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 saturating_left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
17 if point.column() > 0 {
18 *point.column_mut() -= 1;
19 }
20 map.clip_point(point, Bias::Left)
21}
22
23pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
24 let max_column = map.line_len(point.row());
25 if point.column() < max_column {
26 *point.column_mut() += 1;
27 } else if point.row() < map.max_point().row() {
28 *point.row_mut() += 1;
29 *point.column_mut() = 0;
30 }
31 map.clip_point(point, Bias::Right)
32}
33
34pub fn saturating_right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
35 *point.column_mut() += 1;
36 map.clip_point(point, Bias::Right)
37}
38
39pub fn up(
40 map: &DisplaySnapshot,
41 start: DisplayPoint,
42 goal: SelectionGoal,
43 preserve_column_at_start: bool,
44) -> (DisplayPoint, SelectionGoal) {
45 up_by_rows(map, start, 1, goal, preserve_column_at_start)
46}
47
48pub fn down(
49 map: &DisplaySnapshot,
50 start: DisplayPoint,
51 goal: SelectionGoal,
52 preserve_column_at_end: bool,
53) -> (DisplayPoint, SelectionGoal) {
54 down_by_rows(map, start, 1, goal, preserve_column_at_end)
55}
56
57pub fn up_by_rows(
58 map: &DisplaySnapshot,
59 start: DisplayPoint,
60 row_count: u32,
61 goal: SelectionGoal,
62 preserve_column_at_start: bool,
63) -> (DisplayPoint, SelectionGoal) {
64 let mut goal_column = match goal {
65 SelectionGoal::Column(column) => column,
66 SelectionGoal::ColumnRange { end, .. } => end,
67 _ => map.column_to_chars(start.row(), start.column()),
68 };
69
70 let prev_row = start.row().saturating_sub(row_count);
71 let mut point = map.clip_point(
72 DisplayPoint::new(prev_row, map.line_len(prev_row)),
73 Bias::Left,
74 );
75 if point.row() < start.row() {
76 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
77 } else if preserve_column_at_start {
78 return (start, goal);
79 } else {
80 point = DisplayPoint::new(0, 0);
81 goal_column = 0;
82 }
83
84 let mut clipped_point = map.clip_point(point, Bias::Left);
85 if clipped_point.row() < point.row() {
86 clipped_point = map.clip_point(point, Bias::Right);
87 }
88 (clipped_point, SelectionGoal::Column(goal_column))
89}
90
91pub fn down_by_rows(
92 map: &DisplaySnapshot,
93 start: DisplayPoint,
94 row_count: u32,
95 goal: SelectionGoal,
96 preserve_column_at_end: bool,
97) -> (DisplayPoint, SelectionGoal) {
98 let mut goal_column = match goal {
99 SelectionGoal::Column(column) => column,
100 SelectionGoal::ColumnRange { end, .. } => end,
101 _ => map.column_to_chars(start.row(), start.column()),
102 };
103
104 let new_row = start.row() + row_count;
105 let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
106 if point.row() > start.row() {
107 *point.column_mut() = map.column_from_chars(point.row(), goal_column);
108 } else if preserve_column_at_end {
109 return (start, goal);
110 } else {
111 point = map.max_point();
112 goal_column = map.column_to_chars(point.row(), point.column())
113 }
114
115 let mut clipped_point = map.clip_point(point, Bias::Right);
116 if clipped_point.row() > point.row() {
117 clipped_point = map.clip_point(point, Bias::Left);
118 }
119 (clipped_point, SelectionGoal::Column(goal_column))
120}
121
122pub fn line_beginning(
123 map: &DisplaySnapshot,
124 display_point: DisplayPoint,
125 stop_at_soft_boundaries: bool,
126) -> DisplayPoint {
127 let point = display_point.to_point(map);
128 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
129 let line_start = map.prev_line_boundary(point).1;
130
131 if stop_at_soft_boundaries && display_point != soft_line_start {
132 soft_line_start
133 } else {
134 line_start
135 }
136}
137
138pub fn indented_line_beginning(
139 map: &DisplaySnapshot,
140 display_point: DisplayPoint,
141 stop_at_soft_boundaries: bool,
142) -> DisplayPoint {
143 let point = display_point.to_point(map);
144 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
