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signature_pad

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signature_pad - npm Package Compare versions

Comparing version 3.0.0-beta.4 to 4.0.0

224

dist/signature_pad.js
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
* Signature Pad v4.0.0 | https://github.com/szimek/signature_pad
* (c) 2021 Szymon Nowak | Released under the MIT license
*/
class Point {
constructor(x, y, time) {
this.x = x;
this.y = y;
constructor(x, y, pressure, time) {
if (isNaN(x) || isNaN(y)) {
throw new Error(`Point is invalid: (${x}, ${y})`);
}
this.x = +x;
this.y = +y;
this.pressure = pressure || 0;
this.time = time || Date.now();

@@ -16,3 +20,6 @@ }

equals(other) {
return this.x === other.x && this.y === other.y && this.time === other.time;
return (this.x === other.x &&
this.y === other.y &&
this.pressure === other.pressure &&
this.time === other.time);
}

@@ -126,9 +133,10 @@ velocityFrom(start) {

class SignaturePad {
class SignaturePad extends EventTarget {
constructor(canvas, options = {}) {
super();
this.canvas = canvas;
this.options = options;
this._handleMouseDown = (event) => {
if (event.which === 1) {
this._mouseButtonDown = true;
if (event.buttons === 1) {
this._drawningStroke = true;
this._strokeBegin(event);

@@ -138,3 +146,3 @@ }

this._handleMouseMove = (event) => {
if (this._mouseButtonDown) {
if (this._drawningStroke) {
this._strokeMoveUpdate(event);

@@ -144,4 +152,4 @@ }

this._handleMouseUp = (event) => {
if (event.which === 1 && this._mouseButtonDown) {
this._mouseButtonDown = false;
if (event.buttons === 1 && this._drawningStroke) {
this._drawningStroke = false;
this._strokeEnd(event);

@@ -170,2 +178,21 @@ }

};
this._handlePointerStart = (event) => {
this._drawningStroke = true;
event.preventDefault();
this._strokeBegin(event);
};
this._handlePointerMove = (event) => {
if (this._drawningStroke) {
event.preventDefault();
this._strokeMoveUpdate(event);
}
};
this._handlePointerEnd = (event) => {
this._drawningStroke = false;
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
this._strokeEnd(event);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;

@@ -175,14 +202,6 @@ this.minWidth = options.minWidth || 0.5;

this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options
? options.minDistance
: 5);
this.dotSize =
options.dotSize ||
function dotSize() {
return (this.minWidth + this.maxWidth) / 2;
};
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
this.dotSize = options.dotSize || 0;
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._strokeMoveUpdate = this.throttle

@@ -204,21 +223,22 @@ ? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)

}
fromDataURL(dataUrl, options = {}, callback) {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
this._reset();
image.onload = () => {
this._ctx.drawImage(image, 0, 0, width, height);
if (callback) {
callback();
}
};
image.onerror = (error) => {
if (callback) {
callback(error);
}
};
image.src = dataUrl;
this._isEmpty = false;
fromDataURL(dataUrl, options = {}) {
return new Promise((resolve, reject) => {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
const xOffset = options.xOffset || 0;
const yOffset = options.yOffset || 0;
this._reset();
image.onload = () => {
this._ctx.drawImage(image, xOffset, yOffset, width, height);
resolve();
};
image.onerror = (error) => {
reject(error);
};
image.crossOrigin = 'anonymous';
image.src = dataUrl;
this._isEmpty = false;
});
}

@@ -249,5 +269,5 @@ toDataURL(type = 'image/png', encoderOptions) {

this.canvas.style.msTouchAction = 'auto';
this.canvas.removeEventListener('pointerdown', this._handleMouseDown);
this.canvas.removeEventListener('pointermove', this._handleMouseMove);
document.removeEventListener('pointerup', this._handleMouseUp);
this.canvas.removeEventListener('pointerdown', this._handlePointerStart);
this.canvas.removeEventListener('pointermove', this._handlePointerMove);
document.removeEventListener('pointerup', this._handlePointerEnd);
this.canvas.removeEventListener('mousedown', this._handleMouseDown);

@@ -263,6 +283,8 @@ this.canvas.removeEventListener('mousemove', this._handleMouseMove);

}
fromData(pointGroups) {
this.clear();
this._fromData(pointGroups, ({ color, curve }) => this._drawCurve({ color, curve }), ({ color, point }) => this._drawDot({ color, point }));
this._data = pointGroups;
fromData(pointGroups, { clear = true } = {}) {
if (clear) {
this.clear();
}
this._fromData(pointGroups, this._drawCurve.bind(this), this._drawDot.bind(this));
this._data = clear ? pointGroups : this._data.concat(pointGroups);
}

@@ -273,9 +295,10 @@ toData() {

_strokeBegin(event) {
this.dispatchEvent(new CustomEvent('beginStroke', { detail: event }));
const newPointGroup = {
color: this.penColor,
dotSize: this.dotSize,
minWidth: this.minWidth,
maxWidth: this.maxWidth,
penColor: this.penColor,
points: [],
};
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);

@@ -290,5 +313,11 @@ this._reset();

}
this.dispatchEvent(new CustomEvent('beforeUpdateStroke', { detail: event }));
const x = event.clientX;
const y = event.clientY;
const point = this._createPoint(x, y);
const pressure = event.pressure !== undefined
? event.pressure
: event.force !== undefined
? event.force
: 0;
const point = this._createPoint(x, y, pressure);
const lastPointGroup = this._data[this._data.length - 1];

@@ -300,10 +329,20 @@ const lastPoints = lastPointGroup.points;

: false;
const color = lastPointGroup.color;
const { penColor, dotSize, minWidth, maxWidth } = lastPointGroup;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
const curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color, point });
this._drawDot(point, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}
else if (curve) {
this._drawCurve({ color, curve });
this._drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -314,19 +353,19 @@ lastPoints.push({

y: point.y,
pressure: point.pressure,
});
}
this.dispatchEvent(new CustomEvent('afterUpdateStroke', { detail: event }));
}
_strokeEnd(event) {
this._strokeUpdate(event);
if (typeof this.onEnd === 'function') {
this.onEnd(event);
}
this.dispatchEvent(new CustomEvent('endStroke', { detail: event }));
}
_handlePointerEvents() {
this._mouseButtonDown = false;
this.canvas.addEventListener('pointerdown', this._handleMouseDown);
this.canvas.addEventListener('pointermove', this._handleMouseMove);
document.addEventListener('pointerup', this._handleMouseUp);
this._drawningStroke = false;
this.canvas.addEventListener('pointerdown', this._handlePointerStart);
this.canvas.addEventListener('pointermove', this._handlePointerMove);
document.addEventListener('pointerup', this._handlePointerEnd);
}
_handleMouseEvents() {
this._mouseButtonDown = false;
this._drawningStroke = false;
this.canvas.addEventListener('mousedown', this._handleMouseDown);

@@ -347,5 +386,5 @@ this.canvas.addEventListener('mousemove', this._handleMouseMove);

}
_createPoint(x, y) {
_createPoint(x, y, pressure) {
const rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, new Date().getTime());
return new Point(x - rect.left, y - rect.top, pressure, new Date().getTime());
}

@@ -387,8 +426,8 @@ _addPoint(point) {

}
_drawCurve({ color, curve }) {
_drawCurve(curve, options) {
const ctx = this._ctx;
const widthDelta = curve.endWidth - curve.startWidth;
const drawSteps = Math.floor(curve.length()) * 2;
const drawSteps = Math.ceil(curve.length()) * 2;
ctx.beginPath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;
for (let i = 0; i < drawSteps; i += 1) {

@@ -409,3 +448,3 @@ const t = i / drawSteps;

y += ttt * curve.endPoint.y;
const width = Math.min(curve.startWidth + ttt * widthDelta, this.maxWidth);
const width = Math.min(curve.startWidth + ttt * widthDelta, options.maxWidth);
this._drawCurveSegment(x, y, width);

@@ -416,9 +455,11 @@ }

}
_drawDot({ color, point, }) {
_drawDot(point, options) {
const ctx = this._ctx;
const width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
const width = options.dotSize > 0
? options.dotSize
: (options.minWidth + options.maxWidth) / 2;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;
ctx.fill();

@@ -428,8 +469,8 @@ }

for (const group of pointGroups) {
const { color, points } = group;
const { penColor, dotSize, minWidth, maxWidth, points } = group;
if (points.length > 1) {
for (let j = 0; j < points.length; j += 1) {
const basicPoint = points[j];
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.time);
this.penColor = color;
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.pressure, basicPoint.time);
this.penColor = penColor;
if (j === 0) {

@@ -440,3 +481,8 @@ this._reset();

if (curve) {
drawCurve({ color, curve });
drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -447,5 +493,7 @@ }

this._reset();
drawDot({
color,
point: points[0],
drawDot(points[0], {
penColor,
dotSize,
minWidth,
maxWidth,
});

@@ -465,3 +513,3 @@ }

svg.setAttribute('height', this.canvas.height.toString());
this._fromData(pointGroups, ({ color, curve }) => {
this._fromData(pointGroups, (curve, { penColor }) => {
const path = document.createElement('path');

@@ -478,3 +526,3 @@ if (!isNaN(curve.control1.x) &&

path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('stroke', penColor);
path.setAttribute('fill', 'none');

@@ -484,9 +532,9 @@ path.setAttribute('stroke-linecap', 'round');

}
}, ({ color, point }) => {
}, (point, { penColor, dotSize, minWidth, maxWidth }) => {
const circle = document.createElement('circle');
const dotSize = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
circle.setAttribute('r', dotSize.toString());
const size = dotSize > 0 ? dotSize : (minWidth + maxWidth) / 2;
circle.setAttribute('r', size.toString());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
circle.setAttribute('fill', penColor);
svg.appendChild(circle);

@@ -498,3 +546,3 @@ });

' xmlns:xlink="http://www.w3.org/1999/xlink"' +
` viewBox="${minX} ${minY} ${maxX} ${maxY}"` +
` viewBox="${minX} ${minY} ${this.canvas.width} ${this.canvas.height}"` +
` width="${maxX}"` +

@@ -519,3 +567,3 @@ ` height="${maxY}"` +

export default SignaturePad;
export { SignaturePad as default };
//# sourceMappingURL=signature_pad.js.map

