1use super::{Bias, DisplayPoint, DisplaySnapshot, SelectionGoal, ToDisplayPoint};
2use crate::{char_kind, CharKind, EditorStyle, ToOffset, ToPoint};
3use gpui::{FontCache, TextLayoutCache};
4use language::Point;
5use std::{ops::Range, sync::Arc};
6
7#[derive(Debug, PartialEq)]
8pub enum FindRange {
9 SingleLine,
10 MultiLine,
11}
12
13/// TextLayoutDetails encompasses everything we need to move vertically
14/// taking into account variable width characters.
15pub struct TextLayoutDetails {
16 pub font_cache: Arc<FontCache>,
17 pub text_layout_cache: Arc<TextLayoutCache>,
18 pub editor_style: EditorStyle,
19}
20
21pub fn left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
22 if point.column() > 0 {
23 *point.column_mut() -= 1;
24 } else if point.row() > 0 {
25 *point.row_mut() -= 1;
26 *point.column_mut() = map.line_len(point.row());
27 }
28 map.clip_point(point, Bias::Left)
29}
30
31pub fn saturating_left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
32 if point.column() > 0 {
33 *point.column_mut() -= 1;
34 }
35 map.clip_point(point, Bias::Left)
36}
37
38pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
39 let max_column = map.line_len(point.row());
40 if point.column() < max_column {
41 *point.column_mut() += 1;
42 } else if point.row() < map.max_point().row() {
43 *point.row_mut() += 1;
44 *point.column_mut() = 0;
45 }
46 map.clip_point(point, Bias::Right)
47}
48
49pub fn saturating_right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
50 *point.column_mut() += 1;
51 map.clip_point(point, Bias::Right)
52}
53
54pub fn up(
55 map: &DisplaySnapshot,
56 start: DisplayPoint,
57 goal: SelectionGoal,
58 preserve_column_at_start: bool,
59 text_layout_details: &TextLayoutDetails,
60) -> (DisplayPoint, SelectionGoal) {
61 up_by_rows(
62 map,
63 start,
64 1,
65 goal,
66 preserve_column_at_start,
67 text_layout_details,
68 )
69}
70
71pub fn down(
72 map: &DisplaySnapshot,
73 start: DisplayPoint,
74 goal: SelectionGoal,
75 preserve_column_at_end: bool,
76 text_layout_details: &TextLayoutDetails,
77) -> (DisplayPoint, SelectionGoal) {
78 down_by_rows(
79 map,
80 start,
81 1,
82 goal,
83 preserve_column_at_end,
84 text_layout_details,
85 )
86}
87
88pub fn up_by_rows(
89 map: &DisplaySnapshot,
90 start: DisplayPoint,
91 row_count: u32,
92 goal: SelectionGoal,
93 preserve_column_at_start: bool,
94 text_layout_details: &TextLayoutDetails,
95) -> (DisplayPoint, SelectionGoal) {
96 let mut goal_x = match goal {
97 SelectionGoal::HorizontalPosition(x) => x,
98 SelectionGoal::WrappedHorizontalPosition((_, x)) => x,
99 SelectionGoal::HorizontalRange { end, .. } => end,
100 _ => map.x_for_point(start, text_layout_details),
101 };
102
103 let prev_row = start.row().saturating_sub(row_count);
104 let mut point = map.clip_point(
105 DisplayPoint::new(prev_row, map.line_len(prev_row)),
106 Bias::Left,
107 );
108 if point.row() < start.row() {
109 *point.column_mut() = map.column_for_x(point.row(), goal_x, text_layout_details)
110 } else if preserve_column_at_start {
111 return (start, goal);
112 } else {
113 point = DisplayPoint::new(0, 0);
114 goal_x = 0.0;
115 }
116
117 let mut clipped_point = map.clip_point(point, Bias::Left);
118 if clipped_point.row() < point.row() {
119 clipped_point = map.clip_point(point, Bias::Right);
120 }
121 (clipped_point, SelectionGoal::HorizontalPosition(goal_x))
122}
123
124pub fn down_by_rows(
125 map: &DisplaySnapshot,
126 start: DisplayPoint,
127 row_count: u32,
128 goal: SelectionGoal,
129 preserve_column_at_end: bool,
130 text_layout_details: &TextLayoutDetails,
