1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
//! ref: composer/vendor/symfony/string/UnicodeString.php
#[derive(Debug, Clone)]
pub struct UnicodeString {
pub(crate) string: String,
}
impl UnicodeString {
// TODO(phase-c): the real constructor runs `normalizer_normalize` (Unicode NFC normalization),
// which has no Rust std equivalent and would need a dedicated normalization implementation.
// Normalization is skipped here, which is only correct for already-NFC input such as ASCII.
pub fn new(string: &str) -> Self {
Self {
string: string.to_string(),
}
}
// TODO(phase-c): ASCII-only provisional implementation. The faithful `width()` uses `wcswidth`
// with the Unicode width tables to treat wide characters as width 2 and skip zero-width /
// combining characters; here every character counts as width 1, correct only for ASCII. The
// ANSI/control-character stripping driven by `ignore_ansi_decoration` is likewise not handled.
pub fn width(&self, _ignore_ansi_decoration: bool) -> i64 {
let s = self.string.replace(['\x00', '\x05', '\x07'], "");
let s = s.replace("\r\n", "\n").replace('\r', "\n");
let mut width: i64 = 0;
for line in s.split('\n') {
let line_width = line.chars().count() as i64;
if line_width > width {
width = line_width;
}
}
width
}
pub fn length(&self) -> i64 {
todo!()
}
pub fn slice(&self, _start: i64, _length: Option<i64>) -> Self {
todo!()
}
}
|
