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 event.end {
176 return;
177 }
178
179 if !Self::mouse_dragged(
180 editor,
181 event.platform_event,
182 position_map.as_ref(),
183 text_bounds,
184 cx,
185 ) {
186 cx.propagate_event()
187 }
188 }
189 })
190 .on_move({
191 let position_map = position_map.clone();
192 move |event, editor, cx| {
193 if !Self::mouse_moved(
194 editor,
195 event.platform_event,
196 &position_map,
197 text_bounds,
198 cx,
199 ) {
200 cx.propagate_event()
201 }
202 }
203 })
204 .on_move_out(move |_, editor: &mut Editor, cx| {
205 if has_popovers {
206 hide_hover(editor, cx);
207 }
208 })
209 .on_scroll({
210 let position_map = position_map.clone();
211 move |event, editor, cx| {
212 if !Self::scroll(
213 editor,
214 event.position,
215 *event.delta.raw(),
216 event.delta.precise(),
217 &position_map,
218 bounds,
219 cx,
220 ) {
221 cx.propagate_event()
222 }
223 }
224 }),
225 );
226
227 enum GutterHandlers {}
228 scene.push_mouse_region(
229 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
230 .on_hover(|hover, editor: &mut Editor, cx| {
231 editor.gutter_hover(
232 &GutterHover {
233 hovered: hover.started,
234 },
235 cx,
236 );
237 }),
238 )
239 }
240
241 fn mouse_down(
242 editor: &mut Editor,
243 MouseButtonEvent {
244 position,
245 modifiers:
246 Modifiers {
247 shift,
248 ctrl,
249 alt,
250 cmd,
251 ..
252 },
253 mut click_count,
254 ..
255 }: MouseButtonEvent,
256 position_map: &PositionMap,
257 text_bounds: RectF,
258 gutter_bounds: RectF,
259 cx: &mut EventContext<Editor>,
260 ) -> bool {
261 if gutter_bounds.contains_point(position) {
262 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
263 } else if !text_bounds.contains_point(position) {
264 return false;
265 }
266
267 let (position, target_position) = position_map.point_for_position(text_bounds, position);
268
269 if shift && alt {
270 editor.select(
271 SelectPhase::BeginColumnar {
272 position,
273 goal_column: target_position.column(),
274 },
275 cx,
276 );
277 } else if shift && !ctrl && !alt && !cmd {
278 editor.select(
279 SelectPhase::Extend {
280 position,
281 click_count,
282 },
283 cx,
284 );
285 } else {
286 editor.select(
287 SelectPhase::Begin {
288 position,
289 add: alt,
290 click_count,
291 },
292 cx,
293 );
294 }
295
296 true
297 }
298
299 fn mouse_right_down(
300 editor: &mut Editor,
301 position: Vector2F,
302 position_map: &PositionMap,
303 text_bounds: RectF,
304 cx: &mut EventContext<Editor>,
305 ) -> bool {
306 if !text_bounds.contains_point(position) {
307 return false;
308 }
309
310 let (point, _) = position_map.point_for_position(text_bounds, position);
311 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
312 true
313 }
314
315 fn mouse_up(
316 editor: &mut Editor,
317 position: Vector2F,
318 cmd: bool,
319 shift: bool,
320 alt: bool,
321 position_map: &PositionMap,
322 text_bounds: RectF,
323 cx: &mut EventContext<Editor>,
324 ) -> bool {
325 let end_selection = editor.has_pending_selection();
326 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
327
328 if end_selection {
329 editor.select(SelectPhase::End, cx);
330 }
331
332 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
333 let (point, target_point) = position_map.point_for_position(text_bounds, position);
334
335 if point == target_point {
336 if shift {
337 go_to_fetched_type_definition(editor, point, alt, cx);
338 } else {
339 go_to_fetched_definition(editor, point, alt, cx);
340 }
341
342 return true;
343 }
344 }
345
346 end_selection
347 }
348
349 fn mouse_dragged(
350 editor: &mut Editor,
351 MouseMovedEvent {
352 modifiers: Modifiers { cmd, shift, .. },
353 position,
354 ..
355 }: MouseMovedEvent,
356 position_map: &PositionMap,
357 text_bounds: RectF,
358 cx: &mut EventContext<Editor>,
359 ) -> bool {
360 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
361 // Don't trigger hover popover if mouse is hovering over context menu
362 let point = if text_bounds.contains_point(position) {
363 let (point, target_point) = position_map.point_for_position(text_bounds, position);
364 if point == target_point {
365 Some(point)
366 } else {
367 None
368 }
369 } else {
370 None
371 };
372
373 update_go_to_definition_link(editor, point, cmd, shift, cx);
374
375 if editor.has_pending_selection() {
376 let mut scroll_delta = Vector2F::zero();
377
378 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
379 let top = text_bounds.origin_y() + vertical_margin;
380 let bottom = text_bounds.lower_left().y() - vertical_margin;
381 if position.y() < top {
382 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
383 }
384 if position.y() > bottom {
385 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
386 }
387
388 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
389 let left = text_bounds.origin_x() + horizontal_margin;
390 let right = text_bounds.upper_right().x() - horizontal_margin;
391 if position.x() < left {
392 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
393 left - position.x(),
394 ))
395 }
396 if position.x() > right {
397 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
398 position.x() - right,
399 ))
400 }
401
402 let (position, target_position) =
403 position_map.point_for_position(text_bounds, position);
404
405 editor.select(
406 SelectPhase::Update {
407 position,
408 goal_column: target_position.column(),
409 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
410 .clamp(Vector2F::zero(), position_map.scroll_max),
411 },
412 cx,
413 );
414 hover_at(editor, point, cx);
415 true
416 } else {
417 hover_at(editor, point, cx);
418 false
419 }
420 }
421
422 fn mouse_moved(
423 editor: &mut Editor,
424 MouseMovedEvent {
425 modifiers: Modifiers { shift, cmd, .. },
426 position,
427 ..
428 }: MouseMovedEvent,
429 position_map: &PositionMap,
430 text_bounds: RectF,
431 cx: &mut ViewContext<Editor>,
432 ) -> bool {
433 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
434 // Don't trigger hover popover if mouse is hovering over context menu
435 let point = position_to_display_point(position, text_bounds, position_map);
436
437 update_go_to_definition_link(editor, point, cmd, shift, cx);
438 hover_at(editor, point, cx);
439
440 true
441 }
442
443 fn scroll(
444 editor: &mut Editor,
445 position: Vector2F,
446 mut delta: Vector2F,
447 precise: bool,
448 position_map: &PositionMap,
449 bounds: RectF,
450 cx: &mut ViewContext<Editor>,
451 ) -> bool {
452 if !bounds.contains_point(position) {
453 return false;
454 }
455
456 let line_height = position_map.line_height;
457 let max_glyph_width = position_map.em_width;
458
459 let axis = if precise {
460 //Trackpad
461 position_map.snapshot.ongoing_scroll.filter(&mut delta)
462 } else {
463 //Not trackpad
464 delta *= vec2f(max_glyph_width, line_height);
465 None //Resets ongoing scroll
466 };
467
468 let scroll_position = position_map.snapshot.scroll_position();
469 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
470 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
471 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
472 editor.scroll(scroll_position, axis, cx);
473
474 true
475 }
476
477 fn paint_background(
478 &self,
479 scene: &mut SceneBuilder,
480 gutter_bounds: RectF,
481 text_bounds: RectF,
482 layout: &LayoutState,
483 ) {
484 let bounds = gutter_bounds.union_rect(text_bounds);
485 let scroll_top =
486 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
487 scene.push_quad(Quad {
488 bounds: gutter_bounds,
489 background: Some(self.style.gutter_background),
490 border: Border::new(0., Color::transparent_black()),
491 corner_radius: 0.,
492 });
493 scene.push_quad(Quad {
494 bounds: text_bounds,
495 background: Some(self.style.background),
496 border: Border::new(0., Color::transparent_black()),
497 corner_radius: 0.,
498 });
499
500 if let EditorMode::Full = layout.mode {
501 let mut active_rows = layout.active_rows.iter().peekable();
502 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
503 let mut end_row = *start_row;
504 while active_rows.peek().map_or(false, |r| {
505 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
506 }) {
507 active_rows.next().unwrap();
508 end_row += 1;
509 }
510
511 if !contains_non_empty_selection {
512 let origin = vec2f(
513 bounds.origin_x(),
514 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
515 - scroll_top,
516 );
517 let size = vec2f(
518 bounds.width(),
519 layout.position_map.line_height * (end_row - start_row + 1) as f32,
520 );
521 scene.push_quad(Quad {
522 bounds: RectF::new(origin, size),
523 background: Some(self.style.active_line_background),
524 border: Border::default(),
525 corner_radius: 0.,
526 });
527 }
528 }
529
530 if let Some(highlighted_rows) = &layout.highlighted_rows {
531 let origin = vec2f(
532 bounds.origin_x(),
533 bounds.origin_y()
534 + (layout.position_map.line_height * highlighted_rows.start as f32)
535 - scroll_top,
536 );
537 let size = vec2f(
538 bounds.width(),
539 layout.position_map.line_height * highlighted_rows.len() as f32,
540 );
541 scene.push_quad(Quad {
542 bounds: RectF::new(origin, size),
543 background: Some(self.style.highlighted_line_background),
544 border: Border::default(),
545 corner_radius: 0.,
546 });
547 }
548
549 let scroll_left =
550 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
551
552 for (wrap_position, active) in layout.wrap_guides.iter() {
553 let x =
554 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
555 - scroll_left;
556
557 if x < text_bounds.origin_x()
558 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
559 {
560 continue;
561 }
562
563 let color = if *active {
564 self.style.active_wrap_guide
565 } else {
566 self.style.wrap_guide
567 };
568 scene.push_quad(Quad {
569 bounds: RectF::new(
570 vec2f(x, text_bounds.origin_y()),
571 vec2f(1., text_bounds.height()),
572 ),
573 background: Some(color),
574 border: Border::new(0., Color::transparent_black()),
575 corner_radius: 0.,
576 });
577 }
578 }
579 }
580
581 fn paint_gutter(
582 &mut self,
583 scene: &mut SceneBuilder,
584 bounds: RectF,
585 visible_bounds: RectF,
586 layout: &mut LayoutState,
587 editor: &mut Editor,
588 cx: &mut ViewContext<Editor>,
589 ) {
590 let line_height = layout.position_map.line_height;
591
592 let scroll_position = layout.position_map.snapshot.scroll_position();
593 let scroll_top = scroll_position.y() * line_height;
594
595 let show_gutter = matches!(
596 settings::get::<ProjectSettings>(cx).git.git_gutter,
597 Some(GitGutterSetting::TrackedFiles)
598 );
599
600 if show_gutter {
601 Self::paint_diff_hunks(scene, bounds, layout, cx);
602 }
603
604 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
605 if let Some(line) = line {
606 let line_origin = bounds.origin()
607 + vec2f(
608 bounds.width() - line.width() - layout.gutter_padding,
609 ix as f32 * line_height - (scroll_top % line_height),
610 );
611
