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/*
* Copyright (C) 2013 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 ScriptPromiseResolver_h
#define ScriptPromiseResolver_h
#include "bindings/v8/DOMWrapperWorld.h"
#include "bindings/v8/ScopedPersistent.h"
#include "bindings/v8/ScriptObject.h"
#include "bindings/v8/ScriptPromise.h"
#include "bindings/v8/ScriptState.h"
#include "bindings/v8/ScriptValue.h"
#include "bindings/v8/V8Binding.h"
#include "wtf/RefPtr.h"
#include <v8.h>
namespace WebCore {
class ExecutionContext;
// ScriptPromiseResolver is a class for performing operations on Promise
// (resolve / reject) from C++ world.
// ScriptPromiseResolver holds a PromiseResolver.
// Here is a typical usage:
// 1. Create a ScriptPromiseResolver from a ScriptPromise.
// 2. Pass the promise object of the holder to a JavaScript program
// (such as XMLHttpRequest return value).
// 3. Call resolve or reject when the operation completes or
// the operation fails respectively.
//
// Most methods including constructors must be called within a v8 context.
// To use ScriptPromiseResolver out of a v8 context the caller must
// enter a v8 context, for example by using ScriptScope and ScriptState.
//
// To prevent memory leaks, you should release the reference manually
// by calling resolve or reject.
// Destroying the object will also release the reference.
//
class ScriptPromiseResolver : public RefCounted<ScriptPromiseResolver> {
WTF_MAKE_NONCOPYABLE(ScriptPromiseResolver);
public:
static PassRefPtr<ScriptPromiseResolver> create(ScriptPromise, ExecutionContext*);
static PassRefPtr<ScriptPromiseResolver> create(ScriptPromise);
// A ScriptPromiseResolver should be resolved / rejected before
// its destruction.
// A ScriptPromiseResolver can be destructed safely without
// entering a v8 context.
~ScriptPromiseResolver();
// Return true if the promise object is in pending state.
bool isPending() const;
ScriptPromise promise()
{
ASSERT(m_promise.isolate()->InContext());
return m_promise;
}
// To use following template methods, T must be a DOM class.
// This method will be implemented by the code generator.
template<typename T>
void resolve(T* value, v8::Handle<v8::Object> creationContext) { resolve(toV8NoInline(value, creationContext, m_isolate)); }
template<typename T>
void reject(T* value, v8::Handle<v8::Object> creationContext) { reject(toV8NoInline(value, creationContext, m_isolate)); }
template<typename T>
void resolve(PassRefPtr<T> value, v8::Handle<v8::Object> creationContext) { resolve(value.get(), creationContext); }
template<typename T>
void reject(PassRefPtr<T> value, v8::Handle<v8::Object> creationContext) { reject(value.get(), creationContext); }
template<typename T>
inline void resolve(T* value, ExecutionContext*);
template<typename T>
inline void reject(T* value, ExecutionContext*);
template<typename T>
void resolve(PassRefPtr<T> value, ExecutionContext* context) { resolve(value.get(), context); }
template<typename T>
void reject(PassRefPtr<T> value, ExecutionContext* context) { reject(value.get(), context); }
template<typename T>
inline void resolve(T* value);
template<typename T>
inline void reject(T* value);
template<typename T>
void resolve(PassRefPtr<T> value) { resolve(value.get()); }
template<typename T>
void reject(PassRefPtr<T> value) { reject(value.get()); }
void resolve(ScriptValue);
void reject(ScriptValue);
private:
ScriptPromiseResolver(ScriptPromise);
void resolve(v8::Handle<v8::Value>);
void reject(v8::Handle<v8::Value>);
v8::Isolate* m_isolate;
ScriptPromise m_promise;
};
template<typename T>
void ScriptPromiseResolver::resolve(T* value, ExecutionContext* context)
{
ASSERT(m_isolate->InContext());
v8::Handle<v8::Context> v8Context = toV8Context(context, DOMWrapperWorld::current());
resolve(value, v8Context->Global());
}
template<typename T>
void ScriptPromiseResolver::reject(T* value, ExecutionContext* context)
{
ASSERT(m_isolate->InContext());
v8::Handle<v8::Context> v8Context = toV8Context(context, DOMWrapperWorld::current());
reject(value, v8Context->Global());
}
template<typename T>
void ScriptPromiseResolver::resolve(T* value)
{
ASSERT(m_isolate->InContext());
resolve(value, v8::Object::New(m_isolate));
}
template<typename T>
void ScriptPromiseResolver::reject(T* value)
{
ASSERT(m_isolate->InContext());
reject(value, v8::Object::New(m_isolate));
}
} // namespace WebCore
#endif // ScriptPromiseResolver_h
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