1use super::{
2 fold_map::FoldBufferRows,
3 tab_map::{self, TabEdit, TabPoint, TabSnapshot},
4 Highlights,
5};
6use gpui::{AppContext, Context, Font, LineWrapper, Model, ModelContext, Pixels, Task};
7use language::{Chunk, Point};
8use lazy_static::lazy_static;
9use multi_buffer::MultiBufferSnapshot;
10use smol::future::yield_now;
11use std::{cmp, collections::VecDeque, mem, ops::Range, time::Duration};
12use sum_tree::{Bias, Cursor, SumTree};
13use text::Patch;
14
15pub use super::tab_map::TextSummary;
16pub type WrapEdit = text::Edit<u32>;
17
18/// Handles soft wrapping of text.
19///
20/// See the [`display_map` module documentation](crate::display_map) for more information.
21pub struct WrapMap {
22 snapshot: WrapSnapshot,
23 pending_edits: VecDeque<(TabSnapshot, Vec<TabEdit>)>,
24 interpolated_edits: Patch<u32>,
25 edits_since_sync: Patch<u32>,
26 wrap_width: Option<Pixels>,
27 background_task: Option<Task<()>>,
28 font_with_size: (Font, Pixels),
29}
30
31#[derive(Clone)]
32pub struct WrapSnapshot {
33 tab_snapshot: TabSnapshot,
34 transforms: SumTree<Transform>,
35 interpolated: bool,
36}
37
38#[derive(Clone, Debug, Default, Eq, PartialEq)]
39struct Transform {
40 summary: TransformSummary,
41 display_text: Option<&'static str>,
42}
43
44#[derive(Clone, Debug, Default, Eq, PartialEq)]
45struct TransformSummary {
46 input: TextSummary,
47 output: TextSummary,
48}
49
50#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
51pub struct WrapPoint(pub Point);
52
53pub struct WrapChunks<'a> {
54 input_chunks: tab_map::TabChunks<'a>,
55 input_chunk: Chunk<'a>,
56 output_position: WrapPoint,
57 max_output_row: u32,
58 transforms: Cursor<'a, Transform, (WrapPoint, TabPoint)>,
59}
60
61#[derive(Clone)]
62pub struct WrapBufferRows<'a> {
63 input_buffer_rows: FoldBufferRows<'a>,
64 input_buffer_row: Option<u32>,
65 output_row: u32,
66 soft_wrapped: bool,
67 max_output_row: u32,
68 transforms: Cursor<'a, Transform, (WrapPoint, TabPoint)>,
69}
70
71impl WrapMap {
72 pub fn new(
73 tab_snapshot: TabSnapshot,
74 font: Font,
75 font_size: Pixels,
76 wrap_width: Option<Pixels>,
77 cx: &mut AppContext,
78 ) -> (Model<Self>, WrapSnapshot) {
79 let handle = cx.new_model(|cx| {
80 let mut this = Self {
81 font_with_size: (font, font_size),
82 wrap_width: None,
83 pending_edits: Default::default(),
84 interpolated_edits: Default::default(),
85 edits_since_sync: Default::default(),
86 snapshot: WrapSnapshot::new(tab_snapshot),
87 background_task: None,
88 };
89 this.set_wrap_width(wrap_width, cx);
90 mem::take(&mut this.edits_since_sync);
91 this
92 });
93 let snapshot = handle.read(cx).snapshot.clone();
94 (handle, snapshot)
95 }
96
97 #[cfg(test)]
98 pub fn is_rewrapping(&self) -> bool {
99 self.background_task.is_some()
100 }
101
102 pub fn sync(
103 &mut self,
104 tab_snapshot: TabSnapshot,
105 edits: Vec<TabEdit>,
106 cx: &mut ModelContext<Self>,
107 ) -> (WrapSnapshot, Patch<u32>) {
108 if self.wrap_width.is_some() {
109 self.pending_edits.push_back((tab_snapshot, edits));
110 self.flush_edits(cx);
111 } else {
112 self.edits_since_sync = self
113 .edits_since_sync
114 .compose(&self.snapshot.interpolate(tab_snapshot, &edits));
115 self.snapshot.interpolated = false;
116 }
117
118 (self.snapshot.clone(), mem::take(&mut self.edits_since_sync))
119 }
120
121 pub fn set_font_with_size(
122 &mut self,
123 font: Font,
124 font_size: Pixels,
125 cx: &mut ModelContext<Self>,
126 ) -> bool {
127 let font_with_size = (font, font_size);
128
129 if font_with_size == self.font_with_size {
130 false
131 } else {
132 self.font_with_size = font_with_size;
133 self.rewrap(cx);
134 true
135 }
136 }
137
138 pub fn set_wrap_width(
139 &mut self,
140 wrap_width: Option<Pixels>,
141 cx: &mut ModelContext<Self>,
142 ) -> bool {
143 if wrap_width == self.wrap_width {
144 return false;
145 }
146
147 self.wrap_width = wrap_width;
148 self.rewrap(cx);
149 true
150 }
151
152 fn rewrap(&mut self, cx: &mut ModelContext<Self>) {
153 self.background_task.take();
154 self.interpolated_edits.clear();
155 self.pending_edits.clear();
156
157 if let Some(wrap_width) = self.wrap_width {
158 let mut new_snapshot = self.snapshot.clone();
159
160 let text_system = cx.text_system().clone();
161 let (font, font_size) = self.font_with_size.clone();
162 let task = cx.background_executor().spawn(async move {
163 let mut line_wrapper = text_system.line_wrapper(font, font_size);
164 let tab_snapshot = new_snapshot.tab_snapshot.clone();
165 let range = TabPoint::zero()..tab_snapshot.max_point();
166 let edits = new_snapshot
167 .update(
168 tab_snapshot,
169 &[TabEdit {
170 old: range.clone(),
171 new: range.clone(),
172 }],
173 wrap_width,
174 &mut line_wrapper,
175 )
176 .await;
177 (new_snapshot, edits)
178 });
179
180 match cx
181 .background_executor()
182 .block_with_timeout(Duration::from_millis(5), task)
183 {
184 Ok((snapshot, edits)) => {
