1use crate::context_editor::ContextEditor;
2use anyhow::Result;
3pub use assistant_slash_command::SlashCommand;
4use assistant_slash_command::{AfterCompletion, SlashCommandLine, SlashCommandWorkingSet};
5use editor::{CompletionProvider, Editor};
6use fuzzy::{match_strings, StringMatchCandidate};
7use gpui::{App, AppContext as _, Context, Entity, Task, WeakEntity, Window};
8use language::{Anchor, Buffer, LanguageServerId, ToPoint};
9use parking_lot::Mutex;
10use project::{lsp_store::CompletionDocumentation, CompletionIntent};
11use rope::Point;
12use std::{
13 cell::RefCell,
14 ops::Range,
15 rc::Rc,
16 sync::{
17 atomic::{AtomicBool, Ordering::SeqCst},
18 Arc,
19 },
20};
21use workspace::Workspace;
22
23pub struct SlashCommandCompletionProvider {
24 cancel_flag: Mutex<Arc<AtomicBool>>,
25 slash_commands: Arc<SlashCommandWorkingSet>,
26 editor: Option<WeakEntity<ContextEditor>>,
27 workspace: Option<WeakEntity<Workspace>>,
28}
29
30impl SlashCommandCompletionProvider {
31 pub fn new(
32 slash_commands: Arc<SlashCommandWorkingSet>,
33 editor: Option<WeakEntity<ContextEditor>>,
34 workspace: Option<WeakEntity<Workspace>>,
35 ) -> Self {
36 Self {
37 cancel_flag: Mutex::new(Arc::new(AtomicBool::new(false))),
38 slash_commands,
39 editor,
40 workspace,
41 }
42 }
43
44 fn complete_command_name(
45 &self,
46 command_name: &str,
47 command_range: Range<Anchor>,
48 name_range: Range<Anchor>,
49 window: &mut Window,
50 cx: &mut App,
51 ) -> Task<Result<Vec<project::Completion>>> {
52 let slash_commands = self.slash_commands.clone();
53 let candidates = slash_commands
54 .command_names(cx)
55 .into_iter()
56 .enumerate()
57 .map(|(ix, def)| StringMatchCandidate::new(ix, &def))
58 .collect::<Vec<_>>();
59 let command_name = command_name.to_string();
60 let editor = self.editor.clone();
61 let workspace = self.workspace.clone();
62 window.spawn(cx, |mut cx| async move {
63 let matches = match_strings(
64 &candidates,
65 &command_name,
66 true,
67 usize::MAX,
68 &Default::default(),
69 cx.background_executor().clone(),
70 )
71 .await;
72
73 cx.update(|_, cx| {
74 matches
75 .into_iter()
76 .filter_map(|mat| {
77 let command = slash_commands.command(&mat.string, cx)?;
78 let mut new_text = mat.string.clone();
79 let requires_argument = command.requires_argument();
80 let accepts_arguments = command.accepts_arguments();
81 if requires_argument || accepts_arguments {
82 new_text.push(' ');
83 }
84
85 let confirm =
86 editor
87 .clone()
88 .zip(workspace.clone())
89 .map(|(editor, workspace)| {
90 let command_name = mat.string.clone();
91 let command_range = command_range.clone();
92 let editor = editor.clone();
93 let workspace = workspace.clone();
94 Arc::new(
95 move |intent: CompletionIntent,
96 window: &mut Window,
97 cx: &mut App| {
98 if !requires_argument
99 && (!accepts_arguments || intent.is_complete())
100 {
101 editor
102 .update(cx, |editor, cx| {
103 editor.run_command(
104 command_range.clone(),
105 &command_name,
106 &[],
107 true,
108 workspace.clone(),
109 window,
110 cx,
111 );
112 })
113 .ok();
114 false
115 } else {
116 requires_argument || accepts_arguments
117 }
118 },
119 ) as Arc<_>
120 });
121 Some(project::Completion {
122 old_range: name_range.clone(),
123 documentation: Some(CompletionDocumentation::SingleLine(
124 command.description().into(),
125 )),
126 new_text,
127 label: command.label(cx),
128 server_id: LanguageServerId(0),
129 lsp_completion: Default::default(),
130 confirm,
131 resolved: true,
132 })
133 })
134 .collect()
135 })
136 })
137 }
138
139 #[allow(clippy::too_many_arguments)]
140 fn complete_command_argument(
141 &self,
142 command_name: &str,
143 arguments: &[String],
144 command_range: Range<Anchor>,
145 argument_range: Range<Anchor>,
146 last_argument_range: Range<Anchor>,
147 window: &mut Window,
148 cx: &mut App,
149 ) -> Task<Result<Vec<project::Completion>>> {
150 let new_cancel_flag = Arc::new(AtomicBool::new(false));
151 let mut flag = self.cancel_flag.lock();
152 flag.store(true, SeqCst);
153 *flag = new_cancel_flag.clone();
154 if let Some(command) = self.slash_commands.command(command_name, cx) {
155 let completions = command.complete_argument(
156 arguments,
157 new_cancel_flag.clone(),
158 self.workspace.clone(),
159 window,
160 cx,
161 );
162 let command_name: Arc<str> = command_name.into();
163 let editor = self.editor.clone();
164 let workspace = self.workspace.clone();
165 let arguments = arguments.to_vec();
166 cx.background_spawn(async move {
167 Ok(completions
168 .await?
