1use super::{Bias, DisplayPoint, DisplaySnapshot, SelectionGoal, ToDisplayPoint};
2use crate::{char_kind, CharKind, Editor, EditorStyle, ToOffset, ToPoint};
3use gpui::{FontCache, TextLayoutCache, WindowContext};
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
21impl TextLayoutDetails {
22 pub fn new(editor: &Editor, cx: &WindowContext) -> TextLayoutDetails {
23 TextLayoutDetails {
24 font_cache: cx.font_cache().clone(),
25 text_layout_cache: cx.text_layout_cache().clone(),
26 editor_style: editor.style(cx),
27 }
28 }
29}
30
31pub fn left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
32 if point.column() > 0 {
33 *point.column_mut() -= 1;
34 } else if point.row() > 0 {
35 *point.row_mut() -= 1;
36 *point.column_mut() = map.line_len(point.row());
37 }
38 map.clip_point(point, Bias::Left)
39}
40
41pub fn saturating_left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
42 if point.column() > 0 {
43 *point.column_mut() -= 1;
44 }
45 map.clip_point(point, Bias::Left)
46}
47
48pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
49 let max_column = map.line_len(point.row());
50 if point.column() < max_column {
51 *point.column_mut() += 1;
52 } else if point.row() < map.max_point().row() {
53 *point.row_mut() += 1;
54 *point.column_mut() = 0;
55 }
56 map.clip_point(point, Bias::Right)
57}
58
59pub fn saturating_right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
60 *point.column_mut() += 1;
61 map.clip_point(point, Bias::Right)
62}
63
64pub fn up(
65 map: &DisplaySnapshot,
66 start: DisplayPoint,
67 goal: SelectionGoal,
68 preserve_column_at_start: bool,
69 text_layout_details: &TextLayoutDetails,
70) -> (DisplayPoint, SelectionGoal) {
71 up_by_rows(
72 map,
73 start,
74 1,
75 goal,
76 preserve_column_at_start,
77 text_layout_details,
78 )
79}
80
81pub fn down(
82 map: &DisplaySnapshot,
83 start: DisplayPoint,
84 goal: SelectionGoal,
85 preserve_column_at_end: bool,
86 text_layout_details: &TextLayoutDetails,
87) -> (DisplayPoint, SelectionGoal) {
88 down_by_rows(
89 map,
90 start,
91 1,
92 goal,
93 preserve_column_at_end,
94 text_layout_details,
95 )
96}
97
98pub fn up_by_rows(
99 map: &DisplaySnapshot,
100 start: DisplayPoint,
101 row_count: u32,
102 goal: SelectionGoal,
103 preserve_column_at_start: bool,
104 text_layout_details: &TextLayoutDetails,
105) -> (DisplayPoint, SelectionGoal) {
106 let mut goal_x = match goal {
107 SelectionGoal::HorizontalPosition(x) => x,
108 SelectionGoal::WrappedHorizontalPosition((_, x)) => x,
109 SelectionGoal::HorizontalRange { end, .. } => end,
110 SelectionGoal::WrappedHorizontalRange { end: (_, end), .. } => end,
111 _ => map.x_for_point(start, text_layout_details),
112 };
113
114 let prev_row = start.row().saturating_sub(row_count);
115 let mut point = map.clip_point(
116 DisplayPoint::new(prev_row, map.line_len(prev_row)),
117 Bias::Left,
118 );
119 if point.row() < start.row() {
120 *point.column_mut() = map.column_for_x(point.row(), goal_x, text_layout_details)
121 } else if preserve_column_at_start {
122 return (start, goal);
123 } else {
124 point = DisplayPoint::new(0, 0);
125 goal_x = 0.0;
126 }
127
128 let mut clipped_point = map.clip_point(point, Bias::Left);
129 if clipped_point.row() < point.row() {
130 clipped_point = map.clip_point(point, Bias::Right);
131 }
132 (clipped_point, SelectionGoal::HorizontalPosition(goal_x))
133}
134
135pub fn down_by_rows(
136 map: &DisplaySnapshot,
137 start: DisplayPoint,
138 row_count: u32,
139 goal: SelectionGoal,
