1use crate::context::ContextLoadResult;
2use crate::inline_prompt_editor::CodegenStatus;
3use crate::{context::load_context, context_store::ContextStore};
4use agent_settings::AgentSettings;
5use anyhow::{Context as _, Result};
6use client::telemetry::Telemetry;
7use collections::HashSet;
8use editor::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint};
9use futures::{
10 SinkExt, Stream, StreamExt, TryStreamExt as _, channel::mpsc, future::LocalBoxFuture, join,
11};
12use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Subscription, Task, WeakEntity};
13use language::{Buffer, IndentKind, Point, TransactionId, line_diff};
14use language_model::{
15 LanguageModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
16 LanguageModelTextStream, Role, report_assistant_event,
17};
18use multi_buffer::MultiBufferRow;
19use parking_lot::Mutex;
20use project::Project;
21use prompt_store::PromptBuilder;
22use prompt_store::PromptStore;
23use rope::Rope;
24use smol::future::FutureExt;
25use std::{
26 cmp,
27 future::Future,
28 iter,
29 ops::{Range, RangeInclusive},
30 pin::Pin,
31 sync::Arc,
32 task::{self, Poll},
33 time::Instant,
34};
35use streaming_diff::{CharOperation, LineDiff, LineOperation, StreamingDiff};
36use telemetry_events::{AssistantEventData, AssistantKind, AssistantPhase};
37
38pub struct BufferCodegen {
39 alternatives: Vec<Entity<CodegenAlternative>>,
40 pub active_alternative: usize,
41 seen_alternatives: HashSet<usize>,
42 subscriptions: Vec<Subscription>,
43 buffer: Entity<MultiBuffer>,
44 range: Range<Anchor>,
45 initial_transaction_id: Option<TransactionId>,
46 context_store: Entity<ContextStore>,
47 project: WeakEntity<Project>,
48 prompt_store: Option<Entity<PromptStore>>,
49 telemetry: Arc<Telemetry>,
50 builder: Arc<PromptBuilder>,
51 pub is_insertion: bool,
52}
53
54impl BufferCodegen {
55 pub fn new(
56 buffer: Entity<MultiBuffer>,
57 range: Range<Anchor>,
58 initial_transaction_id: Option<TransactionId>,
59 context_store: Entity<ContextStore>,
60 project: WeakEntity<Project>,
61 prompt_store: Option<Entity<PromptStore>>,
62 telemetry: Arc<Telemetry>,
63 builder: Arc<PromptBuilder>,
64 cx: &mut Context<Self>,
65 ) -> Self {
66 let codegen = cx.new(|cx| {
67 CodegenAlternative::new(
68 buffer.clone(),
69 range.clone(),
70 false,
71 Some(context_store.clone()),
72 project.clone(),
73 prompt_store.clone(),
74 Some(telemetry.clone()),
75 builder.clone(),
76 cx,
77 )
78 });
79 let mut this = Self {
80 is_insertion: range.to_offset(&buffer.read(cx).snapshot(cx)).is_empty(),
81 alternatives: vec![codegen],
82 active_alternative: 0,
83 seen_alternatives: HashSet::default(),
84 subscriptions: Vec::new(),
85 buffer,
86 range,
87 initial_transaction_id,
88 context_store,
89 project,
90 prompt_store,
91 telemetry,
92 builder,
93 };
94 this.activate(0, cx);
95 this
96 }
97
98 fn subscribe_to_alternative(&mut self, cx: &mut Context<Self>) {
99 let codegen = self.active_alternative().clone();
100 self.subscriptions.clear();
101 self.subscriptions
102 .push(cx.observe(&codegen, |_, _, cx| cx.notify()));
103 self.subscriptions
104 .push(cx.subscribe(&codegen, |_, _, event, cx| cx.emit(*event)));
105 }
106
107 pub fn active_alternative(&self) -> &Entity<CodegenAlternative> {
108 &self.alternatives[self.active_alternative]
109 }
110
111 pub fn status<'a>(&self, cx: &'a App) -> &'a CodegenStatus {
112 &self.active_alternative().read(cx).status
113 }
114
115 pub fn alternative_count(&self, cx: &App) -> usize {
116 LanguageModelRegistry::read_global(cx)
117 .inline_alternative_models()
118 .len()
119 + 1
120 }
121
122 pub fn cycle_prev(&mut self, cx: &mut Context<Self>) {
123 let next_active_ix = if self.active_alternative == 0 {
124 self.alternatives.len() - 1
125 } else {
126 self.active_alternative - 1
127 };
128 self.activate(next_active_ix, cx);
129 }
130
131 pub fn cycle_next(&mut self, cx: &mut Context<Self>) {
132 let next_active_ix = (self.active_alternative + 1) % self.alternatives.len();
