1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, SelectPhase, SoftWrap, ToPoint,
4 MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 editor_settings::ShowScrollbar,
9 git::{diff_hunk_to_display, DisplayDiffHunk},
10 hover_popover::{
11 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
12 MIN_POPOVER_LINE_HEIGHT,
13 },
14 link_go_to_definition::{
15 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
16 },
17 mouse_context_menu, EditorSettings, EditorStyle, GutterHover, UnfoldAt,
18};
19use clock::ReplicaId;
20use collections::{BTreeMap, HashMap};
21use git::diff::DiffHunkStatus;
22use gpui::{
23 color::Color,
24 elements::*,
25 fonts::{HighlightStyle, TextStyle, Underline},
26 geometry::{
27 rect::RectF,
28 vector::{vec2f, Vector2F},
29 PathBuilder,
30 },
31 json::{self, ToJson},
32 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
33 text_layout::{self, Line, RunStyle, TextLayoutCache},
34 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
35 MouseRegion, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
36};
37use itertools::Itertools;
38use json::json;
39use language::{
40 language_settings::ShowWhitespaceSetting, Bias, CursorShape, DiagnosticSeverity, OffsetUtf16,
41 Selection,
42};
43use project::{
44 project_settings::{GitGutterSetting, ProjectSettings},
45 ProjectPath,
46};
47use smallvec::SmallVec;
48use std::{
49 borrow::Cow,
50 cmp::{self, Ordering},
51 fmt::Write,
52 iter,
53 ops::Range,
54 sync::Arc,
55};
56use text::Point;
57use workspace::item::Item;
58
59enum FoldMarkers {}
60
61struct SelectionLayout {
62 head: DisplayPoint,
63 cursor_shape: CursorShape,
64 is_newest: bool,
65 range: Range<DisplayPoint>,
66}
67
68impl SelectionLayout {
69 fn new<T: ToPoint + ToDisplayPoint + Clone>(
70 selection: Selection<T>,
71 line_mode: bool,
72 cursor_shape: CursorShape,
73 map: &DisplaySnapshot,
74 is_newest: bool,
75 ) -> Self {
76 if line_mode {
77 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
78 let point_range = map.expand_to_line(selection.range());
79 Self {
80 head: selection.head().to_display_point(map),
81 cursor_shape,
82 is_newest,
83 range: point_range.start.to_display_point(map)
84 ..point_range.end.to_display_point(map),
85 }
86 } else {
87 let selection = selection.map(|p| p.to_display_point(map));
88 Self {
89 head: selection.head(),
90 cursor_shape,
91 is_newest,
92 range: selection.range(),
93 }
94 }
95 }
96}
97
98pub struct EditorElement {
99 style: Arc<EditorStyle>,
100}
101
102impl EditorElement {
103 pub fn new(style: EditorStyle) -> Self {
104 Self {
105 style: Arc::new(style),
106 }
107 }
108
109 fn attach_mouse_handlers(
110 scene: &mut SceneBuilder,
111 position_map: &Arc<PositionMap>,
112 has_popovers: bool,
113 visible_bounds: RectF,
114 text_bounds: RectF,
115 gutter_bounds: RectF,
116 bounds: RectF,
117 cx: &mut ViewContext<Editor>,
118 ) {
119 enum EditorElementMouseHandlers {}
120 scene.push_mouse_region(
121 MouseRegion::new::<EditorElementMouseHandlers>(
122 cx.view_id(),
123 cx.view_id(),
124 visible_bounds,
125 )
126 .on_down(MouseButton::Left, {
127 let position_map = position_map.clone();
128 move |event, editor, cx| {
129 if !Self::mouse_down(
130 editor,
131 event.platform_event,
132 position_map.as_ref(),
133 text_bounds,
134 gutter_bounds,
135 cx,
136 ) {
137 cx.propagate_event();
138 }
139 }
140 })
141 .on_down(MouseButton::Right, {
142 let position_map = position_map.clone();
143 move |event, editor, cx| {
144 if !Self::mouse_right_down(
145 editor,
146 event.position,
147 position_map.as_ref(),
148 text_bounds,
149 cx,
150 ) {
151 cx.propagate_event();
152 }
153 }
154 })
155 .on_up(MouseButton::Left, {
156 let position_map = position_map.clone();
157 move |event, editor, cx| {
158 if !Self::mouse_up(
159 editor,
160 event.position,
161 event.cmd,
162 event.shift,
163 event.alt,
164 position_map.as_ref(),
165 text_bounds,
166 cx,
167 ) {
168 cx.propagate_event()
169 }
170 }
171 })
172 .on_drag(MouseButton::Left, {
173 let position_map = position_map.clone();
174 move |event, editor, cx| {
175 if !Self::mouse_dragged(
176 editor,
177 event.platform_event,
178 position_map.as_ref(),
179 text_bounds,
180 cx,
181 ) {
182 cx.propagate_event()
183 }
184 }
185 })
186 .on_move({
187 let position_map = position_map.clone();
188 move |event, editor, cx| {
189 if !Self::mouse_moved(
190 editor,
191 event.platform_event,
192 &position_map,
193 text_bounds,
194 cx,
195 ) {
196 cx.propagate_event()
197 }
198 }
199 })
200 .on_move_out(move |_, editor: &mut Editor, cx| {
201 if has_popovers {
202 hide_hover(editor, cx);
203 }
204 })
205 .on_scroll({
206 let position_map = position_map.clone();
207 move |event, editor, cx| {
208 if !Self::scroll(
209 editor,
210 event.position,
211 *event.delta.raw(),
212 event.delta.precise(),
213 &position_map,
214 bounds,
215 cx,
216 ) {
217 cx.propagate_event()
218 }
219 }
220 }),
221 );
222
223 enum GutterHandlers {}
224 scene.push_mouse_region(
225 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
226 .on_hover(|hover, editor: &mut Editor, cx| {
227 editor.gutter_hover(
228 &GutterHover {
229 hovered: hover.started,
230 },
231 cx,
232 );
233 }),
234 )
235 }
236
237 fn mouse_down(
238 editor: &mut Editor,
239 MouseButtonEvent {
240 position,
241 modifiers:
242 Modifiers {
243 shift,
244 ctrl,
245 alt,
246 cmd,
247 ..
248 },
249 mut click_count,
250 ..
251 }: MouseButtonEvent,
252 position_map: &PositionMap,
253 text_bounds: RectF,
254 gutter_bounds: RectF,
255 cx: &mut EventContext<Editor>,
256 ) -> bool {
257 if gutter_bounds.contains_point(position) {
258 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
259 } else if !text_bounds.contains_point(position) {
260 return false;
261 }
262
263 let (position, target_position) = position_map.point_for_position(text_bounds, position);
264
265 if shift && alt {
266 editor.select(
267 SelectPhase::BeginColumnar {
268 position,
269 goal_column: target_position.column(),
270 },
271 cx,
272 );
273 } else if shift && !ctrl && !alt && !cmd {
274 editor.select(
275 SelectPhase::Extend {
276 position,
277 click_count,
278 },
279 cx,
280 );
281 } else {
282 editor.select(
283 SelectPhase::Begin {
284 position,
285 add: alt,
286 click_count,
287 },
288 cx,
289 );
290 }
291
292 true
293 }
294
295 fn mouse_right_down(
296 editor: &mut Editor,
297 position: Vector2F,
298 position_map: &PositionMap,
299 text_bounds: RectF,
300 cx: &mut EventContext<Editor>,
301 ) -> bool {
302 if !text_bounds.contains_point(position) {
303 return false;
304 }
305
306 let (point, _) = position_map.point_for_position(text_bounds, position);
307 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
308 true
309 }
310
311 fn mouse_up(
312 editor: &mut Editor,
313 position: Vector2F,
314 cmd: bool,
315 shift: bool,
316 alt: bool,
317 position_map: &PositionMap,
318 text_bounds: RectF,
319 cx: &mut EventContext<Editor>,
320 ) -> bool {
321 let end_selection = editor.has_pending_selection();
322 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
323
324 if end_selection {
325 editor.select(SelectPhase::End, cx);
326 }
327
328 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
329 let (point, target_point) = position_map.point_for_position(text_bounds, position);
330
331 if point == target_point {
332 if shift {
333 go_to_fetched_type_definition(editor, point, alt, cx);
334 } else {
335 go_to_fetched_definition(editor, point, alt, cx);
336 }
337
338 return true;
339 }
340 }
341
342 end_selection
343 }
344
345 fn mouse_dragged(
346 editor: &mut Editor,
347 MouseMovedEvent {
348 modifiers: Modifiers { cmd, shift, .. },
349 position,
350 ..
351 }: MouseMovedEvent,
352 position_map: &PositionMap,
353 text_bounds: RectF,
354 cx: &mut EventContext<Editor>,
355 ) -> bool {
356 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
357 // Don't trigger hover popover if mouse is hovering over context menu
358 let point = if text_bounds.contains_point(position) {
359 let (point, target_point) = position_map.point_for_position(text_bounds, position);
360 if point == target_point {
361 Some(point)
362 } else {
363 None
364 }
365 } else {
366 None
367 };
368
369 update_go_to_definition_link(editor, point, cmd, shift, cx);
370
371 if editor.has_pending_selection() {
372 let mut scroll_delta = Vector2F::zero();
373
374 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
375 let top = text_bounds.origin_y() + vertical_margin;
376 let bottom = text_bounds.lower_left().y() - vertical_margin;
377 if position.y() < top {
378 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
379 }
380 if position.y() > bottom {
381 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
382 }
383
384 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
385 let left = text_bounds.origin_x() + horizontal_margin;
386 let right = text_bounds.upper_right().x() - horizontal_margin;
387 if position.x() < left {
388 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
389 left - position.x(),
390 ))
391 }
392 if position.x() > right {
393 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
394 position.x() - right,
395 ))
396 }
397
398 let (position, target_position) =
399 position_map.point_for_position(text_bounds, position);
400
401 editor.select(
402 SelectPhase::Update {
403 position,
404 goal_column: target_position.column(),
405 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
406 .clamp(Vector2F::zero(), position_map.scroll_max),
407 },
408 cx,
409 );
410 hover_at(editor, point, cx);
411 true
412 } else {
413 hover_at(editor, point, cx);
414 false
415 }
416 }
417
418 fn mouse_moved(
419 editor: &mut Editor,
420 MouseMovedEvent {
421 modifiers: Modifiers { shift, cmd, .. },
422 position,
423 ..
