1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, SelectPhase, SoftWrap, ToPoint,
4 MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 git::{diff_hunk_to_display, DisplayDiffHunk},
9 hover_popover::{
10 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
11 MIN_POPOVER_LINE_HEIGHT,
12 },
13 link_go_to_definition::{
14 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
15 },
16 mouse_context_menu, EditorStyle, GutterHover, UnfoldAt,
17};
18use clock::ReplicaId;
19use collections::{BTreeMap, HashMap};
20use git::diff::DiffHunkStatus;
21use gpui::{
22 color::Color,
23 elements::*,
24 fonts::{HighlightStyle, TextStyle, Underline},
25 geometry::{
26 rect::RectF,
27 vector::{vec2f, Vector2F},
28 PathBuilder,
29 },
30 json::{self, ToJson},
31 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
32 text_layout::{self, Line, RunStyle, TextLayoutCache},
33 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
34 MouseRegion, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
35};
36use itertools::Itertools;
37use json::json;
38use language::{Bias, CursorShape, DiagnosticSeverity, OffsetUtf16, Selection};
39use project::ProjectPath;
40use settings::{GitGutter, Settings, ShowWhitespaces};
41use smallvec::SmallVec;
42use std::{
43 borrow::Cow,
44 cmp::{self, Ordering},
45 fmt::Write,
46 iter,
47 ops::Range,
48 sync::Arc,
49};
50use workspace::item::Item;
51
52enum FoldMarkers {}
53
54struct SelectionLayout {
55 head: DisplayPoint,
56 cursor_shape: CursorShape,
57 range: Range<DisplayPoint>,
58}
59
60impl SelectionLayout {
61 fn new<T: ToPoint + ToDisplayPoint + Clone>(
62 selection: Selection<T>,
63 line_mode: bool,
64 cursor_shape: CursorShape,
65 map: &DisplaySnapshot,
66 ) -> Self {
67 if line_mode {
68 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
69 let point_range = map.expand_to_line(selection.range());
70 Self {
71 head: selection.head().to_display_point(map),
72 cursor_shape,
73 range: point_range.start.to_display_point(map)
74 ..point_range.end.to_display_point(map),
75 }
76 } else {
77 let selection = selection.map(|p| p.to_display_point(map));
78 Self {
79 head: selection.head(),
80 cursor_shape,
81 range: selection.range(),
82 }
83 }
84 }
85}
86
87#[derive(Clone)]
88pub struct EditorElement {
89 style: Arc<EditorStyle>,
90}
91
92impl EditorElement {
93 pub fn new(style: EditorStyle) -> Self {
94 Self {
95 style: Arc::new(style),
96 }
97 }
98
99 fn attach_mouse_handlers(
100 scene: &mut SceneBuilder,
101 position_map: &Arc<PositionMap>,
102 has_popovers: bool,
103 visible_bounds: RectF,
104 text_bounds: RectF,
105 gutter_bounds: RectF,
106 bounds: RectF,
107 cx: &mut ViewContext<Editor>,
108 ) {
109 enum EditorElementMouseHandlers {}
110 scene.push_mouse_region(
111 MouseRegion::new::<EditorElementMouseHandlers>(
112 cx.view_id(),
113 cx.view_id(),
114 visible_bounds,
115 )
116 .on_down(MouseButton::Left, {
117 let position_map = position_map.clone();
118 move |event, editor, cx| {
119 if !Self::mouse_down(
120 editor,
121 event.platform_event,
122 position_map.as_ref(),
123 text_bounds,
124 gutter_bounds,
125 cx,
126 ) {
127 cx.propagate_event();
128 }
129 }
130 })
131 .on_down(MouseButton::Right, {
132 let position_map = position_map.clone();
133 move |event, editor, cx| {
134 if !Self::mouse_right_down(
135 editor,
136 event.position,
137 position_map.as_ref(),
138 text_bounds,
139 cx,
140 ) {
141 cx.propagate_event();
142 }
143 }
144 })
145 .on_up(MouseButton::Left, {
146 let position_map = position_map.clone();
147 move |event, editor, cx| {
148 if !Self::mouse_up(
149 editor,
150 event.position,
151 event.cmd,
152 event.shift,
153 position_map.as_ref(),
154 text_bounds,
155 cx,
156 ) {
157 cx.propagate_event()
158 }
159 }
160 })
161 .on_drag(MouseButton::Left, {
162 let position_map = position_map.clone();
163 move |event, editor, cx| {
164 if !Self::mouse_dragged(
165 editor,
166 event.platform_event,
167 position_map.as_ref(),
168 text_bounds,
169 cx,
170 ) {
171 cx.propagate_event()
172 }
173 }
174 })
175 .on_move({
176 let position_map = position_map.clone();
177 move |event, editor, cx| {
178 if !Self::mouse_moved(
179 editor,
180 event.platform_event,
181 &position_map,
182 text_bounds,
183 cx,
184 ) {
185 cx.propagate_event()
186 }
187 }
188 })
189 .on_move_out(move |_, editor: &mut Editor, cx| {
190 if has_popovers {
191 hide_hover(editor, cx);
192 }
193 })
194 .on_scroll({
195 let position_map = position_map.clone();
196 move |event, editor, cx| {
197 if !Self::scroll(
198 editor,
199 event.position,
200 *event.delta.raw(),
201 event.delta.precise(),
202 &position_map,
203 bounds,
204 cx,
205 ) {
206 cx.propagate_event()
207 }
208 }
209 }),
210 );
211
212 enum GutterHandlers {}
213 scene.push_mouse_region(
214 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
215 .on_hover(|hover, editor: &mut Editor, cx| {
216 editor.gutter_hover(
217 &GutterHover {
218 hovered: hover.started,
219 },
220 cx,
221 );
222 }),
223 )
224 }
225
226 fn mouse_down(
227 editor: &mut Editor,
228 MouseButtonEvent {
229 position,
230 modifiers:
231 Modifiers {
232 shift,
233 ctrl,
234 alt,
235 cmd,
236 ..
237 },
238 mut click_count,
239 ..
240 }: MouseButtonEvent,
241 position_map: &PositionMap,
242 text_bounds: RectF,
243 gutter_bounds: RectF,
244 cx: &mut EventContext<Editor>,
245 ) -> bool {
246 if gutter_bounds.contains_point(position) {
247 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
248 } else if !text_bounds.contains_point(position) {
249 return false;
250 }
251
252 let (position, target_position) = position_map.point_for_position(text_bounds, position);
253
254 if shift && alt {
255 editor.select(
256 SelectPhase::BeginColumnar {
257 position,
258 goal_column: target_position.column(),
259 },
260 cx,
261 );
262 } else if shift && !ctrl && !alt && !cmd {
263 editor.select(
264 SelectPhase::Extend {
265 position,
266 click_count,
267 },
268 cx,
269 );
270 } else {
271 editor.select(
272 SelectPhase::Begin {
273 position,
274 add: alt,
275 click_count,
276 },
277 cx,
278 );
279 }
280
281 true
282 }
283
284 fn mouse_right_down(
285 editor: &mut Editor,
286 position: Vector2F,
287 position_map: &PositionMap,
288 text_bounds: RectF,
289 cx: &mut EventContext<Editor>,
290 ) -> bool {
291 if !text_bounds.contains_point(position) {
292 return false;
293 }
294
295 let (point, _) = position_map.point_for_position(text_bounds, position);
296 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
297 true
298 }
299
300 fn mouse_up(
301 editor: &mut Editor,
302 position: Vector2F,
303 cmd: bool,
304 shift: bool,
305 position_map: &PositionMap,
306 text_bounds: RectF,
307 cx: &mut EventContext<Editor>,
308 ) -> bool {
309 let end_selection = editor.has_pending_selection();
310 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
311
312 if end_selection {
313 editor.select(SelectPhase::End, cx);
314 }
315
316 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
317 let (point, target_point) = position_map.point_for_position(text_bounds, position);
318
319 if point == target_point {
320 if shift {
321 go_to_fetched_type_definition(editor, point, cx);
322 } else {
323 go_to_fetched_definition(editor, point, cx);
324 }
325
326 return true;
327 }
328 }
329
330 end_selection
331 }
332
333 fn mouse_dragged(
334 editor: &mut Editor,
335 MouseMovedEvent {
336 modifiers: Modifiers { cmd, shift, .. },
337 position,
338 ..
339 }: MouseMovedEvent,
340 position_map: &PositionMap,
341 text_bounds: RectF,
342 cx: &mut EventContext<Editor>,
343 ) -> bool {
344 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
345 // Don't trigger hover popover if mouse is hovering over context menu
346 let point = if text_bounds.contains_point(position) {
347 let (point, target_point) = position_map.point_for_position(text_bounds, position);
348 if point == target_point {
349 Some(point)
350 } else {
351 None
352 }
353 } else {
354 None
355 };
356
357 update_go_to_definition_link(editor, point, cmd, shift, cx);
358
359 if editor.has_pending_selection() {
360 let mut scroll_delta = Vector2F::zero();
361
362 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
363 let top = text_bounds.origin_y() + vertical_margin;
364 let bottom = text_bounds.lower_left().y() - vertical_margin;
365 if position.y() < top {
366 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
367 }
368 if position.y() > bottom {
369 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
370 }
371
372 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
373 let left = text_bounds.origin_x() + horizontal_margin;
374 let right = text_bounds.upper_right().x() - horizontal_margin;
375 if position.x() < left {
376 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
377 left - position.x(),
378 ))
379 }
380 if position.x() > right {
381 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
382 position.x() - right,
383 ))
384 }
385
386 let (position, target_position) =
387 position_map.point_for_position(text_bounds, position);
388
389 editor.select(
390 SelectPhase::Update {
391 position,
392 goal_column: target_position.column(),
393 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
394 .clamp(Vector2F::zero(), position_map.scroll_max),
395 },
396 cx,
397 );
398 hover_at(editor, point, cx);
399 true
400 } else {
401 hover_at(editor, point, cx);
402 false
403 }
404 }
405
406 fn mouse_moved(
407 editor: &mut Editor,
408 MouseMovedEvent {
409 modifiers: Modifiers { shift, cmd, .. },
410 position,
411 ..
