void RenderMathMLPadded::layoutBlock(bool relayoutChildren, LayoutUnit)
{
ASSERT(needsLayout());
if (!relayoutChildren && simplifiedLayout())
return;
// We first layout our children as a normal <mrow> element.
LayoutUnit contentAscent, contentDescent, contentWidth;
contentAscent = contentDescent = 0;
RenderMathMLRow::computeLineVerticalStretch(contentAscent, contentDescent);
RenderMathMLRow::layoutRowItems(contentAscent, contentDescent);
contentWidth = logicalWidth();
// We parse the mpadded attributes using the content metrics as the default value.
LayoutUnit width = contentWidth;
LayoutUnit ascent = contentAscent;
LayoutUnit descent = contentDescent;
LayoutUnit lspace = 0;
LayoutUnit voffset = 0;
resolveAttributes(width, ascent, descent, lspace, voffset);
// Align children on the new baseline and shift them by (lspace, -voffset)
LayoutPoint contentLocation(lspace, ascent - contentAscent - voffset);
for (auto* child = firstChildBox(); child; child = child->nextSiblingBox())
child->setLocation(child->location() + contentLocation);
// Set the final metrics.
setLogicalWidth(width);
m_ascent = ascent;
setLogicalHeight(ascent + descent);
clearNeedsLayout();
}
void RenderMathMLFraction::layoutBlock(bool relayoutChildren, LayoutUnit)
{
ASSERT(needsLayout());
if (!relayoutChildren && simplifiedLayout())
return;
if (!isValid()) {
setLogicalWidth(0);
setLogicalHeight(0);
clearNeedsLayout();
return;
}
numerator().layoutIfNeeded();
denominator().layoutIfNeeded();
setLogicalWidth(std::max(numerator().logicalWidth(), denominator().logicalWidth()));
updateLineThickness();
LayoutUnit verticalOffset = 0; // This is the top of the renderer.
LayoutPoint numeratorLocation(horizontalOffset(numerator(), element().numeratorAlignment()), verticalOffset);
numerator().setLocation(numeratorLocation);
LayoutUnit numeratorAscent = ascentForChild(numerator());
LayoutUnit numeratorDescent = numerator().logicalHeight() - numeratorAscent;
LayoutUnit denominatorAscent = ascentForChild(denominator());
LayoutUnit denominatorDescent = denominator().logicalHeight() - denominatorAscent;
if (isStack()) {
LayoutUnit gapMin, topShiftUp, bottomShiftDown;
getStackParameters(gapMin, topShiftUp, bottomShiftDown);
LayoutUnit gap = topShiftUp - numeratorDescent + bottomShiftDown - denominatorAscent;
if (gap < gapMin) {
// If the gap is not large enough, we increase the shifts by the same value.
LayoutUnit delta = (gapMin - gap) / 2;
topShiftUp += delta;
bottomShiftDown += delta;
}
verticalOffset += numeratorAscent + topShiftUp; // This is the middle of the stack gap.
m_ascent = verticalOffset + mathAxisHeight();
verticalOffset += bottomShiftDown - denominatorAscent;
} else {
LayoutUnit numeratorGapMin, denominatorGapMin, numeratorMinShiftUp, denominatorMinShiftDown;
getFractionParameters(numeratorGapMin, denominatorGapMin, numeratorMinShiftUp, denominatorMinShiftDown);
verticalOffset += std::max(numerator().logicalHeight() + numeratorGapMin + m_lineThickness / 2, numeratorAscent + numeratorMinShiftUp); // This is the middle of the fraction bar.
m_ascent = verticalOffset + mathAxisHeight();
verticalOffset += std::max(m_lineThickness / 2 + denominatorGapMin, denominatorMinShiftDown - denominatorAscent);
}
LayoutPoint denominatorLocation(horizontalOffset(denominator(), element().denominatorAlignment()), verticalOffset);
denominator().setLocation(denominatorLocation);
verticalOffset = std::max(verticalOffset + denominator().logicalHeight(), m_ascent + denominatorDescent); // This is the bottom of our renderer.
setLogicalHeight(verticalOffset);
clearNeedsLayout();
}
void RenderGrid::layoutBlock(bool relayoutChildren, LayoutUnit)
{
ASSERT(needsLayout());
if (!relayoutChildren && simplifiedLayout())
return;
// FIXME: Much of this method is boiler plate that matches RenderBox::layoutBlock and Render*FlexibleBox::layoutBlock.
// It would be nice to refactor some of the duplicate code.
LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
if (inRenderFlowThread()) {
// Regions changing widths can force us to relayout our children.
if (logicalWidthChangedInRegions())
relayoutChildren = true;
}
computeInitialRegionRangeForBlock();
LayoutSize previousSize = size();
setLogicalHeight(0);
computeLogicalWidth();
m_overflow.clear();
layoutGridItems();
LayoutUnit oldClientAfterEdge = clientLogicalBottom();
computeLogicalHeight();
if (size() != previousSize)
relayoutChildren = true;
layoutPositionedObjects(relayoutChildren || isRoot());
computeRegionRangeForBlock();
computeOverflow(oldClientAfterEdge);
statePusher.pop();
updateLayerTransform();
// Update our scroll information if we're overflow:auto/scroll/hidden now that we know if
// we overflow or not.
if (hasOverflowClip())
layer()->updateScrollInfoAfterLayout();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
void RenderBlockFlow::layoutBlock(bool relayoutChildren)
{
ASSERT(needsLayout());
ASSERT(isInlineBlock() || !isInline());
if (!relayoutChildren && simplifiedLayout())
return;
SubtreeLayoutScope layoutScope(*this);
layoutBlockFlow(relayoutChildren, layoutScope);
updateLayerTransformAfterLayout();
// Update our scroll information if we're overflow:auto/scroll/hidden now that we know if
// we overflow or not.
updateScrollInfoAfterLayout();
if (m_paintInvalidationLogicalTop != m_paintInvalidationLogicalBottom)
setShouldInvalidateOverflowForPaint(true);
clearNeedsLayout();
}
void RenderSVGText::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(*this));
bool updateCachedBoundariesInParents = false;
if (m_needsTransformUpdate) {
m_localTransform = textElement().animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
if (!everHadLayout()) {
// When laying out initially, collect all layout attributes, build the character data map,
// and propogate resulting SVGLayoutAttributes to all RenderSVGInlineText children in the subtree.
ASSERT(m_layoutAttributes.isEmpty());
collectLayoutAttributes(this, m_layoutAttributes);
updateFontInAllDescendants(this);
m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(*this);
m_needsReordering = true;
m_needsTextMetricsUpdate = false;
m_needsPositioningValuesUpdate = false;
updateCachedBoundariesInParents = true;
} else if (m_needsPositioningValuesUpdate) {
// When the x/y/dx/dy/rotate lists change, recompute the layout attributes, and eventually
// update the on-screen font objects as well in all descendants.
if (m_needsTextMetricsUpdate) {
updateFontInAllDescendants(this);
m_needsTextMetricsUpdate = false;
}
m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(*this);
m_needsReordering = true;
m_needsPositioningValuesUpdate = false;
updateCachedBoundariesInParents = true;
} else if (m_needsTextMetricsUpdate || SVGRenderSupport::findTreeRootObject(*this).isLayoutSizeChanged()) {
// If the root layout size changed (eg. window size changes) or the transform to the root
// context has changed then recompute the on-screen font size.
updateFontInAllDescendants(this, &m_layoutAttributesBuilder);
ASSERT(!m_needsReordering);
ASSERT(!m_needsPositioningValuesUpdate);
m_needsTextMetricsUpdate = false;
updateCachedBoundariesInParents = true;
}
checkLayoutAttributesConsistency(this, m_layoutAttributes);
// Reduced version of RenderBlock::layoutBlock(), which only takes care of SVG text.
// All if branches that could cause early exit in RenderBlocks layoutBlock() method are turned into assertions.
ASSERT(!isInline());
ASSERT(!simplifiedLayout());
ASSERT(!scrollsOverflow());
ASSERT(!hasControlClip());
ASSERT(!multiColumnFlowThread());
ASSERT(!positionedObjects());
ASSERT(!m_overflow);
ASSERT(!isAnonymousBlock());
if (!firstChild())
setChildrenInline(true);
// FIXME: We need to find a way to only layout the child boxes, if needed.
FloatRect oldBoundaries = objectBoundingBox();
ASSERT(childrenInline());
LayoutUnit repaintLogicalTop = 0;
LayoutUnit repaintLogicalBottom = 0;
rebuildFloatingObjectSetFromIntrudingFloats();
layoutInlineChildren(true, repaintLogicalTop, repaintLogicalBottom);
if (m_needsReordering)
m_needsReordering = false;
if (!updateCachedBoundariesInParents)
updateCachedBoundariesInParents = oldBoundaries != objectBoundingBox();
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(*this);
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
RenderSVGBlock::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
clearNeedsLayout();
}
void RenderSVGText::layout()
{
ASSERT(needsLayout());
LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
bool updateCachedBoundariesInParents = false;
if (m_needsTransformUpdate) {
SVGTextElement* text = static_cast<SVGTextElement*>(node());
m_localTransform = text->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
// If the root layout size changed (eg. window size changes) or the positioning values change, recompute the on-screen font size.
if (m_needsPositioningValuesUpdate || SVGRenderSupport::findTreeRootObject(this)->isLayoutSizeChanged()) {
recursiveUpdateScaledFont(this);
m_needsPositioningValuesUpdate = true;
updateCachedBoundariesInParents = true;
}
if (m_needsPositioningValuesUpdate) {
// Perform SVG text layout phase one (see SVGTextLayoutAttributesBuilder for details).