185 self.snapshot = snapshot;
186 self.edits_since_sync = self.edits_since_sync.compose(&edits);
187 }
188 Err(wrap_task) => {
189 self.background_task = Some(cx.spawn(|this, mut cx| async move {
190 let (snapshot, edits) = wrap_task.await;
191 this.update(&mut cx, |this, cx| {
192 this.snapshot = snapshot;
193 this.edits_since_sync = this
194 .edits_since_sync
195 .compose(mem::take(&mut this.interpolated_edits).invert())
196 .compose(&edits);
197 this.background_task = None;
198 this.flush_edits(cx);
199 cx.notify();
200 })
201 .ok();
202 }));
203 }
204 }
205 } else {
206 let old_rows = self.snapshot.transforms.summary().output.lines.row + 1;
207 self.snapshot.transforms = SumTree::new();
208 let summary = self.snapshot.tab_snapshot.text_summary();
209 if !summary.lines.is_zero() {
210 self.snapshot
211 .transforms
212 .push(Transform::isomorphic(summary), &());
213 }
214 let new_rows = self.snapshot.transforms.summary().output.lines.row + 1;
215 self.snapshot.interpolated = false;
216 self.edits_since_sync = self.edits_since_sync.compose(&Patch::new(vec![WrapEdit {
217 old: 0..old_rows,
218 new: 0..new_rows,
219 }]));
220 }
221 }
222
223 fn flush_edits(&mut self, cx: &mut ModelContext<Self>) {
224 if !self.snapshot.interpolated {
225 let mut to_remove_len = 0;
226 for (tab_snapshot, _) in &self.pending_edits {
227 if tab_snapshot.version <= self.snapshot.tab_snapshot.version {
228 to_remove_len += 1;
229 } else {
230 break;
231 }
232 }
233 self.pending_edits.drain(..to_remove_len);
234 }
235
236 if self.pending_edits.is_empty() {
237 return;
238 }
239
240 if let Some(wrap_width) = self.wrap_width {
241 if self.background_task.is_none() {
242 let pending_edits = self.pending_edits.clone();
243 let mut snapshot = self.snapshot.clone();
244 let text_system = cx.text_system().clone();
245 let (font, font_size) = self.font_with_size.clone();
246 let update_task = cx.background_executor().spawn(async move {
247 let mut edits = Patch::default();
248 let mut line_wrapper = text_system.line_wrapper(font, font_size);
249 for (tab_snapshot, tab_edits) in pending_edits {
250 let wrap_edits = snapshot
251 .update(tab_snapshot, &tab_edits, wrap_width, &mut line_wrapper)
252 .await;
253 edits = edits.compose(&wrap_edits);
254 }
255 (snapshot, edits)
256 });
257
258 match cx
259 .background_executor()
260 .block_with_timeout(Duration::from_millis(1), update_task)
261 {
262 Ok((snapshot, output_edits)) => {
263 self.snapshot = snapshot;
264 self.edits_since_sync = self.edits_since_sync.compose(&output_edits);
265 }
266 Err(update_task) => {
267 self.background_task = Some(cx.spawn(|this, mut cx| async move {
268 let (snapshot, edits) = update_task.await;
269 this.update(&mut cx, |this, cx| {
270 this.snapshot = snapshot;
271 this.edits_since_sync = this
272 .edits_since_sync
273 .compose(mem::take(&mut this.interpolated_edits).invert())
274 .compose(&edits);
275 this.background_task = None;
276 this.flush_edits(cx);
277 cx.notify();
278 })
279 .ok();
280 }));
281 }
282 }
283 }
284 }
285
286 let was_interpolated = self.snapshot.interpolated;
287 let mut to_remove_len = 0;
288 for (tab_snapshot, edits) in &self.pending_edits {
289 if tab_snapshot.version <= self.snapshot.tab_snapshot.version {
290 to_remove_len += 1;
291 } else {
292 let interpolated_edits = self.snapshot.interpolate(tab_snapshot.clone(), edits);
293 self.edits_since_sync = self.edits_since_sync.compose(&interpolated_edits);
294 self.interpolated_edits = self.interpolated_edits.compose(&interpolated_edits);
295 }
296 }
297
298 if !was_interpolated {
299 self.pending_edits.drain(..to_remove_len);
300 }
301 }
302}
303
304impl WrapSnapshot {
305 fn new(tab_snapshot: TabSnapshot) -> Self {
306 let mut transforms = SumTree::new();
307 let extent = tab_snapshot.text_summary();
308 if !extent.lines.is_zero() {
309 transforms.push(Transform::isomorphic(extent), &());
310 }
311 Self {
312 transforms,
313 tab_snapshot,
314 interpolated: true,
315 }
316 }
317
318 pub fn buffer_snapshot(&self) -> &MultiBufferSnapshot {
319 self.tab_snapshot.buffer_snapshot()
320 }
321
322 fn interpolate(&mut self, new_tab_snapshot: TabSnapshot, tab_edits: &[TabEdit]) -> Patch<u32> {
323 let mut new_transforms;
324 if tab_edits.is_empty() {
325 new_transforms = self.transforms.clone();
326 } else {
327 let mut old_cursor = self.transforms.cursor::<TabPoint>();
328
329 let mut tab_edits_iter = tab_edits.iter().peekable();
330 new_transforms =
331 old_cursor.slice(&tab_edits_iter.peek().unwrap().old.start, Bias::Right, &());
332
333 while let Some(edit) = tab_edits_iter.next() {
334 if edit.new.start > TabPoint::from(new_transforms.summary().input.lines) {
335 let summary = new_tab_snapshot.text_summary_for_range(
336 TabPoint::from(new_transforms.summary().input.lines)..edit.new.start,
337 );
338 new_transforms.push_or_extend(Transform::isomorphic(summary));
