1use super::*;
2use buffer_diff::{DiffHunkStatus, DiffHunkStatusKind};
3use gpui::{App, TestAppContext};
4use indoc::indoc;
5use language::{Buffer, Rope};
6use parking_lot::RwLock;
7use rand::prelude::*;
8use settings::SettingsStore;
9use std::env;
10use std::time::{Duration, Instant};
11use util::RandomCharIter;
12use util::rel_path::rel_path;
13use util::test::sample_text;
14
15#[ctor::ctor]
16fn init_logger() {
17 zlog::init_test();
18}
19
20#[gpui::test]
21fn test_empty_singleton(cx: &mut App) {
22 let buffer = cx.new(|cx| Buffer::local("", cx));
23 let buffer_id = buffer.read(cx).remote_id();
24 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
25 let snapshot = multibuffer.read(cx).snapshot(cx);
26 assert_eq!(snapshot.text(), "");
27 assert_eq!(
28 snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>(),
29 [RowInfo {
30 buffer_id: Some(buffer_id),
31 buffer_row: Some(0),
32 multibuffer_row: Some(MultiBufferRow(0)),
33 diff_status: None,
34 expand_info: None,
35 wrapped_buffer_row: None,
36 }]
37 );
38}
39
40#[gpui::test]
41fn test_singleton(cx: &mut App) {
42 let buffer = cx.new(|cx| Buffer::local(sample_text(6, 6, 'a'), cx));
43 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
44
45 let snapshot = multibuffer.read(cx).snapshot(cx);
46 assert_eq!(snapshot.text(), buffer.read(cx).text());
47
48 assert_eq!(
49 snapshot
50 .row_infos(MultiBufferRow(0))
51 .map(|info| info.buffer_row)
52 .collect::<Vec<_>>(),
53 (0..buffer.read(cx).row_count())
54 .map(Some)
55 .collect::<Vec<_>>()
56 );
57 assert_consistent_line_numbers(&snapshot);
58
59 buffer.update(cx, |buffer, cx| buffer.edit([(1..3, "XXX\n")], None, cx));
60 let snapshot = multibuffer.read(cx).snapshot(cx);
61
62 assert_eq!(snapshot.text(), buffer.read(cx).text());
63 assert_eq!(
64 snapshot
65 .row_infos(MultiBufferRow(0))
66 .map(|info| info.buffer_row)
67 .collect::<Vec<_>>(),
68 (0..buffer.read(cx).row_count())
69 .map(Some)
70 .collect::<Vec<_>>()
71 );
72 assert_consistent_line_numbers(&snapshot);
73}
74
75#[gpui::test]
76fn test_remote(cx: &mut App) {
77 let host_buffer = cx.new(|cx| Buffer::local("a", cx));
78 let guest_buffer = cx.new(|cx| {
79 let state = host_buffer.read(cx).to_proto(cx);
80 let ops = cx
81 .foreground_executor()
82 .block_on(host_buffer.read(cx).serialize_ops(None, cx));
83 let mut buffer =
84 Buffer::from_proto(ReplicaId::REMOTE_SERVER, Capability::ReadWrite, state, None)
85 .unwrap();
86 buffer.apply_ops(
87 ops.into_iter()
88 .map(|op| language::proto::deserialize_operation(op).unwrap()),
89 cx,
90 );
91 buffer
92 });
93 let multibuffer = cx.new(|cx| MultiBuffer::singleton(guest_buffer.clone(), cx));
94 let snapshot = multibuffer.read(cx).snapshot(cx);
95 assert_eq!(snapshot.text(), "a");
96
97 guest_buffer.update(cx, |buffer, cx| buffer.edit([(1..1, "b")], None, cx));
98 let snapshot = multibuffer.read(cx).snapshot(cx);
99 assert_eq!(snapshot.text(), "ab");
100
101 guest_buffer.update(cx, |buffer, cx| buffer.edit([(2..2, "c")], None, cx));
102 let snapshot = multibuffer.read(cx).snapshot(cx);
103 assert_eq!(snapshot.text(), "abc");
104}
105
106#[gpui::test]
107fn test_excerpt_boundaries_and_clipping(cx: &mut App) {
108 let buffer_1 = cx.new(|cx| Buffer::local(sample_text(7, 6, 'a'), cx));
109 let buffer_2 = cx.new(|cx| Buffer::local(sample_text(7, 6, 'g'), cx));
110 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
111
112 let events = Arc::new(RwLock::new(Vec::<Event>::new()));
113 multibuffer.update(cx, |_, cx| {
114 let events = events.clone();
115 cx.subscribe(&multibuffer, move |_, _, event, _| {
116 if let Event::Edited { .. } = event {
117 events.write().push(event.clone())
118 }
119 })
120 .detach();
121 });
122
123 let subscription = multibuffer.update(cx, |multibuffer, cx| {
124 let subscription = multibuffer.subscribe();
125 multibuffer.set_excerpt_ranges_for_path(
126 PathKey::sorted(0),
127 buffer_1.clone(),
128 &buffer_1.read(cx).snapshot(),
129 vec![ExcerptRange::new(Point::new(1, 2)..Point::new(2, 5))],
130 cx,
131 );
132 assert_eq!(
133 subscription.consume().into_inner(),
134 [Edit {
135 old: MultiBufferOffset(0)..MultiBufferOffset(0),
136 new: MultiBufferOffset(0)..MultiBufferOffset(10)
137 }]
138 );
139
140 multibuffer.set_excerpt_ranges_for_path(
141 PathKey::sorted(0),
142 buffer_1.clone(),
143 &buffer_1.read(cx).snapshot(),
144 vec![
145 ExcerptRange::new(Point::new(1, 2)..Point::new(2, 5)),
146 ExcerptRange::new(Point::new(5, 3)..Point::new(6, 4)),
147 ],
148 cx,
149 );
150 multibuffer.set_excerpt_ranges_for_path(
151 PathKey::sorted(1),
152 buffer_2.clone(),
153 &buffer_2.read(cx).snapshot(),
154 vec![ExcerptRange::new(Point::new(3, 1)..Point::new(3, 3))],
155 cx,
156 );
157 assert_eq!(
158 subscription.consume().into_inner(),
159 [Edit {
160 old: MultiBufferOffset(10)..MultiBufferOffset(10),
161 new: MultiBufferOffset(10)..MultiBufferOffset(22)
162 }]
163 );
164
165 subscription
166 });
167
168 // Adding excerpts emits an edited event.
169 assert_eq!(
170 events.read().as_slice(),
171 &[
172 Event::Edited {
173 edited_buffer: None,
174 },
175 Event::Edited {
176 edited_buffer: None,
177 },
178 Event::Edited {
179 edited_buffer: None,
180 }
181 ]
182 );
183
184 let snapshot = multibuffer.read(cx).snapshot(cx);
185 assert_eq!(
186 snapshot.text(),
187 indoc!(
188 "
189 bbbb
190 ccccc
191 fff
192 gggg
193 jj"
194 ),
195 );
196 assert_eq!(
197 snapshot
198 .row_infos(MultiBufferRow(0))
199 .map(|info| info.buffer_row)
200 .collect::<Vec<_>>(),
201 [Some(1), Some(2), Some(5), Some(6), Some(3)]
202 );
203 assert_eq!(
204 snapshot
205 .row_infos(MultiBufferRow(2))
206 .map(|info| info.buffer_row)
207 .collect::<Vec<_>>(),
208 [Some(5), Some(6), Some(3)]
209 );
210 assert_eq!(
211 snapshot
212 .row_infos(MultiBufferRow(4))
213 .map(|info| info.buffer_row)
214 .collect::<Vec<_>>(),
215 [Some(3)]
216 );
217 assert!(
218 snapshot
219 .row_infos(MultiBufferRow(5))
220 .map(|info| info.buffer_row)
221 .collect::<Vec<_>>()
222 .is_empty()
223 );
224
225 assert_eq!(
226 boundaries_in_range(Point::new(0, 0)..Point::new(4, 2), &snapshot),
227 &[
228 (MultiBufferRow(0), "bbbb\nccccc".to_string(), true),
229 (MultiBufferRow(2), "fff\ngggg".to_string(), false),
230 (MultiBufferRow(4), "jj".to_string(), true),
231 ]
232 );
233 assert_eq!(
234 boundaries_in_range(Point::new(0, 0)..Point::new(2, 0), &snapshot),
235 &[(MultiBufferRow(0), "bbbb\nccccc".to_string(), true)]
236 );
237 assert_eq!(
238 boundaries_in_range(Point::new(1, 0)..Point::new(1, 5), &snapshot),
239 &[]
240 );
241 assert_eq!(
242 boundaries_in_range(Point::new(1, 0)..Point::new(2, 0), &snapshot),
243 &[]
244 );
245 assert_eq!(
246 boundaries_in_range(Point::new(1, 0)..Point::new(4, 0), &snapshot),
247 &[(MultiBufferRow(2), "fff\ngggg".to_string(), false)]
248 );
249 assert_eq!(
250 boundaries_in_range(Point::new(1, 0)..Point::new(4, 0), &snapshot),
251 &[(MultiBufferRow(2), "fff\ngggg".to_string(), false)]
252 );
253 assert_eq!(
254 boundaries_in_range(Point::new(2, 0)..Point::new(3, 0), &snapshot),
255 &[(MultiBufferRow(2), "fff\ngggg".to_string(), false)]
256 );
257 assert_eq!(
258 boundaries_in_range(Point::new(4, 0)..Point::new(4, 2), &snapshot),
259 &[(MultiBufferRow(4), "jj".to_string(), true)]
260 );
261 assert_eq!(
262 boundaries_in_range(Point::new(4, 2)..Point::new(4, 2), &snapshot),
263 &[]
264 );
265
266 buffer_1.update(cx, |buffer, cx| {
267 let text = "\n";
268 buffer.edit(
269 [
270 (Point::new(0, 0)..Point::new(0, 0), text),
271 (Point::new(2, 1)..Point::new(2, 3), text),
272 ],
273 None,
274 cx,
275 );
276 });
277
278 let snapshot = multibuffer.read(cx).snapshot(cx);
279 assert_eq!(
280 snapshot.text(),
281 concat!(
282 "bbbb\n", // Preserve newlines
283 "c\n", //
284 "cc\n", //
285 "fff\n", //
286 "gggg\n", //
287 "jj" //
288 )
289 );
290
291 assert_eq!(
292 subscription.consume().into_inner(),
293 [Edit {
294 old: MultiBufferOffset(6)..MultiBufferOffset(8),
295 new: MultiBufferOffset(6)..MultiBufferOffset(7)
296 }]
297 );
298
299 let snapshot = multibuffer.read(cx).snapshot(cx);
300 assert_eq!(
301 snapshot.clip_point(Point::new(0, 5), Bias::Left),
302 Point::new(0, 4)
303 );
304 assert_eq!(
305 snapshot.clip_point(Point::new(0, 5), Bias::Right),
306 Point::new(0, 4)
307 );
308 assert_eq!(
309 snapshot.clip_point(Point::new(5, 1), Bias::Right),
310 Point::new(5, 1)
311 );
312 assert_eq!(
313 snapshot.clip_point(Point::new(5, 2), Bias::Right),
314 Point::new(5, 2)
315 );
316 assert_eq!(
317 snapshot.clip_point(Point::new(5, 3), Bias::Right),
318 Point::new(5, 2)
319 );
320
321 let snapshot = multibuffer.update(cx, |multibuffer, cx| {
322 multibuffer.remove_excerpts(PathKey::sorted(1), cx);
323 multibuffer.snapshot(cx)
324 });
325
326 assert_eq!(
327 snapshot.text(),
328 concat!(
329 "bbbb\n", // Preserve newlines
330 "c\n", //
331 "cc\n", //
332 "fff\n", //
333 "gggg", //
334 )
335 );
336
337 fn boundaries_in_range(
338 range: Range<Point>,
339 snapshot: &MultiBufferSnapshot,
340 ) -> Vec<(MultiBufferRow, String, bool)> {
341 snapshot
342 .excerpt_boundaries_in_range(range)
343 .map(|boundary| {
344 let starts_new_buffer = boundary.starts_new_buffer();
345 (
346 boundary.row,
347 boundary
348 .next
349 .buffer
350 .text_for_range(boundary.next.range.context)
351 .collect::<String>(),
352 starts_new_buffer,
353 )
354 })
355 .collect::<Vec<_>>()
356 }
357}
358
359#[gpui::test]
360async fn test_diff_boundary_anchors(cx: &mut TestAppContext) {
361 let base_text = "one\ntwo\nthree\n";
362 let text = "one\nthree\n";
363 let buffer = cx.new(|cx| Buffer::local(text, cx));
364 let diff = cx
365 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
366 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
367 multibuffer.update(cx, |multibuffer, cx| multibuffer.add_diff(diff, cx));
368
369 let (before, after) = multibuffer.update(cx, |multibuffer, cx| {
370 let before = multibuffer.snapshot(cx).anchor_before(Point::new(1, 0));
371 let after = multibuffer.snapshot(cx).anchor_after(Point::new(1, 0));
372 multibuffer.set_all_diff_hunks_expanded(cx);
373 (before, after)
374 });
375 cx.run_until_parked();
376
377 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
378 let actual_text = snapshot.text();
379 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
380 let actual_diff = format_diff(&actual_text, &actual_row_infos, &Default::default(), None);
381 pretty_assertions::assert_eq!(
382 actual_diff,
383 indoc! {
384 " one
385 - two
386 three
387 "
388 },
389 );
390
391 multibuffer.update(cx, |multibuffer, cx| {
392 let snapshot = multibuffer.snapshot(cx);
393 assert_eq!(before.to_point(&snapshot), Point::new(1, 0));
394 assert_eq!(after.to_point(&snapshot), Point::new(2, 0));
395 assert_eq!(
396 vec![Point::new(1, 0), Point::new(2, 0),],
397 snapshot.summaries_for_anchors::<Point, _>(&[before, after]),
398 )
399 })
400}
401
402#[gpui::test]
403async fn test_diff_hunks_in_range(cx: &mut TestAppContext) {
404 let base_text = "one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\n";
405 let text = "one\nfour\nseven\n";
406 let buffer = cx.new(|cx| Buffer::local(text, cx));
407 let diff = cx
408 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
409 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
410 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
411 (multibuffer.snapshot(cx), multibuffer.subscribe())
412 });
413
414 multibuffer.update(cx, |multibuffer, cx| {
415 multibuffer.add_diff(diff, cx);
416 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
417 });
418
419 assert_new_snapshot(
420 &multibuffer,
421 &mut snapshot,
422 &mut subscription,
423 cx,
424 indoc! {
425 " one
426 - two
427 - three
428 four
429 - five
430 - six
431 seven
432 - eight
433 "
434 },
435 );
436
437 assert_eq!(
438 snapshot
439 .diff_hunks_in_range(Point::new(1, 0)..Point::MAX)
440 .map(|hunk| hunk.row_range.start.0..hunk.row_range.end.0)
441 .collect::<Vec<_>>(),
442 vec![1..3, 4..6, 7..8]
443 );
444
445 assert_eq!(snapshot.diff_hunk_before(Point::new(1, 1)), None,);
446 assert_eq!(
447 snapshot.diff_hunk_before(Point::new(7, 0)),
448 Some(MultiBufferRow(4))
449 );
450 assert_eq!(
451 snapshot.diff_hunk_before(Point::new(4, 0)),
452 Some(MultiBufferRow(1))
453 );
454
455 multibuffer.update(cx, |multibuffer, cx| {
456 multibuffer.collapse_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
457 });
458
459 assert_new_snapshot(
460 &multibuffer,
461 &mut snapshot,
462 &mut subscription,
463 cx,
464 indoc! {
465 "
466 one
467 four
468 seven
469 "
470 },
471 );
472
473 assert_eq!(
474 snapshot.diff_hunk_before(Point::new(2, 0)),
475 Some(MultiBufferRow(1)),
476 );
477 assert_eq!(
478 snapshot.diff_hunk_before(Point::new(4, 0)),
479 Some(MultiBufferRow(2))
480 );
481}
482
483#[gpui::test]
484async fn test_diff_hunks_in_range_query_starting_at_added_row(cx: &mut TestAppContext) {
485 let base_text = "one\ntwo\nthree\n";
486 let text = "one\nTWO\nthree\n";
487 let buffer = cx.new(|cx| Buffer::local(text, cx));
488 let diff = cx
489 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
490 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
491 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
492 (multibuffer.snapshot(cx), multibuffer.subscribe())
493 });
494
495 multibuffer.update(cx, |multibuffer, cx| {
496 multibuffer.add_diff(diff, cx);
497 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
498 });
499
500 assert_new_snapshot(
501 &multibuffer,
502 &mut snapshot,
503 &mut subscription,
504 cx,
505 indoc! {
506 " one
507 - two
508 + TWO
509 three
510 "
511 },
512 );
513
514 assert_eq!(
515 snapshot
516 .diff_hunks_in_range(Point::new(2, 0)..Point::MAX)
517 .map(|hunk| hunk.row_range.start.0..hunk.row_range.end.0)
518 .collect::<Vec<_>>(),
519 vec![1..3],
520 "querying starting at the added row should still return the full hunk including deleted lines"
521 );
522}
523
524#[gpui::test]
525async fn test_inverted_diff_hunks_in_range(cx: &mut TestAppContext) {
526 let base_text = "one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\n";
527 let text = "ZERO\none\nTHREE\nfour\nseven\nEIGHT\nNINE\n";
528 let buffer = cx.new(|cx| Buffer::local(text, cx));
529 let diff = cx
530 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
531 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
532 let multibuffer = cx.new(|cx| MultiBuffer::singleton(base_text_buffer.clone(), cx));
533 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
534 (multibuffer.snapshot(cx), multibuffer.subscribe())
535 });
536
537 multibuffer.update(cx, |multibuffer, cx| {
538 multibuffer.add_inverted_diff(diff, buffer.clone(), cx);
539 });
540
541 assert_new_snapshot(
542 &multibuffer,
543 &mut snapshot,
544 &mut subscription,
545 cx,
546 indoc! {
547 " one
548 - two
549 - three
550 four
551 - five
552 - six
553 seven
554 - eight
555 "
556 },
557 );
558
559 assert_eq!(
560 snapshot
561 .diff_hunks_in_range(Point::new(0, 0)..Point::MAX)
562 .map(|hunk| hunk.row_range.start.0..hunk.row_range.end.0)
563 .collect::<Vec<_>>(),
564 vec![0..0, 1..3, 4..6, 7..8]
565 );
566
567 assert_eq!(
568 snapshot.diff_hunk_before(Point::new(1, 1)),
569 Some(MultiBufferRow(0))
570 );
571 assert_eq!(
572 snapshot.diff_hunk_before(Point::new(7, 0)),
573 Some(MultiBufferRow(4))
574 );
575 assert_eq!(
576 snapshot.diff_hunk_before(Point::new(4, 0)),
577 Some(MultiBufferRow(1))
578 );
579}
580
581#[gpui::test]
582async fn test_editing_text_in_diff_hunks(cx: &mut TestAppContext) {
583 let base_text = "one\ntwo\nfour\nfive\nsix\nseven\n";
584 let text = "one\ntwo\nTHREE\nfour\nfive\nseven\n";
585 let buffer = cx.new(|cx| Buffer::local(text, cx));
586 let diff = cx
587 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
588 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
589
590 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
591 multibuffer.add_diff(diff.clone(), cx);
592 (multibuffer.snapshot(cx), multibuffer.subscribe())
593 });
594
595 cx.executor().run_until_parked();
596 multibuffer.update(cx, |multibuffer, cx| {
597 multibuffer.set_all_diff_hunks_expanded(cx);
598 });
599
600 assert_new_snapshot(
601 &multibuffer,
602 &mut snapshot,
603 &mut subscription,
604 cx,
605 indoc! {
606 "
607 one
608 two
609 + THREE
610 four
611 five
612 - six
613 seven
614 "
615 },
616 );
617
618 // Insert a newline within an insertion hunk
619 multibuffer.update(cx, |multibuffer, cx| {
620 multibuffer.edit([(Point::new(2, 0)..Point::new(2, 0), "__\n__")], None, cx);
621 });
622 assert_new_snapshot(
623 &multibuffer,
624 &mut snapshot,
625 &mut subscription,
626 cx,
627 indoc! {
628 "
629 one
630 two
631 + __
632 + __THREE
633 four
634 five
635 - six
636 seven
637 "
638 },
639 );
640
641 // Delete the newline before a deleted hunk.
642 multibuffer.update(cx, |multibuffer, cx| {
643 multibuffer.edit([(Point::new(5, 4)..Point::new(6, 0), "")], None, cx);
644 });
645 assert_new_snapshot(
646 &multibuffer,
647 &mut snapshot,
648 &mut subscription,
649 cx,
650 indoc! {
651 "
652 one
653 two
654 + __
655 + __THREE
656 four
657 fiveseven
658 "
659 },
660 );
661
662 multibuffer.update(cx, |multibuffer, cx| multibuffer.undo(cx));
663 assert_new_snapshot(
664 &multibuffer,
665 &mut snapshot,
666 &mut subscription,
667 cx,
668 indoc! {
669 "
670 one
671 two
672 + __
673 + __THREE
674 four
675 five
676 - six
677 seven
678 "
679 },
680 );
681
682 // Cannot (yet) insert at the beginning of a deleted hunk.
