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 let mut start_row = None;
1061 let mut end_row = None;
1062 let color = scrollbar_theme.selections;
1063 let border = Border {
1064 width: 1.,
1065 color: style.thumb.border.color,
1066 overlay: false,
1067 top: false,
1068 right: true,
1069 bottom: false,
1070 left: true,
1071 };
1072 let mut push_region = |start, end| {
1073 if let (Some(start_display), Some(end_display)) = (start, end) {
1074 let start_y = y_for_row(start_display as f32);
1075 let mut end_y = y_for_row(end_display as f32);
1076 if end_y - start_y < 1. {
1077 end_y = start_y + 1.;
1078 }
1079 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1080
1081 scene.push_quad(Quad {
1082 bounds,
1083 background: Some(color),
1084 border,
1085 corner_radius: style.thumb.corner_radius,
1086 })
1087 }
1088 };
1089 for (row, _) in &editor
1090 .background_highlights_in_range_for::<crate::items::BufferSearchHighlights>(
1091 start_anchor..end_anchor,
1092 &layout.position_map.snapshot,
1093 &theme,
1094 )
1095 {
1096 let start_display = row.start;
1097 let end_display = row.end;
1098
1099 if start_row.is_none() {
1100 assert_eq!(end_row, None);
1101 start_row = Some(start_display.row());
1102 end_row = Some(end_display.row());
1103 continue;
1104 }
1105 if let Some(current_end) = end_row.as_mut() {
1106 if start_display.row() > *current_end + 1 {
1107 push_region(start_row, end_row);
1108 start_row = Some(start_display.row());
1109 end_row = Some(end_display.row());
1110 } else {
1111 // Merge two hunks.
1112 *current_end = end_display.row();
1113 }
1114 } else {
1115 unreachable!();
1116 }
1117 }
1118 // We might still have a hunk that was not rendered (if there was a search hit on the last line)
1119 push_region(start_row, end_row);
1120 }
1121
1122 if layout.is_singleton && scrollbar_settings.git_diff {
1123 let diff_style = scrollbar_theme.git.clone();
1124 for hunk in layout
1125 .position_map
1126 .snapshot
1127 .buffer_snapshot
1128 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1129 {
1130 let start_display = Point::new(hunk.buffer_range.start, 0)
1131 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1132 let end_display = Point::new(hunk.buffer_range.end, 0)
1133 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1134 let start_y = y_for_row(start_display.row() as f32);
1135 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1136 y_for_row((end_display.row() + 1) as f32)
1137 } else {
1138 y_for_row((end_display.row()) as f32)
1139 };
1140
1141 if end_y - start_y < 1. {
1142 end_y = start_y + 1.;
1143 }
1144 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1145
1146 let color = match hunk.status() {
1147 DiffHunkStatus::Added => diff_style.inserted,
1148 DiffHunkStatus::Modified => diff_style.modified,
1149 DiffHunkStatus::Removed => diff_style.deleted,
1150 };
1151
1152 let border = Border {
1153 width: 1.,
1154 color: style.thumb.border.color,
1155 overlay: false,
1156 top: false,
1157 right: true,
1158 bottom: false,
1159 left: true,
1160 };
1161
1162 scene.push_quad(Quad {
1163 bounds,
1164 background: Some(color),
1165 border,
1166 corner_radius: style.thumb.corner_radius,
1167 })
1168 }
1169 }
1170
1171 scene.push_quad(Quad {
1172 bounds: thumb_bounds,
1173 border: style.thumb.border,
1174 background: style.thumb.background_color,
1175 corner_radius: style.thumb.corner_radius,
1176 });
1177 }
1178
1179 scene.push_cursor_region(CursorRegion {
1180 bounds: track_bounds,
1181 style: CursorStyle::Arrow,
1182 });
1183 scene.push_mouse_region(
1184 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1185 .on_move(move |_, editor: &mut Editor, cx| {
1186 editor.scroll_manager.show_scrollbar(cx);
1187 })
1188 .on_down(MouseButton::Left, {
1189 let row_range = row_range.clone();
1190 move |event, editor: &mut Editor, cx| {
1191 let y = event.position.y();
1192 if y < thumb_top || thumb_bottom < y {
1193 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1194 let top_row = center_row
1195 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1196 let mut position = editor.scroll_position(cx);
1197 position.set_y(top_row as f32);
1198 editor.set_scroll_position(position, cx);
1199 } else {
1200 editor.scroll_manager.show_scrollbar(cx);
1201 }
1202 }
1203 })
1204 .on_drag(MouseButton::Left, {
1205 move |event, editor: &mut Editor, cx| {
1206 let y = event.prev_mouse_position.y();
1207 let new_y = event.position.y();
1208 if thumb_top < y && y < thumb_bottom {
1209 let mut position = editor.scroll_position(cx);
1210 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1211 if position.y() < 0.0 {
1212 position.set_y(0.);
1213 }
1214 editor.set_scroll_position(position, cx);
1215 }
1216 }
1217 }),
1218 );
1219 }
1220
1221 #[allow(clippy::too_many_arguments)]
1222 fn paint_highlighted_range(
1223 &self,
1224 scene: &mut SceneBuilder,
1225 range: Range<DisplayPoint>,
1226 color: Color,
1227 corner_radius: f32,
1228 line_end_overshoot: f32,
1229 layout: &LayoutState,
1230 content_origin: Vector2F,
1231 scroll_top: f32,
1232 scroll_left: f32,
1233 bounds: RectF,
1234 ) {
1235 let start_row = layout.visible_display_row_range.start;
1236 let end_row = layout.visible_display_row_range.end;
1237 if range.start != range.end {
1238 let row_range = if range.end.column() == 0 {
1239 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1240 } else {
1241 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1242 };
1243
1244 let highlighted_range = HighlightedRange {
1245 color,
1246 line_height: layout.position_map.line_height,
1247 corner_radius,
1248 start_y: content_origin.y()
1249 + row_range.start as f32 * layout.position_map.line_height
1250 - scroll_top,
1251 lines: row_range
1252 .into_iter()
1253 .map(|row| {
1254 let line_layout =
1255 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1256 HighlightedRangeLine {
1257 start_x: if row == range.start.row() {
1258 content_origin.x()
1259 + line_layout.x_for_index(range.start.column() as usize)
1260 - scroll_left
1261 } else {
1262 content_origin.x() - scroll_left
1263 },
1264 end_x: if row == range.end.row() {
1265 content_origin.x()
1266 + line_layout.x_for_index(range.end.column() as usize)
1267 - scroll_left
1268 } else {
1269 content_origin.x() + line_layout.width() + line_end_overshoot
1270 - scroll_left
1271 },
1272 }
1273 })
1274 .collect(),
1275 };
1276
1277 highlighted_range.paint(bounds, scene);
1278 }
1279 }
1280
1281 fn paint_blocks(
1282 &mut self,
1283 scene: &mut SceneBuilder,
1284 bounds: RectF,
1285 visible_bounds: RectF,
1286 layout: &mut LayoutState,
1287 editor: &mut Editor,
1288 cx: &mut ViewContext<Editor>,
1289 ) {
1290 let scroll_position = layout.position_map.snapshot.scroll_position();
1291 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1292 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1293
1294 for block in &mut layout.blocks {
1295 let mut origin = bounds.origin()
1296 + vec2f(
1297 0.,
1298 block.row as f32 * layout.position_map.line_height - scroll_top,
1299 );
1300 if !matches!(block.style, BlockStyle::Sticky) {
1301 origin += vec2f(-scroll_left, 0.);
1302 }
1303 block
1304 .element
1305 .paint(scene, origin, visible_bounds, editor, cx);
1306 }
1307 }
1308
1309 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1310 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1311 let style = &self.style;