412 }: MouseMovedEvent,
413 position_map: &PositionMap,
414 text_bounds: RectF,
415 cx: &mut ViewContext<Editor>,
416 ) -> bool {
417 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
418 // Don't trigger hover popover if mouse is hovering over context menu
419 let point = position_to_display_point(position, text_bounds, position_map);
420
421 update_go_to_definition_link(editor, point, cmd, shift, cx);
422 hover_at(editor, point, cx);
423
424 true
425 }
426
427 fn scroll(
428 editor: &mut Editor,
429 position: Vector2F,
430 mut delta: Vector2F,
431 precise: bool,
432 position_map: &PositionMap,
433 bounds: RectF,
434 cx: &mut ViewContext<Editor>,
435 ) -> bool {
436 if !bounds.contains_point(position) {
437 return false;
438 }
439
440 let line_height = position_map.line_height;
441 let max_glyph_width = position_map.em_width;
442
443 let axis = if precise {
444 //Trackpad
445 position_map.snapshot.ongoing_scroll.filter(&mut delta)
446 } else {
447 //Not trackpad
448 delta *= vec2f(max_glyph_width, line_height);
449 None //Resets ongoing scroll
450 };
451
452 let scroll_position = position_map.snapshot.scroll_position();
453 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
454 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
455 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
456 editor.scroll(scroll_position, axis, cx);
457
458 true
459 }
460
461 fn paint_background(
462 &self,
463 scene: &mut SceneBuilder,
464 gutter_bounds: RectF,
465 text_bounds: RectF,
466 layout: &LayoutState,
467 ) {
468 let bounds = gutter_bounds.union_rect(text_bounds);
469 let scroll_top =
470 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
471 scene.push_quad(Quad {
472 bounds: gutter_bounds,
473 background: Some(self.style.gutter_background),
474 border: Border::new(0., Color::transparent_black()),
475 corner_radius: 0.,
476 });
477 scene.push_quad(Quad {
478 bounds: text_bounds,
479 background: Some(self.style.background),
480 border: Border::new(0., Color::transparent_black()),
481 corner_radius: 0.,
482 });
483
484 if let EditorMode::Full = layout.mode {
485 let mut active_rows = layout.active_rows.iter().peekable();
486 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
487 let mut end_row = *start_row;
488 while active_rows.peek().map_or(false, |r| {
489 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
490 }) {
491 active_rows.next().unwrap();
492 end_row += 1;
493 }
494
495 if !contains_non_empty_selection {
496 let origin = vec2f(
497 bounds.origin_x(),
498 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
499 - scroll_top,
500 );
501 let size = vec2f(
502 bounds.width(),
503 layout.position_map.line_height * (end_row - start_row + 1) as f32,
504 );
505 scene.push_quad(Quad {
506 bounds: RectF::new(origin, size),
507 background: Some(self.style.active_line_background),
508 border: Border::default(),
509 corner_radius: 0.,
510 });
511 }
512 }
513
514 if let Some(highlighted_rows) = &layout.highlighted_rows {
515 let origin = vec2f(
516 bounds.origin_x(),
517 bounds.origin_y()
518 + (layout.position_map.line_height * highlighted_rows.start as f32)
519 - scroll_top,
520 );
521 let size = vec2f(
522 bounds.width(),
523 layout.position_map.line_height * highlighted_rows.len() as f32,
524 );
525 scene.push_quad(Quad {
526 bounds: RectF::new(origin, size),
527 background: Some(self.style.highlighted_line_background),
528 border: Border::default(),
529 corner_radius: 0.,
530 });
531 }
532 }
533 }
534
535 fn paint_gutter(
536 &mut self,
537 scene: &mut SceneBuilder,
538 bounds: RectF,
539 visible_bounds: RectF,
540 layout: &mut LayoutState,
541 editor: &mut Editor,
542 cx: &mut ViewContext<Editor>,
543 ) {
544 let line_height = layout.position_map.line_height;
545
546 let scroll_position = layout.position_map.snapshot.scroll_position();
547 let scroll_top = scroll_position.y() * line_height;
548
549 let show_gutter = matches!(
550 &cx.global::<Settings>()
551 .git_overrides
552 .git_gutter
553 .unwrap_or_default(),
554 GitGutter::TrackedFiles
555 );
556
557 if show_gutter {
558 Self::paint_diff_hunks(scene, bounds, layout, cx);
559 }
560
561 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
562 if let Some(line) = line {
563 let line_origin = bounds.origin()
564 + vec2f(
565 bounds.width() - line.width() - layout.gutter_padding,
566 ix as f32 * line_height - (scroll_top % line_height),
567 );
568
569 line.paint(scene, line_origin, visible_bounds, line_height, cx);
570 }
571 }
572
573 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
574 if let Some(indicator) = fold_indicator.as_mut() {
575 let position = vec2f(
576 bounds.width() - layout.gutter_padding,
577 ix as f32 * line_height - (scroll_top % line_height),
578 );
579 let centering_offset = vec2f(
580 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
581 (line_height - indicator.size().y()) / 2.,
582 );
583
584 let indicator_origin = bounds.origin() + position + centering_offset;
585
586 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
587 }
588 }
589
590 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
591 let mut x = 0.;
592 let mut y = *row as f32 * line_height - scroll_top;
593 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
594 y += (line_height - indicator.size().y()) / 2.;
595 indicator.paint(
596 scene,
597 bounds.origin() + vec2f(x, y),
598 visible_bounds,
599 editor,
600 cx,
601 );
602 }
603 }
604
605 fn paint_diff_hunks(
606 scene: &mut SceneBuilder,
607 bounds: RectF,
608 layout: &mut LayoutState,
609 cx: &mut ViewContext<Editor>,
610 ) {
611 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
612 let line_height = layout.position_map.line_height;
613
614 let scroll_position = layout.position_map.snapshot.scroll_position();
615 let scroll_top = scroll_position.y() * line_height;
616
617 for hunk in &layout.display_hunks {
618 let (display_row_range, status) = match hunk {
619 //TODO: This rendering is entirely a horrible hack
620 &DisplayDiffHunk::Folded { display_row: row } => {
621 let start_y = row as f32 * line_height - scroll_top;
622 let end_y = start_y + line_height;
623
624 let width = diff_style.removed_width_em * line_height;
625 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
626 let highlight_size = vec2f(width * 2., end_y - start_y);
627 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
628
629 scene.push_quad(Quad {
630 bounds: highlight_bounds,
631 background: Some(diff_style.modified),
632 border: Border::new(0., Color::transparent_black()),
633 corner_radius: 1. * line_height,
634 });
635
636 continue;
637 }
638
639 DisplayDiffHunk::Unfolded {
640 display_row_range,
641 status,
642 } => (display_row_range, status),
643 };
644
645 let color = match status {
646 DiffHunkStatus::Added => diff_style.inserted,
647 DiffHunkStatus::Modified => diff_style.modified,
648
649 //TODO: This rendering is entirely a horrible hack
650 DiffHunkStatus::Removed => {
651 let row = *display_row_range.start();
652
653 let offset = line_height / 2.;
654 let start_y = row as f32 * line_height - offset - scroll_top;
655 let end_y = start_y + line_height;
656
657 let width = diff_style.removed_width_em * line_height;
658 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
659 let highlight_size = vec2f(width * 2., end_y - start_y);
660 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
661
662 scene.push_quad(Quad {
663 bounds: highlight_bounds,
664 background: Some(diff_style.deleted),
665 border: Border::new(0., Color::transparent_black()),
666 corner_radius: 1. * line_height,
667 });
668
669 continue;
670 }
671 };
672
673 let start_row = *display_row_range.start();
674 let end_row = *display_row_range.end();
675
676 let start_y = start_row as f32 * line_height - scroll_top;
677 let end_y = end_row as f32 * line_height - scroll_top + line_height;
678
679 let width = diff_style.width_em * line_height;
680 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
681 let highlight_size = vec2f(width * 2., end_y - start_y);
682 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
683
684 scene.push_quad(Quad {
685 bounds: highlight_bounds,
686 background: Some(color),
687 border: Border::new(0., Color::transparent_black()),
688 corner_radius: diff_style.corner_radius * line_height,
689 });
690 }
691 }
692
693 fn paint_text(
694 &mut self,
695 scene: &mut SceneBuilder,
696 bounds: RectF,
697 visible_bounds: RectF,
698 layout: &mut LayoutState,
699 editor: &mut Editor,
700 cx: &mut ViewContext<Editor>,
701 ) {
702 let style = &self.style;
703 let local_replica_id = editor.replica_id(cx);
704 let scroll_position = layout.position_map.snapshot.scroll_position();
705 let start_row = layout.visible_display_row_range.start;
706 let scroll_top = scroll_position.y() * layout.position_map.line_height;
707 let max_glyph_width = layout.position_map.em_width;
708 let scroll_left = scroll_position.x() * max_glyph_width;
709 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
710 let line_end_overshoot = 0.15 * layout.position_map.line_height;
711
712 scene.push_layer(Some(bounds));
713
714 scene.push_cursor_region(CursorRegion {
715 bounds,
716 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
717 CursorStyle::PointingHand
718 } else {
719 CursorStyle::IBeam
720 },
721 });
722
723 let fold_corner_radius =
724 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
725 for (id, range, color) in layout.fold_ranges.iter() {
726 self.paint_highlighted_range(
727 scene,
728 range.clone(),
729 *color,
730 fold_corner_radius,
731 fold_corner_radius * 2.,
732 layout,
733 content_origin,
734 scroll_top,
735 scroll_left,
736 bounds,
737 );
738
739 for bound in range_to_bounds(
740 &range,
741 content_origin,
742 scroll_left,
743 scroll_top,
744 &layout.visible_display_row_range,
745 line_end_overshoot,
746 &layout.position_map,
747 ) {
748 scene.push_cursor_region(CursorRegion {
749 bounds: bound,
750 style: CursorStyle::PointingHand,
751 });
752
753 let display_row = range.start.row();
754
755 let buffer_row = DisplayPoint::new(display_row, 0)
756 .to_point(&layout.position_map.snapshot.display_snapshot)
757 .row;
758
759 scene.push_mouse_region(
760 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
761 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
762 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
763 })
764 .with_notify_on_hover(true)
765 .with_notify_on_click(true),
766 )
767 }
768 }
769
770 for (range, color) in &layout.highlighted_ranges {
771 self.paint_highlighted_range(
772 scene,
773 range.clone(),
774 *color,
775 0.,
776 line_end_overshoot,
777 layout,
778 content_origin,
779 scroll_top,
780 scroll_left,
781 bounds,
782 );
783 }
784
785 let mut cursors = SmallVec::<[Cursor; 32]>::new();
786 let corner_radius = 0.15 * layout.position_map.line_height;
787 let mut selection_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
788
789 for (replica_id, selections) in &layout.selections {
790 let selection_style = style.replica_selection_style(*replica_id);
791
792 for selection in selections {
793 if !selection.range.is_empty() {
794 selection_ranges.push(selection.range.clone());
795 }
796 self.paint_highlighted_range(
797 scene,
798 selection.range.clone(),
799 selection_style.selection,
800 corner_radius,
801 corner_radius * 2.,
802 layout,
803 content_origin,
804 scroll_top,
805 scroll_left,
806 bounds,
807 );
808
809 if editor.show_local_cursors(cx) || *replica_id != local_replica_id {
810 let cursor_position = selection.head;
811 if layout
812 .visible_display_row_range
813 .contains(&cursor_position.row())
814 {
815 let cursor_row_layout = &layout.position_map.line_layouts
816 [(cursor_position.row() - start_row) as usize]
817 .line;
818 let cursor_column = cursor_position.column() as usize;
819
820 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
821 let mut block_width =
822 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
823 if block_width == 0.0 {
824 block_width = layout.position_map.em_width;
825 }
826 let block_text = if let CursorShape::Block = selection.cursor_shape {
827 layout
828 .position_map
829 .snapshot
830 .chars_at(cursor_position)
831 .next()
832 .and_then(|(character, _)| {
833 let font_id =
834 cursor_row_layout.font_for_index(cursor_column)?;
835 let text = character.to_string();
836
837 Some(cx.text_layout_cache().layout_str(
838 &text,
839 cursor_row_layout.font_size(),
840 &[(
841 text.len(),
842 RunStyle {
843 font_id,
844 color: style.background,
845 underline: Default::default(),
846 },
847 )],
848 ))
849 })
850 } else {
851 None
852 };
853
854 let x = cursor_character_x - scroll_left;
855 let y = cursor_position.row() as f32 * layout.position_map.line_height
856 - scroll_top;
857 cursors.push(Cursor {
858 color: selection_style.cursor,
859 block_width,
860 origin: vec2f(x, y),
861 line_height: layout.position_map.line_height,
862 shape: selection.cursor_shape,
863 block_text,
864 });
865 }
866 }
867 }
868 }
869
870 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
871 draw_line_glyphs(
872 layout,
873 start_row,
874 scroll_top,
875 scene,
876 content_origin,
877 scroll_left,
878 visible_text_bounds,
879 cx,
880 selection_ranges,
881 visible_bounds,
882 );
883 }
884
885 scene.paint_layer(Some(bounds), |scene| {
886 for cursor in cursors {
887 cursor.paint(scene, content_origin, cx);
888 }
889 });
890
891 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
892 scene.push_stacking_context(None, None);
893 let cursor_row_layout =
894 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
895 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
896 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
897 let mut list_origin = content_origin + vec2f(x, y);
898 let list_width = context_menu.size().x();
899 let list_height = context_menu.size().y();
900
901 // Snap the right edge of the list to the right edge of the window if
902 // its horizontal bounds overflow.
