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 mut start_row = None;
1111 let mut end_row = None;
1112 let color = scrollbar_theme.selections;
1113 let border = Border {
1114 width: 1.,
1115 color: style.thumb.border.color,
1116 overlay: false,
1117 top: false,
1118 right: true,
1119 bottom: false,
1120 left: true,
1121 };
1122 let mut push_region = |start, end| {
1123 if let (Some(start_display), Some(end_display)) = (start, end) {
1124 let start_y = y_for_row(start_display as f32);
1125 let mut end_y = y_for_row(end_display as f32);
1126 if end_y - start_y < 1. {
1127 end_y = start_y + 1.;
1128 }
1129 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1130
1131 scene.push_quad(Quad {
1132 bounds,
1133 background: Some(color),
1134 border,
1135 corner_radius: style.thumb.corner_radius,
1136 })
1137 }
1138 };
1139 for (row, _) in &editor
1140 .background_highlights_in_range_for::<crate::items::BufferSearchHighlights>(
1141 start_anchor..end_anchor,
1142 &layout.position_map.snapshot,
1143 &theme,
1144 )
1145 {
1146 let start_display = row.start;
1147 let end_display = row.end;
1148
1149 if start_row.is_none() {
1150 assert_eq!(end_row, None);
1151 start_row = Some(start_display.row());
1152 end_row = Some(end_display.row());
1153 continue;
1154 }
1155 if let Some(current_end) = end_row.as_mut() {
1156 if start_display.row() > *current_end + 1 {
1157 push_region(start_row, end_row);
1158 start_row = Some(start_display.row());
1159 end_row = Some(end_display.row());
1160 } else {
1161 // Merge two hunks.
1162 *current_end = end_display.row();
1163 }
1164 } else {
1165 unreachable!();
1166 }
1167 }
1168 // We might still have a hunk that was not rendered (if there was a search hit on the last line)
1169 push_region(start_row, end_row);
1170 }
1171
1172 if layout.is_singleton && scrollbar_settings.git_diff {
1173 let diff_style = scrollbar_theme.git.clone();
1174 for hunk in layout
1175 .position_map
1176 .snapshot
1177 .buffer_snapshot
1178 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1179 {
1180 let start_display = Point::new(hunk.buffer_range.start, 0)
1181 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1182 let end_display = Point::new(hunk.buffer_range.end, 0)
1183 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1184 let start_y = y_for_row(start_display.row() as f32);
1185 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1186 y_for_row((end_display.row() + 1) as f32)
1187 } else {
1188 y_for_row((end_display.row()) as f32)
1189 };
1190
1191 if end_y - start_y < 1. {
1192 end_y = start_y + 1.;
1193 }
1194 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1195
1196 let color = match hunk.status() {
1197 DiffHunkStatus::Added => diff_style.inserted,
1198 DiffHunkStatus::Modified => diff_style.modified,
1199 DiffHunkStatus::Removed => diff_style.deleted,
1200 };
1201
1202 let border = Border {
1203 width: 1.,
1204 color: style.thumb.border.color,
1205 overlay: false,
1206 top: false,
1207 right: true,
1208 bottom: false,
1209 left: true,
1210 };
1211
1212 scene.push_quad(Quad {
1213 bounds,
1214 background: Some(color),
1215 border,
1216 corner_radius: style.thumb.corner_radius,
1217 })
1218 }
1219 }
1220
1221 scene.push_quad(Quad {
1222 bounds: thumb_bounds,
1223 border: style.thumb.border,
1224 background: style.thumb.background_color,
1225 corner_radius: style.thumb.corner_radius,
1226 });
1227 }
1228
1229 scene.push_cursor_region(CursorRegion {
1230 bounds: track_bounds,
1231 style: CursorStyle::Arrow,
1232 });
1233 scene.push_mouse_region(
1234 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1235 .on_move(move |event, editor: &mut Editor, cx| {
1236 if event.pressed_button.is_none() {
1237 editor.scroll_manager.show_scrollbar(cx);
1238 }
1239 })
1240 .on_down(MouseButton::Left, {
1241 let row_range = row_range.clone();
1242 move |event, editor: &mut Editor, cx| {
1243 let y = event.position.y();
1244 if y < thumb_top || thumb_bottom < y {
1245 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1246 let top_row = center_row
1247 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1248 let mut position = editor.scroll_position(cx);
1249 position.set_y(top_row as f32);
1250 editor.set_scroll_position(position, cx);
1251 } else {
1252 editor.scroll_manager.show_scrollbar(cx);
1253 }
1254 }
1255 })
1256 .on_drag(MouseButton::Left, {
1257 move |event, editor: &mut Editor, cx| {
1258 if event.end {
1259 return;
1260 }
1261
1262 let y = event.prev_mouse_position.y();
1263 let new_y = event.position.y();
1264 if thumb_top < y && y < thumb_bottom {
1265 let mut position = editor.scroll_position(cx);
1266 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1267 if position.y() < 0.0 {
1268 position.set_y(0.);
1269 }
1270 editor.set_scroll_position(position, cx);
1271 }
1272 }
1273 }),
1274 );
1275 }
1276
1277 #[allow(clippy::too_many_arguments)]
1278 fn paint_highlighted_range(
1279 &self,
1280 scene: &mut SceneBuilder,
1281 range: Range<DisplayPoint>,
1282 color: Color,
1283 corner_radius: f32,
1284 line_end_overshoot: f32,
1285 layout: &LayoutState,
1286 content_origin: Vector2F,
1287 scroll_top: f32,
1288 scroll_left: f32,
1289 bounds: RectF,
1290 ) {
1291 let start_row = layout.visible_display_row_range.start;
1292 let end_row = layout.visible_display_row_range.end;
1293 if range.start != range.end {
1294 let row_range = if range.end.column() == 0 {
1295 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1296 } else {
1297 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1298 };
1299
1300 let highlighted_range = HighlightedRange {
1301 color,
1302 line_height: layout.position_map.line_height,
1303 corner_radius,
1304 start_y: content_origin.y()
1305 + row_range.start as f32 * layout.position_map.line_height
1306 - scroll_top,
1307 lines: row_range
1308 .into_iter()
1309 .map(|row| {
1310 let line_layout =
1311 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1312 HighlightedRangeLine {
1313 start_x: if row == range.start.row() {
1314 content_origin.x()
1315 + line_layout.x_for_index(range.start.column() as usize)
1316 - scroll_left
1317 } else {
1318 content_origin.x() - scroll_left
1319 },
1320 end_x: if row == range.end.row() {
1321 content_origin.x()
1322 + line_layout.x_for_index(range.end.column() as usize)
1323 - scroll_left
1324 } else {
1325 content_origin.x() + line_layout.width() + line_end_overshoot
1326 - scroll_left
1327 },
1328 }
1329 })
1330 .collect(),
1331 };
1332
1333 highlighted_range.paint(bounds, scene);
1334 }
1335 }
1336
1337 fn paint_blocks(
1338 &mut self,
1339 scene: &mut SceneBuilder,
1340 bounds: RectF,
1341 visible_bounds: RectF,
1342 layout: &mut LayoutState,
1343 editor: &mut Editor,
1344 cx: &mut ViewContext<Editor>,
1345 ) {
1346 let scroll_position = layout.position_map.snapshot.scroll_position();
1347 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1348 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1349
1350 for block in &mut layout.blocks {
1351 let mut origin = bounds.origin()
1352 + vec2f(
1353 0.,
1354 block.row as f32 * layout.position_map.line_height - scroll_top,
1355 );
1356 if !matches!(block.style, BlockStyle::Sticky) {
1357 origin += vec2f(-scroll_left, 0.);
1358 }
1359 block
1360 .element
1361 .paint(scene, origin, visible_bounds, editor, cx);
1362 }
1363 }
1364
1365 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1366 let style = &self.style;
1367
1368 cx.text_layout_cache()
