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.map(GoToDefinitionTrigger::Text),
399 cmd,
400 shift,
401 cx,
402 );
403
404 if editor.has_pending_selection() {
405 let mut scroll_delta = Vector2F::zero();
406
407 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
408 let top = text_bounds.origin_y() + vertical_margin;
409 let bottom = text_bounds.lower_left().y() - vertical_margin;
410 if position.y() < top {
411 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
412 }
413 if position.y() > bottom {
414 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
415 }
416
417 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
418 let left = text_bounds.origin_x() + horizontal_margin;
419 let right = text_bounds.upper_right().x() - horizontal_margin;
420 if position.x() < left {
421 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
422 left - position.x(),
423 ))
424 }
425 if position.x() > right {
426 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
427 position.x() - right,
428 ))
429 }
430
431 let point_for_position = position_map.point_for_position(text_bounds, position);
432
433 editor.select(
434 SelectPhase::Update {
435 position: point_for_position.previous_valid,
436 goal_column: point_for_position.exact_unclipped.column(),
437 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
438 .clamp(Vector2F::zero(), position_map.scroll_max),
439 },
440 cx,
441 );
442 hover_at(editor, point, cx);
443 true
444 } else {
445 hover_at(editor, point, cx);
446 false
447 }
448 }
449
450 fn mouse_moved(
451 editor: &mut Editor,
452 MouseMovedEvent {
453 modifiers: Modifiers { shift, cmd, .. },
454 position,
455 ..
456 }: MouseMovedEvent,
457 position_map: &PositionMap,
458 text_bounds: RectF,
459 cx: &mut ViewContext<Editor>,
460 ) -> bool {
461 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
462 // Don't trigger hover popover if mouse is hovering over context menu
463 if text_bounds.contains_point(position) {
464 let point_for_position = position_map.point_for_position(text_bounds, position);
465 match point_for_position.as_valid() {
466 Some(point) => {
467 update_go_to_definition_link(
468 editor,
469 Some(GoToDefinitionTrigger::Text(point)),
470 cmd,
471 shift,
472 cx,
473 );
474 hover_at(editor, Some(point), cx);
475 }
476 None => {
477 update_inlay_link_and_hover_points(
478 &position_map.snapshot,
479 point_for_position,
480 editor,
481 cmd,
482 shift,
483 cx,
484 );
485 }
486 }
487 } else {
488 update_go_to_definition_link(editor, None, cmd, shift, cx);
489 hover_at(editor, None, cx);
490 }
491
492 true
493 }
494
495 fn scroll(
496 editor: &mut Editor,
497 position: Vector2F,
498 mut delta: Vector2F,
499 precise: bool,
500 position_map: &PositionMap,
501 bounds: RectF,
502 cx: &mut ViewContext<Editor>,
503 ) -> bool {
504 if !bounds.contains_point(position) {
505 return false;
506 }
507
508 let line_height = position_map.line_height;
509 let max_glyph_width = position_map.em_width;
510
511 let axis = if precise {
512 //Trackpad
513 position_map.snapshot.ongoing_scroll.filter(&mut delta)
514 } else {
515 //Not trackpad
516 delta *= vec2f(max_glyph_width, line_height);
517 None //Resets ongoing scroll
518 };
519
520 let scroll_position = position_map.snapshot.scroll_position();
521 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
522 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
523 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
524 editor.scroll(scroll_position, axis, cx);
525
526 true
527 }
528
529 fn paint_background(
530 &self,
531 scene: &mut SceneBuilder,
532 gutter_bounds: RectF,
533 text_bounds: RectF,
534 layout: &LayoutState,
535 ) {
536 let bounds = gutter_bounds.union_rect(text_bounds);
537 let scroll_top =
538 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
539 scene.push_quad(Quad {
540 bounds: gutter_bounds,
541 background: Some(self.style.gutter_background),
542 border: Border::new(0., Color::transparent_black()),
543 corner_radii: Default::default(),
544 });
545 scene.push_quad(Quad {
546 bounds: text_bounds,
547 background: Some(self.style.background),
548 border: Border::new(0., Color::transparent_black()),
549 corner_radii: Default::default(),
550 });
551
552 if let EditorMode::Full = layout.mode {
553 let mut active_rows = layout.active_rows.iter().peekable();
554 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
555 let mut end_row = *start_row;
556 while active_rows.peek().map_or(false, |r| {
557 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
558 }) {
559 active_rows.next().unwrap();
560 end_row += 1;
561 }
562
563 if !contains_non_empty_selection {
564 let origin = vec2f(
565 bounds.origin_x(),
566 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
567 - scroll_top,
568 );
569 let size = vec2f(
570 bounds.width(),
571 layout.position_map.line_height * (end_row - start_row + 1) as f32,
572 );
573 scene.push_quad(Quad {
574 bounds: RectF::new(origin, size),
575 background: Some(self.style.active_line_background),
576 border: Border::default(),
577 corner_radii: Default::default(),
578 });
579 }
580 }
581
582 if let Some(highlighted_rows) = &layout.highlighted_rows {
583 let origin = vec2f(
584 bounds.origin_x(),
585 bounds.origin_y()
586 + (layout.position_map.line_height * highlighted_rows.start as f32)
587 - scroll_top,
588 );
589 let size = vec2f(
590 bounds.width(),
591 layout.position_map.line_height * highlighted_rows.len() as f32,
592 );
593 scene.push_quad(Quad {
594 bounds: RectF::new(origin, size),
595 background: Some(self.style.highlighted_line_background),
596 border: Border::default(),
597 corner_radii: Default::default(),
598 });
599 }
600
601 let scroll_left =
602 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
603
604 for (wrap_position, active) in layout.wrap_guides.iter() {
605 let x =
606 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
607 - scroll_left;
608
609 if x < text_bounds.origin_x()
610 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
611 {
612 continue;
613 }
614
615 let color = if *active {
616 self.style.active_wrap_guide
617 } else {
618 self.style.wrap_guide
619 };
620 scene.push_quad(Quad {
621 bounds: RectF::new(
622 vec2f(x, text_bounds.origin_y()),
623 vec2f(1., text_bounds.height()),
624 ),
625 background: Some(color),
626 border: Border::new(0., Color::transparent_black()),
627 corner_radii: Default::default(),
628 });
629 }
630 }
631 }
632
633 fn paint_gutter(
634 &mut self,
635 scene: &mut SceneBuilder,
636 bounds: RectF,
637 visible_bounds: RectF,
638 layout: &mut LayoutState,
639 editor: &mut Editor,
640 cx: &mut PaintContext<Editor>,
641 ) {
642 let line_height = layout.position_map.line_height;
643
644 let scroll_position = layout.position_map.snapshot.scroll_position();
645 let scroll_top = scroll_position.y() * line_height;
646
647 let show_gutter = matches!(
648 settings::get::<ProjectSettings>(cx).git.git_gutter,
649 Some(GitGutterSetting::TrackedFiles)
650 );
651
652 if show_gutter {
653 Self::paint_diff_hunks(scene, bounds, layout, cx);
654 }
655
656 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
657 if let Some(line) = line {
658 let line_origin = bounds.origin()
659 + vec2f(
660 bounds.width() - line.width() - layout.gutter_padding,
661 ix as f32 * line_height - (scroll_top % line_height),
662 );
663
664 line.paint(scene, line_origin, visible_bounds, line_height, cx);
665 }
666 }
667
668 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
669 if let Some(indicator) = fold_indicator.as_mut() {
670 let position = vec2f(
671 bounds.width() - layout.gutter_padding,
672 ix as f32 * line_height - (scroll_top % line_height),
673 );
674 let centering_offset = vec2f(
675 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
676 (line_height - indicator.size().y()) / 2.,
677 );
678
679 let indicator_origin = bounds.origin() + position + centering_offset;
680
681 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
682 }
683 }
684
685 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
686 let mut x = 0.;
687 let mut y = *row as f32 * line_height - scroll_top;
688 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
689 y += (line_height - indicator.size().y()) / 2.;
690 indicator.paint(
691 scene,
692 bounds.origin() + vec2f(x, y),
693 visible_bounds,
694 editor,
695 cx,
696 );
697 }
698 }
699
700 fn paint_diff_hunks(
701 scene: &mut SceneBuilder,
702 bounds: RectF,
703 layout: &mut LayoutState,
704 cx: &mut ViewContext<Editor>,
705 ) {
706 let diff_style = &theme::current(cx).editor.diff.clone();
707 let line_height = layout.position_map.line_height;
708
709 let scroll_position = layout.position_map.snapshot.scroll_position();
710 let scroll_top = scroll_position.y() * line_height;
711
712 for hunk in &layout.display_hunks {
713 let (display_row_range, status) = match hunk {
714 //TODO: This rendering is entirely a horrible hack
715 &DisplayDiffHunk::Folded { display_row: row } => {
716 let start_y = row as f32 * line_height - scroll_top;
717 let end_y = start_y + line_height;
718
719 let width = diff_style.removed_width_em * line_height;
720 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
721 let highlight_size = vec2f(width * 2., end_y - start_y);
722 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
723
724 scene.push_quad(Quad {
725 bounds: highlight_bounds,
726 background: Some(diff_style.modified),
727 border: Border::new(0., Color::transparent_black()),
728 corner_radii: (1. * line_height).into(),
729 });
730
731 continue;
732 }
733
734 DisplayDiffHunk::Unfolded {
735 display_row_range,
736 status,
737 } => (display_row_range, status),
738 };
739
740 let color = match status {
741 DiffHunkStatus::Added => diff_style.inserted,
742 DiffHunkStatus::Modified => diff_style.modified,
743
744 //TODO: This rendering is entirely a horrible hack
745 DiffHunkStatus::Removed => {
746 let row = display_row_range.start;
747
748 let offset = line_height / 2.;
749 let start_y = row as f32 * line_height - offset - scroll_top;
750 let end_y = start_y + line_height;
751
752 let width = diff_style.removed_width_em * line_height;
753 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
754 let highlight_size = vec2f(width * 2., end_y - start_y);
755 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
756
757 scene.push_quad(Quad {
758 bounds: highlight_bounds,
759 background: Some(diff_style.deleted),
760 border: Border::new(0., Color::transparent_black()),
761 corner_radii: (1. * line_height).into(),
762 });
763
764 continue;
765 }
766 };
767
768 let start_row = display_row_range.start;
769 let end_row = display_row_range.end;
770
771 let start_y = start_row as f32 * line_height - scroll_top;
772 let end_y = end_row as f32 * line_height - scroll_top;
773
774 let width = diff_style.width_em * line_height;
775 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
776 let highlight_size = vec2f(width * 2., end_y - start_y);
777 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
778
779 scene.push_quad(Quad {
780 bounds: highlight_bounds,
781 background: Some(color),
782 border: Border::new(0., Color::transparent_black()),
783 corner_radii: (diff_style.corner_radius * line_height).into(),
784 });
785 }
786 }
787
788 fn paint_text(
