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 prev_point;
267 }
268 }
269
270 prev = Some((ch, point));
271 }
272 DisplayPoint::zero()
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 prev_point;
296 }
297 }
298
299 if ch == '\n' || point.column() < start_column {
300 break;
301 }
302
303 prev = Some((ch, point));
304 }
305
306 prev.map(|(_, point)| point).unwrap_or(from)
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::{test::marked_display_snapshot, Buffer, DisplayMap, ExcerptRange, MultiBuffer};
410 use settings::SettingsStore;
411
412 #[gpui::test]
413 fn test_previous_word_start(cx: &mut gpui::AppContext) {
414 init_test(cx);
415
416 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
417 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
418 assert_eq!(
419 previous_word_start(&snapshot, display_points[1]),
420 display_points[0]
421 );
422 }
423
424 assert("\nˇ ˇlorem", cx);
425 assert("ˇ\nˇ lorem", cx);
426 assert(" ˇloremˇ", cx);
427 assert("ˇ ˇlorem", cx);
428 assert(" ˇlorˇem", cx);
429 assert("\nlorem\nˇ ˇipsum", cx);
430 assert("\n\nˇ\nˇ", cx);
431 assert(" ˇlorem ˇipsum", cx);
432 assert("loremˇ-ˇipsum", cx);
433 assert("loremˇ-#$@ˇipsum", cx);
434 assert("ˇlorem_ˇipsum", cx);
435 assert(" ˇdefγˇ", cx);
436 assert(" ˇbcΔˇ", cx);
437 assert(" abˇ——ˇcd", cx);
438 }
439
440 #[gpui::test]
441 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
442 init_test(cx);
443
444 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
445 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
446 assert_eq!(
447 previous_subword_start(&snapshot, display_points[1]),
448 display_points[0]
449 );
450 }
451
452 // Subword boundaries are respected
453 assert("lorem_ˇipˇsum", cx);
454 assert("lorem_ˇipsumˇ", cx);
455 assert("ˇlorem_ˇipsum", cx);
456 assert("lorem_ˇipsum_ˇdolor", cx);
457 assert("loremˇIpˇsum", cx);
458 assert("loremˇIpsumˇ", cx);
459
460 // Word boundaries are still respected
461 assert("\nˇ ˇlorem", cx);
462 assert(" ˇloremˇ", cx);
463 assert(" ˇlorˇem", cx);
464 assert("\nlorem\nˇ ˇipsum", cx);
465 assert("\n\nˇ\nˇ", cx);
466 assert(" ˇlorem ˇipsum", cx);
467 assert("loremˇ-ˇipsum", cx);
468 assert("loremˇ-#$@ˇipsum", cx);
469 assert(" ˇdefγˇ", cx);
470 assert(" bcˇΔˇ", cx);
471 assert(" ˇbcδˇ", cx);
472 assert(" abˇ——ˇcd", cx);
473 }
474
475 #[gpui::test]
476 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
477 init_test(cx);
478
479 fn assert(
480 marked_text: &str,
481 cx: &mut gpui::AppContext,
482 is_boundary: impl FnMut(char, char) -> bool,
483 ) {
484 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
485 assert_eq!(
486 find_preceding_boundary(&snapshot, display_points[1], is_boundary),
487 display_points[0]
488 );
489 }
490
491 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
492 left == 'c' && right == 'd'
493 });
494 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
495 left == '\n' && right == 'g'
496 });
497 let mut line_count = 0;
498 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
499 if left == '\n' {
500 line_count += 1;
501 line_count == 2
502 } else {
503 false
504 }
505 });
506 }
507
508 #[gpui::test]
509 fn test_next_word_end(cx: &mut gpui::AppContext) {
510 init_test(cx);
511
512 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
513 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
514 assert_eq!(
515 next_word_end(&snapshot, display_points[0]),
516 display_points[1]
517 );
518 }
519
520 assert("\nˇ loremˇ", cx);
521 assert(" ˇloremˇ", cx);
522 assert(" lorˇemˇ", cx);
523 assert(" loremˇ ˇ\nipsum\n", cx);
524 assert("\nˇ\nˇ\n\n", cx);
525 assert("loremˇ ipsumˇ ", cx);
526 assert("loremˇ-ˇipsum", cx);
527 assert("loremˇ#$@-ˇipsum", cx);
528 assert("loremˇ_ipsumˇ", cx);
529 assert(" ˇbcΔˇ", cx);
530 assert(" abˇ——ˇcd", cx);
531 }
532
533 #[gpui::test]
534 fn test_next_subword_end(cx: &mut gpui::AppContext) {
535 init_test(cx);
536
537 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
538 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
539 assert_eq!(
540 next_subword_end(&snapshot, display_points[0]),
541 display_points[1]
542 );
543 }
544
545 // Subword boundaries are respected
546 assert("loˇremˇ_ipsum", cx);
547 assert("ˇloremˇ_ipsum", cx);
548 assert("loremˇ_ipsumˇ", cx);
549 assert("loremˇ_ipsumˇ_dolor", cx);
550 assert("loˇremˇIpsum", cx);
551 assert("loremˇIpsumˇDolor", cx);
552
553 // Word boundaries are still respected
554 assert("\nˇ loremˇ", cx);
555 assert(" ˇloremˇ", cx);
556 assert(" lorˇemˇ", cx);
557 assert(" loremˇ ˇ\nipsum\n", cx);
