1use super::{Bias, DisplayPoint, DisplaySnapshot, SelectionGoal, ToDisplayPoint};
2use crate::{char_kind, CharKind, ToPoint};
3use language::Point;
4use std::ops::Range;
5
6pub fn left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
7 if point.column() > 0 {
8 *point.column_mut() -= 1;
9 } else if point.row() > 0 {
10 *point.row_mut() -= 1;
11 *point.column_mut() = map.line_len(point.row());
12 }
13 map.clip_point(point, Bias::Left)
14}
15
16pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
17 let max_column = map.line_len(point.row());
18 if point.column() < max_column {
19 *point.column_mut() += 1;
20 } else if point.row() < map.max_point().row() {
21 *point.row_mut() += 1;
22 *point.column_mut() = 0;
23 }
24 map.clip_point(point, Bias::Right)
25}
26
27pub fn up(
28 map: &DisplaySnapshot,
29 start: DisplayPoint,
30 goal: SelectionGoal,
31 preserve_column_at_start: bool,
32) -> (DisplayPoint, SelectionGoal) {
33 up_by_rows(map, start, 1, goal, preserve_column_at_start)
34}
35
36pub fn down(
37 map: &DisplaySnapshot,
38 start: DisplayPoint,
39 goal: SelectionGoal,
40 preserve_column_at_end: bool,
41) -> (DisplayPoint, SelectionGoal) {
42 down_by_rows(map, start, 1, goal, preserve_column_at_end)
43}
44
45pub fn up_by_rows(
46 map: &DisplaySnapshot,
47 start: DisplayPoint,
48 row_count: u32,
49 goal: SelectionGoal,
50 preserve_column_at_start: bool,
51) -> (DisplayPoint, SelectionGoal) {
52 let mut goal_column = if let SelectionGoal::Column(column) = goal {
53 column
54 } else {
55 map.column_to_chars(start.row(), start.column())
56 };
57
58 let prev_row = start.row().saturating_sub(row_count);
59 let mut point = map.clip_point(
60 DisplayPoint::new(prev_row, map.line_len(prev_row)),
61 Bias::Left,
62 );
63 if point.row() < start.row() {
64 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
65 } else if preserve_column_at_start {
66 return (start, goal);
67 } else {
68 point = DisplayPoint::new(0, 0);
69 goal_column = 0;
70 }
71
72 let mut clipped_point = map.clip_point(point, Bias::Left);
73 if clipped_point.row() < point.row() {
74 clipped_point = map.clip_point(point, Bias::Right);
75 }
76 (clipped_point, SelectionGoal::Column(goal_column))
77}
78
79pub fn down_by_rows(
80 map: &DisplaySnapshot,
81 start: DisplayPoint,
82 row_count: u32,
83 goal: SelectionGoal,
84 preserve_column_at_end: bool,
85) -> (DisplayPoint, SelectionGoal) {
86 let mut goal_column = if let SelectionGoal::Column(column) = goal {
87 column
88 } else {
89 map.column_to_chars(start.row(), start.column())
90 };
91
92 let new_row = start.row() + row_count;
93 let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
94 if point.row() > start.row() {
95 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
96 } else if preserve_column_at_end {
97 return (start, goal);
98 } else {
99 point = map.max_point();
100 goal_column = map.column_to_chars(point.row(), point.column())
101 }
102
103 let mut clipped_point = map.clip_point(point, Bias::Right);
104 if clipped_point.row() > point.row() {
105 clipped_point = map.clip_point(point, Bias::Left);
106 }
107 (clipped_point, SelectionGoal::Column(goal_column))
108}
109
110pub fn line_beginning(
111 map: &DisplaySnapshot,
112 display_point: DisplayPoint,
113 stop_at_soft_boundaries: bool,
114) -> DisplayPoint {
115 let point = display_point.to_point(map);
116 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
117 let line_start = map.prev_line_boundary(point).1;
118
119 if stop_at_soft_boundaries && display_point != soft_line_start {
120 soft_line_start
121 } else {
122 line_start
123 }
124}
125
126pub fn indented_line_beginning(
127 map: &DisplaySnapshot,
