source: trip-planner-front/node_modules/svgo/plugins/removeEmptyContainers.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1'use strict';
2
3const { detachNodeFromParent } = require('../lib/xast.js');
4const { elemsGroups } = require('./_collections.js');
5
6exports.type = 'visitor';
7exports.name = 'removeEmptyContainers';
8exports.active = true;
9exports.description = 'removes empty container elements';
10
11/**
12 * Remove empty containers.
13 *
14 * @see https://www.w3.org/TR/SVG11/intro.html#TermContainerElement
15 *
16 * @example
17 * <defs/>
18 *
19 * @example
20 * <g><marker><a/></marker></g>
21 *
22 * @author Kir Belevich
23 *
24 * @type {import('../lib/types').Plugin<void>}
25 */
26exports.fn = () => {
27 return {
28 element: {
29 exit: (node, parentNode) => {
30 // remove only empty non-svg containers
31 if (
32 node.name === 'svg' ||
33 elemsGroups.container.includes(node.name) === false ||
34 node.children.length !== 0
35 ) {
36 return;
37 }
38 // empty patterns may contain reusable configuration
39 if (
40 node.name === 'pattern' &&
41 Object.keys(node.attributes).length !== 0
42 ) {
43 return;
44 }
45 // The <g> may not have content, but the filter may cause a rectangle
46 // to be created and filled with pattern.
47 if (node.name === 'g' && node.attributes.filter != null) {
48 return;
49 }
50 // empty <mask> hides masked element
51 if (node.name === 'mask' && node.attributes.id != null) {
52 return;
53 }
54 detachNodeFromParent(node, parentNode);
55 },
56 },
57 };
58};
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