903 if list_origin.x() + list_width > cx.window_size().x() {
904 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
905 }
906
907 if list_origin.y() + list_height > bounds.max_y() {
908 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
909 }
910
911 context_menu.paint(
912 scene,
913 list_origin,
914 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
915 editor,
916 cx,
917 );
918
919 scene.pop_stacking_context();
920 }
921
922 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
923 scene.push_stacking_context(None, None);
924
925 // This is safe because we check on layout whether the required row is available
926 let hovered_row_layout =
927 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
928
929 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
930 // height. This is the size we will use to decide whether to render popovers above or below
931 // the hovered line.
932 let first_size = hover_popovers[0].size();
933 let height_to_reserve = first_size.y()
934 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
935
936 // Compute Hovered Point
937 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
938 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
939 let hovered_point = content_origin + vec2f(x, y);
940
941 if hovered_point.y() - height_to_reserve > 0.0 {
942 // There is enough space above. Render popovers above the hovered point
943 let mut current_y = hovered_point.y();
944 for hover_popover in hover_popovers {
945 let size = hover_popover.size();
946 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
947
948 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
949 if x_out_of_bounds < 0.0 {
950 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
951 }
952
953 hover_popover.paint(
954 scene,
955 popover_origin,
956 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
957 editor,
958 cx,
959 );
960
961 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
962 }
963 } else {
964 // There is not enough space above. Render popovers below the hovered point
965 let mut current_y = hovered_point.y() + layout.position_map.line_height;
966 for hover_popover in hover_popovers {
967 let size = hover_popover.size();
968 let mut popover_origin = vec2f(hovered_point.x(), current_y);
969
970 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
971 if x_out_of_bounds < 0.0 {
972 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
973 }
974
975 hover_popover.paint(
976 scene,
977 popover_origin,
978 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
979 editor,
980 cx,
981 );
982
983 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
984 }
985 }
986
987 scene.pop_stacking_context();
988 }
989
990 scene.pop_layer();
991 }
992
993 fn paint_scrollbar(
994 &mut self,
995 scene: &mut SceneBuilder,
996 bounds: RectF,
997 layout: &mut LayoutState,
998 cx: &mut ViewContext<Editor>,
999 ) {
1000 enum ScrollbarMouseHandlers {}
1001 if layout.mode != EditorMode::Full {
1002 return;
1003 }
1004
1005 let style = &self.style.theme.scrollbar;
1006
1007 let top = bounds.min_y();
1008 let bottom = bounds.max_y();
1009 let right = bounds.max_x();
1010 let left = right - style.width;
1011 let row_range = &layout.scrollbar_row_range;
1012 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1013
1014 let mut height = bounds.height();
1015 let mut first_row_y_offset = 0.0;
1016
1017 // Impose a minimum height on the scrollbar thumb
1018 let min_thumb_height =
1019 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1020 let thumb_height = (row_range.end - row_range.start) * height / max_row;
1021 if thumb_height < min_thumb_height {
1022 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1023 height -= min_thumb_height - thumb_height;
1024 }
1025
1026 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1027
1028 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1029 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1030 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1031 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1032
1033 if layout.show_scrollbars {
1034 scene.push_quad(Quad {
1035 bounds: track_bounds,
1036 border: style.track.border,
1037 background: style.track.background_color,
1038 ..Default::default()
1039 });
1040 scene.push_quad(Quad {
1041 bounds: thumb_bounds,
1042 border: style.thumb.border,
1043 background: style.thumb.background_color,
1044 corner_radius: style.thumb.corner_radius,
1045 });
1046 }
1047
1048 scene.push_cursor_region(CursorRegion {
1049 bounds: track_bounds,
1050 style: CursorStyle::Arrow,
1051 });
1052 scene.push_mouse_region(
1053 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1054 .on_move(move |_, editor: &mut Editor, cx| {
1055 editor.scroll_manager.show_scrollbar(cx);
1056 })
1057 .on_down(MouseButton::Left, {
1058 let row_range = row_range.clone();
1059 move |event, editor: &mut Editor, cx| {
1060 let y = event.position.y();
1061 if y < thumb_top || thumb_bottom < y {
1062 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1063 let top_row = center_row
1064 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1065 let mut position = editor.scroll_position(cx);
1066 position.set_y(top_row as f32);
1067 editor.set_scroll_position(position, cx);
1068 } else {
1069 editor.scroll_manager.show_scrollbar(cx);
1070 }
1071 }
1072 })
1073 .on_drag(MouseButton::Left, {
1074 move |event, editor: &mut Editor, cx| {
1075 let y = event.prev_mouse_position.y();
1076 let new_y = event.position.y();
1077 if thumb_top < y && y < thumb_bottom {
1078 let mut position = editor.scroll_position(cx);
1079 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1080 if position.y() < 0.0 {
1081 position.set_y(0.);
1082 }
1083 editor.set_scroll_position(position, cx);
1084 }
1085 }
1086 }),
1087 );
1088 }
1089
1090 #[allow(clippy::too_many_arguments)]
1091 fn paint_highlighted_range(
1092 &self,
1093 scene: &mut SceneBuilder,
1094 range: Range<DisplayPoint>,
1095 color: Color,
1096 corner_radius: f32,
1097 line_end_overshoot: f32,
1098 layout: &LayoutState,
1099 content_origin: Vector2F,
1100 scroll_top: f32,
1101 scroll_left: f32,
1102 bounds: RectF,
1103 ) {
1104 let start_row = layout.visible_display_row_range.start;
1105 let end_row = layout.visible_display_row_range.end;
1106 if range.start != range.end {
1107 let row_range = if range.end.column() == 0 {
1108 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1109 } else {
1110 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1111 };
1112
1113 let highlighted_range = HighlightedRange {
1114 color,
1115 line_height: layout.position_map.line_height,
1116 corner_radius,
1117 start_y: content_origin.y()
1118 + row_range.start as f32 * layout.position_map.line_height
1119 - scroll_top,
1120 lines: row_range
1121 .into_iter()
1122 .map(|row| {
1123 let line_layout =
1124 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1125 HighlightedRangeLine {
1126 start_x: if row == range.start.row() {
1127 content_origin.x()
1128 + line_layout.x_for_index(range.start.column() as usize)
1129 - scroll_left
1130 } else {
1131 content_origin.x() - scroll_left
1132 },
1133 end_x: if row == range.end.row() {
1134 content_origin.x()
1135 + line_layout.x_for_index(range.end.column() as usize)
1136 - scroll_left
1137 } else {
1138 content_origin.x() + line_layout.width() + line_end_overshoot
1139 - scroll_left
1140 },
1141 }
1142 })
1143 .collect(),
1144 };
1145
1146 highlighted_range.paint(bounds, scene);
1147 }
1148 }
1149
1150 fn paint_blocks(
1151 &mut self,
1152 scene: &mut SceneBuilder,
1153 bounds: RectF,
1154 visible_bounds: RectF,
1155 layout: &mut LayoutState,
1156 editor: &mut Editor,
1157 cx: &mut ViewContext<Editor>,
1158 ) {
1159 let scroll_position = layout.position_map.snapshot.scroll_position();
1160 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1161 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1162
1163 for block in &mut layout.blocks {
1164 let mut origin = bounds.origin()
1165 + vec2f(
1166 0.,
1167 block.row as f32 * layout.position_map.line_height - scroll_top,
1168 );
1169 if !matches!(block.style, BlockStyle::Sticky) {
1170 origin += vec2f(-scroll_left, 0.);
1171 }
1172 block
1173 .element
1174 .paint(scene, origin, visible_bounds, editor, cx);
1175 }
1176 }
1177
1178 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1179 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1180 let style = &self.style;
1181
1182 cx.text_layout_cache()
1183 .layout_str(
1184 "1".repeat(digit_count).as_str(),
1185 style.text.font_size,
1186 &[(
1187 digit_count,
1188 RunStyle {
1189 font_id: style.text.font_id,
1190 color: Color::black(),
1191 underline: Default::default(),
1192 },
1193 )],
1194 )
1195 .width()
1196 }
1197
1198 //Folds contained in a hunk are ignored apart from shrinking visual size
1199 //If a fold contains any hunks then that fold line is marked as modified
1200 fn layout_git_gutters(
1201 &self,
1202 display_rows: Range<u32>,
1203 snapshot: &EditorSnapshot,
1204 ) -> Vec<DisplayDiffHunk> {
1205 let buffer_snapshot = &snapshot.buffer_snapshot;
1206
1207 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1208 .to_point(snapshot)
1209 .row;
1210 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1211 .to_point(snapshot)
1212 .row;
1213
1214 buffer_snapshot
1215 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1216 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1217 .dedup()
1218 .collect()
1219 }
1220
1221 fn layout_line_numbers(
1222 &self,
1223 rows: Range<u32>,
1224 active_rows: &BTreeMap<u32, bool>,
1225 is_singleton: bool,
1226 snapshot: &EditorSnapshot,
1227 cx: &ViewContext<Editor>,
1228 ) -> (
1229 Vec<Option<text_layout::Line>>,
1230 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1231 ) {
1232 let style = &self.style;
1233 let include_line_numbers = snapshot.mode == EditorMode::Full;
1234 let mut line_number_layouts = Vec::with_capacity(rows.len());
1235 let mut fold_statuses = Vec::with_capacity(rows.len());
1236 let mut line_number = String::new();
1237 for (ix, row) in snapshot
1238 .buffer_rows(rows.start)
1239 .take((rows.end - rows.start) as usize)
1240 .enumerate()
1241 {
1242 let display_row = rows.start + ix as u32;
1243 let (active, color) = if active_rows.contains_key(&display_row) {
1244 (true, style.line_number_active)
1245 } else {
1246 (false, style.line_number)
1247 };
1248 if let Some(buffer_row) = row {
1249 if include_line_numbers {
1250 line_number.clear();
1251 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1252 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1253 &line_number,
1254 style.text.font_size,
1255 &[(
1256 line_number.len(),
1257 RunStyle {
1258 font_id: style.text.font_id,
1259 color,
1260 underline: Default::default(),
1261 },
1262 )],
1263 )));
1264 fold_statuses.push(
1265 is_singleton
1266 .then(|| {
1267 snapshot
1268 .fold_for_line(buffer_row)
1269 .map(|fold_status| (fold_status, buffer_row, active))
1270 })
1271 .flatten(),
1272 )
1273 }
1274 } else {
1275 fold_statuses.push(None);
1276 line_number_layouts.push(None);
1277 }
1278 }
1279
1280 (line_number_layouts, fold_statuses)
1281 }
1282
1283 fn layout_lines(
1284 &mut self,
1285 rows: Range<u32>,
1286 line_number_layouts: &[Option<Line>],
1287 snapshot: &EditorSnapshot,
1288 cx: &ViewContext<Editor>,
1289 ) -> Vec<LineWithInvisibles> {
1290 if rows.start >= rows.end {
1291 return Vec::new();
1292 }
1293
1294 // When the editor is empty and unfocused, then show the placeholder.