140 preserve_column_at_end: bool,
141 text_layout_details: &TextLayoutDetails,
142) -> (DisplayPoint, SelectionGoal) {
143 let mut goal_x = match goal {
144 SelectionGoal::HorizontalPosition(x) => x,
145 SelectionGoal::WrappedHorizontalPosition((_, x)) => x,
146 SelectionGoal::HorizontalRange { end, .. } => end,
147 SelectionGoal::WrappedHorizontalRange { end: (_, end), .. } => end,
148 _ => map.x_for_point(start, text_layout_details),
149 };
150
151 let new_row = start.row() + row_count;
152 let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
153 if point.row() > start.row() {
154 *point.column_mut() = map.column_for_x(point.row(), goal_x, text_layout_details)
155 } else if preserve_column_at_end {
156 return (start, goal);
157 } else {
158 point = map.max_point();
159 goal_x = map.x_for_point(point, text_layout_details)
160 }
161
162 let mut clipped_point = map.clip_point(point, Bias::Right);
163 if clipped_point.row() > point.row() {
164 clipped_point = map.clip_point(point, Bias::Left);
165 }
166 (clipped_point, SelectionGoal::HorizontalPosition(goal_x))
167}
168
169pub fn line_beginning(
170 map: &DisplaySnapshot,
171 display_point: DisplayPoint,
172 stop_at_soft_boundaries: bool,
173) -> DisplayPoint {
174 let point = display_point.to_point(map);
175 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
176 let line_start = map.prev_line_boundary(point).1;
177
178 if stop_at_soft_boundaries && display_point != soft_line_start {
179 soft_line_start
180 } else {
181 line_start
182 }
183}
184
185pub fn indented_line_beginning(
186 map: &DisplaySnapshot,
187 display_point: DisplayPoint,
188 stop_at_soft_boundaries: bool,
189) -> DisplayPoint {
190 let point = display_point.to_point(map);
191 let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
192 let indent_start = Point::new(
193 point.row,
194 map.buffer_snapshot.indent_size_for_line(point.row).len,
195 )
196 .to_display_point(map);
197 let line_start = map.prev_line_boundary(point).1;
198
199 if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
200 {
201 soft_line_start
202 } else if stop_at_soft_boundaries && display_point != indent_start {
203 indent_start
204 } else {
205 line_start
206 }
207}
208
209pub fn line_end(
210 map: &DisplaySnapshot,
211 display_point: DisplayPoint,
212 stop_at_soft_boundaries: bool,
213) -> DisplayPoint {
214 let soft_line_end = map.clip_point(
215 DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
216 Bias::Left,
217 );
218 if stop_at_soft_boundaries && display_point != soft_line_end {
219 soft_line_end
220 } else {
221 map.next_line_boundary(display_point.to_point(map)).1
222 }
223}
224
225pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
226 let raw_point = point.to_point(map);
227 let scope = map.buffer_snapshot.language_scope_at(raw_point);
228
229 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
230 (char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace())
231 || left == '\n'
232 })
233}
234
235pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
236 let raw_point = point.to_point(map);
237 let scope = map.buffer_snapshot.language_scope_at(raw_point);
238
239 find_preceding_boundary(map, point, FindRange::MultiLine, |left, right| {
240 let is_word_start =
241 char_kind(&scope, left) != char_kind(&scope, right) && !right.is_whitespace();
242 let is_subword_start =
243 left == '_' && right != '_' || left.is_lowercase() && right.is_uppercase();
244 is_word_start || is_subword_start || left == '\n'
245 })
246}
247
248pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
249 let raw_point = point.to_point(map);
250 let scope = map.buffer_snapshot.language_scope_at(raw_point);
251
252 find_boundary(map, point, FindRange::MultiLine, |left, right| {
253 (char_kind(&scope, left) != char_kind(&scope, right) && !left.is_whitespace())
254 || right == '\n'
255 })
256}
257
258pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
259 let raw_point = point.to_point(map);
260 let scope = map.buffer_snapshot.language_scope_at(raw_point);
261
262 find_boundary(map, point, FindRange::MultiLine, |left, right| {
263 let is_word_end =
264 (char_kind(&scope, left) != char_kind(&scope, right)) && !left.is_whitespace();
265 let is_subword_end =
266 left != '_' && right == '_' || left.is_lowercase() && right.is_uppercase();
267 is_word_end || is_subword_end || right == '\n'
268 })
269}
270
271pub fn start_of_paragraph(
272 map: &DisplaySnapshot,
273 display_point: DisplayPoint,
274 mut count: usize,
275) -> DisplayPoint {
276 let point = display_point.to_point(map);
277 if point.row == 0 {
278 return map.max_point();
279 }
280
281 let mut found_non_blank_line = false;
282 for row in (0..point.row + 1).rev() {
283 let blank = map.buffer_snapshot.is_line_blank(row);
284 if found_non_blank_line && blank {
285 if count <= 1 {
286 return Point::new(row, 0).to_display_point(map);
287 }
288 count -= 1;
289 found_non_blank_line = false;
290 }
291
292 found_non_blank_line |= !blank;
293 }
294
295 DisplayPoint::zero()
296}
297
298pub fn end_of_paragraph(
299 map: &DisplaySnapshot,
300 display_point: DisplayPoint,
301 mut count: usize,
302) -> DisplayPoint {
303 let point = display_point.to_point(map);
304 if point.row == map.max_buffer_row() {
305 return DisplayPoint::zero();
306 }
307
308 let mut found_non_blank_line = false;
309 for row in point.row..map.max_buffer_row() + 1 {
310 let blank = map.buffer_snapshot.is_line_blank(row);
311 if found_non_blank_line && blank {
312 if count <= 1 {
313 return Point::new(row, 0).to_display_point(map);
314 }
315 count -= 1;
316 found_non_blank_line = false;
317 }
318
319 found_non_blank_line |= !blank;
320 }
321
322 map.max_point()
323}
324
325/// Scans for a boundary preceding the given start point `from` until a boundary is found,
326/// indicated by the given predicate returning true.
327/// The predicate is called with the character to the left and right of the candidate boundary location.
328/// 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.
329pub fn find_preceding_boundary(
330 map: &DisplaySnapshot,
331 from: DisplayPoint,
332 find_range: FindRange,
333 mut is_boundary: impl FnMut(char, char) -> bool,
334) -> DisplayPoint {
335 let mut prev_ch = None;
336 let mut offset = from.to_point(map).to_offset(&map.buffer_snapshot);
337
338 for ch in map.buffer_snapshot.reversed_chars_at(offset) {
339 if find_range == FindRange::SingleLine && ch == '\n' {
340 break;
341 }
342 if let Some(prev_ch) = prev_ch {
343 if is_boundary(ch, prev_ch) {
344 break;
345 }
346 }
347
348 offset -= ch.len_utf8();
349 prev_ch = Some(ch);
350 }
351
352 map.clip_point(offset.to_display_point(map), Bias::Left)
353}
354
355/// Scans for a boundary following the given start point until a boundary is found, indicated by the
356/// given predicate returning true. The predicate is called with the character to the left and right
357/// of the candidate boundary location, and will be called with `\n` characters indicating the start
358/// or end of a line.
