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 crease_map;
22mod custom_highlights;
23mod fold_map;
24mod inlay_map;
25pub(crate) mod invisibles;
26mod tab_map;
27mod wrap_map;
28
29use crate::{
30 EditorStyle, RowExt, hover_links::InlayHighlight, inlays::Inlay, movement::TextLayoutDetails,
31};
32pub use block_map::{
33 Block, BlockChunks as DisplayChunks, BlockContext, BlockId, BlockMap, BlockPlacement,
34 BlockPoint, BlockProperties, BlockRows, BlockStyle, CustomBlockId, EditorMargins, RenderBlock,
35 StickyHeaderExcerpt,
36};
37use block_map::{BlockRow, BlockSnapshot};
38use collections::{HashMap, HashSet};
39pub use crease_map::*;
40use fold_map::FoldSnapshot;
41pub use fold_map::{
42 ChunkRenderer, ChunkRendererContext, ChunkRendererId, Fold, FoldId, FoldPlaceholder, FoldPoint,
43};
44use gpui::{App, Context, Entity, Font, HighlightStyle, LineLayout, Pixels, UnderlineStyle};
45use inlay_map::InlaySnapshot;
46pub use inlay_map::{InlayOffset, InlayPoint};
47pub use invisibles::{is_invisible, replacement};
48use language::{
49 OffsetUtf16, Point, Subscription as BufferSubscription, language_settings::language_settings,
50};
51use multi_buffer::{
52 Anchor, AnchorRangeExt, MultiBuffer, MultiBufferPoint, MultiBufferRow, MultiBufferSnapshot,
53 RowInfo, ToOffset, ToPoint,
54};
55use project::InlayId;
56use project::project_settings::DiagnosticSeverity;
57use serde::Deserialize;
58
59use std::{
60 any::TypeId,
61 borrow::Cow,
62 fmt::Debug,
63 iter,
64 num::NonZeroU32,
65 ops::{Add, Range, Sub},
66 sync::Arc,
67};
68use sum_tree::{Bias, TreeMap};
69use tab_map::TabSnapshot;
70use text::{BufferId, LineIndent};
71use ui::{SharedString, px};
72use unicode_segmentation::UnicodeSegmentation;
73use wrap_map::{WrapMap, WrapSnapshot};
74
75pub use crate::display_map::{fold_map::FoldMap, inlay_map::InlayMap, tab_map::TabMap};
76
77#[derive(Copy, Clone, Debug, PartialEq, Eq)]
78pub enum FoldStatus {
79 Folded,
80 Foldable,
81}
82
83#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
84pub enum HighlightKey {
85 Type(TypeId),
86 TypePlus(TypeId, usize),
87}
88
89pub trait ToDisplayPoint {
90 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint;
91}
92
93type TextHighlights = TreeMap<HighlightKey, Arc<(HighlightStyle, Vec<Range<Anchor>>)>>;
94type InlayHighlights = TreeMap<TypeId, TreeMap<InlayId, (HighlightStyle, InlayHighlight)>>;
95
96/// Decides how text in a [`MultiBuffer`] should be displayed in a buffer, handling inlay hints,
97/// folding, hard tabs, soft wrapping, custom blocks (like diagnostics), and highlighting.
98///
99/// See the [module level documentation](self) for more information.
100pub struct DisplayMap {
101 /// The buffer that we are displaying.
102 buffer: Entity<MultiBuffer>,
103 buffer_subscription: BufferSubscription,
104 /// Decides where the [`Inlay`]s should be displayed.
105 inlay_map: InlayMap,
106 /// Decides where the fold indicators should be and tracks parts of a source file that are currently folded.
107 fold_map: FoldMap,
108 /// Keeps track of hard tabs in a buffer.
109 tab_map: TabMap,
110 /// Handles soft wrapping.
111 wrap_map: Entity<WrapMap>,
112 /// Tracks custom blocks such as diagnostics that should be displayed within buffer.
113 block_map: BlockMap,
114 /// Regions of text that should be highlighted.
115 text_highlights: TextHighlights,
116 /// Regions of inlays that should be highlighted.
117 inlay_highlights: InlayHighlights,
118 /// A container for explicitly foldable ranges, which supersede indentation based fold range suggestions.
119 crease_map: CreaseMap,
120 pub(crate) fold_placeholder: FoldPlaceholder,
121 pub clip_at_line_ends: bool,
122 pub(crate) masked: bool,
123 pub(crate) diagnostics_max_severity: DiagnosticSeverity,
124}
125
126impl DisplayMap {
127 pub fn new(
128 buffer: Entity<MultiBuffer>,
129 font: Font,
130 font_size: Pixels,
131 wrap_width: Option<Pixels>,
132 buffer_header_height: u32,
133 excerpt_header_height: u32,
134 fold_placeholder: FoldPlaceholder,
135 diagnostics_max_severity: DiagnosticSeverity,
136 cx: &mut Context<Self>,
137 ) -> Self {
138 let buffer_subscription = buffer.update(cx, |buffer, _| buffer.subscribe());
139
140 let tab_size = Self::tab_size(&buffer, cx);
141 let buffer_snapshot = buffer.read(cx).snapshot(cx);
142 let crease_map = CreaseMap::new(&buffer_snapshot);
143 let (inlay_map, snapshot) = InlayMap::new(buffer_snapshot);
144 let (fold_map, snapshot) = FoldMap::new(snapshot);
145 let (tab_map, snapshot) = TabMap::new(snapshot, tab_size);
146 let (wrap_map, snapshot) = WrapMap::new(snapshot, font, font_size, wrap_width, cx);
147 let block_map = BlockMap::new(snapshot, buffer_header_height, excerpt_header_height);
148
149 cx.observe(&wrap_map, |_, _, cx| cx.notify()).detach();
150
151 DisplayMap {
152 buffer,
153 buffer_subscription,
154 fold_map,
155 inlay_map,
156 tab_map,
157 wrap_map,
158 block_map,
159 crease_map,
160 fold_placeholder,
161 diagnostics_max_severity,
162 text_highlights: Default::default(),
163 inlay_highlights: Default::default(),
164 clip_at_line_ends: false,
165 masked: false,
166 }
167 }
168
169 pub fn snapshot(&mut self, cx: &mut Context<Self>) -> DisplaySnapshot {
170 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
171 let edits = self.buffer_subscription.consume().into_inner();
172 let (inlay_snapshot, edits) = self.inlay_map.sync(buffer_snapshot, edits);
173 let (fold_snapshot, edits) = self.fold_map.read(inlay_snapshot, edits);
174 let tab_size = Self::tab_size(&self.buffer, cx);
175 let (tab_snapshot, edits) = self.tab_map.sync(fold_snapshot, edits, tab_size);
176 let (wrap_snapshot, edits) = self
177 .wrap_map
178 .update(cx, |map, cx| map.sync(tab_snapshot, edits, cx));
179 let block_snapshot = self.block_map.read(wrap_snapshot, edits).snapshot;
180
181 DisplaySnapshot {
182 block_snapshot,
183 diagnostics_max_severity: self.diagnostics_max_severity,
184 crease_snapshot: self.crease_map.snapshot(),
185 text_highlights: self.text_highlights.clone(),
186 inlay_highlights: self.inlay_highlights.clone(),
187 clip_at_line_ends: self.clip_at_line_ends,
188 masked: self.masked,
189 fold_placeholder: self.fold_placeholder.clone(),
190 }
191 }
192
193 pub fn set_state(&mut self, other: &DisplaySnapshot, cx: &mut Context<Self>) {
194 self.fold(
195 other
196 .folds_in_range(0..other.buffer_snapshot().len())
197 .map(|fold| {
198 Crease::simple(
199 fold.range.to_offset(other.buffer_snapshot()),
200 fold.placeholder.clone(),
201 )
202 })
203 .collect(),
204 cx,
205 );
206 }
207
208 /// Creates folds for the given creases.
209 pub fn fold<T: Clone + ToOffset>(&mut self, creases: Vec<Crease<T>>, cx: &mut Context<Self>) {
210 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
211 let edits = self.buffer_subscription.consume().into_inner();
212 let tab_size = Self::tab_size(&self.buffer, cx);
213 let (snapshot, edits) = self.inlay_map.sync(buffer_snapshot.clone(), edits);
214 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
215 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
216 let (snapshot, edits) = self
217 .wrap_map
218 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
219 self.block_map.read(snapshot, edits);
220
221 let inline = creases.iter().filter_map(|crease| {
222 if let Crease::Inline {
223 range, placeholder, ..
224 } = crease
225 {
226 Some((range.clone(), placeholder.clone()))
227 } else {
228 None
229 }
230 });
231 let (snapshot, edits) = fold_map.fold(inline);
232
233 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
234 let (snapshot, edits) = self
235 .wrap_map
236 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
237 let mut block_map = self.block_map.write(snapshot, edits);
238 let blocks = creases.into_iter().filter_map(|crease| {
239 if let Crease::Block {
240 range,
241 block_height,
242 render_block,
243 block_style,
244 block_priority,
245 ..
246 } = crease
247 {
248 Some((
249 range,
250 render_block,
251 block_height,
252 block_style,
253 block_priority,
254 ))
255 } else {
256 None
257 }
258 });
259 block_map.insert(
260 blocks
261 .into_iter()
262 .map(|(range, render, height, style, priority)| {
263 let start = buffer_snapshot.anchor_before(range.start);
264 let end = buffer_snapshot.anchor_after(range.end);
265 BlockProperties {
266 placement: BlockPlacement::Replace(start..=end),
267 render,
268 height: Some(height),
269 style,
270 priority,
271 }
272 }),
273 );
274 }
275
276 /// Removes any folds with the given ranges.
277 pub fn remove_folds_with_type<T: ToOffset>(
278 &mut self,
279 ranges: impl IntoIterator<Item = Range<T>>,
280 type_id: TypeId,
281 cx: &mut Context<Self>,
282 ) {
283 let snapshot = self.buffer.read(cx).snapshot(cx);
284 let edits = self.buffer_subscription.consume().into_inner();
285 let tab_size = Self::tab_size(&self.buffer, cx);
286 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
287 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
288 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
289 let (snapshot, edits) = self
290 .wrap_map
291 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
292 self.block_map.read(snapshot, edits);
293 let (snapshot, edits) = fold_map.remove_folds(ranges, type_id);
294 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
295 let (snapshot, edits) = self
296 .wrap_map
297 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
298 self.block_map.write(snapshot, edits);
299 }
300
301 /// Removes any folds whose ranges intersect any of the given ranges.
