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, InlayPoint, 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, PaintContext, 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 InlayHintLabelPart, ProjectPath,
46};
47use smallvec::SmallVec;
48use std::{
49 borrow::Cow,
50 cmp::{self, Ordering},
51 fmt::Write,
52 iter,
53 ops::Range,
54 sync::Arc,
55};
56use text::Point;
57use workspace::item::Item;
58
59enum FoldMarkers {}
60
61struct SelectionLayout {
62 head: DisplayPoint,
63 cursor_shape: CursorShape,
64 is_newest: bool,
65 is_local: bool,
66 range: Range<DisplayPoint>,
67 active_rows: Range<u32>,
68}
69
70impl SelectionLayout {
71 fn new<T: ToPoint + ToDisplayPoint + Clone>(
72 selection: Selection<T>,
73 line_mode: bool,
74 cursor_shape: CursorShape,
75 map: &DisplaySnapshot,
76 is_newest: bool,
77 is_local: bool,
78 ) -> Self {
79 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
80 let display_selection = point_selection.map(|p| p.to_display_point(map));
81 let mut range = display_selection.range();
82 let mut head = display_selection.head();
83 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
84 ..map.next_line_boundary(point_selection.end).1.row();
85
86 // vim visual line mode
87 if line_mode {
88 let point_range = map.expand_to_line(point_selection.range());
89 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
90 }
91
92 // any vim visual mode (including line mode)
93 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
94 if head.column() > 0 {
95 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
96 } else if head.row() > 0 && head != map.max_point() {
97 head = map.clip_point(
98 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
99 Bias::Left,
100 );
101 // updating range.end is a no-op unless you're cursor is
102 // on the newline containing a multi-buffer divider
103 // in which case the clip_point may have moved the head up
104 // an additional row.
105 range.end = DisplayPoint::new(head.row() + 1, 0);
106 active_rows.end = head.row();
107 }
108 }
109
110 Self {
111 head,
112 cursor_shape,
113 is_newest,
114 is_local,
115 range,
116 active_rows,
117 }
118 }
119}
120
121pub struct EditorElement {
122 style: Arc<EditorStyle>,
123}
124
125impl EditorElement {
126 pub fn new(style: EditorStyle) -> Self {
127 Self {
128 style: Arc::new(style),
129 }
130 }
131
132 fn attach_mouse_handlers(
133 scene: &mut SceneBuilder,
134 position_map: &Arc<PositionMap>,
135 has_popovers: bool,
136 visible_bounds: RectF,
137 text_bounds: RectF,
138 gutter_bounds: RectF,
139 bounds: RectF,
140 cx: &mut ViewContext<Editor>,
141 ) {
142 enum EditorElementMouseHandlers {}
143 scene.push_mouse_region(
144 MouseRegion::new::<EditorElementMouseHandlers>(
145 cx.view_id(),
146 cx.view_id(),
147 visible_bounds,
148 )
149 .on_down(MouseButton::Left, {
150 let position_map = position_map.clone();
151 move |event, editor, cx| {
152 if !Self::mouse_down(
153 editor,
154 event.platform_event,
155 position_map.as_ref(),
156 text_bounds,
157 gutter_bounds,
158 cx,
159 ) {
160 cx.propagate_event();
161 }
162 }
163 })
164 .on_down(MouseButton::Right, {
165 let position_map = position_map.clone();
166 move |event, editor, cx| {
167 if !Self::mouse_right_down(
168 editor,
169 event.position,
170 position_map.as_ref(),
171 text_bounds,
172 cx,
173 ) {
174 cx.propagate_event();
175 }
176 }
177 })
178 .on_up(MouseButton::Left, {
179 let position_map = position_map.clone();
180 move |event, editor, cx| {
181 if !Self::mouse_up(
182 editor,
183 event.position,
184 event.cmd,
185 event.shift,
186 event.alt,
187 position_map.as_ref(),
188 text_bounds,
189 cx,
190 ) {
191 cx.propagate_event()
192 }
193 }
194 })
195 .on_drag(MouseButton::Left, {
196 let position_map = position_map.clone();
197 move |event, editor, cx| {
198 if event.end {
199 return;
200 }
201
202 if !Self::mouse_dragged(
203 editor,
204 event.platform_event,
205 position_map.as_ref(),
206 text_bounds,
207 cx,
208 ) {
209 cx.propagate_event()
210 }
211 }
212 })
213 .on_move({
214 let position_map = position_map.clone();
215 move |event, editor, cx| {
216 if !Self::mouse_moved(
217 editor,
218 event.platform_event,
219 &position_map,
220 text_bounds,
221 cx,
222 ) {
223 cx.propagate_event()
224 }
225 }
226 })
227 .on_move_out(move |_, editor: &mut Editor, cx| {
228 if has_popovers {
229 hide_hover(editor, cx);
230 }
231 })
232 .on_scroll({
233 let position_map = position_map.clone();
234 move |event, editor, cx| {
235 if !Self::scroll(
236 editor,
237 event.position,
238 *event.delta.raw(),
239 event.delta.precise(),
240 &position_map,
241 bounds,
242 cx,
243 ) {
244 cx.propagate_event()
245 }
246 }
247 }),
248 );
249
250 enum GutterHandlers {}
251 scene.push_mouse_region(
252 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
253 .on_hover(|hover, editor: &mut Editor, cx| {
254 editor.gutter_hover(
255 &GutterHover {
256 hovered: hover.started,
257 },
258 cx,
259 );
260 }),
261 )
262 }
263
264 fn mouse_down(
265 editor: &mut Editor,
266 MouseButtonEvent {
267 position,
268 modifiers:
269 Modifiers {
270 shift,
271 ctrl,
272 alt,
273 cmd,
274 ..
275 },
276 mut click_count,
277 ..
278 }: MouseButtonEvent,
279 position_map: &PositionMap,
280 text_bounds: RectF,
281 gutter_bounds: RectF,
282 cx: &mut EventContext<Editor>,
283 ) -> bool {
284 if gutter_bounds.contains_point(position) {
285 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
286 } else if !text_bounds.contains_point(position) {
287 return false;
288 }
289
290 let (position, target_position) = position_map.point_for_position(text_bounds, position);
291
292 if shift && alt {
293 editor.select(
294 SelectPhase::BeginColumnar {
295 position,
296 goal_column: target_position.column(),
297 },
298 cx,
299 );
300 } else if shift && !ctrl && !alt && !cmd {
301 editor.select(
302 SelectPhase::Extend {
303 position,
304 click_count,
305 },
306 cx,
307 );
308 } else {
309 editor.select(
310 SelectPhase::Begin {
311 position,
312 add: alt,
313 click_count,
314 },
315 cx,
316 );
317 }
318
319 true
320 }
321
322 fn mouse_right_down(
323 editor: &mut Editor,
324 position: Vector2F,
325 position_map: &PositionMap,
326 text_bounds: RectF,
327 cx: &mut EventContext<Editor>,
328 ) -> bool {
329 if !text_bounds.contains_point(position) {
330 return false;
331 }
332
333 let (point, _) = position_map.point_for_position(text_bounds, position);
334 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
335 true
336 }
337
338 fn mouse_up(
339 editor: &mut Editor,
340 position: Vector2F,
341 cmd: bool,
342 shift: bool,
343 alt: bool,
344 position_map: &PositionMap,
345 text_bounds: RectF,
346 cx: &mut EventContext<Editor>,
347 ) -> bool {
348 let end_selection = editor.has_pending_selection();
349 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
350
351 if end_selection {
352 editor.select(SelectPhase::End, cx);
353 }
354
355 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
356 let (point, target_point) = position_map.point_for_position(text_bounds, position);
357
358 if point == target_point {
359 if shift {
360 go_to_fetched_type_definition(editor, point, alt, cx);
361 } else {
362 go_to_fetched_definition(editor, point, alt, cx);
363 }
364
365 return true;
366 }
367 }
368
369 end_selection
370 }
371
372 fn mouse_dragged(
373 editor: &mut Editor,
374 MouseMovedEvent {
375 modifiers: Modifiers { cmd, shift, .. },
376 position,
377 ..
378 }: MouseMovedEvent,
379 position_map: &PositionMap,
380 text_bounds: RectF,
381 cx: &mut EventContext<Editor>,
382 ) -> bool {
383 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
384 // Don't trigger hover popover if mouse is hovering over context menu
385 let point = if text_bounds.contains_point(position) {
386 let (point, target_point) = position_map.point_for_position(text_bounds, position);
387 if point == target_point {
388 Some(point)
389 } else {
390 None
391 }
392 } else {
393 None
394 };
395
396 update_go_to_definition_link(editor, point, cmd, shift, cx);
397
398 if editor.has_pending_selection() {
399 let mut scroll_delta = Vector2F::zero();
400
401 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
402 let top = text_bounds.origin_y() + vertical_margin;
403 let bottom = text_bounds.lower_left().y() - vertical_margin;
404 if position.y() < top {
405 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
406 }
407 if position.y() > bottom {
408 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
409 }
410
411 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
412 let left = text_bounds.origin_x() + horizontal_margin;
413 let right = text_bounds.upper_right().x() - horizontal_margin;
414 if position.x() < left {
415 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
416 left - position.x(),
417 ))
418 }
419 if position.x() > right {
420 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
421 position.x() - right,
422 ))
423 }
424
425 let (position, target_position) =
426 position_map.point_for_position(text_bounds, position);
427
428 editor.select(
429 SelectPhase::Update {
430 position,
431 goal_column: target_position.column(),
432 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
433 .clamp(Vector2F::zero(), position_map.scroll_max),
434 },
435 cx,
436 );
437 hover_at(editor, point, cx);
438 true
439 } else {
440 hover_at(editor, point, cx);
441 false
442 }
443 }
444
445 fn mouse_moved(
446 editor: &mut Editor,
447 MouseMovedEvent {
448 modifiers: Modifiers { shift, cmd, .. },
449 position,
450 ..
451 }: MouseMovedEvent,
452 position_map: &PositionMap,
453 text_bounds: RectF,
454 cx: &mut ViewContext<Editor>,
455 ) -> bool {
456 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
457 // Don't trigger hover popover if mouse is hovering over context menu
458 if text_bounds.contains_point(position) {
459 let (nearest_valid_position, unclipped_position) =
460 position_map.point_for_position(text_bounds, position);
461 if nearest_valid_position == unclipped_position {
462 update_go_to_definition_link(editor, Some(nearest_valid_position), cmd, shift, cx);
463 hover_at(editor, Some(nearest_valid_position), cx);
464 return true;
465 } else {
466 let buffer = editor.buffer().read(cx);
467 let snapshot = buffer.snapshot(cx);
468 let previous_valid_position = position_map
469 .snapshot
470 .clip_point(unclipped_position, Bias::Left)
471 .to_point(&position_map.snapshot.display_snapshot);
472 let previous_valid_anchor = snapshot.anchor_at(previous_valid_position, Bias::Left);
473 let next_valid_position = position_map
474 .snapshot
475 .clip_point(unclipped_position, Bias::Right)
476 .to_point(&position_map.snapshot.display_snapshot);
477 let next_valid_anchor = snapshot.anchor_at(next_valid_position, Bias::Right);
478 if let Some(hovered_hint) = editor
479 .visible_inlay_hints(cx)
480 .into_iter()
481 .skip_while(|hint| hint.position.cmp(&previous_valid_anchor, &snapshot).is_lt())
482 .take_while(|hint| hint.position.cmp(&next_valid_anchor, &snapshot).is_le())
483 .max_by_key(|hint| hint.id)
484 {
485 if let Some(cached_hint) = editor
486 .inlay_hint_cache()
487 .hint_by_id(previous_valid_anchor.excerpt_id, hovered_hint.id)
488 {
489 match &cached_hint.label {
490 project::InlayHintLabel::String(regular_label) => {
491 // TODO kb remove + check for tooltip for hover and resolve, if needed
492 eprintln!("regular string: {regular_label}");
493 }
494 project::InlayHintLabel::LabelParts(label_parts) => {
495 // TODO kb how to properly convert it?
