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 excerpts_by_path: HashMap<PathKeyIndex, Vec<ExcerptInfo>> = HashMap::default();
2308 for excerpt in excerpts {
2309 excerpts_by_path
2310 .entry(excerpt.path_key_index)
2311 .or_default()
2312 .push(excerpt.clone())
2313 }
2314
2315 for (path_key_index, excerpts_to_expand) in excerpts_by_path {
2316 let mut buffer = None;
2317 let mut buffer_snapshot = None;
2318 let mut path = None;
2319 let mut new_ranges = self
2320 .excerpts
2321 .iter()
2322 .filter(|excerpt| excerpt.path_key_index == path_key_index)
2323 .map(|excerpt| {
2324 let snapshot = excerpt.buffer.read(cx).snapshot();
2325 let mut range = excerpt.range.to_point(&snapshot);
2326 if excerpts_to_expand
2327 .iter()
2328 .any(|info| excerpt.range.contains_anchor(info.range.start, &snapshot))
2329 {
2330 range.start = Point::new(range.start.row.saturating_sub(line_count), 0);
2331 range.end = snapshot
2332 .clip_point(Point::new(range.end.row + line_count, 0), Bias::Left);
2333 range.end.column = snapshot.line_len(range.end.row);
2334 }
2335 buffer = Some(excerpt.buffer.clone());
2336 buffer_snapshot = Some(snapshot);
2337 path = Some(excerpt.path_key.clone());
2338 ExcerptRange::new(range)
2339 })
2340 .collect::<Vec<_>>();
2341
2342 new_ranges.sort_by(|l, r| l.context.start.cmp(&r.context.start));
2343
2344 self.set_excerpts(
2345 path.unwrap(),
2346 path_key_index,
2347 buffer.unwrap(),
2348 &buffer_snapshot.unwrap(),
2349 new_ranges,
2350 );
2351 }
2352 }
2353
2354 fn set_excerpts(
2355 &mut self,
2356 path_key: PathKey,
2357 path_key_index: PathKeyIndex,
2358 buffer: Entity<Buffer>,
2359 buffer_snapshot: &BufferSnapshot,
2360 ranges: Vec<ExcerptRange<Point>>,
2361 ) {
2362 self.excerpts.retain(|excerpt| {
2363 excerpt.path_key != path_key && excerpt.buffer.entity_id() != buffer.entity_id()
2364 });
2365
2366 let ranges = MultiBuffer::merge_excerpt_ranges(&ranges);
2367
2368 let (Ok(ix) | Err(ix)) = self
2369 .excerpts
2370 .binary_search_by(|probe| probe.path_key.cmp(&path_key));
2371 self.excerpts.splice(
2372 ix..ix,
2373 ranges.into_iter().map(|range| ReferenceExcerpt {
2374 path_key: path_key.clone(),
2375 path_key_index,
2376 buffer: buffer.clone(),
2377 range: buffer_snapshot.anchor_before(range.context.start)
2378 ..buffer_snapshot.anchor_after(range.context.end),
2379 }),
2380 );
2381 }
2382
2383 fn expand_diff_hunks(&mut self, path_key: PathKey, range: Range<text::Anchor>, cx: &App) {
2384 let excerpt = self
2385 .excerpts
2386 .iter_mut()
2387 .find(|e| {
2388 e.path_key == path_key
2389 && e.range
2390 .start
2391 .cmp(&range.start, &e.buffer.read(cx).snapshot())
2392 .is_le()
2393 })
2394 .unwrap();
2395 let buffer = excerpt.buffer.read(cx).snapshot();
2396 let buffer_id = buffer.remote_id();
2397
2398 // Skip inverted excerpts - hunks are always expanded
2399 if self.inverted_diffs.contains_key(&buffer_id) {
2400 return;
2401 }
2402
2403 let Some(diff) = self.diffs.get(&buffer_id) else {
2404 return;
2405 };
2406 let excerpt_range = excerpt.range.to_offset(&buffer);
2407 let expanded_diff_hunks = self
2408 .expanded_diff_hunks_by_buffer
2409 .entry(buffer_id)
2410 .or_default();
2411 for hunk in diff
2412 .read(cx)
2413 .snapshot(cx)
2414 .hunks_intersecting_range(range, &buffer)
2415 {
2416 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2417 if hunk_range.start < excerpt_range.start || hunk_range.start > excerpt_range.end {
2418 continue;
2419 }
2420 if let Err(ix) = expanded_diff_hunks
2421 .binary_search_by(|anchor| anchor.cmp(&hunk.buffer_range.start, &buffer))
2422 {
2423 log::info!(
2424 "expanding diff hunk {:?}. excerpt range:{:?}",
2425 hunk_range,
2426 excerpt_range
2427 );
2428 expanded_diff_hunks.insert(ix, hunk.buffer_range.start);
2429 } else {
2430 log::trace!("hunk {hunk_range:?} already expanded in excerpt");
2431 }
2432 }
2433 }
2434
2435 fn expected_content(&self, cx: &App) -> (String, Vec<RowInfo>, HashSet<MultiBufferRow>) {
2436 let mut text = String::new();
2437 let mut regions = Vec::<ReferenceRegion>::new();
2438 let mut excerpt_boundary_rows = HashSet::default();
2439 for excerpt in &self.excerpts {
2440 excerpt_boundary_rows.insert(MultiBufferRow(text.matches('\n').count() as u32));
2441 let buffer = excerpt.buffer.read(cx);
2442 let buffer_id = buffer.remote_id();
2443 let buffer_range = excerpt.range.to_offset(buffer);
2444
2445 if let Some((diff, main_buffer)) = self.inverted_diffs.get(&buffer_id) {
2446 let diff_snapshot = diff.read(cx).snapshot(cx);
2447 let main_buffer_snapshot = main_buffer.read(cx).snapshot();
2448
2449 let mut offset = buffer_range.start;
2450 for hunk in diff_snapshot.hunks_intersecting_base_text_range(
2451 buffer_range.clone(),
2452 &main_buffer_snapshot.text,
2453 ) {
2454 let mut hunk_base_range = hunk.diff_base_byte_range.clone();
2455
2456 hunk_base_range.end = hunk_base_range.end.min(buffer_range.end);
2457 if hunk_base_range.start > buffer_range.end
2458 || hunk_base_range.start < buffer_range.start
2459 {
2460 continue;
2461 }
2462
2463 // Add the text before the hunk
2464 if hunk_base_range.start >= offset {
2465 let len = text.len();
2466 text.extend(buffer.text_for_range(offset..hunk_base_range.start));
2467 if text.len() > len {
2468 regions.push(ReferenceRegion {
2469 buffer_id: Some(buffer_id),
2470 range: len..text.len(),
2471 buffer_range: Some(
2472 (offset..hunk_base_range.start).to_point(&buffer),
2473 ),
2474 status: None,
2475 excerpt_info: Some(excerpt.info(cx)),
2476 });
2477 }
2478 }
2479
2480 // Add the "deleted" region (base text that's not in main)
2481 if !hunk_base_range.is_empty() {
2482 let len = text.len();
2483 text.extend(buffer.text_for_range(hunk_base_range.clone()));
2484 regions.push(ReferenceRegion {
2485 buffer_id: Some(buffer_id),
2486 range: len..text.len(),
2487 buffer_range: Some(hunk_base_range.to_point(&buffer)),
2488 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2489 excerpt_info: Some(excerpt.info(cx)),
2490 });
2491 }
2492
2493 offset = hunk_base_range.end;
2494 }
2495
2496 // Add remaining buffer text
2497 let len = text.len();
2498 text.extend(buffer.text_for_range(offset..buffer_range.end));
2499 text.push('\n');
2500 regions.push(ReferenceRegion {
2501 buffer_id: Some(buffer_id),
2502 range: len..text.len(),
2503 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2504 status: None,
2505 excerpt_info: Some(excerpt.info(cx)),
2506 });
2507 } else {
2508 let diff = self.diffs.get(&buffer_id).unwrap().read(cx).snapshot(cx);
2509 let base_buffer = diff.base_text();
2510
2511 let mut offset = buffer_range.start;
2512 let hunks = diff
2513 .hunks_intersecting_range(excerpt.range.clone(), buffer)
2514 .peekable();
2515
2516 for hunk in hunks {
2517 // Ignore hunks that are outside the excerpt range.
2518 let mut hunk_range = hunk.buffer_range.to_offset(buffer);
2519
2520 hunk_range.end = hunk_range.end.min(buffer_range.end);
2521 if hunk_range.start > buffer_range.end || hunk_range.start < buffer_range.start
2522 {
2523 log::trace!("skipping hunk outside excerpt range");
2524 continue;
2525 }
2526
2527 if !self
2528 .expanded_diff_hunks_by_buffer
2529 .get(&buffer_id)
2530 .cloned()
2531 .into_iter()
2532 .flatten()
2533 .any(|expanded_anchor| {
2534 expanded_anchor.to_offset(buffer).max(buffer_range.start)
2535 == hunk_range.start.max(buffer_range.start)
2536 })
2537 {
2538 log::trace!("skipping a hunk that's not marked as expanded");
2539 continue;
2540 }
2541
2542 if !hunk.buffer_range.start.is_valid(buffer) {
2543 log::trace!("skipping hunk with deleted start: {:?}", hunk.range);
2544 continue;
2545 }
2546
2547 if hunk_range.start >= offset {
2548 // Add the buffer text before the hunk
2549 let len = text.len();
2550 text.extend(buffer.text_for_range(offset..hunk_range.start));
2551 if text.len() > len {
2552 regions.push(ReferenceRegion {
2553 buffer_id: Some(buffer_id),
2554 range: len..text.len(),
2555 buffer_range: Some((offset..hunk_range.start).to_point(&buffer)),
2556 status: None,
2557 excerpt_info: Some(excerpt.info(cx)),
2558 });
2559 }
2560
2561 // Add the deleted text for the hunk.
2562 if !hunk.diff_base_byte_range.is_empty() {
2563 let mut base_text = base_buffer
2564 .text_for_range(hunk.diff_base_byte_range.clone())
2565 .collect::<String>();
2566 if !base_text.ends_with('\n') {
2567 base_text.push('\n');
2568 }
2569 let len = text.len();
2570 text.push_str(&base_text);
2571 regions.push(ReferenceRegion {
2572 buffer_id: Some(base_buffer.remote_id()),
2573 range: len..text.len(),
2574 buffer_range: Some(
2575 hunk.diff_base_byte_range.to_point(&base_buffer),
2576 ),
2577 status: Some(DiffHunkStatus::deleted(hunk.secondary_status)),
2578 excerpt_info: Some(excerpt.info(cx)),
2579 });
2580 }
2581
2582 offset = hunk_range.start;
2583 }
2584
2585 // Add the inserted text for the hunk.
2586 if hunk_range.end > offset {
2587 let len = text.len();
2588 text.extend(buffer.text_for_range(offset..hunk_range.end));
2589 let range = len..text.len();
2590 let region = ReferenceRegion {
2591 buffer_id: Some(buffer_id),
2592 range,
2593 buffer_range: Some((offset..hunk_range.end).to_point(&buffer)),
2594 status: Some(DiffHunkStatus::added(hunk.secondary_status)),
2595 excerpt_info: Some(excerpt.info(cx)),
2596 };
2597 offset = hunk_range.end;
2598 regions.push(region);
2599 }
2600 }
2601
2602 // Add the buffer text for the rest of the excerpt.
2603 let len = text.len();
2604 text.extend(buffer.text_for_range(offset..buffer_range.end));
2605 text.push('\n');
2606 regions.push(ReferenceRegion {
2607 buffer_id: Some(buffer_id),
2608 range: len..text.len(),
2609 buffer_range: Some((offset..buffer_range.end).to_point(&buffer)),
2610 status: None,
2611 excerpt_info: Some(excerpt.info(cx)),
2612 });
2613 }
2614 }
2615
2616 // Remove final trailing newline.
2617 if self.excerpts.is_empty() {
2618 regions.push(ReferenceRegion {
2619 buffer_id: None,
2620 range: 0..1,
2621 buffer_range: Some(Point::new(0, 0)..Point::new(0, 1)),
2622 status: None,
2623 excerpt_info: None,
2624 });
2625 } else {
2626 text.pop();
2627 }
2628
2629 // Retrieve the row info using the region that contains
2630 // the start of each multi-buffer line.
