1//! This module defines where the text should be displayed in an [`Editor`][Editor].
2//!
3//! Not literally though - rendering, layout and all that jazz is a responsibility of [`EditorElement`][EditorElement].
4//! Instead, [`DisplayMap`] decides where Inlays/Inlay hints are displayed, when
5//! to apply a soft wrap, where to add fold indicators, whether there are any tabs in the buffer that
6//! we display as spaces and where to display custom blocks (like diagnostics).
7//! Seems like a lot? That's because it is. [`DisplayMap`] is conceptually made up
8//! of several smaller structures that form a hierarchy (starting at the bottom):
9//! - [`InlayMap`] that decides where the [`Inlay`]s should be displayed.
10//! - [`FoldMap`] that decides where the fold indicators should be; it also tracks parts of a source file that are currently folded.
11//! - [`TabMap`] that keeps track of hard tabs in a buffer.
12//! - [`WrapMap`] that handles soft wrapping.
13//! - [`BlockMap`] that tracks custom blocks such as diagnostics that should be displayed within buffer.
14//! - [`DisplayMap`] that adds background highlights to the regions of text.
15//! Each one of those builds on top of preceding map.
16//!
17//! [Editor]: crate::Editor
18//! [EditorElement]: crate::element::EditorElement
19
20mod block_map;
21mod fold_map;
22mod inlay_map;
23mod tab_map;
24mod wrap_map;
25
26use crate::EditorStyle;
27use crate::{
28 link_go_to_definition::InlayHighlight, movement::TextLayoutDetails, Anchor, AnchorRangeExt,
29 InlayId, MultiBuffer, MultiBufferSnapshot, ToOffset, ToPoint,
30};
31pub use block_map::{BlockMap, BlockPoint};
32use collections::{BTreeMap, HashMap, HashSet};
33use fold_map::FoldMap;
34use gpui::{Font, HighlightStyle, Hsla, LineLayout, Model, ModelContext, Pixels, UnderlineStyle};
35use inlay_map::InlayMap;
36use language::{
37 language_settings::language_settings, OffsetUtf16, Point, Subscription as BufferSubscription,
38};
39use lsp::DiagnosticSeverity;
40use std::{any::TypeId, borrow::Cow, fmt::Debug, num::NonZeroU32, ops::Range, sync::Arc};
41use sum_tree::{Bias, TreeMap};
42use tab_map::TabMap;
43
44use wrap_map::WrapMap;
45
46pub use block_map::{
47 BlockBufferRows as DisplayBufferRows, BlockChunks as DisplayChunks, BlockContext,
48 BlockDisposition, BlockId, BlockProperties, BlockStyle, RenderBlock, TransformBlock,
49};
50
51pub use self::fold_map::{Fold, FoldPoint};
52pub use self::inlay_map::{InlayOffset, InlayPoint};
53pub(crate) use inlay_map::Inlay;
54
55#[derive(Copy, Clone, Debug, PartialEq, Eq)]
56pub enum FoldStatus {
57 Folded,
58 Foldable,
59}
60
61const UNNECESSARY_CODE_FADE: f32 = 0.3;
62
63pub trait ToDisplayPoint {
64 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint;
65}
66
67type TextHighlights = TreeMap<Option<TypeId>, Arc<(HighlightStyle, Vec<Range<Anchor>>)>>;
68type InlayHighlights = BTreeMap<TypeId, HashMap<InlayId, (HighlightStyle, InlayHighlight)>>;
69
70pub struct DisplayMap {
71 buffer: Model<MultiBuffer>,
72 buffer_subscription: BufferSubscription,
73 fold_map: FoldMap,
74 inlay_map: InlayMap,
75 tab_map: TabMap,
76 wrap_map: Model<WrapMap>,
77 block_map: BlockMap,
78 text_highlights: TextHighlights,
79 inlay_highlights: InlayHighlights,
80 pub clip_at_line_ends: bool,
81}
82
83impl DisplayMap {
84 pub fn new(
85 buffer: Model<MultiBuffer>,
86 font: Font,
87 font_size: Pixels,
88 wrap_width: Option<Pixels>,
89 buffer_header_height: u8,
90 excerpt_header_height: u8,
91 cx: &mut ModelContext<Self>,
92 ) -> Self {
93 let buffer_subscription = buffer.update(cx, |buffer, _| buffer.subscribe());
94
95 let tab_size = Self::tab_size(&buffer, cx);
96 let (inlay_map, snapshot) = InlayMap::new(buffer.read(cx).snapshot(cx));
97 let (fold_map, snapshot) = FoldMap::new(snapshot);
98 let (tab_map, snapshot) = TabMap::new(snapshot, tab_size);
99 let (wrap_map, snapshot) = WrapMap::new(snapshot, font, font_size, wrap_width, cx);
100 let block_map = BlockMap::new(snapshot, buffer_header_height, excerpt_header_height);
101 cx.observe(&wrap_map, |_, _, cx| cx.notify()).detach();
102 DisplayMap {
103 buffer,
104 buffer_subscription,
105 fold_map,
106 inlay_map,
107 tab_map,
108 wrap_map,
109 block_map,
110 text_highlights: Default::default(),
111 inlay_highlights: Default::default(),
112 clip_at_line_ends: false,
113 }
114 }
115
116 pub fn snapshot(&mut self, cx: &mut ModelContext<Self>) -> DisplaySnapshot {
117 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
118 let edits = self.buffer_subscription.consume().into_inner();
119 let (inlay_snapshot, edits) = self.inlay_map.sync(buffer_snapshot, edits);
120 let (fold_snapshot, edits) = self.fold_map.read(inlay_snapshot.clone(), edits);
121 let tab_size = Self::tab_size(&self.buffer, cx);
122 let (tab_snapshot, edits) = self.tab_map.sync(fold_snapshot.clone(), edits, tab_size);
123 let (wrap_snapshot, edits) = self
124 .wrap_map
125 .update(cx, |map, cx| map.sync(tab_snapshot.clone(), edits, cx));
126 let block_snapshot = self.block_map.read(wrap_snapshot.clone(), edits);
127
128 DisplaySnapshot {
129 buffer_snapshot: self.buffer.read(cx).snapshot(cx),
130 fold_snapshot,
131 inlay_snapshot,
132 tab_snapshot,
133 wrap_snapshot,
134 block_snapshot,
135 text_highlights: self.text_highlights.clone(),
136 inlay_highlights: self.inlay_highlights.clone(),
137 clip_at_line_ends: self.clip_at_line_ends,
138 }
139 }
140
141 pub fn set_state(&mut self, other: &DisplaySnapshot, cx: &mut ModelContext<Self>) {
142 self.fold(
143 other
144 .folds_in_range(0..other.buffer_snapshot.len())
145 .map(|fold| fold.range.to_offset(&other.buffer_snapshot)),
146 cx,
147 );
148 }
149
150 pub fn fold<T: ToOffset>(
151 &mut self,
152 ranges: impl IntoIterator<Item = Range<T>>,
153 cx: &mut ModelContext<Self>,
154 ) {
155 let snapshot = self.buffer.read(cx).snapshot(cx);
156 let edits = self.buffer_subscription.consume().into_inner();
157 let tab_size = Self::tab_size(&self.buffer, cx);
158 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
159 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
160 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
161 let (snapshot, edits) = self
162 .wrap_map
163 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
164 self.block_map.read(snapshot, edits);
165 let (snapshot, edits) = fold_map.fold(ranges);
166 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
167 let (snapshot, edits) = self
168 .wrap_map
169 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
170 self.block_map.read(snapshot, edits);
171 }
172
173 pub fn unfold<T: ToOffset>(
174 &mut self,
175 ranges: impl IntoIterator<Item = Range<T>>,
176 inclusive: bool,
177 cx: &mut ModelContext<Self>,
178 ) {
179 let snapshot = self.buffer.read(cx).snapshot(cx);
180 let edits = self.buffer_subscription.consume().into_inner();
181 let tab_size = Self::tab_size(&self.buffer, cx);
182 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
183 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
184 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
185 let (snapshot, edits) = self
186 .wrap_map
187 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
188 self.block_map.read(snapshot, edits);
