1 use {
2 super::*,
3 crate::errors::InvalidSkinError,
4 crossterm::style::{
5 Color::{self, *},
6 },
7 lazy_regex::regex_captures,
8 };
9
10 /// read a color from a string.
11 /// It may be either
12 /// - "none"
13 /// - one of the few known color name. Example: "darkred"
14 /// - grayscale with level in [0,24[. Example: "grey(5)"
15 /// - an Ansi code. Example "ansi(106)"
16 /// - RGB. Example: "rgb(25, 100, 0)"
17 /// This function needs a lowercase string (assuming lowercasing
18 /// has be done before, to ensure case-insensitive parsing)
parse(s: &str) -> Result<Option<Color>, InvalidSkinError>19 pub fn parse(s: &str) -> Result<Option<Color>, InvalidSkinError> {
20 if let Some((_, value)) = regex_captures!(r"^ansi\((?P<value>\d+)\)$", s) {
21 let value = value.parse();
22 if let Ok(value) = value {
23 return Ok(ansi(value)); // all ANSI values are ok
24 } else {
25 return Err(InvalidSkinError::InvalidColor { raw: s.to_owned() });
26 }
27 }
28
29 if let Some((_, level)) = regex_captures!(r"^gr[ae]y(?:scale)?\((?P<level>\d+)\)$", s) {
30 let level = level.parse();
31 if let Ok(level) = level {
32 if level > 23 {
33 return Err(InvalidSkinError::InvalidGreyLevel { level });
34 }
35 return Ok(gray(level));
36 } else {
37 return Err(InvalidSkinError::InvalidColor { raw: s.to_owned() });
38 }
39 }
40
41 if let Some((_, r, g, b)) = regex_captures!(r"^rgb\((?P<r>\d+),\s*(?P<g>\d+),\s*(?P<b>\d+)\)$", s) {
42 if let (Ok(r), Ok(g), Ok(b)) = (r.parse(), g.parse(), b.parse()) {
43 return Ok(rgb(r, g, b));
44 } else {
45 return Err(InvalidSkinError::InvalidColor { raw: s.to_owned() });
46 }
47 }
48
49 match s {
50 "black" => Ok(Some(AnsiValue(16))),
51 "blue" => Ok(Some(Blue)),
52 "cyan" => Ok(Some(Cyan)),
53 "darkblue" => Ok(Some(DarkBlue)),
54 "darkcyan" => Ok(Some(DarkCyan)),
55 "darkgreen" => Ok(Some(DarkGreen)),
56 "darkmagenta" => Ok(Some(DarkMagenta)),
57 "darkred" => Ok(Some(DarkRed)),
58 "green" => Ok(Some(Green)),
59 "grey" => Ok(Some(Grey)),
60 "magenta" => Ok(Some(Magenta)),
61 "red" => Ok(Some(Red)),
62 "yellow" => Ok(Some(Yellow)),
63 "darkyellow" => Ok(Some(DarkYellow)),
64 "white" => Ok(Some(AnsiValue(231))),
65 "none" => Ok(None),
66 _ => Err(InvalidSkinError::InvalidColor { raw: s.to_owned() }),
67 }
68 }
69
70