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, InlayOffset, 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, ResolveState,
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 point_for_position = position_map.point_for_position(text_bounds, position);
291 let position = point_for_position.previous_valid;
292 if shift && alt {
293 editor.select(
294 SelectPhase::BeginColumnar {
295 position,
296 goal_column: point_for_position.exact_unclipped.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 let point_for_position = position_map.point_for_position(text_bounds, position);
333 mouse_context_menu::deploy_context_menu(
334 editor,
335 position,
336 point_for_position.previous_valid,
337 cx,
338 );
339 true
340 }
341
342 fn mouse_up(
343 editor: &mut Editor,
344 position: Vector2F,
345 cmd: bool,
346 shift: bool,
347 alt: bool,
348 position_map: &PositionMap,
349 text_bounds: RectF,
350 cx: &mut EventContext<Editor>,
351 ) -> bool {
352 let end_selection = editor.has_pending_selection();
353 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
354
355 if end_selection {
356 editor.select(SelectPhase::End, cx);
357 }
358
359 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
360 if let Some(point) = position_map
361 .point_for_position(text_bounds, position)
362 .as_valid()
363 {
364 if shift {
365 go_to_fetched_type_definition(editor, point, alt, cx);
366 } else {
367 go_to_fetched_definition(editor, point, alt, cx);
368 }
369
370 return true;
371 }
372 }
373
374 end_selection
375 }
376
377 fn mouse_dragged(
378 editor: &mut Editor,
379 MouseMovedEvent {
380 modifiers: Modifiers { cmd, shift, .. },
381 position,
382 ..
383 }: MouseMovedEvent,
384 position_map: &PositionMap,
385 text_bounds: RectF,
386 cx: &mut EventContext<Editor>,
387 ) -> bool {
388 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
389 // Don't trigger hover popover if mouse is hovering over context menu
390 let point = if text_bounds.contains_point(position) {
391 position_map
392 .point_for_position(text_bounds, position)
393 .as_valid()
394 } else {
395 None
396 };
397
398 update_go_to_definition_link(editor, point, cmd, shift, cx);
399
400 if editor.has_pending_selection() {
401 let mut scroll_delta = Vector2F::zero();
402
403 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
404 let top = text_bounds.origin_y() + vertical_margin;
405 let bottom = text_bounds.lower_left().y() - vertical_margin;
406 if position.y() < top {
407 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
408 }
409 if position.y() > bottom {
410 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
411 }
412
413 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
414 let left = text_bounds.origin_x() + horizontal_margin;
415 let right = text_bounds.upper_right().x() - horizontal_margin;
416 if position.x() < left {
417 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
418 left - position.x(),
419 ))
420 }
421 if position.x() > right {
422 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
423 position.x() - right,
424 ))
425 }
426
427 let point_for_position = position_map.point_for_position(text_bounds, position);
428
429 editor.select(
430 SelectPhase::Update {
431 position: point_for_position.previous_valid,
432 goal_column: point_for_position.exact_unclipped.column(),
433 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
434 .clamp(Vector2F::zero(), position_map.scroll_max),
435 },
436 cx,
437 );
438 hover_at(editor, point, cx);
439 true
440 } else {
441 hover_at(editor, point, cx);
442 false
443 }
444 }
445
446 fn mouse_moved(
447 editor: &mut Editor,
448 MouseMovedEvent {
449 modifiers: Modifiers { shift, cmd, .. },
450 position,
451 ..
452 }: MouseMovedEvent,
453 position_map: &PositionMap,
454 text_bounds: RectF,
455 cx: &mut ViewContext<Editor>,
456 ) -> bool {
457 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
458 // Don't trigger hover popover if mouse is hovering over context menu
459 if text_bounds.contains_point(position) {
460 let point_for_position = position_map.point_for_position(text_bounds, position);
461 match point_for_position.as_valid() {
462 Some(point) => {
463 update_go_to_definition_link(editor, Some(point), cmd, shift, cx);
464 hover_at(editor, Some(point), cx);
465 }
466 None => {
467 update_inlay_link_and_hover_points(
468 position_map,
469 point_for_position,
470 editor,
471 cx,
472 );
473 }
474 }
475 } else {
476 update_go_to_definition_link(editor, None, cmd, shift, cx);
477 hover_at(editor, None, cx);
478 }
479
480 true
481 }
482
483 fn scroll(
484 editor: &mut Editor,
485 position: Vector2F,
486 mut delta: Vector2F,
487 precise: bool,
488 position_map: &PositionMap,
489 bounds: RectF,
490 cx: &mut ViewContext<Editor>,
491 ) -> bool {
492 if !bounds.contains_point(position) {
493 return false;
494 }
495
496 let line_height = position_map.line_height;
497 let max_glyph_width = position_map.em_width;
498
499 let axis = if precise {
500 //Trackpad
501 position_map.snapshot.ongoing_scroll.filter(&mut delta)
502 } else {
503 //Not trackpad
504 delta *= vec2f(max_glyph_width, line_height);
505 None //Resets ongoing scroll
506 };
507
508 let scroll_position = position_map.snapshot.scroll_position();
509 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
510 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
511 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
512 editor.scroll(scroll_position, axis, cx);
513
514 true
515 }
516
517 fn paint_background(
518 &self,
519 scene: &mut SceneBuilder,
520 gutter_bounds: RectF,
521 text_bounds: RectF,
522 layout: &LayoutState,
523 ) {
524 let bounds = gutter_bounds.union_rect(text_bounds);
525 let scroll_top =
526 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
527 scene.push_quad(Quad {
528 bounds: gutter_bounds,
529 background: Some(self.style.gutter_background),
530 border: Border::new(0., Color::transparent_black()),
531 corner_radii: Default::default(),
532 });
533 scene.push_quad(Quad {
534 bounds: text_bounds,
535 background: Some(self.style.background),
536 border: Border::new(0., Color::transparent_black()),
537 corner_radii: Default::default(),
538 });
539
540 if let EditorMode::Full = layout.mode {
541 let mut active_rows = layout.active_rows.iter().peekable();
542 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
543 let mut end_row = *start_row;
544 while active_rows.peek().map_or(false, |r| {
545 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
546 }) {
547 active_rows.next().unwrap();
548 end_row += 1;
549 }
550
551 if !contains_non_empty_selection {
552 let origin = vec2f(
553 bounds.origin_x(),
554 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
555 - scroll_top,
556 );
557 let size = vec2f(
558 bounds.width(),
559 layout.position_map.line_height * (end_row - start_row + 1) as f32,
560 );
561 scene.push_quad(Quad {
562 bounds: RectF::new(origin, size),
563 background: Some(self.style.active_line_background),
564 border: Border::default(),
565 corner_radii: Default::default(),
566 });
567 }
568 }
569
570 if let Some(highlighted_rows) = &layout.highlighted_rows {
571 let origin = vec2f(
572 bounds.origin_x(),
573 bounds.origin_y()
574 + (layout.position_map.line_height * highlighted_rows.start as f32)
575 - scroll_top,
576 );
577 let size = vec2f(
578 bounds.width(),
579 layout.position_map.line_height * highlighted_rows.len() as f32,
580 );
581 scene.push_quad(Quad {
582 bounds: RectF::new(origin, size),
583 background: Some(self.style.highlighted_line_background),
584 border: Border::default(),
585 corner_radii: Default::default(),
586 });
587 }
588
589 let scroll_left =
590 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
591
592 for (wrap_position, active) in layout.wrap_guides.iter() {
593 let x =
594 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
595 - scroll_left;
596
597 if x < text_bounds.origin_x()
598 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
599 {
600 continue;
601 }
602
603 let color = if *active {
604 self.style.active_wrap_guide
605 } else {
606 self.style.wrap_guide
607 };
608 scene.push_quad(Quad {
609 bounds: RectF::new(
610 vec2f(x, text_bounds.origin_y()),
611 vec2f(1., text_bounds.height()),
612 ),
613 background: Some(color),
614 border: Border::new(0., Color::transparent_black()),
615 corner_radii: Default::default(),
616 });
617 }
618 }
619 }
620
621 fn paint_gutter(
622 &mut self,
623 scene: &mut SceneBuilder,
624 bounds: RectF,
625 visible_bounds: RectF,
626 layout: &mut LayoutState,
627 editor: &mut Editor,
628 cx: &mut PaintContext<Editor>,
629 ) {
630 let line_height = layout.position_map.line_height;
631
632 let scroll_position = layout.position_map.snapshot.scroll_position();
633 let scroll_top = scroll_position.y() * line_height;
634
635 let show_gutter = matches!(
636 settings::get::<ProjectSettings>(cx).git.git_gutter,
637 Some(GitGutterSetting::TrackedFiles)
638 );
639
640 if show_gutter {
641 Self::paint_diff_hunks(scene, bounds, layout, cx);
642 }
643
644 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
645 if let Some(line) = line {
646 let line_origin = bounds.origin()
647 + vec2f(
648 bounds.width() - line.width() - layout.gutter_padding,
649 ix as f32 * line_height - (scroll_top % line_height),
650 );
651
652 line.paint(scene, line_origin, visible_bounds, line_height, cx);
653 }
654 }
655
656 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
657 if let Some(indicator) = fold_indicator.as_mut() {
658 let position = vec2f(
659 bounds.width() - layout.gutter_padding,
660 ix as f32 * line_height - (scroll_top % line_height),
661 );
662 let centering_offset = vec2f(
663 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
664 (line_height - indicator.size().y()) / 2.,
665 );
666
667 let indicator_origin = bounds.origin() + position + centering_offset;
668
669 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
670 }
671 }
672
673 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
674 let mut x = 0.;
675 let mut y = *row as f32 * line_height - scroll_top;
676 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
677 y += (line_height - indicator.size().y()) / 2.;
678 indicator.paint(
679 scene,
680 bounds.origin() + vec2f(x, y),
681 visible_bounds,
682 editor,
683 cx,
684 );
685 }
686 }
687
688 fn paint_diff_hunks(
689 scene: &mut SceneBuilder,
690 bounds: RectF,
691 layout: &mut LayoutState,
692 cx: &mut ViewContext<Editor>,
693 ) {
694 let diff_style = &theme::current(cx).editor.diff.clone();
695 let line_height = layout.position_map.line_height;
696
697 let scroll_position = layout.position_map.snapshot.scroll_position();
698 let scroll_top = scroll_position.y() * line_height;
699
700 for hunk in &layout.display_hunks {
701 let (display_row_range, status) = match hunk {
702 //TODO: This rendering is entirely a horrible hack
703 &DisplayDiffHunk::Folded { display_row: row } => {
704 let start_y = row as f32 * line_height - scroll_top;
705 let end_y = start_y + line_height;
706
707 let width = diff_style.removed_width_em * line_height;
708 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
709 let highlight_size = vec2f(width * 2., end_y - start_y);
710 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
711
712 scene.push_quad(Quad {
713 bounds: highlight_bounds,
714 background: Some(diff_style.modified),
