bool FrameView::needsLayout() const
{
RenderView* renderView = this->renderView();
return layoutPending()
|| (renderView && renderView->needsLayout())
|| isSubtreeLayout();
}
void FrameView::scheduleRelayoutOfSubtree(RenderObject* relayoutRoot)
{
ASSERT(m_frame->view() == this);
if (!m_frame->document()->isActive())
return;
RenderView* renderView = this->renderView();
if (renderView && renderView->needsLayout()) {
if (relayoutRoot)
relayoutRoot->markContainingBlocksForLayout(false);
return;
}
if (layoutPending() || !m_layoutSchedulingEnabled) {
if (m_layoutSubtreeRoot != relayoutRoot) {
if (isObjectAncestorContainerOf(m_layoutSubtreeRoot, relayoutRoot)) {
// Keep the current root
relayoutRoot->markContainingBlocksForLayout(false, m_layoutSubtreeRoot);
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
} else if (isSubtreeLayout() && isObjectAncestorContainerOf(relayoutRoot, m_layoutSubtreeRoot)) {
// Re-root at relayoutRoot
m_layoutSubtreeRoot->markContainingBlocksForLayout(false, relayoutRoot);
m_layoutSubtreeRoot = relayoutRoot;
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
} else {
// Just do a full relayout
if (isSubtreeLayout())
m_layoutSubtreeRoot->markContainingBlocksForLayout(false);
m_layoutSubtreeRoot = 0;
relayoutRoot->markContainingBlocksForLayout(false);
}
}
} else if (m_layoutSchedulingEnabled) {
m_layoutSubtreeRoot = relayoutRoot;
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
m_hasPendingLayout = true;
m_frame->document()->scheduleVisualUpdate();
}
}
RenderObject* FrameView::layoutRoot(bool onlyDuringLayout) const
{
return onlyDuringLayout && layoutPending() ? 0 : m_layoutSubtreeRoot;
}
Node* FrameView::layoutRoot() const
{
return layoutPending() ? 0 : d->layoutRoot.get();
}