1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, SelectPhase, SoftWrap, ToPoint,
4 MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 editor_settings::ShowScrollbar,
9 git::{diff_hunk_to_display, DisplayDiffHunk},
10 hover_popover::{
11 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
12 MIN_POPOVER_LINE_HEIGHT,
13 },
14 link_go_to_definition::{
15 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
16 update_inlay_link_and_hover_points, GoToDefinitionTrigger,
17 },
18 mouse_context_menu, EditorSettings, EditorStyle, GutterHover, UnfoldAt,
19};
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, CursorRegion, Element, EventContext, FontCache, MouseRegion, Quad,
35 SizeConstraint, ViewContext, WindowContext,
36};
37use itertools::Itertools;
38use json::json;
39use language::{
40 language_settings::ShowWhitespaceSetting, Bias, CursorShape, DiagnosticSeverity, OffsetUtf16,
41 Selection,
42};
43use project::{
44 project_settings::{GitGutterSetting, ProjectSettings},
45 ProjectPath,
46};
47use smallvec::SmallVec;
48use std::{
49 borrow::Cow,
50 cmp::{self, Ordering},
51 fmt::Write,
52 iter,
53 ops::Range,
54 sync::Arc,
55};
56use text::Point;
57use theme::SelectionStyle;
58use workspace::item::Item;
59
60enum FoldMarkers {}
61
62struct SelectionLayout {
63 head: DisplayPoint,
64 cursor_shape: CursorShape,
65 is_newest: bool,
66 is_local: bool,
67 range: Range<DisplayPoint>,
68 active_rows: Range<u32>,
69}
70
71impl SelectionLayout {
72 fn new<T: ToPoint + ToDisplayPoint + Clone>(
73 selection: Selection<T>,
74 line_mode: bool,
75 cursor_shape: CursorShape,
76 map: &DisplaySnapshot,
77 is_newest: bool,
78 is_local: bool,
79 ) -> Self {
80 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
81 let display_selection = point_selection.map(|p| p.to_display_point(map));
82 let mut range = display_selection.range();
83 let mut head = display_selection.head();
84 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
85 ..map.next_line_boundary(point_selection.end).1.row();
86
87 // vim visual line mode
88 if line_mode {
89 let point_range = map.expand_to_line(point_selection.range());
90 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
91 }
92
93 // any vim visual mode (including line mode)
94 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
95 if head.column() > 0 {
96 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
97 } else if head.row() > 0 && head != map.max_point() {
98 head = map.clip_point(
99 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
100 Bias::Left,
101 );
102 // updating range.end is a no-op unless you're cursor is
103 // on the newline containing a multi-buffer divider
104 // in which case the clip_point may have moved the head up
105 // an additional row.
106 range.end = DisplayPoint::new(head.row() + 1, 0);
107 active_rows.end = head.row();
108 }
109 }
110
111 Self {
112 head,
113 cursor_shape,
114 is_newest,
115 is_local,
116 range,
117 active_rows,
118 }
119 }
120}
121
122pub struct EditorElement {
123 style: Arc<EditorStyle>,
124}
125
126impl EditorElement {
127 pub fn new(style: EditorStyle) -> Self {
128 Self {
129 style: Arc::new(style),
130 }
131 }
132
133 fn attach_mouse_handlers(
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 let view_id = cx.view_id();
144 cx.scene().push_mouse_region(
145 MouseRegion::new::<EditorElementMouseHandlers>(view_id, view_id, visible_bounds)
146 .on_down(MouseButton::Left, {
147 let position_map = position_map.clone();
148 move |event, editor, cx| {
149 if !Self::mouse_down(
150 editor,
151 event.platform_event,
152 position_map.as_ref(),
153 text_bounds,
154 gutter_bounds,
155 cx,
156 ) {
157 cx.propagate_event();
158 }
159 }
160 })
161 .on_down(MouseButton::Right, {
162 let position_map = position_map.clone();
163 move |event, editor, cx| {
164 if !Self::mouse_right_down(
165 editor,
166 event.position,
167 position_map.as_ref(),
168 text_bounds,
169 cx,
170 ) {
171 cx.propagate_event();
172 }
173 }
174 })
175 .on_up(MouseButton::Left, {
176 let position_map = position_map.clone();
177 move |event, editor, cx| {
178 if !Self::mouse_up(
179 editor,
180 event.position,
181 event.cmd,
182 event.shift,
183 event.alt,
184 position_map.as_ref(),
185 text_bounds,
186 cx,
187 ) {
188 cx.propagate_event()
189 }
190 }
191 })
192 .on_drag(MouseButton::Left, {
193 let position_map = position_map.clone();
194 move |event, editor, cx| {
195 if event.end {
196 return;
197 }
198
199 if !Self::mouse_dragged(
200 editor,
201 event.platform_event,
202 position_map.as_ref(),
203 text_bounds,
204 cx,
205 ) {
206 cx.propagate_event()
207 }
208 }
209 })
210 .on_move({
211 let position_map = position_map.clone();
212 move |event, editor, cx| {
213 if !Self::mouse_moved(
214 editor,
215 event.platform_event,
216 &position_map,
217 text_bounds,
218 cx,
219 ) {
220 cx.propagate_event()
221 }
222 }
223 })
224 .on_move_out(move |_, editor: &mut Editor, cx| {
225 if has_popovers {
226 hide_hover(editor, cx);
227 }
228 })
229 .on_scroll({
230 let position_map = position_map.clone();
231 move |event, editor, cx| {
232 if !Self::scroll(
233 editor,
234 event.position,
235 *event.delta.raw(),
236 event.delta.precise(),
237 &position_map,
238 bounds,
239 cx,
240 ) {
241 cx.propagate_event()
242 }
243 }
244 }),
245 );
246
247 enum GutterHandlers {}
248 let view_id = cx.view_id();
249 let region_id = cx.view_id() + 1;
250 cx.scene().push_mouse_region(
251 MouseRegion::new::<GutterHandlers>(view_id, region_id, gutter_bounds).on_hover(
252 |hover, editor: &mut Editor, cx| {
253 editor.gutter_hover(
254 &GutterHover {
255 hovered: hover.started,
256 },
257 cx,
258 );
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 let point = position_map.point_for_position(text_bounds, position);
361 let could_be_inlay = point.as_valid().is_none();
362 if shift || could_be_inlay {
363 go_to_fetched_type_definition(editor, point, alt, cx);
364 } else {
365 go_to_fetched_definition(editor, point, alt, cx);
366 }
367
368 return true;
369 }
370
371 end_selection
372 }
373
374 fn mouse_dragged(
375 editor: &mut Editor,
376 MouseMovedEvent {
377 modifiers: Modifiers { cmd, shift, .. },
378 position,
379 ..
380 }: MouseMovedEvent,
381 position_map: &PositionMap,
382 text_bounds: RectF,
383 cx: &mut EventContext<Editor>,
384 ) -> bool {
385 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
386 // Don't trigger hover popover if mouse is hovering over context menu
387 let point = if text_bounds.contains_point(position) {
388 position_map
389 .point_for_position(text_bounds, position)
390 .as_valid()
391 } else {
392 None
393 };
394
395 update_go_to_definition_link(
396 editor,
397 point.map(GoToDefinitionTrigger::Text),
398 cmd,
399 shift,
400 cx,
401 );
402
403 if editor.has_pending_selection() {
404 let mut scroll_delta = Vector2F::zero();
405
406 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
407 let top = text_bounds.origin_y() + vertical_margin;
408 let bottom = text_bounds.lower_left().y() - vertical_margin;
409 if position.y() < top {
410 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
411 }
412 if position.y() > bottom {
413 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
414 }
415
416 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
417 let left = text_bounds.origin_x() + horizontal_margin;
418 let right = text_bounds.upper_right().x() - horizontal_margin;
419 if position.x() < left {
420 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
421 left - position.x(),
422 ))
423 }
424 if position.x() > right {
425 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
426 position.x() - right,
427 ))
428 }
429
430 let point_for_position = position_map.point_for_position(text_bounds, position);
431
432 editor.select(
433 SelectPhase::Update {
434 position: point_for_position.previous_valid,
435 goal_column: point_for_position.exact_unclipped.column(),
436 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
437 .clamp(Vector2F::zero(), position_map.scroll_max),
438 },
439 cx,
440 );
441 hover_at(editor, point, cx);
442 true
443 } else {
444 hover_at(editor, point, cx);
445 false
446 }
447 }
448
449 fn mouse_moved(
450 editor: &mut Editor,
451 MouseMovedEvent {
452 modifiers: Modifiers { shift, cmd, .. },
453 position,
454 ..
455 }: MouseMovedEvent,
456 position_map: &PositionMap,
457 text_bounds: RectF,
458 cx: &mut ViewContext<Editor>,
459 ) -> bool {
460 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
461 // Don't trigger hover popover if mouse is hovering over context menu
462 if text_bounds.contains_point(position) {
463 let point_for_position = position_map.point_for_position(text_bounds, position);
464 match point_for_position.as_valid() {
465 Some(point) => {
466 update_go_to_definition_link(
467 editor,
468 Some(GoToDefinitionTrigger::Text(point)),
469 cmd,
470 shift,
471 cx,
472 );
473 hover_at(editor, Some(point), cx);
474 }
475 None => {
476 update_inlay_link_and_hover_points(
477 &position_map.snapshot,
478 point_for_position,
479 editor,
480 cmd,
481 shift,
482 cx,
483 );
484 }
485 }
486 } else {
487 update_go_to_definition_link(editor, None, cmd, shift, cx);
488 hover_at(editor, None, cx);
489 }
490
491 true
492 }
493
494 fn scroll(
495 editor: &mut Editor,
496 position: Vector2F,
497 mut delta: Vector2F,
498 precise: bool,
499 position_map: &PositionMap,
500 bounds: RectF,
501 cx: &mut ViewContext<Editor>,
502 ) -> bool {
503 if !bounds.contains_point(position) {
504 return false;
505 }
506
507 let line_height = position_map.line_height;
508 let max_glyph_width = position_map.em_width;
509
510 let axis = if precise {
511 //Trackpad
512 position_map.snapshot.ongoing_scroll.filter(&mut delta)
513 } else {
514 //Not trackpad
515 delta *= vec2f(max_glyph_width, line_height);
516 None //Resets ongoing scroll
517 };
518
519 let scroll_position = position_map.snapshot.scroll_position();
520 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
521 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
522 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
523 editor.scroll(scroll_position, axis, cx);
524
525 true
526 }
527
528 fn paint_background(
529 &self,
530 gutter_bounds: RectF,
531 text_bounds: RectF,
532 layout: &LayoutState,
533 cx: &mut ViewContext<Editor>,
534 ) {
535 let bounds = gutter_bounds.union_rect(text_bounds);
536 let scroll_top =
537 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
538 cx.scene().push_quad(Quad {
539 bounds: gutter_bounds,
540 background: Some(self.style.gutter_background),
541 border: Border::new(0., Color::transparent_black()).into(),
542 corner_radii: Default::default(),
543 });
544 cx.scene().push_quad(Quad {
545 bounds: text_bounds,
546 background: Some(self.style.background),
547 border: Border::new(0., Color::transparent_black()).into(),
548 corner_radii: Default::default(),
549 });
550
551 if let EditorMode::Full = layout.mode {
552 let mut active_rows = layout.active_rows.iter().peekable();
553 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
554 let mut end_row = *start_row;
555 while active_rows.peek().map_or(false, |r| {
556 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
557 }) {
558 active_rows.next().unwrap();
559 end_row += 1;
560 }
561
562 if !contains_non_empty_selection {
563 let origin = vec2f(
564 bounds.origin_x(),
565 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
566 - scroll_top,
567 );
568 let size = vec2f(
569 bounds.width(),
570 layout.position_map.line_height * (end_row - start_row + 1) as f32,
571 );
572 cx.scene().push_quad(Quad {
573 bounds: RectF::new(origin, size),
574 background: Some(self.style.active_line_background),
575 border: Border::default().into(),
576 corner_radii: Default::default(),
577 });
578 }
579 }
580
581 if let Some(highlighted_rows) = &layout.highlighted_rows {
582 let origin = vec2f(
583 bounds.origin_x(),
584 bounds.origin_y()
585 + (layout.position_map.line_height * highlighted_rows.start as f32)
586 - scroll_top,
587 );
588 let size = vec2f(
589 bounds.width(),
590 layout.position_map.line_height * highlighted_rows.len() as f32,
591 );
592 cx.scene().push_quad(Quad {
593 bounds: RectF::new(origin, size),
594 background: Some(self.style.highlighted_line_background),
595 border: Border::default().into(),
596 corner_radii: Default::default(),
597 });
598 }
599
600 let scroll_left =
601 layout.position_map.snapshot.scroll_position().x() * layout.position_map.em_width;
602
603 for (wrap_position, active) in layout.wrap_guides.iter() {
604 let x =
605 (text_bounds.origin_x() + wrap_position + layout.position_map.em_width / 2.)
