Browser Plugin: New Implementation (Browser Side)

content/browser/browser_plugin/browser_plugin_embedder_helper.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_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_HELPER_H_
+#define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_HELPER_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "content/public/browser/render_view_host_observer.h"
+
+namespace IPC {
+class Message;
+class SyncMessage;
+}
+
+namespace gfx {
+class Size;
+}
+
+struct BrowserPluginHostMsg_ResizeGuest_Params;
+
+namespace content {
+
+class BrowserPluginEmbedder;
+class RenderViewHost;
+
+// Helper for browser plugin embedder.
+//
+// A lot of messages coming from guests need to know the guest's RenderViewHost.
+// BrowserPluginEmbedderHelper handles BrowserPluginHostMsg messages and
+// relays them with their associated RenderViewHosts to its delegate where they
+// will be handled.
+//
+// A BrowserPluginEmbedderHelper is created whenever a BrowserPluginEmbedder is
+// created. BrowserPluginEmbedder's lifetime is managed by the associated
+// RenderViewHost. Functions in this class is assumed to be run on UI thread.
+class BrowserPluginEmbedderHelper : public RenderViewHostObserver {
+ public:
+  BrowserPluginEmbedderHelper(BrowserPluginEmbedder* embedder,
+                              RenderViewHost* render_view_host);
+  virtual ~BrowserPluginEmbedderHelper();
+
+  // Make it public for sync IPCs.
+  virtual bool Send(IPC::Message* message) OVERRIDE;
+
+ protected:
+  // RenderViewHostObserver implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ private:
+  // Message handlers.
+  void OnNavigateGuest(int instance_id,
+                       int64 frame_id,
+                       const std::string& src,
+                       const gfx::Size& size);
+  void OnResizeGuest(int instance_id,
+                     const BrowserPluginHostMsg_ResizeGuest_Params& params);
+  void OnUpdateRectACK(int instance_id, int message_id, const gfx::Size& size);
+  void OnHandleInputEvent(const IPC::SyncMessage& message, bool* handled);
+  void OnSetFocus(int instance_id, bool focused);
+  void OnPluginDestroyed(int instance_id);
+
+  BrowserPluginEmbedder* embedder_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedderHelper);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_HELPER_H_