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-rwxr-xr-xjs/core/touch.js175
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diff --git a/js/core/touch.js b/js/core/touch.js
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1/*! UIkit 2.26.4 | http://www.getuikit.com | (c) 2014 YOOtheme | MIT License */
2// Based on Zeptos touch.js
3// https://raw.github.com/madrobby/zepto/master/src/touch.js
4// Zepto.js may be freely distributed under the MIT license.
5
6;(function($){
7
8 if ($.fn.swipeLeft) {
9 return;
10 }
11
12
13 var touch = {}, touchTimeout, tapTimeout, swipeTimeout, longTapTimeout, longTapDelay = 750, gesture;
14
15 function swipeDirection(x1, x2, y1, y2) {
16 return Math.abs(x1 - x2) >= Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down');
17 }
18
19 function longTap() {
20 longTapTimeout = null;
21 if (touch.last) {
22 if ( touch.el !== undefined ) touch.el.trigger('longTap');
23 touch = {};
24 }
25 }
26
27 function cancelLongTap() {
28 if (longTapTimeout) clearTimeout(longTapTimeout);
29 longTapTimeout = null;
30 }
31
32 function cancelAll() {
33 if (touchTimeout) clearTimeout(touchTimeout);
34 if (tapTimeout) clearTimeout(tapTimeout);
35 if (swipeTimeout) clearTimeout(swipeTimeout);
36 if (longTapTimeout) clearTimeout(longTapTimeout);
37 touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null;
38 touch = {};
39 }
40
41 function isPrimaryTouch(event){
42 return event.pointerType == event.MSPOINTER_TYPE_TOUCH && event.isPrimary;
43 }
44
45 $(function(){
46 var now, delta, deltaX = 0, deltaY = 0, firstTouch;
47
48 if ('MSGesture' in window) {
49 gesture = new MSGesture();
50 gesture.target = document.body;
51 }
52
53 $(document)
54 .on('MSGestureEnd gestureend', function(e){
55
56 var swipeDirectionFromVelocity = e.originalEvent.velocityX > 1 ? 'Right' : e.originalEvent.velocityX < -1 ? 'Left' : e.originalEvent.velocityY > 1 ? 'Down' : e.originalEvent.velocityY < -1 ? 'Up' : null;
57
58 if (swipeDirectionFromVelocity && touch.el !== undefined) {
59 touch.el.trigger('swipe');
60 touch.el.trigger('swipe'+ swipeDirectionFromVelocity);
61 }
62 })
63 // MSPointerDown: for IE10
64 // pointerdown: for IE11
65 .on('touchstart MSPointerDown pointerdown', function(e){
66
67 if(e.type == 'MSPointerDown' && !isPrimaryTouch(e.originalEvent)) return;
68
69 firstTouch = (e.type == 'MSPointerDown' || e.type == 'pointerdown') ? e : e.originalEvent.touches[0];
70
71 now = Date.now();
72 delta = now - (touch.last || now);
73 touch.el = $('tagName' in firstTouch.target ? firstTouch.target : firstTouch.target.parentNode);
74
75 if(touchTimeout) clearTimeout(touchTimeout);
76
77 touch.x1 = firstTouch.pageX;
78 touch.y1 = firstTouch.pageY;
79
80 if (delta > 0 && delta <= 250) touch.isDoubleTap = true;
81
82 touch.last = now;
83 longTapTimeout = setTimeout(longTap, longTapDelay);
84
85 // adds the current touch contact for IE gesture recognition
86 if (gesture && ( e.type == 'MSPointerDown' || e.type == 'pointerdown' || e.type == 'touchstart' ) ) {
87 gesture.addPointer(e.originalEvent.pointerId);
88 }
89
90 })
91 // MSPointerMove: for IE10
92 // pointermove: for IE11
93 .on('touchmove MSPointerMove pointermove', function(e){
94
95 if (e.type == 'MSPointerMove' && !isPrimaryTouch(e.originalEvent)) return;
96
97 firstTouch = (e.type == 'MSPointerMove' || e.type == 'pointermove') ? e : e.originalEvent.touches[0];
98
99 cancelLongTap();
100 touch.x2 = firstTouch.pageX;
101 touch.y2 = firstTouch.pageY;
102
103 deltaX += Math.abs(touch.x1 - touch.x2);
104 deltaY += Math.abs(touch.y1 - touch.y2);
105 })
106 // MSPointerUp: for IE10
107 // pointerup: for IE11
108 .on('touchend MSPointerUp pointerup', function(e){
109
110 if (e.type == 'MSPointerUp' && !isPrimaryTouch(e.originalEvent)) return;
111
112 cancelLongTap();
113
114 // swipe
115 if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) || (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30)){
116
117 swipeTimeout = setTimeout(function() {
118 if ( touch.el !== undefined ) {
119 touch.el.trigger('swipe');
120 touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2)));
121 }
122 touch = {};
123 }, 0);
124
125 // normal tap
126 } else if ('last' in touch) {
127
128 // don't fire tap when delta position changed by more than 30 pixels,
129 // for instance when moving to a point and back to origin
130 if (isNaN(deltaX) || (deltaX < 30 && deltaY < 30)) {
131 // delay by one tick so we can cancel the 'tap' event if 'scroll' fires
132 // ('tap' fires before 'scroll')
133 tapTimeout = setTimeout(function() {
134
135 // trigger universal 'tap' with the option to cancelTouch()
136 // (cancelTouch cancels processing of single vs double taps for faster 'tap' response)
137 var event = $.Event('tap');
138 event.cancelTouch = cancelAll;
139 if ( touch.el !== undefined ) touch.el.trigger(event);
140
141 // trigger double tap immediately
142 if (touch.isDoubleTap) {
143 if ( touch.el !== undefined ) touch.el.trigger('doubleTap');
144 touch = {};
145 }
146
147 // trigger single tap after 250ms of inactivity
148 else {
149 touchTimeout = setTimeout(function(){
150 touchTimeout = null;
151 if ( touch.el !== undefined ) touch.el.trigger('singleTap');
152 touch = {};
153 }, 250);
154 }
155 }, 0);
156 } else {
157 touch = {};
158 }
159 deltaX = deltaY = 0;
160 }
161 })
162 // when the browser window loses focus,
163 // for example when a modal dialog is shown,
164 // cancel all ongoing events
165 .on('touchcancel MSPointerCancel', cancelAll);
166
167 // scrolling the window indicates intention of the user
168 // to scroll, not tap or swipe, so cancel all ongoing events
169 $(window).on('scroll', cancelAll);
170 });
171
172 ['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown', 'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){
173 $.fn[eventName] = function(callback){ return $(this).on(eventName, callback); };
174 });
175})(jQuery);
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