2631 let mut ix = 0;
2632 let row_infos = text
2633 .split('\n')
2634 .map(|line| {
2635 let row_info = regions
2636 .iter()
2637 .position(|region| region.range.contains(&ix))
2638 .map_or(RowInfo::default(), |region_ix| {
2639 let region = regions[region_ix].clone();
2640 let buffer_row = region.buffer_range.as_ref().map(|buffer_range| {
2641 buffer_range.start.row
2642 + text[region.range.start..ix].matches('\n').count() as u32
2643 });
2644 let main_buffer = self
2645 .excerpts
2646 .iter()
2647 .find(|e| e.info(cx) == region.excerpt_info.clone().unwrap())
2648 .map(|e| e.buffer.clone());
2649 let is_excerpt_start = region_ix == 0
2650 || ®ions[region_ix - 1].excerpt_info != ®ion.excerpt_info
2651 || regions[region_ix - 1].range.is_empty();
2652 let mut is_excerpt_end = region_ix == regions.len() - 1
2653 || ®ions[region_ix + 1].excerpt_info != ®ion.excerpt_info;
2654 let is_start = !text[region.range.start..ix].contains('\n');
2655 let mut is_end = if region.range.end > text.len() {
2656 !text[ix..].contains('\n')
2657 } else {
2658 text[ix..region.range.end.min(text.len())]
2659 .matches('\n')
2660 .count()
2661 == 1
2662 };
2663 if region_ix < regions.len() - 1
2664 && !text[ix..].contains("\n")
2665 && (region.status == Some(DiffHunkStatus::added_none())
2666 || region.status.is_some_and(|s| s.is_deleted()))
2667 && regions[region_ix + 1].excerpt_info == region.excerpt_info
2668 && regions[region_ix + 1].range.start == text.len()
2669 {
2670 is_end = true;
2671 is_excerpt_end = true;
2672 }
2673 let multibuffer_row =
2674 MultiBufferRow(text[..ix].matches('\n').count() as u32);
2675 let mut expand_direction = None;
2676 if let Some(buffer) = &main_buffer {
2677 let buffer_row = buffer_row.unwrap();
2678 let needs_expand_up = is_excerpt_start && is_start && buffer_row > 0;
2679 let needs_expand_down = is_excerpt_end
2680 && is_end
2681 && buffer.read(cx).max_point().row > buffer_row;
2682 expand_direction = if needs_expand_up && needs_expand_down {
2683 Some(ExpandExcerptDirection::UpAndDown)
2684 } else if needs_expand_up {
2685 Some(ExpandExcerptDirection::Up)
2686 } else if needs_expand_down {
2687 Some(ExpandExcerptDirection::Down)
2688 } else {
2689 None
2690 };
2691 }
2692 RowInfo {
2693 buffer_id: region.buffer_id,
2694 diff_status: region.status,
2695 buffer_row,
2696 wrapped_buffer_row: None,
2697
2698 multibuffer_row: Some(multibuffer_row),
2699 expand_info: expand_direction.zip(region.excerpt_info.clone()).map(
2700 |(direction, excerpt_info)| ExpandInfo {
2701 direction,
2702 excerpt_range: excerpt_info.range,
2703 },
2704 ),
2705 }
2706 });
2707 ix += line.len() + 1;
2708 row_info
2709 })
2710 .collect();
2711
2712 (text, row_infos, excerpt_boundary_rows)
2713 }
2714
2715 fn diffs_updated(&mut self, cx: &App) {
2716 for excerpt in &mut self.excerpts {
2717 let buffer = excerpt.buffer.read(cx).snapshot();
2718 let buffer_id = buffer.remote_id();
2719
2720 // Skip inverted diff excerpts - hunks are always expanded
2721 if self.inverted_diffs.contains_key(&buffer_id) {
2722 continue;
2723 }
2724
2725 let excerpt_range = excerpt.range.to_offset(&buffer);
2726 let Some(diff) = self.diffs.get(&buffer_id) else {
2727 continue;
2728 };
2729 let diff = diff.read(cx).snapshot(cx);
2730 let mut hunks = diff.hunks_in_row_range(0..u32::MAX, &buffer).peekable();
2731 self.expanded_diff_hunks_by_buffer
2732 .entry(buffer_id)
2733 .or_default()
2734 .retain(|hunk_anchor| {
2735 if !hunk_anchor.is_valid(&buffer) {
2736 return false;
2737 }
2738 while let Some(hunk) = hunks.peek() {
2739 match hunk.buffer_range.start.cmp(hunk_anchor, &buffer) {
2740 cmp::Ordering::Less => {
2741 hunks.next();
2742 }
2743 cmp::Ordering::Equal => {
2744 let hunk_range = hunk.buffer_range.to_offset(&buffer);
2745 return hunk_range.end >= excerpt_range.start
2746 && hunk_range.start <= excerpt_range.end;
2747 }
2748 cmp::Ordering::Greater => break,
2749 }
2750 }
2751 false
2752 });
2753 }
2754 }
2755
2756 fn add_diff(&mut self, diff: Entity<BufferDiff>, cx: &mut App) {
2757 let buffer_id = diff.read(cx).buffer_id;
2758 self.diffs.insert(buffer_id, diff);
2759 }
2760
2761 fn add_inverted_diff(
2762 &mut self,
2763 diff: Entity<BufferDiff>,
2764 main_buffer: Entity<language::Buffer>,
2765 cx: &App,
2766 ) {
2767 let base_text_buffer_id = diff.read(cx).base_text(cx).remote_id();
2768 self.inverted_diffs
2769 .insert(base_text_buffer_id, (diff, main_buffer));
2770 }
2771}
2772
2773#[gpui::test(iterations = 100)]
2774async fn test_random_set_ranges(cx: &mut TestAppContext, mut rng: StdRng) {
2775 let base_text = "a\n".repeat(100);
2776 let buf = cx.update(|cx| cx.new(|cx| Buffer::local(base_text, cx)));
2777 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2778
2779 let operations = env::var("OPERATIONS")
2780 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2781 .unwrap_or(10);
2782
2783 fn row_ranges(ranges: &Vec<Range<Point>>) -> Vec<Range<u32>> {
2784 ranges
2785 .iter()
2786 .map(|range| range.start.row..range.end.row)
2787 .collect()
2788 }
2789
2790 for _ in 0..operations {
2791 let snapshot = buf.update(cx, |buf, _| buf.snapshot());
2792 let num_ranges = rng.random_range(0..=10);
2793 let max_row = snapshot.max_point().row;
2794 let mut ranges = (0..num_ranges)
2795 .map(|_| {
2796 let start = rng.random_range(0..max_row);
2797 let end = rng.random_range(start + 1..max_row + 1);
2798 Point::row_range(start..end)
2799 })
2800 .collect::<Vec<_>>();
2801 ranges.sort_by_key(|range| range.start);
2802 log::info!("Setting ranges: {:?}", row_ranges(&ranges));
2803 let (created, _) = multibuffer.update(cx, |multibuffer, cx| {
2804 multibuffer.set_excerpts_for_path(
2805 PathKey::for_buffer(&buf, cx),
2806 buf.clone(),
2807 ranges.clone(),
2808 2,
2809 cx,
2810 )
2811 });
2812
2813 assert_eq!(created.len(), ranges.len());
2814
2815 let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2816 let mut last_end = None;
2817 let mut seen_ranges = Vec::default();
2818
2819 for (buf, info) in snapshot.excerpts() {
2820 let start = info.range.start.to_point(buf);
2821 let end = info.range.end.to_point(buf);
2822 seen_ranges.push(start..end);
2823
2824 if let Some(last_end) = last_end.take() {
2825 assert!(
2826 start > last_end,
2827 "multibuffer has out-of-order ranges: {:?}; {:?} <= {:?}",
2828 row_ranges(&seen_ranges),
2829 start,
2830 last_end
2831 )
2832 }
2833
2834 ranges.retain(|range| range.start < start || range.end > end);
2835
2836 last_end = Some(end)
2837 }
2838
2839 assert!(
2840 ranges.is_empty(),
2841 "multibuffer {:?} did not include all ranges: {:?}",
2842 row_ranges(&seen_ranges),
2843 row_ranges(&ranges)
2844 );
2845 }
2846}
2847
2848#[gpui::test(iterations = 100)]
2849async fn test_random_multibuffer(cx: &mut TestAppContext, mut rng: StdRng) {
2850 let operations = env::var("OPERATIONS")
2851 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
2852 .unwrap_or(10);
2853 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
2854 let mut buffers: Vec<Entity<Buffer>> = Vec::new();
2855 let mut base_texts: HashMap<BufferId, String> = HashMap::default();
2856 let mut reference = ReferenceMultibuffer::default();
2857 let mut anchors = Vec::new();
2858 let mut old_versions = Vec::new();
2859 let mut needs_diff_calculation = false;
2860 let mut inverted_diff_main_buffers: HashMap<BufferId, Entity<BufferDiff>> = HashMap::default();
2861 for _ in 0..operations {
2862 match rng.random_range(0..100) {
2863 0..=14 if !buffers.is_empty() => {
2864 let buffer = buffers.choose(&mut rng).unwrap();
2865 buffer.update(cx, |buf, cx| {
2866 let edit_count = rng.random_range(1..5);
2867 buf.randomly_edit(&mut rng, edit_count, cx);
2868 log::info!("buffer text:\n{}", buf.text());
2869 needs_diff_calculation = true;
2870 });
2871 cx.update(|cx| reference.diffs_updated(cx));
2872 }
2873 15..=24 if !reference.excerpts.is_empty() => {
2874 multibuffer.update(cx, |multibuffer, cx| {
2875 let snapshot = multibuffer.snapshot(cx);
2876 let infos = snapshot
2877 .excerpts()
2878 .map(|(_, info)| info)
2879 .collect::<Vec<_>>();
2880 let mut excerpts = HashSet::default();
2881 for _ in 0..rng.random_range(0..infos.len()) {
2882 excerpts.extend(infos.choose(&mut rng).cloned());
2883 }
2884
2885 let line_count = rng.random_range(0..5);
2886
2887 let excerpt_ixs = excerpts
2888 .iter()
2889 .map(|info| {
2890 reference
2891 .excerpts
2892 .iter()
2893 .position(|e| e.info(cx) == *info)
2894 .unwrap()
2895 })
2896 .collect::<Vec<_>>();
2897 log::info!("Expanding excerpts {excerpt_ixs:?} by {line_count} lines");
2898 multibuffer.expand_excerpts(
2899 excerpts
2900 .iter()
2901 .map(|info| Anchor::in_buffer(info.path_key_index, info.range.end)),
2902 line_count,
2903 ExpandExcerptDirection::UpAndDown,
2904 cx,
2905 );
2906
2907 reference.expand_excerpts(&excerpts, line_count, cx);
2908 });
2909 }
2910 25..=34 if !reference.excerpts.is_empty() => {
2911 let multibuffer =
2912 multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
2913 let offset = multibuffer.clip_offset(
2914 MultiBufferOffset(rng.random_range(0..=multibuffer.len().0)),
2915 Bias::Left,
2916 );
2917 let bias = if rng.random() {
2918 Bias::Left
2919 } else {
2920 Bias::Right
2921 };
2922 log::info!("Creating anchor at {} with bias {:?}", offset.0, bias);
2923 anchors.push(multibuffer.anchor_at(offset, bias));
2924 anchors.sort_by(|a, b| a.cmp(b, &multibuffer));
2925 }
2926 35..=45 if !reference.excerpts.is_empty() => {
2927 multibuffer.update(cx, |multibuffer, cx| {
2928 let snapshot = multibuffer.snapshot(cx);
2929 let excerpt_ix = rng.random_range(0..reference.excerpts.len());
2930 let excerpt = &reference.excerpts[excerpt_ix];
2931
2932 // Skip inverted excerpts - hunks can't be collapsed
2933 let buffer_id = excerpt.buffer.read(cx).remote_id();
2934 if reference.inverted_diffs.contains_key(&buffer_id) {
2935 return;
2936 }
2937
2938 let start = excerpt.range.start;
2939 let end = excerpt.range.end;
