signaturepdf/public/vendor/signature_pad.umd.min.js

!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.SignaturePad=e()}(this,function(){"use strict";var t=function(){function t(t,e,o){this.x=t,this.y=e,this.time=o||Date.now()}return t.prototype.distanceTo=function(t){return Math.sqrt(Math.pow(this.x-t.x,2)+Math.pow(this.y-t.y,2))},t.prototype.equals=function(t){return this.x===t.x&&this.y===t.y&&this.time===t.time},t.prototype.velocityFrom=function(t){return this.time!==t.time?this.distanceTo(t)/(this.time-t.time):0},t}(),e=function(){function e(t,e,o,n,i,s){this.startPoint=t,this.control2=e,this.control1=o,this.endPoint=n,this.startWidth=i,this.endWidth=s}return e.fromPoints=function(t,o){var n=this.calculateControlPoints(t[0],t[1],t[2]).c2,i=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],n,i,t[2],o.start,o.end)},e.calculateControlPoints=function(e,o,n){var i=e.x-o.x,s=e.y-o.y,r=o.x-n.x,h=o.y-n.y,a=(e.x+o.x)/2,c=(e.y+o.y)/2,u=(o.x+n.x)/2,d=(o.y+n.y)/2,l=Math.sqrt(i*i+s*s),v=Math.sqrt(r*r+h*h),p=v/(l+v),f=u+(a-u)*p,_=d+(c-d)*p,m=o.x-f,y=o.y-_;return{c1:new t(a+m,c+y),c2:new t(u+m,d+y)}},e.prototype.length=function(){for(var t,e,o=0,n=0;n<=10;n+=1){var i=n/10,s=this.point(i,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),r=this.point(i,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(n>0){var h=s-t,a=r-e;o+=Math.sqrt(h*h+a*a)}t=s,e=r}return o},e.prototype.point=function(t,e,o,n,i){return e*(1-t)*(1-t)*(1-t)+3*o*(1-t)*(1-t)*t+3*n*(1-t)*t*t+i*t*t*t},e}();return function(){function o(t,e){void 0===e&&(e={});var n=this;this.canvas=t,this.options=e,this._handleMouseDown=function(t){1===t.which&&(n._mouseButtonDown=!0,n._strokeBegin(t))},this._handleMouseMove=function(t){n._mouseButtonDown&&n._strokeMoveUpdate(t)},this._handleMouseUp=function(t){1===t.which&&n._mouseButtonDown&&(n._mouseButtonDown=!1,n._strokeEnd(t))},this._handleTouchStart=function(t){if(t.preventDefault(),1===t.targetTouches.length){var e=t.changedTouches[0];n._strokeBegin(e)}},this._handleTouchMove=function(t){t.preventDefault();var e=t.targetTouches[0];n._strokeMoveUpdate(e)},this._handleTouchEnd=function(t){if(t.target===n.canvas){t.preventDefault();var e=t.changedTouches[0];n._strokeEnd(e)}},this.velocityFilterWeight=e.velocityFilterWeight||.7,this.minWidth=e.minWidth||.5,this.maxWidth=e.maxWidth||2.5,this.throttle="throttle"in e?e.throttle:16,this.minDistance="minDistance"in e?e.minDistance:5,this.throttle?this._strokeMoveUpdate=function(t,e){void 0===e&&(e=250);var o,n,i,s=0,r=null,h=function(){s=Date.now(),r=null,o=t.apply(n,i),r||(n=null,i=[])};return function(){for(var a=[],c=0;c<arguments.length;c++)a[c]=arguments[c];var u=Date.now(),d=e-(u-s);return n=this,i=a,d<=0||d>e?(r&&(clearTimeout(r),r=null),s=u,o=t.apply(n,i),r||(n=null,i=[])):r||(r=window.setTimeout(h,d)),o}}(o.prototype._strokeUpdate,this.throttle):this._strokeMoveUpdate=o.prototype._strokeUpdate,this.dotSize=e.dotSize||function(){return(this.minWidth+this.maxWidth)/2},this.penColor=e.penColor||"black",this.backgroundColor=e.backgroundColor||"rgba(0,0,0,0)",this.onBegin=e.onBegin,this.onEnd=e.onEnd,this._ctx=t.getContext("2d"),this.clear(),this.on()}return o.prototype.clear=function(){var t=this._ctx,e=this.canvas;t.fillStyle=this.backgroundColor,t.clearRect(0,0,e.width,e.height),t.fillRect(0,0,e.width,e.height),this._data=[],this._reset(),this._isEmpty=!0},o.prototype.fromDataURL=function(t,e,o){var n=this;void 0===e&&(e={});var i=new Image,s=e.ratio||window.devicePixelRatio||1,r=e.width||this.canvas.width/s,h=e.height||this.canvas.height/s;this._reset(),i.onload=function(){n._ctx.drawImage(i,0,0,r,h),o&&o()},i.onerror=function(t){o&&o(t)},i.src=t,this._isEmpty=!1},o.prototype.toDataURL=function(t,e){switch(void 0===t&&(t="image/png"),t){case"image/svg+xml":return this._toSVG();default:return this.canvas.toDataURL(t,e)}},o.prototype.on=function(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),