void FlowThreadController::resetFlowThreadsWithAutoHeightRegions()
{
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
if (flowRenderer->hasAutoLogicalHeightRegions()) {
flowRenderer->markAutoLogicalHeightRegionsForLayout();
flowRenderer->invalidateRegions();
}
}
}
void FlowThreadController::updateFlowThreadsIntoConstrainedPhase()
{
// Walk the flow chain in reverse order to update the auto-height regions and compute correct sizes for the containing regions. Only after this we can
// set the flow in the constrained layout phase.
for (RenderNamedFlowThreadList::reverse_iterator iter = m_renderNamedFlowThreadList->rbegin(); iter != m_renderNamedFlowThreadList->rend(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
ASSERT(!flowRenderer->hasRegions() || flowRenderer->hasValidRegionInfo());
flowRenderer->layoutIfNeeded();
if (flowRenderer->hasAutoLogicalHeightRegions()) {
ASSERT(flowRenderer->needsTwoPhasesLayout());
flowRenderer->markAutoLogicalHeightRegionsForLayout();
}
flowRenderer->setInConstrainedLayoutPhase(true);
flowRenderer->clearNeedsTwoPhasesLayout();
}
}
bool FlowThreadController::updateFlowThreadsNeedingLayout()
{
bool needsTwoPassLayout = false;
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
ASSERT(!flowRenderer->needsTwoPhasesLayout());
flowRenderer->setInConstrainedLayoutPhase(false);
if (flowRenderer->needsLayout() && flowRenderer->hasAutoLogicalHeightRegions())
needsTwoPassLayout = true;
}
if (needsTwoPassLayout)
resetFlowThreadsWithAutoHeightRegions();
return needsTwoPassLayout;
}
bool FlowThreadController::updateFlowThreadsNeedingLayout()
{
bool needsTwoPassLayout = false;
for (auto iter = m_renderNamedFlowThreadList->begin(), end = m_renderNamedFlowThreadList->end(); iter != end; ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
ASSERT(!flowRenderer->needsTwoPhasesLayout());
ASSERT(flowRenderer->inMeasureContentLayoutPhase());
if (flowRenderer->needsLayout() && flowRenderer->hasAutoLogicalHeightRegions())
needsTwoPassLayout = true;
}
if (needsTwoPassLayout)
resetFlowThreadsWithAutoHeightRegions();
return needsTwoPassLayout;
}