1369 .layout_str(
1370 " ".repeat(column).as_str(),
1371 style.text.font_size,
1372 &[(
1373 column,
1374 RunStyle {
1375 font_id: style.text.font_id,
1376 color: Color::black(),
1377 underline: Default::default(),
1378 },
1379 )],
1380 )
1381 .width()
1382 }
1383
1384 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1385 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1386 self.column_pixels(digit_count, cx)
1387 }
1388
1389 //Folds contained in a hunk are ignored apart from shrinking visual size
1390 //If a fold contains any hunks then that fold line is marked as modified
1391 fn layout_git_gutters(
1392 &self,
1393 display_rows: Range<u32>,
1394 snapshot: &EditorSnapshot,
1395 ) -> Vec<DisplayDiffHunk> {
1396 let buffer_snapshot = &snapshot.buffer_snapshot;
1397
1398 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1399 .to_point(snapshot)
1400 .row;
1401 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1402 .to_point(snapshot)
1403 .row;
1404
1405 buffer_snapshot
1406 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1407 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1408 .dedup()
1409 .collect()
1410 }
1411
1412 fn layout_line_numbers(
1413 &self,
1414 rows: Range<u32>,
1415 active_rows: &BTreeMap<u32, bool>,
1416 is_singleton: bool,
1417 snapshot: &EditorSnapshot,
1418 cx: &ViewContext<Editor>,
1419 ) -> (
1420 Vec<Option<text_layout::Line>>,
1421 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1422 ) {
1423 let style = &self.style;
1424 let include_line_numbers = snapshot.mode == EditorMode::Full;
1425 let mut line_number_layouts = Vec::with_capacity(rows.len());
1426 let mut fold_statuses = Vec::with_capacity(rows.len());
1427 let mut line_number = String::new();
1428 for (ix, row) in snapshot
1429 .buffer_rows(rows.start)
1430 .take((rows.end - rows.start) as usize)
1431 .enumerate()
1432 {
1433 let display_row = rows.start + ix as u32;
1434 let (active, color) = if active_rows.contains_key(&display_row) {
1435 (true, style.line_number_active)
1436 } else {
1437 (false, style.line_number)
1438 };
1439 if let Some(buffer_row) = row {
1440 if include_line_numbers {
1441 line_number.clear();
1442 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1443 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1444 &line_number,
1445 style.text.font_size,
1446 &[(
1447 line_number.len(),
1448 RunStyle {
1449 font_id: style.text.font_id,
1450 color,
1451 underline: Default::default(),
1452 },
1453 )],
1454 )));
1455 fold_statuses.push(
1456 is_singleton
1457 .then(|| {
1458 snapshot
1459 .fold_for_line(buffer_row)
1460 .map(|fold_status| (fold_status, buffer_row, active))
1461 })
1462 .flatten(),
1463 )
1464 }
1465 } else {
1466 fold_statuses.push(None);
1467 line_number_layouts.push(None);
1468 }
1469 }
1470
1471 (line_number_layouts, fold_statuses)
1472 }
1473
1474 fn layout_lines(
1475 &mut self,
1476 rows: Range<u32>,
1477 line_number_layouts: &[Option<Line>],
1478 snapshot: &EditorSnapshot,
1479 cx: &ViewContext<Editor>,
1480 ) -> Vec<LineWithInvisibles> {
1481 if rows.start >= rows.end {
1482 return Vec::new();
1483 }
1484
1485 // When the editor is empty and unfocused, then show the placeholder.
1486 if snapshot.is_empty() {
1487 let placeholder_style = self
1488 .style
1489 .placeholder_text
1490 .as_ref()
1491 .unwrap_or(&self.style.text);
1492 let placeholder_text = snapshot.placeholder_text();
1493 let placeholder_lines = placeholder_text
1494 .as_ref()
1495 .map_or("", AsRef::as_ref)
1496 .split('\n')
1497 .skip(rows.start as usize)
1498 .chain(iter::repeat(""))
1499 .take(rows.len());
1500 placeholder_lines
1501 .map(|line| {
1502 cx.text_layout_cache().layout_str(
1503 line,
1504 placeholder_style.font_size,
1505 &[(
1506 line.len(),
1507 RunStyle {
1508 font_id: placeholder_style.font_id,
1509 color: placeholder_style.color,
1510 underline: Default::default(),
1511 },
1512 )],
1513 )
1514 })
1515 .map(|line| LineWithInvisibles {
1516 line,
1517 invisibles: Vec::new(),
1518 })
1519 .collect()
1520 } else {
1521 let style = &self.style;
1522 let chunks = snapshot
1523 .chunks(
1524 rows.clone(),
1525 true,
1526 Some(style.theme.hint),
1527 Some(style.theme.suggestion),
1528 )
1529 .map(|chunk| {
1530 let mut highlight_style = chunk
1531 .syntax_highlight_id
1532 .and_then(|id| id.style(&style.syntax));
1533
1534 if let Some(chunk_highlight) = chunk.highlight_style {
1535 if let Some(highlight_style) = highlight_style.as_mut() {
1536 highlight_style.highlight(chunk_highlight);
1537 } else {
1538 highlight_style = Some(chunk_highlight);
1539 }
1540 }
1541
1542 let mut diagnostic_highlight = HighlightStyle::default();
1543
1544 if chunk.is_unnecessary {
1545 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1546 }
1547
1548 if let Some(severity) = chunk.diagnostic_severity {
1549 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1550 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1551 let diagnostic_style = super::diagnostic_style(severity, true, style);
1552 diagnostic_highlight.underline = Some(Underline {
1553 color: Some(diagnostic_style.message.text.color),
1554 thickness: 1.0.into(),
1555 squiggly: true,
1556 });
1557 }
1558 }
1559
1560 if let Some(highlight_style) = highlight_style.as_mut() {
1561 highlight_style.highlight(diagnostic_highlight);
1562 } else {
1563 highlight_style = Some(diagnostic_highlight);
1564 }
1565
1566 HighlightedChunk {
1567 chunk: chunk.text,
1568 style: highlight_style,
1569 is_tab: chunk.is_tab,
1570 }
1571 });
1572
1573 LineWithInvisibles::from_chunks(
1574 chunks,
1575 &style.text,
1576 cx.text_layout_cache(),
1577 cx.font_cache(),
1578 MAX_LINE_LEN,
1579 rows.len() as usize,
1580 line_number_layouts,
1581 snapshot.mode,
1582 )
1583 }
1584 }
1585
1586 #[allow(clippy::too_many_arguments)]
1587 fn layout_blocks(
1588 &mut self,
1589 rows: Range<u32>,
1590 snapshot: &EditorSnapshot,
1591 editor_width: f32,
1592 scroll_width: f32,
1593 gutter_padding: f32,
1594 gutter_width: f32,
1595 em_width: f32,
1596 text_x: f32,
1597 line_height: f32,
1598 style: &EditorStyle,
1599 line_layouts: &[LineWithInvisibles],
1600 editor: &mut Editor,
1601 cx: &mut LayoutContext<Editor>,
1602 ) -> (f32, Vec<BlockLayout>) {
1603 let mut block_id = 0;
1604 let scroll_x = snapshot.scroll_anchor.offset.x();
1605 let (fixed_blocks, non_fixed_blocks) = snapshot
1606 .blocks_in_range(rows.clone())
1607 .partition::<Vec<_>, _>(|(_, block)| match block {
1608 TransformBlock::ExcerptHeader { .. } => false,
1609 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1610 });
1611 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1612 let mut element = match block {
1613 TransformBlock::Custom(block) => {
1614 let align_to = block
1615 .position()
1616 .to_point(&snapshot.buffer_snapshot)
1617 .to_display_point(snapshot);
1618 let anchor_x = text_x
1619 + if rows.contains(&align_to.row()) {
1620 line_layouts[(align_to.row() - rows.start) as usize]
1621 .line
1622 .x_for_index(align_to.column() as usize)
1623 } else {
1624 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1625 .x_for_index(align_to.column() as usize)
1626 };
1627
1628 block.render(&mut BlockContext {
1629 view_context: cx,
1630 anchor_x,
1631 gutter_padding,
1632 line_height,
1633 scroll_x,
1634 gutter_width,
1635 em_width,
1636 block_id,
1637 })
1638 }
1639 TransformBlock::ExcerptHeader {
1640 id,
1641 buffer,
1642 range,
1643 starts_new_buffer,
1644 ..