189 let (snapshot, edits) = fold_map.unfold(ranges, inclusive);
190 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
191 let (snapshot, edits) = self
192 .wrap_map
193 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
194 self.block_map.read(snapshot, edits);
195 }
196
197 pub fn insert_blocks(
198 &mut self,
199 blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
200 cx: &mut ModelContext<Self>,
201 ) -> Vec<BlockId> {
202 let snapshot = self.buffer.read(cx).snapshot(cx);
203 let edits = self.buffer_subscription.consume().into_inner();
204 let tab_size = Self::tab_size(&self.buffer, cx);
205 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
206 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
207 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
208 let (snapshot, edits) = self
209 .wrap_map
210 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
211 let mut block_map = self.block_map.write(snapshot, edits);
212 block_map.insert(blocks)
213 }
214
215 pub fn replace_blocks(&mut self, styles: HashMap<BlockId, RenderBlock>) {
216 self.block_map.replace(styles);
217 }
218
219 pub fn remove_blocks(&mut self, ids: HashSet<BlockId>, cx: &mut ModelContext<Self>) {
220 let snapshot = self.buffer.read(cx).snapshot(cx);
221 let edits = self.buffer_subscription.consume().into_inner();
222 let tab_size = Self::tab_size(&self.buffer, cx);
223 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
224 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
225 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
226 let (snapshot, edits) = self
227 .wrap_map
228 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
229 let mut block_map = self.block_map.write(snapshot, edits);
230 block_map.remove(ids);
231 }
232
233 pub fn highlight_text(
234 &mut self,
235 type_id: TypeId,
236 ranges: Vec<Range<Anchor>>,
237 style: HighlightStyle,
238 ) {
239 self.text_highlights
240 .insert(Some(type_id), Arc::new((style, ranges)));
241 }
242
243 pub(crate) fn highlight_inlays(
244 &mut self,
245 type_id: TypeId,
246 highlights: Vec<InlayHighlight>,
247 style: HighlightStyle,
248 ) {
249 for highlight in highlights {
250 self.inlay_highlights
251 .entry(type_id)
252 .or_default()
253 .insert(highlight.inlay, (style, highlight));
254 }
255 }
256
257 pub fn text_highlights(&self, type_id: TypeId) -> Option<(HighlightStyle, &[Range<Anchor>])> {
258 let highlights = self.text_highlights.get(&Some(type_id))?;
259 Some((highlights.0, &highlights.1))
260 }
261 pub fn clear_highlights(&mut self, type_id: TypeId) -> bool {
262 let mut cleared = self.text_highlights.remove(&Some(type_id)).is_some();
263 cleared |= self.inlay_highlights.remove(&type_id).is_some();
264 cleared
265 }
266
267 pub fn set_font(&self, font: Font, font_size: Pixels, cx: &mut ModelContext<Self>) -> bool {
268 self.wrap_map
269 .update(cx, |map, cx| map.set_font_with_size(font, font_size, cx))
270 }
271
272 pub fn set_fold_ellipses_color(&mut self, color: Hsla) -> bool {
273 self.fold_map.set_ellipses_color(color)
274 }
275
276 pub fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut ModelContext<Self>) -> bool {
277 self.wrap_map
278 .update(cx, |map, cx| map.set_wrap_width(width, cx))
279 }
280
281 pub(crate) fn current_inlays(&self) -> impl Iterator<Item = &Inlay> {
282 self.inlay_map.current_inlays()
283 }
284
285 pub(crate) fn splice_inlays(
286 &mut self,
287 to_remove: Vec<InlayId>,
288 to_insert: Vec<Inlay>,
289 cx: &mut ModelContext<Self>,
290 ) {
291 if to_remove.is_empty() && to_insert.is_empty() {
292 return;
293 }
294 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
295 let edits = self.buffer_subscription.consume().into_inner();
296 let (snapshot, edits) = self.inlay_map.sync(buffer_snapshot, edits);
297 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
298 let tab_size = Self::tab_size(&self.buffer, cx);
299 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
300 let (snapshot, edits) = self
301 .wrap_map
302 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
303 self.block_map.read(snapshot, edits);
304
305 let (snapshot, edits) = self.inlay_map.splice(to_remove, to_insert);
306 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
307 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
308 let (snapshot, edits) = self
309 .wrap_map
310 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
311 self.block_map.read(snapshot, edits);
312 }
313
314 fn tab_size(buffer: &Model<MultiBuffer>, cx: &mut ModelContext<Self>) -> NonZeroU32 {
315 let language = buffer
316 .read(cx)
317 .as_singleton()
318 .and_then(|buffer| buffer.read(cx).language());
319 language_settings(language.as_deref(), None, cx).tab_size
320 }
321
322 #[cfg(test)]
323 pub fn is_rewrapping(&self, cx: &gpui::AppContext) -> bool {
324 self.wrap_map.read(cx).is_rewrapping()
325 }
326}
327
328#[derive(Debug, Default)]
329pub(crate) struct Highlights<'a> {
330 pub text_highlights: Option<&'a TextHighlights>,
331 pub inlay_highlights: Option<&'a InlayHighlights>,
332 pub inlay_highlight_style: Option<HighlightStyle>,
333 pub suggestion_highlight_style: Option<HighlightStyle>,
334}
335
336pub struct HighlightedChunk<'a> {
337 pub chunk: &'a str,
338 pub style: Option<HighlightStyle>,
339 pub is_tab: bool,
340}
341
342pub struct DisplaySnapshot {
343 pub buffer_snapshot: MultiBufferSnapshot,
344 pub fold_snapshot: fold_map::FoldSnapshot,
345 inlay_snapshot: inlay_map::InlaySnapshot,
346 tab_snapshot: tab_map::TabSnapshot,
347 wrap_snapshot: wrap_map::WrapSnapshot,
348 block_snapshot: block_map::BlockSnapshot,
349 text_highlights: TextHighlights,
350 inlay_highlights: InlayHighlights,
351 clip_at_line_ends: bool,
352}
353
354impl DisplaySnapshot {
355 #[cfg(test)]
356 pub fn fold_count(&self) -> usize {
357 self.fold_snapshot.fold_count()
358 }
359
360 pub fn is_empty(&self) -> bool {
361 self.buffer_snapshot.len() == 0
362 }
363
364 pub fn buffer_rows(&self, start_row: u32) -> DisplayBufferRows {
365 self.block_snapshot.buffer_rows(start_row)
366 }
367
368 pub fn max_buffer_row(&self) -> u32 {
369 self.buffer_snapshot.max_buffer_row()
370 }
371
372 pub fn prev_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
373 loop {
374 let mut inlay_point = self.inlay_snapshot.to_inlay_point(point);
375 let mut fold_point = self.fold_snapshot.to_fold_point(inlay_point, Bias::Left);
376 fold_point.0.column = 0;
377 inlay_point = fold_point.to_inlay_point(&self.fold_snapshot);
378 point = self.inlay_snapshot.to_buffer_point(inlay_point);
379
380 let mut display_point = self.point_to_display_point(point, Bias::Left);
381 *display_point.column_mut() = 0;
382 let next_point = self.display_point_to_point(display_point, Bias::Left);
383 if next_point == point {
384 return (point, display_point);
385 }
386 point = next_point;
387 }
388 }
389
390 pub fn next_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
391 loop {
392 let mut inlay_point = self.inlay_snapshot.to_inlay_point(point);
393 let mut fold_point = self.fold_snapshot.to_fold_point(inlay_point, Bias::Right);
394 fold_point.0.column = self.fold_snapshot.line_len(fold_point.row());
395 inlay_point = fold_point.to_inlay_point(&self.fold_snapshot);
