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 update_inlay_link_and_hover_points, GoToDefinitionTrigger,
17 },
18 mouse_context_menu, EditorSettings, EditorStyle, GutterHover, UnfoldAt,
19};
20use clock::ReplicaId;
21use collections::{BTreeMap, HashMap};
22use git::diff::DiffHunkStatus;
23use gpui::{
24 color::Color,
25 elements::*,
26 fonts::{HighlightStyle, TextStyle, Underline},
27 geometry::{
28 rect::RectF,
29 vector::{vec2f, Vector2F},
30 PathBuilder,
31 },
32 json::{self, ToJson},
33 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
34 text_layout::{self, Line, RunStyle, TextLayoutCache},
35 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
36 MouseRegion, PaintContext, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
37};
38use itertools::Itertools;
39use json::json;
40use language::{
41 language_settings::ShowWhitespaceSetting, Bias, CursorShape, DiagnosticSeverity, OffsetUtf16,
42 Selection,
43};
44use project::{
45 project_settings::{GitGutterSetting, ProjectSettings},
46 ProjectPath,
47};
48use smallvec::SmallVec;
49use std::{
50 borrow::Cow,
51 cmp::{self, Ordering},
52 fmt::Write,
53 iter,
54 ops::Range,
55 sync::Arc,
56};
57use text::Point;
58use workspace::item::Item;
59
60enum FoldMarkers {}
61
62struct SelectionLayout {
63 head: DisplayPoint,
64 cursor_shape: CursorShape,
65 is_newest: bool,
66 is_local: bool,
67 range: Range<DisplayPoint>,
68 active_rows: Range<u32>,
69}
70
71impl SelectionLayout {
72 fn new<T: ToPoint + ToDisplayPoint + Clone>(
73 selection: Selection<T>,
74 line_mode: bool,
75 cursor_shape: CursorShape,
76 map: &DisplaySnapshot,
77 is_newest: bool,
78 is_local: bool,
79 ) -> Self {
80 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
81 let display_selection = point_selection.map(|p| p.to_display_point(map));
82 let mut range = display_selection.range();
83 let mut head = display_selection.head();
84 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
85 ..map.next_line_boundary(point_selection.end).1.row();
86
87 // vim visual line mode
88 if line_mode {
89 let point_range = map.expand_to_line(point_selection.range());
90 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
91 }
92
93 // any vim visual mode (including line mode)
94 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
95 if head.column() > 0 {
96 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
97 } else if head.row() > 0 && head != map.max_point() {
98 head = map.clip_point(
99 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
100 Bias::Left,
101 );
102 // updating range.end is a no-op unless you're cursor is
103 // on the newline containing a multi-buffer divider
104 // in which case the clip_point may have moved the head up
105 // an additional row.
106 range.end = DisplayPoint::new(head.row() + 1, 0);
107 active_rows.end = head.row();
108 }
109 }
110
111 Self {
112 head,
113 cursor_shape,
114 is_newest,
115 is_local,
116 range,
117 active_rows,
118 }
119 }
120}
121
122pub struct EditorElement {
123 style: Arc<EditorStyle>,
124}
125
126impl EditorElement {
127 pub fn new(style: EditorStyle) -> Self {
128 Self {
129 style: Arc::new(style),
130 }
131 }
132
133 fn attach_mouse_handlers(
134 scene: &mut SceneBuilder,
135 position_map: &Arc<PositionMap>,
136 has_popovers: bool,
137 visible_bounds: RectF,
138 text_bounds: RectF,
139 gutter_bounds: RectF,
140 bounds: RectF,
141 cx: &mut ViewContext<Editor>,
142 ) {
143 enum EditorElementMouseHandlers {}
144 scene.push_mouse_region(
145 MouseRegion::new::<EditorElementMouseHandlers>(
146 cx.view_id(),
147 cx.view_id(),
148 visible_bounds,
149 )
150 .on_down(MouseButton::Left, {
151 let position_map = position_map.clone();
152 move |event, editor, cx| {
153 if !Self::mouse_down(
154 editor,
155 event.platform_event,
156 position_map.as_ref(),
157 text_bounds,
158 gutter_bounds,
159 cx,
160 ) {
161 cx.propagate_event();
162 }
163 }
164 })
165 .on_down(MouseButton::Right, {
166 let position_map = position_map.clone();
167 move |event, editor, cx| {
168 if !Self::mouse_right_down(
169 editor,
170 event.position,
171 position_map.as_ref(),
172 text_bounds,
173 cx,
174 ) {
175 cx.propagate_event();
176 }
177 }
178 })
179 .on_up(MouseButton::Left, {
180 let position_map = position_map.clone();
181 move |event, editor, cx| {
182 if !Self::mouse_up(
183 editor,
184 event.position,
185 event.cmd,
186 event.shift,
187 event.alt,
188 position_map.as_ref(),
189 text_bounds,
190 cx,
191 ) {
192 cx.propagate_event()
193 }
194 }
195 })
196 .on_drag(MouseButton::Left, {
197 let position_map = position_map.clone();
198 move |event, editor, cx| {
199 if event.end {
200 return;
201 }
202
203 if !Self::mouse_dragged(
204 editor,
205 event.platform_event,
206 position_map.as_ref(),
207 text_bounds,
208 cx,
209 ) {
210 cx.propagate_event()
211 }
212 }
213 })
214 .on_move({
215 let position_map = position_map.clone();
216 move |event, editor, cx| {
217 if !Self::mouse_moved(
218 editor,
219 event.platform_event,
220 &position_map,
221 text_bounds,
222 cx,
223 ) {
224 cx.propagate_event()
225 }
226 }
227 })
228 .on_move_out(move |_, editor: &mut Editor, cx| {
229 if has_popovers {
230 hide_hover(editor, cx);
231 }
232 })
233 .on_scroll({
234 let position_map = position_map.clone();
235 move |event, editor, cx| {
236 if !Self::scroll(
237 editor,
238 event.position,
239 *event.delta.raw(),
240 event.delta.precise(),
241 &position_map,
242 bounds,
243 cx,
244 ) {
245 cx.propagate_event()
246 }
247 }
248 }),
249 );
250
251 enum GutterHandlers {}
252 scene.push_mouse_region(
253 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
254 .on_hover(|hover, editor: &mut Editor, cx| {
255 editor.gutter_hover(
256 &GutterHover {
257 hovered: hover.started,
258 },
259 cx,
260 );
261 }),
262 )
263 }
264
265 fn mouse_down(
266 editor: &mut Editor,
267 MouseButtonEvent {
268 position,
269 modifiers:
270 Modifiers {
271 shift,
272 ctrl,
273 alt,
274 cmd,
275 ..
276 },
277 mut click_count,
278 ..
279 }: MouseButtonEvent,
280 position_map: &PositionMap,
281 text_bounds: RectF,
282 gutter_bounds: RectF,
283 cx: &mut EventContext<Editor>,
284 ) -> bool {
285 if gutter_bounds.contains_point(position) {
286 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
287 } else if !text_bounds.contains_point(position) {
288 return false;
289 }
290
291 let point_for_position = position_map.point_for_position(text_bounds, position);
292 let position = point_for_position.previous_valid;
293 if shift && alt {
294 editor.select(
295 SelectPhase::BeginColumnar {
296 position,
297 goal_column: point_for_position.exact_unclipped.column(),
298 },
299 cx,
300 );
301 } else if shift && !ctrl && !alt && !cmd {
302 editor.select(
303 SelectPhase::Extend {
304 position,
305 click_count,
306 },
307 cx,
308 );
309 } else {
310 editor.select(
311 SelectPhase::Begin {
312 position,
313 add: alt,
314 click_count,
315 },
316 cx,
317 );
318 }
319
320 true
321 }
322
323 fn mouse_right_down(
324 editor: &mut Editor,
325 position: Vector2F,
326 position_map: &PositionMap,
327 text_bounds: RectF,
328 cx: &mut EventContext<Editor>,
329 ) -> bool {
330 if !text_bounds.contains_point(position) {
331 return false;
332 }
333 let point_for_position = position_map.point_for_position(text_bounds, position);
334 mouse_context_menu::deploy_context_menu(
335 editor,
336 position,
337 point_for_position.previous_valid,
338 cx,
339 );
340 true
341 }
342
343 fn mouse_up(
344 editor: &mut Editor,
345 position: Vector2F,
346 cmd: bool,
347 shift: bool,
348 alt: bool,
349 position_map: &PositionMap,
350 text_bounds: RectF,
351 cx: &mut EventContext<Editor>,
352 ) -> bool {
353 let end_selection = editor.has_pending_selection();
354 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
355
356 if end_selection {
357 editor.select(SelectPhase::End, cx);
358 }
359
360 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
361 let point = position_map.point_for_position(text_bounds, position);
362 let could_be_inlay = point.as_valid().is_none();
363 if shift || could_be_inlay {
364 go_to_fetched_type_definition(editor, point, alt, cx);
365 } else {
366 go_to_fetched_definition(editor, point, alt, cx);
367 }
368
369 return true;
370 }
371
372 end_selection
373 }
374
375 fn mouse_dragged(
376 editor: &mut Editor,
377 MouseMovedEvent {
378 modifiers: Modifiers { cmd, shift, .. },
379 position,
380 ..
381 }: MouseMovedEvent,
382 position_map: &PositionMap,
383 text_bounds: RectF,
384 cx: &mut EventContext<Editor>,
385 ) -> bool {
386 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
387 // Don't trigger hover popover if mouse is hovering over context menu
388 let point = if text_bounds.contains_point(position) {
389 position_map
390 .point_for_position(text_bounds, position)
391 .as_valid()
392 } else {
393 None
394 };
395
396 update_go_to_definition_link(
397 editor,
398 point
399 .map(GoToDefinitionTrigger::Text)
400 .unwrap_or(GoToDefinitionTrigger::None),
401 cmd,
402 shift,
403 cx,
404 );
405
406 if editor.has_pending_selection() {
407 let mut scroll_delta = Vector2F::zero();
408
409 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
410 let top = text_bounds.origin_y() + vertical_margin;
411 let bottom = text_bounds.lower_left().y() - vertical_margin;
412 if position.y() < top {
413 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
414 }
415 if position.y() > bottom {
416 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
417 }
418
419 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
420 let left = text_bounds.origin_x() + horizontal_margin;
421 let right = text_bounds.upper_right().x() - horizontal_margin;
422 if position.x() < left {
423 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
424 left - position.x(),
425 ))
426 }
427 if position.x() > right {
428 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
429 position.x() - right,
430 ))
431 }
432
433 let point_for_position = position_map.point_for_position(text_bounds, position);
434
435 editor.select(
436 SelectPhase::Update {
437 position: point_for_position.previous_valid,
438 goal_column: point_for_position.exact_unclipped.column(),
439 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
440 .clamp(Vector2F::zero(), position_map.scroll_max),
441 },
442 cx,
443 );
444 hover_at(editor, point, cx);
445 true
446 } else {
447 hover_at(editor, point, cx);
448 false
449 }
450 }
451
452 fn mouse_moved(
453 editor: &mut Editor,
454 MouseMovedEvent {
455 modifiers: Modifiers { shift, cmd, .. },
456 position,
457 ..
