1use crate::{
2 context::load_context, context_store::ContextStore, inline_prompt_editor::CodegenStatus,
3};
4use agent_settings::AgentSettings;
5use anyhow::{Context as _, Result};
6use client::telemetry::Telemetry;
7use cloud_llm_client::CompletionIntent;
8use collections::HashSet;
9use editor::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint};
10use futures::{
11 SinkExt, Stream, StreamExt, TryStreamExt as _, channel::mpsc, future::LocalBoxFuture, join,
12};
13use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Subscription, Task, WeakEntity};
14use language::{Buffer, IndentKind, Point, TransactionId, line_diff};
15use language_model::{
16 LanguageModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
17 LanguageModelTextStream, Role, report_assistant_event,
18};
19use multi_buffer::MultiBufferRow;
20use parking_lot::Mutex;
21use project::Project;
22use prompt_store::{PromptBuilder, 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 && self.transformation_transaction_id == Some(*transaction_id)
355 {
356 self.transformation_transaction_id = None;
357 self.generation = Task::ready(());
358 cx.emit(CodegenEvent::Undone);
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| {
389 Ok(model.stream_completion_text(request.await, cx).await?)
390 })
391 .boxed_local()
392 };
393 self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
394 Ok(())
395 }
396
397 fn build_request(
398 &self,
399 model: &Arc<dyn LanguageModel>,
400 user_prompt: String,
401 cx: &mut App,
402 ) -> Result<Task<LanguageModelRequest>> {
403 let buffer = self.buffer.read(cx).snapshot(cx);
404 let language = buffer.language_at(self.range.start);
405 let language_name = if let Some(language) = language.as_ref() {
406 if Arc::ptr_eq(language, &language::PLAIN_TEXT) {
407 None
408 } else {
409 Some(language.name())
410 }
411 } else {
412 None
413 };
414
415 let language_name = language_name.as_ref();
416 let start = buffer.point_to_buffer_offset(self.range.start);
417 let end = buffer.point_to_buffer_offset(self.range.end);
418 let (buffer, range) = if let Some((start, end)) = start.zip(end) {
419 let (start_buffer, start_buffer_offset) = start;
420 let (end_buffer, end_buffer_offset) = end;
421 if start_buffer.remote_id() == end_buffer.remote_id() {
422 (start_buffer.clone(), start_buffer_offset..end_buffer_offset)
423 } else {
424 anyhow::bail!("invalid transformation range");
425 }
426 } else {
427 anyhow::bail!("invalid transformation range");
428 };
429
430 let prompt = self
431 .builder
432 .generate_inline_transformation_prompt(
433 user_prompt,
434 language_name,
435 buffer,
436 range.start.0..range.end.0,
437 )
438 .context("generating content prompt")?;
439
440 let context_task = self.context_store.as_ref().and_then(|context_store| {
441 if let Some(project) = self.project.upgrade() {
442 let context = context_store
443 .read(cx)
444 .context()
445 .cloned()
446 .collect::<Vec<_>>();
447 Some(load_context(context, &project, &self.prompt_store, cx))
448 } else {
449 None
450 }
451 });
452
453 let temperature = AgentSettings::temperature_for_model(model, cx);
454
455 Ok(cx.spawn(async move |_cx| {
456 let mut request_message = LanguageModelRequestMessage {
457 role: Role::User,
458 content: Vec::new(),
459 cache: false,
460 };
461
462 if let Some(context_task) = context_task {
463 context_task
464 .await
465 .add_to_request_message(&mut request_message);
466 }
467
468 request_message.content.push(prompt.into());
469
470 LanguageModelRequest {
471 thread_id: None,
472 prompt_id: None,
473 intent: Some(CompletionIntent::InlineAssist),
474 mode: None,
475 tools: Vec::new(),
476 tool_choice: None,
477 stop: Vec::new(),
478 temperature,
479 messages: vec![request_message],
480 thinking_allowed: false,
481 }
482 }))
483 }
484
485 pub fn handle_stream(
486 &mut self,
487 model_telemetry_id: String,
488 model_provider_id: String,
489 model_api_key: Option<String>,
490 stream: impl 'static + Future<Output = Result<LanguageModelTextStream>>,
491 cx: &mut Context<Self>,
