1use crate::{context::LoadedContext, inline_prompt_editor::CodegenStatus};
2use agent_settings::AgentSettings;
3use anyhow::{Context as _, Result};
4use client::telemetry::Telemetry;
5use cloud_llm_client::CompletionIntent;
6use collections::HashSet;
7use editor::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint};
8use futures::{
9 SinkExt, Stream, StreamExt, TryStreamExt as _,
10 channel::mpsc,
11 future::{LocalBoxFuture, Shared},
12 join,
13};
14use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Subscription, Task};
15use language::{Buffer, IndentKind, Point, TransactionId, line_diff};
16use language_model::{
17 LanguageModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
18 LanguageModelTextStream, Role, report_assistant_event,
19};
20use multi_buffer::MultiBufferRow;
21use parking_lot::Mutex;
22use prompt_store::PromptBuilder;
23use rope::Rope;
24use smol::future::FutureExt;
25use std::{
26 cmp,
27 future::Future,
28 iter,
29 ops::{Range, RangeInclusive},
30 pin::Pin,
31 sync::Arc,
32 task::{self, Poll},
33 time::Instant,
34};
35use streaming_diff::{CharOperation, LineDiff, LineOperation, StreamingDiff};
36use telemetry_events::{AssistantEventData, AssistantKind, AssistantPhase};
37
38pub struct BufferCodegen {
39 alternatives: Vec<Entity<CodegenAlternative>>,
40 pub active_alternative: usize,
41 seen_alternatives: HashSet<usize>,
42 subscriptions: Vec<Subscription>,
43 buffer: Entity<MultiBuffer>,
44 range: Range<Anchor>,
45 initial_transaction_id: Option<TransactionId>,
46 telemetry: Arc<Telemetry>,
47 builder: Arc<PromptBuilder>,
48 pub is_insertion: bool,
49}
50
51impl BufferCodegen {
52 pub fn new(
53 buffer: Entity<MultiBuffer>,
54 range: Range<Anchor>,
55 initial_transaction_id: Option<TransactionId>,
56 telemetry: Arc<Telemetry>,
57 builder: Arc<PromptBuilder>,
58 cx: &mut Context<Self>,
59 ) -> Self {
60 let codegen = cx.new(|cx| {
61 CodegenAlternative::new(
62 buffer.clone(),
63 range.clone(),
64 false,
65 Some(telemetry.clone()),
66 builder.clone(),
67 cx,
68 )
69 });
70 let mut this = Self {
71 is_insertion: range.to_offset(&buffer.read(cx).snapshot(cx)).is_empty(),
72 alternatives: vec![codegen],
73 active_alternative: 0,
74 seen_alternatives: HashSet::default(),
75 subscriptions: Vec::new(),
76 buffer,
77 range,
78 initial_transaction_id,
79 telemetry,
80 builder,
81 };
82 this.activate(0, cx);
83 this
84 }
85
86 fn subscribe_to_alternative(&mut self, cx: &mut Context<Self>) {
87 let codegen = self.active_alternative().clone();
88 self.subscriptions.clear();
89 self.subscriptions
90 .push(cx.observe(&codegen, |_, _, cx| cx.notify()));
91 self.subscriptions
92 .push(cx.subscribe(&codegen, |_, _, event, cx| cx.emit(*event)));
93 }
94
95 pub fn active_alternative(&self) -> &Entity<CodegenAlternative> {
96 &self.alternatives[self.active_alternative]
97 }
98
99 pub fn status<'a>(&self, cx: &'a App) -> &'a CodegenStatus {
100 &self.active_alternative().read(cx).status
101 }
102
103 pub fn alternative_count(&self, cx: &App) -> usize {
104 LanguageModelRegistry::read_global(cx)
105 .inline_alternative_models()
106 .len()
107 + 1
108 }
109
110 pub fn cycle_prev(&mut self, cx: &mut Context<Self>) {
111 let next_active_ix = if self.active_alternative == 0 {
112 self.alternatives.len() - 1
113 } else {
114 self.active_alternative - 1
115 };
116 self.activate(next_active_ix, cx);
117 }
118
119 pub fn cycle_next(&mut self, cx: &mut Context<Self>) {
120 let next_active_ix = (self.active_alternative + 1) % self.alternatives.len();
121 self.activate(next_active_ix, cx);
122 }
123
124 fn activate(&mut self, index: usize, cx: &mut Context<Self>) {
125 self.active_alternative()
126 .update(cx, |codegen, cx| codegen.set_active(false, cx));
127 self.seen_alternatives.insert(index);
128 self.active_alternative = index;
129 self.active_alternative()
130 .update(cx, |codegen, cx| codegen.set_active(true, cx));
131 self.subscribe_to_alternative(cx);
132 cx.notify();
133 }
134
135 pub fn start(
136 &mut self,
137 primary_model: Arc<dyn LanguageModel>,
138 user_prompt: String,
139 context_task: Shared<Task<Option<LoadedContext>>>,
140 cx: &mut Context<Self>,
141 ) -> Result<()> {
142 let alternative_models = LanguageModelRegistry::read_global(cx)
143 .inline_alternative_models()
144 .to_vec();
145
146 self.active_alternative()
147 .update(cx, |alternative, cx| alternative.undo(cx));
148 self.activate(0, cx);
149 self.alternatives.truncate(1);
150
151 for _ in 0..alternative_models.len() {
152 self.alternatives.push(cx.new(|cx| {
153 CodegenAlternative::new(
154 self.buffer.clone(),
155 self.range.clone(),
156 false,
157 Some(self.telemetry.clone()),
158 self.builder.clone(),
159 cx,
160 )
161 }));
162 }
163
164 for (model, alternative) in iter::once(primary_model)
165 .chain(alternative_models)
166 .zip(&self.alternatives)
167 {
168 alternative.update(cx, |alternative, cx| {
169 alternative.start(user_prompt.clone(), context_task.clone(), model.clone(), cx)
170 })?;
171 }
172
173 Ok(())
174 }
175
176 pub fn stop(&mut self, cx: &mut Context<Self>) {
177 for codegen in &self.alternatives {
178 codegen.update(cx, |codegen, cx| codegen.stop(cx));
179 }
180 }
181
182 pub fn undo(&mut self, cx: &mut Context<Self>) {
183 self.active_alternative()
184 .update(cx, |codegen, cx| codegen.undo(cx));
185
186 self.buffer.update(cx, |buffer, cx| {