145 let indent_start = Point::new(
146 point.row,
147 map.buffer_snapshot.indent_size_for_line(point.row).len,
148 )
149 .to_display_point(map);
150 let line_start = map.prev_line_boundary(point).1;
151
152 if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
153 {
154 soft_line_start
155 } else if stop_at_soft_boundaries && display_point != indent_start {
156 indent_start
157 } else {
158 line_start
159 }
160}
161
162pub fn line_end(
163 map: &DisplaySnapshot,
164 display_point: DisplayPoint,
165 stop_at_soft_boundaries: bool,
166) -> DisplayPoint {
167 let soft_line_end = map.clip_point(
168 DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
169 Bias::Left,
170 );
171 if stop_at_soft_boundaries && display_point != soft_line_end {
172 soft_line_end
173 } else {
174 map.next_line_boundary(display_point.to_point(map)).1
175 }
176}
177
178pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
179 let raw_point = point.to_point(map);
180 let language = map.buffer_snapshot.language_at(raw_point);
181
182 find_preceding_boundary(map, point, |left, right| {
183 (char_kind(language, left) != char_kind(language, right) && !right.is_whitespace())
184 || left == '\n'
185 })
186}
187
188pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
189 let raw_point = point.to_point(map);
190 let language = map.buffer_snapshot.language_at(raw_point);
191 find_preceding_boundary(map, point, |left, right| {
192 let is_word_start =
193 char_kind(language, left) != char_kind(language, right) && !right.is_whitespace();
194 let is_subword_start =
195 left == '_' && right != '_' || left.is_lowercase() && right.is_uppercase();
196 is_word_start || is_subword_start || left == '\n'
197 })
198}
199
200pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
201 let raw_point = point.to_point(map);
202 let language = map.buffer_snapshot.language_at(raw_point);
203 find_boundary(map, point, |left, right| {
204 (char_kind(language, left) != char_kind(language, right) && !left.is_whitespace())
205 || right == '\n'
206 })
207}
208
209pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
210 let raw_point = point.to_point(map);
211 let language = map.buffer_snapshot.language_at(raw_point);
212 find_boundary(map, point, |left, right| {
213 let is_word_end =
214 (char_kind(language, left) != char_kind(language, right)) && !left.is_whitespace();
215 let is_subword_end =
216 left != '_' && right == '_' || left.is_lowercase() && right.is_uppercase();
217 is_word_end || is_subword_end || right == '\n'
218 })
219}
220
221pub fn start_of_paragraph(
222 map: &DisplaySnapshot,
223 display_point: DisplayPoint,
224 mut count: usize,
225) -> DisplayPoint {
226 let point = display_point.to_point(map);
227 if point.row == 0 {
228 return map.max_point();
229 }
230
231 let mut found_non_blank_line = false;
232 for row in (0..point.row + 1).rev() {
233 let blank = map.buffer_snapshot.is_line_blank(row);
234 if found_non_blank_line && blank {
235 if count <= 1 {
236 return Point::new(row, 0).to_display_point(map);
237 }
238 count -= 1;
239 found_non_blank_line = false;
240 }
241
242 found_non_blank_line |= !blank;
243 }
244
245 DisplayPoint::zero()
246}
247
248pub fn end_of_paragraph(
249 map: &DisplaySnapshot,
250 display_point: DisplayPoint,
251 mut count: usize,
252) -> DisplayPoint {
253 let point = display_point.to_point(map);
254 if point.row == map.max_buffer_row() {
255 return DisplayPoint::zero();
256 }
257
258 let mut found_non_blank_line = false;
259 for row in point.row..map.max_buffer_row() + 1 {
260 let blank = map.buffer_snapshot.is_line_blank(row);
261 if found_non_blank_line && blank {
262 if count <= 1 {
263 return Point::new(row, 0).to_display_point(map);
264 }
265 count -= 1;
266 found_non_blank_line = false;
267 }
268
269 found_non_blank_line |= !blank;
270 }
271
272 map.max_point()
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.