458 }: MouseMovedEvent,
459 position_map: &PositionMap,
460 text_bounds: RectF,
461 cx: &mut ViewContext<Editor>,
462 ) -> bool {
463 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
464 // Don't trigger hover popover if mouse is hovering over context menu
465 if text_bounds.contains_point(position) {
466 let point_for_position = position_map.point_for_position(text_bounds, position);
467 match point_for_position.as_valid() {
468 Some(point) => {
469 update_go_to_definition_link(
470 editor,
471 GoToDefinitionTrigger::Text(point),
472 cmd,
473 shift,
474 cx,
475 );
476 hover_at(editor, Some(point), cx);
477 }
478 None => {
479 update_inlay_link_and_hover_points(
480 &position_map.snapshot,
481 point_for_position,
482 editor,
483 cmd,
484 shift,
485 cx,
486 );
487 }
488 }
489 } else {
490 update_go_to_definition_link(editor, GoToDefinitionTrigger::None, cmd, shift, cx);
491 hover_at(editor, None, cx);
492 }
493
494 true
495 }
496
497 fn scroll(
498 editor: &mut Editor,
499 position: Vector2F,
500 mut delta: Vector2F,
501 precise: bool,
502 position_map: &PositionMap,
503 bounds: RectF,
504 cx: &mut ViewContext<Editor>,
505 ) -> bool {
506 if !bounds.contains_point(position) {
507 return false;
508 }
509
510 let line_height = position_map.line_height;
511 let max_glyph_width = position_map.em_width;
512
513 let axis = if precise {
514 //Trackpad
515 position_map.snapshot.ongoing_scroll.filter(&mut delta)
516 } else {
517 //Not trackpad
518 delta *= vec2f(max_glyph_width, line_height);
519 None //Resets ongoing scroll
520 };
521
522 let scroll_position = position_map.snapshot.scroll_position();
523 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
524 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
525 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
526 editor.scroll(scroll_position, axis, cx);
527
528 true
529 }
530
531 fn paint_background(
532 &self,
533 scene: &mut SceneBuilder,
534 gutter_bounds: RectF,
535 text_bounds: RectF,
536 layout: &LayoutState,
537 ) {
538 let bounds = gutter_bounds.union_rect(text_bounds);
539 let scroll_top =
540 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
541 scene.push_quad(Quad {
542 bounds: gutter_bounds,
543 background: Some(self.style.gutter_background),
544 border: Border::new(0., Color::transparent_black()),
545 corner_radii: Default::default(),
546 });
547 scene.push_quad(Quad {
548 bounds: text_bounds,
549 background: Some(self.style.background),
550 border: Border::new(0., Color::transparent_black()),
551 corner_radii: Default::default(),
552 });
553
554 if let EditorMode::Full = layout.mode {
555 let mut active_rows = layout.active_rows.iter().peekable();
556 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
557 let mut end_row = *start_row;
558 while active_rows.peek().map_or(false, |r| {
559 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
560 }) {
561 active_rows.next().unwrap();
562 end_row += 1;
563 }
564
565 if !contains_non_empty_selection {
566 let origin = vec2f(
567 bounds.origin_x(),
568 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
569 - scroll_top,
570 );
571 let size = vec2f(
572 bounds.width(),
573 layout.position_map.line_height * (end_row - start_row + 1) as f32,
574 );
575 scene.push_quad(Quad {
576 bounds: RectF::new(origin, size),
577 background: Some(self.style.active_line_background),
578 border: Border::default(),
579 corner_radii: Default::default(),
580 });
581 }
582 }
583
584 if let Some(highlighted_rows) = &layout.highlighted_rows {
585 let origin = vec2f(
586 bounds.origin_x(),
587 bounds.origin_y()
588 + (layout.position_map.line_height * highlighted_rows.start as f32)
589 - scroll_top,
590 );
591 let size = vec2f(
592 bounds.width(),
593 layout.position_map.line_height * highlighted_rows.len() as f32,
594 );
595 scene.push_quad(Quad {
596 bounds: RectF::new(origin, size),
597 background: Some(self.style.highlighted_line_background),
598 border: Border::default(),
599 corner_radii: Default::default(),
600 });
601 }
602
603 let scroll_left =
604 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
605
606 for (wrap_position, active) in layout.wrap_guides.iter() {
607 let x =
608 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
609 - scroll_left;
610
611 if x < text_bounds.origin_x()
612 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
613 {
614 continue;
615 }
616
617 let color = if *active {
618 self.style.active_wrap_guide
619 } else {
620 self.style.wrap_guide
621 };
622 scene.push_quad(Quad {
623 bounds: RectF::new(
624 vec2f(x, text_bounds.origin_y()),
625 vec2f(1., text_bounds.height()),
626 ),
627 background: Some(color),
628 border: Border::new(0., Color::transparent_black()),
629 corner_radii: Default::default(),
630 });
631 }
632 }
633 }
634
635 fn paint_gutter(
636 &mut self,
637 scene: &mut SceneBuilder,
638 bounds: RectF,
639 visible_bounds: RectF,
640 layout: &mut LayoutState,
641 editor: &mut Editor,
642 cx: &mut PaintContext<Editor>,
643 ) {
644 let line_height = layout.position_map.line_height;
645
646 let scroll_position = layout.position_map.snapshot.scroll_position();
647 let scroll_top = scroll_position.y() * line_height;
648
649 let show_gutter = matches!(
650 settings::get::<ProjectSettings>(cx).git.git_gutter,
651 Some(GitGutterSetting::TrackedFiles)
652 );
653
654 if show_gutter {
655 Self::paint_diff_hunks(scene, bounds, layout, cx);
656 }
657
658 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
659 if let Some(line) = line {
660 let line_origin = bounds.origin()
661 + vec2f(
662 bounds.width() - line.width() - layout.gutter_padding,
663 ix as f32 * line_height - (scroll_top % line_height),
664 );
665
666 line.paint(scene, line_origin, visible_bounds, line_height, cx);
667 }
668 }
669
670 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
671 if let Some(indicator) = fold_indicator.as_mut() {
672 let position = vec2f(
673 bounds.width() - layout.gutter_padding,
674 ix as f32 * line_height - (scroll_top % line_height),
675 );
676 let centering_offset = vec2f(
677 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
678 (line_height - indicator.size().y()) / 2.,
679 );
680
681 let indicator_origin = bounds.origin() + position + centering_offset;
682
683 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
684 }
685 }
686
687 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
688 let mut x = 0.;
689 let mut y = *row as f32 * line_height - scroll_top;
690 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
691 y += (line_height - indicator.size().y()) / 2.;
692 indicator.paint(
693 scene,
694 bounds.origin() + vec2f(x, y),
695 visible_bounds,
696 editor,
697 cx,
698 );
699 }
700 }
701
702 fn paint_diff_hunks(
703 scene: &mut SceneBuilder,
704 bounds: RectF,
705 layout: &mut LayoutState,
706 cx: &mut ViewContext<Editor>,
707 ) {
708 let diff_style = &theme::current(cx).editor.diff.clone();
709 let line_height = layout.position_map.line_height;
710
711 let scroll_position = layout.position_map.snapshot.scroll_position();
712 let scroll_top = scroll_position.y() * line_height;
713
714 for hunk in &layout.display_hunks {
715 let (display_row_range, status) = match hunk {
716 //TODO: This rendering is entirely a horrible hack
717 &DisplayDiffHunk::Folded { display_row: row } => {
718 let start_y = row as f32 * line_height - scroll_top;
719 let end_y = start_y + line_height;
720
721 let width = diff_style.removed_width_em * line_height;
722 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
723 let highlight_size = vec2f(width * 2., end_y - start_y);
724 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
725
726 scene.push_quad(Quad {
727 bounds: highlight_bounds,
728 background: Some(diff_style.modified),
729 border: Border::new(0., Color::transparent_black()),
730 corner_radii: (1. * line_height).into(),
731 });
732
733 continue;
734 }
735
736 DisplayDiffHunk::Unfolded {
737 display_row_range,
738 status,
739 } => (display_row_range, status),
740 };
741
742 let color = match status {
743 DiffHunkStatus::Added => diff_style.inserted,
744 DiffHunkStatus::Modified => diff_style.modified,
745
746 //TODO: This rendering is entirely a horrible hack
747 DiffHunkStatus::Removed => {
748 let row = display_row_range.start;
749
750 let offset = line_height / 2.;
751 let start_y = row as f32 * line_height - offset - scroll_top;
752 let end_y = start_y + line_height;
753
754 let width = diff_style.removed_width_em * line_height;
755 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
756 let highlight_size = vec2f(width * 2., end_y - start_y);
757 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
758
759 scene.push_quad(Quad {
760 bounds: highlight_bounds,
761 background: Some(diff_style.deleted),
762 border: Border::new(0., Color::transparent_black()),
763 corner_radii: (1. * line_height).into(),
764 });
765
766 continue;
767 }
768 };
769
770 let start_row = display_row_range.start;
771 let end_row = display_row_range.end;
772
773 let start_y = start_row as f32 * line_height - scroll_top;
774 let end_y = end_row as f32 * line_height - scroll_top;
775
776 let width = diff_style.width_em * line_height;
777 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
778 let highlight_size = vec2f(width * 2., end_y - start_y);
779 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
780
781 scene.push_quad(Quad {
782 bounds: highlight_bounds,
783 background: Some(color),
784 border: Border::new(0., Color::transparent_black()),
785 corner_radii: (diff_style.corner_radius * line_height).into(),
786 });
787 }
788 }
789
790 fn paint_text(
791 &mut self,
792 scene: &mut SceneBuilder,
793 bounds: RectF,
794 visible_bounds: RectF,
795 layout: &mut LayoutState,
796 editor: &mut Editor,
797 cx: &mut PaintContext<Editor>,
798 ) {
799 let style = &self.style;
800 let scroll_position = layout.position_map.snapshot.scroll_position();
801 let start_row = layout.visible_display_row_range.start;
802 let scroll_top = scroll_position.y() * layout.position_map.line_height;
803 let max_glyph_width = layout.position_map.em_width;
804 let scroll_left = scroll_position.x() * max_glyph_width;
805 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
806 let line_end_overshoot = 0.15 * layout.position_map.line_height;
807 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
808
809 scene.push_layer(Some(bounds));
810
811 scene.push_cursor_region(CursorRegion {
812 bounds,
813 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
814 CursorStyle::PointingHand
815 } else {
816 CursorStyle::IBeam
817 },
818 });
819
820 let fold_corner_radius =
821 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
822 for (id, range, color) in layout.fold_ranges.iter() {
823 self.paint_highlighted_range(
824 scene,
825 range.clone(),
826 *color,
827 fold_corner_radius,
828 fold_corner_radius * 2.,
829 layout,
830 content_origin,
831 scroll_top,
832 scroll_left,
833 bounds,
834 );
835
836 for bound in range_to_bounds(
837 &range,
838 content_origin,
839 scroll_left,
840 scroll_top,
841 &layout.visible_display_row_range,
842 line_end_overshoot,
843 &layout.position_map,
844 ) {
845 scene.push_cursor_region(CursorRegion {
846 bounds: bound,
847 style: CursorStyle::PointingHand,
848 });
849
850 let display_row = range.start.row();
851
852 let buffer_row = DisplayPoint::new(display_row, 0)
853 .to_point(&layout.position_map.snapshot.display_snapshot)
854 .row;
855
856 scene.push_mouse_region(
857 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
858 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
859 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
860 })
861 .with_notify_on_hover(true)
862 .with_notify_on_click(true),
863 )
864 }
865 }
866
867 for (range, color) in &layout.highlighted_ranges {
868 self.paint_highlighted_range(
869 scene,
870 range.clone(),
871 *color,
872 0.,
873 line_end_overshoot,
874 layout,
875 content_origin,
876 scroll_top,
877 scroll_left,
878 bounds,
879 );
880 }
881
882 let mut cursors = SmallVec::<[Cursor; 32]>::new();
883 let corner_radius = 0.15 * layout.position_map.line_height;
884 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
885
886 for (replica_id, selections) in &layout.selections {
887 let replica_id = *replica_id;
888 let selection_style = if let Some(replica_id) = replica_id {
889 style.replica_selection_style(replica_id)
890 } else {
891 &style.absent_selection
892 };
893
894 for selection in selections {
895 self.paint_highlighted_range(
896 scene,
897 selection.range.clone(),
898 selection_style.selection,
899 corner_radius,
900 corner_radius * 2.,
901 layout,
902 content_origin,
903 scroll_top,
904 scroll_left,
905 bounds,
906 );
907
908 if selection.is_local && !selection.range.is_empty() {
909 invisible_display_ranges.push(selection.range.clone());
910 }
911 if !selection.is_local || editor.show_local_cursors(cx) {
912 let cursor_position = selection.head;
913 if layout
914 .visible_display_row_range
915 .contains(&cursor_position.row())
916 {
917 let cursor_row_layout = &layout.position_map.line_layouts
918 [(cursor_position.row() - start_row) as usize]
919 .line;
920 let cursor_column = cursor_position.column() as usize;
921
922 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
923 let mut block_width =
924 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
925 if block_width == 0.0 {
926 block_width = layout.position_map.em_width;
927 }
928 let block_text = if let CursorShape::Block = selection.cursor_shape {
929 layout
930 .position_map
931 .snapshot
932 .chars_at(cursor_position)
933 .next()
934 .and_then(|(character, _)| {
935 let font_id =
936 cursor_row_layout.font_for_index(cursor_column)?;
937 let text = character.to_string();
938
939 Some(cx.text_layout_cache().layout_str(
940 &text,
941 cursor_row_layout.font_size(),
942 &[(
943 text.chars().count(),
944 RunStyle {
945 font_id,
946 color: style.background,
947 underline: Default::default(),
948 },
949 )],
950 ))
951 })
952 } else {
953 None
954 };
955
956 let x = cursor_character_x - scroll_left;
957 let y = cursor_position.row() as f32 * layout.position_map.line_height
958 - scroll_top;
959 if selection.is_newest {
960 editor.pixel_position_of_newest_cursor = Some(vec2f(
961 bounds.origin_x() + x + block_width / 2.,
962 bounds.origin_y() + y + layout.position_map.line_height / 2.,
963 ));
964 }
965 cursors.push(Cursor {
966 color: selection_style.cursor,
967 block_width,
968 origin: vec2f(x, y),
969 line_height: layout.position_map.line_height,
970 shape: selection.cursor_shape,
971 block_text,
972 });
973 }
974 }
975 }
976 }
977
978 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
979 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
980 let row = start_row + ix as u32;
981 line_with_invisibles.draw(
982 layout,
983 row,
984 scroll_top,
985 scene,
986 content_origin,
987 scroll_left,
988 visible_text_bounds,
989 whitespace_setting,
990 &invisible_display_ranges,
991 visible_bounds,
992 cx,
993 )
994 }
995 }
996
997 scene.paint_layer(Some(bounds), |scene| {
998 for cursor in cursors {
999 cursor.paint(scene, content_origin, cx);
1000 }
1001 });
1002
1003 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
1004 scene.push_stacking_context(None, None);
1005 let cursor_row_layout =
1006 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1007 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
1008 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
1009 let mut list_origin = content_origin + vec2f(x, y);
1010 let list_width = context_menu.size().x();
1011 let list_height = context_menu.size().y();
1012
1013 // Snap the right edge of the list to the right edge of the window if
1014 // its horizontal bounds overflow.
