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 editor_settings::ShowScrollbar,
9 git::{diff_hunk_to_display, DisplayDiffHunk},
10 hover_popover::{
11 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
12 MIN_POPOVER_LINE_HEIGHT,
13 },
14 link_go_to_definition::{
15 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
16 },
17 mouse_context_menu, EditorSettings, EditorStyle, GutterHover, UnfoldAt,
18};
19use clock::ReplicaId;
20use collections::{BTreeMap, HashMap};
21use git::diff::DiffHunkStatus;
22use gpui::{
23 color::Color,
24 elements::*,
25 fonts::{HighlightStyle, TextStyle, Underline},
26 geometry::{
27 rect::RectF,
28 vector::{vec2f, Vector2F},
29 PathBuilder,
30 },
31 json::{self, ToJson},
32 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
33 text_layout::{self, Line, RunStyle, TextLayoutCache},
34 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
35 MouseRegion, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
36};
37use itertools::Itertools;
38use json::json;
39use language::{
40 language_settings::ShowWhitespaceSetting, Bias, CursorShape, DiagnosticSeverity, OffsetUtf16,
41 Selection,
42};
43use project::{
44 project_settings::{GitGutterSetting, ProjectSettings},
45 ProjectPath,
46};
47use smallvec::SmallVec;
48use std::{
49 borrow::Cow,
50 cmp::{self, Ordering},
51 fmt::Write,
52 iter,
53 ops::Range,
54 sync::Arc,
55};
56use text::Point;
57use workspace::item::Item;
58
59enum FoldMarkers {}
60
61struct SelectionLayout {
62 head: DisplayPoint,
63 cursor_shape: CursorShape,
64 range: Range<DisplayPoint>,
65}
66
67impl SelectionLayout {
68 fn new<T: ToPoint + ToDisplayPoint + Clone>(
69 selection: Selection<T>,
70 line_mode: bool,
71 cursor_shape: CursorShape,
72 map: &DisplaySnapshot,
73 ) -> Self {
74 if line_mode {
75 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
76 let point_range = map.expand_to_line(selection.range());
77 Self {
78 head: selection.head().to_display_point(map),
79 cursor_shape,
80 range: point_range.start.to_display_point(map)
81 ..point_range.end.to_display_point(map),
82 }
83 } else {
84 let selection = selection.map(|p| p.to_display_point(map));
85 Self {
86 head: selection.head(),
87 cursor_shape,
88 range: selection.range(),
89 }
90 }
91 }
92}
93
94pub struct EditorElement {
95 style: Arc<EditorStyle>,
96}
97
98impl EditorElement {
99 pub fn new(style: EditorStyle) -> Self {
100 Self {
101 style: Arc::new(style),
102 }
103 }
104
105 fn attach_mouse_handlers(
106 scene: &mut SceneBuilder,
107 position_map: &Arc<PositionMap>,
108 has_popovers: bool,
109 visible_bounds: RectF,
110 text_bounds: RectF,
111 gutter_bounds: RectF,
112 bounds: RectF,
113 cx: &mut ViewContext<Editor>,
114 ) {
115 enum EditorElementMouseHandlers {}
116 scene.push_mouse_region(
117 MouseRegion::new::<EditorElementMouseHandlers>(
118 cx.view_id(),
119 cx.view_id(),
120 visible_bounds,
121 )
122 .on_down(MouseButton::Left, {
123 let position_map = position_map.clone();
124 move |event, editor, cx| {
125 if !Self::mouse_down(
126 editor,
127 event.platform_event,
128 position_map.as_ref(),
129 text_bounds,
130 gutter_bounds,
131 cx,
132 ) {
133 cx.propagate_event();
134 }
135 }
136 })
137 .on_down(MouseButton::Right, {
138 let position_map = position_map.clone();
139 move |event, editor, cx| {
140 if !Self::mouse_right_down(
141 editor,
142 event.position,
143 position_map.as_ref(),
144 text_bounds,
145 cx,
146 ) {
147 cx.propagate_event();
148 }
149 }
150 })
151 .on_up(MouseButton::Left, {
152 let position_map = position_map.clone();
153 move |event, editor, cx| {
154 if !Self::mouse_up(
155 editor,
156 event.position,
157 event.cmd,
158 event.shift,
159 position_map.as_ref(),
160 text_bounds,
161 cx,
162 ) {
163 cx.propagate_event()
164 }
165 }
166 })
167 .on_drag(MouseButton::Left, {
168 let position_map = position_map.clone();
169 move |event, editor, cx| {
170 if !Self::mouse_dragged(
171 editor,
172 event.platform_event,
173 position_map.as_ref(),
174 text_bounds,
175 cx,
176 ) {
177 cx.propagate_event()
178 }
179 }
180 })
181 .on_move({
182 let position_map = position_map.clone();
183 move |event, editor, cx| {
184 if !Self::mouse_moved(
185 editor,
186 event.platform_event,
187 &position_map,
188 text_bounds,
189 cx,
190 ) {
191 cx.propagate_event()
192 }
193 }
194 })
195 .on_move_out(move |_, editor: &mut Editor, cx| {
196 if has_popovers {
197 hide_hover(editor, cx);
198 }
199 })
200 .on_scroll({
201 let position_map = position_map.clone();
202 move |event, editor, cx| {
203 if !Self::scroll(
204 editor,
205 event.position,
206 *event.delta.raw(),
207 event.delta.precise(),
208 &position_map,
209 bounds,
210 cx,
211 ) {
212 cx.propagate_event()
213 }
214 }
215 }),
216 );
217
218 enum GutterHandlers {}
219 scene.push_mouse_region(
220 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
221 .on_hover(|hover, editor: &mut Editor, cx| {
222 editor.gutter_hover(
223 &GutterHover {
224 hovered: hover.started,
225 },
226 cx,
227 );
228 }),
229 )
230 }
231
232 fn mouse_down(
233 editor: &mut Editor,
234 MouseButtonEvent {
235 position,
236 modifiers:
237 Modifiers {
238 shift,
239 ctrl,
240 alt,
241 cmd,
242 ..
243 },
244 mut click_count,
245 ..
246 }: MouseButtonEvent,
247 position_map: &PositionMap,
248 text_bounds: RectF,
249 gutter_bounds: RectF,
250 cx: &mut EventContext<Editor>,
251 ) -> bool {
252 if gutter_bounds.contains_point(position) {
253 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
254 } else if !text_bounds.contains_point(position) {
255 return false;
256 }
257
258 let (position, target_position) = position_map.point_for_position(text_bounds, position);
259
260 if shift && alt {
261 editor.select(
262 SelectPhase::BeginColumnar {
263 position,
264 goal_column: target_position.column(),
265 },
266 cx,
267 );
268 } else if shift && !ctrl && !alt && !cmd {
269 editor.select(
270 SelectPhase::Extend {
271 position,
272 click_count,
273 },
274 cx,
275 );
276 } else {
277 editor.select(
278 SelectPhase::Begin {
279 position,
280 add: alt,
281 click_count,
282 },
283 cx,
284 );
285 }
286
287 true
288 }
289
290 fn mouse_right_down(
291 editor: &mut Editor,
292 position: Vector2F,
293 position_map: &PositionMap,
294 text_bounds: RectF,
295 cx: &mut EventContext<Editor>,
296 ) -> bool {
297 if !text_bounds.contains_point(position) {
298 return false;
299 }
300
301 let (point, _) = position_map.point_for_position(text_bounds, position);
302 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
303 true
304 }
305
306 fn mouse_up(
307 editor: &mut Editor,
308 position: Vector2F,
309 cmd: bool,
310 shift: bool,
311 position_map: &PositionMap,
312 text_bounds: RectF,
313 cx: &mut EventContext<Editor>,
314 ) -> bool {
315 let end_selection = editor.has_pending_selection();
316 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
317
318 if end_selection {
319 editor.select(SelectPhase::End, cx);
320 }
321
322 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
323 let (point, target_point) = position_map.point_for_position(text_bounds, position);
324
325 if point == target_point {
326 if shift {
327 go_to_fetched_type_definition(editor, point, cx);
328 } else {
329 go_to_fetched_definition(editor, point, cx);
330 }
331
332 return true;
333 }
334 }
335
336 end_selection
337 }
338
339 fn mouse_dragged(
340 editor: &mut Editor,
341 MouseMovedEvent {
342 modifiers: Modifiers { cmd, shift, .. },
343 position,
344 ..
345 }: MouseMovedEvent,
346 position_map: &PositionMap,
347 text_bounds: RectF,
348 cx: &mut EventContext<Editor>,
349 ) -> bool {
350 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
351 // Don't trigger hover popover if mouse is hovering over context menu
352 let point = if text_bounds.contains_point(position) {
353 let (point, target_point) = position_map.point_for_position(text_bounds, position);
354 if point == target_point {
355 Some(point)
356 } else {
357 None
358 }
359 } else {
360 None
361 };
362
363 update_go_to_definition_link(editor, point, cmd, shift, cx);
364
365 if editor.has_pending_selection() {
366 let mut scroll_delta = Vector2F::zero();
367
368 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
369 let top = text_bounds.origin_y() + vertical_margin;
370 let bottom = text_bounds.lower_left().y() - vertical_margin;
371 if position.y() < top {
372 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
373 }
374 if position.y() > bottom {
375 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
376 }
377
378 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
379 let left = text_bounds.origin_x() + horizontal_margin;
380 let right = text_bounds.upper_right().x() - horizontal_margin;
381 if position.x() < left {
382 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
383 left - position.x(),
384 ))
385 }
386 if position.x() > right {
387 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
388 position.x() - right,
389 ))
390 }
391
392 let (position, target_position) =
393 position_map.point_for_position(text_bounds, position);
394
395 editor.select(
396 SelectPhase::Update {
397 position,
398 goal_column: target_position.column(),
399 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
400 .clamp(Vector2F::zero(), position_map.scroll_max),
401 },
402 cx,
403 );
404 hover_at(editor, point, cx);
405 true
406 } else {
407 hover_at(editor, point, cx);
408 false
409 }
410 }
411
412 fn mouse_moved(
413 editor: &mut Editor,
414 MouseMovedEvent {
415 modifiers: Modifiers { shift, cmd, .. },
416 position,
417 ..
