1use super::{
2 char_map::{self, CharPoint, CharSnapshot, TabEdit},
3 fold_map::FoldBufferRows,
4 Highlights,
5};
6use gpui::{AppContext, Context, Font, LineWrapper, Model, ModelContext, Pixels, Task};
7use language::{Chunk, Point};
8use multi_buffer::MultiBufferSnapshot;
9use smol::future::yield_now;
10use std::sync::LazyLock;
11use std::{cmp, collections::VecDeque, mem, ops::Range, time::Duration};
12use sum_tree::{Bias, Cursor, SumTree};
13use text::Patch;
14
15pub use super::char_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<(CharSnapshot, 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 char_snapshot: CharSnapshot,
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: char_map::TabChunks<'a>,
55 input_chunk: Chunk<'a>,
56 output_position: WrapPoint,
57 max_output_row: u32,
58 transforms: Cursor<'a, Transform, (WrapPoint, CharPoint)>,
59 snapshot: &'a WrapSnapshot,
60}
61
62#[derive(Clone)]
63pub struct WrapBufferRows<'a> {
64 input_buffer_rows: FoldBufferRows<'a>,
65 input_buffer_row: Option<u32>,
66 output_row: u32,
67 soft_wrapped: bool,
68 max_output_row: u32,
69 transforms: Cursor<'a, Transform, (WrapPoint, CharPoint)>,
70}
71
72impl<'a> WrapBufferRows<'a> {
73 pub(crate) fn seek(&mut self, start_row: u32) {
74 self.transforms
75 .seek(&WrapPoint::new(start_row, 0), Bias::Left, &());
76 let mut input_row = self.transforms.start().1.row();
77 if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
78 input_row += start_row - self.transforms.start().0.row();
79 }
80 self.soft_wrapped = self.transforms.item().map_or(false, |t| !t.is_isomorphic());
81 self.input_buffer_rows.seek(input_row);
82 self.input_buffer_row = self.input_buffer_rows.next().unwrap();
83 self.output_row = start_row;
84 }
85}
86
87impl WrapMap {
88 pub fn new(
89 char_snapshot: CharSnapshot,
90 font: Font,
91 font_size: Pixels,
92 wrap_width: Option<Pixels>,
93 cx: &mut AppContext,
94 ) -> (Model<Self>, WrapSnapshot) {
95 let handle = cx.new_model(|cx| {
96 let mut this = Self {
97 font_with_size: (font, font_size),
98 wrap_width: None,
99 pending_edits: Default::default(),
100 interpolated_edits: Default::default(),
101 edits_since_sync: Default::default(),
102 snapshot: WrapSnapshot::new(char_snapshot),
103 background_task: None,
104 };
105 this.set_wrap_width(wrap_width, cx);
106 mem::take(&mut this.edits_since_sync);
107 this
108 });
109 let snapshot = handle.read(cx).snapshot.clone();
110 (handle, snapshot)
111 }
112
113 #[cfg(test)]
114 pub fn is_rewrapping(&self) -> bool {
115 self.background_task.is_some()
116 }
117
118 pub fn sync(
119 &mut self,
120 char_snapshot: CharSnapshot,
121 edits: Vec<TabEdit>,
122 cx: &mut ModelContext<Self>,
123 ) -> (WrapSnapshot, Patch<u32>) {
124 if self.wrap_width.is_some() {
125 self.pending_edits.push_back((char_snapshot, edits));
126 self.flush_edits(cx);
127 } else {
128 self.edits_since_sync = self
129 .edits_since_sync
130 .compose(self.snapshot.interpolate(char_snapshot, &edits));
131 self.snapshot.interpolated = false;
132 }
133
134 (self.snapshot.clone(), mem::take(&mut self.edits_since_sync))
135 }
136
137 pub fn set_font_with_size(
138 &mut self,
139 font: Font,
140 font_size: Pixels,
141 cx: &mut ModelContext<Self>,
142 ) -> bool {
143 let font_with_size = (font, font_size);
144
145 if font_with_size == self.font_with_size {
146 false
147 } else {
148 self.font_with_size = font_with_size;
149 self.rewrap(cx);
150 true
151 }
152 }
153
154 pub fn set_wrap_width(
155 &mut self,
156 wrap_width: Option<Pixels>,
157 cx: &mut ModelContext<Self>,
158 ) -> bool {
159 if wrap_width == self.wrap_width {
160 return false;
161 }
162
163 self.wrap_width = wrap_width;
164 self.rewrap(cx);
165 true
166 }
167
168 fn rewrap(&mut self, cx: &mut ModelContext<Self>) {
169 self.background_task.take();
170 self.interpolated_edits.clear();
171 self.pending_edits.clear();
172
173 if let Some(wrap_width) = self.wrap_width {
174 let mut new_snapshot = self.snapshot.clone();
175
176 let text_system = cx.text_system().clone();
177 let (font, font_size) = self.font_with_size.clone();
178 let task = cx.background_executor().spawn(async move {
179 let mut line_wrapper = text_system.line_wrapper(font, font_size);
180 let char_snapshot = new_snapshot.char_snapshot.clone();
181 let range = CharPoint::zero()..char_snapshot.max_point();
182 let edits = new_snapshot
183 .update(
184 char_snapshot,
185 &[TabEdit {
186 old: range.clone(),
187 new: range.clone(),
188 }],
189 wrap_width,
190 &mut line_wrapper,
191 )
192 .await;
193 (new_snapshot, edits)
194 });
195
196 match cx
197 .background_executor()
198 .block_with_timeout(Duration::from_millis(5), task)
199 {
200 Ok((snapshot, edits)) => {
201 self.snapshot = snapshot;
202 self.edits_since_sync = self.edits_since_sync.compose(&edits);
203 }
204 Err(wrap_task) => {
205 self.background_task = Some(cx.spawn(|this, mut cx| async move {
206 let (snapshot, edits) = wrap_task.await;
207 this.update(&mut cx, |this, cx| {
208 this.snapshot = snapshot;
209 this.edits_since_sync = this
210 .edits_since_sync
211 .compose(mem::take(&mut this.interpolated_edits).invert())
212 .compose(&edits);
213 this.background_task = None;
214 this.flush_edits(cx);
215 cx.notify();
216 })
217 .ok();
218 }));
219 }
220 }
221 } else {
222 let old_rows = self.snapshot.transforms.summary().output.lines.row + 1;
223 self.snapshot.transforms = SumTree::default();
224 let summary = self.snapshot.char_snapshot.text_summary();
225 if !summary.lines.is_zero() {
