1use super::{
2 fold_map::{self, FoldChunks, FoldEdit, FoldPoint, FoldSnapshot},
3 TextHighlights,
4};
5use crate::MultiBufferSnapshot;
6use gpui::fonts::HighlightStyle;
7use language::{Chunk, Point};
8use std::{cmp, mem, num::NonZeroU32, ops::Range};
9use sum_tree::Bias;
10
11const MAX_EXPANSION_COLUMN: u32 = 256;
12
13pub struct TabMap(TabSnapshot);
14
15impl TabMap {
16 pub fn new(fold_snapshot: FoldSnapshot, tab_size: NonZeroU32) -> (Self, TabSnapshot) {
17 let snapshot = TabSnapshot {
18 fold_snapshot,
19 tab_size,
20 max_expansion_column: MAX_EXPANSION_COLUMN,
21 version: 0,
22 };
23 (Self(snapshot.clone()), snapshot)
24 }
25
26 #[cfg(test)]
27 pub fn set_max_expansion_column(&mut self, column: u32) -> TabSnapshot {
28 self.0.max_expansion_column = column;
29 self.0.clone()
30 }
31
32 pub fn sync(
33 &mut self,
34 fold_snapshot: FoldSnapshot,
35 mut fold_edits: Vec<FoldEdit>,
36 tab_size: NonZeroU32,
37 ) -> (TabSnapshot, Vec<TabEdit>) {
38 let old_snapshot = &mut self.0;
39 let mut new_snapshot = TabSnapshot {
40 fold_snapshot,
41 tab_size,
42 max_expansion_column: old_snapshot.max_expansion_column,
43 version: old_snapshot.version,
44 };
45
46 if old_snapshot.fold_snapshot.version != new_snapshot.fold_snapshot.version {
47 new_snapshot.version += 1;
48 }
49
50 let mut tab_edits = Vec::with_capacity(fold_edits.len());
51
52 if old_snapshot.tab_size == new_snapshot.tab_size {
53 // Expand each edit to include the next tab on the same line as the edit,
54 // and any subsequent tabs on that line that moved across the tab expansion
55 // boundary.
56 for fold_edit in &mut fold_edits {
57 let old_end = fold_edit.old.end.to_point(&old_snapshot.fold_snapshot);
58 let old_end_row_successor_offset = cmp::min(
59 FoldPoint::new(old_end.row() + 1, 0),
60 old_snapshot.fold_snapshot.max_point(),
61 )
62 .to_offset(&old_snapshot.fold_snapshot);
63 let new_end = fold_edit.new.end.to_point(&new_snapshot.fold_snapshot);
64
65 let mut offset_from_edit = 0;
66 let mut first_tab_offset = None;
67 let mut last_tab_with_changed_expansion_offset = None;
68 'outer: for chunk in old_snapshot.fold_snapshot.chunks(
69 fold_edit.old.end..old_end_row_successor_offset,
70 false,
71 None,
72 None,
73 None,
74 ) {
75 for (ix, _) in chunk.text.match_indices('\t') {
76 let offset_from_edit = offset_from_edit + (ix as u32);
77 if first_tab_offset.is_none() {
78 first_tab_offset = Some(offset_from_edit);
79 }
80
81 let old_column = old_end.column() + offset_from_edit;
82 let new_column = new_end.column() + offset_from_edit;
83 let was_expanded = old_column < old_snapshot.max_expansion_column;
84 let is_expanded = new_column < new_snapshot.max_expansion_column;
85 if was_expanded != is_expanded {
86 last_tab_with_changed_expansion_offset = Some(offset_from_edit);
87 } else if !was_expanded && !is_expanded {
88 break 'outer;
89 }
90 }
91
92 offset_from_edit += chunk.text.len() as u32;
93 if old_end.column() + offset_from_edit >= old_snapshot.max_expansion_column
94 && new_end.column() + offset_from_edit >= new_snapshot.max_expansion_column
95 {
96 break;
97 }
98 }
99
100 if let Some(offset) = last_tab_with_changed_expansion_offset.or(first_tab_offset) {
101 fold_edit.old.end.0 += offset as usize + 1;
102 fold_edit.new.end.0 += offset as usize + 1;
103 }
104 }
105
106 // Combine any edits that overlap due to the expansion.