1645 } => {
1646 let tooltip_style = theme::current(cx).tooltip.clone();
1647 let include_root = editor
1648 .project
1649 .as_ref()
1650 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1651 .unwrap_or_default();
1652 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1653 let jump_path = ProjectPath {
1654 worktree_id: file.worktree_id(cx),
1655 path: file.path.clone(),
1656 };
1657 let jump_anchor = range
1658 .primary
1659 .as_ref()
1660 .map_or(range.context.start, |primary| primary.start);
1661 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1662
1663 enum JumpIcon {}
1664 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1665 let style = style.jump_icon.style_for(state);
1666 Svg::new("icons/arrow_up_right_8.svg")
1667 .with_color(style.color)
1668 .constrained()
1669 .with_width(style.icon_width)
1670 .aligned()
1671 .contained()
1672 .with_style(style.container)
1673 .constrained()
1674 .with_width(style.button_width)
1675 .with_height(style.button_width)
1676 })
1677 .with_cursor_style(CursorStyle::PointingHand)
1678 .on_click(MouseButton::Left, move |_, editor, cx| {
1679 if let Some(workspace) = editor
1680 .workspace
1681 .as_ref()
1682 .and_then(|(workspace, _)| workspace.upgrade(cx))
1683 {
1684 workspace.update(cx, |workspace, cx| {
1685 Editor::jump(
1686 workspace,
1687 jump_path.clone(),
1688 jump_position,
1689 jump_anchor,
1690 cx,
1691 );
1692 });
1693 }
1694 })
1695 .with_tooltip::<JumpIcon>(
1696 (*id).into(),
1697 "Jump to Buffer".to_string(),
1698 Some(Box::new(crate::OpenExcerpts)),
1699 tooltip_style.clone(),
1700 cx,
1701 )
1702 .aligned()
1703 .flex_float()
1704 });
1705
1706 if *starts_new_buffer {
1707 let editor_font_size = style.text.font_size;
1708 let style = &style.diagnostic_path_header;
1709 let font_size = (style.text_scale_factor * editor_font_size).round();
1710
1711 let path = buffer.resolve_file_path(cx, include_root);
1712 let mut filename = None;
1713 let mut parent_path = None;
1714 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1715 if let Some(path) = path {
1716 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1717 parent_path =
1718 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1719 }
1720
1721 Flex::row()
1722 .with_child(
1723 Label::new(
1724 filename.unwrap_or_else(|| "untitled".to_string()),
1725 style.filename.text.clone().with_font_size(font_size),
1726 )
1727 .contained()
1728 .with_style(style.filename.container)
1729 .aligned(),
1730 )
1731 .with_children(parent_path.map(|path| {
1732 Label::new(path, style.path.text.clone().with_font_size(font_size))
1733 .contained()
1734 .with_style(style.path.container)
1735 .aligned()
1736 }))
1737 .with_children(jump_icon)
1738 .contained()
1739 .with_style(style.container)
1740 .with_padding_left(gutter_padding)
1741 .with_padding_right(gutter_padding)
1742 .expanded()
1743 .into_any_named("path header block")
1744 } else {
1745 let text_style = style.text.clone();
1746 Flex::row()
1747 .with_child(Label::new("⋯", text_style))
1748 .with_children(jump_icon)
1749 .contained()
1750 .with_padding_left(gutter_padding)
1751 .with_padding_right(gutter_padding)
1752 .expanded()
1753 .into_any_named("collapsed context")
1754 }
1755 }
1756 };
1757
1758 element.layout(
1759 SizeConstraint {
1760 min: Vector2F::zero(),
1761 max: vec2f(width, block.height() as f32 * line_height),
1762 },
1763 editor,
1764 cx,
1765 );
1766 element
1767 };
1768
1769 let mut fixed_block_max_width = 0f32;
1770 let mut blocks = Vec::new();
1771 for (row, block) in fixed_blocks {
1772 let element = render_block(block, f32::INFINITY, block_id);
1773 block_id += 1;
1774 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1775 blocks.push(BlockLayout {
1776 row,
1777 element,
1778 style: BlockStyle::Fixed,
1779 });
1780 }
1781 for (row, block) in non_fixed_blocks {
1782 let style = match block {
1783 TransformBlock::Custom(block) => block.style(),
1784 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1785 };
1786 let width = match style {
1787 BlockStyle::Sticky => editor_width,
1788 BlockStyle::Flex => editor_width
1789 .max(fixed_block_max_width)
1790 .max(gutter_width + scroll_width),
1791 BlockStyle::Fixed => unreachable!(),
1792 };
1793 let element = render_block(block, width, block_id);
1794 block_id += 1;
1795 blocks.push(BlockLayout {
1796 row,
1797 element,
1798 style,
1799 });
1800 }
1801 (
1802 scroll_width.max(fixed_block_max_width - gutter_width),
1803 blocks,
1804 )
1805 }
1806}
1807
1808struct HighlightedChunk<'a> {
1809 chunk: &'a str,
1810 style: Option<HighlightStyle>,
1811 is_tab: bool,
1812}
1813
1814#[derive(Debug)]
1815pub struct LineWithInvisibles {
1816 pub line: Line,
1817 invisibles: Vec<Invisible>,
1818}
1819
1820impl LineWithInvisibles {
1821 fn from_chunks<'a>(
1822 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1823 text_style: &TextStyle,
1824 text_layout_cache: &TextLayoutCache,
1825 font_cache: &Arc<FontCache>,
1826 max_line_len: usize,
1827 max_line_count: usize,
1828 line_number_layouts: &[Option<Line>],
1829 editor_mode: EditorMode,
1830 ) -> Vec<Self> {
1831 let mut layouts = Vec::with_capacity(max_line_count);
1832 let mut line = String::new();
1833 let mut invisibles = Vec::new();
1834 let mut styles = Vec::new();
1835 let mut non_whitespace_added = false;
1836 let mut row = 0;
1837 let mut line_exceeded_max_len = false;
1838 for highlighted_chunk in chunks.chain([HighlightedChunk {
1839 chunk: "\n",
1840 style: None,
1841 is_tab: false,
1842 }]) {
1843 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1844 if ix > 0 {
1845 layouts.push(Self {
1846 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1847 invisibles: invisibles.drain(..).collect(),
1848 });
1849
1850 line.clear();
1851 styles.clear();
1852 row += 1;
1853 line_exceeded_max_len = false;
1854 non_whitespace_added = false;
1855 if row == max_line_count {
1856 return layouts;
1857 }
1858 }
1859
1860 if !line_chunk.is_empty() && !line_exceeded_max_len {
1861 let text_style = if let Some(style) = highlighted_chunk.style {
1862 text_style
1863 .clone()
1864 .highlight(style, font_cache)
1865 .map(Cow::Owned)
1866 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1867 } else {
1868 Cow::Borrowed(text_style)
1869 };
1870
1871 if line.len() + line_chunk.len() > max_line_len {
1872 let mut chunk_len = max_line_len - line.len();
1873 while !line_chunk.is_char_boundary(chunk_len) {
1874 chunk_len -= 1;
1875 }
1876 line_chunk = &line_chunk[..chunk_len];
1877 line_exceeded_max_len = true;
1878 }
1879
1880 styles.push((
1881 line_chunk.len(),
1882 RunStyle {
1883 font_id: text_style.font_id,
1884 color: text_style.color,
1885 underline: text_style.underline,
1886 },
1887 ));
1888
1889 if editor_mode == EditorMode::Full {
1890 // Line wrap pads its contents with fake whitespaces,
1891 // avoid printing them
1892 let inside_wrapped_string = line_number_layouts
1893 .get(row)
1894 .and_then(|layout| layout.as_ref())
1895 .is_none();
1896 if highlighted_chunk.is_tab {
1897 if non_whitespace_added || !inside_wrapped_string {
1898 invisibles.push(Invisible::Tab {
1899 line_start_offset: line.len(),
1900 });
1901 }
1902 } else {
1903 invisibles.extend(
1904 line_chunk
1905 .chars()
1906 .enumerate()
1907 .filter(|(_, line_char)| {
1908 let is_whitespace = line_char.is_whitespace();
1909 non_whitespace_added |= !is_whitespace;