226 self.snapshot
227 .transforms
228 .push(Transform::isomorphic(summary), &());
229 }
230 let new_rows = self.snapshot.transforms.summary().output.lines.row + 1;
231 self.snapshot.interpolated = false;
232 self.edits_since_sync = self.edits_since_sync.compose(Patch::new(vec![WrapEdit {
233 old: 0..old_rows,
234 new: 0..new_rows,
235 }]));
236 }
237 }
238
239 fn flush_edits(&mut self, cx: &mut ModelContext<Self>) {
240 if !self.snapshot.interpolated {
241 let mut to_remove_len = 0;
242 for (char_snapshot, _) in &self.pending_edits {
243 if char_snapshot.version <= self.snapshot.char_snapshot.version {
244 to_remove_len += 1;
245 } else {
246 break;
247 }
248 }
249 self.pending_edits.drain(..to_remove_len);
250 }
251
252 if self.pending_edits.is_empty() {
253 return;
254 }
255
256 if let Some(wrap_width) = self.wrap_width {
257 if self.background_task.is_none() {
258 let pending_edits = self.pending_edits.clone();
259 let mut snapshot = self.snapshot.clone();
260 let text_system = cx.text_system().clone();
261 let (font, font_size) = self.font_with_size.clone();
262 let update_task = cx.background_executor().spawn(async move {
263 let mut edits = Patch::default();
264 let mut line_wrapper = text_system.line_wrapper(font, font_size);
265 for (char_snapshot, tab_edits) in pending_edits {
266 let wrap_edits = snapshot
267 .update(char_snapshot, &tab_edits, wrap_width, &mut line_wrapper)
268 .await;
269 edits = edits.compose(&wrap_edits);
270 }
271 (snapshot, edits)
272 });
273
274 match cx
275 .background_executor()
276 .block_with_timeout(Duration::from_millis(1), update_task)
277 {
278 Ok((snapshot, output_edits)) => {
279 self.snapshot = snapshot;
280 self.edits_since_sync = self.edits_since_sync.compose(&output_edits);
281 }
282 Err(update_task) => {
283 self.background_task = Some(cx.spawn(|this, mut cx| async move {
284 let (snapshot, edits) = update_task.await;
285 this.update(&mut cx, |this, cx| {
286 this.snapshot = snapshot;
287 this.edits_since_sync = this
288 .edits_since_sync
289 .compose(mem::take(&mut this.interpolated_edits).invert())
290 .compose(&edits);
291 this.background_task = None;
292 this.flush_edits(cx);
293 cx.notify();
294 })
295 .ok();
296 }));
297 }
298 }
299 }
300 }
301
302 let was_interpolated = self.snapshot.interpolated;
303 let mut to_remove_len = 0;
304 for (char_snapshot, edits) in &self.pending_edits {
305 if char_snapshot.version <= self.snapshot.char_snapshot.version {
306 to_remove_len += 1;
307 } else {
308 let interpolated_edits = self.snapshot.interpolate(char_snapshot.clone(), edits);
309 self.edits_since_sync = self.edits_since_sync.compose(&interpolated_edits);
310 self.interpolated_edits = self.interpolated_edits.compose(&interpolated_edits);
311 }
312 }
313
314 if !was_interpolated {
315 self.pending_edits.drain(..to_remove_len);
316 }
317 }
318}
319
320impl WrapSnapshot {
321 fn new(char_snapshot: CharSnapshot) -> Self {
322 let mut transforms = SumTree::default();
323 let extent = char_snapshot.text_summary();
324 if !extent.lines.is_zero() {
325 transforms.push(Transform::isomorphic(extent), &());
326 }
327 Self {
328 transforms,
329 char_snapshot,
330 interpolated: true,
331 }
332 }
333
334 pub fn buffer_snapshot(&self) -> &MultiBufferSnapshot {
335 self.char_snapshot.buffer_snapshot()
336 }
337
338 fn interpolate(
339 &mut self,
340 new_char_snapshot: CharSnapshot,
341 tab_edits: &[TabEdit],
342 ) -> Patch<u32> {
343 let mut new_transforms;
344 if tab_edits.is_empty() {
345 new_transforms = self.transforms.clone();
346 } else {
347 let mut old_cursor = self.transforms.cursor::<CharPoint>(&());
348
349 let mut tab_edits_iter = tab_edits.iter().peekable();
350 new_transforms =
351 old_cursor.slice(&tab_edits_iter.peek().unwrap().old.start, Bias::Right, &());
352
353 while let Some(edit) = tab_edits_iter.next() {
354 if edit.new.start > CharPoint::from(new_transforms.summary().input.lines) {
355 let summary = new_char_snapshot.text_summary_for_range(
356 CharPoint::from(new_transforms.summary().input.lines)..edit.new.start,
357 );
358 new_transforms.push_or_extend(Transform::isomorphic(summary));
359 }
360
361 if !edit.new.is_empty() {
362 new_transforms.push_or_extend(Transform::isomorphic(
363 new_char_snapshot.text_summary_for_range(edit.new.clone()),
364 ));
365 }
366
367 old_cursor.seek_forward(&edit.old.end, Bias::Right, &());
368 if let Some(next_edit) = tab_edits_iter.peek() {
369 if next_edit.old.start > old_cursor.end(&()) {
370 if old_cursor.end(&()) > edit.old.end {
371 let summary = self
372 .char_snapshot
373 .text_summary_for_range(edit.old.end..old_cursor.end(&()));
374 new_transforms.push_or_extend(Transform::isomorphic(summary));
375 }
376
377 old_cursor.next(&());
378 new_transforms.append(
379 old_cursor.slice(&next_edit.old.start, Bias::Right, &()),
380 &(),
381 );
382 }
383 } else {
384 if old_cursor.end(&()) > edit.old.end {
385 let summary = self
386 .char_snapshot
387 .text_summary_for_range(edit.old.end..old_cursor.end(&()));
388 new_transforms.push_or_extend(Transform::isomorphic(summary));
389 }
390 old_cursor.next(&());
391 new_transforms.append(old_cursor.suffix(&()), &());
392 }
393 }
394 }
395
396 let old_snapshot = mem::replace(
397 self,
398 WrapSnapshot {
399 char_snapshot: new_char_snapshot,
400 transforms: new_transforms,
401 interpolated: true,
402 },
403 );
404 self.check_invariants();
405 old_snapshot.compute_edits(tab_edits, self)
406 }
407
408 async fn update(
409 &mut self,