1312
1313 cx.text_layout_cache()
1314 .layout_str(
1315 "1".repeat(digit_count).as_str(),
1316 style.text.font_size,
1317 &[(
1318 digit_count,
1319 RunStyle {
1320 font_id: style.text.font_id,
1321 color: Color::black(),
1322 underline: Default::default(),
1323 },
1324 )],
1325 )
1326 .width()
1327 }
1328
1329 //Folds contained in a hunk are ignored apart from shrinking visual size
1330 //If a fold contains any hunks then that fold line is marked as modified
1331 fn layout_git_gutters(
1332 &self,
1333 display_rows: Range<u32>,
1334 snapshot: &EditorSnapshot,
1335 ) -> Vec<DisplayDiffHunk> {
1336 let buffer_snapshot = &snapshot.buffer_snapshot;
1337
1338 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1339 .to_point(snapshot)
1340 .row;
1341 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1342 .to_point(snapshot)
1343 .row;
1344
1345 buffer_snapshot
1346 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1347 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1348 .dedup()
1349 .collect()
1350 }
1351
1352 fn layout_line_numbers(
1353 &self,
1354 rows: Range<u32>,
1355 active_rows: &BTreeMap<u32, bool>,
1356 is_singleton: bool,
1357 snapshot: &EditorSnapshot,
1358 cx: &ViewContext<Editor>,
1359 ) -> (
1360 Vec<Option<text_layout::Line>>,
1361 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1362 ) {
1363 let style = &self.style;
1364 let include_line_numbers = snapshot.mode == EditorMode::Full;
1365 let mut line_number_layouts = Vec::with_capacity(rows.len());
1366 let mut fold_statuses = Vec::with_capacity(rows.len());
1367 let mut line_number = String::new();
1368 for (ix, row) in snapshot
1369 .buffer_rows(rows.start)
1370 .take((rows.end - rows.start) as usize)
1371 .enumerate()
1372 {
1373 let display_row = rows.start + ix as u32;
1374 let (active, color) = if active_rows.contains_key(&display_row) {
1375 (true, style.line_number_active)
1376 } else {
1377 (false, style.line_number)
1378 };
1379 if let Some(buffer_row) = row {
1380 if include_line_numbers {
1381 line_number.clear();
1382 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1383 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1384 &line_number,
1385 style.text.font_size,
1386 &[(
1387 line_number.len(),
1388 RunStyle {
1389 font_id: style.text.font_id,
1390 color,
1391 underline: Default::default(),
1392 },
1393 )],
1394 )));
1395 fold_statuses.push(
1396 is_singleton
1397 .then(|| {
1398 snapshot
1399 .fold_for_line(buffer_row)
1400 .map(|fold_status| (fold_status, buffer_row, active))
1401 })
1402 .flatten(),
1403 )
1404 }
1405 } else {
1406 fold_statuses.push(None);
1407 line_number_layouts.push(None);
1408 }
1409 }
1410
1411 (line_number_layouts, fold_statuses)
1412 }
1413
1414 fn layout_lines(
1415 &mut self,
1416 rows: Range<u32>,
1417 line_number_layouts: &[Option<Line>],
1418 snapshot: &EditorSnapshot,
1419 cx: &ViewContext<Editor>,
1420 ) -> Vec<LineWithInvisibles> {
1421 if rows.start >= rows.end {
1422 return Vec::new();
1423 }
1424
1425 // When the editor is empty and unfocused, then show the placeholder.
1426 if snapshot.is_empty() {
1427 let placeholder_style = self
1428 .style
1429 .placeholder_text
1430 .as_ref()
1431 .unwrap_or(&self.style.text);
1432 let placeholder_text = snapshot.placeholder_text();
1433 let placeholder_lines = placeholder_text
1434 .as_ref()
1435 .map_or("", AsRef::as_ref)
1436 .split('\n')
1437 .skip(rows.start as usize)
1438 .chain(iter::repeat(""))
1439 .take(rows.len());
1440 placeholder_lines
1441 .map(|line| {
1442 cx.text_layout_cache().layout_str(
1443 line,
1444 placeholder_style.font_size,
1445 &[(
1446 line.len(),
1447 RunStyle {
1448 font_id: placeholder_style.font_id,
1449 color: placeholder_style.color,
1450 underline: Default::default(),
1451 },
1452 )],
1453 )
1454 })
1455 .map(|line| LineWithInvisibles {
1456 line,
1457 invisibles: Vec::new(),
1458 })
1459 .collect()
1460 } else {
1461 let style = &self.style;
1462 let chunks = snapshot
1463 .chunks(
1464 rows.clone(),
1465 true,
1466 Some(style.theme.hint),
1467 Some(style.theme.suggestion),
1468 )
1469 .map(|chunk| {
1470 let mut highlight_style = chunk
1471 .syntax_highlight_id
1472 .and_then(|id| id.style(&style.syntax));
1473
1474 if let Some(chunk_highlight) = chunk.highlight_style {
1475 if let Some(highlight_style) = highlight_style.as_mut() {
1476 highlight_style.highlight(chunk_highlight);
1477 } else {
1478 highlight_style = Some(chunk_highlight);
1479 }
1480 }
1481
1482 let mut diagnostic_highlight = HighlightStyle::default();
1483
1484 if chunk.is_unnecessary {
1485 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1486 }
1487
1488 if let Some(severity) = chunk.diagnostic_severity {
1489 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1490 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1491 let diagnostic_style = super::diagnostic_style(severity, true, style);
1492 diagnostic_highlight.underline = Some(Underline {
1493 color: Some(diagnostic_style.message.text.color),
1494 thickness: 1.0.into(),
1495 squiggly: true,
1496 });
1497 }
1498 }
1499
1500 if let Some(highlight_style) = highlight_style.as_mut() {
1501 highlight_style.highlight(diagnostic_highlight);
1502 } else {
1503 highlight_style = Some(diagnostic_highlight);
1504 }
1505
1506 HighlightedChunk {
1507 chunk: chunk.text,
1508 style: highlight_style,
1509 is_tab: chunk.is_tab,
1510 }
1511 });
1512
1513 LineWithInvisibles::from_chunks(
1514 chunks,
1515 &style.text,
1516 cx.text_layout_cache(),
1517 cx.font_cache(),
1518 MAX_LINE_LEN,
1519 rows.len() as usize,
1520 line_number_layouts,
1521 snapshot.mode,
1522 )
1523 }
1524 }
1525
1526 #[allow(clippy::too_many_arguments)]
1527 fn layout_blocks(
1528 &mut self,
1529 rows: Range<u32>,
1530 snapshot: &EditorSnapshot,
1531 editor_width: f32,
1532 scroll_width: f32,
1533 gutter_padding: f32,
1534 gutter_width: f32,
1535 em_width: f32,
1536 text_x: f32,
1537 line_height: f32,
1538 style: &EditorStyle,
1539 line_layouts: &[LineWithInvisibles],
1540 editor: &mut Editor,
1541 cx: &mut LayoutContext<Editor>,
1542 ) -> (f32, Vec<BlockLayout>) {
1543 let mut block_id = 0;
1544 let scroll_x = snapshot.scroll_anchor.offset.x();
1545 let (fixed_blocks, non_fixed_blocks) = snapshot
1546 .blocks_in_range(rows.clone())
1547 .partition::<Vec<_>, _>(|(_, block)| match block {
1548 TransformBlock::ExcerptHeader { .. } => false,
1549 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1550 });
1551 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1552 let mut element = match block {
1553 TransformBlock::Custom(block) => {
1554 let align_to = block
1555 .position()
1556 .to_point(&snapshot.buffer_snapshot)
1557 .to_display_point(snapshot);
1558 let anchor_x = text_x
1559 + if rows.contains(&align_to.row()) {
1560 line_layouts[(align_to.row() - rows.start) as usize]
1561 .line
1562 .x_for_index(align_to.column() as usize)
1563 } else {
1564 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1565 .x_for_index(align_to.column() as usize)
1566 };
1567
1568 block.render(&mut BlockContext {
1569 view_context: cx,
1570 anchor_x,
1571 gutter_padding,
1572 line_height,
1573 scroll_x,
1574 gutter_width,
1575 em_width,
1576 block_id,
1577 })
1578 }
1579 TransformBlock::ExcerptHeader {
1580 id,
1581 buffer,
1582 range,
1583 starts_new_buffer,
1584 ..
