Source/WebCore/bindings/js/JSWorkerGlobalScopeBase.cpp

/*
 * Copyright (C) 2008, 2009, 2016 Apple Inc. All rights reserved.
 * Copyright (C) 2009 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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
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#include "config.h"
#include "JSWorkerGlobalScopeBase.h"

#include "ActiveDOMCallbackMicrotask.h"
#include "DOMWrapperWorld.h"
#include "JSDOMGlobalObjectTask.h"
#include "JSDOMGuardedObject.h"
#include "JSDedicatedWorkerGlobalScope.h"
#include "JSMicrotaskCallback.h"
#include "JSWorkerGlobalScope.h"
#include "WorkerGlobalScope.h"
#include "WorkerThread.h"
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <JavaScriptCore/JSProxy.h>
#include <JavaScriptCore/Microtask.h>
#include <wtf/Language.h>

#if ENABLE(SERVICE_WORKER)
#include "JSServiceWorkerGlobalScope.h"
#endif


namespace WebCore {
using namespace JSC;

const ClassInfo JSWorkerGlobalScopeBase::s_info = { "WorkerGlobalScope", &JSDOMGlobalObject::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWorkerGlobalScopeBase) };

const GlobalObjectMethodTable JSWorkerGlobalScopeBase::s_globalObjectMethodTable = {
    &supportsRichSourceInfo,
    &shouldInterruptScript,
    &javaScriptRuntimeFlags,
    &queueTaskToEventLoop,
    &shouldInterruptScriptBeforeTimeout,
    nullptr, // moduleLoaderImportModule
    nullptr, // moduleLoaderResolve
    nullptr, // moduleLoaderFetch
    nullptr, // moduleLoaderCreateImportMetaProperties
    nullptr, // moduleLoaderEvaluate
    &promiseRejectionTracker,
    &defaultLanguage,
    nullptr, // compileStreaming
    nullptr, // instantiateStreaming
};

JSWorkerGlobalScopeBase::JSWorkerGlobalScopeBase(JSC::VM& vm, JSC::Structure* structure, RefPtr<WorkerGlobalScope>&& impl)
    : JSDOMGlobalObject(vm, structure, normalWorld(vm), &s_globalObjectMethodTable)
    , m_wrapped(WTFMove(impl))
{
}

void JSWorkerGlobalScopeBase::finishCreation(VM& vm, JSProxy* proxy)
{
    m_proxy.set(vm, this, proxy);

    Base::finishCreation(vm, m_proxy.get());
    ASSERT(inherits(vm, info()));
}

void JSWorkerGlobalScopeBase::clearDOMGuardedObjects()
{
    auto guardedObjects = m_guardedObjects;
    for (auto& guarded : guardedObjects)
        guarded->clear();
}

void JSWorkerGlobalScopeBase::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
    JSWorkerGlobalScopeBase* thisObject = jsCast<JSWorkerGlobalScopeBase*>(cell);
    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
    Base::visitChildren(thisObject, visitor);
    visitor.append(thisObject->m_proxy);
}

void JSWorkerGlobalScopeBase::destroy(JSCell* cell)
{
    static_cast<JSWorkerGlobalScopeBase*>(cell)->JSWorkerGlobalScopeBase::~JSWorkerGlobalScopeBase();
}

ScriptExecutionContext* JSWorkerGlobalScopeBase::scriptExecutionContext() const
{
    return m_wrapped.get();
}

bool JSWorkerGlobalScopeBase::supportsRichSourceInfo(const JSGlobalObject* object)
{
    return JSGlobalObject::supportsRichSourceInfo(object);
}

bool JSWorkerGlobalScopeBase::shouldInterruptScript(const JSGlobalObject* object)
{
    return JSGlobalObject::shouldInterruptScript(object);
}

bool JSWorkerGlobalScopeBase::shouldInterruptScriptBeforeTimeout(const JSGlobalObject* object)
{
    return JSGlobalObject::shouldInterruptScriptBeforeTimeout(object);
}

RuntimeFlags JSWorkerGlobalScopeBase::javaScriptRuntimeFlags(const JSGlobalObject* object)
{
    const JSWorkerGlobalScopeBase *thisObject = jsCast<const JSWorkerGlobalScopeBase*>(object);
    return thisObject->m_wrapped->thread().runtimeFlags();
}

void JSWorkerGlobalScopeBase::queueTaskToEventLoop(JSGlobalObject& object, Ref<JSC::Microtask>&& task)
{
    JSWorkerGlobalScopeBase& thisObject = static_cast<JSWorkerGlobalScopeBase&>(object);

    auto callback = JSMicrotaskCallback::create(thisObject, WTFMove(task));
    auto& context = thisObject.wrapped();
    auto microtask = makeUnique<ActiveDOMCallbackMicrotask>(context.microtaskQueue(), context, [callback = WTFMove(callback)]() mutable {
        callback->call();
    });

    context.microtaskQueue().append(WTFMove(microtask));
}

JSValue toJS(JSGlobalObject* lexicalGlobalObject, JSDOMGlobalObject*, WorkerGlobalScope& workerGlobalScope)
{
    return toJS(lexicalGlobalObject, workerGlobalScope);
}

JSValue toJS(JSGlobalObject*, WorkerGlobalScope& workerGlobalScope)
{
    WorkerScriptController* script = workerGlobalScope.script();
    if (!script)
        return jsNull();
    JSWorkerGlobalScope* contextWrapper = script->workerGlobalScopeWrapper();
    ASSERT(contextWrapper);
    return contextWrapper->proxy();
}

JSDedicatedWorkerGlobalScope* toJSDedicatedWorkerGlobalScope(VM& vm, JSValue value)
{
    if (!value.isObject())
        return nullptr;
    const ClassInfo* classInfo = asObject(value)->classInfo(vm);
    if (classInfo == JSDedicatedWorkerGlobalScope::info())
        return jsCast<JSDedicatedWorkerGlobalScope*>(asObject(value));
    if (classInfo == JSProxy::info())
        return jsDynamicCast<JSDedicatedWorkerGlobalScope*>(vm, jsCast<JSProxy*>(asObject(value))->target());
    return nullptr;
}

JSWorkerGlobalScope* toJSWorkerGlobalScope(VM& vm, JSValue value)
{
    if (!value.isObject())
        return nullptr;
    const ClassInfo* classInfo = asObject(value)->classInfo(vm);
    if (classInfo == JSDedicatedWorkerGlobalScope::info())
        return jsCast<JSDedicatedWorkerGlobalScope*>(asObject(value));

#if ENABLE(SERVICE_WORKER)
    if (classInfo == JSServiceWorkerGlobalScope::info())
        return jsCast<JSServiceWorkerGlobalScope*>(asObject(value));
#endif

    if (classInfo == JSProxy::info())
        return jsDynamicCast<JSWorkerGlobalScope*>(vm, jsCast<JSProxy*>(asObject(value))->target());

    return nullptr;
}

#if ENABLE(SERVICE_WORKER)
JSServiceWorkerGlobalScope* toJSServiceWorkerGlobalScope(VM& vm, JSValue value)
{
    if (!value.isObject())
        return nullptr;
    const ClassInfo* classInfo = asObject(value)->classInfo(vm);
    if (classInfo == JSServiceWorkerGlobalScope::info())
        return jsCast<JSServiceWorkerGlobalScope*>(asObject(value));
    if (classInfo == JSProxy::info())
        return jsDynamicCast<JSServiceWorkerGlobalScope*>(vm, jsCast<JSProxy*>(asObject(value))->target());
    return nullptr;
}
#endif

} // namespace WebCore