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 text::Point;
51use workspace::item::Item;
52
53enum FoldMarkers {}
54
55struct SelectionLayout {
56 head: DisplayPoint,
57 cursor_shape: CursorShape,
58 range: Range<DisplayPoint>,
59}
60
61impl SelectionLayout {
62 fn new<T: ToPoint + ToDisplayPoint + Clone>(
63 selection: Selection<T>,
64 line_mode: bool,
65 cursor_shape: CursorShape,
66 map: &DisplaySnapshot,
67 ) -> Self {
68 if line_mode {
69 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
70 let point_range = map.expand_to_line(selection.range());
71 Self {
72 head: selection.head().to_display_point(map),
73 cursor_shape,
74 range: point_range.start.to_display_point(map)
75 ..point_range.end.to_display_point(map),
76 }
77 } else {
78 let selection = selection.map(|p| p.to_display_point(map));
79 Self {
80 head: selection.head(),
81 cursor_shape,
82 range: selection.range(),
83 }
84 }
85 }
86}
87
88#[derive(Clone)]
89pub struct EditorElement {
90 style: Arc<EditorStyle>,
91}
92
93impl EditorElement {
94 pub fn new(style: EditorStyle) -> Self {
95 Self {
96 style: Arc::new(style),
97 }
98 }
99
100 fn attach_mouse_handlers(
101 scene: &mut SceneBuilder,
102 position_map: &Arc<PositionMap>,
103 has_popovers: bool,
104 visible_bounds: RectF,
105 text_bounds: RectF,
106 gutter_bounds: RectF,
107 bounds: RectF,
108 cx: &mut ViewContext<Editor>,
109 ) {
110 enum EditorElementMouseHandlers {}
111 scene.push_mouse_region(
112 MouseRegion::new::<EditorElementMouseHandlers>(
113 cx.view_id(),
114 cx.view_id(),
115 visible_bounds,
116 )
117 .on_down(MouseButton::Left, {
118 let position_map = position_map.clone();
119 move |event, editor, cx| {
120 if !Self::mouse_down(
121 editor,
122 event.platform_event,
123 position_map.as_ref(),
124 text_bounds,
125 gutter_bounds,
126 cx,
127 ) {
128 cx.propagate_event();
129 }
130 }
131 })
132 .on_down(MouseButton::Right, {
133 let position_map = position_map.clone();
134 move |event, editor, cx| {
135 if !Self::mouse_right_down(
136 editor,
137 event.position,
138 position_map.as_ref(),
139 text_bounds,
140 cx,
141 ) {
142 cx.propagate_event();
143 }
144 }
145 })
146 .on_up(MouseButton::Left, {
147 let position_map = position_map.clone();
148 move |event, editor, cx| {
149 if !Self::mouse_up(
150 editor,
151 event.position,
152 event.cmd,
153 event.shift,
154 position_map.as_ref(),
155 text_bounds,
156 cx,
157 ) {
158 cx.propagate_event()
159 }
160 }
161 })
162 .on_drag(MouseButton::Left, {
163 let position_map = position_map.clone();
164 move |event, editor, cx| {
165 if !Self::mouse_dragged(
166 editor,
167 event.platform_event,
168 position_map.as_ref(),
169 text_bounds,
170 cx,
171 ) {
172 cx.propagate_event()
173 }
174 }
175 })
176 .on_move({
177 let position_map = position_map.clone();
178 move |event, editor, cx| {
179 if !Self::mouse_moved(
180 editor,
181 event.platform_event,
182 &position_map,
183 text_bounds,
184 cx,
185 ) {
186 cx.propagate_event()
187 }
188 }
189 })
190 .on_move_out(move |_, editor: &mut Editor, cx| {
191 if has_popovers {
192 hide_hover(editor, cx);
193 }
194 })
195 .on_scroll({
196 let position_map = position_map.clone();
197 move |event, editor, cx| {
198 if !Self::scroll(
199 editor,
200 event.position,
201 *event.delta.raw(),
202 event.delta.precise(),
203 &position_map,
204 bounds,
205 cx,
206 ) {
207 cx.propagate_event()
208 }
209 }
210 }),
211 );
212
213 enum GutterHandlers {}
214 scene.push_mouse_region(
215 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
216 .on_hover(|hover, editor: &mut Editor, cx| {
217 editor.gutter_hover(
218 &GutterHover {
219 hovered: hover.started,
220 },
221 cx,
222 );
223 }),
224 )
225 }
226
227 fn mouse_down(
228 editor: &mut Editor,
229 MouseButtonEvent {
230 position,
231 modifiers:
232 Modifiers {
233 shift,
234 ctrl,
235 alt,
236 cmd,
237 ..
238 },
239 mut click_count,
240 ..
241 }: MouseButtonEvent,
242 position_map: &PositionMap,
243 text_bounds: RectF,
244 gutter_bounds: RectF,
245 cx: &mut EventContext<Editor>,
246 ) -> bool {
247 if gutter_bounds.contains_point(position) {
248 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
249 } else if !text_bounds.contains_point(position) {
250 return false;
251 }
252
253 let (position, target_position) = position_map.point_for_position(text_bounds, position);
254
255 if shift && alt {
256 editor.select(
257 SelectPhase::BeginColumnar {
258 position,
259 goal_column: target_position.column(),
260 },
261 cx,
262 );
263 } else if shift && !ctrl && !alt && !cmd {
264 editor.select(
265 SelectPhase::Extend {
266 position,
267 click_count,
268 },
269 cx,
270 );
271 } else {
272 editor.select(
273 SelectPhase::Begin {
274 position,
275 add: alt,
276 click_count,
277 },
278 cx,
279 );
280 }
281
282 true
283 }
284
285 fn mouse_right_down(
286 editor: &mut Editor,
287 position: Vector2F,
288 position_map: &PositionMap,
289 text_bounds: RectF,
290 cx: &mut EventContext<Editor>,
291 ) -> bool {
292 if !text_bounds.contains_point(position) {
293 return false;
294 }
295
296 let (point, _) = position_map.point_for_position(text_bounds, position);
297 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
298 true
299 }
300
301 fn mouse_up(
302 editor: &mut Editor,
303 position: Vector2F,
304 cmd: bool,
305 shift: bool,
306 position_map: &PositionMap,
307 text_bounds: RectF,
308 cx: &mut EventContext<Editor>,
309 ) -> bool {
310 let end_selection = editor.has_pending_selection();
311 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
312
313 if end_selection {
314 editor.select(SelectPhase::End, cx);
315 }
316
317 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
318 let (point, target_point) = position_map.point_for_position(text_bounds, position);
319
320 if point == target_point {
321 if shift {
322 go_to_fetched_type_definition(editor, point, cx);
323 } else {
324 go_to_fetched_definition(editor, point, cx);
325 }
326
327 return true;
328 }
329 }
330
331 end_selection
332 }
333
334 fn mouse_dragged(
335 editor: &mut Editor,
336 MouseMovedEvent {
337 modifiers: Modifiers { cmd, shift, .. },
338 position,
339 ..
340 }: MouseMovedEvent,
341 position_map: &PositionMap,
342 text_bounds: RectF,
343 cx: &mut EventContext<Editor>,
344 ) -> bool {
345 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
346 // Don't trigger hover popover if mouse is hovering over context menu
347 let point = if text_bounds.contains_point(position) {
348 let (point, target_point) = position_map.point_for_position(text_bounds, position);
349 if point == target_point {
350 Some(point)
351 } else {
352 None
353 }
354 } else {
355 None
356 };
357
358 update_go_to_definition_link(editor, point, cmd, shift, cx);
359
360 if editor.has_pending_selection() {
361 let mut scroll_delta = Vector2F::zero();
362
363 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
364 let top = text_bounds.origin_y() + vertical_margin;
365 let bottom = text_bounds.lower_left().y() - vertical_margin;
366 if position.y() < top {
367 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
368 }
369 if position.y() > bottom {
370 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
371 }
372
373 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
374 let left = text_bounds.origin_x() + horizontal_margin;
375 let right = text_bounds.upper_right().x() - horizontal_margin;
376 if position.x() < left {
377 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
378 left - position.x(),
379 ))
380 }
381 if position.x() > right {
382 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
383 position.x() - right,
384 ))
385 }
386
387 let (position, target_position) =
388 position_map.point_for_position(text_bounds, position);
389
390 editor.select(
391 SelectPhase::Update {
392 position,
393 goal_column: target_position.column(),
394 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
395 .clamp(Vector2F::zero(), position_map.scroll_max),
396 },
397 cx,
398 );
399 hover_at(editor, point, cx);
400 true
401 } else {
402 hover_at(editor, point, cx);
403 false
404 }
405 }
406
407 fn mouse_moved(
408 editor: &mut Editor,
409 MouseMovedEvent {
410 modifiers: Modifiers { shift, cmd, .. },
411 position,
412 ..
