1use crate::assistant_panel::ContextEditor;
2use anyhow::Result;
3pub use assistant_slash_command::{SlashCommand, SlashCommandOutput, SlashCommandRegistry};
4use editor::{CompletionProvider, Editor};
5use fuzzy::{match_strings, StringMatchCandidate};
6use gpui::{AppContext, Model, Task, ViewContext, WeakView, WindowContext};
7use language::{Anchor, Buffer, CodeLabel, Documentation, HighlightId, LanguageServerId, ToPoint};
8use parking_lot::{Mutex, RwLock};
9use rope::Point;
10use std::{
11 ops::Range,
12 sync::{
13 atomic::{AtomicBool, Ordering::SeqCst},
14 Arc,
15 },
16};
17use ui::ActiveTheme;
18use workspace::Workspace;
19
20pub mod active_command;
21pub mod default_command;
22pub mod diagnostics_command;
23pub mod docs_command;
24pub mod fetch_command;
25pub mod file_command;
26pub mod now_command;
27pub mod project_command;
28pub mod prompt_command;
29pub mod search_command;
30pub mod symbols_command;
31pub mod tabs_command;
32pub mod term_command;
33pub mod workflow_command;
34
35pub(crate) struct SlashCommandCompletionProvider {
36 cancel_flag: Mutex<Arc<AtomicBool>>,
37 editor: Option<WeakView<ContextEditor>>,
38 workspace: Option<WeakView<Workspace>>,
39}
40
41pub(crate) struct SlashCommandLine {
42 /// The range within the line containing the command name.
43 pub name: Range<usize>,
44 /// The range within the line containing the command argument.
45 pub argument: Option<Range<usize>>,
46}
47
48impl SlashCommandCompletionProvider {
49 pub fn new(
50 editor: Option<WeakView<ContextEditor>>,
51 workspace: Option<WeakView<Workspace>>,
52 ) -> Self {
53 Self {
54 cancel_flag: Mutex::new(Arc::new(AtomicBool::new(false))),
55 editor,
56 workspace,
57 }
58 }
59
60 fn complete_command_name(
61 &self,
62 command_name: &str,
63 command_range: Range<Anchor>,
64 name_range: Range<Anchor>,
65 cx: &mut WindowContext,
66 ) -> Task<Result<Vec<project::Completion>>> {
67 let commands = SlashCommandRegistry::global(cx);
68 let candidates = commands
69 .command_names()
70 .into_iter()
71 .enumerate()
72 .map(|(ix, def)| StringMatchCandidate {
73 id: ix,
74 string: def.to_string(),
75 char_bag: def.as_ref().into(),
76 })
77 .collect::<Vec<_>>();
78 let command_name = command_name.to_string();
79 let editor = self.editor.clone();
80 let workspace = self.workspace.clone();
81 cx.spawn(|mut cx| async move {
82 let matches = match_strings(
83 &candidates,
84 &command_name,
85 true,
86 usize::MAX,
87 &Default::default(),
88 cx.background_executor().clone(),
89 )
90 .await;
91
92 cx.update(|cx| {
93 matches
94 .into_iter()
95 .filter_map(|mat| {
96 let command = commands.command(&mat.string)?;
97 let mut new_text = mat.string.clone();
98 let requires_argument = command.requires_argument();
99 if requires_argument {
100 new_text.push(' ');
101 }
102
103 let confirm = editor.clone().zip(workspace.clone()).and_then(
104 |(editor, workspace)| {
105 (!requires_argument).then(|| {
106 let command_name = mat.string.clone();
107 let command_range = command_range.clone();
108 let editor = editor.clone();
109 let workspace = workspace.clone();
110 Arc::new(move |cx: &mut WindowContext| {
111 editor
112 .update(cx, |editor, cx| {
113 editor.run_command(
114 command_range.clone(),
115 &command_name,
116 None,
117 true,
118 workspace.clone(),
119 cx,
120 );
121 })
122 .ok();
123 }) as Arc<_>
124 })
125 },
126 );
127 Some(project::Completion {
128 old_range: name_range.clone(),
