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 is_newest: bool,
65 range: Range<DisplayPoint>,
66}
67
68impl SelectionLayout {
69 fn new<T: ToPoint + ToDisplayPoint + Clone>(
70 selection: Selection<T>,
71 line_mode: bool,
72 cursor_shape: CursorShape,
73 map: &DisplaySnapshot,
74 is_newest: bool,
75 ) -> Self {
76 if line_mode {
77 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
78 let point_range = map.expand_to_line(selection.range());
79 Self {
80 head: selection.head().to_display_point(map),
81 cursor_shape,
82 is_newest,
83 range: point_range.start.to_display_point(map)
84 ..point_range.end.to_display_point(map),
85 }
86 } else {
87 let selection = selection.map(|p| p.to_display_point(map));
88 Self {
89 head: selection.head(),
90 cursor_shape,
91 is_newest,
92 range: selection.range(),
93 }
94 }
95 }
96}
97
98pub struct EditorElement {
99 style: Arc<EditorStyle>,
100}
101
102impl EditorElement {
103 pub fn new(style: EditorStyle) -> Self {
104 Self {
105 style: Arc::new(style),
106 }
107 }
108
109 fn attach_mouse_handlers(
110 scene: &mut SceneBuilder,
111 position_map: &Arc<PositionMap>,
112 has_popovers: bool,
113 visible_bounds: RectF,
114 text_bounds: RectF,
115 gutter_bounds: RectF,
116 bounds: RectF,
117 cx: &mut ViewContext<Editor>,
118 ) {
119 enum EditorElementMouseHandlers {}
120 scene.push_mouse_region(
121 MouseRegion::new::<EditorElementMouseHandlers>(
122 cx.view_id(),
123 cx.view_id(),
124 visible_bounds,
125 )
126 .on_down(MouseButton::Left, {
127 let position_map = position_map.clone();
128 move |event, editor, cx| {
129 if !Self::mouse_down(
130 editor,
131 event.platform_event,
132 position_map.as_ref(),
133 text_bounds,
134 gutter_bounds,
135 cx,
136 ) {
137 cx.propagate_event();
138 }
139 }
140 })
141 .on_down(MouseButton::Right, {
142 let position_map = position_map.clone();
143 move |event, editor, cx| {
144 if !Self::mouse_right_down(
145 editor,
146 event.position,
147 position_map.as_ref(),
148 text_bounds,
149 cx,
150 ) {
151 cx.propagate_event();
152 }
153 }
154 })
155 .on_up(MouseButton::Left, {
156 let position_map = position_map.clone();
157 move |event, editor, cx| {
158 if !Self::mouse_up(
159 editor,
160 event.position,
161 event.cmd,
162 event.shift,
163 event.alt,
164 position_map.as_ref(),
165 text_bounds,
166 cx,
167 ) {
168 cx.propagate_event()
169 }
170 }
171 })
172 .on_drag(MouseButton::Left, {
173 let position_map = position_map.clone();
174 move |event, editor, cx| {
175 if !Self::mouse_dragged(
176 editor,
177 event.platform_event,
178 position_map.as_ref(),
179 text_bounds,
180 cx,
181 ) {
182 cx.propagate_event()
183 }
184 }
185 })
186 .on_move({
187 let position_map = position_map.clone();
188 move |event, editor, cx| {
189 if !Self::mouse_moved(
190 editor,
191 event.platform_event,
192 &position_map,
193 text_bounds,
194 cx,
195 ) {
196 cx.propagate_event()
197 }
198 }
199 })
200 .on_move_out(move |_, editor: &mut Editor, cx| {
201 if has_popovers {
202 hide_hover(editor, cx);
203 }
204 })
205 .on_scroll({
206 let position_map = position_map.clone();
207 move |event, editor, cx| {
208 if !Self::scroll(
209 editor,
210 event.position,
211 *event.delta.raw(),
212 event.delta.precise(),
213 &position_map,
214 bounds,
215 cx,
216 ) {
217 cx.propagate_event()
218 }
219 }
220 }),
221 );
222
223 enum GutterHandlers {}
224 scene.push_mouse_region(
225 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
226 .on_hover(|hover, editor: &mut Editor, cx| {
227 editor.gutter_hover(
228 &GutterHover {
229 hovered: hover.started,
230 },
231 cx,
232 );
233 }),
234 )
235 }
236
237 fn mouse_down(
238 editor: &mut Editor,
239 MouseButtonEvent {
240 position,
241 modifiers:
242 Modifiers {
243 shift,
244 ctrl,
245 alt,
246 cmd,
247 ..
248 },
249 mut click_count,
250 ..
251 }: MouseButtonEvent,
252 position_map: &PositionMap,
253 text_bounds: RectF,
254 gutter_bounds: RectF,
255 cx: &mut EventContext<Editor>,
256 ) -> bool {
257 if gutter_bounds.contains_point(position) {
258 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
259 } else if !text_bounds.contains_point(position) {
260 return false;
261 }
262
263 let (position, target_position) = position_map.point_for_position(text_bounds, position);
264
265 if shift && alt {
266 editor.select(
267 SelectPhase::BeginColumnar {
268 position,
269 goal_column: target_position.column(),
270 },
271 cx,
272 );
273 } else if shift && !ctrl && !alt && !cmd {
274 editor.select(
275 SelectPhase::Extend {
276 position,
277 click_count,
278 },
279 cx,
280 );
281 } else {
282 editor.select(
283 SelectPhase::Begin {
284 position,
285 add: alt,
286 click_count,
287 },
288 cx,
289 );
290 }
291
292 true
293 }
294
295 fn mouse_right_down(
296 editor: &mut Editor,
297 position: Vector2F,
298 position_map: &PositionMap,
299 text_bounds: RectF,
300 cx: &mut EventContext<Editor>,
301 ) -> bool {
302 if !text_bounds.contains_point(position) {
303 return false;
304 }
305
306 let (point, _) = position_map.point_for_position(text_bounds, position);
307 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
308 true
309 }
310
311 fn mouse_up(
312 editor: &mut Editor,
313 position: Vector2F,
314 cmd: bool,
315 shift: bool,
316 alt: bool,
317 position_map: &PositionMap,
318 text_bounds: RectF,
319 cx: &mut EventContext<Editor>,
320 ) -> bool {
321 let end_selection = editor.has_pending_selection();
322 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
323
324 if end_selection {
325 editor.select(SelectPhase::End, cx);
326 }
327
328 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
329 let (point, target_point) = position_map.point_for_position(text_bounds, position);
330
331 if point == target_point {
332 if shift {
333 go_to_fetched_type_definition(editor, point, alt, cx);
334 } else {
335 go_to_fetched_definition(editor, point, alt, cx);
336 }
337
338 return true;
339 }
340 }
341
342 end_selection
343 }
344
345 fn mouse_dragged(
346 editor: &mut Editor,
347 MouseMovedEvent {
348 modifiers: Modifiers { cmd, shift, .. },
349 position,
350 ..
351 }: MouseMovedEvent,
352 position_map: &PositionMap,
353 text_bounds: RectF,
354 cx: &mut EventContext<Editor>,
355 ) -> bool {
356 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
357 // Don't trigger hover popover if mouse is hovering over context menu
358 let point = if text_bounds.contains_point(position) {
359 let (point, target_point) = position_map.point_for_position(text_bounds, position);
360 if point == target_point {
361 Some(point)
362 } else {
363 None
364 }
365 } else {
366 None
367 };
368
369 update_go_to_definition_link(editor, point, cmd, shift, cx);
370
371 if editor.has_pending_selection() {
372 let mut scroll_delta = Vector2F::zero();
373
374 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
375 let top = text_bounds.origin_y() + vertical_margin;
376 let bottom = text_bounds.lower_left().y() - vertical_margin;
377 if position.y() < top {
378 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
379 }
380 if position.y() > bottom {
381 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
382 }
383
384 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
385 let left = text_bounds.origin_x() + horizontal_margin;
386 let right = text_bounds.upper_right().x() - horizontal_margin;
387 if position.x() < left {
388 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
389 left - position.x(),
390 ))
391 }
392 if position.x() > right {
393 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
394 position.x() - right,
395 ))
396 }
397
398 let (position, target_position) =
399 position_map.point_for_position(text_bounds, position);
400
401 editor.select(
402 SelectPhase::Update {
403 position,
404 goal_column: target_position.column(),
405 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
406 .clamp(Vector2F::zero(), position_map.scroll_max),
407 },
408 cx,
409 );
410 hover_at(editor, point, cx);
411 true
412 } else {
413 hover_at(editor, point, cx);
414 false
415 }
416 }
417
418 fn mouse_moved(
419 editor: &mut Editor,
420 MouseMovedEvent {
421 modifiers: Modifiers { shift, cmd, .. },
422 position,
423 ..