496 let unclipped_inlay_position = InlayPoint::new(
497 unclipped_position.row(),
498 unclipped_position.column(),
499 );
500 if let Some(hovered_hint_part) = find_hovered_hint_part(
501 &position_map.snapshot,
502 &label_parts,
503 previous_valid_position,
504 next_valid_position,
505 unclipped_inlay_position,
506 ) {
507 // TODO kb remove + check for tooltip and location and resolve, if needed
508 eprintln!("hint_part: {hovered_hint_part:?}");
509 }
510 }
511 };
512 }
513 }
514 }
515 };
516
517 update_go_to_definition_link(editor, None, cmd, shift, cx);
518 hover_at(editor, None, cx);
519 true
520 }
521
522 fn scroll(
523 editor: &mut Editor,
524 position: Vector2F,
525 mut delta: Vector2F,
526 precise: bool,
527 position_map: &PositionMap,
528 bounds: RectF,
529 cx: &mut ViewContext<Editor>,
530 ) -> bool {
531 if !bounds.contains_point(position) {
532 return false;
533 }
534
535 let line_height = position_map.line_height;
536 let max_glyph_width = position_map.em_width;
537
538 let axis = if precise {
539 //Trackpad
540 position_map.snapshot.ongoing_scroll.filter(&mut delta)
541 } else {
542 //Not trackpad
543 delta *= vec2f(max_glyph_width, line_height);
544 None //Resets ongoing scroll
545 };
546
547 let scroll_position = position_map.snapshot.scroll_position();
548 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
549 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
550 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
551 editor.scroll(scroll_position, axis, cx);
552
553 true
554 }
555
556 fn paint_background(
557 &self,
558 scene: &mut SceneBuilder,
559 gutter_bounds: RectF,
560 text_bounds: RectF,
561 layout: &LayoutState,
562 ) {
563 let bounds = gutter_bounds.union_rect(text_bounds);
564 let scroll_top =
565 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
566 scene.push_quad(Quad {
567 bounds: gutter_bounds,
568 background: Some(self.style.gutter_background),
569 border: Border::new(0., Color::transparent_black()),
570 corner_radii: Default::default(),
571 });
572 scene.push_quad(Quad {
573 bounds: text_bounds,
574 background: Some(self.style.background),
575 border: Border::new(0., Color::transparent_black()),
576 corner_radii: Default::default(),
577 });
578
579 if let EditorMode::Full = layout.mode {
580 let mut active_rows = layout.active_rows.iter().peekable();
581 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
582 let mut end_row = *start_row;
583 while active_rows.peek().map_or(false, |r| {
584 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
585 }) {
586 active_rows.next().unwrap();
587 end_row += 1;
588 }
589
590 if !contains_non_empty_selection {
591 let origin = vec2f(
592 bounds.origin_x(),
593 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
594 - scroll_top,
595 );
596 let size = vec2f(
597 bounds.width(),
598 layout.position_map.line_height * (end_row - start_row + 1) as f32,
599 );
600 scene.push_quad(Quad {
601 bounds: RectF::new(origin, size),
602 background: Some(self.style.active_line_background),
603 border: Border::default(),
604 corner_radii: Default::default(),
605 });
606 }
607 }
608
609 if let Some(highlighted_rows) = &layout.highlighted_rows {
610 let origin = vec2f(
611 bounds.origin_x(),
612 bounds.origin_y()
613 + (layout.position_map.line_height * highlighted_rows.start as f32)
614 - scroll_top,
615 );
616 let size = vec2f(
617 bounds.width(),
618 layout.position_map.line_height * highlighted_rows.len() as f32,
619 );
620 scene.push_quad(Quad {
621 bounds: RectF::new(origin, size),
622 background: Some(self.style.highlighted_line_background),
623 border: Border::default(),
624 corner_radii: Default::default(),
625 });
626 }
627
628 let scroll_left =
629 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
630
631 for (wrap_position, active) in layout.wrap_guides.iter() {
632 let x =
633 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
634 - scroll_left;
635
636 if x < text_bounds.origin_x()
637 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
638 {
639 continue;
640 }
641
642 let color = if *active {
643 self.style.active_wrap_guide
644 } else {
645 self.style.wrap_guide
646 };
647 scene.push_quad(Quad {
648 bounds: RectF::new(
649 vec2f(x, text_bounds.origin_y()),
650 vec2f(1., text_bounds.height()),
651 ),
652 background: Some(color),
653 border: Border::new(0., Color::transparent_black()),
654 corner_radii: Default::default(),
655 });
656 }
657 }
658 }
659
660 fn paint_gutter(
661 &mut self,
662 scene: &mut SceneBuilder,
663 bounds: RectF,
664 visible_bounds: RectF,
665 layout: &mut LayoutState,
666 editor: &mut Editor,
667 cx: &mut PaintContext<Editor>,
668 ) {
669 let line_height = layout.position_map.line_height;
670
671 let scroll_position = layout.position_map.snapshot.scroll_position();
672 let scroll_top = scroll_position.y() * line_height;
673
674 let show_gutter = matches!(
675 settings::get::<ProjectSettings>(cx).git.git_gutter,
676 Some(GitGutterSetting::TrackedFiles)
677 );
678
679 if show_gutter {
680 Self::paint_diff_hunks(scene, bounds, layout, cx);
681 }
682
683 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
684 if let Some(line) = line {
685 let line_origin = bounds.origin()
686 + vec2f(
687 bounds.width() - line.width() - layout.gutter_padding,
688 ix as f32 * line_height - (scroll_top % line_height),
689 );
690
691 line.paint(scene, line_origin, visible_bounds, line_height, cx);
692 }
693 }
694
695 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
696 if let Some(indicator) = fold_indicator.as_mut() {
697 let position = vec2f(
698 bounds.width() - layout.gutter_padding,
699 ix as f32 * line_height - (scroll_top % line_height),
700 );
701 let centering_offset = vec2f(
702 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
703 (line_height - indicator.size().y()) / 2.,
704 );
705
706 let indicator_origin = bounds.origin() + position + centering_offset;
707
708 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
709 }
710 }
711
712 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
713 let mut x = 0.;
714 let mut y = *row as f32 * line_height - scroll_top;
715 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
716 y += (line_height - indicator.size().y()) / 2.;
717 indicator.paint(
718 scene,
719 bounds.origin() + vec2f(x, y),
720 visible_bounds,
721 editor,
722 cx,
723 );
724 }
725 }
726
727 fn paint_diff_hunks(
728 scene: &mut SceneBuilder,
729 bounds: RectF,
730 layout: &mut LayoutState,
731 cx: &mut ViewContext<Editor>,
732 ) {
733 let diff_style = &theme::current(cx).editor.diff.clone();
734 let line_height = layout.position_map.line_height;
735
736 let scroll_position = layout.position_map.snapshot.scroll_position();
737 let scroll_top = scroll_position.y() * line_height;
738
739 for hunk in &layout.display_hunks {
740 let (display_row_range, status) = match hunk {
741 //TODO: This rendering is entirely a horrible hack
742 &DisplayDiffHunk::Folded { display_row: row } => {
743 let start_y = row as f32 * line_height - scroll_top;
744 let end_y = start_y + line_height;
745
746 let width = diff_style.removed_width_em * line_height;
747 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
748 let highlight_size = vec2f(width * 2., end_y - start_y);
749 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
750
751 scene.push_quad(Quad {
752 bounds: highlight_bounds,
753 background: Some(diff_style.modified),
754 border: Border::new(0., Color::transparent_black()),
755 corner_radii: (1. * line_height).into(),
756 });
757
758 continue;
759 }
760
761 DisplayDiffHunk::Unfolded {
762 display_row_range,
763 status,
764 } => (display_row_range, status),
765 };
766
767 let color = match status {
768 DiffHunkStatus::Added => diff_style.inserted,
769 DiffHunkStatus::Modified => diff_style.modified,
770
771 //TODO: This rendering is entirely a horrible hack
772 DiffHunkStatus::Removed => {
773 let row = display_row_range.start;
774
775 let offset = line_height / 2.;
776 let start_y = row as f32 * line_height - offset - scroll_top;
777 let end_y = start_y + line_height;
778
779 let width = diff_style.removed_width_em * line_height;
780 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
781 let highlight_size = vec2f(width * 2., end_y - start_y);
782 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
783
784 scene.push_quad(Quad {
785 bounds: highlight_bounds,
786 background: Some(diff_style.deleted),
787 border: Border::new(0., Color::transparent_black()),
788 corner_radii: (1. * line_height).into(),
789 });
790
791 continue;
792 }
793 };
794
795 let start_row = display_row_range.start;
796 let end_row = display_row_range.end;
797
798 let start_y = start_row as f32 * line_height - scroll_top;
799 let end_y = end_row as f32 * line_height - scroll_top;
800
801 let width = diff_style.width_em * line_height;
802 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
803 let highlight_size = vec2f(width * 2., end_y - start_y);
804 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
805
806 scene.push_quad(Quad {
807 bounds: highlight_bounds,
808 background: Some(color),
809 border: Border::new(0., Color::transparent_black()),
810 corner_radii: (diff_style.corner_radius * line_height).into(),
811 });
812 }
813 }
814
815 fn paint_text(
816 &mut self,
817 scene: &mut SceneBuilder,
818 bounds: RectF,
819 visible_bounds: RectF,
820 layout: &mut LayoutState,
821 editor: &mut Editor,
822 cx: &mut PaintContext<Editor>,
823 ) {
824 let style = &self.style;
825 let scroll_position = layout.position_map.snapshot.scroll_position();
826 let start_row = layout.visible_display_row_range.start;
827 let scroll_top = scroll_position.y() * layout.position_map.line_height;
828 let max_glyph_width = layout.position_map.em_width;
829 let scroll_left = scroll_position.x() * max_glyph_width;
830 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
831 let line_end_overshoot = 0.15 * layout.position_map.line_height;
832 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
833
834 scene.push_layer(Some(bounds));
835
836 scene.push_cursor_region(CursorRegion {
837 bounds,
838 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
839 CursorStyle::PointingHand
840 } else {
841 CursorStyle::IBeam
842 },
843 });
844
845 let fold_corner_radius =
846 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
847 for (id, range, color) in layout.fold_ranges.iter() {
848 self.paint_highlighted_range(
849 scene,
850 range.clone(),
851 *color,
852 fold_corner_radius,
853 fold_corner_radius * 2.,
854 layout,
855 content_origin,
856 scroll_top,
857 scroll_left,
858 bounds,
859 );
860
861 for bound in range_to_bounds(
862 &range,
863 content_origin,
864 scroll_left,
865 scroll_top,
866 &layout.visible_display_row_range,
867 line_end_overshoot,
868 &layout.position_map,
869 ) {
870 scene.push_cursor_region(CursorRegion {
871 bounds: bound,
872 style: CursorStyle::PointingHand,
873 });
874
875 let display_row = range.start.row();
876
877 let buffer_row = DisplayPoint::new(display_row, 0)
878 .to_point(&layout.position_map.snapshot.display_snapshot)
879 .row;
880
881 scene.push_mouse_region(
882 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
883 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
884 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
885 })
886 .with_notify_on_hover(true)
887 .with_notify_on_click(true),
888 )
889 }
890 }
891
892 for (range, color) in &layout.highlighted_ranges {
893 self.paint_highlighted_range(
894 scene,
895 range.clone(),
896 *color,
897 0.,
898 line_end_overshoot,
899 layout,
900 content_origin,
901 scroll_top,
902 scroll_left,
903 bounds,
904 );
905 }
906
907 let mut cursors = SmallVec::<[Cursor; 32]>::new();
908 let corner_radius = 0.15 * layout.position_map.line_height;
909 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
910
911 for (replica_id, selections) in &layout.selections {
912 let replica_id = *replica_id;
913 let selection_style = if let Some(replica_id) = replica_id {
914 style.replica_selection_style(replica_id)
915 } else {
916 &style.absent_selection
917 };
918
919 for selection in selections {
920 self.paint_highlighted_range(
921 scene,
922 selection.range.clone(),
923 selection_style.selection,
924 corner_radius,
925 corner_radius * 2.,
926 layout,
927 content_origin,
928 scroll_top,
929 scroll_left,
930 bounds,
931 );
932
933 if selection.is_local && !selection.range.is_empty() {
934 invisible_display_ranges.push(selection.range.clone());
935 }
936 if !selection.is_local || editor.show_local_cursors(cx) {
937 let cursor_position = selection.head;
938 if layout
939 .visible_display_row_range
940 .contains(&cursor_position.row())
941 {
942 let cursor_row_layout = &layout.position_map.line_layouts
943 [(cursor_position.row() - start_row) as usize]
944 .line;
945 let cursor_column = cursor_position.column() as usize;
946
947 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
948 let mut block_width =
949 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
950 if block_width == 0.0 {
951 block_width = layout.position_map.em_width;
952 }
953 let block_text = if let CursorShape::Block = selection.cursor_shape {
954 layout
955 .position_map
956 .snapshot
957 .chars_at(cursor_position)
958 .next()
959 .and_then(|(character, _)| {
960 let font_id =
961 cursor_row_layout.font_for_index(cursor_column)?;
962 let text = character.to_string();
963
964 Some(cx.text_layout_cache().layout_str(
965 &text,
966 cursor_row_layout.font_size(),
967 &[(
968 text.chars().count(),
969 RunStyle {
970 font_id,
971 color: style.background,
972 underline: Default::default(),
973 },
974 )],
975 ))
976 })
977 } else {
978 None
979 };
980
981 let x = cursor_character_x - scroll_left;
982 let y = cursor_position.row() as f32 * layout.position_map.line_height
983 - scroll_top;
984 if selection.is_newest {
985 editor.pixel_position_of_newest_cursor = Some(vec2f(
986 bounds.origin_x() + x + block_width / 2.,
987 bounds.origin_y() + y + layout.position_map.line_height / 2.,
988 ));
989 }
990 cursors.push(Cursor {
991 color: selection_style.cursor,
992 block_width,
993 origin: vec2f(x, y),
994 line_height: layout.position_map.line_height,
995 shape: selection.cursor_shape,
996 block_text,
997 });
998 }
999 }
1000 }
1001 }
1002
1003 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
1004 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
1005 let row = start_row + ix as u32;
1006 line_with_invisibles.draw(
1007 layout,
1008 row,
1009 scroll_top,
1010 scene,
1011 content_origin,
1012 scroll_left,
1013 visible_text_bounds,
1014 whitespace_setting,
1015 &invisible_display_ranges,
1016 visible_bounds,
1017 cx,
1018 )
1019 }
1020 }
1021
1022 scene.paint_layer(Some(bounds), |scene| {
1023 for cursor in cursors {
1024 cursor.paint(scene, content_origin, cx);
1025 }
1026 });
1027
1028 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
1029 scene.push_stacking_context(None, None);
1030 let cursor_row_layout =
1031 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1032 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
1033 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
1034 let mut list_origin = content_origin + vec2f(x, y);
1035 let list_width = context_menu.size().x();
1036 let list_height = context_menu.size().y();
1037
1038 // Snap the right edge of the list to the right edge of the window if
1039 // its horizontal bounds overflow.