606 - scroll_left;
607
608 if x < text_bounds.origin_x()
609 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
610 {
611 continue;
612 }
613
614 let color = if *active {
615 self.style.active_wrap_guide
616 } else {
617 self.style.wrap_guide
618 };
619 cx.scene().push_quad(Quad {
620 bounds: RectF::new(
621 vec2f(x, text_bounds.origin_y()),
622 vec2f(1., text_bounds.height()),
623 ),
624 background: Some(color),
625 border: Border::new(0., Color::transparent_black()).into(),
626 corner_radii: Default::default(),
627 });
628 }
629 }
630 }
631
632 fn paint_gutter(
633 &mut self,
634 bounds: RectF,
635 visible_bounds: RectF,
636 layout: &mut LayoutState,
637 editor: &mut Editor,
638 cx: &mut ViewContext<Editor>,
639 ) {
640 let line_height = layout.position_map.line_height;
641
642 let scroll_position = layout.position_map.snapshot.scroll_position();
643 let scroll_top = scroll_position.y() * line_height;
644
645 let show_gutter = matches!(
646 settings::get::<ProjectSettings>(cx).git.git_gutter,
647 Some(GitGutterSetting::TrackedFiles)
648 );
649
650 if show_gutter {
651 Self::paint_diff_hunks(bounds, layout, cx);
652 }
653
654 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
655 if let Some(line) = line {
656 let line_origin = bounds.origin()
657 + vec2f(
658 bounds.width() - line.width() - layout.gutter_padding,
659 ix as f32 * line_height - (scroll_top % line_height),
660 );
661
662 line.paint(line_origin, visible_bounds, line_height, cx);
663 }
664 }
665
666 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
667 if let Some(indicator) = fold_indicator.as_mut() {
668 let position = vec2f(
669 bounds.width() - layout.gutter_padding,
670 ix as f32 * line_height - (scroll_top % line_height),
671 );
672 let centering_offset = vec2f(
673 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
674 (line_height - indicator.size().y()) / 2.,
675 );
676
677 let indicator_origin = bounds.origin() + position + centering_offset;
678
679 indicator.paint(indicator_origin, visible_bounds, editor, cx);
680 }
681 }
682
683 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
684 let mut x = 0.;
685 let mut y = *row as f32 * line_height - scroll_top;
686 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
687 y += (line_height - indicator.size().y()) / 2.;
688 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, editor, cx);
689 }
690 }
691
692 fn paint_diff_hunks(bounds: RectF, layout: &mut LayoutState, cx: &mut ViewContext<Editor>) {
693 let diff_style = &theme::current(cx).editor.diff.clone();
694 let line_height = layout.position_map.line_height;
695
696 let scroll_position = layout.position_map.snapshot.scroll_position();
697 let scroll_top = scroll_position.y() * line_height;
698
699 for hunk in &layout.display_hunks {
700 let (display_row_range, status) = match hunk {
701 //TODO: This rendering is entirely a horrible hack
702 &DisplayDiffHunk::Folded { display_row: row } => {
703 let start_y = row as f32 * line_height - scroll_top;
704 let end_y = start_y + line_height;
705
706 let width = diff_style.removed_width_em * line_height;
707 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
708 let highlight_size = vec2f(width * 2., end_y - start_y);
709 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
710
711 cx.scene().push_quad(Quad {
712 bounds: highlight_bounds,
713 background: Some(diff_style.modified),
714 border: Border::new(0., Color::transparent_black()).into(),
715 corner_radii: (1. * line_height).into(),
716 });
717
718 continue;
719 }
720
721 DisplayDiffHunk::Unfolded {
722 display_row_range,
723 status,
724 } => (display_row_range, status),
725 };
726
727 let color = match status {
728 DiffHunkStatus::Added => diff_style.inserted,
729 DiffHunkStatus::Modified => diff_style.modified,
730
731 //TODO: This rendering is entirely a horrible hack
732 DiffHunkStatus::Removed => {
733 let row = display_row_range.start;
734
735 let offset = line_height / 2.;
736 let start_y = row as f32 * line_height - offset - scroll_top;
737 let end_y = start_y + line_height;
738
739 let width = diff_style.removed_width_em * line_height;
740 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
741 let highlight_size = vec2f(width * 2., end_y - start_y);
742 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
743
744 cx.scene().push_quad(Quad {
745 bounds: highlight_bounds,
746 background: Some(diff_style.deleted),
747 border: Border::new(0., Color::transparent_black()).into(),
748 corner_radii: (1. * line_height).into(),
749 });
750
751 continue;
752 }
753 };
754
755 let start_row = display_row_range.start;
756 let end_row = display_row_range.end;
757
758 let start_y = start_row as f32 * line_height - scroll_top;
759 let end_y = end_row as f32 * line_height - scroll_top;
760
761 let width = diff_style.width_em * line_height;
762 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
763 let highlight_size = vec2f(width * 2., end_y - start_y);
764 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
765
766 cx.scene().push_quad(Quad {
767 bounds: highlight_bounds,
768 background: Some(color),
769 border: Border::new(0., Color::transparent_black()).into(),
770 corner_radii: (diff_style.corner_radius * line_height).into(),
771 });
772 }
773 }
774
775 fn paint_text(
776 &mut self,
777 bounds: RectF,
778 visible_bounds: RectF,
779 layout: &mut LayoutState,
780 editor: &mut Editor,
781 cx: &mut ViewContext<Editor>,
782 ) {
783 let style = &self.style;
784 let scroll_position = layout.position_map.snapshot.scroll_position();
785 let start_row = layout.visible_display_row_range.start;
786 let scroll_top = scroll_position.y() * layout.position_map.line_height;
787 let max_glyph_width = layout.position_map.em_width;
788 let scroll_left = scroll_position.x() * max_glyph_width;
789 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
790 let line_end_overshoot = 0.15 * layout.position_map.line_height;
791 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
792
793 cx.scene().push_layer(Some(bounds));
794
795 cx.scene().push_cursor_region(CursorRegion {
796 bounds,
797 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
798 CursorStyle::PointingHand
799 } else {
800 CursorStyle::IBeam
801 },
802 });
803
804 let fold_corner_radius =
805 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
806 for (id, range, color) in layout.fold_ranges.iter() {
807 self.paint_highlighted_range(
808 range.clone(),
809 *color,
810 fold_corner_radius,
811 fold_corner_radius * 2.,
812 layout,
813 content_origin,
814 scroll_top,
815 scroll_left,
816 bounds,
817 cx,
818 );
819
820 for bound in range_to_bounds(
821 &range,
822 content_origin,
823 scroll_left,
824 scroll_top,
825 &layout.visible_display_row_range,
826 line_end_overshoot,
827 &layout.position_map,
828 ) {
829 cx.scene().push_cursor_region(CursorRegion {
830 bounds: bound,
831 style: CursorStyle::PointingHand,
832 });
833
834 let display_row = range.start.row();
835
836 let buffer_row = DisplayPoint::new(display_row, 0)
837 .to_point(&layout.position_map.snapshot.display_snapshot)
838 .row;
839
840 let view_id = cx.view_id();
841 cx.scene().push_mouse_region(
842 MouseRegion::new::<FoldMarkers>(view_id, *id as usize, bound)
843 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
844 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
845 })
846 .with_notify_on_hover(true)
847 .with_notify_on_click(true),
848 )
849 }
850 }
851
852 for (range, color) in &layout.highlighted_ranges {
853 self.paint_highlighted_range(
854 range.clone(),
855 *color,
856 0.,
857 line_end_overshoot,
858 layout,
859 content_origin,
860 scroll_top,
861 scroll_left,
862 bounds,
863 cx,
864 );
865 }
866
867 let mut cursors = SmallVec::<[Cursor; 32]>::new();
868 let corner_radius = 0.15 * layout.position_map.line_height;
869 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
870
871 for (selection_style, selections) in &layout.selections {
872 for selection in selections {
873 self.paint_highlighted_range(
874 selection.range.clone(),
875 selection_style.selection,
876 corner_radius,
877 corner_radius * 2.,
878 layout,
879 content_origin,
880 scroll_top,
881 scroll_left,
882 bounds,
883 cx,
884 );
885
886 if selection.is_local && !selection.range.is_empty() {
887 invisible_display_ranges.push(selection.range.clone());
888 }
889 if !selection.is_local || editor.show_local_cursors(cx) {
890 let cursor_position = selection.head;
891 if layout
892 .visible_display_row_range
893 .contains(&cursor_position.row())
894 {
895 let cursor_row_layout = &layout.position_map.line_layouts
896 [(cursor_position.row() - start_row) as usize]
897 .line;
898 let cursor_column = cursor_position.column() as usize;
899
900 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
901 let mut block_width =
902 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
903 if block_width == 0.0 {
904 block_width = layout.position_map.em_width;
905 }
906 let block_text = if let CursorShape::Block = selection.cursor_shape {
907 layout
908 .position_map
909 .snapshot
910 .chars_at(cursor_position)
911 .next()
912 .and_then(|(character, _)| {
913 let font_id =
914 cursor_row_layout.font_for_index(cursor_column)?;
915 let text = character.to_string();
916
917 Some(cx.text_layout_cache().layout_str(
918 &text,
919 cursor_row_layout.font_size(),
920 &[(
921 text.chars().count(),
922 RunStyle {
923 font_id,
924 color: style.background,
925 underline: Default::default(),
926 },
927 )],
928 ))
929 })
930 } else {
931 None
932 };
933
934 let x = cursor_character_x - scroll_left;
935 let y = cursor_position.row() as f32 * layout.position_map.line_height
936 - scroll_top;
937 if selection.is_newest {
938 editor.pixel_position_of_newest_cursor = Some(vec2f(
939 bounds.origin_x() + x + block_width / 2.,
940 bounds.origin_y() + y + layout.position_map.line_height / 2.,
941 ));
942 }
943 cursors.push(Cursor {
944 color: selection_style.cursor,
945 block_width,
946 origin: vec2f(x, y),
947 line_height: layout.position_map.line_height,
948 shape: selection.cursor_shape,
949 block_text,
950 });
951 }
952 }
953 }
954 }
955
956 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
957 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
958 let row = start_row + ix as u32;
959 line_with_invisibles.draw(
960 layout,
961 row,
962 scroll_top,
963 content_origin,
964 scroll_left,
965 visible_text_bounds,
966 whitespace_setting,
967 &invisible_display_ranges,
968 visible_bounds,
969 cx,
970 )
971 }
972 }
973
974 cx.scene().push_layer(Some(bounds));
975 for cursor in cursors {
976 cursor.paint(content_origin, cx);
977 }
978 cx.scene().pop_layer();
979
980 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
981 cx.scene().push_stacking_context(None, None);
982 let cursor_row_layout =
983 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
984 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
985 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
986 let mut list_origin = content_origin + vec2f(x, y);
987 let list_width = context_menu.size().x();
988 let list_height = context_menu.size().y();
989
990 // Snap the right edge of the list to the right edge of the window if
991 // its horizontal bounds overflow.
992 if list_origin.x() + list_width > cx.window_size().x() {
993 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
994 }
995
996 if list_origin.y() + list_height > bounds.max_y() {
997 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
998 }
999
1000 context_menu.paint(
1001 list_origin,
1002 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1003 editor,
1004 cx,
1005 );
1006
1007 cx.scene().pop_stacking_context();
1008 }
1009
1010 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
1011 cx.scene().push_stacking_context(None, None);
1012
1013 // This is safe because we check on layout whether the required row is available
1014 let hovered_row_layout =
1015 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1016
1017 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1018 // height. This is the size we will use to decide whether to render popovers above or below
1019 // the hovered line.
