svgedit/dist/extensions/ext-server_opensave.js

var svgEditorExtension_server_opensave = (function () {
  'use strict';

  /**
   * For parsing color values.
   * @module RGBColor
   * @author Stoyan Stefanov <sstoo@gmail.com>
   * @see https://www.phpied.com/rgb-color-parser-in-javascript/
   * @license MIT
  */
  const simpleColors = {
    aliceblue: 'f0f8ff',
    antiquewhite: 'faebd7',
    aqua: '00ffff',
    aquamarine: '7fffd4',
    azure: 'f0ffff',
    beige: 'f5f5dc',
    bisque: 'ffe4c4',
    black: '000000',
    blanchedalmond: 'ffebcd',
    blue: '0000ff',
    blueviolet: '8a2be2',
    brown: 'a52a2a',
    burlywood: 'deb887',
    cadetblue: '5f9ea0',
    chartreuse: '7fff00',
    chocolate: 'd2691e',
    coral: 'ff7f50',
    cornflowerblue: '6495ed',
    cornsilk: 'fff8dc',
    crimson: 'dc143c',
    cyan: '00ffff',
    darkblue: '00008b',
    darkcyan: '008b8b',
    darkgoldenrod: 'b8860b',
    darkgray: 'a9a9a9',
    darkgreen: '006400',
    darkkhaki: 'bdb76b',
    darkmagenta: '8b008b',
    darkolivegreen: '556b2f',
    darkorange: 'ff8c00',
    darkorchid: '9932cc',
    darkred: '8b0000',
    darksalmon: 'e9967a',
    darkseagreen: '8fbc8f',
    darkslateblue: '483d8b',
    darkslategray: '2f4f4f',
    darkturquoise: '00ced1',
    darkviolet: '9400d3',
    deeppink: 'ff1493',
    deepskyblue: '00bfff',
    dimgray: '696969',
    dodgerblue: '1e90ff',
    feldspar: 'd19275',
    firebrick: 'b22222',
    floralwhite: 'fffaf0',
    forestgreen: '228b22',
    fuchsia: 'ff00ff',
    gainsboro: 'dcdcdc',
    ghostwhite: 'f8f8ff',
    gold: 'ffd700',
    goldenrod: 'daa520',
    gray: '808080',
    green: '008000',
    greenyellow: 'adff2f',
    honeydew: 'f0fff0',
    hotpink: 'ff69b4',
    indianred: 'cd5c5c',
    indigo: '4b0082',
    ivory: 'fffff0',
    khaki: 'f0e68c',
    lavender: 'e6e6fa',
    lavenderblush: 'fff0f5',
    lawngreen: '7cfc00',
    lemonchiffon: 'fffacd',
    lightblue: 'add8e6',
    lightcoral: 'f08080',
    lightcyan: 'e0ffff',
    lightgoldenrodyellow: 'fafad2',
    lightgrey: 'd3d3d3',
    lightgreen: '90ee90',
    lightpink: 'ffb6c1',
    lightsalmon: 'ffa07a',
    lightseagreen: '20b2aa',
    lightskyblue: '87cefa',
    lightslateblue: '8470ff',
    lightslategray: '778899',
    lightsteelblue: 'b0c4de',
    lightyellow: 'ffffe0',
    lime: '00ff00',
    limegreen: '32cd32',
    linen: 'faf0e6',
    magenta: 'ff00ff',
    maroon: '800000',
    mediumaquamarine: '66cdaa',
    mediumblue: '0000cd',
    mediumorchid: 'ba55d3',
    mediumpurple: '9370d8',
    mediumseagreen: '3cb371',
    mediumslateblue: '7b68ee',
    mediumspringgreen: '00fa9a',
    mediumturquoise: '48d1cc',
    mediumvioletred: 'c71585',
    midnightblue: '191970',
    mintcream: 'f5fffa',
    mistyrose: 'ffe4e1',
    moccasin: 'ffe4b5',
    navajowhite: 'ffdead',
    navy: '000080',
    oldlace: 'fdf5e6',
    olive: '808000',
    olivedrab: '6b8e23',
    orange: 'ffa500',
    orangered: 'ff4500',
    orchid: 'da70d6',
    palegoldenrod: 'eee8aa',
    palegreen: '98fb98',
    paleturquoise: 'afeeee',
    palevioletred: 'd87093',
    papayawhip: 'ffefd5',
    peachpuff: 'ffdab9',
    peru: 'cd853f',
    pink: 'ffc0cb',
    plum: 'dda0dd',
    powderblue: 'b0e0e6',
    purple: '800080',
    red: 'ff0000',
    rosybrown: 'bc8f8f',
    royalblue: '4169e1',
    saddlebrown: '8b4513',
    salmon: 'fa8072',
    sandybrown: 'f4a460',
    seagreen: '2e8b57',
    seashell: 'fff5ee',
    sienna: 'a0522d',
    silver: 'c0c0c0',
    skyblue: '87ceeb',
    slateblue: '6a5acd',
    slategray: '708090',
    snow: 'fffafa',
    springgreen: '00ff7f',
    steelblue: '4682b4',
    tan: 'd2b48c',
    teal: '008080',
    thistle: 'd8bfd8',
    tomato: 'ff6347',
    turquoise: '40e0d0',
    violet: 'ee82ee',
    violetred: 'd02090',
    wheat: 'f5deb3',
    white: 'ffffff',
    whitesmoke: 'f5f5f5',
    yellow: 'ffff00',
    yellowgreen: '9acd32'
  }; // array of color definition objects