424 }: MouseMovedEvent,
425 position_map: &PositionMap,
426 text_bounds: RectF,
427 cx: &mut ViewContext<Editor>,
428 ) -> bool {
429 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
430 // Don't trigger hover popover if mouse is hovering over context menu
431 let point = position_to_display_point(position, text_bounds, position_map);
432
433 update_go_to_definition_link(editor, point, cmd, shift, cx);
434 hover_at(editor, point, cx);
435
436 true
437 }
438
439 fn scroll(
440 editor: &mut Editor,
441 position: Vector2F,
442 mut delta: Vector2F,
443 precise: bool,
444 position_map: &PositionMap,
445 bounds: RectF,
446 cx: &mut ViewContext<Editor>,
447 ) -> bool {
448 if !bounds.contains_point(position) {
449 return false;
450 }
451
452 let line_height = position_map.line_height;
453 let max_glyph_width = position_map.em_width;
454
455 let axis = if precise {
456 //Trackpad
457 position_map.snapshot.ongoing_scroll.filter(&mut delta)
458 } else {
459 //Not trackpad
460 delta *= vec2f(max_glyph_width, line_height);
461 None //Resets ongoing scroll
462 };
463
464 let scroll_position = position_map.snapshot.scroll_position();
465 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
466 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
467 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
468 editor.scroll(scroll_position, axis, cx);
469
470 true
471 }
472
473 fn paint_background(
474 &self,
475 scene: &mut SceneBuilder,
476 gutter_bounds: RectF,
477 text_bounds: RectF,
478 layout: &LayoutState,
479 ) {
480 let bounds = gutter_bounds.union_rect(text_bounds);
481 let scroll_top =
482 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
483 scene.push_quad(Quad {
484 bounds: gutter_bounds,
485 background: Some(self.style.gutter_background),
486 border: Border::new(0., Color::transparent_black()),
487 corner_radius: 0.,
488 });
489 scene.push_quad(Quad {
490 bounds: text_bounds,
491 background: Some(self.style.background),
492 border: Border::new(0., Color::transparent_black()),
493 corner_radius: 0.,
494 });
495
496 if let EditorMode::Full = layout.mode {
497 let mut active_rows = layout.active_rows.iter().peekable();
498 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
499 let mut end_row = *start_row;
500 while active_rows.peek().map_or(false, |r| {
501 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
502 }) {
503 active_rows.next().unwrap();
504 end_row += 1;
505 }
506
507 if !contains_non_empty_selection {
508 let origin = vec2f(
509 bounds.origin_x(),
510 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
511 - scroll_top,
512 );
513 let size = vec2f(
514 bounds.width(),
515 layout.position_map.line_height * (end_row - start_row + 1) as f32,
516 );
517 scene.push_quad(Quad {
518 bounds: RectF::new(origin, size),
519 background: Some(self.style.active_line_background),
520 border: Border::default(),
521 corner_radius: 0.,
522 });
523 }
524 }
525
526 if let Some(highlighted_rows) = &layout.highlighted_rows {
527 let origin = vec2f(
528 bounds.origin_x(),
529 bounds.origin_y()
530 + (layout.position_map.line_height * highlighted_rows.start as f32)
531 - scroll_top,
532 );
533 let size = vec2f(
534 bounds.width(),
535 layout.position_map.line_height * highlighted_rows.len() as f32,
536 );
537 scene.push_quad(Quad {
538 bounds: RectF::new(origin, size),
539 background: Some(self.style.highlighted_line_background),
540 border: Border::default(),
541 corner_radius: 0.,
542 });
543 }
544 }
545 }
546
547 fn paint_gutter(
548 &mut self,
549 scene: &mut SceneBuilder,
550 bounds: RectF,
551 visible_bounds: RectF,
552 layout: &mut LayoutState,
553 editor: &mut Editor,
554 cx: &mut ViewContext<Editor>,
555 ) {
556 let line_height = layout.position_map.line_height;
557
558 let scroll_position = layout.position_map.snapshot.scroll_position();
559 let scroll_top = scroll_position.y() * line_height;
560
561 let show_gutter = matches!(
562 settings::get::<ProjectSettings>(cx).git.git_gutter,
563 Some(GitGutterSetting::TrackedFiles)
564 );
565
566 if show_gutter {
567 Self::paint_diff_hunks(scene, bounds, layout, cx);
568 }
569
570 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
571 if let Some(line) = line {
572 let line_origin = bounds.origin()
573 + vec2f(
574 bounds.width() - line.width() - layout.gutter_padding,
575 ix as f32 * line_height - (scroll_top % line_height),
576 );
577
578 line.paint(scene, line_origin, visible_bounds, line_height, cx);
579 }
580 }
581
582 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
583 if let Some(indicator) = fold_indicator.as_mut() {
584 let position = vec2f(
585 bounds.width() - layout.gutter_padding,
586 ix as f32 * line_height - (scroll_top % line_height),
587 );
588 let centering_offset = vec2f(
589 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
590 (line_height - indicator.size().y()) / 2.,
591 );
592
593 let indicator_origin = bounds.origin() + position + centering_offset;
594
595 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
596 }
597 }
598
599 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
600 let mut x = 0.;
601 let mut y = *row as f32 * line_height - scroll_top;
602 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
603 y += (line_height - indicator.size().y()) / 2.;
604 indicator.paint(
605 scene,
606 bounds.origin() + vec2f(x, y),
607 visible_bounds,
608 editor,
609 cx,
610 );
611 }
612 }
613
614 fn paint_diff_hunks(
615 scene: &mut SceneBuilder,
616 bounds: RectF,
617 layout: &mut LayoutState,
618 cx: &mut ViewContext<Editor>,
619 ) {
620 let diff_style = &theme::current(cx).editor.diff.clone();
621 let line_height = layout.position_map.line_height;
622
623 let scroll_position = layout.position_map.snapshot.scroll_position();
624 let scroll_top = scroll_position.y() * line_height;
625
626 for hunk in &layout.display_hunks {
627 let (display_row_range, status) = match hunk {
628 //TODO: This rendering is entirely a horrible hack
629 &DisplayDiffHunk::Folded { display_row: row } => {
630 let start_y = row as f32 * line_height - scroll_top;
631 let end_y = start_y + line_height;
632
633 let width = diff_style.removed_width_em * line_height;
634 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
635 let highlight_size = vec2f(width * 2., end_y - start_y);
636 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
637
638 scene.push_quad(Quad {
639 bounds: highlight_bounds,
640 background: Some(diff_style.modified),
641 border: Border::new(0., Color::transparent_black()),
642 corner_radius: 1. * line_height,
643 });
644
645 continue;
646 }
647
648 DisplayDiffHunk::Unfolded {
649 display_row_range,
650 status,
651 } => (display_row_range, status),
652 };
653
654 let color = match status {
655 DiffHunkStatus::Added => diff_style.inserted,
656 DiffHunkStatus::Modified => diff_style.modified,
657
658 //TODO: This rendering is entirely a horrible hack
659 DiffHunkStatus::Removed => {
660 let row = display_row_range.start;
661
662 let offset = line_height / 2.;
663 let start_y = row as f32 * line_height - offset - scroll_top;
664 let end_y = start_y + line_height;
665
666 let width = diff_style.removed_width_em * line_height;
667 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
668 let highlight_size = vec2f(width * 2., end_y - start_y);
669 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
670
671 scene.push_quad(Quad {
672 bounds: highlight_bounds,
673 background: Some(diff_style.deleted),
674 border: Border::new(0., Color::transparent_black()),
675 corner_radius: 1. * line_height,
676 });
677
678 continue;
679 }
680 };
681
682 let start_row = display_row_range.start;
683 let end_row = display_row_range.end;
684
685 let start_y = start_row as f32 * line_height - scroll_top;
686 let end_y = end_row as f32 * line_height - scroll_top;
687
688 let width = diff_style.width_em * line_height;
689 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
690 let highlight_size = vec2f(width * 2., end_y - start_y);
691 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
692
693 scene.push_quad(Quad {
694 bounds: highlight_bounds,
695 background: Some(color),
696 border: Border::new(0., Color::transparent_black()),
697 corner_radius: diff_style.corner_radius * line_height,
698 });
699 }
700 }
701
702 fn paint_text(
703 &mut self,
704 scene: &mut SceneBuilder,
705 bounds: RectF,
706 visible_bounds: RectF,
707 layout: &mut LayoutState,
708 editor: &mut Editor,
709 cx: &mut ViewContext<Editor>,
710 ) {
711 let style = &self.style;
712 let local_replica_id = editor.replica_id(cx);
713 let scroll_position = layout.position_map.snapshot.scroll_position();
714 let start_row = layout.visible_display_row_range.start;
715 let scroll_top = scroll_position.y() * layout.position_map.line_height;
716 let max_glyph_width = layout.position_map.em_width;
717 let scroll_left = scroll_position.x() * max_glyph_width;
718 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
719 let line_end_overshoot = 0.15 * layout.position_map.line_height;
720 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
721
722 scene.push_layer(Some(bounds));
723
724 scene.push_cursor_region(CursorRegion {
725 bounds,
726 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
727 CursorStyle::PointingHand
728 } else {
729 CursorStyle::IBeam
730 },
731 });
732
733 let fold_corner_radius =
734 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
735 for (id, range, color) in layout.fold_ranges.iter() {
736 self.paint_highlighted_range(
737 scene,
738 range.clone(),
739 *color,
740 fold_corner_radius,
741 fold_corner_radius * 2.,
742 layout,
743 content_origin,
744 scroll_top,
745 scroll_left,
746 bounds,
747 );
748
749 for bound in range_to_bounds(
750 &range,
751 content_origin,
752 scroll_left,
753 scroll_top,
754 &layout.visible_display_row_range,
755 line_end_overshoot,
756 &layout.position_map,
757 ) {
758 scene.push_cursor_region(CursorRegion {
759 bounds: bound,
760 style: CursorStyle::PointingHand,
761 });
762
763 let display_row = range.start.row();
764
765 let buffer_row = DisplayPoint::new(display_row, 0)
766 .to_point(&layout.position_map.snapshot.display_snapshot)
767 .row;
768
769 scene.push_mouse_region(
770 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
771 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
772 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
773 })
774 .with_notify_on_hover(true)
775 .with_notify_on_click(true),
776 )
777 }
778 }
779
780 for (range, color) in &layout.highlighted_ranges {
781 self.paint_highlighted_range(
782 scene,
783 range.clone(),
784 *color,
785 0.,
786 line_end_overshoot,
787 layout,
788 content_origin,
789 scroll_top,
790 scroll_left,
791 bounds,
792 );
793 }
794
795 let mut cursors = SmallVec::<[Cursor; 32]>::new();
796 let corner_radius = 0.15 * layout.position_map.line_height;
797 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
798
799 for (replica_id, selections) in &layout.selections {
800 let replica_id = *replica_id;
801 let selection_style = style.replica_selection_style(replica_id);
802
803 for selection in selections {
804 if !selection.range.is_empty()
805 && (replica_id == local_replica_id
806 || Some(replica_id) == editor.leader_replica_id)
807 {
808 invisible_display_ranges.push(selection.range.clone());
809 }
810 self.paint_highlighted_range(
811 scene,
812 selection.range.clone(),
813 selection_style.selection,
814 corner_radius,
815 corner_radius * 2.,
816 layout,
817 content_origin,
818 scroll_top,
819 scroll_left,
820 bounds,
821 );
822
823 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
824 let cursor_position = selection.head;
825 if layout
826 .visible_display_row_range
827 .contains(&cursor_position.row())
828 {
829 let cursor_row_layout = &layout.position_map.line_layouts
830 [(cursor_position.row() - start_row) as usize]
831 .line;
832 let cursor_column = cursor_position.column() as usize;
833
834 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
835 let mut block_width =
836 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
837 if block_width == 0.0 {
838 block_width = layout.position_map.em_width;
839 }
840 let block_text = if let CursorShape::Block = selection.cursor_shape {
841 layout
842 .position_map
843 .snapshot
844 .chars_at(cursor_position)
845 .next()
846 .and_then(|(character, _)| {
847 let font_id =
848 cursor_row_layout.font_for_index(cursor_column)?;
849 let text = character.to_string();
850
851 Some(cx.text_layout_cache().layout_str(
852 &text,
853 cursor_row_layout.font_size(),
854 &[(
855 text.len(),
856 RunStyle {
857 font_id,
858 color: style.background,
859 underline: Default::default(),
860 },
861 )],
862 ))
863 })
864 } else {
865 None
866 };
867
868 let x = cursor_character_x - scroll_left;
869 let y = cursor_position.row() as f32 * layout.position_map.line_height
870 - scroll_top;
871 if selection.is_newest {
872 editor.pixel_position_of_newest_cursor = Some(vec2f(
873 bounds.origin_x() + x + block_width / 2.,
874 bounds.origin_y() + y + layout.position_map.line_height / 2.,
875 ));
876 }
877 cursors.push(Cursor {
878 color: selection_style.cursor,
879 block_width,
880 origin: vec2f(x, y),
881 line_height: layout.position_map.line_height,
882 shape: selection.cursor_shape,
883 block_text,
884 });
885 }
886 }
887 }
888 }
889
890 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
891 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
892 let row = start_row + ix as u32;
893 line_with_invisibles.draw(
894 layout,
895 row,
896 scroll_top,
897 scene,
898 content_origin,
899 scroll_left,
900 visible_text_bounds,
901 whitespace_setting,
902 &invisible_display_ranges,
903 visible_bounds,
904 cx,
905 )
906 }
907 }
908
909 scene.paint_layer(Some(bounds), |scene| {
910 for cursor in cursors {
911 cursor.paint(scene, content_origin, cx);
912 }
913 });
914
915 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
916 scene.push_stacking_context(None, None);
917 let cursor_row_layout =
918 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
919 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
920 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
921 let mut list_origin = content_origin + vec2f(x, y);
922 let list_width = context_menu.size().x();
923 let list_height = context_menu.size().y();
924
925 // Snap the right edge of the list to the right edge of the window if
926 // its horizontal bounds overflow.