424 }: MouseMovedEvent,
425 position_map: &PositionMap,
426 text_bounds: RectF,
427 cx: &mut ViewContext<Editor>,
428 ) -> bool {
429 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
430 // Don't trigger hover popover if mouse is hovering over context menu
431 let point = position_to_display_point(position, text_bounds, position_map);
432
433 update_go_to_definition_link(editor, point, cmd, shift, cx);
434 hover_at(editor, point, cx);
435
436 true
437 }
438
439 fn scroll(
440 editor: &mut Editor,
441 position: Vector2F,
442 mut delta: Vector2F,
443 precise: bool,
444 position_map: &PositionMap,
445 bounds: RectF,
446 cx: &mut ViewContext<Editor>,
447 ) -> bool {
448 if !bounds.contains_point(position) {
449 return false;
450 }
451
452 let line_height = position_map.line_height;
453 let max_glyph_width = position_map.em_width;
454
455 let axis = if precise {
456 //Trackpad
457 position_map.snapshot.ongoing_scroll.filter(&mut delta)
458 } else {
459 //Not trackpad
460 delta *= vec2f(max_glyph_width, line_height);
461 None //Resets ongoing scroll
462 };
463
464 let scroll_position = position_map.snapshot.scroll_position();
465 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
466 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
467 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
468 editor.scroll(scroll_position, axis, cx);
469
470 true
471 }
472
473 fn paint_background(
474 &self,
475 scene: &mut SceneBuilder,
476 gutter_bounds: RectF,
477 text_bounds: RectF,
478 layout: &LayoutState,
479 ) {
480 let bounds = gutter_bounds.union_rect(text_bounds);
481 let scroll_top =
482 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
483 scene.push_quad(Quad {
484 bounds: gutter_bounds,
485 background: Some(self.style.gutter_background),
486 border: Border::new(0., Color::transparent_black()),
487 corner_radius: 0.,
488 });
489 scene.push_quad(Quad {
490 bounds: text_bounds,
491 background: Some(self.style.background),
492 border: Border::new(0., Color::transparent_black()),
493 corner_radius: 0.,
494 });
495
496 if let EditorMode::Full = layout.mode {
497 let mut active_rows = layout.active_rows.iter().peekable();
498 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
499 let mut end_row = *start_row;
500 while active_rows.peek().map_or(false, |r| {
501 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
502 }) {
503 active_rows.next().unwrap();
504 end_row += 1;
505 }
506
507 if !contains_non_empty_selection {
508 let origin = vec2f(
509 bounds.origin_x(),
510 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
511 - scroll_top,
512 );
513 let size = vec2f(
514 bounds.width(),
515 layout.position_map.line_height * (end_row - start_row + 1) as f32,
516 );
517 scene.push_quad(Quad {
518 bounds: RectF::new(origin, size),
519 background: Some(self.style.active_line_background),
520 border: Border::default(),
521 corner_radius: 0.,
522 });
523 }
524 }
525
526 if let Some(highlighted_rows) = &layout.highlighted_rows {
527 let origin = vec2f(
528 bounds.origin_x(),
529 bounds.origin_y()
530 + (layout.position_map.line_height * highlighted_rows.start as f32)
531 - scroll_top,
532 );
533 let size = vec2f(
534 bounds.width(),
535 layout.position_map.line_height * highlighted_rows.len() as f32,
536 );
537 scene.push_quad(Quad {
538 bounds: RectF::new(origin, size),
539 background: Some(self.style.highlighted_line_background),
540 border: Border::default(),
541 corner_radius: 0.,
542 });
543 }
544
545 for (wrap_position, active) in layout.wrap_guides.iter() {
546 let x = text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.;
547 let color = if *active {
548 self.style.active_wrap_guide
549 } else {
550 self.style.wrap_guide
551 };
552 scene.push_quad(Quad {
553 bounds: RectF::new(
554 vec2f(x, text_bounds.origin_y()),
555 vec2f(1., text_bounds.height()),
556 ),
557 background: Some(color),
558 border: Border::new(0., Color::transparent_black()),
559 corner_radius: 0.,
560 });
561 }
562 }
563 }
564
565 fn paint_gutter(
566 &mut self,
567 scene: &mut SceneBuilder,
568 bounds: RectF,
569 visible_bounds: RectF,
570 layout: &mut LayoutState,
571 editor: &mut Editor,
572 cx: &mut ViewContext<Editor>,
573 ) {
574 let line_height = layout.position_map.line_height;
575
576 let scroll_position = layout.position_map.snapshot.scroll_position();
577 let scroll_top = scroll_position.y() * line_height;
578
579 let show_gutter = matches!(
580 settings::get::<ProjectSettings>(cx).git.git_gutter,
581 Some(GitGutterSetting::TrackedFiles)
582 );
583
584 if show_gutter {
585 Self::paint_diff_hunks(scene, bounds, layout, cx);
586 }
587
588 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
589 if let Some(line) = line {
590 let line_origin = bounds.origin()
591 + vec2f(
592 bounds.width() - line.width() - layout.gutter_padding,
593 ix as f32 * line_height - (scroll_top % line_height),
594 );
595
596 line.paint(scene, line_origin, visible_bounds, line_height, cx);
597 }
598 }
599
600 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
601 if let Some(indicator) = fold_indicator.as_mut() {
602 let position = vec2f(
603 bounds.width() - layout.gutter_padding,
604 ix as f32 * line_height - (scroll_top % line_height),
605 );
606 let centering_offset = vec2f(
607 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
608 (line_height - indicator.size().y()) / 2.,
609 );
610
611 let indicator_origin = bounds.origin() + position + centering_offset;
612
613 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
614 }
615 }
616
617 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
618 let mut x = 0.;
619 let mut y = *row as f32 * line_height - scroll_top;
620 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
621 y += (line_height - indicator.size().y()) / 2.;
622 indicator.paint(
623 scene,
624 bounds.origin() + vec2f(x, y),
625 visible_bounds,
626 editor,
627 cx,
628 );
629 }
630 }
631
632 fn paint_diff_hunks(
633 scene: &mut SceneBuilder,
634 bounds: RectF,
635 layout: &mut LayoutState,
636 cx: &mut ViewContext<Editor>,
637 ) {
638 let diff_style = &theme::current(cx).editor.diff.clone();
639 let line_height = layout.position_map.line_height;
640
641 let scroll_position = layout.position_map.snapshot.scroll_position();
642 let scroll_top = scroll_position.y() * line_height;
643
644 for hunk in &layout.display_hunks {
645 let (display_row_range, status) = match hunk {
646 //TODO: This rendering is entirely a horrible hack
647 &DisplayDiffHunk::Folded { display_row: row } => {
648 let start_y = row as f32 * line_height - scroll_top;
649 let end_y = start_y + line_height;
650
651 let width = diff_style.removed_width_em * line_height;
652 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
653 let highlight_size = vec2f(width * 2., end_y - start_y);
654 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
655
656 scene.push_quad(Quad {
657 bounds: highlight_bounds,
658 background: Some(diff_style.modified),
659 border: Border::new(0., Color::transparent_black()),
660 corner_radius: 1. * line_height,
661 });
662
663 continue;
664 }
665
666 DisplayDiffHunk::Unfolded {
667 display_row_range,
668 status,
669 } => (display_row_range, status),
670 };
671
672 let color = match status {
673 DiffHunkStatus::Added => diff_style.inserted,
674 DiffHunkStatus::Modified => diff_style.modified,
675
676 //TODO: This rendering is entirely a horrible hack
677 DiffHunkStatus::Removed => {
678 let row = display_row_range.start;
679
680 let offset = line_height / 2.;
681 let start_y = row as f32 * line_height - offset - scroll_top;
682 let end_y = start_y + line_height;
683
684 let width = diff_style.removed_width_em * line_height;
685 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
686 let highlight_size = vec2f(width * 2., end_y - start_y);
687 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
688
689 scene.push_quad(Quad {
690 bounds: highlight_bounds,
691 background: Some(diff_style.deleted),
692 border: Border::new(0., Color::transparent_black()),
693 corner_radius: 1. * line_height,
694 });
695
696 continue;
697 }
698 };
699
700 let start_row = display_row_range.start;
701 let end_row = display_row_range.end;
702
703 let start_y = start_row as f32 * line_height - scroll_top;
704 let end_y = end_row as f32 * line_height - scroll_top;
705
706 let width = diff_style.width_em * line_height;
707 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
708 let highlight_size = vec2f(width * 2., end_y - start_y);
709 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
710
711 scene.push_quad(Quad {
712 bounds: highlight_bounds,
713 background: Some(color),
714 border: Border::new(0., Color::transparent_black()),
715 corner_radius: diff_style.corner_radius * line_height,
716 });
717 }
718 }
719
720 fn paint_text(
721 &mut self,
722 scene: &mut SceneBuilder,
723 bounds: RectF,
724 visible_bounds: RectF,
725 layout: &mut LayoutState,
726 editor: &mut Editor,
727 cx: &mut ViewContext<Editor>,
728 ) {
729 let style = &self.style;
730 let local_replica_id = editor.replica_id(cx);
731 let scroll_position = layout.position_map.snapshot.scroll_position();
732 let start_row = layout.visible_display_row_range.start;
733 let scroll_top = scroll_position.y() * layout.position_map.line_height;
734 let max_glyph_width = layout.position_map.em_width;
735 let scroll_left = scroll_position.x() * max_glyph_width;
736 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
737 let line_end_overshoot = 0.15 * layout.position_map.line_height;
738 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
739
740 scene.push_layer(Some(bounds));
741
742 scene.push_cursor_region(CursorRegion {
743 bounds,
744 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
745 CursorStyle::PointingHand
746 } else {
747 CursorStyle::IBeam
748 },
749 });
750
751 let fold_corner_radius =
752 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
753 for (id, range, color) in layout.fold_ranges.iter() {
754 self.paint_highlighted_range(
755 scene,
756 range.clone(),
757 *color,
758 fold_corner_radius,
759 fold_corner_radius * 2.,
760 layout,
761 content_origin,
762 scroll_top,
763 scroll_left,
764 bounds,
765 );
766
767 for bound in range_to_bounds(
768 &range,
769 content_origin,
770 scroll_left,
771 scroll_top,
772 &layout.visible_display_row_range,
773 line_end_overshoot,
774 &layout.position_map,
775 ) {
776 scene.push_cursor_region(CursorRegion {
777 bounds: bound,
778 style: CursorStyle::PointingHand,
779 });
780
781 let display_row = range.start.row();
782
783 let buffer_row = DisplayPoint::new(display_row, 0)
784 .to_point(&layout.position_map.snapshot.display_snapshot)
785 .row;
786
787 scene.push_mouse_region(
788 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
789 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
790 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
791 })
792 .with_notify_on_hover(true)
793 .with_notify_on_click(true),
794 )
795 }
796 }
797
798 for (range, color) in &layout.highlighted_ranges {
799 self.paint_highlighted_range(
800 scene,
801 range.clone(),
802 *color,
803 0.,
804 line_end_overshoot,
805 layout,
806 content_origin,
807 scroll_top,
808 scroll_left,
809 bounds,
810 );
811 }
812
813 let mut cursors = SmallVec::<[Cursor; 32]>::new();
814 let corner_radius = 0.15 * layout.position_map.line_height;
815 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
816
817 for (replica_id, selections) in &layout.selections {
818 let replica_id = *replica_id;
819 let selection_style = style.replica_selection_style(replica_id);
820
821 for selection in selections {
822 if !selection.range.is_empty()
823 && (replica_id == local_replica_id
824 || Some(replica_id) == editor.leader_replica_id)
825 {
826 invisible_display_ranges.push(selection.range.clone());
827 }
828 self.paint_highlighted_range(
829 scene,
830 selection.range.clone(),
831 selection_style.selection,
832 corner_radius,
833 corner_radius * 2.,
834 layout,
835 content_origin,
836 scroll_top,
837 scroll_left,
838 bounds,
839 );
840
841 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
842 let cursor_position = selection.head;
843 if layout
844 .visible_display_row_range
845 .contains(&cursor_position.row())
846 {
847 let cursor_row_layout = &layout.position_map.line_layouts
848 [(cursor_position.row() - start_row) as usize]
849 .line;
850 let cursor_column = cursor_position.column() as usize;
851
852 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
853 let mut block_width =
854 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
855 if block_width == 0.0 {
856 block_width = layout.position_map.em_width;
857 }
858 let block_text = if let CursorShape::Block = selection.cursor_shape {
859 layout
860 .position_map
861 .snapshot
862 .chars_at(cursor_position)
863 .next()
864 .and_then(|(character, _)| {
865 let font_id =
866 cursor_row_layout.font_for_index(cursor_column)?;
867 let text = character.to_string();
868
869 Some(cx.text_layout_cache().layout_str(
870 &text,
871 cursor_row_layout.font_size(),
872 &[(
873 text.len(),
874 RunStyle {
875 font_id,
876 color: style.background,
877 underline: Default::default(),
878 },
879 )],
880 ))
881 })
882 } else {
883 None
884 };
885
886 let x = cursor_character_x - scroll_left;
887 let y = cursor_position.row() as f32 * layout.position_map.line_height
888 - scroll_top;
889 if selection.is_newest {
890 editor.pixel_position_of_newest_cursor = Some(vec2f(
891 bounds.origin_x() + x + block_width / 2.,
892 bounds.origin_y() + y + layout.position_map.line_height / 2.,
893 ));
894 }
895 cursors.push(Cursor {
896 color: selection_style.cursor,
897 block_width,
898 origin: vec2f(x, y),
899 line_height: layout.position_map.line_height,
900 shape: selection.cursor_shape,
901 block_text,
902 });
903 }
904 }
905 }
906 }
907
908 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
909 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
910 let row = start_row + ix as u32;
911 line_with_invisibles.draw(
912 layout,
913 row,
914 scroll_top,
915 scene,
916 content_origin,
917 scroll_left,
918 visible_text_bounds,
919 whitespace_setting,
920 &invisible_display_ranges,
921 visible_bounds,
922 cx,
923 )
924 }
925 }
926
927 scene.paint_layer(Some(bounds), |scene| {
928 for cursor in cursors {
929 cursor.paint(scene, content_origin, cx);
930 }
931 });
932
933 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
934 scene.push_stacking_context(None, None);
935 let cursor_row_layout =
936 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
937 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
938 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
939 let mut list_origin = content_origin + vec2f(x, y);
940 let list_width = context_menu.size().x();
941 let list_height = context_menu.size().y();
942
943 // Snap the right edge of the list to the right edge of the window if
944 // its horizontal bounds overflow.
