void RenderNamedFlowThread::addRegionToNamedFlowThread(RenderRegion* renderRegion)
{
ASSERT(renderRegion);
ASSERT(!renderRegion->isValid());
if (renderRegion->parentNamedFlowThread())
addDependencyOnFlowThread(renderRegion->parentNamedFlowThread());
renderRegion->setIsValid(true);
addRegionToList(m_regionList, renderRegion);
}
void RenderNamedFlowThread::checkInvalidRegions()
{
Vector<RenderRegion*> newValidRegions;
for (RenderRegionList::iterator iter = m_invalidRegionList.begin(); iter != m_invalidRegionList.end(); ++iter) {
RenderRegion* region = *iter;
// The only reason a region would be invalid is because it has a parent flow thread.
ASSERT(!region->isValid() && region->parentNamedFlowThread());
if (region->parentNamedFlowThread()->dependsOn(this))
continue;
newValidRegions.append(region);
}
for (Vector<RenderRegion*>::iterator iter = newValidRegions.begin(); iter != newValidRegions.end(); ++iter) {
RenderRegion* region = *iter;
m_invalidRegionList.remove(region);
region->parentNamedFlowThread()->m_observerThreadsSet.remove(this);
region->setIsValid(true);
addDependencyOnFlowThread(region->parentNamedFlowThread());
addRegionToList(m_regionList, region);
}
if (!newValidRegions.isEmpty())
invalidateRegions();
if (m_observerThreadsSet.isEmpty())
return;
// Notify all the flow threads that were dependent on this flow.
// Create a copy of the list first. That's because observers might change the list when calling checkInvalidRegions.
Vector<RenderNamedFlowThread*> observers;
copyToVector(m_observerThreadsSet, observers);
for (size_t i = 0; i < observers.size(); ++i) {
RenderNamedFlowThread* flowThread = observers.at(i);
flowThread->checkInvalidRegions();
}
}
void RenderNamedFlowThread::addRegionToThread(RenderRegion* renderRegion)
{
ASSERT(renderRegion);
resetMarkForDestruction();
ASSERT(!renderRegion->isValid());
if (renderRegion->parentNamedFlowThread()) {
if (renderRegion->parentNamedFlowThread()->dependsOn(this)) {
// The order of invalid regions is irrelevant.
m_invalidRegionList.add(renderRegion);
// Register ourself to get a notification when the state changes.
renderRegion->parentNamedFlowThread()->m_observerThreadsSet.add(this);
return;
}
addDependencyOnFlowThread(renderRegion->parentNamedFlowThread());
}
renderRegion->setIsValid(true);
addRegionToList(m_regionList, renderRegion);
invalidateRegions();
}