492 ) {
493 let start_time = Instant::now();
494 let snapshot = self.snapshot.clone();
495 let selected_text = snapshot
496 .text_for_range(self.range.start..self.range.end)
497 .collect::<Rope>();
498
499 let selection_start = self.range.start.to_point(&snapshot);
500
501 // Start with the indentation of the first line in the selection
502 let mut suggested_line_indent = snapshot
503 .suggested_indents(selection_start.row..=selection_start.row, cx)
504 .into_values()
505 .next()
506 .unwrap_or_else(|| snapshot.indent_size_for_line(MultiBufferRow(selection_start.row)));
507
508 // If the first line in the selection does not have indentation, check the following lines
509 if suggested_line_indent.len == 0 && suggested_line_indent.kind == IndentKind::Space {
510 for row in selection_start.row..=self.range.end.to_point(&snapshot).row {
511 let line_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
512 // Prefer tabs if a line in the selection uses tabs as indentation
513 if line_indent.kind == IndentKind::Tab {
514 suggested_line_indent.kind = IndentKind::Tab;
515 break;
516 }
517 }
518 }
519
520 let http_client = cx.http_client();
521 let telemetry = self.telemetry.clone();
522 let language_name = {
523 let multibuffer = self.buffer.read(cx);
524 let snapshot = multibuffer.snapshot(cx);
525 let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
526 ranges
527 .first()
528 .and_then(|(buffer, _, _)| buffer.language())
529 .map(|language| language.name())
530 };
531
532 self.diff = Diff::default();
533 self.status = CodegenStatus::Pending;
534 let mut edit_start = self.range.start.to_offset(&snapshot);
535 let completion = Arc::new(Mutex::new(String::new()));
536 let completion_clone = completion.clone();
537
538 self.generation = cx.spawn(async move |codegen, cx| {
539 let stream = stream.await;
540 let token_usage = stream
541 .as_ref()
542 .ok()
543 .map(|stream| stream.last_token_usage.clone());
544 let message_id = stream
545 .as_ref()
546 .ok()
547 .and_then(|stream| stream.message_id.clone());
548 let generate = async {
549 let model_telemetry_id = model_telemetry_id.clone();
550 let model_provider_id = model_provider_id.clone();
551 let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
552 let executor = cx.background_executor().clone();
553 let message_id = message_id.clone();
554 let line_based_stream_diff: Task<anyhow::Result<()>> =
555 cx.background_spawn(async move {
556 let mut response_latency = None;
557 let request_start = Instant::now();
558 let diff = async {
559 let chunks = StripInvalidSpans::new(
560 stream?.stream.map_err(|error| error.into()),
561 );
562 futures::pin_mut!(chunks);
563 let mut diff = StreamingDiff::new(selected_text.to_string());
564 let mut line_diff = LineDiff::default();
565
566 let mut new_text = String::new();
567 let mut base_indent = None;
568 let mut line_indent = None;
569 let mut first_line = true;
570
571 while let Some(chunk) = chunks.next().await {
572 if response_latency.is_none() {
573 response_latency = Some(request_start.elapsed());
574 }
575 let chunk = chunk?;
576 completion_clone.lock().push_str(&chunk);
577
578 let mut lines = chunk.split('\n').peekable();
579 while let Some(line) = lines.next() {
580 new_text.push_str(line);
581 if line_indent.is_none()
582 && let Some(non_whitespace_ch_ix) =
583 new_text.find(|ch: char| !ch.is_whitespace())
584 {
585 line_indent = Some(non_whitespace_ch_ix);
586 base_indent = base_indent.or(line_indent);
587
588 let line_indent = line_indent.unwrap();
589 let base_indent = base_indent.unwrap();
590 let indent_delta = line_indent as i32 - base_indent as i32;
591 let mut corrected_indent_len = cmp::max(
592 0,
593 suggested_line_indent.len as i32 + indent_delta,
594 )
595 as usize;
596 if first_line {
597 corrected_indent_len = corrected_indent_len
598 .saturating_sub(selection_start.column as usize);
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::{Buffer, Language, LanguageConfig, LanguageMatcher, Point, tree_sitter_rust};
