vue2-gesture.js

/**
 * MIT License

 Copyright (c) 2017 Allan Karlson

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */


/**
 * MIT License

 Copyright (c) 2016 biubiubiu

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
**/

// tap — fires when the element is tapped.
// doubleTap — this pair of events can be used to detect both single and double taps on the same element (if you don’t need double tap detection, use tap instead).
// longTap — fires when an element is tapped and the finger is held down for more than 750ms.
// swipe, swipeLeft, swipeRight, swipeUp, swipeDown — fires when an element is swiped (optionally in the given direction)
// touchstart touchmove touchend - These equivalent to touch the primary event

;(function(){
  if(vueGesture && vueGesture.config && vueGesture.config.id === "vue2-Gesture@bees4ever.de") return;
  var vueGesture = {};
  vueGesture.gloabal = {
    id: "vue2-Gesture@bees4ever.de",
    domUuid : 1,
    InternalKeyName : "vue2GestureInternalKey"
  }
  vueGesture.domCaches = {};
  vueGesture.util={
        getType:function(o){   
          var _t;
          return ((_t = typeof(o)) == "object" ? o==null && "null" || Object.prototype.toString.call(o).slice(8,-1):_t).toLowerCase();
        },
        deepClone:function(source){    
          var self=this;   
          var destination=self.getType(source);
          destination=destination==='array'?[]:(destination==='object'?{}:source);
          for (var p in source) {
              if (self.getType(source[p]) === "array" || self.getType(source[p]) === "object") {
                  destination[p] = self.getType(source[p]) === "array" ? [] : {};
                  destination[p]=arguments.callee.call(self, source[p]);    
              } else {
                  destination[p] = source[p];
              }
          }
          return destination;
        },
        isFunction: function(f){
          return (f && Object.prototype.toString.call(f)==="[object Function]") ? true : false;
        }
    };
  vueGesture.config = {
    maxSingleTapTimeInterval : 300, // ms
    maxSingleTapPageDistanceSquared : 25, // within 5px we consider it as a single tap
    minLongtapTimeInterval : 700,
    maxDoubleTapTimeInterval: 300,
    maxDoubleTapPageDistanceSquared: 64, //8px
    gestureEventsToClick:['tap', 'longtap', 'touchstart']
  };

  vueGesture.Statics = {
    initEvents : function(self){
      var _self = this;
      var b = vueGesture.Statics.isInDomCaches(self);
      if(b) return;
      var domCache = vueGesture.Statics.getDomCache(self);

      domCache.listenTouchEvents.touchstart = function(e) {
        if (_self.isPC()) {return}
        if(_self.isPrimaryTouch(e)) return;
        _self.touchstartHandler(self, e);
      }
      domCache.listenTouchEvents.touchmove = function(e) {
        if (_self.isPC()) {return}
        if(_self.isPrimaryTouch(e)) return;
        _self.touchmoveHandler(self, e);
      }
      domCache.listenTouchEvents.touchend = function(e) {
        if(e.type != "touchend") return;
        if (_self.isPC()) {return}
        if(_self.isPrimaryTouch(e)) return;
        _self.touchendHandler(self, e);
      }
      domCache.listenTouchEvents.click = function(e){
        //todo
        // if(_self.isPrimaryTouch(e)) return;
        _self.clickHandler(self, e);
      }
      self.addEventListener('touchstart',domCache.listenTouchEvents.touchstart,false);
      self.addEventListener('touchmove',domCache.listenTouchEvents.touchmove,false);
      self.addEventListener('touchend',domCache.listenTouchEvents.touchend,false);
      self.addEventListener('click',domCache.listenTouchEvents.click,false);
    },
    invokeHandler : function(e, o, touch, gestureName){

      var _self = this;
      if (vueGesture.judgements[gestureName](touch)) {
        _self.executeFn(e, o);
      }
    },
    clickHandler: function(self , e){
      var _self = this;
      var domCache = vueGesture.Statics.getDomCache(self);
      var touch = domCache.touch;
      var o = domCache.gestureEvents['click'];
      if (o) {
        _self.executeFn(e ,o);
      }
      if (_self.isPC()) {
        vueGesture.config.gestureEventsToClick.forEach(function(elem){
          var _o = domCache.gestureEvents[elem];
          if (_o){
            _self.executeFn(e ,_o);
          }
        });
      }
    },
    touchstartHandler : function(self, e) {

