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jSignature.min.js
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/*
jSignature v2 "2018-11-06T13:56" "commit ID 89c22b348ab2e1d92a928d8fd992f175e8bc5cbd"
Copyright (c) 2012 Willow Systems Corp http://willow-systems.com
Copyright (c) 2010 Brinley Ang http://www.unbolt.net
MIT License <http://www.opensource.org/licenses/mit-license.php>
Simplify.js BSD
(c) 2012, Vladimir Agafonkin
mourner.github.com/simplify-js
base64 encoder
MIT, GPL
http://phpjs.org/functions/base64_encode
+ original by: Tyler Akins (http://rumkin.com)
+ improved by: Bayron Guevara
+ improved by: Thunder.m
+ improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+ bugfixed by: Pellentesque Malesuada
+ improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+ improved by: Rafal Kukawski (http://kukawski.pl)
jSignature v2 jSignature's Undo Button and undo functionality plugin
jSignature v2 jSignature's custom "base30" format export and import plugins.
jSignature v2 SVG export plugin.
*/
(function(){function q(a){var b=a.css("color"),c;a=a[0];for(var g=!1;a&&!c&&!g;){try{var d=$(a).css("background-color")}catch(l){d="transparent"}"transparent"!==d&&"rgba(0, 0, 0, 0)"!==d&&(c=d);g=a.body;a=a.parentNode}a=/rgb[a]*\((\d+),\s*(\d+),\s*(\d+)/;g=/#([AaBbCcDdEeFf\d]{2})([AaBbCcDdEeFf\d]{2})([AaBbCcDdEeFf\d]{2})/;d=void 0;if(d=b.match(a))var m={r:parseInt(d[1],10),g:parseInt(d[2],10),b:parseInt(d[3],10)};else(d=b.match(g))&&(m={r:parseInt(d[1],16),g:parseInt(d[2],16),b:parseInt(d[3],16)});
if(c)if(d=void 0,d=c.match(a))var e={r:parseInt(d[1],10),g:parseInt(d[2],10),b:parseInt(d[3],10)};else(d=c.match(g))&&(e={r:parseInt(d[1],16),g:parseInt(d[2],16),b:parseInt(d[3],16)});else e=m?127<Math.max.apply(null,[m.r,m.g,m.b])?{r:0,g:0,b:0}:{r:255,g:255,b:255}:{r:255,g:255,b:255};d=function(a){return"rgb("+[a.r,a.g,a.b].join(", ")+")"};m&&e?(a=Math.max.apply(null,[m.r,m.g,m.b]),m=Math.max.apply(null,[e.r,e.g,e.b]),m=Math.round(m+-.75*(m-a)),m={r:m,g:m,b:m}):m?(m=Math.max.apply(null,[m.r,m.g,
m.b]),a=1,127<m&&(a=-1),m=Math.round(m+96*a),m={r:m,g:m,b:m}):m={r:191,g:191,b:191};return{color:b,"background-color":e?d(e):c,"decor-color":d(m)}}function k(a,b){this.x=a;this.y=b;this.reverse=function(){return new this.constructor(-1*this.x,-1*this.y)};this._length=null;this.getLength=function(){this._length||(this._length=Math.sqrt(Math.pow(this.x,2)+Math.pow(this.y,2)));return this._length};var c=function(a){return Math.round(a/Math.abs(a))};this.resizeTo=function(a){if(0===this.x&&0===this.y)this._length=
0;else if(0===this.x)this._length=a,this.y=a*c(this.y);else if(0===this.y)this._length=a,this.x=a*c(this.x);else{var b=Math.abs(this.y/this.x),g=Math.sqrt(Math.pow(a,2)/(1+Math.pow(b,2)));b*=g;this._length=a;this.x=g*c(this.x);this.y=b*c(this.y)}return this};this.angleTo=function(a){var b=this.getLength()*a.getLength();return 0===b?0:Math.acos(Math.min(Math.max((this.x*a.x+this.y*a.y)/b,-1),1))/Math.PI}}function h(a,b){this.x=a;this.y=b;this.getVectorToCoordinates=function(a,b){return new k(a-this.x,
b-this.y)};this.getVectorFromCoordinates=function(a,b){return this.getVectorToCoordinates(a,b).reverse()};this.getVectorToPoint=function(a){return new k(a.x-this.x,a.y-this.y)};this.getVectorFromPoint=function(a){return this.getVectorToPoint(a).reverse()}}function p(a,b,c,g,d){this.data=a;this.context=b;if(a.length)for(var m=a.length,e,l,f=0;f<m;f++){e=a[f];l=e.x.length;c.call(b,e);for(var t=1;t<l;t++)g.call(b,e,t);d.call(b,e)}this.changed=function(){};this.startStrokeFn=c;this.addToStrokeFn=g;this.endStrokeFn=
