vtcode_tui/core_tui/session/
wrapping.rs

1//! URL and path-preserving text wrapping.
2//!
3//! Wraps text while keeping URLs and file paths as atomic units to preserve
4//! terminal link detection and transcript file hit-testing.
5
6use ratatui::prelude::*;
7use ratatui::widgets::Paragraph;
8use regex::Regex;
9use std::sync::LazyLock;
10use unicode_width::UnicodeWidthStr;
11
12/// URL/file token detection pattern - matches common URL formats and path-like tokens.
13static PRESERVED_TOKEN_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
14    Regex::new(
15        r#"[a-zA-Z][a-zA-Z0-9+.-]*://[^\s<>\[\]{}|^]+|[a-zA-Z0-9][-a-zA-Z0-9]*\.[a-zA-Z]{2,}(/[^\s<>\[\]{}|^]*)?|localhost:\d+|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(:\d+)?|`(?:file://|~/|/|\./|\.\./|[A-Za-z]:[\\/]|[A-Za-z0-9._-]+[\\/])[^`]+`|"(?:file://|~/|/|\./|\.\./|[A-Za-z]:[\\/]|[A-Za-z0-9._-]+[\\/])[^"]+"|'(?:file://|~/|/|\./|\.\./|[A-Za-z]:[\\/]|[A-Za-z0-9._-]+[\\/])[^']+'|(?:\./|\../|~/|/)[^\s<>\[\]{}|^]+|(?:[A-Za-z]:[\\/][^\s<>\[\]{}|^]+)|(?:[A-Za-z0-9._-]+[\\/][^\s<>\[\]{}|^]+)"#,
16    )
17    .unwrap()
18});
19
20/// Check if text contains a preserved URL/path token.
21pub fn contains_preserved_token(text: &str) -> bool {
22    PRESERVED_TOKEN_PATTERN.is_match(text)
23}
24
25/// Wrap a line, preserving URLs as atomic units.
26///
27/// - Lines without URLs: delegated to standard wrapping
28/// - URL-only lines: returned unwrapped if they fit
29/// - Mixed lines: URLs kept intact, surrounding text wrapped normally
30pub fn wrap_line_preserving_urls(line: Line<'static>, max_width: usize) -> Vec<Line<'static>> {
31    if max_width == 0 {
32        return vec![Line::default()];
33    }
34
35    let text: String = line.spans.iter().map(|s| s.content.as_ref()).collect();
36
37    // No URLs - use standard wrapping (delegates to text_utils)
38    if !contains_preserved_token(&text) {
39        return super::text_utils::wrap_line(line, max_width);
40    }
41
42    // Find all preserved tokens in the text
43    let urls: Vec<_> = PRESERVED_TOKEN_PATTERN
44        .find_iter(&text)
45        .map(|m| (m.start(), m.end(), m.as_str()))
46        .collect();
47
48    // Single URL that fits - return unwrapped for terminal link detection
49    if urls.len() == 1 && urls[0].0 == 0 && urls[0].1 == text.len() && text.width() <= max_width {
50        return vec![line];
51    }
52    // URL too wide - fall through to wrap it
53
54    // Mixed content - split around URLs and wrap each segment
55    wrap_mixed_content(line, max_width, &urls)
56}
57
58/// Wrap text that contains URLs, keeping URLs intact.