789 &mut self,
790 scene: &mut SceneBuilder,
791 bounds: RectF,
792 visible_bounds: RectF,
793 layout: &mut LayoutState,
794 editor: &mut Editor,
795 cx: &mut PaintContext<Editor>,
796 ) {
797 let style = &self.style;
798 let scroll_position = layout.position_map.snapshot.scroll_position();
799 let start_row = layout.visible_display_row_range.start;
800 let scroll_top = scroll_position.y() * layout.position_map.line_height;
801 let max_glyph_width = layout.position_map.em_width;
802 let scroll_left = scroll_position.x() * max_glyph_width;
803 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
804 let line_end_overshoot = 0.15 * layout.position_map.line_height;
805 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
806
807 scene.push_layer(Some(bounds));
808
809 scene.push_cursor_region(CursorRegion {
810 bounds,
811 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
812 CursorStyle::PointingHand
813 } else {
814 CursorStyle::IBeam
815 },
816 });
817
818 let fold_corner_radius =
819 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
820 for (id, range, color) in layout.fold_ranges.iter() {
821 self.paint_highlighted_range(
822 scene,
823 range.clone(),
824 *color,
825 fold_corner_radius,
826 fold_corner_radius * 2.,
827 layout,
828 content_origin,
829 scroll_top,
830 scroll_left,
831 bounds,
832 );
833
834 for bound in range_to_bounds(
835 &range,
836 content_origin,
837 scroll_left,
838 scroll_top,
839 &layout.visible_display_row_range,
840 line_end_overshoot,
841 &layout.position_map,
842 ) {
843 scene.push_cursor_region(CursorRegion {
844 bounds: bound,
845 style: CursorStyle::PointingHand,
846 });
847
848 let display_row = range.start.row();
849
850 let buffer_row = DisplayPoint::new(display_row, 0)
851 .to_point(&layout.position_map.snapshot.display_snapshot)
852 .row;
853
854 scene.push_mouse_region(
855 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
856 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
857 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
858 })
859 .with_notify_on_hover(true)
860 .with_notify_on_click(true),
861 )
862 }
863 }
864
865 for (range, color) in &layout.highlighted_ranges {
866 self.paint_highlighted_range(
867 scene,
868 range.clone(),
869 *color,
870 0.,
871 line_end_overshoot,
872 layout,
873 content_origin,
874 scroll_top,
875 scroll_left,
876 bounds,
877 );
878 }
879
880 let mut cursors = SmallVec::<[Cursor; 32]>::new();
881 let corner_radius = 0.15 * layout.position_map.line_height;
882 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
883
884 for (replica_id, selections) in &layout.selections {
885 let replica_id = *replica_id;
886 let selection_style = if let Some(replica_id) = replica_id {
887 style.replica_selection_style(replica_id)
888 } else {
889 &style.absent_selection
890 };
891
892 for selection in selections {
893 self.paint_highlighted_range(
894 scene,
895 selection.range.clone(),
896 selection_style.selection,
897 corner_radius,
898 corner_radius * 2.,
899 layout,
900 content_origin,
901 scroll_top,
902 scroll_left,
903 bounds,
904 );
905
906 if selection.is_local && !selection.range.is_empty() {
907 invisible_display_ranges.push(selection.range.clone());
908 }
909 if !selection.is_local || editor.show_local_cursors(cx) {
910 let cursor_position = selection.head;
911 if layout
912 .visible_display_row_range
913 .contains(&cursor_position.row())
914 {
915 let cursor_row_layout = &layout.position_map.line_layouts
916 [(cursor_position.row() - start_row) as usize]
917 .line;
918 let cursor_column = cursor_position.column() as usize;
919
920 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
921 let mut block_width =
922 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
923 if block_width == 0.0 {
924 block_width = layout.position_map.em_width;
925 }
926 let block_text = if let CursorShape::Block = selection.cursor_shape {
927 layout
928 .position_map
929 .snapshot
930 .chars_at(cursor_position)
931 .next()
932 .and_then(|(character, _)| {
933 let font_id =
934 cursor_row_layout.font_for_index(cursor_column)?;
935 let text = character.to_string();
936
937 Some(cx.text_layout_cache().layout_str(
938 &text,
939 cursor_row_layout.font_size(),
940 &[(
941 text.chars().count(),
942 RunStyle {
943 font_id,
944 color: style.background,
945 underline: Default::default(),
946 },
947 )],
948 ))
949 })
950 } else {
951 None
952 };
953
954 let x = cursor_character_x - scroll_left;
955 let y = cursor_position.row() as f32 * layout.position_map.line_height
956 - scroll_top;
957 if selection.is_newest {
958 editor.pixel_position_of_newest_cursor = Some(vec2f(
959 bounds.origin_x() + x + block_width / 2.,
960 bounds.origin_y() + y + layout.position_map.line_height / 2.,
961 ));
962 }
963 cursors.push(Cursor {
964 color: selection_style.cursor,
965 block_width,
966 origin: vec2f(x, y),
967 line_height: layout.position_map.line_height,
968 shape: selection.cursor_shape,
969 block_text,
970 });
971 }
972 }
973 }
974 }
975
976 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
977 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
978 let row = start_row + ix as u32;
979 line_with_invisibles.draw(
980 layout,
981 row,
982 scroll_top,
983 scene,
984 content_origin,
985 scroll_left,
986 visible_text_bounds,
987 whitespace_setting,
988 &invisible_display_ranges,
989 visible_bounds,
990 cx,
991 )
992 }
993 }
994
995 scene.paint_layer(Some(bounds), |scene| {
996 for cursor in cursors {
997 cursor.paint(scene, content_origin, cx);
998 }
999 });
1000
1001 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
1002 scene.push_stacking_context(None, None);
1003 let cursor_row_layout =
1004 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1005 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
1006 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
1007 let mut list_origin = content_origin + vec2f(x, y);
1008 let list_width = context_menu.size().x();
1009 let list_height = context_menu.size().y();
1010
1011 // Snap the right edge of the list to the right edge of the window if
1012 // its horizontal bounds overflow.
1013 if list_origin.x() + list_width > cx.window_size().x() {
1014 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
1015 }
1016
1017 if list_origin.y() + list_height > bounds.max_y() {
1018 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
1019 }
1020
1021 context_menu.paint(
1022 scene,
1023 list_origin,
1024 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1025 editor,
1026 cx,
1027 );
1028
1029 scene.pop_stacking_context();
1030 }
1031
1032 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
1033 scene.push_stacking_context(None, None);
1034
1035 // This is safe because we check on layout whether the required row is available
1036 let hovered_row_layout =
1037 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1038
1039 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1040 // height. This is the size we will use to decide whether to render popovers above or below
1041 // the hovered line.
1042 let first_size = hover_popovers[0].size();
1043 let height_to_reserve = first_size.y()
1044 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1045
1046 // Compute Hovered Point
1047 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1048 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1049 let hovered_point = content_origin + vec2f(x, y);
1050
1051 if hovered_point.y() - height_to_reserve > 0.0 {
1052 // There is enough space above. Render popovers above the hovered point
1053 let mut current_y = hovered_point.y();
1054 for hover_popover in hover_popovers {
1055 let size = hover_popover.size();
1056 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1057
1058 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1059 if x_out_of_bounds < 0.0 {
1060 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1061 }
1062
1063 hover_popover.paint(
1064 scene,
1065 popover_origin,
1066 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1067 editor,
1068 cx,
1069 );
1070
1071 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1072 }
1073 } else {
1074 // There is not enough space above. Render popovers below the hovered point
1075 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1076 for hover_popover in hover_popovers {
1077 let size = hover_popover.size();
1078 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1079
1080 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1081 if x_out_of_bounds < 0.0 {
1082 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1083 }
1084
1085 hover_popover.paint(
1086 scene,
1087 popover_origin,
1088 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1089 editor,
1090 cx,
1091 );
1092
1093 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1094 }
1095 }
1096
1097 scene.pop_stacking_context();
1098 }
1099
1100 scene.pop_layer();
1101 }
1102
1103 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1104 bounds.max_x() - self.style.theme.scrollbar.width
1105 }
1106
1107 fn paint_scrollbar(
1108 &mut self,
1109 scene: &mut SceneBuilder,
1110 bounds: RectF,
1111 layout: &mut LayoutState,
1112 cx: &mut ViewContext<Editor>,
1113 editor: &Editor,
1114 ) {
1115 enum ScrollbarMouseHandlers {}
1116 if layout.mode != EditorMode::Full {
1117 return;
1118 }
1119
1120 let style = &self.style.theme.scrollbar;
1121
1122 let top = bounds.min_y();
1123 let bottom = bounds.max_y();
1124 let right = bounds.max_x();
1125 let left = self.scrollbar_left(&bounds);
1126 let row_range = &layout.scrollbar_row_range;
1127 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1128
1129 let mut height = bounds.height();
1130 let mut first_row_y_offset = 0.0;
1131
1132 // Impose a minimum height on the scrollbar thumb
1133 let row_height = height / max_row;
1134 let min_thumb_height =
1135 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1136 let thumb_height = (row_range.end - row_range.start) * row_height;
1137 if thumb_height < min_thumb_height {
1138 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1139 height -= min_thumb_height - thumb_height;
1140 }
1141
1142 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1143
1144 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1145 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1146 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1147 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1148
1149 if layout.show_scrollbars {
1150 scene.push_quad(Quad {
1151 bounds: track_bounds,
1152 border: style.track.border,
1153 background: style.track.background_color,
1154 ..Default::default()
1155 });
1156 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1157 let theme = theme::current(cx);
1158 let scrollbar_theme = &theme.editor.scrollbar;
1159 if layout.is_singleton && scrollbar_settings.selections {
1160 let start_anchor = Anchor::min();
1161 let end_anchor = Anchor::max();
1162 let color = scrollbar_theme.selections;
1163 let border = Border {
1164 width: 1.,
1165 color: style.thumb.border.color,
1166 overlay: false,
1167 top: false,
1168 right: true,
1169 bottom: false,
1170 left: true,
1171 };
1172 let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1173 let start_y = y_for_row(start.row() as f32);
