1use super::{
2 Highlights,
3 dimensions::RowDelta,
4 fold_map::{Chunk, FoldRows},
5 tab_map::{self, TabEdit, TabPoint, TabSnapshot},
6};
7use gpui::{App, AppContext as _, Context, Entity, Font, LineWrapper, Pixels, Task};
8use language::Point;
9use multi_buffer::{MultiBufferSnapshot, RowInfo};
10use smol::future::yield_now;
11use std::{cmp, collections::VecDeque, mem, ops::Range, sync::LazyLock, time::Duration};
12use sum_tree::{Bias, Cursor, Dimensions, SumTree};
13use text::Patch;
14
15pub use super::tab_map::TextSummary;
16pub type WrapEdit = text::Edit<WrapRow>;
17pub type WrapPatch = text::Patch<WrapRow>;
18
19#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
20pub struct WrapRow(pub u32);
21
22impl_for_row_types! {
23 WrapRow => RowDelta
24}
25
26/// Handles soft wrapping of text.
27///
28/// See the [`display_map` module documentation](crate::display_map) for more information.
29pub struct WrapMap {
30 snapshot: WrapSnapshot,
31 pending_edits: VecDeque<(TabSnapshot, Vec<TabEdit>)>,
32 interpolated_edits: WrapPatch,
33 edits_since_sync: WrapPatch,
34 wrap_width: Option<Pixels>,
35 background_task: Option<Task<()>>,
36 font_with_size: (Font, Pixels),
37}
38
39#[derive(Clone)]
40pub struct WrapSnapshot {
41 pub(super) tab_snapshot: TabSnapshot,
42 transforms: SumTree<Transform>,
43 interpolated: bool,
44}
45
46#[derive(Clone, Debug, Default, Eq, PartialEq)]
47struct Transform {
48 summary: TransformSummary,
49 display_text: Option<&'static str>,
50}
51
52#[derive(Clone, Debug, Default, Eq, PartialEq)]
53struct TransformSummary {
54 input: TextSummary,
55 output: TextSummary,
56}
57
58#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
59pub struct WrapPoint(pub Point);
60
61pub struct WrapChunks<'a> {
62 input_chunks: tab_map::TabChunks<'a>,
63 input_chunk: Chunk<'a>,
64 output_position: WrapPoint,
65 max_output_row: WrapRow,
66 transforms: Cursor<'a, 'static, Transform, Dimensions<WrapPoint, TabPoint>>,
67 snapshot: &'a WrapSnapshot,
68}
69
70#[derive(Clone)]
71pub struct WrapRows<'a> {
72 input_buffer_rows: FoldRows<'a>,
73 input_buffer_row: RowInfo,
74 output_row: WrapRow,
75 soft_wrapped: bool,
76 max_output_row: WrapRow,
77 transforms: Cursor<'a, 'static, Transform, Dimensions<WrapPoint, TabPoint>>,
78}
79
80impl WrapRows<'_> {
81 pub(crate) fn seek(&mut self, start_row: WrapRow) {
82 self.transforms
83 .seek(&WrapPoint::new(start_row, 0), Bias::Left);
84 let mut input_row = self.transforms.start().1.row();
85 if self.transforms.item().is_some_and(|t| t.is_isomorphic()) {
86 input_row += (start_row - self.transforms.start().0.row()).0;
87 }
88 self.soft_wrapped = self.transforms.item().is_some_and(|t| !t.is_isomorphic());
89 self.input_buffer_rows.seek(input_row);
90 self.input_buffer_row = self.input_buffer_rows.next().unwrap();
91 self.output_row = start_row;
92 }
93}
94
95impl WrapMap {
96 pub fn new(
97 tab_snapshot: TabSnapshot,
98 font: Font,
99 font_size: Pixels,
100 wrap_width: Option<Pixels>,
101 cx: &mut App,
102 ) -> (Entity<Self>, WrapSnapshot) {
103 let handle = cx.new(|cx| {
104 let mut this = Self {
105 font_with_size: (font, font_size),
106 wrap_width: None,
107 pending_edits: Default::default(),
108 interpolated_edits: Default::default(),
109 edits_since_sync: Default::default(),
110 snapshot: WrapSnapshot::new(tab_snapshot),
111 background_task: None,
112 };
113 this.set_wrap_width(wrap_width, cx);
114 mem::take(&mut this.edits_since_sync);
115 this
116 });
117 let snapshot = handle.read(cx).snapshot.clone();
118 (handle, snapshot)
119 }
120
121 #[cfg(test)]
122 pub fn is_rewrapping(&self) -> bool {
123 self.background_task.is_some()
124 }
125
126 pub fn sync(
127 &mut self,
128 tab_snapshot: TabSnapshot,
129 edits: Vec<TabEdit>,
130 cx: &mut Context<Self>,
131 ) -> (WrapSnapshot, WrapPatch) {
132 if self.wrap_width.is_some() {
133 self.pending_edits.push_back((tab_snapshot, edits));
134 self.flush_edits(cx);
135 } else {
136 self.edits_since_sync = self
137 .edits_since_sync
138 .compose(self.snapshot.interpolate(tab_snapshot, &edits));
139 self.snapshot.interpolated = false;
140 }
141
142 (self.snapshot.clone(), mem::take(&mut self.edits_since_sync))
143 }
144
145 pub fn set_font_with_size(
146 &mut self,
147 font: Font,
148 font_size: Pixels,
149 cx: &mut Context<Self>,
150 ) -> bool {
151 let font_with_size = (font, font_size);
152
153 if font_with_size == self.font_with_size {
154 false
155 } else {
156 self.font_with_size = font_with_size;
157 self.rewrap(cx);
158 true
159 }
160 }
161
162 pub fn set_wrap_width(&mut self, wrap_width: Option<Pixels>, cx: &mut Context<Self>) -> bool {
163 if wrap_width == self.wrap_width {
164 return false;
165 }
166
167 self.wrap_width = wrap_width;
168 self.rewrap(cx);
169 true
170 }
171
172 fn rewrap(&mut self, cx: &mut Context<Self>) {
173 self.background_task.take();
174 self.interpolated_edits.clear();
175 self.pending_edits.clear();
176
177 if let Some(wrap_width) = self.wrap_width {
178 let mut new_snapshot = self.snapshot.clone();
179
180 let text_system = cx.text_system().clone();
181 let (font, font_size) = self.font_with_size.clone();
182 let task = cx.background_spawn(async move {
183 let mut line_wrapper = text_system.line_wrapper(font, font_size);
184 let tab_snapshot = new_snapshot.tab_snapshot.clone();
185 let range = TabPoint::zero()..tab_snapshot.max_point();
186 let edits = new_snapshot
187 .update(
188 tab_snapshot,
189 &[TabEdit {
190 old: range.clone(),
191 new: range.clone(),
192 }],
193 wrap_width,
194 &mut line_wrapper,
195 )
196 .await;
197 (new_snapshot, edits)
198 });
199
200 match cx
