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 cursor_row -= 1;
864 cursor_column =
865 layout.position_map.snapshot.line_len(cursor_row) as usize;
866 }
867 }
868
869 if layout.visible_display_row_range.contains(&cursor_row) {
870 let cursor_row_layout = &layout.position_map.line_layouts
871 [(cursor_row - start_row) as usize]
872 .line;
873
874 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
875 let mut block_width =
876 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
877 if block_width == 0.0 {
878 block_width = layout.position_map.em_width;
879 }
880 let block_text = if let CursorShape::Block = selection.cursor_shape {
881 layout
882 .position_map
883 .snapshot
884 .chars_at(DisplayPoint::new(
885 cursor_row as u32,
886 cursor_column as u32,
887 ))
888 .next()
889 .and_then(|(character, _)| {
890 let font_id =
891 cursor_row_layout.font_for_index(cursor_column)?;
892 let text = character.to_string();
893
894 Some(cx.text_layout_cache().layout_str(
895 &text,
896 cursor_row_layout.font_size(),
897 &[(
898 text.len(),
899 RunStyle {
900 font_id,
901 color: style.background,
902 underline: Default::default(),
903 },
904 )],
905 ))
906 })
907 } else {
908 None
909 };
910
911 let x = cursor_character_x - scroll_left;
912 let y = cursor_row as f32 * layout.position_map.line_height - scroll_top;
913 if selection.is_newest {
914 editor.pixel_position_of_newest_cursor = Some(vec2f(
915 bounds.origin_x() + x + block_width / 2.,
916 bounds.origin_y() + y + layout.position_map.line_height / 2.,
917 ));
918 }
919 cursors.push(Cursor {
920 color: selection_style.cursor,
921 block_width,
922 origin: vec2f(x, y),
923 line_height: layout.position_map.line_height,
924 shape: selection.cursor_shape,
925 block_text,
926 });
927 }
928 }
929 }
930 }
931
932 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
933 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
934 let row = start_row + ix as u32;
935 line_with_invisibles.draw(
936 layout,
937 row,
938 scroll_top,
939 scene,
940 content_origin,
941 scroll_left,
942 visible_text_bounds,
943 whitespace_setting,
944 &invisible_display_ranges,
945 visible_bounds,
946 cx,
947 )
948 }
949 }
950
951 scene.paint_layer(Some(bounds), |scene| {
952 for cursor in cursors {
953 cursor.paint(scene, content_origin, cx);
954 }
955 });
956
957 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
958 scene.push_stacking_context(None, None);
959 let cursor_row_layout =
960 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
961 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
962 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
963 let mut list_origin = content_origin + vec2f(x, y);
964 let list_width = context_menu.size().x();
965 let list_height = context_menu.size().y();
966
967 // Snap the right edge of the list to the right edge of the window if
968 // its horizontal bounds overflow.
969 if list_origin.x() + list_width > cx.window_size().x() {
970 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
971 }
972
973 if list_origin.y() + list_height > bounds.max_y() {
974 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
975 }
976
977 context_menu.paint(
978 scene,
979 list_origin,
980 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
981 editor,
982 cx,
983 );
984
985 scene.pop_stacking_context();
986 }
987
988 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
989 scene.push_stacking_context(None, None);
990
991 // This is safe because we check on layout whether the required row is available
992 let hovered_row_layout =
993 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
994
995 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
996 // height. This is the size we will use to decide whether to render popovers above or below
997 // the hovered line.
998 let first_size = hover_popovers[0].size();
999 let height_to_reserve = first_size.y()
1000 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1001
1002 // Compute Hovered Point
1003 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1004 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1005 let hovered_point = content_origin + vec2f(x, y);
1006
1007 if hovered_point.y() - height_to_reserve > 0.0 {
1008 // There is enough space above. Render popovers above the hovered point
1009 let mut current_y = hovered_point.y();
1010 for hover_popover in hover_popovers {
1011 let size = hover_popover.size();
1012 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1013
1014 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1015 if x_out_of_bounds < 0.0 {
1016 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1017 }
1018
1019 hover_popover.paint(
1020 scene,
1021 popover_origin,
1022 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1023 editor,
1024 cx,
1025 );
1026
1027 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1028 }
1029 } else {
1030 // There is not enough space above. Render popovers below the hovered point
1031 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1032 for hover_popover in hover_popovers {
1033 let size = hover_popover.size();
1034 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1035
1036 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1037 if x_out_of_bounds < 0.0 {
1038 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1039 }
1040
1041 hover_popover.paint(
1042 scene,
1043 popover_origin,
1044 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1045 editor,
1046 cx,
1047 );
1048
1049 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1050 }
1051 }
1052
1053 scene.pop_stacking_context();
1054 }
1055
1056 scene.pop_layer();
1057 }
1058
1059 fn paint_scrollbar(
1060 &mut self,
1061 scene: &mut SceneBuilder,
1062 bounds: RectF,
1063 layout: &mut LayoutState,
1064 cx: &mut ViewContext<Editor>,
1065 editor: &Editor,
1066 ) {
1067 enum ScrollbarMouseHandlers {}
1068 if layout.mode != EditorMode::Full {
1069 return;
1070 }
1071
1072 let style = &self.style.theme.scrollbar;
1073
1074 let top = bounds.min_y();
1075 let bottom = bounds.max_y();
1076 let right = bounds.max_x();
1077 let left = right - style.width;
1078 let row_range = &layout.scrollbar_row_range;
1079 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1080
1081 let mut height = bounds.height();
1082 let mut first_row_y_offset = 0.0;
1083
1084 // Impose a minimum height on the scrollbar thumb
1085 let row_height = height / max_row;
1086 let min_thumb_height =
1087 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1088 let thumb_height = (row_range.end - row_range.start) * row_height;
1089 if thumb_height < min_thumb_height {
1090 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1091 height -= min_thumb_height - thumb_height;
1092 }
1093
1094 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1095
1096 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1097 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1098 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1099 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1100
1101 if layout.show_scrollbars {
1102 scene.push_quad(Quad {
1103 bounds: track_bounds,
1104 border: style.track.border,
1105 background: style.track.background_color,
1106 ..Default::default()
1107 });
1108 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1109 let theme = theme::current(cx);
1110 let scrollbar_theme = &theme.editor.scrollbar;
1111 if layout.is_singleton && scrollbar_settings.selections {
1112 let start_anchor = Anchor::min();
1113 let end_anchor = Anchor::max();
1114 let mut start_row = None;
1115 let mut end_row = None;
1116 let color = scrollbar_theme.selections;
1117 let border = Border {
1118 width: 1.,
1119 color: style.thumb.border.color,
1120 overlay: false,
1121 top: false,
1122 right: true,
1123 bottom: false,
1124 left: true,
1125 };
1126 let mut push_region = |start, end| {
1127 if let (Some(start_display), Some(end_display)) = (start, end) {
1128 let start_y = y_for_row(start_display as f32);
1129 let mut end_y = y_for_row(end_display as f32);
1130 if end_y - start_y < 1. {
1131 end_y = start_y + 1.;
1132 }
1133 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1134
1135 scene.push_quad(Quad {
1136 bounds,
1137 background: Some(color),
1138 border,
1139 corner_radius: style.thumb.corner_radius,
1140 })
1141 }
1142 };
1143 for (row, _) in &editor
1144 .background_highlights_in_range_for::<crate::items::BufferSearchHighlights>(
1145 start_anchor..end_anchor,
1146 &layout.position_map.snapshot,
1147 &theme,
1148 )
1149 {
1150 let start_display = row.start;
1151 let end_display = row.end;
1152
1153 if start_row.is_none() {
1154 assert_eq!(end_row, None);
1155 start_row = Some(start_display.row());
1156 end_row = Some(end_display.row());
1157 continue;
1158 }
1159 if let Some(current_end) = end_row.as_mut() {
1160 if start_display.row() > *current_end + 1 {
1161 push_region(start_row, end_row);
1162 start_row = Some(start_display.row());
1163 end_row = Some(end_display.row());
1164 } else {
1165 // Merge two hunks.