1015 if list_origin.x() + list_width > cx.window_size().x() {
1016 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
1017 }
1018
1019 if list_origin.y() + list_height > bounds.max_y() {
1020 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
1021 }
1022
1023 context_menu.paint(
1024 scene,
1025 list_origin,
1026 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1027 editor,
1028 cx,
1029 );
1030
1031 scene.pop_stacking_context();
1032 }
1033
1034 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
1035 scene.push_stacking_context(None, None);
1036
1037 // This is safe because we check on layout whether the required row is available
1038 let hovered_row_layout =
1039 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1040
1041 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1042 // height. This is the size we will use to decide whether to render popovers above or below
1043 // the hovered line.
1044 let first_size = hover_popovers[0].size();
1045 let height_to_reserve = first_size.y()
1046 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1047
1048 // Compute Hovered Point
1049 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1050 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1051 let hovered_point = content_origin + vec2f(x, y);
1052
1053 if hovered_point.y() - height_to_reserve > 0.0 {
1054 // There is enough space above. Render popovers above the hovered point
1055 let mut current_y = hovered_point.y();
1056 for hover_popover in hover_popovers {
1057 let size = hover_popover.size();
1058 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1059
1060 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1061 if x_out_of_bounds < 0.0 {
1062 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1063 }
1064
1065 hover_popover.paint(
1066 scene,
1067 popover_origin,
1068 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1069 editor,
1070 cx,
1071 );
1072
1073 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1074 }
1075 } else {
1076 // There is not enough space above. Render popovers below the hovered point
1077 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1078 for hover_popover in hover_popovers {
1079 let size = hover_popover.size();
1080 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1081
1082 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1083 if x_out_of_bounds < 0.0 {
1084 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1085 }
1086
1087 hover_popover.paint(
1088 scene,
1089 popover_origin,
1090 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1091 editor,
1092 cx,
1093 );
1094
1095 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1096 }
1097 }
1098
1099 scene.pop_stacking_context();
1100 }
1101
1102 scene.pop_layer();
1103 }
1104
1105 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1106 bounds.max_x() - self.style.theme.scrollbar.width
1107 }
1108
1109 fn paint_scrollbar(
1110 &mut self,
1111 scene: &mut SceneBuilder,
1112 bounds: RectF,
1113 layout: &mut LayoutState,
1114 cx: &mut ViewContext<Editor>,
1115 editor: &Editor,
1116 ) {
1117 enum ScrollbarMouseHandlers {}
1118 if layout.mode != EditorMode::Full {
1119 return;
1120 }
1121
1122 let style = &self.style.theme.scrollbar;
1123
1124 let top = bounds.min_y();
1125 let bottom = bounds.max_y();
1126 let right = bounds.max_x();
1127 let left = self.scrollbar_left(&bounds);
1128 let row_range = &layout.scrollbar_row_range;
1129 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1130
1131 let mut height = bounds.height();
1132 let mut first_row_y_offset = 0.0;
1133
1134 // Impose a minimum height on the scrollbar thumb
1135 let row_height = height / max_row;
1136 let min_thumb_height =
1137 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1138 let thumb_height = (row_range.end - row_range.start) * row_height;
1139 if thumb_height < min_thumb_height {
1140 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1141 height -= min_thumb_height - thumb_height;
1142 }
1143
1144 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1145
1146 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1147 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1148 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1149 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1150
1151 if layout.show_scrollbars {
1152 scene.push_quad(Quad {
1153 bounds: track_bounds,
1154 border: style.track.border,
1155 background: style.track.background_color,
1156 ..Default::default()
1157 });
1158 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1159 let theme = theme::current(cx);
1160 let scrollbar_theme = &theme.editor.scrollbar;
1161 if layout.is_singleton && scrollbar_settings.selections {
1162 let start_anchor = Anchor::min();
1163 let end_anchor = Anchor::max();
1164 let color = scrollbar_theme.selections;
1165 let border = Border {
1166 width: 1.,
1167 color: style.thumb.border.color,
1168 overlay: false,
1169 top: false,
1170 right: true,
1171 bottom: false,
1172 left: true,
1173 };
1174 let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1175 let start_y = y_for_row(start.row() as f32);
1176 let mut end_y = y_for_row(end.row() as f32);
1177 if end_y - start_y < 1. {
1178 end_y = start_y + 1.;
1179 }
1180 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1181
1182 scene.push_quad(Quad {
1183 bounds,
1184 background: Some(color),
1185 border,
1186 corner_radii: style.thumb.corner_radii.into(),
1187 })
1188 };
1189 let background_ranges = editor
1190 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1191 start_anchor..end_anchor,
1192 &layout.position_map.snapshot,
1193 50000,
1194 );
1195 for row in background_ranges {
1196 let start = row.start();
1197 let end = row.end();
1198 push_region(*start, *end);
1199 }
1200 }
1201
1202 if layout.is_singleton && scrollbar_settings.git_diff {
1203 let diff_style = scrollbar_theme.git.clone();
1204 for hunk in layout
1205 .position_map
1206 .snapshot
1207 .buffer_snapshot
1208 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1209 {
1210 let start_display = Point::new(hunk.buffer_range.start, 0)
1211 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1212 let end_display = Point::new(hunk.buffer_range.end, 0)
1213 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1214 let start_y = y_for_row(start_display.row() as f32);
1215 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1216 y_for_row((end_display.row() + 1) as f32)
1217 } else {
1218 y_for_row((end_display.row()) as f32)
1219 };
1220
1221 if end_y - start_y < 1. {
1222 end_y = start_y + 1.;
1223 }
1224 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1225
1226 let color = match hunk.status() {
1227 DiffHunkStatus::Added => diff_style.inserted,
1228 DiffHunkStatus::Modified => diff_style.modified,
1229 DiffHunkStatus::Removed => diff_style.deleted,
1230 };
1231
1232 let border = Border {
1233 width: 1.,
1234 color: style.thumb.border.color,
1235 overlay: false,
1236 top: false,
1237 right: true,
1238 bottom: false,
1239 left: true,
1240 };
1241
1242 scene.push_quad(Quad {
1243 bounds,
1244 background: Some(color),
1245 border,
1246 corner_radii: style.thumb.corner_radii.into(),
1247 })
1248 }
1249 }
1250
1251 scene.push_quad(Quad {
1252 bounds: thumb_bounds,
1253 border: style.thumb.border,
1254 background: style.thumb.background_color,
1255 corner_radii: style.thumb.corner_radii.into(),
1256 });
1257 }
1258
1259 scene.push_cursor_region(CursorRegion {
1260 bounds: track_bounds,
1261 style: CursorStyle::Arrow,
1262 });
1263 scene.push_mouse_region(
1264 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1265 .on_move(move |event, editor: &mut Editor, cx| {
1266 if event.pressed_button.is_none() {
1267 editor.scroll_manager.show_scrollbar(cx);
1268 }
1269 })
1270 .on_down(MouseButton::Left, {
1271 let row_range = row_range.clone();
1272 move |event, editor: &mut Editor, cx| {
1273 let y = event.position.y();
1274 if y < thumb_top || thumb_bottom < y {
1275 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1276 let top_row = center_row
1277 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1278 let mut position = editor.scroll_position(cx);
1279 position.set_y(top_row as f32);
1280 editor.set_scroll_position(position, cx);
1281 } else {
1282 editor.scroll_manager.show_scrollbar(cx);
1283 }
1284 }
1285 })
1286 .on_drag(MouseButton::Left, {
1287 move |event, editor: &mut Editor, cx| {
1288 if event.end {
1289 return;
1290 }
1291
1292 let y = event.prev_mouse_position.y();
1293 let new_y = event.position.y();
1294 if thumb_top < y && y < thumb_bottom {
1295 let mut position = editor.scroll_position(cx);
1296 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1297 if position.y() < 0.0 {
1298 position.set_y(0.);
1299 }
1300 editor.set_scroll_position(position, cx);
1301 }
1302 }
1303 }),
1304 );
1305 }
1306
1307 #[allow(clippy::too_many_arguments)]
1308 fn paint_highlighted_range(
1309 &self,
1310 scene: &mut SceneBuilder,
1311 range: Range<DisplayPoint>,
1312 color: Color,
1313 corner_radius: f32,
1314 line_end_overshoot: f32,
1315 layout: &LayoutState,
1316 content_origin: Vector2F,
1317 scroll_top: f32,
1318 scroll_left: f32,
1319 bounds: RectF,
1320 ) {
1321 let start_row = layout.visible_display_row_range.start;
1322 let end_row = layout.visible_display_row_range.end;
1323 if range.start != range.end {
1324 let row_range = if range.end.column() == 0 {
1325 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1326 } else {
1327 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1328 };
1329
1330 let highlighted_range = HighlightedRange {
1331 color,
1332 line_height: layout.position_map.line_height,
1333 corner_radius,
1334 start_y: content_origin.y()
1335 + row_range.start as f32 * layout.position_map.line_height
1336 - scroll_top,
1337 lines: row_range
1338 .into_iter()
1339 .map(|row| {
1340 let line_layout =
1341 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1342 HighlightedRangeLine {
1343 start_x: if row == range.start.row() {
1344 content_origin.x()
1345 + line_layout.x_for_index(range.start.column() as usize)
1346 - scroll_left
1347 } else {
1348 content_origin.x() - scroll_left
1349 },
1350 end_x: if row == range.end.row() {
1351 content_origin.x()
1352 + line_layout.x_for_index(range.end.column() as usize)
