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