1585 } => {
1586 let tooltip_style = theme::current(cx).tooltip.clone();
1587 let include_root = editor
1588 .project
1589 .as_ref()
1590 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1591 .unwrap_or_default();
1592 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1593 let jump_path = ProjectPath {
1594 worktree_id: file.worktree_id(cx),
1595 path: file.path.clone(),
1596 };
1597 let jump_anchor = range
1598 .primary
1599 .as_ref()
1600 .map_or(range.context.start, |primary| primary.start);
1601 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1602
1603 enum JumpIcon {}
1604 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1605 let style = style.jump_icon.style_for(state);
1606 Svg::new("icons/arrow_up_right_8.svg")
1607 .with_color(style.color)
1608 .constrained()
1609 .with_width(style.icon_width)
1610 .aligned()
1611 .contained()
1612 .with_style(style.container)
1613 .constrained()
1614 .with_width(style.button_width)
1615 .with_height(style.button_width)
1616 })
1617 .with_cursor_style(CursorStyle::PointingHand)
1618 .on_click(MouseButton::Left, move |_, editor, cx| {
1619 if let Some(workspace) = editor
1620 .workspace
1621 .as_ref()
1622 .and_then(|(workspace, _)| workspace.upgrade(cx))
1623 {
1624 workspace.update(cx, |workspace, cx| {
1625 Editor::jump(
1626 workspace,
1627 jump_path.clone(),
1628 jump_position,
1629 jump_anchor,
1630 cx,
1631 );
1632 });
1633 }
1634 })
1635 .with_tooltip::<JumpIcon>(
1636 (*id).into(),
1637 "Jump to Buffer".to_string(),
1638 Some(Box::new(crate::OpenExcerpts)),
1639 tooltip_style.clone(),
1640 cx,
1641 )
1642 .aligned()
1643 .flex_float()
1644 });
1645
1646 if *starts_new_buffer {
1647 let editor_font_size = style.text.font_size;
1648 let style = &style.diagnostic_path_header;
1649 let font_size = (style.text_scale_factor * editor_font_size).round();
1650
1651 let path = buffer.resolve_file_path(cx, include_root);
1652 let mut filename = None;
1653 let mut parent_path = None;
1654 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1655 if let Some(path) = path {
1656 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1657 parent_path =
1658 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1659 }
1660
1661 Flex::row()
1662 .with_child(
1663 Label::new(
1664 filename.unwrap_or_else(|| "untitled".to_string()),
1665 style.filename.text.clone().with_font_size(font_size),
1666 )
1667 .contained()
1668 .with_style(style.filename.container)
1669 .aligned(),
1670 )
1671 .with_children(parent_path.map(|path| {
1672 Label::new(path, style.path.text.clone().with_font_size(font_size))
1673 .contained()
1674 .with_style(style.path.container)
1675 .aligned()
1676 }))
1677 .with_children(jump_icon)
1678 .contained()
1679 .with_style(style.container)
1680 .with_padding_left(gutter_padding)
1681 .with_padding_right(gutter_padding)
1682 .expanded()
1683 .into_any_named("path header block")
1684 } else {
1685 let text_style = style.text.clone();
1686 Flex::row()
1687 .with_child(Label::new("⋯", text_style))
1688 .with_children(jump_icon)
1689 .contained()
1690 .with_padding_left(gutter_padding)
1691 .with_padding_right(gutter_padding)
1692 .expanded()
1693 .into_any_named("collapsed context")
1694 }
1695 }
1696 };
1697
1698 element.layout(
1699 SizeConstraint {
1700 min: Vector2F::zero(),
1701 max: vec2f(width, block.height() as f32 * line_height),
1702 },
1703 editor,
1704 cx,
1705 );
1706 element
1707 };
1708
1709 let mut fixed_block_max_width = 0f32;
1710 let mut blocks = Vec::new();
1711 for (row, block) in fixed_blocks {
1712 let element = render_block(block, f32::INFINITY, block_id);
1713 block_id += 1;
1714 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1715 blocks.push(BlockLayout {
1716 row,
1717 element,
1718 style: BlockStyle::Fixed,
1719 });
1720 }
1721 for (row, block) in non_fixed_blocks {
1722 let style = match block {
1723 TransformBlock::Custom(block) => block.style(),
1724 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1725 };
1726 let width = match style {
1727 BlockStyle::Sticky => editor_width,
1728 BlockStyle::Flex => editor_width
1729 .max(fixed_block_max_width)
1730 .max(gutter_width + scroll_width),
1731 BlockStyle::Fixed => unreachable!(),
1732 };
1733 let element = render_block(block, width, block_id);
1734 block_id += 1;
1735 blocks.push(BlockLayout {
1736 row,
1737 element,
1738 style,
1739 });
1740 }
1741 (
1742 scroll_width.max(fixed_block_max_width - gutter_width),
1743 blocks,
1744 )
1745 }
1746}
1747
1748struct HighlightedChunk<'a> {
1749 chunk: &'a str,
1750 style: Option<HighlightStyle>,
1751 is_tab: bool,
1752}
1753
1754#[derive(Debug)]
1755pub struct LineWithInvisibles {
1756 pub line: Line,
1757 invisibles: Vec<Invisible>,
1758}
1759
1760impl LineWithInvisibles {
1761 fn from_chunks<'a>(
1762 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1763 text_style: &TextStyle,
1764 text_layout_cache: &TextLayoutCache,
1765 font_cache: &Arc<FontCache>,
1766 max_line_len: usize,
1767 max_line_count: usize,
1768 line_number_layouts: &[Option<Line>],
1769 editor_mode: EditorMode,
1770 ) -> Vec<Self> {
1771 let mut layouts = Vec::with_capacity(max_line_count);
1772 let mut line = String::new();
1773 let mut invisibles = Vec::new();
1774 let mut styles = Vec::new();
1775 let mut non_whitespace_added = false;
1776 let mut row = 0;
1777 let mut line_exceeded_max_len = false;
1778 for highlighted_chunk in chunks.chain([HighlightedChunk {
1779 chunk: "\n",
1780 style: None,
1781 is_tab: false,
1782 }]) {
1783 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1784 if ix > 0 {
1785 layouts.push(Self {
1786 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1787 invisibles: invisibles.drain(..).collect(),
1788 });
1789
1790 line.clear();
1791 styles.clear();
1792 row += 1;
1793 line_exceeded_max_len = false;
1794 non_whitespace_added = false;
1795 if row == max_line_count {
1796 return layouts;
1797 }
1798 }
1799
1800 if !line_chunk.is_empty() && !line_exceeded_max_len {
1801 let text_style = if let Some(style) = highlighted_chunk.style {
1802 text_style
1803 .clone()
1804 .highlight(style, font_cache)
1805 .map(Cow::Owned)
1806 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1807 } else {
1808 Cow::Borrowed(text_style)
1809 };
1810
1811 if line.len() + line_chunk.len() > max_line_len {
1812 let mut chunk_len = max_line_len - line.len();
1813 while !line_chunk.is_char_boundary(chunk_len) {
1814 chunk_len -= 1;
1815 }
1816 line_chunk = &line_chunk[..chunk_len];
1817 line_exceeded_max_len = true;
1818 }
1819
1820 styles.push((
1821 line_chunk.len(),
1822 RunStyle {
1823 font_id: text_style.font_id,
1824 color: text_style.color,
1825 underline: text_style.underline,
1826 },
1827 ));
1828
1829 if editor_mode == EditorMode::Full {
1830 // Line wrap pads its contents with fake whitespaces,
1831 // avoid printing them
1832 let inside_wrapped_string = line_number_layouts
1833 .get(row)
1834 .and_then(|layout| layout.as_ref())
1835 .is_none();
1836 if highlighted_chunk.is_tab {
1837 if non_whitespace_added || !inside_wrapped_string {
1838 invisibles.push(Invisible::Tab {
1839 line_start_offset: line.len(),
1840 });
1841 }
1842 } else {
1843 invisibles.extend(
1844 line_chunk
1845 .chars()
1846 .enumerate()
1847 .filter(|(_, line_char)| {