1910 is_whitespace
1911 && (non_whitespace_added || !inside_wrapped_string)
1912 })
1913 .map(|(whitespace_index, _)| Invisible::Whitespace {
1914 line_offset: line.len() + whitespace_index,
1915 }),
1916 )
1917 }
1918 }
1919
1920 line.push_str(line_chunk);
1921 }
1922 }
1923 }
1924
1925 layouts
1926 }
1927
1928 fn draw(
1929 &self,
1930 layout: &LayoutState,
1931 row: u32,
1932 scroll_top: f32,
1933 scene: &mut SceneBuilder,
1934 content_origin: Vector2F,
1935 scroll_left: f32,
1936 visible_text_bounds: RectF,
1937 whitespace_setting: ShowWhitespaceSetting,
1938 selection_ranges: &[Range<DisplayPoint>],
1939 visible_bounds: RectF,
1940 cx: &mut ViewContext<Editor>,
1941 ) {
1942 let line_height = layout.position_map.line_height;
1943 let line_y = row as f32 * line_height - scroll_top;
1944
1945 self.line.paint(
1946 scene,
1947 content_origin + vec2f(-scroll_left, line_y),
1948 visible_text_bounds,
1949 line_height,
1950 cx,
1951 );
1952
1953 self.draw_invisibles(
1954 &selection_ranges,
1955 layout,
1956 content_origin,
1957 scroll_left,
1958 line_y,
1959 row,
1960 scene,
1961 visible_bounds,
1962 line_height,
1963 whitespace_setting,
1964 cx,
1965 );
1966 }
1967
1968 fn draw_invisibles(
1969 &self,
1970 selection_ranges: &[Range<DisplayPoint>],
1971 layout: &LayoutState,
1972 content_origin: Vector2F,
1973 scroll_left: f32,
1974 line_y: f32,
1975 row: u32,
1976 scene: &mut SceneBuilder,
1977 visible_bounds: RectF,
1978 line_height: f32,
1979 whitespace_setting: ShowWhitespaceSetting,
1980 cx: &mut ViewContext<Editor>,
1981 ) {
1982 let allowed_invisibles_regions = match whitespace_setting {
1983 ShowWhitespaceSetting::None => return,
1984 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1985 ShowWhitespaceSetting::All => None,
1986 };
1987
1988 for invisible in &self.invisibles {
1989 let (&token_offset, invisible_symbol) = match invisible {
1990 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1991 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1992 };
1993
1994 let x_offset = self.line.x_for_index(token_offset);
1995 let invisible_offset =
1996 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1997 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1998
1999 if let Some(allowed_regions) = allowed_invisibles_regions {
2000 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2001 if !allowed_regions
2002 .iter()
2003 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2004 {
2005 continue;
2006 }
2007 }
2008 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2009 }
2010 }
2011}
2012
2013#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2014enum Invisible {
2015 Tab { line_start_offset: usize },
2016 Whitespace { line_offset: usize },
2017}
2018
2019impl Element<Editor> for EditorElement {
2020 type LayoutState = LayoutState;
2021 type PaintState = ();
2022
2023 fn layout(
2024 &mut self,
2025 constraint: SizeConstraint,
2026 editor: &mut Editor,
2027 cx: &mut LayoutContext<Editor>,
2028 ) -> (Vector2F, Self::LayoutState) {
2029 let mut size = constraint.max;
2030 if size.x().is_infinite() {
2031 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2032 }
2033
2034 let snapshot = editor.snapshot(cx);
2035 let style = self.style.clone();
2036
2037 let line_height = (style.text.font_size * style.line_height_scalar).round();
2038
2039 let gutter_padding;
2040 let gutter_width;
2041 let gutter_margin;
2042 if snapshot.show_gutter {
2043 let em_width = style.text.em_width(cx.font_cache());
2044 gutter_padding = (em_width * style.gutter_padding_factor).round();
2045 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2046 gutter_margin = -style.text.descent(cx.font_cache());
2047 } else {
2048 gutter_padding = 0.0;
2049 gutter_width = 0.0;
2050 gutter_margin = 0.0;
2051 };
2052
2053 let text_width = size.x() - gutter_width;
2054 let em_width = style.text.em_width(cx.font_cache());
2055 let em_advance = style.text.em_advance(cx.font_cache());
2056 let overscroll = vec2f(em_width, 0.);
2057 let snapshot = {
2058 editor.set_visible_line_count(size.y() / line_height, cx);
2059
2060 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2061 let wrap_width = match editor.soft_wrap_mode(cx) {
2062 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2063 SoftWrap::EditorWidth => editor_width,
2064 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2065 };
2066
2067 if editor.set_wrap_width(Some(wrap_width), cx) {
2068 editor.snapshot(cx)
2069 } else {
2070 snapshot
2071 }
2072 };
2073
2074 let wrap_guides = editor
2075 .wrap_guides(cx)
2076 .iter()
2077 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2078 .collect();
2079
2080 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2081 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2082 size.set_y(
2083 scroll_height
2084 .min(constraint.max_along(Axis::Vertical))
2085 .max(constraint.min_along(Axis::Vertical))
2086 .min(line_height * max_lines as f32),
2087 )
2088 } else if let EditorMode::SingleLine = snapshot.mode {
2089 size.set_y(
2090 line_height
2091 .min(constraint.max_along(Axis::Vertical))
2092 .max(constraint.min_along(Axis::Vertical)),
2093 )
2094 } else if size.y().is_infinite() {
2095 size.set_y(scroll_height);
2096 }
2097 let gutter_size = vec2f(gutter_width, size.y());
2098 let text_size = vec2f(text_width, size.y());
2099
2100 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2101 let mut snapshot = editor.snapshot(cx);
2102
2103 let scroll_position = snapshot.scroll_position();
2104 // The scroll position is a fractional point, the whole number of which represents
2105 // the top of the window in terms of display rows.
2106 let start_row = scroll_position.y() as u32;
2107 let height_in_lines = size.y() / line_height;
2108 let max_row = snapshot.max_point().row();
2109
2110 // Add 1 to ensure selections bleed off screen
2111 let end_row = 1 + cmp::min(
2112 (scroll_position.y() + height_in_lines).ceil() as u32,
2113 max_row,
2114 );
2115
2116 let start_anchor = if start_row == 0 {
2117 Anchor::min()
2118 } else {
2119 snapshot
2120 .buffer_snapshot
2121 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2122 };
2123 let end_anchor = if end_row > max_row {
2124 Anchor::max()
2125 } else {
2126 snapshot
2127 .buffer_snapshot
2128 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2129 };
2130
2131 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2132 let mut active_rows = BTreeMap::new();
2133 let mut fold_ranges = Vec::new();
2134 let is_singleton = editor.is_singleton(cx);
2135
2136 let highlighted_rows = editor.highlighted_rows();
2137 let theme = theme::current(cx);
2138 let highlighted_ranges = editor.background_highlights_in_range(
2139 start_anchor..end_anchor,
2140 &snapshot.display_snapshot,
2141 theme.as_ref(),
2142 );
2143
2144 fold_ranges.extend(
2145 snapshot
2146 .folds_in_range(start_anchor..end_anchor)
2147 .map(|anchor| {
2148 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2149 (
2150 start.row,
2151 start.to_display_point(&snapshot.display_snapshot)
2152 ..anchor.end.to_display_point(&snapshot),
2153 )
2154 }),
2155 );
2156
2157 let mut remote_selections = HashMap::default();
2158 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2159 .buffer_snapshot
2160 .remote_selections_in_range(&(start_anchor..end_anchor))
2161 {
2162 // The local selections match the leader's selections.
