content/child/service_worker/web_service_worker_impl.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/child/service_worker/web_service_worker_impl.h"
   6
   7 #include "content/child/service_worker/service_worker_dispatcher.h"
   8 #include "content/child/service_worker/service_worker_handle_reference.h"
   9 #include "content/child/thread_safe_sender.h"
  10 #include "content/child/webmessageportchannel_impl.h"
  11 #include "content/common/service_worker/service_worker_messages.h"
  12 #include "third_party/WebKit/public/platform/WebString.h"
  13 #include "third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerProxy.h"
  14
  15 using blink::WebMessagePortChannel;
  16 using blink::WebMessagePortChannelArray;
  17 using blink::WebMessagePortChannelClient;
  18 using blink::WebString;
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 void SendPostMessageToWorkerOnMainThread(
  25     ThreadSafeSender* thread_safe_sender,
  26     int handle_id,
  27     const base::string16& message,
  28     scoped_ptr<WebMessagePortChannelArray> channels) {
  29   thread_safe_sender->Send(new ServiceWorkerHostMsg_PostMessageToWorker(
  30       handle_id, message,
  31       WebMessagePortChannelImpl::ExtractMessagePortIDs(channels.Pass())));
  32 }
  33
  34 }  // namespace
  35
  36 WebServiceWorkerImpl::WebServiceWorkerImpl(
  37     scoped_ptr<ServiceWorkerHandleReference> handle_ref,
  38     ThreadSafeSender* thread_safe_sender)
  39     : handle_ref_(handle_ref.Pass()),
  40       state_(handle_ref_->state()),
  41       thread_safe_sender_(thread_safe_sender),
  42       proxy_(NULL) {
  43   ServiceWorkerDispatcher* dispatcher =
  44       ServiceWorkerDispatcher::GetThreadSpecificInstance();
  45   DCHECK(dispatcher);
  46   dispatcher->AddServiceWorker(handle_ref_->handle_id(), this);
  47 }
  48
  49 WebServiceWorkerImpl::~WebServiceWorkerImpl() {
  50   if (handle_ref_->handle_id() == kInvalidServiceWorkerHandleId)
  51     return;
  52   ServiceWorkerDispatcher* dispatcher =
  53       ServiceWorkerDispatcher::GetThreadSpecificInstance();
  54   if (dispatcher)
  55     dispatcher->RemoveServiceWorker(handle_ref_->handle_id());
  56 }
  57
  58 void WebServiceWorkerImpl::OnStateChanged(
  59     blink::WebServiceWorkerState new_state) {
  60   state_ = new_state;
  61   proxy_->dispatchStateChangeEvent();
  62 }
  63
  64 void WebServiceWorkerImpl::setProxy(blink::WebServiceWorkerProxy* proxy) {
  65   proxy_ = proxy;
  66 }
  67
  68 blink::WebServiceWorkerProxy* WebServiceWorkerImpl::proxy() {
  69   return proxy_;
  70 }
  71
  72 blink::WebURL WebServiceWorkerImpl::url() const {
  73   return handle_ref_->url();
  74 }
  75
  76 blink::WebServiceWorkerState WebServiceWorkerImpl::state() const {
  77   return state_;
  78 }
  79
  80 void WebServiceWorkerImpl::postMessage(const WebString& message,
  81                                        WebMessagePortChannelArray* channels) {
  82   ServiceWorkerDispatcher* dispatcher =
  83       ServiceWorkerDispatcher::GetThreadSpecificInstance();
  84   DCHECK(dispatcher);
  85
  86   // This may send channels for MessagePorts, and all internal book-keeping
  87   // messages for MessagePort (e.g. QueueMessages) are sent from main thread
  88   // (with thread hopping), so we need to do the same thread hopping here not
  89   // to overtake those messages.
  90   dispatcher->main_thread_task_runner()->PostTask(
  91       FROM_HERE, base::Bind(&SendPostMessageToWorkerOnMainThread,
  92                             thread_safe_sender_, handle_ref_->handle_id(),
  93                             // We cast WebString to string16 before crossing
  94                             // threads for thread-safety.
  95                             static_cast<base::string16>(message),
  96                             base::Passed(make_scoped_ptr(channels))));
  97 }
  98
  99 void WebServiceWorkerImpl::terminate() {
 100   thread_safe_sender_->Send(
 101       new ServiceWorkerHostMsg_TerminateWorker(handle_ref_->handle_id()));
 102 }
 103
 104 }  // namespace content