1use super::{Bias, DisplayPoint, DisplaySnapshot, SelectionGoal, ToDisplayPoint};
2use crate::{char_kind, CharKind, ToOffset, ToPoint};
3use language::Point;
4use std::ops::Range;
5
6#[derive(Debug, PartialEq)]
7pub enum FindRange {
8 SingleLine,
9 MultiLine,
10}
11
12pub fn left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
13 if point.column() > 0 {
14 *point.column_mut() -= 1;
15 } else if point.row() > 0 {
16 *point.row_mut() -= 1;
17 *point.column_mut() = map.line_len(point.row());
18 }
19 map.clip_point(point, Bias::Left)
20}
21
22pub fn saturating_left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
23 if point.column() > 0 {
24 *point.column_mut() -= 1;
25 }
26 map.clip_point(point, Bias::Left)
27}
28
29pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
30 let max_column = map.line_len(point.row());
31 if point.column() < max_column {
32 *point.column_mut() += 1;
33 } else if point.row() < map.max_point().row() {
34 *point.row_mut() += 1;
35 *point.column_mut() = 0;
36 }
37 map.clip_point(point, Bias::Right)
38}
39
40pub fn saturating_right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
41 *point.column_mut() += 1;
42 map.clip_point(point, Bias::Right)
43}
44
45pub fn up(
46 map: &DisplaySnapshot,
47 start: DisplayPoint,
48 goal: SelectionGoal,
49 preserve_column_at_start: bool,
50) -> (DisplayPoint, SelectionGoal) {
51 up_by_rows(map, start, 1, goal, preserve_column_at_start)
52}
53
54pub fn down(
55 map: &DisplaySnapshot,
56 start: DisplayPoint,
57 goal: SelectionGoal,
58 preserve_column_at_end: bool,
59) -> (DisplayPoint, SelectionGoal) {
60 down_by_rows(map, start, 1, goal, preserve_column_at_end)
61}
62
63pub fn up_by_rows(
64 map: &DisplaySnapshot,
65 start: DisplayPoint,
66 row_count: u32,
67 goal: SelectionGoal,
68 preserve_column_at_start: bool,
69) -> (DisplayPoint, SelectionGoal) {
70 let mut goal_column = match goal {
71 SelectionGoal::Column(column) => column,
72 SelectionGoal::ColumnRange { end, .. } => end,
73 _ => map.column_to_chars(start.row(), start.column()),
74 };
75
76 let prev_row = start.row().saturating_sub(row_count);
77 let mut point = map.clip_point(
78 DisplayPoint::new(prev_row, map.line_len(prev_row)),
79 Bias::Left,
80 );
81 if point.row() < start.row() {
82 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
83 } else if preserve_column_at_start {
84 return (start, goal);
85 } else {
86 point = DisplayPoint::new(0, 0);
87 goal_column = 0;
88 }
89
90 let mut clipped_point = map.clip_point(point, Bias::Left);
91 if clipped_point.row() < point.row() {
92 clipped_point = map.clip_point(point, Bias::Right);
93 }
94 (clipped_point, SelectionGoal::Column(goal_column))
95}
96
97pub fn down_by_rows(
98 map: &DisplaySnapshot,
99 start: DisplayPoint,
100 row_count: u32,
101 goal: SelectionGoal,
102 preserve_column_at_end: bool,
103) -> (DisplayPoint, SelectionGoal) {
104 let mut goal_column = match goal {
105 SelectionGoal::Column(column) => column,
106 SelectionGoal::ColumnRange { end, .. } => end,
107 _ => map.column_to_chars(start.row(), start.column()),
108 };
109
110 let new_row = start.row() + row_count;
111 let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
112 if point.row() > start.row() {
113 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
114 } else if preserve_column_at_end {
115 return (start, goal);
116 } else {
117 point = map.max_point();
118 goal_column = map.column_to_chars(point.row(), point.column())
119 }
120
121 let mut clipped_point = map.clip_point(point, Bias::Right);
122 if clipped_point.row() > point.row() {
123 clipped_point = map.clip_point(point, Bias::Left);
124 }
125 (clipped_point, SelectionGoal::Column(goal_column))
126}
127
128pub fn line_beginning(
129 map: &DisplaySnapshot,
130 display_point: DisplayPoint,
131 stop_at_soft_boundaries: bool,
132) -> DisplayPoint {
133 let point = display_point.to_point(map);
134 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
135 let line_start = map.prev_line_boundary(point).1;
136
137 if stop_at_soft_boundaries && display_point != soft_line_start {
138 soft_line_start
139 } else {
140 line_start
141 }
142}
143
144pub fn indented_line_beginning(
145 map: &DisplaySnapshot,