927 if list_origin.x() + list_width > cx.window_size().x() {
928 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
929 }
930
931 if list_origin.y() + list_height > bounds.max_y() {
932 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
933 }
934
935 context_menu.paint(
936 scene,
937 list_origin,
938 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
939 editor,
940 cx,
941 );
942
943 scene.pop_stacking_context();
944 }
945
946 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
947 scene.push_stacking_context(None, None);
948
949 // This is safe because we check on layout whether the required row is available
950 let hovered_row_layout =
951 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
952
953 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
954 // height. This is the size we will use to decide whether to render popovers above or below
955 // the hovered line.
956 let first_size = hover_popovers[0].size();
957 let height_to_reserve = first_size.y()
958 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
959
960 // Compute Hovered Point
961 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
962 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
963 let hovered_point = content_origin + vec2f(x, y);
964
965 if hovered_point.y() - height_to_reserve > 0.0 {
966 // There is enough space above. Render popovers above the hovered point
967 let mut current_y = hovered_point.y();
968 for hover_popover in hover_popovers {
969 let size = hover_popover.size();
970 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
971
972 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
973 if x_out_of_bounds < 0.0 {
974 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
975 }
976
977 hover_popover.paint(
978 scene,
979 popover_origin,
980 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
981 editor,
982 cx,
983 );
984
985 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
986 }
987 } else {
988 // There is not enough space above. Render popovers below the hovered point
989 let mut current_y = hovered_point.y() + layout.position_map.line_height;
990 for hover_popover in hover_popovers {
991 let size = hover_popover.size();
992 let mut popover_origin = vec2f(hovered_point.x(), current_y);
993
994 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
995 if x_out_of_bounds < 0.0 {
996 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
997 }
998
999 hover_popover.paint(
1000 scene,
1001 popover_origin,
1002 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1003 editor,
1004 cx,
1005 );
1006
1007 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1008 }
1009 }
1010
1011 scene.pop_stacking_context();
1012 }
1013
1014 scene.pop_layer();
1015 }
1016
1017 fn paint_scrollbar(
1018 &mut self,
1019 scene: &mut SceneBuilder,
1020 bounds: RectF,
1021 layout: &mut LayoutState,
1022 cx: &mut ViewContext<Editor>,
1023 editor: &Editor,
1024 ) {
1025 enum ScrollbarMouseHandlers {}
1026 if layout.mode != EditorMode::Full {
1027 return;
1028 }
1029
1030 let style = &self.style.theme.scrollbar;
1031
1032 let top = bounds.min_y();
1033 let bottom = bounds.max_y();
1034 let right = bounds.max_x();
1035 let left = right - style.width;
1036 let row_range = &layout.scrollbar_row_range;
1037 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1038
1039 let mut height = bounds.height();
1040 let mut first_row_y_offset = 0.0;
1041
1042 // Impose a minimum height on the scrollbar thumb
1043 let row_height = height / max_row;
1044 let min_thumb_height =
1045 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1046 let thumb_height = (row_range.end - row_range.start) * row_height;
1047 if thumb_height < min_thumb_height {
1048 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1049 height -= min_thumb_height - thumb_height;
1050 }
1051
1052 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1053
1054 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1055 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1056 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1057 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1058
1059 if layout.show_scrollbars {
1060 scene.push_quad(Quad {
1061 bounds: track_bounds,
1062 border: style.track.border,
1063 background: style.track.background_color,
1064 ..Default::default()
1065 });
1066 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1067 let theme = theme::current(cx);
1068 let scrollbar_theme = &theme.editor.scrollbar;
1069 if layout.is_singleton && scrollbar_settings.selections {
1070 let start_anchor = Anchor::min();
1071 let end_anchor = Anchor::max();
1072 let mut start_row = None;
1073 let mut end_row = None;
1074 let color = scrollbar_theme.selections;
1075 let border = Border {
1076 width: 1.,
1077 color: style.thumb.border.color,
1078 overlay: false,
1079 top: false,
1080 right: true,
1081 bottom: false,
1082 left: true,
1083 };
1084 let mut push_region = |start, end| {
1085 if let (Some(start_display), Some(end_display)) = (start, end) {
1086 let start_y = y_for_row(start_display as f32);
1087 let mut end_y = y_for_row(end_display as f32);
1088 if end_y - start_y < 1. {
1089 end_y = start_y + 1.;
1090 }
1091 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1092
1093 scene.push_quad(Quad {
1094 bounds,
1095 background: Some(color),
1096 border,
1097 corner_radius: style.thumb.corner_radius,
1098 })
1099 }
1100 };
1101 for (row, _) in &editor
1102 .background_highlights_in_range_for::<crate::items::BufferSearchHighlights>(
1103 start_anchor..end_anchor,
1104 &layout.position_map.snapshot,
1105 &theme,
1106 )
1107 {
1108 let start_display = row.start;
1109 let end_display = row.end;
1110
1111 if start_row.is_none() {
1112 assert_eq!(end_row, None);
1113 start_row = Some(start_display.row());
1114 end_row = Some(end_display.row());
1115 continue;
1116 }
1117 if let Some(current_end) = end_row.as_mut() {
1118 if start_display.row() > *current_end + 1 {
1119 push_region(start_row, end_row);
1120 start_row = Some(start_display.row());
1121 end_row = Some(end_display.row());
1122 } else {
1123 // Merge two hunks.
1124 *current_end = end_display.row();
1125 }
1126 } else {
1127 unreachable!();
1128 }
1129 }
1130 // We might still have a hunk that was not rendered (if there was a search hit on the last line)
1131 push_region(start_row, end_row);
1132 }
1133
1134 if layout.is_singleton && scrollbar_settings.git_diff {
1135 let diff_style = scrollbar_theme.git.clone();
1136 for hunk in layout
1137 .position_map
1138 .snapshot
1139 .buffer_snapshot
1140 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1141 {
1142 let start_display = Point::new(hunk.buffer_range.start, 0)
1143 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1144 let end_display = Point::new(hunk.buffer_range.end, 0)
1145 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1146 let start_y = y_for_row(start_display.row() as f32);
1147 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1148 y_for_row((end_display.row() + 1) as f32)
1149 } else {
1150 y_for_row((end_display.row()) as f32)
1151 };
1152
1153 if end_y - start_y < 1. {
1154 end_y = start_y + 1.;
1155 }
1156 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1157
1158 let color = match hunk.status() {
1159 DiffHunkStatus::Added => diff_style.inserted,
1160 DiffHunkStatus::Modified => diff_style.modified,
1161 DiffHunkStatus::Removed => diff_style.deleted,
1162 };
1163
1164 let border = Border {
1165 width: 1.,
1166 color: style.thumb.border.color,
1167 overlay: false,
1168 top: false,
1169 right: true,
1170 bottom: false,
1171 left: true,
1172 };
1173
1174 scene.push_quad(Quad {
1175 bounds,
1176 background: Some(color),
1177 border,
1178 corner_radius: style.thumb.corner_radius,
1179 })
1180 }
1181 }
1182
1183 scene.push_quad(Quad {
1184 bounds: thumb_bounds,
1185 border: style.thumb.border,
1186 background: style.thumb.background_color,
1187 corner_radius: style.thumb.corner_radius,
1188 });
1189 }
1190
1191 scene.push_cursor_region(CursorRegion {
1192 bounds: track_bounds,
1193 style: CursorStyle::Arrow,
1194 });
1195 scene.push_mouse_region(
1196 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1197 .on_move(move |event, editor: &mut Editor, cx| {
1198 if event.pressed_button.is_none() {
1199 editor.scroll_manager.show_scrollbar(cx);
1200 }
1201 })
1202 .on_down(MouseButton::Left, {
1203 let row_range = row_range.clone();
1204 move |event, editor: &mut Editor, cx| {
1205 let y = event.position.y();
1206 if y < thumb_top || thumb_bottom < y {
1207 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1208 let top_row = center_row
1209 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1210 let mut position = editor.scroll_position(cx);
1211 position.set_y(top_row as f32);
1212 editor.set_scroll_position(position, cx);
1213 } else {
1214 editor.scroll_manager.show_scrollbar(cx);
1215 }
1216 }
1217 })
1218 .on_drag(MouseButton::Left, {
1219 move |event, editor: &mut Editor, cx| {
1220 let y = event.prev_mouse_position.y();
1221 let new_y = event.position.y();
1222 if thumb_top < y && y < thumb_bottom {
1223 let mut position = editor.scroll_position(cx);
1224 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1225 if position.y() < 0.0 {
1226 position.set_y(0.);
1227 }
1228 editor.set_scroll_position(position, cx);
1229 }
1230 }
1231 }),
1232 );
1233 }
1234
1235 #[allow(clippy::too_many_arguments)]
1236 fn paint_highlighted_range(
1237 &self,
1238 scene: &mut SceneBuilder,
1239 range: Range<DisplayPoint>,
1240 color: Color,
1241 corner_radius: f32,
1242 line_end_overshoot: f32,
1243 layout: &LayoutState,
1244 content_origin: Vector2F,