133 self.activate(next_active_ix, cx);
134 }
135
136 fn activate(&mut self, index: usize, cx: &mut Context<Self>) {
137 self.active_alternative()
138 .update(cx, |codegen, cx| codegen.set_active(false, cx));
139 self.seen_alternatives.insert(index);
140 self.active_alternative = index;
141 self.active_alternative()
142 .update(cx, |codegen, cx| codegen.set_active(true, cx));
143 self.subscribe_to_alternative(cx);
144 cx.notify();
145 }
146
147 pub fn start(
148 &mut self,
149 primary_model: Arc<dyn LanguageModel>,
150 user_prompt: String,
151 cx: &mut Context<Self>,
152 ) -> Result<()> {
153 let alternative_models = LanguageModelRegistry::read_global(cx)
154 .inline_alternative_models()
155 .to_vec();
156
157 self.active_alternative()
158 .update(cx, |alternative, cx| alternative.undo(cx));
159 self.activate(0, cx);
160 self.alternatives.truncate(1);
161
162 for _ in 0..alternative_models.len() {
163 self.alternatives.push(cx.new(|cx| {
164 CodegenAlternative::new(
165 self.buffer.clone(),
166 self.range.clone(),
167 false,
168 Some(self.context_store.clone()),
169 self.project.clone(),
170 self.prompt_store.clone(),
171 Some(self.telemetry.clone()),
172 self.builder.clone(),
173 cx,
174 )
175 }));
176 }
177
178 for (model, alternative) in iter::once(primary_model)
179 .chain(alternative_models)
180 .zip(&self.alternatives)
181 {
182 alternative.update(cx, |alternative, cx| {
183 alternative.start(user_prompt.clone(), model.clone(), cx)
184 })?;
185 }
186
187 Ok(())
188 }
189
190 pub fn stop(&mut self, cx: &mut Context<Self>) {
191 for codegen in &self.alternatives {
192 codegen.update(cx, |codegen, cx| codegen.stop(cx));
193 }
194 }
195
196 pub fn undo(&mut self, cx: &mut Context<Self>) {
197 self.active_alternative()
198 .update(cx, |codegen, cx| codegen.undo(cx));
199
200 self.buffer.update(cx, |buffer, cx| {
201 if let Some(transaction_id) = self.initial_transaction_id.take() {
202 buffer.undo_transaction(transaction_id, cx);
203 buffer.refresh_preview(cx);
204 }
205 });
206 }
207
208 pub fn buffer(&self, cx: &App) -> Entity<MultiBuffer> {
209 self.active_alternative().read(cx).buffer.clone()
210 }
211
212 pub fn old_buffer(&self, cx: &App) -> Entity<Buffer> {
213 self.active_alternative().read(cx).old_buffer.clone()
214 }
215
216 pub fn snapshot(&self, cx: &App) -> MultiBufferSnapshot {
217 self.active_alternative().read(cx).snapshot.clone()
218 }
219
220 pub fn edit_position(&self, cx: &App) -> Option<Anchor> {
221 self.active_alternative().read(cx).edit_position
222 }
223
224 pub fn diff<'a>(&self, cx: &'a App) -> &'a Diff {
225 &self.active_alternative().read(cx).diff
226 }
227
228 pub fn last_equal_ranges<'a>(&self, cx: &'a App) -> &'a [Range<Anchor>] {
229 self.active_alternative().read(cx).last_equal_ranges()
230 }
231}
232
233impl EventEmitter<CodegenEvent> for BufferCodegen {}
234
235pub struct CodegenAlternative {
236 buffer: Entity<MultiBuffer>,
237 old_buffer: Entity<Buffer>,
238 snapshot: MultiBufferSnapshot,
239 edit_position: Option<Anchor>,
240 range: Range<Anchor>,
241 last_equal_ranges: Vec<Range<Anchor>>,
242 transformation_transaction_id: Option<TransactionId>,
243 status: CodegenStatus,
244 generation: Task<()>,
245 diff: Diff,
246 context_store: Option<Entity<ContextStore>>,
247 project: WeakEntity<Project>,
248 prompt_store: Option<Entity<PromptStore>>,
249 telemetry: Option<Arc<Telemetry>>,
250 _subscription: gpui::Subscription,
251 builder: Arc<PromptBuilder>,
252 active: bool,
253 edits: Vec<(Range<Anchor>, String)>,
254 line_operations: Vec<LineOperation>,
255 elapsed_time: Option<f64>,
256 completion: Option<String>,
257 pub message_id: Option<String>,
258}
259
260impl EventEmitter<CodegenEvent> for CodegenAlternative {}
261
262impl CodegenAlternative {
263 pub fn new(
264 buffer: Entity<MultiBuffer>,
265 range: Range<Anchor>,
266 active: bool,
267 context_store: Option<Entity<ContextStore>>,