6

dist/signature_pad.min.js
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
* Signature Pad v4.0.0 | https://github.com/szimek/signature_pad
* (c) 2021 Szymon Nowak | Released under the MIT license
*/
class t{constructor(t,e,i){this.x=t,this.y=e,this.time=i||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.time===t.time}velocityFrom(t){return this.time!==t.time?this.distanceTo(t)/(this.time-t.time):0}}class e{constructor(t,e,i,o,s,n){this.startPoint=t,this.control2=e,this.control1=i,this.endPoint=o,this.startWidth=s,this.endWidth=n}static fromPoints(t,i){const o=this.calculateControlPoints(t[0],t[1],t[2]).c2,s=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],o,s,t[2],i.start,i.end)}static calculateControlPoints(e,i,o){const s=e.x-i.x,n=e.y-i.y,h=i.x-o.x,a=i.y-o.y,r=(e.x+i.x)/2,c=(e.y+i.y)/2,l=(i.x+o.x)/2,d=(i.y+o.y)/2,u=Math.sqrt(s*s+n*n),v=Math.sqrt(h*h+a*a),_=v/(u+v),m=l+(r-l)*_,p=d+(c-d)*_,w=i.x-m,g=i.y-p;return{c1:new t(r+w,c+g),c2:new t(l+w,d+g)}}length(){let t,e,i=0;for(let o=0;o<=10;o+=1){const s=o/10,n=this.point(s,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),h=this.point(s,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(o>0){const o=n-t,s=h-e;i+=Math.sqrt(o*o+s*s)}t=n,e=h}return i}point(t,e,i,o,s){return e*(1-t)*(1-t)*(1-t)+3*i*(1-t)*(1-t)*t+3*o*(1-t)*t*t+s*t*t*t}}class i{constructor(t,e={}){this.canvas=t,this.options=e,this._handleMouseDown=t=>{1===t.which&&(this._mouseButtonDown=!0,this._strokeBegin(t))},this._handleMouseMove=t=>{this._mouseButtonDown&&this._strokeMoveUpdate(t)},this._handleMouseUp=t=>{1===t.which&&this._mouseButtonDown&&(this._mouseButtonDown=!1,this._strokeEnd(t))},this._handleTouchStart=t=>{if(t.preventDefault(),1===t.targetTouches.length){const e=t.changedTouches[0];this._strokeBegin(e)}},this._handleTouchMove=t=>{t.preventDefault();const e=t.targetTouches[0];this._strokeMoveUpdate(e)},this._handleTouchEnd=t=>{if(t.target===this.canvas){t.preventDefault();const e=t.changedTouches[0];this._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.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._strokeMoveUpdate=this.throttle?function(t,e=250){let i,o,s,n=0,h=null;const a=()=>{n=Date.now(),h=null,i=t.apply(o,s),h||(o=null,s=[])};return function(...r){const c=Date.now(),l=e-(c-n);return o=this,s=r,l<=0||l>e?(h&&(clearTimeout(h),h=null),n=c,i=t.apply(o,s),h||(o=null,s=[])):h||(h=window.setTimeout(a,l)),i}}(i.prototype._strokeUpdate,this.throttle):i.prototype._strokeUpdate,this._ctx=t.getContext("2d"),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._isEmpty=!0}fromDataURL(t,e={},i){const o=new Image,s=e.ratio||window.devicePixelRatio||1,n=e.width||this.canvas.width/s,h=e.height||this.canvas.height/s;this._reset(),o.onload=()=>{this._ctx.drawImage(o,0,0,n,h),i&&i()},o.onerror=t=>{i&&i(t)},o.src=t,this._isEmpty=!1}toDataURL(t="image/png",e){switch(t){case"image/svg+xml":return this._toSVG();default:return this.canvas.toDataURL(t,e)}}on(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),"ontouchstart"in window&&this._handleTouchEvents())}off(){this.canvas.style.touchAction="auto",this.canvas.style.msTouchAction="auto",this.canvas.removeEventListener("pointerdown",this._handleMouseDown),this.canvas.removeEventListener("pointermove",this._handleMouseMove),document.removeEventListener("pointerup",this._handleMouseUp),this.canvas.removeEventListener("mousedown",this._handleMouseDown),this.canvas.removeEventListener("mousemove",this._handleMouseMove),document.removeEventListener("mouseup",this._handleMouseUp),this.canvas.removeEventListener("touchstart",this._handleTouchStart),this.canvas.removeEventListener("touchmove",this._handleTouchMove),this.canvas.removeEventListener("touchend",this._handleTouchEnd)}isEmpty(){return this._isEmpty}fromData(t){this.clear(),this._fromData(t,({color:t,curve:e})=>this._drawCurve({color:t,curve:e}),({color:t,point:e})=>this._drawDot({color:t,point:e})),this._data=t}toData(){return this._data}_strokeBegin(t){const e={color:this.penColor,points:[]};"function"==typeof this.onBegin&&this.onBegin(t),this._data.push(e),this._reset(),this._strokeUpdate(t)}_strokeUpdate(t){if(0===this._data.length)return void this._strokeBegin(t);const e=t.clientX,i=t.clientY,o=this._createPoint(e,i),s=this._data[this._data.length-1],n=s.points,h=n.length>0&&n[n.length-1],a=!!h&&o.distanceTo(h)<=this.minDistance,r=s.color;if(!h||!h||!a){const t=this._addPoint(o);h?t&&this._drawCurve({color:r,curve:t}):this._drawDot({color:r,point:o}),n.push({time:o.time,x:o.x,y:o.y})}}_strokeEnd(t){this._strokeUpdate(t),"function"==typeof this.onEnd&&this.onEnd(t)}_handlePointerEvents(){this._mouseButtonDown=!1,this.canvas.addEventListener("pointerdown",this._handleMouseDown),this.canvas.addEventListener("pointermove",this._handleMouseMove),document.addEventListener("pointerup",this._handleMouseUp)}_handleMouseEvents(){this._mouseButtonDown=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown),this.canvas.addEventListener("mousemove",this._handleMouseMove),document.addEventListener("mouseup",this._handleMouseUp)}_handleTouchEvents(){this.canvas.addEventListener("touchstart",this._handleTouchStart),this.canvas.addEventListener("touchmove",this._handleTouchMove),this.canvas.addEventListener("touchend",this._handleTouchEnd)}_reset(){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(this.minWidth+this.maxWidth)/2,this._ctx.fillStyle=this.penColor}_createPoint(e,i){const o=this.canvas.getBoundingClientRect();return new t(e-o.left,i-o.top,(new Date).getTime())}_addPoint(t){const{_lastPoints:i}=this;if(i.push(t),i.length>2){3===i.length&&i.unshift(i[0]);const t=this._calculateCurveWidths(i[1],i[2]),o=e.fromPoints(i,t);return i.shift(),o}return null}_calculateCurveWidths(t,e){const i=this.velocityFilterWeight*e.velocityFrom(t)+(1-this.velocityFilterWeight)*this._lastVelocity,o=this._strokeWidth(i),s={end:o,start:this._lastWidth};return this._lastVelocity=i,this._lastWidth=o,s}_strokeWidth(t){return Math.max(this.maxWidth/(t+1),this.minWidth)}_drawCurveSegment(t,e,i){const o=this._ctx;o.moveTo(t,e),o.arc(t,e,i,0,2*Math.PI,!1),this._isEmpty=!1}_drawCurve({color:t,curve:e}){const i=this._ctx,o=e.endWidth-e.startWidth,s=2*Math.floor(e.length());i.beginPath(),i.fillStyle=t;for(let t=0;t<s;t+=1){const i=t/s,n=i*i,h=n*i,a=1-i,r=a*a,c=r*a;let l=c*e.startPoint.x;l+=3*r*i*e.control1.x,l+=3*a*n*e.control2.x,l+=h*e.endPoint.x;let d=c*e.startPoint.y;d+=3*r*i*e.control1.y,d+=3*a*n*e.control2.y,d+=h*e.endPoint.y;const u=Math.min(e.startWidth+h*o,this.maxWidth);this._drawCurveSegment(l,d,u)}i.closePath(),i.fill()}_drawDot({color:t,point:e}){const i=this._ctx,o="function"==typeof this.dotSize?this.dotSize():this.dotSize;i.beginPath(),this._drawCurveSegment(e.x,e.y,o),i.closePath(),i.fillStyle=t,i.fill()}_fromData(e,i,o){for(const s of e){const{color:e,points:n}=s;if(n.length>1)for(let o=0;o<n.length;o+=1){const s=n[o],h=new t(s.x,s.y,s.time);this.penColor=e,0===o&&this._reset();const a=this._addPoint(h);a&&i({color:e,curve:a})}else this._reset(),o({color:e,point:n[0]})}}_toSVG(){const t=this._data,e=Math.max(window.devicePixelRatio||1,1),i=this.canvas.width/e,o=this.canvas.height/e,s=document.createElementNS("http://www.w3.org/2000/svg","svg");s.setAttribute("width",this.canvas.width.toString()),s.setAttribute("height",this.canvas.height.toString()),this._fromData(t,({color:t,curve:e})=>{const i=document.createElement("path");if(!(isNaN(e.control1.x)||isNaN(e.control1.y)||isNaN(e.control2.x)||isNaN(e.control2.y))){const o=`M ${e.startPoint.x.toFixed(3)},${e.startPoint.y.toFixed(3)} C ${e.control1.x.toFixed(3)},${e.control1.y.toFixed(3)} ${e.control2.x.toFixed(3)},${e.control2.y.toFixed(3)} ${e.endPoint.x.toFixed(3)},${e.endPoint.y.toFixed(3)}`;i.setAttribute("d",o),i.setAttribute("stroke-width",(2.25*e.endWidth).toFixed(3)),i.setAttribute("stroke",t),i.setAttribute("fill","none"),i.setAttribute("stroke-linecap","round"),s.appendChild(i)}},({color:t,point:e})=>{const i=document.createElement("circle"),o="function"==typeof this.dotSize?this.dotSize():this.dotSize;i.setAttribute("r",o.toString()),i.setAttribute("cx",e.x.toString()),i.setAttribute("cy",e.y.toString()),i.setAttribute("fill",t),s.appendChild(i)});const n=`<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 ${i} ${o}" width="${i}" height="${o}">`;let h=s.innerHTML;if(void 0===h){const t=document.createElement("dummy"),e=s.childNodes;t.innerHTML="";for(let i=0;i<e.length;i+=1)t.appendChild(e[i].cloneNode(!0));h=t.innerHTML}return"data:image/svg+xml;base64,"+btoa(n+h+"</svg>")}}export default i;
class t{constructor(t,e,i,s){if(isNaN(t)||isNaN(e))throw new Error(`Point is invalid: (${t}, ${e})`);this.x=+t,this.y=+e,this.pressure=i||0,this.time=s||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{constructor(t,e,i,s,n,o){this.startPoint=t,this.control2=e,this.control1=i,this.endPoint=s,this.startWidth=n,this.endWidth=o}static fromPoints(t,i){const s=this.calculateControlPoints(t[0],t[1],t[2]).c2,n=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],s,n,t[2],i.start,i.end)}static calculateControlPoints(e,i,s){const n=e.x-i.x,o=e.y-i.y,h=i.x-s.x,r=i.y-s.y,a=(e.x+i.x)/2,d=(e.y+i.y)/2,l=(i.x+s.x)/2,c=(i.y+s.y)/2,u=Math.sqrt(n*n+o*o),v=Math.sqrt(h*h+r*r),m=v/(u+v),_=l+(a-l)*m,p=c+(d-c)*m,g=i.x-_,x=i.y-p;return{c1:new t(a+g,d+x),c2:new t(l+g,c+x)}}length(){let t,e,i=0;for(let s=0;s<=10;s+=1){const n=s/10,o=this.point(n,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),h=this.point(n,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(s>0){const s=o-t,n=h-e;i+=Math.sqrt(s*s+n*n)}t=o,e=h}return i}point(t,e,i,s,n){return e*(1-t)*(1-t)*(1-t)+3*i*(1-t)*(1-t)*t+3*s*(1-t)*t*t+n*t*t*t}}class i extends EventTarget{constructor(t,e={}){super(),this.canvas=t,this.options=e,this._handleMouseDown=t=>{1===t.buttons&&(this._drawningStroke=!0,this._strokeBegin(t))},this._handleMouseMove=t=>{this._drawningStroke&&this._strokeMoveUpdate(t)},this._handleMouseUp=t=>{1===t.buttons&&this._drawningStroke&&(this._drawningStroke=!1,this._strokeEnd(t))},this._handleTouchStart=t=>{if(t.preventDefault(),1===t.targetTouches.length){const e=t.changedTouches[0];this._strokeBegin(e)}},this._handleTouchMove=t=>{t.preventDefault();const e=t.targetTouches[0];this._strokeMoveUpdate(e)},this._handleTouchEnd=t=>{if(t.target===this.canvas){t.preventDefault();const e=t.changedTouches[0];this._strokeEnd(e)}},this._handlePointerStart=t=>{this._drawningStroke=!0,t.preventDefault(),this._strokeBegin(t)},this._handlePointerMove=t=>{this._drawningStroke&&(t.preventDefault(),this._strokeMoveUpdate(t))},this._handlePointerEnd=t=>{this._drawningStroke=!1;t.target===this.canvas&&(t.preventDefault(),this._strokeEnd(t))},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.dotSize=e.dotSize||0,this.penColor=e.penColor||"black",this.backgroundColor=e.backgroundColor||"rgba(0,0,0,0)",this._strokeMoveUpdate=this.throttle?function(t,e=250){let i,s,n,o=0,h=null;const r=()=>{o=Date.now(),h=null,i=t.apply(s,n),h||(s=null,n=[])};return function(...a){const d=Date.now(),l=e-(d-o);return s=this,n=a,l<=0||l>e?(h&&(clearTimeout(h),h=null),o=d,i=t.apply(s,n),h||(s=null,n=[])):h||(h=window.setTimeout(r,l)),i}}(i.prototype._strokeUpdate,this.throttle):i.prototype._strokeUpdate,this._ctx=t.getContext("2d"),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._isEmpty=!0}fromDataURL(t,e={}){return new Promise((i,s)=>{const n=new Image,o=e.ratio||window.devicePixelRatio||1,h=e.width||this.canvas.width/o,r=e.height||this.canvas.height/o,a=e.xOffset||0,d=e.yOffset||0;this._reset(),n.onload=()=>{this._ctx.drawImage(n,a,d,h,r),i()},n.onerror=t=>{s(t)},n.crossOrigin="anonymous",n.src=t,this._isEmpty=!1})}toDataURL(t="image/png",e){switch(t){case"image/svg+xml":return this._toSVG();default:return this.canvas.toDataURL(t,e)}}on(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),"ontouchstart"in window&&this._handleTouchEvents())}off(){this.canvas.style.touchAction="auto",this.canvas.style.msTouchAction="auto",this.canvas.removeEventListener("pointerdown",this._handlePointerStart),this.canvas.removeEventListener("pointermove",this._handlePointerMove),document.removeEventListener("pointerup",this._handlePointerEnd),this.canvas.removeEventListener("mousedown",this._handleMouseDown),this.canvas.removeEventListener("mousemove",this._handleMouseMove),document.removeEventListener("mouseup",this._handleMouseUp),this.canvas.removeEventListener("touchstart",this._handleTouchStart),this.canvas.removeEventListener("touchmove",this._handleTouchMove),this.canvas.removeEventListener("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=e?t:this._data.concat(t)}toData(){return this._data}_strokeBegin(t){this.dispatchEvent(new CustomEvent("beginStroke",{detail:t}));const e={dotSize:this.dotSize,minWidth:this.minWidth,maxWidth:this.maxWidth,penColor:this.penColor,points:[]};this._data.push(e),this._reset(),this._strokeUpdate(t)}_strokeUpdate(t){if(0===this._data.length)return void this._strokeBegin(t);this.dispatchEvent(new CustomEvent("beforeUpdateStroke",{detail:t}));const e=t.clientX,i=t.clientY,s=void 0!==t.pressure?t.pressure:void 0!==t.force?t.force:0,n=this._createPoint(e,i,s),o=this._data[this._data.length-1],h=o.points,r=h.length>0&&h[h.length-1],a=!!r&&n.distanceTo(r)<=this.minDistance,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}=o;if(!r||!r||!a){const t=this._addPoint(n);r?t&&this._drawCurve(t,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}):this._drawDot(n,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}),h.push({time:n.time,x:n.x,y:n.y,pressure:n.pressure})}this.dispatchEvent(new CustomEvent("afterUpdateStroke",{detail:t}))}_strokeEnd(t){this._strokeUpdate(t),this.dispatchEvent(new CustomEvent("endStroke",{detail:t}))}_handlePointerEvents(){this._drawningStroke=!1,this.canvas.addEventListener("pointerdown",this._handlePointerStart),this.canvas.addEventListener("pointermove",this._handlePointerMove),document.addEventListener("pointerup",this._handlePointerEnd)}_handleMouseEvents(){this._drawningStroke=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown),this.canvas.addEventListener("mousemove",this._handleMouseMove),document.addEventListener("mouseup",this._handleMouseUp)}_handleTouchEvents(){this.canvas.addEventListener("touchstart",this._handleTouchStart),this.canvas.addEventListener("touchmove",this._handleTouchMove),this.canvas.addEventListener("touchend",this._handleTouchEnd)}_reset(){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(this.minWidth+this.maxWidth)/2,this._ctx.fillStyle=this.penColor}_createPoint(e,i,s){const n=this.canvas.getBoundingClientRect();return new t(e-n.left,i-n.top,s,(new Date).getTime())}_addPoint(t){const{_lastPoints:i}=this;if(i.push(t),i.length>2){3===i.length&&i.unshift(i[0]);const t=this._calculateCurveWidths(i[1],i[2]),s=e.fromPoints(i,t);return i.shift(),s}return null}_calculateCurveWidths(t,e){const i=this.velocityFilterWeight*e.velocityFrom(t)+(1-this.velocityFilterWeight)*this._lastVelocity,s=this._strokeWidth(i),n={end:s,start:this._lastWidth};return this._lastVelocity=i,this._lastWidth=s,n}_strokeWidth(t){return Math.max(this.maxWidth/(t+1),this.minWidth)}_drawCurveSegment(t,e,i){const s=this._ctx;s.moveTo(t,e),s.arc(t,e,i,0,2*Math.PI,!1),this._isEmpty=!1}_drawCurve(t,e){const i=this._ctx,s=t.endWidth-t.startWidth,n=2*Math.ceil(t.length());i.beginPath(),i.fillStyle=e.penColor;for(let i=0;i<n;i+=1){const o=i/n,h=o*o,r=h*o,a=1-o,d=a*a,l=d*a;let c=l*t.startPoint.x;c+=3*d*o*t.control1.x,c+=3*a*h*t.control2.x,c+=r*t.endPoint.x;let u=l*t.startPoint.y;u+=3*d*o*t.control1.y,u+=3*a*h*t.control2.y,u+=r*t.endPoint.y;const v=Math.min(t.startWidth+r*s,e.maxWidth);this._drawCurveSegment(c,u,v)}i.closePath(),i.fill()}_drawDot(t,e){const i=this._ctx,s=e.dotSize>0?e.dotSize:(e.minWidth+e.maxWidth)/2;i.beginPath(),this._drawCurveSegment(t.x,t.y,s),i.closePath(),i.fillStyle=e.penColor,i.fill()}_fromData(e,i,s){for(const n of e){const{penColor:e,dotSize:o,minWidth:h,maxWidth:r,points:a}=n;if(a.length>1)for(let s=0;s<a.length;s+=1){const n=a[s],d=new t(n.x,n.y,n.pressure,n.time);this.penColor=e,0===s&&this._reset();const l=this._addPoint(d);l&&i(l,{penColor:e,dotSize:o,minWidth:h,maxWidth:r})}else this._reset(),s(a[0],{penColor:e,dotSize:o,minWidth:h,maxWidth:r})}}_toSVG(){const t=this._data,e=Math.max(window.devicePixelRatio||1,1),i=this.canvas.width/e,s=this.canvas.height/e,n=document.createElementNS("http://www.w3.org/2000/svg","svg");n.setAttribute("width",this.canvas.width.toString()),n.setAttribute("height",this.canvas.height.toString()),this._fromData(t,(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 s=`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",s),i.setAttribute("stroke-width",(2.25*t.endWidth).toFixed(3)),i.setAttribute("stroke",e),i.setAttribute("fill","none"),i.setAttribute("stroke-linecap","round"),n.appendChild(i)}},(t,{penColor:e,dotSize:i,minWidth:s,maxWidth:o})=>{const h=document.createElement("circle"),r=i>0?i:(s+o)/2;h.setAttribute("r",r.toString()),h.setAttribute("cx",t.x.toString()),h.setAttribute("cy",t.y.toString()),h.setAttribute("fill",e),n.appendChild(h)});const o=`<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 ${this.canvas.width} ${this.canvas.height}" width="${i}" height="${s}">`;let h=n.innerHTML;if(void 0===h){const t=document.createElement("dummy"),e=n.childNodes;t.innerHTML="";for(let i=0;i<e.length;i+=1)t.appendChild(e[i].cloneNode(!0));h=t.innerHTML}return"data:image/svg+xml;base64,"+btoa(o+h+"</svg>")}}export{i as default};
//# sourceMappingURL=signature_pad.min.js.map

