invoiceninja/public/vendor/signature_pad@5/signature_pad.umd.min.js

/*!
 * Signature Pad v5.0.2 | https://github.com/szimek/signature_pad
 * (c) 2024 Szymon Nowak | Released under the MIT license
 */
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).SignaturePad=e()}(this,(function(){"use strict";class t{constructor(t,e,i,n){if(isNaN(t)||isNaN(e))throw new Error(`Point is invalid: (${t}, ${e})`);this.x=+t,this.y=+e,this.pressure=i||0,this.time=n||Date.now()}distanceTo(t){return Math.sqrt(Math.pow(this.x-t.x,2)+Math.pow(this.y-t.y,2))}equals(t){return this.x===t.x&&this.y===t.y&&this.pressure===t.pressure&&this.time===t.time}velocityFrom(t){return this.time!==t.time?this.distanceTo(t)/(this.time-t.time):0}}class e{static fromPoints(t,i){const n=this.calculateControlPoints(t[0],t[1],t[2]).c2,s=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],n,s,t[2],i.start,i.end)}static calculateControlPoints(e,i,n){const s=e.x-i.x,o=e.y-i.y,r=i.x-n.x,h=i.y-n.y,a=(e.x+i.x)/2,c=(e.y+i.y)/2,d=(i.x+n.x)/2,l=(i.y+n.y)/2,u=Math.sqrt(s*s+o*o),v=Math.sqrt(r*r+h*h),_=v/(u+v),p=d+(a-d)*_,m=l+(c-l)*_,g=i.x-p,w=i.y-m;return{c1:new t(a+g,c+w),c2:new t(d+g,l+w)}}constructor(t,e,i,n,s,o){this.startPoint=t,this.control2=e,this.control1=i,this.endPoint=n,this.startWidth=s,this.endWidth=o}length(){let t,e,i=0;for(let n=0;n<=10;n+=1){const s=n/10,o=this.point(s,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),r=this.point(s,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(n>0){const n=o-t,s=r-e;i+=Math.sqrt(n*n+s*s)}t=o,e=r}return i}point(t,e,i,n,s){return e*(1-t)*(1-t)*(1-t)+3*i*(1-t)*(1-t)*t+3*n*(1-t)*t*t+s*t*t*t}}class i{constructor(){try{this._et=new EventTarget}catch(t){this._et=document}}addEventListener(t,e,i){this._et.addEventListener(t,e,i)}dispatchEvent(t){return this._et.dispatchEvent(t)}removeEventListener(t,e,i){this._et.removeEventListener(t,e,i)}}class n extends i{constructor(t,e={}){var i,s,o;super(),this.canvas=t,this._drawingStroke=!1,this._isEmpty=!0,this._lastPoints=[],this._data=[],this._lastVelocity=0,this._lastWidth=0,this._handleMouseDown=t=>{this._isLeftButtonPressed(t,!0)&&!this._drawingStroke&&this._strokeBegin(this._pointerEventToSignatureEvent(t))},this._handleMouseMove=t=>{this._isLeftButtonPressed(t,!0)&&this._drawingStroke?this._strokeMoveUpdate(this._pointerEventToSignatureEvent(t)):this._strokeEnd(this._pointerEventToSignatureEvent(t),!1)},this._handleMouseUp=t=>{this._isLeftButtonPressed(t)||this._strokeEnd(this._pointerEventToSignatureEvent(t))},this._handleTouchStart=t=>{1!==t.targetTouches.length||this._drawingStroke||(t.cancelable&&t.preventDefault(),this._strokeBegin(this._touchEventToSignatureEvent(t)))},this._handleTouchMove=t=>{1===t.targetTouches.length&&(t.cancelable&&t.preventDefault(),this._drawingStroke?this._strokeMoveUpdate(this._touchEventToSignatureEvent(t)):this._strokeEnd(this._touchEventToSignatureEvent(t),!1))},this._handleTouchEnd=t=>{0===t.targetTouches.length&&(t.cancelable&&t.preventDefault(),this.canvas.removeEventListener("touchmove",this._handleTouchMove),this._strokeEnd(this._touchEventToSignatureEvent(t)))},this._handlePointerDown=t=>{this._isLeftButtonPressed(t)&&!this._drawingStroke&&(t.preventDefault(),this._strokeBegin(this._pointerEventToSignatureEvent(t)))},this._handlePointerMove=t=>{this._isLeftButtonPressed(t,!0)&&this._drawingStroke?