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signature_pad

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signature_pad - npm Package Compare versions

Comparing version 3.0.0-beta.3 to 3.0.0-beta.4

dist/signature_pad.js.map
dist/signature_pad.min.js.map
dist/signature_pad.umd.js.map
dist/signature_pad.umd.min.js.map

11

CHANGELOG.md
## Changelog
### master
### 3.0.0-beta.4
#### Bug fixes
- Fix race condition / edge case in _strokeUpdate. ([ndbroadbent](https://github.com/ndbroadbent); fixes [#480](https://github.com/szimek/signature_pad/issues/480))
#### Breaking changes
- Remove CommonJS build
- Updated development dependencies (TS 4.x; tslint -> eslint)
### 3.0.0-beta.3

@@ -31,3 +40,3 @@ #### Features

#### Bug Fixes
- Allow scrolling via touch after calling `SignaturePad#off`([felixhammerl](https://github.com/felixhammerl) and [patrickbussmann](https://github.com/patrickbussmann)).
- Allow scrolling via touch after calling `SignaturePad#off` ([felixhammerl](https://github.com/felixhammerl) and [patrickbussmann](https://github.com/patrickbussmann)).

@@ -34,0 +43,0 @@ #### Features

503

dist/signature_pad.js
/*!
* Signature Pad v3.0.0-beta.3 | https://github.com/szimek/signature_pad
* (c) 2018 Szymon Nowak | Released under the MIT license
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
*/
'use strict';
var Point = (function () {
function Point(x, y, time) {
class Point {
constructor(x, y, time) {
this.x = x;

@@ -14,16 +12,17 @@ this.y = y;

}
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) {
}
equals(other) {
return this.x === other.x && this.y === other.y && this.time === other.time;
};
Point.prototype.velocityFrom = function (start) {
return (this.time !== start.time) ? this.distanceTo(start) / (this.time - start.time) : 0;
};
return Point;
}());
}
velocityFrom(start) {
return this.time !== start.time
? this.distanceTo(start) / (this.time - start.time)
: 0;
}
}
var Bezier = (function () {
function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
class Bezier {
constructor(startPoint, control2, control1, endPoint, startWidth, endWidth) {
this.startPoint = startPoint;

@@ -36,40 +35,40 @@ 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;
length += Math.sqrt((xdiff * xdiff) + (ydiff * ydiff));
const xdiff = cx - px;
const ydiff = cy - py;
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
}

@@ -80,4 +79,4 @@ px = cx;

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))

@@ -87,14 +86,12 @@ + (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();

@@ -108,9 +105,5 @@ timeout = null;

};
return function () {
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;

@@ -137,43 +130,41 @@ storedArgs = args;

var SignaturePad = (function () {
function SignaturePad(canvas, options) {
if (options === void 0) { options = {}; }
var _this = this;
class SignaturePad {
constructor(canvas, options = {}) {
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
this._handleMouseDown = (event) => {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
this._mouseButtonDown = true;
this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
this._handleMouseMove = (event) => {
if (this._mouseButtonDown) {
this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
this._handleMouseUp = (event) => {
if (event.which === 1 && this._mouseButtonDown) {
this._mouseButtonDown = 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);
}

@@ -185,12 +176,10 @@ };

this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
if (this.throttle) {
this._strokeMoveUpdate = throttle(SignaturePad.prototype._strokeUpdate, this.throttle);
}
else {
this._strokeMoveUpdate = SignaturePad.prototype._strokeUpdate;
}
this.dotSize = options.dotSize || function () {
return (this.minWidth + this.maxWidth) / 2;
};
this.minDistance = ('minDistance' in options
? options.minDistance
: 5);
this.dotSize =
options.dotSize ||
function dotSize() {
return (this.minWidth + this.maxWidth) / 2;
};
this.penColor = options.penColor || 'black';

@@ -200,2 +189,5 @@ this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';

this.onEnd = options.onEnd;
this._strokeMoveUpdate = this.throttle
? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)
: SignaturePad.prototype._strokeUpdate;
this._ctx = canvas.getContext('2d');

@@ -205,5 +197,4 @@ this.clear();

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

@@ -215,13 +206,11 @@ 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);
}
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 = function () {
_this._ctx.drawImage(image, 0, 0, width, height);
image.onload = () => {
this._ctx.drawImage(image, 0, 0, width, height);
if (callback) {

@@ -231,3 +220,3 @@ callback();

};
image.onerror = function (error) {
image.onerror = (error) => {
if (callback) {

@@ -239,5 +228,4 @@ callback(error);

this._isEmpty = false;
};
SignaturePad.prototype.toDataURL = function (type, encoderOptions) {
if (type === void 0) { type = 'image/png'; }
}
toDataURL(type = 'image/png', encoderOptions) {
switch (type) {

@@ -249,4 +237,4 @@ case 'image/svg+xml':

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

@@ -263,4 +251,4 @@ this.canvas.style.msTouchAction = 'none';

}
};
SignaturePad.prototype.off = function () {
}
off() {
this.canvas.style.touchAction = 'auto';

@@ -277,49 +265,48 @@ this.canvas.style.msTouchAction = 'auto';

this.canvas.removeEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype.isEmpty = function () {
}
isEmpty() {
return this._isEmpty;
};
SignaturePad.prototype.fromData = function (pointGroups) {
var _this = this;
}
fromData(pointGroups) {
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._fromData(pointGroups, ({ color, curve }) => this._drawCurve({ color, curve }), ({ color, point }) => this._drawDot({ color, point }));
this._data = pointGroups;
};
SignaturePad.prototype.toData = function () {
}
toData() {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
}
_strokeBegin(event) {
const newPointGroup = {
color: this.penColor,
points: []
points: [],
};
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
_strokeUpdate(event) {
if (this._data.length === 0) {
this._strokeBegin(event);
return;
}
};
SignaturePad.prototype._strokeUpdate = function (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 ? point.distanceTo(lastPoint) <= this.minDistance : false;
var color = lastPointGroup.color;
const x = event.clientX;
const y = event.clientY;
const point = this._createPoint(x, y);
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;
const color = lastPointGroup.color;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
this._drawDot({ color, point });
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
this._drawCurve({ color, curve });
}

@@ -329,7 +316,7 @@ lastPoints.push({

x: point.x,
y: point.y
y: point.y,
});
}
};
SignaturePad.prototype._strokeEnd = function (event) {
}
_strokeEnd(event) {
this._strokeUpdate(event);

@@ -339,4 +326,4 @@ if (typeof this.onEnd === 'function') {

}
};
SignaturePad.prototype._handlePointerEvents = function () {
}
_handlePointerEvents() {
this._mouseButtonDown = false;

@@ -346,4 +333,4 @@ this.canvas.addEventListener('pointerdown', this._handleMouseDown);

document.addEventListener('pointerup', this._handleMouseUp);
};
SignaturePad.prototype._handleMouseEvents = function () {
}
_handleMouseEvents() {
this._mouseButtonDown = false;

@@ -353,9 +340,9 @@ this.canvas.addEventListener('mousedown', this._handleMouseDown);

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 = [];

@@ -365,9 +352,9 @@ this._lastVelocity = 0;

this._ctx.fillStyle = this.penColor;
};
SignaturePad.prototype._createPoint = function (x, y) {
var rect = this.canvas.getBoundingClientRect();
}
_createPoint(x, y) {
const 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;
}
_addPoint(point) {
const { _lastPoints } = this;
_lastPoints.push(point);

