1use crate::inline_prompt_editor::CodegenStatus;
2use agent::{
3 ContextStore,
4 context::{ContextLoadResult, load_context},
5};
6use agent_settings::AgentSettings;
7use anyhow::{Context as _, Result};
8use client::telemetry::Telemetry;
9use cloud_llm_client::CompletionIntent;
10use collections::HashSet;
11use editor::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint};
12use futures::{
13 SinkExt, Stream, StreamExt, TryStreamExt as _, channel::mpsc, future::LocalBoxFuture, join,
14};
15use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Subscription, Task, WeakEntity};
16use language::{Buffer, IndentKind, Point, TransactionId, line_diff};
17use language_model::{
18 LanguageModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
19 LanguageModelTextStream, Role, report_assistant_event,
20};
21use multi_buffer::MultiBufferRow;
22use parking_lot::Mutex;
23use project::Project;
24use prompt_store::{PromptBuilder, PromptStore};
25use rope::Rope;
26use smol::future::FutureExt;
27use std::{
28 cmp,
29 future::Future,
30 iter,
31 ops::{Range, RangeInclusive},
32 pin::Pin,
33 sync::Arc,
34 task::{self, Poll},
35 time::Instant,
36};
37use streaming_diff::{CharOperation, LineDiff, LineOperation, StreamingDiff};
38use telemetry_events::{AssistantEventData, AssistantKind, AssistantPhase};
39
40pub struct BufferCodegen {
41 alternatives: Vec<Entity<CodegenAlternative>>,
42 pub active_alternative: usize,
43 seen_alternatives: HashSet<usize>,
44 subscriptions: Vec<Subscription>,
45 buffer: Entity<MultiBuffer>,
46 range: Range<Anchor>,
47 initial_transaction_id: Option<TransactionId>,
48 context_store: Entity<ContextStore>,
49 project: WeakEntity<Project>,
50 prompt_store: Option<Entity<PromptStore>>,
51 telemetry: Arc<Telemetry>,
52 builder: Arc<PromptBuilder>,
53 pub is_insertion: bool,
54}
55
56impl BufferCodegen {
57 pub fn new(
58 buffer: Entity<MultiBuffer>,
59 range: Range<Anchor>,
60 initial_transaction_id: Option<TransactionId>,
61 context_store: Entity<ContextStore>,
62 project: WeakEntity<Project>,
63 prompt_store: Option<Entity<PromptStore>>,
64 telemetry: Arc<Telemetry>,
65 builder: Arc<PromptBuilder>,
66 cx: &mut Context<Self>,
67 ) -> Self {
68 let codegen = cx.new(|cx| {
69 CodegenAlternative::new(
70 buffer.clone(),
71 range.clone(),
72 false,
73 Some(context_store.clone()),
74 project.clone(),
75 prompt_store.clone(),
76 Some(telemetry.clone()),
77 builder.clone(),
78 cx,
79 )
80 });
81 let mut this = Self {
82 is_insertion: range.to_offset(&buffer.read(cx).snapshot(cx)).is_empty(),
83 alternatives: vec![codegen],
84 active_alternative: 0,
85 seen_alternatives: HashSet::default(),
86 subscriptions: Vec::new(),
87 buffer,
88 range,
89 initial_transaction_id,
90 context_store,
91 project,
92 prompt_store,
93 telemetry,
94 builder,
95 };
96 this.activate(0, cx);
97 this
98 }
99
100 fn subscribe_to_alternative(&mut self, cx: &mut Context<Self>) {
101 let codegen = self.active_alternative().clone();
102 self.subscriptions.clear();
103 self.subscriptions
104 .push(cx.observe(&codegen, |_, _, cx| cx.notify()));
105 self.subscriptions
106 .push(cx.subscribe(&codegen, |_, _, event, cx| cx.emit(*event)));
107 }
108
109 pub fn active_alternative(&self) -> &Entity<CodegenAlternative> {
110 &self.alternatives[self.active_alternative]
111 }
112
113 pub fn status<'a>(&self, cx: &'a App) -> &'a CodegenStatus {
114 &self.active_alternative().read(cx).status
115 }
116
117 pub fn alternative_count(&self, cx: &App) -> usize {
118 LanguageModelRegistry::read_global(cx)
119 .inline_alternative_models()
120 .len()
121 + 1
122 }
123
124 pub fn cycle_prev(&mut self, cx: &mut Context<Self>) {
125 let next_active_ix = if self.active_alternative == 0 {
126 self.alternatives.len() - 1
127 } else {
128 self.active_alternative - 1
129 };
130 self.activate(next_active_ix, cx);
131 }
132
133 pub fn cycle_next(&mut self, cx: &mut Context<Self>) {
134 let next_active_ix = (self.active_alternative + 1) % self.alternatives.len();
135 self.activate(next_active_ix, cx);
136 }
137
138 fn activate(&mut self, index: usize, cx: &mut Context<Self>) {
139 self.active_alternative()
140 .update(cx, |codegen, cx| codegen.set_active(false, cx));
141 self.seen_alternatives.insert(index);
142 self.active_alternative = index;
143 self.active_alternative()
144 .update(cx, |codegen, cx| codegen.set_active(true, cx));
145 self.subscribe_to_alternative(cx);
146 cx.notify();
147 }
148
149 pub fn start(
150 &mut self,
151 primary_model: Arc<dyn LanguageModel>,
152 user_prompt: String,
153 cx: &mut Context<Self>,
154 ) -> Result<()> {
155 let alternative_models = LanguageModelRegistry::read_global(cx)
156 .inline_alternative_models()
157 .to_vec();
158
159 self.active_alternative()
160 .update(cx, |alternative, cx| alternative.undo(cx));
161 self.activate(0, cx);
162 self.alternatives.truncate(1);
163
164 for _ in 0..alternative_models.len() {
165 self.alternatives.push(cx.new(|cx| {
166 CodegenAlternative::new(
167 self.buffer.clone(),
168 self.range.clone(),
169 false,
170 Some(self.context_store.clone()),
171 self.project.clone(),
172 self.prompt_store.clone(),
173 Some(self.telemetry.clone()),
174 self.builder.clone(),
175 cx,
176 )
177 }));
178 }
179
180 for (model, alternative) in iter::once(primary_model)
181 .chain(alternative_models)
182 .zip(&self.alternatives)
183 {
184 alternative.update(cx, |alternative, cx| {
185 alternative.start(user_prompt.clone(), model.clone(), cx)
186 })?;
187 }
188
189 Ok(())
190 }
191
192 pub fn stop(&mut self, cx: &mut Context<Self>) {
193 for codegen in &self.alternatives {
194 codegen.update(cx, |codegen, cx| codegen.stop(cx));
195 }
196 }
197
198 pub fn undo(&mut self, cx: &mut Context<Self>) {
199 self.active_alternative()