268 project: WeakEntity<Project>,
269 prompt_store: Option<Entity<PromptStore>>,
270 telemetry: Option<Arc<Telemetry>>,
271 builder: Arc<PromptBuilder>,
272 cx: &mut Context<Self>,
273 ) -> Self {
274 let snapshot = buffer.read(cx).snapshot(cx);
275
276 let (old_buffer, _, _) = snapshot
277 .range_to_buffer_ranges(range.clone())
278 .pop()
279 .unwrap();
280 let old_buffer = cx.new(|cx| {
281 let text = old_buffer.as_rope().clone();
282 let line_ending = old_buffer.line_ending();
283 let language = old_buffer.language().cloned();
284 let language_registry = buffer
285 .read(cx)
286 .buffer(old_buffer.remote_id())
287 .unwrap()
288 .read(cx)
289 .language_registry();
290
291 let mut buffer = Buffer::local_normalized(text, line_ending, cx);
292 buffer.set_language(language, cx);
293 if let Some(language_registry) = language_registry {
294 buffer.set_language_registry(language_registry)
295 }
296 buffer
297 });
298
299 Self {
300 buffer: buffer.clone(),
301 old_buffer,
302 edit_position: None,
303 message_id: None,
304 snapshot,
305 last_equal_ranges: Default::default(),
306 transformation_transaction_id: None,
307 status: CodegenStatus::Idle,
308 generation: Task::ready(()),
309 diff: Diff::default(),
310 context_store,
311 project,
312 prompt_store,
313 telemetry,
314 _subscription: cx.subscribe(&buffer, Self::handle_buffer_event),
315 builder,
316 active,
317 edits: Vec::new(),
318 line_operations: Vec::new(),
319 range,
320 elapsed_time: None,
321 completion: None,
322 }
323 }
324
325 pub fn set_active(&mut self, active: bool, cx: &mut Context<Self>) {
326 if active != self.active {
327 self.active = active;
328
329 if self.active {
330 let edits = self.edits.clone();
331 self.apply_edits(edits, cx);
332 if matches!(self.status, CodegenStatus::Pending) {
333 let line_operations = self.line_operations.clone();
334 self.reapply_line_based_diff(line_operations, cx);
335 } else {
336 self.reapply_batch_diff(cx).detach();
337 }
338 } else if let Some(transaction_id) = self.transformation_transaction_id.take() {
339 self.buffer.update(cx, |buffer, cx| {
340 buffer.undo_transaction(transaction_id, cx);
341 buffer.forget_transaction(transaction_id, cx);
342 });
343 }
344 }
345 }
346
347 fn handle_buffer_event(
348 &mut self,
349 _buffer: Entity<MultiBuffer>,
350 event: &multi_buffer::Event,
351 cx: &mut Context<Self>,
352 ) {
353 if let multi_buffer::Event::TransactionUndone { transaction_id } = event {
354 if self.transformation_transaction_id == Some(*transaction_id) {
355 self.transformation_transaction_id = None;
356 self.generation = Task::ready(());
357 cx.emit(CodegenEvent::Undone);
358 }
359 }
360 }
361
362 pub fn last_equal_ranges(&self) -> &[Range<Anchor>] {
363 &self.last_equal_ranges
364 }
365
366 pub fn start(
367 &mut self,
368 user_prompt: String,
369 model: Arc<dyn LanguageModel>,
370 cx: &mut Context<Self>,
371 ) -> Result<()> {
372 if let Some(transformation_transaction_id) = self.transformation_transaction_id.take() {
373 self.buffer.update(cx, |buffer, cx| {
374 buffer.undo_transaction(transformation_transaction_id, cx);
375 });
376 }
377
378 self.edit_position = Some(self.range.start.bias_right(&self.snapshot));
379
380 let api_key = model.api_key(cx);
381 let telemetry_id = model.telemetry_id();
382 let provider_id = model.provider_id();
383 let stream: LocalBoxFuture<Result<LanguageModelTextStream>> =
384 if user_prompt.trim().to_lowercase() == "delete" {
385 async { Ok(LanguageModelTextStream::default()) }.boxed_local()
386 } else {
387 let request = self.build_request(&model, user_prompt, cx)?;
388 cx.spawn(async move |_, cx| model.stream_completion_text(request.await, &cx).await)
389 .boxed_local()
390 };
391 self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
392 Ok(())
393 }
394
395 fn build_request(
396 &self,
397 model: &Arc<dyn LanguageModel>,
398 user_prompt: String,
399 cx: &mut App,
400 ) -> Result<Task<LanguageModelRequest>> {