187 if let Some(transaction_id) = self.initial_transaction_id.take() {
188 buffer.undo_transaction(transaction_id, cx);
189 buffer.refresh_preview(cx);
190 }
191 });
192 }
193
194 pub fn buffer(&self, cx: &App) -> Entity<MultiBuffer> {
195 self.active_alternative().read(cx).buffer.clone()
196 }
197
198 pub fn old_buffer(&self, cx: &App) -> Entity<Buffer> {
199 self.active_alternative().read(cx).old_buffer.clone()
200 }
201
202 pub fn snapshot(&self, cx: &App) -> MultiBufferSnapshot {
203 self.active_alternative().read(cx).snapshot.clone()
204 }
205
206 pub fn edit_position(&self, cx: &App) -> Option<Anchor> {
207 self.active_alternative().read(cx).edit_position
208 }
209
210 pub fn diff<'a>(&self, cx: &'a App) -> &'a Diff {
211 &self.active_alternative().read(cx).diff
212 }
213
214 pub fn last_equal_ranges<'a>(&self, cx: &'a App) -> &'a [Range<Anchor>] {
215 self.active_alternative().read(cx).last_equal_ranges()
216 }
217}
218
219impl EventEmitter<CodegenEvent> for BufferCodegen {}
220
221pub struct CodegenAlternative {
222 buffer: Entity<MultiBuffer>,
223 old_buffer: Entity<Buffer>,
224 snapshot: MultiBufferSnapshot,
225 edit_position: Option<Anchor>,
226 range: Range<Anchor>,
227 last_equal_ranges: Vec<Range<Anchor>>,
228 transformation_transaction_id: Option<TransactionId>,
229 status: CodegenStatus,
230 generation: Task<()>,
231 diff: Diff,
232 telemetry: Option<Arc<Telemetry>>,
233 _subscription: gpui::Subscription,
234 builder: Arc<PromptBuilder>,
235 active: bool,
236 edits: Vec<(Range<Anchor>, String)>,
237 line_operations: Vec<LineOperation>,
238 elapsed_time: Option<f64>,
239 completion: Option<String>,
240 pub message_id: Option<String>,
241}
242
243impl EventEmitter<CodegenEvent> for CodegenAlternative {}
244
245impl CodegenAlternative {
246 pub fn new(
247 buffer: Entity<MultiBuffer>,
248 range: Range<Anchor>,
249 active: bool,
250 telemetry: Option<Arc<Telemetry>>,
251 builder: Arc<PromptBuilder>,
252 cx: &mut Context<Self>,
253 ) -> Self {
254 let snapshot = buffer.read(cx).snapshot(cx);
255
256 let (old_buffer, _, _) = snapshot
257 .range_to_buffer_ranges(range.clone())
258 .pop()
259 .unwrap();
260 let old_buffer = cx.new(|cx| {
261 let text = old_buffer.as_rope().clone();
262 let line_ending = old_buffer.line_ending();
263 let language = old_buffer.language().cloned();
264 let language_registry = buffer
265 .read(cx)
266 .buffer(old_buffer.remote_id())
267 .unwrap()
268 .read(cx)
269 .language_registry();
270
271 let mut buffer = Buffer::local_normalized(text, line_ending, cx);
272 buffer.set_language(language, cx);
273 if let Some(language_registry) = language_registry {
274 buffer.set_language_registry(language_registry)
275 }
276 buffer
277 });
278
279 Self {
280 buffer: buffer.clone(),
281 old_buffer,
282 edit_position: None,
283 message_id: None,
284 snapshot,
285 last_equal_ranges: Default::default(),
286 transformation_transaction_id: None,
287 status: CodegenStatus::Idle,
288 generation: Task::ready(()),
289 diff: Diff::default(),
290 telemetry,
291 _subscription: cx.subscribe(&buffer, Self::handle_buffer_event),
292 builder,
293 active,
294 edits: Vec::new(),
295 line_operations: Vec::new(),
296 range,
297 elapsed_time: None,
298 completion: None,
299 }
300 }
301
302 pub fn set_active(&mut self, active: bool, cx: &mut Context<Self>) {
303 if active != self.active {
304 self.active = active;
305
306 if self.active {
307 let edits = self.edits.clone();
308 self.apply_edits(edits, cx);
309 if matches!(self.status, CodegenStatus::Pending) {
310 let line_operations = self.line_operations.clone();
311 self.reapply_line_based_diff(line_operations, cx);
312 } else {
313 self.reapply_batch_diff(cx).detach();
314 }
315 } else if let Some(transaction_id) = self.transformation_transaction_id.take() {
316 self.buffer.update(cx, |buffer, cx| {
317 buffer.undo_transaction(transaction_id, cx);
318 buffer.forget_transaction(transaction_id, cx);
319 });
320 }
321 }
322 }
323
324 fn handle_buffer_event(
325 &mut self,
326 _buffer: Entity<MultiBuffer>,
327 event: &multi_buffer::Event,
328 cx: &mut Context<Self>,
329 ) {
330 if let multi_buffer::Event::TransactionUndone { transaction_id } = event
331 && self.transformation_transaction_id == Some(*transaction_id)
332 {
333 self.transformation_transaction_id = None;
334 self.generation = Task::ready(());
335 cx.emit(CodegenEvent::Undone);
336 }
337 }
338
339 pub fn last_equal_ranges(&self) -> &[Range<Anchor>] {
340 &self.last_equal_ranges
341 }
342
343 pub fn start(
344 &mut self,
345 user_prompt: String,
346 context_task: Shared<Task<Option<LoadedContext>>>,
347 model: Arc<dyn LanguageModel>,
348 cx: &mut Context<Self>,
349 ) -> Result<()> {
350 if let Some(transformation_transaction_id) = self.transformation_transaction_id.take() {
351 self.buffer.update(cx, |buffer, cx| {
352 buffer.undo_transaction(transformation_transaction_id, cx);
353 });
354 }
355
356 self.edit_position = Some(self.range.start.bias_right(&self.snapshot));
357
358 let api_key = model.api_key(cx);
359 let telemetry_id = model.telemetry_id();
360 let provider_id = model.provider_id();
361 let stream: LocalBoxFuture<Result<LanguageModelTextStream>> =
362 if user_prompt.trim().to_lowercase() == "delete" {
363 async { Ok(LanguageModelTextStream::default()) }.boxed_local()
364 } else {
365 let request = self.build_request(&model, user_prompt, context_task, cx)?;