683 // (because it would put the newline in the wrong place)
684 multibuffer.update(cx, |multibuffer, cx| {
685 multibuffer.edit([(Point::new(6, 0)..Point::new(6, 0), "\n")], None, cx);
686 });
687 assert_new_snapshot(
688 &multibuffer,
689 &mut snapshot,
690 &mut subscription,
691 cx,
692 indoc! {
693 "
694 one
695 two
696 + __
697 + __THREE
698 four
699 five
700 - six
701 seven
702 "
703 },
704 );
705
706 // Replace a range that ends in a deleted hunk.
707 multibuffer.update(cx, |multibuffer, cx| {
708 multibuffer.edit([(Point::new(5, 2)..Point::new(6, 2), "fty-")], None, cx);
709 });
710 assert_new_snapshot(
711 &multibuffer,
712 &mut snapshot,
713 &mut subscription,
714 cx,
715 indoc! {
716 "
717 one
718 two
719 + __
720 + __THREE
721 four
722 fifty-seven
723 "
724 },
725 );
726}
727
728#[gpui::test]
729fn test_excerpt_events(cx: &mut App) {
730 let buffer_1 = cx.new(|cx| Buffer::local(sample_text(10, 3, 'a'), cx));
731 let buffer_2 = cx.new(|cx| Buffer::local(sample_text(10, 3, 'm'), cx));
732
733 let leader_multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
734 let follower_multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
735 let follower_edit_event_count = Arc::new(RwLock::new(0));
736
737 follower_multibuffer.update(cx, |_, cx| {
738 let follower_edit_event_count = follower_edit_event_count.clone();
739 cx.subscribe(
740 &leader_multibuffer,
741 move |follower, _, event, cx| match event.clone() {
742 Event::BufferUpdated {
743 buffer,
744 path_key,
745 ranges,
746 } => {
747 let buffer_snapshot = buffer.read(cx).snapshot();
748 follower.set_merged_excerpt_ranges_for_path(
749 path_key,
750 buffer,
751 &buffer_snapshot,
752 ranges,
753 cx,
754 );
755 }
756 Event::BuffersRemoved {
757 removed_buffer_ids, ..
758 } => {
759 for id in removed_buffer_ids {
760 follower.remove_excerpts_for_buffer(id, cx);
761 }
762 }
763 Event::Edited { .. } => {
764 *follower_edit_event_count.write() += 1;
765 }
766 _ => {}
767 },
768 )
769 .detach();
770 });
771
772 let buffer_1_snapshot = buffer_1.read(cx).snapshot();
773 let buffer_2_snapshot = buffer_2.read(cx).snapshot();
774 leader_multibuffer.update(cx, |leader, cx| {
775 leader.set_excerpt_ranges_for_path(
776 PathKey::sorted(0),
777 buffer_1.clone(),
778 &buffer_1_snapshot,
779 vec![
780 ExcerptRange::new((0..8).to_point(&buffer_1_snapshot)),
781 ExcerptRange::new((22..26).to_point(&buffer_1_snapshot)),
782 ],
783 cx,
784 );
785 leader.set_excerpt_ranges_for_path(
786 PathKey::sorted(1),
787 buffer_2.clone(),
788 &buffer_2_snapshot,
789 vec![
790 ExcerptRange::new((0..5).to_point(&buffer_2_snapshot)),
791 ExcerptRange::new((20..25).to_point(&buffer_2_snapshot)),
792 ],
793 cx,
794 );
795 });
796 assert_eq!(
797 leader_multibuffer.read(cx).snapshot(cx).text(),
798 follower_multibuffer.read(cx).snapshot(cx).text(),
799 );
800 assert_eq!(*follower_edit_event_count.read(), 2);
801
802 leader_multibuffer.update(cx, |leader, cx| {
803 leader.set_excerpt_ranges_for_path(
804 PathKey::sorted(0),
805 buffer_1.clone(),
806 &buffer_1_snapshot,
807 vec![ExcerptRange::new((0..8).to_point(&buffer_1_snapshot))],
808 cx,
809 );
810 leader.set_excerpt_ranges_for_path(
811 PathKey::sorted(1),
812 buffer_2,
813 &buffer_2_snapshot,
814 vec![ExcerptRange::new((0..5).to_point(&buffer_2_snapshot))],
815 cx,
816 );
817 });
818 assert_eq!(
819 leader_multibuffer.read(cx).snapshot(cx).text(),
820 follower_multibuffer.read(cx).snapshot(cx).text(),
821 );
822 assert_eq!(*follower_edit_event_count.read(), 4);
823
824 leader_multibuffer.update(cx, |leader, cx| {
825 leader.clear(cx);
826 });
827 assert_eq!(
828 leader_multibuffer.read(cx).snapshot(cx).text(),
829 follower_multibuffer.read(cx).snapshot(cx).text(),
830 );
831 assert_eq!(*follower_edit_event_count.read(), 5);
832}
833
834#[gpui::test]
835fn test_expand_excerpts(cx: &mut App) {
836 let buffer = cx.new(|cx| Buffer::local(sample_text(20, 3, 'a'), cx));
837 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
838
839 multibuffer.update(cx, |multibuffer, cx| {
840 multibuffer.set_excerpts_for_path(
841 PathKey::for_buffer(&buffer, cx),
842 buffer,
843 vec![
844 // Note that in this test, this first excerpt
845 // does not contain a new line
846 Point::new(3, 2)..Point::new(3, 3),
847 Point::new(7, 1)..Point::new(7, 3),
848 Point::new(15, 0)..Point::new(15, 0),
849 ],
850 1,
851 cx,
852 )
853 });
854
855 let snapshot = multibuffer.read(cx).snapshot(cx);
856
857 assert_eq!(
858 snapshot.text(),
859 concat!(
860 "ccc\n", //
861 "ddd\n", //
862 "eee", //
863 "\n", // End of excerpt
864 "ggg\n", //
865 "hhh\n", //
866 "iii", //
867 "\n", // End of excerpt
868 "ooo\n", //
869 "ppp\n", //
870 "qqq", // End of excerpt
871 )
872 );
873 drop(snapshot);
874
875 multibuffer.update(cx, |multibuffer, cx| {
876 let line_zero = multibuffer.snapshot(cx).anchor_before(Point::new(0, 0));
877
878 multibuffer.expand_excerpts(
879 multibuffer
880 .snapshot(cx)
881 .excerpts()
882 .map(|(_, info)| Anchor::in_buffer(info.path_key_index, info.range.end)),
883 1,
884 ExpandExcerptDirection::UpAndDown,
885 cx,
886 );
887 let snapshot = multibuffer.snapshot(cx);
888 let line_two = snapshot.anchor_before(Point::new(2, 0));
889 assert_eq!(line_two.cmp(&line_zero, &snapshot), cmp::Ordering::Greater);
890 });
891
892 let snapshot = multibuffer.read(cx).snapshot(cx);
893
894 assert_eq!(
895 snapshot.text(),
896 concat!(
897 "bbb\n", //
898 "ccc\n", //
899 "ddd\n", //
900 "eee\n", //
901 "fff\n", //
902 "ggg\n", //
903 "hhh\n", //
904 "iii\n", //
905 "jjj\n", // End of excerpt
906 "nnn\n", //
907 "ooo\n", //
908 "ppp\n", //
909 "qqq\n", //
910 "rrr", // End of excerpt
911 )
912 );
913}
914
915#[gpui::test(iterations = 100)]
916async fn test_set_anchored_excerpts_for_path(cx: &mut TestAppContext) {
917 let buffer_1 = cx.new(|cx| Buffer::local(sample_text(20, 3, 'a'), cx));
918 let buffer_2 = cx.new(|cx| Buffer::local(sample_text(15, 4, 'a'), cx));
919 let snapshot_1 = buffer_1.update(cx, |buffer, _| buffer.snapshot());
920 let snapshot_2 = buffer_2.update(cx, |buffer, _| buffer.snapshot());
921 let ranges_1 = vec![
922 snapshot_1.anchor_before(Point::new(3, 2))..snapshot_1.anchor_before(Point::new(4, 2)),
923 snapshot_1.anchor_before(Point::new(7, 1))..snapshot_1.anchor_before(Point::new(7, 3)),
924 snapshot_1.anchor_before(Point::new(15, 0))..snapshot_1.anchor_before(Point::new(15, 0)),
925 ];
926 let ranges_2 = vec![
927 snapshot_2.anchor_before(Point::new(2, 1))..snapshot_2.anchor_before(Point::new(3, 1)),
928 snapshot_2.anchor_before(Point::new(10, 0))..snapshot_2.anchor_before(Point::new(10, 2)),
929 ];
930
931 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
932 let anchor_ranges_1 = multibuffer
933 .update(cx, |multibuffer, cx| {
934 multibuffer.set_anchored_excerpts_for_path(
935 PathKey::for_buffer(&buffer_1, cx),
936 buffer_1.clone(),
937 ranges_1,
938 2,
939 cx,
940 )
941 })
942 .await;
943 let snapshot_1 = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
944 assert_eq!(
945 anchor_ranges_1
946 .iter()
947 .map(|range| range.to_point(&snapshot_1))
948 .collect::<Vec<_>>(),
949 vec![
950 Point::new(2, 2)..Point::new(3, 2),
951 Point::new(6, 1)..Point::new(6, 3),
952 Point::new(11, 0)..Point::new(11, 0),
953 ]
954 );
955 let anchor_ranges_2 = multibuffer
956 .update(cx, |multibuffer, cx| {
957 multibuffer.set_anchored_excerpts_for_path(
958 PathKey::for_buffer(&buffer_2, cx),
959 buffer_2.clone(),
960 ranges_2,
961 2,
962 cx,
963 )
964 })
965 .await;
966 let snapshot_2 = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
967 assert_eq!(
968 anchor_ranges_2
969 .iter()
970 .map(|range| range.to_point(&snapshot_2))
971 .collect::<Vec<_>>(),
972 vec![
973 Point::new(16, 1)..Point::new(17, 1),
974 Point::new(22, 0)..Point::new(22, 2)
975 ]
976 );
977
978 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
979 assert_eq!(
980 snapshot.text(),
981 concat!(
982 "bbb\n", // buffer_1
983 "ccc\n", //
984 "ddd\n", // <-- excerpt 1
985 "eee\n", // <-- excerpt 1
986 "fff\n", //
987 "ggg\n", //
988 "hhh\n", // <-- excerpt 2
989 "iii\n", //
990 "jjj\n", //
991 //
992 "nnn\n", //
993 "ooo\n", //
994 "ppp\n", // <-- excerpt 3
995 "qqq\n", //
996 "rrr\n", //
997 //
998 "aaaa\n", // buffer 2
999 "bbbb\n", //
1000 "cccc\n", // <-- excerpt 4
1001 "dddd\n", // <-- excerpt 4
1002 "eeee\n", //
1003 "ffff\n", //
1004 //
1005 "iiii\n", //
1006 "jjjj\n", //
1007 "kkkk\n", // <-- excerpt 5
1008 "llll\n", //
1009 "mmmm", //
1010 )
1011 );
1012}
1013
1014#[gpui::test]
1015fn test_empty_multibuffer(cx: &mut App) {
1016 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
1017
1018 let snapshot = multibuffer.read(cx).snapshot(cx);
1019 assert_eq!(snapshot.text(), "");
1020 assert_eq!(
1021 snapshot
1022 .row_infos(MultiBufferRow(0))
1023 .map(|info| info.buffer_row)
1024 .collect::<Vec<_>>(),
1025 &[Some(0)]
1026 );
1027 assert!(
1028 snapshot
1029 .row_infos(MultiBufferRow(1))
1030 .map(|info| info.buffer_row)
1031 .collect::<Vec<_>>()
1032 .is_empty(),
1033 );
1034}
1035
1036#[gpui::test]
1037async fn test_empty_diff_excerpt(cx: &mut TestAppContext) {
1038 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
1039 let buffer = cx.new(|cx| Buffer::local("", cx));
1040 let base_text = "a\nb\nc";
1041
1042 let diff = cx
1043 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
1044 multibuffer.update(cx, |multibuffer, cx| {
1045 multibuffer.set_excerpt_ranges_for_path(
1046 PathKey::sorted(0),
1047 buffer.clone(),
1048 &buffer.read(cx).snapshot(),
1049 vec![ExcerptRange::new(Point::zero()..Point::zero())],
1050 cx,
1051 );
1052 multibuffer.set_all_diff_hunks_expanded(cx);
1053 multibuffer.add_diff(diff.clone(), cx);
1054 });
1055 cx.run_until_parked();
1056
1057 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
1058 assert_eq!(snapshot.text(), "a\nb\nc\n");
1059
1060 let hunk = snapshot
1061 .diff_hunks_in_range(Point::new(1, 1)..Point::new(1, 1))
1062 .next()
1063 .unwrap();
1064
1065 assert_eq!(hunk.diff_base_byte_range.start, BufferOffset(0));
1066
1067 let buf2 = cx.new(|cx| Buffer::local("X", cx));
1068 multibuffer.update(cx, |multibuffer, cx| {
1069 multibuffer.set_excerpts_for_path(
1070 PathKey::sorted(1),
1071 buf2,
1072 [Point::new(0, 0)..Point::new(0, 1)],
1073 0,
1074 cx,
1075 );
1076 });
1077
1078 buffer.update(cx, |buffer, cx| {
1079 buffer.edit([(0..0, "a\nb\nc")], None, cx);
1080 diff.update(cx, |diff, cx| {
1081 diff.recalculate_diff_sync(&buffer.text_snapshot(), cx);
1082 });
1083 assert_eq!(buffer.text(), "a\nb\nc")
1084 });
1085 cx.run_until_parked();
1086
1087 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
1088 assert_eq!(snapshot.text(), "a\nb\nc\nX");
1089
1090 buffer.update(cx, |buffer, cx| {
1091 buffer.undo(cx);
1092 diff.update(cx, |diff, cx| {
1093 diff.recalculate_diff_sync(&buffer.text_snapshot(), cx);
1094 });
1095 assert_eq!(buffer.text(), "")
1096 });
1097 cx.run_until_parked();
1098
1099 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
1100 assert_eq!(snapshot.text(), "a\nb\nc\n\nX");
1101}
1102
1103#[gpui::test]
1104fn test_singleton_multibuffer_anchors(cx: &mut App) {
1105 let buffer = cx.new(|cx| Buffer::local("abcd", cx));
1106 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
1107 let old_snapshot = multibuffer.read(cx).snapshot(cx);
1108 buffer.update(cx, |buffer, cx| {
1109 buffer.edit([(0..0, "X")], None, cx);
1110 buffer.edit([(5..5, "Y")], None, cx);
1111 });
1112 let new_snapshot = multibuffer.read(cx).snapshot(cx);
1113
1114 assert_eq!(old_snapshot.text(), "abcd");
1115 assert_eq!(new_snapshot.text(), "XabcdY");
1116
1117 assert_eq!(
1118 old_snapshot
1119 .anchor_before(MultiBufferOffset(0))
1120 .to_offset(&new_snapshot),
1121 MultiBufferOffset(0)
1122 );
1123 assert_eq!(
1124 old_snapshot
1125 .anchor_after(MultiBufferOffset(0))
1126 .to_offset(&new_snapshot),
1127 MultiBufferOffset(1)
1128 );
1129 assert_eq!(
1130 old_snapshot
1131 .anchor_before(MultiBufferOffset(4))
1132 .to_offset(&new_snapshot),
1133 MultiBufferOffset(5)
1134 );
1135 assert_eq!(
1136 old_snapshot
1137 .anchor_after(MultiBufferOffset(4))
1138 .to_offset(&new_snapshot),
1139 MultiBufferOffset(6)
1140 );
1141}
1142
1143#[gpui::test]
1144fn test_multibuffer_anchors(cx: &mut App) {
1145 let buffer_1 = cx.new(|cx| Buffer::local("abcd", cx));
1146 let buffer_2 = cx.new(|cx| Buffer::local("efghi", cx));
1147 let multibuffer = cx.new(|cx| {
1148 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
1149 multibuffer.set_excerpts_for_path(
1150 PathKey::sorted(0),
1151 buffer_1.clone(),
1152 [Point::new(0, 0)..Point::new(0, 4)],
1153 0,
1154 cx,
1155 );
1156 multibuffer.set_excerpts_for_path(
1157 PathKey::sorted(1),
1158 buffer_2.clone(),
1159 [Point::new(0, 0)..Point::new(0, 5)],
1160 0,
1161 cx,
1162 );
1163 multibuffer
1164 });
1165 let old_snapshot = multibuffer.read(cx).snapshot(cx);
1166
1167 assert_eq!(
1168 old_snapshot
1169 .anchor_before(MultiBufferOffset(0))
1170 .to_offset(&old_snapshot),
1171 MultiBufferOffset(0)
1172 );
1173 assert_eq!(
1174 old_snapshot
1175 .anchor_after(MultiBufferOffset(0))
1176 .to_offset(&old_snapshot),
1177 MultiBufferOffset(0)
1178 );
1179 assert_eq!(Anchor::min().to_offset(&old_snapshot), MultiBufferOffset(0));
1180 assert_eq!(Anchor::min().to_offset(&old_snapshot), MultiBufferOffset(0));
1181 assert_eq!(
1182 Anchor::max().to_offset(&old_snapshot),
1183 MultiBufferOffset(10)
1184 );
1185 assert_eq!(
1186 Anchor::max().to_offset(&old_snapshot),
1187 MultiBufferOffset(10)
1188 );
1189
1190 buffer_1.update(cx, |buffer, cx| {
1191 buffer.edit([(0..0, "W")], None, cx);
1192 buffer.edit([(5..5, "X")], None, cx);
1193 });
1194 buffer_2.update(cx, |buffer, cx| {
1195 buffer.edit([(0..0, "Y")], None, cx);
1196 buffer.edit([(6..6, "Z")], None, cx);
1197 });
1198 let new_snapshot = multibuffer.read(cx).snapshot(cx);
1199
1200 assert_eq!(old_snapshot.text(), "abcd\nefghi");
1201 assert_eq!(new_snapshot.text(), "WabcdX\nYefghiZ");
1202
1203 assert_eq!(
1204 old_snapshot
1205 .anchor_before(MultiBufferOffset(0))
1206 .to_offset(&new_snapshot),
1207 MultiBufferOffset(0)
1208 );
1209 assert_eq!(
1210 old_snapshot
1211 .anchor_after(MultiBufferOffset(0))
1212 .to_offset(&new_snapshot),
1213 MultiBufferOffset(1)
1214 );
1215 assert_eq!(
1216 old_snapshot
1217 .anchor_before(MultiBufferOffset(1))
1218 .to_offset(&new_snapshot),
1219 MultiBufferOffset(2)
1220 );
1221 assert_eq!(
1222 old_snapshot
1223 .anchor_after(MultiBufferOffset(1))
1224 .to_offset(&new_snapshot),
1225 MultiBufferOffset(2)
1226 );
1227 assert_eq!(
1228 old_snapshot
1229 .anchor_before(MultiBufferOffset(2))
1230 .to_offset(&new_snapshot),
1231 MultiBufferOffset(3)
1232 );
1233 assert_eq!(
1234 old_snapshot
1235 .anchor_after(MultiBufferOffset(2))
1236 .to_offset(&new_snapshot),
1237 MultiBufferOffset(3)
1238 );
1239 assert_eq!(
1240 old_snapshot
1241 .anchor_before(MultiBufferOffset(5))
1242 .to_offset(&new_snapshot),
1243 MultiBufferOffset(7)
1244 );
1245 assert_eq!(
1246 old_snapshot
1247 .anchor_after(MultiBufferOffset(5))
1248 .to_offset(&new_snapshot),
1249 MultiBufferOffset(8)
1250 );
1251 assert_eq!(
1252 old_snapshot
1253 .anchor_before(MultiBufferOffset(10))
1254 .to_offset(&new_snapshot),
1255 MultiBufferOffset(13)
1256 );
1257 assert_eq!(
1258 old_snapshot
1259 .anchor_after(MultiBufferOffset(10))
1260 .to_offset(&new_snapshot),
1261 MultiBufferOffset(14)
1262 );
1263}
1264
1265#[gpui::test]
1266async fn test_basic_diff_hunks(cx: &mut TestAppContext) {
1267 let text = indoc!(
1268 "
1269 ZERO
1270 one
1271 TWO
1272 three
1273 six
1274 "
1275 );
1276 let base_text = indoc!(
1277 "
1278 one
1279 two
1280 three
1281 four
1282 five
1283 six
1284 "
1285 );
1286
1287 let buffer = cx.new(|cx| Buffer::local(text, cx));
1288 let diff = cx
1289 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
1290 cx.run_until_parked();
1291
1292 let multibuffer = cx.new(|cx| {
1293 let mut multibuffer = MultiBuffer::singleton(buffer.clone(), cx);
1294 multibuffer.add_diff(diff.clone(), cx);
1295 multibuffer
1296 });
1297
1298 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
1299 (multibuffer.snapshot(cx), multibuffer.subscribe())
1300 });
1301 assert_eq!(
1302 snapshot.text(),
1303 indoc!(
1304 "
1305 ZERO
1306 one
1307 TWO
1308 three
1309 six
1310 "
1311 ),
1312 );
1313
1314 multibuffer.update(cx, |multibuffer, cx| {
1315 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
1316 });
1317
1318 assert_new_snapshot(
1319 &multibuffer,
1320 &mut snapshot,
1321 &mut subscription,
1322 cx,
1323 indoc!(
1324 "
1325 + ZERO
1326 one
1327 - two
1328 + TWO
1329 three
1330 - four
1331 - five
1332 six
1333 "
1334 ),
1335 );
1336
1337 assert_eq!(
1338 snapshot
1339 .row_infos(MultiBufferRow(0))
1340 .map(|info| (info.buffer_row, info.diff_status))
1341 .collect::<Vec<_>>(),
1342 vec![
1343 (Some(0), Some(DiffHunkStatus::added_none())),
1344 (Some(1), None),
1345 (Some(1), Some(DiffHunkStatus::deleted_none())),
1346 (Some(2), Some(DiffHunkStatus::added_none())),
1347 (Some(3), None),
1348 (Some(3), Some(DiffHunkStatus::deleted_none())),
1349 (Some(4), Some(DiffHunkStatus::deleted_none())),
1350 (Some(4), None),
1351 (Some(5), None)
1352 ]
1353 );
1354
1355 assert_chunks_in_ranges(&snapshot);
1356 assert_consistent_line_numbers(&snapshot);
1357 assert_position_translation(&snapshot);
1358 assert_line_indents(&snapshot);
1359
1360 multibuffer.update(cx, |multibuffer, cx| {
1361 multibuffer.collapse_diff_hunks(vec![Anchor::min()..Anchor::max()], cx)
1362 });
1363 assert_new_snapshot(
1364 &multibuffer,
1365 &mut snapshot,
1366 &mut subscription,
1367 cx,
1368 indoc!(
1369 "
1370 ZERO
1371 one
1372 TWO
1373 three
1374 six
1375 "
1376 ),
1377 );
1378
1379 assert_chunks_in_ranges(&snapshot);
1380 assert_consistent_line_numbers(&snapshot);
1381 assert_position_translation(&snapshot);
1382 assert_line_indents(&snapshot);
1383
1384 // Expand the first diff hunk
1385 multibuffer.update(cx, |multibuffer, cx| {
1386 let position = multibuffer.read(cx).anchor_before(Point::new(2, 2));
1387 multibuffer.expand_diff_hunks(vec![position..position], cx)
1388 });
1389 assert_new_snapshot(
1390 &multibuffer,
1391 &mut snapshot,
1392 &mut subscription,
1393 cx,
1394 indoc!(
1395 "
1396 ZERO
1397 one
1398 - two
1399 + TWO
1400 three
1401 six
1402 "
1403 ),
1404 );
1405
1406 // Expand the second diff hunk
1407 multibuffer.update(cx, |multibuffer, cx| {
1408 let start = multibuffer.read(cx).anchor_before(Point::new(4, 0));
1409 let end = multibuffer.read(cx).anchor_before(Point::new(5, 0));
1410 multibuffer.expand_diff_hunks(vec![start..end], cx)
1411 });
1412 assert_new_snapshot(
1413 &multibuffer,
1414 &mut snapshot,
1415 &mut subscription,
1416 cx,
1417 indoc!(
1418 "
1419 ZERO
1420 one
1421 - two
1422 + TWO
1423 three
1424 - four
1425 - five
1426 six
1427 "
1428 ),
1429 );
1430
1431 assert_chunks_in_ranges(&snapshot);
1432 assert_consistent_line_numbers(&snapshot);
1433 assert_position_translation(&snapshot);
1434 assert_line_indents(&snapshot);
1435
1436 // Edit the buffer before the first hunk
1437 buffer.update(cx, |buffer, cx| {
1438 buffer.edit_via_marked_text(
1439 indoc!(
1440 "
1441 ZERO
1442 one« hundred
1443 thousand»
1444 TWO
1445 three
1446 six
1447 "
1448 ),
1449 None,
1450 cx,
1451 );
1452 });
1453 assert_new_snapshot(
1454 &multibuffer,
1455 &mut snapshot,
1456 &mut subscription,
1457 cx,
1458 indoc!(
1459 "
1460 ZERO
1461 one hundred
1462 thousand
1463 - two
1464 + TWO
1465 three
1466 - four
1467 - five
1468 six
1469 "
1470 ),
1471 );
1472
1473 assert_chunks_in_ranges(&snapshot);
1474 assert_consistent_line_numbers(&snapshot);
1475 assert_position_translation(&snapshot);
1476 assert_line_indents(&snapshot);
1477
1478 // Recalculate the diff, changing the first diff hunk.
