[DevTools] Touch emulation in content.

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>
 #include <queue>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/process/kill.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "build/build_config.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
 #include "content/browser/renderer_host/input/input_router_client.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
+#include "content/browser/renderer_host/input/touch_emulator_client.h"
 #include "content/common/input/synthetic_gesture_packet.h"
 #include "content/common/view_message_enums.h"
 #include "content/port/browser/event_with_latency_info.h"
 #include "content/port/common/input_event_ack_state.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/common/page_zoom.h"
 #include "ipc/ipc_listener.h"
 #include "ui/base/ime/text_input_mode.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/events/latency_info.h"
@@ skipping 38 matching lines @@
 
 namespace content {
 class BackingStore;
 class InputRouter;
 class MockRenderWidgetHost;
 class OverscrollController;
 class RenderWidgetHostDelegate;
 class RenderWidgetHostViewPort;
 class SyntheticGestureController;
 class TimeoutMonitor;
+class TouchEmulator;
 class WebCursor;
 struct EditCommand;
 
 // This implements the RenderWidgetHost interface that is exposed to
 // embedders of content, and adds things only visible to content.
 class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
                                             public InputRouterClient,
                                             public InputAckHandler,
+                                            public TouchEmulatorClient,
                                             public IPC::Listener {
  public:
   // routing_id can be MSG_ROUTING_NONE, in which case the next available
   // routing id is taken from the RenderProcessHost.
   // If this object outlives |delegate|, DetachDelegate() must be called when
   // |delegate| goes away.
   RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
                        RenderProcessHost* process,
                        int routing_id,
                        bool hidden);
@@ skipping 186 matching lines @@
   // the new one will only fire if it has a shorter delay than the time
   // left on the existing timeouts.
   void StartHangMonitorTimeout(base::TimeDelta delay);
 
   // Stops all existing hang monitor timeouts and assumes the renderer is
   // responsive.
   void StopHangMonitorTimeout();
 
   // Forwards the given message to the renderer. These are called by the view
   // when it has received a message.
-  void ForwardGestureEvent(const blink::WebGestureEvent& gesture_event);
+  // Some of these methods are TouchEmulatorClient overrides.
+  virtual void ForwardGestureEvent(

[jdduke (slow), 2014/04/07 18:12:37]

It's OK to re-order the TouchEmulatorClient specific methods into a single
grouping here, particularly if you add the method |ForwardTouchEvent| that does
the same logical thing as |ForwardGestureEvent|.

[dgozman, 2014/04/08 16:56:49]

Done.

+      const blink::WebGestureEvent& gesture_event) OVERRIDE;
   void ForwardGestureEventWithLatencyInfo(
       const blink::WebGestureEvent& gesture_event,
       const ui::LatencyInfo& ui_latency);
-  void ForwardTouchEventWithLatencyInfo(
+  virtual void ForwardTouchEventWithLatencyInfo(
       const blink::WebTouchEvent& touch_event,
-      const ui::LatencyInfo& ui_latency);
+      const ui::LatencyInfo& ui_latency) OVERRIDE;
   void ForwardMouseEventWithLatencyInfo(
       const blink::WebMouseEvent& mouse_event,
       const ui::LatencyInfo& ui_latency);
   void ForwardWheelEventWithLatencyInfo(
       const blink::WebMouseWheelEvent& wheel_event,
       const ui::LatencyInfo& ui_latency);
 
+  // Sets cursor to the view. TouchEmulatorClient override.
+  virtual void SetCursor(const WebCursor& cursor) OVERRIDE;
+
   // Queues a synthetic gesture for testing purposes.  Invokes the on_complete
   // callback when the gesture is finished running.
   void QueueSyntheticGesture(
       scoped_ptr<SyntheticGesture> synthetic_gesture,
       const base::Callback<void(SyntheticGesture::Result)>& on_complete);
 
   void CancelUpdateTextDirection();
 
   // Called when a mouse click/gesture tap activates the renderer.
   virtual void OnPointerEventActivate();
@@ skipping 336 matching lines @@
   bool OnSwapCompositorFrame(const IPC::Message& message);
   void OnOverscrolled(gfx::Vector2dF accumulated_overscroll,
                       gfx::Vector2dF current_fling_velocity);
   void OnFlingingStopped();
   void OnUpdateRect(const ViewHostMsg_UpdateRect_Params& params);
   void OnUpdateIsDelayed();
   void OnQueueSyntheticGesture(const SyntheticGesturePacket& gesture_packet);
   virtual void OnFocus();
   virtual void OnBlur();
   void OnSetCursor(const WebCursor& cursor);
+  void OnSetTouchEventEmulationEnabled(bool enabled);
   void OnTextInputTypeChanged(ui::TextInputType type,
                               ui::TextInputMode input_mode,
                               bool can_compose_inline);
 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
   void OnImeCompositionRangeChanged(
       const gfx::Range& range,
       const std::vector<gfx::Rect>& character_bounds);
 #endif
   void OnImeCancelComposition();
   void OnDidActivateAcceleratedCompositing(bool activated);
@@ skipping 228 matching lines @@
 
   // 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_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   scoped_ptr<SyntheticGestureController> synthetic_gesture_controller_;
 
+  scoped_ptr<TouchEmulator> touch_emulator_;
+
   // Receives and handles all input events.
   scoped_ptr<InputRouter> input_router_;
 
   scoped_ptr<OverscrollController> overscroll_controller_;
 
   scoped_ptr<TimeoutMonitor> hang_monitor_timeout_;
 
 #if defined(OS_WIN)
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
   // List of callbacks for pending snapshot requests to the renderer.
   std::queue<base::Callback<void(bool, const SkBitmap&)> > pending_snapshots_;
 
   int64 last_input_number_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_