1166 *current_end = end_display.row();
1167 }
1168 } else {
1169 unreachable!();
1170 }
1171 }
1172 // We might still have a hunk that was not rendered (if there was a search hit on the last line)
1173 push_region(start_row, end_row);
1174 }
1175
1176 if layout.is_singleton && scrollbar_settings.git_diff {
1177 let diff_style = scrollbar_theme.git.clone();
1178 for hunk in layout
1179 .position_map
1180 .snapshot
1181 .buffer_snapshot
1182 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1183 {
1184 let start_display = Point::new(hunk.buffer_range.start, 0)
1185 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1186 let end_display = Point::new(hunk.buffer_range.end, 0)
1187 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1188 let start_y = y_for_row(start_display.row() as f32);
1189 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1190 y_for_row((end_display.row() + 1) as f32)
1191 } else {
1192 y_for_row((end_display.row()) as f32)
1193 };
1194
1195 if end_y - start_y < 1. {
1196 end_y = start_y + 1.;
1197 }
1198 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1199
1200 let color = match hunk.status() {
1201 DiffHunkStatus::Added => diff_style.inserted,
1202 DiffHunkStatus::Modified => diff_style.modified,
1203 DiffHunkStatus::Removed => diff_style.deleted,
1204 };
1205
1206 let border = Border {
1207 width: 1.,
1208 color: style.thumb.border.color,
1209 overlay: false,
1210 top: false,
1211 right: true,
1212 bottom: false,
1213 left: true,
1214 };
1215
1216 scene.push_quad(Quad {
1217 bounds,
1218 background: Some(color),
1219 border,
1220 corner_radius: style.thumb.corner_radius,
1221 })
1222 }
1223 }
1224
1225 scene.push_quad(Quad {
1226 bounds: thumb_bounds,
1227 border: style.thumb.border,
1228 background: style.thumb.background_color,
1229 corner_radius: style.thumb.corner_radius,
1230 });
1231 }
1232
1233 scene.push_cursor_region(CursorRegion {
1234 bounds: track_bounds,
1235 style: CursorStyle::Arrow,
1236 });
1237 scene.push_mouse_region(
1238 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1239 .on_move(move |event, editor: &mut Editor, cx| {
1240 if event.pressed_button.is_none() {
1241 editor.scroll_manager.show_scrollbar(cx);
1242 }
1243 })
1244 .on_down(MouseButton::Left, {
1245 let row_range = row_range.clone();
1246 move |event, editor: &mut Editor, cx| {
1247 let y = event.position.y();
1248 if y < thumb_top || thumb_bottom < y {
1249 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1250 let top_row = center_row
1251 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1252 let mut position = editor.scroll_position(cx);
1253 position.set_y(top_row as f32);
1254 editor.set_scroll_position(position, cx);
1255 } else {
1256 editor.scroll_manager.show_scrollbar(cx);
1257 }
1258 }
1259 })
1260 .on_drag(MouseButton::Left, {
1261 move |event, editor: &mut Editor, cx| {
1262 if event.end {
1263 return;
1264 }
1265
1266 let y = event.prev_mouse_position.y();
1267 let new_y = event.position.y();
1268 if thumb_top < y && y < thumb_bottom {
1269 let mut position = editor.scroll_position(cx);
1270 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1271 if position.y() < 0.0 {
1272 position.set_y(0.);
1273 }
1274 editor.set_scroll_position(position, cx);
1275 }
1276 }
1277 }),
1278 );
1279 }
1280
1281 #[allow(clippy::too_many_arguments)]
1282 fn paint_highlighted_range(
1283 &self,
1284 scene: &mut SceneBuilder,
1285 range: Range<DisplayPoint>,
1286 color: Color,
1287 corner_radius: f32,
1288 line_end_overshoot: f32,
1289 layout: &LayoutState,
1290 content_origin: Vector2F,
1291 scroll_top: f32,
1292 scroll_left: f32,
1293 bounds: RectF,
1294 ) {
1295 let start_row = layout.visible_display_row_range.start;
1296 let end_row = layout.visible_display_row_range.end;
1297 if range.start != range.end {
1298 let row_range = if range.end.column() == 0 {
1299 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1300 } else {
1301 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1302 };
1303
1304 let highlighted_range = HighlightedRange {
1305 color,
1306 line_height: layout.position_map.line_height,
1307 corner_radius,
1308 start_y: content_origin.y()
1309 + row_range.start as f32 * layout.position_map.line_height
1310 - scroll_top,
1311 lines: row_range
1312 .into_iter()
1313 .map(|row| {
1314 let line_layout =
1315 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1316 HighlightedRangeLine {
1317 start_x: if row == range.start.row() {
1318 content_origin.x()
1319 + line_layout.x_for_index(range.start.column() as usize)
1320 - scroll_left
1321 } else {
1322 content_origin.x() - scroll_left
1323 },
1324 end_x: if row == range.end.row() {
1325 content_origin.x()
1326 + line_layout.x_for_index(range.end.column() as usize)
1327 - scroll_left
1328 } else {
1329 content_origin.x() + line_layout.width() + line_end_overshoot
1330 - scroll_left
1331 },
1332 }
1333 })
1334 .collect(),
1335 };
1336
1337 highlighted_range.paint(bounds, scene);
1338 }
1339 }
1340
1341 fn paint_blocks(
1342 &mut self,
1343 scene: &mut SceneBuilder,
1344 bounds: RectF,
1345 visible_bounds: RectF,
1346 layout: &mut LayoutState,
1347 editor: &mut Editor,
1348 cx: &mut ViewContext<Editor>,
1349 ) {
1350 let scroll_position = layout.position_map.snapshot.scroll_position();
1351 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1352 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1353
1354 for block in &mut layout.blocks {
1355 let mut origin = bounds.origin()
1356 + vec2f(
1357 0.,
1358 block.row as f32 * layout.position_map.line_height - scroll_top,
1359 );
1360 if !matches!(block.style, BlockStyle::Sticky) {
1361 origin += vec2f(-scroll_left, 0.);
1362 }
1363 block
1364 .element
1365 .paint(scene, origin, visible_bounds, editor, cx);
1366 }
1367 }
1368
1369 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1370 let style = &self.style;
1371
1372 cx.text_layout_cache()
1373 .layout_str(
1374 " ".repeat(column).as_str(),
1375 style.text.font_size,
1376 &[(
1377 column,
1378 RunStyle {
1379 font_id: style.text.font_id,
1380 color: Color::black(),
1381 underline: Default::default(),
1382 },
1383 )],
1384 )
1385 .width()
1386 }
1387
1388 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1389 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1390 self.column_pixels(digit_count, cx)
1391 }
1392
1393 //Folds contained in a hunk are ignored apart from shrinking visual size
1394 //If a fold contains any hunks then that fold line is marked as modified
1395 fn layout_git_gutters(
1396 &self,
1397 display_rows: Range<u32>,
1398 snapshot: &EditorSnapshot,
1399 ) -> Vec<DisplayDiffHunk> {
1400 let buffer_snapshot = &snapshot.buffer_snapshot;
1401
1402 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1403 .to_point(snapshot)
1404 .row;
1405 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1406 .to_point(snapshot)
1407 .row;
1408
1409 buffer_snapshot
1410 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1411 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1412 .dedup()
1413 .collect()
1414 }
1415
1416 fn layout_line_numbers(
1417 &self,
1418 rows: Range<u32>,
1419 active_rows: &BTreeMap<u32, bool>,
1420 is_singleton: bool,
1421 snapshot: &EditorSnapshot,
1422 cx: &ViewContext<Editor>,
1423 ) -> (
1424 Vec<Option<text_layout::Line>>,
1425 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1426 ) {
1427 let style = &self.style;
1428 let include_line_numbers = snapshot.mode == EditorMode::Full;
1429 let mut line_number_layouts = Vec::with_capacity(rows.len());
1430 let mut fold_statuses = Vec::with_capacity(rows.len());
1431 let mut line_number = String::new();
1432 for (ix, row) in snapshot
1433 .buffer_rows(rows.start)
1434 .take((rows.end - rows.start) as usize)
1435 .enumerate()
1436 {
1437 let display_row = rows.start + ix as u32;
1438 let (active, color) = if active_rows.contains_key(&display_row) {
1439 (true, style.line_number_active)
1440 } else {
1441 (false, style.line_number)
1442 };
1443 if let Some(buffer_row) = row {
1444 if include_line_numbers {
1445 line_number.clear();
1446 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1447 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1448 &line_number,
1449 style.text.font_size,
1450 &[(
1451 line_number.len(),
1452 RunStyle {
1453 font_id: style.text.font_id,
1454 color,
1455 underline: Default::default(),
1456 },
1457 )],
1458 )));
1459 fold_statuses.push(
1460 is_singleton
1461 .then(|| {
1462 snapshot
1463 .fold_for_line(buffer_row)
1464 .map(|fold_status| (fold_status, buffer_row, active))
1465 })
1466 .flatten(),
1467 )
1468 }
1469 } else {
1470 fold_statuses.push(None);
1471 line_number_layouts.push(None);
1472 }
1473 }
1474
1475 (line_number_layouts, fold_statuses)
1476 }
1477
1478 fn layout_lines(
1479 &mut self,
1480 rows: Range<u32>,
1481 line_number_layouts: &[Option<Line>],
1482 snapshot: &EditorSnapshot,
1483 cx: &ViewContext<Editor>,
1484 ) -> Vec<LineWithInvisibles> {
1485 if rows.start >= rows.end {
1486 return Vec::new();
1487 }
1488
1489 // When the editor is empty and unfocused, then show the placeholder.
