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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#include "FlowThreadController.h"
#include "NamedFlowCollection.h"
#include "RenderFlowThread.h"
#include "RenderNamedFlowThread.h"
#include "StyleInheritedData.h"
#include "WebKitNamedFlow.h"
#include <wtf/text/AtomicString.h>
namespace WebCore {
PassOwnPtr<FlowThreadController> FlowThreadController::create(RenderView* view)
{
return adoptPtr(new FlowThreadController(view));
}
FlowThreadController::FlowThreadController(RenderView* view)
: m_view(view)
, m_currentRenderFlowThread(0)
, m_isRenderNamedFlowThreadOrderDirty(false)
, m_flowThreadsWithAutoLogicalHeightRegions(0)
{
}
FlowThreadController::~FlowThreadController()
{
}
RenderNamedFlowThread* FlowThreadController::ensureRenderFlowThreadWithName(const AtomicString& name)
{
if (!m_renderNamedFlowThreadList)
m_renderNamedFlowThreadList = adoptPtr(new RenderNamedFlowThreadList());
else {
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
if (flowRenderer->flowThreadName() == name)
return flowRenderer;
}
}
NamedFlowCollection* namedFlows = m_view->document()->namedFlows();
// Sanity check for the absence of a named flow in the "CREATED" state with the same name.
ASSERT(!namedFlows->flowByName(name));
RenderNamedFlowThread* flowRenderer = RenderNamedFlowThread::createAnonymous(m_view->document(), namedFlows->ensureFlowWithName(name));
flowRenderer->setStyle(RenderFlowThread::createFlowThreadStyle(m_view->style()));
m_renderNamedFlowThreadList->add(flowRenderer);
// Keep the flow renderer as a child of RenderView.
m_view->addChild(flowRenderer);
setIsRenderNamedFlowThreadOrderDirty(true);
return flowRenderer;
}
void FlowThreadController::styleDidChange()
{
RenderStyle* viewStyle = m_view->style();
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
flowRenderer->setStyle(RenderFlowThread::createFlowThreadStyle(viewStyle));
}
}
void FlowThreadController::layoutRenderNamedFlowThreads()
{
updateFlowThreadsChainIfNecessary();
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
flowRenderer->layoutIfNeeded();
}
}
void FlowThreadController::registerNamedFlowContentNode(Node* contentNode, RenderNamedFlowThread* namedFlow)
{
ASSERT(contentNode && contentNode->isElementNode());
ASSERT(namedFlow);
ASSERT(!m_mapNamedFlowContentNodes.contains(contentNode));
ASSERT(!namedFlow->hasContentNode(contentNode));
m_mapNamedFlowContentNodes.add(contentNode, namedFlow);
namedFlow->registerNamedFlowContentNode(contentNode);
}
void FlowThreadController::unregisterNamedFlowContentNode(Node* contentNode)
{
ASSERT(contentNode && contentNode->isElementNode());
HashMap<const Node*, RenderNamedFlowThread*>::iterator it = m_mapNamedFlowContentNodes.find(contentNode);
ASSERT(it != m_mapNamedFlowContentNodes.end());
ASSERT(it->value);
ASSERT(it->value->hasContentNode(contentNode));
it->value->unregisterNamedFlowContentNode(contentNode);
m_mapNamedFlowContentNodes.remove(contentNode);
}
void FlowThreadController::updateFlowThreadsChainIfNecessary()
{
ASSERT(m_renderNamedFlowThreadList);
ASSERT(isAutoLogicalHeightRegionsCountConsistent());
// Remove the left-over flow threads.
RenderNamedFlowThreadList toRemoveList;
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
if (flowRenderer->isMarkedForDestruction())
toRemoveList.add(flowRenderer);
}
if (toRemoveList.size() > 0)
setIsRenderNamedFlowThreadOrderDirty(true);
for (RenderNamedFlowThreadList::iterator iter = toRemoveList.begin(); iter != toRemoveList.end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
m_renderNamedFlowThreadList->remove(flowRenderer);
flowRenderer->destroy();
}
if (isRenderNamedFlowThreadOrderDirty()) {
// Arrange the thread list according to dependencies.
RenderNamedFlowThreadList sortedList;
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
if (sortedList.contains(flowRenderer))
continue;
flowRenderer->pushDependencies(sortedList);
sortedList.add(flowRenderer);
}
m_renderNamedFlowThreadList->swap(sortedList);
setIsRenderNamedFlowThreadOrderDirty(false);
}
}
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::updateFlowThreadsNeedingTwoStepLayout()
{
bool needsTwoPassLayout = false;
for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
RenderNamedFlowThread* flowRenderer = *iter;
if (flowRenderer->needsTwoPhasesLayout()) {
needsTwoPassLayout = true;
break;
}
}
if (needsTwoPassLayout)
resetFlowThreadsWithAutoHeightRegions();
return needsTwoPassLayout;
}
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::isContentNodeRegisteredWithAnyNamedFlow(const Node* contentNode) const
{
return m_mapNamedFlowContentNodes.contains(contentNode);
}
#ifndef NDEBUG
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;
}
#endif
} // namespace WebCore
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