root/Source/bindings/v8/ScriptPromiseResolver.cpp

DEFINITIONS

1. promise
2. create
3. create
4. resolve
5. reject
6. resolve
7. reject

/*
 * 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,
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#include "config.h"
#include "bindings/v8/ScriptPromiseResolver.h"

#include "RuntimeEnabledFeatures.h"
#include "bindings/v8/ScriptState.h"
#include "bindings/v8/ScriptValue.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8DOMWrapper.h"
#include "bindings/v8/custom/V8PromiseCustom.h"

#include <v8.h>

namespace WebCore {

ScriptPromiseResolver::ScriptPromiseResolver(ExecutionContext* context)
    : m_isolate(toIsolate(context))
{
    ASSERT(context);
    v8::Isolate* isolate = toIsolate(context);
    ASSERT(isolate->InContext());
    if (RuntimeEnabledFeatures::scriptPromiseOnV8PromiseEnabled()) {
        m_resolver = ScriptValue(v8::Promise::Resolver::New(isolate), isolate);
    } else {
        v8::Handle<v8::Context> v8Context = toV8Context(context, DOMWrapperWorld::current(isolate));
        v8::Handle<v8::Object> creationContext = v8Context.IsEmpty() ? v8::Object::New(isolate) : v8Context->Global();
        m_promise = ScriptPromise(V8PromiseCustom::createPromise(creationContext, isolate), isolate);
    }
}

ScriptPromiseResolver::ScriptPromiseResolver(v8::Isolate* isolate)
    : m_isolate(isolate)
{
    ASSERT(isolate->InContext());
    if (RuntimeEnabledFeatures::scriptPromiseOnV8PromiseEnabled()) {
        m_resolver = ScriptValue(v8::Promise::Resolver::New(isolate), isolate);
    } else {
        m_promise = ScriptPromise(V8PromiseCustom::createPromise(v8::Object::New(isolate), isolate), isolate);
    }
}

ScriptPromiseResolver::~ScriptPromiseResolver()
{
    // We don't call "reject" here because it requires a caller
    // to be in a v8 context.

    m_promise.clear();
    m_resolver.clear();
}

ScriptPromise ScriptPromiseResolver::promise()
{
    ASSERT(m_isolate->InContext());
    if (!m_resolver.hasNoValue()) {
        v8::Local<v8::Promise::Resolver> v8Resolver = m_resolver.v8Value().As<v8::Promise::Resolver>();
        return ScriptPromise(v8Resolver->GetPromise(), m_isolate);
    }
    return m_promise;
}

PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create(ExecutionContext* context)
{
    ASSERT(context);
    ASSERT(toIsolate(context)->InContext());
    return adoptRef(new ScriptPromiseResolver(context));
}

PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create(v8::Isolate* isolate)
{
    ASSERT(isolate->InContext());
    return adoptRef(new ScriptPromiseResolver(isolate));
}

void ScriptPromiseResolver::resolve(v8::Handle<v8::Value> value)
{
    ASSERT(m_isolate->InContext());
    if (!m_resolver.hasNoValue()) {
        m_resolver.v8Value().As<v8::Promise::Resolver>()->Resolve(value);
    } else if (!m_promise.hasNoValue()) {
        v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>();
        ASSERT(V8PromiseCustom::isPromise(promise, m_isolate));
        V8PromiseCustom::resolve(promise, value, m_isolate);
    }
    m_promise.clear();
    m_resolver.clear();
}

void ScriptPromiseResolver::reject(v8::Handle<v8::Value> value)
{
    ASSERT(m_isolate->InContext());
    if (!m_resolver.hasNoValue()) {
        m_resolver.v8Value().As<v8::Promise::Resolver>()->Reject(value);
    } else if (!m_promise.hasNoValue()) {
        v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>();
        ASSERT(V8PromiseCustom::isPromise(promise, m_isolate));
        V8PromiseCustom::reject(promise, value, m_isolate);
    }
    m_promise.clear();
    m_resolver.clear();
}

void ScriptPromiseResolver::resolve(ScriptValue value)
{
    ASSERT(m_isolate->InContext());
    resolve(value.v8Value());
}

void ScriptPromiseResolver::reject(ScriptValue value)
{
    ASSERT(m_isolate->InContext());
    reject(value.v8Value());
}

} // namespace WebCore