418 }: MouseMovedEvent,
419 position_map: &PositionMap,
420 text_bounds: RectF,
421 cx: &mut ViewContext<Editor>,
422 ) -> bool {
423 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
424 // Don't trigger hover popover if mouse is hovering over context menu
425 let point = position_to_display_point(position, text_bounds, position_map);
426
427 update_go_to_definition_link(editor, point, cmd, shift, cx);
428 hover_at(editor, point, cx);
429
430 true
431 }
432
433 fn scroll(
434 editor: &mut Editor,
435 position: Vector2F,
436 mut delta: Vector2F,
437 precise: bool,
438 position_map: &PositionMap,
439 bounds: RectF,
440 cx: &mut ViewContext<Editor>,
441 ) -> bool {
442 if !bounds.contains_point(position) {
443 return false;
444 }
445
446 let line_height = position_map.line_height;
447 let max_glyph_width = position_map.em_width;
448
449 let axis = if precise {
450 //Trackpad
451 position_map.snapshot.ongoing_scroll.filter(&mut delta)
452 } else {
453 //Not trackpad
454 delta *= vec2f(max_glyph_width, line_height);
455 None //Resets ongoing scroll
456 };
457
458 let scroll_position = position_map.snapshot.scroll_position();
459 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
460 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
461 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
462 editor.scroll(scroll_position, axis, cx);
463
464 true
465 }
466
467 fn paint_background(
468 &self,
469 scene: &mut SceneBuilder,
470 gutter_bounds: RectF,
471 text_bounds: RectF,
472 layout: &LayoutState,
473 ) {
474 let bounds = gutter_bounds.union_rect(text_bounds);
475 let scroll_top =
476 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
477 scene.push_quad(Quad {
478 bounds: gutter_bounds,
479 background: Some(self.style.gutter_background),
480 border: Border::new(0., Color::transparent_black()),
481 corner_radius: 0.,
482 });
483 scene.push_quad(Quad {
484 bounds: text_bounds,
485 background: Some(self.style.background),
486 border: Border::new(0., Color::transparent_black()),
487 corner_radius: 0.,
488 });
489
490 if let EditorMode::Full = layout.mode {
491 let mut active_rows = layout.active_rows.iter().peekable();
492 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
493 let mut end_row = *start_row;
494 while active_rows.peek().map_or(false, |r| {
495 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
496 }) {
497 active_rows.next().unwrap();
498 end_row += 1;
499 }
500
501 if !contains_non_empty_selection {
502 let origin = vec2f(
503 bounds.origin_x(),
504 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
505 - scroll_top,
506 );
507 let size = vec2f(
508 bounds.width(),
509 layout.position_map.line_height * (end_row - start_row + 1) as f32,
510 );
511 scene.push_quad(Quad {
512 bounds: RectF::new(origin, size),
513 background: Some(self.style.active_line_background),
514 border: Border::default(),
515 corner_radius: 0.,
516 });
517 }
518 }
519
520 if let Some(highlighted_rows) = &layout.highlighted_rows {
521 let origin = vec2f(
522 bounds.origin_x(),
523 bounds.origin_y()
524 + (layout.position_map.line_height * highlighted_rows.start as f32)
525 - scroll_top,
526 );
527 let size = vec2f(
528 bounds.width(),
529 layout.position_map.line_height * highlighted_rows.len() as f32,
530 );
531 scene.push_quad(Quad {
532 bounds: RectF::new(origin, size),
533 background: Some(self.style.highlighted_line_background),
534 border: Border::default(),
535 corner_radius: 0.,
536 });
537 }
538 }
539 }
540
541 fn paint_gutter(
542 &mut self,
543 scene: &mut SceneBuilder,
544 bounds: RectF,
545 visible_bounds: RectF,
546 layout: &mut LayoutState,
547 editor: &mut Editor,
548 cx: &mut ViewContext<Editor>,
549 ) {
550 let line_height = layout.position_map.line_height;
551
552 let scroll_position = layout.position_map.snapshot.scroll_position();
553 let scroll_top = scroll_position.y() * line_height;
554
555 let show_gutter = matches!(
556 settings::get::<ProjectSettings>(cx).git.git_gutter,
557 Some(GitGutterSetting::TrackedFiles)
558 );
559
560 if show_gutter {
561 Self::paint_diff_hunks(scene, bounds, layout, cx);
562 }
563
564 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
565 if let Some(line) = line {
566 let line_origin = bounds.origin()
567 + vec2f(
568 bounds.width() - line.width() - layout.gutter_padding,
569 ix as f32 * line_height - (scroll_top % line_height),
570 );
571
572 line.paint(scene, line_origin, visible_bounds, line_height, cx);
573 }
574 }
575
576 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
577 if let Some(indicator) = fold_indicator.as_mut() {
578 let position = vec2f(
579 bounds.width() - layout.gutter_padding,
580 ix as f32 * line_height - (scroll_top % line_height),
581 );
582 let centering_offset = vec2f(
583 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
584 (line_height - indicator.size().y()) / 2.,
585 );
586
587 let indicator_origin = bounds.origin() + position + centering_offset;
588
589 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
590 }
591 }
592
593 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
594 let mut x = 0.;
595 let mut y = *row as f32 * line_height - scroll_top;
596 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
597 y += (line_height - indicator.size().y()) / 2.;
598 indicator.paint(
599 scene,
600 bounds.origin() + vec2f(x, y),
601 visible_bounds,
602 editor,
603 cx,
604 );
605 }
606 }
607
608 fn paint_diff_hunks(
609 scene: &mut SceneBuilder,
610 bounds: RectF,
611 layout: &mut LayoutState,
612 cx: &mut ViewContext<Editor>,
613 ) {
614 let diff_style = &theme::current(cx).editor.diff.clone();
615 let line_height = layout.position_map.line_height;
616
617 let scroll_position = layout.position_map.snapshot.scroll_position();
618 let scroll_top = scroll_position.y() * line_height;
619
620 for hunk in &layout.display_hunks {
621 let (display_row_range, status) = match hunk {
622 //TODO: This rendering is entirely a horrible hack
623 &DisplayDiffHunk::Folded { display_row: row } => {
624 let start_y = row as f32 * line_height - scroll_top;
625 let end_y = start_y + line_height;
626
627 let width = diff_style.removed_width_em * line_height;
628 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
629 let highlight_size = vec2f(width * 2., end_y - start_y);
630 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
631
632 scene.push_quad(Quad {
633 bounds: highlight_bounds,
634 background: Some(diff_style.modified),
635 border: Border::new(0., Color::transparent_black()),
636 corner_radius: 1. * line_height,
637 });
638
639 continue;
640 }
641
642 DisplayDiffHunk::Unfolded {
643 display_row_range,
644 status,
645 } => (display_row_range, status),
646 };
647
648 let color = match status {
649 DiffHunkStatus::Added => diff_style.inserted,
650 DiffHunkStatus::Modified => diff_style.modified,
651
652 //TODO: This rendering is entirely a horrible hack
653 DiffHunkStatus::Removed => {
654 let row = display_row_range.start;
655
656 let offset = line_height / 2.;
657 let start_y = row as f32 * line_height - offset - scroll_top;
658 let end_y = start_y + line_height;
659
660 let width = diff_style.removed_width_em * line_height;
661 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
662 let highlight_size = vec2f(width * 2., end_y - start_y);
663 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
664
665 scene.push_quad(Quad {
666 bounds: highlight_bounds,
667 background: Some(diff_style.deleted),
668 border: Border::new(0., Color::transparent_black()),
669 corner_radius: 1. * line_height,
670 });
671
672 continue;
673 }
674 };
675
676 let start_row = display_row_range.start;
677 let end_row = display_row_range.end;
678
679 let start_y = start_row as f32 * line_height - scroll_top;
680 let end_y = end_row as f32 * line_height - scroll_top;
681
682 let width = diff_style.width_em * line_height;
683 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
684 let highlight_size = vec2f(width * 2., end_y - start_y);
685 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
686
687 scene.push_quad(Quad {
688 bounds: highlight_bounds,
689 background: Some(color),
690 border: Border::new(0., Color::transparent_black()),
691 corner_radius: diff_style.corner_radius * line_height,
692 });
693 }
694 }
695
696 fn paint_text(
697 &mut self,
698 scene: &mut SceneBuilder,
699 bounds: RectF,
700 visible_bounds: RectF,
701 layout: &mut LayoutState,
702 editor: &mut Editor,
703 cx: &mut ViewContext<Editor>,
704 ) {
705 let style = &self.style;
706 let local_replica_id = editor.replica_id(cx);
707 let scroll_position = layout.position_map.snapshot.scroll_position();
708 let start_row = layout.visible_display_row_range.start;
709 let scroll_top = scroll_position.y() * layout.position_map.line_height;
710 let max_glyph_width = layout.position_map.em_width;
711 let scroll_left = scroll_position.x() * max_glyph_width;
712 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
713 let line_end_overshoot = 0.15 * layout.position_map.line_height;
714 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
715
716 scene.push_layer(Some(bounds));
717
718 scene.push_cursor_region(CursorRegion {
719 bounds,
720 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
721 CursorStyle::PointingHand
722 } else {
723 CursorStyle::IBeam
724 },
725 });
726
727 let fold_corner_radius =
728 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
729 for (id, range, color) in layout.fold_ranges.iter() {
730 self.paint_highlighted_range(
731 scene,
732 range.clone(),
733 *color,
734 fold_corner_radius,
735 fold_corner_radius * 2.,
736 layout,
737 content_origin,
738 scroll_top,
739 scroll_left,
740 bounds,
741 );
742
743 for bound in range_to_bounds(
744 &range,
745 content_origin,
746 scroll_left,
747 scroll_top,
748 &layout.visible_display_row_range,
749 line_end_overshoot,
750 &layout.position_map,
751 ) {
752 scene.push_cursor_region(CursorRegion {
753 bounds: bound,
754 style: CursorStyle::PointingHand,
755 });
756
757 let display_row = range.start.row();
758
759 let buffer_row = DisplayPoint::new(display_row, 0)
760 .to_point(&layout.position_map.snapshot.display_snapshot)
761 .row;
762
763 scene.push_mouse_region(
764 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
765 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
766 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
767 })
768 .with_notify_on_hover(true)
769 .with_notify_on_click(true),
770 )
771 }
772 }
773
774 for (range, color) in &layout.highlighted_ranges {
775 self.paint_highlighted_range(
776 scene,
777 range.clone(),
778 *color,
779 0.,
780 line_end_overshoot,
781 layout,
782 content_origin,
783 scroll_top,
784 scroll_left,
785 bounds,
786 );
787 }
788
789 let mut cursors = SmallVec::<[Cursor; 32]>::new();
790 let corner_radius = 0.15 * layout.position_map.line_height;
791 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
792
793 for (replica_id, selections) in &layout.selections {
794 let replica_id = *replica_id;
795 let selection_style = style.replica_selection_style(replica_id);
796
797 for selection in selections {
798 if !selection.range.is_empty()
799 && (replica_id == local_replica_id
800 || Some(replica_id) == editor.leader_replica_id)
801 {
802 invisible_display_ranges.push(selection.range.clone());
803 }
804 self.paint_highlighted_range(
805 scene,
806 selection.range.clone(),
807 selection_style.selection,
808 corner_radius,
809 corner_radius * 2.,
810 layout,
811 content_origin,
812 scroll_top,
813 scroll_left,
814 bounds,
815 );
816
817 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
818 let cursor_position = selection.head;
819 if layout
820 .visible_display_row_range
821 .contains(&cursor_position.row())
822 {
823 let cursor_row_layout = &layout.position_map.line_layouts
824 [(cursor_position.row() - start_row) as usize]
825 .line;
826 let cursor_column = cursor_position.column() as usize;
827
828 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
829 let mut block_width =
830 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
831 if block_width == 0.0 {
832 block_width = layout.position_map.em_width;
833 }
834 let block_text = if let CursorShape::Block = selection.cursor_shape {
835 layout
836 .position_map
837 .snapshot
838 .chars_at(cursor_position)
839 .next()
840 .and_then(|(character, _)| {
841 let font_id =
842 cursor_row_layout.font_for_index(cursor_column)?;
843 let text = character.to_string();
844
845 Some(cx.text_layout_cache().layout_str(
846 &text,
847 cursor_row_layout.font_size(),
848 &[(
849 text.len(),
850 RunStyle {
851 font_id,
852 color: style.background,
853 underline: Default::default(),
854 },
855 )],
856 ))
857 })
858 } else {
859 None
860 };
861
862 let x = cursor_character_x - scroll_left;
863 let y = cursor_position.row() as f32 * layout.position_map.line_height
864 - scroll_top;
865 cursors.push(Cursor {
866 color: selection_style.cursor,
867 block_width,
868 origin: vec2f(x, y),
869 line_height: layout.position_map.line_height,
870 shape: selection.cursor_shape,
871 block_text,
872 });
873 }
874 }
875 }
876 }
877
878 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
879 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
880 let row = start_row + ix as u32;
881 line_with_invisibles.draw(
882 layout,
883 row,
884 scroll_top,
885 scene,
886 content_origin,
887 scroll_left,
888 visible_text_bounds,
889 whitespace_setting,
890 &invisible_display_ranges,
891 visible_bounds,
892 cx,
893 )
894 }
895 }
896
897 scene.paint_layer(Some(bounds), |scene| {
898 for cursor in cursors {
899 cursor.paint(scene, content_origin, cx);
900 }
901 });
902
903 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
904 scene.push_stacking_context(None, None);
905 let cursor_row_layout =
906 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
907 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
908 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
909 let mut list_origin = content_origin + vec2f(x, y);
910 let list_width = context_menu.size().x();
911 let list_height = context_menu.size().y();
912
913 // Snap the right edge of the list to the right edge of the window if
914 // its horizontal bounds overflow.