SVGTextLayoutAttributesBuilder layoutAttributesBuilder;
layoutAttributesBuilder.buildLayoutAttributesForTextSubtree(this);
m_needsReordering = true;
m_needsPositioningValuesUpdate = false;
updateCachedBoundariesInParents = true;
}
// Reduced version of RenderBlock::layoutBlock(), which only takes care of SVG text.
// All if branches that could cause early exit in RenderBlocks layoutBlock() method are turned into assertions.
ASSERT(!isInline());
ASSERT(!simplifiedLayout());
ASSERT(!scrollsOverflow());
ASSERT(!hasControlClip());
ASSERT(!hasColumns());
ASSERT(!positionedObjects());
ASSERT(!m_overflow);
ASSERT(!isAnonymousBlock());
if (!firstChild())
setChildrenInline(true);
// FIXME: We need to find a way to only layout the child boxes, if needed.
FloatRect oldBoundaries = objectBoundingBox();
ASSERT(childrenInline());
forceLayoutInlineChildren();
if (m_needsReordering)
m_needsReordering = false;
if (!updateCachedBoundariesInParents)
updateCachedBoundariesInParents = oldBoundaries != objectBoundingBox();
// Invalidate all resources of this client if our layout changed.
if (m_everHadLayout && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(this);
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
RenderSVGBlock::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
void RenderMathMLRoot::layoutBlock(bool relayoutChildren, LayoutUnit)
{
ASSERT(needsLayout());
if (!relayoutChildren && simplifiedLayout())
return;
updateStyle();
m_radicalOperatorTop = 0;
m_baseWidth = 0;
if (!isValid()) {
setLogicalWidth(0);
setLogicalHeight(0);
clearNeedsLayout();
return;
}
// We layout the children, determine the vertical metrics of the base and set the logical width.
// Note: Per the MathML specification, the children of <msqrt> are wrapped in an inferred <mrow>, which is the desired base.
LayoutUnit baseAscent, baseDescent;
recomputeLogicalWidth();
if (m_kind == SquareRoot) {
baseAscent = baseDescent;
RenderMathMLRow::computeLineVerticalStretch(baseAscent, baseDescent);
RenderMathMLRow::layoutRowItems(baseAscent, baseDescent);
m_baseWidth = logicalWidth();
} else {
getBase().layoutIfNeeded();
m_baseWidth = getBase().logicalWidth();
baseAscent = ascentForChild(getBase());
baseDescent = getBase().logicalHeight() - baseAscent;
getIndex().layoutIfNeeded();
}
// Stretch the radical operator to cover the base height.
// We can then determine the metrics of the radical operator + the base.
m_radicalOperator.stretchTo(style(), baseAscent + baseDescent);
LayoutUnit radicalOperatorHeight = m_radicalOperator.ascent() + m_radicalOperator.descent();
LayoutUnit indexBottomRaise = m_degreeBottomRaisePercent * radicalOperatorHeight;
LayoutUnit radicalAscent = baseAscent + m_verticalGap + m_ruleThickness + m_extraAscender;
LayoutUnit radicalDescent = std::max<LayoutUnit>(baseDescent, radicalOperatorHeight + m_extraAscender - radicalAscent);
LayoutUnit descent = radicalDescent;
LayoutUnit ascent = radicalAscent;
// We set the logical width.
if (m_kind == SquareRoot)
setLogicalWidth(m_radicalOperator.width() + m_baseWidth);
else {
ASSERT(m_kind == RootWithIndex);
setLogicalWidth(m_kernBeforeDegree + getIndex().logicalWidth() + m_kernAfterDegree + m_radicalOperator.width() + m_baseWidth);
}
// For <mroot>, we update the metrics to take into account the index.