396 point = self.inlay_snapshot.to_buffer_point(inlay_point);
397
398 let mut display_point = self.point_to_display_point(point, Bias::Right);
399 *display_point.column_mut() = self.line_len(display_point.row());
400 let next_point = self.display_point_to_point(display_point, Bias::Right);
401 if next_point == point {
402 return (point, display_point);
403 }
404 point = next_point;
405 }
406 }
407
408 // used by line_mode selections and tries to match vim behaviour
409 pub fn expand_to_line(&self, range: Range<Point>) -> Range<Point> {
410 let new_start = if range.start.row == 0 {
411 Point::new(0, 0)
412 } else if range.start.row == self.max_buffer_row()
413 || (range.end.column > 0 && range.end.row == self.max_buffer_row())
414 {
415 Point::new(range.start.row - 1, self.line_len(range.start.row - 1))
416 } else {
417 self.prev_line_boundary(range.start).0
418 };
419
420 let new_end = if range.end.column == 0 {
421 range.end
422 } else if range.end.row < self.max_buffer_row() {
423 self.buffer_snapshot
424 .clip_point(Point::new(range.end.row + 1, 0), Bias::Left)
425 } else {
426 self.buffer_snapshot.max_point()
427 };
428
429 new_start..new_end
430 }
431
432 fn point_to_display_point(&self, point: Point, bias: Bias) -> DisplayPoint {
433 let inlay_point = self.inlay_snapshot.to_inlay_point(point);
434 let fold_point = self.fold_snapshot.to_fold_point(inlay_point, bias);
435 let tab_point = self.tab_snapshot.to_tab_point(fold_point);
436 let wrap_point = self.wrap_snapshot.tab_point_to_wrap_point(tab_point);
437 let block_point = self.block_snapshot.to_block_point(wrap_point);
438 DisplayPoint(block_point)
439 }
440
441 fn display_point_to_point(&self, point: DisplayPoint, bias: Bias) -> Point {
442 self.inlay_snapshot
443 .to_buffer_point(self.display_point_to_inlay_point(point, bias))
444 }
445
446 pub fn display_point_to_inlay_offset(&self, point: DisplayPoint, bias: Bias) -> InlayOffset {
447 self.inlay_snapshot
448 .to_offset(self.display_point_to_inlay_point(point, bias))
449 }
450
451 pub fn anchor_to_inlay_offset(&self, anchor: Anchor) -> InlayOffset {
452 self.inlay_snapshot
453 .to_inlay_offset(anchor.to_offset(&self.buffer_snapshot))
454 }
455
456 fn display_point_to_inlay_point(&self, point: DisplayPoint, bias: Bias) -> InlayPoint {
457 let block_point = point.0;
458 let wrap_point = self.block_snapshot.to_wrap_point(block_point);
459 let tab_point = self.wrap_snapshot.to_tab_point(wrap_point);
460 let fold_point = self.tab_snapshot.to_fold_point(tab_point, bias).0;
461 fold_point.to_inlay_point(&self.fold_snapshot)
462 }
463
464 pub fn display_point_to_fold_point(&self, point: DisplayPoint, bias: Bias) -> FoldPoint {
465 let block_point = point.0;
466 let wrap_point = self.block_snapshot.to_wrap_point(block_point);
467 let tab_point = self.wrap_snapshot.to_tab_point(wrap_point);
468 self.tab_snapshot.to_fold_point(tab_point, bias).0
469 }
470
471 pub fn fold_point_to_display_point(&self, fold_point: FoldPoint) -> DisplayPoint {
472 let tab_point = self.tab_snapshot.to_tab_point(fold_point);
473 let wrap_point = self.wrap_snapshot.tab_point_to_wrap_point(tab_point);
474 let block_point = self.block_snapshot.to_block_point(wrap_point);
475 DisplayPoint(block_point)
476 }
477
478 pub fn max_point(&self) -> DisplayPoint {
479 DisplayPoint(self.block_snapshot.max_point())
480 }
481
482 /// Returns text chunks starting at the given display row until the end of the file
483 pub fn text_chunks(&self, display_row: u32) -> impl Iterator<Item = &str> {
484 self.block_snapshot
485 .chunks(
486 display_row..self.max_point().row() + 1,
487 false,
488 Highlights::default(),
489 )
490 .map(|h| h.text)
491 }
492
493 /// Returns text chunks starting at the end of the given display row in reverse until the start of the file
494 pub fn reverse_text_chunks(&self, display_row: u32) -> impl Iterator<Item = &str> {
495 (0..=display_row).into_iter().rev().flat_map(|row| {
496 self.block_snapshot
497 .chunks(row..row + 1, false, Highlights::default())
498 .map(|h| h.text)
499 .collect::<Vec<_>>()
500 .into_iter()
501 .rev()
502 })
503 }
504
505 pub fn chunks<'a>(
506 &'a self,
507 display_rows: Range<u32>,
508 language_aware: bool,
509 inlay_highlight_style: Option<HighlightStyle>,
510 suggestion_highlight_style: Option<HighlightStyle>,
511 ) -> DisplayChunks<'a> {
512 self.block_snapshot.chunks(
513 display_rows,
514 language_aware,
515 Highlights {
516 text_highlights: Some(&self.text_highlights),
517 inlay_highlights: Some(&self.inlay_highlights),
518 inlay_highlight_style,
519 suggestion_highlight_style,
520 },
521 )
522 }
523
524 pub fn highlighted_chunks<'a>(
525 &'a self,
526 display_rows: Range<u32>,
527 language_aware: bool,
528 editor_style: &'a EditorStyle,
529 ) -> impl Iterator<Item = HighlightedChunk<'a>> {
530 self.chunks(
531 display_rows,
532 language_aware,
533 Some(editor_style.inlays_style),
534 Some(editor_style.suggestions_style),
535 )
536 .map(|chunk| {
537 let mut highlight_style = chunk
538 .syntax_highlight_id
539 .and_then(|id| id.style(&editor_style.syntax));
540
541 if let Some(chunk_highlight) = chunk.highlight_style {
542 if let Some(highlight_style) = highlight_style.as_mut() {
543 highlight_style.highlight(chunk_highlight);
544 } else {
545 highlight_style = Some(chunk_highlight);
546 }
547 }
548
549 let mut diagnostic_highlight = HighlightStyle::default();
550
551 if chunk.is_unnecessary {
552 diagnostic_highlight.fade_out = Some(UNNECESSARY_CODE_FADE);
553 }
554
555 if let Some(severity) = chunk.diagnostic_severity {
556 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
557 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
558 let diagnostic_color =
559 super::diagnostic_style(severity, true, &editor_style.status);
560 diagnostic_highlight.underline = Some(UnderlineStyle {
561 color: Some(diagnostic_color),
562 thickness: 1.0.into(),
563 wavy: true,
564 });
565 }
566 }
567
568 if let Some(highlight_style) = highlight_style.as_mut() {
569 highlight_style.highlight(diagnostic_highlight);
570 } else {
571 highlight_style = Some(diagnostic_highlight);
572 }
573
574 HighlightedChunk {
575 chunk: chunk.text,
576 style: highlight_style,
577 is_tab: chunk.is_tab,
578 }
579 })
580 }
581
582 pub fn layout_row(
583 &self,
584 display_row: u32,
585 TextLayoutDetails {
586 text_system,
587 editor_style,
588 rem_size,
589 }: &TextLayoutDetails,
590 ) -> Arc<LineLayout> {
591 let mut runs = Vec::new();
592 let mut line = String::new();
593
594 let range = display_row..display_row + 1;
595 for chunk in self.highlighted_chunks(range, false, &editor_style) {
596 line.push_str(chunk.chunk);
597
598 let text_style = if let Some(style) = chunk.style {
599 Cow::Owned(editor_style.text.clone().highlight(style))
600 } else {
601 Cow::Borrowed(&editor_style.text)
602 };
603
604 runs.push(text_style.to_run(chunk.chunk.len()))
605 }
606
607 if line.ends_with('\n') {
608 line.pop();
609 if let Some(last_run) = runs.last_mut() {
610 last_run.len -= 1;
611 if last_run.len == 0 {
612 runs.pop();
613 }
614 }
615 }
616
617 let font_size = editor_style.text.font_size.to_pixels(*rem_size);
618 text_system
619 .layout_line(&line, font_size, &runs)