1353 - scroll_left
1354 } else {
1355 content_origin.x() + line_layout.width() + line_end_overshoot
1356 - scroll_left
1357 },
1358 }
1359 })
1360 .collect(),
1361 };
1362
1363 highlighted_range.paint(bounds, scene);
1364 }
1365 }
1366
1367 fn paint_blocks(
1368 &mut self,
1369 scene: &mut SceneBuilder,
1370 bounds: RectF,
1371 visible_bounds: RectF,
1372 layout: &mut LayoutState,
1373 editor: &mut Editor,
1374 cx: &mut PaintContext<Editor>,
1375 ) {
1376 let scroll_position = layout.position_map.snapshot.scroll_position();
1377 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1378 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1379
1380 for block in &mut layout.blocks {
1381 let mut origin = bounds.origin()
1382 + vec2f(
1383 0.,
1384 block.row as f32 * layout.position_map.line_height - scroll_top,
1385 );
1386 if !matches!(block.style, BlockStyle::Sticky) {
1387 origin += vec2f(-scroll_left, 0.);
1388 }
1389 block
1390 .element
1391 .paint(scene, origin, visible_bounds, editor, cx);
1392 }
1393 }
1394
1395 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1396 let style = &self.style;
1397
1398 cx.text_layout_cache()
1399 .layout_str(
1400 " ".repeat(column).as_str(),
1401 style.text.font_size,
1402 &[(
1403 column,
1404 RunStyle {
1405 font_id: style.text.font_id,
1406 color: Color::black(),
1407 underline: Default::default(),
1408 },
1409 )],
1410 )
1411 .width()
1412 }
1413
1414 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1415 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1416 self.column_pixels(digit_count, cx)
1417 }
1418
1419 //Folds contained in a hunk are ignored apart from shrinking visual size
1420 //If a fold contains any hunks then that fold line is marked as modified
1421 fn layout_git_gutters(
1422 &self,
1423 display_rows: Range<u32>,
1424 snapshot: &EditorSnapshot,
1425 ) -> Vec<DisplayDiffHunk> {
1426 let buffer_snapshot = &snapshot.buffer_snapshot;
1427
1428 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1429 .to_point(snapshot)
1430 .row;
1431 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1432 .to_point(snapshot)
1433 .row;
1434
1435 buffer_snapshot
1436 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1437 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1438 .dedup()
1439 .collect()
1440 }
1441
1442 fn calculate_relative_line_numbers(
1443 &self,
1444 snapshot: &EditorSnapshot,
1445 rows: &Range<u32>,
1446 relative_to: Option<u32>,
1447 ) -> HashMap<u32, u32> {
1448 let mut relative_rows: HashMap<u32, u32> = Default::default();
1449 let Some(relative_to) = relative_to else {
1450 return relative_rows;
1451 };
1452
1453 let start = rows.start.min(relative_to);
1454 let end = rows.end.max(relative_to);
1455
1456 let buffer_rows = snapshot
1457 .buffer_rows(start)
1458 .take(1 + (end - start) as usize)
1459 .collect::<Vec<_>>();
1460
1461 let head_idx = relative_to - start;
1462 let mut delta = 1;
1463 let mut i = head_idx + 1;
1464 while i < buffer_rows.len() as u32 {
1465 if buffer_rows[i as usize].is_some() {
1466 if rows.contains(&(i + start)) {
1467 relative_rows.insert(i + start, delta);
1468 }
1469 delta += 1;
1470 }
1471 i += 1;
1472 }
1473 delta = 1;
1474 i = head_idx.min(buffer_rows.len() as u32 - 1);
1475 while i > 0 && buffer_rows[i as usize].is_none() {
1476 i -= 1;
1477 }
1478
1479 while i > 0 {
1480 i -= 1;
1481 if buffer_rows[i as usize].is_some() {
1482 if rows.contains(&(i + start)) {
1483 relative_rows.insert(i + start, delta);
1484 }
1485 delta += 1;
1486 }
1487 }
1488
1489 relative_rows
1490 }
1491
1492 fn layout_line_numbers(
1493 &self,
1494 rows: Range<u32>,
1495 active_rows: &BTreeMap<u32, bool>,
1496 newest_selection_head: Option<DisplayPoint>,
1497 is_singleton: bool,
1498 snapshot: &EditorSnapshot,
1499 cx: &ViewContext<Editor>,
1500 ) -> (
1501 Vec<Option<text_layout::Line>>,
1502 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1503 ) {
1504 let style = &self.style;
1505 let include_line_numbers = snapshot.mode == EditorMode::Full;
1506 let mut line_number_layouts = Vec::with_capacity(rows.len());
1507 let mut fold_statuses = Vec::with_capacity(rows.len());
1508 let mut line_number = String::new();
1509 let is_relative = settings::get::<EditorSettings>(cx).relative_line_numbers;
1510 let relative_to = if is_relative {
1511 newest_selection_head.map(|head| head.row())
1512 } else {
1513 None
1514 };
1515
1516 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1517
1518 for (ix, row) in snapshot
1519 .buffer_rows(rows.start)
1520 .take((rows.end - rows.start) as usize)
1521 .enumerate()
1522 {
1523 let display_row = rows.start + ix as u32;
1524 let (active, color) = if active_rows.contains_key(&display_row) {
1525 (true, style.line_number_active)
1526 } else {
1527 (false, style.line_number)
1528 };
1529 if let Some(buffer_row) = row {
1530 if include_line_numbers {
1531 line_number.clear();
1532 let default_number = buffer_row + 1;
1533 let number = relative_rows
1534 .get(&(ix as u32 + rows.start))
1535 .unwrap_or(&default_number);
1536 write!(&mut line_number, "{}", number).unwrap();
1537 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1538 &line_number,
1539 style.text.font_size,
1540 &[(
1541 line_number.len(),
1542 RunStyle {
1543 font_id: style.text.font_id,
1544 color,
1545 underline: Default::default(),
1546 },
1547 )],
1548 )));
1549 fold_statuses.push(
1550 is_singleton
1551 .then(|| {
1552 snapshot
1553 .fold_for_line(buffer_row)
1554 .map(|fold_status| (fold_status, buffer_row, active))
1555 })
1556 .flatten(),
1557 )
1558 }
1559 } else {
1560 fold_statuses.push(None);
1561 line_number_layouts.push(None);
1562 }
1563 }
1564
1565 (line_number_layouts, fold_statuses)
1566 }
1567
1568 fn layout_lines(
1569 &mut self,
1570 rows: Range<u32>,
1571 line_number_layouts: &[Option<Line>],
1572 snapshot: &EditorSnapshot,
1573 cx: &ViewContext<Editor>,
1574 ) -> Vec<LineWithInvisibles> {
1575 if rows.start >= rows.end {
1576 return Vec::new();
1577 }
1578
1579 // When the editor is empty and unfocused, then show the placeholder.
1580 if snapshot.is_empty() {
1581 let placeholder_style = self
1582 .style
1583 .placeholder_text
1584 .as_ref()
1585 .unwrap_or(&self.style.text);
1586 let placeholder_text = snapshot.placeholder_text();
1587 let placeholder_lines = placeholder_text
1588 .as_ref()
1589 .map_or("", AsRef::as_ref)
1590 .split('\n')
1591 .skip(rows.start as usize)
1592 .chain(iter::repeat(""))
1593 .take(rows.len());
1594 placeholder_lines
1595 .map(|line| {
1596 cx.text_layout_cache().layout_str(
1597 line,
1598 placeholder_style.font_size,
1599 &[(
1600 line.len(),
1601 RunStyle {
1602 font_id: placeholder_style.font_id,
1603 color: placeholder_style.color,
1604 underline: Default::default(),
1605 },
1606 )],
1607 )
1608 })
1609 .map(|line| LineWithInvisibles {
1610 line,
1611 invisibles: Vec::new(),
1612 })
1613 .collect()
1614 } else {
1615 let style = &self.style;
1616 let chunks = snapshot
1617 .chunks(
1618 rows.clone(),
1619 true,
1620 Some(style.theme.hint),
1621 Some(style.theme.suggestion),
1622 )
1623 .map(|chunk| {
1624 let mut highlight_style = chunk
1625 .syntax_highlight_id
1626 .and_then(|id| id.style(&style.syntax));
1627
1628 if let Some(chunk_highlight) = chunk.highlight_style {
1629 if let Some(highlight_style) = highlight_style.as_mut() {
1630 highlight_style.highlight(chunk_highlight);
1631 } else {
1632 highlight_style = Some(chunk_highlight);
1633 }
1634 }
1635
1636 let mut diagnostic_highlight = HighlightStyle::default();
1637
1638 if chunk.is_unnecessary {
1639 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1640 }
1641
1642 if let Some(severity) = chunk.diagnostic_severity {
1643 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1644 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1645 let diagnostic_style = super::diagnostic_style(severity, true, style);
1646 diagnostic_highlight.underline = Some(Underline {
1647 color: Some(diagnostic_style.message.text.color),
1648 thickness: 1.0.into(),
1649 squiggly: true,
1650 });
1651 }
1652 }
1653
1654 if let Some(highlight_style) = highlight_style.as_mut() {
1655 highlight_style.highlight(diagnostic_highlight);
1656 } else {
1657 highlight_style = Some(diagnostic_highlight);
1658 }
1659
1660 HighlightedChunk {
1661 chunk: chunk.text,
1662 style: highlight_style,
1663 is_tab: chunk.is_tab,
1664 }
1665 });
1666
1667 LineWithInvisibles::from_chunks(
1668 chunks,
1669 &style.text,
1670 cx.text_layout_cache(),
1671 cx.font_cache(),
1672 MAX_LINE_LEN,
1673 rows.len() as usize,
1674 line_number_layouts,
1675 snapshot.mode,
1676 )
1677 }
1678 }
1679
1680 #[allow(clippy::too_many_arguments)]
1681 fn layout_blocks(
1682 &mut self,
1683 rows: Range<u32>,
1684 snapshot: &EditorSnapshot,
1685 editor_width: f32,
1686 scroll_width: f32,
1687 gutter_padding: f32,
1688 gutter_width: f32,
1689 em_width: f32,
1690 text_x: f32,
1691 line_height: f32,
1692 style: &EditorStyle,
1693 line_layouts: &[LineWithInvisibles],
1694 editor: &mut Editor,
1695 cx: &mut LayoutContext<Editor>,
1696 ) -> (f32, Vec<BlockLayout>) {
1697 let mut block_id = 0;
1698 let scroll_x = snapshot.scroll_anchor.offset.x();
1699 let (fixed_blocks, non_fixed_blocks) = snapshot
1700 .blocks_in_range(rows.clone())
1701 .partition::<Vec<_>, _>(|(_, block)| match block {
1702 TransformBlock::ExcerptHeader { .. } => false,
1703 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1704 });
1705 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1706 let mut element = match block {
1707 TransformBlock::Custom(block) => {
1708 let align_to = block
1709 .position()
1710 .to_point(&snapshot.buffer_snapshot)
1711 .to_display_point(snapshot);
1712 let anchor_x = text_x
1713 + if rows.contains(&align_to.row()) {
1714 line_layouts[(align_to.row() - rows.start) as usize]
1715 .line
1716 .x_for_index(align_to.column() as usize)
1717 } else {
1718 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1719 .x_for_index(align_to.column() as usize)
1720 };
1721
1722 block.render(&mut BlockContext {
1723 view_context: cx,
1724 anchor_x,
1725 gutter_padding,
1726 line_height,
1727 scroll_x,
1728 gutter_width,
1729 em_width,
1730 block_id,
1731 })
1732 }
1733 TransformBlock::ExcerptHeader {
1734 id,
1735 buffer,
1736 range,
1737 starts_new_buffer,
1738 ..
