8 lines
2.6 KiB
JavaScript
8 lines
2.6 KiB
JavaScript
/*!
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* jquery-captcha v1.0 (https://github.com/honguangli/jquery-captcha)
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* Copyright honguangli
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* Licensed under the MIT license
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*/
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;
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let Captcha;!function(t){"use strict";const o=["A","B","C","E","F","G","H","J","K","L","M","N","P","Q","R","S","T","W","X","Y","Z"],e=["a","b","c","e","f","g","h","j","k","l","m","n","p","q","r","s","t","w","x","y","z"],n=["0","1","2","3","4","5","6","7","8","9"];(Captcha=function(r,a){const h=this;h.element=r,h.options=t.extend(!0,{length:4,width:100,height:40,font:"bold 23px Arial",resourceType:"aA0",resourceExtra:[],clickRefresh:!0,autoRefresh:!0,caseSensitive:!1},a);let s=[];h.options.resourceType.length>0&&(-1!==h.options.resourceType.indexOf("A")&&(s=s.concat(o)),-1!==h.options.resourceType.indexOf("a")&&(s=s.concat(e)),-1!==h.options.resourceType.indexOf("0")&&(s=s.concat(n))),h.options.resourceExtra.length>0&&(s=s.concat(h.options.resourceExtra)),0===s.length&&(s=o.concat(e).concat(n)),h.resource=s,h.options.clickRefresh&&h.element.on("click",function(){h.refresh()}),h.refresh()}).prototype.refresh=function(){const t=this,o=t.element[0];o.width=t.options.width,o.height=t.options.height;const e=o.getContext("2d");e.font=t.options.font;const n=t.randomCode(),r=o.width-e.measureText(n.join("")).width-40,a=Math.floor(r/n.length);let h=10;for(let r=0;r<n.length;r++){const s=30*Math.random()*Math.PI/180,i=h,c=o.height/2+10*Math.random();e.translate(i,c),e.rotate(s),e.fillStyle=t.randomColor(),e.fillText(n[r],0,0),e.rotate(-s),e.translate(-i,-c),h+=e.measureText(n[r]).width+a+Math.floor(5*Math.random())}t.code=n;const s=n.length*Math.round(Math.random()+1)+3;for(let o=0;o<s;o++){e.strokeStyle=t.randomColor(!0),e.beginPath(),e.moveTo(Math.random()*t.options.width,Math.random()*t.options.height),e.lineTo(Math.random()*t.options.width,Math.random()*t.options.height);const o=Math.random()*t.options.width,n=Math.random()*t.options.height;e.moveTo(o,n),e.lineTo(o+1,n+1),e.stroke()}},Captcha.prototype.getCode=function(){return this.code.join("")},Captcha.prototype.valid=function(t){const o=this;let e=!1;return!(e=o.options.caseSensitive?t===o.getCode():t.toLowerCase()===o.getCode().toLowerCase())&&o.options.autoRefresh&&o.refresh(),e},Captcha.prototype.randomCode=function(){const t=this,o=[],e=t.resource.length;for(let n=0;n<t.options.length;n++){const n=t.resource[Math.floor(Math.random()*e)];o.push(n)}return o},Captcha.prototype.randomColor=function(t){const o=Math.round(255*Math.random()),e=Math.round(255*Math.random()),n=Math.round(255*Math.random());return t?"rgb("+o+","+e+","+n+","+Math.random()+")":"rgb("+o+","+e+","+n+")"}}($);
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