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      1 /*
      2  * Copyright (C) 2014 Google Inc. All Rights Reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  *
     25  */
     26 
     27 #ifndef NodeEventContext_h
     28 #define NodeEventContext_h
     29 
     30 #include "core/events/TreeScopeEventContext.h"
     31 #include "wtf/PassRefPtr.h"
     32 #include "wtf/RefPtr.h"
     33 
     34 namespace blink {
     35 
     36 class EventTarget;
     37 class Node;
     38 class TouchEventContext;
     39 
     40 class NodeEventContext {
     41     ALLOW_ONLY_INLINE_ALLOCATION();
     42     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NodeEventContext);
     43 public:
     44     // FIXME: Use ContainerNode instead of Node.
     45     NodeEventContext(PassRefPtrWillBeRawPtr<Node>, PassRefPtrWillBeRawPtr<EventTarget> currentTarget);
     46     void trace(Visitor*);
     47 
     48     Node* node() const { return m_node.get(); }
     49 
     50     void setTreeScopeEventContext(PassRefPtrWillBeRawPtr<TreeScopeEventContext> prpTreeScopeEventContext) { m_treeScopeEventContext = prpTreeScopeEventContext; }
     51     TreeScopeEventContext& treeScopeEventContext() { ASSERT(m_treeScopeEventContext); return *m_treeScopeEventContext; }
     52 
     53     EventTarget* target() const { return m_treeScopeEventContext->target(); }
     54     EventTarget* relatedTarget() const { return m_treeScopeEventContext->relatedTarget(); }
     55     TouchEventContext* touchEventContext() const { return m_treeScopeEventContext->touchEventContext(); }
     56 
     57     bool currentTargetSameAsTarget() const { return m_currentTarget.get() == target(); }
     58     void handleLocalEvents(Event*) const;
     59 
     60 private:
     61     RefPtrWillBeMember<Node> m_node;
     62     RefPtrWillBeMember<EventTarget> m_currentTarget;
     63     RefPtrWillBeMember<TreeScopeEventContext> m_treeScopeEventContext;
     64 };
     65 
     66 } // namespace blink
     67 
     68 #if !ENABLE(OILPAN)
     69 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::NodeEventContext);
     70 #else
     71 namespace WTF {
     72 template <> struct VectorTraits<blink::NodeEventContext> : SimpleClassVectorTraits<blink::NodeEventContext> {
     73     static const bool needsDestruction = false;
     74 };
     75 }
     76 #endif
     77 
     78 #endif // NodeEventContext_h
     79