128 display_point: DisplayPoint,
129 stop_at_soft_boundaries: bool,
130) -> DisplayPoint {
131 let point = display_point.to_point(map);
132 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
133 let indent_start = Point::new(
134 point.row,
135 map.buffer_snapshot.indent_size_for_line(point.row).len,
136 )
137 .to_display_point(map);
138 let line_start = map.prev_line_boundary(point).1;
139
140 if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
141 {
142 soft_line_start
143 } else if stop_at_soft_boundaries && display_point != indent_start {
144 indent_start
145 } else {
146 line_start
147 }
148}
149
150pub fn line_end(
151 map: &DisplaySnapshot,
152 display_point: DisplayPoint,
153 stop_at_soft_boundaries: bool,
154) -> DisplayPoint {
155 let soft_line_end = map.clip_point(
156 DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
157 Bias::Left,
158 );
159 if stop_at_soft_boundaries && display_point != soft_line_end {
160 soft_line_end
161 } else {
162 map.next_line_boundary(display_point.to_point(map)).1
163 }
164}
165
166pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
167 find_preceding_boundary(map, point, |left, right| {
168 (char_kind(left) != char_kind(right) && !right.is_whitespace()) || left == '\n'
169 })
170}
171
172pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
173 find_preceding_boundary(map, point, |left, right| {
174 let is_word_start = char_kind(left) != char_kind(right) && !right.is_whitespace();
175 let is_subword_start =
176 left == '_' && right != '_' || left.is_lowercase() && right.is_uppercase();
177 is_word_start || is_subword_start || left == '\n'
178 })
179}
180
181pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
182 find_boundary(map, point, |left, right| {
183 (char_kind(left) != char_kind(right) && !left.is_whitespace()) || right == '\n'
184 })
185}
186
187pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
188 find_boundary(map, point, |left, right| {
189 let is_word_end = (char_kind(left) != char_kind(right)) && !left.is_whitespace();
190 let is_subword_end =
191 left != '_' && right == '_' || left.is_lowercase() && right.is_uppercase();
192 is_word_end || is_subword_end || right == '\n'
193 })
194}
195
196pub fn start_of_paragraph(map: &DisplaySnapshot, display_point: DisplayPoint) -> DisplayPoint {
197 let point = display_point.to_point(map);
198 if point.row == 0 {
199 return map.max_point();
200 }
201
202 let mut found_non_blank_line = false;
203 for row in (0..point.row + 1).rev() {
204 let blank = map.buffer_snapshot.is_line_blank(row);
205 if found_non_blank_line && blank {
206 return Point::new(row, 0).to_display_point(map);
207 }
208
209 found_non_blank_line |= !blank;
210 }
211
212 DisplayPoint::zero()
213}
214
215pub fn end_of_paragraph(map: &DisplaySnapshot, display_point: DisplayPoint) -> DisplayPoint {
216 let point = display_point.to_point(map);
217 if point.row == map.max_buffer_row() {
218 return DisplayPoint::zero();
219 }
220
221 let mut found_non_blank_line = false;
222 for row in point.row..map.max_buffer_row() + 1 {
223 let blank = map.buffer_snapshot.is_line_blank(row);
224 if found_non_blank_line && blank {
225 return Point::new(row, 0).to_display_point(map);
226 }
227
228 found_non_blank_line |= !blank;
229 }
230
231 map.max_point()
232}
233
234/// Scans for a boundary preceding the given start point `from` until a boundary is found, indicated by the
235/// given predicate returning true. The predicate is called with the character to the left and right
236/// of the candidate boundary location, and will be called with `\n` characters indicating the start
237/// or end of a line.
