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(rows.clone(), true, Some(style.theme.suggestion))
1437 .map(|chunk| {
1438 let mut highlight_style = chunk
1439 .syntax_highlight_id
1440 .and_then(|id| id.style(&style.syntax));
1441
1442 if let Some(chunk_highlight) = chunk.highlight_style {
1443 if let Some(highlight_style) = highlight_style.as_mut() {
1444 highlight_style.highlight(chunk_highlight);
1445 } else {
1446 highlight_style = Some(chunk_highlight);
1447 }
1448 }
1449
1450 let mut diagnostic_highlight = HighlightStyle::default();
1451
1452 if chunk.is_unnecessary {
1453 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1454 }
1455
1456 if let Some(severity) = chunk.diagnostic_severity {
1457 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1458 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1459 let diagnostic_style = super::diagnostic_style(severity, true, style);
1460 diagnostic_highlight.underline = Some(Underline {
1461 color: Some(diagnostic_style.message.text.color),
1462 thickness: 1.0.into(),
1463 squiggly: true,
1464 });
1465 }
1466 }
1467
1468 if let Some(highlight_style) = highlight_style.as_mut() {
1469 highlight_style.highlight(diagnostic_highlight);
1470 } else {
1471 highlight_style = Some(diagnostic_highlight);
1472 }
1473
1474 HighlightedChunk {
1475 chunk: chunk.text,
1476 style: highlight_style,
1477 is_tab: chunk.is_tab,
1478 }
1479 });
1480
1481 LineWithInvisibles::from_chunks(
1482 chunks,
1483 &style.text,
1484 cx.text_layout_cache(),
1485 cx.font_cache(),
1486 MAX_LINE_LEN,
1487 rows.len() as usize,
1488 line_number_layouts,
1489 snapshot.mode,
1490 )
1491 }
1492 }
1493
1494 #[allow(clippy::too_many_arguments)]
1495 fn layout_blocks(
1496 &mut self,
1497 rows: Range<u32>,
1498 snapshot: &EditorSnapshot,
1499 editor_width: f32,
1500 scroll_width: f32,
1501 gutter_padding: f32,
1502 gutter_width: f32,
1503 em_width: f32,
1504 text_x: f32,
1505 line_height: f32,
1506 style: &EditorStyle,
1507 line_layouts: &[LineWithInvisibles],
1508 editor: &mut Editor,
1509 cx: &mut LayoutContext<Editor>,
1510 ) -> (f32, Vec<BlockLayout>) {
1511 let scroll_x = snapshot.scroll_anchor.offset.x();
1512 let (fixed_blocks, non_fixed_blocks) = snapshot
1513 .blocks_in_range(rows.clone())
1514 .partition::<Vec<_>, _>(|(_, block)| match block {
1515 TransformBlock::ExcerptHeader { .. } => false,
1516 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1517 });
1518 let mut render_block = |block: &TransformBlock, width: f32| {
1519 let mut element = match block {
1520 TransformBlock::Custom(block) => {
1521 let align_to = block
1522 .position()
1523 .to_point(&snapshot.buffer_snapshot)
1524 .to_display_point(snapshot);
1525 let anchor_x = text_x
1526 + if rows.contains(&align_to.row()) {
1527 line_layouts[(align_to.row() - rows.start) as usize]
1528 .line
1529 .x_for_index(align_to.column() as usize)
1530 } else {
1531 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1532 .x_for_index(align_to.column() as usize)
1533 };
1534
1535 block.render(&mut BlockContext {
1536 view_context: cx,
1537 anchor_x,
1538 gutter_padding,
1539 line_height,
1540 scroll_x,
1541 gutter_width,
1542 em_width,
1543 })
1544 }
1545 TransformBlock::ExcerptHeader {
1546 id,
1547 buffer,
1548 range,
1549 starts_new_buffer,
1550 ..
1551 } => {
1552 let tooltip_style = theme::current(cx).tooltip.clone();
1553 let include_root = editor
1554 .project
1555 .as_ref()
1556 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1557 .unwrap_or_default();
1558 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1559 let jump_path = ProjectPath {
1560 worktree_id: file.worktree_id(cx),
1561 path: file.path.clone(),
1562 };
1563 let jump_anchor = range
1564 .primary
1565 .as_ref()
1566 .map_or(range.context.start, |primary| primary.start);
1567 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1568
1569 enum JumpIcon {}
1570 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1571 let style = style.jump_icon.style_for(state, false);
1572 Svg::new("icons/arrow_up_right_8.svg")
1573 .with_color(style.color)
1574 .constrained()
1575 .with_width(style.icon_width)
1576 .aligned()
1577 .contained()
1578 .with_style(style.container)
1579 .constrained()
1580 .with_width(style.button_width)
1581 .with_height(style.button_width)
1582 })
1583 .with_cursor_style(CursorStyle::PointingHand)
1584 .on_click(MouseButton::Left, move |_, editor, cx| {
1585 if let Some(workspace) = editor
1586 .workspace
1587 .as_ref()
1588 .and_then(|(workspace, _)| workspace.upgrade(cx))
1589 {
1590 workspace.update(cx, |workspace, cx| {
1591 Editor::jump(
1592 workspace,
1593 jump_path.clone(),
1594 jump_position,
1595 jump_anchor,
1596 cx,
1597 );
1598 });
1599 }
1600 })
1601 .with_tooltip::<JumpIcon>(
1602 (*id).into(),
1603 "Jump to Buffer".to_string(),
1604 Some(Box::new(crate::OpenExcerpts)),
1605 tooltip_style.clone(),
1606 cx,
1607 )
1608 .aligned()
1609 .flex_float()
1610 });
1611
1612 if *starts_new_buffer {
1613 let editor_font_size = style.text.font_size;
1614 let style = &style.diagnostic_path_header;
1615 let font_size = (style.text_scale_factor * editor_font_size).round();
1616
1617 let path = buffer.resolve_file_path(cx, include_root);
1618 let mut filename = None;
1619 let mut parent_path = None;
1620 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1621 if let Some(path) = path {
1622 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1623 parent_path =
1624 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1625 }
1626
1627 Flex::row()
1628 .with_child(
1629 Label::new(
1630 filename.unwrap_or_else(|| "untitled".to_string()),
1631 style.filename.text.clone().with_font_size(font_size),
1632 )
1633 .contained()
1634 .with_style(style.filename.container)
1635 .aligned(),
1636 )
1637 .with_children(parent_path.map(|path| {
1638 Label::new(path, style.path.text.clone().with_font_size(font_size))
1639 .contained()