1174 let mut end_y = y_for_row(end.row() as f32);
1175 if end_y - start_y < 1. {
1176 end_y = start_y + 1.;
1177 }
1178 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1179
1180 scene.push_quad(Quad {
1181 bounds,
1182 background: Some(color),
1183 border,
1184 corner_radii: style.thumb.corner_radii.into(),
1185 })
1186 };
1187 let background_ranges = editor
1188 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1189 start_anchor..end_anchor,
1190 &layout.position_map.snapshot,
1191 50000,
1192 );
1193 for row in background_ranges {
1194 let start = row.start();
1195 let end = row.end();
1196 push_region(*start, *end);
1197 }
1198 }
1199
1200 if layout.is_singleton && scrollbar_settings.git_diff {
1201 let diff_style = scrollbar_theme.git.clone();
1202 for hunk in layout
1203 .position_map
1204 .snapshot
1205 .buffer_snapshot
1206 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1207 {
1208 let start_display = Point::new(hunk.buffer_range.start, 0)
1209 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1210 let end_display = Point::new(hunk.buffer_range.end, 0)
1211 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1212 let start_y = y_for_row(start_display.row() as f32);
1213 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1214 y_for_row((end_display.row() + 1) as f32)
1215 } else {
1216 y_for_row((end_display.row()) as f32)
1217 };
1218
1219 if end_y - start_y < 1. {
1220 end_y = start_y + 1.;
1221 }
1222 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1223
1224 let color = match hunk.status() {
1225 DiffHunkStatus::Added => diff_style.inserted,
1226 DiffHunkStatus::Modified => diff_style.modified,
1227 DiffHunkStatus::Removed => diff_style.deleted,
1228 };
1229
1230 let border = Border {
1231 width: 1.,
1232 color: style.thumb.border.color,
1233 overlay: false,
1234 top: false,
1235 right: true,
1236 bottom: false,
1237 left: true,
1238 };
1239
1240 scene.push_quad(Quad {
1241 bounds,
1242 background: Some(color),
1243 border,
1244 corner_radii: style.thumb.corner_radii.into(),
1245 })
1246 }
1247 }
1248
1249 scene.push_quad(Quad {
1250 bounds: thumb_bounds,
1251 border: style.thumb.border,
1252 background: style.thumb.background_color,
1253 corner_radii: style.thumb.corner_radii.into(),
1254 });
1255 }
1256
1257 scene.push_cursor_region(CursorRegion {
1258 bounds: track_bounds,
1259 style: CursorStyle::Arrow,
1260 });
1261 scene.push_mouse_region(
1262 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1263 .on_move(move |event, editor: &mut Editor, cx| {
1264 if event.pressed_button.is_none() {
1265 editor.scroll_manager.show_scrollbar(cx);
1266 }
1267 })
1268 .on_down(MouseButton::Left, {
1269 let row_range = row_range.clone();
1270 move |event, editor: &mut Editor, cx| {
1271 let y = event.position.y();
1272 if y < thumb_top || thumb_bottom < y {
1273 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1274 let top_row = center_row
1275 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1276 let mut position = editor.scroll_position(cx);
1277 position.set_y(top_row as f32);
1278 editor.set_scroll_position(position, cx);
1279 } else {
1280 editor.scroll_manager.show_scrollbar(cx);
1281 }
1282 }
1283 })
1284 .on_drag(MouseButton::Left, {
1285 move |event, editor: &mut Editor, cx| {
1286 if event.end {
1287 return;
1288 }
1289
1290 let y = event.prev_mouse_position.y();
1291 let new_y = event.position.y();
1292 if thumb_top < y && y < thumb_bottom {
1293 let mut position = editor.scroll_position(cx);
1294 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1295 if position.y() < 0.0 {
1296 position.set_y(0.);
1297 }
1298 editor.set_scroll_position(position, cx);
1299 }
1300 }
1301 }),
1302 );
1303 }
1304
1305 #[allow(clippy::too_many_arguments)]
1306 fn paint_highlighted_range(
1307 &self,
1308 scene: &mut SceneBuilder,
1309 range: Range<DisplayPoint>,
1310 color: Color,
1311 corner_radius: f32,
1312 line_end_overshoot: f32,
1313 layout: &LayoutState,
1314 content_origin: Vector2F,
1315 scroll_top: f32,
1316 scroll_left: f32,
1317 bounds: RectF,
1318 ) {
1319 let start_row = layout.visible_display_row_range.start;
1320 let end_row = layout.visible_display_row_range.end;
1321 if range.start != range.end {
1322 let row_range = if range.end.column() == 0 {
1323 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1324 } else {
1325 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1326 };
1327
1328 let highlighted_range = HighlightedRange {
1329 color,
1330 line_height: layout.position_map.line_height,
1331 corner_radius,
1332 start_y: content_origin.y()
1333 + row_range.start as f32 * layout.position_map.line_height
1334 - scroll_top,
1335 lines: row_range
1336 .into_iter()
1337 .map(|row| {
1338 let line_layout =
1339 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1340 HighlightedRangeLine {
1341 start_x: if row == range.start.row() {
1342 content_origin.x()
1343 + line_layout.x_for_index(range.start.column() as usize)
1344 - scroll_left
1345 } else {
1346 content_origin.x() - scroll_left
1347 },
1348 end_x: if row == range.end.row() {
1349 content_origin.x()
1350 + line_layout.x_for_index(range.end.column() as usize)
1351 - scroll_left
1352 } else {
1353 content_origin.x() + line_layout.width() + line_end_overshoot
1354 - scroll_left
1355 },
1356 }
1357 })
1358 .collect(),
1359 };
1360
1361 highlighted_range.paint(bounds, scene);
1362 }
1363 }
1364
1365 fn paint_blocks(
1366 &mut self,
1367 scene: &mut SceneBuilder,
1368 bounds: RectF,
1369 visible_bounds: RectF,
1370 layout: &mut LayoutState,
1371 editor: &mut Editor,
1372 cx: &mut PaintContext<Editor>,
1373 ) {
1374 let scroll_position = layout.position_map.snapshot.scroll_position();
1375 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1376 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1377
1378 for block in &mut layout.blocks {
1379 let mut origin = bounds.origin()
1380 + vec2f(
1381 0.,
1382 block.row as f32 * layout.position_map.line_height - scroll_top,
1383 );
1384 if !matches!(block.style, BlockStyle::Sticky) {
1385 origin += vec2f(-scroll_left, 0.);
1386 }
1387 block
1388 .element
1389 .paint(scene, origin, visible_bounds, editor, cx);
1390 }
1391 }
1392
1393 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1394 let style = &self.style;
1395
1396 cx.text_layout_cache()
1397 .layout_str(
1398 " ".repeat(column).as_str(),
1399 style.text.font_size,
1400 &[(
1401 column,
1402 RunStyle {
1403 font_id: style.text.font_id,
1404 color: Color::black(),
1405 underline: Default::default(),
1406 },
1407 )],
1408 )
1409 .width()
1410 }
1411
1412 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1413 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1414 self.column_pixels(digit_count, cx)
1415 }
1416
1417 //Folds contained in a hunk are ignored apart from shrinking visual size
1418 //If a fold contains any hunks then that fold line is marked as modified
1419 fn layout_git_gutters(
1420 &self,
1421 display_rows: Range<u32>,
1422 snapshot: &EditorSnapshot,
1423 ) -> Vec<DisplayDiffHunk> {
1424 let buffer_snapshot = &snapshot.buffer_snapshot;
1425
1426 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1427 .to_point(snapshot)
1428 .row;
1429 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1430 .to_point(snapshot)
1431 .row;
1432
1433 buffer_snapshot
1434 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1435 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1436 .dedup()
1437 .collect()
1438 }
1439
1440 fn calculate_relative_line_numbers(
1441 &self,
1442 snapshot: &EditorSnapshot,
1443 rows: &Range<u32>,
1444 relative_to: Option<u32>,
1445 ) -> HashMap<u32, u32> {
1446 let mut relative_rows: HashMap<u32, u32> = Default::default();
1447 let Some(relative_to) = relative_to else {
1448 return relative_rows;
1449 };
1450
1451 let start = rows.start.min(relative_to);
1452 let end = rows.end.max(relative_to);
1453
1454 let buffer_rows = snapshot
1455 .buffer_rows(start)
1456 .take(1 + (end - start) as usize)
1457 .collect::<Vec<_>>();
1458
1459 let head_idx = relative_to - start;
1460 let mut delta = 1;
1461 let mut i = head_idx + 1;
1462 while i < buffer_rows.len() as u32 {
1463 if buffer_rows[i as usize].is_some() {
1464 if rows.contains(&(i + start)) {
1465 relative_rows.insert(i + start, delta);
1466 }
1467 delta += 1;
1468 }
1469 i += 1;
1470 }
1471 delta = 1;
1472 i = head_idx.min(buffer_rows.len() as u32 - 1);
1473 while i > 0 && buffer_rows[i as usize].is_none() {
1474 i -= 1;
1475 }
1476
1477 while i > 0 {
1478 i -= 1;
1479 if buffer_rows[i as usize].is_some() {
1480 if rows.contains(&(i + start)) {
1481 relative_rows.insert(i + start, delta);
1482 }
1483 delta += 1;
1484 }
1485 }
1486
1487 relative_rows
1488 }
1489
1490 fn layout_line_numbers(
1491 &self,
1492 rows: Range<u32>,
1493 active_rows: &BTreeMap<u32, bool>,
1494 newest_selection_head: DisplayPoint,
1495 is_singleton: bool,
1496 snapshot: &EditorSnapshot,
1497 cx: &ViewContext<Editor>,
1498 ) -> (
1499 Vec<Option<text_layout::Line>>,
1500 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1501 ) {
1502 let style = &self.style;
1503 let include_line_numbers = snapshot.mode == EditorMode::Full;
1504 let mut line_number_layouts = Vec::with_capacity(rows.len());
1505 let mut fold_statuses = Vec::with_capacity(rows.len());
1506 let mut line_number = String::new();
1507 let is_relative = settings::get::<EditorSettings>(cx).relative_line_numbers;
1508 let relative_to = if is_relative {
1509 Some(newest_selection_head.row())
1510 } else {
1511 None
1512 };
1513
1514 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1515
1516 for (ix, row) in snapshot
1517 .buffer_rows(rows.start)
1518 .take((rows.end - rows.start) as usize)
1519 .enumerate()
1520 {
1521 let display_row = rows.start + ix as u32;
1522 let (active, color) = if active_rows.contains_key(&display_row) {
1523 (true, style.line_number_active)
1524 } else {
1525 (false, style.line_number)
1526 };
1527 if let Some(buffer_row) = row {
1528 if include_line_numbers {
1529 line_number.clear();
1530 let default_number = buffer_row + 1;
1531 let number = relative_rows
1532 .get(&(ix as u32 + rows.start))
1533 .unwrap_or(&default_number);
1534 write!(&mut line_number, "{}", number).unwrap();
1535 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1536 &line_number,
1537 style.text.font_size,
1538 &[(
1539 line_number.len(),
1540 RunStyle {
1541 font_id: style.text.font_id,
1542 color,
1543 underline: Default::default(),
1544 },
1545 )],
1546 )));
1547 fold_statuses.push(
1548 is_singleton
1549 .then(|| {
1550 snapshot
1551 .fold_for_line(buffer_row)
1552 .map(|fold_status| (fold_status, buffer_row, active))
1553 })
1554 .flatten(),
1555 )
1556 }
1557 } else {
1558 fold_statuses.push(None);
1559 line_number_layouts.push(None);
1560 }
1561 }
1562
1563 (line_number_layouts, fold_statuses)
1564 }
1565
1566 fn layout_lines(
1567 &mut self,
1568 rows: Range<u32>,
1569 line_number_layouts: &[Option<Line>],
1570 snapshot: &EditorSnapshot,
1571 cx: &ViewContext<Editor>,
1572 ) -> Vec<LineWithInvisibles> {
1573 if rows.start >= rows.end {
1574 return Vec::new();
1575 }
1576
1577 // When the editor is empty and unfocused, then show the placeholder.
