umd 0.1.0

Universal Markdown - A post-Markdown superset with Bootstrap 5 integration and extensible syntax
Documentation 
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208

//! Extended syntax for Universal Markdown
//!
//! This module provides extended syntax support including Bootstrap 5 integration,
//! semantic HTML elements, definition lists, and LukiWiki legacy compatibility.

pub mod block_decorations;
pub mod code_block;
pub mod conflict_resolver;
pub mod emphasis;
pub mod inline_decorations;
pub mod media;
pub mod nested_blocks;
pub mod plugin_markers;
pub mod plugins;
pub mod preprocessor;
pub mod table;

/// Apply extended syntax transformations to HTML output
///
/// This function processes the HTML output from the Markdown parser and applies
/// extended syntax transformations including Bootstrap integration.
///
/// # Arguments
///
/// * `html` - The HTML output from the Markdown parser
///
/// # Returns
///
/// Transformed HTML with extended syntax applied
pub fn apply_extensions(html: &str) -> String {
    let header_map = conflict_resolver::HeaderIdMap::new();
    let options = crate::parser::ParserOptions::default();
    apply_extensions_with_headers(html, &header_map, &options)
}

/// Apply extended syntax transformations with custom header IDs
///
/// # Arguments
///
/// * `html` - The HTML output from the Markdown parser
/// * `header_map` - Map of custom header IDs
///
/// # Returns
///
/// Transformed HTML with extended syntax and custom header IDs applied
pub fn apply_extensions_with_headers(
    html: &str,
    header_map: &conflict_resolver::HeaderIdMap,
    options: &crate::parser::ParserOptions,
) -> String {
    let mut result = html.to_string();

    // Protect code blocks and inline code from transformation
    let (protected, placeholders) = protect_code_sections(&result);
    result = protected;

    // Apply transformations in order
    // Note: Plugins are handled in conflict_resolver::postprocess_conflicts
    result = media::transform_images_to_media(&result);
    result = conflict_resolver::postprocess_conflicts(&result, header_map);
    result = emphasis::apply_umd_emphasis(&result);
    result = block_decorations::apply_block_placement(&result); // Apply block placement first
    result = block_decorations::apply_block_decorations(&result);
    result = inline_decorations::apply_inline_decorations(&result);

    // Apply base URL resolution to links
    if let Some(base_url) = &options.base_url {
        result = conflict_resolver::apply_base_url_to_links(&result, base_url);
    }

    // Restore protected code sections
    restore_code_sections(&result, &placeholders)
}

/// Protect code blocks and inline code from transformation
///
/// Returns the HTML with code sections replaced by placeholders,
/// and a vector of the original code sections.
fn protect_code_sections(html: &str) -> (String, Vec<String>) {
    use regex::Regex;

    let mut placeholders = Vec::new();
    let mut result = html.to_string();

    // Protect <pre><code>...</code></pre> blocks
    let code_block_re = Regex::new(r"<pre><code[^>]*>[\s\S]*?</code></pre>").unwrap();
    result = code_block_re
        .replace_all(&result, |caps: &regex::Captures| {
            let index = placeholders.len();
            placeholders.push(caps[0].to_string());
            format!("<!--CODE_BLOCK_{}-->", index)
        })
        .to_string();

    // Protect <code>...</code> inline
    let inline_code_re = Regex::new(r"<code[^>]*>[^<]*</code>").unwrap();
    result = inline_code_re
        .replace_all(&result, |caps: &regex::Captures| {
            let index = placeholders.len();
            placeholders.push(caps[0].to_string());
            format!("<!--INLINE_CODE_{}-->", index)
        })
        .to_string();

    (result, placeholders)
}

/// Restore protected code sections
fn restore_code_sections(html: &str, placeholders: &[String]) -> String {
    use regex::Regex;

    let mut result = html.to_string();

    // Restore code blocks
    let placeholder_re = Regex::new(r"<!--(CODE_BLOCK|INLINE_CODE)_(\d+)-->").unwrap();
    result = placeholder_re
        .replace_all(&result, |caps: &regex::Captures| {
            let section_type = caps.get(1).map(|m| m.as_str()).unwrap_or("");
            let index: usize = caps[2].parse().unwrap();
            let original = placeholders.get(index).map(|s| s.as_str()).unwrap_or("");

            if section_type == "INLINE_CODE" {
                enhance_inline_code_color_sample(original)
            } else {
                original.to_string()
            }
        })
        .to_string();

    // Apply code block enhancements (syntax highlighting, Mermaid, filenames)
    result = code_block::process_code_blocks(&result);

    result
}

fn enhance_inline_code_color_sample(inline_code_html: &str) -> String {
    use once_cell::sync::Lazy;
    use regex::Regex;

    static INLINE_CODE_TAG_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(r#"^<code(?P<attrs>[^>]*)>(?P<content>[^<]*)</code>$"#)
            .expect("valid inline code tag regex")
    });
    static HEX_COLOR_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(r"(?i)^#(?:[0-9a-f]{3}|[0-9a-f]{4}|[0-9a-f]{6}|[0-9a-f]{8})$")
            .expect("valid hex color regex")
    });
    static RGB_COLOR_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(
            r"(?i)^rgb\(\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*,\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*,\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*\)$",
        )
        .expect("valid rgb color regex")
    });
    static RGBA_COLOR_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(
            r"(?i)^rgba\(\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*,\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*,\s*(?:25[0-5]|2[0-4]\d|1?\d?\d)\s*,\s*(?:0|1|0?\.\d+|1(?:\.0+)?)\s*\)$",
        )
        .expect("valid rgba color regex")
    });
    static HSL_COLOR_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(
            r"(?i)^hsl\(\s*(?:360|3[0-5]\d|[12]?\d?\d)\s*,\s*(?:100|[1-9]?\d)%\s*,\s*(?:100|[1-9]?\d)%\s*\)$",
        )
        .expect("valid hsl color regex")
    });
    static HSLA_COLOR_RE: Lazy<Regex> = Lazy::new(|| {
        Regex::new(
            r"(?i)^hsla\(\s*(?:360|3[0-5]\d|[12]?\d?\d)\s*,\s*(?:100|[1-9]?\d)%\s*,\s*(?:100|[1-9]?\d)%\s*,\s*(?:0|1|0?\.\d+|1(?:\.0+)?)\s*\)$",
        )
        .expect("valid hsla color regex")
    });

    let Some(caps) = INLINE_CODE_TAG_RE.captures(inline_code_html) else {
        return inline_code_html.to_string();
    };

    let attrs = caps.name("attrs").map(|m| m.as_str()).unwrap_or("");
    let content = caps.name("content").map(|m| m.as_str()).unwrap_or("");
    let color_text = content.trim();

    let is_color_code = HEX_COLOR_RE.is_match(color_text)
        || RGB_COLOR_RE.is_match(color_text)
        || RGBA_COLOR_RE.is_match(color_text)
        || HSL_COLOR_RE.is_match(color_text)
        || HSLA_COLOR_RE.is_match(color_text);

    if !is_color_code {
        return inline_code_html.to_string();
    }

    format!(
        r#"<code{}>{}<span class="inline-code-color" style="background-color: {};"></span></code>"#,
        attrs, content, color_text
    )
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_umd_syntax_integration() {
        let input = "<p>This is ''bold'' and '''italic'''</p>";
        let output = apply_extensions(input);
        assert!(output.contains("<b>bold</b>"));
        assert!(output.contains("<i>italic</i>"));
    }
}