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;
10use gpui::{
11 fonts::{FontId, HighlightStyle},
12 Entity, ModelContext, ModelHandle,
13};
14use language::{Point, Subscription as BufferSubscription};
15use settings::Settings;
16use std::{any::TypeId, fmt::Debug, ops::Range, sync::Arc};
17use sum_tree::{Bias, TreeMap};
18use tab_map::TabMap;
19use wrap_map::WrapMap;
20
21pub use block_map::{
22 BlockBufferRows as DisplayBufferRows, BlockChunks as DisplayChunks, BlockContext,
23 BlockDisposition, BlockId, BlockProperties, RenderBlock, TransformBlock,
24};
25
26pub trait ToDisplayPoint {
27 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint;
28}
29
30type TextHighlights = TreeMap<Option<TypeId>, Arc<(HighlightStyle, Vec<Range<Anchor>>)>>;
31
32pub struct DisplayMap {
33 buffer: ModelHandle<MultiBuffer>,
34 buffer_subscription: BufferSubscription,
35 fold_map: FoldMap,
36 tab_map: TabMap,
37 wrap_map: ModelHandle<WrapMap>,
38 block_map: BlockMap,
39 text_highlights: TextHighlights,
40 pub clip_at_line_ends: bool,
41}
42
43impl Entity for DisplayMap {
44 type Event = ();
45}
46
47impl DisplayMap {
48 pub fn new(
49 buffer: ModelHandle<MultiBuffer>,
50 font_id: FontId,
51 font_size: f32,
52 wrap_width: Option<f32>,
53 buffer_header_height: u8,
54 excerpt_header_height: u8,
55 cx: &mut ModelContext<Self>,
56 ) -> Self {
57 let buffer_subscription = buffer.update(cx, |buffer, _| buffer.subscribe());
58
59 let tab_size = Self::tab_size(&buffer, cx);
60 let (fold_map, snapshot) = FoldMap::new(buffer.read(cx).snapshot(cx));
61 let (tab_map, snapshot) = TabMap::new(snapshot, tab_size);
62 let (wrap_map, snapshot) = WrapMap::new(snapshot, font_id, font_size, wrap_width, cx);
63 let block_map = BlockMap::new(snapshot, buffer_header_height, excerpt_header_height);
64 cx.observe(&wrap_map, |_, _, cx| cx.notify()).detach();
65 DisplayMap {
66 buffer,
67 buffer_subscription,
68 fold_map,
69 tab_map,
70 wrap_map,
71 block_map,
72 text_highlights: Default::default(),
73 clip_at_line_ends: false,
74 }
75 }
76
77 pub fn snapshot(&self, cx: &mut ModelContext<Self>) -> DisplaySnapshot {
78 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
79 let edits = self.buffer_subscription.consume().into_inner();
80 let (folds_snapshot, edits) = self.fold_map.read(buffer_snapshot, edits);
81
82 let tab_size = Self::tab_size(&self.buffer, cx);
83 let (tabs_snapshot, edits) = self.tab_map.sync(folds_snapshot.clone(), edits, tab_size);
84 let (wraps_snapshot, edits) = self
85 .wrap_map
86 .update(cx, |map, cx| map.sync(tabs_snapshot.clone(), edits, cx));
87 let blocks_snapshot = self.block_map.read(wraps_snapshot.clone(), edits);
88
89 DisplaySnapshot {
90 buffer_snapshot: self.buffer.read(cx).snapshot(cx),
91 folds_snapshot,
92 tabs_snapshot,
93 wraps_snapshot,
94 blocks_snapshot,
95 text_highlights: self.text_highlights.clone(),
96 clip_at_line_ends: self.clip_at_line_ends,
97 }
98 }
99
100 pub fn fold<T: ToOffset>(
101 &mut self,
102 ranges: impl IntoIterator<Item = Range<T>>,
103 cx: &mut ModelContext<Self>,
104 ) {
105 let snapshot = self.buffer.read(cx).snapshot(cx);
106 let edits = self.buffer_subscription.consume().into_inner();
107 let tab_size = Self::tab_size(&self.buffer, cx);
108 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
109 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
110 let (snapshot, edits) = self
111 .wrap_map
112 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
113 self.block_map.read(snapshot, edits);
114 let (snapshot, edits) = fold_map.fold(ranges);
115 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
116 let (snapshot, edits) = self
117 .wrap_map
118 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
119 self.block_map.read(snapshot, edits);
120 }
121
122 pub fn unfold<T: ToOffset>(
123 &mut self,
124 ranges: impl IntoIterator<Item = Range<T>>,
125 inclusive: bool,
126 cx: &mut ModelContext<Self>,
127 ) {
128 let snapshot = self.buffer.read(cx).snapshot(cx);
129 let edits = self.buffer_subscription.consume().into_inner();
130 let tab_size = Self::tab_size(&self.buffer, cx);
131 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
132 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
133 let (snapshot, edits) = self
134 .wrap_map
135 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
136 self.block_map.read(snapshot, edits);
137 let (snapshot, edits) = fold_map.unfold(ranges, inclusive);
138 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
139 let (snapshot, edits) = self
140 .wrap_map
141 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
142 self.block_map.read(snapshot, edits);
143 }
144
145 pub fn insert_blocks(
146 &mut self,
147 blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
148 cx: &mut ModelContext<Self>,
149 ) -> Vec<BlockId> {
150 let snapshot = self.buffer.read(cx).snapshot(cx);
151 let edits = self.buffer_subscription.consume().into_inner();
152 let tab_size = Self::tab_size(&self.buffer, cx);
153 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
154 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
155 let (snapshot, edits) = self
156 .wrap_map
157 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
