js/vendor/fastclick.js

   1 /**
   2  * @preserve FastClick: polyfill to remove click delays on browsers with touch UIs.
   3  *
   4  * @version 1.0.3
   5  * @codingstandard ftlabs-jsv2
   6  * @copyright The Financial Times Limited [All Rights Reserved]
   7  * @license MIT License (see LICENSE.txt)
   8  */
   9 function FastClick(a, b) {
  10     "use strict";
  11     function c(a, b) {
  12         return function () {
  13             return a.apply(b, arguments)
  14         }
  15     }
  16
  17     var d;
  18     if (b = b || {}, this.trackingClick = !1, this.trackingClickStart = 0, this.targetElement = null, this.touchStartX = 0, this.touchStartY = 0, this.lastTouchIdentifier = 0, this.touchBoundary = b.touchBoundary || 10, this.layer = a, this.tapDelay = b.tapDelay || 200, !FastClick.notNeeded(a)) {
  19         for (var e = ["onMouse", "onClick", "onTouchStart", "onTouchMove", "onTouchEnd", "onTouchCancel"], f = this, g = 0, h = e.length; h > g; g++)f[e[g]] = c(f[e[g]], f);
  20         deviceIsAndroid && (a.addEventListener("mouseover", this.onMouse, !0), a.addEventListener("mousedown", this.onMouse, !0), a.addEventListener("mouseup", this.onMouse, !0)), a.addEventListener("click", this.onClick, !0), a.addEventListener("touchstart", this.onTouchStart, !1), a.addEventListener("touchmove", this.onTouchMove, !1), a.addEventListener("touchend", this.onTouchEnd, !1), a.addEventListener("touchcancel", this.onTouchCancel, !1), Event.prototype.stopImmediatePropagation || (a.removeEventListener = function (b, c, d) {
  21             var e = Node.prototype.removeEventListener;
  22             "click" === b ? e.call(a, b, c.hijacked || c, d) : e.call(a, b, c, d)
  23         }, a.addEventListener = function (b, c, d) {
  24             var e = Node.prototype.addEventListener;
  25             "click" === b ? e.call(a, b, c.hijacked || (c.hijacked = function (a) {
  26                 a.propagationStopped || c(a)
  27             }), d) : e.call(a, b, c, d)
  28         }), "function" == typeof a.onclick && (d = a.onclick, a.addEventListener("click", function (a) {
  29             d(a)
  30         }, !1), a.onclick = null)
  31     }
  32 }
  33 var deviceIsAndroid = navigator.userAgent.indexOf("Android") > 0, deviceIsIOS = /iP(ad|hone|od)/.test(navigator.userAgent), deviceIsIOS4 = deviceIsIOS && /OS 4_\d(_\d)?/.test(navigator.userAgent), deviceIsIOSWithBadTarget = deviceIsIOS && /OS ([6-9]|\d{2})_\d/.test(navigator.userAgent), deviceIsBlackBerry10 = navigator.userAgent.indexOf("BB10") > 0;
  34 FastClick.prototype.needsClick = function (a) {
  35     "use strict";
  36     switch (a.nodeName.toLowerCase()) {
  37         case"button":
  38         case"select":
  39         case"textarea":
  40             if (a.disabled)return !0;
  41             break;
  42         case"input":
  43             if (deviceIsIOS && "file" === a.type || a.disabled)return !0;
  44             break;
  45         case"label":
  46         case"video":
  47             return !0
  48     }
  49     return /\bneedsclick\b/.test(a.className)
  50 }, FastClick.prototype.needsFocus = function (a) {
  51     "use strict";
  52     switch (a.nodeName.toLowerCase()) {
  53         case"textarea":
  54             return !0;
  55         case"select":
  56             return !deviceIsAndroid;
  57         case"input":
  58             switch (a.type) {
  59                 case"button":
  60                 case"checkbox":
  61                 case"file":
  62                 case"image":
  63                 case"radio":
  64                 case"submit":
  65                     return !1
  66             }
  67             return !a.disabled && !a.readOnly;