604

dist/signature_pad.umd.js
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
* Signature Pad v4.0.0 | https://github.com/szimek/signature_pad
* (c) 2021 Szymon Nowak | Released under the MIT license
*/

@@ -10,26 +10,32 @@

(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.SignaturePad = factory());
}(this, (function () { 'use strict';
})(this, (function () { 'use strict';
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
class Point {
constructor(x, y, pressure, time) {
if (isNaN(x) || isNaN(y)) {
throw new Error(`Point is invalid: (${x}, ${y})`);
}
this.x = +x;
this.y = +y;
this.pressure = pressure || 0;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (start) {
distanceTo(start) {
return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
};
Point.prototype.equals = function (other) {
return this.x === other.x && this.y === other.y && this.time === other.time;
};
Point.prototype.velocityFrom = function (start) {
}
equals(other) {
return (this.x === other.x &&
this.y === other.y &&
this.pressure === other.pressure &&
this.time === other.time);
}
velocityFrom(start) {
return this.time !== start.time
? this.distanceTo(start) / (this.time - start.time)
: 0;
};
return Point;
}());
}
}
var Bezier = (function () {
function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
class Bezier {
constructor(startPoint, control2, control1, endPoint, startWidth, endWidth) {
this.startPoint = startPoint;

@@ -42,39 +48,39 @@ this.control2 = control2;

}
Bezier.fromPoints = function (points, widths) {
var c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
var c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
static fromPoints(points, widths) {
const c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
const c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end);
};
Bezier.calculateControlPoints = function (s1, s2, s3) {
var dx1 = s1.x - s2.x;
var dy1 = s1.y - s2.y;
var dx2 = s2.x - s3.x;
var dy2 = s2.y - s3.y;
var m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
var m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
var l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
var l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
var dxm = m1.x - m2.x;
var dym = m1.y - m2.y;
var k = l2 / (l1 + l2);
var cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
var tx = s2.x - cm.x;
var ty = s2.y - cm.y;
}
static calculateControlPoints(s1, s2, s3) {
const dx1 = s1.x - s2.x;
const dy1 = s1.y - s2.y;
const dx2 = s2.x - s3.x;
const dy2 = s2.y - s3.y;
const m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
const m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
const l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
const l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
const dxm = m1.x - m2.x;
const dym = m1.y - m2.y;
const k = l2 / (l1 + l2);
const cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
const tx = s2.x - cm.x;
const ty = s2.y - cm.y;
return {
c1: new Point(m1.x + tx, m1.y + ty),
c2: new Point(m2.x + tx, m2.y + ty)
c2: new Point(m2.x + tx, m2.y + ty),
};
};
Bezier.prototype.length = function () {
var steps = 10;
var length = 0;
var px;
var py;
for (var i = 0; i <= steps; i += 1) {
var t = i / steps;
var cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
var cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
}
length() {
const steps = 10;
let length = 0;
let px;
let py;
for (let i = 0; i <= steps; i += 1) {
const t = i / steps;
const cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
const cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
const xdiff = cx - px;
const ydiff = cy - py;
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);

@@ -86,4 +92,4 @@ }

return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
}
point(t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))

@@ -93,14 +99,12 @@ + (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)

+ (end * t * t * t);
};
return Bezier;
}());
}
}
function throttle(fn, wait) {
if (wait === void 0) { wait = 250; }
var previous = 0;
var timeout = null;
var result;
var storedContext;
var storedArgs;
var later = function () {
function throttle(fn, wait = 250) {
let previous = 0;
let timeout = null;
let result;
let storedContext;
let storedArgs;
const later = () => {
previous = Date.now();

@@ -114,9 +118,5 @@ timeout = null;

};
return function wrapper() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var now = Date.now();
var remaining = wait - (now - previous);
return function wrapper(...args) {
const now = Date.now();
const remaining = wait - (now - previous);
storedContext = this;

@@ -143,45 +143,63 @@ storedArgs = args;

var SignaturePad = (function () {
function SignaturePad(canvas, options) {
var _this = this;
if (options === void 0) { options = {}; }
class SignaturePad extends EventTarget {
constructor(canvas, options = {}) {
super();
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
this._handleMouseDown = (event) => {
if (event.buttons === 1) {
this._drawningStroke = true;
this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
this._handleMouseMove = (event) => {
if (this._drawningStroke) {
this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
this._handleMouseUp = (event) => {
if (event.buttons === 1 && this._drawningStroke) {
this._drawningStroke = false;
this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
this._handleTouchStart = (event) => {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
const touch = event.changedTouches[0];
this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
this._handleTouchMove = (event) => {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
const touch = event.targetTouches[0];
this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
this._handleTouchEnd = (event) => {
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
const touch = event.changedTouches[0];
this._strokeEnd(touch);
}
};
this._handlePointerStart = (event) => {
this._drawningStroke = true;
event.preventDefault();
this._strokeBegin(event);
};
this._handlePointerMove = (event) => {
if (this._drawningStroke) {
event.preventDefault();
this._strokeMoveUpdate(event);
}
};
this._handlePointerEnd = (event) => {
this._drawningStroke = false;
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
this._strokeEnd(event);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;

@@ -191,14 +209,6 @@ this.minWidth = options.minWidth || 0.5;

this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options
? options.minDistance
: 5);
this.dotSize =
options.dotSize ||
function dotSize() {
return (this.minWidth + this.maxWidth) / 2;
};
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
this.dotSize = options.dotSize || 0;
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._strokeMoveUpdate = this.throttle

@@ -211,4 +221,4 @@ ? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)

}
SignaturePad.prototype.clear = function () {
var _a = this, ctx = _a._ctx, canvas = _a.canvas;
clear() {
const { _ctx: ctx, canvas } = this;
ctx.fillStyle = this.backgroundColor;

@@ -220,27 +230,25 @@ ctx.clearRect(0, 0, canvas.width, canvas.height);

this._isEmpty = true;
};
SignaturePad.prototype.fromDataURL = function (dataUrl, options, callback) {
var _this = this;
if (options === void 0) { options = {}; }
var image = new Image();
var ratio = options.ratio || window.devicePixelRatio || 1;
var width = options.width || this.canvas.width / ratio;
var height = options.height || this.canvas.height / ratio;
this._reset();
image.onload = function () {
_this._ctx.drawImage(image, 0, 0, width, height);
if (callback) {
callback();
}
};
image.onerror = function (error) {
if (callback) {
callback(error);
}
};
image.src = dataUrl;
this._isEmpty = false;
};
SignaturePad.prototype.toDataURL = function (type, encoderOptions) {
if (type === void 0) { type = 'image/png'; }
}
fromDataURL(dataUrl, options = {}) {
return new Promise((resolve, reject) => {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
const xOffset = options.xOffset || 0;
const yOffset = options.yOffset || 0;
this._reset();
image.onload = () => {
this._ctx.drawImage(image, xOffset, yOffset, width, height);
resolve();
};
image.onerror = (error) => {
reject(error);
};
image.crossOrigin = 'anonymous';
image.src = dataUrl;
this._isEmpty = false;
});
}
toDataURL(type = 'image/png', encoderOptions) {
switch (type) {

@@ -252,4 +260,4 @@ case 'image/svg+xml':

}
};
SignaturePad.prototype.on = function () {
}
on() {
this.canvas.style.touchAction = 'none';

@@ -266,9 +274,9 @@ this.canvas.style.msTouchAction = 'none';

}
};
SignaturePad.prototype.off = function () {
}
off() {
this.canvas.style.touchAction = 'auto';
this.canvas.style.msTouchAction = 'auto';
this.canvas.removeEventListener('pointerdown', this._handleMouseDown);
this.canvas.removeEventListener('pointermove', this._handleMouseMove);
document.removeEventListener('pointerup', this._handleMouseUp);
this.canvas.removeEventListener('pointerdown', this._handlePointerStart);
this.canvas.removeEventListener('pointermove', this._handlePointerMove);
document.removeEventListener('pointerup', this._handlePointerEnd);
this.canvas.removeEventListener('mousedown', this._handleMouseDown);

@@ -280,34 +288,30 @@ this.canvas.removeEventListener('mousemove', this._handleMouseMove);

this.canvas.removeEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype.isEmpty = function () {
}
isEmpty() {
return this._isEmpty;
};
SignaturePad.prototype.fromData = function (pointGroups) {
var _this = this;
this.clear();
this._fromData(pointGroups, function (_a) {
var color = _a.color, curve = _a.curve;
return _this._drawCurve({ color: color, curve: curve });
}, function (_a) {
var color = _a.color, point = _a.point;
return _this._drawDot({ color: color, point: point });
});
this._data = pointGroups;
};
SignaturePad.prototype.toData = function () {
}
fromData(pointGroups, { clear = true } = {}) {
if (clear) {
this.clear();
}
this._fromData(pointGroups, this._drawCurve.bind(this), this._drawDot.bind(this));
this._data = clear ? pointGroups : this._data.concat(pointGroups);
}
toData() {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: this.penColor,
points: []
}
_strokeBegin(event) {
this.dispatchEvent(new CustomEvent('beginStroke', { detail: event }));
const newPointGroup = {
dotSize: this.dotSize,
minWidth: this.minWidth,
maxWidth: this.maxWidth,
penColor: this.penColor,
points: [],
};
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
};
SignaturePad.prototype._strokeUpdate = function (event) {
}
_strokeUpdate(event) {
if (this._data.length === 0) {

@@ -317,19 +321,35 @@ this._strokeBegin(event);

}
var x = event.clientX;
var y = event.clientY;
var point = this._createPoint(x, y);
var lastPointGroup = this._data[this._data.length - 1];
var lastPoints = lastPointGroup.points;
var lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
var isLastPointTooClose = lastPoint
this.dispatchEvent(new CustomEvent('beforeUpdateStroke', { detail: event }));
const x = event.clientX;
const y = event.clientY;
const pressure = event.pressure !== undefined
? event.pressure
: event.force !== undefined
? event.force
: 0;
const point = this._createPoint(x, y, pressure);
const lastPointGroup = this._data[this._data.length - 1];
const lastPoints = lastPointGroup.points;
const lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
const isLastPointTooClose = lastPoint
? point.distanceTo(lastPoint) <= this.minDistance
: false;
var color = lastPointGroup.color;
const { penColor, dotSize, minWidth, maxWidth } = lastPointGroup;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
this._drawDot(point, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
this._drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -339,30 +359,30 @@ lastPoints.push({

x: point.x,
y: point.y
y: point.y,
pressure: point.pressure,
});
}
};
SignaturePad.prototype._strokeEnd = function (event) {
this.dispatchEvent(new CustomEvent('afterUpdateStroke', { detail: event }));
}
_strokeEnd(event) {
this._strokeUpdate(event);
if (typeof this.onEnd === 'function') {
this.onEnd(event);
}
};
SignaturePad.prototype._handlePointerEvents = function () {
this._mouseButtonDown = false;
this.canvas.addEventListener('pointerdown', this._handleMouseDown);
this.canvas.addEventListener('pointermove', this._handleMouseMove);
document.addEventListener('pointerup', this._handleMouseUp);
};
SignaturePad.prototype._handleMouseEvents = function () {
this._mouseButtonDown = false;
this.dispatchEvent(new CustomEvent('endStroke', { detail: event }));
}
_handlePointerEvents() {
this._drawningStroke = false;
this.canvas.addEventListener('pointerdown', this._handlePointerStart);
this.canvas.addEventListener('pointermove', this._handlePointerMove);
document.addEventListener('pointerup', this._handlePointerEnd);
}
_handleMouseEvents() {
this._drawningStroke = false;
this.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
}
_handleTouchEvents() {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
}
_reset() {
this._lastPoints = [];