200 .update(cx, |codegen, cx| codegen.undo(cx));
201
202 self.buffer.update(cx, |buffer, cx| {
203 if let Some(transaction_id) = self.initial_transaction_id.take() {
204 buffer.undo_transaction(transaction_id, cx);
205 buffer.refresh_preview(cx);
206 }
207 });
208 }
209
210 pub fn buffer(&self, cx: &App) -> Entity<MultiBuffer> {
211 self.active_alternative().read(cx).buffer.clone()
212 }
213
214 pub fn old_buffer(&self, cx: &App) -> Entity<Buffer> {
215 self.active_alternative().read(cx).old_buffer.clone()
216 }
217
218 pub fn snapshot(&self, cx: &App) -> MultiBufferSnapshot {
219 self.active_alternative().read(cx).snapshot.clone()
220 }
221
222 pub fn edit_position(&self, cx: &App) -> Option<Anchor> {
223 self.active_alternative().read(cx).edit_position
224 }
225
226 pub fn diff<'a>(&self, cx: &'a App) -> &'a Diff {
227 &self.active_alternative().read(cx).diff
228 }
229
230 pub fn last_equal_ranges<'a>(&self, cx: &'a App) -> &'a [Range<Anchor>] {
231 self.active_alternative().read(cx).last_equal_ranges()
232 }
233}
234
235impl EventEmitter<CodegenEvent> for BufferCodegen {}
236
237pub struct CodegenAlternative {
238 buffer: Entity<MultiBuffer>,
239 old_buffer: Entity<Buffer>,
240 snapshot: MultiBufferSnapshot,
241 edit_position: Option<Anchor>,
242 range: Range<Anchor>,
243 last_equal_ranges: Vec<Range<Anchor>>,
244 transformation_transaction_id: Option<TransactionId>,
245 status: CodegenStatus,
246 generation: Task<()>,
247 diff: Diff,
248 context_store: Option<Entity<ContextStore>>,
249 project: WeakEntity<Project>,
250 prompt_store: Option<Entity<PromptStore>>,
251 telemetry: Option<Arc<Telemetry>>,
252 _subscription: gpui::Subscription,
253 builder: Arc<PromptBuilder>,
254 active: bool,
255 edits: Vec<(Range<Anchor>, String)>,
256 line_operations: Vec<LineOperation>,
257 elapsed_time: Option<f64>,
258 completion: Option<String>,
259 pub message_id: Option<String>,
260}
261
262impl EventEmitter<CodegenEvent> for CodegenAlternative {}
263
264impl CodegenAlternative {
265 pub fn new(
266 buffer: Entity<MultiBuffer>,
267 range: Range<Anchor>,
268 active: bool,
269 context_store: Option<Entity<ContextStore>>,
270 project: WeakEntity<Project>,
271 prompt_store: Option<Entity<PromptStore>>,
272 telemetry: Option<Arc<Telemetry>>,
273 builder: Arc<PromptBuilder>,
274 cx: &mut Context<Self>,
275 ) -> Self {
276 let snapshot = buffer.read(cx).snapshot(cx);
277
278 let (old_buffer, _, _) = snapshot
279 .range_to_buffer_ranges(range.clone())
280 .pop()
281 .unwrap();
282 let old_buffer = cx.new(|cx| {
283 let text = old_buffer.as_rope().clone();
284 let line_ending = old_buffer.line_ending();
285 let language = old_buffer.language().cloned();
286 let language_registry = buffer
287 .read(cx)
288 .buffer(old_buffer.remote_id())
289 .unwrap()
290 .read(cx)
291 .language_registry();
292
293 let mut buffer = Buffer::local_normalized(text, line_ending, cx);
294 buffer.set_language(language, cx);
295 if let Some(language_registry) = language_registry {
296 buffer.set_language_registry(language_registry)
297 }
298 buffer
299 });
300
301 Self {
302 buffer: buffer.clone(),
303 old_buffer,
304 edit_position: None,
305 message_id: None,
306 snapshot,
307 last_equal_ranges: Default::default(),
308 transformation_transaction_id: None,
309 status: CodegenStatus::Idle,
310 generation: Task::ready(()),
311 diff: Diff::default(),
312 context_store,
313 project,
314 prompt_store,
315 telemetry,
316 _subscription: cx.subscribe(&buffer, Self::handle_buffer_event),
317 builder,
318 active,
319 edits: Vec::new(),
320 line_operations: Vec::new(),
321 range,
322 elapsed_time: None,
323 completion: None,
324 }
325 }
326
327 pub fn set_active(&mut self, active: bool, cx: &mut Context<Self>) {
328 if active != self.active {
329 self.active = active;
330
331 if self.active {
332 let edits = self.edits.clone();
333 self.apply_edits(edits, cx);
334 if matches!(self.status, CodegenStatus::Pending) {
335 let line_operations = self.line_operations.clone();
336 self.reapply_line_based_diff(line_operations, cx);
337 } else {
338 self.reapply_batch_diff(cx).detach();
339 }
340 } else if let Some(transaction_id) = self.transformation_transaction_id.take() {
341 self.buffer.update(cx, |buffer, cx| {
342 buffer.undo_transaction(transaction_id, cx);
343 buffer.forget_transaction(transaction_id, cx);
344 });
345 }
346 }
347 }
348
349 fn handle_buffer_event(
350 &mut self,
351 _buffer: Entity<MultiBuffer>,
352 event: &multi_buffer::Event,
353 cx: &mut Context<Self>,
354 ) {
355 if let multi_buffer::Event::TransactionUndone { transaction_id } = event
356 && self.transformation_transaction_id == Some(*transaction_id)
357 {
358 self.transformation_transaction_id = None;
359 self.generation = Task::ready(());
360 cx.emit(CodegenEvent::Undone);
361 }
362 }
363
364 pub fn last_equal_ranges(&self) -> &[Range<Anchor>] {
365 &self.last_equal_ranges
366 }
367
368 pub fn start(
369 &mut self,
370 user_prompt: String,
371 model: Arc<dyn LanguageModel>,
372 cx: &mut Context<Self>,
373 ) -> Result<()> {
374 if let Some(transformation_transaction_id) = self.transformation_transaction_id.take() {
375 self.buffer.update(cx, |buffer, cx| {
376 buffer.undo_transaction(transformation_transaction_id, cx);
377 });
378 }
379
380 self.edit_position = Some(self.range.start.bias_right(&self.snapshot));
381
382 let api_key = model.api_key(cx);
383 let telemetry_id = model.telemetry_id();
384 let provider_id = model.provider_id();
385 let stream: LocalBoxFuture<Result<LanguageModelTextStream>> =
386 if user_prompt.trim().to_lowercase() == "delete" {
387 async { Ok(LanguageModelTextStream::default()) }.boxed_local()
388 } else {
389 let request = self.build_request(&model, user_prompt, cx)?;
