void RenderView::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
if (!document()->paginated())
setPageLogicalHeight(0);
if (shouldUsePrintingLayout())
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = logicalWidth();
// Use calcWidth/Height to get the new width/height, since this will take the full page zoom factor into account.
bool relayoutChildren = !shouldUsePrintingLayout() && (!m_frameView || width() != viewWidth() || height() != viewHeight());
if (relayoutChildren) {
setChildNeedsLayout(true, MarkOnlyThis);
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
|| child->style()->logicalHeight().isPercent()
|| child->style()->logicalMinHeight().isPercent()
|| child->style()->logicalMaxHeight().isPercent())
child->setChildNeedsLayout(true, MarkOnlyThis);
}
}
ASSERT(!m_layoutState);
if (!needsLayout())
return;
LayoutState state;
// FIXME: May be better to push a clip and avoid issuing offscreen repaints.
state.m_clipped = false;
state.m_pageLogicalHeight = m_pageLogicalHeight;
state.m_pageLogicalHeightChanged = m_pageLogicalHeightChanged;
state.m_isPaginated = state.m_pageLogicalHeight;
m_pageLogicalHeightChanged = false;
m_layoutState = &state;
m_layoutPhase = RenderViewNormalLayout;
bool needsTwoPassLayoutForAutoLogicalHeightRegions = hasRenderNamedFlowThreads()
&& flowThreadController()->hasAutoLogicalHeightRegions()
&& flowThreadController()->hasRenderNamedFlowThreadsNeedingLayout();
if (needsTwoPassLayoutForAutoLogicalHeightRegions)
flowThreadController()->resetRegionsOverrideLogicalContentHeight();
layoutContent(state);
if (needsTwoPassLayoutForAutoLogicalHeightRegions) {
m_layoutPhase = ConstrainedFlowThreadsLayoutInAutoLogicalHeightRegions;
flowThreadController()->markAutoLogicalHeightRegionsForLayout();
layoutContent(state);
}
#ifndef NDEBUG
checkLayoutState(state);
#endif
m_layoutState = 0;
setNeedsLayout(false);
}
bool FlowThreadController::isAutoLogicalHeightRegionsCountConsistent() const
{
if (!hasRenderNamedFlowThreads())
return !hasFlowThreadsWithAutoLogicalHeightRegions();
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
if (!(*iter)->isAutoLogicalHeightRegionsCountConsistent())
return false;
}
return true;
}
void RenderView::layoutContent(const LayoutState& state)
{
UNUSED_PARAM(state);
ASSERT(needsLayout());
RenderBlock::layout();
if (hasRenderNamedFlowThreads())
flowThreadController()->layoutRenderNamedFlowThreads();
#ifndef NDEBUG
checkLayoutState(state);
#endif
}
bool FlowThreadController::isAutoLogicalHeightRegionsFlagConsistent() const
{
if (!hasRenderNamedFlowThreads())
return !hasAutoLogicalHeightRegions();
// Count the number of auto height regions
unsigned autoLogicalHeightRegions = 0;
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
autoLogicalHeightRegions += flowRenderer->autoLogicalHeightRegionsCount();
}
return autoLogicalHeightRegions == m_autoLogicalHeightRegionsCount;
}
void RenderView::layout()
{
if (!document()->paginated())
setPageLogicalHeight(0);
if (shouldUsePrintingLayout())
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = logicalWidth();
// Use calcWidth/Height to get the new width/height, since this will take the full page zoom factor into account.
bool relayoutChildren = !shouldUsePrintingLayout() && (!m_frameView || width() != viewWidth() || height() != viewHeight());
if (relayoutChildren) {
setChildNeedsLayout(true, MarkOnlyThis);
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
|| child->style()->logicalHeight().isPercent()
|| child->style()->logicalMinHeight().isPercent()
|| child->style()->logicalMaxHeight().isPercent())
child->setChildNeedsLayout(true, MarkOnlyThis);
}
}
ASSERT(!m_layoutState);
LayoutState state;
// FIXME: May be better to push a clip and avoid issuing offscreen repaints.
state.m_clipped = false;
state.m_pageLogicalHeight = m_pageLogicalHeight;
state.m_pageLogicalHeightChanged = m_pageLogicalHeightChanged;
state.m_isPaginated = state.m_pageLogicalHeight;
m_pageLogicalHeightChanged = false;
m_layoutState = &state;
if (needsLayout()) {
RenderBlock::layout();
if (hasRenderNamedFlowThreads())
flowThreadController()->layoutRenderNamedFlowThreads();
}
ASSERT(layoutDelta() == LayoutSize());
ASSERT(m_layoutStateDisableCount == 0);
ASSERT(m_layoutState == &state);
m_layoutState = 0;
setNeedsLayout(false);
}
void RenderView::layoutContentToComputeOverflowInRegions(const LayoutState& state)
{
if (!hasRenderNamedFlowThreads())
return;
// First pass through the flow threads and mark the regions as needing a simple layout.
// The regions extract the overflow from the flow thread and pass it to their containg
// block chain.
flowThreadController().updateFlowThreadsIntoOverflowPhase();
if (needsLayout())
layoutContent(state);
// In case scrollbars resized the regions a new pass is necessary to update the flow threads
// and recompute the overflow on regions. This is the final state of the flow threads.
flowThreadController().updateFlowThreadsIntoFinalPhase();
if (needsLayout())
layoutContent(state);
// Finally reset the layout state of the flow threads.
flowThreadController().updateFlowThreadsIntoMeasureContentPhase();
}
void RenderView::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlock::styleDidChange(diff, oldStyle);
if (hasRenderNamedFlowThreads())
flowThreadController()->styleDidChange();
}
bool RenderView::checkTwoPassLayoutForAutoHeightRegions() const
{
return hasRenderNamedFlowThreads() && m_flowThreadController->hasFlowThreadsWithAutoLogicalHeightRegions();
}