      var _self = this;
      var domCache = vueGesture.Statics.getDomCache(self);
      var touch = domCache.touch;
      var o = domCache.gestureEvents['touchstart'];
      if (o) {
        _self.executeFn(e, o);
      }
      touch.touchstartTime = e.timeStamp;
      touch.touchstartCoord.pageX = e.touches[0].pageX;
      touch.touchstartCoord.pageY = e.touches[0].pageY;
    },
    touchmoveHandler : function(self ,e){
      var _self = this;
      var domCache = vueGesture.Statics.getDomCache(self);
      var touch = domCache.touch;
      var o = domCache.gestureEvents['touchmove'];
      if (o) {
        _self.executeFn(e , o);
      }
    },
    touchendHandler : function(self, e) {
      var _self = this;
      var domCache = vueGesture.Statics.getDomCache(self);
      var touch = domCache.touch;
      touch.touchendTime = e.timeStamp;
      touch.touchendCoord.pageX = e.changedTouches[0].pageX;
      touch.touchendCoord.pageY = e.changedTouches[0].pageY;
      //is match condition;
      for (var o in domCache.gestureEvents){
        _self.invokeHandler(e, domCache.gestureEvents[o], touch, o);
      }
      touch.lastTouchstartTime = touch.touchstartTime;
      touch.lastTouchendTime = touch.touchendTime;
      touch.lastTouchstartCoord = vueGesture.util.deepClone(touch.touchstartCoord);
      touch.lastTouchendCoord = vueGesture.util.deepClone(touch.touchendCoord);
    },
    getDomCache : function(self) {
        return vueGesture.domCaches[self[vueGesture.gloabal.InternalKeyName]] ||
          (vueGesture.domCaches[self[vueGesture.gloabal.InternalKeyName] = vueGesture.gloabal.domUuid++] = this.initDomCache());
    },
    isInDomCaches : function(self){

      return vueGesture.domCaches[self[vueGesture.gloabal.InternalKeyName]] ? true : false;
    },
    unbindDirective : function(self) {
      var domCache = vueGesture.Statics.getDomCache(self);
      vueGesture.Statics.removeDirectiveEventListeners(self, domCache);
      //todo Memory recovery
      vueGesture.domCaches[self.el[vueGesture.gloabal.InternalKeyName]] = null;
      delete vueGesture.domCaches[self.el[vueGesture.gloabal.InternalKeyName]];
    },
    initDomCache : function(){
      return {
        touch : {
          touchstartTime : 0,
          touchendTime : 0,
          touchstartCoord : {},
          touchendCoord : {},

          lastTouchendTime : 0,
          lastTouchstartTime: 0,
          lastTouchstartCoord : {},
          lastTouchendCoord: {},

          get timeInterval () {
            return this.touchendTime - this.touchstartTime;
          },
          get pageXDistance () {
            return this.touchendCoord.pageX - this.touchstartCoord.pageX;
          },
          get pageYDistance () {
            return this.touchendCoord.pageY - this.touchstartCoord.pageY;
          },
          get lastTimeInterval () {
            return this.lastTouchendTime - this.lastTouchstartTime;
          },
          get lastPageXDistance () {
            return this.touchendCoord.pageX - this.touchstartCoord.pageX;
          },
          get lastPageYDistance () {
            return this.touchendCoord.pageY - this.touchstartCoord.pageY;
          },
          get deltaTime () {
            return this.touchendTime - this.lastTouchstartTime;
          }
        },
        gestureEvents: {},
        listenTouchEvents: {}
      }
    },
    getEventNameByArg : function(arg){
      var str = (0 === arg.indexOf(':') ? arg.substr(1):arg);
      str = str.toLowerCase();
      if (typeof vueGesture.judgements[str] != "function") {
        return false;
      }
      return str;
    },
    isPrimaryTouch : function(event){
      // ensure swiping with one touch and not pinching
      return (event.touches.length > 1 || event.scale && event.scale !== 1);
    },
    isPC :function() {
      var uaInfo = navigator.userAgent;
      var agents = ["Android", "iPhone", "Windows Phone", "iPad", "iPod"];
      var flag = true;
      for (var i = 0; i < agents.length; i++) {
         if (uaInfo.indexOf(agents[i]) > 0) { flag = false; break; }
      }
      return flag;
    },
    removeDirectiveEventListeners : function(self, domCache){
      self.removeEventListener('touchstart', domCache.listenTouchEvents.touchstart);
      self.removeEventListener('touchmove', domCache.listenTouchEvents.touchmove);
      self.removeEventListener('touchend', domCache.listenTouchEvents.touchend);
      self.removeEventListener('click', domCache.listenTouchEvents.click);
    },
    executeFn: function(e ,o){
      o.fn(e);
       if(typeof o.modifiers != "undefined")
       {
         if(o.modifiers.stop)
             e.stopPropagation();
         if(o.modifiers.prevent)
             e.preventDefault();
       }