  const colorDefs = [{
    re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
    // re: /^rgb\((?<r>\d{1,3}),\s*(?<g>\d{1,3}),\s*(?<b>\d{1,3})\)$/,
    example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],

    process(_, ...bits) {
      return bits.map(b => Number.parseInt(b));
    }

  }, {
    re: /^(\w{2})(\w{2})(\w{2})$/,
    // re: /^(?<r>\w{2})(?<g>\w{2})(?<b>\w{2})$/,
    example: ['#00ff00', '336699'],

    process(_, ...bits) {
      return bits.map(b => Number.parseInt(b, 16));
    }

  }, {
    re: /^(\w)(\w)(\w)$/,
    // re: /^(?<r>\w{1})(?<g>\w{1})(?<b>\w{1})$/,
    example: ['#fb0', 'f0f'],

    process(_, ...bits) {
      return bits.map(b => Number.parseInt(b + b, 16));
    }

  }];
  /**
   * A class to parse color values.
   */

  class RGBColor {
    /**
    * @param {string} colorString
    */
    constructor(colorString) {
      this.ok = false; // strip any leading #

      if (colorString.charAt(0) === '#') {
        // remove # if any
        colorString = colorString.substr(1, 6);
      }

      colorString = colorString.replace(/ /g, '');
      colorString = colorString.toLowerCase(); // before getting into regexps, try simple matches
      // and overwrite the input

      if (colorString in simpleColors) {
        colorString = simpleColors[colorString];
      } // end of simple type-in colors
      // search through the definitions to find a match


      colorDefs.forEach(({
        re,
        process: processor
      }) => {
        const bits = re.exec(colorString);

        if (bits) {
          const [r, g, b] = processor(...bits);
          Object.assign(this, {
            r,
            g,
            b
          });
          this.ok = true;
        }
      }); // validate/cleanup values

      this.r = this.r < 0 || isNaN(this.r) ? 0 : this.r > 255 ? 255 : this.r;
      this.g = this.g < 0 || isNaN(this.g) ? 0 : this.g > 255 ? 255 : this.g;
      this.b = this.b < 0 || isNaN(this.b) ? 0 : this.b > 255 ? 255 : this.b;
    } // some getters

    /**
    * @returns {string}
    */


    toRGB() {
      return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
    }
    /**
    * @returns {string}
    */


    toHex() {
      let r = this.r.toString(16);
      let g = this.g.toString(16);
      let b = this.b.toString(16);

      if (r.length === 1) {
        r = '0' + r;
      }

      if (g.length === 1) {
        g = '0' + g;
      }

      if (b.length === 1) {
        b = '0' + b;
      }

      return '#' + r + g + b;
    }
    /**
    * Offers a bulleted list of help.
    * @returns {HTMLUListElement}
    */


