third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp

/*
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 * modification, are permitted provided that the following conditions are
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#include "modules/serviceworkers/ServiceWorker.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/MessagePort.h"
#include "core/events/Event.h"
#include "core/inspector/ConsoleMessage.h"
#include "modules/EventTargetModules.h"
#include "public/platform/WebMessagePortChannel.h"
#include "public/platform/WebString.h"
#include "public/platform/modules/serviceworker/WebServiceWorkerState.h"

namespace blink {

const AtomicString& ServiceWorker::interfaceName() const
{
    return EventTargetNames::ServiceWorker;
}

void ServiceWorker::postMessage(ExecutionContext* context, PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
{
    // Disentangle the port in preparation for sending it to the remote context.
    OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(context, ports, exceptionState);
    if (exceptionState.hadException())
        return;
    if (m_handle->serviceWorker()->state() == WebServiceWorkerStateRedundant) {
        exceptionState.throwDOMException(InvalidStateError, "ServiceWorker is in redundant state.");
        return;
    }

    if (message->containsTransferableArrayBuffer())
        context->addConsoleMessage(ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "ServiceWorker cannot send an ArrayBuffer as a transferable object yet. See http://crbug.com/511119"));

    WebString messageString = message->toWireString();
    OwnPtr<WebMessagePortChannelArray> webChannels = MessagePort::toWebMessagePortChannelArray(channels.release());
    m_handle->serviceWorker()->postMessage(messageString, webChannels.leakPtr());
}

void ServiceWorker::internalsTerminate()
{
    m_handle->serviceWorker()->terminate();
}

void ServiceWorker::dispatchStateChangeEvent()
{
    this->dispatchEvent(Event::create(EventTypeNames::statechange));
}

String ServiceWorker::scriptURL() const
{
    return m_handle->serviceWorker()->url().string();
}

String ServiceWorker::state() const
{
    switch (m_handle->serviceWorker()->state()) {
    case WebServiceWorkerStateUnknown:
        // The web platform should never see this internal state
        ASSERT_NOT_REACHED();
        return "unknown";
    case WebServiceWorkerStateInstalling:
        return "installing";
    case WebServiceWorkerStateInstalled:
        return "installed";
    case WebServiceWorkerStateActivating:
        return "activating";
    case WebServiceWorkerStateActivated:
        return "activated";
    case WebServiceWorkerStateRedundant:
        return "redundant";
    default:
        ASSERT_NOT_REACHED();
        return nullAtom;
    }
}

ServiceWorker* ServiceWorker::from(ExecutionContext* executionContext, PassOwnPtr<WebServiceWorker::Handle> handle)
{
    return getOrCreate(executionContext, handle);
}

bool ServiceWorker::hasPendingActivity() const
{
    if (AbstractWorker::hasPendingActivity())
        return true;
    if (m_wasStopped)
        return false;
    return m_handle->serviceWorker()->state() != WebServiceWorkerStateRedundant;
}

void ServiceWorker::stop()
{
    m_wasStopped = true;
}

ServiceWorker* ServiceWorker::getOrCreate(ExecutionContext* executionContext, PassOwnPtr<WebServiceWorker::Handle> handle)
{
    if (!handle)
        return nullptr;

    ServiceWorker* existingWorker = static_cast<ServiceWorker*>(handle->serviceWorker()->proxy());
    if (existingWorker) {
        ASSERT(existingWorker->executionContext() == executionContext);
        return existingWorker;
    }

    ServiceWorker* newWorker = new ServiceWorker(executionContext, handle);
    newWorker->suspendIfNeeded();
    return newWorker;
}

ServiceWorker::ServiceWorker(ExecutionContext* executionContext, PassOwnPtr<WebServiceWorker::Handle> handle)
    : AbstractWorker(executionContext)
    , m_handle(handle)
    , m_wasStopped(false)
{
    ASSERT(m_handle);
    m_handle->serviceWorker()->setProxy(this);
}

ServiceWorker::~ServiceWorker()
{
}

} // namespace blink