945 if list_origin.x() + list_width > cx.window_size().x() {
946 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
947 }
948
949 if list_origin.y() + list_height > bounds.max_y() {
950 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
951 }
952
953 context_menu.paint(
954 scene,
955 list_origin,
956 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
957 editor,
958 cx,
959 );
960
961 scene.pop_stacking_context();
962 }
963
964 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
965 scene.push_stacking_context(None, None);
966
967 // This is safe because we check on layout whether the required row is available
968 let hovered_row_layout =
969 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
970
971 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
972 // height. This is the size we will use to decide whether to render popovers above or below
973 // the hovered line.
974 let first_size = hover_popovers[0].size();
975 let height_to_reserve = first_size.y()
976 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
977
978 // Compute Hovered Point
979 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
980 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
981 let hovered_point = content_origin + vec2f(x, y);
982
983 if hovered_point.y() - height_to_reserve > 0.0 {
984 // There is enough space above. Render popovers above the hovered point
985 let mut current_y = hovered_point.y();
986 for hover_popover in hover_popovers {
987 let size = hover_popover.size();
988 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
989
990 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
991 if x_out_of_bounds < 0.0 {
992 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
993 }
994
995 hover_popover.paint(
996 scene,
997 popover_origin,
998 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
999 editor,
1000 cx,
1001 );
1002
1003 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1004 }
1005 } else {
1006 // There is not enough space above. Render popovers below the hovered point
1007 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1008 for hover_popover in hover_popovers {
1009 let size = hover_popover.size();
1010 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1011
1012 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1013 if x_out_of_bounds < 0.0 {
1014 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1015 }
1016
1017 hover_popover.paint(
1018 scene,
1019 popover_origin,
1020 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1021 editor,
1022 cx,
1023 );
1024
1025 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1026 }
1027 }
1028
1029 scene.pop_stacking_context();
1030 }
1031
1032 scene.pop_layer();
1033 }
1034
1035 fn paint_scrollbar(
1036 &mut self,
1037 scene: &mut SceneBuilder,
1038 bounds: RectF,
1039 layout: &mut LayoutState,
1040 cx: &mut ViewContext<Editor>,
1041 editor: &Editor,
1042 ) {
1043 enum ScrollbarMouseHandlers {}
1044 if layout.mode != EditorMode::Full {
1045 return;
1046 }
1047
1048 let style = &self.style.theme.scrollbar;
1049
1050 let top = bounds.min_y();
1051 let bottom = bounds.max_y();
1052 let right = bounds.max_x();
1053 let left = right - style.width;
1054 let row_range = &layout.scrollbar_row_range;
1055 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1056
1057 let mut height = bounds.height();
1058 let mut first_row_y_offset = 0.0;
1059
1060 // Impose a minimum height on the scrollbar thumb
1061 let row_height = height / max_row;
1062 let min_thumb_height =
1063 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1064 let thumb_height = (row_range.end - row_range.start) * row_height;
1065 if thumb_height < min_thumb_height {
1066 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1067 height -= min_thumb_height - thumb_height;
1068 }
1069
1070 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1071
1072 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1073 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1074 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1075 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1076
1077 if layout.show_scrollbars {
1078 scene.push_quad(Quad {
1079 bounds: track_bounds,
1080 border: style.track.border,
1081 background: style.track.background_color,
1082 ..Default::default()
1083 });
1084 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1085 let theme = theme::current(cx);
1086 let scrollbar_theme = &theme.editor.scrollbar;
1087 if layout.is_singleton && scrollbar_settings.selections {
1088 let start_anchor = Anchor::min();
1089 let end_anchor = Anchor::max();
1090 let mut start_row = None;
1091 let mut end_row = None;
1092 let color = scrollbar_theme.selections;
1093 let border = Border {
1094 width: 1.,
1095 color: style.thumb.border.color,
1096 overlay: false,
1097 top: false,
1098 right: true,
1099 bottom: false,
1100 left: true,
1101 };
1102 let mut push_region = |start, end| {
1103 if let (Some(start_display), Some(end_display)) = (start, end) {
1104 let start_y = y_for_row(start_display as f32);
1105 let mut end_y = y_for_row(end_display as f32);
1106 if end_y - start_y < 1. {
1107 end_y = start_y + 1.;
1108 }
1109 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1110
1111 scene.push_quad(Quad {
1112 bounds,
1113 background: Some(color),
1114 border,
1115 corner_radius: style.thumb.corner_radius,
1116 })
1117 }
1118 };
1119 for (row, _) in &editor
1120 .background_highlights_in_range_for::<crate::items::BufferSearchHighlights>(
1121 start_anchor..end_anchor,
1122 &layout.position_map.snapshot,
1123 &theme,
1124 )
1125 {
1126 let start_display = row.start;
1127 let end_display = row.end;
1128
1129 if start_row.is_none() {
1130 assert_eq!(end_row, None);
1131 start_row = Some(start_display.row());
1132 end_row = Some(end_display.row());
1133 continue;
1134 }
1135 if let Some(current_end) = end_row.as_mut() {
1136 if start_display.row() > *current_end + 1 {
1137 push_region(start_row, end_row);
1138 start_row = Some(start_display.row());
1139 end_row = Some(end_display.row());
1140 } else {
1141 // Merge two hunks.
1142 *current_end = end_display.row();
1143 }
1144 } else {
1145 unreachable!();
1146 }
1147 }
1148 // We might still have a hunk that was not rendered (if there was a search hit on the last line)
1149 push_region(start_row, end_row);
1150 }
1151
1152 if layout.is_singleton && scrollbar_settings.git_diff {
1153 let diff_style = scrollbar_theme.git.clone();
1154 for hunk in layout
1155 .position_map
1156 .snapshot
1157 .buffer_snapshot
1158 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1159 {
1160 let start_display = Point::new(hunk.buffer_range.start, 0)
1161 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1162 let end_display = Point::new(hunk.buffer_range.end, 0)
1163 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1164 let start_y = y_for_row(start_display.row() as f32);
1165 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1166 y_for_row((end_display.row() + 1) as f32)
1167 } else {
1168 y_for_row((end_display.row()) as f32)
1169 };
1170
1171 if end_y - start_y < 1. {
1172 end_y = start_y + 1.;
1173 }
1174 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1175
1176 let color = match hunk.status() {
1177 DiffHunkStatus::Added => diff_style.inserted,
1178 DiffHunkStatus::Modified => diff_style.modified,
1179 DiffHunkStatus::Removed => diff_style.deleted,
1180 };
1181
1182 let border = Border {
1183 width: 1.,
1184 color: style.thumb.border.color,
1185 overlay: false,
1186 top: false,
1187 right: true,
1188 bottom: false,
1189 left: true,
1190 };
1191
1192 scene.push_quad(Quad {
1193 bounds,
1194 background: Some(color),
1195 border,
1196 corner_radius: style.thumb.corner_radius,
1197 })
1198 }
1199 }
1200
1201 scene.push_quad(Quad {
1202 bounds: thumb_bounds,
1203 border: style.thumb.border,
1204 background: style.thumb.background_color,
1205 corner_radius: style.thumb.corner_radius,
1206 });
1207 }
1208
1209 scene.push_cursor_region(CursorRegion {
1210 bounds: track_bounds,
1211 style: CursorStyle::Arrow,
1212 });
1213 scene.push_mouse_region(
1214 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1215 .on_move(move |event, editor: &mut Editor, cx| {
1216 if event.pressed_button.is_none() {
1217 editor.scroll_manager.show_scrollbar(cx);
1218 }
1219 })
1220 .on_down(MouseButton::Left, {
1221 let row_range = row_range.clone();
1222 move |event, editor: &mut Editor, cx| {
1223 let y = event.position.y();
1224 if y < thumb_top || thumb_bottom < y {
1225 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1226 let top_row = center_row
1227 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1228 let mut position = editor.scroll_position(cx);
1229 position.set_y(top_row as f32);
1230 editor.set_scroll_position(position, cx);
1231 } else {
1232 editor.scroll_manager.show_scrollbar(cx);
1233 }
1234 }
1235 })
1236 .on_drag(MouseButton::Left, {
1237 move |event, editor: &mut Editor, cx| {
1238 let y = event.prev_mouse_position.y();
1239 let new_y = event.position.y();
1240 if thumb_top < y && y < thumb_bottom {
1241 let mut position = editor.scroll_position(cx);
1242 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1243 if position.y() < 0.0 {
1244 position.set_y(0.);
1245 }
1246 editor.set_scroll_position(position, cx);
1247 }
1248 }
1249 }),
1250 );
1251 }
1252
1253 #[allow(clippy::too_many_arguments)]
1254 fn paint_highlighted_range(
1255 &self,
1256 scene: &mut SceneBuilder,
1257 range: Range<DisplayPoint>,
1258 color: Color,
1259 corner_radius: f32,
1260 line_end_overshoot: f32,
1261 layout: &LayoutState,
1262 content_origin: Vector2F,
1263 scroll_top: f32,
1264 scroll_left: f32,
1265 bounds: RectF,
