1mod block_map;
2mod fold_map;
3mod tab_map;
4mod wrap_map;
5
6use crate::{Anchor, MultiBuffer, MultiBufferSnapshot, ToOffset, ToPoint};
7use block_map::{BlockMap, BlockPoint};
8use collections::{HashMap, HashSet};
9use fold_map::{FoldMap, ToFoldPoint as _};
10use gpui::{fonts::FontId, Entity, ModelContext, ModelHandle};
11use language::{Point, Subscription as BufferSubscription};
12use std::ops::Range;
13use sum_tree::Bias;
14use tab_map::TabMap;
15use theme::SyntaxTheme;
16use wrap_map::WrapMap;
17
18pub use block_map::{
19 AlignedBlock, BlockBufferRows as DisplayBufferRows, BlockChunks as DisplayChunks, BlockContext,
20 BlockDisposition, BlockId, BlockProperties, RenderBlock,
21};
22
23pub trait ToDisplayPoint {
24 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint;
25}
26
27pub struct DisplayMap {
28 buffer: ModelHandle<MultiBuffer>,
29 buffer_subscription: BufferSubscription,
30 fold_map: FoldMap,
31 tab_map: TabMap,
32 wrap_map: ModelHandle<WrapMap>,
33 block_map: BlockMap,
34}
35
36impl Entity for DisplayMap {
37 type Event = ();
38}
39
40impl DisplayMap {
41 pub fn new(
42 buffer: ModelHandle<MultiBuffer>,
43 tab_size: usize,
44 font_id: FontId,
45 font_size: f32,
46 wrap_width: Option<f32>,
47 cx: &mut ModelContext<Self>,
48 ) -> Self {
49 let buffer_subscription = buffer.update(cx, |buffer, _| buffer.subscribe());
50 let (fold_map, snapshot) = FoldMap::new(buffer.read(cx).snapshot(cx));
51 let (tab_map, snapshot) = TabMap::new(snapshot, tab_size);
52 let (wrap_map, snapshot) = WrapMap::new(snapshot, font_id, font_size, wrap_width, cx);
53 let block_map = BlockMap::new(snapshot);
54 cx.observe(&wrap_map, |_, _, cx| cx.notify()).detach();
55 DisplayMap {
56 buffer,
57 buffer_subscription,
58 fold_map,
59 tab_map,
60 wrap_map,
61 block_map,
62 }
63 }
64
65 pub fn snapshot(&self, cx: &mut ModelContext<Self>) -> DisplaySnapshot {
66 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
67 let edits = self.buffer_subscription.consume().into_inner();
68 let (folds_snapshot, edits) = self.fold_map.read(buffer_snapshot, edits);
69 let (tabs_snapshot, edits) = self.tab_map.sync(folds_snapshot.clone(), edits);
70 let (wraps_snapshot, edits) = self
71 .wrap_map
72 .update(cx, |map, cx| map.sync(tabs_snapshot.clone(), edits, cx));
73 let blocks_snapshot = self.block_map.read(wraps_snapshot.clone(), edits);
74
75 DisplaySnapshot {
76 buffer_snapshot: self.buffer.read(cx).snapshot(cx),
77 folds_snapshot,
78 tabs_snapshot,
79 wraps_snapshot,
80 blocks_snapshot,
81 }
82 }
83
84 pub fn fold<T: ToOffset>(
85 &mut self,
86 ranges: impl IntoIterator<Item = Range<T>>,
87 cx: &mut ModelContext<Self>,
88 ) {
89 let snapshot = self.buffer.read(cx).snapshot(cx);
90 let edits = self.buffer_subscription.consume().into_inner();
91 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
92 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
93 let (snapshot, edits) = self
94 .wrap_map
95 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
96 self.block_map.read(snapshot, edits);
97 let (snapshot, edits) = fold_map.fold(ranges);
98 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
99 let (snapshot, edits) = self
100 .wrap_map
101 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
102 self.block_map.read(snapshot, edits);
103 }
104
105 pub fn unfold<T: ToOffset>(
106 &mut self,
107 ranges: impl IntoIterator<Item = Range<T>>,
108 cx: &mut ModelContext<Self>,
109 ) {
110 let snapshot = self.buffer.read(cx).snapshot(cx);
111 let edits = self.buffer_subscription.consume().into_inner();
112 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
113 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
114 let (snapshot, edits) = self
115 .wrap_map
116 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
117 self.block_map.read(snapshot, edits);
118 let (snapshot, edits) = fold_map.unfold(ranges);
119 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
120 let (snapshot, edits) = self
121 .wrap_map
122 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
123 self.block_map.read(snapshot, edits);
124 }
125
126 pub fn insert_blocks(
127 &mut self,
128 blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
129 cx: &mut ModelContext<Self>,
130 ) -> Vec<BlockId> {
131 let snapshot = self.buffer.read(cx).snapshot(cx);
132 let edits = self.buffer_subscription.consume().into_inner();
133 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
