devsite/node_modules/markdown-it/lib/helpers/parse_link_title.js

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2024-07-08 01:49:38 +00:00
// Parse link title
//
'use strict';
var unescapeAll = require('../common/utils').unescapeAll;
module.exports = function parseLinkTitle(str, start, max) {
var code,
marker,
lines = 0,
pos = start,
result = {
ok: false,
pos: 0,
lines: 0,
str: ''
};
if (pos >= max) { return result; }
marker = str.charCodeAt(pos);
if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return result; }
pos++;
// if opening marker is "(", switch it to closing marker ")"
if (marker === 0x28) { marker = 0x29; }
while (pos < max) {
code = str.charCodeAt(pos);
if (code === marker) {
result.pos = pos + 1;
result.lines = lines;
result.str = unescapeAll(str.slice(start + 1, pos));
result.ok = true;
return result;
} else if (code === 0x28 /* ( */ && marker === 0x29 /* ) */) {
return result;
} else if (code === 0x0A) {
lines++;
} else if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
if (str.charCodeAt(pos) === 0x0A) {
lines++;
}
}
pos++;
}
return result;
};