@@ -372,9 +392,9 @@ this._lastVelocity = 0;

this._ctx.fillStyle = this.penColor;
};
SignaturePad.prototype._createPoint = function (x, y) {
var rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, new Date().getTime());
};
SignaturePad.prototype._addPoint = function (point) {
var _lastPoints = this._lastPoints;
}
_createPoint(x, y, pressure) {
const rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, pressure, new Date().getTime());
}
_addPoint(point) {
const { _lastPoints } = this;
_lastPoints.push(point);

@@ -385,4 +405,4 @@ if (_lastPoints.length > 2) {

}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
const widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
const curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();

@@ -392,10 +412,10 @@ return curve;

return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
}
_calculateCurveWidths(startPoint, endPoint) {
const velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
(1 - this.velocityFilterWeight) * this._lastVelocity;
var newWidth = this._strokeWidth(velocity);
var widths = {
const newWidth = this._strokeWidth(velocity);
const widths = {
end: newWidth,
start: this._lastWidth
start: this._lastWidth,
};

@@ -405,35 +425,34 @@ this._lastVelocity = velocity;

return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
}
_strokeWidth(velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var ctx = this._ctx;
}
_drawCurveSegment(x, y, width) {
const ctx = this._ctx;
ctx.moveTo(x, y);
ctx.arc(x, y, width, 0, 2 * Math.PI, false);
this._isEmpty = false;
};
SignaturePad.prototype._drawCurve = function (_a) {
var color = _a.color, curve = _a.curve;
var ctx = this._ctx;
var widthDelta = curve.endWidth - curve.startWidth;
var drawSteps = Math.floor(curve.length()) * 2;
}
_drawCurve(curve, options) {
const ctx = this._ctx;
const widthDelta = curve.endWidth - curve.startWidth;
const drawSteps = Math.ceil(curve.length()) * 2;
ctx.beginPath();
ctx.fillStyle = color;
for (var i = 0; i < drawSteps; i += 1) {
var t = i / drawSteps;
var tt = t * t;
var ttt = tt * t;
var u = 1 - t;
var uu = u * u;
var uuu = uu * u;
var x = uuu * curve.startPoint.x;
ctx.fillStyle = options.penColor;
for (let i = 0; i < drawSteps; i += 1) {
const t = i / drawSteps;
const tt = t * t;
const ttt = tt * t;
const u = 1 - t;
const uu = u * u;
const uuu = uu * u;
let x = uuu * curve.startPoint.x;
x += 3 * uu * t * curve.control1.x;
x += 3 * u * tt * curve.control2.x;
x += ttt * curve.endPoint.x;
var y = uuu * curve.startPoint.y;
let y = uuu * curve.startPoint.y;
y += 3 * uu * t * curve.control1.y;
y += 3 * u * tt * curve.control2.y;
y += ttt * curve.endPoint.y;
var width = Math.min(curve.startWidth + ttt * widthDelta, this.maxWidth);
const width = Math.min(curve.startWidth + ttt * widthDelta, options.maxWidth);
this._drawCurveSegment(x, y, width);

@@ -443,28 +462,33 @@ }

ctx.fill();
};
SignaturePad.prototype._drawDot = function (_a) {
var color = _a.color, point = _a.point;
var ctx = this._ctx;
var width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
}
_drawDot(point, options) {
const ctx = this._ctx;
const width = options.dotSize > 0
? options.dotSize
: (options.minWidth + options.maxWidth) / 2;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;
ctx.fill();
};
SignaturePad.prototype._fromData = function (pointGroups, drawCurve, drawDot) {
for (var _i = 0, pointGroups_1 = pointGroups; _i < pointGroups_1.length; _i++) {
var group = pointGroups_1[_i];
var color = group.color, points = group.points;
}
_fromData(pointGroups, drawCurve, drawDot) {
for (const group of pointGroups) {
const { penColor, dotSize, minWidth, maxWidth, points } = group;
if (points.length > 1) {
for (var j = 0; j < points.length; j += 1) {
var basicPoint = points[j];
var point = new Point(basicPoint.x, basicPoint.y, basicPoint.time);
this.penColor = color;
for (let j = 0; j < points.length; j += 1) {
const basicPoint = points[j];
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.pressure, basicPoint.time);
this.penColor = penColor;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -475,23 +499,23 @@ }

this._reset();
drawDot({
color: color,
point: points[0]
drawDot(points[0], {
penColor,
dotSize,
minWidth,
maxWidth,
});
}
}
};
SignaturePad.prototype._toSVG = function () {
var _this = this;
var pointGroups = this._data;
var ratio = Math.max(window.devicePixelRatio || 1, 1);
var minX = 0;
var minY = 0;
var maxX = this.canvas.width / ratio;
var maxY = this.canvas.height / ratio;
var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
}
_toSVG() {
const pointGroups = this._data;
const ratio = Math.max(window.devicePixelRatio || 1, 1);
const minX = 0;
const minY = 0;
const maxX = this.canvas.width / ratio;
const maxY = this.canvas.height / ratio;
const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svg.setAttribute('width', this.canvas.width.toString());
svg.setAttribute('height', this.canvas.height.toString());
this._fromData(pointGroups, function (_a) {
var color = _a.color, curve = _a.curve;
var path = document.createElement('path');
this._fromData(pointGroups, (curve, { penColor }) => {
const path = document.createElement('path');
if (!isNaN(curve.control1.x) &&

@@ -501,9 +525,9 @@ !isNaN(curve.control1.y) &&

!isNaN(curve.control2.y)) {
var attr = "M " + curve.startPoint.x.toFixed(3) + "," + curve.startPoint.y.toFixed(3) + " " +
("C " + curve.control1.x.toFixed(3) + "," + curve.control1.y.toFixed(3) + " ") +
(curve.control2.x.toFixed(3) + "," + curve.control2.y.toFixed(3) + " ") +
(curve.endPoint.x.toFixed(3) + "," + curve.endPoint.y.toFixed(3));
const attr = `M ${curve.startPoint.x.toFixed(3)},${curve.startPoint.y.toFixed(3)} ` +
`C ${curve.control1.x.toFixed(3)},${curve.control1.y.toFixed(3)} ` +
`${curve.control2.x.toFixed(3)},${curve.control2.y.toFixed(3)} ` +
`${curve.endPoint.x.toFixed(3)},${curve.endPoint.y.toFixed(3)}`;
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('stroke', penColor);
path.setAttribute('fill', 'none');

@@ -513,26 +537,25 @@ path.setAttribute('stroke-linecap', 'round');

}
}, function (_a) {
var color = _a.color, point = _a.point;
var circle = document.createElement('circle');
var dotSize = typeof _this.dotSize === 'function' ? _this.dotSize() : _this.dotSize;
circle.setAttribute('r', dotSize.toString());
}, (point, { penColor, dotSize, minWidth, maxWidth }) => {
const circle = document.createElement('circle');
const size = dotSize > 0 ? dotSize : (minWidth + maxWidth) / 2;
circle.setAttribute('r', size.toString());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
circle.setAttribute('fill', penColor);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var header = '<svg' +
const prefix = 'data:image/svg+xml;base64,';
const header = '<svg' +
' xmlns="http://www.w3.org/2000/svg"' +
' xmlns:xlink="http://www.w3.org/1999/xlink"' +
(" viewBox=\"" + minX + " " + minY + " " + maxX + " " + maxY + "\"") +
(" width=\"" + maxX + "\"") +
(" height=\"" + maxY + "\"") +
` viewBox="${minX} ${minY} ${this.canvas.width} ${this.canvas.height}"` +
` width="${maxX}"` +
` height="${maxY}"` +
'>';
var body = svg.innerHTML;
let body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
const dummy = document.createElement('dummy');
const nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
for (let i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));

@@ -542,12 +565,11 @@ }

}
var footer = '</svg>';
var data = header + body + footer;
const footer = '</svg>';
const data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
}
}
return SignaturePad;
})));
}));
//# sourceMappingURL=signature_pad.umd.js.map

