Browser Plugin: New Implementation (Browser Side)

content/browser/browser_plugin/browser_plugin_host_embedder_role.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_HOST_EMBEDDER_ROLE_H_
+#define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_HOST_EMBEDDER_ROLE_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "content/browser/browser_plugin/browser_plugin_host_embedder_delegate.h"
+#include "content/browser/browser_plugin/browser_plugin_host_role.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/render_view_host_observer.h"
+#include "ipc/ipc_channel_handle.h"
+#include "ipc/ipc_sync_message.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
+#include "ui/surface/transport_dib.h"
+#include "webkit/glue/webcursor.h"
+
+namespace gfx {
+class Size;
+}
+
+struct BrowserPluginHostMsg_ResizeGuest_Params;
+struct ViewHostMsg_UpdateRect_Params;
+
+namespace content {
+
+class RenderViewHost;
+
+// Role for browser plugin embedder.
+// A class having such a role means it is assuming the role of an embedder, i.e.
+// it can embed zero to many guest browser plugins. A lot of messages coming
+// from guests need to know the guest's RenderViewHost.
+// BrowserPluginHostEmbedderRole handles BrowserPluginHostMsg messages and
+// relays them with their associated RenderViewHosts to its delegate where they
+// will be handled.
+class BrowserPluginHostEmbedderRole : public BrowserPluginHostRole,
+                                      public RenderViewHostObserver,
+                                      public NotificationObserver {
+ public:
+  BrowserPluginHostEmbedderRole(WebContentsImpl* web_contents,
+                                RenderViewHost* render_view_host);
+  virtual ~BrowserPluginHostEmbedderRole();
+
+  // Make it public for sync IPCs.
+  virtual bool Send(IPC::Message* message) OVERRIDE;
+  void NavigateGuest(int instance_id, int64 frame_id, const std::string& src,
+                     const gfx::Size& size);
+  BrowserPluginHostEmbedderDelegate* GetDelegate() {
+    return delegate_.get();
+  }
+
+ 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);
+
+  // RenderViewHostObserver implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // NotificationObserver method override.
+  virtual void Observe(int type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details) OVERRIDE;
+
+  scoped_ptr<BrowserPluginHostEmbedderDelegate> delegate_;
+  // A scoped container for notification registries.
+  NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginHostEmbedderRole);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_HOST_EMBEDDER_ROLE_H_