2940 let range = snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, start).unwrap()
2941 ..snapshot.anchor_in_buffer(excerpt.info(cx).buffer_id, end).unwrap();
2942
2943 log::info!(
2944 "expanding diff hunks in range {:?} (excerpt index {excerpt_ix:?}, buffer id {:?})",
2945 range.to_offset(&snapshot),
2946 buffer_id,
2947 );
2948 reference.expand_diff_hunks(excerpt.path_key.clone(), start..end, cx);
2949 multibuffer.expand_diff_hunks(vec![range], cx);
2950 });
2951 }
2952 46..=75 if needs_diff_calculation => {
2953 multibuffer.update(cx, |multibuffer, cx| {
2954 for buffer in multibuffer.all_buffers() {
2955 let snapshot = buffer.read(cx).snapshot();
2956 let buffer_id = snapshot.remote_id();
2957
2958 if let Some(diff) = multibuffer.diff_for(buffer_id) {
2959 diff.update(cx, |diff, cx| {
2960 log::info!("recalculating diff for buffer {:?}", buffer_id,);
2961 diff.recalculate_diff_sync(&snapshot.text, cx);
2962 });
2963 }
2964
2965 if let Some(inverted_diff) = inverted_diff_main_buffers.get(&buffer_id) {
2966 inverted_diff.update(cx, |diff, cx| {
2967 log::info!(
2968 "recalculating inverted diff for main buffer {:?}",
2969 buffer_id,
2970 );
2971 diff.recalculate_diff_sync(&snapshot.text, cx);
2972 });
2973 }
2974 }
2975 reference.diffs_updated(cx);
2976 needs_diff_calculation = false;
2977 });
2978 }
2979 _ => {
2980 // Decide if we're creating a new buffer or reusing an existing one
2981 let create_new_buffer = buffers.is_empty() || rng.random_bool(0.4);
2982
2983 let (excerpt_buffer, diff, inverted_main_buffer) = if create_new_buffer {
2984 let create_inverted = rng.random_bool(0.3);
2985
2986 if create_inverted {
2987 let mut main_buffer_text = util::RandomCharIter::new(&mut rng)
2988 .take(256)
2989 .collect::<String>();
2990 let main_buffer = cx.new(|cx| Buffer::local(main_buffer_text.clone(), cx));
2991 text::LineEnding::normalize(&mut main_buffer_text);
2992 let main_buffer_id =
2993 main_buffer.read_with(cx, |buffer, _| buffer.remote_id());
2994 base_texts.insert(main_buffer_id, main_buffer_text.clone());
2995 buffers.push(main_buffer.clone());
2996
2997 let diff = cx.new(|cx| {
2998 BufferDiff::new_with_base_text(
2999 &main_buffer_text,
3000 &main_buffer.read(cx).text_snapshot(),
3001 cx,
3002 )
3003 });
3004
3005 let base_text_buffer =
3006 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3007
3008 // Track for recalculation when main buffer is edited
3009 inverted_diff_main_buffers.insert(main_buffer_id, diff.clone());
3010
3011 (base_text_buffer, diff, Some(main_buffer))
3012 } else {
3013 let mut base_text = util::RandomCharIter::new(&mut rng)
3014 .take(256)
3015 .collect::<String>();
3016
3017 let buffer_handle = cx.new(|cx| Buffer::local(base_text.clone(), cx));
3018 text::LineEnding::normalize(&mut base_text);
3019 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3020 base_texts.insert(buffer_id, base_text.clone());
3021 buffers.push(buffer_handle.clone());
3022
3023 let diff = cx.new(|cx| {
3024 BufferDiff::new_with_base_text(
3025 &base_text,
3026 &buffer_handle.read(cx).text_snapshot(),
3027 cx,
3028 )
3029 });
3030
3031 (buffer_handle, diff, None)
3032 }
3033 } else {
3034 // Reuse an existing buffer
3035 let buffer_handle = buffers.choose(&mut rng).unwrap().clone();
3036 let buffer_id = buffer_handle.read_with(cx, |buffer, _| buffer.remote_id());
3037
3038 if let Some(diff) = inverted_diff_main_buffers.get(&buffer_id) {
3039 let base_text_buffer =
3040 diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3041 (base_text_buffer, diff.clone(), Some(buffer_handle))
3042 } else {
3043 // Get existing diff or create new one for regular buffer
3044 let diff = multibuffer
3045 .read_with(cx, |mb, _| mb.diff_for(buffer_id))
3046 .unwrap_or_else(|| {
3047 let base_text = base_texts.get(&buffer_id).unwrap();
3048 cx.new(|cx| {
3049 BufferDiff::new_with_base_text(
3050 base_text,
3051 &buffer_handle.read(cx).text_snapshot(),
3052 cx,
3053 )
3054 })
3055 });
3056 (buffer_handle, diff, None)
3057 }
3058 };
3059
3060 let excerpt_buffer_snapshot =
3061 excerpt_buffer.read_with(cx, |excerpt_buffer, _| excerpt_buffer.snapshot());
3062 let mut ranges = reference
3063 .excerpts
3064 .iter()
3065 .filter(|excerpt| excerpt.buffer == excerpt_buffer)
3066 .map(|excerpt| excerpt.range.to_point(&excerpt_buffer_snapshot))
3067 .collect::<Vec<_>>();
3068 mutate_excerpt_ranges(&mut rng, &mut ranges, &excerpt_buffer_snapshot, 1);
3069 let ranges = ranges
3070 .iter()
3071 .cloned()
3072 .map(ExcerptRange::new)
3073 .collect::<Vec<_>>();
3074 let path = cx.update(|cx| PathKey::for_buffer(&excerpt_buffer, cx));
3075
3076 let (_, path_key_index, _) = multibuffer.update(cx, |multibuffer, cx| {
3077 multibuffer.set_excerpt_ranges_for_path(
3078 path.clone(),
3079 excerpt_buffer.clone(),
3080 &excerpt_buffer_snapshot,
3081 ranges.clone(),
3082 cx,
3083 )
3084 });
3085
3086 reference.set_excerpts(
3087 path,
3088 path_key_index,
3089 excerpt_buffer.clone(),
3090 &excerpt_buffer_snapshot,
3091 ranges,
3092 );
3093
3094 let excerpt_buffer_id =
3095 excerpt_buffer.read_with(cx, |buffer, _| buffer.remote_id());
3096 multibuffer.update(cx, |multibuffer, cx| {
3097 if multibuffer.diff_for(excerpt_buffer_id).is_none() {
3098 if let Some(main_buffer) = inverted_main_buffer {
3099 reference.add_inverted_diff(diff.clone(), main_buffer.clone(), cx);
3100 multibuffer.add_inverted_diff(diff, main_buffer, cx);
3101 } else {
3102 reference.add_diff(diff.clone(), cx);
3103 multibuffer.add_diff(diff, cx);
3104 }
3105 }
3106 });
3107 }
3108 }
3109
3110 if rng.random_bool(0.3) {
3111 multibuffer.update(cx, |multibuffer, cx| {
3112 old_versions.push((multibuffer.snapshot(cx), multibuffer.subscribe()));
3113 })
3114 }
3115
3116 multibuffer.read_with(cx, |multibuffer, cx| {
3117 check_multibuffer(multibuffer, &reference, &anchors, cx, &mut rng);
3118 });
3119 }
3120 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
3121 for (old_snapshot, subscription) in old_versions {
3122 check_multibuffer_edits(&snapshot, &old_snapshot, subscription);
3123 }
3124}
3125
3126fn mutate_excerpt_ranges(
3127 rng: &mut StdRng,
3128 existing_ranges: &mut Vec<Range<Point>>,
3129 buffer: &BufferSnapshot,
3130 operations: u32,
3131) {
3132 let mut ranges_to_add = Vec::new();
3133
3134 for _ in 0..operations {
3135 // todo!() logging
3136 match rng.random_range(0..5) {
3137 0..=1 if !existing_ranges.is_empty() => {
3138 log::info!("Removing excerpt",);
3139 let index = rng.random_range(0..existing_ranges.len());
3140 existing_ranges.remove(index);
3141 }
3142 _ => {
3143 log::info!("Inserting excerpt",);
3144 let end_row = rng.random_range(0..=buffer.max_point().row);
3145 let start_row = rng.random_range(0..=end_row);
3146 ranges_to_add.push(Point::new(start_row, 0)..Point::new(end_row, 0));
3147 }
3148 }
3149 }
3150
3151 existing_ranges.extend(ranges_to_add);
3152 existing_ranges.sort_by(|l, r| l.start.cmp(&r.start));
3153}
3154
3155fn check_multibuffer(
3156 multibuffer: &MultiBuffer,
3157 reference: &ReferenceMultibuffer,
3158 anchors: &[Anchor],
3159 cx: &App,
3160 rng: &mut StdRng,
3161) {
3162 let snapshot = multibuffer.snapshot(cx);
3163 let actual_text = snapshot.text();
3164 let actual_boundary_rows = snapshot
3165 .excerpt_boundaries_in_range(MultiBufferOffset(0)..)
3166 .map(|b| b.row)
3167 .collect::<HashSet<_>>();
3168 let actual_row_infos = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
3169
3170 let (expected_text, expected_row_infos, expected_boundary_rows) =
3171 reference.expected_content(cx);
3172
3173 let has_diff = actual_row_infos
3174 .iter()
3175 .any(|info| info.diff_status.is_some())
3176 || expected_row_infos
3177 .iter()
3178 .any(|info| info.diff_status.is_some());
3179 let actual_diff = format_diff(
3180 &actual_text,
3181 &actual_row_infos,
3182 &actual_boundary_rows,
3183 Some(has_diff),
3184 );
3185 let expected_diff = format_diff(
3186 &expected_text,
3187 &expected_row_infos,
3188 &expected_boundary_rows,
3189 Some(has_diff),
3190 );
3191
3192 log::info!("Multibuffer content:\n{}", actual_diff);
3193 dbg!(
3194 snapshot
3195 .excerpts()
3196 .map(|(buffer_snapshot, excerpt)| {
3197 (
3198 buffer_snapshot.remote_id(),
3199 excerpt.range.to_point(&buffer_snapshot),
3200 )
3201 })
3202 .collect::<Vec<_>>()
3203 );
3204 dbg!(
3205 reference
3206 .excerpts
3207 .iter()
3208 .cloned()
3209 .map(|excerpt| (
3210 excerpt.path_key,
3211 excerpt.range.to_point(&excerpt.buffer.read(cx).snapshot())
3212 ))
3213 .collect::<Vec<_>>()
3214 );
3215
3216 assert_eq!(
3217 actual_row_infos.len(),
3218 actual_text.split('\n').count(),
3219 "line count: {}",
3220 actual_text.split('\n').count()
3221 );
3222 pretty_assertions::assert_eq!(actual_diff, expected_diff);
3223 pretty_assertions::assert_eq!(actual_text, expected_text);
3224 pretty_assertions::assert_eq!(actual_row_infos, expected_row_infos);
3225
3226 for _ in 0..5 {
3227 let start_row = rng.random_range(0..=expected_row_infos.len());
3228 assert_eq!(
3229 snapshot
3230 .row_infos(MultiBufferRow(start_row as u32))
3231 .collect::<Vec<_>>(),
3232 &expected_row_infos[start_row..],
3233 "buffer_rows({})",
3234 start_row
3235 );
3236 }
3237 // dbg!(&expected_row_infos);
3238
3239 // dbg!(
3240 // snapshot
3241 // .excerpts()
3242 // .map(|(buffer_snapshot, excerpt)| {
3243 // (
3244 // buffer_snapshot.remote_id(),
3245 // excerpt.range.to_point(&buffer_snapshot),
3246 // )
3247 // })
3248 // .collect::<Vec<_>>()
3249 // );
3250 // dbg!(&expected_row_infos);
3251 // dbg!(
3252 // reference
3253 // .excerpts
3254 // .iter()
3255 // .map(|excerpt| { excerpt.range.to_point(&excerpt.buffer.read(cx).snapshot()) })
3256 // .collect::<Vec<_>>()
3257 // );
3258
3259 assert_eq!(
3260 snapshot.widest_line_number(),
3261 expected_row_infos
3262 .into_iter()
3263 .filter_map(|info| {
3264 // For inverted diffs, deleted rows are visible and should be counted.
3265 // Only filter out deleted rows that are NOT from inverted diffs.