146 display_point: DisplayPoint,
147 stop_at_soft_boundaries: bool,
148) -> DisplayPoint {
149 let point = display_point.to_point(map);
150 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
151 let indent_start = Point::new(
152 point.row,
153 map.buffer_snapshot.indent_size_for_line(point.row).len,
154 )
155 .to_display_point(map);
156 let line_start = map.prev_line_boundary(point).1;
157
158 if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
159 {
160 soft_line_start
161 } else if stop_at_soft_boundaries && display_point != indent_start {
162 indent_start
163 } else {
164 line_start
165 }
166}
167
168pub fn line_end(
169 map: &DisplaySnapshot,
170 display_point: DisplayPoint,
171 stop_at_soft_boundaries: bool,
172) -> DisplayPoint {
173 let soft_line_end = map.clip_point(
174 DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
175 Bias::Left,
176 );
177 if stop_at_soft_boundaries && display_point != soft_line_end {
178 soft_line_end
179 } else {
180 map.next_line_boundary(display_point.to_point(map)).1
181 }
182}
183
184pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
185 let raw_point = point.to_point(map);
186 let scope = map.buffer_snapshot.language_scope_at(raw_point);
187
188 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
189 (char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace())
190 || left == '\n'
191 })
192}
193
194pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
195 let raw_point = point.to_point(map);
196 let scope = map.buffer_snapshot.language_scope_at(raw_point);
197
198 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
199 let is_word_start =
200 char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace();
201 let is_subword_start =
202 left == '_' && right != '_' || left.is_lowercase() && right.is_uppercase();
203 is_word_start || is_subword_start || left == '\n'
204 })
205}
206
207pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
208 let raw_point = point.to_point(map);
209 let scope = map.buffer_snapshot.language_scope_at(raw_point);
210
211 find_boundary(map, point, FindRange::MultiLine, |left, right| {
212 (char_kind(&scope, left) != char_kind(&scope, right) && !left.is_whitespace())
213 || right == '\n'
214 })
215}
216
217pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
218 let raw_point = point.to_point(map);
219 let scope = map.buffer_snapshot.language_scope_at(raw_point);
220
221 find_boundary(map, point, FindRange::MultiLine, |left, right| {
222 let is_word_end =
223 (char_kind(&scope, left) != char_kind(&scope, right)) && !left.is_whitespace();
224 let is_subword_end =
225 left != '_' && right == '_' || left.is_lowercase() && right.is_uppercase();
226 is_word_end || is_subword_end || right == '\n'
227 })
228}
229
230pub fn start_of_paragraph(
231 map: &DisplaySnapshot,
232 display_point: DisplayPoint,
233 mut count: usize,
234) -> DisplayPoint {
235 let point = display_point.to_point(map);
236 if point.row == 0 {
237 return DisplayPoint::zero();
238 }
239
240 let mut found_non_blank_line = false;
241 for row in (0..point.row + 1).rev() {
242 let blank = map.buffer_snapshot.is_line_blank(row);
243 if found_non_blank_line && blank {
244 if count <= 1 {
245 return Point::new(row, 0).to_display_point(map);
246 }
247 count -= 1;
248 found_non_blank_line = false;
249 }
250
251 found_non_blank_line |= !blank;
252 }
253
254 DisplayPoint::zero()
255}
256
257pub fn end_of_paragraph(
258 map: &DisplaySnapshot,
259 display_point: DisplayPoint,
260 mut count: usize,
261) -> DisplayPoint {
262 let point = display_point.to_point(map);
263 if point.row == map.max_buffer_row() {
264 return map.max_point();
265 }
266
267 let mut found_non_blank_line = false;
268 for row in point.row..map.max_buffer_row() + 1 {
269 let blank = map.buffer_snapshot.is_line_blank(row);
270 if found_non_blank_line && blank {
271 if count <= 1 {
272 return Point::new(row, 0).to_display_point(map);
273 }
274 count -= 1;
275 found_non_blank_line = false;
276 }
277
278 found_non_blank_line |= !blank;
279 }
280
281 map.max_point()
282}
283
284/// Scans for a boundary preceding the given start point `from` until a boundary is found,
285/// indicated by the given predicate returning true.
