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terminal-cv/node_modules/svgo/plugins/removeUselessDefs.js

65 lines
1.7 KiB

'use strict';
/**
* @typedef {import('../lib/types').XastElement} XastElement
*/
const { detachNodeFromParent } = require('../lib/xast.js');
const { elemsGroups } = require('./_collections.js');
exports.type = 'visitor';
exports.name = 'removeUselessDefs';
exports.active = true;
exports.description = 'removes elements in <defs> without id';
/**
* Removes content of defs and properties that aren't rendered directly without ids.
*
* @author Lev Solntsev
*
* @type {import('../lib/types').Plugin<void>}
*/
exports.fn = () => {
return {
element: {
enter: (node, parentNode) => {
if (node.name === 'defs') {
/**
* @type {Array<XastElement>}
*/
const usefulNodes = [];
collectUsefulNodes(node, usefulNodes);
if (usefulNodes.length === 0) {
detachNodeFromParent(node, parentNode);
}
// TODO remove in SVGO 3
for (const usefulNode of usefulNodes) {
// @ts-ignore parentNode is legacy
usefulNode.parentNode = node;
}
node.children = usefulNodes;
} else if (
elemsGroups.nonRendering.includes(node.name) &&
node.attributes.id == null
) {
detachNodeFromParent(node, parentNode);
}
},
},
};
};
/**
* @type {(node: XastElement, usefulNodes: Array<XastElement>) => void}
*/
const collectUsefulNodes = (node, usefulNodes) => {
for (const child of node.children) {
if (child.type === 'element') {
if (child.attributes.id != null || child.name === 'style') {
usefulNodes.push(child);
} else {
collectUsefulNodes(child, usefulNodes);
}
}
}
};