49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// Process html entity - {, ¯, ", ...
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'use strict';
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var entities = require('../common/entities');
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var has = require('../common/utils').has;
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var isValidEntityCode = require('../common/utils').isValidEntityCode;
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var fromCodePoint = require('../common/utils').fromCodePoint;
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var DIGITAL_RE = /^&#((?:x[a-f0-9]{1,8}|[0-9]{1,8}));/i;
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var NAMED_RE = /^&([a-z][a-z0-9]{1,31});/i;
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module.exports = function entity(state, silent) {
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var ch, code, match, pos = state.pos, max = state.posMax;
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if (state.src.charCodeAt(pos) !== 0x26/* & */) { return false; }
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if (pos + 1 < max) {
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ch = state.src.charCodeAt(pos + 1);
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if (ch === 0x23 /* # */) {
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match = state.src.slice(pos).match(DIGITAL_RE);
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if (match) {
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if (!silent) {
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code = match[1][0].toLowerCase() === 'x' ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10);
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state.pending += isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(0xFFFD);
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}
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state.pos += match[0].length;
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return true;
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}
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} else {
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match = state.src.slice(pos).match(NAMED_RE);
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if (match) {
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if (has(entities, match[1])) {
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if (!silent) { state.pending += entities[match[1]]; }
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state.pos += match[0].length;
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return true;
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}
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}
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}
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}
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if (!silent) { state.pending += '&'; }
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state.pos++;
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return true;
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};
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