359pub fn find_boundary(
360 map: &DisplaySnapshot,
361 from: DisplayPoint,
362 find_range: FindRange,
363 mut is_boundary: impl FnMut(char, char) -> bool,
364) -> DisplayPoint {
365 let mut offset = from.to_offset(&map, Bias::Right);
366 let mut prev_ch = None;
367
368 for ch in map.buffer_snapshot.chars_at(offset) {
369 if find_range == FindRange::SingleLine && ch == '\n' {
370 break;
371 }
372 if let Some(prev_ch) = prev_ch {
373 if is_boundary(prev_ch, ch) {
374 break;
375 }
376 }
377
378 offset += ch.len_utf8();
379 prev_ch = Some(ch);
380 }
381 map.clip_point(offset.to_display_point(map), Bias::Right)
382}
383
384pub fn is_inside_word(map: &DisplaySnapshot, point: DisplayPoint) -> bool {
385 let raw_point = point.to_point(map);
386 let scope = map.buffer_snapshot.language_scope_at(raw_point);
387 let ix = map.clip_point(point, Bias::Left).to_offset(map, Bias::Left);
388 let text = &map.buffer_snapshot;
389 let next_char_kind = text.chars_at(ix).next().map(|c| char_kind(&scope, c));
390 let prev_char_kind = text
391 .reversed_chars_at(ix)
392 .next()
393 .map(|c| char_kind(&scope, c));
394 prev_char_kind.zip(next_char_kind) == Some((CharKind::Word, CharKind::Word))
395}
396
397pub fn surrounding_word(map: &DisplaySnapshot, position: DisplayPoint) -> Range<DisplayPoint> {
398 let position = map
399 .clip_point(position, Bias::Left)
400 .to_offset(map, Bias::Left);
401 let (range, _) = map.buffer_snapshot.surrounding_word(position);
402 let start = range
403 .start
404 .to_point(&map.buffer_snapshot)
405 .to_display_point(map);
406 let end = range
407 .end
408 .to_point(&map.buffer_snapshot)
409 .to_display_point(map);
410 start..end
411}
412
413pub fn split_display_range_by_lines(
414 map: &DisplaySnapshot,
415 range: Range<DisplayPoint>,
416) -> Vec<Range<DisplayPoint>> {
417 let mut result = Vec::new();
418
419 let mut start = range.start;
420 // Loop over all the covered rows until the one containing the range end
421 for row in range.start.row()..range.end.row() {
422 let row_end_column = map.line_len(row);
423 let end = map.clip_point(DisplayPoint::new(row, row_end_column), Bias::Left);
424 if start != end {
425 result.push(start..end);
426 }
427 start = map.clip_point(DisplayPoint::new(row + 1, 0), Bias::Left);
428 }
429
430 // Add the final range from the start of the last end to the original range end.
431 result.push(start..range.end);
432
433 result
434}
435
436#[cfg(test)]
437mod tests {
438 use super::*;
439 use crate::{
440 display_map::Inlay,
441 test::{editor_test_context::EditorTestContext, marked_display_snapshot},
442 Buffer, DisplayMap, ExcerptRange, InlayId, MultiBuffer,
443 };
444 use language::language_settings::AllLanguageSettings;
445 use project::Project;
446 use settings::SettingsStore;
447 use util::post_inc;
448
449 #[gpui::test]
450 fn test_previous_word_start(cx: &mut gpui::AppContext) {
451 init_test(cx);
452
453 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
454 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
455 assert_eq!(
456 previous_word_start(&snapshot, display_points[1]),
457 display_points[0]
458 );
459 }
460
461 assert("\nˇ ˇlorem", cx);
462 assert("ˇ\nˇ lorem", cx);
463 assert(" ˇloremˇ", cx);
464 assert("ˇ ˇlorem", cx);
465 assert(" ˇlorˇem", cx);
466 assert("\nlorem\nˇ ˇipsum", cx);
467 assert("\n\nˇ\nˇ", cx);
468 assert(" ˇlorem ˇipsum", cx);
469 assert("loremˇ-ˇipsum", cx);
470 assert("loremˇ-#$@ˇipsum", cx);