238pub fn find_preceding_boundary(
239 map: &DisplaySnapshot,
240 from: DisplayPoint,
241 mut is_boundary: impl FnMut(char, char) -> bool,
242) -> DisplayPoint {
243 let mut start_column = 0;
244 let mut soft_wrap_row = from.row() + 1;
245
246 let mut prev = None;
247 for (ch, point) in map.reverse_chars_at(from) {
248 // Recompute soft_wrap_indent if the row has changed
249 if point.row() != soft_wrap_row {
250 soft_wrap_row = point.row();
251
252 if point.row() == 0 {
253 start_column = 0;
254 } else if let Some(indent) = map.soft_wrap_indent(point.row() - 1) {
255 start_column = indent;
256 }
257 }
258
259 // If the current point is in the soft_wrap, skip comparing it
260 if point.column() < start_column {
261 continue;
262 }
263
264 if let Some((prev_ch, prev_point)) = prev {
265 if is_boundary(ch, prev_ch) {
266 return map.clip_point(prev_point, Bias::Left);
267 }
268 }
269
270 prev = Some((ch, point));
271 }
272 map.clip_point(DisplayPoint::zero(), Bias::Left)
273}
274
275/// Scans for a boundary preceding the given start point `from` until a boundary is found, indicated by the
276/// given predicate returning true. The predicate is called with the character to the left and right
277/// of the candidate boundary location, and will be called with `\n` characters indicating the start
278/// or end of a line. If no boundary is found, the start of the line is returned.
279pub fn find_preceding_boundary_in_line(
280 map: &DisplaySnapshot,
281 from: DisplayPoint,
282 mut is_boundary: impl FnMut(char, char) -> bool,
283) -> DisplayPoint {
284 let mut start_column = 0;
285 if from.row() > 0 {
286 if let Some(indent) = map.soft_wrap_indent(from.row() - 1) {
287 start_column = indent;
288 }
289 }
290
291 let mut prev = None;
292 for (ch, point) in map.reverse_chars_at(from) {
293 if let Some((prev_ch, prev_point)) = prev {
294 if is_boundary(ch, prev_ch) {
295 return map.clip_point(prev_point, Bias::Left);
296 }
297 }
298
299 if ch == '\n' || point.column() < start_column {
300 break;
301 }
302
303 prev = Some((ch, point));
304 }
305
306 map.clip_point(prev.map(|(_, point)| point).unwrap_or(from), Bias::Left)
307}
308
309/// Scans for a boundary following the given start point until a boundary is found, indicated by the
310/// given predicate returning true. The predicate is called with the character to the left and right
311/// of the candidate boundary location, and will be called with `\n` characters indicating the start
312/// or end of a line.
313pub fn find_boundary(
314 map: &DisplaySnapshot,
315 from: DisplayPoint,
316 mut is_boundary: impl FnMut(char, char) -> bool,
317) -> DisplayPoint {
318 let mut prev_ch = None;
319 for (ch, point) in map.chars_at(from) {
320 if let Some(prev_ch) = prev_ch {
321 if is_boundary(prev_ch, ch) {
322 return map.clip_point(point, Bias::Right);
323 }
324 }
325
326 prev_ch = Some(ch);
327 }
328 map.clip_point(map.max_point(), Bias::Right)
329}
330
331/// Scans for a boundary following the given start point until a boundary is found, indicated by the
332/// given predicate returning true. The predicate is called with the character to the left and right
333/// of the candidate boundary location, and will be called with `\n` characters indicating the start
334/// or end of a line. If no boundary is found, the end of the line is returned
335pub fn find_boundary_in_line(
336 map: &DisplaySnapshot,
337 from: DisplayPoint,
338 mut is_boundary: impl FnMut(char, char) -> bool,
339) -> DisplayPoint {
340 let mut prev = None;
341 for (ch, point) in map.chars_at(from) {
342 if let Some((prev_ch, _)) = prev {
343 if is_boundary(prev_ch, ch) {
344 return map.clip_point(point, Bias::Right);
345 }
346 }
347
348 prev = Some((ch, point));
349
350 if ch == '\n' {
351 break;
352 }
353 }
354
355 // Return the last position checked so that we give a point right before the newline or eof.