401 let buffer = self.buffer.read(cx).snapshot(cx);
402 let language = buffer.language_at(self.range.start);
403 let language_name = if let Some(language) = language.as_ref() {
404 if Arc::ptr_eq(language, &language::PLAIN_TEXT) {
405 None
406 } else {
407 Some(language.name())
408 }
409 } else {
410 None
411 };
412
413 let language_name = language_name.as_ref();
414 let start = buffer.point_to_buffer_offset(self.range.start);
415 let end = buffer.point_to_buffer_offset(self.range.end);
416 let (buffer, range) = if let Some((start, end)) = start.zip(end) {
417 let (start_buffer, start_buffer_offset) = start;
418 let (end_buffer, end_buffer_offset) = end;
419 if start_buffer.remote_id() == end_buffer.remote_id() {
420 (start_buffer.clone(), start_buffer_offset..end_buffer_offset)
421 } else {
422 anyhow::bail!("invalid transformation range");
423 }
424 } else {
425 anyhow::bail!("invalid transformation range");
426 };
427
428 let prompt = self
429 .builder
430 .generate_inline_transformation_prompt(user_prompt, language_name, buffer, range)
431 .context("generating content prompt")?;
432
433 let context_task = self.context_store.as_ref().map(|context_store| {
434 if let Some(project) = self.project.upgrade() {
435 let context = context_store
436 .read(cx)
437 .context()
438 .cloned()
439 .collect::<Vec<_>>();
440 load_context(context, &project, &self.prompt_store, cx)
441 } else {
442 Task::ready(ContextLoadResult::default())
443 }
444 });
445
446 let temperature = AgentSettings::temperature_for_model(&model, cx);
447
448 Ok(cx.spawn(async move |_cx| {
449 let mut request_message = LanguageModelRequestMessage {
450 role: Role::User,
451 content: Vec::new(),
452 cache: false,
453 };
454
455 if let Some(context_task) = context_task {
456 context_task
457 .await
458 .loaded_context
459 .add_to_request_message(&mut request_message);
460 }
461
462 request_message.content.push(prompt.into());
463
464 LanguageModelRequest {
465 thread_id: None,
466 prompt_id: None,
467 mode: None,
468 tools: Vec::new(),
469 tool_choice: None,
470 stop: Vec::new(),
471 temperature,
472 messages: vec![request_message],
473 }
474 }))
475 }
476
477 pub fn handle_stream(
478 &mut self,
479 model_telemetry_id: String,
480 model_provider_id: String,
481 model_api_key: Option<String>,
482 stream: impl 'static + Future<Output = Result<LanguageModelTextStream>>,
483 cx: &mut Context<Self>,
484 ) {
485 let start_time = Instant::now();
486 let snapshot = self.snapshot.clone();
487 let selected_text = snapshot
488 .text_for_range(self.range.start..self.range.end)
489 .collect::<Rope>();
490
491 let selection_start = self.range.start.to_point(&snapshot);
492
493 // Start with the indentation of the first line in the selection
494 let mut suggested_line_indent = snapshot
495 .suggested_indents(selection_start.row..=selection_start.row, cx)
496 .into_values()
497 .next()
498 .unwrap_or_else(|| snapshot.indent_size_for_line(MultiBufferRow(selection_start.row)));
499
500 // If the first line in the selection does not have indentation, check the following lines
501 if suggested_line_indent.len == 0 && suggested_line_indent.kind == IndentKind::Space {
502 for row in selection_start.row..=self.range.end.to_point(&snapshot).row {
503 let line_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
504 // Prefer tabs if a line in the selection uses tabs as indentation
505 if line_indent.kind == IndentKind::Tab {
506 suggested_line_indent.kind = IndentKind::Tab;
507 break;
508 }
509 }
510 }
511
512 let http_client = cx.http_client();
513 let telemetry = self.telemetry.clone();
514 let language_name = {
515 let multibuffer = self.buffer.read(cx);
516 let snapshot = multibuffer.snapshot(cx);
517 let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
518 ranges
519 .first()
520 .and_then(|(buffer, _, _)| buffer.language())
521 .map(|language| language.name())
522 };
523
524 self.diff = Diff::default();
525 self.status = CodegenStatus::Pending;