6

dist/signature_pad.umd.min.js
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
* Signature Pad v4.0.0 | https://github.com/szimek/signature_pad
* (c) 2021 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";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,i,n,s){this.startPoint=t,this.control2=e,this.control1=o,this.endPoint=i,this.startWidth=n,this.endWidth=s}return e.fromPoints=function(t,o){var i=this.calculateControlPoints(t[0],t[1],t[2]).c2,n=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],i,n,t[2],o.start,o.end)},e.calculateControlPoints=function(e,o,i){var n=e.x-o.x,s=e.y-o.y,r=o.x-i.x,h=o.y-i.y,a=(e.x+o.x)/2,c=(e.y+o.y)/2,u=(o.x+i.x)/2,d=(o.y+i.y)/2,l=Math.sqrt(n*n+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,i=0;i<=10;i+=1){var n=i/10,s=this.point(n,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),r=this.point(n,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(i>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,i,n){return e*(1-t)*(1-t)*(1-t)+3*o*(1-t)*(1-t)*t+3*i*(1-t)*t*t+n*t*t*t},e}();return function(){function o(t,e){var i=this;void 0===e&&(e={}),this.canvas=t,this.options=e,this._handleMouseDown=function(t){1===t.which&&(i._mouseButtonDown=!0,i._strokeBegin(t))},this._handleMouseMove=function(t){i._mouseButtonDown&&i._strokeMoveUpdate(t)},this._handleMouseUp=function(t){1===t.which&&i._mouseButtonDown&&(i._mouseButtonDown=!1,i._strokeEnd(t))},this._handleTouchStart=function(t){if(t.preventDefault(),1===t.targetTouches.length){var e=t.changedTouches[0];i._strokeBegin(e)}},this._handleTouchMove=function(t){t.preventDefault();var e=t.targetTouches[0];i._strokeMoveUpdate(e)},this._handleTouchEnd=function(t){if(t.target===i.canvas){t.preventDefault();var e=t.changedTouches[0];i._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.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._strokeMoveUpdate=this.throttle?function(t,e){void 0===e&&(e=250);var o,i,n,s=0,r=null,h=function(){s=Date.now(),r=null,o=t.apply(i,n),r||(i=null,n=[])};return function(){for(var a=[],c=0;c<arguments.length;c++)a[c]=arguments[c];var u=Date.now(),d=e-(u-s);return i=this,n=a,d<=0||d>e?(r&&(clearTimeout(r),r=null),s=u,o=t.apply(i,n),r||(i=null,n=[])):r||(r=window.setTimeout(h,d)),o}}(o.prototype._strokeUpdate,this.throttle):o.prototype._strokeUpdate,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 i=this;void 0===e&&(e={});var n=new Image,s=e.ratio||window.devicePixelRatio||1,r=e.width||this.canvas.width/s,h=e.height||this.canvas.height/s;this._reset(),n.onload=function(){i._ctx.drawImage(n,0,0,r,h),o&&o()},n.onerror=function(t){o&&o(t)},n.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(),"ontouchstart"in window&&this._handleTouchEvents())},o.prototype.off=function(){this.canvas.style.touchAction="auto",this.canvas.style.msTouchAction="auto",this.canvas.removeEventListener("pointerdown",this._handleMouseDown),this.canvas.removeEventListener("pointermove",this._handleMouseMove),document.removeEventListener("pointerup",this._handleMouseUp),this.canvas.removeEventListener("mousedown",this._handleMouseDown),this.canvas.removeEventListener("mousemove",this._handleMouseMove),document.removeEventListener("mouseup",this._handleMouseUp),this.canvas.removeEventListener("touchstart",this._handleTouchStart),this.canvas.removeEventListener("touchmove",this._handleTouchMove),this.canvas.removeEventListener("touchend",this._handleTouchEnd)},o.prototype.isEmpty=function(){return this._isEmpty},o.prototype.fromData=function(t){var e=this;this.clear(),this._fromData(t,(function(t){var o=t.color,i=t.curve;return e._drawCurve({color:o,curve:i})}),(function(t){var o=t.color,i=t.point;return e._drawDot({color:o,point:i})})),this._data=t},o.prototype.toData=function(){return this._data},o.prototype._strokeBegin=function(t){var e={color:this.penColor,points:[]};"function"==typeof this.onBegin&&this.onBegin(t),this._data.push(e),this._reset(),this._strokeUpdate(t)},o.prototype._strokeUpdate=function(t){if(0!==this._data.length){var e=t.clientX,o=t.clientY,i=this._createPoint(e,o),n=this._data[this._data.length-1],s=n.points,r=s.length>0&&s[s.length-1],h=!!r&&i.distanceTo(r)<=this.minDistance,a=n.color;if(!r||!r||!h){var c=this._addPoint(i);r?c&&this._drawCurve({color:a,curve:c}):this._drawDot({color:a,point:i}),s.push({time:i.time,x:i.x,y:i.y})}}else this._strokeBegin(t)},o.prototype._strokeEnd=function(t){this._strokeUpdate(t),"function"==typeof this.onEnd&&this.onEnd(t)},o.prototype._handlePointerEvents=function(){this._mouseButtonDown=!1,this.canvas.addEventListener("pointerdown",this._handleMouseDown),this.canvas.addEventListener("pointermove",this._handleMouseMove),document.addEventListener("pointerup",this._handleMouseUp)},o.prototype._handleMouseEvents=function(){this._mouseButtonDown=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown),this.canvas.addEventListener("mousemove",this._handleMouseMove),document.addEventListener("mouseup",this._handleMouseUp)},o.prototype._handleTouchEvents=function(){this.canvas.addEventListener("touchstart",this._handleTouchStart),this.canvas.addEventListener("touchmove",this._handleTouchMove),this.canvas.addEventListener("touchend",this._handleTouchEnd)},o.prototype._reset=function(){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(this.minWidth+this.maxWidth)/2,this._ctx.fillStyle=this.penColor},o.prototype._createPoint=function(e,o){var i=this.canvas.getBoundingClientRect();return new t(e-i.left,o-i.top,(new Date).getTime())},o.prototype._addPoint=function(t){var o=this._lastPoints;if(o.push(t),o.length>2){3===o.length&&o.unshift(o[0]);var i=this._calculateCurveWidths(o[1],o[2]),n=e.fromPoints(o,i);return o.shift(),n}return null},o.prototype._calculateCurveWidths=function(t,e){var o=this.velocityFilterWeight*e.velocityFrom(t)+(1-this.velocityFilterWeight)*this._lastVelocity,i=this._strokeWidth(o),n={end:i,start:this._lastWidth};return this._lastVelocity=o,this._lastWidth=i,n},o.prototype._strokeWidth=function(t){return Math.max(this.maxWidth/(t+1),this.minWidth)},o.prototype._drawCurveSegment=function(t,e,o){var i=this._ctx;i.moveTo(t,e),i.arc(t,e,o,0,2*Math.PI,!1),this._isEmpty=!1},o.prototype._drawCurve=function(t){var e=t.color,o=t.curve,i=this._ctx,n=o.endWidth-o.startWidth,s=2*Math.floor(o.length());i.beginPath(),i.fillStyle=e;for(var r=0;r<s;r+=1){var h=r/s,a=h*h,c=a*h,u=1-h,d=u*u,l=d*u,v=l*o.startPoint.x;v+=3*d*h*o.control1.x,v+=3*u*a*o.control2.x,v+=c*o.endPoint.x;var p=l*o.startPoint.y;p+=3*d*h*o.control1.y,p+=3*u*a*o.control2.y,p+=c*o.endPoint.y;var f=Math.min(o.startWidth+c*n,this.maxWidth);this._drawCurveSegment(v,p,f)}i.closePath(),i.fill()},o.prototype._drawDot=function(t){var e=t.color,o=t.point,i=this._ctx,n="function"==typeof this.dotSize?this.dotSize():this.dotSize;i.beginPath(),this._drawCurveSegment(o.x,o.y,n),i.closePath(),i.fillStyle=e,i.fill()},o.prototype._fromData=function(e,o,i){for(var n=0,s=e;n<s.length;n++){var r=s[n],h=r.color,a=r.points;if(a.length>1)for(var c=0;c<a.length;c+=1){var u=a[c],d=new t(u.x,u.y,u.time);this.penColor=h,0===c&&this._reset();var l=this._addPoint(d);l&&o({color:h,curve:l})}else this._reset(),i({color:h,point:a[0]})}},o.prototype._toSVG=function(){var t=this,e=this._data,o=Math.max(window.devicePixelRatio||1,1),i=this.canvas.width/o,n=this.canvas.height/o,s=document.createElementNS("http://www.w3.org/2000/svg","svg");s.setAttribute("width",this.canvas.width.toString()),s.setAttribute("height",this.canvas.height.toString()),this._fromData(e,(function(t){var e=t.color,o=t.curve,i=document.createElement("path");if(!(isNaN(o.control1.x)||isNaN(o.control1.y)||isNaN(o.control2.x)||isNaN(o.control2.y))){var n="M "+o.startPoint.x.toFixed(3)+","+o.startPoint.y.toFixed(3)+" C "+o.control1.x.toFixed(3)+","+o.control1.y.toFixed(3)+" "+o.control2.x.toFixed(3)+","+o.control2.y.toFixed(3)+" "+o.endPoint.x.toFixed(3)+","+o.endPoint.y.toFixed(3);i.setAttribute("d",n),i.setAttribute("stroke-width",(2.25*o.endWidth).toFixed(3)),i.setAttribute("stroke",e),i.setAttribute("fill","none"),i.setAttribute("stroke-linecap","round"),s.appendChild(i)}}),(function(e){var o=e.color,i=e.point,n=document.createElement("circle"),r="function"==typeof t.dotSize?t.dotSize():t.dotSize;n.setAttribute("r",r.toString()),n.setAttribute("cx",i.x.toString()),n.setAttribute("cy",i.y.toString()),n.setAttribute("fill",o),s.appendChild(n)}));var r='<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 '+i+" "+n+'" width="'+i+'" height="'+n+'">',h=s.innerHTML;if(void 0===h){var a=document.createElement("dummy"),c=s.childNodes;a.innerHTML="";for(var u=0;u<c.length;u+=1)a.appendChild(c[u].cloneNode(!0));h=a.innerHTML}return"data:image/svg+xml;base64,"+btoa(r+h+"</svg>")},o}()}));
!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{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}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,h=i.x-n.x,r=i.y-n.y,a=(e.x+i.x)/2,d=(e.y+i.y)/2,l=(i.x+n.x)/2,c=(i.y+n.y)/2,u=Math.sqrt(s*s+o*o),v=Math.sqrt(h*h+r*r),m=v/(u+v),_=l+(a-l)*m,p=c+(d-c)*m,g=i.x-_,x=i.y-p;return{c1:new t(a+g,d+x),c2:new t(l+g,c+x)}}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),h=this.point(s,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(n>0){const n=o-t,s=h-e;i+=Math.sqrt(n*n+s*s)}t=o,e=h}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 extends EventTarget{constructor(t,e={}){super(),this.canvas=t,this.options=e,this._handleMouseDown=t=>{1===t.buttons&&(this._drawningStroke=!0,this._strokeBegin(t))},this._handleMouseMove=t=>{this._drawningStroke&&this._strokeMoveUpdate(t)},this._handleMouseUp=t=>{1===t.buttons&&this._drawningStroke&&(this._drawningStroke=!1,this._strokeEnd(t))},this._handleTouchStart=t=>{if(t.preventDefault(),1===t.targetTouches.length){const e=t.changedTouches[0];this._strokeBegin(e)}},this._handleTouchMove=t=>{t.preventDefault();const e=t.targetTouches[0];this._strokeMoveUpdate(e)},this._handleTouchEnd=t=>{if(t.target===this.canvas){t.preventDefault();const e=t.changedTouches[0];this._strokeEnd(e)}},this._handlePointerStart=t=>{this._drawningStroke=!0,t.preventDefault(),this._strokeBegin(t)},this._handlePointerMove=t=>{this._drawningStroke&&(t.preventDefault(),this._strokeMoveUpdate(t))},this._handlePointerEnd=t=>{this._drawningStroke=!1;t.target===this.canvas&&(t.preventDefault(),this._strokeEnd(t))},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.dotSize=e.dotSize||0,this.penColor=e.penColor||"black",this.backgroundColor=e.backgroundColor||"rgba(0,0,0,0)",this._strokeMoveUpdate=this.throttle?function(t,e=250){let i,n,s,o=0,h=null;const r=()=>{o=Date.now(),h=null,i=t.apply(n,s),h||(n=null,s=[])};return function(...a){const d=Date.now(),l=e-(d-o);return n=this,s=a,l<=0||l>e?(h&&(clearTimeout(h),h=null),o=d,i=t.apply(n,s),h||(n=null,s=[])):h||(h=window.setTimeout(r,l)),i}}(i.prototype._strokeUpdate,this.throttle):i.prototype._strokeUpdate,this._ctx=t.getContext("2d"),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._isEmpty=!0}fromDataURL(t,e={}){return new Promise((i,n)=>{const s=new Image,o=e.ratio||window.devicePixelRatio||1,h=e.width||this.canvas.width/o,r=e.height||this.canvas.height/o,a=e.xOffset||0,d=e.yOffset||0;this._reset(),s.onload=()=>{this._ctx.drawImage(s,a,d,h,r),i()},s.onerror=t=>{n(t)},s.crossOrigin="anonymous",s.src=t,this._isEmpty=!1})}toDataURL(t="image/png",e){switch(t){case"image/svg+xml":return this._toSVG();default:return this.canvas.toDataURL(t,e)}}on(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),"ontouchstart"in window&&this._handleTouchEvents())}off(){this.canvas.style.touchAction="auto",this.canvas.style.msTouchAction="auto",this.canvas.removeEventListener("pointerdown",this._handlePointerStart),this.canvas.removeEventListener("pointermove",this._handlePointerMove),document.removeEventListener("pointerup",this._handlePointerEnd),this.canvas.removeEventListener("mousedown",this._handleMouseDown),this.canvas.removeEventListener("mousemove",this._handleMouseMove),document.removeEventListener("mouseup",this._handleMouseUp),this.canvas.removeEventListener("touchstart",this._handleTouchStart),this.canvas.removeEventListener("touchmove",this._handleTouchMove),this.canvas.removeEventListener("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=e?t:this._data.concat(t)}toData(){return this._data}_strokeBegin(t){this.dispatchEvent(new CustomEvent("beginStroke",{detail:t}));const e={dotSize:this.dotSize,minWidth:this.minWidth,maxWidth:this.maxWidth,penColor:this.penColor,points:[]};this._data.push(e),this._reset(),this._strokeUpdate(t)}_strokeUpdate(t){if(0===this._data.length)return void this._strokeBegin(t);this.dispatchEvent(new CustomEvent("beforeUpdateStroke",{detail:t}));const e=t.clientX,i=t.clientY,n=void 0!==t.pressure?t.pressure:void 0!==t.force?t.force:0,s=this._createPoint(e,i,n),o=this._data[this._data.length-1],h=o.points,r=h.length>0&&h[h.length-1],a=!!r&&s.distanceTo(r)<=this.minDistance,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}=o;if(!r||!r||!a){const t=this._addPoint(s);r?t&&this._drawCurve(t,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}):this._drawDot(s,{penColor:d,dotSize:l,minWidth:c,maxWidth:u}),h.push({time:s.time,x:s.x,y:s.y,pressure:s.pressure})}this.dispatchEvent(new CustomEvent("afterUpdateStroke",{detail:t}))}_strokeEnd(t){this._strokeUpdate(t),this.dispatchEvent(new CustomEvent("endStroke",{detail:t}))}_handlePointerEvents(){this._drawningStroke=!1,this.canvas.addEventListener("pointerdown",this._handlePointerStart),this.canvas.addEventListener("pointermove",this._handlePointerMove),document.addEventListener("pointerup",this._handlePointerEnd)}_handleMouseEvents(){this._drawningStroke=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown),this.canvas.addEventListener("mousemove",this._handleMouseMove),document.addEventListener("mouseup",this._handleMouseUp)}_handleTouchEvents(){this.canvas.addEventListener("touchstart",this._handleTouchStart),this.canvas.addEventListener("touchmove",this._handleTouchMove),this.canvas.addEventListener("touchend",this._handleTouchEnd)}_reset(){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(this.minWidth+this.maxWidth)/2,this._ctx.fillStyle=this.penColor}_createPoint(e,i,n){const s=this.canvas.getBoundingClientRect();return new t(e-s.left,i-s.top,n,(new Date).getTime())}_addPoint(t){const{_lastPoints:i}=this;if(i.push(t),i.length>2){3===i.length&&i.unshift(i[0]);const t=this._calculateCurveWidths(i[1],i[2]),n=e.fromPoints(i,t);return i.shift(),n}return null}_calculateCurveWidths(t,e){const i=this.velocityFilterWeight*e.velocityFrom(t)+(1-this.velocityFilterWeight)*this._lastVelocity,n=this._strokeWidth(i),s={end:n,start:this._lastWidth};return this._lastVelocity=i,this._lastWidth=n,s}_strokeWidth(t){return Math.max(this.maxWidth/(t+1),this.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,h=o*o,r=h*o,a=1-o,d=a*a,l=d*a;let c=l*t.startPoint.x;c+=3*d*o*t.control1.x,c+=3*a*h*t.control2.x,c+=r*t.endPoint.x;let u=l*t.startPoint.y;u+=3*d*o*t.control1.y,u+=3*a*h*t.control2.y,u+=r*t.endPoint.y;const v=Math.min(t.startWidth+r*n,e.maxWidth);this._drawCurveSegment(c,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{penColor:e,dotSize:o,minWidth:h,maxWidth:r,points:a}=s;if(a.length>1)for(let n=0;n<a.length;n+=1){const s=a[n],d=new t(s.x,s.y,s.pressure,s.time);this.penColor=e,0===n&&this._reset();const l=this._addPoint(d);l&&i(l,{penColor:e,dotSize:o,minWidth:h,maxWidth:r})}else this._reset(),n(a[0],{penColor:e,dotSize:o,minWidth:h,maxWidth:r})}}_toSVG(){const t=this._data,e=Math.max(window.devicePixelRatio||1,1),i=this.canvas.width/e,n=this.canvas.height/e,s=document.createElementNS("http://www.w3.org/2000/svg","svg");s.setAttribute("width",this.canvas.width.toString()),s.setAttribute("height",this.canvas.height.toString()),this._fromData(t,(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"),s.appendChild(i)}},(t,{penColor:e,dotSize:i,minWidth:n,maxWidth:o})=>{const h=document.createElement("circle"),r=i>0?i:(n+o)/2;h.setAttribute("r",r.toString()),h.setAttribute("cx",t.x.toString()),h.setAttribute("cy",t.y.toString()),h.setAttribute("fill",e),s.appendChild(h)});const o=`<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 ${this.canvas.width} ${this.canvas.height}" width="${i}" height="${n}">`;let h=s.innerHTML;if(void 0===h){const t=document.createElement("dummy"),e=s.childNodes;t.innerHTML="";for(let i=0;i<e.length;i+=1)t.appendChild(e[i].cloneNode(!0));h=t.innerHTML}return"data:image/svg+xml;base64,"+btoa(o+h+"</svg>")}}return i}));
//# sourceMappingURL=signature_pad.umd.min.js.map

4

dist/types/point.d.ts
export interface BasicPoint {
x: number;
y: number;
pressure: number;
time: number;

@@ -9,4 +10,5 @@ }

y: number;
pressure: number;
time: number;
constructor(x: number, y: number, time?: number);
constructor(x: number, y: number, pressure?: number, time?: number);
distanceTo(start: BasicPoint): number;

@@ -13,0 +15,0 @@ equals(other: BasicPoint): boolean;

48

dist/types/signature_pad.d.ts

@@ -6,3 +6,3 @@ /**

* Implementation of interpolation using cubic Bézier curves is taken from:
* http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
* https://web.archive.org/web/20160323213433/http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
*

