Browser Plugin: Renderer-side changes

content/renderer/browser_plugin/browser_plugin_channel_manager.h

+// Copyright (c) 2012 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.
+
+#ifndef CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_CHANNEL_MANAGER_H_
+#define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_CHANNEL_MANAGER_H_
+#pragma once
+
+#include <set>
+
+#include "base/id_map.h"
+#include "content/public/renderer/render_process_observer.h"
+#include "content/renderer/browser_plugin/guest_to_embedder_channel.h"
+#include "content/renderer/render_view_impl.h"
+
+class GuestToEmbedderChannel;
+struct ViewMsg_New_Params;
+
+namespace content {
+
+// BrowserPluginChannelManager manages the lifetime of GuestToEmbedderChannels.
+// When a new RenderView is requested, it checks the embedder channel name
+// in ViewMsg_New_Params and decides whether to reuse an existing channel or
+// create a new channel. On the guest renderer process, it informs a
+// RenderView once a channel has been established with its embedder.
+// On the embedder side, it tells BrowserPlugin to load the guest
+// PluginInstance once a channel has been established.
+class BrowserPluginChannelManager
+    : public RenderProcessObserver {
+ public:
+  BrowserPluginChannelManager();
+
+  virtual ~BrowserPluginChannelManager();
+
+  void CreateRenderView(const ViewMsg_New_Params& params);
+
+  // Get the GuestToEmbedderChannel associated with the given
+  // embedder_channel_name.
+  GuestToEmbedderChannel* GetChannelByName(
+      const std::string& embedder_channel_name);
+
+  // Remove the pointer to the GuestToEmbedderChannel associated with the given
+  // routing_id.
+  void RemoveChannelByName(const std::string& embedder_channel_name);
+
+ private:
+  typedef std::map<std::string, scoped_refptr<GuestToEmbedderChannel> >
+      EmbedderChannelNameToChannelMap;
+
+  void OnCompleteNavigation(int guest_routing_id,
+                            PP_Instance instance);
+
+  void OnLoadGuest(int instance_id,
+                   int guest_renderer_id,
+                   const IPC::ChannelHandle& channel_handle);
+
+  // RenderProcessObserver override. Call on render thread.
+  virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // Map from Host process ID to GuestToEmbedderChannel
+  EmbedderChannelNameToChannelMap embedder_channels_;
+
+  std::map<int, base::WeakPtr<RenderViewImpl> > pending_navigations_;

[Charlie Reis, 2012/05/17 20:36:47]

Please comment what this is used for.

[Fady Samuel, 2012/05/17 22:18:03]

Done. Renamed to pending_guests_ too because pending_navigations_ was a bit
misleading. Navigation has started but the guest cannot composite yet because it
doesn't have a PP_Instance yet.

+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginChannelManager);
+};
+
+}  // namespace content
+
+#endif //  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_CHANNEL_MANAGER_H_