339 }
340
341 if !edit.new.is_empty() {
342 new_transforms.push_or_extend(Transform::isomorphic(
343 new_tab_snapshot.text_summary_for_range(edit.new.clone()),
344 ));
345 }
346
347 old_cursor.seek_forward(&edit.old.end, Bias::Right, &());
348 if let Some(next_edit) = tab_edits_iter.peek() {
349 if next_edit.old.start > old_cursor.end(&()) {
350 if old_cursor.end(&()) > edit.old.end {
351 let summary = self
352 .tab_snapshot
353 .text_summary_for_range(edit.old.end..old_cursor.end(&()));
354 new_transforms.push_or_extend(Transform::isomorphic(summary));
355 }
356
357 old_cursor.next(&());
358 new_transforms.append(
359 old_cursor.slice(&next_edit.old.start, Bias::Right, &()),
360 &(),
361 );
362 }
363 } else {
364 if old_cursor.end(&()) > edit.old.end {
365 let summary = self
366 .tab_snapshot
367 .text_summary_for_range(edit.old.end..old_cursor.end(&()));
368 new_transforms.push_or_extend(Transform::isomorphic(summary));
369 }
370 old_cursor.next(&());
371 new_transforms.append(old_cursor.suffix(&()), &());
372 }
373 }
374 }
375
376 let old_snapshot = mem::replace(
377 self,
378 WrapSnapshot {
379 tab_snapshot: new_tab_snapshot,
380 transforms: new_transforms,
381 interpolated: true,
382 },
383 );
384 self.check_invariants();
385 old_snapshot.compute_edits(tab_edits, self)
386 }
387
388 async fn update(
389 &mut self,
390 new_tab_snapshot: TabSnapshot,
391 tab_edits: &[TabEdit],
392 wrap_width: Pixels,
393 line_wrapper: &mut LineWrapper,
394 ) -> Patch<u32> {
395 #[derive(Debug)]
396 struct RowEdit {
397 old_rows: Range<u32>,
398 new_rows: Range<u32>,
399 }
400
401 let mut tab_edits_iter = tab_edits.iter().peekable();
402 let mut row_edits = Vec::new();
403 while let Some(edit) = tab_edits_iter.next() {
404 let mut row_edit = RowEdit {
405 old_rows: edit.old.start.row()..edit.old.end.row() + 1,
406 new_rows: edit.new.start.row()..edit.new.end.row() + 1,
407 };
408
409 while let Some(next_edit) = tab_edits_iter.peek() {
410 if next_edit.old.start.row() <= row_edit.old_rows.end {
411 row_edit.old_rows.end = next_edit.old.end.row() + 1;
412 row_edit.new_rows.end = next_edit.new.end.row() + 1;
413 tab_edits_iter.next();
414 } else {
415 break;
416 }
417 }
418
419 row_edits.push(row_edit);
420 }
421
422 let mut new_transforms;
423 if row_edits.is_empty() {
424 new_transforms = self.transforms.clone();
425 } else {
426 let mut row_edits = row_edits.into_iter().peekable();
427 let mut old_cursor = self.transforms.cursor::<TabPoint>();
428
429 new_transforms = old_cursor.slice(
430 &TabPoint::new(row_edits.peek().unwrap().old_rows.start, 0),
431 Bias::Right,
432 &(),
433 );
434
435 while let Some(edit) = row_edits.next() {
436 if edit.new_rows.start > new_transforms.summary().input.lines.row {
437 let summary = new_tab_snapshot.text_summary_for_range(
438 TabPoint(new_transforms.summary().input.lines)
439 ..TabPoint::new(edit.new_rows.start, 0),
440 );
441 new_transforms.push_or_extend(Transform::isomorphic(summary));
442 }
443
444 let mut line = String::new();
445 let mut remaining = None;
446 let mut chunks = new_tab_snapshot.chunks(
447 TabPoint::new(edit.new_rows.start, 0)..new_tab_snapshot.max_point(),
448 false,
449 Highlights::default(),
450 );
451 let mut edit_transforms = Vec::<Transform>::new();
452 for _ in edit.new_rows.start..edit.new_rows.end {
453 while let Some(chunk) =
454 remaining.take().or_else(|| chunks.next().map(|c| c.text))
455 {
456 if let Some(ix) = chunk.find('\n') {
457 line.push_str(&chunk[..ix + 1]);
458 remaining = Some(&chunk[ix + 1..]);
459 break;
460 } else {
461 line.push_str(chunk)
462 }
463 }
464
465 if line.is_empty() {
466 break;
467 }
468
469 let mut prev_boundary_ix = 0;
470 for boundary in line_wrapper.wrap_line(&line, wrap_width) {
471 let wrapped = &line[prev_boundary_ix..boundary.ix];
472 push_isomorphic(&mut edit_transforms, TextSummary::from(wrapped));
473 edit_transforms.push(Transform::wrap(boundary.next_indent));
474 prev_boundary_ix = boundary.ix;
475 }
476
477 if prev_boundary_ix < line.len() {
478 push_isomorphic(
479 &mut edit_transforms,
480 TextSummary::from(&line[prev_boundary_ix..]),
481 );
482 }
483
484 line.clear();
485 yield_now().await;
486 }
487
488 let mut edit_transforms = edit_transforms.into_iter();
489 if let Some(transform) = edit_transforms.next() {
490 new_transforms.push_or_extend(transform);
491 }
492 new_transforms.extend(edit_transforms, &());
493
494 old_cursor.seek_forward(&TabPoint::new(edit.old_rows.end, 0), Bias::Right, &());
495 if let Some(next_edit) = row_edits.peek() {
496 if next_edit.old_rows.start > old_cursor.end(&()).row() {
497 if old_cursor.end(&()) > TabPoint::new(edit.old_rows.end, 0) {
498 let summary = self.tab_snapshot.text_summary_for_range(
499 TabPoint::new(edit.old_rows.end, 0)..old_cursor.end(&()),
500 );
501 new_transforms.push_or_extend(Transform::isomorphic(summary));
502 }
503 old_cursor.next(&());