@@ -15,36 +15,37 @@ * Algorithm for approximated length of a Bézier curve is taken from:

interface CSSStyleDeclaration {
msTouchAction: string;
msTouchAction: string | null;
}
}
export interface Options {
dotSize?: number | (() => number);
minWidth?: number;
maxWidth?: number;
export declare type SignatureEvent = MouseEvent | Touch | PointerEvent;
export interface FromDataOptions {
clear?: boolean;
}
export interface PointGroupOptions {
dotSize: number;
minWidth: number;
maxWidth: number;
penColor: string;
}
export interface Options extends Partial<PointGroupOptions> {
minDistance?: number;
velocityFilterWeight?: number;
backgroundColor?: string;
penColor?: string;
throttle?: number;
velocityFilterWeight?: number;
onBegin?: (event: MouseEvent | Touch) => void;
onEnd?: (event: MouseEvent | Touch) => void;
}
export interface PointGroup {
color: string;
export interface PointGroup extends PointGroupOptions {
points: BasicPoint[];
}
export default class SignaturePad {
export default class SignaturePad extends EventTarget {
private canvas;
private options;
dotSize: number | (() => number);
dotSize: number;
minWidth: number;
maxWidth: number;
penColor: string;
minDistance: number;
velocityFilterWeight: number;
backgroundColor: string;
penColor: string;
throttle: number;
velocityFilterWeight: number;
onBegin?: (event: MouseEvent | Touch) => void;
onEnd?: (event: MouseEvent | Touch) => void;
private _ctx;
private _mouseButtonDown;
private _drawningStroke;
private _isEmpty;

@@ -62,3 +63,5 @@ private _lastPoints;

height?: number;
}, callback?: (error?: string | Event) => void): void;
xOffset?: number;
yOffset?: number;
}): Promise<void>;
toDataURL(type?: string, encoderOptions?: number): string;

@@ -68,3 +71,3 @@ on(): void;

isEmpty(): boolean;
fromData(pointGroups: PointGroup[]): void;
fromData(pointGroups: PointGroup[], { clear }?: FromDataOptions): void;
toData(): PointGroup[];

@@ -77,2 +80,5 @@ private _handleMouseDown;

private _handleTouchEnd;
private _handlePointerStart;
private _handlePointerMove;
private _handlePointerEnd;
private _strokeBegin;

@@ -79,0 +85,0 @@ private _strokeUpdate;

604

docs/js/signature_pad.umd.js
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
* Signature Pad v4.0.0 | https://github.com/szimek/signature_pad
* (c) 2021 Szymon Nowak | Released under the MIT license
*/

@@ -10,26 +10,32 @@

(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.SignaturePad = factory());
}(this, (function () { 'use strict';
})(this, (function () { 'use strict';
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
class Point {
constructor(x, y, pressure, time) {
if (isNaN(x) || isNaN(y)) {
throw new Error(`Point is invalid: (${x}, ${y})`);
}
this.x = +x;
this.y = +y;
this.pressure = pressure || 0;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (start) {
distanceTo(start) {
return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
};
Point.prototype.equals = function (other) {
return this.x === other.x && this.y === other.y && this.time === other.time;
};
Point.prototype.velocityFrom = function (start) {
}
equals(other) {
return (this.x === other.x &&
this.y === other.y &&
this.pressure === other.pressure &&
this.time === other.time);
}
velocityFrom(start) {
return this.time !== start.time
? this.distanceTo(start) / (this.time - start.time)
: 0;
};
return Point;
}());
}
}
var Bezier = (function () {
function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
class Bezier {
constructor(startPoint, control2, control1, endPoint, startWidth, endWidth) {
this.startPoint = startPoint;

@@ -42,39 +48,39 @@ this.control2 = control2;

}
Bezier.fromPoints = function (points, widths) {
var c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
var c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
static fromPoints(points, widths) {
const c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
const c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end);
};
Bezier.calculateControlPoints = function (s1, s2, s3) {
var dx1 = s1.x - s2.x;
var dy1 = s1.y - s2.y;
var dx2 = s2.x - s3.x;
var dy2 = s2.y - s3.y;
var m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
var m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
var l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
var l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
var dxm = m1.x - m2.x;
var dym = m1.y - m2.y;
var k = l2 / (l1 + l2);
var cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
var tx = s2.x - cm.x;
var ty = s2.y - cm.y;
}
static calculateControlPoints(s1, s2, s3) {
const dx1 = s1.x - s2.x;
const dy1 = s1.y - s2.y;
const dx2 = s2.x - s3.x;
const dy2 = s2.y - s3.y;
const m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
const m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
const l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
const l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
const dxm = m1.x - m2.x;
const dym = m1.y - m2.y;
const k = l2 / (l1 + l2);
const cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
const tx = s2.x - cm.x;
const ty = s2.y - cm.y;
return {
c1: new Point(m1.x + tx, m1.y + ty),
c2: new Point(m2.x + tx, m2.y + ty)
c2: new Point(m2.x + tx, m2.y + ty),
};
};
Bezier.prototype.length = function () {
var steps = 10;
var length = 0;
var px;
var py;
for (var i = 0; i <= steps; i += 1) {
var t = i / steps;
var cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
var cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
}
length() {
const steps = 10;
let length = 0;
let px;
let py;
for (let i = 0; i <= steps; i += 1) {
const t = i / steps;
const cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
const cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
const xdiff = cx - px;
const ydiff = cy - py;
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);

@@ -86,4 +92,4 @@ }

return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
}
point(t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))

@@ -93,14 +99,12 @@ + (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)

+ (end * t * t * t);
};
return Bezier;
}());
}
}
function throttle(fn, wait) {
if (wait === void 0) { wait = 250; }
var previous = 0;
var timeout = null;
var result;
var storedContext;
var storedArgs;
var later = function () {
function throttle(fn, wait = 250) {
let previous = 0;
let timeout = null;
let result;
let storedContext;
let storedArgs;
const later = () => {
previous = Date.now();

@@ -114,9 +118,5 @@ timeout = null;

};
return function wrapper() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var now = Date.now();
var remaining = wait - (now - previous);
return function wrapper(...args) {
const now = Date.now();
const remaining = wait - (now - previous);
storedContext = this;

@@ -143,45 +143,63 @@ storedArgs = args;

var SignaturePad = (function () {
function SignaturePad(canvas, options) {
var _this = this;
if (options === void 0) { options = {}; }
class SignaturePad extends EventTarget {
constructor(canvas, options = {}) {
super();
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
this._handleMouseDown = (event) => {
if (event.buttons === 1) {
this._drawningStroke = true;
this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
this._handleMouseMove = (event) => {
if (this._drawningStroke) {
this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
this._handleMouseUp = (event) => {
if (event.buttons === 1 && this._drawningStroke) {
this._drawningStroke = false;
this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
this._handleTouchStart = (event) => {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
const touch = event.changedTouches[0];
this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
this._handleTouchMove = (event) => {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
const touch = event.targetTouches[0];
this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
this._handleTouchEnd = (event) => {
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
const touch = event.changedTouches[0];
this._strokeEnd(touch);
}
};
this._handlePointerStart = (event) => {
this._drawningStroke = true;
event.preventDefault();
this._strokeBegin(event);
};
this._handlePointerMove = (event) => {
if (this._drawningStroke) {
event.preventDefault();
this._strokeMoveUpdate(event);
}
};
this._handlePointerEnd = (event) => {
this._drawningStroke = false;
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
this._strokeEnd(event);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;

@@ -191,14 +209,6 @@ this.minWidth = options.minWidth || 0.5;

this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options
? options.minDistance
: 5);
this.dotSize =
options.dotSize ||
function dotSize() {
return (this.minWidth + this.maxWidth) / 2;
};
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
this.dotSize = options.dotSize || 0;
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._strokeMoveUpdate = this.throttle

@@ -211,4 +221,4 @@ ? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)

}
SignaturePad.prototype.clear = function () {
var _a = this, ctx = _a._ctx, canvas = _a.canvas;
clear() {
const { _ctx: ctx, canvas } = this;
ctx.fillStyle = this.backgroundColor;

@@ -220,27 +230,25 @@ ctx.clearRect(0, 0, canvas.width, canvas.height);

this._isEmpty = true;
};
SignaturePad.prototype.fromDataURL = function (dataUrl, options, callback) {
var _this = this;
if (options === void 0) { options = {}; }
var image = new Image();
var ratio = options.ratio || window.devicePixelRatio || 1;
var width = options.width || this.canvas.width / ratio;
var height = options.height || this.canvas.height / ratio;
this._reset();
image.onload = function () {
_this._ctx.drawImage(image, 0, 0, width, height);
if (callback) {
callback();
}
};
image.onerror = function (error) {
if (callback) {
callback(error);
}
};
image.src = dataUrl;
this._isEmpty = false;
};
SignaturePad.prototype.toDataURL = function (type, encoderOptions) {
if (type === void 0) { type = 'image/png'; }
}
fromDataURL(dataUrl, options = {}) {
return new Promise((resolve, reject) => {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
const xOffset = options.xOffset || 0;
const yOffset = options.yOffset || 0;
this._reset();
image.onload = () => {
this._ctx.drawImage(image, xOffset, yOffset, width, height);
resolve();
};
image.onerror = (error) => {
reject(error);
};
image.crossOrigin = 'anonymous';
image.src = dataUrl;
this._isEmpty = false;
});
}
toDataURL(type = 'image/png', encoderOptions) {
switch (type) {

@@ -252,4 +260,4 @@ case 'image/svg+xml':

}
};
SignaturePad.prototype.on = function () {
}
on() {
this.canvas.style.touchAction = 'none';

@@ -266,9 +274,9 @@ this.canvas.style.msTouchAction = 'none';

}
};
SignaturePad.prototype.off = function () {
}
off() {
this.canvas.style.touchAction = 'auto';
this.canvas.style.msTouchAction = 'auto';
this.canvas.removeEventListener('pointerdown', this._handleMouseDown);
this.canvas.removeEventListener('pointermove', this._handleMouseMove);
document.removeEventListener('pointerup', this._handleMouseUp);
this.canvas.removeEventListener('pointerdown', this._handlePointerStart);
this.canvas.removeEventListener('pointermove', this._handlePointerMove);
document.removeEventListener('pointerup', this._handlePointerEnd);
this.canvas.removeEventListener('mousedown', this._handleMouseDown);

@@ -280,34 +288,30 @@ this.canvas.removeEventListener('mousemove', this._handleMouseMove);

this.canvas.removeEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype.isEmpty = function () {
}
isEmpty() {
return this._isEmpty;
};
SignaturePad.prototype.fromData = function (pointGroups) {
var _this = this;
this.clear();
this._fromData(pointGroups, function (_a) {
var color = _a.color, curve = _a.curve;
return _this._drawCurve({ color: color, curve: curve });
}, function (_a) {
var color = _a.color, point = _a.point;
return _this._drawDot({ color: color, point: point });
});
this._data = pointGroups;
};
SignaturePad.prototype.toData = function () {
}
fromData(pointGroups, { clear = true } = {}) {
if (clear) {
this.clear();
}
this._fromData(pointGroups, this._drawCurve.bind(this), this._drawDot.bind(this));
this._data = clear ? pointGroups : this._data.concat(pointGroups);
}
toData() {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: this.penColor,
points: []
}
_strokeBegin(event) {
this.dispatchEvent(new CustomEvent('beginStroke', { detail: event }));
const newPointGroup = {
dotSize: this.dotSize,
minWidth: this.minWidth,
maxWidth: this.maxWidth,
penColor: this.penColor,
points: [],
};
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
};
SignaturePad.prototype._strokeUpdate = function (event) {
}
_strokeUpdate(event) {
if (this._data.length === 0) {

@@ -317,19 +321,35 @@ this._strokeBegin(event);

}
var x = event.clientX;
var y = event.clientY;
var point = this._createPoint(x, y);
var lastPointGroup = this._data[this._data.length - 1];
var lastPoints = lastPointGroup.points;
var lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
var isLastPointTooClose = lastPoint
this.dispatchEvent(new CustomEvent('beforeUpdateStroke', { detail: event }));
const x = event.clientX;
const y = event.clientY;
const pressure = event.pressure !== undefined
? event.pressure
: event.force !== undefined
? event.force
: 0;
const point = this._createPoint(x, y, pressure);
const lastPointGroup = this._data[this._data.length - 1];
const lastPoints = lastPointGroup.points;
const lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
const isLastPointTooClose = lastPoint
? point.distanceTo(lastPoint) <= this.minDistance
: false;
var color = lastPointGroup.color;
const { penColor, dotSize, minWidth, maxWidth } = lastPointGroup;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
this._drawDot(point, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
this._drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -339,30 +359,30 @@ lastPoints.push({

x: point.x,
y: point.y
y: point.y,
pressure: point.pressure,
});
}
};
SignaturePad.prototype._strokeEnd = function (event) {
this.dispatchEvent(new CustomEvent('afterUpdateStroke', { detail: event }));
}
_strokeEnd(event) {
this._strokeUpdate(event);
if (typeof this.onEnd === 'function') {
this.onEnd(event);
}
};
SignaturePad.prototype._handlePointerEvents = function () {
this._mouseButtonDown = false;
this.canvas.addEventListener('pointerdown', this._handleMouseDown);
this.canvas.addEventListener('pointermove', this._handleMouseMove);
document.addEventListener('pointerup', this._handleMouseUp);
};
SignaturePad.prototype._handleMouseEvents = function () {
this._mouseButtonDown = false;
this.dispatchEvent(new CustomEvent('endStroke', { detail: event }));
}
_handlePointerEvents() {
this._drawningStroke = false;
this.canvas.addEventListener('pointerdown', this._handlePointerStart);
this.canvas.addEventListener('pointermove', this._handlePointerMove);
document.addEventListener('pointerup', this._handlePointerEnd);
}
_handleMouseEvents() {
this._drawningStroke = false;
this.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
}
_handleTouchEvents() {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
}
_reset() {
this._lastPoints = [];

@@ -372,9 +392,9 @@ this._lastVelocity = 0;

this._ctx.fillStyle = this.penColor;
};
SignaturePad.prototype._createPoint = function (x, y) {
var rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, new Date().getTime());
};
SignaturePad.prototype._addPoint = function (point) {
var _lastPoints = this._lastPoints;
}
_createPoint(x, y, pressure) {
const rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, pressure, new Date().getTime());
}
_addPoint(point) {
const { _lastPoints } = this;
_lastPoints.push(point);

@@ -385,4 +405,4 @@ if (_lastPoints.length > 2) {

}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
const widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
const curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();

@@ -392,10 +412,10 @@ return curve;

return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
}
_calculateCurveWidths(startPoint, endPoint) {
const velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
(1 - this.velocityFilterWeight) * this._lastVelocity;
var newWidth = this._strokeWidth(velocity);
var widths = {
const newWidth = this._strokeWidth(velocity);
const widths = {
end: newWidth,
start: this._lastWidth
start: this._lastWidth,
};