(t.preventDefault(),this._strokeMoveUpdate(this._pointerEventToSignatureEvent(t))):this._strokeEnd(this._pointerEventToSignatureEvent(t),!1)},this._handlePointerUp=t=>{this._isLeftButtonPressed(t)||(t.preventDefault(),this._strokeEnd(this._pointerEventToSignatureEvent(t)))},this.velocityFilterWeight=e.velocityFilterWeight||.7,this.minWidth=e.minWidth||.5,this.maxWidth=e.maxWidth||2.5,this.throttle=null!==(i=e.throttle)&&void 0!==i?i:16,this.minDistance=null!==(s=e.minDistance)&&void 0!==s?s:5,this.dotSize=e.dotSize||0,this.penColor=e.penColor||"black",this.backgroundColor=e.backgroundColor||"rgba(0,0,0,0)",this.compositeOperation=e.compositeOperation||"source-over",this.canvasContextOptions=null!==(o=e.canvasContextOptions)&&void 0!==o?o:{},this._strokeMoveUpdate=this.throttle?function(t,e=250){let i,n,s,o=0,r=null;const h=()=>{o=Date.now(),r=null,i=t.apply(n,s),r||(n=null,s=[])};return function(...a){const c=Date.now(),d=e-(c-o);return n=this,s=a,d<=0||d>e?(r&&(clearTimeout(r),r=null),o=c,i=t.apply(n,s),r||(n=null,s=[])):r||(r=window.setTimeout(h,d)),i}}(n.prototype._strokeUpdate,this.throttle):n.prototype._strokeUpdate,this._ctx=t.getContext("2d",this.canvasContextOptions),this.clear(),this.on()}clear(){const{_ctx:t,canvas:e}=this;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._getPointGroupOptions()),this._isEmpty=!0}fromDataURL(t,e={}){return new Promise(((i,n)=>{const s=new Image,o=e.ratio||window.devicePixelRatio||1,r=e.width||this.canvas.width/o,h=e.height||this.canvas.height/o,a=e.xOffset||0,c=e.yOffset||0;this._reset(this._getPointGroupOptions()),s.onload=()=>{this._ctx.drawImage(s,a,c,r,h),i()},s.onerror=t=>{n(t)},s.crossOrigin="anonymous",s.src=t,this._isEmpty=!1}))}toDataURL(t="image/png",e){return"image/svg+xml"===t?("object"!=typeof e&&(e=void 0),`data:image/svg+xml;base64,${btoa(this.toSVG(e))}`):("number"!=typeof e&&(e=void 0),this.canvas.toDataURL(t,e))}on(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",this.canvas.style.userSelect="none";const t=/Macintosh/.test(navigator.userAgent)&&"ontouchstart"in document;window.PointerEvent&&!t?this._handlePointerEvents():(this._handleMouseEvents(),"ontouchstart"in window&&this._handleTouchEvents())}off(){this.canvas.style.touchAction="auto",this.canvas.style.msTouchAction="auto",this.canvas.style.userSelect="auto",this.canvas.removeEventListener("pointerdown",this._handlePointerDown),this.canvas.removeEventListener("mousedown",this._handleMouseDown),this.canvas.removeEventListener("touchstart",this._handleTouchStart),this._removeMoveUpEventListeners()}_getListenerFunctions(){var t;const e=window.document===this.canvas.ownerDocument?window:null!==(t=this.canvas.ownerDocument.defaultView)&&void 0!