302 pub fn unfold_intersecting<T: ToOffset>(
303 &mut self,
304 ranges: impl IntoIterator<Item = Range<T>>,
305 inclusive: bool,
306 cx: &mut Context<Self>,
307 ) {
308 let snapshot = self.buffer.read(cx).snapshot(cx);
309 let offset_ranges = ranges
310 .into_iter()
311 .map(|range| range.start.to_offset(&snapshot)..range.end.to_offset(&snapshot))
312 .collect::<Vec<_>>();
313 let edits = self.buffer_subscription.consume().into_inner();
314 let tab_size = Self::tab_size(&self.buffer, cx);
315 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
316 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
317 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
318 let (snapshot, edits) = self
319 .wrap_map
320 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
321 self.block_map.read(snapshot, edits);
322
323 let (snapshot, edits) =
324 fold_map.unfold_intersecting(offset_ranges.iter().cloned(), inclusive);
325 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
326 let (snapshot, edits) = self
327 .wrap_map
328 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
329 let mut block_map = self.block_map.write(snapshot, edits);
330 block_map.remove_intersecting_replace_blocks(offset_ranges, inclusive);
331 }
332
333 pub fn disable_header_for_buffer(&mut self, buffer_id: BufferId, cx: &mut Context<Self>) {
334 let snapshot = self.buffer.read(cx).snapshot(cx);
335 let edits = self.buffer_subscription.consume().into_inner();
336 let tab_size = Self::tab_size(&self.buffer, cx);
337 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
338 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
339 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
340 let (snapshot, edits) = self
341 .wrap_map
342 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
343 let mut block_map = self.block_map.write(snapshot, edits);
344 block_map.disable_header_for_buffer(buffer_id)
345 }
346
347 pub fn fold_buffers(
348 &mut self,
349 buffer_ids: impl IntoIterator<Item = language::BufferId>,
350 cx: &mut Context<Self>,
351 ) {
352 let snapshot = self.buffer.read(cx).snapshot(cx);
353 let edits = self.buffer_subscription.consume().into_inner();
354 let tab_size = Self::tab_size(&self.buffer, cx);
355 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
356 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
357 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
358 let (snapshot, edits) = self
359 .wrap_map
360 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
361 let mut block_map = self.block_map.write(snapshot, edits);
362 block_map.fold_buffers(buffer_ids, self.buffer.read(cx), cx)
363 }
364
365 pub fn unfold_buffers(
366 &mut self,
367 buffer_ids: impl IntoIterator<Item = language::BufferId>,
368 cx: &mut Context<Self>,
369 ) {
370 let snapshot = self.buffer.read(cx).snapshot(cx);
371 let edits = self.buffer_subscription.consume().into_inner();
372 let tab_size = Self::tab_size(&self.buffer, cx);
373 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
374 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
375 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
376 let (snapshot, edits) = self
377 .wrap_map
378 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
379 let mut block_map = self.block_map.write(snapshot, edits);
380 block_map.unfold_buffers(buffer_ids, self.buffer.read(cx), cx)
381 }
382
383 pub(crate) fn is_buffer_folded(&self, buffer_id: language::BufferId) -> bool {
384 self.block_map.folded_buffers.contains(&buffer_id)
385 }
386
387 pub(crate) fn folded_buffers(&self) -> &HashSet<BufferId> {
388 &self.block_map.folded_buffers
389 }
390
391 pub fn insert_creases(
392 &mut self,
393 creases: impl IntoIterator<Item = Crease<Anchor>>,
394 cx: &mut Context<Self>,
395 ) -> Vec<CreaseId> {
396 let snapshot = self.buffer.read(cx).snapshot(cx);
397 self.crease_map.insert(creases, &snapshot)
398 }
399
400 pub fn remove_creases(
401 &mut self,
402 crease_ids: impl IntoIterator<Item = CreaseId>,
403 cx: &mut Context<Self>,
404 ) -> Vec<(CreaseId, Range<Anchor>)> {
405 let snapshot = self.buffer.read(cx).snapshot(cx);
406 self.crease_map.remove(crease_ids, &snapshot)
407 }
408
409 pub fn insert_blocks(
410 &mut self,
411 blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
412 cx: &mut Context<Self>,
413 ) -> Vec<CustomBlockId> {
414 let snapshot = self.buffer.read(cx).snapshot(cx);
415 let edits = self.buffer_subscription.consume().into_inner();
416 let tab_size = Self::tab_size(&self.buffer, cx);
417 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
418 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
419 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
420 let (snapshot, edits) = self
421 .wrap_map
422 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
423 let mut block_map = self.block_map.write(snapshot, edits);
424 block_map.insert(blocks)
425 }
426
427 pub fn resize_blocks(&mut self, heights: HashMap<CustomBlockId, u32>, cx: &mut Context<Self>) {
428 let snapshot = self.buffer.read(cx).snapshot(cx);
429 let edits = self.buffer_subscription.consume().into_inner();
430 let tab_size = Self::tab_size(&self.buffer, cx);
431 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
432 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
433 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
434 let (snapshot, edits) = self
435 .wrap_map
436 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
437 let mut block_map = self.block_map.write(snapshot, edits);
438 block_map.resize(heights);
439 }
440
441 pub fn replace_blocks(&mut self, renderers: HashMap<CustomBlockId, RenderBlock>) {
442 self.block_map.replace_blocks(renderers);
443 }
444
445 pub fn remove_blocks(&mut self, ids: HashSet<CustomBlockId>, cx: &mut Context<Self>) {
446 let snapshot = self.buffer.read(cx).snapshot(cx);
447 let edits = self.buffer_subscription.consume().into_inner();
448 let tab_size = Self::tab_size(&self.buffer, cx);
449 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
450 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
451 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
452 let (snapshot, edits) = self
453 .wrap_map
454 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
455 let mut block_map = self.block_map.write(snapshot, edits);
456 block_map.remove(ids);
457 }
458
459 pub fn row_for_block(
460 &mut self,
461 block_id: CustomBlockId,
462 cx: &mut Context<Self>,
463 ) -> Option<DisplayRow> {
464 let snapshot = self.buffer.read(cx).snapshot(cx);
465 let edits = self.buffer_subscription.consume().into_inner();
466 let tab_size = Self::tab_size(&self.buffer, cx);
467 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
468 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
469 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
470 let (snapshot, edits) = self
471 .wrap_map
472 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
473 let block_map = self.block_map.read(snapshot, edits);
474 let block_row = block_map.row_for_block(block_id)?;
475 Some(DisplayRow(block_row.0))
476 }
477
478 pub fn highlight_text(
479 &mut self,
480 key: HighlightKey,
481 ranges: Vec<Range<Anchor>>,
482 style: HighlightStyle,
483 ) {
484 self.text_highlights.insert(key, Arc::new((style, ranges)));
485 }
486
487 pub(crate) fn highlight_inlays(
488 &mut self,
489 type_id: TypeId,
490 highlights: Vec<InlayHighlight>,
491 style: HighlightStyle,
492 ) {
493 for highlight in highlights {
494 let update = self.inlay_highlights.update(&type_id, |highlights| {
495 highlights.insert(highlight.inlay, (style, highlight.clone()))
496 });
497 if update.is_none() {
498 self.inlay_highlights.insert(
499 type_id,
500 TreeMap::from_ordered_entries([(highlight.inlay, (style, highlight))]),
501 );
502 }
503 }
504 }
505
506 pub fn text_highlights(&self, type_id: TypeId) -> Option<(HighlightStyle, &[Range<Anchor>])> {
507 let highlights = self.text_highlights.get(&HighlightKey::Type(type_id))?;
508 Some((highlights.0, &highlights.1))
509 }
510
511 #[cfg(feature = "test-support")]
512 pub fn all_text_highlights(
513 &self,
514 ) -> impl Iterator<Item = &Arc<(HighlightStyle, Vec<Range<Anchor>>)>> {
515 self.text_highlights.values()
516 }
517
518 pub fn clear_highlights(&mut self, type_id: TypeId) -> bool {
519 let mut cleared = self
520 .text_highlights
521 .remove(&HighlightKey::Type(type_id))
522 .is_some();
523 cleared |= self.inlay_highlights.remove(&type_id).is_some();
524 cleared
525 }
526
527 pub fn set_font(&self, font: Font, font_size: Pixels, cx: &mut Context<Self>) -> bool {
528 self.wrap_map
529 .update(cx, |map, cx| map.set_font_with_size(font, font_size, cx))
530 }
531
532 pub fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut Context<Self>) -> bool {
533 self.wrap_map
534 .update(cx, |map, cx| map.set_wrap_width(width, cx))
535 }
536
537 pub fn update_fold_widths(
538 &mut self,
539 widths: impl IntoIterator<Item = (ChunkRendererId, Pixels)>,
540 cx: &mut Context<Self>,
541 ) -> bool {
542 let snapshot = self.buffer.read(cx).snapshot(cx);
543 let edits = self.buffer_subscription.consume().into_inner();
544 let tab_size = Self::tab_size(&self.buffer, cx);
545 let (snapshot, edits) = self.inlay_map.sync(snapshot, edits);
546 let (mut fold_map, snapshot, edits) = self.fold_map.write(snapshot, edits);
547 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
548 let (snapshot, edits) = self
549 .wrap_map
550 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
551 self.block_map.read(snapshot, edits);
552
553 let (snapshot, edits) = fold_map.update_fold_widths(widths);
554 let widths_changed = !edits.is_empty();
555 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
556 let (snapshot, edits) = self
557 .wrap_map
558 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
559 self.block_map.read(snapshot, edits);
560
561 widths_changed
562 }
563
564 pub(crate) fn current_inlays(&self) -> impl Iterator<Item = &Inlay> {
565 self.inlay_map.current_inlays()
566 }
567
568 pub(crate) fn splice_inlays(
569 &mut self,
570 to_remove: &[InlayId],
571 to_insert: Vec<Inlay>,
572 cx: &mut Context<Self>,
573 ) {
574 if to_remove.is_empty() && to_insert.is_empty() {
575 return;
576 }
577 let buffer_snapshot = self.buffer.read(cx).snapshot(cx);
578 let edits = self.buffer_subscription.consume().into_inner();
579 let (snapshot, edits) = self.inlay_map.sync(buffer_snapshot, edits);
580 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
581 let tab_size = Self::tab_size(&self.buffer, cx);
582 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
583 let (snapshot, edits) = self
584 .wrap_map
585 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
586 self.block_map.read(snapshot, edits);
587
588 let (snapshot, edits) = self.inlay_map.splice(to_remove, to_insert);
589 let (snapshot, edits) = self.fold_map.read(snapshot, edits);
590 let (snapshot, edits) = self.tab_map.sync(snapshot, edits, tab_size);
591 let (snapshot, edits) = self
592 .wrap_map
593 .update(cx, |map, cx| map.sync(snapshot, edits, cx));
594 self.block_map.read(snapshot, edits);
595 }
596
597 fn tab_size(buffer: &Entity<MultiBuffer>, cx: &App) -> NonZeroU32 {
598 let buffer = buffer.read(cx).as_singleton().map(|buffer| buffer.read(cx));
599 let language = buffer
600 .and_then(|buffer| buffer.language())
601 .map(|l| l.name());
602 let file = buffer.and_then(|buffer| buffer.file());
603 language_settings(language, file, cx).tab_size
604 }
605
606 #[cfg(test)]
607 pub fn is_rewrapping(&self, cx: &gpui::App) -> bool {
608 self.wrap_map.read(cx).is_rewrapping()
609 }
610}
611
612#[derive(Debug, Default)]
613pub(crate) struct Highlights<'a> {
614 pub text_highlights: Option<&'a TextHighlights>,
615 pub inlay_highlights: Option<&'a InlayHighlights>,
616 pub styles: HighlightStyles,
617}
618
619#[derive(Clone, Copy, Debug)]
620pub struct EditPredictionStyles {
621 pub insertion: HighlightStyle,
622 pub whitespace: HighlightStyle,
623}
624
625#[derive(Default, Debug, Clone, Copy)]
626pub struct HighlightStyles {
627 pub inlay_hint: Option<HighlightStyle>,