1020 let first_size = hover_popovers[0].size();
1021 let height_to_reserve = first_size.y()
1022 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
1023
1024 // Compute Hovered Point
1025 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
1026 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
1027 let hovered_point = content_origin + vec2f(x, y);
1028
1029 if hovered_point.y() - height_to_reserve > 0.0 {
1030 // There is enough space above. Render popovers above the hovered point
1031 let mut current_y = hovered_point.y();
1032 for hover_popover in hover_popovers {
1033 let size = hover_popover.size();
1034 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
1035
1036 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1037 if x_out_of_bounds < 0.0 {
1038 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1039 }
1040
1041 hover_popover.paint(
1042 popover_origin,
1043 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1044 editor,
1045 cx,
1046 );
1047
1048 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
1049 }
1050 } else {
1051 // There is not enough space above. Render popovers below the hovered point
1052 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1053 for hover_popover in hover_popovers {
1054 let size = hover_popover.size();
1055 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1056
1057 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1058 if x_out_of_bounds < 0.0 {
1059 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1060 }
1061
1062 hover_popover.paint(
1063 popover_origin,
1064 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1065 editor,
1066 cx,
1067 );
1068
1069 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1070 }
1071 }
1072
1073 cx.scene().pop_stacking_context();
1074 }
1075
1076 cx.scene().pop_layer();
1077 }
1078
1079 fn scrollbar_left(&self, bounds: &RectF) -> f32 {
1080 bounds.max_x() - self.style.theme.scrollbar.width
1081 }
1082
1083 fn paint_scrollbar(
1084 &mut self,
1085 bounds: RectF,
1086 layout: &mut LayoutState,
1087 editor: &Editor,
1088 cx: &mut ViewContext<Editor>,
1089 ) {
1090 enum ScrollbarMouseHandlers {}
1091 if layout.mode != EditorMode::Full {
1092 return;
1093 }
1094
1095 let style = &self.style.theme.scrollbar;
1096
1097 let top = bounds.min_y();
1098 let bottom = bounds.max_y();
1099 let right = bounds.max_x();
1100 let left = self.scrollbar_left(&bounds);
1101 let row_range = &layout.scrollbar_row_range;
1102 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1103
1104 let mut height = bounds.height();
1105 let mut first_row_y_offset = 0.0;
1106
1107 // Impose a minimum height on the scrollbar thumb
1108 let row_height = height / max_row;
1109 let min_thumb_height =
1110 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1111 let thumb_height = (row_range.end - row_range.start) * row_height;
1112 if thumb_height < min_thumb_height {
1113 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1114 height -= min_thumb_height - thumb_height;
1115 }
1116
1117 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1118
1119 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1120 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1121 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1122 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1123
1124 if layout.show_scrollbars {
1125 cx.scene().push_quad(Quad {
1126 bounds: track_bounds,
1127 border: style.track.border.into(),
1128 background: style.track.background_color,
1129 ..Default::default()
1130 });
1131 let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1132 let theme = theme::current(cx);
1133 let scrollbar_theme = &theme.editor.scrollbar;
1134 if layout.is_singleton && scrollbar_settings.selections {
1135 let start_anchor = Anchor::min();
1136 let end_anchor = Anchor::max();
1137 let color = scrollbar_theme.selections;
1138 let border = Border {
1139 width: 1.,
1140 color: style.thumb.border.color,
1141 overlay: false,
1142 top: false,
1143 right: true,
1144 bottom: false,
1145 left: true,
1146 };
1147 let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1148 let start_y = y_for_row(start.row() as f32);
1149 let mut end_y = y_for_row(end.row() as f32);
1150 if end_y - start_y < 1. {
1151 end_y = start_y + 1.;
1152 }
1153 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1154
1155 cx.scene().push_quad(Quad {
1156 bounds,
1157 background: Some(color),
1158 border: border.into(),
1159 corner_radii: style.thumb.corner_radii.into(),
1160 })
1161 };
1162 let background_ranges = editor
1163 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1164 start_anchor..end_anchor,
1165 &layout.position_map.snapshot,
1166 50000,
1167 );
1168 for row in background_ranges {
1169 let start = row.start();
1170 let end = row.end();
1171 push_region(*start, *end);
1172 }
1173 }
1174
1175 if layout.is_singleton && scrollbar_settings.git_diff {
1176 let diff_style = scrollbar_theme.git.clone();
1177 for hunk in layout
1178 .position_map
1179 .snapshot
1180 .buffer_snapshot
1181 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1182 {
1183 let start_display = Point::new(hunk.buffer_range.start, 0)
1184 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1185 let end_display = Point::new(hunk.buffer_range.end, 0)
1186 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1187 let start_y = y_for_row(start_display.row() as f32);
1188 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1189 y_for_row((end_display.row() + 1) as f32)
1190 } else {
1191 y_for_row((end_display.row()) as f32)
1192 };
1193
1194 if end_y - start_y < 1. {
1195 end_y = start_y + 1.;
1196 }
1197 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1198
1199 let color = match hunk.status() {
1200 DiffHunkStatus::Added => diff_style.inserted,
1201 DiffHunkStatus::Modified => diff_style.modified,
1202 DiffHunkStatus::Removed => diff_style.deleted,
1203 };
1204
1205 let border = Border {
1206 width: 1.,
1207 color: style.thumb.border.color,
1208 overlay: false,
1209 top: false,
1210 right: true,
1211 bottom: false,
1212 left: true,
1213 };
1214
1215 cx.scene().push_quad(Quad {
1216 bounds,
1217 background: Some(color),
1218 border: border.into(),
1219 corner_radii: style.thumb.corner_radii.into(),
1220 })
1221 }
1222 }
1223
1224 cx.scene().push_quad(Quad {
1225 bounds: thumb_bounds,
1226 border: style.thumb.border.into(),
1227 background: style.thumb.background_color,
1228 corner_radii: style.thumb.corner_radii.into(),
1229 });
1230 }
1231
1232 cx.scene().push_cursor_region(CursorRegion {
1233 bounds: track_bounds,
1234 style: CursorStyle::Arrow,
1235 });
1236 let region_id = cx.view_id();
1237 cx.scene().push_mouse_region(
1238 MouseRegion::new::<ScrollbarMouseHandlers>(region_id, region_id, track_bounds)
1239 .on_move(move |event, editor: &mut Editor, cx| {
1240 if event.pressed_button.is_none() {
1241 editor.scroll_manager.show_scrollbar(cx);
1242 }
1243 })
1244 .on_down(MouseButton::Left, {
1245 let row_range = row_range.clone();
1246 move |event, editor: &mut Editor, cx| {
1247 let y = event.position.y();
1248 if y < thumb_top || thumb_bottom < y {
1249 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1250 let top_row = center_row
1251 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1252 let mut position = editor.scroll_position(cx);
1253 position.set_y(top_row as f32);
1254 editor.set_scroll_position(position, cx);
1255 } else {
1256 editor.scroll_manager.show_scrollbar(cx);
1257 }
1258 }
1259 })
1260 .on_drag(MouseButton::Left, {
1261 move |event, editor: &mut Editor, cx| {
1262 if event.end {
1263 return;
1264 }
1265
1266 let y = event.prev_mouse_position.y();
1267 let new_y = event.position.y();
1268 if thumb_top < y && y < thumb_bottom {
1269 let mut position = editor.scroll_position(cx);
1270 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1271 if position.y() < 0.0 {
1272 position.set_y(0.);
1273 }
1274 editor.set_scroll_position(position, cx);
1275 }
1276 }
1277 }),
1278 );
1279 }
1280
1281 #[allow(clippy::too_many_arguments)]
1282 fn paint_highlighted_range(
1283 &self,
1284 range: Range<DisplayPoint>,
1285 color: Color,
1286 corner_radius: f32,
1287 line_end_overshoot: f32,
1288 layout: &LayoutState,
1289 content_origin: Vector2F,
1290 scroll_top: f32,
1291 scroll_left: f32,
1292 bounds: RectF,
1293 cx: &mut ViewContext<Editor>,
1294 ) {
1295 let start_row = layout.visible_display_row_range.start;
1296 let end_row = layout.visible_display_row_range.end;
1297 if range.start != range.end {
1298 let row_range = if range.end.column() == 0 {
1299 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1300 } else {
1301 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1302 };
1303
1304 let highlighted_range = HighlightedRange {
1305 color,
1306 line_height: layout.position_map.line_height,
1307 corner_radius,
1308 start_y: content_origin.y()
1309 + row_range.start as f32 * layout.position_map.line_height
1310 - scroll_top,
1311 lines: row_range
1312 .into_iter()
1313 .map(|row| {
1314 let line_layout =
1315 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1316 HighlightedRangeLine {
1317 start_x: if row == range.start.row() {
1318 content_origin.x()
1319 + line_layout.x_for_index(range.start.column() as usize)
1320 - scroll_left
1321 } else {
1322 content_origin.x() - scroll_left
1323 },
1324 end_x: if row == range.end.row() {
1325 content_origin.x()
1326 + line_layout.x_for_index(range.end.column() as usize)
1327 - scroll_left
1328 } else {
1329 content_origin.x() + line_layout.width() + line_end_overshoot
1330 - scroll_left
1331 },
1332 }
1333 })
1334 .collect(),
1335 };
1336
1337 highlighted_range.paint(bounds, cx);
1338 }
1339 }
1340
1341 fn paint_blocks(
1342 &mut self,
1343 bounds: RectF,
1344 visible_bounds: RectF,
1345 layout: &mut LayoutState,
1346 editor: &mut Editor,
1347 cx: &mut ViewContext<Editor>,
1348 ) {
1349 let scroll_position = layout.position_map.snapshot.scroll_position();
1350 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1351 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1352
1353 for block in &mut layout.blocks {
1354 let mut origin = bounds.origin()
1355 + vec2f(
1356 0.,
1357 block.row as f32 * layout.position_map.line_height - scroll_top,
1358 );
1359 if !matches!(block.style, BlockStyle::Sticky) {
1360 origin += vec2f(-scroll_left, 0.);
1361 }
1362 block.element.paint(origin, visible_bounds, editor, cx);
1363 }
1364 }
1365
1366 fn column_pixels(&self, column: usize, cx: &ViewContext<Editor>) -> f32 {
1367 let style = &self.style;
1368
1369 cx.text_layout_cache()
1370 .layout_str(
1371 " ".repeat(column).as_str(),
1372 style.text.font_size,
1373 &[(
1374 column,
1375 RunStyle {
1376 font_id: style.text.font_id,
1377 color: Color::black(),
1378 underline: Default::default(),
1379 },
1380 )],
1381 )
1382 .width()
1383 }
1384
1385 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1386 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1387 self.column_pixels(digit_count, cx)
1388 }
1389
1390 //Folds contained in a hunk are ignored apart from shrinking visual size
1391 //If a fold contains any hunks then that fold line is marked as modified
1392 fn layout_git_gutters(
1393 &self,
1394 display_rows: Range<u32>,
1395 snapshot: &EditorSnapshot,
1396 ) -> Vec<DisplayDiffHunk> {
1397 let buffer_snapshot = &snapshot.buffer_snapshot;
1398
1399 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1400 .to_point(snapshot)
1401 .row;
1402 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1403 .to_point(snapshot)
1404 .row;
1405
1406 buffer_snapshot
1407 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1408 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1409 .dedup()
1410 .collect()
1411 }
1412
1413 fn calculate_relative_line_numbers(
1414 &self,
1415 snapshot: &EditorSnapshot,
1416 rows: &Range<u32>,
1417 relative_to: Option<u32>,
1418 ) -> HashMap<u32, u32> {
1419 let mut relative_rows: HashMap<u32, u32> = Default::default();
1420 let Some(relative_to) = relative_to else {
1421 return relative_rows;
1422 };
1423
1424 let start = rows.start.min(relative_to);
1425 let end = rows.end.max(relative_to);
1426
1427 let buffer_rows = snapshot
1428 .buffer_rows(start)
1429 .take(1 + (end - start) as usize)
1430 .collect::<Vec<_>>();
1431
1432 let head_idx = relative_to - start;
1433 let mut delta = 1;
1434 let mut i = head_idx + 1;
1435 while i < buffer_rows.len() as u32 {
1436 if buffer_rows[i as usize].is_some() {
1437 if rows.contains(&(i + start)) {
1438 relative_rows.insert(i + start, delta);
1439 }
1440 delta += 1;
1441 }
1442 i += 1;
1443 }
1444 delta = 1;
1445 i = head_idx.min(buffer_rows.len() as u32 - 1);
1446 while i > 0 && buffer_rows[i as usize].is_none() {
1447 i -= 1;
1448 }
1449
1450 while i > 0 {
1451 i -= 1;
1452 if buffer_rows[i as usize].is_some() {
1453 if rows.contains(&(i + start)) {
1454 relative_rows.insert(i + start, delta);
1455 }
1456 delta += 1;
1457 }
1458 }
1459
1460 relative_rows
1461 }
1462
1463 fn layout_line_numbers(
1464 &self,
1465 rows: Range<u32>,
1466 active_rows: &BTreeMap<u32, bool>,
1467 newest_selection_head: DisplayPoint,
1468 is_singleton: bool,
1469 snapshot: &EditorSnapshot,
1470 cx: &ViewContext<Editor>,
1471 ) -> (
1472 Vec<Option<text_layout::Line>>,
1473 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1474 ) {
1475 let style = &self.style;
1476 let include_line_numbers = snapshot.mode == EditorMode::Full;
1477 let mut line_number_layouts = Vec::with_capacity(rows.len());
1478 let mut fold_statuses = Vec::with_capacity(rows.len());
1479 let mut line_number = String::new();
1480 let is_relative = settings::get::<EditorSettings>(cx).relative_line_numbers;
1481 let relative_to = if is_relative {
1482 Some(newest_selection_head.row())
1483 } else {
1484 None
1485 };
1486
1487 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1488
1489 for (ix, row) in snapshot
1490 .buffer_rows(rows.start)
1491 .take((rows.end - rows.start) as usize)
1492 .enumerate()
1493 {
1494 let display_row = rows.start + ix as u32;
1495 let (active, color) = if active_rows.contains_key(&display_row) {
1496 (true, style.line_number_active)
1497 } else {
1498 (false, style.line_number)
1499 };
1500 if let Some(buffer_row) = row {
1501 if include_line_numbers {
1502 line_number.clear();
1503 let default_number = buffer_row + 1;
1504 let number = relative_rows
1505 .get(&(ix as u32 + rows.start))
1506 .unwrap_or(&default_number);
1507 write!(&mut line_number, "{}", number).unwrap();
1508 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1509 &line_number,
1510 style.text.font_size,
1511 &[(
1512 line_number.len(),
1513 RunStyle {
1514 font_id: style.text.font_id,
1515 color,
1516 underline: Default::default(),
1517 },
1518 )],
1519 )));
1520 fold_statuses.push(
1521 is_singleton
1522 .then(|| {
1523 snapshot
1524 .fold_for_line(buffer_row)
1525 .map(|fold_status| (fold_status, buffer_row, active))
1526 })
1527 .flatten(),
1528 )
1529 }
1530 } else {
1531 fold_statuses.push(None);
1532 line_number_layouts.push(None);
1533 }
1534 }
1535
1536 (line_number_layouts, fold_statuses)
1537 }
1538
1539 fn layout_lines(
1540 &mut self,
1541 rows: Range<u32>,
1542 line_number_layouts: &[Option<Line>],
1543 snapshot: &EditorSnapshot,
1544 cx: &ViewContext<Editor>,
1545 ) -> Vec<LineWithInvisibles> {
1546 if rows.start >= rows.end {
1547 return Vec::new();
1548 }
1549
1550 // When the editor is empty and unfocused, then show the placeholder.