@@ -405,35 +425,34 @@ this._lastVelocity = velocity;

return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
}
_strokeWidth(velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var ctx = this._ctx;
}
_drawCurveSegment(x, y, width) {
const ctx = this._ctx;
ctx.moveTo(x, y);
ctx.arc(x, y, width, 0, 2 * Math.PI, false);
this._isEmpty = false;
};
SignaturePad.prototype._drawCurve = function (_a) {
var color = _a.color, curve = _a.curve;
var ctx = this._ctx;
var widthDelta = curve.endWidth - curve.startWidth;
var drawSteps = Math.floor(curve.length()) * 2;
}
_drawCurve(curve, options) {
const ctx = this._ctx;
const widthDelta = curve.endWidth - curve.startWidth;
const drawSteps = Math.ceil(curve.length()) * 2;
ctx.beginPath();
ctx.fillStyle = color;
for (var i = 0; i < drawSteps; i += 1) {
var t = i / drawSteps;
var tt = t * t;
var ttt = tt * t;
var u = 1 - t;
var uu = u * u;
var uuu = uu * u;
var x = uuu * curve.startPoint.x;
ctx.fillStyle = options.penColor;
for (let i = 0; i < drawSteps; i += 1) {
const t = i / drawSteps;
const tt = t * t;
const ttt = tt * t;
const u = 1 - t;
const uu = u * u;
const uuu = uu * u;
let x = uuu * curve.startPoint.x;
x += 3 * uu * t * curve.control1.x;
x += 3 * u * tt * curve.control2.x;
x += ttt * curve.endPoint.x;
var y = uuu * curve.startPoint.y;
let y = uuu * curve.startPoint.y;
y += 3 * uu * t * curve.control1.y;
y += 3 * u * tt * curve.control2.y;
y += ttt * curve.endPoint.y;
var width = Math.min(curve.startWidth + ttt * widthDelta, this.maxWidth);
const width = Math.min(curve.startWidth + ttt * widthDelta, options.maxWidth);
this._drawCurveSegment(x, y, width);

@@ -443,28 +462,33 @@ }

ctx.fill();
};
SignaturePad.prototype._drawDot = function (_a) {
var color = _a.color, point = _a.point;
var ctx = this._ctx;
var width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
}
_drawDot(point, options) {
const ctx = this._ctx;
const width = options.dotSize > 0
? options.dotSize
: (options.minWidth + options.maxWidth) / 2;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;
ctx.fill();
};
SignaturePad.prototype._fromData = function (pointGroups, drawCurve, drawDot) {
for (var _i = 0, pointGroups_1 = pointGroups; _i < pointGroups_1.length; _i++) {
var group = pointGroups_1[_i];
var color = group.color, points = group.points;
}
_fromData(pointGroups, drawCurve, drawDot) {
for (const group of pointGroups) {
const { penColor, dotSize, minWidth, maxWidth, points } = group;
if (points.length > 1) {
for (var j = 0; j < points.length; j += 1) {
var basicPoint = points[j];
var point = new Point(basicPoint.x, basicPoint.y, basicPoint.time);
this.penColor = color;
for (let j = 0; j < points.length; j += 1) {
const basicPoint = points[j];
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.pressure, basicPoint.time);
this.penColor = penColor;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -475,23 +499,23 @@ }

this._reset();
drawDot({
color: color,
point: points[0]
drawDot(points[0], {
penColor,
dotSize,
minWidth,
maxWidth,
});
}
}
};
SignaturePad.prototype._toSVG = function () {
var _this = this;
var pointGroups = this._data;
var ratio = Math.max(window.devicePixelRatio || 1, 1);
var minX = 0;
var minY = 0;
var maxX = this.canvas.width / ratio;
var maxY = this.canvas.height / ratio;
var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
}
_toSVG() {
const pointGroups = this._data;
const ratio = Math.max(window.devicePixelRatio || 1, 1);
const minX = 0;
const minY = 0;
const maxX = this.canvas.width / ratio;
const maxY = this.canvas.height / ratio;
const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svg.setAttribute('width', this.canvas.width.toString());
svg.setAttribute('height', this.canvas.height.toString());
this._fromData(pointGroups, function (_a) {
var color = _a.color, curve = _a.curve;
var path = document.createElement('path');
this._fromData(pointGroups, (curve, { penColor }) => {
const path = document.createElement('path');
if (!isNaN(curve.control1.x) &&

@@ -501,9 +525,9 @@ !isNaN(curve.control1.y) &&

!isNaN(curve.control2.y)) {
var attr = "M " + curve.startPoint.x.toFixed(3) + "," + curve.startPoint.y.toFixed(3) + " " +
("C " + curve.control1.x.toFixed(3) + "," + curve.control1.y.toFixed(3) + " ") +
(curve.control2.x.toFixed(3) + "," + curve.control2.y.toFixed(3) + " ") +
(curve.endPoint.x.toFixed(3) + "," + curve.endPoint.y.toFixed(3));
const attr = `M ${curve.startPoint.x.toFixed(3)},${curve.startPoint.y.toFixed(3)} ` +
`C ${curve.control1.x.toFixed(3)},${curve.control1.y.toFixed(3)} ` +
`${curve.control2.x.toFixed(3)},${curve.control2.y.toFixed(3)} ` +
`${curve.endPoint.x.toFixed(3)},${curve.endPoint.y.toFixed(3)}`;
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('stroke', penColor);
path.setAttribute('fill', 'none');

@@ -513,26 +537,25 @@ path.setAttribute('stroke-linecap', 'round');

}
}, function (_a) {
var color = _a.color, point = _a.point;
var circle = document.createElement('circle');
var dotSize = typeof _this.dotSize === 'function' ? _this.dotSize() : _this.dotSize;
circle.setAttribute('r', dotSize.toString());
}, (point, { penColor, dotSize, minWidth, maxWidth }) => {
const circle = document.createElement('circle');
const size = dotSize > 0 ? dotSize : (minWidth + maxWidth) / 2;
circle.setAttribute('r', size.toString());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
circle.setAttribute('fill', penColor);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var header = '<svg' +
const prefix = 'data:image/svg+xml;base64,';
const header = '<svg' +
' xmlns="http://www.w3.org/2000/svg"' +
' xmlns:xlink="http://www.w3.org/1999/xlink"' +
(" viewBox=\"" + minX + " " + minY + " " + maxX + " " + maxY + "\"") +
(" width=\"" + maxX + "\"") +
(" height=\"" + maxY + "\"") +
` viewBox="${minX} ${minY} ${this.canvas.width} ${this.canvas.height}"` +
` width="${maxX}"` +
` height="${maxY}"` +
'>';
var body = svg.innerHTML;
let body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
const dummy = document.createElement('dummy');
const nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
for (let i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));

@@ -542,12 +565,11 @@ }

}
var footer = '</svg>';
var data = header + body + footer;
const footer = '</svg>';
const data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
}
}
return SignaturePad;
})));
}));
//# sourceMappingURL=signature_pad.umd.js.map

61

package.json
{
"name": "signature_pad",
"description": "Library for drawing smooth signatures.",
"version": "3.0.0-beta.4",
"version": "4.0.0",
"homepage": "https://github.com/szimek/signature_pad",

@@ -19,5 +19,5 @@ "author": {

"clean": "yarn run del dist",
"emit-types": "mkdir -p dist/types && yarn run tsc src/signature_pad.ts --lib DOM,ES2015 --declaration --declarationDir dist/types --emitDeclarationOnly",
"format": "prettier --write '{src,tests}/**/*.{js,ts}'",
"lint": "eslint '{src,tests}/**/*.ts'",
"emit-types": "yarn run del dist/types && yarn run tsc src/signature_pad.ts --lib DOM,ES2015 --declaration --declarationDir dist/types --emitDeclarationOnly",
"format": "prettier --write {src,tests}/**/*.{js,ts}",
"lint": "eslint {src,tests}/**/*.ts",
"prepublishOnly": "yarn run build",

@@ -27,3 +27,4 @@ "serve": "serve -l 9000 docs",

"test": "jest --coverage",
"update-docs": "cp dist/signature_pad.umd.js docs/js/"
"update-docs": "yarn run cp-cli dist/signature_pad.umd.js docs/js/signature_pad.umd.js",
"prepare": "husky install"
},

@@ -40,33 +41,26 @@ "repository": {

"devDependencies": {
"@rollup/plugin-typescript": "^6.0.0",
"@types/jest": "^26.0.14",
"@types/node": "^14.11.1",
"@typescript-eslint/eslint-plugin": "^4.1.1",
"@typescript-eslint/parser": "^4.1.1",
"canvas": "^2.6.1",
"del": "^5.1.0",
"del-cli": "^3.0.1",
"eslint": "^7.9.0",
"eslint-config-prettier": "^6.11.0",
"husky": "^4.3.0",
"jest": "^26.4.2",
"lint-staged": "^10.4.0",
"prettier": "^2.1.2",
"rollup": "^2.27.1",
"@rollup/plugin-typescript": "^8.3.0",
"@types/jest": "^27.0.3",
"@types/node": "^16.11.9",
"@typescript-eslint/eslint-plugin": "^5.4.0",
"@typescript-eslint/parser": "^5.4.0",
"canvas": "^2.8.0",
"cp-cli": "^2.0.0",
"del": "^6.0.0",
"del-cli": "^4.0.1",
"eslint": "^8.3.0",
"eslint-config-prettier": "^8.3.0",
"husky": "^7.0.4",
"jest": "^27.3.1",
"lint-staged": "^12.1.2",
"prettier": "^2.4.1",
"rollup": "^2.60.1",
"rollup-plugin-terser": "^7.0.2",
"serve": "^11.3.2",
"ts-jest": "^26.3.0",
"tslib": "^2.0.1",
"typescript": "^4.0.3"
"serve": "^13.0.2",
"ts-jest": "^27.0.7",
"tslib": "^2.3.1",
"typescript": "^4.5.2"
},
"husky": {
"hooks": {
"pre-commit": "lint-staged"
}
},
"lint-staged": {
"*.ts": [
"yarn run prettier",
"yarn run lint"
]
"*.ts": "prettier --write"
},

@@ -78,2 +72,3 @@ "jest": {

],
"testEnvironment": "jsdom",
"testEnvironmentOptions": {

@@ -80,0 +75,0 @@ "resources": "usable"

45

README.md
# Signature Pad [![npm](https://badge.fury.io/js/signature_pad.svg)](https://www.npmjs.com/package/signature_pad) [![Build Status](https://travis-ci.org/szimek/signature_pad.svg?branch=master)](https://travis-ci.org/szimek/signature_pad) [![Code Climate](https://codeclimate.com/github/szimek/signature_pad.png)](https://codeclimate.com/github/szimek/signature_pad)
Signature Pad is a JavaScript library for drawing smooth signatures. It's HTML5 canvas based and uses variable width Bézier curve interpolation based on [Smoother Signatures](http://corner.squareup.com/2012/07/smoother-signatures.html) post by [Square](https://squareup.com).
Signature Pad is a JavaScript library for drawing smooth signatures. It's HTML5 canvas based and uses variable width Bézier curve interpolation based on [Smoother Signatures](https://developer.squareup.com/blog/smoother-signatures/) post by [Square](https://squareup.com).
It works in all modern desktop and mobile browsers and doesn't depend on any external libraries.

@@ -8,2 +8,7 @@

## Looking for a maintainer
I wrote this library as it solved a problem I had at the time. Unfortunately, I no longer have time or motivation to work on this library anymore.
Please reach out to me if you'd like to help out and eventually maintain this project.
## Demo

@@ -37,5 +42,5 @@ [Demo](http://szimek.github.io/signature_pad) works in desktop and mobile browsers. You can check out its [source code](https://github.com/szimek/signature_pad/blob/gh-pages/js/app.js) for some tips on how to handle window resize and high DPI screens. You can also find more about the latter in [HTML5 Rocks tutorial](http://www.html5rocks.com/en/tutorials/canvas/hidpi).

``` javascript
var canvas = document.querySelector("canvas");
const canvas = document.querySelector("canvas");
var signaturePad = new SignaturePad(canvas);
const signaturePad = new SignaturePad(canvas);

@@ -57,2 +62,5 @@ // Returns signature image as data URL (see https://mdn.io/todataurl for the list of possible parameters)

// Draws signature image from an array of point groups, without clearing your existing image (clear defaults to true if not provided)
signaturePad.fromData(data, { clear: false });
// Clears the canvas

@@ -89,6 +97,2 @@ signaturePad.clear();

<dd>(float) Weight used to modify new velocity based on the previous velocity. Defaults to <code>0.7</code>.</dd>
<dt>onBegin</dt>
<dd>(function) Callback when stroke begin.</dd>
<dt>onEnd</dt>
<dd>(function) Callback when stroke end.</dd>
</dl>

@@ -98,3 +102,3 @@

```javascript
var signaturePad = new SignaturePad(canvas, {
const signaturePad = new SignaturePad(canvas, {
minWidth: 5,

