mirror of
https://github.com/invoiceninja/invoiceninja.git
synced 2025-11-03 19:18:56 -05:00
642 lines
27 KiB
JavaScript
Vendored
642 lines
27 KiB
JavaScript
Vendored
/*!
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* Signature Pad v5.0.2 | https://github.com/szimek/signature_pad
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* (c) 2024 Szymon Nowak | Released under the MIT license
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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typeof define === 'function' && define.amd ? define(factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.SignaturePad = factory());
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})(this, (function () { 'use strict';
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class Point {
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constructor(x, y, pressure, time) {
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if (isNaN(x) || isNaN(y)) {
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throw new Error(`Point is invalid: (${x}, ${y})`);
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}
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this.x = +x;
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this.y = +y;
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this.pressure = pressure || 0;
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this.time = time || Date.now();
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}
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distanceTo(start) {
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return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
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}
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equals(other) {
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return (this.x === other.x &&
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this.y === other.y &&
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this.pressure === other.pressure &&
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this.time === other.time);
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}
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velocityFrom(start) {
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return this.time !== start.time
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? this.distanceTo(start) / (this.time - start.time)
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: 0;
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}
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}
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class Bezier {
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static fromPoints(points, widths) {
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const c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
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const c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
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return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end);
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}
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static calculateControlPoints(s1, s2, s3) {
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const dx1 = s1.x - s2.x;
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const dy1 = s1.y - s2.y;
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const dx2 = s2.x - s3.x;
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const dy2 = s2.y - s3.y;
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const m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
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const m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
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const l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
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const l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
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const dxm = m1.x - m2.x;
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const dym = m1.y - m2.y;
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const k = l2 / (l1 + l2);
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const cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
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const tx = s2.x - cm.x;
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const ty = s2.y - cm.y;
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return {
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c1: new Point(m1.x + tx, m1.y + ty),
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c2: new Point(m2.x + tx, m2.y + ty),
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};
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}
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constructor(startPoint, control2, control1, endPoint, startWidth, endWidth) {
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this.startPoint = startPoint;
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this.control2 = control2;
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this.control1 = control1;
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this.endPoint = endPoint;
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this.startWidth = startWidth;
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this.endWidth = endWidth;
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}
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length() {
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const steps = 10;
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let length = 0;
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let px;
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let py;
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for (let i = 0; i <= steps; i += 1) {
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const t = i / steps;
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const cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
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const cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
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if (i > 0) {
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const xdiff = cx - px;
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const ydiff = cy - py;
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length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
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}
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px = cx;
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py = cy;
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}
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return length;
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}
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point(t, start, c1, c2, end) {
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return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
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+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
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+ (3.0 * c2 * (1.0 - t) * t * t)
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+ (end * t * t * t);
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}
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}
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class SignatureEventTarget {
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constructor() {
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try {
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this._et = new EventTarget();
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}
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catch (error) {
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this._et = document;
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}
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}
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addEventListener(type, listener, options) {
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this._et.addEventListener(type, listener, options);
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}
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dispatchEvent(event) {
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return this._et.dispatchEvent(event);
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}
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removeEventListener(type, callback, options) {
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this._et.removeEventListener(type, callback, options);
