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 if self.transformation_transaction_id == Some(*transaction_id) {
357 self.transformation_transaction_id = None;
358 self.generation = Task::ready(());
359 cx.emit(CodegenEvent::Undone);
360 }
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 if 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 =
589 line_indent as i32 - base_indent as i32;
590 let mut corrected_indent_len = cmp::max(
591 0,
592 suggested_line_indent.len as i32 + indent_delta,
593 )
594 as usize;
595 if first_line {
596 corrected_indent_len = corrected_indent_len
597 .saturating_sub(
598 selection_start.column as usize,
599 );
600 }
601
602 let indent_char = suggested_line_indent.char();
603 let mut indent_buffer = [0; 4];
604 let indent_str =
605 indent_char.encode_utf8(&mut indent_buffer);
606 new_text.replace_range(
607 ..line_indent,
608 &indent_str.repeat(corrected_indent_len),
609 );
610 }
611 }
612
613 if line_indent.is_some() {
614 let char_ops = diff.push_new(&new_text);
615 line_diff.push_char_operations(&char_ops, &selected_text);
616 diff_tx
617 .send((char_ops, line_diff.line_operations()))
618 .await?;
619 new_text.clear();
620 }
621
622 if lines.peek().is_some() {
623 let char_ops = diff.push_new("\n");
624 line_diff.push_char_operations(&char_ops, &selected_text);
625 diff_tx
626 .send((char_ops, line_diff.line_operations()))
627 .await?;
628 if line_indent.is_none() {
629 // Don't write out the leading indentation in empty lines on the next line
630 // This is the case where the above if statement didn't clear the buffer
631 new_text.clear();
632 }
633 line_indent = None;
634 first_line = false;
635 }
636 }
637 }
638
639 let mut char_ops = diff.push_new(&new_text);
640 char_ops.extend(diff.finish());
641 line_diff.push_char_operations(&char_ops, &selected_text);
642 line_diff.finish(&selected_text);
643 diff_tx
644 .send((char_ops, line_diff.line_operations()))
645 .await?;
646
647 anyhow::Ok(())
648 };
649
650 let result = diff.await;
651
652 let error_message = result.as_ref().err().map(|error| error.to_string());
653 report_assistant_event(
654 AssistantEventData {
655 conversation_id: None,
656 message_id,
657 kind: AssistantKind::Inline,
658 phase: AssistantPhase::Response,
659 model: model_telemetry_id,
660 model_provider: model_provider_id,
661 response_latency,
662 error_message,
663 language_name: language_name.map(|name| name.to_proto()),
664 },
665 telemetry,
666 http_client,
667 model_api_key,
668 &executor,
669 );
670
671 result?;
672 Ok(())
673 });
674
675 while let Some((char_ops, line_ops)) = diff_rx.next().await {
676 codegen.update(cx, |codegen, cx| {
677 codegen.last_equal_ranges.clear();
678
679 let edits = char_ops
680 .into_iter()
681 .filter_map(|operation| match operation {
682 CharOperation::Insert { text } => {
683 let edit_start = snapshot.anchor_after(edit_start);
684 Some((edit_start..edit_start, text))
685 }
686 CharOperation::Delete { bytes } => {
687 let edit_end = edit_start + bytes;
688 let edit_range = snapshot.anchor_after(edit_start)
689 ..snapshot.anchor_before(edit_end);
690 edit_start = edit_end;
691 Some((edit_range, String::new()))
692 }
693 CharOperation::Keep { bytes } => {
694 let edit_end = edit_start + bytes;
695 let edit_range = snapshot.anchor_after(edit_start)
696 ..snapshot.anchor_before(edit_end);
697 edit_start = edit_end;
698 codegen.last_equal_ranges.push(edit_range);
699 None
700 }
701 })
702 .collect::<Vec<_>>();
703
704 if codegen.active {
705 codegen.apply_edits(edits.iter().cloned(), cx);
706 codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
707 }
708 codegen.edits.extend(edits);
709 codegen.line_operations = line_ops;
710 codegen.edit_position = Some(snapshot.anchor_after(edit_start));
