third_party/WebKit/Source/bindings/core/v8/ScriptPromise.cpp - chromium/src - Git at Google

 /*
  * 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.
  */

 #include "bindings/core/v8/ScriptPromise.h"

 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ToV8.h"
 #include "bindings/core/v8/V8ThrowException.h"
 #include "core/dom/DOMException.h"
 #include "platform/InstanceCounters.h"
 #include "v8/include/v8.h"

 namespace blink {

 namespace {

 class PromiseAllHandler final
     : public GarbageCollectedFinalized<PromiseAllHandler> {
   WTF_MAKE_NONCOPYABLE(PromiseAllHandler);

  public:
   static ScriptPromise all(ScriptState* scriptState,
                            const Vector<ScriptPromise>& promises) {
     if (promises.isEmpty())
       return ScriptPromise::cast(scriptState,
                                  v8::Array::New(scriptState->isolate()));
     return (new PromiseAllHandler(scriptState, promises))->m_resolver.promise();
   }

   DEFINE_INLINE_VIRTUAL_TRACE() {}

  private:
   class AdapterFunction : public ScriptFunction {
    public:
     enum ResolveType {
       Fulfilled,
       Rejected,
     };

     static v8::Local<v8::Function> create(ScriptState* scriptState,
                                           ResolveType resolveType,
                                           size_t index,
                                           PromiseAllHandler* handler) {
       AdapterFunction* self =
           new AdapterFunction(scriptState, resolveType, index, handler);
       return self->bindToV8Function();
     }

     DEFINE_INLINE_VIRTUAL_TRACE() {
       visitor->trace(m_handler);
       ScriptFunction::trace(visitor);
     }

    private:
     AdapterFunction(ScriptState* scriptState,
                     ResolveType resolveType,
                     size_t index,
                     PromiseAllHandler* handler)
         : ScriptFunction(scriptState),
           m_resolveType(resolveType),
           m_index(index),
           m_handler(handler) {}

     ScriptValue call(ScriptValue value) override {
       if (m_resolveType == Fulfilled)
         m_handler->onFulfilled(m_index, value);
       else
         m_handler->onRejected(value);
       // This return value is never used.
       return ScriptValue();
     }

     const ResolveType m_resolveType;
     const size_t m_index;
     Member<PromiseAllHandler> m_handler;
   };

   PromiseAllHandler(ScriptState* scriptState, Vector<ScriptPromise> promises)
       : m_numberOfPendingPromises(promises.size()), m_resolver(scriptState) {
     ASSERT(!promises.isEmpty());
     m_values.resize(promises.size());
     for (size_t i = 0; i < promises.size(); ++i)
       promises[i].then(createFulfillFunction(scriptState, i),
                        createRejectFunction(scriptState));
   }

   v8::Local<v8::Function> createFulfillFunction(ScriptState* scriptState,
                                                 size_t index) {
     return AdapterFunction::create(scriptState, AdapterFunction::Fulfilled,
                                    index, this);
   }

   v8::Local<v8::Function> createRejectFunction(ScriptState* scriptState) {
     return AdapterFunction::create(scriptState, AdapterFunction::Rejected, 0,
                                    this);
   }

   void onFulfilled(size_t index, const ScriptValue& value) {
     if (m_isSettled)
       return;

     ASSERT(index < m_values.size());
     m_values[index] = value;
     if (--m_numberOfPendingPromises > 0)
       return;

     v8::Local<v8::Array> values =
         v8::Array::New(value.isolate(), m_values.size());
     for (size_t i = 0; i < m_values.size(); ++i) {
       if (!v8CallBoolean(values->CreateDataProperty(value.context(), i,
                                                     m_values[i].v8Value())))
         return;
     }

     markPromiseSettled();
     m_resolver.resolve(values);
   }

   void onRejected(const ScriptValue& value) {
     if (m_isSettled)
       return;
     markPromiseSettled();
     m_resolver.reject(value.v8Value());
   }

   void markPromiseSettled() {
     ASSERT(!m_isSettled);
     m_isSettled = true;
     m_values.clear();
   }

   size_t m_numberOfPendingPromises;
   ScriptPromise::InternalResolver m_resolver;
   bool m_isSettled = false;

