/* eslint-disable new-cap, class-methods-use-this */ // Todo: Compare with latest canvg (add any improvements of ours) and add full JSDocs (denoting links to standard APIs and which are custom): https://github.com/canvg/canvg /** * canvg.js - Javascript SVG parser and renderer on Canvas * @module canvg * @license MIT * @author Gabe Lerner * @see https://github.com/canvg/canvg */ import RGBColor from './rgbcolor.js'; import {canvasRGBA} from '../external/stackblur-canvas/dist/stackblur-es.js'; /** * Whether a value is `null` or `undefined`. * @param {any} val * @returns {boolean} */ const isNullish = (val) => { return val === null || val === undefined; }; /** * @callback module:canvg.ForceRedraw * @returns {boolean} */ /** * @typedef {PlainObject} module:canvg.CanvgOptions * @property {boolean} ignoreMouse true => ignore mouse events * @property {boolean} ignoreAnimation true => ignore animations * @property {boolean} ignoreDimensions true => does not try to resize canvas * @property {boolean} ignoreClear true => does not clear canvas * @property {Integer} offsetX int => draws at a x offset * @property {Integer} offsetY int => draws at a y offset * @property {Integer} scaleWidth int => scales horizontally to width * @property {Integer} scaleHeight int => scales vertically to height * @property {module:canvg.ForceRedraw} forceRedraw function => will call the function on every frame, if it returns true, will redraw * @property {boolean} log Adds log function * @property {boolean} useCORS Whether to set CORS `crossOrigin` for the image to `Anonymous` */ /** * If called with no arguments, it will replace all `` elements on the page * with `` elements. * @function module:canvg.canvg * @param {HTMLCanvasElement|string} target canvas element or the id of a canvas element * @param {string|XMLDocument} s - svg string, url to svg file, or xml document * @param {module:canvg.CanvgOptions} [opts] Optional hash of options * @returns {Promise} All the function after the first render is completed with dom */ export const canvg = function (target, s, opts) { // no parameters if (isNullish(target) && isNullish(s) && isNullish(opts)) { const svgTags = document.querySelectorAll('svg'); return Promise.all([...svgTags].map((svgTag) => { const c = document.createElement('canvas'); c.width = svgTag.clientWidth; c.height = svgTag.clientHeight; svgTag.before(c); svgTag.remove(); const div = document.createElement('div'); div.append(svgTag); return canvg(c, div.innerHTML); })); } if (typeof target === 'string') { target = document.getElementById(target); } // store class on canvas if (!isNullish(target.svg)) target.svg.stop(); const svg = build(opts || {}); // on i.e. 8 for flash canvas, we can't assign the property so check for it if (!(target.childNodes.length === 1 && target.childNodes[0].nodeName === 'OBJECT')) { target.svg = svg; } const ctx = target.getContext('2d'); if (typeof s.documentElement !== 'undefined') { // load from xml doc return svg.loadXmlDoc(ctx, s); } if (s.substr(0, 1) === '<') { // load from xml string return svg.loadXml(ctx, s); } // load from url return svg.load(ctx, s); }; /* eslint-disable jsdoc/check-types */ /** * @param {module:canvg.CanvgOptions} opts * @returns {object} * @todo Flesh out exactly what object is returned here (after updating to latest and reincluding our changes here and those of StackBlur) */ function build (opts) { /* eslint-enable jsdoc/check-types */ const svg = {opts}; svg.FRAMERATE = 30; svg.MAX_VIRTUAL_PIXELS = 30000; svg.log = function (msg) { /* */ }; if (svg.opts.log === true && typeof console !== 'undefined') { svg.log = function (msg) { console.log(msg); }; // eslint-disable-line no-console } // globals svg.init = function (ctx) { let uniqueId = 0; svg.UniqueId = function () { uniqueId++; return 'canvg' + uniqueId; }; svg.Definitions = {}; svg.Styles = {}; svg.Animations = []; svg.Images = []; svg.ctx = ctx; svg.ViewPort = { viewPorts: [], Clear () { this.viewPorts = []; }, SetCurrent (width, height) { this.viewPorts.push({width, height}); }, RemoveCurrent () { this.viewPorts.pop(); }, Current () { return this.viewPorts[this.viewPorts.length - 1]; }, width () { return this.Current().width; }, height () { return this.Current().height; }, ComputeSize (d) { if (!isNullish(d) && typeof d === 'number') return d; if (d === 'x') return this.width(); if (d === 'y') return this.height(); return Math.sqrt( (this.width() ** 2) + (this.height() ** 2) ) / Math.sqrt(2); } }; }; svg.init(); // images loaded svg.ImagesLoaded = function () { return svg.Images.every((img) => img.loaded); }; // trim svg.trim = function (s) { return s.replace(/^\s+|\s+$/g, ''); }; // compress spaces svg.compressSpaces = function (s) { return s.replace(/\s+/gm, ' '); }; // ajax // Todo: Replace with `fetch` and polyfill svg.ajax = function (url, asynch) { const AJAX = window.XMLHttpRequest ? new XMLHttpRequest() : new window.ActiveXObject('Microsoft.XMLHTTP'); if (asynch) { return new Promise((resolve, reject) => { // eslint-disable-line promise/avoid-new const req = AJAX.open('GET', url, true); req.addEventListener('load', () => { resolve(AJAX.responseText); }); AJAX.send(null); }); } AJAX.open('GET', url, false); AJAX.send(null); return AJAX.responseText; }; // parse xml svg.parseXml = function (xml) { if (window.DOMParser) { const parser = new DOMParser(); return parser.parseFromString(xml, 'text/xml'); } xml = xml.replace(/]*>/, ''); const xmlDoc = new window.ActiveXObject('Microsoft.XMLDOM'); xmlDoc.async = 'false'; xmlDoc.loadXML(xml); return xmlDoc; }; // text extensions // get the text baseline const textBaselineMapping = { baseline: 'alphabetic', 'before-edge': 'top', 'text-before-edge': 'top', middle: 'middle', central: 'middle', 'after-edge': 'bottom', 'text-after-edge': 'bottom', ideographic: 'ideographic', alphabetic: 'alphabetic', hanging: 'hanging', mathematical: 'alphabetic' }; svg.Property = class Property { constructor (name, value) { this.name = name; this.value = value; } getValue () { return this.value; } hasValue () { return (!isNullish(this.value) && this.value !== ''); } // return the numerical value of the property numValue () { if (!this.hasValue()) return 0; let n = parseFloat(this.value); if (String(this.value).endsWith('%')) { n /= 100.0; } return n; } valueOrDefault (def) { if (this.hasValue()) return this.value; return def; } numValueOrDefault (def) { if (this.hasValue()) return this.numValue(); return def; } // color extensions // augment the current color value with the opacity addOpacity (opacityProp) { let newValue = this.value; if (!isNullish(opacityProp.value) && opacityProp.value !== '' && typeof this.value === 'string') { // can only add opacity to colors, not patterns const color = new RGBColor(this.value); if (color.ok) { newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacityProp.numValue() + ')'; } } return new svg.Property(this.name, newValue); } // definition extensions // get the definition from the definitions table getDefinition () { let name = this.value.match(/#([^)'"]+)/); if (name) { name = name[1]; } if (!name) { name = this.value; } return svg.Definitions[name]; } isUrlDefinition () { return this.value.startsWith('url('); } getFillStyleDefinition (e, opacityProp) { let def = this.getDefinition(); // gradient if (!isNullish(def) && def.createGradient) { return def.createGradient(svg.ctx, e, opacityProp); } // pattern if (!isNullish(def) && def.createPattern) { if (def.getHrefAttribute().hasValue()) { const pt = def.attribute('patternTransform'); def = def.getHrefAttribute().getDefinition(); if (pt.hasValue()) { def.attribute('patternTransform', true).value = pt.value; } } return def.createPattern(svg.ctx, e); } return null; } // length extensions getDPI (viewPort) { return 96.0; // TODO: compute? } getEM (viewPort) { let em = 12; const fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize); if (fontSize.hasValue()) em = fontSize.toPixels(viewPort); return em; } getUnits () { return String(this.value).replace(/[\d.-]/g, ''); } // get the length as pixels toPixels (viewPort, processPercent) { if (!this.hasValue()) return 0; const s = String(this.value); if (s.endsWith('em')) return this.numValue() * this.getEM(viewPort); if (s.endsWith('ex')) return this.numValue() * this.getEM(viewPort) / 2.0; if (s.endsWith('px')) return this.numValue(); if (s.endsWith('pt')) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0); if (s.endsWith('pc')) return this.numValue() * 15; if (s.endsWith('cm')) return this.numValue() * this.getDPI(viewPort) / 2.54; if (s.endsWith('mm')) return this.numValue() * this.getDPI(viewPort) / 25.4; if (s.endsWith('in')) return this.numValue() * this.getDPI(viewPort); if (s.endsWith('%')) return this.numValue() * svg.ViewPort.ComputeSize(viewPort); const n = this.numValue(); if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort); return n; } // time extensions // get the time as milliseconds toMilliseconds () { if (!this.hasValue()) return 0; const s = String(this.value); if (s.endsWith('ms')) return this.numValue(); if (s.endsWith('s')) return this.numValue() * 1000; return this.numValue(); } // angle extensions // get the angle as radians toRadians () { if (!this.hasValue()) return 0; const s = String(this.value); if (s.endsWith('deg')) return this.numValue() * (Math.PI / 180.0); if (s.endsWith('grad')) return this.numValue() * (Math.PI / 200.0); if (s.endsWith('rad')) return this.numValue(); return this.numValue() * (Math.PI / 180.0); } toTextBaseline () { if (!this.hasValue()) return null; return textBaselineMapping[this.value]; } }; // fonts svg.Font = { Styles: 'normal|italic|oblique|inherit', Variants: 'normal|small-caps|inherit', Weights: 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit', CreateFont (fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) { const f = !isNullish(inherit) ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font); return { fontFamily: fontFamily || f.fontFamily, fontSize: fontSize || f.fontSize, fontStyle: fontStyle || f.fontStyle, fontWeight: fontWeight || f.fontWeight, fontVariant: fontVariant || f.fontVariant, toString () { return [ this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily ].join(' '); } }; }, Parse (s) { const f = {}; const ds = svg.trim(svg.compressSpaces(s || '')).split(' '); const set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false }; let ff = ''; ds.forEach((d) => { if (!set.fontStyle && this.Styles.includes(d)) { if (d !