1848 let is_whitespace = line_char.is_whitespace();
1849 non_whitespace_added |= !is_whitespace;
1850 is_whitespace
1851 && (non_whitespace_added || !inside_wrapped_string)
1852 })
1853 .map(|(whitespace_index, _)| Invisible::Whitespace {
1854 line_offset: line.len() + whitespace_index,
1855 }),
1856 )
1857 }
1858 }
1859
1860 line.push_str(line_chunk);
1861 }
1862 }
1863 }
1864
1865 layouts
1866 }
1867
1868 fn draw(
1869 &self,
1870 layout: &LayoutState,
1871 row: u32,
1872 scroll_top: f32,
1873 scene: &mut SceneBuilder,
1874 content_origin: Vector2F,
1875 scroll_left: f32,
1876 visible_text_bounds: RectF,
1877 whitespace_setting: ShowWhitespaceSetting,
1878 selection_ranges: &[Range<DisplayPoint>],
1879 visible_bounds: RectF,
1880 cx: &mut ViewContext<Editor>,
1881 ) {
1882 let line_height = layout.position_map.line_height;
1883 let line_y = row as f32 * line_height - scroll_top;
1884
1885 self.line.paint(
1886 scene,
1887 content_origin + vec2f(-scroll_left, line_y),
1888 visible_text_bounds,
1889 line_height,
1890 cx,
1891 );
1892
1893 self.draw_invisibles(
1894 &selection_ranges,
1895 layout,
1896 content_origin,
1897 scroll_left,
1898 line_y,
1899 row,
1900 scene,
1901 visible_bounds,
1902 line_height,
1903 whitespace_setting,
1904 cx,
1905 );
1906 }
1907
1908 fn draw_invisibles(
1909 &self,
1910 selection_ranges: &[Range<DisplayPoint>],
1911 layout: &LayoutState,
1912 content_origin: Vector2F,
1913 scroll_left: f32,
1914 line_y: f32,
1915 row: u32,
1916 scene: &mut SceneBuilder,
1917 visible_bounds: RectF,
1918 line_height: f32,
1919 whitespace_setting: ShowWhitespaceSetting,
1920 cx: &mut ViewContext<Editor>,
1921 ) {
1922 let allowed_invisibles_regions = match whitespace_setting {
1923 ShowWhitespaceSetting::None => return,
1924 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1925 ShowWhitespaceSetting::All => None,
1926 };
1927
1928 for invisible in &self.invisibles {
1929 let (&token_offset, invisible_symbol) = match invisible {
1930 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1931 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1932 };
1933
1934 let x_offset = self.line.x_for_index(token_offset);
1935 let invisible_offset =
1936 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1937 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1938
1939 if let Some(allowed_regions) = allowed_invisibles_regions {
1940 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1941 if !allowed_regions
1942 .iter()
1943 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1944 {
1945 continue;
1946 }
1947 }
1948 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1949 }
1950 }
1951}
1952
1953#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1954enum Invisible {
1955 Tab { line_start_offset: usize },
1956 Whitespace { line_offset: usize },
1957}
1958
1959impl Element<Editor> for EditorElement {
1960 type LayoutState = LayoutState;
1961 type PaintState = ();
1962
1963 fn layout(
1964 &mut self,
1965 constraint: SizeConstraint,
1966 editor: &mut Editor,
1967 cx: &mut LayoutContext<Editor>,
1968 ) -> (Vector2F, Self::LayoutState) {
1969 let mut size = constraint.max;
1970 if size.x().is_infinite() {
1971 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1972 }
1973
1974 let snapshot = editor.snapshot(cx);
1975 let style = self.style.clone();
1976 let line_height = style.text.line_height(cx.font_cache());
1977
1978 let gutter_padding;
1979 let gutter_width;
1980 let gutter_margin;
1981 if snapshot.show_gutter {
1982 let em_width = style.text.em_width(cx.font_cache());
1983 gutter_padding = (em_width * style.gutter_padding_factor).round();
1984 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1985 gutter_margin = -style.text.descent(cx.font_cache());
1986 } else {
1987 gutter_padding = 0.0;
1988 gutter_width = 0.0;
1989 gutter_margin = 0.0;
1990 };
1991
1992 let text_width = size.x() - gutter_width;
1993 let em_width = style.text.em_width(cx.font_cache());
1994 let em_advance = style.text.em_advance(cx.font_cache());
1995 let overscroll = vec2f(em_width, 0.);
1996 let snapshot = {
1997 editor.set_visible_line_count(size.y() / line_height, cx);
1998
1999 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2000 let wrap_width = match editor.soft_wrap_mode(cx) {
2001 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2002 SoftWrap::EditorWidth => editor_width,
2003 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2004 };
2005
2006 if editor.set_wrap_width(Some(wrap_width), cx) {
2007 editor.snapshot(cx)
2008 } else {
2009 snapshot
2010 }
2011 };
2012
2013 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2014 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2015 size.set_y(
2016 scroll_height
2017 .min(constraint.max_along(Axis::Vertical))
2018 .max(constraint.min_along(Axis::Vertical))
2019 .min(line_height * max_lines as f32),
2020 )
2021 } else if let EditorMode::SingleLine = snapshot.mode {
2022 size.set_y(
2023 line_height
2024 .min(constraint.max_along(Axis::Vertical))
2025 .max(constraint.min_along(Axis::Vertical)),
2026 )
2027 } else if size.y().is_infinite() {
2028 size.set_y(scroll_height);
2029 }
2030 let gutter_size = vec2f(gutter_width, size.y());
2031 let text_size = vec2f(text_width, size.y());
2032
2033 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2034 let mut snapshot = editor.snapshot(cx);
2035
2036 let scroll_position = snapshot.scroll_position();
2037 // The scroll position is a fractional point, the whole number of which represents
2038 // the top of the window in terms of display rows.
2039 let start_row = scroll_position.y() as u32;
2040 let height_in_lines = size.y() / line_height;
2041 let max_row = snapshot.max_point().row();
2042
2043 // Add 1 to ensure selections bleed off screen
2044 let end_row = 1 + cmp::min(
2045 (scroll_position.y() + height_in_lines).ceil() as u32,
2046 max_row,
2047 );
2048
2049 let start_anchor = if start_row == 0 {
2050 Anchor::min()
2051 } else {
2052 snapshot
2053 .buffer_snapshot
2054 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2055 };
2056 let end_anchor = if end_row > max_row {
2057 Anchor::max()
2058 } else {
2059 snapshot
2060 .buffer_snapshot
2061 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2062 };
2063
2064 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2065 let mut active_rows = BTreeMap::new();
2066 let mut fold_ranges = Vec::new();
2067 let is_singleton = editor.is_singleton(cx);
2068
2069 let highlighted_rows = editor.highlighted_rows();
2070 let theme = theme::current(cx);
2071 let highlighted_ranges = editor.background_highlights_in_range(
2072 start_anchor..end_anchor,
2073 &snapshot.display_snapshot,
2074 theme.as_ref(),
2075 );
2076
2077 fold_ranges.extend(
2078 snapshot
2079 .folds_in_range(start_anchor..end_anchor)
2080 .map(|anchor| {
2081 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2082 (
2083 start.row,
2084 start.to_display_point(&snapshot.display_snapshot)
2085 ..anchor.end.to_display_point(&snapshot),
2086 )
2087 }),
2088 );
2089
2090 let mut remote_selections = HashMap::default();
2091 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2092 .buffer_snapshot
2093 .remote_selections_in_range(&(start_anchor..end_anchor))
2094 {
2095 // The local selections match the leader's selections.