1245 scroll_top: f32,
1246 scroll_left: f32,
1247 bounds: RectF,
1248 ) {
1249 let start_row = layout.visible_display_row_range.start;
1250 let end_row = layout.visible_display_row_range.end;
1251 if range.start != range.end {
1252 let row_range = if range.end.column() == 0 {
1253 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1254 } else {
1255 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1256 };
1257
1258 let highlighted_range = HighlightedRange {
1259 color,
1260 line_height: layout.position_map.line_height,
1261 corner_radius,
1262 start_y: content_origin.y()
1263 + row_range.start as f32 * layout.position_map.line_height
1264 - scroll_top,
1265 lines: row_range
1266 .into_iter()
1267 .map(|row| {
1268 let line_layout =
1269 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1270 HighlightedRangeLine {
1271 start_x: if row == range.start.row() {
1272 content_origin.x()
1273 + line_layout.x_for_index(range.start.column() as usize)
1274 - scroll_left
1275 } else {
1276 content_origin.x() - scroll_left
1277 },
1278 end_x: if row == range.end.row() {
1279 content_origin.x()
1280 + line_layout.x_for_index(range.end.column() as usize)
1281 - scroll_left
1282 } else {
1283 content_origin.x() + line_layout.width() + line_end_overshoot
1284 - scroll_left
1285 },
1286 }
1287 })
1288 .collect(),
1289 };
1290
1291 highlighted_range.paint(bounds, scene);
1292 }
1293 }
1294
1295 fn paint_blocks(
1296 &mut self,
1297 scene: &mut SceneBuilder,
1298 bounds: RectF,
1299 visible_bounds: RectF,
1300 layout: &mut LayoutState,
1301 editor: &mut Editor,
1302 cx: &mut ViewContext<Editor>,
1303 ) {
1304 let scroll_position = layout.position_map.snapshot.scroll_position();
1305 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1306 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1307
1308 for block in &mut layout.blocks {
1309 let mut origin = bounds.origin()
1310 + vec2f(
1311 0.,
1312 block.row as f32 * layout.position_map.line_height - scroll_top,
1313 );
1314 if !matches!(block.style, BlockStyle::Sticky) {
1315 origin += vec2f(-scroll_left, 0.);
1316 }
1317 block
1318 .element
1319 .paint(scene, origin, visible_bounds, editor, cx);
1320 }
1321 }
1322
1323 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1324 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1325 let style = &self.style;
1326
1327 cx.text_layout_cache()
1328 .layout_str(
1329 "1".repeat(digit_count).as_str(),
1330 style.text.font_size,
1331 &[(
1332 digit_count,
1333 RunStyle {
1334 font_id: style.text.font_id,
1335 color: Color::black(),
1336 underline: Default::default(),
1337 },
1338 )],
1339 )
1340 .width()
1341 }
1342
1343 //Folds contained in a hunk are ignored apart from shrinking visual size
1344 //If a fold contains any hunks then that fold line is marked as modified
1345 fn layout_git_gutters(
1346 &self,
1347 display_rows: Range<u32>,
1348 snapshot: &EditorSnapshot,
1349 ) -> Vec<DisplayDiffHunk> {
1350 let buffer_snapshot = &snapshot.buffer_snapshot;
1351
1352 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1353 .to_point(snapshot)
1354 .row;
1355 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1356 .to_point(snapshot)
1357 .row;
1358
1359 buffer_snapshot
1360 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1361 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1362 .dedup()
1363 .collect()
1364 }
1365
1366 fn layout_line_numbers(
1367 &self,
1368 rows: Range<u32>,
1369 active_rows: &BTreeMap<u32, bool>,
1370 is_singleton: bool,
1371 snapshot: &EditorSnapshot,
1372 cx: &ViewContext<Editor>,
1373 ) -> (
1374 Vec<Option<text_layout::Line>>,
1375 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1376 ) {
1377 let style = &self.style;
1378 let include_line_numbers = snapshot.mode == EditorMode::Full;
1379 let mut line_number_layouts = Vec::with_capacity(rows.len());
1380 let mut fold_statuses = Vec::with_capacity(rows.len());
1381 let mut line_number = String::new();
1382 for (ix, row) in snapshot
1383 .buffer_rows(rows.start)
1384 .take((rows.end - rows.start) as usize)
1385 .enumerate()
1386 {
1387 let display_row = rows.start + ix as u32;
1388 let (active, color) = if active_rows.contains_key(&display_row) {
1389 (true, style.line_number_active)
1390 } else {
1391 (false, style.line_number)
1392 };
1393 if let Some(buffer_row) = row {
1394 if include_line_numbers {
1395 line_number.clear();
1396 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1397 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1398 &line_number,
1399 style.text.font_size,
1400 &[(
1401 line_number.len(),
1402 RunStyle {
1403 font_id: style.text.font_id,
1404 color,
1405 underline: Default::default(),
1406 },
1407 )],
1408 )));
1409 fold_statuses.push(
1410 is_singleton
1411 .then(|| {
1412 snapshot
1413 .fold_for_line(buffer_row)
1414 .map(|fold_status| (fold_status, buffer_row, active))
1415 })
1416 .flatten(),
1417 )
1418 }
1419 } else {
1420 fold_statuses.push(None);
1421 line_number_layouts.push(None);
1422 }
1423 }
1424
1425 (line_number_layouts, fold_statuses)
1426 }
1427
1428 fn layout_lines(
1429 &mut self,
1430 rows: Range<u32>,
1431 line_number_layouts: &[Option<Line>],
1432 snapshot: &EditorSnapshot,
1433 cx: &ViewContext<Editor>,
1434 ) -> Vec<LineWithInvisibles> {
1435 if rows.start >= rows.end {
1436 return Vec::new();
1437 }
1438
1439 // When the editor is empty and unfocused, then show the placeholder.
1440 if snapshot.is_empty() {
1441 let placeholder_style = self
1442 .style
1443 .placeholder_text
1444 .as_ref()
1445 .unwrap_or(&self.style.text);
1446 let placeholder_text = snapshot.placeholder_text();
1447 let placeholder_lines = placeholder_text
1448 .as_ref()
1449 .map_or("", AsRef::as_ref)
1450 .split('\n')
1451 .skip(rows.start as usize)
1452 .chain(iter::repeat(""))
1453 .take(rows.len());
1454 placeholder_lines
1455 .map(|line| {
1456 cx.text_layout_cache().layout_str(
1457 line,
1458 placeholder_style.font_size,
1459 &[(
1460 line.len(),
1461 RunStyle {
1462 font_id: placeholder_style.font_id,
1463 color: placeholder_style.color,
1464 underline: Default::default(),
1465 },
1466 )],
1467 )
1468 })
1469 .map(|line| LineWithInvisibles {
1470 line,
1471 invisibles: Vec::new(),
1472 })
1473 .collect()
1474 } else {
1475 let style = &self.style;
1476 let chunks = snapshot
1477 .chunks(
1478 rows.clone(),
1479 true,
1480 Some(style.theme.hint),
1481 Some(style.theme.suggestion),
1482 )
1483 .map(|chunk| {
1484 let mut highlight_style = chunk
1485 .syntax_highlight_id
1486 .and_then(|id| id.style(&style.syntax));
1487
1488 if let Some(chunk_highlight) = chunk.highlight_style {
1489 if let Some(highlight_style) = highlight_style.as_mut() {
1490 highlight_style.highlight(chunk_highlight);
1491 } else {
1492 highlight_style = Some(chunk_highlight);
1493 }
1494 }
1495
1496 let mut diagnostic_highlight = HighlightStyle::default();
1497
1498 if chunk.is_unnecessary {
1499 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1500 }
1501
1502 if let Some(severity) = chunk.diagnostic_severity {
1503 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1504 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1505 let diagnostic_style = super::diagnostic_style(severity, true, style);
1506 diagnostic_highlight.underline = Some(Underline {
1507 color: Some(diagnostic_style.message.text.color),
1508 thickness: 1.0.into(),
1509 squiggly: true,
1510 });
1511 }
1512 }
1513
1514 if let Some(highlight_style) = highlight_style.as_mut() {
1515 highlight_style.highlight(diagnostic_highlight);
1516 } else {
1517 highlight_style = Some(diagnostic_highlight);
1518 }
1519
1520 HighlightedChunk {
1521 chunk: chunk.text,
1522 style: highlight_style,
1523 is_tab: chunk.is_tab,
1524 }
1525 });
1526
1527 LineWithInvisibles::from_chunks(
1528 chunks,
1529 &style.text,
1530 cx.text_layout_cache(),
1531 cx.font_cache(),
1532 MAX_LINE_LEN,
1533 rows.len() as usize,
1534 line_number_layouts,
1535 snapshot.mode,
1536 )
1537 }
1538 }
1539
1540 #[allow(clippy::too_many_arguments)]
1541 fn layout_blocks(
1542 &mut self,
1543 rows: Range<u32>,
1544 snapshot: &EditorSnapshot,
1545 editor_width: f32,
1546 scroll_width: f32,
1547 gutter_padding: f32,
1548 gutter_width: f32,
1549 em_width: f32,
1550 text_x: f32,
1551 line_height: f32,
1552 style: &EditorStyle,
1553 line_layouts: &[LineWithInvisibles],
1554 editor: &mut Editor,
1555 cx: &mut LayoutContext<Editor>,
1556 ) -> (f32, Vec<BlockLayout>) {
1557 let mut block_id = 0;
1558 let scroll_x = snapshot.scroll_anchor.offset.x();
1559 let (fixed_blocks, non_fixed_blocks) = snapshot
1560 .blocks_in_range(rows.clone())
1561 .partition::<Vec<_>, _>(|(_, block)| match block {
1562 TransformBlock::ExcerptHeader { .. } => false,
1563 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1564 });
1565 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1566 let mut element = match block {
1567 TransformBlock::Custom(block) => {
1568 let align_to = block
1569 .position()
1570 .to_point(&snapshot.buffer_snapshot)
1571 .to_display_point(snapshot);
1572 let anchor_x = text_x
1573 + if rows.contains(&align_to.row()) {
1574 line_layouts[(align_to.row() - rows.start) as usize]
1575 .line
1576 .x_for_index(align_to.column() as usize)
1577 } else {
1578 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1579 .x_for_index(align_to.column() as usize)
1580 };
1581
1582 block.render(&mut BlockContext {
1583 view_context: cx,
1584 anchor_x,
1585 gutter_padding,
1586 line_height,
1587 scroll_x,
1588 gutter_width,
1589 em_width,
1590 block_id,
1591 })
1592 }
1593 TransformBlock::ExcerptHeader {
1594 id,
1595 buffer,
1596 range,
1597 starts_new_buffer,
1598 ..