410 new_char_snapshot: CharSnapshot,
411 tab_edits: &[TabEdit],
412 wrap_width: Pixels,
413 line_wrapper: &mut LineWrapper,
414 ) -> Patch<u32> {
415 #[derive(Debug)]
416 struct RowEdit {
417 old_rows: Range<u32>,
418 new_rows: Range<u32>,
419 }
420
421 let mut tab_edits_iter = tab_edits.iter().peekable();
422 let mut row_edits = Vec::new();
423 while let Some(edit) = tab_edits_iter.next() {
424 let mut row_edit = RowEdit {
425 old_rows: edit.old.start.row()..edit.old.end.row() + 1,
426 new_rows: edit.new.start.row()..edit.new.end.row() + 1,
427 };
428
429 while let Some(next_edit) = tab_edits_iter.peek() {
430 if next_edit.old.start.row() <= row_edit.old_rows.end {
431 row_edit.old_rows.end = next_edit.old.end.row() + 1;
432 row_edit.new_rows.end = next_edit.new.end.row() + 1;
433 tab_edits_iter.next();
434 } else {
435 break;
436 }
437 }
438
439 row_edits.push(row_edit);
440 }
441
442 let mut new_transforms;
443 if row_edits.is_empty() {
444 new_transforms = self.transforms.clone();
445 } else {
446 let mut row_edits = row_edits.into_iter().peekable();
447 let mut old_cursor = self.transforms.cursor::<CharPoint>(&());
448
449 new_transforms = old_cursor.slice(
450 &CharPoint::new(row_edits.peek().unwrap().old_rows.start, 0),
451 Bias::Right,
452 &(),
453 );
454
455 while let Some(edit) = row_edits.next() {
456 if edit.new_rows.start > new_transforms.summary().input.lines.row {
457 let summary = new_char_snapshot.text_summary_for_range(
458 CharPoint(new_transforms.summary().input.lines)
459 ..CharPoint::new(edit.new_rows.start, 0),
460 );
461 new_transforms.push_or_extend(Transform::isomorphic(summary));
462 }
463
464 let mut line = String::new();
465 let mut remaining = None;
466 let mut chunks = new_char_snapshot.chunks(
467 CharPoint::new(edit.new_rows.start, 0)..new_char_snapshot.max_point(),
468 false,
469 Highlights::default(),
470 );
471 let mut edit_transforms = Vec::<Transform>::new();
472 for _ in edit.new_rows.start..edit.new_rows.end {
473 while let Some(chunk) =
474 remaining.take().or_else(|| chunks.next().map(|c| c.text))
475 {
476 if let Some(ix) = chunk.find('\n') {
477 line.push_str(&chunk[..ix + 1]);
478 remaining = Some(&chunk[ix + 1..]);
479 break;
480 } else {
481 line.push_str(chunk)
482 }
483 }
484
485 if line.is_empty() {
486 break;
487 }
488
489 let mut prev_boundary_ix = 0;
490 for boundary in line_wrapper.wrap_line(&line, wrap_width) {
491 let wrapped = &line[prev_boundary_ix..boundary.ix];
492 push_isomorphic(&mut edit_transforms, TextSummary::from(wrapped));
493 edit_transforms.push(Transform::wrap(boundary.next_indent));
494 prev_boundary_ix = boundary.ix;
495 }
496
497 if prev_boundary_ix < line.len() {
498 push_isomorphic(
499 &mut edit_transforms,
500 TextSummary::from(&line[prev_boundary_ix..]),
501 );
502 }
503
504 line.clear();
505 yield_now().await;
506 }
507
508 let mut edit_transforms = edit_transforms.into_iter();
509 if let Some(transform) = edit_transforms.next() {
510 new_transforms.push_or_extend(transform);
511 }
512 new_transforms.extend(edit_transforms, &());
513
514 old_cursor.seek_forward(&CharPoint::new(edit.old_rows.end, 0), Bias::Right, &());
515 if let Some(next_edit) = row_edits.peek() {
516 if next_edit.old_rows.start > old_cursor.end(&()).row() {
517 if old_cursor.end(&()) > CharPoint::new(edit.old_rows.end, 0) {
518 let summary = self.char_snapshot.text_summary_for_range(
519 CharPoint::new(edit.old_rows.end, 0)..old_cursor.end(&()),
520 );
521 new_transforms.push_or_extend(Transform::isomorphic(summary));
522 }
523 old_cursor.next(&());
524 new_transforms.append(
525 old_cursor.slice(
526 &CharPoint::new(next_edit.old_rows.start, 0),
527 Bias::Right,
528 &(),
529 ),
530 &(),
531 );
532 }
533 } else {
534 if old_cursor.end(&()) > CharPoint::new(edit.old_rows.end, 0) {
535 let summary = self.char_snapshot.text_summary_for_range(
536 CharPoint::new(edit.old_rows.end, 0)..old_cursor.end(&()),
537 );
538 new_transforms.push_or_extend(Transform::isomorphic(summary));
539 }
540 old_cursor.next(&());
541 new_transforms.append(old_cursor.suffix(&()), &());
542 }
543 }
544 }
545
546 let old_snapshot = mem::replace(
547 self,
548 WrapSnapshot {
549 char_snapshot: new_char_snapshot,
550 transforms: new_transforms,
551 interpolated: false,
552 },
553 );
554 self.check_invariants();
555 old_snapshot.compute_edits(tab_edits, self)
556 }
557
558 fn compute_edits(&self, tab_edits: &[TabEdit], new_snapshot: &WrapSnapshot) -> Patch<u32> {
559 let mut wrap_edits = Vec::new();
560 let mut old_cursor = self.transforms.cursor::<TransformSummary>(&());
561 let mut new_cursor = new_snapshot.transforms.cursor::<TransformSummary>(&());
562 for mut tab_edit in tab_edits.iter().cloned() {
563 tab_edit.old.start.0.column = 0;
564 tab_edit.old.end.0 += Point::new(1, 0);
565 tab_edit.new.start.0.column = 0;
566 tab_edit.new.end.0 += Point::new(1, 0);
567
568 old_cursor.seek(&tab_edit.old.start, Bias::Right, &());
569 let mut old_start = old_cursor.start().output.lines;
570 old_start += tab_edit.old.start.0 - old_cursor.start().input.lines;
571
572 old_cursor.seek(&tab_edit.old.end, Bias::Right, &());
573 let mut old_end = old_cursor.start().output.lines;
574 old_end += tab_edit.old.end.0 - old_cursor.start().input.lines;
575
576 new_cursor.seek(&tab_edit.new.start, Bias::Right, &());
577 let mut new_start = new_cursor.start().output.lines;
578 new_start += tab_edit.new.start.0 - new_cursor.start().input.lines;
579
580 new_cursor.seek(&tab_edit.new.end, Bias::Right, &());