715 border: Border::new(0., Color::transparent_black()),
716 corner_radii: (1. * line_height).into(),
717 });
718
719 continue;
720 }
721
722 DisplayDiffHunk::Unfolded {
723 display_row_range,
724 status,
725 } => (display_row_range, status),
726 };
727
728 let color = match status {
729 DiffHunkStatus::Added => diff_style.inserted,
730 DiffHunkStatus::Modified => diff_style.modified,
731
732 //TODO: This rendering is entirely a horrible hack
733 DiffHunkStatus::Removed => {
734 let row = display_row_range.start;
735
736 let offset = line_height / 2.;
737 let start_y = row as f32 * line_height - offset - scroll_top;
738 let end_y = start_y + line_height;
739
740 let width = diff_style.removed_width_em * line_height;
741 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
742 let highlight_size = vec2f(width * 2., end_y - start_y);
743 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
744
745 scene.push_quad(Quad {
746 bounds: highlight_bounds,
747 background: Some(diff_style.deleted),
748 border: Border::new(0., Color::transparent_black()),
749 corner_radii: (1. * line_height).into(),
750 });
751
752 continue;
753 }
754 };
755
756 let start_row = display_row_range.start;
757 let end_row = display_row_range.end;
758
759 let start_y = start_row as f32 * line_height - scroll_top;
760 let end_y = end_row as f32 * line_height - scroll_top;
761
762 let width = diff_style.width_em * line_height;
763 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
764 let highlight_size = vec2f(width * 2., end_y - start_y);
765 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
766
767 scene.push_quad(Quad {
768 bounds: highlight_bounds,
769 background: Some(color),
770 border: Border::new(0., Color::transparent_black()),
771 corner_radii: (diff_style.corner_radius * line_height).into(),
772 });
773 }
774 }
775
776 fn paint_text(
777 &mut self,
778 scene: &mut SceneBuilder,
779 bounds: RectF,
780 visible_bounds: RectF,
781 layout: &mut LayoutState,
782 editor: &mut Editor,
783 cx: &mut PaintContext<Editor>,
784 ) {
785 let style = &self.style;
786 let scroll_position = layout.position_map.snapshot.scroll_position();
787 let start_row = layout.visible_display_row_range.start;
788 let scroll_top = scroll_position.y() * layout.position_map.line_height;
789 let max_glyph_width = layout.position_map.em_width;
790 let scroll_left = scroll_position.x() * max_glyph_width;
791 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
792 let line_end_overshoot = 0.15 * layout.position_map.line_height;
793 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
794
795 scene.push_layer(Some(bounds));
796
797 scene.push_cursor_region(CursorRegion {
798 bounds,
799 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
800 CursorStyle::PointingHand
801 } else {
802 CursorStyle::IBeam
803 },
804 });
805
806 let fold_corner_radius =
807 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
808 for (id, range, color) in layout.fold_ranges.iter() {
809 self.paint_highlighted_range(
810 scene,
811 range.clone(),
812 *color,
813 fold_corner_radius,
814 fold_corner_radius * 2.,
815 layout,
816 content_origin,
817 scroll_top,
818 scroll_left,
819 bounds,
820 );
821
822 for bound in range_to_bounds(
823 &range,
824 content_origin,
825 scroll_left,
826 scroll_top,
827 &layout.visible_display_row_range,
828 line_end_overshoot,
829 &layout.position_map,
830 ) {
831 scene.push_cursor_region(CursorRegion {
832 bounds: bound,
833 style: CursorStyle::PointingHand,
834 });
835
836 let display_row = range.start.row();
837
838 let buffer_row = DisplayPoint::new(display_row, 0)
839 .to_point(&layout.position_map.snapshot.display_snapshot)
840 .row;
841
842 scene.push_mouse_region(
843 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
844 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
845 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
846 })
847 .with_notify_on_hover(true)
848 .with_notify_on_click(true),
849 )
850 }
851 }
852
853 for (range, color) in &layout.highlighted_ranges {
854 self.paint_highlighted_range(
855 scene,
856 range.clone(),
857 *color,
858 0.,
859 line_end_overshoot,
860 layout,
861 content_origin,
862 scroll_top,
863 scroll_left,
864 bounds,
865 );
866 }
867
868 let mut cursors = SmallVec::<[Cursor; 32]>::new();
869 let corner_radius = 0.15 * layout.position_map.line_height;
870 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
871
872 for (replica_id, selections) in &layout.selections {
873 let replica_id = *replica_id;
874 let selection_style = if let Some(replica_id) = replica_id {
875 style.replica_selection_style(replica_id)
876 } else {
877 &style.absent_selection
878 };
879
880 for selection in selections {
881 self.paint_highlighted_range(
882 scene,
883 selection.range.clone(),
884 selection_style.selection,
885 corner_radius,
886 corner_radius * 2.,
887 layout,
888 content_origin,
889 scroll_top,
890 scroll_left,
891 bounds,
892 );
893
894 if selection.is_local && !selection.range.is_empty() {
895 invisible_display_ranges.push(selection.range.clone());
896 }
897 if !selection.is_local || editor.show_local_cursors(cx) {
898 let cursor_position = selection.head;
899 if layout
900 .visible_display_row_range
901 .contains(&cursor_position.row())
902 {
903 let cursor_row_layout = &layout.position_map.line_layouts
904 [(cursor_position.row() - start_row) as usize]
905 .line;
906 let cursor_column = cursor_position.column() as usize;
907
908 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
909 let mut block_width =
910 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
911 if block_width == 0.0 {
912 block_width = layout.position_map.em_width;
913 }
914 let block_text = if let CursorShape::Block = selection.cursor_shape {
915 layout
916 .position_map
917 .snapshot
918 .chars_at(cursor_position)
919 .next()
920 .and_then(|(character, _)| {
921 let font_id =
922 cursor_row_layout.font_for_index(cursor_column)?;
923 let text = character.to_string();
924
925 Some(cx.text_layout_cache().layout_str(
926 &text,
927 cursor_row_layout.font_size(),
928 &[(
929 text.chars().count(),
930 RunStyle {
931 font_id,
932 color: style.background,
933 underline: Default::default(),
934 },
935 )],
936 ))
937 })
938 } else {
939 None
940 };
941
942 let x = cursor_character_x - scroll_left;
943 let y = cursor_position.row() as f32 * layout.position_map.line_height
944 - scroll_top;
945 if selection.is_newest {
946 editor.pixel_position_of_newest_cursor = Some(vec2f(
947 bounds.origin_x() + x + block_width / 2.,
948 bounds.origin_y() + y + layout.position_map.line_height / 2.,
949 ));
950 }
951 cursors.push(Cursor {
952 color: selection_style.cursor,
953 block_width,
954 origin: vec2f(x, y),
955 line_height: layout.position_map.line_height,
956 shape: selection.cursor_shape,
957 block_text,
958 });
959 }
960 }
961 }
962 }
963
964 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
965 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
966 let row = start_row + ix as u32;
967 line_with_invisibles.draw(
968 layout,
969 row,
970 scroll_top,
971 scene,
972 content_origin,
973 scroll_left,
974 visible_text_bounds,
975 whitespace_setting,
976 &invisible_display_ranges,
977 visible_bounds,
978 cx,
979 )
980 }
981 }
982
983 scene.paint_layer(Some(bounds), |scene| {
984 for cursor in cursors {
985 cursor.paint(scene, content_origin, cx);
986 }
987 });
988
989 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
990 scene.push_stacking_context(None, None);
991 let cursor_row_layout =
992 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
993 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
994 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
995 let mut list_origin = content_origin + vec2f(x, y);
996 let list_width = context_menu.size().x();
997 let list_height = context_menu.size().y();
998
999 // Snap the right edge of the list to the right edge of the window if
1000 // its horizontal bounds overflow.
1001 if list_origin.x() + list_width > cx.window_size().x() {
1002 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
1003 }
1004
1005 if list_origin.y() + list_height > bounds.max_y() {
1006 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
1007 }
1008
1009 context_menu.paint(
1010 scene,
1011 list_origin,
1012 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1013 editor,
1014 cx,
1015 );
1016
1017 scene.pop_stacking_context();
1018 }
1019
1020 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
1021 scene.push_stacking_context(None, None);
1022
1023 // This is safe because we check on layout whether the required row is available
1024 let hovered_row_layout =
1025 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1026
1027 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1028 // height. This is the size we will use to decide whether to render popovers above or below
1029 // the hovered line.
1030 let first_size = hover_popovers[0].size();
1031 let height_to_reserve = first_size.y()
1032 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1033
1034 // Compute Hovered Point
1035 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1036 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1037 let hovered_point = content_origin + vec2f(x, y);
1038
1039 if hovered_point.y() - height_to_reserve > 0.0 {
1040 // There is enough space above. Render popovers above the hovered point
1041 let mut current_y = hovered_point.y();
1042 for hover_popover in hover_popovers {
1043 let size = hover_popover.size();
1044 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1045
1046 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1047 if x_out_of_bounds < 0.0 {
1048 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1049 }
1050
1051 hover_popover.paint(
1052 scene,
1053 popover_origin,
1054 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1055 editor,
1056 cx,
1057 );
1058
1059 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1060 }
1061 } else {
1062 // There is not enough space above. Render popovers below the hovered point
1063 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1064 for hover_popover in hover_popovers {
1065 let size = hover_popover.size();
1066 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1067
1068 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1069 if x_out_of_bounds < 0.0 {
1070 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1071 }
1072
1073 hover_popover.paint(
1074 scene,
1075 popover_origin,
1076 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1077 editor,
1078 cx,
1079 );
1080
1081 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1082 }
1083 }
1084
1085 scene.pop_stacking_context();
1086 }
1087
1088 scene.pop_layer();
1089 }
1090
1091 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1092 bounds.max_x() - self.style.theme.scrollbar.width
1093 }
1094
1095 fn paint_scrollbar(
1096 &mut self,
1097 scene: &mut SceneBuilder,
1098 bounds: RectF,
1099 layout: &mut LayoutState,
1100 cx: &mut ViewContext<Editor>,
1101 editor: &Editor,
1102 ) {
1103 enum ScrollbarMouseHandlers {}
1104 if layout.mode != EditorMode::Full {
1105 return;
1106 }
1107
1108 let style = &self.style.theme.scrollbar;
1109
1110 let top = bounds.min_y();
1111 let bottom = bounds.max_y();
1112 let right = bounds.max_x();