   // This is cleared when owners of this handler, that is, given promises are
   // settled.
   Vector<ScriptValue> m_values;
 };

 }  // namespace

 ScriptPromise::InternalResolver::InternalResolver(ScriptState* scriptState)
     : m_resolver(scriptState,
                  v8::Promise::Resolver::New(scriptState->context())) {}

 v8::Local<v8::Promise> ScriptPromise::InternalResolver::v8Promise() const {
   if (m_resolver.isEmpty())
     return v8::Local<v8::Promise>();
   return m_resolver.v8Value().As<v8::Promise::Resolver>()->GetPromise();
 }

 ScriptPromise ScriptPromise::InternalResolver::promise() const {
   if (m_resolver.isEmpty())
     return ScriptPromise();
   return ScriptPromise(m_resolver.getScriptState(), v8Promise());
 }

 void ScriptPromise::InternalResolver::resolve(v8::Local<v8::Value> value) {
   if (m_resolver.isEmpty())
     return;
   m_resolver.v8Value().As<v8::Promise::Resolver>()->Resolve(
       m_resolver.context(), value);
   clear();
 }

 void ScriptPromise::InternalResolver::reject(v8::Local<v8::Value> value) {
   if (m_resolver.isEmpty())
     return;
   m_resolver.v8Value().As<v8::Promise::Resolver>()->Reject(m_resolver.context(),
                                                            value);
   clear();
 }

 ScriptPromise::ScriptPromise() {
   increaseInstanceCount();
 }

 ScriptPromise::ScriptPromise(ScriptState* scriptState,
                              v8::Local<v8::Value> value)
     : m_scriptState(scriptState) {
   increaseInstanceCount();

   if (value.IsEmpty())
     return;

   if (!value->IsPromise()) {
     m_promise = ScriptValue(scriptState, v8::Local<v8::Value>());
     V8ThrowException::throwTypeError(scriptState->isolate(),
                                      "the given value is not a Promise");
     return;
   }
   m_promise = ScriptValue(scriptState, value);
 }

 ScriptPromise::ScriptPromise(const ScriptPromise& other) {
   increaseInstanceCount();

   this->m_scriptState = other.m_scriptState;
   this->m_promise = other.m_promise;
 }

 ScriptPromise::~ScriptPromise() {
   decreaseInstanceCount();
 }

 ScriptPromise ScriptPromise::then(v8::Local<v8::Function> onFulfilled,
                                   v8::Local<v8::Function> onRejected) {
   if (m_promise.isEmpty())
     return ScriptPromise();

   v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>();

   ASSERT(promise->IsPromise());
   // Return this Promise if no handlers are given.
   // In fact it is not the exact bahavior of Promise.prototype.then
   // but that is not a problem in this case.
   v8::Local<v8::Promise> resultPromise = promise.As<v8::Promise>();
   if (!onFulfilled.IsEmpty()) {
     if (!resultPromise->Then(m_scriptState->context(), onFulfilled)
              .ToLocal(&resultPromise))
       return ScriptPromise();
   }
   if (!onRejected.IsEmpty()) {
     if (!resultPromise->Catch(m_scriptState->context(), onRejected)
              .ToLocal(&resultPromise))
       return ScriptPromise();
   }

   return ScriptPromise(m_scriptState.get(), resultPromise);
 }

 ScriptPromise ScriptPromise::castUndefined(ScriptState* scriptState) {
   return ScriptPromise::cast(scriptState,
                              v8::Undefined(scriptState->isolate()));
 }

 ScriptPromise ScriptPromise::cast(ScriptState* scriptState,
                                   const ScriptValue& value) {
   return ScriptPromise::cast(scriptState, value.v8Value());
 }

 ScriptPromise ScriptPromise::cast(ScriptState* scriptState,
                                   v8::Local<v8::Value> value) {
   if (value.IsEmpty())
     return ScriptPromise();
   if (value->IsPromise()) {
     return ScriptPromise(scriptState, value);
   }
   InternalResolver resolver(scriptState);
   ScriptPromise promise = resolver.promise();
   resolver.resolve(value);
   return promise;
 }