2096 if Some(replica_id) == editor.leader_replica_id {
2097 continue;
2098 }
2099 remote_selections
2100 .entry(replica_id)
2101 .or_insert(Vec::new())
2102 .push(SelectionLayout::new(
2103 selection,
2104 line_mode,
2105 cursor_shape,
2106 &snapshot.display_snapshot,
2107 ));
2108 }
2109 selections.extend(remote_selections);
2110
2111 if editor.show_local_selections {
2112 let mut local_selections = editor
2113 .selections
2114 .disjoint_in_range(start_anchor..end_anchor, cx);
2115 local_selections.extend(editor.selections.pending(cx));
2116 for selection in &local_selections {
2117 let is_empty = selection.start == selection.end;
2118 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2119 let selection_end = snapshot.next_line_boundary(selection.end).1;
2120 for row in cmp::max(selection_start.row(), start_row)
2121 ..=cmp::min(selection_end.row(), end_row)
2122 {
2123 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2124 *contains_non_empty_selection |= !is_empty;
2125 }
2126 }
2127
2128 // Render the local selections in the leader's color when following.
2129 let local_replica_id = editor
2130 .leader_replica_id
2131 .unwrap_or_else(|| editor.replica_id(cx));
2132
2133 selections.push((
2134 local_replica_id,
2135 local_selections
2136 .into_iter()
2137 .map(|selection| {
2138 SelectionLayout::new(
2139 selection,
2140 editor.selections.line_mode,
2141 editor.cursor_shape,
2142 &snapshot.display_snapshot,
2143 )
2144 })
2145 .collect(),
2146 ));
2147 }
2148
2149 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2150 let show_scrollbars = match scrollbar_settings.show {
2151 ShowScrollbar::Auto => {
2152 // Git
2153 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2154 // Scrollmanager
2155 || editor.scroll_manager.scrollbars_visible()
2156 }
2157 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2158 ShowScrollbar::Always => true,
2159 ShowScrollbar::Never => false,
2160 };
2161
2162 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2163 .into_iter()
2164 .map(|(id, fold)| {
2165 let color = self
2166 .style
2167 .folds
2168 .ellipses
2169 .background
2170 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2171 .color;
2172
2173 (id, fold, color)
2174 })
2175 .collect();
2176
2177 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2178 start_row..end_row,
2179 &active_rows,
2180 is_singleton,
2181 &snapshot,
2182 cx,
2183 );
2184
2185 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2186
2187 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2188
2189 let mut max_visible_line_width = 0.0;
2190 let line_layouts =
2191 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2192 for line_with_invisibles in &line_layouts {
2193 if line_with_invisibles.line.width() > max_visible_line_width {
2194 max_visible_line_width = line_with_invisibles.line.width();
2195 }
2196 }
2197
2198 let style = self.style.clone();
2199 let longest_line_width = layout_line(
2200 snapshot.longest_row(),
2201 &snapshot,
2202 &style,
2203 cx.text_layout_cache(),
2204 )
2205 .width();
2206 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2207 let em_width = style.text.em_width(cx.font_cache());
2208 let (scroll_width, blocks) = self.layout_blocks(
2209 start_row..end_row,
2210 &snapshot,
2211 size.x(),
2212 scroll_width,
2213 gutter_padding,
2214 gutter_width,
2215 em_width,
2216 gutter_width + gutter_margin,
2217 line_height,
2218 &style,
2219 &line_layouts,
2220 editor,
2221 cx,
2222 );
2223
2224 let scroll_max = vec2f(
2225 ((scroll_width - text_size.x()) / em_width).max(0.0),
2226 max_row as f32,
2227 );
2228
2229 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2230
2231 let autoscrolled = if autoscroll_horizontally {
2232 editor.autoscroll_horizontally(
2233 start_row,
2234 text_size.x(),
2235 scroll_width,
2236 em_width,
2237 &line_layouts,
2238 cx,
2239 )
2240 } else {
2241 false
2242 };
2243
2244 if clamped || autoscrolled {
2245 snapshot = editor.snapshot(cx);
2246 }
2247
2248 let newest_selection_head = editor
2249 .selections
2250 .newest::<usize>(cx)
2251 .head()
2252 .to_display_point(&snapshot);
2253 let style = editor.style(cx);
2254
2255 let mut context_menu = None;
2256 let mut code_actions_indicator = None;
2257 if (start_row..end_row).contains(&newest_selection_head.row()) {
2258 if editor.context_menu_visible() {
2259 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2260 }
2261
2262 let active = matches!(
2263 editor.context_menu,
2264 Some(crate::ContextMenu::CodeActions(_))
2265 );
2266
2267 code_actions_indicator = editor
2268 .render_code_actions_indicator(&style, active, cx)
2269 .map(|indicator| (newest_selection_head.row(), indicator));
2270 }
2271
2272 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2273 let mut hover = editor
2274 .hover_state
2275 .render(&snapshot, &style, visible_rows, cx);
2276 let mode = editor.mode;
2277
2278 let mut fold_indicators = editor.render_fold_indicators(
2279 fold_statuses,
2280 &style,
2281 editor.gutter_hovered,
2282 line_height,
2283 gutter_margin,
2284 cx,
2285 );
2286
2287 if let Some((_, context_menu)) = context_menu.as_mut() {
2288 context_menu.layout(
2289 SizeConstraint {
2290 min: Vector2F::zero(),
2291 max: vec2f(
2292 cx.window_size().x() * 0.7,
2293 (12. * line_height).min((size.y() - line_height) / 2.),
2294 ),
2295 },
2296 editor,
2297 cx,
2298 );
2299 }
2300
2301 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2302 indicator.layout(
2303 SizeConstraint::strict_along(
2304 Axis::Vertical,
2305 line_height * style.code_actions.vertical_scale,
2306 ),
2307 editor,
2308 cx,
2309 );
2310 }
2311
2312 for fold_indicator in fold_indicators.iter_mut() {
2313 if let Some(indicator) = fold_indicator.as_mut() {
2314 indicator.layout(
2315 SizeConstraint::strict_along(
2316 Axis::Vertical,
2317 line_height * style.code_actions.vertical_scale,
2318 ),
2319 editor,
2320 cx,
2321 );
2322 }
2323 }
2324
2325 if let Some((_, hover_popovers)) = hover.as_mut() {
2326 for hover_popover in hover_popovers.iter_mut() {
2327 hover_popover.layout(
2328 SizeConstraint {
2329 min: Vector2F::zero(),
2330 max: vec2f(
2331 (120. * em_width) // Default size
2332 .min(size.x() / 2.) // Shrink to half of the editor width
2333 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2334 (16. * line_height) // Default size
2335 .min(size.y() / 2.) // Shrink to half of the editor height
2336 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2337 ),
2338 },
2339 editor,
2340 cx,
2341 );
2342 }
2343 }
2344
2345 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2346 let invisible_symbol_style = RunStyle {
2347 color: self.style.whitespace,
2348 font_id: self.style.text.font_id,
2349 underline: Default::default(),
2350 };
2351
2352 (
2353 size,
2354 LayoutState {
2355 mode,
2356 position_map: Arc::new(PositionMap {
2357 size,
2358 scroll_max,
2359 line_layouts,
2360 line_height,
2361 em_width,
2362 em_advance,
2363 snapshot,
2364 }),
2365 visible_display_row_range: start_row..end_row,
2366 gutter_size,
2367 gutter_padding,
2368 text_size,
2369 scrollbar_row_range,
2370 show_scrollbars,
2371 is_singleton,
2372 max_row,
2373 gutter_margin,
2374 active_rows,
2375 highlighted_rows,
2376 highlighted_ranges,
2377 fold_ranges,
2378 line_number_layouts,
2379 display_hunks,
2380 blocks,
2381 selections,
2382 context_menu,
2383 code_actions_indicator,
2384 fold_indicators,
2385 tab_invisible: cx.text_layout_cache().layout_str(
2386 "→",
2387 invisible_symbol_font_size,
2388 &[("→".len(), invisible_symbol_style)],
2389 ),
2390 space_invisible: cx.text_layout_cache().layout_str(
2391 "•",
2392 invisible_symbol_font_size,
2393 &[("•".len(), invisible_symbol_style)],
2394 ),
2395 hover_popovers: hover,
2396 },
2397 )
2398 }
2399
2400 fn paint(
2401 &mut self,
2402 scene: &mut SceneBuilder,
2403 bounds: RectF,
2404 visible_bounds: RectF,