1040 if list_origin.x() + list_width > cx.window_size().x() {
1041 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
1042 }
1043
1044 if list_origin.y() + list_height > bounds.max_y() {
1045 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
1046 }
1047
1048 context_menu.paint(
1049 scene,
1050 list_origin,
1051 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1052 editor,
1053 cx,
1054 );
1055
1056 scene.pop_stacking_context();
1057 }
1058
1059 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
1060 scene.push_stacking_context(None, None);
1061
1062 // This is safe because we check on layout whether the required row is available
1063 let hovered_row_layout =
1064 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1065
1066 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1067 // height. This is the size we will use to decide whether to render popovers above or below
1068 // the hovered line.
1069 let first_size = hover_popovers[0].size();
1070 let height_to_reserve = first_size.y()
1071 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1072
1073 // Compute Hovered Point
1074 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1075 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1076 let hovered_point = content_origin + vec2f(x, y);
1077
1078 if hovered_point.y() - height_to_reserve > 0.0 {
1079 // There is enough space above. Render popovers above the hovered point
1080 let mut current_y = hovered_point.y();
1081 for hover_popover in hover_popovers {
1082 let size = hover_popover.size();
1083 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1084
1085 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1086 if x_out_of_bounds < 0.0 {
1087 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1088 }
1089
1090 hover_popover.paint(
1091 scene,
1092 popover_origin,
1093 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1094 editor,
1095 cx,
1096 );
1097
1098 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1099 }
1100 } else {
1101 // There is not enough space above. Render popovers below the hovered point
1102 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1103 for hover_popover in hover_popovers {
1104 let size = hover_popover.size();
1105 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1106
1107 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1108 if x_out_of_bounds < 0.0 {
1109 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1110 }
1111
1112 hover_popover.paint(
1113 scene,
1114 popover_origin,
1115 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1116 editor,
1117 cx,
1118 );
1119
1120 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1121 }
1122 }
1123
1124 scene.pop_stacking_context();
1125 }
1126
1127 scene.pop_layer();
1128 }
1129
1130 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1131 bounds.max_x() - self.style.theme.scrollbar.width
1132 }
1133
1134 fn paint_scrollbar(
1135 &mut self,
1136 scene: &mut SceneBuilder,
1137 bounds: RectF,
1138 layout: &mut LayoutState,
1139 cx: &mut ViewContext<Editor>,
1140 editor: &Editor,
1141 ) {
1142 enum ScrollbarMouseHandlers {}
1143 if layout.mode != EditorMode::Full {
1144 return;
1145 }
1146
1147 let style = &self.style.theme.scrollbar;
1148
1149 let top = bounds.min_y();
1150 let bottom = bounds.max_y();
1151 let right = bounds.max_x();
1152 let left = self.scrollbar_left(&bounds);
1153 let row_range = &layout.scrollbar_row_range;
1154 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1155
1156 let mut height = bounds.height();
1157 let mut first_row_y_offset = 0.0;
1158
1159 // Impose a minimum height on the scrollbar thumb
1160 let row_height = height / max_row;
1161 let min_thumb_height =
1162 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1163 let thumb_height = (row_range.end - row_range.start) * row_height;
1164 if thumb_height < min_thumb_height {
1165 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1166 height -= min_thumb_height - thumb_height;
1167 }
1168
1169 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1170
1171 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1172 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1173 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1174 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1175
1176 if layout.show_scrollbars {
1177 scene.push_quad(Quad {
1178 bounds: track_bounds,
1179 border: style.track.border,
1180 background: style.track.background_color,
1181 ..Default::default()
1182 });
1183 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1184 let theme = theme::current(cx);
1185 let scrollbar_theme = &theme.editor.scrollbar;
1186 if layout.is_singleton && scrollbar_settings.selections {
1187 let start_anchor = Anchor::min();
1188 let end_anchor = Anchor::max();
1189 let color = scrollbar_theme.selections;
1190 let border = Border {
1191 width: 1.,
1192 color: style.thumb.border.color,
1193 overlay: false,
1194 top: false,
1195 right: true,
1196 bottom: false,
1197 left: true,
1198 };
1199 let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1200 let start_y = y_for_row(start.row() as f32);
1201 let mut end_y = y_for_row(end.row() as f32);
1202 if end_y - start_y < 1. {
1203 end_y = start_y + 1.;
1204 }
1205 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1206
1207 scene.push_quad(Quad {
1208 bounds,
1209 background: Some(color),
1210 border,
1211 corner_radii: style.thumb.corner_radii.into(),
1212 })
1213 };
1214 let background_ranges = editor
1215 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1216 start_anchor..end_anchor,
1217 &layout.position_map.snapshot,
1218 50000,
1219 );
1220 for row in background_ranges {
1221 let start = row.start();
1222 let end = row.end();
1223 push_region(*start, *end);
1224 }
1225 }
1226
1227 if layout.is_singleton && scrollbar_settings.git_diff {
1228 let diff_style = scrollbar_theme.git.clone();
1229 for hunk in layout
1230 .position_map
1231 .snapshot
1232 .buffer_snapshot
1233 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1234 {
1235 let start_display = Point::new(hunk.buffer_range.start, 0)
1236 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1237 let end_display = Point::new(hunk.buffer_range.end, 0)
1238 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1239 let start_y = y_for_row(start_display.row() as f32);
1240 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1241 y_for_row((end_display.row() + 1) as f32)
1242 } else {
1243 y_for_row((end_display.row()) as f32)
1244 };
1245
1246 if end_y - start_y < 1. {
1247 end_y = start_y + 1.;
1248 }
1249 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1250
1251 let color = match hunk.status() {
1252 DiffHunkStatus::Added => diff_style.inserted,
1253 DiffHunkStatus::Modified => diff_style.modified,
1254 DiffHunkStatus::Removed => diff_style.deleted,
1255 };
1256
1257 let border = Border {
1258 width: 1.,
1259 color: style.thumb.border.color,
1260 overlay: false,
1261 top: false,
1262 right: true,
1263 bottom: false,
1264 left: true,
1265 };
1266
1267 scene.push_quad(Quad {
1268 bounds,
1269 background: Some(color),
1270 border,
1271 corner_radii: style.thumb.corner_radii.into(),
1272 })
1273 }
1274 }
1275
1276 scene.push_quad(Quad {
1277 bounds: thumb_bounds,
1278 border: style.thumb.border,
1279 background: style.thumb.background_color,
1280 corner_radii: style.thumb.corner_radii.into(),
1281 });
1282 }
1283
1284 scene.push_cursor_region(CursorRegion {
1285 bounds: track_bounds,
1286 style: CursorStyle::Arrow,
1287 });
1288 scene.push_mouse_region(
1289 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1290 .on_move(move |event, editor: &mut Editor, cx| {
1291 if event.pressed_button.is_none() {
1292 editor.scroll_manager.show_scrollbar(cx);
1293 }
1294 })
1295 .on_down(MouseButton::Left, {
1296 let row_range = row_range.clone();
1297 move |event, editor: &mut Editor, cx| {
1298 let y = event.position.y();
1299 if y < thumb_top || thumb_bottom < y {
1300 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1301 let top_row = center_row
1302 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1303 let mut position = editor.scroll_position(cx);
1304 position.set_y(top_row as f32);
1305 editor.set_scroll_position(position, cx);
1306 } else {
1307 editor.scroll_manager.show_scrollbar(cx);
1308 }
1309 }
1310 })
1311 .on_drag(MouseButton::Left, {
1312 move |event, editor: &mut Editor, cx| {
1313 if event.end {
1314 return;
1315 }
1316
1317 let y = event.prev_mouse_position.y();
1318 let new_y = event.position.y();
1319 if thumb_top < y && y < thumb_bottom {
1320 let mut position = editor.scroll_position(cx);
1321 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1322 if position.y() < 0.0 {
1323 position.set_y(0.);
1324 }
1325 editor.set_scroll_position(position, cx);
1326 }
1327 }
1328 }),
1329 );
1330 }
1331
1332 #[allow(clippy::too_many_arguments)]
1333 fn paint_highlighted_range(
1334 &self,
1335 scene: &mut SceneBuilder,
1336 range: Range<DisplayPoint>,
1337 color: Color,
1338 corner_radius: f32,
1339 line_end_overshoot: f32,
1340 layout: &LayoutState,
1341 content_origin: Vector2F,
1342 scroll_top: f32,
1343 scroll_left: f32,
1344 bounds: RectF,
1345 ) {
1346 let start_row = layout.visible_display_row_range.start;
1347 let end_row = layout.visible_display_row_range.end;
1348 if range.start != range.end {
1349 let row_range = if range.end.column() == 0 {
1350 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1351 } else {