@@ -378,4 +365,4 @@ 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();

@@ -385,10 +372,10 @@ return curve;

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

@@ -398,35 +385,34 @@ 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({ color, curve }) {
const ctx = this._ctx;
const widthDelta = curve.endWidth - curve.startWidth;
const drawSteps = Math.floor(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;
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 = curve.startWidth + (ttt * widthDelta);
const width = Math.min(curve.startWidth + ttt * widthDelta, this.maxWidth);
this._drawCurveSegment(x, y, width);

@@ -436,7 +422,6 @@ }

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({ color, point, }) {
const ctx = this._ctx;
const width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
ctx.beginPath();

@@ -447,11 +432,10 @@ this._drawCurveSegment(point.x, point.y, width);

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 { color, 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);
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;

@@ -461,5 +445,5 @@ if (j === 0) {

}
var curve = this._addPoint(point);
const curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
drawCurve({ color, curve });
}

@@ -471,22 +455,20 @@ }

drawDot({
color: color,
point: points[0]
color,
point: points[0],
});
}
}
};
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, ({ color, curve }) => {
const path = document.createElement('path');
if (!isNaN(curve.control1.x) &&

@@ -496,6 +478,6 @@ !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);

@@ -508,6 +490,5 @@ path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));

}
}, function (_a) {
var color = _a.color, point = _a.point;
var circle = document.createElement('circle');
var dotSize = typeof _this.dotSize === 'function' ? _this.dotSize() : _this.dotSize;
}, ({ color, point }) => {
const circle = document.createElement('circle');
const dotSize = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
circle.setAttribute('r', dotSize.toString());

@@ -519,16 +500,16 @@ circle.setAttribute('cx', point.x.toString());

});
var prefix = 'data:image/svg+xml;base64,';
var 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 + "\"")
+ '>';
var body = svg.innerHTML;
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}"` +
'>';
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));

@@ -538,9 +519,9 @@ }

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

7

dist/signature_pad.min.js

@@ -1,1 +0,6 @@

"use strict";var Point=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}(),Bezier=function(){function t(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 t.fromPoints=function(e,o){var i=this.calculateControlPoints(e[0],e[1],e[2]).c2,n=this.calculateControlPoints(e[1],e[2],e[3]).c1;return new t(e[1],i,n,e[2],o.start,o.end)},t.calculateControlPoints=function(t,e,o){var i=t.x-e.x,n=t.y-e.y,s=e.x-o.x,r=e.y-o.y,h=(t.x+e.x)/2,a=(t.y+e.y)/2,c=(e.x+o.x)/2,u=(e.y+o.y)/2,d=Math.sqrt(i*i+n*n),l=Math.sqrt(s*s+r*r),v=l/(d+l),p=c+(h-c)*v,_=u+(a-u)*v,f=e.x-p,m=e.y-_;return{c1:new Point(h+f,a+m),c2:new Point(c+f,u+m)}},t.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},t.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},t}();function throttle(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}}var SignaturePad=function(){function t(e,o){void 0===o&&(o={});var i=this;this.canvas=e,this.options=o,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=o.velocityFilterWeight||.7,this.minWidth=o.minWidth||.5,this.maxWidth=o.maxWidth||2.5,this.throttle="throttle"in o?o.throttle:16,this.minDistance="minDistance"in o?o.minDistance:5,this.throttle?this._strokeMoveUpdate=throttle(t.prototype._strokeUpdate,this.throttle):this._strokeMoveUpdate=t.prototype._strokeUpdate,this.dotSize=o.dotSize||function(){return(this.minWidth+this.maxWidth)/2},this.penColor=o.penColor||"black",this.backgroundColor=o.backgroundColor||"rgba(0,0,0,0)",this.onBegin=o.onBegin,this.onEnd=o.onEnd,this._ctx=e.getContext("2d"),this.clear(),this.on()}return t.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},t.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},t.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)}},t.prototype.on=function(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),"ontouchstart"in window&&this._handleTouchEvents())},t.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)},t.prototype.isEmpty=function(){return this._isEmpty},t.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},t.prototype.toData=function(){return this._data},t.prototype._strokeBegin=function(t){var e={color:this.penColor,points:[]};this._data.push(e),this._reset(),this._strokeUpdate(t),"function"==typeof this.onBegin&&this.onBegin(t)},t.prototype._strokeUpdate=function(t){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})}},t.prototype._strokeEnd=function(t){this._strokeUpdate(t),"function"==typeof this.onEnd&&this.onEnd(t)},t.prototype._handlePointerEvents=function(){this._mouseButtonDown=!1,this.canvas.addEventListener("pointerdown",this._handleMouseDown),this.canvas.addEventListener("pointermove",this._handleMouseMove),document.addEventListener("pointerup",this._handleMouseUp)},t.prototype._handleMouseEvents=function(){this._mouseButtonDown=!1,this.canvas.addEventListener("mousedown",this._handleMouseDown),this.canvas.addEventListener("mousemove",this._handleMouseMove),document.addEventListener("mouseup",this._handleMouseUp)},t.prototype._handleTouchEvents=function(){this.canvas.addEventListener("touchstart",this._handleTouchStart),this.canvas.addEventListener("touchmove",this._handleTouchMove),this.canvas.addEventListener("touchend",this._handleTouchEnd)},t.prototype._reset=function(){this._lastPoints=[],this._lastVelocity=0,this._lastWidth=(this.minWidth+this.maxWidth)/2,this._ctx.fillStyle=this.penColor},t.prototype._createPoint=function(t,e){var o=this.canvas.getBoundingClientRect();return new Point(t-o.left,e-o.top,(new Date).getTime())},t.prototype._addPoint=function(t){var e=this._lastPoints;if(e.push(t),e.length>2){3===e.length&&e.unshift(e[0]);var o=this._calculateCurveWidths(e[1],e[2]),i=Bezier.fromPoints(e,o);return e.shift(),i}return null},t.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},t.prototype._strokeWidth=function(t){return Math.max(this.maxWidth/(t+1),this.minWidth)},t.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},t.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 _=o.startWidth+c*n;this._drawCurveSegment(v,p,_)}i.closePath(),i.fill()},t.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()},t.prototype._fromData=function(t,e,o){for(var i=0,n=t;i<n.length;i++){var s=n[i],r=s.color,h=s.points;if(h.length>1)for(var a=0;a<h.length;a+=1){var c=h[a],u=new Point(c.x,c.y,c.time);this.penColor=r,0===a&&this._reset();var d=this._addPoint(u);d&&e({color:r,curve:d})}else this._reset(),o({color:r,point:h[0]})}},t.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>")},t}();module.exports=SignaturePad;
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 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;
//# sourceMappingURL=signature_pad.min.js.map