59fn wrap_mixed_content(
60    line: Line<'static>,
61    max_width: usize,
62    urls: &[(usize, usize, &str)],
63) -> Vec<Line<'static>> {
64    use unicode_segmentation::UnicodeSegmentation;
65    use unicode_width::UnicodeWidthStr;
66
67    let mut result = Vec::new();
68    let mut current_line: Vec<Span<'static>> = Vec::new();
69    let mut current_width = 0usize;
70    let mut text_pos = 0usize;
71
72    let flush_line = |spans: &mut Vec<Span<'static>>, result: &mut Vec<Line<'static>>| {
73        if spans.is_empty() {
74            result.push(Line::default());
75        } else {
76            result.push(Line::from(std::mem::take(spans)));
77        }
78    };
79
80    // Merge spans into a single style for simplicity when dealing with URLs
81    let default_style = line.spans.first().map(|s| s.style).unwrap_or_default();
82
83    for (url_start, url_end, url_text) in urls {
84        // Process text before this URL
85        if *url_start > text_pos {
86            let before = &line
87                .spans
88                .iter()
89                .map(|s| s.content.as_ref())
90                .collect::<String>()[text_pos..*url_start];
91
92            for grapheme in UnicodeSegmentation::graphemes(before, true) {
93                let gw = grapheme.width();
94                if current_width + gw > max_width && current_width > 0 {
95                    flush_line(&mut current_line, &mut result);
96                    current_width = 0;
97                }
98                current_line.push(Span::styled(grapheme.to_string(), default_style));
99                current_width += gw;
100            }
101        }
102
103        // Add URL as atomic unit
104        let url_width = url_text.width();
105        if current_width > 0 && current_width + url_width > max_width {
106            flush_line(&mut current_line, &mut result);
107            current_width = 0;
108        }
109        current_line.push(Span::styled(url_text.to_string(), default_style));
110        current_width += url_width;
111
112        text_pos = *url_end;
113    }
114
115    // Process remaining text after last URL
116    if text_pos < line.spans.iter().map(|s| s.content.len()).sum::<usize>() {
117        let full_text: String = line.spans.iter().map(|s| s.content.as_ref()).collect();
118        let remaining = &full_text[text_pos..];
119
120        for grapheme in UnicodeSegmentation::graphemes(remaining, true) {
121            let gw = grapheme.width();
122            if current_width + gw > max_width && current_width > 0 {
123                flush_line(&mut current_line, &mut result);
124                current_width = 0;
125            }
126            current_line.push(Span::styled(grapheme.to_string(), default_style));
127            current_width += gw;
128        }
129    }
130
131    flush_line(&mut current_line, &mut result);
132    if result.is_empty() {
133        result.push(Line::default());
134    }
135    result
136}
137
138/// Wrap multiple lines with URL preservation.
139pub fn wrap_lines_preserving_urls(
140    lines: Vec<Line<'static>>,
141    max_width: usize,
142) -> Vec<Line<'static>> {
143    if max_width == 0 {
144        return vec![Line::default()];
145    }
146    lines
147        .into_iter()
148        .flat_map(|line| wrap_line_preserving_urls(line, max_width))
149        .collect()
150}
151
152/// Calculate wrapped height using Paragraph::line_count.
153pub fn calculate_wrapped_height(text: &str, width: u16) -> usize {
154    if width == 0 {
155        return text.lines().count().max(1);
156    }
157    Paragraph::new(text).line_count(width)
158}
159
160#[cfg(test)]
161mod tests {
162    use super::*;
163
164    #[test]
165    fn test_url_detection() {
166        assert!(contains_preserved_token("https://example.com"));
167        assert!(contains_preserved_token("example.com/path"));
168        assert!(contains_preserved_token("localhost:8080"));
169        assert!(contains_preserved_token("192.168.1.1:8080"));
170        assert!(!contains_preserved_token("not a url"));
171    }
172
173    #[test]
174    fn test_file_path_detection() {
175        assert!(contains_preserved_token("src/main.rs"));
176        assert!(contains_preserved_token("./src/main.rs"));
177        assert!(contains_preserved_token("/tmp/example.txt"));
178        assert!(contains_preserved_token("\"./docs/My Notes.md\""));
179        assert!(contains_preserved_token(
180            "`/Users/example/Library/Application Support/Code/User/settings.json`"
181        ));
182    }
183
184    #[test]
185    fn test_url_only_preserved() {
186        let line = Line::from(Span::raw("https://example.com"));
187        let wrapped = wrap_line_preserving_urls(line, 80);
188        assert_eq!(wrapped.len(), 1);
189        assert!(
190            wrapped[0]
191                .spans
192                .iter()
193                .any(|s| s.content.contains("https://"))
194        );
195    }
196
197    #[test]
198    fn test_mixed_content() {
199        let line = Line::from(Span::raw("See https://example.com for info"));
200        let wrapped = wrap_line_preserving_urls(line, 25);
201        let all_text: String = wrapped
202            .iter()
203            .flat_map(|l| l.spans.iter().map(|s| s.content.as_ref()))
204            .collect();
205        assert!(all_text.contains("https://example.com"));
206        assert!(all_text.contains("See"));
207    }
208
209    #[test]
210    fn test_quoted_path_with_spaces_is_preserved() {
211        let line = Line::from(Span::raw("Open \"./docs/My Notes.md\" for details"));
212        let wrapped = wrap_line_preserving_urls(line, 18);
213        let all_text: String = wrapped
214            .iter()
215            .flat_map(|line| line.spans.iter().map(|span| span.content.as_ref()))
216            .collect();
217
218        assert!(all_text.contains("\"./docs/My Notes.md\""));
219    }
220
221    #[test]
222    fn test_no_url_delegates() {
223        let line = Line::from(Span::raw("Regular text without URLs"));
224        let wrapped = wrap_line_preserving_urls(line, 10);
225        assert!(!wrapped.is_empty());
226    }
227}
vtcode_tui/core_tui/session/wrapping.rs

vtcode_tui/core_tui/session/
wrapping.rs
