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Filename : autosize.js
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(function(global,factory){typeof exports==='object'&&typeof module!=='undefined'?module.exports=factory():typeof define==='function'&&define.amd?define(factory):(global=global||self,global.autosize=factory());}(this,(function(){var map=typeof Map==="function"?new Map():function(){var keys=[];var values=[];return{has:function has(key){return keys.indexOf(key)>-1;},get:function get(key){return values[keys.indexOf(key)];},set:function set(key,value){if(keys.indexOf(key)===-1){keys.push(key);values.push(value);}},"delete":function _delete(key){var index=keys.indexOf(key);if(index>-1){keys.splice(index,1);values.splice(index,1);}}};}();var createEvent=function createEvent(name){return new Event(name,{bubbles:true});};try{new Event('test');}catch(e){createEvent=function createEvent(name){var evt=document.createEvent('Event');evt.initEvent(name,true,false);return evt;};}
function assign(ta){if(!ta||!ta.nodeName||ta.nodeName!=='TEXTAREA'||map.has(ta))return;var heightOffset=null;var clientWidth=null;var cachedHeight=null;function init(){var style=window.getComputedStyle(ta,null);if(style.resize==='vertical'){ta.style.resize='none';}else if(style.resize==='both'){ta.style.resize='horizontal';}
if(style.boxSizing==='content-box'){heightOffset=-(parseFloat(style.paddingTop)+parseFloat(style.paddingBottom));}else{heightOffset=parseFloat(style.borderTopWidth)+parseFloat(style.borderBottomWidth);}
if(isNaN(heightOffset)){heightOffset=0;}
update();}
function changeOverflow(value){{var width=ta.style.width;ta.style.width='0px';ta.style.width=width;}
ta.style.overflowY=value;}
function bookmarkOverflows(el){var arr=[];while(el&&el.parentNode&&el.parentNode instanceof Element){if(el.parentNode.scrollTop){el.parentNode.style.scrollBehavior='auto';arr.push([el.parentNode,el.parentNode.scrollTop]);}
el=el.parentNode;}
return function(){return arr.forEach(function(_ref){var node=_ref[0],scrollTop=_ref[1];node.scrollTop=scrollTop;node.style.scrollBehavior=null;});};}
function resize(){if(ta.scrollHeight===0){return;}
var restoreOverflows=bookmarkOverflows(ta);ta.style.height='';ta.style.height=ta.scrollHeight+heightOffset+'px';clientWidth=ta.clientWidth;restoreOverflows();}
function update(){resize();var styleHeight=Math.round(parseFloat(ta.style.height));var computed=window.getComputedStyle(ta,null);var actualHeight=computed.boxSizing==='content-box'?Math.round(parseFloat(computed.height)):ta.offsetHeight;if(actualHeight<styleHeight){if(computed.overflowY==='hidden'){changeOverflow('scroll');resize();actualHeight=computed.boxSizing==='content-box'?Math.round(parseFloat(window.getComputedStyle(ta,null).height)):ta.offsetHeight;}}else{if(computed.overflowY!=='hidden'){changeOverflow('hidden');resize();actualHeight=computed.boxSizing==='content-box'?Math.round(parseFloat(window.getComputedStyle(ta,null).height)):ta.offsetHeight;}}
if(cachedHeight!==actualHeight){cachedHeight=actualHeight;var evt=createEvent('autosize:resized');try{ta.dispatchEvent(evt);}catch(err){}}}
var pageResize=function pageResize(){if(ta.clientWidth!==clientWidth){update();}};var destroy=function(style){window.removeEventListener('resize',pageResize,false);ta.removeEventListener('input',update,false);ta.removeEventListener('keyup',update,false);ta.removeEventListener('autosize:destroy',destroy,false);ta.removeEventListener('autosize:update',update,false);Object.keys(style).forEach(function(key){ta.style[key]=style[key];});map["delete"](ta);}.bind(ta,{height:ta.style.height,resize:ta.style.resize,overflowY:ta.style.overflowY,overflowX:ta.style.overflowX,wordWrap:ta.style.wordWrap});ta.addEventListener('autosize:destroy',destroy,false);if('onpropertychange'in ta&&'oninput'in ta){ta.addEventListener('keyup',update,false);}
window.addEventListener('resize',pageResize,false);ta.addEventListener('input',update,false);ta.addEventListener('autosize:update',update,false);ta.style.overflowX='hidden';ta.style.wordWrap='break-word';map.set(ta,{destroy:destroy,update:update});init();}
function destroy(ta){var methods=map.get(ta);if(methods){methods.destroy();}}
function update(ta){var methods=map.get(ta);if(methods){methods.update();}}
var autosize=null;if(typeof window==='undefined'||typeof window.getComputedStyle!=='function'){autosize=function autosize(el){return el;};autosize.destroy=function(el){return el;};autosize.update=function(el){return el;};}else{autosize=function autosize(el,options){if(el){Array.prototype.forEach.call(el.length?el:[el],function(x){return assign(x);});}
return el;};autosize.destroy=function(el){if(el){Array.prototype.forEach.call(el.length?el:[el],destroy);}
return el;};autosize.update=function(el){if(el){Array.prototype.forEach.call(el.length?el:[el],update);}
return el;};}
var autosize$1=autosize;return autosize$1;})));