1027

dist/signature_pad.umd.js
/*!
* Signature Pad v3.0.0-beta.3 | https://github.com/szimek/signature_pad
* (c) 2018 Szymon Nowak | Released under the MIT license
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.SignaturePad = factory());
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.SignaturePad = factory());
}(this, (function () { 'use strict';
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (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) {
return (this.time !== start.time) ? this.distanceTo(start) / (this.time - start.time) : 0;
};
return Point;
}());
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (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) {
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) {
this.startPoint = startPoint;
this.control2 = control2;
this.control1 = control1;
this.endPoint = endPoint;
this.startWidth = startWidth;
this.endWidth = endWidth;
}
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;
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;
return {
c1: new Point(m1.x + tx, m1.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);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
length += Math.sqrt((xdiff * xdiff) + (ydiff * ydiff));
}
px = cx;
py = cy;
}
return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ (3.0 * c2 * (1.0 - t) * t * t)
+ (end * t * t * t);
};
return Bezier;
}());
var Bezier = (function () {
function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
this.startPoint = startPoint;
this.control2 = control2;
this.control1 = control1;
this.endPoint = endPoint;
this.startWidth = startWidth;
this.endWidth = endWidth;
}
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;
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;
return {
c1: new Point(m1.x + tx, m1.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);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
}
px = cx;
py = cy;
}
return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ (3.0 * c2 * (1.0 - t) * 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 () {
previous = Date.now();
timeout = null;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
};
return function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var now = Date.now();
var remaining = wait - (now - previous);
storedContext = this;
storedArgs = args;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
}
else if (!timeout) {
timeout = window.setTimeout(later, remaining);
}
return result;
};
}
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 () {
previous = Date.now();
timeout = null;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
};
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);
storedContext = this;
storedArgs = args;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
}
else if (!timeout) {
timeout = window.setTimeout(later, remaining);
}
return result;
};
}
var SignaturePad = (function () {
function SignaturePad(canvas, options) {
if (options === void 0) { options = {}; }
var _this = this;
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
this.minWidth = options.minWidth || 0.5;
this.maxWidth = options.maxWidth || 2.5;
this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
if (this.throttle) {
this._strokeMoveUpdate = throttle(SignaturePad.prototype._strokeUpdate, this.throttle);
}
else {
this._strokeMoveUpdate = SignaturePad.prototype._strokeUpdate;
}
this.dotSize = options.dotSize || function () {
return (this.minWidth + this.maxWidth) / 2;
};
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._ctx = canvas.getContext('2d');
this.clear();
this.on();
}
SignaturePad.prototype.clear = function () {
var ctx = this._ctx;
var canvas = this.canvas;
ctx.fillStyle = this.backgroundColor;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.fillRect(0, 0, canvas.width, canvas.height);
this._data = [];
this._reset();
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'; }
switch (type) {
case 'image/svg+xml':
return this._toSVG();
default:
return this.canvas.toDataURL(type, encoderOptions);
}
};
SignaturePad.prototype.on = function () {
this.canvas.style.touchAction = 'none';
this.canvas.style.msTouchAction = 'none';
if (window.PointerEvent) {
this._handlePointerEvents();
}
else {
this._handleMouseEvents();
if ('ontouchstart' in window) {
this._handleTouchEvents();
}
}
};
SignaturePad.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);
};
SignaturePad.prototype.isEmpty = function () {
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 () {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: this.penColor,
points: []
};
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
};
SignaturePad.prototype._strokeUpdate = function (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 ? point.distanceTo(lastPoint) <= this.minDistance : false;
var color = lastPointGroup.color;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
}
lastPoints.push({
time: point.time,
x: point.x,
y: point.y
});
}
};
SignaturePad.prototype._strokeEnd = function (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.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
this._lastPoints = [];
this._lastVelocity = 0;
this._lastWidth = (this.minWidth + this.maxWidth) / 2;
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;
_lastPoints.push(point);
if (_lastPoints.length > 2) {
if (_lastPoints.length === 3) {
_lastPoints.unshift(_lastPoints[0]);
}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();
return curve;
}
return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = (this.velocityFilterWeight * endPoint.velocityFrom(startPoint))
+ ((1 - this.velocityFilterWeight) * this._lastVelocity);
var newWidth = this._strokeWidth(velocity);
var widths = {
end: newWidth,
start: this._lastWidth
};
this._lastVelocity = velocity;
this._lastWidth = newWidth;
return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var 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;
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;
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;
y += 3 * uu * t * curve.control1.y;
y += 3 * u * tt * curve.control2.y;
y += ttt * curve.endPoint.y;
var width = curve.startWidth + (ttt * widthDelta);
this._drawCurveSegment(x, y, width);
}
ctx.closePath();
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;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
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;
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;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
}
}
}
else {
this._reset();
drawDot({
color: color,
point: points[0]
});
}
}
};
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');
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');
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!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));
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('fill', 'none');
path.setAttribute('stroke-linecap', 'round');
svg.appendChild(path);
}
}, 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());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var 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 + "\"")
+ '>';
var body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));
}
body = dummy.innerHTML;
}
var footer = '</svg>';
var data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
var SignaturePad = (function () {
function SignaturePad(canvas, options) {
var _this = this;
if (options === void 0) { options = {}; }
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
this.minWidth = options.minWidth || 0.5;
this.maxWidth = options.maxWidth || 2.5;
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.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
? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)
: SignaturePad.prototype._strokeUpdate;
this._ctx = canvas.getContext('2d');
this.clear();
this.on();
}
SignaturePad.prototype.clear = function () {
var _a = this, ctx = _a._ctx, canvas = _a.canvas;
ctx.fillStyle = this.backgroundColor;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.fillRect(0, 0, canvas.width, canvas.height);
this._data = [];
this._reset();
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'; }
switch (type) {
case 'image/svg+xml':
return this._toSVG();
default:
return this.canvas.toDataURL(type, encoderOptions);
}
};
SignaturePad.prototype.on = function () {
this.canvas.style.touchAction = 'none';
this.canvas.style.msTouchAction = 'none';
if (window.PointerEvent) {
this._handlePointerEvents();
}
else {
this._handleMouseEvents();
if ('ontouchstart' in window) {
this._handleTouchEvents();
}
}
};
SignaturePad.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);
};
SignaturePad.prototype.isEmpty = function () {
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 () {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: 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) {
if (this._data.length === 0) {
this._strokeBegin(event);
return;
}
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
? point.distanceTo(lastPoint) <= this.minDistance
: false;
var color = lastPointGroup.color;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
}
lastPoints.push({
time: point.time,
x: point.x,
y: point.y
});
}
};
SignaturePad.prototype._strokeEnd = function (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.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
this._lastPoints = [];
this._lastVelocity = 0;
this._lastWidth = (this.minWidth + this.maxWidth) / 2;
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;
_lastPoints.push(point);
if (_lastPoints.length > 2) {
if (_lastPoints.length === 3) {
_lastPoints.unshift(_lastPoints[0]);
}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();
return curve;
}
return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
(1 - this.velocityFilterWeight) * this._lastVelocity;
var newWidth = this._strokeWidth(velocity);
var widths = {
end: newWidth,
start: this._lastWidth
};
this._lastVelocity = velocity;
this._lastWidth = newWidth;
return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var 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;
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;
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;
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);
this._drawCurveSegment(x, y, width);
}
ctx.closePath();
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;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
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;
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;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
}
}
}
else {
this._reset();
drawDot({
color: color,
point: points[0]
});
}
}
};
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');
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');
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!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));
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('fill', 'none');
path.setAttribute('stroke-linecap', 'round');
svg.appendChild(path);
}
}, 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());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var 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 + "\"") +
'>';
var body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));
}
body = dummy.innerHTML;
}
var footer = '</svg>';
var data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
return SignaturePad;
return SignaturePad;
})));
//# sourceMappingURL=signature_pad.umd.js.map

