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 self.transformation_transaction_id = None;
358 self.generation = Task::ready(());
359 cx.emit(CodegenEvent::Undone);
360 }
361 }
362
363 pub fn last_equal_ranges(&self) -> &[Range<Anchor>] {
364 &self.last_equal_ranges
365 }
366
367 pub fn start(
368 &mut self,
369 user_prompt: String,
370 model: Arc<dyn LanguageModel>,
371 cx: &mut Context<Self>,
372 ) -> Result<()> {
373 if let Some(transformation_transaction_id) = self.transformation_transaction_id.take() {
374 self.buffer.update(cx, |buffer, cx| {
375 buffer.undo_transaction(transformation_transaction_id, cx);
376 });
377 }
378
379 self.edit_position = Some(self.range.start.bias_right(&self.snapshot));
380
381 let api_key = model.api_key(cx);
382 let telemetry_id = model.telemetry_id();
383 let provider_id = model.provider_id();
384 let stream: LocalBoxFuture<Result<LanguageModelTextStream>> =
385 if user_prompt.trim().to_lowercase() == "delete" {
386 async { Ok(LanguageModelTextStream::default()) }.boxed_local()
387 } else {
388 let request = self.build_request(&model, user_prompt, cx)?;
389 cx.spawn(async move |_, cx| {
390 Ok(model.stream_completion_text(request.await, cx).await?)
391 })
392 .boxed_local()
393 };
394 self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
395 Ok(())
396 }
397
398 fn build_request(
399 &self,
400 model: &Arc<dyn LanguageModel>,
401 user_prompt: String,
402 cx: &mut App,
403 ) -> Result<Task<LanguageModelRequest>> {
404 let buffer = self.buffer.read(cx).snapshot(cx);
405 let language = buffer.language_at(self.range.start);
406 let language_name = if let Some(language) = language.as_ref() {
407 if Arc::ptr_eq(language, &language::PLAIN_TEXT) {
408 None
409 } else {
410 Some(language.name())
411 }
412 } else {
413 None
414 };
415
416 let language_name = language_name.as_ref();
417 let start = buffer.point_to_buffer_offset(self.range.start);
418 let end = buffer.point_to_buffer_offset(self.range.end);
419 let (buffer, range) = if let Some((start, end)) = start.zip(end) {
420 let (start_buffer, start_buffer_offset) = start;
421 let (end_buffer, end_buffer_offset) = end;
422 if start_buffer.remote_id() == end_buffer.remote_id() {
423 (start_buffer.clone(), start_buffer_offset..end_buffer_offset)
424 } else {
425 anyhow::bail!("invalid transformation range");
426 }
427 } else {
428 anyhow::bail!("invalid transformation range");
429 };
430
431 let prompt = self
432 .builder
433 .generate_inline_transformation_prompt(user_prompt, language_name, buffer, range)
434 .context("generating content prompt")?;
435
436 let context_task = self.context_store.as_ref().map(|context_store| {
437 if let Some(project) = self.project.upgrade() {
438 let context = context_store
439 .read(cx)
440 .context()
441 .cloned()
442 .collect::<Vec<_>>();
443 load_context(context, &project, &self.prompt_store, cx)
444 } else {
445 Task::ready(ContextLoadResult::default())
446 }
447 });
448
449 let temperature = AgentSettings::temperature_for_model(model, cx);
450
451 Ok(cx.spawn(async move |_cx| {
452 let mut request_message = LanguageModelRequestMessage {
453 role: Role::User,
454 content: Vec::new(),
455 cache: false,
456 };
457
458 if let Some(context_task) = context_task {
459 context_task
460 .await
461 .loaded_context
462 .add_to_request_message(&mut request_message);
463 }
464
465 request_message.content.push(prompt.into());
466
467 LanguageModelRequest {
468 thread_id: None,
469 prompt_id: None,
470 intent: Some(CompletionIntent::InlineAssist),
471 mode: None,
472 tools: Vec::new(),
473 tool_choice: None,
474 stop: Vec::new(),
475 temperature,
476 messages: vec![request_message],
477 thinking_allowed: false,
478 }
479 }))
480 }
481
482 pub fn handle_stream(
483 &mut self,
484 model_telemetry_id: String,
485 model_provider_id: String,
486 model_api_key: Option<String>,
487 stream: impl 'static + Future<Output = Result<LanguageModelTextStream>>,
488 cx: &mut Context<Self>,
489 ) {
490 let start_time = Instant::now();
491 let snapshot = self.snapshot.clone();
492 let selected_text = snapshot
493 .text_for_range(self.range.start..self.range.end)
494 .collect::<Rope>();
495
496 let selection_start = self.range.start.to_point(&snapshot);
497
498 // Start with the indentation of the first line in the selection
