1use fuzzy::{StringMatch, StringMatchCandidate};
2use gpui::{
3 relative, AppContext, BackgroundExecutor, FontStyle, HighlightStyle, StyledText, TextStyle,
4 WhiteSpace,
5};
6use settings::Settings;
7use std::ops::Range;
8use theme::{color_alpha, ActiveTheme, ThemeSettings};
9
10/// An outline of all the symbols contained in a buffer.
11#[derive(Debug)]
12pub struct Outline<T> {
13 pub items: Vec<OutlineItem<T>>,
14 candidates: Vec<StringMatchCandidate>,
15 path_candidates: Vec<StringMatchCandidate>,
16 path_candidate_prefixes: Vec<usize>,
17}
18
19#[derive(Clone, Debug, PartialEq, Eq, Hash)]
20pub struct OutlineItem<T> {
21 pub depth: usize,
22 pub range: Range<T>,
23 pub text: String,
24 pub highlight_ranges: Vec<(Range<usize>, HighlightStyle)>,
25 pub name_ranges: Vec<Range<usize>>,
26}
27
28impl<T> Outline<T> {
29 pub fn new(items: Vec<OutlineItem<T>>) -> Self {
30 let mut candidates = Vec::new();
31 let mut path_candidates = Vec::new();
32 let mut path_candidate_prefixes = Vec::new();
33 let mut path_text = String::new();
34 let mut path_stack = Vec::new();
35
36 for (id, item) in items.iter().enumerate() {
37 if item.depth < path_stack.len() {
38 path_stack.truncate(item.depth);
39 path_text.truncate(path_stack.last().copied().unwrap_or(0));
40 }
41 if !path_text.is_empty() {
42 path_text.push(' ');
43 }
44 path_candidate_prefixes.push(path_text.len());
45 path_text.push_str(&item.text);
46 path_stack.push(path_text.len());
47
48 let candidate_text = item
49 .name_ranges
50 .iter()
51 .map(|range| &item.text[range.start..range.end])
52 .collect::<String>();
53
54 path_candidates.push(StringMatchCandidate::new(id, path_text.clone()));
55 candidates.push(StringMatchCandidate::new(id, candidate_text));
56 }
57
58 Self {
59 candidates,
60 path_candidates,
61 path_candidate_prefixes,
62 items,
63 }
64 }
65
66 pub async fn search(&self, query: &str, executor: BackgroundExecutor) -> Vec<StringMatch> {
67 let query = query.trim_start();
68 let is_path_query = query.contains(' ');
69 let smart_case = query.chars().any(|c| c.is_uppercase());
70 let mut matches = fuzzy::match_strings(
71 if is_path_query {
72 &self.path_candidates
73 } else {
74 &self.candidates
75 },
76 query,
77 smart_case,
78 100,
79 &Default::default(),
80 executor.clone(),
81 )
82 .await;
83 matches.sort_unstable_by_key(|m| m.candidate_id);
84
85 let mut tree_matches = Vec::new();
86
87 let mut prev_item_ix = 0;
88 for mut string_match in matches {
89 let outline_match = &self.items[string_match.candidate_id];
90 string_match.string.clone_from(&outline_match.text);
91
92 if is_path_query {
93 let prefix_len = self.path_candidate_prefixes[string_match.candidate_id];
94 string_match
95 .positions
96 .retain(|position| *position >= prefix_len);
97 for position in &mut string_match.positions {
98 *position -= prefix_len;
99 }
100 } else {
101 let mut name_ranges = outline_match.name_ranges.iter();
102 let mut name_range = name_ranges.next().unwrap();
103 let mut preceding_ranges_len = 0;
104 for position in &mut string_match.positions {
105 while *position >= preceding_ranges_len + name_range.len() {
106 preceding_ranges_len += name_range.len();
107 name_range = name_ranges.next().unwrap();
108 }
109 *position = name_range.start + (*position - preceding_ranges_len);
110 }
111 }
112
113 let insertion_ix = tree_matches.len();
114 let mut cur_depth = outline_match.depth;
115 for (ix, item) in self.items[prev_item_ix..string_match.candidate_id]
116 .iter()
117 .enumerate()
118 .rev()
119 {
120 if cur_depth == 0 {
121 break;
122 }
123
124 let candidate_index = ix + prev_item_ix;
125 if item.depth == cur_depth - 1 {
126 tree_matches.insert(
127 insertion_ix,
128 StringMatch {
129 candidate_id: candidate_index,
130 score: Default::default(),
131 positions: Default::default(),
132 string: Default::default(),
133 },
134 );
135 cur_depth -= 1;
136 }
137 }
138
139 prev_item_ix = string_match.candidate_id + 1;
140 tree_matches.push(string_match);
141 }
142
143 tree_matches
144 }
145}
146
147pub fn render_item<T>(
148 outline_item: &OutlineItem<T>,
149 match_ranges: impl IntoIterator<Item = Range<usize>>,
150 cx: &AppContext,
151) -> StyledText {
152 let mut highlight_style = HighlightStyle::default();
153 highlight_style.background_color = Some(color_alpha(cx.theme().colors().text_accent, 0.3));
154 let custom_highlights = match_ranges
155 .into_iter()
156 .map(|range| (range, highlight_style));
157
158 let settings = ThemeSettings::get_global(cx);
159
160 // TODO: We probably shouldn't need to build a whole new text style here
161 // but I'm not sure how to get the current one and modify it.
162 // Before this change TextStyle::default() was used here, which was giving us the wrong font and text color.
163 let text_style = TextStyle {
164 color: cx.theme().colors().text,
165 font_family: settings.buffer_font.family.clone(),
166 font_features: settings.buffer_font.features.clone(),
167 font_size: settings.buffer_font_size(cx).into(),
168 font_weight: settings.buffer_font.weight,
169 font_style: FontStyle::Normal,
170 line_height: relative(1.),
171 background_color: None,
172 underline: None,
173 strikethrough: None,
174 white_space: WhiteSpace::Normal,
175 };
176 let highlights = gpui::combine_highlights(
177 custom_highlights,
178 outline_item.highlight_ranges.iter().cloned(),
179 );
180
181 StyledText::new(outline_item.text.clone()).with_highlights(&text_style, highlights)
182}