== 'inherit') { f.fontStyle = d; } set.fontStyle = true; } else if (!set.fontVariant && this.Variants.includes(d)) { if (d !== 'inherit') { f.fontVariant = d; } set.fontStyle = set.fontVariant = true; } else if (!set.fontWeight && this.Weights.includes(d)) { if (d !== 'inherit') { f.fontWeight = d; } set.fontStyle = set.fontVariant = set.fontWeight = true; } else if (!set.fontSize) { if (d !== 'inherit') { f.fontSize = d.split('/')[0]; } set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true; } else if (d !== 'inherit') { ff += d; } }); if (ff !== '') { f.fontFamily = ff; } return f; } }; // points and paths svg.ToNumberArray = function (s) { const a = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' '); return a.map((_a) => parseFloat(_a)); }; svg.Point = class { constructor (x, y) { this.x = x; this.y = y; } angleTo (p) { return Math.atan2(p.y - this.y, p.x - this.x); } applyTransform (v) { const xp = this.x * v[0] + this.y * v[2] + v[4]; const yp = this.x * v[1] + this.y * v[3] + v[5]; this.x = xp; this.y = yp; } }; svg.CreatePoint = function (s) { const a = svg.ToNumberArray(s); return new svg.Point(a[0], a[1]); }; svg.CreatePath = function (s) { const a = svg.ToNumberArray(s); const path = []; for (let i = 0; i < a.length; i += 2) { path.push(new svg.Point(a[i], a[i + 1])); } return path; }; // bounding box svg.BoundingBox = class { constructor (x1, y1, x2, y2) { // pass in initial points if you want this.x1 = Number.NaN; this.y1 = Number.NaN; this.x2 = Number.NaN; this.y2 = Number.NaN; this.addPoint(x1, y1); this.addPoint(x2, y2); } x () { return this.x1; } y () { return this.y1; } width () { return this.x2 - this.x1; } height () { return this.y2 - this.y1; } addPoint (x, y) { if (!isNullish(x)) { if (isNaN(this.x1) || isNaN(this.x2)) { this.x1 = x; this.x2 = x; } if (x < this.x1) this.x1 = x; if (x > this.x2) this.x2 = x; } if (!isNullish(y)) { if (isNaN(this.y1) || isNaN(this.y2)) { this.y1 = y; this.y2 = y; } if (y < this.y1) this.y1 = y; if (y > this.y2) this.y2 = y; } } addX (x) { this.addPoint(x, null); } addY (y) { this.addPoint(null, y); } addBoundingBox (bb) { this.addPoint(bb.x1, bb.y1); this.addPoint(bb.x2, bb.y2); } addQuadraticCurve (p0x, p0y, p1x, p1y, p2x, p2y) { const cp1x = p0x + 2 / 3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0) const cp1y = p0y + 2 / 3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0) const cp2x = cp1x + 1 / 3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0) const cp2y = cp1y + 1 / 3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0) this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y); } addBezierCurve (p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) { // from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html const p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y]; this.addPoint(p0[0], p0[1]); this.addPoint(p3[0], p3[1]); for (let i = 0; i <= 1; i++) { const f = function (t) { return ((1 - t) ** 3) * p0[i] + 3 * ((1 - t) ** 2) * t * p1[i] + 3 * (1 - t) * (t ** 2) * p2[i] + (t ** 3) * p3[i]; }; const b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i]; const a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i]; const c = 3 * p1[i] - 3 * p0[i]; if (a === 0) { if (b === 0) continue; const t = -c / b; if (t > 0 && t < 1) { if (i === 0) this.addX(f(t)); if (i === 1) this.addY(f(t)); } continue; } const b2ac = (b ** 2) - 4 * c * a; if (b2ac < 0) continue; const t1 = (-b + Math.sqrt(b2ac)) / (2 * a); if (t1 > 0 && t1 < 1) { if (i === 0) this.addX(f(t1)); if (i === 1) this.addY(f(t1)); } const t2 = (-b - Math.sqrt(b2ac)) / (2 * a); if (t2 > 0 && t2 < 1) { if (i === 0) this.addX(f(t2)); if (i === 1) this.addY(f(t2)); } } } isPointInBox (x, y) { return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2); } }; // transforms svg.Transform = class { constructor (v) { this.Type = { translate: class { constructor (s) { this.p = svg.CreatePoint(s); this.apply = function (ctx) { ctx.translate(this.p.x || 0.0, this.p.y || 0.0); }; this.unapply = function (ctx) { ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0); }; this.applyToPoint = function (p) { p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]); }; } }, rotate: class { constructor (s) { const a = svg.ToNumberArray(s); this.angle = new svg.Property('angle', a[0]); this.cx = a[1] || 0; this.cy = a[2] || 0; this.apply = function (ctx) { ctx.translate(this.cx, this.cy); ctx.rotate(this.angle.toRadians()); ctx.translate(-this.cx, -this.cy); }; this.unapply = function (ctx) { ctx.translate(this.cx, this.cy); ctx.rotate(-1.0 * this.angle.toRadians()); ctx.translate(-this.cx, -this.cy); }; this.applyToPoint = function (p) { const _a = this.angle.toRadians(); p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]); p.applyTransform([Math.cos(_a), Math.sin(_a), -Math.sin(_a), Math.cos(_a), 0, 0]); p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]); }; } }, scale: class { constructor (s) { this.p = svg.CreatePoint(s); this.apply = function (ctx) { ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0); }; this.unapply = function (ctx) { ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0); }; this.applyToPoint = function (p) { p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]); }; } }, matrix: class { constructor (s) { this.m = svg.ToNumberArray(s); this.apply = function (ctx) { ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]); }; this.applyToPoint = function (p) { p.applyTransform(this.m); }; } } }; Object.assign(this.Type, { SkewBase: class extends this.Type.matrix { constructor (s) { super(s); this.angle = new svg.Property('angle', s); } } }); Object.assign(this.Type, { skewX: class extends this.Type.SkewBase { constructor (s) { super(s); this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0]; } }, skewY: class extends this.Type.SkewBase { constructor (s) { super(s); this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0]; } } }); const data = svg.trim(svg.compressSpaces(v)).replace(/\)([a-zA-Z])/g, ') $1').replace(/\)(\s?,\s?)/g, ') ').split(/\s(?=[a-z])/); this.transforms = data.map((d) => { const type = svg.trim(d.split('(')[0]); const s = d.split('(')[1].replace(')', ''); const transform = new this.Type[type](s); transform.type = type; return transform; }); } apply (ctx) { this.transforms.forEach((transform) => { transform.apply(ctx); }); } unapply (ctx) { for (let i = this.transforms.length - 1; i >= 0; i--) { this.transforms[i].unapply(ctx); } } applyToPoint (p) { this.transforms.forEach((transform) => { transform.applyToPoint(p); }); } }; // aspect ratio svg.AspectRatio = function (ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) { // aspect ratio - https://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute aspectRatio = svg.compressSpaces(aspectRatio); aspectRatio = aspectRatio.replace(/^defer\s/, ''); // ignore defer const align = aspectRatio.split(' ')[0] || 'xMidYMid'; const meetOrSlice = aspectRatio.split(' ')[1] || 'meet'; // calculate scale const scaleX = width / desiredWidth; const scaleY = height / desiredHeight; const scaleMin = Math.min(scaleX, scaleY); const scaleMax = Math.max(scaleX, scaleY); if (meetOrSlice === 'meet') { desiredWidth *= scaleMin; desiredHeight *= scaleMin; } if (meetOrSlice === 'slice') { desiredWidth *= scaleMax; desiredHeight *= scaleMax; } refX = new svg.Property('refX', refX); refY = new svg.Property('refY', refY); if (refX.hasValue() && refY.hasValue()) { ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y')); } else { // align if (align.startsWith('xMid') && ((meetOrSlice === 'meet' && scaleMin === scaleY) || (meetOrSlice === 'slice' && scaleMax === scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0); if (align.endsWith('YMid') && ((meetOrSlice === 'meet' && scaleMin === scaleX) || (meetOrSlice === 'slice' && scaleMax === scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0); if (align.startsWith('xMax') && ((meetOrSlice === 'meet' && scaleMin === scaleY) || (meetOrSlice === 'slice' && scaleMax === scaleY))) ctx.translate(width - desiredWidth, 0); if (align.endsWith('YMax') && ((meetOrSlice === 'meet' && scaleMin === scaleX) || (meetOrSlice === 'slice' && scaleMax === scaleX))) ctx.translate(0, height - desiredHeight); } // scale if (align === 'none') ctx.scale(scaleX, scaleY); else if (meetOrSlice === 'meet') ctx.scale(scaleMin, scaleMin); else if (meetOrSlice === 'slice') ctx.scale(scaleMax, scaleMax); // translate ctx.translate(isNullish(minX) ? 0 : -minX, isNullish(minY) ? 0 : -minY); }; // elements svg.Element = {}; svg.EmptyProperty = new svg.Property('EMPTY', ''); svg.Element.ElementBase = class { constructor (node) { // Argument from inheriting class this.captureTextNodes = arguments[1]; // eslint-disable-line prefer-rest-params this.attributes = {}; this.styles = {}; this.children = []; if (!isNullish(node) && node.nodeType === 1) { // ELEMENT_NODE // add children [...node.childNodes].forEach((childNode) => { if (childNode.nodeType === 1) { this.addChild(childNode, true); // ELEMENT_NODE } if (this.captureTextNodes && ( childNode.nodeType === 3 || childNode.nodeType === 4 )) { const text = childNode.nodeValue || childNode.text || ''; if (svg.trim(svg.compressSpaces(text)) !