134 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
135 let (snapshot, edits) = self
136 .wrap_map
137 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
138 let mut block_map = self.block_map.write(snapshot, edits);
139 block_map.insert(blocks)
140 }
141
142 pub fn replace_blocks(&mut self, styles: HashMap<BlockId, RenderBlock>) {
143 self.block_map.replace(styles);
144 }
145
146 pub fn remove_blocks(&mut self, ids: HashSet<BlockId>, cx: &mut ModelContext<Self>) {
147 let snapshot = self.buffer.read(cx).snapshot(cx);
148 let edits = self.buffer_subscription.consume().into_inner();
149 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
150 let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
151 let (snapshot, edits) = self
152 .wrap_map
153 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
154 let mut block_map = self.block_map.write(snapshot, edits);
155 block_map.remove(ids);
156 }
157
158 pub fn set_font(&self, font_id: FontId, font_size: f32, cx: &mut ModelContext<Self>) {
159 self.wrap_map
160 .update(cx, |map, cx| map.set_font(font_id, font_size, cx));
161 }
162
163 pub fn set_wrap_width(&self, width: Option<f32>, cx: &mut ModelContext<Self>) -> bool {
164 self.wrap_map
165 .update(cx, |map, cx| map.set_wrap_width(width, cx))
166 }
167
168 #[cfg(test)]
169 pub fn is_rewrapping(&self, cx: &gpui::AppContext) -> bool {
170 self.wrap_map.read(cx).is_rewrapping()
171 }
172}
173
174pub struct DisplaySnapshot {
175 pub buffer_snapshot: MultiBufferSnapshot,
176 folds_snapshot: fold_map::FoldSnapshot,
177 tabs_snapshot: tab_map::TabSnapshot,
178 wraps_snapshot: wrap_map::WrapSnapshot,
179 blocks_snapshot: block_map::BlockSnapshot,
180}
181
182impl DisplaySnapshot {
183 #[cfg(test)]
184 pub fn fold_count(&self) -> usize {
185 self.folds_snapshot.fold_count()
186 }
187
188 pub fn is_empty(&self) -> bool {
189 self.buffer_snapshot.len() == 0
190 }
191
192 pub fn buffer_rows<'a>(&'a self, start_row: u32) -> DisplayBufferRows<'a> {
193 self.blocks_snapshot.buffer_rows(start_row)
194 }
195
196 pub fn max_buffer_row(&self) -> u32 {
197 self.buffer_snapshot.max_buffer_row()
198 }
199
200 pub fn prev_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
201 loop {
202 let mut fold_point = point.to_fold_point(&self.folds_snapshot, Bias::Left);
203 *fold_point.column_mut() = 0;
204 point = fold_point.to_buffer_point(&self.folds_snapshot);
205
206 let mut display_point = self.point_to_display_point(point, Bias::Left);
207 *display_point.column_mut() = 0;
208 let next_point = self.display_point_to_point(display_point, Bias::Left);
209 if next_point == point {
210 return (point, display_point);
211 }
212 point = next_point;
213 }
214 }
215
216 pub fn next_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
217 loop {
218 let mut fold_point = point.to_fold_point(&self.folds_snapshot, Bias::Right);
219 *fold_point.column_mut() = self.folds_snapshot.line_len(fold_point.row());
220 point = fold_point.to_buffer_point(&self.folds_snapshot);
221
222 let mut display_point = self.point_to_display_point(point, Bias::Right);
223 *display_point.column_mut() = self.line_len(display_point.row());
224 let next_point = self.display_point_to_point(display_point, Bias::Right);
225 if next_point == point {
226 return (point, display_point);
227 }
228 point = next_point;
229 }
230 }
231
232 fn point_to_display_point(&self, point: Point, bias: Bias) -> DisplayPoint {
233 let fold_point = point.to_fold_point(&self.folds_snapshot, bias);
234 let tab_point = self.tabs_snapshot.to_tab_point(fold_point);
235 let wrap_point = self.wraps_snapshot.from_tab_point(tab_point);
236 let block_point = self.blocks_snapshot.to_block_point(wrap_point);
237 DisplayPoint(block_point)
238 }
239
240 fn display_point_to_point(&self, point: DisplayPoint, bias: Bias) -> Point {
241 let block_point = point.0;
242 let wrap_point = self.blocks_snapshot.to_wrap_point(block_point);
243 let tab_point = self.wraps_snapshot.to_tab_point(wrap_point);
244 let fold_point = self.tabs_snapshot.to_fold_point(tab_point, bias).0;
245 fold_point.to_buffer_point(&self.folds_snapshot)
246 }
247
248 pub fn max_point(&self) -> DisplayPoint {
249 DisplayPoint(self.blocks_snapshot.max_point())
250 }
251
252 pub fn text_chunks(&self, display_row: u32) -> impl Iterator<Item = &str> {
253 self.blocks_snapshot
254 .chunks(display_row..self.max_point().row() + 1, None)