2163 if Some(replica_id) == editor.leader_replica_id {
2164 continue;
2165 }
2166 remote_selections
2167 .entry(replica_id)
2168 .or_insert(Vec::new())
2169 .push(SelectionLayout::new(
2170 selection,
2171 line_mode,
2172 cursor_shape,
2173 &snapshot.display_snapshot,
2174 false,
2175 ));
2176 }
2177 selections.extend(remote_selections);
2178
2179 if editor.show_local_selections {
2180 let mut local_selections = editor
2181 .selections
2182 .disjoint_in_range(start_anchor..end_anchor, cx);
2183 local_selections.extend(editor.selections.pending(cx));
2184 let newest = editor.selections.newest(cx);
2185 for selection in &local_selections {
2186 let is_empty = selection.start == selection.end;
2187 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2188 let selection_end = snapshot.next_line_boundary(selection.end).1;
2189 for row in cmp::max(selection_start.row(), start_row)
2190 ..=cmp::min(selection_end.row(), end_row)
2191 {
2192 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2193 *contains_non_empty_selection |= !is_empty;
2194 }
2195 }
2196
2197 // Render the local selections in the leader's color when following.
2198 let local_replica_id = editor
2199 .leader_replica_id
2200 .unwrap_or_else(|| editor.replica_id(cx));
2201
2202 selections.push((
2203 local_replica_id,
2204 local_selections
2205 .into_iter()
2206 .map(|selection| {
2207 let is_newest = selection == newest;
2208 SelectionLayout::new(
2209 selection,
2210 editor.selections.line_mode,
2211 editor.cursor_shape,
2212 &snapshot.display_snapshot,
2213 is_newest,
2214 )
2215 })
2216 .collect(),
2217 ));
2218 }
2219
2220 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2221 let show_scrollbars = match scrollbar_settings.show {
2222 ShowScrollbar::Auto => {
2223 // Git
2224 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2225 ||
2226 // Selections
2227 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2228 // Scrollmanager
2229 || editor.scroll_manager.scrollbars_visible()
2230 }
2231 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2232 ShowScrollbar::Always => true,
2233 ShowScrollbar::Never => false,
2234 };
2235
2236 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2237 .into_iter()
2238 .map(|(id, fold)| {
2239 let color = self
2240 .style
2241 .folds
2242 .ellipses
2243 .background
2244 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2245 .color;
2246
2247 (id, fold, color)
2248 })
2249 .collect();
2250
2251 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2252 start_row..end_row,
2253 &active_rows,
2254 is_singleton,
2255 &snapshot,
2256 cx,
2257 );
2258
2259 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2260
2261 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2262
2263 let mut max_visible_line_width = 0.0;
2264 let line_layouts =
2265 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2266 for line_with_invisibles in &line_layouts {
2267 if line_with_invisibles.line.width() > max_visible_line_width {
2268 max_visible_line_width = line_with_invisibles.line.width();
2269 }
2270 }
2271
2272 let style = self.style.clone();
2273 let longest_line_width = layout_line(
2274 snapshot.longest_row(),
2275 &snapshot,
2276 &style,
2277 cx.text_layout_cache(),
2278 )
2279 .width();
2280 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2281 let em_width = style.text.em_width(cx.font_cache());
2282 let (scroll_width, blocks) = self.layout_blocks(
2283 start_row..end_row,
2284 &snapshot,
2285 size.x(),
2286 scroll_width,
2287 gutter_padding,
2288 gutter_width,
2289 em_width,
2290 gutter_width + gutter_margin,
2291 line_height,
2292 &style,
2293 &line_layouts,
2294 editor,
2295 cx,
2296 );
2297
2298 let scroll_max = vec2f(
2299 ((scroll_width - text_size.x()) / em_width).max(0.0),
2300 max_row as f32,
2301 );
2302
2303 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2304
2305 let autoscrolled = if autoscroll_horizontally {
2306 editor.autoscroll_horizontally(
2307 start_row,
2308 text_size.x(),
2309 scroll_width,
2310 em_width,
2311 &line_layouts,
2312 cx,
2313 )
2314 } else {
2315 false
2316 };
2317
2318 if clamped || autoscrolled {
2319 snapshot = editor.snapshot(cx);
2320 }
2321
2322 let newest_selection_head = editor
2323 .selections
2324 .newest::<usize>(cx)
2325 .head()
2326 .to_display_point(&snapshot);
2327 let style = editor.style(cx);
2328
2329 let mut context_menu = None;
2330 let mut code_actions_indicator = None;
2331 if (start_row..end_row).contains(&newest_selection_head.row()) {
2332 if editor.context_menu_visible() {
2333 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2334 }
2335
2336 let active = matches!(
2337 editor.context_menu,
2338 Some(crate::ContextMenu::CodeActions(_))
2339 );
2340
2341 code_actions_indicator = editor
2342 .render_code_actions_indicator(&style, active, cx)
2343 .map(|indicator| (newest_selection_head.row(), indicator));
2344 }
2345
2346 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2347 let mut hover = editor
2348 .hover_state
2349 .render(&snapshot, &style, visible_rows, cx);
2350 let mode = editor.mode;
2351
2352 let mut fold_indicators = editor.render_fold_indicators(
2353 fold_statuses,
2354 &style,
2355 editor.gutter_hovered,
2356 line_height,
2357 gutter_margin,
2358 cx,
2359 );
2360
2361 if let Some((_, context_menu)) = context_menu.as_mut() {
2362 context_menu.layout(
2363 SizeConstraint {
2364 min: Vector2F::zero(),
2365 max: vec2f(
2366 cx.window_size().x() * 0.7,
2367 (12. * line_height).min((size.y() - line_height) / 2.),
2368 ),
2369 },
2370 editor,
2371 cx,
2372 );
2373 }
2374
2375 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2376 indicator.layout(
2377 SizeConstraint::strict_along(
2378 Axis::Vertical,
2379 line_height * style.code_actions.vertical_scale,
2380 ),
2381 editor,
2382 cx,
2383 );
2384 }
2385
2386 for fold_indicator in fold_indicators.iter_mut() {
2387 if let Some(indicator) = fold_indicator.as_mut() {
2388 indicator.layout(
2389 SizeConstraint::strict_along(
2390 Axis::Vertical,
2391 line_height * style.code_actions.vertical_scale,
2392 ),
2393 editor,
2394 cx,
2395 );
2396 }
2397 }
2398
2399 if let Some((_, hover_popovers)) = hover.as_mut() {
2400 for hover_popover in hover_popovers.iter_mut() {