499 let mut suggested_line_indent = snapshot
500 .suggested_indents(selection_start.row..=selection_start.row, cx)
501 .into_values()
502 .next()
503 .unwrap_or_else(|| snapshot.indent_size_for_line(MultiBufferRow(selection_start.row)));
504
505 // If the first line in the selection does not have indentation, check the following lines
506 if suggested_line_indent.len == 0 && suggested_line_indent.kind == IndentKind::Space {
507 for row in selection_start.row..=self.range.end.to_point(&snapshot).row {
508 let line_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
509 // Prefer tabs if a line in the selection uses tabs as indentation
510 if line_indent.kind == IndentKind::Tab {
511 suggested_line_indent.kind = IndentKind::Tab;
512 break;
513 }
514 }
515 }
516
517 let http_client = cx.http_client();
518 let telemetry = self.telemetry.clone();
519 let language_name = {
520 let multibuffer = self.buffer.read(cx);
521 let snapshot = multibuffer.snapshot(cx);
522 let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
523 ranges
524 .first()
525 .and_then(|(buffer, _, _)| buffer.language())
526 .map(|language| language.name())
527 };
528
529 self.diff = Diff::default();
530 self.status = CodegenStatus::Pending;
531 let mut edit_start = self.range.start.to_offset(&snapshot);
532 let completion = Arc::new(Mutex::new(String::new()));
533 let completion_clone = completion.clone();
534
535 self.generation = cx.spawn(async move |codegen, cx| {
536 let stream = stream.await;
537 let token_usage = stream
538 .as_ref()
539 .ok()
540 .map(|stream| stream.last_token_usage.clone());
541 let message_id = stream
542 .as_ref()
543 .ok()
544 .and_then(|stream| stream.message_id.clone());
545 let generate = async {
546 let model_telemetry_id = model_telemetry_id.clone();
547 let model_provider_id = model_provider_id.clone();
548 let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
549 let executor = cx.background_executor().clone();
550 let message_id = message_id.clone();
551 let line_based_stream_diff: Task<anyhow::Result<()>> =
552 cx.background_spawn(async move {
553 let mut response_latency = None;
554 let request_start = Instant::now();
555 let diff = async {
556 let chunks = StripInvalidSpans::new(
557 stream?.stream.map_err(|error| error.into()),
558 );
559 futures::pin_mut!(chunks);
560 let mut diff = StreamingDiff::new(selected_text.to_string());
561 let mut line_diff = LineDiff::default();
562
563 let mut new_text = String::new();
564 let mut base_indent = None;
565 let mut line_indent = None;
566 let mut first_line = true;
567
568 while let Some(chunk) = chunks.next().await {
569 if response_latency.is_none() {
570 response_latency = Some(request_start.elapsed());
571 }
572 let chunk = chunk?;
573 completion_clone.lock().push_str(&chunk);
574
575 let mut lines = chunk.split('\n').peekable();
576 while let Some(line) = lines.next() {
577 new_text.push_str(line);
578 if line_indent.is_none()
579 && let Some(non_whitespace_ch_ix) =
580 new_text.find(|ch: char| !ch.is_whitespace())
581 {
582 line_indent = Some(non_whitespace_ch_ix);
583 base_indent = base_indent.or(line_indent);
584
585 let line_indent = line_indent.unwrap();
586 let base_indent = base_indent.unwrap();
587 let indent_delta =
588 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(
597 selection_start.column as usize,
598 );
599 }
600
601 let indent_char = suggested_line_indent.char();
602 let mut indent_buffer = [0; 4];
603 let indent_str =
604 indent_char.encode_utf8(&mut indent_buffer);
605 new_text.replace_range(
606 ..line_indent,
607 &indent_str.repeat(corrected_indent_len),
608 );
609 }
610
611 if line_indent.is_some() {
612 let char_ops = diff.push_new(&new_text);
613 line_diff.push_char_operations(&char_ops, &selected_text);
614 diff_tx
615 .send((char_ops, line_diff.line_operations()))
616 .await?;
617 new_text.clear();
618 }
619
620 if lines.peek().is_some() {
621 let char_ops = diff.push_new("\n");
622 line_diff.push_char_operations(&char_ops, &selected_text);
623 diff_tx
624 .send((char_ops, line_diff.line_operations()))
625 .await?;
626 if line_indent.is_none() {
627 // Don't write out the leading indentation in empty lines on the next line
628 // This is the case where the above if statement didn't clear the buffer
629 new_text.clear();