3266 let is_inverted_diff = info
3267 .buffer_id
3268 .is_some_and(|id| reference.inverted_diffs.contains_key(&id));
3269 if info.diff_status.is_some_and(|status| status.is_deleted()) && !is_inverted_diff {
3270 None
3271 } else {
3272 info.buffer_row
3273 }
3274 })
3275 .max()
3276 .unwrap()
3277 + 1
3278 );
3279 // let reference_ranges = reference
3280 // .excerpts
3281 // .iter()
3282 // .map(|excerpt| {
3283 // (
3284 // excerpt.info(cx),
3285 // excerpt.range.to_offset(&excerpt.buffer.read(cx).snapshot()),
3286 // )
3287 // })
3288 // .collect::<Vec<_>>();
3289 for i in 0..snapshot.len().0 {
3290 // todo!() this seems not useful
3291 let excerpt = snapshot
3292 .excerpt_containing(MultiBufferOffset(i)..MultiBufferOffset(i))
3293 .unwrap();
3294 let reference_range = reference
3295 .excerpts
3296 .iter()
3297 .find(|reference_excerpt| reference_excerpt.info(cx) == excerpt.excerpt.info())
3298 .map(|excerpt| excerpt.range.to_offset(&excerpt.buffer.read(cx).snapshot()))
3299 .expect("corresponding excerpt should exist in reference multibuffer");
3300 assert_eq!(
3301 excerpt.buffer_range(&snapshot).start.0..excerpt.buffer_range(&snapshot).end.0,
3302 reference_range
3303 );
3304 }
3305
3306 assert_consistent_line_numbers(&snapshot);
3307 assert_position_translation(&snapshot);
3308
3309 for (row, line) in expected_text.split('\n').enumerate() {
3310 assert_eq!(
3311 snapshot.line_len(MultiBufferRow(row as u32)),
3312 line.len() as u32,
3313 "line_len({}).",
3314 row
3315 );
3316 }
3317
3318 let text_rope = Rope::from(expected_text.as_str());
3319 for _ in 0..10 {
3320 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3321 let start_ix = text_rope.clip_offset(rng.random_range(0..=end_ix), Bias::Left);
3322
3323 let text_for_range = snapshot
3324 .text_for_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3325 .collect::<String>();
3326 assert_eq!(
3327 text_for_range,
3328 &expected_text[start_ix..end_ix],
3329 "incorrect text for range {:?}",
3330 start_ix..end_ix
3331 );
3332
3333 let expected_summary =
3334 MBTextSummary::from(TextSummary::from(&expected_text[start_ix..end_ix]));
3335 assert_eq!(
3336 snapshot.text_summary_for_range::<MBTextSummary, _>(
3337 MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix)
3338 ),
3339 expected_summary,
3340 "incorrect summary for range {:?}",
3341 start_ix..end_ix
3342 );
3343 }
3344
3345 // Anchor resolution
3346 let summaries = snapshot.summaries_for_anchors::<MultiBufferOffset, _>(anchors);
3347 assert_eq!(anchors.len(), summaries.len());
3348 for (anchor, resolved_offset) in anchors.iter().zip(summaries) {
3349 assert!(resolved_offset <= snapshot.len());
3350 assert_eq!(
3351 snapshot.summary_for_anchor::<MultiBufferOffset>(anchor),
3352 resolved_offset,
3353 "anchor: {:?}",
3354 anchor
3355 );
3356 }
3357
3358 for _ in 0..10 {
3359 let end_ix = text_rope.clip_offset(rng.random_range(0..=text_rope.len()), Bias::Right);
3360 assert_eq!(
3361 snapshot
3362 .reversed_chars_at(MultiBufferOffset(end_ix))
3363 .collect::<String>(),
3364 expected_text[..end_ix].chars().rev().collect::<String>(),
3365 );
3366 }
3367
3368 for _ in 0..10 {
3369 let end_ix = rng.random_range(0..=text_rope.len());
3370 let end_ix = text_rope.floor_char_boundary(end_ix);
3371 let start_ix = rng.random_range(0..=end_ix);
3372 let start_ix = text_rope.floor_char_boundary(start_ix);
3373 assert_eq!(
3374 snapshot
3375 .bytes_in_range(MultiBufferOffset(start_ix)..MultiBufferOffset(end_ix))
3376 .flatten()
3377 .copied()
3378 .collect::<Vec<_>>(),
3379 expected_text.as_bytes()[start_ix..end_ix].to_vec(),
3380 "bytes_in_range({:?})",
3381 start_ix..end_ix,
3382 );
3383 }
3384}
3385
3386fn check_multibuffer_edits(
3387 snapshot: &MultiBufferSnapshot,
3388 old_snapshot: &MultiBufferSnapshot,
3389 subscription: Subscription<MultiBufferOffset>,
3390) {
3391 let edits = subscription.consume().into_inner();
3392
3393 log::info!(
3394 "applying subscription edits to old text: {:?}: {:#?}",
3395 old_snapshot.text(),
3396 edits,
3397 );
3398
3399 let mut text = old_snapshot.text();
3400 for edit in edits {
3401 let new_text: String = snapshot
3402 .text_for_range(edit.new.start..edit.new.end)
3403 .collect();
3404 text.replace_range(
3405 (edit.new.start.0..edit.new.start.0 + (edit.old.end.0 - edit.old.start.0)).clone(),
3406 &new_text,
3407 );
3408 pretty_assertions::assert_eq!(
3409 &text[0..edit.new.end.0],
3410 snapshot
3411 .text_for_range(MultiBufferOffset(0)..edit.new.end)
3412 .collect::<String>()
3413 );
3414 }
3415 pretty_assertions::assert_eq!(text, snapshot.text());
3416}
3417
3418#[gpui::test]
3419fn test_history(cx: &mut App) {
3420 let test_settings = SettingsStore::test(cx);
3421 cx.set_global(test_settings);
3422
3423 let group_interval: Duration = Duration::from_millis(1);
3424 let buffer_1 = cx.new(|cx| {
3425 let mut buf = Buffer::local("1234", cx);
3426 buf.set_group_interval(group_interval);
3427 buf
3428 });
3429 let buffer_2 = cx.new(|cx| {
3430 let mut buf = Buffer::local("5678", cx);
3431 buf.set_group_interval(group_interval);
3432 buf
3433 });
3434 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
3435 multibuffer.update(cx, |this, _| {
3436 this.set_group_interval(group_interval);
3437 });
3438 multibuffer.update(cx, |multibuffer, cx| {
3439 multibuffer.set_excerpts_for_path(
3440 PathKey::sorted(0),
3441 buffer_1.clone(),
3442 [Point::zero()..buffer_1.read(cx).max_point()],
3443 0,
3444 cx,
3445 );
3446 multibuffer.set_excerpts_for_path(
3447 PathKey::sorted(1),
3448 buffer_2.clone(),
3449 [Point::zero()..buffer_2.read(cx).max_point()],
3450 0,
3451 cx,
3452 );
3453 });
3454
3455 let mut now = Instant::now();
3456
3457 multibuffer.update(cx, |multibuffer, cx| {
3458 let transaction_1 = multibuffer.start_transaction_at(now, cx).unwrap();
3459 multibuffer.edit(
3460 [
3461 (Point::new(0, 0)..Point::new(0, 0), "A"),
3462 (Point::new(1, 0)..Point::new(1, 0), "A"),
3463 ],
3464 None,
3465 cx,
3466 );
3467 multibuffer.edit(
3468 [
3469 (Point::new(0, 1)..Point::new(0, 1), "B"),
3470 (Point::new(1, 1)..Point::new(1, 1), "B"),
3471 ],
3472 None,
3473 cx,
3474 );
3475 multibuffer.end_transaction_at(now, cx);
3476 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3477
3478 // Verify edited ranges for transaction 1
3479 assert_eq!(
3480 multibuffer.edited_ranges_for_transaction(transaction_1, cx),
3481 &[
3482 MultiBufferOffset(0)..MultiBufferOffset(2),
3483 MultiBufferOffset(7)..MultiBufferOffset(9),
3484 ]
3485 );
3486
3487 // Edit buffer 1 through the multibuffer
3488 now += 2 * group_interval;
3489 multibuffer.start_transaction_at(now, cx);
3490 multibuffer.edit(
3491 [(MultiBufferOffset(2)..MultiBufferOffset(2), "C")],
3492 None,
3493 cx,
3494 );
3495 multibuffer.end_transaction_at(now, cx);
3496 assert_eq!(multibuffer.read(cx).text(), "ABC1234\nAB5678");
3497
3498 // Edit buffer 1 independently
3499 buffer_1.update(cx, |buffer_1, cx| {
3500 buffer_1.start_transaction_at(now);
3501 buffer_1.edit([(3..3, "D")], None, cx);
3502 buffer_1.end_transaction_at(now, cx);
3503
3504 now += 2 * group_interval;
3505 buffer_1.start_transaction_at(now);
3506 buffer_1.edit([(4..4, "E")], None, cx);
3507 buffer_1.end_transaction_at(now, cx);
3508 });
3509 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3510
3511 // An undo in the multibuffer undoes the multibuffer transaction
3512 // and also any individual buffer edits that have occurred since
3513 // that transaction.
3514 multibuffer.undo(cx);
3515 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3516
3517 multibuffer.undo(cx);
3518 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3519
3520 multibuffer.redo(cx);
3521 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3522
3523 multibuffer.redo(cx);
3524 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\nAB5678");
3525
3526 // Undo buffer 2 independently.
3527 buffer_2.update(cx, |buffer_2, cx| buffer_2.undo(cx));
3528 assert_eq!(multibuffer.read(cx).text(), "ABCDE1234\n5678");
3529
3530 // An undo in the multibuffer undoes the components of the
3531 // the last multibuffer transaction that are not already undone.
3532 multibuffer.undo(cx);
3533 assert_eq!(multibuffer.read(cx).text(), "AB1234\n5678");
3534
3535 multibuffer.undo(cx);
3536 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3537
3538 multibuffer.redo(cx);
3539 assert_eq!(multibuffer.read(cx).text(), "AB1234\nAB5678");
3540
3541 buffer_1.update(cx, |buffer_1, cx| buffer_1.redo(cx));
3542 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3543
3544 // Redo stack gets cleared after an edit.
3545 now += 2 * group_interval;
3546 multibuffer.start_transaction_at(now, cx);
3547 multibuffer.edit(
3548 [(MultiBufferOffset(0)..MultiBufferOffset(0), "X")],
3549 None,
3550 cx,
3551 );
3552 multibuffer.end_transaction_at(now, cx);
3553 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3554 multibuffer.redo(cx);
3555 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3556 multibuffer.undo(cx);
3557 assert_eq!(multibuffer.read(cx).text(), "ABCD1234\nAB5678");
3558 multibuffer.undo(cx);
3559 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3560
3561 // Transactions can be grouped manually.
3562 multibuffer.redo(cx);
3563 multibuffer.redo(cx);
3564 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3565 multibuffer.group_until_transaction(transaction_1, cx);
3566 multibuffer.undo(cx);
3567 assert_eq!(multibuffer.read(cx).text(), "1234\n5678");
3568 multibuffer.redo(cx);
3569 assert_eq!(multibuffer.read(cx).text(), "XABCD1234\nAB5678");
3570 });
3571}
3572
3573#[gpui::test]
3574async fn test_enclosing_indent(cx: &mut TestAppContext) {
3575 async fn enclosing_indent(
3576 text: &str,
3577 buffer_row: u32,
3578 cx: &mut TestAppContext,
3579 ) -> Option<(Range<u32>, LineIndent)> {
3580 let buffer = cx.update(|cx| MultiBuffer::build_simple(text, cx));
3581 let snapshot = cx.read(|cx| buffer.read(cx).snapshot(cx));
3582 let (range, indent) = snapshot
3583 .enclosing_indent(MultiBufferRow(buffer_row))
3584 .await?;
3585 Some((range.start.0..range.end.0, indent))
3586 }
3587
3588 assert_eq!(
3589 enclosing_indent(
3590 indoc!(
3591 "
3592 fn b() {
3593 if c {
3594 let d = 2;
3595 }
3596 }
3597 "
3598 ),
3599 1,
3600 cx,
3601 )
3602 .await,
3603 Some((
3604 1..2,
3605 LineIndent {
3606 tabs: 0,
3607 spaces: 4,
3608 line_blank: false,
3609 }
3610 ))
3611 );
3612
3613 assert_eq!(
3614 enclosing_indent(
3615 indoc!(
3616 "
3617 fn b() {
3618 if c {
3619 let d = 2;
3620 }
3621 }
3622 "
3623 ),
3624 2,
3625 cx,
3626 )
3627 .await,
3628 Some((
3629 1..2,
3630 LineIndent {
3631 tabs: 0,
3632 spaces: 4,
3633 line_blank: false,
3634 }
3635 ))
3636 );
3637
3638 assert_eq!(
3639 enclosing_indent(
3640 indoc!(
3641 "
3642 fn b() {
3643 if c {
3644 let d = 2;
3645
3646 let e = 5;
3647 }
3648 }
3649 "
3650 ),
3651 3,
3652 cx,
3653 )
3654 .await,
3655 Some((
3656 1..4,
3657 LineIndent {
3658 tabs: 0,
3659 spaces: 4,
3660 line_blank: false,
3661 }
3662 ))
3663 );
3664}
3665
3666#[gpui::test]
3667async fn test_summaries_for_anchors(cx: &mut TestAppContext) {
3668 let base_text_1 = indoc!(
3669 "
3670 bar
3671 "
3672 );
3673 let text_1 = indoc!(
3674 "
3675 BAR
3676 "
3677 );
3678 let base_text_2 = indoc!(
3679 "
3680 foo
3681 "
3682 );
3683 let text_2 = indoc!(
3684 "
3685 FOO
3686 "
3687 );
3688
3689 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3690 let buffer_2 = cx.new(|cx| Buffer::local(text_2, cx));
3691 let diff_1 = cx.new(|cx| {
3692 BufferDiff::new_with_base_text(base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3693 });
3694 let diff_2 = cx.new(|cx| {
3695 BufferDiff::new_with_base_text(base_text_2, &buffer_2.read(cx).text_snapshot(), cx)
3696 });
3697 cx.run_until_parked();
3698
3699 let multibuffer = cx.new(|cx| {
3700 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3701 multibuffer.set_all_diff_hunks_expanded(cx);
3702 multibuffer.set_excerpts_for_path(
3703 PathKey::sorted(0),
3704 buffer_1.clone(),
3705 [Point::zero()..buffer_1.read(cx).max_point()],
3706 0,
3707 cx,
3708 );
3709 multibuffer.set_excerpts_for_path(
3710 PathKey::sorted(1),
3711 buffer_2.clone(),
3712 [Point::zero()..buffer_2.read(cx).max_point()],
3713 0,
3714 cx,
3715 );
3716 multibuffer.add_diff(diff_1.clone(), cx);
3717 multibuffer.add_diff(diff_2.clone(), cx);
3718 multibuffer
3719 });
3720
3721 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3722 (multibuffer.snapshot(cx), multibuffer.subscribe())
3723 });
3724
3725 assert_new_snapshot(
3726 &multibuffer,
3727 &mut snapshot,
3728 &mut subscription,
3729 cx,
3730 indoc!(
3731 "
3732 - bar
3733 + BAR
3734
3735 - foo
3736 + FOO
3737 "
3738 ),
3739 );
3740
3741 let anchor_1 = multibuffer.read_with(cx, |multibuffer, cx| {
3742 multibuffer
3743 .buffer_anchor_to_anchor(
3744 &buffer_1,
3745 text::Anchor::min_for_buffer(buffer_1.read(cx).remote_id()),
3746 cx,
3747 )
3748 .unwrap()
3749 });
3750 let point_1 = snapshot.summaries_for_anchors::<Point, _>([&anchor_1])[0];
3751 assert_eq!(point_1, Point::new(0, 0));
3752
3753 let anchor_2 = multibuffer.read_with(cx, |multibuffer, cx| {
3754 multibuffer
3755 .buffer_anchor_to_anchor(
3756 &buffer_2,
3757 text::Anchor::min_for_buffer(buffer_2.read(cx).remote_id()),
3758 cx,
3759 )
3760 .unwrap()
3761 });
3762 let point_2 = snapshot.summaries_for_anchors::<Point, _>([&anchor_2])[0];
3763 assert_eq!(point_2, Point::new(3, 0));
3764}
3765
3766#[gpui::test]
3767async fn test_trailing_deletion_without_newline(cx: &mut TestAppContext) {
3768 let base_text_1 = "one\ntwo".to_owned();
3769 let text_1 = "one\n".to_owned();
3770
3771 let buffer_1 = cx.new(|cx| Buffer::local(text_1, cx));
3772 let diff_1 = cx.new(|cx| {
3773 BufferDiff::new_with_base_text(&base_text_1, &buffer_1.read(cx).text_snapshot(), cx)
3774 });
3775 cx.run_until_parked();
3776
3777 let multibuffer = cx.new(|cx| {
3778 let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
3779 multibuffer.set_excerpts_for_path(
3780 PathKey::sorted(0),
3781 buffer_1.clone(),
3782 [Point::zero()..buffer_1.read(cx).max_point()],
3783 0,
3784 cx,
3785 );
3786 multibuffer.add_diff(diff_1.clone(), cx);
3787 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
3788 multibuffer
3789 });
3790
3791 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3792 (multibuffer.snapshot(cx), multibuffer.subscribe())
3793 });
3794
3795 assert_new_snapshot(
3796 &multibuffer,
3797 &mut snapshot,
3798 &mut subscription,
3799 cx,
3800 indoc!(
3801 "
3802 one
3803 - two
3804 "
3805 ),
3806 );
3807
3808 assert_eq!(snapshot.max_point(), Point::new(2, 0));
3809 assert_eq!(snapshot.len().0, 8);
3810
3811 assert_eq!(
3812 snapshot
3813 .dimensions_from_points::<Point>([Point::new(2, 0)])
3814 .collect::<Vec<_>>(),
3815 vec![Point::new(2, 0)]
3816 );
3817
3818 let (_, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3819 assert_eq!(translated_offset.0, "one\n".len());
3820 let (_, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3821 assert_eq!(translated_point, Point::new(1, 0));
3822
3823 // The same, for an excerpt that's not at the end of the multibuffer.