7

dist/signature_pad.umd.min.js

@@ -1,1 +0,6 @@

!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.SignaturePad=e()}(this,function(){"use strict";var t=function(){function t(t,e,o){this.x=t,this.y=e,this.time=o||Date.now()}return t.prototype.distanceTo=function(t){return Math.sqrt(Math.pow(this.x-t.x,2)+Math.pow(this.y-t.y,2))},t.prototype.equals=function(t){return this.x===t.x&&this.y===t.y&&this.time===t.time},t.prototype.velocityFrom=function(t){return this.time!==t.time?this.distanceTo(t)/(this.time-t.time):0},t}(),e=function(){function e(t,e,o,n,i,s){this.startPoint=t,this.control2=e,this.control1=o,this.endPoint=n,this.startWidth=i,this.endWidth=s}return e.fromPoints=function(t,o){var n=this.calculateControlPoints(t[0],t[1],t[2]).c2,i=this.calculateControlPoints(t[1],t[2],t[3]).c1;return new e(t[1],n,i,t[2],o.start,o.end)},e.calculateControlPoints=function(e,o,n){var i=e.x-o.x,s=e.y-o.y,r=o.x-n.x,h=o.y-n.y,a=(e.x+o.x)/2,c=(e.y+o.y)/2,u=(o.x+n.x)/2,d=(o.y+n.y)/2,l=Math.sqrt(i*i+s*s),v=Math.sqrt(r*r+h*h),p=v/(l+v),f=u+(a-u)*p,_=d+(c-d)*p,m=o.x-f,y=o.y-_;return{c1:new t(a+m,c+y),c2:new t(u+m,d+y)}},e.prototype.length=function(){for(var t,e,o=0,n=0;n<=10;n+=1){var i=n/10,s=this.point(i,this.startPoint.x,this.control1.x,this.control2.x,this.endPoint.x),r=this.point(i,this.startPoint.y,this.control1.y,this.control2.y,this.endPoint.y);if(n>0){var h=s-t,a=r-e;o+=Math.sqrt(h*h+a*a)}t=s,e=r}return o},e.prototype.point=function(t,e,o,n,i){return e*(1-t)*(1-t)*(1-t)+3*o*(1-t)*(1-t)*t+3*n*(1-t)*t*t+i*t*t*t},e}();return function(){function o(t,e){void 0===e&&(e={});var n=this;this.canvas=t,this.options=e,this._handleMouseDown=function(t){1===t.which&&(n._mouseButtonDown=!0,n._strokeBegin(t))},this._handleMouseMove=function(t){n._mouseButtonDown&&n._strokeMoveUpdate(t)},this._handleMouseUp=function(t){1===t.which&&n._mouseButtonDown&&(n._mouseButtonDown=!1,n._strokeEnd(t))},this._handleTouchStart=function(t){if(t.preventDefault(),1===t.targetTouches.length){var e=t.changedTouches[0];n._strokeBegin(e)}},this._handleTouchMove=function(t){t.preventDefault();var e=t.targetTouches[0];n._strokeMoveUpdate(e)},this._handleTouchEnd=function(t){if(t.target===n.canvas){t.preventDefault();var e=t.changedTouches[0];n._strokeEnd(e)}},this.velocityFilterWeight=e.velocityFilterWeight||.7,this.minWidth=e.minWidth||.5,this.maxWidth=e.maxWidth||2.5,this.throttle="throttle"in e?e.throttle:16,this.minDistance="minDistance"in e?e.minDistance:5,this.throttle?this._strokeMoveUpdate=function(t,e){void 0===e&&(e=250);var o,n,i,s=0,r=null,h=function(){s=Date.now(),r=null,o=t.apply(n,i),r||(n=null,i=[])};return function(){for(var a=[],c=0;c<arguments.length;c++)a[c]=arguments[c];var u=Date.now(),d=e-(u-s);return n=this,i=a,d<=0||d>e?(r&&(clearTimeout(r),r=null),s=u,o=t.apply(n,i),r||(n=null,i=[])):r||(r=window.setTimeout(h,d)),o}}(o.prototype._strokeUpdate,this.throttle):this._strokeMoveUpdate=o.prototype._strokeUpdate,this.dotSize=e.dotSize||function(){return(this.minWidth+this.maxWidth)/2},this.penColor=e.penColor||"black",this.backgroundColor=e.backgroundColor||"rgba(0,0,0,0)",this.onBegin=e.onBegin,this.onEnd=e.onEnd,this._ctx=t.getContext("2d"),this.clear(),this.on()}return o.prototype.clear=function(){var t=this._ctx,e=this.canvas;t.fillStyle=this.backgroundColor,t.clearRect(0,0,e.width,e.height),t.fillRect(0,0,e.width,e.height),this._data=[],this._reset(),this._isEmpty=!0},o.prototype.fromDataURL=function(t,e,o){var n=this;void 0===e&&(e={});var i=new Image,s=e.ratio||window.devicePixelRatio||1,r=e.width||this.canvas.width/s,h=e.height||this.canvas.height/s;this._reset(),i.onload=function(){n._ctx.drawImage(i,0,0,r,h),o&&o()},i.onerror=function(t){o&&o(t)},i.src=t,this._isEmpty=!1},o.prototype.toDataURL=function(t,e){switch(void 0===t&&(t="image/png"),t){case"image/svg+xml":return this._toSVG();default:return this.canvas.toDataURL(t,e)}},o.prototype.on=function(){this.canvas.style.touchAction="none",this.canvas.style.msTouchAction="none",window.PointerEvent?this._handlePointerEvents():(this._handleMouseEvents(),"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,n=t.curve;return e._drawCurve({color:o,curve:n})},function(t){var o=t.color,n=t.point;return e._drawDot({color:o,point:n})}),this._data=t},o.prototype.toData=function(){return this._data},o.prototype._strokeBegin=function(t){var e={color:this.penColor,points:[]};this._data.push(e),this._reset(),this._strokeUpdate(t),"function"==typeof this.onBegin&&this.onBegin(t)},o.prototype._strokeUpdate=function(t){var e=t.clientX,o=t.clientY,n=this._createPoint(e,o),i=this._data[this._data.length-1],s=i.points,r=s.length>0&&s[s.length-1],h=!!r&&n.distanceTo(r)<=this.minDistance,a=i.color;if(!r||!r||!h){var c=this._addPoint(n);r?c&&this._drawCurve({color:a,curve:c}):this._drawDot({color:a,point:n}),s.push({time:n.time,x:n.x,y:n.y})}},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 n=this.canvas.getBoundingClientRect();return new t(e-n.left,o-n.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 n=this._calculateCurveWidths(o[1],o[2]),i=e.fromPoints(o,n);return o.shift(),i}return null},o.prototype._calculateCurveWidths=function(t,e){var o=this.velocityFilterWeight*e.velocityFrom(t)+(1-this.velocityFilterWeight)*this._lastVelocity,n=this._strokeWidth(o),i={end:n,start:this._lastWidth};return this._lastVelocity=o,this._lastWidth=n,i},o.prototype._strokeWidth=function(t){return Math.max(this.maxWidth/(t+1),this.minWidth)},o.prototype._drawCurveSegment=function(t,e,o){var n=this._ctx;n.moveTo(t,e),n.arc(t,e,o,0,2*Math.PI,!1),this._isEmpty=!1},o.prototype._drawCurve=function(t){var e=t.color,o=t.curve,n=this._ctx,i=o.endWidth-o.startWidth,s=2*Math.floor(o.length());n.beginPath(),n.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=o.startWidth+c*i;this._drawCurveSegment(v,p,f)}n.closePath(),n.fill()},o.prototype._drawDot=function(t){var e=t.color,o=t.point,n=this._ctx,i="function"==typeof this.dotSize?this.dotSize():this.dotSize;n.beginPath(),this._drawCurveSegment(o.x,o.y,i),n.closePath(),n.fillStyle=e,n.fill()},o.prototype._fromData=function(e,o,n){for(var i=0,s=e;i<s.length;i++){var r=s[i],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(),n({color:h,point:a[0]})}},o.prototype._toSVG=function(){var t=this,e=this._data,o=Math.max(window.devicePixelRatio||1,1),n=this.canvas.width/o,i=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,n=document.createElement("path");if(!(isNaN(o.control1.x)||isNaN(o.control1.y)||isNaN(o.control2.x)||isNaN(o.control2.y))){var i="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);n.setAttribute("d",i),n.setAttribute("stroke-width",(2.25*o.endWidth).toFixed(3)),n.setAttribute("stroke",e),n.setAttribute("fill","none"),n.setAttribute("stroke-linecap","round"),s.appendChild(n)}},function(e){var o=e.color,n=e.point,i=document.createElement("circle"),r="function"==typeof t.dotSize?t.dotSize():t.dotSize;i.setAttribute("r",r.toString()),i.setAttribute("cx",n.x.toString()),i.setAttribute("cy",n.y.toString()),i.setAttribute("fill",o),s.appendChild(i)});var r='<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 '+n+" "+i+'" width="'+n+'" height="'+i+'">',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}()});
/*!
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 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}()}));
//# sourceMappingURL=signature_pad.umd.min.js.map

