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51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
import { detachNodeFromParent } from '../lib/xast.js';
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import { elemsGroups } from './_collections.js';
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export const name = 'removeUselessDefs';
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export const description = 'removes elements in <defs> without id';
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/**
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* Removes content of defs and properties that aren't rendered directly without ids.
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*
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* @author Lev Solntsev
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*
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* @type {import('../lib/types.js').Plugin}
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*/
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export const fn = () => {
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return {
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element: {
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enter: (node, parentNode) => {
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if (
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node.name === 'defs' ||
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(elemsGroups.nonRendering.has(node.name) &&
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node.attributes.id == null)
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) {
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/** @type {import('../lib/types.js').XastElement[]} */
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const usefulNodes = [];
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collectUsefulNodes(node, usefulNodes);
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if (usefulNodes.length === 0) {
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detachNodeFromParent(node, parentNode);
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}
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node.children = usefulNodes;
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}
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},
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},
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};
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};
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/**
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* @param {import('../lib/types.js').XastElement} node
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* @param {import('../lib/types.js').XastElement[]} usefulNodes
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*/
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const collectUsefulNodes = (node, usefulNodes) => {
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for (const child of node.children) {
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if (child.type === 'element') {
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if (child.attributes.id != null || child.name === 'style') {
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usefulNodes.push(child);
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} else {
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collectUsefulNodes(child, usefulNodes);
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}
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}
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}
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};
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