[CRD iOS] Add support for three-finger gestures

remoting/client/gesture_interpreter.cc

Index: remoting/client/gesture_interpreter.cc
diff --git a/remoting/client/gesture_interpreter.cc b/remoting/client/gesture_interpreter.cc
index 8f5eac204f5cb5fbf20e9ae008929e998d8f61c1..c5ae59278851fd1d6277f2b544af4cd0af6b4acf 100644
--- a/remoting/client/gesture_interpreter.cc
+++ b/remoting/client/gesture_interpreter.cc
@@ -76,25 +76,19 @@ void GestureInterpreter::Pan(float translation_x, float translation_y) {
 void GestureInterpreter::Tap(float x, float y) {
   AbortAnimations();
 
-  if (!input_strategy_->TrackTouchInput({x, y}, viewport_)) {
-    return;
-  }
-  ViewMatrix::Point cursor_position = input_strategy_->GetCursorPosition();
-  StartInputFeedback(cursor_position.x, cursor_position.y,
-                     InputStrategy::TAP_FEEDBACK);
-  InjectMouseClick(cursor_position.x, cursor_position.y,
-                   protocol::MouseEvent_MouseButton_BUTTON_LEFT);
+  InjectMouseClick(x, y, protocol::MouseEvent_MouseButton_BUTTON_LEFT);
 }
 
 void GestureInterpreter::TwoFingerTap(float x, float y) {
   AbortAnimations();
 
-  if (!input_strategy_->TrackTouchInput({x, y}, viewport_)) {
-    return;
-  }
-  ViewMatrix::Point cursor_position = input_strategy_->GetCursorPosition();
-  InjectMouseClick(cursor_position.x, cursor_position.y,
-                   protocol::MouseEvent_MouseButton_BUTTON_RIGHT);
+  InjectMouseClick(x, y, protocol::MouseEvent_MouseButton_BUTTON_RIGHT);
+}
+
+void GestureInterpreter::ThreeFingerTap(float x, float y) {
+  AbortAnimations();
+
+  InjectMouseClick(x, y, protocol::MouseEvent_MouseButton_BUTTON_MIDDLE);
 }
 
 void GestureInterpreter::Drag(float x, float y, GestureState state) {
@@ -193,11 +187,20 @@ void GestureInterpreter::AbortAnimations() {
 }
 
 void GestureInterpreter::InjectMouseClick(
-    float x,
-    float y,
+    float touch_x,
+    float touch_y,
     protocol::MouseEvent_MouseButton button) {
-  input_stub_->SendMouseEvent(x, y, button, true);
-  input_stub_->SendMouseEvent(x, y, button, false);
+  if (!input_strategy_->TrackTouchInput({touch_x, touch_y}, viewport_)) {
+    return;
+  }
+  ViewMatrix::Point cursor_position = input_strategy_->GetCursorPosition();
+  StartInputFeedback(cursor_position.x, cursor_position.y,
+                     InputStrategy::TAP_FEEDBACK);
+
+  input_stub_->SendMouseEvent(cursor_position.x, cursor_position.y, button,
+                              true);
+  input_stub_->SendMouseEvent(cursor_position.x, cursor_position.y, button,
+                              false);
 }
 
 void GestureInterpreter::SetGestureInProgress(InputStrategy::Gesture gesture,