    }
  };



  vueGesture.judgements = {
    'tap': function(touch){
      return (touch.timeInterval < vueGesture.config.maxSingleTapTimeInterval) && (touch.pageXDistance * touch.pageXDistance + touch.pageYDistance * touch.pageYDistance) < vueGesture.config.maxSingleTapPageDistanceSquared;
    },
    'longtap': function(touch){
      return (touch.timeInterval > vueGesture.config.minLongtapTimeInterval) && (touch.pageXDistance * touch.pageXDistance + touch.pageYDistance * touch.pageYDistance) < vueGesture.config.maxSingleTapPageDistanceSquared;
    },
    'doubletap': function(touch){
      return touch.deltaTime < vueGesture.config.maxDoubleTapTimeInterval &&
        (touch.lastPageXDistance * touch.lastPageXDistance + touch.lastPageYDistance * touch.lastPageYDistance) < vueGesture.config.maxDoubleTapPageDistanceSquared &&
        (touch.timeInterval < vueGesture.config.maxSingleTapTimeInterval) && (touch.pageXDistance * touch.pageXDistance + touch.pageYDistance * touch.pageYDistance) < vueGesture.config.maxSingleTapPageDistanceSquared &&
        (touch.lastTimeInterval < vueGesture.config.maxSingleTapTimeInterval) && (touch.lastPageXDistance * touch.lastPageXDistance + touch.lastPageYDistance * touch.lastPageYDistance) < vueGesture.config.maxSingleTapPageDistanceSquared;
    },
    'swipe': function(touch){
      return (touch.pageXDistance * touch.pageXDistance + touch.pageYDistance * touch.pageYDistance) > vueGesture.config.maxSingleTapPageDistanceSquared;
    },
    'swipeleft': function(touch){
      if(!this['swipe'](touch)) return false;
      return touch.pageXDistance < 0 && Math.abs(touch.pageXDistance) > Math.abs(touch.pageYDistance);
    },
    'swiperight': function(touch){
      if(!this['swipe'](touch)) return false;
      return touch.pageXDistance > 0 && Math.abs(touch.pageXDistance) > Math.abs(touch.pageYDistance);
    },
    'swipeup': function(touch){
      if(!this['swipe'](touch)) return false;
      return touch.pageYDistance < 0 && Math.abs(touch.pageYDistance) > Math.abs(touch.pageXDistance);
    },
    'swipedown': function(touch){
      if(!this['swipe'](touch)) return false;
      return touch.pageYDistance > 0 && Math.abs(touch.pageYDistance) > Math.abs(touch.pageXDistance);
    },
    //not calculate
    'touchstart': function(){return false},
    'touchmove': function(){return false},
    'touchend': function(){return true},
    'click': function(){return false;}
  };


    Vue.component('vue2-gesture', {
        template: '<span><slot></slot></span>',
        props: {
            type: {type: String, default: function () { return null }},
            call: {type: Function },
            types: {type: Array, default : function (){return []}}

        },
        mounted: function () {
            var self = this;
            vueGesture.Statics.initEvents(this.$el);
            if(typeof this.call !== 'function') {
              console.log(this.call);
                return console.error('The expression of directive "v-gesture" must be a function!');
            }

            var all_types = [];

            if(this.type != null)
            {
                all_types.push(this.type);
            }



            for(var i in this.types)
            {
                all_types.push(this.types[i])
            }

            for(var i in all_types)
            {

              var eventName = vueGesture.Statics.getEventNameByArg(all_types[i]);
              var domCache = vueGesture.Statics.getDomCache(this.$el);
              if(!eventName) {
                  console.error("self.arg not correct argument;");
                  return;
              }
              domCache.gestureEvents[eventName] = {};
              domCache.gestureEvents[eventName].fn = this.call;
            }

        },
        data: function () {
            return {};
        }
    });

})()