630 }
631 line_indent = None;
632 first_line = false;
633 }
634 }
635 }
636
637 let mut char_ops = diff.push_new(&new_text);
638 char_ops.extend(diff.finish());
639 line_diff.push_char_operations(&char_ops, &selected_text);
640 line_diff.finish(&selected_text);
641 diff_tx
642 .send((char_ops, line_diff.line_operations()))
643 .await?;
644
645 anyhow::Ok(())
646 };
647
648 let result = diff.await;
649
650 let error_message = result.as_ref().err().map(|error| error.to_string());
651 report_assistant_event(
652 AssistantEventData {
653 conversation_id: None,
654 message_id,
655 kind: AssistantKind::Inline,
656 phase: AssistantPhase::Response,
657 model: model_telemetry_id,
658 model_provider: model_provider_id,
659 response_latency,
660 error_message,
661 language_name: language_name.map(|name| name.to_proto()),
662 },
663 telemetry,
664 http_client,
665 model_api_key,
666 &executor,
667 );
668
669 result?;
670 Ok(())
671 });
672
673 while let Some((char_ops, line_ops)) = diff_rx.next().await {
674 codegen.update(cx, |codegen, cx| {
675 codegen.last_equal_ranges.clear();
676
677 let edits = char_ops
678 .into_iter()
679 .filter_map(|operation| match operation {
680 CharOperation::Insert { text } => {
681 let edit_start = snapshot.anchor_after(edit_start);
682 Some((edit_start..edit_start, text))
683 }
684 CharOperation::Delete { bytes } => {
685 let edit_end = edit_start + bytes;
686 let edit_range = snapshot.anchor_after(edit_start)
687 ..snapshot.anchor_before(edit_end);
688 edit_start = edit_end;
689 Some((edit_range, String::new()))
690 }
691 CharOperation::Keep { bytes } => {
692 let edit_end = edit_start + bytes;
693 let edit_range = snapshot.anchor_after(edit_start)
694 ..snapshot.anchor_before(edit_end);
695 edit_start = edit_end;
696 codegen.last_equal_ranges.push(edit_range);
697 None
698 }
699 })
700 .collect::<Vec<_>>();
701
702 if codegen.active {
703 codegen.apply_edits(edits.iter().cloned(), cx);
704 codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
705 }
706 codegen.edits.extend(edits);
707 codegen.line_operations = line_ops;
708 codegen.edit_position = Some(snapshot.anchor_after(edit_start));
709
710 cx.notify();
711 })?;
712 }
713
714 // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
715 // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
716 // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
717 let batch_diff_task =
718 codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
719 let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
720 line_based_stream_diff?;
721
722 anyhow::Ok(())
723 };
724
725 let result = generate.await;
726 let elapsed_time = start_time.elapsed().as_secs_f64();
727
728 codegen
729 .update(cx, |this, cx| {
730 this.message_id = message_id;
731 this.last_equal_ranges.clear();
732 if let Err(error) = result {
733 this.status = CodegenStatus::Error(error);
734 } else {
735 this.status = CodegenStatus::Done;
736 }
737 this.elapsed_time = Some(elapsed_time);
738 this.completion = Some(completion.lock().clone());
739 if let Some(usage) = token_usage {
740 let usage = usage.lock();
741 telemetry::event!(
742 "Inline Assistant Completion",
743 model = model_telemetry_id,
744 model_provider = model_provider_id,
745 input_tokens = usage.input_tokens,
746 output_tokens = usage.output_tokens,
747 )
748 }
749 cx.emit(CodegenEvent::Finished);
750 cx.notify();
751 })
752 .ok();
753 });
754 cx.notify();
755 }
756
757 pub fn stop(&mut self, cx: &mut Context<Self>) {
758 self.last_equal_ranges.clear();
759 if self.diff.is_empty() {
760 self.status = CodegenStatus::Idle;
761 } else {
762 self.status = CodegenStatus::Done;
763 }
764 self.generation = Task::ready(());
765 cx.emit(CodegenEvent::Finished);
766 cx.notify();
767 }
768
769 pub fn undo(&mut self, cx: &mut Context<Self>) {
770 self.buffer.update(cx, |buffer, cx| {
771 if let Some(transaction_id) = self.transformation_transaction_id.take() {
772 buffer.undo_transaction(transaction_id, cx);
773 buffer.refresh_preview(cx);
774 }
775 });
776 }
777
778 fn apply_edits(
779 &mut self,
780 edits: impl IntoIterator<Item = (Range<Anchor>, String)>,
781 cx: &mut Context<CodegenAlternative>,
782 ) {
783 let transaction = self.buffer.update(cx, |buffer, cx| {
784 // Avoid grouping agent edits with user edits.
