33 lines
1,006 B
JavaScript
33 lines
1,006 B
JavaScript
'use strict';
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var punycode = require('punycode/');
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var entities = require('./entities.json');
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module.exports = function decode(str) {
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if (typeof str !== 'string') {
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throw new TypeError('Expected a String');
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}
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return str.replace(/&(#?[^;\W]+;?)/g, function (_, match) {
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var m = (/^#(\d+);?$/).exec(match);
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if (m) {
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return punycode.ucs2.encode([parseInt(m[1], 10)]);
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}
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var m2 = (/^#[Xx]([A-Fa-f0-9]+);?/).exec(match);
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if (m2) {
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return punycode.ucs2.encode([parseInt(m2[1], 16)]);
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}
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// named entity
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var hasSemi = (/;$/).test(match);
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var withoutSemi = hasSemi ? match.replace(/;$/, '') : match;
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var target = entities[withoutSemi] || (hasSemi && entities[match]);
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if (typeof target === 'number') {
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return punycode.ucs2.encode([target]);
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} else if (typeof target === 'string') {
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return target;
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}
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return '&' + match;
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});
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};
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