1490 if snapshot.is_empty() {
1491 let placeholder_style = self
1492 .style
1493 .placeholder_text
1494 .as_ref()
1495 .unwrap_or(&self.style.text);
1496 let placeholder_text = snapshot.placeholder_text();
1497 let placeholder_lines = placeholder_text
1498 .as_ref()
1499 .map_or("", AsRef::as_ref)
1500 .split('\n')
1501 .skip(rows.start as usize)
1502 .chain(iter::repeat(""))
1503 .take(rows.len());
1504 placeholder_lines
1505 .map(|line| {
1506 cx.text_layout_cache().layout_str(
1507 line,
1508 placeholder_style.font_size,
1509 &[(
1510 line.len(),
1511 RunStyle {
1512 font_id: placeholder_style.font_id,
1513 color: placeholder_style.color,
1514 underline: Default::default(),
1515 },
1516 )],
1517 )
1518 })
1519 .map(|line| LineWithInvisibles {
1520 line,
1521 invisibles: Vec::new(),
1522 })
1523 .collect()
1524 } else {
1525 let style = &self.style;
1526 let chunks = snapshot
1527 .chunks(
1528 rows.clone(),
1529 true,
1530 Some(style.theme.hint),
1531 Some(style.theme.suggestion),
1532 )
1533 .map(|chunk| {
1534 let mut highlight_style = chunk
1535 .syntax_highlight_id
1536 .and_then(|id| id.style(&style.syntax));
1537
1538 if let Some(chunk_highlight) = chunk.highlight_style {
1539 if let Some(highlight_style) = highlight_style.as_mut() {
1540 highlight_style.highlight(chunk_highlight);
1541 } else {
1542 highlight_style = Some(chunk_highlight);
1543 }
1544 }
1545
1546 let mut diagnostic_highlight = HighlightStyle::default();
1547
1548 if chunk.is_unnecessary {
1549 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1550 }
1551
1552 if let Some(severity) = chunk.diagnostic_severity {
1553 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1554 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1555 let diagnostic_style = super::diagnostic_style(severity, true, style);
1556 diagnostic_highlight.underline = Some(Underline {
1557 color: Some(diagnostic_style.message.text.color),
1558 thickness: 1.0.into(),
1559 squiggly: true,
1560 });
1561 }
1562 }
1563
1564 if let Some(highlight_style) = highlight_style.as_mut() {
1565 highlight_style.highlight(diagnostic_highlight);
1566 } else {
1567 highlight_style = Some(diagnostic_highlight);
1568 }
1569
1570 HighlightedChunk {
1571 chunk: chunk.text,
1572 style: highlight_style,
1573 is_tab: chunk.is_tab,
1574 }
1575 });
1576
1577 LineWithInvisibles::from_chunks(
1578 chunks,
1579 &style.text,
1580 cx.text_layout_cache(),
1581 cx.font_cache(),
1582 MAX_LINE_LEN,
1583 rows.len() as usize,
1584 line_number_layouts,
1585 snapshot.mode,
1586 )
1587 }
1588 }
1589
1590 #[allow(clippy::too_many_arguments)]
1591 fn layout_blocks(
1592 &mut self,
1593 rows: Range<u32>,
1594 snapshot: &EditorSnapshot,
1595 editor_width: f32,
1596 scroll_width: f32,
1597 gutter_padding: f32,
1598 gutter_width: f32,
1599 em_width: f32,
1600 text_x: f32,
1601 line_height: f32,
1602 style: &EditorStyle,
1603 line_layouts: &[LineWithInvisibles],
1604 editor: &mut Editor,
1605 cx: &mut LayoutContext<Editor>,
1606 ) -> (f32, Vec<BlockLayout>) {
1607 let mut block_id = 0;
1608 let scroll_x = snapshot.scroll_anchor.offset.x();
1609 let (fixed_blocks, non_fixed_blocks) = snapshot
1610 .blocks_in_range(rows.clone())
1611 .partition::<Vec<_>, _>(|(_, block)| match block {
1612 TransformBlock::ExcerptHeader { .. } => false,
1613 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1614 });
1615 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1616 let mut element = match block {
1617 TransformBlock::Custom(block) => {
1618 let align_to = block
1619 .position()
1620 .to_point(&snapshot.buffer_snapshot)
1621 .to_display_point(snapshot);
1622 let anchor_x = text_x
1623 + if rows.contains(&align_to.row()) {
1624 line_layouts[(align_to.row() - rows.start) as usize]
1625 .line
1626 .x_for_index(align_to.column() as usize)
1627 } else {
1628 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1629 .x_for_index(align_to.column() as usize)
1630 };
1631
1632 block.render(&mut BlockContext {
1633 view_context: cx,
1634 anchor_x,
1635 gutter_padding,
1636 line_height,
1637 scroll_x,
1638 gutter_width,
1639 em_width,
1640 block_id,
1641 })
1642 }
1643 TransformBlock::ExcerptHeader {
1644 id,
1645 buffer,
1646 range,
1647 starts_new_buffer,
1648 ..
1649 } => {
1650 let tooltip_style = theme::current(cx).tooltip.clone();
1651 let include_root = editor
1652 .project
1653 .as_ref()
1654 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1655 .unwrap_or_default();
1656 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1657 let jump_path = ProjectPath {
1658 worktree_id: file.worktree_id(cx),
1659 path: file.path.clone(),
1660 };
1661 let jump_anchor = range
1662 .primary
1663 .as_ref()
1664 .map_or(range.context.start, |primary| primary.start);
1665 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1666
1667 enum JumpIcon {}
1668 MouseEventHandler::<JumpIcon, _>::new((*id).into(), cx, |state, _| {
1669 let style = style.jump_icon.style_for(state);
1670 Svg::new("icons/arrow_up_right_8.svg")
1671 .with_color(style.color)
1672 .constrained()
1673 .with_width(style.icon_width)
1674 .aligned()
1675 .contained()
1676 .with_style(style.container)
1677 .constrained()
1678 .with_width(style.button_width)
1679 .with_height(style.button_width)
1680 })
1681 .with_cursor_style(CursorStyle::PointingHand)
1682 .on_click(MouseButton::Left, move |_, editor, cx| {
1683 if let Some(workspace) = editor
1684 .workspace
1685 .as_ref()
1686 .and_then(|(workspace, _)| workspace.upgrade(cx))
1687 {
1688 workspace.update(cx, |workspace, cx| {
1689 Editor::jump(
1690 workspace,
1691 jump_path.clone(),
1692 jump_position,
1693 jump_anchor,
1694 cx,
1695 );
1696 });
1697 }
1698 })
1699 .with_tooltip::<JumpIcon>(
1700 (*id).into(),
1701 "Jump to Buffer".to_string(),
1702 Some(Box::new(crate::OpenExcerpts)),
1703 tooltip_style.clone(),
1704 cx,
1705 )
1706 .aligned()
1707 .flex_float()
1708 });
1709
1710 if *starts_new_buffer {
1711 let editor_font_size = style.text.font_size;
1712 let style = &style.diagnostic_path_header;
1713 let font_size = (style.text_scale_factor * editor_font_size).round();
1714
1715 let path = buffer.resolve_file_path(cx, include_root);
1716 let mut filename = None;
1717 let mut parent_path = None;
1718 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1719 if let Some(path) = path {
1720 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1721 parent_path =
1722 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1723 }
1724
1725 Flex::row()
1726 .with_child(
1727 Label::new(
1728 filename.unwrap_or_else(|| "untitled".to_string()),
1729 style.filename.text.clone().with_font_size(font_size),
1730 )
1731 .contained()
1732 .with_style(style.filename.container)
1733 .aligned(),
1734 )
1735 .with_children(parent_path.map(|path| {
1736 Label::new(path, style.path.text.clone().with_font_size(font_size))
1737 .contained()
1738 .with_style(style.path.container)
1739 .aligned()
1740 }))
1741 .with_children(jump_icon)
1742 .contained()
1743 .with_style(style.container)
1744 .with_padding_left(gutter_padding)
1745 .with_padding_right(gutter_padding)
1746 .expanded()
1747 .into_any_named("path header block")
1748 } else {
1749 let text_style = style.text.clone();
1750 Flex::row()
1751 .with_child(Label::new("⋯", text_style))
1752 .with_children(jump_icon)
1753 .contained()
1754 .with_padding_left(gutter_padding)
1755 .with_padding_right(gutter_padding)
1756 .expanded()
1757 .into_any_named("collapsed context")
1758 }
1759 }
1760 };
1761
1762 element.layout(
1763 SizeConstraint {
1764 min: Vector2F::zero(),
1765 max: vec2f(width, block.height() as f32 * line_height),
1766 },
1767 editor,
1768 cx,
1769 );
1770 element
1771 };
1772
1773 let mut fixed_block_max_width = 0f32;
1774 let mut blocks = Vec::new();
1775 for (row, block) in fixed_blocks {
1776 let element = render_block(block, f32::INFINITY, block_id);
1777 block_id += 1;
1778 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1779 blocks.push(BlockLayout {
1780 row,
1781 element,
1782 style: BlockStyle::Fixed,
1783 });
1784 }
1785 for (row, block) in non_fixed_blocks {
1786 let style = match block {
1787 TransformBlock::Custom(block) => block.style(),
1788 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1789 };
1790 let width = match style {
1791 BlockStyle::Sticky => editor_width,
1792 BlockStyle::Flex => editor_width
1793 .max(fixed_block_max_width)
1794 .max(gutter_width + scroll_width),
1795 BlockStyle::Fixed => unreachable!(),
1796 };
1797 let element = render_block(block, width, block_id);
1798 block_id += 1;
1799 blocks.push(BlockLayout {
1800 row,
1801 element,
1802 style,
1803 });