413 }: MouseMovedEvent,
414 position_map: &PositionMap,
415 text_bounds: RectF,
416 cx: &mut ViewContext<Editor>,
417 ) -> bool {
418 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
419 // Don't trigger hover popover if mouse is hovering over context menu
420 let point = position_to_display_point(position, text_bounds, position_map);
421
422 update_go_to_definition_link(editor, point, cmd, shift, cx);
423 hover_at(editor, point, cx);
424
425 true
426 }
427
428 fn scroll(
429 editor: &mut Editor,
430 position: Vector2F,
431 mut delta: Vector2F,
432 precise: bool,
433 position_map: &PositionMap,
434 bounds: RectF,
435 cx: &mut ViewContext<Editor>,
436 ) -> bool {
437 if !bounds.contains_point(position) {
438 return false;
439 }
440
441 let line_height = position_map.line_height;
442 let max_glyph_width = position_map.em_width;
443
444 let axis = if precise {
445 //Trackpad
446 position_map.snapshot.ongoing_scroll.filter(&mut delta)
447 } else {
448 //Not trackpad
449 delta *= vec2f(max_glyph_width, line_height);
450 None //Resets ongoing scroll
451 };
452
453 let scroll_position = position_map.snapshot.scroll_position();
454 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
455 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
456 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
457 editor.scroll(scroll_position, axis, cx);
458
459 true
460 }
461
462 fn paint_background(
463 &self,
464 scene: &mut SceneBuilder,
465 gutter_bounds: RectF,
466 text_bounds: RectF,
467 layout: &LayoutState,
468 ) {
469 let bounds = gutter_bounds.union_rect(text_bounds);
470 let scroll_top =
471 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
472 scene.push_quad(Quad {
473 bounds: gutter_bounds,
474 background: Some(self.style.gutter_background),
475 border: Border::new(0., Color::transparent_black()),
476 corner_radius: 0.,
477 });
478 scene.push_quad(Quad {
479 bounds: text_bounds,
480 background: Some(self.style.background),
481 border: Border::new(0., Color::transparent_black()),
482 corner_radius: 0.,
483 });
484
485 if let EditorMode::Full = layout.mode {
486 let mut active_rows = layout.active_rows.iter().peekable();
487 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
488 let mut end_row = *start_row;
489 while active_rows.peek().map_or(false, |r| {
490 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
491 }) {
492 active_rows.next().unwrap();
493 end_row += 1;
494 }
495
496 if !contains_non_empty_selection {
497 let origin = vec2f(
498 bounds.origin_x(),
499 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
500 - scroll_top,
501 );
502 let size = vec2f(
503 bounds.width(),
504 layout.position_map.line_height * (end_row - start_row + 1) as f32,
505 );
506 scene.push_quad(Quad {
507 bounds: RectF::new(origin, size),
508 background: Some(self.style.active_line_background),
509 border: Border::default(),
510 corner_radius: 0.,
511 });
512 }
513 }
514
515 if let Some(highlighted_rows) = &layout.highlighted_rows {
516 let origin = vec2f(
517 bounds.origin_x(),
518 bounds.origin_y()
519 + (layout.position_map.line_height * highlighted_rows.start as f32)
520 - scroll_top,
521 );
522 let size = vec2f(
523 bounds.width(),
524 layout.position_map.line_height * highlighted_rows.len() as f32,
525 );
526 scene.push_quad(Quad {
527 bounds: RectF::new(origin, size),
528 background: Some(self.style.highlighted_line_background),
529 border: Border::default(),
530 corner_radius: 0.,
531 });
532 }
533 }
534 }
535
536 fn paint_gutter(
537 &mut self,
538 scene: &mut SceneBuilder,
539 bounds: RectF,
540 visible_bounds: RectF,
541 layout: &mut LayoutState,
542 editor: &mut Editor,
543 cx: &mut ViewContext<Editor>,
544 ) {
545 let line_height = layout.position_map.line_height;
546
547 let scroll_position = layout.position_map.snapshot.scroll_position();
548 let scroll_top = scroll_position.y() * line_height;
549
550 let show_gutter = matches!(
551 &cx.global::<Settings>()
552 .git_overrides
553 .git_gutter
554 .unwrap_or_default(),
555 GitGutter::TrackedFiles
556 );
557
558 if show_gutter {
559 Self::paint_diff_hunks(scene, bounds, layout, cx);
560 }
561
562 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
563 if let Some(line) = line {
564 let line_origin = bounds.origin()
565 + vec2f(
566 bounds.width() - line.width() - layout.gutter_padding,
567 ix as f32 * line_height - (scroll_top % line_height),
568 );
569
570 line.paint(scene, line_origin, visible_bounds, line_height, cx);
571 }
572 }
573
574 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
575 if let Some(indicator) = fold_indicator.as_mut() {
576 let position = vec2f(
577 bounds.width() - layout.gutter_padding,
578 ix as f32 * line_height - (scroll_top % line_height),
579 );
580 let centering_offset = vec2f(
581 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
582 (line_height - indicator.size().y()) / 2.,
583 );
584
585 let indicator_origin = bounds.origin() + position + centering_offset;
586
587 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
588 }
589 }
590
591 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
592 let mut x = 0.;
593 let mut y = *row as f32 * line_height - scroll_top;
594 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
595 y += (line_height - indicator.size().y()) / 2.;
596 indicator.paint(
597 scene,
598 bounds.origin() + vec2f(x, y),
599 visible_bounds,
600 editor,
601 cx,
602 );
603 }
604 }
605
606 fn paint_diff_hunks(
607 scene: &mut SceneBuilder,
608 bounds: RectF,
609 layout: &mut LayoutState,
610 cx: &mut ViewContext<Editor>,
611 ) {
612 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
613 let line_height = layout.position_map.line_height;
614
615 let scroll_position = layout.position_map.snapshot.scroll_position();
616 let scroll_top = scroll_position.y() * line_height;
617
618 for hunk in &layout.display_hunks {
619 let (display_row_range, status) = match hunk {
620 //TODO: This rendering is entirely a horrible hack
621 &DisplayDiffHunk::Folded { display_row: row } => {
622 let start_y = row as f32 * line_height - scroll_top;
623 let end_y = start_y + line_height;
624
625 let width = diff_style.removed_width_em * line_height;
626 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
627 let highlight_size = vec2f(width * 2., end_y - start_y);
628 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
629
630 scene.push_quad(Quad {
631 bounds: highlight_bounds,
632 background: Some(diff_style.modified),
633 border: Border::new(0., Color::transparent_black()),
634 corner_radius: 1. * line_height,
635 });
636
637 continue;
638 }
639
640 DisplayDiffHunk::Unfolded {
641 display_row_range,
642 status,
643 } => (display_row_range, status),
644 };
645
646 let color = match status {
647 DiffHunkStatus::Added => diff_style.inserted,
648 DiffHunkStatus::Modified => diff_style.modified,
649
650 //TODO: This rendering is entirely a horrible hack
651 DiffHunkStatus::Removed => {
652 let row = display_row_range.start;
653
654 let offset = line_height / 2.;
655 let start_y = row as f32 * line_height - offset - scroll_top;
656 let end_y = start_y + line_height;
657
658 let width = diff_style.removed_width_em * line_height;
659 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
660 let highlight_size = vec2f(width * 2., end_y - start_y);
661 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
662
663 scene.push_quad(Quad {
664 bounds: highlight_bounds,
665 background: Some(diff_style.deleted),
666 border: Border::new(0., Color::transparent_black()),
667 corner_radius: 1. * line_height,
668 });
669
670 continue;
671 }
672 };
673
674 let start_row = display_row_range.start;
675 let end_row = display_row_range.end;
676
677 let start_y = start_row as f32 * line_height - scroll_top;
678 let end_y = end_row as f32 * line_height - scroll_top;
679
680 let width = diff_style.width_em * line_height;
681 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
682 let highlight_size = vec2f(width * 2., end_y - start_y);
683 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
684
685 scene.push_quad(Quad {
686 bounds: highlight_bounds,
687 background: Some(color),
688 border: Border::new(0., Color::transparent_black()),
689 corner_radius: diff_style.corner_radius * line_height,
690 });
691 }
692 }
693
694 fn paint_text(
695 &mut self,
696 scene: &mut SceneBuilder,
697 bounds: RectF,
698 visible_bounds: RectF,
699 layout: &mut LayoutState,
700 editor: &mut Editor,
701 cx: &mut ViewContext<Editor>,
702 ) {
703 let style = &self.style;
704 let local_replica_id = editor.replica_id(cx);
705 let scroll_position = layout.position_map.snapshot.scroll_position();
706 let start_row = layout.visible_display_row_range.start;
707 let scroll_top = scroll_position.y() * layout.position_map.line_height;
708 let max_glyph_width = layout.position_map.em_width;
709 let scroll_left = scroll_position.x() * max_glyph_width;
710 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
711 let line_end_overshoot = 0.15 * layout.position_map.line_height;
712
713 scene.push_layer(Some(bounds));
714
715 scene.push_cursor_region(CursorRegion {
716 bounds,
717 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
718 CursorStyle::PointingHand
719 } else {
720 CursorStyle::IBeam
721 },
722 });
723
724 let fold_corner_radius =
725 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
726 for (id, range, color) in layout.fold_ranges.iter() {
727 self.paint_highlighted_range(
728 scene,
729 range.clone(),
730 *color,
731 fold_corner_radius,
732 fold_corner_radius * 2.,
733 layout,
734 content_origin,
735 scroll_top,
736 scroll_left,
737 bounds,
738 );
739
740 for bound in range_to_bounds(
741 &range,
742 content_origin,
743 scroll_left,
744 scroll_top,
745 &layout.visible_display_row_range,
746 line_end_overshoot,
747 &layout.position_map,
748 ) {
749 scene.push_cursor_region(CursorRegion {
750 bounds: bound,
751 style: CursorStyle::PointingHand,
752 });
753
754 let display_row = range.start.row();
755
756 let buffer_row = DisplayPoint::new(display_row, 0)
757 .to_point(&layout.position_map.snapshot.display_snapshot)
758 .row;
759
760 scene.push_mouse_region(
761 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
762 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
763 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
764 })
765 .with_notify_on_hover(true)
766 .with_notify_on_click(true),
767 )
768 }
769 }
770
771 for (range, color) in &layout.highlighted_ranges {
772 self.paint_highlighted_range(
773 scene,
774 range.clone(),
775 *color,
776 0.,
777 line_end_overshoot,
778 layout,
779 content_origin,
780 scroll_top,
781 scroll_left,
782 bounds,
783 );
784 }
785
786 let mut cursors = SmallVec::<[Cursor; 32]>::new();
787 let corner_radius = 0.15 * layout.position_map.line_height;
788 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
789
790 for (replica_id, selections) in &layout.selections {
791 let replica_id = *replica_id;
792 let selection_style = style.replica_selection_style(replica_id);
793
794 for selection in selections {
795 if !selection.range.is_empty()
796 && (replica_id == local_replica_id
797 || Some(replica_id) == editor.leader_replica_id)
798 {
799 invisible_display_ranges.push(selection.range.clone());
800 }
801 self.paint_highlighted_range(
802 scene,
803 selection.range.clone(),
804 selection_style.selection,
805 corner_radius,
806 corner_radius * 2.,
807 layout,
808 content_origin,
809 scroll_top,
810 scroll_left,
811 bounds,
812 );
813
814 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
815 let cursor_position = selection.head;
816 if layout
817 .visible_display_row_range
818 .contains(&cursor_position.row())
819 {
820 let cursor_row_layout = &layout.position_map.line_layouts
821 [(cursor_position.row() - start_row) as usize]
822 .line;
823 let cursor_column = cursor_position.column() as usize;
824
825 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
826 let mut block_width =
827 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
828 if block_width == 0.0 {
829 block_width = layout.position_map.em_width;
830 }
831 let block_text = if let CursorShape::Block = selection.cursor_shape {
832 layout
833 .position_map
834 .snapshot
835 .chars_at(cursor_position)
836 .next()
837 .and_then(|(character, _)| {
838 let font_id =
839 cursor_row_layout.font_for_index(cursor_column)?;
840 let text = character.to_string();
841
842 Some(cx.text_layout_cache().layout_str(
843 &text,
844 cursor_row_layout.font_size(),
845 &[(
846 text.len(),
847 RunStyle {
848 font_id,
849 color: style.background,
850 underline: Default::default(),
851 },
852 )],
853 ))
854 })
855 } else {
856 None
857 };
858
859 let x = cursor_character_x - scroll_left;
860 let y = cursor_position.row() as f32 * layout.position_map.line_height
861 - scroll_top;
862 cursors.push(Cursor {
863 color: selection_style.cursor,
864 block_width,
865 origin: vec2f(x, y),
866 line_height: layout.position_map.line_height,
867 shape: selection.cursor_shape,
868 block_text,
869 });
870 }
871 }
872 }
873 }
874
875 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
876 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
877 let row = start_row + ix as u32;
878 line_with_invisibles.draw(
879 layout,
880 row,
881 scroll_top,
882 scene,
883 content_origin,
884 scroll_left,
885 visible_text_bounds,
886 cx,
887 &invisible_display_ranges,
888 visible_bounds,
889 )
890 }
891 }
892
893 scene.paint_layer(Some(bounds), |scene| {
894 for cursor in cursors {
895 cursor.paint(scene, content_origin, cx);
896 }
897 });
898
899 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
900 scene.push_stacking_context(None, None);
901 let cursor_row_layout =
902 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
903 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
904 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
905 let mut list_origin = content_origin + vec2f(x, y);
906 let list_width = context_menu.size().x();
907 let list_height = context_menu.size().y();
908
909 // Snap the right edge of the list to the right edge of the window if
910 // its horizontal bounds overflow.
