nn/fastclick.js

function FastClick(t,e){"use strict";function i(t,e){return function(){return t.apply(e,arguments)}}var n;if(e=e||{},this.trackingClick=!1,this.trackingClickStart=0,this.targetElement=null,this.touchStartX=0,this.touchStartY=0,this.lastTouchIdentifier=0,this.touchBoundary=e.touchBoundary||10,this.layer=t,this.tapDelay=e.tapDelay||200,!FastClick.notNeeded(t)){for(var o=["onMouse","onClick","onTouchStart","onTouchMove","onTouchEnd","onTouchCancel"],r=this,s=0,c=o.length;c>s;s++)r[o[s]]=i(r[o[s]],r);deviceIsAndroid&&(t.addEventListener("mouseover",this.onMouse,!0),t.addEventListener("mousedown",this.onMouse,!0),t.addEventListener("mouseup",this.onMouse,!0)),t.addEventListener("click",this.onClick,!0),t.addEventListener("touchstart",this.onTouchStart,!1),t.addEventListener("touchmove",this.onTouchMove,!1),t.addEventListener("touchend",this.onTouchEnd,!1),t.addEventListener("touchcancel",this.onTouchCancel,!1),Event.prototype.stopImmediatePropagation||(t.removeEventListener=function(e,i,n){var o=Node.prototype.removeEventListener;"click"===e?o.call(t,e,i.hijacked||i,n):o.call(t,e,i,n)},t.addEventListener=function(e,i,n){var o=Node.prototype.addEventListener;"click"===e?o.call(t,e,i.hijacked||(i.hijacked=function(t){t.propagationStopped||i(t)}),n):o.call(t,e,i,n)}),"function"==typeof t.onclick&&(n=t.onclick,t.addEventListener("click",function(t){n(t)},!1),t.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),deviceIsBlackBerry10=navigator.userAgent.indexOf("BB10")>0;FastClick.prototype.needsClick=function(t){"use strict";switch(t.nodeName.toLowerCase()){case"button":case"select":case"textarea":if(t.disabled)return!0;break;case"input":if(deviceIsIOS&&"file"===t.type||t.disabled)return!0;break;case"label":case"video":return!0}return/\bneedsclick\b/.test(t.className)},FastClick.prototype.needsFocus=function(t){"use strict";switch(t.nodeName.toLowerCase()){case"textarea":return!0;case"select":return!deviceIsAndroid;case"input":switch(t.type){case"button":case"checkbox":case"file":case"image":case"radio":case"submit":return!1}return!t.disabled&&!t.readOnly;default:return/\bneedsfocus\b/.test(t.className)}},FastClick.prototype.sendClick=function(t,e){"use strict";var i,n;document.activeElement&&document.activeElement!==t&&document.activeElement.blur(),n=e.changedTouches[0],i=document.createEvent("MouseEvents"),i.initMouseEvent(this.determineEventType(t),!0,!0,window,1,n.screenX,n.screenY,n.clientX,n.clientY,!1,!1,!1,!1,0,null),i.forwardedTouchEvent=!0,t.dispatchEvent(i)},FastClick.prototype.determineEventType=function(t){"use strict";return deviceIsAndroid&&"select"===t.tagName.toLowerCase()?"mousedown":"click"},FastClick.prototype.focus=function(t){"use strict";var e;deviceIsIOS&&t.setSelectionRange&&0!==t.type.indexOf("date")&&"time"!==t.type?(e=t.value.length,t.setSelectionRange(e,e)):t.focus()},FastClick.prototype.updateScrollParent=function(t){"use strict";var e,i;if(e=t.fastClickScrollParent,!e||!e.contains(t)){i=t;do{if(i.scrollHeight>i.offsetHeight){e=i,t.fastClickScrollParent=i;break}i=i.parentElement}while(i)}e&&(e.fastClickLastScrollTop=e.scrollTop)},FastClick.prototype.getTargetElementFromEventTarget=function(t){"use strict";return t.nodeType===Node.TEXT_NODE?t.parentNode:t},FastClick.prototype.onTouchStart=function(t){"use strict";var e,i,n;if(t.targetTouches.length>1)return!0;if(e=this.getTargetElementFromEventTarget(t.target),i=t.targetTouches[0],deviceIsIOS){if(n=window.getSelection(),n.rangeCount&&!n.isCollapsed)return!0;if(!deviceIsIOS4){if(i.identifier&&i.identifier===this.lastTouchIdentifier)return t.preventDefault(),!1;this.lastTouchIdentifier=i.identifier,this.updateScrollParent(e)}}return this.trackingClick=!0,this.trackingClickStart=t.timeStamp,this.targetElement=e,this.touchStartX=i.pageX,this.touchStartY=i.pageY,t.timeStamp-this.lastClickTime<this.tapDelay&&t.preventDefault(),!0},FastClick.prototype.touchHasMoved=function(t){"use strict";var e=t.changedTouches[0],i=this.touchBoundary;return Math.abs(e.pageX-this.touchStartX)>i||Math.abs(e.pageY-this.touchStartY)>i?!0:!1},FastClick.prototype.onTouchMove=function(t){"use strict";return this.trackingClick?