1804 }
1805 (
1806 scroll_width.max(fixed_block_max_width - gutter_width),
1807 blocks,
1808 )
1809 }
1810}
1811
1812struct HighlightedChunk<'a> {
1813 chunk: &'a str,
1814 style: Option<HighlightStyle>,
1815 is_tab: bool,
1816}
1817
1818#[derive(Debug)]
1819pub struct LineWithInvisibles {
1820 pub line: Line,
1821 invisibles: Vec<Invisible>,
1822}
1823
1824impl LineWithInvisibles {
1825 fn from_chunks<'a>(
1826 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1827 text_style: &TextStyle,
1828 text_layout_cache: &TextLayoutCache,
1829 font_cache: &Arc<FontCache>,
1830 max_line_len: usize,
1831 max_line_count: usize,
1832 line_number_layouts: &[Option<Line>],
1833 editor_mode: EditorMode,
1834 ) -> Vec<Self> {
1835 let mut layouts = Vec::with_capacity(max_line_count);
1836 let mut line = String::new();
1837 let mut invisibles = Vec::new();
1838 let mut styles = Vec::new();
1839 let mut non_whitespace_added = false;
1840 let mut row = 0;
1841 let mut line_exceeded_max_len = false;
1842 for highlighted_chunk in chunks.chain([HighlightedChunk {
1843 chunk: "\n",
1844 style: None,
1845 is_tab: false,
1846 }]) {
1847 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1848 if ix > 0 {
1849 layouts.push(Self {
1850 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1851 invisibles: invisibles.drain(..).collect(),
1852 });
1853
1854 line.clear();
1855 styles.clear();
1856 row += 1;
1857 line_exceeded_max_len = false;
1858 non_whitespace_added = false;
1859 if row == max_line_count {
1860 return layouts;
1861 }
1862 }
1863
1864 if !line_chunk.is_empty() && !line_exceeded_max_len {
1865 let text_style = if let Some(style) = highlighted_chunk.style {
1866 text_style
1867 .clone()
1868 .highlight(style, font_cache)
1869 .map(Cow::Owned)
1870 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1871 } else {
1872 Cow::Borrowed(text_style)
1873 };
1874
1875 if line.len() + line_chunk.len() > max_line_len {
1876 let mut chunk_len = max_line_len - line.len();
1877 while !line_chunk.is_char_boundary(chunk_len) {
1878 chunk_len -= 1;
1879 }
1880 line_chunk = &line_chunk[..chunk_len];
1881 line_exceeded_max_len = true;
1882 }
1883
1884 styles.push((
1885 line_chunk.len(),
1886 RunStyle {
1887 font_id: text_style.font_id,
1888 color: text_style.color,
1889 underline: text_style.underline,
1890 },
1891 ));
1892
1893 if editor_mode == EditorMode::Full {
1894 // Line wrap pads its contents with fake whitespaces,
1895 // avoid printing them
1896 let inside_wrapped_string = line_number_layouts
1897 .get(row)
1898 .and_then(|layout| layout.as_ref())
1899 .is_none();
1900 if highlighted_chunk.is_tab {
1901 if non_whitespace_added || !inside_wrapped_string {
1902 invisibles.push(Invisible::Tab {
1903 line_start_offset: line.len(),
1904 });
1905 }
1906 } else {
1907 invisibles.extend(
1908 line_chunk
1909 .chars()
1910 .enumerate()
1911 .filter(|(_, line_char)| {
1912 let is_whitespace = line_char.is_whitespace();
1913 non_whitespace_added |= !is_whitespace;
1914 is_whitespace
1915 && (non_whitespace_added || !inside_wrapped_string)
1916 })
1917 .map(|(whitespace_index, _)| Invisible::Whitespace {
1918 line_offset: line.len() + whitespace_index,
1919 }),
1920 )
1921 }
1922 }
1923
1924 line.push_str(line_chunk);
1925 }
1926 }
1927 }
1928
1929 layouts
1930 }
1931
1932 fn draw(
1933 &self,
1934 layout: &LayoutState,
1935 row: u32,
1936 scroll_top: f32,
1937 scene: &mut SceneBuilder,
1938 content_origin: Vector2F,
1939 scroll_left: f32,
1940 visible_text_bounds: RectF,
1941 whitespace_setting: ShowWhitespaceSetting,
1942 selection_ranges: &[Range<DisplayPoint>],
1943 visible_bounds: RectF,
1944 cx: &mut ViewContext<Editor>,
1945 ) {
1946 let line_height = layout.position_map.line_height;
1947 let line_y = row as f32 * line_height - scroll_top;
1948
1949 self.line.paint(
1950 scene,
1951 content_origin + vec2f(-scroll_left, line_y),
1952 visible_text_bounds,
1953 line_height,
1954 cx,
1955 );
1956
1957 self.draw_invisibles(
1958 &selection_ranges,
1959 layout,
1960 content_origin,
1961 scroll_left,
1962 line_y,
1963 row,
1964 scene,
1965 visible_bounds,
1966 line_height,
1967 whitespace_setting,
1968 cx,
1969 );
1970 }
1971
1972 fn draw_invisibles(
1973 &self,
1974 selection_ranges: &[Range<DisplayPoint>],
1975 layout: &LayoutState,
1976 content_origin: Vector2F,
1977 scroll_left: f32,
1978 line_y: f32,
1979 row: u32,
1980 scene: &mut SceneBuilder,
1981 visible_bounds: RectF,
1982 line_height: f32,
1983 whitespace_setting: ShowWhitespaceSetting,
1984 cx: &mut ViewContext<Editor>,
1985 ) {
1986 let allowed_invisibles_regions = match whitespace_setting {
1987 ShowWhitespaceSetting::None => return,
1988 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1989 ShowWhitespaceSetting::All => None,
1990 };
1991
1992 for invisible in &self.invisibles {
1993 let (&token_offset, invisible_symbol) = match invisible {
1994 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1995 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1996 };
1997
1998 let x_offset = self.line.x_for_index(token_offset);
1999 let invisible_offset =
2000 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2001 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2002
2003 if let Some(allowed_regions) = allowed_invisibles_regions {
2004 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2005 if !allowed_regions
2006 .iter()
2007 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2008 {
2009 continue;
2010 }
2011 }
2012 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2013 }
2014 }
2015}
2016
2017#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2018enum Invisible {
2019 Tab { line_start_offset: usize },
2020 Whitespace { line_offset: usize },
2021}
2022
2023impl Element<Editor> for EditorElement {
2024 type LayoutState = LayoutState;
2025 type PaintState = ();
2026
2027 fn layout(
2028 &mut self,
2029 constraint: SizeConstraint,
2030 editor: &mut Editor,
2031 cx: &mut LayoutContext<Editor>,
2032 ) -> (Vector2F, Self::LayoutState) {
2033 let mut size = constraint.max;
2034 if size.x().is_infinite() {
2035 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2036 }
2037
2038 let snapshot = editor.snapshot(cx);
2039 let style = self.style.clone();
2040
2041 let line_height = (style.text.font_size * style.line_height_scalar).round();
2042
2043 let gutter_padding;
2044 let gutter_width;
2045 let gutter_margin;
2046 if snapshot.show_gutter {
2047 let em_width = style.text.em_width(cx.font_cache());
2048 gutter_padding = (em_width * style.gutter_padding_factor).round();
2049 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2050 gutter_margin = -style.text.descent(cx.font_cache());
2051 } else {
2052 gutter_padding = 0.0;
2053 gutter_width = 0.0;
2054 gutter_margin = 0.0;
2055 };
2056
2057 let text_width = size.x() - gutter_width;
2058 let em_width = style.text.em_width(cx.font_cache());
2059 let em_advance = style.text.em_advance(cx.font_cache());
2060 let overscroll = vec2f(em_width, 0.);
2061 let snapshot = {
2062 editor.set_visible_line_count(size.y() / line_height, cx);
2063
2064 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2065 let wrap_width = match editor.soft_wrap_mode(cx) {
2066 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2067 SoftWrap::EditorWidth => editor_width,
2068 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2069 };
2070
2071 if editor.set_wrap_width(Some(wrap_width), cx) {
2072 editor.snapshot(cx)
2073 } else {
2074 snapshot
2075 }
2076 };
2077
2078 let wrap_guides = editor
2079 .wrap_guides(cx)
2080 .iter()
2081 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2082 .collect();
2083
2084 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2085 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2086 size.set_y(
2087 scroll_height
2088 .min(constraint.max_along(Axis::Vertical))
2089 .max(constraint.min_along(Axis::Vertical))
2090 .min(line_height * max_lines as f32),
2091 )
2092 } else if let EditorMode::SingleLine = snapshot.mode {
2093 size.set_y(
2094 line_height
2095 .min(constraint.max_along(Axis::Vertical))
2096 .max(constraint.min_along(Axis::Vertical)),
2097 )
2098 } else if size.y().is_infinite() {
2099 size.set_y(scroll_height);
2100 }
2101 let gutter_size = vec2f(gutter_width, size.y());
2102 let text_size = vec2f(text_width, size.y());
2103
2104 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2105 let mut snapshot = editor.snapshot(cx);
2106
2107 let scroll_position = snapshot.scroll_position();
2108 // The scroll position is a fractional point, the whole number of which represents
2109 // the top of the window in terms of display rows.