286/// The predicate is called with the character to the left and right of the candidate boundary location.
287/// If FindRange::SingleLine is specified and no boundary is found before the start of the current line, the start of the current line will be returned.
288pub fn find_preceding_boundary(
289 map: &DisplaySnapshot,
290 from: DisplayPoint,
291 find_range: FindRange,
292 mut is_boundary: impl FnMut(char, char) -> bool,
293) -> DisplayPoint {
294 let mut prev_ch = None;
295 let mut offset = from.to_point(map).to_offset(&map.buffer_snapshot);
296
297 for ch in map.buffer_snapshot.reversed_chars_at(offset) {
298 if find_range == FindRange::SingleLine && ch == '\n' {
299 break;
300 }
301 if let Some(prev_ch) = prev_ch {
302 if is_boundary(ch, prev_ch) {
303 break;
304 }
305 }
306
307 offset -= ch.len_utf8();
308 prev_ch = Some(ch);
309 }
310
311 map.clip_point(offset.to_display_point(map), Bias::Left)
312}
313
314/// Scans for a boundary following the given start point until a boundary is found, indicated by the
315/// given predicate returning true. The predicate is called with the character to the left and right
316/// of the candidate boundary location, and will be called with `\n` characters indicating the start
317/// or end of a line.
318pub fn find_boundary(
319 map: &DisplaySnapshot,
320 from: DisplayPoint,
321 find_range: FindRange,
322 mut is_boundary: impl FnMut(char, char) -> bool,
323) -> DisplayPoint {
324 let mut offset = from.to_offset(&map, Bias::Right);
325 let mut prev_ch = None;
326
327 for ch in map.buffer_snapshot.chars_at(offset) {
328 if find_range == FindRange::SingleLine && ch == '\n' {
329 break;
330 }
331 if let Some(prev_ch) = prev_ch {
332 if is_boundary(prev_ch, ch) {
333 break;
334 }
335 }
336
337 offset += ch.len_utf8();
338 prev_ch = Some(ch);
339 }
340 map.clip_point(offset.to_display_point(map), Bias::Right)
341}
342
343pub fn is_inside_word(map: &DisplaySnapshot, point: DisplayPoint) -> bool {
344 let raw_point = point.to_point(map);
345 let scope = map.buffer_snapshot.language_scope_at(raw_point);
346 let ix = map.clip_point(point, Bias::Left).to_offset(map, Bias::Left);
347 let text = &map.buffer_snapshot;
348 let next_char_kind = text.chars_at(ix).next().map(|c| char_kind(&scope, c));
349 let prev_char_kind = text
350 .reversed_chars_at(ix)
351 .next()
352 .map(|c| char_kind(&scope, c));
353 prev_char_kind.zip(next_char_kind) == Some((CharKind::Word, CharKind::Word))
354}
355
356pub fn surrounding_word(map: &DisplaySnapshot, position: DisplayPoint) -> Range<DisplayPoint> {
357 let position = map
358 .clip_point(position, Bias::Left)
359 .to_offset(map, Bias::Left);
360 let (range, _) = map.buffer_snapshot.surrounding_word(position);
361 let start = range
362 .start
363 .to_point(&map.buffer_snapshot)
364 .to_display_point(map);
365 let end = range
366 .end
367 .to_point(&map.buffer_snapshot)
368 .to_display_point(map);
369 start..end
370}
371
372pub fn split_display_range_by_lines(
373 map: &DisplaySnapshot,
374 range: Range<DisplayPoint>,
375) -> Vec<Range<DisplayPoint>> {
376 let mut result = Vec::new();
377
378 let mut start = range.start;
379 // Loop over all the covered rows until the one containing the range end
380 for row in range.start.row()..range.end.row() {
381 let row_end_column = map.line_len(row);
382 let end = map.clip_point(DisplayPoint::new(row, row_end_column), Bias::Left);
383 if start != end {
384 result.push(start..end);
385 }
386 start = map.clip_point(DisplayPoint::new(row + 1, 0), Bias::Left);
387 }
388
389 // Add the final range from the start of the last end to the original range end.
