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