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58 lines
1.4 KiB
58 lines
1.4 KiB
'use strict';
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const { detachNodeFromParent } = require('../lib/xast.js');
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exports.name = 'removeEmptyText';
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exports.type = 'visitor';
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exports.active = true;
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exports.description = 'removes empty <text> elements';
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/**
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* Remove empty Text elements.
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*
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* @see https://www.w3.org/TR/SVG11/text.html
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*
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* @example
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* Remove empty text element:
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* <text/>
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*
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* Remove empty tspan element:
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* <tspan/>
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*
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* Remove tref with empty xlink:href attribute:
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* <tref xlink:href=""/>
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*
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* @author Kir Belevich
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*
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* @type {import('../lib/types').Plugin<{
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* text?: boolean,
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* tspan?: boolean,
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* tref?: boolean
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* }>}
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*/
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exports.fn = (root, params) => {
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const { text = true, tspan = true, tref = true } = params;
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return {
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element: {
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enter: (node, parentNode) => {
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// Remove empty text element
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if (text && node.name === 'text' && node.children.length === 0) {
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detachNodeFromParent(node, parentNode);
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}
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// Remove empty tspan element
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if (tspan && node.name === 'tspan' && node.children.length === 0) {
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detachNodeFromParent(node, parentNode);
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}
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// Remove tref with empty xlink:href attribute
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if (
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tref &&
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node.name === 'tref' &&
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node.attributes['xlink:href'] == null
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) {
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detachNodeFromParent(node, parentNode);
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}
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},
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},
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};
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};
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