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