915 if list_origin.x() + list_width > cx.window_size().x() {
916 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
917 }
918
919 if list_origin.y() + list_height > bounds.max_y() {
920 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
921 }
922
923 context_menu.paint(
924 scene,
925 list_origin,
926 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
927 editor,
928 cx,
929 );
930
931 scene.pop_stacking_context();
932 }
933
934 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
935 scene.push_stacking_context(None, None);
936
937 // This is safe because we check on layout whether the required row is available
938 let hovered_row_layout =
939 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
940
941 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
942 // height. This is the size we will use to decide whether to render popovers above or below
943 // the hovered line.
944 let first_size = hover_popovers[0].size();
945 let height_to_reserve = first_size.y()
946 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
947
948 // Compute Hovered Point
949 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
950 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
951 let hovered_point = content_origin + vec2f(x, y);
952
953 if hovered_point.y() - height_to_reserve > 0.0 {
954 // There is enough space above. Render popovers above the hovered point
955 let mut current_y = hovered_point.y();
956 for hover_popover in hover_popovers {
957 let size = hover_popover.size();
958 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
959
960 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
961 if x_out_of_bounds < 0.0 {
962 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
963 }
964
965 hover_popover.paint(
966 scene,
967 popover_origin,
968 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
969 editor,
970 cx,
971 );
972
973 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
974 }
975 } else {
976 // There is not enough space above. Render popovers below the hovered point
977 let mut current_y = hovered_point.y() + layout.position_map.line_height;
978 for hover_popover in hover_popovers {
979 let size = hover_popover.size();
980 let mut popover_origin = vec2f(hovered_point.x(), current_y);
981
982 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
983 if x_out_of_bounds < 0.0 {
984 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
985 }
986
987 hover_popover.paint(
988 scene,
989 popover_origin,
990 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
991 editor,
992 cx,
993 );
994
995 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
996 }
997 }
998
999 scene.pop_stacking_context();
1000 }
1001
1002 scene.pop_layer();
1003 }
1004
1005 fn paint_scrollbar(
1006 &mut self,
1007 scene: &mut SceneBuilder,
1008 bounds: RectF,
1009 layout: &mut LayoutState,
1010 cx: &mut ViewContext<Editor>,
1011 editor: &Editor,
1012 ) {
1013 enum ScrollbarMouseHandlers {}
1014 if layout.mode != EditorMode::Full {
1015 return;
1016 }
1017
1018 let style = &self.style.theme.scrollbar;
1019
1020 let top = bounds.min_y();
1021 let bottom = bounds.max_y();
1022 let right = bounds.max_x();
1023 let left = right - style.width;
1024 let row_range = &layout.scrollbar_row_range;
1025 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1026
1027 let mut height = bounds.height();
1028 let mut first_row_y_offset = 0.0;
1029
1030 // Impose a minimum height on the scrollbar thumb
1031 let row_height = height / max_row;
1032 let min_thumb_height =
1033 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1034 let thumb_height = (row_range.end - row_range.start) * row_height;
1035 if thumb_height < min_thumb_height {
1036 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1037 height -= min_thumb_height - thumb_height;
1038 }
1039
1040 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1041
1042 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1043 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1044 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1045 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1046
1047 if layout.show_scrollbars {
1048 scene.push_quad(Quad {
1049 bounds: track_bounds,
1050 border: style.track.border,
1051 background: style.track.background_color,
1052 ..Default::default()
1053 });
1054 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1055 let theme = theme::current(cx);
1056 let scrollbar_theme = &theme.editor.scrollbar;
1057 if layout.is_singleton && scrollbar_settings.selections {
1058 let start_anchor = Anchor::min();
1059 let end_anchor = Anchor::max();
1060 for (row, _) in &editor.background_highlights_in_range(
1061 start_anchor..end_anchor,
1062 &layout.position_map.snapshot,
1063 &theme,
1064 ) {
1065 let start_display = row.start;
1066 let end_display = row.end;
1067 let start_y = y_for_row(start_display.row() as f32);
1068 let mut end_y = y_for_row((end_display.row()) as f32);
1069 if end_y - start_y < 1. {
1070 end_y = start_y + 1.;
1071 }
1072 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1073
1074 let color = scrollbar_theme.selections;
1075
1076 let border = Border {
1077 width: 1.,
1078 color: style.thumb.border.color,
1079 overlay: false,
1080 top: false,
1081 right: true,
1082 bottom: false,
1083 left: true,
1084 };
1085
1086 scene.push_quad(Quad {
1087 bounds,
1088 background: Some(color),
1089 border,
1090 corner_radius: style.thumb.corner_radius,
1091 })
1092 }
1093 }
1094
1095 if layout.is_singleton && scrollbar_settings.git_diff {
1096 let diff_style = scrollbar_theme.git.clone();
1097 for hunk in layout
1098 .position_map
1099 .snapshot
1100 .buffer_snapshot
1101 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1102 {
1103 let start_display = Point::new(hunk.buffer_range.start, 0)
1104 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1105 let end_display = Point::new(hunk.buffer_range.end, 0)
1106 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1107 let start_y = y_for_row(start_display.row() as f32);
1108 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1109 y_for_row((end_display.row() + 1) as f32)
1110 } else {
1111 y_for_row((end_display.row()) as f32)
1112 };
1113
1114 if end_y - start_y < 1. {
1115 end_y = start_y + 1.;
1116 }
1117 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1118
1119 let color = match hunk.status() {
1120 DiffHunkStatus::Added => diff_style.inserted,
1121 DiffHunkStatus::Modified => diff_style.modified,
1122 DiffHunkStatus::Removed => diff_style.deleted,
1123 };
1124
1125 let border = Border {
1126 width: 1.,
1127 color: style.thumb.border.color,
1128 overlay: false,
1129 top: false,
1130 right: true,
1131 bottom: false,
1132 left: true,
1133 };
1134
1135 scene.push_quad(Quad {
1136 bounds,
1137 background: Some(color),
1138 border,
1139 corner_radius: style.thumb.corner_radius,
1140 })
1141 }
1142 }
1143
1144 scene.push_quad(Quad {
1145 bounds: thumb_bounds,
1146 border: style.thumb.border,
1147 background: style.thumb.background_color,
1148 corner_radius: style.thumb.corner_radius,
1149 });
1150 }
1151
1152 scene.push_cursor_region(CursorRegion {
1153 bounds: track_bounds,
1154 style: CursorStyle::Arrow,
1155 });
1156 scene.push_mouse_region(
1157 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1158 .on_move(move |_, editor: &mut Editor, cx| {
1159 editor.scroll_manager.show_scrollbar(cx);
1160 })
1161 .on_down(MouseButton::Left, {
1162 let row_range = row_range.clone();
1163 move |event, editor: &mut Editor, cx| {
1164 let y = event.position.y();
1165 if y < thumb_top || thumb_bottom < y {
1166 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1167 let top_row = center_row
1168 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1169 let mut position = editor.scroll_position(cx);
1170 position.set_y(top_row as f32);
1171 editor.set_scroll_position(position, cx);
1172 } else {
1173 editor.scroll_manager.show_scrollbar(cx);
1174 }
1175 }
1176 })
1177 .on_drag(MouseButton::Left, {
1178 move |event, editor: &mut Editor, cx| {
1179 let y = event.prev_mouse_position.y();
1180 let new_y = event.position.y();
1181 if thumb_top < y && y < thumb_bottom {
1182 let mut position = editor.scroll_position(cx);
1183 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1184 if position.y() < 0.0 {
1185 position.set_y(0.);
1186 }
1187 editor.set_scroll_position(position, cx);
1188 }
1189 }
1190 }),
1191 );
1192 }
1193
1194 #[allow(clippy::too_many_arguments)]
1195 fn paint_highlighted_range(
1196 &self,
1197 scene: &mut SceneBuilder,
1198 range: Range<DisplayPoint>,
1199 color: Color,
1200 corner_radius: f32,
1201 line_end_overshoot: f32,
1202 layout: &LayoutState,
1203 content_origin: Vector2F,
1204 scroll_top: f32,
1205 scroll_left: f32,
1206 bounds: RectF,
1207 ) {
1208 let start_row = layout.visible_display_row_range.start;
1209 let end_row = layout.visible_display_row_range.end;
1210 if range.start != range.end {
1211 let row_range = if range.end.column() == 0 {
1212 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1213 } else {
1214 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1215 };
1216
1217 let highlighted_range = HighlightedRange {
1218 color,