3824
3825 let text_2 = "foo\n".to_owned();
3826 let buffer_2 = cx.new(|cx| Buffer::local(&text_2, cx));
3827 multibuffer.update(cx, |multibuffer, cx| {
3828 multibuffer.set_excerpt_ranges_for_path(
3829 PathKey::sorted(1),
3830 buffer_2.clone(),
3831 &buffer_2.read(cx).snapshot(),
3832 vec![ExcerptRange::new(Point::new(0, 0)..Point::new(1, 0))],
3833 cx,
3834 );
3835 });
3836
3837 assert_new_snapshot(
3838 &multibuffer,
3839 &mut snapshot,
3840 &mut subscription,
3841 cx,
3842 indoc!(
3843 "
3844 one
3845 - two
3846
3847 foo
3848 "
3849 ),
3850 );
3851
3852 assert_eq!(
3853 snapshot
3854 .dimensions_from_points::<Point>([Point::new(2, 0)])
3855 .collect::<Vec<_>>(),
3856 vec![Point::new(2, 0)]
3857 );
3858
3859 let buffer_1_id = buffer_1.read_with(cx, |buffer_1, _| buffer_1.remote_id());
3860 let (buffer, translated_offset) = snapshot.point_to_buffer_offset(Point::new(2, 0)).unwrap();
3861 assert_eq!(buffer.remote_id(), buffer_1_id);
3862 assert_eq!(translated_offset.0, "one\n".len());
3863 let (buffer, translated_point) = snapshot.point_to_buffer_point(Point::new(2, 0)).unwrap();
3864 assert_eq!(buffer.remote_id(), buffer_1_id);
3865 assert_eq!(translated_point, Point::new(1, 0));
3866}
3867
3868fn format_diff(
3869 text: &str,
3870 row_infos: &Vec<RowInfo>,
3871 boundary_rows: &HashSet<MultiBufferRow>,
3872 has_diff: Option<bool>,
3873) -> String {
3874 let has_diff =
3875 has_diff.unwrap_or_else(|| row_infos.iter().any(|info| info.diff_status.is_some()));
3876 text.split('\n')
3877 .enumerate()
3878 .zip(row_infos)
3879 .map(|((ix, line), info)| {
3880 let marker = match info.diff_status.map(|status| status.kind) {
3881 Some(DiffHunkStatusKind::Added) => "+ ",
3882 Some(DiffHunkStatusKind::Deleted) => "- ",
3883 Some(DiffHunkStatusKind::Modified) => unreachable!(),
3884 None => {
3885 if has_diff && !line.is_empty() {
3886 " "
3887 } else {
3888 ""
3889 }
3890 }
3891 };
3892 let boundary_row = if boundary_rows.contains(&MultiBufferRow(ix as u32)) {
3893 if has_diff {
3894 " ----------\n"
3895 } else {
3896 "---------\n"
3897 }
3898 } else {
3899 ""
3900 };
3901 let expand = info
3902 .expand_info
3903 .as_ref()
3904 .map(|expand_info| match expand_info.direction {
3905 ExpandExcerptDirection::Up => " [↑]",
3906 ExpandExcerptDirection::Down => " [↓]",
3907 ExpandExcerptDirection::UpAndDown => " [↕]",
3908 })
3909 .unwrap_or_default();
3910
3911 format!("{boundary_row}{marker}{line}{expand}")
3912 // let mbr = info
3913 // .multibuffer_row
3914 // .map(|row| format!("{:0>3}", row.0))
3915 // .unwrap_or_else(|| "???".to_string());
3916 // let byte_range = format!("{byte_range_start:0>3}..{byte_range_end:0>3}");
3917 // format!("{boundary_row}Row: {mbr}, Bytes: {byte_range} | {marker}{line}{expand}")
3918 })
3919 .collect::<Vec<_>>()
3920 .join("\n")
3921}
3922
3923// fn format_transforms(snapshot: &MultiBufferSnapshot) -> String {
3924// snapshot
3925// .diff_transforms
3926// .iter()
3927// .map(|transform| {
3928// let (kind, summary) = match transform {
3929// DiffTransform::DeletedHunk { summary, .. } => (" Deleted", (*summary).into()),
3930// DiffTransform::FilteredInsertedHunk { summary, .. } => (" Filtered", *summary),
3931// DiffTransform::InsertedHunk { summary, .. } => (" Inserted", *summary),
3932// DiffTransform::Unmodified { summary, .. } => ("Unmodified", *summary),
3933// };
3934// format!("{kind}(len: {}, lines: {:?})", summary.len, summary.lines)
3935// })
3936// .join("\n")
3937// }
3938
3939// fn format_excerpts(snapshot: &MultiBufferSnapshot) -> String {
3940// snapshot
3941// .excerpts
3942// .iter()
3943// .map(|excerpt| {
3944// format!(
3945// "Excerpt(buffer_range = {:?}, lines = {:?}, has_trailing_newline = {:?})",
3946// excerpt.range.context.to_point(&excerpt.buffer),
3947// excerpt.text_summary.lines,
3948// excerpt.has_trailing_newline
3949// )
3950// })
3951// .join("\n")
3952// }
3953
3954#[gpui::test]
3955async fn test_singleton_with_inverted_diff(cx: &mut TestAppContext) {
3956 let text = indoc!(
3957 "
3958 ZERO
3959 one
3960 TWO
3961 three
3962 six
3963 "
3964 );
3965 let base_text = indoc!(
3966 "
3967 one
3968 two
3969 three
3970 four
3971 five
3972 six
3973 "
3974 );
3975
3976 let buffer = cx.new(|cx| Buffer::local(text, cx));
3977 let diff = cx
3978 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
3979 cx.run_until_parked();
3980
3981 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
3982
3983 let multibuffer = cx.new(|cx| {
3984 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
3985 multibuffer.set_all_diff_hunks_expanded(cx);
3986 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
3987 multibuffer
3988 });
3989
3990 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
3991 (multibuffer.snapshot(cx), multibuffer.subscribe())
3992 });
3993
3994 assert_eq!(snapshot.text(), base_text);
3995 assert_new_snapshot(
3996 &multibuffer,
3997 &mut snapshot,
3998 &mut subscription,
3999 cx,
4000 indoc!(
4001 "
4002 one
4003 - two
4004 three
4005 - four
4006 - five
4007 six
4008 "
4009 ),
4010 );
4011
4012 buffer.update(cx, |buffer, cx| {
4013 buffer.edit_via_marked_text(
4014 indoc!(
4015 "
4016 ZERO
4017 one
4018 «<inserted>»W«O
4019 T»hree
4020 six
4021 "
4022 ),
4023 None,
4024 cx,
4025 );
4026 });
4027 cx.run_until_parked();
4028 let update = diff
4029 .update(cx, |diff, cx| {
4030 diff.update_diff(
4031 buffer.read(cx).text_snapshot(),
4032 Some(base_text.into()),
4033 None,
4034 None,
4035 cx,
4036 )
4037 })
4038 .await;
4039 diff.update(cx, |diff, cx| {
4040 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4041 })
4042 .await;
4043 cx.run_until_parked();
4044
4045 assert_new_snapshot(
4046 &multibuffer,
4047 &mut snapshot,
4048 &mut subscription,
4049 cx,
4050 indoc! {
4051 "
4052 one
4053 - two
4054 - three
4055 - four
4056 - five
4057 six
4058 "
4059 },
4060 );
4061
4062 buffer.update(cx, |buffer, cx| {
4063 buffer.set_text("ZERO\nONE\nTWO\n", cx);
4064 });
4065 cx.run_until_parked();
4066 let update = diff
4067 .update(cx, |diff, cx| {
4068 diff.update_diff(
4069 buffer.read(cx).text_snapshot(),
4070 Some(base_text.into()),
4071 None,
4072 None,
4073 cx,
4074 )
4075 })
4076 .await;
4077 diff.update(cx, |diff, cx| {
4078 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4079 })
4080 .await;
4081 cx.run_until_parked();
4082
4083 assert_new_snapshot(
4084 &multibuffer,
4085 &mut snapshot,
4086 &mut subscription,
4087 cx,
4088 indoc! {
4089 "
4090 - one
4091 - two
4092 - three
4093 - four
4094 - five
4095 - six
4096 "
4097 },
4098 );
4099
4100 diff.update(cx, |diff, cx| {
4101 diff.set_base_text(
4102 Some("new base\n".into()),
4103 None,
4104 buffer.read(cx).text_snapshot(),
4105 cx,
4106 )
4107 })
4108 .await
4109 .unwrap();
4110 cx.run_until_parked();
4111
4112 assert_new_snapshot(
4113 &multibuffer,
4114 &mut snapshot,
4115 &mut subscription,
4116 cx,
4117 indoc! {"
4118 - new base
4119 "},
4120 );
4121}
4122
4123#[gpui::test]
4124async fn test_inverted_diff_base_text_change(cx: &mut TestAppContext) {
4125 let base_text = "aaa\nbbb\nccc\n";
4126 let text = "ddd\n";
4127 let buffer = cx.new(|cx| Buffer::local(text, cx));
4128 let diff = cx
4129 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4130 cx.run_until_parked();
4131
4132 let base_text_buffer = diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4133
4134 let multibuffer = cx.new(|cx| {
4135 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4136 multibuffer.set_all_diff_hunks_expanded(cx);
4137 multibuffer.add_inverted_diff(diff.clone(), buffer.clone(), cx);
4138 multibuffer
4139 });
4140
4141 let (mut snapshot, mut subscription) = multibuffer.update(cx, |multibuffer, cx| {
4142 (multibuffer.snapshot(cx), multibuffer.subscribe())
4143 });
4144
4145 assert_eq!(snapshot.text(), base_text);
4146 assert_new_snapshot(
4147 &multibuffer,
4148 &mut snapshot,
4149 &mut subscription,
4150 cx,
4151 indoc!(
4152 "
4153 - aaa
4154 - bbb
4155 - ccc
4156 "
4157 ),
4158 );
4159
4160 let update = diff
4161 .update(cx, |diff, cx| {
4162 diff.update_diff(
4163 buffer.read(cx).text_snapshot(),
4164 Some("ddd\n".into()),
4165 Some(true),
4166 None,
4167 cx,
4168 )
4169 })
4170 .await;
4171 diff.update(cx, |diff, cx| {
4172 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4173 })
4174 .detach();
4175
4176 let _hunks: Vec<_> = multibuffer
4177 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4178 .diff_hunks()
4179 .collect();
4180}
4181
4182#[gpui::test]
4183async fn test_inverted_diff_secondary_version_mismatch(cx: &mut TestAppContext) {
4184 let base_text = "one\ntwo\nthree\nfour\nfive\n";
4185 let index_text = "one\nTWO\nthree\nfour\nfive\n";
4186 let buffer_text = "one\nTWO\nthree\nFOUR\nfive\n";
4187
4188 let buffer = cx.new(|cx| Buffer::local(buffer_text, cx));
4189
4190 let unstaged_diff = cx
4191 .new(|cx| BufferDiff::new_with_base_text(index_text, &buffer.read(cx).text_snapshot(), cx));
4192 cx.run_until_parked();
4193
4194 let uncommitted_diff = cx.new(|cx| {
4195 let mut diff =
4196 BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx);
4197 diff.set_secondary_diff(unstaged_diff.clone());
4198 diff
4199 });
4200 cx.run_until_parked();
4201
4202 buffer.update(cx, |buffer, cx| {
4203 buffer.edit([(0..0, "ZERO\n")], None, cx);
4204 });
4205
4206 let update = unstaged_diff
4207 .update(cx, |diff, cx| {
4208 diff.update_diff(
4209 buffer.read(cx).text_snapshot(),
4210 Some(index_text.into()),
4211 None,
4212 None,
4213 cx,
4214 )
4215 })
4216 .await;
4217 unstaged_diff
4218 .update(cx, |diff, cx| {
4219 diff.set_snapshot(update, &buffer.read(cx).text_snapshot(), cx)
4220 })
4221 .await;
4222
4223 let base_text_buffer =
4224 uncommitted_diff.read_with(cx, |diff, _| diff.base_text_buffer().clone());
4225
4226 let multibuffer = cx.new(|cx| {
4227 let mut multibuffer = MultiBuffer::singleton(base_text_buffer.clone(), cx);
4228 multibuffer.set_all_diff_hunks_expanded(cx);
4229 multibuffer.add_inverted_diff(uncommitted_diff.clone(), buffer.clone(), cx);
4230 multibuffer
4231 });
4232
4233 let _hunks: Vec<_> = multibuffer
4234 .read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx))
4235 .diff_hunks()
4236 .collect();
4237}
4238
4239#[track_caller]
4240fn assert_excerpts_match(
4241 multibuffer: &Entity<MultiBuffer>,
4242 cx: &mut TestAppContext,
4243 expected: &str,
4244) {
4245 let mut output = String::new();
4246 multibuffer.read_with(cx, |multibuffer, cx| {
4247 for (buffer, info) in multibuffer.snapshot(cx).excerpts() {
4248 output.push_str("-----\n");
4249 output.extend(buffer.text_for_range(info.range));
4250 if !output.ends_with('\n') {
4251 output.push('\n');
4252 }
4253 }