1091 use language_model::{LanguageModelRegistry, TokenUsage};
1092 use rand::prelude::*;
1093 use settings::SettingsStore;
1094 use std::{future, sync::Arc};
1095
1096 #[gpui::test(iterations = 10)]
1097 async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
1098 init_test(cx);
1099
1100 let text = indoc! {"
1101 fn main() {
1102 let x = 0;
1103 for _ in 0..10 {
1104 x += 1;
1105 }
1106 }
1107 "};
1108 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1109 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1110 let range = buffer.read_with(cx, |buffer, cx| {
1111 let snapshot = buffer.snapshot(cx);
1112 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
1113 });
1114 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1115 let fs = FakeFs::new(cx.executor());
1116 let project = Project::test(fs, vec![], cx).await;
1117 let codegen = cx.new(|cx| {
1118 CodegenAlternative::new(
1119 buffer.clone(),
1120 range.clone(),
1121 true,
1122 None,
1123 project.downgrade(),
1124 None,
1125 None,
1126 prompt_builder,
1127 cx,
1128 )
1129 });
1130
1131 let chunks_tx = simulate_response_stream(&codegen, cx);
1132
1133 let mut new_text = concat!(
1134 " let mut x = 0;\n",
1135 " while x < 10 {\n",
1136 " x += 1;\n",
1137 " }",
1138 );
1139 while !new_text.is_empty() {
1140 let max_len = cmp::min(new_text.len(), 10);
1141 let len = rng.random_range(1..=max_len);
1142 let (chunk, suffix) = new_text.split_at(len);
1143 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1144 new_text = suffix;
1145 cx.background_executor.run_until_parked();
1146 }
1147 drop(chunks_tx);
1148 cx.background_executor.run_until_parked();
1149
1150 assert_eq!(
1151 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1152 indoc! {"
1153 fn main() {
1154 let mut x = 0;
1155 while x < 10 {
1156 x += 1;
1157 }
1158 }
1159 "}
1160 );
1161 }
1162
1163 #[gpui::test(iterations = 10)]
1164 async fn test_autoindent_when_generating_past_indentation(
1165 cx: &mut TestAppContext,
1166 mut rng: StdRng,
1167 ) {
1168 init_test(cx);
1169
1170 let text = indoc! {"
1171 fn main() {
1172 le
1173 }
1174 "};
1175 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1176 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1177 let range = buffer.read_with(cx, |buffer, cx| {
1178 let snapshot = buffer.snapshot(cx);
1179 snapshot.anchor_before(Point::new(1, 6))..snapshot.anchor_after(Point::new(1, 6))
1180 });
1181 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1182 let fs = FakeFs::new(cx.executor());
1183 let project = Project::test(fs, vec![], cx).await;
1184 let codegen = cx.new(|cx| {
1185 CodegenAlternative::new(
1186 buffer.clone(),
1187 range.clone(),
1188 true,
1189 None,
1190 project.downgrade(),
1191 None,
1192 None,
1193 prompt_builder,
1194 cx,
1195 )
1196 });
1197
1198 let chunks_tx = simulate_response_stream(&codegen, cx);
1199
1200 cx.background_executor.run_until_parked();
1201
1202 let mut new_text = concat!(
1203 "t mut x = 0;\n",
1204 "while x < 10 {\n",
1205 " x += 1;\n",
1206 "}", //
1207 );
1208 while !new_text.is_empty() {
1209 let max_len = cmp::min(new_text.len(), 10);
1210 let len = rng.random_range(1..=max_len);
1211 let (chunk, suffix) = new_text.split_at(len);
1212 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1213 new_text = suffix;
1214 cx.background_executor.run_until_parked();
1215 }
1216 drop(chunks_tx);
1217 cx.background_executor.run_until_parked();
1218
1219 assert_eq!(
1220 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1221 indoc! {"
1222 fn main() {
1223 let mut x = 0;
1224 while x < 10 {
1225 x += 1;
1226 }
1227 }
1228 "}
1229 );
1230 }
1231
1232 #[gpui::test(iterations = 10)]
1233 async fn test_autoindent_when_generating_before_indentation(
1234 cx: &mut TestAppContext,
1235 mut rng: StdRng,
1236 ) {
1237 init_test(cx);
1238
1239 let text = concat!(
1240 "fn main() {\n",
1241 " \n",
1242 "}\n" //
1243 );
1244 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1245 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1246 let range = buffer.read_with(cx, |buffer, cx| {