1295 if snapshot.is_empty() {
1296 let placeholder_style = self
1297 .style
1298 .placeholder_text
1299 .as_ref()
1300 .unwrap_or(&self.style.text);
1301 let placeholder_text = snapshot.placeholder_text();
1302 let placeholder_lines = placeholder_text
1303 .as_ref()
1304 .map_or("", AsRef::as_ref)
1305 .split('\n')
1306 .skip(rows.start as usize)
1307 .chain(iter::repeat(""))
1308 .take(rows.len());
1309 placeholder_lines
1310 .map(|line| {
1311 cx.text_layout_cache().layout_str(
1312 line,
1313 placeholder_style.font_size,
1314 &[(
1315 line.len(),
1316 RunStyle {
1317 font_id: placeholder_style.font_id,
1318 color: placeholder_style.color,
1319 underline: Default::default(),
1320 },
1321 )],
1322 )
1323 })
1324 .map(|line| LineWithInvisibles {
1325 line,
1326 invisibles: Vec::new(),
1327 })
1328 .collect()
1329 } else {
1330 let style = &self.style;
1331 let chunks = snapshot
1332 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1333 .map(|chunk| {
1334 let mut highlight_style = chunk
1335 .syntax_highlight_id
1336 .and_then(|id| id.style(&style.syntax));
1337
1338 if let Some(chunk_highlight) = chunk.highlight_style {
1339 if let Some(highlight_style) = highlight_style.as_mut() {
1340 highlight_style.highlight(chunk_highlight);
1341 } else {
1342 highlight_style = Some(chunk_highlight);
1343 }
1344 }
1345
1346 let mut diagnostic_highlight = HighlightStyle::default();
1347
1348 if chunk.is_unnecessary {
1349 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1350 }
1351
1352 if let Some(severity) = chunk.diagnostic_severity {
1353 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1354 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1355 let diagnostic_style = super::diagnostic_style(severity, true, style);
1356 diagnostic_highlight.underline = Some(Underline {
1357 color: Some(diagnostic_style.message.text.color),
1358 thickness: 1.0.into(),
1359 squiggly: true,
1360 });
1361 }
1362 }
1363
1364 if let Some(highlight_style) = highlight_style.as_mut() {
1365 highlight_style.highlight(diagnostic_highlight);
1366 } else {
1367 highlight_style = Some(diagnostic_highlight);
1368 }
1369
1370 HighlightedChunk {
1371 chunk: chunk.text,
1372 style: highlight_style,
1373 is_tab: chunk.is_tab,
1374 }
1375 });
1376
1377 layout_highlighted_chunks(
1378 chunks,
1379 &style.text,
1380 cx.text_layout_cache(),
1381 cx.font_cache(),
1382 MAX_LINE_LEN,
1383 rows.len() as usize,
1384 line_number_layouts,
1385 snapshot.mode,
1386 )
1387 }
1388 }
1389
1390 #[allow(clippy::too_many_arguments)]
1391 fn layout_blocks(
1392 &mut self,
1393 rows: Range<u32>,
1394 snapshot: &EditorSnapshot,
1395 editor_width: f32,
1396 scroll_width: f32,
1397 gutter_padding: f32,
1398 gutter_width: f32,
1399 em_width: f32,
1400 text_x: f32,
1401 line_height: f32,
1402 style: &EditorStyle,
1403 line_layouts: &[LineWithInvisibles],
1404 include_root: bool,
1405 editor: &mut Editor,
1406 cx: &mut LayoutContext<Editor>,
1407 ) -> (f32, Vec<BlockLayout>) {
1408 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1409 let scroll_x = snapshot.scroll_anchor.offset.x();
1410 let (fixed_blocks, non_fixed_blocks) = snapshot
1411 .blocks_in_range(rows.clone())
1412 .partition::<Vec<_>, _>(|(_, block)| match block {
1413 TransformBlock::ExcerptHeader { .. } => false,
1414 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1415 });
1416 let mut render_block = |block: &TransformBlock, width: f32| {
1417 let mut element = match block {
1418 TransformBlock::Custom(block) => {
1419 let align_to = block
1420 .position()
1421 .to_point(&snapshot.buffer_snapshot)
1422 .to_display_point(snapshot);
1423 let anchor_x = text_x
1424 + if rows.contains(&align_to.row()) {
1425 line_layouts[(align_to.row() - rows.start) as usize]
1426 .line
1427 .x_for_index(align_to.column() as usize)
1428 } else {
1429 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1430 .x_for_index(align_to.column() as usize)
1431 };
1432
1433 block.render(&mut BlockContext {
1434 view_context: cx,
1435 anchor_x,
1436 gutter_padding,
1437 line_height,
1438 scroll_x,
1439 gutter_width,
1440 em_width,
1441 })
1442 }
1443 TransformBlock::ExcerptHeader {
1444 id,
1445 buffer,
1446 range,
1447 starts_new_buffer,
1448 ..