366 cx.spawn(async move |_, cx| {
367 Ok(model.stream_completion_text(request.await, cx).await?)
368 })
369 .boxed_local()
370 };
371 self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
372 Ok(())
373 }
374
375 fn build_request(
376 &self,
377 model: &Arc<dyn LanguageModel>,
378 user_prompt: String,
379 context_task: Shared<Task<Option<LoadedContext>>>,
380 cx: &mut App,
381 ) -> Result<Task<LanguageModelRequest>> {
382 let buffer = self.buffer.read(cx).snapshot(cx);
383 let language = buffer.language_at(self.range.start);
384 let language_name = if let Some(language) = language.as_ref() {
385 if Arc::ptr_eq(language, &language::PLAIN_TEXT) {
386 None
387 } else {
388 Some(language.name())
389 }
390 } else {
391 None
392 };
393
394 let language_name = language_name.as_ref();
395 let start = buffer.point_to_buffer_offset(self.range.start);
396 let end = buffer.point_to_buffer_offset(self.range.end);
397 let (buffer, range) = if let Some((start, end)) = start.zip(end) {
398 let (start_buffer, start_buffer_offset) = start;
399 let (end_buffer, end_buffer_offset) = end;
400 if start_buffer.remote_id() == end_buffer.remote_id() {
401 (start_buffer.clone(), start_buffer_offset..end_buffer_offset)
402 } else {
403 anyhow::bail!("invalid transformation range");
404 }
405 } else {
406 anyhow::bail!("invalid transformation range");
407 };
408
409 let prompt = self
410 .builder
411 .generate_inline_transformation_prompt(
412 user_prompt,
413 language_name,
414 buffer,
415 range.start.0..range.end.0,
416 )
417 .context("generating content prompt")?;
418
419 let temperature = AgentSettings::temperature_for_model(model, cx);
420
421 Ok(cx.spawn(async move |_cx| {
422 let mut request_message = LanguageModelRequestMessage {
423 role: Role::User,
424 content: Vec::new(),
425 cache: false,
426 };
427
428 if let Some(context) = context_task.await {
429 context.add_to_request_message(&mut request_message);
430 }
431
432 request_message.content.push(prompt.into());
433
434 LanguageModelRequest {
435 thread_id: None,
436 prompt_id: None,
437 intent: Some(CompletionIntent::InlineAssist),
438 mode: None,
439 tools: Vec::new(),
440 tool_choice: None,
441 stop: Vec::new(),
442 temperature,
443 messages: vec![request_message],
444 thinking_allowed: false,
445 }
446 }))
447 }
448
449 pub fn handle_stream(
450 &mut self,
451 model_telemetry_id: String,
452 model_provider_id: String,
453 model_api_key: Option<String>,
454 stream: impl 'static + Future<Output = Result<LanguageModelTextStream>>,
455 cx: &mut Context<Self>,
456 ) {
457 let start_time = Instant::now();
458
459 // Make a new snapshot and re-resolve anchor in case the document was modified.
460 // This can happen often if the editor loses focus and is saved + reformatted,
461 // as in https://github.com/zed-industries/zed/issues/39088
462 self.snapshot = self.buffer.read(cx).snapshot(cx);
463 self.range = self.snapshot.anchor_after(self.range.start)
464 ..self.snapshot.anchor_after(self.range.end);
465
466 let snapshot = self.snapshot.clone();
467 let selected_text = snapshot
468 .text_for_range(self.range.start..self.range.end)
469 .collect::<Rope>();
470
471 let selection_start = self.range.start.to_point(&snapshot);
472
473 // Start with the indentation of the first line in the selection
474 let mut suggested_line_indent = snapshot
475 .suggested_indents(selection_start.row..=selection_start.row, cx)
476 .into_values()
477 .next()
478 .unwrap_or_else(|| snapshot.indent_size_for_line(MultiBufferRow(selection_start.row)));
479
480 // If the first line in the selection does not have indentation, check the following lines
481 if suggested_line_indent.len == 0 && suggested_line_indent.kind == IndentKind::Space {
482 for row in selection_start.row..=self.range.end.to_point(&snapshot).row {
483 let line_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
484 // Prefer tabs if a line in the selection uses tabs as indentation
485 if line_indent.kind == IndentKind::Tab {
486 suggested_line_indent.kind = IndentKind::Tab;
487 break;
488 }
489 }
490 }
491
492 let http_client = cx.http_client();
493 let telemetry = self.telemetry.clone();
494 let language_name = {
495 let multibuffer = self.buffer.read(cx);
496 let snapshot = multibuffer.snapshot(cx);
497 let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
498 ranges
499 .first()
500 .and_then(|(buffer, _, _)| buffer.language())
501 .map(|language| language.name())
502 };
503
504 self.diff = Diff::default();
505 self.status = CodegenStatus::Pending;
506 let mut edit_start = self.range.start.to_offset(&snapshot);
507 let completion = Arc::new(Mutex::new(String::new()));
508 let completion_clone = completion.clone();
509
510 self.generation = cx.spawn(async move |codegen, cx| {
511 let stream = stream.await;
512 let token_usage = stream
513 .as_ref()
514 .ok()
515 .map(|stream| stream.last_token_usage.clone());
516 let message_id = stream
517 .as_ref()
518 .ok()
519 .and_then(|stream| stream.message_id.clone());
520 let generate = async {
521 let model_telemetry_id = model_telemetry_id.clone();
522 let model_provider_id = model_provider_id.clone();
523 let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
524 let executor = cx.background_executor().clone();
525 let message_id = message_id.clone();
526 let line_based_stream_diff: Task<anyhow::Result<()>> =
527 cx.background_spawn(async move {
528 let mut response_latency = None;
529 let request_start = Instant::now();
530 let diff = async {
531 let chunks = StripInvalidSpans::new(
532 stream?.stream.map_err(|error| error.into()),
533 );
534 futures::pin_mut!(chunks);
535 let mut diff = StreamingDiff::new(selected_text.to_string());
536 let mut line_diff = LineDiff::default();
537
538 let mut new_text = String::new();
539 let mut base_indent = None;
540 let mut line_indent = None;
541 let mut first_line = true;
542
543 while let Some(chunk) = chunks.next().await {
544 if response_latency.is_none() {
545 response_latency = Some(request_start.elapsed());
546 }
547 let chunk = chunk?;
