// During the normal layout phase of the named flow the regions are initialized with a height equal to their max-height.
// This way unforced breaks are automatically placed when a region is full and the content height/position correctly estimated.
// Also, the region where a forced break falls is exactly the region found at the forced break offset inside the flow content.
void RenderFlowThread::initializeRegionsOverrideLogicalContentHeight(RenderRegion* startRegion)
{
ASSERT(view()->normalLayoutPhase());
if (!hasAutoLogicalHeightRegions())
return;
RenderRegionList::iterator regionIter = startRegion ? m_regionList.find(startRegion) : m_regionList.begin();
for (; regionIter != m_regionList.end(); ++regionIter) {
RenderRegion* region = *regionIter;
if (region->hasAutoLogicalHeight())
region->setOverrideLogicalContentHeight(region->maxPageLogicalHeight());
}
}
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 RenderFlowThread::markAutoLogicalHeightRegionsForLayout()
{
ASSERT(view()->layoutState());
ASSERT(view()->constrainedFlowThreadsLayoutPhase());
if (!hasAutoLogicalHeightRegions())
return;
for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) {
RenderRegion* region = *iter;
if (!region->hasAutoLogicalHeight())
continue;
// FIXME: We need to find a way to avoid marking all the regions ancestors for layout
// as we are already inside layout.
region->setNeedsLayout(true);
}
invalidateRegions();
}
void RenderFlowThread::resetRegionsOverrideLogicalContentHeight()
{
ASSERT(view()->layoutState());
ASSERT(view()->normalLayoutPhase());
if (!hasAutoLogicalHeightRegions())
return;
for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) {
RenderRegion* region = *iter;
if (!region->hasAutoLogicalHeight())
continue;
region->clearOverrideLogicalContentHeight();
// FIXME: We need to find a way to avoid marking all the regions ancestors for layout
// as we are already inside layout.
region->setNeedsLayout(true);
}
// Make sure we don't skip any region breaks when we do the layout again.
// Using m_regionsInvalidated to force all the RenderFlowThread children do the layout again.
invalidateRegions();
}
