (breakType == NS_STYLE_CLEAR_LEFT ||
breakType == NS_STYLE_CLEAR_RIGHT ||
breakType == NS_STYLE_CLEAR_LEFT_AND_RIGHT)
aState.ClearFloats(aState.mY, breakType);
if (floatBreakType != NS_STYLE_CLEAR_NONE) {
aState.ClearFloats(aState.mY, floatBreakType);
floatBreakType = NS_STYLE_CLEAR_NONE;
}
++line;
// We need to reconstruct the bottom margin only if we didn't
// reflow the previous line and we do need to reflow (or repair
@ -2105,7 +2099,17 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// PlaceLine does.
if (!line->IsEmpty()) {
aState.mY = line->mBounds.YMost();
// This will include any pending float clearing height, so
// don't bother clearing previous lines' floats
floatBreakType = NS_STYLE_CLEAR_NONE;
}
// Record if we need to clear floats before reflowing the next
// line
if (line->HasFloatBreak()) {
floatBreakType = ::CombineBreakType(floatBreakType, line->GetBreakType());
}
needToRecoverState = PR_TRUE;
}
@ -4091,13 +4095,8 @@ nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
// Apply break-after clearing if necessary
// This must stay in sync with |ReflowDirtyLines|.
PRUint8 breakType = aLine->GetBreakType();
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloats(aState.mY, breakType);
break;
if (aLine->HasFloatBreak()) {
aState.ClearFloats(aState.mY, aLine->GetBreakType());
}
return PR_FALSE;
@ -5164,11 +5163,8 @@ nsBlockFrame::ReflowFloat(nsBlockReflowState& aState,
if (mPrevInFlow) {
// get the break type of the last line in mPrevInFlow
line_iterator endLine = --((nsBlockFrame*)mPrevInFlow)->end_lines();
PRUint8 breakType = endLine->GetBreakType();
if ((NS_STYLE_CLEAR_LEFT == breakType) ||
(NS_STYLE_CLEAR_RIGHT == breakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == breakType)) {
aState.mFloatBreakType = breakType;
if (endLine->HasFloatBreak()) {
aState.mFloatBreakType = endLine->GetBreakType();
}
}
else NS_ASSERTION(PR_FALSE, "no prev in flow");

5
layout/generic/nsLineBox.h
View File

@ -303,6 +303,11 @@ public:
PRBool HasBreak() const {
return NS_STYLE_CLEAR_NONE != mFlags.mBreakType;
}
PRBool HasFloatBreak() const {
return NS_STYLE_CLEAR_LEFT == mFlags.mBreakType ||
NS_STYLE_CLEAR_RIGHT == mFlags.mBreakType ||
NS_STYLE_CLEAR_LEFT_AND_RIGHT == mFlags.mBreakType;
}
void SetBreakType(PRUint8 aBreakType) {
NS_WARN_IF_FALSE(aBreakType <= LINE_MAX_BREAK_TYPE, "bad break type");
mFlags.mBreakType = aBreakType;

42
layout/html/base/src/nsBlockFrame.cpp
View File

@ -1919,6 +1919,7 @@ WrappedLinesAreDirty(nsLineList::iterator aLine,
}
static void PlaceFrameView(nsPresContext* aPresContext, nsIFrame* aFrame);
static PRUint8 CombineBreakType(PRUint8 aOrigBreakType, PRUint8 aNewBreakType);
/**
* Reflow the dirty lines
@ -1968,6 +1969,7 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// recompute the carried out margin before the line if we want to
// reflow it or if its previous margin is dirty
PRBool needToRecoverState = PR_FALSE;
PRUint8 floatBreakType = NS_STYLE_CLEAR_NONE;
// Reflow the lines that are already ours
line_iterator line = begin_lines(), line_end = end_lines();
@ -2004,18 +2006,10 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// before calling PropagateFloatDamage.
if (needToRecoverState &&
(line->IsDirty() || line->IsPreviousMarginDirty())) {
// If the previous line had a 'clear' in it, we need to do the
// same thing that we do in |PlaceLine|.
--line;
if (line->IsInline()) {
PRUint8 breakType = line->GetBreakType();
if (breakType == NS_STYLE_CLEAR_LEFT ||
breakType == NS_STYLE_CLEAR_RIGHT ||
breakType == NS_STYLE_CLEAR_LEFT_AND_RIGHT)
aState.ClearFloats(aState.mY, breakType);
if (floatBreakType != NS_STYLE_CLEAR_NONE) {
aState.ClearFloats(aState.mY, floatBreakType);
floatBreakType = NS_STYLE_CLEAR_NONE;
}
++line;
// We need to reconstruct the bottom margin only if we didn't
// reflow the previous line and we do need to reflow (or repair
@ -2105,7 +2099,17 @@ nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
// PlaceLine does.
if (!line->IsEmpty()) {
aState.mY = line->mBounds.YMost();
// This will include any pending float clearing height, so
// don't bother clearing previous lines' floats
floatBreakType = NS_STYLE_CLEAR_NONE;
}
// Record if we need to clear floats before reflowing the next
// line
if (line->HasFloatBreak()) {
floatBreakType = ::CombineBreakType(floatBreakType, line->GetBreakType());
}
needToRecoverState = PR_TRUE;
}
@ -4091,13 +4095,8 @@ nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
// Apply break-after clearing if necessary
// This must stay in sync with |ReflowDirtyLines|.
PRUint8 breakType = aLine->GetBreakType();
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloats(aState.mY, breakType);
break;
if (aLine->HasFloatBreak()) {
aState.ClearFloats(aState.mY, aLine->GetBreakType());
}
return PR_FALSE;
@ -5164,11 +5163,8 @@ nsBlockFrame::ReflowFloat(nsBlockReflowState& aState,
if (mPrevInFlow) {
// get the break type of the last line in mPrevInFlow
line_iterator endLine = --((nsBlockFrame*)mPrevInFlow)->end_lines();
PRUint8 breakType = endLine->GetBreakType();
if ((NS_STYLE_CLEAR_LEFT == breakType) ||
(NS_STYLE_CLEAR_RIGHT == breakType) ||
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == breakType)) {
aState.mFloatBreakType = breakType;
if (endLine->HasFloatBreak()) {
aState.mFloatBreakType = endLine->GetBreakType();
}
}
else NS_ASSERTION(PR_FALSE, "no prev in flow");

5
layout/html/base/src/nsLineBox.h
View File

@ -303,6 +303,11 @@ public:
PRBool HasBreak() const {
return NS_STYLE_CLEAR_NONE != mFlags.mBreakType;
}
PRBool HasFloatBreak() const {
return NS_STYLE_CLEAR_LEFT == mFlags.mBreakType ||
NS_STYLE_CLEAR_RIGHT == mFlags.mBreakType ||
NS_STYLE_CLEAR_LEFT_AND_RIGHT == mFlags.mBreakType;
}
void SetBreakType(PRUint8 aBreakType) {
NS_WARN_IF_FALSE(aBreakType <= LINE_MAX_BREAK_TYPE, "bad break type");
mFlags.mBreakType = aBreakType;