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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* OWNER OR CONTRIBUTORS 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/EventPathWalker.h"
#include "core/dom/shadow/ContentDistributor.h"
#include "core/dom/shadow/InsertionPoint.h"
#include "core/dom/shadow/ShadowRoot.h"
namespace WebCore {
EventPathWalker::EventPathWalker(const Node* node)
: m_node(node)
, m_distributedNode(node)
, m_isVisitingInsertionPointInReprojection(false)
{
ASSERT(node);
// FIXME: It's not clear if we need this document check, but I think we do
// since DocType nodes from document.implementation.createDocumentType
// don't have a document().
if (Document* document = node->document())
document->updateDistributionForNodeIfNeeded(const_cast<Node*>(node));
}
Node* EventPathWalker::parent(const Node* node)
{
EventPathWalker walker(node);
walker.moveToParent();
return walker.node();
}
void EventPathWalker::moveToParent()
{
ASSERT(m_node);
ASSERT(m_distributedNode);
if (ElementShadow* shadow = shadowOfParent(m_node)) {
if (InsertionPoint* insertionPoint = shadow->distributor().findInsertionPointFor(m_distributedNode)) {
m_node = insertionPoint;
m_isVisitingInsertionPointInReprojection = true;
return;
}
}
if (!m_node->isShadowRoot()) {
m_node = m_node->parentNode();
if (!(m_node && m_node->isShadowRoot() && toShadowRoot(m_node)->insertionPoint()))
m_distributedNode = m_node;
m_isVisitingInsertionPointInReprojection = false;
return;
}
const ShadowRoot* shadowRoot = toShadowRoot(m_node);
if (InsertionPoint* insertionPoint = shadowRoot->insertionPoint()) {
m_node = insertionPoint;
m_isVisitingInsertionPointInReprojection = true;
return;
}
m_node = shadowRoot->host();
m_distributedNode = m_node;
m_isVisitingInsertionPointInReprojection = false;
}
} // namespace
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