LayoutUnit indexAscent, indexDescent;
if (m_kind == RootWithIndex) {
indexAscent = ascentForChild(getIndex());
indexDescent = getIndex().logicalHeight() - indexAscent;
ascent = std::max<LayoutUnit>(radicalAscent, indexBottomRaise + indexDescent + indexAscent - descent);
}
// We set the final position of children.
m_radicalOperatorTop = ascent - radicalAscent + m_extraAscender;
LayoutUnit horizontalOffset = m_radicalOperator.width();
if (m_kind == RootWithIndex)
horizontalOffset += m_kernBeforeDegree + getIndex().logicalWidth() + m_kernAfterDegree;
LayoutPoint baseLocation(mirrorIfNeeded(horizontalOffset, m_baseWidth), ascent - baseAscent);
if (m_kind == SquareRoot) {
for (auto* child = firstChildBox(); child; child = child->nextSiblingBox())
child->setLocation(child->location() + baseLocation);
} else {
ASSERT(m_kind == RootWithIndex);
getBase().setLocation(baseLocation);
LayoutPoint indexLocation(mirrorIfNeeded(m_kernBeforeDegree, getIndex()), ascent + descent - indexBottomRaise - indexDescent - indexAscent);
getIndex().setLocation(indexLocation);
}
setLogicalHeight(ascent + descent);
clearNeedsLayout();
}
void LayoutSVGText::layout()
{
ASSERT(needsLayout());
LayoutAnalyzer::Scope analyzer(*this);
subtreeStyleDidChange();
bool updateCachedBoundariesInParents = false;
if (m_needsTransformUpdate) {
m_localTransform = toSVGTextElement(node())->calculateAnimatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
if (!everHadLayout()) {
// When laying out initially, collect all layout attributes, build the character data map,
// and propogate resulting SVGLayoutAttributes to all LayoutSVGInlineText children in the subtree.
ASSERT(m_layoutAttributes.isEmpty());
collectLayoutAttributes(this, m_layoutAttributes);
updateFontInAllDescendants(this);
m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(*this);
m_needsReordering = true;
m_needsTextMetricsUpdate = false;
m_needsPositioningValuesUpdate = false;
updateCachedBoundariesInParents = true;
} else if (m_needsPositioningValuesUpdate) {
// When the x/y/dx/dy/rotate lists change, recompute the layout attributes, and eventually
// update the on-screen font objects as well in all descendants.
if (m_needsTextMetricsUpdate) {
updateFontInAllDescendants(this);
m_needsTextMetricsUpdate = false;
}
m_layoutAttributesBuilder.buildLayoutAttributesForForSubtree(*this);
m_needsReordering = true;
m_needsPositioningValuesUpdate = false;
updateCachedBoundariesInParents = true;
} else if (m_needsTextMetricsUpdate || SVGLayoutSupport::findTreeRootObject(this)->isLayoutSizeChanged()) {
// If the root layout size changed (eg. window size changes) or the transform to the root
// context has changed then recompute the on-screen font size.
updateFontInAllDescendants(this, &m_layoutAttributesBuilder);
ASSERT(!m_needsReordering);
ASSERT(!m_needsPositioningValuesUpdate);
m_needsTextMetricsUpdate = false;
updateCachedBoundariesInParents = true;
}
checkLayoutAttributesConsistency(this, m_layoutAttributes);
// Reduced version of LayoutBlock::layoutBlock(), which only takes care of SVG text.
// All if branches that could cause early exit in LayoutBlocks layoutBlock() method are turned into assertions.
ASSERT(!isInline());
ASSERT(!simplifiedLayout());
ASSERT(!scrollsOverflow());
ASSERT(!hasControlClip());
ASSERT(!positionedObjects());
ASSERT(!isAnonymousBlock());
if (!firstChild())
setChildrenInline(true);
// FIXME: We need to find a way to only layout the child boxes, if needed.
FloatRect oldBoundaries = objectBoundingBox();
ASSERT(childrenInline());
rebuildFloatsFromIntruding();
LayoutUnit beforeEdge = borderBefore() + paddingBefore();
LayoutUnit afterEdge = borderAfter() + paddingAfter() + scrollbarLogicalHeight();
setLogicalHeight(beforeEdge);
LayoutState state(*this, locationOffset());
LayoutUnit paintInvalidationLogicalTop = 0;
LayoutUnit paintInvalidationLogicalBottom = 0;
layoutInlineChildren(true, paintInvalidationLogicalTop, paintInvalidationLogicalBottom, afterEdge);
if (m_needsReordering)
m_needsReordering = false;
// If we don't have any line boxes, then make sure the frame rect is still cleared.
if (!firstLineBox())
setFrameRect(LayoutRect());
m_overflow.clear();
addVisualEffectOverflow();
if (!updateCachedBoundariesInParents)
updateCachedBoundariesInParents = oldBoundaries != objectBoundingBox();
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(this);
// If our bounds changed, notify the parents.
if (updateCachedBoundariesInParents)
LayoutSVGBlock::setNeedsBoundariesUpdate();
clearNeedsLayout();
}