1use fuzzy::{StringMatch, StringMatchCandidate};
2use gpui::{relative, AppContext, BackgroundExecutor, HighlightStyle, StyledText, TextStyle};
3use settings::Settings;
4use std::ops::Range;
5use theme::{color_alpha, ActiveTheme, ThemeSettings};
6
7/// An outline of all the symbols contained in a buffer.
8#[derive(Debug)]
9pub struct Outline<T> {
10 pub items: Vec<OutlineItem<T>>,
11 candidates: Vec<StringMatchCandidate>,
12 pub path_candidates: Vec<StringMatchCandidate>,
13 path_candidate_prefixes: Vec<usize>,
14}
15
16#[derive(Clone, Debug, PartialEq, Eq, Hash)]
17pub struct OutlineItem<T> {
18 pub depth: usize,
19 pub range: Range<T>,
20 pub text: String,
21 pub highlight_ranges: Vec<(Range<usize>, HighlightStyle)>,
22 pub name_ranges: Vec<Range<usize>>,
23 pub body_range: Option<Range<T>>,
24}
25
26impl<T> Outline<T> {
27 pub fn new(items: Vec<OutlineItem<T>>) -> Self {
28 let mut candidates = Vec::new();
29 let mut path_candidates = Vec::new();
30 let mut path_candidate_prefixes = Vec::new();
31 let mut path_text = String::new();
32 let mut path_stack = Vec::new();
33
34 for (id, item) in items.iter().enumerate() {
35 if item.depth < path_stack.len() {
36 path_stack.truncate(item.depth);
37 path_text.truncate(path_stack.last().copied().unwrap_or(0));
38 }
39 if !path_text.is_empty() {
40 path_text.push(' ');
41 }
42 path_candidate_prefixes.push(path_text.len());
43 path_text.push_str(&item.text);
44 path_stack.push(path_text.len());
45
46 let candidate_text = item
47 .name_ranges
48 .iter()
49 .map(|range| &item.text[range.start..range.end])
50 .collect::<String>();
51
52 path_candidates.push(StringMatchCandidate::new(id, path_text.clone()));
53 candidates.push(StringMatchCandidate::new(id, candidate_text));
54 }
55
56 Self {
57 candidates,
58 path_candidates,
59 path_candidate_prefixes,
60 items,
61 }
62 }
63
64 pub async fn search(&self, query: &str, executor: BackgroundExecutor) -> Vec<StringMatch> {
65 let query = query.trim_start();
66 let is_path_query = query.contains(' ');
67 let smart_case = query.chars().any(|c| c.is_uppercase());
68 let mut matches = fuzzy::match_strings(
69 if is_path_query {
70 &self.path_candidates
71 } else {
72 &self.candidates
73 },
74 query,
75 smart_case,
76 100,
77 &Default::default(),
78 executor.clone(),
79 )
80 .await;
81 matches.sort_unstable_by_key(|m| m.candidate_id);
82
83 let mut tree_matches = Vec::new();
84
85 let mut prev_item_ix = 0;
86 for mut string_match in matches {
87 let outline_match = &self.items[string_match.candidate_id];
88 string_match.string.clone_from(&outline_match.text);
89
90 if is_path_query {
91 let prefix_len = self.path_candidate_prefixes[string_match.candidate_id];
92 string_match
93 .positions
94 .retain(|position| *position >= prefix_len);
95 for position in &mut string_match.positions {
96 *position -= prefix_len;
97 }
98 } else {
99 let mut name_ranges = outline_match.name_ranges.iter();
100 let mut name_range = name_ranges.next().unwrap();
101 let mut preceding_ranges_len = 0;
102 for position in &mut string_match.positions {
103 while *position >= preceding_ranges_len + name_range.len() {
104 preceding_ranges_len += name_range.len();
105 name_range = name_ranges.next().unwrap();
106 }
107 *position = name_range.start + (*position - preceding_ranges_len);
108 }
109 }
110
111 let insertion_ix = tree_matches.len();
112 let mut cur_depth = outline_match.depth;
113 for (ix, item) in self.items[prev_item_ix..string_match.candidate_id]
114 .iter()
115 .enumerate()
116 .rev()
117 {
118 if cur_depth == 0 {
119 break;
120 }
121
122 let candidate_index = ix + prev_item_ix;
123 if item.depth == cur_depth - 1 {
124 tree_matches.insert(
125 insertion_ix,
126 StringMatch {
127 candidate_id: candidate_index,
128 score: Default::default(),
129 positions: Default::default(),
130 string: Default::default(),
131 },
132 );
133 cur_depth -= 1;
134 }
135 }
136
137 prev_item_ix = string_match.candidate_id + 1;
138 tree_matches.push(string_match);
139 }
140
141 tree_matches
142 }
143}
144
145pub fn render_item<T>(
146 outline_item: &OutlineItem<T>,
147 match_ranges: impl IntoIterator<Item = Range<usize>>,
148 cx: &AppContext,
149) -> StyledText {
150 let mut highlight_style = HighlightStyle::default();
151 highlight_style.background_color = Some(color_alpha(cx.theme().colors().text_accent, 0.3));
152 let custom_highlights = match_ranges
153 .into_iter()
154 .map(|range| (range, highlight_style));
155
156 let settings = ThemeSettings::get_global(cx);
157
158 // TODO: We probably shouldn't need to build a whole new text style here
159 // but I'm not sure how to get the current one and modify it.
160 // Before this change TextStyle::default() was used here, which was giving us the wrong font and text color.
161 let text_style = TextStyle {
162 color: cx.theme().colors().text,
163 font_family: settings.buffer_font.family.clone(),
164 font_features: settings.buffer_font.features.clone(),
165 font_size: settings.buffer_font_size(cx).into(),
166 font_weight: settings.buffer_font.weight,
167 line_height: relative(1.),
168 ..Default::default()
169 };
170 let highlights = gpui::combine_highlights(
171 custom_highlights,
172 outline_item.highlight_ranges.iter().cloned(),
173 );
174
175 StyledText::new(outline_item.text.clone()).with_highlights(&text_style, highlights)
176}