== '') { this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE } } }); // add attributes [...node.attributes].forEach(({nodeName, nodeValue}) => { this.attributes[nodeName] = new svg.Property( nodeName, nodeValue ); }); // add tag styles let styles = svg.Styles[node.nodeName]; if (!isNullish(styles)) { Object.entries(styles).forEach(([name, styleValue]) => { this.styles[name] = styleValue; }); } // add class styles if (this.attribute('class').hasValue()) { const classes = svg.compressSpaces(this.attribute('class').value).split(' '); classes.forEach((clss) => { styles = svg.Styles['.' + clss]; if (!isNullish(styles)) { Object.entries(styles).forEach(([name, styleValue]) => { this.styles[name] = styleValue; }); } styles = svg.Styles[node.nodeName + '.' + clss]; if (!isNullish(styles)) { Object.entries(styles).forEach(([name, styleValue]) => { this.styles[name] = styleValue; }); } }); } // add id styles if (this.attribute('id').hasValue()) { const _styles = svg.Styles['#' + this.attribute('id').value]; if (!isNullish(_styles)) { Object.entries(_styles).forEach(([name, styleValue]) => { this.styles[name] = styleValue; }); } } // add inline styles if (this.attribute('style').hasValue()) { const _styles = this.attribute('style').value.split(';'); _styles.forEach((style) => { if (svg.trim(style) !== '') { let {name, value} = style.split(':'); name = svg.trim(name); value = svg.trim(value); this.styles[name] = new svg.Property(name, value); } }); } // add id if (this.attribute('id').hasValue()) { if (isNullish(svg.Definitions[this.attribute('id').value])) { svg.Definitions[this.attribute('id').value] = this; } } } } // get or create attribute attribute (name, createIfNotExists) { let a = this.attributes[name]; if (!isNullish(a)) return a; if (createIfNotExists === true) { a = new svg.Property(name, ''); this.attributes[name] = a; } return a || svg.EmptyProperty; } getHrefAttribute () { for (const a in this.attributes) { if (a.endsWith(':href')) { return this.attributes[a]; } } return svg.EmptyProperty; } // get or create style, crawls up node tree style (name, createIfNotExists, skipAncestors) { let s = this.styles[name]; if (!isNullish(s)) return s; const a = this.attribute(name); if (!isNullish(a) && a.hasValue()) { this.styles[name] = a; // move up to me to cache return a; } if (skipAncestors !== true) { const p = this.parent; if (!isNullish(p)) { const ps = p.style(name); if (!isNullish(ps) && ps.hasValue()) { return ps; } } } if (createIfNotExists === true) { s = new svg.Property(name, ''); this.styles[name] = s; } return s || svg.EmptyProperty; } // base render render (ctx) { // don't render display=none if (this.style('display').value === 'none') return; // don't render visibility=hidden if (this.style('visibility').value === 'hidden') return; ctx.save(); if (this.attribute('mask').hasValue()) { // mask const mask = this.attribute('mask').getDefinition(); if (!isNullish(mask)) mask.apply(ctx, this); } else if (this.style('filter').hasValue()) { // filter const filter = this.style('filter').getDefinition(); if (!isNullish(filter)) filter.apply(ctx, this); } else { this.setContext(ctx); this.renderChildren(ctx); this.clearContext(ctx); } ctx.restore(); } // base set context setContext (ctx) { // OVERRIDE ME! } // base clear context clearContext (ctx) { // OVERRIDE ME! } // base render children renderChildren (ctx) { this.children.forEach((child) => { child.render(ctx); }); } addChild (childNode, create) { const child = create ? svg.CreateElement(childNode) : childNode; child.parent = this; if (child.type !== 'title') { this.children.push(child); } } }; svg.Element.RenderedElementBase = class extends svg.Element.ElementBase { setContext (ctx) { // fill if (this.style('fill').isUrlDefinition()) { const fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity')); if (!isNullish(fs)) ctx.fillStyle = fs; } else if (this.style('fill').hasValue()) { const fillStyle = this.style('fill'); if (fillStyle.value === 'currentColor') fillStyle.value = this.style('color').value; ctx.fillStyle = (fillStyle.value === 'none' ? 'rgba(0,0,0,0)' : fillStyle.value); } if (this.style('fill-opacity').hasValue()) { let fillStyle = new svg.Property('fill', ctx.fillStyle); fillStyle = fillStyle.addOpacity(this.style('fill-opacity')); ctx.fillStyle = fillStyle.value; } // stroke if (this.style('stroke').isUrlDefinition()) { const fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity')); if (!isNullish(fs)) ctx.strokeStyle = fs; } else if (this.style('stroke').hasValue()) { const strokeStyle = this.style('stroke'); if (strokeStyle.value === 'currentColor') strokeStyle.value = this.style('color').value; ctx.strokeStyle = (strokeStyle.value === 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value); } if (this.style('stroke-opacity').hasValue()) { let strokeStyle = new svg.Property('stroke', ctx.strokeStyle); strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity')); ctx.strokeStyle = strokeStyle.value; } if (this.style('stroke-width').hasValue()) { const newLineWidth = this.style('stroke-width').toPixels(); ctx.lineWidth = newLineWidth === 0 ? 0.001 : newLineWidth; // browsers don't respect 0 } if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value; if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value; if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value; if (this.style('stroke-dasharray').hasValue() && this.style('stroke-dasharray').value !== 'none') { const gaps = svg.ToNumberArray(this.style('stroke-dasharray').value); if (typeof ctx.setLineDash !== 'undefined') { ctx.setLineDash(gaps); } else if (typeof ctx.webkitLineDash !== 'undefined') { ctx.webkitLineDash = gaps; } else if (typeof ctx.mozDash !== 'undefined' && !(gaps.length === 1 && gaps[0] === 0)) { ctx.mozDash = gaps; } const offset = this.style('stroke-dashoffset').numValueOrDefault(1); if (typeof ctx.lineDashOffset !== 'undefined') { ctx.lineDashOffset = offset; } else if (typeof ctx.webkitLineDashOffset !== 'undefined') { ctx.webkitLineDashOffset = offset; } else if (typeof ctx.mozDashOffset !== 'undefined') { ctx.mozDashOffset = offset; } } // font if (typeof ctx.font !== 'undefined') { ctx.font = svg.Font.CreateFont( this.style('font-style').value, this.style('font-variant').value, this.style('font-weight').value, this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '', this.style('font-family').value ).toString(); } // transform if (this.attribute('transform').hasValue()) { const transform = new svg.Transform(this.attribute('transform').value); transform.apply(ctx); } // clip if (this.style('clip-path', false, true).hasValue()) { const clip = this.style('clip-path', false, true).getDefinition(); if (!isNullish(clip)) clip.apply(ctx); } // opacity if (this.style('opacity').hasValue()) { ctx.globalAlpha = this.style('opacity').numValue(); } } }; svg.Element.PathElementBase = class extends svg.Element.RenderedElementBase { path (ctx) { if (!isNullish(ctx)) ctx.beginPath(); return new svg.BoundingBox(); } renderChildren (ctx) { this.path(ctx); svg.Mouse.checkPath(this, ctx); if (ctx.fillStyle !== '') { if (this.style('fill-rule').valueOrDefault('inherit') !== 'inherit') { ctx.fill(this.style('fill-rule').value); } else { ctx.fill(); } } if (ctx.strokeStyle !== '') ctx.stroke(); const markers = this.getMarkers(); if (!isNullish(markers)) { if (this.style('marker-start').isUrlDefinition()) { const marker = this.style('marker-start').getDefinition(); marker.render(ctx, markers[0][0], markers[0][1]); } if (this.style('marker-mid').isUrlDefinition()) { const marker = this.style('marker-mid').getDefinition(); for (let i = 1; i < markers.length - 1; i++) { marker.render(ctx, markers[i][0], markers[i][1]); } } if (this.style('marker-end').isUrlDefinition()) { const marker = this.style('marker-end').getDefinition(); marker.render(ctx, markers[markers.length - 1][0], markers[markers.length - 1][1]); } } } getBoundingBox () { return this.path(); } getMarkers () { return null; } }; // svg element svg.Element.svg = class extends svg.Element.RenderedElementBase { clearContext (ctx) { super.clearContext(ctx); svg.ViewPort.RemoveCurrent(); } setContext (ctx) { // initial values and defaults ctx.strokeStyle = 'rgba(0,0,0,0)'; ctx.lineCap = 'butt'; ctx.lineJoin = 'miter'; ctx.miterLimit = 4; if (typeof ctx.font !== 'undefined' && typeof window.getComputedStyle !== 'undefined') { ctx.font = window.getComputedStyle(ctx.canvas).getPropertyValue('font'); } super.setContext(ctx); // create new view port if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0; if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0; ctx.translate(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y')); let width = svg.ViewPort.width(); let height = svg.ViewPort.height(); if (!this.attribute('width').hasValue()) this.attribute('width', true).value = '100%'; if (!this.attribute('height').hasValue()) this.attribute('height', true).value = '100%'; if (typeof this.root === 'undefined') { width = this.attribute('width').toPixels('x'); height = this.attribute('height').toPixels('y'); let x = 0; let y = 0; if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) { x = -this.attribute('refX').toPixels('x'); y = -this.attribute('refY').toPixels('y'); } if (this.attribute('overflow').valueOrDefault('hidden') !