158 let mut block_map = self.block_map.write(snapshot, edits);
159 block_map.insert(blocks)
160 }
161
162 pub fn replace_blocks(&mut self, styles: HashMap<BlockId, RenderBlock>) {
163 self.block_map.replace(styles);
164 }
165
166 pub fn remove_blocks(&mut self, ids: HashSet<BlockId>, cx: &mut ModelContext<Self>) {
167 let snapshot = self.buffer.read(cx).snapshot(cx);
168 let edits = self.buffer_subscription.consume().into_inner();
169 let tab_size = Self::tab_size(&self.buffer, cx);
170 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
171 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
172 let (snapshot, edits) = self
173 .wrap_map
174 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
175 let mut block_map = self.block_map.write(snapshot, edits);
176 block_map.remove(ids);
177 }
178
179 pub fn highlight_text(
180 &mut self,
181 type_id: TypeId,
182 ranges: Vec<Range<Anchor>>,
183 style: HighlightStyle,
184 ) {
185 self.text_highlights
186 .insert(Some(type_id), Arc::new((style, ranges)));
187 }
188
189 pub fn clear_text_highlights(
190 &mut self,
191 type_id: TypeId,
192 ) -> Option<Arc<(HighlightStyle, Vec<Range<Anchor>>)>> {
193 self.text_highlights.remove(&Some(type_id))
194 }
195
196 pub fn set_font(&self, font_id: FontId, font_size: f32, cx: &mut ModelContext<Self>) {
197 self.wrap_map
198 .update(cx, |map, cx| map.set_font(font_id, font_size, cx));
199 }
200
201 pub fn set_wrap_width(&self, width: Option<f32>, cx: &mut ModelContext<Self>) -> bool {
202 self.wrap_map
203 .update(cx, |map, cx| map.set_wrap_width(width, cx))
204 }
205
206 fn tab_size(buffer: &ModelHandle<MultiBuffer>, cx: &mut ModelContext<Self>) -> u32 {
207 let language_name = buffer
208 .read(cx)
209 .as_singleton()
210 .and_then(|buffer| buffer.read(cx).language())
211 .map(|language| language.name());
212
213 cx.global::<Settings>().tab_size(language_name.as_deref())
214 }
215
216 #[cfg(test)]
217 pub fn is_rewrapping(&self, cx: &gpui::AppContext) -> bool {
218 self.wrap_map.read(cx).is_rewrapping()
219 }
220}
221
222pub struct DisplaySnapshot {
223 pub buffer_snapshot: MultiBufferSnapshot,
224 folds_snapshot: fold_map::FoldSnapshot,
225 tabs_snapshot: tab_map::TabSnapshot,
226 wraps_snapshot: wrap_map::WrapSnapshot,
227 blocks_snapshot: block_map::BlockSnapshot,
228 text_highlights: TextHighlights,
229 clip_at_line_ends: bool,
230}
231
232impl DisplaySnapshot {
233 #[cfg(test)]
234 pub fn fold_count(&self) -> usize {
235 self.folds_snapshot.fold_count()
236 }
237
238 pub fn is_empty(&self) -> bool {
239 self.buffer_snapshot.len() == 0
240 }
241
242 pub fn buffer_rows<'a>(&'a self, start_row: u32) -> DisplayBufferRows<'a> {
243 self.blocks_snapshot.buffer_rows(start_row)
244 }
245
246 pub fn max_buffer_row(&self) -> u32 {
247 self.buffer_snapshot.max_buffer_row()
248 }
249
250 pub fn prev_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
251 loop {
252 let mut fold_point = self.folds_snapshot.to_fold_point(point, Bias::Left);
253 *fold_point.column_mut() = 0;
254 point = fold_point.to_buffer_point(&self.folds_snapshot);
255
256 let mut display_point = self.point_to_display_point(point, Bias::Left);
257 *display_point.column_mut() = 0;
258 let next_point = self.display_point_to_point(display_point, Bias::Left);
259 if next_point == point {
260 return (point, display_point);
261 }
262 point = next_point;
263 }
264 }
265
266 pub fn next_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
267 loop {
268 let mut fold_point = self.folds_snapshot.to_fold_point(point, Bias::Right);
269 *fold_point.column_mut() = self.folds_snapshot.line_len(fold_point.row());
270 point = fold_point.to_buffer_point(&self.folds_snapshot);
271
272 let mut display_point = self.point_to_display_point(point, Bias::Right);
273 *display_point.column_mut() = self.line_len(display_point.row());
274 let next_point = self.display_point_to_point(display_point, Bias::Right);
275 if next_point == point {
276 return (point, display_point);
277 }
278 point = next_point;
279 }
280 }
281
282 pub fn expand_to_line(&self, range: Range<Point>) -> Range<Point> {
283 let mut new_start = self.prev_line_boundary(range.start).0;
284 let mut new_end = self.next_line_boundary(range.end).0;
285
286 if new_start.row == range.start.row && new_end.row == range.end.row {
287 if new_end.row < self.buffer_snapshot.max_point().row {
288 new_end.row += 1;
289 new_end.column = 0;
290 } else if new_start.row > 0 {
291 new_start.row -= 1;
292 new_start.column = self.buffer_snapshot.line_len(new_start.row);
293 }
294 }
295
296 new_start..new_end
297 }
298
299 fn point_to_display_point(&self, point: Point, bias: Bias) -> DisplayPoint {
300 let fold_point = self.folds_snapshot.to_fold_point(point, bias);
301 let tab_point = self.tabs_snapshot.to_tab_point(fold_point);
302 let wrap_point = self.wraps_snapshot.from_tab_point(tab_point);
303 let block_point = self.blocks_snapshot.to_block_point(wrap_point);
304 DisplayPoint(block_point)
305 }
306
307 fn display_point_to_point(&self, point: DisplayPoint, bias: Bias) -> Point {
308 let block_point = point.0;
309 let wrap_point = self.blocks_snapshot.to_wrap_point(block_point);
310 let tab_point = self.wraps_snapshot.to_tab_point(wrap_point);