1599 } => {
1600 let tooltip_style = theme::current(cx).tooltip.clone();
1601 let include_root = editor
1602 .project
1603 .as_ref()
1604 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1605 .unwrap_or_default();
1606 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1607 let jump_path = ProjectPath {
1608 worktree_id: file.worktree_id(cx),
1609 path: file.path.clone(),
1610 };
1611 let jump_anchor = range
1612 .primary
1613 .as_ref()
1614 .map_or(range.context.start, |primary| primary.start);
1615 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1616
1617 enum JumpIcon {}
1618 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1619 let style = style.jump_icon.style_for(state);
1620 Svg::new("icons/arrow_up_right_8.svg")
1621 .with_color(style.color)
1622 .constrained()
1623 .with_width(style.icon_width)
1624 .aligned()
1625 .contained()
1626 .with_style(style.container)
1627 .constrained()
1628 .with_width(style.button_width)
1629 .with_height(style.button_width)
1630 })
1631 .with_cursor_style(CursorStyle::PointingHand)
1632 .on_click(MouseButton::Left, move |_, editor, cx| {
1633 if let Some(workspace) = editor
1634 .workspace
1635 .as_ref()
1636 .and_then(|(workspace, _)| workspace.upgrade(cx))
1637 {
1638 workspace.update(cx, |workspace, cx| {
1639 Editor::jump(
1640 workspace,
1641 jump_path.clone(),
1642 jump_position,
1643 jump_anchor,
1644 cx,
1645 );
1646 });
1647 }
1648 })
1649 .with_tooltip::<JumpIcon>(
1650 (*id).into(),
1651 "Jump to Buffer".to_string(),
1652 Some(Box::new(crate::OpenExcerpts)),
1653 tooltip_style.clone(),
1654 cx,
1655 )
1656 .aligned()
1657 .flex_float()
1658 });
1659
1660 if *starts_new_buffer {
1661 let editor_font_size = style.text.font_size;
1662 let style = &style.diagnostic_path_header;
1663 let font_size = (style.text_scale_factor * editor_font_size).round();
1664
1665 let path = buffer.resolve_file_path(cx, include_root);
1666 let mut filename = None;
1667 let mut parent_path = None;
1668 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1669 if let Some(path) = path {
1670 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1671 parent_path =
1672 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1673 }
1674
1675 Flex::row()
1676 .with_child(
1677 Label::new(
1678 filename.unwrap_or_else(|| "untitled".to_string()),
1679 style.filename.text.clone().with_font_size(font_size),
1680 )
1681 .contained()
1682 .with_style(style.filename.container)
1683 .aligned(),
1684 )
1685 .with_children(parent_path.map(|path| {
1686 Label::new(path, style.path.text.clone().with_font_size(font_size))
1687 .contained()
1688 .with_style(style.path.container)
1689 .aligned()
1690 }))
1691 .with_children(jump_icon)
1692 .contained()
1693 .with_style(style.container)
1694 .with_padding_left(gutter_padding)
1695 .with_padding_right(gutter_padding)
1696 .expanded()
1697 .into_any_named("path header block")
1698 } else {
1699 let text_style = style.text.clone();
1700 Flex::row()
1701 .with_child(Label::new("⋯", text_style))
1702 .with_children(jump_icon)
1703 .contained()
1704 .with_padding_left(gutter_padding)
1705 .with_padding_right(gutter_padding)
1706 .expanded()
1707 .into_any_named("collapsed context")
1708 }
1709 }
1710 };
1711
1712 element.layout(
1713 SizeConstraint {
1714 min: Vector2F::zero(),
1715 max: vec2f(width, block.height() as f32 * line_height),
1716 },
1717 editor,
1718 cx,
1719 );
1720 element
1721 };
1722
1723 let mut fixed_block_max_width = 0f32;
1724 let mut blocks = Vec::new();
1725 for (row, block) in fixed_blocks {
1726 let element = render_block(block, f32::INFINITY, block_id);
1727 block_id += 1;
1728 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1729 blocks.push(BlockLayout {
1730 row,
1731 element,
1732 style: BlockStyle::Fixed,
1733 });
1734 }
1735 for (row, block) in non_fixed_blocks {
1736 let style = match block {
1737 TransformBlock::Custom(block) => block.style(),
1738 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1739 };
1740 let width = match style {
1741 BlockStyle::Sticky => editor_width,
1742 BlockStyle::Flex => editor_width
1743 .max(fixed_block_max_width)
1744 .max(gutter_width + scroll_width),
1745 BlockStyle::Fixed => unreachable!(),
1746 };
1747 let element = render_block(block, width, block_id);
1748 block_id += 1;
1749 blocks.push(BlockLayout {
1750 row,
1751 element,
1752 style,
1753 });
1754 }
1755 (
1756 scroll_width.max(fixed_block_max_width - gutter_width),
1757 blocks,
1758 )
1759 }
1760}
1761
1762struct HighlightedChunk<'a> {
1763 chunk: &'a str,
1764 style: Option<HighlightStyle>,
1765 is_tab: bool,
1766}
1767
1768#[derive(Debug)]
1769pub struct LineWithInvisibles {
1770 pub line: Line,
1771 invisibles: Vec<Invisible>,
1772}
1773
1774impl LineWithInvisibles {
1775 fn from_chunks<'a>(
1776 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1777 text_style: &TextStyle,
1778 text_layout_cache: &TextLayoutCache,
1779 font_cache: &Arc<FontCache>,
1780 max_line_len: usize,
1781 max_line_count: usize,
1782 line_number_layouts: &[Option<Line>],
1783 editor_mode: EditorMode,
1784 ) -> Vec<Self> {
1785 let mut layouts = Vec::with_capacity(max_line_count);
1786 let mut line = String::new();
1787 let mut invisibles = Vec::new();
1788 let mut styles = Vec::new();
1789 let mut non_whitespace_added = false;
1790 let mut row = 0;
1791 let mut line_exceeded_max_len = false;
1792 for highlighted_chunk in chunks.chain([HighlightedChunk {
1793 chunk: "\n",
1794 style: None,
1795 is_tab: false,
1796 }]) {
1797 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1798 if ix > 0 {
1799 layouts.push(Self {
1800 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1801 invisibles: invisibles.drain(..).collect(),
1802 });
1803
1804 line.clear();
1805 styles.clear();
1806 row += 1;
1807 line_exceeded_max_len = false;
1808 non_whitespace_added = false;
1809 if row == max_line_count {
1810 return layouts;
1811 }
1812 }
1813
1814 if !line_chunk.is_empty() && !line_exceeded_max_len {
1815 let text_style = if let Some(style) = highlighted_chunk.style {
1816 text_style
1817 .clone()
1818 .highlight(style, font_cache)
1819 .map(Cow::Owned)
1820 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1821 } else {
1822 Cow::Borrowed(text_style)
1823 };
1824
1825 if line.len() + line_chunk.len() > max_line_len {
1826 let mut chunk_len = max_line_len - line.len();
1827 while !line_chunk.is_char_boundary(chunk_len) {
1828 chunk_len -= 1;
1829 }
1830 line_chunk = &line_chunk[..chunk_len];
1831 line_exceeded_max_len = true;
1832 }
1833
1834 styles.push((
1835 line_chunk.len(),
1836 RunStyle {
1837 font_id: text_style.font_id,
1838 color: text_style.color,
1839 underline: text_style.underline,
1840 },
1841 ));
1842
1843 if editor_mode == EditorMode::Full {
1844 // Line wrap pads its contents with fake whitespaces,
1845 // avoid printing them
1846 let inside_wrapped_string = line_number_layouts
1847 .get(row)
1848 .and_then(|layout| layout.as_ref())
1849 .is_none();
1850 if highlighted_chunk.is_tab {
1851 if non_whitespace_added || !inside_wrapped_string {
1852 invisibles.push(Invisible::Tab {
1853 line_start_offset: line.len(),
1854 });
1855 }
1856 } else {
1857 invisibles.extend(
1858 line_chunk
1859 .chars()
1860 .enumerate()
1861 .filter(|(_, line_char)| {
1862 let is_whitespace = line_char.is_whitespace();
1863 non_whitespace_added |= !is_whitespace;
1864 is_whitespace
1865 && (non_whitespace_added || !inside_wrapped_string)
1866 })
1867 .map(|(whitespace_index, _)| Invisible::Whitespace {
1868 line_offset: line.len() + whitespace_index,
1869 }),
1870 )
1871 }
1872 }
1873
1874 line.push_str(line_chunk);
1875 }
1876 }
1877 }
1878
1879 layouts
1880 }
1881
1882 fn draw(
1883 &self,
1884 layout: &LayoutState,
1885 row: u32,
1886 scroll_top: f32,
1887 scene: &mut SceneBuilder,
1888 content_origin: Vector2F,
1889 scroll_left: f32,
1890 visible_text_bounds: RectF,
1891 whitespace_setting: ShowWhitespaceSetting,
1892 selection_ranges: &[Range<DisplayPoint>],
1893 visible_bounds: RectF,
1894 cx: &mut ViewContext<Editor>,
1895 ) {
1896 let line_height = layout.position_map.line_height;
1897 let line_y = row as f32 * line_height - scroll_top;
1898
1899 self.line.paint(
1900 scene,
1901 content_origin + vec2f(-scroll_left, line_y),
1902 visible_text_bounds,
1903 line_height,
1904 cx,
1905 );
1906
1907 self.draw_invisibles(
1908 &selection_ranges,
1909 layout,
1910 content_origin,
1911 scroll_left,
1912 line_y,
1913 row,
1914 scene,
1915 visible_bounds,
1916 line_height,
1917 whitespace_setting,
1918 cx,
1919 );
1920 }
1921
1922 fn draw_invisibles(
1923 &self,
1924 selection_ranges: &[Range<DisplayPoint>],
1925 layout: &LayoutState,
1926 content_origin: Vector2F,
1927 scroll_left: f32,
1928 line_y: f32,
1929 row: u32,
1930 scene: &mut SceneBuilder,
1931 visible_bounds: RectF,
1932 line_height: f32,
1933 whitespace_setting: ShowWhitespaceSetting,
1934 cx: &mut ViewContext<Editor>,
1935 ) {
1936 let allowed_invisibles_regions = match whitespace_setting {
1937 ShowWhitespaceSetting::None => return,
1938 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1939 ShowWhitespaceSetting::All => None,
1940 };
1941
1942 for invisible in &self.invisibles {
1943 let (&token_offset, invisible_symbol) = match invisible {
1944 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1945 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1946 };
1947
1948 let x_offset = self.line.x_for_index(token_offset);
1949 let invisible_offset =
1950 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1951 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1952
1953 if let Some(allowed_regions) = allowed_invisibles_regions {
1954 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1955 if !allowed_regions
1956 .iter()
1957 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1958 {
1959 continue;
1960 }
1961 }
1962 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1963 }
1964 }
1965}
1966
1967#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1968enum Invisible {
1969 Tab { line_start_offset: usize },
1970 Whitespace { line_offset: usize },
1971}
1972
1973impl Element<Editor> for EditorElement {
1974 type LayoutState = LayoutState;
1975 type PaintState = ();
1976
1977 fn layout(
1978 &mut self,
1979 constraint: SizeConstraint,
1980 editor: &mut Editor,
1981 cx: &mut LayoutContext<Editor>,
1982 ) -> (Vector2F, Self::LayoutState) {
1983 let mut size = constraint.max;
1984 if size.x().is_infinite() {
1985 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1986 }
1987
1988 let snapshot = editor.snapshot(cx);
1989 let style = self.style.clone();
1990 let line_height = (style.text.font_size * style.line_height_scalar).round();
1991
1992 let gutter_padding;
1993 let gutter_width;
1994 let gutter_margin;
1995 if snapshot.show_gutter {
1996 let em_width = style.text.em_width(cx.font_cache());
1997 gutter_padding = (em_width * style.gutter_padding_factor).round();
1998 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1999 gutter_margin = -style.text.descent(cx.font_cache());
2000 } else {
2001 gutter_padding = 0.0;
2002 gutter_width = 0.0;
2003 gutter_margin = 0.0;
2004 };
2005
2006 let text_width = size.x() - gutter_width;
2007 let em_width = style.text.em_width(cx.font_cache());
2008 let em_advance = style.text.em_advance(cx.font_cache());
2009 let overscroll = vec2f(em_width, 0.);
2010 let snapshot = {
2011 editor.set_visible_line_count(size.y() / line_height, cx);
2012
2013 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2014 let wrap_width = match editor.soft_wrap_mode(cx) {
2015 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2016 SoftWrap::EditorWidth => editor_width,
2017 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2018 };
2019
2020 if editor.set_wrap_width(Some(wrap_width), cx) {
2021 editor.snapshot(cx)
2022 } else {
2023 snapshot
2024 }
2025 };
2026
2027 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2028 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2029 size.set_y(
2030 scroll_height
2031 .min(constraint.max_along(Axis::Vertical))
2032 .max(constraint.min_along(Axis::Vertical))
2033 .min(line_height * max_lines as f32),
2034 )
2035 } else if let EditorMode::SingleLine = snapshot.mode {
2036 size.set_y(
2037 line_height
2038 .min(constraint.max_along(Axis::Vertical))
2039 .max(constraint.min_along(Axis::Vertical)),
2040 )
2041 } else if size.y().is_infinite() {
2042 size.set_y(scroll_height);
2043 }
2044 let gutter_size = vec2f(gutter_width, size.y());
2045 let text_size = vec2f(text_width, size.y());
2046
2047 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2048 let mut snapshot = editor.snapshot(cx);
2049
2050 let scroll_position = snapshot.scroll_position();
2051 // The scroll position is a fractional point, the whole number of which represents
2052 // the top of the window in terms of display rows.