201 .background_executor()
202 .block_with_timeout(Duration::from_millis(5), task)
203 {
204 Ok((snapshot, edits)) => {
205 self.snapshot = snapshot;
206 self.edits_since_sync = self.edits_since_sync.compose(&edits);
207 }
208 Err(wrap_task) => {
209 self.background_task = Some(cx.spawn(async move |this, cx| {
210 let (snapshot, edits) = wrap_task.await;
211 this.update(cx, |this, cx| {
212 this.snapshot = snapshot;
213 this.edits_since_sync = this
214 .edits_since_sync
215 .compose(mem::take(&mut this.interpolated_edits).invert())
216 .compose(&edits);
217 this.background_task = None;
218 this.flush_edits(cx);
219 cx.notify();
220 })
221 .ok();
222 }));
223 }
224 }
225 } else {
226 let old_rows = self.snapshot.transforms.summary().output.lines.row + 1;
227 self.snapshot.transforms = SumTree::default();
228 let summary = self.snapshot.tab_snapshot.text_summary();
229 if !summary.lines.is_zero() {
230 self.snapshot
231 .transforms
232 .push(Transform::isomorphic(summary), ());
233 }
234 let new_rows = self.snapshot.transforms.summary().output.lines.row + 1;
235 self.snapshot.interpolated = false;
236 self.edits_since_sync = self.edits_since_sync.compose(Patch::new(vec![WrapEdit {
237 old: WrapRow(0)..WrapRow(old_rows),
238 new: WrapRow(0)..WrapRow(new_rows),
239 }]));
240 }
241 }
242
243 fn flush_edits(&mut self, cx: &mut Context<Self>) {
244 if !self.snapshot.interpolated {
245 let mut to_remove_len = 0;
246 for (tab_snapshot, _) in &self.pending_edits {
247 if tab_snapshot.version <= self.snapshot.tab_snapshot.version {
248 to_remove_len += 1;
249 } else {
250 break;
251 }
252 }
253 self.pending_edits.drain(..to_remove_len);
254 }
255
256 if self.pending_edits.is_empty() {
257 return;
258 }
259
260 if let Some(wrap_width) = self.wrap_width
261 && self.background_task.is_none()
262 {
263 let pending_edits = self.pending_edits.clone();
264 let mut snapshot = self.snapshot.clone();
265 let text_system = cx.text_system().clone();
266 let (font, font_size) = self.font_with_size.clone();
267 let update_task = cx.background_spawn(async move {
268 let mut edits = Patch::default();
269 let mut line_wrapper = text_system.line_wrapper(font, font_size);
270 for (tab_snapshot, tab_edits) in pending_edits {
271 let wrap_edits = snapshot
272 .update(tab_snapshot, &tab_edits, wrap_width, &mut line_wrapper)
273 .await;
274 edits = edits.compose(&wrap_edits);
275 }
276 (snapshot, edits)
277 });
278
279 match cx
280 .background_executor()
281 .block_with_timeout(Duration::from_millis(1), update_task)
282 {
283 Ok((snapshot, output_edits)) => {
284 self.snapshot = snapshot;
285 self.edits_since_sync = self.edits_since_sync.compose(&output_edits);
286 }
287 Err(update_task) => {
288 self.background_task = Some(cx.spawn(async move |this, cx| {
289 let (snapshot, edits) = update_task.await;
290 this.update(cx, |this, cx| {
291 this.snapshot = snapshot;
292 this.edits_since_sync = this
293 .edits_since_sync
294 .compose(mem::take(&mut this.interpolated_edits).invert())
295 .compose(&edits);
296 this.background_task = None;
297 this.flush_edits(cx);
298 cx.notify();
299 })
300 .ok();
301 }));
302 }
303 }
304 }
305
306 let was_interpolated = self.snapshot.interpolated;
307 let mut to_remove_len = 0;
308 for (tab_snapshot, edits) in &self.pending_edits {
309 if tab_snapshot.version <= self.snapshot.tab_snapshot.version {
310 to_remove_len += 1;
311 } else {
312 let interpolated_edits = self.snapshot.interpolate(tab_snapshot.clone(), edits);
313 self.edits_since_sync = self.edits_since_sync.compose(&interpolated_edits);
314 self.interpolated_edits = self.interpolated_edits.compose(&interpolated_edits);
315 }
316 }
317
318 if !was_interpolated {
319 self.pending_edits.drain(..to_remove_len);
320 }
321 }
322}
323
324impl WrapSnapshot {
325 fn new(tab_snapshot: TabSnapshot) -> Self {
326 let mut transforms = SumTree::default();
327 let extent = tab_snapshot.text_summary();
328 if !extent.lines.is_zero() {
329 transforms.push(Transform::isomorphic(extent), ());
330 }
331 Self {
332 transforms,
333 tab_snapshot,
334 interpolated: true,
335 }
336 }
337
338 pub fn buffer_snapshot(&self) -> &MultiBufferSnapshot {
339 self.tab_snapshot.buffer_snapshot()
340 }
341
342 fn interpolate(&mut self, new_tab_snapshot: TabSnapshot, tab_edits: &[TabEdit]) -> WrapPatch {
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::<TabPoint>(());
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 > TabPoint::from(new_transforms.summary().input.lines) {
355 let summary = new_tab_snapshot.text_summary_for_range(
356 TabPoint::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_tab_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 .tab_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
379 .append(old_cursor.slice(&next_edit.old.start, Bias::Right), ());
380 }
381 } else {
382 if old_cursor.end() > edit.old.end {
383 let summary = self
384 .tab_snapshot
385 .text_summary_for_range(edit.old.end..old_cursor.end());
386 new_transforms.push_or_extend(Transform::isomorphic(summary));
387 }
388 old_cursor.next();
389 new_transforms.append(old_cursor.suffix(), ());
390 }
391 }
392 }
393
394 let old_snapshot = mem::replace(
395 self,
396 WrapSnapshot {
397 tab_snapshot: new_tab_snapshot,
398 transforms: new_transforms,
399 interpolated: true,
400 },
401 );
402 self.check_invariants();
403 old_snapshot.compute_edits(tab_edits, self)
404 }
405
406 async fn update(
407 &mut self,
408 new_tab_snapshot: TabSnapshot,
409 tab_edits: &[TabEdit],
410 wrap_width: Pixels,
411 line_wrapper: &mut LineWrapper,
412 ) -> WrapPatch {