1578 if snapshot.is_empty() {
1579 let placeholder_style = self
1580 .style
1581 .placeholder_text
1582 .as_ref()
1583 .unwrap_or(&self.style.text);
1584 let placeholder_text = snapshot.placeholder_text();
1585 let placeholder_lines = placeholder_text
1586 .as_ref()
1587 .map_or("", AsRef::as_ref)
1588 .split('\n')
1589 .skip(rows.start as usize)
1590 .chain(iter::repeat(""))
1591 .take(rows.len());
1592 placeholder_lines
1593 .map(|line| {
1594 cx.text_layout_cache().layout_str(
1595 line,
1596 placeholder_style.font_size,
1597 &[(
1598 line.len(),
1599 RunStyle {
1600 font_id: placeholder_style.font_id,
1601 color: placeholder_style.color,
1602 underline: Default::default(),
1603 },
1604 )],
1605 )
1606 })
1607 .map(|line| LineWithInvisibles {
1608 line,
1609 invisibles: Vec::new(),
1610 })
1611 .collect()
1612 } else {
1613 let style = &self.style;
1614 let chunks = snapshot
1615 .chunks(
1616 rows.clone(),
1617 true,
1618 Some(style.theme.hint),
1619 Some(style.theme.suggestion),
1620 )
1621 .map(|chunk| {
1622 let mut highlight_style = chunk
1623 .syntax_highlight_id
1624 .and_then(|id| id.style(&style.syntax));
1625
1626 if let Some(chunk_highlight) = chunk.highlight_style {
1627 if let Some(highlight_style) = highlight_style.as_mut() {
1628 highlight_style.highlight(chunk_highlight);
1629 } else {
1630 highlight_style = Some(chunk_highlight);
1631 }
1632 }
1633
1634 let mut diagnostic_highlight = HighlightStyle::default();
1635
1636 if chunk.is_unnecessary {
1637 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1638 }
1639
1640 if let Some(severity) = chunk.diagnostic_severity {
1641 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1642 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1643 let diagnostic_style = super::diagnostic_style(severity, true, style);
1644 diagnostic_highlight.underline = Some(Underline {
1645 color: Some(diagnostic_style.message.text.color),
1646 thickness: 1.0.into(),
1647 squiggly: true,
1648 });
1649 }
1650 }
1651
1652 if let Some(highlight_style) = highlight_style.as_mut() {
1653 highlight_style.highlight(diagnostic_highlight);
1654 } else {
1655 highlight_style = Some(diagnostic_highlight);
1656 }
1657
1658 HighlightedChunk {
1659 chunk: chunk.text,
1660 style: highlight_style,
1661 is_tab: chunk.is_tab,
1662 }
1663 });
1664
1665 LineWithInvisibles::from_chunks(
1666 chunks,
1667 &style.text,
1668 cx.text_layout_cache(),
1669 cx.font_cache(),
1670 MAX_LINE_LEN,
1671 rows.len() as usize,
1672 line_number_layouts,
1673 snapshot.mode,
1674 )
1675 }
1676 }
1677
1678 #[allow(clippy::too_many_arguments)]
1679 fn layout_blocks(
1680 &mut self,
1681 rows: Range<u32>,
1682 snapshot: &EditorSnapshot,
1683 editor_width: f32,
1684 scroll_width: f32,
1685 gutter_padding: f32,
1686 gutter_width: f32,
1687 em_width: f32,
1688 text_x: f32,
1689 line_height: f32,
1690 style: &EditorStyle,
1691 line_layouts: &[LineWithInvisibles],
1692 editor: &mut Editor,
1693 cx: &mut LayoutContext<Editor>,
1694 ) -> (f32, Vec<BlockLayout>) {
1695 let mut block_id = 0;
1696 let scroll_x = snapshot.scroll_anchor.offset.x();
1697 let (fixed_blocks, non_fixed_blocks) = snapshot
1698 .blocks_in_range(rows.clone())
1699 .partition::<Vec<_>, _>(|(_, block)| match block {
1700 TransformBlock::ExcerptHeader { .. } => false,
1701 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1702 });
1703 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1704 let mut element = match block {
1705 TransformBlock::Custom(block) => {
1706 let align_to = block
1707 .position()
1708 .to_point(&snapshot.buffer_snapshot)
1709 .to_display_point(snapshot);
1710 let anchor_x = text_x
1711 + if rows.contains(&align_to.row()) {
1712 line_layouts[(align_to.row() - rows.start) as usize]
1713 .line
1714 .x_for_index(align_to.column() as usize)
1715 } else {
1716 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1717 .x_for_index(align_to.column() as usize)
1718 };
1719
1720 block.render(&mut BlockContext {
1721 view_context: cx,
1722 anchor_x,
1723 gutter_padding,
1724 line_height,
1725 scroll_x,
1726 gutter_width,
1727 em_width,
1728 block_id,
1729 })
1730 }
1731 TransformBlock::ExcerptHeader {
1732 id,
1733 buffer,
1734 range,
1735 starts_new_buffer,
1736 ..
1737 } => {
1738 let tooltip_style = theme::current(cx).tooltip.clone();
1739 let include_root = editor
1740 .project
1741 .as_ref()
1742 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1743 .unwrap_or_default();
1744 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1745 let jump_path = ProjectPath {
1746 worktree_id: file.worktree_id(cx),
1747 path: file.path.clone(),
1748 };
1749 let jump_anchor = range
1750 .primary
1751 .as_ref()
1752 .map_or(range.context.start, |primary| primary.start);
1753 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1754
1755 enum JumpIcon {}
1756 MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
1757 let style = style.jump_icon.style_for(state);
1758 Svg::new("icons/arrow_up_right_8.svg")
1759 .with_color(style.color)
1760 .constrained()
1761 .with_width(style.icon_width)
1762 .aligned()
1763 .contained()
1764 .with_style(style.container)
1765 .constrained()
1766 .with_width(style.button_width)
1767 .with_height(style.button_width)
1768 })
1769 .with_cursor_style(CursorStyle::PointingHand)
1770 .on_click(MouseButton::Left, move |_, editor, cx| {
1771 if let Some(workspace) = editor
1772 .workspace
1773 .as_ref()
1774 .and_then(|(workspace, _)| workspace.upgrade(cx))
1775 {
1776 workspace.update(cx, |workspace, cx| {
1777 Editor::jump(
1778 workspace,
1779 jump_path.clone(),
1780 jump_position,
1781 jump_anchor,
1782 cx,
1783 );
1784 });
1785 }
1786 })
1787 .with_tooltip::<JumpIcon>(
1788 (*id).into(),
1789 "Jump to Buffer".to_string(),
1790 Some(Box::new(crate::OpenExcerpts)),
1791 tooltip_style.clone(),
1792 cx,
1793 )
1794 .aligned()
1795 .flex_float()
1796 });
1797
1798 if *starts_new_buffer {
1799 let editor_font_size = style.text.font_size;
1800 let style = &style.diagnostic_path_header;
1801 let font_size = (style.text_scale_factor * editor_font_size).round();
1802
1803 let path = buffer.resolve_file_path(cx, include_root);
1804 let mut filename = None;
1805 let mut parent_path = None;
1806 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1807 if let Some(path) = path {
1808 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1809 parent_path =
1810 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1811 }
1812
1813 Flex::row()
1814 .with_child(
1815 Label::new(
1816 filename.unwrap_or_else(|| "untitled".to_string()),
1817 style.filename.text.clone().with_font_size(font_size),
1818 )
1819 .contained()
1820 .with_style(style.filename.container)
1821 .aligned(),
1822 )
1823 .with_children(parent_path.map(|path| {
1824 Label::new(path, style.path.text.clone().with_font_size(font_size))
1825 .contained()
1826 .with_style(style.path.container)
1827 .aligned()
1828 }))
1829 .with_children(jump_icon)
1830 .contained()
1831 .with_style(style.container)
1832 .with_padding_left(gutter_padding)
1833 .with_padding_right(gutter_padding)
1834 .expanded()
1835 .into_any_named("path header block")
1836 } else {
1837 let text_style = style.text.clone();
1838 Flex::row()
1839 .with_child(Label::new("⋯", text_style))
1840 .with_children(jump_icon)
1841 .contained()
1842 .with_padding_left(gutter_padding)
1843 .with_padding_right(gutter_padding)
1844 .expanded()
1845 .into_any_named("collapsed context")
1846 }
1847 }
1848 };
1849
1850 element.layout(
1851 SizeConstraint {
1852 min: Vector2F::zero(),
1853 max: vec2f(width, block.height() as f32 * line_height),
1854 },
1855 editor,
1856 cx,
1857 );
1858 element
1859 };
1860
1861 let mut fixed_block_max_width = 0f32;
1862 let mut blocks = Vec::new();
1863 for (row, block) in fixed_blocks {
1864 let element = render_block(block, f32::INFINITY, block_id);
1865 block_id += 1;
1866 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1867 blocks.push(BlockLayout {
1868 row,
1869 element,
1870 style: BlockStyle::Fixed,
1871 });
1872 }
1873 for (row, block) in non_fixed_blocks {
1874 let style = match block {
1875 TransformBlock::Custom(block) => block.style(),
1876 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1877 };
1878 let width = match style {
1879 BlockStyle::Sticky => editor_width,
1880 BlockStyle::Flex => editor_width
1881 .max(fixed_block_max_width)
1882 .max(gutter_width + scroll_width),
1883 BlockStyle::Fixed => unreachable!(),
1884 };
1885 let element = render_block(block, width, block_id);
1886 block_id += 1;
1887 blocks.push(BlockLayout {
1888 row,
1889 element,
1890 style,
1891 });
1892 }
1893 (
1894 scroll_width.max(fixed_block_max_width - gutter_width),
1895 blocks,
1896 )
1897 }
1898}
1899
1900struct HighlightedChunk<'a> {
1901 chunk: &'a str,
1902 style: Option<HighlightStyle>,
1903 is_tab: bool,
1904}
1905
1906#[derive(Debug)]
1907pub struct LineWithInvisibles {
1908 pub line: Line,
1909 invisibles: Vec<Invisible>,
1910}
1911
1912impl LineWithInvisibles {
1913 fn from_chunks<'a>(
1914 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1915 text_style: &TextStyle,
1916 text_layout_cache: &TextLayoutCache,
1917 font_cache: &Arc<FontCache>,
1918 max_line_len: usize,
1919 max_line_count: usize,
1920 line_number_layouts: &[Option<Line>],
1921 editor_mode: EditorMode,
1922 ) -> Vec<Self> {
1923 let mut layouts = Vec::with_capacity(max_line_count);
1924 let mut line = String::new();
1925 let mut invisibles = Vec::new();
1926 let mut styles = Vec::new();
1927 let mut non_whitespace_added = false;
1928 let mut row = 0;
1929 let mut line_exceeded_max_len = false;
1930 for highlighted_chunk in chunks.chain([HighlightedChunk {
1931 chunk: "\n",
1932 style: None,
1933 is_tab: false,
1934 }]) {
1935 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1936 if ix > 0 {
1937 layouts.push(Self {
1938 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1939 invisibles: invisibles.drain(..).collect(),
1940 });
1941
1942 line.clear();
1943 styles.clear();
1944 row += 1;
1945 line_exceeded_max_len = false;
1946 non_whitespace_added = false;
1947 if row == max_line_count {
1948 return layouts;
1949 }
1950 }
1951
1952 if !line_chunk.is_empty() && !line_exceeded_max_len {
1953 let text_style = if let Some(style) = highlighted_chunk.style {
1954 text_style