1551 if snapshot.is_empty() {
1552 let placeholder_style = self
1553 .style
1554 .placeholder_text
1555 .as_ref()
1556 .unwrap_or(&self.style.text);
1557 let placeholder_text = snapshot.placeholder_text();
1558 let placeholder_lines = placeholder_text
1559 .as_ref()
1560 .map_or("", AsRef::as_ref)
1561 .split('\n')
1562 .skip(rows.start as usize)
1563 .chain(iter::repeat(""))
1564 .take(rows.len());
1565 placeholder_lines
1566 .map(|line| {
1567 cx.text_layout_cache().layout_str(
1568 line,
1569 placeholder_style.font_size,
1570 &[(
1571 line.len(),
1572 RunStyle {
1573 font_id: placeholder_style.font_id,
1574 color: placeholder_style.color,
1575 underline: Default::default(),
1576 },
1577 )],
1578 )
1579 })
1580 .map(|line| LineWithInvisibles {
1581 line,
1582 invisibles: Vec::new(),
1583 })
1584 .collect()
1585 } else {
1586 let style = &self.style;
1587 let chunks = snapshot
1588 .chunks(
1589 rows.clone(),
1590 true,
1591 Some(style.theme.hint),
1592 Some(style.theme.suggestion),
1593 )
1594 .map(|chunk| {
1595 let mut highlight_style = chunk
1596 .syntax_highlight_id
1597 .and_then(|id| id.style(&style.syntax));
1598
1599 if let Some(chunk_highlight) = chunk.highlight_style {
1600 if let Some(highlight_style) = highlight_style.as_mut() {
1601 highlight_style.highlight(chunk_highlight);
1602 } else {
1603 highlight_style = Some(chunk_highlight);
1604 }
1605 }
1606
1607 let mut diagnostic_highlight = HighlightStyle::default();
1608
1609 if chunk.is_unnecessary {
1610 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1611 }
1612
1613 if let Some(severity) = chunk.diagnostic_severity {
1614 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1615 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1616 let diagnostic_style = super::diagnostic_style(severity, true, style);
1617 diagnostic_highlight.underline = Some(Underline {
1618 color: Some(diagnostic_style.message.text.color),
1619 thickness: 1.0.into(),
1620 squiggly: true,
1621 });
1622 }
1623 }
1624
1625 if let Some(highlight_style) = highlight_style.as_mut() {
1626 highlight_style.highlight(diagnostic_highlight);
1627 } else {
1628 highlight_style = Some(diagnostic_highlight);
1629 }
1630
1631 HighlightedChunk {
1632 chunk: chunk.text,
1633 style: highlight_style,
1634 is_tab: chunk.is_tab,
1635 }
1636 });
1637
1638 LineWithInvisibles::from_chunks(
1639 chunks,
1640 &style.text,
1641 cx.text_layout_cache(),
1642 cx.font_cache(),
1643 MAX_LINE_LEN,
1644 rows.len() as usize,
1645 line_number_layouts,
1646 snapshot.mode,
1647 )
1648 }
1649 }
1650
1651 #[allow(clippy::too_many_arguments)]
1652 fn layout_blocks(
1653 &mut self,
1654 rows: Range<u32>,
1655 snapshot: &EditorSnapshot,
1656 editor_width: f32,
1657 scroll_width: f32,
1658 gutter_padding: f32,
1659 gutter_width: f32,
1660 em_width: f32,
1661 text_x: f32,
1662 line_height: f32,
1663 style: &EditorStyle,
1664 line_layouts: &[LineWithInvisibles],
1665 editor: &mut Editor,
1666 cx: &mut ViewContext<Editor>,
1667 ) -> (f32, Vec<BlockLayout>) {
1668 let mut block_id = 0;
1669 let scroll_x = snapshot.scroll_anchor.offset.x();
1670 let (fixed_blocks, non_fixed_blocks) = snapshot
1671 .blocks_in_range(rows.clone())
1672 .partition::<Vec<_>, _>(|(_, block)| match block {
1673 TransformBlock::ExcerptHeader { .. } => false,
1674 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1675 });
1676 let mut render_block = |block: &TransformBlock, width: f32, block_id: usize| {
1677 let mut element = match block {
1678 TransformBlock::Custom(block) => {
1679 let align_to = block
1680 .position()
1681 .to_point(&snapshot.buffer_snapshot)
1682 .to_display_point(snapshot);
1683 let anchor_x = text_x
1684 + if rows.contains(&align_to.row()) {
1685 line_layouts[(align_to.row() - rows.start) as usize]
1686 .line
1687 .x_for_index(align_to.column() as usize)
1688 } else {
1689 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1690 .x_for_index(align_to.column() as usize)
1691 };
1692
1693 block.render(&mut BlockContext {
1694 view_context: cx,
1695 anchor_x,
1696 gutter_padding,
1697 line_height,
1698 scroll_x,
1699 gutter_width,
1700 em_width,
1701 block_id,
1702 })
1703 }
1704 TransformBlock::ExcerptHeader {
1705 id,
1706 buffer,
1707 range,
1708 starts_new_buffer,
1709 ..