 ScriptPromise ScriptPromise::reject(ScriptState* scriptState,
                                     const ScriptValue& value) {
   return ScriptPromise::reject(scriptState, value.v8Value());
 }

 ScriptPromise ScriptPromise::reject(ScriptState* scriptState,
                                     v8::Local<v8::Value> value) {
   if (value.IsEmpty())
     return ScriptPromise();
   InternalResolver resolver(scriptState);
   ScriptPromise promise = resolver.promise();
   resolver.reject(value);
   return promise;
 }

 ScriptPromise ScriptPromise::rejectWithDOMException(ScriptState* scriptState,
                                                     DOMException* exception) {
   ASSERT(scriptState->isolate()->InContext());
   return reject(scriptState, ToV8(exception, scriptState->context()->Global(),
                                   scriptState->isolate()));
 }

 v8::Local<v8::Promise> ScriptPromise::rejectRaw(ScriptState* scriptState,
                                                 v8::Local<v8::Value> value) {
   if (value.IsEmpty())
     return v8::Local<v8::Promise>();
   v8::Local<v8::Promise::Resolver> resolver;
   if (!v8::Promise::Resolver::New(scriptState->context()).ToLocal(&resolver))
     return v8::Local<v8::Promise>();
   v8::Local<v8::Promise> promise = resolver->GetPromise();
   resolver->Reject(scriptState->context(), value);
   return promise;
 }

 ScriptPromise ScriptPromise::all(ScriptState* scriptState,
                                  const Vector<ScriptPromise>& promises) {
   return PromiseAllHandler::all(scriptState, promises);
 }

 void ScriptPromise::increaseInstanceCount() {
   InstanceCounters::incrementCounter(InstanceCounters::ScriptPromiseCounter);
 }

 void ScriptPromise::decreaseInstanceCount() {
   InstanceCounters::decrementCounter(InstanceCounters::ScriptPromiseCounter);
 }

 }  // namespace blink
	/*
	* 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.
	*/

	#include "bindings/core/v8/ScriptPromise.h"

	#include "bindings/core/v8/ExceptionMessages.h"
	#include "bindings/core/v8/ExceptionState.h"
	#include "bindings/core/v8/ToV8.h"
	#include "bindings/core/v8/V8ThrowException.h"
	#include "core/dom/DOMException.h"
	#include "platform/InstanceCounters.h"
	#include "v8/include/v8.h"

	namespace blink {

	namespace {

	class PromiseAllHandler final
	: public GarbageCollectedFinalized<PromiseAllHandler> {
	WTF_MAKE_NONCOPYABLE(PromiseAllHandler);

	public:
	static ScriptPromise all(ScriptState* scriptState,
	const Vector<ScriptPromise>& promises) {
	if (promises.isEmpty())
	return ScriptPromise::cast(scriptState,
	v8::Array::New(scriptState->isolate()));
	return (new PromiseAllHandler(scriptState, promises))->m_resolver.promise();
	}

	DEFINE_INLINE_VIRTUAL_TRACE() {}

	private:
	class AdapterFunction : public ScriptFunction {
	public:
	enum ResolveType {
	Fulfilled,
	Rejected,
	};

	static v8::Local<v8::Function> create(ScriptState* scriptState,
	ResolveType resolveType,
	size_t index,
	PromiseAllHandler* handler) {
	AdapterFunction* self =
	new AdapterFunction(scriptState, resolveType, index, handler);
	return self->bindToV8Function();
	}

	DEFINE_INLINE_VIRTUAL_TRACE() {
	visitor->trace(m_handler);
	ScriptFunction::trace(visitor);
	}

	private:
	AdapterFunction(ScriptState* scriptState,
	ResolveType resolveType,
	size_t index,
	PromiseAllHandler* handler)
	: ScriptFunction(scriptState),
	m_resolveType(resolveType),
	m_index(index),
	m_handler(handler) {}