390 cx.spawn(async move |_, cx| {
391 Ok(model.stream_completion_text(request.await, cx).await?)
392 })
393 .boxed_local()
394 };
395 self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
396 Ok(())
397 }
398
399 fn build_request(
400 &self,
401 model: &Arc<dyn LanguageModel>,
402 user_prompt: String,
403 cx: &mut App,
404 ) -> Result<Task<LanguageModelRequest>> {
405 let buffer = self.buffer.read(cx).snapshot(cx);
406 let language = buffer.language_at(self.range.start);
407 let language_name = if let Some(language) = language.as_ref() {
408 if Arc::ptr_eq(language, &language::PLAIN_TEXT) {
409 None
410 } else {
411 Some(language.name())
412 }
413 } else {
414 None
415 };
416
417 let language_name = language_name.as_ref();
418 let start = buffer.point_to_buffer_offset(self.range.start);
419 let end = buffer.point_to_buffer_offset(self.range.end);
420 let (buffer, range) = if let Some((start, end)) = start.zip(end) {
421 let (start_buffer, start_buffer_offset) = start;
422 let (end_buffer, end_buffer_offset) = end;
423 if start_buffer.remote_id() == end_buffer.remote_id() {
424 (start_buffer.clone(), start_buffer_offset..end_buffer_offset)
425 } else {
426 anyhow::bail!("invalid transformation range");
427 }
428 } else {
429 anyhow::bail!("invalid transformation range");
430 };
431
432 let prompt = self
433 .builder
434 .generate_inline_transformation_prompt(user_prompt, language_name, buffer, range)
435 .context("generating content prompt")?;
436
437 let context_task = self.context_store.as_ref().map(|context_store| {
438 if let Some(project) = self.project.upgrade() {
439 let context = context_store
440 .read(cx)
441 .context()
442 .cloned()
443 .collect::<Vec<_>>();
444 load_context(context, &project, &self.prompt_store, cx)
445 } else {
446 Task::ready(ContextLoadResult::default())
447 }
448 });
449
450 let temperature = AgentSettings::temperature_for_model(model, cx);
451
452 Ok(cx.spawn(async move |_cx| {
453 let mut request_message = LanguageModelRequestMessage {
454 role: Role::User,
455 content: Vec::new(),
456 cache: false,
457 };
458
459 if let Some(context_task) = context_task {
460 context_task
461 .await
462 .loaded_context
463 .add_to_request_message(&mut request_message);
464 }
465
466 request_message.content.push(prompt.into());
467
468 LanguageModelRequest {
469 thread_id: None,
470 prompt_id: None,
471 intent: Some(CompletionIntent::InlineAssist),
472 mode: None,
473 tools: Vec::new(),
474 tool_choice: None,
475 stop: Vec::new(),
476 temperature,
477 messages: vec![request_message],
478 thinking_allowed: false,
479 }
480 }))
481 }
482
483 pub fn handle_stream(
484 &mut self,
485 model_telemetry_id: String,
486 model_provider_id: String,
487 model_api_key: Option<String>,
488 stream: impl 'static + Future<Output = Result<LanguageModelTextStream>>,
489 cx: &mut Context<Self>,
490 ) {
491 let start_time = Instant::now();
492 let snapshot = self.snapshot.clone();
493 let selected_text = snapshot
494 .text_for_range(self.range.start..self.range.end)
495 .collect::<Rope>();
496
497 let selection_start = self.range.start.to_point(&snapshot);
498
499 // Start with the indentation of the first line in the selection
500 let mut suggested_line_indent = snapshot
501 .suggested_indents(selection_start.row..=selection_start.row, cx)
502 .into_values()
503 .next()
504 .unwrap_or_else(|| snapshot.indent_size_for_line(MultiBufferRow(selection_start.row)));
505
506 // If the first line in the selection does not have indentation, check the following lines
507 if suggested_line_indent.len == 0 && suggested_line_indent.kind == IndentKind::Space {
508 for row in selection_start.row..=self.range.end.to_point(&snapshot).row {
509 let line_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
510 // Prefer tabs if a line in the selection uses tabs as indentation
511 if line_indent.kind == IndentKind::Tab {
512 suggested_line_indent.kind = IndentKind::Tab;
513 break;
514 }
515 }
516 }
517
518 let http_client = cx.http_client();
519 let telemetry = self.telemetry.clone();
520 let language_name = {
521 let multibuffer = self.buffer.read(cx);
522 let snapshot = multibuffer.snapshot(cx);
523 let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
524 ranges
525 .first()
526 .and_then(|(buffer, _, _)| buffer.language())
527 .map(|language| language.name())
528 };
529
530 self.diff = Diff::default();
531 self.status = CodegenStatus::Pending;
532 let mut edit_start = self.range.start.to_offset(&snapshot);
533 let completion = Arc::new(Mutex::new(String::new()));
534 let completion_clone = completion.clone();
535
536 self.generation = cx.spawn(async move |codegen, cx| {
537 let stream = stream.await;
538 let token_usage = stream
539 .as_ref()
540 .ok()
541 .map(|stream| stream.last_token_usage.clone());
542 let message_id = stream
543 .as_ref()
544 .ok()
545 .and_then(|stream| stream.message_id.clone());
546 let generate = async {
547 let model_telemetry_id = model_telemetry_id.clone();
548 let model_provider_id = model_provider_id.clone();
549 let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
550 let executor = cx.background_executor().clone();
551 let message_id = message_id.clone();
552 let line_based_stream_diff: Task<anyhow::Result<()>> =
553 cx.background_spawn(async move {
554 let mut response_latency = None;
555 let request_start = Instant::now();
556 let diff = async {
557 let chunks = StripInvalidSpans::new(
558 stream?.stream.map_err(|error| error.into()),
559 );
560 futures::pin_mut!(chunks);
561 let mut diff = StreamingDiff::new(selected_text.to_string());
562 let mut line_diff = LineDiff::default();
563
564 let mut new_text = String::new();
565 let mut base_indent = None;
566 let mut line_indent = None;
567 let mut first_line = true;
568
569 while let Some(chunk) = chunks.next().await {
570 if response_latency.is_none() {
571 response_latency = Some(request_start.elapsed());
572 }
573 let chunk = chunk?;
574 completion_clone.lock().push_str(&chunk);