504 new_transforms.append(
505 old_cursor.slice(
506 &TabPoint::new(next_edit.old_rows.start, 0),
507 Bias::Right,
508 &(),
509 ),
510 &(),
511 );
512 }
513 } else {
514 if old_cursor.end(&()) > TabPoint::new(edit.old_rows.end, 0) {
515 let summary = self.tab_snapshot.text_summary_for_range(
516 TabPoint::new(edit.old_rows.end, 0)..old_cursor.end(&()),
517 );
518 new_transforms.push_or_extend(Transform::isomorphic(summary));
519 }
520 old_cursor.next(&());
521 new_transforms.append(old_cursor.suffix(&()), &());
522 }
523 }
524 }
525
526 let old_snapshot = mem::replace(
527 self,
528 WrapSnapshot {
529 tab_snapshot: new_tab_snapshot,
530 transforms: new_transforms,
531 interpolated: false,
532 },
533 );
534 self.check_invariants();
535 old_snapshot.compute_edits(tab_edits, self)
536 }
537
538 fn compute_edits(&self, tab_edits: &[TabEdit], new_snapshot: &WrapSnapshot) -> Patch<u32> {
539 let mut wrap_edits = Vec::new();
540 let mut old_cursor = self.transforms.cursor::<TransformSummary>();
541 let mut new_cursor = new_snapshot.transforms.cursor::<TransformSummary>();
542 for mut tab_edit in tab_edits.iter().cloned() {
543 tab_edit.old.start.0.column = 0;
544 tab_edit.old.end.0 += Point::new(1, 0);
545 tab_edit.new.start.0.column = 0;
546 tab_edit.new.end.0 += Point::new(1, 0);
547
548 old_cursor.seek(&tab_edit.old.start, Bias::Right, &());
549 let mut old_start = old_cursor.start().output.lines;
550 old_start += tab_edit.old.start.0 - old_cursor.start().input.lines;
551
552 old_cursor.seek(&tab_edit.old.end, Bias::Right, &());
553 let mut old_end = old_cursor.start().output.lines;
554 old_end += tab_edit.old.end.0 - old_cursor.start().input.lines;
555
556 new_cursor.seek(&tab_edit.new.start, Bias::Right, &());
557 let mut new_start = new_cursor.start().output.lines;
558 new_start += tab_edit.new.start.0 - new_cursor.start().input.lines;
559
560 new_cursor.seek(&tab_edit.new.end, Bias::Right, &());
561 let mut new_end = new_cursor.start().output.lines;
562 new_end += tab_edit.new.end.0 - new_cursor.start().input.lines;
563
564 wrap_edits.push(WrapEdit {
565 old: old_start.row..old_end.row,
566 new: new_start.row..new_end.row,
567 });
568 }
569
570 wrap_edits = consolidate_wrap_edits(wrap_edits);
571 Patch::new(wrap_edits)
572 }
573
574 pub(crate) fn chunks<'a>(
575 &'a self,
576 rows: Range<u32>,
577 language_aware: bool,
578 highlights: Highlights<'a>,
579 ) -> WrapChunks<'a> {
580 let output_start = WrapPoint::new(rows.start, 0);
581 let output_end = WrapPoint::new(rows.end, 0);
582 let mut transforms = self.transforms.cursor::<(WrapPoint, TabPoint)>();
583 transforms.seek(&output_start, Bias::Right, &());
584 let mut input_start = TabPoint(transforms.start().1 .0);
585 if transforms.item().map_or(false, |t| t.is_isomorphic()) {
586 input_start.0 += output_start.0 - transforms.start().0 .0;
587 }
588 let input_end = self
589 .to_tab_point(output_end)
590 .min(self.tab_snapshot.max_point());
591 WrapChunks {
592 input_chunks: self.tab_snapshot.chunks(
593 input_start..input_end,
594 language_aware,
595 highlights,
596 ),
597 input_chunk: Default::default(),
598 output_position: output_start,
599 max_output_row: rows.end,
600 transforms,
601 }
602 }
603
604 pub fn max_point(&self) -> WrapPoint {
605 WrapPoint(self.transforms.summary().output.lines)
606 }
607
608 pub fn line_len(&self, row: u32) -> u32 {
609 let mut cursor = self.transforms.cursor::<(WrapPoint, TabPoint)>();
610 cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Left, &());
611 if cursor
612 .item()
613 .map_or(false, |transform| transform.is_isomorphic())
614 {
615 let overshoot = row - cursor.start().0.row();
616 let tab_row = cursor.start().1.row() + overshoot;
617 let tab_line_len = self.tab_snapshot.line_len(tab_row);
618 if overshoot == 0 {
619 cursor.start().0.column() + (tab_line_len - cursor.start().1.column())
620 } else {
621 tab_line_len
622 }
623 } else {
624 cursor.start().0.column()
625 }
626 }
627
628 pub fn soft_wrap_indent(&self, row: u32) -> Option<u32> {
629 let mut cursor = self.transforms.cursor::<WrapPoint>();
630 cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Right, &());
631 cursor.item().and_then(|transform| {
632 if transform.is_isomorphic() {
633 None
634 } else {
635 Some(transform.summary.output.lines.column)
636 }
637 })
638 }
639
640 pub fn longest_row(&self) -> u32 {
641 self.transforms.summary().output.longest_row
642 }
643
644 pub fn buffer_rows(&self, start_row: u32) -> WrapBufferRows {
645 let mut transforms = self.transforms.cursor::<(WrapPoint, TabPoint)>();
646 transforms.seek(&WrapPoint::new(start_row, 0), Bias::Left, &());
647 let mut input_row = transforms.start().1.row();
648 if transforms.item().map_or(false, |t| t.is_isomorphic()) {
649 input_row += start_row - transforms.start().0.row();
650 }
651 let soft_wrapped = transforms.item().map_or(false, |t| !t.is_isomorphic());