1739 } => {
1740 let tooltip_style = theme::current(cx).tooltip.clone();
1741 let include_root = editor
1742 .project
1743 .as_ref()
1744 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1745 .unwrap_or_default();
1746 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1747 let jump_path = ProjectPath {
1748 worktree_id: file.worktree_id(cx),
1749 path: file.path.clone(),
1750 };
1751 let jump_anchor = range
1752 .primary
1753 .as_ref()
1754 .map_or(range.context.start, |primary| primary.start);
1755 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1756
1757 enum JumpIcon {}
1758 MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
1759 let style = style.jump_icon.style_for(state);
1760 Svg::new("icons/arrow_up_right_8.svg")
1761 .with_color(style.color)
1762 .constrained()
1763 .with_width(style.icon_width)
1764 .aligned()
1765 .contained()
1766 .with_style(style.container)
1767 .constrained()
1768 .with_width(style.button_width)
1769 .with_height(style.button_width)
1770 })
1771 .with_cursor_style(CursorStyle::PointingHand)
1772 .on_click(MouseButton::Left, move |_, editor, cx| {
1773 if let Some(workspace) = editor
1774 .workspace
1775 .as_ref()
1776 .and_then(|(workspace, _)| workspace.upgrade(cx))
1777 {
1778 workspace.update(cx, |workspace, cx| {
1779 Editor::jump(
1780 workspace,
1781 jump_path.clone(),
1782 jump_position,
1783 jump_anchor,
1784 cx,
1785 );
1786 });
1787 }
1788 })
1789 .with_tooltip::<JumpIcon>(
1790 (*id).into(),
1791 "Jump to Buffer".to_string(),
1792 Some(Box::new(crate::OpenExcerpts)),
1793 tooltip_style.clone(),
1794 cx,
1795 )
1796 .aligned()
1797 .flex_float()
1798 });
1799
1800 if *starts_new_buffer {
1801 let editor_font_size = style.text.font_size;
1802 let style = &style.diagnostic_path_header;
1803 let font_size = (style.text_scale_factor * editor_font_size).round();
1804
1805 let path = buffer.resolve_file_path(cx, include_root);
1806 let mut filename = None;
1807 let mut parent_path = None;
1808 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1809 if let Some(path) = path {
1810 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1811 parent_path =
1812 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1813 }
1814
1815 Flex::row()
1816 .with_child(
1817 Label::new(
1818 filename.unwrap_or_else(|| "untitled".to_string()),
1819 style.filename.text.clone().with_font_size(font_size),
1820 )
1821 .contained()
1822 .with_style(style.filename.container)
1823 .aligned(),
1824 )
1825 .with_children(parent_path.map(|path| {
1826 Label::new(path, style.path.text.clone().with_font_size(font_size))
1827 .contained()
1828 .with_style(style.path.container)
1829 .aligned()
1830 }))
1831 .with_children(jump_icon)
1832 .contained()
1833 .with_style(style.container)
1834 .with_padding_left(gutter_padding)
1835 .with_padding_right(gutter_padding)
1836 .expanded()
1837 .into_any_named("path header block")
1838 } else {
1839 let text_style = style.text.clone();
1840 Flex::row()
1841 .with_child(Label::new("⋯", text_style))
1842 .with_children(jump_icon)
1843 .contained()
1844 .with_padding_left(gutter_padding)
1845 .with_padding_right(gutter_padding)
1846 .expanded()
1847 .into_any_named("collapsed context")
1848 }
1849 }
1850 };
1851
1852 element.layout(
1853 SizeConstraint {
1854 min: Vector2F::zero(),
1855 max: vec2f(width, block.height() as f32 * line_height),
1856 },
1857 editor,
1858 cx,
1859 );
1860 element
1861 };
1862
1863 let mut fixed_block_max_width = 0f32;
1864 let mut blocks = Vec::new();
1865 for (row, block) in fixed_blocks {
1866 let element = render_block(block, f32::INFINITY, block_id);
1867 block_id += 1;
1868 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1869 blocks.push(BlockLayout {
1870 row,
1871 element,
1872 style: BlockStyle::Fixed,
1873 });
1874 }
1875 for (row, block) in non_fixed_blocks {
1876 let style = match block {
1877 TransformBlock::Custom(block) => block.style(),
1878 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1879 };
1880 let width = match style {
1881 BlockStyle::Sticky => editor_width,
1882 BlockStyle::Flex => editor_width
1883 .max(fixed_block_max_width)
1884 .max(gutter_width + scroll_width),
1885 BlockStyle::Fixed => unreachable!(),
1886 };
1887 let element = render_block(block, width, block_id);
1888 block_id += 1;
1889 blocks.push(BlockLayout {
1890 row,
1891 element,
1892 style,
1893 });
1894 }
1895 (
1896 scroll_width.max(fixed_block_max_width - gutter_width),
1897 blocks,
1898 )
1899 }
1900}
1901
1902struct HighlightedChunk<'a> {
1903 chunk: &'a str,
1904 style: Option<HighlightStyle>,
1905 is_tab: bool,
1906}
1907
1908#[derive(Debug)]
1909pub struct LineWithInvisibles {
1910 pub line: Line,
1911 invisibles: Vec<Invisible>,
1912}
1913
1914impl LineWithInvisibles {
1915 fn from_chunks<'a>(
1916 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1917 text_style: &TextStyle,
1918 text_layout_cache: &TextLayoutCache,
1919 font_cache: &Arc<FontCache>,
1920 max_line_len: usize,
1921 max_line_count: usize,
1922 line_number_layouts: &[Option<Line>],
1923 editor_mode: EditorMode,
1924 ) -> Vec<Self> {
1925 let mut layouts = Vec::with_capacity(max_line_count);
1926 let mut line = String::new();
1927 let mut invisibles = Vec::new();
1928 let mut styles = Vec::new();
1929 let mut non_whitespace_added = false;
1930 let mut row = 0;
1931 let mut line_exceeded_max_len = false;
1932 for highlighted_chunk in chunks.chain([HighlightedChunk {
1933 chunk: "\n",
1934 style: None,
1935 is_tab: false,
1936 }]) {
1937 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1938 if ix > 0 {
1939 layouts.push(Self {
1940 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1941 invisibles: invisibles.drain(..).collect(),
1942 });
1943
1944 line.clear();
1945 styles.clear();
1946 row += 1;
1947 line_exceeded_max_len = false;
1948 non_whitespace_added = false;
1949 if row == max_line_count {
1950 return layouts;
1951 }
1952 }
1953
1954 if !line_chunk.is_empty() && !line_exceeded_max_len {
1955 let text_style = if let Some(style) = highlighted_chunk.style {
1956 text_style
1957 .clone()
1958 .highlight(style, font_cache)
1959 .map(Cow::Owned)
1960 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1961 } else {
1962 Cow::Borrowed(text_style)
1963 };
1964
1965 if line.len() + line_chunk.len() > max_line_len {
1966 let mut chunk_len = max_line_len - line.len();
1967 while !line_chunk.is_char_boundary(chunk_len) {
1968 chunk_len -= 1;
1969 }
1970 line_chunk = &line_chunk[..chunk_len];
1971 line_exceeded_max_len = true;
1972 }
1973
1974 styles.push((
1975 line_chunk.len(),
1976 RunStyle {
1977 font_id: text_style.font_id,
1978 color: text_style.color,
1979 underline: text_style.underline,
1980 },
1981 ));
1982
1983 if editor_mode == EditorMode::Full {
1984 // Line wrap pads its contents with fake whitespaces,
1985 // avoid printing them
1986 let inside_wrapped_string = line_number_layouts
1987 .get(row)
1988 .and_then(|layout| layout.as_ref())
1989 .is_none();
1990 if highlighted_chunk.is_tab {
1991 if non_whitespace_added || !inside_wrapped_string {
1992 invisibles.push(Invisible::Tab {
1993 line_start_offset: line.len(),
1994 });
1995 }
1996 } else {
1997 invisibles.extend(
1998 line_chunk
1999 .chars()
2000 .enumerate()
2001 .filter(|(_, line_char)| {
2002 let is_whitespace = line_char.is_whitespace();
2003 non_whitespace_added |= !is_whitespace;
2004 is_whitespace
2005 && (non_whitespace_added || !inside_wrapped_string)
2006 })
2007 .map(|(whitespace_index, _)| Invisible::Whitespace {
2008 line_offset: line.len() + whitespace_index,
2009 }),
2010 )
2011 }
2012 }
2013
2014 line.push_str(line_chunk);
2015 }
2016 }
2017 }
2018
2019 layouts
2020 }
2021
2022 fn draw(
2023 &self,
2024 layout: &LayoutState,
2025 row: u32,
2026 scroll_top: f32,
2027 scene: &mut SceneBuilder,
2028 content_origin: Vector2F,
2029 scroll_left: f32,
2030 visible_text_bounds: RectF,
2031 whitespace_setting: ShowWhitespaceSetting,
2032 selection_ranges: &[Range<DisplayPoint>],
2033 visible_bounds: RectF,
2034 cx: &mut ViewContext<Editor>,
2035 ) {
2036 let line_height = layout.position_map.line_height;
2037 let line_y = row as f32 * line_height - scroll_top;
2038
2039 self.line.paint(
2040 scene,
2041 content_origin + vec2f(-scroll_left, line_y),
2042 visible_text_bounds,
2043 line_height,
2044 cx,
2045 );
2046
2047 self.draw_invisibles(
2048 &selection_ranges,
2049 layout,
2050 content_origin,
2051 scroll_left,
2052 line_y,
2053 row,
2054 scene,
2055 visible_bounds,
2056 line_height,
2057 whitespace_setting,
2058 cx,
2059 );
2060 }
2061
2062 fn draw_invisibles(
2063 &self,
2064 selection_ranges: &[Range<DisplayPoint>],
2065 layout: &LayoutState,
2066 content_origin: Vector2F,
2067 scroll_left: f32,
2068 line_y: f32,
2069 row: u32,
2070 scene: &mut SceneBuilder,
2071 visible_bounds: RectF,
2072 line_height: f32,
2073 whitespace_setting: ShowWhitespaceSetting,
2074 cx: &mut ViewContext<Editor>,
2075 ) {
2076 let allowed_invisibles_regions = match whitespace_setting {
2077 ShowWhitespaceSetting::None => return,
2078 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2079 ShowWhitespaceSetting::All => None,
2080 };
2081
2082 for invisible in &self.invisibles {
2083 let (&token_offset, invisible_symbol) = match invisible {
2084 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2085 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2086 };
2087
2088 let x_offset = self.line.x_for_index(token_offset);
2089 let invisible_offset =
2090 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2091 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2092
2093 if let Some(allowed_regions) = allowed_invisibles_regions {
2094 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2095 if !allowed_regions
2096 .iter()
2097 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2098 {
2099 continue;
2100 }
2101 }
2102 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2103 }
2104 }
2105}
2106
2107#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2108enum Invisible {
2109 Tab { line_start_offset: usize },
2110 Whitespace { line_offset: usize },
2111}
2112
2113impl Element<Editor> for EditorElement {
2114 type LayoutState = LayoutState;
2115 type PaintState = ();
2116
2117 fn layout(
2118 &mut self,
2119 constraint: SizeConstraint,
2120 editor: &mut Editor,
2121 cx: &mut LayoutContext<Editor>,
2122 ) -> (Vector2F, Self::LayoutState) {
2123 let mut size = constraint.max;
2124 if size.x().is_infinite() {
2125 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2126 }
2127
2128 let snapshot = editor.snapshot(cx);
2129 let style = self.style.clone();
2130
2131 let line_height = (style.text.font_size * style.line_height_scalar).round();
2132
2133 let gutter_padding;
2134 let gutter_width;
2135 let gutter_margin;
2136 if snapshot.show_gutter {
2137 let em_width = style.text.em_width(cx.font_cache());
2138 gutter_padding = (em_width * style.gutter_padding_factor).round();
2139 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2140 gutter_margin = -style.text.descent(cx.font_cache());
2141 } else {
2142 gutter_padding = 0.0;
2143 gutter_width = 0.0;
2144 gutter_margin = 0.0;
2145 };
2146
2147 let text_width = size.x() - gutter_width;
2148 let em_width = style.text.em_width(cx.font_cache());
2149 let em_advance = style.text.em_advance(cx.font_cache());
2150 let overscroll = vec2f(em_width, 0.);
2151 let snapshot = {
2152 editor.set_visible_line_count(size.y() / line_height, cx);
2153
2154 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2155 let wrap_width = match editor.soft_wrap_mode(cx) {
2156 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2157 SoftWrap::EditorWidth => editor_width,
2158 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2159 };
2160
2161 if editor.set_wrap_width(Some(wrap_width), cx) {
2162 editor.snapshot(cx)
2163 } else {
2164 snapshot
2165 }
2166 };
2167
2168 let wrap_guides = editor
2169 .wrap_guides(cx)
2170 .iter()
2171 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2172 .collect();
2173
2174 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2175 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2176 size.set_y(
2177 scroll_height
2178 .min(constraint.max_along(Axis::Vertical))
2179 .max(constraint.min_along(Axis::Vertical))
2180 .min(line_height * max_lines as f32),
2181 )
2182 } else if let EditorMode::SingleLine = snapshot.mode {
2183 size.set_y(
2184 line_height
2185 .min(constraint.max_along(Axis::Vertical))
2186 .max(constraint.min_along(Axis::Vertical)),
2187 )
2188 } else if size.y().is_infinite() {
2189 size.set_y(scroll_height);
2190 }
2191 let gutter_size = vec2f(gutter_width, size.y());
2192 let text_size = vec2f(text_width, size.y());
2193
2194 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2195 let mut snapshot = editor.snapshot(cx);
2196
2197 let scroll_position = snapshot.scroll_position();
2198 // The scroll position is a fractional point, the whole number of which represents
2199 // the top of the window in terms of display rows.
2200 let start_row = scroll_position.y() as u32;
2201 let height_in_lines = size.y() / line_height;
2202 let max_row = snapshot.max_point().row();
2203
2204 // Add 1 to ensure selections bleed off screen
2205 let end_row = 1 + cmp::min(
2206 (scroll_position.y() + height_in_lines).ceil() as u32,
2207 max_row,
2208 );
2209
2210 let start_anchor = if start_row == 0 {
2211 Anchor::min()
2212 } else {
2213 snapshot
2214 .buffer_snapshot
2215 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2216 };
2217 let end_anchor = if end_row > max_row {
2218 Anchor::max()
2219 } else {
2220 snapshot
2221 .buffer_snapshot
2222 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2223 };
2224
2225 let mut selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)> = Vec::new();
2226 let mut active_rows = BTreeMap::new();
2227 let mut fold_ranges = Vec::new();
2228 let is_singleton = editor.is_singleton(cx);
2229
2230 let highlighted_rows = editor.highlighted_rows();
2231 let theme = theme::current(cx);
2232 let highlighted_ranges = editor.background_highlights_in_range(
2233 start_anchor..end_anchor,
2234 &snapshot.display_snapshot,
2235 theme.as_ref(),
2236 );
2237
2238 fold_ranges.extend(
2239 snapshot
2240 .folds_in_range(start_anchor..end_anchor)
2241 .map(|anchor| {
2242 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2243 (
2244 start.row,
2245 start.to_display_point(&snapshot.display_snapshot)
2246 ..anchor.end.to_display_point(&snapshot),
2247 )
2248 }),
2249 );
2250
2251 let mut remote_selections = HashMap::default();
2252 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2253 .buffer_snapshot
2254 .remote_selections_in_range(&(start_anchor..end_anchor))
2255 {
2256 let replica_id = if let Some(mapping) = &editor.replica_id_mapping {
2257 mapping.get(&replica_id).copied()
2258 } else {
2259 None
2260 };
2261
2262 // The local selections match the leader's selections.
