refactoring mouse lock to support pepper and WebKit

content/renderer/pepper_plugin_delegate_impl.h

 // Copyright (c) 2011 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_PEPPER_PLUGIN_DELEGATE_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PLUGIN_DELEGATE_IMPL_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 171 matching lines @@
   bool CanComposeInline() const;
 
   // IME events.
   void OnImeSetComposition(
       const string16& text,
       const std::vector<WebKit::WebCompositionUnderline>& underlines,
       int selection_start,
       int selection_end);
   void OnImeConfirmComposition(const string16& text);
 
-  // Notification that the request to lock the mouse has completed.
-  void OnLockMouseACK(bool succeeded);
-  // Notification that the plugin instance has lost the mouse lock.
-  void OnMouseLockLost();
   // Notification that a mouse event has arrived at the render view.
-  // Returns true if no further handling is needed. For example, if the mouse is
-  // currently locked, this method directly dispatches the event to the owner of
-  // the mouse lock and returns true.
-  bool HandleMouseEvent(const WebKit::WebMouseEvent& event);
+  void WillHandleMouseEvent();
 
   // PluginDelegate implementation.
   virtual void PluginFocusChanged(webkit::ppapi::PluginInstance* instance,
                                   bool focused) OVERRIDE;
   virtual void PluginTextInputTypeChanged(
       webkit::ppapi::PluginInstance* instance) OVERRIDE;
   virtual void PluginCaretPositionChanged(
       webkit::ppapi::PluginInstance* instance) OVERRIDE;
   virtual void PluginRequestedCancelComposition(
       webkit::ppapi::PluginInstance* instance) OVERRIDE;
@@ skipping 157 matching lines @@
   virtual void DidStartLoading() OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
   virtual void SetContentRestriction(int restrictions) OVERRIDE;
   virtual void SaveURLAs(const GURL& url) OVERRIDE;
   virtual webkit_glue::P2PTransport* CreateP2PTransport() OVERRIDE;
   virtual double GetLocalTimeZoneOffset(base::Time t) OVERRIDE;
   virtual std::string GetFlashCommandLineArgs() OVERRIDE;
   virtual base::SharedMemory* CreateAnonymousSharedMemory(uint32_t size)
       OVERRIDE;
   virtual ::ppapi::Preferences GetPreferences() OVERRIDE;
-  virtual void LockMouse(webkit::ppapi::PluginInstance* instance) OVERRIDE;
+  virtual bool LockMouse(webkit::ppapi::PluginInstance* instance) OVERRIDE;
   virtual void UnlockMouse(webkit::ppapi::PluginInstance* instance) OVERRIDE;
   virtual void DidChangeCursor(webkit::ppapi::PluginInstance* instance,
                                const WebKit::WebCursorInfo& cursor) OVERRIDE;
   virtual void DidReceiveMouseEvent(
       webkit::ppapi::PluginInstance* instance) OVERRIDE;
   virtual bool IsInFullscreenMode() OVERRIDE;
 
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnDestruct() OVERRIDE;
@@ skipping 27 matching lines @@
                               const std::string& data,
                               const PP_NetAddress_Private& addr);
 
   CONTENT_EXPORT int GetRoutingId() const;
 
  private:
   // Asynchronously attempts to create a PPAPI broker for the given plugin.
   scoped_refptr<PpapiBrokerImpl> CreatePpapiBroker(
       webkit::ppapi::PluginModule* plugin_module);
 
-  bool MouseLockedOrPending() const {
-    return mouse_locked_ || pending_lock_request_ || pending_unlock_request_;
-  }
-
   // Implementation of PepperParentContextProvider.
   virtual RendererGLContext* GetParentContextForPlatformContext3D() OVERRIDE;
 
   // Helper function to check that TCP/UDP private APIs are allowed for current
   // page. This check actually allows socket usage for NativeClient code only.
   // It is better to move this check to browser process but Pepper message
   // filters in browser process have no context about page that sent
   // the request. Doing this check in render process is safe because NaCl code
   // is executed in separate NaCl process.
   // TODO(dpolukhin, yzshen): make the check consistent for in- and out-process
@@ skipping 24 matching lines @@
   typedef IDMap<scoped_refptr<PpapiBrokerImpl>, IDMapOwnPointer> BrokerMap;
   BrokerMap pending_connect_broker_;
 
   // Whether or not the focus is on a PPAPI plugin
   webkit::ppapi::PluginInstance* focused_plugin_;
 
   // Current text input composition text. Empty if no composition is in
   // progress.
   string16 composition_text_;
 
-  // |mouse_lock_owner_| is not owned by this class. We can know about when it
-  // is destroyed via InstanceDeleted().
-  // |mouse_lock_owner_| being non-NULL doesn't indicate that currently the
-  // mouse has been locked. It is possible that a request to lock the mouse has
-  // been sent, but the response hasn't arrived yet.
-  webkit::ppapi::PluginInstance* mouse_lock_owner_;
-  bool mouse_locked_;
-  // If both |pending_lock_request_| and |pending_unlock_request_| are true,
-  // it means a lock request was sent before an unlock request and we haven't
-  // received responses for them.
-  // The logic in LockMouse() makes sure that a lock request won't be sent when
-  // there is a pending unlock request.
-  bool pending_lock_request_;
-  bool pending_unlock_request_;
-
   // The plugin instance that received the last mouse event. It is set to NULL
   // if the last mouse event went to elements other than Pepper plugins.
   // |last_mouse_event_target_| is not owned by this class. We can know about
   // when it is destroyed via InstanceDeleted().
   webkit::ppapi::PluginInstance* last_mouse_event_target_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperPluginDelegateImpl);
 };
 
 #endif  // CONTENT_RENDERER_PEPPER_PLUGIN_DELEGATE_IMPL_H_