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(Clone, 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 let mut new_ranges = self
2308 .excerpts
2309 .iter()
2310 .map(|excerpt| {
2311 (
2312 excerpt.clone(),
2313 excerpt.range.to_point(&excerpt.buffer.read(cx).snapshot()),
2314 )
2315 })
2316 .collect::<Vec<_>>();
2317
2318 for (excerpt, point_range) in &mut new_ranges {
2319 if excerpts.contains(&excerpt.info(cx)) {
2320 let snapshot = excerpt.buffer.read(cx).snapshot();
2321 point_range.start = Point::new(point_range.start.row.saturating_sub(line_count), 0);
2322 point_range.end = snapshot
2323 .clip_point(Point::new(point_range.end.row + line_count, 0), Bias::Left);
2324 point_range.end.column = snapshot.line_len(point_range.end.row);
2325 }
2326 }
2327
2328 for ((path_key, path_key_index, buffer), chunk) in
2329 &new_ranges.iter().chunk_by(|(excerpt, _)| {
2330 (
2331 excerpt.path_key.clone(),
2332 excerpt.path_key_index,
2333 excerpt.buffer.clone(),
2334 )
2335 })
2336 {
2337 let buffer_snapshot = buffer.read(cx).snapshot();
2338 self.set_excerpts(
2339 path_key,
2340 path_key_index,
2341 buffer,
2342 &buffer_snapshot,
2343 chunk
2344 .map(|(_, range)| ExcerptRange::new(range.clone()))
2345 .collect::<Vec<_>>(),
2346 );
2347 }
2348 }
2349
2350 fn set_excerpts(
2351 &mut self,
2352 path_key: PathKey,
2353 path_key_index: PathKeyIndex,
2354 buffer: Entity<Buffer>,
2355 buffer_snapshot: &BufferSnapshot,
2356 ranges: Vec<ExcerptRange<Point>>,
2357 ) {
2358 self.excerpts.retain(|excerpt| {
2359 excerpt.path_key != path_key && excerpt.buffer.entity_id() != buffer.entity_id()
2360 });
2361
2362 let ranges = MultiBuffer::merge_excerpt_ranges(&ranges);
2363
2364 let (Ok(ix) | Err(ix)) = self
2365 .excerpts
2366 .binary_search_by(|probe| probe.path_key.cmp(&path_key));
2367 self.excerpts.splice(
2368 ix..ix,
2369 ranges.into_iter().map(|range| ReferenceExcerpt {
2370 path_key: path_key.clone(),
2371 path_key_index,
2372 buffer: buffer.clone(),
2373 range: buffer_snapshot.anchor_before(range.context.start)
2374 ..buffer_snapshot.anchor_after(range.context.end),
2375 }),
2376 );
2377 }
2378
2379 fn expand_diff_hunks(&mut self, path_key: PathKey, range: Range<text::Anchor>, cx: &App) {
2380 let excerpt = self
2381 .excerpts
2382 .iter_mut()
2383 .find(|e| {
2384 e.path_key == path_key
2385 && e.range
2386 .start
2387 .cmp(&range.start, &e.buffer.read(cx).snapshot())
2388 .is_le()
2389 })
2390 .unwrap();
2391 let buffer = excerpt.buffer.read(cx).snapshot();
2392 let buffer_id = buffer.remote_id();
2393
2394 // Skip inverted excerpts - hunks are always expanded
2395 if self.inverted_diffs.contains_key(&buffer_id) {
2396 return;
2397 }
2398
2399 let Some(diff) = self.diffs.get(&buffer_id) else {
2400 return;
2401 };
2402 let excerpt_range = excerpt.range.to_offset(&buffer);
2403 let expanded_diff_hunks = self
2404 .expanded_diff_hunks_by_buffer
2405 .entry(buffer_id)
2406 .or_default();
2407 for hunk in diff
2408 .read(cx)
2409 .snapshot(cx)
2410 .hunks_intersecting_range(range, &buffer)
2411 {
2412 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2413 if hunk_range.start < excerpt_range.start || hunk_range.start > excerpt_range.end {
2414 continue;
2415 }
2416 if let Err(ix) = expanded_diff_hunks
2417 .binary_search_by(|anchor| anchor.cmp(&hunk.buffer_range.start, &buffer))
2418 {
2419 log::info!(
2420 "expanding diff hunk {:?}. excerpt range:{:?}",
2421 hunk_range,
2422 excerpt_range
2423 );
2424 expanded_diff_hunks.insert(ix, hunk.buffer_range.start);
2425 } else {
2426 log::trace!("hunk {hunk_range:?} already expanded in excerpt");
2427 }
2428 }
2429 }
2430
2431 fn expected_content(&self, cx: &App) -> (String, Vec<RowInfo>, HashSet<MultiBufferRow>) {
2432 let mut text = String::new();
2433 let mut regions = Vec::<ReferenceRegion>::new();
2434 let mut excerpt_boundary_rows = HashSet::default();
2435 for excerpt in &self.excerpts {
2436 excerpt_boundary_rows.insert(MultiBufferRow(text.matches('\n').count() as u32));
2437 let buffer = excerpt.buffer.read(cx);
2438 let buffer_id = buffer.remote_id();
2439 let buffer_range = excerpt.range.to_offset(buffer);
2440
2441 if let Some((diff, main_buffer)) = self.inverted_diffs.get(&buffer_id) {
2442 let diff_snapshot = diff.read(cx).snapshot(cx);
2443 let main_buffer_snapshot = main_buffer.read(cx).snapshot();
2444
2445 let mut offset = buffer_range.start;
2446 for hunk in diff_snapshot.hunks_intersecting_base_text_range(
2447 buffer_range.clone(),
2448 &main_buffer_snapshot.text,
2449 ) {
2450 let mut hunk_base_range = hunk.diff_base_byte_range.clone();
2451
2452 hunk_base_range.end = hunk_base_range.end.min(buffer_range.end);
2453 if hunk_base_range.start > buffer_range.end
2454 || hunk_base_range.start < buffer_range.start
2455 {
2456 continue;
2457 }
2458
2459 // Add the text before the hunk
2460 if hunk_base_range.start >= offset {
2461 let len = text.len();
2462 text.extend(buffer.text_for_range(offset..hunk_base_range.start));
2463 if text.len() > len {
2464 regions.push(ReferenceRegion {
2465 buffer_id: Some(buffer_id),
2466 range: len..text.len(),
2467 buffer_range: Some(
2468 (offset..hunk_base_range.start).to_point(&buffer),
2469 ),
2470 status: None,
2471 excerpt_info: Some(excerpt.info(cx)),
2472 });
2473 }
2474 }
2475
2476 // Add the "deleted" region (base text that's not in main)
2477 if !hunk_base_range.is_empty() {
2478 let len = text.len();
2479 text.extend(buffer.text_for_range(hunk_base_range.clone()));
2480 regions.push(ReferenceRegion {
2481 buffer_id: Some(buffer_id),
2482 range: len..text.len(),
2483 buffer_range: Some(hunk_base_range.to_point(&buffer)),
2484 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2485 excerpt_info: Some(excerpt.info(cx)),
2486 });
2487 }
2488
2489 offset = hunk_base_range.end;
2490 }
2491
2492 // Add remaining buffer text
2493 let len = text.len();
2494 text.extend(buffer.text_for_range(offset..buffer_range.end));
2495 text.push('\n');
2496 regions.push(ReferenceRegion {
2497 buffer_id: Some(buffer_id),
2498 range: len..text.len(),
2499 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2500 status: None,
2501 excerpt_info: Some(excerpt.info(cx)),
2502 });
2503 } else {
2504 let diff = self.diffs.get(&buffer_id).unwrap().read(cx).snapshot(cx);
2505 let base_buffer = diff.base_text();
2506
2507 let mut offset = buffer_range.start;
2508 let hunks = diff
2509 .hunks_intersecting_range(excerpt.range.clone(), buffer)
2510 .peekable();
2511
2512 for hunk in hunks {
2513 // Ignore hunks that are outside the excerpt range.
2514 let mut hunk_range = hunk.buffer_range.to_offset(buffer);
2515
2516 hunk_range.end = hunk_range.end.min(buffer_range.end);
2517 if hunk_range.start > buffer_range.end || hunk_range.start < buffer_range.start
2518 {
2519 log::trace!("skipping hunk outside excerpt range");
2520 continue;
2521 }
2522
2523 if !self
2524 .expanded_diff_hunks_by_buffer
2525 .get(&buffer_id)
2526 .cloned()
2527 .into_iter()
2528 .flatten()
2529 .any(|expanded_anchor| {
2530 expanded_anchor.to_offset(buffer).max(buffer_range.start)
2531 == hunk_range.start.max(buffer_range.start)
2532 })
2533 {
2534 log::trace!("skipping a hunk that's not marked as expanded");
2535 continue;
2536 }
2537
2538 if !hunk.buffer_range.start.is_valid(buffer) {
2539 log::trace!("skipping hunk with deleted start: {:?}", hunk.range);
2540 continue;
2541 }
2542
2543 if hunk_range.start >= offset {
2544 // Add the buffer text before the hunk
2545 let len = text.len();
2546 text.extend(buffer.text_for_range(offset..hunk_range.start));
2547 if text.len() > len {
2548 regions.push(ReferenceRegion {
2549 buffer_id: Some(buffer_id),
2550 range: len..text.len(),
2551 buffer_range: Some((offset..hunk_range.start).to_point(&buffer)),
2552 status: None,
2553 excerpt_info: Some(excerpt.info(cx)),
2554 });
2555 }
2556
2557 // Add the deleted text for the hunk.
2558 if !hunk.diff_base_byte_range.is_empty() {
2559 let mut base_text = base_buffer
2560 .text_for_range(hunk.diff_base_byte_range.clone())
2561 .collect::<String>();
2562 if !base_text.ends_with('\n') {
2563 base_text.push('\n');
2564 }
2565 let len = text.len();
2566 text.push_str(&base_text);
2567 regions.push(ReferenceRegion {
2568 buffer_id: Some(base_buffer.remote_id()),
2569 range: len..text.len(),
2570 buffer_range: Some(
2571 hunk.diff_base_byte_range.to_point(&base_buffer),
2572 ),
2573 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2574 excerpt_info: Some(excerpt.info(cx)),
2575 });
2576 }
2577
2578 offset = hunk_range.start;
2579 }
2580
2581 // Add the inserted text for the hunk.
2582 if hunk_range.end > offset {
2583 let len = text.len();
2584 text.extend(buffer.text_for_range(offset..hunk_range.end));
2585 let range = len..text.len();
2586 let region = ReferenceRegion {
2587 buffer_id: Some(buffer_id),
2588 range,
2589 buffer_range: Some((offset..hunk_range.end).to_point(&buffer)),
2590 status: Some(DiffHunkStatus::added(hunk.secondary_status)),
2591 excerpt_info: Some(excerpt.info(cx)),
2592 };
2593 offset = hunk_range.end;
2594 regions.push(region);
2595 }
2596 }
2597
2598 // Add the buffer text for the rest of the excerpt.
2599 let len = text.len();
2600 text.extend(buffer.text_for_range(offset..buffer_range.end));
2601 text.push('\n');
2602 regions.push(ReferenceRegion {
2603 buffer_id: Some(buffer_id),
2604 range: len..text.len(),
2605 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2606 status: None,
2607 excerpt_info: Some(excerpt.info(cx)),
2608 });
2609 }
2610 }
2611
2612 // Remove final trailing newline.
2613 if self.excerpts.is_empty() {
2614 regions.push(ReferenceRegion {
2615 buffer_id: None,
2616 range: 0..1,
2617 buffer_range: Some(Point::new(0, 0)..Point::new(0, 1)),
2618 status: None,
2619 excerpt_info: None,
2620 });
2621 } else {
2622 text.pop();
2623 }
2624
2625 // Retrieve the row info using the region that contains
2626 // the start of each multi-buffer line.