1479 diff.update(cx, |diff, cx| {
1480 diff.recalculate_diff_sync(&buffer.read(cx).text_snapshot(), cx);
1481 });
1482 cx.run_until_parked();
1483 assert_new_snapshot(
1484 &multibuffer,
1485 &mut snapshot,
1486 &mut subscription,
1487 cx,
1488 indoc!(
1489 "
1490 ZERO
1491 one hundred
1492 thousand
1493 TWO
1494 three
1495 - four
1496 - five
1497 six
1498 "
1499 ),
1500 );
1501
1502 assert_eq!(
1503 snapshot
1504 .diff_hunks_in_range(MultiBufferOffset(0)..snapshot.len())
1505 .map(|hunk| hunk.row_range.start.0..hunk.row_range.end.0)
1506 .collect::<Vec<_>>(),
1507 &[0..4, 5..7]
1508 );
1509}
1510
1511#[gpui::test]
1512async fn test_repeatedly_expand_a_diff_hunk(cx: &mut TestAppContext) {
1513 let text = indoc!(
1514 "
1515 one
1516 TWO
1517 THREE
1518 four
1519 FIVE
1520 six
1521 "
1522 );
1523 let base_text = indoc!(
1524 "
1525 one
1526 four
1527 five
1528 six
1529 "
1530 );
1531
1532 let buffer = cx.new(|cx| Buffer::local(text, cx));
1533 let diff = cx
1534 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
1535 cx.run_until_parked();
1536
1537 let multibuffer = cx.new(|cx| {
1538 let mut multibuffer = MultiBuffer::singleton(buffer.clone(), cx);
1539 multibuffer.add_diff(diff.clone(), cx);
1540 multibuffer
1541 });
1542
1543 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
1544 (multibuffer.snapshot(cx), multibuffer.subscribe())
1545 });
1546
1547 multibuffer.update(cx, |multibuffer, cx| {
1548 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
1549 });
1550
1551 assert_new_snapshot(
1552 &multibuffer,
1553 &mut snapshot,
1554 &mut subscription,
1555 cx,
1556 indoc!(
1557 "
1558 one
1559 + TWO
1560 + THREE
1561 four
1562 - five
1563 + FIVE
1564 six
1565 "
1566 ),
1567 );
1568
1569 // Regression test: expanding diff hunks that are already expanded should not change anything.
1570 multibuffer.update(cx, |multibuffer, cx| {
1571 multibuffer.expand_diff_hunks(
1572 vec![
1573 snapshot.anchor_before(Point::new(2, 0))..snapshot.anchor_before(Point::new(2, 0)),
1574 ],
1575 cx,
1576 );
1577 });
1578
1579 assert_new_snapshot(
1580 &multibuffer,
1581 &mut snapshot,
1582 &mut subscription,
1583 cx,
1584 indoc!(
1585 "
1586 one
1587 + TWO
1588 + THREE
1589 four
1590 - five
1591 + FIVE
1592 six
1593 "
1594 ),
1595 );
1596
1597 // Now collapse all diff hunks
1598 multibuffer.update(cx, |multibuffer, cx| {
1599 multibuffer.collapse_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
1600 });
1601
1602 assert_new_snapshot(
1603 &multibuffer,
1604 &mut snapshot,
1605 &mut subscription,
1606 cx,
1607 indoc!(
1608 "
1609 one
1610 TWO
1611 THREE
1612 four
1613 FIVE
1614 six
1615 "
1616 ),
1617 );
1618
1619 // Expand the hunks again, but this time provide two ranges that are both within the same hunk
1620 // Target the first hunk which is between "one" and "four"
1621 multibuffer.update(cx, |multibuffer, cx| {
1622 multibuffer.expand_diff_hunks(
1623 vec![
1624 snapshot.anchor_before(Point::new(4, 0))..snapshot.anchor_before(Point::new(4, 0)),
1625 snapshot.anchor_before(Point::new(4, 2))..snapshot.anchor_before(Point::new(4, 2)),
1626 ],
1627 cx,
1628 );
1629 });
1630 assert_new_snapshot(
1631 &multibuffer,
1632 &mut snapshot,
1633 &mut subscription,
1634 cx,
1635 indoc!(
1636 "
1637 one
1638 TWO
1639 THREE
1640 four
1641 - five
1642 + FIVE
1643 six
1644 "
1645 ),
1646 );
1647}
1648
1649#[gpui::test]
1650fn test_set_excerpts_for_buffer_ordering(cx: &mut TestAppContext) {
1651 let buf1 = cx.new(|cx| {
1652 Buffer::local(
1653 indoc! {
1654 "zero
1655 one
1656 two
1657 two.five
1658 three
1659 four
1660 five
1661 six
1662 seven
1663 eight
1664 nine
1665 ten
1666 eleven
1667 ",
1668 },
1669 cx,
1670 )
1671 });
1672 let path1: PathKey = PathKey::with_sort_prefix(0, rel_path("root").into_arc());
1673
1674 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
1675 multibuffer.update(cx, |multibuffer, cx| {
1676 multibuffer.set_excerpts_for_path(
1677 path1.clone(),
1678 buf1.clone(),
1679 vec![
1680 Point::row_range(1..2),
1681 Point::row_range(6..7),
1682 Point::row_range(11..12),
1683 ],
1684 1,
1685 cx,
1686 );
1687 });
1688
1689 assert_excerpts_match(
1690 &multibuffer,
1691 cx,
1692 indoc! {
1693 "-----
1694 zero
1695 one
1696 two
1697 two.five
1698 -----
1699 four
1700 five
1701 six
1702 seven
1703 -----
1704 nine
1705 ten
1706 eleven
1707 "
1708 },
1709 );
1710
1711 buf1.update(cx, |buffer, cx| buffer.edit([(0..5, "")], None, cx));
1712
1713 multibuffer.update(cx, |multibuffer, cx| {
1714 multibuffer.set_excerpts_for_path(
1715 path1.clone(),
1716 buf1.clone(),
1717 vec![
1718 Point::row_range(0..3),
1719 Point::row_range(5..7),
1720 Point::row_range(10..11),
1721 ],
1722 1,
1723 cx,
1724 );
1725 });
1726
1727 assert_excerpts_match(
1728 &multibuffer,
1729 cx,
1730 indoc! {
1731 "-----
1732 one
1733 two
1734 two.five
1735 three
1736 four
1737 five
1738 six
1739 seven
1740 eight
1741 nine
1742 ten
1743 eleven
1744 "
1745 },
1746 );
1747}
1748
1749#[gpui::test]
1750fn test_set_excerpts_for_buffer(cx: &mut TestAppContext) {
1751 let buf1 = cx.new(|cx| {
1752 Buffer::local(
1753 indoc! {
1754 "zero
1755 one
1756 two
1757 three
1758 four
1759 five
1760 six
1761 seven
1762 ",
1763 },
1764 cx,
1765 )
1766 });
1767 let path1: PathKey = PathKey::with_sort_prefix(0, rel_path("root").into_arc());
1768 let buf2 = cx.new(|cx| {
1769 Buffer::local(
1770 indoc! {
1771 "000
1772 111
1773 222
1774 333
1775 444
1776 555
1777 666
1778 777
1779 888
1780 999
1781 "
1782 },
1783 cx,
1784 )
1785 });
1786 let path2 = PathKey::with_sort_prefix(1, rel_path("root").into_arc());
1787
1788 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
1789 multibuffer.update(cx, |multibuffer, cx| {
1790 multibuffer.set_excerpts_for_path(
1791 path1.clone(),
1792 buf1.clone(),
1793 vec![Point::row_range(0..1)],
1794 2,
1795 cx,
1796 );
1797 });
1798
1799 assert_excerpts_match(
1800 &multibuffer,
1801 cx,
1802 indoc! {
1803 "-----
1804 zero
1805 one
1806 two
1807 three
1808 "
1809 },
1810 );
1811
1812 multibuffer.update(cx, |multibuffer, cx| {
1813 multibuffer.set_excerpts_for_path(path1.clone(), buf1.clone(), vec![], 2, cx);
1814 });
1815
1816 assert_excerpts_match(&multibuffer, cx, "");
1817
1818 multibuffer.update(cx, |multibuffer, cx| {
1819 multibuffer.set_excerpts_for_path(
1820 path1.clone(),
1821 buf1.clone(),
1822 vec![Point::row_range(0..1), Point::row_range(7..8)],
1823 2,
1824 cx,
1825 );
1826 });
1827
1828 assert_excerpts_match(
1829 &multibuffer,
1830 cx,
1831 indoc! {"-----
1832 zero
1833 one
1834 two
1835 three
1836 -----
1837 five
1838 six
1839 seven
1840 "},
1841 );
1842
1843 multibuffer.update(cx, |multibuffer, cx| {
1844 multibuffer.set_excerpts_for_path(
1845 path1.clone(),
1846 buf1.clone(),
1847 vec![Point::row_range(0..1), Point::row_range(5..6)],
1848 2,
1849 cx,
1850 );
1851 });
1852
1853 assert_excerpts_match(
1854 &multibuffer,
1855 cx,
1856 indoc! {"-----
1857 zero
1858 one
1859 two
1860 three
1861 four
1862 five
1863 six
1864 seven
1865 "},
1866 );
1867
1868 multibuffer.update(cx, |multibuffer, cx| {
1869 multibuffer.set_excerpts_for_path(
1870 path2.clone(),
1871 buf2.clone(),
1872 vec![Point::row_range(2..3)],
1873 2,
1874 cx,
1875 );
1876 });
1877
1878 assert_excerpts_match(
1879 &multibuffer,
1880 cx,
1881 indoc! {"-----
1882 zero
1883 one
1884 two
1885 three
1886 four
1887 five
1888 six
1889 seven
1890 -----
1891 000
1892 111
1893 222
1894 333
1895 444
1896 555
1897 "},
1898 );
1899
1900 multibuffer.update(cx, |multibuffer, cx| {
1901 multibuffer.set_excerpts_for_path(path1.clone(), buf1.clone(), vec![], 2, cx);
1902 });
1903
1904 multibuffer.update(cx, |multibuffer, cx| {
1905 multibuffer.set_excerpts_for_path(
1906 path1.clone(),
1907 buf1.clone(),
1908 vec![Point::row_range(3..4)],
1909 2,
1910 cx,
1911 );
1912 });
1913
1914 assert_excerpts_match(
1915 &multibuffer,
1916 cx,
1917 indoc! {"-----
1918 one
1919 two
1920 three
1921 four
1922 five
1923 six
1924 -----
1925 000
1926 111
1927 222
1928 333
1929 444
1930 555
1931 "},
1932 );
1933
1934 multibuffer.update(cx, |multibuffer, cx| {
1935 multibuffer.set_excerpts_for_path(
1936 path1.clone(),
1937 buf1.clone(),
1938 vec![Point::row_range(3..4)],
1939 2,
1940 cx,
1941 );
1942 });
1943}
1944
1945#[gpui::test]
1946fn test_set_excerpts_for_buffer_rename(cx: &mut TestAppContext) {
1947 let buf1 = cx.new(|cx| {
1948 Buffer::local(
1949 indoc! {
1950 "zero
1951 one
1952 two
1953 three
1954 four
1955 five
1956 six
1957 seven
1958 ",
1959 },
1960 cx,
1961 )
1962 });
1963 let path: PathKey = PathKey::with_sort_prefix(0, rel_path("root").into_arc());
1964 let buf2 = cx.new(|cx| {
1965 Buffer::local(
1966 indoc! {
1967 "000
1968 111
1969 222
1970 333
1971 "
1972 },
1973 cx,
1974 )
1975 });
1976
1977 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
1978 multibuffer.update(cx, |multibuffer, cx| {
1979 multibuffer.set_excerpts_for_path(
1980 path.clone(),
1981 buf1.clone(),
1982 vec![Point::row_range(1..1), Point::row_range(4..5)],
1983 1,
1984 cx,
1985 );
1986 });
1987
1988 assert_excerpts_match(
1989 &multibuffer,
1990 cx,
1991 indoc! {
1992 "-----
1993 zero
1994 one
1995 two
1996 three
1997 four
1998 five
1999 six
2000 "
2001 },
2002 );
2003
2004 multibuffer.update(cx, |multibuffer, cx| {
2005 multibuffer.set_excerpts_for_path(
2006 path.clone(),
2007 buf2.clone(),
2008 vec![Point::row_range(0..1)],
2009 2,
2010 cx,
2011 );
2012 });
2013
2014 assert_excerpts_match(
2015 &multibuffer,
2016 cx,
2017 indoc! {"-----
2018 000
2019 111
2020 222
2021 333
2022 "},
2023 );
2024}
2025
2026#[gpui::test]
2027async fn test_diff_hunks_with_multiple_excerpts(cx: &mut TestAppContext) {
2028 let base_text_1 = indoc!(
2029 "
2030 one
2031 two
2032 three
2033 four
2034 five
2035 six
2036 "
2037 );
2038 let text_1 = indoc!(
2039 "
2040 ZERO
2041 one
2042 TWO
2043 three
2044 six
2045 "
2046 );
2047 let base_text_2 = indoc!(
2048 "
2049 seven
2050 eight
2051 nine
2052 ten
2053 eleven
2054 twelve
2055 "
2056 );
2057 let text_2 = indoc!(
2058 "
2059 eight
2060 nine
2061 eleven
2062 THIRTEEN
2063 FOURTEEN
2064 "
2065 );
2066
2067 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
2068 let buffer_2 = cx.new(|cx| Buffer::local(text_2, cx));
2069 let diff_1 = cx.new(|cx| {
2070 BufferDiff::new_with_base_text(base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
2071 });
2072 let diff_2 = cx.new(|cx| {
2073 BufferDiff::new_with_base_text(base_text_2, &buffer_2.read(cx).text_snapshot(), cx)
2074 });
2075 cx.run_until_parked();
2076
2077 let multibuffer = cx.new(|cx| {
2078 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
2079 multibuffer.set_excerpts_for_path(
2080 PathKey::sorted(0),
2081 buffer_1.clone(),
2082 [Point::zero()..buffer_1.read(cx).max_point()],
2083 0,
2084 cx,
2085 );
2086 multibuffer.set_excerpts_for_path(
2087 PathKey::sorted(1),
2088 buffer_2.clone(),
2089 [Point::zero()..buffer_2.read(cx).max_point()],
2090 0,
2091 cx,
2092 );
2093 multibuffer.add_diff(diff_1.clone(), cx);
2094 multibuffer.add_diff(diff_2.clone(), cx);
2095 multibuffer
2096 });
2097
2098 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
2099 (multibuffer.snapshot(cx), multibuffer.subscribe())
2100 });
2101 assert_eq!(
2102 snapshot.text(),
2103 indoc!(
2104 "
2105 ZERO
2106 one
2107 TWO
2108 three
2109 six
2110
2111 eight
2112 nine
2113 eleven
2114 THIRTEEN
2115 FOURTEEN
2116 "
2117 ),
2118 );
2119
2120 multibuffer.update(cx, |multibuffer, cx| {
2121 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
2122 });
2123
2124 assert_new_snapshot(
2125 &multibuffer,
2126 &mut snapshot,
2127 &mut subscription,
2128 cx,
2129 indoc!(
2130 "
2131 + ZERO
2132 one
2133 - two
2134 + TWO
2135 three
2136 - four
2137 - five
2138 six
2139
2140 - seven
2141 eight
2142 nine
2143 - ten
2144 eleven
2145 - twelve
2146 + THIRTEEN
2147 + FOURTEEN
2148 "
2149 ),
2150 );
2151
2152 let id_1 = buffer_1.read_with(cx, |buffer, _| buffer.remote_id());
2153 let id_2 = buffer_2.read_with(cx, |buffer, _| buffer.remote_id());
2154 let base_id_1 = diff_1.read_with(cx, |diff, cx| diff.base_text(cx).remote_id());
2155 let base_id_2 = diff_2.read_with(cx, |diff, cx| diff.base_text(cx).remote_id());
2156
2157 let buffer_lines = (0..=snapshot.max_row().0)
2158 .map(|row| {
2159 let (buffer, range) = snapshot.buffer_line_for_row(MultiBufferRow(row))?;
2160 Some((
2161 buffer.remote_id(),
2162 buffer.text_for_range(range).collect::<String>(),
2163 ))
2164 })
2165 .collect::<Vec<_>>();
2166 pretty_assertions::assert_eq!(
2167 buffer_lines,
2168 [
2169 Some((id_1, "ZERO".into())),
2170 Some((id_1, "one".into())),
2171 Some((base_id_1, "two".into())),
2172 Some((id_1, "TWO".into())),
2173 Some((id_1, " three".into())),
2174 Some((base_id_1, "four".into())),
2175 Some((base_id_1, "five".into())),
2176 Some((id_1, "six".into())),
2177 Some((id_1, "".into())),
2178 Some((base_id_2, "seven".into())),
2179 Some((id_2, " eight".into())),
2180 Some((id_2, "nine".into())),
2181 Some((base_id_2, "ten".into())),
2182 Some((id_2, "eleven".into())),
2183 Some((base_id_2, "twelve".into())),
2184 Some((id_2, "THIRTEEN".into())),
2185 Some((id_2, "FOURTEEN".into())),
2186 Some((id_2, "".into())),
2187 ]
2188 );
2189
2190 let buffer_ids_by_range = [
2191 (Point::new(0, 0)..Point::new(0, 0), &[id_1] as &[_]),
2192 (Point::new(0, 0)..Point::new(2, 0), &[id_1]),
2193 (Point::new(2, 0)..Point::new(2, 0), &[id_1]),
2194 (Point::new(3, 0)..Point::new(3, 0), &[id_1]),
2195 (Point::new(8, 0)..Point::new(9, 0), &[id_1]),
2196 (Point::new(8, 0)..Point::new(10, 0), &[id_1, id_2]),
2197 (Point::new(9, 0)..Point::new(9, 0), &[id_2]),
2198 ];
2199 for (range, buffer_ids) in buffer_ids_by_range {
2200 assert_eq!(
2201 snapshot
2202 .buffer_ids_for_range(range.clone())
2203 .collect::<Vec<_>>(),
2204 buffer_ids,
2205 "buffer_ids_for_range({range:?}"
2206 );
2207 }
2208
2209 assert_position_translation(&snapshot);
2210 assert_line_indents(&snapshot);
2211
2212 assert_eq!(
2213 snapshot
2214 .diff_hunks_in_range(MultiBufferOffset(0)..snapshot.len())
2215 .map(|hunk| hunk.row_range.start.0..hunk.row_range.end.0)
2216 .collect::<Vec<_>>(),
2217 &[0..1, 2..4, 5..7, 9..10, 12..13, 14..17]
2218 );
2219
2220 buffer_2.update(cx, |buffer, cx| {
2221 buffer.edit_via_marked_text(
2222 indoc!(
2223 "
2224 eight
2225 «»eleven
2226 THIRTEEN
2227 FOURTEEN
2228 "
2229 ),
2230 None,
2231 cx,
2232 );
2233 });
2234
2235 assert_new_snapshot(
2236 &multibuffer,
2237 &mut snapshot,
2238 &mut subscription,
2239 cx,
2240 indoc!(
2241 "
2242 + ZERO
2243 one
2244 - two
2245 + TWO
2246 three
2247 - four
2248 - five
2249 six
2250
2251 - seven
2252 eight
2253 eleven
2254 - twelve
2255 + THIRTEEN
2256 + FOURTEEN
2257 "
2258 ),
2259 );
2260
2261 assert_line_indents(&snapshot);
2262}
2263
2264/// A naive implementation of a multi-buffer that does not maintain
2265/// any derived state, used for comparison in a randomized test.