311 let fold_point = self.tabs_snapshot.to_fold_point(tab_point, bias).0;
312 fold_point.to_buffer_point(&self.folds_snapshot)
313 }
314
315 pub fn max_point(&self) -> DisplayPoint {
316 DisplayPoint(self.blocks_snapshot.max_point())
317 }
318
319 pub fn text_chunks(&self, display_row: u32) -> impl Iterator<Item = &str> {
320 self.blocks_snapshot
321 .chunks(display_row..self.max_point().row() + 1, false, None)
322 .map(|h| h.text)
323 }
324
325 pub fn chunks<'a>(
326 &'a self,
327 display_rows: Range<u32>,
328 language_aware: bool,
329 ) -> DisplayChunks<'a> {
330 self.blocks_snapshot
331 .chunks(display_rows, language_aware, Some(&self.text_highlights))
332 }
333
334 pub fn chars_at<'a>(&'a self, point: DisplayPoint) -> impl Iterator<Item = char> + 'a {
335 let mut column = 0;
336 let mut chars = self.text_chunks(point.row()).flat_map(str::chars);
337 while column < point.column() {
338 if let Some(c) = chars.next() {
339 column += c.len_utf8() as u32;
340 } else {
341 break;
342 }
343 }
344 chars
345 }
346
347 pub fn column_to_chars(&self, display_row: u32, target: u32) -> u32 {
348 let mut count = 0;
349 let mut column = 0;
350 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
351 if column >= target {
352 break;
353 }
354 count += 1;
355 column += c.len_utf8() as u32;
356 }
357 count
358 }
359
360 pub fn column_from_chars(&self, display_row: u32, char_count: u32) -> u32 {
361 let mut count = 0;
362 let mut column = 0;
363 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
364 if c == '\n' || count >= char_count {
365 break;
366 }
367 count += 1;
368 column += c.len_utf8() as u32;
369 }
370 column
371 }
372
373 pub fn clip_point(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
374 let mut clipped = self.blocks_snapshot.clip_point(point.0, bias);
375 if self.clip_at_line_ends {
376 clipped = self.clip_at_line_end(DisplayPoint(clipped)).0
377 }
378 DisplayPoint(clipped)
379 }
380
381 pub fn clip_at_line_end(&self, point: DisplayPoint) -> DisplayPoint {
382 let mut point = point.0;
383 if point.column == self.line_len(point.row) {
384 point.column = point.column.saturating_sub(1);
385 point = self.blocks_snapshot.clip_point(point, Bias::Left);
386 }
387 DisplayPoint(point)
388 }
389
390 pub fn folds_in_range<'a, T>(
391 &'a self,
392 range: Range<T>,
393 ) -> impl Iterator<Item = &'a Range<Anchor>>
394 where
395 T: ToOffset,
396 {
397 self.folds_snapshot.folds_in_range(range)
398 }
399
400 pub fn blocks_in_range<'a>(
401 &'a self,
402 rows: Range<u32>,
403 ) -> impl Iterator<Item = (u32, &'a TransformBlock)> {
404 self.blocks_snapshot.blocks_in_range(rows)
405 }
406
407 pub fn intersects_fold<T: ToOffset>(&self, offset: T) -> bool {
408 self.folds_snapshot.intersects_fold(offset)
409 }
410
411 pub fn is_line_folded(&self, display_row: u32) -> bool {
412 let block_point = BlockPoint(Point::new(display_row, 0));
413 let wrap_point = self.blocks_snapshot.to_wrap_point(block_point);
414 let tab_point = self.wraps_snapshot.to_tab_point(wrap_point);
415 self.folds_snapshot.is_line_folded(tab_point.row())
416 }
417
418 pub fn is_block_line(&self, display_row: u32) -> bool {
419 self.blocks_snapshot.is_block_line(display_row)
420 }
421
422 pub fn soft_wrap_indent(&self, display_row: u32) -> Option<u32> {
423 let wrap_row = self
424 .blocks_snapshot
425 .to_wrap_point(BlockPoint::new(display_row, 0))
426 .row();
427 self.wraps_snapshot.soft_wrap_indent(wrap_row)
428 }
429
430 pub fn text(&self) -> String {
431 self.text_chunks(0).collect()
432 }
433
434 pub fn line(&self, display_row: u32) -> String {
435 let mut result = String::new();
436 for chunk in self.text_chunks(display_row) {
437 if let Some(ix) = chunk.find('\n') {
438 result.push_str(&chunk[0..ix]);
439 break;
440 } else {
441 result.push_str(chunk);
442 }
443 }
444 result
445 }
446
447 pub fn line_indent(&self, display_row: u32) -> (u32, bool) {
448 let mut indent = 0;
449 let mut is_blank = true;
450 for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
451 if c == ' ' {
452 indent += 1;
453 } else {
454 is_blank = c == '\n';
455 break;
456 }
457 }
458 (indent, is_blank)
459 }
460
461 pub fn line_len(&self, row: u32) -> u32 {
462 self.blocks_snapshot.line_len(row)
463 }
464
465 pub fn longest_row(&self) -> u32 {
466 self.blocks_snapshot.longest_row()
467 }
468}
469
470#[derive(Copy, Clone, Default, Eq, Ord, PartialOrd, PartialEq)]
471pub struct DisplayPoint(BlockPoint);
472
473impl Debug for DisplayPoint {
474 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
475 f.write_fmt(format_args!(
476 "DisplayPoint({}, {})",
477 self.row(),
478 self.column()
479 ))
480 }
481}
482
483impl DisplayPoint {
484 pub fn new(row: u32, column: u32) -> Self {
485 Self(BlockPoint(Point::new(row, column)))
486 }
487
488 pub fn zero() -> Self {
489 Self::new(0, 0)
490 }
491
492 pub fn is_zero(&self) -> bool {
493 self.0.is_zero()
494 }
495
496 pub fn row(self) -> u32 {
497 self.0.row
498 }
499
500 pub fn column(self) -> u32 {
501 self.0.column
502 }
503
504 pub fn row_mut(&mut self) -> &mut u32 {
505 &mut self.0.row
506 }
507
508 pub fn column_mut(&mut self) -> &mut u32 {
509 &mut self.0.column
510 }
511
512 pub fn to_point(self, map: &DisplaySnapshot) -> Point {