1352 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1353 };
1354
1355 let highlighted_range = HighlightedRange {
1356 color,
1357 line_height: layout.position_map.line_height,
1358 corner_radius,
1359 start_y: content_origin.y()
1360 + row_range.start as f32 * layout.position_map.line_height
1361 - scroll_top,
1362 lines: row_range
1363 .into_iter()
1364 .map(|row| {
1365 let line_layout =
1366 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1367 HighlightedRangeLine {
1368 start_x: if row == range.start.row() {
1369 content_origin.x()
1370 + line_layout.x_for_index(range.start.column() as usize)
1371 - scroll_left
1372 } else {
1373 content_origin.x() - scroll_left
1374 },
1375 end_x: if row == range.end.row() {
1376 content_origin.x()
1377 + line_layout.x_for_index(range.end.column() as usize)
1378 - scroll_left
1379 } else {
1380 content_origin.x() + line_layout.width() + line_end_overshoot
1381 - scroll_left
1382 },
1383 }
1384 })
1385 .collect(),
1386 };
1387
1388 highlighted_range.paint(bounds, scene);
1389 }
1390 }
1391
1392 fn paint_blocks(
1393 &mut self,
1394 scene: &mut SceneBuilder,
1395 bounds: RectF,
1396 visible_bounds: RectF,
1397 layout: &mut LayoutState,
1398 editor: &mut Editor,
1399 cx: &mut PaintContext<Editor>,
1400 ) {
1401 let scroll_position = layout.position_map.snapshot.scroll_position();
1402 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1403 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1404
1405 for block in &mut layout.blocks {
1406 let mut origin = bounds.origin()
1407 + vec2f(
1408 0.,
1409 block.row as f32 * layout.position_map.line_height - scroll_top,
1410 );
1411 if !matches!(block.style, BlockStyle::Sticky) {
1412 origin += vec2f(-scroll_left, 0.);
1413 }
1414 block
1415 .element
1416 .paint(scene, origin, visible_bounds, editor, cx);
1417 }
1418 }
1419
1420 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1421 let style = &self.style;
1422
1423 cx.text_layout_cache()
1424 .layout_str(
1425 " ".repeat(column).as_str(),
1426 style.text.font_size,
1427 &[(
1428 column,
1429 RunStyle {
1430 font_id: style.text.font_id,
1431 color: Color::black(),
1432 underline: Default::default(),
1433 },
1434 )],
1435 )
1436 .width()
1437 }
1438
1439 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1440 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1441 self.column_pixels(digit_count, cx)
1442 }
1443
1444 //Folds contained in a hunk are ignored apart from shrinking visual size
1445 //If a fold contains any hunks then that fold line is marked as modified
1446 fn layout_git_gutters(
1447 &self,
1448 display_rows: Range<u32>,
1449 snapshot: &EditorSnapshot,
1450 ) -> Vec<DisplayDiffHunk> {
1451 let buffer_snapshot = &snapshot.buffer_snapshot;
1452
1453 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1454 .to_point(snapshot)
1455 .row;
1456 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1457 .to_point(snapshot)
1458 .row;
1459
1460 buffer_snapshot
1461 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1462 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1463 .dedup()
1464 .collect()
1465 }
1466
1467 fn layout_line_numbers(
1468 &self,
1469 rows: Range<u32>,
1470 active_rows: &BTreeMap<u32, bool>,
1471 is_singleton: bool,
1472 snapshot: &EditorSnapshot,
1473 cx: &ViewContext<Editor>,
1474 ) -> (
1475 Vec<Option<text_layout::Line>>,
1476 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1477 ) {
1478 let style = &self.style;
1479 let include_line_numbers = snapshot.mode == EditorMode::Full;
1480 let mut line_number_layouts = Vec::with_capacity(rows.len());
1481 let mut fold_statuses = Vec::with_capacity(rows.len());
1482 let mut line_number = String::new();
1483 for (ix, row) in snapshot
1484 .buffer_rows(rows.start)
1485 .take((rows.end - rows.start) as usize)
1486 .enumerate()
1487 {
1488 let display_row = rows.start + ix as u32;
1489 let (active, color) = if active_rows.contains_key(&display_row) {
1490 (true, style.line_number_active)
1491 } else {
1492 (false, style.line_number)
1493 };
1494 if let Some(buffer_row) = row {
1495 if include_line_numbers {
1496 line_number.clear();
1497 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1498 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1499 &line_number,
1500 style.text.font_size,
1501 &[(
1502 line_number.len(),
1503 RunStyle {
1504 font_id: style.text.font_id,
1505 color,
1506 underline: Default::default(),
1507 },
1508 )],
1509 )));
1510 fold_statuses.push(
1511 is_singleton
1512 .then(|| {
1513 snapshot
1514 .fold_for_line(buffer_row)
1515 .map(|fold_status| (fold_status, buffer_row, active))
1516 })
1517 .flatten(),
1518 )
1519 }
1520 } else {
1521 fold_statuses.push(None);
1522 line_number_layouts.push(None);
1523 }
1524 }
1525
1526 (line_number_layouts, fold_statuses)
1527 }
1528
1529 fn layout_lines(
1530 &mut self,
1531 rows: Range<u32>,
1532 line_number_layouts: &[Option<Line>],
1533 snapshot: &EditorSnapshot,
1534 cx: &ViewContext<Editor>,
1535 ) -> Vec<LineWithInvisibles> {
1536 if rows.start >= rows.end {
1537 return Vec::new();
1538 }
1539
1540 // When the editor is empty and unfocused, then show the placeholder.
1541 if snapshot.is_empty() {
1542 let placeholder_style = self
1543 .style
1544 .placeholder_text
1545 .as_ref()
1546 .unwrap_or(&self.style.text);
1547 let placeholder_text = snapshot.placeholder_text();
1548 let placeholder_lines = placeholder_text
1549 .as_ref()
1550 .map_or("", AsRef::as_ref)
1551 .split('\n')
1552 .skip(rows.start as usize)
1553 .chain(iter::repeat(""))
1554 .take(rows.len());
1555 placeholder_lines
1556 .map(|line| {
1557 cx.text_layout_cache().layout_str(
1558 line,
1559 placeholder_style.font_size,
1560 &[(
1561 line.len(),
1562 RunStyle {
1563 font_id: placeholder_style.font_id,
1564 color: placeholder_style.color,
1565 underline: Default::default(),
1566 },
1567 )],
1568 )
1569 })
1570 .map(|line| LineWithInvisibles {
1571 line,
1572 invisibles: Vec::new(),
1573 })
1574 .collect()
1575 } else {
1576 let style = &self.style;
1577 let chunks = snapshot
1578 .chunks(
1579 rows.clone(),
1580 true,
1581 Some(style.theme.hint),
1582 Some(style.theme.suggestion),
1583 )
1584 .map(|chunk| {
1585 let mut highlight_style = chunk
1586 .syntax_highlight_id
1587 .and_then(|id| id.style(&style.syntax));
1588
1589 if let Some(chunk_highlight) = chunk.highlight_style {
1590 if let Some(highlight_style) = highlight_style.as_mut() {
1591 highlight_style.highlight(chunk_highlight);
1592 } else {
1593 highlight_style = Some(chunk_highlight);
1594 }
1595 }
1596
1597 let mut diagnostic_highlight = HighlightStyle::default();
1598
1599 if chunk.is_unnecessary {
1600 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1601 }
1602
1603 if let Some(severity) = chunk.diagnostic_severity {
1604 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1605 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1606 let diagnostic_style = super::diagnostic_style(severity, true, style);
1607 diagnostic_highlight.underline = Some(Underline {
1608 color: Some(diagnostic_style.message.text.color),
1609 thickness: 1.0.into(),
1610 squiggly: true,
1611 });
1612 }
1613 }
1614
1615 if let Some(highlight_style) = highlight_style.as_mut() {
1616 highlight_style.highlight(diagnostic_highlight);
1617 } else {
1618 highlight_style = Some(diagnostic_highlight);
1619 }
1620
1621 HighlightedChunk {
1622 chunk: chunk.text,
1623 style: highlight_style,
1624 is_tab: chunk.is_tab,
1625 }
1626 });
1627
1628 LineWithInvisibles::from_chunks(
1629 chunks,
1630 &style.text,
1631 cx.text_layout_cache(),
1632 cx.font_cache(),
1633 MAX_LINE_LEN,
1634 rows.len() as usize,
1635 line_number_layouts,
1636 snapshot.mode,
1637 )
1638 }
1639 }
1640
1641 #[allow(clippy::too_many_arguments)]
1642 fn layout_blocks(
1643 &mut self,
1644 rows: Range<u32>,
1645 snapshot: &EditorSnapshot,
1646 editor_width: f32,
1647 scroll_width: f32,
1648 gutter_padding: f32,
1649 gutter_width: f32,
1650 em_width: f32,
1651 text_x: f32,
1652 line_height: f32,
1653 style: &EditorStyle,
1654 line_layouts: &[LineWithInvisibles],
1655 editor: &mut Editor,
1656 cx: &mut LayoutContext<Editor>,
1657 ) -> (f32, Vec<BlockLayout>) {
1658 let mut block_id = 0;
1659 let scroll_x = snapshot.scroll_anchor.offset.x();
1660 let (fixed_blocks, non_fixed_blocks) = snapshot
1661 .blocks_in_range(rows.clone())
1662 .partition::<Vec<_>, _>(|(_, block)| match block {
1663 TransformBlock::ExcerptHeader { .. } => false,
1664 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1665 });
1666 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1667 let mut element = match block {
1668 TransformBlock::Custom(block) => {
1669 let align_to = block
1670 .position()
1671 .to_point(&snapshot.buffer_snapshot)
1672 .to_display_point(snapshot);
1673 let anchor_x = text_x
1674 + if rows.contains(&align_to.row()) {
1675 line_layouts[(align_to.row() - rows.start) as usize]
1676 .line
1677 .x_for_index(align_to.column() as usize)
1678 } else {
1679 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1680 .x_for_index(align_to.column() as usize)
1681 };
1682
1683 block.render(&mut BlockContext {
1684 view_context: cx,
1685 anchor_x,
1686 gutter_padding,
1687 line_height,
1688 scroll_x,
1689 gutter_width,
1690 em_width,
1691 block_id,
1692 })
1693 }
1694 TransformBlock::ExcerptHeader {
1695 id,
1696 buffer,
1697 range,
1698 starts_new_buffer,
1699 ..