548 completion_clone.lock().push_str(&chunk);
549
550 let mut lines = chunk.split('\n').peekable();
551 while let Some(line) = lines.next() {
552 new_text.push_str(line);
553 if line_indent.is_none()
554 && let Some(non_whitespace_ch_ix) =
555 new_text.find(|ch: char| !ch.is_whitespace())
556 {
557 line_indent = Some(non_whitespace_ch_ix);
558 base_indent = base_indent.or(line_indent);
559
560 let line_indent = line_indent.unwrap();
561 let base_indent = base_indent.unwrap();
562 let indent_delta = line_indent as i32 - base_indent as i32;
563 let mut corrected_indent_len = cmp::max(
564 0,
565 suggested_line_indent.len as i32 + indent_delta,
566 )
567 as usize;
568 if first_line {
569 corrected_indent_len = corrected_indent_len
570 .saturating_sub(selection_start.column as usize);
571 }
572
573 let indent_char = suggested_line_indent.char();
574 let mut indent_buffer = [0; 4];
575 let indent_str =
576 indent_char.encode_utf8(&mut indent_buffer);
577 new_text.replace_range(
578 ..line_indent,
579 &indent_str.repeat(corrected_indent_len),
580 );
581 }
582
583 if line_indent.is_some() {
584 let char_ops = diff.push_new(&new_text);
585 line_diff.push_char_operations(&char_ops, &selected_text);
586 diff_tx
587 .send((char_ops, line_diff.line_operations()))
588 .await?;
589 new_text.clear();
590 }
591
592 if lines.peek().is_some() {
593 let char_ops = diff.push_new("\n");
594 line_diff.push_char_operations(&char_ops, &selected_text);
595 diff_tx
596 .send((char_ops, line_diff.line_operations()))
597 .await?;
598 if line_indent.is_none() {
599 // Don't write out the leading indentation in empty lines on the next line
600 // This is the case where the above if statement didn't clear the buffer
601 new_text.clear();
602 }
603 line_indent = None;
604 first_line = false;
605 }
606 }
607 }
608
609 let mut char_ops = diff.push_new(&new_text);
610 char_ops.extend(diff.finish());
611 line_diff.push_char_operations(&char_ops, &selected_text);
612 line_diff.finish(&selected_text);
613 diff_tx
614 .send((char_ops, line_diff.line_operations()))
615 .await?;
616
617 anyhow::Ok(())
618 };
619
620 let result = diff.await;
621
622 let error_message = result.as_ref().err().map(|error| error.to_string());
623 report_assistant_event(
624 AssistantEventData {
625 conversation_id: None,
626 message_id,
627 kind: AssistantKind::Inline,
628 phase: AssistantPhase::Response,
629 model: model_telemetry_id,
630 model_provider: model_provider_id,
631 response_latency,
632 error_message,
633 language_name: language_name.map(|name| name.to_proto()),
634 },
635 telemetry,
636 http_client,
637 model_api_key,
638 &executor,
639 );
640
641 result?;
642 Ok(())
643 });
644
645 while let Some((char_ops, line_ops)) = diff_rx.next().await {
646 codegen.update(cx, |codegen, cx| {
647 codegen.last_equal_ranges.clear();
648
649 let edits = char_ops
650 .into_iter()
651 .filter_map(|operation| match operation {
652 CharOperation::Insert { text } => {
653 let edit_start = snapshot.anchor_after(edit_start);
654 Some((edit_start..edit_start, text))
655 }
656 CharOperation::Delete { bytes } => {
657 let edit_end = edit_start + bytes;
658 let edit_range = snapshot.anchor_after(edit_start)
659 ..snapshot.anchor_before(edit_end);
660 edit_start = edit_end;
661 Some((edit_range, String::new()))
662 }
663 CharOperation::Keep { bytes } => {
664 let edit_end = edit_start + bytes;
665 let edit_range = snapshot.anchor_after(edit_start)
666 ..snapshot.anchor_before(edit_end);
667 edit_start = edit_end;
668 codegen.last_equal_ranges.push(edit_range);
669 None
670 }
671 })
672 .collect::<Vec<_>>();
673
674 if codegen.active {
675 codegen.apply_edits(edits.iter().cloned(), cx);
676 codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
677 }
678 codegen.edits.extend(edits);
679 codegen.line_operations = line_ops;
680 codegen.edit_position = Some(snapshot.anchor_after(edit_start));
681
682 cx.notify();
683 })?;
684 }
685
686 // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
687 // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
688 // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
689 let batch_diff_task =
690 codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
691 let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
692 line_based_stream_diff?;
693
694 anyhow::Ok(())
695 };
696
697 let result = generate.await;
698 let elapsed_time = start_time.elapsed().as_secs_f64();
699
700 codegen
701 .update(cx, |this, cx| {
702 this.message_id = message_id;
703 this.last_equal_ranges.clear();
704 if let Err(error) = result {
705 this.status = CodegenStatus::Error(error);
706 } else {
707 this.status = CodegenStatus::Done;
708 }
709 this.elapsed_time = Some(elapsed_time);
710 this.completion = Some(completion.lock().clone());
711 if let Some(usage) = token_usage {
712 let usage = usage.lock();
713 telemetry::event!(
714 "Inline Assistant Completion",
715 model = model_telemetry_id,
716 model_provider = model_provider_id,
717 input_tokens = usage.input_tokens,
718 output_tokens = usage.output_tokens,
719 )
720 }
721 cx.emit(CodegenEvent::Finished);
722 cx.notify();
723 })
724 .ok();
725 });
726 cx.notify();
727 }
728
729 pub fn stop(&mut self, cx: &mut Context<Self>) {
730 self.last_equal_ranges.clear();
731 if self.diff.is_empty() {
732 self.status = CodegenStatus::Idle;
733 } else {
734 self.status = CodegenStatus::Done;
735 }
736 self.generation = Task::ready(());
737 cx.emit(CodegenEvent::Finished);
738 cx.notify();
739 }
740
741 pub fn undo(&mut self, cx: &mut Context<Self>) {
742 self.buffer.update(cx, |buffer, cx| {
743 if let Some(transaction_id) = self.transformation_transaction_id.take() {
744 buffer.undo_transaction(transaction_id, cx);
745 buffer.refresh_preview(cx);
746 }
747 });
748 }
749
750 fn apply_edits(
751 &mut self,
752 edits: impl IntoIterator<Item = (Range<Anchor>, String)>,
753 cx: &mut Context<CodegenAlternative>,
754 ) {
755 let transaction = self.buffer.update(cx, |buffer, cx| {
756 // Avoid grouping agent edits with user edits.