1710 } => {
1711 let tooltip_style = theme::current(cx).tooltip.clone();
1712 let include_root = editor
1713 .project
1714 .as_ref()
1715 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1716 .unwrap_or_default();
1717 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1718 let jump_path = ProjectPath {
1719 worktree_id: file.worktree_id(cx),
1720 path: file.path.clone(),
1721 };
1722 let jump_anchor = range
1723 .primary
1724 .as_ref()
1725 .map_or(range.context.start, |primary| primary.start);
1726 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1727
1728 enum JumpIcon {}
1729 MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
1730 let style = style.jump_icon.style_for(state);
1731 Svg::new("icons/arrow_up_right.svg")
1732 .with_color(style.color)
1733 .constrained()
1734 .with_width(style.icon_width)
1735 .aligned()
1736 .contained()
1737 .with_style(style.container)
1738 .constrained()
1739 .with_width(style.button_width)
1740 .with_height(style.button_width)
1741 })
1742 .with_cursor_style(CursorStyle::PointingHand)
1743 .on_click(MouseButton::Left, move |_, editor, cx| {
1744 if let Some(workspace) = editor
1745 .workspace
1746 .as_ref()
1747 .and_then(|(workspace, _)| workspace.upgrade(cx))
1748 {
1749 workspace.update(cx, |workspace, cx| {
1750 Editor::jump(
1751 workspace,
1752 jump_path.clone(),
1753 jump_position,
1754 jump_anchor,
1755 cx,
1756 );
1757 });
1758 }
1759 })
1760 .with_tooltip::<JumpIcon>(
1761 (*id).into(),
1762 "Jump to Buffer".to_string(),
1763 Some(Box::new(crate::OpenExcerpts)),
1764 tooltip_style.clone(),
1765 cx,
1766 )
1767 .aligned()
1768 .flex_float()
1769 });
1770
1771 if *starts_new_buffer {
1772 let editor_font_size = style.text.font_size;
1773 let style = &style.diagnostic_path_header;
1774 let font_size = (style.text_scale_factor * editor_font_size).round();
1775
1776 let path = buffer.resolve_file_path(cx, include_root);
1777 let mut filename = None;
1778 let mut parent_path = None;
1779 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1780 if let Some(path) = path {
1781 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1782 parent_path =
1783 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1784 }
1785
1786 Flex::row()
1787 .with_child(
1788 Label::new(
1789 filename.unwrap_or_else(|| "untitled".to_string()),
1790 style.filename.text.clone().with_font_size(font_size),
1791 )
1792 .contained()
1793 .with_style(style.filename.container)
1794 .aligned(),
1795 )
1796 .with_children(parent_path.map(|path| {
1797 Label::new(path, style.path.text.clone().with_font_size(font_size))
1798 .contained()
1799 .with_style(style.path.container)
1800 .aligned()
1801 }))
1802 .with_children(jump_icon)
1803 .contained()
1804 .with_style(style.container)
1805 .with_padding_left(gutter_padding)
1806 .with_padding_right(gutter_padding)
1807 .expanded()
1808 .into_any_named("path header block")
1809 } else {
1810 let text_style = style.text.clone();
1811 Flex::row()
1812 .with_child(Label::new("⋯", text_style))
1813 .with_children(jump_icon)
1814 .contained()
1815 .with_padding_left(gutter_padding)
1816 .with_padding_right(gutter_padding)
1817 .expanded()
1818 .into_any_named("collapsed context")
1819 }
1820 }
1821 };
1822
1823 element.layout(
1824 SizeConstraint {
1825 min: Vector2F::zero(),
1826 max: vec2f(width, block.height() as f32 * line_height),
1827 },
1828 editor,
1829 cx,
1830 );
1831 element
1832 };
1833
1834 let mut fixed_block_max_width = 0f32;
1835 let mut blocks = Vec::new();
1836 for (row, block) in fixed_blocks {
1837 let element = render_block(block, f32::INFINITY, block_id);
1838 block_id += 1;
1839 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1840 blocks.push(BlockLayout {
1841 row,
1842 element,
1843 style: BlockStyle::Fixed,
1844 });
1845 }
1846 for (row, block) in non_fixed_blocks {
1847 let style = match block {
1848 TransformBlock::Custom(block) => block.style(),
1849 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1850 };
1851 let width = match style {
1852 BlockStyle::Sticky => editor_width,
1853 BlockStyle::Flex => editor_width
1854 .max(fixed_block_max_width)
1855 .max(gutter_width + scroll_width),
1856 BlockStyle::Fixed => unreachable!(),
1857 };
1858 let element = render_block(block, width, block_id);
1859 block_id += 1;
1860 blocks.push(BlockLayout {
1861 row,
1862 element,
1863 style,
1864 });
1865 }
1866 (
1867 scroll_width.max(fixed_block_max_width - gutter_width),
1868 blocks,
1869 )
1870 }
1871}
1872
1873struct HighlightedChunk<'a> {
1874 chunk: &'a str,
1875 style: Option<HighlightStyle>,
1876 is_tab: bool,
1877}
1878
1879#[derive(Debug)]
1880pub struct LineWithInvisibles {
1881 pub line: Line,
1882 invisibles: Vec<Invisible>,
1883}
1884
1885impl LineWithInvisibles {
1886 fn from_chunks<'a>(
1887 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1888 text_style: &TextStyle,
1889 text_layout_cache: &TextLayoutCache,
1890 font_cache: &Arc<FontCache>,
1891 max_line_len: usize,
1892 max_line_count: usize,
1893 line_number_layouts: &[Option<Line>],
1894 editor_mode: EditorMode,
1895 ) -> Vec<Self> {
1896 let mut layouts = Vec::with_capacity(max_line_count);
1897 let mut line = String::new();
1898 let mut invisibles = Vec::new();
1899 let mut styles = Vec::new();
1900 let mut non_whitespace_added = false;
1901 let mut row = 0;
1902 let mut line_exceeded_max_len = false;
1903 for highlighted_chunk in chunks.chain([HighlightedChunk {
1904 chunk: "\n",
1905 style: None,
1906 is_tab: false,
1907 }]) {
1908 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1909 if ix > 0 {
1910 layouts.push(Self {
1911 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1912 invisibles: invisibles.drain(..).collect(),
1913 });
1914
1915 line.clear();
1916 styles.clear();
1917 row += 1;
1918 line_exceeded_max_len = false;
1919 non_whitespace_added = false;
1920 if row == max_line_count {
1921 return layouts;
1922 }
1923 }
1924
1925 if !line_chunk.is_empty() && !line_exceeded_max_len {
1926 let text_style = if let Some(style) = highlighted_chunk.style {
1927 text_style
1928 .clone()
1929 .highlight(style, font_cache)
1930 .map(Cow::Owned)
1931 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1932 } else {
1933 Cow::Borrowed(text_style)
1934 };
1935
1936 if line.len() + line_chunk.len() > max_line_len {
1937 let mut chunk_len = max_line_len - line.len();
1938 while !line_chunk.is_char_boundary(chunk_len) {
1939 chunk_len -= 1;
1940 }
1941 line_chunk = &line_chunk[..chunk_len];
1942 line_exceeded_max_len = true;
1943 }
1944
1945 styles.push((
1946 line_chunk.len(),
1947 RunStyle {
1948 font_id: text_style.font_id,
1949 color: text_style.color,
1950 underline: text_style.underline,
1951 },
1952 ));
1953
1954 if editor_mode == EditorMode::Full {
1955 // Line wrap pads its contents with fake whitespaces,
1956 // avoid printing them
1957 let inside_wrapped_string = line_number_layouts
1958 .get(row)
1959 .and_then(|layout| layout.as_ref())
1960 .is_none();
1961 if highlighted_chunk.is_tab {
1962 if non_whitespace_added || !inside_wrapped_string {
1963 invisibles.push(Invisible::Tab {
1964 line_start_offset: line.len(),
1965 });
1966 }
1967 } else {
1968 invisibles.extend(
1969 line_chunk
1970 .chars()
1971 .enumerate()
1972 .filter(|(_, line_char)| {
1973 let is_whitespace = line_char.is_whitespace();
1974 non_whitespace_added |= !is_whitespace;
1975 is_whitespace
1976 && (non_whitespace_added || !inside_wrapped_string)
1977 })
1978 .map(|(whitespace_index, _)| Invisible::Whitespace {
1979 line_offset: line.len() + whitespace_index,
1980 }),
1981 )
1982 }
1983 }
1984
1985 line.push_str(line_chunk);
1986 }
1987 }
1988 }
1989
1990 layouts
1991 }
1992
1993 fn draw(
1994 &self,
1995 layout: &LayoutState,
1996 row: u32,
1997 scroll_top: f32,
1998 content_origin: Vector2F,
1999 scroll_left: f32,
2000 visible_text_bounds: RectF,
2001 whitespace_setting: ShowWhitespaceSetting,
2002 selection_ranges: &[Range<DisplayPoint>],
2003 visible_bounds: RectF,
2004 cx: &mut ViewContext<Editor>,
2005 ) {
2006 let line_height = layout.position_map.line_height;
2007 let line_y = row as f32 * line_height - scroll_top;
2008
2009 self.line.paint(
2010 content_origin + vec2f(-scroll_left, line_y),
2011 visible_text_bounds,
2012 line_height,
2013 cx,
2014 );
2015
2016 self.draw_invisibles(
2017 &selection_ranges,
2018 layout,
2019 content_origin,
2020 scroll_left,
2021 line_y,
2022 row,
2023 visible_bounds,
2024 line_height,
2025 whitespace_setting,
2026 cx,
2027 );
2028 }
2029
2030 fn draw_invisibles(
2031 &self,
2032 selection_ranges: &[Range<DisplayPoint>],
2033 layout: &LayoutState,
2034 content_origin: Vector2F,
2035 scroll_left: f32,
2036 line_y: f32,
2037 row: u32,
2038 visible_bounds: RectF,
2039 line_height: f32,
2040 whitespace_setting: ShowWhitespaceSetting,
2041 cx: &mut ViewContext<Editor>,
2042 ) {
2043 let allowed_invisibles_regions = match whitespace_setting {
2044 ShowWhitespaceSetting::None => return,
2045 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2046 ShowWhitespaceSetting::All => None,
2047 };
2048
2049 for invisible in &self.invisibles {
2050 let (&token_offset, invisible_symbol) = match invisible {
2051 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2052 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2053 };
2054
2055 let x_offset = self.line.x_for_index(token_offset);
2056 let invisible_offset =
2057 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
2058 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
2059
2060 if let Some(allowed_regions) = allowed_invisibles_regions {
2061 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2062 if !allowed_regions
2063 .iter()
2064 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2065 {
2066 continue;
2067 }
2068 }
2069 invisible_symbol.paint(origin, visible_bounds, line_height, cx);
2070 }
2071 }
2072}
2073
2074#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2075enum Invisible {
2076 Tab { line_start_offset: usize },
2077 Whitespace { line_offset: usize },
2078}
2079
2080impl Element<Editor> for EditorElement {
2081 type LayoutState = LayoutState;
2082 type PaintState = ();
2083
2084 fn layout(
2085 &mut self,
2086 constraint: SizeConstraint,
2087 editor: &mut Editor,
2088 cx: &mut ViewContext<Editor>,
2089 ) -> (Vector2F, Self::LayoutState) {
2090 let mut size = constraint.max;
2091 if size.x().is_infinite() {
2092 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2093 }
2094
2095 let snapshot = editor.snapshot(cx);
2096 let style = self.style.clone();
2097
2098 let line_height = (style.text.font_size * style.line_height_scalar).round();
2099
2100 let gutter_padding;
2101 let gutter_width;
2102 let gutter_margin;
2103 if snapshot.show_gutter {
2104 let em_width = style.text.em_width(cx.font_cache());
2105 gutter_padding = (em_width * style.gutter_padding_factor).round();
2106 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2107 gutter_margin = -style.text.descent(cx.font_cache());
2108 } else {
2109 gutter_padding = 0.0;
2110 gutter_width = 0.0;
2111 gutter_margin = 0.0;
2112 };
2113
2114 let text_width = size.x() - gutter_width;
2115 let em_width = style.text.em_width(cx.font_cache());
2116 let em_advance = style.text.em_advance(cx.font_cache());
2117 let overscroll = vec2f(em_width, 0.);
2118 let snapshot = {
2119 editor.set_visible_line_count(size.y() / line_height, cx);
2120
2121 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
2122 let wrap_width = match editor.soft_wrap_mode(cx) {
2123 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2124 SoftWrap::EditorWidth => editor_width,
2125 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2126 };
2127
2128 if editor.set_wrap_width(Some(wrap_width), cx) {
2129 editor.snapshot(cx)
2130 } else {
2131 snapshot
2132 }
2133 };
2134
2135 let wrap_guides = editor
2136 .wrap_guides(cx)
2137 .iter()
2138 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2139 .collect();
2140
2141 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2142 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2143 size.set_y(
2144 scroll_height
2145 .min(constraint.max_along(Axis::Vertical))
2146 .max(constraint.min_along(Axis::Vertical))
2147 .max(line_height)
2148 .min(line_height * max_lines as f32),
2149 )
2150 } else if let EditorMode::SingleLine = snapshot.mode {
2151 size.set_y(line_height.max(constraint.min_along(Axis::Vertical)))
2152 } else if size.y().is_infinite() {
2153 size.set_y(scroll_height);
2154 }
2155 let gutter_size = vec2f(gutter_width, size.y());
2156 let text_size = vec2f(text_width, size.y());
2157
2158 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
2159 let mut snapshot = editor.snapshot(cx);
2160
2161 let scroll_position = snapshot.scroll_position();
2162 // The scroll position is a fractional point, the whole number of which represents
2163 // the top of the window in terms of display rows.
2164 let start_row = scroll_position.y() as u32;
2165 let height_in_lines = size.y() / line_height;
2166 let max_row = snapshot.max_point().row();
2167
2168 // Add 1 to ensure selections bleed off screen
2169 let end_row = 1 + cmp::min(
2170 (scroll_position.y() + height_in_lines).ceil() as u32,
2171 max_row,
2172 );
2173
2174 let start_anchor = if start_row == 0 {
2175 Anchor::min()
2176 } else {
2177 snapshot
2178 .buffer_snapshot
2179 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2180 };
2181 let end_anchor = if end_row > max_row {
2182 Anchor::max()
2183 } else {
2184 snapshot
2185 .buffer_snapshot
2186 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2187 };
2188
2189 let mut selections: Vec<(SelectionStyle, Vec<SelectionLayout>)> = Vec::new();
2190 let mut active_rows = BTreeMap::new();
2191 let mut fold_ranges = Vec::new();
2192 let is_singleton = editor.is_singleton(cx);
2193
2194 let highlighted_rows = editor.highlighted_rows();
2195 let theme = theme::current(cx);
2196 let highlighted_ranges = editor.background_highlights_in_range(
2197 start_anchor..end_anchor,
2198 &snapshot.display_snapshot,
2199 theme.as_ref(),
2200 );
2201
2202 fold_ranges.extend(
2203 snapshot
2204 .folds_in_range(start_anchor..end_anchor)
2205 .map(|anchor| {
2206 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2207 (
2208 start.row,
2209 start.to_display_point(&snapshot.display_snapshot)
2210 ..anchor.end.to_display_point(&snapshot),
2211 )
2212 }),
2213 );
2214
2215 let mut newest_selection_head = None;
2216
2217 if editor.show_local_selections {
2218 let mut local_selections: Vec<Selection<Point>> = editor
2219 .selections
2220 .disjoint_in_range(start_anchor..end_anchor, cx);
2221 local_selections.extend(editor.selections.pending(cx));
2222 let mut layouts = Vec::new();
2223 let newest = editor.selections.newest(cx);
2224 for selection in local_selections.drain(..) {
2225 let is_empty = selection.start == selection.end;
2226 let is_newest = selection == newest;
2227
2228 let layout = SelectionLayout::new(
2229 selection,
2230 editor.selections.line_mode,
2231 editor.cursor_shape,
2232 &snapshot.display_snapshot,
2233 is_newest,
2234 true,
2235 );
2236 if is_newest {
2237 newest_selection_head = Some(layout.head);
2238 }
2239
2240 for row in cmp::max(layout.active_rows.start, start_row)
2241 ..=cmp::min(layout.active_rows.end, end_row)
2242 {
2243 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2244 *contains_non_empty_selection |= !is_empty;
2245 }
2246 layouts.push(layout);
2247 }
2248
2249 selections.push((style.selection, layouts));
2250 }
2251
2252 if let Some(collaboration_hub) = &editor.collaboration_hub {
2253 let mut remote_selections = HashMap::default();
2254 for selection in snapshot.remote_selections_in_range(
2255 &(start_anchor..end_anchor),
2256 collaboration_hub.as_ref(),
2257 cx,
2258 ) {
2259 let selection_style = if let Some(participant_index) = selection.participant_index {
2260 style.selection_style_for_room_participant(participant_index.0)
2261 } else {
2262 style.absent_selection
2263 };
2264
2265 // The local selections match the leader's selections.