620 .expect("we expect the font to be loaded because it's rendered by the editor")
621 }
622
623 pub fn x_for_display_point(
624 &self,
625 display_point: DisplayPoint,
626 text_layout_details: &TextLayoutDetails,
627 ) -> Pixels {
628 let line = self.layout_row(display_point.row(), text_layout_details);
629 line.x_for_index(display_point.column() as usize)
630 }
631
632 pub fn display_column_for_x(
633 &self,
634 display_row: u32,
635 x: Pixels,
636 details: &TextLayoutDetails,
637 ) -> u32 {
638 let layout_line = self.layout_row(display_row, details);
639 layout_line.closest_index_for_x(x) as u32
640 }
641
642 pub fn chars_at(
643 &self,
644 mut point: DisplayPoint,
645 ) -> impl Iterator<Item = (char, DisplayPoint)> + '_ {
646 point = DisplayPoint(self.block_snapshot.clip_point(point.0, Bias::Left));
647 self.text_chunks(point.row())
648 .flat_map(str::chars)
649 .skip_while({
650 let mut column = 0;
651 move |char| {
652 let at_point = column >= point.column();
653 column += char.len_utf8() as u32;
654 !at_point
655 }
656 })
657 .map(move |ch| {
658 let result = (ch, point);
659 if ch == '\n' {
660 *point.row_mut() += 1;
661 *point.column_mut() = 0;
662 } else {
663 *point.column_mut() += ch.len_utf8() as u32;
664 }
665 result
666 })
667 }
668
669 pub fn reverse_chars_at(
670 &self,
671 mut point: DisplayPoint,
672 ) -> impl Iterator<Item = (char, DisplayPoint)> + '_ {
673 point = DisplayPoint(self.block_snapshot.clip_point(point.0, Bias::Left));
674 self.reverse_text_chunks(point.row())
675 .flat_map(|chunk| chunk.chars().rev())
676 .skip_while({
677 let mut column = self.line_len(point.row());
678 if self.max_point().row() > point.row() {
679 column += 1;
680 }
681
682 move |char| {
683 let at_point = column <= point.column();
684 column = column.saturating_sub(char.len_utf8() as u32);
685 !at_point
686 }
687 })
688 .map(move |ch| {
689 if ch == '\n' {
690 *point.row_mut() -= 1;
691 *point.column_mut() = self.line_len(point.row());
692 } else {
693 *point.column_mut() = point.column().saturating_sub(ch.len_utf8() as u32);
694 }
695 (ch, point)
696 })
697 }
698
699 pub fn column_to_chars(&self, display_row: u32, target: u32) -> u32 {
700 let mut count = 0;
701 let mut column = 0;
702 for (c, _) in self.chars_at(DisplayPoint::new(display_row, 0)) {
703 if column >= target {
704 break;
705 }
706 count += 1;
707 column += c.len_utf8() as u32;
708 }
709 count
710 }
711
712 pub fn column_from_chars(&self, display_row: u32, char_count: u32) -> u32 {
713 let mut column = 0;
714
715 for (count, (c, _)) in self.chars_at(DisplayPoint::new(display_row, 0)).enumerate() {
716 if c == '\n' || count >= char_count as usize {
717 break;
718 }
719 column += c.len_utf8() as u32;
720 }
721
722 column
723 }
724
725 pub fn clip_point(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
726 let mut clipped = self.block_snapshot.clip_point(point.0, bias);
727 if self.clip_at_line_ends {
728 clipped = self.clip_at_line_end(DisplayPoint(clipped)).0
729 }
730 DisplayPoint(clipped)
731 }
732
733 pub fn clip_at_line_end(&self, point: DisplayPoint) -> DisplayPoint {
734 let mut point = point.0;
735 if point.column == self.line_len(point.row) {
736 point.column = point.column.saturating_sub(1);
737 point = self.block_snapshot.clip_point(point, Bias::Left);
738 }
739 DisplayPoint(point)
740 }
741
742 pub fn folds_in_range<T>(&self, range: Range<T>) -> impl Iterator<Item = &Fold>
743 where
744 T: ToOffset,
745 {
746 self.fold_snapshot.folds_in_range(range)
747 }
748
749 pub fn blocks_in_range(
750 &self,
751 rows: Range<u32>,
752 ) -> impl Iterator<Item = (u32, &TransformBlock)> {
753 self.block_snapshot.blocks_in_range(rows)
754 }
755
756 pub fn intersects_fold<T: ToOffset>(&self, offset: T) -> bool {
757 self.fold_snapshot.intersects_fold(offset)
758 }
759
760 pub fn is_line_folded(&self, buffer_row: u32) -> bool {
761 self.fold_snapshot.is_line_folded(buffer_row)
762 }
763
764 pub fn is_block_line(&self, display_row: u32) -> bool {
765 self.block_snapshot.is_block_line(display_row)
766 }
767
768 pub fn soft_wrap_indent(&self, display_row: u32) -> Option<u32> {
769 let wrap_row = self
770 .block_snapshot
771 .to_wrap_point(BlockPoint::new(display_row, 0))
772 .row();
773 self.wrap_snapshot.soft_wrap_indent(wrap_row)
774 }
775
776 pub fn text(&self) -> String {
777 self.text_chunks(0).collect()
778 }
779
780 pub fn line(&self, display_row: u32) -> String {
781 let mut result = String::new();
782 for chunk in self.text_chunks(display_row) {
783 if let Some(ix) = chunk.find('\n') {
784 result.push_str(&chunk[0..ix]);
785 break;
786 } else {
787 result.push_str(chunk);
788 }
789 }
790 result
791 }
792
793 pub fn line_indent(&self, display_row: u32) -> (u32, bool) {
794 let mut indent = 0;
795 let mut is_blank = true;
796 for (c, _) in self.chars_at(DisplayPoint::new(display_row, 0)) {
797 if c == ' ' {
798 indent += 1;
799 } else {
800 is_blank = c == '\n';
801 break;
802 }
803 }
804 (indent, is_blank)
805 }
806
807 pub fn line_indent_for_buffer_row(&self, buffer_row: u32) -> (u32, bool) {
808 let (buffer, range) = self
809 .buffer_snapshot
810 .buffer_line_for_row(buffer_row)
811 .unwrap();
812
813 let mut indent_size = 0;
814 let mut is_blank = false;
815 for c in buffer.chars_at(Point::new(range.start.row, 0)) {
816 if c == ' ' || c == '\t' {
817 indent_size += 1;
818 } else {
819 if c == '\n' {
820 is_blank = true;
821 }
822 break;
823 }
824 }
825
826 (indent_size, is_blank)
827 }
828
829 pub fn line_len(&self, row: u32) -> u32 {
830 self.block_snapshot.line_len(row)
831 }
832
833 pub fn longest_row(&self) -> u32 {
834 self.block_snapshot.longest_row()
835 }
836
837 pub fn fold_for_line(self: &Self, buffer_row: u32) -> Option<FoldStatus> {
838 if self.is_line_folded(buffer_row) {
839 Some(FoldStatus::Folded)
840 } else if self.is_foldable(buffer_row) {
841 Some(FoldStatus::Foldable)
842 } else {
843 None
844 }
845 }
846
847 pub fn is_foldable(self: &Self, buffer_row: u32) -> bool {
848 let max_row = self.buffer_snapshot.max_buffer_row();
849 if buffer_row >= max_row {
850 return false;
851 }
852
853 let (indent_size, is_blank) = self.line_indent_for_buffer_row(buffer_row);
854 if is_blank {
855 return false;
856 }
857
858 for next_row in (buffer_row + 1)..=max_row {
859 let (next_indent_size, next_line_is_blank) = self.line_indent_for_buffer_row(next_row);
860 if next_indent_size > indent_size {
861 return true;
862 } else if !next_line_is_blank {
863 break;
864 }
865 }
866
867 false
868 }
869
870 pub fn foldable_range(self: &Self, buffer_row: u32) -> Option<Range<Point>> {
871 let start = Point::new(buffer_row, self.buffer_snapshot.line_len(buffer_row));
872 if self.is_foldable(start.row) && !self.is_line_folded(start.row) {
873 let (start_indent, _) = self.line_indent_for_buffer_row(buffer_row);
874 let max_point = self.buffer_snapshot.max_point();
875 let mut end = None;
876
877 for row in (buffer_row + 1)..=max_point.row {
878 let (indent, is_blank) = self.line_indent_for_buffer_row(row);
879 if !is_blank && indent <= start_indent {
880 let prev_row = row - 1;
881 end = Some(Point::new(
882 prev_row,
883 self.buffer_snapshot.line_len(prev_row),
884 ));
885 break;
886 }
887 }