131) -> (DisplayPoint, SelectionGoal) {
132 let mut goal_x = match goal {
133 SelectionGoal::HorizontalPosition(x) => x,
134 SelectionGoal::WrappedHorizontalPosition((_, x)) => x,
135 SelectionGoal::HorizontalRange { end, .. } => end,
136 _ => map.x_for_point(start, text_layout_details),
137 };
138
139 let new_row = start.row() + row_count;
140 let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
141 if point.row() > start.row() {
142 *point.column_mut() = map.column_for_x(point.row(), goal_x, text_layout_details)
143 } else if preserve_column_at_end {
144 return (start, goal);
145 } else {
146 point = map.max_point();
147 goal_x = map.x_for_point(point, text_layout_details)
148 }
149
150 let mut clipped_point = map.clip_point(point, Bias::Right);
151 if clipped_point.row() > point.row() {
152 clipped_point = map.clip_point(point, Bias::Left);
153 }
154 (clipped_point, SelectionGoal::HorizontalPosition(goal_x))
155}
156
157pub fn line_beginning(
158 map: &DisplaySnapshot,
159 display_point: DisplayPoint,
160 stop_at_soft_boundaries: bool,
161) -> DisplayPoint {
162 let point = display_point.to_point(map);
163 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
164 let line_start = map.prev_line_boundary(point).1;
165
166 if stop_at_soft_boundaries && display_point != soft_line_start {
167 soft_line_start
168 } else {
169 line_start
170 }
171}
172
173pub fn indented_line_beginning(
174 map: &DisplaySnapshot,
175 display_point: DisplayPoint,
176 stop_at_soft_boundaries: bool,
177) -> DisplayPoint {
178 let point = display_point.to_point(map);
179 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
180 let indent_start = Point::new(
181 point.row,
182 map.buffer_snapshot.indent_size_for_line(point.row).len,
183 )
184 .to_display_point(map);
185 let line_start = map.prev_line_boundary(point).1;
186
187 if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
188 {
189 soft_line_start
190 } else if stop_at_soft_boundaries && display_point != indent_start {
191 indent_start
192 } else {
193 line_start
194 }
195}
196
197pub fn line_end(
198 map: &DisplaySnapshot,
199 display_point: DisplayPoint,
200 stop_at_soft_boundaries: bool,
201) -> DisplayPoint {
202 let soft_line_end = map.clip_point(
203 DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
204 Bias::Left,
205 );
206 if stop_at_soft_boundaries && display_point != soft_line_end {
207 soft_line_end
208 } else {
209 map.next_line_boundary(display_point.to_point(map)).1
210 }
211}
212
213pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
214 let raw_point = point.to_point(map);
215 let scope = map.buffer_snapshot.language_scope_at(raw_point);
216
217 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
218 (char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace())
219 || left == '\n'
220 })
221}
222
223pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
224 let raw_point = point.to_point(map);
225 let scope = map.buffer_snapshot.language_scope_at(raw_point);
226
227 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
228 let is_word_start =
229 char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace();
230 let is_subword_start =
231 left == '_' && right != '_' || left.is_lowercase() && right.is_uppercase();
232 is_word_start || is_subword_start || left == '\n'
233 })
234}
235
236pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
237 let raw_point = point.to_point(map);
238 let scope = map.buffer_snapshot.language_scope_at(raw_point);
239
240 find_boundary(map, point, FindRange::MultiLine, |left, right| {