575
576 let mut lines = chunk.split('\n').peekable();
577 while let Some(line) = lines.next() {
578 new_text.push_str(line);
579 if line_indent.is_none()
580 && let Some(non_whitespace_ch_ix) =
581 new_text.find(|ch: char| !ch.is_whitespace())
582 {
583 line_indent = Some(non_whitespace_ch_ix);
584 base_indent = base_indent.or(line_indent);
585
586 let line_indent = line_indent.unwrap();
587 let base_indent = base_indent.unwrap();
588 let indent_delta = line_indent as i32 - base_indent as i32;
589 let mut corrected_indent_len = cmp::max(
590 0,
591 suggested_line_indent.len as i32 + indent_delta,
592 )
593 as usize;
594 if first_line {
595 corrected_indent_len = corrected_indent_len
596 .saturating_sub(selection_start.column as usize);
597 }
598
599 let indent_char = suggested_line_indent.char();
600 let mut indent_buffer = [0; 4];
601 let indent_str =
602 indent_char.encode_utf8(&mut indent_buffer);
603 new_text.replace_range(
604 ..line_indent,
605 &indent_str.repeat(corrected_indent_len),
606 );
607 }
608
609 if line_indent.is_some() {
610 let char_ops = diff.push_new(&new_text);
611 line_diff.push_char_operations(&char_ops, &selected_text);
612 diff_tx
613 .send((char_ops, line_diff.line_operations()))
614 .await?;
615 new_text.clear();
616 }
617
618 if lines.peek().is_some() {
619 let char_ops = diff.push_new("\n");
620 line_diff.push_char_operations(&char_ops, &selected_text);
621 diff_tx
622 .send((char_ops, line_diff.line_operations()))
623 .await?;
624 if line_indent.is_none() {
625 // Don't write out the leading indentation in empty lines on the next line
626 // This is the case where the above if statement didn't clear the buffer
627 new_text.clear();
628 }
629 line_indent = None;
630 first_line = false;
631 }
632 }
633 }
634
635 let mut char_ops = diff.push_new(&new_text);
636 char_ops.extend(diff.finish());
637 line_diff.push_char_operations(&char_ops, &selected_text);
638 line_diff.finish(&selected_text);
639 diff_tx
640 .send((char_ops, line_diff.line_operations()))
641 .await?;
642
643 anyhow::Ok(())
644 };
645
646 let result = diff.await;
647
648 let error_message = result.as_ref().err().map(|error| error.to_string());
649 report_assistant_event(
650 AssistantEventData {
651 conversation_id: None,
652 message_id,
653 kind: AssistantKind::Inline,
654 phase: AssistantPhase::Response,
655 model: model_telemetry_id,
656 model_provider: model_provider_id,
657 response_latency,
658 error_message,
659 language_name: language_name.map(|name| name.to_proto()),
660 },
661 telemetry,
662 http_client,
663 model_api_key,
664 &executor,
665 );
666
667 result?;
668 Ok(())
669 });
670
671 while let Some((char_ops, line_ops)) = diff_rx.next().await {
672 codegen.update(cx, |codegen, cx| {
673 codegen.last_equal_ranges.clear();
674
675 let edits = char_ops
676 .into_iter()
677 .filter_map(|operation| match operation {
678 CharOperation::Insert { text } => {
679 let edit_start = snapshot.anchor_after(edit_start);
680 Some((edit_start..edit_start, text))
681 }
682 CharOperation::Delete { bytes } => {
683 let edit_end = edit_start + bytes;
684 let edit_range = snapshot.anchor_after(edit_start)
685 ..snapshot.anchor_before(edit_end);
686 edit_start = edit_end;
687 Some((edit_range, String::new()))
688 }
689 CharOperation::Keep { bytes } => {
690 let edit_end = edit_start + bytes;
691 let edit_range = snapshot.anchor_after(edit_start)
692 ..snapshot.anchor_before(edit_end);
693 edit_start = edit_end;
694 codegen.last_equal_ranges.push(edit_range);
695 None
696 }
697 })
698 .collect::<Vec<_>>();
699
700 if codegen.active {
701 codegen.apply_edits(edits.iter().cloned(), cx);
702 codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
703 }
704 codegen.edits.extend(edits);
705 codegen.line_operations = line_ops;
706 codegen.edit_position = Some(snapshot.anchor_after(edit_start));
707
708 cx.notify();
709 })?;
710 }
711
712 // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
713 // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
714 // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
715 let batch_diff_task =
716 codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
717 let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
718 line_based_stream_diff?;
719
720 anyhow::Ok(())
721 };
722
723 let result = generate.await;
724 let elapsed_time = start_time.elapsed().as_secs_f64();
725
726 codegen
727 .update(cx, |this, cx| {
728 this.message_id = message_id;
729 this.last_equal_ranges.clear();
730 if let Err(error) = result {
731 this.status = CodegenStatus::Error(error);
732 } else {
733 this.status = CodegenStatus::Done;
734 }
735 this.elapsed_time = Some(elapsed_time);
736 this.completion = Some(completion.lock().clone());
737 if let Some(usage) = token_usage {
738 let usage = usage.lock();
739 telemetry::event!(
740 "Inline Assistant Completion",
741 model = model_telemetry_id,
742 model_provider = model_provider_id,
743 input_tokens = usage.input_tokens,
744 output_tokens = usage.output_tokens,
745 )
746 }
747 cx.emit(CodegenEvent::Finished);
748 cx.notify();
749 })
750 .ok();
751 });
752 cx.notify();
753 }
754
755 pub fn stop(&mut self, cx: &mut Context<Self>) {
756 self.last_equal_ranges.clear();
757 if self.diff.is_empty() {
758 self.status = CodegenStatus::Idle;
759 } else {
760 self.status = CodegenStatus::Done;
761 }
762 self.generation = Task::ready(());
763 cx.emit(CodegenEvent::Finished);
764 cx.notify();
765 }
766
767 pub fn undo(&mut self, cx: &mut Context<Self>) {
768 self.buffer.update(cx, |buffer, cx| {
769 if let Some(transaction_id) = self.transformation_transaction_id.take() {
770 buffer.undo_transaction(transaction_id, cx);
771 buffer.refresh_preview(cx);
772 }
773 });
774 }
775
776 fn apply_edits(
777 &mut self,
778 edits: impl IntoIterator<Item = (Range<Anchor>, String)>,
779 cx: &mut Context<CodegenAlternative>,
780 ) {
781 let transaction = self.buffer.update(cx, |buffer, cx| {
782 // Avoid grouping agent edits with user edits.