1700 } => {
1701 let tooltip_style = theme::current(cx).tooltip.clone();
1702 let include_root = editor
1703 .project
1704 .as_ref()
1705 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1706 .unwrap_or_default();
1707 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1708 let jump_path = ProjectPath {
1709 worktree_id: file.worktree_id(cx),
1710 path: file.path.clone(),
1711 };
1712 let jump_anchor = range
1713 .primary
1714 .as_ref()
1715 .map_or(range.context.start, |primary| primary.start);
1716 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1717
1718 enum JumpIcon {}
1719 MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
1720 let style = style.jump_icon.style_for(state);
1721 Svg::new("icons/arrow_up_right_8.svg")
1722 .with_color(style.color)
1723 .constrained()
1724 .with_width(style.icon_width)
1725 .aligned()
1726 .contained()
1727 .with_style(style.container)
1728 .constrained()
1729 .with_width(style.button_width)
1730 .with_height(style.button_width)
1731 })
1732 .with_cursor_style(CursorStyle::PointingHand)
1733 .on_click(MouseButton::Left, move |_, editor, cx| {
1734 if let Some(workspace) = editor
1735 .workspace
1736 .as_ref()
1737 .and_then(|(workspace, _)| workspace.upgrade(cx))
1738 {
1739 workspace.update(cx, |workspace, cx| {
1740 Editor::jump(
1741 workspace,
1742 jump_path.clone(),
1743 jump_position,
1744 jump_anchor,
1745 cx,
1746 );
1747 });
1748 }
1749 })
1750 .with_tooltip::<JumpIcon>(
1751 (*id).into(),
1752 "Jump to Buffer".to_string(),
1753 Some(Box::new(crate::OpenExcerpts)),
1754 tooltip_style.clone(),
1755 cx,
1756 )
1757 .aligned()
1758 .flex_float()
1759 });
1760
1761 if *starts_new_buffer {
1762 let editor_font_size = style.text.font_size;
1763 let style = &style.diagnostic_path_header;
1764 let font_size = (style.text_scale_factor * editor_font_size).round();
1765
1766 let path = buffer.resolve_file_path(cx, include_root);
1767 let mut filename = None;
1768 let mut parent_path = None;
1769 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1770 if let Some(path) = path {
1771 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1772 parent_path =
1773 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1774 }
1775
1776 Flex::row()
1777 .with_child(
1778 Label::new(
1779 filename.unwrap_or_else(|| "untitled".to_string()),
1780 style.filename.text.clone().with_font_size(font_size),
1781 )
1782 .contained()
1783 .with_style(style.filename.container)
1784 .aligned(),
1785 )
1786 .with_children(parent_path.map(|path| {
1787 Label::new(path, style.path.text.clone().with_font_size(font_size))
1788 .contained()
1789 .with_style(style.path.container)
1790 .aligned()
1791 }))
1792 .with_children(jump_icon)
1793 .contained()
1794 .with_style(style.container)
1795 .with_padding_left(gutter_padding)
1796 .with_padding_right(gutter_padding)
1797 .expanded()
1798 .into_any_named("path header block")
1799 } else {
1800 let text_style = style.text.clone();
1801 Flex::row()
1802 .with_child(Label::new("⋯", text_style))
1803 .with_children(jump_icon)
1804 .contained()
1805 .with_padding_left(gutter_padding)
1806 .with_padding_right(gutter_padding)
1807 .expanded()
1808 .into_any_named("collapsed context")
1809 }
1810 }
1811 };
1812
1813 element.layout(
1814 SizeConstraint {
1815 min: Vector2F::zero(),
1816 max: vec2f(width, block.height() as f32 * line_height),
1817 },
1818 editor,
1819 cx,
1820 );
1821 element
1822 };
1823
1824 let mut fixed_block_max_width = 0f32;
1825 let mut blocks = Vec::new();
1826 for (row, block) in fixed_blocks {
1827 let element = render_block(block, f32::INFINITY, block_id);
1828 block_id += 1;
1829 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1830 blocks.push(BlockLayout {
1831 row,
1832 element,
1833 style: BlockStyle::Fixed,
1834 });
1835 }
1836 for (row, block) in non_fixed_blocks {
1837 let style = match block {
1838 TransformBlock::Custom(block) => block.style(),
1839 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1840 };
1841 let width = match style {
1842 BlockStyle::Sticky => editor_width,
1843 BlockStyle::Flex => editor_width
1844 .max(fixed_block_max_width)
1845 .max(gutter_width + scroll_width),
1846 BlockStyle::Fixed => unreachable!(),
1847 };
1848 let element = render_block(block, width, block_id);
1849 block_id += 1;
1850 blocks.push(BlockLayout {
1851 row,
1852 element,
1853 style,
1854 });
1855 }
1856 (
1857 scroll_width.max(fixed_block_max_width - gutter_width),
1858 blocks,
1859 )
1860 }
1861}
1862
1863fn find_hovered_hint_part<'a>(
1864 snapshot: &EditorSnapshot,
1865 label_parts: &'a [InlayHintLabelPart],
1866 hint_start: Point,
1867 hint_end: Point,
1868 hovered_position: InlayPoint,
1869) -> Option<&'a InlayHintLabelPart> {
1870 let hint_start_offset =
1871 snapshot.display_point_to_inlay_offset(hint_start.to_display_point(&snapshot), Bias::Left);
1872 let hint_end_offset =
1873 snapshot.display_point_to_inlay_offset(hint_end.to_display_point(&snapshot), Bias::Right);
1874 dbg!((
1875 "~~~~~~~~~",
1876 hint_start,
1877 hint_start_offset,
1878 hint_end,
1879 hint_end_offset,
1880 hovered_position
1881 ));
1882 let hovered_offset = snapshot.inlay_point_to_inlay_offset(hovered_position);
1883 if hovered_offset >= hint_start_offset && hovered_offset <= hint_end_offset {
1884 let mut hovered_character = (hovered_offset - hint_start_offset).0;
1885 for part in label_parts {
1886 let part_len = part.value.chars().count();
1887 if hovered_character >= part_len {
1888 hovered_character -= part_len;
1889 } else {
1890 return Some(part);
1891 }
1892 }
1893 }
1894 None
1895}
1896
1897struct HighlightedChunk<'a> {
1898 chunk: &'a str,
1899 style: Option<HighlightStyle>,
1900 is_tab: bool,
1901}
1902
1903#[derive(Debug)]
1904pub struct LineWithInvisibles {
1905 pub line: Line,
1906 invisibles: Vec<Invisible>,
1907}
1908
1909impl LineWithInvisibles {
1910 fn from_chunks<'a>(
1911 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1912 text_style: &TextStyle,
1913 text_layout_cache: &TextLayoutCache,
1914 font_cache: &Arc<FontCache>,
1915 max_line_len: usize,
1916 max_line_count: usize,
1917 line_number_layouts: &[Option<Line>],
1918 editor_mode: EditorMode,
1919 ) -> Vec<Self> {
1920 let mut layouts = Vec::with_capacity(max_line_count);
1921 let mut line = String::new();
1922 let mut invisibles = Vec::new();
1923 let mut styles = Vec::new();
1924 let mut non_whitespace_added = false;
1925 let mut row = 0;
1926 let mut line_exceeded_max_len = false;
1927 for highlighted_chunk in chunks.chain([HighlightedChunk {
1928 chunk: "\n",
1929 style: None,
1930 is_tab: false,
1931 }]) {
1932 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1933 if ix > 0 {
1934 layouts.push(Self {
1935 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1936 invisibles: invisibles.drain(..).collect(),
1937 });
1938
1939 line.clear();
1940 styles.clear();
1941 row += 1;
1942 line_exceeded_max_len = false;
1943 non_whitespace_added = false;
1944 if row == max_line_count {
1945 return layouts;
1946 }
1947 }
1948
1949 if !line_chunk.is_empty() && !line_exceeded_max_len {
1950 let text_style = if let Some(style) = highlighted_chunk.style {
1951 text_style
1952 .clone()
1953 .highlight(style, font_cache)
1954 .map(Cow::Owned)
1955 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1956 } else {
1957 Cow::Borrowed(text_style)
1958 };
1959
1960 if line.len() + line_chunk.len() > max_line_len {
1961 let mut chunk_len = max_line_len - line.len();
1962 while !line_chunk.is_char_boundary(chunk_len) {
1963 chunk_len -= 1;
1964 }
1965 line_chunk = &line_chunk[..chunk_len];
1966 line_exceeded_max_len = true;
1967 }
1968
1969 styles.push((
1970 line_chunk.len(),
1971 RunStyle {
1972 font_id: text_style.font_id,
1973 color: text_style.color,
1974 underline: text_style.underline,
1975 },
1976 ));
1977
1978 if editor_mode == EditorMode::Full {
1979 // Line wrap pads its contents with fake whitespaces,
1980 // avoid printing them
1981 let inside_wrapped_string = line_number_layouts
1982 .get(row)
1983 .and_then(|layout| layout.as_ref())
1984 .is_none();
1985 if highlighted_chunk.is_tab {
1986 if non_whitespace_added || !inside_wrapped_string {
1987 invisibles.push(Invisible::Tab {
1988 line_start_offset: line.len(),
1989 });
1990 }
1991 } else {
1992 invisibles.extend(
1993 line_chunk
1994 .chars()
1995 .enumerate()
1996 .filter(|(_, line_char)| {
1997 let is_whitespace = line_char.is_whitespace();
1998 non_whitespace_added |= !is_whitespace;
1999 is_whitespace
2000 && (non_whitespace_added || !inside_wrapped_string)
2001 })
2002 .map(|(whitespace_index, _)| Invisible::Whitespace {
2003 line_offset: line.len() + whitespace_index,
2004 }),
2005 )
2006 }
2007 }
2008
2009 line.push_str(line_chunk);
2010 }
2011 }
2012 }
2013
2014 layouts
2015 }
2016
2017 fn draw(
2018 &self,
2019 layout: &LayoutState,
2020 row: u32,
2021 scroll_top: f32,
2022 scene: &mut SceneBuilder,
2023 content_origin: Vector2F,
2024 scroll_left: f32,
2025 visible_text_bounds: RectF,
2026 whitespace_setting: ShowWhitespaceSetting,
2027 selection_ranges: &[Range<DisplayPoint>],
2028 visible_bounds: RectF,
2029 cx: &mut ViewContext<Editor>,
2030 ) {
2031 let line_height = layout.position_map.line_height;
2032 let line_y = row as f32 * line_height - scroll_top;
2033
2034 self.line.paint(
2035 scene,
2036 content_origin + vec2f(-scroll_left, line_y),
2037 visible_text_bounds,
2038 line_height,
2039 cx,
2040 );
2041
2042 self.draw_invisibles(
2043 &selection_ranges,
2044 layout,
2045 content_origin,
2046 scroll_left,
2047 line_y,
2048 row,
2049 scene,
2050 visible_bounds,
2051 line_height,
2052 whitespace_setting,
2053 cx,
2054 );
2055 }
2056
2057 fn draw_invisibles(
2058 &self,
2059 selection_ranges: &[Range<DisplayPoint>],
2060 layout: &LayoutState,
2061 content_origin: Vector2F,
2062 scroll_left: f32,
2063 line_y: f32,
2064 row: u32,
2065 scene: &mut SceneBuilder,
2066 visible_bounds: RectF,
2067 line_height: f32,
2068 whitespace_setting: ShowWhitespaceSetting,
2069 cx: &mut ViewContext<Editor>,
2070 ) {
2071 let allowed_invisibles_regions = match whitespace_setting {
2072 ShowWhitespaceSetting::None => return,
2073 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2074 ShowWhitespaceSetting::All => None,
2075 };
2076
2077 for invisible in &self.invisibles {
2078 let (&token_offset, invisible_symbol) = match invisible {
2079 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2080 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2081 };
2082
2083 let x_offset = self.line.x_for_index(token_offset);
2084 let invisible_offset =
2085 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2086 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2087
2088 if let Some(allowed_regions) = allowed_invisibles_regions {
2089 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2090 if !allowed_regions
2091 .iter()
2092 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2093 {
2094 continue;
2095 }
2096 }
2097 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2098 }
2099 }
2100}
2101
2102#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2103enum Invisible {
2104 Tab { line_start_offset: usize },
2105 Whitespace { line_offset: usize },
2106}
2107
2108impl Element<Editor> for EditorElement {
2109 type LayoutState = LayoutState;
2110 type PaintState = ();
2111
2112 fn layout(
2113 &mut self,
2114 constraint: SizeConstraint,
2115 editor: &mut Editor,
2116 cx: &mut LayoutContext<Editor>,
2117 ) -> (Vector2F, Self::LayoutState) {
2118 let mut size = constraint.max;
2119 if size.x().is_infinite() {
2120 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2121 }
2122
2123 let snapshot = editor.snapshot(cx);
2124 let style = self.style.clone();
2125
2126 let line_height = (style.text.font_size * style.line_height_scalar).round();
2127
2128 let gutter_padding;
2129 let gutter_width;
2130 let gutter_margin;
2131 if snapshot.show_gutter {
2132 let em_width = style.text.em_width(cx.font_cache());
2133 gutter_padding = (em_width * style.gutter_padding_factor).round();
2134 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2135 gutter_margin = -style.text.descent(cx.font_cache());
2136 } else {
2137 gutter_padding = 0.0;
2138 gutter_width = 0.0;
2139 gutter_margin = 0.0;
2140 };
2141
2142 let text_width = size.x() - gutter_width;
2143 let em_width = style.text.em_width(cx.font_cache());
2144 let em_advance = style.text.em_advance(cx.font_cache());
2145 let overscroll = vec2f(em_width, 0.);
2146 let snapshot = {
2147 editor.set_visible_line_count(size.y() / line_height, cx);
2148
2149 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2150 let wrap_width = match editor.soft_wrap_mode(cx) {
2151 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2152 SoftWrap::EditorWidth => editor_width,
2153 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2154 };
2155
2156 if editor.set_wrap_width(Some(wrap_width), cx) {
2157 editor.snapshot(cx)
2158 } else {
2159 snapshot
2160 }
2161 };
2162
2163 let wrap_guides = editor
2164 .wrap_guides(cx)
2165 .iter()
2166 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2167 .collect();
2168
2169 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2170 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2171 size.set_y(
2172 scroll_height
2173 .min(constraint.max_along(Axis::Vertical))
2174 .max(constraint.min_along(Axis::Vertical))
2175 .min(line_height * max_lines as f32),
2176 )
2177 } else if let EditorMode::SingleLine = snapshot.mode {
2178 size.set_y(
2179 line_height
2180 .min(constraint.max_along(Axis::Vertical))
2181 .max(constraint.min_along(Axis::Vertical)),
2182 )
2183 } else if size.y().is_infinite() {
2184 size.set_y(scroll_height);
2185 }
2186 let gutter_size = vec2f(gutter_width, size.y());
2187 let text_size = vec2f(text_width, size.y());
2188
2189 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2190 let mut snapshot = editor.snapshot(cx);
2191
2192 let scroll_position = snapshot.scroll_position();
2193 // The scroll position is a fractional point, the whole number of which represents
2194 // the top of the window in terms of display rows.
