mirror of
https://github.com/react/react-native-devtools-frontend.git
synced 2026-10-01 01:38:07 +08:00
Tim van der Lippe
706ec965fb
These packages will be used to dynamically optimize SVG images during the build. R=jacktfranklin@chromium.org Bug: 1216402 Change-Id: I04e95aa7d79c9d67beaf8a7861182c52b16b7d0f Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2939992 Reviewed-by: Jack Franklin <jacktfranklin@chromium.org> Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
74 lines
1.9 KiB
JavaScript
74 lines
1.9 KiB
JavaScript
'use strict';
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const { traverse } = require('../lib/xast.js');
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exports.type = 'full';
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exports.active = true;
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exports.description =
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'remove or cleanup enable-background attribute when possible';
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/**
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* Remove or cleanup enable-background attr which coincides with a width/height box.
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*
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* @see https://www.w3.org/TR/SVG11/filters.html#EnableBackgroundProperty
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*
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* @example
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* <svg width="100" height="50" enable-background="new 0 0 100 50">
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* ⬇
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* <svg width="100" height="50">
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*
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* @param {Object} root current iteration item
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* @return {Boolean} if false, item will be filtered out
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*
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* @author Kir Belevich
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*/
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exports.fn = function (root) {
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const regEnableBackground = /^new\s0\s0\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)$/;
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let hasFilter = false;
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const elems = ['svg', 'mask', 'pattern'];
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traverse(root, (node) => {
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if (node.type === 'element') {
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if (
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elems.includes(node.name) &&
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node.attributes['enable-background'] != null &&
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node.attributes.width != null &&
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node.attributes.height != null
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) {
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const match = node.attributes['enable-background'].match(
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regEnableBackground
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);
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if (match) {
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if (
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node.attributes.width === match[1] &&
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node.attributes.height === match[3]
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) {
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if (node.name === 'svg') {
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delete node.attributes['enable-background'];
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} else {
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node.attributes['enable-background'] = 'new';
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}
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}
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}
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}
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if (node.name === 'filter') {
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hasFilter = true;
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}
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}
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});
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if (hasFilter === false) {
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traverse(root, (node) => {
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if (node.type === 'element') {
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//we don't need 'enable-background' if we have no filters
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delete node.attributes['enable-background'];
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}
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});
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}
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return root;
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};
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