2266 if Some(selection.peer_id) == editor.leader_peer_id {
2267 if let Some((local_selection_style, _)) = selections.first_mut() {
2268 *local_selection_style = selection_style;
2269 }
2270 continue;
2271 }
2272
2273 remote_selections
2274 .entry(selection.replica_id)
2275 .or_insert((selection_style, Vec::new()))
2276 .1
2277 .push(SelectionLayout::new(
2278 selection.selection,
2279 selection.line_mode,
2280 selection.cursor_shape,
2281 &snapshot.display_snapshot,
2282 false,
2283 false,
2284 ));
2285 }
2286
2287 selections.extend(remote_selections.into_values());
2288 }
2289
2290 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2291 let show_scrollbars = match scrollbar_settings.show {
2292 ShowScrollbar::Auto => {
2293 // Git
2294 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2295 ||
2296 // Selections
2297 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
2298 // Scrollmanager
2299 || editor.scroll_manager.scrollbars_visible()
2300 }
2301 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2302 ShowScrollbar::Always => true,
2303 ShowScrollbar::Never => false,
2304 };
2305
2306 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2307 .into_iter()
2308 .map(|(id, fold)| {
2309 let color = self
2310 .style
2311 .folds
2312 .ellipses
2313 .background
2314 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2315 .color;
2316
2317 (id, fold, color)
2318 })
2319 .collect();
2320
2321 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
2322 let newest = editor.selections.newest::<Point>(cx);
2323 SelectionLayout::new(
2324 newest,
2325 editor.selections.line_mode,
2326 editor.cursor_shape,
2327 &snapshot.display_snapshot,
2328 true,
2329 true,
2330 )
2331 .head
2332 });
2333
2334 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2335 start_row..end_row,
2336 &active_rows,
2337 head_for_relative,
2338 is_singleton,
2339 &snapshot,
2340 cx,
2341 );
2342
2343 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2344
2345 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2346
2347 let mut max_visible_line_width = 0.0;
2348 let line_layouts =
2349 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2350 for line_with_invisibles in &line_layouts {
2351 if line_with_invisibles.line.width() > max_visible_line_width {
2352 max_visible_line_width = line_with_invisibles.line.width();
2353 }
2354 }
2355
2356 let style = self.style.clone();
2357 let longest_line_width = layout_line(
2358 snapshot.longest_row(),
2359 &snapshot,
2360 &style,
2361 cx.text_layout_cache(),
2362 )
2363 .width();
2364 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2365 let em_width = style.text.em_width(cx.font_cache());
2366 let (scroll_width, blocks) = self.layout_blocks(
2367 start_row..end_row,
2368 &snapshot,
2369 size.x(),
2370 scroll_width,
2371 gutter_padding,
2372 gutter_width,
2373 em_width,
2374 gutter_width + gutter_margin,
2375 line_height,
2376 &style,
2377 &line_layouts,
2378 editor,
2379 cx,
2380 );
2381
2382 let scroll_max = vec2f(
2383 ((scroll_width - text_size.x()) / em_width).max(0.0),
2384 max_row as f32,
2385 );
2386
2387 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2388
2389 let autoscrolled = if autoscroll_horizontally {
2390 editor.autoscroll_horizontally(
2391 start_row,
2392 text_size.x(),
2393 scroll_width,
2394 em_width,
2395 &line_layouts,
2396 cx,
2397 )
2398 } else {
2399 false
2400 };
2401
2402 if clamped || autoscrolled {
2403 snapshot = editor.snapshot(cx);
2404 }
2405
2406 let style = editor.style(cx);
2407
2408 let mut context_menu = None;
2409 let mut code_actions_indicator = None;
2410 if let Some(newest_selection_head) = newest_selection_head {
2411 if (start_row..end_row).contains(&newest_selection_head.row()) {
2412 if editor.context_menu_visible() {
2413 context_menu =
2414 editor.render_context_menu(newest_selection_head, style.clone(), cx);
2415 }
2416
2417 let active = matches!(
2418 editor.context_menu,
2419 Some(crate::ContextMenu::CodeActions(_))
2420 );
2421
2422 code_actions_indicator = editor
2423 .render_code_actions_indicator(&style, active, cx)
2424 .map(|indicator| (newest_selection_head.row(), indicator));
2425 }
2426 }
2427
2428 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2429 let mut hover = editor
2430 .hover_state
2431 .render(&snapshot, &style, visible_rows, cx);
2432 let mode = editor.mode;
2433
2434 let mut fold_indicators = editor.render_fold_indicators(
2435 fold_statuses,
2436 &style,
2437 editor.gutter_hovered,
2438 line_height,
2439 gutter_margin,
2440 cx,
2441 );
2442
2443 if let Some((_, context_menu)) = context_menu.as_mut() {
2444 context_menu.layout(
2445 SizeConstraint {
2446 min: Vector2F::zero(),
2447 max: vec2f(
2448 cx.window_size().x() * 0.7,
2449 (12. * line_height).min((size.y() - line_height) / 2.),
2450 ),
2451 },
2452 editor,
2453 cx,
2454 );
2455 }
2456
2457 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2458 indicator.layout(
2459 SizeConstraint::strict_along(
2460 Axis::Vertical,
2461 line_height * style.code_actions.vertical_scale,
2462 ),
2463 editor,
2464 cx,
2465 );
2466 }
2467
2468 for fold_indicator in fold_indicators.iter_mut() {
2469 if let Some(indicator) = fold_indicator.as_mut() {
2470 indicator.layout(
2471 SizeConstraint::strict_along(
2472 Axis::Vertical,
2473 line_height * style.code_actions.vertical_scale,
2474 ),
2475 editor,
2476 cx,
2477 );
2478 }
2479 }
2480
2481 if let Some((_, hover_popovers)) = hover.as_mut() {
2482 for hover_popover in hover_popovers.iter_mut() {
2483 hover_popover.layout(
2484 SizeConstraint {
2485 min: Vector2F::zero(),
2486 max: vec2f(
2487 (120. * em_width) // Default size
2488 .min(size.x() / 2.) // Shrink to half of the editor width
2489 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2490 (16. * line_height) // Default size
2491 .min(size.y() / 2.) // Shrink to half of the editor height
2492 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2493 ),
2494 },
2495 editor,
2496 cx,
2497 );
2498 }
2499 }
2500
2501 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2502 let invisible_symbol_style = RunStyle {
2503 color: self.style.whitespace,
2504 font_id: self.style.text.font_id,
2505 underline: Default::default(),
2506 };
2507
2508 (
2509 size,
2510 LayoutState {
2511 mode,
2512 position_map: Arc::new(PositionMap {
2513 size,
2514 scroll_max,
2515 line_layouts,
2516 line_height,
2517 em_width,
2518 em_advance,
2519 snapshot,
2520 }),
2521 visible_display_row_range: start_row..end_row,
2522 wrap_guides,
2523 gutter_size,
2524 gutter_padding,
2525 text_size,
2526 scrollbar_row_range,
2527 show_scrollbars,
2528 is_singleton,
2529 max_row,
2530 gutter_margin,
2531 active_rows,
2532 highlighted_rows,
2533 highlighted_ranges,
2534 fold_ranges,
2535 line_number_layouts,
2536 display_hunks,
2537 blocks,
2538 selections,
2539 context_menu,
2540 code_actions_indicator,
2541 fold_indicators,
2542 tab_invisible: cx.text_layout_cache().layout_str(
2543 "→",
2544 invisible_symbol_font_size,
2545 &[("→".len(), invisible_symbol_style)],
2546 ),
2547 space_invisible: cx.text_layout_cache().layout_str(
2548 "•",
2549 invisible_symbol_font_size,
2550 &[("•".len(), invisible_symbol_style)],
2551 ),
2552 hover_popovers: hover,
2553 },
2554 )
2555 }
2556
2557 fn paint(
2558 &mut self,
2559 bounds: RectF,
2560 visible_bounds: RectF,
2561 layout: &mut Self::LayoutState,
2562 editor: &mut Editor,
2563 cx: &mut ViewContext<Editor>,
2564 ) -> Self::PaintState {
2565 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2566 cx.scene().push_layer(Some(visible_bounds));
2567
2568 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2569 let text_bounds = RectF::new(
2570 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2571 layout.text_size,
2572 );
2573
2574 Self::attach_mouse_handlers(
2575 &layout.position_map,
2576 layout.hover_popovers.is_some(),
2577 visible_bounds,
2578 text_bounds,
2579 gutter_bounds,
2580 bounds,
2581 cx,
2582 );
2583
2584 self.paint_background(gutter_bounds, text_bounds, layout, cx);
2585 if layout.gutter_size.x() > 0. {
2586 self.paint_gutter(gutter_bounds, visible_bounds, layout, editor, cx);
2587 }
2588 self.paint_text(text_bounds, visible_bounds, layout, editor, cx);
2589
2590 cx.scene().push_layer(Some(bounds));
2591 if !layout.blocks.is_empty() {
2592 self.paint_blocks(bounds, visible_bounds, layout, editor, cx);
2593 }
2594 self.paint_scrollbar(bounds, layout, &editor, cx);
2595 cx.scene().pop_layer();
2596 cx.scene().pop_layer();
2597 }
2598
2599 fn rect_for_text_range(
2600 &self,
2601 range_utf16: Range<usize>,
2602 bounds: RectF,
2603 _: RectF,
2604 layout: &Self::LayoutState,
2605 _: &Self::PaintState,
2606 _: &Editor,
2607 _: &ViewContext<Editor>,
2608 ) -> Option<RectF> {
2609 let text_bounds = RectF::new(
2610 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2611 layout.text_size,
2612 );
2613 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2614 let scroll_position = layout.position_map.snapshot.scroll_position();
2615 let start_row = scroll_position.y() as u32;
2616 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2617 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2618
2619 let range_start = OffsetUtf16(range_utf16.start)
2620 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2621 if range_start.row() < start_row {
2622 return None;
2623 }
2624
2625 let line = &layout
2626 .position_map
2627 .line_layouts
2628 .get((range_start.row() - start_row) as usize)?