279pub fn find_preceding_boundary(
280 map: &DisplaySnapshot,
281 from: DisplayPoint,
282 mut is_boundary: impl FnMut(char, char) -> bool,
283) -> DisplayPoint {
284 let mut start_column = 0;
285 let mut soft_wrap_row = from.row() + 1;
286
287 let mut prev = None;
288 for (ch, point) in map.reverse_chars_at(from) {
289 // Recompute soft_wrap_indent if the row has changed
290 if point.row() != soft_wrap_row {
291 soft_wrap_row = point.row();
292
293 if point.row() == 0 {
294 start_column = 0;
295 } else if let Some(indent) = map.soft_wrap_indent(point.row() - 1) {
296 start_column = indent;
297 }
298 }
299
300 // If the current point is in the soft_wrap, skip comparing it
301 if point.column() < start_column {
302 continue;
303 }
304
305 if let Some((prev_ch, prev_point)) = prev {
306 if is_boundary(ch, prev_ch) {
307 return map.clip_point(prev_point, Bias::Left);
308 }
309 }
310
311 prev = Some((ch, point));
312 }
313 map.clip_point(DisplayPoint::zero(), Bias::Left)
314}
315
316/// Scans for a boundary preceding the given start point `from` until a boundary is found, indicated by the
317/// given predicate returning true. The predicate is called with the character to the left and right
318/// of the candidate boundary location, and will be called with `\n` characters indicating the start
319/// or end of a line. If no boundary is found, the start of the line is returned.
320pub fn find_preceding_boundary_in_line(
321 map: &DisplaySnapshot,
322 from: DisplayPoint,
323 mut is_boundary: impl FnMut(char, char) -> bool,
324) -> DisplayPoint {
325 let mut start_column = 0;
326 if from.row() > 0 {
327 if let Some(indent) = map.soft_wrap_indent(from.row() - 1) {
328 start_column = indent;
329 }
330 }
331
332 let mut prev = None;
333 for (ch, point) in map.reverse_chars_at(from) {
334 if let Some((prev_ch, prev_point)) = prev {
335 if is_boundary(ch, prev_ch) {
336 return map.clip_point(prev_point, Bias::Left);
337 }
338 }
339
340 if ch == '\n' || point.column() < start_column {
341 break;
342 }
343
344 prev = Some((ch, point));
345 }
346
347 map.clip_point(prev.map(|(_, point)| point).unwrap_or(from), Bias::Left)
348}
349
350/// Scans for a boundary following the given start point until a boundary is found, indicated by the
351/// given predicate returning true. The predicate is called with the character to the left and right
352/// of the candidate boundary location, and will be called with `\n` characters indicating the start
353/// or end of a line.
354pub fn find_boundary(
355 map: &DisplaySnapshot,
356 from: DisplayPoint,
357 mut is_boundary: impl FnMut(char, char) -> bool,
358) -> DisplayPoint {
359 let mut prev_ch = None;
360 for (ch, point) in map.chars_at(from) {
361 if let Some(prev_ch) = prev_ch {
362 if is_boundary(prev_ch, ch) {
363 return map.clip_point(point, Bias::Right);
364 }
365 }
366
367 prev_ch = Some(ch);
368 }
369 map.clip_point(map.max_point(), Bias::Right)
370}
371
372/// Scans for a boundary following the given start point until a boundary is found, indicated by the
373/// given predicate returning true. The predicate is called with the character to the left and right
374/// of the candidate boundary location, and will be called with `\n` characters indicating the start
375/// or end of a line. If no boundary is found, the end of the line is returned
376pub fn find_boundary_in_line(
377 map: &DisplaySnapshot,
378 from: DisplayPoint,
379 mut is_boundary: impl FnMut(char, char) -> bool,
380) -> DisplayPoint {
381 let mut prev = None;
382 for (ch, point) in map.chars_at(from) {
383 if let Some((prev_ch, _)) = prev {
384 if is_boundary(prev_ch, ch) {
385 return map.clip_point(point, Bias::Right);
386 }
387 }
388
389 prev = Some((ch, point));
390
391 if ch == '\n' {
392 break;
393 }
394 }
395
396 // Return the last position checked so that we give a point right before the newline or eof.
