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