757 buffer.finalize_last_transaction(cx);
758 buffer.start_transaction(cx);
759 buffer.edit(edits, None, cx);
760 buffer.end_transaction(cx)
761 });
762
763 if let Some(transaction) = transaction {
764 if let Some(first_transaction) = self.transformation_transaction_id {
765 // Group all agent edits into the first transaction.
766 self.buffer.update(cx, |buffer, cx| {
767 buffer.merge_transactions(transaction, first_transaction, cx)
768 });
769 } else {
770 self.transformation_transaction_id = Some(transaction);
771 self.buffer
772 .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
773 }
774 }
775 }
776
777 fn reapply_line_based_diff(
778 &mut self,
779 line_operations: impl IntoIterator<Item = LineOperation>,
780 cx: &mut Context<Self>,
781 ) {
782 let old_snapshot = self.snapshot.clone();
783 let old_range = self.range.to_point(&old_snapshot);
784 let new_snapshot = self.buffer.read(cx).snapshot(cx);
785 let new_range = self.range.to_point(&new_snapshot);
786
787 let mut old_row = old_range.start.row;
788 let mut new_row = new_range.start.row;
789
790 self.diff.deleted_row_ranges.clear();
791 self.diff.inserted_row_ranges.clear();
792 for operation in line_operations {
793 match operation {
794 LineOperation::Keep { lines } => {
795 old_row += lines;
796 new_row += lines;
797 }
798 LineOperation::Delete { lines } => {
799 let old_end_row = old_row + lines - 1;
800 let new_row = new_snapshot.anchor_before(Point::new(new_row, 0));
801
802 if let Some((_, last_deleted_row_range)) =
803 self.diff.deleted_row_ranges.last_mut()
804 {
805 if *last_deleted_row_range.end() + 1 == old_row {
806 *last_deleted_row_range = *last_deleted_row_range.start()..=old_end_row;
807 } else {
808 self.diff
809 .deleted_row_ranges
810 .push((new_row, old_row..=old_end_row));
811 }
812 } else {
813 self.diff
814 .deleted_row_ranges
815 .push((new_row, old_row..=old_end_row));
816 }
817
818 old_row += lines;
819 }
820 LineOperation::Insert { lines } => {
821 let new_end_row = new_row + lines - 1;
822 let start = new_snapshot.anchor_before(Point::new(new_row, 0));
823 let end = new_snapshot.anchor_before(Point::new(
824 new_end_row,
825 new_snapshot.line_len(MultiBufferRow(new_end_row)),
826 ));
827 self.diff.inserted_row_ranges.push(start..end);
828 new_row += lines;
829 }
830 }
831
832 cx.notify();
833 }
834 }
835
836 fn reapply_batch_diff(&mut self, cx: &mut Context<Self>) -> Task<()> {
837 let old_snapshot = self.snapshot.clone();
838 let old_range = self.range.to_point(&old_snapshot);
839 let new_snapshot = self.buffer.read(cx).snapshot(cx);
840 let new_range = self.range.to_point(&new_snapshot);
841
842 cx.spawn(async move |codegen, cx| {
843 let (deleted_row_ranges, inserted_row_ranges) = cx
844 .background_spawn(async move {
845 let old_text = old_snapshot
846 .text_for_range(
847 Point::new(old_range.start.row, 0)
848 ..Point::new(
849 old_range.end.row,
850 old_snapshot.line_len(MultiBufferRow(old_range.end.row)),
851 ),
852 )
853 .collect::<String>();
854 let new_text = new_snapshot
855 .text_for_range(
856 Point::new(new_range.start.row, 0)
857 ..Point::new(
858 new_range.end.row,
859 new_snapshot.line_len(MultiBufferRow(new_range.end.row)),
860 ),
861 )
862 .collect::<String>();
863
864 let old_start_row = old_range.start.row;
865 let new_start_row = new_range.start.row;
866 let mut deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)> = Vec::new();
867 let mut inserted_row_ranges = Vec::new();
868 for (old_rows, new_rows) in line_diff(&old_text, &new_text) {
869 let old_rows = old_start_row + old_rows.start..old_start_row + old_rows.end;
870 let new_rows = new_start_row + new_rows.start..new_start_row + new_rows.end;
871 if !old_rows.is_empty() {
872 deleted_row_ranges.push((
873 new_snapshot.anchor_before(Point::new(new_rows.start, 0)),
874 old_rows.start..=old_rows.end - 1,
875 ));
876 }
877 if !new_rows.is_empty() {
878 let start = new_snapshot.anchor_before(Point::new(new_rows.start, 0));
879 let new_end_row = new_rows.end - 1;
880 let end = new_snapshot.anchor_before(Point::new(
881 new_end_row,
882 new_snapshot.line_len(MultiBufferRow(new_end_row)),
883 ));
884 inserted_row_ranges.push(start..end);
885 }
886 }
887 (deleted_row_ranges, inserted_row_ranges)
888 })
889 .await;
890
891 codegen
892 .update(cx, |codegen, cx| {
893 codegen.diff.deleted_row_ranges = deleted_row_ranges;
894 codegen.diff.inserted_row_ranges = inserted_row_ranges;
895 cx.notify();
896 })
897 .ok();
898 })
899 }
900}
901
902#[derive(Copy, Clone, Debug)]
903pub enum CodegenEvent {
904 Finished,
905 Undone,
906}
907
908struct StripInvalidSpans<T> {
909 stream: T,
910 stream_done: bool,
911 buffer: String,
912 first_line: bool,
913 line_end: bool,
914 starts_with_code_block: bool,