652 let mut input_buffer_rows = self.tab_snapshot.buffer_rows(input_row);
653 let input_buffer_row = input_buffer_rows.next().unwrap();
654 WrapBufferRows {
655 transforms,
656 input_buffer_row,
657 input_buffer_rows,
658 output_row: start_row,
659 soft_wrapped,
660 max_output_row: self.max_point().row(),
661 }
662 }
663
664 pub fn to_tab_point(&self, point: WrapPoint) -> TabPoint {
665 let mut cursor = self.transforms.cursor::<(WrapPoint, TabPoint)>();
666 cursor.seek(&point, Bias::Right, &());
667 let mut tab_point = cursor.start().1 .0;
668 if cursor.item().map_or(false, |t| t.is_isomorphic()) {
669 tab_point += point.0 - cursor.start().0 .0;
670 }
671 TabPoint(tab_point)
672 }
673
674 pub fn to_point(&self, point: WrapPoint, bias: Bias) -> Point {
675 self.tab_snapshot.to_point(self.to_tab_point(point), bias)
676 }
677
678 pub fn make_wrap_point(&self, point: Point, bias: Bias) -> WrapPoint {
679 self.tab_point_to_wrap_point(self.tab_snapshot.make_tab_point(point, bias))
680 }
681
682 pub fn tab_point_to_wrap_point(&self, point: TabPoint) -> WrapPoint {
683 let mut cursor = self.transforms.cursor::<(TabPoint, WrapPoint)>();
684 cursor.seek(&point, Bias::Right, &());
685 WrapPoint(cursor.start().1 .0 + (point.0 - cursor.start().0 .0))
686 }
687
688 pub fn clip_point(&self, mut point: WrapPoint, bias: Bias) -> WrapPoint {
689 if bias == Bias::Left {
690 let mut cursor = self.transforms.cursor::<WrapPoint>();
691 cursor.seek(&point, Bias::Right, &());
692 if cursor.item().map_or(false, |t| !t.is_isomorphic()) {
693 point = *cursor.start();
694 *point.column_mut() -= 1;
695 }
696 }
697
698 self.tab_point_to_wrap_point(self.tab_snapshot.clip_point(self.to_tab_point(point), bias))
699 }
700
701 pub fn prev_row_boundary(&self, mut point: WrapPoint) -> u32 {
702 if self.transforms.is_empty() {
703 return 0;
704 }
705
706 *point.column_mut() = 0;
707
708 let mut cursor = self.transforms.cursor::<(WrapPoint, TabPoint)>();
709 cursor.seek(&point, Bias::Right, &());
710 if cursor.item().is_none() {
711 cursor.prev(&());
712 }
713
714 while let Some(transform) = cursor.item() {
715 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
716 return cmp::min(cursor.end(&()).0.row(), point.row());
717 } else {
718 cursor.prev(&());
719 }
720 }
721
722 unreachable!()
723 }
724
725 pub fn next_row_boundary(&self, mut point: WrapPoint) -> Option<u32> {
726 point.0 += Point::new(1, 0);
727
728 let mut cursor = self.transforms.cursor::<(WrapPoint, TabPoint)>();
729 cursor.seek(&point, Bias::Right, &());
730 while let Some(transform) = cursor.item() {
731 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
732 return Some(cmp::max(cursor.start().0.row(), point.row()));
733 } else {
734 cursor.next(&());
735 }
736 }
737
738 None
739 }
740
741 fn check_invariants(&self) {
742 #[cfg(test)]
743 {
744 assert_eq!(
745 TabPoint::from(self.transforms.summary().input.lines),
746 self.tab_snapshot.max_point()
747 );
748
749 {
750 let mut transforms = self.transforms.cursor::<()>().peekable();
751 while let Some(transform) = transforms.next() {
752 if let Some(next_transform) = transforms.peek() {
753 assert!(transform.is_isomorphic() != next_transform.is_isomorphic());
754 }
755 }
756 }
757
758 let text = language::Rope::from(self.text().as_str());
759 let mut input_buffer_rows = self.tab_snapshot.buffer_rows(0);
760 let mut expected_buffer_rows = Vec::new();
761 let mut prev_tab_row = 0;
762 for display_row in 0..=self.max_point().row() {
763 let tab_point = self.to_tab_point(WrapPoint::new(display_row, 0));
764 if tab_point.row() == prev_tab_row && display_row != 0 {
765 expected_buffer_rows.push(None);
766 } else {
767 expected_buffer_rows.push(input_buffer_rows.next().unwrap());
768 }
769
770 prev_tab_row = tab_point.row();
771 assert_eq!(self.line_len(display_row), text.line_len(display_row));
772 }
773
774 for start_display_row in 0..expected_buffer_rows.len() {
775 assert_eq!(
776 self.buffer_rows(start_display_row as u32)
777 .collect::<Vec<_>>(),
778 &expected_buffer_rows[start_display_row..],
779 "invalid buffer_rows({}..)",
780 start_display_row
781 );
782 }
783 }
784 }
785}
786
787impl<'a> Iterator for WrapChunks<'a> {
788 type Item = Chunk<'a>;
789
790 fn next(&mut self) -> Option<Self::Item> {
791 if self.output_position.row() >= self.max_output_row {
792 return None;
793 }
794
795 let transform = self.transforms.item()?;
796 if let Some(display_text) = transform.display_text {
797 let mut start_ix = 0;
798 let mut end_ix = display_text.len();
799 let mut summary = transform.summary.output.lines;
800
801 if self.output_position > self.transforms.start().0 {
802 // Exclude newline starting prior to the desired row.
803 start_ix = 1;
804 summary.row = 0;
805 } else if self.output_position.row() + 1 >= self.max_output_row {
806 // Exclude soft indentation ending after the desired row.
