[CRD iOS] Hook the touch input feedback

remoting/client/input_strategy.h

Index: remoting/client/input_strategy.h
diff --git a/remoting/client/input_strategy.h b/remoting/client/input_strategy.h
index 5f171681a61f96514eab8f3d795be789ed2ef1f1..8f14581b4cbf424422783b0493c48e2526432755 100644
--- a/remoting/client/input_strategy.h
+++ b/remoting/client/input_strategy.h
@@ -13,6 +13,11 @@ class DesktopViewport;
 // are handled.
 class InputStrategy {
  public:
+  enum InputFeedbackType {
+    TAP_FEEDBACK,
+    LONG_PRESS_FEEDBACK,
+  };
+
   virtual ~InputStrategy() {}
 
   // Called when the GestureInterpreter receives a pinch gesture. The
@@ -33,14 +38,21 @@ class InputStrategy {
                          bool is_dragging_mode,
                          DesktopViewport* viewport) = 0;
 
-  // Called when a gesture is done at location (touch_x, touch_y) and the
-  // GestureInterpreter needs to get back the cursor position to inject mouse
-  // the mouse event.
-  virtual void FindCursorPositions(float touch_x,
-                                   float touch_y,
-                                   const DesktopViewport& viewport,
-                                   float* cursor_x,
-                                   float* cursor_y) = 0;
+  // Called when a touch input (which will end up injecting a mouse event at
+  // certain position in the host) is done at location (touch_x, touch_y).
+  // The implementation should move the cursor to proper position.
+  virtual void TrackTouchInput(float touch_x,
+                               float touch_y,
+                               const DesktopViewport& viewport) = 0;
+
+  // Writes the cursor position to cursor_x and cursor_y.
+  virtual void GetCursorPosition(float* cursor_x, float* cursor_y) const = 0;
+
+  // Returns the maximum radius of the feedback animation on the surface's
+  // coordinate for the given input type. The feedback will then be shown on the
+  // cursor positions returned by FindCursorPositions(). Return 0 if no feedback
+  // should be shown.
+  virtual float GetFeedbackRadius(InputFeedbackType type) const = 0;
 
   // Returns true if the input strategy maintains a visible cursor on the
   // desktop.