915}
916
917impl<T> StripInvalidSpans<T>
918where
919 T: Stream<Item = Result<String>>,
920{
921 fn new(stream: T) -> Self {
922 Self {
923 stream,
924 stream_done: false,
925 buffer: String::new(),
926 first_line: true,
927 line_end: false,
928 starts_with_code_block: false,
929 }
930 }
931}
932
933impl<T> Stream for StripInvalidSpans<T>
934where
935 T: Stream<Item = Result<String>>,
936{
937 type Item = Result<String>;
938
939 fn poll_next(self: Pin<&mut Self>, cx: &mut task::Context) -> Poll<Option<Self::Item>> {
940 const CODE_BLOCK_DELIMITER: &str = "```";
941 const CURSOR_SPAN: &str = "<|CURSOR|>";
942
943 let this = unsafe { self.get_unchecked_mut() };
944 loop {
945 if !this.stream_done {
946 let mut stream = unsafe { Pin::new_unchecked(&mut this.stream) };
947 match stream.as_mut().poll_next(cx) {
948 Poll::Ready(Some(Ok(chunk))) => {
949 this.buffer.push_str(&chunk);
950 }
951 Poll::Ready(Some(Err(error))) => return Poll::Ready(Some(Err(error))),
952 Poll::Ready(None) => {
953 this.stream_done = true;
954 }
955 Poll::Pending => return Poll::Pending,
956 }
957 }
958
959 let mut chunk = String::new();
960 let mut consumed = 0;
961 if !this.buffer.is_empty() {
962 let mut lines = this.buffer.split('\n').enumerate().peekable();
963 while let Some((line_ix, line)) = lines.next() {
964 if line_ix > 0 {
965 this.first_line = false;
966 }
967
968 if this.first_line {
969 let trimmed_line = line.trim();
970 if lines.peek().is_some() {
971 if trimmed_line.starts_with(CODE_BLOCK_DELIMITER) {
972 consumed += line.len() + 1;
973 this.starts_with_code_block = true;
974 continue;
975 }
976 } else if trimmed_line.is_empty()
977 || prefixes(CODE_BLOCK_DELIMITER)
978 .any(|prefix| trimmed_line.starts_with(prefix))
979 {
980 break;
981 }
982 }
983
984 let line_without_cursor = line.replace(CURSOR_SPAN, "");
985 if lines.peek().is_some() {
986 if this.line_end {
987 chunk.push('\n');
988 }
989
990 chunk.push_str(&line_without_cursor);
991 this.line_end = true;
992 consumed += line.len() + 1;
993 } else if this.stream_done {
994 if !this.starts_with_code_block
995 || !line_without_cursor.trim().ends_with(CODE_BLOCK_DELIMITER)
996 {
997 if this.line_end {
998 chunk.push('\n');
999 }
1000
1001 chunk.push_str(line);
1002 }
1003
1004 consumed += line.len();
1005 } else {
1006 let trimmed_line = line.trim();
1007 if trimmed_line.is_empty()
1008 || prefixes(CURSOR_SPAN).any(|prefix| trimmed_line.ends_with(prefix))
1009 || prefixes(CODE_BLOCK_DELIMITER)
1010 .any(|prefix| trimmed_line.ends_with(prefix))
1011 {
1012 break;
1013 } else {
1014 if this.line_end {
1015 chunk.push('\n');
1016 this.line_end = false;
1017 }
1018
1019 chunk.push_str(&line_without_cursor);
1020 consumed += line.len();
1021 }
1022 }
1023 }
1024 }
1025
1026 this.buffer = this.buffer.split_off(consumed);
1027 if !chunk.is_empty() {
1028 return Poll::Ready(Some(Ok(chunk)));
1029 } else if this.stream_done {
1030 return Poll::Ready(None);
1031 }
1032 }
1033 }
1034}
1035
1036fn prefixes(text: &str) -> impl Iterator<Item = &str> {
1037 (0..text.len() - 1).map(|ix| &text[..ix + 1])
1038}
1039
1040#[derive(Default)]
1041pub struct Diff {
1042 pub deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)>,
1043 pub inserted_row_ranges: Vec<Range<Anchor>>,
1044}
1045
1046impl Diff {
1047 fn is_empty(&self) -> bool {
1048 self.deleted_row_ranges.is_empty() && self.inserted_row_ranges.is_empty()
1049 }
1050}
1051
1052#[cfg(test)]
1053mod tests {
1054 use super::*;
1055 use futures::{
1056 Stream,
1057 stream::{self},
1058 };
1059 use gpui::TestAppContext;
1060 use indoc::indoc;
1061 use language::{Buffer, Language, LanguageConfig, LanguageMatcher, Point, tree_sitter_rust};
1062 use language_model::{LanguageModelRegistry, TokenUsage};
1063 use rand::prelude::*;
1064 use settings::SettingsStore;
1065 use std::{future, sync::Arc};
1066
1067 #[gpui::test(iterations = 10)]
1068 async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
1069 init_test(cx);
1070
1071 let text = indoc! {"
1072 fn main() {
1073 let x = 0;
1074 for _ in 0..10 {
1075 x += 1;
1076 }
1077 }
1078 "};
1079 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1080 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1081 let range = buffer.read_with(cx, |buffer, cx| {
1082 let snapshot = buffer.snapshot(cx);
1083 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
1084 });
1085 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1086 let codegen = cx.new(|cx| {
1087 CodegenAlternative::new(
1088 buffer.clone(),
1089 range.clone(),
1090 true,
1091 None,
1092 prompt_builder,
1093 cx,
1094 )
1095 });
1096
1097 let chunks_tx = simulate_response_stream(&codegen, cx);
1098
1099 let mut new_text = concat!(
1100 " let mut x = 0;\n",
1101 " while x < 10 {\n",