2627 let mut ix = 0;
2628 let row_infos = text
2629 .split('\n')
2630 .map(|line| {
2631 let row_info = regions
2632 .iter()
2633 .position(|region| region.range.contains(&ix))
2634 .map_or(RowInfo::default(), |region_ix| {
2635 let region = regions[region_ix].clone();
2636 let buffer_row = region.buffer_range.as_ref().map(|buffer_range| {
2637 buffer_range.start.row
2638 + text[region.range.start..ix].matches('\n').count() as u32
2639 });
2640 let main_buffer = self
2641 .excerpts
2642 .iter()
2643 .find(|e| e.info(cx) == region.excerpt_info.clone().unwrap())
2644 .map(|e| e.buffer.clone());
2645 let is_excerpt_start = region_ix == 0
2646 || ®ions[region_ix - 1].excerpt_info != ®ion.excerpt_info
2647 || regions[region_ix - 1].range.is_empty();
2648 let mut is_excerpt_end = region_ix == regions.len() - 1
2649 || ®ions[region_ix + 1].excerpt_info != ®ion.excerpt_info;
2650 let is_start = !text[region.range.start..ix].contains('\n');
2651 let mut is_end = if region.range.end > text.len() {
2652 !text[ix..].contains('\n')
2653 } else {
2654 text[ix..region.range.end.min(text.len())]
2655 .matches('\n')
2656 .count()
2657 == 1
2658 };
2659 if region_ix < regions.len() - 1
2660 && !text[ix..].contains("\n")
2661 && (region.status == Some(DiffHunkStatus::added_none())
2662 || region.status.is_some_and(|s| s.is_deleted()))
2663 && regions[region_ix + 1].excerpt_info == region.excerpt_info
2664 && regions[region_ix + 1].range.start == text.len()
2665 {
2666 is_end = true;
2667 is_excerpt_end = true;
2668 }
2669 let multibuffer_row =
2670 MultiBufferRow(text[..ix].matches('\n').count() as u32);
2671 let mut expand_direction = None;
2672 if let Some(buffer) = &main_buffer {
2673 let buffer_row = buffer_row.unwrap();
2674 let needs_expand_up = is_excerpt_start && is_start && buffer_row > 0;
2675 let needs_expand_down = is_excerpt_end
2676 && is_end
2677 && buffer.read(cx).max_point().row > buffer_row;
2678 expand_direction = if needs_expand_up && needs_expand_down {
2679 Some(ExpandExcerptDirection::UpAndDown)
2680 } else if needs_expand_up {
2681 Some(ExpandExcerptDirection::Up)
2682 } else if needs_expand_down {
2683 Some(ExpandExcerptDirection::Down)
2684 } else {
2685 None
2686 };
2687 }
2688 RowInfo {
2689 buffer_id: region.buffer_id,
2690 diff_status: region.status,
2691 buffer_row,
2692 wrapped_buffer_row: None,
2693
2694 multibuffer_row: Some(multibuffer_row),
2695 expand_info: expand_direction.zip(region.excerpt_info.clone()).map(
2696 |(direction, excerpt_info)| ExpandInfo {
2697 direction,
2698 excerpt_range: excerpt_info.range,
2699 },
2700 ),
2701 }
2702 });
2703 ix += line.len() + 1;
2704 row_info
2705 })
2706 .collect();
2707
2708 (text, row_infos, excerpt_boundary_rows)
2709 }
2710
2711 fn diffs_updated(&mut self, cx: &App) {
2712 for excerpt in &mut self.excerpts {
2713 let buffer = excerpt.buffer.read(cx).snapshot();
2714 let buffer_id = buffer.remote_id();
2715
2716 // Skip inverted diff excerpts - hunks are always expanded
2717 if self.inverted_diffs.contains_key(&buffer_id) {
2718 continue;
2719 }
2720
2721 let excerpt_range = excerpt.range.to_offset(&buffer);
2722 let Some(diff) = self.diffs.get(&buffer_id) else {
2723 continue;
2724 };
2725 let diff = diff.read(cx).snapshot(cx);
2726 let mut hunks = diff.hunks_in_row_range(0..u32::MAX, &buffer).peekable();
2727 self.expanded_diff_hunks_by_buffer
2728 .entry(buffer_id)
2729 .or_default()
2730 .retain(|hunk_anchor| {
2731 if !hunk_anchor.is_valid(&buffer) {
2732 return false;
2733 }
2734 while let Some(hunk) = hunks.peek() {
2735 match hunk.buffer_range.start.cmp(hunk_anchor, &buffer) {
2736 cmp::Ordering::Less => {
2737 hunks.next();
2738 }
2739 cmp::Ordering::Equal => {
2740 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2741 return hunk_range.end >= excerpt_range.start
2742 && hunk_range.start <= excerpt_range.end;
2743 }
2744 cmp::Ordering::Greater => break,
2745 }
2746 }
2747 false
2748 });
2749 }
2750 }
2751
2752 fn add_diff(&mut self, diff: Entity<BufferDiff>, cx: &mut App) {
2753 let buffer_id = diff.read(cx).buffer_id;
2754 self.diffs.insert(buffer_id, diff);
2755 }
2756
2757 fn add_inverted_diff(
2758 &mut self,
2759 diff: Entity<BufferDiff>,
2760 main_buffer: Entity<language::Buffer>,
2761 cx: &App,
2762 ) {
2763 let base_text_buffer_id = diff.read(cx).base_text(cx).remote_id();
2764 self.inverted_diffs
2765 .insert(base_text_buffer_id, (diff, main_buffer));
2766 }
2767}
2768
2769#[gpui::test(iterations = 100)]
2770async fn test_random_set_ranges(cx: &mut TestAppContext, mut rng: StdRng) {
2771 let base_text = "a\n".repeat(100);
2772 let buf = cx.update(|cx| cx.new(|cx| Buffer::local(base_text, cx)));
2773 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2774
2775 let operations = env::var("OPERATIONS")
2776 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2777 .unwrap_or(10);
2778
2779 fn row_ranges(ranges: &Vec<Range<Point>>) -> Vec<Range<u32>> {
2780 ranges
2781 .iter()
2782 .map(|range| range.start.row..range.end.row)
2783 .collect()
2784 }
2785
2786 for _ in 0..operations {
2787 let snapshot = buf.update(cx, |buf, _| buf.snapshot());
2788 let num_ranges = rng.random_range(0..=10);
2789 let max_row = snapshot.max_point().row;
2790 let mut ranges = (0..num_ranges)
2791 .map(|_| {
2792 let start = rng.random_range(0..max_row);
2793 let end = rng.random_range(start + 1..max_row + 1);
2794 Point::row_range(start..end)
2795 })
2796 .collect::<Vec<_>>();
2797 ranges.sort_by_key(|range| range.start);
2798 log::info!("Setting ranges: {:?}", row_ranges(&ranges));
2799 let (created, _) = multibuffer.update(cx, |multibuffer, cx| {
2800 multibuffer.set_excerpts_for_path(
2801 PathKey::for_buffer(&buf, cx),
2802 buf.clone(),
2803 ranges.clone(),
2804 2,
2805 cx,
2806 )
2807 });
2808
2809 assert_eq!(created.len(), ranges.len());
2810
2811 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2812 let mut last_end = None;
2813 let mut seen_ranges = Vec::default();
2814
2815 for (buf, info) in snapshot.excerpts() {
2816 let start = info.range.start.to_point(buf);
2817 let end = info.range.end.to_point(buf);
2818 seen_ranges.push(start..end);
2819
2820 if let Some(last_end) = last_end.take() {
2821 assert!(
2822 start > last_end,
2823 "multibuffer has out-of-order ranges: {:?}; {:?} <= {:?}",
2824 row_ranges(&seen_ranges),
2825 start,
2826 last_end
2827 )
2828 }
2829
2830 ranges.retain(|range| range.start < start || range.end > end);
2831
2832 last_end = Some(end)
2833 }
2834
2835 assert!(
2836 ranges.is_empty(),
2837 "multibuffer {:?} did not include all ranges: {:?}",
2838 row_ranges(&seen_ranges),
2839 row_ranges(&ranges)
2840 );
2841 }
2842}
2843
2844#[gpui::test(iterations = 100)]
2845async fn test_random_multibuffer(cx: &mut TestAppContext, mut rng: StdRng) {
2846 let operations = env::var("OPERATIONS")
2847 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2848 .unwrap_or(10);
2849 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2850 let mut buffers: Vec<Entity<Buffer>> = Vec::new();
2851 let mut base_texts: HashMap<BufferId, String> = HashMap::default();
2852 let mut reference = ReferenceMultibuffer::default();
2853 let mut anchors = Vec::new();
2854 let mut old_versions = Vec::new();
2855 let mut needs_diff_calculation = false;
2856 let mut inverted_diff_main_buffers: HashMap<BufferId, Entity<BufferDiff>> = HashMap::default();
2857 for _ in 0..operations {
2858 match rng.random_range(0..100) {
2859 0..=14 if !buffers.is_empty() => {
2860 let buffer = buffers.choose(&mut rng).unwrap();
2861 buffer.update(cx, |buf, cx| {
2862 let edit_count = rng.random_range(1..5);
2863 buf.randomly_edit(&mut rng, edit_count, cx);
2864 log::info!("buffer text:\n{}", buf.text());
2865 needs_diff_calculation = true;
2866 });
2867 cx.update(|cx| reference.diffs_updated(cx));
2868 }
2869 15..=24 if !reference.excerpts.is_empty() => {
2870 multibuffer.update(cx, |multibuffer, cx| {
2871 let snapshot = multibuffer.snapshot(cx);
2872 let infos = snapshot
2873 .excerpts()
2874 .map(|(_, info)| info)
2875 .collect::<Vec<_>>();
2876 let mut excerpts = HashSet::default();
2877 for _ in 0..rng.random_range(0..infos.len()) {
2878 excerpts.extend(infos.choose(&mut rng).cloned());
2879 }
2880
2881 let line_count = rng.random_range(0..5);
2882
2883 let excerpt_ixs = excerpts
2884 .iter()
2885 .map(|info| {
2886 reference
2887 .excerpts
2888 .iter()
2889 .position(|e| e.info(cx) == *info)
2890 .unwrap()
2891 })
2892 .collect::<Vec<_>>();
2893 log::info!("Expanding excerpts {excerpt_ixs:?} by {line_count} lines");
2894 multibuffer.expand_excerpts(
2895 excerpts
2896 .iter()
2897 .map(|info| Anchor::in_buffer(info.path_key_index, info.range.end)),
2898 line_count,
2899 ExpandExcerptDirection::UpAndDown,
2900 cx,
2901 );
2902
2903 reference.expand_excerpts(&excerpts, line_count, cx);
2904 });
2905 }
2906 25..=34 if !reference.excerpts.is_empty() => {
2907 let multibuffer =
2908 multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2909 let offset = multibuffer.clip_offset(
2910 MultiBufferOffset(rng.random_range(0..=multibuffer.len().0)),
2911 Bias::Left,
2912 );
2913 let bias = if rng.random() {
2914 Bias::Left
2915 } else {
2916 Bias::Right
2917 };
2918 log::info!("Creating anchor at {} with bias {:?}", offset.0, bias);
2919 anchors.push(multibuffer.anchor_at(offset, bias));
2920 anchors.sort_by(|a, b| a.cmp(b, &multibuffer));
2921 }
2922 35..=45 if !reference.excerpts.is_empty() => {
2923 multibuffer.update(cx, |multibuffer, cx| {
2924 let snapshot = multibuffer.snapshot(cx);
2925 let excerpt_ix = rng.random_range(0..reference.excerpts.len());
2926 let excerpt = &reference.excerpts[excerpt_ix];
2927
2928 // Skip inverted excerpts - hunks can't be collapsed
2929 let buffer_id = excerpt.buffer.read(cx).remote_id();
2930 if reference.inverted_diffs.contains_key(&buffer_id) {
2931 return;
2932 }
2933
2934 let start = excerpt.range.start;
2935 let end = excerpt.range.end;