241 (char_kind(&scope, left) != char_kind(&scope, right) && !left.is_whitespace())
242 || right == '\n'
243 })
244}
245
246pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
247 let raw_point = point.to_point(map);
248 let scope = map.buffer_snapshot.language_scope_at(raw_point);
249
250 find_boundary(map, point, FindRange::MultiLine, |left, right| {
251 let is_word_end =
252 (char_kind(&scope, left) != char_kind(&scope, right)) && !left.is_whitespace();
253 let is_subword_end =
254 left != '_' && right == '_' || left.is_lowercase() && right.is_uppercase();
255 is_word_end || is_subword_end || right == '\n'
256 })
257}
258
259pub fn start_of_paragraph(
260 map: &DisplaySnapshot,
261 display_point: DisplayPoint,
262 mut count: usize,
263) -> DisplayPoint {
264 let point = display_point.to_point(map);
265 if point.row == 0 {
266 return DisplayPoint::zero();
267 }
268
269 let mut found_non_blank_line = false;
270 for row in (0..point.row + 1).rev() {
271 let blank = map.buffer_snapshot.is_line_blank(row);
272 if found_non_blank_line && blank {
273 if count <= 1 {
274 return Point::new(row, 0).to_display_point(map);
275 }
276 count -= 1;
277 found_non_blank_line = false;
278 }
279
280 found_non_blank_line |= !blank;
281 }
282
283 DisplayPoint::zero()
284}
285
286pub fn end_of_paragraph(
287 map: &DisplaySnapshot,
288 display_point: DisplayPoint,
289 mut count: usize,
290) -> DisplayPoint {
291 let point = display_point.to_point(map);
292 if point.row == map.max_buffer_row() {
293 return map.max_point();
294 }
295
296 let mut found_non_blank_line = false;
297 for row in point.row..map.max_buffer_row() + 1 {
298 let blank = map.buffer_snapshot.is_line_blank(row);
299 if found_non_blank_line && blank {
300 if count <= 1 {
301 return Point::new(row, 0).to_display_point(map);
302 }
303 count -= 1;
304 found_non_blank_line = false;
305 }
306
307 found_non_blank_line |= !blank;
308 }
309
310 map.max_point()
311}
312
313/// Scans for a boundary preceding the given start point `from` until a boundary is found,
314/// indicated by the given predicate returning true.
315/// The predicate is called with the character to the left and right of the candidate boundary location.
316/// 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.
317pub fn find_preceding_boundary(
318 map: &DisplaySnapshot,
319 from: DisplayPoint,
320 find_range: FindRange,
321 mut is_boundary: impl FnMut(char, char) -> bool,
322) -> DisplayPoint {
323 let mut prev_ch = None;
324 let mut offset = from.to_point(map).to_offset(&map.buffer_snapshot);
325
326 for ch in map.buffer_snapshot.reversed_chars_at(offset) {
327 if find_range == FindRange::SingleLine && ch == '\n' {
328 break;
329 }
330 if let Some(prev_ch) = prev_ch {
331 if is_boundary(ch, prev_ch) {
332 break;
333 }
334 }
335
336 offset -= ch.len_utf8();
337 prev_ch = Some(ch);
338 }
339
340 map.clip_point(offset.to_display_point(map), Bias::Left)
341}
342
343/// Scans for a boundary following the given start point until a boundary is found, indicated by the
344/// given predicate returning true. The predicate is called with the character to the left and right
345/// of the candidate boundary location, and will be called with `\n` characters indicating the start
346/// or end of a line.
347pub fn find_boundary(
348 map: &DisplaySnapshot,
349 from: DisplayPoint,
350 find_range: FindRange,
351 mut is_boundary: impl FnMut(char, char) -> bool,
352) -> DisplayPoint {
353 let mut offset = from.to_offset(&map, Bias::Right);
354 let mut prev_ch = None;
355
356 for ch in map.buffer_snapshot.chars_at(offset) {