513 map.display_point_to_point(self, Bias::Left)
514 }
515
516 pub fn to_offset(self, map: &DisplaySnapshot, bias: Bias) -> usize {
517 let unblocked_point = map.blocks_snapshot.to_wrap_point(self.0);
518 let unwrapped_point = map.wraps_snapshot.to_tab_point(unblocked_point);
519 let unexpanded_point = map.tabs_snapshot.to_fold_point(unwrapped_point, bias).0;
520 unexpanded_point.to_buffer_offset(&map.folds_snapshot)
521 }
522}
523
524impl ToDisplayPoint for usize {
525 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
526 map.point_to_display_point(self.to_point(&map.buffer_snapshot), Bias::Left)
527 }
528}
529
530impl ToDisplayPoint for Point {
531 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
532 map.point_to_display_point(*self, Bias::Left)
533 }
534}
535
536impl ToDisplayPoint for Anchor {
537 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
538 self.to_point(&map.buffer_snapshot).to_display_point(map)
539 }
540}
541
542#[cfg(test)]
543pub mod tests {
544 use super::*;
545 use crate::{movement, test::marked_display_snapshot};
546 use gpui::{color::Color, elements::*, test::observe, MutableAppContext};
547 use language::{Buffer, Language, LanguageConfig, RandomCharIter, SelectionGoal};
548 use rand::{prelude::*, Rng};
549 use smol::stream::StreamExt;
550 use std::{env, sync::Arc};
551 use theme::SyntaxTheme;
552 use util::test::{marked_text_ranges, sample_text};
553 use Bias::*;
554
555 #[gpui::test(iterations = 100)]
556 async fn test_random_display_map(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
557 cx.foreground().set_block_on_ticks(0..=50);
558 cx.foreground().forbid_parking();
559 let operations = env::var("OPERATIONS")
560 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
561 .unwrap_or(10);
562
563 let font_cache = cx.font_cache().clone();
564 let tab_size = rng.gen_range(1..=4);
565 let buffer_start_excerpt_header_height = rng.gen_range(1..=5);
566 let excerpt_header_height = rng.gen_range(1..=5);
567 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
568 let font_id = font_cache
569 .select_font(family_id, &Default::default())
570 .unwrap();
571 let font_size = 14.0;
572 let max_wrap_width = 300.0;
573 let mut wrap_width = if rng.gen_bool(0.1) {
574 None
575 } else {
576 Some(rng.gen_range(0.0..=max_wrap_width))
577 };
578
579 log::info!("tab size: {}", tab_size);
580 log::info!("wrap width: {:?}", wrap_width);
581
582 cx.update(|cx| cx.set_global(Settings::test(cx)));
583
584 let buffer = cx.update(|cx| {
585 if rng.gen() {
586 let len = rng.gen_range(0..10);
587 let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
588 MultiBuffer::build_simple(&text, cx)
589 } else {
590 MultiBuffer::build_random(&mut rng, cx)
591 }
592 });
593
594 let map = cx.add_model(|cx| {
595 DisplayMap::new(
596 buffer.clone(),
597 font_id,
598 font_size,
599 wrap_width,
600 buffer_start_excerpt_header_height,
601 excerpt_header_height,
602 cx,
603 )
604 });
605 let mut notifications = observe(&map, cx);
606 let mut fold_count = 0;
607 let mut blocks = Vec::new();
608
609 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
610 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
611 log::info!("fold text: {:?}", snapshot.folds_snapshot.text());
612 log::info!("tab text: {:?}", snapshot.tabs_snapshot.text());
613 log::info!("wrap text: {:?}", snapshot.wraps_snapshot.text());
614 log::info!("block text: {:?}", snapshot.blocks_snapshot.text());
615 log::info!("display text: {:?}", snapshot.text());
616
617 for _i in 0..operations {
618 match rng.gen_range(0..100) {
619 0..=19 => {
620 wrap_width = if rng.gen_bool(0.2) {
621 None
622 } else {
623 Some(rng.gen_range(0.0..=max_wrap_width))
624 };
625 log::info!("setting wrap width to {:?}", wrap_width);
626 map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
627 }
628 20..=44 => {
629 map.update(cx, |map, cx| {
630 if rng.gen() || blocks.is_empty() {
631 let buffer = map.snapshot(cx).buffer_snapshot;
632 let block_properties = (0..rng.gen_range(1..=1))
633 .map(|_| {
634 let position =
635 buffer.anchor_after(buffer.clip_offset(
636 rng.gen_range(0..=buffer.len()),
637 Bias::Left,
638 ));
639
640 let disposition = if rng.gen() {
641 BlockDisposition::Above
642 } else {
643 BlockDisposition::Below
644 };
645 let height = rng.gen_range(1..5);
646 log::info!(
647 "inserting block {:?} {:?} with height {}",
648 disposition,
649 position.to_point(&buffer),
650 height
651 );
652 BlockProperties {
653 position,
654 height,
655 disposition,
656 render: Arc::new(|_| Empty::new().boxed()),
657 }
658 })
659 .collect::<Vec<_>>();
660 blocks.extend(map.insert_blocks(block_properties, cx));
661 } else {
662 blocks.shuffle(&mut rng);
663 let remove_count = rng.gen_range(1..=4.min(blocks.len()));
664 let block_ids_to_remove = (0..remove_count)
665 .map(|_| blocks.remove(rng.gen_range(0..blocks.len())))
666 .collect();
667 log::info!("removing block ids {:?}", block_ids_to_remove);
668 map.remove_blocks(block_ids_to_remove, cx);
669 }
670 });
671 }
672 45..=79 => {
673 let mut ranges = Vec::new();
674 for _ in 0..rng.gen_range(1..=3) {
675 buffer.read_with(cx, |buffer, cx| {
676 let buffer = buffer.read(cx);
677 let end = buffer.clip_offset(rng.gen_range(0..=buffer.len()), Right);