1449 } => {
1450 let id = *id;
1451 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1452 let jump_path = ProjectPath {
1453 worktree_id: file.worktree_id(cx),
1454 path: file.path.clone(),
1455 };
1456 let jump_anchor = range
1457 .primary
1458 .as_ref()
1459 .map_or(range.context.start, |primary| primary.start);
1460 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1461
1462 enum JumpIcon {}
1463 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
1464 let style = style.jump_icon.style_for(state, false);
1465 Svg::new("icons/arrow_up_right_8.svg")
1466 .with_color(style.color)
1467 .constrained()
1468 .with_width(style.icon_width)
1469 .aligned()
1470 .contained()
1471 .with_style(style.container)
1472 .constrained()
1473 .with_width(style.button_width)
1474 .with_height(style.button_width)
1475 })
1476 .with_cursor_style(CursorStyle::PointingHand)
1477 .on_click(MouseButton::Left, move |_, editor, cx| {
1478 if let Some(workspace) = editor
1479 .workspace
1480 .as_ref()
1481 .and_then(|(workspace, _)| workspace.upgrade(cx))
1482 {
1483 workspace.update(cx, |workspace, cx| {
1484 Editor::jump(
1485 workspace,
1486 jump_path.clone(),
1487 jump_position,
1488 jump_anchor,
1489 cx,
1490 );
1491 });
1492 }
1493 })
1494 .with_tooltip::<JumpIcon>(
1495 id.into(),
1496 "Jump to Buffer".to_string(),
1497 Some(Box::new(crate::OpenExcerpts)),
1498 tooltip_style.clone(),
1499 cx,
1500 )
1501 .aligned()
1502 .flex_float()
1503 });
1504
1505 if *starts_new_buffer {
1506 let style = &self.style.diagnostic_path_header;
1507 let font_size =
1508 (style.text_scale_factor * self.style.text.font_size).round();
1509
1510 let path = buffer.resolve_file_path(cx, include_root);
1511 let mut filename = None;
1512 let mut parent_path = None;
1513 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1514 if let Some(path) = path {
1515 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1516 parent_path =
1517 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1518 }
1519
1520 Flex::row()
1521 .with_child(
1522 Label::new(
1523 filename.unwrap_or_else(|| "untitled".to_string()),
1524 style.filename.text.clone().with_font_size(font_size),
1525 )
1526 .contained()
1527 .with_style(style.filename.container)
1528 .aligned(),
1529 )
1530 .with_children(parent_path.map(|path| {
1531 Label::new(path, style.path.text.clone().with_font_size(font_size))
1532 .contained()
1533 .with_style(style.path.container)
1534 .aligned()
1535 }))
1536 .with_children(jump_icon)
1537 .contained()
1538 .with_style(style.container)
1539 .with_padding_left(gutter_padding)
1540 .with_padding_right(gutter_padding)
1541 .expanded()
1542 .into_any_named("path header block")
1543 } else {
1544 let text_style = self.style.text.clone();
1545 Flex::row()
1546 .with_child(Label::new("⋯", text_style))
1547 .with_children(jump_icon)
1548 .contained()
1549 .with_padding_left(gutter_padding)
1550 .with_padding_right(gutter_padding)
1551 .expanded()
1552 .into_any_named("collapsed context")
1553 }
1554 }
1555 };
1556
1557 element.layout(
1558 SizeConstraint {
1559 min: Vector2F::zero(),
1560 max: vec2f(width, block.height() as f32 * line_height),
1561 },
1562 editor,
1563 cx,
1564 );
1565 element
1566 };
1567
1568 let mut fixed_block_max_width = 0f32;
1569 let mut blocks = Vec::new();
1570 for (row, block) in fixed_blocks {
1571 let element = render_block(block, f32::INFINITY);
1572 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1573 blocks.push(BlockLayout {
1574 row,
1575 element,
1576 style: BlockStyle::Fixed,
1577 });
1578 }
1579 for (row, block) in non_fixed_blocks {
1580 let style = match block {
1581 TransformBlock::Custom(block) => block.style(),
1582 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1583 };
1584 let width = match style {
1585 BlockStyle::Sticky => editor_width,
1586 BlockStyle::Flex => editor_width
1587 .max(fixed_block_max_width)
1588 .max(gutter_width + scroll_width),
1589 BlockStyle::Fixed => unreachable!(),
1590 };
1591 let element = render_block(block, width);
1592 blocks.push(BlockLayout {
1593 row,
1594 element,
1595 style,
1596 });
1597 }
1598 (
1599 scroll_width.max(fixed_block_max_width - gutter_width),
1600 blocks,
1601 )
1602 }
1603}
1604
1605fn draw_line_glyphs(
1606 layout: &mut LayoutState,
1607 start_row: u32,
1608 scroll_top: f32,
1609 scene: &mut SceneBuilder,
1610 content_origin: Vector2F,
1611 scroll_left: f32,
1612 visible_text_bounds: RectF,
1613 cx: &mut ViewContext<Editor>,
1614 selection_ranges: SmallVec<[Range<DisplayPoint>; 32]>,
1615 visible_bounds: RectF,
1616) {
1617 let line_height = layout.position_map.line_height;
1618
1619 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
1620 let row = start_row + ix as u32;
1621 let line_y = row as f32 * line_height - scroll_top;
1622
1623 line_with_invisibles.line.paint(
1624 scene,
1625 content_origin + vec2f(-scroll_left, line_y),
1626 visible_text_bounds,
1627 line_height,
1628 cx,
1629 );
1630
1631 draw_invisibles(
1632 cx,
1633 &selection_ranges,
1634 line_with_invisibles,
1635 layout,
1636 content_origin,
1637 scroll_left,
1638 line_y,
1639 row,
1640 scene,
1641 visible_bounds,
1642 line_height,
1643 );
1644 }
1645}
1646
1647fn draw_invisibles(
1648 cx: &mut ViewContext<Editor>,
1649 selection_ranges: &SmallVec<[Range<DisplayPoint>; 32]>,
1650 line_with_invisibles: &LineWithInvisibles,
1651 layout: &LayoutState,
1652 content_origin: Vector2F,
1653 scroll_left: f32,
1654 line_y: f32,
1655 row: u32,
1656 scene: &mut SceneBuilder,
1657 visible_bounds: RectF,
1658 line_height: f32,
1659) {
1660 let settings = cx.global::<Settings>();
1661 let regions_to_hit = match settings
1662 .editor_overrides
1663 .show_whitespaces
1664 .or(settings.editor_defaults.show_whitespaces)
1665 .unwrap_or_default()
1666 {
1667 ShowWhitespaces::None => return,
1668 ShowWhitespaces::Selection => Some(selection_ranges),
1669 ShowWhitespaces::All => None,
1670 };
1671
1672 for invisible in &line_with_invisibles.invisibles {
1673 let (&token_offset, invisible_symbol) = match invisible {
1674 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1675 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1676 };
1677
1678 let x_offset = line_with_invisibles.line.x_for_index(token_offset);
1679 let invisible_offset =
1680 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1681 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1682
1683 if let Some(regions_to_hit) = regions_to_hit {
1684 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1685 if !regions_to_hit
1686 .iter()
1687 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1688 {
1689 continue;
1690 }
1691 }
1692 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1693 }
1694}
1695
1696struct HighlightedChunk<'a> {
1697 chunk: &'a str,
1698 style: Option<HighlightStyle>,
1699 is_tab: bool,
1700}
1701
1702#[derive(Debug)]
1703pub struct LineWithInvisibles {
1704 pub line: Line,
1705 invisibles: Vec<Invisible>,
1706}
1707
1708#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1709enum Invisible {
1710 Tab { line_start_offset: usize },
1711 Whitespace { line_offset: usize },
1712}
1713
1714impl Invisible {
1715 #[cfg(test)]
1716 fn offset(&self) -> usize {
1717 *match self {
1718 Self::Tab { line_start_offset } => line_start_offset,
1719 Self::Whitespace { line_offset } => line_offset,
1720 }
1721 }
1722}
1723
1724fn layout_highlighted_chunks<'a>(
1725 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1726 text_style: &TextStyle,
1727 text_layout_cache: &TextLayoutCache,
1728 font_cache: &Arc<FontCache>,
1729 max_line_len: usize,
1730 max_line_count: usize,
1731 line_number_layouts: &[Option<Line>],
1732 editor_mode: EditorMode,
1733) -> Vec<LineWithInvisibles> {
1734 let mut layouts = Vec::with_capacity(max_line_count);
1735 let mut line = String::new();
1736 let mut invisibles = Vec::new();
1737 let mut styles = Vec::new();
1738 let mut non_whitespace_added = false;
1739 let mut row = 0;
1740 let mut line_exceeded_max_len = false;
1741 for highlighted_chunk in chunks.chain([HighlightedChunk {
1742 chunk: "\n",
1743 style: None,
1744 is_tab: false,
1745 }]) {
1746 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1747 if ix > 0 {
1748 layouts.push(LineWithInvisibles {
1749 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1750 invisibles: invisibles.drain(..).collect(),
1751 });
1752
1753 line.clear();
1754 styles.clear();
1755 row += 1;
1756 line_exceeded_max_len = false;
1757 non_whitespace_added = false;
1758 if row == max_line_count {
1759 return layouts;
1760 }
1761 }
1762
1763 if !line_chunk.is_empty() && !line_exceeded_max_len {
1764 let text_style = if let Some(style) = highlighted_chunk.style {
1765 text_style
1766 .clone()
1767 .highlight(style, font_cache)
1768 .map(Cow::Owned)
1769 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1770 } else {
1771 Cow::Borrowed(text_style)
1772 };
1773
1774 if line.len() + line_chunk.len() > max_line_len {
1775 let mut chunk_len = max_line_len - line.len();
1776 while !line_chunk.is_char_boundary(chunk_len) {
1777 chunk_len -= 1;
1778 }
1779 line_chunk = &line_chunk[..chunk_len];
1780 line_exceeded_max_len = true;
1781 }
1782
1783 styles.push((
1784 line_chunk.len(),
1785 RunStyle {
1786 font_id: text_style.font_id,
1787 color: text_style.color,
1788 underline: text_style.underline,
1789 },
1790 ));
1791
1792 if editor_mode == EditorMode::Full {
1793 // Line wrap pads its contents with fake whitespaces,
1794 // avoid printing them
1795 let inside_wrapped_string = line_number_layouts
1796 .get(row)
1797 .and_then(|layout| layout.as_ref())
1798 .is_none();
1799 if highlighted_chunk.is_tab {
1800 if non_whitespace_added || !inside_wrapped_string {
1801 invisibles.push(Invisible::Tab {
1802 line_start_offset: line.len(),
1803 });
1804 }
1805 } else {
1806 invisibles.extend(
1807 line_chunk
1808 .chars()
1809 .enumerate()
1810 .filter(|(_, line_char)| {
1811 let is_whitespace = line_char.is_whitespace();
1812 non_whitespace_added |= !is_whitespace;
1813 is_whitespace
1814 && (non_whitespace_added || !inside_wrapped_string)
1815 })
1816 .map(|(whitespace_index, _)| Invisible::Whitespace {
1817 line_offset: line.len() + whitespace_index,
1818 }),
1819 )
1820 }
1821 }
1822
1823 line.push_str(line_chunk);
1824 }
1825 }
1826 }
1827
1828 layouts
1829}
1830
1831impl Element<Editor> for EditorElement {
1832 type LayoutState = LayoutState;
1833 type PaintState = ();
1834
1835 fn layout(
1836 &mut self,
1837 constraint: SizeConstraint,
1838 editor: &mut Editor,
1839 cx: &mut LayoutContext<Editor>,
1840 ) -> (Vector2F, Self::LayoutState) {
1841 let mut size = constraint.max;
1842 if size.x().is_infinite() {
1843 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1844 }
1845
1846 let snapshot = editor.snapshot(cx);
1847 let style = self.style.clone();
1848 let line_height = style.text.line_height(cx.font_cache());
1849
1850 let gutter_padding;
1851 let gutter_width;
1852 let gutter_margin;
1853 if snapshot.mode == EditorMode::Full {
1854 let em_width = style.text.em_width(cx.font_cache());
1855 gutter_padding = (em_width * style.gutter_padding_factor).round();
1856 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1857 gutter_margin = -style.text.descent(cx.font_cache());
1858 } else {
1859 gutter_padding = 0.0;
1860 gutter_width = 0.0;
1861 gutter_margin = 0.0;
1862 };
1863
1864 let text_width = size.x() - gutter_width;
1865 let em_width = style.text.em_width(cx.font_cache());
1866 let em_advance = style.text.em_advance(cx.font_cache());
1867 let overscroll = vec2f(em_width, 0.);
1868 let snapshot = {
1869 editor.set_visible_line_count(size.y() / line_height);
1870
1871 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1872 let wrap_width = match editor.soft_wrap_mode(cx) {
1873 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1874 SoftWrap::EditorWidth => editor_width,
1875 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1876 };
1877
1878 if editor.set_wrap_width(Some(wrap_width), cx) {
1879 editor.snapshot(cx)
1880 } else {
1881 snapshot
1882 }
1883 };
1884
1885 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1886 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1887 size.set_y(
1888 scroll_height
1889 .min(constraint.max_along(Axis::Vertical))
1890 .max(constraint.min_along(Axis::Vertical))
1891 .min(line_height * max_lines as f32),
1892 )
1893 } else if let EditorMode::SingleLine = snapshot.mode {
1894 size.set_y(
1895 line_height
1896 .min(constraint.max_along(Axis::Vertical))
1897 .max(constraint.min_along(Axis::Vertical)),
1898 )
1899 } else if size.y().is_infinite() {
1900 size.set_y(scroll_height);
1901 }
1902 let gutter_size = vec2f(gutter_width, size.y());
1903 let text_size = vec2f(text_width, size.y());
1904
1905 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1906 let mut snapshot = editor.snapshot(cx);
1907
1908 let scroll_position = snapshot.scroll_position();
1909 // The scroll position is a fractional point, the whole number of which represents
1910 // the top of the window in terms of display rows.
