Removing dedicated worker-related IPC code (second round).

content/renderer/websharedworker_proxy.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/websharedworker_proxy.h"
-
+#include "content/common/child_thread.h"
 #include "content/common/view_messages.h"
 #include "content/common/webmessageportchannel_impl.h"
 #include "content/common/worker_messages.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebURL.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebWorkerClient.h"
 
 WebSharedWorkerProxy::WebSharedWorkerProxy(ChildThread* child_thread,
                                            unsigned long long document_id,
                                            bool exists,
                                            int route_id,
                                            int render_view_route_id)
-    : WebWorkerBase(child_thread,
-                    document_id,
-                    exists ? route_id : MSG_ROUTING_NONE,
-                    render_view_route_id,
-                    0),
+    : route_id_(exists ? route_id : MSG_ROUTING_NONE),
+      render_view_route_id_(render_view_route_id),
+      child_thread_(child_thread),
+      document_id_(document_id),
       pending_route_id_(route_id),
       connect_listener_(NULL) {
+  if (route_id_ != MSG_ROUTING_NONE)
+    child_thread_->AddRoute(route_id_, this);
+}
+
+WebSharedWorkerProxy::~WebSharedWorkerProxy() {
+  Disconnect();
+
+  // Free up any unsent queued messages.
+  for (size_t i = 0; i < queued_messages_.size(); ++i)
+    delete queued_messages_[i];
+}
+
+void WebSharedWorkerProxy::Disconnect() {
+  if (route_id_ == MSG_ROUTING_NONE)
+    return;
+
+  // So the messages from WorkerContext (like WorkerContextDestroyed) do not
+  // come after nobody is listening. Since Worker and WorkerContext can
+  // terminate independently, already sent messages may still be in the pipe.
+  child_thread_->RemoveRoute(route_id_);
+
+  route_id_ = MSG_ROUTING_NONE;
+}
+
+void WebSharedWorkerProxy::CreateWorkerContext(const GURL& script_url,
+                                        bool is_shared,
+                                        const string16& name,
+                                        const string16& user_agent,
+                                        const string16& source_code,
+                                        int pending_route_id,
+                                        int64 script_resource_appcache_id) {
+  DCHECK(route_id_ == MSG_ROUTING_NONE);
+  ViewHostMsg_CreateWorker_Params params;
+  params.url = script_url;
+  params.name = name;
+  params.document_id = document_id_;
+  params.render_view_route_id = render_view_route_id_;
+  params.route_id = pending_route_id;
+  params.script_resource_appcache_id = script_resource_appcache_id;
+  IPC::Message* create_message = new ViewHostMsg_CreateWorker(
+      params, &route_id_);
+  child_thread_->Send(create_message);
+  if (route_id_ == MSG_ROUTING_NONE)
+    return;
+
+  child_thread_->AddRoute(route_id_, this);
+
+  // We make sure that the start message is the first, since postMessage or
+  // connect might have already been called.
+  queued_messages_.insert(queued_messages_.begin(),
+      new WorkerMsg_StartWorkerContext(
+          route_id_, script_url, user_agent, source_code));
+}
+
+bool WebSharedWorkerProxy::IsStarted() {
+  // Worker is started if we have a route ID and there are no queued messages
+  // (meaning we've sent the WorkerMsg_StartWorkerContext already).
+  return (route_id_ != MSG_ROUTING_NONE && queued_messages_.empty());
+}
+
+bool WebSharedWorkerProxy::Send(IPC::Message* message) {
+  // It's possible that messages will be sent before the worker is created, in
+  // which case route_id_ will be none.  Or the worker object can be interacted
+  // with before the browser process told us that it started, in which case we
+  // also want to queue the message.
+  if (!IsStarted()) {
+    queued_messages_.push_back(message);
+    return true;
+  }
+
+  // For now we proxy all messages to the worker process through the browser.
+  // Revisit if we find this slow.
+  // TODO(jabdelmalek): handle sync messages if we need them.
+  IPC::Message* wrapped_msg = new ViewHostMsg_ForwardToWorker(*message);
+  delete message;
+  return child_thread_->Send(wrapped_msg);
+}
+
+void WebSharedWorkerProxy::SendQueuedMessages() {
+  DCHECK(queued_messages_.size());
+  std::vector<IPC::Message*> queued_messages = queued_messages_;
+  queued_messages_.clear();
+  for (size_t i = 0; i < queued_messages.size(); ++i) {
+    queued_messages[i]->set_routing_id(route_id_);
+    Send(queued_messages[i]);
+  }
 }
 
 bool WebSharedWorkerProxy::isStarted() {
   return IsStarted();
 }
 
 void WebSharedWorkerProxy::startWorkerContext(
     const WebKit::WebURL& script_url,
     const WebKit::WebString& name,
     const WebKit::WebString& user_agent,
     const WebKit::WebString& source_code,
     long long script_resource_appcache_id) {
   DCHECK(!isStarted());
-  CreateSharedWorkerContext(script_url, name, user_agent, source_code,
-                            pending_route_id_, script_resource_appcache_id);
+  CreateWorkerContext(script_url, true, name, user_agent, source_code,
+                      pending_route_id_, script_resource_appcache_id);
 }
 
 void WebSharedWorkerProxy::terminateWorkerContext() {
   // This API should only be invoked from worker context.
   NOTREACHED();
 }
 
 void WebSharedWorkerProxy::clientDestroyed() {
   // This API should only be invoked from worker context.
   NOTREACHED();
@@ skipping 31 matching lines @@
   // The worker is created - now send off the CreateWorkerContext message and
   // any other queued messages
   SendQueuedMessages();
 
   // Inform any listener that the pending connect event has been sent
   // (this can result in this object being freed).
   if (connect_listener_) {
     connect_listener_->connected();
   }
 }