390 result.push(start..range.end);
391
392 result
393}
394
395#[cfg(test)]
396mod tests {
397 use super::*;
398 use crate::{
399 display_map::Inlay, test::marked_display_snapshot, Buffer, DisplayMap, ExcerptRange,
400 InlayId, MultiBuffer,
401 };
402 use settings::SettingsStore;
403 use util::post_inc;
404
405 #[gpui::test]
406 fn test_previous_word_start(cx: &mut gpui::AppContext) {
407 init_test(cx);
408
409 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
410 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
411 assert_eq!(
412 previous_word_start(&snapshot, display_points[1]),
413 display_points[0]
414 );
415 }
416
417 assert("\nˇ ˇlorem", cx);
418 assert("ˇ\nˇ lorem", cx);
419 assert(" ˇloremˇ", cx);
420 assert("ˇ ˇlorem", cx);
421 assert(" ˇlorˇem", cx);
422 assert("\nlorem\nˇ ˇipsum", cx);
423 assert("\n\nˇ\nˇ", cx);
424 assert(" ˇlorem ˇipsum", cx);
425 assert("loremˇ-ˇipsum", cx);
426 assert("loremˇ-#$@ˇipsum", cx);
427 assert("ˇlorem_ˇipsum", cx);
428 assert(" ˇdefγˇ", cx);
429 assert(" ˇbcΔˇ", cx);
430 assert(" abˇ——ˇcd", cx);
431 }
432
433 #[gpui::test]
434 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
435 init_test(cx);
436
437 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
438 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
439 assert_eq!(
440 previous_subword_start(&snapshot, display_points[1]),
441 display_points[0]
442 );
443 }
444
445 // Subword boundaries are respected
446 assert("lorem_ˇipˇsum", cx);
447 assert("lorem_ˇipsumˇ", cx);
448 assert("ˇlorem_ˇipsum", cx);
449 assert("lorem_ˇipsum_ˇdolor", cx);
450 assert("loremˇIpˇsum", cx);
451 assert("loremˇIpsumˇ", cx);
452
453 // Word boundaries are still respected
454 assert("\nˇ ˇlorem", cx);
455 assert(" ˇloremˇ", cx);
456 assert(" ˇlorˇem", cx);
457 assert("\nlorem\nˇ ˇipsum", cx);
458 assert("\n\nˇ\nˇ", cx);
459 assert(" ˇlorem ˇipsum", cx);
460 assert("loremˇ-ˇipsum", cx);
461 assert("loremˇ-#$@ˇipsum", cx);
462 assert(" ˇdefγˇ", cx);
463 assert(" bcˇΔˇ", cx);
464 assert(" ˇbcδˇ", cx);
465 assert(" abˇ——ˇcd", cx);
466 }
467
468 #[gpui::test]
469 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
470 init_test(cx);
471
472 fn assert(
473 marked_text: &str,
474 cx: &mut gpui::AppContext,
475 is_boundary: impl FnMut(char, char) -> bool,
476 ) {
477 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
478 assert_eq!(
479 find_preceding_boundary(
480 &snapshot,
481 display_points[1],
482 FindRange::MultiLine,
483 is_boundary
484 ),
485 display_points[0]
486 );
487 }
488
489 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
490 left == 'c' && right == 'd'
491 });
492 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
493 left == '\n' && right == 'g'
494 });
495 let mut line_count = 0;
496 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
497 if left == '\n' {
498 line_count += 1;
499 line_count == 2
500 } else {
501 false
502 }
503 });
504 }
505
506 #[gpui::test]
507 fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::AppContext) {
508 init_test(cx);
509
510 let input_text = "abcdefghijklmnopqrstuvwxys";
511 let family_id = cx
512 .font_cache()
513 .load_family(&["Helvetica"], &Default::default())
514 .unwrap();
515 let font_id = cx
516 .font_cache()
517 .select_font(family_id, &Default::default())
518 .unwrap();
519 let font_size = 14.0;
520 let buffer = MultiBuffer::build_simple(input_text, cx);
521 let buffer_snapshot = buffer.read(cx).snapshot(cx);
522 let display_map =
523 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
524
525 // add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
526 let mut id = 0;
