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/*
* Copyright (C) 2011 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 "core/dom/NamedFlow.h"
#include "RuntimeEnabledFeatures.h"
#include "core/dom/NamedFlowCollection.h"
#include "core/dom/StaticNodeList.h"
#include "core/events/ThreadLocalEventNames.h"
#include "core/events/UIEvent.h"
#include "core/rendering/RenderNamedFlowFragment.h"
#include "core/rendering/RenderNamedFlowThread.h"
namespace WebCore {
NamedFlow::NamedFlow(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName)
: m_flowThreadName(flowThreadName)
, m_flowManager(manager)
, m_parentFlowThread(0)
{
ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled());
ScriptWrappable::init(this);
}
NamedFlow::~NamedFlow()
{
// The named flow is not "strong" referenced from anywhere at this time so it shouldn't be reused if the named flow is recreated.
m_flowManager->discardNamedFlow(this);
}
PassRefPtr<NamedFlow> NamedFlow::create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName)
{
return adoptRef(new NamedFlow(manager, flowThreadName));
}
const AtomicString& NamedFlow::name() const
{
return m_flowThreadName;
}
bool NamedFlow::overset() const
{
if (m_flowManager->document())
m_flowManager->document()->updateLayoutIgnorePendingStylesheets();
// The renderer may be destroyed or created after the style update.
// Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary.
return m_parentFlowThread ? m_parentFlowThread->overset() : true;
}
static inline bool inFlowThread(RenderObject* renderer, RenderNamedFlowThread* flowThread)
{
if (!renderer)
return false;
RenderFlowThread* currentFlowThread = renderer->flowThreadContainingBlock();
if (flowThread == currentFlowThread)
return true;
if (renderer->flowThreadState() != RenderObject::InsideInFlowThread)
return false;
// An in-flow flow thread can be nested inside an out-of-flow one, so we have to recur up to check.
return inFlowThread(currentFlowThread->containingBlock(), flowThread);
}
int NamedFlow::firstEmptyRegionIndex() const
{
if (m_flowManager->document())
m_flowManager->document()->updateLayoutIgnorePendingStylesheets();
if (!m_parentFlowThread)
return -1;
const RenderRegionList& regionList = m_parentFlowThread->renderRegionList();
if (regionList.isEmpty())
return -1;
int countNonPseudoRegions = -1;
RenderRegionList::const_iterator iter = regionList.begin();
for (int index = 0; iter != regionList.end(); ++index, ++iter) {
const RenderNamedFlowFragment* renderRegion = toRenderNamedFlowFragment(*iter);
// FIXME: Pseudo-elements are not included in the list.
// They will be included when we will properly support the Region interface
// http://dev.w3.org/csswg/css-regions/#the-region-interface
if (!renderRegion->isElementBasedRegion())
continue;
countNonPseudoRegions++;
if (renderRegion->regionOversetState() == RegionEmpty)
return countNonPseudoRegions;
}
return -1;
}
PassRefPtr<NodeList> NamedFlow::getRegionsByContent(Node* contentNode)
{
Vector<RefPtr<Node> > regionNodes;
if (!contentNode)
return StaticNodeList::adopt(regionNodes);
if (m_flowManager->document())
m_flowManager->document()->updateLayoutIgnorePendingStylesheets();
// The renderer may be destroyed or created after the style update.
// Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary.
if (!m_parentFlowThread)
return StaticNodeList::adopt(regionNodes);
if (inFlowThread(contentNode->renderer(), m_parentFlowThread)) {
const RenderRegionList& regionList = m_parentFlowThread->renderRegionList();
for (RenderRegionList::const_iterator iter = regionList.begin(); iter != regionList.end(); ++iter) {
const RenderNamedFlowFragment* renderRegion = toRenderNamedFlowFragment(*iter);
// They will be included when we will properly support the Region interface
// http://dev.w3.org/csswg/css-regions/#the-region-interface
if (!renderRegion->isElementBasedRegion())
continue;
if (m_parentFlowThread->objectInFlowRegion(contentNode->renderer(), renderRegion))
regionNodes.append(renderRegion->nodeForRegion());
}
}
return StaticNodeList::adopt(regionNodes);
}
PassRefPtr<NodeList> NamedFlow::getRegions()
{
Vector<RefPtr<Node> > regionNodes;
if (m_flowManager->document())
m_flowManager->document()->updateLayoutIgnorePendingStylesheets();
// The renderer may be destroyed or created after the style update.
// Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary.
if (!m_parentFlowThread)
return StaticNodeList::adopt(regionNodes);
const RenderRegionList& regionList = m_parentFlowThread->renderRegionList();
for (RenderRegionList::const_iterator iter = regionList.begin(); iter != regionList.end(); ++iter) {
const RenderNamedFlowFragment* renderRegion = toRenderNamedFlowFragment(*iter);
// They will be included when we will properly support the Region interface
// http://dev.w3.org/csswg/css-regions/#the-region-interface
if (!renderRegion->isElementBasedRegion())
continue;
regionNodes.append(renderRegion->nodeForRegion());
}
return StaticNodeList::adopt(regionNodes);
}
PassRefPtr<NodeList> NamedFlow::getContent()
{
Vector<RefPtr<Node> > contentNodes;
if (m_flowManager->document())
m_flowManager->document()->updateLayoutIgnorePendingStylesheets();
// The renderer may be destroyed or created after the style update.
// Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary.
if (!m_parentFlowThread)
return StaticNodeList::adopt(contentNodes);
const NamedFlowContentNodes& contentNodesList = m_parentFlowThread->contentNodes();
for (NamedFlowContentNodes::const_iterator it = contentNodesList.begin(); it != contentNodesList.end(); ++it) {
Node* node = *it;
ASSERT(node->computedStyle()->flowThread() == m_parentFlowThread->flowThreadName());
contentNodes.append(node);
}
return StaticNodeList::adopt(contentNodes);
}
void NamedFlow::setRenderer(RenderNamedFlowThread* parentFlowThread)
{
// The named flow can either go from a no_renderer->renderer or renderer->no_renderer state; anything else could indicate a bug.
ASSERT((!m_parentFlowThread && parentFlowThread) || (m_parentFlowThread && !parentFlowThread));
// If parentFlowThread is 0, the flow thread will move in the "NULL" state.
m_parentFlowThread = parentFlowThread;
}
void NamedFlow::dispatchRegionLayoutUpdateEvent()
{
ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
// If the flow is in the "NULL" state the event should not be dispatched any more.
if (flowState() == FlowStateNull)
return;
RefPtr<Event> event = UIEvent::create(EventTypeNames::webkitregionlayoutupdate, false, false, m_flowManager->document()->domWindow(), 0);
dispatchEvent(event);
}
void NamedFlow::dispatchRegionOversetChangeEvent()
{
ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
// If the flow is in the "NULL" state the event should not be dispatched any more.
if (flowState() == FlowStateNull)
return;
RefPtr<Event> event = UIEvent::create(EventTypeNames::webkitregionoversetchange, false, false, m_flowManager->document()->domWindow(), 0);
dispatchEvent(event);
}
const AtomicString& NamedFlow::interfaceName() const
{
return EventTargetNames::NamedFlow;
}
ExecutionContext* NamedFlow::executionContext() const
{
return m_flowManager->document();
}
Node* NamedFlow::ownerNode() const
{
return m_flowManager->document();
}
} // namespace WebCore
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