d;this.inStroke=!1;this._stroke=this._lastPoint=null;this.startStroke=function(a){if(a&&"number"==typeof a.x&&"number"==typeof a.y){this._stroke={x:[a.x],y:[a.y]};this.data.push(this._stroke);this._lastPoint=a;this.inStroke=!0;var b=this._stroke,c=this.startStrokeFn,d=this.context;setTimeout(function(){c.call(d,b)},3);return a}return null};this.addToStroke=function(a){if(this.inStroke&&"number"===typeof a.x&&"number"===typeof a.y&&4<Math.abs(a.x-this._lastPoint.x)+Math.abs(a.y-this._lastPoint.y)){var b=
this._stroke.x.length;this._stroke.x.push(a.x);this._stroke.y.push(a.y);this._lastPoint=a;var c=this._stroke,d=this.addToStrokeFn,g=this.context;setTimeout(function(){d.call(g,c,b)},3);return a}return null};this.endStroke=function(){var a=this.inStroke;this.inStroke=!1;this._lastPoint=null;if(a){var b=this._stroke,c=this.endStrokeFn,d=this.context,g=this.changed;setTimeout(function(){c.call(d,b);g.call(d)},3);return!0}return null}}function n(a,b,c,g){if("ratio"===b||"%"===b.split("")[b.length-1])this.eventTokens[c+
".parentresized"]=g.subscribe(c+".parentresized",function(b,m,e,l){return function(){var d=m.width();if(d!==e){for(var l in b)b.hasOwnProperty(l)&&(g.unsubscribe(b[l]),delete b[l]);var f=a.settings;a.$parent.children().remove();for(l in a)a.hasOwnProperty(l)&&delete a[l];l=f.data;d=1*d/e;var r=[],D,E;var h=0;for(D=l.length;h<D;h++){var k=l[h];var n={x:[],y:[]};var p=0;for(E=k.x.length;p<E;p++)n.x.push(k.x[p]*d),n.y.push(k.y[p]*d);r.push(n)}f.data=r;m[c](f)}}}(this.eventTokens,this.$parent,this.$parent.width(),
1*this.canvas.width/this.canvas.height))}function w(a,b,c){var g=this.$parent=$(a);a=this.eventTokens={};this.events=new u(this);var d=$.fn.jSignature("globalEvents"),e={width:"ratio",height:"ratio",sizeRatio:4,color:"#000","background-color":"#fff","decor-color":"#eee",lineWidth:0,minFatFingerCompensation:-10,showUndoButton:!1,readOnly:!1,data:[],signatureLine:!1};$.extend(e,q(g));b&&$.extend(e,b);this.settings=e;for(var f in c)c.hasOwnProperty(f)&&c[f].call(this,f);this.events.publish("jSignature.initializing");
this.$controlbarUpper=$('<div style="padding:0 !important; margin:0 !important;width: 100% !important; height: 0 !important; -ms-touch-action: none; touch-action: none;margin-top:-1em !important; margin-bottom:1em !important;"></div>').appendTo(g);this.isCanvasEmulator=!1;b=this.canvas=this.initializeCanvas(e);c=$(b);this.$controlbarLower=$('<div style="padding:0 !important; margin:0 !important;width: 100% !important; height: 0 !important; -ms-touch-action: none; touch-action: none;margin-top:-1.5em !important; margin-bottom:1.5em !important; position: relative;"></div>').appendTo(g);
this.canvasContext=b.getContext("2d");c.data("jSignature.this",this);e.lineWidth=function(a,b){return a?a:Math.max(Math.round(b/400),2)}(e.lineWidth,b.width);this.lineCurveThreshold=3*e.lineWidth;e.cssclass&&""!=$.trim(e.cssclass)&&c.addClass(e.cssclass);this.fatFingerCompensation=0;g=function(a){var b,c,d=function(d){d=d.changedTouches&&0<d.changedTouches.length?d.changedTouches[0]:d;return new h(Math.round(d.pageX+b),Math.round(d.pageY+c)+a.fatFingerCompensation)},g=new v(750,function(){a.dataEngine.endStroke()});