413 #[derive(Debug)]
414 struct RowEdit {
415 old_rows: Range<u32>,
416 new_rows: Range<u32>,
417 }
418
419 let mut tab_edits_iter = tab_edits.iter().peekable();
420 let mut row_edits = Vec::with_capacity(tab_edits.len());
421 while let Some(edit) = tab_edits_iter.next() {
422 let mut row_edit = RowEdit {
423 old_rows: edit.old.start.row()..edit.old.end.row() + 1,
424 new_rows: edit.new.start.row()..edit.new.end.row() + 1,
425 };
426
427 while let Some(next_edit) = tab_edits_iter.peek() {
428 if next_edit.old.start.row() <= row_edit.old_rows.end {
429 row_edit.old_rows.end = next_edit.old.end.row() + 1;
430 row_edit.new_rows.end = next_edit.new.end.row() + 1;
431 tab_edits_iter.next();
432 } else {
433 break;
434 }
435 }
436
437 row_edits.push(row_edit);
438 }
439
440 let mut new_transforms;
441 if row_edits.is_empty() {
442 new_transforms = self.transforms.clone();
443 } else {
444 let mut row_edits = row_edits.into_iter().peekable();
445 let mut old_cursor = self.transforms.cursor::<TabPoint>(());
446
447 new_transforms = old_cursor.slice(
448 &TabPoint::new(row_edits.peek().unwrap().old_rows.start, 0),
449 Bias::Right,
450 );
451
452 while let Some(edit) = row_edits.next() {
453 if edit.new_rows.start > new_transforms.summary().input.lines.row {
454 let summary = new_tab_snapshot.text_summary_for_range(
455 TabPoint(new_transforms.summary().input.lines)
456 ..TabPoint::new(edit.new_rows.start, 0),
457 );
458 new_transforms.push_or_extend(Transform::isomorphic(summary));
459 }
460
461 let mut line = String::new();
462 let mut line_fragments = Vec::new();
463 let mut remaining = None;
464 let mut chunks = new_tab_snapshot.chunks(
465 TabPoint::new(edit.new_rows.start, 0)..new_tab_snapshot.max_point(),
466 false,
467 Highlights::default(),
468 );
469 let mut edit_transforms = Vec::<Transform>::new();
470 for _ in edit.new_rows.start..edit.new_rows.end {
471 while let Some(chunk) = remaining.take().or_else(|| chunks.next()) {
472 if let Some(ix) = chunk.text.find('\n') {
473 let (prefix, suffix) = chunk.text.split_at(ix + 1);
474 line_fragments.push(gpui::LineFragment::text(prefix));
475 line.push_str(prefix);
476 remaining = Some(Chunk {
477 text: suffix,
478 ..chunk
479 });
480 break;
481 } else {
482 if let Some(width) =
483 chunk.renderer.as_ref().and_then(|r| r.measured_width)
484 {
485 line_fragments
486 .push(gpui::LineFragment::element(width, chunk.text.len()));
487 } else {
488 line_fragments.push(gpui::LineFragment::text(chunk.text));
489 }
490 line.push_str(chunk.text);
491 }
492 }
493
494 if line.is_empty() {
495 break;
496 }
497
498 let mut prev_boundary_ix = 0;
499 for boundary in line_wrapper.wrap_line(&line_fragments, wrap_width) {
500 let wrapped = &line[prev_boundary_ix..boundary.ix];
501 push_isomorphic(&mut edit_transforms, TextSummary::from(wrapped));
502 edit_transforms.push(Transform::wrap(boundary.next_indent));
503 prev_boundary_ix = boundary.ix;
504 }
505
506 if prev_boundary_ix < line.len() {
507 push_isomorphic(
508 &mut edit_transforms,
509 TextSummary::from(&line[prev_boundary_ix..]),
510 );
511 }
512
513 line.clear();
514 line_fragments.clear();
515 yield_now().await;
516 }
517
518 let mut edit_transforms = edit_transforms.into_iter();
519 if let Some(transform) = edit_transforms.next() {
520 new_transforms.push_or_extend(transform);
521 }
522 new_transforms.extend(edit_transforms, ());
523
524 old_cursor.seek_forward(&TabPoint::new(edit.old_rows.end, 0), Bias::Right);
525 if let Some(next_edit) = row_edits.peek() {
526 if next_edit.old_rows.start > old_cursor.end().row() {
527 if old_cursor.end() > TabPoint::new(edit.old_rows.end, 0) {
528 let summary = self.tab_snapshot.text_summary_for_range(
529 TabPoint::new(edit.old_rows.end, 0)..old_cursor.end(),
530 );
531 new_transforms.push_or_extend(Transform::isomorphic(summary));
532 }
533 old_cursor.next();
534 new_transforms.append(
535 old_cursor
536 .slice(&TabPoint::new(next_edit.old_rows.start, 0), Bias::Right),
537 (),
538 );
539 }
540 } else {
541 if old_cursor.end() > TabPoint::new(edit.old_rows.end, 0) {
542 let summary = self.tab_snapshot.text_summary_for_range(
543 TabPoint::new(edit.old_rows.end, 0)..old_cursor.end(),
544 );
545 new_transforms.push_or_extend(Transform::isomorphic(summary));
546 }
547 old_cursor.next();
548 new_transforms.append(old_cursor.suffix(), ());
549 }
550 }
551 }
552
553 let old_snapshot = mem::replace(
554 self,
555 WrapSnapshot {
556 tab_snapshot: new_tab_snapshot,
557 transforms: new_transforms,
558 interpolated: false,
559 },
560 );
561 self.check_invariants();
562 old_snapshot.compute_edits(tab_edits, self)
563 }
564
565 fn compute_edits(&self, tab_edits: &[TabEdit], new_snapshot: &WrapSnapshot) -> WrapPatch {
566 let mut wrap_edits = Vec::with_capacity(tab_edits.len());
567 let mut old_cursor = self.transforms.cursor::<TransformSummary>(());
568 let mut new_cursor = new_snapshot.transforms.cursor::<TransformSummary>(());
569 for mut tab_edit in tab_edits.iter().cloned() {
570 tab_edit.old.start.0.column = 0;
571 tab_edit.old.end.0 += Point::new(1, 0);
572 tab_edit.new.start.0.column = 0;
573 tab_edit.new.end.0 += Point::new(1, 0);
574
575 old_cursor.seek(&tab_edit.old.start, Bias::Right);
576 let mut old_start = old_cursor.start().output.lines;
577 old_start += tab_edit.old.start.0 - old_cursor.start().input.lines;
578
579 old_cursor.seek_forward(&tab_edit.old.end, Bias::Right);
580 let mut old_end = old_cursor.start().output.lines;
581 old_end += tab_edit.old.end.0 - old_cursor.start().input.lines;
582
583 new_cursor.seek(&tab_edit.new.start, Bias::Right);