2936 let range = snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, start).unwrap()
2937 ..snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, end).unwrap();
2938
2939 log::info!(
2940 "expanding diff hunks in range {:?} (excerpt index {excerpt_ix:?}, buffer id {:?})",
2941 range.to_offset(&snapshot),
2942 buffer_id,
2943 );
2944 reference.expand_diff_hunks(excerpt.path_key.clone(), start..end, cx);
2945 multibuffer.expand_diff_hunks(vec![range], cx);
2946 });
2947 }
2948 46..=75 if needs_diff_calculation => {
2949 multibuffer.update(cx, |multibuffer, cx| {
2950 for buffer in multibuffer.all_buffers() {
2951 let snapshot = buffer.read(cx).snapshot();
2952 let buffer_id = snapshot.remote_id();
2953
2954 if let Some(diff) = multibuffer.diff_for(buffer_id) {
2955 diff.update(cx, |diff, cx| {
2956 log::info!("recalculating diff for buffer {:?}", buffer_id,);
2957 diff.recalculate_diff_sync(&snapshot.text, cx);
2958 });
2959 }
2960
2961 if let Some(inverted_diff) = inverted_diff_main_buffers.get(&buffer_id) {
2962 inverted_diff.update(cx, |diff, cx| {
2963 log::info!(
2964 "recalculating inverted diff for main buffer {:?}",
2965 buffer_id,
2966 );
2967 diff.recalculate_diff_sync(&snapshot.text, cx);
2968 });
2969 }
2970 }
2971 reference.diffs_updated(cx);
2972 needs_diff_calculation = false;
2973 });
2974 }
2975 _ => {
2976 // Decide if we're creating a new buffer or reusing an existing one
2977 let create_new_buffer = buffers.is_empty() || rng.random_bool(0.4);
2978
2979 let (excerpt_buffer, diff, inverted_main_buffer) = if create_new_buffer {
2980 let create_inverted = rng.random_bool(0.3);
2981
2982 if create_inverted {
2983 let mut main_buffer_text = util::RandomCharIter::new(&mut rng)
2984 .take(256)
2985 .collect::<String>();
2986 let main_buffer = cx.new(|cx| Buffer::local(main_buffer_text.clone(), cx));
2987 text::LineEnding::normalize(&mut main_buffer_text);
2988 let main_buffer_id =
2989 main_buffer.read_with(cx, |buffer, _| buffer.remote_id());
2990 base_texts.insert(main_buffer_id, main_buffer_text.clone());
2991 buffers.push(main_buffer.clone());
2992
2993 let diff = cx.new(|cx| {
2994 BufferDiff::new_with_base_text(
2995 &main_buffer_text,
2996 &main_buffer.read(cx).text_snapshot(),
2997 cx,
2998 )
2999 });
3000
3001 let base_text_buffer =
3002 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3003
3004 // Track for recalculation when main buffer is edited
3005 inverted_diff_main_buffers.insert(main_buffer_id, diff.clone());
3006
3007 (base_text_buffer, diff, Some(main_buffer))
3008 } else {
3009 let mut base_text = util::RandomCharIter::new(&mut rng)
3010 .take(256)
3011 .collect::<String>();
3012
3013 let buffer_handle = cx.new(|cx| Buffer::local(base_text.clone(), cx));
3014 text::LineEnding::normalize(&mut base_text);
3015 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3016 base_texts.insert(buffer_id, base_text.clone());
3017 buffers.push(buffer_handle.clone());
3018
3019 let diff = cx.new(|cx| {
3020 BufferDiff::new_with_base_text(
3021 &base_text,
3022 &buffer_handle.read(cx).text_snapshot(),
3023 cx,
3024 )
3025 });
3026
3027 (buffer_handle, diff, None)
3028 }
3029 } else {
3030 // Reuse an existing buffer
3031 let buffer_handle = buffers.choose(&mut rng).unwrap().clone();
3032 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3033
3034 if let Some(diff) = inverted_diff_main_buffers.get(&buffer_id) {
3035 let base_text_buffer =
3036 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3037 (base_text_buffer, diff.clone(), Some(buffer_handle))
3038 } else {
3039 // Get existing diff or create new one for regular buffer
3040 let diff = multibuffer
3041 .read_with(cx, |mb, _| mb.diff_for(buffer_id))
3042 .unwrap_or_else(|| {
3043 let base_text = base_texts.get(&buffer_id).unwrap();
3044 cx.new(|cx| {
3045 BufferDiff::new_with_base_text(
3046 base_text,
3047 &buffer_handle.read(cx).text_snapshot(),
3048 cx,
3049 )
3050 })
3051 });
3052 (buffer_handle, diff, None)
3053 }
3054 };
3055
3056 let excerpt_buffer_snapshot =
3057 excerpt_buffer.read_with(cx, |excerpt_buffer, _| excerpt_buffer.snapshot());
3058 let mut ranges = reference
3059 .excerpts
3060 .iter()
3061 .filter(|excerpt| excerpt.buffer == excerpt_buffer)
3062 .map(|excerpt| excerpt.range.to_point(&excerpt_buffer_snapshot))
3063 .collect::<Vec<_>>();
3064 mutate_excerpt_ranges(&mut rng, &mut ranges, &excerpt_buffer_snapshot, 1);
3065 let ranges = ranges
3066 .iter()
3067 .cloned()
3068 .map(ExcerptRange::new)
3069 .collect::<Vec<_>>();
3070 let path = cx.update(|cx| PathKey::for_buffer(&excerpt_buffer, cx));
3071
3072 let (_, path_key_index, _) = multibuffer.update(cx, |multibuffer, cx| {
3073 multibuffer.set_excerpt_ranges_for_path(
3074 path.clone(),
3075 excerpt_buffer.clone(),
3076 &excerpt_buffer_snapshot,
3077 ranges.clone(),
3078 cx,
3079 )
3080 });
3081
3082 reference.set_excerpts(
3083 path,
3084 path_key_index,
3085 excerpt_buffer.clone(),
3086 &excerpt_buffer_snapshot,
3087 ranges,
3088 );
3089
3090 let excerpt_buffer_id =
3091 excerpt_buffer.read_with(cx, |buffer, _| buffer.remote_id());
3092 multibuffer.update(cx, |multibuffer, cx| {
3093 if multibuffer.diff_for(excerpt_buffer_id).is_none() {
3094 if let Some(main_buffer) = inverted_main_buffer {
3095 reference.add_inverted_diff(diff.clone(), main_buffer.clone(), cx);
3096 multibuffer.add_inverted_diff(diff, main_buffer, cx);
3097 } else {
3098 reference.add_diff(diff.clone(), cx);
3099 multibuffer.add_diff(diff, cx);
3100 }
3101 }
3102 });
3103 }
3104 }
3105
3106 if rng.random_bool(0.3) {
3107 multibuffer.update(cx, |multibuffer, cx| {
3108 old_versions.push((multibuffer.snapshot(cx), multibuffer.subscribe()));
3109 })
3110 }
3111
3112 multibuffer.read_with(cx, |multibuffer, cx| {
3113 check_multibuffer(multibuffer, &reference, &anchors, cx, &mut rng);
3114 });
3115 }
3116 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
3117 for (old_snapshot, subscription) in old_versions {
3118 check_multibuffer_edits(&snapshot, &old_snapshot, subscription);
3119 }
3120}
3121
3122fn mutate_excerpt_ranges(
3123 rng: &mut StdRng,
3124 existing_ranges: &mut Vec<Range<Point>>,
3125 buffer: &BufferSnapshot,
3126 operations: u32,
3127) {
3128 let mut ranges_to_add = Vec::new();
3129
3130 for _ in 0..operations {
3131 // todo!() logging
3132 match rng.random_range(0..5) {
3133 0..=1 if !existing_ranges.is_empty() => {
3134 log::info!("Removing excerpt",);
3135 let index = rng.random_range(0..existing_ranges.len());
3136 existing_ranges.remove(index);
3137 }
3138 _ => {
3139 log::info!("Inserting excerpt",);
3140 let end_row = rng.random_range(0..=buffer.max_point().row);
3141 let start_row = rng.random_range(0..=end_row);
3142 ranges_to_add.push(Point::new(start_row, 0)..Point::new(end_row, 0));
3143 }
3144 }
3145 }
3146
3147 existing_ranges.extend(ranges_to_add);
3148 existing_ranges.sort_by(|l, r| l.start.cmp(&r.start));
3149}
3150
3151fn check_multibuffer(
3152 multibuffer: &MultiBuffer,
3153 reference: &ReferenceMultibuffer,
3154 anchors: &[Anchor],
3155 cx: &App,
3156 rng: &mut StdRng,
3157) {
3158 let snapshot = multibuffer.snapshot(cx);
3159 let actual_text = snapshot.text();
3160 let actual_boundary_rows = snapshot
3161 .excerpt_boundaries_in_range(MultiBufferOffset(0)..)
3162 .map(|b| b.row)
3163 .collect::<HashSet<_>>();
3164 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
3165
3166 let (expected_text, expected_row_infos, expected_boundary_rows) =
3167 reference.expected_content(cx);
3168
3169 let has_diff = actual_row_infos
3170 .iter()
3171 .any(|info| info.diff_status.is_some())
3172 || expected_row_infos
3173 .iter()
3174 .any(|info| info.diff_status.is_some());
3175 let actual_diff = format_diff(
3176 &actual_text,
3177 &actual_row_infos,
3178 &actual_boundary_rows,
3179 Some(has_diff),
3180 );
3181 let expected_diff = format_diff(
3182 &expected_text,
3183 &expected_row_infos,
3184 &expected_boundary_rows,
3185 Some(has_diff),
3186 );
3187
3188 log::info!("Multibuffer content:\n{}", actual_diff);
3189 dbg!(
3190 snapshot
3191 .excerpts()
3192 .map(|(buffer_snapshot, excerpt)| {
3193 (
3194 buffer_snapshot.remote_id(),
3195 excerpt.range.to_point(&buffer_snapshot),
3196 )
3197 })
3198 .collect::<Vec<_>>()
3199 );
3200 dbg!(
3201 reference
3202 .excerpts
3203 .iter()
3204 .cloned()
3205 .map(|excerpt| (
3206 excerpt.path_key,
3207 excerpt.range.to_point(&excerpt.buffer.read(cx).snapshot())
3208 ))
3209 .collect::<Vec<_>>()
3210 );
3211
3212 assert_eq!(
3213 actual_row_infos.len(),
3214 actual_text.split('\n').count(),
3215 "line count: {}",
3216 actual_text.split('\n').count()
3217 );
3218 pretty_assertions::assert_eq!(actual_diff, expected_diff);
3219 pretty_assertions::assert_eq!(actual_text, expected_text);
3220 pretty_assertions::assert_eq!(actual_row_infos, expected_row_infos);
3221
3222 for _ in 0..5 {
3223 let start_row = rng.random_range(0..=expected_row_infos.len());
3224 assert_eq!(
3225 snapshot
3226 .row_infos(MultiBufferRow(start_row as u32))
3227 .collect::<Vec<_>>(),
3228 &expected_row_infos[start_row..],
3229 "buffer_rows({})",
3230 start_row
3231 );
3232 }
3233 // dbg!(&expected_row_infos);
3234
3235 // dbg!(
3236 // snapshot
3237 // .excerpts()
3238 // .map(|(buffer_snapshot, excerpt)| {
3239 // (
3240 // buffer_snapshot.remote_id(),
3241 // excerpt.range.to_point(&buffer_snapshot),
3242 // )
3243 // })
3244 // .collect::<Vec<_>>()
3245 // );
3246 // dbg!(&expected_row_infos);
3247 // dbg!(
3248 // reference
3249 // .excerpts
3250 // .iter()
3251 // .map(|excerpt| { excerpt.range.to_point(&excerpt.buffer.read(cx).snapshot()) })
3252 // .collect::<Vec<_>>()
3253 // );
3254
3255 assert_eq!(
3256 snapshot.widest_line_number(),
3257 expected_row_infos
3258 .into_iter()
3259 .filter_map(|info| {
3260 // For inverted diffs, deleted rows are visible and should be counted.
3261 // Only filter out deleted rows that are NOT from inverted diffs.