1955 .clone()
1956 .highlight(style, font_cache)
1957 .map(Cow::Owned)
1958 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1959 } else {
1960 Cow::Borrowed(text_style)
1961 };
1962
1963 if line.len() + line_chunk.len() > max_line_len {
1964 let mut chunk_len = max_line_len - line.len();
1965 while !line_chunk.is_char_boundary(chunk_len) {
1966 chunk_len -= 1;
1967 }
1968 line_chunk = &line_chunk[..chunk_len];
1969 line_exceeded_max_len = true;
1970 }
1971
1972 styles.push((
1973 line_chunk.len(),
1974 RunStyle {
1975 font_id: text_style.font_id,
1976 color: text_style.color,
1977 underline: text_style.underline,
1978 },
1979 ));
1980
1981 if editor_mode == EditorMode::Full {
1982 // Line wrap pads its contents with fake whitespaces,
1983 // avoid printing them
1984 let inside_wrapped_string = line_number_layouts
1985 .get(row)
1986 .and_then(|layout| layout.as_ref())
1987 .is_none();
1988 if highlighted_chunk.is_tab {
1989 if non_whitespace_added || !inside_wrapped_string {
1990 invisibles.push(Invisible::Tab {
1991 line_start_offset: line.len(),
1992 });
1993 }
1994 } else {
1995 invisibles.extend(
1996 line_chunk
1997 .chars()
1998 .enumerate()
1999 .filter(|(_, line_char)| {
2000 let is_whitespace = line_char.is_whitespace();
2001 non_whitespace_added |= !is_whitespace;
2002 is_whitespace
2003 && (non_whitespace_added || !inside_wrapped_string)
2004 })
2005 .map(|(whitespace_index, _)| Invisible::Whitespace {
2006 line_offset: line.len() + whitespace_index,
2007 }),
2008 )
2009 }
2010 }
2011
2012 line.push_str(line_chunk);
2013 }
2014 }
2015 }
2016
2017 layouts
2018 }
2019
2020 fn draw(
2021 &self,
2022 layout: &LayoutState,
2023 row: u32,
2024 scroll_top: f32,
2025 scene: &mut SceneBuilder,
2026 content_origin: Vector2F,
2027 scroll_left: f32,
2028 visible_text_bounds: RectF,
2029 whitespace_setting: ShowWhitespaceSetting,
2030 selection_ranges: &[Range<DisplayPoint>],
2031 visible_bounds: RectF,
2032 cx: &mut ViewContext<Editor>,
2033 ) {
2034 let line_height = layout.position_map.line_height;
2035 let line_y = row as f32 * line_height - scroll_top;
2036
2037 self.line.paint(
2038 scene,
2039 content_origin + vec2f(-scroll_left, line_y),
2040 visible_text_bounds,
2041 line_height,
2042 cx,
2043 );
2044
2045 self.draw_invisibles(
2046 &selection_ranges,
2047 layout,
2048 content_origin,
2049 scroll_left,
2050 line_y,
2051 row,
2052 scene,
2053 visible_bounds,
2054 line_height,
2055 whitespace_setting,
2056 cx,
2057 );
2058 }
2059
2060 fn draw_invisibles(
2061 &self,
2062 selection_ranges: &[Range<DisplayPoint>],
2063 layout: &LayoutState,
2064 content_origin: Vector2F,
2065 scroll_left: f32,
2066 line_y: f32,
2067 row: u32,
2068 scene: &mut SceneBuilder,
2069 visible_bounds: RectF,
2070 line_height: f32,
2071 whitespace_setting: ShowWhitespaceSetting,
2072 cx: &mut ViewContext<Editor>,
2073 ) {
2074 let allowed_invisibles_regions = match whitespace_setting {
2075 ShowWhitespaceSetting::None => return,
2076 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2077 ShowWhitespaceSetting::All => None,
2078 };
2079
2080 for invisible in &self.invisibles {
2081 let (&token_offset, invisible_symbol) = match invisible {
2082 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2083 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2084 };
2085
2086 let x_offset = self.line.x_for_index(token_offset);
2087 let invisible_offset =
2088 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2089 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2090
2091 if let Some(allowed_regions) = allowed_invisibles_regions {
2092 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2093 if !allowed_regions
2094 .iter()
2095 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2096 {
2097 continue;
2098 }
2099 }
2100 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2101 }
2102 }
2103}
2104
2105#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2106enum Invisible {
2107 Tab { line_start_offset: usize },
2108 Whitespace { line_offset: usize },
2109}
2110
2111impl Element<Editor> for EditorElement {
2112 type LayoutState = LayoutState;
2113 type PaintState = ();
2114
2115 fn layout(
2116 &mut self,
2117 constraint: SizeConstraint,
2118 editor: &mut Editor,
2119 cx: &mut LayoutContext<Editor>,
2120 ) -> (Vector2F, Self::LayoutState) {
2121 let mut size = constraint.max;
2122 if size.x().is_infinite() {
2123 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2124 }
2125
2126 let snapshot = editor.snapshot(cx);
2127 let style = self.style.clone();
2128
2129 let line_height = (style.text.font_size * style.line_height_scalar).round();
2130
2131 let gutter_padding;
2132 let gutter_width;
2133 let gutter_margin;
2134 if snapshot.show_gutter {
2135 let em_width = style.text.em_width(cx.font_cache());
2136 gutter_padding = (em_width * style.gutter_padding_factor).round();
2137 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2138 gutter_margin = -style.text.descent(cx.font_cache());
2139 } else {
2140 gutter_padding = 0.0;
2141 gutter_width = 0.0;
2142 gutter_margin = 0.0;
2143 };
2144
2145 let text_width = size.x() - gutter_width;
2146 let em_width = style.text.em_width(cx.font_cache());
2147 let em_advance = style.text.em_advance(cx.font_cache());
2148 let overscroll = vec2f(em_width, 0.);
2149 let snapshot = {
2150 editor.set_visible_line_count(size.y() / line_height, cx);
2151
2152 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2153 let wrap_width = match editor.soft_wrap_mode(cx) {
2154 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2155 SoftWrap::EditorWidth => editor_width,
2156 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2157 };
2158
2159 if editor.set_wrap_width(Some(wrap_width), cx) {
2160 editor.snapshot(cx)
2161 } else {
2162 snapshot
2163 }
2164 };
2165
2166 let wrap_guides = editor
2167 .wrap_guides(cx)
2168 .iter()
2169 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2170 .collect();
2171
2172 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2173 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2174 size.set_y(
2175 scroll_height
2176 .min(constraint.max_along(Axis::Vertical))
2177 .max(constraint.min_along(Axis::Vertical))
2178 .max(line_height)
2179 .min(line_height * max_lines as f32),
2180 )
2181 } else if let EditorMode::SingleLine = snapshot.mode {
2182 size.set_y(line_height.max(constraint.min_along(Axis::Vertical)))
2183 } else if size.y().is_infinite() {
2184 size.set_y(scroll_height);
2185 }
2186 let gutter_size = vec2f(gutter_width, size.y());
2187 let text_size = vec2f(text_width, size.y());
2188
2189 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2190 let mut snapshot = editor.snapshot(cx);
2191
2192 let scroll_position = snapshot.scroll_position();
2193 // The scroll position is a fractional point, the whole number of which represents
2194 // the top of the window in terms of display rows.
2195 let start_row = scroll_position.y() as u32;
2196 let height_in_lines = size.y() / line_height;
2197 let max_row = snapshot.max_point().row();
2198
2199 // Add 1 to ensure selections bleed off screen
2200 let end_row = 1 + cmp::min(
2201 (scroll_position.y() + height_in_lines).ceil() as u32,
2202 max_row,
2203 );
2204
2205 let start_anchor = if start_row == 0 {
2206 Anchor::min()
2207 } else {
2208 snapshot
2209 .buffer_snapshot
2210 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2211 };
2212 let end_anchor = if end_row > max_row {
2213 Anchor::max()
2214 } else {
2215 snapshot
2216 .buffer_snapshot
2217 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2218 };
2219
2220 let mut selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)> = Vec::new();
2221 let mut active_rows = BTreeMap::new();
2222 let mut fold_ranges = Vec::new();
2223 let is_singleton = editor.is_singleton(cx);
2224
2225 let highlighted_rows = editor.highlighted_rows();
2226 let theme = theme::current(cx);
2227 let highlighted_ranges = editor.background_highlights_in_range(
2228 start_anchor..end_anchor,
2229 &snapshot.display_snapshot,
2230 theme.as_ref(),
2231 );
2232
2233 fold_ranges.extend(
2234 snapshot
2235 .folds_in_range(start_anchor..end_anchor)
2236 .map(|anchor| {
2237 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2238 (
2239 start.row,
2240 start.to_display_point(&snapshot.display_snapshot)
2241 ..anchor.end.to_display_point(&snapshot),
2242 )
2243 }),
2244 );
2245
2246 let mut remote_selections = HashMap::default();
2247 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2248 .buffer_snapshot
2249 .remote_selections_in_range(&(start_anchor..end_anchor))
2250 {
2251 let replica_id = if let Some(mapping) = &editor.replica_id_mapping {
2252 mapping.get(&replica_id).copied()
2253 } else {
2254 None
2255 };
2256
2257 // The local selections match the leader's selections.
2258 if replica_id.is_some() && replica_id == editor.leader_replica_id {
2259 continue;
2260 }
2261 remote_selections
2262 .entry(replica_id)
2263 .or_insert(Vec::new())
2264 .push(SelectionLayout::new(
2265 selection,
2266 line_mode,
2267 cursor_shape,
2268 &snapshot.display_snapshot,
2269 false,
2270 false,
2271 ));
2272 }
2273 selections.extend(remote_selections);
2274
2275 let mut newest_selection_head = None;
2276
2277 if editor.show_local_selections {
2278 let mut local_selections: Vec<Selection<Point>> = editor
2279 .selections
2280 .disjoint_in_range(start_anchor..end_anchor, cx);
2281 local_selections.extend(editor.selections.pending(cx));
2282 let mut layouts = Vec::new();
2283 let newest = editor.selections.newest(cx);
2284 for selection in local_selections.drain(..) {
2285 let is_empty = selection.start == selection.end;
2286 let is_newest = selection == newest;
2287
2288 let layout = SelectionLayout::new(
2289 selection,
2290 editor.selections.line_mode,
2291 editor.cursor_shape,
2292 &snapshot.display_snapshot,
2293 is_newest,
2294 true,
2295 );
2296 if is_newest {
2297 newest_selection_head = Some(layout.head);
2298 }
2299
2300 for row in cmp::max(layout.active_rows.start, start_row)
2301 ..=cmp::min(layout.active_rows.end, end_row)
2302 {
2303 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2304 *contains_non_empty_selection |= !is_empty;
2305 }
2306 layouts.push(layout);
2307 }
2308
2309 // Render the local selections in the leader's color when following.