255 .map(|h| h.text)
256 }
257
258 pub fn chunks<'a>(
259 &'a self,
260 display_rows: Range<u32>,
261 theme: Option<&'a SyntaxTheme>,
262 ) -> DisplayChunks<'a> {
263 self.blocks_snapshot.chunks(display_rows, theme)
264 }
265
266 pub fn chars_at<'a>(&'a self, point: DisplayPoint) -> impl Iterator<Item = char> + 'a {
267 let mut column = 0;
268 let mut chars = self.text_chunks(point.row()).flat_map(str::chars);
269 while column < point.column() {
270 if let Some(c) = chars.next() {
271 column += c.len_utf8() as u32;
272 } else {
273 break;
274 }
275 }
276 chars
277 }
278
279 pub fn column_to_chars(&self, display_row: u32, target: u32) -> u32 {
280 let mut count = 0;
281 let mut column = 0;
282 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
283 if column >= target {
284 break;
285 }
286 count += 1;
287 column += c.len_utf8() as u32;
288 }
289 count
290 }
291
292 pub fn column_from_chars(&self, display_row: u32, char_count: u32) -> u32 {
293 let mut count = 0;
294 let mut column = 0;
295 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
296 if c == '\n' || count >= char_count {
297 break;
298 }
299 count += 1;
300 column += c.len_utf8() as u32;
301 }
302 column
303 }
304
305 pub fn clip_point(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
306 DisplayPoint(self.blocks_snapshot.clip_point(point.0, bias))
307 }
308
309 pub fn folds_in_range<'a, T>(
310 &'a self,
311 range: Range<T>,
312 ) -> impl Iterator<Item = &'a Range<Anchor>>
313 where
314 T: ToOffset,
315 {
316 self.folds_snapshot.folds_in_range(range)
317 }
318
319 pub fn blocks_in_range<'a>(
320 &'a self,
321 rows: Range<u32>,
322 ) -> impl Iterator<Item = (u32, &'a AlignedBlock)> {
323 self.blocks_snapshot.blocks_in_range(rows)
324 }
325
326 pub fn intersects_fold<T: ToOffset>(&self, offset: T) -> bool {
327 self.folds_snapshot.intersects_fold(offset)
328 }
329
330 pub fn is_line_folded(&self, display_row: u32) -> bool {
331 let block_point = BlockPoint(Point::new(display_row, 0));
332 let wrap_point = self.blocks_snapshot.to_wrap_point(block_point);
333 let tab_point = self.wraps_snapshot.to_tab_point(wrap_point);
334 self.folds_snapshot.is_line_folded(tab_point.row())
335 }
336
337 pub fn is_block_line(&self, display_row: u32) -> bool {
338 self.blocks_snapshot.is_block_line(display_row)
339 }
340
341 pub fn soft_wrap_indent(&self, display_row: u32) -> Option<u32> {
342 let wrap_row = self
343 .blocks_snapshot
344 .to_wrap_point(BlockPoint::new(display_row, 0))
345 .row();
346 self.wraps_snapshot.soft_wrap_indent(wrap_row)
347 }
348
349 pub fn text(&self) -> String {
350 self.text_chunks(0).collect()
351 }
352
353 pub fn line(&self, display_row: u32) -> String {
354 let mut result = String::new();
355 for chunk in self.text_chunks(display_row) {
356 if let Some(ix) = chunk.find('\n') {
357 result.push_str(&chunk[0..ix]);
358 break;
359 } else {
360 result.push_str(chunk);
361 }
362 }
363 result
364 }
365
366 pub fn line_indent(&self, display_row: u32) -> (u32, bool) {
367 let mut indent = 0;
368 let mut is_blank = true;
369 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
370 if c == ' ' {
371 indent += 1;
372 } else {
373 is_blank = c == '\n';
374 break;
375 }
376 }
377 (indent, is_blank)
378 }
379
380 pub fn line_len(&self, row: u32) -> u32 {
381 self.blocks_snapshot.line_len(row)
382 }
383
384 pub fn longest_row(&self) -> u32 {
385 self.blocks_snapshot.longest_row()
386 }
387}
388
389#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
390pub struct DisplayPoint(BlockPoint);
391
392impl DisplayPoint {
393 pub fn new(row: u32, column: u32) -> Self {
394 Self(BlockPoint(Point::new(row, column)))
395 }
396
397 pub fn zero() -> Self {
398 Self::new(0, 0)
399 }
400
401 #[cfg(test)]
402 pub fn is_zero(&self) -> bool {
403 self.0.is_zero()
404 }
405
406 pub fn row(self) -> u32 {
407 self.0.row
408 }
409
410 pub fn column(self) -> u32 {
411 self.0.column
412 }
413
414 pub fn row_mut(&mut self) -> &mut u32 {
415 &mut self.0.row
416 }
417
418 pub fn column_mut(&mut self) -> &mut u32 {
419 &mut self.0.column
420 }
421
422 pub fn to_point(self, map: &DisplaySnapshot) -> Point {
423 map.display_point_to_point(self, Bias::Left)
424 }
425
426 pub fn to_offset(self, map: &DisplaySnapshot, bias: Bias) -> usize {
427 let unblocked_point = map.blocks_snapshot.to_wrap_point(self.0);
428 let unwrapped_point = map.wraps_snapshot.to_tab_point(unblocked_point);