911 if list_origin.x() + list_width > cx.window_size().x() {
912 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
913 }
914
915 if list_origin.y() + list_height > bounds.max_y() {
916 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
917 }
918
919 context_menu.paint(
920 scene,
921 list_origin,
922 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
923 editor,
924 cx,
925 );
926
927 scene.pop_stacking_context();
928 }
929
930 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
931 scene.push_stacking_context(None, None);
932
933 // This is safe because we check on layout whether the required row is available
934 let hovered_row_layout =
935 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
936
937 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
938 // height. This is the size we will use to decide whether to render popovers above or below
939 // the hovered line.
940 let first_size = hover_popovers[0].size();
941 let height_to_reserve = first_size.y()
942 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
943
944 // Compute Hovered Point
945 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
946 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
947 let hovered_point = content_origin + vec2f(x, y);
948
949 if hovered_point.y() - height_to_reserve > 0.0 {
950 // There is enough space above. Render popovers above the hovered point
951 let mut current_y = hovered_point.y();
952 for hover_popover in hover_popovers {
953 let size = hover_popover.size();
954 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
955
956 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
957 if x_out_of_bounds < 0.0 {
958 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
959 }
960
961 hover_popover.paint(
962 scene,
963 popover_origin,
964 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
965 editor,
966 cx,
967 );
968
969 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
970 }
971 } else {
972 // There is not enough space above. Render popovers below the hovered point
973 let mut current_y = hovered_point.y() + layout.position_map.line_height;
974 for hover_popover in hover_popovers {
975 let size = hover_popover.size();
976 let mut popover_origin = vec2f(hovered_point.x(), current_y);
977
978 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
979 if x_out_of_bounds < 0.0 {
980 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
981 }
982
983 hover_popover.paint(
984 scene,
985 popover_origin,
986 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
987 editor,
988 cx,
989 );
990
991 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
992 }
993 }
994
995 scene.pop_stacking_context();
996 }
997
998 scene.pop_layer();
999 }
1000
1001 fn paint_scrollbar(
1002 &mut self,
1003 scene: &mut SceneBuilder,
1004 bounds: RectF,
1005 layout: &mut LayoutState,
1006 cx: &mut ViewContext<Editor>,
1007 ) {
1008 enum ScrollbarMouseHandlers {}
1009 if layout.mode != EditorMode::Full {
1010 return;
1011 }
1012
1013 let style = &self.style.theme.scrollbar;
1014
1015 let top = bounds.min_y();
1016 let bottom = bounds.max_y();
1017 let right = bounds.max_x();
1018 let left = right - style.width;
1019 let row_range = &layout.scrollbar_row_range;
1020 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1021
1022 let mut height = bounds.height();
1023 let mut first_row_y_offset = 0.0;
1024
1025 // Impose a minimum height on the scrollbar thumb
1026 let row_height = height / max_row;
1027 let min_thumb_height =
1028 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1029 let thumb_height = (row_range.end - row_range.start) * row_height;
1030 if thumb_height < min_thumb_height {
1031 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1032 height -= min_thumb_height - thumb_height;
1033 }
1034
1035 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1036
1037 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1038 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1039 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1040 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1041
1042 if layout.show_scrollbars {
1043 scene.push_quad(Quad {
1044 bounds: track_bounds,
1045 border: style.track.border,
1046 background: style.track.background_color,
1047 ..Default::default()
1048 });
1049
1050 if layout.is_singleton {
1051 let diff_style = cx.global::<Settings>().theme.editor.diff.clone();
1052 for hunk in layout
1053 .position_map
1054 .snapshot
1055 .buffer_snapshot
1056 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1057 {
1058 let start_display = Point::new(hunk.buffer_range.start, 0)
1059 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1060 let end_display = Point::new(hunk.buffer_range.end, 0)
1061 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1062 let start_y = y_for_row(start_display.row() as f32);
1063 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1064 y_for_row((end_display.row() + 1) as f32)
1065 } else {
1066 y_for_row((end_display.row()) as f32)
1067 };
1068
1069 if end_y - start_y < 1. {
1070 end_y = start_y + 1.;
1071 }
1072 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1073
1074 let color = match hunk.status() {
1075 DiffHunkStatus::Added => diff_style.inserted,
1076 DiffHunkStatus::Modified => diff_style.modified,
1077 DiffHunkStatus::Removed => diff_style.deleted,
1078 };
1079
1080 let border = Border {
1081 width: 1.,
1082 color: style.thumb.border.color,
1083 overlay: false,
1084 top: false,
1085 right: true,
1086 bottom: false,
1087 left: true,
1088 };
1089
1090 scene.push_quad(Quad {
1091 bounds,
1092 background: Some(color),
1093 border,
1094 corner_radius: style.thumb.corner_radius,
1095 })
1096 }
1097 }
1098
1099 scene.push_quad(Quad {
1100 bounds: thumb_bounds,
1101 border: style.thumb.border,
1102 background: style.thumb.background_color,
1103 corner_radius: style.thumb.corner_radius,
1104 });
1105 }
1106
1107 scene.push_cursor_region(CursorRegion {
1108 bounds: track_bounds,
1109 style: CursorStyle::Arrow,
1110 });
1111 scene.push_mouse_region(
1112 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1113 .on_move(move |_, editor: &mut Editor, cx| {
1114 editor.scroll_manager.show_scrollbar(cx);
1115 })
1116 .on_down(MouseButton::Left, {
1117 let row_range = row_range.clone();
1118 move |event, editor: &mut Editor, cx| {
1119 let y = event.position.y();
1120 if y < thumb_top || thumb_bottom < y {
1121 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1122 let top_row = center_row
1123 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1124 let mut position = editor.scroll_position(cx);
1125 position.set_y(top_row as f32);
1126 editor.set_scroll_position(position, cx);
1127 } else {
1128 editor.scroll_manager.show_scrollbar(cx);
1129 }
1130 }
1131 })
1132 .on_drag(MouseButton::Left, {
1133 move |event, editor: &mut Editor, cx| {
1134 let y = event.prev_mouse_position.y();
1135 let new_y = event.position.y();
1136 if thumb_top < y && y < thumb_bottom {
1137 let mut position = editor.scroll_position(cx);
1138 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1139 if position.y() < 0.0 {
1140 position.set_y(0.);
1141 }
1142 editor.set_scroll_position(position, cx);
1143 }
1144 }
1145 }),
1146 );
1147 }
1148
1149 #[allow(clippy::too_many_arguments)]
1150 fn paint_highlighted_range(
1151 &self,
1152 scene: &mut SceneBuilder,
1153 range: Range<DisplayPoint>,
1154 color: Color,
1155 corner_radius: f32,
1156 line_end_overshoot: f32,
1157 layout: &LayoutState,
1158 content_origin: Vector2F,
1159 scroll_top: f32,
1160 scroll_left: f32,
1161 bounds: RectF,
1162 ) {
1163 let start_row = layout.visible_display_row_range.start;
1164 let end_row = layout.visible_display_row_range.end;
1165 if range.start != range.end {
1166 let row_range = if range.end.column() == 0 {
1167 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1168 } else {
1169 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1170 };
1171
1172 let highlighted_range = HighlightedRange {
1173 color,
1174 line_height: layout.position_map.line_height,
1175 corner_radius,
1176 start_y: content_origin.y()
1177 + row_range.start as f32 * layout.position_map.line_height
1178 - scroll_top,
1179 lines: row_range
1180 .into_iter()
1181 .map(|row| {
1182 let line_layout =
1183 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1184 HighlightedRangeLine {
1185 start_x: if row == range.start.row() {
1186 content_origin.x()
1187 + line_layout.x_for_index(range.start.column() as usize)
1188 - scroll_left
1189 } else {
1190 content_origin.x() - scroll_left
1191 },
1192 end_x: if row == range.end.row() {
1193 content_origin.x()
1194 + line_layout.x_for_index(range.end.column() as usize)
1195 - scroll_left
1196 } else {
1197 content_origin.x() + line_layout.width() + line_end_overshoot
1198 - scroll_left
1199 },
1200 }
1201 })
1202 .collect(),
1203 };
1204
1205 highlighted_range.paint(bounds, scene);
1206 }
1207 }
1208
1209 fn paint_blocks(
1210 &mut self,
1211 scene: &mut SceneBuilder,
1212 bounds: RectF,
1213 visible_bounds: RectF,
1214 layout: &mut LayoutState,
1215 editor: &mut Editor,
1216 cx: &mut ViewContext<Editor>,
1217 ) {
1218 let scroll_position = layout.position_map.snapshot.scroll_position();
1219 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1220 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1221
1222 for block in &mut layout.blocks {
1223 let mut origin = bounds.origin()
1224 + vec2f(
1225 0.,
1226 block.row as f32 * layout.position_map.line_height - scroll_top,
1227 );
1228 if !matches!(block.style, BlockStyle::Sticky) {
1229 origin += vec2f(-scroll_left, 0.);
1230 }
1231 block
1232 .element
1233 .paint(scene, origin, visible_bounds, editor, cx);
1234 }
1235 }
1236
1237 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1238 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1239 let style = &self.style;
1240
1241 cx.text_layout_cache()
1242 .layout_str(
1243 "1".repeat(digit_count).as_str(),
1244 style.text.font_size,
1245 &[(
1246 digit_count,
1247 RunStyle {
1248 font_id: style.text.font_id,
1249 color: Color::black(),
1250 underline: Default::default(),
1251 },
1252 )],
1253 )
1254 .width()
1255 }
1256
1257 //Folds contained in a hunk are ignored apart from shrinking visual size
1258 //If a fold contains any hunks then that fold line is marked as modified
1259 fn layout_git_gutters(
1260 &self,
1261 display_rows: Range<u32>,
1262 snapshot: &EditorSnapshot,
1263 ) -> Vec<DisplayDiffHunk> {
1264 let buffer_snapshot = &snapshot.buffer_snapshot;
1265
1266 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1267 .to_point(snapshot)
1268 .row;
1269 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1270 .to_point(snapshot)
1271 .row;
1272
1273 buffer_snapshot
1274 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1275 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1276 .dedup()
1277 .collect()
1278 }
1279
1280 fn layout_line_numbers(
1281 &self,
1282 rows: Range<u32>,
1283 active_rows: &BTreeMap<u32, bool>,
1284 is_singleton: bool,
1285 snapshot: &EditorSnapshot,
1286 cx: &ViewContext<Editor>,
1287 ) -> (
1288 Vec<Option<text_layout::Line>>,
1289 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1290 ) {
1291 let style = &self.style;
1292 let include_line_numbers = snapshot.mode == EditorMode::Full;
1293 let mut line_number_layouts = Vec::with_capacity(rows.len());
1294 let mut fold_statuses = Vec::with_capacity(rows.len());
1295 let mut line_number = String::new();
1296 for (ix, row) in snapshot
1297 .buffer_rows(rows.start)
1298 .take((rows.end - rows.start) as usize)
1299 .enumerate()
1300 {
1301 let display_row = rows.start + ix as u32;
1302 let (active, color) = if active_rows.contains_key(&display_row) {
1303 (true, style.line_number_active)
1304 } else {
1305 (false, style.line_number)
1306 };
1307 if let Some(buffer_row) = row {
1308 if include_line_numbers {
1309 line_number.clear();
1310 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1311 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1312 &line_number,
1313 style.text.font_size,
1314 &[(
1315 line_number.len(),
1316 RunStyle {
1317 font_id: style.text.font_id,
1318 color,
1319 underline: Default::default(),
1320 },
1321 )],
1322 )));
1323 fold_statuses.push(
1324 is_singleton
1325 .then(|| {
1326 snapshot
1327 .fold_for_line(buffer_row)
1328 .map(|fold_status| (fold_status, buffer_row, active))
1329 })
1330 .flatten(),
1331 )
1332 }
1333 } else {
1334 fold_statuses.push(None);
1335 line_number_layouts.push(None);
1336 }
1337 }
1338
1339 (line_number_layouts, fold_statuses)
1340 }
1341
1342 fn layout_lines(
1343 &mut self,
1344 rows: Range<u32>,
1345 line_number_layouts: &[Option<Line>],
1346 snapshot: &EditorSnapshot,
1347 cx: &ViewContext<Editor>,
1348 ) -> Vec<LineWithInvisibles> {
1349 if rows.start >= rows.end {
1350 return Vec::new();
1351 }
1352
1353 // When the editor is empty and unfocused, then show the placeholder.