2310 let local_replica_id = if let Some(leader_replica_id) = editor.leader_replica_id {
2311 leader_replica_id
2312 } else {
2313 let replica_id = editor.replica_id(cx);
2314 if let Some(mapping) = &editor.replica_id_mapping {
2315 mapping.get(&replica_id).copied().unwrap_or(replica_id)
2316 } else {
2317 replica_id
2318 }
2319 };
2320
2321 selections.push((Some(local_replica_id), layouts));
2322 }
2323
2324 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2325 let show_scrollbars = match scrollbar_settings.show {
2326 ShowScrollbar::Auto => {
2327 // Git
2328 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2329 ||
2330 // Selections
2331 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2332 // Scrollmanager
2333 || editor.scroll_manager.scrollbars_visible()
2334 }
2335 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2336 ShowScrollbar::Always => true,
2337 ShowScrollbar::Never => false,
2338 };
2339
2340 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2341 .into_iter()
2342 .map(|(id, fold)| {
2343 let color = self
2344 .style
2345 .folds
2346 .ellipses
2347 .background
2348 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2349 .color;
2350
2351 (id, fold, color)
2352 })
2353 .collect();
2354
2355 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
2356 let newest = editor.selections.newest::<Point>(cx);
2357 SelectionLayout::new(
2358 newest,
2359 editor.selections.line_mode,
2360 editor.cursor_shape,
2361 &snapshot.display_snapshot,
2362 true,
2363 true,
2364 )
2365 .head
2366 });
2367
2368 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2369 start_row..end_row,
2370 &active_rows,
2371 head_for_relative,
2372 is_singleton,
2373 &snapshot,
2374 cx,
2375 );
2376
2377 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2378
2379 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2380
2381 let mut max_visible_line_width = 0.0;
2382 let line_layouts =
2383 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2384 for line_with_invisibles in &line_layouts {
2385 if line_with_invisibles.line.width() > max_visible_line_width {
2386 max_visible_line_width = line_with_invisibles.line.width();
2387 }
2388 }
2389
2390 let style = self.style.clone();
2391 let longest_line_width = layout_line(
2392 snapshot.longest_row(),
2393 &snapshot,
2394 &style,
2395 cx.text_layout_cache(),
2396 )
2397 .width();
2398 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2399 let em_width = style.text.em_width(cx.font_cache());
2400 let (scroll_width, blocks) = self.layout_blocks(
2401 start_row..end_row,
2402 &snapshot,
2403 size.x(),
2404 scroll_width,
2405 gutter_padding,
2406 gutter_width,
2407 em_width,
2408 gutter_width + gutter_margin,
2409 line_height,
2410 &style,
2411 &line_layouts,
2412 editor,
2413 cx,
2414 );
2415
2416 let scroll_max = vec2f(
2417 ((scroll_width - text_size.x()) / em_width).max(0.0),
2418 max_row as f32,
2419 );
2420
2421 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2422
2423 let autoscrolled = if autoscroll_horizontally {
2424 editor.autoscroll_horizontally(
2425 start_row,
2426 text_size.x(),
2427 scroll_width,
2428 em_width,
2429 &line_layouts,
2430 cx,
2431 )
2432 } else {
2433 false
2434 };
2435
2436 if clamped || autoscrolled {
2437 snapshot = editor.snapshot(cx);
2438 }
2439
2440 let style = editor.style(cx);
2441
2442 let mut context_menu = None;
2443 let mut code_actions_indicator = None;
2444 if let Some(newest_selection_head) = newest_selection_head {
2445 if (start_row..end_row).contains(&newest_selection_head.row()) {
2446 if editor.context_menu_visible() {
2447 context_menu =
2448 editor.render_context_menu(newest_selection_head, style.clone(), cx);
2449 }
2450
2451 let active = matches!(
2452 editor.context_menu,
2453 Some(crate::ContextMenu::CodeActions(_))
2454 );
2455
2456 code_actions_indicator = editor
2457 .render_code_actions_indicator(&style, active, cx)
2458 .map(|indicator| (newest_selection_head.row(), indicator));
2459 }
2460 }
2461
2462 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2463 let mut hover = editor
2464 .hover_state
2465 .render(&snapshot, &style, visible_rows, cx);
2466 let mode = editor.mode;
2467
2468 let mut fold_indicators = editor.render_fold_indicators(
2469 fold_statuses,
2470 &style,
2471 editor.gutter_hovered,
2472 line_height,
2473 gutter_margin,
2474 cx,
2475 );
2476
2477 if let Some((_, context_menu)) = context_menu.as_mut() {
2478 context_menu.layout(
2479 SizeConstraint {
2480 min: Vector2F::zero(),
2481 max: vec2f(
2482 cx.window_size().x() * 0.7,
2483 (12. * line_height).min((size.y() - line_height) / 2.),
2484 ),
2485 },
2486 editor,
2487 cx,
2488 );
2489 }
2490
2491 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2492 indicator.layout(
2493 SizeConstraint::strict_along(
2494 Axis::Vertical,
2495 line_height * style.code_actions.vertical_scale,
2496 ),
2497 editor,
2498 cx,
2499 );
2500 }
2501
2502 for fold_indicator in fold_indicators.iter_mut() {
2503 if let Some(indicator) = fold_indicator.as_mut() {
2504 indicator.layout(
2505 SizeConstraint::strict_along(
2506 Axis::Vertical,
2507 line_height * style.code_actions.vertical_scale,
2508 ),
2509 editor,
2510 cx,
2511 );
2512 }
2513 }
2514
2515 if let Some((_, hover_popovers)) = hover.as_mut() {
2516 for hover_popover in hover_popovers.iter_mut() {
2517 hover_popover.layout(
2518 SizeConstraint {
2519 min: Vector2F::zero(),
2520 max: vec2f(
2521 (120. * em_width) // Default size
2522 .min(size.x() / 2.) // Shrink to half of the editor width
2523 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2524 (16. * line_height) // Default size
2525 .min(size.y() / 2.) // Shrink to half of the editor height
2526 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2527 ),
2528 },
2529 editor,
2530 cx,
2531 );
2532 }
2533 }
2534
2535 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2536 let invisible_symbol_style = RunStyle {
2537 color: self.style.whitespace,
2538 font_id: self.style.text.font_id,
2539 underline: Default::default(),
2540 };
2541
2542 (
2543 size,
2544 LayoutState {
2545 mode,
2546 position_map: Arc::new(PositionMap {
2547 size,
2548 scroll_max,
2549 line_layouts,
2550 line_height,
2551 em_width,
2552 em_advance,
2553 snapshot,
2554 }),
2555 visible_display_row_range: start_row..end_row,
2556 wrap_guides,
2557 gutter_size,
2558 gutter_padding,
2559 text_size,
2560 scrollbar_row_range,
2561 show_scrollbars,
2562 is_singleton,
2563 max_row,
2564 gutter_margin,
2565 active_rows,
2566 highlighted_rows,
2567 highlighted_ranges,
2568 fold_ranges,
2569 line_number_layouts,
2570 display_hunks,
2571 blocks,
2572 selections,
2573 context_menu,
2574 code_actions_indicator,
2575 fold_indicators,
2576 tab_invisible: cx.text_layout_cache().layout_str(
2577 "→",
2578 invisible_symbol_font_size,
2579 &[("→".len(), invisible_symbol_style)],
2580 ),
2581 space_invisible: cx.text_layout_cache().layout_str(
2582 "•",
2583 invisible_symbol_font_size,
2584 &[("•".len(), invisible_symbol_style)],
2585 ),
2586 hover_popovers: hover,
2587 },
2588 )
2589 }
2590
2591 fn paint(
2592 &mut self,
2593 scene: &mut SceneBuilder,
2594 bounds: RectF,
2595 visible_bounds: RectF,
2596 layout: &mut Self::LayoutState,
2597 editor: &mut Editor,
2598 cx: &mut PaintContext<Editor>,
2599 ) -> Self::PaintState {
2600 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2601 scene.push_layer(Some(visible_bounds));
2602
2603 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2604 let text_bounds = RectF::new(
2605 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2606 layout.text_size,
2607 );
2608
2609 Self::attach_mouse_handlers(
2610 scene,
2611 &layout.position_map,
2612 layout.hover_popovers.is_some(),
2613 visible_bounds,
2614 text_bounds,
2615 gutter_bounds,
2616 bounds,
2617 cx,
2618 );
2619
2620 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2621 if layout.gutter_size.x() > 0. {
2622 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2623 }
2624 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2625
2626 scene.push_layer(Some(bounds));
2627 if !layout.blocks.is_empty() {
2628 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2629 }
2630 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2631 scene.pop_layer();
2632
2633 scene.pop_layer();
2634 }
2635
2636 fn rect_for_text_range(
2637 &self,
2638 range_utf16: Range<usize>,
2639 bounds: RectF,
2640 _: RectF,
2641 layout: &Self::LayoutState,
2642 _: &Self::PaintState,
2643 _: &Editor,
2644 _: &ViewContext<Editor>,
2645 ) -> Option<RectF> {
2646 let text_bounds = RectF::new(
2647 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2648 layout.text_size,
2649 );
2650 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2651 let scroll_position = layout.position_map.snapshot.scroll_position();
2652 let start_row = scroll_position.y() as u32;
2653 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2654 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2655
2656 let range_start = OffsetUtf16(range_utf16.start)
2657 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2658 if range_start.row() < start_row {
2659 return None;
2660 }
2661
2662 let line = &layout
2663 .position_map
2664 .line_layouts
2665 .get((range_start.row() - start_row) as usize)?
2666 .line;
2667 let range_start_x = line.x_for_index(range_start.column() as usize);
2668 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2669 Some(RectF::new(
2670 content_origin
2671 + vec2f(
2672 range_start_x,
2673 range_start_y + layout.position_map.line_height,
2674 )
2675 - vec2f(scroll_left, scroll_top),
2676 vec2f(
2677 layout.position_map.em_width,
2678 layout.position_map.line_height,
2679 ),
2680 ))
2681 }
2682
2683 fn debug(
2684 &self,
2685 bounds: RectF,
2686 _: &Self::LayoutState,
2687 _: &Self::PaintState,
2688 _: &Editor,
2689 _: &ViewContext<Editor>,
2690 ) -> json::Value {
2691 json!({
2692 "type": "BufferElement",
2693 "bounds": bounds.to_json()
2694 })
2695 }
2696}
2697
2698type BufferRow = u32;
2699
2700pub struct LayoutState {
2701 position_map: Arc<PositionMap>,
2702 gutter_size: Vector2F,
2703 gutter_padding: f32,
2704 gutter_margin: f32,
2705 text_size: Vector2F,
2706 mode: EditorMode,
2707 wrap_guides: SmallVec<[(f32, bool); 2]>,
2708 visible_display_row_range: Range<u32>,
2709 active_rows: BTreeMap<u32, bool>,
2710 highlighted_rows: Option<Range<u32>>,
2711 line_number_layouts: Vec<Option<text_layout::Line>>,
2712 display_hunks: Vec<DisplayDiffHunk>,
2713 blocks: Vec<BlockLayout>,
2714 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2715 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2716 selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)>,
2717 scrollbar_row_range: Range<f32>,
2718 show_scrollbars: bool,
2719 is_singleton: bool,
2720 max_row: u32,
2721 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2722 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2723 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2724 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2725 tab_invisible: Line,
2726 space_invisible: Line,
2727}
2728
2729struct PositionMap {
2730 size: Vector2F,
2731 line_height: f32,
2732 scroll_max: Vector2F,
2733 em_width: f32,
2734 em_advance: f32,
2735 line_layouts: Vec<LineWithInvisibles>,
2736 snapshot: EditorSnapshot,
2737}
2738
2739#[derive(Debug, Copy, Clone)]
2740pub struct PointForPosition {
2741 pub previous_valid: DisplayPoint,
2742 pub next_valid: DisplayPoint,
2743 pub exact_unclipped: DisplayPoint,
2744 pub column_overshoot_after_line_end: u32,
2745}
2746
2747impl PointForPosition {
2748 #[cfg(test)]
2749 pub fn valid(valid: DisplayPoint) -> Self {
2750 Self {
2751 previous_valid: valid,
2752 next_valid: valid,
2753 exact_unclipped: valid,
2754 column_overshoot_after_line_end: 0,
2755 }
2756 }
2757
2758 pub fn as_valid(&self) -> Option<DisplayPoint> {
2759 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2760 Some(self.previous_valid)
2761 } else {
2762 None
2763 }
2764 }
2765}
2766
2767impl PositionMap {
2768 fn point_for_position(&self, text_bounds: RectF, position: Vector2F) -> PointForPosition {
2769 let scroll_position = self.snapshot.scroll_position();
2770 let position = position - text_bounds.origin();
2771 let y = position.y().max(0.0).min(self.size.y());
2772 let x = position.x() + (scroll_position.x() * self.em_width);
2773 let row = (y / self.line_height + scroll_position.y()) as u32;
2774 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2775 .line_layouts
2776 .get(row as usize - scroll_position.y() as usize)
2777 .map(|line_with_spaces| &line_with_spaces.line)
2778 {
2779 if let Some(ix) = line.index_for_x(x) {
2780 (ix as u32, 0.0)
2781 } else {
2782 (line.len() as u32, 0f32.max(x - line.width()))
2783 }
2784 } else {
2785 (0, x)
2786 };
2787
2788 let mut exact_unclipped = DisplayPoint::new(row, column);
2789 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2790 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2791
2792 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2793 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2794 PointForPosition {