2195 let start_row = scroll_position.y() as u32;
2196 let height_in_lines = size.y() / line_height;
2197 let max_row = snapshot.max_point().row();
2198
2199 // Add 1 to ensure selections bleed off screen
2200 let end_row = 1 + cmp::min(
2201 (scroll_position.y() + height_in_lines).ceil() as u32,
2202 max_row,
2203 );
2204
2205 let start_anchor = if start_row == 0 {
2206 Anchor::min()
2207 } else {
2208 snapshot
2209 .buffer_snapshot
2210 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2211 };
2212 let end_anchor = if end_row > max_row {
2213 Anchor::max()
2214 } else {
2215 snapshot
2216 .buffer_snapshot
2217 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2218 };
2219
2220 let mut selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)> = Vec::new();
2221 let mut active_rows = BTreeMap::new();
2222 let mut fold_ranges = Vec::new();
2223 let is_singleton = editor.is_singleton(cx);
2224
2225 let highlighted_rows = editor.highlighted_rows();
2226 let theme = theme::current(cx);
2227 let highlighted_ranges = editor.background_highlights_in_range(
2228 start_anchor..end_anchor,
2229 &snapshot.display_snapshot,
2230 theme.as_ref(),
2231 );
2232
2233 fold_ranges.extend(
2234 snapshot
2235 .folds_in_range(start_anchor..end_anchor)
2236 .map(|anchor| {
2237 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2238 (
2239 start.row,
2240 start.to_display_point(&snapshot.display_snapshot)
2241 ..anchor.end.to_display_point(&snapshot),
2242 )
2243 }),
2244 );
2245
2246 let mut remote_selections = HashMap::default();
2247 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2248 .buffer_snapshot
2249 .remote_selections_in_range(&(start_anchor..end_anchor))
2250 {
2251 let replica_id = if let Some(mapping) = &editor.replica_id_mapping {
2252 mapping.get(&replica_id).copied()
2253 } else {
2254 None
2255 };
2256
2257 // The local selections match the leader's selections.
2258 if replica_id.is_some() && replica_id == editor.leader_replica_id {
2259 continue;
2260 }
2261 remote_selections
2262 .entry(replica_id)
2263 .or_insert(Vec::new())
2264 .push(SelectionLayout::new(
2265 selection,
2266 line_mode,
2267 cursor_shape,
2268 &snapshot.display_snapshot,
2269 false,
2270 false,
2271 ));
2272 }
2273 selections.extend(remote_selections);
2274
2275 let mut newest_selection_head = None;
2276
2277 if editor.show_local_selections {
2278 let mut local_selections: Vec<Selection<Point>> = editor
2279 .selections
2280 .disjoint_in_range(start_anchor..end_anchor, cx);
2281 local_selections.extend(editor.selections.pending(cx));
2282 let mut layouts = Vec::new();
2283 let newest = editor.selections.newest(cx);
2284 for selection in local_selections.drain(..) {
2285 let is_empty = selection.start == selection.end;
2286 let is_newest = selection == newest;
2287
2288 let layout = SelectionLayout::new(
2289 selection,
2290 editor.selections.line_mode,
2291 editor.cursor_shape,
2292 &snapshot.display_snapshot,
2293 is_newest,
2294 true,
2295 );
2296 if is_newest {
2297 newest_selection_head = Some(layout.head);
2298 }
2299
2300 for row in cmp::max(layout.active_rows.start, start_row)
2301 ..=cmp::min(layout.active_rows.end, end_row)
2302 {
2303 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2304 *contains_non_empty_selection |= !is_empty;
2305 }
2306 layouts.push(layout);
2307 }
2308
2309 // Render the local selections in the leader's color when following.
2310 let local_replica_id = if let Some(leader_replica_id) = editor.leader_replica_id {
2311 leader_replica_id
2312 } else {
2313 let replica_id = editor.replica_id(cx);
2314 if let Some(mapping) = &editor.replica_id_mapping {
2315 mapping.get(&replica_id).copied().unwrap_or(replica_id)
2316 } else {
2317 replica_id
2318 }
2319 };
2320
2321 selections.push((Some(local_replica_id), layouts));
2322 }
2323
2324 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2325 let show_scrollbars = match scrollbar_settings.show {
2326 ShowScrollbar::Auto => {
2327 // Git
2328 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2329 ||
2330 // Selections
2331 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2332 // Scrollmanager
2333 || editor.scroll_manager.scrollbars_visible()
2334 }
2335 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2336 ShowScrollbar::Always => true,
2337 ShowScrollbar::Never => false,
2338 };
2339
2340 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2341 .into_iter()
2342 .map(|(id, fold)| {
2343 let color = self
2344 .style
2345 .folds
2346 .ellipses
2347 .background
2348 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2349 .color;
2350
2351 (id, fold, color)
2352 })
2353 .collect();
2354
2355 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2356 start_row..end_row,
2357 &active_rows,
2358 is_singleton,
2359 &snapshot,
2360 cx,
2361 );
2362
2363 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2364
2365 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2366
2367 let mut max_visible_line_width = 0.0;
2368 let line_layouts =
2369 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2370 for line_with_invisibles in &line_layouts {
2371 if line_with_invisibles.line.width() > max_visible_line_width {
2372 max_visible_line_width = line_with_invisibles.line.width();
2373 }
2374 }
2375
2376 let style = self.style.clone();
2377 let longest_line_width = layout_line(
2378 snapshot.longest_row(),
2379 &snapshot,
2380 &style,
2381 cx.text_layout_cache(),
2382 )
2383 .width();
2384 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2385 let em_width = style.text.em_width(cx.font_cache());
2386 let (scroll_width, blocks) = self.layout_blocks(
2387 start_row..end_row,
2388 &snapshot,
2389 size.x(),
2390 scroll_width,
2391 gutter_padding,
2392 gutter_width,
2393 em_width,
2394 gutter_width + gutter_margin,
2395 line_height,
2396 &style,
2397 &line_layouts,
2398 editor,
2399 cx,
2400 );
2401
2402 let scroll_max = vec2f(
2403 ((scroll_width - text_size.x()) / em_width).max(0.0),
2404 max_row as f32,
2405 );
2406
2407 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2408
2409 let autoscrolled = if autoscroll_horizontally {
2410 editor.autoscroll_horizontally(
2411 start_row,
2412 text_size.x(),
2413 scroll_width,
2414 em_width,
2415 &line_layouts,
2416 cx,
2417 )
2418 } else {
2419 false
2420 };
2421
2422 if clamped || autoscrolled {
2423 snapshot = editor.snapshot(cx);
2424 }
2425
2426 let style = editor.style(cx);
2427
2428 let mut context_menu = None;
2429 let mut code_actions_indicator = None;
2430 if let Some(newest_selection_head) = newest_selection_head {
2431 if (start_row..end_row).contains(&newest_selection_head.row()) {
2432 if editor.context_menu_visible() {
2433 context_menu =
2434 editor.render_context_menu(newest_selection_head, style.clone(), cx);
2435 }
2436
2437 let active = matches!(
2438 editor.context_menu,
2439 Some(crate::ContextMenu::CodeActions(_))
2440 );
2441
2442 code_actions_indicator = editor
2443 .render_code_actions_indicator(&style, active, cx)
2444 .map(|indicator| (newest_selection_head.row(), indicator));
2445 }
2446 }
2447
2448 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2449 let mut hover = editor
2450 .hover_state
2451 .render(&snapshot, &style, visible_rows, cx);
2452 let mode = editor.mode;
2453
2454 let mut fold_indicators = editor.render_fold_indicators(
2455 fold_statuses,
2456 &style,
2457 editor.gutter_hovered,
2458 line_height,
2459 gutter_margin,
2460 cx,
2461 );
2462
2463 if let Some((_, context_menu)) = context_menu.as_mut() {
2464 context_menu.layout(
2465 SizeConstraint {
2466 min: Vector2F::zero(),
2467 max: vec2f(
2468 cx.window_size().x() * 0.7,
2469 (12. * line_height).min((size.y() - line_height) / 2.),
2470 ),
2471 },
2472 editor,
2473 cx,
2474 );
2475 }
2476
2477 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2478 indicator.layout(
2479 SizeConstraint::strict_along(
2480 Axis::Vertical,
2481 line_height * style.code_actions.vertical_scale,
2482 ),
2483 editor,
2484 cx,
2485 );
2486 }
2487
2488 for fold_indicator in fold_indicators.iter_mut() {
2489 if let Some(indicator) = fold_indicator.as_mut() {
2490 indicator.layout(
2491 SizeConstraint::strict_along(
2492 Axis::Vertical,
2493 line_height * style.code_actions.vertical_scale,
2494 ),
2495 editor,
2496 cx,
2497 );
2498 }
2499 }
2500
2501 if let Some((_, hover_popovers)) = hover.as_mut() {
2502 for hover_popover in hover_popovers.iter_mut() {
2503 hover_popover.layout(
2504 SizeConstraint {
2505 min: Vector2F::zero(),
2506 max: vec2f(
2507 (120. * em_width) // Default size
2508 .min(size.x() / 2.) // Shrink to half of the editor width
2509 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2510 (16. * line_height) // Default size
2511 .min(size.y() / 2.) // Shrink to half of the editor height
2512 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2513 ),
2514 },
2515 editor,
2516 cx,
2517 );
2518 }
2519 }
2520
2521 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2522 let invisible_symbol_style = RunStyle {
2523 color: self.style.whitespace,
2524 font_id: self.style.text.font_id,
2525 underline: Default::default(),
2526 };
2527
2528 (
2529 size,
2530 LayoutState {
2531 mode,
2532 position_map: Arc::new(PositionMap {
2533 size,
2534 scroll_max,
2535 line_layouts,
2536 line_height,
2537 em_width,
2538 em_advance,
2539 snapshot,
2540 }),
2541 visible_display_row_range: start_row..end_row,
2542 wrap_guides,
2543 gutter_size,
2544 gutter_padding,
2545 text_size,
2546 scrollbar_row_range,
2547 show_scrollbars,
2548 is_singleton,
2549 max_row,
2550 gutter_margin,
2551 active_rows,
2552 highlighted_rows,
2553 highlighted_ranges,
2554 fold_ranges,
2555 line_number_layouts,
2556 display_hunks,
2557 blocks,
2558 selections,
2559 context_menu,
2560 code_actions_indicator,
2561 fold_indicators,
2562 tab_invisible: cx.text_layout_cache().layout_str(
2563 "→",
2564 invisible_symbol_font_size,
2565 &[("→".len(), invisible_symbol_style)],
2566 ),
2567 space_invisible: cx.text_layout_cache().layout_str(
2568 "•",
2569 invisible_symbol_font_size,
2570 &[("•".len(), invisible_symbol_style)],
2571 ),
2572 hover_popovers: hover,
2573 },
2574 )
2575 }
2576
2577 fn paint(
2578 &mut self,
2579 scene: &mut SceneBuilder,
2580 bounds: RectF,
2581 visible_bounds: RectF,
2582 layout: &mut Self::LayoutState,
2583 editor: &mut Editor,
2584 cx: &mut PaintContext<Editor>,
2585 ) -> Self::PaintState {
2586 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2587 scene.push_layer(Some(visible_bounds));
2588
2589 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2590 let text_bounds = RectF::new(
2591 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2592 layout.text_size,
2593 );
2594
2595 Self::attach_mouse_handlers(
2596 scene,
2597 &layout.position_map,
2598 layout.hover_popovers.is_some(),
2599 visible_bounds,
2600 text_bounds,
2601 gutter_bounds,
2602 bounds,
2603 cx,
2604 );
2605
2606 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2607 if layout.gutter_size.x() > 0. {
2608 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2609 }
2610 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2611
2612 scene.push_layer(Some(bounds));
2613 if !layout.blocks.is_empty() {
2614 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2615 }
2616 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2617 scene.pop_layer();
2618
2619 scene.pop_layer();
2620 }
2621
2622 fn rect_for_text_range(
2623 &self,
2624 range_utf16: Range<usize>,
2625 bounds: RectF,
2626 _: RectF,
2627 layout: &Self::LayoutState,
2628 _: &Self::PaintState,
2629 _: &Editor,
2630 _: &ViewContext<Editor>,
2631 ) -> Option<RectF> {
2632 let text_bounds = RectF::new(
2633 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2634 layout.text_size,
2635 );
2636 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2637 let scroll_position = layout.position_map.snapshot.scroll_position();
2638 let start_row = scroll_position.y() as u32;
2639 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2640 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2641
2642 let range_start = OffsetUtf16(range_utf16.start)
2643 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2644 if range_start.row() < start_row {
2645 return None;
2646 }
2647
2648 let line = &layout
2649 .position_map
2650 .line_layouts
2651 .get((range_start.row() - start_row) as usize)?
