1use std::any::Any;
2
3use gpui::{
4 AnyViewHandle, AnyWeakViewHandle, AppContext, Subscription, Task, ViewContext, ViewHandle,
5 WeakViewHandle,
6};
7use project::search::SearchQuery;
8
9use crate::{item::WeakItemHandle, Item, ItemHandle};
10
11#[derive(Debug)]
12pub enum SearchEvent {
13 MatchesInvalidated,
14 ActiveMatchChanged,
15}
16
17#[derive(Clone, Copy, PartialEq, Eq, Debug)]
18pub enum Direction {
19 Prev,
20 Next,
21}
22
23#[derive(Clone, Copy, Debug, Default)]
24pub struct SearchOptions {
25 pub case: bool,
26 pub word: bool,
27 pub regex: bool,
28}
29
30pub trait SearchableItem: Item {
31 type Match: Any + Sync + Send + Clone;
32
33 fn supported_options() -> SearchOptions {
34 SearchOptions {
35 case: true,
36 word: true,
37 regex: true,
38 }
39 }
40 fn to_search_event(event: &Self::Event) -> Option<SearchEvent>;
41 fn clear_matches(&mut self, cx: &mut ViewContext<Self>);
42 fn update_matches(&mut self, matches: Vec<Self::Match>, cx: &mut ViewContext<Self>);
43 fn query_suggestion(&mut self, cx: &mut ViewContext<Self>) -> String;
44 fn activate_match(
45 &mut self,
46 index: usize,
47 matches: Vec<Self::Match>,
48 cx: &mut ViewContext<Self>,
49 );
50 fn match_index_for_direction(
51 &mut self,
52 matches: &Vec<Self::Match>,
53 mut current_index: usize,
54 direction: Direction,
55 _: &mut ViewContext<Self>,
56 ) -> usize {
57 match direction {
58 Direction::Prev => {
59 if current_index == 0 {
60 matches.len() - 1
61 } else {
62 current_index - 1
63 }
64 }
65 Direction::Next => {
66 current_index += 1;
67 if current_index == matches.len() {
68 0
69 } else {
70 current_index
71 }
72 }
73 }
74 }
75 fn find_matches(
76 &mut self,
77 query: SearchQuery,
78 cx: &mut ViewContext<Self>,
79 ) -> Task<Vec<Self::Match>>;
80 fn active_match_index(
81 &mut self,
82 matches: Vec<Self::Match>,
83 cx: &mut ViewContext<Self>,
84 ) -> Option<usize>;
85}
86
87pub trait SearchableItemHandle: ItemHandle {
88 fn downgrade(&self) -> Box<dyn WeakSearchableItemHandle>;
89 fn boxed_clone(&self) -> Box<dyn SearchableItemHandle>;
90 fn supported_options(&self) -> SearchOptions;
91 fn subscribe_to_search_events(
92 &self,
93 cx: &mut AppContext,
94 handler: Box<dyn Fn(SearchEvent, &mut AppContext)>,
95 ) -> Subscription;
96 fn clear_matches(&self, cx: &mut AppContext);
97 fn update_matches(&self, matches: &Vec<Box<dyn Any + Send>>, cx: &mut AppContext);
98 fn query_suggestion(&self, cx: &mut AppContext) -> String;
99 fn activate_match(&self, index: usize, matches: &Vec<Box<dyn Any + Send>>, cx: &mut AppContext);
100 fn match_index_for_direction(
101 &self,
102 matches: &Vec<Box<dyn Any + Send>>,
103 current_index: usize,
104 direction: Direction,
105 cx: &mut AppContext,
106 ) -> usize;
107 fn find_matches(
108 &self,
109 query: SearchQuery,
110 cx: &mut AppContext,
111 ) -> Task<Vec<Box<dyn Any + Send>>>;
112 fn active_match_index(
113 &self,
114 matches: &Vec<Box<dyn Any + Send>>,
115 cx: &mut AppContext,
116 ) -> Option<usize>;
117}
118
119impl<T: SearchableItem> SearchableItemHandle for ViewHandle<T> {
120 fn downgrade(&self) -> Box<dyn WeakSearchableItemHandle> {
121 Box::new(self.downgrade())
122 }
123
124 fn boxed_clone(&self) -> Box<dyn SearchableItemHandle> {
125 Box::new(self.clone())
126 }
127
128 fn supported_options(&self) -> SearchOptions {
129 T::supported_options()
130 }
131
132 fn subscribe_to_search_events(
133 &self,
134 cx: &mut AppContext,
135 handler: Box<dyn Fn(SearchEvent, &mut AppContext)>,
136 ) -> Subscription {
137 cx.subscribe(self, move |_, event, cx| {
