Generate tap gesture with tap_count = 3 for triple-tap

ash/touch/touch_uma.cc

 // 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.
 
 #include "ash/touch/touch_uma.h"
 
 #include "ash/shell_delegate.h"
 #include "base/metrics/histogram.h"
 #include "base/stringprintf.h"
 #include "ui/aura/env.h"
@@ skipping 39 matching lines @@
   UMA_ET_TOUCH_STATIONARY,
   UMA_ET_TOUCH_CANCELLED,
   UMA_ET_GESTURE_SCROLL_BEGIN,
   UMA_ET_GESTURE_SCROLL_END,
   UMA_ET_GESTURE_SCROLL_UPDATE,
   UMA_ET_GESTURE_TAP,
   UMA_ET_GESTURE_TAP_DOWN,
   UMA_ET_GESTURE_BEGIN,
   UMA_ET_GESTURE_END,
   UMA_ET_GESTURE_DOUBLE_TAP,
+  UMA_ET_GESTURE_TRIPLE_TAP,
   UMA_ET_GESTURE_TWO_FINGER_TAP,
   UMA_ET_GESTURE_PINCH_BEGIN,
   UMA_ET_GESTURE_PINCH_END,
   UMA_ET_GESTURE_PINCH_UPDATE,
   UMA_ET_GESTURE_LONG_PRESS,
   UMA_ET_GESTURE_MULTIFINGER_SWIPE,
   UMA_ET_SCROLL,
   UMA_ET_SCROLL_FLING_START,
   UMA_ET_SCROLL_FLING_CANCEL,
   UMA_ET_GESTURE_MULTIFINGER_SWIPE_3,
@@ skipping 124 matching lines @@
       else if (gesture.details().touch_points() == 2)
         return UMA_ET_GESTURE_SCROLL_UPDATE_2;
       return UMA_ET_GESTURE_SCROLL_UPDATE;
     }
     case ui::ET_GESTURE_TAP: {
       const ui::GestureEvent& gesture =
           static_cast<const ui::GestureEvent&>(event);
       int tap_count = gesture.details().tap_count();
       if (tap_count == 1)
         return UMA_ET_GESTURE_TAP;
       else if (tap_count == 2)

[sky, 2013/05/28 21:08:37]

nit: style guide says no else for ifs that return, eg:

if (tab_count == 1)
  return ..
if (tab_count == 2)
  return ..

         return UMA_ET_GESTURE_DOUBLE_TAP;
+      else if (tap_count == 3)
+        return UMA_ET_GESTURE_TRIPLE_TAP;
       NOTREACHED() << "Received tap with tapcount " << tap_count;
       return UMA_ET_UNKNOWN;
     }
     case ui::ET_GESTURE_TAP_DOWN:
       return UMA_ET_GESTURE_TAP_DOWN;
     case ui::ET_GESTURE_BEGIN:
       return UMA_ET_GESTURE_BEGIN;
     case ui::ET_GESTURE_END:
       return UMA_ET_GESTURE_END;
     case ui::ET_GESTURE_TWO_FINGER_TAP:
@@ skipping 221 matching lines @@
     touch_in_progress_ = true;
     last_touch_down_time_ = event.time_stamp();
   } else if (event.type() == ui::ET_TOUCH_RELEASED) {
     if (!aura::Env::GetInstance()->is_touch_down())
       touch_in_progress_ = false;
   }
 }
 
 }  // namespace internal
 }  // namespace ash