1113 let left = self.scrollbar_left(&bounds);
1114 let row_range = &layout.scrollbar_row_range;
1115 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1116
1117 let mut height = bounds.height();
1118 let mut first_row_y_offset = 0.0;
1119
1120 // Impose a minimum height on the scrollbar thumb
1121 let row_height = height / max_row;
1122 let min_thumb_height =
1123 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1124 let thumb_height = (row_range.end - row_range.start) * row_height;
1125 if thumb_height < min_thumb_height {
1126 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1127 height -= min_thumb_height - thumb_height;
1128 }
1129
1130 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1131
1132 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1133 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1134 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1135 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1136
1137 if layout.show_scrollbars {
1138 scene.push_quad(Quad {
1139 bounds: track_bounds,
1140 border: style.track.border,
1141 background: style.track.background_color,
1142 ..Default::default()
1143 });
1144 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1145 let theme = theme::current(cx);
1146 let scrollbar_theme = &theme.editor.scrollbar;
1147 if layout.is_singleton && scrollbar_settings.selections {
1148 let start_anchor = Anchor::min();
1149 let end_anchor = Anchor::max();
1150 let color = scrollbar_theme.selections;
1151 let border = Border {
1152 width: 1.,
1153 color: style.thumb.border.color,
1154 overlay: false,
1155 top: false,
1156 right: true,
1157 bottom: false,
1158 left: true,
1159 };
1160 let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1161 let start_y = y_for_row(start.row() as f32);
1162 let mut end_y = y_for_row(end.row() as f32);
1163 if end_y - start_y < 1. {
1164 end_y = start_y + 1.;
1165 }
1166 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1167
1168 scene.push_quad(Quad {
1169 bounds,
1170 background: Some(color),
1171 border,
1172 corner_radii: style.thumb.corner_radii.into(),
1173 })
1174 };
1175 let background_ranges = editor
1176 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1177 start_anchor..end_anchor,
1178 &layout.position_map.snapshot,
1179 50000,
1180 );
1181 for row in background_ranges {
1182 let start = row.start();
1183 let end = row.end();
1184 push_region(*start, *end);
1185 }
1186 }
1187
1188 if layout.is_singleton && scrollbar_settings.git_diff {
1189 let diff_style = scrollbar_theme.git.clone();
1190 for hunk in layout
1191 .position_map
1192 .snapshot
1193 .buffer_snapshot
1194 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1195 {
1196 let start_display = Point::new(hunk.buffer_range.start, 0)
1197 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1198 let end_display = Point::new(hunk.buffer_range.end, 0)
1199 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1200 let start_y = y_for_row(start_display.row() as f32);
1201 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1202 y_for_row((end_display.row() + 1) as f32)
1203 } else {
1204 y_for_row((end_display.row()) as f32)
1205 };
1206
1207 if end_y - start_y < 1. {
1208 end_y = start_y + 1.;
1209 }
1210 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1211
1212 let color = match hunk.status() {
1213 DiffHunkStatus::Added => diff_style.inserted,
1214 DiffHunkStatus::Modified => diff_style.modified,
1215 DiffHunkStatus::Removed => diff_style.deleted,
1216 };
1217
1218 let border = Border {
1219 width: 1.,
1220 color: style.thumb.border.color,
1221 overlay: false,
1222 top: false,
1223 right: true,
1224 bottom: false,
1225 left: true,
1226 };
1227
1228 scene.push_quad(Quad {
1229 bounds,
1230 background: Some(color),
1231 border,
1232 corner_radii: style.thumb.corner_radii.into(),
1233 })
1234 }
1235 }
1236
1237 scene.push_quad(Quad {
1238 bounds: thumb_bounds,
1239 border: style.thumb.border,
1240 background: style.thumb.background_color,
1241 corner_radii: style.thumb.corner_radii.into(),
1242 });
1243 }
1244
1245 scene.push_cursor_region(CursorRegion {
1246 bounds: track_bounds,
1247 style: CursorStyle::Arrow,
1248 });
1249 scene.push_mouse_region(
1250 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1251 .on_move(move |event, editor: &mut Editor, cx| {
1252 if event.pressed_button.is_none() {
1253 editor.scroll_manager.show_scrollbar(cx);
1254 }
1255 })
1256 .on_down(MouseButton::Left, {
1257 let row_range = row_range.clone();
1258 move |event, editor: &mut Editor, cx| {
1259 let y = event.position.y();
1260 if y < thumb_top || thumb_bottom < y {
1261 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1262 let top_row = center_row
1263 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1264 let mut position = editor.scroll_position(cx);
1265 position.set_y(top_row as f32);
1266 editor.set_scroll_position(position, cx);
1267 } else {
1268 editor.scroll_manager.show_scrollbar(cx);
1269 }
1270 }
1271 })
1272 .on_drag(MouseButton::Left, {
1273 move |event, editor: &mut Editor, cx| {
1274 if event.end {
1275 return;
1276 }
1277
1278 let y = event.prev_mouse_position.y();
1279 let new_y = event.position.y();
1280 if thumb_top < y && y < thumb_bottom {
1281 let mut position = editor.scroll_position(cx);
1282 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1283 if position.y() < 0.0 {
1284 position.set_y(0.);
1285 }
1286 editor.set_scroll_position(position, cx);
1287 }
1288 }
1289 }),
1290 );
1291 }
1292
1293 #[allow(clippy::too_many_arguments)]
1294 fn paint_highlighted_range(
1295 &self,
1296 scene: &mut SceneBuilder,
1297 range: Range<DisplayPoint>,
1298 color: Color,
1299 corner_radius: f32,
1300 line_end_overshoot: f32,
1301 layout: &LayoutState,
1302 content_origin: Vector2F,
1303 scroll_top: f32,
1304 scroll_left: f32,
1305 bounds: RectF,
1306 ) {
1307 let start_row = layout.visible_display_row_range.start;
1308 let end_row = layout.visible_display_row_range.end;
1309 if range.start != range.end {
1310 let row_range = if range.end.column() == 0 {
1311 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1312 } else {
1313 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1314 };
1315
1316 let highlighted_range = HighlightedRange {
1317 color,
1318 line_height: layout.position_map.line_height,
1319 corner_radius,
1320 start_y: content_origin.y()
1321 + row_range.start as f32 * layout.position_map.line_height
1322 - scroll_top,
1323 lines: row_range
1324 .into_iter()
1325 .map(|row| {
1326 let line_layout =
1327 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1328 HighlightedRangeLine {
1329 start_x: if row == range.start.row() {
1330 content_origin.x()
1331 + line_layout.x_for_index(range.start.column() as usize)
1332 - scroll_left
1333 } else {
1334 content_origin.x() - scroll_left
1335 },
1336 end_x: if row == range.end.row() {
1337 content_origin.x()
1338 + line_layout.x_for_index(range.end.column() as usize)
1339 - scroll_left
1340 } else {
1341 content_origin.x() + line_layout.width() + line_end_overshoot
1342 - scroll_left
1343 },
1344 }
1345 })
1346 .collect(),
1347 };
1348
1349 highlighted_range.paint(bounds, scene);
1350 }
1351 }
1352
1353 fn paint_blocks(
1354 &mut self,
1355 scene: &mut SceneBuilder,
1356 bounds: RectF,
1357 visible_bounds: RectF,
1358 layout: &mut LayoutState,
1359 editor: &mut Editor,
1360 cx: &mut PaintContext<Editor>,
1361 ) {
1362 let scroll_position = layout.position_map.snapshot.scroll_position();
1363 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1364 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1365
1366 for block in &mut layout.blocks {
1367 let mut origin = bounds.origin()
1368 + vec2f(
1369 0.,
1370 block.row as f32 * layout.position_map.line_height - scroll_top,
1371 );
1372 if !matches!(block.style, BlockStyle::Sticky) {
1373 origin += vec2f(-scroll_left, 0.);
1374 }
1375 block
1376 .element
1377 .paint(scene, origin, visible_bounds, editor, cx);
1378 }
1379 }
1380
1381 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1382 let style = &self.style;
1383
1384 cx.text_layout_cache()
1385 .layout_str(
1386 " ".repeat(column).as_str(),
1387 style.text.font_size,
1388 &[(
1389 column,
1390 RunStyle {
1391 font_id: style.text.font_id,
1392 color: Color::black(),
1393 underline: Default::default(),
1394 },
1395 )],
1396 )
1397 .width()
1398 }
1399
1400 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1401 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1402 self.column_pixels(digit_count, cx)
1403 }
1404
1405 //Folds contained in a hunk are ignored apart from shrinking visual size
1406 //If a fold contains any hunks then that fold line is marked as modified
1407 fn layout_git_gutters(
1408 &self,
1409 display_rows: Range<u32>,
1410 snapshot: &EditorSnapshot,
1411 ) -> Vec<DisplayDiffHunk> {
1412 let buffer_snapshot = &snapshot.buffer_snapshot;
1413
1414 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1415 .to_point(snapshot)
1416 .row;
1417 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1418 .to_point(snapshot)
1419 .row;
1420
1421 buffer_snapshot
1422 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1423 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1424 .dedup()
1425 .collect()
1426 }
1427
1428 fn layout_line_numbers(
1429 &self,
1430 rows: Range<u32>,
1431 active_rows: &BTreeMap<u32, bool>,
1432 is_singleton: bool,
1433 snapshot: &EditorSnapshot,
1434 cx: &ViewContext<Editor>,
1435 ) -> (
1436 Vec<Option<text_layout::Line>>,
1437 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1438 ) {
1439 let style = &self.style;
1440 let include_line_numbers = snapshot.mode == EditorMode::Full;
1441 let mut line_number_layouts = Vec::with_capacity(rows.len());
1442 let mut fold_statuses = Vec::with_capacity(rows.len());
1443 let mut line_number = String::new();
1444 for (ix, row) in snapshot
1445 .buffer_rows(rows.start)
1446 .take((rows.end - rows.start) as usize)
1447 .enumerate()
1448 {
1449 let display_row = rows.start + ix as u32;
1450 let (active, color) = if active_rows.contains_key(&display_row) {
1451 (true, style.line_number_active)
1452 } else {
1453 (false, style.line_number)
1454 };
1455 if let Some(buffer_row) = row {
1456 if include_line_numbers {
1457 line_number.clear();
1458 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1459 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1460 &line_number,
1461 style.text.font_size,
1462 &[(
1463 line_number.len(),
1464 RunStyle {
1465 font_id: style.text.font_id,
1466 color,
1467 underline: Default::default(),
1468 },
1469 )],
1470 )));
1471 fold_statuses.push(
1472 is_singleton
1473 .then(|| {
1474 snapshot
1475 .fold_for_line(buffer_row)
1476 .map(|fold_status| (fold_status, buffer_row, active))
1477 })
1478 .flatten(),
1479 )
1480 }
1481 } else {
1482 fold_statuses.push(None);
1483 line_number_layouts.push(None);
1484 }
1485 }
1486
1487 (line_number_layouts, fold_statuses)
1488 }
1489
1490 fn layout_lines(
1491 &mut self,
1492 rows: Range<u32>,
1493 line_number_layouts: &[Option<Line>],
1494 snapshot: &EditorSnapshot,
1495 cx: &ViewContext<Editor>,
1496 ) -> Vec<LineWithInvisibles> {
1497 if rows.start >= rows.end {
1498 return Vec::new();
1499 }
1500
1501 // When the editor is empty and unfocused, then show the placeholder.