107 let mut ix = 1;
108 while ix < fold_edits.len() {
109 let (prev_edits, next_edits) = fold_edits.split_at_mut(ix);
110 let prev_edit = prev_edits.last_mut().unwrap();
111 let edit = &next_edits[0];
112 if prev_edit.old.end >= edit.old.start {
113 prev_edit.old.end = edit.old.end;
114 prev_edit.new.end = edit.new.end;
115 fold_edits.remove(ix);
116 } else {
117 ix += 1;
118 }
119 }
120
121 for fold_edit in fold_edits {
122 let old_start = fold_edit.old.start.to_point(&old_snapshot.fold_snapshot);
123 let old_end = fold_edit.old.end.to_point(&old_snapshot.fold_snapshot);
124 let new_start = fold_edit.new.start.to_point(&new_snapshot.fold_snapshot);
125 let new_end = fold_edit.new.end.to_point(&new_snapshot.fold_snapshot);
126 tab_edits.push(TabEdit {
127 old: old_snapshot.to_tab_point(old_start)..old_snapshot.to_tab_point(old_end),
128 new: new_snapshot.to_tab_point(new_start)..new_snapshot.to_tab_point(new_end),
129 });
130 }
131 } else {
132 new_snapshot.version += 1;
133 tab_edits.push(TabEdit {
134 old: TabPoint::zero()..old_snapshot.max_point(),
135 new: TabPoint::zero()..new_snapshot.max_point(),
136 });
137 }
138
139 *old_snapshot = new_snapshot;
140 (old_snapshot.clone(), tab_edits)
141 }
142}
143
144#[derive(Clone)]
145pub struct TabSnapshot {
146 pub fold_snapshot: FoldSnapshot,
147 pub tab_size: NonZeroU32,
148 pub max_expansion_column: u32,
149 pub version: usize,
150}
151
152impl TabSnapshot {
153 pub fn buffer_snapshot(&self) -> &MultiBufferSnapshot {
154 &self.fold_snapshot.inlay_snapshot.buffer
155 }
156
157 pub fn line_len(&self, row: u32) -> u32 {
158 let max_point = self.max_point();
159 if row < max_point.row() {
160 self.to_tab_point(FoldPoint::new(row, self.fold_snapshot.line_len(row)))
161 .0
162 .column
163 } else {
164 max_point.column()
165 }
166 }
167
168 pub fn text_summary(&self) -> TextSummary {
169 self.text_summary_for_range(TabPoint::zero()..self.max_point())
170 }
171
172 pub fn text_summary_for_range(&self, range: Range<TabPoint>) -> TextSummary {
173 let input_start = self.to_fold_point(range.start, Bias::Left).0;
174 let input_end = self.to_fold_point(range.end, Bias::Right).0;
175 let input_summary = self
176 .fold_snapshot
177 .text_summary_for_range(input_start..input_end);
178
179 let mut first_line_chars = 0;
180 let line_end = if range.start.row() == range.end.row() {
181 range.end
182 } else {
183 self.max_point()
184 };
185 for c in self
186 .chunks(range.start..line_end, false, None, None, None)
187 .flat_map(|chunk| chunk.text.chars())
188 {
189 if c == '\n' {
190 break;
191 }
192 first_line_chars += 1;
193 }
194
195 let mut last_line_chars = 0;
196 if range.start.row() == range.end.row() {
197 last_line_chars = first_line_chars;
198 } else {
199 for _ in self
200 .chunks(
201 TabPoint::new(range.end.row(), 0)..range.end,
202 false,
203 None,
204 None,
205 None,
206 )
207 .flat_map(|chunk| chunk.text.chars())
208 {
209 last_line_chars += 1;
210 }
211 }
212
213 TextSummary {
214 lines: range.end.0 - range.start.0,
215 first_line_chars,
216 last_line_chars,
217 longest_row: input_summary.longest_row,
218 longest_row_chars: input_summary.longest_row_chars,
219 }
220 }
221
222 pub fn chunks<'a>(