397 map.clip_point(prev.map(|(_, point)| point).unwrap_or(from), Bias::Right)
398}
399
400pub fn is_inside_word(map: &DisplaySnapshot, point: DisplayPoint) -> bool {
401 let raw_point = point.to_point(map);
402 let language = map.buffer_snapshot.language_at(raw_point);
403 let ix = map.clip_point(point, Bias::Left).to_offset(map, Bias::Left);
404 let text = &map.buffer_snapshot;
405 let next_char_kind = text.chars_at(ix).next().map(|c| char_kind(language, c));
406 let prev_char_kind = text
407 .reversed_chars_at(ix)
408 .next()
409 .map(|c| char_kind(language, c));
410 prev_char_kind.zip(next_char_kind) == Some((CharKind::Word, CharKind::Word))
411}
412
413pub fn surrounding_word(map: &DisplaySnapshot, position: DisplayPoint) -> Range<DisplayPoint> {
414 let position = map
415 .clip_point(position, Bias::Left)
416 .to_offset(map, Bias::Left);
417 let (range, _) = map.buffer_snapshot.surrounding_word(position);
418 let start = range
419 .start
420 .to_point(&map.buffer_snapshot)
421 .to_display_point(map);
422 let end = range
423 .end
424 .to_point(&map.buffer_snapshot)
425 .to_display_point(map);
426 start..end
427}
428
429pub fn split_display_range_by_lines(
430 map: &DisplaySnapshot,
431 range: Range<DisplayPoint>,
432) -> Vec<Range<DisplayPoint>> {
433 let mut result = Vec::new();
434
435 let mut start = range.start;
436 // Loop over all the covered rows until the one containing the range end
437 for row in range.start.row()..range.end.row() {
438 let row_end_column = map.line_len(row);
439 let end = map.clip_point(DisplayPoint::new(row, row_end_column), Bias::Left);
440 if start != end {
441 result.push(start..end);
442 }
443 start = map.clip_point(DisplayPoint::new(row + 1, 0), Bias::Left);
444 }
445
446 // Add the final range from the start of the last end to the original range end.
447 result.push(start..range.end);
448
449 result
450}
451
452#[cfg(test)]
453mod tests {
454 use super::*;
455 use crate::{
456 display_map::Inlay, test::marked_display_snapshot, Buffer, DisplayMap, ExcerptRange,
457 InlayId, MultiBuffer,
458 };
459 use settings::SettingsStore;
460 use util::post_inc;
461
462 #[gpui::test]
463 fn test_previous_word_start(cx: &mut gpui::AppContext) {
464 init_test(cx);
465
466 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
467 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
468 assert_eq!(
469 previous_word_start(&snapshot, display_points[1]),
470 display_points[0]
471 );
472 }
473
474 assert("\nˇ ˇlorem", cx);
475 assert("ˇ\nˇ lorem", cx);
476 assert(" ˇloremˇ", cx);
477 assert("ˇ ˇlorem", cx);
478 assert(" ˇlorˇem", cx);
479 assert("\nlorem\nˇ ˇipsum", cx);
480 assert("\n\nˇ\nˇ", cx);
481 assert(" ˇlorem ˇipsum", cx);
482 assert("loremˇ-ˇipsum", cx);
483 assert("loremˇ-#$@ˇipsum", cx);
484 assert("ˇlorem_ˇipsum", cx);
485 assert(" ˇdefγˇ", cx);
486 assert(" ˇbcΔˇ", cx);
487 assert(" abˇ——ˇcd", cx);
488 }
489
490 #[gpui::test]
491 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
492 init_test(cx);
493
494 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
495 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
496 assert_eq!(
497 previous_subword_start(&snapshot, display_points[1]),
