Fix wechat touch end/cancel not fired issue

Author: pandamicro

CCBoot.js

@@ -2020,6 +2020,21 @@ var _initSys = function () {
     sys.openURL = function(url){
         window.open(url);
     };
+
+    /**
+     * Get the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
+     * @memberof cc.sys
+     * @name now
+     * @return {Number}
+     */
+    sys.now = function () {
+        if (Date.now) {
+            return Date.now();
+        }
+        else {
+            return +(new Date);
+        }
+    };
 };
 _initSys();
 

cocos2d/core/event-manager/CCTouch.js

@@ -33,6 +33,7 @@
  * @param {Number} id
  */
 cc.Touch = cc.Class.extend(/** @lends cc.Touch# */{
+    _lastModified: 0,
     _point:null,
     _prevPoint:null,
     _id:0,

cocos2d/core/platform/CCInputManager.js

@@ -56,6 +56,8 @@ cc.UIInterfaceOrientationPortrait = 0;
  * @name cc.inputManager
  */
 cc.inputManager = /** @lends cc.inputManager# */{
+    TOUCH_TIMEOUT: 5000,
+
     _mousePressed: false,
 
     _isRegisterEvent: false,
@@ -81,12 +83,21 @@ cc.inputManager = /** @lends cc.inputManager# */{
 
     _getUnUsedIndex: function () {
         var temp = this._indexBitsUsed;
+        var now = cc.sys.now();
 
         for (var i = 0; i < this._maxTouches; i++) {
             if (!(temp & 0x00000001)) {
                 this._indexBitsUsed |= (1 << i);
                 return i;
             }
+            else {
+                var touch = this._touches[i];
+                if (now - touch._lastModified > this.TOUCH_TIMEOUT) {
+                    this._removeUsedIndexBit(i);
+                    delete this._touchesIntegerDict[touch.getID()];
+                    return i;
+                }
+            }
             temp >>= 1;
         }
 
@@ -110,7 +121,9 @@ cc.inputManager = /** @lends cc.inputManager# */{
      * @param {Array} touches
      */
     handleTouchesBegin: function (touches) {
-        var selTouch, index, curTouch, touchID, handleTouches = [], locTouchIntDict = this._touchesIntegerDict;
+        var selTouch, index, curTouch, touchID, 
+            handleTouches = [], locTouchIntDict = this._touchesIntegerDict,
+            now = cc.sys.now();
         for(var i = 0, len = touches.length; i< len; i ++){
             selTouch = touches[i];
             touchID = selTouch.getID();
@@ -124,6 +137,7 @@ cc.inputManager = /** @lends cc.inputManager# */{
                 }
                 //curTouch = this._touches[unusedIndex] = selTouch;
                 curTouch = this._touches[unusedIndex] = new cc.Touch(selTouch._point.x, selTouch._point.y, selTouch.getID());
+                curTouch._lastModified = now;
                 curTouch._setPrevPoint(selTouch._prevPoint);
                 locTouchIntDict[touchID] = unusedIndex;
                 handleTouches.push(curTouch);
@@ -142,7 +156,9 @@ cc.inputManager = /** @lends cc.inputManager# */{
      * @param {Array} touches
      */
     handleTouchesMove: function(touches){
-        var selTouch, index, touchID, handleTouches = [], locTouches = this._touches;
+        var selTouch, index, touchID, 
+            handleTouches = [], locTouches = this._touches,
+            now = cc.sys.now();
         for(var i = 0, len = touches.length; i< len; i ++){
             selTouch = touches[i];
             touchID = selTouch.getID();
@@ -155,6 +171,7 @@ cc.inputManager = /** @lends cc.inputManager# */{
             if(locTouches[index]){
                 locTouches[index]._setPoint(selTouch._point);
                 locTouches[index]._setPrevPoint(selTouch._prevPoint);
+                locTouches[index]._lastModified = now;
                 handleTouches.push(locTouches[index]);
             }
         }