429 let unexpanded_point = map.tabs_snapshot.to_fold_point(unwrapped_point, bias).0;
430 unexpanded_point.to_buffer_offset(&map.folds_snapshot)
431 }
432}
433
434impl ToDisplayPoint for usize {
435 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
436 map.point_to_display_point(self.to_point(&map.buffer_snapshot), Bias::Left)
437 }
438}
439
440impl ToDisplayPoint for Point {
441 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
442 map.point_to_display_point(*self, Bias::Left)
443 }
444}
445
446impl ToDisplayPoint for Anchor {
447 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
448 self.to_point(&map.buffer_snapshot).to_display_point(map)
449 }
450}
451
452#[cfg(test)]
453mod tests {
454 use super::*;
455 use crate::movement;
456 use gpui::{color::Color, elements::*, test::observe, MutableAppContext};
457 use language::{Buffer, Language, LanguageConfig, RandomCharIter, SelectionGoal};
458 use rand::{prelude::*, Rng};
459 use smol::stream::StreamExt;
460 use std::{env, sync::Arc};
461 use theme::SyntaxTheme;
462 use util::test::sample_text;
463 use Bias::*;
464
465 #[gpui::test(iterations = 100)]
466 async fn test_random_display_map(mut cx: gpui::TestAppContext, mut rng: StdRng) {
467 cx.foreground().set_block_on_ticks(0..=50);
468 cx.foreground().forbid_parking();
469 let operations = env::var("OPERATIONS")
470 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
471 .unwrap_or(10);
472
473 let font_cache = cx.font_cache().clone();
474 let tab_size = rng.gen_range(1..=4);
475 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
476 let font_id = font_cache
477 .select_font(family_id, &Default::default())
478 .unwrap();
479 let font_size = 14.0;
480 let max_wrap_width = 300.0;
481 let mut wrap_width = if rng.gen_bool(0.1) {
482 None
483 } else {
484 Some(rng.gen_range(0.0..=max_wrap_width))
485 };
486
487 log::info!("tab size: {}", tab_size);
488 log::info!("wrap width: {:?}", wrap_width);
489
490 let buffer = cx.update(|cx| {
491 if rng.gen() {
492 let len = rng.gen_range(0..10);
493 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
494 MultiBuffer::build_simple(&text, cx)
495 } else {
496 MultiBuffer::build_random(&mut rng, cx)
497 }
498 });
499
500 let map = cx.add_model(|cx| {
501 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, wrap_width, cx)
502 });
503 let mut notifications = observe(&map, &mut cx);
504 let mut fold_count = 0;
505 let mut blocks = Vec::new();
506
507 let snapshot = map.update(&mut cx, |map, cx| map.snapshot(cx));
508 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
509 log::info!("fold text: {:?}", snapshot.folds_snapshot.text());
510 log::info!("tab text: {:?}", snapshot.tabs_snapshot.text());
511 log::info!("wrap text: {:?}", snapshot.wraps_snapshot.text());
512 log::info!("block text: {:?}", snapshot.blocks_snapshot.text());
513 log::info!("display text: {:?}", snapshot.text());
514
515 for _i in 0..operations {
516 match rng.gen_range(0..100) {
517 0..=19 => {
518 wrap_width = if rng.gen_bool(0.2) {
519 None
520 } else {
521 Some(rng.gen_range(0.0..=max_wrap_width))
522 };
523 log::info!("setting wrap width to {:?}", wrap_width);
524 map.update(&mut cx, |map, cx| map.set_wrap_width(wrap_width, cx));
525 }
526 20..=44 => {
527 map.update(&mut cx, |map, cx| {
528 if rng.gen() || blocks.is_empty() {
529 let buffer = map.snapshot(cx).buffer_snapshot;
530 let block_properties = (0..rng.gen_range(1..=1))
531 .map(|_| {
532 let position =
533 buffer.anchor_after(buffer.clip_offset(
534 rng.gen_range(0..=buffer.len()),
535 Bias::Left,
536 ));
537
538 let disposition = if rng.gen() {
539 BlockDisposition::Above
540 } else {
541 BlockDisposition::Below
542 };
543 let height = rng.gen_range(1..5);
544 log::info!(
545 "inserting block {:?} {:?} with height {}",
546 disposition,
547 position.to_point(&buffer),
548 height
549 );
550 BlockProperties {
551 position,
552 height,
553 disposition,
554 render: Arc::new(|_| Empty::new().boxed()),
555 }
556 })
557 .collect::<Vec<_>>();
558 blocks.extend(map.insert_blocks(block_properties, cx));
559 } else {
560 blocks.shuffle(&mut rng);
561 let remove_count = rng.gen_range(1..=4.min(blocks.len()));
562 let block_ids_to_remove = (0..remove_count)
563 .map(|_| blocks.remove(rng.gen_range(0..blocks.len())))
564 .collect();
565 log::info!("removing block ids {:?}", block_ids_to_remove);