612 line.paint(scene, line_origin, visible_bounds, line_height, cx);
613 }
614 }
615
616 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
617 if let Some(indicator) = fold_indicator.as_mut() {
618 let position = vec2f(
619 bounds.width() - layout.gutter_padding,
620 ix as f32 * line_height - (scroll_top % line_height),
621 );
622 let centering_offset = vec2f(
623 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
624 (line_height - indicator.size().y()) / 2.,
625 );
626
627 let indicator_origin = bounds.origin() + position + centering_offset;
628
629 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
630 }
631 }
632
633 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
634 let mut x = 0.;
635 let mut y = *row as f32 * line_height - scroll_top;
636 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
637 y += (line_height - indicator.size().y()) / 2.;
638 indicator.paint(
639 scene,
640 bounds.origin() + vec2f(x, y),
641 visible_bounds,
642 editor,
643 cx,
644 );
645 }
646 }
647
648 fn paint_diff_hunks(
649 scene: &mut SceneBuilder,
650 bounds: RectF,
651 layout: &mut LayoutState,
652 cx: &mut ViewContext<Editor>,
653 ) {
654 let diff_style = &theme::current(cx).editor.diff.clone();
655 let line_height = layout.position_map.line_height;
656
657 let scroll_position = layout.position_map.snapshot.scroll_position();
658 let scroll_top = scroll_position.y() * line_height;
659
660 for hunk in &layout.display_hunks {
661 let (display_row_range, status) = match hunk {
662 //TODO: This rendering is entirely a horrible hack
663 &DisplayDiffHunk::Folded { display_row: row } => {
664 let start_y = row as f32 * line_height - scroll_top;
665 let end_y = start_y + line_height;
666
667 let width = diff_style.removed_width_em * line_height;
668 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
669 let highlight_size = vec2f(width * 2., end_y - start_y);
670 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
671
672 scene.push_quad(Quad {
673 bounds: highlight_bounds,
674 background: Some(diff_style.modified),
675 border: Border::new(0., Color::transparent_black()),
676 corner_radius: 1. * line_height,
677 });
678
679 continue;
680 }
681
682 DisplayDiffHunk::Unfolded {
683 display_row_range,
684 status,
685 } => (display_row_range, status),
686 };
687
688 let color = match status {
689 DiffHunkStatus::Added => diff_style.inserted,
690 DiffHunkStatus::Modified => diff_style.modified,
691
692 //TODO: This rendering is entirely a horrible hack
693 DiffHunkStatus::Removed => {
694 let row = display_row_range.start;
695
696 let offset = line_height / 2.;
697 let start_y = row as f32 * line_height - offset - scroll_top;
698 let end_y = start_y + line_height;
699
700 let width = diff_style.removed_width_em * line_height;
701 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
702 let highlight_size = vec2f(width * 2., end_y - start_y);
703 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
704
705 scene.push_quad(Quad {
706 bounds: highlight_bounds,
707 background: Some(diff_style.deleted),
708 border: Border::new(0., Color::transparent_black()),
709 corner_radius: 1. * line_height,
710 });
711
712 continue;
713 }
714 };
715
716 let start_row = display_row_range.start;
717 let end_row = display_row_range.end;
718
719 let start_y = start_row as f32 * line_height - scroll_top;
720 let end_y = end_row as f32 * line_height - scroll_top;
721
722 let width = diff_style.width_em * line_height;
723 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
724 let highlight_size = vec2f(width * 2., end_y - start_y);
725 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
726
727 scene.push_quad(Quad {
728 bounds: highlight_bounds,
729 background: Some(color),
730 border: Border::new(0., Color::transparent_black()),
731 corner_radius: diff_style.corner_radius * line_height,
732 });
733 }
734 }
735
736 fn paint_text(
737 &mut self,
738 scene: &mut SceneBuilder,
739 bounds: RectF,
740 visible_bounds: RectF,
741 layout: &mut LayoutState,
742 editor: &mut Editor,
743 cx: &mut ViewContext<Editor>,
744 ) {
745 let style = &self.style;
746 let local_replica_id = editor.replica_id(cx);
747 let scroll_position = layout.position_map.snapshot.scroll_position();
748 let start_row = layout.visible_display_row_range.start;
749 let scroll_top = scroll_position.y() * layout.position_map.line_height;
750 let max_glyph_width = layout.position_map.em_width;
751 let scroll_left = scroll_position.x() * max_glyph_width;
752 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
753 let line_end_overshoot = 0.15 * layout.position_map.line_height;
754 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
755
756 scene.push_layer(Some(bounds));
757
758 scene.push_cursor_region(CursorRegion {
759 bounds,
760 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
761 CursorStyle::PointingHand
762 } else {
763 CursorStyle::IBeam
764 },
765 });
766
767 let fold_corner_radius =
768 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
769 for (id, range, color) in layout.fold_ranges.iter() {
770 self.paint_highlighted_range(
771 scene,
772 range.clone(),
773 *color,
774 fold_corner_radius,
775 fold_corner_radius * 2.,
776 layout,
777 content_origin,
778 scroll_top,
779 scroll_left,
780 bounds,
781 );
782
783 for bound in range_to_bounds(
784 &range,
785 content_origin,
786 scroll_left,
787 scroll_top,
788 &layout.visible_display_row_range,
789 line_end_overshoot,
790 &layout.position_map,
791 ) {
792 scene.push_cursor_region(CursorRegion {
793 bounds: bound,
794 style: CursorStyle::PointingHand,
795 });
796
797 let display_row = range.start.row();
798
799 let buffer_row = DisplayPoint::new(display_row, 0)
800 .to_point(&layout.position_map.snapshot.display_snapshot)
801 .row;
802
803 scene.push_mouse_region(
804 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
805 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
806 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
807 })
808 .with_notify_on_hover(true)
809 .with_notify_on_click(true),
810 )
811 }
812 }
813
814 for (range, color) in &layout.highlighted_ranges {
815 self.paint_highlighted_range(
816 scene,
817 range.clone(),
818 *color,
819 0.,
820 line_end_overshoot,
821 layout,
822 content_origin,
823 scroll_top,
824 scroll_left,
825 bounds,
826 );
827 }
828
829 let mut cursors = SmallVec::<[Cursor; 32]>::new();
830 let corner_radius = 0.15 * layout.position_map.line_height;
831 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
832
833 for (replica_id, selections) in &layout.selections {
834 let replica_id = *replica_id;
835 let selection_style = style.replica_selection_style(replica_id);
836
837 for selection in selections {
838 if !selection.range.is_empty()
839 && (replica_id == local_replica_id
840 || Some(replica_id) == editor.leader_replica_id)
841 {
842 invisible_display_ranges.push(selection.range.clone());
843 }
844 self.paint_highlighted_range(
845 scene,
846 selection.range.clone(),
847 selection_style.selection,
848 corner_radius,
849 corner_radius * 2.,
850 layout,
851 content_origin,
852 scroll_top,
853 scroll_left,
854 bounds,
855 );
856
857 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
858 let cursor_position = selection.head;
859 if layout
860 .visible_display_row_range
861 .contains(&cursor_position.row())
862 {
863 let cursor_row_layout = &layout.position_map.line_layouts
864 [(cursor_position.row() - start_row) as usize]
865 .line;
866 let cursor_column = cursor_position.column() as usize;
867
868 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
869 let mut block_width =
870 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
871 if block_width == 0.0 {
872 block_width = layout.position_map.em_width;
873 }
874 let block_text = if let CursorShape::Block = selection.cursor_shape {
875 layout
876 .position_map
877 .snapshot
878 .chars_at(cursor_position)
879 .next()
880 .and_then(|(character, _)| {
881 let font_id =
882 cursor_row_layout.font_for_index(cursor_column)?;
883 let text = character.to_string();
884
885 Some(cx.text_layout_cache().layout_str(
886 &text,
887 cursor_row_layout.font_size(),
888 &[(
889 text.len(),
890 RunStyle {
891 font_id,
892 color: style.background,
893 underline: Default::default(),
894 },
895 )],
896 ))
897 })
898 } else {
899 None
900 };
901
902 let x = cursor_character_x - scroll_left;
903 let y = cursor_position.row() as f32 * layout.position_map.line_height
904 - scroll_top;
905 if selection.is_newest {
906 editor.pixel_position_of_newest_cursor = Some(vec2f(
907 bounds.origin_x() + x + block_width / 2.,
908 bounds.origin_y() + y + layout.position_map.line_height / 2.,
909 ));
910 }
911 cursors.push(Cursor {
912 color: selection_style.cursor,
913 block_width,
914 origin: vec2f(x, y),
915 line_height: layout.position_map.line_height,
916 shape: selection.cursor_shape,
917 block_text,
918 });
919 }
920 }
921 }
922 }
923
924 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
925 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
926 let row = start_row + ix as u32;
927 line_with_invisibles.draw(
928 layout,
929 row,
930 scroll_top,
931 scene,
932 content_origin,
933 scroll_left,
934 visible_text_bounds,
935 whitespace_setting,
936 &invisible_display_ranges,
937 visible_bounds,
938 cx,
939 )
940 }
941 }
942
943 scene.paint_layer(Some(bounds), |scene| {
944 for cursor in cursors {
945 cursor.paint(scene, content_origin, cx);
946 }
947 });
948
949 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
950 scene.push_stacking_context(None, None);
951 let cursor_row_layout =
952 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
953 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
954 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
955 let mut list_origin = content_origin + vec2f(x, y);
956 let list_width = context_menu.size().x();
957 let list_height = context_menu.size().y();
958
959 // Snap the right edge of the list to the right edge of the window if
960 // its horizontal bounds overflow.
961 if list_origin.x() + list_width > cx.window_size().x() {
962 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
963 }
964
965 if list_origin.y() + list_height > bounds.max_y() {
966 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
967 }
968
969 context_menu.paint(
970 scene,
971 list_origin,
972 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
973 editor,
974 cx,
975 );
976
977 scene.pop_stacking_context();
978 }
979
980 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
981 scene.push_stacking_context(None, None);
982
983 // This is safe because we check on layout whether the required row is available
984 let hovered_row_layout =
985 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
986
987 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
988 // height. This is the size we will use to decide whether to render popovers above or below
989 // the hovered line.