498 display_points[0]
499 );
500 }
501
502 // Subword boundaries are respected
503 assert("lorem_ˇipˇsum", cx);
504 assert("lorem_ˇipsumˇ", cx);
505 assert("ˇlorem_ˇipsum", cx);
506 assert("lorem_ˇipsum_ˇdolor", cx);
507 assert("loremˇIpˇsum", cx);
508 assert("loremˇIpsumˇ", cx);
509
510 // Word boundaries are still respected
511 assert("\nˇ ˇlorem", cx);
512 assert(" ˇloremˇ", cx);
513 assert(" ˇlorˇem", cx);
514 assert("\nlorem\nˇ ˇipsum", cx);
515 assert("\n\nˇ\nˇ", cx);
516 assert(" ˇlorem ˇipsum", cx);
517 assert("loremˇ-ˇipsum", cx);
518 assert("loremˇ-#$@ˇipsum", cx);
519 assert(" ˇdefγˇ", cx);
520 assert(" bcˇΔˇ", cx);
521 assert(" ˇbcδˇ", cx);
522 assert(" abˇ——ˇcd", cx);
523 }
524
525 #[gpui::test]
526 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
527 init_test(cx);
528
529 fn assert(
530 marked_text: &str,
531 cx: &mut gpui::AppContext,
532 is_boundary: impl FnMut(char, char) -> bool,
533 ) {
534 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
535 assert_eq!(
536 find_preceding_boundary(&snapshot, display_points[1], is_boundary),
537 display_points[0]
538 );
539 }
540
541 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
542 left == 'c' && right == 'd'
543 });
544 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
545 left == '\n' && right == 'g'
546 });
547 let mut line_count = 0;
548 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
549 if left == '\n' {
550 line_count += 1;
551 line_count == 2
552 } else {
553 false
554 }
555 });
556 }
557
558 #[gpui::test]
559 fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::AppContext) {
560 init_test(cx);
561
562 let input_text = "abcdefghijklmnopqrstuvwxys";
563 let family_id = cx
564 .font_cache()
565 .load_family(&["Helvetica"], &Default::default())
566 .unwrap();
567 let font_id = cx
568 .font_cache()
569 .select_font(family_id, &Default::default())
570 .unwrap();
571 let font_size = 14.0;
572 let buffer = MultiBuffer::build_simple(input_text, cx);
573 let buffer_snapshot = buffer.read(cx).snapshot(cx);
574 let display_map =
575 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
576
577 // add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
578 let mut id = 0;
579 let inlays = (0..buffer_snapshot.len())
580 .map(|offset| {
581 [
582 Inlay {
583 id: InlayId::Suggestion(post_inc(&mut id)),
584 position: buffer_snapshot.anchor_at(offset, Bias::Left),
585 text: format!("test").into(),
586 },
587 Inlay {
588 id: InlayId::Suggestion(post_inc(&mut id)),
589 position: buffer_snapshot.anchor_at(offset, Bias::Right),
590 text: format!("test").into(),
591 },
592 Inlay {
593 id: InlayId::Hint(post_inc(&mut id)),
594 position: buffer_snapshot.anchor_at(offset, Bias::Left),
595 text: format!("test").into(),
596 },
597 Inlay {
598 id: InlayId::Hint(post_inc(&mut id)),
599 position: buffer_snapshot.anchor_at(offset, Bias::Right),
600 text: format!("test").into(),
601 },
602 ]
603 })
604 .flatten()
605 .collect();
606 let snapshot = display_map.update(cx, |map, cx| {
607 map.splice_inlays(Vec::new(), inlays, cx);
608 map.snapshot(cx)
609 });
610
611 assert_eq!(
612 find_preceding_boundary(
613 &snapshot,
614 buffer_snapshot.len().to_display_point(&snapshot),