807 end_ix = 1;
808 summary.column = 0;
809 }
810
811 self.output_position.0 += summary;
812 self.transforms.next(&());
813 return Some(Chunk {
814 text: &display_text[start_ix..end_ix],
815 ..self.input_chunk.clone()
816 });
817 }
818
819 if self.input_chunk.text.is_empty() {
820 self.input_chunk = self.input_chunks.next().unwrap();
821 }
822
823 let mut input_len = 0;
824 let transform_end = self.transforms.end(&()).0;
825 for c in self.input_chunk.text.chars() {
826 let char_len = c.len_utf8();
827 input_len += char_len;
828 if c == '\n' {
829 *self.output_position.row_mut() += 1;
830 *self.output_position.column_mut() = 0;
831 } else {
832 *self.output_position.column_mut() += char_len as u32;
833 }
834
835 if self.output_position >= transform_end {
836 self.transforms.next(&());
837 break;
838 }
839 }
840
841 let (prefix, suffix) = self.input_chunk.text.split_at(input_len);
842 self.input_chunk.text = suffix;
843 Some(Chunk {
844 text: prefix,
845 ..self.input_chunk.clone()
846 })
847 }
848}
849
850impl<'a> Iterator for WrapBufferRows<'a> {
851 type Item = Option<u32>;
852
853 fn next(&mut self) -> Option<Self::Item> {
854 if self.output_row > self.max_output_row {
855 return None;
856 }
857
858 let buffer_row = self.input_buffer_row;
859 let soft_wrapped = self.soft_wrapped;
860
861 self.output_row += 1;
862 self.transforms
863 .seek_forward(&WrapPoint::new(self.output_row, 0), Bias::Left, &());
864 if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
865 self.input_buffer_row = self.input_buffer_rows.next().unwrap();
866 self.soft_wrapped = false;
867 } else {
868 self.soft_wrapped = true;
869 }
870
871 Some(if soft_wrapped { None } else { buffer_row })
872 }
873}
874
875impl Transform {
876 fn isomorphic(summary: TextSummary) -> Self {
877 #[cfg(test)]
878 assert!(!summary.lines.is_zero());
879
880 Self {
881 summary: TransformSummary {
882 input: summary.clone(),
883 output: summary,
884 },
885 display_text: None,
886 }
887 }
888
889 fn wrap(indent: u32) -> Self {
890 lazy_static! {
891 static ref WRAP_TEXT: String = {
892 let mut wrap_text = String::new();
893 wrap_text.push('\n');
894 wrap_text.extend((0..LineWrapper::MAX_INDENT as usize).map(|_| ' '));
895 wrap_text
896 };
897 }
898
899 Self {
900 summary: TransformSummary {
901 input: TextSummary::default(),
902 output: TextSummary {
903 lines: Point::new(1, indent),
904 first_line_chars: 0,
905 last_line_chars: indent,
906 longest_row: 1,
907 longest_row_chars: indent,
908 },
909 },
910 display_text: Some(&WRAP_TEXT[..1 + indent as usize]),
911 }
912 }
913
914 fn is_isomorphic(&self) -> bool {
915 self.display_text.is_none()
916 }
917}
918
919impl sum_tree::Item for Transform {
920 type Summary = TransformSummary;
921
922 fn summary(&self) -> Self::Summary {
923 self.summary.clone()
924 }
925}
926
927fn push_isomorphic(transforms: &mut Vec<Transform>, summary: TextSummary) {
928 if let Some(last_transform) = transforms.last_mut() {
929 if last_transform.is_isomorphic() {
930 last_transform.summary.input += &summary;
931 last_transform.summary.output += &summary;
932 return;
933 }
934 }
935 transforms.push(Transform::isomorphic(summary));
936}
937
938trait SumTreeExt {
939 fn push_or_extend(&mut self, transform: Transform);
940}
941
942impl SumTreeExt for SumTree<Transform> {
943 fn push_or_extend(&mut self, transform: Transform) {
944 let mut transform = Some(transform);
945 self.update_last(
946 |last_transform| {
947 if last_transform.is_isomorphic() && transform.as_ref().unwrap().is_isomorphic() {
948 let transform = transform.take().unwrap();
949 last_transform.summary.input += &transform.summary.input;
950 last_transform.summary.output += &transform.summary.output;
951 }
952 },
953 &(),
954 );
955
956 if let Some(transform) = transform {
957 self.push(transform, &());
958 }
959 }
960}
961
962impl WrapPoint {
963 pub fn new(row: u32, column: u32) -> Self {
964 Self(Point::new(row, column))
965 }
966
967 pub fn row(self) -> u32 {
968 self.0.row
969 }
970
971 pub fn row_mut(&mut self) -> &mut u32 {
972 &mut self.0.row
973 }
974
975 pub fn column(self) -> u32 {
976 self.0.column
977 }
978
979 pub fn column_mut(&mut self) -> &mut u32 {
980 &mut self.0.column
981 }
982}
983
984impl sum_tree::Summary for TransformSummary {
985 type Context = ();
986
987 fn add_summary(&mut self, other: &Self, _: &()) {
988 self.input += &other.input;
989 self.output += &other.output;
990 }
991}
992
993impl<'a> sum_tree::Dimension<'a, TransformSummary> for TabPoint {
994 fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
995 self.0 += summary.input.lines;
996 }
997}
998
999impl<'a> sum_tree::SeekTarget<'a, TransformSummary, TransformSummary> for TabPoint {
1000 fn cmp(&self, cursor_location: &TransformSummary, _: &()) -> std::cmp::Ordering {
1001 Ord::cmp(&self.0, &cursor_location.input.lines)
1002 }
1003}
1004
1005impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapPoint {
1006 fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
1007 self.0 += summary.output.lines;
1008 }
1009}
1010
1011fn consolidate_wrap_edits(edits: Vec<WrapEdit>) -> Vec<WrapEdit> {
1012 let _old_alloc_ptr = edits.as_ptr();
1013 let mut wrap_edits = edits.into_iter();
1014 let wrap_edits = if let Some(mut first_edit) = wrap_edits.next() {
1015 // This code relies on reusing allocations from the Vec<_> - at the time of writing .flatten() prevents them.