2652 .line;
2653 let range_start_x = line.x_for_index(range_start.column() as usize);
2654 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2655 Some(RectF::new(
2656 content_origin
2657 + vec2f(
2658 range_start_x,
2659 range_start_y + layout.position_map.line_height,
2660 )
2661 - vec2f(scroll_left, scroll_top),
2662 vec2f(
2663 layout.position_map.em_width,
2664 layout.position_map.line_height,
2665 ),
2666 ))
2667 }
2668
2669 fn debug(
2670 &self,
2671 bounds: RectF,
2672 _: &Self::LayoutState,
2673 _: &Self::PaintState,
2674 _: &Editor,
2675 _: &ViewContext<Editor>,
2676 ) -> json::Value {
2677 json!({
2678 "type": "BufferElement",
2679 "bounds": bounds.to_json()
2680 })
2681 }
2682}
2683
2684type BufferRow = u32;
2685
2686pub struct LayoutState {
2687 position_map: Arc<PositionMap>,
2688 gutter_size: Vector2F,
2689 gutter_padding: f32,
2690 gutter_margin: f32,
2691 text_size: Vector2F,
2692 mode: EditorMode,
2693 wrap_guides: SmallVec<[(f32, bool); 2]>,
2694 visible_display_row_range: Range<u32>,
2695 active_rows: BTreeMap<u32, bool>,
2696 highlighted_rows: Option<Range<u32>>,
2697 line_number_layouts: Vec<Option<text_layout::Line>>,
2698 display_hunks: Vec<DisplayDiffHunk>,
2699 blocks: Vec<BlockLayout>,
2700 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2701 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2702 selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)>,
2703 scrollbar_row_range: Range<f32>,
2704 show_scrollbars: bool,
2705 is_singleton: bool,
2706 max_row: u32,
2707 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2708 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2709 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2710 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2711 tab_invisible: Line,
2712 space_invisible: Line,
2713}
2714
2715struct PositionMap {
2716 size: Vector2F,
2717 line_height: f32,
2718 scroll_max: Vector2F,
2719 em_width: f32,
2720 em_advance: f32,
2721 line_layouts: Vec<LineWithInvisibles>,
2722 snapshot: EditorSnapshot,
2723}
2724
2725impl PositionMap {
2726 /// Returns two display points:
2727 /// 1. The nearest *valid* position in the editor
2728 /// 2. An unclipped, potentially *invalid* position that maps directly to
2729 /// the given pixel position.
2730 fn point_for_position(
2731 &self,
2732 text_bounds: RectF,
2733 position: Vector2F,
2734 ) -> (DisplayPoint, DisplayPoint) {
2735 let scroll_position = self.snapshot.scroll_position();
2736 let position = position - text_bounds.origin();
2737 let y = position.y().max(0.0).min(self.size.y());
2738 let x = position.x() + (scroll_position.x() * self.em_width);
2739 let row = (y / self.line_height + scroll_position.y()) as u32;
2740 let (column, x_overshoot) = if let Some(line) = self
2741 .line_layouts
2742 .get(row as usize - scroll_position.y() as usize)
2743 .map(|line_with_spaces| &line_with_spaces.line)
2744 {
2745 if let Some(ix) = line.index_for_x(x) {
2746 (ix as u32, 0.0)
2747 } else {
2748 (line.len() as u32, 0f32.max(x - line.width()))
2749 }
2750 } else {
2751 (0, x)
2752 };
2753
2754 let mut target_point = DisplayPoint::new(row, column);
2755 let point = self.snapshot.clip_point(target_point, Bias::Left);
2756 // TODO kb looks wrong, need to construct inlay point instead? operate offsets?
2757 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2758
2759 (point, target_point)
2760 }
2761}
2762
2763struct BlockLayout {
2764 row: u32,
2765 element: AnyElement<Editor>,
2766 style: BlockStyle,
2767}
2768
2769fn layout_line(
2770 row: u32,
2771 snapshot: &EditorSnapshot,
2772 style: &EditorStyle,
2773 layout_cache: &TextLayoutCache,
2774) -> text_layout::Line {
2775 let mut line = snapshot.line(row);
2776
2777 if line.len() > MAX_LINE_LEN {
2778 let mut len = MAX_LINE_LEN;
2779 while !line.is_char_boundary(len) {
2780 len -= 1;
2781 }
2782
2783 line.truncate(len);
2784 }
2785
2786 layout_cache.layout_str(
2787 &line,
2788 style.text.font_size,
2789 &[(
2790 snapshot.line_len(row) as usize,
2791 RunStyle {
2792 font_id: style.text.font_id,
2793 color: Color::black(),
2794 underline: Default::default(),
2795 },
2796 )],
2797 )
2798}
2799
2800#[derive(Debug)]
2801pub struct Cursor {
2802 origin: Vector2F,
2803 block_width: f32,
2804 line_height: f32,
2805 color: Color,
2806 shape: CursorShape,
2807 block_text: Option<Line>,
2808}
2809
2810impl Cursor {
2811 pub fn new(
2812 origin: Vector2F,
2813 block_width: f32,
2814 line_height: f32,
2815 color: Color,
2816 shape: CursorShape,
2817 block_text: Option<Line>,
2818 ) -> Cursor {
2819 Cursor {
2820 origin,
2821 block_width,
2822 line_height,
2823 color,
2824 shape,
2825 block_text,
2826 }
2827 }
2828
2829 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2830 RectF::new(
2831 self.origin + origin,
2832 vec2f(self.block_width, self.line_height),
2833 )
2834 }
2835
2836 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2837 let bounds = match self.shape {
2838 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2839 CursorShape::Block | CursorShape::Hollow => RectF::new(
2840 self.origin + origin,
2841 vec2f(self.block_width, self.line_height),
2842 ),
2843 CursorShape::Underscore => RectF::new(
2844 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2845 vec2f(self.block_width, 2.0),
2846 ),
2847 };
2848
2849 //Draw background or border quad
2850 if matches!(self.shape, CursorShape::Hollow) {
2851 scene.push_quad(Quad {
2852 bounds,
2853 background: None,
2854 border: Border::all(1., self.color),
2855 corner_radii: Default::default(),
2856 });
2857 } else {
2858 scene.push_quad(Quad {
2859 bounds,
2860 background: Some(self.color),
2861 border: Default::default(),
2862 corner_radii: Default::default(),
2863 });
2864 }
2865
2866 if let Some(block_text) = &self.block_text {
2867 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2868 }
2869 }
2870
2871 pub fn shape(&self) -> CursorShape {
2872 self.shape
2873 }
2874}
2875
2876#[derive(Debug)]
2877pub struct HighlightedRange {
2878 pub start_y: f32,
2879 pub line_height: f32,
2880 pub lines: Vec<HighlightedRangeLine>,
2881 pub color: Color,
2882 pub corner_radius: f32,
2883}
2884
2885#[derive(Debug)]
2886pub struct HighlightedRangeLine {
2887 pub start_x: f32,
2888 pub end_x: f32,
2889}
2890
2891impl HighlightedRange {
2892 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2893 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2894 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2895 self.paint_lines(
2896 self.start_y + self.line_height,
2897 &self.lines[1..],
2898 bounds,
2899 scene,
2900 );
2901 } else {
2902 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2903 }
2904 }
2905
2906 fn paint_lines(
2907 &self,
2908 start_y: f32,
2909 lines: &[HighlightedRangeLine],
2910 bounds: RectF,
2911 scene: &mut SceneBuilder,
2912 ) {
2913 if lines.is_empty() {
2914 return;
2915 }
2916
2917 let mut path = PathBuilder::new();
2918 let first_line = lines.first().unwrap();
2919 let last_line = lines.last().unwrap();
2920
2921 let first_top_left = vec2f(first_line.start_x, start_y);
2922 let first_top_right = vec2f(first_line.end_x, start_y);
2923
2924 let curve_height = vec2f(0., self.corner_radius);
2925 let curve_width = |start_x: f32, end_x: f32| {
2926 let max = (end_x - start_x) / 2.;
2927 let width = if max < self.corner_radius {
2928 max
2929 } else {
2930 self.corner_radius
2931 };
2932
2933 vec2f(width, 0.)
2934 };
2935
2936 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2937 path.reset(first_top_right - top_curve_width);
2938 path.curve_to(first_top_right + curve_height, first_top_right);
2939
2940 let mut iter = lines.iter().enumerate().peekable();
2941 while let Some((ix, line)) = iter.next() {
2942 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2943
2944 if let Some((_, next_line)) = iter.peek() {
2945 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2946
2947 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2948 Ordering::Equal => {
2949 path.line_to(bottom_right);
2950 }
2951 Ordering::Less => {
2952 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2953 path.line_to(bottom_right - curve_height);
2954 if self.corner_radius > 0. {
2955 path.curve_to(bottom_right - curve_width, bottom_right);
2956 }
2957 path.line_to(next_top_right + curve_width);
2958 if self.corner_radius > 0. {
2959 path.curve_to(next_top_right + curve_height, next_top_right);
2960 }
2961 }
2962 Ordering::Greater => {
2963 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2964 path.line_to(bottom_right - curve_height);
2965 if self.corner_radius > 0. {
2966 path.curve_to(bottom_right + curve_width, bottom_right);
2967 }
2968 path.line_to(next_top_right - curve_width);
2969 if self.corner_radius > 0. {
2970 path.curve_to(next_top_right + curve_height, next_top_right);
2971 }
2972 }
2973 }
2974 } else {
2975 let curve_width = curve_width(line.start_x, line.end_x);
2976 path.line_to(bottom_right - curve_height);
2977 if self.corner_radius > 0. {
2978 path.curve_to(bottom_right - curve_width, bottom_right);
2979 }
2980
2981 let bottom_left = vec2f(line.start_x, bottom_right.y());
2982 path.line_to(bottom_left + curve_width);
2983 if self.corner_radius > 0. {
2984 path.curve_to(bottom_left - curve_height, bottom_left);
2985 }
2986 }
2987 }
2988
2989 if first_line.start_x > last_line.start_x {
2990 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2991 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2992 path.line_to(second_top_left + curve_height);
2993 if self.corner_radius > 0. {
2994 path.curve_to(second_top_left + curve_width, second_top_left);
2995 }
2996 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2997 path.line_to(first_bottom_left - curve_width);
2998 if self.corner_radius > 0. {
2999 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3000 }
3001 }
3002
3003 path.line_to(first_top_left + curve_height);
3004 if self.corner_radius > 0. {
3005 path.curve_to(first_top_left + top_curve_width, first_top_left);
3006 }
3007 path.line_to(first_top_right - top_curve_width);
3008
3009 scene.push_path(path.build(self.color, Some(bounds)));
3010 }
3011}
3012
3013fn range_to_bounds(
3014 range: &Range<DisplayPoint>,
3015 content_origin: Vector2F,
3016 scroll_left: f32,
3017 scroll_top: f32,
3018 visible_row_range: &Range<u32>,
3019 line_end_overshoot: f32,
3020 position_map: &PositionMap,
3021) -> impl Iterator<Item = RectF> {
3022 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
3023
3024 if range.start == range.end {
3025 return bounds.into_iter();
3026 }
3027
3028 let start_row = visible_row_range.start;
3029 let end_row = visible_row_range.end;
3030
3031 let row_range = if range.end.column() == 0 {
3032 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
3033 } else {
3034 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
3035 };
3036
3037 let first_y =
3038 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
3039
3040 for (idx, row) in row_range.enumerate() {
3041 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
3042
3043 let start_x = if row == range.start.row() {
3044 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
3045 - scroll_left
3046 } else {
3047 content_origin.x() - scroll_left
3048 };
3049
3050 let end_x = if row == range.end.row() {
3051 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
3052 } else {
3053 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
3054 };
3055
3056 bounds.push(RectF::from_points(
3057 vec2f(start_x, first_y + position_map.line_height * idx as f32),
3058 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
3059 ))
3060 }
3061
3062 bounds.into_iter()
3063}
3064
3065pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
3066 delta.powf(1.5) / 100.0
3067}
3068
3069fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3070 delta.powf(1.2) / 300.0
3071}
3072
3073#[cfg(test)]
3074mod tests {
3075 use super::*;
3076 use crate::{
3077 display_map::{BlockDisposition, BlockProperties},
3078 editor_tests::{init_test, update_test_language_settings},
3079 Editor, MultiBuffer,
3080 };
3081 use gpui::TestAppContext;
3082 use language::language_settings;
3083 use log::info;
3084 use std::{num::NonZeroU32, sync::Arc};
3085 use util::test::sample_text;
3086
3087 #[gpui::test]
3088 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3089 init_test(cx, |_| {});
3090
3091 let editor = cx
3092 .add_window(|cx| {
3093 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3094 Editor::new(EditorMode::Full, buffer, None, None, cx)
3095 })
3096 .root(cx);
3097 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3098
3099 let layouts = editor.update(cx, |editor, cx| {
3100 let snapshot = editor.snapshot(cx);
3101 element
3102 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
3103 .0
3104 });
3105 assert_eq!(layouts.len(), 6);
3106 }
3107
3108 #[gpui::test]
3109 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3110 init_test(cx, |_| {});
3111
3112 let editor = cx
3113 .add_window(|cx| {
3114 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3115 Editor::new(EditorMode::Full, buffer, None, None, cx)
3116 })
3117 .root(cx);
3118 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3119 let (_, state) = editor.update(cx, |editor, cx| {
3120 editor.cursor_shape = CursorShape::Block;
3121 editor.change_selections(None, cx, |s| {
3122 s.select_ranges([
3123 Point::new(0, 0)..Point::new(1, 0),
3124 Point::new(3, 2)..Point::new(3, 3),
3125 Point::new(5, 6)..Point::new(6, 0),
3126 ]);
3127 });
3128 let mut new_parents = Default::default();
3129 let mut notify_views_if_parents_change = Default::default();
3130 let mut layout_cx = LayoutContext::new(
3131 cx,
3132 &mut new_parents,
3133 &mut notify_views_if_parents_change,
3134 false,
3135 );
3136 element.layout(
3137 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3138 editor,
3139 &mut layout_cx,
3140 )
3141 });
3142 assert_eq!(state.selections.len(), 1);
3143 let local_selections = &state.selections[0].1;
3144 assert_eq!(local_selections.len(), 3);
3145 // moves cursor back one line
3146 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3147 assert_eq!(
3148 local_selections[0].range,
3149 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3150 );
3151
3152 // moves cursor back one column
3153 assert_eq!(
3154 local_selections[1].range,
3155 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3156 );
3157 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3158
3159 // leaves cursor on the max point
3160 assert_eq!(
3161 local_selections[2].range,
3162 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3163 );
3164 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3165
3166 // active lines does not include 1 (even though the range of the selection does)
3167 assert_eq!(
3168 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3169 vec![0, 3, 5, 6]
3170 );
3171
3172 // multi-buffer support
3173 // in DisplayPoint co-ordinates, this is what we're dealing with:
3174 // 0: [[file
3175 // 1: header]]
3176 // 2: aaaaaa
3177 // 3: bbbbbb
3178 // 4: cccccc
3179 // 5:
3180 // 6: ...