2405 layout: &mut Self::LayoutState,
2406 editor: &mut Editor,
2407 cx: &mut ViewContext<Editor>,
2408 ) -> Self::PaintState {
2409 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2410 scene.push_layer(Some(visible_bounds));
2411
2412 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2413 let text_bounds = RectF::new(
2414 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2415 layout.text_size,
2416 );
2417
2418 Self::attach_mouse_handlers(
2419 scene,
2420 &layout.position_map,
2421 layout.hover_popovers.is_some(),
2422 visible_bounds,
2423 text_bounds,
2424 gutter_bounds,
2425 bounds,
2426 cx,
2427 );
2428
2429 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2430 if layout.gutter_size.x() > 0. {
2431 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2432 }
2433 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2434
2435 scene.push_layer(Some(bounds));
2436 if !layout.blocks.is_empty() {
2437 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2438 }
2439 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2440 scene.pop_layer();
2441
2442 scene.pop_layer();
2443 }
2444
2445 fn rect_for_text_range(
2446 &self,
2447 range_utf16: Range<usize>,
2448 bounds: RectF,
2449 _: RectF,
2450 layout: &Self::LayoutState,
2451 _: &Self::PaintState,
2452 _: &Editor,
2453 _: &ViewContext<Editor>,
2454 ) -> Option<RectF> {
2455 let text_bounds = RectF::new(
2456 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2457 layout.text_size,
2458 );
2459 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2460 let scroll_position = layout.position_map.snapshot.scroll_position();
2461 let start_row = scroll_position.y() as u32;
2462 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2463 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2464
2465 let range_start = OffsetUtf16(range_utf16.start)
2466 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2467 if range_start.row() < start_row {
2468 return None;
2469 }
2470
2471 let line = &layout
2472 .position_map
2473 .line_layouts
2474 .get((range_start.row() - start_row) as usize)?
2475 .line;
2476 let range_start_x = line.x_for_index(range_start.column() as usize);
2477 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2478 Some(RectF::new(
2479 content_origin
2480 + vec2f(
2481 range_start_x,
2482 range_start_y + layout.position_map.line_height,
2483 )
2484 - vec2f(scroll_left, scroll_top),
2485 vec2f(
2486 layout.position_map.em_width,
2487 layout.position_map.line_height,
2488 ),
2489 ))
2490 }
2491
2492 fn debug(
2493 &self,
2494 bounds: RectF,
2495 _: &Self::LayoutState,
2496 _: &Self::PaintState,
2497 _: &Editor,
2498 _: &ViewContext<Editor>,
2499 ) -> json::Value {
2500 json!({
2501 "type": "BufferElement",
2502 "bounds": bounds.to_json()
2503 })
2504 }
2505}
2506
2507type BufferRow = u32;
2508
2509pub struct LayoutState {
2510 position_map: Arc<PositionMap>,
2511 gutter_size: Vector2F,
2512 gutter_padding: f32,
2513 gutter_margin: f32,
2514 text_size: Vector2F,
2515 mode: EditorMode,
2516 visible_display_row_range: Range<u32>,
2517 active_rows: BTreeMap<u32, bool>,
2518 highlighted_rows: Option<Range<u32>>,
2519 line_number_layouts: Vec<Option<text_layout::Line>>,
2520 display_hunks: Vec<DisplayDiffHunk>,
2521 blocks: Vec<BlockLayout>,
2522 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2523 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2524 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2525 scrollbar_row_range: Range<f32>,
2526 show_scrollbars: bool,
2527 is_singleton: bool,
2528 max_row: u32,
2529 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2530 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2531 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2532 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2533 tab_invisible: Line,
2534 space_invisible: Line,
2535}
2536
2537struct PositionMap {
2538 size: Vector2F,
2539 line_height: f32,
2540 scroll_max: Vector2F,
2541 em_width: f32,
2542 em_advance: f32,
2543 line_layouts: Vec<LineWithInvisibles>,
2544 snapshot: EditorSnapshot,
2545}
2546
2547impl PositionMap {
2548 /// Returns two display points:
2549 /// 1. The nearest *valid* position in the editor
2550 /// 2. An unclipped, potentially *invalid* position that maps directly to
2551 /// the given pixel position.
2552 fn point_for_position(
2553 &self,
2554 text_bounds: RectF,
2555 position: Vector2F,
2556 ) -> (DisplayPoint, DisplayPoint) {
2557 let scroll_position = self.snapshot.scroll_position();
2558 let position = position - text_bounds.origin();
2559 let y = position.y().max(0.0).min(self.size.y());
2560 let x = position.x() + (scroll_position.x() * self.em_width);
2561 let row = (y / self.line_height + scroll_position.y()) as u32;
2562 let (column, x_overshoot) = if let Some(line) = self
2563 .line_layouts
2564 .get(row as usize - scroll_position.y() as usize)
2565 .map(|line_with_spaces| &line_with_spaces.line)
2566 {
2567 if let Some(ix) = line.index_for_x(x) {
2568 (ix as u32, 0.0)
2569 } else {
2570 (line.len() as u32, 0f32.max(x - line.width()))
2571 }
2572 } else {
2573 (0, x)
2574 };
2575
2576 let mut target_point = DisplayPoint::new(row, column);
2577 let point = self.snapshot.clip_point(target_point, Bias::Left);
2578 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2579
2580 (point, target_point)
2581 }
2582}
2583
2584struct BlockLayout {
2585 row: u32,
2586 element: AnyElement<Editor>,
2587 style: BlockStyle,
2588}
2589
2590fn layout_line(
2591 row: u32,
2592 snapshot: &EditorSnapshot,
2593 style: &EditorStyle,
2594 layout_cache: &TextLayoutCache,
2595) -> text_layout::Line {
2596 let mut line = snapshot.line(row);
2597
2598 if line.len() > MAX_LINE_LEN {
2599 let mut len = MAX_LINE_LEN;
2600 while !line.is_char_boundary(len) {
2601 len -= 1;
2602 }
2603
2604 line.truncate(len);
2605 }
2606
2607 layout_cache.layout_str(
2608 &line,
2609 style.text.font_size,
2610 &[(
2611 snapshot.line_len(row) as usize,
2612 RunStyle {
2613 font_id: style.text.font_id,
2614 color: Color::black(),
2615 underline: Default::default(),
2616 },
2617 )],
2618 )
2619}
2620
2621#[derive(Debug)]
2622pub struct Cursor {
2623 origin: Vector2F,
2624 block_width: f32,
2625 line_height: f32,
2626 color: Color,
2627 shape: CursorShape,
2628 block_text: Option<Line>,
2629}
2630
2631impl Cursor {
2632 pub fn new(
2633 origin: Vector2F,
2634 block_width: f32,
2635 line_height: f32,
2636 color: Color,
2637 shape: CursorShape,
2638 block_text: Option<Line>,
2639 ) -> Cursor {
2640 Cursor {
2641 origin,
2642 block_width,
2643 line_height,
2644 color,
2645 shape,
2646 block_text,
2647 }
2648 }
2649
2650 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2651 RectF::new(
2652 self.origin + origin,
2653 vec2f(self.block_width, self.line_height),
2654 )
2655 }
2656
2657 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2658 let bounds = match self.shape {
2659 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2660 CursorShape::Block | CursorShape::Hollow => RectF::new(
2661 self.origin + origin,
2662 vec2f(self.block_width, self.line_height),
2663 ),
2664 CursorShape::Underscore => RectF::new(
2665 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2666 vec2f(self.block_width, 2.0),
2667 ),
2668 };
2669
2670 //Draw background or border quad
2671 if matches!(self.shape, CursorShape::Hollow) {
2672 scene.push_quad(Quad {
2673 bounds,
2674 background: None,
2675 border: Border::all(1., self.color),
2676 corner_radius: 0.,
2677 });
2678 } else {
2679 scene.push_quad(Quad {
2680 bounds,
2681 background: Some(self.color),
2682 border: Default::default(),
2683 corner_radius: 0.,
2684 });
2685 }
2686
2687 if let Some(block_text) = &self.block_text {
2688 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2689 }
2690 }
2691
2692 pub fn shape(&self) -> CursorShape {
2693 self.shape
2694 }
2695}
2696
2697#[derive(Debug)]