1354 if snapshot.is_empty() {
1355 let placeholder_style = self
1356 .style
1357 .placeholder_text
1358 .as_ref()
1359 .unwrap_or(&self.style.text);
1360 let placeholder_text = snapshot.placeholder_text();
1361 let placeholder_lines = placeholder_text
1362 .as_ref()
1363 .map_or("", AsRef::as_ref)
1364 .split('\n')
1365 .skip(rows.start as usize)
1366 .chain(iter::repeat(""))
1367 .take(rows.len());
1368 placeholder_lines
1369 .map(|line| {
1370 cx.text_layout_cache().layout_str(
1371 line,
1372 placeholder_style.font_size,
1373 &[(
1374 line.len(),
1375 RunStyle {
1376 font_id: placeholder_style.font_id,
1377 color: placeholder_style.color,
1378 underline: Default::default(),
1379 },
1380 )],
1381 )
1382 })
1383 .map(|line| LineWithInvisibles {
1384 line,
1385 invisibles: Vec::new(),
1386 })
1387 .collect()
1388 } else {
1389 let style = &self.style;
1390 let chunks = snapshot
1391 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1392 .map(|chunk| {
1393 let mut highlight_style = chunk
1394 .syntax_highlight_id
1395 .and_then(|id| id.style(&style.syntax));
1396
1397 if let Some(chunk_highlight) = chunk.highlight_style {
1398 if let Some(highlight_style) = highlight_style.as_mut() {
1399 highlight_style.highlight(chunk_highlight);
1400 } else {
1401 highlight_style = Some(chunk_highlight);
1402 }
1403 }
1404
1405 let mut diagnostic_highlight = HighlightStyle::default();
1406
1407 if chunk.is_unnecessary {
1408 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1409 }
1410
1411 if let Some(severity) = chunk.diagnostic_severity {
1412 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1413 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1414 let diagnostic_style = super::diagnostic_style(severity, true, style);
1415 diagnostic_highlight.underline = Some(Underline {
1416 color: Some(diagnostic_style.message.text.color),
1417 thickness: 1.0.into(),
1418 squiggly: true,
1419 });
1420 }
1421 }
1422
1423 if let Some(highlight_style) = highlight_style.as_mut() {
1424 highlight_style.highlight(diagnostic_highlight);
1425 } else {
1426 highlight_style = Some(diagnostic_highlight);
1427 }
1428
1429 HighlightedChunk {
1430 chunk: chunk.text,
1431 style: highlight_style,
1432 is_tab: chunk.is_tab,
1433 }
1434 });
1435
1436 LineWithInvisibles::from_chunks(
1437 chunks,
1438 &style.text,
1439 cx.text_layout_cache(),
1440 cx.font_cache(),
1441 MAX_LINE_LEN,
1442 rows.len() as usize,
1443 line_number_layouts,
1444 snapshot.mode,
1445 )
1446 }
1447 }
1448
1449 #[allow(clippy::too_many_arguments)]
1450 fn layout_blocks(
1451 &mut self,
1452 rows: Range<u32>,
1453 snapshot: &EditorSnapshot,
1454 editor_width: f32,
1455 scroll_width: f32,
1456 gutter_padding: f32,
1457 gutter_width: f32,
1458 em_width: f32,
1459 text_x: f32,
1460 line_height: f32,
1461 style: &EditorStyle,
1462 line_layouts: &[LineWithInvisibles],
1463 include_root: bool,
1464 editor: &mut Editor,
1465 cx: &mut LayoutContext<Editor>,
1466 ) -> (f32, Vec<BlockLayout>) {
1467 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1468 let scroll_x = snapshot.scroll_anchor.offset.x();
1469 let (fixed_blocks, non_fixed_blocks) = snapshot
1470 .blocks_in_range(rows.clone())
1471 .partition::<Vec<_>, _>(|(_, block)| match block {
1472 TransformBlock::ExcerptHeader { .. } => false,
1473 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1474 });
1475 let mut render_block = |block: &TransformBlock, width: f32| {
1476 let mut element = match block {
1477 TransformBlock::Custom(block) => {
1478 let align_to = block
1479 .position()
1480 .to_point(&snapshot.buffer_snapshot)
1481 .to_display_point(snapshot);
1482 let anchor_x = text_x
1483 + if rows.contains(&align_to.row()) {
1484 line_layouts[(align_to.row() - rows.start) as usize]
1485 .line
1486 .x_for_index(align_to.column() as usize)
1487 } else {
1488 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1489 .x_for_index(align_to.column() as usize)
1490 };
1491
1492 block.render(&mut BlockContext {
1493 view_context: cx,
1494 anchor_x,
1495 gutter_padding,
1496 line_height,
1497 scroll_x,
1498 gutter_width,
1499 em_width,
1500 })
1501 }
1502 TransformBlock::ExcerptHeader {
1503 id,
1504 buffer,
1505 range,
1506 starts_new_buffer,
1507 ..
1508 } => {
1509 let id = *id;
1510 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1511 let jump_path = ProjectPath {
1512 worktree_id: file.worktree_id(cx),
1513 path: file.path.clone(),
1514 };
1515 let jump_anchor = range
1516 .primary
1517 .as_ref()
1518 .map_or(range.context.start, |primary| primary.start);
1519 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1520
1521 enum JumpIcon {}
1522 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
1523 let style = style.jump_icon.style_for(state, false);
1524 Svg::new("icons/arrow_up_right_8.svg")
1525 .with_color(style.color)
1526 .constrained()
1527 .with_width(style.icon_width)
1528 .aligned()
1529 .contained()
1530 .with_style(style.container)
1531 .constrained()
1532 .with_width(style.button_width)
1533 .with_height(style.button_width)
1534 })
1535 .with_cursor_style(CursorStyle::PointingHand)
1536 .on_click(MouseButton::Left, move |_, editor, cx| {
1537 if let Some(workspace) = editor
1538 .workspace
1539 .as_ref()
1540 .and_then(|(workspace, _)| workspace.upgrade(cx))
1541 {
1542 workspace.update(cx, |workspace, cx| {
1543 Editor::jump(
1544 workspace,
1545 jump_path.clone(),
1546 jump_position,
1547 jump_anchor,
1548 cx,
1549 );
1550 });
1551 }
1552 })
1553 .with_tooltip::<JumpIcon>(
1554 id.into(),
1555 "Jump to Buffer".to_string(),
1556 Some(Box::new(crate::OpenExcerpts)),
1557 tooltip_style.clone(),
1558 cx,
1559 )
1560 .aligned()
1561 .flex_float()
1562 });
1563
1564 if *starts_new_buffer {
1565 let style = &self.style.diagnostic_path_header;
1566 let font_size =
1567 (style.text_scale_factor * self.style.text.font_size).round();
1568
1569 let path = buffer.resolve_file_path(cx, include_root);
1570 let mut filename = None;
1571 let mut parent_path = None;
1572 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1573 if let Some(path) = path {
1574 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1575 parent_path =
1576 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1577 }
1578
1579 Flex::row()
1580 .with_child(
1581 Label::new(
1582 filename.unwrap_or_else(|| "untitled".to_string()),
1583 style.filename.text.clone().with_font_size(font_size),
1584 )
1585 .contained()
1586 .with_style(style.filename.container)
1587 .aligned(),
1588 )
1589 .with_children(parent_path.map(|path| {
1590 Label::new(path, style.path.text.clone().with_font_size(font_size))
1591 .contained()
1592 .with_style(style.path.container)
1593 .aligned()
1594 }))
1595 .with_children(jump_icon)
1596 .contained()
1597 .with_style(style.container)
1598 .with_padding_left(gutter_padding)
1599 .with_padding_right(gutter_padding)
1600 .expanded()
1601 .into_any_named("path header block")
1602 } else {
1603 let text_style = self.style.text.clone();
1604 Flex::row()
1605 .with_child(Label::new("⋯", text_style))
1606 .with_children(jump_icon)
1607 .contained()
1608 .with_padding_left(gutter_padding)
1609 .with_padding_right(gutter_padding)
1610 .expanded()
1611 .into_any_named("collapsed context")
1612 }
1613 }
1614 };
1615
1616 element.layout(
1617 SizeConstraint {
1618 min: Vector2F::zero(),
1619 max: vec2f(width, block.height() as f32 * line_height),
1620 },
1621 editor,
1622 cx,
1623 );
1624 element
1625 };
1626
1627 let mut fixed_block_max_width = 0f32;
1628 let mut blocks = Vec::new();
1629 for (row, block) in fixed_blocks {
1630 let element = render_block(block, f32::INFINITY);
1631 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1632 blocks.push(BlockLayout {
1633 row,
1634 element,
1635 style: BlockStyle::Fixed,
1636 });
1637 }
1638 for (row, block) in non_fixed_blocks {
1639 let style = match block {
1640 TransformBlock::Custom(block) => block.style(),
1641 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1642 };
1643 let width = match style {
1644 BlockStyle::Sticky => editor_width,
1645 BlockStyle::Flex => editor_width
1646 .max(fixed_block_max_width)
1647 .max(gutter_width + scroll_width),
1648 BlockStyle::Fixed => unreachable!(),
1649 };
1650 let element = render_block(block, width);
1651 blocks.push(BlockLayout {
1652 row,
1653 element,
1654 style,
1655 });
1656 }
1657 (
1658 scroll_width.max(fixed_block_max_width - gutter_width),
1659 blocks,