this.drawEndHandler=function(b){if(!a.settings.readOnly){try{b.preventDefault()}catch(A){}g.clear();a.dataEngine.endStroke()}};this.drawStartHandler=function(e){if(!a.settings.readOnly){e.preventDefault();var m=$(a.canvas).offset();b=-1*m.left;c=-1*m.top;a.dataEngine.startStroke(d(e));g.kick()}};this.drawMoveHandler=function(b){a.settings.readOnly||(b.preventDefault(),a.dataEngine.inStroke&&(a.dataEngine.addToStroke(d(b)),g.kick()))};return this}.call({},this);(function(a,b,c){var d=this.canvas,g=
$(d);if(this.isCanvasEmulator)g.bind("mousemove.jSignature",c),g.bind("mouseup.jSignature",a),g.bind("mousedown.jSignature",b);else{var m="function"===typeof d.addEventListener;this.ontouchstart=function(g){d.onmousedown=d.onmouseup=d.onmousemove=void 0;this.fatFingerCompensation=e.minFatFingerCompensation&&-3*e.lineWidth>e.minFatFingerCompensation?-3*e.lineWidth:e.minFatFingerCompensation;b(g);m?(d.addEventListener("touchend",a),d.addEventListener("touchstart",b),d.addEventListener("touchmove",c)):
(d.ontouchend=a,d.ontouchstart=b,d.ontouchmove=c)};m?d.addEventListener("touchstart",this.ontouchstart):d.ontouchstart=ontouchstart;d.onmousedown=function(g){m?d.removeEventListener("touchstart",this.ontouchstart):d.ontouchstart=d.ontouchend=d.ontouchmove=void 0;b(g);d.onmousedown=b;d.onmouseup=a;d.onmousemove=c};window.navigator.msPointerEnabled&&(d.onmspointerdown=b,d.onmspointerup=a,d.onmspointermove=c)}}).call(this,g.drawEndHandler,g.drawStartHandler,g.drawMoveHandler);a["jSignature.windowmouseup"]=
d.subscribe("jSignature.windowmouseup",g.drawEndHandler);this.events.publish("jSignature.attachingEventHandlers");n.call(this,this,e.width.toString(10),"jSignature",d);this.resetCanvas(e.data);this.events.publish("jSignature.initialized");return this}function x(a){if(a.getContext)return!1;var b=a.ownerDocument.parentWindow,c=b.FlashCanvas?a.ownerDocument.parentWindow.FlashCanvas:"undefined"===typeof FlashCanvas?void 0:FlashCanvas;if(c){a=c.initElement(a);c=1;b&&b.screen&&b.screen.deviceXDPI&&b.screen.logicalXDPI&&
(c=1*b.screen.deviceXDPI/b.screen.logicalXDPI);if(1!==c)try{$(a).children("object").get(0).resize(Math.ceil(a.width*c),Math.ceil(a.height*c)),a.getContext("2d").scale(c,c)}catch(g){}return!0}throw Error("Canvas element does not support 2d context. jSignature cannot proceed.");}var v=function(a,b){var c;this.kick=function(){clearTimeout(c);c=setTimeout(b,a)};this.clear=function(){clearTimeout(c)};return this},u=function(a){this.topics={};this.context=a?a:this;this.publish=function(a,c,g,d){if(this.topics[a]){var b=
this.topics[a],e=Array.prototype.slice.call(arguments,1),f=[],h=[],t;var k=0;for(t=b.length;k<t;k++){var r=b[k];var D=r[0];r[1]&&(r[0]=function(){},f.push(k));h.push(D)}k=0;for(t=f.length;k<t;k++)b.splice(f[k],1);k=0;for(t=h.length;k<t;k++)h[k].apply(this.context,e)}};this.subscribe=function(a,c,g){this.topics[a]?this.topics[a].push([c,g]):this.topics[a]=[[c,g]];return{topic:a,callback:c}};this.unsubscribe=function(a){if(this.topics[a.topic])for(var b=this.topics[a.topic],g=0,d=b.length;g<d;g++)b[g]&&
b[g][0]===a.callback&&b.splice(g,1)}},y=function(a,b,c,g,d){a.beginPath();a.moveTo(b,c);a.lineTo(g,d);a.closePath();a.stroke()},C=function(a){var b=this.canvasContext,c=a.x[0];a=a.y[0];var g=this.settings.lineWidth,d=b.fillStyle;b.fillStyle=b.strokeStyle;b.fillRect(c+g/-2,a+g/-2,g,g);b.fillStyle=d},f=function(a,b){var c=new h(a.x[b-1],a.y[b-1]),g=new h(a.x[b],a.y[b]),d=c.getVectorToPoint(g);if(1<b){var e=new h(a.x[b-2],a.y[b-2]),f=e.getVectorToPoint(c);if(f.getLength()>this.lineCurveThreshold){var l=