223 &'a self,
224 range: Range<TabPoint>,
225 language_aware: bool,
226 text_highlights: Option<&'a TextHighlights>,
227 hint_highlights: Option<HighlightStyle>,
228 suggestion_highlights: Option<HighlightStyle>,
229 ) -> TabChunks<'a> {
230 let (input_start, expanded_char_column, to_next_stop) =
231 self.to_fold_point(range.start, Bias::Left);
232 let input_column = input_start.column();
233 let input_start = input_start.to_offset(&self.fold_snapshot);
234 let input_end = self
235 .to_fold_point(range.end, Bias::Right)
236 .0
237 .to_offset(&self.fold_snapshot);
238 let to_next_stop = if range.start.0 + Point::new(0, to_next_stop) > range.end.0 {
239 range.end.column() - range.start.column()
240 } else {
241 to_next_stop
242 };
243
244 TabChunks {
245 fold_chunks: self.fold_snapshot.chunks(
246 input_start..input_end,
247 language_aware,
248 text_highlights,
249 hint_highlights,
250 suggestion_highlights,
251 ),
252 input_column,
253 column: expanded_char_column,
254 max_expansion_column: self.max_expansion_column,
255 output_position: range.start.0,
256 max_output_position: range.end.0,
257 tab_size: self.tab_size,
258 chunk: Chunk {
259 text: &SPACES[0..(to_next_stop as usize)],
260 is_tab: true,
261 ..Default::default()
262 },
263 inside_leading_tab: to_next_stop > 0,
264 }
265 }
266
267 pub fn buffer_rows(&self, row: u32) -> fold_map::FoldBufferRows<'_> {
268 self.fold_snapshot.buffer_rows(row)
269 }
270
271 #[cfg(test)]
272 pub fn text(&self) -> String {
273 self.chunks(TabPoint::zero()..self.max_point(), false, None, None, None)
274 .map(|chunk| chunk.text)
275 .collect()
276 }
277
278 pub fn max_point(&self) -> TabPoint {
279 self.to_tab_point(self.fold_snapshot.max_point())
280 }
281
282 pub fn clip_point(&self, point: TabPoint, bias: Bias) -> TabPoint {
283 self.to_tab_point(
284 self.fold_snapshot
285 .clip_point(self.to_fold_point(point, bias).0, bias),
286 )
287 }
288
289 pub fn to_tab_point(&self, input: FoldPoint) -> TabPoint {
290 let chars = self.fold_snapshot.chars_at(FoldPoint::new(input.row(), 0));
291 let expanded = self.expand_tabs(chars, input.column());
292 TabPoint::new(input.row(), expanded)
293 }
294
295 pub fn to_fold_point(&self, output: TabPoint, bias: Bias) -> (FoldPoint, u32, u32) {
296 let chars = self.fold_snapshot.chars_at(FoldPoint::new(output.row(), 0));
297 let expanded = output.column();
298 let (collapsed, expanded_char_column, to_next_stop) =
299 self.collapse_tabs(chars, expanded, bias);
300 (
301 FoldPoint::new(output.row(), collapsed as u32),
302 expanded_char_column,
303 to_next_stop,
304 )
305 }
306
307 pub fn make_tab_point(&self, point: Point, bias: Bias) -> TabPoint {
308 let inlay_point = self.fold_snapshot.inlay_snapshot.to_inlay_point(point);
309 let fold_point = self.fold_snapshot.to_fold_point(inlay_point, bias);
310 self.to_tab_point(fold_point)
311 }
312
313 pub fn to_point(&self, point: TabPoint, bias: Bias) -> Point {
314 let fold_point = self.to_fold_point(point, bias).0;
315 let inlay_point = fold_point.to_inlay_point(&self.fold_snapshot);
316 self.fold_snapshot
317 .inlay_snapshot
318 .to_buffer_point(inlay_point)
319 }
320
321 fn expand_tabs(&self, chars: impl Iterator<Item = char>, column: u32) -> u32 {
