nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsPresContext* aPresContext,
nsBlockFrame* aFrame,
bool aBStartMarginRoot,
bool aBEndMarginRoot,
bool aBlockNeedsFloatManager,
nscoord aConsumedBSize)
: mBlock(aFrame),
mPresContext(aPresContext),
mReflowState(aReflowState),
mContentArea(aReflowState.GetWritingMode()),
mPushedFloats(nullptr),
mOverflowTracker(nullptr),
mBorderPadding(mReflowState.ComputedLogicalBorderPadding()),
mPrevBEndMargin(),
mLineNumber(0),
mFlags(0),
mFloatBreakType(NS_STYLE_CLEAR_NONE),
mConsumedBSize(aConsumedBSize)
{
if (!sFloatFragmentsInsideColumnPrefCached) {
sFloatFragmentsInsideColumnPrefCached = true;
Preferences::AddBoolVarCache(&sFloatFragmentsInsideColumnEnabled,
"layout.float-fragments-inside-column.enabled");
}
SetFlag(BRS_FLOAT_FRAGMENTS_INSIDE_COLUMN_ENABLED, sFloatFragmentsInsideColumnEnabled);
WritingMode wm = aReflowState.GetWritingMode();
SetFlag(BRS_ISFIRSTINFLOW, aFrame->GetPrevInFlow() == nullptr);
SetFlag(BRS_ISOVERFLOWCONTAINER, IS_TRUE_OVERFLOW_CONTAINER(aFrame));
nsIFrame::LogicalSides logicalSkipSides =
aFrame->GetLogicalSkipSides(&aReflowState);
mBorderPadding.ApplySkipSides(logicalSkipSides);
// Note that mContainerSize is the physical size, needed to
// convert logical block-coordinates in vertical-rl writing mode
// (measured from a RHS origin) to physical coordinates within the
// containing block.
// If aReflowState doesn't have a constrained ComputedWidth(), we set
// mContainerSize.width to zero, which means lines will be positioned
// (physically) incorrectly; we will fix them up at the end of
// nsBlockFrame::Reflow, after we know the total block-size of the
// frame.
mContainerSize.width = aReflowState.ComputedWidth();
if (mContainerSize.width == NS_UNCONSTRAINEDSIZE) {
mContainerSize.width = 0;
}
mContainerSize.width += mBorderPadding.LeftRight(wm);
// For now at least, we don't do that fix-up for mContainerHeight.
// It's only used in nsBidiUtils::ReorderFrames for vertical rtl
// writing modes, which aren't fully supported for the time being.
mContainerSize.height = aReflowState.ComputedHeight() +
mBorderPadding.TopBottom(wm);
if ((aBStartMarginRoot && !logicalSkipSides.BStart()) ||
0 != mBorderPadding.BStart(wm)) {
SetFlag(BRS_ISBSTARTMARGINROOT, true);
SetFlag(BRS_APPLYBSTARTMARGIN, true);
}
if ((aBEndMarginRoot && !logicalSkipSides.BEnd()) ||
0 != mBorderPadding.BEnd(wm)) {
SetFlag(BRS_ISBENDMARGINROOT, true);
}
if (aBlockNeedsFloatManager) {
SetFlag(BRS_FLOAT_MGR, true);
}
mFloatManager = aReflowState.mFloatManager;
NS_ASSERTION(mFloatManager,
"FloatManager should be set in nsBlockReflowState" );
if (mFloatManager) {
// Save the coordinate system origin for later.
mFloatManager->GetTranslation(mFloatManagerI, mFloatManagerB);
mFloatManager->PushState(&mFloatManagerStateBefore); // never popped
}
mReflowStatus = NS_FRAME_COMPLETE;
mNextInFlow = static_cast<nsBlockFrame*>(mBlock->GetNextInFlow());
LAYOUT_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aReflowState.ComputedISize(),
"have unconstrained width; this should only result "
"from very large sizes, not attempts at intrinsic "
"width calculation");
mContentArea.ISize(wm) = aReflowState.ComputedISize();
// Compute content area height. Unlike the width, if we have a
// specified style height we ignore it since extra content is
// managed by the "overflow" property. When we don't have a
// specified style height then we may end up limiting our height if
// the availableHeight is constrained (this situation occurs when we
// are paginated).
