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      1 /*
      2  * Copyright (C) 2012 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  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef DOMRequestState_h
     27 #define DOMRequestState_h
     28 
     29 #include "bindings/v8/DOMWrapperWorld.h"
     30 #include "bindings/v8/V8Binding.h"
     31 #include "core/dom/ExecutionContext.h"
     32 #include "v8.h"
     33 #include "wtf/RefPtr.h"
     34 
     35 namespace WebCore {
     36 
     37 class DOMRequestState {
     38 public:
     39     explicit DOMRequestState(ExecutionContext* executionContext)
     40         : m_executionContext(executionContext)
     41         , m_world(DOMWrapperWorld::current())
     42         , m_isolate(toIsolate(executionContext))
     43     {
     44         ASSERT(m_executionContext);
     45     }
     46 
     47     void clear()
     48     {
     49         m_executionContext = 0;
     50         m_world.clear();
     51     }
     52 
     53     class Scope {
     54     public:
     55         explicit Scope(DOMRequestState& state)
     56             : m_handleScope(state.isolate())
     57             , m_contextScope(state.context())
     58         {
     59         }
     60     private:
     61         v8::HandleScope m_handleScope;
     62         v8::Context::Scope m_contextScope;
     63     };
     64 
     65     v8::Local<v8::Context> context()
     66     {
     67         ASSERT(m_executionContext);
     68         return toV8Context(m_executionContext, m_world.get());
     69     }
     70 
     71     v8::Isolate* isolate() const
     72     {
     73         return m_isolate;
     74     }
     75 
     76     bool isValid() const { return m_executionContext; }
     77 
     78 private:
     79     ExecutionContext* m_executionContext;
     80     RefPtr<DOMWrapperWorld> m_world;
     81     v8::Isolate* m_isolate;
     82 };
     83 
     84 }
     85 #endif
     86