    static getHelpXML() {
      const examples = [// add regexps
      ...colorDefs.flatMap(({
        example
      }) => {
        return example;
      }), // add type-in colors
      ...Object.keys(simpleColors)];
      const xml = document.createElement('ul');
      xml.setAttribute('id', 'rgbcolor-examples');
      xml.append(...examples.map(example => {
        try {
          const listItem = document.createElement('li');
          const listColor = new RGBColor(example);
          const exampleDiv = document.createElement('div');
          exampleDiv.style.cssText = `
  margin: 3px;
  border: 1px solid black;
  background: ${listColor.toHex()};
  color: ${listColor.toHex()};`;
          exampleDiv.append('test');
          const listItemValue = ` ${example} -> ${listColor.toRGB()} -> ${listColor.toHex()}`;
          listItem.append(exampleDiv, listItemValue);
          return listItem;
        } catch (e) {
          return '';
        }
      }));
      return xml;
    }

  }

  function _typeof(obj) {
    "@babel/helpers - typeof";

    if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
      _typeof = function (obj) {
        return typeof obj;
      };
    } else {
      _typeof = function (obj) {
        return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
      };
    }

    return _typeof(obj);
  }

  function _classCallCheck(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  }
  /* eslint-disable no-bitwise, unicorn/prefer-query-selector */

  /**
  * StackBlur - a fast almost Gaussian Blur For Canvas
  *
  * In case you find this class useful - especially in commercial projects -
  * I am not totally unhappy for a small donation to my PayPal account
  * mario@quasimondo.de
  *
  * Or support me on flattr:
  * {@link https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript}.
  *
  * @module StackBlur
  * @author Mario Klingemann
  * Contact: mario@quasimondo.com
  * Website: {@link http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html}
  * Twitter: @quasimondo
  *
  * @copyright (c) 2010 Mario Klingemann
  *
  * Permission is hereby granted, free of charge, to any person
  * obtaining a copy of this software and associated documentation
  * files (the "Software"), to deal in the Software without
  * restriction, including without limitation the rights to use,
  * copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following
  * conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */

  /* eslint-disable max-len */


  var mulTable = [512, 512, 456, 512, 328, 456, 335, 512, 405, 328, 271, 456, 388, 335, 292, 512, 454, 405, 364, 328, 298, 271, 496, 456, 420, 388, 360, 335, 312, 292, 273, 512, 482, 454, 428, 405, 383, 364, 345, 328, 312, 298, 284, 271, 259, 496, 475, 456, 437, 420, 404, 388, 374, 360, 347, 335, 323, 312, 302, 292, 282, 273, 265, 512, 497, 482, 468, 454, 441, 428, 417, 405, 394, 383, 373, 364, 354, 345, 337, 328, 320, 312, 305, 298, 291, 284, 278, 271, 265, 259, 507, 496, 485, 475, 465, 456, 446, 437, 428, 420, 412, 404, 396, 388, 381, 374, 367, 360, 354, 347, 341, 335, 329, 323, 318, 312, 307, 302, 297, 292, 287, 282, 278, 273, 269, 265, 261, 512, 505, 497, 489, 482, 475, 468, 461, 454, 447, 441, 435, 428, 422, 417, 411, 405, 399, 394, 389, 383, 378, 373, 368, 364, 359, 354, 350, 345, 341, 337, 332, 328, 324, 320, 316, 312, 309, 305, 301, 298, 294, 291, 287, 284, 281, 278, 274, 271, 268, 265, 262, 259, 257, 507, 501, 496, 491, 485, 480, 475, 470, 465, 460, 456, 451, 446, 442, 437, 433, 428, 424, 420, 416, 412, 408, 404, 400, 396, 392, 388, 385, 381, 377, 374, 370, 367, 363, 360, 357, 354, 350, 347, 344, 341, 338, 335, 332, 329, 326, 323, 320, 318, 315, 312, 310, 307, 304, 302, 299, 297, 294, 292, 289, 287, 285, 282, 280, 278, 275, 273, 271, 269, 267, 265, 263, 261, 259];
  var shgTable = [9, 11, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24];
  /**
   * @param {string|HTMLCanvasElement} canvas
   * @param {Integer} topX
   * @param {Integer} topY
   * @param {Integer} width
   * @param {Integer} height
   * @throws {Error|TypeError}
   * @returns {ImageData} See {@link https://html.spec.whatwg.org/multipage/canvas.html#imagedata}
   */