990 let first_size = hover_popovers[0].size();
991 let height_to_reserve = first_size.y()
992 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
993
994 // Compute Hovered Point
995 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
996 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
997 let hovered_point = content_origin + vec2f(x, y);
998
999 if hovered_point.y() - height_to_reserve > 0.0 {
1000 // There is enough space above. Render popovers above the hovered point
1001 let mut current_y = hovered_point.y();
1002 for hover_popover in hover_popovers {
1003 let size = hover_popover.size();
1004 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1005
1006 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1007 if x_out_of_bounds < 0.0 {
1008 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1009 }
1010
1011 hover_popover.paint(
1012 scene,
1013 popover_origin,
1014 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1015 editor,
1016 cx,
1017 );
1018
1019 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1020 }
1021 } else {
1022 // There is not enough space above. Render popovers below the hovered point
1023 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1024 for hover_popover in hover_popovers {
1025 let size = hover_popover.size();
1026 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1027
1028 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1029 if x_out_of_bounds < 0.0 {
1030 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1031 }
1032
1033 hover_popover.paint(
1034 scene,
1035 popover_origin,
1036 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1037 editor,
1038 cx,
1039 );
1040
1041 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1042 }
1043 }
1044
1045 scene.pop_stacking_context();
1046 }
1047
1048 scene.pop_layer();
1049 }
1050
1051 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1052 bounds.max_x() - self.style.theme.scrollbar.width
1053 }
1054
1055 fn paint_scrollbar(
1056 &mut self,
1057 scene: &mut SceneBuilder,
1058 bounds: RectF,
1059 layout: &mut LayoutState,
1060 cx: &mut ViewContext<Editor>,
1061 editor: &Editor,
1062 ) {
1063 enum ScrollbarMouseHandlers {}
1064 if layout.mode != EditorMode::Full {
1065 return;
1066 }
1067
1068 let style = &self.style.theme.scrollbar;
1069
1070 let top = bounds.min_y();
1071 let bottom = bounds.max_y();
1072 let right = bounds.max_x();
1073 let left = self.scrollbar_left(&bounds);
1074 let row_range = &layout.scrollbar_row_range;
1075 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1076
1077 let mut height = bounds.height();
1078 let mut first_row_y_offset = 0.0;
1079
1080 // Impose a minimum height on the scrollbar thumb
1081 let row_height = height / max_row;
1082 let min_thumb_height =
1083 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1084 let thumb_height = (row_range.end - row_range.start) * row_height;
1085 if thumb_height < min_thumb_height {
1086 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1087 height -= min_thumb_height - thumb_height;
1088 }
1089
1090 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1091
1092 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1093 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1094 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1095 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1096
1097 if layout.show_scrollbars {
1098 scene.push_quad(Quad {
1099 bounds: track_bounds,
1100 border: style.track.border,
1101 background: style.track.background_color,
1102 ..Default::default()
1103 });
1104 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1105 let theme = theme::current(cx);
1106 let scrollbar_theme = &theme.editor.scrollbar;
1107 if layout.is_singleton && scrollbar_settings.selections {
1108 let start_anchor = Anchor::min();
1109 let end_anchor = Anchor::max();
1110 let color = scrollbar_theme.selections;
1111 let border = Border {
1112 width: 1.,
1113 color: style.thumb.border.color,
1114 overlay: false,
1115 top: false,
1116 right: true,
1117 bottom: false,
1118 left: true,
1119 };
1120 let mut push_region = |start: u32, end: u32| {
1121 let start_y = y_for_row(start as f32);
1122 let mut end_y = y_for_row(end as f32);
1123 if end_y - start_y < 1. {
1124 end_y = start_y + 1.;
1125 }
1126 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1127
1128 scene.push_quad(Quad {
1129 bounds,
1130 background: Some(color),
1131 border,
1132 corner_radius: style.thumb.corner_radius,
1133 })
1134 };
1135 let start = std::time::Instant::now();
1136
1137 let background_ranges = editor
1138 .selected_rows::<crate::items::BufferSearchHighlights>(
1139 start_anchor..end_anchor,
1140 &layout.position_map.snapshot,
1141 &theme,
1142 );
1143 dbg!(start.elapsed().as_millis());
1144 for row in background_ranges {
1145 let start = row.start();
1146 let end = row.end();
1147 push_region(*start, *end);
1148 }
1149 }
1150
1151 if layout.is_singleton && scrollbar_settings.git_diff {
1152 let diff_style = scrollbar_theme.git.clone();
1153 for hunk in layout
1154 .position_map
1155 .snapshot
1156 .buffer_snapshot
1157 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1158 {
1159 let start_display = Point::new(hunk.buffer_range.start, 0)
1160 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1161 let end_display = Point::new(hunk.buffer_range.end, 0)
1162 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1163 let start_y = y_for_row(start_display.row() as f32);
1164 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1165 y_for_row((end_display.row() + 1) as f32)
1166 } else {
1167 y_for_row((end_display.row()) as f32)
1168 };
1169
1170 if end_y - start_y < 1. {
1171 end_y = start_y + 1.;
1172 }
1173 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1174
1175 let color = match hunk.status() {
1176 DiffHunkStatus::Added => diff_style.inserted,
1177 DiffHunkStatus::Modified => diff_style.modified,
1178 DiffHunkStatus::Removed => diff_style.deleted,
1179 };
1180
1181 let border = Border {
1182 width: 1.,
1183 color: style.thumb.border.color,
1184 overlay: false,
1185 top: false,
1186 right: true,
1187 bottom: false,
1188 left: true,
1189 };
1190
1191 scene.push_quad(Quad {
1192 bounds,
1193 background: Some(color),
1194 border,
1195 corner_radius: style.thumb.corner_radius,
1196 })
1197 }
1198 }
1199
1200 scene.push_quad(Quad {
1201 bounds: thumb_bounds,
1202 border: style.thumb.border,
1203 background: style.thumb.background_color,
1204 corner_radius: style.thumb.corner_radius,
1205 });
1206 }
1207
1208 scene.push_cursor_region(CursorRegion {
1209 bounds: track_bounds,
1210 style: CursorStyle::Arrow,
1211 });
1212 scene.push_mouse_region(
1213 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1214 .on_move(move |event, editor: &mut Editor, cx| {
1215 if event.pressed_button.is_none() {
1216 editor.scroll_manager.show_scrollbar(cx);
1217 }
1218 })
1219 .on_down(MouseButton::Left, {
1220 let row_range = row_range.clone();
1221 move |event, editor: &mut Editor, cx| {
1222 let y = event.position.y();
1223 if y < thumb_top || thumb_bottom < y {
1224 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1225 let top_row = center_row
1226 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1227 let mut position = editor.scroll_position(cx);
1228 position.set_y(top_row as f32);
1229 editor.set_scroll_position(position, cx);
1230 } else {
1231 editor.scroll_manager.show_scrollbar(cx);
1232 }
1233 }
1234 })
1235 .on_drag(MouseButton::Left, {
1236 move |event, editor: &mut Editor, cx| {
1237 if event.end {
1238 return;
1239 }
1240
1241 let y = event.prev_mouse_position.y();
1242 let new_y = event.position.y();
1243 if thumb_top < y && y < thumb_bottom {
1244 let mut position = editor.scroll_position(cx);
1245 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1246 if position.y() < 0.0 {
1247 position.set_y(0.);
1248 }
1249 editor.set_scroll_position(position, cx);
1250 }
1251 }
1252 }),
1253 );
1254 }
1255
1256 #[allow(clippy::too_many_arguments)]
1257 fn paint_highlighted_range(
1258 &self,
1259 scene: &mut SceneBuilder,
1260 range: Range<DisplayPoint>,
1261 color: Color,
1262 corner_radius: f32,
1263 line_end_overshoot: f32,
1264 layout: &LayoutState,
1265 content_origin: Vector2F,
1266 scroll_top: f32,
1267 scroll_left: f32,
1268 bounds: RectF,
1269 ) {
1270 let start_row = layout.visible_display_row_range.start;
1271 let end_row = layout.visible_display_row_range.end;
1272 if range.start != range.end {
1273 let row_range = if range.end.column() == 0 {
1274 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1275 } else {
1276 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1277 };
1278
1279 let highlighted_range = HighlightedRange {
1280 color,
1281 line_height: layout.position_map.line_height,
1282 corner_radius,
1283 start_y: content_origin.y()
1284 + row_range.start as f32 * layout.position_map.line_height
1285 - scroll_top,
1286 lines: row_range
1287 .into_iter()
1288 .map(|row| {
1289 let line_layout =
1290 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1291 HighlightedRangeLine {
1292 start_x: if row == range.start.row() {
1293 content_origin.x()
1294 + line_layout.x_for_index(range.start.column() as usize)
1295 - scroll_left
1296 } else {
1297 content_origin.x() - scroll_left
1298 },
1299 end_x: if row == range.end.row() {
1300 content_origin.x()
1301 + line_layout.x_for_index(range.end.column() as usize)
1302 - scroll_left
1303 } else {
1304 content_origin.x() + line_layout.width() + line_end_overshoot
1305 - scroll_left
1306 },
1307 }
1308 })
1309 .collect(),
1310 };
1311
1312 highlighted_range.paint(bounds, scene);
1313 }
1314 }
1315
1316 fn paint_blocks(
1317 &mut self,
1318 scene: &mut SceneBuilder,
1319 bounds: RectF,
1320 visible_bounds: RectF,
1321 layout: &mut LayoutState,
1322 editor: &mut Editor,
1323 cx: &mut ViewContext<Editor>,
1324 ) {
1325 let scroll_position = layout.position_map.snapshot.scroll_position();
1326 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1327 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1328
1329 for block in &mut layout.blocks {
1330 let mut origin = bounds.origin()
1331 + vec2f(
1332 0.,
1333 block.row as f32 * layout.position_map.line_height - scroll_top,
1334 );
1335 if !matches!(block.style, BlockStyle::Sticky) {
1336 origin += vec2f(-scroll_left, 0.);
1337 }
1338 block
1339 .element
1340 .paint(scene, origin, visible_bounds, editor, cx);
1341 }
1342 }
1343
1344 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1345 let style = &self.style;
1346
1347 cx.text_layout_cache()
1348 .layout_str(
1349 " ".repeat(column).as_str(),
1350 style.text.font_size,
1351 &[(
1352 column,
1353 RunStyle {
1354 font_id: style.text.font_id,
1355 color: Color::black(),
1356 underline: Default::default(),
1357 },
1358 )],
1359 )
1360 .width()
1361 }
1362
1363 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1364 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1365 self.column_pixels(digit_count, cx)
1366 }
1367
1368 //Folds contained in a hunk are ignored apart from shrinking visual size
1369 //If a fold contains any hunks then that fold line is marked as modified
1370 fn layout_git_gutters(
1371 &self,
1372 display_rows: Range<u32>,
1373 snapshot: &EditorSnapshot,
1374 ) -> Vec<DisplayDiffHunk> {
1375 let buffer_snapshot = &snapshot.buffer_snapshot;
1376
1377 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1378 .to_point(snapshot)
1379 .row;
1380 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1381 .to_point(snapshot)
1382 .row;
1383
1384 buffer_snapshot
1385 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1386 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1387 .dedup()
1388 .collect()
1389 }
1390
1391 fn layout_line_numbers(
1392 &self,
1393 rows: Range<u32>,
1394 active_rows: &BTreeMap<u32, bool>,
1395 is_singleton: bool,
1396 snapshot: &EditorSnapshot,
1397 cx: &ViewContext<Editor>,
1398 ) -> (
1399 Vec<Option<text_layout::Line>>,
1400 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1401 ) {
1402 let style = &self.style;
1403 let include_line_numbers = snapshot.mode == EditorMode::Full;
1404 let mut line_number_layouts = Vec::with_capacity(rows.len());
1405 let mut fold_statuses = Vec::with_capacity(rows.len());
1406 let mut line_number = String::new();
1407 for (ix, row) in snapshot
1408 .buffer_rows(rows.start)
1409 .take((rows.end - rows.start) as usize)
1410 .enumerate()
1411 {
1412 let display_row = rows.start + ix as u32;
1413 let (active, color) = if active_rows.contains_key(&display_row) {
1414 (true, style.line_number_active)
1415 } else {
1416 (false, style.line_number)
1417 };
1418 if let Some(buffer_row) = row {
1419 if include_line_numbers {
1420 line_number.clear();
1421 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1422 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1423 &line_number,
1424 style.text.font_size,
1425 &[(
1426 line_number.len(),
1427 RunStyle {
1428 font_id: style.text.font_id,
1429 color,
1430 underline: Default::default(),
1431 },
1432 )],
1433 )));
1434 fold_statuses.push(
1435 is_singleton
1436 .then(|| {
1437 snapshot
1438 .fold_for_line(buffer_row)
1439 .map(|fold_status| (fold_status, buffer_row, active))
1440 })
1441 .flatten(),
1442 )
1443 }
1444 } else {
1445 fold_statuses.push(None);
1446 line_number_layouts.push(None);
1447 }
1448 }
1449
1450 (line_number_layouts, fold_statuses)
1451 }
1452
1453 fn layout_lines(
1454 &mut self,
1455 rows: Range<u32>,
1456 line_number_layouts: &[Option<Line>],
1457 snapshot: &EditorSnapshot,
1458 cx: &ViewContext<Editor>,
1459 ) -> Vec<LineWithInvisibles> {
1460 if rows.start >= rows.end {
1461 return Vec::new();
1462 }
1463
1464 // When the editor is empty and unfocused, then show the placeholder.