584 let mut new_start = new_cursor.start().output.lines;
585 new_start += tab_edit.new.start.0 - new_cursor.start().input.lines;
586
587 new_cursor.seek_forward(&tab_edit.new.end, Bias::Right);
588 let mut new_end = new_cursor.start().output.lines;
589 new_end += tab_edit.new.end.0 - new_cursor.start().input.lines;
590
591 wrap_edits.push(WrapEdit {
592 old: WrapRow(old_start.row)..WrapRow(old_end.row),
593 new: WrapRow(new_start.row)..WrapRow(new_end.row),
594 });
595 }
596
597 wrap_edits = consolidate_wrap_edits(wrap_edits);
598 Patch::new(wrap_edits)
599 }
600
601 pub(crate) fn chunks<'a>(
602 &'a self,
603 rows: Range<WrapRow>,
604 language_aware: bool,
605 highlights: Highlights<'a>,
606 ) -> WrapChunks<'a> {
607 let output_start = WrapPoint::new(rows.start, 0);
608 let output_end = WrapPoint::new(rows.end, 0);
609 let mut transforms = self
610 .transforms
611 .cursor::<Dimensions<WrapPoint, TabPoint>>(());
612 transforms.seek(&output_start, Bias::Right);
613 let mut input_start = TabPoint(transforms.start().1.0);
614 if transforms.item().is_some_and(|t| t.is_isomorphic()) {
615 input_start.0 += output_start.0 - transforms.start().0.0;
616 }
617 let input_end = self
618 .to_tab_point(output_end)
619 .min(self.tab_snapshot.max_point());
620 WrapChunks {
621 input_chunks: self.tab_snapshot.chunks(
622 input_start..input_end,
623 language_aware,
624 highlights,
625 ),
626 input_chunk: Default::default(),
627 output_position: output_start,
628 max_output_row: rows.end,
629 transforms,
630 snapshot: self,
631 }
632 }
633
634 pub fn max_point(&self) -> WrapPoint {
635 WrapPoint(self.transforms.summary().output.lines)
636 }
637
638 pub fn line_len(&self, row: WrapRow) -> u32 {
639 let (start, _, item) = self.transforms.find::<Dimensions<WrapPoint, TabPoint>, _>(
640 (),
641 &WrapPoint::new(row + WrapRow(1), 0),
642 Bias::Left,
643 );
644 if item.is_some_and(|transform| transform.is_isomorphic()) {
645 let overshoot = row - start.0.row();
646 let tab_row = start.1.row() + overshoot.0;
647 let tab_line_len = self.tab_snapshot.line_len(tab_row);
648 if overshoot.0 == 0 {
649 start.0.column() + (tab_line_len - start.1.column())
650 } else {
651 tab_line_len
652 }
653 } else {
654 start.0.column()
655 }
656 }
657
658 pub fn text_summary_for_range(&self, rows: Range<WrapRow>) -> TextSummary {
659 let mut summary = TextSummary::default();
660
661 let start = WrapPoint::new(rows.start, 0);
662 let end = WrapPoint::new(rows.end, 0);
663
664 let mut cursor = self
665 .transforms
666 .cursor::<Dimensions<WrapPoint, TabPoint>>(());
667 cursor.seek(&start, Bias::Right);
668 if let Some(transform) = cursor.item() {
669 let start_in_transform = start.0 - cursor.start().0.0;
670 let end_in_transform = cmp::min(end, cursor.end().0).0 - cursor.start().0.0;
671 if transform.is_isomorphic() {
672 let tab_start = TabPoint(cursor.start().1.0 + start_in_transform);
673 let tab_end = TabPoint(cursor.start().1.0 + end_in_transform);
674 summary += &self.tab_snapshot.text_summary_for_range(tab_start..tab_end);
675 } else {
676 debug_assert_eq!(start_in_transform.row, end_in_transform.row);
677 let indent_len = end_in_transform.column - start_in_transform.column;
678 summary += &TextSummary {
679 lines: Point::new(0, indent_len),
680 first_line_chars: indent_len,
681 last_line_chars: indent_len,
682 longest_row: 0,
683 longest_row_chars: indent_len,
684 };
685 }
686
687 cursor.next();
688 }
689
690 if rows.end > cursor.start().0.row() {
691 summary += &cursor
692 .summary::<_, TransformSummary>(&WrapPoint::new(rows.end, 0), Bias::Right)
693 .output;
694
695 if let Some(transform) = cursor.item() {
696 let end_in_transform = end.0 - cursor.start().0.0;
697 if transform.is_isomorphic() {
698 let char_start = cursor.start().1;
699 let char_end = TabPoint(char_start.0 + end_in_transform);
700 summary += &self
701 .tab_snapshot
702 .text_summary_for_range(char_start..char_end);
703 } else {
704 debug_assert_eq!(end_in_transform, Point::new(1, 0));
705 summary += &TextSummary {
706 lines: Point::new(1, 0),
707 first_line_chars: 0,
708 last_line_chars: 0,
709 longest_row: 0,
710 longest_row_chars: 0,
711 };
712 }
713 }
714 }
715
716 summary
717 }
718
719 pub fn soft_wrap_indent(&self, row: WrapRow) -> Option<u32> {
720 let (.., item) = self.transforms.find::<WrapPoint, _>(
721 (),
722 &WrapPoint::new(row + WrapRow(1), 0),
723 Bias::Right,
724 );
725 item.and_then(|transform| {
726 if transform.is_isomorphic() {
727 None
728 } else {
729 Some(transform.summary.output.lines.column)
730 }
731 })
732 }
733
734 pub fn longest_row(&self) -> u32 {
735 self.transforms.summary().output.longest_row
736 }
737
738 pub fn row_infos(&self, start_row: WrapRow) -> WrapRows<'_> {
739 let mut transforms = self
740 .transforms
741 .cursor::<Dimensions<WrapPoint, TabPoint>>(());
742 transforms.seek(&WrapPoint::new(start_row, 0), Bias::Left);
743 let mut input_row = transforms.start().1.row();
744 if transforms.item().is_some_and(|t| t.is_isomorphic()) {
745 input_row += (start_row - transforms.start().0.row()).0;
746 }
747 let soft_wrapped = transforms.item().is_some_and(|t| !t.is_isomorphic());
748 let mut input_buffer_rows = self.tab_snapshot.rows(input_row);
749 let input_buffer_row = input_buffer_rows.next().unwrap();
750 WrapRows {
751 transforms,
752 input_buffer_row,
753 input_buffer_rows,
754 output_row: start_row,
755 soft_wrapped,
756 max_output_row: self.max_point().row(),
757 }
758 }
759
760 pub fn to_tab_point(&self, point: WrapPoint) -> TabPoint {
761 let (start, _, item) =
762 self.transforms
763 .find::<Dimensions<WrapPoint, TabPoint>, _>((), &point, Bias::Right);