711
712 cx.notify();
713 })?;
714 }
715
716 // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
717 // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
718 // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
719 let batch_diff_task =
720 codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
721 let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
722 line_based_stream_diff?;
723
724 anyhow::Ok(())
725 };
726
727 let result = generate.await;
728 let elapsed_time = start_time.elapsed().as_secs_f64();
729
730 codegen
731 .update(cx, |this, cx| {
732 this.message_id = message_id;
733 this.last_equal_ranges.clear();
734 if let Err(error) = result {
735 this.status = CodegenStatus::Error(error);
736 } else {
737 this.status = CodegenStatus::Done;
738 }
739 this.elapsed_time = Some(elapsed_time);
740 this.completion = Some(completion.lock().clone());
741 if let Some(usage) = token_usage {
742 let usage = usage.lock();
743 telemetry::event!(
744 "Inline Assistant Completion",
745 model = model_telemetry_id,
746 model_provider = model_provider_id,
747 input_tokens = usage.input_tokens,
748 output_tokens = usage.output_tokens,
749 )
750 }
751 cx.emit(CodegenEvent::Finished);
752 cx.notify();
753 })
754 .ok();
755 });
756 cx.notify();
757 }
758
759 pub fn stop(&mut self, cx: &mut Context<Self>) {
760 self.last_equal_ranges.clear();
761 if self.diff.is_empty() {
762 self.status = CodegenStatus::Idle;
763 } else {
764 self.status = CodegenStatus::Done;
765 }
766 self.generation = Task::ready(());
767 cx.emit(CodegenEvent::Finished);
768 cx.notify();
769 }
770
771 pub fn undo(&mut self, cx: &mut Context<Self>) {
772 self.buffer.update(cx, |buffer, cx| {
773 if let Some(transaction_id) = self.transformation_transaction_id.take() {
774 buffer.undo_transaction(transaction_id, cx);
775 buffer.refresh_preview(cx);
776 }
777 });
778 }
779
780 fn apply_edits(
781 &mut self,
782 edits: impl IntoIterator<Item = (Range<Anchor>, String)>,
783 cx: &mut Context<CodegenAlternative>,
784 ) {
785 let transaction = self.buffer.update(cx, |buffer, cx| {
786 // Avoid grouping agent edits with user edits.
787 buffer.finalize_last_transaction(cx);
788 buffer.start_transaction(cx);
789 buffer.edit(edits, None, cx);
790 buffer.end_transaction(cx)
791 });
792
793 if let Some(transaction) = transaction {
794 if let Some(first_transaction) = self.transformation_transaction_id {
795 // Group all agent edits into the first transaction.
796 self.buffer.update(cx, |buffer, cx| {
797 buffer.merge_transactions(transaction, first_transaction, cx)
798 });
799 } else {
800 self.transformation_transaction_id = Some(transaction);
801 self.buffer
802 .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
803 }
804 }
805 }
806
807 fn reapply_line_based_diff(
808 &mut self,
809 line_operations: impl IntoIterator<Item = LineOperation>,
810 cx: &mut Context<Self>,
811 ) {
812 let old_snapshot = self.snapshot.clone();
813 let old_range = self.range.to_point(&old_snapshot);
814 let new_snapshot = self.buffer.read(cx).snapshot(cx);
815 let new_range = self.range.to_point(&new_snapshot);
816
817 let mut old_row = old_range.start.row;
818 let mut new_row = new_range.start.row;
819
820 self.diff.deleted_row_ranges.clear();
821 self.diff.inserted_row_ranges.clear();
822 for operation in line_operations {
823 match operation {
824 LineOperation::Keep { lines } => {
825 old_row += lines;
826 new_row += lines;
827 }
828 LineOperation::Delete { lines } => {
829 let old_end_row = old_row + lines - 1;
830 let new_row = new_snapshot.anchor_before(Point::new(new_row, 0));
831
832 if let Some((_, last_deleted_row_range)) =
833 self.diff.deleted_row_ranges.last_mut()
834 {