3262 let is_inverted_diff = info
3263 .buffer_id
3264 .is_some_and(|id| reference.inverted_diffs.contains_key(&id));
3265 if info.diff_status.is_some_and(|status| status.is_deleted()) && !is_inverted_diff {
3266 None
3267 } else {
3268 info.buffer_row
3269 }
3270 })
3271 .max()
3272 .unwrap()
3273 + 1
3274 );
3275 // let reference_ranges = reference
3276 // .excerpts
3277 // .iter()
3278 // .map(|excerpt| {
3279 // (
3280 // excerpt.info(cx),
3281 // excerpt.range.to_offset(&excerpt.buffer.read(cx).snapshot()),
3282 // )
3283 // })
3284 // .collect::<Vec<_>>();
3285 for i in 0..snapshot.len().0 {
3286 // todo!() this seems not useful
3287 let excerpt = snapshot
3288 .excerpt_containing(MultiBufferOffset(i)..MultiBufferOffset(i))
3289 .unwrap();
3290 let reference_range = reference
3291 .excerpts
3292 .iter()
3293 .find(|reference_excerpt| reference_excerpt.info(cx) == excerpt.excerpt.info())
3294 .map(|excerpt| excerpt.range.to_offset(&excerpt.buffer.read(cx).snapshot()))
3295 .expect("corresponding excerpt should exist in reference multibuffer");
3296 assert_eq!(
3297 excerpt.buffer_range(&snapshot).start.0..excerpt.buffer_range(&snapshot).end.0,
3298 reference_range
3299 );
3300 }
3301
3302 assert_consistent_line_numbers(&snapshot);
3303 assert_position_translation(&snapshot);
3304
3305 for (row, line) in expected_text.split('\n').enumerate() {
3306 assert_eq!(
3307 snapshot.line_len(MultiBufferRow(row as u32)),
3308 line.len() as u32,
3309 "line_len({}).",
3310 row
3311 );
3312 }
3313
3314 let text_rope = Rope::from(expected_text.as_str());
3315 for _ in 0..10 {
3316 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3317 let start_ix = text_rope.clip_offset(rng.random_range(0..=end_ix), Bias::Left);
3318
3319 let text_for_range = snapshot
3320 .text_for_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3321 .collect::<String>();
3322 assert_eq!(
3323 text_for_range,
3324 &expected_text[start_ix..end_ix],
3325 "incorrect text for range {:?}",
3326 start_ix..end_ix
3327 );
3328
3329 let expected_summary =
3330 MBTextSummary::from(TextSummary::from(&expected_text[start_ix..end_ix]));
3331 assert_eq!(
3332 snapshot.text_summary_for_range::<MBTextSummary, _>(
3333 MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix)
3334 ),
3335 expected_summary,
3336 "incorrect summary for range {:?}",
3337 start_ix..end_ix
3338 );
3339 }
3340
3341 // Anchor resolution
3342 let summaries = snapshot.summaries_for_anchors::<MultiBufferOffset, _>(anchors);
3343 assert_eq!(anchors.len(), summaries.len());
3344 for (anchor, resolved_offset) in anchors.iter().zip(summaries) {
3345 assert!(resolved_offset <= snapshot.len());
3346 assert_eq!(
3347 snapshot.summary_for_anchor::<MultiBufferOffset>(anchor),
3348 resolved_offset,
3349 "anchor: {:?}",
3350 anchor
3351 );
3352 }
3353
3354 for _ in 0..10 {
3355 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3356 assert_eq!(
3357 snapshot
3358 .reversed_chars_at(MultiBufferOffset(end_ix))
3359 .collect::<String>(),
3360 expected_text[..end_ix].chars().rev().collect::<String>(),
3361 );
3362 }
3363
3364 for _ in 0..10 {
3365 let end_ix = rng.random_range(0..=text_rope.len());
3366 let end_ix = text_rope.floor_char_boundary(end_ix);
3367 let start_ix = rng.random_range(0..=end_ix);
3368 let start_ix = text_rope.floor_char_boundary(start_ix);
3369 assert_eq!(
3370 snapshot
3371 .bytes_in_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3372 .flatten()
3373 .copied()
3374 .collect::<Vec<_>>(),
3375 expected_text.as_bytes()[start_ix..end_ix].to_vec(),
3376 "bytes_in_range({:?})",
3377 start_ix..end_ix,
3378 );
3379 }
3380}
3381
3382fn check_multibuffer_edits(
3383 snapshot: &MultiBufferSnapshot,
3384 old_snapshot: &MultiBufferSnapshot,
3385 subscription: Subscription<MultiBufferOffset>,
3386) {
3387 let edits = subscription.consume().into_inner();
3388
3389 log::info!(
3390 "applying subscription edits to old text: {:?}: {:#?}",
3391 old_snapshot.text(),
3392 edits,
3393 );
3394
3395 let mut text = old_snapshot.text();
3396 for edit in edits {
3397 let new_text: String = snapshot
3398 .text_for_range(edit.new.start..edit.new.end)
3399 .collect();
3400 text.replace_range(
3401 (edit.new.start.0..edit.new.start.0 + (edit.old.end.0 - edit.old.start.0)).clone(),
3402 &new_text,
3403 );
3404 pretty_assertions::assert_eq!(
3405 &text[0..edit.new.end.0],
3406 snapshot
3407 .text_for_range(MultiBufferOffset(0)..edit.new.end)
3408 .collect::<String>()
3409 );
3410 }
3411 pretty_assertions::assert_eq!(text, snapshot.text());
3412}
3413
3414#[gpui::test]
3415fn test_history(cx: &mut App) {
3416 let test_settings = SettingsStore::test(cx);
3417 cx.set_global(test_settings);
3418
3419 let group_interval: Duration = Duration::from_millis(1);
3420 let buffer_1 = cx.new(|cx| {
3421 let mut buf = Buffer::local("1234", cx);
3422 buf.set_group_interval(group_interval);
3423 buf
3424 });
3425 let buffer_2 = cx.new(|cx| {
3426 let mut buf = Buffer::local("5678", cx);
3427 buf.set_group_interval(group_interval);
3428 buf
3429 });
3430 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
3431 multibuffer.update(cx, |this, _| {
3432 this.set_group_interval(group_interval);
3433 });
3434 multibuffer.update(cx, |multibuffer, cx| {
3435 multibuffer.set_excerpts_for_path(
3436 PathKey::sorted(0),
3437 buffer_1.clone(),
3438 [Point::zero()..buffer_1.read(cx).max_point()],
3439 0,
3440 cx,
3441 );
3442 multibuffer.set_excerpts_for_path(
3443 PathKey::sorted(1),
3444 buffer_2.clone(),
3445 [Point::zero()..buffer_2.read(cx).max_point()],
3446 0,
3447 cx,
3448 );
3449 });
3450
3451 let mut now = Instant::now();
3452
3453 multibuffer.update(cx, |multibuffer, cx| {
3454 let transaction_1 = multibuffer.start_transaction_at(now, cx).unwrap();
3455 multibuffer.edit(
3456 [
3457 (Point::new(0, 0)..Point::new(0, 0), "A"),
3458 (Point::new(1, 0)..Point::new(1, 0), "A"),
3459 ],
3460 None,
3461 cx,
3462 );
3463 multibuffer.edit(
3464 [
3465 (Point::new(0, 1)..Point::new(0, 1), "B"),
3466 (Point::new(1, 1)..Point::new(1, 1), "B"),
3467 ],
3468 None,
3469 cx,
3470 );
3471 multibuffer.end_transaction_at(now, cx);
3472 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3473
3474 // Verify edited ranges for transaction 1
3475 assert_eq!(
3476 multibuffer.edited_ranges_for_transaction(transaction_1, cx),
3477 &[
3478 MultiBufferOffset(0)..MultiBufferOffset(2),
3479 MultiBufferOffset(7)..MultiBufferOffset(9),
3480 ]
3481 );
3482
3483 // Edit buffer 1 through the multibuffer
3484 now += 2 * group_interval;
3485 multibuffer.start_transaction_at(now, cx);
3486 multibuffer.edit(
3487 [(MultiBufferOffset(2)..MultiBufferOffset(2), "C")],
3488 None,
3489 cx,
3490 );
3491 multibuffer.end_transaction_at(now, cx);
3492 assert_eq!(multibuffer.read(cx).text(), "ABC1234\nAB5678");
3493
3494 // Edit buffer 1 independently
3495 buffer_1.update(cx, |buffer_1, cx| {
3496 buffer_1.start_transaction_at(now);
3497 buffer_1.edit([(3..3, "D")], None, cx);
3498 buffer_1.end_transaction_at(now, cx);
3499
3500 now += 2 * group_interval;
3501 buffer_1.start_transaction_at(now);
3502 buffer_1.edit([(4..4, "E")], None, cx);
3503 buffer_1.end_transaction_at(now, cx);
3504 });
3505 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3506
3507 // An undo in the multibuffer undoes the multibuffer transaction
3508 // and also any individual buffer edits that have occurred since
3509 // that transaction.
3510 multibuffer.undo(cx);
3511 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3512
3513 multibuffer.undo(cx);
3514 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3515
3516 multibuffer.redo(cx);
3517 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3518
3519 multibuffer.redo(cx);
3520 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3521
3522 // Undo buffer 2 independently.
3523 buffer_2.update(cx, |buffer_2, cx| buffer_2.undo(cx));
3524 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\n5678");
3525
3526 // An undo in the multibuffer undoes the components of the
3527 // the last multibuffer transaction that are not already undone.
3528 multibuffer.undo(cx);
3529 assert_eq!(multibuffer.read(cx).text(), "AB1234\n5678");
3530
3531 multibuffer.undo(cx);
3532 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3533
3534 multibuffer.redo(cx);
3535 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3536
3537 buffer_1.update(cx, |buffer_1, cx| buffer_1.redo(cx));
3538 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3539
3540 // Redo stack gets cleared after an edit.
3541 now += 2 * group_interval;
3542 multibuffer.start_transaction_at(now, cx);
3543 multibuffer.edit(
3544 [(MultiBufferOffset(0)..MultiBufferOffset(0), "X")],
3545 None,
3546 cx,
3547 );
3548 multibuffer.end_transaction_at(now, cx);
3549 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3550 multibuffer.redo(cx);
3551 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3552 multibuffer.undo(cx);
3553 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3554 multibuffer.undo(cx);
3555 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3556
3557 // Transactions can be grouped manually.
3558 multibuffer.redo(cx);
3559 multibuffer.redo(cx);
3560 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3561 multibuffer.group_until_transaction(transaction_1, cx);
3562 multibuffer.undo(cx);
3563 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3564 multibuffer.redo(cx);
3565 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3566 });
3567}
3568
3569#[gpui::test]
3570async fn test_enclosing_indent(cx: &mut TestAppContext) {
3571 async fn enclosing_indent(
3572 text: &str,
3573 buffer_row: u32,
3574 cx: &mut TestAppContext,
3575 ) -> Option<(Range<u32>, LineIndent)> {
3576 let buffer = cx.update(|cx| MultiBuffer::build_simple(text, cx));
3577 let snapshot = cx.read(|cx| buffer.read(cx).snapshot(cx));
3578 let (range, indent) = snapshot
3579 .enclosing_indent(MultiBufferRow(buffer_row))
3580 .await?;
3581 Some((range.start.0..range.end.0, indent))
3582 }
3583
3584 assert_eq!(
3585 enclosing_indent(
3586 indoc!(
3587 "
3588 fn b() {
3589 if c {
3590 let d = 2;
3591 }
3592 }
3593 "
3594 ),
3595 1,
3596 cx,
3597 )
3598 .await,
3599 Some((
3600 1..2,
3601 LineIndent {
3602 tabs: 0,
3603 spaces: 4,
3604 line_blank: false,
3605 }
3606 ))
3607 );
3608
3609 assert_eq!(
3610 enclosing_indent(
3611 indoc!(
3612 "
3613 fn b() {
3614 if c {
3615 let d = 2;
3616 }
3617 }
3618 "
3619 ),
3620 2,
3621 cx,
3622 )
3623 .await,
3624 Some((
3625 1..2,
3626 LineIndent {
3627 tabs: 0,
3628 spaces: 4,
3629 line_blank: false,
3630 }
3631 ))
3632 );
3633
3634 assert_eq!(
3635 enclosing_indent(
3636 indoc!(
3637 "
3638 fn b() {
3639 if c {
3640 let d = 2;
3641
3642 let e = 5;
3643 }
3644 }
3645 "
3646 ),
3647 3,
3648 cx,
3649 )
3650 .await,
3651 Some((
3652 1..4,
3653 LineIndent {
3654 tabs: 0,
3655 spaces: 4,
3656 line_blank: false,
3657 }
3658 ))
3659 );
3660}
3661
3662#[gpui::test]
3663async fn test_summaries_for_anchors(cx: &mut TestAppContext) {
3664 let base_text_1 = indoc!(
3665 "
3666 bar
3667 "
3668 );
3669 let text_1 = indoc!(
3670 "
3671 BAR
3672 "
3673 );
3674 let base_text_2 = indoc!(
3675 "
3676 foo
3677 "
3678 );
3679 let text_2 = indoc!(
3680 "
3681 FOO
3682 "
3683 );
3684
3685 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3686 let buffer_2 = cx.new(|cx| Buffer::local(text_2, cx));
3687 let diff_1 = cx.new(|cx| {
3688 BufferDiff::new_with_base_text(base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3689 });
3690 let diff_2 = cx.new(|cx| {
3691 BufferDiff::new_with_base_text(base_text_2, &buffer_2.read(cx).text_snapshot(), cx)
3692 });
3693 cx.run_until_parked();
3694
3695 let multibuffer = cx.new(|cx| {
3696 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3697 multibuffer.set_all_diff_hunks_expanded(cx);
3698 multibuffer.set_excerpts_for_path(
3699 PathKey::sorted(0),
3700 buffer_1.clone(),
3701 [Point::zero()..buffer_1.read(cx).max_point()],
3702 0,
3703 cx,
3704 );
3705 multibuffer.set_excerpts_for_path(
3706 PathKey::sorted(1),
3707 buffer_2.clone(),
3708 [Point::zero()..buffer_2.read(cx).max_point()],
3709 0,
3710 cx,
3711 );
3712 multibuffer.add_diff(diff_1.clone(), cx);
3713 multibuffer.add_diff(diff_2.clone(), cx);
3714 multibuffer
3715 });
3716
3717 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3718 (multibuffer.snapshot(cx), multibuffer.subscribe())
3719 });
3720
3721 assert_new_snapshot(
3722 &multibuffer,
3723 &mut snapshot,
3724 &mut subscription,
3725 cx,
3726 indoc!(
3727 "
3728 - bar
3729 + BAR
3730
3731 - foo
3732 + FOO
3733 "
3734 ),
3735 );
3736
3737 let anchor_1 = multibuffer.read_with(cx, |multibuffer, cx| {
3738 multibuffer
3739 .buffer_anchor_to_anchor(
3740 &buffer_1,
3741 text::Anchor::min_for_buffer(buffer_1.read(cx).remote_id()),
3742 cx,
3743 )
3744 .unwrap()
3745 });
3746 let point_1 = snapshot.summaries_for_anchors::<Point, _>([&anchor_1])[0];
3747 assert_eq!(point_1, Point::new(0, 0));
3748
3749 let anchor_2 = multibuffer.read_with(cx, |multibuffer, cx| {
3750 multibuffer
3751 .buffer_anchor_to_anchor(
3752 &buffer_2,
3753 text::Anchor::min_for_buffer(buffer_2.read(cx).remote_id()),
3754 cx,
3755 )
3756 .unwrap()
3757 });
3758 let point_2 = snapshot.summaries_for_anchors::<Point, _>([&anchor_2])[0];
3759 assert_eq!(point_2, Point::new(3, 0));
3760}
3761
3762#[gpui::test]
3763async fn test_trailing_deletion_without_newline(cx: &mut TestAppContext) {
3764 let base_text_1 = "one\ntwo".to_owned();
3765 let text_1 = "one\n".to_owned();
3766
3767 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3768 let diff_1 = cx.new(|cx| {
3769 BufferDiff::new_with_base_text(&base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3770 });
3771 cx.run_until_parked();
3772
3773 let multibuffer = cx.new(|cx| {
3774 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3775 multibuffer.set_excerpts_for_path(
3776 PathKey::sorted(0),
3777 buffer_1.clone(),
3778 [Point::zero()..buffer_1.read(cx).max_point()],
3779 0,
3780 cx,
3781 );
3782 multibuffer.add_diff(diff_1.clone(), cx);
3783 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
3784 multibuffer
3785 });
3786
3787 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3788 (multibuffer.snapshot(cx), multibuffer.subscribe())
3789 });
3790
3791 assert_new_snapshot(
3792 &multibuffer,
3793 &mut snapshot,
3794 &mut subscription,
3795 cx,
3796 indoc!(
3797 "
3798 one
3799 - two
3800 "
3801 ),
3802 );
3803
3804 assert_eq!(snapshot.max_point(), Point::new(2, 0));
3805 assert_eq!(snapshot.len().0, 8);
3806
3807 assert_eq!(
3808 snapshot
3809 .dimensions_from_points::<Point>([Point::new(2, 0)])
3810 .collect::<Vec<_>>(),
3811 vec![Point::new(2, 0)]
3812 );
3813
3814 let (_, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3815 assert_eq!(translated_offset.0, "one\n".len());
3816 let (_, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3817 assert_eq!(translated_point, Point::new(1, 0));
3818
3819 // The same, for an excerpt that's not at the end of the multibuffer.