1640 .with_style(style.path.container)
1641 .aligned()
1642 }))
1643 .with_children(jump_icon)
1644 .contained()
1645 .with_style(style.container)
1646 .with_padding_left(gutter_padding)
1647 .with_padding_right(gutter_padding)
1648 .expanded()
1649 .into_any_named("path header block")
1650 } else {
1651 let text_style = style.text.clone();
1652 Flex::row()
1653 .with_child(Label::new("⋯", text_style))
1654 .with_children(jump_icon)
1655 .contained()
1656 .with_padding_left(gutter_padding)
1657 .with_padding_right(gutter_padding)
1658 .expanded()
1659 .into_any_named("collapsed context")
1660 }
1661 }
1662 };
1663
1664 element.layout(
1665 SizeConstraint {
1666 min: Vector2F::zero(),
1667 max: vec2f(width, block.height() as f32 * line_height),
1668 },
1669 editor,
1670 cx,
1671 );
1672 element
1673 };
1674
1675 let mut fixed_block_max_width = 0f32;
1676 let mut blocks = Vec::new();
1677 for (row, block) in fixed_blocks {
1678 let element = render_block(block, f32::INFINITY);
1679 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1680 blocks.push(BlockLayout {
1681 row,
1682 element,
1683 style: BlockStyle::Fixed,
1684 });
1685 }
1686 for (row, block) in non_fixed_blocks {
1687 let style = match block {
1688 TransformBlock::Custom(block) => block.style(),
1689 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1690 };
1691 let width = match style {
1692 BlockStyle::Sticky => editor_width,
1693 BlockStyle::Flex => editor_width
1694 .max(fixed_block_max_width)
1695 .max(gutter_width + scroll_width),
1696 BlockStyle::Fixed => unreachable!(),
1697 };
1698 let element = render_block(block, width);
1699 blocks.push(BlockLayout {
1700 row,
1701 element,
1702 style,
1703 });
1704 }
1705 (
1706 scroll_width.max(fixed_block_max_width - gutter_width),
1707 blocks,
1708 )
1709 }
1710}
1711
1712struct HighlightedChunk<'a> {
1713 chunk: &'a str,
1714 style: Option<HighlightStyle>,
1715 is_tab: bool,
1716}
1717
1718#[derive(Debug)]
1719pub struct LineWithInvisibles {
1720 pub line: Line,
1721 invisibles: Vec<Invisible>,
1722}
1723
1724impl LineWithInvisibles {
1725 fn from_chunks<'a>(
1726 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1727 text_style: &TextStyle,
1728 text_layout_cache: &TextLayoutCache,
1729 font_cache: &Arc<FontCache>,
1730 max_line_len: usize,
1731 max_line_count: usize,
1732 line_number_layouts: &[Option<Line>],
1733 editor_mode: EditorMode,
1734 ) -> Vec<Self> {
1735 let mut layouts = Vec::with_capacity(max_line_count);
1736 let mut line = String::new();
1737 let mut invisibles = Vec::new();
1738 let mut styles = Vec::new();
1739 let mut non_whitespace_added = false;
1740 let mut row = 0;
1741 let mut line_exceeded_max_len = false;
1742 for highlighted_chunk in chunks.chain([HighlightedChunk {
1743 chunk: "\n",
1744 style: None,
1745 is_tab: false,
1746 }]) {
1747 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1748 if ix > 0 {
1749 layouts.push(Self {
1750 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1751 invisibles: invisibles.drain(..).collect(),
1752 });
1753
1754 line.clear();
1755 styles.clear();
1756 row += 1;
1757 line_exceeded_max_len = false;
1758 non_whitespace_added = false;
1759 if row == max_line_count {
1760 return layouts;
1761 }
1762 }
1763
1764 if !line_chunk.is_empty() && !line_exceeded_max_len {
1765 let text_style = if let Some(style) = highlighted_chunk.style {
1766 text_style
1767 .clone()
1768 .highlight(style, font_cache)
1769 .map(Cow::Owned)
1770 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1771 } else {
1772 Cow::Borrowed(text_style)
1773 };
1774
1775 if line.len() + line_chunk.len() > max_line_len {
1776 let mut chunk_len = max_line_len - line.len();
1777 while !line_chunk.is_char_boundary(chunk_len) {
1778 chunk_len -= 1;
1779 }
1780 line_chunk = &line_chunk[..chunk_len];
1781 line_exceeded_max_len = true;
1782 }
1783
1784 styles.push((
1785 line_chunk.len(),
1786 RunStyle {
1787 font_id: text_style.font_id,
1788 color: text_style.color,
1789 underline: text_style.underline,
1790 },
1791 ));
1792
1793 if editor_mode == EditorMode::Full {
1794 // Line wrap pads its contents with fake whitespaces,
1795 // avoid printing them
1796 let inside_wrapped_string = line_number_layouts
1797 .get(row)
1798 .and_then(|layout| layout.as_ref())
1799 .is_none();
1800 if highlighted_chunk.is_tab {
1801 if non_whitespace_added || !inside_wrapped_string {
1802 invisibles.push(Invisible::Tab {
1803 line_start_offset: line.len(),
1804 });
1805 }
1806 } else {
1807 invisibles.extend(
1808 line_chunk
1809 .chars()
1810 .enumerate()
1811 .filter(|(_, line_char)| {
1812 let is_whitespace = line_char.is_whitespace();
1813 non_whitespace_added |= !is_whitespace;
1814 is_whitespace
1815 && (non_whitespace_added || !inside_wrapped_string)
1816 })
1817 .map(|(whitespace_index, _)| Invisible::Whitespace {
1818 line_offset: line.len() + whitespace_index,
1819 }),
1820 )
1821 }
1822 }
1823
1824 line.push_str(line_chunk);
1825 }
1826 }
1827 }
1828
1829 layouts
1830 }
1831
1832 fn draw(
1833 &self,
1834 layout: &LayoutState,
1835 row: u32,
1836 scroll_top: f32,
1837 scene: &mut SceneBuilder,
1838 content_origin: Vector2F,
1839 scroll_left: f32,
1840 visible_text_bounds: RectF,
1841 whitespace_setting: ShowWhitespaceSetting,
1842 selection_ranges: &[Range<DisplayPoint>],
1843 visible_bounds: RectF,
1844 cx: &mut ViewContext<Editor>,
1845 ) {
1846 let line_height = layout.position_map.line_height;
1847 let line_y = row as f32 * line_height - scroll_top;
1848
1849 self.line.paint(
1850 scene,
1851 content_origin + vec2f(-scroll_left, line_y),
1852 visible_text_bounds,
1853 line_height,
1854 cx,
1855 );
1856
1857 self.draw_invisibles(
1858 &selection_ranges,
1859 layout,
1860 content_origin,
1861 scroll_left,
1862 line_y,
1863 row,
1864 scene,
1865 visible_bounds,
1866 line_height,
1867 whitespace_setting,
1868 cx,
1869 );
1870 }
1871
1872 fn draw_invisibles(
1873 &self,
1874 selection_ranges: &[Range<DisplayPoint>],