129 documentation: Some(Documentation::SingleLine(command.description())),
130 new_text,
131 label: command.label(cx),
132 server_id: LanguageServerId(0),
133 lsp_completion: Default::default(),
134 show_new_completions_on_confirm: requires_argument,
135 confirm,
136 })
137 })
138 .collect()
139 })
140 })
141 }
142
143 fn complete_command_argument(
144 &self,
145 command_name: &str,
146 argument: String,
147 command_range: Range<Anchor>,
148 argument_range: Range<Anchor>,
149 cx: &mut WindowContext,
150 ) -> Task<Result<Vec<project::Completion>>> {
151 let new_cancel_flag = Arc::new(AtomicBool::new(false));
152 let mut flag = self.cancel_flag.lock();
153 flag.store(true, SeqCst);
154 *flag = new_cancel_flag.clone();
155
156 let commands = SlashCommandRegistry::global(cx);
157 if let Some(command) = commands.command(command_name) {
158 let completions = command.complete_argument(
159 argument,
160 new_cancel_flag.clone(),
161 self.workspace.clone(),
162 cx,
163 );
164 let command_name: Arc<str> = command_name.into();
165 let editor = self.editor.clone();
166 let workspace = self.workspace.clone();
167 cx.background_executor().spawn(async move {
168 Ok(completions
169 .await?
170 .into_iter()
171 .map(|command_argument| {
172 let confirm = if command_argument.run_command {
173 editor
174 .clone()
175 .zip(workspace.clone())
176 .map(|(editor, workspace)| {
177 Arc::new({
178 let command_range = command_range.clone();
179 let command_name = command_name.clone();
180 let command_argument = command_argument.new_text.clone();
181 move |cx: &mut WindowContext| {
182 editor
183 .update(cx, |editor, cx| {
184 editor.run_command(
185 command_range.clone(),
186 &command_name,
187 Some(&command_argument),
188 true,
189 workspace.clone(),
190 cx,
191 );
192 })
193 .ok();
194 }
195 }) as Arc<_>
196 })
197 } else {
198 None
199 };
200
201 let mut new_text = command_argument.new_text.clone();
202 if !command_argument.run_command {
203 new_text.push(' ');
204 }
205
206 project::Completion {
207 old_range: argument_range.clone(),
208 label: CodeLabel::plain(command_argument.label, None),
209 new_text,
210 documentation: None,
211 server_id: LanguageServerId(0),
212 lsp_completion: Default::default(),
213 show_new_completions_on_confirm: !command_argument.run_command,
214 confirm,
215 }
216 })
217 .collect())
218 })
219 } else {
220 cx.background_executor()
221 .spawn(async move { Ok(Vec::new()) })
222 }
223 }
224}
225
226impl CompletionProvider for SlashCommandCompletionProvider {
227 fn completions(
228 &self,
229 buffer: &Model<Buffer>,
230 buffer_position: Anchor,
231 _: editor::CompletionContext,
232 cx: &mut ViewContext<Editor>,
233 ) -> Task<Result<Vec<project::Completion>>> {
234 let Some((name, argument, command_range, argument_range)) =
235 buffer.update(cx, |buffer, _cx| {
236 let position = buffer_position.to_point(buffer);
237 let line_start = Point::new(position.row, 0);
238 let mut lines = buffer.text_for_range(line_start..position).lines();
239 let line = lines.next()?;
240 let call = SlashCommandLine::parse(line)?;
241
242 let command_range_start = Point::new(position.row, call.name.start as u32 - 1);
243 let command_range_end = Point::new(
244 position.row,
245 call.argument.as_ref().map_or(call.name.end, |arg| arg.end) as u32,
246 );
247 let command_range = buffer.anchor_after(command_range_start)
248 ..buffer.anchor_after(command_range_end);
249
250 let name = line[call.name.clone()].to_string();