628 pub edit_prediction: Option<EditPredictionStyles>,
629}
630
631#[derive(Clone)]
632pub enum ChunkReplacement {
633 Renderer(ChunkRenderer),
634 Str(SharedString),
635}
636
637pub struct HighlightedChunk<'a> {
638 pub text: &'a str,
639 pub style: Option<HighlightStyle>,
640 pub is_tab: bool,
641 pub is_inlay: bool,
642 pub replacement: Option<ChunkReplacement>,
643}
644
645impl<'a> HighlightedChunk<'a> {
646 fn highlight_invisibles(
647 self,
648 editor_style: &'a EditorStyle,
649 ) -> impl Iterator<Item = Self> + 'a {
650 let mut chars = self.text.chars().peekable();
651 let mut text = self.text;
652 let style = self.style;
653 let is_tab = self.is_tab;
654 let renderer = self.replacement;
655 let is_inlay = self.is_inlay;
656 iter::from_fn(move || {
657 let mut prefix_len = 0;
658 while let Some(&ch) = chars.peek() {
659 if !is_invisible(ch) {
660 prefix_len += ch.len_utf8();
661 chars.next();
662 continue;
663 }
664 if prefix_len > 0 {
665 let (prefix, suffix) = text.split_at(prefix_len);
666 text = suffix;
667 return Some(HighlightedChunk {
668 text: prefix,
669 style,
670 is_tab,
671 is_inlay,
672 replacement: renderer.clone(),
673 });
674 }
675 chars.next();
676 let (prefix, suffix) = text.split_at(ch.len_utf8());
677 text = suffix;
678 if let Some(replacement) = replacement(ch) {
679 let invisible_highlight = HighlightStyle {
680 background_color: Some(editor_style.status.hint_background),
681 underline: Some(UnderlineStyle {
682 color: Some(editor_style.status.hint),
683 thickness: px(1.),
684 wavy: false,
685 }),
686 ..Default::default()
687 };
688 let invisible_style = if let Some(style) = style {
689 style.highlight(invisible_highlight)
690 } else {
691 invisible_highlight
692 };
693 return Some(HighlightedChunk {
694 text: prefix,
695 style: Some(invisible_style),
696 is_tab: false,
697 is_inlay,
698 replacement: Some(ChunkReplacement::Str(replacement.into())),
699 });
700 } else {
701 let invisible_highlight = HighlightStyle {
702 background_color: Some(editor_style.status.hint_background),
703 underline: Some(UnderlineStyle {
704 color: Some(editor_style.status.hint),
705 thickness: px(1.),
706 wavy: false,
707 }),
708 ..Default::default()
709 };
710 let invisible_style = if let Some(style) = style {
711 style.highlight(invisible_highlight)
712 } else {
713 invisible_highlight
714 };
715
716 return Some(HighlightedChunk {
717 text: prefix,
718 style: Some(invisible_style),
719 is_tab: false,
720 is_inlay,
721 replacement: renderer.clone(),
722 });
723 }
724 }
725
726 if !text.is_empty() {
727 let remainder = text;
728 text = "";
729 Some(HighlightedChunk {
730 text: remainder,
731 style,
732 is_tab,
733 is_inlay,
734 replacement: renderer.clone(),
735 })
736 } else {
737 None
738 }
739 })
740 }
741}
742
743#[derive(Clone)]
744pub struct DisplaySnapshot {
745 pub crease_snapshot: CreaseSnapshot,
746 block_snapshot: BlockSnapshot,
747 text_highlights: TextHighlights,
748 inlay_highlights: InlayHighlights,
749 clip_at_line_ends: bool,
750 masked: bool,
751 diagnostics_max_severity: DiagnosticSeverity,
752 pub(crate) fold_placeholder: FoldPlaceholder,
753}
754
755impl DisplaySnapshot {
756 pub fn wrap_snapshot(&self) -> &WrapSnapshot {
757 &self.block_snapshot.wrap_snapshot
758 }
759 pub fn tab_snapshot(&self) -> &TabSnapshot {
760 &self.block_snapshot.wrap_snapshot.tab_snapshot
761 }
762
763 pub fn fold_snapshot(&self) -> &FoldSnapshot {
764 &self.block_snapshot.wrap_snapshot.tab_snapshot.fold_snapshot
765 }
766
767 pub fn inlay_snapshot(&self) -> &InlaySnapshot {
768 &self
769 .block_snapshot
770 .wrap_snapshot
771 .tab_snapshot
772 .fold_snapshot
773 .inlay_snapshot
774 }
775
776 pub fn buffer_snapshot(&self) -> &MultiBufferSnapshot {
777 &self
778 .block_snapshot
779 .wrap_snapshot
780 .tab_snapshot
781 .fold_snapshot
782 .inlay_snapshot
783 .buffer
784 }
785
786 #[cfg(test)]
787 pub fn fold_count(&self) -> usize {
788 self.fold_snapshot().fold_count()
789 }
790
791 pub fn is_empty(&self) -> bool {
792 self.buffer_snapshot().len() == 0
793 }
794
795 pub fn row_infos(&self, start_row: DisplayRow) -> impl Iterator<Item = RowInfo> + '_ {
796 self.block_snapshot.row_infos(BlockRow(start_row.0))
797 }
798
799 pub fn widest_line_number(&self) -> u32 {
800 self.buffer_snapshot().widest_line_number()
801 }
802
803 pub fn prev_line_boundary(&self, mut point: MultiBufferPoint) -> (Point, DisplayPoint) {
804 loop {
805 let mut inlay_point = self.inlay_snapshot().to_inlay_point(point);
806 let mut fold_point = self.fold_snapshot().to_fold_point(inlay_point, Bias::Left);
807 fold_point.0.column = 0;
808 inlay_point = fold_point.to_inlay_point(self.fold_snapshot());
809 point = self.inlay_snapshot().to_buffer_point(inlay_point);
810
811 let mut display_point = self.point_to_display_point(point, Bias::Left);
812 *display_point.column_mut() = 0;
813 let next_point = self.display_point_to_point(display_point, Bias::Left);
814 if next_point == point {
815 return (point, display_point);
816 }
817 point = next_point;
818 }
819 }
820
821 pub fn next_line_boundary(
822 &self,
823 mut point: MultiBufferPoint,
824 ) -> (MultiBufferPoint, DisplayPoint) {
825 let original_point = point;
826 loop {
827 let mut inlay_point = self.inlay_snapshot().to_inlay_point(point);
828 let mut fold_point = self.fold_snapshot().to_fold_point(inlay_point, Bias::Right);
829 fold_point.0.column = self.fold_snapshot().line_len(fold_point.row());
830 inlay_point = fold_point.to_inlay_point(self.fold_snapshot());
831 point = self.inlay_snapshot().to_buffer_point(inlay_point);
832
833 let mut display_point = self.point_to_display_point(point, Bias::Right);
834 *display_point.column_mut() = self.line_len(display_point.row());
835 let next_point = self.display_point_to_point(display_point, Bias::Right);
836 if next_point == point || original_point == point || original_point == next_point {
837 return (point, display_point);
838 }
839 point = next_point;
840 }
841 }
842
843 // used by line_mode selections and tries to match vim behavior
844 pub fn expand_to_line(&self, range: Range<Point>) -> Range<Point> {
845 let new_start = MultiBufferPoint::new(range.start.row, 0);
846 let new_end = if range.end.column > 0 {
847 MultiBufferPoint::new(
848 range.end.row,
849 self.buffer_snapshot()
850 .line_len(MultiBufferRow(range.end.row)),
851 )
852 } else {
853 range.end
854 };
855
856 new_start..new_end
857 }
858
859 pub fn point_to_display_point(&self, point: MultiBufferPoint, bias: Bias) -> DisplayPoint {
860 let inlay_point = self.inlay_snapshot().to_inlay_point(point);
861 let fold_point = self.fold_snapshot().to_fold_point(inlay_point, bias);
862 let tab_point = self.tab_snapshot().to_tab_point(fold_point);
863 let wrap_point = self.wrap_snapshot().tab_point_to_wrap_point(tab_point);
864 let block_point = self.block_snapshot.to_block_point(wrap_point);
865 DisplayPoint(block_point)
866 }
867
868 pub fn display_point_to_point(&self, point: DisplayPoint, bias: Bias) -> Point {
869 self.inlay_snapshot()
870 .to_buffer_point(self.display_point_to_inlay_point(point, bias))
871 }
872
873 pub fn display_point_to_inlay_offset(&self, point: DisplayPoint, bias: Bias) -> InlayOffset {
874 self.inlay_snapshot()
875 .to_offset(self.display_point_to_inlay_point(point, bias))
876 }
877
878 pub fn anchor_to_inlay_offset(&self, anchor: Anchor) -> InlayOffset {
879 self.inlay_snapshot()
880 .to_inlay_offset(anchor.to_offset(self.buffer_snapshot()))
881 }
882
883 pub fn display_point_to_anchor(&self, point: DisplayPoint, bias: Bias) -> Anchor {
884 self.buffer_snapshot()
885 .anchor_at(point.to_offset(self, bias), bias)
886 }
887
888 fn display_point_to_inlay_point(&self, point: DisplayPoint, bias: Bias) -> InlayPoint {
889 let block_point = point.0;
890 let wrap_point = self.block_snapshot.to_wrap_point(block_point, bias);
891 let tab_point = self.wrap_snapshot().to_tab_point(wrap_point);
892 let fold_point = self.tab_snapshot().to_fold_point(tab_point, bias).0;
893 fold_point.to_inlay_point(self.fold_snapshot())
894 }
895
896 pub fn display_point_to_fold_point(&self, point: DisplayPoint, bias: Bias) -> FoldPoint {
897 let block_point = point.0;
898 let wrap_point = self.block_snapshot.to_wrap_point(block_point, bias);
899 let tab_point = self.wrap_snapshot().to_tab_point(wrap_point);
900 self.tab_snapshot().to_fold_point(tab_point, bias).0
901 }
902
903 pub fn fold_point_to_display_point(&self, fold_point: FoldPoint) -> DisplayPoint {
904 let tab_point = self.tab_snapshot().to_tab_point(fold_point);
905 let wrap_point = self.wrap_snapshot().tab_point_to_wrap_point(tab_point);
906 let block_point = self.block_snapshot.to_block_point(wrap_point);
907 DisplayPoint(block_point)
908 }
909
910 pub fn max_point(&self) -> DisplayPoint {
911 DisplayPoint(self.block_snapshot.max_point())
912 }
913
914 /// Returns text chunks starting at the given display row until the end of the file
915 pub fn text_chunks(&self, display_row: DisplayRow) -> impl Iterator<Item = &str> {
916 self.block_snapshot
917 .chunks(
918 display_row.0..self.max_point().row().next_row().0,
919 false,
920 self.masked,
921 Highlights::default(),
922 )
923 .map(|h| h.text)
924 }
925
926 /// Returns text chunks starting at the end of the given display row in reverse until the start of the file
927 pub fn reverse_text_chunks(&self, display_row: DisplayRow) -> impl Iterator<Item = &str> {
928 (0..=display_row.0).rev().flat_map(move |row| {
929 self.block_snapshot
930 .chunks(row..row + 1, false, self.masked, Highlights::default())
931 .map(|h| h.text)
932 .collect::<Vec<_>>()
933 .into_iter()
934 .rev()
935 })
936 }
937
938 pub fn chunks(
939 &self,
940 display_rows: Range<DisplayRow>,
941 language_aware: bool,
942 highlight_styles: HighlightStyles,
943 ) -> DisplayChunks<'_> {
944 self.block_snapshot.chunks(
945 display_rows.start.0..display_rows.end.0,
946 language_aware,
947 self.masked,
948 Highlights {
949 text_highlights: Some(&self.text_highlights),
950 inlay_highlights: Some(&self.inlay_highlights),
951 styles: highlight_styles,
952 },
953 )
954 }
955
956 pub fn highlighted_chunks<'a>(
957 &'a self,
958 display_rows: Range<DisplayRow>,
959 language_aware: bool,
960 editor_style: &'a EditorStyle,
961 ) -> impl Iterator<Item = HighlightedChunk<'a>> {
962 self.chunks(
963 display_rows,
964 language_aware,
965 HighlightStyles {
966 inlay_hint: Some(editor_style.inlay_hints_style),
967 edit_prediction: Some(editor_style.edit_prediction_styles),
968 },
969 )
970 .flat_map(|chunk| {
971 let highlight_style = chunk
972 .syntax_highlight_id
973 .and_then(|id| id.style(&editor_style.syntax));
974
975 let chunk_highlight = chunk.highlight_style.map(|chunk_highlight| {
976 HighlightStyle {
977 // For color inlays, blend the color with the editor background
978 // if the color has transparency (alpha < 1.0)
979 color: chunk_highlight.color.map(|color| {
980 if chunk.is_inlay && !color.is_opaque() {
981 editor_style.background.blend(color)
982 } else {
983 color
984 }
985 }),
986 ..chunk_highlight
987 }
988 });
989
990 let diagnostic_highlight = chunk
991 .diagnostic_severity
992 .filter(|severity| {
993 self.diagnostics_max_severity
994 .into_lsp()
995 .is_some_and(|max_severity| severity <= &max_severity)
996 })
997 .map(|severity| HighlightStyle {
998 fade_out: chunk
999 .is_unnecessary
1000 .then_some(editor_style.unnecessary_code_fade),
1001 underline: (chunk.underline
1002 && editor_style.show_underlines
1003 && !(chunk.is_unnecessary && severity > lsp::DiagnosticSeverity::WARNING))
1004 .then(|| {
1005 let diagnostic_color =
1006 super::diagnostic_style(severity, &editor_style.status);
1007 UnderlineStyle {
1008 color: Some(diagnostic_color),
1009 thickness: 1.0.into(),
1010 wavy: true,
1011 }
1012 }),
1013 ..Default::default()
1014 });
1015
1016 let style = [highlight_style, chunk_highlight, diagnostic_highlight]
1017 .into_iter()
1018 .flatten()
1019 .reduce(|acc, highlight| acc.highlight(highlight));
1020
1021 HighlightedChunk {
1022 text: chunk.text,
1023 style,
1024 is_tab: chunk.is_tab,