357 if find_range == FindRange::SingleLine && ch == '\n' {
358 break;
359 }
360 if let Some(prev_ch) = prev_ch {
361 if is_boundary(prev_ch, ch) {
362 break;
363 }
364 }
365
366 offset += ch.len_utf8();
367 prev_ch = Some(ch);
368 }
369 map.clip_point(offset.to_display_point(map), Bias::Right)
370}
371
372pub fn is_inside_word(map: &DisplaySnapshot, point: DisplayPoint) -> bool {
373 let raw_point = point.to_point(map);
374 let scope = map.buffer_snapshot.language_scope_at(raw_point);
375 let ix = map.clip_point(point, Bias::Left).to_offset(map, Bias::Left);
376 let text = &map.buffer_snapshot;
377 let next_char_kind = text.chars_at(ix).next().map(|c| char_kind(&scope, c));
378 let prev_char_kind = text
379 .reversed_chars_at(ix)
380 .next()
381 .map(|c| char_kind(&scope, c));
382 prev_char_kind.zip(next_char_kind) == Some((CharKind::Word, CharKind::Word))
383}
384
385pub fn surrounding_word(map: &DisplaySnapshot, position: DisplayPoint) -> Range<DisplayPoint> {
386 let position = map
387 .clip_point(position, Bias::Left)
388 .to_offset(map, Bias::Left);
389 let (range, _) = map.buffer_snapshot.surrounding_word(position);
390 let start = range
391 .start
392 .to_point(&map.buffer_snapshot)
393 .to_display_point(map);
394 let end = range
395 .end
396 .to_point(&map.buffer_snapshot)
397 .to_display_point(map);
398 start..end
399}
400
401pub fn split_display_range_by_lines(
402 map: &DisplaySnapshot,
403 range: Range<DisplayPoint>,
404) -> Vec<Range<DisplayPoint>> {
405 let mut result = Vec::new();
406
407 let mut start = range.start;
408 // Loop over all the covered rows until the one containing the range end
409 for row in range.start.row()..range.end.row() {
410 let row_end_column = map.line_len(row);
411 let end = map.clip_point(DisplayPoint::new(row, row_end_column), Bias::Left);
412 if start != end {
413 result.push(start..end);
414 }
415 start = map.clip_point(DisplayPoint::new(row + 1, 0), Bias::Left);
416 }
417
418 // Add the final range from the start of the last end to the original range end.
419 result.push(start..range.end);
420
421 result
422}
423
424#[cfg(test)]
425mod tests {
426 use super::*;
427 use crate::{
428 display_map::Inlay,
429 test::{editor_test_context::EditorTestContext, marked_display_snapshot},
430 Buffer, DisplayMap, ExcerptRange, InlayId, MultiBuffer,
431 };
432 use project::Project;
433 use settings::SettingsStore;
434 use util::post_inc;
435
436 #[gpui::test]
437 fn test_previous_word_start(cx: &mut gpui::AppContext) {
438 init_test(cx);
439
440 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
441 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
442 assert_eq!(
443 previous_word_start(&snapshot, display_points[1]),
444 display_points[0]
445 );
446 }
447
448 assert("\nˇ ˇlorem", cx);
449 assert("ˇ\nˇ lorem", cx);
450 assert(" ˇloremˇ", cx);
451 assert("ˇ ˇlorem", cx);
452 assert(" ˇlorˇem", cx);
453 assert("\nlorem\nˇ ˇipsum", cx);
454 assert("\n\nˇ\nˇ", cx);
455 assert(" ˇlorem ˇipsum", cx);
456 assert("loremˇ-ˇipsum", cx);
457 assert("loremˇ-#$@ˇipsum", cx);
458 assert("ˇlorem_ˇipsum", cx);
459 assert(" ˇdefγˇ", cx);
460 assert(" ˇbcΔˇ", cx);
461 assert(" abˇ——ˇcd", cx);
462 }
463
464 #[gpui::test]
465 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
466 init_test(cx);
467
468 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
469 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
470 assert_eq!(
471 previous_subword_start(&snapshot, display_points[1]),
472 display_points[0]
473 );
474 }
475
476 // Subword boundaries are respected
