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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2001 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      6  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      7  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      8  * Copyright (C) 2011 Google Inc. All rights reserved.
      9  *
     10  * This library is free software; you can redistribute it and/or
     11  * modify it under the terms of the GNU Library General Public
     12  * License as published by the Free Software Foundation; either
     13  * version 2 of the License, or (at your option) any later version.
     14  *
     15  * This library is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     18  * Library General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU Library General Public License
     21  * along with this library; see the file COPYING.LIB.  If not, write to
     22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     23  * Boston, MA 02110-1301, USA.
     24  */
     25 
     26 #ifndef EventDispatcher_h
     27 #define EventDispatcher_h
     28 
     29 #include <wtf/Forward.h>
     30 #include <wtf/Vector.h>
     31 
     32 namespace WebCore {
     33 
     34 class Event;
     35 class EventContext;
     36 class EventDispatchMediator;
     37 class EventTarget;
     38 class FrameView;
     39 class Node;
     40 class PlatformKeyboardEvent;
     41 class PlatformMouseEvent;
     42 class PlatformWheelEvent;
     43 
     44 enum EventDispatchBehavior {
     45     RetargetEvent,
     46     StayInsideShadowDOM
     47 };
     48 
     49 class EventDispatcher {
     50 public:
     51     static bool dispatchEvent(Node*, const EventDispatchMediator&);
     52     static void dispatchScopedEvent(Node*, PassRefPtr<Event>);
     53 
     54     static void dispatchSimulatedClick(Node*, PassRefPtr<Event> underlyingEvent, bool sendMouseEvents, bool showPressedLook);
     55 
     56     bool dispatchEvent(PassRefPtr<Event>);
     57     PassRefPtr<EventTarget> adjustRelatedTarget(Event*, PassRefPtr<EventTarget>);
     58     Node* node() const;
     59 
     60 private:
     61     EventDispatcher(Node*);
     62 
     63     PassRefPtr<EventTarget> adjustToShadowBoundaries(PassRefPtr<Node> relatedTarget, const Vector<Node*> relatedTargetAncestors);
     64     EventDispatchBehavior determineDispatchBehavior(Event*);
     65     void ensureEventAncestors(Event*);
     66     const EventContext* topEventContext();
     67 
     68     Vector<EventContext> m_ancestors;
     69     RefPtr<Node> m_node;
     70     RefPtr<EventTarget> m_originalTarget;
     71     RefPtr<FrameView> m_view;
     72     bool m_ancestorsInitialized;
     73 };
     74 
     75 inline Node* EventDispatcher::node() const
     76 {
     77     return m_node.get();
     78 }
     79 
     80 }
     81 
     82 #endif
     83