2698pub struct HighlightedRange {
2699 pub start_y: f32,
2700 pub line_height: f32,
2701 pub lines: Vec<HighlightedRangeLine>,
2702 pub color: Color,
2703 pub corner_radius: f32,
2704}
2705
2706#[derive(Debug)]
2707pub struct HighlightedRangeLine {
2708 pub start_x: f32,
2709 pub end_x: f32,
2710}
2711
2712impl HighlightedRange {
2713 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2714 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2715 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2716 self.paint_lines(
2717 self.start_y + self.line_height,
2718 &self.lines[1..],
2719 bounds,
2720 scene,
2721 );
2722 } else {
2723 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2724 }
2725 }
2726
2727 fn paint_lines(
2728 &self,
2729 start_y: f32,
2730 lines: &[HighlightedRangeLine],
2731 bounds: RectF,
2732 scene: &mut SceneBuilder,
2733 ) {
2734 if lines.is_empty() {
2735 return;
2736 }
2737
2738 let mut path = PathBuilder::new();
2739 let first_line = lines.first().unwrap();
2740 let last_line = lines.last().unwrap();
2741
2742 let first_top_left = vec2f(first_line.start_x, start_y);
2743 let first_top_right = vec2f(first_line.end_x, start_y);
2744
2745 let curve_height = vec2f(0., self.corner_radius);
2746 let curve_width = |start_x: f32, end_x: f32| {
2747 let max = (end_x - start_x) / 2.;
2748 let width = if max < self.corner_radius {
2749 max
2750 } else {
2751 self.corner_radius
2752 };
2753
2754 vec2f(width, 0.)
2755 };
2756
2757 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2758 path.reset(first_top_right - top_curve_width);
2759 path.curve_to(first_top_right + curve_height, first_top_right);
2760
2761 let mut iter = lines.iter().enumerate().peekable();
2762 while let Some((ix, line)) = iter.next() {
2763 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2764
2765 if let Some((_, next_line)) = iter.peek() {
2766 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2767
2768 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2769 Ordering::Equal => {
2770 path.line_to(bottom_right);
2771 }
2772 Ordering::Less => {
2773 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2774 path.line_to(bottom_right - curve_height);
2775 if self.corner_radius > 0. {
2776 path.curve_to(bottom_right - curve_width, bottom_right);
2777 }
2778 path.line_to(next_top_right + curve_width);
2779 if self.corner_radius > 0. {
2780 path.curve_to(next_top_right + curve_height, next_top_right);
2781 }
2782 }
2783 Ordering::Greater => {
2784 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2785 path.line_to(bottom_right - curve_height);
2786 if self.corner_radius > 0. {
2787 path.curve_to(bottom_right + curve_width, bottom_right);
2788 }
2789 path.line_to(next_top_right - curve_width);
2790 if self.corner_radius > 0. {
2791 path.curve_to(next_top_right + curve_height, next_top_right);
2792 }
2793 }
2794 }
2795 } else {
2796 let curve_width = curve_width(line.start_x, line.end_x);
2797 path.line_to(bottom_right - curve_height);
2798 if self.corner_radius > 0. {
2799 path.curve_to(bottom_right - curve_width, bottom_right);
2800 }
2801
2802 let bottom_left = vec2f(line.start_x, bottom_right.y());
2803 path.line_to(bottom_left + curve_width);
2804 if self.corner_radius > 0. {
2805 path.curve_to(bottom_left - curve_height, bottom_left);
2806 }
2807 }
2808 }
2809
2810 if first_line.start_x > last_line.start_x {
2811 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2812 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2813 path.line_to(second_top_left + curve_height);
2814 if self.corner_radius > 0. {
2815 path.curve_to(second_top_left + curve_width, second_top_left);
2816 }
2817 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2818 path.line_to(first_bottom_left - curve_width);
2819 if self.corner_radius > 0. {
2820 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2821 }
2822 }
2823
2824 path.line_to(first_top_left + curve_height);
2825 if self.corner_radius > 0. {
2826 path.curve_to(first_top_left + top_curve_width, first_top_left);
2827 }
2828 path.line_to(first_top_right - top_curve_width);
2829
2830 scene.push_path(path.build(self.color, Some(bounds)));
2831 }
2832}
2833
2834fn position_to_display_point(
2835 position: Vector2F,
2836 text_bounds: RectF,
2837 position_map: &PositionMap,
2838) -> Option<DisplayPoint> {
2839 if text_bounds.contains_point(position) {
2840 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2841 if point == target_point {
2842 Some(point)
2843 } else {
2844 None
2845 }
2846 } else {
2847 None
2848 }
2849}
2850
2851fn range_to_bounds(
2852 range: &Range<DisplayPoint>,
2853 content_origin: Vector2F,
2854 scroll_left: f32,
2855 scroll_top: f32,
2856 visible_row_range: &Range<u32>,
2857 line_end_overshoot: f32,
2858 position_map: &PositionMap,
2859) -> impl Iterator<Item = RectF> {
2860 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2861
2862 if range.start == range.end {
2863 return bounds.into_iter();
2864 }
2865
2866 let start_row = visible_row_range.start;
2867 let end_row = visible_row_range.end;
2868
2869 let row_range = if range.end.column() == 0 {
2870 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2871 } else {
2872 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2873 };
2874
2875 let first_y =
2876 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2877
2878 for (idx, row) in row_range.enumerate() {
2879 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2880
2881 let start_x = if row == range.start.row() {
2882 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2883 - scroll_left
2884 } else {
2885 content_origin.x() - scroll_left
2886 };
2887
2888 let end_x = if row == range.end.row() {
2889 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2890 } else {
2891 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2892 };
2893
2894 bounds.push(RectF::from_points(
2895 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2896 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2897 ))
2898 }
2899
2900 bounds.into_iter()
2901}
2902
2903pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2904 delta.powf(1.5) / 100.0
2905}
2906
2907fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2908 delta.powf(1.2) / 300.0
2909}
2910
2911#[cfg(test)]
2912mod tests {
2913 use super::*;
2914 use crate::{
2915 display_map::{BlockDisposition, BlockProperties},
2916 editor_tests::{init_test, update_test_settings},
2917 Editor, MultiBuffer,
2918 };
2919 use gpui::TestAppContext;
2920 use language::language_settings;
2921 use log::info;
2922 use std::{num::NonZeroU32, sync::Arc};
2923 use util::test::sample_text;
2924
2925 #[gpui::test]
2926 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2927 init_test(cx, |_| {});
2928
2929 let (_, editor) = cx.add_window(|cx| {
2930 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2931 Editor::new(EditorMode::Full, buffer, None, None, cx)
2932 });
2933 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2934
2935 let layouts = editor.update(cx, |editor, cx| {
2936 let snapshot = editor.snapshot(cx);
2937 element
2938 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2939 .0
2940 });
2941 assert_eq!(layouts.len(), 6);
2942 }
2943
2944 #[gpui::test]
2945 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2946 init_test(cx, |_| {});
2947
2948 let (_, editor) = cx.add_window(|cx| {
2949 let buffer = MultiBuffer::build_simple("", cx);
2950 Editor::new(EditorMode::Full, buffer, None, None, cx)
2951 });
2952
2953 editor.update(cx, |editor, cx| {
2954 editor.set_placeholder_text("hello", cx);
2955 editor.insert_blocks(
2956 [BlockProperties {
2957 style: BlockStyle::Fixed,
2958 disposition: BlockDisposition::Above,
2959 height: 3,
2960 position: Anchor::min(),
2961 render: Arc::new(|_| Empty::new().into_any()),
2962 }],
2963 None,
2964 cx,
2965 );
2966
2967 // Blur the editor so that it displays placeholder text.