  function getImageDataFromCanvas(canvas, topX, topY, width, height) {
    if (typeof canvas === 'string') {
      canvas = document.getElementById(canvas);
    }

    if (!canvas || _typeof(canvas) !== 'object' || !('getContext' in canvas)) {
      throw new TypeError('Expecting canvas with `getContext` method ' + 'in processCanvasRGB(A) calls!');
    }

    var context = canvas.getContext('2d');

    try {
      return context.getImageData(topX, topY, width, height);
    } catch (e) {
      throw new Error('unable to access image data: ' + e);
    }
  }
  /**
   * @param {HTMLCanvasElement} canvas
   * @param {Integer} topX
   * @param {Integer} topY
   * @param {Integer} width
   * @param {Integer} height
   * @param {Float} radius
   * @returns {undefined}
   */


  function processCanvasRGBA(canvas, topX, topY, width, height, radius) {
    if (isNaN(radius) || radius < 1) {
      return;
    }

    radius |= 0;
    var imageData = getImageDataFromCanvas(canvas, topX, topY, width, height);
    imageData = processImageDataRGBA(imageData, topX, topY, width, height, radius);
    canvas.getContext('2d').putImageData(imageData, topX, topY);
  }
  /**
   * @param {ImageData} imageData
   * @param {Integer} topX
   * @param {Integer} topY
   * @param {Integer} width
   * @param {Integer} height
   * @param {Float} radius
   * @returns {ImageData}
   */


  function processImageDataRGBA(imageData, topX, topY, width, height, radius) {
    var pixels = imageData.data;
    var x, y, i, p, yp, yi, yw, rSum, gSum, bSum, aSum, rOutSum, gOutSum, bOutSum, aOutSum, rInSum, gInSum, bInSum, aInSum, pr, pg, pb, pa, rbs;
    var div = 2 * radius + 1; // const w4 = width << 2;

    var widthMinus1 = width - 1;
    var heightMinus1 = height - 1;
    var radiusPlus1 = radius + 1;
    var sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;
    var stackStart = new BlurStack();
    var stack = stackStart;
    var stackEnd;

    for (i = 1; i < div; i++) {
      stack = stack.next = new BlurStack();

      if (i === radiusPlus1) {
        stackEnd = stack;
      }
    }

    stack.next = stackStart;
    var stackIn = null;
    var stackOut = null;
    yw = yi = 0;
    var mulSum = mulTable[radius];
    var shgSum = shgTable[radius];

    for (y = 0; y < height; y++) {
      rInSum = gInSum = bInSum = aInSum = rSum = gSum = bSum = aSum = 0;
      rOutSum = radiusPlus1 * (pr = pixels[yi]);
      gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
      bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
      aOutSum = radiusPlus1 * (pa = pixels[yi + 3]);
      rSum += sumFactor * pr;
      gSum += sumFactor * pg;
      bSum += sumFactor * pb;
      aSum += sumFactor * pa;
      stack = stackStart;

      for (i = 0; i < radiusPlus1; i++) {
        stack.r = pr;
        stack.g = pg;
        stack.b = pb;
        stack.a = pa;
        stack = stack.next;
      }

      for (i = 1; i < radiusPlus1; i++) {
        p = yi + ((widthMinus1 < i ? widthMinus1 : i) << 2);
        rSum += (stack.r = pr = pixels[p]) * (rbs = radiusPlus1 - i);
        gSum += (stack.g = pg = pixels[p + 1]) * rbs;
        bSum += (stack.b = pb = pixels[p + 2]) * rbs;
        aSum += (stack.a = pa = pixels[p + 3]) * rbs;
        rInSum += pr;
        gInSum += pg;
        bInSum += pb;
        aInSum += pa;
        stack = stack.next;
      }

      stackIn = stackStart;
      stackOut = stackEnd;

      for (x = 0; x < width; x++) {
        pixels[yi + 3] = pa = aSum * mulSum >> shgSum;

        if (pa !== 0) {
          pa = 255 / pa;
          pixels[yi] = (rSum * mulSum >> shgSum) * pa;
          pixels[yi + 1] = (gSum * mulSum >> shgSum) * pa;
          pixels[yi + 2] = (bSum * mulSum >> shgSum) * pa;
        } else {
          pixels[yi] = pixels[yi + 1] = pixels[yi + 2] = 0;
        }