8

dist/types/bezier.d.ts

@@ -1,6 +0,6 @@

import { IBasicPoint, Point } from './point';
import { BasicPoint, Point } from './point';
export declare class Bezier {
startPoint: Point;
control2: IBasicPoint;
control1: IBasicPoint;
control2: BasicPoint;
control1: BasicPoint;
endPoint: Point;

@@ -14,5 +14,5 @@ startWidth: number;

private static calculateControlPoints;
constructor(startPoint: Point, control2: IBasicPoint, control1: IBasicPoint, endPoint: Point, startWidth: number, endWidth: number);
constructor(startPoint: Point, control2: BasicPoint, control1: BasicPoint, endPoint: Point, startWidth: number, endWidth: number);
length(): number;
private point;
}

10

dist/types/point.d.ts

@@ -1,2 +0,2 @@

export interface IBasicPoint {
export interface BasicPoint {
x: number;

@@ -6,3 +6,3 @@ y: number;

}
export declare class Point implements IBasicPoint {
export declare class Point implements BasicPoint {
x: number;

@@ -12,5 +12,5 @@ y: number;

constructor(x: number, y: number, time?: number);
distanceTo(start: IBasicPoint): number;
equals(other: IBasicPoint): boolean;
velocityFrom(start: IBasicPoint): number;
distanceTo(start: BasicPoint): number;
equals(other: BasicPoint): boolean;
velocityFrom(start: BasicPoint): number;
}

30

dist/types/signature_pad.d.ts

@@ -1,8 +0,18 @@

import { IBasicPoint } from './point';
/**
* The main idea and some parts of the code (e.g. drawing variable width Bézier curve) are taken from:
* http://corner.squareup.com/2012/07/smoother-signatures.html
*
* Implementation of interpolation using cubic Bézier curves is taken from:
* http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
*
* Algorithm for approximated length of a Bézier curve is taken from:
* http://www.lemoda.net/maths/bezier-length/index.html
*/
import { BasicPoint } from './point';
declare global {
interface Window {
PointerEvent: typeof PointerEvent;
interface CSSStyleDeclaration {
msTouchAction: string;
}
}
export interface IOptions {
export interface Options {
dotSize?: number | (() => number);

@@ -19,5 +29,5 @@ minWidth?: number;

}
export interface IPointGroup {
export interface PointGroup {
color: string;
points: IBasicPoint[];
points: BasicPoint[];
}

@@ -45,3 +55,3 @@ export default class SignaturePad {

private _strokeMoveUpdate;
constructor(canvas: HTMLCanvasElement, options?: IOptions);
constructor(canvas: HTMLCanvasElement, options?: Options);
clear(): void;

@@ -52,3 +62,3 @@ fromDataURL(dataUrl: string, options?: {

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

@@ -58,4 +68,4 @@ on(): void;

isEmpty(): boolean;
fromData(pointGroups: IPointGroup[]): void;
toData(): IPointGroup[];
fromData(pointGroups: PointGroup[]): void;
toData(): PointGroup[];
private _handleMouseDown;

@@ -62,0 +72,0 @@ private _handleMouseMove;