1875 layout: &LayoutState,
1876 content_origin: Vector2F,
1877 scroll_left: f32,
1878 line_y: f32,
1879 row: u32,
1880 scene: &mut SceneBuilder,
1881 visible_bounds: RectF,
1882 line_height: f32,
1883 whitespace_setting: ShowWhitespaceSetting,
1884 cx: &mut ViewContext<Editor>,
1885 ) {
1886 let allowed_invisibles_regions = match whitespace_setting {
1887 ShowWhitespaceSetting::None => return,
1888 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1889 ShowWhitespaceSetting::All => None,
1890 };
1891
1892 for invisible in &self.invisibles {
1893 let (&token_offset, invisible_symbol) = match invisible {
1894 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1895 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1896 };
1897
1898 let x_offset = self.line.x_for_index(token_offset);
1899 let invisible_offset =
1900 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1901 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1902
1903 if let Some(allowed_regions) = allowed_invisibles_regions {
1904 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1905 if !allowed_regions
1906 .iter()
1907 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1908 {
1909 continue;
1910 }
1911 }
1912 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1913 }
1914 }
1915}
1916
1917#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1918enum Invisible {
1919 Tab { line_start_offset: usize },
1920 Whitespace { line_offset: usize },
1921}
1922
1923impl Element<Editor> for EditorElement {
1924 type LayoutState = LayoutState;
1925 type PaintState = ();
1926
1927 fn layout(
1928 &mut self,
1929 constraint: SizeConstraint,
1930 editor: &mut Editor,
1931 cx: &mut LayoutContext<Editor>,
1932 ) -> (Vector2F, Self::LayoutState) {
1933 let mut size = constraint.max;
1934 if size.x().is_infinite() {
1935 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1936 }
1937
1938 let snapshot = editor.snapshot(cx);
1939 let style = self.style.clone();
1940 let line_height = style.text.line_height(cx.font_cache());
1941
1942 let gutter_padding;
1943 let gutter_width;
1944 let gutter_margin;
1945 if snapshot.show_gutter {
1946 let em_width = style.text.em_width(cx.font_cache());
1947 gutter_padding = (em_width * style.gutter_padding_factor).round();
1948 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1949 gutter_margin = -style.text.descent(cx.font_cache());
1950 } else {
1951 gutter_padding = 0.0;
1952 gutter_width = 0.0;
1953 gutter_margin = 0.0;
1954 };
1955
1956 let text_width = size.x() - gutter_width;
1957 let em_width = style.text.em_width(cx.font_cache());
1958 let em_advance = style.text.em_advance(cx.font_cache());
1959 let overscroll = vec2f(em_width, 0.);
1960 let snapshot = {
1961 editor.set_visible_line_count(size.y() / line_height);
1962
1963 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1964 let wrap_width = match editor.soft_wrap_mode(cx) {
1965 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1966 SoftWrap::EditorWidth => editor_width,
1967 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1968 };
1969
1970 if editor.set_wrap_width(Some(wrap_width), cx) {
1971 editor.snapshot(cx)
1972 } else {
1973 snapshot
1974 }
1975 };
1976
1977 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1978 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1979 size.set_y(
1980 scroll_height
1981 .min(constraint.max_along(Axis::Vertical))
1982 .max(constraint.min_along(Axis::Vertical))
1983 .min(line_height * max_lines as f32),
1984 )
1985 } else if let EditorMode::SingleLine = snapshot.mode {
1986 size.set_y(
1987 line_height
1988 .min(constraint.max_along(Axis::Vertical))
1989 .max(constraint.min_along(Axis::Vertical)),
1990 )
1991 } else if size.y().is_infinite() {
1992 size.set_y(scroll_height);
1993 }
1994 let gutter_size = vec2f(gutter_width, size.y());
1995 let text_size = vec2f(text_width, size.y());
1996
1997 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1998 let mut snapshot = editor.snapshot(cx);
1999
2000 let scroll_position = snapshot.scroll_position();
2001 // The scroll position is a fractional point, the whole number of which represents
2002 // the top of the window in terms of display rows.
2003 let start_row = scroll_position.y() as u32;
2004 let height_in_lines = size.y() / line_height;
2005 let max_row = snapshot.max_point().row();
2006
2007 // Add 1 to ensure selections bleed off screen
2008 let end_row = 1 + cmp::min(
2009 (scroll_position.y() + height_in_lines).ceil() as u32,
2010 max_row,
2011 );
2012
2013 let start_anchor = if start_row == 0 {
2014 Anchor::min()
2015 } else {
2016 snapshot
2017 .buffer_snapshot
2018 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2019 };
2020 let end_anchor = if end_row > max_row {
2021 Anchor::max()
2022 } else {
2023 snapshot
2024 .buffer_snapshot
2025 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2026 };
2027
2028 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2029 let mut active_rows = BTreeMap::new();
2030 let mut fold_ranges = Vec::new();
2031 let is_singleton = editor.is_singleton(cx);
2032
2033 let highlighted_rows = editor.highlighted_rows();
2034 let theme = theme::current(cx);
2035 let highlighted_ranges = editor.background_highlights_in_range(
2036 start_anchor..end_anchor,
2037 &snapshot.display_snapshot,
2038 theme.as_ref(),
2039 );
2040
2041 fold_ranges.extend(
2042 snapshot
2043 .folds_in_range(start_anchor..end_anchor)
2044 .map(|anchor| {
2045 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2046 (
2047 start.row,
2048 start.to_display_point(&snapshot.display_snapshot)
2049 ..anchor.end.to_display_point(&snapshot),
2050 )
2051 }),
2052 );
2053
2054 let mut remote_selections = HashMap::default();
2055 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2056 .buffer_snapshot
2057 .remote_selections_in_range(&(start_anchor..end_anchor))
2058 {
2059 // The local selections match the leader's selections.