2110 let start_row = scroll_position.y() as u32;
2111 let height_in_lines = size.y() / line_height;
2112 let max_row = snapshot.max_point().row();
2113
2114 // Add 1 to ensure selections bleed off screen
2115 let end_row = 1 + cmp::min(
2116 (scroll_position.y() + height_in_lines).ceil() as u32,
2117 max_row,
2118 );
2119
2120 let start_anchor = if start_row == 0 {
2121 Anchor::min()
2122 } else {
2123 snapshot
2124 .buffer_snapshot
2125 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2126 };
2127 let end_anchor = if end_row > max_row {
2128 Anchor::max()
2129 } else {
2130 snapshot
2131 .buffer_snapshot
2132 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2133 };
2134
2135 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
2136 let mut active_rows = BTreeMap::new();
2137 let mut fold_ranges = Vec::new();
2138 let is_singleton = editor.is_singleton(cx);
2139
2140 let highlighted_rows = editor.highlighted_rows();
2141 let theme = theme::current(cx);
2142 let highlighted_ranges = editor.background_highlights_in_range(
2143 start_anchor..end_anchor,
2144 &snapshot.display_snapshot,
2145 theme.as_ref(),
2146 );
2147
2148 fold_ranges.extend(
2149 snapshot
2150 .folds_in_range(start_anchor..end_anchor)
2151 .map(|anchor| {
2152 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2153 (
2154 start.row,
2155 start.to_display_point(&snapshot.display_snapshot)
2156 ..anchor.end.to_display_point(&snapshot),
2157 )
2158 }),
2159 );
2160
2161 let mut remote_selections = HashMap::default();
2162 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2163 .buffer_snapshot
2164 .remote_selections_in_range(&(start_anchor..end_anchor))
2165 {
2166 // The local selections match the leader's selections.
2167 if Some(replica_id) == editor.leader_replica_id {
2168 continue;
2169 }
2170 remote_selections
2171 .entry(replica_id)
2172 .or_insert(Vec::new())
2173 .push(SelectionLayout::new(
2174 selection,
2175 line_mode,
2176 cursor_shape,
2177 &snapshot.display_snapshot,
2178 false,
2179 ));
2180 }
2181 selections.extend(remote_selections);
2182
2183 if editor.show_local_selections {
2184 let mut local_selections = editor
2185 .selections
2186 .disjoint_in_range(start_anchor..end_anchor, cx);
2187 local_selections.extend(editor.selections.pending(cx));
2188 let newest = editor.selections.newest(cx);
2189 for selection in &local_selections {
2190 let is_empty = selection.start == selection.end;
2191 let selection_start = snapshot.prev_line_boundary(selection.start).1;
2192 let mut selection_end = snapshot.next_line_boundary(selection.end).1;
2193
2194 // in vim visual mode the newline is considered at the end of the previous line
2195 // instead of at the start of the current line
2196 if editor.cursor_shape == CursorShape::Block
2197 && !is_empty
2198 && !selection.reversed
2199 && selection.end.column == 0
2200 && selection_end.row() > 0
2201 && selection_end.row() < snapshot.max_buffer_row()
2202 {
2203 selection_end = DisplayPoint::new(selection_end.row() - 1, 0);
2204 }
2205 for row in cmp::max(selection_start.row(), start_row)
2206 ..=cmp::min(selection_end.row(), end_row)
2207 {
2208 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2209 *contains_non_empty_selection |= !is_empty;
2210 }
2211 }
2212
2213 // Render the local selections in the leader's color when following.
2214 let local_replica_id = editor
2215 .leader_replica_id
2216 .unwrap_or_else(|| editor.replica_id(cx));
2217
2218 selections.push((
2219 local_replica_id,
2220 local_selections
2221 .into_iter()
2222 .map(|selection| {
2223 let is_newest = selection == newest;
2224 SelectionLayout::new(
2225 selection,
2226 editor.selections.line_mode,
2227 editor.cursor_shape,
2228 &snapshot.display_snapshot,
2229 is_newest,
2230 )
2231 })
2232 .collect(),
2233 ));
2234 }
2235
2236 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2237 let show_scrollbars = match scrollbar_settings.show {
2238 ShowScrollbar::Auto => {
2239 // Git
2240 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2241 ||
2242 // Selections
2243 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2244 // Scrollmanager
2245 || editor.scroll_manager.scrollbars_visible()
2246 }
2247 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2248 ShowScrollbar::Always => true,
2249 ShowScrollbar::Never => false,
2250 };
2251
2252 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2253 .into_iter()
2254 .map(|(id, fold)| {
2255 let color = self
2256 .style
2257 .folds
2258 .ellipses
2259 .background
2260 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2261 .color;
2262
2263 (id, fold, color)
2264 })
2265 .collect();
2266
2267 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2268 start_row..end_row,
2269 &active_rows,
2270 is_singleton,
2271 &snapshot,
2272 cx,
2273 );
2274
2275 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2276
2277 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2278
2279 let mut max_visible_line_width = 0.0;
2280 let line_layouts =
2281 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2282 for line_with_invisibles in &line_layouts {
2283 if line_with_invisibles.line.width() > max_visible_line_width {
2284 max_visible_line_width = line_with_invisibles.line.width();
2285 }
2286 }
2287
2288 let style = self.style.clone();
2289 let longest_line_width = layout_line(
2290 snapshot.longest_row(),
2291 &snapshot,
2292 &style,
2293 cx.text_layout_cache(),
2294 )
2295 .width();
2296 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2297 let em_width = style.text.em_width(cx.font_cache());
2298 let (scroll_width, blocks) = self.layout_blocks(
2299 start_row..end_row,
2300 &snapshot,
2301 size.x(),
2302 scroll_width,
2303 gutter_padding,
2304 gutter_width,
2305 em_width,
2306 gutter_width + gutter_margin,
2307 line_height,
2308 &style,
2309 &line_layouts,
2310 editor,
2311 cx,
2312 );
2313
2314 let scroll_max = vec2f(
2315 ((scroll_width - text_size.x()) / em_width).max(0.0),
2316 max_row as f32,
2317 );
2318
2319 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2320
2321 let autoscrolled = if autoscroll_horizontally {
2322 editor.autoscroll_horizontally(
2323 start_row,
2324 text_size.x(),
2325 scroll_width,
2326 em_width,
2327 &line_layouts,
2328 cx,
2329 )
2330 } else {
2331 false
2332 };
2333
2334 if clamped || autoscrolled {
2335 snapshot = editor.snapshot(cx);
2336 }
2337
2338 let newest_selection_head = editor
2339 .selections
2340 .newest::<usize>(cx)
2341 .head()
2342 .to_display_point(&snapshot);
2343 let style = editor.style(cx);
2344
2345 let mut context_menu = None;
2346 let mut code_actions_indicator = None;
2347 if (start_row..end_row).contains(&newest_selection_head.row()) {
2348 if editor.context_menu_visible() {
2349 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2350 }
2351
2352 let active = matches!(
2353 editor.context_menu,
2354 Some(crate::ContextMenu::CodeActions(_))
2355 );
2356
2357 code_actions_indicator = editor
2358 .render_code_actions_indicator(&style, active, cx)
2359 .map(|indicator| (newest_selection_head.row(), indicator));
2360 }
2361
2362 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2363 let mut hover = editor
2364 .hover_state
2365 .render(&snapshot, &style, visible_rows, cx);
2366 let mode = editor.mode;
2367
2368 let mut fold_indicators = editor.render_fold_indicators(