526 let mut edit_start = self.range.start.to_offset(&snapshot);
527 let completion = Arc::new(Mutex::new(String::new()));
528 let completion_clone = completion.clone();
529
530 self.generation = cx.spawn(async move |codegen, cx| {
531 let stream = stream.await;
532 let token_usage = stream
533 .as_ref()
534 .ok()
535 .map(|stream| stream.last_token_usage.clone());
536 let message_id = stream
537 .as_ref()
538 .ok()
539 .and_then(|stream| stream.message_id.clone());
540 let generate = async {
541 let model_telemetry_id = model_telemetry_id.clone();
542 let model_provider_id = model_provider_id.clone();
543 let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
544 let executor = cx.background_executor().clone();
545 let message_id = message_id.clone();
546 let line_based_stream_diff: Task<anyhow::Result<()>> =
547 cx.background_spawn(async move {
548 let mut response_latency = None;
549 let request_start = Instant::now();
550 let diff = async {
551 let chunks = StripInvalidSpans::new(
552 stream?.stream.map_err(|error| error.into()),
553 );
554 futures::pin_mut!(chunks);
555 let mut diff = StreamingDiff::new(selected_text.to_string());
556 let mut line_diff = LineDiff::default();
557
558 let mut new_text = String::new();
559 let mut base_indent = None;
560 let mut line_indent = None;
561 let mut first_line = true;
562
563 while let Some(chunk) = chunks.next().await {
564 if response_latency.is_none() {
565 response_latency = Some(request_start.elapsed());
566 }
567 let chunk = chunk?;
568 completion_clone.lock().push_str(&chunk);
569
570 let mut lines = chunk.split('\n').peekable();
571 while let Some(line) = lines.next() {
572 new_text.push_str(line);
573 if line_indent.is_none() {
574 if let Some(non_whitespace_ch_ix) =
575 new_text.find(|ch: char| !ch.is_whitespace())
576 {
577 line_indent = Some(non_whitespace_ch_ix);
578 base_indent = base_indent.or(line_indent);
579
580 let line_indent = line_indent.unwrap();
581 let base_indent = base_indent.unwrap();
582 let indent_delta =
583 line_indent as i32 - base_indent as i32;
584 let mut corrected_indent_len = cmp::max(
585 0,
586 suggested_line_indent.len as i32 + indent_delta,
587 )
588 as usize;
589 if first_line {
590 corrected_indent_len = corrected_indent_len
591 .saturating_sub(
592 selection_start.column as usize,
593 );
594 }
595
596 let indent_char = suggested_line_indent.char();
597 let mut indent_buffer = [0; 4];
598 let indent_str =
599 indent_char.encode_utf8(&mut indent_buffer);
600 new_text.replace_range(
601 ..line_indent,
602 &indent_str.repeat(corrected_indent_len),
603 );
604 }
605 }
606
607 if line_indent.is_some() {
608 let char_ops = diff.push_new(&new_text);
609 line_diff.push_char_operations(&char_ops, &selected_text);
610 diff_tx
611 .send((char_ops, line_diff.line_operations()))
612 .await?;
613 new_text.clear();
614 }
615
616 if lines.peek().is_some() {
617 let char_ops = diff.push_new("\n");
618 line_diff.push_char_operations(&char_ops, &selected_text);
619 diff_tx
620 .send((char_ops, line_diff.line_operations()))
621 .await?;
622 if line_indent.is_none() {
623 // Don't write out the leading indentation in empty lines on the next line
624 // This is the case where the above if statement didn't clear the buffer
625 new_text.clear();
626 }
627 line_indent = None;
628 first_line = false;
629 }
630 }
631 }
632
633 let mut char_ops = diff.push_new(&new_text);
634 char_ops.extend(diff.finish());
635 line_diff.push_char_operations(&char_ops, &selected_text);
636 line_diff.finish(&selected_text);
637 diff_tx
638 .send((char_ops, line_diff.line_operations()))
639 .await?;
640
641 anyhow::Ok(())
642 };
643
644 let result = diff.await;
645
646 let error_message = result.as_ref().err().map(|error| error.to_string());
647 report_assistant_event(
648 AssistantEventData {
649 conversation_id: None,
650 message_id,
651 kind: AssistantKind::Inline,
652 phase: AssistantPhase::Response,
653 model: model_telemetry_id,