2060 if Some(replica_id) == editor.leader_replica_id {
2061 continue;
2062 }
2063 remote_selections
2064 .entry(replica_id)
2065 .or_insert(Vec::new())
2066 .push(SelectionLayout::new(
2067 selection,
2068 line_mode,
2069 cursor_shape,
2070 &snapshot.display_snapshot,
2071 ));
2072 }
2073 selections.extend(remote_selections);
2074
2075 if editor.show_local_selections {
2076 let mut local_selections = editor
2077 .selections
2078 .disjoint_in_range(start_anchor..end_anchor, cx);
2079 local_selections.extend(editor.selections.pending(cx));
2080 for selection in &local_selections {
2081 let is_empty = selection.start == selection.end;
2082 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2083 let selection_end = snapshot.next_line_boundary(selection.end).1;
2084 for row in cmp::max(selection_start.row(), start_row)
2085 ..=cmp::min(selection_end.row(), end_row)
2086 {
2087 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2088 *contains_non_empty_selection |= !is_empty;
2089 }
2090 }
2091
2092 // Render the local selections in the leader's color when following.
2093 let local_replica_id = editor
2094 .leader_replica_id
2095 .unwrap_or_else(|| editor.replica_id(cx));
2096
2097 selections.push((
2098 local_replica_id,
2099 local_selections
2100 .into_iter()
2101 .map(|selection| {
2102 SelectionLayout::new(
2103 selection,
2104 editor.selections.line_mode,
2105 editor.cursor_shape,
2106 &snapshot.display_snapshot,
2107 )
2108 })
2109 .collect(),
2110 ));
2111 }
2112
2113 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2114 let show_scrollbars = match scrollbar_settings.show {
2115 ShowScrollbar::Auto => {
2116 // Git
2117 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2118 // Scrollmanager
2119 || editor.scroll_manager.scrollbars_visible()
2120 }
2121 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2122 ShowScrollbar::Always => true,
2123 ShowScrollbar::Never => false,
2124 };
2125
2126 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2127 .into_iter()
2128 .map(|(id, fold)| {
2129 let color = self
2130 .style
2131 .folds
2132 .ellipses
2133 .background
2134 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
2135 .color;
2136
2137 (id, fold, color)
2138 })
2139 .collect();
2140
2141 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2142 start_row..end_row,
2143 &active_rows,
2144 is_singleton,
2145 &snapshot,
2146 cx,
2147 );
2148
2149 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2150
2151 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2152
2153 let mut max_visible_line_width = 0.0;
2154 let line_layouts =
2155 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2156 for line_with_invisibles in &line_layouts {
2157 if line_with_invisibles.line.width() > max_visible_line_width {
2158 max_visible_line_width = line_with_invisibles.line.width();
2159 }
2160 }
2161
2162 let style = self.style.clone();
2163 let longest_line_width = layout_line(
2164 snapshot.longest_row(),
2165 &snapshot,
2166 &style,
2167 cx.text_layout_cache(),
2168 )
2169 .width();
2170 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2171 let em_width = style.text.em_width(cx.font_cache());
2172 let (scroll_width, blocks) = self.layout_blocks(
2173 start_row..end_row,
2174 &snapshot,
2175 size.x(),
2176 scroll_width,
2177 gutter_padding,
2178 gutter_width,
2179 em_width,
2180 gutter_width + gutter_margin,
2181 line_height,
2182 &style,
2183 &line_layouts,
2184 editor,
2185 cx,
2186 );
2187
2188 let scroll_max = vec2f(
2189 ((scroll_width - text_size.x()) / em_width).max(0.0),
2190 max_row as f32,
2191 );
2192
2193 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2194
2195 let autoscrolled = if autoscroll_horizontally {
2196 editor.autoscroll_horizontally(
2197 start_row,
2198 text_size.x(),
2199 scroll_width,
2200 em_width,
2201 &line_layouts,
2202 cx,
2203 )
2204 } else {
2205 false
2206 };
2207
2208 if clamped || autoscrolled {
2209 snapshot = editor.snapshot(cx);
2210 }
2211
2212 let newest_selection_head = editor
2213 .selections
2214 .newest::<usize>(cx)
2215 .head()
2216 .to_display_point(&snapshot);
2217 let style = editor.style(cx);
2218
2219 let mut context_menu = None;
2220 let mut code_actions_indicator = None;
2221 if (start_row..end_row).contains(&newest_selection_head.row()) {
2222 if editor.context_menu_visible() {
2223 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2224 }
2225
2226 let active = matches!(
2227 editor.context_menu,
2228 Some(crate::ContextMenu::CodeActions(_))
2229 );
2230
2231 code_actions_indicator = editor
2232 .render_code_actions_indicator(&style, active, cx)
2233 .map(|indicator| (newest_selection_head.row(), indicator));
2234 }
2235
2236 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2237 let mut hover = editor
2238 .hover_state
2239 .render(&snapshot, &style, visible_rows, cx);
2240 let mode = editor.mode;
2241
2242 let mut fold_indicators = editor.render_fold_indicators(
2243 fold_statuses,
2244 &style,
2245 editor.gutter_hovered,
2246 line_height,
2247 gutter_margin,
2248 cx,
2249 );
2250
2251 if let Some((_, context_menu)) = context_menu.as_mut() {
2252 context_menu.layout(
2253 SizeConstraint {
2254 min: Vector2F::zero(),
2255 max: vec2f(
2256 cx.window_size().x() * 0.7,
2257 (12. * line_height).min((size.y() - line_height) / 2.),
2258 ),
2259 },
2260 editor,
2261 cx,
2262 );
2263 }
2264
2265 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2266 indicator.layout(
2267 SizeConstraint::strict_along(
2268 Axis::Vertical,
2269 line_height * style.code_actions.vertical_scale,
2270 ),
2271 editor,
2272 cx,
2273 );
2274 }
2275
2276 for fold_indicator in fold_indicators.iter_mut() {
2277 if let Some(indicator) = fold_indicator.as_mut() {
2278 indicator.layout(
2279 SizeConstraint::strict_along(
2280 Axis::Vertical,
2281 line_height * style.code_actions.vertical_scale,
2282 ),
2283 editor,
2284 cx,
2285 );
2286 }
2287 }
2288
2289 if let Some((_, hover_popovers)) = hover.as_mut() {
2290 for hover_popover in hover_popovers.iter_mut() {
2291 hover_popover.layout(
2292 SizeConstraint {