1266 ) {
1267 let start_row = layout.visible_display_row_range.start;
1268 let end_row = layout.visible_display_row_range.end;
1269 if range.start != range.end {
1270 let row_range = if range.end.column() == 0 {
1271 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1272 } else {
1273 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1274 };
1275
1276 let highlighted_range = HighlightedRange {
1277 color,
1278 line_height: layout.position_map.line_height,
1279 corner_radius,
1280 start_y: content_origin.y()
1281 + row_range.start as f32 * layout.position_map.line_height
1282 - scroll_top,
1283 lines: row_range
1284 .into_iter()
1285 .map(|row| {
1286 let line_layout =
1287 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1288 HighlightedRangeLine {
1289 start_x: if row == range.start.row() {
1290 content_origin.x()
1291 + line_layout.x_for_index(range.start.column() as usize)
1292 - scroll_left
1293 } else {
1294 content_origin.x() - scroll_left
1295 },
1296 end_x: if row == range.end.row() {
1297 content_origin.x()
1298 + line_layout.x_for_index(range.end.column() as usize)
1299 - scroll_left
1300 } else {
1301 content_origin.x() + line_layout.width() + line_end_overshoot
1302 - scroll_left
1303 },
1304 }
1305 })
1306 .collect(),
1307 };
1308
1309 highlighted_range.paint(bounds, scene);
1310 }
1311 }
1312
1313 fn paint_blocks(
1314 &mut self,
1315 scene: &mut SceneBuilder,
1316 bounds: RectF,
1317 visible_bounds: RectF,
1318 layout: &mut LayoutState,
1319 editor: &mut Editor,
1320 cx: &mut ViewContext<Editor>,
1321 ) {
1322 let scroll_position = layout.position_map.snapshot.scroll_position();
1323 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1324 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1325
1326 for block in &mut layout.blocks {
1327 let mut origin = bounds.origin()
1328 + vec2f(
1329 0.,
1330 block.row as f32 * layout.position_map.line_height - scroll_top,
1331 );
1332 if !matches!(block.style, BlockStyle::Sticky) {
1333 origin += vec2f(-scroll_left, 0.);
1334 }
1335 block
1336 .element
1337 .paint(scene, origin, visible_bounds, editor, cx);
1338 }
1339 }
1340
1341 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1342 let style = &self.style;
1343
1344 cx.text_layout_cache()
1345 .layout_str(
1346 " ".repeat(column).as_str(),
1347 style.text.font_size,
1348 &[(
1349 column,
1350 RunStyle {
1351 font_id: style.text.font_id,
1352 color: Color::black(),
1353 underline: Default::default(),
1354 },
1355 )],
1356 )
1357 .width()
1358 }
1359
1360 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1361 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1362 self.column_pixels(digit_count, cx)
1363 }
1364
1365 //Folds contained in a hunk are ignored apart from shrinking visual size
1366 //If a fold contains any hunks then that fold line is marked as modified
1367 fn layout_git_gutters(
1368 &self,
1369 display_rows: Range<u32>,
1370 snapshot: &EditorSnapshot,
1371 ) -> Vec<DisplayDiffHunk> {
1372 let buffer_snapshot = &snapshot.buffer_snapshot;
1373
1374 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1375 .to_point(snapshot)
1376 .row;
1377 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1378 .to_point(snapshot)
1379 .row;
1380
1381 buffer_snapshot
1382 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1383 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1384 .dedup()
1385 .collect()
1386 }
1387
1388 fn layout_line_numbers(
1389 &self,
1390 rows: Range<u32>,
1391 active_rows: &BTreeMap<u32, bool>,
1392 is_singleton: bool,
1393 snapshot: &EditorSnapshot,
1394 cx: &ViewContext<Editor>,
1395 ) -> (
1396 Vec<Option<text_layout::Line>>,
1397 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1398 ) {
1399 let style = &self.style;
1400 let include_line_numbers = snapshot.mode == EditorMode::Full;
1401 let mut line_number_layouts = Vec::with_capacity(rows.len());
1402 let mut fold_statuses = Vec::with_capacity(rows.len());
1403 let mut line_number = String::new();
1404 for (ix, row) in snapshot
1405 .buffer_rows(rows.start)
1406 .take((rows.end - rows.start) as usize)
1407 .enumerate()
1408 {
1409 let display_row = rows.start + ix as u32;
1410 let (active, color) = if active_rows.contains_key(&display_row) {
1411 (true, style.line_number_active)
1412 } else {
1413 (false, style.line_number)
1414 };
1415 if let Some(buffer_row) = row {
1416 if include_line_numbers {
1417 line_number.clear();
1418 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1419 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1420 &line_number,
1421 style.text.font_size,
1422 &[(
1423 line_number.len(),
1424 RunStyle {
1425 font_id: style.text.font_id,
1426 color,
1427 underline: Default::default(),
1428 },
1429 )],
1430 )));
1431 fold_statuses.push(
1432 is_singleton
1433 .then(|| {
1434 snapshot
1435 .fold_for_line(buffer_row)
1436 .map(|fold_status| (fold_status, buffer_row, active))
1437 })
1438 .flatten(),
1439 )
1440 }
1441 } else {
1442 fold_statuses.push(None);
1443 line_number_layouts.push(None);
1444 }
1445 }
1446
1447 (line_number_layouts, fold_statuses)
1448 }
1449
1450 fn layout_lines(
1451 &mut self,
1452 rows: Range<u32>,
1453 line_number_layouts: &[Option<Line>],
1454 snapshot: &EditorSnapshot,
1455 cx: &ViewContext<Editor>,
1456 ) -> Vec<LineWithInvisibles> {
1457 if rows.start >= rows.end {
1458 return Vec::new();
1459 }
1460
1461 // When the editor is empty and unfocused, then show the placeholder.
1462 if snapshot.is_empty() {
1463 let placeholder_style = self
1464 .style
1465 .placeholder_text
1466 .as_ref()
1467 .unwrap_or(&self.style.text);
1468 let placeholder_text = snapshot.placeholder_text();
1469 let placeholder_lines = placeholder_text
1470 .as_ref()
1471 .map_or("", AsRef::as_ref)
1472 .split('\n')
1473 .skip(rows.start as usize)
1474 .chain(iter::repeat(""))
1475 .take(rows.len());
1476 placeholder_lines
1477 .map(|line| {
1478 cx.text_layout_cache().layout_str(
1479 line,
1480 placeholder_style.font_size,
1481 &[(
1482 line.len(),
1483 RunStyle {
1484 font_id: placeholder_style.font_id,
1485 color: placeholder_style.color,
1486 underline: Default::default(),
1487 },
1488 )],
1489 )
1490 })
1491 .map(|line| LineWithInvisibles {
1492 line,
1493 invisibles: Vec::new(),
1494 })
1495 .collect()
1496 } else {
1497 let style = &self.style;
1498 let chunks = snapshot
1499 .chunks(
1500 rows.clone(),
1501 true,
1502 Some(style.theme.hint),
1503 Some(style.theme.suggestion),
1504 )
1505 .map(|chunk| {
1506 let mut highlight_style = chunk
1507 .syntax_highlight_id
1508 .and_then(|id| id.style(&style.syntax));
1509
1510 if let Some(chunk_highlight) = chunk.highlight_style {
1511 if let Some(highlight_style) = highlight_style.as_mut() {
1512 highlight_style.highlight(chunk_highlight);
1513 } else {
1514 highlight_style = Some(chunk_highlight);
1515 }
1516 }
1517
1518 let mut diagnostic_highlight = HighlightStyle::default();
1519
1520 if chunk.is_unnecessary {
1521 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1522 }
1523
1524 if let Some(severity) = chunk.diagnostic_severity {
1525 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1526 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1527 let diagnostic_style = super::diagnostic_style(severity, true, style);
1528 diagnostic_highlight.underline = Some(Underline {
1529 color: Some(diagnostic_style.message.text.color),
1530 thickness: 1.0.into(),
1531 squiggly: true,
1532 });
1533 }
1534 }
1535
1536 if let Some(highlight_style) = highlight_style.as_mut() {
1537 highlight_style.highlight(diagnostic_highlight);
1538 } else {
1539 highlight_style = Some(diagnostic_highlight);
1540 }
1541
1542 HighlightedChunk {
1543 chunk: chunk.text,
1544 style: highlight_style,
1545 is_tab: chunk.is_tab,
1546 }
1547 });
1548
1549 LineWithInvisibles::from_chunks(
1550 chunks,
1551 &style.text,
1552 cx.text_layout_cache(),
1553 cx.font_cache(),
1554 MAX_LINE_LEN,
1555 rows.len() as usize,
1556 line_number_layouts,
1557 snapshot.mode,
1558 )
1559 }
1560 }
1561
1562 #[allow(clippy::too_many_arguments)]
1563 fn layout_blocks(
1564 &mut self,
1565 rows: Range<u32>,
1566 snapshot: &EditorSnapshot,
1567 editor_width: f32,
1568 scroll_width: f32,
1569 gutter_padding: f32,
1570 gutter_width: f32,
1571 em_width: f32,
1572 text_x: f32,
1573 line_height: f32,
1574 style: &EditorStyle,
1575 line_layouts: &[LineWithInvisibles],
1576 editor: &mut Editor,
1577 cx: &mut LayoutContext<Editor>,
1578 ) -> (f32, Vec<BlockLayout>) {
1579 let mut block_id = 0;
1580 let scroll_x = snapshot.scroll_anchor.offset.x();
1581 let (fixed_blocks, non_fixed_blocks) = snapshot
1582 .blocks_in_range(rows.clone())
1583 .partition::<Vec<_>, _>(|(_, block)| match block {
1584 TransformBlock::ExcerptHeader { .. } => false,
1585 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1586 });
1587 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1588 let mut element = match block {
1589 TransformBlock::Custom(block) => {
1590 let align_to = block
1591 .position()
1592 .to_point(&snapshot.buffer_snapshot)
1593 .to_display_point(snapshot);
1594 let anchor_x = text_x
1595 + if rows.contains(&align_to.row()) {
1596 line_layouts[(align_to.row() - rows.start) as usize]
1597 .line
1598 .x_for_index(align_to.column() as usize)
1599 } else {
1600 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1601 .x_for_index(align_to.column() as usize)
1602 };
1603
1604 block.render(&mut BlockContext {
1605 view_context: cx,
1606 anchor_x,
1607 gutter_padding,
1608 line_height,
1609 scroll_x,
1610 gutter_width,
1611 em_width,
1612 block_id,
1613 })
1614 }
1615 TransformBlock::ExcerptHeader {
1616 id,
1617 buffer,
1618 range,
1619 starts_new_buffer,
1620 ..