1025 is_inlay: chunk.is_inlay,
1026 replacement: chunk.renderer.map(ChunkReplacement::Renderer),
1027 }
1028 .highlight_invisibles(editor_style)
1029 })
1030 }
1031
1032 pub fn layout_row(
1033 &self,
1034 display_row: DisplayRow,
1035 TextLayoutDetails {
1036 text_system,
1037 editor_style,
1038 rem_size,
1039 scroll_anchor: _,
1040 visible_rows: _,
1041 vertical_scroll_margin: _,
1042 }: &TextLayoutDetails,
1043 ) -> Arc<LineLayout> {
1044 let mut runs = Vec::new();
1045 let mut line = String::new();
1046
1047 let range = display_row..display_row.next_row();
1048 for chunk in self.highlighted_chunks(range, false, editor_style) {
1049 line.push_str(chunk.text);
1050
1051 let text_style = if let Some(style) = chunk.style {
1052 Cow::Owned(editor_style.text.clone().highlight(style))
1053 } else {
1054 Cow::Borrowed(&editor_style.text)
1055 };
1056
1057 runs.push(text_style.to_run(chunk.text.len()))
1058 }
1059
1060 if line.ends_with('\n') {
1061 line.pop();
1062 if let Some(last_run) = runs.last_mut() {
1063 last_run.len -= 1;
1064 if last_run.len == 0 {
1065 runs.pop();
1066 }
1067 }
1068 }
1069
1070 let font_size = editor_style.text.font_size.to_pixels(*rem_size);
1071 text_system.layout_line(&line, font_size, &runs, None)
1072 }
1073
1074 pub fn x_for_display_point(
1075 &self,
1076 display_point: DisplayPoint,
1077 text_layout_details: &TextLayoutDetails,
1078 ) -> Pixels {
1079 let line = self.layout_row(display_point.row(), text_layout_details);
1080 line.x_for_index(display_point.column() as usize)
1081 }
1082
1083 pub fn display_column_for_x(
1084 &self,
1085 display_row: DisplayRow,
1086 x: Pixels,
1087 details: &TextLayoutDetails,
1088 ) -> u32 {
1089 let layout_line = self.layout_row(display_row, details);
1090 layout_line.closest_index_for_x(x) as u32
1091 }
1092
1093 pub fn grapheme_at(&self, mut point: DisplayPoint) -> Option<SharedString> {
1094 point = DisplayPoint(self.block_snapshot.clip_point(point.0, Bias::Left));
1095 let chars = self
1096 .text_chunks(point.row())
1097 .flat_map(str::chars)
1098 .skip_while({
1099 let mut column = 0;
1100 move |char| {
1101 let at_point = column >= point.column();
1102 column += char.len_utf8() as u32;
1103 !at_point
1104 }
1105 })
1106 .take_while({
1107 let mut prev = false;
1108 move |char| {
1109 let now = char.is_ascii();
1110 let end = char.is_ascii() && (char.is_ascii_whitespace() || prev);
1111 prev = now;
1112 !end
1113 }
1114 });
1115 chars.collect::<String>().graphemes(true).next().map(|s| {
1116 if let Some(invisible) = s.chars().next().filter(|&c| is_invisible(c)) {
1117 replacement(invisible).unwrap_or(s).to_owned().into()
1118 } else if s == "\n" {
1119 " ".into()
1120 } else {
1121 s.to_owned().into()
1122 }
1123 })
1124 }
1125
1126 pub fn buffer_chars_at(&self, mut offset: usize) -> impl Iterator<Item = (char, usize)> + '_ {
1127 self.buffer_snapshot().chars_at(offset).map(move |ch| {
1128 let ret = (ch, offset);
1129 offset += ch.len_utf8();
1130 ret
1131 })
1132 }
1133
1134 pub fn reverse_buffer_chars_at(
1135 &self,
1136 mut offset: usize,
1137 ) -> impl Iterator<Item = (char, usize)> + '_ {
1138 self.buffer_snapshot()
1139 .reversed_chars_at(offset)
1140 .map(move |ch| {
1141 offset -= ch.len_utf8();
1142 (ch, offset)
1143 })
1144 }
1145
1146 pub fn clip_point(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
1147 let mut clipped = self.block_snapshot.clip_point(point.0, bias);
1148 if self.clip_at_line_ends {
1149 clipped = self.clip_at_line_end(DisplayPoint(clipped)).0
1150 }
1151 DisplayPoint(clipped)
1152 }
1153
1154 pub fn clip_ignoring_line_ends(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
1155 DisplayPoint(self.block_snapshot.clip_point(point.0, bias))
1156 }
1157
1158 pub fn clip_at_line_end(&self, display_point: DisplayPoint) -> DisplayPoint {
1159 let mut point = self.display_point_to_point(display_point, Bias::Left);
1160
1161 if point.column != self.buffer_snapshot().line_len(MultiBufferRow(point.row)) {
1162 return display_point;
1163 }
1164 point.column = point.column.saturating_sub(1);
1165 point = self.buffer_snapshot().clip_point(point, Bias::Left);
1166 self.point_to_display_point(point, Bias::Left)
1167 }
1168
1169 pub fn folds_in_range<T>(&self, range: Range<T>) -> impl Iterator<Item = &Fold>
1170 where
1171 T: ToOffset,
1172 {
1173 self.fold_snapshot().folds_in_range(range)
1174 }
1175
1176 pub fn blocks_in_range(
1177 &self,
1178 rows: Range<DisplayRow>,
1179 ) -> impl Iterator<Item = (DisplayRow, &Block)> {
1180 self.block_snapshot
1181 .blocks_in_range(rows.start.0..rows.end.0)
1182 .map(|(row, block)| (DisplayRow(row), block))
1183 }
1184
1185 pub fn sticky_header_excerpt(&self, row: f64) -> Option<StickyHeaderExcerpt<'_>> {
1186 self.block_snapshot.sticky_header_excerpt(row)
1187 }
1188
1189 pub fn block_for_id(&self, id: BlockId) -> Option<Block> {
1190 self.block_snapshot.block_for_id(id)
1191 }
1192
1193 pub fn intersects_fold<T: ToOffset>(&self, offset: T) -> bool {
1194 self.fold_snapshot().intersects_fold(offset)
1195 }
1196
1197 pub fn is_line_folded(&self, buffer_row: MultiBufferRow) -> bool {
1198 self.block_snapshot.is_line_replaced(buffer_row)
1199 || self.fold_snapshot().is_line_folded(buffer_row)
1200 }
1201
1202 pub fn is_block_line(&self, display_row: DisplayRow) -> bool {
1203 self.block_snapshot.is_block_line(BlockRow(display_row.0))
1204 }
1205
1206 pub fn is_folded_buffer_header(&self, display_row: DisplayRow) -> bool {
1207 self.block_snapshot
1208 .is_folded_buffer_header(BlockRow(display_row.0))
1209 }
1210
1211 pub fn soft_wrap_indent(&self, display_row: DisplayRow) -> Option<u32> {
1212 let wrap_row = self
1213 .block_snapshot
1214 .to_wrap_point(BlockPoint::new(display_row.0, 0), Bias::Left)
1215 .row();
1216 self.wrap_snapshot().soft_wrap_indent(wrap_row)
1217 }
1218
1219 pub fn text(&self) -> String {
1220 self.text_chunks(DisplayRow(0)).collect()
1221 }
1222
1223 pub fn line(&self, display_row: DisplayRow) -> String {
1224 let mut result = String::new();
1225 for chunk in self.text_chunks(display_row) {
1226 if let Some(ix) = chunk.find('\n') {
1227 result.push_str(&chunk[0..ix]);
1228 break;
1229 } else {
1230 result.push_str(chunk);
1231 }
1232 }
1233 result
1234 }
1235
1236 pub fn line_indent_for_buffer_row(&self, buffer_row: MultiBufferRow) -> LineIndent {
1237 self.buffer_snapshot().line_indent_for_row(buffer_row)
1238 }
1239
1240 pub fn line_len(&self, row: DisplayRow) -> u32 {
1241 self.block_snapshot.line_len(BlockRow(row.0))
1242 }
1243
1244 pub fn longest_row(&self) -> DisplayRow {
1245 DisplayRow(self.block_snapshot.longest_row())
1246 }
1247
1248 pub fn longest_row_in_range(&self, range: Range<DisplayRow>) -> DisplayRow {
1249 let block_range = BlockRow(range.start.0)..BlockRow(range.end.0);
1250 let longest_row = self.block_snapshot.longest_row_in_range(block_range);
1251 DisplayRow(longest_row.0)
1252 }
1253
1254 pub fn starts_indent(&self, buffer_row: MultiBufferRow) -> bool {
1255 let max_row = self.buffer_snapshot().max_row();
1256 if buffer_row >= max_row {
1257 return false;
1258 }
1259
1260 let line_indent = self.line_indent_for_buffer_row(buffer_row);
1261 if line_indent.is_line_blank() {
1262 return false;
1263 }
1264
1265 (buffer_row.0 + 1..=max_row.0)
1266 .find_map(|next_row| {
1267 let next_line_indent = self.line_indent_for_buffer_row(MultiBufferRow(next_row));
1268 if next_line_indent.raw_len() > line_indent.raw_len() {
1269 Some(true)
1270 } else if !next_line_indent.is_line_blank() {
1271 Some(false)
1272 } else {
1273 None
1274 }
1275 })
1276 .unwrap_or(false)
1277 }
1278
1279 pub fn crease_for_buffer_row(&self, buffer_row: MultiBufferRow) -> Option<Crease<Point>> {
1280 let start =
1281 MultiBufferPoint::new(buffer_row.0, self.buffer_snapshot().line_len(buffer_row));
1282 if let Some(crease) = self
1283 .crease_snapshot
1284 .query_row(buffer_row, self.buffer_snapshot())
1285 {
1286 match crease {
1287 Crease::Inline {
1288 range,
1289 placeholder,
1290 render_toggle,
1291 render_trailer,
1292 metadata,
1293 } => Some(Crease::Inline {
1294 range: range.to_point(self.buffer_snapshot()),
1295 placeholder: placeholder.clone(),
1296 render_toggle: render_toggle.clone(),
1297 render_trailer: render_trailer.clone(),
1298 metadata: metadata.clone(),
1299 }),
1300 Crease::Block {
1301 range,
1302 block_height,
1303 block_style,
1304 render_block,
1305 block_priority,
1306 render_toggle,
1307 } => Some(Crease::Block {
1308 range: range.to_point(self.buffer_snapshot()),
1309 block_height: *block_height,
1310 block_style: *block_style,
1311 render_block: render_block.clone(),
1312 block_priority: *block_priority,
1313 render_toggle: render_toggle.clone(),
1314 }),
1315 }
1316 } else if self.starts_indent(MultiBufferRow(start.row))
1317 && !self.is_line_folded(MultiBufferRow(start.row))
1318 {
1319 let start_line_indent = self.line_indent_for_buffer_row(buffer_row);
1320 let max_point = self.buffer_snapshot().max_point();
1321 let mut end = None;
1322
1323 for row in (buffer_row.0 + 1)..=max_point.row {
1324 let line_indent = self.line_indent_for_buffer_row(MultiBufferRow(row));
1325 if !line_indent.is_line_blank()
1326 && line_indent.raw_len() <= start_line_indent.raw_len()
1327 {
1328 let prev_row = row - 1;
1329 end = Some(Point::new(
1330 prev_row,
1331 self.buffer_snapshot().line_len(MultiBufferRow(prev_row)),
1332 ));
1333 break;
1334 }
1335 }
1336
1337 let mut row_before_line_breaks = end.unwrap_or(max_point);
1338 while row_before_line_breaks.row > start.row
1339 && self
1340 .buffer_snapshot()
1341 .is_line_blank(MultiBufferRow(row_before_line_breaks.row))
1342 {
1343 row_before_line_breaks.row -= 1;
1344 }
1345
1346 row_before_line_breaks = Point::new(
1347 row_before_line_breaks.row,
1348 self.buffer_snapshot()
1349 .line_len(MultiBufferRow(row_before_line_breaks.row)),
1350 );
1351
1352 Some(Crease::Inline {
1353 range: start..row_before_line_breaks,
1354 placeholder: self.fold_placeholder.clone(),
1355 render_toggle: None,
1356 render_trailer: None,
1357 metadata: None,
1358 })
1359 } else {
1360 None
1361 }
1362 }
1363
1364 #[cfg(any(test, feature = "test-support"))]
1365 pub fn text_highlight_ranges<Tag: ?Sized + 'static>(
1366 &self,
1367 ) -> Option<Arc<(HighlightStyle, Vec<Range<Anchor>>)>> {
1368 let type_id = TypeId::of::<Tag>();
1369 self.text_highlights
1370 .get(&HighlightKey::Type(type_id))
1371 .cloned()
1372 }
1373
1374 #[allow(unused)]
1375 #[cfg(any(test, feature = "test-support"))]
1376 pub(crate) fn inlay_highlights<Tag: ?Sized + 'static>(
1377 &self,
1378 ) -> Option<&TreeMap<InlayId, (HighlightStyle, InlayHighlight)>> {
1379 let type_id = TypeId::of::<Tag>();
1380 self.inlay_highlights.get(&type_id)
1381 }
1382
1383 pub fn buffer_header_height(&self) -> u32 {
1384 self.block_snapshot.buffer_header_height
1385 }
1386
1387 pub fn excerpt_header_height(&self) -> u32 {
1388 self.block_snapshot.excerpt_header_height
1389 }
1390
1391 /// Given a `DisplayPoint`, returns another `DisplayPoint` corresponding to
1392 /// the start of the buffer row that is a given number of buffer rows away
1393 /// from the provided point.
1394 ///
1395 /// This moves by buffer rows instead of display rows, a distinction that is
1396 /// important when soft wrapping is enabled.
1397 pub fn start_of_relative_buffer_row(&self, point: DisplayPoint, times: isize) -> DisplayPoint {
1398 let start = self.display_point_to_fold_point(point, Bias::Left);
1399 let target = start.row() as isize + times;
1400 let new_row = (target.max(0) as u32).min(self.fold_snapshot().max_point().row());
1401
1402 self.clip_point(
1403 self.fold_point_to_display_point(
1404 self.fold_snapshot()
1405 .clip_point(FoldPoint::new(new_row, 0), Bias::Right),
1406 ),
1407 Bias::Right,
1408 )
1409 }
1410}
1411
1412impl std::ops::Deref for DisplaySnapshot {
1413 type Target = BlockSnapshot;
1414
1415 fn deref(&self) -> &Self::Target {
1416 &self.block_snapshot
1417 }
1418}
1419
1420/// A zero-indexed point in a text buffer consisting of a row and column adjusted for inserted blocks.
