Mouse lock implementation, including the renderer side and the Windows version of the browser side.

content/renderer/pepper_plugin_delegate_impl.h

Index: content/renderer/pepper_plugin_delegate_impl.h
diff --git a/content/renderer/pepper_plugin_delegate_impl.h b/content/renderer/pepper_plugin_delegate_impl.h
index b254488cf45a68a221affe3bdd8c439c4e99ac5f..ede76c49e46ba07048dbcd16f72ed657cf62ca68 100644
--- a/content/renderer/pepper_plugin_delegate_impl.h
+++ b/content/renderer/pepper_plugin_delegate_impl.h
@@ -44,6 +44,7 @@ class PluginModule;
 
 namespace WebKit {
 class WebFileChooserCompletion;
+class WebInputEvent;
 struct WebFileChooserParams;
 }
 
@@ -165,6 +166,15 @@ class PepperPluginDelegateImpl
   // Returns whether or not a Pepper plugin is focused.
   bool IsPluginFocused() const;
 
+  // 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();
+  // Dispatches mouse events directly to the owner of the mouse lock.
+  // True indicates currently the mouse is locked and the event has been
+  // dispatched to the owner.
+  bool DispatchLockedMouseEvent(const WebKit::WebInputEvent& event);
+
   // PluginDelegate implementation.
   virtual void PluginFocusChanged(bool focused) OVERRIDE;
   virtual void PluginCrashed(webkit::ppapi::PluginInstance* instance);
@@ -302,6 +312,8 @@ class PepperPluginDelegateImpl
   virtual base::SharedMemory* CreateAnonymousSharedMemory(uint32_t size)
       OVERRIDE;
   virtual ::ppapi::Preferences GetPreferences() OVERRIDE;
+  virtual void LockMouse(webkit::ppapi::PluginInstance* instance) OVERRIDE;
+  virtual void UnlockMouse(webkit::ppapi::PluginInstance* instance) OVERRIDE;
 
   int GetRoutingId() const;
 
@@ -314,6 +326,10 @@ class PepperPluginDelegateImpl
   scoped_refptr<PpapiBrokerImpl> CreatePpapiBroker(
       webkit::ppapi::PluginModule* plugin_module);
 
+  bool UsingMouseLock() const {

[scheib, 2011/09/09 22:00:06]

nit: Consider name, "MouseLockedOrPending"?

[yzshen1, 2011/09/09 23:16:04]

Done.

+    return mouse_locked_ || pending_lock_request_ || pending_unlock_request_;
+  }
+
   // Pointer to the RenderView that owns us.
   RenderView* render_view_;
 
@@ -344,6 +360,21 @@ class PepperPluginDelegateImpl
   // been updated.
   std::set<webkit::ppapi::PluginInstance*> subscribed_to_policy_updates_;
 
+  // |mouse_lock_owner_| is not owned by this class. We can know about when it
+  // is destroyed via InstanceDeleted().
+  // |mouse_lock_owner_| is not 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_;
+
   DISALLOW_COPY_AND_ASSIGN(PepperPluginDelegateImpl);
 };