4254 });
4255 assert_eq!(output, expected);
4256}
4257
4258#[track_caller]
4259fn assert_new_snapshot(
4260 multibuffer: &Entity<MultiBuffer>,
4261 snapshot: &mut MultiBufferSnapshot,
4262 subscription: &mut Subscription<MultiBufferOffset>,
4263 cx: &mut TestAppContext,
4264 expected_diff: &str,
4265) {
4266 let new_snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4267 let actual_text = new_snapshot.text();
4268 let line_infos = new_snapshot
4269 .row_infos(MultiBufferRow(0))
4270 .collect::<Vec<_>>();
4271 let actual_diff = format_diff(&actual_text, &line_infos, &Default::default(), None);
4272 pretty_assertions::assert_eq!(actual_diff, expected_diff);
4273 check_edits(
4274 snapshot,
4275 &new_snapshot,
4276 &subscription.consume().into_inner(),
4277 );
4278 *snapshot = new_snapshot;
4279}
4280
4281#[track_caller]
4282fn check_edits(
4283 old_snapshot: &MultiBufferSnapshot,
4284 new_snapshot: &MultiBufferSnapshot,
4285 edits: &[Edit<MultiBufferOffset>],
4286) {
4287 let mut text = old_snapshot.text();
4288 let new_text = new_snapshot.text();
4289 for edit in edits.iter().rev() {
4290 if !text.is_char_boundary(edit.old.start.0)
4291 || !text.is_char_boundary(edit.old.end.0)
4292 || !new_text.is_char_boundary(edit.new.start.0)
4293 || !new_text.is_char_boundary(edit.new.end.0)
4294 {
4295 panic!(
4296 "invalid edits: {:?}\nold text: {:?}\nnew text: {:?}",
4297 edits, text, new_text
4298 );
4299 }
4300
4301 text.replace_range(
4302 edit.old.start.0..edit.old.end.0,
4303 &new_text[edit.new.start.0..edit.new.end.0],
4304 );
4305 }
4306
4307 pretty_assertions::assert_eq!(text, new_text, "invalid edits: {:?}", edits);
4308}
4309
4310#[track_caller]
4311fn assert_chunks_in_ranges(snapshot: &MultiBufferSnapshot) {
4312 let full_text = snapshot.text();
4313 for ix in 0..full_text.len() {
4314 let mut chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4315 chunks.seek(MultiBufferOffset(ix)..snapshot.len());
4316 let tail = chunks.map(|chunk| chunk.text).collect::<String>();
4317 assert_eq!(tail, &full_text[ix..], "seek to range: {:?}", ix..);
4318 }
4319}
4320
4321#[track_caller]
4322fn assert_consistent_line_numbers(snapshot: &MultiBufferSnapshot) {
4323 let all_line_numbers = snapshot.row_infos(MultiBufferRow(0)).collect::<Vec<_>>();
4324 for start_row in 1..all_line_numbers.len() {
4325 let line_numbers = snapshot
4326 .row_infos(MultiBufferRow(start_row as u32))
4327 .collect::<Vec<_>>();
4328 assert_eq!(
4329 line_numbers,
4330 all_line_numbers[start_row..],
4331 "start_row: {start_row}"
4332 );
4333 }
4334}
4335
4336#[track_caller]
4337fn assert_position_translation(snapshot: &MultiBufferSnapshot) {
4338 let text = Rope::from(snapshot.text());
4339
4340 let mut left_anchors = Vec::new();
4341 let mut right_anchors = Vec::new();
4342 let mut offsets = Vec::new();
4343 let mut points = Vec::new();
4344 for offset in 0..=text.len() + 1 {
4345 let offset = MultiBufferOffset(offset);
4346 let clipped_left = snapshot.clip_offset(offset, Bias::Left);
4347 let clipped_right = snapshot.clip_offset(offset, Bias::Right);
4348 assert_eq!(
4349 clipped_left.0,
4350 text.clip_offset(offset.0, Bias::Left),
4351 "clip_offset({offset:?}, Left)"
4352 );
4353 assert_eq!(
4354 clipped_right.0,
4355 text.clip_offset(offset.0, Bias::Right),
4356 "clip_offset({offset:?}, Right)"
4357 );
4358 assert_eq!(
4359 snapshot.offset_to_point(clipped_left),
4360 text.offset_to_point(clipped_left.0),
4361 "offset_to_point({})",
4362 clipped_left.0
4363 );
4364 assert_eq!(
4365 snapshot.offset_to_point(clipped_right),
4366 text.offset_to_point(clipped_right.0),
4367 "offset_to_point({})",
4368 clipped_right.0
4369 );
4370 let anchor_after = snapshot.anchor_after(clipped_left);
4371 assert_eq!(
4372 anchor_after.to_offset(snapshot),
4373 clipped_left,
4374 "anchor_after({}).to_offset {anchor_after:?}",
4375 clipped_left.0
4376 );
4377 let anchor_before = snapshot.anchor_before(clipped_left);
4378 assert_eq!(
4379 anchor_before.to_offset(snapshot),
4380 clipped_left,
4381 "anchor_before({}).to_offset",
4382 clipped_left.0
4383 );
4384 left_anchors.push(anchor_before);
4385 right_anchors.push(anchor_after);
4386 offsets.push(clipped_left);
4387 points.push(text.offset_to_point(clipped_left.0));
4388 }
4389
4390 for row in 0..text.max_point().row {
4391 for column in 0..text.line_len(row) + 1 {
4392 let point = Point { row, column };
4393 let clipped_left = snapshot.clip_point(point, Bias::Left);
4394 let clipped_right = snapshot.clip_point(point, Bias::Right);
4395 assert_eq!(
4396 clipped_left,
4397 text.clip_point(point, Bias::Left),
4398 "clip_point({point:?}, Left)"
4399 );
4400 assert_eq!(
4401 clipped_right,
4402 text.clip_point(point, Bias::Right),
4403 "clip_point({point:?}, Right)"
4404 );
4405 assert_eq!(
4406 snapshot.point_to_offset(clipped_left).0,
4407 text.point_to_offset(clipped_left),
4408 "point_to_offset({clipped_left:?})"
4409 );
4410 assert_eq!(
4411 snapshot.point_to_offset(clipped_right).0,
4412 text.point_to_offset(clipped_right),
4413 "point_to_offset({clipped_right:?})"
4414 );
4415 }
4416 }
4417
4418 assert_eq!(
4419 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&left_anchors),
4420 offsets,
4421 "left_anchors <-> offsets"
4422 );
4423 assert_eq!(
4424 snapshot.summaries_for_anchors::<Point, _>(&left_anchors),
4425 points,
4426 "left_anchors <-> points"
4427 );
4428 assert_eq!(
4429 snapshot.summaries_for_anchors::<MultiBufferOffset, _>(&right_anchors),
4430 offsets,
4431 "right_anchors <-> offsets"
4432 );
4433 assert_eq!(
4434 snapshot.summaries_for_anchors::<Point, _>(&right_anchors),
4435 points,
4436 "right_anchors <-> points"
4437 );
4438
4439 for (anchors, bias) in [(&left_anchors, Bias::Left), (&right_anchors, Bias::Right)] {
4440 for (ix, (offset, anchor)) in offsets.iter().zip(anchors).enumerate() {
4441 if ix > 0 && *offset == MultiBufferOffset(252) && offset > &offsets[ix - 1] {
4442 let prev_anchor = left_anchors[ix - 1];
4443 assert!(
4444 anchor.cmp(&prev_anchor, snapshot).is_gt(),
4445 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_gt()",
4446 offsets[ix],
4447 offsets[ix - 1],
4448 );
4449 assert!(
4450 prev_anchor.cmp(anchor, snapshot).is_lt(),
4451 "anchor({}, {bias:?}).cmp(&anchor({}, {bias:?}).is_lt()",
4452 offsets[ix - 1],
4453 offsets[ix],
4454 );
4455 }
4456 }
4457 }
4458
4459 if let Some((buffer, offset)) = snapshot.point_to_buffer_offset(snapshot.max_point()) {
4460 assert!(offset.0 <= buffer.len());
4461 }
4462 if let Some((buffer, point)) = snapshot.point_to_buffer_point(snapshot.max_point()) {
4463 assert!(point <= buffer.max_point());
4464 }
4465}
4466
4467fn assert_line_indents(snapshot: &MultiBufferSnapshot) {
4468 let max_row = snapshot.max_point().row;
4469 let buffer_id = snapshot.excerpts().next().unwrap().1.buffer_id;
4470 let text = text::Buffer::new(ReplicaId::LOCAL, buffer_id, snapshot.text());
4471 let mut line_indents = text
4472 .line_indents_in_row_range(0..max_row + 1)
4473 .collect::<Vec<_>>();
4474 for start_row in 0..snapshot.max_point().row {
4475 pretty_assertions::assert_eq!(
4476 snapshot
4477 .line_indents(MultiBufferRow(start_row), |_| true)
4478 .map(|(row, indent, _)| (row.0, indent))
4479 .collect::<Vec<_>>(),
4480 &line_indents[(start_row as usize)..],
4481 "line_indents({start_row})"
4482 );
4483 }
4484
4485 line_indents.reverse();
4486 pretty_assertions::assert_eq!(
4487 snapshot
4488 .reversed_line_indents(MultiBufferRow(max_row), |_| true)
4489 .map(|(row, indent, _)| (row.0, indent))
4490 .collect::<Vec<_>>(),
4491 &line_indents[..],
4492 "reversed_line_indents({max_row})"
4493 );
4494}
4495
4496#[gpui::test]
4497fn test_new_empty_buffer_uses_untitled_title(cx: &mut App) {
4498 let buffer = cx.new(|cx| Buffer::local("", cx));
4499 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4500
4501 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4502}
4503
4504#[gpui::test]
4505fn test_new_empty_buffer_uses_untitled_title_when_only_contains_whitespace(cx: &mut App) {
4506 let buffer = cx.new(|cx| Buffer::local("\n ", cx));
4507 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4508
4509 assert_eq!(multibuffer.read(cx).title(cx), "untitled");
4510}
4511
4512#[gpui::test]
4513fn test_new_empty_buffer_takes_first_line_for_title(cx: &mut App) {
4514 let buffer = cx.new(|cx| Buffer::local("Hello World\nSecond line", cx));
4515 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4516
4517 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4518}
4519
4520#[gpui::test]
4521fn test_new_empty_buffer_takes_trimmed_first_line_for_title(cx: &mut App) {
4522 let buffer = cx.new(|cx| Buffer::local("\nHello, World ", cx));
4523 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4524
4525 assert_eq!(multibuffer.read(cx).title(cx), "Hello, World");
4526}
4527
4528#[gpui::test]
4529fn test_new_empty_buffer_uses_truncated_first_line_for_title(cx: &mut App) {
4530 let title = "aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeee";
4531 let title_after = "aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd";
4532 let buffer = cx.new(|cx| Buffer::local(title, cx));
4533 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4534
4535 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4536}
4537
4538#[gpui::test]
4539fn test_new_empty_buffer_uses_truncated_first_line_for_title_after_merging_adjacent_spaces(
4540 cx: &mut App,
4541) {
4542 let title = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddddeeeeeeeeee";
4543 let title_after = "aaaaaaaaaabbbbbbbbbb ccccccccccddddddddd";
4544 let buffer = cx.new(|cx| Buffer::local(title, cx));
4545 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4546
4547 assert_eq!(multibuffer.read(cx).title(cx), title_after);
4548}
4549
4550#[gpui::test]
4551fn test_new_empty_buffers_title_can_be_set(cx: &mut App) {
4552 let buffer = cx.new(|cx| Buffer::local("Hello World", cx));
4553 let multibuffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
4554 assert_eq!(multibuffer.read(cx).title(cx), "Hello World");
4555
4556 multibuffer.update(cx, |multibuffer, cx| {
4557 multibuffer.set_title("Hey".into(), cx)
4558 });
4559 assert_eq!(multibuffer.read(cx).title(cx), "Hey");
4560}
4561
4562#[gpui::test(iterations = 100)]
4563fn test_random_chunk_bitmaps(cx: &mut App, mut rng: StdRng) {
4564 let multibuffer = if rng.random() {
4565 let len = rng.random_range(0..10000);
4566 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4567 let buffer = cx.new(|cx| Buffer::local(text, cx));
4568 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4569 } else {
4570 MultiBuffer::build_random(&mut rng, cx)
4571 };