        rSum -= rOutSum;
        gSum -= gOutSum;
        bSum -= bOutSum;
        aSum -= aOutSum;
        rOutSum -= stackIn.r;
        gOutSum -= stackIn.g;
        bOutSum -= stackIn.b;
        aOutSum -= stackIn.a;
        p = yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1) << 2;
        rInSum += stackIn.r = pixels[p];
        gInSum += stackIn.g = pixels[p + 1];
        bInSum += stackIn.b = pixels[p + 2];
        aInSum += stackIn.a = pixels[p + 3];
        rSum += rInSum;
        gSum += gInSum;
        bSum += bInSum;
        aSum += aInSum;
        stackIn = stackIn.next;
        rOutSum += pr = stackOut.r;
        gOutSum += pg = stackOut.g;
        bOutSum += pb = stackOut.b;
        aOutSum += pa = stackOut.a;
        rInSum -= pr;
        gInSum -= pg;
        bInSum -= pb;
        aInSum -= pa;
        stackOut = stackOut.next;
        yi += 4;
      }

      yw += width;
    }

    for (x = 0; x < width; x++) {
      gInSum = bInSum = aInSum = rInSum = gSum = bSum = aSum = rSum = 0;
      yi = x << 2;
      rOutSum = radiusPlus1 * (pr = pixels[yi]);
      gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
      bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
      aOutSum = radiusPlus1 * (pa = pixels[yi + 3]);
      rSum += sumFactor * pr;
      gSum += sumFactor * pg;
      bSum += sumFactor * pb;
      aSum += sumFactor * pa;
      stack = stackStart;

      for (i = 0; i < radiusPlus1; i++) {
        stack.r = pr;
        stack.g = pg;
        stack.b = pb;
        stack.a = pa;
        stack = stack.next;
      }

      yp = width;

      for (i = 1; i <= radius; i++) {
        yi = yp + x << 2;
        rSum += (stack.r = pr = pixels[yi]) * (rbs = radiusPlus1 - i);
        gSum += (stack.g = pg = pixels[yi + 1]) * rbs;
        bSum += (stack.b = pb = pixels[yi + 2]) * rbs;
        aSum += (stack.a = pa = pixels[yi + 3]) * rbs;
        rInSum += pr;
        gInSum += pg;
        bInSum += pb;
        aInSum += pa;
        stack = stack.next;

        if (i < heightMinus1) {
          yp += width;
        }
      }

      yi = x;
      stackIn = stackStart;
      stackOut = stackEnd;

      for (y = 0; y < height; y++) {
        p = yi << 2;
        pixels[p + 3] = pa = aSum * mulSum >> shgSum;

        if (pa > 0) {
          pa = 255 / pa;
          pixels[p] = (rSum * mulSum >> shgSum) * pa;
          pixels[p + 1] = (gSum * mulSum >> shgSum) * pa;
          pixels[p + 2] = (bSum * mulSum >> shgSum) * pa;
        } else {
          pixels[p] = pixels[p + 1] = pixels[p + 2] = 0;
        }

        rSum -= rOutSum;
        gSum -= gOutSum;
        bSum -= bOutSum;
        aSum -= aOutSum;
        rOutSum -= stackIn.r;
        gOutSum -= stackIn.g;
        bOutSum -= stackIn.b;
        aOutSum -= stackIn.a;
        p = x + ((p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width << 2;
        rSum += rInSum += stackIn.r = pixels[p];
        gSum += gInSum += stackIn.g = pixels[p + 1];
        bSum += bInSum += stackIn.b = pixels[p + 2];
        aSum += aInSum += stackIn.a = pixels[p + 3];
        stackIn = stackIn.next;
        rOutSum += pr = stackOut.r;
        gOutSum += pg = stackOut.g;
        bOutSum += pb = stackOut.b;
        aOutSum += pa = stackOut.a;
        rInSum -= pr;
        gInSum -= pg;
        bInSum -= pb;
        aInSum -= pa;
        stackOut = stackOut.next;
        yi += width;
      }
    }

    return imageData;
  }
  /**
   *
   */


  var BlurStack =
  /**
   * Set properties.
   */
  function BlurStack() {
    _classCallCheck(this, BlurStack);

    this.r = 0;
    this.g = 0;
    this.b = 0;
    this.a = 0;
    this.next = null;
  };