2401 hover_popover.layout(
2402 SizeConstraint {
2403 min: Vector2F::zero(),
2404 max: vec2f(
2405 (120. * em_width) // Default size
2406 .min(size.x() / 2.) // Shrink to half of the editor width
2407 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2408 (16. * line_height) // Default size
2409 .min(size.y() / 2.) // Shrink to half of the editor height
2410 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2411 ),
2412 },
2413 editor,
2414 cx,
2415 );
2416 }
2417 }
2418
2419 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2420 let invisible_symbol_style = RunStyle {
2421 color: self.style.whitespace,
2422 font_id: self.style.text.font_id,
2423 underline: Default::default(),
2424 };
2425
2426 (
2427 size,
2428 LayoutState {
2429 mode,
2430 position_map: Arc::new(PositionMap {
2431 size,
2432 scroll_max,
2433 line_layouts,
2434 line_height,
2435 em_width,
2436 em_advance,
2437 snapshot,
2438 }),
2439 visible_display_row_range: start_row..end_row,
2440 wrap_guides,
2441 gutter_size,
2442 gutter_padding,
2443 text_size,
2444 scrollbar_row_range,
2445 show_scrollbars,
2446 is_singleton,
2447 max_row,
2448 gutter_margin,
2449 active_rows,
2450 highlighted_rows,
2451 highlighted_ranges,
2452 fold_ranges,
2453 line_number_layouts,
2454 display_hunks,
2455 blocks,
2456 selections,
2457 context_menu,
2458 code_actions_indicator,
2459 fold_indicators,
2460 tab_invisible: cx.text_layout_cache().layout_str(
2461 "→",
2462 invisible_symbol_font_size,
2463 &[("→".len(), invisible_symbol_style)],
2464 ),
2465 space_invisible: cx.text_layout_cache().layout_str(
2466 "•",
2467 invisible_symbol_font_size,
2468 &[("•".len(), invisible_symbol_style)],
2469 ),
2470 hover_popovers: hover,
2471 },
2472 )
2473 }
2474
2475 fn paint(
2476 &mut self,
2477 scene: &mut SceneBuilder,
2478 bounds: RectF,
2479 visible_bounds: RectF,
2480 layout: &mut Self::LayoutState,
2481 editor: &mut Editor,
2482 cx: &mut ViewContext<Editor>,
2483 ) -> Self::PaintState {
2484 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2485 scene.push_layer(Some(visible_bounds));
2486
2487 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2488 let text_bounds = RectF::new(
2489 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2490 layout.text_size,
2491 );
2492
2493 Self::attach_mouse_handlers(
2494 scene,
2495 &layout.position_map,
2496 layout.hover_popovers.is_some(),
2497 visible_bounds,
2498 text_bounds,
2499 gutter_bounds,
2500 bounds,
2501 cx,
2502 );
2503
2504 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2505 if layout.gutter_size.x() > 0. {
2506 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2507 }
2508 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2509
2510 scene.push_layer(Some(bounds));
2511 if !layout.blocks.is_empty() {
2512 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2513 }
2514 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2515 scene.pop_layer();
2516
2517 scene.pop_layer();
2518 }
2519
2520 fn rect_for_text_range(
2521 &self,
2522 range_utf16: Range<usize>,
2523 bounds: RectF,
2524 _: RectF,
2525 layout: &Self::LayoutState,
2526 _: &Self::PaintState,
2527 _: &Editor,
2528 _: &ViewContext<Editor>,
2529 ) -> Option<RectF> {
2530 let text_bounds = RectF::new(
2531 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2532 layout.text_size,
2533 );
2534 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2535 let scroll_position = layout.position_map.snapshot.scroll_position();
2536 let start_row = scroll_position.y() as u32;
2537 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2538 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2539
2540 let range_start = OffsetUtf16(range_utf16.start)
2541 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2542 if range_start.row() < start_row {
2543 return None;
2544 }
2545
2546 let line = &layout
2547 .position_map
2548 .line_layouts
2549 .get((range_start.row() - start_row) as usize)?
2550 .line;
2551 let range_start_x = line.x_for_index(range_start.column() as usize);
2552 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2553 Some(RectF::new(
2554 content_origin
2555 + vec2f(
2556 range_start_x,
2557 range_start_y + layout.position_map.line_height,
2558 )
2559 - vec2f(scroll_left, scroll_top),
2560 vec2f(
2561 layout.position_map.em_width,
2562 layout.position_map.line_height,
2563 ),
2564 ))
2565 }
2566
2567 fn debug(
2568 &self,
2569 bounds: RectF,
2570 _: &Self::LayoutState,
2571 _: &Self::PaintState,
2572 _: &Editor,
2573 _: &ViewContext<Editor>,
2574 ) -> json::Value {
2575 json!({
2576 "type": "BufferElement",
2577 "bounds": bounds.to_json()
2578 })
2579 }
2580}
2581
2582type BufferRow = u32;
2583
2584pub struct LayoutState {
2585 position_map: Arc<PositionMap>,
2586 gutter_size: Vector2F,
2587 gutter_padding: f32,
2588 gutter_margin: f32,
2589 text_size: Vector2F,
2590 mode: EditorMode,
2591 wrap_guides: SmallVec<[(f32, bool); 2]>,
2592 visible_display_row_range: Range<u32>,
2593 active_rows: BTreeMap<u32, bool>,
2594 highlighted_rows: Option<Range<u32>>,
2595 line_number_layouts: Vec<Option<text_layout::Line>>,
2596 display_hunks: Vec<DisplayDiffHunk>,
2597 blocks: Vec<BlockLayout>,
2598 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2599 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2600 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2601 scrollbar_row_range: Range<f32>,
2602 show_scrollbars: bool,
2603 is_singleton: bool,
2604 max_row: u32,
2605 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2606 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2607 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2608 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2609 tab_invisible: Line,
2610 space_invisible: Line,
2611}
2612
2613struct PositionMap {
2614 size: Vector2F,
2615 line_height: f32,
2616 scroll_max: Vector2F,
2617 em_width: f32,
2618 em_advance: f32,
2619 line_layouts: Vec<LineWithInvisibles>,
2620 snapshot: EditorSnapshot,
2621}
2622
2623impl PositionMap {
2624 /// Returns two display points:
2625 /// 1. The nearest *valid* position in the editor
2626 /// 2. An unclipped, potentially *invalid* position that maps directly to
2627 /// the given pixel position.