1911 let start_row = scroll_position.y() as u32;
1912 let height_in_lines = size.y() / line_height;
1913 let max_row = snapshot.max_point().row();
1914
1915 // Add 1 to ensure selections bleed off screen
1916 let end_row = 1 + cmp::min(
1917 (scroll_position.y() + height_in_lines).ceil() as u32,
1918 max_row,
1919 );
1920
1921 let start_anchor = if start_row == 0 {
1922 Anchor::min()
1923 } else {
1924 snapshot
1925 .buffer_snapshot
1926 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1927 };
1928 let end_anchor = if end_row > max_row {
1929 Anchor::max()
1930 } else {
1931 snapshot
1932 .buffer_snapshot
1933 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1934 };
1935
1936 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1937 let mut active_rows = BTreeMap::new();
1938 let mut fold_ranges = Vec::new();
1939 let is_singleton = editor.is_singleton(cx);
1940
1941 let highlighted_rows = editor.highlighted_rows();
1942 let theme = cx.global::<Settings>().theme.as_ref();
1943 let highlighted_ranges = editor.background_highlights_in_range(
1944 start_anchor..end_anchor,
1945 &snapshot.display_snapshot,
1946 theme,
1947 );
1948
1949 fold_ranges.extend(
1950 snapshot
1951 .folds_in_range(start_anchor..end_anchor)
1952 .map(|anchor| {
1953 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1954 (
1955 start.row,
1956 start.to_display_point(&snapshot.display_snapshot)
1957 ..anchor.end.to_display_point(&snapshot),
1958 )
1959 }),
1960 );
1961
1962 let mut remote_selections = HashMap::default();
1963 for (replica_id, line_mode, cursor_shape, selection) in snapshot
1964 .buffer_snapshot
1965 .remote_selections_in_range(&(start_anchor..end_anchor))
1966 {
1967 // The local selections match the leader's selections.
1968 if Some(replica_id) == editor.leader_replica_id {
1969 continue;
1970 }
1971 remote_selections
1972 .entry(replica_id)
1973 .or_insert(Vec::new())
1974 .push(SelectionLayout::new(
1975 selection,
1976 line_mode,
1977 cursor_shape,
1978 &snapshot.display_snapshot,
1979 ));
1980 }
1981 selections.extend(remote_selections);
1982
1983 if editor.show_local_selections {
1984 let mut local_selections = editor
1985 .selections
1986 .disjoint_in_range(start_anchor..end_anchor, cx);
1987 local_selections.extend(editor.selections.pending(cx));
1988 for selection in &local_selections {
1989 let is_empty = selection.start == selection.end;
1990 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1991 let selection_end = snapshot.next_line_boundary(selection.end).1;
1992 for row in cmp::max(selection_start.row(), start_row)
1993 ..=cmp::min(selection_end.row(), end_row)
1994 {
1995 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1996 *contains_non_empty_selection |= !is_empty;
1997 }
1998 }
1999
2000 // Render the local selections in the leader's color when following.
2001 let local_replica_id = editor
2002 .leader_replica_id
2003 .unwrap_or_else(|| editor.replica_id(cx));
2004
2005 selections.push((
2006 local_replica_id,
2007 local_selections
2008 .into_iter()
2009 .map(|selection| {
2010 SelectionLayout::new(
2011 selection,
2012 editor.selections.line_mode,
2013 editor.cursor_shape,
2014 &snapshot.display_snapshot,
2015 )
2016 })
2017 .collect(),
2018 ));
2019 }
2020
2021 let show_scrollbars = editor.scroll_manager.scrollbars_visible();
2022 let include_root = editor
2023 .project
2024 .as_ref()
2025 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2026 .unwrap_or_default();
2027
2028 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2029 .into_iter()
2030 .map(|(id, fold)| {
2031 let color = self
2032 .style
2033 .folds
2034 .ellipses
2035 .background
2036 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
2037 .color;
2038
2039 (id, fold, color)
2040 })
2041 .collect();
2042
2043 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2044 start_row..end_row,
2045 &active_rows,
2046 is_singleton,
2047 &snapshot,
2048 cx,
2049 );
2050
2051 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2052
2053 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2054
2055 let mut max_visible_line_width = 0.0;
2056 let line_layouts =
2057 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2058 for line_with_invisibles in &line_layouts {
2059 if line_with_invisibles.line.width() > max_visible_line_width {
2060 max_visible_line_width = line_with_invisibles.line.width();
2061 }
2062 }
2063
2064 let style = self.style.clone();
2065 let longest_line_width = layout_line(
2066 snapshot.longest_row(),
2067 &snapshot,
2068 &style,
2069 cx.text_layout_cache(),
2070 )
2071 .width();
2072 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2073 let em_width = style.text.em_width(cx.font_cache());
2074 let (scroll_width, blocks) = self.layout_blocks(
2075 start_row..end_row,
2076 &snapshot,
2077 size.x(),
2078 scroll_width,
2079 gutter_padding,
2080 gutter_width,
2081 em_width,
2082 gutter_width + gutter_margin,
2083 line_height,
2084 &style,
2085 &line_layouts,
2086 include_root,
2087 editor,
2088 cx,
2089 );
2090
2091 let scroll_max = vec2f(
2092 ((scroll_width - text_size.x()) / em_width).max(0.0),
2093 max_row as f32,
2094 );
2095
2096 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2097
2098 let autoscrolled = if autoscroll_horizontally {
2099 editor.autoscroll_horizontally(
2100 start_row,
2101 text_size.x(),
2102 scroll_width,
2103 em_width,
2104 &line_layouts,
2105 cx,
2106 )
2107 } else {
2108 false
2109 };
2110
2111 if clamped || autoscrolled {
2112 snapshot = editor.snapshot(cx);
2113 }
2114
2115 let newest_selection_head = editor
2116 .selections
2117 .newest::<usize>(cx)
2118 .head()
2119 .to_display_point(&snapshot);
2120 let style = editor.style(cx);
2121
2122 let mut context_menu = None;
2123 let mut code_actions_indicator = None;
2124 if (start_row..end_row).contains(&newest_selection_head.row()) {
2125 if editor.context_menu_visible() {
2126 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2127 }
2128
2129 let active = matches!(
2130 editor.context_menu,
2131 Some(crate::ContextMenu::CodeActions(_))
2132 );
2133
2134 code_actions_indicator = editor
2135 .render_code_actions_indicator(&style, active, cx)
2136 .map(|indicator| (newest_selection_head.row(), indicator));
2137 }
2138
2139 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2140 let mut hover = editor
2141 .hover_state
2142 .render(&snapshot, &style, visible_rows, cx);
2143 let mode = editor.mode;
2144
2145 let mut fold_indicators = editor.render_fold_indicators(
2146 fold_statuses,
2147 &style,
2148 editor.gutter_hovered,
2149 line_height,
2150 gutter_margin,
2151 cx,
2152 );
2153
2154 if let Some((_, context_menu)) = context_menu.as_mut() {
2155 context_menu.layout(
2156 SizeConstraint {
2157 min: Vector2F::zero(),
2158 max: vec2f(
2159 cx.window_size().x() * 0.7,
2160 (12. * line_height).min((size.y() - line_height) / 2.),
2161 ),
2162 },
2163 editor,
2164 cx,
2165 );
2166 }
2167
2168 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2169 indicator.layout(
2170 SizeConstraint::strict_along(
2171 Axis::Vertical,
2172 line_height * style.code_actions.vertical_scale,
2173 ),
2174 editor,
2175 cx,
2176 );
2177 }
2178
2179 for fold_indicator in fold_indicators.iter_mut() {
2180 if let Some(indicator) = fold_indicator.as_mut() {
2181 indicator.layout(
2182 SizeConstraint::strict_along(
2183 Axis::Vertical,
2184 line_height * style.code_actions.vertical_scale,
2185 ),
2186 editor,
2187 cx,
2188 );
2189 }
2190 }
2191
2192 if let Some((_, hover_popovers)) = hover.as_mut() {
2193 for hover_popover in hover_popovers.iter_mut() {
2194 hover_popover.layout(
2195 SizeConstraint {
2196 min: Vector2F::zero(),
2197 max: vec2f(
2198 (120. * em_width) // Default size
2199 .min(size.x() / 2.) // Shrink to half of the editor width
2200 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2201 (16. * line_height) // Default size
2202 .min(size.y() / 2.) // Shrink to half of the editor height
2203 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2204 ),
2205 },
2206 editor,
2207 cx,
2208 );
2209 }
2210 }
2211
2212 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2213 let invisible_symbol_style = RunStyle {
2214 color: self.style.whitespace,
2215 font_id: self.style.text.font_id,
2216 underline: Default::default(),
2217 };
2218
2219 (
2220 size,
2221 LayoutState {
2222 mode,
2223 position_map: Arc::new(PositionMap {
2224 size,
2225 scroll_max,
2226 line_layouts,
2227 line_height,
2228 em_width,
2229 em_advance,
2230 snapshot,
2231 }),
2232 visible_display_row_range: start_row..end_row,
2233 gutter_size,
2234 gutter_padding,
2235 text_size,
2236 scrollbar_row_range,
2237 show_scrollbars,
2238 max_row,
2239 gutter_margin,
2240 active_rows,
2241 highlighted_rows,
2242 highlighted_ranges,
2243 fold_ranges,
2244 line_number_layouts,
2245 display_hunks,
2246 blocks,
2247 selections,
2248 context_menu,
2249 code_actions_indicator,
2250 fold_indicators,
2251 tab_invisible: cx.text_layout_cache().layout_str(
2252 "→",
2253 invisible_symbol_font_size,
2254 &[("→".len(), invisible_symbol_style)],
2255 ),
2256 space_invisible: cx.text_layout_cache().layout_str(
2257 "•",
2258 invisible_symbol_font_size,
2259 &[("•".len(), invisible_symbol_style)],
2260 ),
2261 hover_popovers: hover,
2262 },
2263 )
2264 }
2265
2266 fn paint(
2267 &mut self,
2268 scene: &mut SceneBuilder,
2269 bounds: RectF,
2270 visible_bounds: RectF,
2271 layout: &mut Self::LayoutState,
2272 editor: &mut Editor,
2273 cx: &mut ViewContext<Editor>,
2274 ) -> Self::PaintState {
2275 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2276 scene.push_layer(Some(visible_bounds));
2277
2278 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2279 let text_bounds = RectF::new(
2280 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2281 layout.text_size,
2282 );
2283
2284 Self::attach_mouse_handlers(
2285 scene,
2286 &layout.position_map,
2287 layout.hover_popovers.is_some(),
2288 visible_bounds,
2289 text_bounds,
2290 gutter_bounds,
2291 bounds,
2292 cx,
2293 );
2294
2295 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2296 if layout.gutter_size.x() > 0. {
2297 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2298 }
2299 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2300
2301 scene.push_layer(Some(bounds));
2302 if !layout.blocks.is_empty() {
2303 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2304 }
2305 self.paint_scrollbar(scene, bounds, layout, cx);
2306 scene.pop_layer();
2307
2308 scene.pop_layer();
2309 }
2310
2311 fn rect_for_text_range(
2312 &self,
2313 range_utf16: Range<usize>,
2314 bounds: RectF,
2315 _: RectF,
2316 layout: &Self::LayoutState,
2317 _: &Self::PaintState,
2318 _: &Editor,
2319 _: &ViewContext<Editor>,
2320 ) -> Option<RectF> {
2321 let text_bounds = RectF::new(
2322 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2323 layout.text_size,
2324 );
2325 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2326 let scroll_position = layout.position_map.snapshot.scroll_position();
2327 let start_row = scroll_position.y() as u32;
2328 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2329 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2330
2331 let range_start = OffsetUtf16(range_utf16.start)
2332 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2333 if range_start.row() < start_row {
2334 return None;
2335 }
2336
2337 let line = &layout
2338 .position_map
2339 .line_layouts
2340 .get((range_start.row() - start_row) as usize)?