1465 if snapshot.is_empty() {
1466 let placeholder_style = self
1467 .style
1468 .placeholder_text
1469 .as_ref()
1470 .unwrap_or(&self.style.text);
1471 let placeholder_text = snapshot.placeholder_text();
1472 let placeholder_lines = placeholder_text
1473 .as_ref()
1474 .map_or("", AsRef::as_ref)
1475 .split('\n')
1476 .skip(rows.start as usize)
1477 .chain(iter::repeat(""))
1478 .take(rows.len());
1479 placeholder_lines
1480 .map(|line| {
1481 cx.text_layout_cache().layout_str(
1482 line,
1483 placeholder_style.font_size,
1484 &[(
1485 line.len(),
1486 RunStyle {
1487 font_id: placeholder_style.font_id,
1488 color: placeholder_style.color,
1489 underline: Default::default(),
1490 },
1491 )],
1492 )
1493 })
1494 .map(|line| LineWithInvisibles {
1495 line,
1496 invisibles: Vec::new(),
1497 })
1498 .collect()
1499 } else {
1500 let style = &self.style;
1501 let chunks = snapshot
1502 .chunks(
1503 rows.clone(),
1504 true,
1505 Some(style.theme.hint),
1506 Some(style.theme.suggestion),
1507 )
1508 .map(|chunk| {
1509 let mut highlight_style = chunk
1510 .syntax_highlight_id
1511 .and_then(|id| id.style(&style.syntax));
1512
1513 if let Some(chunk_highlight) = chunk.highlight_style {
1514 if let Some(highlight_style) = highlight_style.as_mut() {
1515 highlight_style.highlight(chunk_highlight);
1516 } else {
1517 highlight_style = Some(chunk_highlight);
1518 }
1519 }
1520
1521 let mut diagnostic_highlight = HighlightStyle::default();
1522
1523 if chunk.is_unnecessary {
1524 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1525 }
1526
1527 if let Some(severity) = chunk.diagnostic_severity {
1528 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1529 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1530 let diagnostic_style = super::diagnostic_style(severity, true, style);
1531 diagnostic_highlight.underline = Some(Underline {
1532 color: Some(diagnostic_style.message.text.color),
1533 thickness: 1.0.into(),
1534 squiggly: true,
1535 });
1536 }
1537 }
1538
1539 if let Some(highlight_style) = highlight_style.as_mut() {
1540 highlight_style.highlight(diagnostic_highlight);
1541 } else {
1542 highlight_style = Some(diagnostic_highlight);
1543 }
1544
1545 HighlightedChunk {
1546 chunk: chunk.text,
1547 style: highlight_style,
1548 is_tab: chunk.is_tab,
1549 }
1550 });
1551
1552 LineWithInvisibles::from_chunks(
1553 chunks,
1554 &style.text,
1555 cx.text_layout_cache(),
1556 cx.font_cache(),
1557 MAX_LINE_LEN,
1558 rows.len() as usize,
1559 line_number_layouts,
1560 snapshot.mode,
1561 )
1562 }
1563 }
1564
1565 #[allow(clippy::too_many_arguments)]
1566 fn layout_blocks(
1567 &mut self,
1568 rows: Range<u32>,
1569 snapshot: &EditorSnapshot,
1570 editor_width: f32,
1571 scroll_width: f32,
1572 gutter_padding: f32,
1573 gutter_width: f32,
1574 em_width: f32,
1575 text_x: f32,
1576 line_height: f32,
1577 style: &EditorStyle,
1578 line_layouts: &[LineWithInvisibles],
1579 editor: &mut Editor,
1580 cx: &mut LayoutContext<Editor>,
1581 ) -> (f32, Vec<BlockLayout>) {
1582 let mut block_id = 0;
1583 let scroll_x = snapshot.scroll_anchor.offset.x();
1584 let (fixed_blocks, non_fixed_blocks) = snapshot
1585 .blocks_in_range(rows.clone())
1586 .partition::<Vec<_>, _>(|(_, block)| match block {
1587 TransformBlock::ExcerptHeader { .. } => false,
1588 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1589 });
1590 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1591 let mut element = match block {
1592 TransformBlock::Custom(block) => {
1593 let align_to = block
1594 .position()
1595 .to_point(&snapshot.buffer_snapshot)
1596 .to_display_point(snapshot);
1597 let anchor_x = text_x
1598 + if rows.contains(&align_to.row()) {
1599 line_layouts[(align_to.row() - rows.start) as usize]
1600 .line
1601 .x_for_index(align_to.column() as usize)
1602 } else {
1603 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1604 .x_for_index(align_to.column() as usize)
1605 };
1606
1607 block.render(&mut BlockContext {
1608 view_context: cx,
1609 anchor_x,
1610 gutter_padding,
1611 line_height,
1612 scroll_x,
1613 gutter_width,
1614 em_width,
1615 block_id,
1616 })
1617 }
1618 TransformBlock::ExcerptHeader {
1619 id,
1620 buffer,
1621 range,
1622 starts_new_buffer,
1623 ..
1624 } => {
1625 let tooltip_style = theme::current(cx).tooltip.clone();
1626 let include_root = editor
1627 .project
1628 .as_ref()
1629 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1630 .unwrap_or_default();
1631 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1632 let jump_path = ProjectPath {
1633 worktree_id: file.worktree_id(cx),
1634 path: file.path.clone(),
1635 };
1636 let jump_anchor = range
1637 .primary
1638 .as_ref()
1639 .map_or(range.context.start, |primary| primary.start);
1640 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1641
1642 enum JumpIcon {}
1643 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1644 let style = style.jump_icon.style_for(state);
1645 Svg::new("icons/arrow_up_right_8.svg")
1646 .with_color(style.color)
1647 .constrained()
1648 .with_width(style.icon_width)
1649 .aligned()
1650 .contained()
1651 .with_style(style.container)
1652 .constrained()
1653 .with_width(style.button_width)
1654 .with_height(style.button_width)
1655 })
1656 .with_cursor_style(CursorStyle::PointingHand)
1657 .on_click(MouseButton::Left, move |_, editor, cx| {
1658 if let Some(workspace) = editor
1659 .workspace
1660 .as_ref()
1661 .and_then(|(workspace, _)| workspace.upgrade(cx))
1662 {
1663 workspace.update(cx, |workspace, cx| {
1664 Editor::jump(
1665 workspace,
1666 jump_path.clone(),
1667 jump_position,
1668 jump_anchor,
1669 cx,
1670 );
1671 });
1672 }
1673 })
1674 .with_tooltip::<JumpIcon>(
1675 (*id).into(),
1676 "Jump to Buffer".to_string(),
1677 Some(Box::new(crate::OpenExcerpts)),
1678 tooltip_style.clone(),
1679 cx,
1680 )
1681 .aligned()
1682 .flex_float()
1683 });
1684
1685 if *starts_new_buffer {
1686 let editor_font_size = style.text.font_size;
1687 let style = &style.diagnostic_path_header;
1688 let font_size = (style.text_scale_factor * editor_font_size).round();
1689
1690 let path = buffer.resolve_file_path(cx, include_root);
1691 let mut filename = None;
1692 let mut parent_path = None;
1693 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1694 if let Some(path) = path {
1695 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1696 parent_path =
1697 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1698 }
1699
1700 Flex::row()
1701 .with_child(
1702 Label::new(
1703 filename.unwrap_or_else(|| "untitled".to_string()),
1704 style.filename.text.clone().with_font_size(font_size),
1705 )
1706 .contained()
1707 .with_style(style.filename.container)
1708 .aligned(),
1709 )
1710 .with_children(parent_path.map(|path| {
1711 Label::new(path, style.path.text.clone().with_font_size(font_size))
1712 .contained()
1713 .with_style(style.path.container)
1714 .aligned()
1715 }))
1716 .with_children(jump_icon)
1717 .contained()
1718 .with_style(style.container)
1719 .with_padding_left(gutter_padding)
1720 .with_padding_right(gutter_padding)
1721 .expanded()
1722 .into_any_named("path header block")
1723 } else {
1724 let text_style = style.text.clone();
1725 Flex::row()
1726 .with_child(Label::new("⋯", text_style))
1727 .with_children(jump_icon)
1728 .contained()
1729 .with_padding_left(gutter_padding)
1730 .with_padding_right(gutter_padding)
1731 .expanded()
1732 .into_any_named("collapsed context")
1733 }
1734 }
1735 };
1736
1737 element.layout(
1738 SizeConstraint {
1739 min: Vector2F::zero(),
1740 max: vec2f(width, block.height() as f32 * line_height),
1741 },
1742 editor,
1743 cx,
1744 );
1745 element
1746 };
1747
1748 let mut fixed_block_max_width = 0f32;
1749 let mut blocks = Vec::new();
1750 for (row, block) in fixed_blocks {
1751 let element = render_block(block, f32::INFINITY, block_id);
1752 block_id += 1;
1753 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1754 blocks.push(BlockLayout {
1755 row,
1756 element,
1757 style: BlockStyle::Fixed,
1758 });
1759 }
1760 for (row, block) in non_fixed_blocks {
1761 let style = match block {
1762 TransformBlock::Custom(block) => block.style(),
1763 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1764 };
1765 let width = match style {
1766 BlockStyle::Sticky => editor_width,
1767 BlockStyle::Flex => editor_width
1768 .max(fixed_block_max_width)
1769 .max(gutter_width + scroll_width),
1770 BlockStyle::Fixed => unreachable!(),
1771 };
1772 let element = render_block(block, width, block_id);
1773 block_id += 1;
1774 blocks.push(BlockLayout {
1775 row,
1776 element,
1777 style,
1778 });
1779 }