527 let inlays = (0..buffer_snapshot.len())
528 .map(|offset| {
529 [
530 Inlay {
531 id: InlayId::Suggestion(post_inc(&mut id)),
532 position: buffer_snapshot.anchor_at(offset, Bias::Left),
533 text: format!("test").into(),
534 },
535 Inlay {
536 id: InlayId::Suggestion(post_inc(&mut id)),
537 position: buffer_snapshot.anchor_at(offset, Bias::Right),
538 text: format!("test").into(),
539 },
540 Inlay {
541 id: InlayId::Hint(post_inc(&mut id)),
542 position: buffer_snapshot.anchor_at(offset, Bias::Left),
543 text: format!("test").into(),
544 },
545 Inlay {
546 id: InlayId::Hint(post_inc(&mut id)),
547 position: buffer_snapshot.anchor_at(offset, Bias::Right),
548 text: format!("test").into(),
549 },
550 ]
551 })
552 .flatten()
553 .collect();
554 let snapshot = display_map.update(cx, |map, cx| {
555 map.splice_inlays(Vec::new(), inlays, cx);
556 map.snapshot(cx)
557 });
558
559 assert_eq!(
560 find_preceding_boundary(
561 &snapshot,
562 buffer_snapshot.len().to_display_point(&snapshot),
563 FindRange::MultiLine,
564 |left, _| left == 'e',
565 ),
566 snapshot
567 .buffer_snapshot
568 .offset_to_point(5)
569 .to_display_point(&snapshot),
570 "Should not stop at inlays when looking for boundaries"
571 );
572 }
573
574 #[gpui::test]
575 fn test_next_word_end(cx: &mut gpui::AppContext) {
576 init_test(cx);
577
578 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
579 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
580 assert_eq!(
581 next_word_end(&snapshot, display_points[0]),
582 display_points[1]
583 );
584 }
585
586 assert("\nˇ loremˇ", cx);
587 assert(" ˇloremˇ", cx);
588 assert(" lorˇemˇ", cx);
589 assert(" loremˇ ˇ\nipsum\n", cx);
590 assert("\nˇ\nˇ\n\n", cx);
591 assert("loremˇ ipsumˇ ", cx);
592 assert("loremˇ-ˇipsum", cx);
593 assert("loremˇ#$@-ˇipsum", cx);
594 assert("loremˇ_ipsumˇ", cx);
595 assert(" ˇbcΔˇ", cx);
596 assert(" abˇ——ˇcd", cx);
597 }
598
599 #[gpui::test]
600 fn test_next_subword_end(cx: &mut gpui::AppContext) {
601 init_test(cx);
602
603 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
604 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
605 assert_eq!(
606 next_subword_end(&snapshot, display_points[0]),
607 display_points[1]
608 );
609 }
610
611 // Subword boundaries are respected
612 assert("loˇremˇ_ipsum", cx);
613 assert("ˇloremˇ_ipsum", cx);
614 assert("loremˇ_ipsumˇ", cx);
615 assert("loremˇ_ipsumˇ_dolor", cx);
616 assert("loˇremˇIpsum", cx);
617 assert("loremˇIpsumˇDolor", cx);
618
619 // Word boundaries are still respected
620 assert("\nˇ loremˇ", cx);
621 assert(" ˇloremˇ", cx);
622 assert(" lorˇemˇ", cx);
623 assert(" loremˇ ˇ\nipsum\n", cx);
624 assert("\nˇ\nˇ\n\n", cx);
625 assert("loremˇ ipsumˇ ", cx);
626 assert("loremˇ-ˇipsum", cx);
627 assert("loremˇ#$@-ˇipsum", cx);
628 assert("loremˇ_ipsumˇ", cx);
629 assert(" ˇbcˇΔ", cx);
630 assert(" abˇ——ˇcd", cx);
631 }
632
633 #[gpui::test]
634 fn test_find_boundary(cx: &mut gpui::AppContext) {
635 init_test(cx);
636
637 fn assert(
638 marked_text: &str,
639 cx: &mut gpui::AppContext,
640 is_boundary: impl FnMut(char, char) -> bool,
641 ) {
642 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
643 assert_eq!(
644 find_boundary(
645 &snapshot,
646 display_points[0],
647 FindRange::MultiLine,
648 is_boundary
649 ),
650 display_points[1]
651 );
652 }
653
654 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
655 left == 'j' && right == 'k'
656 });
657 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
658 left == '\n' && right == 'i'
659 });
660 let mut line_count = 0;
661 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