2341 .line;
2342 let range_start_x = line.x_for_index(range_start.column() as usize);
2343 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2344 Some(RectF::new(
2345 content_origin
2346 + vec2f(
2347 range_start_x,
2348 range_start_y + layout.position_map.line_height,
2349 )
2350 - vec2f(scroll_left, scroll_top),
2351 vec2f(
2352 layout.position_map.em_width,
2353 layout.position_map.line_height,
2354 ),
2355 ))
2356 }
2357
2358 fn debug(
2359 &self,
2360 bounds: RectF,
2361 _: &Self::LayoutState,
2362 _: &Self::PaintState,
2363 _: &Editor,
2364 _: &ViewContext<Editor>,
2365 ) -> json::Value {
2366 json!({
2367 "type": "BufferElement",
2368 "bounds": bounds.to_json()
2369 })
2370 }
2371}
2372
2373type BufferRow = u32;
2374
2375pub struct LayoutState {
2376 position_map: Arc<PositionMap>,
2377 gutter_size: Vector2F,
2378 gutter_padding: f32,
2379 gutter_margin: f32,
2380 text_size: Vector2F,
2381 mode: EditorMode,
2382 visible_display_row_range: Range<u32>,
2383 active_rows: BTreeMap<u32, bool>,
2384 highlighted_rows: Option<Range<u32>>,
2385 line_number_layouts: Vec<Option<text_layout::Line>>,
2386 display_hunks: Vec<DisplayDiffHunk>,
2387 blocks: Vec<BlockLayout>,
2388 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2389 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2390 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2391 scrollbar_row_range: Range<f32>,
2392 show_scrollbars: bool,
2393 max_row: u32,
2394 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2395 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2396 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2397 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2398 tab_invisible: Line,
2399 space_invisible: Line,
2400}
2401
2402struct PositionMap {
2403 size: Vector2F,
2404 line_height: f32,
2405 scroll_max: Vector2F,
2406 em_width: f32,
2407 em_advance: f32,
2408 line_layouts: Vec<LineWithInvisibles>,
2409 snapshot: EditorSnapshot,
2410}
2411
2412impl PositionMap {
2413 /// Returns two display points:
2414 /// 1. The nearest *valid* position in the editor
2415 /// 2. An unclipped, potentially *invalid* position that maps directly to
2416 /// the given pixel position.
2417 fn point_for_position(
2418 &self,
2419 text_bounds: RectF,
2420 position: Vector2F,
2421 ) -> (DisplayPoint, DisplayPoint) {
2422 let scroll_position = self.snapshot.scroll_position();
2423 let position = position - text_bounds.origin();
2424 let y = position.y().max(0.0).min(self.size.y());
2425 let x = position.x() + (scroll_position.x() * self.em_width);
2426 let row = (y / self.line_height + scroll_position.y()) as u32;
2427 let (column, x_overshoot) = if let Some(line) = self
2428 .line_layouts
2429 .get(row as usize - scroll_position.y() as usize)
2430 .map(|line_with_spaces| &line_with_spaces.line)
2431 {
2432 if let Some(ix) = line.index_for_x(x) {
2433 (ix as u32, 0.0)
2434 } else {
2435 (line.len() as u32, 0f32.max(x - line.width()))
2436 }
2437 } else {
2438 (0, x)
2439 };
2440
2441 let mut target_point = DisplayPoint::new(row, column);
2442 let point = self.snapshot.clip_point(target_point, Bias::Left);
2443 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2444
2445 (point, target_point)
2446 }
2447}
2448
2449struct BlockLayout {
2450 row: u32,
2451 element: AnyElement<Editor>,
2452 style: BlockStyle,
2453}
2454
2455fn layout_line(
2456 row: u32,
2457 snapshot: &EditorSnapshot,
2458 style: &EditorStyle,
2459 layout_cache: &TextLayoutCache,
2460) -> text_layout::Line {
2461 let mut line = snapshot.line(row);
2462
2463 if line.len() > MAX_LINE_LEN {
2464 let mut len = MAX_LINE_LEN;
2465 while !line.is_char_boundary(len) {
2466 len -= 1;
2467 }
2468
2469 line.truncate(len);
2470 }
2471
2472 layout_cache.layout_str(
2473 &line,
2474 style.text.font_size,
2475 &[(
2476 snapshot.line_len(row) as usize,
2477 RunStyle {
2478 font_id: style.text.font_id,
2479 color: Color::black(),
2480 underline: Default::default(),
2481 },
2482 )],
2483 )
2484}
2485
2486#[derive(Debug)]
2487pub struct Cursor {
2488 origin: Vector2F,
2489 block_width: f32,
2490 line_height: f32,
2491 color: Color,
2492 shape: CursorShape,
2493 block_text: Option<Line>,
2494}
2495
2496impl Cursor {
2497 pub fn new(
2498 origin: Vector2F,
2499 block_width: f32,
2500 line_height: f32,
2501 color: Color,
2502 shape: CursorShape,
2503 block_text: Option<Line>,
2504 ) -> Cursor {
2505 Cursor {
2506 origin,
2507 block_width,
2508 line_height,
2509 color,
2510 shape,
2511 block_text,
2512 }
2513 }
2514
2515 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2516 RectF::new(
2517 self.origin + origin,
2518 vec2f(self.block_width, self.line_height),
2519 )
2520 }
2521
2522 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2523 let bounds = match self.shape {
2524 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2525 CursorShape::Block | CursorShape::Hollow => RectF::new(
2526 self.origin + origin,
2527 vec2f(self.block_width, self.line_height),
2528 ),
2529 CursorShape::Underscore => RectF::new(
2530 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2531 vec2f(self.block_width, 2.0),
2532 ),
2533 };
2534
2535 //Draw background or border quad
2536 if matches!(self.shape, CursorShape::Hollow) {
2537 scene.push_quad(Quad {
2538 bounds,
2539 background: None,
2540 border: Border::all(1., self.color),
2541 corner_radius: 0.,
2542 });
2543 } else {
2544 scene.push_quad(Quad {
2545 bounds,
2546 background: Some(self.color),
2547 border: Default::default(),
2548 corner_radius: 0.,
2549 });
2550 }
2551
2552 if let Some(block_text) = &self.block_text {
2553 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2554 }
2555 }
2556
2557 pub fn shape(&self) -> CursorShape {
2558 self.shape
2559 }
2560}
2561
2562#[derive(Debug)]
2563pub struct HighlightedRange {
2564 pub start_y: f32,
2565 pub line_height: f32,
2566 pub lines: Vec<HighlightedRangeLine>,
2567 pub color: Color,
2568 pub corner_radius: f32,
2569}
2570
2571#[derive(Debug)]
2572pub struct HighlightedRangeLine {
2573 pub start_x: f32,
2574 pub end_x: f32,
2575}
2576
2577impl HighlightedRange {
2578 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2579 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2580 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2581 self.paint_lines(
2582 self.start_y + self.line_height,
2583 &self.lines[1..],
2584 bounds,
2585 scene,
2586 );
2587 } else {
2588 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2589 }
2590 }
2591
2592 fn paint_lines(
2593 &self,
2594 start_y: f32,
2595 lines: &[HighlightedRangeLine],
2596 bounds: RectF,
2597 scene: &mut SceneBuilder,
2598 ) {
2599 if lines.is_empty() {
2600 return;
2601 }
2602
2603 let mut path = PathBuilder::new();
2604 let first_line = lines.first().unwrap();
2605 let last_line = lines.last().unwrap();
2606
2607 let first_top_left = vec2f(first_line.start_x, start_y);
2608 let first_top_right = vec2f(first_line.end_x, start_y);
2609
2610 let curve_height = vec2f(0., self.corner_radius);
2611 let curve_width = |start_x: f32, end_x: f32| {
2612 let max = (end_x - start_x) / 2.;
2613 let width = if max < self.corner_radius {
2614 max
2615 } else {
2616 self.corner_radius
2617 };
2618
2619 vec2f(width, 0.)