477 assert("lorem_ˇipˇsum", cx);
478 assert("lorem_ˇipsumˇ", cx);
479 assert("ˇlorem_ˇipsum", cx);
480 assert("lorem_ˇipsum_ˇdolor", cx);
481 assert("loremˇIpˇsum", cx);
482 assert("loremˇIpsumˇ", cx);
483
484 // Word boundaries are still respected
485 assert("\nˇ ˇlorem", cx);
486 assert(" ˇloremˇ", cx);
487 assert(" ˇlorˇem", cx);
488 assert("\nlorem\nˇ ˇipsum", cx);
489 assert("\n\nˇ\nˇ", cx);
490 assert(" ˇlorem ˇipsum", cx);
491 assert("loremˇ-ˇipsum", cx);
492 assert("loremˇ-#$@ˇipsum", cx);
493 assert(" ˇdefγˇ", cx);
494 assert(" bcˇΔˇ", cx);
495 assert(" ˇbcδˇ", cx);
496 assert(" abˇ——ˇcd", cx);
497 }
498
499 #[gpui::test]
500 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
501 init_test(cx);
502
503 fn assert(
504 marked_text: &str,
505 cx: &mut gpui::AppContext,
506 is_boundary: impl FnMut(char, char) -> bool,
507 ) {
508 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
509 assert_eq!(
510 find_preceding_boundary(
511 &snapshot,
512 display_points[1],
513 FindRange::MultiLine,
514 is_boundary
515 ),
516 display_points[0]
517 );
518 }
519
520 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
521 left == 'c' && right == 'd'
522 });
523 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
524 left == '\n' && right == 'g'
525 });
526 let mut line_count = 0;
527 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
528 if left == '\n' {
529 line_count += 1;
530 line_count == 2
531 } else {
532 false
533 }
534 });
535 }
536
537 #[gpui::test]
538 fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::AppContext) {
539 init_test(cx);
540
541 let input_text = "abcdefghijklmnopqrstuvwxys";
542 let family_id = cx
543 .font_cache()
544 .load_family(&["Helvetica"], &Default::default())
545 .unwrap();
546 let font_id = cx
547 .font_cache()
548 .select_font(family_id, &Default::default())
549 .unwrap();
550 let font_size = 14.0;
551 let buffer = MultiBuffer::build_simple(input_text, cx);
552 let buffer_snapshot = buffer.read(cx).snapshot(cx);
553 let display_map =
554 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
555
556 // add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
557 let mut id = 0;
558 let inlays = (0..buffer_snapshot.len())
559 .map(|offset| {
560 [
561 Inlay {
562 id: InlayId::Suggestion(post_inc(&mut id)),
563 position: buffer_snapshot.anchor_at(offset, Bias::Left),
564 text: format!("test").into(),
565 },
566 Inlay {
567 id: InlayId::Suggestion(post_inc(&mut id)),
568 position: buffer_snapshot.anchor_at(offset, Bias::Right),
569 text: format!("test").into(),
570 },
571 Inlay {
572 id: InlayId::Hint(post_inc(&mut id)),
573 position: buffer_snapshot.anchor_at(offset, Bias::Left),
574 text: format!("test").into(),
575 },
576 Inlay {
577 id: InlayId::Hint(post_inc(&mut id)),
578 position: buffer_snapshot.anchor_at(offset, Bias::Right),
579 text: format!("test").into(),
580 },
581 ]
582 })
583 .flatten()
584 .collect();
585 let snapshot = display_map.update(cx, |map, cx| {
586 map.splice_inlays(Vec::new(), inlays, cx);
587 map.snapshot(cx)
588 });
589
590 assert_eq!(
591 find_preceding_boundary(
592 &snapshot,
593 buffer_snapshot.len().to_display_point(&snapshot),
594 FindRange::MultiLine,
595 |left, _| left == 'e',
596 ),
597 snapshot
598 .buffer_snapshot
599 .offset_to_point(5)
600 .to_display_point(&snapshot),
601 "Should not stop at inlays when looking for boundaries"
602 );
603 }
604
605 #[gpui::test]
606 fn test_next_word_end(cx: &mut gpui::AppContext) {
607 init_test(cx);
608
609 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