662 if left == '\n' {
663 line_count += 1;
664 line_count == 2
665 } else {
666 false
667 }
668 });
669 }
670
671 #[gpui::test]
672 fn test_surrounding_word(cx: &mut gpui::AppContext) {
673 init_test(cx);
674
675 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
676 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
677 assert_eq!(
678 surrounding_word(&snapshot, display_points[1]),
679 display_points[0]..display_points[2]
680 );
681 }
682
683 assert("ˇˇloremˇ ipsum", cx);
684 assert("ˇloˇremˇ ipsum", cx);
685 assert("ˇloremˇˇ ipsum", cx);
686 assert("loremˇ ˇ ˇipsum", cx);
687 assert("lorem\nˇˇˇ\nipsum", cx);
688 assert("lorem\nˇˇipsumˇ", cx);
689 assert("lorem,ˇˇ ˇipsum", cx);
690 assert("ˇloremˇˇ, ipsum", cx);
691 }
692
693 #[gpui::test]
694 fn test_move_up_and_down_with_excerpts(cx: &mut gpui::AppContext) {
695 init_test(cx);
696
697 let family_id = cx
698 .font_cache()
699 .load_family(&["Helvetica"], &Default::default())
700 .unwrap();
701 let font_id = cx
702 .font_cache()
703 .select_font(family_id, &Default::default())
704 .unwrap();
705
706 let buffer =
707 cx.add_model(|cx| Buffer::new(0, cx.model_id() as u64, "abc\ndefg\nhijkl\nmn"));
708 let multibuffer = cx.add_model(|cx| {
709 let mut multibuffer = MultiBuffer::new(0);
710 multibuffer.push_excerpts(
711 buffer.clone(),
712 [
713 ExcerptRange {
714 context: Point::new(0, 0)..Point::new(1, 4),
715 primary: None,
716 },
717 ExcerptRange {
718 context: Point::new(2, 0)..Point::new(3, 2),
719 primary: None,
720 },
721 ],
722 cx,
723 );
724 multibuffer
725 });
726 let display_map =
727 cx.add_model(|cx| DisplayMap::new(multibuffer, font_id, 14.0, None, 2, 2, cx));
728 let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
729
730 assert_eq!(snapshot.text(), "\n\nabc\ndefg\n\n\nhijkl\nmn");
731
732 // Can't move up into the first excerpt's header
733 assert_eq!(
734 up(
735 &snapshot,
736 DisplayPoint::new(2, 2),
737 SelectionGoal::Column(2),
738 false
739 ),
740 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
741 );
742 assert_eq!(
743 up(
744 &snapshot,
745 DisplayPoint::new(2, 0),
746 SelectionGoal::None,
747 false
748 ),
749 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
750 );
751
752 // Move up and down within first excerpt
753 assert_eq!(
754 up(
755 &snapshot,
756 DisplayPoint::new(3, 4),
757 SelectionGoal::Column(4),
758 false
759 ),
760 (DisplayPoint::new(2, 3), SelectionGoal::Column(4)),
761 );
762 assert_eq!(
763 down(
764 &snapshot,
765 DisplayPoint::new(2, 3),
766 SelectionGoal::Column(4),
767 false
768 ),
769 (DisplayPoint::new(3, 4), SelectionGoal::Column(4)),
770 );
771
772 // Move up and down across second excerpt's header
773 assert_eq!(
774 up(
775 &snapshot,
776 DisplayPoint::new(6, 5),
777 SelectionGoal::Column(5),
778 false
779 ),
780 (DisplayPoint::new(3, 4), SelectionGoal::Column(5)),
781 );
782 assert_eq!(
783 down(
784 &snapshot,
785 DisplayPoint::new(3, 4),
786 SelectionGoal::Column(5),
787 false
788 ),
789 (DisplayPoint::new(6, 5), SelectionGoal::Column(5)),
790 );
791
792 // Can't move down off the end
793 assert_eq!(
794 down(
795 &snapshot,
796 DisplayPoint::new(7, 0),
797 SelectionGoal::Column(0),
798 false
799 ),
800 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
801 );
802 assert_eq!(
803 down(
804 &snapshot,
805 DisplayPoint::new(7, 2),
806 SelectionGoal::Column(2),
807 false
808 ),
809 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
810 );
811 }
812
813 fn init_test(cx: &mut gpui::AppContext) {
814 cx.set_global(SettingsStore::test(cx));
815 theme::init((), cx);
816 language::init(cx);
817 crate::init(cx);
818 }
819}