2628 fn point_for_position(
2629 &self,
2630 text_bounds: RectF,
2631 position: Vector2F,
2632 ) -> (DisplayPoint, DisplayPoint) {
2633 let scroll_position = self.snapshot.scroll_position();
2634 let position = position - text_bounds.origin();
2635 let y = position.y().max(0.0).min(self.size.y());
2636 let x = position.x() + (scroll_position.x() * self.em_width);
2637 let row = (y / self.line_height + scroll_position.y()) as u32;
2638 let (column, x_overshoot) = if let Some(line) = self
2639 .line_layouts
2640 .get(row as usize - scroll_position.y() as usize)
2641 .map(|line_with_spaces| &line_with_spaces.line)
2642 {
2643 if let Some(ix) = line.index_for_x(x) {
2644 (ix as u32, 0.0)
2645 } else {
2646 (line.len() as u32, 0f32.max(x - line.width()))
2647 }
2648 } else {
2649 (0, x)
2650 };
2651
2652 let mut target_point = DisplayPoint::new(row, column);
2653 let point = self.snapshot.clip_point(target_point, Bias::Left);
2654 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2655
2656 (point, target_point)
2657 }
2658}
2659
2660struct BlockLayout {
2661 row: u32,
2662 element: AnyElement<Editor>,
2663 style: BlockStyle,
2664}
2665
2666fn layout_line(
2667 row: u32,
2668 snapshot: &EditorSnapshot,
2669 style: &EditorStyle,
2670 layout_cache: &TextLayoutCache,
2671) -> text_layout::Line {
2672 let mut line = snapshot.line(row);
2673
2674 if line.len() > MAX_LINE_LEN {
2675 let mut len = MAX_LINE_LEN;
2676 while !line.is_char_boundary(len) {
2677 len -= 1;
2678 }
2679
2680 line.truncate(len);
2681 }
2682
2683 layout_cache.layout_str(
2684 &line,
2685 style.text.font_size,
2686 &[(
2687 snapshot.line_len(row) as usize,
2688 RunStyle {
2689 font_id: style.text.font_id,
2690 color: Color::black(),
2691 underline: Default::default(),
2692 },
2693 )],
2694 )
2695}
2696
2697#[derive(Debug)]
2698pub struct Cursor {
2699 origin: Vector2F,
2700 block_width: f32,
2701 line_height: f32,
2702 color: Color,
2703 shape: CursorShape,
2704 block_text: Option<Line>,
2705}
2706
2707impl Cursor {
2708 pub fn new(
2709 origin: Vector2F,
2710 block_width: f32,
2711 line_height: f32,
2712 color: Color,
2713 shape: CursorShape,
2714 block_text: Option<Line>,
2715 ) -> Cursor {
2716 Cursor {
2717 origin,
2718 block_width,
2719 line_height,
2720 color,
2721 shape,
2722 block_text,
2723 }
2724 }
2725
2726 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2727 RectF::new(
2728 self.origin + origin,
2729 vec2f(self.block_width, self.line_height),
2730 )
2731 }
2732
2733 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2734 let bounds = match self.shape {
2735 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2736 CursorShape::Block | CursorShape::Hollow => RectF::new(
2737 self.origin + origin,
2738 vec2f(self.block_width, self.line_height),
2739 ),
2740 CursorShape::Underscore => RectF::new(
2741 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2742 vec2f(self.block_width, 2.0),
2743 ),
2744 };
2745
2746 //Draw background or border quad
2747 if matches!(self.shape, CursorShape::Hollow) {
2748 scene.push_quad(Quad {
2749 bounds,
2750 background: None,
2751 border: Border::all(1., self.color),
2752 corner_radius: 0.,
2753 });
2754 } else {
2755 scene.push_quad(Quad {
2756 bounds,
2757 background: Some(self.color),
2758 border: Default::default(),
2759 corner_radius: 0.,
2760 });
2761 }
2762
2763 if let Some(block_text) = &self.block_text {
2764 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2765 }
2766 }
2767
2768 pub fn shape(&self) -> CursorShape {
2769 self.shape
2770 }
2771}
2772
2773#[derive(Debug)]
2774pub struct HighlightedRange {
2775 pub start_y: f32,
2776 pub line_height: f32,
2777 pub lines: Vec<HighlightedRangeLine>,
2778 pub color: Color,
2779 pub corner_radius: f32,
2780}
2781
2782#[derive(Debug)]
2783pub struct HighlightedRangeLine {
2784 pub start_x: f32,
2785 pub end_x: f32,
2786}
2787
2788impl HighlightedRange {
2789 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2790 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2791 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2792 self.paint_lines(
2793 self.start_y + self.line_height,
2794 &self.lines[1..],
2795 bounds,
2796 scene,
2797 );
2798 } else {
2799 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2800 }
2801 }
2802
2803 fn paint_lines(
2804 &self,
2805 start_y: f32,
2806 lines: &[HighlightedRangeLine],
2807 bounds: RectF,
2808 scene: &mut SceneBuilder,
2809 ) {
2810 if lines.is_empty() {
2811 return;
2812 }
2813
2814 let mut path = PathBuilder::new();
2815 let first_line = lines.first().unwrap();
2816 let last_line = lines.last().unwrap();
2817
2818 let first_top_left = vec2f(first_line.start_x, start_y);
2819 let first_top_right = vec2f(first_line.end_x, start_y);
2820
2821 let curve_height = vec2f(0., self.corner_radius);
2822 let curve_width = |start_x: f32, end_x: f32| {
2823 let max = (end_x - start_x) / 2.;
2824 let width = if max < self.corner_radius {
2825 max
2826 } else {
2827 self.corner_radius
2828 };
2829
2830 vec2f(width, 0.)
2831 };
2832
2833 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2834 path.reset(first_top_right - top_curve_width);
2835 path.curve_to(first_top_right + curve_height, first_top_right);
2836
2837 let mut iter = lines.iter().enumerate().peekable();
2838 while let Some((ix, line)) = iter.next() {
2839 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2840
2841 if let Some((_, next_line)) = iter.peek() {
2842 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2843
2844 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2845 Ordering::Equal => {
2846 path.line_to(bottom_right);
2847 }
2848 Ordering::Less => {
2849 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2850 path.line_to(bottom_right - curve_height);
2851 if self.corner_radius > 0. {
2852 path.curve_to(bottom_right - curve_width, bottom_right);
2853 }
2854 path.line_to(next_top_right + curve_width);
2855 if self.corner_radius > 0. {
2856 path.curve_to(next_top_right + curve_height, next_top_right);
2857 }
2858 }
2859 Ordering::Greater => {
2860 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2861 path.line_to(bottom_right - curve_height);
2862 if self.corner_radius > 0. {
2863 path.curve_to(bottom_right + curve_width, bottom_right);
2864 }
2865 path.line_to(next_top_right - curve_width);
2866 if self.corner_radius > 0. {
2867 path.curve_to(next_top_right + curve_height, next_top_right);
2868 }
2869 }
2870 }
2871 } else {
2872 let curve_width = curve_width(line.start_x, line.end_x);
2873 path.line_to(bottom_right - curve_height);
2874 if self.corner_radius > 0. {
2875 path.curve_to(bottom_right - curve_width, bottom_right);
2876 }
2877
2878 let bottom_left = vec2f(line.start_x, bottom_right.y());
2879 path.line_to(bottom_left + curve_width);
2880 if self.corner_radius > 0. {
2881 path.curve_to(bottom_left - curve_height, bottom_left);
2882 }
2883 }
2884 }
2885
2886 if first_line.start_x > last_line.start_x {
2887 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2888 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2889 path.line_to(second_top_left + curve_height);
2890 if self.corner_radius > 0. {
2891 path.curve_to(second_top_left + curve_width, second_top_left);
2892 }
2893 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2894 path.line_to(first_bottom_left - curve_width);
2895 if self.corner_radius > 0. {
2896 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2897 }
2898 }
2899
2900 path.line_to(first_top_left + curve_height);
2901 if self.corner_radius > 0. {
2902 path.curve_to(first_top_left + top_curve_width, first_top_left);
2903 }
2904 path.line_to(first_top_right - top_curve_width);
2905
2906 scene.push_path(path.build(self.color, Some(bounds)));
2907 }
2908}
2909
2910fn position_to_display_point(
2911 position: Vector2F,
2912 text_bounds: RectF,
2913 position_map: &PositionMap,
2914) -> Option<DisplayPoint> {
2915 if text_bounds.contains_point(position) {
2916 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2917 if point == target_point {
2918 Some(point)
2919 } else {
2920 None
2921 }
2922 } else {
2923 None
2924 }
2925}
2926
2927fn range_to_bounds(
2928 range: &Range<DisplayPoint>,
2929 content_origin: Vector2F,
2930 scroll_left: f32,
2931 scroll_top: f32,
2932 visible_row_range: &Range<u32>,
2933 line_end_overshoot: f32,
2934 position_map: &PositionMap,
2935) -> impl Iterator<Item = RectF> {
2936 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2937
2938 if range.start == range.end {
2939 return bounds.into_iter();
2940 }
2941
2942 let start_row = visible_row_range.start;
2943 let end_row = visible_row_range.end;
2944
2945 let row_range = if range.end.column() == 0 {
2946 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2947 } else {
2948 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2949 };
2950
2951 let first_y =
2952 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2953
2954 for (idx, row) in row_range.enumerate() {
2955 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2956
2957 let start_x = if row == range.start.row() {
2958 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2959 - scroll_left
2960 } else {
2961 content_origin.x() - scroll_left
2962 };
2963
2964 let end_x = if row == range.end.row() {
2965 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2966 } else {
2967 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2968 };
2969
2970 bounds.push(RectF::from_points(
2971 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2972 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2973 ))
2974 }
2975
2976 bounds.into_iter()
2977}
2978
2979pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2980 delta.powf(1.5) / 100.0
2981}
2982
2983fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2984 delta.powf(1.2) / 300.0
2985}
2986
2987#[cfg(test)]
2988mod tests {
2989 use super::*;
2990 use crate::{
2991 display_map::{BlockDisposition, BlockProperties},
2992 editor_tests::{init_test, update_test_language_settings},
2993 Editor, MultiBuffer,
2994 };
2995 use gpui::TestAppContext;
2996 use language::language_settings;
2997 use log::info;
2998 use std::{num::NonZeroU32, sync::Arc};
2999 use util::test::sample_text;
3000
3001 #[gpui::test]
3002 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3003 init_test(cx, |_| {});
3004
3005 let (_, editor) = cx.add_window(|cx| {
3006 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3007 Editor::new(EditorMode::Full, buffer, None, None, cx)
3008 });
3009 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3010
3011 let layouts = editor.update(cx, |editor, cx| {
3012 let snapshot = editor.snapshot(cx);
3013 element
3014 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
3015 .0
3016 });
3017 assert_eq!(layouts.len(), 6);
3018 }
3019
3020 #[gpui::test]
3021 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3022 init_test(cx, |_| {});
3023
3024 let (_, editor) = cx.add_window(|cx| {
3025 let buffer = MultiBuffer::build_simple("", cx);
3026 Editor::new(EditorMode::Full, buffer, None, None, cx)
3027 });
3028
3029 editor.update(cx, |editor, cx| {
3030 editor.set_placeholder_text("hello", cx);
3031 editor.insert_blocks(
3032 [BlockProperties {
3033 style: BlockStyle::Fixed,
3034 disposition: BlockDisposition::Above,
3035 height: 3,
3036 position: Anchor::min(),
3037 render: Arc::new(|_| Empty::new().into_any()),
3038 }],
3039 None,
3040 cx,
3041 );
3042
3043 // Blur the editor so that it displays placeholder text.