1102 " x += 1;\n",
1103 " }",
1104 );
1105 while !new_text.is_empty() {
1106 let max_len = cmp::min(new_text.len(), 10);
1107 let len = rng.random_range(1..=max_len);
1108 let (chunk, suffix) = new_text.split_at(len);
1109 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1110 new_text = suffix;
1111 cx.background_executor.run_until_parked();
1112 }
1113 drop(chunks_tx);
1114 cx.background_executor.run_until_parked();
1115
1116 assert_eq!(
1117 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1118 indoc! {"
1119 fn main() {
1120 let mut x = 0;
1121 while x < 10 {
1122 x += 1;
1123 }
1124 }
1125 "}
1126 );
1127 }
1128
1129 #[gpui::test(iterations = 10)]
1130 async fn test_autoindent_when_generating_past_indentation(
1131 cx: &mut TestAppContext,
1132 mut rng: StdRng,
1133 ) {
1134 init_test(cx);
1135
1136 let text = indoc! {"
1137 fn main() {
1138 le
1139 }
1140 "};
1141 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1142 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1143 let range = buffer.read_with(cx, |buffer, cx| {
1144 let snapshot = buffer.snapshot(cx);
1145 snapshot.anchor_before(Point::new(1, 6))..snapshot.anchor_after(Point::new(1, 6))
1146 });
1147 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1148 let codegen = cx.new(|cx| {
1149 CodegenAlternative::new(
1150 buffer.clone(),
1151 range.clone(),
1152 true,
1153 None,
1154 prompt_builder,
1155 cx,
1156 )
1157 });
1158
1159 let chunks_tx = simulate_response_stream(&codegen, cx);
1160
1161 cx.background_executor.run_until_parked();
1162
1163 let mut new_text = concat!(
1164 "t mut x = 0;\n",
1165 "while x < 10 {\n",
1166 " x += 1;\n",
1167 "}", //
1168 );
1169 while !new_text.is_empty() {
1170 let max_len = cmp::min(new_text.len(), 10);
1171 let len = rng.random_range(1..=max_len);
1172 let (chunk, suffix) = new_text.split_at(len);
1173 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1174 new_text = suffix;
1175 cx.background_executor.run_until_parked();
1176 }
1177 drop(chunks_tx);
1178 cx.background_executor.run_until_parked();
1179
1180 assert_eq!(
1181 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1182 indoc! {"
1183 fn main() {
1184 let mut x = 0;
1185 while x < 10 {
1186 x += 1;
1187 }
1188 }
1189 "}
1190 );
1191 }
1192
1193 #[gpui::test(iterations = 10)]
1194 async fn test_autoindent_when_generating_before_indentation(
1195 cx: &mut TestAppContext,
1196 mut rng: StdRng,
1197 ) {
1198 init_test(cx);
1199
1200 let text = concat!(
1201 "fn main() {\n",
1202 " \n",
1203 "}\n" //
1204 );
1205 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1206 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1207 let range = buffer.read_with(cx, |buffer, cx| {
1208 let snapshot = buffer.snapshot(cx);
1209 snapshot.anchor_before(Point::new(1, 2))..snapshot.anchor_after(Point::new(1, 2))
1210 });
1211 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1212 let codegen = cx.new(|cx| {
1213 CodegenAlternative::new(
1214 buffer.clone(),
1215 range.clone(),
1216 true,
1217 None,
1218 prompt_builder,
1219 cx,
1220 )
1221 });
1222
1223 let chunks_tx = simulate_response_stream(&codegen, cx);
1224
1225 cx.background_executor.run_until_parked();
1226
1227 let mut new_text = concat!(
1228 "let mut x = 0;\n",
1229 "while x < 10 {\n",
1230 " x += 1;\n",
1231 "}", //
1232 );
1233 while !new_text.is_empty() {
1234 let max_len = cmp::min(new_text.len(), 10);
1235 let len = rng.random_range(1..=max_len);
1236 let (chunk, suffix) = new_text.split_at(len);
1237 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1238 new_text = suffix;
1239 cx.background_executor.run_until_parked();
1240 }
1241 drop(chunks_tx);
1242 cx.background_executor.run_until_parked();
1243
1244 assert_eq!(
1245 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1246 indoc! {"
1247 fn main() {
1248 let mut x = 0;
1249 while x < 10 {
1250 x += 1;
1251 }
1252 }
1253 "}
1254 );
1255 }
1256
1257 #[gpui::test(iterations = 10)]
1258 async fn test_autoindent_respects_tabs_in_selection(cx: &mut TestAppContext) {
1259 init_test(cx);
1260
1261 let text = indoc! {"
1262 func main() {
1263 \tx := 0
1264 \tfor i := 0; i < 10; i++ {
1265 \t\tx++
1266 \t}
1267 }
1268 "};
1269 let buffer = cx.new(|cx| Buffer::local(text, cx));
1270 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1271 let range = buffer.read_with(cx, |buffer, cx| {
1272 let snapshot = buffer.snapshot(cx);
1273 snapshot.anchor_before(Point::new(0, 0))..snapshot.anchor_after(Point::new(4, 2))
1274 });
1275 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1276 let codegen = cx.new(|cx| {
1277 CodegenAlternative::new(
1278 buffer.clone(),
1279 range.clone(),
1280 true,
1281 None,
1282 prompt_builder,
1283 cx,
1284 )
1285 });
1286