654 model_provider: model_provider_id,
655 response_latency,
656 error_message,
657 language_name: language_name.map(|name| name.to_proto()),
658 },
659 telemetry,
660 http_client,
661 model_api_key,
662 &executor,
663 );
664
665 result?;
666 Ok(())
667 });
668
669 while let Some((char_ops, line_ops)) = diff_rx.next().await {
670 codegen.update(cx, |codegen, cx| {
671 codegen.last_equal_ranges.clear();
672
673 let edits = char_ops
674 .into_iter()
675 .filter_map(|operation| match operation {
676 CharOperation::Insert { text } => {
677 let edit_start = snapshot.anchor_after(edit_start);
678 Some((edit_start..edit_start, text))
679 }
680 CharOperation::Delete { bytes } => {
681 let edit_end = edit_start + bytes;
682 let edit_range = snapshot.anchor_after(edit_start)
683 ..snapshot.anchor_before(edit_end);
684 edit_start = edit_end;
685 Some((edit_range, String::new()))
686 }
687 CharOperation::Keep { bytes } => {
688 let edit_end = edit_start + bytes;
689 let edit_range = snapshot.anchor_after(edit_start)
690 ..snapshot.anchor_before(edit_end);
691 edit_start = edit_end;
692 codegen.last_equal_ranges.push(edit_range);
693 None
694 }
695 })
696 .collect::<Vec<_>>();
697
698 if codegen.active {
699 codegen.apply_edits(edits.iter().cloned(), cx);
700 codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
701 }
702 codegen.edits.extend(edits);
703 codegen.line_operations = line_ops;
704 codegen.edit_position = Some(snapshot.anchor_after(edit_start));
705
706 cx.notify();
707 })?;
708 }
709
710 // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
711 // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
712 // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
713 let batch_diff_task =
714 codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
715 let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
716 line_based_stream_diff?;
717
718 anyhow::Ok(())
719 };
720
721 let result = generate.await;
722 let elapsed_time = start_time.elapsed().as_secs_f64();
723
724 codegen
725 .update(cx, |this, cx| {
726 this.message_id = message_id;
727 this.last_equal_ranges.clear();
728 if let Err(error) = result {
729 this.status = CodegenStatus::Error(error);
730 } else {
731 this.status = CodegenStatus::Done;
732 }
733 this.elapsed_time = Some(elapsed_time);
734 this.completion = Some(completion.lock().clone());
735 if let Some(usage) = token_usage {
736 let usage = usage.lock();
737 telemetry::event!(
738 "Inline Assistant Completion",
739 model = model_telemetry_id,
740 model_provider = model_provider_id,
741 input_tokens = usage.input_tokens,
742 output_tokens = usage.output_tokens,
743 )
744 }
745 cx.emit(CodegenEvent::Finished);
746 cx.notify();
747 })
748 .ok();
749 });
750 cx.notify();
751 }
752
753 pub fn stop(&mut self, cx: &mut Context<Self>) {
754 self.last_equal_ranges.clear();
755 if self.diff.is_empty() {
756 self.status = CodegenStatus::Idle;
757 } else {
758 self.status = CodegenStatus::Done;
759 }
760 self.generation = Task::ready(());
761 cx.emit(CodegenEvent::Finished);
762 cx.notify();
763 }
764
765 pub fn undo(&mut self, cx: &mut Context<Self>) {
766 self.buffer.update(cx, |buffer, cx| {
767 if let Some(transaction_id) = self.transformation_transaction_id.take() {
768 buffer.undo_transaction(transaction_id, cx);
769 buffer.refresh_preview(cx);
770 }
771 });
772 }
773
774 fn apply_edits(
775 &mut self,
776 edits: impl IntoIterator<Item = (Range<Anchor>, String)>,
777 cx: &mut Context<CodegenAlternative>,
778 ) {
779 let transaction = self.buffer.update(cx, |buffer, cx| {
780 // Avoid grouping agent edits with user edits.
781 buffer.finalize_last_transaction(cx);
782 buffer.start_transaction(cx);
783 buffer.edit(edits, None, cx);
784 buffer.end_transaction(cx)
785 });
786
787 if let Some(transaction) = transaction {
788 if let Some(first_transaction) = self.transformation_transaction_id {
789 // Group all agent edits into the first transaction.