== 'visible') { ctx.beginPath(); ctx.moveTo(x, y); ctx.lineTo(width, y); ctx.lineTo(width, height); ctx.lineTo(x, height); ctx.closePath(); ctx.clip(); } } svg.ViewPort.SetCurrent(width, height); // viewbox if (this.attribute('viewBox').hasValue()) { const viewBox = svg.ToNumberArray(this.attribute('viewBox').value); const minX = viewBox[0]; const minY = viewBox[1]; width = viewBox[2]; height = viewBox[3]; svg.AspectRatio( ctx, this.attribute('preserveAspectRatio').value, svg.ViewPort.width(), width, svg.ViewPort.height(), height, minX, minY, this.attribute('refX').value, this.attribute('refY').value ); svg.ViewPort.RemoveCurrent(); svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]); } } }; // rect element svg.Element.rect = class extends svg.Element.PathElementBase { path (ctx) { const x = this.attribute('x').toPixels('x'); const y = this.attribute('y').toPixels('y'); const width = this.attribute('width').toPixels('x'); const height = this.attribute('height').toPixels('y'); let rx = this.attribute('rx').toPixels('x'); let ry = this.attribute('ry').toPixels('y'); if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx; if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry; rx = Math.min(rx, width / 2.0); ry = Math.min(ry, height / 2.0); if (!isNullish(ctx)) { ctx.beginPath(); ctx.moveTo(x + rx, y); ctx.lineTo(x + width - rx, y); ctx.quadraticCurveTo(x + width, y, x + width, y + ry); ctx.lineTo(x + width, y + height - ry); ctx.quadraticCurveTo(x + width, y + height, x + width - rx, y + height); ctx.lineTo(x + rx, y + height); ctx.quadraticCurveTo(x, y + height, x, y + height - ry); ctx.lineTo(x, y + ry); ctx.quadraticCurveTo(x, y, x + rx, y); ctx.closePath(); } return new svg.BoundingBox(x, y, x + width, y + height); } }; // circle element svg.Element.circle = class extends svg.Element.PathElementBase { path (ctx) { const cx = this.attribute('cx').toPixels('x'); const cy = this.attribute('cy').toPixels('y'); const r = this.attribute('r').toPixels(); if (!isNullish(ctx)) { ctx.beginPath(); ctx.arc(cx, cy, r, 0, Math.PI * 2, true); ctx.closePath(); } return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r); } }; // ellipse element const KAPPA = 4 * ((Math.sqrt(2) - 1) / 3); svg.Element.ellipse = class extends svg.Element.PathElementBase { path (ctx) { const rx = this.attribute('rx').toPixels('x'); const ry = this.attribute('ry').toPixels('y'); const cx = this.attribute('cx').toPixels('x'); const cy = this.attribute('cy').toPixels('y'); if (!isNullish(ctx)) { ctx.beginPath(); ctx.moveTo(cx, cy - ry); ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy); ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry); ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy); ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry); ctx.closePath(); } return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry); } }; // line element svg.Element.line = class extends svg.Element.PathElementBase { getPoints () { return [ new svg.Point(this.attribute('x1').toPixels('x'), this.attribute('y1').toPixels('y')), new svg.Point(this.attribute('x2').toPixels('x'), this.attribute('y2').toPixels('y')) ]; } path (ctx) { const points = this.getPoints(); if (!isNullish(ctx)) { ctx.beginPath(); ctx.moveTo(points[0].x, points[0].y); ctx.lineTo(points[1].x, points[1].y); } return new svg.BoundingBox(points[0].x, points[0].y, points[1].x, points[1].y); } getMarkers () { const points = this.getPoints(); const a = points[0].angleTo(points[1]); return [[points[0], a], [points[1], a]]; } }; // polyline element svg.Element.polyline = class extends svg.Element.PathElementBase { constructor (node) { super(node); this.points = svg.CreatePath(this.attribute('points').value); } path (ctx) { const {x, y} = this.points[0]; const bb = new svg.BoundingBox(x, y); if (!isNullish(ctx)) { ctx.beginPath(); ctx.moveTo(x, y); } for (let i = 1; i < this.points.length; i++) { const {x: _x, y: _y} = this.points[i]; bb.addPoint(_x, _y); if (!isNullish(ctx)) ctx.lineTo(_x, _y); } return bb; } getMarkers () { const markers = []; for (let i = 0; i < this.points.length - 1; i++) { markers.push([this.points[i], this.points[i].angleTo(this.points[i + 1])]); } markers.push([this.points[this.points.length - 1], markers[markers.length - 1][1]]); return markers; } }; // polygon element svg.Element.polygon = class extends svg.Element.polyline { path (ctx) { const bb = super.path(ctx); if (!isNullish(ctx)) { ctx.lineTo(this.points[0].x, this.points[0].y); ctx.closePath(); } return bb; } }; // path element svg.Element.path = class extends svg.Element.PathElementBase { constructor (node) { super(node); let d = this.attribute('d').value // TODO: convert to real lexer based on https://www.w3.org/TR/SVG11/paths.html#PathDataBNF .replace(/,/gm, ' ') // get rid of all commas .replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2') // separate commands from commands .replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2') // separate commands from commands .replace(/([MmZzLlHhVvCcSsQqTtAa])(\S)/gm, '$1 $2') // separate commands from points .replace(/(\S)([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2') // separate commands from points .replace(/(\d)([+-])/gm, '$1 $2') // separate digits when no comma .replace(/(\.\d*)(\.)/gm, '$1 $2') // separate digits when no comma .replace(/([Aa](\s+\d+)(\s+\d+)(\s+\d+))\s+([01])\s*([01])/gm, '$1 $5 $6 '); // shorthand elliptical arc path syntax d = svg.compressSpaces(d); // compress multiple spaces d = svg.trim(d); this.PathParser = { tokens: d.split(' '), reset () { this.i = -1; this.command = ''; this.previousCommand = ''; this.start = new svg.Point(0, 0); this.control = new svg.Point(0, 0); this.current = new svg.Point(0, 0); this.points = []; this.angles = []; }, isEnd () { return this.i >= this.tokens.length - 1; }, isCommandOrEnd () { if (this.isEnd()) return true; return !isNullish(this.tokens[this.i + 1].match(/^[A-Za-z]$/)); }, isRelativeCommand () { switch (this.command) { case 'm': case 'l': case 'h': case 'v': case 'c': case 's': case 'q': case 't': case 'a': case 'z': return true; } return false; }, getToken () { this.i++; return this.tokens[this.i]; }, getScalar () { return parseFloat(this.getToken()); }, nextCommand () { this.previousCommand = this.command; this.command = this.getToken(); }, getPoint () { const p = new svg.Point(this.getScalar(), this.getScalar()); return this.makeAbsolute(p); }, getAsControlPoint () { const p = this.getPoint(); this.control = p; return p; }, getAsCurrentPoint () { const p = this.getPoint(); this.current = p; return p; }, getReflectedControlPoint () { if (this.previousCommand.toLowerCase() !== 'c' && this.previousCommand.toLowerCase() !== 's' && this.previousCommand.toLowerCase() !== 'q' && this.previousCommand.toLowerCase() !== 't') { return this.current; } // reflect point const p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y); return p; }, makeAbsolute (p) { if (this.isRelativeCommand()) { p.x += this.current.x; p.y += this.current.y; } return p; }, addMarker (p, from, priorTo) { // if the last angle isn't filled in because we didn't have this point yet ... if (!isNullish(priorTo) && this.angles.length > 0 && isNullish(this.angles[this.angles.length - 1])) { this.angles[this.angles.length - 1] = this.points[this.points.length - 1].angleTo(priorTo); } this.addMarkerAngle(p, isNullish(from) ? null : from.angleTo(p)); }, addMarkerAngle (p, a) { this.points.push(p); this.angles.push(a); }, getMarkerPoints () { return this.points; }, getMarkerAngles () { for (let i = 0; i < this.angles.length; i++) { if (isNullish(this.angles[i])) { for (let j = i + 1; j < this.angles.length; j++) { if (!isNullish(this.angles[j])) { this.angles[i] = this.angles[j]; break; } } } } return this.angles; } }; } path (ctx) { const pp = this.PathParser; pp.reset(); const bb = new svg.BoundingBox(); if (!isNullish(ctx)) ctx.beginPath(); while (!pp.isEnd()) { pp.nextCommand(); switch (pp.command) { case 'M': case 'm': { const p = pp.getAsCurrentPoint(); pp.addMarker(p); bb.addPoint(p.x, p.y); if (!isNullish(ctx)) ctx.moveTo(p.x, p.y); pp.start = pp.current; while (!pp.isCommandOrEnd()) { const _p = pp.getAsCurrentPoint(); pp.addMarker(_p, pp.start); bb.addPoint(_p.x, _p.y); if (!isNullish(ctx)) ctx.lineTo(_p.x, _p.y); } break; } case 'L': case 'l': while (!pp.isCommandOrEnd()) { const c = pp.current; const p = pp.getAsCurrentPoint(); pp.addMarker(p, c); bb.addPoint(p.x, p.y); if (!isNullish(ctx)) ctx.lineTo(p.x, p.y); } break; case 'H': case 'h': while (!pp.isCommandOrEnd()) { const newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(), pp.current.y); pp.addMarker(newP, pp.current); pp.current = newP; bb.addPoint(pp.current.x, pp.current.y); if (!isNullish(ctx)) ctx.lineTo(pp.current.x, pp.current.y); } break; case 'V': case 'v': while (!pp.isCommandOrEnd()) { const newP = new svg.Point(pp.current.x, (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar()); pp.addMarker(newP, pp.current); pp.current = newP; bb.addPoint(pp.current.x, pp.current.y); if (!isNullish(ctx)) ctx.lineTo(pp.current.x, pp.current.y); } break; case 'C': case 'c': while (!pp.isCommandOrEnd()) { const curr = pp.current; const p1 = pp.getPoint(); const cntrl = pp.getAsControlPoint(); const cp = pp.getAsCurrentPoint(); pp.addMarker(cp, cntrl, p1); bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y); if (!isNullish(ctx)) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y); } break; case 'S': case 's': while (!pp.isCommandOrEnd()) { const curr = pp.current; const p1 = pp.getReflectedControlPoint(); const cntrl = pp.getAsControlPoint(); const cp = pp.getAsCurrentPoint(); pp.addMarker(cp, cntrl, p1); bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y); if (!isNullish(ctx)) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y); } break; case 'Q': case 'q': while (!pp.isCommandOrEnd()) { const curr = pp.current; const cntrl = pp.getAsControlPoint(); const cp = pp.getAsCurrentPoint(); pp.addMarker(cp, cntrl, cntrl); bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y); if (!isNullish(ctx)) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y); } break; case 'T': case 't': while (!pp.isCommandOrEnd()) { const curr = pp.current; const cntrl = pp.getReflectedControlPoint(); pp.control = cntrl; const cp = pp.getAsCurrentPoint(); pp.addMarker(cp, cntrl, cntrl); bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y); if (!isNullish(ctx)) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y); } break; case 'A': case 'a': while (!pp.isCommandOrEnd()) { const curr = pp.current; let rx = pp.getScalar(); let ry = pp.getScalar(); const xAxisRotation = pp.getScalar() * (Math.PI / 180.0); const largeArcFlag = pp.getScalar(); const sweepFlag = pp.getScalar(); const cp = pp.getAsCurrentPoint(); // Conversion from endpoint to center parameterization // https://www.w3.org/TR/SVG11/implnote.html#ArcConversionEndpointToCenter // x1', y1' const currp = new svg.Point( Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0, -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0 ); // adjust radii const l = (currp.x ** 2) / (rx ** 2) + (currp.y ** 2) / (ry ** 2); if (l > 1) { rx *= Math.sqrt(l); ry *= Math.sqrt(l); } // cx', cy' let s = (largeArcFlag === sweepFlag ? -1 : 1) * Math.sqrt( (((rx ** 2) * (ry ** 2)) - ((rx ** 2) * (currp.y ** 2)) - ((ry ** 2) * (currp.x ** 2))) / ((rx ** 2) * (currp.y ** 2) + (ry ** 2) * (currp.x ** 2)) ); if (isNaN(s)) s = 0; const cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx); // cx, cy const centp = new svg.Point( (curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y, (curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y ); // vector magnitude const m = function (v) { return Math.sqrt((v[0] ** 2) + (v[1] ** 2)); }; // ratio between two vectors const r = function (u, v) { return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v)); }; // angle between two vectors const a = function (u, v) { return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v)); }; // initial angle const a1 = a([1, 0], [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]); // angle delta const u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]; const v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry]; let ad = a(u, v); if (r(u, v) <= -1) ad = Math.PI; if (r(u, v) >= 1) ad = 0; // for markers const dir = 1 - sweepFlag ? 