1247 let snapshot = buffer.snapshot(cx);
1248 snapshot.anchor_before(Point::new(1, 2))..snapshot.anchor_after(Point::new(1, 2))
1249 });
1250 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1251 let fs = FakeFs::new(cx.executor());
1252 let project = Project::test(fs, vec![], cx).await;
1253 let codegen = cx.new(|cx| {
1254 CodegenAlternative::new(
1255 buffer.clone(),
1256 range.clone(),
1257 true,
1258 None,
1259 project.downgrade(),
1260 None,
1261 None,
1262 prompt_builder,
1263 cx,
1264 )
1265 });
1266
1267 let chunks_tx = simulate_response_stream(&codegen, cx);
1268
1269 cx.background_executor.run_until_parked();
1270
1271 let mut new_text = concat!(
1272 "let mut x = 0;\n",
1273 "while x < 10 {\n",
1274 " x += 1;\n",
1275 "}", //
1276 );
1277 while !new_text.is_empty() {
1278 let max_len = cmp::min(new_text.len(), 10);
1279 let len = rng.random_range(1..=max_len);
1280 let (chunk, suffix) = new_text.split_at(len);
1281 chunks_tx.unbounded_send(chunk.to_string()).unwrap();
1282 new_text = suffix;
1283 cx.background_executor.run_until_parked();
1284 }
1285 drop(chunks_tx);
1286 cx.background_executor.run_until_parked();
1287
1288 assert_eq!(
1289 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1290 indoc! {"
1291 fn main() {
1292 let mut x = 0;
1293 while x < 10 {
1294 x += 1;
1295 }
1296 }
1297 "}
1298 );
1299 }
1300
1301 #[gpui::test(iterations = 10)]
1302 async fn test_autoindent_respects_tabs_in_selection(cx: &mut TestAppContext) {
1303 init_test(cx);
1304
1305 let text = indoc! {"
1306 func main() {
1307 \tx := 0
1308 \tfor i := 0; i < 10; i++ {
1309 \t\tx++
1310 \t}
1311 }
1312 "};
1313 let buffer = cx.new(|cx| Buffer::local(text, cx));
1314 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1315 let range = buffer.read_with(cx, |buffer, cx| {
1316 let snapshot = buffer.snapshot(cx);
1317 snapshot.anchor_before(Point::new(0, 0))..snapshot.anchor_after(Point::new(4, 2))
1318 });
1319 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1320 let fs = FakeFs::new(cx.executor());
1321 let project = Project::test(fs, vec![], cx).await;
1322 let codegen = cx.new(|cx| {
1323 CodegenAlternative::new(
1324 buffer.clone(),
1325 range.clone(),
1326 true,
1327 None,
1328 project.downgrade(),
1329 None,
1330 None,
1331 prompt_builder,
1332 cx,
1333 )
1334 });
1335
1336 let chunks_tx = simulate_response_stream(&codegen, cx);
1337 let new_text = concat!(
1338 "func main() {\n",
1339 "\tx := 0\n",
1340 "\tfor x < 10 {\n",
1341 "\t\tx++\n",
1342 "\t}", //
1343 );
1344 chunks_tx.unbounded_send(new_text.to_string()).unwrap();
1345 drop(chunks_tx);
1346 cx.background_executor.run_until_parked();
1347
1348 assert_eq!(
1349 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1350 indoc! {"
1351 func main() {
1352 \tx := 0
1353 \tfor x < 10 {
1354 \t\tx++
1355 \t}
1356 }
1357 "}
1358 );
1359 }
1360
1361 #[gpui::test]
1362 async fn test_inactive_codegen_alternative(cx: &mut TestAppContext) {
1363 init_test(cx);
1364
1365 let text = indoc! {"
1366 fn main() {
1367 let x = 0;
1368 }
1369 "};
1370 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
1371 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
1372 let range = buffer.read_with(cx, |buffer, cx| {
1373 let snapshot = buffer.snapshot(cx);
1374 snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(1, 14))
1375 });
1376 let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
1377 let fs = FakeFs::new(cx.executor());
1378 let project = Project::test(fs, vec![], cx).await;
1379 let codegen = cx.new(|cx| {
1380 CodegenAlternative::new(
1381 buffer.clone(),
1382 range.clone(),
1383 false,
1384 None,
1385 project.downgrade(),
1386 None,
1387 None,
1388 prompt_builder,
1389 cx,
1390 )
1391 });
1392
1393 let chunks_tx = simulate_response_stream(&codegen, cx);
1394 chunks_tx
1395 .unbounded_send("let mut x = 0;\nx += 1;".to_string())
1396 .unwrap();
1397 drop(chunks_tx);
1398 cx.run_until_parked();
1399
1400 // The codegen is inactive, so the buffer doesn't get modified.