835 if *last_deleted_row_range.end() + 1 == old_row {
836 *last_deleted_row_range = *last_deleted_row_range.start()..=old_end_row;
837 } else {
838 self.diff
839 .deleted_row_ranges
840 .push((new_row, old_row..=old_end_row));
841 }
842 } else {
843 self.diff
844 .deleted_row_ranges
845 .push((new_row, old_row..=old_end_row));
846 }
847
848 old_row += lines;
849 }
850 LineOperation::Insert { lines } => {
851 let new_end_row = new_row + lines - 1;
852 let start = new_snapshot.anchor_before(Point::new(new_row, 0));
853 let end = new_snapshot.anchor_before(Point::new(
854 new_end_row,
855 new_snapshot.line_len(MultiBufferRow(new_end_row)),
856 ));
857 self.diff.inserted_row_ranges.push(start..end);
858 new_row += lines;
859 }
860 }
861
862 cx.notify();
863 }
864 }
865
866 fn reapply_batch_diff(&mut self, cx: &mut Context<Self>) -> Task<()> {
867 let old_snapshot = self.snapshot.clone();
868 let old_range = self.range.to_point(&old_snapshot);
869 let new_snapshot = self.buffer.read(cx).snapshot(cx);
870 let new_range = self.range.to_point(&new_snapshot);
871
872 cx.spawn(async move |codegen, cx| {
873 let (deleted_row_ranges, inserted_row_ranges) = cx
874 .background_spawn(async move {
875 let old_text = old_snapshot
876 .text_for_range(
877 Point::new(old_range.start.row, 0)
878 ..Point::new(
879 old_range.end.row,
880 old_snapshot.line_len(MultiBufferRow(old_range.end.row)),
881 ),
882 )
883 .collect::<String>();
884 let new_text = new_snapshot
885 .text_for_range(
886 Point::new(new_range.start.row, 0)
887 ..Point::new(
888 new_range.end.row,
889 new_snapshot.line_len(MultiBufferRow(new_range.end.row)),
890 ),
891 )
892 .collect::<String>();
893
894 let old_start_row = old_range.start.row;
895 let new_start_row = new_range.start.row;
896 let mut deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)> = Vec::new();
897 let mut inserted_row_ranges = Vec::new();
898 for (old_rows, new_rows) in line_diff(&old_text, &new_text) {
899 let old_rows = old_start_row + old_rows.start..old_start_row + old_rows.end;
900 let new_rows = new_start_row + new_rows.start..new_start_row + new_rows.end;
901 if !old_rows.is_empty() {
902 deleted_row_ranges.push((
903 new_snapshot.anchor_before(Point::new(new_rows.start, 0)),
904 old_rows.start..=old_rows.end - 1,
905 ));
906 }
907 if !new_rows.is_empty() {
908 let start = new_snapshot.anchor_before(Point::new(new_rows.start, 0));
909 let new_end_row = new_rows.end - 1;
910 let end = new_snapshot.anchor_before(Point::new(
911 new_end_row,
912 new_snapshot.line_len(MultiBufferRow(new_end_row)),
913 ));
914 inserted_row_ranges.push(start..end);
915 }
916 }
917 (deleted_row_ranges, inserted_row_ranges)
918 })
919 .await;
920
921 codegen
922 .update(cx, |codegen, cx| {
923 codegen.diff.deleted_row_ranges = deleted_row_ranges;
924 codegen.diff.inserted_row_ranges = inserted_row_ranges;
925 cx.notify();
926 })
927 .ok();
928 })
929 }
930}
931
932#[derive(Copy, Clone, Debug)]
933pub enum CodegenEvent {
934 Finished,
935 Undone,
936}
937
938struct StripInvalidSpans<T> {
939 stream: T,
940 stream_done: bool,
941 buffer: String,
942 first_line: bool,
943 line_end: bool,
944 starts_with_code_block: bool,
945}
946
947impl<T> StripInvalidSpans<T>
948where
949 T: Stream<Item = Result<String>>,
950{
951 fn new(stream: T) -> Self {
952 Self {
953 stream,
954 stream_done: false,
955 buffer: String::new(),
956 first_line: true,
957 line_end: false,
958 starts_with_code_block: false,
959 }
960 }
961}
962
963impl<T> Stream for StripInvalidSpans<T>
964where
965 T: Stream<Item = Result<String>>,
966{
967 type Item = Result<String>;
968
969 fn poll_next(self: Pin<&mut Self>, cx: &mut task::Context) -> Poll<Option<Self::Item>> {
970 const CODE_BLOCK_DELIMITER: &str = "```";