1780 (
1781 scroll_width.max(fixed_block_max_width - gutter_width),
1782 blocks,
1783 )
1784 }
1785}
1786
1787struct HighlightedChunk<'a> {
1788 chunk: &'a str,
1789 style: Option<HighlightStyle>,
1790 is_tab: bool,
1791}
1792
1793#[derive(Debug)]
1794pub struct LineWithInvisibles {
1795 pub line: Line,
1796 invisibles: Vec<Invisible>,
1797}
1798
1799impl LineWithInvisibles {
1800 fn from_chunks<'a>(
1801 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1802 text_style: &TextStyle,
1803 text_layout_cache: &TextLayoutCache,
1804 font_cache: &Arc<FontCache>,
1805 max_line_len: usize,
1806 max_line_count: usize,
1807 line_number_layouts: &[Option<Line>],
1808 editor_mode: EditorMode,
1809 ) -> Vec<Self> {
1810 let mut layouts = Vec::with_capacity(max_line_count);
1811 let mut line = String::new();
1812 let mut invisibles = Vec::new();
1813 let mut styles = Vec::new();
1814 let mut non_whitespace_added = false;
1815 let mut row = 0;
1816 let mut line_exceeded_max_len = false;
1817 for highlighted_chunk in chunks.chain([HighlightedChunk {
1818 chunk: "\n",
1819 style: None,
1820 is_tab: false,
1821 }]) {
1822 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1823 if ix > 0 {
1824 layouts.push(Self {
1825 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1826 invisibles: invisibles.drain(..).collect(),
1827 });
1828
1829 line.clear();
1830 styles.clear();
1831 row += 1;
1832 line_exceeded_max_len = false;
1833 non_whitespace_added = false;
1834 if row == max_line_count {
1835 return layouts;
1836 }
1837 }
1838
1839 if !line_chunk.is_empty() && !line_exceeded_max_len {
1840 let text_style = if let Some(style) = highlighted_chunk.style {
1841 text_style
1842 .clone()
1843 .highlight(style, font_cache)
1844 .map(Cow::Owned)
1845 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1846 } else {
1847 Cow::Borrowed(text_style)
1848 };
1849
1850 if line.len() + line_chunk.len() > max_line_len {
1851 let mut chunk_len = max_line_len - line.len();
1852 while !line_chunk.is_char_boundary(chunk_len) {
1853 chunk_len -= 1;
1854 }
1855 line_chunk = &line_chunk[..chunk_len];
1856 line_exceeded_max_len = true;
1857 }
1858
1859 styles.push((
1860 line_chunk.len(),
1861 RunStyle {
1862 font_id: text_style.font_id,
1863 color: text_style.color,
1864 underline: text_style.underline,
1865 },
1866 ));
1867
1868 if editor_mode == EditorMode::Full {
1869 // Line wrap pads its contents with fake whitespaces,
1870 // avoid printing them
1871 let inside_wrapped_string = line_number_layouts
1872 .get(row)
1873 .and_then(|layout| layout.as_ref())
1874 .is_none();
1875 if highlighted_chunk.is_tab {
1876 if non_whitespace_added || !inside_wrapped_string {
1877 invisibles.push(Invisible::Tab {
1878 line_start_offset: line.len(),
1879 });
1880 }
1881 } else {
1882 invisibles.extend(
1883 line_chunk
1884 .chars()
1885 .enumerate()
1886 .filter(|(_, line_char)| {
1887 let is_whitespace = line_char.is_whitespace();
1888 non_whitespace_added |= !is_whitespace;
1889 is_whitespace
1890 && (non_whitespace_added || !inside_wrapped_string)
1891 })
1892 .map(|(whitespace_index, _)| Invisible::Whitespace {
1893 line_offset: line.len() + whitespace_index,
1894 }),
1895 )
1896 }
1897 }
1898
1899 line.push_str(line_chunk);
1900 }
1901 }
1902 }
1903
1904 layouts
1905 }
1906
1907 fn draw(
1908 &self,
1909 layout: &LayoutState,
1910 row: u32,
1911 scroll_top: f32,
1912 scene: &mut SceneBuilder,
1913 content_origin: Vector2F,
1914 scroll_left: f32,
1915 visible_text_bounds: RectF,
1916 whitespace_setting: ShowWhitespaceSetting,
1917 selection_ranges: &[Range<DisplayPoint>],
1918 visible_bounds: RectF,
1919 cx: &mut ViewContext<Editor>,
1920 ) {
1921 let line_height = layout.position_map.line_height;
1922 let line_y = row as f32 * line_height - scroll_top;
1923
1924 self.line.paint(
1925 scene,
1926 content_origin + vec2f(-scroll_left, line_y),
1927 visible_text_bounds,
1928 line_height,
1929 cx,
1930 );
1931
1932 self.draw_invisibles(
1933 &selection_ranges,
1934 layout,
1935 content_origin,
1936 scroll_left,
1937 line_y,
1938 row,
1939 scene,
1940 visible_bounds,
1941 line_height,
1942 whitespace_setting,
1943 cx,
1944 );
1945 }
1946
1947 fn draw_invisibles(
1948 &self,
1949 selection_ranges: &[Range<DisplayPoint>],
1950 layout: &LayoutState,
1951 content_origin: Vector2F,
1952 scroll_left: f32,
1953 line_y: f32,
1954 row: u32,
1955 scene: &mut SceneBuilder,
1956 visible_bounds: RectF,
1957 line_height: f32,
1958 whitespace_setting: ShowWhitespaceSetting,
1959 cx: &mut ViewContext<Editor>,
1960 ) {
1961 let allowed_invisibles_regions = match whitespace_setting {
1962 ShowWhitespaceSetting::None => return,
1963 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1964 ShowWhitespaceSetting::All => None,
1965 };
1966
1967 for invisible in &self.invisibles {
1968 let (&token_offset, invisible_symbol) = match invisible {
1969 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1970 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1971 };
1972
1973 let x_offset = self.line.x_for_index(token_offset);
1974 let invisible_offset =
1975 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1976 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1977
1978 if let Some(allowed_regions) = allowed_invisibles_regions {
1979 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1980 if !allowed_regions
1981 .iter()
1982 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1983 {
1984 continue;
1985 }
1986 }
1987 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1988 }
1989 }
1990}
1991
1992#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1993enum Invisible {
1994 Tab { line_start_offset: usize },
1995 Whitespace { line_offset: usize },
1996}
1997
1998impl Element<Editor> for EditorElement {
1999 type LayoutState = LayoutState;
2000 type PaintState = ();
2001
2002 fn layout(
2003 &mut self,
2004 constraint: SizeConstraint,
2005 editor: &mut Editor,
2006 cx: &mut LayoutContext<Editor>,
2007 ) -> (Vector2F, Self::LayoutState) {
2008 let mut size = constraint.max;
2009 if size.x().is_infinite() {
2010 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2011 }
2012
2013 let snapshot = editor.snapshot(cx);
2014 let style = self.style.clone();
2015
2016 let line_height = (style.text.font_size * style.line_height_scalar).round();
2017
2018 let gutter_padding;
2019 let gutter_width;
2020 let gutter_margin;
2021 if snapshot.show_gutter {
2022 let em_width = style.text.em_width(cx.font_cache());
2023 gutter_padding = (em_width * style.gutter_padding_factor).round();
2024 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2025 gutter_margin = -style.text.descent(cx.font_cache());
2026 } else {
2027 gutter_padding = 0.0;
2028 gutter_width = 0.0;
2029 gutter_margin = 0.0;
2030 };
2031
2032 let text_width = size.x() - gutter_width;
2033 let em_width = style.text.em_width(cx.font_cache());
2034 let em_advance = style.text.em_advance(cx.font_cache());
2035 let overscroll = vec2f(em_width, 0.);
2036 let snapshot = {
2037 editor.set_visible_line_count(size.y() / line_height, cx);
2038
2039 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2040 let wrap_width = match editor.soft_wrap_mode(cx) {
2041 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2042 SoftWrap::EditorWidth => editor_width,
2043 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2044 };
2045
2046 if editor.set_wrap_width(Some(wrap_width), cx) {
2047 editor.snapshot(cx)
2048 } else {
2049 snapshot
2050 }
2051 };
2052
2053 let wrap_guides = editor
2054 .wrap_guides(cx)
2055 .iter()
2056 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2057 .collect();
2058
2059 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2060 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2061 size.set_y(
2062 scroll_height
2063 .min(constraint.max_along(Axis::Vertical))
2064 .max(constraint.min_along(Axis::Vertical))
2065 .min(line_height * max_lines as f32),
2066 )
2067 } else if let EditorMode::SingleLine = snapshot.mode {
2068 size.set_y(
2069 line_height
2070 .min(constraint.max_along(Axis::Vertical))
2071 .max(constraint.min_along(Axis::Vertical)),
2072 )
2073 } else if size.y().is_infinite() {
2074 size.set_y(scroll_height);
2075 }
2076 let gutter_size = vec2f(gutter_width, size.y());
2077 let text_size = vec2f(text_width, size.y());
2078
2079 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2080 let mut snapshot = editor.snapshot(cx);
2081
2082 let scroll_position = snapshot.scroll_position();
2083 // The scroll position is a fractional point, the whole number of which represents
2084 // the top of the window in terms of display rows.