1502 if snapshot.is_empty() {
1503 let placeholder_style = self
1504 .style
1505 .placeholder_text
1506 .as_ref()
1507 .unwrap_or(&self.style.text);
1508 let placeholder_text = snapshot.placeholder_text();
1509 let placeholder_lines = placeholder_text
1510 .as_ref()
1511 .map_or("", AsRef::as_ref)
1512 .split('\n')
1513 .skip(rows.start as usize)
1514 .chain(iter::repeat(""))
1515 .take(rows.len());
1516 placeholder_lines
1517 .map(|line| {
1518 cx.text_layout_cache().layout_str(
1519 line,
1520 placeholder_style.font_size,
1521 &[(
1522 line.len(),
1523 RunStyle {
1524 font_id: placeholder_style.font_id,
1525 color: placeholder_style.color,
1526 underline: Default::default(),
1527 },
1528 )],
1529 )
1530 })
1531 .map(|line| LineWithInvisibles {
1532 line,
1533 invisibles: Vec::new(),
1534 })
1535 .collect()
1536 } else {
1537 let style = &self.style;
1538 let chunks = snapshot
1539 .chunks(
1540 rows.clone(),
1541 true,
1542 Some(style.theme.hint),
1543 Some(style.theme.suggestion),
1544 )
1545 .map(|chunk| {
1546 let mut highlight_style = chunk
1547 .syntax_highlight_id
1548 .and_then(|id| id.style(&style.syntax));
1549
1550 if let Some(chunk_highlight) = chunk.highlight_style {
1551 if let Some(highlight_style) = highlight_style.as_mut() {
1552 highlight_style.highlight(chunk_highlight);
1553 } else {
1554 highlight_style = Some(chunk_highlight);
1555 }
1556 }
1557
1558 let mut diagnostic_highlight = HighlightStyle::default();
1559
1560 if chunk.is_unnecessary {
1561 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1562 }
1563
1564 if let Some(severity) = chunk.diagnostic_severity {
1565 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1566 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1567 let diagnostic_style = super::diagnostic_style(severity, true, style);
1568 diagnostic_highlight.underline = Some(Underline {
1569 color: Some(diagnostic_style.message.text.color),
1570 thickness: 1.0.into(),
1571 squiggly: true,
1572 });
1573 }
1574 }
1575
1576 if let Some(highlight_style) = highlight_style.as_mut() {
1577 highlight_style.highlight(diagnostic_highlight);
1578 } else {
1579 highlight_style = Some(diagnostic_highlight);
1580 }
1581
1582 HighlightedChunk {
1583 chunk: chunk.text,
1584 style: highlight_style,
1585 is_tab: chunk.is_tab,
1586 }
1587 });
1588
1589 LineWithInvisibles::from_chunks(
1590 chunks,
1591 &style.text,
1592 cx.text_layout_cache(),
1593 cx.font_cache(),
1594 MAX_LINE_LEN,
1595 rows.len() as usize,
1596 line_number_layouts,
1597 snapshot.mode,
1598 )
1599 }
1600 }
1601
1602 #[allow(clippy::too_many_arguments)]
1603 fn layout_blocks(
1604 &mut self,
1605 rows: Range<u32>,
1606 snapshot: &EditorSnapshot,
1607 editor_width: f32,
1608 scroll_width: f32,
1609 gutter_padding: f32,
1610 gutter_width: f32,
1611 em_width: f32,
1612 text_x: f32,
1613 line_height: f32,
1614 style: &EditorStyle,
1615 line_layouts: &[LineWithInvisibles],
1616 editor: &mut Editor,
1617 cx: &mut LayoutContext<Editor>,
1618 ) -> (f32, Vec<BlockLayout>) {
1619 let mut block_id = 0;
1620 let scroll_x = snapshot.scroll_anchor.offset.x();
1621 let (fixed_blocks, non_fixed_blocks) = snapshot
1622 .blocks_in_range(rows.clone())
1623 .partition::<Vec<_>, _>(|(_, block)| match block {
1624 TransformBlock::ExcerptHeader { .. } => false,
1625 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1626 });
1627 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1628 let mut element = match block {
1629 TransformBlock::Custom(block) => {
1630 let align_to = block
1631 .position()
1632 .to_point(&snapshot.buffer_snapshot)
1633 .to_display_point(snapshot);
1634 let anchor_x = text_x
1635 + if rows.contains(&align_to.row()) {
1636 line_layouts[(align_to.row() - rows.start) as usize]
1637 .line
1638 .x_for_index(align_to.column() as usize)
1639 } else {
1640 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1641 .x_for_index(align_to.column() as usize)
1642 };
1643
1644 block.render(&mut BlockContext {
1645 view_context: cx,
1646 anchor_x,
1647 gutter_padding,
1648 line_height,
1649 scroll_x,
1650 gutter_width,
1651 em_width,
1652 block_id,
1653 })
1654 }
1655 TransformBlock::ExcerptHeader {
1656 id,
1657 buffer,
1658 range,
1659 starts_new_buffer,
1660 ..
1661 } => {
1662 let tooltip_style = theme::current(cx).tooltip.clone();
1663 let include_root = editor
1664 .project
1665 .as_ref()
1666 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1667 .unwrap_or_default();
1668 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1669 let jump_path = ProjectPath {
1670 worktree_id: file.worktree_id(cx),
1671 path: file.path.clone(),
1672 };
1673 let jump_anchor = range
1674 .primary
1675 .as_ref()
1676 .map_or(range.context.start, |primary| primary.start);
1677 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1678
1679 enum JumpIcon {}
1680 MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
1681 let style = style.jump_icon.style_for(state);
1682 Svg::new("icons/arrow_up_right_8.svg")
1683 .with_color(style.color)
1684 .constrained()
1685 .with_width(style.icon_width)
1686 .aligned()
1687 .contained()
1688 .with_style(style.container)
1689 .constrained()
1690 .with_width(style.button_width)
1691 .with_height(style.button_width)
1692 })
1693 .with_cursor_style(CursorStyle::PointingHand)
1694 .on_click(MouseButton::Left, move |_, editor, cx| {
1695 if let Some(workspace) = editor
1696 .workspace
1697 .as_ref()
1698 .and_then(|(workspace, _)| workspace.upgrade(cx))
1699 {
1700 workspace.update(cx, |workspace, cx| {
1701 Editor::jump(
1702 workspace,
1703 jump_path.clone(),
1704 jump_position,
1705 jump_anchor,
1706 cx,
1707 );
1708 });
1709 }
1710 })
1711 .with_tooltip::<JumpIcon>(
1712 (*id).into(),
1713 "Jump to Buffer".to_string(),
1714 Some(Box::new(crate::OpenExcerpts)),
1715 tooltip_style.clone(),
1716 cx,
1717 )
1718 .aligned()
1719 .flex_float()
1720 });
1721
1722 if *starts_new_buffer {
1723 let editor_font_size = style.text.font_size;
1724 let style = &style.diagnostic_path_header;
1725 let font_size = (style.text_scale_factor * editor_font_size).round();
1726
1727 let path = buffer.resolve_file_path(cx, include_root);
1728 let mut filename = None;
1729 let mut parent_path = None;
1730 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1731 if let Some(path) = path {
1732 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1733 parent_path =
1734 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1735 }
1736
1737 Flex::row()
1738 .with_child(
1739 Label::new(
1740 filename.unwrap_or_else(|| "untitled".to_string()),
1741 style.filename.text.clone().with_font_size(font_size),
1742 )
1743 .contained()
1744 .with_style(style.filename.container)
1745 .aligned(),
1746 )
1747 .with_children(parent_path.map(|path| {
1748 Label::new(path, style.path.text.clone().with_font_size(font_size))
1749 .contained()
1750 .with_style(style.path.container)
1751 .aligned()
1752 }))
1753 .with_children(jump_icon)
1754 .contained()
1755 .with_style(style.container)
1756 .with_padding_left(gutter_padding)
1757 .with_padding_right(gutter_padding)
1758 .expanded()
1759 .into_any_named("path header block")
1760 } else {
1761 let text_style = style.text.clone();
1762 Flex::row()
1763 .with_child(Label::new("⋯", text_style))
1764 .with_children(jump_icon)
1765 .contained()
1766 .with_padding_left(gutter_padding)
1767 .with_padding_right(gutter_padding)
1768 .expanded()
1769 .into_any_named("collapsed context")
1770 }
1771 }
1772 };
1773
1774 element.layout(
1775 SizeConstraint {
1776 min: Vector2F::zero(),
1777 max: vec2f(width, block.height() as f32 * line_height),
1778 },
1779 editor,
1780 cx,
1781 );
1782 element
1783 };
1784
1785 let mut fixed_block_max_width = 0f32;
1786 let mut blocks = Vec::new();
1787 for (row, block) in fixed_blocks {
1788 let element = render_block(block, f32::INFINITY, block_id);
1789 block_id += 1;
1790 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1791 blocks.push(BlockLayout {
1792 row,
1793 element,
1794 style: BlockStyle::Fixed,
1795 });
1796 }
1797 for (row, block) in non_fixed_blocks {
1798 let style = match block {
1799 TransformBlock::Custom(block) => block.style(),
1800 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1801 };
1802 let width = match style {
1803 BlockStyle::Sticky => editor_width,
1804 BlockStyle::Flex => editor_width
1805 .max(fixed_block_max_width)
1806 .max(gutter_width + scroll_width),
1807 BlockStyle::Fixed => unreachable!(),
1808 };
1809 let element = render_block(block, width, block_id);
1810 block_id += 1;
1811 blocks.push(BlockLayout {
1812 row,
1813 element,
1814 style,
1815 });
1816 }
1817 (
1818 scroll_width.max(fixed_block_max_width - gutter_width),
1819 blocks,
1820 )
1821 }
1822}
1823
1824// TODO kb implement
1825fn update_inlay_link_and_hover_points(
1826 position_map: &PositionMap,
1827 point_for_position: PointForPosition,
1828 editor: &mut Editor,
1829 cx: &mut ViewContext<'_, '_, Editor>,
1830) {
1831 let hint_start_offset = position_map
1832 .snapshot
1833 .display_point_to_inlay_offset(point_for_position.previous_valid, Bias::Left);
1834 let hint_end_offset = position_map
1835 .snapshot
1836 .display_point_to_inlay_offset(point_for_position.next_valid, Bias::Right);
1837 let offset_overshoot = point_for_position.column_overshoot_after_line_end as usize;
1838 let hovered_offset = if offset_overshoot == 0 {
1839 Some(
1840 position_map
1841 .snapshot
1842 .display_point_to_inlay_offset(point_for_position.exact_unclipped, Bias::Left),
1843 )
1844 } else if (hint_end_offset - hint_start_offset).0 >= offset_overshoot {
1845 Some(InlayOffset(hint_start_offset.0 + offset_overshoot))
1846 } else {
1847 None
1848 };
1849 if let Some(hovered_offset) = hovered_offset {
1850 let buffer = editor.buffer().read(cx);
1851 let snapshot = buffer.snapshot(cx);
1852 let previous_valid_anchor = snapshot.anchor_at(
1853 point_for_position
1854 .previous_valid
1855 .to_point(&position_map.snapshot.display_snapshot),
1856 Bias::Left,
1857 );
1858 let next_valid_anchor = snapshot.anchor_at(
1859 point_for_position
1860 .next_valid
1861 .to_point(&position_map.snapshot.display_snapshot),
1862 Bias::Right,
1863 );
1864 if let Some(hovered_hint) = editor
1865 .visible_inlay_hints(cx)
1866 .into_iter()
1867 .skip_while(|hint| hint.position.cmp(&previous_valid_anchor, &snapshot).is_lt())
1868 .take_while(|hint| hint.position.cmp(&next_valid_anchor, &snapshot).is_le())
1869 .max_by_key(|hint| hint.id)
1870 {
1871 let inlay_hint_cache = editor.inlay_hint_cache();
1872 if let Some(cached_hint) =
1873 inlay_hint_cache.hint_by_id(previous_valid_anchor.excerpt_id, hovered_hint.id)
1874 {
1875 match &cached_hint.resolve_state {
1876 ResolveState::CanResolve(_, _) => {
1877 if let Some(buffer_id) = previous_valid_anchor.buffer_id {
1878 inlay_hint_cache.spawn_hint_resolve(
1879 buffer_id,
1880 previous_valid_anchor.excerpt_id,
1881 hovered_hint.id,
1882 cx,
1883 );
1884 }
1885 }
1886 ResolveState::Resolved => {
1887 match &cached_hint.label {
1888 project::InlayHintLabel::String(_) => {
1889 if cached_hint.tooltip.is_some() {
1890 dbg!(&cached_hint.tooltip); // TODO kb
1891 // hover_at_point = Some(hovered_offset);
1892 }
1893 }
1894 project::InlayHintLabel::LabelParts(label_parts) => {
1895 if let Some(hovered_hint_part) = find_hovered_hint_part(
1896 &label_parts,
1897 hint_start_offset..hint_end_offset,
1898 hovered_offset,
1899 ) {