785 buffer.finalize_last_transaction(cx);
786 buffer.start_transaction(cx);
787 buffer.edit(edits, None, cx);
788 buffer.end_transaction(cx)
789 });
790
791 if let Some(transaction) = transaction {
792 if let Some(first_transaction) = self.transformation_transaction_id {
793 // Group all agent edits into the first transaction.
794 self.buffer.update(cx, |buffer, cx| {
795 buffer.merge_transactions(transaction, first_transaction, cx)
796 });
797 } else {
798 self.transformation_transaction_id = Some(transaction);
799 self.buffer
800 .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
801 }
802 }
803 }
804
805 fn reapply_line_based_diff(
806 &mut self,
807 line_operations: impl IntoIterator<Item = LineOperation>,
808 cx: &mut Context<Self>,
809 ) {
810 let old_snapshot = self.snapshot.clone();
811 let old_range = self.range.to_point(&old_snapshot);
812 let new_snapshot = self.buffer.read(cx).snapshot(cx);
813 let new_range = self.range.to_point(&new_snapshot);
814
815 let mut old_row = old_range.start.row;
816 let mut new_row = new_range.start.row;
817
818 self.diff.deleted_row_ranges.clear();
819 self.diff.inserted_row_ranges.clear();
820 for operation in line_operations {
821 match operation {
822 LineOperation::Keep { lines } => {
823 old_row += lines;
824 new_row += lines;
825 }
826 LineOperation::Delete { lines } => {
827 let old_end_row = old_row + lines - 1;
828 let new_row = new_snapshot.anchor_before(Point::new(new_row, 0));
829
830 if let Some((_, last_deleted_row_range)) =
831 self.diff.deleted_row_ranges.last_mut()
832 {
833 if *last_deleted_row_range.end() + 1 == old_row {
834 *last_deleted_row_range = *last_deleted_row_range.start()..=old_end_row;
835 } else {
836 self.diff
837 .deleted_row_ranges
838 .push((new_row, old_row..=old_end_row));
839 }
840 } else {
841 self.diff
842 .deleted_row_ranges
843 .push((new_row, old_row..=old_end_row));
844 }
845
846 old_row += lines;
847 }
848 LineOperation::Insert { lines } => {
849 let new_end_row = new_row + lines - 1;
850 let start = new_snapshot.anchor_before(Point::new(new_row, 0));
851 let end = new_snapshot.anchor_before(Point::new(
852 new_end_row,
853 new_snapshot.line_len(MultiBufferRow(new_end_row)),
854 ));
855 self.diff.inserted_row_ranges.push(start..end);
856 new_row += lines;
857 }
858 }
859
860 cx.notify();
861 }
862 }
863
864 fn reapply_batch_diff(&mut self, cx: &mut Context<Self>) -> Task<()> {
865 let old_snapshot = self.snapshot.clone();
866 let old_range = self.range.to_point(&old_snapshot);
867 let new_snapshot = self.buffer.read(cx).snapshot(cx);
868 let new_range = self.range.to_point(&new_snapshot);
869
870 cx.spawn(async move |codegen, cx| {
871 let (deleted_row_ranges, inserted_row_ranges) = cx
872 .background_spawn(async move {
873 let old_text = old_snapshot
874 .text_for_range(
875 Point::new(old_range.start.row, 0)
876 ..Point::new(
877 old_range.end.row,
878 old_snapshot.line_len(MultiBufferRow(old_range.end.row)),
879 ),
880 )
881 .collect::<String>();
882 let new_text = new_snapshot
883 .text_for_range(
884 Point::new(new_range.start.row, 0)
885 ..Point::new(
886 new_range.end.row,
887 new_snapshot.line_len(MultiBufferRow(new_range.end.row)),
888 ),
889 )
890 .collect::<String>();
891
892 let old_start_row = old_range.start.row;
893 let new_start_row = new_range.start.row;
894 let mut deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)> = Vec::new();
895 let mut inserted_row_ranges = Vec::new();
896 for (old_rows, new_rows) in line_diff(&old_text, &new_text) {
897 let old_rows = old_start_row + old_rows.start..old_start_row + old_rows.end;
898 let new_rows = new_start_row + new_rows.start..new_start_row + new_rows.end;
899 if !old_rows.is_empty() {
900 deleted_row_ranges.push((
901 new_snapshot.anchor_before(Point::new(new_rows.start, 0)),
902 old_rows.start..=old_rows.end - 1,
903 ));
904 }
905 if !new_rows.is_empty() {
906 let start = new_snapshot.anchor_before(Point::new(new_rows.start, 0));
907 let new_end_row = new_rows.end - 1;
908 let end = new_snapshot.anchor_before(Point::new(
909 new_end_row,
910 new_snapshot.line_len(MultiBufferRow(new_end_row)),
911 ));