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}
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}
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function throttle(fn, wait = 250) {
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let previous = 0;
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let timeout = null;
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let result;
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let storedContext;
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let storedArgs;
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const later = () => {
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previous = Date.now();
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timeout = null;
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result = fn.apply(storedContext, storedArgs);
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if (!timeout) {
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storedContext = null;
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storedArgs = [];
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}
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};
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return function wrapper(...args) {
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const now = Date.now();
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const remaining = wait - (now - previous);
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storedContext = this;
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storedArgs = args;
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if (remaining <= 0 || remaining > wait) {
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if (timeout) {
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clearTimeout(timeout);
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timeout = null;
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}
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previous = now;
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result = fn.apply(storedContext, storedArgs);
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if (!timeout) {
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storedContext = null;
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storedArgs = [];
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}
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}
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else if (!timeout) {
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timeout = window.setTimeout(later, remaining);
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}
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return result;
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};
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}
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class SignaturePad extends SignatureEventTarget {
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constructor(canvas, options = {}) {
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var _a, _b, _c;
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super();
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this.canvas = canvas;
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this._drawingStroke = false;
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this._isEmpty = true;
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this._lastPoints = [];
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this._data = [];
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this._lastVelocity = 0;
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this._lastWidth = 0;
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this._handleMouseDown = (event) => {
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if (!this._isLeftButtonPressed(event, true) || this._drawingStroke) {
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return;
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}
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this._strokeBegin(this._pointerEventToSignatureEvent(event));
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};
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this._handleMouseMove = (event) => {
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if (!this._isLeftButtonPressed(event, true) || !this._drawingStroke) {
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this._strokeEnd(this._pointerEventToSignatureEvent(event), false);
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return;
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}
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this._strokeMoveUpdate(this._pointerEventToSignatureEvent(event));
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};
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this._handleMouseUp = (event) => {
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if (this._isLeftButtonPressed(event)) {
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return;
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}
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this._strokeEnd(this._pointerEventToSignatureEvent(event));
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};
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this._handleTouchStart = (event) => {
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if (event.targetTouches.length !== 1 || this._drawingStroke) {
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return;
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}
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if (event.cancelable) {
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event.preventDefault();
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}
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this._strokeBegin(this._touchEventToSignatureEvent(event));
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};
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this._handleTouchMove = (event) => {
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if (event.targetTouches.length !== 1) {
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return;
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}
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if (event.cancelable) {
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event.preventDefault();
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}
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if (!this._drawingStroke) {
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this._strokeEnd(this._touchEventToSignatureEvent(event), false);
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return;
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}
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this._strokeMoveUpdate(this._touchEventToSignatureEvent(event));
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};
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this._handleTouchEnd = (event) => {
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if (event.targetTouches.length !== 0) {
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return;
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}
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if (event.cancelable) {
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event.preventDefault();
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}
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this.canvas.removeEventListener('touchmove', this._handleTouchMove);
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this._strokeEnd(this._touchEventToSignatureEvent(event));
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};
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this._handlePointerDown = (event) => {
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if (!this._isLeftButtonPressed(event) || this._drawingStroke) {
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return;
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}
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event.preventDefault();
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this._strokeBegin(this._pointerEventToSignatureEvent(event));
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};
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this._handlePointerMove = (event) => {
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if (!this._isLeftButtonPressed(event, true) || !this._drawingStroke) {
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this._strokeEnd(this._pointerEventToSignatureEvent(event), false);