2<b?(new h(a.x[b-3],a.y[b-3])).getVectorToPoint(e):new k(0,0);var n=.35*f.getLength(),t=f.angleTo(l.reverse()),p=d.angleTo(f.reverse());l=(new k(l.x+f.x,l.y+f.y)).resizeTo(Math.max(.05,t)*n);var r=(new k(f.x+d.x,f.y+d.y)).reverse().resizeTo(Math.max(.05,p)*n);f=this.canvasContext;n=e.x;p=e.y;t=c.x;var D=c.y,A=e.x+l.x;e=e.y+l.y;l=c.x+r.x;r=c.y+r.y;f.beginPath();f.moveTo(n,p);f.bezierCurveTo(A,e,l,r,t,D);f.closePath();f.stroke()}}d.getLength()<=this.lineCurveThreshold&&y(this.canvasContext,c.x,c.y,
g.x,g.y)},e=function(a){var b=a.x.length-1;if(0<b){var c=new h(a.x[b],a.y[b]),e=new h(a.x[b-1],a.y[b-1]),d=e.getVectorToPoint(c);if(d.getLength()>this.lineCurveThreshold)if(1<b){a=(new h(a.x[b-2],a.y[b-2])).getVectorToPoint(e);var f=(new k(a.x+d.x,a.y+d.y)).resizeTo(d.getLength()/2);d=this.canvasContext;a=e.x;b=e.y;var E=c.x,l=c.y,n=e.x+f.x;e=e.y+f.y;f=c.x;c=c.y;d.beginPath();d.moveTo(a,b);d.bezierCurveTo(n,e,f,c,E,l);d.closePath();d.stroke()}else y(this.canvasContext,e.x,e.y,c.x,c.y)}};w.prototype.resetCanvas=
function(a,b){var c=this.canvas,g=this.settings,d=this.canvasContext,m=this.isCanvasEmulator,h=c.width,l=c.height;b||d.clearRect(0,0,h+30,l+30);d.shadowColor=d.fillStyle=g["background-color"];m&&d.fillRect(0,0,h+30,l+30);d.lineWidth=Math.ceil(parseInt(g.lineWidth,10));d.lineCap=d.lineJoin="round";if(g.signatureLine){if(null!=g["decor-color"]){d.strokeStyle=g["decor-color"];d.shadowOffsetX=0;d.shadowOffsetY=0;var k=Math.round(l/5);y(d,1.5*k,l-k,h-1.5*k,l-k)}m||(d.shadowColor=d.strokeStyle,d.shadowOffsetX=
.5*d.lineWidth,d.shadowOffsetY=-.6*d.lineWidth,d.shadowBlur=0)}d.strokeStyle=g.color;a||(a=[]);d=this.dataEngine=new p(a,this,C,f,e);g.data=a;$(c).data("jSignature.data",a).data("jSignature.settings",g);d.changed=function(a,b,d){return function(){b.publish(d+".change");a.trigger("change")}}(this.$parent,this.events,"jSignature");d.changed();return!0};w.prototype.initializeCanvas=function(a){var b=document.createElement("canvas"),c=$(b);a.width===a.height&&"ratio"===a.height&&(a.width="100%");c.css({margin:0,
padding:0,border:"none",height:"ratio"!==a.height&&a.height?a.height.toString(10):1,width:"ratio"!==a.width&&a.width?a.width.toString(10):1,"-ms-touch-action":"none","touch-action":"none","background-color":a["background-color"]});c.appendTo(this.$parent);"ratio"===a.height?c.css("height",Math.round(c.width()/a.sizeRatio)):"ratio"===a.width&&c.css("width",Math.round(c.height()*a.sizeRatio));c.addClass("jSignature");b.width=c.width();b.height=c.height();this.isCanvasEmulator=x(b);b.onselectstart=function(a){a&&
a.preventDefault&&a.preventDefault();a&&a.stopPropagation&&a.stopPropagation();return!1};return b};(function(a){function b(a,b,d){var c=new Image,e=this;c.onload=function(){var a=e.getContext("2d"),b=a.shadowColor;a.shadowColor="transparent";a.drawImage(c,0,0,c.width<e.width?c.width:e.width,c.height<e.height?c.height:e.height);a.shadowColor=b};c.src="data:"+b+","+a}function c(a,b){this.find("canvas.jSignature").add(this.filter("canvas.jSignature")).data("jSignature.this").resetCanvas(a,b);return this}
function e(a,b){if(void 0===b&&"string"===typeof a&&"data:"===a.substr(0,5)&&(b=a.slice(5).split(",")[0],a=a.slice(6+b.length),b===a))return;var c=this.find("canvas.jSignature").add(this.filter("canvas.jSignature"));if(l.hasOwnProperty(b))0!==c.length&&l[b].call(c[0],a,b,function(a){return function(){return a.resetCanvas.apply(a,arguments)}}(c.data("jSignature.this")));else throw Error("jSignature is unable to find import plugin with for format '"+String(b)+"'");return this}var d=new u;(function(a,