888 let end = end.unwrap_or(max_point);
889 Some(start..end)
890 } else {
891 None
892 }
893 }
894
895 #[cfg(any(test, feature = "test-support"))]
896 pub fn text_highlight_ranges<Tag: ?Sized + 'static>(
897 &self,
898 ) -> Option<Arc<(HighlightStyle, Vec<Range<Anchor>>)>> {
899 let type_id = TypeId::of::<Tag>();
900 self.text_highlights.get(&Some(type_id)).cloned()
901 }
902
903 #[allow(unused)]
904 #[cfg(any(test, feature = "test-support"))]
905 pub(crate) fn inlay_highlights<Tag: ?Sized + 'static>(
906 &self,
907 ) -> Option<&HashMap<InlayId, (HighlightStyle, InlayHighlight)>> {
908 let type_id = TypeId::of::<Tag>();
909 self.inlay_highlights.get(&type_id)
910 }
911}
912
913#[derive(Copy, Clone, Default, Eq, Ord, PartialOrd, PartialEq)]
914pub struct DisplayPoint(BlockPoint);
915
916impl Debug for DisplayPoint {
917 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
918 f.write_fmt(format_args!(
919 "DisplayPoint({}, {})",
920 self.row(),
921 self.column()
922 ))
923 }
924}
925
926impl DisplayPoint {
927 pub fn new(row: u32, column: u32) -> Self {
928 Self(BlockPoint(Point::new(row, column)))
929 }
930
931 pub fn zero() -> Self {
932 Self::new(0, 0)
933 }
934
935 pub fn is_zero(&self) -> bool {
936 self.0.is_zero()
937 }
938
939 pub fn row(self) -> u32 {
940 self.0.row
941 }
942
943 pub fn column(self) -> u32 {
944 self.0.column
945 }
946
947 pub fn row_mut(&mut self) -> &mut u32 {
948 &mut self.0.row
949 }
950
951 pub fn column_mut(&mut self) -> &mut u32 {
952 &mut self.0.column
953 }
954
955 pub fn to_point(self, map: &DisplaySnapshot) -> Point {
956 map.display_point_to_point(self, Bias::Left)
957 }
958
959 pub fn to_offset(self, map: &DisplaySnapshot, bias: Bias) -> usize {
960 let wrap_point = map.block_snapshot.to_wrap_point(self.0);
961 let tab_point = map.wrap_snapshot.to_tab_point(wrap_point);
962 let fold_point = map.tab_snapshot.to_fold_point(tab_point, bias).0;
963 let inlay_point = fold_point.to_inlay_point(&map.fold_snapshot);
964 map.inlay_snapshot
965 .to_buffer_offset(map.inlay_snapshot.to_offset(inlay_point))
966 }
967}
968
969impl ToDisplayPoint for usize {
970 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
971 map.point_to_display_point(self.to_point(&map.buffer_snapshot), Bias::Left)
972 }
973}
974
975impl ToDisplayPoint for OffsetUtf16 {
976 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
977 self.to_offset(&map.buffer_snapshot).to_display_point(map)
978 }
979}
980
981impl ToDisplayPoint for Point {
982 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
983 map.point_to_display_point(*self, Bias::Left)
984 }
985}
986
987impl ToDisplayPoint for Anchor {
988 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
989 self.to_point(&map.buffer_snapshot).to_display_point(map)
990 }
991}
992
993#[cfg(test)]
994pub mod tests {
995 use super::*;
996 use crate::{
997 movement,
998 test::{editor_test_context::EditorTestContext, marked_display_snapshot},
999 };
1000 use gpui::{div, font, observe, px, AppContext, Context, Element, Hsla};
1001 use language::{
1002 language_settings::{AllLanguageSettings, AllLanguageSettingsContent},
1003 Buffer, Language, LanguageConfig, SelectionGoal,
1004 };
1005 use project::Project;
1006 use rand::{prelude::*, Rng};
1007 use settings::SettingsStore;
1008 use smol::stream::StreamExt;
1009 use std::{env, sync::Arc};
1010 use theme::{LoadThemes, SyntaxTheme};
1011 use util::test::{marked_text_ranges, sample_text};
1012 use Bias::*;
1013
1014 #[gpui::test(iterations = 100)]
1015 async fn test_random_display_map(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
1016 cx.background_executor.set_block_on_ticks(0..=50);
1017 let operations = env::var("OPERATIONS")
1018 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
1019 .unwrap_or(10);
1020
1021 let mut tab_size = rng.gen_range(1..=4);
1022 let buffer_start_excerpt_header_height = rng.gen_range(1..=5);
1023 let excerpt_header_height = rng.gen_range(1..=5);
1024 let font_size = px(14.0);
1025 let max_wrap_width = 300.0;
1026 let mut wrap_width = if rng.gen_bool(0.1) {
1027 None
1028 } else {
1029 Some(px(rng.gen_range(0.0..=max_wrap_width)))
1030 };
1031
1032 log::info!("tab size: {}", tab_size);
1033 log::info!("wrap width: {:?}", wrap_width);
1034
1035 cx.update(|cx| {
1036 init_test(cx, |s| s.defaults.tab_size = NonZeroU32::new(tab_size));
1037 });
1038
1039 let buffer = cx.update(|cx| {
1040 if rng.gen() {
1041 let len = rng.gen_range(0..10);
1042 let text = util::RandomCharIter::new(&mut rng)
1043 .take(len)
1044 .collect::<String>();
1045 MultiBuffer::build_simple(&text, cx)
1046 } else {
1047 MultiBuffer::build_random(&mut rng, cx)
1048 }
1049 });
1050
1051 let map = cx.new_model(|cx| {
1052 DisplayMap::new(
1053 buffer.clone(),
1054 font("Helvetica"),
1055 font_size,
1056 wrap_width,
1057 buffer_start_excerpt_header_height,
1058 excerpt_header_height,
1059 cx,
1060 )
1061 });
1062 let mut notifications = observe(&map, cx);
1063 let mut fold_count = 0;
1064 let mut blocks = Vec::new();
1065
1066 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1067 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
1068 log::info!("fold text: {:?}", snapshot.fold_snapshot.text());
1069 log::info!("tab text: {:?}", snapshot.tab_snapshot.text());
1070 log::info!("wrap text: {:?}", snapshot.wrap_snapshot.text());
1071 log::info!("block text: {:?}", snapshot.block_snapshot.text());
1072 log::info!("display text: {:?}", snapshot.text());
1073
1074 for _i in 0..operations {
1075 match rng.gen_range(0..100) {
1076 0..=19 => {
1077 wrap_width = if rng.gen_bool(0.2) {
1078 None
1079 } else {
1080 Some(px(rng.gen_range(0.0..=max_wrap_width)))
1081 };
1082 log::info!("setting wrap width to {:?}", wrap_width);
1083 map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
1084 }
1085 20..=29 => {
1086 let mut tab_sizes = vec![1, 2, 3, 4];
1087 tab_sizes.remove((tab_size - 1) as usize);
1088 tab_size = *tab_sizes.choose(&mut rng).unwrap();
1089 log::info!("setting tab size to {:?}", tab_size);
1090 cx.update(|cx| {
1091 cx.update_global::<SettingsStore, _>(|store, cx| {
1092 store.update_user_settings::<AllLanguageSettings>(cx, |s| {
1093 s.defaults.tab_size = NonZeroU32::new(tab_size);
1094 });
1095 });
1096 });
1097 }
1098 30..=44 => {
1099 map.update(cx, |map, cx| {
1100 if rng.gen() || blocks.is_empty() {
1101 let buffer = map.snapshot(cx).buffer_snapshot;
1102 let block_properties = (0..rng.gen_range(1..=1))
1103 .map(|_| {
1104 let position =
1105 buffer.anchor_after(buffer.clip_offset(
1106 rng.gen_range(0..=buffer.len()),
1107 Bias::Left,
1108 ));
1109
1110 let disposition = if rng.gen() {
1111 BlockDisposition::Above
1112 } else {
1113 BlockDisposition::Below
1114 };
1115 let height = rng.gen_range(1..5);
1116 log::info!(
1117 "inserting block {:?} {:?} with height {}",
1118 disposition,
1119 position.to_point(&buffer),
1120 height
1121 );
1122 BlockProperties {
1123 style: BlockStyle::Fixed,
1124 position,
1125 height,
1126 disposition,
1127 render: Arc::new(|_| div().into_any()),
1128 }
1129 })
1130 .collect::<Vec<_>>();
1131 blocks.extend(map.insert_blocks(block_properties, cx));
1132 } else {
1133 blocks.shuffle(&mut rng);