764 let mut tab_point = start.1.0;
765 if item.is_some_and(|t| t.is_isomorphic()) {
766 tab_point += point.0 - start.0.0;
767 }
768 TabPoint(tab_point)
769 }
770
771 pub fn to_point(&self, point: WrapPoint, bias: Bias) -> Point {
772 self.tab_snapshot.to_point(self.to_tab_point(point), bias)
773 }
774
775 pub fn make_wrap_point(&self, point: Point, bias: Bias) -> WrapPoint {
776 self.tab_point_to_wrap_point(self.tab_snapshot.make_tab_point(point, bias))
777 }
778
779 pub fn tab_point_to_wrap_point(&self, point: TabPoint) -> WrapPoint {
780 let (start, ..) =
781 self.transforms
782 .find::<Dimensions<TabPoint, WrapPoint>, _>((), &point, Bias::Right);
783 WrapPoint(start.1.0 + (point.0 - start.0.0))
784 }
785
786 pub fn clip_point(&self, mut point: WrapPoint, bias: Bias) -> WrapPoint {
787 if bias == Bias::Left {
788 let (start, _, item) = self
789 .transforms
790 .find::<WrapPoint, _>((), &point, Bias::Right);
791 if item.is_some_and(|t| !t.is_isomorphic()) {
792 point = start;
793 *point.column_mut() -= 1;
794 }
795 }
796
797 self.tab_point_to_wrap_point(self.tab_snapshot.clip_point(self.to_tab_point(point), bias))
798 }
799
800 pub fn prev_row_boundary(&self, mut point: WrapPoint) -> WrapRow {
801 if self.transforms.is_empty() {
802 return WrapRow(0);
803 }
804
805 *point.column_mut() = 0;
806
807 let mut cursor = self
808 .transforms
809 .cursor::<Dimensions<WrapPoint, TabPoint>>(());
810 cursor.seek(&point, Bias::Right);
811 if cursor.item().is_none() {
812 cursor.prev();
813 }
814
815 while let Some(transform) = cursor.item() {
816 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
817 return cmp::min(cursor.end().0.row(), point.row());
818 } else {
819 cursor.prev();
820 }
821 }
822
823 unreachable!()
824 }
825
826 pub fn next_row_boundary(&self, mut point: WrapPoint) -> Option<WrapRow> {
827 point.0 += Point::new(1, 0);
828
829 let mut cursor = self
830 .transforms
831 .cursor::<Dimensions<WrapPoint, TabPoint>>(());
832 cursor.seek(&point, Bias::Right);
833 while let Some(transform) = cursor.item() {
834 if transform.is_isomorphic() && cursor.start().1.column() == 0 {
835 return Some(cmp::max(cursor.start().0.row(), point.row()));
836 } else {
837 cursor.next();
838 }
839 }
840
841 None
842 }
843
844 #[cfg(test)]
845 pub fn text(&self) -> String {
846 self.text_chunks(WrapRow(0)).collect()
847 }
848
849 #[cfg(test)]
850 pub fn text_chunks(&self, wrap_row: WrapRow) -> impl Iterator<Item = &str> {
851 self.chunks(
852 wrap_row..self.max_point().row() + WrapRow(1),
853 false,
854 Highlights::default(),
855 )
856 .map(|h| h.text)
857 }
858
859 fn check_invariants(&self) {
860 #[cfg(test)]
861 {
862 assert_eq!(
863 TabPoint::from(self.transforms.summary().input.lines),
864 self.tab_snapshot.max_point()
865 );
866
867 {
868 let mut transforms = self.transforms.cursor::<()>(()).peekable();
869 while let Some(transform) = transforms.next() {
870 if let Some(next_transform) = transforms.peek() {
871 assert!(transform.is_isomorphic() != next_transform.is_isomorphic());
872 }
873 }
874 }
875
876 let text = language::Rope::from(self.text().as_str());
877 let mut input_buffer_rows = self.tab_snapshot.rows(0);
878 let mut expected_buffer_rows = Vec::new();
879 let mut prev_tab_row = 0;
880 for display_row in 0..=self.max_point().row().0 {
881 let display_row = WrapRow(display_row);
882 let tab_point = self.to_tab_point(WrapPoint::new(display_row, 0));
883 if tab_point.row() == prev_tab_row && display_row != WrapRow(0) {
884 expected_buffer_rows.push(None);
885 } else {
886 expected_buffer_rows.push(input_buffer_rows.next().unwrap().buffer_row);
887 }
888
889 prev_tab_row = tab_point.row();
890 assert_eq!(self.line_len(display_row), text.line_len(display_row.0));
891 }
892
893 for start_display_row in 0..expected_buffer_rows.len() {
894 assert_eq!(
895 self.row_infos(WrapRow(start_display_row as u32))
896 .map(|row_info| row_info.buffer_row)
897 .collect::<Vec<_>>(),
898 &expected_buffer_rows[start_display_row..],
899 "invalid buffer_rows({}..)",
900 start_display_row
901 );
902 }
903 }
904 }
905}
906
907impl WrapChunks<'_> {
908 pub(crate) fn seek(&mut self, rows: Range<WrapRow>) {
909 let output_start = WrapPoint::new(rows.start, 0);
910 let output_end = WrapPoint::new(rows.end, 0);
911 self.transforms.seek(&output_start, Bias::Right);
912 let mut input_start = TabPoint(self.transforms.start().1.0);
913 if self.transforms.item().is_some_and(|t| t.is_isomorphic()) {
914 input_start.0 += output_start.0 - self.transforms.start().0.0;
915 }
916 let input_end = self
917 .snapshot
918 .to_tab_point(output_end)
919 .min(self.snapshot.tab_snapshot.max_point());
920 self.input_chunks.seek(input_start..input_end);
921 self.input_chunk = Chunk::default();
922 self.output_position = output_start;
923 self.max_output_row = rows.end;
924 }
925}
926
927impl<'a> Iterator for WrapChunks<'a> {
928 type Item = Chunk<'a>;
929
930 fn next(&mut self) -> Option<Self::Item> {
931 if self.output_position.row() >= self.max_output_row {
932 return None;
933 }
934
935 let transform = self.transforms.item()?;
936 if let Some(display_text) = transform.display_text {
937 let mut start_ix = 0;
938 let mut end_ix = display_text.len();
939 let mut summary = transform.summary.output.lines;
940
941 if self.output_position > self.transforms.start().0 {
942 // Exclude newline starting prior to the desired row.
943 start_ix = 1;
944 summary.row = 0;
945 } else if self.output_position.row() + WrapRow(1) >= self.max_output_row {
946 // Exclude soft indentation ending after the desired row.