1.0 : -1.0; const ah = a1 + dir * (ad / 2.0); const halfWay = new svg.Point( centp.x + rx * Math.cos(ah), centp.y + ry * Math.sin(ah) ); pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2); pp.addMarkerAngle(cp, ah - dir * Math.PI); bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better if (!isNullish(ctx)) { const _r = rx > ry ? rx : ry; const sx = rx > ry ? 1 : rx / ry; const sy = rx > ry ? ry / rx : 1; ctx.translate(centp.x, centp.y); ctx.rotate(xAxisRotation); ctx.scale(sx, sy); ctx.arc(0, 0, _r, a1, a1 + ad, 1 - sweepFlag); ctx.scale(1 / sx, 1 / sy); ctx.rotate(-xAxisRotation); ctx.translate(-centp.x, -centp.y); } } break; case 'Z': case 'z': if (!isNullish(ctx)) ctx.closePath(); pp.current = pp.start; } } return bb; } getMarkers () { const points = this.PathParser.getMarkerPoints(); const angles = this.PathParser.getMarkerAngles(); const markers = points.map((point, i) => { return [point, angles[i]]; }); return markers; } }; // pattern element svg.Element.pattern = class extends svg.Element.ElementBase { createPattern (ctx, element) { const width = this.attribute('width').toPixels('x', true); const height = this.attribute('height').toPixels('y', true); // render me using a temporary svg element const tempSvg = new svg.Element.svg(); tempSvg.attributes.viewBox = new svg.Property('viewBox', this.attribute('viewBox').value); tempSvg.attributes.width = new svg.Property('width', width + 'px'); tempSvg.attributes.height = new svg.Property('height', height + 'px'); tempSvg.attributes.transform = new svg.Property('transform', this.attribute('patternTransform').value); tempSvg.children = this.children; const c = document.createElement('canvas'); c.width = width; c.height = height; const cctx = c.getContext('2d'); if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) { cctx.translate(this.attribute('x').toPixels('x', true), this.attribute('y').toPixels('y', true)); } // render 3x3 grid so when we transform there's no white space on edges for (let x = -1; x <= 1; x++) { for (let y = -1; y <= 1; y++) { cctx.save(); cctx.translate(x * c.width, y * c.height); tempSvg.render(cctx); cctx.restore(); } } const pattern = ctx.createPattern(c, 'repeat'); return pattern; } }; // marker element svg.Element.marker = class extends svg.Element.ElementBase { render (ctx, point, angle) { ctx.translate(point.x, point.y); if (this.attribute('orient').valueOrDefault('auto') === 'auto') ctx.rotate(angle); if (this.attribute('markerUnits').valueOrDefault('strokeWidth') === 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth); ctx.save(); // render me using a temporary svg element const tempSvg = new svg.Element.svg(); tempSvg.attributes.viewBox = new svg.Property('viewBox', this.attribute('viewBox').value); tempSvg.attributes.refX = new svg.Property('refX', this.attribute('refX').value); tempSvg.attributes.refY = new svg.Property('refY', this.attribute('refY').value); tempSvg.attributes.width = new svg.Property('width', this.attribute('markerWidth').value); tempSvg.attributes.height = new svg.Property('height', this.attribute('markerHeight').value); tempSvg.attributes.fill = new svg.Property('fill', this.attribute('fill').valueOrDefault('black')); tempSvg.attributes.stroke = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none')); tempSvg.children = this.children; tempSvg.render(ctx); ctx.restore(); if (this.attribute('markerUnits').valueOrDefault('strokeWidth') === 'strokeWidth') ctx.scale(1 / ctx.lineWidth, 1 / ctx.lineWidth); if (this.attribute('orient').valueOrDefault('auto') === 'auto') ctx.rotate(-angle); ctx.translate(-point.x, -point.y); } }; // definitions element svg.Element.defs = class extends svg.Element.ElementBase { render (ctx) { // NOOP } }; // base for gradients svg.Element.GradientBase = class extends svg.Element.ElementBase { constructor (node) { super(node); this.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox'); this.stops = []; this.children.forEach((child) => { if (child.type === 'stop') { this.stops.push(child); } }); } getGradient () { // OVERRIDE ME! } createGradient (ctx, element, parentOpacityProp) { const stopsContainer = this.getHrefAttribute().hasValue() ? this.getHrefAttribute().getDefinition() : this; const addParentOpacity = function (color) { if (parentOpacityProp.hasValue()) { const p = new svg.Property('color', color); return p.addOpacity(parentOpacityProp).value; } return color; }; const g = this.getGradient(ctx, element); if (isNullish(g)) return addParentOpacity(stopsContainer.stops[stopsContainer.stops.length - 1].color); stopsContainer.stops.forEach(({offset, color}) => { g.addColorStop(offset, addParentOpacity(color)); }); if (this.attribute('gradientTransform').hasValue()) { // render as transformed pattern on temporary canvas const rootView = svg.ViewPort.viewPorts[0]; const rect = new svg.Element.rect(); rect.attributes.x = new svg.Property('x', -svg.MAX_VIRTUAL_PIXELS / 3.0); rect.attributes.y = new svg.Property('y', -svg.MAX_VIRTUAL_PIXELS / 3.0); rect.attributes.width = new svg.Property('width', svg.MAX_VIRTUAL_PIXELS); rect.attributes.height = new svg.Property('height', svg.MAX_VIRTUAL_PIXELS); const group = new svg.Element.g(); group.attributes.transform = new svg.Property('transform', this.attribute('gradientTransform').value); group.children = [rect]; const tempSvg = new svg.Element.svg(); tempSvg.attributes.x = new svg.Property('x', 0); tempSvg.attributes.y = new svg.Property('y', 0); tempSvg.attributes.width = new svg.Property('width', rootView.width); tempSvg.attributes.height = new svg.Property('height', rootView.height); tempSvg.children = [group]; const c = document.createElement('canvas'); c.width = rootView.width; c.height = rootView.height; const tempCtx = c.getContext('2d'); tempCtx.fillStyle = g; tempSvg.render(tempCtx); return tempCtx.createPattern(c, 'no-repeat'); } return g; } }; // linear gradient element svg.Element.linearGradient = class extends svg.Element.GradientBase { getGradient (ctx, element) { const useBB = this.gradientUnits === 'objectBoundingBox' && element.getBoundingBox; const bb = useBB ? element.getBoundingBox() : null; if (!this.attribute('x1').hasValue() && !this.attribute('y1').hasValue() && !this.attribute('x2').hasValue() && !this.attribute('y2').hasValue() ) { this.attribute('x1', true).value = 0; this.attribute('y1', true).value = 0; this.attribute('x2', true).value = 1; this.attribute('y2', true).value = 0; } const x1 = (useBB ? bb.x() + bb.width() * this.attribute('x1').numValue() : this.attribute('x1').toPixels('x')); const y1 = (useBB ? bb.y() + bb.height() * this.attribute('y1').numValue() : this.attribute('y1').toPixels('y')); const x2 = (useBB ? bb.x() + bb.width() * this.attribute('x2').numValue() : this.attribute('x2').toPixels('x')); const y2 = (useBB ? bb.y() + bb.height() * this.attribute('y2').numValue() : this.attribute('y2').toPixels('y')); if (x1 === x2 && y1 === y2) return null; return ctx.createLinearGradient(x1, y1, x2, y2); } }; // radial gradient element svg.Element.radialGradient = class extends svg.Element.GradientBase { getGradient (ctx, element) { const useBB = this.gradientUnits === 'objectBoundingBox' && element.getBoundingBox; const bb = useBB ? element.getBoundingBox() : null; if (!this.attribute('cx').hasValue()) this.attribute('cx', true).value = '50%'; if (!this.attribute('cy').hasValue()) this.attribute('cy', true).value = '50%'; if (!this.attribute('r').hasValue()) this.attribute('r', true).value = '50%'; const cx = (useBB ? bb.x() + bb.width() * this.attribute('cx').numValue() : this.attribute('cx').toPixels('x')); const cy = (useBB ? bb.y() + bb.height() * this.attribute('cy').numValue() : this.attribute('cy').toPixels('y')); let fx = cx; let fy = cy; if (this.attribute('fx').hasValue()) { fx = (useBB ? bb.x() + bb.width() * this.attribute('fx').numValue() : this.attribute('fx').toPixels('x')); } if (this.attribute('fy').hasValue()) { fy = (useBB ? bb.y() + bb.height() * this.attribute('fy').numValue() : this.attribute('fy').toPixels('y')); } const r = (useBB ? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue() : this.attribute('r').toPixels()); return ctx.createRadialGradient(fx, fy, 0, cx, cy, r); } }; // gradient stop element svg.Element.stop = class extends svg.Element.ElementBase { constructor (node) { super(node); this.offset = this.attribute('offset').numValue(); if (this.offset < 0) this.offset = 0; if (this.offset > 1) this.offset = 1; let stopColor = this.style('stop-color'); if (this.style('stop-opacity').hasValue()) { stopColor = stopColor.addOpacity(this.style('stop-opacity')); } this.color = stopColor.value; } }; // animation base element svg.Element.AnimateBase = class extends svg.Element.ElementBase { constructor (node) { super(node); svg.Animations.push(this); this.duration = 0.0; this.begin = this.attribute('begin').toMilliseconds(); this.maxDuration = this.begin + this.attribute('dur').toMilliseconds(); this.initialValue = null; this.initialUnits = ''; this.removed = false; this.from = this.attribute('from'); this.to = this.attribute('to'); this.values = this.attribute('values'); if (this.values.hasValue()) this.values.value = this.values.value.split(';'); } getProperty () { const attributeType = this.attribute('attributeType').value; const attributeName = this.attribute('attributeName').value; if (attributeType === 'CSS') { return this.parent.style(attributeName, true); } return this.parent.attribute(attributeName, true); } calcValue () { // OVERRIDE ME! return ''; } update (delta) { // set initial value if (isNullish(this.initialValue)) { this.initialValue = this.getProperty().value; this.initialUnits = this.getProperty().getUnits(); } // if we're past the end time if (this.duration > this.maxDuration) { // loop for indefinitely repeating animations if (this.attribute('repeatCount').value === 'indefinite' || this.attribute('repeatDur').value === 'indefinite') { this.duration = 0.0; } else if (this.attribute('fill').valueOrDefault('remove') === 'freeze' && !this.frozen) { this.frozen = true; this.parent.animationFrozen = true; this.parent.animationFrozenValue = this.getProperty().value; } else if (this.attribute('fill').valueOrDefault('remove') === 'remove' && !this.removed) { this.removed = true; this.getProperty().value = this.parent.animationFrozen ? this.parent.animationFrozenValue : this.initialValue; return true; } return false; } this.duration += delta; // if we're past the begin time let updated = false; if (this.begin < this.duration) { let newValue = this.calcValue(); // tween if (this.attribute('type').hasValue()) { // for transform, etc. const type = this.attribute('type').value; newValue = type + '(' + newValue + ')'; } this.getProperty().value = newValue; updated = true; } return updated; } // fraction of duration we've covered progress () { const ret = {progress: (this.duration - this.begin) / (this.maxDuration - this.begin)}; if (this.values.hasValue()) { const p = ret.progress * (this.values.value.length - 1); const lb = Math.floor(p), ub = Math.ceil(p); ret.from = new svg.Property('from', parseFloat(this.values.value[lb])); ret.to = new svg.Property('to', parseFloat(this.values.value[ub])); ret.progress = (p - lb) / (ub - lb); } else { ret.from = this.from; ret.to = this.to; } return ret; } }; // animate element svg.Element.animate = class extends svg.Element.AnimateBase { calcValue () { const p = this.progress(); // tween value linearly const newValue = p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress; return newValue + this.initialUnits; } }; // animate color element svg.Element.animateColor = class extends svg.Element.AnimateBase { calcValue () { const p = this.progress(); const from = new RGBColor(p.from.value); const to = new RGBColor(p.to.value); if (from.ok && to.ok) { // tween color linearly const r = from.r + (to.r - from.r) * p.progress; const g = from.g + (to.g - from.g) * p.progress; const b = from.b + (to.b - from.b) * p.progress; return 'rgb(' + parseInt(r) + ',' + parseInt(g) + ',' + parseInt(b) + ')'; } return this.attribute('from').value; } }; // animate transform element svg.Element.animateTransform = class extends svg.Element.animate { calcValue () { const p = this.progress(); // tween value linearly const from = svg.ToNumberArray(p.from.value); const to = svg.ToNumberArray(p.to.value); let newValue = ''; from.forEach((fr, i) => { newValue += fr + (to[i] - fr) * p.progress + ' '; }); return newValue; } }; // font element svg.Element.font = class extends svg.Element.ElementBase { constructor (node) { super(node); this.horizAdvX = this.attribute('horiz-adv-x').numValue(); this.isRTL = false; this.isArabic = false; this.fontFace = null; this.missingGlyph = null; this.glyphs = []; this.children.forEach((child) => { if (child.type === 'font-face') { this.fontFace = child; if (child.style('font-family').hasValue()) { svg.Definitions[child.style('font-family').value] = this; } } else if (child.type === 'missing-glyph') { this.missingGlyph = child; } else if (child.type === 'glyph') { if (child.arabicForm !== '') { this.isRTL = true; this.isArabic = true; if (typeof this.glyphs[child.unicode] === 'undefined') { this.glyphs[child.unicode] = []; } this.glyphs[child.unicode][child.arabicForm] = child; } else { this.glyphs[child.unicode] = child; } } }); } }; // font-face element svg.Element.fontface = class extends svg.Element.ElementBase { constructor (node) { super(node); this.ascent = this.attribute('ascent').value; this.descent = this.attribute('descent').value; this.unitsPerEm = this.attribute('units-per-em').numValue(); } }; // missing-glyph element svg.Element.missingglyph = class extends svg.Element.path { constructor (node) { super(node); this.horizAdvX = 0; } }; // glyph element svg.Element.glyph = class extends svg.Element.path { constructor (node) { super(node); this.horizAdvX = this.attribute('horiz-adv-x').numValue(); this.unicode = this.attribute('unicode').value; this.arabicForm = this.attribute('arabic-form').value; } }; // text element svg.Element.text = class extends svg.Element.RenderedElementBase { constructor (node) { super(node, true); } setContext (ctx) { super.setContext(ctx); let textBaseline = this.style('dominant-baseline').toTextBaseline(); if (isNullish(textBaseline)) textBaseline = this.style('alignment-baseline').toTextBaseline(); if (!isNullish(textBaseline)) ctx.textBaseline = textBaseline; } getBoundingBox () { const x = this.attribute('x').toPixels('x'); const y = this.attribute('y').toPixels('y'); const fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize); return new svg.BoundingBox(x, y - fontSize, x + Math.floor(fontSize * 2.0 / 3.0) * this.children[0].getText().length, y); } renderChildren (ctx) { this.x = this.attribute('x').toPixels('x'); this.y = this.attribute('y').toPixels('y'); this.x += this.getAnchorDelta(ctx, this, 0); this.children.forEach((child, i) => { this.renderChild(ctx, this, i); }); } getAnchorDelta (ctx, parent, startI) { const textAnchor = this.style('text-anchor').valueOrDefault('start'); if (textAnchor !== 'start') { let width = 0; for (let i = startI; i < parent.children.length; i++) { const child = parent.children[i]; if (i > startI && child.attribute('x').hasValue()) break; // new group width += child.measureTextRecursive(ctx); } return -1 * (textAnchor === 'end' ? width : width / 2.0); } return 0; } renderChild (ctx, parent, i) { const child = parent.children[i]; if (child.attribute('x').hasValue()) { child.x = child.attribute('x').toPixels('x') + this.getAnchorDelta(ctx, parent, i); if (child.attribute('dx').hasValue()) child.x += child.attribute('dx').toPixels('x'); } else { if (this.attribute('dx').hasValue()) this.x += this.attribute('dx').toPixels('x'); if (child.attribute('dx').hasValue()) this.x += child.attribute('dx').toPixels('x'); child.x = this.x; } this.x = child.x + child.measureText(ctx); if (child.attribute('y').hasValue()) { child.y = child.attribute('y').toPixels('y'); if (child.attribute('dy').hasValue()) child.y += child.attribute('dy').toPixels('y'); } else { if (this.attribute('dy').hasValue()) this.y += this.attribute('dy').toPixels('y'); if (child.attribute('dy').hasValue()) this.y += child.attribute('dy').toPixels('y'); child.y = this.y; } this.y = child.y; child.render(ctx); for (let j = 0; j < child.children.length; j++) { this.renderChild(ctx, child, j); } } }; // text base svg.Element.TextElementBase = class extends svg.Element.RenderedElementBase { getGlyph (font, text, i) { const c = text[i]; let glyph = null; if (font.isArabic) { let arabicForm = 'isolated'; if ((i === 0 || text[i - 1] === ' ') && i < text.length - 2 && text[i + 1] !== ' ') arabicForm = 'terminal'; if (i > 0 && text[i - 1] !== ' ' && i < text.length - 2 && text[i + 1] !== ' ') arabicForm = 'medial'; if (i > 0 && text[i - 1] !== ' ' && (i === text.length - 1 || text[i + 1] === ' ')) arabicForm = 'initial'; if (typeof font.glyphs[c] !== 'undefined') { glyph = font.glyphs[c][arabicForm]; if (isNullish(glyph) && font.glyphs[c].type === 'glyph') glyph = font.glyphs[c]; } } else { glyph = font.glyphs[c]; } if (isNullish(glyph)) glyph = font.missingGlyph; return glyph; } renderChildren (ctx) { const customFont = this.parent.style('font-family').getDefinition(); if (!isNullish(customFont)) { const fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize); const fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle); let text = this.getText(); if (customFont.isRTL) text = text.split('').reverse().join(''); const dx = svg.ToNumberArray(this.parent.attribute('dx').value); for (let i = 0; i < text.length; i++) { const glyph = this.getGlyph(customFont, text, i); const scale = fontSize / customFont.fontFace.unitsPerEm; ctx.translate(this.x, this.y); ctx.scale(scale, -scale); const lw = ctx.lineWidth; ctx.lineWidth = ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize; if (fontStyle === 'italic') ctx.transform(1, 0, 0.4, 1, 0, 0); glyph.render(ctx); if (fontStyle === 'italic') ctx.transform(1, 0, -0.4, 1, 0, 0); ctx.lineWidth = lw; ctx.scale(1 / scale, -1 / scale); ctx.translate(-this.x, -this.y); this.x += fontSize * (glyph.horizAdvX || customFont.horizAdvX) / customFont.fontFace.unitsPerEm; if (typeof dx[i] !== 'undefined' && !isNaN(dx[i])) { this.x += dx[i]; } } return; } if (ctx.fillStyle !== '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y); if (ctx.strokeStyle !== '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y); } getText () { // OVERRIDE ME } measureTextRecursive (ctx) { let width = this.measureText(ctx); this.children.forEach((child) => { width += child.measureTextRecursive(ctx); }); return width; } measureText (ctx) { const customFont = this.parent.style('font-family').getDefinition(); if (!isNullish(customFont)) { const fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize); let measure = 0; let text = this.getText(); if (customFont.isRTL) text = text.split('').reverse().join(''); const dx = svg.ToNumberArray(this.parent.attribute('dx').value); for (let i = 0; i < text.length; i++) { const glyph = this.getGlyph(customFont, text, i); measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm; if (typeof dx[i] !