566 map.remove_blocks(block_ids_to_remove, cx);
567 }
568 });
569 }
570 45..=79 => {
571 let mut ranges = Vec::new();
572 for _ in 0..rng.gen_range(1..=3) {
573 buffer.read_with(&cx, |buffer, cx| {
574 let buffer = buffer.read(cx);
575 let end = buffer.clip_offset(rng.gen_range(0..=buffer.len()), Right);
576 let start = buffer.clip_offset(rng.gen_range(0..=end), Left);
577 ranges.push(start..end);
578 });
579 }
580
581 if rng.gen() && fold_count > 0 {
582 log::info!("unfolding ranges: {:?}", ranges);
583 map.update(&mut cx, |map, cx| {
584 map.unfold(ranges, cx);
585 });
586 } else {
587 log::info!("folding ranges: {:?}", ranges);
588 map.update(&mut cx, |map, cx| {
589 map.fold(ranges, cx);
590 });
591 }
592 }
593 _ => {
594 buffer.update(&mut cx, |buffer, cx| buffer.randomly_edit(&mut rng, 5, cx));
595 }
596 }
597
598 if map.read_with(&cx, |map, cx| map.is_rewrapping(cx)) {
599 notifications.next().await.unwrap();
600 }
601
602 let snapshot = map.update(&mut cx, |map, cx| map.snapshot(cx));
603 fold_count = snapshot.fold_count();
604 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
605 log::info!("fold text: {:?}", snapshot.folds_snapshot.text());
606 log::info!("tab text: {:?}", snapshot.tabs_snapshot.text());
607 log::info!("wrap text: {:?}", snapshot.wraps_snapshot.text());
608 log::info!("block text: {:?}", snapshot.blocks_snapshot.text());
609 log::info!("display text: {:?}", snapshot.text());
610
611 // Line boundaries
612 let buffer = &snapshot.buffer_snapshot;
613 for _ in 0..5 {
614 let row = rng.gen_range(0..=buffer.max_point().row);
615 let column = rng.gen_range(0..=buffer.line_len(row));
616 let point = buffer.clip_point(Point::new(row, column), Left);
617
618 let (prev_buffer_bound, prev_display_bound) = snapshot.prev_line_boundary(point);
619 let (next_buffer_bound, next_display_bound) = snapshot.next_line_boundary(point);
620
621 assert!(prev_buffer_bound <= point);
622 assert!(next_buffer_bound >= point);
623 assert_eq!(prev_buffer_bound.column, 0);
624 assert_eq!(prev_display_bound.column(), 0);
625 if next_buffer_bound < buffer.max_point() {
626 assert_eq!(buffer.chars_at(next_buffer_bound).next(), Some('\n'));
627 }
628
629 assert_eq!(
630 prev_display_bound,
631 prev_buffer_bound.to_display_point(&snapshot),
632 "row boundary before {:?}. reported buffer row boundary: {:?}",
633 point,
634 prev_buffer_bound
635 );
636 assert_eq!(
637 next_display_bound,
638 next_buffer_bound.to_display_point(&snapshot),
639 "display row boundary after {:?}. reported buffer row boundary: {:?}",
640 point,
641 next_buffer_bound
642 );
643 assert_eq!(
644 prev_buffer_bound,
645 prev_display_bound.to_point(&snapshot),
646 "row boundary before {:?}. reported display row boundary: {:?}",
647 point,
648 prev_display_bound
649 );
650 assert_eq!(
651 next_buffer_bound,
652 next_display_bound.to_point(&snapshot),
653 "row boundary after {:?}. reported display row boundary: {:?}",
654 point,
655 next_display_bound
656 );
657 }
658
659 // Movement
660 let min_point = snapshot.clip_point(DisplayPoint::new(0, 0), Left);
661 let max_point = snapshot.clip_point(snapshot.max_point(), Right);
662 for _ in 0..5 {
663 let row = rng.gen_range(0..=snapshot.max_point().row());
664 let column = rng.gen_range(0..=snapshot.line_len(row));
665 let point = snapshot.clip_point(DisplayPoint::new(row, column), Left);
666
667 log::info!("Moving from point {:?}", point);
668
669 let moved_right = movement::right(&snapshot, point).unwrap();
670 log::info!("Right {:?}", moved_right);
671 if point < max_point {
672 assert!(moved_right > point);
673 if point.column() == snapshot.line_len(point.row())
674 || snapshot.soft_wrap_indent(point.row()).is_some()
675 && point.column() == snapshot.line_len(point.row()) - 1
676 {
677 assert!(moved_right.row() > point.row());
678 }
679 } else {
680 assert_eq!(moved_right, point);
681 }
682
683 let moved_left = movement::left(&snapshot, point).unwrap();
684 log::info!("Left {:?}", moved_left);
685 if point > min_point {
686 assert!(moved_left < point);
687 if point.column() == 0 {
688 assert!(moved_left.row() < point.row());
689 }
690 } else {
691 assert_eq!(moved_left, point);
692 }
693 }
694 }
695 }
696
697 #[gpui::test(retries = 5)]
698 fn test_soft_wraps(cx: &mut MutableAppContext) {
699 cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
700 cx.foreground().forbid_parking();
701