1027

docs/js/signature_pad.umd.js
/*!
* Signature Pad v3.0.0-beta.3 | https://github.com/szimek/signature_pad
* (c) 2018 Szymon Nowak | Released under the MIT license
* Signature Pad v3.0.0-beta.4 | https://github.com/szimek/signature_pad
* (c) 2020 Szymon Nowak | Released under the MIT license
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.SignaturePad = factory());
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.SignaturePad = factory());
}(this, (function () { 'use strict';
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (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) {
return (this.time !== start.time) ? this.distanceTo(start) / (this.time - start.time) : 0;
};
return Point;
}());
var Point = (function () {
function Point(x, y, time) {
this.x = x;
this.y = y;
this.time = time || Date.now();
}
Point.prototype.distanceTo = function (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) {
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) {
this.startPoint = startPoint;
this.control2 = control2;
this.control1 = control1;
this.endPoint = endPoint;
this.startWidth = startWidth;
this.endWidth = endWidth;
}
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;
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;
return {
c1: new Point(m1.x + tx, m1.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);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
length += Math.sqrt((xdiff * xdiff) + (ydiff * ydiff));
}
px = cx;
py = cy;
}
return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ (3.0 * c2 * (1.0 - t) * t * t)
+ (end * t * t * t);
};
return Bezier;
}());
var Bezier = (function () {
function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
this.startPoint = startPoint;
this.control2 = control2;
this.control1 = control1;
this.endPoint = endPoint;
this.startWidth = startWidth;
this.endWidth = endWidth;
}
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;
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;
return {
c1: new Point(m1.x + tx, m1.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);
if (i > 0) {
var xdiff = cx - px;
var ydiff = cy - py;
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
}
px = cx;
py = cy;
}
return length;
};
Bezier.prototype.point = function (t, start, c1, c2, end) {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ (3.0 * c2 * (1.0 - t) * 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 () {
previous = Date.now();
timeout = null;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
};
return function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var now = Date.now();
var remaining = wait - (now - previous);
storedContext = this;
storedArgs = args;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
}
else if (!timeout) {
timeout = window.setTimeout(later, remaining);
}
return result;
};
}
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 () {
previous = Date.now();
timeout = null;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
};
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);
storedContext = this;
storedArgs = args;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
}
else if (!timeout) {
timeout = window.setTimeout(later, remaining);
}
return result;
};
}
var SignaturePad = (function () {
function SignaturePad(canvas, options) {
if (options === void 0) { options = {}; }
var _this = this;
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
this.minWidth = options.minWidth || 0.5;
this.maxWidth = options.maxWidth || 2.5;
this.throttle = ('throttle' in options ? options.throttle : 16);
this.minDistance = ('minDistance' in options ? options.minDistance : 5);
if (this.throttle) {
this._strokeMoveUpdate = throttle(SignaturePad.prototype._strokeUpdate, this.throttle);
}
else {
this._strokeMoveUpdate = SignaturePad.prototype._strokeUpdate;
}
this.dotSize = options.dotSize || function () {
return (this.minWidth + this.maxWidth) / 2;
};
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._ctx = canvas.getContext('2d');
this.clear();
this.on();
}
SignaturePad.prototype.clear = function () {
var ctx = this._ctx;
var canvas = this.canvas;
ctx.fillStyle = this.backgroundColor;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.fillRect(0, 0, canvas.width, canvas.height);
this._data = [];
this._reset();
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'; }
switch (type) {
case 'image/svg+xml':
return this._toSVG();
default:
return this.canvas.toDataURL(type, encoderOptions);
}
};
SignaturePad.prototype.on = function () {
this.canvas.style.touchAction = 'none';
this.canvas.style.msTouchAction = 'none';
if (window.PointerEvent) {
this._handlePointerEvents();
}
else {
this._handleMouseEvents();
if ('ontouchstart' in window) {
this._handleTouchEvents();
}
}
};
SignaturePad.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);
};
SignaturePad.prototype.isEmpty = function () {
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 () {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: this.penColor,
points: []
};
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
};
SignaturePad.prototype._strokeUpdate = function (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 ? point.distanceTo(lastPoint) <= this.minDistance : false;
var color = lastPointGroup.color;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
}
lastPoints.push({
time: point.time,
x: point.x,
y: point.y
});
}
};
SignaturePad.prototype._strokeEnd = function (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.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
this._lastPoints = [];
this._lastVelocity = 0;
this._lastWidth = (this.minWidth + this.maxWidth) / 2;
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;
_lastPoints.push(point);
if (_lastPoints.length > 2) {
if (_lastPoints.length === 3) {
_lastPoints.unshift(_lastPoints[0]);
}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();
return curve;
}
return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = (this.velocityFilterWeight * endPoint.velocityFrom(startPoint))
+ ((1 - this.velocityFilterWeight) * this._lastVelocity);
var newWidth = this._strokeWidth(velocity);
var widths = {
end: newWidth,
start: this._lastWidth
};
this._lastVelocity = velocity;
this._lastWidth = newWidth;
return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var 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;
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;
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;
y += 3 * uu * t * curve.control1.y;
y += 3 * u * tt * curve.control2.y;
y += ttt * curve.endPoint.y;
var width = curve.startWidth + (ttt * widthDelta);
this._drawCurveSegment(x, y, width);
}
ctx.closePath();
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;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
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;
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;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
}
}
}
else {
this._reset();
drawDot({
color: color,
point: points[0]
});
}
}
};
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');
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');
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!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));
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('fill', 'none');
path.setAttribute('stroke-linecap', 'round');
svg.appendChild(path);
}
}, 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());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var 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 + "\"")
+ '>';
var body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));
}
body = dummy.innerHTML;
}
var footer = '</svg>';
var data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
var SignaturePad = (function () {
function SignaturePad(canvas, options) {
var _this = this;
if (options === void 0) { options = {}; }
this.canvas = canvas;
this.options = options;
this._handleMouseDown = function (event) {
if (event.which === 1) {
_this._mouseButtonDown = true;
_this._strokeBegin(event);
}
};
this._handleMouseMove = function (event) {
if (_this._mouseButtonDown) {
_this._strokeMoveUpdate(event);
}
};
this._handleMouseUp = function (event) {
if (event.which === 1 && _this._mouseButtonDown) {
_this._mouseButtonDown = false;
_this._strokeEnd(event);
}
};
this._handleTouchStart = function (event) {
event.preventDefault();
if (event.targetTouches.length === 1) {
var touch = event.changedTouches[0];
_this._strokeBegin(touch);
}
};
this._handleTouchMove = function (event) {
event.preventDefault();
var touch = event.targetTouches[0];
_this._strokeMoveUpdate(touch);
};
this._handleTouchEnd = function (event) {
var wasCanvasTouched = event.target === _this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
var touch = event.changedTouches[0];
_this._strokeEnd(touch);
}
};
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
this.minWidth = options.minWidth || 0.5;
this.maxWidth = options.maxWidth || 2.5;
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.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
? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)
: SignaturePad.prototype._strokeUpdate;
this._ctx = canvas.getContext('2d');
this.clear();
this.on();
}
SignaturePad.prototype.clear = function () {
var _a = this, ctx = _a._ctx, canvas = _a.canvas;
ctx.fillStyle = this.backgroundColor;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.fillRect(0, 0, canvas.width, canvas.height);
this._data = [];
this._reset();
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'; }
switch (type) {
case 'image/svg+xml':
return this._toSVG();
default:
return this.canvas.toDataURL(type, encoderOptions);
}
};
SignaturePad.prototype.on = function () {
this.canvas.style.touchAction = 'none';
this.canvas.style.msTouchAction = 'none';
if (window.PointerEvent) {
this._handlePointerEvents();
}
else {
this._handleMouseEvents();
if ('ontouchstart' in window) {
this._handleTouchEvents();
}
}
};
SignaturePad.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);
};
SignaturePad.prototype.isEmpty = function () {
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 () {
return this._data;
};
SignaturePad.prototype._strokeBegin = function (event) {
var newPointGroup = {
color: 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) {
if (this._data.length === 0) {
this._strokeBegin(event);
return;
}
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
? point.distanceTo(lastPoint) <= this.minDistance
: false;
var color = lastPointGroup.color;
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
var curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color: color, point: point });
}
else if (curve) {
this._drawCurve({ color: color, curve: curve });
}
lastPoints.push({
time: point.time,
x: point.x,
y: point.y
});
}
};
SignaturePad.prototype._strokeEnd = function (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.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
};
SignaturePad.prototype._handleTouchEvents = function () {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
};
SignaturePad.prototype._reset = function () {
this._lastPoints = [];
this._lastVelocity = 0;
this._lastWidth = (this.minWidth + this.maxWidth) / 2;
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;
_lastPoints.push(point);
if (_lastPoints.length > 2) {
if (_lastPoints.length === 3) {
_lastPoints.unshift(_lastPoints[0]);
}
var widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
var curve = Bezier.fromPoints(_lastPoints, widths);
_lastPoints.shift();
return curve;
}
return null;
};
SignaturePad.prototype._calculateCurveWidths = function (startPoint, endPoint) {
var velocity = this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
(1 - this.velocityFilterWeight) * this._lastVelocity;
var newWidth = this._strokeWidth(velocity);
var widths = {
end: newWidth,
start: this._lastWidth
};
this._lastVelocity = velocity;
this._lastWidth = newWidth;
return widths;
};
SignaturePad.prototype._strokeWidth = function (velocity) {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
};
SignaturePad.prototype._drawCurveSegment = function (x, y, width) {
var 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;
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;
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;
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);
this._drawCurveSegment(x, y, width);
}
ctx.closePath();
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;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
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;
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;
if (j === 0) {
this._reset();
}
var curve = this._addPoint(point);
if (curve) {
drawCurve({ color: color, curve: curve });
}
}
}
else {
this._reset();
drawDot({
color: color,
point: points[0]
});
}
}
};
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');
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');
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!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));
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('fill', 'none');
path.setAttribute('stroke-linecap', 'round');
svg.appendChild(path);
}
}, 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());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
svg.appendChild(circle);
});
var prefix = 'data:image/svg+xml;base64,';
var 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 + "\"") +
'>';
var body = svg.innerHTML;
if (body === undefined) {
var dummy = document.createElement('dummy');
var nodes = svg.childNodes;
dummy.innerHTML = '';
for (var i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));
}
body = dummy.innerHTML;
}
var footer = '</svg>';
var data = header + body + footer;
return prefix + btoa(data);
};
return SignaturePad;
}());
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.3",
"version": "3.0.0-beta.4",
"homepage": "https://github.com/szimek/signature_pad",

