56 lines
1.1 KiB
JavaScript
56 lines
1.1 KiB
JavaScript
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// Parse link title
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//
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'use strict';
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var unescapeAll = require('../common/utils').unescapeAll;
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module.exports = function parseLinkTitle(str, start, max) {
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var code,
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marker,
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lines = 0,
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pos = start,
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result = {
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ok: false,
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pos: 0,
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lines: 0,
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str: ''
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};
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if (pos >= max) { return result; }
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marker = str.charCodeAt(pos);
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if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return result; }
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pos++;
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// if opening marker is "(", switch it to closing marker ")"
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if (marker === 0x28) { marker = 0x29; }
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while (pos < max) {
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code = str.charCodeAt(pos);
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if (code === marker) {
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result.pos = pos + 1;
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result.lines = lines;
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result.str = unescapeAll(str.slice(start + 1, pos));
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result.ok = true;
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return result;
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} else if (code === 0x28 /* ( */ && marker === 0x29 /* ) */) {
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return result;
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} else if (code === 0x0A) {
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lines++;
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} else if (code === 0x5C /* \ */ && pos + 1 < max) {
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pos++;
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if (str.charCodeAt(pos) === 0x0A) {
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lines++;
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}
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}
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pos++;
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}
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return result;
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};
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