702 let font_cache = cx.font_cache();
703
704 let tab_size = 4;
705 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
706 let font_id = font_cache
707 .select_font(family_id, &Default::default())
708 .unwrap();
709 let font_size = 12.0;
710 let wrap_width = Some(64.);
711
712 let text = "one two three four five\nsix seven eight";
713 let buffer = MultiBuffer::build_simple(text, cx);
714 let map = cx.add_model(|cx| {
715 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, wrap_width, cx)
716 });
717
718 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
719 assert_eq!(
720 snapshot.text_chunks(0).collect::<String>(),
721 "one two \nthree four \nfive\nsix seven \neight"
722 );
723 assert_eq!(
724 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Left),
725 DisplayPoint::new(0, 7)
726 );
727 assert_eq!(
728 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Right),
729 DisplayPoint::new(1, 0)
730 );
731 assert_eq!(
732 movement::right(&snapshot, DisplayPoint::new(0, 7)).unwrap(),
733 DisplayPoint::new(1, 0)
734 );
735 assert_eq!(
736 movement::left(&snapshot, DisplayPoint::new(1, 0)).unwrap(),
737 DisplayPoint::new(0, 7)
738 );
739 assert_eq!(
740 movement::up(&snapshot, DisplayPoint::new(1, 10), SelectionGoal::None).unwrap(),
741 (DisplayPoint::new(0, 7), SelectionGoal::Column(10))
742 );
743 assert_eq!(
744 movement::down(
745 &snapshot,
746 DisplayPoint::new(0, 7),
747 SelectionGoal::Column(10)
748 )
749 .unwrap(),
750 (DisplayPoint::new(1, 10), SelectionGoal::Column(10))
751 );
752 assert_eq!(
753 movement::down(
754 &snapshot,
755 DisplayPoint::new(1, 10),
756 SelectionGoal::Column(10)
757 )
758 .unwrap(),
759 (DisplayPoint::new(2, 4), SelectionGoal::Column(10))
760 );
761
762 let ix = snapshot.buffer_snapshot.text().find("seven").unwrap();
763 buffer.update(cx, |buffer, cx| {
764 buffer.edit(vec![ix..ix], "and ", cx);
765 });
766
767 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
768 assert_eq!(
769 snapshot.text_chunks(1).collect::<String>(),
770 "three four \nfive\nsix and \nseven eight"
771 );
772
773 // Re-wrap on font size changes
774 map.update(cx, |map, cx| map.set_font(font_id, font_size + 3., cx));
775
776 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
777 assert_eq!(
778 snapshot.text_chunks(1).collect::<String>(),
779 "three \nfour five\nsix and \nseven \neight"
780 )
781 }
782
783 #[gpui::test]
784 fn test_text_chunks(cx: &mut gpui::MutableAppContext) {
785 let text = sample_text(6, 6, 'a');
786 let buffer = MultiBuffer::build_simple(&text, cx);
787 let tab_size = 4;
788 let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap();
789 let font_id = cx
790 .font_cache()
791 .select_font(family_id, &Default::default())
792 .unwrap();
793 let font_size = 14.0;
794 let map = cx.add_model(|cx| {
795 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, None, cx)
796 });
797 buffer.update(cx, |buffer, cx| {
798 buffer.edit(
799 vec![
800 Point::new(1, 0)..Point::new(1, 0),
801 Point::new(1, 1)..Point::new(1, 1),
802 Point::new(2, 1)..Point::new(2, 1),
803 ],
804 "\t",
805 cx,
806 )
807 });
808
809 assert_eq!(
810 map.update(cx, |map, cx| map.snapshot(cx))
811 .text_chunks(1)
812 .collect::<String>()
813 .lines()
814 .next(),
815 Some(" b bbbbb")
816 );
817 assert_eq!(
818 map.update(cx, |map, cx| map.snapshot(cx))
819 .text_chunks(2)
820 .collect::<String>()
821 .lines()
822 .next(),
823 Some("c ccccc")
824 );
825 }
826
827 #[gpui::test]
828 async fn test_chunks(mut cx: gpui::TestAppContext) {
829 use unindent::Unindent as _;
830
831 let text = r#"
832 fn outer() {}
833
834 mod module {
835 fn inner() {}
836 }"#
837 .unindent();
838
839 let theme = SyntaxTheme::new(vec![
840 ("mod.body".to_string(), Color::red().into()),
841 ("fn.name".to_string(), Color::blue().into()),
842 ]);
843 let language = Arc::new(
844 Language::new(
845 LanguageConfig {
846 name: "Test".to_string(),
847 path_suffixes: vec![".test".to_string()],
848 ..Default::default()
849 },
850 Some(tree_sitter_rust::language()),
851 )
852 .with_highlights_query(
853 r#"
854 (mod_item name: (identifier) body: _ @mod.body)
855 (function_item name: (identifier) @fn.name)
856 "#,
857 )
858 .unwrap(),
859 );
860 language.set_theme(&theme);
861
862 let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
863 buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
864 let buffer = cx.add_model(|cx| MultiBuffer::singleton(buffer, cx));