947 end_ix = 1;
948 summary.column = 0;
949 }
950
951 self.output_position.0 += summary;
952 self.transforms.next();
953 return Some(Chunk {
954 text: &display_text[start_ix..end_ix],
955 ..Default::default()
956 });
957 }
958
959 if self.input_chunk.text.is_empty() {
960 self.input_chunk = self.input_chunks.next().unwrap();
961 }
962
963 let mut input_len = 0;
964 let transform_end = self.transforms.end().0;
965 for c in self.input_chunk.text.chars() {
966 let char_len = c.len_utf8();
967 input_len += char_len;
968 if c == '\n' {
969 *self.output_position.row_mut() += 1;
970 *self.output_position.column_mut() = 0;
971 } else {
972 *self.output_position.column_mut() += char_len as u32;
973 }
974
975 if self.output_position >= transform_end {
976 self.transforms.next();
977 break;
978 }
979 }
980
981 let (prefix, suffix) = self.input_chunk.text.split_at(input_len);
982
983 let mask = 1u128.unbounded_shl(input_len as u32).wrapping_sub(1);
984 let chars = self.input_chunk.chars & mask;
985 let tabs = self.input_chunk.tabs & mask;
986 self.input_chunk.tabs = self.input_chunk.tabs.unbounded_shr(input_len as u32);
987 self.input_chunk.chars = self.input_chunk.chars.unbounded_shr(input_len as u32);
988
989 self.input_chunk.text = suffix;
990 Some(Chunk {
991 text: prefix,
992 chars,
993 tabs,
994 ..self.input_chunk.clone()
995 })
996 }
997}
998
999impl Iterator for WrapRows<'_> {
1000 type Item = RowInfo;
1001
1002 fn next(&mut self) -> Option<Self::Item> {
1003 if self.output_row > self.max_output_row {
1004 return None;
1005 }
1006
1007 let buffer_row = self.input_buffer_row;
1008 let soft_wrapped = self.soft_wrapped;
1009 let diff_status = self.input_buffer_row.diff_status;
1010
1011 self.output_row += WrapRow(1);
1012 self.transforms
1013 .seek_forward(&WrapPoint::new(self.output_row, 0), Bias::Left);
1014 if self.transforms.item().is_some_and(|t| t.is_isomorphic()) {
1015 self.input_buffer_row = self.input_buffer_rows.next().unwrap();
1016 self.soft_wrapped = false;
1017 } else {
1018 self.soft_wrapped = true;
1019 }
1020
1021 Some(if soft_wrapped {
1022 RowInfo {
1023 buffer_id: None,
1024 buffer_row: None,
1025 multibuffer_row: None,
1026 diff_status,
1027 expand_info: None,
1028 }
1029 } else {
1030 buffer_row
1031 })
1032 }
1033}
1034
1035impl Transform {
1036 fn isomorphic(summary: TextSummary) -> Self {
1037 #[cfg(test)]
1038 assert!(!summary.lines.is_zero());
1039
1040 Self {
1041 summary: TransformSummary {
1042 input: summary.clone(),
1043 output: summary,
1044 },
1045 display_text: None,
1046 }
1047 }
1048
1049 fn wrap(indent: u32) -> Self {
1050 static WRAP_TEXT: LazyLock<String> = LazyLock::new(|| {
1051 let mut wrap_text = String::new();
1052 wrap_text.push('\n');
1053 wrap_text.extend((0..LineWrapper::MAX_INDENT as usize).map(|_| ' '));
1054 wrap_text
1055 });
1056
1057 Self {
1058 summary: TransformSummary {
1059 input: TextSummary::default(),
1060 output: TextSummary {
1061 lines: Point::new(1, indent),
1062 first_line_chars: 0,
1063 last_line_chars: indent,
1064 longest_row: 1,
1065 longest_row_chars: indent,
1066 },
1067 },
1068 display_text: Some(&WRAP_TEXT[..1 + indent as usize]),
1069 }
1070 }
1071
1072 fn is_isomorphic(&self) -> bool {
1073 self.display_text.is_none()
1074 }
1075}
1076
1077impl sum_tree::Item for Transform {
1078 type Summary = TransformSummary;
1079
1080 fn summary(&self, _cx: ()) -> Self::Summary {
1081 self.summary.clone()
1082 }
1083}
1084
1085fn push_isomorphic(transforms: &mut Vec<Transform>, summary: TextSummary) {
1086 if let Some(last_transform) = transforms.last_mut()
1087 && last_transform.is_isomorphic()
1088 {
1089 last_transform.summary.input += &summary;
1090 last_transform.summary.output += &summary;
1091 return;
1092 }
1093 transforms.push(Transform::isomorphic(summary));
1094}
1095
1096trait SumTreeExt {
1097 fn push_or_extend(&mut self, transform: Transform);
1098}
1099
1100impl SumTreeExt for SumTree<Transform> {
1101 fn push_or_extend(&mut self, transform: Transform) {
1102 let mut transform = Some(transform);
1103 self.update_last(
1104 |last_transform| {
1105 if last_transform.is_isomorphic() && transform.as_ref().unwrap().is_isomorphic() {
1106 let transform = transform.take().unwrap();
1107 last_transform.summary.input += &transform.summary.input;
1108 last_transform.summary.output += &transform.summary.output;
1109 }
1110 },
1111 (),
1112 );
1113
1114 if let Some(transform) = transform {
1115 self.push(transform, ());
1116 }
1117 }
1118}
1119
1120impl WrapPoint {
1121 pub fn new(row: WrapRow, column: u32) -> Self {
1122 Self(Point::new(row.0, column))
1123 }
1124
1125 pub fn row(self) -> WrapRow {
1126 WrapRow(self.0.row)
1127 }
1128
1129 pub fn row_mut(&mut self) -> &mut u32 {
1130 &mut self.0.row
1131 }
1132
1133 pub fn column(self) -> u32 {
1134 self.0.column
1135 }
1136
1137 pub fn column_mut(&mut self) -> &mut u32 {
1138 &mut self.0.column
1139 }
1140}
1141
1142impl sum_tree::ContextLessSummary for TransformSummary {
1143 fn zero() -> Self {
1144 Default::default()
1145 }
1146
1147 fn add_summary(&mut self, other: &Self) {
1148 self.input += &other.input;
1149 self.output += &other.output;
1150 }
1151}
1152
1153impl<'a> sum_tree::Dimension<'a, TransformSummary> for TabPoint {
1154 fn zero(_cx: ()) -> Self {
1155 Default::default()
1156 }
1157
1158 fn add_summary(&mut self, summary: &'a TransformSummary, _: ()) {
1159 self.0 += summary.input.lines;
1160 }
1161}
1162
1163impl sum_tree::SeekTarget<'_, TransformSummary, TransformSummary> for TabPoint {
1164 fn cmp(&self, cursor_location: &TransformSummary, _: ()) -> std::cmp::Ordering {
1165 Ord::cmp(&self.0, &cursor_location.input.lines)
1166 }
1167}
1168
1169impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapPoint {
1170 fn zero(_cx: ()) -> Self {
1171 Default::default()
1172 }
1173
1174 fn add_summary(&mut self, summary: &'a TransformSummary, _: ()) {
1175 self.0 += summary.output.lines;
1176 }
1177}
1178
1179fn consolidate_wrap_edits(edits: Vec<WrapEdit>) -> Vec<WrapEdit> {
1180 let _old_alloc_ptr = edits.as_ptr();
1181 let mut wrap_edits = edits.into_iter();
1182
1183 if let Some(mut first_edit) = wrap_edits.next() {
1184 // This code relies on reusing allocations from the Vec<_> - at the time of writing .flatten() prevents them.