@@ -13,13 +13,16 @@ "author": {

"source": "src/signature_pad.ts",
"dev:main": "dist/signature_pad.js",
"main": "dist/signature_pad.min.js",
"module": "dist/signature_pad.m.js",
"umd:main": "dist/signature_pad.umd.js",
"main": "dist/signature_pad.umd.js",
"module": "dist/signature_pad.js",
"types": "dist/types/signature_pad.d.ts",
"scripts": {
"build": "del dist && rollup --config && mkdir dist/types && mv dist/*.d.ts dist/types && cp dist/signature_pad.umd.js docs/js/",
"build": "yarn run lint && yarn run clean && rollup --config && yarn run emit-types && yarn run update-docs",
"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'",
"prepublishOnly": "yarn run build",
"serve": "serve -l 9000 docs",
"start": "yarn run build && yarn run serve",
"test": "jest --coverage"
"test": "jest --coverage",
"update-docs": "cp dist/signature_pad.umd.js docs/js/"
},

@@ -36,16 +39,34 @@ "repository": {

"devDependencies": {
"@types/jest": "^23.1.1",
"canvas-prebuilt": "^1.6.5-prerelease.1",
"del": "^3.0.0",
"del-cli": "^1.1.0",
"jest": "^23.1.0",
"rollup": "^0.61.2",
"rollup-plugin-terser": "^1.0.1",
"rollup-plugin-tslint": "^0.1.34",
"rollup-plugin-typescript2": "^0.15.0",
"serve": "^9.1.0",
"ts-jest": "^22.4.6",
"tslint": "^5.11.0",
"typescript": "^2.9.2"
"@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-terser": "^7.0.2",
"serve": "^11.3.2",
"ts-jest": "^26.3.0",
"tslib": "^2.0.1",
"typescript": "^4.0.3"
},
"husky": {
"hooks": {
"pre-commit": "lint-staged"
}
},
"lint-staged": {
"*.ts": [
"yarn run prettier",
"yarn run lint"
]
},
"jest": {

@@ -52,0 +73,0 @@ "moduleFileExtensions": [

9

README.md

@@ -163,2 +163,11 @@ # 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)

Here's an example in C# for ASP.NET:
``` csharp
var dataUri = "data:image/png;base64,iVBORw0K...";
var encodedImage = dataUri.Split(",")[1];
var decodedImage = Convert.FromBase64String(encodedImage);
System.IO.File.WriteAllBytes("signature.png", decodedImage);
```
#### Removing empty space around a signature

@@ -165,0 +174,0 @@ If you'd like to remove (trim) empty space around a signature, you can do it on the server side or the client side. On the server side you can use e.g. ImageMagic and its `trim` option: `convert -trim input.jpg output.jpg`. If you don't have access to the server, or just want to trim the image before submitting it to the server, you can do it on the client side as well. There are a few examples how to do it, e.g. [here](https://github.com/szimek/signature_pad/issues/49#issue-29108215) or [here](https://github.com/szimek/signature_pad/issues/49#issuecomment-260976909) and there's also a tiny library [trim-canvas](https://github.com/agilgur5/trim-canvas) that provides this functionality.

42

src/bezier.ts

@@ -1,5 +0,8 @@

import { IBasicPoint, Point } from './point';
import { BasicPoint, Point } from './point';
export class Bezier {
public static fromPoints(points: Point[], widths: { start: number, end: number }): Bezier {
public static fromPoints(
points: Point[],
widths: { start: number; end: number },
): Bezier {
const c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;

@@ -12,8 +15,8 @@ const c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;

private static calculateControlPoints(
s1: IBasicPoint,
s2: IBasicPoint,
s3: IBasicPoint,
s1: BasicPoint,
s2: BasicPoint,
s3: BasicPoint,
): {
c1: IBasicPoint,
c2: IBasicPoint,
c1: BasicPoint;
c2: BasicPoint;
} {

@@ -28,10 +31,10 @@ const dx1 = s1.x - s2.x;

const l1 = Math.sqrt((dx1 * dx1) + (dy1 * dy1));
const l2 = Math.sqrt((dx2 * dx2) + (dy2 * dy2));
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 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 cm = { x: m2.x + dxm * k, y: m2.y + dym * k };

@@ -49,4 +52,4 @@ const tx = s2.x - cm.x;

public startPoint: Point,
public control2: IBasicPoint,
public control1: IBasicPoint,
public control2: BasicPoint,
public control1: BasicPoint,
public endPoint: Point,

@@ -85,3 +88,3 @@ public startWidth: number,

length += Math.sqrt((xdiff * xdiff) + (ydiff * ydiff));
length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
}

@@ -97,3 +100,10 @@

// Calculate parametric value of x or y given t and the four point coordinates of a cubic bezier curve.
private point(t: number, start: number, c1: number, c2: number, end: number): number {
private point(
t: number,
start: number,
c1: number,
c2: number,
end: number,
): number {
// prettier-ignore
return ( start * (1.0 - t) * (1.0 - t) * (1.0 - t))

@@ -100,0 +110,0 @@ + (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)

18

src/point.ts
// Interface for point data structure used e.g. in SignaturePad#fromData method
export interface IBasicPoint {
export interface BasicPoint {
x: number;

@@ -8,3 +8,3 @@ y: number;

export class Point implements IBasicPoint {
export class Point implements BasicPoint {
public time: number;

@@ -16,13 +16,17 @@

public distanceTo(start: IBasicPoint): number {
return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
public distanceTo(start: BasicPoint): number {
return Math.sqrt(
Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2),
);
}
public equals(other: IBasicPoint): boolean {
public equals(other: BasicPoint): boolean {
return this.x === other.x && this.y === other.y && this.time === other.time;
}
public velocityFrom(start: IBasicPoint): number {
return (this.time !== start.time) ? this.distanceTo(start) / (this.time - start.time) : 0;
public velocityFrom(start: BasicPoint): number {
return this.time !== start.time
? this.distanceTo(start) / (this.time - start.time)
: 0;
}
}

189

src/signature_pad.ts

@@ -13,13 +13,12 @@ /**

import { Bezier } from './bezier';
import { IBasicPoint, Point } from './point';
import { BasicPoint, Point } from './point';
import { throttle } from './throttle';
declare global {
// tslint:disable-next-line:interface-name
interface Window {
PointerEvent: typeof PointerEvent;
declare global {
interface CSSStyleDeclaration {
msTouchAction: string;
}
}
export interface IOptions {
export interface Options {
dotSize?: number | (() => number);

@@ -37,5 +36,5 @@ minWidth?: number;

export interface IPointGroup {
export interface PointGroup {
color: string;
points: IBasicPoint[];
points: BasicPoint[];
}

@@ -62,3 +61,3 @@

private _lastPoints: Point[]; // Stores up to 4 most recent points; used to generate a new curve
private _data: IPointGroup[]; // Stores all points in groups (one group per line or dot)
private _data: PointGroup[]; // Stores all points in groups (one group per line or dot)
private _lastVelocity: number;