790 self.buffer.update(cx, |buffer, cx| {
791 buffer.merge_transactions(transaction, first_transaction, cx)
792 });
793 } else {
794 self.transformation_transaction_id = Some(transaction);
795 self.buffer
796 .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
797 }
798 }
799 }
800
801 fn reapply_line_based_diff(
802 &mut self,
803 line_operations: impl IntoIterator<Item = LineOperation>,
804 cx: &mut Context<Self>,
805 ) {
806 let old_snapshot = self.snapshot.clone();
807 let old_range = self.range.to_point(&old_snapshot);
808 let new_snapshot = self.buffer.read(cx).snapshot(cx);
809 let new_range = self.range.to_point(&new_snapshot);
810
811 let mut old_row = old_range.start.row;
812 let mut new_row = new_range.start.row;
813
814 self.diff.deleted_row_ranges.clear();
815 self.diff.inserted_row_ranges.clear();
816 for operation in line_operations {
817 match operation {
818 LineOperation::Keep { lines } => {
819 old_row += lines;
820 new_row += lines;
821 }
822 LineOperation::Delete { lines } => {
823 let old_end_row = old_row + lines - 1;
824 let new_row = new_snapshot.anchor_before(Point::new(new_row, 0));
825
826 if let Some((_, last_deleted_row_range)) =
827 self.diff.deleted_row_ranges.last_mut()
828 {
829 if *last_deleted_row_range.end() + 1 == old_row {
830 *last_deleted_row_range = *last_deleted_row_range.start()..=old_end_row;
831 } else {
832 self.diff
833 .deleted_row_ranges
834 .push((new_row, old_row..=old_end_row));
835 }
836 } else {
837 self.diff
838 .deleted_row_ranges
839 .push((new_row, old_row..=old_end_row));
840 }
841
842 old_row += lines;
843 }
844 LineOperation::Insert { lines } => {
845 let new_end_row = new_row + lines - 1;
846 let start = new_snapshot.anchor_before(Point::new(new_row, 0));
847 let end = new_snapshot.anchor_before(Point::new(
848 new_end_row,
849 new_snapshot.line_len(MultiBufferRow(new_end_row)),
850 ));
851 self.diff.inserted_row_ranges.push(start..end);
852 new_row += lines;
853 }
854 }
855
856 cx.notify();
857 }
858 }
859
860 fn reapply_batch_diff(&mut self, cx: &mut Context<Self>) -> Task<()> {
861 let old_snapshot = self.snapshot.clone();
862 let old_range = self.range.to_point(&old_snapshot);
863 let new_snapshot = self.buffer.read(cx).snapshot(cx);
864 let new_range = self.range.to_point(&new_snapshot);
865
866 cx.spawn(async move |codegen, cx| {
867 let (deleted_row_ranges, inserted_row_ranges) = cx
868 .background_spawn(async move {
869 let old_text = old_snapshot
870 .text_for_range(
871 Point::new(old_range.start.row, 0)
872 ..Point::new(
873 old_range.end.row,
874 old_snapshot.line_len(MultiBufferRow(old_range.end.row)),
875 ),
876 )
877 .collect::<String>();
878 let new_text = new_snapshot
879 .text_for_range(
880 Point::new(new_range.start.row, 0)
881 ..Point::new(
882 new_range.end.row,
883 new_snapshot.line_len(MultiBufferRow(new_range.end.row)),
884 ),
885 )
886 .collect::<String>();
887
888 let old_start_row = old_range.start.row;
889 let new_start_row = new_range.start.row;
890 let mut deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)> = Vec::new();
891 let mut inserted_row_ranges = Vec::new();
892 for (old_rows, new_rows) in line_diff(&old_text, &new_text) {
893 let old_rows = old_start_row + old_rows.start..old_start_row + old_rows.end;
894 let new_rows = new_start_row + new_rows.start..new_start_row + new_rows.end;
895 if !old_rows.is_empty() {
896 deleted_row_ranges.push((
897 new_snapshot.anchor_before(Point::new(new_rows.start, 0)),
898 old_rows.start..=old_rows.end - 1,
899 ));
900 }
901 if !new_rows.is_empty() {
902 let start = new_snapshot.anchor_before(Point::new(new_rows.start, 0));
903 let new_end_row = new_rows.end - 1;
904 let end = new_snapshot.anchor_before(Point::new(
905 new_end_row,
906 new_snapshot.line_len(MultiBufferRow(new_end_row)),
907 ));
908 inserted_row_ranges.push(start..end);
909 }
910 }
911 (deleted_row_ranges, inserted_row_ranges)
912 })
913 .await;
914
915 codegen
916 .update(cx, |codegen, cx| {
917 codegen.diff.deleted_row_ranges = deleted_row_ranges;
918 codegen.diff.inserted_row_ranges = inserted_row_ranges;
919 cx.notify();
920 })
921 .ok();
922 })
923 }
924}
925
926#[derive(Copy, Clone, Debug)]
927pub enum CodegenEvent {
928 Finished,
929 Undone,
930}
931