2053 let start_row = scroll_position.y() as u32;
2054 let height_in_lines = size.y() / line_height;
2055 let max_row = snapshot.max_point().row();
2056
2057 // Add 1 to ensure selections bleed off screen
2058 let end_row = 1 + cmp::min(
2059 (scroll_position.y() + height_in_lines).ceil() as u32,
2060 max_row,
2061 );
2062
2063 let start_anchor = if start_row == 0 {
2064 Anchor::min()
2065 } else {
2066 snapshot
2067 .buffer_snapshot
2068 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2069 };
2070 let end_anchor = if end_row > max_row {
2071 Anchor::max()
2072 } else {
2073 snapshot
2074 .buffer_snapshot
2075 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2076 };
2077
2078 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2079 let mut active_rows = BTreeMap::new();
2080 let mut fold_ranges = Vec::new();
2081 let is_singleton = editor.is_singleton(cx);
2082
2083 let highlighted_rows = editor.highlighted_rows();
2084 let theme = theme::current(cx);
2085 let highlighted_ranges = editor.background_highlights_in_range(
2086 start_anchor..end_anchor,
2087 &snapshot.display_snapshot,
2088 theme.as_ref(),
2089 );
2090
2091 fold_ranges.extend(
2092 snapshot
2093 .folds_in_range(start_anchor..end_anchor)
2094 .map(|anchor| {
2095 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2096 (
2097 start.row,
2098 start.to_display_point(&snapshot.display_snapshot)
2099 ..anchor.end.to_display_point(&snapshot),
2100 )
2101 }),
2102 );
2103
2104 let mut remote_selections = HashMap::default();
2105 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2106 .buffer_snapshot
2107 .remote_selections_in_range(&(start_anchor..end_anchor))
2108 {
2109 // The local selections match the leader's selections.
2110 if Some(replica_id) == editor.leader_replica_id {
2111 continue;
2112 }
2113 remote_selections
2114 .entry(replica_id)
2115 .or_insert(Vec::new())
2116 .push(SelectionLayout::new(
2117 selection,
2118 line_mode,
2119 cursor_shape,
2120 &snapshot.display_snapshot,
2121 false,
2122 ));
2123 }
2124 selections.extend(remote_selections);
2125
2126 if editor.show_local_selections {
2127 let mut local_selections = editor
2128 .selections
2129 .disjoint_in_range(start_anchor..end_anchor, cx);
2130 local_selections.extend(editor.selections.pending(cx));
2131 let newest = editor.selections.newest(cx);
2132 for selection in &local_selections {
2133 let is_empty = selection.start == selection.end;
2134 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2135 let selection_end = snapshot.next_line_boundary(selection.end).1;
2136 for row in cmp::max(selection_start.row(), start_row)
2137 ..=cmp::min(selection_end.row(), end_row)
2138 {
2139 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2140 *contains_non_empty_selection |= !is_empty;
2141 }
2142 }
2143
2144 // Render the local selections in the leader's color when following.
2145 let local_replica_id = editor
2146 .leader_replica_id
2147 .unwrap_or_else(|| editor.replica_id(cx));
2148
2149 selections.push((
2150 local_replica_id,
2151 local_selections
2152 .into_iter()
2153 .map(|selection| {
2154 let is_newest = selection == newest;
2155 SelectionLayout::new(
2156 selection,
2157 editor.selections.line_mode,
2158 editor.cursor_shape,
2159 &snapshot.display_snapshot,
2160 is_newest,
2161 )
2162 })
2163 .collect(),
2164 ));
2165 }
2166
2167 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2168 let show_scrollbars = match scrollbar_settings.show {
2169 ShowScrollbar::Auto => {
2170 // Git
2171 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2172 ||
2173 // Selections
2174 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2175 // Scrollmanager
2176 || editor.scroll_manager.scrollbars_visible()
2177 }
2178 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2179 ShowScrollbar::Always => true,
2180 ShowScrollbar::Never => false,
2181 };
2182
2183 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2184 .into_iter()
2185 .map(|(id, fold)| {
2186 let color = self
2187 .style
2188 .folds
2189 .ellipses
2190 .background
2191 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2192 .color;
2193
2194 (id, fold, color)
2195 })
2196 .collect();
2197
2198 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2199 start_row..end_row,
2200 &active_rows,
2201 is_singleton,
2202 &snapshot,
2203 cx,
2204 );
2205
2206 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2207
2208 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2209
2210 let mut max_visible_line_width = 0.0;
2211 let line_layouts =
2212 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2213 for line_with_invisibles in &line_layouts {
2214 if line_with_invisibles.line.width() > max_visible_line_width {
2215 max_visible_line_width = line_with_invisibles.line.width();
2216 }
2217 }
2218
2219 let style = self.style.clone();
2220 let longest_line_width = layout_line(
2221 snapshot.longest_row(),
2222 &snapshot,
2223 &style,
2224 cx.text_layout_cache(),
2225 )
2226 .width();
2227 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2228 let em_width = style.text.em_width(cx.font_cache());
2229 let (scroll_width, blocks) = self.layout_blocks(
2230 start_row..end_row,
2231 &snapshot,
2232 size.x(),
2233 scroll_width,
2234 gutter_padding,
2235 gutter_width,
2236 em_width,
2237 gutter_width + gutter_margin,
2238 line_height,
2239 &style,
2240 &line_layouts,
2241 editor,
2242 cx,
2243 );
2244
2245 let scroll_max = vec2f(
2246 ((scroll_width - text_size.x()) / em_width).max(0.0),
2247 max_row as f32,
2248 );
2249
2250 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2251
2252 let autoscrolled = if autoscroll_horizontally {
2253 editor.autoscroll_horizontally(
2254 start_row,
2255 text_size.x(),
2256 scroll_width,
2257 em_width,
2258 &line_layouts,
2259 cx,
2260 )
2261 } else {
2262 false
2263 };
2264
2265 if clamped || autoscrolled {
2266 snapshot = editor.snapshot(cx);
2267 }
2268
2269 let newest_selection_head = editor
2270 .selections
2271 .newest::<usize>(cx)
2272 .head()
2273 .to_display_point(&snapshot);
2274 let style = editor.style(cx);
2275
2276 let mut context_menu = None;
2277 let mut code_actions_indicator = None;
2278 if (start_row..end_row).contains(&newest_selection_head.row()) {
2279 if editor.context_menu_visible() {
2280 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2281 }
2282
2283 let active = matches!(
2284 editor.context_menu,
2285 Some(crate::ContextMenu::CodeActions(_))
2286 );
2287
2288 code_actions_indicator = editor
2289 .render_code_actions_indicator(&style, active, cx)
2290 .map(|indicator| (newest_selection_head.row(), indicator));
2291 }
2292
2293 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2294 let mut hover = editor
2295 .hover_state
2296 .render(&snapshot, &style, visible_rows, cx);
2297 let mode = editor.mode;
2298
2299 let mut fold_indicators = editor.render_fold_indicators(
2300 fold_statuses,
2301 &style,
2302 editor.gutter_hovered,
2303 line_height,
2304 gutter_margin,
2305 cx,
2306 );
2307
2308 if let Some((_, context_menu)) = context_menu.as_mut() {
2309 context_menu.layout(
2310 SizeConstraint {
2311 min: Vector2F::zero(),
2312 max: vec2f(
2313 cx.window_size().x() * 0.7,
2314 (12. * line_height).min((size.y() - line_height) / 2.),
2315 ),
2316 },
2317 editor,
2318 cx,
2319 );
2320 }
2321
2322 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2323 indicator.layout(
2324 SizeConstraint::strict_along(
2325 Axis::Vertical,
2326 line_height * style.code_actions.vertical_scale,
2327 ),
2328 editor,
2329 cx,
2330 );
2331 }
2332
2333 for fold_indicator in fold_indicators.iter_mut() {
2334 if let Some(indicator) = fold_indicator.as_mut() {
2335 indicator.layout(
2336 SizeConstraint::strict_along(
2337 Axis::Vertical,
2338 line_height * style.code_actions.vertical_scale,
2339 ),
2340 editor,
2341 cx,
2342 );
2343 }
2344 }
2345
2346 if let Some((_, hover_popovers)) = hover.as_mut() {
2347 for hover_popover in hover_popovers.iter_mut() {
2348 hover_popover.layout(
2349 SizeConstraint {
2350 min: Vector2F::zero(),
2351 max: vec2f(
2352 (120. * em_width) // Default size
2353 .min(size.x() / 2.) // Shrink to half of the editor width
2354 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2355 (16. * line_height) // Default size
2356 .min(size.y() / 2.) // Shrink to half of the editor height
2357 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2358 ),
2359 },
2360 editor,
2361 cx,
2362 );
2363 }
2364 }
2365
2366 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2367 let invisible_symbol_style = RunStyle {
2368 color: self.style.whitespace,
2369 font_id: self.style.text.font_id,
2370 underline: Default::default(),
2371 };
2372
2373 (
2374 size,
2375 LayoutState {
2376 mode,
2377 position_map: Arc::new(PositionMap {
2378 size,
2379 scroll_max,
2380 line_layouts,
2381 line_height,
2382 em_width,
2383 em_advance,
2384 snapshot,
2385 }),
2386 visible_display_row_range: start_row..end_row,
2387 gutter_size,
2388 gutter_padding,
2389 text_size,
2390 scrollbar_row_range,
2391 show_scrollbars,
2392 is_singleton,
2393 max_row,
2394 gutter_margin,
2395 active_rows,
2396 highlighted_rows,
2397 highlighted_ranges,
2398 fold_ranges,
2399 line_number_layouts,
2400 display_hunks,
2401 blocks,
2402 selections,
2403 context_menu,
2404 code_actions_indicator,
2405 fold_indicators,
2406 tab_invisible: cx.text_layout_cache().layout_str(
2407 "→",
2408 invisible_symbol_font_size,
2409 &[("→".len(), invisible_symbol_style)],
2410 ),
2411 space_invisible: cx.text_layout_cache().layout_str(
2412 "•",
2413 invisible_symbol_font_size,
2414 &[("•".len(), invisible_symbol_style)],
2415 ),
2416 hover_popovers: hover,
2417 },
2418 )
2419 }
2420
2421 fn paint(
2422 &mut self,
2423 scene: &mut SceneBuilder,
2424 bounds: RectF,
2425 visible_bounds: RectF,
2426 layout: &mut Self::LayoutState,
2427 editor: &mut Editor,
2428 cx: &mut ViewContext<Editor>,
2429 ) -> Self::PaintState {
2430 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2431 scene.push_layer(Some(visible_bounds));
2432
2433 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2434 let text_bounds = RectF::new(
2435 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2436 layout.text_size,
2437 );
2438
2439 Self::attach_mouse_handlers(
2440 scene,
2441 &layout.position_map,
2442 layout.hover_popovers.is_some(),
2443 visible_bounds,
2444 text_bounds,
2445 gutter_bounds,
2446 bounds,
2447 cx,
2448 );
2449
2450 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2451 if layout.gutter_size.x() > 0. {
2452 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2453 }
2454 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2455
2456 scene.push_layer(Some(bounds));
2457 if !layout.blocks.is_empty() {
2458 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2459 }
2460 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2461 scene.pop_layer();
2462
2463 scene.pop_layer();
2464 }
2465
2466 fn rect_for_text_range(
2467 &self,
2468 range_utf16: Range<usize>,
2469 bounds: RectF,
2470 _: RectF,
2471 layout: &Self::LayoutState,
2472 _: &Self::PaintState,
2473 _: &Editor,
2474 _: &ViewContext<Editor>,
2475 ) -> Option<RectF> {
2476 let text_bounds = RectF::new(
2477 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2478 layout.text_size,
2479 );
2480 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2481 let scroll_position = layout.position_map.snapshot.scroll_position();
2482 let start_row = scroll_position.y() as u32;
2483 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2484 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2485
2486 let range_start = OffsetUtf16(range_utf16.start)
2487 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2488 if range_start.row() < start_row {
2489 return None;
2490 }
2491
2492 let line = &layout
2493 .position_map
2494 .line_layouts
2495 .get((range_start.row() - start_row) as usize)?