1219 line_height: layout.position_map.line_height,
1220 corner_radius,
1221 start_y: content_origin.y()
1222 + row_range.start as f32 * layout.position_map.line_height
1223 - scroll_top,
1224 lines: row_range
1225 .into_iter()
1226 .map(|row| {
1227 let line_layout =
1228 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1229 HighlightedRangeLine {
1230 start_x: if row == range.start.row() {
1231 content_origin.x()
1232 + line_layout.x_for_index(range.start.column() as usize)
1233 - scroll_left
1234 } else {
1235 content_origin.x() - scroll_left
1236 },
1237 end_x: if row == range.end.row() {
1238 content_origin.x()
1239 + line_layout.x_for_index(range.end.column() as usize)
1240 - scroll_left
1241 } else {
1242 content_origin.x() + line_layout.width() + line_end_overshoot
1243 - scroll_left
1244 },
1245 }
1246 })
1247 .collect(),
1248 };
1249
1250 highlighted_range.paint(bounds, scene);
1251 }
1252 }
1253
1254 fn paint_blocks(
1255 &mut self,
1256 scene: &mut SceneBuilder,
1257 bounds: RectF,
1258 visible_bounds: RectF,
1259 layout: &mut LayoutState,
1260 editor: &mut Editor,
1261 cx: &mut ViewContext<Editor>,
1262 ) {
1263 let scroll_position = layout.position_map.snapshot.scroll_position();
1264 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1265 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1266
1267 for block in &mut layout.blocks {
1268 let mut origin = bounds.origin()
1269 + vec2f(
1270 0.,
1271 block.row as f32 * layout.position_map.line_height - scroll_top,
1272 );
1273 if !matches!(block.style, BlockStyle::Sticky) {
1274 origin += vec2f(-scroll_left, 0.);
1275 }
1276 block
1277 .element
1278 .paint(scene, origin, visible_bounds, editor, cx);
1279 }
1280 }
1281
1282 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1283 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1284 let style = &self.style;
1285
1286 cx.text_layout_cache()
1287 .layout_str(
1288 "1".repeat(digit_count).as_str(),
1289 style.text.font_size,
1290 &[(
1291 digit_count,
1292 RunStyle {
1293 font_id: style.text.font_id,
1294 color: Color::black(),
1295 underline: Default::default(),
1296 },
1297 )],
1298 )
1299 .width()
1300 }
1301
1302 //Folds contained in a hunk are ignored apart from shrinking visual size
1303 //If a fold contains any hunks then that fold line is marked as modified
1304 fn layout_git_gutters(
1305 &self,
1306 display_rows: Range<u32>,
1307 snapshot: &EditorSnapshot,
1308 ) -> Vec<DisplayDiffHunk> {
1309 let buffer_snapshot = &snapshot.buffer_snapshot;
1310
1311 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1312 .to_point(snapshot)
1313 .row;
1314 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1315 .to_point(snapshot)
1316 .row;
1317
1318 buffer_snapshot
1319 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1320 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1321 .dedup()
1322 .collect()
1323 }
1324
1325 fn layout_line_numbers(
1326 &self,
1327 rows: Range<u32>,
1328 active_rows: &BTreeMap<u32, bool>,
1329 is_singleton: bool,
1330 snapshot: &EditorSnapshot,
1331 cx: &ViewContext<Editor>,
1332 ) -> (
1333 Vec<Option<text_layout::Line>>,
1334 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1335 ) {
1336 let style = &self.style;
1337 let include_line_numbers = snapshot.mode == EditorMode::Full;
1338 let mut line_number_layouts = Vec::with_capacity(rows.len());
1339 let mut fold_statuses = Vec::with_capacity(rows.len());
1340 let mut line_number = String::new();
1341 for (ix, row) in snapshot
1342 .buffer_rows(rows.start)
1343 .take((rows.end - rows.start) as usize)
1344 .enumerate()
1345 {
1346 let display_row = rows.start + ix as u32;
1347 let (active, color) = if active_rows.contains_key(&display_row) {
1348 (true, style.line_number_active)
1349 } else {
1350 (false, style.line_number)
1351 };
1352 if let Some(buffer_row) = row {
1353 if include_line_numbers {
1354 line_number.clear();
1355 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1356 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1357 &line_number,
1358 style.text.font_size,
1359 &[(
1360 line_number.len(),
1361 RunStyle {
1362 font_id: style.text.font_id,
1363 color,
1364 underline: Default::default(),
1365 },
1366 )],
1367 )));
1368 fold_statuses.push(
1369 is_singleton
1370 .then(|| {
1371 snapshot
1372 .fold_for_line(buffer_row)
1373 .map(|fold_status| (fold_status, buffer_row, active))
1374 })
1375 .flatten(),
1376 )
1377 }
1378 } else {
1379 fold_statuses.push(None);
1380 line_number_layouts.push(None);
1381 }
1382 }
1383
1384 (line_number_layouts, fold_statuses)
1385 }
1386
1387 fn layout_lines(
1388 &mut self,
1389 rows: Range<u32>,
1390 line_number_layouts: &[Option<Line>],
1391 snapshot: &EditorSnapshot,
1392 cx: &ViewContext<Editor>,
1393 ) -> Vec<LineWithInvisibles> {
1394 if rows.start >= rows.end {
1395 return Vec::new();
1396 }
1397
1398 // When the editor is empty and unfocused, then show the placeholder.
1399 if snapshot.is_empty() {
1400 let placeholder_style = self
1401 .style
1402 .placeholder_text
1403 .as_ref()
1404 .unwrap_or(&self.style.text);
1405 let placeholder_text = snapshot.placeholder_text();
1406 let placeholder_lines = placeholder_text
1407 .as_ref()
1408 .map_or("", AsRef::as_ref)
1409 .split('\n')
1410 .skip(rows.start as usize)
1411 .chain(iter::repeat(""))
1412 .take(rows.len());
1413 placeholder_lines
1414 .map(|line| {
1415 cx.text_layout_cache().layout_str(
1416 line,
1417 placeholder_style.font_size,
1418 &[(
1419 line.len(),
1420 RunStyle {
1421 font_id: placeholder_style.font_id,
1422 color: placeholder_style.color,
1423 underline: Default::default(),
1424 },
1425 )],
1426 )
1427 })
1428 .map(|line| LineWithInvisibles {
1429 line,
1430 invisibles: Vec::new(),
1431 })
1432 .collect()
1433 } else {
1434 let style = &self.style;
1435 let chunks = snapshot
1436 .chunks(
1437 rows.clone(),
1438 true,
1439 Some(style.theme.hint),
1440 Some(style.theme.suggestion),
1441 )
1442 .map(|chunk| {
1443 let mut highlight_style = chunk
1444 .syntax_highlight_id
1445 .and_then(|id| id.style(&style.syntax));
1446
1447 if let Some(chunk_highlight) = chunk.highlight_style {
1448 if let Some(highlight_style) = highlight_style.as_mut() {
1449 highlight_style.highlight(chunk_highlight);
1450 } else {
1451 highlight_style = Some(chunk_highlight);
1452 }
1453 }
1454
1455 let mut diagnostic_highlight = HighlightStyle::default();
1456
1457 if chunk.is_unnecessary {
1458 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1459 }
1460
1461 if let Some(severity) = chunk.diagnostic_severity {
1462 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1463 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1464 let diagnostic_style = super::diagnostic_style(severity, true, style);
1465 diagnostic_highlight.underline = Some(Underline {
1466 color: Some(diagnostic_style.message.text.color),
1467 thickness: 1.0.into(),
1468 squiggly: true,
1469 });
1470 }
1471 }
1472
1473 if let Some(highlight_style) = highlight_style.as_mut() {
1474 highlight_style.highlight(diagnostic_highlight);
1475 } else {
1476 highlight_style = Some(diagnostic_highlight);
1477 }
1478
1479 HighlightedChunk {
1480 chunk: chunk.text,
1481 style: highlight_style,
1482 is_tab: chunk.is_tab,
1483 }
1484 });
1485
1486 LineWithInvisibles::from_chunks(
1487 chunks,
1488 &style.text,
1489 cx.text_layout_cache(),
1490 cx.font_cache(),
1491 MAX_LINE_LEN,
1492 rows.len() as usize,
1493 line_number_layouts,
1494 snapshot.mode,
1495 )
1496 }
1497 }
1498
1499 #[allow(clippy::too_many_arguments)]
1500 fn layout_blocks(
1501 &mut self,
1502 rows: Range<u32>,
1503 snapshot: &EditorSnapshot,
1504 editor_width: f32,
1505 scroll_width: f32,
1506 gutter_padding: f32,
1507 gutter_width: f32,
1508 em_width: f32,
1509 text_x: f32,
1510 line_height: f32,
1511 style: &EditorStyle,
1512 line_layouts: &[LineWithInvisibles],
1513 editor: &mut Editor,
1514 cx: &mut LayoutContext<Editor>,
1515 ) -> (f32, Vec<BlockLayout>) {
1516 let mut block_id = 0;
1517 let scroll_x = snapshot.scroll_anchor.offset.x();
1518 let (fixed_blocks, non_fixed_blocks) = snapshot
1519 .blocks_in_range(rows.clone())
1520 .partition::<Vec<_>, _>(|(_, block)| match block {
1521 TransformBlock::ExcerptHeader { .. } => false,
1522 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1523 });
1524 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1525 let mut element = match block {
1526 TransformBlock::Custom(block) => {
1527 let align_to = block
1528 .position()
1529 .to_point(&snapshot.buffer_snapshot)
1530 .to_display_point(snapshot);
1531 let anchor_x = text_x
1532 + if rows.contains(&align_to.row()) {
1533 line_layouts[(align_to.row() - rows.start) as usize]
1534 .line
1535 .x_for_index(align_to.column() as usize)
1536 } else {
1537 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1538 .x_for_index(align_to.column() as usize)
1539 };
1540
1541 block.render(&mut BlockContext {
1542 view_context: cx,
1543 anchor_x,
1544 gutter_padding,
1545 line_height,
1546 scroll_x,
1547 gutter_width,
1548 em_width,
1549 block_id,
1550 })
1551 }
1552 TransformBlock::ExcerptHeader {
1553 id,
1554 buffer,
1555 range,
1556 starts_new_buffer,
1557 ..