1660 )
1661 }
1662}
1663
1664struct HighlightedChunk<'a> {
1665 chunk: &'a str,
1666 style: Option<HighlightStyle>,
1667 is_tab: bool,
1668}
1669
1670#[derive(Debug)]
1671pub struct LineWithInvisibles {
1672 pub line: Line,
1673 invisibles: Vec<Invisible>,
1674}
1675
1676impl LineWithInvisibles {
1677 fn from_chunks<'a>(
1678 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1679 text_style: &TextStyle,
1680 text_layout_cache: &TextLayoutCache,
1681 font_cache: &Arc<FontCache>,
1682 max_line_len: usize,
1683 max_line_count: usize,
1684 line_number_layouts: &[Option<Line>],
1685 editor_mode: EditorMode,
1686 ) -> Vec<Self> {
1687 let mut layouts = Vec::with_capacity(max_line_count);
1688 let mut line = String::new();
1689 let mut invisibles = Vec::new();
1690 let mut styles = Vec::new();
1691 let mut non_whitespace_added = false;
1692 let mut row = 0;
1693 let mut line_exceeded_max_len = false;
1694 for highlighted_chunk in chunks.chain([HighlightedChunk {
1695 chunk: "\n",
1696 style: None,
1697 is_tab: false,
1698 }]) {
1699 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1700 if ix > 0 {
1701 layouts.push(Self {
1702 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1703 invisibles: invisibles.drain(..).collect(),
1704 });
1705
1706 line.clear();
1707 styles.clear();
1708 row += 1;
1709 line_exceeded_max_len = false;
1710 non_whitespace_added = false;
1711 if row == max_line_count {
1712 return layouts;
1713 }
1714 }
1715
1716 if !line_chunk.is_empty() && !line_exceeded_max_len {
1717 let text_style = if let Some(style) = highlighted_chunk.style {
1718 text_style
1719 .clone()
1720 .highlight(style, font_cache)
1721 .map(Cow::Owned)
1722 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1723 } else {
1724 Cow::Borrowed(text_style)
1725 };
1726
1727 if line.len() + line_chunk.len() > max_line_len {
1728 let mut chunk_len = max_line_len - line.len();
1729 while !line_chunk.is_char_boundary(chunk_len) {
1730 chunk_len -= 1;
1731 }
1732 line_chunk = &line_chunk[..chunk_len];
1733 line_exceeded_max_len = true;
1734 }
1735
1736 styles.push((
1737 line_chunk.len(),
1738 RunStyle {
1739 font_id: text_style.font_id,
1740 color: text_style.color,
1741 underline: text_style.underline,
1742 },
1743 ));
1744
1745 if editor_mode == EditorMode::Full {
1746 // Line wrap pads its contents with fake whitespaces,
1747 // avoid printing them
1748 let inside_wrapped_string = line_number_layouts
1749 .get(row)
1750 .and_then(|layout| layout.as_ref())
1751 .is_none();
1752 if highlighted_chunk.is_tab {
1753 if non_whitespace_added || !inside_wrapped_string {
1754 invisibles.push(Invisible::Tab {
1755 line_start_offset: line.len(),
1756 });
1757 }
1758 } else {
1759 invisibles.extend(
1760 line_chunk
1761 .chars()
1762 .enumerate()
1763 .filter(|(_, line_char)| {
1764 let is_whitespace = line_char.is_whitespace();
1765 non_whitespace_added |= !is_whitespace;
1766 is_whitespace
1767 && (non_whitespace_added || !inside_wrapped_string)
1768 })
1769 .map(|(whitespace_index, _)| Invisible::Whitespace {
1770 line_offset: line.len() + whitespace_index,
1771 }),
1772 )
1773 }
1774 }
1775
1776 line.push_str(line_chunk);
1777 }
1778 }
1779 }
1780
1781 layouts
1782 }
1783
1784 fn draw(
1785 &self,
1786 layout: &LayoutState,
1787 row: u32,
1788 scroll_top: f32,
1789 scene: &mut SceneBuilder,
1790 content_origin: Vector2F,
1791 scroll_left: f32,
1792 visible_text_bounds: RectF,
1793 cx: &mut ViewContext<Editor>,
1794 selection_ranges: &[Range<DisplayPoint>],
1795 visible_bounds: RectF,
1796 ) {
1797 let line_height = layout.position_map.line_height;
1798 let line_y = row as f32 * line_height - scroll_top;
1799
1800 self.line.paint(
1801 scene,
1802 content_origin + vec2f(-scroll_left, line_y),
1803 visible_text_bounds,
1804 line_height,
1805 cx,
1806 );
1807
1808 self.draw_invisibles(
1809 cx,
1810 &selection_ranges,
1811 layout,
1812 content_origin,
1813 scroll_left,
1814 line_y,
1815 row,
1816 scene,
1817 visible_bounds,
1818 line_height,
1819 );
1820 }
1821
1822 fn draw_invisibles(
1823 &self,
1824 cx: &mut ViewContext<Editor>,
1825 selection_ranges: &[Range<DisplayPoint>],
1826 layout: &LayoutState,
1827 content_origin: Vector2F,
1828 scroll_left: f32,
1829 line_y: f32,
1830 row: u32,
1831 scene: &mut SceneBuilder,
1832 visible_bounds: RectF,
1833 line_height: f32,
1834 ) {
1835 let settings = cx.global::<Settings>();
1836 let allowed_invisibles_regions = match settings
1837 .editor_overrides
1838 .show_whitespaces
1839 .or(settings.editor_defaults.show_whitespaces)
1840 .unwrap_or_default()
1841 {
1842 ShowWhitespaces::None => return,
1843 ShowWhitespaces::Selection => Some(selection_ranges),
1844 ShowWhitespaces::All => None,
1845 };
1846
1847 for invisible in &self.invisibles {
1848 let (&token_offset, invisible_symbol) = match invisible {
1849 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1850 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1851 };
1852
1853 let x_offset = self.line.x_for_index(token_offset);
1854 let invisible_offset =
1855 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1856 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1857
1858 if let Some(allowed_regions) = allowed_invisibles_regions {
1859 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1860 if !allowed_regions
1861 .iter()
1862 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1863 {
1864 continue;
1865 }
1866 }
1867 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1868 }
1869 }
1870}
1871
1872#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1873enum Invisible {
1874 Tab { line_start_offset: usize },
1875 Whitespace { line_offset: usize },
1876}
1877
1878impl Element<Editor> for EditorElement {
1879 type LayoutState = LayoutState;
1880 type PaintState = ();
1881
1882 fn layout(
1883 &mut self,
1884 constraint: SizeConstraint,
1885 editor: &mut Editor,
1886 cx: &mut LayoutContext<Editor>,
1887 ) -> (Vector2F, Self::LayoutState) {
1888 let mut size = constraint.max;
1889 if size.x().is_infinite() {
1890 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1891 }
1892
1893 let snapshot = editor.snapshot(cx);
1894 let style = self.style.clone();
1895 let line_height = style.text.line_height(cx.font_cache());
1896
1897 let gutter_padding;
1898 let gutter_width;
1899 let gutter_margin;
1900 if snapshot.mode == EditorMode::Full {
1901 let em_width = style.text.em_width(cx.font_cache());
1902 gutter_padding = (em_width * style.gutter_padding_factor).round();
1903 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1904 gutter_margin = -style.text.descent(cx.font_cache());
1905 } else {
1906 gutter_padding = 0.0;
1907 gutter_width = 0.0;
1908 gutter_margin = 0.0;
1909 };
1910
1911 let text_width = size.x() - gutter_width;
1912 let em_width = style.text.em_width(cx.font_cache());
1913 let em_advance = style.text.em_advance(cx.font_cache());
1914 let overscroll = vec2f(em_width, 0.);
1915 let snapshot = {
1916 editor.set_visible_line_count(size.y() / line_height);
1917
1918 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1919 let wrap_width = match editor.soft_wrap_mode(cx) {
1920 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1921 SoftWrap::EditorWidth => editor_width,
1922 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1923 };
1924
1925 if editor.set_wrap_width(Some(wrap_width), cx) {
1926 editor.snapshot(cx)
1927 } else {
1928 snapshot
1929 }
1930 };
1931
1932 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1933 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1934 size.set_y(
1935 scroll_height
1936 .min(constraint.max_along(Axis::Vertical))
1937 .max(constraint.min_along(Axis::Vertical))
1938 .min(line_height * max_lines as f32),
1939 )
1940 } else if let EditorMode::SingleLine = snapshot.mode {
1941 size.set_y(
1942 line_height
1943 .min(constraint.max_along(Axis::Vertical))
1944 .max(constraint.min_along(Axis::Vertical)),
1945 )
1946 } else if size.y().is_infinite() {
1947 size.set_y(scroll_height);
1948 }
1949 let gutter_size = vec2f(gutter_width, size.y());
1950 let text_size = vec2f(text_width, size.y());
1951
1952 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1953 let mut snapshot = editor.snapshot(cx);
1954
1955 let scroll_position = snapshot.scroll_position();
1956 // The scroll position is a fractional point, the whole number of which represents
1957 // the top of the window in terms of display rows.
