Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "TouchCounter.h"
       7             : 
       8             : #include "InputData.h"
       9             : 
      10             : namespace mozilla {
      11             : namespace layers {
      12             : 
      13           2 : TouchCounter::TouchCounter()
      14           2 :   : mActiveTouchCount(0)
      15             : {
      16           2 : }
      17             : 
      18             : void
      19           0 : TouchCounter::Update(const MultiTouchInput& aInput)
      20             : {
      21           0 :   switch (aInput.mType) {
      22             :     case MultiTouchInput::MULTITOUCH_START:
      23             :       // touch-start event contains all active touches of the current session
      24           0 :       mActiveTouchCount = aInput.mTouches.Length();
      25           0 :       break;
      26             :     case MultiTouchInput::MULTITOUCH_END:
      27           0 :       if (mActiveTouchCount >= aInput.mTouches.Length()) {
      28             :         // touch-end event contains only released touches
      29           0 :         mActiveTouchCount -= aInput.mTouches.Length();
      30             :       } else {
      31           0 :         NS_WARNING("Got an unexpected touchend/touchcancel");
      32           0 :         mActiveTouchCount = 0;
      33             :       }
      34           0 :       break;
      35             :     case MultiTouchInput::MULTITOUCH_CANCEL:
      36           0 :       mActiveTouchCount = 0;
      37           0 :       break;
      38             :     case MultiTouchInput::MULTITOUCH_MOVE:
      39           0 :       break;
      40             :   }
      41           0 : }
      42             : 
      43             : uint32_t
      44           0 : TouchCounter::GetActiveTouchCount() const
      45             : {
      46           0 :   return mActiveTouchCount;
      47             : }
      48             : 
      49             : } // namespace layers
      50             : } // namespace mozilla