615 |left, _| left == 'a',
616 ),
617 0.to_display_point(&snapshot),
618 "Should not stop at inlays when looking for boundaries"
619 );
620
621 assert_eq!(
622 find_preceding_boundary_in_line(
623 &snapshot,
624 buffer_snapshot.len().to_display_point(&snapshot),
625 |left, _| left == 'a',
626 ),
627 0.to_display_point(&snapshot),
628 "Should not stop at inlays when looking for boundaries in line"
629 );
630 }
631
632 #[gpui::test]
633 fn test_next_word_end(cx: &mut gpui::AppContext) {
634 init_test(cx);
635
636 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
637 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
638 assert_eq!(
639 next_word_end(&snapshot, display_points[0]),
640 display_points[1]
641 );
642 }
643
644 assert("\nˇ loremˇ", cx);
645 assert(" ˇloremˇ", cx);
646 assert(" lorˇemˇ", cx);
647 assert(" loremˇ ˇ\nipsum\n", cx);
648 assert("\nˇ\nˇ\n\n", cx);
649 assert("loremˇ ipsumˇ ", cx);
650 assert("loremˇ-ˇipsum", cx);
651 assert("loremˇ#$@-ˇipsum", cx);
652 assert("loremˇ_ipsumˇ", cx);
653 assert(" ˇbcΔˇ", cx);
654 assert(" abˇ——ˇcd", cx);
655 }
656
657 #[gpui::test]
658 fn test_next_subword_end(cx: &mut gpui::AppContext) {
659 init_test(cx);
660
661 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
662 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
663 assert_eq!(
664 next_subword_end(&snapshot, display_points[0]),
665 display_points[1]
666 );
667 }
668
669 // Subword boundaries are respected
670 assert("loˇremˇ_ipsum", cx);
671 assert("ˇloremˇ_ipsum", cx);
672 assert("loremˇ_ipsumˇ", cx);
673 assert("loremˇ_ipsumˇ_dolor", cx);
674 assert("loˇremˇIpsum", cx);
675 assert("loremˇIpsumˇDolor", cx);
676
677 // Word boundaries are still respected
678 assert("\nˇ loremˇ", cx);
679 assert(" ˇloremˇ", cx);
680 assert(" lorˇemˇ", cx);
681 assert(" loremˇ ˇ\nipsum\n", cx);
682 assert("\nˇ\nˇ\n\n", cx);
683 assert("loremˇ ipsumˇ ", cx);
684 assert("loremˇ-ˇipsum", cx);
685 assert("loremˇ#$@-ˇipsum", cx);
686 assert("loremˇ_ipsumˇ", cx);
687 assert(" ˇbcˇΔ", cx);
688 assert(" abˇ——ˇcd", cx);
689 }
690
691 #[gpui::test]
692 fn test_find_boundary(cx: &mut gpui::AppContext) {
693 init_test(cx);
694
695 fn assert(
696 marked_text: &str,
697 cx: &mut gpui::AppContext,
698 is_boundary: impl FnMut(char, char) -> bool,
699 ) {
700 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
701 assert_eq!(
702 find_boundary(&snapshot, display_points[0], is_boundary),
703 display_points[1]
704 );
705 }
706
707 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
708 left == 'j' && right == 'k'
709 });
710 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
711 left == '\n' && right == 'i'
712 });
713 let mut line_count = 0;
714 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
715 if left == '\n' {
716 line_count += 1;
717 line_count == 2
718 } else {
719 false
720 }
721 });
722 }
723
724 #[gpui::test]
725 fn test_surrounding_word(cx: &mut gpui::AppContext) {
726 init_test(cx);
727
728 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
729 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
730 assert_eq!(
731 surrounding_word(&snapshot, display_points[1]),
732 display_points[0]..display_points[2]