1900 if hovered_hint_part.tooltip.is_some() {
1901 dbg!(&hovered_hint_part.tooltip); // TODO kb
1902 // hover_at_point = Some(hovered_offset);
1903 }
1904 if let Some(location) = &hovered_hint_part.location {
1905 dbg!(location); // TODO kb
1906 // go_to_definition_point = Some(location);
1907 }
1908 }
1909 }
1910 };
1911 }
1912 ResolveState::Resolving => {}
1913 }
1914 }
1915 }
1916 }
1917}
1918
1919fn find_hovered_hint_part<'a>(
1920 label_parts: &'a [InlayHintLabelPart],
1921 hint_range: Range<InlayOffset>,
1922 hovered_offset: InlayOffset,
1923) -> Option<&'a InlayHintLabelPart> {
1924 if hovered_offset >= hint_range.start && hovered_offset <= hint_range.end {
1925 let mut hovered_character = (hovered_offset - hint_range.start).0;
1926 for part in label_parts {
1927 let part_len = part.value.chars().count();
1928 if hovered_character >= part_len {
1929 hovered_character -= part_len;
1930 } else {
1931 return Some(part);
1932 }
1933 }
1934 }
1935 None
1936}
1937
1938struct HighlightedChunk<'a> {
1939 chunk: &'a str,
1940 style: Option<HighlightStyle>,
1941 is_tab: bool,
1942}
1943
1944#[derive(Debug)]
1945pub struct LineWithInvisibles {
1946 pub line: Line,
1947 invisibles: Vec<Invisible>,
1948}
1949
1950impl LineWithInvisibles {
1951 fn from_chunks<'a>(
1952 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1953 text_style: &TextStyle,
1954 text_layout_cache: &TextLayoutCache,
1955 font_cache: &Arc<FontCache>,
1956 max_line_len: usize,
1957 max_line_count: usize,
1958 line_number_layouts: &[Option<Line>],
1959 editor_mode: EditorMode,
1960 ) -> Vec<Self> {
1961 let mut layouts = Vec::with_capacity(max_line_count);
1962 let mut line = String::new();
1963 let mut invisibles = Vec::new();
1964 let mut styles = Vec::new();
1965 let mut non_whitespace_added = false;
1966 let mut row = 0;
1967 let mut line_exceeded_max_len = false;
1968 for highlighted_chunk in chunks.chain([HighlightedChunk {
1969 chunk: "\n",
1970 style: None,
1971 is_tab: false,
1972 }]) {
1973 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1974 if ix > 0 {
1975 layouts.push(Self {
1976 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1977 invisibles: invisibles.drain(..).collect(),
1978 });
1979
1980 line.clear();
1981 styles.clear();
1982 row += 1;
1983 line_exceeded_max_len = false;
1984 non_whitespace_added = false;
1985 if row == max_line_count {
1986 return layouts;
1987 }
1988 }
1989
1990 if !line_chunk.is_empty() && !line_exceeded_max_len {
1991 let text_style = if let Some(style) = highlighted_chunk.style {
1992 text_style
1993 .clone()
1994 .highlight(style, font_cache)
1995 .map(Cow::Owned)
1996 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1997 } else {
1998 Cow::Borrowed(text_style)
1999 };
2000
2001 if line.len() + line_chunk.len() > max_line_len {
2002 let mut chunk_len = max_line_len - line.len();
2003 while !line_chunk.is_char_boundary(chunk_len) {
2004 chunk_len -= 1;
2005 }
2006 line_chunk = &line_chunk[..chunk_len];
2007 line_exceeded_max_len = true;
2008 }
2009
2010 styles.push((
2011 line_chunk.len(),
2012 RunStyle {
2013 font_id: text_style.font_id,
2014 color: text_style.color,
2015 underline: text_style.underline,
2016 },
2017 ));
2018
2019 if editor_mode == EditorMode::Full {
2020 // Line wrap pads its contents with fake whitespaces,
2021 // avoid printing them
2022 let inside_wrapped_string = line_number_layouts
2023 .get(row)
2024 .and_then(|layout| layout.as_ref())
2025 .is_none();
2026 if highlighted_chunk.is_tab {
2027 if non_whitespace_added || !inside_wrapped_string {
2028 invisibles.push(Invisible::Tab {
2029 line_start_offset: line.len(),
2030 });
2031 }
2032 } else {
2033 invisibles.extend(
2034 line_chunk
2035 .chars()
2036 .enumerate()
2037 .filter(|(_, line_char)| {
2038 let is_whitespace = line_char.is_whitespace();
2039 non_whitespace_added |= !is_whitespace;
2040 is_whitespace
2041 && (non_whitespace_added || !inside_wrapped_string)
2042 })
2043 .map(|(whitespace_index, _)| Invisible::Whitespace {
2044 line_offset: line.len() + whitespace_index,
2045 }),
2046 )
2047 }
2048 }
2049
2050 line.push_str(line_chunk);
2051 }
2052 }
2053 }
2054
2055 layouts
2056 }
2057
2058 fn draw(
2059 &self,
2060 layout: &LayoutState,
2061 row: u32,
2062 scroll_top: f32,
2063 scene: &mut SceneBuilder,
2064 content_origin: Vector2F,
2065 scroll_left: f32,
2066 visible_text_bounds: RectF,
2067 whitespace_setting: ShowWhitespaceSetting,
2068 selection_ranges: &[Range<DisplayPoint>],
2069 visible_bounds: RectF,
2070 cx: &mut ViewContext<Editor>,
2071 ) {
2072 let line_height = layout.position_map.line_height;
2073 let line_y = row as f32 * line_height - scroll_top;
2074
2075 self.line.paint(
2076 scene,
2077 content_origin + vec2f(-scroll_left, line_y),
2078 visible_text_bounds,
2079 line_height,
2080 cx,
2081 );
2082
2083 self.draw_invisibles(
2084 &selection_ranges,
2085 layout,
2086 content_origin,
2087 scroll_left,
2088 line_y,
2089 row,
2090 scene,
2091 visible_bounds,
2092 line_height,
2093 whitespace_setting,
2094 cx,
2095 );
2096 }
2097
2098 fn draw_invisibles(
2099 &self,
2100 selection_ranges: &[Range<DisplayPoint>],
2101 layout: &LayoutState,
2102 content_origin: Vector2F,
2103 scroll_left: f32,
2104 line_y: f32,
2105 row: u32,
2106 scene: &mut SceneBuilder,
2107 visible_bounds: RectF,
2108 line_height: f32,
2109 whitespace_setting: ShowWhitespaceSetting,
2110 cx: &mut ViewContext<Editor>,
2111 ) {
2112 let allowed_invisibles_regions = match whitespace_setting {
2113 ShowWhitespaceSetting::None => return,
2114 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2115 ShowWhitespaceSetting::All => None,
2116 };
2117
2118 for invisible in &self.invisibles {
2119 let (&token_offset, invisible_symbol) = match invisible {
2120 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2121 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2122 };
2123
2124 let x_offset = self.line.x_for_index(token_offset);
2125 let invisible_offset =
2126 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2127 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2128
2129 if let Some(allowed_regions) = allowed_invisibles_regions {
2130 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2131 if !allowed_regions
2132 .iter()
2133 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2134 {
2135 continue;
2136 }
2137 }
2138 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
2139 }
2140 }
2141}
2142
2143#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2144enum Invisible {
2145 Tab { line_start_offset: usize },
2146 Whitespace { line_offset: usize },
2147}
2148
2149impl Element<Editor> for EditorElement {
2150 type LayoutState = LayoutState;
2151 type PaintState = ();
2152
2153 fn layout(
2154 &mut self,
2155 constraint: SizeConstraint,
2156 editor: &mut Editor,
2157 cx: &mut LayoutContext<Editor>,
2158 ) -> (Vector2F, Self::LayoutState) {
2159 let mut size = constraint.max;
2160 if size.x().is_infinite() {
2161 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2162 }
2163
2164 let snapshot = editor.snapshot(cx);
2165 let style = self.style.clone();
2166
2167 let line_height = (style.text.font_size * style.line_height_scalar).round();
2168
2169 let gutter_padding;
2170 let gutter_width;
2171 let gutter_margin;
2172 if snapshot.show_gutter {
2173 let em_width = style.text.em_width(cx.font_cache());
2174 gutter_padding = (em_width * style.gutter_padding_factor).round();
2175 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2176 gutter_margin = -style.text.descent(cx.font_cache());
2177 } else {
2178 gutter_padding = 0.0;
2179 gutter_width = 0.0;
2180 gutter_margin = 0.0;
2181 };
2182
2183 let text_width = size.x() - gutter_width;
2184 let em_width = style.text.em_width(cx.font_cache());
2185 let em_advance = style.text.em_advance(cx.font_cache());
2186 let overscroll = vec2f(em_width, 0.);
2187 let snapshot = {
2188 editor.set_visible_line_count(size.y() / line_height, cx);
2189
2190 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2191 let wrap_width = match editor.soft_wrap_mode(cx) {
2192 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2193 SoftWrap::EditorWidth => editor_width,
2194 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2195 };
2196
2197 if editor.set_wrap_width(Some(wrap_width), cx) {
2198 editor.snapshot(cx)
2199 } else {
2200 snapshot
2201 }
2202 };
2203
2204 let wrap_guides = editor
2205 .wrap_guides(cx)
2206 .iter()
2207 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2208 .collect();
2209
2210 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2211 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2212 size.set_y(
2213 scroll_height
2214 .min(constraint.max_along(Axis::Vertical))
2215 .max(constraint.min_along(Axis::Vertical))
2216 .min(line_height * max_lines as f32),
2217 )
2218 } else if let EditorMode::SingleLine = snapshot.mode {
2219 size.set_y(
2220 line_height
2221 .min(constraint.max_along(Axis::Vertical))
2222 .max(constraint.min_along(Axis::Vertical)),
2223 )
2224 } else if size.y().is_infinite() {
2225 size.set_y(scroll_height);
2226 }
2227 let gutter_size = vec2f(gutter_width, size.y());
2228 let text_size = vec2f(text_width, size.y());
2229
2230 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2231 let mut snapshot = editor.snapshot(cx);
2232
2233 let scroll_position = snapshot.scroll_position();
2234 // The scroll position is a fractional point, the whole number of which represents
2235 // the top of the window in terms of display rows.
2236 let start_row = scroll_position.y() as u32;
2237 let height_in_lines = size.y() / line_height;
2238 let max_row = snapshot.max_point().row();
2239
2240 // Add 1 to ensure selections bleed off screen
2241 let end_row = 1 + cmp::min(
2242 (scroll_position.y() + height_in_lines).ceil() as u32,
2243 max_row,
2244 );
2245
2246 let start_anchor = if start_row == 0 {
2247 Anchor::min()
2248 } else {
2249 snapshot
2250 .buffer_snapshot
2251 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2252 };
2253 let end_anchor = if end_row > max_row {
2254 Anchor::max()
2255 } else {
2256 snapshot
2257 .buffer_snapshot
2258 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2259 };
2260
2261 let mut selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)> = Vec::new();
2262 let mut active_rows = BTreeMap::new();
2263 let mut fold_ranges = Vec::new();
2264 let is_singleton = editor.is_singleton(cx);
2265
2266 let highlighted_rows = editor.highlighted_rows();
2267 let theme = theme::current(cx);
2268 let highlighted_ranges = editor.background_highlights_in_range(
2269 start_anchor..end_anchor,
2270 &snapshot.display_snapshot,
2271 theme.as_ref(),
2272 );
2273
2274 fold_ranges.extend(
2275 snapshot
2276 .folds_in_range(start_anchor..end_anchor)
2277 .map(|anchor| {
2278 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2279 (
2280 start.row,
2281 start.to_display_point(&snapshot.display_snapshot)
2282 ..anchor.end.to_display_point(&snapshot),
2283 )
2284 }),
2285 );
2286
2287 let mut remote_selections = HashMap::default();
2288 for (replica_id, line_mode, cursor_shape, selection) in snapshot
2289 .buffer_snapshot
2290 .remote_selections_in_range(&(start_anchor..end_anchor))
2291 {
2292 let replica_id = if let Some(mapping) = &editor.replica_id_mapping {
2293 mapping.get(&replica_id).copied()
2294 } else {
2295 None
2296 };
2297
2298 // The local selections match the leader's selections.