912 inserted_row_ranges.push(start..end);
913 }
914 }
915 (deleted_row_ranges, inserted_row_ranges)
916 })
917 .await;
918
919 codegen
920 .update(cx, |codegen, cx| {
921 codegen.diff.deleted_row_ranges = deleted_row_ranges;
922 codegen.diff.inserted_row_ranges = inserted_row_ranges;
923 cx.notify();
924 })
925 .ok();
926 })
927 }
928}
929
930#[derive(Copy, Clone, Debug)]
931pub enum CodegenEvent {
932 Finished,
933 Undone,
934}
935
936struct StripInvalidSpans<T> {
937 stream: T,
938 stream_done: bool,
939 buffer: String,
940 first_line: bool,
941 line_end: bool,
942 starts_with_code_block: bool,
943}
944
945impl<T> StripInvalidSpans<T>
946where
947 T: Stream<Item = Result<String>>,
948{
949 fn new(stream: T) -> Self {
950 Self {
951 stream,
952 stream_done: false,
953 buffer: String::new(),
954 first_line: true,
955 line_end: false,
956 starts_with_code_block: false,
957 }
958 }
959}
960
961impl<T> Stream for StripInvalidSpans<T>
962where
963 T: Stream<Item = Result<String>>,
964{
965 type Item = Result<String>;
966
967 fn poll_next(self: Pin<&mut Self>, cx: &mut task::Context) -> Poll<Option<Self::Item>> {
968 const CODE_BLOCK_DELIMITER: &str = "```";
969 const CURSOR_SPAN: &str = "<|CURSOR|>";
970
971 let this = unsafe { self.get_unchecked_mut() };
972 loop {
973 if !this.stream_done {
974 let mut stream = unsafe { Pin::new_unchecked(&mut this.stream) };
975 match stream.as_mut().poll_next(cx) {
976 Poll::Ready(Some(Ok(chunk))) => {
977 this.buffer.push_str(&chunk);
978 }
979 Poll::Ready(Some(Err(error))) => return Poll::Ready(Some(Err(error))),
980 Poll::Ready(None) => {
981 this.stream_done = true;
982 }
983 Poll::Pending => return Poll::Pending,
984 }
985 }
986
987 let mut chunk = String::new();
988 let mut consumed = 0;
989 if !this.buffer.is_empty() {
990 let mut lines = this.buffer.split('\n').enumerate().peekable();
991 while let Some((line_ix, line)) = lines.next() {
992 if line_ix > 0 {
993 this.first_line = false;
994 }
995
996 if this.first_line {
997 let trimmed_line = line.trim();
998 if lines.peek().is_some() {
999 if trimmed_line.starts_with(CODE_BLOCK_DELIMITER) {
1000 consumed += line.len() + 1;
1001 this.starts_with_code_block = true;
1002 continue;
1003 }
1004 } else if trimmed_line.is_empty()
1005 || prefixes(CODE_BLOCK_DELIMITER)
1006 .any(|prefix| trimmed_line.starts_with(prefix))
1007 {
1008 break;
1009 }
1010 }
1011
1012 let line_without_cursor = line.replace(CURSOR_SPAN, "");
1013 if lines.peek().is_some() {
1014 if this.line_end {
1015 chunk.push('\n');
1016 }
1017
1018 chunk.push_str(&line_without_cursor);
1019 this.line_end = true;
1020 consumed += line.len() + 1;
1021 } else if this.stream_done {
1022 if !this.starts_with_code_block
1023 || !line_without_cursor.trim().ends_with(CODE_BLOCK_DELIMITER)
1024 {
1025 if this.line_end {
1026 chunk.push('\n');
1027 }
1028
1029 chunk.push_str(line);
1030 }
1031
1032 consumed += line.len();
1033 } else {
1034 let trimmed_line = line.trim();
1035 if trimmed_line.is_empty()
1036 || prefixes(CURSOR_SPAN).any(|prefix| trimmed_line.ends_with(prefix))
1037 || prefixes(CODE_BLOCK_DELIMITER)
1038 .any(|prefix| trimmed_line.ends_with(prefix))
1039 {
1040 break;
1041 } else {
1042 if this.line_end {
1043 chunk.push('\n');
1044 this.line_end = false;
1045 }
1046
1047 chunk.push_str(&line_without_cursor);
1048 consumed += line.len();
1049 }
1050 }
1051 }
1052 }
1053
1054 this.buffer = this.buffer.split_off(consumed);
1055 if !chunk.is_empty() {
1056 return Poll::Ready(Some(Ok(chunk)));
1057 } else if this.stream_done {
1058 return Poll::Ready(None);
1059 }
1060 }
1061 }
1062}
1063
1064fn prefixes(text: &str) -> impl Iterator<Item = &str> {
1065 (0..text.len() - 1).map(|ix| &text[..ix + 1])
1066}
1067
1068#[derive(Default)]
1069pub struct Diff {
1070 pub deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)>,
1071 pub inserted_row_ranges: Vec<Range<Anchor>>,
1072}
1073
1074impl Diff {
1075 fn is_empty(&self) -> bool {
1076 self.deleted_row_ranges.is_empty() && self.inserted_row_ranges.is_empty()
1077 }
1078}
1079
1080#[cfg(test)]
1081mod tests {
1082 use super::*;
1083 use fs::FakeFs;
1084 use futures::{