1558 } => {
1559 let tooltip_style = theme::current(cx).tooltip.clone();
1560 let include_root = editor
1561 .project
1562 .as_ref()
1563 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1564 .unwrap_or_default();
1565 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1566 let jump_path = ProjectPath {
1567 worktree_id: file.worktree_id(cx),
1568 path: file.path.clone(),
1569 };
1570 let jump_anchor = range
1571 .primary
1572 .as_ref()
1573 .map_or(range.context.start, |primary| primary.start);
1574 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1575
1576 enum JumpIcon {}
1577 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1578 let style = style.jump_icon.style_for(state);
1579 Svg::new("icons/arrow_up_right_8.svg")
1580 .with_color(style.color)
1581 .constrained()
1582 .with_width(style.icon_width)
1583 .aligned()
1584 .contained()
1585 .with_style(style.container)
1586 .constrained()
1587 .with_width(style.button_width)
1588 .with_height(style.button_width)
1589 })
1590 .with_cursor_style(CursorStyle::PointingHand)
1591 .on_click(MouseButton::Left, move |_, editor, cx| {
1592 if let Some(workspace) = editor
1593 .workspace
1594 .as_ref()
1595 .and_then(|(workspace, _)| workspace.upgrade(cx))
1596 {
1597 workspace.update(cx, |workspace, cx| {
1598 Editor::jump(
1599 workspace,
1600 jump_path.clone(),
1601 jump_position,
1602 jump_anchor,
1603 cx,
1604 );
1605 });
1606 }
1607 })
1608 .with_tooltip::<JumpIcon>(
1609 (*id).into(),
1610 "Jump to Buffer".to_string(),
1611 Some(Box::new(crate::OpenExcerpts)),
1612 tooltip_style.clone(),
1613 cx,
1614 )
1615 .aligned()
1616 .flex_float()
1617 });
1618
1619 if *starts_new_buffer {
1620 let editor_font_size = style.text.font_size;
1621 let style = &style.diagnostic_path_header;
1622 let font_size = (style.text_scale_factor * editor_font_size).round();
1623
1624 let path = buffer.resolve_file_path(cx, include_root);
1625 let mut filename = None;
1626 let mut parent_path = None;
1627 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1628 if let Some(path) = path {
1629 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1630 parent_path =
1631 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1632 }
1633
1634 Flex::row()
1635 .with_child(
1636 Label::new(
1637 filename.unwrap_or_else(|| "untitled".to_string()),
1638 style.filename.text.clone().with_font_size(font_size),
1639 )
1640 .contained()
1641 .with_style(style.filename.container)
1642 .aligned(),
1643 )
1644 .with_children(parent_path.map(|path| {
1645 Label::new(path, style.path.text.clone().with_font_size(font_size))
1646 .contained()
1647 .with_style(style.path.container)
1648 .aligned()
1649 }))
1650 .with_children(jump_icon)
1651 .contained()
1652 .with_style(style.container)
1653 .with_padding_left(gutter_padding)
1654 .with_padding_right(gutter_padding)
1655 .expanded()
1656 .into_any_named("path header block")
1657 } else {
1658 let text_style = style.text.clone();
1659 Flex::row()
1660 .with_child(Label::new("⋯", text_style))
1661 .with_children(jump_icon)
1662 .contained()
1663 .with_padding_left(gutter_padding)
1664 .with_padding_right(gutter_padding)
1665 .expanded()
1666 .into_any_named("collapsed context")
1667 }
1668 }
1669 };
1670
1671 element.layout(
1672 SizeConstraint {
1673 min: Vector2F::zero(),
1674 max: vec2f(width, block.height() as f32 * line_height),
1675 },
1676 editor,
1677 cx,
1678 );
1679 element
1680 };
1681
1682 let mut fixed_block_max_width = 0f32;
1683 let mut blocks = Vec::new();
1684 for (row, block) in fixed_blocks {
1685 let element = render_block(block, f32::INFINITY, block_id);
1686 block_id += 1;
1687 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1688 blocks.push(BlockLayout {
1689 row,
1690 element,
1691 style: BlockStyle::Fixed,
1692 });
1693 }
1694 for (row, block) in non_fixed_blocks {
1695 let style = match block {
1696 TransformBlock::Custom(block) => block.style(),
1697 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1698 };
1699 let width = match style {
1700 BlockStyle::Sticky => editor_width,
1701 BlockStyle::Flex => editor_width
1702 .max(fixed_block_max_width)
1703 .max(gutter_width + scroll_width),
1704 BlockStyle::Fixed => unreachable!(),
1705 };
1706 let element = render_block(block, width, block_id);
1707 block_id += 1;
1708 blocks.push(BlockLayout {
1709 row,
1710 element,
1711 style,
1712 });
1713 }
1714 (
1715 scroll_width.max(fixed_block_max_width - gutter_width),
1716 blocks,
1717 )
1718 }
1719}
1720
1721struct HighlightedChunk<'a> {
1722 chunk: &'a str,
1723 style: Option<HighlightStyle>,
1724 is_tab: bool,
1725}
1726
1727#[derive(Debug)]
1728pub struct LineWithInvisibles {
1729 pub line: Line,
1730 invisibles: Vec<Invisible>,
1731}
1732
1733impl LineWithInvisibles {
1734 fn from_chunks<'a>(
1735 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1736 text_style: &TextStyle,
1737 text_layout_cache: &TextLayoutCache,
1738 font_cache: &Arc<FontCache>,
1739 max_line_len: usize,
1740 max_line_count: usize,
1741 line_number_layouts: &[Option<Line>],
1742 editor_mode: EditorMode,
1743 ) -> Vec<Self> {
1744 let mut layouts = Vec::with_capacity(max_line_count);
1745 let mut line = String::new();
1746 let mut invisibles = Vec::new();
1747 let mut styles = Vec::new();
1748 let mut non_whitespace_added = false;
1749 let mut row = 0;
1750 let mut line_exceeded_max_len = false;
1751 for highlighted_chunk in chunks.chain([HighlightedChunk {
1752 chunk: "\n",
1753 style: None,
1754 is_tab: false,
1755 }]) {
1756 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1757 if ix > 0 {
1758 layouts.push(Self {
1759 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1760 invisibles: invisibles.drain(..).collect(),
1761 });
1762
1763 line.clear();
1764 styles.clear();
1765 row += 1;
1766 line_exceeded_max_len = false;
1767 non_whitespace_added = false;
1768 if row == max_line_count {
1769 return layouts;
1770 }
1771 }
1772
1773 if !line_chunk.is_empty() && !line_exceeded_max_len {
1774 let text_style = if let Some(style) = highlighted_chunk.style {
1775 text_style
1776 .clone()
1777 .highlight(style, font_cache)
1778 .map(Cow::Owned)
1779 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1780 } else {
1781 Cow::Borrowed(text_style)
1782 };
1783
1784 if line.len() + line_chunk.len() > max_line_len {
1785 let mut chunk_len = max_line_len - line.len();
1786 while !line_chunk.is_char_boundary(chunk_len) {
1787 chunk_len -= 1;
1788 }
1789 line_chunk = &line_chunk[..chunk_len];
1790 line_exceeded_max_len = true;
1791 }
1792
1793 styles.push((
1794 line_chunk.len(),
1795 RunStyle {
1796 font_id: text_style.font_id,
1797 color: text_style.color,
1798 underline: text_style.underline,
1799 },
1800 ));
1801
1802 if editor_mode == EditorMode::Full {
1803 // Line wrap pads its contents with fake whitespaces,
1804 // avoid printing them
1805 let inside_wrapped_string = line_number_layouts
1806 .get(row)
1807 .and_then(|layout| layout.as_ref())
1808 .is_none();
1809 if highlighted_chunk.is_tab {
1810 if non_whitespace_added || !inside_wrapped_string {
1811 invisibles.push(Invisible::Tab {
1812 line_start_offset: line.len(),
1813 });
1814 }
1815 } else {
1816 invisibles.extend(
1817 line_chunk
1818 .chars()
1819 .enumerate()
1820 .filter(|(_, line_char)| {
1821 let is_whitespace = line_char.is_whitespace();
1822 non_whitespace_added |= !is_whitespace;
1823 is_whitespace
1824 && (non_whitespace_added || !inside_wrapped_string)
1825 })
1826 .map(|(whitespace_index, _)| Invisible::Whitespace {
1827 line_offset: line.len() + whitespace_index,
1828 }),
1829 )
1830 }
1831 }
1832
1833 line.push_str(line_chunk);
1834 }
1835 }
1836 }
1837
1838 layouts
1839 }
1840
1841 fn draw(
1842 &self,
1843 layout: &LayoutState,
1844 row: u32,
1845 scroll_top: f32,
1846 scene: &mut SceneBuilder,
1847 content_origin: Vector2F,
1848 scroll_left: f32,
1849 visible_text_bounds: RectF,
1850 whitespace_setting: ShowWhitespaceSetting,
1851 selection_ranges: &[Range<DisplayPoint>],
1852 visible_bounds: RectF,
1853 cx: &mut ViewContext<Editor>,
1854 ) {
1855 let line_height = layout.position_map.line_height;
1856 let line_y = row as f32 * line_height - scroll_top;
1857
1858 self.line.paint(
1859 scene,
1860 content_origin + vec2f(-scroll_left, line_y),
1861 visible_text_bounds,
1862 line_height,
1863 cx,
1864 );
1865
1866 self.draw_invisibles(
1867 &selection_ranges,
1868 layout,
1869 content_origin,
1870 scroll_left,
1871 line_y,
1872 row,
1873 scene,
1874 visible_bounds,
1875 line_height,
1876 whitespace_setting,
1877 cx,
1878 );
1879 }
1880
1881 fn draw_invisibles(
1882 &self,
1883 selection_ranges: &[Range<DisplayPoint>],
1884 layout: &LayoutState,
1885 content_origin: Vector2F,
1886 scroll_left: f32,
1887 line_y: f32,
1888 row: u32,
1889 scene: &mut SceneBuilder,
1890 visible_bounds: RectF,
1891 line_height: f32,
1892 whitespace_setting: ShowWhitespaceSetting,
1893 cx: &mut ViewContext<Editor>,
1894 ) {
1895 let allowed_invisibles_regions = match whitespace_setting {
1896 ShowWhitespaceSetting::None => return,
1897 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1898 ShowWhitespaceSetting::All => None,
1899 };
1900
1901 for invisible in &self.invisibles {
1902 let (&token_offset, invisible_symbol) = match invisible {
1903 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1904 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1905 };
1906
1907 let x_offset = self.line.x_for_index(token_offset);
1908 let invisible_offset =
1909 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1910 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1911
1912 if let Some(allowed_regions) = allowed_invisibles_regions {
1913 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1914 if !allowed_regions
1915 .iter()
1916 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1917 {
1918 continue;
1919 }
1920 }
1921 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1922 }
1923 }
1924}
1925
1926#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1927enum Invisible {
1928 Tab { line_start_offset: usize },
1929 Whitespace { line_offset: usize },
1930}
1931
1932impl Element<Editor> for EditorElement {
1933 type LayoutState = LayoutState;
1934 type PaintState = ();
1935
1936 fn layout(
1937 &mut self,
1938 constraint: SizeConstraint,
1939 editor: &mut Editor,
1940 cx: &mut LayoutContext<Editor>,
1941 ) -> (Vector2F, Self::LayoutState) {
1942 let mut size = constraint.max;
1943 if size.x().is_infinite() {
1944 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1945 }
1946
1947 let snapshot = editor.snapshot(cx);
1948 let style = self.style.clone();
1949 let line_height = style.text.line_height(cx.font_cache());
1950
1951 let gutter_padding;
1952 let gutter_width;
1953 let gutter_margin;
1954 if snapshot.show_gutter {
1955 let em_width = style.text.em_width(cx.font_cache());
1956 gutter_padding = (em_width * style.gutter_padding_factor).round();
1957 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1958 gutter_margin = -style.text.descent(cx.font_cache());
1959 } else {
1960 gutter_padding = 0.0;
1961 gutter_width = 0.0;
1962 gutter_margin = 0.0;
1963 };
1964
1965 let text_width = size.x() - gutter_width;
1966 let em_width = style.text.em_width(cx.font_cache());
1967 let em_advance = style.text.em_advance(cx.font_cache());
1968 let overscroll = vec2f(em_width, 0.);
1969 let snapshot = {
1970 editor.set_visible_line_count(size.y() / line_height, cx);
1971
1972 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1973 let wrap_width = match editor.soft_wrap_mode(cx) {
1974 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1975 SoftWrap::EditorWidth => editor_width,
1976 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1977 };
1978
1979 if editor.set_wrap_width(Some(wrap_width), cx) {
1980 editor.snapshot(cx)
1981 } else {
1982 snapshot
1983 }
1984 };
1985
1986 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1987 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1988 size.set_y(
1989 scroll_height
1990 .min(constraint.max_along(Axis::Vertical))
1991 .max(constraint.min_along(Axis::Vertical))
1992 .min(line_height * max_lines as f32),
1993 )
1994 } else if let EditorMode::SingleLine = snapshot.mode {
1995 size.set_y(
1996 line_height
1997 .min(constraint.max_along(Axis::Vertical))
1998 .max(constraint.min_along(Axis::Vertical)),
1999 )
2000 } else if size.y().is_infinite() {
2001 size.set_y(scroll_height);
2002 }
2003 let gutter_size = vec2f(gutter_width, size.y());
2004 let text_size = vec2f(text_width, size.y());
2005
2006 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2007 let mut snapshot = editor.snapshot(cx);
2008
2009 let scroll_position = snapshot.scroll_position();
2010 // The scroll position is a fractional point, the whole number of which represents
2011 // the top of the window in terms of display rows.
