56 lines
1.1 KiB
JavaScript
56 lines
1.1 KiB
JavaScript
// 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;
|
|
};
|