1085 Stream,
1086 stream::{self},
1087 };
1088 use gpui::TestAppContext;
1089 use indoc::indoc;
1090 use language::{
1091 Buffer, Language, LanguageConfig, LanguageMatcher, Point, language_settings,
1092 tree_sitter_rust,
1093 };
1094 use language_model::{LanguageModelRegistry, TokenUsage};
1095 use rand::prelude::*;
1096 use settings::SettingsStore;
1097 use std::{future, sync::Arc};
1098
1099 #[gpui::test(iterations = 10)]
1100 async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
1101 init_test(cx);
1102
1103 let text = indoc! {"
1104 fn main() {
1105 let x = 0;
1106 for _ in 0..10 {
1107 x += 1;
1108 }
1109 }
1110 "};
1111 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1112 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1113 let range = buffer.read_with(cx, |buffer, cx| {
1114 let snapshot = buffer.snapshot(cx);
1115 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
1116 });
1117 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1118 let fs = FakeFs::new(cx.executor());
1119 let project = Project::test(fs, vec![], cx).await;
1120 let codegen = cx.new(|cx| {
1121 CodegenAlternative::new(
1122 buffer.clone(),
1123 range.clone(),
1124 true,
1125 None,
1126 project.downgrade(),
1127 None,
1128 None,
1129 prompt_builder,
1130 cx,
1131 )
1132 });
1133
1134 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1135
1136 let mut new_text = concat!(
1137 " let mut x = 0;\n",
1138 " while x < 10 {\n",
1139 " x += 1;\n",
1140 " }",
1141 );
1142 while !new_text.is_empty() {
1143 let max_len = cmp::min(new_text.len(), 10);
1144 let len = rng.gen_range(1..=max_len);
1145 let (chunk, suffix) = new_text.split_at(len);
1146 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1147 new_text = suffix;
1148 cx.background_executor.run_until_parked();
1149 }
1150 drop(chunks_tx);
1151 cx.background_executor.run_until_parked();
1152
1153 assert_eq!(
1154 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1155 indoc! {"
1156 fn main() {
1157 let mut x = 0;
1158 while x < 10 {
1159 x += 1;
1160 }
1161 }
1162 "}
1163 );
1164 }
1165
1166 #[gpui::test(iterations = 10)]
1167 async fn test_autoindent_when_generating_past_indentation(
1168 cx: &mut TestAppContext,
1169 mut rng: StdRng,
1170 ) {
1171 init_test(cx);
1172
1173 let text = indoc! {"
1174 fn main() {
1175 le
1176 }
1177 "};
1178 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1179 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1180 let range = buffer.read_with(cx, |buffer, cx| {
1181 let snapshot = buffer.snapshot(cx);
1182 snapshot.anchor_before(Point::new(1, 6))..snapshot.anchor_after(Point::new(1, 6))
1183 });
1184 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1185 let fs = FakeFs::new(cx.executor());
1186 let project = Project::test(fs, vec![], cx).await;
1187 let codegen = cx.new(|cx| {
1188 CodegenAlternative::new(
1189 buffer.clone(),
1190 range.clone(),
1191 true,
1192 None,
1193 project.downgrade(),
1194 None,
1195 None,
1196 prompt_builder,
1197 cx,
1198 )
1199 });
1200
1201 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1202
1203 cx.background_executor.run_until_parked();
1204
1205 let mut new_text = concat!(
1206 "t mut x = 0;\n",
1207 "while x < 10 {\n",
1208 " x += 1;\n",
1209 "}", //
1210 );
1211 while !new_text.is_empty() {
1212 let max_len = cmp::min(new_text.len(), 10);
1213 let len = rng.gen_range(1..=max_len);
1214 let (chunk, suffix) = new_text.split_at(len);
1215 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1216 new_text = suffix;
1217 cx.background_executor.run_until_parked();
1218 }
1219 drop(chunks_tx);
1220 cx.background_executor.run_until_parked();
1221
1222 assert_eq!(
1223 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1224 indoc! {"
1225 fn main() {
1226 let mut x = 0;
1227 while x < 10 {
1228 x += 1;
1229 }
1230 }
1231 "}
1232 );
1233 }
1234
1235 #[gpui::test(iterations = 10)]
1236 async fn test_autoindent_when_generating_before_indentation(
1237 cx: &mut TestAppContext,
1238 mut rng: StdRng,
1239 ) {
1240 init_test(cx);
1241
1242 let text = concat!(
1243 "fn main() {\n",
1244 " \n",
1245 "}\n" //
1246 );