2293 min: Vector2F::zero(),
2294 max: vec2f(
2295 (120. * em_width) // Default size
2296 .min(size.x() / 2.) // Shrink to half of the editor width
2297 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2298 (16. * line_height) // Default size
2299 .min(size.y() / 2.) // Shrink to half of the editor height
2300 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2301 ),
2302 },
2303 editor,
2304 cx,
2305 );
2306 }
2307 }
2308
2309 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2310 let invisible_symbol_style = RunStyle {
2311 color: self.style.whitespace,
2312 font_id: self.style.text.font_id,
2313 underline: Default::default(),
2314 };
2315
2316 (
2317 size,
2318 LayoutState {
2319 mode,
2320 position_map: Arc::new(PositionMap {
2321 size,
2322 scroll_max,
2323 line_layouts,
2324 line_height,
2325 em_width,
2326 em_advance,
2327 snapshot,
2328 }),
2329 visible_display_row_range: start_row..end_row,
2330 gutter_size,
2331 gutter_padding,
2332 text_size,
2333 scrollbar_row_range,
2334 show_scrollbars,
2335 is_singleton,
2336 max_row,
2337 gutter_margin,
2338 active_rows,
2339 highlighted_rows,
2340 highlighted_ranges,
2341 fold_ranges,
2342 line_number_layouts,
2343 display_hunks,
2344 blocks,
2345 selections,
2346 context_menu,
2347 code_actions_indicator,
2348 fold_indicators,
2349 tab_invisible: cx.text_layout_cache().layout_str(
2350 "→",
2351 invisible_symbol_font_size,
2352 &[("→".len(), invisible_symbol_style)],
2353 ),
2354 space_invisible: cx.text_layout_cache().layout_str(
2355 "•",
2356 invisible_symbol_font_size,
2357 &[("•".len(), invisible_symbol_style)],
2358 ),
2359 hover_popovers: hover,
2360 },
2361 )
2362 }
2363
2364 fn paint(
2365 &mut self,
2366 scene: &mut SceneBuilder,
2367 bounds: RectF,
2368 visible_bounds: RectF,
2369 layout: &mut Self::LayoutState,
2370 editor: &mut Editor,
2371 cx: &mut ViewContext<Editor>,
2372 ) -> Self::PaintState {
2373 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2374 scene.push_layer(Some(visible_bounds));
2375
2376 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2377 let text_bounds = RectF::new(
2378 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2379 layout.text_size,
2380 );
2381
2382 Self::attach_mouse_handlers(
2383 scene,
2384 &layout.position_map,
2385 layout.hover_popovers.is_some(),
2386 visible_bounds,
2387 text_bounds,
2388 gutter_bounds,
2389 bounds,
2390 cx,
2391 );
2392
2393 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2394 if layout.gutter_size.x() > 0. {
2395 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2396 }
2397 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2398
2399 scene.push_layer(Some(bounds));
2400 if !layout.blocks.is_empty() {
2401 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2402 }
2403 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2404 scene.pop_layer();
2405
2406 scene.pop_layer();
2407 }
2408
2409 fn rect_for_text_range(
2410 &self,
2411 range_utf16: Range<usize>,
2412 bounds: RectF,
2413 _: RectF,
2414 layout: &Self::LayoutState,
2415 _: &Self::PaintState,
2416 _: &Editor,
2417 _: &ViewContext<Editor>,
2418 ) -> Option<RectF> {
2419 let text_bounds = RectF::new(
2420 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2421 layout.text_size,
2422 );
2423 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2424 let scroll_position = layout.position_map.snapshot.scroll_position();
2425 let start_row = scroll_position.y() as u32;
2426 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2427 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2428
2429 let range_start = OffsetUtf16(range_utf16.start)
2430 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2431 if range_start.row() < start_row {
2432 return None;
2433 }
2434
2435 let line = &layout
2436 .position_map
2437 .line_layouts
2438 .get((range_start.row() - start_row) as usize)?
2439 .line;
2440 let range_start_x = line.x_for_index(range_start.column() as usize);
2441 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2442 Some(RectF::new(
2443 content_origin
2444 + vec2f(
2445 range_start_x,
2446 range_start_y + layout.position_map.line_height,
2447 )
2448 - vec2f(scroll_left, scroll_top),
2449 vec2f(
2450 layout.position_map.em_width,
2451 layout.position_map.line_height,
2452 ),
2453 ))
2454 }
2455
2456 fn debug(
2457 &self,
2458 bounds: RectF,
2459 _: &Self::LayoutState,
2460 _: &Self::PaintState,
2461 _: &Editor,
2462 _: &ViewContext<Editor>,
2463 ) -> json::Value {
2464 json!({
2465 "type": "BufferElement",
2466 "bounds": bounds.to_json()
2467 })
2468 }
2469}
2470
2471type BufferRow = u32;
2472
2473pub struct LayoutState {
2474 position_map: Arc<PositionMap>,
2475 gutter_size: Vector2F,
2476 gutter_padding: f32,
2477 gutter_margin: f32,
2478 text_size: Vector2F,
2479 mode: EditorMode,
2480 visible_display_row_range: Range<u32>,
2481 active_rows: BTreeMap<u32, bool>,
2482 highlighted_rows: Option<Range<u32>>,
2483 line_number_layouts: Vec<Option<text_layout::Line>>,
2484 display_hunks: Vec<DisplayDiffHunk>,
2485 blocks: Vec<BlockLayout>,
2486 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2487 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2488 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2489 scrollbar_row_range: Range<f32>,
2490 show_scrollbars: bool,
2491 is_singleton: bool,
2492 max_row: u32,
2493 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2494 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2495 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2496 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2497 tab_invisible: Line,
2498 space_invisible: Line,
2499}
2500
2501struct PositionMap {
2502 size: Vector2F,
2503 line_height: f32,
2504 scroll_max: Vector2F,
2505 em_width: f32,
2506 em_advance: f32,
2507 line_layouts: Vec<LineWithInvisibles>,
2508 snapshot: EditorSnapshot,
2509}
2510
2511impl PositionMap {
2512 /// Returns two display points:
2513 /// 1. The nearest *valid* position in the editor
2514 /// 2. An unclipped, potentially *invalid* position that maps directly to
2515 /// the given pixel position.