2795 previous_valid,
2796 next_valid,
2797 exact_unclipped,
2798 column_overshoot_after_line_end,
2799 }
2800 }
2801}
2802
2803struct BlockLayout {
2804 row: u32,
2805 element: AnyElement<Editor>,
2806 style: BlockStyle,
2807}
2808
2809fn layout_line(
2810 row: u32,
2811 snapshot: &EditorSnapshot,
2812 style: &EditorStyle,
2813 layout_cache: &TextLayoutCache,
2814) -> text_layout::Line {
2815 let mut line = snapshot.line(row);
2816
2817 if line.len() > MAX_LINE_LEN {
2818 let mut len = MAX_LINE_LEN;
2819 while !line.is_char_boundary(len) {
2820 len -= 1;
2821 }
2822
2823 line.truncate(len);
2824 }
2825
2826 layout_cache.layout_str(
2827 &line,
2828 style.text.font_size,
2829 &[(
2830 snapshot.line_len(row) as usize,
2831 RunStyle {
2832 font_id: style.text.font_id,
2833 color: Color::black(),
2834 underline: Default::default(),
2835 },
2836 )],
2837 )
2838}
2839
2840#[derive(Debug)]
2841pub struct Cursor {
2842 origin: Vector2F,
2843 block_width: f32,
2844 line_height: f32,
2845 color: Color,
2846 shape: CursorShape,
2847 block_text: Option<Line>,
2848}
2849
2850impl Cursor {
2851 pub fn new(
2852 origin: Vector2F,
2853 block_width: f32,
2854 line_height: f32,
2855 color: Color,
2856 shape: CursorShape,
2857 block_text: Option<Line>,
2858 ) -> Cursor {
2859 Cursor {
2860 origin,
2861 block_width,
2862 line_height,
2863 color,
2864 shape,
2865 block_text,
2866 }
2867 }
2868
2869 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2870 RectF::new(
2871 self.origin + origin,
2872 vec2f(self.block_width, self.line_height),
2873 )
2874 }
2875
2876 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2877 let bounds = match self.shape {
2878 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2879 CursorShape::Block | CursorShape::Hollow => RectF::new(
2880 self.origin + origin,
2881 vec2f(self.block_width, self.line_height),
2882 ),
2883 CursorShape::Underscore => RectF::new(
2884 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2885 vec2f(self.block_width, 2.0),
2886 ),
2887 };
2888
2889 //Draw background or border quad
2890 if matches!(self.shape, CursorShape::Hollow) {
2891 scene.push_quad(Quad {
2892 bounds,
2893 background: None,
2894 border: Border::all(1., self.color),
2895 corner_radii: Default::default(),
2896 });
2897 } else {
2898 scene.push_quad(Quad {
2899 bounds,
2900 background: Some(self.color),
2901 border: Default::default(),
2902 corner_radii: Default::default(),
2903 });
2904 }
2905
2906 if let Some(block_text) = &self.block_text {
2907 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2908 }
2909 }
2910
2911 pub fn shape(&self) -> CursorShape {
2912 self.shape
2913 }
2914}
2915
2916#[derive(Debug)]
2917pub struct HighlightedRange {
2918 pub start_y: f32,
2919 pub line_height: f32,
2920 pub lines: Vec<HighlightedRangeLine>,
2921 pub color: Color,
2922 pub corner_radius: f32,
2923}
2924
2925#[derive(Debug)]
2926pub struct HighlightedRangeLine {
2927 pub start_x: f32,
2928 pub end_x: f32,
2929}
2930
2931impl HighlightedRange {
2932 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2933 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2934 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2935 self.paint_lines(
2936 self.start_y + self.line_height,
2937 &self.lines[1..],
2938 bounds,
2939 scene,
2940 );
2941 } else {
2942 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2943 }
2944 }
2945
2946 fn paint_lines(
2947 &self,
2948 start_y: f32,
2949 lines: &[HighlightedRangeLine],
2950 bounds: RectF,
2951 scene: &mut SceneBuilder,
2952 ) {
2953 if lines.is_empty() {
2954 return;
2955 }
2956
2957 let mut path = PathBuilder::new();
2958 let first_line = lines.first().unwrap();
2959 let last_line = lines.last().unwrap();
2960
2961 let first_top_left = vec2f(first_line.start_x, start_y);
2962 let first_top_right = vec2f(first_line.end_x, start_y);
2963
2964 let curve_height = vec2f(0., self.corner_radius);
2965 let curve_width = |start_x: f32, end_x: f32| {
2966 let max = (end_x - start_x) / 2.;
2967 let width = if max < self.corner_radius {
2968 max
2969 } else {
2970 self.corner_radius
2971 };
2972
2973 vec2f(width, 0.)
2974 };
2975
2976 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2977 path.reset(first_top_right - top_curve_width);
2978 path.curve_to(first_top_right + curve_height, first_top_right);
2979
2980 let mut iter = lines.iter().enumerate().peekable();
2981 while let Some((ix, line)) = iter.next() {
2982 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2983
2984 if let Some((_, next_line)) = iter.peek() {
2985 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2986
2987 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2988 Ordering::Equal => {
2989 path.line_to(bottom_right);
2990 }
2991 Ordering::Less => {
2992 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2993 path.line_to(bottom_right - curve_height);
2994 if self.corner_radius > 0. {
2995 path.curve_to(bottom_right - curve_width, bottom_right);
2996 }
2997 path.line_to(next_top_right + curve_width);
2998 if self.corner_radius > 0. {
2999 path.curve_to(next_top_right + curve_height, next_top_right);
3000 }
3001 }
3002 Ordering::Greater => {
3003 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
3004 path.line_to(bottom_right - curve_height);
3005 if self.corner_radius > 0. {
3006 path.curve_to(bottom_right + curve_width, bottom_right);
3007 }
3008 path.line_to(next_top_right - curve_width);
3009 if self.corner_radius > 0. {
3010 path.curve_to(next_top_right + curve_height, next_top_right);
3011 }
3012 }
3013 }
3014 } else {
3015 let curve_width = curve_width(line.start_x, line.end_x);
3016 path.line_to(bottom_right - curve_height);
3017 if self.corner_radius > 0. {
3018 path.curve_to(bottom_right - curve_width, bottom_right);
3019 }
3020
3021 let bottom_left = vec2f(line.start_x, bottom_right.y());
3022 path.line_to(bottom_left + curve_width);
3023 if self.corner_radius > 0. {
3024 path.curve_to(bottom_left - curve_height, bottom_left);
3025 }
3026 }
3027 }
3028
3029 if first_line.start_x > last_line.start_x {
3030 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3031 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
3032 path.line_to(second_top_left + curve_height);
3033 if self.corner_radius > 0. {
3034 path.curve_to(second_top_left + curve_width, second_top_left);
3035 }
3036 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
3037 path.line_to(first_bottom_left - curve_width);
3038 if self.corner_radius > 0. {
3039 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3040 }
3041 }
3042
3043 path.line_to(first_top_left + curve_height);
3044 if self.corner_radius > 0. {
3045 path.curve_to(first_top_left + top_curve_width, first_top_left);
3046 }
3047 path.line_to(first_top_right - top_curve_width);
3048
3049 scene.push_path(path.build(self.color, Some(bounds)));
3050 }
3051}
3052
3053fn range_to_bounds(
3054 range: &Range<DisplayPoint>,
3055 content_origin: Vector2F,
3056 scroll_left: f32,
3057 scroll_top: f32,
3058 visible_row_range: &Range<u32>,
3059 line_end_overshoot: f32,
3060 position_map: &PositionMap,
3061) -> impl Iterator<Item = RectF> {
3062 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
3063
3064 if range.start == range.end {
3065 return bounds.into_iter();
3066 }
3067
3068 let start_row = visible_row_range.start;
3069 let end_row = visible_row_range.end;
3070
3071 let row_range = if range.end.column() == 0 {
3072 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
3073 } else {
3074 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
3075 };
3076
3077 let first_y =
3078 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
3079
3080 for (idx, row) in row_range.enumerate() {
3081 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
3082
3083 let start_x = if row == range.start.row() {
3084 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
3085 - scroll_left
3086 } else {
3087 content_origin.x() - scroll_left
3088 };
3089
3090 let end_x = if row == range.end.row() {
3091 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
3092 } else {
3093 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
3094 };
3095
3096 bounds.push(RectF::from_points(
3097 vec2f(start_x, first_y + position_map.line_height * idx as f32),
3098 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
3099 ))
3100 }
3101
3102 bounds.into_iter()
3103}
3104
3105pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
3106 delta.powf(1.5) / 100.0
3107}
3108
3109fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3110 delta.powf(1.2) / 300.0
3111}
3112
3113#[cfg(test)]
3114mod tests {
3115 use super::*;
3116 use crate::{
3117 display_map::{BlockDisposition, BlockProperties},
3118 editor_tests::{init_test, update_test_language_settings},
3119 Editor, MultiBuffer,
3120 };
3121 use gpui::TestAppContext;
3122 use language::language_settings;
3123 use log::info;
3124 use std::{num::NonZeroU32, sync::Arc};
3125 use util::test::sample_text;
3126
3127 #[gpui::test]
3128 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3129 init_test(cx, |_| {});
3130 let editor = cx
3131 .add_window(|cx| {
3132 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3133 Editor::new(EditorMode::Full, buffer, None, None, cx)
3134 })
3135 .root(cx);
3136 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3137
3138 let layouts = editor.update(cx, |editor, cx| {
3139 let snapshot = editor.snapshot(cx);
3140 element
3141 .layout_line_numbers(
3142 0..6,
3143 &Default::default(),
3144 DisplayPoint::new(0, 0),
3145 false,
3146 &snapshot,
3147 cx,
3148 )
3149 .0
3150 });
3151 assert_eq!(layouts.len(), 6);
3152
3153 let relative_rows = editor.update(cx, |editor, cx| {
3154 let snapshot = editor.snapshot(cx);
3155 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3156 });
3157 assert_eq!(relative_rows[&0], 3);
3158 assert_eq!(relative_rows[&1], 2);
3159 assert_eq!(relative_rows[&2], 1);
3160 // current line has no relative number
3161 assert_eq!(relative_rows[&4], 1);
3162 assert_eq!(relative_rows[&5], 2);
3163
3164 // works if cursor is before screen
3165 let relative_rows = editor.update(cx, |editor, cx| {
3166 let snapshot = editor.snapshot(cx);
3167
3168 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3169 });
3170 assert_eq!(relative_rows.len(), 3);
3171 assert_eq!(relative_rows[&3], 2);
3172 assert_eq!(relative_rows[&4], 3);
3173 assert_eq!(relative_rows[&5], 4);
3174
3175 // works if cursor is after screen
3176 let relative_rows = editor.update(cx, |editor, cx| {
3177 let snapshot = editor.snapshot(cx);
3178
3179 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3180 });
3181 assert_eq!(relative_rows.len(), 3);
3182 assert_eq!(relative_rows[&0], 5);
3183 assert_eq!(relative_rows[&1], 4);
3184 assert_eq!(relative_rows[&2], 3);
3185 }
3186
3187 #[gpui::test]
3188 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3189 init_test(cx, |_| {});
3190
3191 let editor = cx
3192 .add_window(|cx| {
3193 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3194 Editor::new(EditorMode::Full, buffer, None, None, cx)
3195 })
3196 .root(cx);
3197 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3198 let (_, state) = editor.update(cx, |editor, cx| {
3199 editor.cursor_shape = CursorShape::Block;
3200 editor.change_selections(None, cx, |s| {
3201 s.select_ranges([
3202 Point::new(0, 0)..Point::new(1, 0),
3203 Point::new(3, 2)..Point::new(3, 3),
3204 Point::new(5, 6)..Point::new(6, 0),
3205 ]);
3206 });
3207 let mut new_parents = Default::default();
3208 let mut notify_views_if_parents_change = Default::default();
3209 let mut layout_cx = LayoutContext::new(
3210 cx,
3211 &mut new_parents,
3212 &mut notify_views_if_parents_change,
3213 false,
3214 );
3215 element.layout(
3216 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3217 editor,
3218 &mut layout_cx,
3219 )
3220 });
3221 assert_eq!(state.selections.len(), 1);
3222 let local_selections = &state.selections[0].1;
3223 assert_eq!(local_selections.len(), 3);
3224 // moves cursor back one line
3225 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3226 assert_eq!(
3227 local_selections[0].range,
3228 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3229 );
3230
3231 // moves cursor back one column
3232 assert_eq!(
3233 local_selections[1].range,
3234 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3235 );
3236 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3237
3238 // leaves cursor on the max point
3239 assert_eq!(
3240 local_selections[2].range,
3241 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3242 );
3243 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3244
3245 // active lines does not include 1 (even though the range of the selection does)
3246 assert_eq!(
3247 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3248 vec![0, 3, 5, 6]
3249 );
3250
3251 // multi-buffer support
3252 // in DisplayPoint co-ordinates, this is what we're dealing with:
3253 // 0: [[file
3254 // 1: header]]
3255 // 2: aaaaaa
3256 // 3: bbbbbb
3257 // 4: cccccc
3258 // 5:
3259 // 6: ...