4572
4573 let snapshot = multibuffer.read(cx).snapshot(cx);
4574
4575 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4576
4577 for chunk in chunks {
4578 let chunk_text = chunk.text;
4579 let chars_bitmap = chunk.chars;
4580 let tabs_bitmap = chunk.tabs;
4581
4582 if chunk_text.is_empty() {
4583 assert_eq!(
4584 chars_bitmap, 0,
4585 "Empty chunk should have empty chars bitmap"
4586 );
4587 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4588 continue;
4589 }
4590
4591 assert!(
4592 chunk_text.len() <= 128,
4593 "Chunk text length {} exceeds 128 bytes",
4594 chunk_text.len()
4595 );
4596
4597 // Verify chars bitmap
4598 let char_indices = chunk_text
4599 .char_indices()
4600 .map(|(i, _)| i)
4601 .collect::<Vec<_>>();
4602
4603 for byte_idx in 0..chunk_text.len() {
4604 let should_have_bit = char_indices.contains(&byte_idx);
4605 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4606
4607 if has_bit != should_have_bit {
4608 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4609 eprintln!("Char indices: {:?}", char_indices);
4610 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4611 }
4612
4613 assert_eq!(
4614 has_bit, should_have_bit,
4615 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4616 byte_idx, chunk_text, should_have_bit, has_bit
4617 );
4618 }
4619
4620 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4621 let is_tab = byte == b'\t';
4622 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4623
4624 if has_bit != is_tab {
4625 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4626 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4627 assert_eq!(
4628 has_bit, is_tab,
4629 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4630 byte_idx, chunk_text, byte as char, is_tab, has_bit
4631 );
4632 }
4633 }
4634 }
4635}
4636
4637#[gpui::test(iterations = 10)]
4638fn test_random_chunk_bitmaps_with_diffs(cx: &mut App, mut rng: StdRng) {
4639 let settings_store = SettingsStore::test(cx);
4640 cx.set_global(settings_store);
4641 use buffer_diff::BufferDiff;
4642 use util::RandomCharIter;
4643
4644 let multibuffer = if rng.random() {
4645 let len = rng.random_range(100..10000);
4646 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
4647 let buffer = cx.new(|cx| Buffer::local(text, cx));
4648 cx.new(|cx| MultiBuffer::singleton(buffer, cx))
4649 } else {
4650 MultiBuffer::build_random(&mut rng, cx)
4651 };
4652
4653 let _diff_count = rng.random_range(1..5);
4654 let mut diffs = Vec::new();
4655
4656 multibuffer.update(cx, |multibuffer, cx| {
4657 for buffer_id in multibuffer.all_buffer_ids() {
4658 if rng.random_bool(0.7) {
4659 if let Some(buffer_handle) = multibuffer.buffer(buffer_id) {
4660 let buffer_text = buffer_handle.read(cx).text();
4661 let mut base_text = String::new();
4662
4663 for line in buffer_text.lines() {
4664 if rng.random_bool(0.3) {
4665 continue;
4666 } else if rng.random_bool(0.3) {
4667 let line_len = rng.random_range(0..50);
4668 let modified_line = RandomCharIter::new(&mut rng)
4669 .take(line_len)
4670 .collect::<String>();
4671 base_text.push_str(&modified_line);
4672 base_text.push('\n');
4673 } else {
4674 base_text.push_str(line);
4675 base_text.push('\n');
4676 }
4677 }
4678
4679 if rng.random_bool(0.5) {
4680 let extra_lines = rng.random_range(1..5);
4681 for _ in 0..extra_lines {
4682 let line_len = rng.random_range(0..50);
4683 let extra_line = RandomCharIter::new(&mut rng)
4684 .take(line_len)
4685 .collect::<String>();
4686 base_text.push_str(&extra_line);
4687 base_text.push('\n');
4688 }
4689 }
4690
4691 let diff = cx.new(|cx| {
4692 BufferDiff::new_with_base_text(
4693 &base_text,
4694 &buffer_handle.read(cx).text_snapshot(),
4695 cx,
4696 )
4697 });
4698 diffs.push(diff.clone());
4699 multibuffer.add_diff(diff, cx);
4700 }
4701 }
4702 }
4703 });
4704
4705 multibuffer.update(cx, |multibuffer, cx| {
4706 if rng.random_bool(0.5) {
4707 multibuffer.set_all_diff_hunks_expanded(cx);
4708 } else {
4709 let snapshot = multibuffer.snapshot(cx);
4710 let text = snapshot.text();
4711
4712 let mut ranges = Vec::new();
4713 for _ in 0..rng.random_range(1..5) {
4714 if snapshot.len().0 == 0 {
4715 break;
4716 }
4717
4718 let diff_size = rng.random_range(5..1000);
4719 let mut start = rng.random_range(0..snapshot.len().0);
4720
4721 while !text.is_char_boundary(start) {
4722 start = start.saturating_sub(1);
4723 }
4724
4725 let mut end = rng.random_range(start..snapshot.len().0.min(start + diff_size));
4726
4727 while !text.is_char_boundary(end) {
4728 end = end.saturating_add(1);
4729 }
4730 let start_anchor = snapshot.anchor_after(MultiBufferOffset(start));
4731 let end_anchor = snapshot.anchor_before(MultiBufferOffset(end));
4732 ranges.push(start_anchor..end_anchor);
4733 }
4734 multibuffer.expand_diff_hunks(ranges, cx);
4735 }
4736 });
4737
4738 let snapshot = multibuffer.read(cx).snapshot(cx);
4739
4740 let chunks = snapshot.chunks(MultiBufferOffset(0)..snapshot.len(), false);
4741
4742 for chunk in chunks {
4743 let chunk_text = chunk.text;
4744 let chars_bitmap = chunk.chars;
4745 let tabs_bitmap = chunk.tabs;
4746
4747 if chunk_text.is_empty() {
4748 assert_eq!(
4749 chars_bitmap, 0,
4750 "Empty chunk should have empty chars bitmap"
4751 );
4752 assert_eq!(tabs_bitmap, 0, "Empty chunk should have empty tabs bitmap");
4753 continue;
4754 }
4755
4756 assert!(
4757 chunk_text.len() <= 128,
4758 "Chunk text length {} exceeds 128 bytes",
4759 chunk_text.len()
4760 );
4761
4762 let char_indices = chunk_text
4763 .char_indices()
4764 .map(|(i, _)| i)
4765 .collect::<Vec<_>>();
4766
4767 for byte_idx in 0..chunk_text.len() {
4768 let should_have_bit = char_indices.contains(&byte_idx);
4769 let has_bit = chars_bitmap & (1 << byte_idx) != 0;
4770
4771 if has_bit != should_have_bit {
4772 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4773 eprintln!("Char indices: {:?}", char_indices);
4774 eprintln!("Chars bitmap: {:#b}", chars_bitmap);
4775 }
4776
4777 assert_eq!(
4778 has_bit, should_have_bit,
4779 "Chars bitmap mismatch at byte index {} in chunk {:?}. Expected bit: {}, Got bit: {}",
4780 byte_idx, chunk_text, should_have_bit, has_bit
4781 );
4782 }
4783
4784 for (byte_idx, byte) in chunk_text.bytes().enumerate() {
4785 let is_tab = byte == b'\t';
4786 let has_bit = tabs_bitmap & (1 << byte_idx) != 0;
4787
4788 if has_bit != is_tab {
4789 eprintln!("Chunk text bytes: {:?}", chunk_text.as_bytes());
4790 eprintln!("Tabs bitmap: {:#b}", tabs_bitmap);
4791 assert_eq!(
4792 has_bit, is_tab,
4793 "Tabs bitmap mismatch at byte index {} in chunk {:?}. Byte: {:?}, Expected bit: {}, Got bit: {}",
4794 byte_idx, chunk_text, byte as char, is_tab, has_bit
4795 );
4796 }
4797 }
4798 }
4799}
4800
4801fn collect_word_diffs(
4802 base_text: &str,
4803 modified_text: &str,
4804 cx: &mut TestAppContext,
4805) -> Vec<String> {
4806 let buffer = cx.new(|cx| Buffer::local(modified_text, cx));
4807 let diff = cx
4808 .new(|cx| BufferDiff::new_with_base_text(base_text, &buffer.read(cx).text_snapshot(), cx));
4809 cx.run_until_parked();
4810
4811 let multibuffer = cx.new(|cx| {
4812 let mut multibuffer = MultiBuffer::singleton(buffer.clone(), cx);
4813 multibuffer.add_diff(diff.clone(), cx);
4814 multibuffer
4815 });
4816
4817 multibuffer.update(cx, |multibuffer, cx| {
4818 multibuffer.expand_diff_hunks(vec![Anchor::min()..Anchor::max()], cx);
4819 });
4820
4821 let snapshot = multibuffer.read_with(cx, |multibuffer, cx| multibuffer.snapshot(cx));
4822 let text = snapshot.text();
4823
4824 snapshot
4825 .diff_hunks()
4826 .flat_map(|hunk| hunk.word_diffs)
4827 .map(|range| text[range.start.0..range.end.0].to_string())
4828 .collect()
4829}
4830
4831#[gpui::test]
4832async fn test_word_diff_simple_replacement(cx: &mut TestAppContext) {
4833 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4834 cx.set_global(settings_store);
4835
4836 let base_text = "hello world foo bar\n";
4837 let modified_text = "hello WORLD foo BAR\n";
4838
4839 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4840
4841 assert_eq!(word_diffs, vec!["world", "bar", "WORLD", "BAR"]);
4842}
4843
4844#[gpui::test]
4845async fn test_word_diff_white_space(cx: &mut TestAppContext) {
4846 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4847 cx.set_global(settings_store);
4848
4849 let base_text = "hello world foo bar\n";
4850 let modified_text = " hello world foo bar\n";
4851
4852 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4853
4854 assert_eq!(word_diffs, vec![" "]);
4855}
4856
4857#[gpui::test]
4858async fn test_word_diff_consecutive_modified_lines(cx: &mut TestAppContext) {
4859 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4860 cx.set_global(settings_store);
4861
4862 let base_text = "aaa bbb\nccc ddd\n";
4863 let modified_text = "aaa BBB\nccc DDD\n";
4864
4865 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4866
4867 assert_eq!(
4868 word_diffs,
4869 vec!["bbb", "ddd", "BBB", "DDD"],
4870 "consecutive modified lines should produce word diffs when line counts match"
4871 );
4872}
4873
4874#[gpui::test]
4875async fn test_word_diff_modified_lines_with_deletion_between(cx: &mut TestAppContext) {
4876 let settings_store = cx.update(|cx| SettingsStore::test(cx));
4877 cx.set_global(settings_store);
4878
4879 let base_text = "aaa bbb\ndeleted line\nccc ddd\n";
4880 let modified_text = "aaa BBB\nccc DDD\n";
4881
4882 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4883
4884 assert_eq!(
4885 word_diffs,
4886 Vec::<String>::new(),
4887 "modified lines with a deleted line between should not produce word diffs"
4888 );
4889}
4890
4891#[gpui::test]
4892async fn test_word_diff_disabled(cx: &mut TestAppContext) {
4893 let settings_store = cx.update(|cx| {
4894 let mut settings_store = SettingsStore::test(cx);
4895 settings_store.update_user_settings(cx, |settings| {
4896 settings.project.all_languages.defaults.word_diff_enabled = Some(false);
4897 });
4898 settings_store
4899 });
4900 cx.set_global(settings_store);
4901
4902 let base_text = "hello world\n";
4903 let modified_text = "hello WORLD\n";
4904
4905 let word_diffs = collect_word_diffs(base_text, modified_text, cx);
4906
4907 assert_eq!(
4908 word_diffs,
4909 Vec::<String>::new(),
4910 "word diffs should be empty when disabled"
4911 );
4912}
4913
4914/// Tests `excerpt_containing` and `excerpts_for_range` (functions mapping multi-buffer text-coordinates to excerpts)
4915#[gpui::test]
4916fn test_excerpts_containment_functions(cx: &mut App) {
4917 // Multibuffer content for these tests:
4918 // 0123
4919 // 0: aa0
4920 // 1: aa1
4921 // -----
4922 // 2: bb0
4923 // 3: bb1
4924 // -----MultiBufferOffset(0)..