2266#[derive(Default)]
2267struct ReferenceMultibuffer {
2268 excerpts: Vec<ReferenceExcerpt>,
2269 diffs: HashMap<BufferId, Entity<BufferDiff>>,
2270 inverted_diffs: HashMap<BufferId, (Entity<BufferDiff>, Entity<language::Buffer>)>,
2271 expanded_diff_hunks_by_buffer: HashMap<BufferId, Vec<text::Anchor>>,
2272}
2273
2274#[derive(Debug)]
2275struct ReferenceExcerpt {
2276 path_key: PathKey,
2277 path_key_index: PathKeyIndex,
2278 buffer: Entity<Buffer>,
2279 range: Range<text::Anchor>,
2280}
2281
2282#[derive(Clone, Debug)]
2283struct ReferenceRegion {
2284 buffer_id: Option<BufferId>,
2285 range: Range<usize>,
2286 buffer_range: Option<Range<Point>>,
2287 status: Option<DiffHunkStatus>,
2288 excerpt_info: Option<ExcerptInfo>,
2289}
2290
2291impl ReferenceExcerpt {
2292 fn info(&self, cx: &App) -> ExcerptInfo {
2293 ExcerptInfo {
2294 path_key_index: self.path_key_index,
2295 buffer_id: self.buffer.read(cx).remote_id(),
2296 range: self.range.clone(),
2297 }
2298 }
2299}
2300
2301impl ReferenceMultibuffer {
2302 fn expand_excerpts(&mut self, excerpts: &HashSet<ExcerptInfo>, line_count: u32, cx: &App) {
2303 if line_count == 0 {
2304 return;
2305 }
2306
2307 for info in excerpts {
2308 let excerpt = self
2309 .excerpts
2310 .iter_mut()
2311 .find(|e| &e.info(cx) == info)
2312 .unwrap();
2313 let snapshot = excerpt.buffer.read(cx).snapshot();
2314 let mut point_range = excerpt.range.to_point(&snapshot);
2315 point_range.start = Point::new(point_range.start.row.saturating_sub(line_count), 0);
2316 point_range.end =
2317 snapshot.clip_point(Point::new(point_range.end.row + line_count, 0), Bias::Left);
2318 point_range.end.column = snapshot.line_len(point_range.end.row);
2319 excerpt.range =
2320 snapshot.anchor_before(point_range.start)..snapshot.anchor_after(point_range.end);
2321 }
2322 }
2323
2324 fn set_excerpts(
2325 &mut self,
2326 path_key: PathKey,
2327 path_key_index: PathKeyIndex,
2328 buffer: Entity<Buffer>,
2329 buffer_snapshot: &BufferSnapshot,
2330 ranges: Vec<ExcerptRange<Point>>,
2331 ) {
2332 self.excerpts.retain(|excerpt| {
2333 excerpt.path_key != path_key && excerpt.buffer.entity_id() != buffer.entity_id()
2334 });
2335
2336 let ranges = MultiBuffer::merge_excerpt_ranges(&ranges);
2337
2338 let (Ok(ix) | Err(ix)) = self
2339 .excerpts
2340 .binary_search_by(|probe| probe.path_key.cmp(&path_key));
2341 self.excerpts.splice(
2342 ix..ix,
2343 ranges.into_iter().map(|range| ReferenceExcerpt {
2344 path_key: path_key.clone(),
2345 path_key_index,
2346 buffer: buffer.clone(),
2347 range: buffer_snapshot.anchor_before(range.context.start)
2348 ..buffer_snapshot.anchor_after(range.context.end),
2349 }),
2350 );
2351 }
2352
2353 fn expand_diff_hunks(&mut self, path_key: PathKey, range: Range<text::Anchor>, cx: &App) {
2354 let excerpt = self
2355 .excerpts
2356 .iter_mut()
2357 .find(|e| {
2358 e.path_key == path_key
2359 && e.range
2360 .start
2361 .cmp(&range.start, &e.buffer.read(cx).snapshot())
2362 .is_le()
2363 })
2364 .unwrap();
2365 let buffer = excerpt.buffer.read(cx).snapshot();
2366 let buffer_id = buffer.remote_id();
2367
2368 // Skip inverted excerpts - hunks are always expanded
2369 if self.inverted_diffs.contains_key(&buffer_id) {
2370 return;
2371 }
2372
2373 let Some(diff) = self.diffs.get(&buffer_id) else {
2374 return;
2375 };
2376 let excerpt_range = excerpt.range.to_offset(&buffer);
2377 let expanded_diff_hunks = self
2378 .expanded_diff_hunks_by_buffer
2379 .entry(buffer_id)
2380 .or_default();
2381 for hunk in diff
2382 .read(cx)
2383 .snapshot(cx)
2384 .hunks_intersecting_range(range, &buffer)
2385 {
2386 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2387 if hunk_range.start < excerpt_range.start || hunk_range.start > excerpt_range.end {
2388 continue;
2389 }
2390 if let Err(ix) = expanded_diff_hunks
2391 .binary_search_by(|anchor| anchor.cmp(&hunk.buffer_range.start, &buffer))
2392 {
2393 log::info!(
2394 "expanding diff hunk {:?}. excerpt range:{:?}",
2395 hunk_range,
2396 excerpt_range
2397 );
2398 expanded_diff_hunks.insert(ix, hunk.buffer_range.start);
2399 } else {
2400 log::trace!("hunk {hunk_range:?} already expanded in excerpt");
2401 }
2402 }
2403 }
2404
2405 fn expected_content(&self, cx: &App) -> (String, Vec<RowInfo>, HashSet<MultiBufferRow>) {
2406 let mut text = String::new();
2407 let mut regions = Vec::<ReferenceRegion>::new();
2408 let mut excerpt_boundary_rows = HashSet::default();
2409 for excerpt in &self.excerpts {
2410 excerpt_boundary_rows.insert(MultiBufferRow(text.matches('\n').count() as u32));
2411 let buffer = excerpt.buffer.read(cx);
2412 let buffer_id = buffer.remote_id();
2413 let buffer_range = excerpt.range.to_offset(buffer);
2414
2415 if let Some((diff, main_buffer)) = self.inverted_diffs.get(&buffer_id) {
2416 let diff_snapshot = diff.read(cx).snapshot(cx);
2417 let main_buffer_snapshot = main_buffer.read(cx).snapshot();
2418
2419 let mut offset = buffer_range.start;
2420 for hunk in diff_snapshot.hunks_intersecting_base_text_range(
2421 buffer_range.clone(),
2422 &main_buffer_snapshot.text,
2423 ) {
2424 let mut hunk_base_range = hunk.diff_base_byte_range.clone();
2425
2426 hunk_base_range.end = hunk_base_range.end.min(buffer_range.end);
2427 if hunk_base_range.start > buffer_range.end
2428 || hunk_base_range.start < buffer_range.start
2429 {
2430 continue;
2431 }
2432
2433 // Add the text before the hunk
2434 if hunk_base_range.start >= offset {
2435 let len = text.len();
2436 text.extend(buffer.text_for_range(offset..hunk_base_range.start));
2437 if text.len() > len {
2438 regions.push(ReferenceRegion {
2439 buffer_id: Some(buffer_id),
2440 range: len..text.len(),
2441 buffer_range: Some(
2442 (offset..hunk_base_range.start).to_point(&buffer),
2443 ),
2444 status: None,
2445 excerpt_info: Some(excerpt.info(cx)),
2446 });
2447 }
2448 }
2449
2450 // Add the "deleted" region (base text that's not in main)
2451 if !hunk_base_range.is_empty() {
2452 let len = text.len();
2453 text.extend(buffer.text_for_range(hunk_base_range.clone()));
2454 regions.push(ReferenceRegion {
2455 buffer_id: Some(buffer_id),
2456 range: len..text.len(),
2457 buffer_range: Some(hunk_base_range.to_point(&buffer)),
2458 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2459 excerpt_info: Some(excerpt.info(cx)),
2460 });
2461 }
2462
2463 offset = hunk_base_range.end;
2464 }
2465
2466 // Add remaining buffer text
2467 let len = text.len();
2468 text.extend(buffer.text_for_range(offset..buffer_range.end));
2469 text.push('\n');
2470 regions.push(ReferenceRegion {
2471 buffer_id: Some(buffer_id),
2472 range: len..text.len(),
2473 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2474 status: None,
2475 excerpt_info: Some(excerpt.info(cx)),
2476 });
2477 } else {
2478 let diff = self.diffs.get(&buffer_id).unwrap().read(cx).snapshot(cx);
2479 let base_buffer = diff.base_text();
2480
2481 let mut offset = buffer_range.start;
2482 let hunks = diff
2483 .hunks_intersecting_range(excerpt.range.clone(), buffer)
2484 .peekable();
2485
2486 for hunk in hunks {
2487 // Ignore hunks that are outside the excerpt range.
2488 let mut hunk_range = hunk.buffer_range.to_offset(buffer);
2489
2490 hunk_range.end = hunk_range.end.min(buffer_range.end);
2491 if hunk_range.start > buffer_range.end || hunk_range.start < buffer_range.start
2492 {
2493 log::trace!("skipping hunk outside excerpt range");
2494 continue;
2495 }
2496
2497 if !self
2498 .expanded_diff_hunks_by_buffer
2499 .get(&buffer_id)
2500 .cloned()
2501 .into_iter()
2502 .flatten()
2503 .any(|expanded_anchor| {
2504 expanded_anchor.to_offset(buffer).max(buffer_range.start)
2505 == hunk_range.start.max(buffer_range.start)
2506 })
2507 {
2508 log::trace!("skipping a hunk that's not marked as expanded");
2509 continue;
2510 }
2511
2512 if !hunk.buffer_range.start.is_valid(buffer) {
2513 log::trace!("skipping hunk with deleted start: {:?}", hunk.range);
2514 continue;
2515 }
2516
2517 if hunk_range.start >= offset {
2518 // Add the buffer text before the hunk
2519 let len = text.len();
2520 text.extend(buffer.text_for_range(offset..hunk_range.start));
2521 if text.len() > len {
2522 regions.push(ReferenceRegion {
2523 buffer_id: Some(buffer_id),
2524 range: len..text.len(),
2525 buffer_range: Some((offset..hunk_range.start).to_point(&buffer)),
2526 status: None,
2527 excerpt_info: Some(excerpt.info(cx)),
2528 });
2529 }
2530
2531 // Add the deleted text for the hunk.
2532 if !hunk.diff_base_byte_range.is_empty() {
2533 let mut base_text = base_buffer
2534 .text_for_range(hunk.diff_base_byte_range.clone())
2535 .collect::<String>();
2536 if !base_text.ends_with('\n') {
2537 base_text.push('\n');
2538 }
2539 let len = text.len();
2540 text.push_str(&base_text);
2541 regions.push(ReferenceRegion {
2542 buffer_id: Some(base_buffer.remote_id()),
2543 range: len..text.len(),
2544 buffer_range: Some(
2545 hunk.diff_base_byte_range.to_point(&base_buffer),
2546 ),
2547 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2548 excerpt_info: Some(excerpt.info(cx)),
2549 });
2550 }
2551
2552 offset = hunk_range.start;
2553 }
2554
2555 // Add the inserted text for the hunk.
2556 if hunk_range.end > offset {
2557 let len = text.len();
2558 text.extend(buffer.text_for_range(offset..hunk_range.end));
2559 let range = len..text.len();
2560 let region = ReferenceRegion {
2561 buffer_id: Some(buffer_id),
2562 range,
2563 buffer_range: Some((offset..hunk_range.end).to_point(&buffer)),
2564 status: Some(DiffHunkStatus::added(hunk.secondary_status)),
2565 excerpt_info: Some(excerpt.info(cx)),
2566 };
2567 offset = hunk_range.end;
2568 regions.push(region);
2569 }
2570 }
2571
2572 // Add the buffer text for the rest of the excerpt.
2573 let len = text.len();
2574 text.extend(buffer.text_for_range(offset..buffer_range.end));
2575 text.push('\n');
2576 regions.push(ReferenceRegion {
2577 buffer_id: Some(buffer_id),
2578 range: len..text.len(),
2579 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2580 status: None,
2581 excerpt_info: Some(excerpt.info(cx)),
2582 });
2583 }
2584 }
2585
2586 // Remove final trailing newline.
2587 if self.excerpts.is_empty() {
2588 regions.push(ReferenceRegion {
2589 buffer_id: None,
2590 range: 0..1,
2591 buffer_range: Some(Point::new(0, 0)..Point::new(0, 1)),
2592 status: None,
2593 excerpt_info: None,
2594 });
2595 } else {
2596 text.pop();
2597 }
2598
2599 // Retrieve the row info using the region that contains
2600 // the start of each multi-buffer line.
2601 let mut ix = 0;
2602 let row_infos = text
2603 .split('\n')
2604 .map(|line| {
2605 let row_info = regions
2606 .iter()
2607 .position(|region| region.range.contains(&ix))
2608 .map_or(RowInfo::default(), |region_ix| {
2609 let region = regions[region_ix].clone();
2610 let buffer_row = region.buffer_range.as_ref().map(|buffer_range| {
2611 buffer_range.start.row
2612 + text[region.range.start..ix].matches('\n').count() as u32
2613 });
2614 let main_buffer = self
2615 .excerpts
2616 .iter()
2617 .find(|e| e.info(cx) == region.excerpt_info.clone().unwrap())
2618 .map(|e| e.buffer.clone());
2619 let is_excerpt_start = region_ix == 0
2620 || ®ions[region_ix - 1].excerpt_info != ®ion.excerpt_info
2621 || regions[region_ix - 1].range.is_empty();
2622 let mut is_excerpt_end = region_ix == regions.len() - 1
2623 || ®ions[region_ix + 1].excerpt_info != ®ion.excerpt_info;
2624 let is_start = !text[region.range.start..ix].contains('\n');
2625 let mut is_end = if region.range.end > text.len() {
2626 !text[ix..].contains('\n')
2627 } else {
2628 text[ix..region.range.end.min(text.len())]
2629 .matches('\n')
2630 .count()
2631 == 1
2632 };
2633 if region_ix < regions.len() - 1
2634 && !text[ix..].contains("\n")
2635 && (region.status == Some(DiffHunkStatus::added_none())
2636 || region.status.is_some_and(|s| s.is_deleted()))
2637 && regions[region_ix + 1].excerpt_info == region.excerpt_info
2638 && regions[region_ix + 1].range.start == text.len()
2639 {
2640 is_end = true;
2641 is_excerpt_end = true;
2642 }
2643 let multibuffer_row =
2644 MultiBufferRow(text[..ix].matches('\n').count() as u32);
2645 let mut expand_direction = None;
2646 if let Some(buffer) = &main_buffer {
2647 let buffer_row = buffer_row.unwrap();
2648 let needs_expand_up = is_excerpt_start && is_start && buffer_row > 0;
2649 let needs_expand_down = is_excerpt_end
2650 && is_end
2651 && buffer.read(cx).max_point().row > buffer_row;
2652 expand_direction = if needs_expand_up && needs_expand_down {
2653 Some(ExpandExcerptDirection::UpAndDown)
2654 } else if needs_expand_up {
2655 Some(ExpandExcerptDirection::Up)
2656 } else if needs_expand_down {
2657 Some(ExpandExcerptDirection::Down)
2658 } else {
2659 None
2660 };
2661 }
2662 RowInfo {
2663 buffer_id: region.buffer_id,
2664 diff_status: region.status,
2665 buffer_row,
2666 wrapped_buffer_row: None,
2667
2668 multibuffer_row: Some(multibuffer_row),
2669 expand_info: expand_direction.zip(region.excerpt_info.clone()).map(
2670 |(direction, excerpt_info)| ExpandInfo {
2671 direction,
2672 excerpt_range: excerpt_info.range,
2673 },
2674 ),
2675 }
2676 });
2677 ix += line.len() + 1;
2678 row_info
2679 })
2680 .collect();
2681
2682 (text, row_infos, excerpt_boundary_rows)
2683 }
2684
2685 fn diffs_updated(&mut self, cx: &App) {
2686 for excerpt in &mut self.excerpts {
2687 let buffer = excerpt.buffer.read(cx).snapshot();
2688 let buffer_id = buffer.remote_id();
2689
2690 // Skip inverted diff excerpts - hunks are always expanded
2691 if self.inverted_diffs.contains_key(&buffer_id) {
2692 continue;
2693 }
2694
2695 let excerpt_range = excerpt.range.to_offset(&buffer);
2696 let Some(diff) = self.diffs.get(&buffer_id) else {
2697 continue;
2698 };
2699 let diff = diff.read(cx).snapshot(cx);
2700 let mut hunks = diff.hunks_in_row_range(0..u32::MAX, &buffer).peekable();
2701 self.expanded_diff_hunks_by_buffer
2702 .entry(buffer_id)
2703 .or_default()
2704 .retain(|hunk_anchor| {
2705 if !hunk_anchor.is_valid(&buffer) {
2706 return false;
2707 }
2708 while let Some(hunk) = hunks.peek() {
2709 match hunk.buffer_range.start.cmp(hunk_anchor, &buffer) {
2710 cmp::Ordering::Less => {
2711 hunks.next();
2712 }
2713 cmp::Ordering::Equal => {
2714 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2715 return hunk_range.end >= excerpt_range.start
2716 && hunk_range.start <= excerpt_range.end;
2717 }
2718 cmp::Ordering::Greater => break,
2719 }
2720 }
2721 false
2722 });
2723 }
2724 }
2725
2726 fn add_diff(&mut self, diff: Entity<BufferDiff>, cx: &mut App) {
2727 let buffer_id = diff.read(cx).buffer_id;
2728 self.diffs.insert(buffer_id, diff);
2729 }
2730
2731 fn add_inverted_diff(
2732 &mut self,
2733 diff: Entity<BufferDiff>,
2734 main_buffer: Entity<language::Buffer>,
2735 cx: &App,
2736 ) {
2737 let base_text_buffer_id = diff.read(cx).base_text(cx).remote_id();
2738 self.inverted_diffs
2739 .insert(base_text_buffer_id, (diff, main_buffer));
2740 }
2741}
2742
2743#[gpui::test(iterations = 100)]
2744async fn test_random_set_ranges(cx: &mut TestAppContext, mut rng: StdRng) {
2745 let base_text = "a\n".repeat(100);
2746 let buf = cx.update(|cx| cx.new(|cx| Buffer::local(base_text, cx)));
2747 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2748
2749 let operations = env::var("OPERATIONS")
2750 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2751 .unwrap_or(10);
2752
2753 fn row_ranges(ranges: &Vec<Range<Point>>) -> Vec<Range<u32>> {
2754 ranges
2755 .iter()
2756 .map(|range| range.start.row..range.end.row)
2757 .collect()
2758 }
2759
2760 for _ in 0..operations {
2761 let snapshot = buf.update(cx, |buf, _| buf.snapshot());
2762 let num_ranges = rng.random_range(0..=10);
2763 let max_row = snapshot.max_point().row;
2764 let mut ranges = (0..num_ranges)
2765 .map(|_| {
2766 let start = rng.random_range(0..max_row);
2767 let end = rng.random_range(start + 1..max_row + 1);
2768 Point::row_range(start..end)
2769 })
2770 .collect::<Vec<_>>();
2771 ranges.sort_by_key(|range| range.start);
2772 log::info!("Setting ranges: {:?}", row_ranges(&ranges));
2773 let (created, _) = multibuffer.update(cx, |multibuffer, cx| {
2774 multibuffer.set_excerpts_for_path(
2775 PathKey::for_buffer(&buf, cx),
2776 buf.clone(),
2777 ranges.clone(),
2778 2,
2779 cx,
2780 )
2781 });
2782
2783 assert_eq!(created.len(), ranges.len());
2784
2785 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2786 let mut last_end = None;
2787 let mut seen_ranges = Vec::default();
2788
2789 for (buf, info) in snapshot.excerpts() {
2790 let start = info.range.start.to_point(buf);
2791 let end = info.range.end.to_point(buf);
2792 seen_ranges.push(start..end);
2793
2794 if let Some(last_end) = last_end.take() {
2795 assert!(
2796 start > last_end,
2797 "multibuffer has out-of-order ranges: {:?}; {:?} <= {:?}",
2798 row_ranges(&seen_ranges),
2799 start,
2800 last_end
2801 )
2802 }
2803
2804 ranges.retain(|range| range.start < start || range.end > end);
2805
2806 last_end = Some(end)
2807 }
2808
2809 assert!(
2810 ranges.is_empty(),
2811 "multibuffer {:?} did not include all ranges: {:?}",
2812 row_ranges(&seen_ranges),
2813 row_ranges(&ranges)
2814 );
2815 }
2816}
2817
2818#[gpui::test]
2819async fn test_remove_last_excerpt(cx: &mut TestAppContext) {
2820 let buffer = cx.new(|cx| {
2821 Buffer::local(
2822 indoc! {"
2823 aaa
2824 bbb
2825 ccc
2826 ddd
2827 eee
2828 fff
2829 ggg
2830 hhh
2831 "},
2832 cx,
2833 )
2834 });
2835 let buffer_snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot());
2836
2837 let multibuffer = cx.new(|cx| {
2838 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
2839 multibuffer.set_excerpt_ranges_for_path(
2840 PathKey::sorted(0),
2841 buffer.clone(),
2842 &buffer_snapshot,
2843 vec![
2844 ExcerptRange::new(Point::zero()..Point::new(3, 0)),
2845 ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
2846 ],
2847 cx,
2848 );
2849 multibuffer
2850 });
2851
2852 multibuffer.read_with(cx, |multibuffer, cx| {
2853 let snapshot = multibuffer.snapshot(cx);
2854
2855 let actual_boundary_rows = snapshot
2856 .excerpt_boundaries_in_range(MultiBufferOffset(0)..)