2968 cx.blur();
2969 });
2970
2971 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2972 let (size, mut state) = editor.update(cx, |editor, cx| {
2973 let mut new_parents = Default::default();
2974 let mut notify_views_if_parents_change = Default::default();
2975 let mut layout_cx = LayoutContext::new(
2976 cx,
2977 &mut new_parents,
2978 &mut notify_views_if_parents_change,
2979 false,
2980 );
2981 element.layout(
2982 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2983 editor,
2984 &mut layout_cx,
2985 )
2986 });
2987
2988 assert_eq!(state.position_map.line_layouts.len(), 4);
2989 assert_eq!(
2990 state
2991 .line_number_layouts
2992 .iter()
2993 .map(Option::is_some)
2994 .collect::<Vec<_>>(),
2995 &[false, false, false, true]
2996 );
2997
2998 // Don't panic.
2999 let mut scene = SceneBuilder::new(1.0);
3000 let bounds = RectF::new(Default::default(), size);
3001 editor.update(cx, |editor, cx| {
3002 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3003 });
3004 }
3005
3006 #[gpui::test]
3007 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3008 const TAB_SIZE: u32 = 4;
3009
3010 let input_text = "\t \t|\t| a b";
3011 let expected_invisibles = vec![
3012 Invisible::Tab {
3013 line_start_offset: 0,
3014 },
3015 Invisible::Whitespace {
3016 line_offset: TAB_SIZE as usize,
3017 },
3018 Invisible::Tab {
3019 line_start_offset: TAB_SIZE as usize + 1,
3020 },
3021 Invisible::Tab {
3022 line_start_offset: TAB_SIZE as usize * 2 + 1,
3023 },
3024 Invisible::Whitespace {
3025 line_offset: TAB_SIZE as usize * 3 + 1,
3026 },
3027 Invisible::Whitespace {
3028 line_offset: TAB_SIZE as usize * 3 + 3,
3029 },
3030 ];
3031 assert_eq!(
3032 expected_invisibles.len(),
3033 input_text
3034 .chars()
3035 .filter(|initial_char| initial_char.is_whitespace())
3036 .count(),
3037 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3038 );
3039
3040 init_test(cx, |s| {
3041 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3042 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3043 });
3044
3045 let actual_invisibles =
3046 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3047
3048 assert_eq!(expected_invisibles, actual_invisibles);
3049 }
3050
3051 #[gpui::test]
3052 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3053 init_test(cx, |s| {
3054 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3055 s.defaults.tab_size = NonZeroU32::new(4);
3056 });
3057
3058 for editor_mode_without_invisibles in [
3059 EditorMode::SingleLine,
3060 EditorMode::AutoHeight { max_lines: 100 },
3061 ] {
3062 let invisibles = collect_invisibles_from_new_editor(
3063 cx,
3064 editor_mode_without_invisibles,
3065 "\t\t\t| | a b",
3066 500.0,
3067 );
3068 assert!(invisibles.is_empty(),
3069 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3070 }
3071 }
3072
3073 #[gpui::test]
3074 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3075 let tab_size = 4;
3076 let input_text = "a\tbcd ".repeat(9);
3077 let repeated_invisibles = [
3078 Invisible::Tab {
3079 line_start_offset: 1,
3080 },
3081 Invisible::Whitespace {
3082 line_offset: tab_size as usize + 3,
3083 },
3084 Invisible::Whitespace {
3085 line_offset: tab_size as usize + 4,
3086 },
3087 Invisible::Whitespace {
3088 line_offset: tab_size as usize + 5,
3089 },
3090 ];
3091 let expected_invisibles = std::iter::once(repeated_invisibles)
3092 .cycle()
3093 .take(9)
3094 .flatten()
3095 .collect::<Vec<_>>();
3096 assert_eq!(
3097 expected_invisibles.len(),
3098 input_text
3099 .chars()
3100 .filter(|initial_char| initial_char.is_whitespace())
3101 .count(),
3102 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3103 );
3104 info!("Expected invisibles: {expected_invisibles:?}");
3105
3106 init_test(cx, |_| {});
3107
3108 // Put the same string with repeating whitespace pattern into editors of various size,
3109 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3110 let resize_step = 10.0;
3111 let mut editor_width = 200.0;
3112 while editor_width <= 1000.0 {
3113 update_test_settings(cx, |s| {
3114 s.defaults.tab_size = NonZeroU32::new(tab_size);
3115 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3116 s.defaults.preferred_line_length = Some(editor_width as u32);
3117 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3118 });
3119
3120 let actual_invisibles =
3121 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3122
3123 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3124 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3125 let mut i = 0;
3126 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3127 i = actual_index;
3128 match expected_invisibles.get(i) {
3129 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3130 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3131 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3132 _ => {
3133 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3134 }
3135 },
3136 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3137 }
3138 }
3139 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3140 assert!(
3141 missing_expected_invisibles.is_empty(),
3142 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3143 );
3144
3145 editor_width += resize_step;
3146 }
3147 }
3148
3149 fn collect_invisibles_from_new_editor(
3150 cx: &mut TestAppContext,
3151 editor_mode: EditorMode,
3152 input_text: &str,
3153 editor_width: f32,
3154 ) -> Vec<Invisible> {
3155 info!(
3156 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3157 );
3158 let (_, editor) = cx.add_window(|cx| {
3159 let buffer = MultiBuffer::build_simple(&input_text, cx);
3160 Editor::new(editor_mode, buffer, None, None, cx)
3161 });
3162
3163 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3164 let (_, layout_state) = editor.update(cx, |editor, cx| {
3165 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3166 editor.set_wrap_width(Some(editor_width), cx);
3167
3168 let mut new_parents = Default::default();
3169 let mut notify_views_if_parents_change = Default::default();
3170 let mut layout_cx = LayoutContext::new(
3171 cx,
3172 &mut new_parents,
3173 &mut notify_views_if_parents_change,
3174 false,
3175 );
3176 element.layout(
3177 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3178 editor,
3179 &mut layout_cx,
3180 )
3181 });
3182
3183 layout_state
3184 .position_map
3185 .line_layouts
3186 .iter()
3187 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3188 .flatten()
3189 .cloned()
3190 .collect()
3191 }
3192}