	ScriptValue call(ScriptValue value) override {
	if (m_resolveType == Fulfilled)
	m_handler->onFulfilled(m_index, value);
	else
	m_handler->onRejected(value);
	// This return value is never used.
	return ScriptValue();
	}

	const ResolveType m_resolveType;
	const size_t m_index;
	Member<PromiseAllHandler> m_handler;
	};

	PromiseAllHandler(ScriptState* scriptState, Vector<ScriptPromise> promises)
	: m_numberOfPendingPromises(promises.size()), m_resolver(scriptState) {
	ASSERT(!promises.isEmpty());
	m_values.resize(promises.size());
	for (size_t i = 0; i < promises.size(); ++i)
	promises[i].then(createFulfillFunction(scriptState, i),
	createRejectFunction(scriptState));
	}

	v8::Local<v8::Function> createFulfillFunction(ScriptState* scriptState,
	size_t index) {
	return AdapterFunction::create(scriptState, AdapterFunction::Fulfilled,
	index, this);
	}

	v8::Local<v8::Function> createRejectFunction(ScriptState* scriptState) {
	return AdapterFunction::create(scriptState, AdapterFunction::Rejected, 0,
	this);
	}

	void onFulfilled(size_t index, const ScriptValue& value) {
	if (m_isSettled)
	return;

	ASSERT(index < m_values.size());
	m_values[index] = value;
	if (--m_numberOfPendingPromises > 0)
	return;

	v8::Local<v8::Array> values =
	v8::Array::New(value.isolate(), m_values.size());
	for (size_t i = 0; i < m_values.size(); ++i) {
	if (!v8CallBoolean(values->CreateDataProperty(value.context(), i,
	m_values[i].v8Value())))
	return;
	}

	markPromiseSettled();
	m_resolver.resolve(values);
	}

	void onRejected(const ScriptValue& value) {
	if (m_isSettled)
	return;
	markPromiseSettled();
	m_resolver.reject(value.v8Value());
	}

	void markPromiseSettled() {
	ASSERT(!m_isSettled);
	m_isSettled = true;
	m_values.clear();
	}

	size_t m_numberOfPendingPromises;
	ScriptPromise::InternalResolver m_resolver;
	bool m_isSettled = false;

	// This is cleared when owners of this handler, that is, given promises are
	// settled.
	Vector<ScriptValue> m_values;
	};

	} // namespace

	ScriptPromise::InternalResolver::InternalResolver(ScriptState* scriptState)
	: m_resolver(scriptState,
	v8::Promise::Resolver::New(scriptState->context())) {}

	v8::Local<v8::Promise> ScriptPromise::InternalResolver::v8Promise() const {
	if (m_resolver.isEmpty())
	return v8::Local<v8::Promise>();
	return m_resolver.v8Value().As<v8::Promise::Resolver>()->GetPromise();
	}

	ScriptPromise ScriptPromise::InternalResolver::promise() const {
	if (m_resolver.isEmpty())
	return ScriptPromise();
	return ScriptPromise(m_resolver.getScriptState(), v8Promise());
	}

	void ScriptPromise::InternalResolver::resolve(v8::Local<v8::Value> value) {
	if (m_resolver.isEmpty())
	return;
	m_resolver.v8Value().As<v8::Promise::Resolver>()->Resolve(
	m_resolver.context(), value);
	clear();
	}

	void ScriptPromise::InternalResolver::reject(v8::Local<v8::Value> value) {
	if (m_resolver.isEmpty())
	return;
	m_resolver.v8Value().As<v8::Promise::Resolver>()->Reject(m_resolver.context(),
	value);
	clear();
	}

	ScriptPromise::ScriptPromise() {
	increaseInstanceCount();
	}

	ScriptPromise::ScriptPromise(ScriptState* scriptState,
	v8::Local<v8::Value> value)
	: m_scriptState(scriptState) {
	increaseInstanceCount();

	if (value.IsEmpty())
	return;

	if (!value->IsPromise()) {
	m_promise = ScriptValue(scriptState, v8::Local<v8::Value>());
	V8ThrowException::throwTypeError(scriptState->isolate(),
	"the given value is not a Promise");
	return;
	}
	m_promise = ScriptValue(scriptState, value);
	}