2012 let start_row = scroll_position.y() as u32;
2013 let height_in_lines = size.y() / line_height;
2014 let max_row = snapshot.max_point().row();
2015
2016 // Add 1 to ensure selections bleed off screen
2017 let end_row = 1 + cmp::min(
2018 (scroll_position.y() + height_in_lines).ceil() as u32,
2019 max_row,
2020 );
2021
2022 let start_anchor = if start_row == 0 {
2023 Anchor::min()
2024 } else {
2025 snapshot
2026 .buffer_snapshot
2027 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2028 };
2029 let end_anchor = if end_row > max_row {
2030 Anchor::max()
2031 } else {
2032 snapshot
2033 .buffer_snapshot
2034 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2035 };
2036
2037 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2038 let mut active_rows = BTreeMap::new();
2039 let mut fold_ranges = Vec::new();
2040 let is_singleton = editor.is_singleton(cx);
2041
2042 let highlighted_rows = editor.highlighted_rows();
2043 let theme = theme::current(cx);
2044 let highlighted_ranges = editor.background_highlights_in_range(
2045 start_anchor..end_anchor,
2046 &snapshot.display_snapshot,
2047 theme.as_ref(),
2048 );
2049
2050 fold_ranges.extend(
2051 snapshot
2052 .folds_in_range(start_anchor..end_anchor)
2053 .map(|anchor| {
2054 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2055 (
2056 start.row,
2057 start.to_display_point(&snapshot.display_snapshot)
2058 ..anchor.end.to_display_point(&snapshot),
2059 )
2060 }),
2061 );
2062
2063 let mut remote_selections = HashMap::default();
2064 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2065 .buffer_snapshot
2066 .remote_selections_in_range(&(start_anchor..end_anchor))
2067 {
2068 // The local selections match the leader's selections.
2069 if Some(replica_id) == editor.leader_replica_id {
2070 continue;
2071 }
2072 remote_selections
2073 .entry(replica_id)
2074 .or_insert(Vec::new())
2075 .push(SelectionLayout::new(
2076 selection,
2077 line_mode,
2078 cursor_shape,
2079 &snapshot.display_snapshot,
2080 ));
2081 }
2082 selections.extend(remote_selections);
2083
2084 if editor.show_local_selections {
2085 let mut local_selections = editor
2086 .selections
2087 .disjoint_in_range(start_anchor..end_anchor, cx);
2088 local_selections.extend(editor.selections.pending(cx));
2089 for selection in &local_selections {
2090 let is_empty = selection.start == selection.end;
2091 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2092 let selection_end = snapshot.next_line_boundary(selection.end).1;
2093 for row in cmp::max(selection_start.row(), start_row)
2094 ..=cmp::min(selection_end.row(), end_row)
2095 {
2096 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2097 *contains_non_empty_selection |= !is_empty;
2098 }
2099 }
2100
2101 // Render the local selections in the leader's color when following.
2102 let local_replica_id = editor
2103 .leader_replica_id
2104 .unwrap_or_else(|| editor.replica_id(cx));
2105
2106 selections.push((
2107 local_replica_id,
2108 local_selections
2109 .into_iter()
2110 .map(|selection| {
2111 SelectionLayout::new(
2112 selection,
2113 editor.selections.line_mode,
2114 editor.cursor_shape,
2115 &snapshot.display_snapshot,
2116 )
2117 })
2118 .collect(),
2119 ));
2120 }
2121
2122 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2123 let show_scrollbars = match scrollbar_settings.show {
2124 ShowScrollbar::Auto => {
2125 // Git
2126 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2127 // Scrollmanager
2128 || editor.scroll_manager.scrollbars_visible()
2129 }
2130 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2131 ShowScrollbar::Always => true,
2132 ShowScrollbar::Never => false,
2133 };
2134
2135 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2136 .into_iter()
2137 .map(|(id, fold)| {
2138 let color = self
2139 .style
2140 .folds
2141 .ellipses
2142 .background
2143 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2144 .color;
2145
2146 (id, fold, color)
2147 })
2148 .collect();
2149
2150 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2151 start_row..end_row,
2152 &active_rows,
2153 is_singleton,
2154 &snapshot,
2155 cx,
2156 );
2157
2158 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2159
2160 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2161
2162 let mut max_visible_line_width = 0.0;
2163 let line_layouts =
2164 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2165 for line_with_invisibles in &line_layouts {
2166 if line_with_invisibles.line.width() > max_visible_line_width {
2167 max_visible_line_width = line_with_invisibles.line.width();
2168 }
2169 }
2170
2171 let style = self.style.clone();
2172 let longest_line_width = layout_line(
2173 snapshot.longest_row(),
2174 &snapshot,
2175 &style,
2176 cx.text_layout_cache(),
2177 )
2178 .width();
2179 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2180 let em_width = style.text.em_width(cx.font_cache());
2181 let (scroll_width, blocks) = self.layout_blocks(
2182 start_row..end_row,
2183 &snapshot,
2184 size.x(),
2185 scroll_width,
2186 gutter_padding,
2187 gutter_width,
2188 em_width,
2189 gutter_width + gutter_margin,
2190 line_height,
2191 &style,
2192 &line_layouts,
2193 editor,
2194 cx,
2195 );
2196
2197 let scroll_max = vec2f(
2198 ((scroll_width - text_size.x()) / em_width).max(0.0),
2199 max_row as f32,
2200 );
2201
2202 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2203
2204 let autoscrolled = if autoscroll_horizontally {
2205 editor.autoscroll_horizontally(
2206 start_row,
2207 text_size.x(),
2208 scroll_width,
2209 em_width,
2210 &line_layouts,
2211 cx,
2212 )
2213 } else {
2214 false
2215 };
2216
2217 if clamped || autoscrolled {
2218 snapshot = editor.snapshot(cx);
2219 }
2220
2221 let newest_selection_head = editor
2222 .selections
2223 .newest::<usize>(cx)
2224 .head()
2225 .to_display_point(&snapshot);
2226 let style = editor.style(cx);
2227
2228 let mut context_menu = None;
2229 let mut code_actions_indicator = None;
2230 if (start_row..end_row).contains(&newest_selection_head.row()) {
2231 if editor.context_menu_visible() {
2232 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2233 }
2234
2235 let active = matches!(
2236 editor.context_menu,
2237 Some(crate::ContextMenu::CodeActions(_))
2238 );
2239
2240 code_actions_indicator = editor
2241 .render_code_actions_indicator(&style, active, cx)
2242 .map(|indicator| (newest_selection_head.row(), indicator));
2243 }
2244
2245 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2246 let mut hover = editor
2247 .hover_state
2248 .render(&snapshot, &style, visible_rows, cx);
2249 let mode = editor.mode;
2250
2251 let mut fold_indicators = editor.render_fold_indicators(
2252 fold_statuses,
2253 &style,
2254 editor.gutter_hovered,
2255 line_height,
2256 gutter_margin,
2257 cx,
2258 );
2259
2260 if let Some((_, context_menu)) = context_menu.as_mut() {
2261 context_menu.layout(
2262 SizeConstraint {
2263 min: Vector2F::zero(),
2264 max: vec2f(
2265 cx.window_size().x() * 0.7,
2266 (12. * line_height).min((size.y() - line_height) / 2.),
2267 ),
2268 },
2269 editor,
2270 cx,
2271 );
2272 }
2273
2274 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2275 indicator.layout(
2276 SizeConstraint::strict_along(
2277 Axis::Vertical,
2278 line_height * style.code_actions.vertical_scale,
2279 ),
2280 editor,
2281 cx,
2282 );
2283 }
2284
2285 for fold_indicator in fold_indicators.iter_mut() {
2286 if let Some(indicator) = fold_indicator.as_mut() {
2287 indicator.layout(
2288 SizeConstraint::strict_along(
2289 Axis::Vertical,
2290 line_height * style.code_actions.vertical_scale,
2291 ),
2292 editor,
2293 cx,
2294 );
2295 }
2296 }
2297
2298 if let Some((_, hover_popovers)) = hover.as_mut() {
2299 for hover_popover in hover_popovers.iter_mut() {
2300 hover_popover.layout(
2301 SizeConstraint {
2302 min: Vector2F::zero(),
2303 max: vec2f(
2304 (120. * em_width) // Default size
2305 .min(size.x() / 2.) // Shrink to half of the editor width
2306 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2307 (16. * line_height) // Default size
2308 .min(size.y() / 2.) // Shrink to half of the editor height
2309 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2310 ),
2311 },
2312 editor,
2313 cx,
2314 );
2315 }
2316 }
2317
2318 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2319 let invisible_symbol_style = RunStyle {
2320 color: self.style.whitespace,
2321 font_id: self.style.text.font_id,
2322 underline: Default::default(),
2323 };
2324
2325 (
2326 size,
2327 LayoutState {
2328 mode,
2329 position_map: Arc::new(PositionMap {
2330 size,
2331 scroll_max,
2332 line_layouts,
2333 line_height,
2334 em_width,
2335 em_advance,
2336 snapshot,
2337 }),
2338 visible_display_row_range: start_row..end_row,
2339 gutter_size,
2340 gutter_padding,
2341 text_size,
2342 scrollbar_row_range,
2343 show_scrollbars,
2344 is_singleton,
2345 max_row,
2346 gutter_margin,
2347 active_rows,
2348 highlighted_rows,
2349 highlighted_ranges,
2350 fold_ranges,
2351 line_number_layouts,
2352 display_hunks,
2353 blocks,
2354 selections,
2355 context_menu,
2356 code_actions_indicator,
2357 fold_indicators,
2358 tab_invisible: cx.text_layout_cache().layout_str(
2359 "→",
2360 invisible_symbol_font_size,
2361 &[("→".len(), invisible_symbol_style)],
2362 ),
2363 space_invisible: cx.text_layout_cache().layout_str(
2364 "•",
2365 invisible_symbol_font_size,
2366 &[("•".len(), invisible_symbol_style)],
2367 ),
2368 hover_popovers: hover,
2369 },
2370 )
2371 }
2372
2373 fn paint(
2374 &mut self,
2375 scene: &mut SceneBuilder,
2376 bounds: RectF,
2377 visible_bounds: RectF,
2378 layout: &mut Self::LayoutState,
2379 editor: &mut Editor,
2380 cx: &mut ViewContext<Editor>,
2381 ) -> Self::PaintState {
2382 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2383 scene.push_layer(Some(visible_bounds));
2384
2385 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2386 let text_bounds = RectF::new(
2387 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2388 layout.text_size,
2389 );
2390
2391 Self::attach_mouse_handlers(
2392 scene,
2393 &layout.position_map,
2394 layout.hover_popovers.is_some(),
2395 visible_bounds,
2396 text_bounds,
2397 gutter_bounds,
2398 bounds,
2399 cx,
2400 );
2401
2402 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2403 if layout.gutter_size.x() > 0. {
2404 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2405 }
2406 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2407
2408 scene.push_layer(Some(bounds));
2409 if !layout.blocks.is_empty() {
2410 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2411 }
2412 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2413 scene.pop_layer();
2414
2415 scene.pop_layer();
2416 }
2417
2418 fn rect_for_text_range(
2419 &self,
2420 range_utf16: Range<usize>,
2421 bounds: RectF,
2422 _: RectF,
2423 layout: &Self::LayoutState,
2424 _: &Self::PaintState,
2425 _: &Editor,
2426 _: &ViewContext<Editor>,
2427 ) -> Option<RectF> {
2428 let text_bounds = RectF::new(
2429 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2430 layout.text_size,
2431 );
2432 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2433 let scroll_position = layout.position_map.snapshot.scroll_position();
2434 let start_row = scroll_position.y() as u32;
2435 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2436 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2437
2438 let range_start = OffsetUtf16(range_utf16.start)
2439 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2440 if range_start.row() < start_row {
2441 return None;
2442 }
2443
2444 let line = &layout
2445 .position_map
2446 .line_layouts
2447 .get((range_start.row() - start_row) as usize)?