2299 if replica_id.is_some() && replica_id == editor.leader_replica_id {
2300 continue;
2301 }
2302 remote_selections
2303 .entry(replica_id)
2304 .or_insert(Vec::new())
2305 .push(SelectionLayout::new(
2306 selection,
2307 line_mode,
2308 cursor_shape,
2309 &snapshot.display_snapshot,
2310 false,
2311 false,
2312 ));
2313 }
2314 selections.extend(remote_selections);
2315
2316 let mut newest_selection_head = None;
2317
2318 if editor.show_local_selections {
2319 let mut local_selections: Vec<Selection<Point>> = editor
2320 .selections
2321 .disjoint_in_range(start_anchor..end_anchor, cx);
2322 local_selections.extend(editor.selections.pending(cx));
2323 let mut layouts = Vec::new();
2324 let newest = editor.selections.newest(cx);
2325 for selection in local_selections.drain(..) {
2326 let is_empty = selection.start == selection.end;
2327 let is_newest = selection == newest;
2328
2329 let layout = SelectionLayout::new(
2330 selection,
2331 editor.selections.line_mode,
2332 editor.cursor_shape,
2333 &snapshot.display_snapshot,
2334 is_newest,
2335 true,
2336 );
2337 if is_newest {
2338 newest_selection_head = Some(layout.head);
2339 }
2340
2341 for row in cmp::max(layout.active_rows.start, start_row)
2342 ..=cmp::min(layout.active_rows.end, end_row)
2343 {
2344 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2345 *contains_non_empty_selection |= !is_empty;
2346 }
2347 layouts.push(layout);
2348 }
2349
2350 // Render the local selections in the leader's color when following.
2351 let local_replica_id = if let Some(leader_replica_id) = editor.leader_replica_id {
2352 leader_replica_id
2353 } else {
2354 let replica_id = editor.replica_id(cx);
2355 if let Some(mapping) = &editor.replica_id_mapping {
2356 mapping.get(&replica_id).copied().unwrap_or(replica_id)
2357 } else {
2358 replica_id
2359 }
2360 };
2361
2362 selections.push((Some(local_replica_id), layouts));
2363 }
2364
2365 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2366 let show_scrollbars = match scrollbar_settings.show {
2367 ShowScrollbar::Auto => {
2368 // Git
2369 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2370 ||
2371 // Selections
2372 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2373 // Scrollmanager
2374 || editor.scroll_manager.scrollbars_visible()
2375 }
2376 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2377 ShowScrollbar::Always => true,
2378 ShowScrollbar::Never => false,
2379 };
2380
2381 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2382 .into_iter()
2383 .map(|(id, fold)| {
2384 let color = self
2385 .style
2386 .folds
2387 .ellipses
2388 .background
2389 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2390 .color;
2391
2392 (id, fold, color)
2393 })
2394 .collect();
2395
2396 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2397 start_row..end_row,
2398 &active_rows,
2399 is_singleton,
2400 &snapshot,
2401 cx,
2402 );
2403
2404 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2405
2406 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2407
2408 let mut max_visible_line_width = 0.0;
2409 let line_layouts =
2410 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2411 for line_with_invisibles in &line_layouts {
2412 if line_with_invisibles.line.width() > max_visible_line_width {
2413 max_visible_line_width = line_with_invisibles.line.width();
2414 }
2415 }
2416
2417 let style = self.style.clone();
2418 let longest_line_width = layout_line(
2419 snapshot.longest_row(),
2420 &snapshot,
2421 &style,
2422 cx.text_layout_cache(),
2423 )
2424 .width();
2425 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2426 let em_width = style.text.em_width(cx.font_cache());
2427 let (scroll_width, blocks) = self.layout_blocks(
2428 start_row..end_row,
2429 &snapshot,
2430 size.x(),
2431 scroll_width,
2432 gutter_padding,
2433 gutter_width,
2434 em_width,
2435 gutter_width + gutter_margin,
2436 line_height,
2437 &style,
2438 &line_layouts,
2439 editor,
2440 cx,
2441 );
2442
2443 let scroll_max = vec2f(
2444 ((scroll_width - text_size.x()) / em_width).max(0.0),
2445 max_row as f32,
2446 );
2447
2448 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2449
2450 let autoscrolled = if autoscroll_horizontally {
2451 editor.autoscroll_horizontally(
2452 start_row,
2453 text_size.x(),
2454 scroll_width,
2455 em_width,
2456 &line_layouts,
2457 cx,
2458 )
2459 } else {
2460 false
2461 };
2462
2463 if clamped || autoscrolled {
2464 snapshot = editor.snapshot(cx);
2465 }
2466
2467 let style = editor.style(cx);
2468
2469 let mut context_menu = None;
2470 let mut code_actions_indicator = None;
2471 if let Some(newest_selection_head) = newest_selection_head {
2472 if (start_row..end_row).contains(&newest_selection_head.row()) {
2473 if editor.context_menu_visible() {
2474 context_menu =
2475 editor.render_context_menu(newest_selection_head, style.clone(), cx);
2476 }
2477
2478 let active = matches!(
2479 editor.context_menu,
2480 Some(crate::ContextMenu::CodeActions(_))
2481 );
2482
2483 code_actions_indicator = editor
2484 .render_code_actions_indicator(&style, active, cx)
2485 .map(|indicator| (newest_selection_head.row(), indicator));
2486 }
2487 }
2488
2489 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2490 let mut hover = editor
2491 .hover_state
2492 .render(&snapshot, &style, visible_rows, cx);
2493 let mode = editor.mode;
2494
2495 let mut fold_indicators = editor.render_fold_indicators(
2496 fold_statuses,
2497 &style,
2498 editor.gutter_hovered,
2499 line_height,
2500 gutter_margin,
2501 cx,
2502 );
2503
2504 if let Some((_, context_menu)) = context_menu.as_mut() {
2505 context_menu.layout(
2506 SizeConstraint {
2507 min: Vector2F::zero(),
2508 max: vec2f(
2509 cx.window_size().x() * 0.7,
2510 (12. * line_height).min((size.y() - line_height) / 2.),
2511 ),
2512 },
2513 editor,
2514 cx,
2515 );
2516 }
2517
2518 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2519 indicator.layout(
2520 SizeConstraint::strict_along(
2521 Axis::Vertical,
2522 line_height * style.code_actions.vertical_scale,
2523 ),
2524 editor,
2525 cx,
2526 );
2527 }
2528
2529 for fold_indicator in fold_indicators.iter_mut() {
2530 if let Some(indicator) = fold_indicator.as_mut() {
2531 indicator.layout(
2532 SizeConstraint::strict_along(
2533 Axis::Vertical,
2534 line_height * style.code_actions.vertical_scale,
2535 ),
2536 editor,
2537 cx,
2538 );
2539 }
2540 }
2541
2542 if let Some((_, hover_popovers)) = hover.as_mut() {
2543 for hover_popover in hover_popovers.iter_mut() {
2544 hover_popover.layout(
2545 SizeConstraint {
2546 min: Vector2F::zero(),
2547 max: vec2f(
2548 (120. * em_width) // Default size
2549 .min(size.x() / 2.) // Shrink to half of the editor width
2550 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2551 (16. * line_height) // Default size
2552 .min(size.y() / 2.) // Shrink to half of the editor height
2553 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2554 ),
2555 },
2556 editor,
2557 cx,
2558 );
2559 }
2560 }
2561
2562 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2563 let invisible_symbol_style = RunStyle {
2564 color: self.style.whitespace,
2565 font_id: self.style.text.font_id,
2566 underline: Default::default(),
2567 };
2568
2569 (
2570 size,
2571 LayoutState {
2572 mode,
2573 position_map: Arc::new(PositionMap {
2574 size,
2575 scroll_max,
2576 line_layouts,
2577 line_height,
2578 em_width,
2579 em_advance,
2580 snapshot,
2581 }),
2582 visible_display_row_range: start_row..end_row,
2583 wrap_guides,
2584 gutter_size,
2585 gutter_padding,
2586 text_size,
2587 scrollbar_row_range,
2588 show_scrollbars,
2589 is_singleton,
2590 max_row,
2591 gutter_margin,
2592 active_rows,
2593 highlighted_rows,
2594 highlighted_ranges,
2595 fold_ranges,
2596 line_number_layouts,
2597 display_hunks,
2598 blocks,
2599 selections,
2600 context_menu,
2601 code_actions_indicator,
2602 fold_indicators,
2603 tab_invisible: cx.text_layout_cache().layout_str(
2604 "→",
2605 invisible_symbol_font_size,
2606 &[("→".len(), invisible_symbol_style)],
2607 ),
2608 space_invisible: cx.text_layout_cache().layout_str(
2609 "•",
2610 invisible_symbol_font_size,
2611 &[("•".len(), invisible_symbol_style)],
2612 ),
2613 hover_popovers: hover,
2614 },
2615 )
2616 }
2617
2618 fn paint(
2619 &mut self,
2620 scene: &mut SceneBuilder,
2621 bounds: RectF,
2622 visible_bounds: RectF,
2623 layout: &mut Self::LayoutState,
2624 editor: &mut Editor,
2625 cx: &mut PaintContext<Editor>,
2626 ) -> Self::PaintState {
2627 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2628 scene.push_layer(Some(visible_bounds));
2629
2630 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2631 let text_bounds = RectF::new(
2632 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2633 layout.text_size,
2634 );
2635
2636 Self::attach_mouse_handlers(
2637 scene,
2638 &layout.position_map,
2639 layout.hover_popovers.is_some(),
2640 visible_bounds,
2641 text_bounds,
2642 gutter_bounds,
2643 bounds,
2644 cx,
2645 );
2646
2647 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2648 if layout.gutter_size.x() > 0. {
2649 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2650 }
2651 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2652
2653 scene.push_layer(Some(bounds));
2654 if !layout.blocks.is_empty() {
2655 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2656 }
2657 self.paint_scrollbar(scene, bounds, layout, cx, &editor);
2658 scene.pop_layer();
2659
2660 scene.pop_layer();
2661 }
2662
2663 fn rect_for_text_range(
2664 &self,
2665 range_utf16: Range<usize>,
2666 bounds: RectF,
2667 _: RectF,
2668 layout: &Self::LayoutState,
2669 _: &Self::PaintState,
2670 _: &Editor,
2671 _: &ViewContext<Editor>,
2672 ) -> Option<RectF> {
2673 let text_bounds = RectF::new(
2674 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2675 layout.text_size,
2676 );
2677 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2678 let scroll_position = layout.position_map.snapshot.scroll_position();
2679 let start_row = scroll_position.y() as u32;
2680 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2681 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2682
2683 let range_start = OffsetUtf16(range_utf16.start)
2684 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2685 if range_start.row() < start_row {
2686 return None;
2687 }
2688
2689 let line = &layout
2690 .position_map
2691 .line_layouts
2692 .get((range_start.row() - start_row) as usize)?