1621 } => {
1622 let tooltip_style = theme::current(cx).tooltip.clone();
1623 let include_root = editor
1624 .project
1625 .as_ref()
1626 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1627 .unwrap_or_default();
1628 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1629 let jump_path = ProjectPath {
1630 worktree_id: file.worktree_id(cx),
1631 path: file.path.clone(),
1632 };
1633 let jump_anchor = range
1634 .primary
1635 .as_ref()
1636 .map_or(range.context.start, |primary| primary.start);
1637 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1638
1639 enum JumpIcon {}
1640 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1641 let style = style.jump_icon.style_for(state);
1642 Svg::new("icons/arrow_up_right_8.svg")
1643 .with_color(style.color)
1644 .constrained()
1645 .with_width(style.icon_width)
1646 .aligned()
1647 .contained()
1648 .with_style(style.container)
1649 .constrained()
1650 .with_width(style.button_width)
1651 .with_height(style.button_width)
1652 })
1653 .with_cursor_style(CursorStyle::PointingHand)
1654 .on_click(MouseButton::Left, move |_, editor, cx| {
1655 if let Some(workspace) = editor
1656 .workspace
1657 .as_ref()
1658 .and_then(|(workspace, _)| workspace.upgrade(cx))
1659 {
1660 workspace.update(cx, |workspace, cx| {
1661 Editor::jump(
1662 workspace,
1663 jump_path.clone(),
1664 jump_position,
1665 jump_anchor,
1666 cx,
1667 );
1668 });
1669 }
1670 })
1671 .with_tooltip::<JumpIcon>(
1672 (*id).into(),
1673 "Jump to Buffer".to_string(),
1674 Some(Box::new(crate::OpenExcerpts)),
1675 tooltip_style.clone(),
1676 cx,
1677 )
1678 .aligned()
1679 .flex_float()
1680 });
1681
1682 if *starts_new_buffer {
1683 let editor_font_size = style.text.font_size;
1684 let style = &style.diagnostic_path_header;
1685 let font_size = (style.text_scale_factor * editor_font_size).round();
1686
1687 let path = buffer.resolve_file_path(cx, include_root);
1688 let mut filename = None;
1689 let mut parent_path = None;
1690 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1691 if let Some(path) = path {
1692 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1693 parent_path =
1694 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1695 }
1696
1697 Flex::row()
1698 .with_child(
1699 Label::new(
1700 filename.unwrap_or_else(|| "untitled".to_string()),
1701 style.filename.text.clone().with_font_size(font_size),
1702 )
1703 .contained()
1704 .with_style(style.filename.container)
1705 .aligned(),
1706 )
1707 .with_children(parent_path.map(|path| {
1708 Label::new(path, style.path.text.clone().with_font_size(font_size))
1709 .contained()
1710 .with_style(style.path.container)
1711 .aligned()
1712 }))
1713 .with_children(jump_icon)
1714 .contained()
1715 .with_style(style.container)
1716 .with_padding_left(gutter_padding)
1717 .with_padding_right(gutter_padding)
1718 .expanded()
1719 .into_any_named("path header block")
1720 } else {
1721 let text_style = style.text.clone();
1722 Flex::row()
1723 .with_child(Label::new("⋯", text_style))
1724 .with_children(jump_icon)
1725 .contained()
1726 .with_padding_left(gutter_padding)
1727 .with_padding_right(gutter_padding)
1728 .expanded()
1729 .into_any_named("collapsed context")
1730 }
1731 }
1732 };
1733
1734 element.layout(
1735 SizeConstraint {
1736 min: Vector2F::zero(),
1737 max: vec2f(width, block.height() as f32 * line_height),
1738 },
1739 editor,
1740 cx,
1741 );
1742 element
1743 };
1744
1745 let mut fixed_block_max_width = 0f32;
1746 let mut blocks = Vec::new();
1747 for (row, block) in fixed_blocks {
1748 let element = render_block(block, f32::INFINITY, block_id);
1749 block_id += 1;
1750 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1751 blocks.push(BlockLayout {
1752 row,
1753 element,
1754 style: BlockStyle::Fixed,
1755 });
1756 }
1757 for (row, block) in non_fixed_blocks {
1758 let style = match block {
1759 TransformBlock::Custom(block) => block.style(),
1760 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1761 };
1762 let width = match style {
1763 BlockStyle::Sticky => editor_width,
1764 BlockStyle::Flex => editor_width
1765 .max(fixed_block_max_width)
1766 .max(gutter_width + scroll_width),
1767 BlockStyle::Fixed => unreachable!(),
1768 };
1769 let element = render_block(block, width, block_id);
1770 block_id += 1;
1771 blocks.push(BlockLayout {
1772 row,
1773 element,
1774 style,
1775 });
1776 }
1777 (
1778 scroll_width.max(fixed_block_max_width - gutter_width),
1779 blocks,
1780 )
1781 }
1782}
1783
1784struct HighlightedChunk<'a> {
1785 chunk: &'a str,
1786 style: Option<HighlightStyle>,
1787 is_tab: bool,
1788}
1789
1790#[derive(Debug)]
1791pub struct LineWithInvisibles {
1792 pub line: Line,
1793 invisibles: Vec<Invisible>,
1794}
1795
1796impl LineWithInvisibles {
1797 fn from_chunks<'a>(
1798 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1799 text_style: &TextStyle,
1800 text_layout_cache: &TextLayoutCache,
1801 font_cache: &Arc<FontCache>,
1802 max_line_len: usize,
1803 max_line_count: usize,
1804 line_number_layouts: &[Option<Line>],
1805 editor_mode: EditorMode,
1806 ) -> Vec<Self> {
1807 let mut layouts = Vec::with_capacity(max_line_count);
1808 let mut line = String::new();
1809 let mut invisibles = Vec::new();
1810 let mut styles = Vec::new();
1811 let mut non_whitespace_added = false;
1812 let mut row = 0;
1813 let mut line_exceeded_max_len = false;
1814 for highlighted_chunk in chunks.chain([HighlightedChunk {
1815 chunk: "\n",
1816 style: None,
1817 is_tab: false,
1818 }]) {
1819 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1820 if ix > 0 {
1821 layouts.push(Self {
1822 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1823 invisibles: invisibles.drain(..).collect(),
1824 });
1825
1826 line.clear();
1827 styles.clear();
1828 row += 1;
1829 line_exceeded_max_len = false;
1830 non_whitespace_added = false;
1831 if row == max_line_count {
1832 return layouts;
1833 }
1834 }
1835
1836 if !line_chunk.is_empty() && !line_exceeded_max_len {
1837 let text_style = if let Some(style) = highlighted_chunk.style {
1838 text_style
1839 .clone()
1840 .highlight(style, font_cache)
1841 .map(Cow::Owned)
1842 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1843 } else {
1844 Cow::Borrowed(text_style)
1845 };
1846
1847 if line.len() + line_chunk.len() > max_line_len {
1848 let mut chunk_len = max_line_len - line.len();
1849 while !line_chunk.is_char_boundary(chunk_len) {
1850 chunk_len -= 1;
1851 }
1852 line_chunk = &line_chunk[..chunk_len];
1853 line_exceeded_max_len = true;
1854 }
1855
1856 styles.push((
1857 line_chunk.len(),
1858 RunStyle {
1859 font_id: text_style.font_id,
1860 color: text_style.color,
1861 underline: text_style.underline,
1862 },
1863 ));
1864
1865 if editor_mode == EditorMode::Full {
1866 // Line wrap pads its contents with fake whitespaces,
1867 // avoid printing them
1868 let inside_wrapped_string = line_number_layouts
1869 .get(row)
1870 .and_then(|layout| layout.as_ref())
1871 .is_none();
1872 if highlighted_chunk.is_tab {
1873 if non_whitespace_added || !inside_wrapped_string {
1874 invisibles.push(Invisible::Tab {
1875 line_start_offset: line.len(),
1876 });
1877 }
1878 } else {
1879 invisibles.extend(
1880 line_chunk
1881 .chars()
1882 .enumerate()
1883 .filter(|(_, line_char)| {
1884 let is_whitespace = line_char.is_whitespace();
1885 non_whitespace_added |= !is_whitespace;
1886 is_whitespace
1887 && (non_whitespace_added || !inside_wrapped_string)
1888 })
1889 .map(|(whitespace_index, _)| Invisible::Whitespace {
1890 line_offset: line.len() + whitespace_index,
1891 }),
1892 )
1893 }
1894 }
1895
1896 line.push_str(line_chunk);
1897 }
1898 }
1899 }
1900
1901 layouts
1902 }
1903
1904 fn draw(
1905 &self,
1906 layout: &LayoutState,
1907 row: u32,
1908 scroll_top: f32,
1909 scene: &mut SceneBuilder,
1910 content_origin: Vector2F,
1911 scroll_left: f32,
1912 visible_text_bounds: RectF,
1913 whitespace_setting: ShowWhitespaceSetting,
1914 selection_ranges: &[Range<DisplayPoint>],
1915 visible_bounds: RectF,
1916 cx: &mut ViewContext<Editor>,
1917 ) {
1918 let line_height = layout.position_map.line_height;
1919 let line_y = row as f32 * line_height - scroll_top;
1920
1921 self.line.paint(
1922 scene,
1923 content_origin + vec2f(-scroll_left, line_y),
1924 visible_text_bounds,
1925 line_height,
1926 cx,
1927 );
1928
1929 self.draw_invisibles(
1930 &selection_ranges,
1931 layout,
1932 content_origin,
1933 scroll_left,
1934 line_y,
1935 row,
1936 scene,
1937 visible_bounds,
1938 line_height,
1939 whitespace_setting,
1940 cx,
1941 );
1942 }
1943
1944 fn draw_invisibles(
1945 &self,
1946 selection_ranges: &[Range<DisplayPoint>],
1947 layout: &LayoutState,
1948 content_origin: Vector2F,
1949 scroll_left: f32,
1950 line_y: f32,
1951 row: u32,
1952 scene: &mut SceneBuilder,
1953 visible_bounds: RectF,
1954 line_height: f32,
1955 whitespace_setting: ShowWhitespaceSetting,
1956 cx: &mut ViewContext<Editor>,
1957 ) {
1958 let allowed_invisibles_regions = match whitespace_setting {
1959 ShowWhitespaceSetting::None => return,
1960 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1961 ShowWhitespaceSetting::All => None,
1962 };
1963
1964 for invisible in &self.invisibles {
1965 let (&token_offset, invisible_symbol) = match invisible {
1966 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1967 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1968 };
1969
1970 let x_offset = self.line.x_for_index(token_offset);
1971 let invisible_offset =
1972 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1973 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1974
1975 if let Some(allowed_regions) = allowed_invisibles_regions {
1976 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1977 if !allowed_regions
1978 .iter()
1979 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1980 {
1981 continue;
1982 }
1983 }
1984 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1985 }
1986 }
1987}
1988
1989#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1990enum Invisible {
1991 Tab { line_start_offset: usize },
1992 Whitespace { line_offset: usize },
1993}
1994
1995impl Element<Editor> for EditorElement {
1996 type LayoutState = LayoutState;
1997 type PaintState = ();
1998
1999 fn layout(
2000 &mut self,
2001 constraint: SizeConstraint,
2002 editor: &mut Editor,
2003 cx: &mut LayoutContext<Editor>,
2004 ) -> (Vector2F, Self::LayoutState) {
2005 let mut size = constraint.max;
2006 if size.x().is_infinite() {
2007 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2008 }
2009
2010 let snapshot = editor.snapshot(cx);
2011 let style = self.style.clone();
2012
2013 let line_height = (style.text.font_size * style.line_height_scalar).round();
2014
2015 let gutter_padding;
2016 let gutter_width;
2017 let gutter_margin;
2018 if snapshot.show_gutter {
2019 let em_width = style.text.em_width(cx.font_cache());
2020 gutter_padding = (em_width * style.gutter_padding_factor).round();
2021 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2022 gutter_margin = -style.text.descent(cx.font_cache());
2023 } else {
2024 gutter_padding = 0.0;
2025 gutter_width = 0.0;
2026 gutter_margin = 0.0;
2027 };
2028
2029 let text_width = size.x() - gutter_width;
2030 let em_width = style.text.em_width(cx.font_cache());
2031 let em_advance = style.text.em_advance(cx.font_cache());
2032 let overscroll = vec2f(em_width, 0.);
2033 let snapshot = {
2034 editor.set_visible_line_count(size.y() / line_height, cx);
2035
2036 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2037 let wrap_width = match editor.soft_wrap_mode(cx) {
2038 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2039 SoftWrap::EditorWidth => editor_width,
2040 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2041 };
2042
2043 if editor.set_wrap_width(Some(wrap_width), cx) {
2044 editor.snapshot(cx)
2045 } else {
2046 snapshot
2047 }
2048 };
2049
2050 let wrap_guides = editor
2051 .wrap_guides(cx)
2052 .iter()
2053 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2054 .collect();
2055
2056 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2057 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2058 size.set_y(
2059 scroll_height
2060 .min(constraint.max_along(Axis::Vertical))
2061 .max(constraint.min_along(Axis::Vertical))
2062 .min(line_height * max_lines as f32),
2063 )
2064 } else if let EditorMode::SingleLine = snapshot.mode {
2065 size.set_y(
2066 line_height
2067 .min(constraint.max_along(Axis::Vertical))
2068 .max(constraint.min_along(Axis::Vertical)),
2069 )
2070 } else if size.y().is_infinite() {
2071 size.set_y(scroll_height);
2072 }
2073 let gutter_size = vec2f(gutter_width, size.y());
2074 let text_size = vec2f(text_width, size.y());
2075
2076 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2077 let mut snapshot = editor.snapshot(cx);
2078
2079 let scroll_position = snapshot.scroll_position();
2080 // The scroll position is a fractional point, the whole number of which represents
2081 // the top of the window in terms of display rows.