3820
3821 let text_2 = "foo\n".to_owned();
3822 let buffer_2 = cx.new(|cx| Buffer::local(&text_2, cx));
3823 multibuffer.update(cx, |multibuffer, cx| {
3824 multibuffer.set_excerpt_ranges_for_path(
3825 PathKey::sorted(1),
3826 buffer_2.clone(),
3827 &buffer_2.read(cx).snapshot(),
3828 vec![ExcerptRange::new(Point::new(0, 0)..Point::new(1, 0))],
3829 cx,
3830 );
3831 });
3832
3833 assert_new_snapshot(
3834 &multibuffer,
3835 &mut snapshot,
3836 &mut subscription,
3837 cx,
3838 indoc!(
3839 "
3840 one
3841 - two
3842
3843 foo
3844 "
3845 ),
3846 );
3847
3848 assert_eq!(
3849 snapshot
3850 .dimensions_from_points::<Point>([Point::new(2, 0)])
3851 .collect::<Vec<_>>(),
3852 vec![Point::new(2, 0)]
3853 );
3854
3855 let buffer_1_id = buffer_1.read_with(cx, |buffer_1, _| buffer_1.remote_id());
3856 let (buffer, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3857 assert_eq!(buffer.remote_id(), buffer_1_id);
3858 assert_eq!(translated_offset.0, "one\n".len());
3859 let (buffer, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3860 assert_eq!(buffer.remote_id(), buffer_1_id);
3861 assert_eq!(translated_point, Point::new(1, 0));
3862}
3863
3864fn format_diff(
3865 text: &str,
3866 row_infos: &Vec<RowInfo>,
3867 boundary_rows: &HashSet<MultiBufferRow>,
3868 has_diff: Option<bool>,
3869) -> String {
3870 let has_diff =
3871 has_diff.unwrap_or_else(|| row_infos.iter().any(|info| info.diff_status.is_some()));
3872 text.split('\n')
3873 .enumerate()
3874 .zip(row_infos)
3875 .map(|((ix, line), info)| {
3876 let marker = match info.diff_status.map(|status| status.kind) {
3877 Some(DiffHunkStatusKind::Added) => "+ ",
3878 Some(DiffHunkStatusKind::Deleted) => "- ",
3879 Some(DiffHunkStatusKind::Modified) => unreachable!(),
3880 None => {
3881 if has_diff && !line.is_empty() {
3882 " "
3883 } else {
3884 ""
3885 }
3886 }
3887 };
3888 let boundary_row = if boundary_rows.contains(&MultiBufferRow(ix as u32)) {
3889 if has_diff {
3890 " ----------\n"
3891 } else {
3892 "---------\n"
3893 }
3894 } else {
3895 ""
3896 };
3897 let expand = info
3898 .expand_info
3899 .as_ref()
3900 .map(|expand_info| match expand_info.direction {
3901 ExpandExcerptDirection::Up => " [↑]",
3902 ExpandExcerptDirection::Down => " [↓]",
3903 ExpandExcerptDirection::UpAndDown => " [↕]",
3904 })
3905 .unwrap_or_default();
3906
3907 format!("{boundary_row}{marker}{line}{expand}")
3908 // let mbr = info
3909 // .multibuffer_row
3910 // .map(|row| format!("{:0>3}", row.0))
3911 // .unwrap_or_else(|| "???".to_string());
3912 // let byte_range = format!("{byte_range_start:0>3}..{byte_range_end:0>3}");
3913 // format!("{boundary_row}Row: {mbr}, Bytes: {byte_range} | {marker}{line}{expand}")
3914 })
3915 .collect::<Vec<_>>()
3916 .join("\n")
3917}
3918
3919// fn format_transforms(snapshot: &MultiBufferSnapshot) -> String {
3920// snapshot
3921// .diff_transforms
3922// .iter()
3923// .map(|transform| {
3924// let (kind, summary) = match transform {
3925// DiffTransform::DeletedHunk { summary, .. } => (" Deleted", (*summary).into()),
3926// DiffTransform::FilteredInsertedHunk { summary, .. } => (" Filtered", *summary),
3927// DiffTransform::InsertedHunk { summary, .. } => (" Inserted", *summary),
3928// DiffTransform::Unmodified { summary, .. } => ("Unmodified", *summary),
3929// };
3930// format!("{kind}(len: {}, lines: {:?})", summary.len, summary.lines)
3931// })
3932// .join("\n")
3933// }
3934
3935// fn format_excerpts(snapshot: &MultiBufferSnapshot) -> String {
3936// snapshot
3937// .excerpts
3938// .iter()
3939// .map(|excerpt| {
3940// format!(
3941// "Excerpt(buffer_range = {:?}, lines = {:?}, has_trailing_newline = {:?})",
3942// excerpt.range.context.to_point(&excerpt.buffer),
3943// excerpt.text_summary.lines,
3944// excerpt.has_trailing_newline
3945// )
3946// })
3947// .join("\n")
3948// }
3949
3950#[gpui::test]
3951async fn test_singleton_with_inverted_diff(cx: &mut TestAppContext) {
3952 let text = indoc!(
3953 "
3954 ZERO
3955 one
3956 TWO
3957 three
3958 six
3959 "
3960 );
3961 let base_text = indoc!(
3962 "
3963 one
3964 two
3965 three
3966 four
3967 five
3968 six
3969 "
3970 );
3971
3972 let buffer = cx.new(|cx| Buffer::local(text, cx));
3973 let diff = cx
3974 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
3975 cx.run_until_parked();
3976
3977 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3978
3979 let multibuffer = cx.new(|cx| {
3980 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
3981 multibuffer.set_all_diff_hunks_expanded(cx);
3982 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
3983 multibuffer
3984 });
3985
3986 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3987 (multibuffer.snapshot(cx), multibuffer.subscribe())
3988 });
3989
3990 assert_eq!(snapshot.text(), base_text);
3991 assert_new_snapshot(
3992 &multibuffer,
3993 &mut snapshot,
3994 &mut subscription,
3995 cx,
3996 indoc!(
3997 "
3998 one
3999 - two
4000 three
4001 - four
4002 - five
4003 six
4004 "
4005 ),
4006 );
4007
4008 buffer.update(cx, |buffer, cx| {
4009 buffer.edit_via_marked_text(
4010 indoc!(
4011 "
4012 ZERO
4013 one
4014 «<inserted>»W«O
4015 T»hree
4016 six
4017 "
4018 ),
4019 None,
4020 cx,
4021 );
4022 });
4023 cx.run_until_parked();
4024 let update = diff
4025 .update(cx, |diff, cx| {
4026 diff.update_diff(
4027 buffer.read(cx).text_snapshot(),
4028 Some(base_text.into()),
4029 None,
4030 None,
4031 cx,
4032 )
4033 })
4034 .await;
4035 diff.update(cx, |diff, cx| {
4036 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4037 })
4038 .await;
4039 cx.run_until_parked();
4040
4041 assert_new_snapshot(
4042 &multibuffer,
4043 &mut snapshot,
4044 &mut subscription,
4045 cx,
4046 indoc! {
4047 "
4048 one
4049 - two
4050 - three
4051 - four
4052 - five
4053 six
4054 "
4055 },
4056 );
4057
4058 buffer.update(cx, |buffer, cx| {
4059 buffer.set_text("ZERO\nONE\nTWO\n", cx);
4060 });
4061 cx.run_until_parked();
4062 let update = diff
4063 .update(cx, |diff, cx| {
4064 diff.update_diff(
4065 buffer.read(cx).text_snapshot(),
4066 Some(base_text.into()),
4067 None,
4068 None,
4069 cx,
4070 )
4071 })
4072 .await;
4073 diff.update(cx, |diff, cx| {
4074 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4075 })
4076 .await;
4077 cx.run_until_parked();
4078
4079 assert_new_snapshot(
4080 &multibuffer,
4081 &mut snapshot,
4082 &mut subscription,
4083 cx,
4084 indoc! {
4085 "
4086 - one
4087 - two
4088 - three
4089 - four
4090 - five
4091 - six
4092 "
4093 },
4094 );
4095
4096 diff.update(cx, |diff, cx| {
4097 diff.set_base_text(
4098 Some("new base\n".into()),
4099 None,
4100 buffer.read(cx).text_snapshot(),
4101 cx,
4102 )
4103 })
4104 .await
4105 .unwrap();
4106 cx.run_until_parked();
4107
4108 assert_new_snapshot(
4109 &multibuffer,
4110 &mut snapshot,
4111 &mut subscription,
4112 cx,
4113 indoc! {"
4114 - new base
4115 "},
4116 );
4117}
4118
4119#[gpui::test]
4120async fn test_inverted_diff_base_text_change(cx: &mut TestAppContext) {
4121 let base_text = "aaa\nbbb\nccc\n";
4122 let text = "ddd\n";
4123 let buffer = cx.new(|cx| Buffer::local(text, cx));
4124 let diff = cx
4125 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4126 cx.run_until_parked();
4127
4128 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4129
4130 let multibuffer = cx.new(|cx| {
4131 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4132 multibuffer.set_all_diff_hunks_expanded(cx);
4133 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
4134 multibuffer
4135 });
4136
4137 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
4138 (multibuffer.snapshot(cx), multibuffer.subscribe())
4139 });
4140
4141 assert_eq!(snapshot.text(), base_text);
4142 assert_new_snapshot(
4143 &multibuffer,
4144 &mut snapshot,
4145 &mut subscription,
4146 cx,
4147 indoc!(
4148 "
4149 - aaa
4150 - bbb
4151 - ccc
4152 "
4153 ),
4154 );
4155
4156 let update = diff
4157 .update(cx, |diff, cx| {
4158 diff.update_diff(
4159 buffer.read(cx).text_snapshot(),
4160 Some("ddd\n".into()),
4161 Some(true),
4162 None,
4163 cx,
4164 )
4165 })
4166 .await;
4167 diff.update(cx, |diff, cx| {
4168 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4169 })
4170 .detach();
4171
4172 let _hunks: Vec<_> = multibuffer
4173 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4174 .diff_hunks()
4175 .collect();
4176}
4177
4178#[gpui::test]
4179async fn test_inverted_diff_secondary_version_mismatch(cx: &mut TestAppContext) {
4180 let base_text = "one\ntwo\nthree\nfour\nfive\n";
4181 let index_text = "one\nTWO\nthree\nfour\nfive\n";
4182 let buffer_text = "one\nTWO\nthree\nFOUR\nfive\n";
4183
4184 let buffer = cx.new(|cx| Buffer::local(buffer_text, cx));
4185
4186 let unstaged_diff = cx
4187 .new(|cx| BufferDiff::new_with_base_text(index_text, &buffer.read(cx).text_snapshot(), cx));
4188 cx.run_until_parked();
4189
4190 let uncommitted_diff = cx.new(|cx| {
4191 let mut diff =
4192 BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx);
4193 diff.set_secondary_diff(unstaged_diff.clone());
4194 diff
4195 });
4196 cx.run_until_parked();
4197
4198 buffer.update(cx, |buffer, cx| {
4199 buffer.edit([(0..0, "ZERO\n")], None, cx);
4200 });
4201
4202 let update = unstaged_diff
4203 .update(cx, |diff, cx| {
4204 diff.update_diff(
4205 buffer.read(cx).text_snapshot(),
4206 Some(index_text.into()),
4207 None,
4208 None,
4209 cx,
4210 )
4211 })
4212 .await;
4213 unstaged_diff
4214 .update(cx, |diff, cx| {
4215 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4216 })
4217 .await;
4218
4219 let base_text_buffer =
4220 uncommitted_diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4221
4222 let multibuffer = cx.new(|cx| {
4223 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4224 multibuffer.set_all_diff_hunks_expanded(cx);
4225 multibuffer.add_inverted_diff(uncommitted_diff.clone(), buffer.clone(), cx);
4226 multibuffer
4227 });
4228
4229 let _hunks: Vec<_> = multibuffer
4230 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4231 .diff_hunks()
4232 .collect();
4233}
4234
4235#[track_caller]
4236fn assert_excerpts_match(
4237 multibuffer: &Entity<MultiBuffer>,
4238 cx: &mut TestAppContext,
4239 expected: &str,
4240) {
4241 let mut output = String::new();
4242 multibuffer.read_with(cx, |multibuffer, cx| {
4243 for (buffer, info) in multibuffer.snapshot(cx).excerpts() {
4244 output.push_str("-----\n");
4245 output.extend(buffer.text_for_range(info.range));
4246 if !output.ends_with('\n') {
4247 output.push('\n');
4248 }
4249 }
4250 });
4251 assert_eq!(output, expected);