2629 .line;
2630 let range_start_x = line.x_for_index(range_start.column() as usize);
2631 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2632 Some(RectF::new(
2633 content_origin
2634 + vec2f(
2635 range_start_x,
2636 range_start_y + layout.position_map.line_height,
2637 )
2638 - vec2f(scroll_left, scroll_top),
2639 vec2f(
2640 layout.position_map.em_width,
2641 layout.position_map.line_height,
2642 ),
2643 ))
2644 }
2645
2646 fn debug(
2647 &self,
2648 bounds: RectF,
2649 _: &Self::LayoutState,
2650 _: &Self::PaintState,
2651 _: &Editor,
2652 _: &ViewContext<Editor>,
2653 ) -> json::Value {
2654 json!({
2655 "type": "BufferElement",
2656 "bounds": bounds.to_json()
2657 })
2658 }
2659}
2660
2661type BufferRow = u32;
2662
2663pub struct LayoutState {
2664 position_map: Arc<PositionMap>,
2665 gutter_size: Vector2F,
2666 gutter_padding: f32,
2667 gutter_margin: f32,
2668 text_size: Vector2F,
2669 mode: EditorMode,
2670 wrap_guides: SmallVec<[(f32, bool); 2]>,
2671 visible_display_row_range: Range<u32>,
2672 active_rows: BTreeMap<u32, bool>,
2673 highlighted_rows: Option<Range<u32>>,
2674 line_number_layouts: Vec<Option<text_layout::Line>>,
2675 display_hunks: Vec<DisplayDiffHunk>,
2676 blocks: Vec<BlockLayout>,
2677 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2678 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2679 selections: Vec<(SelectionStyle, Vec<SelectionLayout>)>,
2680 scrollbar_row_range: Range<f32>,
2681 show_scrollbars: bool,
2682 is_singleton: bool,
2683 max_row: u32,
2684 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2685 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2686 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2687 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2688 tab_invisible: Line,
2689 space_invisible: Line,
2690}
2691
2692struct PositionMap {
2693 size: Vector2F,
2694 line_height: f32,
2695 scroll_max: Vector2F,
2696 em_width: f32,
2697 em_advance: f32,
2698 line_layouts: Vec<LineWithInvisibles>,
2699 snapshot: EditorSnapshot,
2700}
2701
2702#[derive(Debug, Copy, Clone)]
2703pub struct PointForPosition {
2704 pub previous_valid: DisplayPoint,
2705 pub next_valid: DisplayPoint,
2706 pub exact_unclipped: DisplayPoint,
2707 pub column_overshoot_after_line_end: u32,
2708}
2709
2710impl PointForPosition {
2711 #[cfg(test)]
2712 pub fn valid(valid: DisplayPoint) -> Self {
2713 Self {
2714 previous_valid: valid,
2715 next_valid: valid,
2716 exact_unclipped: valid,
2717 column_overshoot_after_line_end: 0,
2718 }
2719 }
2720
2721 pub fn as_valid(&self) -> Option<DisplayPoint> {
2722 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2723 Some(self.previous_valid)
2724 } else {
2725 None
2726 }
2727 }
2728}
2729
2730impl PositionMap {
2731 fn point_for_position(&self, text_bounds: RectF, position: Vector2F) -> PointForPosition {
2732 let scroll_position = self.snapshot.scroll_position();
2733 let position = position - text_bounds.origin();
2734 let y = position.y().max(0.0).min(self.size.y());
2735 let x = position.x() + (scroll_position.x() * self.em_width);
2736 let row = (y / self.line_height + scroll_position.y()) as u32;
2737 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2738 .line_layouts
2739 .get(row as usize - scroll_position.y() as usize)
2740 .map(|line_with_spaces| &line_with_spaces.line)
2741 {
2742 if let Some(ix) = line.index_for_x(x) {
2743 (ix as u32, 0.0)
2744 } else {
2745 (line.len() as u32, 0f32.max(x - line.width()))
2746 }
2747 } else {
2748 (0, x)
2749 };
2750
2751 let mut exact_unclipped = DisplayPoint::new(row, column);
2752 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2753 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2754
2755 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2756 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2757 PointForPosition {
2758 previous_valid,
2759 next_valid,
2760 exact_unclipped,
2761 column_overshoot_after_line_end,
2762 }
2763 }
2764}
2765
2766struct BlockLayout {
2767 row: u32,
2768 element: AnyElement<Editor>,
2769 style: BlockStyle,
2770}
2771
2772fn layout_line(
2773 row: u32,
2774 snapshot: &EditorSnapshot,
2775 style: &EditorStyle,
2776 layout_cache: &TextLayoutCache,
2777) -> text_layout::Line {
2778 let mut line = snapshot.line(row);
2779
2780 if line.len() > MAX_LINE_LEN {
2781 let mut len = MAX_LINE_LEN;
2782 while !line.is_char_boundary(len) {
2783 len -= 1;
2784 }
2785
2786 line.truncate(len);
2787 }
2788
2789 layout_cache.layout_str(
2790 &line,
2791 style.text.font_size,
2792 &[(
2793 snapshot.line_len(row) as usize,
2794 RunStyle {
2795 font_id: style.text.font_id,
2796 color: Color::black(),
2797 underline: Default::default(),
2798 },
2799 )],
2800 )
2801}
2802
2803#[derive(Debug)]
2804pub struct Cursor {
2805 origin: Vector2F,
2806 block_width: f32,
2807 line_height: f32,
2808 color: Color,
2809 shape: CursorShape,
2810 block_text: Option<Line>,
2811}
2812
2813impl Cursor {
2814 pub fn new(
2815 origin: Vector2F,
2816 block_width: f32,
2817 line_height: f32,
2818 color: Color,
2819 shape: CursorShape,
2820 block_text: Option<Line>,
2821 ) -> Cursor {
2822 Cursor {
2823 origin,
2824 block_width,
2825 line_height,
2826 color,
2827 shape,
2828 block_text,
2829 }
2830 }
2831
2832 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2833 RectF::new(
2834 self.origin + origin,
2835 vec2f(self.block_width, self.line_height),
2836 )
2837 }
2838
2839 pub fn paint(&self, origin: Vector2F, cx: &mut WindowContext) {
2840 let bounds = match self.shape {
2841 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2842 CursorShape::Block | CursorShape::Hollow => RectF::new(
2843 self.origin + origin,
2844 vec2f(self.block_width, self.line_height),
2845 ),
2846 CursorShape::Underscore => RectF::new(
2847 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2848 vec2f(self.block_width, 2.0),
2849 ),
2850 };
2851
2852 //Draw background or border quad
2853 if matches!(self.shape, CursorShape::Hollow) {
2854 cx.scene().push_quad(Quad {
2855 bounds,
2856 background: None,
2857 border: Border::all(1., self.color).into(),
2858 corner_radii: Default::default(),
2859 });
2860 } else {
2861 cx.scene().push_quad(Quad {
2862 bounds,
2863 background: Some(self.color),
2864 border: Default::default(),
2865 corner_radii: Default::default(),
2866 });
2867 }
2868
2869 if let Some(block_text) = &self.block_text {
2870 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2871 }
2872 }
2873
2874 pub fn shape(&self) -> CursorShape {
2875 self.shape
2876 }
2877}
2878
2879#[derive(Debug)]
2880pub struct HighlightedRange {
2881 pub start_y: f32,
2882 pub line_height: f32,
2883 pub lines: Vec<HighlightedRangeLine>,
2884 pub color: Color,
2885 pub corner_radius: f32,
2886}
2887
2888#[derive(Debug)]
2889pub struct HighlightedRangeLine {
2890 pub start_x: f32,
2891 pub end_x: f32,
2892}
2893
2894impl HighlightedRange {
2895 pub fn paint(&self, bounds: RectF, cx: &mut WindowContext) {
2896 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2897 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
2898 self.paint_lines(
2899 self.start_y + self.line_height,
2900 &self.lines[1..],
2901 bounds,
2902 cx,
2903 );
2904 } else {
2905 self.paint_lines(self.start_y, &self.lines, bounds, cx);
2906 }
2907 }
2908
2909 fn paint_lines(
2910 &self,
2911 start_y: f32,
2912 lines: &[HighlightedRangeLine],
2913 bounds: RectF,
2914 cx: &mut WindowContext,
2915 ) {
2916 if lines.is_empty() {
2917 return;
2918 }
2919
2920 let mut path = PathBuilder::new();
2921 let first_line = lines.first().unwrap();
2922 let last_line = lines.last().unwrap();
2923
2924 let first_top_left = vec2f(first_line.start_x, start_y);
2925 let first_top_right = vec2f(first_line.end_x, start_y);
2926
2927 let curve_height = vec2f(0., self.corner_radius);
2928 let curve_width = |start_x: f32, end_x: f32| {
2929 let max = (end_x - start_x) / 2.;
2930 let width = if max < self.corner_radius {
2931 max
2932 } else {
2933 self.corner_radius
2934 };
2935
2936 vec2f(width, 0.)
2937 };
2938
2939 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2940 path.reset(first_top_right - top_curve_width);
2941 path.curve_to(first_top_right + curve_height, first_top_right);
2942
2943 let mut iter = lines.iter().enumerate().peekable();
2944 while let Some((ix, line)) = iter.next() {
2945 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2946
2947 if let Some((_, next_line)) = iter.peek() {
2948 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2949
2950 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2951 Ordering::Equal => {
2952 path.line_to(bottom_right);
2953 }
2954 Ordering::Less => {
2955 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2956 path.line_to(bottom_right - curve_height);
2957 if self.corner_radius > 0. {
2958 path.curve_to(bottom_right - curve_width, bottom_right);
2959 }
2960 path.line_to(next_top_right + curve_width);
2961 if self.corner_radius > 0. {
2962 path.curve_to(next_top_right + curve_height, next_top_right);
2963 }
2964 }
2965 Ordering::Greater => {
2966 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2967 path.line_to(bottom_right - curve_height);
2968 if self.corner_radius > 0. {
2969 path.curve_to(bottom_right + curve_width, bottom_right);
2970 }
2971 path.line_to(next_top_right - curve_width);
2972 if self.corner_radius > 0. {
2973 path.curve_to(next_top_right + curve_height, next_top_right);
2974 }
2975 }
2976 }
2977 } else {
2978 let curve_width = curve_width(line.start_x, line.end_x);
2979 path.line_to(bottom_right - curve_height);
2980 if self.corner_radius > 0. {
2981 path.curve_to(bottom_right - curve_width, bottom_right);
2982 }
2983
2984 let bottom_left = vec2f(line.start_x, bottom_right.y());
2985 path.line_to(bottom_left + curve_width);
2986 if self.corner_radius > 0. {
2987 path.curve_to(bottom_left - curve_height, bottom_left);
2988 }
2989 }
2990 }
2991
2992 if first_line.start_x > last_line.start_x {
2993 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2994 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2995 path.line_to(second_top_left + curve_height);
2996 if self.corner_radius > 0. {
2997 path.curve_to(second_top_left + curve_width, second_top_left);
2998 }
2999 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
3000 path.line_to(first_bottom_left - curve_width);
3001 if self.corner_radius > 0. {
3002 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3003 }
3004 }
3005
3006 path.line_to(first_top_left + curve_height);
3007 if self.corner_radius > 0. {
3008 path.curve_to(first_top_left + top_curve_width, first_top_left);
3009 }
3010 path.line_to(first_top_right - top_curve_width);
3011
3012 cx.scene().push_path(path.build(self.color, Some(bounds)));
3013 }
3014}
3015
3016fn range_to_bounds(
3017 range: &Range<DisplayPoint>,
3018 content_origin: Vector2F,
3019 scroll_left: f32,
3020 scroll_top: f32,
3021 visible_row_range: &Range<u32>,
3022 line_end_overshoot: f32,
3023 position_map: &PositionMap,
3024) -> impl Iterator<Item = RectF> {
3025 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
3026
3027 if range.start == range.end {
3028 return bounds.into_iter();
3029 }
3030
3031 let start_row = visible_row_range.start;
3032 let end_row = visible_row_range.end;
3033
3034 let row_range = if range.end.column() == 0 {
3035 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
3036 } else {
3037 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
3038 };
3039
3040 let first_y =
3041 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
3042
3043 for (idx, row) in row_range.enumerate() {
3044 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
3045
3046 let start_x = if row == range.start.row() {
3047 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
3048 - scroll_left
3049 } else {
3050 content_origin.x() - scroll_left
3051 };
3052
3053 let end_x = if row == range.end.row() {
3054 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
3055 } else {
3056 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
3057 };
3058
3059 bounds.push(RectF::from_points(
3060 vec2f(start_x, first_y + position_map.line_height * idx as f32),
3061 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
3062 ))
3063 }
3064
3065 bounds.into_iter()
3066}
3067
3068pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
3069 delta.powf(1.5) / 100.0
3070}
3071
3072fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
3073 delta.powf(1.2) / 300.0
3074}
3075
3076#[cfg(test)]
3077mod tests {
3078 use super::*;
3079 use crate::{
3080 display_map::{BlockDisposition, BlockProperties},