581 let mut new_end = new_cursor.start().output.lines;
582 new_end += tab_edit.new.end.0 - new_cursor.start().input.lines;
583
584 wrap_edits.push(WrapEdit {
585 old: old_start.row..old_end.row,
586 new: new_start.row..new_end.row,
587 });
588 }
589
590 wrap_edits = consolidate_wrap_edits(wrap_edits);
591 Patch::new(wrap_edits)
592 }
593
594 pub(crate) fn chunks<'a>(
595 &'a self,
596 rows: Range<u32>,
597 language_aware: bool,
598 highlights: Highlights<'a>,
599 ) -> WrapChunks<'a> {
600 let output_start = WrapPoint::new(rows.start, 0);
601 let output_end = WrapPoint::new(rows.end, 0);
602 let mut transforms = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
603 transforms.seek(&output_start, Bias::Right, &());
604 let mut input_start = CharPoint(transforms.start().1 .0);
605 if transforms.item().map_or(false, |t| t.is_isomorphic()) {
606 input_start.0 += output_start.0 - transforms.start().0 .0;
607 }
608 let input_end = self
609 .to_char_point(output_end)
610 .min(self.char_snapshot.max_point());
611 WrapChunks {
612 input_chunks: self.char_snapshot.chunks(
613 input_start..input_end,
614 language_aware,
615 highlights,
616 ),
617 input_chunk: Default::default(),
618 output_position: output_start,
619 max_output_row: rows.end,
620 transforms,
621 snapshot: self,
622 }
623 }
624
625 pub fn max_point(&self) -> WrapPoint {
626 WrapPoint(self.transforms.summary().output.lines)
627 }
628
629 pub fn line_len(&self, row: u32) -> u32 {
630 let mut cursor = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
631 cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Left, &());
632 if cursor
633 .item()
634 .map_or(false, |transform| transform.is_isomorphic())
635 {
636 let overshoot = row - cursor.start().0.row();
637 let tab_row = cursor.start().1.row() + overshoot;
638 let tab_line_len = self.char_snapshot.line_len(tab_row);
639 if overshoot == 0 {
640 cursor.start().0.column() + (tab_line_len - cursor.start().1.column())
641 } else {
642 tab_line_len
643 }
644 } else {
645 cursor.start().0.column()
646 }
647 }
648
649 pub fn text_summary_for_range(&self, rows: Range<u32>) -> TextSummary {
650 let mut summary = TextSummary::default();
651
652 let start = WrapPoint::new(rows.start, 0);
653 let end = WrapPoint::new(rows.end, 0);
654
655 let mut cursor = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
656 cursor.seek(&start, Bias::Right, &());
657 if let Some(transform) = cursor.item() {
658 let start_in_transform = start.0 - cursor.start().0 .0;
659 let end_in_transform = cmp::min(end, cursor.end(&()).0).0 - cursor.start().0 .0;
660 if transform.is_isomorphic() {
661 let char_start = CharPoint(cursor.start().1 .0 + start_in_transform);
662 let char_end = CharPoint(cursor.start().1 .0 + end_in_transform);
663 summary += &self
664 .char_snapshot
665 .text_summary_for_range(char_start..char_end);
666 } else {
667 debug_assert_eq!(start_in_transform.row, end_in_transform.row);
668 let indent_len = end_in_transform.column - start_in_transform.column;
669 summary += &TextSummary {
670 lines: Point::new(0, indent_len),
671 first_line_chars: indent_len,
672 last_line_chars: indent_len,
673 longest_row: 0,
674 longest_row_chars: indent_len,
675 };
676 }
677
678 cursor.next(&());
679 }
680
681 if rows.end > cursor.start().0.row() {
682 summary += &cursor
683 .summary::<_, TransformSummary>(&WrapPoint::new(rows.end, 0), Bias::Right, &())
684 .output;
685
686 if let Some(transform) = cursor.item() {
687 let end_in_transform = end.0 - cursor.start().0 .0;
688 if transform.is_isomorphic() {
689 let char_start = cursor.start().1;
690 let char_end = CharPoint(char_start.0 + end_in_transform);
691 summary += &self
692 .char_snapshot
693 .text_summary_for_range(char_start..char_end);
694 } else {
695 debug_assert_eq!(end_in_transform, Point::new(1, 0));
696 summary += &TextSummary {
697 lines: Point::new(1, 0),
698 first_line_chars: 0,
699 last_line_chars: 0,
700 longest_row: 0,
701 longest_row_chars: 0,
702 };
703 }
704 }
705 }
706
707 summary
708 }
709
710 pub fn soft_wrap_indent(&self, row: u32) -> Option<u32> {
711 let mut cursor = self.transforms.cursor::<WrapPoint>(&());
712 cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Right, &());
713 cursor.item().and_then(|transform| {
714 if transform.is_isomorphic() {
715 None
716 } else {
717 Some(transform.summary.output.lines.column)
718 }
719 })
720 }
721
722 pub fn longest_row(&self) -> u32 {
723 self.transforms.summary().output.longest_row
724 }
725
726 pub fn buffer_rows(&self, start_row: u32) -> WrapBufferRows {
727 let mut transforms = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
728 transforms.seek(&WrapPoint::new(start_row, 0), Bias::Left, &());
729 let mut input_row = transforms.start().1.row();
730 if transforms.item().map_or(false, |t| t.is_isomorphic()) {
731 input_row += start_row - transforms.start().0.row();
732 }
733 let soft_wrapped = transforms.item().map_or(false, |t| !t.is_isomorphic());
734 let mut input_buffer_rows = self.char_snapshot.buffer_rows(input_row);
735 let input_buffer_row = input_buffer_rows.next().unwrap();
736 WrapBufferRows {
737 transforms,
738 input_buffer_row,
739 input_buffer_rows,
740 output_row: start_row,
741 soft_wrapped,
742 max_output_row: self.max_point().row(),
743 }
744 }
745
746 pub fn to_char_point(&self, point: WrapPoint) -> CharPoint {
747 let mut cursor = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
748 cursor.seek(&point, Bias::Right, &());