==t?t:this.canvas.ownerDocument;return{addEventListener:e.addEventListener.bind(e),removeEventListener:e.removeEventListener.bind(e)}}_removeMoveUpEventListeners(){const{removeEventListener:t}=this._getListenerFunctions();t("pointermove",this._handlePointerMove),t("pointerup",this._handlePointerUp),t("mousemove",this._handleMouseMove),t("mouseup",this._handleMouseUp),t("touchmove",this._handleTouchMove),t("touchend",this._handleTouchEnd)}isEmpty(){return this._isEmpty}fromData(t,{clear:e=!0}={}){e&&this.clear(),this._fromData(t,this._drawCurve.bind(this),this._drawDot.bind(this)),this._data=this._data.concat(t)}toData(){return this._data}_isLeftButtonPressed(t,e){return e?1===t.buttons:!(1&~t.buttons)}_pointerEventToSignatureEvent(t){return{event:t,type:t.type,x:t.clientX,y:t.clientY,pressure:"pressure"in t?t.pressure:0}}_touchEventToSignatureEvent(t){const e=t.changedTouches[0];return{event:t,type:t.type,x:e.clientX,y:e.clientY,pressure:e.force}}_getPointGroupOptions(t){return{penColor:t&&"penColor"in t?t.penColor:this.penColor,dotSize:t&&"dotSize"in t?t.dotSize:this.dotSize,minWidth:t&&"minWidth"in t?t.minWidth:this.minWidth,maxWidth:t&&"maxWidth"in t?t.maxWidth:this.maxWidth,velocityFilterWeight:t&&"velocityFilterWeight"in t?t.velocityFilterWeight:this.velocityFilterWeight,compositeOperation:t&&"compositeOperation"in t?t.compositeOperation:this.compositeOperation}}_strokeBegin(t){if(!this.dispatchEvent(new CustomEvent("beginStroke",{detail:t,cancelable:!0})))return;const{addEventListener:e}=this._getListenerFunctions();switch(t.event.type){case"mousedown":e("mousemove",this._handleMouseMove),e("mouseup",this._handleMouseUp);break;case"touchstart":e("touchmove",this._handleTouchMove),e("touchend",this._handleTouchEnd);break;case"pointerdown":e("pointermove",this._handlePointerMove),e("pointerup",this._handlePointerUp)}this._drawingStroke=!0;const i=this._getPointGroupOptions(),n=Object.assign(Object.assign({},i),{points:[]});this._data.push(n),this._reset(i),this._strokeUpdate(t)}_strokeUpdate(t){if(!this._drawingStroke)return;if(0===this._data.length)return void this._strokeBegin(t);this.dispatchEvent(new CustomEvent("beforeUpdateStroke",{detail:t}));const e=this._createPoint(t.x,t.y,t.pressure),i=this._data[this._data.length-1],n=i.points,s=n.length>0&&n[n.length-1],o=!!s&&e.distanceTo(s)<=this.minDistance,r=this._getPointGroupOptions(i);if(!s||!s||!o){const t=this._addPoint(e,r);s?t&&this._drawCurve(t,r):this._drawDot(e,r),n.push({time:e.time,x:e.x,y:e.y,pressure:e.pressure})}this.dispatchEvent(new CustomEvent("afterUpdateStroke",{detail:t}))}_strokeEnd(t,e=!0){this._removeMoveUpEventListeners(),this._drawingStroke&&(e&&this._strokeUpdate(t),this._drawingStroke=!1,this.dispatchEvent(new CustomEvent("endStroke",{detail:t})))}_handlePointerEvents(){this._drawingStroke=!1,this.canvas.addEventListener("pointerdown",this._handlePointerDown)}_handleMouseEvents(){this._drawingStroke=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown)}_handleTouchEvents(){this.canvas.addEventListener("touchstart",this._handleTouchStart)}_reset(t){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(t.minWidth+t.maxWidth)/2,this._ctx.fillStyle=t.penColor,this._ctx.globalCompositeOperation=t.compositeOperation}_createPoint(e,i,n){const s=this.canvas.getBoundingClientRect();return