356 map.clip_point(prev.map(|(_, point)| point).unwrap_or(from), Bias::Right)
357}
358
359pub fn is_inside_word(map: &DisplaySnapshot, point: DisplayPoint) -> bool {
360 let ix = map.clip_point(point, Bias::Left).to_offset(map, Bias::Left);
361 let text = &map.buffer_snapshot;
362 let next_char_kind = text.chars_at(ix).next().map(char_kind);
363 let prev_char_kind = text.reversed_chars_at(ix).next().map(char_kind);
364 prev_char_kind.zip(next_char_kind) == Some((CharKind::Word, CharKind::Word))
365}
366
367pub fn surrounding_word(map: &DisplaySnapshot, position: DisplayPoint) -> Range<DisplayPoint> {
368 let position = map
369 .clip_point(position, Bias::Left)
370 .to_offset(map, Bias::Left);
371 let (range, _) = map.buffer_snapshot.surrounding_word(position);
372 let start = range
373 .start
374 .to_point(&map.buffer_snapshot)
375 .to_display_point(map);
376 let end = range
377 .end
378 .to_point(&map.buffer_snapshot)
379 .to_display_point(map);
380 start..end
381}
382
383pub fn split_display_range_by_lines(
384 map: &DisplaySnapshot,
385 range: Range<DisplayPoint>,
386) -> Vec<Range<DisplayPoint>> {
387 let mut result = Vec::new();
388
389 let mut start = range.start;
390 // Loop over all the covered rows until the one containing the range end
391 for row in range.start.row()..range.end.row() {
392 let row_end_column = map.line_len(row);
393 let end = map.clip_point(DisplayPoint::new(row, row_end_column), Bias::Left);
394 if start != end {
395 result.push(start..end);
396 }
397 start = map.clip_point(DisplayPoint::new(row + 1, 0), Bias::Left);
398 }
399
400 // Add the final range from the start of the last end to the original range end.
401 result.push(start..range.end);
402
403 result
404}
405
406#[cfg(test)]
407mod tests {
408 use super::*;
409 use crate::{
410 display_map::Inlay, test::marked_display_snapshot, Buffer, DisplayMap, ExcerptRange,
411 InlayId, MultiBuffer,
412 };
413 use settings::SettingsStore;
414 use util::post_inc;
415
416 #[gpui::test]
417 fn test_previous_word_start(cx: &mut gpui::AppContext) {
418 init_test(cx);
419
420 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
421 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
422 assert_eq!(
423 previous_word_start(&snapshot, display_points[1]),
424 display_points[0]
425 );
426 }
427
428 assert("\nˇ ˇlorem", cx);
429 assert("ˇ\nˇ lorem", cx);
430 assert(" ˇloremˇ", cx);
431 assert("ˇ ˇlorem", cx);
432 assert(" ˇlorˇem", cx);
433 assert("\nlorem\nˇ ˇipsum", cx);
434 assert("\n\nˇ\nˇ", cx);
435 assert(" ˇlorem ˇipsum", cx);
436 assert("loremˇ-ˇipsum", cx);
437 assert("loremˇ-#$@ˇipsum", cx);
438 assert("ˇlorem_ˇipsum", cx);
439 assert(" ˇdefγˇ", cx);
440 assert(" ˇbcΔˇ", cx);
441 assert(" abˇ——ˇcd", cx);
442 }
443
444 #[gpui::test]
445 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
446 init_test(cx);
447
448 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
449 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
450 assert_eq!(
451 previous_subword_start(&snapshot, display_points[1]),
452 display_points[0]
453 );
454 }
455
456 // Subword boundaries are respected
457 assert("lorem_ˇipˇsum", cx);