3044 cx.blur();
3045 });
3046
3047 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3048 let (size, mut state) = editor.update(cx, |editor, cx| {
3049 let mut new_parents = Default::default();
3050 let mut notify_views_if_parents_change = Default::default();
3051 let mut layout_cx = LayoutContext::new(
3052 cx,
3053 &mut new_parents,
3054 &mut notify_views_if_parents_change,
3055 false,
3056 );
3057 element.layout(
3058 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3059 editor,
3060 &mut layout_cx,
3061 )
3062 });
3063
3064 assert_eq!(state.position_map.line_layouts.len(), 4);
3065 assert_eq!(
3066 state
3067 .line_number_layouts
3068 .iter()
3069 .map(Option::is_some)
3070 .collect::<Vec<_>>(),
3071 &[false, false, false, true]
3072 );
3073
3074 // Don't panic.
3075 let mut scene = SceneBuilder::new(1.0);
3076 let bounds = RectF::new(Default::default(), size);
3077 editor.update(cx, |editor, cx| {
3078 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3079 });
3080 }
3081
3082 #[gpui::test]
3083 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3084 const TAB_SIZE: u32 = 4;
3085
3086 let input_text = "\t \t|\t| a b";
3087 let expected_invisibles = vec![
3088 Invisible::Tab {
3089 line_start_offset: 0,
3090 },
3091 Invisible::Whitespace {
3092 line_offset: TAB_SIZE as usize,
3093 },
3094 Invisible::Tab {
3095 line_start_offset: TAB_SIZE as usize + 1,
3096 },
3097 Invisible::Tab {
3098 line_start_offset: TAB_SIZE as usize * 2 + 1,
3099 },
3100 Invisible::Whitespace {
3101 line_offset: TAB_SIZE as usize * 3 + 1,
3102 },
3103 Invisible::Whitespace {
3104 line_offset: TAB_SIZE as usize * 3 + 3,
3105 },
3106 ];
3107 assert_eq!(
3108 expected_invisibles.len(),
3109 input_text
3110 .chars()
3111 .filter(|initial_char| initial_char.is_whitespace())
3112 .count(),
3113 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3114 );
3115
3116 init_test(cx, |s| {
3117 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3118 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3119 });
3120
3121 let actual_invisibles =
3122 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3123
3124 assert_eq!(expected_invisibles, actual_invisibles);
3125 }
3126
3127 #[gpui::test]
3128 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3129 init_test(cx, |s| {
3130 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3131 s.defaults.tab_size = NonZeroU32::new(4);
3132 });
3133
3134 for editor_mode_without_invisibles in [
3135 EditorMode::SingleLine,
3136 EditorMode::AutoHeight { max_lines: 100 },
3137 ] {
3138 let invisibles = collect_invisibles_from_new_editor(
3139 cx,
3140 editor_mode_without_invisibles,
3141 "\t\t\t| | a b",
3142 500.0,
3143 );
3144 assert!(invisibles.is_empty(),
3145 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3146 }
3147 }
3148
3149 #[gpui::test]
3150 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3151 let tab_size = 4;
3152 let input_text = "a\tbcd ".repeat(9);
3153 let repeated_invisibles = [
3154 Invisible::Tab {
3155 line_start_offset: 1,
3156 },
3157 Invisible::Whitespace {
3158 line_offset: tab_size as usize + 3,
3159 },
3160 Invisible::Whitespace {
3161 line_offset: tab_size as usize + 4,
3162 },
3163 Invisible::Whitespace {
3164 line_offset: tab_size as usize + 5,
3165 },
3166 ];
3167 let expected_invisibles = std::iter::once(repeated_invisibles)
3168 .cycle()
3169 .take(9)
3170 .flatten()
3171 .collect::<Vec<_>>();
3172 assert_eq!(
3173 expected_invisibles.len(),
3174 input_text
3175 .chars()
3176 .filter(|initial_char| initial_char.is_whitespace())
3177 .count(),
3178 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3179 );
3180 info!("Expected invisibles: {expected_invisibles:?}");
3181
3182 init_test(cx, |_| {});
3183
3184 // Put the same string with repeating whitespace pattern into editors of various size,
3185 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3186 let resize_step = 10.0;
3187 let mut editor_width = 200.0;
3188 while editor_width <= 1000.0 {
3189 update_test_language_settings(cx, |s| {
3190 s.defaults.tab_size = NonZeroU32::new(tab_size);
3191 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3192 s.defaults.preferred_line_length = Some(editor_width as u32);
3193 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3194 });
3195
3196 let actual_invisibles =
3197 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3198
3199 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3200 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3201 let mut i = 0;
3202 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3203 i = actual_index;
3204 match expected_invisibles.get(i) {
3205 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3206 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3207 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3208 _ => {
3209 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3210 }
3211 },
3212 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3213 }
3214 }
3215 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3216 assert!(
3217 missing_expected_invisibles.is_empty(),
3218 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3219 );
3220
3221 editor_width += resize_step;
3222 }
3223 }
3224
3225 fn collect_invisibles_from_new_editor(
3226 cx: &mut TestAppContext,
3227 editor_mode: EditorMode,
3228 input_text: &str,
3229 editor_width: f32,
3230 ) -> Vec<Invisible> {
3231 info!(
3232 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3233 );
3234 let (_, editor) = cx.add_window(|cx| {
3235 let buffer = MultiBuffer::build_simple(&input_text, cx);
3236 Editor::new(editor_mode, buffer, None, None, cx)
3237 });
3238
3239 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3240 let (_, layout_state) = editor.update(cx, |editor, cx| {
3241 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3242 editor.set_wrap_width(Some(editor_width), cx);
3243
3244 let mut new_parents = Default::default();
3245 let mut notify_views_if_parents_change = Default::default();
3246 let mut layout_cx = LayoutContext::new(
3247 cx,
3248 &mut new_parents,
3249 &mut notify_views_if_parents_change,
3250 false,
3251 );
3252 element.layout(
3253 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3254 editor,
3255 &mut layout_cx,
3256 )
3257 });
3258
3259 layout_state
3260 .position_map
3261 .line_layouts
3262 .iter()
3263 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3264 .flatten()
3265 .cloned()
3266 .collect()
3267 }
3268}