1287 let chunks_tx = simulate_response_stream(&codegen, cx);
1288 let new_text = concat!(
1289 "func main() {\n",
1290 "\tx := 0\n",
1291 "\tfor x < 10 {\n",
1292 "\t\tx++\n",
1293 "\t}", //
1294 );
1295 chunks_tx.unbounded_send(new_text.to_string()).unwrap();
1296 drop(chunks_tx);
1297 cx.background_executor.run_until_parked();
1298
1299 assert_eq!(
1300 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1301 indoc! {"
1302 func main() {
1303 \tx := 0
1304 \tfor x < 10 {
1305 \t\tx++
1306 \t}
1307 }
1308 "}
1309 );
1310 }
1311
1312 #[gpui::test]
1313 async fn test_inactive_codegen_alternative(cx: &mut TestAppContext) {
1314 init_test(cx);
1315
1316 let text = indoc! {"
1317 fn main() {
1318 let x = 0;
1319 }
1320 "};
1321 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1322 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1323 let range = buffer.read_with(cx, |buffer, cx| {
1324 let snapshot = buffer.snapshot(cx);
1325 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(1, 14))
1326 });
1327 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1328 let codegen = cx.new(|cx| {
1329 CodegenAlternative::new(
1330 buffer.clone(),
1331 range.clone(),
1332 false,
1333 None,
1334 prompt_builder,
1335 cx,
1336 )
1337 });
1338
1339 let chunks_tx = simulate_response_stream(&codegen, cx);
1340 chunks_tx
1341 .unbounded_send("let mut x = 0;\nx += 1;".to_string())
1342 .unwrap();
1343 drop(chunks_tx);
1344 cx.run_until_parked();
1345
1346 // The codegen is inactive, so the buffer doesn't get modified.
1347 assert_eq!(
1348 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1349 text
1350 );
1351
1352 // Activating the codegen applies the changes.
1353 codegen.update(cx, |codegen, cx| codegen.set_active(true, cx));
1354 assert_eq!(
1355 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1356 indoc! {"
1357 fn main() {
1358 let mut x = 0;
1359 x += 1;
1360 }
1361 "}
1362 );
1363
1364 // Deactivating the codegen undoes the changes.
1365 codegen.update(cx, |codegen, cx| codegen.set_active(false, cx));
1366 cx.run_until_parked();
1367 assert_eq!(
1368 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1369 text
1370 );
1371 }
1372
1373 #[gpui::test]
1374 async fn test_strip_invalid_spans_from_codeblock() {
1375 assert_chunks("Lorem ipsum dolor", "Lorem ipsum dolor").await;
1376 assert_chunks("```\nLorem ipsum dolor", "Lorem ipsum dolor").await;
1377 assert_chunks("```\nLorem ipsum dolor\n```", "Lorem ipsum dolor").await;
1378 assert_chunks(
1379 "```html\n```js\nLorem ipsum dolor\n```\n```",
1380 "```js\nLorem ipsum dolor\n```",
1381 )
1382 .await;
1383 assert_chunks("``\nLorem ipsum dolor\n```", "``\nLorem ipsum dolor\n```").await;
1384 assert_chunks("Lorem<|CURSOR|> ipsum", "Lorem ipsum").await;
1385 assert_chunks("Lorem ipsum", "Lorem ipsum").await;
1386 assert_chunks("```\n<|CURSOR|>Lorem ipsum\n```", "Lorem ipsum").await;
1387
1388 async fn assert_chunks(text: &str, expected_text: &str) {
1389 for chunk_size in 1..=text.len() {
1390 let actual_text = StripInvalidSpans::new(chunks(text, chunk_size))
1391 .map(|chunk| chunk.unwrap())
1392 .collect::<String>()
1393 .await;
1394 assert_eq!(
1395 actual_text, expected_text,
1396 "failed to strip invalid spans, chunk size: {}",
1397 chunk_size
1398 );
1399 }
1400 }
1401
1402 fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
1403 stream::iter(
1404 text.chars()
1405 .collect::<Vec<_>>()
1406 .chunks(size)
1407 .map(|chunk| Ok(chunk.iter().collect::<String>()))
1408 .collect::<Vec<_>>(),
1409 )
1410 }
1411 }
1412
1413 fn init_test(cx: &mut TestAppContext) {
1414 cx.update(LanguageModelRegistry::test);
1415 cx.set_global(cx.update(SettingsStore::test));
1416 }
1417
1418 fn simulate_response_stream(
1419 codegen: &Entity<CodegenAlternative>,
1420 cx: &mut TestAppContext,
1421 ) -> mpsc::UnboundedSender<String> {
1422 let (chunks_tx, chunks_rx) = mpsc::unbounded();
1423 codegen.update(cx, |codegen, cx| {
1424 codegen.handle_stream(
1425 String::new(),
1426 String::new(),
1427 None,
1428 future::ready(Ok(LanguageModelTextStream {
1429 message_id: None,
1430 stream: chunks_rx.map(Ok).boxed(),
1431 last_token_usage: Arc::new(Mutex::new(TokenUsage::default())),
1432 })),
1433 cx,
1434 );
1435 });
1436 chunks_tx
1437 }
1438
1439 fn rust_lang() -> Language {
1440 Language::new(
1441 LanguageConfig {
1442 name: "Rust".into(),
1443 matcher: LanguageMatcher {
1444 path_suffixes: vec!["rs".to_string()],
1445 ..Default::default()
1446 },
1447 ..Default::default()
1448 },
1449 Some(tree_sitter_rust::LANGUAGE.into()),
1450 )
1451 .with_indents_query(
1452 r#"
1453 (call_expression) @indent
1454 (field_expression) @indent
1455 (_ "(" ")" @end) @indent
1456 (_ "{" "}" @end) @indent
1457 "#,
1458 )
1459 .unwrap()
1460 }
1461}