471 assert("ˇlorem_ˇipsum", cx);
472 assert(" ˇdefγˇ", cx);
473 assert(" ˇbcΔˇ", cx);
474 assert(" abˇ——ˇcd", cx);
475 }
476
477 #[gpui::test]
478 fn test_previous_subword_start(cx: &mut gpui::AppContext) {
479 init_test(cx);
480
481 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
482 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
483 assert_eq!(
484 previous_subword_start(&snapshot, display_points[1]),
485 display_points[0]
486 );
487 }
488
489 // Subword boundaries are respected
490 assert("lorem_ˇipˇsum", cx);
491 assert("lorem_ˇipsumˇ", cx);
492 assert("ˇlorem_ˇipsum", cx);
493 assert("lorem_ˇipsum_ˇdolor", cx);
494 assert("loremˇIpˇsum", cx);
495 assert("loremˇIpsumˇ", cx);
496
497 // Word boundaries are still respected
498 assert("\nˇ ˇlorem", cx);
499 assert(" ˇloremˇ", cx);
500 assert(" ˇlorˇem", cx);
501 assert("\nlorem\nˇ ˇipsum", cx);
502 assert("\n\nˇ\nˇ", cx);
503 assert(" ˇlorem ˇipsum", cx);
504 assert("loremˇ-ˇipsum", cx);
505 assert("loremˇ-#$@ˇipsum", cx);
506 assert(" ˇdefγˇ", cx);
507 assert(" bcˇΔˇ", cx);
508 assert(" ˇbcδˇ", cx);
509 assert(" abˇ——ˇcd", cx);
510 }
511
512 #[gpui::test]
513 fn test_find_preceding_boundary(cx: &mut gpui::AppContext) {
514 init_test(cx);
515
516 fn assert(
517 marked_text: &str,
518 cx: &mut gpui::AppContext,
519 is_boundary: impl FnMut(char, char) -> bool,
520 ) {
521 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
522 assert_eq!(
523 find_preceding_boundary(
524 &snapshot,
525 display_points[1],
526 FindRange::MultiLine,
527 is_boundary
528 ),
529 display_points[0]
530 );
531 }
532
533 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
534 left == 'c' && right == 'd'
535 });
536 assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
537 left == '\n' && right == 'g'
538 });
539 let mut line_count = 0;
540 assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
541 if left == '\n' {
542 line_count += 1;
543 line_count == 2
544 } else {
545 false
546 }
547 });
548 }
549
550 #[gpui::test]
551 fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::AppContext) {
552 init_test(cx);
553
554 let input_text = "abcdefghijklmnopqrstuvwxys";
555 let family_id = cx
556 .font_cache()
557 .load_family(&["Helvetica"], &Default::default())
558 .unwrap();
559 let font_id = cx
560 .font_cache()
561 .select_font(family_id, &Default::default())
562 .unwrap();
563 let font_size = 14.0;
564 let buffer = MultiBuffer::build_simple(input_text, cx);
565 let buffer_snapshot = buffer.read(cx).snapshot(cx);
566 let display_map =
567 cx.add_model(|cx| DisplayMap::new(buffer, font_id, font_size, None, 1, 1, cx));
568
569 // add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
570 let mut id = 0;
571 let inlays = (0..buffer_snapshot.len())
572 .map(|offset| {
573 [
574 Inlay {
575 id: InlayId::Suggestion(post_inc(&mut id)),
576 position: buffer_snapshot.anchor_at(offset, Bias::Left),
577 text: format!("test").into(),
578 },
579 Inlay {
580 id: InlayId::Suggestion(post_inc(&mut id)),
581 position: buffer_snapshot.anchor_at(offset, Bias::Right),
582 text: format!("test").into(),
583 },
584 Inlay {
585 id: InlayId::Hint(post_inc(&mut id)),
586 position: buffer_snapshot.anchor_at(offset, Bias::Left),
587 text: format!("test").into(),
588 },
589 Inlay {
590 id: InlayId::Hint(post_inc(&mut id)),
591 position: buffer_snapshot.anchor_at(offset, Bias::Right),
592 text: format!("test").into(),
593 },
594 ]
595 })
596 .flatten()
597 .collect();