1016 #[allow(clippy::filter_map_identity)]
1017 let mut v: Vec<_> = wrap_edits
1018 .scan(&mut first_edit, |prev_edit, edit| {
1019 if prev_edit.old.end >= edit.old.start {
1020 prev_edit.old.end = edit.old.end;
1021 prev_edit.new.end = edit.new.end;
1022 Some(None) // Skip this edit, it's merged
1023 } else {
1024 let prev = std::mem::replace(*prev_edit, edit);
1025 Some(Some(prev)) // Yield the previous edit
1026 }
1027 })
1028 .filter_map(|x| x)
1029 .collect();
1030 v.push(first_edit.clone());
1031 debug_assert_eq!(v.as_ptr(), _old_alloc_ptr, "Wrap edits were reallocated");
1032 v
1033 } else {
1034 vec![]
1035 };
1036
1037 wrap_edits
1038}
1039
1040#[cfg(test)]
1041mod tests {
1042 use super::*;
1043 use crate::{
1044 display_map::{fold_map::FoldMap, inlay_map::InlayMap, tab_map::TabMap},
1045 MultiBuffer,
1046 };
1047 use gpui::{font, px, test::observe};
1048 use rand::prelude::*;
1049 use settings::SettingsStore;
1050 use smol::stream::StreamExt;
1051 use std::{cmp, env, num::NonZeroU32};
1052 use text::Rope;
1053 use theme::LoadThemes;
1054
1055 #[gpui::test(iterations = 100)]
1056 async fn test_random_wraps(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
1057 // todo this test is flaky
1058 init_test(cx);
1059
1060 cx.background_executor.set_block_on_ticks(0..=50);
1061 let operations = env::var("OPERATIONS")
1062 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
1063 .unwrap_or(10);
1064
1065 let text_system = cx.read(|cx| cx.text_system().clone());
1066 let mut wrap_width = if rng.gen_bool(0.1) {
1067 None
1068 } else {
1069 Some(px(rng.gen_range(0.0..=1000.0)))
1070 };
1071 let tab_size = NonZeroU32::new(rng.gen_range(1..=4)).unwrap();
1072 let font = font("Helvetica");
1073 let _font_id = text_system.font_id(&font);
1074 let font_size = px(14.0);
1075
1076 log::info!("Tab size: {}", tab_size);
1077 log::info!("Wrap width: {:?}", wrap_width);
1078
1079 let buffer = cx.update(|cx| {
1080 if rng.gen() {
1081 MultiBuffer::build_random(&mut rng, cx)
1082 } else {
1083 let len = rng.gen_range(0..10);
1084 let text = util::RandomCharIter::new(&mut rng)
1085 .take(len)
1086 .collect::<String>();
1087 MultiBuffer::build_simple(&text, cx)
1088 }
1089 });
1090 let mut buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
1091 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1092 let (mut inlay_map, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
1093 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1094 let (mut fold_map, fold_snapshot) = FoldMap::new(inlay_snapshot.clone());
1095 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1096 let (mut tab_map, _) = TabMap::new(fold_snapshot.clone(), tab_size);
1097 let tabs_snapshot = tab_map.set_max_expansion_column(32);
1098 log::info!("TabMap text: {:?}", tabs_snapshot.text());
1099
1100 let mut line_wrapper = text_system.line_wrapper(font.clone(), font_size);
1101 let unwrapped_text = tabs_snapshot.text();
1102 let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
1103
1104 let (wrap_map, _) =
1105 cx.update(|cx| WrapMap::new(tabs_snapshot.clone(), font, font_size, wrap_width, cx));
1106 let mut notifications = observe(&wrap_map, cx);
1107
1108 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1109 notifications.next().await.unwrap();
1110 }
1111
1112 let (initial_snapshot, _) = wrap_map.update(cx, |map, cx| {
1113 assert!(!map.is_rewrapping());
1114 map.sync(tabs_snapshot.clone(), Vec::new(), cx)
1115 });
1116
1117 let actual_text = initial_snapshot.text();
1118 assert_eq!(
1119 actual_text, expected_text,
1120 "unwrapped text is: {:?}",
1121 unwrapped_text
1122 );
1123 log::info!("Wrapped text: {:?}", actual_text);
1124
1125 let mut next_inlay_id = 0;
1126 let mut edits = Vec::new();
1127 for _i in 0..operations {
1128 log::info!("{} ==============================================", _i);
1129
1130 let mut buffer_edits = Vec::new();
1131 match rng.gen_range(0..=100) {
1132 0..=19 => {
1133 wrap_width = if rng.gen_bool(0.2) {
1134 None
1135 } else {
1136 Some(px(rng.gen_range(0.0..=1000.0)))
1137 };
1138 log::info!("Setting wrap width to {:?}", wrap_width);
1139 wrap_map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
1140 }
1141 20..=39 => {
1142 for (fold_snapshot, fold_edits) in fold_map.randomly_mutate(&mut rng) {
1143 let (tabs_snapshot, tab_edits) =
1144 tab_map.sync(fold_snapshot, fold_edits, tab_size);
1145 let (mut snapshot, wrap_edits) =
1146 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1147 snapshot.check_invariants();
1148 snapshot.verify_chunks(&mut rng);
1149 edits.push((snapshot, wrap_edits));
1150 }
1151 }
1152 40..=59 => {
1153 let (inlay_snapshot, inlay_edits) =
1154 inlay_map.randomly_mutate(&mut next_inlay_id, &mut rng);
1155 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1156 let (tabs_snapshot, tab_edits) =
1157 tab_map.sync(fold_snapshot, fold_edits, tab_size);
1158 let (mut snapshot, wrap_edits) =
1159 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1160 snapshot.check_invariants();
1161 snapshot.verify_chunks(&mut rng);
1162 edits.push((snapshot, wrap_edits));
1163 }
1164 _ => {
1165 buffer.update(cx, |buffer, cx| {
1166 let subscription = buffer.subscribe();
1167 let edit_count = rng.gen_range(1..=5);
1168 buffer.randomly_mutate(&mut rng, edit_count, cx);
1169 buffer_snapshot = buffer.snapshot(cx);
1170 buffer_edits.extend(subscription.consume());
1171 });
1172 }
1173 }
1174
1175 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1176 let (inlay_snapshot, inlay_edits) =
1177 inlay_map.sync(buffer_snapshot.clone(), buffer_edits);
1178 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1179 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1180 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1181 let (tabs_snapshot, tab_edits) = tab_map.sync(fold_snapshot, fold_edits, tab_size);