2082 let start_row = scroll_position.y() as u32;
2083 let height_in_lines = size.y() / line_height;
2084 let max_row = snapshot.max_point().row();
2085
2086 // Add 1 to ensure selections bleed off screen
2087 let end_row = 1 + cmp::min(
2088 (scroll_position.y() + height_in_lines).ceil() as u32,
2089 max_row,
2090 );
2091
2092 let start_anchor = if start_row == 0 {
2093 Anchor::min()
2094 } else {
2095 snapshot
2096 .buffer_snapshot
2097 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2098 };
2099 let end_anchor = if end_row > max_row {
2100 Anchor::max()
2101 } else {
2102 snapshot
2103 .buffer_snapshot
2104 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2105 };
2106
2107 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2108 let mut active_rows = BTreeMap::new();
2109 let mut fold_ranges = Vec::new();
2110 let is_singleton = editor.is_singleton(cx);
2111
2112 let highlighted_rows = editor.highlighted_rows();
2113 let theme = theme::current(cx);
2114 let highlighted_ranges = editor.background_highlights_in_range(
2115 start_anchor..end_anchor,
2116 &snapshot.display_snapshot,
2117 theme.as_ref(),
2118 );
2119
2120 fold_ranges.extend(
2121 snapshot
2122 .folds_in_range(start_anchor..end_anchor)
2123 .map(|anchor| {
2124 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2125 (
2126 start.row,
2127 start.to_display_point(&snapshot.display_snapshot)
2128 ..anchor.end.to_display_point(&snapshot),
2129 )
2130 }),
2131 );
2132
2133 let mut remote_selections = HashMap::default();
2134 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2135 .buffer_snapshot
2136 .remote_selections_in_range(&(start_anchor..end_anchor))
2137 {
2138 // The local selections match the leader's selections.
2139 if Some(replica_id) == editor.leader_replica_id {
2140 continue;
2141 }
2142 remote_selections
2143 .entry(replica_id)
2144 .or_insert(Vec::new())
2145 .push(SelectionLayout::new(
2146 selection,
2147 line_mode,
2148 cursor_shape,
2149 &snapshot.display_snapshot,
2150 false,
2151 ));
2152 }
2153 selections.extend(remote_selections);
2154
2155 if editor.show_local_selections {
2156 let mut local_selections = editor
2157 .selections
2158 .disjoint_in_range(start_anchor..end_anchor, cx);
2159 local_selections.extend(editor.selections.pending(cx));
2160 let newest = editor.selections.newest(cx);
2161 for selection in &local_selections {
2162 let is_empty = selection.start == selection.end;
2163 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2164 let selection_end = snapshot.next_line_boundary(selection.end).1;
2165 for row in cmp::max(selection_start.row(), start_row)
2166 ..=cmp::min(selection_end.row(), end_row)
2167 {
2168 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2169 *contains_non_empty_selection |= !is_empty;
2170 }
2171 }
2172
2173 // Render the local selections in the leader's color when following.
2174 let local_replica_id = editor
2175 .leader_replica_id
2176 .unwrap_or_else(|| editor.replica_id(cx));
2177
2178 selections.push((
2179 local_replica_id,
2180 local_selections
2181 .into_iter()
2182 .map(|selection| {
2183 let is_newest = selection == newest;
2184 SelectionLayout::new(
2185 selection,
2186 editor.selections.line_mode,
2187 editor.cursor_shape,
2188 &snapshot.display_snapshot,
2189 is_newest,
2190 )
2191 })
2192 .collect(),
2193 ));
2194 }
2195
2196 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2197 let show_scrollbars = match scrollbar_settings.show {
2198 ShowScrollbar::Auto => {
2199 // Git
2200 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2201 ||
2202 // Selections
2203 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2204 // Scrollmanager
2205 || editor.scroll_manager.scrollbars_visible()
2206 }
2207 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2208 ShowScrollbar::Always => true,
2209 ShowScrollbar::Never => false,
2210 };
2211
2212 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2213 .into_iter()
2214 .map(|(id, fold)| {
2215 let color = self
2216 .style
2217 .folds
2218 .ellipses
2219 .background
2220 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2221 .color;
2222
2223 (id, fold, color)
2224 })
2225 .collect();
2226
2227 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2228 start_row..end_row,
2229 &active_rows,
2230 is_singleton,
2231 &snapshot,
2232 cx,
2233 );
2234
2235 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2236
2237 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2238
2239 let mut max_visible_line_width = 0.0;
2240 let line_layouts =
2241 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2242 for line_with_invisibles in &line_layouts {
2243 if line_with_invisibles.line.width() > max_visible_line_width {
2244 max_visible_line_width = line_with_invisibles.line.width();
2245 }
2246 }
2247
2248 let style = self.style.clone();
2249 let longest_line_width = layout_line(
2250 snapshot.longest_row(),
2251 &snapshot,
2252 &style,
2253 cx.text_layout_cache(),
2254 )
2255 .width();
2256 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2257 let em_width = style.text.em_width(cx.font_cache());
2258 let (scroll_width, blocks) = self.layout_blocks(
2259 start_row..end_row,
2260 &snapshot,
2261 size.x(),
2262 scroll_width,
2263 gutter_padding,
2264 gutter_width,
2265 em_width,
2266 gutter_width + gutter_margin,
2267 line_height,
2268 &style,
2269 &line_layouts,
2270 editor,
2271 cx,
2272 );
2273
2274 let scroll_max = vec2f(
2275 ((scroll_width - text_size.x()) / em_width).max(0.0),
2276 max_row as f32,
2277 );
2278
2279 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2280
2281 let autoscrolled = if autoscroll_horizontally {
2282 editor.autoscroll_horizontally(
2283 start_row,
2284 text_size.x(),
2285 scroll_width,
2286 em_width,
2287 &line_layouts,
2288 cx,
2289 )
2290 } else {
2291 false
2292 };
2293
2294 if clamped || autoscrolled {
2295 snapshot = editor.snapshot(cx);
2296 }
2297
2298 let newest_selection_head = editor
2299 .selections
2300 .newest::<usize>(cx)
2301 .head()
2302 .to_display_point(&snapshot);
2303 let style = editor.style(cx);
2304
2305 let mut context_menu = None;
2306 let mut code_actions_indicator = None;
2307 if (start_row..end_row).contains(&newest_selection_head.row()) {
2308 if editor.context_menu_visible() {
2309 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2310 }
2311
2312 let active = matches!(
2313 editor.context_menu,
2314 Some(crate::ContextMenu::CodeActions(_))
2315 );
2316
2317 code_actions_indicator = editor
2318 .render_code_actions_indicator(&style, active, cx)
2319 .map(|indicator| (newest_selection_head.row(), indicator));
2320 }
2321
2322 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2323 let mut hover = editor
2324 .hover_state
2325 .render(&snapshot, &style, visible_rows, cx);
2326 let mode = editor.mode;
2327
2328 let mut fold_indicators = editor.render_fold_indicators(
2329 fold_statuses,
2330 &style,
2331 editor.gutter_hovered,
2332 line_height,
2333 gutter_margin,
2334 cx,
2335 );
2336
2337 if let Some((_, context_menu)) = context_menu.as_mut() {
2338 context_menu.layout(
2339 SizeConstraint {
2340 min: Vector2F::zero(),
2341 max: vec2f(
2342 cx.window_size().x() * 0.7,
2343 (12. * line_height).min((size.y() - line_height) / 2.),
2344 ),
2345 },
2346 editor,
2347 cx,
2348 );
2349 }
2350
2351 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2352 indicator.layout(
2353 SizeConstraint::strict_along(
2354 Axis::Vertical,
2355 line_height * style.code_actions.vertical_scale,
2356 ),
2357 editor,
2358 cx,
2359 );
2360 }
2361
2362 for fold_indicator in fold_indicators.iter_mut() {
2363 if let Some(indicator) = fold_indicator.as_mut() {
2364 indicator.layout(
2365 SizeConstraint::strict_along(
2366 Axis::Vertical,
2367 line_height * style.code_actions.vertical_scale,
2368 ),
2369 editor,
2370 cx,
2371 );
2372 }
2373 }
2374
2375 if let Some((_, hover_popovers)) = hover.as_mut() {
2376 for hover_popover in hover_popovers.iter_mut() {
2377 hover_popover.layout(
2378 SizeConstraint {
2379 min: Vector2F::zero(),
2380 max: vec2f(
2381 (120. * em_width) // Default size
2382 .min(size.x() / 2.) // Shrink to half of the editor width
2383 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2384 (16. * line_height) // Default size
2385 .min(size.y() / 2.) // Shrink to half of the editor height
2386 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2387 ),
2388 },
2389 editor,
2390 cx,
2391 );
2392 }
2393 }
2394
2395 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2396 let invisible_symbol_style = RunStyle {
2397 color: self.style.whitespace,
2398 font_id: self.style.text.font_id,
2399 underline: Default::default(),
2400 };
2401
2402 (
2403 size,
2404 LayoutState {
2405 mode,
2406 position_map: Arc::new(PositionMap {
2407 size,
2408 scroll_max,
2409 line_layouts,
2410 line_height,
2411 em_width,
2412 em_advance,
2413 snapshot,
2414 }),
2415 visible_display_row_range: start_row..end_row,
2416 wrap_guides,
2417 gutter_size,
2418 gutter_padding,
2419 text_size,
2420 scrollbar_row_range,
2421 show_scrollbars,
2422 is_singleton,
2423 max_row,
2424 gutter_margin,
2425 active_rows,
2426 highlighted_rows,
2427 highlighted_ranges,
2428 fold_ranges,
2429 line_number_layouts,
2430 display_hunks,
2431 blocks,
2432 selections,
2433 context_menu,
2434 code_actions_indicator,
2435 fold_indicators,
2436 tab_invisible: cx.text_layout_cache().layout_str(
2437 "→",
2438 invisible_symbol_font_size,
2439 &[("→".len(), invisible_symbol_style)],
2440 ),
2441 space_invisible: cx.text_layout_cache().layout_str(
2442 "•",
2443 invisible_symbol_font_size,
2444 &[("•".len(), invisible_symbol_style)],
2445 ),
2446 hover_popovers: hover,
2447 },
2448 )
2449 }
2450
2451 fn paint(
2452 &mut self,
2453 scene: &mut SceneBuilder,
2454 bounds: RectF,
2455 visible_bounds: RectF,
2456 layout: &mut Self::LayoutState,
2457 editor: &mut Editor,
2458 cx: &mut ViewContext<Editor>,
2459 ) -> Self::PaintState {
2460 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2461 scene.push_layer(Some(visible_bounds));
2462
2463 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2464 let text_bounds = RectF::new(
2465 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2466 layout.text_size,
2467 );
2468
2469 Self::attach_mouse_handlers(
2470 scene,
2471 &layout.position_map,
2472 layout.hover_popovers.is_some(),
2473 visible_bounds,
2474 text_bounds,
2475 gutter_bounds,
2476 bounds,
2477 cx,
2478 );
2479
2480 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2481 if layout.gutter_size.x() > 0. {
2482 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2483 }
2484 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2485
2486 scene.push_layer(Some(bounds));
2487 if !layout.blocks.is_empty() {
2488 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2489 }
2490 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2491 scene.pop_layer();
2492
2493 scene.pop_layer();
2494 }
2495
2496 fn rect_for_text_range(
2497 &self,
2498 range_utf16: Range<usize>,
2499 bounds: RectF,
2500 _: RectF,
2501 layout: &Self::LayoutState,
2502 _: &Self::PaintState,
2503 _: &Editor,
2504 _: &ViewContext<Editor>,
2505 ) -> Option<RectF> {
2506 let text_bounds = RectF::new(
2507 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2508 layout.text_size,
2509 );
2510 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2511 let scroll_position = layout.position_map.snapshot.scroll_position();
2512 let start_row = scroll_position.y() as u32;
2513 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2514 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2515
2516 let range_start = OffsetUtf16(range_utf16.start)
2517 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2518 if range_start.row() < start_row {
2519 return None;
2520 }
2521
2522 let line = &layout
2523 .position_map
2524 .line_layouts
2525 .get((range_start.row() - start_row) as usize)?
