/* 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 <gabelerner@gmail.com>
* @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} opts.ignoreMouse true => ignore mouse events
* @property {boolean} opts.ignoreAnimation true => ignore animations
* @property {boolean} opts.ignoreDimensions true => does not try to resize canvas
* @property {boolean} opts.ignoreClear true => does not clear canvas
* @property {Integer} opts.offsetX int => draws at a x offset
* @property {Integer} opts.offsetY int => draws at a y offset
* @property {Integer} opts.scaleWidth int => scales horizontally to width
* @property {Integer} opts.scaleHeight int => scales vertically to height
* @property {module:canvg.ForceRedraw} opts.forceRedraw function => will call the function on every frame, if it returns true, will redraw
* @property {boolean} opts.log Adds log function
* @property {boolean} opts.useCORS Whether to set CORS `crossOrigin` for the image to `Anonymous`
*/
/**
* If called with no arguments, it will replace all `<svg>` elements on the page
* with `<canvas>` 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<XMLDocument|XMLDocument[]>} 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\r\t\n]+/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(/<!DOCTYPE svg[^>]*>/, '');
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(/[0-9.-]/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 = 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
});
};
}