@@ -69,3 +68,6 @@ private _lastWidth: number;

constructor(private canvas: HTMLCanvasElement, private options: IOptions = {}) {
constructor(
private canvas: HTMLCanvasElement,
private options: Options = {},
) {
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;

@@ -75,13 +77,10 @@ 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
if (this.throttle) {
this._strokeMoveUpdate = throttle(SignaturePad.prototype._strokeUpdate, this.throttle);
} else {
this._strokeMoveUpdate = SignaturePad.prototype._strokeUpdate;
}
this.dotSize = options.dotSize || function (this: SignaturePad) {
return (this.minWidth + this.maxWidth) / 2;
};
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.penColor = options.penColor || 'black';

@@ -92,3 +91,7 @@ this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';

this._strokeMoveUpdate = this.throttle
? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)
: SignaturePad.prototype._strokeUpdate;
this._ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
this.clear();

@@ -101,4 +104,3 @@

public clear(): void {
const ctx = this._ctx;
const canvas = this.canvas;
const { _ctx: ctx, canvas } = this;

@@ -117,18 +119,22 @@ // Clear canvas using background color

dataUrl: string,
options: { ratio?: number, width?: number, height?: number } = {},
callback?: (error?: ErrorEvent) => void,
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);
const width = options.width || this.canvas.width / ratio;
const height = options.height || this.canvas.height / ratio;
this._reset();
image.onload = () => {
image.onload = (): void => {
this._ctx.drawImage(image, 0, 0, width, height);
if (callback) { callback(); }
if (callback) {
callback();
}
};
image.onerror = (error) => {
if (callback) { callback(error); }
image.onerror = (error): void => {
if (callback) {
callback(error);
}
};

@@ -140,3 +146,3 @@ image.src = dataUrl;

public toDataURL(type = 'image/png', encoderOptions?: number) {
public toDataURL(type = 'image/png', encoderOptions?: number): string {
switch (type) {

@@ -161,3 +167,3 @@ case 'image/svg+xml':

if ('ontouchstart' in window) {
this._handleTouchEvents();
this._handleTouchEvents();
}

@@ -189,3 +195,3 @@ }

public fromData(pointGroups: IPointGroup[]): void {
public fromData(pointGroups: PointGroup[]): void {
this.clear();

@@ -202,3 +208,3 @@

public toData(): IPointGroup[] {
public toData(): PointGroup[] {
return this._data;

@@ -213,3 +219,3 @@ }

}
}
};

@@ -220,3 +226,3 @@ private _handleMouseMove = (event: MouseEvent): void => {

}
}
};

@@ -228,3 +234,3 @@ private _handleMouseUp = (event: MouseEvent): void => {

}
}
};

@@ -239,3 +245,3 @@ private _handleTouchStart = (event: TouchEvent): void => {

}
}
};

@@ -248,3 +254,3 @@ private _handleTouchMove = (event: TouchEvent): void => {

this._strokeMoveUpdate(touch);
}
};

@@ -259,3 +265,3 @@ private _handleTouchEnd = (event: TouchEvent): void => {

}
}
};

@@ -269,12 +275,19 @@ // Private methods

if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
}
if (typeof this.onBegin === 'function') {
this.onBegin(event);
private _strokeUpdate(event: MouseEvent | Touch): void {
if (this._data.length === 0) {
// This can happen if clear() was called while a signature is still in progress,
// or if there is a race condition between start/update events.
this._strokeBegin(event);
return;
}
}
private _strokeUpdate(event: MouseEvent | Touch): void {
const x = event.clientX;

@@ -286,4 +299,7 @@ const y = event.clientY;

const lastPoints = lastPointGroup.points;
const lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
const isLastPointTooClose = lastPoint ? point.distanceTo(lastPoint) <= this.minDistance : false;
const lastPoint =
lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
const isLastPointTooClose = lastPoint
? point.distanceTo(lastPoint) <= this.minDistance
: false;
const color = lastPointGroup.color;

@@ -350,7 +366,3 @@

return new Point(
x - rect.left,
y - rect.top,
new Date().getTime(),
);
return new Point(x - rect.left, y - rect.top, new Date().getTime());
}

@@ -384,5 +396,9 @@

private _calculateCurveWidths(startPoint: Point, endPoint: Point): { start: number, end: number } {
const velocity = (this.velocityFilterWeight * endPoint.velocityFrom(startPoint))
+ ((1 - this.velocityFilterWeight) * this._lastVelocity);
private _calculateCurveWidths(
startPoint: Point,
endPoint: Point,
): { start: number; end: number } {
const velocity =
this.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
(1 - this.velocityFilterWeight) * this._lastVelocity;

@@ -414,3 +430,3 @@ const newWidth = this._strokeWidth(velocity);

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

@@ -444,3 +460,6 @@ const widthDelta = curve.endWidth - curve.startWidth;

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

@@ -453,5 +472,12 @@ }

private _drawDot({ color, point }: { color: string, point: IBasicPoint }): void {
private _drawDot({
color,
point,
}: {
color: string;
point: BasicPoint;
}): void {
const ctx = this._ctx;
const width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
const width =
typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;

@@ -466,3 +492,3 @@ ctx.beginPath();

private _fromData(
pointGroups: IPointGroup[],
pointGroups: PointGroup[],
drawCurve: SignaturePad['_drawCurve'],

@@ -519,3 +545,3 @@ drawDot: SignaturePad['_drawDot'],

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

@@ -527,10 +553,15 @@

/* eslint-disable no-restricted-globals */
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!isNaN(curve.control2.y)) {
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)}`;
if (
!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!isNaN(curve.control2.y)
) {
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);

@@ -547,5 +578,6 @@ path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));

({ color, point }: { color: string, point: IBasicPoint }) => {
({ color, point }: { color: string; point: BasicPoint }) => {
const circle = document.createElement('circle');
const dotSize = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
const dotSize =
typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
circle.setAttribute('r', dotSize.toString());

@@ -561,9 +593,10 @@ circle.setAttribute('cx', point.x.toString());

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="${maxY}"`
+ '>';
const header =
'<svg' +
' xmlns="http://www.w3.org/2000/svg"' +
' xmlns:xlink="http://www.w3.org/1999/xlink"' +
` viewBox="${minX} ${minY} ${maxX} ${maxY}"` +
` width="${maxX}"` +
` height="${maxY}"` +
'>';
let body = svg.innerHTML;

@@ -570,0 +603,0 @@

10

src/throttle.ts

@@ -0,4 +1,8 @@

/* eslint-disable @typescript-eslint/no-explicit-any */
// Slightly simplified version of http://stackoverflow.com/a/27078401/815507
export function throttle(fn: (...args: any[]) => any, wait = 250) {
export function throttle(
fn: (...args: any[]) => any,
wait = 250,
): (this: any, ...args: any[]) => any {
let previous = 0;

@@ -10,3 +14,3 @@ let timeout: number | null = null;

const later = () => {
const later = (): void => {
previous = Date.now();

@@ -22,3 +26,3 @@ timeout = null;

return function (this: any, ...args: any[]) {
return function wrapper(this: any, ...args: any[]): any {
const now = Date.now();

@@ -25,0 +29,0 @@ const remaining = wait - (now - previous);

dist/signature_pad.m.js
dist/signature_pad.m.min.js
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