598 let snapshot = display_map.update(cx, |map, cx| {
599 map.splice_inlays(Vec::new(), inlays, cx);
600 map.snapshot(cx)
601 });
602
603 assert_eq!(
604 find_preceding_boundary(
605 &snapshot,
606 buffer_snapshot.len().to_display_point(&snapshot),
607 FindRange::MultiLine,
608 |left, _| left == 'e',
609 ),
610 snapshot
611 .buffer_snapshot
612 .offset_to_point(5)
613 .to_display_point(&snapshot),
614 "Should not stop at inlays when looking for boundaries"
615 );
616 }
617
618 #[gpui::test]
619 fn test_next_word_end(cx: &mut gpui::AppContext) {
620 init_test(cx);
621
622 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
623 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
624 assert_eq!(
625 next_word_end(&snapshot, display_points[0]),
626 display_points[1]
627 );
628 }
629
630 assert("\nˇ loremˇ", cx);
631 assert(" ˇloremˇ", cx);
632 assert(" lorˇemˇ", cx);
633 assert(" loremˇ ˇ\nipsum\n", cx);
634 assert("\nˇ\nˇ\n\n", cx);
635 assert("loremˇ ipsumˇ ", cx);
636 assert("loremˇ-ˇipsum", cx);
637 assert("loremˇ#$@-ˇipsum", cx);
638 assert("loremˇ_ipsumˇ", cx);
639 assert(" ˇbcΔˇ", cx);
640 assert(" abˇ——ˇcd", cx);
641 }
642
643 #[gpui::test]
644 fn test_next_subword_end(cx: &mut gpui::AppContext) {
645 init_test(cx);
646
647 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
648 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
649 assert_eq!(
650 next_subword_end(&snapshot, display_points[0]),
651 display_points[1]
652 );
653 }
654
655 // Subword boundaries are respected
656 assert("loˇremˇ_ipsum", cx);
657 assert("ˇloremˇ_ipsum", cx);
658 assert("loremˇ_ipsumˇ", cx);
659 assert("loremˇ_ipsumˇ_dolor", cx);
660 assert("loˇremˇIpsum", cx);
661 assert("loremˇIpsumˇDolor", cx);
662
663 // Word boundaries are still respected
664 assert("\nˇ loremˇ", cx);
665 assert(" ˇloremˇ", cx);
666 assert(" lorˇemˇ", cx);
667 assert(" loremˇ ˇ\nipsum\n", cx);
668 assert("\nˇ\nˇ\n\n", cx);
669 assert("loremˇ ipsumˇ ", cx);
670 assert("loremˇ-ˇipsum", cx);
671 assert("loremˇ#$@-ˇipsum", cx);
672 assert("loremˇ_ipsumˇ", cx);
673 assert(" ˇbcˇΔ", cx);
674 assert(" abˇ——ˇcd", cx);
675 }
676
677 #[gpui::test]
678 fn test_find_boundary(cx: &mut gpui::AppContext) {
679 init_test(cx);
680
681 fn assert(
682 marked_text: &str,
683 cx: &mut gpui::AppContext,
684 is_boundary: impl FnMut(char, char) -> bool,
685 ) {
686 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
687 assert_eq!(
688 find_boundary(
689 &snapshot,
690 display_points[0],
691 FindRange::MultiLine,
692 is_boundary
693 ),
694 display_points[1]
695 );
696 }
697
698 assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
699 left == 'j' && right == 'k'
700 });
701 assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
702 left == '\n' && right == 'i'
703 });
704 let mut line_count = 0;
705 assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
706 if left == '\n' {
707 line_count += 1;
708 line_count == 2
709 } else {
710 false
711 }
712 });
713 }
714
715 #[gpui::test]
716 fn test_surrounding_word(cx: &mut gpui::AppContext) {
717 init_test(cx);
718
719 fn assert(marked_text: &str, cx: &mut gpui::AppContext) {
720 let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
721 assert_eq!(
722 surrounding_word(&snapshot, display_points[1]),
723 display_points[0]..display_points[2]
724 );
725 }
726
727 assert("ˇˇloremˇ ipsum", cx);
728 assert("ˇloˇremˇ ipsum", cx);
729 assert("ˇloremˇˇ ipsum", cx);
730 assert("loremˇ ˇ ˇipsum", cx);