169 .into_iter()
170 .map(|new_argument| {
171 let confirm =
172 editor
173 .clone()
174 .zip(workspace.clone())
175 .map(|(editor, workspace)| {
176 Arc::new({
177 let mut completed_arguments = arguments.clone();
178 if new_argument.replace_previous_arguments {
179 completed_arguments.clear();
180 } else {
181 completed_arguments.pop();
182 }
183 completed_arguments.push(new_argument.new_text.clone());
184
185 let command_range = command_range.clone();
186 let command_name = command_name.clone();
187 move |intent: CompletionIntent,
188 window: &mut Window,
189 cx: &mut App| {
190 if new_argument.after_completion.run()
191 || intent.is_complete()
192 {
193 editor
194 .update(cx, |editor, cx| {
195 editor.run_command(
196 command_range.clone(),
197 &command_name,
198 &completed_arguments,
199 true,
200 workspace.clone(),
201 window,
202 cx,
203 );
204 })
205 .ok();
206 false
207 } else {
208 !new_argument.after_completion.run()
209 }
210 }
211 }) as Arc<_>
212 });
213
214 let mut new_text = new_argument.new_text.clone();
215 if new_argument.after_completion == AfterCompletion::Continue {
216 new_text.push(' ');
217 }
218
219 project::Completion {
220 old_range: if new_argument.replace_previous_arguments {
221 argument_range.clone()
222 } else {
223 last_argument_range.clone()
224 },
225 label: new_argument.label,
226 new_text,
227 documentation: None,
228 server_id: LanguageServerId(0),
229 lsp_completion: Default::default(),
230 confirm,
231 resolved: true,
232 }
233 })
234 .collect())
235 })
236 } else {
237 Task::ready(Ok(Vec::new()))
238 }
239 }
240}
241
242impl CompletionProvider for SlashCommandCompletionProvider {
243 fn completions(
244 &self,
245 buffer: &Entity<Buffer>,
246 buffer_position: Anchor,
247 _: editor::CompletionContext,
248 window: &mut Window,
249 cx: &mut Context<Editor>,
250 ) -> Task<Result<Vec<project::Completion>>> {
251 let Some((name, arguments, command_range, last_argument_range)) =
252 buffer.update(cx, |buffer, _cx| {
253 let position = buffer_position.to_point(buffer);
254 let line_start = Point::new(position.row, 0);
255 let mut lines = buffer.text_for_range(line_start..position).lines();
256 let line = lines.next()?;
257 let call = SlashCommandLine::parse(line)?;
258
259 let command_range_start = Point::new(position.row, call.name.start as u32 - 1);
260 let command_range_end = Point::new(
261 position.row,
262 call.arguments.last().map_or(call.name.end, |arg| arg.end) as u32,
263 );
264 let command_range = buffer.anchor_after(command_range_start)
265 ..buffer.anchor_after(command_range_end);
266
267 let name = line[call.name.clone()].to_string();
268 let (arguments, last_argument_range) = if let Some(argument) = call.arguments.last()
269 {
270 let last_arg_start =
271 buffer.anchor_after(Point::new(position.row, argument.start as u32));
272 let first_arg_start = call.arguments.first().expect("we have the last element");
273 let first_arg_start =
274 buffer.anchor_after(Point::new(position.row, first_arg_start.start as u32));
275 let arguments = call
276 .arguments
277 .iter()
278 .filter_map(|argument| Some(line.get(argument.clone())?.to_string()))
279 .collect::<Vec<_>>();
280 let argument_range = first_arg_start..buffer_position;
281 (
282 Some((arguments, argument_range)),
283 last_arg_start..buffer_position,
284 )
285 } else {
286 let start =
287 buffer.anchor_after(Point::new(position.row, call.name.start as u32));
288 (None, start..buffer_position)
289 };
290
291 Some((name, arguments, command_range, last_argument_range))
292 })
293 else {
294 return Task::ready(Ok(Vec::new()));
295 };
296
297 if let Some((arguments, argument_range)) = arguments {
298 self.complete_command_argument(
299 &name,
300 &arguments,
301 command_range,
302 argument_range,
303 last_argument_range,
304 window,
305 cx,
306 )
307 } else {
308 self.complete_command_name(&name, command_range, last_argument_range, window, cx)
309 }
310 }
311
312 fn resolve_completions(
313 &self,
314 _: Entity<Buffer>,
315 _: Vec<usize>,
316 _: Rc<RefCell<Box<[project::Completion]>>>,
317 _: &mut Context<Editor>,
318 ) -> Task<Result<bool>> {
319 Task::ready(Ok(true))
320 }
321
322 fn is_completion_trigger(
323 &self,
324 buffer: &Entity<Buffer>,
325 position: language::Anchor,
326 _text: &str,
327 _trigger_in_words: bool,
328 cx: &mut Context<Editor>,
329 ) -> bool {
330 let buffer = buffer.read(cx);
331 let position = position.to_point(buffer);
332 let line_start = Point::new(position.row, 0);
333 let mut lines = buffer.text_for_range(line_start..position).lines();
334 if let Some(line) = lines.next() {
335 SlashCommandLine::parse(line).is_some()
336 } else {
337 false
338 }
339 }
340
341 fn sort_completions(&self) -> bool {
342 false
343 }
344}