251
252 Some(if let Some(argument) = call.argument {
253 let start =
254 buffer.anchor_after(Point::new(position.row, argument.start as u32));
255 let argument = line[argument.clone()].to_string();
256 (name, Some(argument), command_range, start..buffer_position)
257 } else {
258 let start =
259 buffer.anchor_after(Point::new(position.row, call.name.start as u32));
260 (name, None, command_range, start..buffer_position)
261 })
262 })
263 else {
264 return Task::ready(Ok(Vec::new()));
265 };
266
267 if let Some(argument) = argument {
268 self.complete_command_argument(&name, argument, command_range, argument_range, cx)
269 } else {
270 self.complete_command_name(&name, command_range, argument_range, cx)
271 }
272 }
273
274 fn resolve_completions(
275 &self,
276 _: Model<Buffer>,
277 _: Vec<usize>,
278 _: Arc<RwLock<Box<[project::Completion]>>>,
279 _: &mut ViewContext<Editor>,
280 ) -> Task<Result<bool>> {
281 Task::ready(Ok(true))
282 }
283
284 fn apply_additional_edits_for_completion(
285 &self,
286 _: Model<Buffer>,
287 _: project::Completion,
288 _: bool,
289 _: &mut ViewContext<Editor>,
290 ) -> Task<Result<Option<language::Transaction>>> {
291 Task::ready(Ok(None))
292 }
293
294 fn is_completion_trigger(
295 &self,
296 buffer: &Model<Buffer>,
297 position: language::Anchor,
298 _text: &str,
299 _trigger_in_words: bool,
300 cx: &mut ViewContext<Editor>,
301 ) -> bool {
302 let buffer = buffer.read(cx);
303 let position = position.to_point(buffer);
304 let line_start = Point::new(position.row, 0);
305 let mut lines = buffer.text_for_range(line_start..position).lines();
306 if let Some(line) = lines.next() {
307 SlashCommandLine::parse(line).is_some()
308 } else {
309 false
310 }
311 }
312}
313
314impl SlashCommandLine {
315 pub(crate) fn parse(line: &str) -> Option<Self> {
316 let mut call: Option<Self> = None;
317 let mut ix = 0;
318 for c in line.chars() {
319 let next_ix = ix + c.len_utf8();
320 if let Some(call) = &mut call {
321 // The command arguments start at the first non-whitespace character
322 // after the command name, and continue until the end of the line.
323 if let Some(argument) = &mut call.argument {
324 if (*argument).is_empty() && c.is_whitespace() {
325 argument.start = next_ix;
326 }
327 argument.end = next_ix;
328 }
329 // The command name ends at the first whitespace character.
330 else if !call.name.is_empty() {
331 if c.is_whitespace() {
332 call.argument = Some(next_ix..next_ix);
333 } else {
334 call.name.end = next_ix;
335 }
336 }
337 // The command name must begin with a letter.
338 else if c.is_alphabetic() {
339 call.name.end = next_ix;
340 } else {
341 return None;
342 }
343 }
344 // Commands start with a slash.
345 else if c == '/' {
346 call = Some(SlashCommandLine {
347 name: next_ix..next_ix,
348 argument: None,
349 });
350 }
351 // The line can't contain anything before the slash except for whitespace.
352 else if !c.is_whitespace() {
353 return None;
354 }
355 ix = next_ix;
356 }
357 call
358 }
359}
360
361pub fn create_label_for_command(
362 command_name: &str,
363 arguments: &[&str],
364 cx: &AppContext,
365) -> CodeLabel {
366 let mut label = CodeLabel::default();
367 label.push_str(command_name, None);
368 label.push_str(" ", None);
369 label.push_str(
370 &arguments.join(" "),
371 cx.theme().syntax().highlight_id("comment").map(HighlightId),
372 );
373 label.filter_range = 0..command_name.len();
374 label
375}