783 buffer.finalize_last_transaction(cx);
784 buffer.start_transaction(cx);
785 buffer.edit(edits, None, cx);
786 buffer.end_transaction(cx)
787 });
788
789 if let Some(transaction) = transaction {
790 if let Some(first_transaction) = self.transformation_transaction_id {
791 // Group all agent edits into the first transaction.
792 self.buffer.update(cx, |buffer, cx| {
793 buffer.merge_transactions(transaction, first_transaction, cx)
794 });
795 } else {
796 self.transformation_transaction_id = Some(transaction);
797 self.buffer
798 .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
799 }
800 }
801 }
802
803 fn reapply_line_based_diff(
804 &mut self,
805 line_operations: impl IntoIterator<Item = LineOperation>,
806 cx: &mut Context<Self>,
807 ) {
808 let old_snapshot = self.snapshot.clone();
809 let old_range = self.range.to_point(&old_snapshot);
810 let new_snapshot = self.buffer.read(cx).snapshot(cx);
811 let new_range = self.range.to_point(&new_snapshot);
812
813 let mut old_row = old_range.start.row;
814 let mut new_row = new_range.start.row;
815
816 self.diff.deleted_row_ranges.clear();
817 self.diff.inserted_row_ranges.clear();
818 for operation in line_operations {
819 match operation {
820 LineOperation::Keep { lines } => {
821 old_row += lines;
822 new_row += lines;
823 }
824 LineOperation::Delete { lines } => {
825 let old_end_row = old_row + lines - 1;
826 let new_row = new_snapshot.anchor_before(Point::new(new_row, 0));
827
828 if let Some((_, last_deleted_row_range)) =
829 self.diff.deleted_row_ranges.last_mut()
830 {
831 if *last_deleted_row_range.end() + 1 == old_row {
832 *last_deleted_row_range = *last_deleted_row_range.start()..=old_end_row;
833 } else {
834 self.diff
835 .deleted_row_ranges
836 .push((new_row, old_row..=old_end_row));
837 }
838 } else {
839 self.diff
840 .deleted_row_ranges
841 .push((new_row, old_row..=old_end_row));
842 }
843
844 old_row += lines;
845 }
846 LineOperation::Insert { lines } => {
847 let new_end_row = new_row + lines - 1;
848 let start = new_snapshot.anchor_before(Point::new(new_row, 0));
849 let end = new_snapshot.anchor_before(Point::new(
850 new_end_row,
851 new_snapshot.line_len(MultiBufferRow(new_end_row)),
852 ));
853 self.diff.inserted_row_ranges.push(start..end);
854 new_row += lines;
855 }
856 }
857
858 cx.notify();
859 }
860 }
861
862 fn reapply_batch_diff(&mut self, cx: &mut Context<Self>) -> Task<()> {
863 let old_snapshot = self.snapshot.clone();
864 let old_range = self.range.to_point(&old_snapshot);
865 let new_snapshot = self.buffer.read(cx).snapshot(cx);
866 let new_range = self.range.to_point(&new_snapshot);
867
868 cx.spawn(async move |codegen, cx| {
869 let (deleted_row_ranges, inserted_row_ranges) = cx
870 .background_spawn(async move {
871 let old_text = old_snapshot
872 .text_for_range(
873 Point::new(old_range.start.row, 0)
874 ..Point::new(
875 old_range.end.row,
876 old_snapshot.line_len(MultiBufferRow(old_range.end.row)),
877 ),
878 )
879 .collect::<String>();
880 let new_text = new_snapshot
881 .text_for_range(
882 Point::new(new_range.start.row, 0)
883 ..Point::new(
884 new_range.end.row,
885 new_snapshot.line_len(MultiBufferRow(new_range.end.row)),
886 ),
887 )
888 .collect::<String>();
889
890 let old_start_row = old_range.start.row;
891 let new_start_row = new_range.start.row;
892 let mut deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)> = Vec::new();
893 let mut inserted_row_ranges = Vec::new();
894 for (old_rows, new_rows) in line_diff(&old_text, &new_text) {
895 let old_rows = old_start_row + old_rows.start..old_start_row + old_rows.end;
896 let new_rows = new_start_row + new_rows.start..new_start_row + new_rows.end;
897 if !old_rows.is_empty() {
898 deleted_row_ranges.push((
899 new_snapshot.anchor_before(Point::new(new_rows.start, 0)),
900 old_rows.start..=old_rows.end - 1,
901 ));
902 }
903 if !new_rows.is_empty() {
904 let start = new_snapshot.anchor_before(Point::new(new_rows.start, 0));
905 let new_end_row = new_rows.end - 1;
906 let end = new_snapshot.anchor_before(Point::new(
907 new_end_row,
908 new_snapshot.line_len(MultiBufferRow(new_end_row)),
909 ));
910 inserted_row_ranges.push(start..end);
911 }
912 }
913 (deleted_row_ranges, inserted_row_ranges)
914 })
915 .await;
916
917 codegen
918 .update(cx, |codegen, cx| {
919 codegen.diff.deleted_row_ranges = deleted_row_ranges;
920 codegen.diff.inserted_row_ranges = inserted_row_ranges;
921 cx.notify();
922 })
923 .ok();
924 })
925 }
926}
927
928#[derive(Copy, Clone, Debug)]
929pub enum CodegenEvent {
930 Finished,
931 Undone,
932}
933
934struct StripInvalidSpans<T> {
935 stream: T,
936 stream_done: bool,
937 buffer: String,
938 first_line: bool,
939 line_end: bool,
940 starts_with_code_block: bool,
941}
942
943impl<T> StripInvalidSpans<T>
944where
945 T: Stream<Item = Result<String>>,
946{
947 fn new(stream: T) -> Self {
948 Self {
949 stream,
950 stream_done: false,
951 buffer: String::new(),
952 first_line: true,