1958 let start_row = scroll_position.y() as u32;
1959 let height_in_lines = size.y() / line_height;
1960 let max_row = snapshot.max_point().row();
1961
1962 // Add 1 to ensure selections bleed off screen
1963 let end_row = 1 + cmp::min(
1964 (scroll_position.y() + height_in_lines).ceil() as u32,
1965 max_row,
1966 );
1967
1968 let start_anchor = if start_row == 0 {
1969 Anchor::min()
1970 } else {
1971 snapshot
1972 .buffer_snapshot
1973 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1974 };
1975 let end_anchor = if end_row > max_row {
1976 Anchor::max()
1977 } else {
1978 snapshot
1979 .buffer_snapshot
1980 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1981 };
1982
1983 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1984 let mut active_rows = BTreeMap::new();
1985 let mut fold_ranges = Vec::new();
1986 let is_singleton = editor.is_singleton(cx);
1987
1988 let highlighted_rows = editor.highlighted_rows();
1989 let theme = cx.global::<Settings>().theme.as_ref();
1990 let highlighted_ranges = editor.background_highlights_in_range(
1991 start_anchor..end_anchor,
1992 &snapshot.display_snapshot,
1993 theme,
1994 );
1995
1996 fold_ranges.extend(
1997 snapshot
1998 .folds_in_range(start_anchor..end_anchor)
1999 .map(|anchor| {
2000 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2001 (
2002 start.row,
2003 start.to_display_point(&snapshot.display_snapshot)
2004 ..anchor.end.to_display_point(&snapshot),
2005 )
2006 }),
2007 );
2008
2009 let mut remote_selections = HashMap::default();
2010 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2011 .buffer_snapshot
2012 .remote_selections_in_range(&(start_anchor..end_anchor))
2013 {
2014 // The local selections match the leader's selections.
2015 if Some(replica_id) == editor.leader_replica_id {
2016 continue;
2017 }
2018 remote_selections
2019 .entry(replica_id)
2020 .or_insert(Vec::new())
2021 .push(SelectionLayout::new(
2022 selection,
2023 line_mode,
2024 cursor_shape,
2025 &snapshot.display_snapshot,
2026 ));
2027 }
2028 selections.extend(remote_selections);
2029
2030 if editor.show_local_selections {
2031 let mut local_selections = editor
2032 .selections
2033 .disjoint_in_range(start_anchor..end_anchor, cx);
2034 local_selections.extend(editor.selections.pending(cx));
2035 for selection in &local_selections {
2036 let is_empty = selection.start == selection.end;
2037 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2038 let selection_end = snapshot.next_line_boundary(selection.end).1;
2039 for row in cmp::max(selection_start.row(), start_row)
2040 ..=cmp::min(selection_end.row(), end_row)
2041 {
2042 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2043 *contains_non_empty_selection |= !is_empty;
2044 }
2045 }
2046
2047 // Render the local selections in the leader's color when following.
2048 let local_replica_id = editor
2049 .leader_replica_id
2050 .unwrap_or_else(|| editor.replica_id(cx));
2051
2052 selections.push((
2053 local_replica_id,
2054 local_selections
2055 .into_iter()
2056 .map(|selection| {
2057 SelectionLayout::new(
2058 selection,
2059 editor.selections.line_mode,
2060 editor.cursor_shape,
2061 &snapshot.display_snapshot,
2062 )
2063 })
2064 .collect(),
2065 ));
2066 }
2067
2068 let show_scrollbars = match cx.global::<Settings>().show_scrollbars {
2069 settings::ShowScrollbars::Auto => {
2070 snapshot.has_scrollbar_info(is_singleton)
2071 || editor.scroll_manager.scrollbars_visible()
2072 }
2073 settings::ShowScrollbars::System => editor.scroll_manager.scrollbars_visible(),
2074 settings::ShowScrollbars::Always => true,
2075 settings::ShowScrollbars::Never => false,
2076 };
2077
2078 let include_root = editor
2079 .project
2080 .as_ref()
2081 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2082 .unwrap_or_default();
2083
2084 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2085 .into_iter()
2086 .map(|(id, fold)| {
2087 let color = self
2088 .style
2089 .folds
2090 .ellipses
2091 .background
2092 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
2093 .color;
2094
2095 (id, fold, color)
2096 })
2097 .collect();
2098
2099 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2100 start_row..end_row,
2101 &active_rows,
2102 is_singleton,
2103 &snapshot,
2104 cx,
2105 );
2106
2107 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2108
2109 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2110
2111 let mut max_visible_line_width = 0.0;
2112 let line_layouts =
2113 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2114 for line_with_invisibles in &line_layouts {
2115 if line_with_invisibles.line.width() > max_visible_line_width {
2116 max_visible_line_width = line_with_invisibles.line.width();
2117 }
2118 }
2119
2120 let style = self.style.clone();
2121 let longest_line_width = layout_line(
2122 snapshot.longest_row(),
2123 &snapshot,
2124 &style,
2125 cx.text_layout_cache(),
2126 )
2127 .width();
2128 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2129 let em_width = style.text.em_width(cx.font_cache());
2130 let (scroll_width, blocks) = self.layout_blocks(
2131 start_row..end_row,
2132 &snapshot,
2133 size.x(),
2134 scroll_width,
2135 gutter_padding,
2136 gutter_width,
2137 em_width,
2138 gutter_width + gutter_margin,
2139 line_height,
2140 &style,
2141 &line_layouts,
2142 include_root,
2143 editor,
2144 cx,
2145 );
2146
2147 let scroll_max = vec2f(
2148 ((scroll_width - text_size.x()) / em_width).max(0.0),
2149 max_row as f32,
2150 );
2151
2152 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2153
2154 let autoscrolled = if autoscroll_horizontally {
2155 editor.autoscroll_horizontally(
2156 start_row,
2157 text_size.x(),
2158 scroll_width,
2159 em_width,
2160 &line_layouts,
2161 cx,
2162 )
2163 } else {
2164 false
2165 };
2166
2167 if clamped || autoscrolled {
2168 snapshot = editor.snapshot(cx);
2169 }
2170
2171 let newest_selection_head = editor
2172 .selections
2173 .newest::<usize>(cx)
2174 .head()
2175 .to_display_point(&snapshot);
2176 let style = editor.style(cx);
2177
2178 let mut context_menu = None;
2179 let mut code_actions_indicator = None;
2180 if (start_row..end_row).contains(&newest_selection_head.row()) {
2181 if editor.context_menu_visible() {
2182 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2183 }
2184
2185 let active = matches!(
2186 editor.context_menu,
2187 Some(crate::ContextMenu::CodeActions(_))
2188 );
2189
2190 code_actions_indicator = editor
2191 .render_code_actions_indicator(&style, active, cx)
2192 .map(|indicator| (newest_selection_head.row(), indicator));
2193 }
2194
2195 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2196 let mut hover = editor
2197 .hover_state
2198 .render(&snapshot, &style, visible_rows, cx);
2199 let mode = editor.mode;
2200
2201 let mut fold_indicators = editor.render_fold_indicators(
2202 fold_statuses,
2203 &style,
2204 editor.gutter_hovered,
2205 line_height,
2206 gutter_margin,
2207 cx,
2208 );
2209
2210 if let Some((_, context_menu)) = context_menu.as_mut() {
2211 context_menu.layout(
2212 SizeConstraint {
2213 min: Vector2F::zero(),
2214 max: vec2f(
2215 cx.window_size().x() * 0.7,
2216 (12. * line_height).min((size.y() - line_height) / 2.),
2217 ),
2218 },
2219 editor,
2220 cx,
2221 );
2222 }
2223
2224 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2225 indicator.layout(
2226 SizeConstraint::strict_along(
2227 Axis::Vertical,
2228 line_height * style.code_actions.vertical_scale,
2229 ),
2230 editor,
2231 cx,
2232 );
2233 }
2234
2235 for fold_indicator in fold_indicators.iter_mut() {
2236 if let Some(indicator) = fold_indicator.as_mut() {
2237 indicator.layout(
2238 SizeConstraint::strict_along(
2239 Axis::Vertical,
2240 line_height * style.code_actions.vertical_scale,
2241 ),
2242 editor,
2243 cx,
2244 );
2245 }
2246 }
2247
2248 if let Some((_, hover_popovers)) = hover.as_mut() {
2249 for hover_popover in hover_popovers.iter_mut() {
2250 hover_popover.layout(
2251 SizeConstraint {
2252 min: Vector2F::zero(),
2253 max: vec2f(
2254 (120. * em_width) // Default size
2255 .min(size.x() / 2.) // Shrink to half of the editor width
2256 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2257 (16. * line_height) // Default size
2258 .min(size.y() / 2.) // Shrink to half of the editor height
2259 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2260 ),
2261 },
2262 editor,
2263 cx,
2264 );
2265 }
2266 }
2267
2268 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2269 let invisible_symbol_style = RunStyle {
2270 color: self.style.whitespace,
2271 font_id: self.style.text.font_id,
2272 underline: Default::default(),
2273 };
2274
2275 (
2276 size,
2277 LayoutState {
2278 mode,
2279 position_map: Arc::new(PositionMap {
2280 size,
2281 scroll_max,
2282 line_layouts,
2283 line_height,
2284 em_width,
2285 em_advance,
2286 snapshot,
2287 }),
2288 visible_display_row_range: start_row..end_row,
2289 gutter_size,
2290 gutter_padding,
2291 text_size,
2292 scrollbar_row_range,
2293 show_scrollbars,
2294 is_singleton,
2295 max_row,
2296 gutter_margin,
2297 active_rows,
2298 highlighted_rows,
2299 highlighted_ranges,
2300 fold_ranges,
2301 line_number_layouts,
2302 display_hunks,
2303 blocks,
2304 selections,
2305 context_menu,
2306 code_actions_indicator,
2307 fold_indicators,
2308 tab_invisible: cx.text_layout_cache().layout_str(
2309 "→",
2310 invisible_symbol_font_size,
2311 &[("→".len(), invisible_symbol_style)],
2312 ),
2313 space_invisible: cx.text_layout_cache().layout_str(
2314 "•",
2315 invisible_symbol_font_size,
2316 &[("•".len(), invisible_symbol_style)],
2317 ),
2318 hover_popovers: hover,
2319 },
2320 )
2321 }
2322
2323 fn paint(
2324 &mut self,
2325 scene: &mut SceneBuilder,
2326 bounds: RectF,
2327 visible_bounds: RectF,
2328 layout: &mut Self::LayoutState,
2329 editor: &mut Editor,
2330 cx: &mut ViewContext<Editor>,
2331 ) -> Self::PaintState {
2332 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2333 scene.push_layer(Some(visible_bounds));
2334
2335 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2336 let text_bounds = RectF::new(
2337 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2338 layout.text_size,
2339 );
2340
2341 Self::attach_mouse_handlers(
2342 scene,
2343 &layout.position_map,
2344 layout.hover_popovers.is_some(),
2345 visible_bounds,
2346 text_bounds,
2347 gutter_bounds,
2348 bounds,
2349 cx,
2350 );
2351
2352 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2353 if layout.gutter_size.x() > 0. {
2354 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2355 }
2356 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2357
2358 scene.push_layer(Some(bounds));
2359 if !layout.blocks.is_empty() {
2360 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2361 }
2362 self.paint_scrollbar(scene, bounds, layout, cx);
2363 scene.pop_layer();
2364
2365 scene.pop_layer();
2366 }
2367
2368 fn rect_for_text_range(
2369 &self,
2370 range_utf16: Range<usize>,
2371 bounds: RectF,
2372 _: RectF,
2373 layout: &Self::LayoutState,
2374 _: &Self::PaintState,
2375 _: &Editor,
2376 _: &ViewContext<Editor>,
2377 ) -> Option<RectF> {
2378 let text_bounds = RectF::new(
2379 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2380 layout.text_size,
2381 );
2382 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2383 let scroll_position = layout.position_map.snapshot.scroll_position();
2384 let start_row = scroll_position.y() as u32;
2385 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2386 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2387
2388 let range_start = OffsetUtf16(range_utf16.start)
2389 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2390 if range_start.row() < start_row {
2391 return None;
2392 }
2393
2394 let line = &layout
2395 .position_map
2396 .line_layouts
2397 .get((range_start.row() - start_row) as usize)?