1134 let remove_count = rng.gen_range(1..=4.min(blocks.len()));
1135 let block_ids_to_remove = (0..remove_count)
1136 .map(|_| blocks.remove(rng.gen_range(0..blocks.len())))
1137 .collect();
1138 log::info!("removing block ids {:?}", block_ids_to_remove);
1139 map.remove_blocks(block_ids_to_remove, cx);
1140 }
1141 });
1142 }
1143 45..=79 => {
1144 let mut ranges = Vec::new();
1145 for _ in 0..rng.gen_range(1..=3) {
1146 buffer.read_with(cx, |buffer, cx| {
1147 let buffer = buffer.read(cx);
1148 let end = buffer.clip_offset(rng.gen_range(0..=buffer.len()), Right);
1149 let start = buffer.clip_offset(rng.gen_range(0..=end), Left);
1150 ranges.push(start..end);
1151 });
1152 }
1153
1154 if rng.gen() && fold_count > 0 {
1155 log::info!("unfolding ranges: {:?}", ranges);
1156 map.update(cx, |map, cx| {
1157 map.unfold(ranges, true, cx);
1158 });
1159 } else {
1160 log::info!("folding ranges: {:?}", ranges);
1161 map.update(cx, |map, cx| {
1162 map.fold(ranges, cx);
1163 });
1164 }
1165 }
1166 _ => {
1167 buffer.update(cx, |buffer, cx| buffer.randomly_mutate(&mut rng, 5, cx));
1168 }
1169 }
1170
1171 if map.read_with(cx, |map, cx| map.is_rewrapping(cx)) {
1172 notifications.next().await.unwrap();
1173 }
1174
1175 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1176 fold_count = snapshot.fold_count();
1177 log::info!("buffer text: {:?}", snapshot.buffer_snapshot.text());
1178 log::info!("fold text: {:?}", snapshot.fold_snapshot.text());
1179 log::info!("tab text: {:?}", snapshot.tab_snapshot.text());
1180 log::info!("wrap text: {:?}", snapshot.wrap_snapshot.text());
1181 log::info!("block text: {:?}", snapshot.block_snapshot.text());
1182 log::info!("display text: {:?}", snapshot.text());
1183
1184 // Line boundaries
1185 let buffer = &snapshot.buffer_snapshot;
1186 for _ in 0..5 {
1187 let row = rng.gen_range(0..=buffer.max_point().row);
1188 let column = rng.gen_range(0..=buffer.line_len(row));
1189 let point = buffer.clip_point(Point::new(row, column), Left);
1190
1191 let (prev_buffer_bound, prev_display_bound) = snapshot.prev_line_boundary(point);
1192 let (next_buffer_bound, next_display_bound) = snapshot.next_line_boundary(point);
1193
1194 assert!(prev_buffer_bound <= point);
1195 assert!(next_buffer_bound >= point);
1196 assert_eq!(prev_buffer_bound.column, 0);
1197 assert_eq!(prev_display_bound.column(), 0);
1198 if next_buffer_bound < buffer.max_point() {
1199 assert_eq!(buffer.chars_at(next_buffer_bound).next(), Some('\n'));
1200 }
1201
1202 assert_eq!(
1203 prev_display_bound,
1204 prev_buffer_bound.to_display_point(&snapshot),
1205 "row boundary before {:?}. reported buffer row boundary: {:?}",
1206 point,
1207 prev_buffer_bound
1208 );
1209 assert_eq!(
1210 next_display_bound,
1211 next_buffer_bound.to_display_point(&snapshot),
1212 "display row boundary after {:?}. reported buffer row boundary: {:?}",
1213 point,
1214 next_buffer_bound
1215 );
1216 assert_eq!(
1217 prev_buffer_bound,
1218 prev_display_bound.to_point(&snapshot),
1219 "row boundary before {:?}. reported display row boundary: {:?}",
1220 point,
1221 prev_display_bound
1222 );
1223 assert_eq!(
1224 next_buffer_bound,
1225 next_display_bound.to_point(&snapshot),
1226 "row boundary after {:?}. reported display row boundary: {:?}",
1227 point,
1228 next_display_bound
1229 );
1230 }
1231
1232 // Movement
1233 let min_point = snapshot.clip_point(DisplayPoint::new(0, 0), Left);
1234 let max_point = snapshot.clip_point(snapshot.max_point(), Right);
1235 for _ in 0..5 {
1236 let row = rng.gen_range(0..=snapshot.max_point().row());
1237 let column = rng.gen_range(0..=snapshot.line_len(row));
1238 let point = snapshot.clip_point(DisplayPoint::new(row, column), Left);
1239
1240 log::info!("Moving from point {:?}", point);
1241
1242 let moved_right = movement::right(&snapshot, point);
1243 log::info!("Right {:?}", moved_right);
1244 if point < max_point {
1245 assert!(moved_right > point);
1246 if point.column() == snapshot.line_len(point.row())
1247 || snapshot.soft_wrap_indent(point.row()).is_some()
1248 && point.column() == snapshot.line_len(point.row()) - 1
1249 {
1250 assert!(moved_right.row() > point.row());
1251 }
1252 } else {
1253 assert_eq!(moved_right, point);
1254 }
1255
1256 let moved_left = movement::left(&snapshot, point);
1257 log::info!("Left {:?}", moved_left);
1258 if point > min_point {
1259 assert!(moved_left < point);
1260 if point.column() == 0 {
1261 assert!(moved_left.row() < point.row());
1262 }
1263 } else {
1264 assert_eq!(moved_left, point);
1265 }
1266 }
1267 }
1268 }
1269
1270 #[gpui::test(retries = 5)]
1271 async fn test_soft_wraps(cx: &mut gpui::TestAppContext) {
1272 cx.background_executor
1273 .set_block_on_ticks(usize::MAX..=usize::MAX);
1274 cx.update(|cx| {
1275 init_test(cx, |_| {});
1276 });
1277
1278 let mut cx = EditorTestContext::new(cx).await;
1279 let editor = cx.editor.clone();
1280 let window = cx.window.clone();
1281
1282 _ = cx.update_window(window, |_, cx| {
1283 let text_layout_details =
1284 editor.update(cx, |editor, cx| editor.text_layout_details(cx));
1285
1286 let font_size = px(12.0);
1287 let wrap_width = Some(px(64.));
1288
1289 let text = "one two three four five\nsix seven eight";
1290 let buffer = MultiBuffer::build_simple(text, cx);
1291 let map = cx.new_model(|cx| {
1292 DisplayMap::new(
1293 buffer.clone(),
1294 font("Helvetica"),
1295 font_size,
1296 wrap_width,
1297 1,
1298 1,
1299 cx,
1300 )
1301 });
1302
1303 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1304 assert_eq!(
1305 snapshot.text_chunks(0).collect::<String>(),
1306 "one two \nthree four \nfive\nsix seven \neight"
1307 );
1308 assert_eq!(
1309 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Left),
1310 DisplayPoint::new(0, 7)
1311 );
1312 assert_eq!(
1313 snapshot.clip_point(DisplayPoint::new(0, 8), Bias::Right),
1314 DisplayPoint::new(1, 0)
1315 );
1316 assert_eq!(
1317 movement::right(&snapshot, DisplayPoint::new(0, 7)),
1318 DisplayPoint::new(1, 0)
1319 );
1320 assert_eq!(
1321 movement::left(&snapshot, DisplayPoint::new(1, 0)),
1322 DisplayPoint::new(0, 7)
1323 );
1324
1325 let x = snapshot.x_for_display_point(DisplayPoint::new(1, 10), &text_layout_details);
1326 assert_eq!(
1327 movement::up(
1328 &snapshot,
1329 DisplayPoint::new(1, 10),
1330 SelectionGoal::None,
1331 false,
1332 &text_layout_details,
1333 ),
1334 (
1335 DisplayPoint::new(0, 7),
1336 SelectionGoal::HorizontalPosition(x.0)
1337 )
1338 );
1339 assert_eq!(
1340 movement::down(
1341 &snapshot,
1342 DisplayPoint::new(0, 7),
1343 SelectionGoal::HorizontalPosition(x.0),
1344 false,
1345 &text_layout_details
1346 ),
1347 (
1348 DisplayPoint::new(1, 10),
1349 SelectionGoal::HorizontalPosition(x.0)
1350 )
1351 );
1352 assert_eq!(
1353 movement::down(
1354 &snapshot,
1355 DisplayPoint::new(1, 10),
1356 SelectionGoal::HorizontalPosition(x.0),
1357 false,
1358 &text_layout_details
1359 ),
1360 (
1361 DisplayPoint::new(2, 4),
1362 SelectionGoal::HorizontalPosition(x.0)
1363 )
1364 );
1365
1366 let ix = snapshot.buffer_snapshot.text().find("seven").unwrap();
1367 buffer.update(cx, |buffer, cx| {
1368 buffer.edit([(ix..ix, "and ")], None, cx);
1369 });
1370
1371 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1372 assert_eq!(