953 line_end: false,
954 starts_with_code_block: false,
955 }
956 }
957}
958
959impl<T> Stream for StripInvalidSpans<T>
960where
961 T: Stream<Item = Result<String>>,
962{
963 type Item = Result<String>;
964
965 fn poll_next(self: Pin<&mut Self>, cx: &mut task::Context) -> Poll<Option<Self::Item>> {
966 const CODE_BLOCK_DELIMITER: &str = "```";
967 const CURSOR_SPAN: &str = "<|CURSOR|>";
968
969 let this = unsafe { self.get_unchecked_mut() };
970 loop {
971 if !this.stream_done {
972 let mut stream = unsafe { Pin::new_unchecked(&mut this.stream) };
973 match stream.as_mut().poll_next(cx) {
974 Poll::Ready(Some(Ok(chunk))) => {
975 this.buffer.push_str(&chunk);
976 }
977 Poll::Ready(Some(Err(error))) => return Poll::Ready(Some(Err(error))),
978 Poll::Ready(None) => {
979 this.stream_done = true;
980 }
981 Poll::Pending => return Poll::Pending,
982 }
983 }
984
985 let mut chunk = String::new();
986 let mut consumed = 0;
987 if !this.buffer.is_empty() {
988 let mut lines = this.buffer.split('\n').enumerate().peekable();
989 while let Some((line_ix, line)) = lines.next() {
990 if line_ix > 0 {
991 this.first_line = false;
992 }
993
994 if this.first_line {
995 let trimmed_line = line.trim();
996 if lines.peek().is_some() {
997 if trimmed_line.starts_with(CODE_BLOCK_DELIMITER) {
998 consumed += line.len() + 1;
999 this.starts_with_code_block = true;
1000 continue;
1001 }
1002 } else if trimmed_line.is_empty()
1003 || prefixes(CODE_BLOCK_DELIMITER)
1004 .any(|prefix| trimmed_line.starts_with(prefix))
1005 {
1006 break;
1007 }
1008 }
1009
1010 let line_without_cursor = line.replace(CURSOR_SPAN, "");
1011 if lines.peek().is_some() {
1012 if this.line_end {
1013 chunk.push('\n');
1014 }
1015
1016 chunk.push_str(&line_without_cursor);
1017 this.line_end = true;
1018 consumed += line.len() + 1;
1019 } else if this.stream_done {
1020 if !this.starts_with_code_block
1021 || !line_without_cursor.trim().ends_with(CODE_BLOCK_DELIMITER)
1022 {
1023 if this.line_end {
1024 chunk.push('\n');
1025 }
1026
1027 chunk.push_str(line);
1028 }
1029
1030 consumed += line.len();
1031 } else {
1032 let trimmed_line = line.trim();
1033 if trimmed_line.is_empty()
1034 || prefixes(CURSOR_SPAN).any(|prefix| trimmed_line.ends_with(prefix))
1035 || prefixes(CODE_BLOCK_DELIMITER)
1036 .any(|prefix| trimmed_line.ends_with(prefix))
1037 {
1038 break;
1039 } else {
1040 if this.line_end {
1041 chunk.push('\n');
1042 this.line_end = false;
1043 }
1044
1045 chunk.push_str(&line_without_cursor);
1046 consumed += line.len();
1047 }
1048 }
1049 }
1050 }
1051
1052 this.buffer = this.buffer.split_off(consumed);
1053 if !chunk.is_empty() {
1054 return Poll::Ready(Some(Ok(chunk)));
1055 } else if this.stream_done {
1056 return Poll::Ready(None);
1057 }
1058 }
1059 }
1060}
1061
1062fn prefixes(text: &str) -> impl Iterator<Item = &str> {
1063 (0..text.len() - 1).map(|ix| &text[..ix + 1])
1064}
1065
1066#[derive(Default)]
1067pub struct Diff {
1068 pub deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)>,
1069 pub inserted_row_ranges: Vec<Range<Anchor>>,
1070}
1071
1072impl Diff {
1073 fn is_empty(&self) -> bool {
1074 self.deleted_row_ranges.is_empty() && self.inserted_row_ranges.is_empty()
1075 }
1076}
1077
1078#[cfg(test)]
1079mod tests {
1080 use super::*;
1081 use fs::FakeFs;
1082 use futures::{
1083 Stream,
1084 stream::{self},
1085 };
1086 use gpui::TestAppContext;
1087 use indoc::indoc;
1088 use language::{
1089 Buffer, Language, LanguageConfig, LanguageMatcher, Point, language_settings,
1090 tree_sitter_rust,
1091 };
1092 use language_model::{LanguageModelRegistry, TokenUsage};
1093 use rand::prelude::*;
1094 use settings::SettingsStore;
1095 use std::{future, sync::Arc};
1096
1097 #[gpui::test(iterations = 10)]
1098 async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
1099 init_test(cx);
1100
1101 let text = indoc! {"
1102 fn main() {
1103 let x = 0;
1104 for _ in 0..10 {
1105 x += 1;
1106 }
1107 }
1108 "};
1109 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1110 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1111 let range = buffer.read_with(cx, |buffer, cx| {
1112 let snapshot = buffer.snapshot(cx);
1113 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
1114 });
1115 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1116 let fs = FakeFs::new(cx.executor());
1117 let project = Project::test(fs, vec![], cx).await;
1118 let codegen = cx.new(|cx| {
1119 CodegenAlternative::new(
1120 buffer.clone(),
1121 range.clone(),
1122 true,
1123 None,
1124 project.downgrade(),
1125 None,
1126 None,
1127 prompt_builder,
1128 cx,
1129 )
1130 });
1131
1132 let chunks_tx = simulate_response_stream(&codegen, cx);
1133
1134 let mut new_text = concat!(
1135 " let mut x = 0;\n",
1136 " while x < 10 {\n",
1137 " x += 1;\n",
1138 " }",
1139 );
1140 while !new_text.is_empty() {
1141 let max_len = cmp::min(new_text.len(), 10);
1142 let len = rng.random_range(1..=max_len);
1143 let (chunk, suffix) = new_text.split_at(len);
