source: trip-planner-front/node_modules/svgo/plugins/cleanupEnableBackground.js@ 6fe77af

Last change on this file since 6fe77af was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
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1'use strict';
2
3const { visit } = require('../lib/xast.js');
4
5exports.type = 'visitor';
6exports.name = 'cleanupEnableBackground';
7exports.active = true;
8exports.description =
9 'remove or cleanup enable-background attribute when possible';
10
11/**
12 * Remove or cleanup enable-background attr which coincides with a width/height box.
13 *
14 * @see https://www.w3.org/TR/SVG11/filters.html#EnableBackgroundProperty
15 *
16 * @example
17 * <svg width="100" height="50" enable-background="new 0 0 100 50">
18 * ⬇
19 * <svg width="100" height="50">
20 *
21 * @author Kir Belevich
22 *
23 * @type {import('../lib/types').Plugin<void>}
24 */
25exports.fn = (root) => {
26 const regEnableBackground =
27 /^new\s0\s0\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)$/;
28
29 let hasFilter = false;
30 visit(root, {
31 element: {
32 enter: (node) => {
33 if (node.name === 'filter') {
34 hasFilter = true;
35 }
36 },
37 },
38 });
39
40 return {
41 element: {
42 enter: (node) => {
43 if (node.attributes['enable-background'] == null) {
44 return;
45 }
46 if (hasFilter) {
47 if (
48 (node.name === 'svg' ||
49 node.name === 'mask' ||
50 node.name === 'pattern') &&
51 node.attributes.width != null &&
52 node.attributes.height != null
53 ) {
54 const match =
55 node.attributes['enable-background'].match(regEnableBackground);
56 if (
57 match != null &&
58 node.attributes.width === match[1] &&
59 node.attributes.height === match[3]
60 ) {
61 if (node.name === 'svg') {
62 delete node.attributes['enable-background'];
63 } else {
64 node.attributes['enable-background'] = 'new';
65 }
66 }
67 }
68 } else {
69 //we don't need 'enable-background' if we have no filters
70 delete node.attributes['enable-background'];
71 }
72 },
73 },
74 };
75};
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