  68         default:
  69             return /\bneedsfocus\b/.test(a.className)
  70     }
  71 }, FastClick.prototype.sendClick = function (a, b) {
  72     "use strict";
  73     var c, d;
  74     document.activeElement && document.activeElement !== a && document.activeElement.blur(), d = b.changedTouches[0], c = document.createEvent("MouseEvents"), c.initMouseEvent(this.determineEventType(a), !0, !0, window, 1, d.screenX, d.screenY, d.clientX, d.clientY, !1, !1, !1, !1, 0, null), c.forwardedTouchEvent = !0, a.dispatchEvent(c)
  75 }, FastClick.prototype.determineEventType = function (a) {
  76     "use strict";
  77     return deviceIsAndroid && "select" === a.tagName.toLowerCase() ? "mousedown" : "click"
  78 }, FastClick.prototype.focus = function (a) {
  79     "use strict";
  80     var b;
  81     deviceIsIOS && a.setSelectionRange && 0 !== a.type.indexOf("date") && "time" !== a.type ? (b = a.value.length, a.setSelectionRange(b, b)) : a.focus()
  82 }, FastClick.prototype.updateScrollParent = function (a) {
  83     "use strict";
  84     var b, c;
  85     if (b = a.fastClickScrollParent, !b || !b.contains(a)) {
  86         c = a;
  87         do {
  88             if (c.scrollHeight > c.offsetHeight) {
  89                 b = c, a.fastClickScrollParent = c;
  90                 break
  91             }
  92             c = c.parentElement
  93         } while (c)
  94     }
  95     b && (b.fastClickLastScrollTop = b.scrollTop)
  96 }, FastClick.prototype.getTargetElementFromEventTarget = function (a) {
  97     "use strict";
  98     return a.nodeType === Node.TEXT_NODE ? a.parentNode : a
  99 }, FastClick.prototype.onTouchStart = function (a) {
 100     "use strict";
 101     var b, c, d;
 102     if (a.targetTouches.length > 1)return !0;
 103     if (b = this.getTargetElementFromEventTarget(a.target), c = a.targetTouches[0], deviceIsIOS) {
 104         if (d = window.getSelection(), d.rangeCount && !d.isCollapsed)return !0;
 105         if (!deviceIsIOS4) {
 106             if (c.identifier && c.identifier === this.lastTouchIdentifier)return a.preventDefault(), !1;
 107             this.lastTouchIdentifier = c.identifier, this.updateScrollParent(b)
 108         }
 109     }
 110     return this.trackingClick = !0, this.trackingClickStart = a.timeStamp, this.targetElement = b, this.touchStartX = c.pageX, this.touchStartY = c.pageY, a.timeStamp - this.lastClickTime < this.tapDelay && a.preventDefault(), !0
 111 }, FastClick.prototype.touchHasMoved = function (a) {
 112     "use strict";
 113     var b = a.changedTouches[0], c = this.touchBoundary;
 114     return Math.abs(b.pageX - this.touchStartX) > c || Math.abs(b.pageY - this.touchStartY) > c ? !0 : !1
 115 }, FastClick.prototype.onTouchMove = function (a) {
 116     "use strict";
 117     return this.trackingClick ? ((this.targetElement !== this.getTargetElementFromEventTarget(a.target) || this.touchHasMoved(a)) && (this.trackingClick = !1, this.targetElement = null), !0) : !0
 118 }, FastClick.prototype.findControl = function (a) {
 119     "use strict";
 120     return void 0 !== a.control ? a.control : a.htmlFor ? document.getElementById(a.htmlFor) : a.querySelector("button, input:not([type=hidden]), keygen, meter, output, progress, select, textarea")
 121 }, FastClick.prototype.onTouchEnd = function (a) {
 122     "use strict";
 123     var b, c, d, e, f, g = this.targetElement;
 124     if (!this.trackingClick)return !0;
 125     if (a.timeStamp - this.lastClickTime < this.tapDelay)return this.cancelNextClick = !0, !0;