1144 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1145 new_text = suffix;
1146 cx.background_executor.run_until_parked();
1147 }
1148 drop(chunks_tx);
1149 cx.background_executor.run_until_parked();
1150
1151 assert_eq!(
1152 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1153 indoc! {"
1154 fn main() {
1155 let mut x = 0;
1156 while x < 10 {
1157 x += 1;
1158 }
1159 }
1160 "}
1161 );
1162 }
1163
1164 #[gpui::test(iterations = 10)]
1165 async fn test_autoindent_when_generating_past_indentation(
1166 cx: &mut TestAppContext,
1167 mut rng: StdRng,
1168 ) {
1169 init_test(cx);
1170
1171 let text = indoc! {"
1172 fn main() {
1173 le
1174 }
1175 "};
1176 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1177 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1178 let range = buffer.read_with(cx, |buffer, cx| {
1179 let snapshot = buffer.snapshot(cx);
1180 snapshot.anchor_before(Point::new(1, 6))..snapshot.anchor_after(Point::new(1, 6))
1181 });
1182 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1183 let fs = FakeFs::new(cx.executor());
1184 let project = Project::test(fs, vec![], cx).await;
1185 let codegen = cx.new(|cx| {
1186 CodegenAlternative::new(
1187 buffer.clone(),
1188 range.clone(),
1189 true,
1190 None,
1191 project.downgrade(),
1192 None,
1193 None,
1194 prompt_builder,
1195 cx,
1196 )
1197 });
1198
1199 let chunks_tx = simulate_response_stream(&codegen, cx);
1200
1201 cx.background_executor.run_until_parked();
1202
1203 let mut new_text = concat!(
1204 "t mut x = 0;\n",
1205 "while x < 10 {\n",
1206 " x += 1;\n",
1207 "}", //
1208 );
1209 while !new_text.is_empty() {
1210 let max_len = cmp::min(new_text.len(), 10);
1211 let len = rng.random_range(1..=max_len);
1212 let (chunk, suffix) = new_text.split_at(len);
1213 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1214 new_text = suffix;
1215 cx.background_executor.run_until_parked();
1216 }
1217 drop(chunks_tx);
1218 cx.background_executor.run_until_parked();
1219
1220 assert_eq!(
1221 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1222 indoc! {"
1223 fn main() {
1224 let mut x = 0;
1225 while x < 10 {
1226 x += 1;
1227 }
1228 }
1229 "}
1230 );
1231 }
1232
1233 #[gpui::test(iterations = 10)]
1234 async fn test_autoindent_when_generating_before_indentation(
1235 cx: &mut TestAppContext,
1236 mut rng: StdRng,
1237 ) {
1238 init_test(cx);
1239
1240 let text = concat!(
1241 "fn main() {\n",
1242 " \n",
1243 "}\n" //
1244 );
1245 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1246 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1247 let range = buffer.read_with(cx, |buffer, cx| {
1248 let snapshot = buffer.snapshot(cx);
1249 snapshot.anchor_before(Point::new(1, 2))..snapshot.anchor_after(Point::new(1, 2))
1250 });
1251 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1252 let fs = FakeFs::new(cx.executor());
1253 let project = Project::test(fs, vec![], cx).await;
1254 let codegen = cx.new(|cx| {
1255 CodegenAlternative::new(
1256 buffer.clone(),
1257 range.clone(),
1258 true,
1259 None,
1260 project.downgrade(),
1261 None,
1262 None,
1263 prompt_builder,
1264 cx,
1265 )
1266 });
1267
1268 let chunks_tx = simulate_response_stream(&codegen, cx);
1269
1270 cx.background_executor.run_until_parked();
1271
1272 let mut new_text = concat!(
1273 "let mut x = 0;\n",
1274 "while x < 10 {\n",
1275 " x += 1;\n",
1276 "}", //
1277 );
1278 while !new_text.is_empty() {
1279 let max_len = cmp::min(new_text.len(), 10);
1280 let len = rng.random_range(1..=max_len);
1281 let (chunk, suffix) = new_text.split_at(len);
1282 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1283 new_text = suffix;
1284 cx.background_executor.run_until_parked();
1285 }
1286 drop(chunks_tx);
1287 cx.background_executor.run_until_parked();
1288
1289 assert_eq!(
1290 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1291 indoc! {"
1292 fn main() {
1293 let mut x = 0;
1294 while x < 10 {
1295 x += 1;
1296 }
1297 }
1298 "}
1299 );
1300 }
1301
1302 #[gpui::test(iterations = 10)]
1303 async fn test_autoindent_respects_tabs_in_selection(cx: &mut TestAppContext) {
1304 init_test(cx);
1305
1306 let text = indoc! {"
1307 func main() {
1308 \tx := 0
1309 \tfor i := 0; i < 10; i++ {
1310 \t\tx++
1311 \t}
1312 }
1313 "};
1314 let buffer = cx.new(|cx| Buffer::local(text, cx));
1315 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1316 let range = buffer.read_with(cx, |buffer, cx| {
1317 let snapshot = buffer.snapshot(cx);
1318 snapshot.anchor_before(Point::new(0, 0))..snapshot.anchor_after(Point::new(4, 2))
1319 });
1320 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1321 let fs = FakeFs::new(cx.executor());
1322 let project = Project::test(fs, vec![], cx).await;
1323 let codegen = cx.new(|cx| {
1324 CodegenAlternative::new(
1325 buffer.clone(),
1326 range.clone(),
1327 true,
1328 None,
1329 project.downgrade(),
1330 None,
1331 None,
1332 prompt_builder,
1333 cx,
1334 )
1335 });
1336