2369 fold_statuses,
2370 &style,
2371 editor.gutter_hovered,
2372 line_height,
2373 gutter_margin,
2374 cx,
2375 );
2376
2377 if let Some((_, context_menu)) = context_menu.as_mut() {
2378 context_menu.layout(
2379 SizeConstraint {
2380 min: Vector2F::zero(),
2381 max: vec2f(
2382 cx.window_size().x() * 0.7,
2383 (12. * line_height).min((size.y() - line_height) / 2.),
2384 ),
2385 },
2386 editor,
2387 cx,
2388 );
2389 }
2390
2391 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2392 indicator.layout(
2393 SizeConstraint::strict_along(
2394 Axis::Vertical,
2395 line_height * style.code_actions.vertical_scale,
2396 ),
2397 editor,
2398 cx,
2399 );
2400 }
2401
2402 for fold_indicator in fold_indicators.iter_mut() {
2403 if let Some(indicator) = fold_indicator.as_mut() {
2404 indicator.layout(
2405 SizeConstraint::strict_along(
2406 Axis::Vertical,
2407 line_height * style.code_actions.vertical_scale,
2408 ),
2409 editor,
2410 cx,
2411 );
2412 }
2413 }
2414
2415 if let Some((_, hover_popovers)) = hover.as_mut() {
2416 for hover_popover in hover_popovers.iter_mut() {
2417 hover_popover.layout(
2418 SizeConstraint {
2419 min: Vector2F::zero(),
2420 max: vec2f(
2421 (120. * em_width) // Default size
2422 .min(size.x() / 2.) // Shrink to half of the editor width
2423 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2424 (16. * line_height) // Default size
2425 .min(size.y() / 2.) // Shrink to half of the editor height
2426 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2427 ),
2428 },
2429 editor,
2430 cx,
2431 );
2432 }
2433 }
2434
2435 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2436 let invisible_symbol_style = RunStyle {
2437 color: self.style.whitespace,
2438 font_id: self.style.text.font_id,
2439 underline: Default::default(),
2440 };
2441
2442 (
2443 size,
2444 LayoutState {
2445 mode,
2446 position_map: Arc::new(PositionMap {
2447 size,
2448 scroll_max,
2449 line_layouts,
2450 line_height,
2451 em_width,
2452 em_advance,
2453 snapshot,
2454 }),
2455 visible_display_row_range: start_row..end_row,
2456 wrap_guides,
2457 gutter_size,
2458 gutter_padding,
2459 text_size,
2460 scrollbar_row_range,
2461 show_scrollbars,
2462 is_singleton,
2463 max_row,
2464 gutter_margin,
2465 active_rows,
2466 highlighted_rows,
2467 highlighted_ranges,
2468 fold_ranges,
2469 line_number_layouts,
2470 display_hunks,
2471 blocks,
2472 selections,
2473 context_menu,
2474 code_actions_indicator,
2475 fold_indicators,
2476 tab_invisible: cx.text_layout_cache().layout_str(
2477 "→",
2478 invisible_symbol_font_size,
2479 &[("→".len(), invisible_symbol_style)],
2480 ),
2481 space_invisible: cx.text_layout_cache().layout_str(
2482 "•",
2483 invisible_symbol_font_size,
2484 &[("•".len(), invisible_symbol_style)],
2485 ),
2486 hover_popovers: hover,
2487 },
2488 )
2489 }
2490
2491 fn paint(
2492 &mut self,
2493 scene: &mut SceneBuilder,
2494 bounds: RectF,
2495 visible_bounds: RectF,
2496 layout: &mut Self::LayoutState,
2497 editor: &mut Editor,
2498 cx: &mut ViewContext<Editor>,
2499 ) -> Self::PaintState {
2500 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2501 scene.push_layer(Some(visible_bounds));
2502
2503 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2504 let text_bounds = RectF::new(
2505 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2506 layout.text_size,
2507 );
2508
2509 Self::attach_mouse_handlers(
2510 scene,
2511 &layout.position_map,
2512 layout.hover_popovers.is_some(),
2513 visible_bounds,
2514 text_bounds,
2515 gutter_bounds,
2516 bounds,
2517 cx,
2518 );
2519
2520 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2521 if layout.gutter_size.x() > 0. {
2522 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2523 }
2524 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2525
2526 scene.push_layer(Some(bounds));
2527 if !layout.blocks.is_empty() {
2528 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2529 }
2530 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2531 scene.pop_layer();
2532
2533 scene.pop_layer();
2534 }
2535
2536 fn rect_for_text_range(
2537 &self,
2538 range_utf16: Range<usize>,
2539 bounds: RectF,
2540 _: RectF,
2541 layout: &Self::LayoutState,
2542 _: &Self::PaintState,
2543 _: &Editor,
2544 _: &ViewContext<Editor>,
2545 ) -> Option<RectF> {
2546 let text_bounds = RectF::new(
2547 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2548 layout.text_size,
2549 );
2550 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2551 let scroll_position = layout.position_map.snapshot.scroll_position();
2552 let start_row = scroll_position.y() as u32;
2553 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2554 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2555
2556 let range_start = OffsetUtf16(range_utf16.start)
2557 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2558 if range_start.row() < start_row {
2559 return None;
2560 }
2561
2562 let line = &layout
2563 .position_map
2564 .line_layouts
2565 .get((range_start.row() - start_row) as usize)?
2566 .line;
2567 let range_start_x = line.x_for_index(range_start.column() as usize);
2568 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2569 Some(RectF::new(
2570 content_origin
2571 + vec2f(
2572 range_start_x,
2573 range_start_y + layout.position_map.line_height,
2574 )
2575 - vec2f(scroll_left, scroll_top),
2576 vec2f(
2577 layout.position_map.em_width,
2578 layout.position_map.line_height,
2579 ),
2580 ))
2581 }
2582
2583 fn debug(
2584 &self,
2585 bounds: RectF,
2586 _: &Self::LayoutState,
2587 _: &Self::PaintState,
2588 _: &Editor,
2589 _: &ViewContext<Editor>,
2590 ) -> json::Value {
2591 json!({
2592 "type": "BufferElement",
2593 "bounds": bounds.to_json()
2594 })
2595 }
2596}
2597
2598type BufferRow = u32;
2599
2600pub struct LayoutState {
2601 position_map: Arc<PositionMap>,
2602 gutter_size: Vector2F,
2603 gutter_padding: f32,
2604 gutter_margin: f32,
2605 text_size: Vector2F,
2606 mode: EditorMode,
2607 wrap_guides: SmallVec<[(f32, bool); 2]>,
2608 visible_display_row_range: Range<u32>,
2609 active_rows: BTreeMap<u32, bool>,
2610 highlighted_rows: Option<Range<u32>>,
2611 line_number_layouts: Vec<Option<text_layout::Line>>,
2612 display_hunks: Vec<DisplayDiffHunk>,
2613 blocks: Vec<BlockLayout>,
2614 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2615 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2616 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2617 scrollbar_row_range: Range<f32>,
2618 show_scrollbars: bool,
2619 is_singleton: bool,
2620 max_row: u32,
2621 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2622 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2623 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2624 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2625 tab_invisible: Line,
2626 space_invisible: Line,
2627}
2628
2629struct PositionMap {
2630 size: Vector2F,
2631 line_height: f32,
2632 scroll_max: Vector2F,
2633 em_width: f32,
2634 em_advance: f32,
2635 line_layouts: Vec<LineWithInvisibles>,
2636 snapshot: EditorSnapshot,
2637}
2638
2639impl PositionMap {
2640 /// Returns two display points:
2641 /// 1. The nearest *valid* position in the editor
2642 /// 2. An unclipped, potentially *invalid* position that maps directly to
2643 /// the given pixel position.