322 let tab_size = self.tab_size.get();
323
324 let mut expanded_chars = 0;
325 let mut expanded_bytes = 0;
326 let mut collapsed_bytes = 0;
327 let end_column = column.min(self.max_expansion_column);
328 for c in chars {
329 if collapsed_bytes >= end_column {
330 break;
331 }
332 if c == '\t' {
333 let tab_len = tab_size - expanded_chars % tab_size;
334 expanded_bytes += tab_len;
335 expanded_chars += tab_len;
336 } else {
337 expanded_bytes += c.len_utf8() as u32;
338 expanded_chars += 1;
339 }
340 collapsed_bytes += c.len_utf8() as u32;
341 }
342 expanded_bytes + column.saturating_sub(collapsed_bytes)
343 }
344
345 fn collapse_tabs(
346 &self,
347 chars: impl Iterator<Item = char>,
348 column: u32,
349 bias: Bias,
350 ) -> (u32, u32, u32) {
351 let tab_size = self.tab_size.get();
352
353 let mut expanded_bytes = 0;
354 let mut expanded_chars = 0;
355 let mut collapsed_bytes = 0;
356 for c in chars {
357 if expanded_bytes >= column {
358 break;
359 }
360 if collapsed_bytes >= self.max_expansion_column {
361 break;
362 }
363
364 if c == '\t' {
365 let tab_len = tab_size - (expanded_chars % tab_size);
366 expanded_chars += tab_len;
367 expanded_bytes += tab_len;
368 if expanded_bytes > column {
369 expanded_chars -= expanded_bytes - column;
370 return match bias {
371 Bias::Left => (collapsed_bytes, expanded_chars, expanded_bytes - column),
372 Bias::Right => (collapsed_bytes + 1, expanded_chars, 0),
373 };
374 }
375 } else {
376 expanded_chars += 1;
377 expanded_bytes += c.len_utf8() as u32;
378 }
379
380 if expanded_bytes > column && matches!(bias, Bias::Left) {
381 expanded_chars -= 1;
382 break;
383 }
384
385 collapsed_bytes += c.len_utf8() as u32;
386 }
387 (
388 collapsed_bytes + column.saturating_sub(expanded_bytes),
389 expanded_chars,
390 0,
391 )
392 }
393}
394
395#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
396pub struct TabPoint(pub Point);
397
398impl TabPoint {
399 pub fn new(row: u32, column: u32) -> Self {
400 Self(Point::new(row, column))
401 }
402
403 pub fn zero() -> Self {
404 Self::new(0, 0)
405 }
406
407 pub fn row(self) -> u32 {
408 self.0.row
409 }
410
411 pub fn column(self) -> u32 {
412 self.0.column
413 }
414}
415
416impl From<Point> for TabPoint {
417 fn from(point: Point) -> Self {
418 Self(point)
419 }
420}
421
422pub type TabEdit = text::Edit<TabPoint>;
423
424#[derive(Clone, Debug, Default, Eq, PartialEq)]
425pub struct TextSummary {
426 pub lines: Point,
427 pub first_line_chars: u32,
428 pub last_line_chars: u32,
429 pub longest_row: u32,
430 pub longest_row_chars: u32,
431}
432
433impl<'a> From<&'a str> for TextSummary {
434 fn from(text: &'a str) -> Self {
435 let sum = text::TextSummary::from(text);
436
437 TextSummary {
438 lines: sum.lines,
439 first_line_chars: sum.first_line_chars,
440 last_line_chars: sum.last_line_chars,
441 longest_row: sum.longest_row,
442 longest_row_chars: sum.longest_row_chars,
443 }
444 }
445}
446
447impl<'a> std::ops::AddAssign<&'a Self> for TextSummary {
448 fn add_assign(&mut self, other: &'a Self) {
449 let joined_chars = self.last_line_chars + other.first_line_chars;
450 if joined_chars > self.longest_row_chars {
451 self.longest_row = self.lines.row;