4252}
4253
4254#[track_caller]
4255fn assert_new_snapshot(
4256 multibuffer: &Entity<MultiBuffer>,
4257 snapshot: &mut MultiBufferSnapshot,
4258 subscription: &mut Subscription<MultiBufferOffset>,
4259 cx: &mut TestAppContext,
4260 expected_diff: &str,
4261) {
4262 let new_snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4263 let actual_text = new_snapshot.text();
4264 let line_infos = new_snapshot
4265 .row_infos(MultiBufferRow(0))
4266 .collect::<Vec<_>>();
4267 let actual_diff = format_diff(&actual_text, &line_infos, &Default::default(), None);
4268 pretty_assertions::assert_eq!(actual_diff, expected_diff);
4269 check_edits(
4270 snapshot,
4271 &new_snapshot,
4272 &subscription.consume().into_inner(),
4273 );
4274 *snapshot = new_snapshot;
4275}
4276
4277#[track_caller]
4278fn check_edits(
4279 old_snapshot: &MultiBufferSnapshot,
4280 new_snapshot: &MultiBufferSnapshot,
4281 edits: &[Edit<MultiBufferOffset>],
4282) {
4283 let mut text = old_snapshot.text();
4284 let new_text = new_snapshot.text();
4285 for edit in edits.iter().rev() {
4286 if !text.is_char_boundary(edit.old.start.0)
4287 || !text.is_char_boundary(edit.old.end.0)
4288 || !new_text.is_char_boundary(edit.new.start.0)
4289 || !new_text.is_char_boundary(edit.new.end.0)
4290 {
4291 panic!(
4292 "invalid edits: {:?}\nold text: {:?}\nnew text: {:?}",
4293 edits, text, new_text
4294 );
4295 }
4296
4297 text.replace_range(
4298 edit.old.start.0..edit.old.end.0,
4299 &new_text[edit.new.start.0..edit.new.end.0],
4300 );
4301 }
4302
4303 pretty_assertions::assert_eq!(text, new_text, "invalid edits: {:?}", edits);
4304}
4305
4306#[track_caller]
4307fn assert_chunks_in_ranges(snapshot: &MultiBufferSnapshot) {
4308 let full_text = snapshot.text();
4309 for ix in 0..full_text.len() {
4310 let mut chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4311 chunks.seek(MultiBufferOffset(ix)..snapshot.len());
4312 let tail = chunks.map(|chunk| chunk.text).collect::<String>();
4313 assert_eq!(tail, &full_text[ix..], "seek to range: {:?}", ix..);
4314 }
4315}
4316
4317#[track_caller]
4318fn assert_consistent_line_numbers(snapshot: &MultiBufferSnapshot) {
4319 let all_line_numbers = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
4320 for start_row in 1..all_line_numbers.len() {
4321 let line_numbers = snapshot
4322 .row_infos(MultiBufferRow(start_row as u32))
4323 .collect::<Vec<_>>();
4324 assert_eq!(
4325 line_numbers,
4326 all_line_numbers[start_row..],
4327 "start_row: {start_row}"
4328 );
4329 }
4330}
4331
4332#[track_caller]
4333fn assert_position_translation(snapshot: &MultiBufferSnapshot) {
4334 let text = Rope::from(snapshot.text());
4335
4336 let mut left_anchors = Vec::new();
4337 let mut right_anchors = Vec::new();
4338 let mut offsets = Vec::new();
4339 let mut points = Vec::new();
4340 for offset in 0..=text.len() + 1 {
4341 let offset = MultiBufferOffset(offset);
4342 let clipped_left = snapshot.clip_offset(offset, Bias::Left);
4343 let clipped_right = snapshot.clip_offset(offset, Bias::Right);
4344 assert_eq!(
4345 clipped_left.0,
4346 text.clip_offset(offset.0, Bias::Left),
4347 "clip_offset({offset:?}, Left)"
4348 );
4349 assert_eq!(
4350 clipped_right.0,
4351 text.clip_offset(offset.0, Bias::Right),
4352 "clip_offset({offset:?}, Right)"
4353 );
4354 assert_eq!(
4355 snapshot.offset_to_point(clipped_left),
4356 text.offset_to_point(clipped_left.0),
4357 "offset_to_point({})",
4358 clipped_left.0
4359 );
4360 assert_eq!(
4361 snapshot.offset_to_point(clipped_right),
4362 text.offset_to_point(clipped_right.0),
4363 "offset_to_point({})",
4364 clipped_right.0
4365 );
4366 let anchor_after = snapshot.anchor_after(clipped_left);
4367 assert_eq!(
4368 anchor_after.to_offset(snapshot),
4369 clipped_left,
4370 "anchor_after({}).to_offset {anchor_after:?}",
4371 clipped_left.0
4372 );
4373 let anchor_before = snapshot.anchor_before(clipped_left);
4374 assert_eq!(
4375 anchor_before.to_offset(snapshot),
4376 clipped_left,
4377 "anchor_before({}).to_offset",
4378 clipped_left.0
4379 );
4380 left_anchors.push(anchor_before);
4381 right_anchors.push(anchor_after);
4382 offsets.push(clipped_left);
4383 points.push(text.offset_to_point(clipped_left.0));
4384 }
4385
4386 for row in 0..text.max_point().row {
4387 for column in 0..text.line_len(row) + 1 {
4388 let point = Point { row, column };
4389 let clipped_left = snapshot.clip_point(point, Bias::Left);
4390 let clipped_right = snapshot.clip_point(point, Bias::Right);
4391 assert_eq!(
4392 clipped_left,
4393 text.clip_point(point, Bias::Left),
4394 "clip_point({point:?}, Left)"
4395 );
4396 assert_eq!(
4397 clipped_right,
4398 text.clip_point(point, Bias::Right),
4399 "clip_point({point:?}, Right)"
4400 );
4401 assert_eq!(
4402 snapshot.point_to_offset(clipped_left).0,
4403 text.point_to_offset(clipped_left),
4404 "point_to_offset({clipped_left:?})"
4405 );
4406 assert_eq!(
4407 snapshot.point_to_offset(clipped_right).0,
4408 text.point_to_offset(clipped_right),
4409 "point_to_offset({clipped_right:?})"
4410 );
4411 }
4412 }
4413
4414 assert_eq!(
4415 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&left_anchors),
4416 offsets,
4417 "left_anchors <-> offsets"
4418 );
4419 assert_eq!(
4420 snapshot.summaries_for_anchors::<Point, _>(&left_anchors),
4421 points,
4422 "left_anchors <-> points"
4423 );
4424 assert_eq!(
4425 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&right_anchors),
4426 offsets,
4427 "right_anchors <-> offsets"
4428 );
4429 assert_eq!(
4430 snapshot.summaries_for_anchors::<Point, _>(&right_anchors),
4431 points,
4432 "right_anchors <-> points"
4433 );
4434
4435 for (anchors, bias) in [(&left_anchors, Bias::Left), (&right_anchors, Bias::Right)] {
4436 for (ix, (offset, anchor)) in offsets.iter().zip(anchors).enumerate() {
4437 if ix > 0 && *offset == MultiBufferOffset(252) && offset > &offsets[ix - 1] {
4438 let prev_anchor = left_anchors[ix - 1];
4439 assert!(
4440 anchor.cmp(&prev_anchor, snapshot).is_gt(),
4441 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_gt()",
4442 offsets[ix],
4443 offsets[ix - 1],
4444 );
4445 assert!(
4446 prev_anchor.cmp(anchor, snapshot).is_lt(),
4447 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_lt()",
4448 offsets[ix - 1],
4449 offsets[ix],
4450 );
4451 }
4452 }
4453 }
4454
4455 if let Some((buffer, offset)) = snapshot.point_to_buffer_offset(snapshot.max_point()) {
4456 assert!(offset.0 <= buffer.len());
4457 }
4458 if let Some((buffer, point)) = snapshot.point_to_buffer_point(snapshot.max_point()) {
4459 assert!(point <= buffer.max_point());
4460 }
4461}
4462
4463fn assert_line_indents(snapshot: &MultiBufferSnapshot) {
4464 let max_row = snapshot.max_point().row;
4465 let buffer_id = snapshot.excerpts().next().unwrap().1.buffer_id;
4466 let text = text::Buffer::new(ReplicaId::LOCAL, buffer_id, snapshot.text());
4467 let mut line_indents = text
4468 .line_indents_in_row_range(0..max_row + 1)
4469 .collect::<Vec<_>>();
4470 for start_row in 0..snapshot.max_point().row {
4471 pretty_assertions::assert_eq!(
4472 snapshot
4473 .line_indents(MultiBufferRow(start_row), |_| true)
4474 .map(|(row, indent, _)| (row.0, indent))
4475 .collect::<Vec<_>>(),
4476 &line_indents[(start_row as usize)..],
4477 "line_indents({start_row})"
4478 );
4479 }
4480
4481 line_indents.reverse();
4482 pretty_assertions::assert_eq!(
4483 snapshot
4484 .reversed_line_indents(MultiBufferRow(max_row), |_| true)
4485 .map(|(row, indent, _)| (row.0, indent))
4486 .collect::<Vec<_>>(),
4487 &line_indents[..],
4488 "reversed_line_indents({max_row})"
4489 );
4490}
4491
4492#[gpui::test]
4493fn test_new_empty_buffer_uses_untitled_title(cx: &mut App) {
4494 let buffer = cx.new(|cx| Buffer::local("", cx));
4495 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4496
4497 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4498}
4499
4500#[gpui::test]
4501fn test_new_empty_buffer_uses_untitled_title_when_only_contains_whitespace(cx: &mut App) {
4502 let buffer = cx.new(|cx| Buffer::local("\n ", cx));
4503 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4504
4505 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4506}
4507
4508#[gpui::test]
4509fn test_new_empty_buffer_takes_first_line_for_title(cx: &mut App) {
4510 let buffer = cx.new(|cx| Buffer::local("Hello World\nSecond line", cx));
4511 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4512
4513 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4514}
4515
4516#[gpui::test]
4517fn test_new_empty_buffer_takes_trimmed_first_line_for_title(cx: &mut App) {
4518 let buffer = cx.new(|cx| Buffer::local("\nHello, World ", cx));
4519 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4520
4521 assert_eq!(multibuffer.read(cx).title(cx), "Hello, World");
4522}
4523
4524#[gpui::test]
4525fn test_new_empty_buffer_uses_truncated_first_line_for_title(cx: &mut App) {
4526 let title = "aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeee";
4527 let title_after = "aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd";
4528 let buffer = cx.new(|cx| Buffer::local(title, cx));
4529 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4530
4531 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4532}
4533
4534#[gpui::test]
4535fn test_new_empty_buffer_uses_truncated_first_line_for_title_after_merging_adjacent_spaces(
4536 cx: &mut App,
4537) {
4538 let title = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddddeeeeeeeeee";
4539 let title_after = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddd";
4540 let buffer = cx.new(|cx| Buffer::local(title, cx));
4541 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4542
4543 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4544}
4545
4546#[gpui::test]
4547fn test_new_empty_buffers_title_can_be_set(cx: &mut App) {
4548 let buffer = cx.new(|cx| Buffer::local("Hello World", cx));
4549 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4550 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4551
4552 multibuffer.update(cx, |multibuffer, cx| {
4553 multibuffer.set_title("Hey".into(), cx)
4554 });
4555 assert_eq!(multibuffer.read(cx).title(cx), "Hey");
4556}
4557
4558#[gpui::test(iterations = 100)]
4559fn test_random_chunk_bitmaps(cx: &mut App, mut rng: StdRng) {
4560 let multibuffer = if rng.random() {
4561 let len = rng.random_range(0..10000);
4562 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4563 let buffer = cx.new(|cx| Buffer::local(text, cx));
4564 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4565 } else {