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return;
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}
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event.preventDefault();
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this._strokeMoveUpdate(this._pointerEventToSignatureEvent(event));
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};
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this._handlePointerUp = (event) => {
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if (this._isLeftButtonPressed(event)) {
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return;
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}
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event.preventDefault();
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this._strokeEnd(this._pointerEventToSignatureEvent(event));
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};
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this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
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this.minWidth = options.minWidth || 0.5;
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this.maxWidth = options.maxWidth || 2.5;
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this.throttle = (_a = options.throttle) !== null && _a !== void 0 ? _a : 16;
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this.minDistance = (_b = options.minDistance) !== null && _b !== void 0 ? _b : 5;
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this.dotSize = options.dotSize || 0;
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this.penColor = options.penColor || 'black';
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this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
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this.compositeOperation = options.compositeOperation || 'source-over';
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this.canvasContextOptions = (_c = options.canvasContextOptions) !== null && _c !== void 0 ? _c : {};
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this._strokeMoveUpdate = this.throttle
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? throttle(SignaturePad.prototype._strokeUpdate, this.throttle)
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: SignaturePad.prototype._strokeUpdate;
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this._ctx = canvas.getContext('2d', this.canvasContextOptions);
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this.clear();
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this.on();
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}
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clear() {
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const { _ctx: ctx, canvas } = this;
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ctx.fillStyle = this.backgroundColor;
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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this._data = [];
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this._reset(this._getPointGroupOptions());
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this._isEmpty = true;
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}
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fromDataURL(dataUrl, options = {}) {
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return new Promise((resolve, reject) => {
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const image = new Image();
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const ratio = options.ratio || window.devicePixelRatio || 1;
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const width = options.width || this.canvas.width / ratio;
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const height = options.height || this.canvas.height / ratio;
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const xOffset = options.xOffset || 0;
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const yOffset = options.yOffset || 0;
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this._reset(this._getPointGroupOptions());
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image.onload = () => {
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this._ctx.drawImage(image, xOffset, yOffset, width, height);
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resolve();
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};
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image.onerror = (error) => {
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reject(error);
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};
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image.crossOrigin = 'anonymous';
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image.src = dataUrl;
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this._isEmpty = false;
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});
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}
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toDataURL(type = 'image/png', encoderOptions) {
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switch (type) {
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case 'image/svg+xml':
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if (typeof encoderOptions !== 'object') {
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encoderOptions = undefined;
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}
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return `data:image/svg+xml;base64,${btoa(this.toSVG(encoderOptions))}`;
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default:
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if (typeof encoderOptions !== 'number') {
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encoderOptions = undefined;
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}
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return this.canvas.toDataURL(type, encoderOptions);
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}
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}
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on() {
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this.canvas.style.touchAction = 'none';
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this.canvas.style.msTouchAction = 'none';
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this.canvas.style.userSelect = 'none';
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const isIOS = /Macintosh/.test(navigator.userAgent) && 'ontouchstart' in document;
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if (window.PointerEvent && !isIOS) {
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this._handlePointerEvents();
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}
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else {
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this._handleMouseEvents();
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if ('ontouchstart' in window) {
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this._handleTouchEvents();
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}
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}
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}
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off() {
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this.canvas.style.touchAction = 'auto';
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this.canvas.style.msTouchAction = 'auto';
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this.canvas.style.userSelect = 'auto';
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this.canvas.removeEventListener('pointerdown', this._handlePointerDown);
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this.canvas.removeEventListener('mousedown', this._handleMouseDown);
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this.canvas.removeEventListener('touchstart', this._handleTouchStart);
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this._removeMoveUpEventListeners();
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}
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_getListenerFunctions() {
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var _a;
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const canvasWindow = window.document === this.canvas.ownerDocument
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? window
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: (_a = this.canvas.ownerDocument.defaultView) !== null && _a !== void 0 ? _a : this.canvas.ownerDocument;
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return {
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addEventListener: canvasWindow.addEventListener.bind(canvasWindow),