971 const CURSOR_SPAN: &str = "<|CURSOR|>";
972
973 let this = unsafe { self.get_unchecked_mut() };
974 loop {
975 if !this.stream_done {
976 let mut stream = unsafe { Pin::new_unchecked(&mut this.stream) };
977 match stream.as_mut().poll_next(cx) {
978 Poll::Ready(Some(Ok(chunk))) => {
979 this.buffer.push_str(&chunk);
980 }
981 Poll::Ready(Some(Err(error))) => return Poll::Ready(Some(Err(error))),
982 Poll::Ready(None) => {
983 this.stream_done = true;
984 }
985 Poll::Pending => return Poll::Pending,
986 }
987 }
988
989 let mut chunk = String::new();
990 let mut consumed = 0;
991 if !this.buffer.is_empty() {
992 let mut lines = this.buffer.split('\n').enumerate().peekable();
993 while let Some((line_ix, line)) = lines.next() {
994 if line_ix > 0 {
995 this.first_line = false;
996 }
997
998 if this.first_line {
999 let trimmed_line = line.trim();
1000 if lines.peek().is_some() {
1001 if trimmed_line.starts_with(CODE_BLOCK_DELIMITER) {
1002 consumed += line.len() + 1;
1003 this.starts_with_code_block = true;
1004 continue;
1005 }
1006 } else if trimmed_line.is_empty()
1007 || prefixes(CODE_BLOCK_DELIMITER)
1008 .any(|prefix| trimmed_line.starts_with(prefix))
1009 {
1010 break;
1011 }
1012 }
1013
1014 let line_without_cursor = line.replace(CURSOR_SPAN, "");
1015 if lines.peek().is_some() {
1016 if this.line_end {
1017 chunk.push('\n');
1018 }
1019
1020 chunk.push_str(&line_without_cursor);
1021 this.line_end = true;
1022 consumed += line.len() + 1;
1023 } else if this.stream_done {
1024 if !this.starts_with_code_block
1025 || !line_without_cursor.trim().ends_with(CODE_BLOCK_DELIMITER)
1026 {
1027 if this.line_end {
1028 chunk.push('\n');
1029 }
1030
1031 chunk.push_str(&line);
1032 }
1033
1034 consumed += line.len();
1035 } else {
1036 let trimmed_line = line.trim();
1037 if trimmed_line.is_empty()
1038 || prefixes(CURSOR_SPAN).any(|prefix| trimmed_line.ends_with(prefix))
1039 || prefixes(CODE_BLOCK_DELIMITER)
1040 .any(|prefix| trimmed_line.ends_with(prefix))
1041 {
1042 break;
1043 } else {
1044 if this.line_end {
1045 chunk.push('\n');
1046 this.line_end = false;
1047 }
1048
1049 chunk.push_str(&line_without_cursor);
1050 consumed += line.len();
1051 }
1052 }
1053 }
1054 }
1055
1056 this.buffer = this.buffer.split_off(consumed);
1057 if !chunk.is_empty() {
1058 return Poll::Ready(Some(Ok(chunk)));
1059 } else if this.stream_done {
1060 return Poll::Ready(None);
1061 }
1062 }
1063 }
1064}
1065
1066fn prefixes(text: &str) -> impl Iterator<Item = &str> {
1067 (0..text.len() - 1).map(|ix| &text[..ix + 1])
1068}
1069
1070#[derive(Default)]
1071pub struct Diff {
1072 pub deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)>,
1073 pub inserted_row_ranges: Vec<Range<Anchor>>,
1074}
1075
1076impl Diff {
1077 fn is_empty(&self) -> bool {
1078 self.deleted_row_ranges.is_empty() && self.inserted_row_ranges.is_empty()
1079 }
1080}
1081
1082#[cfg(test)]
1083mod tests {
1084 use super::*;
1085 use fs::FakeFs;
1086 use futures::{
1087 Stream,
1088 stream::{self},
1089 };
1090 use gpui::TestAppContext;
1091 use indoc::indoc;
1092 use language::{
1093 Buffer, Language, LanguageConfig, LanguageMatcher, Point, language_settings,
1094 tree_sitter_rust,
1095 };
1096 use language_model::{LanguageModelRegistry, TokenUsage};
1097 use rand::prelude::*;
1098 use settings::SettingsStore;
1099 use std::{future, sync::Arc};
1100
1101 #[gpui::test(iterations = 10)]
1102 async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
1103 init_test(cx);
1104
1105 let text = indoc! {"
1106 fn main() {
1107 let x = 0;
1108 for _ in 0..10 {
1109 x += 1;
1110 }
1111 }
1112 "};
1113 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1114 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1115 let range = buffer.read_with(cx, |buffer, cx| {