458 assert("lorem_ˇipsumˇ", cx);
459 assert("ˇlorem_ˇipsum", cx);
460 assert("lorem_ˇipsum_ˇdolor", cx);
461 assert("loremˇIpˇsum", cx);
462 assert("loremˇIpsumˇ", cx);
463
464 // Word boundaries are still respected
465 assert("\nˇ ˇlorem", cx);
466 assert(" ˇloremˇ", cx);
467 assert(" ˇlorˇem", cx);
468 assert("\nlorem\nˇ ˇipsum", cx);
469 assert("\n\nˇ\nˇ", cx);
470 assert(" ˇlorem ˇipsum", cx);
471 assert("loremˇ-ˇipsum", cx);
472 assert("loremˇ-#$@ˇipsum", cx);
473 assert(" ˇdefγˇ", cx);
474 assert(" bcˇΔˇ", cx);
475 assert(" ˇbcδˇ", cx);
476 assert(" abˇ——ˇcd", cx);
477 }
478
479 #[gpui::test]
480 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
481 init_test(cx);
482
483 fn assert(
484 marked_text: &str,
485 cx: &mut gpui::AppContext,
486 is_boundary: impl FnMut(char, char) -> bool,
487 ) {
488 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
489 assert_eq!(
490 find_preceding_boundary(&snapshot, display_points[1], is_boundary),
491 display_points[0]
492 );
493 }
494
495 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
496 left == 'c' && right == 'd'
497 });
498 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
499 left == '\n' && right == 'g'
500 });
501 let mut line_count = 0;
502 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
503 if left == '\n' {
504 line_count += 1;
505 line_count == 2
506 } else {
507 false
508 }
509 });
510 }
511
512 #[gpui::test]
513 fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::AppContext) {
514 init_test(cx);
515
516 let input_text = "abcdefghijklmnopqrstuvwxys";
517 let family_id = cx
518 .font_cache()
519 .load_family(&["Helvetica"], &Default::default())
520 .unwrap();
521 let font_id = cx
522 .font_cache()
523 .select_font(family_id, &Default::default())
524 .unwrap();
525 let font_size = 14.0;
526 let buffer = MultiBuffer::build_simple(input_text, cx);
527 let buffer_snapshot = buffer.read(cx).snapshot(cx);
528 let display_map =
529 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
530
531 // add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
532 let mut id = 0;
533 let inlays = (0..buffer_snapshot.len())
534 .map(|offset| {
535 [
536 Inlay {
537 id: InlayId::Suggestion(post_inc(&mut id)),
538 position: buffer_snapshot.anchor_at(offset, Bias::Left),
539 text: format!("test").into(),
540 },
541 Inlay {
542 id: InlayId::Suggestion(post_inc(&mut id)),
543 position: buffer_snapshot.anchor_at(offset, Bias::Right),
544 text: format!("test").into(),
545 },
546 Inlay {
547 id: InlayId::Hint(post_inc(&mut id)),
548 position: buffer_snapshot.anchor_at(offset, Bias::Left),
549 text: format!("test").into(),
550 },
551 Inlay {
552 id: InlayId::Hint(post_inc(&mut id)),
553 position: buffer_snapshot.anchor_at(offset, Bias::Right),
554 text: format!("test").into(),
555 },
556 ]
557 })
558 .flatten()
559 .collect();
560 let snapshot = display_map.update(cx, |map, cx| {
561 map.splice_inlays(Vec::new(), inlays, cx);
562 map.snapshot(cx)
563 });
564
565 assert_eq!(
566 find_preceding_boundary(
567 &snapshot,
568 buffer_snapshot.len().to_display_point(&snapshot),
569 |left, _| left == 'a',
570 ),
571 0.to_display_point(&snapshot),