3081 editor_tests::{init_test, update_test_language_settings},
3082 Editor, MultiBuffer,
3083 };
3084 use gpui::TestAppContext;
3085 use language::language_settings;
3086 use log::info;
3087 use std::{num::NonZeroU32, sync::Arc};
3088 use util::test::sample_text;
3089
3090 #[gpui::test]
3091 fn test_layout_line_numbers(cx: &mut TestAppContext) {
3092 init_test(cx, |_| {});
3093 let editor = cx
3094 .add_window(|cx| {
3095 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3096 Editor::new(EditorMode::Full, buffer, None, None, cx)
3097 })
3098 .root(cx);
3099 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3100
3101 let layouts = editor.update(cx, |editor, cx| {
3102 let snapshot = editor.snapshot(cx);
3103 element
3104 .layout_line_numbers(
3105 0..6,
3106 &Default::default(),
3107 DisplayPoint::new(0, 0),
3108 false,
3109 &snapshot,
3110 cx,
3111 )
3112 .0
3113 });
3114 assert_eq!(layouts.len(), 6);
3115
3116 let relative_rows = editor.update(cx, |editor, cx| {
3117 let snapshot = editor.snapshot(cx);
3118 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3119 });
3120 assert_eq!(relative_rows[&0], 3);
3121 assert_eq!(relative_rows[&1], 2);
3122 assert_eq!(relative_rows[&2], 1);
3123 // current line has no relative number
3124 assert_eq!(relative_rows[&4], 1);
3125 assert_eq!(relative_rows[&5], 2);
3126
3127 // works if cursor is before screen
3128 let relative_rows = editor.update(cx, |editor, cx| {
3129 let snapshot = editor.snapshot(cx);
3130
3131 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3132 });
3133 assert_eq!(relative_rows.len(), 3);
3134 assert_eq!(relative_rows[&3], 2);
3135 assert_eq!(relative_rows[&4], 3);
3136 assert_eq!(relative_rows[&5], 4);
3137
3138 // works if cursor is after screen
3139 let relative_rows = editor.update(cx, |editor, cx| {
3140 let snapshot = editor.snapshot(cx);
3141
3142 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3143 });
3144 assert_eq!(relative_rows.len(), 3);
3145 assert_eq!(relative_rows[&0], 5);
3146 assert_eq!(relative_rows[&1], 4);
3147 assert_eq!(relative_rows[&2], 3);
3148 }
3149
3150 #[gpui::test]
3151 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3152 init_test(cx, |_| {});
3153
3154 let editor = cx
3155 .add_window(|cx| {
3156 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3157 Editor::new(EditorMode::Full, buffer, None, None, cx)
3158 })
3159 .root(cx);
3160 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3161 let (_, state) = editor.update(cx, |editor, cx| {
3162 editor.cursor_shape = CursorShape::Block;
3163 editor.change_selections(None, cx, |s| {
3164 s.select_ranges([
3165 Point::new(0, 0)..Point::new(1, 0),
3166 Point::new(3, 2)..Point::new(3, 3),
3167 Point::new(5, 6)..Point::new(6, 0),
3168 ]);
3169 });
3170 element.layout(
3171 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3172 editor,
3173 cx,
3174 )
3175 });
3176 assert_eq!(state.selections.len(), 1);
3177 let local_selections = &state.selections[0].1;
3178 assert_eq!(local_selections.len(), 3);
3179 // moves cursor back one line
3180 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3181 assert_eq!(
3182 local_selections[0].range,
3183 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3184 );
3185
3186 // moves cursor back one column
3187 assert_eq!(
3188 local_selections[1].range,
3189 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3190 );
3191 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3192
3193 // leaves cursor on the max point
3194 assert_eq!(
3195 local_selections[2].range,
3196 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3197 );
3198 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3199
3200 // active lines does not include 1 (even though the range of the selection does)
3201 assert_eq!(
3202 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3203 vec![0, 3, 5, 6]
3204 );
3205
3206 // multi-buffer support
3207 // in DisplayPoint co-ordinates, this is what we're dealing with:
3208 // 0: [[file
3209 // 1: header]]
3210 // 2: aaaaaa
3211 // 3: bbbbbb
3212 // 4: cccccc
3213 // 5:
3214 // 6: ...
3215 // 7: ffffff
3216 // 8: gggggg
3217 // 9: hhhhhh
3218 // 10:
3219 // 11: [[file
3220 // 12: header]]
3221 // 13: bbbbbb
3222 // 14: cccccc
3223 // 15: dddddd
3224 let editor = cx
3225 .add_window(|cx| {
3226 let buffer = MultiBuffer::build_multi(
3227 [
3228 (
3229 &(sample_text(8, 6, 'a') + "\n"),
3230 vec![
3231 Point::new(0, 0)..Point::new(3, 0),
3232 Point::new(4, 0)..Point::new(7, 0),
3233 ],
3234 ),
3235 (
3236 &(sample_text(8, 6, 'a') + "\n"),
3237 vec![Point::new(1, 0)..Point::new(3, 0)],
3238 ),
3239 ],
3240 cx,
3241 );
3242 Editor::new(EditorMode::Full, buffer, None, None, cx)
3243 })
3244 .root(cx);
3245 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3246 let (_, state) = editor.update(cx, |editor, cx| {
3247 editor.cursor_shape = CursorShape::Block;
3248 editor.change_selections(None, cx, |s| {
3249 s.select_display_ranges([
3250 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3251 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3252 ]);
3253 });
3254 element.layout(
3255 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3256 editor,
3257 cx,
3258 )
3259 });
3260
3261 assert_eq!(state.selections.len(), 1);
3262 let local_selections = &state.selections[0].1;
3263 assert_eq!(local_selections.len(), 2);
3264
3265 // moves cursor on excerpt boundary back a line
3266 // and doesn't allow selection to bleed through
3267 assert_eq!(
3268 local_selections[0].range,
3269 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3270 );
3271 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3272
3273 // moves cursor on buffer boundary back two lines
3274 // and doesn't allow selection to bleed through
3275 assert_eq!(
3276 local_selections[1].range,
3277 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3278 );
3279 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3280 }
3281
3282 #[gpui::test]
3283 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3284 init_test(cx, |_| {});
3285
3286 let editor = cx
3287 .add_window(|cx| {
3288 let buffer = MultiBuffer::build_simple("", cx);
3289 Editor::new(EditorMode::Full, buffer, None, None, cx)
3290 })
3291 .root(cx);
3292
3293 editor.update(cx, |editor, cx| {
3294 editor.set_placeholder_text("hello", cx);
3295 editor.insert_blocks(
3296 [BlockProperties {
3297 style: BlockStyle::Fixed,
3298 disposition: BlockDisposition::Above,
3299 height: 3,
3300 position: Anchor::min(),
3301 render: Arc::new(|_| Empty::new().into_any()),
3302 }],
3303 None,
3304 cx,
3305 );
3306
3307 // Blur the editor so that it displays placeholder text.
3308 cx.blur();
3309 });
3310
3311 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3312 let (size, mut state) = editor.update(cx, |editor, cx| {
3313 element.layout(
3314 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
3315 editor,
3316 cx,
3317 )
3318 });
3319
3320 assert_eq!(state.position_map.line_layouts.len(), 4);
3321 assert_eq!(
3322 state
3323 .line_number_layouts
3324 .iter()
3325 .map(Option::is_some)
3326 .collect::<Vec<_>>(),
3327 &[false, false, false, true]
3328 );
3329
3330 // Don't panic.
3331 let bounds = RectF::new(Default::default(), size);
3332 editor.update(cx, |editor, cx| {
3333 element.paint(bounds, bounds, &mut state, editor, cx);
3334 });
3335 }
3336
3337 #[gpui::test]
3338 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3339 const TAB_SIZE: u32 = 4;
3340
3341 let input_text = "\t \t|\t| a b";
3342 let expected_invisibles = vec![
3343 Invisible::Tab {
3344 line_start_offset: 0,
3345 },
3346 Invisible::Whitespace {
3347 line_offset: TAB_SIZE as usize,
3348 },
3349 Invisible::Tab {
3350 line_start_offset: TAB_SIZE as usize + 1,
3351 },
3352 Invisible::Tab {
3353 line_start_offset: TAB_SIZE as usize * 2 + 1,
3354 },
3355 Invisible::Whitespace {
3356 line_offset: TAB_SIZE as usize * 3 + 1,
3357 },
3358 Invisible::Whitespace {
3359 line_offset: TAB_SIZE as usize * 3 + 3,
3360 },
3361 ];
3362 assert_eq!(
3363 expected_invisibles.len(),
3364 input_text
3365 .chars()
3366 .filter(|initial_char| initial_char.is_whitespace())
3367 .count(),
3368 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3369 );
3370
3371 init_test(cx, |s| {
3372 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3373 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3374 });
3375
3376 let actual_invisibles =
3377 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3378
3379 assert_eq!(expected_invisibles, actual_invisibles);
3380 }
3381
3382 #[gpui::test]
3383 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3384 init_test(cx, |s| {
3385 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3386 s.defaults.tab_size = NonZeroU32::new(4);
3387 });
3388
3389 for editor_mode_without_invisibles in [
3390 EditorMode::SingleLine,
3391 EditorMode::AutoHeight { max_lines: 100 },
3392 ] {
3393 let invisibles = collect_invisibles_from_new_editor(
3394 cx,
3395 editor_mode_without_invisibles,
3396 "\t\t\t| | a b",
3397 500.0,
3398 );
3399 assert!(invisibles.is_empty(),
3400 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3401 }
3402 }
3403
3404 #[gpui::test]
3405 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3406 let tab_size = 4;
3407 let input_text = "a\tbcd ".repeat(9);
3408 let repeated_invisibles = [
3409 Invisible::Tab {
3410 line_start_offset: 1,
3411 },
3412 Invisible::Whitespace {
3413 line_offset: tab_size as usize + 3,
3414 },
3415 Invisible::Whitespace {
3416 line_offset: tab_size as usize + 4,
3417 },
3418 Invisible::Whitespace {
3419 line_offset: tab_size as usize + 5,
3420 },
3421 ];
3422 let expected_invisibles = std::iter::once(repeated_invisibles)
3423 .cycle()
3424 .take(9)
3425 .flatten()
3426 .collect::<Vec<_>>();
3427 assert_eq!(
3428 expected_invisibles.len(),
3429 input_text
3430 .chars()
3431 .filter(|initial_char| initial_char.is_whitespace())
3432 .count(),
3433 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3434 );
3435 info!("Expected invisibles: {expected_invisibles:?}");
3436
3437 init_test(cx, |_| {});
3438
3439 // Put the same string with repeating whitespace pattern into editors of various size,
3440 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3441 let resize_step = 10.0;
3442 let mut editor_width = 200.0;
3443 while editor_width <= 1000.0 {
3444 update_test_language_settings(cx, |s| {
3445 s.defaults.tab_size = NonZeroU32::new(tab_size);
3446 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3447 s.defaults.preferred_line_length = Some(editor_width as u32);
3448 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3449 });
3450
3451 let actual_invisibles =
3452 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3453
3454 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3455 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3456 let mut i = 0;
3457 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3458 i = actual_index;
3459 match expected_invisibles.get(i) {
3460 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3461 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3462 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3463 _ => {
3464 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3465 }
3466 },
3467 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3468 }
3469 }
3470 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3471 assert!(
3472 missing_expected_invisibles.is_empty(),
3473 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3474 );
3475
3476 editor_width += resize_step;
3477 }
3478 }
3479
3480 fn collect_invisibles_from_new_editor(
3481 cx: &mut TestAppContext,
3482 editor_mode: EditorMode,
3483 input_text: &str,
3484 editor_width: f32,
3485 ) -> Vec<Invisible> {
3486 info!(
3487 "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
3488 );
3489 let editor = cx
3490 .add_window(|cx| {
3491 let buffer = MultiBuffer::build_simple(&input_text, cx);
3492 Editor::new(editor_mode, buffer, None, None, cx)
3493 })
3494 .root(cx);
3495
3496 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3497 let (_, layout_state) = editor.update(cx, |editor, cx| {
3498 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3499 editor.set_wrap_width(Some(editor_width), cx);
3500
3501 element.layout(
3502 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3503 editor,
3504 cx,
3505 )
3506 });
3507
3508 layout_state
3509 .position_map
3510 .line_layouts
3511 .iter()
3512 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3513 .flatten()
3514 .cloned()
3515 .collect()
3516 }
3517}