678 let start = buffer.clip_offset(rng.gen_range(0..=end), Left);
679 ranges.push(start..end);
680 });
681 }
682
683 if rng.gen() && fold_count > 0 {
684 log::info!("unfolding ranges: {:?}", ranges);
685 map.update(cx, |map, cx| {
686 map.unfold(ranges, true, cx);
687 });
688 } else {
689 log::info!("folding ranges: {:?}", ranges);
690 map.update(cx, |map, cx| {
691 map.fold(ranges, cx);
692 });
693 }
694 }
695 _ => {
696 buffer.update(cx, |buffer, cx| buffer.randomly_edit(&mut rng, 5, cx));
697 }
698 }
699
700 if map.read_with(cx, |map, cx| map.is_rewrapping(cx)) {
701 notifications.next().await.unwrap();
702 }
703
704 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
705 fold_count = snapshot.fold_count();
706 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
707 log::info!("fold text: {:?}", snapshot.folds_snapshot.text());
708 log::info!("tab text: {:?}", snapshot.tabs_snapshot.text());
709 log::info!("wrap text: {:?}", snapshot.wraps_snapshot.text());
710 log::info!("block text: {:?}", snapshot.blocks_snapshot.text());
711 log::info!("display text: {:?}", snapshot.text());
712
713 // Line boundaries
714 let buffer = &snapshot.buffer_snapshot;
715 for _ in 0..5 {
716 let row = rng.gen_range(0..=buffer.max_point().row);
717 let column = rng.gen_range(0..=buffer.line_len(row));
718 let point = buffer.clip_point(Point::new(row, column), Left);
719
720 let (prev_buffer_bound, prev_display_bound) = snapshot.prev_line_boundary(point);
721 let (next_buffer_bound, next_display_bound) = snapshot.next_line_boundary(point);
722
723 assert!(prev_buffer_bound <= point);
724 assert!(next_buffer_bound >= point);
725 assert_eq!(prev_buffer_bound.column, 0);
726 assert_eq!(prev_display_bound.column(), 0);
727 if next_buffer_bound < buffer.max_point() {
728 assert_eq!(buffer.chars_at(next_buffer_bound).next(), Some('\n'));
729 }
730
731 assert_eq!(
732 prev_display_bound,
733 prev_buffer_bound.to_display_point(&snapshot),
734 "row boundary before {:?}. reported buffer row boundary: {:?}",
735 point,
736 prev_buffer_bound
737 );
738 assert_eq!(
739 next_display_bound,
740 next_buffer_bound.to_display_point(&snapshot),
741 "display row boundary after {:?}. reported buffer row boundary: {:?}",
742 point,
743 next_buffer_bound
744 );
745 assert_eq!(
746 prev_buffer_bound,
747 prev_display_bound.to_point(&snapshot),
748 "row boundary before {:?}. reported display row boundary: {:?}",
749 point,
750 prev_display_bound
751 );
752 assert_eq!(
753 next_buffer_bound,
754 next_display_bound.to_point(&snapshot),
755 "row boundary after {:?}. reported display row boundary: {:?}",
756 point,
757 next_display_bound
758 );
759 }
760
761 // Movement
762 let min_point = snapshot.clip_point(DisplayPoint::new(0, 0), Left);
763 let max_point = snapshot.clip_point(snapshot.max_point(), Right);
764 for _ in 0..5 {
765 let row = rng.gen_range(0..=snapshot.max_point().row());
766 let column = rng.gen_range(0..=snapshot.line_len(row));
767 let point = snapshot.clip_point(DisplayPoint::new(row, column), Left);
768
769 log::info!("Moving from point {:?}", point);
770
771 let moved_right = movement::right(&snapshot, point);
772 log::info!("Right {:?}", moved_right);
773 if point < max_point {
774 assert!(moved_right > point);
775 if point.column() == snapshot.line_len(point.row())
776 || snapshot.soft_wrap_indent(point.row()).is_some()
777 && point.column() == snapshot.line_len(point.row()) - 1
778 {
779 assert!(moved_right.row() > point.row());
780 }
781 } else {
782 assert_eq!(moved_right, point);
783 }
784
785 let moved_left = movement::left(&snapshot, point);
786 log::info!("Left {:?}", moved_left);
787 if point > min_point {
788 assert!(moved_left < point);
789 if point.column() == 0 {
790 assert!(moved_left.row() < point.row());
791 }
792 } else {
793 assert_eq!(moved_left, point);
794 }
795 }
796 }
797 }
798
799 #[gpui::test(retries = 5)]
800 fn test_soft_wraps(cx: &mut MutableAppContext) {
801 cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
802 cx.foreground().forbid_parking();
803
804 let font_cache = cx.font_cache();
805
806 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
807 let font_id = font_cache
808 .select_font(family_id, &Default::default())
809 .unwrap();
810 let font_size = 12.0;
811 let wrap_width = Some(64.);
812 cx.set_global(Settings::test(cx));
813
814 let text = "one two three four five\nsix seven eight";
815 let buffer = MultiBuffer::build_simple(text, cx);
816 let map = cx.add_model(|cx| {
817 DisplayMap::new(buffer.clone(), font_id, font_size, wrap_width, 1, 1, cx)
818 });
819
820 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
821 assert_eq!(
822 snapshot.text_chunks(0).collect::<String>(),
823 "one two \nthree four \nfive\nsix seven \neight"
824 );
825 assert_eq!(
826 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Left),
827 DisplayPoint::new(0, 7)
828 );
829 assert_eq!(
830 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Right),
831 DisplayPoint::new(1, 0)
832 );
833 assert_eq!(
834 movement::right(&snapshot, DisplayPoint::new(0, 7)),
835 DisplayPoint::new(1, 0)
836 );
837 assert_eq!(
838 movement::left(&snapshot, DisplayPoint::new(1, 0)),
839 DisplayPoint::new(0, 7)
840 );