1373 snapshot.text_chunks(1).collect::<String>(),
1374 "three four \nfive\nsix and \nseven eight"
1375 );
1376
1377 // Re-wrap on font size changes
1378 map.update(cx, |map, cx| {
1379 map.set_font(font("Helvetica"), px(font_size.0 + 3.), cx)
1380 });
1381
1382 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1383 assert_eq!(
1384 snapshot.text_chunks(1).collect::<String>(),
1385 "three \nfour five\nsix and \nseven \neight"
1386 )
1387 });
1388 }
1389
1390 #[gpui::test]
1391 fn test_text_chunks(cx: &mut gpui::AppContext) {
1392 init_test(cx, |_| {});
1393
1394 let text = sample_text(6, 6, 'a');
1395 let buffer = MultiBuffer::build_simple(&text, cx);
1396
1397 let font_size = px(14.0);
1398 let map = cx.new_model(|cx| {
1399 DisplayMap::new(buffer.clone(), font("Helvetica"), font_size, None, 1, 1, cx)
1400 });
1401
1402 buffer.update(cx, |buffer, cx| {
1403 buffer.edit(
1404 vec![
1405 (Point::new(1, 0)..Point::new(1, 0), "\t"),
1406 (Point::new(1, 1)..Point::new(1, 1), "\t"),
1407 (Point::new(2, 1)..Point::new(2, 1), "\t"),
1408 ],
1409 None,
1410 cx,
1411 )
1412 });
1413
1414 assert_eq!(
1415 map.update(cx, |map, cx| map.snapshot(cx))
1416 .text_chunks(1)
1417 .collect::<String>()
1418 .lines()
1419 .next(),
1420 Some(" b bbbbb")
1421 );
1422 assert_eq!(
1423 map.update(cx, |map, cx| map.snapshot(cx))
1424 .text_chunks(2)
1425 .collect::<String>()
1426 .lines()
1427 .next(),
1428 Some("c ccccc")
1429 );
1430 }
1431
1432 #[gpui::test]
1433 async fn test_chunks(cx: &mut gpui::TestAppContext) {
1434 use unindent::Unindent as _;
1435
1436 let text = r#"
1437 fn outer() {}
1438
1439 mod module {
1440 fn inner() {}
1441 }"#
1442 .unindent();
1443
1444 let theme = SyntaxTheme::new_test(vec![
1445 ("mod.body", Hsla::red().into()),
1446 ("fn.name", Hsla::blue().into()),
1447 ]);
1448 let language = Arc::new(
1449 Language::new(
1450 LanguageConfig {
1451 name: "Test".into(),
1452 path_suffixes: vec![".test".to_string()],
1453 ..Default::default()
1454 },
1455 Some(tree_sitter_rust::language()),
1456 )
1457 .with_highlights_query(
1458 r#"
1459 (mod_item name: (identifier) body: _ @mod.body)
1460 (function_item name: (identifier) @fn.name)
1461 "#,
1462 )
1463 .unwrap(),
1464 );
1465 language.set_theme(&theme);
1466
1467 cx.update(|cx| init_test(cx, |s| s.defaults.tab_size = Some(2.try_into().unwrap())));
1468
1469 let buffer = cx.new_model(|cx| {
1470 Buffer::new(0, cx.entity_id().as_u64(), text).with_language(language, cx)
1471 });
1472 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
1473 let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
1474
1475 let font_size = px(14.0);
1476
1477 let map = cx
1478 .new_model(|cx| DisplayMap::new(buffer, font("Helvetica"), font_size, None, 1, 1, cx));
1479 assert_eq!(
1480 cx.update(|cx| syntax_chunks(0..5, &map, &theme, cx)),
1481 vec![
1482 ("fn ".to_string(), None),
1483 ("outer".to_string(), Some(Hsla::blue())),
1484 ("() {}\n\nmod module ".to_string(), None),
1485 ("{\n fn ".to_string(), Some(Hsla::red())),
1486 ("inner".to_string(), Some(Hsla::blue())),
1487 ("() {}\n}".to_string(), Some(Hsla::red())),
1488 ]
1489 );
1490 assert_eq!(
1491 cx.update(|cx| syntax_chunks(3..5, &map, &theme, cx)),
1492 vec![
1493 (" fn ".to_string(), Some(Hsla::red())),
1494 ("inner".to_string(), Some(Hsla::blue())),
1495 ("() {}\n}".to_string(), Some(Hsla::red())),
1496 ]
1497 );
1498
1499 map.update(cx, |map, cx| {
1500 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
1501 });
1502 assert_eq!(
1503 cx.update(|cx| syntax_chunks(0..2, &map, &theme, cx)),
1504 vec![
1505 ("fn ".to_string(), None),
1506 ("out".to_string(), Some(Hsla::blue())),
1507 ("āÆ".to_string(), None),
1508 (" fn ".to_string(), Some(Hsla::red())),
1509 ("inner".to_string(), Some(Hsla::blue())),
1510 ("() {}\n}".to_string(), Some(Hsla::red())),
1511 ]
1512 );
1513 }
1514
1515 #[gpui::test]
1516 async fn test_chunks_with_soft_wrapping(cx: &mut gpui::TestAppContext) {
1517 use unindent::Unindent as _;
1518
1519 cx.background_executor
1520 .set_block_on_ticks(usize::MAX..=usize::MAX);
1521
1522 let text = r#"
1523 fn outer() {}
1524
1525 mod module {
1526 fn inner() {}
1527 }"#
1528 .unindent();
1529
1530 let theme = SyntaxTheme::new_test(vec![
1531 ("mod.body", Hsla::red().into()),
1532 ("fn.name", Hsla::blue().into()),
1533 ]);
1534 let language = Arc::new(
1535 Language::new(
1536 LanguageConfig {
1537 name: "Test".into(),
1538 path_suffixes: vec![".test".to_string()],
1539 ..Default::default()
1540 },
1541 Some(tree_sitter_rust::language()),
1542 )
1543 .with_highlights_query(
1544 r#"
1545 (mod_item name: (identifier) body: _ @mod.body)
1546 (function_item name: (identifier) @fn.name)
1547 "#,
1548 )
1549 .unwrap(),
1550 );
1551 language.set_theme(&theme);
1552
1553 cx.update(|cx| init_test(cx, |_| {}));
1554
1555 let buffer = cx.new_model(|cx| {
1556 Buffer::new(0, cx.entity_id().as_u64(), text).with_language(language, cx)
1557 });
1558 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
1559 let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
1560
1561 let font_size = px(16.0);
1562
1563 let map = cx.new_model(|cx| {
1564 DisplayMap::new(buffer, font("Courier"), font_size, Some(px(40.0)), 1, 1, cx)
1565 });
1566 assert_eq!(
1567 cx.update(|cx| syntax_chunks(0..5, &map, &theme, cx)),
1568 [
1569 ("fn \n".to_string(), None),
1570 ("oute\nr".to_string(), Some(Hsla::blue())),
1571 ("() \n{}\n\n".to_string(), None),
1572 ]
1573 );
1574 assert_eq!(
1575 cx.update(|cx| syntax_chunks(3..5, &map, &theme, cx)),
1576 [("{}\n\n".to_string(), None)]
1577 );
1578
1579 map.update(cx, |map, cx| {
1580 map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx)
1581 });
1582 assert_eq!(
1583 cx.update(|cx| syntax_chunks(1..4, &map, &theme, cx)),
1584 [
1585 ("out".to_string(), Some(Hsla::blue())),
1586 ("āÆ\n".to_string(), None),
1587 (" \nfn ".to_string(), Some(Hsla::red())),
1588 ("i\n".to_string(), Some(Hsla::blue()))
1589 ]
1590 );
1591 }
1592
1593 #[gpui::test]
1594 async fn test_chunks_with_text_highlights(cx: &mut gpui::TestAppContext) {
1595 cx.update(|cx| init_test(cx, |_| {}));
1596
1597 let theme = SyntaxTheme::new_test(vec![
1598 ("operator", Hsla::red().into()),
1599 ("string", Hsla::green().into()),
1600 ]);
1601 let language = Arc::new(
1602 Language::new(
1603 LanguageConfig {
1604 name: "Test".into(),
1605 path_suffixes: vec![".test".to_string()],
1606 ..Default::default()
1607 },
1608 Some(tree_sitter_rust::language()),
1609 )
1610 .with_highlights_query(
1611 r#"
1612 ":" @operator
1613 (string_literal) @string
1614 "#,
1615 )
1616 .unwrap(),
1617 );
1618 language.set_theme(&theme);
1619
1620 let (text, highlighted_ranges) = marked_text_ranges(r#"constĖ Ā«aĀ»: B = "c Ā«dĀ»""#, false);
1621
1622 let buffer = cx.new_model(|cx| {
1623 Buffer::new(0, cx.entity_id().as_u64(), text).with_language(language, cx)
1624 });
1625 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
1626
1627 let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
1628 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
1629
1630 let font_size = px(16.0);
1631 let map =
1632 cx.new_model(|cx| DisplayMap::new(buffer, font("Courier"), font_size, None, 1, 1, cx));