865
866 let tab_size = 2;
867 let font_cache = cx.font_cache();
868 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
869 let font_id = font_cache
870 .select_font(family_id, &Default::default())
871 .unwrap();
872 let font_size = 14.0;
873
874 let map =
875 cx.add_model(|cx| DisplayMap::new(buffer, tab_size, font_id, font_size, None, cx));
876 assert_eq!(
877 cx.update(|cx| chunks(0..5, &map, &theme, cx)),
878 vec![
879 ("fn ".to_string(), None),
880 ("outer".to_string(), Some(Color::blue())),
881 ("() {}\n\nmod module ".to_string(), None),
882 ("{\n fn ".to_string(), Some(Color::red())),
883 ("inner".to_string(), Some(Color::blue())),
884 ("() {}\n}".to_string(), Some(Color::red())),
885 ]
886 );
887 assert_eq!(
888 cx.update(|cx| chunks(3..5, &map, &theme, cx)),
889 vec![
890 (" fn ".to_string(), Some(Color::red())),
891 ("inner".to_string(), Some(Color::blue())),
892 ("() {}\n}".to_string(), Some(Color::red())),
893 ]
894 );
895
896 map.update(&mut cx, |map, cx| {
897 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
898 });
899 assert_eq!(
900 cx.update(|cx| chunks(0..2, &map, &theme, cx)),
901 vec![
902 ("fn ".to_string(), None),
903 ("out".to_string(), Some(Color::blue())),
904 ("…".to_string(), None),
905 (" fn ".to_string(), Some(Color::red())),
906 ("inner".to_string(), Some(Color::blue())),
907 ("() {}\n}".to_string(), Some(Color::red())),
908 ]
909 );
910 }
911
912 #[gpui::test]
913 async fn test_chunks_with_soft_wrapping(mut cx: gpui::TestAppContext) {
914 use unindent::Unindent as _;
915
916 cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
917
918 let text = r#"
919 fn outer() {}
920
921 mod module {
922 fn inner() {}
923 }"#
924 .unindent();
925
926 let theme = SyntaxTheme::new(vec![
927 ("mod.body".to_string(), Color::red().into()),
928 ("fn.name".to_string(), Color::blue().into()),
929 ]);
930 let language = Arc::new(
931 Language::new(
932 LanguageConfig {
933 name: "Test".to_string(),
934 path_suffixes: vec![".test".to_string()],
935 ..Default::default()
936 },
937 Some(tree_sitter_rust::language()),
938 )
939 .with_highlights_query(
940 r#"
941 (mod_item name: (identifier) body: _ @mod.body)
942 (function_item name: (identifier) @fn.name)
943 "#,
944 )
945 .unwrap(),
946 );
947 language.set_theme(&theme);
948
949 let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
950 buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
951 let buffer = cx.add_model(|cx| MultiBuffer::singleton(buffer, cx));
952
953 let font_cache = cx.font_cache();
954
955 let tab_size = 4;
956 let family_id = font_cache.load_family(&["Courier"]).unwrap();
957 let font_id = font_cache
958 .select_font(family_id, &Default::default())
959 .unwrap();
960 let font_size = 16.0;
961
962 let map = cx
963 .add_model(|cx| DisplayMap::new(buffer, tab_size, font_id, font_size, Some(40.0), cx));
964 assert_eq!(
965 cx.update(|cx| chunks(0..5, &map, &theme, cx)),
966 [
967 ("fn \n".to_string(), None),
968 ("oute\nr".to_string(), Some(Color::blue())),
969 ("() \n{}\n\n".to_string(), None),
970 ]
971 );
972 assert_eq!(
973 cx.update(|cx| chunks(3..5, &map, &theme, cx)),
974 [("{}\n\n".to_string(), None)]
975 );
976
977 map.update(&mut cx, |map, cx| {
978 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
979 });
980 assert_eq!(
981 cx.update(|cx| chunks(1..4, &map, &theme, cx)),
982 [
983 ("out".to_string(), Some(Color::blue())),
984 ("…\n".to_string(), None),
985 (" \nfn ".to_string(), Some(Color::red())),
986 ("i\n".to_string(), Some(Color::blue()))
987 ]
988 );
989 }
990
991 #[gpui::test]
992 fn test_clip_point(cx: &mut gpui::MutableAppContext) {
993 use Bias::{Left, Right};
994
995 let text = "\n'a', 'α',\t'✋',\t'❎', '🍐'\n";
996 let display_text = "\n'a', 'α', '✋', '❎', '🍐'\n";
997 let buffer = MultiBuffer::build_simple(text, cx);
998
999 let tab_size = 4;
1000 let font_cache = cx.font_cache();
1001 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
1002 let font_id = font_cache
1003 .select_font(family_id, &Default::default())
1004 .unwrap();
1005 let font_size = 14.0;
1006 let map = cx.add_model(|cx| {
1007 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, None, cx)
1008 });
1009 let map = map.update(cx, |map, cx| map.snapshot(cx));
1010
1011 assert_eq!(map.text(), display_text);
1012 for (input_column, bias, output_column) in vec![
1013 ("'a', '".len(), Left, "'a', '".len()),