1116 let snapshot = buffer.snapshot(cx);
1117 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
1118 });
1119 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1120 let fs = FakeFs::new(cx.executor());
1121 let project = Project::test(fs, vec![], cx).await;
1122 let codegen = cx.new(|cx| {
1123 CodegenAlternative::new(
1124 buffer.clone(),
1125 range.clone(),
1126 true,
1127 None,
1128 project.downgrade(),
1129 None,
1130 None,
1131 prompt_builder,
1132 cx,
1133 )
1134 });
1135
1136 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1137
1138 let mut new_text = concat!(
1139 " let mut x = 0;\n",
1140 " while x < 10 {\n",
1141 " x += 1;\n",
1142 " }",
1143 );
1144 while !new_text.is_empty() {
1145 let max_len = cmp::min(new_text.len(), 10);
1146 let len = rng.gen_range(1..=max_len);
1147 let (chunk, suffix) = new_text.split_at(len);
1148 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1149 new_text = suffix;
1150 cx.background_executor.run_until_parked();
1151 }
1152 drop(chunks_tx);
1153 cx.background_executor.run_until_parked();
1154
1155 assert_eq!(
1156 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1157 indoc! {"
1158 fn main() {
1159 let mut x = 0;
1160 while x < 10 {
1161 x += 1;
1162 }
1163 }
1164 "}
1165 );
1166 }
1167
1168 #[gpui::test(iterations = 10)]
1169 async fn test_autoindent_when_generating_past_indentation(
1170 cx: &mut TestAppContext,
1171 mut rng: StdRng,
1172 ) {
1173 init_test(cx);
1174
1175 let text = indoc! {"
1176 fn main() {
1177 le
1178 }
1179 "};
1180 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1181 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1182 let range = buffer.read_with(cx, |buffer, cx| {
1183 let snapshot = buffer.snapshot(cx);
1184 snapshot.anchor_before(Point::new(1, 6))..snapshot.anchor_after(Point::new(1, 6))
1185 });
1186 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1187 let fs = FakeFs::new(cx.executor());
1188 let project = Project::test(fs, vec![], cx).await;
1189 let codegen = cx.new(|cx| {
1190 CodegenAlternative::new(
1191 buffer.clone(),
1192 range.clone(),
1193 true,
1194 None,
1195 project.downgrade(),
1196 None,
1197 None,
1198 prompt_builder,
1199 cx,
1200 )
1201 });
1202
1203 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1204
1205 cx.background_executor.run_until_parked();
1206
1207 let mut new_text = concat!(
1208 "t mut x = 0;\n",
1209 "while x < 10 {\n",
1210 " x += 1;\n",
1211 "}", //
1212 );
1213 while !new_text.is_empty() {
1214 let max_len = cmp::min(new_text.len(), 10);
1215 let len = rng.gen_range(1..=max_len);
1216 let (chunk, suffix) = new_text.split_at(len);
1217 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1218 new_text = suffix;
1219 cx.background_executor.run_until_parked();
1220 }
1221 drop(chunks_tx);
1222 cx.background_executor.run_until_parked();
1223
1224 assert_eq!(
1225 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1226 indoc! {"
1227 fn main() {
1228 let mut x = 0;
1229 while x < 10 {
1230 x += 1;
1231 }
1232 }
1233 "}
1234 );
1235 }
1236
1237 #[gpui::test(iterations = 10)]
1238 async fn test_autoindent_when_generating_before_indentation(
1239 cx: &mut TestAppContext,
1240 mut rng: StdRng,
1241 ) {
1242 init_test(cx);
1243
1244 let text = concat!(
1245 "fn main() {\n",
1246 " \n",
1247 "}\n" //
1248 );
1249 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1250 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1251 let range = buffer.read_with(cx, |buffer, cx| {
1252 let snapshot = buffer.snapshot(cx);
1253 snapshot.anchor_before(Point::new(1, 2))..snapshot.anchor_after(Point::new(1, 2))
1254 });
1255 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1256 let fs = FakeFs::new(cx.executor());