572 "Should not stop at inlays when looking for boundaries"
573 );
574
575 assert_eq!(
576 find_preceding_boundary_in_line(
577 &snapshot,
578 buffer_snapshot.len().to_display_point(&snapshot),
579 |left, _| left == 'a',
580 ),
581 0.to_display_point(&snapshot),
582 "Should not stop at inlays when looking for boundaries in line"
583 );
584 }
585
586 #[gpui::test]
587 fn test_next_word_end(cx: &mut gpui::AppContext) {
588 init_test(cx);
589
590 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
591 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
592 assert_eq!(
593 next_word_end(&snapshot, display_points[0]),
594 display_points[1]
595 );
596 }
597
598 assert("\nˇ loremˇ", cx);
599 assert(" ˇloremˇ", cx);
600 assert(" lorˇemˇ", cx);
601 assert(" loremˇ ˇ\nipsum\n", cx);
602 assert("\nˇ\nˇ\n\n", cx);
603 assert("loremˇ ipsumˇ ", cx);
604 assert("loremˇ-ˇipsum", cx);
605 assert("loremˇ#$@-ˇipsum", cx);
606 assert("loremˇ_ipsumˇ", cx);
607 assert(" ˇbcΔˇ", cx);
608 assert(" abˇ——ˇcd", cx);
609 }
610
611 #[gpui::test]
612 fn test_next_subword_end(cx: &mut gpui::AppContext) {
613 init_test(cx);
614
615 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
616 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
617 assert_eq!(
618 next_subword_end(&snapshot, display_points[0]),
619 display_points[1]
620 );
621 }
622
623 // Subword boundaries are respected
624 assert("loˇremˇ_ipsum", cx);
625 assert("ˇloremˇ_ipsum", cx);
626 assert("loremˇ_ipsumˇ", cx);
627 assert("loremˇ_ipsumˇ_dolor", cx);
628 assert("loˇremˇIpsum", cx);
629 assert("loremˇIpsumˇDolor", cx);
630
631 // Word boundaries are still respected
632 assert("\nˇ loremˇ", cx);
633 assert(" ˇloremˇ", cx);
634 assert(" lorˇemˇ", cx);
635 assert(" loremˇ ˇ\nipsum\n", cx);
636 assert("\nˇ\nˇ\n\n", cx);
637 assert("loremˇ ipsumˇ ", cx);
638 assert("loremˇ-ˇipsum", cx);
639 assert("loremˇ#$@-ˇipsum", cx);
640 assert("loremˇ_ipsumˇ", cx);
641 assert(" ˇbcˇΔ", cx);
642 assert(" abˇ——ˇcd", cx);
643 }
644
645 #[gpui::test]
646 fn test_find_boundary(cx: &mut gpui::AppContext) {
647 init_test(cx);
648
649 fn assert(
650 marked_text: &str,
651 cx: &mut gpui::AppContext,
652 is_boundary: impl FnMut(char, char) -> bool,
653 ) {
654 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
655 assert_eq!(
656 find_boundary(&snapshot, display_points[0], is_boundary),
657 display_points[1]
658 );
659 }
660
661 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
662 left == 'j' && right == 'k'
663 });
664 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
665 left == '\n' && right == 'i'
666 });
667 let mut line_count = 0;
668 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
669 if left == '\n' {
670 line_count += 1;
671 line_count == 2
672 } else {
673 false
674 }
675 });
676 }
677
678 #[gpui::test]
679 fn test_surrounding_word(cx: &mut gpui::AppContext) {
680 init_test(cx);
681
682 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
683 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
684 assert_eq!(
685 surrounding_word(&snapshot, display_points[1]),
686 display_points[0]..display_points[2]
687 );
688 }
689
