Support an Event Path API

Source/core/dom/Event.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/dom/Event.h"
 
 #include "core/dom/EventDispatcher.h"
 #include "core/dom/EventNames.h"
 #include "core/dom/EventTarget.h"
+#include "core/dom/StaticNodeList.h"
 #include "core/dom/UserGestureIndicator.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include <wtf/CurrentTime.h>
 #include <wtf/text/AtomicString.h>
 
 namespace WebCore {
 
 EventInit::EventInit()
     : bubbles(false)
     , cancelable(false)
@@ skipping 155 matching lines @@
 
 void Event::setUnderlyingEvent(PassRefPtr<Event> ue)
 {
     // Prohibit creation of a cycle -- just do nothing in that case.
     for (Event* e = ue.get(); e; e = e->underlyingEvent())
         if (e == this)
             return;
     m_underlyingEvent = ue;
 }
 
+PassRefPtr<NodeList> Event::path() const
+{
+    if (!m_currentTarget || !m_currentTarget->toNode())
+        return StaticNodeList::createEmpty();
+    Node* currentTarget = m_currentTarget->toNode();
+    Vector<RefPtr<Node> > nodes;
+    size_t eventPathSize = m_eventPath.size();
+    for (size_t i = 0; i < eventPathSize; ++i) {
+        Node* node = m_eventPath[i]->node();
+        if (currentTarget->canReach(node))
+            nodes.append(node);
+    }
+    return StaticNodeList::adopt(nodes);
+}
+
 } // namespace WebCore