2263 if replica_id.is_some() && replica_id == editor.leader_replica_id {
2264 continue;
2265 }
2266 remote_selections
2267 .entry(replica_id)
2268 .or_insert(Vec::new())
2269 .push(SelectionLayout::new(
2270 selection,
2271 line_mode,
2272 cursor_shape,
2273 &snapshot.display_snapshot,
2274 false,
2275 false,
2276 ));
2277 }
2278 selections.extend(remote_selections);
2279
2280 let mut newest_selection_head = None;
2281
2282 if editor.show_local_selections {
2283 let mut local_selections: Vec<Selection<Point>> = editor
2284 .selections
2285 .disjoint_in_range(start_anchor..end_anchor, cx);
2286 local_selections.extend(editor.selections.pending(cx));
2287 let mut layouts = Vec::new();
2288 let newest = editor.selections.newest(cx);
2289 for selection in local_selections.drain(..) {
2290 let is_empty = selection.start == selection.end;
2291 let is_newest = selection == newest;
2292
2293 let layout = SelectionLayout::new(
2294 selection,
2295 editor.selections.line_mode,
2296 editor.cursor_shape,
2297 &snapshot.display_snapshot,
2298 is_newest,
2299 true,
2300 );
2301 if is_newest {
2302 newest_selection_head = Some(layout.head);
2303 }
2304
2305 for row in cmp::max(layout.active_rows.start, start_row)
2306 ..=cmp::min(layout.active_rows.end, end_row)
2307 {
2308 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2309 *contains_non_empty_selection |= !is_empty;
2310 }
2311 layouts.push(layout);
2312 }
2313
2314 // Render the local selections in the leader's color when following.
2315 let local_replica_id = if let Some(leader_replica_id) = editor.leader_replica_id {
2316 leader_replica_id
2317 } else {
2318 let replica_id = editor.replica_id(cx);
2319 if let Some(mapping) = &editor.replica_id_mapping {
2320 mapping.get(&replica_id).copied().unwrap_or(replica_id)
2321 } else {
2322 replica_id
2323 }
2324 };
2325
2326 selections.push((Some(local_replica_id), layouts));
2327 }
2328
2329 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2330 let show_scrollbars = match scrollbar_settings.show {
2331 ShowScrollbar::Auto => {
2332 // Git
2333 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2334 ||
2335 // Selections
2336 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2337 // Scrollmanager
2338 || editor.scroll_manager.scrollbars_visible()
2339 }
2340 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2341 ShowScrollbar::Always => true,
2342 ShowScrollbar::Never => false,
2343 };
2344
2345 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2346 .into_iter()
2347 .map(|(id, fold)| {
2348 let color = self
2349 .style
2350 .folds
2351 .ellipses
2352 .background
2353 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2354 .color;
2355
2356 (id, fold, color)
2357 })
2358 .collect();
2359
2360 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2361 start_row..end_row,
2362 &active_rows,
2363 newest_selection_head.or_else(|| Some(editor.selections.newest_display(cx).head())),
2364 is_singleton,
2365 &snapshot,
2366 cx,
2367 );
2368
2369 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2370
2371 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2372
2373 let mut max_visible_line_width = 0.0;
2374 let line_layouts =
2375 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2376 for line_with_invisibles in &line_layouts {
2377 if line_with_invisibles.line.width() > max_visible_line_width {
2378 max_visible_line_width = line_with_invisibles.line.width();
2379 }
2380 }
2381
2382 let style = self.style.clone();
2383 let longest_line_width = layout_line(
2384 snapshot.longest_row(),
2385 &snapshot,
2386 &style,
2387 cx.text_layout_cache(),
2388 )
2389 .width();
2390 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2391 let em_width = style.text.em_width(cx.font_cache());
2392 let (scroll_width, blocks) = self.layout_blocks(
2393 start_row..end_row,
2394 &snapshot,
2395 size.x(),
2396 scroll_width,
2397 gutter_padding,
2398 gutter_width,
2399 em_width,
2400 gutter_width + gutter_margin,
2401 line_height,
2402 &style,
2403 &line_layouts,
2404 editor,
2405 cx,
2406 );
2407
2408 let scroll_max = vec2f(
2409 ((scroll_width - text_size.x()) / em_width).max(0.0),
2410 max_row as f32,
2411 );
2412
2413 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2414
2415 let autoscrolled = if autoscroll_horizontally {
2416 editor.autoscroll_horizontally(
2417 start_row,
2418 text_size.x(),
2419 scroll_width,
2420 em_width,
2421 &line_layouts,
2422 cx,
2423 )
2424 } else {
2425 false
2426 };
2427
2428 if clamped || autoscrolled {
2429 snapshot = editor.snapshot(cx);
2430 }
2431
2432 let style = editor.style(cx);
2433
2434 let mut context_menu = None;
2435 let mut code_actions_indicator = None;
2436 if let Some(newest_selection_head) = newest_selection_head {
2437 if (start_row..end_row).contains(&newest_selection_head.row()) {
2438 if editor.context_menu_visible() {
2439 context_menu =
2440 editor.render_context_menu(newest_selection_head, style.clone(), cx);
2441 }
2442
2443 let active = matches!(
2444 editor.context_menu,
2445 Some(crate::ContextMenu::CodeActions(_))
2446 );
2447
2448 code_actions_indicator = editor
2449 .render_code_actions_indicator(&style, active, cx)
2450 .map(|indicator| (newest_selection_head.row(), indicator));
2451 }
2452 }
2453
2454 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2455 let mut hover = editor
2456 .hover_state
2457 .render(&snapshot, &style, visible_rows, cx);
2458 let mode = editor.mode;
2459
2460 let mut fold_indicators = editor.render_fold_indicators(
2461 fold_statuses,
2462 &style,
2463 editor.gutter_hovered,
2464 line_height,
2465 gutter_margin,
2466 cx,
2467 );
2468
2469 if let Some((_, context_menu)) = context_menu.as_mut() {
2470 context_menu.layout(
2471 SizeConstraint {
2472 min: Vector2F::zero(),
2473 max: vec2f(
2474 cx.window_size().x() * 0.7,
2475 (12. * line_height).min((size.y() - line_height) / 2.),
2476 ),
2477 },
2478 editor,
2479 cx,
2480 );
2481 }
2482
2483 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2484 indicator.layout(
2485 SizeConstraint::strict_along(
2486 Axis::Vertical,
2487 line_height * style.code_actions.vertical_scale,
2488 ),
2489 editor,
2490 cx,
2491 );
2492 }
2493
2494 for fold_indicator in fold_indicators.iter_mut() {
2495 if let Some(indicator) = fold_indicator.as_mut() {
2496 indicator.layout(
2497 SizeConstraint::strict_along(
2498 Axis::Vertical,
2499 line_height * style.code_actions.vertical_scale,
2500 ),
2501 editor,
2502 cx,
2503 );
2504 }
2505 }
2506
2507 if let Some((_, hover_popovers)) = hover.as_mut() {
2508 for hover_popover in hover_popovers.iter_mut() {
2509 hover_popover.layout(
2510 SizeConstraint {
2511 min: Vector2F::zero(),
2512 max: vec2f(
2513 (120. * em_width) // Default size
2514 .min(size.x() / 2.) // Shrink to half of the editor width
2515 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2516 (16. * line_height) // Default size
2517 .min(size.y() / 2.) // Shrink to half of the editor height
2518 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2519 ),
2520 },
2521 editor,
2522 cx,
2523 );
2524 }
2525 }
2526
2527 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2528 let invisible_symbol_style = RunStyle {
2529 color: self.style.whitespace,
2530 font_id: self.style.text.font_id,
2531 underline: Default::default(),
2532 };
2533
2534 (
2535 size,
2536 LayoutState {
2537 mode,
2538 position_map: Arc::new(PositionMap {
2539 size,
2540 scroll_max,
2541 line_layouts,
2542 line_height,
2543 em_width,
2544 em_advance,
2545 snapshot,
2546 }),
2547 visible_display_row_range: start_row..end_row,
2548 wrap_guides,
2549 gutter_size,
2550 gutter_padding,
2551 text_size,
2552 scrollbar_row_range,
2553 show_scrollbars,
2554 is_singleton,
2555 max_row,
2556 gutter_margin,
2557 active_rows,
2558 highlighted_rows,
2559 highlighted_ranges,
2560 fold_ranges,
2561 line_number_layouts,
2562 display_hunks,
2563 blocks,
2564 selections,
2565 context_menu,
2566 code_actions_indicator,
2567 fold_indicators,
2568 tab_invisible: cx.text_layout_cache().layout_str(
2569 "→",
2570 invisible_symbol_font_size,
2571 &[("→".len(), invisible_symbol_style)],
2572 ),
2573 space_invisible: cx.text_layout_cache().layout_str(
2574 "•",
2575 invisible_symbol_font_size,
2576 &[("•".len(), invisible_symbol_style)],
2577 ),
2578 hover_popovers: hover,
2579 },
2580 )
2581 }
2582
2583 fn paint(
2584 &mut self,
2585 scene: &mut SceneBuilder,
2586 bounds: RectF,
2587 visible_bounds: RectF,
2588 layout: &mut Self::LayoutState,
2589 editor: &mut Editor,
2590 cx: &mut PaintContext<Editor>,
2591 ) -> Self::PaintState {
2592 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2593 scene.push_layer(Some(visible_bounds));
2594
2595 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2596 let text_bounds = RectF::new(
2597 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2598 layout.text_size,
2599 );
2600
2601 Self::attach_mouse_handlers(
2602 scene,
2603 &layout.position_map,
2604 layout.hover_popovers.is_some(),
2605 visible_bounds,
2606 text_bounds,
2607 gutter_bounds,
2608 bounds,
2609 cx,
2610 );
2611
2612 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2613 if layout.gutter_size.x() > 0. {
2614 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2615 }
2616 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2617
2618 scene.push_layer(Some(bounds));
2619 if !layout.blocks.is_empty() {
2620 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2621 }
2622 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2623 scene.pop_layer();
2624
2625 scene.pop_layer();
2626 }
2627
2628 fn rect_for_text_range(
2629 &self,
2630 range_utf16: Range<usize>,
2631 bounds: RectF,
2632 _: RectF,
2633 layout: &Self::LayoutState,
2634 _: &Self::PaintState,
2635 _: &Editor,
2636 _: &ViewContext<Editor>,
2637 ) -> Option<RectF> {
2638 let text_bounds = RectF::new(
2639 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2640 layout.text_size,
2641 );
2642 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2643 let scroll_position = layout.position_map.snapshot.scroll_position();
2644 let start_row = scroll_position.y() as u32;
2645 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2646 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2647
2648 let range_start = OffsetUtf16(range_utf16.start)
2649 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2650 if range_start.row() < start_row {
2651 return None;
2652 }
2653
2654 let line = &layout
2655 .position_map
2656 .line_layouts
2657 .get((range_start.row() - start_row) as usize)?