2857 .map(|b| b.row)
2858 .collect::<HashSet<_>>();
2859 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
2860 let text = snapshot.text();
2861 eprintln!(
2862 "{}",
2863 format_diff(&text, &actual_row_infos, &actual_boundary_rows, Some(false))
2864 );
2865 });
2866
2867 multibuffer.update(cx, |multibuffer, cx| {
2868 multibuffer.set_excerpt_ranges_for_path(
2869 PathKey::sorted(0),
2870 buffer,
2871 &buffer_snapshot,
2872 vec![ExcerptRange::new(Point::zero()..Point::new(3, 0))],
2873 cx,
2874 );
2875 });
2876
2877 multibuffer.read_with(cx, |multibuffer, cx| {
2878 let snapshot = multibuffer.snapshot(cx);
2879 let actual_text = snapshot.text();
2880 let actual_boundary_rows = snapshot
2881 .excerpt_boundaries_in_range(MultiBufferOffset(0)..)
2882 .map(|b| b.row)
2883 .collect::<HashSet<_>>();
2884 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
2885 let text = snapshot.text();
2886
2887 eprintln!(
2888 "{}",
2889 format_diff(
2890 &actual_text,
2891 &actual_row_infos,
2892 &actual_boundary_rows,
2893 Some(false)
2894 )
2895 );
2896 });
2897}
2898
2899#[gpui::test(iterations = 100)]
2900async fn test_random_multibuffer(cx: &mut TestAppContext, mut rng: StdRng) {
2901 let operations = env::var("OPERATIONS")
2902 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2903 .unwrap_or(10);
2904 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2905 let mut buffers: Vec<Entity<Buffer>> = Vec::new();
2906 let mut base_texts: HashMap<BufferId, String> = HashMap::default();
2907 let mut reference = ReferenceMultibuffer::default();
2908 let mut anchors = Vec::new();
2909 let mut old_versions = Vec::new();
2910 let mut needs_diff_calculation = false;
2911 let mut inverted_diff_main_buffers: HashMap<BufferId, Entity<BufferDiff>> = HashMap::default();
2912 for _ in 0..operations {
2913 match rng.random_range(0..100) {
2914 0..=14 if !buffers.is_empty() => {
2915 let buffer = buffers.choose(&mut rng).unwrap();
2916 buffer.update(cx, |buf, cx| {
2917 let edit_count = rng.random_range(1..5);
2918 buf.randomly_edit(&mut rng, edit_count, cx);
2919 log::info!("buffer text:\n{}", buf.text());
2920 needs_diff_calculation = true;
2921 });
2922 cx.update(|cx| reference.diffs_updated(cx));
2923 }
2924 15..=24 if !reference.excerpts.is_empty() => {
2925 multibuffer.update(cx, |multibuffer, cx| {
2926 let snapshot = multibuffer.snapshot(cx);
2927 let infos = snapshot
2928 .excerpts()
2929 .map(|(_, info)| info)
2930 .collect::<Vec<_>>();
2931 let mut excerpts = HashSet::default();
2932 for _ in 0..rng.random_range(0..infos.len()) {
2933 excerpts.extend(infos.choose(&mut rng).cloned());
2934 }
2935
2936 let line_count = rng.random_range(0..5);
2937
2938 let excerpt_ixs = excerpts
2939 .iter()
2940 .map(|info| {
2941 reference
2942 .excerpts
2943 .iter()
2944 .position(|e| e.info(cx) == *info)
2945 .unwrap()
2946 })
2947 .collect::<Vec<_>>();
2948 log::info!("Expanding excerpts {excerpt_ixs:?} by {line_count} lines");
2949 multibuffer.expand_excerpts(
2950 excerpts
2951 .iter()
2952 .map(|info| Anchor::in_buffer(info.path_key_index, info.range.end)),
2953 line_count,
2954 ExpandExcerptDirection::UpAndDown,
2955 cx,
2956 );
2957
2958 reference.expand_excerpts(&excerpts, line_count, cx);
2959 });
2960 }
2961 25..=34 if !reference.excerpts.is_empty() => {
2962 let multibuffer =
2963 multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2964 let offset = multibuffer.clip_offset(
2965 MultiBufferOffset(rng.random_range(0..=multibuffer.len().0)),
2966 Bias::Left,
2967 );
2968 let bias = if rng.random() {
2969 Bias::Left
2970 } else {
2971 Bias::Right
2972 };
2973 log::info!("Creating anchor at {} with bias {:?}", offset.0, bias);
2974 anchors.push(multibuffer.anchor_at(offset, bias));
2975 anchors.sort_by(|a, b| a.cmp(b, &multibuffer));
2976 }
2977 35..=45 if !reference.excerpts.is_empty() => {
2978 multibuffer.update(cx, |multibuffer, cx| {
2979 let snapshot = multibuffer.snapshot(cx);
2980 let excerpt_ix = rng.random_range(0..reference.excerpts.len());
2981 let excerpt = &reference.excerpts[excerpt_ix];
2982
2983 // Skip inverted excerpts - hunks can't be collapsed
2984 let buffer_id = excerpt.buffer.read(cx).remote_id();
2985 if reference.inverted_diffs.contains_key(&buffer_id) {
2986 return;
2987 }
2988
2989 let start = excerpt.range.start;
2990 let end = excerpt.range.end;
2991 let range = snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, start).unwrap()
2992 ..snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, end).unwrap();
2993
2994 log::info!(
2995 "expanding diff hunks in range {:?} (excerpt index {excerpt_ix:?}, buffer id {:?})",
2996 range.to_offset(&snapshot),
2997 buffer_id,
2998 );
2999 reference.expand_diff_hunks(excerpt.path_key.clone(), start..end, cx);
3000 multibuffer.expand_diff_hunks(vec![range], cx);
3001 });
3002 }
3003 46..=75 if needs_diff_calculation => {
3004 multibuffer.update(cx, |multibuffer, cx| {
3005 for buffer in multibuffer.all_buffers() {
3006 let snapshot = buffer.read(cx).snapshot();
3007 let buffer_id = snapshot.remote_id();
3008
3009 if let Some(diff) = multibuffer.diff_for(buffer_id) {
3010 diff.update(cx, |diff, cx| {
3011 log::info!("recalculating diff for buffer {:?}", buffer_id,);
3012 diff.recalculate_diff_sync(&snapshot.text, cx);
3013 });
3014 }
3015
3016 if let Some(inverted_diff) = inverted_diff_main_buffers.get(&buffer_id) {
3017 inverted_diff.update(cx, |diff, cx| {
3018 log::info!(
3019 "recalculating inverted diff for main buffer {:?}",
3020 buffer_id,
3021 );
3022 diff.recalculate_diff_sync(&snapshot.text, cx);
3023 });
3024 }
3025 }
3026 reference.diffs_updated(cx);
3027 needs_diff_calculation = false;
3028 });
3029 }
3030 _ => {
3031 // Decide if we're creating a new buffer or reusing an existing one
3032 let create_new_buffer = buffers.is_empty() || rng.random_bool(0.4);
3033
3034 let (excerpt_buffer, diff, inverted_main_buffer) = if create_new_buffer {
3035 let create_inverted = rng.random_bool(0.3);
3036
3037 if create_inverted {
3038 let mut main_buffer_text = util::RandomCharIter::new(&mut rng)
3039 .take(256)
3040 .collect::<String>();
3041 let main_buffer = cx.new(|cx| Buffer::local(main_buffer_text.clone(), cx));
3042 text::LineEnding::normalize(&mut main_buffer_text);
3043 let main_buffer_id =
3044 main_buffer.read_with(cx, |buffer, _| buffer.remote_id());
3045 base_texts.insert(main_buffer_id, main_buffer_text.clone());
3046 buffers.push(main_buffer.clone());
3047
3048 let diff = cx.new(|cx| {
3049 BufferDiff::new_with_base_text(
3050 &main_buffer_text,
3051 &main_buffer.read(cx).text_snapshot(),
3052 cx,
3053 )
3054 });
3055
3056 let base_text_buffer =
3057 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3058
3059 // Track for recalculation when main buffer is edited
3060 inverted_diff_main_buffers.insert(main_buffer_id, diff.clone());
3061
3062 (base_text_buffer, diff, Some(main_buffer))
3063 } else {
3064 let mut base_text = util::RandomCharIter::new(&mut rng)
3065 .take(256)
3066 .collect::<String>();
3067
3068 let buffer_handle = cx.new(|cx| Buffer::local(base_text.clone(), cx));
3069 text::LineEnding::normalize(&mut base_text);
3070 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3071 base_texts.insert(buffer_id, base_text.clone());
3072 buffers.push(buffer_handle.clone());
3073
3074 let diff = cx.new(|cx| {
3075 BufferDiff::new_with_base_text(
3076 &base_text,
3077 &buffer_handle.read(cx).text_snapshot(),
3078 cx,
3079 )
3080 });
3081
3082 (buffer_handle, diff, None)
3083 }
3084 } else {
3085 // Reuse an existing buffer
3086 let buffer_handle = buffers.choose(&mut rng).unwrap().clone();
3087 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3088
3089 if let Some(diff) = inverted_diff_main_buffers.get(&buffer_id) {
3090 let base_text_buffer =
3091 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3092 (base_text_buffer, diff.clone(), Some(buffer_handle))
3093 } else {
3094 // Get existing diff or create new one for regular buffer
3095 let diff = multibuffer
3096 .read_with(cx, |mb, _| mb.diff_for(buffer_id))
3097 .unwrap_or_else(|| {
3098 let base_text = base_texts.get(&buffer_id).unwrap();
3099 cx.new(|cx| {
3100 BufferDiff::new_with_base_text(
3101 base_text,
3102 &buffer_handle.read(cx).text_snapshot(),
3103 cx,
3104 )
3105 })
3106 });
3107 (buffer_handle, diff, None)
3108 }
3109 };
3110
3111 let excerpt_buffer_snapshot =
3112 excerpt_buffer.read_with(cx, |excerpt_buffer, _| excerpt_buffer.snapshot());
3113 let mut ranges = reference
3114 .excerpts
3115 .iter()
3116 .filter(|excerpt| excerpt.buffer == excerpt_buffer)
3117 .map(|excerpt| excerpt.range.to_point(&excerpt_buffer_snapshot))
3118 .collect::<Vec<_>>();
3119 mutate_excerpt_ranges(&mut rng, &mut ranges, &excerpt_buffer_snapshot, 1);
3120 let ranges = ranges
3121 .iter()
3122 .cloned()
3123 .map(ExcerptRange::new)
3124 .collect::<Vec<_>>();
3125 let path = cx.update(|cx| PathKey::for_buffer(&excerpt_buffer, cx));
3126
3127 let (_, path_key_index, _) = multibuffer.update(cx, |multibuffer, cx| {
3128 multibuffer.set_excerpt_ranges_for_path(
3129 path.clone(),
3130 excerpt_buffer.clone(),
3131 &excerpt_buffer_snapshot,
3132 ranges.clone(),
3133 cx,
3134 )
3135 });
3136
3137 reference.set_excerpts(
3138 path,
3139 path_key_index,
3140 excerpt_buffer.clone(),
3141 &excerpt_buffer_snapshot,
3142 ranges,
3143 );
3144
3145 let excerpt_buffer_id =
3146 excerpt_buffer.read_with(cx, |buffer, _| buffer.remote_id());
3147 multibuffer.update(cx, |multibuffer, cx| {
3148 if multibuffer.diff_for(excerpt_buffer_id).is_none() {
3149 if let Some(main_buffer) = inverted_main_buffer {
3150 reference.add_inverted_diff(diff.clone(), main_buffer.clone(), cx);
3151 multibuffer.add_inverted_diff(diff, main_buffer, cx);
3152 } else {
3153 reference.add_diff(diff.clone(), cx);
3154 multibuffer.add_diff(diff, cx);
3155 }
3156 }
3157 });
3158 }
3159 }
3160
3161 if rng.random_bool(0.3) {
3162 multibuffer.update(cx, |multibuffer, cx| {
3163 old_versions.push((multibuffer.snapshot(cx), multibuffer.subscribe()));
3164 })
3165 }
3166
3167 multibuffer.read_with(cx, |multibuffer, cx| {
3168 check_multibuffer(multibuffer, &reference, &anchors, cx, &mut rng);
3169 });
3170 }
3171 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
3172 for (old_snapshot, subscription) in old_versions {
3173 check_multibuffer_edits(&snapshot, &old_snapshot, subscription);
3174 }
3175}
3176
3177fn mutate_excerpt_ranges(
3178 rng: &mut StdRng,
3179 existing_ranges: &mut Vec<Range<Point>>,
3180 buffer: &BufferSnapshot,
3181 operations: u32,
3182) {
3183 let mut ranges_to_add = Vec::new();
3184
3185 for _ in 0..operations {
3186 // todo!() logging
3187 match rng.random_range(0..5) {
3188 0..=1 if !existing_ranges.is_empty() => {
3189 log::info!("Removing excerpt",);
3190 let index = rng.random_range(0..existing_ranges.len());
3191 existing_ranges.remove(index);
3192 }
3193 _ => {
3194 log::info!("Inserting excerpt",);
3195 let end_row = rng.random_range(0..=buffer.max_point().row);
3196 let start_row = rng.random_range(0..=end_row);
3197 ranges_to_add.push(Point::new(start_row, 0)..Point::new(end_row, 0));
3198 }
3199 }
3200 }
3201
3202 existing_ranges.extend(ranges_to_add);
3203 existing_ranges.sort_by(|l, r| l.start.cmp(&r.start));
3204}
3205
3206fn check_multibuffer(
3207 multibuffer: &MultiBuffer,
3208 reference: &ReferenceMultibuffer,
3209 anchors: &[Anchor],
3210 cx: &App,
3211 rng: &mut StdRng,
3212) {
3213 let snapshot = multibuffer.snapshot(cx);
3214 let actual_text = snapshot.text();
3215 let actual_boundary_rows = snapshot
3216 .excerpt_boundaries_in_range(MultiBufferOffset(0)..)
3217 .map(|b| b.row)
3218 .collect::<HashSet<_>>();
3219 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
3220
3221 let (expected_text, expected_row_infos, expected_boundary_rows) =
3222 reference.expected_content(cx);
3223
3224 let has_diff = actual_row_infos
3225 .iter()
3226 .any(|info| info.diff_status.is_some())
3227 || expected_row_infos
3228 .iter()
3229 .any(|info| info.diff_status.is_some());
3230 let actual_diff = format_diff(
3231 &actual_text,
3232 &actual_row_infos,
3233 &actual_boundary_rows,
3234 Some(has_diff),
3235 );
3236 let expected_diff = format_diff(
3237 &expected_text,
3238 &expected_row_infos,
3239 &expected_boundary_rows,
3240 Some(has_diff),
3241 );
3242
3243 log::info!("Multibuffer content:\n{}", actual_diff);
3244
3245 assert_eq!(
3246 actual_row_infos.len(),
3247 actual_text.split('\n').count(),
3248 "line count: {}",
3249 actual_text.split('\n').count()
3250 );
3251 pretty_assertions::assert_eq!(actual_diff, expected_diff);
3252 pretty_assertions::assert_eq!(actual_text, expected_text);
3253 pretty_assertions::assert_eq!(actual_row_infos, expected_row_infos);
3254
3255 for _ in 0..5 {
3256 let start_row = rng.random_range(0..=expected_row_infos.len());
3257 assert_eq!(
3258 snapshot
3259 .row_infos(MultiBufferRow(start_row as u32))
3260 .collect::<Vec<_>>(),
3261 &expected_row_infos[start_row..],
3262 "buffer_rows({})",
3263 start_row
3264 );
3265 }
3266
3267 assert_eq!(
3268 snapshot.widest_line_number(),
3269 expected_row_infos
3270 .into_iter()
3271 .filter_map(|info| {
3272 // For inverted diffs, deleted rows are visible and should be counted.
3273 // Only filter out deleted rows that are NOT from inverted diffs.