1421#[derive(Copy, Clone, Default, Eq, Ord, PartialOrd, PartialEq)]
1422pub struct DisplayPoint(BlockPoint);
1423
1424impl Debug for DisplayPoint {
1425 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
1426 f.write_fmt(format_args!(
1427 "DisplayPoint({}, {})",
1428 self.row().0,
1429 self.column()
1430 ))
1431 }
1432}
1433
1434impl Add for DisplayPoint {
1435 type Output = Self;
1436
1437 fn add(self, other: Self) -> Self::Output {
1438 DisplayPoint(BlockPoint(self.0.0 + other.0.0))
1439 }
1440}
1441
1442impl Sub for DisplayPoint {
1443 type Output = Self;
1444
1445 fn sub(self, other: Self) -> Self::Output {
1446 DisplayPoint(BlockPoint(self.0.0 - other.0.0))
1447 }
1448}
1449
1450#[derive(Debug, Copy, Clone, Default, Eq, Ord, PartialOrd, PartialEq, Deserialize, Hash)]
1451#[serde(transparent)]
1452pub struct DisplayRow(pub u32);
1453
1454impl Add<DisplayRow> for DisplayRow {
1455 type Output = Self;
1456
1457 fn add(self, other: Self) -> Self::Output {
1458 DisplayRow(self.0 + other.0)
1459 }
1460}
1461
1462impl Add<u32> for DisplayRow {
1463 type Output = Self;
1464
1465 fn add(self, other: u32) -> Self::Output {
1466 DisplayRow(self.0 + other)
1467 }
1468}
1469
1470impl Sub<DisplayRow> for DisplayRow {
1471 type Output = Self;
1472
1473 fn sub(self, other: Self) -> Self::Output {
1474 DisplayRow(self.0 - other.0)
1475 }
1476}
1477
1478impl Sub<u32> for DisplayRow {
1479 type Output = Self;
1480
1481 fn sub(self, other: u32) -> Self::Output {
1482 DisplayRow(self.0 - other)
1483 }
1484}
1485
1486impl DisplayPoint {
1487 pub fn new(row: DisplayRow, column: u32) -> Self {
1488 Self(BlockPoint(Point::new(row.0, column)))
1489 }
1490
1491 pub fn zero() -> Self {
1492 Self::new(DisplayRow(0), 0)
1493 }
1494
1495 pub fn is_zero(&self) -> bool {
1496 self.0.is_zero()
1497 }
1498
1499 pub fn row(self) -> DisplayRow {
1500 DisplayRow(self.0.row)
1501 }
1502
1503 pub fn column(self) -> u32 {
1504 self.0.column
1505 }
1506
1507 pub fn row_mut(&mut self) -> &mut u32 {
1508 &mut self.0.row
1509 }
1510
1511 pub fn column_mut(&mut self) -> &mut u32 {
1512 &mut self.0.column
1513 }
1514
1515 pub fn to_point(self, map: &DisplaySnapshot) -> Point {
1516 map.display_point_to_point(self, Bias::Left)
1517 }
1518
1519 pub fn to_offset(self, map: &DisplaySnapshot, bias: Bias) -> usize {
1520 let wrap_point = map.block_snapshot.to_wrap_point(self.0, bias);
1521 let tab_point = map.wrap_snapshot().to_tab_point(wrap_point);
1522 let fold_point = map.tab_snapshot().to_fold_point(tab_point, bias).0;
1523 let inlay_point = fold_point.to_inlay_point(map.fold_snapshot());
1524 map.inlay_snapshot()
1525 .to_buffer_offset(map.inlay_snapshot().to_offset(inlay_point))
1526 }
1527}
1528
1529impl ToDisplayPoint for usize {
1530 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
1531 map.point_to_display_point(self.to_point(map.buffer_snapshot()), Bias::Left)
1532 }
1533}
1534
1535impl ToDisplayPoint for OffsetUtf16 {
1536 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
1537 self.to_offset(map.buffer_snapshot()).to_display_point(map)
1538 }
1539}
1540
1541impl ToDisplayPoint for Point {
1542 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
1543 map.point_to_display_point(*self, Bias::Left)
1544 }
1545}
1546
1547impl ToDisplayPoint for Anchor {
1548 fn to_display_point(&self, map: &DisplaySnapshot) -> DisplayPoint {
1549 self.to_point(map.buffer_snapshot()).to_display_point(map)
1550 }
1551}
1552
1553#[cfg(test)]
1554pub mod tests {
1555 use super::*;
1556 use crate::{
1557 movement,
1558 test::{marked_display_snapshot, test_font},
1559 };
1560 use Bias::*;
1561 use block_map::BlockPlacement;
1562 use gpui::{
1563 App, AppContext as _, BorrowAppContext, Element, Hsla, Rgba, div, font, observe, px,
1564 };
1565 use language::{
1566 Buffer, Diagnostic, DiagnosticEntry, DiagnosticSet, Language, LanguageConfig,
1567 LanguageMatcher,
1568 };
1569 use lsp::LanguageServerId;
1570 use project::Project;
1571 use rand::{Rng, prelude::*};
1572 use rope::Rope;
1573 use settings::{SettingsContent, SettingsStore};
1574 use smol::stream::StreamExt;
1575 use std::{env, sync::Arc};
1576 use text::PointUtf16;
1577 use theme::{LoadThemes, SyntaxTheme};
1578 use unindent::Unindent as _;
1579 use util::test::{marked_text_ranges, sample_text};
1580
1581 #[gpui::test(iterations = 100)]
1582 async fn test_random_display_map(cx: &mut gpui::TestAppContext, mut rng: StdRng) {
1583 cx.background_executor.set_block_on_ticks(0..=50);
1584 let operations = env::var("OPERATIONS")
1585 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
1586 .unwrap_or(10);
1587
1588 let mut tab_size = rng.random_range(1..=4);
1589 let buffer_start_excerpt_header_height = rng.random_range(1..=5);
1590 let excerpt_header_height = rng.random_range(1..=5);
1591 let font_size = px(14.0);
1592 let max_wrap_width = 300.0;
1593 let mut wrap_width = if rng.random_bool(0.1) {
1594 None
1595 } else {
1596 Some(px(rng.random_range(0.0..=max_wrap_width)))
1597 };
1598
1599 log::info!("tab size: {}", tab_size);
1600 log::info!("wrap width: {:?}", wrap_width);
1601
1602 cx.update(|cx| {
1603 init_test(cx, |s| {
1604 s.project.all_languages.defaults.tab_size = NonZeroU32::new(tab_size)
1605 });
1606 });
1607
1608 let buffer = cx.update(|cx| {
1609 if rng.random() {
1610 let len = rng.random_range(0..10);
1611 let text = util::RandomCharIter::new(&mut rng)
1612 .take(len)
1613 .collect::<String>();
1614 MultiBuffer::build_simple(&text, cx)
1615 } else {
1616 MultiBuffer::build_random(&mut rng, cx)
1617 }
1618 });
1619
1620 let font = test_font();
1621 let map = cx.new(|cx| {
1622 DisplayMap::new(
1623 buffer.clone(),
1624 font,
1625 font_size,
1626 wrap_width,
1627 buffer_start_excerpt_header_height,
1628 excerpt_header_height,
1629 FoldPlaceholder::test(),
1630 DiagnosticSeverity::Warning,
1631 cx,
1632 )
1633 });
1634 let mut notifications = observe(&map, cx);
1635 let mut fold_count = 0;
1636 let mut blocks = Vec::new();
1637
1638 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1639 log::info!("buffer text: {:?}", snapshot.buffer_snapshot().text());
1640 log::info!("fold text: {:?}", snapshot.fold_snapshot().text());
1641 log::info!("tab text: {:?}", snapshot.tab_snapshot().text());
1642 log::info!("wrap text: {:?}", snapshot.wrap_snapshot().text());
1643 log::info!("block text: {:?}", snapshot.block_snapshot.text());
1644 log::info!("display text: {:?}", snapshot.text());
1645
1646 for _i in 0..operations {
1647 match rng.random_range(0..100) {
1648 0..=19 => {
1649 wrap_width = if rng.random_bool(0.2) {
1650 None
1651 } else {
1652 Some(px(rng.random_range(0.0..=max_wrap_width)))
1653 };
1654 log::info!("setting wrap width to {:?}", wrap_width);
1655 map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
1656 }
1657 20..=29 => {
1658 let mut tab_sizes = vec![1, 2, 3, 4];
1659 tab_sizes.remove((tab_size - 1) as usize);
1660 tab_size = *tab_sizes.choose(&mut rng).unwrap();
1661 log::info!("setting tab size to {:?}", tab_size);
1662 cx.update(|cx| {
1663 cx.update_global::<SettingsStore, _>(|store, cx| {
1664 store.update_user_settings(cx, |s| {
1665 s.project.all_languages.defaults.tab_size =
1666 NonZeroU32::new(tab_size);
1667 });
1668 });
1669 });
1670 }
1671 30..=44 => {
1672 map.update(cx, |map, cx| {
1673 if rng.random() || blocks.is_empty() {
1674 let snapshot = map.snapshot(cx);
1675 let buffer = snapshot.buffer_snapshot();
1676 let block_properties = (0..rng.random_range(1..=1))
1677 .map(|_| {
1678 let position = buffer.anchor_after(buffer.clip_offset(
1679 rng.random_range(0..=buffer.len()),
1680 Bias::Left,
1681 ));
1682
1683 let placement = if rng.random() {
1684 BlockPlacement::Above(position)
1685 } else {
1686 BlockPlacement::Below(position)
1687 };
1688 let height = rng.random_range(1..5);
1689 log::info!(
1690 "inserting block {:?} with height {}",
1691 placement.as_ref().map(|p| p.to_point(&buffer)),
1692 height
1693 );
1694 let priority = rng.random_range(1..100);
1695 BlockProperties {
1696 placement,
1697 style: BlockStyle::Fixed,
1698 height: Some(height),
1699 render: Arc::new(|_| div().into_any()),
1700 priority,
1701 }
1702 })
1703 .collect::<Vec<_>>();
1704 blocks.extend(map.insert_blocks(block_properties, cx));
1705 } else {
1706 blocks.shuffle(&mut rng);
1707 let remove_count = rng.random_range(1..=4.min(blocks.len()));
1708 let block_ids_to_remove = (0..remove_count)
1709 .map(|_| blocks.remove(rng.random_range(0..blocks.len())))
1710 .collect();
1711 log::info!("removing block ids {:?}", block_ids_to_remove);
1712 map.remove_blocks(block_ids_to_remove, cx);
1713 }
1714 });
1715 }
1716 45..=79 => {
1717 let mut ranges = Vec::new();
1718 for _ in 0..rng.random_range(1..=3) {
1719 buffer.read_with(cx, |buffer, cx| {
1720 let buffer = buffer.read(cx);
1721 let end = buffer.clip_offset(rng.random_range(0..=buffer.len()), Right);
1722 let start = buffer.clip_offset(rng.random_range(0..=end), Left);
1723 ranges.push(start..end);
1724 });
1725 }
1726
1727 if rng.random() && fold_count > 0 {
1728 log::info!("unfolding ranges: {:?}", ranges);
1729 map.update(cx, |map, cx| {
1730 map.unfold_intersecting(ranges, true, cx);
1731 });
1732 } else {
1733 log::info!("folding ranges: {:?}", ranges);
1734 map.update(cx, |map, cx| {
1735 map.fold(
1736 ranges
1737 .into_iter()
1738 .map(|range| Crease::simple(range, FoldPlaceholder::test()))
1739 .collect(),
1740 cx,
1741 );
1742 });
1743 }
1744 }
1745 _ => {
1746 buffer.update(cx, |buffer, cx| buffer.randomly_mutate(&mut rng, 5, cx));
1747 }
1748 }
1749
1750 if map.read_with(cx, |map, cx| map.is_rewrapping(cx)) {
1751 notifications.next().await.unwrap();
1752 }
1753
1754 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1755 fold_count = snapshot.fold_count();
1756 log::info!("buffer text: {:?}", snapshot.buffer_snapshot().text());
1757 log::info!("fold text: {:?}", snapshot.fold_snapshot().text());
1758 log::info!("tab text: {:?}", snapshot.tab_snapshot().text());
1759 log::info!("wrap text: {:?}", snapshot.wrap_snapshot().text());
1760 log::info!("block text: {:?}", snapshot.block_snapshot.text());
1761 log::info!("display text: {:?}", snapshot.text());
1762
1763 // Line boundaries
1764 let buffer = snapshot.buffer_snapshot();
1765 for _ in 0..5 {
1766 let row = rng.random_range(0..=buffer.max_point().row);
1767 let column = rng.random_range(0..=buffer.line_len(MultiBufferRow(row)));
1768 let point = buffer.clip_point(Point::new(row, column), Left);
1769
1770 let (prev_buffer_bound, prev_display_bound) = snapshot.prev_line_boundary(point);
1771 let (next_buffer_bound, next_display_bound) = snapshot.next_line_boundary(point);
1772
1773 assert!(prev_buffer_bound <= point);
1774 assert!(next_buffer_bound >= point);
1775 assert_eq!(prev_buffer_bound.column, 0);
1776 assert_eq!(prev_display_bound.column(), 0);
1777 if next_buffer_bound < buffer.max_point() {
1778 assert_eq!(buffer.chars_at(next_buffer_bound).next(), Some('\n'));
1779 }
1780
1781 assert_eq!(
1782 prev_display_bound,
1783 prev_buffer_bound.to_display_point(&snapshot),
1784 "row boundary before {:?}. reported buffer row boundary: {:?}",
1785 point,
1786 prev_buffer_bound
1787 );
1788 assert_eq!(
1789 next_display_bound,
1790 next_buffer_bound.to_display_point(&snapshot),
1791 "display row boundary after {:?}. reported buffer row boundary: {:?}",
1792 point,
1793 next_buffer_bound
1794 );
1795 assert_eq!(
1796 prev_buffer_bound,
1797 prev_display_bound.to_point(&snapshot),
1798 "row boundary before {:?}. reported display row boundary: {:?}",
1799 point,
1800 prev_display_bound
1801 );
1802 assert_eq!(
1803 next_buffer_bound,
1804 next_display_bound.to_point(&snapshot),
1805 "row boundary after {:?}. reported display row boundary: {:?}",
1806 point,
1807 next_display_bound
1808 );
1809 }
1810
1811 // Movement