138 if let Some(search_event) = T::to_search_event(event) {
139 handler(search_event, cx)
140 }
141 })
142 }
143
144 fn clear_matches(&self, cx: &mut AppContext) {
145 self.update(cx, |this, cx| this.clear_matches(cx));
146 }
147 fn update_matches(&self, matches: &Vec<Box<dyn Any + Send>>, cx: &mut AppContext) {
148 let matches = downcast_matches(matches);
149 self.update(cx, |this, cx| this.update_matches(matches, cx));
150 }
151 fn query_suggestion(&self, cx: &mut AppContext) -> String {
152 self.update(cx, |this, cx| this.query_suggestion(cx))
153 }
154 fn activate_match(
155 &self,
156 index: usize,
157 matches: &Vec<Box<dyn Any + Send>>,
158 cx: &mut AppContext,
159 ) {
160 let matches = downcast_matches(matches);
161 self.update(cx, |this, cx| this.activate_match(index, matches, cx));
162 }
163 fn match_index_for_direction(
164 &self,
165 matches: &Vec<Box<dyn Any + Send>>,
166 current_index: usize,
167 direction: Direction,
168 cx: &mut AppContext,
169 ) -> usize {
170 let matches = downcast_matches(matches);
171 self.update(cx, |this, cx| {
172 this.match_index_for_direction(&matches, current_index, direction, cx)
173 })
174 }
175 fn find_matches(
176 &self,
177 query: SearchQuery,
178 cx: &mut AppContext,
179 ) -> Task<Vec<Box<dyn Any + Send>>> {
180 let matches = self.update(cx, |this, cx| this.find_matches(query, cx));
181 cx.foreground().spawn(async {
182 let matches = matches.await;
183 matches
184 .into_iter()
185 .map::<Box<dyn Any + Send>, _>(|range| Box::new(range))
186 .collect()
187 })
188 }
189 fn active_match_index(
190 &self,
191 matches: &Vec<Box<dyn Any + Send>>,
192 cx: &mut AppContext,
193 ) -> Option<usize> {
194 let matches = downcast_matches(matches);
195 self.update(cx, |this, cx| this.active_match_index(matches, cx))
196 }
197}
198
199fn downcast_matches<T: Any + Clone>(matches: &Vec<Box<dyn Any + Send>>) -> Vec<T> {
200 matches
201 .iter()
202 .map(|range| range.downcast_ref::<T>().cloned())
203 .collect::<Option<Vec<_>>>()
204 .expect(
205 "SearchableItemHandle function called with vec of matches of a different type than expected",
206 )
207}
208
209impl From<Box<dyn SearchableItemHandle>> for AnyViewHandle {
210 fn from(this: Box<dyn SearchableItemHandle>) -> Self {
211 this.as_any().clone()
212 }
213}
214
215impl From<&Box<dyn SearchableItemHandle>> for AnyViewHandle {
216 fn from(this: &Box<dyn SearchableItemHandle>) -> Self {
217 this.as_any().clone()
218 }
219}
220
221impl PartialEq for Box<dyn SearchableItemHandle> {
222 fn eq(&self, other: &Self) -> bool {
223 self.id() == other.id() && self.window_id() == other.window_id()
224 }
225}
226
227impl Eq for Box<dyn SearchableItemHandle> {}
228
229pub trait WeakSearchableItemHandle: WeakItemHandle {
230 fn upgrade(&self, cx: &AppContext) -> Option<Box<dyn SearchableItemHandle>>;
231
232 fn into_any(self) -> AnyWeakViewHandle;
233}
234
235impl<T: SearchableItem> WeakSearchableItemHandle for WeakViewHandle<T> {
236 fn upgrade(&self, cx: &AppContext) -> Option<Box<dyn SearchableItemHandle>> {
237 Some(Box::new(self.upgrade(cx)?))
238 }
239
240 fn into_any(self) -> AnyWeakViewHandle {
241 self.into_any()
242 }
243}
244
245impl PartialEq for Box<dyn WeakSearchableItemHandle> {
246 fn eq(&self, other: &Self) -> bool {
247 self.id() == other.id() && self.window_id() == other.window_id()
248 }
249}
250
251impl Eq for Box<dyn WeakSearchableItemHandle> {}
252
253impl std::hash::Hash for Box<dyn WeakSearchableItemHandle> {
254 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
255 (self.id(), self.window_id()).hash(state)
256 }
257}