3274 let is_inverted_diff = info
3275 .buffer_id
3276 .is_some_and(|id| reference.inverted_diffs.contains_key(&id));
3277 if info.diff_status.is_some_and(|status| status.is_deleted()) && !is_inverted_diff {
3278 None
3279 } else {
3280 info.buffer_row
3281 }
3282 })
3283 .max()
3284 .unwrap()
3285 + 1
3286 );
3287 for i in 0..snapshot.len().0 {
3288 // todo!() this seems not useful
3289 let excerpt = snapshot
3290 .excerpt_containing(MultiBufferOffset(i)..MultiBufferOffset(i))
3291 .unwrap();
3292 let reference_range = reference
3293 .excerpts
3294 .iter()
3295 .find(|reference_excerpt| reference_excerpt.info(cx) == excerpt.excerpt.info())
3296 .map(|excerpt| excerpt.range.to_offset(&excerpt.buffer.read(cx).snapshot()))
3297 .expect("corresponding excerpt should exist in reference multibuffer");
3298 assert_eq!(
3299 excerpt.buffer_range(&snapshot).start.0..excerpt.buffer_range(&snapshot).end.0,
3300 reference_range
3301 );
3302 }
3303
3304 assert_consistent_line_numbers(&snapshot);
3305 assert_position_translation(&snapshot);
3306
3307 for (row, line) in expected_text.split('\n').enumerate() {
3308 assert_eq!(
3309 snapshot.line_len(MultiBufferRow(row as u32)),
3310 line.len() as u32,
3311 "line_len({}).",
3312 row
3313 );
3314 }
3315
3316 let text_rope = Rope::from(expected_text.as_str());
3317 for _ in 0..10 {
3318 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3319 let start_ix = text_rope.clip_offset(rng.random_range(0..=end_ix), Bias::Left);
3320
3321 let text_for_range = snapshot
3322 .text_for_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3323 .collect::<String>();
3324 assert_eq!(
3325 text_for_range,
3326 &expected_text[start_ix..end_ix],
3327 "incorrect text for range {:?}",
3328 start_ix..end_ix
3329 );
3330
3331 let expected_summary =
3332 MBTextSummary::from(TextSummary::from(&expected_text[start_ix..end_ix]));
3333 assert_eq!(
3334 snapshot.text_summary_for_range::<MBTextSummary, _>(
3335 MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix)
3336 ),
3337 expected_summary,
3338 "incorrect summary for range {:?}",
3339 start_ix..end_ix
3340 );
3341 }
3342
3343 // Anchor resolution
3344 let summaries = snapshot.summaries_for_anchors::<MultiBufferOffset, _>(anchors);
3345 assert_eq!(anchors.len(), summaries.len());
3346 for (anchor, resolved_offset) in anchors.iter().zip(summaries) {
3347 assert!(resolved_offset <= snapshot.len());
3348 assert_eq!(
3349 snapshot.summary_for_anchor::<MultiBufferOffset>(anchor),
3350 resolved_offset,
3351 "anchor: {:?}",
3352 anchor
3353 );
3354 }
3355
3356 for _ in 0..10 {
3357 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3358 assert_eq!(
3359 snapshot
3360 .reversed_chars_at(MultiBufferOffset(end_ix))
3361 .collect::<String>(),
3362 expected_text[..end_ix].chars().rev().collect::<String>(),
3363 );
3364 }
3365
3366 for _ in 0..10 {
3367 let end_ix = rng.random_range(0..=text_rope.len());
3368 let end_ix = text_rope.floor_char_boundary(end_ix);
3369 let start_ix = rng.random_range(0..=end_ix);
3370 let start_ix = text_rope.floor_char_boundary(start_ix);
3371 assert_eq!(
3372 snapshot
3373 .bytes_in_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3374 .flatten()
3375 .copied()
3376 .collect::<Vec<_>>(),
3377 expected_text.as_bytes()[start_ix..end_ix].to_vec(),
3378 "bytes_in_range({:?})",
3379 start_ix..end_ix,
3380 );
3381 }
3382}
3383
3384fn check_multibuffer_edits(
3385 snapshot: &MultiBufferSnapshot,
3386 old_snapshot: &MultiBufferSnapshot,
3387 subscription: Subscription<MultiBufferOffset>,
3388) {
3389 let edits = subscription.consume().into_inner();
3390
3391 log::info!(
3392 "applying subscription edits to old text: {:?}: {:#?}",
3393 old_snapshot.text(),
3394 edits,
3395 );
3396
3397 let mut text = old_snapshot.text();
3398 for edit in edits {
3399 let new_text: String = snapshot
3400 .text_for_range(edit.new.start..edit.new.end)
3401 .collect();
3402 text.replace_range(
3403 (edit.new.start.0..edit.new.start.0 + (edit.old.end.0 - edit.old.start.0)).clone(),
3404 &new_text,
3405 );
3406 pretty_assertions::assert_eq!(
3407 &text[0..edit.new.end.0],
3408 snapshot
3409 .text_for_range(MultiBufferOffset(0)..edit.new.end)
3410 .collect::<String>()
3411 );
3412 }
3413 pretty_assertions::assert_eq!(text, snapshot.text());
3414}
3415
3416#[gpui::test]
3417fn test_history(cx: &mut App) {
3418 let test_settings = SettingsStore::test(cx);
3419 cx.set_global(test_settings);
3420
3421 let group_interval: Duration = Duration::from_millis(1);
3422 let buffer_1 = cx.new(|cx| {
3423 let mut buf = Buffer::local("1234", cx);
3424 buf.set_group_interval(group_interval);
3425 buf
3426 });
3427 let buffer_2 = cx.new(|cx| {
3428 let mut buf = Buffer::local("5678", cx);
3429 buf.set_group_interval(group_interval);
3430 buf
3431 });
3432 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
3433 multibuffer.update(cx, |this, _| {
3434 this.set_group_interval(group_interval);
3435 });
3436 multibuffer.update(cx, |multibuffer, cx| {
3437 multibuffer.set_excerpts_for_path(
3438 PathKey::sorted(0),
3439 buffer_1.clone(),
3440 [Point::zero()..buffer_1.read(cx).max_point()],
3441 0,
3442 cx,
3443 );
3444 multibuffer.set_excerpts_for_path(
3445 PathKey::sorted(1),
3446 buffer_2.clone(),
3447 [Point::zero()..buffer_2.read(cx).max_point()],
3448 0,
3449 cx,
3450 );
3451 });
3452
3453 let mut now = Instant::now();
3454
3455 multibuffer.update(cx, |multibuffer, cx| {
3456 let transaction_1 = multibuffer.start_transaction_at(now, cx).unwrap();
3457 multibuffer.edit(
3458 [
3459 (Point::new(0, 0)..Point::new(0, 0), "A"),
3460 (Point::new(1, 0)..Point::new(1, 0), "A"),
3461 ],
3462 None,
3463 cx,
3464 );
3465 multibuffer.edit(
3466 [
3467 (Point::new(0, 1)..Point::new(0, 1), "B"),
3468 (Point::new(1, 1)..Point::new(1, 1), "B"),
3469 ],
3470 None,
3471 cx,
3472 );
3473 multibuffer.end_transaction_at(now, cx);
3474 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3475
3476 // Verify edited ranges for transaction 1
3477 assert_eq!(
3478 multibuffer.edited_ranges_for_transaction(transaction_1, cx),
3479 &[
3480 MultiBufferOffset(0)..MultiBufferOffset(2),
3481 MultiBufferOffset(7)..MultiBufferOffset(9),
3482 ]
3483 );
3484
3485 // Edit buffer 1 through the multibuffer
3486 now += 2 * group_interval;
3487 multibuffer.start_transaction_at(now, cx);
3488 multibuffer.edit(
3489 [(MultiBufferOffset(2)..MultiBufferOffset(2), "C")],
3490 None,
3491 cx,
3492 );
3493 multibuffer.end_transaction_at(now, cx);
3494 assert_eq!(multibuffer.read(cx).text(), "ABC1234\nAB5678");
3495
3496 // Edit buffer 1 independently
3497 buffer_1.update(cx, |buffer_1, cx| {
3498 buffer_1.start_transaction_at(now);
3499 buffer_1.edit([(3..3, "D")], None, cx);
3500 buffer_1.end_transaction_at(now, cx);
3501
3502 now += 2 * group_interval;
3503 buffer_1.start_transaction_at(now);
3504 buffer_1.edit([(4..4, "E")], None, cx);
3505 buffer_1.end_transaction_at(now, cx);
3506 });
3507 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3508
3509 // An undo in the multibuffer undoes the multibuffer transaction
3510 // and also any individual buffer edits that have occurred since
3511 // that transaction.
3512 multibuffer.undo(cx);
3513 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3514
3515 multibuffer.undo(cx);
3516 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3517
3518 multibuffer.redo(cx);
3519 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3520
3521 multibuffer.redo(cx);
3522 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3523
3524 // Undo buffer 2 independently.
3525 buffer_2.update(cx, |buffer_2, cx| buffer_2.undo(cx));
3526 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\n5678");
3527
3528 // An undo in the multibuffer undoes the components of the
3529 // the last multibuffer transaction that are not already undone.
3530 multibuffer.undo(cx);
3531 assert_eq!(multibuffer.read(cx).text(), "AB1234\n5678");
3532
3533 multibuffer.undo(cx);
3534 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3535
3536 multibuffer.redo(cx);
3537 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3538
3539 buffer_1.update(cx, |buffer_1, cx| buffer_1.redo(cx));
3540 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3541
3542 // Redo stack gets cleared after an edit.
3543 now += 2 * group_interval;
3544 multibuffer.start_transaction_at(now, cx);
3545 multibuffer.edit(
3546 [(MultiBufferOffset(0)..MultiBufferOffset(0), "X")],
3547 None,
3548 cx,
3549 );
3550 multibuffer.end_transaction_at(now, cx);
3551 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3552 multibuffer.redo(cx);
3553 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3554 multibuffer.undo(cx);
3555 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3556 multibuffer.undo(cx);
3557 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3558
3559 // Transactions can be grouped manually.
3560 multibuffer.redo(cx);
3561 multibuffer.redo(cx);
3562 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3563 multibuffer.group_until_transaction(transaction_1, cx);
3564 multibuffer.undo(cx);
3565 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3566 multibuffer.redo(cx);
3567 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3568 });
3569}
3570
3571#[gpui::test]
3572async fn test_enclosing_indent(cx: &mut TestAppContext) {
3573 async fn enclosing_indent(
3574 text: &str,
3575 buffer_row: u32,
3576 cx: &mut TestAppContext,
3577 ) -> Option<(Range<u32>, LineIndent)> {
3578 let buffer = cx.update(|cx| MultiBuffer::build_simple(text, cx));
3579 let snapshot = cx.read(|cx| buffer.read(cx).snapshot(cx));
3580 let (range, indent) = snapshot
3581 .enclosing_indent(MultiBufferRow(buffer_row))
3582 .await?;
3583 Some((range.start.0..range.end.0, indent))
3584 }
3585
3586 assert_eq!(
3587 enclosing_indent(
3588 indoc!(
3589 "
3590 fn b() {
3591 if c {
3592 let d = 2;
3593 }
3594 }
3595 "
3596 ),
3597 1,
3598 cx,
3599 )
3600 .await,
3601 Some((
3602 1..2,
3603 LineIndent {
3604 tabs: 0,
3605 spaces: 4,
3606 line_blank: false,
3607 }
3608 ))
3609 );
3610
3611 assert_eq!(
3612 enclosing_indent(
3613 indoc!(
3614 "
3615 fn b() {
3616 if c {
3617 let d = 2;
3618 }
3619 }
3620 "
3621 ),
3622 2,
3623 cx,
3624 )
3625 .await,
3626 Some((
3627 1..2,
3628 LineIndent {
3629 tabs: 0,
3630 spaces: 4,
3631 line_blank: false,
3632 }
3633 ))
3634 );
3635
3636 assert_eq!(
3637 enclosing_indent(
3638 indoc!(
3639 "
3640 fn b() {
3641 if c {
3642 let d = 2;
3643
3644 let e = 5;
3645 }
3646 }
3647 "
3648 ),
3649 3,
3650 cx,
3651 )
3652 .await,
3653 Some((
3654 1..4,
3655 LineIndent {
3656 tabs: 0,
3657 spaces: 4,
3658 line_blank: false,
3659 }
3660 ))
3661 );
3662}
3663
3664#[gpui::test]
3665async fn test_summaries_for_anchors(cx: &mut TestAppContext) {
3666 let base_text_1 = indoc!(
3667 "
3668 bar
3669 "
3670 );
3671 let text_1 = indoc!(
3672 "
3673 BAR
3674 "
3675 );
3676 let base_text_2 = indoc!(
3677 "
3678 foo
3679 "
3680 );
3681 let text_2 = indoc!(
3682 "
3683 FOO
3684 "
3685 );
3686
3687 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3688 let buffer_2 = cx.new(|cx| Buffer::local(text_2, cx));
3689 let diff_1 = cx.new(|cx| {
3690 BufferDiff::new_with_base_text(base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3691 });
3692 let diff_2 = cx.new(|cx| {
3693 BufferDiff::new_with_base_text(base_text_2, &buffer_2.read(cx).text_snapshot(), cx)
3694 });
3695 cx.run_until_parked();
3696
3697 let multibuffer = cx.new(|cx| {
3698 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3699 multibuffer.set_all_diff_hunks_expanded(cx);
3700 multibuffer.set_excerpts_for_path(
3701 PathKey::sorted(0),
3702 buffer_1.clone(),
3703 [Point::zero()..buffer_1.read(cx).max_point()],
3704 0,
3705 cx,
3706 );
3707 multibuffer.set_excerpts_for_path(
3708 PathKey::sorted(1),
3709 buffer_2.clone(),
3710 [Point::zero()..buffer_2.read(cx).max_point()],
3711 0,
3712 cx,
3713 );
3714 multibuffer.add_diff(diff_1.clone(), cx);
3715 multibuffer.add_diff(diff_2.clone(), cx);
3716 multibuffer
3717 });
3718
3719 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3720 (multibuffer.snapshot(cx), multibuffer.subscribe())
3721 });
3722
3723 assert_new_snapshot(
3724 &multibuffer,
3725 &mut snapshot,
3726 &mut subscription,
3727 cx,
3728 indoc!(
3729 "
3730 - bar
3731 + BAR
3732
3733 - foo
3734 + FOO
3735 "
3736 ),
3737 );
3738
3739 let anchor_1 = multibuffer.read_with(cx, |multibuffer, cx| {
3740 multibuffer
3741 .buffer_anchor_to_anchor(
3742 &buffer_1,
3743 text::Anchor::min_for_buffer(buffer_1.read(cx).remote_id()),
3744 cx,
3745 )
3746 .unwrap()
3747 });
3748 let point_1 = snapshot.summaries_for_anchors::<Point, _>([&anchor_1])[0];
3749 assert_eq!(point_1, Point::new(0, 0));
3750
3751 let anchor_2 = multibuffer.read_with(cx, |multibuffer, cx| {
3752 multibuffer
3753 .buffer_anchor_to_anchor(
3754 &buffer_2,
3755 text::Anchor::min_for_buffer(buffer_2.read(cx).remote_id()),
3756 cx,
3757 )
3758 .unwrap()
3759 });
3760 let point_2 = snapshot.summaries_for_anchors::<Point, _>([&anchor_2])[0];
3761 assert_eq!(point_2, Point::new(3, 0));
3762}
3763
3764#[gpui::test]
3765async fn test_trailing_deletion_without_newline(cx: &mut TestAppContext) {
3766 let base_text_1 = "one\ntwo".to_owned();
3767 let text_1 = "one\n".to_owned();
3768
3769 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3770 let diff_1 = cx.new(|cx| {
3771 BufferDiff::new_with_base_text(&base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3772 });
3773 cx.run_until_parked();
3774
3775 let multibuffer = cx.new(|cx| {
3776 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3777 multibuffer.set_excerpts_for_path(
3778 PathKey::sorted(0),
3779 buffer_1.clone(),
3780 [Point::zero()..buffer_1.read(cx).max_point()],
3781 0,
3782 cx,
3783 );
3784 multibuffer.add_diff(diff_1.clone(), cx);
3785 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
3786 multibuffer
3787 });
3788
3789 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3790 (multibuffer.snapshot(cx), multibuffer.subscribe())
3791 });
3792
3793 assert_new_snapshot(
3794 &multibuffer,
3795 &mut snapshot,
3796 &mut subscription,
3797 cx,
3798 indoc!(
3799 "
3800 one
3801 - two
3802 "
3803 ),
3804 );
3805
3806 assert_eq!(snapshot.max_point(), Point::new(2, 0));
3807 assert_eq!(snapshot.len().0, 8);
3808
3809 assert_eq!(
3810 snapshot
3811 .dimensions_from_points::<Point>([Point::new(2, 0)])
3812 .collect::<Vec<_>>(),
3813 vec![Point::new(2, 0)]
3814 );
3815
3816 let (_, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3817 assert_eq!(translated_offset.0, "one\n".len());
3818 let (_, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3819 assert_eq!(translated_point, Point::new(1, 0));
3820
3821 // The same, for an excerpt that's not at the end of the multibuffer.
