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