1633
1634 enum MyType {}
1635
1636 let style = HighlightStyle {
1637 color: Some(Hsla::blue()),
1638 ..Default::default()
1639 };
1640
1641 map.update(cx, |map, _cx| {
1642 map.highlight_text(
1643 TypeId::of::<MyType>(),
1644 highlighted_ranges
1645 .into_iter()
1646 .map(|range| {
1647 buffer_snapshot.anchor_before(range.start)
1648 ..buffer_snapshot.anchor_before(range.end)
1649 })
1650 .collect(),
1651 style,
1652 );
1653 });
1654
1655 assert_eq!(
1656 cx.update(|cx| chunks(0..10, &map, &theme, cx)),
1657 [
1658 ("const ".to_string(), None, None),
1659 ("a".to_string(), None, Some(Hsla::blue())),
1660 (":".to_string(), Some(Hsla::red()), None),
1661 (" B = ".to_string(), None, None),
1662 ("\"c ".to_string(), Some(Hsla::green()), None),
1663 ("d".to_string(), Some(Hsla::green()), Some(Hsla::blue())),
1664 ("\"".to_string(), Some(Hsla::green()), None),
1665 ]
1666 );
1667 }
1668
1669 #[gpui::test]
1670 fn test_clip_point(cx: &mut gpui::AppContext) {
1671 init_test(cx, |_| {});
1672
1673 fn assert(text: &str, shift_right: bool, bias: Bias, cx: &mut gpui::AppContext) {
1674 let (unmarked_snapshot, mut markers) = marked_display_snapshot(text, cx);
1675
1676 match bias {
1677 Bias::Left => {
1678 if shift_right {
1679 *markers[1].column_mut() += 1;
1680 }
1681
1682 assert_eq!(unmarked_snapshot.clip_point(markers[1], bias), markers[0])
1683 }
1684 Bias::Right => {
1685 if shift_right {
1686 *markers[0].column_mut() += 1;
1687 }
1688
1689 assert_eq!(unmarked_snapshot.clip_point(markers[0], bias), markers[1])
1690 }
1691 };
1692 }
1693
1694 use Bias::{Left, Right};
1695 assert("ĖĖĪ±", false, Left, cx);
1696 assert("ĖĖĪ±", true, Left, cx);
1697 assert("ĖĖĪ±", false, Right, cx);
1698 assert("ĖĪ±Ė", true, Right, cx);
1699 assert("ĖĖā", false, Left, cx);
1700 assert("ĖĖā", true, Left, cx);
1701 assert("ĖĖā", false, Right, cx);
1702 assert("ĖāĖ", true, Right, cx);
1703 assert("ĖĖš", false, Left, cx);
1704 assert("ĖĖš", true, Left, cx);
1705 assert("ĖĖš", false, Right, cx);
1706 assert("ĖšĖ", true, Right, cx);
1707 assert("ĖĖ\t", false, Left, cx);
1708 assert("ĖĖ\t", true, Left, cx);
1709 assert("ĖĖ\t", false, Right, cx);
1710 assert("Ė\tĖ", true, Right, cx);
1711 assert(" ĖĖ\t", false, Left, cx);
1712 assert(" ĖĖ\t", true, Left, cx);
1713 assert(" ĖĖ\t", false, Right, cx);
1714 assert(" Ė\tĖ", true, Right, cx);
1715 assert(" ĖĖ\t", false, Left, cx);
1716 assert(" ĖĖ\t", false, Right, cx);
1717 }
1718
1719 #[gpui::test]
1720 fn test_clip_at_line_ends(cx: &mut gpui::AppContext) {
1721 init_test(cx, |_| {});
1722
1723 fn assert(text: &str, cx: &mut gpui::AppContext) {
1724 let (mut unmarked_snapshot, markers) = marked_display_snapshot(text, cx);
1725 unmarked_snapshot.clip_at_line_ends = true;
1726 assert_eq!(
1727 unmarked_snapshot.clip_point(markers[1], Bias::Left),
1728 markers[0]
1729 );
1730 }
1731
1732 assert("ĖĖ", cx);
1733 assert("ĖaĖ", cx);
1734 assert("aĖbĖ", cx);
1735 assert("aĖĪ±Ė", cx);
1736 }
1737
1738 #[gpui::test]
1739 fn test_tabs_with_multibyte_chars(cx: &mut gpui::AppContext) {
1740 init_test(cx, |_| {});
1741
1742 let text = "ā
\t\tĪ±\nĪ²\t\nšĪ²\t\tĪ³";
1743 let buffer = MultiBuffer::build_simple(text, cx);
1744 let font_size = px(14.0);
1745
1746 let map = cx.new_model(|cx| {
1747 DisplayMap::new(buffer.clone(), font("Helvetica"), font_size, None, 1, 1, cx)
1748 });
1749 let map = map.update(cx, |map, cx| map.snapshot(cx));
1750 assert_eq!(map.text(), "ā
Ī±\nĪ² \nšĪ² Ī³");
1751 assert_eq!(
1752 map.text_chunks(0).collect::<String>(),
1753 "ā
Ī±\nĪ² \nšĪ² Ī³"
1754 );
1755 assert_eq!(map.text_chunks(1).collect::<String>(), "Ī² \nšĪ² Ī³");
1756 assert_eq!(map.text_chunks(2).collect::<String>(), "šĪ² Ī³");
1757
1758 let point = Point::new(0, "ā
\t\t".len() as u32);
1759 let display_point = DisplayPoint::new(0, "ā
".len() as u32);
1760 assert_eq!(point.to_display_point(&map), display_point);
1761 assert_eq!(display_point.to_point(&map), point);
1762
1763 let point = Point::new(1, "Ī²\t".len() as u32);
1764 let display_point = DisplayPoint::new(1, "Ī² ".len() as u32);
1765 assert_eq!(point.to_display_point(&map), display_point);
1766 assert_eq!(display_point.to_point(&map), point,);
1767
1768 let point = Point::new(2, "šĪ²\t\t".len() as u32);
1769 let display_point = DisplayPoint::new(2, "šĪ² ".len() as u32);
1770 assert_eq!(point.to_display_point(&map), display_point);
1771 assert_eq!(display_point.to_point(&map), point,);
1772
1773 // Display points inside of expanded tabs
1774 assert_eq!(
1775 DisplayPoint::new(0, "ā
".len() as u32).to_point(&map),
1776 Point::new(0, "ā
\t".len() as u32),
1777 );
1778 assert_eq!(
1779 DisplayPoint::new(0, "ā
".len() as u32).to_point(&map),
1780 Point::new(0, "ā
".len() as u32),
1781 );
1782
1783 // Clipping display points inside of multi-byte characters
1784 assert_eq!(
1785 map.clip_point(DisplayPoint::new(0, "ā
".len() as u32 - 1), Left),
1786 DisplayPoint::new(0, 0)
1787 );
1788 assert_eq!(
1789 map.clip_point(DisplayPoint::new(0, "ā
".len() as u32 - 1), Bias::Right),
1790 DisplayPoint::new(0, "ā
".len() as u32)
1791 );
1792 }
1793
1794 #[gpui::test]
1795 fn test_max_point(cx: &mut gpui::AppContext) {
1796 init_test(cx, |_| {});
1797
1798 let buffer = MultiBuffer::build_simple("aaa\n\t\tbbb", cx);
1799 let font_size = px(14.0);
1800 let map = cx.new_model(|cx| {
1801 DisplayMap::new(buffer.clone(), font("Helvetica"), font_size, None, 1, 1, cx)
1802 });
1803 assert_eq!(
1804 map.update(cx, |map, cx| map.snapshot(cx)).max_point(),
1805 DisplayPoint::new(1, 11)
1806 )
1807 }
1808
1809 fn syntax_chunks<'a>(
1810 rows: Range<u32>,
1811 map: &Model<DisplayMap>,
1812 theme: &'a SyntaxTheme,
1813 cx: &mut AppContext,
1814 ) -> Vec<(String, Option<Hsla>)> {
1815 chunks(rows, map, theme, cx)
1816 .into_iter()
1817 .map(|(text, color, _)| (text, color))
1818 .collect()
1819 }
1820
1821 fn chunks<'a>(
1822 rows: Range<u32>,
1823 map: &Model<DisplayMap>,
1824 theme: &'a SyntaxTheme,
1825 cx: &mut AppContext,
1826 ) -> Vec<(String, Option<Hsla>, Option<Hsla>)> {
1827 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1828 let mut chunks: Vec<(String, Option<Hsla>, Option<Hsla>)> = Vec::new();
1829 for chunk in snapshot.chunks(rows, true, None, None) {
1830 let syntax_color = chunk
1831 .syntax_highlight_id
1832 .and_then(|id| id.style(theme)?.color);
1833 let highlight_color = chunk.highlight_style.and_then(|style| style.color);
1834 if let Some((last_chunk, last_syntax_color, last_highlight_color)) = chunks.last_mut() {
1835 if syntax_color == *last_syntax_color && highlight_color == *last_highlight_color {
1836 last_chunk.push_str(chunk.text);
1837 continue;
1838 }
1839 }
1840 chunks.push((chunk.text.to_string(), syntax_color, highlight_color));
1841 }
1842 chunks
1843 }
1844
1845 fn init_test(cx: &mut AppContext, f: impl Fn(&mut AllLanguageSettingsContent)) {
1846 let settings = SettingsStore::test(cx);
1847 cx.set_global(settings);
1848 language::init(cx);
1849 crate::init(cx);
1850 Project::init_settings(cx);
1851 theme::init(LoadThemes::JustBase, cx);
1852 cx.update_global::<SettingsStore, _>(|store, cx| {
1853 store.update_user_settings::<AllLanguageSettings>(cx, f);
1854 });
1855 }
1856}