3822
3823 let text_2 = "foo\n".to_owned();
3824 let buffer_2 = cx.new(|cx| Buffer::local(&text_2, cx));
3825 multibuffer.update(cx, |multibuffer, cx| {
3826 multibuffer.set_excerpt_ranges_for_path(
3827 PathKey::sorted(1),
3828 buffer_2.clone(),
3829 &buffer_2.read(cx).snapshot(),
3830 vec![ExcerptRange::new(Point::new(0, 0)..Point::new(1, 0))],
3831 cx,
3832 );
3833 });
3834
3835 assert_new_snapshot(
3836 &multibuffer,
3837 &mut snapshot,
3838 &mut subscription,
3839 cx,
3840 indoc!(
3841 "
3842 one
3843 - two
3844
3845 foo
3846 "
3847 ),
3848 );
3849
3850 assert_eq!(
3851 snapshot
3852 .dimensions_from_points::<Point>([Point::new(2, 0)])
3853 .collect::<Vec<_>>(),
3854 vec![Point::new(2, 0)]
3855 );
3856
3857 let buffer_1_id = buffer_1.read_with(cx, |buffer_1, _| buffer_1.remote_id());
3858 let (buffer, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3859 assert_eq!(buffer.remote_id(), buffer_1_id);
3860 assert_eq!(translated_offset.0, "one\n".len());
3861 let (buffer, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3862 assert_eq!(buffer.remote_id(), buffer_1_id);
3863 assert_eq!(translated_point, Point::new(1, 0));
3864}
3865
3866fn format_diff(
3867 text: &str,
3868 row_infos: &Vec<RowInfo>,
3869 boundary_rows: &HashSet<MultiBufferRow>,
3870 has_diff: Option<bool>,
3871) -> String {
3872 let has_diff =
3873 has_diff.unwrap_or_else(|| row_infos.iter().any(|info| info.diff_status.is_some()));
3874 text.split('\n')
3875 .enumerate()
3876 .zip(row_infos)
3877 .map(|((ix, line), info)| {
3878 let marker = match info.diff_status.map(|status| status.kind) {
3879 Some(DiffHunkStatusKind::Added) => "+ ",
3880 Some(DiffHunkStatusKind::Deleted) => "- ",
3881 Some(DiffHunkStatusKind::Modified) => unreachable!(),
3882 None => {
3883 if has_diff && !line.is_empty() {
3884 " "
3885 } else {
3886 ""
3887 }
3888 }
3889 };
3890 let boundary_row = if boundary_rows.contains(&MultiBufferRow(ix as u32)) {
3891 if has_diff {
3892 " ----------\n"
3893 } else {
3894 "---------\n"
3895 }
3896 } else {
3897 ""
3898 };
3899 let expand = info
3900 .expand_info
3901 .as_ref()
3902 .map(|expand_info| match expand_info.direction {
3903 ExpandExcerptDirection::Up => " [↑]",
3904 ExpandExcerptDirection::Down => " [↓]",
3905 ExpandExcerptDirection::UpAndDown => " [↕]",
3906 })
3907 .unwrap_or_default();
3908
3909 format!("{boundary_row}{marker}{line}{expand}")
3910 // let mbr = info
3911 // .multibuffer_row
3912 // .map(|row| format!("{:0>3}", row.0))
3913 // .unwrap_or_else(|| "???".to_string());
3914 // let byte_range = format!("{byte_range_start:0>3}..{byte_range_end:0>3}");
3915 // format!("{boundary_row}Row: {mbr}, Bytes: {byte_range} | {marker}{line}{expand}")
3916 })
3917 .collect::<Vec<_>>()
3918 .join("\n")
3919}
3920
3921// fn format_transforms(snapshot: &MultiBufferSnapshot) -> String {
3922// snapshot
3923// .diff_transforms
3924// .iter()
3925// .map(|transform| {
3926// let (kind, summary) = match transform {
3927// DiffTransform::DeletedHunk { summary, .. } => (" Deleted", (*summary).into()),
3928// DiffTransform::FilteredInsertedHunk { summary, .. } => (" Filtered", *summary),
3929// DiffTransform::InsertedHunk { summary, .. } => (" Inserted", *summary),
3930// DiffTransform::Unmodified { summary, .. } => ("Unmodified", *summary),
3931// };
3932// format!("{kind}(len: {}, lines: {:?})", summary.len, summary.lines)
3933// })
3934// .join("\n")
3935// }
3936
3937// fn format_excerpts(snapshot: &MultiBufferSnapshot) -> String {
3938// snapshot
3939// .excerpts
3940// .iter()
3941// .map(|excerpt| {
3942// format!(
3943// "Excerpt(buffer_range = {:?}, lines = {:?}, has_trailing_newline = {:?})",
3944// excerpt.range.context.to_point(&excerpt.buffer),
3945// excerpt.text_summary.lines,
3946// excerpt.has_trailing_newline
3947// )
3948// })
3949// .join("\n")
3950// }
3951
3952#[gpui::test]
3953async fn test_singleton_with_inverted_diff(cx: &mut TestAppContext) {
3954 let text = indoc!(
3955 "
3956 ZERO
3957 one
3958 TWO
3959 three
3960 six
3961 "
3962 );
3963 let base_text = indoc!(
3964 "
3965 one
3966 two
3967 three
3968 four
3969 five
3970 six
3971 "
3972 );
3973
3974 let buffer = cx.new(|cx| Buffer::local(text, cx));
3975 let diff = cx
3976 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
3977 cx.run_until_parked();
3978
3979 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3980
3981 let multibuffer = cx.new(|cx| {
3982 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
3983 multibuffer.set_all_diff_hunks_expanded(cx);
3984 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
3985 multibuffer
3986 });
3987
3988 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3989 (multibuffer.snapshot(cx), multibuffer.subscribe())
3990 });
3991
3992 assert_eq!(snapshot.text(), base_text);
3993 assert_new_snapshot(
3994 &multibuffer,
3995 &mut snapshot,
3996 &mut subscription,
3997 cx,
3998 indoc!(
3999 "
4000 one
4001 - two
4002 three
4003 - four
4004 - five
4005 six
4006 "
4007 ),
4008 );
4009
4010 buffer.update(cx, |buffer, cx| {
4011 buffer.edit_via_marked_text(
4012 indoc!(
4013 "
4014 ZERO
4015 one
4016 «<inserted>»W«O
4017 T»hree
4018 six
4019 "
4020 ),
4021 None,
4022 cx,
4023 );
4024 });
4025 cx.run_until_parked();
4026 let update = diff
4027 .update(cx, |diff, cx| {
4028 diff.update_diff(
4029 buffer.read(cx).text_snapshot(),
4030 Some(base_text.into()),
4031 None,
4032 None,
4033 cx,
4034 )
4035 })
4036 .await;
4037 diff.update(cx, |diff, cx| {
4038 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4039 })
4040 .await;
4041 cx.run_until_parked();
4042
4043 assert_new_snapshot(
4044 &multibuffer,
4045 &mut snapshot,
4046 &mut subscription,
4047 cx,
4048 indoc! {
4049 "
4050 one
4051 - two
4052 - three
4053 - four
4054 - five
4055 six
4056 "
4057 },
4058 );
4059
4060 buffer.update(cx, |buffer, cx| {
4061 buffer.set_text("ZERO\nONE\nTWO\n", cx);
4062 });
4063 cx.run_until_parked();
4064 let update = diff
4065 .update(cx, |diff, cx| {
4066 diff.update_diff(
4067 buffer.read(cx).text_snapshot(),
4068 Some(base_text.into()),
4069 None,
4070 None,
4071 cx,
4072 )
4073 })
4074 .await;
4075 diff.update(cx, |diff, cx| {
4076 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4077 })
4078 .await;
4079 cx.run_until_parked();
4080
4081 assert_new_snapshot(
4082 &multibuffer,
4083 &mut snapshot,
4084 &mut subscription,
4085 cx,
4086 indoc! {
4087 "
4088 - one
4089 - two
4090 - three
4091 - four
4092 - five
4093 - six
4094 "
4095 },
4096 );
4097
4098 diff.update(cx, |diff, cx| {
4099 diff.set_base_text(
4100 Some("new base\n".into()),
4101 None,
4102 buffer.read(cx).text_snapshot(),
4103 cx,
4104 )
4105 })
4106 .await
4107 .unwrap();
4108 cx.run_until_parked();
4109
4110 assert_new_snapshot(
4111 &multibuffer,
4112 &mut snapshot,
4113 &mut subscription,
4114 cx,
4115 indoc! {"
4116 - new base
4117 "},
4118 );
4119}
4120
4121#[gpui::test]
4122async fn test_inverted_diff_base_text_change(cx: &mut TestAppContext) {
4123 let base_text = "aaa\nbbb\nccc\n";
4124 let text = "ddd\n";
4125 let buffer = cx.new(|cx| Buffer::local(text, cx));
4126 let diff = cx
4127 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4128 cx.run_until_parked();
4129
4130 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4131
4132 let multibuffer = cx.new(|cx| {
4133 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4134 multibuffer.set_all_diff_hunks_expanded(cx);
4135 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
4136 multibuffer
4137 });
4138
4139 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
4140 (multibuffer.snapshot(cx), multibuffer.subscribe())
4141 });
4142
4143 assert_eq!(snapshot.text(), base_text);
4144 assert_new_snapshot(
4145 &multibuffer,
4146 &mut snapshot,
4147 &mut subscription,
4148 cx,
4149 indoc!(
4150 "
4151 - aaa
4152 - bbb
4153 - ccc
4154 "
4155 ),
4156 );
4157
4158 let update = diff
4159 .update(cx, |diff, cx| {
4160 diff.update_diff(
4161 buffer.read(cx).text_snapshot(),
4162 Some("ddd\n".into()),
4163 Some(true),
4164 None,
4165 cx,
4166 )
4167 })
4168 .await;
4169 diff.update(cx, |diff, cx| {
4170 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4171 })
4172 .detach();
4173
4174 let _hunks: Vec<_> = multibuffer
4175 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4176 .diff_hunks()
4177 .collect();
4178}
4179
4180#[gpui::test]
4181async fn test_inverted_diff_secondary_version_mismatch(cx: &mut TestAppContext) {
4182 let base_text = "one\ntwo\nthree\nfour\nfive\n";
4183 let index_text = "one\nTWO\nthree\nfour\nfive\n";
4184 let buffer_text = "one\nTWO\nthree\nFOUR\nfive\n";
4185
4186 let buffer = cx.new(|cx| Buffer::local(buffer_text, cx));
4187
4188 let unstaged_diff = cx
4189 .new(|cx| BufferDiff::new_with_base_text(index_text, &buffer.read(cx).text_snapshot(), cx));
4190 cx.run_until_parked();
4191
4192 let uncommitted_diff = cx.new(|cx| {
4193 let mut diff =
4194 BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx);
4195 diff.set_secondary_diff(unstaged_diff.clone());
4196 diff
4197 });
4198 cx.run_until_parked();
4199
4200 buffer.update(cx, |buffer, cx| {
4201 buffer.edit([(0..0, "ZERO\n")], None, cx);
4202 });
4203
4204 let update = unstaged_diff
4205 .update(cx, |diff, cx| {
4206 diff.update_diff(
4207 buffer.read(cx).text_snapshot(),
4208 Some(index_text.into()),
4209 None,
4210 None,
4211 cx,
4212 )
4213 })
4214 .await;
4215 unstaged_diff
4216 .update(cx, |diff, cx| {
4217 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4218 })
4219 .await;
4220
4221 let base_text_buffer =
4222 uncommitted_diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4223
4224 let multibuffer = cx.new(|cx| {
4225 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4226 multibuffer.set_all_diff_hunks_expanded(cx);
4227 multibuffer.add_inverted_diff(uncommitted_diff.clone(), buffer.clone(), cx);
4228 multibuffer
4229 });
4230
4231 let _hunks: Vec<_> = multibuffer
4232 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4233 .diff_hunks()
4234 .collect();
4235}
4236
4237#[track_caller]
4238fn assert_excerpts_match(
4239 multibuffer: &Entity<MultiBuffer>,
4240 cx: &mut TestAppContext,
4241 expected: &str,
4242) {
4243 let mut output = String::new();
4244 multibuffer.read_with(cx, |multibuffer, cx| {
4245 for (buffer, info) in multibuffer.snapshot(cx).excerpts() {
4246 output.push_str("-----\n");
4247 output.extend(buffer.text_for_range(info.range));
4248 if !output.ends_with('\n') {
4249 output.push('\n');
4250 }
4251 }
4252 });
4253 assert_eq!(output, expected);
4254}
4255
4256#[track_caller]
4257fn assert_new_snapshot(
4258 multibuffer: &Entity<MultiBuffer>,
4259 snapshot: &mut MultiBufferSnapshot,
4260 subscription: &mut Subscription<MultiBufferOffset>,
4261 cx: &mut TestAppContext,
4262 expected_diff: &str,
4263) {
4264 let new_snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4265 let actual_text = new_snapshot.text();
4266 let line_infos = new_snapshot
4267 .row_infos(MultiBufferRow(0))
4268 .collect::<Vec<_>>();
4269 let actual_diff = format_diff(&actual_text, &line_infos, &Default::default(), None);
4270 pretty_assertions::assert_eq!(actual_diff, expected_diff);
4271 check_edits(
4272 snapshot,
4273 &new_snapshot,
4274 &subscription.consume().into_inner(),
4275 );
4276 *snapshot = new_snapshot;
4277}
4278
4279#[track_caller]
4280fn check_edits(
4281 old_snapshot: &MultiBufferSnapshot,
4282 new_snapshot: &MultiBufferSnapshot,
4283 edits: &[Edit<MultiBufferOffset>],
4284) {
4285 let mut text = old_snapshot.text();
4286 let new_text = new_snapshot.text();
4287 for edit in edits.iter().rev() {
4288 if !text.is_char_boundary(edit.old.start.0)
4289 || !text.is_char_boundary(edit.old.end.0)
4290 || !new_text.is_char_boundary(edit.new.start.0)
4291 || !new_text.is_char_boundary(edit.new.end.0)
4292 {
4293 panic!(
4294 "invalid edits: {:?}\nold text: {:?}\nnew text: {:?}",
4295 edits, text, new_text
4296 );
4297 }
4298
4299 text.replace_range(
4300 edit.old.start.0..edit.old.end.0,
4301 &new_text[edit.new.start.0..edit.new.end.0],
4302 );
4303 }
4304
4305 pretty_assertions::assert_eq!(text, new_text, "invalid edits: {:?}", edits);
4306}
4307
4308#[track_caller]
4309fn assert_chunks_in_ranges(snapshot: &MultiBufferSnapshot) {
4310 let full_text = snapshot.text();
4311 for ix in 0..full_text.len() {
4312 let mut chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4313 chunks.seek(MultiBufferOffset(ix)..snapshot.len());
4314 let tail = chunks.map(|chunk| chunk.text).collect::<String>();
4315 assert_eq!(tail, &full_text[ix..], "seek to range: {:?}", ix..);
4316 }
4317}
4318
4319#[track_caller]
4320fn assert_consistent_line_numbers(snapshot: &MultiBufferSnapshot) {
4321 let all_line_numbers = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
4322 for start_row in 1..all_line_numbers.len() {
4323 let line_numbers = snapshot
4324 .row_infos(MultiBufferRow(start_row as u32))
4325 .collect::<Vec<_>>();
4326 assert_eq!(
4327 line_numbers,
4328 all_line_numbers[start_row..],
4329 "start_row: {start_row}"
4330 );
4331 }
4332}
4333
4334#[track_caller]
4335fn assert_position_translation(snapshot: &MultiBufferSnapshot) {
4336 let text = Rope::from(snapshot.text());
4337
4338 let mut left_anchors = Vec::new();
4339 let mut right_anchors = Vec::new();
4340 let mut offsets = Vec::new();
4341 let mut points = Vec::new();
4342 for offset in 0..=text.len() + 1 {
4343 let offset = MultiBufferOffset(offset);
4344 let clipped_left = snapshot.clip_offset(offset, Bias::Left);
4345 let clipped_right = snapshot.clip_offset(offset, Bias::Right);
4346 assert_eq!(
4347 clipped_left.0,
4348 text.clip_offset(offset.0, Bias::Left),
4349 "clip_offset({offset:?}, Left)"
4350 );
4351 assert_eq!(
4352 clipped_right.0,
4353 text.clip_offset(offset.0, Bias::Right),
4354 "clip_offset({offset:?}, Right)"
4355 );
4356 assert_eq!(
4357 snapshot.offset_to_point(clipped_left),
4358 text.offset_to_point(clipped_left.0),
4359 "offset_to_point({})",
4360 clipped_left.0
4361 );
4362 assert_eq!(
4363 snapshot.offset_to_point(clipped_right),
4364 text.offset_to_point(clipped_right.0),
4365 "offset_to_point({})",
4366 clipped_right.0
4367 );
4368 let anchor_after = snapshot.anchor_after(clipped_left);
4369 assert_eq!(
4370 anchor_after.to_offset(snapshot),
4371 clipped_left,
4372 "anchor_after({}).to_offset {anchor_after:?}",
4373 clipped_left.0
4374 );
4375 let anchor_before = snapshot.anchor_before(clipped_left);
4376 assert_eq!(
4377 anchor_before.to_offset(snapshot),
4378 clipped_left,
4379 "anchor_before({}).to_offset",
4380 clipped_left.0
4381 );
4382 left_anchors.push(anchor_before);
4383 right_anchors.push(anchor_after);
4384 offsets.push(clipped_left);
4385 points.push(text.offset_to_point(clipped_left.0));
4386 }
4387
4388 for row in 0..text.max_point().row {
4389 for column in 0..text.line_len(row) + 1 {
4390 let point = Point { row, column };
4391 let clipped_left = snapshot.clip_point(point, Bias::Left);
4392 let clipped_right = snapshot.clip_point(point, Bias::Right);
4393 assert_eq!(
4394 clipped_left,
4395 text.clip_point(point, Bias::Left),
4396 "clip_point({point:?}, Left)"
4397 );
4398 assert_eq!(
4399 clipped_right,
4400 text.clip_point(point, Bias::Right),
4401 "clip_point({point:?}, Right)"
4402 );
4403 assert_eq!(
4404 snapshot.point_to_offset(clipped_left).0,
4405 text.point_to_offset(clipped_left),
4406 "point_to_offset({clipped_left:?})"
4407 );
4408 assert_eq!(
4409 snapshot.point_to_offset(clipped_right).0,
4410 text.point_to_offset(clipped_right),
4411 "point_to_offset({clipped_right:?})"
4412 );
4413 }
4414 }
4415
4416 assert_eq!(
4417 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&left_anchors),
4418 offsets,
4419 "left_anchors <-> offsets"
4420 );
4421 assert_eq!(
4422 snapshot.summaries_for_anchors::<Point, _>(&left_anchors),
4423 points,
4424 "left_anchors <-> points"
4425 );
4426 assert_eq!(
4427 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&right_anchors),
4428 offsets,
4429 "right_anchors <-> offsets"
4430 );
4431 assert_eq!(
4432 snapshot.summaries_for_anchors::<Point, _>(&right_anchors),
4433 points,
4434 "right_anchors <-> points"
4435 );
4436
4437 for (anchors, bias) in [(&left_anchors, Bias::Left), (&right_anchors, Bias::Right)] {
4438 for (ix, (offset, anchor)) in offsets.iter().zip(anchors).enumerate() {
4439 if ix > 0 && *offset == MultiBufferOffset(252) && offset > &offsets[ix - 1] {
4440 let prev_anchor = left_anchors[ix - 1];
4441 assert!(
4442 anchor.cmp(&prev_anchor, snapshot).is_gt(),
4443 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_gt()",
4444 offsets[ix],
4445 offsets[ix - 1],
4446 );
4447 assert!(
4448 prev_anchor.cmp(anchor, snapshot).is_lt(),
4449 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_lt()",
4450 offsets[ix - 1],
4451 offsets[ix],
4452 );
4453 }
4454 }
4455 }
4456
4457 if let Some((buffer, offset)) = snapshot.point_to_buffer_offset(snapshot.max_point()) {
4458 assert!(offset.0 <= buffer.len());
4459 }
4460 if let Some((buffer, point)) = snapshot.point_to_buffer_point(snapshot.max_point()) {
4461 assert!(point <= buffer.max_point());
4462 }
4463}
4464
4465fn assert_line_indents(snapshot: &MultiBufferSnapshot) {
4466 let max_row = snapshot.max_point().row;
4467 let buffer_id = snapshot.excerpts().next().unwrap().1.buffer_id;
4468 let text = text::Buffer::new(ReplicaId::LOCAL, buffer_id, snapshot.text());
4469 let mut line_indents = text
4470 .line_indents_in_row_range(0..max_row + 1)
4471 .collect::<Vec<_>>();
4472 for start_row in 0..snapshot.max_point().row {
4473 pretty_assertions::assert_eq!(
4474 snapshot
4475 .line_indents(MultiBufferRow(start_row), |_| true)
4476 .map(|(row, indent, _)| (row.0, indent))
4477 .collect::<Vec<_>>(),
4478 &line_indents[(start_row as usize)..],
4479 "line_indents({start_row})"
4480 );
4481 }
4482
4483 line_indents.reverse();
4484 pretty_assertions::assert_eq!(
4485 snapshot
4486 .reversed_line_indents(MultiBufferRow(max_row), |_| true)
4487 .map(|(row, indent, _)| (row.0, indent))
4488 .collect::<Vec<_>>(),
4489 &line_indents[..],
4490 "reversed_line_indents({max_row})"
4491 );
4492}
4493
4494#[gpui::test]
4495fn test_new_empty_buffer_uses_untitled_title(cx: &mut App) {
4496 let buffer = cx.new(|cx| Buffer::local("", cx));
4497 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4498
4499 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4500}
4501
4502#[gpui::test]
4503fn test_new_empty_buffer_uses_untitled_title_when_only_contains_whitespace(cx: &mut App) {
4504 let buffer = cx.new(|cx| Buffer::local("\n ", cx));
4505 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4506
4507 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4508}
4509
4510#[gpui::test]
4511fn test_new_empty_buffer_takes_first_line_for_title(cx: &mut App) {
4512 let buffer = cx.new(|cx| Buffer::local("Hello World\nSecond line", cx));
4513 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4514
4515 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4516}
4517
4518#[gpui::test]
4519fn test_new_empty_buffer_takes_trimmed_first_line_for_title(cx: &mut App) {
4520 let buffer = cx.new(|cx| Buffer::local("\nHello, World ", cx));
4521 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4522
4523 assert_eq!(multibuffer.read(cx).title(cx), "Hello, World");
4524}
4525
4526#[gpui::test]
4527fn test_new_empty_buffer_uses_truncated_first_line_for_title(cx: &mut App) {
4528 let title = "aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeee";
4529 let title_after = "aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd";
4530 let buffer = cx.new(|cx| Buffer::local(title, cx));
4531 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4532
4533 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4534}
4535
4536#[gpui::test]
4537fn test_new_empty_buffer_uses_truncated_first_line_for_title_after_merging_adjacent_spaces(
4538 cx: &mut App,
4539) {
4540 let title = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddddeeeeeeeeee";
4541 let title_after = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddd";
4542 let buffer = cx.new(|cx| Buffer::local(title, cx));
4543 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4544
4545 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4546}
4547
4548#[gpui::test]
4549fn test_new_empty_buffers_title_can_be_set(cx: &mut App) {