	ScriptPromise::ScriptPromise(const ScriptPromise& other) {
	increaseInstanceCount();

	this->m_scriptState = other.m_scriptState;
	this->m_promise = other.m_promise;
	}

	ScriptPromise::~ScriptPromise() {
	decreaseInstanceCount();
	}

	ScriptPromise ScriptPromise::then(v8::Local<v8::Function> onFulfilled,
	v8::Local<v8::Function> onRejected) {
	if (m_promise.isEmpty())
	return ScriptPromise();

	v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>();

	ASSERT(promise->IsPromise());
	// Return this Promise if no handlers are given.
	// In fact it is not the exact bahavior of Promise.prototype.then
	// but that is not a problem in this case.
	v8::Local<v8::Promise> resultPromise = promise.As<v8::Promise>();
	if (!onFulfilled.IsEmpty()) {
	if (!resultPromise->Then(m_scriptState->context(), onFulfilled)
	.ToLocal(&resultPromise))
	return ScriptPromise();
	}
	if (!onRejected.IsEmpty()) {
	if (!resultPromise->Catch(m_scriptState->context(), onRejected)
	.ToLocal(&resultPromise))
	return ScriptPromise();
	}

	return ScriptPromise(m_scriptState.get(), resultPromise);
	}

	ScriptPromise ScriptPromise::castUndefined(ScriptState* scriptState) {
	return ScriptPromise::cast(scriptState,
	v8::Undefined(scriptState->isolate()));
	}

	ScriptPromise ScriptPromise::cast(ScriptState* scriptState,
	const ScriptValue& value) {
	return ScriptPromise::cast(scriptState, value.v8Value());
	}

	ScriptPromise ScriptPromise::cast(ScriptState* scriptState,
	v8::Local<v8::Value> value) {
	if (value.IsEmpty())
	return ScriptPromise();
	if (value->IsPromise()) {
	return ScriptPromise(scriptState, value);
	}
	InternalResolver resolver(scriptState);
	ScriptPromise promise = resolver.promise();
	resolver.resolve(value);
	return promise;
	}

	ScriptPromise ScriptPromise::reject(ScriptState* scriptState,
	const ScriptValue& value) {
	return ScriptPromise::reject(scriptState, value.v8Value());
	}

	ScriptPromise ScriptPromise::reject(ScriptState* scriptState,
	v8::Local<v8::Value> value) {
	if (value.IsEmpty())
	return ScriptPromise();
	InternalResolver resolver(scriptState);
	ScriptPromise promise = resolver.promise();
	resolver.reject(value);
	return promise;
	}

	ScriptPromise ScriptPromise::rejectWithDOMException(ScriptState* scriptState,
	DOMException* exception) {
	ASSERT(scriptState->isolate()->InContext());
	return reject(scriptState, ToV8(exception, scriptState->context()->Global(),
	scriptState->isolate()));
	}

	v8::Local<v8::Promise> ScriptPromise::rejectRaw(ScriptState* scriptState,
	v8::Local<v8::Value> value) {
	if (value.IsEmpty())
	return v8::Local<v8::Promise>();
	v8::Local<v8::Promise::Resolver> resolver;
	if (!v8::Promise::Resolver::New(scriptState->context()).ToLocal(&resolver))
	return v8::Local<v8::Promise>();
	v8::Local<v8::Promise> promise = resolver->GetPromise();
	resolver->Reject(scriptState->context(), value);
	return promise;
	}

	ScriptPromise ScriptPromise::all(ScriptState* scriptState,
	const Vector<ScriptPromise>& promises) {
	return PromiseAllHandler::all(scriptState, promises);
	}

	void ScriptPromise::increaseInstanceCount() {
	InstanceCounters::incrementCounter(InstanceCounters::ScriptPromiseCounter);
	}

	void ScriptPromise::decreaseInstanceCount() {
	InstanceCounters::decrementCounter(InstanceCounters::ScriptPromiseCounter);
	}

	} // namespace blink