2448 .line;
2449 let range_start_x = line.x_for_index(range_start.column() as usize);
2450 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2451 Some(RectF::new(
2452 content_origin
2453 + vec2f(
2454 range_start_x,
2455 range_start_y + layout.position_map.line_height,
2456 )
2457 - vec2f(scroll_left, scroll_top),
2458 vec2f(
2459 layout.position_map.em_width,
2460 layout.position_map.line_height,
2461 ),
2462 ))
2463 }
2464
2465 fn debug(
2466 &self,
2467 bounds: RectF,
2468 _: &Self::LayoutState,
2469 _: &Self::PaintState,
2470 _: &Editor,
2471 _: &ViewContext<Editor>,
2472 ) -> json::Value {
2473 json!({
2474 "type": "BufferElement",
2475 "bounds": bounds.to_json()
2476 })
2477 }
2478}
2479
2480type BufferRow = u32;
2481
2482pub struct LayoutState {
2483 position_map: Arc<PositionMap>,
2484 gutter_size: Vector2F,
2485 gutter_padding: f32,
2486 gutter_margin: f32,
2487 text_size: Vector2F,
2488 mode: EditorMode,
2489 visible_display_row_range: Range<u32>,
2490 active_rows: BTreeMap<u32, bool>,
2491 highlighted_rows: Option<Range<u32>>,
2492 line_number_layouts: Vec<Option<text_layout::Line>>,
2493 display_hunks: Vec<DisplayDiffHunk>,
2494 blocks: Vec<BlockLayout>,
2495 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2496 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2497 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2498 scrollbar_row_range: Range<f32>,
2499 show_scrollbars: bool,
2500 is_singleton: bool,
2501 max_row: u32,
2502 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2503 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2504 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2505 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2506 tab_invisible: Line,
2507 space_invisible: Line,
2508}
2509
2510struct PositionMap {
2511 size: Vector2F,
2512 line_height: f32,
2513 scroll_max: Vector2F,
2514 em_width: f32,
2515 em_advance: f32,
2516 line_layouts: Vec<LineWithInvisibles>,
2517 snapshot: EditorSnapshot,
2518}
2519
2520impl PositionMap {
2521 /// Returns two display points:
2522 /// 1. The nearest *valid* position in the editor
2523 /// 2. An unclipped, potentially *invalid* position that maps directly to
2524 /// the given pixel position.
2525 fn point_for_position(
2526 &self,
2527 text_bounds: RectF,
2528 position: Vector2F,
2529 ) -> (DisplayPoint, DisplayPoint) {
2530 let scroll_position = self.snapshot.scroll_position();
2531 let position = position - text_bounds.origin();
2532 let y = position.y().max(0.0).min(self.size.y());
2533 let x = position.x() + (scroll_position.x() * self.em_width);
2534 let row = (y / self.line_height + scroll_position.y()) as u32;
2535 let (column, x_overshoot) = if let Some(line) = self
2536 .line_layouts
2537 .get(row as usize - scroll_position.y() as usize)
2538 .map(|line_with_spaces| &line_with_spaces.line)
2539 {
2540 if let Some(ix) = line.index_for_x(x) {
2541 (ix as u32, 0.0)
2542 } else {
2543 (line.len() as u32, 0f32.max(x - line.width()))
2544 }
2545 } else {
2546 (0, x)
2547 };
2548
2549 let mut target_point = DisplayPoint::new(row, column);
2550 let point = self.snapshot.clip_point(target_point, Bias::Left);
2551 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2552
2553 (point, target_point)
2554 }
2555}
2556
2557struct BlockLayout {
2558 row: u32,
2559 element: AnyElement<Editor>,
2560 style: BlockStyle,
2561}
2562
2563fn layout_line(
2564 row: u32,
2565 snapshot: &EditorSnapshot,
2566 style: &EditorStyle,
2567 layout_cache: &TextLayoutCache,
2568) -> text_layout::Line {
2569 let mut line = snapshot.line(row);
2570
2571 if line.len() > MAX_LINE_LEN {
2572 let mut len = MAX_LINE_LEN;
2573 while !line.is_char_boundary(len) {
2574 len -= 1;
2575 }
2576
2577 line.truncate(len);
2578 }
2579
2580 layout_cache.layout_str(
2581 &line,
2582 style.text.font_size,
2583 &[(
2584 snapshot.line_len(row) as usize,
2585 RunStyle {
2586 font_id: style.text.font_id,
2587 color: Color::black(),
2588 underline: Default::default(),
2589 },
2590 )],
2591 )
2592}
2593
2594#[derive(Debug)]
2595pub struct Cursor {
2596 origin: Vector2F,
2597 block_width: f32,
2598 line_height: f32,
2599 color: Color,
2600 shape: CursorShape,
2601 block_text: Option<Line>,
2602}
2603
2604impl Cursor {
2605 pub fn new(
2606 origin: Vector2F,
2607 block_width: f32,
2608 line_height: f32,
2609 color: Color,
2610 shape: CursorShape,
2611 block_text: Option<Line>,
2612 ) -> Cursor {
2613 Cursor {
2614 origin,
2615 block_width,
2616 line_height,
2617 color,
2618 shape,
2619 block_text,
2620 }
2621 }
2622
2623 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2624 RectF::new(
2625 self.origin + origin,
2626 vec2f(self.block_width, self.line_height),
2627 )
2628 }
2629
2630 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2631 let bounds = match self.shape {
2632 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2633 CursorShape::Block | CursorShape::Hollow => RectF::new(
2634 self.origin + origin,
2635 vec2f(self.block_width, self.line_height),
2636 ),
2637 CursorShape::Underscore => RectF::new(
2638 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2639 vec2f(self.block_width, 2.0),
2640 ),
2641 };
2642
2643 //Draw background or border quad
2644 if matches!(self.shape, CursorShape::Hollow) {
2645 scene.push_quad(Quad {
2646 bounds,
2647 background: None,
2648 border: Border::all(1., self.color),
2649 corner_radius: 0.,
2650 });
2651 } else {
2652 scene.push_quad(Quad {
2653 bounds,
2654 background: Some(self.color),
2655 border: Default::default(),
2656 corner_radius: 0.,
2657 });
2658 }
2659
2660 if let Some(block_text) = &self.block_text {
2661 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2662 }
2663 }
2664
2665 pub fn shape(&self) -> CursorShape {
2666 self.shape
2667 }
2668}
2669
2670#[derive(Debug)]
2671pub struct HighlightedRange {
2672 pub start_y: f32,
2673 pub line_height: f32,
2674 pub lines: Vec<HighlightedRangeLine>,
2675 pub color: Color,
2676 pub corner_radius: f32,
2677}
2678
2679#[derive(Debug)]
2680pub struct HighlightedRangeLine {
2681 pub start_x: f32,
2682 pub end_x: f32,
2683}
2684
2685impl HighlightedRange {
2686 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2687 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2688 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2689 self.paint_lines(
2690 self.start_y + self.line_height,
2691 &self.lines[1..],
2692 bounds,
2693 scene,
2694 );
2695 } else {
2696 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2697 }
2698 }
2699
2700 fn paint_lines(
2701 &self,
2702 start_y: f32,
2703 lines: &[HighlightedRangeLine],
2704 bounds: RectF,
2705 scene: &mut SceneBuilder,
2706 ) {
2707 if lines.is_empty() {
2708 return;
2709 }
2710
2711 let mut path = PathBuilder::new();
2712 let first_line = lines.first().unwrap();
2713 let last_line = lines.last().unwrap();
2714
2715 let first_top_left = vec2f(first_line.start_x, start_y);
2716 let first_top_right = vec2f(first_line.end_x, start_y);
2717
2718 let curve_height = vec2f(0., self.corner_radius);
2719 let curve_width = |start_x: f32, end_x: f32| {
2720 let max = (end_x - start_x) / 2.;
2721 let width = if max < self.corner_radius {
2722 max
2723 } else {
2724 self.corner_radius
2725 };
2726
2727 vec2f(width, 0.)