== 'undefined' && !isNaN(dx[i])) { measure += dx[i]; } } return measure; } const textToMeasure = svg.compressSpaces(this.getText()); if (!ctx.measureText) return textToMeasure.length * 10; ctx.save(); this.setContext(ctx); const {width} = ctx.measureText(textToMeasure); ctx.restore(); return width; } }; // tspan svg.Element.tspan = class extends svg.Element.TextElementBase { constructor (node) { super(node, true); this.text = node.nodeValue || node.text || ''; } getText () { return this.text; } }; // tref svg.Element.tref = class extends svg.Element.TextElementBase { getText () { const element = this.getHrefAttribute().getDefinition(); if (!isNullish(element)) return element.children[0].getText(); return undefined; } }; // a element svg.Element.a = class extends svg.Element.TextElementBase { constructor (node) { super(node); this.hasText = true; [...node.childNodes].forEach((childNode) => { if (childNode.nodeType !== 3) { this.hasText = false; } }); // this might contain text this.text = this.hasText ? node.childNodes[0].nodeValue : ''; } getText () { return this.text; } renderChildren (ctx) { if (this.hasText) { // render as text element super.renderChildren(ctx); const fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize); svg.Mouse.checkBoundingBox(this, new svg.BoundingBox(this.x, this.y - fontSize.toPixels('y'), this.x + this.measureText(ctx), this.y)); } else { // render as temporary group const g = new svg.Element.g(); g.children = this.children; g.parent = this; g.render(ctx); } } onclick () { window.open(this.getHrefAttribute().value); } onmousemove () { svg.ctx.canvas.style.cursor = 'pointer'; } }; // image element svg.Element.image = class extends svg.Element.RenderedElementBase { constructor (node) { super(node); const href = this.getHrefAttribute().value; if (href === '') { return; } this._isSvg = href.match(/\.svg$/); svg.Images.push(this); this.loaded = false; if (!this._isSvg) { this.img = document.createElement('img'); if (svg.opts.useCORS === true) { this.img.crossOrigin = 'Anonymous'; } this.img.addEventListener('load', () => { this.loaded = true; }); this.img.addEventListener('error', () => { svg.log('ERROR: image "' + href + '" not found'); this.loaded = true; }); this.img.src = href; } else { svg.ajax(href, true).then((img) => { // eslint-disable-line promise/prefer-await-to-then, promise/always-return this.img = img; this.loaded = true; }).catch((err) => { // eslint-disable-line promise/prefer-await-to-callbacks this.erred = true; console.error('Ajax error for canvg', err); // eslint-disable-line no-console }); } } renderChildren (ctx) { const x = this.attribute('x').toPixels('x'); const y = this.attribute('y').toPixels('y'); const width = this.attribute('width').toPixels('x'); const height = this.attribute('height').toPixels('y'); if (width === 0 || height === 0) return; ctx.save(); if (this._isSvg) { ctx.drawSvg(this.img, x, y, width, height); } else { ctx.translate(x, y); svg.AspectRatio( ctx, this.attribute('preserveAspectRatio').value, width, this.img.width, height, this.img.height, 0, 0 ); ctx.drawImage(this.img, 0, 0); } ctx.restore(); } getBoundingBox () { const x = this.attribute('x').toPixels('x'); const y = this.attribute('y').toPixels('y'); const width = this.attribute('width').toPixels('x'); const height = this.attribute('height').toPixels('y'); return new svg.BoundingBox(x, y, x + width, y + height); } }; // group element svg.Element.g = class extends svg.Element.RenderedElementBase { getBoundingBox () { const bb = new svg.BoundingBox(); this.children.forEach((child) => { bb.addBoundingBox(child.getBoundingBox()); }); return bb; } }; // symbol element svg.Element.symbol = class extends svg.Element.RenderedElementBase { render (ctx) { // NO RENDER } }; // style element svg.Element.style = class extends svg.Element.ElementBase { constructor (node) { super(node); // text, or spaces then CDATA let css = ''; [...node.childNodes].forEach(({nodeValue}) => { css += nodeValue; }); // remove comments css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/)|(^\s*\/\/.*)/gm, ''); // eslint-disable-line unicorn/no-unsafe-regex // replace whitespace css = svg.compressSpaces(css); const cssDefs = css.split('}'); cssDefs.forEach((cssDef) => { if (svg.trim(cssDef) !== '') { let [cssClasses, cssProps] = cssDef.split('{'); cssClasses = cssClasses.split(','); cssProps = cssProps.split(';'); cssClasses.forEach((cssClass) => { cssClass = svg.trim(cssClass); if (cssClass !== '') { const props = {}; cssProps.forEach((cssProp) => { const prop = cssProp.indexOf(':'); const name = cssProp.substr(0, prop); const value = cssProp.substr(prop + 1, cssProp.length - prop); if (!isNullish(name) && !isNullish(value)) { props[svg.trim(name)] = new svg.Property(svg.trim(name), svg.trim(value)); } }); svg.Styles[cssClass] = props; if (cssClass === '@font-face') { const fontFamily = props['font-family'].value.replace(/"/g, ''); const srcs = props.src.value.split(','); srcs.forEach((src) => { if (src.includes('format("svg")')) { const urlStart = src.indexOf('url'); const urlEnd = src.indexOf(')', urlStart); const url = src.substr(urlStart + 5, urlEnd - urlStart - 6); // Can this ajax safely be converted to async? const doc = svg.parseXml(svg.ajax(url)); const fonts = doc.getElementsByTagName('font'); [...fonts].forEach((font) => { font = svg.CreateElement(font); svg.Definitions[fontFamily] = font; }); } }); } } }); } }); } }; // use element svg.Element.use = class extends svg.Element.RenderedElementBase { constructor (node) { super(node); this._el = this.getHrefAttribute().getDefinition(); } setContext (ctx) { super.setContext(ctx); if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').toPixels('x'), 0); if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').toPixels('y')); } path (ctx) { const {_el: element} = this; if (!isNullish(element)) element.path(ctx); } getBoundingBox () { const {_el: element} = this; if (!isNullish(element)) return element.getBoundingBox(); return undefined; } renderChildren (ctx) { const {_el: element} = this; if (!isNullish(element)) { let tempSvg = element; if (element.type === 'symbol') { // render me using a temporary svg element in symbol cases (https://www.w3.org/TR/SVG/struct.html#UseElement) tempSvg = new svg.Element.svg(); tempSvg.type = 'svg'; tempSvg.attributes.viewBox = new svg.Property('viewBox', element.attribute('viewBox').value); tempSvg.attributes.preserveAspectRatio = new svg.Property('preserveAspectRatio', element.attribute('preserveAspectRatio').value); tempSvg.attributes.overflow = new svg.Property('overflow', element.attribute('overflow').value); tempSvg.children = element.children; } if (tempSvg.type === 'svg') { // if symbol or svg, inherit width/height from me if (this.attribute('width').hasValue()) tempSvg.attributes.width = new svg.Property('width', this.attribute('width').value); if (this.attribute('height').hasValue()) tempSvg.attributes.height = new svg.Property('height', this.attribute('height').value); } const oldParent = tempSvg.parent; tempSvg.parent = null; tempSvg.render(ctx); tempSvg.parent = oldParent; } } }; // mask element svg.Element.mask = class extends svg.Element.ElementBase { apply (ctx, element) { // render as temp svg let x = this.attribute('x').toPixels('x'); let y = this.attribute('y').toPixels('y'); let width = this.attribute('width').toPixels('x'); let height = this.attribute('height').toPixels('y'); if (width === 0 && height === 0) { const bb = new svg.BoundingBox(); this.children.forEach((child) => { bb.addBoundingBox(child.getBoundingBox()); }); x = Math.floor(bb.x1); y = Math.floor(bb.y1); width = Math.floor(bb.width()); height = Math.floor(bb.height()); } // temporarily remove mask to avoid recursion const mask = element.attribute('mask').value; element.attribute('mask').value = ''; const cMask = document.createElement('canvas'); cMask.width = x + width; cMask.height = y + height; const maskCtx = cMask.getContext('2d'); this.renderChildren(maskCtx); const c = document.createElement('canvas'); c.width = x + width; c.height = y + height; const tempCtx = c.getContext('2d'); element.render(tempCtx); tempCtx.globalCompositeOperation = 'destination-in'; tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat'); tempCtx.fillRect(0, 0, x + width, y + height); ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat'); ctx.fillRect(0, 0, x + width, y + height); // reassign mask element.attribute('mask').value = mask; } render (ctx) { // NO RENDER } }; // clip element svg.Element.clipPath = class extends svg.Element.ElementBase { apply (ctx) { this.children.forEach((child) => { if (typeof child.path !