1185 #[allow(clippy::filter_map_identity)]
1186 let mut v: Vec<_> = wrap_edits
1187 .scan(&mut first_edit, |prev_edit, edit| {
1188 if prev_edit.old.end >= edit.old.start {
1189 prev_edit.old.end = edit.old.end;
1190 prev_edit.new.end = edit.new.end;
1191 Some(None) // Skip this edit, it's merged
1192 } else {
1193 let prev = std::mem::replace(*prev_edit, edit);
1194 Some(Some(prev)) // Yield the previous edit
1195 }
1196 })
1197 .filter_map(|x| x)
1198 .collect();
1199 v.push(first_edit.clone());
1200 debug_assert_eq!(v.as_ptr(), _old_alloc_ptr, "Wrap edits were reallocated");
1201 v
1202 } else {
1203 vec![]
1204 }
1205}
1206
1207#[cfg(test)]
1208mod tests {
1209 use super::*;
1210 use crate::{
1211 MultiBuffer,
1212 display_map::{fold_map::FoldMap, inlay_map::InlayMap, tab_map::TabMap},
1213 test::test_font,
1214 };
1215 use gpui::{LineFragment, px, test::observe};
1216 use rand::prelude::*;
1217 use settings::SettingsStore;
1218 use smol::stream::StreamExt;
1219 use std::{cmp, env, num::NonZeroU32};
1220 use text::Rope;
1221 use theme::LoadThemes;
1222
1223 #[gpui::test(iterations = 100)]
1224 async fn test_random_wraps(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
1225 // todo this test is flaky
1226 init_test(cx);
1227
1228 cx.background_executor.set_block_on_ticks(0..=50);
1229 let operations = env::var("OPERATIONS")
1230 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
1231 .unwrap_or(10);
1232
1233 let text_system = cx.read(|cx| cx.text_system().clone());
1234 let mut wrap_width = if rng.random_bool(0.1) {
1235 None
1236 } else {
1237 Some(px(rng.random_range(0.0..=1000.0)))
1238 };
1239 let tab_size = NonZeroU32::new(rng.random_range(1..=4)).unwrap();
1240
1241 let font = test_font();
1242 let _font_id = text_system.resolve_font(&font);
1243 let font_size = px(14.0);
1244
1245 log::info!("Tab size: {}", tab_size);
1246 log::info!("Wrap width: {:?}", wrap_width);
1247
1248 let buffer = cx.update(|cx| {
1249 if rng.random() {
1250 MultiBuffer::build_random(&mut rng, cx)
1251 } else {
1252 let len = rng.random_range(0..10);
1253 let text = util::RandomCharIter::new(&mut rng)
1254 .take(len)
1255 .collect::<String>();
1256 MultiBuffer::build_simple(&text, cx)
1257 }
1258 });
1259 let mut buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
1260 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1261 let (mut inlay_map, inlay_snapshot) = InlayMap::new(buffer_snapshot.clone());
1262 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1263 let (mut fold_map, fold_snapshot) = FoldMap::new(inlay_snapshot.clone());
1264 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1265 let (mut tab_map, _) = TabMap::new(fold_snapshot.clone(), tab_size);
1266 let tabs_snapshot = tab_map.set_max_expansion_column(32);
1267 log::info!("TabMap text: {:?}", tabs_snapshot.text());
1268
1269 let mut line_wrapper = text_system.line_wrapper(font.clone(), font_size);
1270 let expected_text = wrap_text(&tabs_snapshot, wrap_width, &mut line_wrapper);
1271
1272 let (wrap_map, _) =
1273 cx.update(|cx| WrapMap::new(tabs_snapshot.clone(), font, font_size, wrap_width, cx));
1274 let mut notifications = observe(&wrap_map, cx);
1275
1276 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1277 notifications.next().await.unwrap();
1278 }
1279
1280 let (initial_snapshot, _) = wrap_map.update(cx, |map, cx| {
1281 assert!(!map.is_rewrapping());
1282 map.sync(tabs_snapshot.clone(), Vec::new(), cx)
1283 });
1284
1285 let actual_text = initial_snapshot.text();
1286 assert_eq!(
1287 actual_text,
1288 expected_text,
1289 "unwrapped text is: {:?}",
1290 tabs_snapshot.text()
1291 );
1292 log::info!("Wrapped text: {:?}", actual_text);
1293
1294 let mut next_inlay_id = 0;
1295 let mut edits = Vec::new();
1296 for _i in 0..operations {
1297 log::info!("{} ==============================================", _i);
1298
1299 let mut buffer_edits = Vec::new();
1300 match rng.random_range(0..=100) {
1301 0..=19 => {
1302 wrap_width = if rng.random_bool(0.2) {
1303 None
1304 } else {
1305 Some(px(rng.random_range(0.0..=1000.0)))
1306 };
1307 log::info!("Setting wrap width to {:?}", wrap_width);
1308 wrap_map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
1309 }
1310 20..=39 => {
1311 for (fold_snapshot, fold_edits) in fold_map.randomly_mutate(&mut rng) {
1312 let (tabs_snapshot, tab_edits) =
1313 tab_map.sync(fold_snapshot, fold_edits, tab_size);
1314 let (mut snapshot, wrap_edits) =
1315 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1316 snapshot.check_invariants();
1317 snapshot.verify_chunks(&mut rng);
1318 edits.push((snapshot, wrap_edits));
1319 }
1320 }
1321 40..=59 => {
1322 let (inlay_snapshot, inlay_edits) =
1323 inlay_map.randomly_mutate(&mut next_inlay_id, &mut rng);
1324 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1325 let (tabs_snapshot, tab_edits) =
1326 tab_map.sync(fold_snapshot, fold_edits, tab_size);
1327 let (mut snapshot, wrap_edits) =
1328 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot, tab_edits, cx));
1329 snapshot.check_invariants();
1330 snapshot.verify_chunks(&mut rng);
1331 edits.push((snapshot, wrap_edits));
1332 }
1333 _ => {
1334 buffer.update(cx, |buffer, cx| {
1335 let subscription = buffer.subscribe();
1336 let edit_count = rng.random_range(1..=5);
1337 buffer.randomly_mutate(&mut rng, edit_count, cx);
1338 buffer_snapshot = buffer.snapshot(cx);
1339 buffer_edits.extend(subscription.consume());
1340 });
1341 }
1342 }
1343
1344 log::info!("Buffer text: {:?}", buffer_snapshot.text());
1345 let (inlay_snapshot, inlay_edits) =
1346 inlay_map.sync(buffer_snapshot.clone(), buffer_edits);
1347 log::info!("InlayMap text: {:?}", inlay_snapshot.text());
1348 let (fold_snapshot, fold_edits) = fold_map.read(inlay_snapshot, inlay_edits);
1349 log::info!("FoldMap text: {:?}", fold_snapshot.text());
