LayoutPoint RenderBoxModelObject::adjustedPositionRelativeToOffsetParent(const LayoutPoint& startPoint) const
{
// If the element is the HTML body element or doesn't have a parent
// return 0 and stop this algorithm.
if (isBody() || !parent())
return LayoutPoint();
LayoutPoint referencePoint = startPoint;
referencePoint.move(parent()->columnOffset(referencePoint));
// If the offsetParent of the element is null, or is the HTML body element,
// return the distance between the canvas origin and the left border edge
// of the element and stop this algorithm.
Element* element = offsetParent();
if (!element)
return referencePoint;
if (const RenderBoxModelObject* offsetParent = element->renderBoxModelObject()) {
if (offsetParent->isBox() && !offsetParent->isBody())
referencePoint.move(-toRenderBox(offsetParent)->borderLeft(), -toRenderBox(offsetParent)->borderTop());
if (!isOutOfFlowPositioned() || flowThreadContainingBlock()) {
if (isRelPositioned())
referencePoint.move(relativePositionOffset());
RenderObject* current;
for (current = parent(); current != offsetParent && current->parent(); current = current->parent()) {
// FIXME: What are we supposed to do inside SVG content?
if (!isOutOfFlowPositioned()) {
if (current->isBox() && !current->isTableRow())
referencePoint.moveBy(toRenderBox(current)->topLeftLocation());
referencePoint.move(current->parent()->columnOffset(referencePoint));
}
}
if (offsetParent->isBox() && offsetParent->isBody() && !offsetParent->isPositioned())
referencePoint.moveBy(toRenderBox(offsetParent)->topLeftLocation());
}
}
return referencePoint;
}
void RenderMedia::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
LayoutSize oldSize = contentBoxRect().size();
RenderImage::layout();
RenderBox* controlsRenderer = toRenderBox(m_children.firstChild());
if (!controlsRenderer)
return;
bool controlsNeedLayout = controlsRenderer->needsLayout();
// If the region chain has changed we also need to relayout the controls to update the region box info.
// FIXME: We can do better once we compute region box info for RenderReplaced, not only for RenderBlock.
const RenderFlowThread* flowThread = flowThreadContainingBlock();
if (flowThread && !controlsNeedLayout) {
if (flowThread->pageLogicalSizeChanged())
controlsNeedLayout = true;
}
LayoutSize newSize = contentBoxRect().size();
if (newSize == oldSize && !controlsNeedLayout)
return;
// When calling layout() on a child node, a parent must either push a LayoutStateMaintainter, or
// instantiate LayoutStateDisabler. Since using a LayoutStateMaintainer is slightly more efficient,
// and this method will be called many times per second during playback, use a LayoutStateMaintainer:
LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
controlsRenderer->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
controlsRenderer->style()->setHeight(Length(newSize.height(), Fixed));
controlsRenderer->style()->setWidth(Length(newSize.width(), Fixed));
controlsRenderer->setNeedsLayout(true, MarkOnlyThis);
controlsRenderer->layout();
setChildNeedsLayout(false);
statePusher.pop();
}
void RenderRegion::computeOverflowFromFlowThread()
{
ASSERT(isValid());
LayoutRect layoutRect;
{
// When getting the overflow from the flow thread we need to temporarly reset the current flow thread because
// we're changing flows.
CurrentRenderFlowThreadMaintainer flowThreadMaintainer(m_flowThread);
layoutRect = layoutOverflowRectForBox(m_flowThread);
}
layoutRect.setLocation(contentBoxRect().location() + (layoutRect.location() - m_flowThreadPortionRect.location()));
// FIXME: Correctly adjust the layout overflow for writing modes.
addLayoutOverflow(layoutRect);
RenderFlowThread* enclosingRenderFlowThread = flowThreadContainingBlock();
if (enclosingRenderFlowThread)
enclosingRenderFlowThread->addRegionsLayoutOverflow(this, layoutRect);
updateLayerTransform();
updateScrollInfoAfterLayout();
}