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removeEventListener: canvasWindow.removeEventListener.bind(canvasWindow),
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};
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}
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_removeMoveUpEventListeners() {
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const { removeEventListener } = this._getListenerFunctions();
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removeEventListener('pointermove', this._handlePointerMove);
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removeEventListener('pointerup', this._handlePointerUp);
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removeEventListener('mousemove', this._handleMouseMove);
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removeEventListener('mouseup', this._handleMouseUp);
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removeEventListener('touchmove', this._handleTouchMove);
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removeEventListener('touchend', this._handleTouchEnd);
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}
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isEmpty() {
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return this._isEmpty;
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}
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fromData(pointGroups, { clear = true } = {}) {
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if (clear) {
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this.clear();
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}
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this._fromData(pointGroups, this._drawCurve.bind(this), this._drawDot.bind(this));
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this._data = this._data.concat(pointGroups);
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}
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toData() {
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return this._data;
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}
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_isLeftButtonPressed(event, only) {
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if (only) {
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return event.buttons === 1;
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}
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return (event.buttons & 1) === 1;
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}
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_pointerEventToSignatureEvent(event) {
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return {
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event: event,
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type: event.type,
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x: event.clientX,
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y: event.clientY,
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pressure: 'pressure' in event ? event.pressure : 0,
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};
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}
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_touchEventToSignatureEvent(event) {
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const touch = event.changedTouches[0];
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return {
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event: event,
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type: event.type,
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x: touch.clientX,
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y: touch.clientY,
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pressure: touch.force,
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};
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}
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_getPointGroupOptions(group) {
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return {
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penColor: group && 'penColor' in group ? group.penColor : this.penColor,
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dotSize: group && 'dotSize' in group ? group.dotSize : this.dotSize,
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minWidth: group && 'minWidth' in group ? group.minWidth : this.minWidth,
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maxWidth: group && 'maxWidth' in group ? group.maxWidth : this.maxWidth,
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velocityFilterWeight: group && 'velocityFilterWeight' in group
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? group.velocityFilterWeight
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: this.velocityFilterWeight,
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compositeOperation: group && 'compositeOperation' in group
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? group.compositeOperation
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: this.compositeOperation,
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};
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}
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_strokeBegin(event) {
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const cancelled = !this.dispatchEvent(new CustomEvent('beginStroke', { detail: event, cancelable: true }));
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if (cancelled) {
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return;
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}
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const { addEventListener } = this._getListenerFunctions();
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switch (event.event.type) {
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case 'mousedown':
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addEventListener('mousemove', this._handleMouseMove);
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addEventListener('mouseup', this._handleMouseUp);
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break;
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case 'touchstart':
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addEventListener('touchmove', this._handleTouchMove);
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addEventListener('touchend', this._handleTouchEnd);
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break;
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case 'pointerdown':
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addEventListener('pointermove', this._handlePointerMove);
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addEventListener('pointerup', this._handlePointerUp);
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break;
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}
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this._drawingStroke = true;
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const pointGroupOptions = this._getPointGroupOptions();
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const newPointGroup = Object.assign(Object.assign({}, pointGroupOptions), { points: [] });
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this._data.push(newPointGroup);
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this._reset(pointGroupOptions);
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this._strokeUpdate(event);
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}
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_strokeUpdate(event) {
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if (!this._drawingStroke) {
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return;
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}
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if (this._data.length === 0) {
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this._strokeBegin(event);
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return;
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}
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this.dispatchEvent(new CustomEvent('beforeUpdateStroke', { detail: event }));
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const point = this._createPoint(event.x, event.y, event.pressure);
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const lastPointGroup = this._data[this._data.length - 1];
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const lastPoints = lastPointGroup.points;
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const lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
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const isLastPointTooClose = lastPoint