1350 let (tabs_snapshot, tab_edits) = tab_map.sync(fold_snapshot, fold_edits, tab_size);
1351 log::info!("TabMap text: {:?}", tabs_snapshot.text());
1352
1353 let expected_text = wrap_text(&tabs_snapshot, wrap_width, &mut line_wrapper);
1354 let (mut snapshot, wrap_edits) =
1355 wrap_map.update(cx, |map, cx| map.sync(tabs_snapshot.clone(), tab_edits, cx));
1356 snapshot.check_invariants();
1357 snapshot.verify_chunks(&mut rng);
1358 edits.push((snapshot, wrap_edits));
1359
1360 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) && rng.random_bool(0.4) {
1361 log::info!("Waiting for wrapping to finish");
1362 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1363 notifications.next().await.unwrap();
1364 }
1365 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1366 }
1367
1368 if !wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1369 let (mut wrapped_snapshot, wrap_edits) = wrap_map.update(cx, |map, cx| {
1370 map.sync(tabs_snapshot.clone(), Vec::new(), cx)
1371 });
1372 let actual_text = wrapped_snapshot.text();
1373 let actual_longest_row = wrapped_snapshot.longest_row();
1374 log::info!("Wrapping finished: {:?}", actual_text);
1375 wrapped_snapshot.check_invariants();
1376 wrapped_snapshot.verify_chunks(&mut rng);
1377 edits.push((wrapped_snapshot.clone(), wrap_edits));
1378 assert_eq!(
1379 actual_text,
1380 expected_text,
1381 "unwrapped text is: {:?}",
1382 tabs_snapshot.text()
1383 );
1384
1385 let mut summary = TextSummary::default();
1386 for (ix, item) in wrapped_snapshot
1387 .transforms
1388 .items(())
1389 .into_iter()
1390 .enumerate()
1391 {
1392 summary += &item.summary.output;
1393 log::info!("{} summary: {:?}", ix, item.summary.output,);
1394 }
1395
1396 if tab_size.get() == 1
1397 || !wrapped_snapshot
1398 .tab_snapshot
1399 .fold_snapshot
1400 .text()
1401 .contains('\t')
1402 {
1403 let mut expected_longest_rows = Vec::new();
1404 let mut longest_line_len = -1;
1405 for (row, line) in expected_text.split('\n').enumerate() {
1406 let line_char_count = line.chars().count() as isize;
1407 if line_char_count > longest_line_len {
1408 expected_longest_rows.clear();
1409 longest_line_len = line_char_count;
1410 }
1411 if line_char_count >= longest_line_len {
1412 expected_longest_rows.push(row as u32);
1413 }
1414 }
1415
1416 assert!(
1417 expected_longest_rows.contains(&actual_longest_row),
1418 "incorrect longest row {}. expected {:?} with length {}",
1419 actual_longest_row,
1420 expected_longest_rows,
1421 longest_line_len,
1422 )
1423 }
1424 }
1425 }
1426
1427 let mut initial_text = Rope::from(initial_snapshot.text().as_str());
1428 for (snapshot, patch) in edits {
1429 let snapshot_text = Rope::from(snapshot.text().as_str());
1430 for edit in &patch {
1431 let old_start = initial_text.point_to_offset(Point::new(edit.new.start.0, 0));
1432 let old_end = initial_text.point_to_offset(cmp::min(
1433 Point::new(edit.new.start.0 + (edit.old.end - edit.old.start).0, 0),
1434 initial_text.max_point(),
1435 ));
1436 let new_start = snapshot_text.point_to_offset(Point::new(edit.new.start.0, 0));
1437 let new_end = snapshot_text.point_to_offset(cmp::min(
1438 Point::new(edit.new.end.0, 0),
1439 snapshot_text.max_point(),
1440 ));
1441 let new_text = snapshot_text
1442 .chunks_in_range(new_start..new_end)
1443 .collect::<String>();
1444
1445 initial_text.replace(old_start..old_end, &new_text);
1446 }
1447 assert_eq!(initial_text.to_string(), snapshot_text.to_string());
1448 }
1449
1450 if wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1451 log::info!("Waiting for wrapping to finish");
1452 while wrap_map.read_with(cx, |map, _| map.is_rewrapping()) {
1453 notifications.next().await.unwrap();
1454 }
1455 }
1456 wrap_map.read_with(cx, |map, _| assert!(map.pending_edits.is_empty()));
1457 }
1458
1459 fn init_test(cx: &mut gpui::TestAppContext) {
1460 cx.update(|cx| {
1461 let settings = SettingsStore::test(cx);
1462 cx.set_global(settings);
1463 theme::init(LoadThemes::JustBase, cx);
1464 });
1465 }
1466
1467 fn wrap_text(
1468 tab_snapshot: &TabSnapshot,
1469 wrap_width: Option<Pixels>,
1470 line_wrapper: &mut LineWrapper,
1471 ) -> String {
1472 if let Some(wrap_width) = wrap_width {
1473 let mut wrapped_text = String::new();
1474 for (row, line) in tab_snapshot.text().split('\n').enumerate() {
1475 if row > 0 {
1476 wrapped_text.push('\n');
1477 }
1478
1479 let mut prev_ix = 0;
1480 for boundary in line_wrapper.wrap_line(&[LineFragment::text(line)], wrap_width) {
1481 wrapped_text.push_str(&line[prev_ix..boundary.ix]);
1482 wrapped_text.push('\n');
1483 wrapped_text.push_str(&" ".repeat(boundary.next_indent as usize));
1484 prev_ix = boundary.ix;
1485 }
1486 wrapped_text.push_str(&line[prev_ix..]);
1487 }
1488
1489 wrapped_text
1490 } else {
1491 tab_snapshot.text()
1492 }
1493 }
1494
1495 impl WrapSnapshot {
1496 fn verify_chunks(&mut self, rng: &mut impl Rng) {
1497 for _ in 0..5 {
1498 let mut end_row = rng.random_range(0..=self.max_point().row().0);
1499 let start_row = rng.random_range(0..=end_row);
1500 end_row += 1;
1501
1502 let mut expected_text = self.text_chunks(WrapRow(start_row)).collect::<String>();
1503 if expected_text.ends_with('\n') {
1504 expected_text.push('\n');
1505 }
1506 let mut expected_text = expected_text
1507 .lines()
1508 .take((end_row - start_row) as usize)
1509 .collect::<Vec<_>>()
1510 .join("\n");
1511 if end_row <= self.max_point().row().0 {
1512 expected_text.push('\n');
1513 }
1514
1515 let actual_text = self
1516 .chunks(
1517 WrapRow(start_row)..WrapRow(end_row),
1518 true,
1519 Highlights::default(),
1520 )
1521 .map(|c| c.text)
1522 .collect::<String>();
1523 assert_eq!(
1524 expected_text,
1525 actual_text,
1526 "chunks != highlighted_chunks for rows {:?}",
1527 start_row..end_row
1528 );
1529 }
1530 }
1531 }
1532}