2693 .line;
2694 let range_start_x = line.x_for_index(range_start.column() as usize);
2695 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2696 Some(RectF::new(
2697 content_origin
2698 + vec2f(
2699 range_start_x,
2700 range_start_y + layout.position_map.line_height,
2701 )
2702 - vec2f(scroll_left, scroll_top),
2703 vec2f(
2704 layout.position_map.em_width,
2705 layout.position_map.line_height,
2706 ),
2707 ))
2708 }
2709
2710 fn debug(
2711 &self,
2712 bounds: RectF,
2713 _: &Self::LayoutState,
2714 _: &Self::PaintState,
2715 _: &Editor,
2716 _: &ViewContext<Editor>,
2717 ) -> json::Value {
2718 json!({
2719 "type": "BufferElement",
2720 "bounds": bounds.to_json()
2721 })
2722 }
2723}
2724
2725type BufferRow = u32;
2726
2727pub struct LayoutState {
2728 position_map: Arc<PositionMap>,
2729 gutter_size: Vector2F,
2730 gutter_padding: f32,
2731 gutter_margin: f32,
2732 text_size: Vector2F,
2733 mode: EditorMode,
2734 wrap_guides: SmallVec<[(f32, bool); 2]>,
2735 visible_display_row_range: Range<u32>,
2736 active_rows: BTreeMap<u32, bool>,
2737 highlighted_rows: Option<Range<u32>>,
2738 line_number_layouts: Vec<Option<text_layout::Line>>,
2739 display_hunks: Vec<DisplayDiffHunk>,
2740 blocks: Vec<BlockLayout>,
2741 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2742 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2743 selections: Vec<(Option<ReplicaId>, Vec<SelectionLayout>)>,
2744 scrollbar_row_range: Range<f32>,
2745 show_scrollbars: bool,
2746 is_singleton: bool,
2747 max_row: u32,
2748 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2749 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2750 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2751 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2752 tab_invisible: Line,
2753 space_invisible: Line,
2754}
2755
2756struct PositionMap {
2757 size: Vector2F,
2758 line_height: f32,
2759 scroll_max: Vector2F,
2760 em_width: f32,
2761 em_advance: f32,
2762 line_layouts: Vec<LineWithInvisibles>,
2763 snapshot: EditorSnapshot,
2764}
2765
2766#[derive(Debug)]
2767struct PointForPosition {
2768 previous_valid: DisplayPoint,
2769 next_valid: DisplayPoint,
2770 exact_unclipped: DisplayPoint,
2771 column_overshoot_after_line_end: u32,
2772}
2773
2774impl PointForPosition {
2775 fn as_valid(&self) -> Option<DisplayPoint> {
2776 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2777 Some(self.previous_valid)
2778 } else {
2779 None
2780 }
2781 }
2782}
2783
2784impl PositionMap {
2785 fn point_for_position(&self, text_bounds: RectF, position: Vector2F) -> PointForPosition {
2786 let scroll_position = self.snapshot.scroll_position();
2787 let position = position - text_bounds.origin();
2788 let y = position.y().max(0.0).min(self.size.y());
2789 let x = position.x() + (scroll_position.x() * self.em_width);
2790 let row = (y / self.line_height + scroll_position.y()) as u32;
2791 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2792 .line_layouts
2793 .get(row as usize - scroll_position.y() as usize)
2794 .map(|line_with_spaces| &line_with_spaces.line)
2795 {
2796 if let Some(ix) = line.index_for_x(x) {
2797 (ix as u32, 0.0)
2798 } else {
2799 (line.len() as u32, 0f32.max(x - line.width()))
2800 }
2801 } else {
2802 (0, x)
2803 };
2804
2805 let mut exact_unclipped = DisplayPoint::new(row, column);
2806 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2807 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2808
2809 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2810 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2811 PointForPosition {
2812 previous_valid,
2813 next_valid,
2814 exact_unclipped,
2815 column_overshoot_after_line_end,
2816 }
2817 }
2818}
2819
2820struct BlockLayout {
2821 row: u32,
2822 element: AnyElement<Editor>,
2823 style: BlockStyle,
2824}
2825
2826fn layout_line(
2827 row: u32,
2828 snapshot: &EditorSnapshot,
2829 style: &EditorStyle,
2830 layout_cache: &TextLayoutCache,
2831) -> text_layout::Line {
2832 let mut line = snapshot.line(row);
2833
2834 if line.len() > MAX_LINE_LEN {
2835 let mut len = MAX_LINE_LEN;
2836 while !line.is_char_boundary(len) {
2837 len -= 1;
2838 }
2839
2840 line.truncate(len);
2841 }
2842
2843 layout_cache.layout_str(
2844 &line,
2845 style.text.font_size,
2846 &[(
2847 snapshot.line_len(row) as usize,
2848 RunStyle {
2849 font_id: style.text.font_id,
2850 color: Color::black(),
2851 underline: Default::default(),
2852 },
2853 )],
2854 )
2855}
2856
2857#[derive(Debug)]
2858pub struct Cursor {
2859 origin: Vector2F,
2860 block_width: f32,
2861 line_height: f32,
2862 color: Color,
2863 shape: CursorShape,
2864 block_text: Option<Line>,
2865}
2866
2867impl Cursor {
2868 pub fn new(
2869 origin: Vector2F,
2870 block_width: f32,
2871 line_height: f32,
2872 color: Color,
2873 shape: CursorShape,
2874 block_text: Option<Line>,
2875 ) -> Cursor {
2876 Cursor {
2877 origin,
2878 block_width,
2879 line_height,
2880 color,
2881 shape,
2882 block_text,
2883 }
2884 }
2885
2886 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2887 RectF::new(
2888 self.origin + origin,
2889 vec2f(self.block_width, self.line_height),
2890 )
2891 }
2892
2893 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2894 let bounds = match self.shape {
2895 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2896 CursorShape::Block | CursorShape::Hollow => RectF::new(
2897 self.origin + origin,
2898 vec2f(self.block_width, self.line_height),
2899 ),
2900 CursorShape::Underscore => RectF::new(
2901 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2902 vec2f(self.block_width, 2.0),
2903 ),
2904 };
2905
2906 //Draw background or border quad
2907 if matches!(self.shape, CursorShape::Hollow) {
2908 scene.push_quad(Quad {
2909 bounds,
2910 background: None,
2911 border: Border::all(1., self.color),
2912 corner_radii: Default::default(),
2913 });
2914 } else {
2915 scene.push_quad(Quad {
2916 bounds,
2917 background: Some(self.color),
2918 border: Default::default(),
2919 corner_radii: Default::default(),
2920 });
2921 }
2922
2923 if let Some(block_text) = &self.block_text {
2924 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2925 }
2926 }
2927
2928 pub fn shape(&self) -> CursorShape {
2929 self.shape
2930 }
2931}
2932
2933#[derive(Debug)]
2934pub struct HighlightedRange {
2935 pub start_y: f32,
2936 pub line_height: f32,
2937 pub lines: Vec<HighlightedRangeLine>,
2938 pub color: Color,
2939 pub corner_radius: f32,
2940}
2941
2942#[derive(Debug)]
2943pub struct HighlightedRangeLine {
2944 pub start_x: f32,
2945 pub end_x: f32,
2946}
2947
2948impl HighlightedRange {
2949 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2950 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2951 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2952 self.paint_lines(
2953 self.start_y + self.line_height,
2954 &self.lines[1..],
2955 bounds,
2956 scene,
2957 );
2958 } else {
2959 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2960 }
2961 }
2962
2963 fn paint_lines(
2964 &self,
2965 start_y: f32,
2966 lines: &[HighlightedRangeLine],
2967 bounds: RectF,
2968 scene: &mut SceneBuilder,
2969 ) {
2970 if lines.is_empty() {
2971 return;
2972 }
2973
2974 let mut path = PathBuilder::new();
2975 let first_line = lines.first().unwrap();
2976 let last_line = lines.last().unwrap();
2977
2978 let first_top_left = vec2f(first_line.start_x, start_y);
2979 let first_top_right = vec2f(first_line.end_x, start_y);
2980
2981 let curve_height = vec2f(0., self.corner_radius);
2982 let curve_width = |start_x: f32, end_x: f32| {
2983 let max = (end_x - start_x) / 2.;
2984 let width = if max < self.corner_radius {
2985 max
2986 } else {
2987 self.corner_radius
2988 };
2989
2990 vec2f(width, 0.)
2991 };
2992
2993 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2994 path.reset(first_top_right - top_curve_width);
2995 path.curve_to(first_top_right + curve_height, first_top_right);
2996
2997 let mut iter = lines.iter().enumerate().peekable();
2998 while let Some((ix, line)) = iter.next() {
2999 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3000
3001 if let Some((_, next_line)) = iter.peek() {
3002 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
3003
3004 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
3005 Ordering::Equal => {
3006 path.line_to(bottom_right);
3007 }
3008 Ordering::Less => {
3009 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
3010 path.line_to(bottom_right - curve_height);
3011 if self.corner_radius > 0. {
3012 path.curve_to(bottom_right - curve_width, bottom_right);
3013 }
3014 path.line_to(next_top_right + curve_width);
3015 if self.corner_radius > 0. {
3016 path.curve_to(next_top_right + curve_height, next_top_right);
3017 }
3018 }
3019 Ordering::Greater => {
3020 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
3021 path.line_to(bottom_right - curve_height);
3022 if self.corner_radius > 0. {
3023 path.curve_to(bottom_right + curve_width, bottom_right);
3024 }
3025 path.line_to(next_top_right - curve_width);
3026 if self.corner_radius > 0. {
3027 path.curve_to(next_top_right + curve_height, next_top_right);
3028 }
3029 }
3030 }
3031 } else {
3032 let curve_width = curve_width(line.start_x, line.end_x);
3033 path.line_to(bottom_right - curve_height);
3034 if self.corner_radius > 0. {
3035 path.curve_to(bottom_right - curve_width, bottom_right);
3036 }
3037
3038 let bottom_left = vec2f(line.start_x, bottom_right.y());
3039 path.line_to(bottom_left + curve_width);
3040 if self.corner_radius > 0. {
3041 path.curve_to(bottom_left - curve_height, bottom_left);
3042 }
3043 }
3044 }
3045
3046 if first_line.start_x > last_line.start_x {
3047 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3048 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
3049 path.line_to(second_top_left + curve_height);
3050 if self.corner_radius > 0. {
3051 path.curve_to(second_top_left + curve_width, second_top_left);
3052 }
3053 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
3054 path.line_to(first_bottom_left - curve_width);
3055 if self.corner_radius > 0. {
3056 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3057 }
3058 }
3059
3060 path.line_to(first_top_left + curve_height);
3061 if self.corner_radius > 0. {
3062 path.curve_to(first_top_left + top_curve_width, first_top_left);
3063 }
3064 path.line_to(first_top_right - top_curve_width);
3065
3066 scene.push_path(path.build(self.color, Some(bounds)));
3067 }
3068}
3069
3070fn range_to_bounds(
3071 range: &Range<DisplayPoint>,
3072 content_origin: Vector2F,
3073 scroll_left: f32,
3074 scroll_top: f32,
3075 visible_row_range: &Range<u32>,
3076 line_end_overshoot: f32,
3077 position_map: &PositionMap,
3078) -> impl Iterator<Item = RectF> {
3079 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
3080
3081 if range.start == range.end {
3082 return bounds.into_iter();
3083 }
3084
3085 let start_row = visible_row_range.start;
3086 let end_row = visible_row_range.end;
3087
3088 let row_range = if range.end.column() == 0 {
3089 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
3090 } else {
3091 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
3092 };
3093
3094 let first_y =
3095 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
3096
3097 for (idx, row) in row_range.enumerate() {
3098 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
3099
3100 let start_x = if row == range.start.row() {
3101 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
3102 - scroll_left
3103 } else {
3104 content_origin.x() - scroll_left
3105 };
3106
3107 let end_x = if row == range.end.row() {
3108 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
3109 } else {
3110 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
3111 };
3112
3113 bounds.push(RectF::from_points(
3114 vec2f(start_x, first_y + position_map.line_height * idx as f32),
3115 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
3116 ))
3117 }
3118
3119 bounds.into_iter()
3120}
3121
3122pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
3123 delta.powf(1.5) / 100.0
3124}
3125
3126fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3127 delta.powf(1.2) / 300.0
3128}
3129
3130#[cfg(test)]
3131mod tests {
3132 use super::*;
3133 use crate::{
3134 display_map::{BlockDisposition, BlockProperties},
3135 editor_tests::{init_test, update_test_language_settings},
3136 Editor, MultiBuffer,
3137 };
3138 use gpui::TestAppContext;
3139 use language::language_settings;
3140 use log::info;
3141 use std::{num::NonZeroU32, sync::Arc};
3142 use util::test::sample_text;
3143
3144 #[gpui::test]
3145 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3146 init_test(cx, |_| {});
3147
3148 let editor = cx
3149 .add_window(|cx| {
3150 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3151 Editor::new(EditorMode::Full, buffer, None, None, cx)
3152 })
3153 .root(cx);
3154 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3155
3156 let layouts = editor.update(cx, |editor, cx| {
3157 let snapshot = editor.snapshot(cx);
3158 element
3159 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
3160 .0
3161 });
3162 assert_eq!(layouts.len(), 6);
3163 }
3164
3165 #[gpui::test]
3166 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3167 init_test(cx, |_| {});
3168
3169 let editor = cx
3170 .add_window(|cx| {
3171 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3172 Editor::new(EditorMode::Full, buffer, None, None, cx)
3173 })
3174 .root(cx);
3175 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3176 let (_, state) = editor.update(cx, |editor, cx| {
3177 editor.cursor_shape = CursorShape::Block;
3178 editor.change_selections(None, cx, |s| {
3179 s.select_ranges([
3180 Point::new(0, 0)..Point::new(1, 0),
3181 Point::new(3, 2)..Point::new(3, 3),
3182 Point::new(5, 6)..Point::new(6, 0),
3183 ]);
3184 });
3185 let mut new_parents = Default::default();
3186 let mut notify_views_if_parents_change = Default::default();
3187 let mut layout_cx = LayoutContext::new(
3188 cx,
3189 &mut new_parents,
3190 &mut notify_views_if_parents_change,
3191 false,
3192 );
3193 element.layout(
3194 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3195 editor,
3196 &mut layout_cx,
3197 )
3198 });
3199 assert_eq!(state.selections.len(), 1);
3200 let local_selections = &state.selections[0].1;
3201 assert_eq!(local_selections.len(), 3);
3202 // moves cursor back one line
3203 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3204 assert_eq!(
3205 local_selections[0].range,
3206 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3207 );
3208
3209 // moves cursor back one column
3210 assert_eq!(
3211 local_selections[1].range,
3212 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3213 );
3214 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3215
3216 // leaves cursor on the max point
3217 assert_eq!(
3218 local_selections[2].range,
3219 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3220 );
3221 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3222
3223 // active lines does not include 1 (even though the range of the selection does)
3224 assert_eq!(
3225 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3226 vec![0, 3, 5, 6]
3227 );
3228
3229 // multi-buffer support
3230 // in DisplayPoint co-ordinates, this is what we're dealing with:
3231 // 0: [[file
3232 // 1: header]]
3233 // 2: aaaaaa
3234 // 3: bbbbbb
3235 // 4: cccccc
3236 // 5:
3237 // 6: ...