558 assert("\nˇ\nˇ\n\n", cx);
559 assert("loremˇ ipsumˇ ", cx);
560 assert("loremˇ-ˇipsum", cx);
561 assert("loremˇ#$@-ˇipsum", cx);
562 assert("loremˇ_ipsumˇ", cx);
563 assert(" ˇbcˇΔ", cx);
564 assert(" abˇ——ˇcd", cx);
565 }
566
567 #[gpui::test]
568 fn test_find_boundary(cx: &mut gpui::AppContext) {
569 init_test(cx);
570
571 fn assert(
572 marked_text: &str,
573 cx: &mut gpui::AppContext,
574 is_boundary: impl FnMut(char, char) -> bool,
575 ) {
576 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
577 assert_eq!(
578 find_boundary(&snapshot, display_points[0], is_boundary),
579 display_points[1]
580 );
581 }
582
583 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
584 left == 'j' && right == 'k'
585 });
586 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
587 left == '\n' && right == 'i'
588 });
589 let mut line_count = 0;
590 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
591 if left == '\n' {
592 line_count += 1;
593 line_count == 2
594 } else {
595 false
596 }
597 });
598 }
599
600 #[gpui::test]
601 fn test_surrounding_word(cx: &mut gpui::AppContext) {
602 init_test(cx);
603
604 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
605 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
606 assert_eq!(
607 surrounding_word(&snapshot, display_points[1]),
608 display_points[0]..display_points[2]
609 );
610 }
611
612 assert("ˇˇloremˇ ipsum", cx);
613 assert("ˇloˇremˇ ipsum", cx);
614 assert("ˇloremˇˇ ipsum", cx);
615 assert("loremˇ ˇ ˇipsum", cx);
616 assert("lorem\nˇˇˇ\nipsum", cx);
617 assert("lorem\nˇˇipsumˇ", cx);
618 assert("lorem,ˇˇ ˇipsum", cx);
619 assert("ˇloremˇˇ, ipsum", cx);
620 }
621
622 #[gpui::test]
623 fn test_move_up_and_down_with_excerpts(cx: &mut gpui::AppContext) {
624 init_test(cx);
625
626 let family_id = cx
627 .font_cache()
628 .load_family(&["Helvetica"], &Default::default())
629 .unwrap();
630 let font_id = cx
631 .font_cache()
632 .select_font(family_id, &Default::default())
633 .unwrap();
634
635 let buffer = cx.add_model(|cx| Buffer::new(0, "abc\ndefg\nhijkl\nmn", cx));
636 let multibuffer = cx.add_model(|cx| {
637 let mut multibuffer = MultiBuffer::new(0);
638 multibuffer.push_excerpts(
639 buffer.clone(),
640 [
641 ExcerptRange {
642 context: Point::new(0, 0)..Point::new(1, 4),
643 primary: None,
644 },
645 ExcerptRange {
646 context: Point::new(2, 0)..Point::new(3, 2),
647 primary: None,
648 },
649 ],
650 cx,
651 );
652 multibuffer
653 });
654 let display_map =
655 cx.add_model(|cx| DisplayMap::new(multibuffer, font_id, 14.0, None, 2, 2, cx));
656 let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
657
658 assert_eq!(snapshot.text(), "\n\nabc\ndefg\n\n\nhijkl\nmn");
659
660 // Can't move up into the first excerpt's header
661 assert_eq!(
662 up(
663 &snapshot,
664 DisplayPoint::new(2, 2),
665 SelectionGoal::Column(2),
666 false
667 ),
668 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
669 );
670 assert_eq!(
671 up(
672 &snapshot,
673 DisplayPoint::new(2, 0),
674 SelectionGoal::None,
675 false
676 ),
677 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
678 );
679
680 // Move up and down within first excerpt
681 assert_eq!(
682 up(
683 &snapshot,
684 DisplayPoint::new(3, 4),
685 SelectionGoal::Column(4),
686 false
687 ),
688 (DisplayPoint::new(2, 3), SelectionGoal::Column(4)),
689 );
690 assert_eq!(
691 down(
692 &snapshot,
693 DisplayPoint::new(2, 3),
694 SelectionGoal::Column(4),
695 false
696 ),
697 (DisplayPoint::new(3, 4), SelectionGoal::Column(4)),
698 );
699
700 // Move up and down across second excerpt's header
701 assert_eq!(
702 up(
703 &snapshot,
704 DisplayPoint::new(6, 5),
705 SelectionGoal::Column(5),
706 false
707 ),
708 (DisplayPoint::new(3, 4), SelectionGoal::Column(5)),
709 );
710 assert_eq!(
711 down(
712 &snapshot,
713 DisplayPoint::new(3, 4),
714 SelectionGoal::Column(5),
715 false
716 ),
717 (DisplayPoint::new(6, 5), SelectionGoal::Column(5)),
718 );
719
720 // Can't move down off the end
721 assert_eq!(
722 down(
723 &snapshot,
724 DisplayPoint::new(7, 0),
725 SelectionGoal::Column(0),
726 false
727 ),
728 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
729 );
730 assert_eq!(
731 down(
732 &snapshot,
733 DisplayPoint::new(7, 2),
734 SelectionGoal::Column(2),
735 false
736 ),
737 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
738 );
739 }
740
741 fn init_test(cx: &mut gpui::AppContext) {
742 cx.set_global(SettingsStore::test(cx));
743 theme::init((), cx);
744 language::init(cx);
745 crate::init(cx);
746 }
747}