1337 let chunks_tx = simulate_response_stream(&codegen, cx);
1338 let new_text = concat!(
1339 "func main() {\n",
1340 "\tx := 0\n",
1341 "\tfor x < 10 {\n",
1342 "\t\tx++\n",
1343 "\t}", //
1344 );
1345 chunks_tx.unbounded_send(new_text.to_string()).unwrap();
1346 drop(chunks_tx);
1347 cx.background_executor.run_until_parked();
1348
1349 assert_eq!(
1350 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1351 indoc! {"
1352 func main() {
1353 \tx := 0
1354 \tfor x < 10 {
1355 \t\tx++
1356 \t}
1357 }
1358 "}
1359 );
1360 }
1361
1362 #[gpui::test]
1363 async fn test_inactive_codegen_alternative(cx: &mut TestAppContext) {
1364 init_test(cx);
1365
1366 let text = indoc! {"
1367 fn main() {
1368 let x = 0;
1369 }
1370 "};
1371 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1372 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1373 let range = buffer.read_with(cx, |buffer, cx| {
1374 let snapshot = buffer.snapshot(cx);
1375 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(1, 14))
1376 });
1377 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1378 let fs = FakeFs::new(cx.executor());
1379 let project = Project::test(fs, vec![], cx).await;
1380 let codegen = cx.new(|cx| {
1381 CodegenAlternative::new(
1382 buffer.clone(),
1383 range.clone(),
1384 false,
1385 None,
1386 project.downgrade(),
1387 None,
1388 None,
1389 prompt_builder,
1390 cx,
1391 )
1392 });
1393
1394 let chunks_tx = simulate_response_stream(&codegen, cx);
1395 chunks_tx
1396 .unbounded_send("let mut x = 0;\nx += 1;".to_string())
1397 .unwrap();
1398 drop(chunks_tx);
1399 cx.run_until_parked();
1400
1401 // The codegen is inactive, so the buffer doesn't get modified.
1402 assert_eq!(
1403 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1404 text
1405 );
1406
1407 // Activating the codegen applies the changes.
1408 codegen.update(cx, |codegen, cx| codegen.set_active(true, cx));
1409 assert_eq!(
1410 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1411 indoc! {"
1412 fn main() {
1413 let mut x = 0;
1414 x += 1;
1415 }
1416 "}
1417 );
1418
1419 // Deactivating the codegen undoes the changes.
1420 codegen.update(cx, |codegen, cx| codegen.set_active(false, cx));
1421 cx.run_until_parked();
1422 assert_eq!(
1423 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1424 text
1425 );
1426 }
1427
1428 #[gpui::test]
1429 async fn test_strip_invalid_spans_from_codeblock() {
1430 assert_chunks("Lorem ipsum dolor", "Lorem ipsum dolor").await;
1431 assert_chunks("```\nLorem ipsum dolor", "Lorem ipsum dolor").await;
1432 assert_chunks("```\nLorem ipsum dolor\n```", "Lorem ipsum dolor").await;
1433 assert_chunks(
1434 "```html\n```js\nLorem ipsum dolor\n```\n```",
1435 "```js\nLorem ipsum dolor\n```",
1436 )
1437 .await;
1438 assert_chunks("``\nLorem ipsum dolor\n```", "``\nLorem ipsum dolor\n```").await;
1439 assert_chunks("Lorem<|CURSOR|> ipsum", "Lorem ipsum").await;
1440 assert_chunks("Lorem ipsum", "Lorem ipsum").await;
1441 assert_chunks("```\n<|CURSOR|>Lorem ipsum\n```", "Lorem ipsum").await;
1442
1443 async fn assert_chunks(text: &str, expected_text: &str) {
1444 for chunk_size in 1..=text.len() {
1445 let actual_text = StripInvalidSpans::new(chunks(text, chunk_size))
1446 .map(|chunk| chunk.unwrap())
1447 .collect::<String>()
1448 .await;
1449 assert_eq!(
1450 actual_text, expected_text,
1451 "failed to strip invalid spans, chunk size: {}",
1452 chunk_size
1453 );
1454 }
1455 }
1456
1457 fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
1458 stream::iter(
1459 text.chars()
1460 .collect::<Vec<_>>()
1461 .chunks(size)
1462 .map(|chunk| Ok(chunk.iter().collect::<String>()))
1463 .collect::<Vec<_>>(),
1464 )
1465 }
1466 }
1467
1468 fn init_test(cx: &mut TestAppContext) {
1469 cx.update(LanguageModelRegistry::test);
1470 cx.set_global(cx.update(SettingsStore::test));
1471 cx.update(Project::init_settings);
1472 cx.update(language_settings::init);
1473 }
1474
1475 fn simulate_response_stream(
1476 codegen: &Entity<CodegenAlternative>,
1477 cx: &mut TestAppContext,
1478 ) -> mpsc::UnboundedSender<String> {
1479 let (chunks_tx, chunks_rx) = mpsc::unbounded();
1480 codegen.update(cx, |codegen, cx| {
1481 codegen.handle_stream(
1482 String::new(),
1483 String::new(),
1484 None,
1485 future::ready(Ok(LanguageModelTextStream {
1486 message_id: None,
1487 stream: chunks_rx.map(Ok).boxed(),
1488 last_token_usage: Arc::new(Mutex::new(TokenUsage::default())),
1489 })),
1490 cx,
1491 );
1492 });
1493 chunks_tx
1494 }
1495
1496 fn rust_lang() -> Language {
1497 Language::new(
1498 LanguageConfig {
1499 name: "Rust".into(),
1500 matcher: LanguageMatcher {
1501 path_suffixes: vec!["rs".to_string()],
1502 ..Default::default()
1503 },
1504 ..Default::default()
1505 },
1506 Some(tree_sitter_rust::LANGUAGE.into()),
1507 )
1508 .with_indents_query(
1509 r#"
1510 (call_expression) @indent
1511 (field_expression) @indent
1512 (_ "(" ")" @end) @indent
1513 (_ "{" "}" @end) @indent
1514 "#,
1515 )
1516 .unwrap()
1517 }
1518}