452 self.longest_row_chars = joined_chars;
453 }
454 if other.longest_row_chars > self.longest_row_chars {
455 self.longest_row = self.lines.row + other.longest_row;
456 self.longest_row_chars = other.longest_row_chars;
457 }
458
459 if self.lines.row == 0 {
460 self.first_line_chars += other.first_line_chars;
461 }
462
463 if other.lines.row == 0 {
464 self.last_line_chars += other.first_line_chars;
465 } else {
466 self.last_line_chars = other.last_line_chars;
467 }
468
469 self.lines += &other.lines;
470 }
471}
472
473// Handles a tab width <= 16
474const SPACES: &str = " ";
475
476pub struct TabChunks<'a> {
477 fold_chunks: FoldChunks<'a>,
478 chunk: Chunk<'a>,
479 column: u32,
480 max_expansion_column: u32,
481 output_position: Point,
482 input_column: u32,
483 max_output_position: Point,
484 tab_size: NonZeroU32,
485 inside_leading_tab: bool,
486}
487
488impl<'a> Iterator for TabChunks<'a> {
489 type Item = Chunk<'a>;
490
491 fn next(&mut self) -> Option<Self::Item> {
492 if self.chunk.text.is_empty() {
493 if let Some(chunk) = self.fold_chunks.next() {
494 self.chunk = chunk;
495 if self.inside_leading_tab {
496 self.chunk.text = &self.chunk.text[1..];
497 self.inside_leading_tab = false;
498 self.input_column += 1;
499 }
500 } else {
501 return None;
502 }
503 }
504
505 for (ix, c) in self.chunk.text.char_indices() {
506 match c {
507 '\t' => {
508 if ix > 0 {
509 let (prefix, suffix) = self.chunk.text.split_at(ix);
510 self.chunk.text = suffix;
511 return Some(Chunk {
512 text: prefix,
513 ..self.chunk
514 });
515 } else {
516 self.chunk.text = &self.chunk.text[1..];
517 let tab_size = if self.input_column < self.max_expansion_column {
518 self.tab_size.get() as u32
519 } else {
520 1
521 };
522 let mut len = tab_size - self.column % tab_size;
523 let next_output_position = cmp::min(
524 self.output_position + Point::new(0, len),
525 self.max_output_position,
526 );
527 len = next_output_position.column - self.output_position.column;
528 self.column += len;
529 self.input_column += 1;
530 self.output_position = next_output_position;
531 return Some(Chunk {
532 text: &SPACES[..len as usize],
533 is_tab: true,
534 ..self.chunk
535 });
536 }
537 }
538 '\n' => {
539 self.column = 0;
540 self.input_column = 0;
541 self.output_position += Point::new(1, 0);
542 }
543 _ => {
544 self.column += 1;
545 if !self.inside_leading_tab {
546 self.input_column += c.len_utf8() as u32;
547 }
548 self.output_position.column += c.len_utf8() as u32;
549 }
550 }
551 }
552
553 Some(mem::take(&mut self.chunk))
554 }
555}
556
557#[cfg(test)]
558mod tests {
559 use super::*;
560 use crate::{
561 display_map::{fold_map::FoldMap, inlay_map::InlayMap},
562 MultiBuffer,
563 };
564 use rand::{prelude::StdRng, Rng};
565
566 #[gpui::test]
567 fn test_expand_tabs(cx: &mut gpui::AppContext) {
568 let buffer = MultiBuffer::build_simple("", cx);
569 let buffer_snapshot = buffer.read(cx).snapshot(cx);
570 let (_, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
571 let (_, fold_snapshot) = FoldMap::new(inlay_snapshot);
572 let (_, tab_snapshot) = TabMap::new(fold_snapshot, 4.try_into().unwrap());
573
574 assert_eq!(tab_snapshot.expand_tabs("\t".chars(), 0), 0);