841 assert_eq!(
842 movement::up(
843 &snapshot,
844 DisplayPoint::new(1, 10),
845 SelectionGoal::None,
846 false
847 ),
848 (DisplayPoint::new(0, 7), SelectionGoal::Column(10))
849 );
850 assert_eq!(
851 movement::down(
852 &snapshot,
853 DisplayPoint::new(0, 7),
854 SelectionGoal::Column(10),
855 false
856 ),
857 (DisplayPoint::new(1, 10), SelectionGoal::Column(10))
858 );
859 assert_eq!(
860 movement::down(
861 &snapshot,
862 DisplayPoint::new(1, 10),
863 SelectionGoal::Column(10),
864 false
865 ),
866 (DisplayPoint::new(2, 4), SelectionGoal::Column(10))
867 );
868
869 let ix = snapshot.buffer_snapshot.text().find("seven").unwrap();
870 buffer.update(cx, |buffer, cx| {
871 buffer.edit([(ix..ix, "and ")], cx);
872 });
873
874 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
875 assert_eq!(
876 snapshot.text_chunks(1).collect::<String>(),
877 "three four \nfive\nsix and \nseven eight"
878 );
879
880 // Re-wrap on font size changes
881 map.update(cx, |map, cx| map.set_font(font_id, font_size + 3., cx));
882
883 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
884 assert_eq!(
885 snapshot.text_chunks(1).collect::<String>(),
886 "three \nfour five\nsix and \nseven \neight"
887 )
888 }
889
890 #[gpui::test]
891 fn test_text_chunks(cx: &mut gpui::MutableAppContext) {
892 cx.set_global(Settings::test(cx));
893 let text = sample_text(6, 6, 'a');
894 let buffer = MultiBuffer::build_simple(&text, cx);
895 let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap();
896 let font_id = cx
897 .font_cache()
898 .select_font(family_id, &Default::default())
899 .unwrap();
900 let font_size = 14.0;
901 let map =
902 cx.add_model(|cx| DisplayMap::new(buffer.clone(), font_id, font_size, None, 1, 1, cx));
903 buffer.update(cx, |buffer, cx| {
904 buffer.edit(
905 vec![
906 (Point::new(1, 0)..Point::new(1, 0), "\t"),
907 (Point::new(1, 1)..Point::new(1, 1), "\t"),
908 (Point::new(2, 1)..Point::new(2, 1), "\t"),
909 ],
910 cx,
911 )
912 });
913
914 assert_eq!(
915 map.update(cx, |map, cx| map.snapshot(cx))
916 .text_chunks(1)
917 .collect::<String>()
918 .lines()
919 .next(),
920 Some(" b bbbbb")
921 );
922 assert_eq!(
923 map.update(cx, |map, cx| map.snapshot(cx))
924 .text_chunks(2)
925 .collect::<String>()
926 .lines()
927 .next(),
928 Some("c ccccc")
929 );
930 }
931
932 #[gpui::test]
933 async fn test_chunks(cx: &mut gpui::TestAppContext) {
934 use unindent::Unindent as _;
935
936 let text = r#"
937 fn outer() {}
938
939 mod module {
940 fn inner() {}
941 }"#
942 .unindent();
943
944 let theme = SyntaxTheme::new(vec![
945 ("mod.body".to_string(), Color::red().into()),
946 ("fn.name".to_string(), Color::blue().into()),
947 ]);
948 let language = Arc::new(
949 Language::new(
950 LanguageConfig {
951 name: "Test".into(),
952 path_suffixes: vec![".test".to_string()],
953 ..Default::default()
954 },
955 Some(tree_sitter_rust::language()),
956 )
957 .with_highlights_query(
958 r#"
959 (mod_item name: (identifier) body: _ @mod.body)
960 (function_item name: (identifier) @fn.name)
961 "#,
962 )
963 .unwrap(),
964 );
965 language.set_theme(&theme);
966 cx.update(|cx| {
967 cx.set_global(Settings {
968 tab_size: 2,
969 ..Settings::test(cx)
970 })
971 });
972
973 let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
974 buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
975 let buffer = cx.add_model(|cx| MultiBuffer::singleton(buffer, cx));
976
977 let font_cache = cx.font_cache();
978 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
979 let font_id = font_cache
980 .select_font(family_id, &Default::default())
981 .unwrap();
982 let font_size = 14.0;
983
984 let map = cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
985 assert_eq!(
986 cx.update(|cx| syntax_chunks(0..5, &map, &theme, cx)),
987 vec![
988 ("fn ".to_string(), None),
989 ("outer".to_string(), Some(Color::blue())),
990 ("() {}\n\nmod module ".to_string(), None),
991 ("{\n fn ".to_string(), Some(Color::red())),
992 ("inner".to_string(), Some(Color::blue())),
993 ("() {}\n}".to_string(), Some(Color::red())),
994 ]
995 );
996 assert_eq!(
997 cx.update(|cx| syntax_chunks(3..5, &map, &theme, cx)),
998 vec![
999 (" fn ".to_string(), Some(Color::red())),
1000 ("inner".to_string(), Some(Color::blue())),
1001 ("() {}\n}".to_string(), Some(Color::red())),
1002 ]
1003 );
1004
1005 map.update(cx, |map, cx| {
1006 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
1007 });
1008 assert_eq!(
1009 cx.update(|cx| syntax_chunks(0..2, &map, &theme, cx)),
1010 vec![
1011 ("fn ".to_string(), None),
1012 ("out".to_string(), Some(Color::blue())),
1013 ("…".to_string(), None),
1014 (" fn ".to_string(), Some(Color::red())),
1015 ("inner".to_string(), Some(Color::blue())),
1016 ("() {}\n}".to_string(), Some(Color::red())),
1017 ]
1018 );
1019 }
1020
1021 #[gpui::test]
1022 async fn test_chunks_with_soft_wrapping(cx: &mut gpui::TestAppContext) {
1023 use unindent::Unindent as _;
1024
1025 cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
1026
1027 let text = r#"
1028 fn outer() {}
1029
1030 mod module {
1031 fn inner() {}
1032 }"#
1033 .unindent();
1034
1035 let theme = SyntaxTheme::new(vec![
1036 ("mod.body".to_string(), Color::red().into()),