749 let mut char_point = cursor.start().1 .0;
750 if cursor.item().map_or(false, |t| t.is_isomorphic()) {
751 char_point += point.0 - cursor.start().0 .0;
752 }
753 CharPoint(char_point)
754 }
755
756 pub fn to_point(&self, point: WrapPoint, bias: Bias) -> Point {
757 self.char_snapshot.to_point(self.to_char_point(point), bias)
758 }
759
760 pub fn make_wrap_point(&self, point: Point, bias: Bias) -> WrapPoint {
761 self.char_point_to_wrap_point(self.char_snapshot.make_char_point(point, bias))
762 }
763
764 pub fn char_point_to_wrap_point(&self, point: CharPoint) -> WrapPoint {
765 let mut cursor = self.transforms.cursor::<(CharPoint, WrapPoint)>(&());
766 cursor.seek(&point, Bias::Right, &());
767 WrapPoint(cursor.start().1 .0 + (point.0 - cursor.start().0 .0))
768 }
769
770 pub fn clip_point(&self, mut point: WrapPoint, bias: Bias) -> WrapPoint {
771 if bias == Bias::Left {
772 let mut cursor = self.transforms.cursor::<WrapPoint>(&());
773 cursor.seek(&point, Bias::Right, &());
774 if cursor.item().map_or(false, |t| !t.is_isomorphic()) {
775 point = *cursor.start();
776 *point.column_mut() -= 1;
777 }
778 }
779
780 self.char_point_to_wrap_point(
781 self.char_snapshot
782 .clip_point(self.to_char_point(point), bias),
783 )
784 }
785
786 pub fn prev_row_boundary(&self, mut point: WrapPoint) -> u32 {
787 if self.transforms.is_empty() {
788 return 0;
789 }
790
791 *point.column_mut() = 0;
792
793 let mut cursor = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
794 cursor.seek(&point, Bias::Right, &());
795 if cursor.item().is_none() {
796 cursor.prev(&());
797 }
798
799 while let Some(transform) = cursor.item() {
800 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
801 return cmp::min(cursor.end(&()).0.row(), point.row());
802 } else {
803 cursor.prev(&());
804 }
805 }
806
807 unreachable!()
808 }
809
810 pub fn next_row_boundary(&self, mut point: WrapPoint) -> Option<u32> {
811 point.0 += Point::new(1, 0);
812
813 let mut cursor = self.transforms.cursor::<(WrapPoint, CharPoint)>(&());
814 cursor.seek(&point, Bias::Right, &());
815 while let Some(transform) = cursor.item() {
816 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
817 return Some(cmp::max(cursor.start().0.row(), point.row()));
818 } else {
819 cursor.next(&());
820 }
821 }
822
823 None
824 }
825
826 #[cfg(test)]
827 pub fn text(&self) -> String {
828 self.text_chunks(0).collect()
829 }
830
831 #[cfg(test)]
832 pub fn text_chunks(&self, wrap_row: u32) -> impl Iterator<Item = &str> {
833 self.chunks(
834 wrap_row..self.max_point().row() + 1,
835 false,
836 Highlights::default(),
837 )
838 .map(|h| h.text)
839 }
840
841 fn check_invariants(&self) {
842 #[cfg(test)]
843 {
844 assert_eq!(
845 CharPoint::from(self.transforms.summary().input.lines),
846 self.char_snapshot.max_point()
847 );
848
849 {
850 let mut transforms = self.transforms.cursor::<()>(&()).peekable();
851 while let Some(transform) = transforms.next() {
852 if let Some(next_transform) = transforms.peek() {
853 assert!(transform.is_isomorphic() != next_transform.is_isomorphic());
854 }
855 }
856 }
857
858 let text = language::Rope::from(self.text().as_str());
859 let mut input_buffer_rows = self.char_snapshot.buffer_rows(0);
860 let mut expected_buffer_rows = Vec::new();
861 let mut prev_tab_row = 0;
862 for display_row in 0..=self.max_point().row() {
863 let char_point = self.to_char_point(WrapPoint::new(display_row, 0));
864 if char_point.row() == prev_tab_row && display_row != 0 {
865 expected_buffer_rows.push(None);
866 } else {
867 expected_buffer_rows.push(input_buffer_rows.next().unwrap());
868 }
869
870 prev_tab_row = char_point.row();
871 assert_eq!(self.line_len(display_row), text.line_len(display_row));
872 }
873
874 for start_display_row in 0..expected_buffer_rows.len() {
875 assert_eq!(
876 self.buffer_rows(start_display_row as u32)
877 .collect::<Vec<_>>(),
878 &expected_buffer_rows[start_display_row..],
879 "invalid buffer_rows({}..)",
880 start_display_row
881 );
882 }
883 }
884 }
885}
886
887impl<'a> WrapChunks<'a> {
888 pub(crate) fn seek(&mut self, rows: Range<u32>) {
889 let output_start = WrapPoint::new(rows.start, 0);
890 let output_end = WrapPoint::new(rows.end, 0);
891 self.transforms.seek(&output_start, Bias::Right, &());
892 let mut input_start = CharPoint(self.transforms.start().1 .0);
893 if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
894 input_start.0 += output_start.0 - self.transforms.start().0 .0;
895 }
896 let input_end = self
897 .snapshot
898 .to_char_point(output_end)
899 .min(self.snapshot.char_snapshot.max_point());
900 self.input_chunks.seek(input_start..input_end);
901 self.input_chunk = Chunk::default();
902 self.output_position = output_start;
903 self.max_output_row = rows.end;
904 }
905}
906
907impl<'a> Iterator for WrapChunks<'a> {
908 type Item = Chunk<'a>;
909
910 fn next(&mut self) -> Option<Self::Item> {
911 if self.output_position.row() >= self.max_output_row {
912 return None;
913 }
914
915 let transform = self.transforms.item()?;
916 if let Some(display_text) = transform.display_text {
917 let mut start_ix = 0;
918 let mut end_ix = display_text.len();
919 let mut summary = transform.summary.output.lines;
920
921 if self.output_position > self.transforms.start().0 {
922 // Exclude newline starting prior to the desired row.
923 start_ix = 1;
924 summary.row = 0;
925 } else if self.output_position.row() + 1 >= self.max_output_row {
926 // Exclude soft indentation ending after the desired row.