if (NS_UNCONSTRAINEDSIZE != aReflowState.AvailableBSize()) {
// We are in a paginated situation. The bottom edge is just inside
// the bottom border and padding. The content area height doesn't
// include either border or padding edge.
mBEndEdge = aReflowState.AvailableBSize() - mBorderPadding.BEnd(wm);
mContentArea.BSize(wm) = std::max(0, mBEndEdge - mBorderPadding.BStart(wm));
}
else {
// When we are not in a paginated situation then we always use
// an constrained height.
SetFlag(BRS_UNCONSTRAINEDBSIZE, true);
mContentArea.BSize(wm) = mBEndEdge = NS_UNCONSTRAINEDSIZE;
}
mContentArea.IStart(wm) = mBorderPadding.IStart(wm);
mBCoord = mContentArea.BStart(wm) = mBorderPadding.BStart(wm);
mPrevChild = nullptr;
mCurrentLine = aFrame->end_lines();
mMinLineHeight = aReflowState.CalcLineHeight();
}
void
BRFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("BRFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
WritingMode wm = aReflowState.GetWritingMode();
LogicalSize finalSize(wm);
finalSize.BSize(wm) = 0; // BR frames with block size 0 are ignored in quirks
// mode by nsLineLayout::VerticalAlignFrames .
// However, it's not always 0. See below.
finalSize.ISize(wm) = 0;
aMetrics.SetBlockStartAscent(0);
// Only when the BR is operating in a line-layout situation will it
// behave like a BR. Additionally, we suppress breaks from BR inside
// of ruby frames. To determine if we're inside ruby, we have to rely
// on the *parent's* ShouldSuppressLineBreak() method, instead of our
// own, because we may have custom "display" value that makes our
// ShouldSuppressLineBreak() return false.
nsLineLayout* ll = aReflowState.mLineLayout;
if (ll && !GetParent()->StyleContext()->ShouldSuppressLineBreak()) {
// Note that the compatibility mode check excludes AlmostStandards
// mode, since this is the inline box model. See bug 161691.
if ( ll->LineIsEmpty() ||
aPresContext->CompatibilityMode() == eCompatibility_FullStandards ) {
// The line is logically empty; any whitespace is trimmed away.
//
// If this frame is going to terminate the line we know
// that nothing else will go on the line. Therefore, in this
// case, we provide some height for the BR frame so that it
// creates some vertical whitespace. It's necessary to use the
// line-height rather than the font size because the
// quirks-mode fix that doesn't apply the block's min
// line-height makes this necessary to make BR cause a line
// of the full line-height
// We also do this in strict mode because BR should act like a
// normal inline frame. That line-height is used is important
// here for cases where the line-height is less than 1.
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
if (fm) {
nscoord logicalHeight = aReflowState.CalcLineHeight();
finalSize.BSize(wm) = logicalHeight;
aMetrics.SetBlockStartAscent(nsLayoutUtils::GetCenteredFontBaseline(
fm, logicalHeight, wm.IsLineInverted()));
}
else {
aMetrics.SetBlockStartAscent(aMetrics.BSize(wm) = 0);
}
// XXX temporary until I figure out a better solution; see the
// code in nsLineLayout::VerticalAlignFrames that zaps minY/maxY
// if the width is zero.
// XXX This also fixes bug 10036!
// Warning: nsTextControlFrame::CalculateSizeStandard depends on
// the following line, see bug 228752.
