Browser Plugin: New Implementation (Browser Side)

content/browser/browser_plugin/browser_plugin_guest_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_GUEST_HELPER_H_
+#define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_HELPER_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "content/browser/browser_plugin/browser_plugin_guest.h"
+#include "content/public/browser/render_view_host_observer.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/notification_registrar.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;
+
+// Helper for browser plugin guest.
+// It overrides different WebContents messages that require special treatment
+// for a WebContents to act as a guest. All functionalities are handled by its
+// delegate, this class exists so we have separation of messages it handles,

[Charlie Reis, 2012/08/27 20:23:59]

nit: delegate.  This class
(or use a semicolon)

[lazyboy, 2012/08/28 19:07:14]

Done.

+// which can be move to a message filter (IPC thread) for future optimization.
+class BrowserPluginGuestHelper : public RenderViewHostObserver {
+ public:
+  BrowserPluginGuestHelper(BrowserPluginGuest* guest,
+                           RenderViewHost* render_view_host);
+  virtual ~BrowserPluginGuestHelper();
+
+ private:
+  // Message handlers
+  void OnUpdateRect(const ViewHostMsg_UpdateRect_Params& params);
+  void OnHandleInputEventAck(WebKit::WebInputEvent::Type event_type,
+    bool processed);
+  void OnTakeFocus(bool reverse);
+  void OnShowWidget(int route_id, const gfx::Rect& initial_pos);
+  void OnSetCursor(const WebCursor& cursor);
+
+  // RenderViewHostObserver implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  BrowserPluginGuest* guest_;
+  // A scoped container for notification registries.
+  NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuestHelper);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_HELPER_H_