4925 // 4: cc0
4926
4927 let buffer_1 = cx.new(|cx| Buffer::local("aa0\naa1", cx));
4928 let buffer_2 = cx.new(|cx| Buffer::local("bb0\nbb1", cx));
4929 let buffer_3 = cx.new(|cx| Buffer::local("cc0", cx));
4930
4931 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
4932
4933 let (excerpt_1_info, excerpt_2_info, excerpt_3_info) =
4934 multibuffer.update(cx, |multibuffer, cx| {
4935 multibuffer.set_excerpts_for_path(
4936 PathKey::sorted(0),
4937 buffer_1.clone(),
4938 [Point::new(0, 0)..Point::new(1, 3)],
4939 0,
4940 cx,
4941 );
4942
4943 multibuffer.set_excerpts_for_path(
4944 PathKey::sorted(1),
4945 buffer_2.clone(),
4946 [Point::new(0, 0)..Point::new(1, 3)],
4947 0,
4948 cx,
4949 );
4950
4951 multibuffer.set_excerpts_for_path(
4952 PathKey::sorted(2),
4953 buffer_3.clone(),
4954 [Point::new(0, 0)..Point::new(0, 3)],
4955 0,
4956 cx,
4957 );
4958
4959 let snapshot = multibuffer.snapshot(cx);
4960 let mut infos = snapshot.excerpts().map(|(_, info)| info);
4961 (
4962 infos.next().unwrap(),
4963 infos.next().unwrap(),
4964 infos.next().unwrap(),
4965 )
4966 });
4967
4968 let snapshot = multibuffer.read(cx).snapshot(cx);
4969
4970 assert_eq!(snapshot.text(), "aa0\naa1\nbb0\nbb1\ncc0");
4971
4972 //// Test `excerpts_for_range`
4973
4974 let p00 = snapshot.point_to_offset(Point::new(0, 0));
4975 let p10 = snapshot.point_to_offset(Point::new(1, 0));
4976 let p20 = snapshot.point_to_offset(Point::new(2, 0));
4977 let p23 = snapshot.point_to_offset(Point::new(2, 3));
4978 let p13 = snapshot.point_to_offset(Point::new(1, 3));
4979 let p40 = snapshot.point_to_offset(Point::new(4, 0));
4980 let p43 = snapshot.point_to_offset(Point::new(4, 3));
4981
4982 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p00).collect();
4983 assert_eq!(excerpts.len(), 1);
4984 assert_eq!(excerpts[0].info(), excerpt_1_info);
4985
4986 // Cursor at very end of excerpt 3
4987 let excerpts: Vec<_> = snapshot.excerpts_for_range(p43..p43).collect();
4988 assert_eq!(excerpts.len(), 1);
4989 assert_eq!(excerpts[0].info(), excerpt_3_info);
4990
4991 let excerpts: Vec<_> = snapshot.excerpts_for_range(p00..p23).collect();
4992 assert_eq!(excerpts.len(), 2);
4993 assert_eq!(excerpts[0].info(), excerpt_1_info);
4994 assert_eq!(excerpts[1].info(), excerpt_2_info);
4995
4996 // This range represent an selection with end-point just inside excerpt_2
4997 // Today we only expand the first excerpt, but another interpretation that
4998 // we could consider is expanding both here
4999 let excerpts: Vec<_> = snapshot.excerpts_for_range(p10..p20).collect();
5000 assert_eq!(excerpts.len(), 1);
5001 assert_eq!(excerpts[0].info(), excerpt_1_info);
5002
5003 //// Test that `excerpts_for_range` and `excerpt_containing` agree for all single offsets (cursor positions)
5004 for offset in 0..=snapshot.len().0 {
5005 let offset = MultiBufferOffset(offset);
5006 let excerpts_for_range: Vec<_> = snapshot.excerpts_for_range(offset..offset).collect();
5007 assert_eq!(
5008 excerpts_for_range.len(),
5009 1,
5010 "Expected exactly one excerpt for offset {offset}",
5011 );
5012
5013 let excerpt_containing = snapshot.excerpt_containing(offset..offset);
5014 assert!(
5015 excerpt_containing.is_some(),
5016 "Expected excerpt_containing to find excerpt for offset {offset}",
5017 );
5018
5019 assert_eq!(
5020 excerpts_for_range[0].info(),
5021 excerpt_containing.unwrap().excerpt.info(),
5022 "excerpts_for_range and excerpt_containing should agree for offset {offset}",
5023 );
5024 }
5025
5026 //// Test `excerpt_containing` behavior with ranges:
5027
5028 // Ranges intersecting a single-excerpt
5029 let containing = snapshot.excerpt_containing(p00..p13);
5030 assert!(containing.is_some());
5031 assert_eq!(containing.unwrap().excerpt.info(), excerpt_1_info);
5032
5033 // Ranges intersecting multiple excerpts (should return None)
5034 let containing = snapshot.excerpt_containing(p20..p40);
5035 assert!(
5036 containing.is_none(),
5037 "excerpt_containing should return None for ranges spanning multiple excerpts"
5038 );
5039}
5040
5041#[gpui::test]
5042fn test_range_to_buffer_ranges(cx: &mut App) {
5043 let buffer_1 = cx.new(|cx| Buffer::local("aaa\nbbb", cx));
5044 let buffer_2 = cx.new(|cx| Buffer::local("ccc", cx));
5045
5046 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5047 multibuffer.update(cx, |multibuffer, cx| {
5048 multibuffer.set_excerpts_for_path(
5049 PathKey::sorted(0),
5050 buffer_1.clone(),
5051 [Point::new(0, 0)..Point::new(1, 3)],
5052 0,
5053 cx,
5054 );
5055
5056 multibuffer.set_excerpts_for_path(
5057 PathKey::sorted(1),
5058 buffer_2.clone(),
5059 [Point::new(0, 0)..Point::new(0, 3)],
5060 0,
5061 cx,
5062 );
5063 });
5064
5065 let snapshot = multibuffer.read(cx).snapshot(cx);
5066 assert_eq!(snapshot.text(), "aaa\nbbb\nccc");
5067
5068 let excerpt_2_start = Point::new(2, 0);
5069
5070 let ranges_half_open = snapshot.range_to_buffer_ranges(Point::zero()..excerpt_2_start);
5071 assert_eq!(
5072 ranges_half_open.len(),
5073 1,
5074 "Half-open range ending at excerpt start should EXCLUDE that excerpt"
5075 );
5076 assert_eq!(ranges_half_open[0].1, BufferOffset(0)..BufferOffset(7));
5077 assert_eq!(
5078 ranges_half_open[0].0.remote_id(),
5079 buffer_1.read(cx).remote_id()
5080 );
5081
5082 let buffer_empty = cx.new(|cx| Buffer::local("", cx));
5083 let multibuffer_trailing_empty = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5084 let (te_excerpt_1_info, te_excerpt_2_info) =
5085 multibuffer_trailing_empty.update(cx, |multibuffer, cx| {
5086 multibuffer.set_excerpts_for_path(
5087 PathKey::sorted(0),
5088 buffer_1.clone(),
5089 [Point::new(0, 0)..Point::new(1, 3)],
5090 0,
5091 cx,
5092 );
5093
5094 multibuffer.set_excerpts_for_path(
5095 PathKey::sorted(1),
5096 buffer_empty.clone(),
5097 [Point::new(0, 0)..Point::new(0, 0)],
5098 0,
5099 cx,
5100 );
5101
5102 let snapshot = multibuffer.snapshot(cx);
5103 let mut infos = snapshot.excerpts().map(|(_, info)| info);
5104 (infos.next().unwrap(), infos.next().unwrap())
5105 });
5106
5107 let snapshot_trailing = multibuffer_trailing_empty.read(cx).snapshot(cx);
5108 assert_eq!(snapshot_trailing.text(), "aaa\nbbb\n");
5109
5110 let max_point = snapshot_trailing.max_point();
5111
5112 let ranges_half_open_max =
5113 snapshot_trailing.range_to_buffer_ranges_with_context(Point::zero()..max_point);
5114 assert_eq!(
5115 ranges_half_open_max.len(),
5116 2,
5117 "Should include trailing empty excerpts"
5118 );
5119 assert_eq!(ranges_half_open_max[0].2, te_excerpt_1_info.range);
5120}
5121
5122#[gpui::test]
5123fn test_cannot_seek_backward_after_excerpt_replacement(cx: &mut TestAppContext) {
5124 let buffer_b_text: String = (0..50).map(|i| format!("line_b {i}\n")).collect();
5125 let buffer_b = cx.new(|cx| Buffer::local(buffer_b_text, cx));
5126
5127 let buffer_c_text: String = (0..10).map(|i| format!("line_c {i}\n")).collect();
5128 let buffer_c = cx.new(|cx| Buffer::local(buffer_c_text, cx));
5129
5130 let buffer_d_text: String = (0..10).map(|i| format!("line_d {i}\n")).collect();
5131 let buffer_d = cx.new(|cx| Buffer::local(buffer_d_text, cx));
5132
5133 let path_b = PathKey::with_sort_prefix(0, rel_path("bbb.rs").into_arc());
5134 let path_c = PathKey::with_sort_prefix(0, rel_path("ddd.rs").into_arc());
5135 let path_d = PathKey::with_sort_prefix(0, rel_path("ccc.rs").into_arc());
5136
5137 let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
5138
5139 multibuffer.update(cx, |multibuffer, cx| {
5140 multibuffer.set_excerpts_for_path(
5141 path_b.clone(),
5142 buffer_b.clone(),
5143 vec![
5144 Point::row_range(0..3),
5145 Point::row_range(15..18),
5146 Point::row_range(30..33),
5147 ],
5148 0,
5149 cx,
5150 );
5151 });
5152
5153 multibuffer.update(cx, |multibuffer, cx| {
5154 multibuffer.set_excerpts_for_path(
5155 path_c.clone(),
5156 buffer_c.clone(),
5157 vec![Point::row_range(0..3)],
5158 0,
5159 cx,
5160 );
5161 });
5162
5163 let (anchor_in_e_b2, anchor_in_e_b3) = multibuffer.read_with(cx, |multibuffer, cx| {
5164 let snapshot = multibuffer.snapshot(cx);
5165 let excerpt_infos: Vec<ExcerptInfo> = snapshot.excerpts().map(|(_, info)| info).collect();
5166 assert_eq!(excerpt_infos.len(), 4, "expected 4 excerpts (3×B + 1×C)");
5167
5168 let e_b2_info = excerpt_infos[1].clone();
5169 let e_b3_info = excerpt_infos[2].clone();
5170
5171 let anchor_b2 = Anchor::in_buffer(e_b2_info.path_key_index, e_b2_info.range.start);
5172 let anchor_b3 = Anchor::in_buffer(e_b3_info.path_key_index, e_b3_info.range.start);
5173 (anchor_b2, anchor_b3)
5174 });
5175
5176 multibuffer.update(cx, |multibuffer, cx| {
5177 multibuffer.set_excerpts_for_path(
5178 path_b.clone(),
5179 buffer_b.clone(),
5180 vec![Point::row_range(0..3), Point::row_range(28..36)],
5181 0,
5182 cx,
5183 );
5184 });
5185
5186 multibuffer.update(cx, |multibuffer, cx| {
5187 multibuffer.set_excerpts_for_path(
5188 path_d.clone(),
5189 buffer_d.clone(),
5190 vec![Point::row_range(0..3)],
5191 0,
5192 cx,
5193 );
5194 });
5195
5196 multibuffer.read_with(cx, |multibuffer, cx| {
5197 let snapshot = multibuffer.snapshot(cx);
5198 snapshot.summaries_for_anchors::<Point, _>(&[anchor_in_e_b2, anchor_in_e_b3]);
5199 });
5200}