731 assert("lorem\nˇˇˇ\nipsum", cx);
732 assert("lorem\nˇˇipsumˇ", cx);
733 assert("lorem,ˇˇ ˇipsum", cx);
734 assert("ˇloremˇˇ, ipsum", cx);
735 }
736
737 #[gpui::test]
738 async fn test_move_up_and_down_with_excerpts(cx: &mut gpui::TestAppContext) {
739 cx.update(|cx| {
740 init_test(cx);
741 });
742
743 let mut cx = EditorTestContext::new(cx).await;
744 let editor = cx.editor.clone();
745 let window = cx.window.clone();
746 cx.update_window(window, |cx| {
747 let text_layout_details =
748 editor.read_with(cx, |editor, cx| TextLayoutDetails::new(editor, 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 let col_2_x = snapshot.x_for_point(DisplayPoint::new(2, 2), &text_layout_details);
786
787 // Can't move up into the first excerpt's header
788 assert_eq!(
789 up(
790 &snapshot,
791 DisplayPoint::new(2, 2),
792 SelectionGoal::HorizontalPosition(col_2_x),
793 false,
794 &text_layout_details
795 ),
796 (
797 DisplayPoint::new(2, 0),
798 SelectionGoal::HorizontalPosition(0.0)
799 ),
800 );
801 assert_eq!(
802 up(
803 &snapshot,
804 DisplayPoint::new(2, 0),
805 SelectionGoal::None,
806 false,
807 &text_layout_details
808 ),
809 (
810 DisplayPoint::new(2, 0),
811 SelectionGoal::HorizontalPosition(0.0)
812 ),
813 );
814
815 let col_4_x = snapshot.x_for_point(DisplayPoint::new(3, 4), &text_layout_details);
816
817 // Move up and down within first excerpt
818 assert_eq!(
819 up(
820 &snapshot,
821 DisplayPoint::new(3, 4),
822 SelectionGoal::HorizontalPosition(col_4_x),
823 false,
824 &text_layout_details
825 ),
826 (
827 DisplayPoint::new(2, 3),
828 SelectionGoal::HorizontalPosition(col_4_x)
829 ),
830 );
831 assert_eq!(
832 down(
833 &snapshot,
834 DisplayPoint::new(2, 3),
835 SelectionGoal::HorizontalPosition(col_4_x),
836 false,
837 &text_layout_details
838 ),
839 (
840 DisplayPoint::new(3, 4),
841 SelectionGoal::HorizontalPosition(col_4_x)
842 ),
843 );
844
845 let col_5_x = snapshot.x_for_point(DisplayPoint::new(6, 5), &text_layout_details);
846
847 // Move up and down across second excerpt's header
848 assert_eq!(
849 up(
850 &snapshot,
851 DisplayPoint::new(6, 5),
852 SelectionGoal::HorizontalPosition(col_5_x),
853 false,
854 &text_layout_details
855 ),
856 (
857 DisplayPoint::new(3, 4),
858 SelectionGoal::HorizontalPosition(col_5_x)
859 ),
860 );
861 assert_eq!(
862 down(
863 &snapshot,
864 DisplayPoint::new(3, 4),
865 SelectionGoal::HorizontalPosition(col_5_x),
866 false,
867 &text_layout_details
868 ),
869 (
870 DisplayPoint::new(6, 5),
871 SelectionGoal::HorizontalPosition(col_5_x)
872 ),
873 );
874
875 let max_point_x = snapshot.x_for_point(DisplayPoint::new(7, 2), &text_layout_details);
876
877 // Can't move down off the end
878 assert_eq!(
879 down(
880 &snapshot,
881 DisplayPoint::new(7, 0),
882 SelectionGoal::HorizontalPosition(0.0),
883 false,
884 &text_layout_details
885 ),
886 (
887 DisplayPoint::new(7, 2),
888 SelectionGoal::HorizontalPosition(max_point_x)
889 ),
890 );
891 assert_eq!(
892 down(
893 &snapshot,
894 DisplayPoint::new(7, 2),
895 SelectionGoal::HorizontalPosition(max_point_x),
896 false,
897 &text_layout_details
898 ),
899 (
900 DisplayPoint::new(7, 2),
901 SelectionGoal::HorizontalPosition(max_point_x)
902 ),
903 );
904 });
905 }
906
907 fn init_test(cx: &mut gpui::AppContext) {
908 cx.set_global(SettingsStore::test(cx));
909 theme::init((), cx);
910 language::init(cx);
911 crate::init(cx);
912 Project::init_settings(cx);
913 }
914}