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, &text, max_width, &urls)
56}
57
58/// Wrap text that contains URLs, keeping URLs intact.
59fn wrap_mixed_content(
60    line: Line<'static>,
61    text: &str,
62    max_width: usize,
63    urls: &[(usize, usize, &str)],
64) -> Vec<Line<'static>> {
65    use unicode_segmentation::UnicodeSegmentation;
66    use unicode_width::UnicodeWidthStr;
67
68    let mut result = Vec::with_capacity(urls.len() + 1);
69    let mut current_line: Vec<Span<'static>> = Vec::new();
70    let mut current_width = 0usize;
71    let mut text_pos = 0usize;
72
73    let flush_line = |spans: &mut Vec<Span<'static>>, result: &mut Vec<Line<'static>>| {
74        if spans.is_empty() {
75            result.push(Line::default());
76        } else {
77            result.push(Line::from(std::mem::take(spans)));
78        }
79    };
80
81    // Merge spans into a single style for simplicity when dealing with URLs
82    let default_style = line.spans.first().map(|s| s.style).unwrap_or_default();
83
84    for (url_start, url_end, url_text) in urls {
85        // Process text before this URL
86        if *url_start > text_pos {
87            let before = &text[text_pos..*url_start];
88
89            for grapheme in UnicodeSegmentation::graphemes(before, true) {
90                let gw = grapheme.width();
91                if current_width + gw > max_width && current_width > 0 {
92                    flush_line(&mut current_line, &mut result);
93                    current_width = 0;
94                }
95                current_line.push(Span::styled(grapheme.to_string(), default_style));
96                current_width += gw;
97            }
98        }
99
100        // Add URL as atomic unit
101        let url_width = url_text.width();
102        if current_width > 0 && current_width + url_width > max_width {
103            flush_line(&mut current_line, &mut result);
104            current_width = 0;
105        }
106        current_line.push(Span::styled(url_text.to_string(), default_style));
107        current_width += url_width;
108
109        text_pos = *url_end;
110    }
111
112    // Process remaining text after last URL
113    if text_pos < text.len() {
114        let remaining = &text[text_pos..];
115
116        for grapheme in UnicodeSegmentation::graphemes(remaining, true) {
117            let gw = grapheme.width();
118            if current_width + gw > max_width && current_width > 0 {
119                flush_line(&mut current_line, &mut result);
120                current_width = 0;
121            }
122            current_line.push(Span::styled(grapheme.to_string(), default_style));
123            current_width += gw;
124        }
125    }
126
127    flush_line(&mut current_line, &mut result);
128    if result.is_empty() {
129        result.push(Line::default());
130    }
131    result
132}
133
134/// Wrap multiple lines with URL preservation.
135pub fn wrap_lines_preserving_urls(
136    lines: Vec<Line<'static>>,
137    max_width: usize,
138) -> Vec<Line<'static>> {
139    if max_width == 0 {
140        return vec![Line::default()];
141    }
142    lines
143        .into_iter()
144        .flat_map(|line| wrap_line_preserving_urls(line, max_width))
145        .collect()
146}
147
148/// Calculate wrapped height using Paragraph::line_count.
149pub fn calculate_wrapped_height(text: &str, width: u16) -> usize {
150    if width == 0 {
151        return text.lines().count().max(1);
152    }
153    Paragraph::new(text).line_count(width)
154}
155
156#[cfg(test)]
157mod tests {
158    use super::*;
159
160    #[test]
161    fn test_url_detection() {
162        assert!(contains_preserved_token("https://example.com"));
163        assert!(contains_preserved_token("example.com/path"));
164        assert!(contains_preserved_token("localhost:8080"));
165        assert!(contains_preserved_token("192.168.1.1:8080"));
166        assert!(!contains_preserved_token("not a url"));
167    }
168
169    #[test]
170    fn test_file_path_detection() {
171        assert!(contains_preserved_token("src/main.rs"));
172        assert!(contains_preserved_token("./src/main.rs"));
173        assert!(contains_preserved_token("/tmp/example.txt"));
174        assert!(contains_preserved_token("\"./docs/My Notes.md\""));
175        assert!(contains_preserved_token(
176            "`/Users/example/Library/Application Support/Code/User/settings.json`"
177        ));
178    }
179
180    #[test]
181    fn test_url_only_preserved() {
182        let line = Line::from(Span::raw("https://example.com"));
183        let wrapped = wrap_line_preserving_urls(line, 80);
184        assert_eq!(wrapped.len(), 1);
185        assert!(
186            wrapped[0]
187                .spans
188                .iter()
189                .any(|s| s.content.contains("https://"))
190        );
191    }
192
193    #[test]
194    fn test_mixed_content() {
195        let line = Line::from(Span::raw("See https://example.com for info"));
196        let wrapped = wrap_line_preserving_urls(line, 25);
197        let all_text: String = wrapped
198            .iter()
199            .flat_map(|l| l.spans.iter().map(|s| s.content.as_ref()))
200            .collect();
201        assert!(all_text.contains("https://example.com"));
202        assert!(all_text.contains("See"));
203    }
204
205    #[test]
206    fn test_quoted_path_with_spaces_is_preserved() {
207        let line = Line::from(Span::raw("Open \"./docs/My Notes.md\" for details"));
208        let wrapped = wrap_line_preserving_urls(line, 18);
209        let all_text: String = wrapped
210            .iter()
211            .flat_map(|line| line.spans.iter().map(|span| span.content.as_ref()))
212            .collect();
213
214        assert!(all_text.contains("\"./docs/My Notes.md\""));
215    }
216
217    #[test]
218    fn test_no_url_delegates() {
219        let line = Line::from(Span::raw("Regular text without URLs"));
220        let wrapped = wrap_line_preserving_urls(line, 10);
221        assert!(!wrapped.is_empty());
222    }
223}
vtcode_tui/core_tui/session/wrapping.rs

vtcode_tui/core_tui/session/
wrapping.rs