  /* eslint-disable new-cap, class-methods-use-this, jsdoc/require-jsdoc */
  /**
   * 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 `<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
  */


  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(/<!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 = Number.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 => Number.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 Number.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', Number.parseFloat(this.values.value[lb]));
          ret.to = new svg.Property('to', Number.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(' + Number.parseInt(r) + ',' + Number.parseInt(g) + ',' + Number.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);
        processCanvasRGBA(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
      });
    };
  }

  /**
   * @file ext-server_opensave.js
   *
   * @license MIT
   *
   * @copyright 2010 Alexis Deveria
   *
   */
  var extServer_opensave = {
    name: 'server_opensave',

    async init({
      $,
      decode64,
      encode64,
      importLocale
    }) {
      const strings = await importLocale();
      const svgEditor = this;
      const {
        curConfig: {
          extPath,
          avoidClientSide,
          // Deprecated
          avoidClientSideDownload,
          avoidClientSideOpen
        },
        canvas: svgCanvas
      } = svgEditor;
      /**
       *
       * @returns {string}
       */

      function getFileNameFromTitle() {
        const title = svgCanvas.getDocumentTitle(); // We convert (to underscore) only those disallowed Win7 file name characters

        return title.trim().replace(/[/\\:*?"<>|]/g, '_');
      }
      /**
       * Escapes XML predefined entities for quoted attributes.
       * @param {string} str
       * @returns {string}
       */


      function xhtmlEscape(str) {
        return str.replace(/&(?!amp;)/g, '&amp;').replace(/"/g, '&quot;').replace(/</g, '&lt;'); // < is actually disallowed above anyways
      }
      /**
       *
       * @param {string} [filename='image']
       * @param {string} suffix To add to file name
       * @param {string} uri
       * @returns {boolean}
       */


      function clientDownloadSupport(filename, suffix, uri) {
        if (avoidClientSide || avoidClientSideDownload) {
          return false;
        }

        const support = $('<a>')[0].download === '';
        let a;

        if (support) {
          a = $('<a>hidden</a>').attr({
            download: (filename || 'image') + suffix,
            href: uri
          }).css('display', 'none').appendTo('body');
          a[0].click();
          return true;
        }

        return false;
      }

      const saveSvgAction = extPath + 'filesave.php',
            saveImgAction = extPath + 'filesave.php'; // Create upload target (hidden iframe)

      let cancelled = false; //  Hiding by size instead of display to avoid FF console errors
      //    with `getBBox` in browser.js `supportsPathBBox_`)

      $(`<iframe name="output_frame" title="${strings.hiddenframe}"
          style="width: 0; height: 0;" src="data:text/html;base64,PGh0bWw+"/>`).appendTo('body');
      svgEditor.setCustomHandlers({
        save(win, data) {
          const svg = '<?xml version="1.0" encoding="UTF-8"?>\n' + data,
                // Firefox doesn't seem to know it is UTF-8 (no matter whether we use or skip the clientDownload code) despite the Content-Disposition header containing UTF-8, but adding the encoding works
          filename = getFileNameFromTitle();

          if (clientDownloadSupport(filename, '.svg', 'data:image/svg+xml;charset=UTF-8;base64,' + encode64(svg))) {
            return;
          }

          $('<form>').attr({
            method: 'post',
            action: saveSvgAction,
            target: 'output_frame'
          }).append(`
          <input type="hidden" name="output_svg" value="${xhtmlEscape(svg)}">
          <input type="hidden" name="filename" value="${xhtmlEscape(filename)}">
        `).appendTo('body').submit().remove();
        },

        exportPDF(win, data) {
          const filename = getFileNameFromTitle(),
                datauri = data.output;

          if (clientDownloadSupport(filename, '.pdf', datauri)) {
            return;
          }

          $('<form>').attr({
            method: 'post',
            action: saveImgAction,
            target: 'output_frame'
          }).append(`
          <input type="hidden" name="output_img" value="${datauri}">
          <input type="hidden" name="mime" value="application/pdf">
          <input type="hidden" name="filename" value="${xhtmlEscape(filename)}">
        `).appendTo('body').submit().remove();
        },