2085 let start_row = scroll_position.y() as u32;
2086 let height_in_lines = size.y() / line_height;
2087 let max_row = snapshot.max_point().row();
2088
2089 // Add 1 to ensure selections bleed off screen
2090 let end_row = 1 + cmp::min(
2091 (scroll_position.y() + height_in_lines).ceil() as u32,
2092 max_row,
2093 );
2094
2095 let start_anchor = if start_row == 0 {
2096 Anchor::min()
2097 } else {
2098 snapshot
2099 .buffer_snapshot
2100 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2101 };
2102 let end_anchor = if end_row > max_row {
2103 Anchor::max()
2104 } else {
2105 snapshot
2106 .buffer_snapshot
2107 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2108 };
2109
2110 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2111 let mut active_rows = BTreeMap::new();
2112 let mut fold_ranges = Vec::new();
2113 let is_singleton = editor.is_singleton(cx);
2114
2115 let highlighted_rows = editor.highlighted_rows();
2116 let theme = theme::current(cx);
2117 let highlighted_ranges = editor.background_highlights_in_range(
2118 start_anchor..end_anchor,
2119 &snapshot.display_snapshot,
2120 theme.as_ref(),
2121 );
2122
2123 fold_ranges.extend(
2124 snapshot
2125 .folds_in_range(start_anchor..end_anchor)
2126 .map(|anchor| {
2127 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2128 (
2129 start.row,
2130 start.to_display_point(&snapshot.display_snapshot)
2131 ..anchor.end.to_display_point(&snapshot),
2132 )
2133 }),
2134 );
2135
2136 let mut remote_selections = HashMap::default();
2137 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2138 .buffer_snapshot
2139 .remote_selections_in_range(&(start_anchor..end_anchor))
2140 {
2141 // The local selections match the leader's selections.
2142 if Some(replica_id) == editor.leader_replica_id {
2143 continue;
2144 }
2145 remote_selections
2146 .entry(replica_id)
2147 .or_insert(Vec::new())
2148 .push(SelectionLayout::new(
2149 selection,
2150 line_mode,
2151 cursor_shape,
2152 &snapshot.display_snapshot,
2153 false,
2154 ));
2155 }
2156 selections.extend(remote_selections);
2157
2158 if editor.show_local_selections {
2159 let mut local_selections = editor
2160 .selections
2161 .disjoint_in_range(start_anchor..end_anchor, cx);
2162 local_selections.extend(editor.selections.pending(cx));
2163 let newest = editor.selections.newest(cx);
2164 for selection in &local_selections {
2165 let is_empty = selection.start == selection.end;
2166 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2167 let selection_end = snapshot.next_line_boundary(selection.end).1;
2168 for row in cmp::max(selection_start.row(), start_row)
2169 ..=cmp::min(selection_end.row(), end_row)
2170 {
2171 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2172 *contains_non_empty_selection |= !is_empty;
2173 }
2174 }
2175
2176 // Render the local selections in the leader's color when following.
2177 let local_replica_id = editor
2178 .leader_replica_id
2179 .unwrap_or_else(|| editor.replica_id(cx));
2180
2181 selections.push((
2182 local_replica_id,
2183 local_selections
2184 .into_iter()
2185 .map(|selection| {
2186 let is_newest = selection == newest;
2187 SelectionLayout::new(
2188 selection,
2189 editor.selections.line_mode,
2190 editor.cursor_shape,
2191 &snapshot.display_snapshot,
2192 is_newest,
2193 )
2194 })
2195 .collect(),
2196 ));
2197 }
2198
2199 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2200 let show_scrollbars = match scrollbar_settings.show {
2201 ShowScrollbar::Auto => {
2202 // Git
2203 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2204 ||
2205 // Selections
2206 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2207 // Scrollmanager
2208 || editor.scroll_manager.scrollbars_visible()
2209 }
2210 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2211 ShowScrollbar::Always => true,
2212 ShowScrollbar::Never => false,
2213 };
2214
2215 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2216 .into_iter()
2217 .map(|(id, fold)| {
2218 let color = self
2219 .style
2220 .folds
2221 .ellipses
2222 .background
2223 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2224 .color;
2225
2226 (id, fold, color)
2227 })
2228 .collect();
2229
2230 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2231 start_row..end_row,
2232 &active_rows,
2233 is_singleton,
2234 &snapshot,
2235 cx,
2236 );
2237
2238 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2239
2240 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2241
2242 let mut max_visible_line_width = 0.0;
2243 let line_layouts =
2244 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2245 for line_with_invisibles in &line_layouts {
2246 if line_with_invisibles.line.width() > max_visible_line_width {
2247 max_visible_line_width = line_with_invisibles.line.width();
2248 }
2249 }
2250
2251 let style = self.style.clone();
2252 let longest_line_width = layout_line(
2253 snapshot.longest_row(),
2254 &snapshot,
2255 &style,
2256 cx.text_layout_cache(),
2257 )
2258 .width();
2259 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2260 let em_width = style.text.em_width(cx.font_cache());
2261 let (scroll_width, blocks) = self.layout_blocks(
2262 start_row..end_row,
2263 &snapshot,
2264 size.x(),
2265 scroll_width,
2266 gutter_padding,
2267 gutter_width,
2268 em_width,
2269 gutter_width + gutter_margin,
2270 line_height,
2271 &style,
2272 &line_layouts,
2273 editor,
2274 cx,
2275 );
2276
2277 let scroll_max = vec2f(
2278 ((scroll_width - text_size.x()) / em_width).max(0.0),
2279 max_row as f32,
2280 );
2281
2282 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2283
2284 let autoscrolled = if autoscroll_horizontally {
2285 editor.autoscroll_horizontally(
2286 start_row,
2287 text_size.x(),
2288 scroll_width,
2289 em_width,
2290 &line_layouts,
2291 cx,
2292 )
2293 } else {
2294 false
2295 };
2296
2297 if clamped || autoscrolled {
2298 snapshot = editor.snapshot(cx);
2299 }
2300
2301 let newest_selection_head = editor
2302 .selections
2303 .newest::<usize>(cx)
2304 .head()
2305 .to_display_point(&snapshot);
2306 let style = editor.style(cx);
2307
2308 let mut context_menu = None;
2309 let mut code_actions_indicator = None;
2310 if (start_row..end_row).contains(&newest_selection_head.row()) {
2311 if editor.context_menu_visible() {
2312 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2313 }
2314
2315 let active = matches!(
2316 editor.context_menu,
2317 Some(crate::ContextMenu::CodeActions(_))
2318 );
2319
2320 code_actions_indicator = editor
2321 .render_code_actions_indicator(&style, active, cx)
2322 .map(|indicator| (newest_selection_head.row(), indicator));
2323 }
2324
2325 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2326 let mut hover = editor
2327 .hover_state
2328 .render(&snapshot, &style, visible_rows, cx);
2329 let mode = editor.mode;
2330
2331 let mut fold_indicators = editor.render_fold_indicators(
2332 fold_statuses,
2333 &style,
2334 editor.gutter_hovered,
2335 line_height,
2336 gutter_margin,
2337 cx,
2338 );
2339
2340 if let Some((_, context_menu)) = context_menu.as_mut() {
2341 context_menu.layout(
2342 SizeConstraint {
2343 min: Vector2F::zero(),
2344 max: vec2f(
2345 cx.window_size().x() * 0.7,
2346 (12. * line_height).min((size.y() - line_height) / 2.),
2347 ),
2348 },
2349 editor,
2350 cx,
2351 );
2352 }
2353
2354 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2355 indicator.layout(
2356 SizeConstraint::strict_along(
2357 Axis::Vertical,
2358 line_height * style.code_actions.vertical_scale,
2359 ),
2360 editor,
2361 cx,
2362 );
2363 }
2364
2365 for fold_indicator in fold_indicators.iter_mut() {
2366 if let Some(indicator) = fold_indicator.as_mut() {
2367 indicator.layout(
2368 SizeConstraint::strict_along(
2369 Axis::Vertical,
2370 line_height * style.code_actions.vertical_scale,
2371 ),
2372 editor,
2373 cx,
2374 );
2375 }
2376 }
2377
2378 if let Some((_, hover_popovers)) = hover.as_mut() {
2379 for hover_popover in hover_popovers.iter_mut() {
2380 hover_popover.layout(
2381 SizeConstraint {
2382 min: Vector2F::zero(),
2383 max: vec2f(
2384 (120. * em_width) // Default size
2385 .min(size.x() / 2.) // Shrink to half of the editor width
2386 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2387 (16. * line_height) // Default size
2388 .min(size.y() / 2.) // Shrink to half of the editor height
2389 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2390 ),
2391 },
2392 editor,
2393 cx,
2394 );
2395 }
2396 }
2397
2398 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2399 let invisible_symbol_style = RunStyle {
2400 color: self.style.whitespace,
2401 font_id: self.style.text.font_id,
2402 underline: Default::default(),
2403 };
2404
2405 (
2406 size,
2407 LayoutState {
2408 mode,
2409 position_map: Arc::new(PositionMap {
2410 size,
2411 scroll_max,
2412 line_layouts,
2413 line_height,
2414 em_width,
2415 em_advance,
2416 snapshot,
2417 }),
2418 visible_display_row_range: start_row..end_row,
2419 wrap_guides,
2420 gutter_size,
2421 gutter_padding,
2422 text_size,
2423 scrollbar_row_range,
2424 show_scrollbars,
2425 is_singleton,
2426 max_row,
2427 gutter_margin,
2428 active_rows,
2429 highlighted_rows,
2430 highlighted_ranges,
2431 fold_ranges,
2432 line_number_layouts,
2433 display_hunks,
2434 blocks,
2435 selections,
2436 context_menu,
2437 code_actions_indicator,
2438 fold_indicators,
2439 tab_invisible: cx.text_layout_cache().layout_str(
2440 "→",
2441 invisible_symbol_font_size,
2442 &[("→".len(), invisible_symbol_style)],
2443 ),
2444 space_invisible: cx.text_layout_cache().layout_str(
2445 "•",
2446 invisible_symbol_font_size,
2447 &[("•".len(), invisible_symbol_style)],
2448 ),
2449 hover_popovers: hover,
2450 },
2451 )
2452 }
2453
2454 fn paint(
2455 &mut self,
2456 scene: &mut SceneBuilder,
2457 bounds: RectF,
2458 visible_bounds: RectF,
2459 layout: &mut Self::LayoutState,
2460 editor: &mut Editor,
2461 cx: &mut ViewContext<Editor>,
2462 ) -> Self::PaintState {
2463 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2464 scene.push_layer(Some(visible_bounds));
2465
2466 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2467 let text_bounds = RectF::new(
2468 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2469 layout.text_size,
2470 );
2471
2472 Self::attach_mouse_handlers(
2473 scene,
2474 &layout.position_map,
2475 layout.hover_popovers.is_some(),
2476 visible_bounds,
2477 text_bounds,
2478 gutter_bounds,
2479 bounds,
2480 cx,
2481 );
2482
2483 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2484 if layout.gutter_size.x() > 0. {
2485 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2486 }
2487 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2488
2489 scene.push_layer(Some(bounds));
2490 if !layout.blocks.is_empty() {
2491 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2492 }
2493 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2494 scene.pop_layer();
2495
2496 scene.pop_layer();
2497 }
2498
2499 fn rect_for_text_range(
2500 &self,
2501 range_utf16: Range<usize>,
2502 bounds: RectF,
2503 _: RectF,
2504 layout: &Self::LayoutState,
2505 _: &Self::PaintState,
2506 _: &Editor,
2507 _: &ViewContext<Editor>,
2508 ) -> Option<RectF> {
2509 let text_bounds = RectF::new(
2510 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2511 layout.text_size,
2512 );
2513 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2514 let scroll_position = layout.position_map.snapshot.scroll_position();
2515 let start_row = scroll_position.y() as u32;
2516 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2517 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2518
2519 let range_start = OffsetUtf16(range_utf16.start)
2520 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2521 if range_start.row() < start_row {
2522 return None;
2523 }
2524
2525 let line = &layout
2526 .position_map
2527 .line_layouts
2528 .get((range_start.row() - start_row) as usize)?