2526 .line;
2527 let range_start_x = line.x_for_index(range_start.column() as usize);
2528 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2529 Some(RectF::new(
2530 content_origin
2531 + vec2f(
2532 range_start_x,
2533 range_start_y + layout.position_map.line_height,
2534 )
2535 - vec2f(scroll_left, scroll_top),
2536 vec2f(
2537 layout.position_map.em_width,
2538 layout.position_map.line_height,
2539 ),
2540 ))
2541 }
2542
2543 fn debug(
2544 &self,
2545 bounds: RectF,
2546 _: &Self::LayoutState,
2547 _: &Self::PaintState,
2548 _: &Editor,
2549 _: &ViewContext<Editor>,
2550 ) -> json::Value {
2551 json!({
2552 "type": "BufferElement",
2553 "bounds": bounds.to_json()
2554 })
2555 }
2556}
2557
2558type BufferRow = u32;
2559
2560pub struct LayoutState {
2561 position_map: Arc<PositionMap>,
2562 gutter_size: Vector2F,
2563 gutter_padding: f32,
2564 gutter_margin: f32,
2565 text_size: Vector2F,
2566 mode: EditorMode,
2567 wrap_guides: SmallVec<[(f32, bool); 2]>,
2568 visible_display_row_range: Range<u32>,
2569 active_rows: BTreeMap<u32, bool>,
2570 highlighted_rows: Option<Range<u32>>,
2571 line_number_layouts: Vec<Option<text_layout::Line>>,
2572 display_hunks: Vec<DisplayDiffHunk>,
2573 blocks: Vec<BlockLayout>,
2574 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2575 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2576 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2577 scrollbar_row_range: Range<f32>,
2578 show_scrollbars: bool,
2579 is_singleton: bool,
2580 max_row: u32,
2581 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2582 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2583 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2584 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2585 tab_invisible: Line,
2586 space_invisible: Line,
2587}
2588
2589struct PositionMap {
2590 size: Vector2F,
2591 line_height: f32,
2592 scroll_max: Vector2F,
2593 em_width: f32,
2594 em_advance: f32,
2595 line_layouts: Vec<LineWithInvisibles>,
2596 snapshot: EditorSnapshot,
2597}
2598
2599impl PositionMap {
2600 /// Returns two display points:
2601 /// 1. The nearest *valid* position in the editor
2602 /// 2. An unclipped, potentially *invalid* position that maps directly to
2603 /// the given pixel position.
2604 fn point_for_position(
2605 &self,
2606 text_bounds: RectF,
2607 position: Vector2F,
2608 ) -> (DisplayPoint, DisplayPoint) {
2609 let scroll_position = self.snapshot.scroll_position();
2610 let position = position - text_bounds.origin();
2611 let y = position.y().max(0.0).min(self.size.y());
2612 let x = position.x() + (scroll_position.x() * self.em_width);
2613 let row = (y / self.line_height + scroll_position.y()) as u32;
2614 let (column, x_overshoot) = if let Some(line) = self
2615 .line_layouts
2616 .get(row as usize - scroll_position.y() as usize)
2617 .map(|line_with_spaces| &line_with_spaces.line)
2618 {
2619 if let Some(ix) = line.index_for_x(x) {
2620 (ix as u32, 0.0)
2621 } else {
2622 (line.len() as u32, 0f32.max(x - line.width()))
2623 }
2624 } else {
2625 (0, x)
2626 };
2627
2628 let mut target_point = DisplayPoint::new(row, column);
2629 let point = self.snapshot.clip_point(target_point, Bias::Left);
2630 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2631
2632 (point, target_point)
2633 }
2634}
2635
2636struct BlockLayout {
2637 row: u32,
2638 element: AnyElement<Editor>,
2639 style: BlockStyle,
2640}
2641
2642fn layout_line(
2643 row: u32,
2644 snapshot: &EditorSnapshot,
2645 style: &EditorStyle,
2646 layout_cache: &TextLayoutCache,
2647) -> text_layout::Line {
2648 let mut line = snapshot.line(row);
2649
2650 if line.len() > MAX_LINE_LEN {
2651 let mut len = MAX_LINE_LEN;
2652 while !line.is_char_boundary(len) {
2653 len -= 1;
2654 }
2655
2656 line.truncate(len);
2657 }
2658
2659 layout_cache.layout_str(
2660 &line,
2661 style.text.font_size,
2662 &[(
2663 snapshot.line_len(row) as usize,
2664 RunStyle {
2665 font_id: style.text.font_id,
2666 color: Color::black(),
2667 underline: Default::default(),
2668 },
2669 )],
2670 )
2671}
2672
2673#[derive(Debug)]
2674pub struct Cursor {
2675 origin: Vector2F,
2676 block_width: f32,
2677 line_height: f32,
2678 color: Color,
2679 shape: CursorShape,
2680 block_text: Option<Line>,
2681}
2682
2683impl Cursor {
2684 pub fn new(
2685 origin: Vector2F,
2686 block_width: f32,
2687 line_height: f32,
2688 color: Color,
2689 shape: CursorShape,
2690 block_text: Option<Line>,
2691 ) -> Cursor {
2692 Cursor {
2693 origin,
2694 block_width,
2695 line_height,
2696 color,
2697 shape,
2698 block_text,
2699 }
2700 }
2701
2702 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2703 RectF::new(
2704 self.origin + origin,
2705 vec2f(self.block_width, self.line_height),
2706 )
2707 }
2708
2709 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2710 let bounds = match self.shape {
2711 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2712 CursorShape::Block | CursorShape::Hollow => RectF::new(
2713 self.origin + origin,
2714 vec2f(self.block_width, self.line_height),
2715 ),
2716 CursorShape::Underscore => RectF::new(
2717 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2718 vec2f(self.block_width, 2.0),
2719 ),
2720 };
2721
2722 //Draw background or border quad
2723 if matches!(self.shape, CursorShape::Hollow) {
2724 scene.push_quad(Quad {
2725 bounds,
2726 background: None,
2727 border: Border::all(1., self.color),
2728 corner_radius: 0.,
2729 });
2730 } else {
2731 scene.push_quad(Quad {
2732 bounds,
2733 background: Some(self.color),
2734 border: Default::default(),
2735 corner_radius: 0.,
2736 });
2737 }
2738
2739 if let Some(block_text) = &self.block_text {
2740 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2741 }
2742 }
2743
2744 pub fn shape(&self) -> CursorShape {
2745 self.shape
2746 }
2747}
2748
2749#[derive(Debug)]
2750pub struct HighlightedRange {
2751 pub start_y: f32,
2752 pub line_height: f32,
2753 pub lines: Vec<HighlightedRangeLine>,
2754 pub color: Color,
2755 pub corner_radius: f32,
2756}
2757
2758#[derive(Debug)]
2759pub struct HighlightedRangeLine {
2760 pub start_x: f32,
2761 pub end_x: f32,
2762}
2763
2764impl HighlightedRange {
2765 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2766 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2767 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2768 self.paint_lines(
2769 self.start_y + self.line_height,
2770 &self.lines[1..],
2771 bounds,
2772 scene,
2773 );
2774 } else {
2775 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2776 }
2777 }
2778
2779 fn paint_lines(
2780 &self,
2781 start_y: f32,
2782 lines: &[HighlightedRangeLine],
2783 bounds: RectF,
2784 scene: &mut SceneBuilder,
2785 ) {
2786 if lines.is_empty() {
2787 return;
2788 }
2789
2790 let mut path = PathBuilder::new();
2791 let first_line = lines.first().unwrap();
2792 let last_line = lines.last().unwrap();
2793
2794 let first_top_left = vec2f(first_line.start_x, start_y);
2795 let first_top_right = vec2f(first_line.end_x, start_y);
2796
2797 let curve_height = vec2f(0., self.corner_radius);
2798 let curve_width = |start_x: f32, end_x: f32| {
2799 let max = (end_x - start_x) / 2.;
2800 let width = if max < self.corner_radius {
2801 max
2802 } else {
2803 self.corner_radius
2804 };
2805
2806 vec2f(width, 0.)