2644 fn point_for_position(
2645 &self,
2646 text_bounds: RectF,
2647 position: Vector2F,
2648 ) -> (DisplayPoint, DisplayPoint) {
2649 let scroll_position = self.snapshot.scroll_position();
2650 let position = position - text_bounds.origin();
2651 let y = position.y().max(0.0).min(self.size.y());
2652 let x = position.x() + (scroll_position.x() * self.em_width);
2653 let row = (y / self.line_height + scroll_position.y()) as u32;
2654 let (column, x_overshoot) = if let Some(line) = self
2655 .line_layouts
2656 .get(row as usize - scroll_position.y() as usize)
2657 .map(|line_with_spaces| &line_with_spaces.line)
2658 {
2659 if let Some(ix) = line.index_for_x(x) {
2660 (ix as u32, 0.0)
2661 } else {
2662 (line.len() as u32, 0f32.max(x - line.width()))
2663 }
2664 } else {
2665 (0, x)
2666 };
2667
2668 let mut target_point = DisplayPoint::new(row, column);
2669 let point = self.snapshot.clip_point(target_point, Bias::Left);
2670 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2671
2672 (point, target_point)
2673 }
2674}
2675
2676struct BlockLayout {
2677 row: u32,
2678 element: AnyElement<Editor>,
2679 style: BlockStyle,
2680}
2681
2682fn layout_line(
2683 row: u32,
2684 snapshot: &EditorSnapshot,
2685 style: &EditorStyle,
2686 layout_cache: &TextLayoutCache,
2687) -> text_layout::Line {
2688 let mut line = snapshot.line(row);
2689
2690 if line.len() > MAX_LINE_LEN {
2691 let mut len = MAX_LINE_LEN;
2692 while !line.is_char_boundary(len) {
2693 len -= 1;
2694 }
2695
2696 line.truncate(len);
2697 }
2698
2699 layout_cache.layout_str(
2700 &line,
2701 style.text.font_size,
2702 &[(
2703 snapshot.line_len(row) as usize,
2704 RunStyle {
2705 font_id: style.text.font_id,
2706 color: Color::black(),
2707 underline: Default::default(),
2708 },
2709 )],
2710 )
2711}
2712
2713#[derive(Debug)]
2714pub struct Cursor {
2715 origin: Vector2F,
2716 block_width: f32,
2717 line_height: f32,
2718 color: Color,
2719 shape: CursorShape,
2720 block_text: Option<Line>,
2721}
2722
2723impl Cursor {
2724 pub fn new(
2725 origin: Vector2F,
2726 block_width: f32,
2727 line_height: f32,
2728 color: Color,
2729 shape: CursorShape,
2730 block_text: Option<Line>,
2731 ) -> Cursor {
2732 Cursor {
2733 origin,
2734 block_width,
2735 line_height,
2736 color,
2737 shape,
2738 block_text,
2739 }
2740 }
2741
2742 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2743 RectF::new(
2744 self.origin + origin,
2745 vec2f(self.block_width, self.line_height),
2746 )
2747 }
2748
2749 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2750 let bounds = match self.shape {
2751 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2752 CursorShape::Block | CursorShape::Hollow => RectF::new(
2753 self.origin + origin,
2754 vec2f(self.block_width, self.line_height),
2755 ),
2756 CursorShape::Underscore => RectF::new(
2757 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2758 vec2f(self.block_width, 2.0),
2759 ),
2760 };
2761
2762 //Draw background or border quad
2763 if matches!(self.shape, CursorShape::Hollow) {
2764 scene.push_quad(Quad {
2765 bounds,
2766 background: None,
2767 border: Border::all(1., self.color),
2768 corner_radius: 0.,
2769 });
2770 } else {
2771 scene.push_quad(Quad {
2772 bounds,
2773 background: Some(self.color),
2774 border: Default::default(),
2775 corner_radius: 0.,
2776 });
2777 }
2778
2779 if let Some(block_text) = &self.block_text {
2780 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2781 }
2782 }
2783
2784 pub fn shape(&self) -> CursorShape {
2785 self.shape
2786 }
2787}
2788
2789#[derive(Debug)]
2790pub struct HighlightedRange {
2791 pub start_y: f32,
2792 pub line_height: f32,
2793 pub lines: Vec<HighlightedRangeLine>,
2794 pub color: Color,
2795 pub corner_radius: f32,
2796}
2797
2798#[derive(Debug)]
2799pub struct HighlightedRangeLine {
2800 pub start_x: f32,
2801 pub end_x: f32,
2802}
2803
2804impl HighlightedRange {
2805 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2806 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2807 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2808 self.paint_lines(
2809 self.start_y + self.line_height,
2810 &self.lines[1..],
2811 bounds,
2812 scene,
2813 );
2814 } else {
2815 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2816 }
2817 }
2818
2819 fn paint_lines(
2820 &self,
2821 start_y: f32,
2822 lines: &[HighlightedRangeLine],
2823 bounds: RectF,
2824 scene: &mut SceneBuilder,
2825 ) {
2826 if lines.is_empty() {
2827 return;
2828 }
2829
2830 let mut path = PathBuilder::new();
2831 let first_line = lines.first().unwrap();
2832 let last_line = lines.last().unwrap();
2833
2834 let first_top_left = vec2f(first_line.start_x, start_y);
2835 let first_top_right = vec2f(first_line.end_x, start_y);
2836
2837 let curve_height = vec2f(0., self.corner_radius);
2838 let curve_width = |start_x: f32, end_x: f32| {
2839 let max = (end_x - start_x) / 2.;
2840 let width = if max < self.corner_radius {
2841 max
2842 } else {
2843 self.corner_radius
2844 };
2845
2846 vec2f(width, 0.)
2847 };
2848
2849 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2850 path.reset(first_top_right - top_curve_width);
2851 path.curve_to(first_top_right + curve_height, first_top_right);
2852
2853 let mut iter = lines.iter().enumerate().peekable();
2854 while let Some((ix, line)) = iter.next() {
2855 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2856
2857 if let Some((_, next_line)) = iter.peek() {
2858 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2859
2860 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2861 Ordering::Equal => {
2862 path.line_to(bottom_right);
2863 }
2864 Ordering::Less => {
2865 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2866 path.line_to(bottom_right - curve_height);
2867 if self.corner_radius > 0. {
2868 path.curve_to(bottom_right - curve_width, bottom_right);
2869 }
2870 path.line_to(next_top_right + curve_width);
2871 if self.corner_radius > 0. {
2872 path.curve_to(next_top_right + curve_height, next_top_right);
2873 }
2874 }
2875 Ordering::Greater => {
2876 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2877 path.line_to(bottom_right - curve_height);
2878 if self.corner_radius > 0. {
2879 path.curve_to(bottom_right + curve_width, bottom_right);
2880 }
2881 path.line_to(next_top_right - curve_width);
2882 if self.corner_radius > 0. {
2883 path.curve_to(next_top_right + curve_height, next_top_right);
2884 }
2885 }
2886 }
2887 } else {
2888 let curve_width = curve_width(line.start_x, line.end_x);
2889 path.line_to(bottom_right - curve_height);
2890 if self.corner_radius > 0. {
2891 path.curve_to(bottom_right - curve_width, bottom_right);
2892 }
2893
2894 let bottom_left = vec2f(line.start_x, bottom_right.y());
2895 path.line_to(bottom_left + curve_width);
2896 if self.corner_radius > 0. {
2897 path.curve_to(bottom_left - curve_height, bottom_left);
2898 }
2899 }
2900 }
2901
2902 if first_line.start_x > last_line.start_x {
2903 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2904 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2905 path.line_to(second_top_left + curve_height);
2906 if self.corner_radius > 0. {
2907 path.curve_to(second_top_left + curve_width, second_top_left);
2908 }
2909 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2910 path.line_to(first_bottom_left - curve_width);
2911 if self.corner_radius > 0. {
2912 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2913 }
2914 }
2915
2916 path.line_to(first_top_left + curve_height);
2917 if self.corner_radius > 0. {
2918 path.curve_to(first_top_left + top_curve_width, first_top_left);
2919 }
2920 path.line_to(first_top_right - top_curve_width);
2921
2922 scene.push_path(path.build(self.color, Some(bounds)));
2923 }
2924}
2925
2926fn position_to_display_point(
2927 position: Vector2F,
2928 text_bounds: RectF,
2929 position_map: &PositionMap,
2930) -> Option<DisplayPoint> {
2931 if text_bounds.contains_point(position) {
2932 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2933 if point == target_point {
2934 Some(point)
2935 } else {
2936 None
2937 }
2938 } else {
2939 None
2940 }
2941}
2942
2943fn range_to_bounds(
2944 range: &Range<DisplayPoint>,
2945 content_origin: Vector2F,
2946 scroll_left: f32,
2947 scroll_top: f32,
2948 visible_row_range: &Range<u32>,
2949 line_end_overshoot: f32,
2950 position_map: &PositionMap,
2951) -> impl Iterator<Item = RectF> {
2952 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2953
2954 if range.start == range.end {
2955 return bounds.into_iter();
2956 }
2957
2958 let start_row = visible_row_range.start;
2959 let end_row = visible_row_range.end;
2960
2961 let row_range = if range.end.column() == 0 {
2962 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2963 } else {
2964 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2965 };
2966
2967 let first_y =
2968 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2969
2970 for (idx, row) in row_range.enumerate() {
2971 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2972
2973 let start_x = if row == range.start.row() {
2974 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2975 - scroll_left
2976 } else {
2977 content_origin.x() - scroll_left
2978 };
2979
2980 let end_x = if row == range.end.row() {
2981 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2982 } else {
2983 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2984 };
2985
2986 bounds.push(RectF::from_points(
2987 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2988 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2989 ))
2990 }
2991
2992 bounds.into_iter()
2993}
2994
2995pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2996 delta.powf(1.5) / 100.0
2997}
2998
2999fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3000 delta.powf(1.2) / 300.0
3001}
3002
3003#[cfg(test)]
3004mod tests {
3005 use super::*;
3006 use crate::{
3007 display_map::{BlockDisposition, BlockProperties},
3008 editor_tests::{init_test, update_test_language_settings},
3009 Editor, MultiBuffer,
3010 };
3011 use gpui::TestAppContext;
3012 use language::language_settings;
3013 use log::info;
3014 use std::{num::NonZeroU32, sync::Arc};
3015 use util::test::sample_text;
3016
3017 #[gpui::test]
3018 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3019 init_test(cx, |_| {});
3020
3021 let (_, editor) = cx.add_window(|cx| {
3022 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3023 Editor::new(EditorMode::Full, buffer, None, None, cx)
3024 });
3025 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3026
3027 let layouts = editor.update(cx, |editor, cx| {
3028 let snapshot = editor.snapshot(cx);
3029 element
3030 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
3031 .0
3032 });
3033 assert_eq!(layouts.len(), 6);
3034 }
3035
3036 #[gpui::test]
3037 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3038 init_test(cx, |_| {});
3039
3040 let (_, editor) = cx.add_window(|cx| {
3041 let buffer = MultiBuffer::build_simple("", cx);
3042 Editor::new(EditorMode::Full, buffer, None, None, cx)
3043 });
3044
3045 editor.update(cx, |editor, cx| {
3046 editor.set_placeholder_text("hello", cx);
3047 editor.insert_blocks(
3048 [BlockProperties {
3049 style: BlockStyle::Fixed,
3050 disposition: BlockDisposition::Above,
3051 height: 3,
3052 position: Anchor::min(),
3053 render: Arc::new(|_| Empty::new().into_any()),
3054 }],
3055 None,
3056 cx,
3057 );
3058
3059 // Blur the editor so that it displays placeholder text.