610 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
611 assert_eq!(
612 next_word_end(&snapshot, display_points[0]),
613 display_points[1]
614 );
615 }
616
617 assert("\nˇ loremˇ", cx);
618 assert(" ˇloremˇ", cx);
619 assert(" lorˇemˇ", cx);
620 assert(" loremˇ ˇ\nipsum\n", cx);
621 assert("\nˇ\nˇ\n\n", cx);
622 assert("loremˇ ipsumˇ ", cx);
623 assert("loremˇ-ˇipsum", cx);
624 assert("loremˇ#$@-ˇipsum", cx);
625 assert("loremˇ_ipsumˇ", cx);
626 assert(" ˇbcΔˇ", cx);
627 assert(" abˇ——ˇcd", cx);
628 }
629
630 #[gpui::test]
631 fn test_next_subword_end(cx: &mut gpui::AppContext) {
632 init_test(cx);
633
634 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
635 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
636 assert_eq!(
637 next_subword_end(&snapshot, display_points[0]),
638 display_points[1]
639 );
640 }
641
642 // Subword boundaries are respected
643 assert("loˇremˇ_ipsum", cx);
644 assert("ˇloremˇ_ipsum", cx);
645 assert("loremˇ_ipsumˇ", cx);
646 assert("loremˇ_ipsumˇ_dolor", cx);
647 assert("loˇremˇIpsum", cx);
648 assert("loremˇIpsumˇDolor", cx);
649
650 // Word boundaries are still respected
651 assert("\nˇ loremˇ", cx);
652 assert(" ˇloremˇ", cx);
653 assert(" lorˇemˇ", cx);
654 assert(" loremˇ ˇ\nipsum\n", cx);
655 assert("\nˇ\nˇ\n\n", cx);
656 assert("loremˇ ipsumˇ ", cx);
657 assert("loremˇ-ˇipsum", cx);
658 assert("loremˇ#$@-ˇipsum", cx);
659 assert("loremˇ_ipsumˇ", cx);
660 assert(" ˇbcˇΔ", cx);
661 assert(" abˇ——ˇcd", cx);
662 }
663
664 #[gpui::test]
665 fn test_find_boundary(cx: &mut gpui::AppContext) {
666 init_test(cx);
667
668 fn assert(
669 marked_text: &str,
670 cx: &mut gpui::AppContext,
671 is_boundary: impl FnMut(char, char) -> bool,
672 ) {
673 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
674 assert_eq!(
675 find_boundary(
676 &snapshot,
677 display_points[0],
678 FindRange::MultiLine,
679 is_boundary
680 ),
681 display_points[1]
682 );
683 }
684
685 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
686 left == 'j' && right == 'k'
687 });
688 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
689 left == '\n' && right == 'i'
690 });
691 let mut line_count = 0;
692 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
693 if left == '\n' {
694 line_count += 1;
695 line_count == 2
696 } else {
697 false
698 }
699 });
700 }
701
702 #[gpui::test]
703 fn test_surrounding_word(cx: &mut gpui::AppContext) {
704 init_test(cx);
705
706 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
707 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
708 assert_eq!(
709 surrounding_word(&snapshot, display_points[1]),
710 display_points[0]..display_points[2]
711 );
712 }
713
714 assert("ˇˇloremˇ ipsum", cx);
715 assert("ˇloˇremˇ ipsum", cx);
716 assert("ˇloremˇˇ ipsum", cx);
717 assert("loremˇ ˇ ˇipsum", cx);
718 assert("lorem\nˇˇˇ\nipsum", cx);
719 assert("lorem\nˇˇipsumˇ", cx);
720 assert("lorem,ˇˇ ˇipsum", cx);
721 assert("ˇloremˇˇ, ipsum", cx);
722 }
723
724 #[gpui::test]
725 async fn test_move_up_and_down_with_excerpts(cx: &mut gpui::TestAppContext) {
726 cx.update(|cx| {
727 init_test(cx);
728 });
729
730 let mut cx = EditorTestContext::new(cx).await;
731 let editor = cx.editor.clone();
732 let window = cx.window.clone();
733 cx.update_window(window, |cx| {
734 let text_layout_details =
735 editor.read_with(cx, |editor, cx| editor.text_layout_details(cx));
736
737 let family_id = cx
738 .font_cache()
739 .load_family(&["Helvetica"], &Default::default())
740 .unwrap();
741 let font_id = cx
742 .font_cache()
743 .select_font(family_id, &Default::default())