2496 .line;
2497 let range_start_x = line.x_for_index(range_start.column() as usize);
2498 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2499 Some(RectF::new(
2500 content_origin
2501 + vec2f(
2502 range_start_x,
2503 range_start_y + layout.position_map.line_height,
2504 )
2505 - vec2f(scroll_left, scroll_top),
2506 vec2f(
2507 layout.position_map.em_width,
2508 layout.position_map.line_height,
2509 ),
2510 ))
2511 }
2512
2513 fn debug(
2514 &self,
2515 bounds: RectF,
2516 _: &Self::LayoutState,
2517 _: &Self::PaintState,
2518 _: &Editor,
2519 _: &ViewContext<Editor>,
2520 ) -> json::Value {
2521 json!({
2522 "type": "BufferElement",
2523 "bounds": bounds.to_json()
2524 })
2525 }
2526}
2527
2528type BufferRow = u32;
2529
2530pub struct LayoutState {
2531 position_map: Arc<PositionMap>,
2532 gutter_size: Vector2F,
2533 gutter_padding: f32,
2534 gutter_margin: f32,
2535 text_size: Vector2F,
2536 mode: EditorMode,
2537 visible_display_row_range: Range<u32>,
2538 active_rows: BTreeMap<u32, bool>,
2539 highlighted_rows: Option<Range<u32>>,
2540 line_number_layouts: Vec<Option<text_layout::Line>>,
2541 display_hunks: Vec<DisplayDiffHunk>,
2542 blocks: Vec<BlockLayout>,
2543 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2544 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2545 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2546 scrollbar_row_range: Range<f32>,
2547 show_scrollbars: bool,
2548 is_singleton: bool,
2549 max_row: u32,
2550 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2551 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2552 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2553 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2554 tab_invisible: Line,
2555 space_invisible: Line,
2556}
2557
2558struct PositionMap {
2559 size: Vector2F,
2560 line_height: f32,
2561 scroll_max: Vector2F,
2562 em_width: f32,
2563 em_advance: f32,
2564 line_layouts: Vec<LineWithInvisibles>,
2565 snapshot: EditorSnapshot,
2566}
2567
2568impl PositionMap {
2569 /// Returns two display points:
2570 /// 1. The nearest *valid* position in the editor
2571 /// 2. An unclipped, potentially *invalid* position that maps directly to
2572 /// the given pixel position.
2573 fn point_for_position(
2574 &self,
2575 text_bounds: RectF,
2576 position: Vector2F,
2577 ) -> (DisplayPoint, DisplayPoint) {
2578 let scroll_position = self.snapshot.scroll_position();
2579 let position = position - text_bounds.origin();
2580 let y = position.y().max(0.0).min(self.size.y());
2581 let x = position.x() + (scroll_position.x() * self.em_width);
2582 let row = (y / self.line_height + scroll_position.y()) as u32;
2583 let (column, x_overshoot) = if let Some(line) = self
2584 .line_layouts
2585 .get(row as usize - scroll_position.y() as usize)
2586 .map(|line_with_spaces| &line_with_spaces.line)
2587 {
2588 if let Some(ix) = line.index_for_x(x) {
2589 (ix as u32, 0.0)
2590 } else {
2591 (line.len() as u32, 0f32.max(x - line.width()))
2592 }
2593 } else {
2594 (0, x)
2595 };
2596
2597 let mut target_point = DisplayPoint::new(row, column);
2598 let point = self.snapshot.clip_point(target_point, Bias::Left);
2599 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2600
2601 (point, target_point)
2602 }
2603}
2604
2605struct BlockLayout {
2606 row: u32,
2607 element: AnyElement<Editor>,
2608 style: BlockStyle,
2609}
2610
2611fn layout_line(
2612 row: u32,
2613 snapshot: &EditorSnapshot,
2614 style: &EditorStyle,
2615 layout_cache: &TextLayoutCache,
2616) -> text_layout::Line {
2617 let mut line = snapshot.line(row);
2618
2619 if line.len() > MAX_LINE_LEN {
2620 let mut len = MAX_LINE_LEN;
2621 while !line.is_char_boundary(len) {
2622 len -= 1;
2623 }
2624
2625 line.truncate(len);
2626 }
2627
2628 layout_cache.layout_str(
2629 &line,
2630 style.text.font_size,
2631 &[(
2632 snapshot.line_len(row) as usize,
2633 RunStyle {
2634 font_id: style.text.font_id,
2635 color: Color::black(),
2636 underline: Default::default(),
2637 },
2638 )],
2639 )
2640}
2641
2642#[derive(Debug)]
2643pub struct Cursor {
2644 origin: Vector2F,
2645 block_width: f32,
2646 line_height: f32,
2647 color: Color,
2648 shape: CursorShape,
2649 block_text: Option<Line>,
2650}
2651
2652impl Cursor {
2653 pub fn new(
2654 origin: Vector2F,
2655 block_width: f32,
2656 line_height: f32,
2657 color: Color,
2658 shape: CursorShape,
2659 block_text: Option<Line>,
2660 ) -> Cursor {
2661 Cursor {
2662 origin,
2663 block_width,
2664 line_height,
2665 color,
2666 shape,
2667 block_text,
2668 }
2669 }
2670
2671 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2672 RectF::new(
2673 self.origin + origin,
2674 vec2f(self.block_width, self.line_height),
2675 )
2676 }
2677
2678 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2679 let bounds = match self.shape {
2680 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2681 CursorShape::Block | CursorShape::Hollow => RectF::new(
2682 self.origin + origin,
2683 vec2f(self.block_width, self.line_height),
2684 ),
2685 CursorShape::Underscore => RectF::new(
2686 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2687 vec2f(self.block_width, 2.0),
2688 ),
2689 };
2690
2691 //Draw background or border quad
2692 if matches!(self.shape, CursorShape::Hollow) {
2693 scene.push_quad(Quad {
2694 bounds,
2695 background: None,
2696 border: Border::all(1., self.color),
2697 corner_radius: 0.,
2698 });
2699 } else {
2700 scene.push_quad(Quad {
2701 bounds,
2702 background: Some(self.color),
2703 border: Default::default(),
2704 corner_radius: 0.,
2705 });
2706 }
2707
2708 if let Some(block_text) = &self.block_text {
2709 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2710 }
2711 }
2712
2713 pub fn shape(&self) -> CursorShape {
2714 self.shape
2715 }
2716}
2717
2718#[derive(Debug)]
2719pub struct HighlightedRange {
2720 pub start_y: f32,
2721 pub line_height: f32,
2722 pub lines: Vec<HighlightedRangeLine>,
2723 pub color: Color,
2724 pub corner_radius: f32,
2725}
2726
2727#[derive(Debug)]
2728pub struct HighlightedRangeLine {
2729 pub start_x: f32,
2730 pub end_x: f32,
2731}
2732
2733impl HighlightedRange {
2734 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2735 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2736 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2737 self.paint_lines(
2738 self.start_y + self.line_height,
2739 &self.lines[1..],
2740 bounds,
2741 scene,
2742 );
2743 } else {
2744 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2745 }
2746 }
2747
2748 fn paint_lines(
2749 &self,
2750 start_y: f32,
2751 lines: &[HighlightedRangeLine],
2752 bounds: RectF,
2753 scene: &mut SceneBuilder,
2754 ) {
2755 if lines.is_empty() {
2756 return;
2757 }
2758
2759 let mut path = PathBuilder::new();
2760 let first_line = lines.first().unwrap();
2761 let last_line = lines.last().unwrap();
2762
2763 let first_top_left = vec2f(first_line.start_x, start_y);
2764 let first_top_right = vec2f(first_line.end_x, start_y);
2765
2766 let curve_height = vec2f(0., self.corner_radius);
2767 let curve_width = |start_x: f32, end_x: f32| {
2768 let max = (end_x - start_x) / 2.;
2769 let width = if max < self.corner_radius {
2770 max
2771 } else {
2772 self.corner_radius
2773 };
2774
2775 vec2f(width, 0.)