2529 .line;
2530 let range_start_x = line.x_for_index(range_start.column() as usize);
2531 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2532 Some(RectF::new(
2533 content_origin
2534 + vec2f(
2535 range_start_x,
2536 range_start_y + layout.position_map.line_height,
2537 )
2538 - vec2f(scroll_left, scroll_top),
2539 vec2f(
2540 layout.position_map.em_width,
2541 layout.position_map.line_height,
2542 ),
2543 ))
2544 }
2545
2546 fn debug(
2547 &self,
2548 bounds: RectF,
2549 _: &Self::LayoutState,
2550 _: &Self::PaintState,
2551 _: &Editor,
2552 _: &ViewContext<Editor>,
2553 ) -> json::Value {
2554 json!({
2555 "type": "BufferElement",
2556 "bounds": bounds.to_json()
2557 })
2558 }
2559}
2560
2561type BufferRow = u32;
2562
2563pub struct LayoutState {
2564 position_map: Arc<PositionMap>,
2565 gutter_size: Vector2F,
2566 gutter_padding: f32,
2567 gutter_margin: f32,
2568 text_size: Vector2F,
2569 mode: EditorMode,
2570 wrap_guides: SmallVec<[(f32, bool); 2]>,
2571 visible_display_row_range: Range<u32>,
2572 active_rows: BTreeMap<u32, bool>,
2573 highlighted_rows: Option<Range<u32>>,
2574 line_number_layouts: Vec<Option<text_layout::Line>>,
2575 display_hunks: Vec<DisplayDiffHunk>,
2576 blocks: Vec<BlockLayout>,
2577 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2578 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2579 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2580 scrollbar_row_range: Range<f32>,
2581 show_scrollbars: bool,
2582 is_singleton: bool,
2583 max_row: u32,
2584 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2585 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2586 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2587 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2588 tab_invisible: Line,
2589 space_invisible: Line,
2590}
2591
2592struct PositionMap {
2593 size: Vector2F,
2594 line_height: f32,
2595 scroll_max: Vector2F,
2596 em_width: f32,
2597 em_advance: f32,
2598 line_layouts: Vec<LineWithInvisibles>,
2599 snapshot: EditorSnapshot,
2600}
2601
2602impl PositionMap {
2603 /// Returns two display points:
2604 /// 1. The nearest *valid* position in the editor
2605 /// 2. An unclipped, potentially *invalid* position that maps directly to
2606 /// the given pixel position.
2607 fn point_for_position(
2608 &self,
2609 text_bounds: RectF,
2610 position: Vector2F,
2611 ) -> (DisplayPoint, DisplayPoint) {
2612 let scroll_position = self.snapshot.scroll_position();
2613 let position = position - text_bounds.origin();
2614 let y = position.y().max(0.0).min(self.size.y());
2615 let x = position.x() + (scroll_position.x() * self.em_width);
2616 let row = (y / self.line_height + scroll_position.y()) as u32;
2617 let (column, x_overshoot) = if let Some(line) = self
2618 .line_layouts
2619 .get(row as usize - scroll_position.y() as usize)
2620 .map(|line_with_spaces| &line_with_spaces.line)
2621 {
2622 if let Some(ix) = line.index_for_x(x) {
2623 (ix as u32, 0.0)
2624 } else {
2625 (line.len() as u32, 0f32.max(x - line.width()))
2626 }
2627 } else {
2628 (0, x)
2629 };
2630
2631 let mut target_point = DisplayPoint::new(row, column);
2632 let point = self.snapshot.clip_point(target_point, Bias::Left);
2633 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2634
2635 (point, target_point)
2636 }
2637}
2638
2639struct BlockLayout {
2640 row: u32,
2641 element: AnyElement<Editor>,
2642 style: BlockStyle,
2643}
2644
2645fn layout_line(
2646 row: u32,
2647 snapshot: &EditorSnapshot,
2648 style: &EditorStyle,
2649 layout_cache: &TextLayoutCache,
2650) -> text_layout::Line {
2651 let mut line = snapshot.line(row);
2652
2653 if line.len() > MAX_LINE_LEN {
2654 let mut len = MAX_LINE_LEN;
2655 while !line.is_char_boundary(len) {
2656 len -= 1;
2657 }
2658
2659 line.truncate(len);
2660 }
2661
2662 layout_cache.layout_str(
2663 &line,
2664 style.text.font_size,
2665 &[(
2666 snapshot.line_len(row) as usize,
2667 RunStyle {
2668 font_id: style.text.font_id,
2669 color: Color::black(),
2670 underline: Default::default(),
2671 },
2672 )],
2673 )
2674}
2675
2676#[derive(Debug)]
2677pub struct Cursor {
2678 origin: Vector2F,
2679 block_width: f32,
2680 line_height: f32,
2681 color: Color,
2682 shape: CursorShape,
2683 block_text: Option<Line>,
2684}
2685
2686impl Cursor {
2687 pub fn new(
2688 origin: Vector2F,
2689 block_width: f32,
2690 line_height: f32,
2691 color: Color,
2692 shape: CursorShape,
2693 block_text: Option<Line>,
2694 ) -> Cursor {
2695 Cursor {
2696 origin,
2697 block_width,
2698 line_height,
2699 color,
2700 shape,
2701 block_text,
2702 }
2703 }
2704
2705 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2706 RectF::new(
2707 self.origin + origin,
2708 vec2f(self.block_width, self.line_height),
2709 )
2710 }
2711
2712 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2713 let bounds = match self.shape {
2714 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2715 CursorShape::Block | CursorShape::Hollow => RectF::new(
2716 self.origin + origin,
2717 vec2f(self.block_width, self.line_height),
2718 ),
2719 CursorShape::Underscore => RectF::new(
2720 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2721 vec2f(self.block_width, 2.0),
2722 ),
2723 };
2724
2725 //Draw background or border quad
2726 if matches!(self.shape, CursorShape::Hollow) {
2727 scene.push_quad(Quad {
2728 bounds,
2729 background: None,
2730 border: Border::all(1., self.color),
2731 corner_radius: 0.,
2732 });
2733 } else {
2734 scene.push_quad(Quad {
2735 bounds,
2736 background: Some(self.color),
2737 border: Default::default(),
2738 corner_radius: 0.,
2739 });
2740 }
2741
2742 if let Some(block_text) = &self.block_text {
2743 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2744 }
2745 }
2746
2747 pub fn shape(&self) -> CursorShape {
2748 self.shape
2749 }
2750}
2751
2752#[derive(Debug)]
2753pub struct HighlightedRange {
2754 pub start_y: f32,
2755 pub line_height: f32,
2756 pub lines: Vec<HighlightedRangeLine>,
2757 pub color: Color,
2758 pub corner_radius: f32,
2759}
2760
2761#[derive(Debug)]
2762pub struct HighlightedRangeLine {
2763 pub start_x: f32,
2764 pub end_x: f32,
2765}
2766
2767impl HighlightedRange {
2768 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2769 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2770 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2771 self.paint_lines(
2772 self.start_y + self.line_height,
2773 &self.lines[1..],
2774 bounds,
2775 scene,
2776 );
2777 } else {
2778 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2779 }
2780 }
2781
2782 fn paint_lines(
2783 &self,
2784 start_y: f32,
2785 lines: &[HighlightedRangeLine],
2786 bounds: RectF,
2787 scene: &mut SceneBuilder,
2788 ) {
2789 if lines.is_empty() {
2790 return;
2791 }
2792
2793 let mut path = PathBuilder::new();
2794 let first_line = lines.first().unwrap();
2795 let last_line = lines.last().unwrap();
2796
2797 let first_top_left = vec2f(first_line.start_x, start_y);
2798 let first_top_right = vec2f(first_line.end_x, start_y);
2799
2800 let curve_height = vec2f(0., self.corner_radius);
2801 let curve_width = |start_x: f32, end_x: f32| {
2802 let max = (end_x - start_x) / 2.;
2803 let width = if max < self.corner_radius {
2804 max
2805 } else {
2806 self.corner_radius
2807 };
2808
2809 vec2f(width, 0.)
