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/*
* Copyright (C) 009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WorkerContextExecutionProxy_h
#define WorkerContextExecutionProxy_h
#if ENABLE(WORKERS)
#include <list>
#include "v8.h"
#include "v8_index.h"
#include <wtf/HashSet.h>
namespace WebCore {
class Event;
class EventTarget;
class V8EventListener;
class WorkerContext;
class WorkerContextExecutionProxy {
public:
WorkerContextExecutionProxy(WorkerContext*);
~WorkerContextExecutionProxy();
// Returns a local handle of the context.
v8::Local<v8::Context> GetContext() { return v8::Local<v8::Context>::New(m_context); }
// Returns the dom constructor function for the given node type.
v8::Local<v8::Function> GetConstructor(V8ClassIndex::V8WrapperType);
// Finds or creates an event listener;
PassRefPtr<V8EventListener> FindOrCreateEventListener(v8::Local<v8::Value> listener, bool isInline, bool findOnly);
// Removes an event listener;
void RemoveEventListener(V8EventListener*);
// Track the event so that we can detach it from the JS wrapper when a worker
// terminates. This is needed because we need to be able to dispose these
// events and releases references to their event targets: WorkerContext.
void TrackEvent(Event*);
// Evaluate a script file in the current execution environment.
v8::Local<v8::Value> evaluate(const String& str, const String& fileName, int baseLine);
// Returns WorkerContext object.
WorkerContext* workerContext() { return m_workerContext; }
// Returns WorkerContextExecutionProxy object of the currently executing context.
static WorkerContextExecutionProxy* retrieve();
// Returns the JS wrapper of object.
static v8::Handle<v8::Value> ToV8Object(V8ClassIndex::V8WrapperType type, void* impl);
static v8::Handle<v8::Value> EventToV8Object(Event* event);
static v8::Handle<v8::Value> EventTargetToV8Object(EventTarget* target);
static v8::Handle<v8::Value> WorkerContextToV8Object(WorkerContext* wc);
// Enables HTML5 worker support.
static void enableWebWorkers(bool);
static bool isWebWorkersEnabled();
private:
void initContextIfNeeded();
void dispose();
// Run an already compiled script.
v8::Local<v8::Value> runScript(v8::Handle<v8::Script>);
static v8::Local<v8::Object> instantiateV8Object(V8ClassIndex::V8WrapperType descType, V8ClassIndex::V8WrapperType cptrType, void* impl);
static bool forgetV8EventObject(Event*);
WorkerContext* m_workerContext;
v8::Persistent<v8::Context> m_context;
int m_recursion;
typedef std::list<V8EventListener*> EventListenerList;
EventListenerList m_listeners;
typedef HashSet<Event*> EventSet;
EventSet m_events;
};
} // namespace WebCore
#endif // ENABLE(WORKERS)
#endif // WorkerContextExecutionProxy_h
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