575 assert_eq!(tab_snapshot.expand_tabs("\t".chars(), 1), 4);
576 assert_eq!(tab_snapshot.expand_tabs("\ta".chars(), 2), 5);
577 }
578
579 #[gpui::test]
580 fn test_long_lines(cx: &mut gpui::AppContext) {
581 let max_expansion_column = 12;
582 let input = "A\tBC\tDEF\tG\tHI\tJ\tK\tL\tM";
583 let output = "A BC DEF G HI J K L M";
584
585 let buffer = MultiBuffer::build_simple(input, cx);
586 let buffer_snapshot = buffer.read(cx).snapshot(cx);
587 let (_, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
588 let (_, fold_snapshot) = FoldMap::new(inlay_snapshot);
589 let (_, mut tab_snapshot) = TabMap::new(fold_snapshot, 4.try_into().unwrap());
590
591 tab_snapshot.max_expansion_column = max_expansion_column;
592 assert_eq!(tab_snapshot.text(), output);
593
594 for (ix, c) in input.char_indices() {
595 assert_eq!(
596 tab_snapshot
597 .chunks(
598 TabPoint::new(0, ix as u32)..tab_snapshot.max_point(),
599 false,
600 None,
601 None,
602 None,
603 )
604 .map(|c| c.text)
605 .collect::<String>(),
606 &output[ix..],
607 "text from index {ix}"
608 );
609
610 if c != '\t' {
611 let input_point = Point::new(0, ix as u32);
612 let output_point = Point::new(0, output.find(c).unwrap() as u32);
613 assert_eq!(
614 tab_snapshot.to_tab_point(FoldPoint(input_point)),
615 TabPoint(output_point),
616 "to_tab_point({input_point:?})"
617 );
618 assert_eq!(
619 tab_snapshot
620 .to_fold_point(TabPoint(output_point), Bias::Left)
621 .0,
622 FoldPoint(input_point),
623 "to_fold_point({output_point:?})"
624 );
625 }
626 }
627 }
628
629 #[gpui::test]
630 fn test_long_lines_with_character_spanning_max_expansion_column(cx: &mut gpui::AppContext) {
631 let max_expansion_column = 8;
632 let input = "abcdefg⋯hij";
633
634 let buffer = MultiBuffer::build_simple(input, cx);
635 let buffer_snapshot = buffer.read(cx).snapshot(cx);
636 let (_, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
637 let (_, fold_snapshot) = FoldMap::new(inlay_snapshot);
638 let (_, mut tab_snapshot) = TabMap::new(fold_snapshot, 4.try_into().unwrap());
639
640 tab_snapshot.max_expansion_column = max_expansion_column;
641 assert_eq!(tab_snapshot.text(), input);
642 }
643
644 #[gpui::test]
645 fn test_marking_tabs(cx: &mut gpui::AppContext) {
646 let input = "\t \thello";
647
648 let buffer = MultiBuffer::build_simple(&input, cx);
649 let buffer_snapshot = buffer.read(cx).snapshot(cx);
650 let (_, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
651 let (_, fold_snapshot) = FoldMap::new(inlay_snapshot);
652 let (_, tab_snapshot) = TabMap::new(fold_snapshot, 4.try_into().unwrap());
653
654 assert_eq!(
655 chunks(&tab_snapshot, TabPoint::zero()),
656 vec![
657 (" ".to_string(), true),
658 (" ".to_string(), false),
659 (" ".to_string(), true),
660 ("hello".to_string(), false),
661 ]
662 );
663 assert_eq!(
664 chunks(&tab_snapshot, TabPoint::new(0, 2)),
665 vec![
666 (" ".to_string(), true),
667 (" ".to_string(), false),
668 (" ".to_string(), true),
669 ("hello".to_string(), false),
670 ]
671 );
672
673 fn chunks(snapshot: &TabSnapshot, start: TabPoint) -> Vec<(String, bool)> {
674 let mut chunks = Vec::new();
675 let mut was_tab = false;
676 let mut text = String::new();