@@ -107,3 +111,3 @@ maxWidth: 10,

```javascript
var signaturePad = new SignaturePad(canvas);
const signaturePad = new SignaturePad(canvas);
signaturePad.minWidth = 5;

@@ -114,3 +118,22 @@ signaturePad.maxWidth = 10;

### Events
<dl>
<dt>beginStroke</dt>
<dd>Triggered before stroke begins.</dd>
<dt>endStroke</dt>
<dd>Triggered after stroke ends.</dd>
<dt>beforeUpdateStroke</dt>
<dd>Triggered before stroke update.</dd>
<dt>afterUpdateStroke</dt>
<dd>Triggered after stroke update.</dd>
</dl>
You can add listeners to events with [`.addEventListener`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener):
```javascript
const signaturePad = new SignaturePad(canvas);
signaturePad.addEventListener("beginStroke", () => {
console.log("Signature started");
}, { once: true });
```
### Tips and tricks

@@ -121,3 +144,3 @@ #### Handling high DPI screens

function resizeCanvas() {
var ratio = Math.max(window.devicePixelRatio || 1, 1);
const ratio = Math.max(window.devicePixelRatio || 1, 1);
canvas.width = canvas.offsetWidth * ratio;

@@ -175,3 +198,3 @@ canvas.height = canvas.offsetHeight * ratio;

var dataUri = "data:image/png;base64,iVBORw0K...";
var encodedImage = dataUri.Split(",")[1];
var encodedImage = dataUri.Split(',')[1];
var decodedImage = Convert.FromBase64String(encodedImage);

@@ -178,0 +201,0 @@ System.IO.File.WriteAllBytes("signature.png", decodedImage);

19

src/point.ts

@@ -5,2 +5,3 @@ // Interface for point data structure used e.g. in SignaturePad#fromData method

y: number;
pressure: number;
time: number;

@@ -10,5 +11,14 @@ }

export class Point implements BasicPoint {
public x: number;
public y: number;
public pressure: number;
public time: number;
constructor(public x: number, public y: number, time?: number) {
constructor(x: number, y: number, pressure?: number, time?: number) {
if (isNaN(x) || isNaN(y)) {
throw new Error(`Point is invalid: (${x}, ${y})`);
}
this.x = +x;
this.y = +y;
this.pressure = pressure || 0;
this.time = time || Date.now();

@@ -24,3 +34,8 @@ }

public equals(other: BasicPoint): boolean {
return this.x === other.x && this.y === other.y && this.time === other.time;
return (
this.x === other.x &&
this.y === other.y &&
this.pressure === other.pressure &&
this.time === other.time
);
}

@@ -27,0 +42,0 @@

296

src/signature_pad.ts

@@ -6,3 +6,3 @@ /**

* Implementation of interpolation using cubic Bézier curves is taken from:
* http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
* https://web.archive.org/web/20160323213433/http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
*

@@ -19,36 +19,40 @@ * Algorithm for approximated length of a Bézier curve is taken from:

interface CSSStyleDeclaration {
msTouchAction: string;
msTouchAction: string | null;
}
}
export interface Options {
dotSize?: number | (() => number);
minWidth?: number;
maxWidth?: number;
export type SignatureEvent = MouseEvent | Touch | PointerEvent;
export interface FromDataOptions {
clear?: boolean;
}
export interface PointGroupOptions {
dotSize: number;
minWidth: number;
maxWidth: number;
penColor: string;
}
export interface Options extends Partial<PointGroupOptions> {
minDistance?: number;
velocityFilterWeight?: number;
backgroundColor?: string;
penColor?: string;
throttle?: number;
velocityFilterWeight?: number;
onBegin?: (event: MouseEvent | Touch) => void;
onEnd?: (event: MouseEvent | Touch) => void;
}
export interface PointGroup {
color: string;
export interface PointGroup extends PointGroupOptions {
points: BasicPoint[];
}
export default class SignaturePad {
export default class SignaturePad extends EventTarget {
// Public stuff
public dotSize: number | (() => number);
public dotSize: number;
public minWidth: number;
public maxWidth: number;
public penColor: string;
public minDistance: number;
public velocityFilterWeight: number;
public backgroundColor: string;
public penColor: string;
public throttle: number;
public velocityFilterWeight: number;
public onBegin?: (event: MouseEvent | Touch) => void;
public onEnd?: (event: MouseEvent | Touch) => void;

@@ -58,3 +62,3 @@ // Private stuff

private _ctx: CanvasRenderingContext2D;
private _mouseButtonDown: boolean;
private _drawningStroke: boolean;
private _isEmpty: boolean;

@@ -65,3 +69,3 @@ private _lastPoints: Point[]; // Stores up to 4 most recent points; used to generate a new curve

private _lastWidth: number;
private _strokeMoveUpdate: (event: MouseEvent | Touch) => void;
private _strokeMoveUpdate: (event: SignatureEvent) => void;
/* tslint:enable: variable-name */

@@ -73,2 +77,3 @@

) {
super();
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;

@@ -78,14 +83,8 @@ this.minWidth = options.minWidth || 0.5;

this.throttle = ('throttle' in options ? options.throttle : 16) as number; // in milisecondss
this.minDistance = ('minDistance' in options
? options.minDistance
: 5) as number; // in pixels
this.dotSize =
options.dotSize ||
function dotSize(this: SignaturePad): number {
return (this.minWidth + this.maxWidth) / 2;
};
this.minDistance = (
'minDistance' in options ? options.minDistance : 5
) as number; // in pixels
this.dotSize = options.dotSize || 0;
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;

@@ -118,26 +117,32 @@ this._strokeMoveUpdate = this.throttle

dataUrl: string,
options: { ratio?: number; width?: number; height?: number } = {},
callback?: (error?: string | Event) => void,
): void {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
options: {
ratio?: number;
width?: number;
height?: number;
xOffset?: number;
yOffset?: number;
} = {},
): Promise<void> {
return new Promise((resolve, reject) => {
const image = new Image();
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
const xOffset = options.xOffset || 0;
const yOffset = options.yOffset || 0;
this._reset();
this._reset();
image.onload = (): void => {
this._ctx.drawImage(image, 0, 0, width, height);
if (callback) {
callback();
}
};
image.onerror = (error): void => {
if (callback) {
callback(error);
}
};
image.src = dataUrl;
image.onload = (): void => {
this._ctx.drawImage(image, xOffset, yOffset, width, height);
resolve();
};
image.onerror = (error): void => {
reject(error);
};
image.crossOrigin = 'anonymous';
image.src = dataUrl;
this._isEmpty = false;
this._isEmpty = false;
});
}

@@ -175,5 +180,5 @@

this.canvas.removeEventListener('pointerdown', this._handleMouseDown);
this.canvas.removeEventListener('pointermove', this._handleMouseMove);
document.removeEventListener('pointerup', this._handleMouseUp);
this.canvas.removeEventListener('pointerdown', this._handlePointerStart);
this.canvas.removeEventListener('pointermove', this._handlePointerMove);
document.removeEventListener('pointerup', this._handlePointerEnd);

@@ -193,12 +198,17 @@ this.canvas.removeEventListener('mousedown', this._handleMouseDown);

public fromData(pointGroups: PointGroup[]): void {
this.clear();
public fromData(
pointGroups: PointGroup[],
{ clear = true }: FromDataOptions = {},
): void {
if (clear) {
this.clear();
}
this._fromData(
pointGroups,
({ color, curve }) => this._drawCurve({ color, curve }),
({ color, point }) => this._drawDot({ color, point }),
this._drawCurve.bind(this),
this._drawDot.bind(this),
);
this._data = pointGroups;
this._data = clear ? pointGroups : this._data.concat(pointGroups);
}

@@ -212,4 +222,4 @@

private _handleMouseDown = (event: MouseEvent): void => {
if (event.which === 1) {
this._mouseButtonDown = true;
if (event.buttons === 1) {
this._drawningStroke = true;
this._strokeBegin(event);

@@ -220,3 +230,3 @@ }

private _handleMouseMove = (event: MouseEvent): void => {
if (this._mouseButtonDown) {
if (this._drawningStroke) {
this._strokeMoveUpdate(event);

@@ -227,4 +237,4 @@ }

private _handleMouseUp = (event: MouseEvent): void => {
if (event.which === 1 && this._mouseButtonDown) {
this._mouseButtonDown = false;
if (event.buttons === 1 && this._drawningStroke) {
this._drawningStroke = false;
this._strokeEnd(event);

@@ -262,13 +272,36 @@ }

private _handlePointerStart = (event: PointerEvent): void => {
this._drawningStroke = true;
event.preventDefault();
this._strokeBegin(event);
};
private _handlePointerMove = (event: PointerEvent): void => {
if (this._drawningStroke) {
event.preventDefault();
this._strokeMoveUpdate(event);
}
};
private _handlePointerEnd = (event: PointerEvent): void => {
this._drawningStroke = false;
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
this._strokeEnd(event);
}
};
// Private methods
private _strokeBegin(event: MouseEvent | Touch): void {
const newPointGroup = {
color: this.penColor,
private _strokeBegin(event: SignatureEvent): void {
this.dispatchEvent(new CustomEvent('beginStroke', { detail: event }));
const newPointGroup: PointGroup = {
dotSize: this.dotSize,
minWidth: this.minWidth,
maxWidth: this.maxWidth,
penColor: this.penColor,
points: [],
};
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);

@@ -279,3 +312,3 @@ this._reset();

private _strokeUpdate(event: MouseEvent | Touch): void {
private _strokeUpdate(event: SignatureEvent): void {
if (this._data.length === 0) {

@@ -288,6 +321,16 @@ // This can happen if clear() was called while a signature is still in progress,

this.dispatchEvent(
new CustomEvent('beforeUpdateStroke', { detail: event }),
);
const x = event.clientX;
const y = event.clientY;
const pressure =
(event as PointerEvent).pressure !== undefined
? (event as PointerEvent).pressure
: (event as Touch).force !== undefined
? (event as Touch).force
: 0;
const point = this._createPoint(x, y);
const point = this._createPoint(x, y, pressure);
const lastPointGroup = this._data[this._data.length - 1];

@@ -300,3 +343,3 @@ const lastPoints = lastPointGroup.points;

: false;
const color = lastPointGroup.color;
const { penColor, dotSize, minWidth, maxWidth } = lastPointGroup;

@@ -308,5 +351,15 @@ // Skip this point if it's too close to the previous one

if (!lastPoint) {
this._drawDot({ color, point });
this._drawDot(point, {
penColor,
dotSize,
minWidth,
maxWidth,
});
} else if (curve) {
this._drawCurve({ color, curve });
this._drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -318,24 +371,25 @@

y: point.y,
pressure: point.pressure,
});
}
this.dispatchEvent(new CustomEvent('afterUpdateStroke', { detail: event }));
}
private _strokeEnd(event: MouseEvent | Touch): void {
private _strokeEnd(event: SignatureEvent): void {
this._strokeUpdate(event);
if (typeof this.onEnd === 'function') {
this.onEnd(event);
}
this.dispatchEvent(new CustomEvent('endStroke', { detail: event }));
}
private _handlePointerEvents(): void {
this._mouseButtonDown = false;
this._drawningStroke = false;
this.canvas.addEventListener('pointerdown', this._handleMouseDown);
this.canvas.addEventListener('pointermove', this._handleMouseMove);
document.addEventListener('pointerup', this._handleMouseUp);
this.canvas.addEventListener('pointerdown', this._handlePointerStart);
this.canvas.addEventListener('pointermove', this._handlePointerMove);
document.addEventListener('pointerup', this._handlePointerEnd);
}
private _handleMouseEvents(): void {
this._mouseButtonDown = false;
this._drawningStroke = false;

@@ -361,6 +415,11 @@ this.canvas.addEventListener('mousedown', this._handleMouseDown);

private _createPoint(x: number, y: number): Point {
private _createPoint(x: number, y: number, pressure: number): Point {
const rect = this.canvas.getBoundingClientRect();
return new Point(x - rect.left, y - rect.top, new Date().getTime());
return new Point(
x - rect.left,
y - rect.top,
pressure,
new Date().getTime(),
);
}

@@ -427,3 +486,3 @@

private _drawCurve({ color, curve }: { color: string; curve: Bezier }): void {
private _drawCurve(curve: Bezier, options: PointGroupOptions): void {
const ctx = this._ctx;

@@ -433,6 +492,6 @@ const widthDelta = curve.endWidth - curve.startWidth;

// there are gaps between curve segments :/
const drawSteps = Math.floor(curve.length()) * 2;
const drawSteps = Math.ceil(curve.length()) * 2;
ctx.beginPath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;

@@ -460,3 +519,3 @@ for (let i = 0; i < drawSteps; i += 1) {

curve.startWidth + ttt * widthDelta,
this.maxWidth,
options.maxWidth,
);

@@ -470,12 +529,8 @@ this._drawCurveSegment(x, y, width);

private _drawDot({
color,
point,
}: {
color: string;
point: BasicPoint;
}): void {
private _drawDot(point: BasicPoint, options: PointGroupOptions): void {
const ctx = this._ctx;
const width =
typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
options.dotSize > 0
? options.dotSize
: (options.minWidth + options.maxWidth) / 2;

@@ -485,3 +540,3 @@ ctx.beginPath();

ctx.closePath();
ctx.fillStyle = color;
ctx.fillStyle = options.penColor;
ctx.fill();

@@ -496,3 +551,3 @@ }

for (const group of pointGroups) {
const { color, points } = group;
const { penColor, dotSize, minWidth, maxWidth, points } = group;

@@ -502,7 +557,12 @@ if (points.length > 1) {

const basicPoint = points[j];
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.time);
const point = new Point(
basicPoint.x,
basicPoint.y,
basicPoint.pressure,
basicPoint.time,
);
// All points in the group have the same color, so it's enough to set
// penColor just at the beginning.
this.penColor = color;
this.penColor = penColor;

@@ -516,3 +576,8 @@ if (j === 0) {

if (curve) {
drawCurve({ color, curve });
drawCurve(curve, {
penColor,
dotSize,
minWidth,
maxWidth,
});
}

@@ -523,5 +588,7 @@ }

drawDot({
color,
point: points[0],
drawDot(points[0], {
penColor,
dotSize,
minWidth,
maxWidth,
});

@@ -547,3 +614,3 @@ }

({ color, curve }: { color: string; curve: Bezier }) => {
(curve, { penColor }) => {
const path = document.createElement('path');

@@ -570,3 +637,3 @@

path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('stroke', penColor);
path.setAttribute('fill', 'none');

@@ -580,10 +647,9 @@ path.setAttribute('stroke-linecap', 'round');

({ color, point }: { color: string; point: BasicPoint }) => {
(point, { penColor, dotSize, minWidth, maxWidth }) => {
const circle = document.createElement('circle');
const dotSize =
typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
circle.setAttribute('r', dotSize.toString());
const size = dotSize > 0 ? dotSize : (minWidth + maxWidth) / 2;
circle.setAttribute('r', size.toString());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
circle.setAttribute('fill', penColor);

@@ -599,3 +665,3 @@ svg.appendChild(circle);

' xmlns:xlink="http://www.w3.org/1999/xlink"' +
` viewBox="${minX} ${minY} ${maxX} ${maxY}"` +
` viewBox="${minX} ${minY} ${this.canvas.width} ${this.canvas.height}"` +
` width="${maxX}"` +

@@ -602,0 +668,0 @@ ` height="${maxY}"` +

CHANGELOG.md
dist/signature_pad.js.map

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dist/signature_pad.min.js.map

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dist/signature_pad.umd.js.map

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dist/signature_pad.umd.min.js.map

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