2776 };
2777
2778 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2779 path.reset(first_top_right - top_curve_width);
2780 path.curve_to(first_top_right + curve_height, first_top_right);
2781
2782 let mut iter = lines.iter().enumerate().peekable();
2783 while let Some((ix, line)) = iter.next() {
2784 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2785
2786 if let Some((_, next_line)) = iter.peek() {
2787 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2788
2789 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2790 Ordering::Equal => {
2791 path.line_to(bottom_right);
2792 }
2793 Ordering::Less => {
2794 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2795 path.line_to(bottom_right - curve_height);
2796 if self.corner_radius > 0. {
2797 path.curve_to(bottom_right - curve_width, bottom_right);
2798 }
2799 path.line_to(next_top_right + curve_width);
2800 if self.corner_radius > 0. {
2801 path.curve_to(next_top_right + curve_height, next_top_right);
2802 }
2803 }
2804 Ordering::Greater => {
2805 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2806 path.line_to(bottom_right - curve_height);
2807 if self.corner_radius > 0. {
2808 path.curve_to(bottom_right + curve_width, bottom_right);
2809 }
2810 path.line_to(next_top_right - curve_width);
2811 if self.corner_radius > 0. {
2812 path.curve_to(next_top_right + curve_height, next_top_right);
2813 }
2814 }
2815 }
2816 } else {
2817 let curve_width = curve_width(line.start_x, line.end_x);
2818 path.line_to(bottom_right - curve_height);
2819 if self.corner_radius > 0. {
2820 path.curve_to(bottom_right - curve_width, bottom_right);
2821 }
2822
2823 let bottom_left = vec2f(line.start_x, bottom_right.y());
2824 path.line_to(bottom_left + curve_width);
2825 if self.corner_radius > 0. {
2826 path.curve_to(bottom_left - curve_height, bottom_left);
2827 }
2828 }
2829 }
2830
2831 if first_line.start_x > last_line.start_x {
2832 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2833 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2834 path.line_to(second_top_left + curve_height);
2835 if self.corner_radius > 0. {
2836 path.curve_to(second_top_left + curve_width, second_top_left);
2837 }
2838 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2839 path.line_to(first_bottom_left - curve_width);
2840 if self.corner_radius > 0. {
2841 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2842 }
2843 }
2844
2845 path.line_to(first_top_left + curve_height);
2846 if self.corner_radius > 0. {
2847 path.curve_to(first_top_left + top_curve_width, first_top_left);
2848 }
2849 path.line_to(first_top_right - top_curve_width);
2850
2851 scene.push_path(path.build(self.color, Some(bounds)));
2852 }
2853}
2854
2855fn position_to_display_point(
2856 position: Vector2F,
2857 text_bounds: RectF,
2858 position_map: &PositionMap,
2859) -> Option<DisplayPoint> {
2860 if text_bounds.contains_point(position) {
2861 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2862 if point == target_point {
2863 Some(point)
2864 } else {
2865 None
2866 }
2867 } else {
2868 None
2869 }
2870}
2871
2872fn range_to_bounds(
2873 range: &Range<DisplayPoint>,
2874 content_origin: Vector2F,
2875 scroll_left: f32,
2876 scroll_top: f32,
2877 visible_row_range: &Range<u32>,
2878 line_end_overshoot: f32,
2879 position_map: &PositionMap,
2880) -> impl Iterator<Item = RectF> {
2881 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2882
2883 if range.start == range.end {
2884 return bounds.into_iter();
2885 }
2886
2887 let start_row = visible_row_range.start;
2888 let end_row = visible_row_range.end;
2889
2890 let row_range = if range.end.column() == 0 {
2891 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2892 } else {
2893 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2894 };
2895
2896 let first_y =
2897 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2898
2899 for (idx, row) in row_range.enumerate() {
2900 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2901
2902 let start_x = if row == range.start.row() {
2903 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2904 - scroll_left
2905 } else {
2906 content_origin.x() - scroll_left
2907 };
2908
2909 let end_x = if row == range.end.row() {
2910 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2911 } else {
2912 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2913 };
2914
2915 bounds.push(RectF::from_points(
2916 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2917 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2918 ))
2919 }
2920
2921 bounds.into_iter()
2922}
2923
2924pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2925 delta.powf(1.5) / 100.0
2926}
2927
2928fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2929 delta.powf(1.2) / 300.0
2930}
2931
2932#[cfg(test)]
2933mod tests {
2934 use super::*;
2935 use crate::{
2936 display_map::{BlockDisposition, BlockProperties},
2937 editor_tests::{init_test, update_test_language_settings},
2938 Editor, MultiBuffer,
2939 };
2940 use gpui::TestAppContext;
2941 use language::language_settings;
2942 use log::info;
2943 use std::{num::NonZeroU32, sync::Arc};
2944 use util::test::sample_text;
2945
2946 #[gpui::test]
2947 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2948 init_test(cx, |_| {});
2949
2950 let (_, editor) = cx.add_window(|cx| {
2951 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2952 Editor::new(EditorMode::Full, buffer, None, None, cx)
2953 });
2954 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2955
2956 let layouts = editor.update(cx, |editor, cx| {
2957 let snapshot = editor.snapshot(cx);
2958 element
2959 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2960 .0
2961 });
2962 assert_eq!(layouts.len(), 6);
2963 }
2964
2965 #[gpui::test]
2966 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2967 init_test(cx, |_| {});
2968
2969 let (_, editor) = cx.add_window(|cx| {
2970 let buffer = MultiBuffer::build_simple("", cx);
2971 Editor::new(EditorMode::Full, buffer, None, None, cx)
2972 });
2973
2974 editor.update(cx, |editor, cx| {
2975 editor.set_placeholder_text("hello", cx);
2976 editor.insert_blocks(
2977 [BlockProperties {
2978 style: BlockStyle::Fixed,
2979 disposition: BlockDisposition::Above,
2980 height: 3,
2981 position: Anchor::min(),
2982 render: Arc::new(|_| Empty::new().into_any()),
2983 }],
2984 None,
2985 cx,
2986 );
2987
2988 // Blur the editor so that it displays placeholder text.
2989 cx.blur();
2990 });
2991
2992 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2993 let (size, mut state) = editor.update(cx, |editor, cx| {
2994 let mut new_parents = Default::default();
2995 let mut notify_views_if_parents_change = Default::default();
2996 let mut layout_cx = LayoutContext::new(
2997 cx,
2998 &mut new_parents,
2999 &mut notify_views_if_parents_change,
3000 false,
3001 );
3002 element.layout(
3003 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3004 editor,
3005 &mut layout_cx,
3006 )
3007 });
3008
3009 assert_eq!(state.position_map.line_layouts.len(), 4);
3010 assert_eq!(
3011 state
3012 .line_number_layouts
3013 .iter()
3014 .map(Option::is_some)
3015 .collect::<Vec<_>>(),
3016 &[false, false, false, true]
3017 );
3018
3019 // Don't panic.
3020 let mut scene = SceneBuilder::new(1.0);
3021 let bounds = RectF::new(Default::default(), size);
3022 editor.update(cx, |editor, cx| {
3023 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3024 });
3025 }
3026
3027 #[gpui::test]
3028 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3029 const TAB_SIZE: u32 = 4;
3030
3031 let input_text = "\t \t|\t| a b";
3032 let expected_invisibles = vec![
3033 Invisible::Tab {
3034 line_start_offset: 0,
3035 },
3036 Invisible::Whitespace {
3037 line_offset: TAB_SIZE as usize,
3038 },
3039 Invisible::Tab {
3040 line_start_offset: TAB_SIZE as usize + 1,
3041 },
3042 Invisible::Tab {
3043 line_start_offset: TAB_SIZE as usize * 2 + 1,
3044 },
3045 Invisible::Whitespace {
3046 line_offset: TAB_SIZE as usize * 3 + 1,
3047 },
3048 Invisible::Whitespace {
3049 line_offset: TAB_SIZE as usize * 3 + 3,
3050 },
3051 ];
3052 assert_eq!(
3053 expected_invisibles.len(),
3054 input_text
3055 .chars()
3056 .filter(|initial_char| initial_char.is_whitespace())
3057 .count(),
3058 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3059 );
3060
3061 init_test(cx, |s| {
3062 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3063 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3064 });
3065
3066 let actual_invisibles =
3067 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3068
3069 assert_eq!(expected_invisibles, actual_invisibles);
3070 }
3071
3072 #[gpui::test]
3073 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3074 init_test(cx, |s| {
3075 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3076 s.defaults.tab_size = NonZeroU32::new(4);
3077 });
3078
3079 for editor_mode_without_invisibles in [
3080 EditorMode::SingleLine,
3081 EditorMode::AutoHeight { max_lines: 100 },
3082 ] {
3083 let invisibles = collect_invisibles_from_new_editor(
3084 cx,
3085 editor_mode_without_invisibles,
3086 "\t\t\t| | a b",
3087 500.0,
3088 );
3089 assert!(invisibles.is_empty(),
3090 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3091 }
3092 }
3093
3094 #[gpui::test]
3095 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3096 let tab_size = 4;
3097 let input_text = "a\tbcd ".repeat(9);
3098 let repeated_invisibles = [
3099 Invisible::Tab {
3100 line_start_offset: 1,
3101 },
3102 Invisible::Whitespace {
3103 line_offset: tab_size as usize + 3,
3104 },
3105 Invisible::Whitespace {
3106 line_offset: tab_size as usize + 4,
3107 },
3108 Invisible::Whitespace {
3109 line_offset: tab_size as usize + 5,
3110 },
3111 ];
3112 let expected_invisibles = std::iter::once(repeated_invisibles)
3113 .cycle()
3114 .take(9)
3115 .flatten()
3116 .collect::<Vec<_>>();
3117 assert_eq!(
3118 expected_invisibles.len(),
3119 input_text
3120 .chars()
3121 .filter(|initial_char| initial_char.is_whitespace())
3122 .count(),
3123 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3124 );
3125 info!("Expected invisibles: {expected_invisibles:?}");
3126
3127 init_test(cx, |_| {});
3128
3129 // Put the same string with repeating whitespace pattern into editors of various size,
3130 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3131 let resize_step = 10.0;
3132 let mut editor_width = 200.0;
3133 while editor_width <= 1000.0 {
3134 update_test_language_settings(cx, |s| {
3135 s.defaults.tab_size = NonZeroU32::new(tab_size);
3136 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3137 s.defaults.preferred_line_length = Some(editor_width as u32);
3138 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3139 });
3140
3141 let actual_invisibles =
3142 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3143
3144 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3145 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3146 let mut i = 0;
3147 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3148 i = actual_index;
3149 match expected_invisibles.get(i) {
3150 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3151 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3152 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3153 _ => {
3154 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3155 }
3156 },
3157 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3158 }
3159 }
3160 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3161 assert!(
3162 missing_expected_invisibles.is_empty(),
3163 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3164 );
3165
3166 editor_width += resize_step;
3167 }
3168 }
3169
3170 fn collect_invisibles_from_new_editor(
3171 cx: &mut TestAppContext,
3172 editor_mode: EditorMode,
3173 input_text: &str,
3174 editor_width: f32,
3175 ) -> Vec<Invisible> {
3176 info!(
3177 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3178 );
3179 let (_, editor) = cx.add_window(|cx| {
3180 let buffer = MultiBuffer::build_simple(&input_text, cx);
3181 Editor::new(editor_mode, buffer, None, None, cx)
3182 });
3183
3184 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3185 let (_, layout_state) = editor.update(cx, |editor, cx| {
3186 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3187 editor.set_wrap_width(Some(editor_width), cx);
3188
3189 let mut new_parents = Default::default();
3190 let mut notify_views_if_parents_change = Default::default();
3191 let mut layout_cx = LayoutContext::new(
3192 cx,
3193 &mut new_parents,
3194 &mut notify_views_if_parents_change,
3195 false,
3196 );
3197 element.layout(
3198 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3199 editor,
3200 &mut layout_cx,
3201 )
3202 });
3203
3204 layout_state
3205 .position_map
3206 .line_layouts
3207 .iter()
3208 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3209 .flatten()
3210 .cloned()
3211 .collect()
3212 }
3213}