1812 let min_point = snapshot.clip_point(DisplayPoint::new(DisplayRow(0), 0), Left);
1813 let max_point = snapshot.clip_point(snapshot.max_point(), Right);
1814 for _ in 0..5 {
1815 let row = rng.random_range(0..=snapshot.max_point().row().0);
1816 let column = rng.random_range(0..=snapshot.line_len(DisplayRow(row)));
1817 let point = snapshot.clip_point(DisplayPoint::new(DisplayRow(row), column), Left);
1818
1819 log::info!("Moving from point {:?}", point);
1820
1821 let moved_right = movement::right(&snapshot, point);
1822 log::info!("Right {:?}", moved_right);
1823 if point < max_point {
1824 assert!(moved_right > point);
1825 if point.column() == snapshot.line_len(point.row())
1826 || snapshot.soft_wrap_indent(point.row()).is_some()
1827 && point.column() == snapshot.line_len(point.row()) - 1
1828 {
1829 assert!(moved_right.row() > point.row());
1830 }
1831 } else {
1832 assert_eq!(moved_right, point);
1833 }
1834
1835 let moved_left = movement::left(&snapshot, point);
1836 log::info!("Left {:?}", moved_left);
1837 if point > min_point {
1838 assert!(moved_left < point);
1839 if point.column() == 0 {
1840 assert!(moved_left.row() < point.row());
1841 }
1842 } else {
1843 assert_eq!(moved_left, point);
1844 }
1845 }
1846 }
1847 }
1848
1849 #[gpui::test(retries = 5)]
1850 async fn test_soft_wraps(cx: &mut gpui::TestAppContext) {
1851 cx.background_executor
1852 .set_block_on_ticks(usize::MAX..=usize::MAX);
1853 cx.update(|cx| {
1854 init_test(cx, |_| {});
1855 });
1856
1857 let mut cx = crate::test::editor_test_context::EditorTestContext::new(cx).await;
1858 let editor = cx.editor.clone();
1859 let window = cx.window;
1860
1861 _ = cx.update_window(window, |_, window, cx| {
1862 let text_layout_details =
1863 editor.update(cx, |editor, _cx| editor.text_layout_details(window));
1864
1865 let font_size = px(12.0);
1866 let wrap_width = Some(px(96.));
1867
1868 let text = "one two three four five\nsix seven eight";
1869 let buffer = MultiBuffer::build_simple(text, cx);
1870 let map = cx.new(|cx| {
1871 DisplayMap::new(
1872 buffer.clone(),
1873 font("Helvetica"),
1874 font_size,
1875 wrap_width,
1876 1,
1877 1,
1878 FoldPlaceholder::test(),
1879 DiagnosticSeverity::Warning,
1880 cx,
1881 )
1882 });
1883
1884 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1885 assert_eq!(
1886 snapshot.text_chunks(DisplayRow(0)).collect::<String>(),
1887 "one two \nthree four \nfive\nsix seven \neight"
1888 );
1889 assert_eq!(
1890 snapshot.clip_point(DisplayPoint::new(DisplayRow(0), 8), Bias::Left),
1891 DisplayPoint::new(DisplayRow(0), 7)
1892 );
1893 assert_eq!(
1894 snapshot.clip_point(DisplayPoint::new(DisplayRow(0), 8), Bias::Right),
1895 DisplayPoint::new(DisplayRow(1), 0)
1896 );
1897 assert_eq!(
1898 movement::right(&snapshot, DisplayPoint::new(DisplayRow(0), 7)),
1899 DisplayPoint::new(DisplayRow(1), 0)
1900 );
1901 assert_eq!(
1902 movement::left(&snapshot, DisplayPoint::new(DisplayRow(1), 0)),
1903 DisplayPoint::new(DisplayRow(0), 7)
1904 );
1905
1906 let x = snapshot
1907 .x_for_display_point(DisplayPoint::new(DisplayRow(1), 10), &text_layout_details);
1908 assert_eq!(
1909 movement::up(
1910 &snapshot,
1911 DisplayPoint::new(DisplayRow(1), 10),
1912 language::SelectionGoal::None,
1913 false,
1914 &text_layout_details,
1915 ),
1916 (
1917 DisplayPoint::new(DisplayRow(0), 7),
1918 language::SelectionGoal::HorizontalPosition(f64::from(x))
1919 )
1920 );
1921 assert_eq!(
1922 movement::down(
1923 &snapshot,
1924 DisplayPoint::new(DisplayRow(0), 7),
1925 language::SelectionGoal::HorizontalPosition(f64::from(x)),
1926 false,
1927 &text_layout_details
1928 ),
1929 (
1930 DisplayPoint::new(DisplayRow(1), 10),
1931 language::SelectionGoal::HorizontalPosition(f64::from(x))
1932 )
1933 );
1934 assert_eq!(
1935 movement::down(
1936 &snapshot,
1937 DisplayPoint::new(DisplayRow(1), 10),
1938 language::SelectionGoal::HorizontalPosition(f64::from(x)),
1939 false,
1940 &text_layout_details
1941 ),
1942 (
1943 DisplayPoint::new(DisplayRow(2), 4),
1944 language::SelectionGoal::HorizontalPosition(f64::from(x))
1945 )
1946 );
1947
1948 let ix = snapshot.buffer_snapshot().text().find("seven").unwrap();
1949 buffer.update(cx, |buffer, cx| {
1950 buffer.edit([(ix..ix, "and ")], None, cx);
1951 });
1952
1953 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1954 assert_eq!(
1955 snapshot.text_chunks(DisplayRow(1)).collect::<String>(),
1956 "three four \nfive\nsix and \nseven eight"
1957 );
1958
1959 // Re-wrap on font size changes
1960 map.update(cx, |map, cx| {
1961 map.set_font(font("Helvetica"), font_size + Pixels::from(3.), cx)
1962 });
1963
1964 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
1965 assert_eq!(
1966 snapshot.text_chunks(DisplayRow(1)).collect::<String>(),
1967 "three \nfour five\nsix and \nseven \neight"
1968 )
1969 });
1970 }
1971
1972 #[gpui::test]
1973 fn test_text_chunks(cx: &mut gpui::App) {
1974 init_test(cx, |_| {});
1975
1976 let text = sample_text(6, 6, 'a');
1977 let buffer = MultiBuffer::build_simple(&text, cx);
1978
1979 let font_size = px(14.0);
1980 let map = cx.new(|cx| {
1981 DisplayMap::new(
1982 buffer.clone(),
1983 font("Helvetica"),
1984 font_size,
1985 None,
1986 1,
1987 1,
1988 FoldPlaceholder::test(),
1989 DiagnosticSeverity::Warning,
1990 cx,
1991 )
1992 });
1993
1994 buffer.update(cx, |buffer, cx| {
1995 buffer.edit(
1996 vec![
1997 (
1998 MultiBufferPoint::new(1, 0)..MultiBufferPoint::new(1, 0),
1999 "\t",
2000 ),
2001 (
2002 MultiBufferPoint::new(1, 1)..MultiBufferPoint::new(1, 1),
2003 "\t",
2004 ),
2005 (
2006 MultiBufferPoint::new(2, 1)..MultiBufferPoint::new(2, 1),
2007 "\t",
2008 ),
2009 ],
2010 None,
2011 cx,
2012 )
2013 });
2014
2015 assert_eq!(
2016 map.update(cx, |map, cx| map.snapshot(cx))
2017 .text_chunks(DisplayRow(1))
2018 .collect::<String>()
2019 .lines()
2020 .next(),
2021 Some(" b bbbbb")
2022 );
2023 assert_eq!(
2024 map.update(cx, |map, cx| map.snapshot(cx))
2025 .text_chunks(DisplayRow(2))
2026 .collect::<String>()
2027 .lines()
2028 .next(),
2029 Some("c ccccc")
2030 );
2031 }
2032
2033 #[gpui::test]
2034 fn test_inlays_with_newlines_after_blocks(cx: &mut gpui::TestAppContext) {
2035 cx.update(|cx| init_test(cx, |_| {}));
2036
2037 let buffer = cx.new(|cx| Buffer::local("a", cx));
2038 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2039 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
2040
2041 let font_size = px(14.0);
2042 let map = cx.new(|cx| {
2043 DisplayMap::new(
2044 buffer.clone(),
2045 font("Helvetica"),
2046 font_size,
2047 None,
2048 1,
2049 1,
2050 FoldPlaceholder::test(),
2051 DiagnosticSeverity::Warning,
2052 cx,
2053 )
2054 });
2055
2056 map.update(cx, |map, cx| {
2057 map.insert_blocks(
2058 [BlockProperties {
2059 placement: BlockPlacement::Above(
2060 buffer_snapshot.anchor_before(Point::new(0, 0)),
2061 ),
2062 height: Some(2),
2063 style: BlockStyle::Sticky,
2064 render: Arc::new(|_| div().into_any()),
2065 priority: 0,
2066 }],
2067 cx,
2068 );
2069 });
2070 map.update(cx, |m, cx| assert_eq!(m.snapshot(cx).text(), "\n\na"));
2071
2072 map.update(cx, |map, cx| {
2073 map.splice_inlays(
2074 &[],
2075 vec![Inlay::edit_prediction(
2076 0,
2077 buffer_snapshot.anchor_after(0),
2078 Rope::from_str_small("\n"),
2079 )],
2080 cx,
2081 );
2082 });
2083 map.update(cx, |m, cx| assert_eq!(m.snapshot(cx).text(), "\n\n\na"));
2084
2085 // Regression test: updating the display map does not crash when a
2086 // block is immediately followed by a multi-line inlay.
2087 buffer.update(cx, |buffer, cx| {
2088 buffer.edit([(1..1, "b")], None, cx);
2089 });
2090 map.update(cx, |m, cx| assert_eq!(m.snapshot(cx).text(), "\n\n\nab"));
2091 }
2092
2093 #[gpui::test]
2094 async fn test_chunks(cx: &mut gpui::TestAppContext) {
2095 let text = r#"
2096 fn outer() {}
2097
2098 mod module {
2099 fn inner() {}
2100 }"#
2101 .unindent();
2102
2103 let theme =
2104 SyntaxTheme::new_test(vec![("mod.body", Hsla::red()), ("fn.name", Hsla::blue())]);
2105 let language = Arc::new(
2106 Language::new(
2107 LanguageConfig {
2108 name: "Test".into(),
2109 matcher: LanguageMatcher {
2110 path_suffixes: vec![".test".to_string()],
2111 ..Default::default()
2112 },
2113 ..Default::default()
2114 },
2115 Some(tree_sitter_rust::LANGUAGE.into()),
2116 )
2117 .with_highlights_query(
2118 r#"
2119 (mod_item name: (identifier) body: _ @mod.body)
2120 (function_item name: (identifier) @fn.name)
2121 "#,
2122 )
2123 .unwrap(),
2124 );
2125 language.set_theme(&theme);
2126
2127 cx.update(|cx| {
2128 init_test(cx, |s| {
2129 s.project.all_languages.defaults.tab_size = Some(2.try_into().unwrap())
2130 })
2131 });
2132
2133 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
2134 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
2135 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2136
2137 let font_size = px(14.0);
2138
2139 let map = cx.new(|cx| {
2140 DisplayMap::new(
2141 buffer,
2142 font("Helvetica"),
2143 font_size,
2144 None,
2145 1,
2146 1,
2147 FoldPlaceholder::test(),
2148 DiagnosticSeverity::Warning,
2149 cx,
2150 )
2151 });
2152 assert_eq!(
2153 cx.update(|cx| syntax_chunks(DisplayRow(0)..DisplayRow(5), &map, &theme, cx)),
2154 vec![
2155 ("fn ".to_string(), None),
2156 ("outer".to_string(), Some(Hsla::blue())),
2157 ("() {}\n\nmod module ".to_string(), None),
2158 ("{\n fn ".to_string(), Some(Hsla::red())),
2159 ("inner".to_string(), Some(Hsla::blue())),
2160 ("() {}\n}".to_string(), Some(Hsla::red())),
2161 ]
2162 );
2163 assert_eq!(
2164 cx.update(|cx| syntax_chunks(DisplayRow(3)..DisplayRow(5), &map, &theme, cx)),
2165 vec![
2166 (" fn ".to_string(), Some(Hsla::red())),
2167 ("inner".to_string(), Some(Hsla::blue())),
2168 ("() {}\n}".to_string(), Some(Hsla::red())),
2169 ]
2170 );
2171
2172 map.update(cx, |map, cx| {
2173 map.fold(
2174 vec![Crease::simple(
2175 MultiBufferPoint::new(0, 6)..MultiBufferPoint::new(3, 2),
2176 FoldPlaceholder::test(),
2177 )],
2178 cx,
2179 )
2180 });
2181 assert_eq!(
2182 cx.update(|cx| syntax_chunks(DisplayRow(0)..DisplayRow(2), &map, &theme, cx)),
2183 vec![
2184 ("fn ".to_string(), None),
2185 ("out".to_string(), Some(Hsla::blue())),
2186 ("⋯".to_string(), None),
2187 (" fn ".to_string(), Some(Hsla::red())),
2188 ("inner".to_string(), Some(Hsla::blue())),
2189 ("() {}\n}".to_string(), Some(Hsla::red())),
2190 ]
2191 );
2192 }
2193
2194 #[gpui::test]
2195 async fn test_chunks_with_syntax_highlighting_across_blocks(cx: &mut gpui::TestAppContext) {
2196 cx.background_executor
2197 .set_block_on_ticks(usize::MAX..=usize::MAX);
2198
2199 let text = r#"
2200 const A: &str = "
2201 one
2202 two
2203 three
2204 ";
2205 const B: &str = "four";
2206 "#
2207 .unindent();
2208
2209 let theme = SyntaxTheme::new_test(vec![
2210 ("string", Hsla::red()),
2211 ("punctuation", Hsla::blue()),
2212 ("keyword", Hsla::green()),
2213 ]);
2214 let language = Arc::new(
2215 Language::new(
2216 LanguageConfig {
2217 name: "Rust".into(),
2218 ..Default::default()
2219 },
2220 Some(tree_sitter_rust::LANGUAGE.into()),
2221 )
2222 .with_highlights_query(
2223 r#"
2224 (string_literal) @string
2225 "const" @keyword
2226 [":" ";"] @punctuation
2227 "#,
2228 )
2229 .unwrap(),
2230 );
2231 language.set_theme(&theme);
2232
2233 cx.update(|cx| init_test(cx, |_| {}));
2234
2235 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
2236 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
2237 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2238 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
2239
2240 let map = cx.new(|cx| {
2241 DisplayMap::new(
2242 buffer,
2243 font("Courier"),
2244 px(16.0),
2245 None,
2246 1,
2247 1,
2248 FoldPlaceholder::test(),
2249 DiagnosticSeverity::Warning,
2250 cx,
2251 )
2252 });
2253
2254 // Insert two blocks in the middle of a multi-line string literal.