690 assert("ˇˇloremˇ ipsum", cx);
691 assert("ˇloˇremˇ ipsum", cx);
692 assert("ˇloremˇˇ ipsum", cx);
693 assert("loremˇ ˇ ˇipsum", cx);
694 assert("lorem\nˇˇˇ\nipsum", cx);
695 assert("lorem\nˇˇipsumˇ", cx);
696 assert("lorem,ˇˇ ˇipsum", cx);
697 assert("ˇloremˇˇ, ipsum", cx);
698 }
699
700 #[gpui::test]
701 fn test_move_up_and_down_with_excerpts(cx: &mut gpui::AppContext) {
702 init_test(cx);
703
704 let family_id = cx
705 .font_cache()
706 .load_family(&["Helvetica"], &Default::default())
707 .unwrap();
708 let font_id = cx
709 .font_cache()
710 .select_font(family_id, &Default::default())
711 .unwrap();
712
713 let buffer = cx.add_model(|cx| Buffer::new(0, "abc\ndefg\nhijkl\nmn", cx));
714 let multibuffer = cx.add_model(|cx| {
715 let mut multibuffer = MultiBuffer::new(0);
716 multibuffer.push_excerpts(
717 buffer.clone(),
718 [
719 ExcerptRange {
720 context: Point::new(0, 0)..Point::new(1, 4),
721 primary: None,
722 },
723 ExcerptRange {
724 context: Point::new(2, 0)..Point::new(3, 2),
725 primary: None,
726 },
727 ],
728 cx,
729 );
730 multibuffer
731 });
732 let display_map =
733 cx.add_model(|cx| DisplayMap::new(multibuffer, font_id, 14.0, None, 2, 2, cx));
734 let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
735
736 assert_eq!(snapshot.text(), "\n\nabc\ndefg\n\n\nhijkl\nmn");
737
738 // Can't move up into the first excerpt's header
739 assert_eq!(
740 up(
741 &snapshot,
742 DisplayPoint::new(2, 2),
743 SelectionGoal::Column(2),
744 false
745 ),
746 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
747 );
748 assert_eq!(
749 up(
750 &snapshot,
751 DisplayPoint::new(2, 0),
752 SelectionGoal::None,
753 false
754 ),
755 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
756 );
757
758 // Move up and down within first excerpt
759 assert_eq!(
760 up(
761 &snapshot,
762 DisplayPoint::new(3, 4),
763 SelectionGoal::Column(4),
764 false
765 ),
766 (DisplayPoint::new(2, 3), SelectionGoal::Column(4)),
767 );
768 assert_eq!(
769 down(
770 &snapshot,
771 DisplayPoint::new(2, 3),
772 SelectionGoal::Column(4),
773 false
774 ),
775 (DisplayPoint::new(3, 4), SelectionGoal::Column(4)),
776 );
777
778 // Move up and down across second excerpt's header
779 assert_eq!(
780 up(
781 &snapshot,
782 DisplayPoint::new(6, 5),
783 SelectionGoal::Column(5),
784 false
785 ),
786 (DisplayPoint::new(3, 4), SelectionGoal::Column(5)),
787 );
788 assert_eq!(
789 down(
790 &snapshot,
791 DisplayPoint::new(3, 4),
792 SelectionGoal::Column(5),
793 false
794 ),
795 (DisplayPoint::new(6, 5), SelectionGoal::Column(5)),
796 );
797
798 // Can't move down off the end
799 assert_eq!(
800 down(
801 &snapshot,
802 DisplayPoint::new(7, 0),
803 SelectionGoal::Column(0),
804 false
805 ),
806 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
807 );
808 assert_eq!(
809 down(
810 &snapshot,
811 DisplayPoint::new(7, 2),
812 SelectionGoal::Column(2),
813 false
814 ),
815 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
816 );
817 }
818
819 fn init_test(cx: &mut gpui::AppContext) {
820 cx.set_global(SettingsStore::test(cx));
821 theme::init((), cx);
822 language::init(cx);
823 crate::init(cx);
824 }
825}