2810 };
2811
2812 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2813 path.reset(first_top_right - top_curve_width);
2814 path.curve_to(first_top_right + curve_height, first_top_right);
2815
2816 let mut iter = lines.iter().enumerate().peekable();
2817 while let Some((ix, line)) = iter.next() {
2818 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2819
2820 if let Some((_, next_line)) = iter.peek() {
2821 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2822
2823 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2824 Ordering::Equal => {
2825 path.line_to(bottom_right);
2826 }
2827 Ordering::Less => {
2828 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2829 path.line_to(bottom_right - curve_height);
2830 if self.corner_radius > 0. {
2831 path.curve_to(bottom_right - curve_width, bottom_right);
2832 }
2833 path.line_to(next_top_right + curve_width);
2834 if self.corner_radius > 0. {
2835 path.curve_to(next_top_right + curve_height, next_top_right);
2836 }
2837 }
2838 Ordering::Greater => {
2839 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2840 path.line_to(bottom_right - curve_height);
2841 if self.corner_radius > 0. {
2842 path.curve_to(bottom_right + curve_width, bottom_right);
2843 }
2844 path.line_to(next_top_right - curve_width);
2845 if self.corner_radius > 0. {
2846 path.curve_to(next_top_right + curve_height, next_top_right);
2847 }
2848 }
2849 }
2850 } else {
2851 let curve_width = curve_width(line.start_x, line.end_x);
2852 path.line_to(bottom_right - curve_height);
2853 if self.corner_radius > 0. {
2854 path.curve_to(bottom_right - curve_width, bottom_right);
2855 }
2856
2857 let bottom_left = vec2f(line.start_x, bottom_right.y());
2858 path.line_to(bottom_left + curve_width);
2859 if self.corner_radius > 0. {
2860 path.curve_to(bottom_left - curve_height, bottom_left);
2861 }
2862 }
2863 }
2864
2865 if first_line.start_x > last_line.start_x {
2866 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2867 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2868 path.line_to(second_top_left + curve_height);
2869 if self.corner_radius > 0. {
2870 path.curve_to(second_top_left + curve_width, second_top_left);
2871 }
2872 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2873 path.line_to(first_bottom_left - curve_width);
2874 if self.corner_radius > 0. {
2875 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2876 }
2877 }
2878
2879 path.line_to(first_top_left + curve_height);
2880 if self.corner_radius > 0. {
2881 path.curve_to(first_top_left + top_curve_width, first_top_left);
2882 }
2883 path.line_to(first_top_right - top_curve_width);
2884
2885 scene.push_path(path.build(self.color, Some(bounds)));
2886 }
2887}
2888
2889fn position_to_display_point(
2890 position: Vector2F,
2891 text_bounds: RectF,
2892 position_map: &PositionMap,
2893) -> Option<DisplayPoint> {
2894 if text_bounds.contains_point(position) {
2895 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2896 if point == target_point {
2897 Some(point)
2898 } else {
2899 None
2900 }
2901 } else {
2902 None
2903 }
2904}
2905
2906fn range_to_bounds(
2907 range: &Range<DisplayPoint>,
2908 content_origin: Vector2F,
2909 scroll_left: f32,
2910 scroll_top: f32,
2911 visible_row_range: &Range<u32>,
2912 line_end_overshoot: f32,
2913 position_map: &PositionMap,
2914) -> impl Iterator<Item = RectF> {
2915 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2916
2917 if range.start == range.end {
2918 return bounds.into_iter();
2919 }
2920
2921 let start_row = visible_row_range.start;
2922 let end_row = visible_row_range.end;
2923
2924 let row_range = if range.end.column() == 0 {
2925 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2926 } else {
2927 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2928 };
2929
2930 let first_y =
2931 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2932
2933 for (idx, row) in row_range.enumerate() {
2934 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2935
2936 let start_x = if row == range.start.row() {
2937 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2938 - scroll_left
2939 } else {
2940 content_origin.x() - scroll_left
2941 };
2942
2943 let end_x = if row == range.end.row() {
2944 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2945 } else {
2946 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2947 };
2948
2949 bounds.push(RectF::from_points(
2950 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2951 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2952 ))
2953 }
2954
2955 bounds.into_iter()
2956}
2957
2958pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2959 delta.powf(1.5) / 100.0
2960}
2961
2962fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2963 delta.powf(1.2) / 300.0
2964}
2965
2966#[cfg(test)]
2967mod tests {
2968 use super::*;
2969 use crate::{
2970 display_map::{BlockDisposition, BlockProperties},
2971 editor_tests::{init_test, update_test_language_settings},
2972 Editor, MultiBuffer,
2973 };
2974 use gpui::TestAppContext;
2975 use language::language_settings;
2976 use log::info;
2977 use std::{num::NonZeroU32, sync::Arc};
2978 use util::test::sample_text;
2979
2980 #[gpui::test]
2981 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2982 init_test(cx, |_| {});
2983
2984 let editor = cx
2985 .add_window(|cx| {
2986 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2987 Editor::new(EditorMode::Full, buffer, None, None, cx)
2988 })
2989 .root(cx);
2990 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2991
2992 let layouts = editor.update(cx, |editor, cx| {
2993 let snapshot = editor.snapshot(cx);
2994 element
2995 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2996 .0
2997 });
2998 assert_eq!(layouts.len(), 6);
2999 }
3000
3001 #[gpui::test]
3002 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3003 init_test(cx, |_| {});
3004
3005 let editor = cx
3006 .add_window(|cx| {
3007 let buffer = MultiBuffer::build_simple("", cx);
3008 Editor::new(EditorMode::Full, buffer, None, None, cx)
3009 })
3010 .root(cx);
3011
3012 editor.update(cx, |editor, cx| {
3013 editor.set_placeholder_text("hello", cx);
3014 editor.insert_blocks(
3015 [BlockProperties {
3016 style: BlockStyle::Fixed,
3017 disposition: BlockDisposition::Above,
3018 height: 3,
3019 position: Anchor::min(),
3020 render: Arc::new(|_| Empty::new().into_any()),
3021 }],
3022 None,
3023 cx,
3024 );
3025
3026 // Blur the editor so that it displays placeholder text.
3027 cx.blur();
3028 });
3029
3030 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3031 let (size, mut state) = editor.update(cx, |editor, cx| {
3032 let mut new_parents = Default::default();
3033 let mut notify_views_if_parents_change = Default::default();
3034 let mut layout_cx = LayoutContext::new(
3035 cx,
3036 &mut new_parents,
3037 &mut notify_views_if_parents_change,
3038 false,
3039 );
3040 element.layout(
3041 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3042 editor,
3043 &mut layout_cx,
3044 )
3045 });
3046
3047 assert_eq!(state.position_map.line_layouts.len(), 4);
3048 assert_eq!(
3049 state
3050 .line_number_layouts
3051 .iter()
3052 .map(Option::is_some)
3053 .collect::<Vec<_>>(),
3054 &[false, false, false, true]
3055 );
3056
3057 // Don't panic.
3058 let mut scene = SceneBuilder::new(1.0);
3059 let bounds = RectF::new(Default::default(), size);
3060 editor.update(cx, |editor, cx| {
3061 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3062 });
3063 }
3064
3065 #[gpui::test]
3066 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3067 const TAB_SIZE: u32 = 4;
3068
3069 let input_text = "\t \t|\t| a b";
3070 let expected_invisibles = vec![
3071 Invisible::Tab {
3072 line_start_offset: 0,
3073 },
3074 Invisible::Whitespace {
3075 line_offset: TAB_SIZE as usize,
3076 },
3077 Invisible::Tab {
3078 line_start_offset: TAB_SIZE as usize + 1,
3079 },
3080 Invisible::Tab {
3081 line_start_offset: TAB_SIZE as usize * 2 + 1,
3082 },
3083 Invisible::Whitespace {
3084 line_offset: TAB_SIZE as usize * 3 + 1,
3085 },
3086 Invisible::Whitespace {
3087 line_offset: TAB_SIZE as usize * 3 + 3,
3088 },
3089 ];
3090 assert_eq!(
3091 expected_invisibles.len(),
3092 input_text
3093 .chars()
3094 .filter(|initial_char| initial_char.is_whitespace())
3095 .count(),
3096 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3097 );
3098
3099 init_test(cx, |s| {
3100 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3101 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3102 });
3103
3104 let actual_invisibles =
3105 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3106
3107 assert_eq!(expected_invisibles, actual_invisibles);
3108 }
3109
3110 #[gpui::test]
3111 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3112 init_test(cx, |s| {
3113 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3114 s.defaults.tab_size = NonZeroU32::new(4);
3115 });
3116
3117 for editor_mode_without_invisibles in [
3118 EditorMode::SingleLine,
3119 EditorMode::AutoHeight { max_lines: 100 },
3120 ] {
3121 let invisibles = collect_invisibles_from_new_editor(
3122 cx,
3123 editor_mode_without_invisibles,
3124 "\t\t\t| | a b",
3125 500.0,
3126 );
3127 assert!(invisibles.is_empty(),
3128 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3129 }
3130 }
3131
3132 #[gpui::test]
3133 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3134 let tab_size = 4;
3135 let input_text = "a\tbcd ".repeat(9);
3136 let repeated_invisibles = [
3137 Invisible::Tab {
3138 line_start_offset: 1,
3139 },
3140 Invisible::Whitespace {
3141 line_offset: tab_size as usize + 3,
3142 },
3143 Invisible::Whitespace {
3144 line_offset: tab_size as usize + 4,
3145 },
3146 Invisible::Whitespace {
3147 line_offset: tab_size as usize + 5,
3148 },
3149 ];
3150 let expected_invisibles = std::iter::once(repeated_invisibles)
3151 .cycle()
3152 .take(9)
3153 .flatten()
3154 .collect::<Vec<_>>();
3155 assert_eq!(
3156 expected_invisibles.len(),
3157 input_text
3158 .chars()
3159 .filter(|initial_char| initial_char.is_whitespace())
3160 .count(),
3161 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3162 );
3163 info!("Expected invisibles: {expected_invisibles:?}");
3164
3165 init_test(cx, |_| {});
3166
3167 // Put the same string with repeating whitespace pattern into editors of various size,
3168 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3169 let resize_step = 10.0;
3170 let mut editor_width = 200.0;
3171 while editor_width <= 1000.0 {
3172 update_test_language_settings(cx, |s| {
3173 s.defaults.tab_size = NonZeroU32::new(tab_size);
3174 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3175 s.defaults.preferred_line_length = Some(editor_width as u32);
3176 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3177 });
3178
3179 let actual_invisibles =
3180 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3181
3182 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3183 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3184 let mut i = 0;
3185 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3186 i = actual_index;
3187 match expected_invisibles.get(i) {
3188 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3189 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3190 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3191 _ => {
3192 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3193 }
3194 },
3195 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3196 }
3197 }
3198 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3199 assert!(
3200 missing_expected_invisibles.is_empty(),
3201 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3202 );
3203
3204 editor_width += resize_step;
3205 }
3206 }
3207
3208 fn collect_invisibles_from_new_editor(
3209 cx: &mut TestAppContext,
3210 editor_mode: EditorMode,
3211 input_text: &str,
3212 editor_width: f32,
3213 ) -> Vec<Invisible> {
3214 info!(
3215 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3216 );
3217 let editor = cx
3218 .add_window(|cx| {
3219 let buffer = MultiBuffer::build_simple(&input_text, cx);
3220 Editor::new(editor_mode, buffer, None, None, cx)
3221 })
3222 .root(cx);
3223
3224 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3225 let (_, layout_state) = editor.update(cx, |editor, cx| {
3226 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3227 editor.set_wrap_width(Some(editor_width), cx);
3228
3229 let mut new_parents = Default::default();
3230 let mut notify_views_if_parents_change = Default::default();
3231 let mut layout_cx = LayoutContext::new(
3232 cx,
3233 &mut new_parents,
3234 &mut notify_views_if_parents_change,
3235 false,
3236 );
3237 element.layout(
3238 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3239 editor,
3240 &mut layout_cx,
3241 )
3242 });
3243
3244 layout_state
3245 .position_map
3246 .line_layouts
3247 .iter()
3248 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3249 .flatten()
3250 .cloned()
3251 .collect()
3252 }
3253}