744 .unwrap();
745
746 let buffer =
747 cx.add_model(|cx| Buffer::new(0, cx.model_id() as u64, "abc\ndefg\nhijkl\nmn"));
748 let multibuffer = cx.add_model(|cx| {
749 let mut multibuffer = MultiBuffer::new(0);
750 multibuffer.push_excerpts(
751 buffer.clone(),
752 [
753 ExcerptRange {
754 context: Point::new(0, 0)..Point::new(1, 4),
755 primary: None,
756 },
757 ExcerptRange {
758 context: Point::new(2, 0)..Point::new(3, 2),
759 primary: None,
760 },
761 ],
762 cx,
763 );
764 multibuffer
765 });
766 let display_map =
767 cx.add_model(|cx| DisplayMap::new(multibuffer, font_id, 14.0, None, 2, 2, cx));
768 let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
769
770 assert_eq!(snapshot.text(), "\n\nabc\ndefg\n\n\nhijkl\nmn");
771
772 let col_2_x = snapshot.x_for_point(DisplayPoint::new(2, 2), &text_layout_details);
773
774 // Can't move up into the first excerpt's header
775 assert_eq!(
776 up(
777 &snapshot,
778 DisplayPoint::new(2, 2),
779 SelectionGoal::HorizontalPosition(col_2_x),
780 false,
781 &text_layout_details
782 ),
783 (
784 DisplayPoint::new(2, 0),
785 SelectionGoal::HorizontalPosition(0.0)
786 ),
787 );
788 assert_eq!(
789 up(
790 &snapshot,
791 DisplayPoint::new(2, 0),
792 SelectionGoal::None,
793 false,
794 &text_layout_details
795 ),
796 (
797 DisplayPoint::new(2, 0),
798 SelectionGoal::HorizontalPosition(0.0)
799 ),
800 );
801
802 let col_4_x = snapshot.x_for_point(DisplayPoint::new(3, 4), &text_layout_details);
803
804 // Move up and down within first excerpt
805 assert_eq!(
806 up(
807 &snapshot,
808 DisplayPoint::new(3, 4),
809 SelectionGoal::HorizontalPosition(col_4_x),
810 false,
811 &text_layout_details
812 ),
813 (
814 DisplayPoint::new(2, 3),
815 SelectionGoal::HorizontalPosition(col_4_x)
816 ),
817 );
818 assert_eq!(
819 down(
820 &snapshot,
821 DisplayPoint::new(2, 3),
822 SelectionGoal::HorizontalPosition(col_4_x),
823 false,
824 &text_layout_details
825 ),
826 (
827 DisplayPoint::new(3, 4),
828 SelectionGoal::HorizontalPosition(col_4_x)
829 ),
830 );
831
832 let col_5_x = snapshot.x_for_point(DisplayPoint::new(6, 5), &text_layout_details);
833
834 // Move up and down across second excerpt's header
835 assert_eq!(
836 up(
837 &snapshot,
838 DisplayPoint::new(6, 5),
839 SelectionGoal::HorizontalPosition(col_5_x),
840 false,
841 &text_layout_details
842 ),
843 (
844 DisplayPoint::new(3, 4),
845 SelectionGoal::HorizontalPosition(col_5_x)
846 ),
847 );
848 assert_eq!(
849 down(
850 &snapshot,
851 DisplayPoint::new(3, 4),
852 SelectionGoal::HorizontalPosition(col_5_x),
853 false,
854 &text_layout_details
855 ),
856 (
857 DisplayPoint::new(6, 5),
858 SelectionGoal::HorizontalPosition(col_5_x)
859 ),
860 );
861
862 let max_point_x = snapshot.x_for_point(DisplayPoint::new(7, 2), &text_layout_details);
863
864 // Can't move down off the end
865 assert_eq!(
866 down(
867 &snapshot,
868 DisplayPoint::new(7, 0),
869 SelectionGoal::HorizontalPosition(0.0),
870 false,
871 &text_layout_details
872 ),
873 (
874 DisplayPoint::new(7, 2),
875 SelectionGoal::HorizontalPosition(max_point_x)
876 ),
877 );
878 assert_eq!(
879 down(
880 &snapshot,
881 DisplayPoint::new(7, 2),
882 SelectionGoal::HorizontalPosition(max_point_x),
883 false,
884 &text_layout_details
885 ),
886 (
887 DisplayPoint::new(7, 2),
888 SelectionGoal::HorizontalPosition(max_point_x)
889 ),
890 );
891 });
892 }
893
894 fn init_test(cx: &mut gpui::AppContext) {
895 cx.set_global(SettingsStore::test(cx));
896 theme::init((), cx);
897 language::init(cx);
898 crate::init(cx);
899 Project::init_settings(cx);
900 }
901}