677 for chunk in snapshot.chunks(start..snapshot.max_point(), false, None, None, None) {
678 if chunk.is_tab != was_tab {
679 if !text.is_empty() {
680 chunks.push((mem::take(&mut text), was_tab));
681 }
682 was_tab = chunk.is_tab;
683 }
684 text.push_str(chunk.text);
685 }
686
687 if !text.is_empty() {
688 chunks.push((text, was_tab));
689 }
690 chunks
691 }
692 }
693
694 #[gpui::test(iterations = 100)]
695 fn test_random_tabs(cx: &mut gpui::AppContext, mut rng: StdRng) {
696 let tab_size = NonZeroU32::new(rng.gen_range(1..=4)).unwrap();
697 let len = rng.gen_range(0..30);
698 let buffer = if rng.gen() {
699 let text = util::RandomCharIter::new(&mut rng)
700 .take(len)
701 .collect::<String>();
702 MultiBuffer::build_simple(&text, cx)
703 } else {
704 MultiBuffer::build_random(&mut rng, cx)
705 };
706 let buffer_snapshot = buffer.read(cx).snapshot(cx);
707 log::info!("Buffer text: {:?}", buffer_snapshot.text());
708
709 let (mut inlay_map, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
710 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
711 let (mut fold_map, _) = FoldMap::new(inlay_snapshot.clone());
712 fold_map.randomly_mutate(&mut rng);
713 let (fold_snapshot, _) = fold_map.read(inlay_snapshot, vec![]);
714 log::info!("FoldMap text: {:?}", fold_snapshot.text());
715 let (inlay_snapshot, _) = inlay_map.randomly_mutate(&mut 0, &mut rng);
716 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
717
718 let (mut tab_map, _) = TabMap::new(fold_snapshot.clone(), tab_size);
719 let tabs_snapshot = tab_map.set_max_expansion_column(32);
720
721 let text = text::Rope::from(tabs_snapshot.text().as_str());
722 log::info!(
723 "TabMap text (tab size: {}): {:?}",
724 tab_size,
725 tabs_snapshot.text(),
726 );
727
728 for _ in 0..5 {
729 let end_row = rng.gen_range(0..=text.max_point().row);
730 let end_column = rng.gen_range(0..=text.line_len(end_row));
731 let mut end = TabPoint(text.clip_point(Point::new(end_row, end_column), Bias::Right));
732 let start_row = rng.gen_range(0..=text.max_point().row);
733 let start_column = rng.gen_range(0..=text.line_len(start_row));
734 let mut start =
735 TabPoint(text.clip_point(Point::new(start_row, start_column), Bias::Left));
736 if start > end {
737 mem::swap(&mut start, &mut end);
738 }
739
740 let expected_text = text
741 .chunks_in_range(text.point_to_offset(start.0)..text.point_to_offset(end.0))
742 .collect::<String>();
743 let expected_summary = TextSummary::from(expected_text.as_str());
744 assert_eq!(
745 tabs_snapshot
746 .chunks(start..end, false, None, None, None)
747 .map(|c| c.text)
748 .collect::<String>(),
749 expected_text,
750 "chunks({:?}..{:?})",
751 start,
752 end
753 );
754
755 let mut actual_summary = tabs_snapshot.text_summary_for_range(start..end);
756 if tab_size.get() > 1 && inlay_snapshot.text().contains('\t') {
757 actual_summary.longest_row = expected_summary.longest_row;
758 actual_summary.longest_row_chars = expected_summary.longest_row_chars;
759 }
760 assert_eq!(actual_summary, expected_summary);
761 }
762
763 for row in 0..=text.max_point().row {
764 assert_eq!(
765 tabs_snapshot.line_len(row),
766 text.line_len(row),
767 "line_len({row})"
768 );
769 }
770 }
771}