927 end_ix = 1;
928 summary.column = 0;
929 }
930
931 self.output_position.0 += summary;
932 self.transforms.next(&());
933 return Some(Chunk {
934 text: &display_text[start_ix..end_ix],
935 ..self.input_chunk.clone()
936 });
937 }
938
939 if self.input_chunk.text.is_empty() {
940 self.input_chunk = self.input_chunks.next().unwrap();
941 }
942
943 let mut input_len = 0;
944 let transform_end = self.transforms.end(&()).0;
945 for c in self.input_chunk.text.chars() {
946 let char_len = c.len_utf8();
947 input_len += char_len;
948 if c == '\n' {
949 *self.output_position.row_mut() += 1;
950 *self.output_position.column_mut() = 0;
951 } else {
952 *self.output_position.column_mut() += char_len as u32;
953 }
954 if self.output_position >= transform_end {
955 self.transforms.next(&());
956 break;
957 }
958 }
959 let (prefix, suffix) = self.input_chunk.text.split_at(input_len);
960 self.input_chunk.text = suffix;
961 Some(Chunk {
962 text: prefix,
963 ..self.input_chunk.clone()
964 })
965 }
966}
967
968impl<'a> Iterator for WrapBufferRows<'a> {
969 type Item = Option<u32>;
970
971 fn next(&mut self) -> Option<Self::Item> {
972 if self.output_row > self.max_output_row {
973 return None;
974 }
975
976 let buffer_row = self.input_buffer_row;
977 let soft_wrapped = self.soft_wrapped;
978
979 self.output_row += 1;
980 self.transforms
981 .seek_forward(&WrapPoint::new(self.output_row, 0), Bias::Left, &());
982 if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
983 self.input_buffer_row = self.input_buffer_rows.next().unwrap();
984 self.soft_wrapped = false;
985 } else {
986 self.soft_wrapped = true;
987 }
988
989 Some(if soft_wrapped { None } else { buffer_row })
990 }
991}
992
993impl Transform {
994 fn isomorphic(summary: TextSummary) -> Self {
995 #[cfg(test)]
996 assert!(!summary.lines.is_zero());
997
998 Self {
999 summary: TransformSummary {
1000 input: summary.clone(),
1001 output: summary,
1002 },
1003 display_text: None,
1004 }
1005 }
1006
1007 fn wrap(indent: u32) -> Self {
1008 static WRAP_TEXT: LazyLock<String> = LazyLock::new(|| {
1009 let mut wrap_text = String::new();
1010 wrap_text.push('\n');
1011 wrap_text.extend((0..LineWrapper::MAX_INDENT as usize).map(|_| ' '));
1012 wrap_text
1013 });
1014
1015 Self {
1016 summary: TransformSummary {
1017 input: TextSummary::default(),
1018 output: TextSummary {
1019 lines: Point::new(1, indent),
1020 first_line_chars: 0,
1021 last_line_chars: indent,
1022 longest_row: 1,
1023 longest_row_chars: indent,
1024 },
1025 },
1026 display_text: Some(&WRAP_TEXT[..1 + indent as usize]),
1027 }
1028 }
1029
1030 fn is_isomorphic(&self) -> bool {
1031 self.display_text.is_none()
1032 }
1033}
1034
1035impl sum_tree::Item for Transform {
1036 type Summary = TransformSummary;
1037
1038 fn summary(&self, _cx: &()) -> Self::Summary {
1039 self.summary.clone()
1040 }
1041}
1042
1043fn push_isomorphic(transforms: &mut Vec<Transform>, summary: TextSummary) {
1044 if let Some(last_transform) = transforms.last_mut() {
1045 if last_transform.is_isomorphic() {
1046 last_transform.summary.input += &summary;
1047 last_transform.summary.output += &summary;
1048 return;
1049 }
1050 }
1051 transforms.push(Transform::isomorphic(summary));
1052}
1053
1054trait SumTreeExt {
1055 fn push_or_extend(&mut self, transform: Transform);
1056}
1057
1058impl SumTreeExt for SumTree<Transform> {
1059 fn push_or_extend(&mut self, transform: Transform) {
1060 let mut transform = Some(transform);
1061 self.update_last(
1062 |last_transform| {
1063 if last_transform.is_isomorphic() && transform.as_ref().unwrap().is_isomorphic() {
1064 let transform = transform.take().unwrap();
1065 last_transform.summary.input += &transform.summary.input;
1066 last_transform.summary.output += &transform.summary.output;
1067 }
1068 },
1069 &(),
1070 );
1071
1072 if let Some(transform) = transform {
1073 self.push(transform, &());
1074 }
1075 }
1076}
1077
1078impl WrapPoint {
1079 pub fn new(row: u32, column: u32) -> Self {
1080 Self(Point::new(row, column))
1081 }
1082
1083 pub fn row(self) -> u32 {
1084 self.0.row
1085 }
1086
1087 pub fn row_mut(&mut self) -> &mut u32 {
1088 &mut self.0.row
1089 }
1090
1091 pub fn column(self) -> u32 {
1092 self.0.column
1093 }
1094
1095 pub fn column_mut(&mut self) -> &mut u32 {
1096 &mut self.0.column
1097 }
1098}
1099
1100impl sum_tree::Summary for TransformSummary {
1101 type Context = ();
1102
1103 fn zero(_cx: &()) -> Self {
1104 Default::default()
1105 }
1106
1107 fn add_summary(&mut self, other: &Self, _: &()) {
1108 self.input += &other.input;
1109 self.output += &other.output;
1110 }
1111}
1112
1113impl<'a> sum_tree::Dimension<'a, TransformSummary> for CharPoint {
1114 fn zero(_cx: &()) -> Self {
1115 Default::default()
1116 }
1117
1118 fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
1119 self.0 += summary.input.lines;
1120 }
1121}
1122
1123impl<'a> sum_tree::SeekTarget<'a, TransformSummary, TransformSummary> for CharPoint {
1124 fn cmp(&self, cursor_location: &TransformSummary, _: &()) -> std::cmp::Ordering {
1125 Ord::cmp(&self.0, &cursor_location.input.lines)
1126 }
1127}
1128
1129impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapPoint {
1130 fn zero(_cx: &()) -> Self {
1131 Default::default()
1132 }
1133
1134 fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
1135 self.0 += summary.output.lines;
1136 }
1137}
1138
1139fn consolidate_wrap_edits(edits: Vec<WrapEdit>) -> Vec<WrapEdit> {
1140 let _old_alloc_ptr = edits.as_ptr();
1141 let mut wrap_edits = edits.into_iter();
1142
1143 if let Some(mut first_edit) = wrap_edits.next() {
1144 // This code relies on reusing allocations from the Vec<_> - at the time of writing .flatten() prevents them.
