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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 "core/dom/SimulatedClickOptions.h"
     30 #include "platform/heap/Handle.h"
     31 #include "wtf/PassRefPtr.h"
     32 #include "wtf/RefPtr.h"
     33 
     34 namespace blink {
     35 
     36 class Event;
     37 class EventDispatchMediator;
     38 class FrameView;
     39 class Node;
     40 class NodeEventContext;
     41 class WindowEventContext;
     42 
     43 enum EventDispatchContinuation {
     44     ContinueDispatching,
     45     DoneDispatching
     46 };
     47 
     48 class EventDispatcher {
     49     STACK_ALLOCATED();
     50 public:
     51     static bool dispatchEvent(Node*, PassRefPtrWillBeRawPtr<EventDispatchMediator>);
     52     static void dispatchScopedEvent(Node*, PassRefPtrWillBeRawPtr<EventDispatchMediator>);
     53 
     54     static void dispatchSimulatedClick(Node*, Event* underlyingEvent, SimulatedClickMouseEventOptions);
     55 
     56     bool dispatch();
     57     Node* node() const { return m_node.get(); }
     58     Event* event() const { return m_event.get(); }
     59 
     60 private:
     61     EventDispatcher(Node*, PassRefPtrWillBeRawPtr<Event>);
     62     const NodeEventContext* topNodeEventContext();
     63 
     64     EventDispatchContinuation dispatchEventPreProcess(void*& preDispatchEventHandlerResult);
     65     EventDispatchContinuation dispatchEventAtCapturing(WindowEventContext&);
     66     EventDispatchContinuation dispatchEventAtTarget();
     67     void dispatchEventAtBubbling(WindowEventContext&);
     68     void dispatchEventPostProcess(void* preDispatchEventHandlerResult);
     69 
     70     RefPtrWillBeMember<Node> m_node;
     71     RefPtrWillBeMember<Event> m_event;
     72     RefPtr<FrameView> m_view;
     73 #if ENABLE(ASSERT)
     74     bool m_eventDispatched;
     75 #endif
     76 };
     77 
     78 }
     79 
     80 #endif
     81