2516 fn point_for_position(
2517 &self,
2518 text_bounds: RectF,
2519 position: Vector2F,
2520 ) -> (DisplayPoint, DisplayPoint) {
2521 let scroll_position = self.snapshot.scroll_position();
2522 let position = position - text_bounds.origin();
2523 let y = position.y().max(0.0).min(self.size.y());
2524 let x = position.x() + (scroll_position.x() * self.em_width);
2525 let row = (y / self.line_height + scroll_position.y()) as u32;
2526 let (column, x_overshoot) = if let Some(line) = self
2527 .line_layouts
2528 .get(row as usize - scroll_position.y() as usize)
2529 .map(|line_with_spaces| &line_with_spaces.line)
2530 {
2531 if let Some(ix) = line.index_for_x(x) {
2532 (ix as u32, 0.0)
2533 } else {
2534 (line.len() as u32, 0f32.max(x - line.width()))
2535 }
2536 } else {
2537 (0, x)
2538 };
2539
2540 let mut target_point = DisplayPoint::new(row, column);
2541 let point = self.snapshot.clip_point(target_point, Bias::Left);
2542 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2543
2544 (point, target_point)
2545 }
2546}
2547
2548struct BlockLayout {
2549 row: u32,
2550 element: AnyElement<Editor>,
2551 style: BlockStyle,
2552}
2553
2554fn layout_line(
2555 row: u32,
2556 snapshot: &EditorSnapshot,
2557 style: &EditorStyle,
2558 layout_cache: &TextLayoutCache,
2559) -> text_layout::Line {
2560 let mut line = snapshot.line(row);
2561
2562 if line.len() > MAX_LINE_LEN {
2563 let mut len = MAX_LINE_LEN;
2564 while !line.is_char_boundary(len) {
2565 len -= 1;
2566 }
2567
2568 line.truncate(len);
2569 }
2570
2571 layout_cache.layout_str(
2572 &line,
2573 style.text.font_size,
2574 &[(
2575 snapshot.line_len(row) as usize,
2576 RunStyle {
2577 font_id: style.text.font_id,
2578 color: Color::black(),
2579 underline: Default::default(),
2580 },
2581 )],
2582 )
2583}
2584
2585#[derive(Debug)]
2586pub struct Cursor {
2587 origin: Vector2F,
2588 block_width: f32,
2589 line_height: f32,
2590 color: Color,
2591 shape: CursorShape,
2592 block_text: Option<Line>,
2593}
2594
2595impl Cursor {
2596 pub fn new(
2597 origin: Vector2F,
2598 block_width: f32,
2599 line_height: f32,
2600 color: Color,
2601 shape: CursorShape,
2602 block_text: Option<Line>,
2603 ) -> Cursor {
2604 Cursor {
2605 origin,
2606 block_width,
2607 line_height,
2608 color,
2609 shape,
2610 block_text,
2611 }
2612 }
2613
2614 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2615 RectF::new(
2616 self.origin + origin,
2617 vec2f(self.block_width, self.line_height),
2618 )
2619 }
2620
2621 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2622 let bounds = match self.shape {
2623 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2624 CursorShape::Block | CursorShape::Hollow => RectF::new(
2625 self.origin + origin,
2626 vec2f(self.block_width, self.line_height),
2627 ),
2628 CursorShape::Underscore => RectF::new(
2629 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2630 vec2f(self.block_width, 2.0),
2631 ),
2632 };
2633
2634 //Draw background or border quad
2635 if matches!(self.shape, CursorShape::Hollow) {
2636 scene.push_quad(Quad {
2637 bounds,
2638 background: None,
2639 border: Border::all(1., self.color),
2640 corner_radius: 0.,
2641 });
2642 } else {
2643 scene.push_quad(Quad {
2644 bounds,
2645 background: Some(self.color),
2646 border: Default::default(),
2647 corner_radius: 0.,
2648 });
2649 }
2650
2651 if let Some(block_text) = &self.block_text {
2652 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2653 }
2654 }
2655
2656 pub fn shape(&self) -> CursorShape {
2657 self.shape
2658 }
2659}
2660
2661#[derive(Debug)]
2662pub struct HighlightedRange {
2663 pub start_y: f32,
2664 pub line_height: f32,
2665 pub lines: Vec<HighlightedRangeLine>,
2666 pub color: Color,
2667 pub corner_radius: f32,
2668}
2669
2670#[derive(Debug)]
2671pub struct HighlightedRangeLine {
2672 pub start_x: f32,
2673 pub end_x: f32,
2674}
2675
2676impl HighlightedRange {
2677 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2678 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2679 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2680 self.paint_lines(
2681 self.start_y + self.line_height,
2682 &self.lines[1..],
2683 bounds,
2684 scene,
2685 );
2686 } else {
2687 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2688 }
2689 }
2690
2691 fn paint_lines(
2692 &self,
2693 start_y: f32,
2694 lines: &[HighlightedRangeLine],
2695 bounds: RectF,
2696 scene: &mut SceneBuilder,
2697 ) {
2698 if lines.is_empty() {
2699 return;
2700 }
2701
2702 let mut path = PathBuilder::new();
2703 let first_line = lines.first().unwrap();
2704 let last_line = lines.last().unwrap();
2705
2706 let first_top_left = vec2f(first_line.start_x, start_y);
2707 let first_top_right = vec2f(first_line.end_x, start_y);
2708
2709 let curve_height = vec2f(0., self.corner_radius);
2710 let curve_width = |start_x: f32, end_x: f32| {
2711 let max = (end_x - start_x) / 2.;
2712 let width = if max < self.corner_radius {
2713 max
2714 } else {
2715 self.corner_radius
2716 };
2717
2718 vec2f(width, 0.)
