lottie-web/player/js/elements/helpers/shapes/SVGGradientFillStyleData.js

After Effects plugin for exporting animations to SVG + JavaScript or canvas + JavaScript

import {
  degToRads,
  createElementID,
} from '../../../utils/common';
import { getLocationHref } from '../../../main';
import {
  extendPrototype,
} from '../../../utils/functionExtensions';
import DynamicPropertyContainer from '../../../utils/helpers/dynamicProperties';
import PropertyFactory from '../../../utils/PropertyFactory';
import createNS from '../../../utils/helpers/svg_elements';
import GradientProperty from '../../../utils/shapes/GradientProperty';
import {
  lineCapEnum,
  lineJoinEnum,
} from '../../../utils/helpers/shapeEnums';

function SVGGradientFillStyleData(elem, data, styleOb) {
  this.initDynamicPropertyContainer(elem);
  this.getValue = this.iterateDynamicProperties;
  this.initGradientData(elem, data, styleOb);
}

SVGGradientFillStyleData.prototype.initGradientData = function (elem, data, styleOb) {
  this.o = PropertyFactory.getProp(elem, data.o, 0, 0.01, this);
  this.s = PropertyFactory.getProp(elem, data.s, 1, null, this);
  this.e = PropertyFactory.getProp(elem, data.e, 1, null, this);
  this.h = PropertyFactory.getProp(elem, data.h || { k: 0 }, 0, 0.01, this);
  this.a = PropertyFactory.getProp(elem, data.a || { k: 0 }, 0, degToRads, this);
  this.g = new GradientProperty(elem, data.g, this);
  this.style = styleOb;
  this.stops = [];
  this.setGradientData(styleOb.pElem, data);
  this.setGradientOpacity(data, styleOb);
  this._isAnimated = !!this._isAnimated;
};

SVGGradientFillStyleData.prototype.setGradientData = function (pathElement, data) {
  var gradientId = createElementID();
  var gfill = createNS(data.t === 1 ? 'linearGradient' : 'radialGradient');
  gfill.setAttribute('id', gradientId);
  gfill.setAttribute('spreadMethod', 'pad');
  gfill.setAttribute('gradientUnits', 'userSpaceOnUse');
  var stops = [];
  var stop;
  var j;
  var jLen;
  jLen = data.g.p * 4;
  for (j = 0; j < jLen; j += 4) {
    stop = createNS('stop');
    gfill.appendChild(stop);
    stops.push(stop);
  }
  pathElement.setAttribute(data.ty === 'gf' ? 'fill' : 'stroke', 'url(' + getLocationHref() + '#' + gradientId + ')');
  this.gf = gfill;
  this.cst = stops;
};

SVGGradientFillStyleData.prototype.setGradientOpacity = function (data, styleOb) {
  if (this.g._hasOpacity && !this.g._collapsable) {
    var stop;
    var j;
    var jLen;
    var mask = createNS('mask');
    var maskElement = createNS('path');
    mask.appendChild(maskElement);
    var opacityId = createElementID();
    var maskId = createElementID();
    mask.setAttribute('id', maskId);
    var opFill = createNS(data.t === 1 ? 'linearGradient' : 'radialGradient');
    opFill.setAttribute('id', opacityId);
    opFill.setAttribute('spreadMethod', 'pad');
    opFill.setAttribute('gradientUnits', 'userSpaceOnUse');
    jLen = data.g.k.k[0].s ? data.g.k.k[0].s.length : data.g.k.k.length;
    var stops = this.stops;
    for (j = data.g.p * 4; j < jLen; j += 2) {
      stop = createNS('stop');
      stop.setAttribute('stop-color', 'rgb(255,255,255)');
      opFill.appendChild(stop);
      stops.push(stop);
    }
    maskElement.setAttribute(data.ty === 'gf' ? 'fill' : 'stroke', 'url(' + getLocationHref() + '#' + opacityId + ')');
    if (data.ty === 'gs') {
      maskElement.setAttribute('stroke-linecap', lineCapEnum[data.lc || 2]);
      maskElement.setAttribute('stroke-linejoin', lineJoinEnum[data.lj || 2]);
      if (data.lj === 1) {
        maskElement.setAttribute('stroke-miterlimit', data.ml);
      }
    }
    this.of = opFill;
    this.ms = mask;
    this.ost = stops;
    this.maskId = maskId;
    styleOb.msElem = maskElement;
  }
};

extendPrototype([DynamicPropertyContainer], SVGGradientFillStyleData);

export default SVGGradientFillStyleData;