2255 // The second block has zero height.
2256 map.update(cx, |map, cx| {
2257 map.insert_blocks(
2258 [
2259 BlockProperties {
2260 placement: BlockPlacement::Below(
2261 buffer_snapshot.anchor_before(Point::new(1, 0)),
2262 ),
2263 height: Some(1),
2264 style: BlockStyle::Sticky,
2265 render: Arc::new(|_| div().into_any()),
2266 priority: 0,
2267 },
2268 BlockProperties {
2269 placement: BlockPlacement::Below(
2270 buffer_snapshot.anchor_before(Point::new(2, 0)),
2271 ),
2272 height: None,
2273 style: BlockStyle::Sticky,
2274 render: Arc::new(|_| div().into_any()),
2275 priority: 0,
2276 },
2277 ],
2278 cx,
2279 )
2280 });
2281
2282 pretty_assertions::assert_eq!(
2283 cx.update(|cx| syntax_chunks(DisplayRow(0)..DisplayRow(7), &map, &theme, cx)),
2284 [
2285 ("const".into(), Some(Hsla::green())),
2286 (" A".into(), None),
2287 (":".into(), Some(Hsla::blue())),
2288 (" &str = ".into(), None),
2289 ("\"\n one\n".into(), Some(Hsla::red())),
2290 ("\n".into(), None),
2291 (" two\n three\n\"".into(), Some(Hsla::red())),
2292 (";".into(), Some(Hsla::blue())),
2293 ("\n".into(), None),
2294 ("const".into(), Some(Hsla::green())),
2295 (" B".into(), None),
2296 (":".into(), Some(Hsla::blue())),
2297 (" &str = ".into(), None),
2298 ("\"four\"".into(), Some(Hsla::red())),
2299 (";".into(), Some(Hsla::blue())),
2300 ("\n".into(), None),
2301 ]
2302 );
2303 }
2304
2305 #[gpui::test]
2306 async fn test_chunks_with_diagnostics_across_blocks(cx: &mut gpui::TestAppContext) {
2307 cx.background_executor
2308 .set_block_on_ticks(usize::MAX..=usize::MAX);
2309
2310 let text = r#"
2311 struct A {
2312 b: usize;
2313 }
2314 const c: usize = 1;
2315 "#
2316 .unindent();
2317
2318 cx.update(|cx| init_test(cx, |_| {}));
2319
2320 let buffer = cx.new(|cx| Buffer::local(text, cx));
2321
2322 buffer.update(cx, |buffer, cx| {
2323 buffer.update_diagnostics(
2324 LanguageServerId(0),
2325 DiagnosticSet::new(
2326 [DiagnosticEntry {
2327 range: PointUtf16::new(0, 0)..PointUtf16::new(2, 1),
2328 diagnostic: Diagnostic {
2329 severity: lsp::DiagnosticSeverity::ERROR,
2330 group_id: 1,
2331 message: "hi".into(),
2332 ..Default::default()
2333 },
2334 }],
2335 buffer,
2336 ),
2337 cx,
2338 )
2339 });
2340
2341 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2342 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
2343
2344 let map = cx.new(|cx| {
2345 DisplayMap::new(
2346 buffer,
2347 font("Courier"),
2348 px(16.0),
2349 None,
2350 1,
2351 1,
2352 FoldPlaceholder::test(),
2353 DiagnosticSeverity::Warning,
2354 cx,
2355 )
2356 });
2357
2358 let black = gpui::black().to_rgb();
2359 let red = gpui::red().to_rgb();
2360
2361 // Insert a block in the middle of a multi-line diagnostic.
2362 map.update(cx, |map, cx| {
2363 map.highlight_text(
2364 HighlightKey::Type(TypeId::of::<usize>()),
2365 vec![
2366 buffer_snapshot.anchor_before(Point::new(3, 9))
2367 ..buffer_snapshot.anchor_after(Point::new(3, 14)),
2368 buffer_snapshot.anchor_before(Point::new(3, 17))
2369 ..buffer_snapshot.anchor_after(Point::new(3, 18)),
2370 ],
2371 red.into(),
2372 );
2373 map.insert_blocks(
2374 [BlockProperties {
2375 placement: BlockPlacement::Below(
2376 buffer_snapshot.anchor_before(Point::new(1, 0)),
2377 ),
2378 height: Some(1),
2379 style: BlockStyle::Sticky,
2380 render: Arc::new(|_| div().into_any()),
2381 priority: 0,
2382 }],
2383 cx,
2384 )
2385 });
2386
2387 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
2388 let mut chunks = Vec::<(String, Option<lsp::DiagnosticSeverity>, Rgba)>::new();
2389 for chunk in snapshot.chunks(DisplayRow(0)..DisplayRow(5), true, Default::default()) {
2390 let color = chunk
2391 .highlight_style
2392 .and_then(|style| style.color)
2393 .map_or(black, |color| color.to_rgb());
2394 if let Some((last_chunk, last_severity, last_color)) = chunks.last_mut()
2395 && *last_severity == chunk.diagnostic_severity
2396 && *last_color == color
2397 {
2398 last_chunk.push_str(chunk.text);
2399 continue;
2400 }
2401
2402 chunks.push((chunk.text.to_string(), chunk.diagnostic_severity, color));
2403 }
2404
2405 assert_eq!(
2406 chunks,
2407 [
2408 (
2409 "struct A {\n b: usize;\n".into(),
2410 Some(lsp::DiagnosticSeverity::ERROR),
2411 black
2412 ),
2413 ("\n".into(), None, black),
2414 ("}".into(), Some(lsp::DiagnosticSeverity::ERROR), black),
2415 ("\nconst c: ".into(), None, black),
2416 ("usize".into(), None, red),
2417 (" = ".into(), None, black),
2418 ("1".into(), None, red),
2419 (";\n".into(), None, black),
2420 ]
2421 );
2422 }
2423
2424 #[gpui::test]
2425 async fn test_point_translation_with_replace_blocks(cx: &mut gpui::TestAppContext) {
2426 cx.background_executor
2427 .set_block_on_ticks(usize::MAX..=usize::MAX);
2428
2429 cx.update(|cx| init_test(cx, |_| {}));
2430
2431 let buffer = cx.update(|cx| MultiBuffer::build_simple("abcde\nfghij\nklmno\npqrst", cx));
2432 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
2433 let map = cx.new(|cx| {
2434 DisplayMap::new(
2435 buffer.clone(),
2436 font("Courier"),
2437 px(16.0),
2438 None,
2439 1,
2440 1,
2441 FoldPlaceholder::test(),
2442 DiagnosticSeverity::Warning,
2443 cx,
2444 )
2445 });
2446
2447 let snapshot = map.update(cx, |map, cx| {
2448 map.insert_blocks(
2449 [BlockProperties {
2450 placement: BlockPlacement::Replace(
2451 buffer_snapshot.anchor_before(Point::new(1, 2))
2452 ..=buffer_snapshot.anchor_after(Point::new(2, 3)),
2453 ),
2454 height: Some(4),
2455 style: BlockStyle::Fixed,
2456 render: Arc::new(|_| div().into_any()),
2457 priority: 0,
2458 }],
2459 cx,
2460 );
2461 map.snapshot(cx)
2462 });
2463
2464 assert_eq!(snapshot.text(), "abcde\n\n\n\n\npqrst");
2465
2466 let point_to_display_points = [
2467 (Point::new(1, 0), DisplayPoint::new(DisplayRow(1), 0)),
2468 (Point::new(2, 0), DisplayPoint::new(DisplayRow(1), 0)),
2469 (Point::new(3, 0), DisplayPoint::new(DisplayRow(5), 0)),
2470 ];
2471 for (buffer_point, display_point) in point_to_display_points {
2472 assert_eq!(
2473 snapshot.point_to_display_point(buffer_point, Bias::Left),
2474 display_point,
2475 "point_to_display_point({:?}, Bias::Left)",
2476 buffer_point
2477 );
2478 assert_eq!(
2479 snapshot.point_to_display_point(buffer_point, Bias::Right),
2480 display_point,
2481 "point_to_display_point({:?}, Bias::Right)",
2482 buffer_point
2483 );
2484 }
2485
2486 let display_points_to_points = [
2487 (
2488 DisplayPoint::new(DisplayRow(1), 0),
2489 Point::new(1, 0),
2490 Point::new(2, 5),
2491 ),
2492 (
2493 DisplayPoint::new(DisplayRow(2), 0),
2494 Point::new(1, 0),
2495 Point::new(2, 5),
2496 ),
2497 (
2498 DisplayPoint::new(DisplayRow(3), 0),
2499 Point::new(1, 0),
2500 Point::new(2, 5),
2501 ),
2502 (
2503 DisplayPoint::new(DisplayRow(4), 0),
2504 Point::new(1, 0),
2505 Point::new(2, 5),
2506 ),
2507 (
2508 DisplayPoint::new(DisplayRow(5), 0),
2509 Point::new(3, 0),
2510 Point::new(3, 0),
2511 ),
2512 ];
2513 for (display_point, left_buffer_point, right_buffer_point) in display_points_to_points {
2514 assert_eq!(
2515 snapshot.display_point_to_point(display_point, Bias::Left),
2516 left_buffer_point,
2517 "display_point_to_point({:?}, Bias::Left)",
2518 display_point
2519 );
2520 assert_eq!(
2521 snapshot.display_point_to_point(display_point, Bias::Right),
2522 right_buffer_point,
2523 "display_point_to_point({:?}, Bias::Right)",
2524 display_point
2525 );
2526 }
2527 }
2528
2529 #[gpui::test]
2530 async fn test_chunks_with_soft_wrapping(cx: &mut gpui::TestAppContext) {
2531 cx.background_executor
2532 .set_block_on_ticks(usize::MAX..=usize::MAX);
2533
2534 let text = r#"
2535 fn outer() {}
2536
2537 mod module {
2538 fn inner() {}
2539 }"#
2540 .unindent();
2541
2542 let theme =
2543 SyntaxTheme::new_test(vec![("mod.body", Hsla::red()), ("fn.name", Hsla::blue())]);
2544 let language = Arc::new(
2545 Language::new(
2546 LanguageConfig {
2547 name: "Test".into(),
2548 matcher: LanguageMatcher {
2549 path_suffixes: vec![".test".to_string()],
2550 ..Default::default()
2551 },
2552 ..Default::default()
2553 },
2554 Some(tree_sitter_rust::LANGUAGE.into()),
2555 )
2556 .with_highlights_query(
2557 r#"
2558 (mod_item name: (identifier) body: _ @mod.body)
2559 (function_item name: (identifier) @fn.name)
2560 "#,
2561 )
2562 .unwrap(),
2563 );
2564 language.set_theme(&theme);
2565
2566 cx.update(|cx| init_test(cx, |_| {}));
2567
2568 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
2569 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
2570 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2571
2572 let font_size = px(16.0);
2573
2574 let map = cx.new(|cx| {
2575 DisplayMap::new(
2576 buffer,
2577 font("Courier"),
2578 font_size,
2579 Some(px(40.0)),
2580 1,
2581 1,
2582 FoldPlaceholder::test(),
2583 DiagnosticSeverity::Warning,
2584 cx,
2585 )
2586 });
2587 assert_eq!(
2588 cx.update(|cx| syntax_chunks(DisplayRow(0)..DisplayRow(5), &map, &theme, cx)),
2589 [
2590 ("fn \n".to_string(), None),
2591 ("oute".to_string(), Some(Hsla::blue())),
2592 ("\n".to_string(), None),
2593 ("r".to_string(), Some(Hsla::blue())),
2594 ("() \n{}\n\n".to_string(), None),
2595 ]
2596 );
2597 assert_eq!(
2598 cx.update(|cx| syntax_chunks(DisplayRow(3)..DisplayRow(5), &map, &theme, cx)),
2599 [("{}\n\n".to_string(), None)]
2600 );
2601
2602 map.update(cx, |map, cx| {
2603 map.fold(
2604 vec![Crease::simple(
2605 MultiBufferPoint::new(0, 6)..MultiBufferPoint::new(3, 2),
2606 FoldPlaceholder::test(),
2607 )],
2608 cx,
2609 )
2610 });
2611 assert_eq!(
2612 cx.update(|cx| syntax_chunks(DisplayRow(1)..DisplayRow(4), &map, &theme, cx)),
2613 [
2614 ("out".to_string(), Some(Hsla::blue())),
2615 ("⋯\n".to_string(), None),
2616 (" ".to_string(), Some(Hsla::red())),
2617 ("\n".to_string(), None),
2618 ("fn ".to_string(), Some(Hsla::red())),
2619 ("i".to_string(), Some(Hsla::blue())),
2620 ("\n".to_string(), None)
2621 ]
2622 );
2623 }
2624
2625 #[gpui::test]