2719 };
2720
2721 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2722 path.reset(first_top_right - top_curve_width);
2723 path.curve_to(first_top_right + curve_height, first_top_right);
2724
2725 let mut iter = lines.iter().enumerate().peekable();
2726 while let Some((ix, line)) = iter.next() {
2727 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2728
2729 if let Some((_, next_line)) = iter.peek() {
2730 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2731
2732 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2733 Ordering::Equal => {
2734 path.line_to(bottom_right);
2735 }
2736 Ordering::Less => {
2737 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2738 path.line_to(bottom_right - curve_height);
2739 if self.corner_radius > 0. {
2740 path.curve_to(bottom_right - curve_width, bottom_right);
2741 }
2742 path.line_to(next_top_right + curve_width);
2743 if self.corner_radius > 0. {
2744 path.curve_to(next_top_right + curve_height, next_top_right);
2745 }
2746 }
2747 Ordering::Greater => {
2748 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2749 path.line_to(bottom_right - curve_height);
2750 if self.corner_radius > 0. {
2751 path.curve_to(bottom_right + curve_width, bottom_right);
2752 }
2753 path.line_to(next_top_right - curve_width);
2754 if self.corner_radius > 0. {
2755 path.curve_to(next_top_right + curve_height, next_top_right);
2756 }
2757 }
2758 }
2759 } else {
2760 let curve_width = curve_width(line.start_x, line.end_x);
2761 path.line_to(bottom_right - curve_height);
2762 if self.corner_radius > 0. {
2763 path.curve_to(bottom_right - curve_width, bottom_right);
2764 }
2765
2766 let bottom_left = vec2f(line.start_x, bottom_right.y());
2767 path.line_to(bottom_left + curve_width);
2768 if self.corner_radius > 0. {
2769 path.curve_to(bottom_left - curve_height, bottom_left);
2770 }
2771 }
2772 }
2773
2774 if first_line.start_x > last_line.start_x {
2775 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2776 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2777 path.line_to(second_top_left + curve_height);
2778 if self.corner_radius > 0. {
2779 path.curve_to(second_top_left + curve_width, second_top_left);
2780 }
2781 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2782 path.line_to(first_bottom_left - curve_width);
2783 if self.corner_radius > 0. {
2784 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2785 }
2786 }
2787
2788 path.line_to(first_top_left + curve_height);
2789 if self.corner_radius > 0. {
2790 path.curve_to(first_top_left + top_curve_width, first_top_left);
2791 }
2792 path.line_to(first_top_right - top_curve_width);
2793
2794 scene.push_path(path.build(self.color, Some(bounds)));
2795 }
2796}
2797
2798fn position_to_display_point(
2799 position: Vector2F,
2800 text_bounds: RectF,
2801 position_map: &PositionMap,
2802) -> Option<DisplayPoint> {
2803 if text_bounds.contains_point(position) {
2804 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2805 if point == target_point {
2806 Some(point)
2807 } else {
2808 None
2809 }
2810 } else {
2811 None
2812 }
2813}
2814
2815fn range_to_bounds(
2816 range: &Range<DisplayPoint>,
2817 content_origin: Vector2F,
2818 scroll_left: f32,
2819 scroll_top: f32,
2820 visible_row_range: &Range<u32>,
2821 line_end_overshoot: f32,
2822 position_map: &PositionMap,
2823) -> impl Iterator<Item = RectF> {
2824 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2825
2826 if range.start == range.end {
2827 return bounds.into_iter();
2828 }
2829
2830 let start_row = visible_row_range.start;
2831 let end_row = visible_row_range.end;
2832
2833 let row_range = if range.end.column() == 0 {
2834 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2835 } else {
2836 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2837 };
2838
2839 let first_y =
2840 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2841
2842 for (idx, row) in row_range.enumerate() {
2843 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2844
2845 let start_x = if row == range.start.row() {
2846 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2847 - scroll_left
2848 } else {
2849 content_origin.x() - scroll_left
2850 };
2851
2852 let end_x = if row == range.end.row() {
2853 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2854 } else {
2855 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2856 };
2857
2858 bounds.push(RectF::from_points(
2859 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2860 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2861 ))
2862 }
2863
2864 bounds.into_iter()
2865}
2866
2867pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2868 delta.powf(1.5) / 100.0
2869}
2870
2871fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2872 delta.powf(1.2) / 300.0
2873}
2874
2875#[cfg(test)]
2876mod tests {
2877 use super::*;
2878 use crate::{
2879 display_map::{BlockDisposition, BlockProperties},
2880 editor_tests::{init_test, update_test_settings},
2881 Editor, MultiBuffer,
2882 };
2883 use gpui::TestAppContext;
2884 use language::language_settings;
2885 use log::info;
2886 use std::{num::NonZeroU32, sync::Arc};
2887 use util::test::sample_text;
2888
2889 #[gpui::test]
2890 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2891 init_test(cx, |_| {});
2892
2893 let (_, editor) = cx.add_window(|cx| {
2894 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2895 Editor::new(EditorMode::Full, buffer, None, None, cx)
2896 });
2897 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2898
2899 let layouts = editor.update(cx, |editor, cx| {
2900 let snapshot = editor.snapshot(cx);
2901 element
2902 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2903 .0
2904 });
2905 assert_eq!(layouts.len(), 6);
2906 }
2907
2908 #[gpui::test]
2909 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2910 init_test(cx, |_| {});
2911
2912 let (_, editor) = cx.add_window(|cx| {
2913 let buffer = MultiBuffer::build_simple("", cx);
2914 Editor::new(EditorMode::Full, buffer, None, None, cx)
2915 });
2916
2917 editor.update(cx, |editor, cx| {
2918 editor.set_placeholder_text("hello", cx);
2919 editor.insert_blocks(
2920 [BlockProperties {
2921 style: BlockStyle::Fixed,
2922 disposition: BlockDisposition::Above,
2923 height: 3,
2924 position: Anchor::min(),
2925 render: Arc::new(|_| Empty::new().into_any()),
2926 }],
2927 None,
2928 cx,
2929 );
2930
2931 // Blur the editor so that it displays placeholder text.