2658 .line;
2659 let range_start_x = line.x_for_index(range_start.column() as usize);
2660 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2661 Some(RectF::new(
2662 content_origin
2663 + vec2f(
2664 range_start_x,
2665 range_start_y + layout.position_map.line_height,
2666 )
2667 - vec2f(scroll_left, scroll_top),
2668 vec2f(
2669 layout.position_map.em_width,
2670 layout.position_map.line_height,
2671 ),
2672 ))
2673 }
2674
2675 fn debug(
2676 &self,
2677 bounds: RectF,
2678 _: &Self::LayoutState,
2679 _: &Self::PaintState,
2680 _: &Editor,
2681 _: &ViewContext<Editor>,
2682 ) -> json::Value {
2683 json!({
2684 "type": "BufferElement",
2685 "bounds": bounds.to_json()
2686 })
2687 }
2688}
2689
2690type BufferRow = u32;
2691
2692pub struct LayoutState {
2693 position_map: Arc<PositionMap>,
2694 gutter_size: Vector2F,
2695 gutter_padding: f32,
2696 gutter_margin: f32,
2697 text_size: Vector2F,
2698 mode: EditorMode,
2699 wrap_guides: SmallVec<[(f32, bool); 2]>,
2700 visible_display_row_range: Range<u32>,
2701 active_rows: BTreeMap<u32, bool>,
2702 highlighted_rows: Option<Range<u32>>,
2703 line_number_layouts: Vec<Option<text_layout::Line>>,
2704 display_hunks: Vec<DisplayDiffHunk>,
2705 blocks: Vec<BlockLayout>,
2706 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2707 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2708 selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)>,
2709 scrollbar_row_range: Range<f32>,
2710 show_scrollbars: bool,
2711 is_singleton: bool,
2712 max_row: u32,
2713 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2714 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2715 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2716 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2717 tab_invisible: Line,
2718 space_invisible: Line,
2719}
2720
2721struct PositionMap {
2722 size: Vector2F,
2723 line_height: f32,
2724 scroll_max: Vector2F,
2725 em_width: f32,
2726 em_advance: f32,
2727 line_layouts: Vec<LineWithInvisibles>,
2728 snapshot: EditorSnapshot,
2729}
2730
2731#[derive(Debug, Copy, Clone)]
2732pub struct PointForPosition {
2733 pub previous_valid: DisplayPoint,
2734 pub next_valid: DisplayPoint,
2735 pub exact_unclipped: DisplayPoint,
2736 pub column_overshoot_after_line_end: u32,
2737}
2738
2739impl PointForPosition {
2740 #[cfg(test)]
2741 pub fn valid(valid: DisplayPoint) -> Self {
2742 Self {
2743 previous_valid: valid,
2744 next_valid: valid,
2745 exact_unclipped: valid,
2746 column_overshoot_after_line_end: 0,
2747 }
2748 }
2749
2750 fn as_valid(&self) -> Option<DisplayPoint> {
2751 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2752 Some(self.previous_valid)
2753 } else {
2754 None
2755 }
2756 }
2757}
2758
2759impl PositionMap {
2760 fn point_for_position(&self, text_bounds: RectF, position: Vector2F) -> PointForPosition {
2761 let scroll_position = self.snapshot.scroll_position();
2762 let position = position - text_bounds.origin();
2763 let y = position.y().max(0.0).min(self.size.y());
2764 let x = position.x() + (scroll_position.x() * self.em_width);
2765 let row = (y / self.line_height + scroll_position.y()) as u32;
2766 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2767 .line_layouts
2768 .get(row as usize - scroll_position.y() as usize)
2769 .map(|line_with_spaces| &line_with_spaces.line)
2770 {
2771 if let Some(ix) = line.index_for_x(x) {
2772 (ix as u32, 0.0)
2773 } else {
2774 (line.len() as u32, 0f32.max(x - line.width()))
2775 }
2776 } else {
2777 (0, x)
2778 };
2779
2780 let mut exact_unclipped = DisplayPoint::new(row, column);
2781 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2782 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2783
2784 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2785 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2786 PointForPosition {
2787 previous_valid,
2788 next_valid,
2789 exact_unclipped,
2790 column_overshoot_after_line_end,
2791 }
2792 }
2793}
2794
2795struct BlockLayout {
2796 row: u32,
2797 element: AnyElement<Editor>,
2798 style: BlockStyle,
2799}
2800
2801fn layout_line(
2802 row: u32,
2803 snapshot: &EditorSnapshot,
2804 style: &EditorStyle,
2805 layout_cache: &TextLayoutCache,
2806) -> text_layout::Line {
2807 let mut line = snapshot.line(row);
2808
2809 if line.len() > MAX_LINE_LEN {
2810 let mut len = MAX_LINE_LEN;
2811 while !line.is_char_boundary(len) {
2812 len -= 1;
2813 }
2814
2815 line.truncate(len);
2816 }
2817
2818 layout_cache.layout_str(
2819 &line,
2820 style.text.font_size,
2821 &[(
2822 snapshot.line_len(row) as usize,
2823 RunStyle {
2824 font_id: style.text.font_id,
2825 color: Color::black(),
2826 underline: Default::default(),
2827 },
2828 )],
2829 )
2830}
2831
2832#[derive(Debug)]
2833pub struct Cursor {
2834 origin: Vector2F,
2835 block_width: f32,
2836 line_height: f32,
2837 color: Color,
2838 shape: CursorShape,
2839 block_text: Option<Line>,
2840}
2841
2842impl Cursor {
2843 pub fn new(
2844 origin: Vector2F,
2845 block_width: f32,
2846 line_height: f32,
2847 color: Color,
2848 shape: CursorShape,
2849 block_text: Option<Line>,
2850 ) -> Cursor {
2851 Cursor {
2852 origin,
2853 block_width,
2854 line_height,
2855 color,
2856 shape,
2857 block_text,
2858 }
2859 }
2860
2861 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2862 RectF::new(
2863 self.origin + origin,
2864 vec2f(self.block_width, self.line_height),
2865 )
2866 }
2867
2868 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2869 let bounds = match self.shape {
2870 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2871 CursorShape::Block | CursorShape::Hollow => RectF::new(
2872 self.origin + origin,
2873 vec2f(self.block_width, self.line_height),
2874 ),
2875 CursorShape::Underscore => RectF::new(
2876 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2877 vec2f(self.block_width, 2.0),
2878 ),
2879 };
2880
2881 //Draw background or border quad
2882 if matches!(self.shape, CursorShape::Hollow) {
2883 scene.push_quad(Quad {
2884 bounds,
2885 background: None,
2886 border: Border::all(1., self.color),
2887 corner_radii: Default::default(),
2888 });
2889 } else {
2890 scene.push_quad(Quad {
2891 bounds,
2892 background: Some(self.color),
2893 border: Default::default(),
2894 corner_radii: Default::default(),
2895 });
2896 }
2897
2898 if let Some(block_text) = &self.block_text {
2899 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2900 }
2901 }
2902
2903 pub fn shape(&self) -> CursorShape {
2904 self.shape
2905 }
2906}
2907
2908#[derive(Debug)]
2909pub struct HighlightedRange {
2910 pub start_y: f32,
2911 pub line_height: f32,
2912 pub lines: Vec<HighlightedRangeLine>,
2913 pub color: Color,
2914 pub corner_radius: f32,
2915}
2916
2917#[derive(Debug)]
2918pub struct HighlightedRangeLine {
2919 pub start_x: f32,
2920 pub end_x: f32,
2921}
2922
2923impl HighlightedRange {
2924 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2925 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2926 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2927 self.paint_lines(
2928 self.start_y + self.line_height,
2929 &self.lines[1..],
2930 bounds,
2931 scene,
2932 );
2933 } else {
2934 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2935 }
2936 }
2937
2938 fn paint_lines(
2939 &self,
2940 start_y: f32,
2941 lines: &[HighlightedRangeLine],
2942 bounds: RectF,
2943 scene: &mut SceneBuilder,
2944 ) {
2945 if lines.is_empty() {
2946 return;
2947 }
2948
2949 let mut path = PathBuilder::new();
2950 let first_line = lines.first().unwrap();
2951 let last_line = lines.last().unwrap();
2952
2953 let first_top_left = vec2f(first_line.start_x, start_y);
2954 let first_top_right = vec2f(first_line.end_x, start_y);
2955
2956 let curve_height = vec2f(0., self.corner_radius);
2957 let curve_width = |start_x: f32, end_x: f32| {
2958 let max = (end_x - start_x) / 2.;
2959 let width = if max < self.corner_radius {
2960 max
2961 } else {
2962 self.corner_radius
2963 };
2964
2965 vec2f(width, 0.)
2966 };
2967
2968 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2969 path.reset(first_top_right - top_curve_width);
2970 path.curve_to(first_top_right + curve_height, first_top_right);
2971
2972 let mut iter = lines.iter().enumerate().peekable();
2973 while let Some((ix, line)) = iter.next() {
2974 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2975
2976 if let Some((_, next_line)) = iter.peek() {
2977 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2978
2979 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2980 Ordering::Equal => {
2981 path.line_to(bottom_right);
2982 }
2983 Ordering::Less => {
2984 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2985 path.line_to(bottom_right - curve_height);
2986 if self.corner_radius > 0. {
2987 path.curve_to(bottom_right - curve_width, bottom_right);
2988 }
2989 path.line_to(next_top_right + curve_width);
2990 if self.corner_radius > 0. {
2991 path.curve_to(next_top_right + curve_height, next_top_right);
2992 }
2993 }
2994 Ordering::Greater => {
2995 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2996 path.line_to(bottom_right - curve_height);
2997 if self.corner_radius > 0. {
2998 path.curve_to(bottom_right + curve_width, bottom_right);
2999 }
3000 path.line_to(next_top_right - curve_width);
3001 if self.corner_radius > 0. {
3002 path.curve_to(next_top_right + curve_height, next_top_right);
3003 }
3004 }
3005 }
3006 } else {
3007 let curve_width = curve_width(line.start_x, line.end_x);
3008 path.line_to(bottom_right - curve_height);
3009 if self.corner_radius > 0. {
3010 path.curve_to(bottom_right - curve_width, bottom_right);
3011 }
3012
3013 let bottom_left = vec2f(line.start_x, bottom_right.y());
3014 path.line_to(bottom_left + curve_width);
3015 if self.corner_radius > 0. {
3016 path.curve_to(bottom_left - curve_height, bottom_left);
3017 }
3018 }
3019 }
3020
3021 if first_line.start_x > last_line.start_x {
3022 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3023 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
3024 path.line_to(second_top_left + curve_height);
3025 if self.corner_radius > 0. {
3026 path.curve_to(second_top_left + curve_width, second_top_left);
3027 }
3028 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
3029 path.line_to(first_bottom_left - curve_width);
3030 if self.corner_radius > 0. {
3031 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3032 }
3033 }
3034
3035 path.line_to(first_top_left + curve_height);
3036 if self.corner_radius > 0. {
3037 path.curve_to(first_top_left + top_curve_width, first_top_left);
3038 }
3039 path.line_to(first_top_right - top_curve_width);
3040
3041 scene.push_path(path.build(self.color, Some(bounds)));
3042 }
3043}
3044
3045fn range_to_bounds(
3046 range: &Range<DisplayPoint>,
3047 content_origin: Vector2F,
3048 scroll_left: f32,
3049 scroll_top: f32,
3050 visible_row_range: &Range<u32>,
3051 line_end_overshoot: f32,
3052 position_map: &PositionMap,
3053) -> impl Iterator<Item = RectF> {
3054 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
3055
3056 if range.start == range.end {
3057 return bounds.into_iter();
3058 }
3059
3060 let start_row = visible_row_range.start;
3061 let end_row = visible_row_range.end;
3062
3063 let row_range = if range.end.column() == 0 {
3064 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
3065 } else {
3066 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
3067 };
3068
3069 let first_y =
3070 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
3071
3072 for (idx, row) in row_range.enumerate() {
3073 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
3074
3075 let start_x = if row == range.start.row() {
3076 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
3077 - scroll_left
3078 } else {
3079 content_origin.x() - scroll_left
3080 };
3081
3082 let end_x = if row == range.end.row() {
3083 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
3084 } else {
3085 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
3086 };
3087
3088 bounds.push(RectF::from_points(
3089 vec2f(start_x, first_y + position_map.line_height * idx as f32),
3090 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
3091 ))
3092 }
3093
3094 bounds.into_iter()
3095}
3096
3097pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
3098 delta.powf(1.5) / 100.0
3099}
3100
3101fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3102 delta.powf(1.2) / 300.0
3103}
3104
3105#[cfg(test)]
3106mod tests {
3107 use super::*;
3108 use crate::{
3109 display_map::{BlockDisposition, BlockProperties},
3110 editor_tests::{init_test, update_test_language_settings},
3111 Editor, MultiBuffer,
3112 };
3113 use gpui::TestAppContext;
3114 use language::language_settings;
3115 use log::info;
3116 use std::{num::NonZeroU32, sync::Arc};
3117 use util::test::sample_text;
3118
3119 #[gpui::test]
3120 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3121 init_test(cx, |_| {});
3122 let editor = cx
3123 .add_window(|cx| {
3124 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3125 Editor::new(EditorMode::Full, buffer, None, None, cx)
3126 })
3127 .root(cx);
3128 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3129
3130 let layouts = editor.update(cx, |editor, cx| {
3131 let snapshot = editor.snapshot(cx);
3132 element
3133 .layout_line_numbers(0..6, &Default::default(), None, false, &snapshot, cx)
3134 .0
3135 });
3136 assert_eq!(layouts.len(), 6);
3137
3138 let relative_rows = editor.update(cx, |editor, cx| {
3139 let snapshot = editor.snapshot(cx);
3140 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3141 });
3142 assert_eq!(relative_rows[&0], 3);
3143 assert_eq!(relative_rows[&1], 2);
3144 assert_eq!(relative_rows[&2], 1);
3145 // current line has no relative number
3146 assert_eq!(relative_rows[&4], 1);
3147 assert_eq!(relative_rows[&5], 2);
3148
3149 // works if cursor is before screen
3150 let relative_rows = editor.update(cx, |editor, cx| {
3151 let snapshot = editor.snapshot(cx);
3152
3153 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3154 });
3155 assert_eq!(relative_rows.len(), 3);
3156 assert_eq!(relative_rows[&3], 2);
3157 assert_eq!(relative_rows[&4], 3);
3158 assert_eq!(relative_rows[&5], 4);
3159
3160 // works if cursor is after screen
3161 let relative_rows = editor.update(cx, |editor, cx| {
3162 let snapshot = editor.snapshot(cx);
3163
3164 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3165 });
3166 assert_eq!(relative_rows.len(), 3);
3167 assert_eq!(relative_rows[&0], 5);
3168 assert_eq!(relative_rows[&1], 4);
3169 assert_eq!(relative_rows[&2], 3);
3170 }
3171
3172 #[gpui::test]
3173 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3174 init_test(cx, |_| {});
3175
3176 let editor = cx
3177 .add_window(|cx| {
3178 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3179 Editor::new(EditorMode::Full, buffer, None, None, cx)
3180 })
3181 .root(cx);
3182 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3183 let (_, state) = editor.update(cx, |editor, cx| {
3184 editor.cursor_shape = CursorShape::Block;
3185 editor.change_selections(None, cx, |s| {
3186 s.select_ranges([
3187 Point::new(0, 0)..Point::new(1, 0),
3188 Point::new(3, 2)..Point::new(3, 3),
3189 Point::new(5, 6)..Point::new(6, 0),
3190 ]);
3191 });
3192 let mut new_parents = Default::default();
3193 let mut notify_views_if_parents_change = Default::default();
3194 let mut layout_cx = LayoutContext::new(
3195 cx,
3196 &mut new_parents,
3197 &mut notify_views_if_parents_change,
3198 false,
3199 );
3200 element.layout(
3201 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3202 editor,
3203 &mut layout_cx,
3204 )
3205 });
3206 assert_eq!(state.selections.len(), 1);
3207 let local_selections = &state.selections[0].1;
3208 assert_eq!(local_selections.len(), 3);
3209 // moves cursor back one line
3210 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3211 assert_eq!(
3212 local_selections[0].range,
3213 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3214 );
3215
3216 // moves cursor back one column
3217 assert_eq!(
3218 local_selections[1].range,
3219 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3220 );
3221 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3222
3223 // leaves cursor on the max point
3224 assert_eq!(
3225 local_selections[2].range,
3226 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3227 );
3228 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3229
3230 // active lines does not include 1 (even though the range of the selection does)
3231 assert_eq!(
3232 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3233 vec![0, 3, 5, 6]
3234 );
3235
3236 // multi-buffer support
3237 // in DisplayPoint co-ordinates, this is what we're dealing with:
3238 // 0: [[file
3239 // 1: header]]
3240 // 2: aaaaaa
3241 // 3: bbbbbb
3242 // 4: cccccc
3243 // 5:
3244 // 6: ...