1037 ("fn.name".to_string(), Color::blue().into()),
1038 ]);
1039 let language = Arc::new(
1040 Language::new(
1041 LanguageConfig {
1042 name: "Test".into(),
1043 path_suffixes: vec![".test".to_string()],
1044 ..Default::default()
1045 },
1046 Some(tree_sitter_rust::language()),
1047 )
1048 .with_highlights_query(
1049 r#"
1050 (mod_item name: (identifier) body: _ @mod.body)
1051 (function_item name: (identifier) @fn.name)
1052 "#,
1053 )
1054 .unwrap(),
1055 );
1056 language.set_theme(&theme);
1057
1058 cx.update(|cx| cx.set_global(Settings::test(cx)));
1059
1060 let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
1061 buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
1062 let buffer = cx.add_model(|cx| MultiBuffer::singleton(buffer, cx));
1063
1064 let font_cache = cx.font_cache();
1065
1066 let family_id = font_cache.load_family(&["Courier"]).unwrap();
1067 let font_id = font_cache
1068 .select_font(family_id, &Default::default())
1069 .unwrap();
1070 let font_size = 16.0;
1071
1072 let map =
1073 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, Some(40.0), 1, 1, cx));
1074 assert_eq!(
1075 cx.update(|cx| syntax_chunks(0..5, &map, &theme, cx)),
1076 [
1077 ("fn \n".to_string(), None),
1078 ("oute\nr".to_string(), Some(Color::blue())),
1079 ("() \n{}\n\n".to_string(), None),
1080 ]
1081 );
1082 assert_eq!(
1083 cx.update(|cx| syntax_chunks(3..5, &map, &theme, cx)),
1084 [("{}\n\n".to_string(), None)]
1085 );
1086
1087 map.update(cx, |map, cx| {
1088 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
1089 });
1090 assert_eq!(
1091 cx.update(|cx| syntax_chunks(1..4, &map, &theme, cx)),
1092 [
1093 ("out".to_string(), Some(Color::blue())),
1094 ("…\n".to_string(), None),
1095 (" \nfn ".to_string(), Some(Color::red())),
1096 ("i\n".to_string(), Some(Color::blue()))
1097 ]
1098 );
1099 }
1100
1101 #[gpui::test]
1102 async fn test_chunks_with_text_highlights(cx: &mut gpui::TestAppContext) {
1103 cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
1104
1105 cx.update(|cx| cx.set_global(Settings::test(cx)));
1106 let theme = SyntaxTheme::new(vec![
1107 ("operator".to_string(), Color::red().into()),
1108 ("string".to_string(), Color::green().into()),
1109 ]);
1110 let language = Arc::new(
1111 Language::new(
1112 LanguageConfig {
1113 name: "Test".into(),
1114 path_suffixes: vec![".test".to_string()],
1115 ..Default::default()
1116 },
1117 Some(tree_sitter_rust::language()),
1118 )
1119 .with_highlights_query(
1120 r#"
1121 ":" @operator
1122 (string_literal) @string
1123 "#,
1124 )
1125 .unwrap(),
1126 );
1127 language.set_theme(&theme);
1128
1129 let (text, highlighted_ranges) = marked_text_ranges(r#"const[] [a]: B = "c [d]""#);
1130
1131 let buffer = cx.add_model(|cx| Buffer::new(0, text, cx).with_language(language, cx));
1132 buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
1133
1134 let buffer = cx.add_model(|cx| MultiBuffer::singleton(buffer, cx));
1135 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
1136
1137 let font_cache = cx.font_cache();
1138 let family_id = font_cache.load_family(&["Courier"]).unwrap();
1139 let font_id = font_cache
1140 .select_font(family_id, &Default::default())
1141 .unwrap();
1142 let font_size = 16.0;
1143 let map = cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
1144
1145 enum MyType {}
1146
1147 let style = HighlightStyle {
1148 color: Some(Color::blue()),
1149 ..Default::default()
1150 };
1151
1152 map.update(cx, |map, _cx| {
1153 map.highlight_text(
1154 TypeId::of::<MyType>(),
1155 highlighted_ranges
1156 .into_iter()
1157 .map(|range| {
1158 buffer_snapshot.anchor_before(range.start)
1159 ..buffer_snapshot.anchor_before(range.end)
1160 })
1161 .collect(),
1162 style,
1163 );
1164 });
1165
1166 assert_eq!(
1167 cx.update(|cx| chunks(0..10, &map, &theme, cx)),
1168 [
1169 ("const ".to_string(), None, None),
1170 ("a".to_string(), None, Some(Color::blue())),
1171 (":".to_string(), Some(Color::red()), None),
1172 (" B = ".to_string(), None, None),
1173 ("\"c ".to_string(), Some(Color::green()), None),
1174 ("d".to_string(), Some(Color::green()), Some(Color::blue())),
1175 ("\"".to_string(), Some(Color::green()), None),
1176 ]
1177 );
1178 }
1179
1180 #[gpui::test]
1181 fn test_clip_point(cx: &mut gpui::MutableAppContext) {
1182 cx.set_global(Settings::test(cx));
1183 fn assert(text: &str, shift_right: bool, bias: Bias, cx: &mut gpui::MutableAppContext) {
1184 let (unmarked_snapshot, mut markers) = marked_display_snapshot(text, cx);
1185
1186 match bias {
1187 Bias::Left => {
1188 if shift_right {
1189 *markers[1].column_mut() += 1;
1190 }
1191
1192 assert_eq!(unmarked_snapshot.clip_point(markers[1], bias), markers[0])
1193 }
1194 Bias::Right => {
1195 if shift_right {
1196 *markers[0].column_mut() += 1;
1197 }
1198
1199 assert_eq!(unmarked_snapshot.clip_point(markers[0], bias), markers[1])
1200 }
1201 };
1202 }
1203
1204 use Bias::{Left, Right};
1205 assert("||α", false, Left, cx);
1206 assert("||α", true, Left, cx);
1207 assert("||α", false, Right, cx);
1208 assert("|α|", true, Right, cx);
1209 assert("||✋", false, Left, cx);
1210 assert("||✋", true, Left, cx);
1211 assert("||✋", false, Right, cx);
1212 assert("|✋|", true, Right, cx);
1213 assert("||🍐", false, Left, cx);