        // Todo: Integrate this extension with a new built-in exportWindowType, "download"
        async exportImage(win, data) {
          const {
            issues,
            mimeType,
            quality
          } = data;

          if (!$('#export_canvas').length) {
            $('<canvas>', {
              id: 'export_canvas'
            }).hide().appendTo('body');
          }

          const c = $('#export_canvas')[0];
          c.width = svgCanvas.contentW;
          c.height = svgCanvas.contentH;
          await canvg(c, data.svg);
          const datauri = quality ? c.toDataURL(mimeType, quality) : c.toDataURL(mimeType); // {uiStrings} = svgEditor;
          // Check if there are issues

          let pre,
              note = '';

          if (issues.length) {
            pre = '\n \u2022 '; // Bullet

            note += '\n\n' + pre + issues.join(pre);
          }

          if (note.length) {
            await $.alert(note);
          }

          const filename = getFileNameFromTitle();
          const suffix = '.' + data.type.toLowerCase();

          if (clientDownloadSupport(filename, suffix, datauri)) {
            return;
          }

          $('<form>').attr({
            method: 'post',
            action: saveImgAction,
            target: 'output_frame'
          }).append(`
          <input type="hidden" name="output_img" value="${datauri}">
          <input type="hidden" name="mime" value="${mimeType}">
          <input type="hidden" name="filename" value="${xhtmlEscape(filename)}">
        `).appendTo('body').submit().remove();
        }

      }); // Do nothing if client support is found

      if (window.FileReader && !avoidClientSideOpen) {
        return;
      } // Change these to appropriate script file


      const openSvgAction = extPath + 'fileopen.php?type=load_svg';
      const importSvgAction = extPath + 'fileopen.php?type=import_svg';
      const importImgAction = extPath + 'fileopen.php?type=import_img'; // Set up function for PHP uploader to use

      svgEditor.processFile = function (str64, type) {
        let xmlstr;

        if (cancelled) {
          cancelled = false;
          return;
        }

        $('#dialog_box').hide();

        if (type !== 'import_img') {
          xmlstr = decode64(str64);
        }

        switch (type) {
          case 'load_svg':
            svgCanvas.clear();
            svgCanvas.setSvgString(xmlstr);
            svgEditor.updateCanvas();
            break;

          case 'import_svg':
            svgCanvas.importSvgString(xmlstr);
            svgEditor.updateCanvas();
            break;

          case 'import_img':
            svgCanvas.setGoodImage(str64);
            break;
        }
      }; // Create upload form


      const openSvgForm = $('<form>');
      openSvgForm.attr({
        enctype: 'multipart/form-data',
        method: 'post',
        action: openSvgAction,
        target: 'output_frame'
      }); // Create import form

      const importSvgForm = openSvgForm.clone().attr('action', importSvgAction); // Create image form

      const importImgForm = openSvgForm.clone().attr('action', importImgAction); // It appears necessary to rebuild this input every time a file is
      // selected so the same file can be picked and the change event can fire.

      /**
       *
       * @param {external:jQuery} form
       * @returns {void}
       */

      function rebuildInput(form) {
        form.empty();
        const inp = $('<input type="file" name="svg_file">').appendTo(form);
        /**
         * Submit the form, empty its contents for reuse and show
         *   uploading message.
         * @returns {Promise<void>}
         */

        async function submit() {
          // This submits the form, which returns the file data using `svgEditor.processFile()`
          form.submit();
          rebuildInput(form);
          await $.process_cancel(strings.uploading);
          cancelled = true;
          $('#dialog_box').hide();
        }

        if (form[0] === openSvgForm[0]) {
          inp.change(async function () {
            // This takes care of the "are you sure" dialog box
            const ok = await svgEditor.openPrep();

            if (!ok) {
              rebuildInput(form);
              return;
            }

            await submit();
          });
        } else {
          inp.change(async function () {
            // This submits the form, which returns the file data using svgEditor.processFile()
            await submit();
          });
        }
      } // Create the input elements


      rebuildInput(openSvgForm);
      rebuildInput(importSvgForm);
      rebuildInput(importImgForm); // Add forms to buttons

      $('#tool_open').show().prepend(openSvgForm);
      $('#tool_import').show().prepend(importSvgForm);
      $('#tool_image').prepend(importImgForm);
    }

  };

  return extServer_opensave;

}());