3245 // 7: ffffff
3246 // 8: gggggg
3247 // 9: hhhhhh
3248 // 10:
3249 // 11: [[file
3250 // 12: header]]
3251 // 13: bbbbbb
3252 // 14: cccccc
3253 // 15: dddddd
3254 let editor = cx
3255 .add_window(|cx| {
3256 let buffer = MultiBuffer::build_multi(
3257 [
3258 (
3259 &(sample_text(8, 6, 'a') + "\n"),
3260 vec![
3261 Point::new(0, 0)..Point::new(3, 0),
3262 Point::new(4, 0)..Point::new(7, 0),
3263 ],
3264 ),
3265 (
3266 &(sample_text(8, 6, 'a') + "\n"),
3267 vec![Point::new(1, 0)..Point::new(3, 0)],
3268 ),
3269 ],
3270 cx,
3271 );
3272 Editor::new(EditorMode::Full, buffer, None, None, cx)
3273 })
3274 .root(cx);
3275 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3276 let (_, state) = editor.update(cx, |editor, cx| {
3277 editor.cursor_shape = CursorShape::Block;
3278 editor.change_selections(None, cx, |s| {
3279 s.select_display_ranges([
3280 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3281 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3282 ]);
3283 });
3284 let mut new_parents = Default::default();
3285 let mut notify_views_if_parents_change = Default::default();
3286 let mut layout_cx = LayoutContext::new(
3287 cx,
3288 &mut new_parents,
3289 &mut notify_views_if_parents_change,
3290 false,
3291 );
3292 element.layout(
3293 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3294 editor,
3295 &mut layout_cx,
3296 )
3297 });
3298
3299 assert_eq!(state.selections.len(), 1);
3300 let local_selections = &state.selections[0].1;
3301 assert_eq!(local_selections.len(), 2);
3302
3303 // moves cursor on excerpt boundary back a line
3304 // and doesn't allow selection to bleed through
3305 assert_eq!(
3306 local_selections[0].range,
3307 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3308 );
3309 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3310
3311 // moves cursor on buffer boundary back two lines
3312 // and doesn't allow selection to bleed through
3313 assert_eq!(
3314 local_selections[1].range,
3315 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3316 );
3317 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3318 }
3319
3320 #[gpui::test]
3321 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3322 init_test(cx, |_| {});
3323
3324 let editor = cx
3325 .add_window(|cx| {
3326 let buffer = MultiBuffer::build_simple("", cx);
3327 Editor::new(EditorMode::Full, buffer, None, None, cx)
3328 })
3329 .root(cx);
3330
3331 editor.update(cx, |editor, cx| {
3332 editor.set_placeholder_text("hello", cx);
3333 editor.insert_blocks(
3334 [BlockProperties {
3335 style: BlockStyle::Fixed,
3336 disposition: BlockDisposition::Above,
3337 height: 3,
3338 position: Anchor::min(),
3339 render: Arc::new(|_| Empty::new().into_any()),
3340 }],
3341 None,
3342 cx,
3343 );
3344
3345 // Blur the editor so that it displays placeholder text.
3346 cx.blur();
3347 });
3348
3349 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3350 let (size, mut state) = editor.update(cx, |editor, cx| {
3351 let mut new_parents = Default::default();
3352 let mut notify_views_if_parents_change = Default::default();
3353 let mut layout_cx = LayoutContext::new(
3354 cx,
3355 &mut new_parents,
3356 &mut notify_views_if_parents_change,
3357 false,
3358 );
3359 element.layout(
3360 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3361 editor,
3362 &mut layout_cx,
3363 )
3364 });
3365
3366 assert_eq!(state.position_map.line_layouts.len(), 4);
3367 assert_eq!(
3368 state
3369 .line_number_layouts
3370 .iter()
3371 .map(Option::is_some)
3372 .collect::<Vec<_>>(),
3373 &[false, false, false, true]
3374 );
3375
3376 // Don't panic.
3377 let mut scene = SceneBuilder::new(1.0);
3378 let bounds = RectF::new(Default::default(), size);
3379 editor.update(cx, |editor, cx| {
3380 element.paint(
3381 &mut scene,
3382 bounds,
3383 bounds,
3384 &mut state,
3385 editor,
3386 &mut PaintContext::new(cx),
3387 );
3388 });
3389 }
3390
3391 #[gpui::test]
3392 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3393 const TAB_SIZE: u32 = 4;
3394
3395 let input_text = "\t \t|\t| a b";
3396 let expected_invisibles = vec![
3397 Invisible::Tab {
3398 line_start_offset: 0,
3399 },
3400 Invisible::Whitespace {
3401 line_offset: TAB_SIZE as usize,
3402 },
3403 Invisible::Tab {
3404 line_start_offset: TAB_SIZE as usize + 1,
3405 },
3406 Invisible::Tab {
3407 line_start_offset: TAB_SIZE as usize * 2 + 1,
3408 },
3409 Invisible::Whitespace {
3410 line_offset: TAB_SIZE as usize * 3 + 1,
3411 },
3412 Invisible::Whitespace {
3413 line_offset: TAB_SIZE as usize * 3 + 3,
3414 },
3415 ];
3416 assert_eq!(
3417 expected_invisibles.len(),
3418 input_text
3419 .chars()
3420 .filter(|initial_char| initial_char.is_whitespace())
3421 .count(),
3422 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3423 );
3424
3425 init_test(cx, |s| {
3426 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3427 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3428 });
3429
3430 let actual_invisibles =
3431 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3432
3433 assert_eq!(expected_invisibles, actual_invisibles);
3434 }
3435
3436 #[gpui::test]
3437 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3438 init_test(cx, |s| {
3439 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3440 s.defaults.tab_size = NonZeroU32::new(4);
3441 });
3442
3443 for editor_mode_without_invisibles in [
3444 EditorMode::SingleLine,
3445 EditorMode::AutoHeight { max_lines: 100 },
3446 ] {
3447 let invisibles = collect_invisibles_from_new_editor(
3448 cx,
3449 editor_mode_without_invisibles,
3450 "\t\t\t| | a b",
3451 500.0,
3452 );
3453 assert!(invisibles.is_empty(),
3454 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3455 }
3456 }
3457
3458 #[gpui::test]
3459 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3460 let tab_size = 4;
3461 let input_text = "a\tbcd ".repeat(9);
3462 let repeated_invisibles = [
3463 Invisible::Tab {
3464 line_start_offset: 1,
3465 },
3466 Invisible::Whitespace {
3467 line_offset: tab_size as usize + 3,
3468 },
3469 Invisible::Whitespace {
3470 line_offset: tab_size as usize + 4,
3471 },
3472 Invisible::Whitespace {
3473 line_offset: tab_size as usize + 5,
3474 },
3475 ];
3476 let expected_invisibles = std::iter::once(repeated_invisibles)
3477 .cycle()
3478 .take(9)
3479 .flatten()
3480 .collect::<Vec<_>>();
3481 assert_eq!(
3482 expected_invisibles.len(),
3483 input_text
3484 .chars()
3485 .filter(|initial_char| initial_char.is_whitespace())
3486 .count(),
3487 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3488 );
3489 info!("Expected invisibles: {expected_invisibles:?}");
3490
3491 init_test(cx, |_| {});
3492
3493 // Put the same string with repeating whitespace pattern into editors of various size,
3494 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3495 let resize_step = 10.0;
3496 let mut editor_width = 200.0;
3497 while editor_width <= 1000.0 {
3498 update_test_language_settings(cx, |s| {
3499 s.defaults.tab_size = NonZeroU32::new(tab_size);
3500 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3501 s.defaults.preferred_line_length = Some(editor_width as u32);
3502 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3503 });
3504
3505 let actual_invisibles =
3506 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3507
3508 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3509 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3510 let mut i = 0;
3511 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3512 i = actual_index;
3513 match expected_invisibles.get(i) {
3514 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3515 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3516 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3517 _ => {
3518 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3519 }
3520 },
3521 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3522 }
3523 }
3524 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3525 assert!(
3526 missing_expected_invisibles.is_empty(),
3527 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3528 );
3529
3530 editor_width += resize_step;
3531 }
3532 }
3533
3534 fn collect_invisibles_from_new_editor(
3535 cx: &mut TestAppContext,
3536 editor_mode: EditorMode,
3537 input_text: &str,
3538 editor_width: f32,
3539 ) -> Vec<Invisible> {
3540 info!(
3541 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3542 );
3543 let editor = cx
3544 .add_window(|cx| {
3545 let buffer = MultiBuffer::build_simple(&input_text, cx);
3546 Editor::new(editor_mode, buffer, None, None, cx)
3547 })
3548 .root(cx);
3549
3550 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3551 let (_, layout_state) = editor.update(cx, |editor, cx| {
3552 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3553 editor.set_wrap_width(Some(editor_width), cx);
3554
3555 let mut new_parents = Default::default();
3556 let mut notify_views_if_parents_change = Default::default();
3557 let mut layout_cx = LayoutContext::new(
3558 cx,
3559 &mut new_parents,
3560 &mut notify_views_if_parents_change,
3561 false,
3562 );
3563 element.layout(
3564 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3565 editor,
3566 &mut layout_cx,
3567 )
3568 });
3569
3570 layout_state
3571 .position_map
3572 .line_layouts
3573 .iter()
3574 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3575 .flatten()
3576 .cloned()
3577 .collect()
3578 }
3579}