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? point.distanceTo(lastPoint) <= this.minDistance
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: false;
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const pointGroupOptions = this._getPointGroupOptions(lastPointGroup);
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if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
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const curve = this._addPoint(point, pointGroupOptions);
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if (!lastPoint) {
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this._drawDot(point, pointGroupOptions);
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}
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else if (curve) {
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this._drawCurve(curve, pointGroupOptions);
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}
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lastPoints.push({
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time: point.time,
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x: point.x,
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y: point.y,
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pressure: point.pressure,
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});
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}
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this.dispatchEvent(new CustomEvent('afterUpdateStroke', { detail: event }));
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}
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_strokeEnd(event, shouldUpdate = true) {
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this._removeMoveUpEventListeners();
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if (!this._drawingStroke) {
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return;
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}
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if (shouldUpdate) {
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this._strokeUpdate(event);
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}
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this._drawingStroke = false;
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this.dispatchEvent(new CustomEvent('endStroke', { detail: event }));
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}
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_handlePointerEvents() {
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this._drawingStroke = false;
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this.canvas.addEventListener('pointerdown', this._handlePointerDown);
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}
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_handleMouseEvents() {
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this._drawingStroke = false;
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this.canvas.addEventListener('mousedown', this._handleMouseDown);
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}
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_handleTouchEvents() {
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this.canvas.addEventListener('touchstart', this._handleTouchStart);
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}
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_reset(options) {
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this._lastPoints = [];
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this._lastVelocity = 0;
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this._lastWidth = (options.minWidth + options.maxWidth) / 2;
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this._ctx.fillStyle = options.penColor;
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this._ctx.globalCompositeOperation = options.compositeOperation;
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}
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_createPoint(x, y, pressure) {
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const rect = this.canvas.getBoundingClientRect();
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|
return new Point(x - rect.left, y - rect.top, pressure, new Date().getTime());
|
|
}
|
|
_addPoint(point, options) {
|
|
const { _lastPoints } = this;
|
|
_lastPoints.push(point);
|
|
if (_lastPoints.length > 2) {
|
|
if (_lastPoints.length === 3) {
|
|
_lastPoints.unshift(_lastPoints[0]);
|
|
}
|
|
const widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2], options);
|
|
const curve = Bezier.fromPoints(_lastPoints, widths);
|
|
_lastPoints.shift();
|
|
return curve;
|
|
}
|
|
return null;
|
|
}
|
|
_calculateCurveWidths(startPoint, endPoint, options) {
|
|
const velocity = options.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
|
|
(1 - options.velocityFilterWeight) * this._lastVelocity;
|
|
const newWidth = this._strokeWidth(velocity, options);
|
|
const widths = {
|
|
end: newWidth,
|
|
start: this._lastWidth,
|
|
};
|
|
this._lastVelocity = velocity;
|
|
this._lastWidth = newWidth;
|
|
return widths;
|
|
}
|
|
_strokeWidth(velocity, options) {
|
|
return Math.max(options.maxWidth / (velocity + 1), options.minWidth);
|
|
}
|
|
_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;
|
|
}
|
|
_drawCurve(curve, options) {
|
|
const ctx = this._ctx;
|
|
const widthDelta = curve.endWidth - curve.startWidth;
|
|
const drawSteps = Math.ceil(curve.length()) * 2;
|
|
ctx.beginPath();
|
|
ctx.fillStyle = options.penColor;
|
|
for (let i = 0; i < drawSteps; i += 1) {
|
|
const t = i / drawSteps;
|
|
const tt = t * t;
|
|
const ttt = tt * t;
|
|
const u = 1 - t;
|
|
const uu = u * u;
|
|
const uuu = uu * u;
|
|
let x = uuu * curve.startPoint.x;
|
|
x += 3 * uu * t * curve.control1.x;
|
|
x += 3 * u * tt * curve.control2.x;
|
|
x += ttt * curve.endPoint.x;
|
|
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;
|
|
const width = Math.min(curve.startWidth + ttt * widthDelta, options.maxWidth);
|
|
this._drawCurveSegment(x, y, width);
|
|
}
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
}
|
|
_drawDot(point, options) {
|
|
const ctx = this._ctx;
|
|
const width = options.dotSize > 0
|
|
? options.dotSize
|
|
: (options.minWidth + options.maxWidth) / 2;
|
|
ctx.beginPath();
|
|
this._drawCurveSegment(point.x, point.y, width);
|
|
ctx.closePath();
|
|
ctx.fillStyle = options.penColor;
|
|
ctx.fill();
|
|
}
|
|
_fromData(pointGroups, drawCurve, drawDot) {
|
|
for (const group of pointGroups) {
|
|
const { points } = group;
|
|
const pointGroupOptions = this._getPointGroupOptions(group);
|
|
if (points.length > 1) {
|
|
for (let j = 0; j < points.length; j += 1) {
|
|
const basicPoint = points[j];
|
|
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.pressure, basicPoint.time);
|
|
if (j === 0) {
|
|
this._reset(pointGroupOptions);
|
|
}
|
|
const curve = this._addPoint(point, pointGroupOptions);
|
|
if (curve) {
|
|
drawCurve(curve, pointGroupOptions);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
this._reset(pointGroupOptions);
|
|
drawDot(points[0], pointGroupOptions);
|
|
}
|
|
}
|
|
}
|
|
toSVG({ includeBackgroundColor = false } = {}) {
|
|
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('xmlns', 'http://www.w3.org/2000/svg');
|
|
svg.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
|
|
svg.setAttribute('viewBox', `${minX} ${minY} ${maxX} ${maxY}`);
|
|
svg.setAttribute('width', maxX.toString());
|
|
svg.setAttribute('height', maxY.toString());
|
|
if (includeBackgroundColor && this.backgroundColor) {
|
|
const rect = document.createElement('rect');
|
|
rect.setAttribute('width', '100%');
|
|
rect.setAttribute('height', '100%');
|
|
rect.setAttribute('fill', this.backgroundColor);
|
|
svg.appendChild(rect);
|
|
}
|
|
this._fromData(pointGroups, (curve, { penColor }) => {
|
|
const path = document.createElement('path');
|
|
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);
|
|
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
|
|
path.setAttribute('stroke', penColor);
|
|
path.setAttribute('fill', 'none');
|
|
path.setAttribute('stroke-linecap', 'round');
|
|
svg.appendChild(path);
|
|
}
|
|
}, (point, { penColor, dotSize, minWidth, maxWidth }) => {
|
|
const circle = document.createElement('circle');
|
|
const size = dotSize > 0 ? dotSize : (minWidth + maxWidth) / 2;
|
|
circle.setAttribute('r', size.toString());
|
|
circle.setAttribute('cx', point.x.toString());
|
|
circle.setAttribute('cy', point.y.toString());
|
|
circle.setAttribute('fill', penColor);
|
|
svg.appendChild(circle);
|
|
});
|
|
return svg.outerHTML;
|
|
}
|
|
}
|
|
|
|
return SignaturePad;
|
|
|
|
}));
|
|
//# sourceMappingURL=signature_pad.umd.js.map
|