1247 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1248 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1249 let range = buffer.read_with(cx, |buffer, cx| {
1250 let snapshot = buffer.snapshot(cx);
1251 snapshot.anchor_before(Point::new(1, 2))..snapshot.anchor_after(Point::new(1, 2))
1252 });
1253 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1254 let fs = FakeFs::new(cx.executor());
1255 let project = Project::test(fs, vec![], cx).await;
1256 let codegen = cx.new(|cx| {
1257 CodegenAlternative::new(
1258 buffer.clone(),
1259 range.clone(),
1260 true,
1261 None,
1262 project.downgrade(),
1263 None,
1264 None,
1265 prompt_builder,
1266 cx,
1267 )
1268 });
1269
1270 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1271
1272 cx.background_executor.run_until_parked();
1273
1274 let mut new_text = concat!(
1275 "let mut x = 0;\n",
1276 "while x < 10 {\n",
1277 " x += 1;\n",
1278 "}", //
1279 );
1280 while !new_text.is_empty() {
1281 let max_len = cmp::min(new_text.len(), 10);
1282 let len = rng.gen_range(1..=max_len);
1283 let (chunk, suffix) = new_text.split_at(len);
1284 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1285 new_text = suffix;
1286 cx.background_executor.run_until_parked();
1287 }
1288 drop(chunks_tx);
1289 cx.background_executor.run_until_parked();
1290
1291 assert_eq!(
1292 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1293 indoc! {"
1294 fn main() {
1295 let mut x = 0;
1296 while x < 10 {
1297 x += 1;
1298 }
1299 }
1300 "}
1301 );
1302 }
1303
1304 #[gpui::test(iterations = 10)]
1305 async fn test_autoindent_respects_tabs_in_selection(cx: &mut TestAppContext) {
1306 init_test(cx);
1307
1308 let text = indoc! {"
1309 func main() {
1310 \tx := 0
1311 \tfor i := 0; i < 10; i++ {
1312 \t\tx++
1313 \t}
1314 }
1315 "};
1316 let buffer = cx.new(|cx| Buffer::local(text, cx));
1317 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1318 let range = buffer.read_with(cx, |buffer, cx| {
1319 let snapshot = buffer.snapshot(cx);
1320 snapshot.anchor_before(Point::new(0, 0))..snapshot.anchor_after(Point::new(4, 2))
1321 });
1322 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1323 let fs = FakeFs::new(cx.executor());
1324 let project = Project::test(fs, vec![], cx).await;
1325 let codegen = cx.new(|cx| {
1326 CodegenAlternative::new(
1327 buffer.clone(),
1328 range.clone(),
1329 true,
1330 None,
1331 project.downgrade(),
1332 None,
1333 None,
1334 prompt_builder,
1335 cx,
1336 )
1337 });
1338
1339 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1340 let new_text = concat!(
1341 "func main() {\n",
1342 "\tx := 0\n",
1343 "\tfor x < 10 {\n",
1344 "\t\tx++\n",
1345 "\t}", //
1346 );
1347 chunks_tx.unbounded_send(new_text.to_string()).unwrap();
1348 drop(chunks_tx);
1349 cx.background_executor.run_until_parked();
1350
1351 assert_eq!(
1352 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1353 indoc! {"
1354 func main() {
1355 \tx := 0
1356 \tfor x < 10 {
1357 \t\tx++
1358 \t}
1359 }
1360 "}
1361 );
1362 }
1363
1364 #[gpui::test]
1365 async fn test_inactive_codegen_alternative(cx: &mut TestAppContext) {
1366 init_test(cx);
1367
1368 let text = indoc! {"
1369 fn main() {
1370 let x = 0;
1371 }
1372 "};
1373 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1374 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1375 let range = buffer.read_with(cx, |buffer, cx| {
1376 let snapshot = buffer.snapshot(cx);
1377 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(1, 14))
1378 });
1379 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1380 let fs = FakeFs::new(cx.executor());
1381 let project = Project::test(fs, vec![], cx).await;
1382 let codegen = cx.new(|cx| {
1383 CodegenAlternative::new(
1384 buffer.clone(),
1385 range.clone(),
1386 false,
1387 None,
1388 project.downgrade(),
1389 None,
1390 None,
1391 prompt_builder,
1392 cx,
1393 )
1394 });
1395
1396 let chunks_tx = simulate_response_stream(codegen.clone(), cx);
1397 chunks_tx
1398 .unbounded_send("let mut x = 0;\nx += 1;".to_string())
1399 .unwrap();
1400 drop(chunks_tx);
1401 cx.run_until_parked();
1402
1403 // The codegen is inactive, so the buffer doesn't get modified.