3260 // 7: ffffff
3261 // 8: gggggg
3262 // 9: hhhhhh
3263 // 10:
3264 // 11: [[file
3265 // 12: header]]
3266 // 13: bbbbbb
3267 // 14: cccccc
3268 // 15: dddddd
3269 let editor = cx
3270 .add_window(|cx| {
3271 let buffer = MultiBuffer::build_multi(
3272 [
3273 (
3274 &(sample_text(8, 6, 'a') + "\n"),
3275 vec![
3276 Point::new(0, 0)..Point::new(3, 0),
3277 Point::new(4, 0)..Point::new(7, 0),
3278 ],
3279 ),
3280 (
3281 &(sample_text(8, 6, 'a') + "\n"),
3282 vec![Point::new(1, 0)..Point::new(3, 0)],
3283 ),
3284 ],
3285 cx,
3286 );
3287 Editor::new(EditorMode::Full, buffer, None, None, cx)
3288 })
3289 .root(cx);
3290 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3291 let (_, state) = editor.update(cx, |editor, cx| {
3292 editor.cursor_shape = CursorShape::Block;
3293 editor.change_selections(None, cx, |s| {
3294 s.select_display_ranges([
3295 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3296 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3297 ]);
3298 });
3299 let mut new_parents = Default::default();
3300 let mut notify_views_if_parents_change = Default::default();
3301 let mut layout_cx = LayoutContext::new(
3302 cx,
3303 &mut new_parents,
3304 &mut notify_views_if_parents_change,
3305 false,
3306 );
3307 element.layout(
3308 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3309 editor,
3310 &mut layout_cx,
3311 )
3312 });
3313
3314 assert_eq!(state.selections.len(), 1);
3315 let local_selections = &state.selections[0].1;
3316 assert_eq!(local_selections.len(), 2);
3317
3318 // moves cursor on excerpt boundary back a line
3319 // and doesn't allow selection to bleed through
3320 assert_eq!(
3321 local_selections[0].range,
3322 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3323 );
3324 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3325
3326 // moves cursor on buffer boundary back two lines
3327 // and doesn't allow selection to bleed through
3328 assert_eq!(
3329 local_selections[1].range,
3330 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3331 );
3332 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3333 }
3334
3335 #[gpui::test]
3336 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3337 init_test(cx, |_| {});
3338
3339 let editor = cx
3340 .add_window(|cx| {
3341 let buffer = MultiBuffer::build_simple("", cx);
3342 Editor::new(EditorMode::Full, buffer, None, None, cx)
3343 })
3344 .root(cx);
3345
3346 editor.update(cx, |editor, cx| {
3347 editor.set_placeholder_text("hello", cx);
3348 editor.insert_blocks(
3349 [BlockProperties {
3350 style: BlockStyle::Fixed,
3351 disposition: BlockDisposition::Above,
3352 height: 3,
3353 position: Anchor::min(),
3354 render: Arc::new(|_| Empty::new().into_any()),
3355 }],
3356 None,
3357 cx,
3358 );
3359
3360 // Blur the editor so that it displays placeholder text.
3361 cx.blur();
3362 });
3363
3364 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3365 let (size, mut state) = editor.update(cx, |editor, cx| {
3366 let mut new_parents = Default::default();
3367 let mut notify_views_if_parents_change = Default::default();
3368 let mut layout_cx = LayoutContext::new(
3369 cx,
3370 &mut new_parents,
3371 &mut notify_views_if_parents_change,
3372 false,
3373 );
3374 element.layout(
3375 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3376 editor,
3377 &mut layout_cx,
3378 )
3379 });
3380
3381 assert_eq!(state.position_map.line_layouts.len(), 4);
3382 assert_eq!(
3383 state
3384 .line_number_layouts
3385 .iter()
3386 .map(Option::is_some)
3387 .collect::<Vec<_>>(),
3388 &[false, false, false, true]
3389 );
3390
3391 // Don't panic.
3392 let mut scene = SceneBuilder::new(1.0);
3393 let bounds = RectF::new(Default::default(), size);
3394 editor.update(cx, |editor, cx| {
3395 element.paint(
3396 &mut scene,
3397 bounds,
3398 bounds,
3399 &mut state,
3400 editor,
3401 &mut PaintContext::new(cx),
3402 );
3403 });
3404 }
3405
3406 #[gpui::test]
3407 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3408 const TAB_SIZE: u32 = 4;
3409
3410 let input_text = "\t \t|\t| a b";
3411 let expected_invisibles = vec![
3412 Invisible::Tab {
3413 line_start_offset: 0,
3414 },
3415 Invisible::Whitespace {
3416 line_offset: TAB_SIZE as usize,
3417 },
3418 Invisible::Tab {
3419 line_start_offset: TAB_SIZE as usize + 1,
3420 },
3421 Invisible::Tab {
3422 line_start_offset: TAB_SIZE as usize * 2 + 1,
3423 },
3424 Invisible::Whitespace {
3425 line_offset: TAB_SIZE as usize * 3 + 1,
3426 },
3427 Invisible::Whitespace {
3428 line_offset: TAB_SIZE as usize * 3 + 3,
3429 },
3430 ];
3431 assert_eq!(
3432 expected_invisibles.len(),
3433 input_text
3434 .chars()
3435 .filter(|initial_char| initial_char.is_whitespace())
3436 .count(),
3437 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3438 );
3439
3440 init_test(cx, |s| {
3441 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3442 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3443 });
3444
3445 let actual_invisibles =
3446 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3447
3448 assert_eq!(expected_invisibles, actual_invisibles);
3449 }
3450
3451 #[gpui::test]
3452 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3453 init_test(cx, |s| {
3454 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3455 s.defaults.tab_size = NonZeroU32::new(4);
3456 });
3457
3458 for editor_mode_without_invisibles in [
3459 EditorMode::SingleLine,
3460 EditorMode::AutoHeight { max_lines: 100 },
3461 ] {
3462 let invisibles = collect_invisibles_from_new_editor(
3463 cx,
3464 editor_mode_without_invisibles,
3465 "\t\t\t| | a b",
3466 500.0,
3467 );
3468 assert!(invisibles.is_empty(),
3469 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3470 }
3471 }
3472
3473 #[gpui::test]
3474 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3475 let tab_size = 4;
3476 let input_text = "a\tbcd ".repeat(9);
3477 let repeated_invisibles = [
3478 Invisible::Tab {
3479 line_start_offset: 1,
3480 },
3481 Invisible::Whitespace {
3482 line_offset: tab_size as usize + 3,
3483 },
3484 Invisible::Whitespace {
3485 line_offset: tab_size as usize + 4,
3486 },
3487 Invisible::Whitespace {
3488 line_offset: tab_size as usize + 5,
3489 },
3490 ];
3491 let expected_invisibles = std::iter::once(repeated_invisibles)
3492 .cycle()
3493 .take(9)
3494 .flatten()
3495 .collect::<Vec<_>>();
3496 assert_eq!(
3497 expected_invisibles.len(),
3498 input_text
3499 .chars()
3500 .filter(|initial_char| initial_char.is_whitespace())
3501 .count(),
3502 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3503 );
3504 info!("Expected invisibles: {expected_invisibles:?}");
3505
3506 init_test(cx, |_| {});
3507
3508 // Put the same string with repeating whitespace pattern into editors of various size,
3509 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3510 let resize_step = 10.0;
3511 let mut editor_width = 200.0;
3512 while editor_width <= 1000.0 {
3513 update_test_language_settings(cx, |s| {
3514 s.defaults.tab_size = NonZeroU32::new(tab_size);
3515 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3516 s.defaults.preferred_line_length = Some(editor_width as u32);
3517 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3518 });
3519
3520 let actual_invisibles =
3521 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3522
3523 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3524 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3525 let mut i = 0;
3526 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3527 i = actual_index;
3528 match expected_invisibles.get(i) {
3529 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3530 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3531 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3532 _ => {
3533 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3534 }
3535 },
3536 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3537 }
3538 }
3539 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3540 assert!(
3541 missing_expected_invisibles.is_empty(),
3542 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3543 );
3544
3545 editor_width += resize_step;
3546 }
3547 }
3548
3549 fn collect_invisibles_from_new_editor(
3550 cx: &mut TestAppContext,
3551 editor_mode: EditorMode,
3552 input_text: &str,
3553 editor_width: f32,
3554 ) -> Vec<Invisible> {
3555 info!(
3556 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3557 );
3558 let editor = cx
3559 .add_window(|cx| {
3560 let buffer = MultiBuffer::build_simple(&input_text, cx);
3561 Editor::new(editor_mode, buffer, None, None, cx)
3562 })
3563 .root(cx);
3564
3565 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3566 let (_, layout_state) = editor.update(cx, |editor, cx| {
3567 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3568 editor.set_wrap_width(Some(editor_width), cx);
3569
3570 let mut new_parents = Default::default();
3571 let mut notify_views_if_parents_change = Default::default();
3572 let mut layout_cx = LayoutContext::new(
3573 cx,
3574 &mut new_parents,
3575 &mut notify_views_if_parents_change,
3576 false,
3577 );
3578 element.layout(
3579 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3580 editor,
3581 &mut layout_cx,
3582 )
3583 });
3584
3585 layout_state
3586 .position_map
3587 .line_layouts
3588 .iter()
3589 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3590 .flatten()
3591 .cloned()
3592 .collect()
3593 }
3594}