Source/WebCore/workers/DedicatedWorkerGlobalScope.cpp

/*
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 * Copyright (C) 2016 Apple Inc. All rights reserved.
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#include "config.h"
#include "DedicatedWorkerGlobalScope.h"

#include "ContentSecurityPolicyResponseHeaders.h"
#include "DOMWindow.h"
#include "DedicatedWorkerThread.h"
#include "JSRTCRtpScriptTransformer.h"
#include "JSRTCRtpScriptTransformerConstructor.h"
#include "MessageEvent.h"
#include "RTCRtpScriptTransformer.h"
#include "RequestAnimationFrameCallback.h"
#include "SecurityOrigin.h"
#if ENABLE(OFFSCREEN_CANVAS)
#include "WorkerAnimationController.h"
#endif
#include "WorkerObjectProxy.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(DedicatedWorkerGlobalScope);

Ref<DedicatedWorkerGlobalScope> DedicatedWorkerGlobalScope::create(const WorkerParameters& params, Ref<SecurityOrigin>&& origin, DedicatedWorkerThread& thread, Ref<SecurityOrigin>&& topOrigin, IDBClient::IDBConnectionProxy* connectionProxy, SocketProvider* socketProvider)
{
    auto context = adoptRef(*new DedicatedWorkerGlobalScope(params, WTFMove(origin), thread, WTFMove(topOrigin), connectionProxy, socketProvider));
    if (!params.shouldBypassMainWorldContentSecurityPolicy)
        context->applyContentSecurityPolicyResponseHeaders(params.contentSecurityPolicyResponseHeaders);
    return context;
}

DedicatedWorkerGlobalScope::DedicatedWorkerGlobalScope(const WorkerParameters& params, Ref<SecurityOrigin>&& origin, DedicatedWorkerThread& thread, Ref<SecurityOrigin>&& topOrigin, IDBClient::IDBConnectionProxy* connectionProxy, SocketProvider* socketProvider)
    : WorkerGlobalScope(WorkerThreadType::DedicatedWorker, params, WTFMove(origin), thread, WTFMove(topOrigin), connectionProxy, socketProvider)
    , m_name(params.name)
{
}

DedicatedWorkerGlobalScope::~DedicatedWorkerGlobalScope() = default;

EventTargetInterface DedicatedWorkerGlobalScope::eventTargetInterface() const
{
    return DedicatedWorkerGlobalScopeEventTargetInterfaceType;
}

void DedicatedWorkerGlobalScope::prepareForDestruction()
{
    WorkerGlobalScope::prepareForDestruction();

#if ENABLE(WEB_RTC)
    m_rtcRtpTransformerConstructorMap.clear();
#endif
}

ExceptionOr<void> DedicatedWorkerGlobalScope::postMessage(JSC::JSGlobalObject& state, JSC::JSValue messageValue, PostMessageOptions&& options)
{
    Vector<RefPtr<MessagePort>> ports;
    auto message = SerializedScriptValue::create(state, messageValue, WTFMove(options.transfer), ports, SerializationContext::WorkerPostMessage);
    if (message.hasException())
        return message.releaseException();

    // Disentangle the port in preparation for sending it to the remote context.
    auto channels = MessagePort::disentanglePorts(WTFMove(ports));
    if (channels.hasException())
        return channels.releaseException();

    thread().workerObjectProxy().postMessageToWorkerObject({ message.releaseReturnValue(), channels.releaseReturnValue() });
    return { };
}

ExceptionOr<void> DedicatedWorkerGlobalScope::importScripts(const Vector<String>& urls)
{
    auto result = Base::importScripts(urls);
    thread().workerObjectProxy().reportPendingActivity(hasPendingActivity());
    return result;
}

DedicatedWorkerThread& DedicatedWorkerGlobalScope::thread()
{
    return static_cast<DedicatedWorkerThread&>(Base::thread());
}

#if ENABLE(OFFSCREEN_CANVAS)
CallbackId DedicatedWorkerGlobalScope::requestAnimationFrame(Ref<RequestAnimationFrameCallback>&& callback)
{
    if (!m_workerAnimationController)
        m_workerAnimationController = WorkerAnimationController::create(*this);
    return m_workerAnimationController->requestAnimationFrame(WTFMove(callback));
}

void DedicatedWorkerGlobalScope::cancelAnimationFrame(CallbackId callbackId)
{
    if (m_workerAnimationController)
        m_workerAnimationController->cancelAnimationFrame(callbackId);
}
#endif

#if ENABLE(WEB_RTC)
ExceptionOr<void> DedicatedWorkerGlobalScope::registerRTCRtpScriptTransformer(String&& name, Ref<JSRTCRtpScriptTransformerConstructor>&& transformerConstructor)
{
    ASSERT(!isMainThread());

    if (name.isEmpty())
        return Exception { NotSupportedError, "Name cannot be the empty string"_s };

    if (m_rtcRtpTransformerConstructorMap.contains(name))
        return Exception { NotSupportedError, "A transformer was already registered with this name"_s };

    JSC::JSObject* jsConstructor = transformerConstructor->callbackData()->callback();
    auto* globalObject = jsConstructor->globalObject();
    auto& vm = globalObject->vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    if (!jsConstructor->isConstructor(vm))
        return Exception { TypeError, "Class definitition passed to registerRTCRtpScriptTransformer() is not a constructor"_s };

    auto prototype = jsConstructor->getPrototype(vm, globalObject);
    RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });

    if (!prototype.isObject())
        return Exception { TypeError, "Class definitition passed to registerRTCRtpScriptTransformer() has invalid prototype"_s };

    m_rtcRtpTransformerConstructorMap.add(name, WTFMove(transformerConstructor));

    thread().workerObjectProxy().postTaskToWorkerObject([name = name.isolatedCopy()](auto& worker) mutable {
        worker.addRTCRtpScriptTransformer(WTFMove(name));
    });

    return { };
}

RefPtr<RTCRtpScriptTransformer> DedicatedWorkerGlobalScope::createRTCRtpScriptTransformer(String&& name, TransferredMessagePort port)
{
    auto constructor = m_rtcRtpTransformerConstructorMap.get(name);
    ASSERT(constructor);
    if (!constructor)
        return nullptr;

    auto* jsConstructor = constructor->callbackData()->callback();
    auto* globalObject = constructor->callbackData()->globalObject();
    auto& vm = globalObject->vm();
    auto scope = DECLARE_CATCH_SCOPE(vm);
    JSC::JSLockHolder lock { globalObject };

    m_pendingRTCTransfomerMessagePort = MessagePort::entangle(*this, WTFMove(port));

    JSC::MarkedArgumentBuffer args;
    auto* object = JSC::construct(globalObject, jsConstructor, args, "Failed to construct RTCRtpScriptTransformer");
    ASSERT(!!scope.exception() == !object);

    if (scope.exception()) {
        scope.clearException();
        return nullptr;
    }
    RETURN_IF_EXCEPTION(scope, nullptr);

    auto& jsTransformer = *JSC::jsCast<JSRTCRtpScriptTransformer*>(object);
    auto& transformer = jsTransformer.wrapped();
    transformer.setCallback(makeUnique<JSCallbackDataStrong>(&jsTransformer, globalObject));

    return &transformer;
}

#endif

} // namespace WebCore