3060 cx.blur();
3061 });
3062
3063 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3064 let (size, mut state) = editor.update(cx, |editor, cx| {
3065 let mut new_parents = Default::default();
3066 let mut notify_views_if_parents_change = Default::default();
3067 let mut layout_cx = LayoutContext::new(
3068 cx,
3069 &mut new_parents,
3070 &mut notify_views_if_parents_change,
3071 false,
3072 );
3073 element.layout(
3074 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3075 editor,
3076 &mut layout_cx,
3077 )
3078 });
3079
3080 assert_eq!(state.position_map.line_layouts.len(), 4);
3081 assert_eq!(
3082 state
3083 .line_number_layouts
3084 .iter()
3085 .map(Option::is_some)
3086 .collect::<Vec<_>>(),
3087 &[false, false, false, true]
3088 );
3089
3090 // Don't panic.
3091 let mut scene = SceneBuilder::new(1.0);
3092 let bounds = RectF::new(Default::default(), size);
3093 editor.update(cx, |editor, cx| {
3094 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
3095 });
3096 }
3097
3098 #[gpui::test]
3099 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3100 const TAB_SIZE: u32 = 4;
3101
3102 let input_text = "\t \t|\t| a b";
3103 let expected_invisibles = vec![
3104 Invisible::Tab {
3105 line_start_offset: 0,
3106 },
3107 Invisible::Whitespace {
3108 line_offset: TAB_SIZE as usize,
3109 },
3110 Invisible::Tab {
3111 line_start_offset: TAB_SIZE as usize + 1,
3112 },
3113 Invisible::Tab {
3114 line_start_offset: TAB_SIZE as usize * 2 + 1,
3115 },
3116 Invisible::Whitespace {
3117 line_offset: TAB_SIZE as usize * 3 + 1,
3118 },
3119 Invisible::Whitespace {
3120 line_offset: TAB_SIZE as usize * 3 + 3,
3121 },
3122 ];
3123 assert_eq!(
3124 expected_invisibles.len(),
3125 input_text
3126 .chars()
3127 .filter(|initial_char| initial_char.is_whitespace())
3128 .count(),
3129 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3130 );
3131
3132 init_test(cx, |s| {
3133 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3134 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3135 });
3136
3137 let actual_invisibles =
3138 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3139
3140 assert_eq!(expected_invisibles, actual_invisibles);
3141 }
3142
3143 #[gpui::test]
3144 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3145 init_test(cx, |s| {
3146 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3147 s.defaults.tab_size = NonZeroU32::new(4);
3148 });
3149
3150 for editor_mode_without_invisibles in [
3151 EditorMode::SingleLine,
3152 EditorMode::AutoHeight { max_lines: 100 },
3153 ] {
3154 let invisibles = collect_invisibles_from_new_editor(
3155 cx,
3156 editor_mode_without_invisibles,
3157 "\t\t\t| | a b",
3158 500.0,
3159 );
3160 assert!(invisibles.is_empty(),
3161 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3162 }
3163 }
3164
3165 #[gpui::test]
3166 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3167 let tab_size = 4;
3168 let input_text = "a\tbcd ".repeat(9);
3169 let repeated_invisibles = [
3170 Invisible::Tab {
3171 line_start_offset: 1,
3172 },
3173 Invisible::Whitespace {
3174 line_offset: tab_size as usize + 3,
3175 },
3176 Invisible::Whitespace {
3177 line_offset: tab_size as usize + 4,
3178 },
3179 Invisible::Whitespace {
3180 line_offset: tab_size as usize + 5,
3181 },
3182 ];
3183 let expected_invisibles = std::iter::once(repeated_invisibles)
3184 .cycle()
3185 .take(9)
3186 .flatten()
3187 .collect::<Vec<_>>();
3188 assert_eq!(
3189 expected_invisibles.len(),
3190 input_text
3191 .chars()
3192 .filter(|initial_char| initial_char.is_whitespace())
3193 .count(),
3194 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3195 );
3196 info!("Expected invisibles: {expected_invisibles:?}");
3197
3198 init_test(cx, |_| {});
3199
3200 // Put the same string with repeating whitespace pattern into editors of various size,
3201 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3202 let resize_step = 10.0;
3203 let mut editor_width = 200.0;
3204 while editor_width <= 1000.0 {
3205 update_test_language_settings(cx, |s| {
3206 s.defaults.tab_size = NonZeroU32::new(tab_size);
3207 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3208 s.defaults.preferred_line_length = Some(editor_width as u32);
3209 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3210 });
3211
3212 let actual_invisibles =
3213 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3214
3215 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3216 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3217 let mut i = 0;
3218 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3219 i = actual_index;
3220 match expected_invisibles.get(i) {
3221 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3222 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3223 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3224 _ => {
3225 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3226 }
3227 },
3228 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3229 }
3230 }
3231 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3232 assert!(
3233 missing_expected_invisibles.is_empty(),
3234 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3235 );
3236
3237 editor_width += resize_step;
3238 }
3239 }
3240
3241 fn collect_invisibles_from_new_editor(
3242 cx: &mut TestAppContext,
3243 editor_mode: EditorMode,
3244 input_text: &str,
3245 editor_width: f32,
3246 ) -> Vec<Invisible> {
3247 info!(
3248 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3249 );
3250 let (_, editor) = cx.add_window(|cx| {
3251 let buffer = MultiBuffer::build_simple(&input_text, cx);
3252 Editor::new(editor_mode, buffer, None, None, cx)
3253 });
3254
3255 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3256 let (_, layout_state) = editor.update(cx, |editor, cx| {
3257 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3258 editor.set_wrap_width(Some(editor_width), cx);
3259
3260 let mut new_parents = Default::default();
3261 let mut notify_views_if_parents_change = Default::default();
3262 let mut layout_cx = LayoutContext::new(
3263 cx,
3264 &mut new_parents,
3265 &mut notify_views_if_parents_change,
3266 false,
3267 );
3268 element.layout(
3269 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3270 editor,
3271 &mut layout_cx,
3272 )
3273 });
3274
3275 layout_state
3276 .position_map
3277 .line_layouts
3278 .iter()
3279 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3280 .flatten()
3281 .cloned()
3282 .collect()
3283 }
3284}