new t(e-s.left,i-s.top,n,(new Date).getTime())}_addPoint(t,i){const{_lastPoints:n}=this;if(n.push(t),n.length>2){3===n.length&&n.unshift(n[0]);const t=this._calculateCurveWidths(n[1],n[2],i),s=e.fromPoints(n,t);return n.shift(),s}return null}_calculateCurveWidths(t,e,i){const n=i.velocityFilterWeight*e.velocityFrom(t)+(1-i.velocityFilterWeight)*this._lastVelocity,s=this._strokeWidth(n,i),o={end:s,start:this._lastWidth};return this._lastVelocity=n,this._lastWidth=s,o}_strokeWidth(t,e){return Math.max(e.maxWidth/(t+1),e.minWidth)}_drawCurveSegment(t,e,i){const n=this._ctx;n.moveTo(t,e),n.arc(t,e,i,0,2*Math.PI,!1),this._isEmpty=!1}_drawCurve(t,e){const i=this._ctx,n=t.endWidth-t.startWidth,s=2*Math.ceil(t.length());i.beginPath(),i.fillStyle=e.penColor;for(let i=0;i<s;i+=1){const o=i/s,r=o*o,h=r*o,a=1-o,c=a*a,d=c*a;let l=d*t.startPoint.x;l+=3*c*o*t.control1.x,l+=3*a*r*t.control2.x,l+=h*t.endPoint.x;let u=d*t.startPoint.y;u+=3*c*o*t.control1.y,u+=3*a*r*t.control2.y,u+=h*t.endPoint.y;const v=Math.min(t.startWidth+h*n,e.maxWidth);this._drawCurveSegment(l,u,v)}i.closePath(),i.fill()}_drawDot(t,e){const i=this._ctx,n=e.dotSize>0?e.dotSize:(e.minWidth+e.maxWidth)/2;i.beginPath(),this._drawCurveSegment(t.x,t.y,n),i.closePath(),i.fillStyle=e.penColor,i.fill()}_fromData(e,i,n){for(const s of e){const{points:e}=s,o=this._getPointGroupOptions(s);if(e.length>1)for(let n=0;n<e.length;n+=1){const s=e[n],r=new t(s.x,s.y,s.pressure,s.time);0===n&&this._reset(o);const h=this._addPoint(r,o);h&&i(h,o)}else this._reset(o),n(e[0],o)}}toSVG({includeBackgroundColor:t=!1}={}){const e=this._data,i=Math.max(window.devicePixelRatio||1,1),n=this.canvas.width/i,s=this.canvas.height/i,o=document.createElementNS("http://www.w3.org/2000/svg","svg");if(o.setAttribute("xmlns","http://www.w3.org/2000/svg"),o.setAttribute("xmlns:xlink","http://www.w3.org/1999/xlink"),o.setAttribute("viewBox",`0 0 ${n} ${s}`),o.setAttribute("width",n.toString()),o.setAttribute("height",s.toString()),t&&this.backgroundColor){const t=document.createElement("rect");t.setAttribute("width","100%"),t.setAttribute("height","100%"),t.setAttribute("fill",this.backgroundColor),o.appendChild(t)}return this._fromData(e,((t,{penColor:e})=>{const i=document.createElement("path");if(!(isNaN(t.control1.x)||isNaN(t.control1.y)||isNaN(t.control2.x)||isNaN(t.control2.y))){const n=`M ${t.startPoint.x.toFixed(3)},${t.startPoint.y.toFixed(3)} C ${t.control1.x.toFixed(3)},${t.control1.y.toFixed(3)} ${t.control2.x.toFixed(3)},${t.control2.y.toFixed(3)} ${t.endPoint.x.toFixed(3)},${t.endPoint.y.toFixed(3)}`;i.setAttribute("d",n),i.setAttribute("stroke-width",(2.25*t.endWidth).toFixed(3)),i.setAttribute("stroke",e),i.setAttribute("fill","none"),i.setAttribute("stroke-linecap","round"),o.appendChild(i)}}),((t,{penColor:e,dotSize:i,minWidth:n,maxWidth:s})=>{const r=document.createElement("circle"),h=i>0?i:(n+s)/2;r.setAttribute("r",h.toString()),r.setAttribute("cx",t.x.toString()),r.setAttribute("cy",t.y.toString()),r.setAttribute("fill",e),o.appendChild(r)})),o.outerHTML}}return n}));
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