2398 .line;
2399 let range_start_x = line.x_for_index(range_start.column() as usize);
2400 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2401 Some(RectF::new(
2402 content_origin
2403 + vec2f(
2404 range_start_x,
2405 range_start_y + layout.position_map.line_height,
2406 )
2407 - vec2f(scroll_left, scroll_top),
2408 vec2f(
2409 layout.position_map.em_width,
2410 layout.position_map.line_height,
2411 ),
2412 ))
2413 }
2414
2415 fn debug(
2416 &self,
2417 bounds: RectF,
2418 _: &Self::LayoutState,
2419 _: &Self::PaintState,
2420 _: &Editor,
2421 _: &ViewContext<Editor>,
2422 ) -> json::Value {
2423 json!({
2424 "type": "BufferElement",
2425 "bounds": bounds.to_json()
2426 })
2427 }
2428}
2429
2430type BufferRow = u32;
2431
2432pub struct LayoutState {
2433 position_map: Arc<PositionMap>,
2434 gutter_size: Vector2F,
2435 gutter_padding: f32,
2436 gutter_margin: f32,
2437 text_size: Vector2F,
2438 mode: EditorMode,
2439 visible_display_row_range: Range<u32>,
2440 active_rows: BTreeMap<u32, bool>,
2441 highlighted_rows: Option<Range<u32>>,
2442 line_number_layouts: Vec<Option<text_layout::Line>>,
2443 display_hunks: Vec<DisplayDiffHunk>,
2444 blocks: Vec<BlockLayout>,
2445 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2446 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2447 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2448 scrollbar_row_range: Range<f32>,
2449 show_scrollbars: bool,
2450 is_singleton: bool,
2451 max_row: u32,
2452 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2453 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2454 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2455 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2456 tab_invisible: Line,
2457 space_invisible: Line,
2458}
2459
2460struct PositionMap {
2461 size: Vector2F,
2462 line_height: f32,
2463 scroll_max: Vector2F,
2464 em_width: f32,
2465 em_advance: f32,
2466 line_layouts: Vec<LineWithInvisibles>,
2467 snapshot: EditorSnapshot,
2468}
2469
2470impl PositionMap {
2471 /// Returns two display points:
2472 /// 1. The nearest *valid* position in the editor
2473 /// 2. An unclipped, potentially *invalid* position that maps directly to
2474 /// the given pixel position.
2475 fn point_for_position(
2476 &self,
2477 text_bounds: RectF,
2478 position: Vector2F,
2479 ) -> (DisplayPoint, DisplayPoint) {
2480 let scroll_position = self.snapshot.scroll_position();
2481 let position = position - text_bounds.origin();
2482 let y = position.y().max(0.0).min(self.size.y());
2483 let x = position.x() + (scroll_position.x() * self.em_width);
2484 let row = (y / self.line_height + scroll_position.y()) as u32;
2485 let (column, x_overshoot) = if let Some(line) = self
2486 .line_layouts
2487 .get(row as usize - scroll_position.y() as usize)
2488 .map(|line_with_spaces| &line_with_spaces.line)
2489 {
2490 if let Some(ix) = line.index_for_x(x) {
2491 (ix as u32, 0.0)
2492 } else {
2493 (line.len() as u32, 0f32.max(x - line.width()))
2494 }
2495 } else {
2496 (0, x)
2497 };
2498
2499 let mut target_point = DisplayPoint::new(row, column);
2500 let point = self.snapshot.clip_point(target_point, Bias::Left);
2501 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2502
2503 (point, target_point)
2504 }
2505}
2506
2507struct BlockLayout {
2508 row: u32,
2509 element: AnyElement<Editor>,
2510 style: BlockStyle,
2511}
2512
2513fn layout_line(
2514 row: u32,
2515 snapshot: &EditorSnapshot,
2516 style: &EditorStyle,
2517 layout_cache: &TextLayoutCache,
2518) -> text_layout::Line {
2519 let mut line = snapshot.line(row);
2520
2521 if line.len() > MAX_LINE_LEN {
2522 let mut len = MAX_LINE_LEN;
2523 while !line.is_char_boundary(len) {
2524 len -= 1;
2525 }
2526
2527 line.truncate(len);
2528 }
2529
2530 layout_cache.layout_str(
2531 &line,
2532 style.text.font_size,
2533 &[(
2534 snapshot.line_len(row) as usize,
2535 RunStyle {
2536 font_id: style.text.font_id,
2537 color: Color::black(),
2538 underline: Default::default(),
2539 },
2540 )],
2541 )
2542}
2543
2544#[derive(Debug)]
2545pub struct Cursor {
2546 origin: Vector2F,
2547 block_width: f32,
2548 line_height: f32,
2549 color: Color,
2550 shape: CursorShape,
2551 block_text: Option<Line>,
2552}
2553
2554impl Cursor {
2555 pub fn new(
2556 origin: Vector2F,
2557 block_width: f32,
2558 line_height: f32,
2559 color: Color,
2560 shape: CursorShape,
2561 block_text: Option<Line>,
2562 ) -> Cursor {
2563 Cursor {
2564 origin,
2565 block_width,
2566 line_height,
2567 color,
2568 shape,
2569 block_text,
2570 }
2571 }
2572
2573 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2574 RectF::new(
2575 self.origin + origin,
2576 vec2f(self.block_width, self.line_height),
2577 )
2578 }
2579
2580 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2581 let bounds = match self.shape {
2582 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2583 CursorShape::Block | CursorShape::Hollow => RectF::new(
2584 self.origin + origin,
2585 vec2f(self.block_width, self.line_height),
2586 ),
2587 CursorShape::Underscore => RectF::new(
2588 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2589 vec2f(self.block_width, 2.0),
2590 ),
2591 };
2592
2593 //Draw background or border quad
2594 if matches!(self.shape, CursorShape::Hollow) {
2595 scene.push_quad(Quad {
2596 bounds,
2597 background: None,
2598 border: Border::all(1., self.color),
2599 corner_radius: 0.,
2600 });
2601 } else {
2602 scene.push_quad(Quad {
2603 bounds,
2604 background: Some(self.color),
2605 border: Default::default(),
2606 corner_radius: 0.,
2607 });
2608 }
2609
2610 if let Some(block_text) = &self.block_text {
2611 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2612 }
2613 }
2614
2615 pub fn shape(&self) -> CursorShape {
2616 self.shape
2617 }
2618}
2619
2620#[derive(Debug)]
2621pub struct HighlightedRange {
2622 pub start_y: f32,
2623 pub line_height: f32,
2624 pub lines: Vec<HighlightedRangeLine>,
2625 pub color: Color,
2626 pub corner_radius: f32,
2627}
2628
2629#[derive(Debug)]
2630pub struct HighlightedRangeLine {
2631 pub start_x: f32,
2632 pub end_x: f32,
2633}
2634
2635impl HighlightedRange {
2636 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2637 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2638 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2639 self.paint_lines(
2640 self.start_y + self.line_height,
2641 &self.lines[1..],
2642 bounds,
2643 scene,
2644 );
2645 } else {
2646 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2647 }
2648 }
2649
2650 fn paint_lines(
2651 &self,
2652 start_y: f32,
2653 lines: &[HighlightedRangeLine],
2654 bounds: RectF,
2655 scene: &mut SceneBuilder,
2656 ) {
2657 if lines.is_empty() {
2658 return;
2659 }
2660
2661 let mut path = PathBuilder::new();
2662 let first_line = lines.first().unwrap();
2663 let last_line = lines.last().unwrap();
2664
2665 let first_top_left = vec2f(first_line.start_x, start_y);
2666 let first_top_right = vec2f(first_line.end_x, start_y);
2667
2668 let curve_height = vec2f(0., self.corner_radius);
2669 let curve_width = |start_x: f32, end_x: f32| {
2670 let max = (end_x - start_x) / 2.;
2671 let width = if max < self.corner_radius {
2672 max
2673 } else {
2674 self.corner_radius
2675 };
2676
2677 vec2f(width, 0.)