// The code below in AddInlinePrefISize also adds 1 appunit to width
finalSize.ISize(wm) = 1;
}
// Return our reflow status
uint32_t breakType = aReflowState.mStyleDisplay->PhysicalBreakType(wm);
if (NS_STYLE_CLEAR_NONE == breakType) {
breakType = NS_STYLE_CLEAR_LINE;
}
aStatus = NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
NS_INLINE_MAKE_BREAK_TYPE(breakType);
ll->SetLineEndsInBR(true);
}
else {
aStatus = NS_FRAME_COMPLETE;
}
aMetrics.SetSize(wm, finalSize);
aMetrics.SetOverflowAreasToDesiredBounds();
mAscent = aMetrics.BlockStartAscent();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
}
nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsPresContext* aPresContext,
nsBlockFrame* aFrame,
const nsHTMLReflowMetrics& aMetrics,
bool aTopMarginRoot,
bool aBottomMarginRoot,
bool aBlockNeedsFloatManager)
: mBlock(aFrame),
mPresContext(aPresContext),
mReflowState(aReflowState),
mPushedFloats(nsnull),
mOverflowTracker(nsnull),
mPrevBottomMargin(),
mLineNumber(0),
mFlags(0),
mFloatBreakType(NS_STYLE_CLEAR_NONE)
{
SetFlag(BRS_ISFIRSTINFLOW, aFrame->GetPrevInFlow() == nsnull);
SetFlag(BRS_ISOVERFLOWCONTAINER,
IS_TRUE_OVERFLOW_CONTAINER(aFrame));
const nsMargin& borderPadding = BorderPadding();
if (aTopMarginRoot || 0 != aReflowState.mComputedBorderPadding.top) {
SetFlag(BRS_ISTOPMARGINROOT, true);
}
if (aBottomMarginRoot || 0 != aReflowState.mComputedBorderPadding.bottom) {
SetFlag(BRS_ISBOTTOMMARGINROOT, true);
}
if (GetFlag(BRS_ISTOPMARGINROOT)) {
SetFlag(BRS_APPLYTOPMARGIN, true);
}
if (aBlockNeedsFloatManager) {
SetFlag(BRS_FLOAT_MGR, true);
}
mFloatManager = aReflowState.mFloatManager;
NS_ASSERTION(mFloatManager,
"FloatManager should be set in nsBlockReflowState" );
if (mFloatManager) {
// Save the coordinate system origin for later.
mFloatManager->GetTranslation(mFloatManagerX, mFloatManagerY);
mFloatManager->PushState(&mFloatManagerStateBefore); // never popped
}
mReflowStatus = NS_FRAME_COMPLETE;
mPresContext = aPresContext;
mNextInFlow = static_cast<nsBlockFrame*>(mBlock->GetNextInFlow());
NS_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aReflowState.ComputedWidth(),
"have unconstrained width; this should only result from "
"very large sizes, not attempts at intrinsic width "
"calculation");
mContentArea.width = aReflowState.ComputedWidth();
// Compute content area height. Unlike the width, if we have a
// specified style height we ignore it since extra content is
// managed by the "overflow" property. When we don't have a
// specified style height then we may end up limiting our height if
// the availableHeight is constrained (this situation occurs when we
// are paginated).
if (NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight) {
// We are in a paginated situation. The bottom edge is just inside
// the bottom border and padding. The content area height doesn't
// include either border or padding edge.
mBottomEdge = aReflowState.availableHeight - borderPadding.bottom;
mContentArea.height = NS_MAX(0, mBottomEdge - borderPadding.top);
}
else {
// When we are not in a paginated situation then we always use
// an constrained height.