b,c,d){var e,g=function(){a.publish(b+".parentresized")};c(d).bind("resize."+b,function(){e&&clearTimeout(e);e=setTimeout(g,500)}).bind("mouseup."+b,function(c){a.publish(b+".windowmouseup")})})(d,"jSignature",$,a);var f={},h={"default":function(a){return this.toDataURL()},"native":function(a){return a},image:function(a){a=this.toDataURL();if("string"===typeof a&&4<a.length&&"data:"===a.slice(0,5)&&-1!==a.indexOf(",")){var b=a.indexOf(",");return[a.slice(5,b),a.substr(b+1)]}return[]}},l={"native":function(a,
b,c){c(a)},image:b,"image/png;base64":b,"image/jpeg;base64":b,"image/jpg;base64":b},k=function(a){var b=!1;for(a=a.parentNode;a&&!b;)b=a.body,a=a.parentNode;return!b},n={"export":h,"import":l,instance:f},p={init:function(a){return this.each(function(){k(this)||new w(this,a,f)})},destroy:function(){return this.each(function(){if(!k(this)){var a=$(this).find("canvas").data("jSignature.this");if(a){a.$controlbarLower.remove();a.$controlbarUpper.remove();$(a.canvas).remove();for(var b in a.eventTokens)a.eventTokens.hasOwnProperty(b)&&
d.unsubscribe(a.eventTokens[b])}}})},getSettings:function(){return this.find("canvas.jSignature").add(this.filter("canvas.jSignature")).data("jSignature.this").settings},isModified:function(){return null!==this.find("canvas.jSignature").add(this.filter("canvas.jSignature")).data("jSignature.this").dataEngine._stroke},updateSetting:function(a,b,c){var d=this.find("canvas.jSignature").add(this.filter("canvas.jSignature")).data("jSignature.this");d.settings[a]=b;d.resetCanvas(c?null:d.settings.data,
!0);return d.settings[a]},clear:c,reset:c,addPlugin:function(a,b,c){n.hasOwnProperty(a)&&(n[a][b]=c);return this},listPlugins:function(a){var b=[];if(n.hasOwnProperty(a)){a=n[a];for(var c in a)a.hasOwnProperty(c)&&b.push(c)}return b},getData:function(a){var b=this.find("canvas.jSignature").add(this.filter("canvas.jSignature"));void 0===a&&(a="default");if(0!==b.length&&h.hasOwnProperty(a))return h[a].call(b.get(0),b.data("jSignature.data"),b.data("jSignature.settings"))},importData:e,setData:e,globalEvents:function(){return d},
disable:function(){this.find("input").attr("disabled",1);this.find("canvas.jSignature").addClass("disabled").data("jSignature.this").settings.readOnly=!0},enable:function(){this.find("input").removeAttr("disabled");this.find("canvas.jSignature").removeClass("disabled").data("jSignature.this").settings.readOnly=!1},events:function(){return this.find("canvas.jSignature").add(this.filter("canvas.jSignature")).data("jSignature.this").events}};$.fn.jSignature=function(a){if(a&&"object"!==typeof a){if("string"===
typeof a&&p[a])return p[a].apply(this,Array.prototype.slice.call(arguments,1));$.error("Method "+String(a)+" does not exist on jQuery.jSignature")}else return p.init.apply(this,arguments)}})(window)})();
(function(){function q(k,h,p){k=k.call(this);(function(h,k,p){h.events.subscribe(p+".change",function(){h.dataEngine.data.length?k.show():k.hide()})})(this,k,h);(function(h,k,p){var n=p+".undo";k.bind("click",function(){h.events.publish(n)});h.events.subscribe(n,function(){var k=h.dataEngine.data;k.length&&(k.pop(),h.resetCanvas(k))})})(this,k,this.events.topics.hasOwnProperty(h+".undo")?p:h)}$.fn.jSignature("addPlugin","instance","UndoButton",function(k){this.events.subscribe("jSignature.attachingEventHandlers",
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