1014 ("'a', '".len() + 1, Left, "'a', '".len()),
1015 ("'a', '".len() + 1, Right, "'a', 'α".len()),
1016 ("'a', 'α', ".len(), Left, "'a', 'α',".len()),
1017 ("'a', 'α', ".len(), Right, "'a', 'α', ".len()),
1018 ("'a', 'α', '".len() + 1, Left, "'a', 'α', '".len()),
1019 ("'a', 'α', '".len() + 1, Right, "'a', 'α', '✋".len()),
1020 ("'a', 'α', '✋',".len(), Right, "'a', 'α', '✋',".len()),
1021 ("'a', 'α', '✋', ".len(), Left, "'a', 'α', '✋',".len()),
1022 (
1023 "'a', 'α', '✋', ".len(),
1024 Right,
1025 "'a', 'α', '✋', ".len(),
1026 ),
1027 ] {
1028 assert_eq!(
1029 map.clip_point(DisplayPoint::new(1, input_column as u32), bias),
1030 DisplayPoint::new(1, output_column as u32),
1031 "clip_point(({}, {}))",
1032 1,
1033 input_column,
1034 );
1035 }
1036 }
1037
1038 #[gpui::test]
1039 fn test_tabs_with_multibyte_chars(cx: &mut gpui::MutableAppContext) {
1040 let text = "✅\t\tα\nβ\t\n🏀β\t\tγ";
1041 let buffer = MultiBuffer::build_simple(text, cx);
1042 let tab_size = 4;
1043 let font_cache = cx.font_cache();
1044 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
1045 let font_id = font_cache
1046 .select_font(family_id, &Default::default())
1047 .unwrap();
1048 let font_size = 14.0;
1049
1050 let map = cx.add_model(|cx| {
1051 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, None, cx)
1052 });
1053 let map = map.update(cx, |map, cx| map.snapshot(cx));
1054 assert_eq!(map.text(), "✅ α\nβ \n🏀β γ");
1055 assert_eq!(
1056 map.text_chunks(0).collect::<String>(),
1057 "✅ α\nβ \n🏀β γ"
1058 );
1059 assert_eq!(map.text_chunks(1).collect::<String>(), "β \n🏀β γ");
1060 assert_eq!(map.text_chunks(2).collect::<String>(), "🏀β γ");
1061
1062 let point = Point::new(0, "✅\t\t".len() as u32);
1063 let display_point = DisplayPoint::new(0, "✅ ".len() as u32);
1064 assert_eq!(point.to_display_point(&map), display_point);
1065 assert_eq!(display_point.to_point(&map), point);
1066
1067 let point = Point::new(1, "β\t".len() as u32);
1068 let display_point = DisplayPoint::new(1, "β ".len() as u32);
1069 assert_eq!(point.to_display_point(&map), display_point);
1070 assert_eq!(display_point.to_point(&map), point,);
1071
1072 let point = Point::new(2, "🏀β\t\t".len() as u32);
1073 let display_point = DisplayPoint::new(2, "🏀β ".len() as u32);
1074 assert_eq!(point.to_display_point(&map), display_point);
1075 assert_eq!(display_point.to_point(&map), point,);
1076
1077 // Display points inside of expanded tabs
1078 assert_eq!(
1079 DisplayPoint::new(0, "✅ ".len() as u32).to_point(&map),
1080 Point::new(0, "✅\t".len() as u32),
1081 );
1082 assert_eq!(
1083 DisplayPoint::new(0, "✅ ".len() as u32).to_point(&map),
1084 Point::new(0, "✅".len() as u32),
1085 );
1086
1087 // Clipping display points inside of multi-byte characters
1088 assert_eq!(
1089 map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Left),
1090 DisplayPoint::new(0, 0)
1091 );
1092 assert_eq!(
1093 map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Bias::Right),
1094 DisplayPoint::new(0, "✅".len() as u32)
1095 );
1096 }
1097
1098 #[gpui::test]
1099 fn test_max_point(cx: &mut gpui::MutableAppContext) {
1100 let buffer = MultiBuffer::build_simple("aaa\n\t\tbbb", cx);
1101 let tab_size = 4;
1102 let font_cache = cx.font_cache();
1103 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
1104 let font_id = font_cache
1105 .select_font(family_id, &Default::default())
1106 .unwrap();
1107 let font_size = 14.0;
1108 let map = cx.add_model(|cx| {
1109 DisplayMap::new(buffer.clone(), tab_size, font_id, font_size, None, cx)
1110 });
1111 assert_eq!(
1112 map.update(cx, |map, cx| map.snapshot(cx)).max_point(),
1113 DisplayPoint::new(1, 11)
1114 )
1115 }
1116
1117 fn chunks<'a>(
1118 rows: Range<u32>,
1119 map: &ModelHandle<DisplayMap>,
1120 theme: &'a SyntaxTheme,
1121 cx: &mut MutableAppContext,
1122 ) -> Vec<(String, Option<Color>)> {
1123 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1124 let mut chunks: Vec<(String, Option<Color>)> = Vec::new();
1125 for chunk in snapshot.chunks(rows, Some(theme)) {
1126 let color = chunk.highlight_style.map(|s| s.color);
1127 if let Some((last_chunk, last_color)) = chunks.last_mut() {
1128 if color == *last_color {
1129 last_chunk.push_str(chunk.text);
1130 } else {
1131 chunks.push((chunk.text.to_string(), color));
1132 }
1133 } else {
1134 chunks.push((chunk.text.to_string(), color));
1135 }
1136 }
1137 chunks
1138 }
1139}