rustyle_css/
parser.rs

1use lightningcss::{
2    stylesheet::{ParserOptions, PrinterOptions, StyleSheet},
3    targets::Browsers,
4};
5
6/// Parse and process CSS using lightningcss
7pub struct CssParser;
8
9impl CssParser {
10    /// Parse CSS string and return processed CSS
11    pub fn parse(css: &str) -> Result<String, String> {
12        let stylesheet = StyleSheet::parse(
13            css,
14            ParserOptions {
15                filename: "style.css".to_string(),
16                ..Default::default()
17            },
18        )
19        .map_err(|e| format!("CSS parsing error: {:?}", e))?;
20
21        let targets = Browsers::default();
22        let printer_options = PrinterOptions {
23            minify: false,
24            targets: targets.into(),
25            ..Default::default()
26        };
27
28        let result = stylesheet
29            .to_css(printer_options)
30            .map_err(|e| format!("CSS generation error: {:?}", e))?;
31
32        Ok(result.code)
33    }
34
35    /// Parse and minify CSS
36    pub fn parse_minified(css: &str) -> Result<String, String> {
37        let stylesheet = StyleSheet::parse(
38            css,
39            ParserOptions {
40                filename: "style.css".to_string(),
41                ..Default::default()
42            },
43        )
44        .map_err(|e| format!("CSS parsing error: {:?}", e))?;
45
46        let targets = Browsers::default();
47        let printer_options = PrinterOptions {
48            minify: true,
49            targets: targets.into(),
50            ..Default::default()
51        };
52
53        let result = stylesheet
54            .to_css(printer_options)
55            .map_err(|e| format!("CSS generation error: {:?}", e))?;
56
57        Ok(result.code)
58    }
59}
60
61#[cfg(test)]
62mod tests {
63    use super::*;
64
65    #[test]
66    fn test_parse_simple_css() {
67        let css = ".button { color: red; }";
68        let result = CssParser::parse(css);
69        assert!(result.is_ok());
70    }
71
72    #[test]
73    fn test_parse_nested_css() {
74        let css = r#"
75            .button {
76                color: red;
77                &:hover {
78                    color: blue;
79                }
80            }
81        "#;
82        let result = CssParser::parse(css);
83        assert!(result.is_ok());
84    }
85}
rustyle_css/parser.rs

rustyle_css/
parser.rs