4566 MultiBuffer::build_random(&mut rng, cx)
4567 };
4568
4569 let snapshot = multibuffer.read(cx).snapshot(cx);
4570
4571 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4572
4573 for chunk in chunks {
4574 let chunk_text = chunk.text;
4575 let chars_bitmap = chunk.chars;
4576 let tabs_bitmap = chunk.tabs;
4577
4578 if chunk_text.is_empty() {
4579 assert_eq!(
4580 chars_bitmap, 0,
4581 "Empty chunk should have empty chars bitmap"
4582 );
4583 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4584 continue;
4585 }
4586
4587 assert!(
4588 chunk_text.len() <= 128,
4589 "Chunk text length {} exceeds 128 bytes",
4590 chunk_text.len()
4591 );
4592
4593 // Verify chars bitmap
4594 let char_indices = chunk_text
4595 .char_indices()
4596 .map(|(i, _)| i)
4597 .collect::<Vec<_>>();
4598
4599 for byte_idx in 0..chunk_text.len() {
4600 let should_have_bit = char_indices.contains(&byte_idx);
4601 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4602
4603 if has_bit != should_have_bit {
4604 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4605 eprintln!("Char indices: {:?}", char_indices);
4606 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4607 }
4608
4609 assert_eq!(
4610 has_bit, should_have_bit,
4611 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4612 byte_idx, chunk_text, should_have_bit, has_bit
4613 );
4614 }
4615
4616 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4617 let is_tab = byte == b'\t';
4618 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4619
4620 if has_bit != is_tab {
4621 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4622 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4623 assert_eq!(
4624 has_bit, is_tab,
4625 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4626 byte_idx, chunk_text, byte as char, is_tab, has_bit
4627 );
4628 }
4629 }
4630 }
4631}
4632
4633#[gpui::test(iterations = 10)]
4634fn test_random_chunk_bitmaps_with_diffs(cx: &mut App, mut rng: StdRng) {
4635 let settings_store = SettingsStore::test(cx);
4636 cx.set_global(settings_store);
4637 use buffer_diff::BufferDiff;
4638 use util::RandomCharIter;
4639
4640 let multibuffer = if rng.random() {
4641 let len = rng.random_range(100..10000);
4642 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4643 let buffer = cx.new(|cx| Buffer::local(text, cx));
4644 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4645 } else {
4646 MultiBuffer::build_random(&mut rng, cx)
4647 };
4648
4649 let _diff_count = rng.random_range(1..5);
4650 let mut diffs = Vec::new();
4651
4652 multibuffer.update(cx, |multibuffer, cx| {
4653 for buffer_id in multibuffer.all_buffer_ids() {
4654 if rng.random_bool(0.7) {
4655 if let Some(buffer_handle) = multibuffer.buffer(buffer_id) {
4656 let buffer_text = buffer_handle.read(cx).text();
4657 let mut base_text = String::new();
4658
4659 for line in buffer_text.lines() {
4660 if rng.random_bool(0.3) {
4661 continue;
4662 } else if rng.random_bool(0.3) {
4663 let line_len = rng.random_range(0..50);
4664 let modified_line = RandomCharIter::new(&mut rng)
4665 .take(line_len)
4666 .collect::<String>();
4667 base_text.push_str(&modified_line);
4668 base_text.push('\n');
4669 } else {
4670 base_text.push_str(line);
4671 base_text.push('\n');
4672 }
4673 }
4674
4675 if rng.random_bool(0.5) {
4676 let extra_lines = rng.random_range(1..5);
4677 for _ in 0..extra_lines {
4678 let line_len = rng.random_range(0..50);
4679 let extra_line = RandomCharIter::new(&mut rng)
4680 .take(line_len)
4681 .collect::<String>();
4682 base_text.push_str(&extra_line);
4683 base_text.push('\n');
4684 }
4685 }
4686
4687 let diff = cx.new(|cx| {
4688 BufferDiff::new_with_base_text(
4689 &base_text,
4690 &buffer_handle.read(cx).text_snapshot(),
4691 cx,
4692 )
4693 });
4694 diffs.push(diff.clone());
4695 multibuffer.add_diff(diff, cx);
4696 }
4697 }
4698 }
4699 });
4700
4701 multibuffer.update(cx, |multibuffer, cx| {
4702 if rng.random_bool(0.5) {
4703 multibuffer.set_all_diff_hunks_expanded(cx);
4704 } else {
4705 let snapshot = multibuffer.snapshot(cx);
4706 let text = snapshot.text();
4707
4708 let mut ranges = Vec::new();
4709 for _ in 0..rng.random_range(1..5) {
4710 if snapshot.len().0 == 0 {
4711 break;
4712 }
4713
4714 let diff_size = rng.random_range(5..1000);
4715 let mut start = rng.random_range(0..snapshot.len().0);
4716
4717 while !text.is_char_boundary(start) {
4718 start = start.saturating_sub(1);
4719 }
4720
4721 let mut end = rng.random_range(start..snapshot.len().0.min(start + diff_size));
4722
4723 while !text.is_char_boundary(end) {
4724 end = end.saturating_add(1);
4725 }
4726 let start_anchor = snapshot.anchor_after(MultiBufferOffset(start));
4727 let end_anchor = snapshot.anchor_before(MultiBufferOffset(end));
4728 ranges.push(start_anchor..end_anchor);
4729 }
4730 multibuffer.expand_diff_hunks(ranges, cx);
4731 }
4732 });
4733
4734 let snapshot = multibuffer.read(cx).snapshot(cx);
4735
4736 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4737
4738 for chunk in chunks {
4739 let chunk_text = chunk.text;
4740 let chars_bitmap = chunk.chars;
4741 let tabs_bitmap = chunk.tabs;
4742
4743 if chunk_text.is_empty() {
4744 assert_eq!(
4745 chars_bitmap, 0,
4746 "Empty chunk should have empty chars bitmap"
4747 );
4748 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4749 continue;
4750 }
4751
4752 assert!(
4753 chunk_text.len() <= 128,
4754 "Chunk text length {} exceeds 128 bytes",
4755 chunk_text.len()
4756 );
4757
4758 let char_indices = chunk_text
4759 .char_indices()
4760 .map(|(i, _)| i)
4761 .collect::<Vec<_>>();
4762
4763 for byte_idx in 0..chunk_text.len() {
4764 let should_have_bit = char_indices.contains(&byte_idx);
4765 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4766
4767 if has_bit != should_have_bit {
4768 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4769 eprintln!("Char indices: {:?}", char_indices);
4770 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4771 }
4772
4773 assert_eq!(
4774 has_bit, should_have_bit,
4775 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4776 byte_idx, chunk_text, should_have_bit, has_bit
4777 );
4778 }
4779
4780 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4781 let is_tab = byte == b'\t';
4782 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4783
4784 if has_bit != is_tab {
4785 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4786 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4787 assert_eq!(
4788 has_bit, is_tab,
4789 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4790 byte_idx, chunk_text, byte as char, is_tab, has_bit
4791 );
4792 }
4793 }
4794 }
4795}
4796
4797fn collect_word_diffs(
4798 base_text: &str,
4799 modified_text: &str,
4800 cx: &mut TestAppContext,
4801) -> Vec<String> {
4802 let buffer = cx.new(|cx| Buffer::local(modified_text, cx));
4803 let diff = cx
4804 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4805 cx.run_until_parked();
4806
4807 let multibuffer = cx.new(|cx| {
4808 let mut multibuffer = MultiBuffer::singleton(buffer.clone(), cx);
4809 multibuffer.add_diff(diff.clone(), cx);
4810 multibuffer
4811 });
4812
4813 multibuffer.update(cx, |multibuffer, cx| {
4814 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
4815 });
4816
4817 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4818 let text = snapshot.text();
4819
4820 snapshot
4821 .diff_hunks()
4822 .flat_map(|hunk| hunk.word_diffs)
4823 .map(|range| text[range.start.0..range.end.0].to_string())
4824 .collect()
4825}
4826
4827#[gpui::test]
4828async fn test_word_diff_simple_replacement(cx: &mut TestAppContext) {
4829 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4830 cx.set_global(settings_store);
4831
4832 let base_text = "hello world foo bar\n";
4833 let modified_text = "hello WORLD foo BAR\n";
4834
4835 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4836
4837 assert_eq!(word_diffs, vec!["world", "bar", "WORLD", "BAR"]);
4838}
4839
4840#[gpui::test]
4841async fn test_word_diff_white_space(cx: &mut TestAppContext) {
4842 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4843 cx.set_global(settings_store);
4844
4845 let base_text = "hello world foo bar\n";
4846 let modified_text = " hello world foo bar\n";
4847
4848 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4849
4850 assert_eq!(word_diffs, vec![" "]);
4851}
4852
4853#[gpui::test]
4854async fn test_word_diff_consecutive_modified_lines(cx: &mut TestAppContext) {
4855 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4856 cx.set_global(settings_store);
4857
4858 let base_text = "aaa bbb\nccc ddd\n";
4859 let modified_text = "aaa BBB\nccc DDD\n";
4860
4861 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4862
4863 assert_eq!(
4864 word_diffs,
4865 vec!["bbb", "ddd", "BBB", "DDD"],
4866 "consecutive modified lines should produce word diffs when line counts match"
4867 );
4868}
4869
4870#[gpui::test]
4871async fn test_word_diff_modified_lines_with_deletion_between(cx: &mut TestAppContext) {
4872 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4873 cx.set_global(settings_store);
4874
4875 let base_text = "aaa bbb\ndeleted line\nccc ddd\n";
4876 let modified_text = "aaa BBB\nccc DDD\n";
4877
4878 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4879
4880 assert_eq!(
4881 word_diffs,
4882 Vec::<String>::new(),
4883 "modified lines with a deleted line between should not produce word diffs"
4884 );
4885}
4886
4887#[gpui::test]
4888async fn test_word_diff_disabled(cx: &mut TestAppContext) {
4889 let settings_store = cx.update(|cx| {
4890 let mut settings_store = SettingsStore::test(cx);
4891 settings_store.update_user_settings(cx, |settings| {
4892 settings.project.all_languages.defaults.word_diff_enabled = Some(false);
4893 });
4894 settings_store
4895 });
4896 cx.set_global(settings_store);
4897
4898 let base_text = "hello world\n";
4899 let modified_text = "hello WORLD\n";
4900
4901 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4902
4903 assert_eq!(
4904 word_diffs,
4905 Vec::<String>::new(),
4906 "word diffs should be empty when disabled"
4907 );
4908}
4909
4910/// Tests `excerpt_containing` and `excerpts_for_range` (functions mapping multi-buffer text-coordinates to excerpts)
4911#[gpui::test]
4912fn test_excerpts_containment_functions(cx: &mut App) {
4913 // Multibuffer content for these tests:
4914 // 0123
4915 // 0: aa0
4916 // 1: aa1
4917 // -----
4918 // 2: bb0
4919 // 3: bb1
4920 // -----MultiBufferOffset(0)..