1401 assert_eq!(
1402 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1403 text
1404 );
1405
1406 // Activating the codegen applies the changes.
1407 codegen.update(cx, |codegen, cx| codegen.set_active(true, cx));
1408 assert_eq!(
1409 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1410 indoc! {"
1411 fn main() {
1412 let mut x = 0;
1413 x += 1;
1414 }
1415 "}
1416 );
1417
1418 // Deactivating the codegen undoes the changes.
1419 codegen.update(cx, |codegen, cx| codegen.set_active(false, cx));
1420 cx.run_until_parked();
1421 assert_eq!(
1422 buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
1423 text
1424 );
1425 }
1426
1427 #[gpui::test]
1428 async fn test_strip_invalid_spans_from_codeblock() {
1429 assert_chunks("Lorem ipsum dolor", "Lorem ipsum dolor").await;
1430 assert_chunks("```\nLorem ipsum dolor", "Lorem ipsum dolor").await;
1431 assert_chunks("```\nLorem ipsum dolor\n```", "Lorem ipsum dolor").await;
1432 assert_chunks(
1433 "```html\n```js\nLorem ipsum dolor\n```\n```",
1434 "```js\nLorem ipsum dolor\n```",
1435 )
1436 .await;
1437 assert_chunks("``\nLorem ipsum dolor\n```", "``\nLorem ipsum dolor\n```").await;
1438 assert_chunks("Lorem<|CURSOR|> ipsum", "Lorem ipsum").await;
1439 assert_chunks("Lorem ipsum", "Lorem ipsum").await;
1440 assert_chunks("```\n<|CURSOR|>Lorem ipsum\n```", "Lorem ipsum").await;
1441
1442 async fn assert_chunks(text: &str, expected_text: &str) {
1443 for chunk_size in 1..=text.len() {
1444 let actual_text = StripInvalidSpans::new(chunks(text, chunk_size))
1445 .map(|chunk| chunk.unwrap())
1446 .collect::<String>()
1447 .await;
1448 assert_eq!(
1449 actual_text, expected_text,
1450 "failed to strip invalid spans, chunk size: {}",
1451 chunk_size
1452 );
1453 }
1454 }
1455
1456 fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
1457 stream::iter(
1458 text.chars()
1459 .collect::<Vec<_>>()
1460 .chunks(size)
1461 .map(|chunk| Ok(chunk.iter().collect::<String>()))
1462 .collect::<Vec<_>>(),
1463 )
1464 }
1465 }
1466
1467 fn init_test(cx: &mut TestAppContext) {
1468 cx.update(LanguageModelRegistry::test);
1469 cx.set_global(cx.update(SettingsStore::test));
1470 }
1471
1472 fn simulate_response_stream(
1473 codegen: &Entity<CodegenAlternative>,
1474 cx: &mut TestAppContext,
1475 ) -> mpsc::UnboundedSender<String> {
1476 let (chunks_tx, chunks_rx) = mpsc::unbounded();
1477 codegen.update(cx, |codegen, cx| {
1478 codegen.handle_stream(
1479 String::new(),
1480 String::new(),
1481 None,
1482 future::ready(Ok(LanguageModelTextStream {
1483 message_id: None,
1484 stream: chunks_rx.map(Ok).boxed(),
1485 last_token_usage: Arc::new(Mutex::new(TokenUsage::default())),
1486 })),
1487 cx,
1488 );
1489 });
1490 chunks_tx
1491 }
1492
1493 fn rust_lang() -> Language {
1494 Language::new(
1495 LanguageConfig {
1496 name: "Rust".into(),
1497 matcher: LanguageMatcher {
1498 path_suffixes: vec!["rs".to_string()],
1499 ..Default::default()
1500 },
1501 ..Default::default()
1502 },
1503 Some(tree_sitter_rust::LANGUAGE.into()),
1504 )
1505 .with_indents_query(
1506 r#"
1507 (call_expression) @indent
1508 (field_expression) @indent
1509 (_ "(" ")" @end) @indent
1510 (_ "{" "}" @end) @indent
1511 "#,
1512 )
1513 .unwrap()
1514 }
1515}