4550 let buffer = cx.new(|cx| Buffer::local("Hello World", cx));
4551 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4552 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4553
4554 multibuffer.update(cx, |multibuffer, cx| {
4555 multibuffer.set_title("Hey".into(), cx)
4556 });
4557 assert_eq!(multibuffer.read(cx).title(cx), "Hey");
4558}
4559
4560#[gpui::test(iterations = 100)]
4561fn test_random_chunk_bitmaps(cx: &mut App, mut rng: StdRng) {
4562 let multibuffer = if rng.random() {
4563 let len = rng.random_range(0..10000);
4564 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4565 let buffer = cx.new(|cx| Buffer::local(text, cx));
4566 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4567 } else {
4568 MultiBuffer::build_random(&mut rng, cx)
4569 };
4570
4571 let snapshot = multibuffer.read(cx).snapshot(cx);
4572
4573 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4574
4575 for chunk in chunks {
4576 let chunk_text = chunk.text;
4577 let chars_bitmap = chunk.chars;
4578 let tabs_bitmap = chunk.tabs;
4579
4580 if chunk_text.is_empty() {
4581 assert_eq!(
4582 chars_bitmap, 0,
4583 "Empty chunk should have empty chars bitmap"
4584 );
4585 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4586 continue;
4587 }
4588
4589 assert!(
4590 chunk_text.len() <= 128,
4591 "Chunk text length {} exceeds 128 bytes",
4592 chunk_text.len()
4593 );
4594
4595 // Verify chars bitmap
4596 let char_indices = chunk_text
4597 .char_indices()
4598 .map(|(i, _)| i)
4599 .collect::<Vec<_>>();
4600
4601 for byte_idx in 0..chunk_text.len() {
4602 let should_have_bit = char_indices.contains(&byte_idx);
4603 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4604
4605 if has_bit != should_have_bit {
4606 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4607 eprintln!("Char indices: {:?}", char_indices);
4608 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4609 }
4610
4611 assert_eq!(
4612 has_bit, should_have_bit,
4613 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4614 byte_idx, chunk_text, should_have_bit, has_bit
4615 );
4616 }
4617
4618 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4619 let is_tab = byte == b'\t';
4620 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4621
4622 if has_bit != is_tab {
4623 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4624 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4625 assert_eq!(
4626 has_bit, is_tab,
4627 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4628 byte_idx, chunk_text, byte as char, is_tab, has_bit
4629 );
4630 }
4631 }
4632 }
4633}
4634
4635#[gpui::test(iterations = 10)]
4636fn test_random_chunk_bitmaps_with_diffs(cx: &mut App, mut rng: StdRng) {
4637 let settings_store = SettingsStore::test(cx);
4638 cx.set_global(settings_store);
4639 use buffer_diff::BufferDiff;
4640 use util::RandomCharIter;
4641
4642 let multibuffer = if rng.random() {
4643 let len = rng.random_range(100..10000);
4644 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4645 let buffer = cx.new(|cx| Buffer::local(text, cx));
4646 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4647 } else {
4648 MultiBuffer::build_random(&mut rng, cx)
4649 };
4650
4651 let _diff_count = rng.random_range(1..5);
4652 let mut diffs = Vec::new();
4653
4654 multibuffer.update(cx, |multibuffer, cx| {
4655 for buffer_id in multibuffer.all_buffer_ids() {
4656 if rng.random_bool(0.7) {
4657 if let Some(buffer_handle) = multibuffer.buffer(buffer_id) {
4658 let buffer_text = buffer_handle.read(cx).text();
4659 let mut base_text = String::new();
4660
4661 for line in buffer_text.lines() {
4662 if rng.random_bool(0.3) {
4663 continue;
4664 } else if rng.random_bool(0.3) {
4665 let line_len = rng.random_range(0..50);
4666 let modified_line = RandomCharIter::new(&mut rng)
4667 .take(line_len)
4668 .collect::<String>();
4669 base_text.push_str(&modified_line);
4670 base_text.push('\n');
4671 } else {
4672 base_text.push_str(line);
4673 base_text.push('\n');
4674 }
4675 }
4676
4677 if rng.random_bool(0.5) {
4678 let extra_lines = rng.random_range(1..5);
4679 for _ in 0..extra_lines {
4680 let line_len = rng.random_range(0..50);
4681 let extra_line = RandomCharIter::new(&mut rng)
4682 .take(line_len)
4683 .collect::<String>();
4684 base_text.push_str(&extra_line);
4685 base_text.push('\n');
4686 }
4687 }
4688
4689 let diff = cx.new(|cx| {
4690 BufferDiff::new_with_base_text(
4691 &base_text,
4692 &buffer_handle.read(cx).text_snapshot(),
4693 cx,
4694 )
4695 });
4696 diffs.push(diff.clone());
4697 multibuffer.add_diff(diff, cx);
4698 }
4699 }
4700 }
4701 });
4702
4703 multibuffer.update(cx, |multibuffer, cx| {
4704 if rng.random_bool(0.5) {
4705 multibuffer.set_all_diff_hunks_expanded(cx);
4706 } else {
4707 let snapshot = multibuffer.snapshot(cx);
4708 let text = snapshot.text();
4709
4710 let mut ranges = Vec::new();
4711 for _ in 0..rng.random_range(1..5) {
4712 if snapshot.len().0 == 0 {
4713 break;
4714 }
4715
4716 let diff_size = rng.random_range(5..1000);
4717 let mut start = rng.random_range(0..snapshot.len().0);
4718
4719 while !text.is_char_boundary(start) {
4720 start = start.saturating_sub(1);
4721 }
4722
4723 let mut end = rng.random_range(start..snapshot.len().0.min(start + diff_size));
4724
4725 while !text.is_char_boundary(end) {
4726 end = end.saturating_add(1);
4727 }
4728 let start_anchor = snapshot.anchor_after(MultiBufferOffset(start));
4729 let end_anchor = snapshot.anchor_before(MultiBufferOffset(end));
4730 ranges.push(start_anchor..end_anchor);
4731 }
4732 multibuffer.expand_diff_hunks(ranges, cx);
4733 }
4734 });
4735
4736 let snapshot = multibuffer.read(cx).snapshot(cx);
4737
4738 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4739
4740 for chunk in chunks {
4741 let chunk_text = chunk.text;
4742 let chars_bitmap = chunk.chars;
4743 let tabs_bitmap = chunk.tabs;
4744
4745 if chunk_text.is_empty() {
4746 assert_eq!(
4747 chars_bitmap, 0,
4748 "Empty chunk should have empty chars bitmap"
4749 );
4750 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4751 continue;
4752 }
4753
4754 assert!(
4755 chunk_text.len() <= 128,
4756 "Chunk text length {} exceeds 128 bytes",
4757 chunk_text.len()
4758 );
4759
4760 let char_indices = chunk_text
4761 .char_indices()
4762 .map(|(i, _)| i)
4763 .collect::<Vec<_>>();
4764
4765 for byte_idx in 0..chunk_text.len() {
4766 let should_have_bit = char_indices.contains(&byte_idx);
4767 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4768
4769 if has_bit != should_have_bit {
4770 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4771 eprintln!("Char indices: {:?}", char_indices);
4772 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4773 }
4774
4775 assert_eq!(
4776 has_bit, should_have_bit,
4777 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4778 byte_idx, chunk_text, should_have_bit, has_bit
4779 );
4780 }
4781
4782 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4783 let is_tab = byte == b'\t';
4784 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4785
4786 if has_bit != is_tab {
4787 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4788 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4789 assert_eq!(
4790 has_bit, is_tab,
4791 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4792 byte_idx, chunk_text, byte as char, is_tab, has_bit
4793 );
4794 }
4795 }
4796 }
4797}
4798
4799fn collect_word_diffs(
4800 base_text: &str,
4801 modified_text: &str,
4802 cx: &mut TestAppContext,
4803) -> Vec<String> {
4804 let buffer = cx.new(|cx| Buffer::local(modified_text, cx));
4805 let diff = cx
4806 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4807 cx.run_until_parked();
4808
4809 let multibuffer = cx.new(|cx| {
4810 let mut multibuffer = MultiBuffer::singleton(buffer.clone(), cx);
4811 multibuffer.add_diff(diff.clone(), cx);
4812 multibuffer
4813 });
4814
4815 multibuffer.update(cx, |multibuffer, cx| {
4816 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
4817 });
4818
4819 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4820 let text = snapshot.text();
4821
4822 snapshot
4823 .diff_hunks()
4824 .flat_map(|hunk| hunk.word_diffs)
4825 .map(|range| text[range.start.0..range.end.0].to_string())
4826 .collect()
4827}
4828
4829#[gpui::test]
4830async fn test_word_diff_simple_replacement(cx: &mut TestAppContext) {
4831 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4832 cx.set_global(settings_store);
4833
4834 let base_text = "hello world foo bar\n";
4835 let modified_text = "hello WORLD foo BAR\n";
4836
4837 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4838
4839 assert_eq!(word_diffs, vec!["world", "bar", "WORLD", "BAR"]);
4840}
4841
4842#[gpui::test]
4843async fn test_word_diff_white_space(cx: &mut TestAppContext) {
4844 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4845 cx.set_global(settings_store);
4846
4847 let base_text = "hello world foo bar\n";
4848 let modified_text = " hello world foo bar\n";
4849
4850 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4851
4852 assert_eq!(word_diffs, vec![" "]);
4853}
4854
4855#[gpui::test]
4856async fn test_word_diff_consecutive_modified_lines(cx: &mut TestAppContext) {
4857 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4858 cx.set_global(settings_store);
4859
4860 let base_text = "aaa bbb\nccc ddd\n";
4861 let modified_text = "aaa BBB\nccc DDD\n";
4862
4863 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4864
4865 assert_eq!(
4866 word_diffs,
4867 vec!["bbb", "ddd", "BBB", "DDD"],
4868 "consecutive modified lines should produce word diffs when line counts match"
4869 );
4870}
4871
4872#[gpui::test]
4873async fn test_word_diff_modified_lines_with_deletion_between(cx: &mut TestAppContext) {
4874 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4875 cx.set_global(settings_store);
4876
4877 let base_text = "aaa bbb\ndeleted line\nccc ddd\n";
4878 let modified_text = "aaa BBB\nccc DDD\n";
4879
4880 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4881
4882 assert_eq!(
4883 word_diffs,
4884 Vec::<String>::new(),
4885 "modified lines with a deleted line between should not produce word diffs"
4886 );
4887}
4888
4889#[gpui::test]
4890async fn test_word_diff_disabled(cx: &mut TestAppContext) {
4891 let settings_store = cx.update(|cx| {
4892 let mut settings_store = SettingsStore::test(cx);
4893 settings_store.update_user_settings(cx, |settings| {
4894 settings.project.all_languages.defaults.word_diff_enabled = Some(false);
4895 });
4896 settings_store
4897 });
4898 cx.set_global(settings_store);
4899
4900 let base_text = "hello world\n";
4901 let modified_text = "hello WORLD\n";
4902
4903 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4904
4905 assert_eq!(
4906 word_diffs,
4907 Vec::<String>::new(),
4908 "word diffs should be empty when disabled"
4909 );
4910}
4911
4912/// Tests `excerpt_containing` and `excerpts_for_range` (functions mapping multi-buffer text-coordinates to excerpts)
4913#[gpui::test]
4914fn test_excerpts_containment_functions(cx: &mut App) {
4915 // Multibuffer content for these tests:
4916 // 0123
4917 // 0: aa0
4918 // 1: aa1
4919 // -----
4920 // 2: bb0
4921 // 3: bb1
4922 // -----MultiBufferOffset(0)..
4923 // 4: cc0
4924
4925 let buffer_1 = cx.new(|cx| Buffer::local("aa0\naa1", cx));
4926 let buffer_2 = cx.new(|cx| Buffer::local("bb0\nbb1", cx));
4927 let buffer_3 = cx.new(|cx| Buffer::local("cc0", cx));
4928
4929 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
4930
4931 let (excerpt_1_info, excerpt_2_info, excerpt_3_info) =
4932 multibuffer.update(cx, |multibuffer, cx| {
4933 multibuffer.set_excerpts_for_path(
4934 PathKey::sorted(0),
4935 buffer_1.clone(),
4936 [Point::new(0, 0)..Point::new(1, 3)],
4937 0,
4938 cx,
4939 );
4940
4941 multibuffer.set_excerpts_for_path(
4942 PathKey::sorted(1),
4943 buffer_2.clone(),
4944 [Point::new(0, 0)..Point::new(1, 3)],
4945 0,
4946 cx,
4947 );
4948
4949 multibuffer.set_excerpts_for_path(
4950 PathKey::sorted(2),
4951 buffer_3.clone(),
4952 [Point::new(0, 0)..Point::new(0, 3)],
4953 0,
4954 cx,
4955 );
4956
4957 let snapshot = multibuffer.snapshot(cx);
4958 let mut infos = snapshot.excerpts().map(|(_, info)| info);
4959 (
4960 infos.next().unwrap(),
4961 infos.next().unwrap(),
4962 infos.next().unwrap(),
4963 )
4964 });
4965
4966 let snapshot = multibuffer.read(cx).snapshot(cx);
4967
4968 assert_eq!(snapshot.text(), "aa0\naa1\nbb0\nbb1\ncc0");
4969
4970 //// Test `excerpts_for_range`
4971
4972 let p00 = snapshot.point_to_offset(Point::new(0, 0));
4973 let p10 = snapshot.point_to_offset(Point::new(1, 0));
4974 let p20 = snapshot.point_to_offset(Point::new(2, 0));
4975 let p23 = snapshot.point_to_offset(Point::new(2, 3));
4976 let p13 = snapshot.point_to_offset(Point::new(1, 3));
4977 let p40 = snapshot.point_to_offset(Point::new(4, 0));
4978 let p43 = snapshot.point_to_offset(Point::new(4, 3));
4979
4980 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p00).collect();
4981 assert_eq!(excerpts.len(), 1);
4982 assert_eq!(excerpts[0].info(), excerpt_1_info);
4983
4984 // Cursor at very end of excerpt 3
4985 let excerpts: Vec<_> = snapshot.excerpts_for_range(p43..p43).collect();
4986 assert_eq!(excerpts.len(), 1);
4987 assert_eq!(excerpts[0].info(), excerpt_3_info);
4988
4989 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p23).collect();
4990 assert_eq!(excerpts.len(), 2);
4991 assert_eq!(excerpts[0].info(), excerpt_1_info);
4992 assert_eq!(excerpts[1].info(), excerpt_2_info);
4993
4994 // This range represent an selection with end-point just inside excerpt_2
4995 // Today we only expand the first excerpt, but another interpretation that
4996 // we could consider is expanding both here
4997 let excerpts: Vec<_> = snapshot.excerpts_for_range(p10..p20).collect();
4998 assert_eq!(excerpts.len(), 1);
4999 assert_eq!(excerpts[0].info(), excerpt_1_info);
5000
5001 //// Test that `excerpts_for_range` and `excerpt_containing` agree for all single offsets (cursor positions)
5002 for offset in 0..=snapshot.len().0 {
5003 let offset = MultiBufferOffset(offset);
5004 let excerpts_for_range: Vec<_> = snapshot.excerpts_for_range(offset..offset).collect();
5005 assert_eq!(
5006 excerpts_for_range.len(),
5007 1,
5008 "Expected exactly one excerpt for offset {offset}",
5009 );
5010
5011 let excerpt_containing = snapshot.excerpt_containing(offset..offset);
5012 assert!(
5013 excerpt_containing.is_some(),
5014 "Expected excerpt_containing to find excerpt for offset {offset}",
5015 );
5016
5017 assert_eq!(
5018 excerpts_for_range[0].info(),
5019 excerpt_containing.unwrap().excerpt.info(),
5020 "excerpts_for_range and excerpt_containing should agree for offset {offset}",
5021 );
5022 }
5023
5024 //// Test `excerpt_containing` behavior with ranges:
5025
5026 // Ranges intersecting a single-excerpt
5027 let containing = snapshot.excerpt_containing(p00..p13);
5028 assert!(containing.is_some());
5029 assert_eq!(containing.unwrap().excerpt.info(), excerpt_1_info);
5030
5031 // Ranges intersecting multiple excerpts (should return None)
5032 let containing = snapshot.excerpt_containing(p20..p40);
5033 assert!(
5034 containing.is_none(),
5035 "excerpt_containing should return None for ranges spanning multiple excerpts"
5036 );
5037}
5038
5039#[gpui::test]
5040fn test_range_to_buffer_ranges(cx: &mut App) {
5041 let buffer_1 = cx.new(|cx| Buffer::local("aaa\nbbb", cx));
5042 let buffer_2 = cx.new(|cx| Buffer::local("ccc", cx));
5043
5044 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5045 multibuffer.update(cx, |multibuffer, cx| {
5046 multibuffer.set_excerpts_for_path(
5047 PathKey::sorted(0),
5048 buffer_1.clone(),
5049 [Point::new(0, 0)..Point::new(1, 3)],
5050 0,
5051 cx,
5052 );
5053
5054 multibuffer.set_excerpts_for_path(
5055 PathKey::sorted(1),
5056 buffer_2.clone(),
5057 [Point::new(0, 0)..Point::new(0, 3)],
5058 0,
5059 cx,
5060 );
5061 });
5062
5063 let snapshot = multibuffer.read(cx).snapshot(cx);
5064 assert_eq!(snapshot.text(), "aaa\nbbb\nccc");
5065
5066 let excerpt_2_start = Point::new(2, 0);
5067
5068 let ranges_half_open = snapshot.range_to_buffer_ranges(Point::zero()..excerpt_2_start);
5069 assert_eq!(
5070 ranges_half_open.len(),
5071 1,
5072 "Half-open range ending at excerpt start should EXCLUDE that excerpt"
5073 );
5074 assert_eq!(ranges_half_open[0].1, BufferOffset(0)..BufferOffset(7));
5075 assert_eq!(
5076 ranges_half_open[0].0.remote_id(),
5077 buffer_1.read(cx).remote_id()
5078 );
5079
5080 let buffer_empty = cx.new(|cx| Buffer::local("", cx));
5081 let multibuffer_trailing_empty = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5082 let (te_excerpt_1_info, te_excerpt_2_info) =
5083 multibuffer_trailing_empty.update(cx, |multibuffer, cx| {
5084 multibuffer.set_excerpts_for_path(
5085 PathKey::sorted(0),
5086 buffer_1.clone(),
5087 [Point::new(0, 0)..Point::new(1, 3)],
5088 0,
5089 cx,
5090 );
5091
5092 multibuffer.set_excerpts_for_path(
5093 PathKey::sorted(1),
5094 buffer_empty.clone(),
5095 [Point::new(0, 0)..Point::new(0, 0)],
5096 0,
5097 cx,
5098 );
5099
5100 let snapshot = multibuffer.snapshot(cx);
5101 let mut infos = snapshot.excerpts().map(|(_, info)| info);
5102 (infos.next().unwrap(), infos.next().unwrap())
5103 });
5104
5105 let snapshot_trailing = multibuffer_trailing_empty.read(cx).snapshot(cx);
5106 assert_eq!(snapshot_trailing.text(), "aaa\nbbb\n");
5107
5108 let max_point = snapshot_trailing.max_point();
5109
5110 let ranges_half_open_max =
5111 snapshot_trailing.range_to_buffer_ranges_with_context(Point::zero()..max_point);
5112 assert_eq!(
5113 ranges_half_open_max.len(),
5114 2,
5115 "Should include trailing empty excerpts"
5116 );
5117 assert_eq!(ranges_half_open_max[0].2, te_excerpt_1_info.range);
5118}
5119
5120#[gpui::test]
5121fn test_cannot_seek_backward_after_excerpt_replacement(cx: &mut TestAppContext) {
5122 let buffer_b_text: String = (0..50).map(|i| format!("line_b {i}\n")).collect();
5123 let buffer_b = cx.new(|cx| Buffer::local(buffer_b_text, cx));
5124
5125 let buffer_c_text: String = (0..10).map(|i| format!("line_c {i}\n")).collect();
5126 let buffer_c = cx.new(|cx| Buffer::local(buffer_c_text, cx));
5127
5128 let buffer_d_text: String = (0..10).map(|i| format!("line_d {i}\n")).collect();
5129 let buffer_d = cx.new(|cx| Buffer::local(buffer_d_text, cx));
5130
5131 let path_b = PathKey::with_sort_prefix(0, rel_path("bbb.rs").into_arc());
5132 let path_c = PathKey::with_sort_prefix(0, rel_path("ddd.rs").into_arc());
5133 let path_d = PathKey::with_sort_prefix(0, rel_path("ccc.rs").into_arc());
5134
5135 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5136
5137 multibuffer.update(cx, |multibuffer, cx| {
5138 multibuffer.set_excerpts_for_path(
5139 path_b.clone(),
5140 buffer_b.clone(),
5141 vec![
5142 Point::row_range(0..3),
5143 Point::row_range(15..18),
5144 Point::row_range(30..33),
5145 ],
5146 0,
5147 cx,
5148 );
5149 });
5150
5151 multibuffer.update(cx, |multibuffer, cx| {
5152 multibuffer.set_excerpts_for_path(
5153 path_c.clone(),
5154 buffer_c.clone(),
5155 vec![Point::row_range(0..3)],
5156 0,
5157 cx,
5158 );
5159 });
5160
5161 let (anchor_in_e_b2, anchor_in_e_b3) = multibuffer.read_with(cx, |multibuffer, cx| {
5162 let snapshot = multibuffer.snapshot(cx);
5163 let excerpt_infos: Vec<ExcerptInfo> = snapshot.excerpts().map(|(_, info)| info).collect();
5164 assert_eq!(excerpt_infos.len(), 4, "expected 4 excerpts (3×B + 1×C)");
5165
5166 let e_b2_info = excerpt_infos[1].clone();
5167 let e_b3_info = excerpt_infos[2].clone();
5168
5169 let anchor_b2 = Anchor::in_buffer(e_b2_info.path_key_index, e_b2_info.range.start);
5170 let anchor_b3 = Anchor::in_buffer(e_b3_info.path_key_index, e_b3_info.range.start);
5171 (anchor_b2, anchor_b3)
5172 });
5173
5174 multibuffer.update(cx, |multibuffer, cx| {
5175 multibuffer.set_excerpts_for_path(
5176 path_b.clone(),
5177 buffer_b.clone(),
5178 vec![Point::row_range(0..3), Point::row_range(28..36)],
5179 0,
5180 cx,
5181 );
5182 });
5183
5184 multibuffer.update(cx, |multibuffer, cx| {
5185 multibuffer.set_excerpts_for_path(
5186 path_d.clone(),
5187 buffer_d.clone(),
5188 vec![Point::row_range(0..3)],
5189 0,
5190 cx,
5191 );
5192 });
5193
5194 multibuffer.read_with(cx, |multibuffer, cx| {
5195 let snapshot = multibuffer.snapshot(cx);
5196 snapshot.summaries_for_anchors::<Point, _>(&[anchor_in_e_b2, anchor_in_e_b3]);
5197 });
5198}