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