 126     if (this.cancelNextClick = !1, this.lastClickTime = a.timeStamp, c = this.trackingClickStart, this.trackingClick = !1, this.trackingClickStart = 0, deviceIsIOSWithBadTarget && (f = a.changedTouches[0], g = document.elementFromPoint(f.pageX - window.pageXOffset, f.pageY - window.pageYOffset) || g, g.fastClickScrollParent = this.targetElement.fastClickScrollParent), d = g.tagName.toLowerCase(), "label" === d) {
 127         if (b = this.findControl(g)) {
 128             if (this.focus(g), deviceIsAndroid)return !1;
 129             g = b
 130         }
 131     } else if (this.needsFocus(g))return a.timeStamp - c > 100 || deviceIsIOS && window.top !== window && "input" === d ? (this.targetElement = null, !1) : (this.focus(g), this.sendClick(g, a), deviceIsIOS && "select" === d || (this.targetElement = null, a.preventDefault()), !1);
 132     return deviceIsIOS && !deviceIsIOS4 && (e = g.fastClickScrollParent, e && e.fastClickLastScrollTop !== e.scrollTop) ? !0 : (this.needsClick(g) || (a.preventDefault(), this.sendClick(g, a)), !1)
 133 }, FastClick.prototype.onTouchCancel = function () {
 134     "use strict";
 135     this.trackingClick = !1, this.targetElement = null
 136 }, FastClick.prototype.onMouse = function (a) {
 137     "use strict";
 138     return this.targetElement ? a.forwardedTouchEvent ? !0 : a.cancelable && (!this.needsClick(this.targetElement) || this.cancelNextClick) ? (a.stopImmediatePropagation ? a.stopImmediatePropagation() : a.propagationStopped = !0, a.stopPropagation(), a.preventDefault(), !1) : !0 : !0
 139 }, FastClick.prototype.onClick = function (a) {
 140     "use strict";
 141     var b;
 142     return this.trackingClick ? (this.targetElement = null, this.trackingClick = !1, !0) : "submit" === a.target.type && 0 === a.detail ? !0 : (b = this.onMouse(a), b || (this.targetElement = null), b)
 143 }, FastClick.prototype.destroy = function () {
 144     "use strict";
 145     var a = this.layer;
 146     deviceIsAndroid && (a.removeEventListener("mouseover", this.onMouse, !0), a.removeEventListener("mousedown", this.onMouse, !0), a.removeEventListener("mouseup", this.onMouse, !0)), a.removeEventListener("click", this.onClick, !0), a.removeEventListener("touchstart", this.onTouchStart, !1), a.removeEventListener("touchmove", this.onTouchMove, !1), a.removeEventListener("touchend", this.onTouchEnd, !1), a.removeEventListener("touchcancel", this.onTouchCancel, !1)
 147 }, FastClick.notNeeded = function (a) {
 148     "use strict";
 149     var b, c, d;
 150     if ("undefined" == typeof window.ontouchstart)return !0;
 151     if (c = +(/Chrome\/([0-9]+)/.exec(navigator.userAgent) || [, 0])[1]) {
 152         if (!deviceIsAndroid)return !0;
 153         if (b = document.querySelector("meta[name=viewport]")) {
 154             if (-1 !== b.content.indexOf("user-scalable=no"))return !0;
 155             if (c > 31 && document.documentElement.scrollWidth <= window.outerWidth)return !0
 156         }
 157     }
 158     if (deviceIsBlackBerry10 && (d = navigator.userAgent.match(/Version\/([0-9]*)\.([0-9]*)/), d[1] >= 10 && d[2] >= 3 && (b = document.querySelector("meta[name=viewport]")))) {
 159         if (-1 !== b.content.indexOf("user-scalable=no"))return !0;
 160         if (document.documentElement.scrollWidth <= window.outerWidth)return !0
 161     }
 162     return "none" === a.style.msTouchAction ? !0 : !1
 163 }, FastClick.attach = function (a, b) {
 164     "use strict";
 165     return new FastClick(a, b)
 166 }, "function" == typeof define && "object" == typeof define.amd && define.amd ? define(function () {
 167     "use strict";
 168     return FastClick
 169 }) : "undefined" != typeof module && module.exports ? (module.exports = FastClick.attach, module.exports.FastClick = FastClick) : window.FastClick = FastClick;