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10 lines
7.5 KiB
JavaScript
10 lines
7.5 KiB
JavaScript
9 years ago
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/**
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* @preserve FastClick: polyfill to remove click delays on browsers with touch UIs.
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*
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* @version 1.0.0
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* @codingstandard ftlabs-jsv2
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* @copyright The Financial Times Limited [All Rights Reserved]
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* @license MIT License (see LICENSE.txt)
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*/
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function FastClick(a){"use strict";function b(a,b){return function(){return a.apply(b,arguments)}}var c;this.trackingClick=!1,this.trackingClickStart=0,this.targetElement=null,this.touchStartX=0,this.touchStartY=0,this.lastTouchIdentifier=0,this.touchBoundary=10,this.layer=a,FastClick.notNeeded(a)||(deviceIsAndroid&&(a.addEventListener("mouseover",b(this.onMouse,this),!0),a.addEventListener("mousedown",b(this.onMouse,this),!0),a.addEventListener("mouseup",b(this.onMouse,this),!0)),a.addEventListener("click",b(this.onClick,this),!0),a.addEventListener("touchstart",b(this.onTouchStart,this),!1),a.addEventListener("touchmove",b(this.onTouchMove,this),!1),a.addEventListener("touchend",b(this.onTouchEnd,this),!1),a.addEventListener("touchcancel",b(this.onTouchCancel,this),!1),Event.prototype.stopImmediatePropagation||(a.removeEventListener=function(b,c,d){var e=Node.prototype.removeEventListener;"click"===b?e.call(a,b,c.hijacked||c,d):e.call(a,b,c,d)},a.addEventListener=function(b,c,d){var e=Node.prototype.addEventListener;"click"===b?e.call(a,b,c.hijacked||(c.hijacked=function(a){a.propagationStopped||c(a)}),d):e.call(a,b,c,d)}),"function"==typeof a.onclick&&(c=a.onclick,a.addEventListener("click",function(a){c(a)},!1),a.onclick=null))}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);FastClick.prototype.needsClick=function(a){"use strict";switch(a.nodeName.toLowerCase()){case"button":case"select":case"textarea":if(a.disabled)return!0;break;case"input":if(deviceIsIOS&&"file"===a.type||a.disabled)return!0;break;case"label":case"video":return!0}return/\bneedsclick\b/.test(a.className)},FastClick.prototype.needsFocus=function(a){"use strict";switch(a.nodeName.toLowerCase()){case"textarea":return!0;case"select":return!deviceIsAndroid;case"input":switch(a.type){case"button":case"checkbox":case"file":case"image":case"radio":case"submit":return!1}return!a.disabled&&!a.readOnly;default:return/\bneedsfocus\b/.test(a.className)}},FastClick.prototype.sendClick=function(a,b){"use strict";var c,d;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)},FastClick.prototype.determineEventType=function(a){"use strict";return deviceIsAndroid&&"select"===a.tagName.toLowerCase()?"mousedown":"click"},FastClick.prototype.focus=function(a){"use strict";var b;deviceIsIOS&&a.setSelectionRange&&0!==a.type.indexOf("date")&&"time"!==a.type?(b=a.value.length,a.setSelectionRange(b,b)):a.focus()},FastClick.prototype.updateScrollParent=function(a){"use strict";var b,c;if(b=a.fastClickScrollParent,!b||!b.contains(a)){c=a;do{if(c.scrollHeight>c.offsetHeight){b=c,a.fastClickScrollParent=c;break}c=c.parentElement}while(c)}b&&(b.fastClickLastScrollTop=b.scrollTop)},FastClick.prototype.getTargetElementFromEventTarget=function(a){"use strict";return a.nodeType===Node.TEXT_NODE?a.parentNode:a},FastClick.prototype.onTouchStart=function(a){"use strict";var b,c,d;if(a.targetTouches.length>1)return!0;if(b=this.getTargetElementFromEventTarget(a.target),c=a.targetTouches[0],deviceIsIOS){if(d=window.getSelection(),d.rangeCount&&!d.isCollapsed)return!0;if(!deviceIsIOS4){if(c.identifier===this.lastTouchIdentifier)return a.preventDefault(),!1;this.lastTouchIdentifier=c.identifier,this.updateScrollParent(b)}}return this.trackingClick=!0,this.trackingClickStart=a.timeStamp,this.targetElement=b,this.touchStartX=c.pageX,this.touchStartY=c.pageY,a.timeStamp-this.lastClickTime<200&&a.preventDefault(),!0},FastClick.prototype.touchHasMoved=function(a){"use strict";var b=a.changedTouches[0],c=this.touchBoundary;return Math.abs(b.pageX-this.touchStartX)>c||Math.abs(b.pageY-this.touchStartY)>c?!0:!1},FastClick.prototype.on
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