2932 cx.blur();
2933 });
2934
2935 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2936 let (size, mut state) = editor.update(cx, |editor, cx| {
2937 let mut new_parents = Default::default();
2938 let mut notify_views_if_parents_change = Default::default();
2939 let mut layout_cx = LayoutContext::new(
2940 cx,
2941 &mut new_parents,
2942 &mut notify_views_if_parents_change,
2943 false,
2944 );
2945 element.layout(
2946 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2947 editor,
2948 &mut layout_cx,
2949 )
2950 });
2951
2952 assert_eq!(state.position_map.line_layouts.len(), 4);
2953 assert_eq!(
2954 state
2955 .line_number_layouts
2956 .iter()
2957 .map(Option::is_some)
2958 .collect::<Vec<_>>(),
2959 &[false, false, false, true]
2960 );
2961
2962 // Don't panic.
2963 let mut scene = SceneBuilder::new(1.0);
2964 let bounds = RectF::new(Default::default(), size);
2965 editor.update(cx, |editor, cx| {
2966 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2967 });
2968 }
2969
2970 #[gpui::test]
2971 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
2972 const TAB_SIZE: u32 = 4;
2973
2974 let input_text = "\t \t|\t| a b";
2975 let expected_invisibles = vec![
2976 Invisible::Tab {
2977 line_start_offset: 0,
2978 },
2979 Invisible::Whitespace {
2980 line_offset: TAB_SIZE as usize,
2981 },
2982 Invisible::Tab {
2983 line_start_offset: TAB_SIZE as usize + 1,
2984 },
2985 Invisible::Tab {
2986 line_start_offset: TAB_SIZE as usize * 2 + 1,
2987 },
2988 Invisible::Whitespace {
2989 line_offset: TAB_SIZE as usize * 3 + 1,
2990 },
2991 Invisible::Whitespace {
2992 line_offset: TAB_SIZE as usize * 3 + 3,
2993 },
2994 ];
2995 assert_eq!(
2996 expected_invisibles.len(),
2997 input_text
2998 .chars()
2999 .filter(|initial_char| initial_char.is_whitespace())
3000 .count(),
3001 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3002 );
3003
3004 init_test(cx, |s| {
3005 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3006 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3007 });
3008
3009 let actual_invisibles =
3010 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3011
3012 assert_eq!(expected_invisibles, actual_invisibles);
3013 }
3014
3015 #[gpui::test]
3016 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3017 init_test(cx, |s| {
3018 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3019 s.defaults.tab_size = NonZeroU32::new(4);
3020 });
3021
3022 for editor_mode_without_invisibles in [
3023 EditorMode::SingleLine,
3024 EditorMode::AutoHeight { max_lines: 100 },
3025 ] {
3026 let invisibles = collect_invisibles_from_new_editor(
3027 cx,
3028 editor_mode_without_invisibles,
3029 "\t\t\t| | a b",
3030 500.0,
3031 );
3032 assert!(invisibles.is_empty(),
3033 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3034 }
3035 }
3036
3037 #[gpui::test]
3038 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3039 let tab_size = 4;
3040 let input_text = "a\tbcd ".repeat(9);
3041 let repeated_invisibles = [
3042 Invisible::Tab {
3043 line_start_offset: 1,
3044 },
3045 Invisible::Whitespace {
3046 line_offset: tab_size as usize + 3,
3047 },
3048 Invisible::Whitespace {
3049 line_offset: tab_size as usize + 4,
3050 },
3051 Invisible::Whitespace {
3052 line_offset: tab_size as usize + 5,
3053 },
3054 ];
3055 let expected_invisibles = std::iter::once(repeated_invisibles)
3056 .cycle()
3057 .take(9)
3058 .flatten()
3059 .collect::<Vec<_>>();
3060 assert_eq!(
3061 expected_invisibles.len(),
3062 input_text
3063 .chars()
3064 .filter(|initial_char| initial_char.is_whitespace())
3065 .count(),
3066 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3067 );
3068 info!("Expected invisibles: {expected_invisibles:?}");
3069
3070 init_test(cx, |_| {});
3071
3072 // Put the same string with repeating whitespace pattern into editors of various size,
3073 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3074 let resize_step = 10.0;
3075 let mut editor_width = 200.0;
3076 while editor_width <= 1000.0 {
3077 update_test_settings(cx, |s| {
3078 s.defaults.tab_size = NonZeroU32::new(tab_size);
3079 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3080 s.defaults.preferred_line_length = Some(editor_width as u32);
3081 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3082 });
3083
3084 let actual_invisibles =
3085 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3086
3087 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3088 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3089 let mut i = 0;
3090 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3091 i = actual_index;
3092 match expected_invisibles.get(i) {
3093 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3094 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3095 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3096 _ => {
3097 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3098 }
3099 },
3100 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3101 }
3102 }
3103 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3104 assert!(
3105 missing_expected_invisibles.is_empty(),
3106 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3107 );
3108
3109 editor_width += resize_step;
3110 }
3111 }
3112
3113 fn collect_invisibles_from_new_editor(
3114 cx: &mut TestAppContext,
3115 editor_mode: EditorMode,
3116 input_text: &str,
3117 editor_width: f32,
3118 ) -> Vec<Invisible> {
3119 info!(
3120 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3121 );
3122 let (_, editor) = cx.add_window(|cx| {
3123 let buffer = MultiBuffer::build_simple(&input_text, cx);
3124 Editor::new(editor_mode, buffer, None, None, cx)
3125 });
3126
3127 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3128 let (_, layout_state) = editor.update(cx, |editor, cx| {
3129 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3130 editor.set_wrap_width(Some(editor_width), cx);
3131
3132 let mut new_parents = Default::default();
3133 let mut notify_views_if_parents_change = Default::default();
3134 let mut layout_cx = LayoutContext::new(
3135 cx,
3136 &mut new_parents,
3137 &mut notify_views_if_parents_change,
3138 false,
3139 );
3140 element.layout(
3141 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3142 editor,
3143 &mut layout_cx,
3144 )
3145 });
3146
3147 layout_state
3148 .position_map
3149 .line_layouts
3150 .iter()
3151 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3152 .flatten()
3153 .cloned()
3154 .collect()
3155 }
3156}