Clear pending events upon main frame navigation

content/browser/renderer_host/render_widget_host_impl.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_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 338 matching lines @@
     return input_method_active_;
   }
 
   // Whether forwarded WebInputEvents should be ignored.  True if either
   // |ignore_input_events_| or |process_->IgnoreInputEvents()| is true.
   bool IgnoreInputEvents() const;
 
   // Event queries delegated to the |input_router_|.
   bool ShouldForwardTouchEvent() const;
 
-  bool has_touch_handler() const { return has_touch_handler_; }
-
   // Notification that the user has made some kind of input that could
   // perform an action. See OnUserGesture for more details.
   void StartUserGesture();
 
   // Set the RenderView background transparency.
   void SetBackgroundOpaque(bool opaque);
 
   // Notifies the renderer that the next key event is bound to one or more
   // pre-defined edit commands
   void SetEditCommandsForNextKeyEvent(
@@ skipping 49 matching lines @@
 
   void DetachDelegate();
 
   // Update the renderer's cache of the screen rect of the view and window.
   void SendScreenRects();
 
   // Suppreses future char events until a keydown. See
   // suppress_next_char_events_.
   void SuppressNextCharEvents();
 
-  // Called by RenderWidgetHostView in response to OnSetNeedsFlushInput.
+  // Clear any pending input events, preparing for a new input event stream.
+  // This method should be called any time an action (either in the browser
+  // or the renderer) renders potentially buffered events as invalid for the
+  // current target, e.g., main frame navigation.
+  void ResetPendingInput();
+
+  // Called by the view in response to flush requests.
   void FlushInput();
 
-  // InputRouterClient
-  void SetNeedsFlush() override;
+  // Request an input flush from the view.
+  void SetNeedsFlushInput();
 
   // Indicates whether the renderer drives the RenderWidgetHosts's size or the
   // other way around.
   bool should_auto_resize() { return should_auto_resize_; }
 
   void FrameSwapped(const ui::LatencyInfo& latency_info);
   void DidReceiveRendererFrame();
 
   // Returns the ID that uniquely describes this component to the latency
   // subsystem.
@@ skipping 133 matching lines @@
   void Destroy();
 
   // Called by |hang_timeout_monitor_| on delayed response from the renderer.
   void RendererIsUnresponsive();
 
   // Called if we know the renderer is responsive. When we currently think the
   // renderer is unresponsive, this will clear that state and call
   // NotifyRendererResponsive.
   void RendererIsResponsive();
 
+  // Recreate the input router, e.g., when the render process has crashed.
+  void ResetInputRouter();
+
   // IPC message handlers
   void OnRenderViewReady();
   void OnRenderProcessGone(int status, int error_code);
   void OnClose();
   void OnUpdateScreenRectsAck();
   void OnRequestMove(const gfx::Rect& pos);
   void OnSetTooltipText(const base::string16& tooltip_text,
                         blink::WebTextDirection text_direction_hint);
   bool OnSwapCompositorFrame(const IPC::Message& message);
   void OnFlingingStopped();
@@ skipping 42 matching lines @@
   // Give key press listeners a chance to handle this key press. This allow
   // widgets that don't have focus to still handle key presses.
   bool KeyPressListenersHandleEvent(const NativeWebKeyboardEvent& event);
 
   // InputRouterClient
   InputEventAckState FilterInputEvent(
       const blink::WebInputEvent& event,
       const ui::LatencyInfo& latency_info) override;
   void IncrementInFlightEventCount() override;
   void DecrementInFlightEventCount() override;
-  void OnHasTouchEventHandlers(bool has_handlers) override;
   void DidFlush() override;
   void DidOverscroll(const DidOverscrollParams& params) override;
 
   // InputAckHandler
   void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
                           InputEventAckState ack_result) override;
   void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
                        InputEventAckState ack_result) override;
   void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
                        InputEventAckState ack_result) override;
@@ skipping 150 matching lines @@
   // For example, pressing alt-2 may let the browser switch to the second tab,
   // but the Char event generated by alt-2 may also activate a HTML element
   // if its accesskey happens to be "2", then the user may get confused when
   // switching back to the original tab, because the content may already be
   // changed.
   bool suppress_next_char_events_;
 
   bool pending_mouse_lock_request_;
   bool allow_privileged_mouse_lock_;
 
-  // Keeps track of whether the webpage has any touch event handler. If it does,
-  // then touch events are sent to the renderer. Otherwise, the touch events are
-  // not sent to the renderer.
-  bool has_touch_handler_;
-
   scoped_ptr<SyntheticGestureController> synthetic_gesture_controller_;
 
   scoped_ptr<TouchEmulator> touch_emulator_;
 
   // Receives and handles all input events.
   scoped_ptr<InputRouter> input_router_;
 
   scoped_ptr<TimeoutMonitor> hang_monitor_timeout_;
 
 #if defined(OS_WIN)
@@ skipping 10 matching lines @@
   cc::RollingTimeDeltaHistory browser_composite_latency_history_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_