1145 #[allow(clippy::filter_map_identity)]
1146 let mut v: Vec<_> = wrap_edits
1147 .scan(&mut first_edit, |prev_edit, edit| {
1148 if prev_edit.old.end >= edit.old.start {
1149 prev_edit.old.end = edit.old.end;
1150 prev_edit.new.end = edit.new.end;
1151 Some(None) // Skip this edit, it's merged
1152 } else {
1153 let prev = std::mem::replace(*prev_edit, edit);
1154 Some(Some(prev)) // Yield the previous edit
1155 }
1156 })
1157 .filter_map(|x| x)
1158 .collect();
1159 v.push(first_edit.clone());
1160 debug_assert_eq!(v.as_ptr(), _old_alloc_ptr, "Wrap edits were reallocated");
1161 v
1162 } else {
1163 vec![]
1164 }
1165}
1166
1167#[cfg(test)]
1168mod tests {
1169 use super::*;
1170 use crate::{
1171 display_map::{char_map::CharMap, fold_map::FoldMap, inlay_map::InlayMap},
1172 MultiBuffer,
1173 };
1174 use gpui::{font, px, test::observe};
1175 use rand::prelude::*;
1176 use settings::SettingsStore;
1177 use smol::stream::StreamExt;
1178 use std::{cmp, env, num::NonZeroU32};
1179 use text::Rope;
1180 use theme::LoadThemes;
1181
1182 #[gpui::test(iterations = 100)]
1183 async fn test_random_wraps(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
1184 // todo this test is flaky
1185 init_test(cx);
1186
1187 cx.background_executor.set_block_on_ticks(0..=50);
1188 let operations = env::var("OPERATIONS")
1189 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
1190 .unwrap_or(10);
1191
1192 let text_system = cx.read(|cx| cx.text_system().clone());
1193 let mut wrap_width = if rng.gen_bool(0.1) {
1194 None
1195 } else {
1196 Some(px(rng.gen_range(0.0..=1000.0)))
1197 };
1198 let tab_size = NonZeroU32::new(rng.gen_range(1..=4)).unwrap();
1199 let font = font("Helvetica");
1200 let _font_id = text_system.font_id(&font);
1201 let font_size = px(14.0);
1202
1203 log::info!("Tab size: {}", tab_size);
1204 log::info!("Wrap width: {:?}", wrap_width);
1205
1206 let buffer = cx.update(|cx| {
1207 if rng.gen() {
1208 MultiBuffer::build_random(&mut rng, cx)
1209 } else {
1210 let len = rng.gen_range(0..10);
1211 let text = util::RandomCharIter::new(&mut rng)
1212 .take(len)
1213 .collect::<String>();
1214 MultiBuffer::build_simple(&text, cx)
1215 }
1216 });
1217 let mut buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
1218 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1219 let (mut inlay_map, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
1220 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1221 let (mut fold_map, fold_snapshot) = FoldMap::new(inlay_snapshot.clone());
1222 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1223 let (mut char_map, _) = CharMap::new(fold_snapshot.clone(), tab_size);
1224 let tabs_snapshot = char_map.set_max_expansion_column(32);
1225 log::info!("CharMap text: {:?}", tabs_snapshot.text());
1226
1227 let mut line_wrapper = text_system.line_wrapper(font.clone(), font_size);
1228 let unwrapped_text = tabs_snapshot.text();
1229 let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
1230
1231 let (wrap_map, _) =
1232 cx.update(|cx| WrapMap::new(tabs_snapshot.clone(), font, font_size, wrap_width, cx));
1233 let mut notifications = observe(&wrap_map, cx);
1234
1235 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1236 notifications.next().await.unwrap();
1237 }
1238
1239 let (initial_snapshot, _) = wrap_map.update(cx, |map, cx| {
1240 assert!(!map.is_rewrapping());
1241 map.sync(tabs_snapshot.clone(), Vec::new(), cx)
1242 });
1243
1244 let actual_text = initial_snapshot.text();
1245 assert_eq!(
1246 actual_text, expected_text,
1247 "unwrapped text is: {:?}",
1248 unwrapped_text
1249 );
1250 log::info!("Wrapped text: {:?}", actual_text);
1251
1252 let mut next_inlay_id = 0;
1253 let mut edits = Vec::new();
1254 for _i in 0..operations {
1255 log::info!("{} ==============================================", _i);
1256
1257 let mut buffer_edits = Vec::new();
1258 match rng.gen_range(0..=100) {
1259 0..=19 => {
1260 wrap_width = if rng.gen_bool(0.2) {
1261 None
1262 } else {
1263 Some(px(rng.gen_range(0.0..=1000.0)))
1264 };
1265 log::info!("Setting wrap width to {:?}", wrap_width);
1266 wrap_map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
1267 }
1268 20..=39 => {
1269 for (fold_snapshot, fold_edits) in fold_map.randomly_mutate(&mut rng) {
1270 let (tabs_snapshot, tab_edits) =
1271 char_map.sync(fold_snapshot, fold_edits, tab_size);
1272 let (mut snapshot, wrap_edits) =
1273 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1274 snapshot.check_invariants();
1275 snapshot.verify_chunks(&mut rng);
1276 edits.push((snapshot, wrap_edits));
1277 }
1278 }
1279 40..=59 => {
1280 let (inlay_snapshot, inlay_edits) =
1281 inlay_map.randomly_mutate(&mut next_inlay_id, &mut rng);
1282 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1283 let (tabs_snapshot, tab_edits) =
1284 char_map.sync(fold_snapshot, fold_edits, tab_size);
1285 let (mut snapshot, wrap_edits) =
1286 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1287 snapshot.check_invariants();
1288 snapshot.verify_chunks(&mut rng);
1289 edits.push((snapshot, wrap_edits));
1290 }
1291 _ => {
1292 buffer.update(cx, |buffer, cx| {
1293 let subscription = buffer.subscribe();
1294 let edit_count = rng.gen_range(1..=5);
1295 buffer.randomly_mutate(&mut rng, edit_count, cx);
1296 buffer_snapshot = buffer.snapshot(cx);
1297 buffer_edits.extend(subscription.consume());
1298 });
1299 }
1300 }
1301
1302 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1303 let (inlay_snapshot, inlay_edits) =
1304 inlay_map.sync(buffer_snapshot.clone(), buffer_edits);
1305 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1306 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1307 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1308 let (tabs_snapshot, tab_edits) = char_map.sync(fold_snapshot, fold_edits, tab_size);
