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