1257 let project = Project::test(fs, vec![], cx).await;
1258 let codegen = cx.new(|cx| {
1259 CodegenAlternative::new(
1260 buffer.clone(),
1261 range.clone(),
1262 true,
1263 None,
1264 project.downgrade(),
1265 None,
1266 None,
1267 prompt_builder,
1268 cx,
1269 )
1270 });
1271
1272 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1273
1274 cx.background_executor.run_until_parked();
1275
1276 let mut new_text = concat!(
1277 "let mut x = 0;\n",
1278 "while x < 10 {\n",
1279 " x += 1;\n",
1280 "}", //
1281 );
1282 while !new_text.is_empty() {
1283 let max_len = cmp::min(new_text.len(), 10);
1284 let len = rng.gen_range(1..=max_len);
1285 let (chunk, suffix) = new_text.split_at(len);
1286 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1287 new_text = suffix;
1288 cx.background_executor.run_until_parked();
1289 }
1290 drop(chunks_tx);
1291 cx.background_executor.run_until_parked();
1292
1293 assert_eq!(
1294 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1295 indoc! {"
1296 fn main() {
1297 let mut x = 0;
1298 while x < 10 {
1299 x += 1;
1300 }
1301 }
1302 "}
1303 );
1304 }
1305
1306 #[gpui::test(iterations = 10)]
1307 async fn test_autoindent_respects_tabs_in_selection(cx: &mut TestAppContext) {
1308 init_test(cx);
1309
1310 let text = indoc! {"
1311 func main() {
1312 \tx := 0
1313 \tfor i := 0; i < 10; i++ {
1314 \t\tx++
1315 \t}
1316 }
1317 "};
1318 let buffer = cx.new(|cx| Buffer::local(text, cx));
1319 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1320 let range = buffer.read_with(cx, |buffer, cx| {
1321 let snapshot = buffer.snapshot(cx);
1322 snapshot.anchor_before(Point::new(0, 0))..snapshot.anchor_after(Point::new(4, 2))
1323 });
1324 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1325 let fs = FakeFs::new(cx.executor());
1326 let project = Project::test(fs, vec![], cx).await;
1327 let codegen = cx.new(|cx| {
1328 CodegenAlternative::new(
1329 buffer.clone(),
1330 range.clone(),
1331 true,
1332 None,
1333 project.downgrade(),
1334 None,
1335 None,
1336 prompt_builder,
1337 cx,
1338 )
1339 });
1340
1341 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1342 let new_text = concat!(
1343 "func main() {\n",
1344 "\tx := 0\n",
1345 "\tfor x < 10 {\n",
1346 "\t\tx++\n",
1347 "\t}", //
1348 );
1349 chunks_tx.unbounded_send(new_text.to_string()).unwrap();
1350 drop(chunks_tx);
1351 cx.background_executor.run_until_parked();
1352
1353 assert_eq!(
1354 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1355 indoc! {"
1356 func main() {
1357 \tx := 0
1358 \tfor x < 10 {
1359 \t\tx++
1360 \t}
1361 }
1362 "}
1363 );
1364 }
1365
1366 #[gpui::test]
1367 async fn test_inactive_codegen_alternative(cx: &mut TestAppContext) {
1368 init_test(cx);
1369
1370 let text = indoc! {"
1371 fn main() {
1372 let x = 0;
1373 }
1374 "};
1375 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1376 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1377 let range = buffer.read_with(cx, |buffer, cx| {
1378 let snapshot = buffer.snapshot(cx);
1379 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(1, 14))
1380 });
1381 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1382 let fs = FakeFs::new(cx.executor());
1383 let project = Project::test(fs, vec![], cx).await;
1384 let codegen = cx.new(|cx| {
1385 CodegenAlternative::new(
1386 buffer.clone(),
1387 range.clone(),
1388 false,
1389 None,
1390 project.downgrade(),
1391 None,
1392 None,
1393 prompt_builder,
1394 cx,
1395 )
1396 });
1397
1398 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1399 chunks_tx
1400 .unbounded_send("let mut x = 0;\nx += 1;".to_string())
1401 .unwrap();
1402 drop(chunks_tx);
1403 cx.run_until_parked();
1404
1405 // The codegen is inactive, so the buffer doesn't get modified.