SetFlag(BRS_UNCONSTRAINEDHEIGHT, true);
mContentArea.height = mBottomEdge = NS_UNCONSTRAINEDSIZE;
}
mContentArea.x = borderPadding.left;
mY = mContentArea.y = borderPadding.top;
mPrevChild = nsnull;
mCurrentLine = aFrame->end_lines();
mMinLineHeight = aReflowState.CalcLineHeight();
}
nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
nsPresContext* aPresContext,
nsBlockFrame* aFrame,
bool aBStartMarginRoot,
bool aBEndMarginRoot,
bool aBlockNeedsFloatManager,
nscoord aConsumedBSize)
: mBlock(aFrame),
mPresContext(aPresContext),
mReflowState(aReflowState),
mContentArea(aReflowState.GetWritingMode()),
mPushedFloats(nullptr),
mOverflowTracker(nullptr),
mBorderPadding(mReflowState.ComputedLogicalBorderPadding()),
mPrevBEndMargin(),
mLineNumber(0),
mFlags(0),
mFloatBreakType(NS_STYLE_CLEAR_NONE),
mConsumedBSize(aConsumedBSize)
{
WritingMode wm = aReflowState.GetWritingMode();
SetFlag(BRS_ISFIRSTINFLOW, aFrame->GetPrevInFlow() == nullptr);
SetFlag(BRS_ISOVERFLOWCONTAINER, IS_TRUE_OVERFLOW_CONTAINER(aFrame));
nsIFrame::LogicalSides logicalSkipSides =
aFrame->GetLogicalSkipSides(&aReflowState);
mBorderPadding.ApplySkipSides(logicalSkipSides);
// Note that mContainerWidth is the physical width!
mContainerWidth = aReflowState.ComputedWidth() + mBorderPadding.LeftRight(wm);
if ((aBStartMarginRoot && !logicalSkipSides.BStart()) ||
0 != mBorderPadding.BStart(wm)) {
SetFlag(BRS_ISBSTARTMARGINROOT, true);
SetFlag(BRS_APPLYBSTARTMARGIN, true);
}
if ((aBEndMarginRoot && !logicalSkipSides.BEnd()) ||
0 != mBorderPadding.BEnd(wm)) {
SetFlag(BRS_ISBENDMARGINROOT, true);
}
if (aBlockNeedsFloatManager) {
SetFlag(BRS_FLOAT_MGR, true);
}
mFloatManager = aReflowState.mFloatManager;
NS_ASSERTION(mFloatManager,
"FloatManager should be set in nsBlockReflowState" );
if (mFloatManager) {
// Save the coordinate system origin for later.
mFloatManager->GetTranslation(mFloatManagerX, mFloatManagerY);
mFloatManager->PushState(&mFloatManagerStateBefore); // never popped
}
mReflowStatus = NS_FRAME_COMPLETE;
mNextInFlow = static_cast<nsBlockFrame*>(mBlock->GetNextInFlow());
NS_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aReflowState.ComputedISize(),
"have unconstrained width; this should only result from "
"very large sizes, not attempts at intrinsic width "
"calculation");
mContentArea.ISize(wm) = aReflowState.ComputedISize();
// Compute content area height. Unlike the width, if we have a
// specified style height we ignore it since extra content is
// managed by the "overflow" property. When we don't have a
// specified style height then we may end up limiting our height if
// the availableHeight is constrained (this situation occurs when we
// are paginated).
if (NS_UNCONSTRAINEDSIZE != aReflowState.AvailableBSize()) {
// We are in a paginated situation. The bottom edge is just inside
// the bottom border and padding. The content area height doesn't
// include either border or padding edge.
mBEndEdge = aReflowState.AvailableBSize() - mBorderPadding.BEnd(wm);
mContentArea.BSize(wm) = std::max(0, mBEndEdge - mBorderPadding.BStart(wm));
}
else {
// When we are not in a paginated situation then we always use
// an constrained height.
SetFlag(BRS_UNCONSTRAINEDBSIZE, true);
mContentArea.BSize(wm) = mBEndEdge = NS_UNCONSTRAINEDSIZE;
}
mContentArea.IStart(wm) = mBorderPadding.IStart(wm);
mBCoord = mContentArea.BStart(wm) = mBorderPadding.BStart(wm);
mPrevChild = nullptr;
mCurrentLine = aFrame->end_lines();
mMinLineHeight = aReflowState.CalcLineHeight();
}