1182 log::info!("TabMap text: {:?}", tabs_snapshot.text());
1183
1184 let unwrapped_text = tabs_snapshot.text();
1185 let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
1186 let (mut snapshot, wrap_edits) =
1187 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot.clone(), tab_edits, cx));
1188 snapshot.check_invariants();
1189 snapshot.verify_chunks(&mut rng);
1190 edits.push((snapshot, wrap_edits));
1191
1192 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) && rng.gen_bool(0.4) {
1193 log::info!("Waiting for wrapping to finish");
1194 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1195 notifications.next().await.unwrap();
1196 }
1197 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1198 }
1199
1200 if !wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1201 let (mut wrapped_snapshot, wrap_edits) =
1202 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, Vec::new(), cx));
1203 let actual_text = wrapped_snapshot.text();
1204 let actual_longest_row = wrapped_snapshot.longest_row();
1205 log::info!("Wrapping finished: {:?}", actual_text);
1206 wrapped_snapshot.check_invariants();
1207 wrapped_snapshot.verify_chunks(&mut rng);
1208 edits.push((wrapped_snapshot.clone(), wrap_edits));
1209 assert_eq!(
1210 actual_text, expected_text,
1211 "unwrapped text is: {:?}",
1212 unwrapped_text
1213 );
1214
1215 let mut summary = TextSummary::default();
1216 for (ix, item) in wrapped_snapshot
1217 .transforms
1218 .items(&())
1219 .into_iter()
1220 .enumerate()
1221 {
1222 summary += &item.summary.output;
1223 log::info!("{} summary: {:?}", ix, item.summary.output,);
1224 }
1225
1226 if tab_size.get() == 1
1227 || !wrapped_snapshot
1228 .tab_snapshot
1229 .fold_snapshot
1230 .text()
1231 .contains('\t')
1232 {
1233 let mut expected_longest_rows = Vec::new();
1234 let mut longest_line_len = -1;
1235 for (row, line) in expected_text.split('\n').enumerate() {
1236 let line_char_count = line.chars().count() as isize;
1237 if line_char_count > longest_line_len {
1238 expected_longest_rows.clear();
1239 longest_line_len = line_char_count;
1240 }
1241 if line_char_count >= longest_line_len {
1242 expected_longest_rows.push(row as u32);
1243 }
1244 }
1245
1246 assert!(
1247 expected_longest_rows.contains(&actual_longest_row),
1248 "incorrect longest row {}. expected {:?} with length {}",
1249 actual_longest_row,
1250 expected_longest_rows,
1251 longest_line_len,
1252 )
1253 }
1254 }
1255 }
1256
1257 let mut initial_text = Rope::from(initial_snapshot.text().as_str());
1258 for (snapshot, patch) in edits {
1259 let snapshot_text = Rope::from(snapshot.text().as_str());
1260 for edit in &patch {
1261 let old_start = initial_text.point_to_offset(Point::new(edit.new.start, 0));
1262 let old_end = initial_text.point_to_offset(cmp::min(
1263 Point::new(edit.new.start + edit.old.len() as u32, 0),
1264 initial_text.max_point(),
1265 ));
1266 let new_start = snapshot_text.point_to_offset(Point::new(edit.new.start, 0));
1267 let new_end = snapshot_text.point_to_offset(cmp::min(
1268 Point::new(edit.new.end, 0),
1269 snapshot_text.max_point(),
1270 ));
1271 let new_text = snapshot_text
1272 .chunks_in_range(new_start..new_end)
1273 .collect::<String>();
1274
1275 initial_text.replace(old_start..old_end, &new_text);
1276 }
1277 assert_eq!(initial_text.to_string(), snapshot_text.to_string());
1278 }
1279
1280 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1281 log::info!("Waiting for wrapping to finish");
1282 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1283 notifications.next().await.unwrap();
1284 }
1285 }
1286 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1287 }
1288
1289 fn init_test(cx: &mut gpui::TestAppContext) {
1290 cx.update(|cx| {
1291 let settings = SettingsStore::test(cx);
1292 cx.set_global(settings);
1293 theme::init(LoadThemes::JustBase, cx);
1294 });
1295 }
1296
1297 fn wrap_text(
1298 unwrapped_text: &str,
1299 wrap_width: Option<Pixels>,
1300 line_wrapper: &mut LineWrapper,
1301 ) -> String {
1302 if let Some(wrap_width) = wrap_width {
1303 let mut wrapped_text = String::new();
1304 for (row, line) in unwrapped_text.split('\n').enumerate() {
1305 if row > 0 {
1306 wrapped_text.push('\n')
1307 }
1308
1309 let mut prev_ix = 0;
1310 for boundary in line_wrapper.wrap_line(line, wrap_width) {
1311 wrapped_text.push_str(&line[prev_ix..boundary.ix]);
1312 wrapped_text.push('\n');
1313 wrapped_text.push_str(&" ".repeat(boundary.next_indent as usize));
1314 prev_ix = boundary.ix;
1315 }
1316 wrapped_text.push_str(&line[prev_ix..]);
1317 }
1318 wrapped_text
1319 } else {
1320 unwrapped_text.to_string()
1321 }
1322 }
1323
1324 impl WrapSnapshot {
1325 pub fn text(&self) -> String {
1326 self.text_chunks(0).collect()
1327 }
1328
1329 pub fn text_chunks(&self, wrap_row: u32) -> impl Iterator<Item = &str> {
1330 self.chunks(
1331 wrap_row..self.max_point().row() + 1,
1332 false,
1333 Highlights::default(),
1334 )
1335 .map(|h| h.text)
1336 }
1337
1338 fn verify_chunks(&mut self, rng: &mut impl Rng) {
1339 for _ in 0..5 {
1340 let mut end_row = rng.gen_range(0..=self.max_point().row());
1341 let start_row = rng.gen_range(0..=end_row);
1342 end_row += 1;
1343
1344 let mut expected_text = self.text_chunks(start_row).collect::<String>();
1345 if expected_text.ends_with('\n') {
1346 expected_text.push('\n');
1347 }
1348 let mut expected_text = expected_text
1349 .lines()
1350 .take((end_row - start_row) as usize)
1351 .collect::<Vec<_>>()
1352 .join("\n");
1353 if end_row <= self.max_point().row() {
1354 expected_text.push('\n');
1355 }
1356
1357 let actual_text = self
1358 .chunks(start_row..end_row, true, Highlights::default())
1359 .map(|c| c.text)
1360 .collect::<String>();
1361 assert_eq!(
1362 expected_text,
1363 actual_text,
1364 "chunks != highlighted_chunks for rows {:?}",
1365 start_row..end_row
1366 );
1367 }
1368 }
1369 }
1370}