932struct StripInvalidSpans<T> {
933 stream: T,
934 stream_done: bool,
935 buffer: String,
936 first_line: bool,
937 line_end: bool,
938 starts_with_code_block: bool,
939}
940
941impl<T> StripInvalidSpans<T>
942where
943 T: Stream<Item = Result<String>>,
944{
945 fn new(stream: T) -> Self {
946 Self {
947 stream,
948 stream_done: false,
949 buffer: String::new(),
950 first_line: true,
951 line_end: false,
952 starts_with_code_block: false,
953 }
954 }
955}
956
957impl<T> Stream for StripInvalidSpans<T>
958where
959 T: Stream<Item = Result<String>>,
960{
961 type Item = Result<String>;
962
963 fn poll_next(self: Pin<&mut Self>, cx: &mut task::Context) -> Poll<Option<Self::Item>> {
964 const CODE_BLOCK_DELIMITER: &str = "```";
965 const CURSOR_SPAN: &str = "<|CURSOR|>";
966
967 let this = unsafe { self.get_unchecked_mut() };
968 loop {
969 if !this.stream_done {
970 let mut stream = unsafe { Pin::new_unchecked(&mut this.stream) };
971 match stream.as_mut().poll_next(cx) {
972 Poll::Ready(Some(Ok(chunk))) => {
973 this.buffer.push_str(&chunk);
974 }
975 Poll::Ready(Some(Err(error))) => return Poll::Ready(Some(Err(error))),
976 Poll::Ready(None) => {
977 this.stream_done = true;
978 }
979 Poll::Pending => return Poll::Pending,
980 }
981 }
982
983 let mut chunk = String::new();
984 let mut consumed = 0;
985 if !this.buffer.is_empty() {
986 let mut lines = this.buffer.split('\n').enumerate().peekable();
987 while let Some((line_ix, line)) = lines.next() {
988 if line_ix > 0 {
989 this.first_line = false;
990 }
991
992 if this.first_line {
993 let trimmed_line = line.trim();
994 if lines.peek().is_some() {
995 if trimmed_line.starts_with(CODE_BLOCK_DELIMITER) {
996 consumed += line.len() + 1;
997 this.starts_with_code_block = true;
998 continue;
999 }
1000 } else if trimmed_line.is_empty()
1001 || prefixes(CODE_BLOCK_DELIMITER)
1002 .any(|prefix| trimmed_line.starts_with(prefix))
1003 {
1004 break;
1005 }
1006 }
1007
1008 let line_without_cursor = line.replace(CURSOR_SPAN, "");
1009 if lines.peek().is_some() {
1010 if this.line_end {
1011 chunk.push('\n');
1012 }
1013
1014 chunk.push_str(&line_without_cursor);
1015 this.line_end = true;
1016 consumed += line.len() + 1;
1017 } else if this.stream_done {
1018 if !this.starts_with_code_block
1019 || !line_without_cursor.trim().ends_with(CODE_BLOCK_DELIMITER)
1020 {
1021 if this.line_end {
1022 chunk.push('\n');
1023 }
1024
1025 chunk.push_str(&line);
1026 }
1027
1028 consumed += line.len();
1029 } else {
1030 let trimmed_line = line.trim();
1031 if trimmed_line.is_empty()
1032 || prefixes(CURSOR_SPAN).any(|prefix| trimmed_line.ends_with(prefix))
1033 || prefixes(CODE_BLOCK_DELIMITER)
1034 .any(|prefix| trimmed_line.ends_with(prefix))
1035 {
1036 break;
1037 } else {
1038 if this.line_end {
1039 chunk.push('\n');
1040 this.line_end = false;
1041 }
1042
1043 chunk.push_str(&line_without_cursor);
1044 consumed += line.len();
1045 }
1046 }
1047 }
1048 }
1049
1050 this.buffer = this.buffer.split_off(consumed);
1051 if !chunk.is_empty() {
1052 return Poll::Ready(Some(Ok(chunk)));
1053 } else if this.stream_done {
1054 return Poll::Ready(None);
1055 }
1056 }
1057 }
1058}
1059
1060fn prefixes(text: &str) -> impl Iterator<Item = &str> {
1061 (0..text.len() - 1).map(|ix| &text[..ix + 1])
1062}
1063
1064#[derive(Default)]
1065pub struct Diff {
1066 pub deleted_row_ranges: Vec<(Anchor, RangeInclusive<u32>)>,
1067 pub inserted_row_ranges: Vec<Range<Anchor>>,
1068}
1069
1070impl Diff {
1071 fn is_empty(&self) -> bool {
1072 self.deleted_row_ranges.is_empty() && self.inserted_row_ranges.is_empty()
1073 }
1074}
1075
1076#[cfg(test)]
1077mod tests {
1078 use super::*;
1079 use fs::FakeFs;
1080 use futures::{
1081 Stream,
1082 stream::{self},
1083 };
1084 use gpui::TestAppContext;
1085 use indoc::indoc;
1086 use language::{
1087 Buffer, Language, LanguageConfig, LanguageMatcher, Point, language_settings,
1088 tree_sitter_rust,
1089 };
1090 use language_model::{LanguageModelRegistry, TokenUsage};
1091 use rand::prelude::*;
1092 use serde::Serialize;
1093 use settings::SettingsStore;
1094 use std::{future, sync::Arc};
1095
1096 #[derive(Serialize)]
1097 pub struct DummyCompletionRequest {
1098 pub name: String,
1099 }
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}