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

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  30
  31 #include "config.h"
  32 #include "ServiceWorker.h"
  33
  34 #include "EventTargetNames.h"
  35 #include "bindings/v8/ExceptionState.h"
  36 #include "bindings/v8/ScriptPromiseResolverWithContext.h"
  37 #include "bindings/v8/ScriptState.h"
  38 #include "core/dom/MessagePort.h"
  39 #include "core/events/Event.h"
  40 #include "platform/NotImplemented.h"
  41 #include "public/platform/WebMessagePortChannel.h"
  42 #include "public/platform/WebServiceWorkerState.h"
  43 #include "public/platform/WebString.h"
  44
  45 namespace WebCore {
  46
  47 class ServiceWorker::ThenFunction FINAL : public ScriptFunction {
  48 public:
  49     static PassOwnPtr<ScriptFunction> create(PassRefPtr<ServiceWorker> observer)
  50     {
  51         ExecutionContext* executionContext = observer->executionContext();
  52         return adoptPtr(new ThenFunction(toIsolate(executionContext), observer));
  53     }
  54 private:
  55     ThenFunction(v8::Isolate* isolate, PassRefPtr<ServiceWorker> observer)
  56         : ScriptFunction(isolate)
  57         , m_observer(observer)
  58     {
  59     }
  60
  61     virtual ScriptValue call(ScriptValue value) OVERRIDE
  62     {
  63         m_observer->onPromiseResolved();
  64         return value;
  65     }
  66
  67     RefPtr<ServiceWorker> m_observer;
  68 };
  69
  70 const AtomicString& ServiceWorker::interfaceName() const
  71 {
  72     return EventTargetNames::ServiceWorker;
  73 }
  74
  75 void ServiceWorker::postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
  76 {
  77     // Disentangle the port in preparation for sending it to the remote context.
  78     OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(ports, exceptionState);
  79     if (exceptionState.hadException())
  80         return;
  81
  82     blink::WebString messageString = message->toWireString();
  83     OwnPtr<blink::WebMessagePortChannelArray> webChannels = MessagePort::toWebMessagePortChannelArray(channels.release());
  84     m_outerWorker->postMessage(messageString, webChannels.leakPtr());
  85 }
  86
  87 bool ServiceWorker::isReady()
  88 {
  89     return !m_isPromisePending;
  90 }
  91
  92 void ServiceWorker::dispatchStateChangeEvent()
  93 {
  94     ASSERT(isReady());
  95     this->dispatchEvent(Event::create(EventTypeNames::statechange));
  96 }
  97
  98 const AtomicString& ServiceWorker::state() const
  99 {
 100     DEFINE_STATIC_LOCAL(AtomicString, unknown, ("unknown", AtomicString::ConstructFromLiteral));
 101     DEFINE_STATIC_LOCAL(AtomicString, parsed, ("parsed", AtomicString::ConstructFromLiteral));
 102     DEFINE_STATIC_LOCAL(AtomicString, installing, ("installing", AtomicString::ConstructFromLiteral));
 103     DEFINE_STATIC_LOCAL(AtomicString, installed, ("installed", AtomicString::ConstructFromLiteral));
 104     DEFINE_STATIC_LOCAL(AtomicString, activating, ("activating", AtomicString::ConstructFromLiteral));
 105     DEFINE_STATIC_LOCAL(AtomicString, active, ("active", AtomicString::ConstructFromLiteral));
 106     DEFINE_STATIC_LOCAL(AtomicString, deactivated, ("deactivated", AtomicString::ConstructFromLiteral));
 107
 108     switch (m_outerWorker->state()) {
 109     case blink::WebServiceWorkerStateUnknown:
 110         // The web platform should never see this internal state
 111         ASSERT_NOT_REACHED();
 112         return unknown;
 113     case blink::WebServiceWorkerStateParsed:
 114         return parsed;
 115     case blink::WebServiceWorkerStateInstalling:
 116         return installing;
 117     case blink::WebServiceWorkerStateInstalled:
 118         return installed;
 119     case blink::WebServiceWorkerStateActivating:
 120         return activating;
 121     case blink::WebServiceWorkerStateActive:
 122         return active;
 123     case blink::WebServiceWorkerStateDeactivated:
 124         return deactivated;
 125     default:
 126         ASSERT_NOT_REACHED();
 127         return nullAtom;
 128     }
 129 }
 130
 131 PassRefPtr<ServiceWorker> ServiceWorker::from(ScriptPromiseResolverWithContext* resolver, WebType* worker)
 132 {
 133     ScriptState::Scope scope(resolver->scriptState());
 134     RefPtr<ServiceWorker> serviceWorker = create(resolver->scriptState()->executionContext(), adoptPtr(worker));
 135     serviceWorker->waitOnPromise(resolver->promise());
 136     return serviceWorker;
 137 }
 138
 139 void ServiceWorker::onPromiseResolved()
 140 {
 141     ASSERT(m_isPromisePending);
 142     m_isPromisePending = false;
 143     m_outerWorker->proxyReadyChanged();
 144 }
 145
 146 void ServiceWorker::waitOnPromise(ScriptPromise promise)
 147 {
 148     ASSERT(!m_isPromisePending);
 149     m_isPromisePending = true;
 150     m_outerWorker->proxyReadyChanged();
 151     promise.then(ThenFunction::create(this));
 152 }
 153
 154 PassRefPtr<ServiceWorker> ServiceWorker::create(ExecutionContext* executionContext, PassOwnPtr<blink::WebServiceWorker> outerWorker)
 155 {
 156     RefPtr<ServiceWorker> worker = adoptRef(new ServiceWorker(executionContext, outerWorker));
 157     worker->suspendIfNeeded();
 158     return worker.release();
 159 }
 160
 161 ServiceWorker::ServiceWorker(ExecutionContext* executionContext, PassOwnPtr<blink::WebServiceWorker> worker)
 162     : AbstractWorker(executionContext)
 163     , m_outerWorker(worker)
 164     , m_isPromisePending(false)
 165 {
 166     ScriptWrappable::init(this);
 167     ASSERT(m_outerWorker);
 168     m_outerWorker->setProxy(this);
 169 }
 170
 171 } // namespace WebCore