1406 assert_eq!(
1407 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1408 text
1409 );
1410
1411 // Activating the codegen applies the changes.
1412 codegen.update(cx, |codegen, cx| codegen.set_active(true, cx));
1413 assert_eq!(
1414 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1415 indoc! {"
1416 fn main() {
1417 let mut x = 0;
1418 x += 1;
1419 }
1420 "}
1421 );
1422
1423 // Deactivating the codegen undoes the changes.
1424 codegen.update(cx, |codegen, cx| codegen.set_active(false, cx));
1425 cx.run_until_parked();
1426 assert_eq!(
1427 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1428 text
1429 );
1430 }
1431
1432 #[gpui::test]
1433 async fn test_strip_invalid_spans_from_codeblock() {
1434 assert_chunks("Lorem ipsum dolor", "Lorem ipsum dolor").await;
1435 assert_chunks("```\nLorem ipsum dolor", "Lorem ipsum dolor").await;
1436 assert_chunks("```\nLorem ipsum dolor\n```", "Lorem ipsum dolor").await;
1437 assert_chunks(
1438 "```html\n```js\nLorem ipsum dolor\n```\n```",
1439 "```js\nLorem ipsum dolor\n```",
1440 )
1441 .await;
1442 assert_chunks("``\nLorem ipsum dolor\n```", "``\nLorem ipsum dolor\n```").await;
1443 assert_chunks("Lorem<|CURSOR|> ipsum", "Lorem ipsum").await;
1444 assert_chunks("Lorem ipsum", "Lorem ipsum").await;
1445 assert_chunks("```\n<|CURSOR|>Lorem ipsum\n```", "Lorem ipsum").await;
1446
1447 async fn assert_chunks(text: &str, expected_text: &str) {
1448 for chunk_size in 1..=text.len() {
1449 let actual_text = StripInvalidSpans::new(chunks(text, chunk_size))
1450 .map(|chunk| chunk.unwrap())
1451 .collect::<String>()
1452 .await;
1453 assert_eq!(
1454 actual_text, expected_text,
1455 "failed to strip invalid spans, chunk size: {}",
1456 chunk_size
1457 );
1458 }
1459 }
1460
1461 fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
1462 stream::iter(
1463 text.chars()
1464 .collect::<Vec<_>>()
1465 .chunks(size)
1466 .map(|chunk| Ok(chunk.iter().collect::<String>()))
1467 .collect::<Vec<_>>(),
1468 )
1469 }
1470 }
1471
1472 fn init_test(cx: &mut TestAppContext) {
1473 cx.update(LanguageModelRegistry::test);
1474 cx.set_global(cx.update(SettingsStore::test));
1475 cx.update(Project::init_settings);
1476 cx.update(language_settings::init);
1477 }
1478
1479 fn simulate_response_stream(
1480 codegen: Entity<CodegenAlternative>,
1481 cx: &mut TestAppContext,
1482 ) -> mpsc::UnboundedSender<String> {
1483 let (chunks_tx, chunks_rx) = mpsc::unbounded();
1484 codegen.update(cx, |codegen, cx| {
1485 codegen.handle_stream(
1486 String::new(),
1487 String::new(),
1488 None,
1489 future::ready(Ok(LanguageModelTextStream {
1490 message_id: None,
1491 stream: chunks_rx.map(Ok).boxed(),
1492 last_token_usage: Arc::new(Mutex::new(TokenUsage::default())),
1493 })),
1494 cx,
1495 );
1496 });
1497 chunks_tx
1498 }
1499
1500 fn rust_lang() -> Language {
1501 Language::new(
1502 LanguageConfig {
1503 name: "Rust".into(),
1504 matcher: LanguageMatcher {
1505 path_suffixes: vec!["rs".to_string()],
1506 ..Default::default()
1507 },
1508 ..Default::default()
1509 },
1510 Some(tree_sitter_rust::LANGUAGE.into()),
1511 )
1512 .with_indents_query(
1513 r#"
1514 (call_expression) @indent
1515 (field_expression) @indent
1516 (_ "(" ")" @end) @indent
1517 (_ "{" "}" @end) @indent
1518 "#,
1519 )
1520 .unwrap()
1521 }
1522}