2807 };
2808
2809 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2810 path.reset(first_top_right - top_curve_width);
2811 path.curve_to(first_top_right + curve_height, first_top_right);
2812
2813 let mut iter = lines.iter().enumerate().peekable();
2814 while let Some((ix, line)) = iter.next() {
2815 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2816
2817 if let Some((_, next_line)) = iter.peek() {
2818 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2819
2820 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2821 Ordering::Equal => {
2822 path.line_to(bottom_right);
2823 }
2824 Ordering::Less => {
2825 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2826 path.line_to(bottom_right - curve_height);
2827 if self.corner_radius > 0. {
2828 path.curve_to(bottom_right - curve_width, bottom_right);
2829 }
2830 path.line_to(next_top_right + curve_width);
2831 if self.corner_radius > 0. {
2832 path.curve_to(next_top_right + curve_height, next_top_right);
2833 }
2834 }
2835 Ordering::Greater => {
2836 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2837 path.line_to(bottom_right - curve_height);
2838 if self.corner_radius > 0. {
2839 path.curve_to(bottom_right + curve_width, bottom_right);
2840 }
2841 path.line_to(next_top_right - curve_width);
2842 if self.corner_radius > 0. {
2843 path.curve_to(next_top_right + curve_height, next_top_right);
2844 }
2845 }
2846 }
2847 } else {
2848 let curve_width = curve_width(line.start_x, line.end_x);
2849 path.line_to(bottom_right - curve_height);
2850 if self.corner_radius > 0. {
2851 path.curve_to(bottom_right - curve_width, bottom_right);
2852 }
2853
2854 let bottom_left = vec2f(line.start_x, bottom_right.y());
2855 path.line_to(bottom_left + curve_width);
2856 if self.corner_radius > 0. {
2857 path.curve_to(bottom_left - curve_height, bottom_left);
2858 }
2859 }
2860 }
2861
2862 if first_line.start_x > last_line.start_x {
2863 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2864 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2865 path.line_to(second_top_left + curve_height);
2866 if self.corner_radius > 0. {
2867 path.curve_to(second_top_left + curve_width, second_top_left);
2868 }
2869 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2870 path.line_to(first_bottom_left - curve_width);
2871 if self.corner_radius > 0. {
2872 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2873 }
2874 }
2875
2876 path.line_to(first_top_left + curve_height);
2877 if self.corner_radius > 0. {
2878 path.curve_to(first_top_left + top_curve_width, first_top_left);
2879 }
2880 path.line_to(first_top_right - top_curve_width);
2881
2882 scene.push_path(path.build(self.color, Some(bounds)));
2883 }
2884}
2885
2886fn position_to_display_point(
2887 position: Vector2F,
2888 text_bounds: RectF,
2889 position_map: &PositionMap,
2890) -> Option<DisplayPoint> {
2891 if text_bounds.contains_point(position) {
2892 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2893 if point == target_point {
2894 Some(point)
2895 } else {
2896 None
2897 }
2898 } else {
2899 None
2900 }
2901}
2902
2903fn range_to_bounds(
2904 range: &Range<DisplayPoint>,
2905 content_origin: Vector2F,
2906 scroll_left: f32,
2907 scroll_top: f32,
2908 visible_row_range: &Range<u32>,
2909 line_end_overshoot: f32,
2910 position_map: &PositionMap,
2911) -> impl Iterator<Item = RectF> {
2912 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2913
2914 if range.start == range.end {
2915 return bounds.into_iter();
2916 }
2917
2918 let start_row = visible_row_range.start;
2919 let end_row = visible_row_range.end;
2920
2921 let row_range = if range.end.column() == 0 {
2922 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2923 } else {
2924 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2925 };
2926
2927 let first_y =
2928 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2929
2930 for (idx, row) in row_range.enumerate() {
2931 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2932
2933 let start_x = if row == range.start.row() {
2934 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2935 - scroll_left
2936 } else {
2937 content_origin.x() - scroll_left
2938 };
2939
2940 let end_x = if row == range.end.row() {
2941 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2942 } else {
2943 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2944 };
2945
2946 bounds.push(RectF::from_points(
2947 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2948 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2949 ))
2950 }
2951
2952 bounds.into_iter()
2953}
2954
2955pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2956 delta.powf(1.5) / 100.0
2957}
2958
2959fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2960 delta.powf(1.2) / 300.0
2961}
2962
2963#[cfg(test)]
2964mod tests {
2965 use super::*;
2966 use crate::{
2967 display_map::{BlockDisposition, BlockProperties},
2968 editor_tests::{init_test, update_test_language_settings},
2969 Editor, MultiBuffer,
2970 };
2971 use gpui::TestAppContext;
2972 use language::language_settings;
2973 use log::info;
2974 use std::{num::NonZeroU32, sync::Arc};
2975 use util::test::sample_text;
2976
2977 #[gpui::test]
2978 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2979 init_test(cx, |_| {});
2980
2981 let (_, editor) = cx.add_window(|cx| {
2982 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2983 Editor::new(EditorMode::Full, buffer, None, None, cx)
2984 });
2985 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2986
2987 let layouts = editor.update(cx, |editor, cx| {
2988 let snapshot = editor.snapshot(cx);
2989 element
2990 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2991 .0
2992 });
2993 assert_eq!(layouts.len(), 6);
2994 }
2995
2996 #[gpui::test]
2997 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2998 init_test(cx, |_| {});
2999
3000 let (_, editor) = cx.add_window(|cx| {
3001 let buffer = MultiBuffer::build_simple("", cx);
3002 Editor::new(EditorMode::Full, buffer, None, None, cx)
3003 });
3004
3005 editor.update(cx, |editor, cx| {
3006 editor.set_placeholder_text("hello", cx);
3007 editor.insert_blocks(
3008 [BlockProperties {
3009 style: BlockStyle::Fixed,
3010 disposition: BlockDisposition::Above,
3011 height: 3,
3012 position: Anchor::min(),
3013 render: Arc::new(|_| Empty::new().into_any()),
3014 }],
3015 None,
3016 cx,
3017 );
3018
3019 // Blur the editor so that it displays placeholder text.
3020 cx.blur();
3021 });
3022
3023 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3024 let (size, mut state) = editor.update(cx, |editor, cx| {
3025 let mut new_parents = Default::default();
3026 let mut notify_views_if_parents_change = Default::default();
3027 let mut layout_cx = LayoutContext::new(
3028 cx,
3029 &mut new_parents,
3030 &mut notify_views_if_parents_change,
3031 false,
3032 );
3033 element.layout(
3034 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3035 editor,
3036 &mut layout_cx,
3037 )
3038 });
3039
3040 assert_eq!(state.position_map.line_layouts.len(), 4);
3041 assert_eq!(
3042 state
3043 .line_number_layouts
3044 .iter()
3045 .map(Option::is_some)
3046 .collect::<Vec<_>>(),
3047 &[false, false, false, true]
3048 );
3049
3050 // Don't panic.
3051 let mut scene = SceneBuilder::new(1.0);
3052 let bounds = RectF::new(Default::default(), size);
3053 editor.update(cx, |editor, cx| {
3054 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3055 });
3056 }
3057
3058 #[gpui::test]
3059 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3060 const TAB_SIZE: u32 = 4;
3061
3062 let input_text = "\t \t|\t| a b";
3063 let expected_invisibles = vec![
3064 Invisible::Tab {
3065 line_start_offset: 0,
3066 },
3067 Invisible::Whitespace {
3068 line_offset: TAB_SIZE as usize,
3069 },
3070 Invisible::Tab {
3071 line_start_offset: TAB_SIZE as usize + 1,
3072 },
3073 Invisible::Tab {
3074 line_start_offset: TAB_SIZE as usize * 2 + 1,
3075 },
3076 Invisible::Whitespace {
3077 line_offset: TAB_SIZE as usize * 3 + 1,
3078 },
3079 Invisible::Whitespace {
3080 line_offset: TAB_SIZE as usize * 3 + 3,
3081 },
3082 ];
3083 assert_eq!(
3084 expected_invisibles.len(),
3085 input_text
3086 .chars()
3087 .filter(|initial_char| initial_char.is_whitespace())
3088 .count(),
3089 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3090 );
3091
3092 init_test(cx, |s| {
3093 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3094 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3095 });
3096
3097 let actual_invisibles =
3098 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3099
3100 assert_eq!(expected_invisibles, actual_invisibles);
3101 }
3102
3103 #[gpui::test]
3104 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3105 init_test(cx, |s| {
3106 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3107 s.defaults.tab_size = NonZeroU32::new(4);
3108 });
3109
3110 for editor_mode_without_invisibles in [
3111 EditorMode::SingleLine,
3112 EditorMode::AutoHeight { max_lines: 100 },
3113 ] {
3114 let invisibles = collect_invisibles_from_new_editor(
3115 cx,
3116 editor_mode_without_invisibles,
3117 "\t\t\t| | a b",
3118 500.0,
3119 );
3120 assert!(invisibles.is_empty(),
3121 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3122 }
3123 }
3124
3125 #[gpui::test]
3126 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3127 let tab_size = 4;
3128 let input_text = "a\tbcd ".repeat(9);
3129 let repeated_invisibles = [
3130 Invisible::Tab {
3131 line_start_offset: 1,
3132 },
3133 Invisible::Whitespace {
3134 line_offset: tab_size as usize + 3,
3135 },
3136 Invisible::Whitespace {
3137 line_offset: tab_size as usize + 4,
3138 },
3139 Invisible::Whitespace {
3140 line_offset: tab_size as usize + 5,
3141 },
3142 ];
3143 let expected_invisibles = std::iter::once(repeated_invisibles)
3144 .cycle()
3145 .take(9)
3146 .flatten()
3147 .collect::<Vec<_>>();
3148 assert_eq!(
3149 expected_invisibles.len(),
3150 input_text
3151 .chars()
3152 .filter(|initial_char| initial_char.is_whitespace())
3153 .count(),
3154 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3155 );
3156 info!("Expected invisibles: {expected_invisibles:?}");
3157
3158 init_test(cx, |_| {});
3159
3160 // Put the same string with repeating whitespace pattern into editors of various size,
3161 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3162 let resize_step = 10.0;
3163 let mut editor_width = 200.0;
3164 while editor_width <= 1000.0 {
3165 update_test_language_settings(cx, |s| {
3166 s.defaults.tab_size = NonZeroU32::new(tab_size);
3167 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3168 s.defaults.preferred_line_length = Some(editor_width as u32);
3169 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3170 });
3171
3172 let actual_invisibles =
3173 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3174
3175 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3176 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3177 let mut i = 0;
3178 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3179 i = actual_index;
3180 match expected_invisibles.get(i) {
3181 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3182 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3183 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3184 _ => {
3185 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3186 }
3187 },
3188 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3189 }
3190 }
3191 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3192 assert!(
3193 missing_expected_invisibles.is_empty(),
3194 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3195 );
3196
3197 editor_width += resize_step;
3198 }
3199 }
3200
3201 fn collect_invisibles_from_new_editor(
3202 cx: &mut TestAppContext,
3203 editor_mode: EditorMode,
3204 input_text: &str,
3205 editor_width: f32,
3206 ) -> Vec<Invisible> {
3207 info!(
3208 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3209 );
3210 let (_, editor) = cx.add_window(|cx| {
3211 let buffer = MultiBuffer::build_simple(&input_text, cx);
3212 Editor::new(editor_mode, buffer, None, None, cx)
3213 });
3214
3215 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3216 let (_, layout_state) = editor.update(cx, |editor, cx| {
3217 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3218 editor.set_wrap_width(Some(editor_width), cx);
3219
3220 let mut new_parents = Default::default();
3221 let mut notify_views_if_parents_change = Default::default();
3222 let mut layout_cx = LayoutContext::new(
3223 cx,
3224 &mut new_parents,
3225 &mut notify_views_if_parents_change,
3226 false,
3227 );
3228 element.layout(
3229 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3230 editor,
3231 &mut layout_cx,
3232 )
3233 });
3234
3235 layout_state
3236 .position_map
3237 .line_layouts
3238 .iter()
3239 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3240 .flatten()
3241 .cloned()
3242 .collect()
3243 }
3244}