2620 };
2621
2622 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2623 path.reset(first_top_right - top_curve_width);
2624 path.curve_to(first_top_right + curve_height, first_top_right);
2625
2626 let mut iter = lines.iter().enumerate().peekable();
2627 while let Some((ix, line)) = iter.next() {
2628 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2629
2630 if let Some((_, next_line)) = iter.peek() {
2631 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2632
2633 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2634 Ordering::Equal => {
2635 path.line_to(bottom_right);
2636 }
2637 Ordering::Less => {
2638 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2639 path.line_to(bottom_right - curve_height);
2640 if self.corner_radius > 0. {
2641 path.curve_to(bottom_right - curve_width, bottom_right);
2642 }
2643 path.line_to(next_top_right + curve_width);
2644 if self.corner_radius > 0. {
2645 path.curve_to(next_top_right + curve_height, next_top_right);
2646 }
2647 }
2648 Ordering::Greater => {
2649 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2650 path.line_to(bottom_right - curve_height);
2651 if self.corner_radius > 0. {
2652 path.curve_to(bottom_right + curve_width, bottom_right);
2653 }
2654 path.line_to(next_top_right - curve_width);
2655 if self.corner_radius > 0. {
2656 path.curve_to(next_top_right + curve_height, next_top_right);
2657 }
2658 }
2659 }
2660 } else {
2661 let curve_width = curve_width(line.start_x, line.end_x);
2662 path.line_to(bottom_right - curve_height);
2663 if self.corner_radius > 0. {
2664 path.curve_to(bottom_right - curve_width, bottom_right);
2665 }
2666
2667 let bottom_left = vec2f(line.start_x, bottom_right.y());
2668 path.line_to(bottom_left + curve_width);
2669 if self.corner_radius > 0. {
2670 path.curve_to(bottom_left - curve_height, bottom_left);
2671 }
2672 }
2673 }
2674
2675 if first_line.start_x > last_line.start_x {
2676 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2677 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2678 path.line_to(second_top_left + curve_height);
2679 if self.corner_radius > 0. {
2680 path.curve_to(second_top_left + curve_width, second_top_left);
2681 }
2682 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2683 path.line_to(first_bottom_left - curve_width);
2684 if self.corner_radius > 0. {
2685 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2686 }
2687 }
2688
2689 path.line_to(first_top_left + curve_height);
2690 if self.corner_radius > 0. {
2691 path.curve_to(first_top_left + top_curve_width, first_top_left);
2692 }
2693 path.line_to(first_top_right - top_curve_width);
2694
2695 scene.push_path(path.build(self.color, Some(bounds)));
2696 }
2697}
2698
2699fn position_to_display_point(
2700 position: Vector2F,
2701 text_bounds: RectF,
2702 position_map: &PositionMap,
2703) -> Option<DisplayPoint> {
2704 if text_bounds.contains_point(position) {
2705 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2706 if point == target_point {
2707 Some(point)
2708 } else {
2709 None
2710 }
2711 } else {
2712 None
2713 }
2714}
2715
2716fn range_to_bounds(
2717 range: &Range<DisplayPoint>,
2718 content_origin: Vector2F,
2719 scroll_left: f32,
2720 scroll_top: f32,
2721 visible_row_range: &Range<u32>,
2722 line_end_overshoot: f32,
2723 position_map: &PositionMap,
2724) -> impl Iterator<Item = RectF> {
2725 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2726
2727 if range.start == range.end {
2728 return bounds.into_iter();
2729 }
2730
2731 let start_row = visible_row_range.start;
2732 let end_row = visible_row_range.end;
2733
2734 let row_range = if range.end.column() == 0 {
2735 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2736 } else {
2737 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2738 };
2739
2740 let first_y =
2741 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2742
2743 for (idx, row) in row_range.enumerate() {
2744 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2745
2746 let start_x = if row == range.start.row() {
2747 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2748 - scroll_left
2749 } else {
2750 content_origin.x() - scroll_left
2751 };
2752
2753 let end_x = if row == range.end.row() {
2754 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2755 } else {
2756 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2757 };
2758
2759 bounds.push(RectF::from_points(
2760 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2761 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2762 ))
2763 }
2764
2765 bounds.into_iter()
2766}
2767
2768pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2769 delta.powf(1.5) / 100.0
2770}
2771
2772fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2773 delta.powf(1.2) / 300.0
2774}
2775
2776#[cfg(test)]
2777mod tests {
2778 use super::*;
2779 use crate::{
2780 display_map::{BlockDisposition, BlockProperties},
2781 Editor, MultiBuffer,
2782 };
2783 use gpui::TestAppContext;
2784 use settings::Settings;
2785 use std::{num::NonZeroU32, sync::Arc};
2786 use util::test::sample_text;
2787
2788 #[gpui::test]
2789 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2790 cx.update(|cx| cx.set_global(Settings::test(cx)));
2791 let (_, editor) = cx.add_window(|cx| {
2792 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2793 Editor::new(EditorMode::Full, buffer, None, None, cx)
2794 });
2795 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2796
2797 let layouts = editor.update(cx, |editor, cx| {
2798 let snapshot = editor.snapshot(cx);
2799 element
2800 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2801 .0
2802 });
2803 assert_eq!(layouts.len(), 6);
2804 }
2805
2806 #[gpui::test]
2807 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2808 cx.update(|cx| cx.set_global(Settings::test(cx)));
2809 let (_, editor) = cx.add_window(|cx| {
2810 let buffer = MultiBuffer::build_simple("", cx);
2811 Editor::new(EditorMode::Full, buffer, None, None, cx)
2812 });
2813
2814 editor.update(cx, |editor, cx| {
2815 editor.set_placeholder_text("hello", cx);
2816 editor.insert_blocks(
2817 [BlockProperties {
2818 style: BlockStyle::Fixed,
2819 disposition: BlockDisposition::Above,
2820 height: 3,
2821 position: Anchor::min(),
2822 render: Arc::new(|_| Empty::new().into_any()),
2823 }],
2824 cx,
2825 );
2826
2827 // Blur the editor so that it displays placeholder text.
2828 cx.blur();
2829 });
2830
2831 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2832 let (size, mut state) = editor.update(cx, |editor, cx| {
2833 let mut new_parents = Default::default();
2834 let mut notify_views_if_parents_change = Default::default();
2835 let mut layout_cx = LayoutContext::new(
2836 cx,
2837 &mut new_parents,
2838 &mut notify_views_if_parents_change,
2839 false,
2840 );
2841 element.layout(
2842 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2843 editor,
2844 &mut layout_cx,
2845 )
2846 });
2847
2848 assert_eq!(state.position_map.line_layouts.len(), 4);
2849 assert_eq!(
2850 state
2851 .line_number_layouts
2852 .iter()
2853 .map(Option::is_some)
2854 .collect::<Vec<_>>(),
2855 &[false, false, false, true]
2856 );
2857
2858 // Don't panic.
2859 let mut scene = SceneBuilder::new(1.0);
2860 let bounds = RectF::new(Default::default(), size);
2861 editor.update(cx, |editor, cx| {
2862 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2863 });
2864 }
2865
2866 #[gpui::test]
2867 fn test_both_invisible_kinds_drawing(cx: &mut TestAppContext) {
2868 let tab_size = 4;
2869 let input_text = "\t\t\t| | a b";
2870 let expected_invisibles = vec![
2871 Invisible::Tab {
2872 line_start_offset: 0,
2873 },
2874 Invisible::Tab {
2875 line_start_offset: tab_size as usize,
2876 },
2877 Invisible::Tab {
2878 line_start_offset: tab_size as usize * 2,
2879 },
2880 Invisible::Whitespace {
2881 line_offset: tab_size as usize * 3 + 1,
2882 },
2883 Invisible::Whitespace {
2884 line_offset: tab_size as usize * 3 + 3,
2885 },
2886 Invisible::Whitespace {
2887 line_offset: tab_size as usize * 3 + 5,
2888 },
2889 ];
2890 assert_eq!(
2891 expected_invisibles.len(),
2892 input_text
2893 .chars()
2894 .filter(|initial_char| initial_char.is_whitespace())
2895 .count()
2896 );
2897
2898 cx.update(|cx| {
2899 let mut test_settings = Settings::test(cx);
2900 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
2901 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(tab_size).unwrap());
2902 cx.set_global(test_settings);
2903 });
2904 let (_, editor) = cx.add_window(|cx| {
2905 let buffer = MultiBuffer::build_simple(&input_text, cx);
2906 Editor::new(EditorMode::Full, buffer, None, None, cx)
2907 });
2908
2909 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2910 let (_, layout_state) = editor.update(cx, |editor, cx| {
2911 let mut new_parents = Default::default();
2912 let mut notify_views_if_parents_change = Default::default();
2913 let mut layout_cx = LayoutContext::new(
2914 cx,
2915 &mut new_parents,
2916 &mut notify_views_if_parents_change,
2917 false,
2918 );
2919 element.layout(
2920 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2921 editor,
2922 &mut layout_cx,
2923 )
2924 });
2925
2926 let line_layouts = &layout_state.position_map.line_layouts;
2927 let actual_invisibles = line_layouts
2928 .iter()
2929 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
2930 .flatten()
2931 .sorted_by(|invisible_1, invisible_2| invisible_1.offset().cmp(&invisible_2.offset()))
2932 .cloned()
2933 .collect::<Vec<_>>();
2934
2935 assert_eq!(expected_invisibles, actual_invisibles);
2936 }
2937
2938 #[gpui::test]
2939 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
2940 cx.update(|cx| {
2941 let mut test_settings = Settings::test(cx);
2942 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
2943 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(4).unwrap());
2944 cx.set_global(test_settings);
2945 });
2946
2947 for editor_mode_without_invisibles in [
2948 EditorMode::SingleLine,
2949 EditorMode::AutoHeight { max_lines: 100 },
2950 ] {
2951 let (_, editor) = cx.add_window(|cx| {
2952 let buffer = MultiBuffer::build_simple("\t\t\t| | a b", cx);
2953 Editor::new(editor_mode_without_invisibles, buffer, None, None, cx)
2954 });
2955
2956 let mut element =
2957 EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2958 let (_, layout_state) = editor.update(cx, |editor, cx| {
2959 let mut new_parents = Default::default();
2960 let mut notify_views_if_parents_change = Default::default();
2961 let mut layout_cx = LayoutContext::new(
2962 cx,
2963 &mut new_parents,
2964 &mut notify_views_if_parents_change,
2965 false,
2966 );
2967 element.layout(
2968 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2969 editor,
2970 &mut layout_cx,
2971 )
2972 });
2973
2974 let line_layouts = &layout_state.position_map.line_layouts;
2975 let invisibles = line_layouts
2976 .iter()
2977 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
2978 .flatten()
2979 .sorted_by(|invisible_1, invisible_2| {
2980 invisible_1.offset().cmp(&invisible_2.offset())
2981 })
2982 .cloned()
2983 .collect::<Vec<_>>();
2984
2985 assert!(invisibles.is_empty(),
2986 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
2987 }
2988 }
2989}