1309 log::info!("CharMap text: {:?}", tabs_snapshot.text());
1310
1311 let unwrapped_text = tabs_snapshot.text();
1312 let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
1313 let (mut snapshot, wrap_edits) =
1314 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot.clone(), tab_edits, cx));
1315 snapshot.check_invariants();
1316 snapshot.verify_chunks(&mut rng);
1317 edits.push((snapshot, wrap_edits));
1318
1319 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) && rng.gen_bool(0.4) {
1320 log::info!("Waiting for wrapping to finish");
1321 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1322 notifications.next().await.unwrap();
1323 }
1324 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1325 }
1326
1327 if !wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1328 let (mut wrapped_snapshot, wrap_edits) =
1329 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, Vec::new(), cx));
1330 let actual_text = wrapped_snapshot.text();
1331 let actual_longest_row = wrapped_snapshot.longest_row();
1332 log::info!("Wrapping finished: {:?}", actual_text);
1333 wrapped_snapshot.check_invariants();
1334 wrapped_snapshot.verify_chunks(&mut rng);
1335 edits.push((wrapped_snapshot.clone(), wrap_edits));
1336 assert_eq!(
1337 actual_text, expected_text,
1338 "unwrapped text is: {:?}",
1339 unwrapped_text
1340 );
1341
1342 let mut summary = TextSummary::default();
1343 for (ix, item) in wrapped_snapshot
1344 .transforms
1345 .items(&())
1346 .into_iter()
1347 .enumerate()
1348 {
1349 summary += &item.summary.output;
1350 log::info!("{} summary: {:?}", ix, item.summary.output,);
1351 }
1352
1353 if tab_size.get() == 1
1354 || !wrapped_snapshot
1355 .char_snapshot
1356 .fold_snapshot
1357 .text()
1358 .contains('\t')
1359 {
1360 let mut expected_longest_rows = Vec::new();
1361 let mut longest_line_len = -1;
1362 for (row, line) in expected_text.split('\n').enumerate() {
1363 let line_char_count = line.chars().count() as isize;
1364 if line_char_count > longest_line_len {
1365 expected_longest_rows.clear();
1366 longest_line_len = line_char_count;
1367 }
1368 if line_char_count >= longest_line_len {
1369 expected_longest_rows.push(row as u32);
1370 }
1371 }
1372
1373 assert!(
1374 expected_longest_rows.contains(&actual_longest_row),
1375 "incorrect longest row {}. expected {:?} with length {}",
1376 actual_longest_row,
1377 expected_longest_rows,
1378 longest_line_len,
1379 )
1380 }
1381 }
1382 }
1383
1384 let mut initial_text = Rope::from(initial_snapshot.text().as_str());
1385 for (snapshot, patch) in edits {
1386 let snapshot_text = Rope::from(snapshot.text().as_str());
1387 for edit in &patch {
1388 let old_start = initial_text.point_to_offset(Point::new(edit.new.start, 0));
1389 let old_end = initial_text.point_to_offset(cmp::min(
1390 Point::new(edit.new.start + edit.old.len() as u32, 0),
1391 initial_text.max_point(),
1392 ));
1393 let new_start = snapshot_text.point_to_offset(Point::new(edit.new.start, 0));
1394 let new_end = snapshot_text.point_to_offset(cmp::min(
1395 Point::new(edit.new.end, 0),
1396 snapshot_text.max_point(),
1397 ));
1398 let new_text = snapshot_text
1399 .chunks_in_range(new_start..new_end)
1400 .collect::<String>();
1401
1402 initial_text.replace(old_start..old_end, &new_text);
1403 }
1404 assert_eq!(initial_text.to_string(), snapshot_text.to_string());
1405 }
1406
1407 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1408 log::info!("Waiting for wrapping to finish");
1409 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1410 notifications.next().await.unwrap();
1411 }
1412 }
1413 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1414 }
1415
1416 fn init_test(cx: &mut gpui::TestAppContext) {
1417 cx.update(|cx| {
1418 let settings = SettingsStore::test(cx);
1419 cx.set_global(settings);
1420 theme::init(LoadThemes::JustBase, cx);
1421 });
1422 }
1423
1424 fn wrap_text(
1425 unwrapped_text: &str,
1426 wrap_width: Option<Pixels>,
1427 line_wrapper: &mut LineWrapper,
1428 ) -> String {
1429 if let Some(wrap_width) = wrap_width {
1430 let mut wrapped_text = String::new();
1431 for (row, line) in unwrapped_text.split('\n').enumerate() {
1432 if row > 0 {
1433 wrapped_text.push('\n')
1434 }
1435
1436 let mut prev_ix = 0;
1437 for boundary in line_wrapper.wrap_line(line, wrap_width) {
1438 wrapped_text.push_str(&line[prev_ix..boundary.ix]);
1439 wrapped_text.push('\n');
1440 wrapped_text.push_str(&" ".repeat(boundary.next_indent as usize));
1441 prev_ix = boundary.ix;
1442 }
1443 wrapped_text.push_str(&line[prev_ix..]);
1444 }
1445 wrapped_text
1446 } else {
1447 unwrapped_text.to_string()
1448 }
1449 }
1450
1451 impl WrapSnapshot {
1452 fn verify_chunks(&mut self, rng: &mut impl Rng) {
1453 for _ in 0..5 {
1454 let mut end_row = rng.gen_range(0..=self.max_point().row());
1455 let start_row = rng.gen_range(0..=end_row);
1456 end_row += 1;
1457
1458 let mut expected_text = self.text_chunks(start_row).collect::<String>();
1459 if expected_text.ends_with('\n') {
1460 expected_text.push('\n');
1461 }
1462 let mut expected_text = expected_text
1463 .lines()
1464 .take((end_row - start_row) as usize)
1465 .collect::<Vec<_>>()
1466 .join("\n");
1467 if end_row <= self.max_point().row() {
1468 expected_text.push('\n');
1469 }
1470
1471 let actual_text = self
1472 .chunks(start_row..end_row, true, Highlights::default())
1473 .map(|c| c.text)
1474 .collect::<String>();
1475 assert_eq!(
1476 expected_text,
1477 actual_text,
1478 "chunks != highlighted_chunks for rows {:?}",
1479 start_row..end_row
1480 );
1481 }
1482 }
1483 }
1484}