== 'undefined') { let transform = null; if (child.attribute('transform').hasValue()) { transform = new svg.Transform(child.attribute('transform').value); transform.apply(ctx); } child.path(ctx); ctx.clip(); if (transform) { transform.unapply(ctx); } } }); } render (ctx) { // NO RENDER } }; // filters svg.Element.filter = class extends svg.Element.ElementBase { apply (ctx, element) { // render as temp svg const bb = element.getBoundingBox(); const x = Math.floor(bb.x1); const y = Math.floor(bb.y1); const width = Math.floor(bb.width()); const height = Math.floor(bb.height()); // temporarily remove filter to avoid recursion const filter = element.style('filter').value; element.style('filter').value = ''; let px = 0, py = 0; this.children.forEach((child) => { const efd = child.extraFilterDistance || 0; px = Math.max(px, efd); py = Math.max(py, efd); }); const c = document.createElement('canvas'); c.width = width + 2 * px; c.height = height + 2 * py; const tempCtx = c.getContext('2d'); tempCtx.translate(-x + px, -y + py); element.render(tempCtx); // apply filters this.children.forEach((child) => { child.apply(tempCtx, 0, 0, width + 2 * px, height + 2 * py); }); // render on me ctx.drawImage(c, 0, 0, width + 2 * px, height + 2 * py, x - px, y - py, width + 2 * px, height + 2 * py); // reassign filter element.style('filter', true).value = filter; } render (ctx) { // NO RENDER } }; svg.Element.feMorphology = class extends svg.Element.ElementBase { apply (ctx, x, y, width, height) { // TODO: implement } }; svg.Element.feComposite = class extends svg.Element.ElementBase { apply (ctx, x, y, width, height) { // TODO: implement } }; /** * @param {Uint8ClampedArray} img * @param {Integer} x * @param {Integer} y * @param {Float} width * @param {Float} height * @param {Integer} rgba * @returns {Integer} */ function imGet (img, x, y, width, height, rgba) { return img[y * width * 4 + x * 4 + rgba]; } /** * @param {Uint8ClampedArray} img * @param {Integer} x * @param {Integer} y * @param {Float} width * @param {Float} height * @param {Integer} rgba * @param {Float} val * @returns {void} */ function imSet (img, x, y, width, height, rgba, val) { img[y * width * 4 + x * 4 + rgba] = val; } svg.Element.feColorMatrix = class extends svg.Element.ElementBase { constructor (node) { super(node); let matrix = svg.ToNumberArray(this.attribute('values').value); switch (this.attribute('type').valueOrDefault('matrix')) { // https://www.w3.org/TR/SVG/filters.html#feColorMatrixElement case 'saturate': { const s = matrix[0]; matrix = [ 0.213 + 0.787 * s, 0.715 - 0.715 * s, 0.072 - 0.072 * s, 0, 0, 0.213 - 0.213 * s, 0.715 + 0.285 * s, 0.072 - 0.072 * s, 0, 0, 0.213 - 0.213 * s, 0.715 - 0.715 * s, 0.072 + 0.928 * s, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1 ]; break; } case 'hueRotate': { const a = matrix[0] * Math.PI / 180.0; const c = function (m1, m2, m3) { return m1 + Math.cos(a) * m2 + Math.sin(a) * m3; }; matrix = [ c(0.213, 0.787, -0.213), c(0.715, -0.715, -0.715), c(0.072, -0.072, 0.928), 0, 0, c(0.213, -0.213, 0.143), c(0.715, 0.285, 0.140), c(0.072, -0.072, -0.283), 0, 0, c(0.213, -0.213, -0.787), c(0.715, -0.715, 0.715), c(0.072, 0.928, 0.072), 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1 ]; break; } case 'luminanceToAlpha': matrix = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.2125, 0.7154, 0.0721, 0, 0, 0, 0, 0, 0, 1 ]; break; } this.matrix = matrix; this._m = (i, v) => { const mi = matrix[i]; return mi * (mi < 0 ? v - 255 : v); }; } apply (ctx, x, y, width, height) { const {_m: m} = this; // assuming x==0 && y==0 for now const srcData = ctx.getImageData(0, 0, width, height); for (let _y = 0; _y < height; _y++) { for (let _x = 0; _x < width; _x++) { const r = imGet(srcData.data, _x, _y, width, height, 0); const g = imGet(srcData.data, _x, _y, width, height, 1); const b = imGet(srcData.data, _x, _y, width, height, 2); const a = imGet(srcData.data, _x, _y, width, height, 3); imSet(srcData.data, _x, _y, width, height, 0, m(0, r) + m(1, g) + m(2, b) + m(3, a) + m(4, 1)); imSet(srcData.data, _x, _y, width, height, 1, m(5, r) + m(6, g) + m(7, b) + m(8, a) + m(9, 1)); imSet(srcData.data, _x, _y, width, height, 2, m(10, r) + m(11, g) + m(12, b) + m(13, a) + m(14, 1)); imSet(srcData.data, _x, _y, width, height, 3, m(15, r) + m(16, g) + m(17, b) + m(18, a) + m(19, 1)); } } ctx.clearRect(0, 0, width, height); ctx.putImageData(srcData, 0, 0); } }; svg.Element.feGaussianBlur = class extends svg.Element.ElementBase { constructor (node) { super(node); this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue()); this.extraFilterDistance = this.blurRadius; } apply (ctx, x, y, width, height) { // Todo: This might not be a problem anymore with out `instanceof` fix // StackBlur requires canvas be on document ctx.canvas.id = svg.UniqueId(); ctx.canvas.style.display = 'none'; document.body.append(ctx.canvas); canvasRGBA(ctx.canvas, x, y, width, height, this.blurRadius); ctx.canvas.remove(); } }; // title element, do nothing svg.Element.title = class extends svg.Element.ElementBase { constructor (node) { super(); } }; // desc element, do nothing svg.Element.desc = class extends svg.Element.ElementBase { constructor (node) { super(); } }; svg.Element.MISSING = class extends svg.Element.ElementBase { constructor (node) { super(); svg.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.'); } }; // element factory svg.CreateElement = function (node) { const className = node.nodeName .replace(/^[^:]+:/, '') // remove namespace .replace(/-/g, ''); // remove dashes let e; if (typeof svg.Element[className] !== 'undefined') { e = new svg.Element[className](node); } else { e = new svg.Element.MISSING(node); } e.type = node.nodeName; return e; }; // load from url svg.load = async function (ctx, url) { const dom = await svg.ajax(url, true); return svg.loadXml(ctx, dom); }; // load from xml svg.loadXml = function (ctx, xml) { return svg.loadXmlDoc(ctx, svg.parseXml(xml)); }; svg.loadXmlDoc = function (ctx, dom) { let res; svg.init(ctx); const mapXY = function (p) { let e = ctx.canvas; while (e) { p.x -= e.offsetLeft; p.y -= e.offsetTop; e = e.offsetParent; } if (window.scrollX) p.x += window.scrollX; if (window.scrollY) p.y += window.scrollY; return p; }; // bind mouse if (svg.opts.ignoreMouse !== true) { ctx.canvas.addEventListener('click', function (e) { const args = !isNullish(e) ? [e.clientX, e.clientY] : [event.clientX, event.clientY]; // eslint-disable-line no-restricted-globals const {x, y} = mapXY(new svg.Point(...args)); svg.Mouse.onclick(x, y); }); ctx.canvas.addEventListener('mousemove', function (e) { const args = !isNullish(e) ? [e.clientX, e.clientY] : [event.clientX, event.clientY]; // eslint-disable-line no-restricted-globals const {x, y} = mapXY(new svg.Point(...args)); svg.Mouse.onmousemove(x, y); }); } const e = svg.CreateElement(dom.documentElement); e.root = true; // render loop let isFirstRender = true; const draw = function (resolve) { svg.ViewPort.Clear(); if (ctx.canvas.parentNode) { svg.ViewPort.SetCurrent( ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight ); } if (svg.opts.ignoreDimensions !== true) { // set canvas size if (e.style('width').hasValue()) { ctx.canvas.width = e.style('width').toPixels('x'); ctx.canvas.style.width = ctx.canvas.width + 'px'; } if (e.style('height').hasValue()) { ctx.canvas.height = e.style('height').toPixels('y'); ctx.canvas.style.height = ctx.canvas.height + 'px'; } } let cWidth = ctx.canvas.clientWidth || ctx.canvas.width; let cHeight = ctx.canvas.clientHeight || ctx.canvas.height; if (svg.opts.ignoreDimensions === true && e.style('width').hasValue() && e.style('height').hasValue() ) { cWidth = e.style('width').toPixels('x'); cHeight = e.style('height').toPixels('y'); } svg.ViewPort.SetCurrent(cWidth, cHeight); if (!isNullish(svg.opts.offsetX)) { e.attribute('x', true).value = svg.opts.offsetX; } if (!isNullish(svg.opts.offsetY)) { e.attribute('y', true).value = svg.opts.offsetY; } if (!isNullish(svg.opts.scaleWidth) || !isNullish(svg.opts.scaleHeight)) { const viewBox = svg.ToNumberArray(e.attribute('viewBox').value); let xRatio = null, yRatio = null; if (!isNullish(svg.opts.scaleWidth)) { if (e.attribute('width').hasValue()) { xRatio = e.attribute('width').toPixels('x') / svg.opts.scaleWidth; } else if (!isNaN(viewBox[2])) { xRatio = viewBox[2] / svg.opts.scaleWidth; } } if (!isNullish(svg.opts.scaleHeight)) { if (e.attribute('height').hasValue()) { yRatio = e.attribute('height').toPixels('y') / svg.opts.scaleHeight; } else if (!isNaN(viewBox[3])) { yRatio = viewBox[3] / svg.opts.scaleHeight; } } if (isNullish(xRatio)) { xRatio = yRatio; } if (isNullish(yRatio)) { yRatio = xRatio; } e.attribute('width', true).value = svg.opts.scaleWidth; e.attribute('height', true).value = svg.opts.scaleHeight; e.attribute('viewBox', true).value = '0 0 ' + (cWidth * xRatio) + ' ' + (cHeight * yRatio); e.attribute('preserveAspectRatio', true).value = 'none'; } // clear and render if (svg.opts.ignoreClear !== true) { ctx.clearRect(0, 0, cWidth, cHeight); } e.render(ctx); if (isFirstRender) { isFirstRender = false; resolve(dom); } }; let waitingForImages = true; svg.intervalID = setInterval(function () { let needUpdate = false; if (waitingForImages && svg.ImagesLoaded()) { waitingForImages = false; needUpdate = true; } // need update from mouse events? if (svg.opts.ignoreMouse !== true) { needUpdate = needUpdate || svg.Mouse.hasEvents(); } // need update from animations? if (svg.opts.ignoreAnimation !== true) { svg.Animations.forEach((animation) => { const needAnimationUpdate = animation.update(1000 / svg.FRAMERATE); needUpdate = needUpdate || needAnimationUpdate; }); } // need update from redraw? if (typeof svg.opts.forceRedraw === 'function') { if (svg.opts.forceRedraw() === true) { needUpdate = true; } } // render if needed if (needUpdate) { draw(res); svg.Mouse.runEvents(); // run and clear our events } }, 1000 / svg.FRAMERATE); // Todo: Replace with an image loading Promise utility? return new Promise((resolve, reject) => { // eslint-disable-line promise/avoid-new if (svg.ImagesLoaded()) { waitingForImages = false; draw(resolve); return; } res = resolve; }); }; svg.stop = () => { if (svg.intervalID) { clearInterval(svg.intervalID); } }; svg.Mouse = { events: [], hasEvents () { return this.events.length !== 0; }, onclick (x, y) { this.events.push({ type: 'onclick', x, y, run (e) { if (e.onclick) e.onclick(); } }); }, onmousemove (x, y) { this.events.push({ type: 'onmousemove', x, y, run (e) { if (e.onmousemove) e.onmousemove(); } }); }, eventElements: [], checkPath (element, ctx) { this.events.forEach(({x, y}, i) => { if (ctx.isPointInPath && ctx.isPointInPath(x, y)) { this.eventElements[i] = element; } }); }, checkBoundingBox (element, bb) { this.events.forEach(({x, y}, i) => { if (bb.isPointInBox(x, y)) { this.eventElements[i] = element; } }); }, runEvents () { svg.ctx.canvas.style.cursor = ''; this.events.forEach((e, i) => { let element = this.eventElements[i]; while (element) { e.run(element); element = element.parent; } }); // done running, clear this.events = []; this.eventElements = []; } }; return svg; } if (typeof CanvasRenderingContext2D !== 'undefined') { CanvasRenderingContext2D.prototype.drawSvg = function (s, dx, dy, dw, dh) { canvg(this.canvas, s, { ignoreMouse: true, ignoreAnimation: true, ignoreDimensions: true, ignoreClear: true, offsetX: dx, offsetY: dy, scaleWidth: dw, scaleHeight: dh }); }; }