2728 };
2729
2730 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2731 path.reset(first_top_right - top_curve_width);
2732 path.curve_to(first_top_right + curve_height, first_top_right);
2733
2734 let mut iter = lines.iter().enumerate().peekable();
2735 while let Some((ix, line)) = iter.next() {
2736 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2737
2738 if let Some((_, next_line)) = iter.peek() {
2739 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2740
2741 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2742 Ordering::Equal => {
2743 path.line_to(bottom_right);
2744 }
2745 Ordering::Less => {
2746 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2747 path.line_to(bottom_right - curve_height);
2748 if self.corner_radius > 0. {
2749 path.curve_to(bottom_right - curve_width, bottom_right);
2750 }
2751 path.line_to(next_top_right + curve_width);
2752 if self.corner_radius > 0. {
2753 path.curve_to(next_top_right + curve_height, next_top_right);
2754 }
2755 }
2756 Ordering::Greater => {
2757 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2758 path.line_to(bottom_right - curve_height);
2759 if self.corner_radius > 0. {
2760 path.curve_to(bottom_right + curve_width, bottom_right);
2761 }
2762 path.line_to(next_top_right - curve_width);
2763 if self.corner_radius > 0. {
2764 path.curve_to(next_top_right + curve_height, next_top_right);
2765 }
2766 }
2767 }
2768 } else {
2769 let curve_width = curve_width(line.start_x, line.end_x);
2770 path.line_to(bottom_right - curve_height);
2771 if self.corner_radius > 0. {
2772 path.curve_to(bottom_right - curve_width, bottom_right);
2773 }
2774
2775 let bottom_left = vec2f(line.start_x, bottom_right.y());
2776 path.line_to(bottom_left + curve_width);
2777 if self.corner_radius > 0. {
2778 path.curve_to(bottom_left - curve_height, bottom_left);
2779 }
2780 }
2781 }
2782
2783 if first_line.start_x > last_line.start_x {
2784 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2785 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2786 path.line_to(second_top_left + curve_height);
2787 if self.corner_radius > 0. {
2788 path.curve_to(second_top_left + curve_width, second_top_left);
2789 }
2790 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2791 path.line_to(first_bottom_left - curve_width);
2792 if self.corner_radius > 0. {
2793 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2794 }
2795 }
2796
2797 path.line_to(first_top_left + curve_height);
2798 if self.corner_radius > 0. {
2799 path.curve_to(first_top_left + top_curve_width, first_top_left);
2800 }
2801 path.line_to(first_top_right - top_curve_width);
2802
2803 scene.push_path(path.build(self.color, Some(bounds)));
2804 }
2805}
2806
2807fn position_to_display_point(
2808 position: Vector2F,
2809 text_bounds: RectF,
2810 position_map: &PositionMap,
2811) -> Option<DisplayPoint> {
2812 if text_bounds.contains_point(position) {
2813 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2814 if point == target_point {
2815 Some(point)
2816 } else {
2817 None
2818 }
2819 } else {
2820 None
2821 }
2822}
2823
2824fn range_to_bounds(
2825 range: &Range<DisplayPoint>,
2826 content_origin: Vector2F,
2827 scroll_left: f32,
2828 scroll_top: f32,
2829 visible_row_range: &Range<u32>,
2830 line_end_overshoot: f32,
2831 position_map: &PositionMap,
2832) -> impl Iterator<Item = RectF> {
2833 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2834
2835 if range.start == range.end {
2836 return bounds.into_iter();
2837 }
2838
2839 let start_row = visible_row_range.start;
2840 let end_row = visible_row_range.end;
2841
2842 let row_range = if range.end.column() == 0 {
2843 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2844 } else {
2845 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2846 };
2847
2848 let first_y =
2849 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2850
2851 for (idx, row) in row_range.enumerate() {
2852 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2853
2854 let start_x = if row == range.start.row() {
2855 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2856 - scroll_left
2857 } else {
2858 content_origin.x() - scroll_left
2859 };
2860
2861 let end_x = if row == range.end.row() {
2862 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2863 } else {
2864 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2865 };
2866
2867 bounds.push(RectF::from_points(
2868 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2869 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2870 ))
2871 }
2872
2873 bounds.into_iter()
2874}
2875
2876pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2877 delta.powf(1.5) / 100.0
2878}
2879
2880fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2881 delta.powf(1.2) / 300.0
2882}
2883
2884#[cfg(test)]
2885mod tests {
2886 use super::*;
2887 use crate::{
2888 display_map::{BlockDisposition, BlockProperties},
2889 editor_tests::{init_test, update_test_settings},
2890 Editor, MultiBuffer,
2891 };
2892 use gpui::TestAppContext;
2893 use language::language_settings;
2894 use log::info;
2895 use std::{num::NonZeroU32, sync::Arc};
2896 use util::test::sample_text;
2897
2898 #[gpui::test]
2899 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2900 init_test(cx, |_| {});
2901
2902 let (_, editor) = cx.add_window(|cx| {
2903 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2904 Editor::new(EditorMode::Full, buffer, None, None, cx)
2905 });
2906 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2907
2908 let layouts = editor.update(cx, |editor, cx| {
2909 let snapshot = editor.snapshot(cx);
2910 element
2911 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2912 .0
2913 });
2914 assert_eq!(layouts.len(), 6);
2915 }
2916
2917 #[gpui::test]
2918 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2919 init_test(cx, |_| {});
2920
2921 let (_, editor) = cx.add_window(|cx| {
2922 let buffer = MultiBuffer::build_simple("", cx);
2923 Editor::new(EditorMode::Full, buffer, None, None, cx)
2924 });
2925
2926 editor.update(cx, |editor, cx| {
2927 editor.set_placeholder_text("hello", cx);
2928 editor.insert_blocks(
2929 [BlockProperties {
2930 style: BlockStyle::Fixed,
2931 disposition: BlockDisposition::Above,
2932 height: 3,
2933 position: Anchor::min(),
2934 render: Arc::new(|_| Empty::new().into_any()),
2935 }],
2936 None,
2937 cx,
2938 );
2939
2940 // Blur the editor so that it displays placeholder text.
2941 cx.blur();
2942 });
2943
2944 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2945 let (size, mut state) = editor.update(cx, |editor, cx| {
2946 let mut new_parents = Default::default();
2947 let mut notify_views_if_parents_change = Default::default();
2948 let mut layout_cx = LayoutContext::new(
2949 cx,
2950 &mut new_parents,
2951 &mut notify_views_if_parents_change,
2952 false,
2953 );
2954 element.layout(
2955 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2956 editor,
2957 &mut layout_cx,
2958 )
2959 });
2960
2961 assert_eq!(state.position_map.line_layouts.len(), 4);
2962 assert_eq!(
2963 state
2964 .line_number_layouts
2965 .iter()
2966 .map(Option::is_some)
2967 .collect::<Vec<_>>(),
2968 &[false, false, false, true]
2969 );
2970
2971 // Don't panic.
2972 let mut scene = SceneBuilder::new(1.0);
2973 let bounds = RectF::new(Default::default(), size);
2974 editor.update(cx, |editor, cx| {
2975 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2976 });
2977 }
2978
2979 #[gpui::test]
2980 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
2981 const TAB_SIZE: u32 = 4;
2982
2983 let input_text = "\t \t|\t| a b";
2984 let expected_invisibles = vec![
2985 Invisible::Tab {
2986 line_start_offset: 0,
2987 },
2988 Invisible::Whitespace {
2989 line_offset: TAB_SIZE as usize,
2990 },
2991 Invisible::Tab {
2992 line_start_offset: TAB_SIZE as usize + 1,
2993 },
2994 Invisible::Tab {
2995 line_start_offset: TAB_SIZE as usize * 2 + 1,
2996 },
2997 Invisible::Whitespace {
2998 line_offset: TAB_SIZE as usize * 3 + 1,
2999 },
3000 Invisible::Whitespace {
3001 line_offset: TAB_SIZE as usize * 3 + 3,
3002 },
3003 ];
3004 assert_eq!(
3005 expected_invisibles.len(),
3006 input_text
3007 .chars()
3008 .filter(|initial_char| initial_char.is_whitespace())
3009 .count(),
3010 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3011 );
3012
3013 init_test(cx, |s| {
3014 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3015 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3016 });
3017
3018 let actual_invisibles =
3019 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3020
3021 assert_eq!(expected_invisibles, actual_invisibles);
3022 }
3023
3024 #[gpui::test]
3025 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3026 init_test(cx, |s| {
3027 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3028 s.defaults.tab_size = NonZeroU32::new(4);
3029 });
3030
3031 for editor_mode_without_invisibles in [
3032 EditorMode::SingleLine,
3033 EditorMode::AutoHeight { max_lines: 100 },
3034 ] {
3035 let invisibles = collect_invisibles_from_new_editor(
3036 cx,
3037 editor_mode_without_invisibles,
3038 "\t\t\t| | a b",
3039 500.0,
3040 );
3041 assert!(invisibles.is_empty(),
3042 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3043 }
3044 }
3045
3046 #[gpui::test]
3047 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3048 let tab_size = 4;
3049 let input_text = "a\tbcd ".repeat(9);
3050 let repeated_invisibles = [
3051 Invisible::Tab {
3052 line_start_offset: 1,
3053 },
3054 Invisible::Whitespace {
3055 line_offset: tab_size as usize + 3,
3056 },
3057 Invisible::Whitespace {
3058 line_offset: tab_size as usize + 4,
3059 },
3060 Invisible::Whitespace {
3061 line_offset: tab_size as usize + 5,
3062 },
3063 ];
3064 let expected_invisibles = std::iter::once(repeated_invisibles)
3065 .cycle()
3066 .take(9)
3067 .flatten()
3068 .collect::<Vec<_>>();
3069 assert_eq!(
3070 expected_invisibles.len(),
3071 input_text
3072 .chars()
3073 .filter(|initial_char| initial_char.is_whitespace())
3074 .count(),
3075 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3076 );
3077 info!("Expected invisibles: {expected_invisibles:?}");
3078
3079 init_test(cx, |_| {});
3080
3081 // Put the same string with repeating whitespace pattern into editors of various size,
3082 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3083 let resize_step = 10.0;
3084 let mut editor_width = 200.0;
3085 while editor_width <= 1000.0 {
3086 update_test_settings(cx, |s| {
3087 s.defaults.tab_size = NonZeroU32::new(tab_size);
3088 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3089 s.defaults.preferred_line_length = Some(editor_width as u32);
3090 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3091 });
3092
3093 let actual_invisibles =
3094 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3095
3096 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3097 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3098 let mut i = 0;
3099 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3100 i = actual_index;
3101 match expected_invisibles.get(i) {
3102 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3103 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3104 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3105 _ => {
3106 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3107 }
3108 },
3109 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3110 }
3111 }
3112 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3113 assert!(
3114 missing_expected_invisibles.is_empty(),
3115 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3116 );
3117
3118 editor_width += resize_step;
3119 }
3120 }
3121
3122 fn collect_invisibles_from_new_editor(
3123 cx: &mut TestAppContext,
3124 editor_mode: EditorMode,
3125 input_text: &str,
3126 editor_width: f32,
3127 ) -> Vec<Invisible> {
3128 info!(
3129 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3130 );
3131 let (_, editor) = cx.add_window(|cx| {
3132 let buffer = MultiBuffer::build_simple(&input_text, cx);
3133 Editor::new(editor_mode, buffer, None, None, cx)
3134 });
3135
3136 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3137 let (_, layout_state) = editor.update(cx, |editor, cx| {
3138 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3139 editor.set_wrap_width(Some(editor_width), cx);
3140
3141 let mut new_parents = Default::default();
3142 let mut notify_views_if_parents_change = Default::default();
3143 let mut layout_cx = LayoutContext::new(
3144 cx,
3145 &mut new_parents,
3146 &mut notify_views_if_parents_change,
3147 false,
3148 );
3149 element.layout(
3150 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3151 editor,
3152 &mut layout_cx,
3153 )
3154 });
3155
3156 layout_state
3157 .position_map
3158 .line_layouts
3159 .iter()
3160 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3161 .flatten()
3162 .cloned()
3163 .collect()
3164 }
3165}