3238 // 7: ffffff
3239 // 8: gggggg
3240 // 9: hhhhhh
3241 // 10:
3242 // 11: [[file
3243 // 12: header]]
3244 // 13: bbbbbb
3245 // 14: cccccc
3246 // 15: dddddd
3247 let editor = cx
3248 .add_window(|cx| {
3249 let buffer = MultiBuffer::build_multi(
3250 [
3251 (
3252 &(sample_text(8, 6, 'a') + "\n"),
3253 vec![
3254 Point::new(0, 0)..Point::new(3, 0),
3255 Point::new(4, 0)..Point::new(7, 0),
3256 ],
3257 ),
3258 (
3259 &(sample_text(8, 6, 'a') + "\n"),
3260 vec![Point::new(1, 0)..Point::new(3, 0)],
3261 ),
3262 ],
3263 cx,
3264 );
3265 Editor::new(EditorMode::Full, buffer, None, None, cx)
3266 })
3267 .root(cx);
3268 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3269 let (_, state) = editor.update(cx, |editor, cx| {
3270 editor.cursor_shape = CursorShape::Block;
3271 editor.change_selections(None, cx, |s| {
3272 s.select_display_ranges([
3273 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3274 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3275 ]);
3276 });
3277 let mut new_parents = Default::default();
3278 let mut notify_views_if_parents_change = Default::default();
3279 let mut layout_cx = LayoutContext::new(
3280 cx,
3281 &mut new_parents,
3282 &mut notify_views_if_parents_change,
3283 false,
3284 );
3285 element.layout(
3286 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3287 editor,
3288 &mut layout_cx,
3289 )
3290 });
3291
3292 assert_eq!(state.selections.len(), 1);
3293 let local_selections = &state.selections[0].1;
3294 assert_eq!(local_selections.len(), 2);
3295
3296 // moves cursor on excerpt boundary back a line
3297 // and doesn't allow selection to bleed through
3298 assert_eq!(
3299 local_selections[0].range,
3300 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3301 );
3302 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3303
3304 // moves cursor on buffer boundary back two lines
3305 // and doesn't allow selection to bleed through
3306 assert_eq!(
3307 local_selections[1].range,
3308 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3309 );
3310 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3311 }
3312
3313 #[gpui::test]
3314 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3315 init_test(cx, |_| {});
3316
3317 let editor = cx
3318 .add_window(|cx| {
3319 let buffer = MultiBuffer::build_simple("", cx);
3320 Editor::new(EditorMode::Full, buffer, None, None, cx)
3321 })
3322 .root(cx);
3323
3324 editor.update(cx, |editor, cx| {
3325 editor.set_placeholder_text("hello", cx);
3326 editor.insert_blocks(
3327 [BlockProperties {
3328 style: BlockStyle::Fixed,
3329 disposition: BlockDisposition::Above,
3330 height: 3,
3331 position: Anchor::min(),
3332 render: Arc::new(|_| Empty::new().into_any()),
3333 }],
3334 None,
3335 cx,
3336 );
3337
3338 // Blur the editor so that it displays placeholder text.
3339 cx.blur();
3340 });
3341
3342 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3343 let (size, mut state) = editor.update(cx, |editor, cx| {
3344 let mut new_parents = Default::default();
3345 let mut notify_views_if_parents_change = Default::default();
3346 let mut layout_cx = LayoutContext::new(
3347 cx,
3348 &mut new_parents,
3349 &mut notify_views_if_parents_change,
3350 false,
3351 );
3352 element.layout(
3353 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3354 editor,
3355 &mut layout_cx,
3356 )
3357 });
3358
3359 assert_eq!(state.position_map.line_layouts.len(), 4);
3360 assert_eq!(
3361 state
3362 .line_number_layouts
3363 .iter()
3364 .map(Option::is_some)
3365 .collect::<Vec<_>>(),
3366 &[false, false, false, true]
3367 );
3368
3369 // Don't panic.
3370 let mut scene = SceneBuilder::new(1.0);
3371 let bounds = RectF::new(Default::default(), size);
3372 editor.update(cx, |editor, cx| {
3373 element.paint(
3374 &mut scene,
3375 bounds,
3376 bounds,
3377 &mut state,
3378 editor,
3379 &mut PaintContext::new(cx),
3380 );
3381 });
3382 }
3383
3384 #[gpui::test]
3385 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3386 const TAB_SIZE: u32 = 4;
3387
3388 let input_text = "\t \t|\t| a b";
3389 let expected_invisibles = vec![
3390 Invisible::Tab {
3391 line_start_offset: 0,
3392 },
3393 Invisible::Whitespace {
3394 line_offset: TAB_SIZE as usize,
3395 },
3396 Invisible::Tab {
3397 line_start_offset: TAB_SIZE as usize + 1,
3398 },
3399 Invisible::Tab {
3400 line_start_offset: TAB_SIZE as usize * 2 + 1,
3401 },
3402 Invisible::Whitespace {
3403 line_offset: TAB_SIZE as usize * 3 + 1,
3404 },
3405 Invisible::Whitespace {
3406 line_offset: TAB_SIZE as usize * 3 + 3,
3407 },
3408 ];
3409 assert_eq!(
3410 expected_invisibles.len(),
3411 input_text
3412 .chars()
3413 .filter(|initial_char| initial_char.is_whitespace())
3414 .count(),
3415 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3416 );
3417
3418 init_test(cx, |s| {
3419 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3420 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3421 });
3422
3423 let actual_invisibles =
3424 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3425
3426 assert_eq!(expected_invisibles, actual_invisibles);
3427 }
3428
3429 #[gpui::test]
3430 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3431 init_test(cx, |s| {
3432 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3433 s.defaults.tab_size = NonZeroU32::new(4);
3434 });
3435
3436 for editor_mode_without_invisibles in [
3437 EditorMode::SingleLine,
3438 EditorMode::AutoHeight { max_lines: 100 },
3439 ] {
3440 let invisibles = collect_invisibles_from_new_editor(
3441 cx,
3442 editor_mode_without_invisibles,
3443 "\t\t\t| | a b",
3444 500.0,
3445 );
3446 assert!(invisibles.is_empty(),
3447 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3448 }
3449 }
3450
3451 #[gpui::test]
3452 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3453 let tab_size = 4;
3454 let input_text = "a\tbcd ".repeat(9);
3455 let repeated_invisibles = [
3456 Invisible::Tab {
3457 line_start_offset: 1,
3458 },
3459 Invisible::Whitespace {
3460 line_offset: tab_size as usize + 3,
3461 },
3462 Invisible::Whitespace {
3463 line_offset: tab_size as usize + 4,
3464 },
3465 Invisible::Whitespace {
3466 line_offset: tab_size as usize + 5,
3467 },
3468 ];
3469 let expected_invisibles = std::iter::once(repeated_invisibles)
3470 .cycle()
3471 .take(9)
3472 .flatten()
3473 .collect::<Vec<_>>();
3474 assert_eq!(
3475 expected_invisibles.len(),
3476 input_text
3477 .chars()
3478 .filter(|initial_char| initial_char.is_whitespace())
3479 .count(),
3480 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3481 );
3482 info!("Expected invisibles: {expected_invisibles:?}");
3483
3484 init_test(cx, |_| {});
3485
3486 // Put the same string with repeating whitespace pattern into editors of various size,
3487 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3488 let resize_step = 10.0;
3489 let mut editor_width = 200.0;
3490 while editor_width <= 1000.0 {
3491 update_test_language_settings(cx, |s| {
3492 s.defaults.tab_size = NonZeroU32::new(tab_size);
3493 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3494 s.defaults.preferred_line_length = Some(editor_width as u32);
3495 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3496 });
3497
3498 let actual_invisibles =
3499 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3500
3501 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3502 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3503 let mut i = 0;
3504 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3505 i = actual_index;
3506 match expected_invisibles.get(i) {
3507 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3508 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3509 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3510 _ => {
3511 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3512 }
3513 },
3514 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3515 }
3516 }
3517 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3518 assert!(
3519 missing_expected_invisibles.is_empty(),
3520 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3521 );
3522
3523 editor_width += resize_step;
3524 }
3525 }
3526
3527 fn collect_invisibles_from_new_editor(
3528 cx: &mut TestAppContext,
3529 editor_mode: EditorMode,
3530 input_text: &str,
3531 editor_width: f32,
3532 ) -> Vec<Invisible> {
3533 info!(
3534 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3535 );
3536 let editor = cx
3537 .add_window(|cx| {
3538 let buffer = MultiBuffer::build_simple(&input_text, cx);
3539 Editor::new(editor_mode, buffer, None, None, cx)
3540 })
3541 .root(cx);
3542
3543 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3544 let (_, layout_state) = editor.update(cx, |editor, cx| {
3545 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3546 editor.set_wrap_width(Some(editor_width), cx);
3547
3548 let mut new_parents = Default::default();
3549 let mut notify_views_if_parents_change = Default::default();
3550 let mut layout_cx = LayoutContext::new(
3551 cx,
3552 &mut new_parents,
3553 &mut notify_views_if_parents_change,
3554 false,
3555 );
3556 element.layout(
3557 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3558 editor,
3559 &mut layout_cx,
3560 )
3561 });
3562
3563 layout_state
3564 .position_map
3565 .line_layouts
3566 .iter()
3567 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3568 .flatten()
3569 .cloned()
3570 .collect()
3571 }
3572}