((this.targetElement!==this.getTargetElementFromEventTarget(t.target)||this.touchHasMoved(t))&&(this.trackingClick=!1,this.targetElement=null),!0):!0},FastClick.prototype.findControl=function(t){"use strict";return void 0!==t.control?t.control:t.htmlFor?document.getElementById(t.htmlFor):t.querySelector("button, input:not([type=hidden]), keygen, meter, output, progress, select, textarea")},FastClick.prototype.onTouchEnd=function(t){"use strict";var e,i,n,o,r,s=this.targetElement;if(!this.trackingClick)return!0;if(t.timeStamp-this.lastClickTime<this.tapDelay)return this.cancelNextClick=!0,!0;if(this.cancelNextClick=!1,this.lastClickTime=t.timeStamp,i=this.trackingClickStart,this.trackingClick=!1,this.trackingClickStart=0,deviceIsIOSWithBadTarget&&(r=t.changedTouches[0],s=document.elementFromPoint(r.pageX-window.pageXOffset,r.pageY-window.pageYOffset)||s,s.fastClickScrollParent=this.targetElement.fastClickScrollParent),n=s.tagName.toLowerCase(),"label"===n){if(e=this.findControl(s)){if(this.focus(s),deviceIsAndroid)return!1;s=e}}else if(this.needsFocus(s))return t.timeStamp-i>100||deviceIsIOS&&window.top!==window&&"input"===n?(this.targetElement=null,!1):(this.focus(s),this.sendClick(s,t),deviceIsIOS&&"select"===n||(this.targetElement=null,t.preventDefault()),!1);return deviceIsIOS&&!deviceIsIOS4&&(o=s.fastClickScrollParent,o&&o.fastClickLastScrollTop!==o.scrollTop)?!0:(this.needsClick(s)||(t.preventDefault(),this.sendClick(s,t)),!1)},FastClick.prototype.onTouchCancel=function(){"use strict";this.trackingClick=!1,this.targetElement=null},FastClick.prototype.onMouse=function(t){"use strict";return this.targetElement?t.forwardedTouchEvent?!0:t.cancelable&&(!this.needsClick(this.targetElement)||this.cancelNextClick)?(t.stopImmediatePropagation?t.stopImmediatePropagation():t.propagationStopped=!0,t.stopPropagation(),t.preventDefault(),!1):!0:!0},FastClick.prototype.onClick=function(t){"use strict";var e;return this.trackingClick?(this.targetElement=null,this.trackingClick=!1,!0):"submit"===t.target.type&&0===t.detail?!0:(e=this.onMouse(t),e||(this.targetElement=null),e)},FastClick.prototype.destroy=function(){"use strict";var t=this.layer;deviceIsAndroid&&(t.removeEventListener("mouseover",this.onMouse,!0),t.removeEventListener("mousedown",this.onMouse,!0),t.removeEventListener("mouseup",this.onMouse,!0)),t.removeEventListener("click",this.onClick,!0),t.removeEventListener("touchstart",this.onTouchStart,!1),t.removeEventListener("touchmove",this.onTouchMove,!1),t.removeEventListener("touchend",this.onTouchEnd,!1),t.removeEventListener("touchcancel",this.onTouchCancel,!1)},FastClick.notNeeded=function(t){"use strict";var e,i,n;if("undefined"==typeof window.ontouchstart)return!0;if(i=+(/Chrome\/([0-9]+)/.exec(navigator.userAgent)||[,0])[1]){if(!deviceIsAndroid)return!0;if(e=document.querySelector("meta[name=viewport]")){if(-1!==e.content.indexOf("user-scalable=no"))return!0;if(i>31&&document.documentElement.scrollWidth<=window.outerWidth)return!0}}if(deviceIsBlackBerry10&&(n=navigator.userAgent.match(/Version\/([0-9]*)\.([0-9]*)/),n[1]>=10&&n[2]>=3&&(e=document.querySelector("meta[name=viewport]")))){if(-1!==e.content.indexOf("user-scalable=no"))return!0;if(document.documentElement.scrollWidth<=window.outerWidth)return!0}return"none"===t.style.msTouchAction?!0:!1},FastClick.attach=function(t,e){"use strict";return new FastClick(t,e)},"function"==typeof define&&"object"==typeof define.amd&&define.amd?define(function(){"use strict";return FastClick}):"undefined"!=typeof module&&module.exports?(module.exports=FastClick.attach,module.exports.FastClick=FastClick):window.FastClick=FastClick;
if ('addEventListener' in document) {
    document.addEventListener('DOMContentLoaded', function() {
        FastClick.attach(document.body);
    }, false);
}