1214 assert("||🍐", true, Left, cx);
1215 assert("||🍐", false, Right, cx);
1216 assert("|🍐|", true, Right, cx);
1217 assert("||\t", false, Left, cx);
1218 assert("||\t", true, Left, cx);
1219 assert("||\t", false, Right, cx);
1220 assert("|\t|", true, Right, cx);
1221 assert(" ||\t", false, Left, cx);
1222 assert(" ||\t", true, Left, cx);
1223 assert(" ||\t", false, Right, cx);
1224 assert(" |\t|", true, Right, cx);
1225 assert(" ||\t", false, Left, cx);
1226 assert(" ||\t", false, Right, cx);
1227 }
1228
1229 #[gpui::test]
1230 fn test_clip_at_line_ends(cx: &mut gpui::MutableAppContext) {
1231 cx.set_global(Settings::test(cx));
1232
1233 fn assert(text: &str, cx: &mut gpui::MutableAppContext) {
1234 let (mut unmarked_snapshot, markers) = marked_display_snapshot(text, cx);
1235 unmarked_snapshot.clip_at_line_ends = true;
1236 assert_eq!(
1237 unmarked_snapshot.clip_point(markers[1], Bias::Left),
1238 markers[0]
1239 );
1240 }
1241
1242 assert("||", cx);
1243 assert("|a|", cx);
1244 assert("a|b|", cx);
1245 assert("a|α|", cx);
1246 }
1247
1248 #[gpui::test]
1249 fn test_tabs_with_multibyte_chars(cx: &mut gpui::MutableAppContext) {
1250 cx.set_global(Settings::test(cx));
1251 let text = "✅\t\tα\nβ\t\n🏀β\t\tγ";
1252 let buffer = MultiBuffer::build_simple(text, cx);
1253 let font_cache = cx.font_cache();
1254 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
1255 let font_id = font_cache
1256 .select_font(family_id, &Default::default())
1257 .unwrap();
1258 let font_size = 14.0;
1259
1260 let map =
1261 cx.add_model(|cx| DisplayMap::new(buffer.clone(), font_id, font_size, None, 1, 1, cx));
1262 let map = map.update(cx, |map, cx| map.snapshot(cx));
1263 assert_eq!(map.text(), "✅ α\nβ \n🏀β γ");
1264 assert_eq!(
1265 map.text_chunks(0).collect::<String>(),
1266 "✅ α\nβ \n🏀β γ"
1267 );
1268 assert_eq!(map.text_chunks(1).collect::<String>(), "β \n🏀β γ");
1269 assert_eq!(map.text_chunks(2).collect::<String>(), "🏀β γ");
1270
1271 let point = Point::new(0, "✅\t\t".len() as u32);
1272 let display_point = DisplayPoint::new(0, "✅ ".len() as u32);
1273 assert_eq!(point.to_display_point(&map), display_point);
1274 assert_eq!(display_point.to_point(&map), point);
1275
1276 let point = Point::new(1, "β\t".len() as u32);
1277 let display_point = DisplayPoint::new(1, "β ".len() as u32);
1278 assert_eq!(point.to_display_point(&map), display_point);
1279 assert_eq!(display_point.to_point(&map), point,);
1280
1281 let point = Point::new(2, "🏀β\t\t".len() as u32);
1282 let display_point = DisplayPoint::new(2, "🏀β ".len() as u32);
1283 assert_eq!(point.to_display_point(&map), display_point);
1284 assert_eq!(display_point.to_point(&map), point,);
1285
1286 // Display points inside of expanded tabs
1287 assert_eq!(
1288 DisplayPoint::new(0, "✅ ".len() as u32).to_point(&map),
1289 Point::new(0, "✅\t".len() as u32),
1290 );
1291 assert_eq!(
1292 DisplayPoint::new(0, "✅ ".len() as u32).to_point(&map),
1293 Point::new(0, "✅".len() as u32),
1294 );
1295
1296 // Clipping display points inside of multi-byte characters
1297 assert_eq!(
1298 map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Left),
1299 DisplayPoint::new(0, 0)
1300 );
1301 assert_eq!(
1302 map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Bias::Right),
1303 DisplayPoint::new(0, "✅".len() as u32)
1304 );
1305 }
1306
1307 #[gpui::test]
1308 fn test_max_point(cx: &mut gpui::MutableAppContext) {
1309 cx.set_global(Settings::test(cx));
1310 let buffer = MultiBuffer::build_simple("aaa\n\t\tbbb", cx);
1311 let font_cache = cx.font_cache();
1312 let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
1313 let font_id = font_cache
1314 .select_font(family_id, &Default::default())
1315 .unwrap();
1316 let font_size = 14.0;
1317 let map =
1318 cx.add_model(|cx| DisplayMap::new(buffer.clone(), font_id, font_size, None, 1, 1, cx));
1319 assert_eq!(
1320 map.update(cx, |map, cx| map.snapshot(cx)).max_point(),
1321 DisplayPoint::new(1, 11)
1322 )
1323 }
1324
1325 fn syntax_chunks<'a>(
1326 rows: Range<u32>,
1327 map: &ModelHandle<DisplayMap>,
1328 theme: &'a SyntaxTheme,
1329 cx: &mut MutableAppContext,
1330 ) -> Vec<(String, Option<Color>)> {
1331 chunks(rows, map, theme, cx)
1332 .into_iter()
1333 .map(|(text, color, _)| (text, color))
1334 .collect()
1335 }
1336
1337 fn chunks<'a>(
1338 rows: Range<u32>,
1339 map: &ModelHandle<DisplayMap>,
1340 theme: &'a SyntaxTheme,
1341 cx: &mut MutableAppContext,
1342 ) -> Vec<(String, Option<Color>, Option<Color>)> {
1343 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1344 let mut chunks: Vec<(String, Option<Color>, Option<Color>)> = Vec::new();
1345 for chunk in snapshot.chunks(rows, true) {
1346 let syntax_color = chunk
1347 .syntax_highlight_id
1348 .and_then(|id| id.style(theme)?.color);
1349 let highlight_color = chunk.highlight_style.and_then(|style| style.color);
1350 if let Some((last_chunk, last_syntax_color, last_highlight_color)) = chunks.last_mut() {
1351 if syntax_color == *last_syntax_color && highlight_color == *last_highlight_color {
1352 last_chunk.push_str(chunk.text);
1353 continue;
1354 }
1355 }
1356 chunks.push((chunk.text.to_string(), syntax_color, highlight_color));
1357 }
1358 chunks
1359 }
1360}