733 );
734 }
735
736 assert("ˇˇloremˇ ipsum", cx);
737 assert("ˇloˇremˇ ipsum", cx);
738 assert("ˇloremˇˇ ipsum", cx);
739 assert("loremˇ ˇ ˇipsum", cx);
740 assert("lorem\nˇˇˇ\nipsum", cx);
741 assert("lorem\nˇˇipsumˇ", cx);
742 assert("lorem,ˇˇ ˇipsum", cx);
743 assert("ˇloremˇˇ, ipsum", cx);
744 }
745
746 #[gpui::test]
747 fn test_move_up_and_down_with_excerpts(cx: &mut gpui::AppContext) {
748 init_test(cx);
749
750 let family_id = cx
751 .font_cache()
752 .load_family(&["Helvetica"], &Default::default())
753 .unwrap();
754 let font_id = cx
755 .font_cache()
756 .select_font(family_id, &Default::default())
757 .unwrap();
758
759 let buffer =
760 cx.add_model(|cx| Buffer::new(0, cx.model_id() as u64, "abc\ndefg\nhijkl\nmn"));
761 let multibuffer = cx.add_model(|cx| {
762 let mut multibuffer = MultiBuffer::new(0);
763 multibuffer.push_excerpts(
764 buffer.clone(),
765 [
766 ExcerptRange {
767 context: Point::new(0, 0)..Point::new(1, 4),
768 primary: None,
769 },
770 ExcerptRange {
771 context: Point::new(2, 0)..Point::new(3, 2),
772 primary: None,
773 },
774 ],
775 cx,
776 );
777 multibuffer
778 });
779 let display_map =
780 cx.add_model(|cx| DisplayMap::new(multibuffer, font_id, 14.0, None, 2, 2, cx));
781 let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
782
783 assert_eq!(snapshot.text(), "\n\nabc\ndefg\n\n\nhijkl\nmn");
784
785 // Can't move up into the first excerpt's header
786 assert_eq!(
787 up(
788 &snapshot,
789 DisplayPoint::new(2, 2),
790 SelectionGoal::Column(2),
791 false
792 ),
793 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
794 );
795 assert_eq!(
796 up(
797 &snapshot,
798 DisplayPoint::new(2, 0),
799 SelectionGoal::None,
800 false
801 ),
802 (DisplayPoint::new(2, 0), SelectionGoal::Column(0)),
803 );
804
805 // Move up and down within first excerpt
806 assert_eq!(
807 up(
808 &snapshot,
809 DisplayPoint::new(3, 4),
810 SelectionGoal::Column(4),
811 false
812 ),
813 (DisplayPoint::new(2, 3), SelectionGoal::Column(4)),
814 );
815 assert_eq!(
816 down(
817 &snapshot,
818 DisplayPoint::new(2, 3),
819 SelectionGoal::Column(4),
820 false
821 ),
822 (DisplayPoint::new(3, 4), SelectionGoal::Column(4)),
823 );
824
825 // Move up and down across second excerpt's header
826 assert_eq!(
827 up(
828 &snapshot,
829 DisplayPoint::new(6, 5),
830 SelectionGoal::Column(5),
831 false
832 ),
833 (DisplayPoint::new(3, 4), SelectionGoal::Column(5)),
834 );
835 assert_eq!(
836 down(
837 &snapshot,
838 DisplayPoint::new(3, 4),
839 SelectionGoal::Column(5),
840 false
841 ),
842 (DisplayPoint::new(6, 5), SelectionGoal::Column(5)),
843 );
844
845 // Can't move down off the end
846 assert_eq!(
847 down(
848 &snapshot,
849 DisplayPoint::new(7, 0),
850 SelectionGoal::Column(0),
851 false
852 ),
853 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
854 );
855 assert_eq!(
856 down(
857 &snapshot,
858 DisplayPoint::new(7, 2),
859 SelectionGoal::Column(2),
860 false
861 ),
862 (DisplayPoint::new(7, 2), SelectionGoal::Column(2)),
863 );
864 }
865
866 fn init_test(cx: &mut gpui::AppContext) {
867 cx.set_global(SettingsStore::test(cx));
868 theme::init((), cx);
869 language::init(cx);
870 crate::init(cx);
871 }
872}