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