colors_transform/
from_str.rs

1use super::converters::hex_num_to_rgb;
2use super::error::{
3  make_def_parse_err, make_hex_parse_err, make_hsl_parse_err, make_hsla_parse_err,
4  make_rgb_parse_err, make_rgba_parse_err, ParseError,
5};
6use super::{ColorTuple, ColorTupleA};
7
8pub fn hex(s: &str) -> Result<ColorTuple, ParseError> {
9  let mut hex = s.replace("#", "").to_lowercase();
10  let count = hex.chars().count();
11
12  if count == 3 {
13    hex = hex.chars().map(|c| c.to_string().repeat(2)).collect::<Vec<String>>().join("");
14  } else if count != 6 {
15    return Err(make_hex_parse_err(s));
16  }
17
18  match usize::from_str_radix(&hex, 16) {
19    Ok(num) => Ok(hex_num_to_rgb(num)),
20    Err(_) => Err(make_hex_parse_err(s)),
21  }
22}
23
24fn clear_str(s: &str) -> String {
25  let mut result = s.to_lowercase();
26  for p in ["rgba", "rgb", "hsla", "hsl", "(", ")", "%", " "].iter() {
27    result = result.replace(p, "");
28  }
29  result
30}
31
32fn collect_vec_and_parse(s: &str) -> Result<Vec<f32>, std::num::ParseFloatError> {
33  let v = s.split(',').map(|c| c.to_string()).collect::<Vec<String>>();
34
35  let mut units = Vec::new();
36
37  for unit in v {
38    let u = unit.parse::<f32>()?;
39    units.push(u);
40  }
41
42  Ok(units)
43}
44
45fn parse_color_tuple(s: &str) -> Result<ColorTuple, ParseError> {
46  match collect_vec_and_parse(&clear_str(s)) {
47    Ok(num_vec) => {
48      if num_vec.len() != 3 {
49        Err(make_def_parse_err(&s))
50      } else {
51        Ok((num_vec[0], num_vec[1], num_vec[2]))
52      }
53    }
54    Err(_) => Err(make_def_parse_err(&s)),
55  }
56}
57
58fn parse_color_tuple_a(s: &str) -> Result<ColorTupleA, ParseError> {
59  match collect_vec_and_parse(&clear_str(s)) {
60    Ok(num_vec) => {
61      if num_vec.len() != 4 {
62        Err(make_def_parse_err(&s))
63      } else {
64        Ok((num_vec[0], num_vec[1], num_vec[2], num_vec[3]))
65      }
66    }
67    Err(_) => Err(make_def_parse_err(&s)),
68  }
69}
70
71pub fn rgb(s: &str) -> Result<ColorTuple, ParseError> {
72  match parse_color_tuple(s) {
73    Err(_) => Err(make_rgb_parse_err(s)),
74    Ok(rgb) => Ok(rgb),
75  }
76}
77
78pub fn rgba(s: &str) -> Result<ColorTupleA, ParseError> {
79  match parse_color_tuple_a(s) {
80    Err(_) => Err(make_rgba_parse_err(s)),
81    Ok(rgba) => Ok(rgba),
82  }
83}
84
85pub fn hsl(s: &str) -> Result<ColorTuple, ParseError> {
86  match parse_color_tuple(s) {
87    Err(_) => Err(make_hsl_parse_err(s)),
88    Ok(hsl) => Ok(hsl),
89  }
90}
91
92pub fn hsla(s: &str) -> Result<ColorTupleA, ParseError> {
93  match parse_color_tuple_a(s) {
94    Err(_) => Err(make_hsla_parse_err(s)),
95    Ok(hsla) => Ok(hsla),
96  }
97}
colors_transform/from_str.rs

colors_transform/
from_str.rs