1404 assert_eq!(
1405 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1406 text
1407 );
1408
1409 // Activating the codegen applies the changes.
1410 codegen.update(cx, |codegen, cx| codegen.set_active(true, cx));
1411 assert_eq!(
1412 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1413 indoc! {"
1414 fn main() {
1415 let mut x = 0;
1416 x += 1;
1417 }
1418 "}
1419 );
1420
1421 // Deactivating the codegen undoes the changes.
1422 codegen.update(cx, |codegen, cx| codegen.set_active(false, cx));
1423 cx.run_until_parked();
1424 assert_eq!(
1425 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1426 text
1427 );
1428 }
1429
1430 #[gpui::test]
1431 async fn test_strip_invalid_spans_from_codeblock() {
1432 assert_chunks("Lorem ipsum dolor", "Lorem ipsum dolor").await;
1433 assert_chunks("```\nLorem ipsum dolor", "Lorem ipsum dolor").await;
1434 assert_chunks("```\nLorem ipsum dolor\n```", "Lorem ipsum dolor").await;
1435 assert_chunks(
1436 "```html\n```js\nLorem ipsum dolor\n```\n```",
1437 "```js\nLorem ipsum dolor\n```",
1438 )
1439 .await;
1440 assert_chunks("``\nLorem ipsum dolor\n```", "``\nLorem ipsum dolor\n```").await;
1441 assert_chunks("Lorem<|CURSOR|> ipsum", "Lorem ipsum").await;
1442 assert_chunks("Lorem ipsum", "Lorem ipsum").await;
1443 assert_chunks("```\n<|CURSOR|>Lorem ipsum\n```", "Lorem ipsum").await;
1444
1445 async fn assert_chunks(text: &str, expected_text: &str) {
1446 for chunk_size in 1..=text.len() {
1447 let actual_text = StripInvalidSpans::new(chunks(text, chunk_size))
1448 .map(|chunk| chunk.unwrap())
1449 .collect::<String>()
1450 .await;
1451 assert_eq!(
1452 actual_text, expected_text,
1453 "failed to strip invalid spans, chunk size: {}",
1454 chunk_size
1455 );
1456 }
1457 }
1458
1459 fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
1460 stream::iter(
1461 text.chars()
1462 .collect::<Vec<_>>()
1463 .chunks(size)
1464 .map(|chunk| Ok(chunk.iter().collect::<String>()))
1465 .collect::<Vec<_>>(),
1466 )
1467 }
1468 }
1469
1470 fn init_test(cx: &mut TestAppContext) {
1471 cx.update(LanguageModelRegistry::test);
1472 cx.set_global(cx.update(SettingsStore::test));
1473 cx.update(Project::init_settings);
1474 cx.update(language_settings::init);
1475 }
1476
1477 fn simulate_response_stream(
1478 codegen: Entity<CodegenAlternative>,
1479 cx: &mut TestAppContext,
1480 ) -> mpsc::UnboundedSender<String> {
1481 let (chunks_tx, chunks_rx) = mpsc::unbounded();
1482 codegen.update(cx, |codegen, cx| {
1483 codegen.handle_stream(
1484 String::new(),
1485 String::new(),
1486 None,
1487 future::ready(Ok(LanguageModelTextStream {
1488 message_id: None,
1489 stream: chunks_rx.map(Ok).boxed(),
1490 last_token_usage: Arc::new(Mutex::new(TokenUsage::default())),
1491 })),
1492 cx,
1493 );
1494 });
1495 chunks_tx
1496 }
1497
1498 fn rust_lang() -> Language {
1499 Language::new(
1500 LanguageConfig {
1501 name: "Rust".into(),
1502 matcher: LanguageMatcher {
1503 path_suffixes: vec!["rs".to_string()],
1504 ..Default::default()
1505 },
1506 ..Default::default()
1507 },
1508 Some(tree_sitter_rust::LANGUAGE.into()),
1509 )
1510 .with_indents_query(
1511 r#"
1512 (call_expression) @indent
1513 (field_expression) @indent
1514 (_ "(" ")" @end) @indent
1515 (_ "{" "}" @end) @indent
1516 "#,
1517 )
1518 .unwrap()
1519 }
1520}