4921 // 4: cc0
4922
4923 let buffer_1 = cx.new(|cx| Buffer::local("aa0\naa1", cx));
4924 let buffer_2 = cx.new(|cx| Buffer::local("bb0\nbb1", cx));
4925 let buffer_3 = cx.new(|cx| Buffer::local("cc0", cx));
4926
4927 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
4928
4929 let (excerpt_1_info, excerpt_2_info, excerpt_3_info) =
4930 multibuffer.update(cx, |multibuffer, cx| {
4931 multibuffer.set_excerpts_for_path(
4932 PathKey::sorted(0),
4933 buffer_1.clone(),
4934 [Point::new(0, 0)..Point::new(1, 3)],
4935 0,
4936 cx,
4937 );
4938
4939 multibuffer.set_excerpts_for_path(
4940 PathKey::sorted(1),
4941 buffer_2.clone(),
4942 [Point::new(0, 0)..Point::new(1, 3)],
4943 0,
4944 cx,
4945 );
4946
4947 multibuffer.set_excerpts_for_path(
4948 PathKey::sorted(2),
4949 buffer_3.clone(),
4950 [Point::new(0, 0)..Point::new(0, 3)],
4951 0,
4952 cx,
4953 );
4954
4955 let snapshot = multibuffer.snapshot(cx);
4956 let mut infos = snapshot.excerpts().map(|(_, info)| info);
4957 (
4958 infos.next().unwrap(),
4959 infos.next().unwrap(),
4960 infos.next().unwrap(),
4961 )
4962 });
4963
4964 let snapshot = multibuffer.read(cx).snapshot(cx);
4965
4966 assert_eq!(snapshot.text(), "aa0\naa1\nbb0\nbb1\ncc0");
4967
4968 //// Test `excerpts_for_range`
4969
4970 let p00 = snapshot.point_to_offset(Point::new(0, 0));
4971 let p10 = snapshot.point_to_offset(Point::new(1, 0));
4972 let p20 = snapshot.point_to_offset(Point::new(2, 0));
4973 let p23 = snapshot.point_to_offset(Point::new(2, 3));
4974 let p13 = snapshot.point_to_offset(Point::new(1, 3));
4975 let p40 = snapshot.point_to_offset(Point::new(4, 0));
4976 let p43 = snapshot.point_to_offset(Point::new(4, 3));
4977
4978 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p00).collect();
4979 assert_eq!(excerpts.len(), 1);
4980 assert_eq!(excerpts[0].info(), excerpt_1_info);
4981
4982 // Cursor at very end of excerpt 3
4983 let excerpts: Vec<_> = snapshot.excerpts_for_range(p43..p43).collect();
4984 assert_eq!(excerpts.len(), 1);
4985 assert_eq!(excerpts[0].info(), excerpt_3_info);
4986
4987 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p23).collect();
4988 assert_eq!(excerpts.len(), 2);
4989 assert_eq!(excerpts[0].info(), excerpt_1_info);
4990 assert_eq!(excerpts[1].info(), excerpt_2_info);
4991
4992 // This range represent an selection with end-point just inside excerpt_2
4993 // Today we only expand the first excerpt, but another interpretation that
4994 // we could consider is expanding both here
4995 let excerpts: Vec<_> = snapshot.excerpts_for_range(p10..p20).collect();
4996 assert_eq!(excerpts.len(), 1);
4997 assert_eq!(excerpts[0].info(), excerpt_1_info);
4998
4999 //// Test that `excerpts_for_range` and `excerpt_containing` agree for all single offsets (cursor positions)
5000 for offset in 0..=snapshot.len().0 {
5001 let offset = MultiBufferOffset(offset);
5002 let excerpts_for_range: Vec<_> = snapshot.excerpts_for_range(offset..offset).collect();
5003 assert_eq!(
5004 excerpts_for_range.len(),
5005 1,
5006 "Expected exactly one excerpt for offset {offset}",
5007 );
5008
5009 let excerpt_containing = snapshot.excerpt_containing(offset..offset);
5010 assert!(
5011 excerpt_containing.is_some(),
5012 "Expected excerpt_containing to find excerpt for offset {offset}",
5013 );
5014
5015 assert_eq!(
5016 excerpts_for_range[0].info(),
5017 excerpt_containing.unwrap().excerpt.info(),
5018 "excerpts_for_range and excerpt_containing should agree for offset {offset}",
5019 );
5020 }
5021
5022 //// Test `excerpt_containing` behavior with ranges:
5023
5024 // Ranges intersecting a single-excerpt
5025 let containing = snapshot.excerpt_containing(p00..p13);
5026 assert!(containing.is_some());
5027 assert_eq!(containing.unwrap().excerpt.info(), excerpt_1_info);
5028
5029 // Ranges intersecting multiple excerpts (should return None)
5030 let containing = snapshot.excerpt_containing(p20..p40);
5031 assert!(
5032 containing.is_none(),
5033 "excerpt_containing should return None for ranges spanning multiple excerpts"
5034 );
5035}
5036
5037#[gpui::test]
5038fn test_range_to_buffer_ranges(cx: &mut App) {
5039 let buffer_1 = cx.new(|cx| Buffer::local("aaa\nbbb", cx));
5040 let buffer_2 = cx.new(|cx| Buffer::local("ccc", cx));
5041
5042 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5043 multibuffer.update(cx, |multibuffer, cx| {
5044 multibuffer.set_excerpts_for_path(
5045 PathKey::sorted(0),
5046 buffer_1.clone(),
5047 [Point::new(0, 0)..Point::new(1, 3)],
5048 0,
5049 cx,
5050 );
5051
5052 multibuffer.set_excerpts_for_path(
5053 PathKey::sorted(1),
5054 buffer_2.clone(),
5055 [Point::new(0, 0)..Point::new(0, 3)],
5056 0,
5057 cx,
5058 );
5059 });
5060
5061 let snapshot = multibuffer.read(cx).snapshot(cx);
5062 assert_eq!(snapshot.text(), "aaa\nbbb\nccc");
5063
5064 let excerpt_2_start = Point::new(2, 0);
5065
5066 let ranges_half_open = snapshot.range_to_buffer_ranges(Point::zero()..excerpt_2_start);
5067 assert_eq!(
5068 ranges_half_open.len(),
5069 1,
5070 "Half-open range ending at excerpt start should EXCLUDE that excerpt"
5071 );
5072 assert_eq!(ranges_half_open[0].1, BufferOffset(0)..BufferOffset(7));
5073 assert_eq!(
5074 ranges_half_open[0].0.remote_id(),
5075 buffer_1.read(cx).remote_id()
5076 );
5077
5078 let buffer_empty = cx.new(|cx| Buffer::local("", cx));
5079 let multibuffer_trailing_empty = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5080 let (te_excerpt_1_info, te_excerpt_2_info) =
5081 multibuffer_trailing_empty.update(cx, |multibuffer, cx| {
5082 multibuffer.set_excerpts_for_path(
5083 PathKey::sorted(0),
5084 buffer_1.clone(),
5085 [Point::new(0, 0)..Point::new(1, 3)],
5086 0,
5087 cx,
5088 );
5089
5090 multibuffer.set_excerpts_for_path(
5091 PathKey::sorted(1),
5092 buffer_empty.clone(),
5093 [Point::new(0, 0)..Point::new(0, 0)],
5094 0,
5095 cx,
5096 );
5097
5098 let snapshot = multibuffer.snapshot(cx);
5099 let mut infos = snapshot.excerpts().map(|(_, info)| info);
5100 (infos.next().unwrap(), infos.next().unwrap())
5101 });
5102
5103 let snapshot_trailing = multibuffer_trailing_empty.read(cx).snapshot(cx);
5104 assert_eq!(snapshot_trailing.text(), "aaa\nbbb\n");
5105
5106 let max_point = snapshot_trailing.max_point();
5107
5108 let ranges_half_open_max =
5109 snapshot_trailing.range_to_buffer_ranges_with_context(Point::zero()..max_point);
5110 assert_eq!(
5111 ranges_half_open_max.len(),
5112 2,
5113 "Should include trailing empty excerpts"
5114 );
5115 assert_eq!(ranges_half_open_max[0].2, te_excerpt_1_info.range);
5116}
5117
5118#[gpui::test]
5119fn test_cannot_seek_backward_after_excerpt_replacement(cx: &mut TestAppContext) {
5120 let buffer_b_text: String = (0..50).map(|i| format!("line_b {i}\n")).collect();
5121 let buffer_b = cx.new(|cx| Buffer::local(buffer_b_text, cx));
5122
5123 let buffer_c_text: String = (0..10).map(|i| format!("line_c {i}\n")).collect();
5124 let buffer_c = cx.new(|cx| Buffer::local(buffer_c_text, cx));
5125
5126 let buffer_d_text: String = (0..10).map(|i| format!("line_d {i}\n")).collect();
5127 let buffer_d = cx.new(|cx| Buffer::local(buffer_d_text, cx));
5128
5129 let path_b = PathKey::with_sort_prefix(0, rel_path("bbb.rs").into_arc());
5130 let path_c = PathKey::with_sort_prefix(0, rel_path("ddd.rs").into_arc());
5131 let path_d = PathKey::with_sort_prefix(0, rel_path("ccc.rs").into_arc());
5132
5133 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5134
5135 multibuffer.update(cx, |multibuffer, cx| {
5136 multibuffer.set_excerpts_for_path(
5137 path_b.clone(),
5138 buffer_b.clone(),
5139 vec![
5140 Point::row_range(0..3),
5141 Point::row_range(15..18),
5142 Point::row_range(30..33),
5143 ],
5144 0,
5145 cx,
5146 );
5147 });
5148
5149 multibuffer.update(cx, |multibuffer, cx| {
5150 multibuffer.set_excerpts_for_path(
5151 path_c.clone(),
5152 buffer_c.clone(),
5153 vec![Point::row_range(0..3)],
5154 0,
5155 cx,
5156 );
5157 });
5158
5159 let (anchor_in_e_b2, anchor_in_e_b3) = multibuffer.read_with(cx, |multibuffer, cx| {
5160 let snapshot = multibuffer.snapshot(cx);
5161 let excerpt_infos: Vec<ExcerptInfo> = snapshot.excerpts().map(|(_, info)| info).collect();
5162 assert_eq!(excerpt_infos.len(), 4, "expected 4 excerpts (3×B + 1×C)");
5163
5164 let e_b2_info = excerpt_infos[1].clone();
5165 let e_b3_info = excerpt_infos[2].clone();
5166
5167 let anchor_b2 = Anchor::in_buffer(e_b2_info.path_key_index, e_b2_info.range.start);
5168 let anchor_b3 = Anchor::in_buffer(e_b3_info.path_key_index, e_b3_info.range.start);
5169 (anchor_b2, anchor_b3)
5170 });
5171
5172 multibuffer.update(cx, |multibuffer, cx| {
5173 multibuffer.set_excerpts_for_path(
5174 path_b.clone(),
5175 buffer_b.clone(),
5176 vec![Point::row_range(0..3), Point::row_range(28..36)],
5177 0,
5178 cx,
5179 );
5180 });
5181
5182 multibuffer.update(cx, |multibuffer, cx| {
5183 multibuffer.set_excerpts_for_path(
5184 path_d.clone(),
5185 buffer_d.clone(),
5186 vec![Point::row_range(0..3)],
5187 0,
5188 cx,
5189 );
5190 });
5191
5192 multibuffer.read_with(cx, |multibuffer, cx| {
5193 let snapshot = multibuffer.snapshot(cx);
5194 snapshot.summaries_for_anchors::<Point, _>(&[anchor_in_e_b2, anchor_in_e_b3]);
5195 });
5196}