3181 // 7: ffffff
3182 // 8: gggggg
3183 // 9: hhhhhh
3184 // 10:
3185 // 11: [[file
3186 // 12: header]]
3187 // 13: bbbbbb
3188 // 14: cccccc
3189 // 15: dddddd
3190 let editor = cx
3191 .add_window(|cx| {
3192 let buffer = MultiBuffer::build_multi(
3193 [
3194 (
3195 &(sample_text(8, 6, 'a') + "\n"),
3196 vec![
3197 Point::new(0, 0)..Point::new(3, 0),
3198 Point::new(4, 0)..Point::new(7, 0),
3199 ],
3200 ),
3201 (
3202 &(sample_text(8, 6, 'a') + "\n"),
3203 vec![Point::new(1, 0)..Point::new(3, 0)],
3204 ),
3205 ],
3206 cx,
3207 );
3208 Editor::new(EditorMode::Full, buffer, None, None, cx)
3209 })
3210 .root(cx);
3211 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3212 let (_, state) = editor.update(cx, |editor, cx| {
3213 editor.cursor_shape = CursorShape::Block;
3214 editor.change_selections(None, cx, |s| {
3215 s.select_display_ranges([
3216 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3217 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3218 ]);
3219 });
3220 let mut new_parents = Default::default();
3221 let mut notify_views_if_parents_change = Default::default();
3222 let mut layout_cx = LayoutContext::new(
3223 cx,
3224 &mut new_parents,
3225 &mut notify_views_if_parents_change,
3226 false,
3227 );
3228 element.layout(
3229 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3230 editor,
3231 &mut layout_cx,
3232 )
3233 });
3234
3235 assert_eq!(state.selections.len(), 1);
3236 let local_selections = &state.selections[0].1;
3237 assert_eq!(local_selections.len(), 2);
3238
3239 // moves cursor on excerpt boundary back a line
3240 // and doesn't allow selection to bleed through
3241 assert_eq!(
3242 local_selections[0].range,
3243 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3244 );
3245 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3246
3247 // moves cursor on buffer boundary back two lines
3248 // and doesn't allow selection to bleed through
3249 assert_eq!(
3250 local_selections[1].range,
3251 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3252 );
3253 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3254 }
3255
3256 #[gpui::test]
3257 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3258 init_test(cx, |_| {});
3259
3260 let editor = cx
3261 .add_window(|cx| {
3262 let buffer = MultiBuffer::build_simple("", cx);
3263 Editor::new(EditorMode::Full, buffer, None, None, cx)
3264 })
3265 .root(cx);
3266
3267 editor.update(cx, |editor, cx| {
3268 editor.set_placeholder_text("hello", cx);
3269 editor.insert_blocks(
3270 [BlockProperties {
3271 style: BlockStyle::Fixed,
3272 disposition: BlockDisposition::Above,
3273 height: 3,
3274 position: Anchor::min(),
3275 render: Arc::new(|_| Empty::new().into_any()),
3276 }],
3277 None,
3278 cx,
3279 );
3280
3281 // Blur the editor so that it displays placeholder text.
3282 cx.blur();
3283 });
3284
3285 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3286 let (size, mut state) = editor.update(cx, |editor, cx| {
3287 let mut new_parents = Default::default();
3288 let mut notify_views_if_parents_change = Default::default();
3289 let mut layout_cx = LayoutContext::new(
3290 cx,
3291 &mut new_parents,
3292 &mut notify_views_if_parents_change,
3293 false,
3294 );
3295 element.layout(
3296 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3297 editor,
3298 &mut layout_cx,
3299 )
3300 });
3301
3302 assert_eq!(state.position_map.line_layouts.len(), 4);
3303 assert_eq!(
3304 state
3305 .line_number_layouts
3306 .iter()
3307 .map(Option::is_some)
3308 .collect::<Vec<_>>(),
3309 &[false, false, false, true]
3310 );
3311
3312 // Don't panic.
3313 let mut scene = SceneBuilder::new(1.0);
3314 let bounds = RectF::new(Default::default(), size);
3315 editor.update(cx, |editor, cx| {
3316 element.paint(
3317 &mut scene,
3318 bounds,
3319 bounds,
3320 &mut state,
3321 editor,
3322 &mut PaintContext::new(cx),
3323 );
3324 });
3325 }
3326
3327 #[gpui::test]
3328 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3329 const TAB_SIZE: u32 = 4;
3330
3331 let input_text = "\t \t|\t| a b";
3332 let expected_invisibles = vec![
3333 Invisible::Tab {
3334 line_start_offset: 0,
3335 },
3336 Invisible::Whitespace {
3337 line_offset: TAB_SIZE as usize,
3338 },
3339 Invisible::Tab {
3340 line_start_offset: TAB_SIZE as usize + 1,
3341 },
3342 Invisible::Tab {
3343 line_start_offset: TAB_SIZE as usize * 2 + 1,
3344 },
3345 Invisible::Whitespace {
3346 line_offset: TAB_SIZE as usize * 3 + 1,
3347 },
3348 Invisible::Whitespace {
3349 line_offset: TAB_SIZE as usize * 3 + 3,
3350 },
3351 ];
3352 assert_eq!(
3353 expected_invisibles.len(),
3354 input_text
3355 .chars()
3356 .filter(|initial_char| initial_char.is_whitespace())
3357 .count(),
3358 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3359 );
3360
3361 init_test(cx, |s| {
3362 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3363 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3364 });
3365
3366 let actual_invisibles =
3367 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3368
3369 assert_eq!(expected_invisibles, actual_invisibles);
3370 }
3371
3372 #[gpui::test]
3373 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3374 init_test(cx, |s| {
3375 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3376 s.defaults.tab_size = NonZeroU32::new(4);
3377 });
3378
3379 for editor_mode_without_invisibles in [
3380 EditorMode::SingleLine,
3381 EditorMode::AutoHeight { max_lines: 100 },
3382 ] {
3383 let invisibles = collect_invisibles_from_new_editor(
3384 cx,
3385 editor_mode_without_invisibles,
3386 "\t\t\t| | a b",
3387 500.0,
3388 );
3389 assert!(invisibles.is_empty(),
3390 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3391 }
3392 }
3393
3394 #[gpui::test]
3395 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3396 let tab_size = 4;
3397 let input_text = "a\tbcd ".repeat(9);
3398 let repeated_invisibles = [
3399 Invisible::Tab {
3400 line_start_offset: 1,
3401 },
3402 Invisible::Whitespace {
3403 line_offset: tab_size as usize + 3,
3404 },
3405 Invisible::Whitespace {
3406 line_offset: tab_size as usize + 4,
3407 },
3408 Invisible::Whitespace {
3409 line_offset: tab_size as usize + 5,
3410 },
3411 ];
3412 let expected_invisibles = std::iter::once(repeated_invisibles)
3413 .cycle()
3414 .take(9)
3415 .flatten()
3416 .collect::<Vec<_>>();
3417 assert_eq!(
3418 expected_invisibles.len(),
3419 input_text
3420 .chars()
3421 .filter(|initial_char| initial_char.is_whitespace())
3422 .count(),
3423 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3424 );
3425 info!("Expected invisibles: {expected_invisibles:?}");
3426
3427 init_test(cx, |_| {});
3428
3429 // Put the same string with repeating whitespace pattern into editors of various size,
3430 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3431 let resize_step = 10.0;
3432 let mut editor_width = 200.0;
3433 while editor_width <= 1000.0 {
3434 update_test_language_settings(cx, |s| {
3435 s.defaults.tab_size = NonZeroU32::new(tab_size);
3436 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3437 s.defaults.preferred_line_length = Some(editor_width as u32);
3438 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3439 });
3440
3441 let actual_invisibles =
3442 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3443
3444 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3445 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3446 let mut i = 0;
3447 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3448 i = actual_index;
3449 match expected_invisibles.get(i) {
3450 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3451 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3452 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3453 _ => {
3454 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3455 }
3456 },
3457 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3458 }
3459 }
3460 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3461 assert!(
3462 missing_expected_invisibles.is_empty(),
3463 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3464 );
3465
3466 editor_width += resize_step;
3467 }
3468 }
3469
3470 fn collect_invisibles_from_new_editor(
3471 cx: &mut TestAppContext,
3472 editor_mode: EditorMode,
3473 input_text: &str,
3474 editor_width: f32,
3475 ) -> Vec<Invisible> {
3476 info!(
3477 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3478 );
3479 let editor = cx
3480 .add_window(|cx| {
3481 let buffer = MultiBuffer::build_simple(&input_text, cx);
3482 Editor::new(editor_mode, buffer, None, None, cx)
3483 })
3484 .root(cx);
3485
3486 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3487 let (_, layout_state) = editor.update(cx, |editor, cx| {
3488 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3489 editor.set_wrap_width(Some(editor_width), cx);
3490
3491 let mut new_parents = Default::default();
3492 let mut notify_views_if_parents_change = Default::default();
3493 let mut layout_cx = LayoutContext::new(
3494 cx,
3495 &mut new_parents,
3496 &mut notify_views_if_parents_change,
3497 false,
3498 );
3499 element.layout(
3500 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3501 editor,
3502 &mut layout_cx,
3503 )
3504 });
3505
3506 layout_state
3507 .position_map
3508 .line_layouts
3509 .iter()
3510 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3511 .flatten()
3512 .cloned()
3513 .collect()
3514 }
3515}