2626 async fn test_chunks_with_text_highlights(cx: &mut gpui::TestAppContext) {
2627 cx.update(|cx| init_test(cx, |_| {}));
2628
2629 let theme =
2630 SyntaxTheme::new_test(vec![("operator", Hsla::red()), ("string", Hsla::green())]);
2631 let language = Arc::new(
2632 Language::new(
2633 LanguageConfig {
2634 name: "Test".into(),
2635 matcher: LanguageMatcher {
2636 path_suffixes: vec![".test".to_string()],
2637 ..Default::default()
2638 },
2639 ..Default::default()
2640 },
2641 Some(tree_sitter_rust::LANGUAGE.into()),
2642 )
2643 .with_highlights_query(
2644 r#"
2645 ":" @operator
2646 (string_literal) @string
2647 "#,
2648 )
2649 .unwrap(),
2650 );
2651 language.set_theme(&theme);
2652
2653 let (text, highlighted_ranges) = marked_text_ranges(r#"constˇ «a»«:» B = "c «d»""#, false);
2654
2655 let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
2656 cx.condition(&buffer, |buf, _| !buf.is_parsing()).await;
2657
2658 let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
2659 let buffer_snapshot = buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx));
2660
2661 let font_size = px(16.0);
2662 let map = cx.new(|cx| {
2663 DisplayMap::new(
2664 buffer,
2665 font("Courier"),
2666 font_size,
2667 None,
2668 1,
2669 1,
2670 FoldPlaceholder::test(),
2671 DiagnosticSeverity::Warning,
2672 cx,
2673 )
2674 });
2675
2676 enum MyType {}
2677
2678 let style = HighlightStyle {
2679 color: Some(Hsla::blue()),
2680 ..Default::default()
2681 };
2682
2683 map.update(cx, |map, _cx| {
2684 map.highlight_text(
2685 HighlightKey::Type(TypeId::of::<MyType>()),
2686 highlighted_ranges
2687 .into_iter()
2688 .map(|range| {
2689 buffer_snapshot.anchor_before(range.start)
2690 ..buffer_snapshot.anchor_before(range.end)
2691 })
2692 .collect(),
2693 style,
2694 );
2695 });
2696
2697 assert_eq!(
2698 cx.update(|cx| chunks(DisplayRow(0)..DisplayRow(10), &map, &theme, cx)),
2699 [
2700 ("const ".to_string(), None, None),
2701 ("a".to_string(), None, Some(Hsla::blue())),
2702 (":".to_string(), Some(Hsla::red()), Some(Hsla::blue())),
2703 (" B = ".to_string(), None, None),
2704 ("\"c ".to_string(), Some(Hsla::green()), None),
2705 ("d".to_string(), Some(Hsla::green()), Some(Hsla::blue())),
2706 ("\"".to_string(), Some(Hsla::green()), None),
2707 ]
2708 );
2709 }
2710
2711 #[gpui::test]
2712 fn test_clip_point(cx: &mut gpui::App) {
2713 init_test(cx, |_| {});
2714
2715 fn assert(text: &str, shift_right: bool, bias: Bias, cx: &mut gpui::App) {
2716 let (unmarked_snapshot, mut markers) = marked_display_snapshot(text, cx);
2717
2718 match bias {
2719 Bias::Left => {
2720 if shift_right {
2721 *markers[1].column_mut() += 1;
2722 }
2723
2724 assert_eq!(unmarked_snapshot.clip_point(markers[1], bias), markers[0])
2725 }
2726 Bias::Right => {
2727 if shift_right {
2728 *markers[0].column_mut() += 1;
2729 }
2730
2731 assert_eq!(unmarked_snapshot.clip_point(markers[0], bias), markers[1])
2732 }
2733 };
2734 }
2735
2736 use Bias::{Left, Right};
2737 assert("ˇˇα", false, Left, cx);
2738 assert("ˇˇα", true, Left, cx);
2739 assert("ˇˇα", false, Right, cx);
2740 assert("ˇαˇ", true, Right, cx);
2741 assert("ˇˇ✋", false, Left, cx);
2742 assert("ˇˇ✋", true, Left, cx);
2743 assert("ˇˇ✋", false, Right, cx);
2744 assert("ˇ✋ˇ", true, Right, cx);
2745 assert("ˇˇ🍐", false, Left, cx);
2746 assert("ˇˇ🍐", true, Left, cx);
2747 assert("ˇˇ🍐", false, Right, cx);
2748 assert("ˇ🍐ˇ", true, Right, cx);
2749 assert("ˇˇ\t", false, Left, cx);
2750 assert("ˇˇ\t", true, Left, cx);
2751 assert("ˇˇ\t", false, Right, cx);
2752 assert("ˇ\tˇ", true, Right, cx);
2753 assert(" ˇˇ\t", false, Left, cx);
2754 assert(" ˇˇ\t", true, Left, cx);
2755 assert(" ˇˇ\t", false, Right, cx);
2756 assert(" ˇ\tˇ", true, Right, cx);
2757 assert(" ˇˇ\t", false, Left, cx);
2758 assert(" ˇˇ\t", false, Right, cx);
2759 }
2760
2761 #[gpui::test]
2762 fn test_clip_at_line_ends(cx: &mut gpui::App) {
2763 init_test(cx, |_| {});
2764
2765 fn assert(text: &str, cx: &mut gpui::App) {
2766 let (mut unmarked_snapshot, markers) = marked_display_snapshot(text, cx);
2767 unmarked_snapshot.clip_at_line_ends = true;
2768 assert_eq!(
2769 unmarked_snapshot.clip_point(markers[1], Bias::Left),
2770 markers[0]
2771 );
2772 }
2773
2774 assert("ˇˇ", cx);
2775 assert("ˇaˇ", cx);
2776 assert("aˇbˇ", cx);
2777 assert("aˇαˇ", cx);
2778 }
2779
2780 #[gpui::test]
2781 fn test_creases(cx: &mut gpui::App) {
2782 init_test(cx, |_| {});
2783
2784 let text = "aaa\nbbb\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj\nkkk\nlll";
2785 let buffer = MultiBuffer::build_simple(text, cx);
2786 let font_size = px(14.0);
2787 cx.new(|cx| {
2788 let mut map = DisplayMap::new(
2789 buffer.clone(),
2790 font("Helvetica"),
2791 font_size,
2792 None,
2793 1,
2794 1,
2795 FoldPlaceholder::test(),
2796 DiagnosticSeverity::Warning,
2797 cx,
2798 );
2799 let snapshot = map.buffer.read(cx).snapshot(cx);
2800 let range =
2801 snapshot.anchor_before(Point::new(2, 0))..snapshot.anchor_after(Point::new(3, 3));
2802
2803 map.crease_map.insert(
2804 [Crease::inline(
2805 range,
2806 FoldPlaceholder::test(),
2807 |_row, _status, _toggle, _window, _cx| div(),
2808 |_row, _status, _window, _cx| div(),
2809 )],
2810 &map.buffer.read(cx).snapshot(cx),
2811 );
2812
2813 map
2814 });
2815 }
2816
2817 #[gpui::test]
2818 fn test_tabs_with_multibyte_chars(cx: &mut gpui::App) {
2819 init_test(cx, |_| {});
2820
2821 let text = "✅\t\tα\nβ\t\n🏀β\t\tγ";
2822 let buffer = MultiBuffer::build_simple(text, cx);
2823 let font_size = px(14.0);
2824
2825 let map = cx.new(|cx| {
2826 DisplayMap::new(
2827 buffer.clone(),
2828 font("Helvetica"),
2829 font_size,
2830 None,
2831 1,
2832 1,
2833 FoldPlaceholder::test(),
2834 DiagnosticSeverity::Warning,
2835 cx,
2836 )
2837 });
2838 let map = map.update(cx, |map, cx| map.snapshot(cx));
2839 assert_eq!(map.text(), "✅ α\nβ \n🏀β γ");
2840 assert_eq!(
2841 map.text_chunks(DisplayRow(0)).collect::<String>(),
2842 "✅ α\nβ \n🏀β γ"
2843 );
2844 assert_eq!(
2845 map.text_chunks(DisplayRow(1)).collect::<String>(),
2846 "β \n🏀β γ"
2847 );
2848 assert_eq!(
2849 map.text_chunks(DisplayRow(2)).collect::<String>(),
2850 "🏀β γ"
2851 );
2852
2853 let point = MultiBufferPoint::new(0, "✅\t\t".len() as u32);
2854 let display_point = DisplayPoint::new(DisplayRow(0), "✅ ".len() as u32);
2855 assert_eq!(point.to_display_point(&map), display_point);
2856 assert_eq!(display_point.to_point(&map), point);
2857
2858 let point = MultiBufferPoint::new(1, "β\t".len() as u32);
2859 let display_point = DisplayPoint::new(DisplayRow(1), "β ".len() as u32);
2860 assert_eq!(point.to_display_point(&map), display_point);
2861 assert_eq!(display_point.to_point(&map), point,);
2862
2863 let point = MultiBufferPoint::new(2, "🏀β\t\t".len() as u32);
2864 let display_point = DisplayPoint::new(DisplayRow(2), "🏀β ".len() as u32);
2865 assert_eq!(point.to_display_point(&map), display_point);
2866 assert_eq!(display_point.to_point(&map), point,);
2867
2868 // Display points inside of expanded tabs
2869 assert_eq!(
2870 DisplayPoint::new(DisplayRow(0), "✅ ".len() as u32).to_point(&map),
2871 MultiBufferPoint::new(0, "✅\t".len() as u32),
2872 );
2873 assert_eq!(
2874 DisplayPoint::new(DisplayRow(0), "✅ ".len() as u32).to_point(&map),
2875 MultiBufferPoint::new(0, "✅".len() as u32),
2876 );
2877
2878 // Clipping display points inside of multi-byte characters
2879 assert_eq!(
2880 map.clip_point(
2881 DisplayPoint::new(DisplayRow(0), "✅".len() as u32 - 1),
2882 Left
2883 ),
2884 DisplayPoint::new(DisplayRow(0), 0)
2885 );
2886 assert_eq!(
2887 map.clip_point(
2888 DisplayPoint::new(DisplayRow(0), "✅".len() as u32 - 1),
2889 Bias::Right
2890 ),
2891 DisplayPoint::new(DisplayRow(0), "✅".len() as u32)
2892 );
2893 }
2894
2895 #[gpui::test]
2896 fn test_max_point(cx: &mut gpui::App) {
2897 init_test(cx, |_| {});
2898
2899 let buffer = MultiBuffer::build_simple("aaa\n\t\tbbb", cx);
2900 let font_size = px(14.0);
2901 let map = cx.new(|cx| {
2902 DisplayMap::new(
2903 buffer.clone(),
2904 font("Helvetica"),
2905 font_size,
2906 None,
2907 1,
2908 1,
2909 FoldPlaceholder::test(),
2910 DiagnosticSeverity::Warning,
2911 cx,
2912 )
2913 });
2914 assert_eq!(
2915 map.update(cx, |map, cx| map.snapshot(cx)).max_point(),
2916 DisplayPoint::new(DisplayRow(1), 11)
2917 )
2918 }
2919
2920 fn syntax_chunks(
2921 rows: Range<DisplayRow>,
2922 map: &Entity<DisplayMap>,
2923 theme: &SyntaxTheme,
2924 cx: &mut App,
2925 ) -> Vec<(String, Option<Hsla>)> {
2926 chunks(rows, map, theme, cx)
2927 .into_iter()
2928 .map(|(text, color, _)| (text, color))
2929 .collect()
2930 }
2931
2932 fn chunks(
2933 rows: Range<DisplayRow>,
2934 map: &Entity<DisplayMap>,
2935 theme: &SyntaxTheme,
2936 cx: &mut App,
2937 ) -> Vec<(String, Option<Hsla>, Option<Hsla>)> {
2938 let snapshot = map.update(cx, |map, cx| map.snapshot(cx));
2939 let mut chunks: Vec<(String, Option<Hsla>, Option<Hsla>)> = Vec::new();
2940 for chunk in snapshot.chunks(rows, true, HighlightStyles::default()) {
2941 let syntax_color = chunk
2942 .syntax_highlight_id
2943 .and_then(|id| id.style(theme)?.color);
2944 let highlight_color = chunk.highlight_style.and_then(|style| style.color);
2945 if let Some((last_chunk, last_syntax_color, last_highlight_color)) = chunks.last_mut()
2946 && syntax_color == *last_syntax_color
2947 && highlight_color == *last_highlight_color
2948 {
2949 last_chunk.push_str(chunk.text);
2950 continue;
2951 }
2952 chunks.push((chunk.text.to_string(), syntax_color, highlight_color));
2953 }
2954 chunks
2955 }
2956
2957 fn init_test(cx: &mut App, f: impl Fn(&mut SettingsContent)) {
2958 let settings = SettingsStore::test(cx);
2959 cx.set_global(settings);
2960 workspace::init_settings(cx);
2961 language::init(cx);
2962 crate::init(cx);
2963 Project::init_settings(cx);
2964 theme::init(LoadThemes::JustBase, cx);
2965 cx.update_global::<SettingsStore, _>(|store, cx| {
2966 store.update_user_settings(cx, f);
2967 });
2968 }
2969}