2678 };
2679
2680 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2681 path.reset(first_top_right - top_curve_width);
2682 path.curve_to(first_top_right + curve_height, first_top_right);
2683
2684 let mut iter = lines.iter().enumerate().peekable();
2685 while let Some((ix, line)) = iter.next() {
2686 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2687
2688 if let Some((_, next_line)) = iter.peek() {
2689 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2690
2691 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2692 Ordering::Equal => {
2693 path.line_to(bottom_right);
2694 }
2695 Ordering::Less => {
2696 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2697 path.line_to(bottom_right - curve_height);
2698 if self.corner_radius > 0. {
2699 path.curve_to(bottom_right - curve_width, bottom_right);
2700 }
2701 path.line_to(next_top_right + curve_width);
2702 if self.corner_radius > 0. {
2703 path.curve_to(next_top_right + curve_height, next_top_right);
2704 }
2705 }
2706 Ordering::Greater => {
2707 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2708 path.line_to(bottom_right - curve_height);
2709 if self.corner_radius > 0. {
2710 path.curve_to(bottom_right + curve_width, bottom_right);
2711 }
2712 path.line_to(next_top_right - curve_width);
2713 if self.corner_radius > 0. {
2714 path.curve_to(next_top_right + curve_height, next_top_right);
2715 }
2716 }
2717 }
2718 } else {
2719 let curve_width = curve_width(line.start_x, line.end_x);
2720 path.line_to(bottom_right - curve_height);
2721 if self.corner_radius > 0. {
2722 path.curve_to(bottom_right - curve_width, bottom_right);
2723 }
2724
2725 let bottom_left = vec2f(line.start_x, bottom_right.y());
2726 path.line_to(bottom_left + curve_width);
2727 if self.corner_radius > 0. {
2728 path.curve_to(bottom_left - curve_height, bottom_left);
2729 }
2730 }
2731 }
2732
2733 if first_line.start_x > last_line.start_x {
2734 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2735 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2736 path.line_to(second_top_left + curve_height);
2737 if self.corner_radius > 0. {
2738 path.curve_to(second_top_left + curve_width, second_top_left);
2739 }
2740 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2741 path.line_to(first_bottom_left - curve_width);
2742 if self.corner_radius > 0. {
2743 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2744 }
2745 }
2746
2747 path.line_to(first_top_left + curve_height);
2748 if self.corner_radius > 0. {
2749 path.curve_to(first_top_left + top_curve_width, first_top_left);
2750 }
2751 path.line_to(first_top_right - top_curve_width);
2752
2753 scene.push_path(path.build(self.color, Some(bounds)));
2754 }
2755}
2756
2757fn position_to_display_point(
2758 position: Vector2F,
2759 text_bounds: RectF,
2760 position_map: &PositionMap,
2761) -> Option<DisplayPoint> {
2762 if text_bounds.contains_point(position) {
2763 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2764 if point == target_point {
2765 Some(point)
2766 } else {
2767 None
2768 }
2769 } else {
2770 None
2771 }
2772}
2773
2774fn range_to_bounds(
2775 range: &Range<DisplayPoint>,
2776 content_origin: Vector2F,
2777 scroll_left: f32,
2778 scroll_top: f32,
2779 visible_row_range: &Range<u32>,
2780 line_end_overshoot: f32,
2781 position_map: &PositionMap,
2782) -> impl Iterator<Item = RectF> {
2783 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2784
2785 if range.start == range.end {
2786 return bounds.into_iter();
2787 }
2788
2789 let start_row = visible_row_range.start;
2790 let end_row = visible_row_range.end;
2791
2792 let row_range = if range.end.column() == 0 {
2793 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2794 } else {
2795 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2796 };
2797
2798 let first_y =
2799 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2800
2801 for (idx, row) in row_range.enumerate() {
2802 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2803
2804 let start_x = if row == range.start.row() {
2805 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2806 - scroll_left
2807 } else {
2808 content_origin.x() - scroll_left
2809 };
2810
2811 let end_x = if row == range.end.row() {
2812 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2813 } else {
2814 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2815 };
2816
2817 bounds.push(RectF::from_points(
2818 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2819 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2820 ))
2821 }
2822
2823 bounds.into_iter()
2824}
2825
2826pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2827 delta.powf(1.5) / 100.0
2828}
2829
2830fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2831 delta.powf(1.2) / 300.0
2832}
2833
2834#[cfg(test)]
2835mod tests {
2836 use super::*;
2837 use crate::{
2838 display_map::{BlockDisposition, BlockProperties},
2839 Editor, MultiBuffer,
2840 };
2841 use gpui::TestAppContext;
2842 use log::info;
2843 use settings::Settings;
2844 use std::{num::NonZeroU32, sync::Arc};
2845 use util::test::sample_text;
2846
2847 #[gpui::test]
2848 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2849 cx.update(|cx| cx.set_global(Settings::test(cx)));
2850 let (_, editor) = cx.add_window(|cx| {
2851 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2852 Editor::new(EditorMode::Full, buffer, None, None, cx)
2853 });
2854 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2855
2856 let layouts = editor.update(cx, |editor, cx| {
2857 let snapshot = editor.snapshot(cx);
2858 element
2859 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2860 .0
2861 });
2862 assert_eq!(layouts.len(), 6);
2863 }
2864
2865 #[gpui::test]
2866 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2867 cx.update(|cx| cx.set_global(Settings::test(cx)));
2868 let (_, editor) = cx.add_window(|cx| {
2869 let buffer = MultiBuffer::build_simple("", cx);
2870 Editor::new(EditorMode::Full, buffer, None, None, cx)
2871 });
2872
2873 editor.update(cx, |editor, cx| {
2874 editor.set_placeholder_text("hello", cx);
2875 editor.insert_blocks(
2876 [BlockProperties {
2877 style: BlockStyle::Fixed,
2878 disposition: BlockDisposition::Above,
2879 height: 3,
2880 position: Anchor::min(),
2881 render: Arc::new(|_| Empty::new().into_any()),
2882 }],
2883 cx,
2884 );
2885
2886 // Blur the editor so that it displays placeholder text.
2887 cx.blur();
2888 });
2889
2890 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2891 let (size, mut state) = editor.update(cx, |editor, cx| {
2892 let mut new_parents = Default::default();
2893 let mut notify_views_if_parents_change = Default::default();
2894 let mut layout_cx = LayoutContext::new(
2895 cx,
2896 &mut new_parents,
2897 &mut notify_views_if_parents_change,
2898 false,
2899 );
2900 element.layout(
2901 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2902 editor,
2903 &mut layout_cx,
2904 )
2905 });
2906
2907 assert_eq!(state.position_map.line_layouts.len(), 4);
2908 assert_eq!(
2909 state
2910 .line_number_layouts
2911 .iter()
2912 .map(Option::is_some)
2913 .collect::<Vec<_>>(),
2914 &[false, false, false, true]
2915 );
2916
2917 // Don't panic.
2918 let mut scene = SceneBuilder::new(1.0);
2919 let bounds = RectF::new(Default::default(), size);
2920 editor.update(cx, |editor, cx| {
2921 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2922 });
2923 }
2924
2925 #[gpui::test]
2926 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
2927 let tab_size = 4;
2928 let input_text = "\t \t|\t| a b";
2929 let expected_invisibles = vec![
2930 Invisible::Tab {
2931 line_start_offset: 0,
2932 },
2933 Invisible::Whitespace {
2934 line_offset: tab_size as usize,
2935 },
2936 Invisible::Tab {
2937 line_start_offset: tab_size as usize + 1,
2938 },
2939 Invisible::Tab {
2940 line_start_offset: tab_size as usize * 2 + 1,
2941 },
2942 Invisible::Whitespace {
2943 line_offset: tab_size as usize * 3 + 1,
2944 },
2945 Invisible::Whitespace {
2946 line_offset: tab_size as usize * 3 + 3,
2947 },
2948 ];
2949 assert_eq!(
2950 expected_invisibles.len(),
2951 input_text
2952 .chars()
2953 .filter(|initial_char| initial_char.is_whitespace())
2954 .count(),
2955 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
2956 );
2957
2958 cx.update(|cx| {
2959 let mut test_settings = Settings::test(cx);
2960 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
2961 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(tab_size).unwrap());
2962 cx.set_global(test_settings);
2963 });
2964 let actual_invisibles =
2965 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
2966
2967 assert_eq!(expected_invisibles, actual_invisibles);
2968 }
2969
2970 #[gpui::test]
2971 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
2972 cx.update(|cx| {
2973 let mut test_settings = Settings::test(cx);
2974 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
2975 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(4).unwrap());
2976 cx.set_global(test_settings);
2977 });
2978
2979 for editor_mode_without_invisibles in [
2980 EditorMode::SingleLine,
2981 EditorMode::AutoHeight { max_lines: 100 },
2982 ] {
2983 let invisibles = collect_invisibles_from_new_editor(
2984 cx,
2985 editor_mode_without_invisibles,
2986 "\t\t\t| | a b",
2987 500.0,
2988 );
2989 assert!(invisibles.is_empty(),
2990 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
2991 }
2992 }
2993
2994 #[gpui::test]
2995 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
2996 let tab_size = 4;
2997 let input_text = "a\tbcd ".repeat(9);
2998 let repeated_invisibles = [
2999 Invisible::Tab {
3000 line_start_offset: 1,
3001 },
3002 Invisible::Whitespace {
3003 line_offset: tab_size as usize + 3,
3004 },
3005 Invisible::Whitespace {
3006 line_offset: tab_size as usize + 4,
3007 },
3008 Invisible::Whitespace {
3009 line_offset: tab_size as usize + 5,
3010 },
3011 ];
3012 let expected_invisibles = std::iter::once(repeated_invisibles)
3013 .cycle()
3014 .take(9)
3015 .flatten()
3016 .collect::<Vec<_>>();
3017 assert_eq!(
3018 expected_invisibles.len(),
3019 input_text
3020 .chars()
3021 .filter(|initial_char| initial_char.is_whitespace())
3022 .count(),
3023 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3024 );
3025 info!("Expected invisibles: {expected_invisibles:?}");
3026
3027 // Put the same string with repeating whitespace pattern into editors of various size,
3028 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3029 let resize_step = 10.0;
3030 let mut editor_width = 200.0;
3031 while editor_width <= 1000.0 {
3032 cx.update(|cx| {
3033 let mut test_settings = Settings::test(cx);
3034 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(tab_size).unwrap());
3035 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
3036 test_settings.editor_defaults.preferred_line_length = Some(editor_width as u32);
3037 test_settings.editor_defaults.soft_wrap =
3038 Some(settings::SoftWrap::PreferredLineLength);
3039 cx.set_global(test_settings);
3040 });
3041
3042 let actual_invisibles =
3043 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3044
3045 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3046 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3047 let mut i = 0;
3048 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3049 i = actual_index;
3050 match expected_invisibles.get(i) {
3051 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3052 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3053 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3054 _ => {
3055 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3056 }
3057 },
3058 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3059 }
3060 }
3061 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3062 assert!(
3063 missing_expected_invisibles.is_empty(),
3064 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3065 );
3066
3067 editor_width += resize_step;
3068 }
3069 }
3070
3071 fn collect_invisibles_from_new_editor(
3072 cx: &mut TestAppContext,
3073 editor_mode: EditorMode,
3074 input_text: &str,
3075 editor_width: f32,
3076 ) -> Vec<Invisible> {
3077 info!(
3078 "Creating editor with mode {editor_mode:?}, witdh {editor_width} and text '{input_text}'"
3079 );
3080 let (_, editor) = cx.add_window(|cx| {
3081 let buffer = MultiBuffer::build_simple(&input_text, cx);
3082 Editor::new(editor_mode, buffer, None, None, cx)
3083 });
3084
3085 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3086 let (_, layout_state) = editor.update(cx, |editor, cx| {
3087 editor.set_soft_wrap_mode(settings::SoftWrap::EditorWidth, cx);
3088 editor.set_wrap_width(Some(editor_width), cx);
3089
3090 let mut new_parents = Default::default();
3091 let mut notify_views_if_parents_change = Default::default();
3092 let mut layout_cx = LayoutContext::new(
3093 cx,
3094 &mut new_parents,
3095 &mut notify_views_if_parents_change,
3096 false,
3097 );
3098 element.layout(
3099 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3100 editor,
3101 &mut layout_cx,
3102 )
3103 });
3104
3105 layout_state
3106 .position_map
3107 .line_layouts
3108 .iter()
3109 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3110 .flatten()
3111 .cloned()
3112 .collect()
3113 }
3114}