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// Parse link destination
//
import { unescapeAll } from '../common/utils.mjs'
export default function parseLinkDestination (str, start, max) {
let code
let pos = start
const 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 */) { return result }
if (code === 0x3C /* < */) { 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
let 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) {
if (str.charCodeAt(pos + 1) === 0x20) { break }
pos += 2
continue
}
if (code === 0x28 /* ( */) {
level++
if (level > 32) { return result }
}
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.pos = pos
result.ok = true
return result
}