290144e9
 易尊强
第一次
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// Parse link destination
//
'use strict';
var isSpace = require('../common/utils').isSpace;
var unescapeAll = require('../common/utils').unescapeAll;
module.exports = function parseLinkDestination(str, pos, max) {
var code, level,
lines = 0,
start = pos,
result = {
ok: false,
pos: 0,
lines: 0,
str: ''
};
if (str.charCodeAt(pos) === 0x3C /* < */) {
pos++;
while (pos < max) {
code = str.charCodeAt(pos);
if (code === 0x0A /* \n */ || isSpace(code)) { return result; }
if (code === 0x3E /* > */) {
result.pos = pos + 1;
result.str = unescapeAll(str.slice(start + 1, pos));
result.ok = true;
return result;
}
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos += 2;
continue;
}
pos++;
}
// no closing '>'
return result;
}
// this should be ... } else { ... branch
level = 0;
while (pos < max) {
code = str.charCodeAt(pos);
if (code === 0x20) { break; }
// ascii control characters
if (code < 0x20 || code === 0x7F) { break; }
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos += 2;
continue;
}
if (code === 0x28 /* ( */) {
level++;
}
if (code === 0x29 /* ) */) {
if (level === 0) { break; }
level--;
}
pos++;
}
if (start === pos) { return result; }
if (level !== 0) { return result; }
result.str = unescapeAll(str.slice(start, pos));
result.lines = lines;
result.pos = pos;
result.ok = true;
return result;
};
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