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 git::{diff_hunk_to_display, DisplayDiffHunk},
9 hover_popover::{
10 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
11 MIN_POPOVER_LINE_HEIGHT,
12 },
13 link_go_to_definition::{
14 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
15 },
16 mouse_context_menu, EditorStyle, GutterHover, UnfoldAt,
17};
18use clock::ReplicaId;
19use collections::{BTreeMap, HashMap};
20use git::diff::DiffHunkStatus;
21use gpui::{
22 color::Color,
23 elements::*,
24 fonts::{HighlightStyle, TextStyle, Underline},
25 geometry::{
26 rect::RectF,
27 vector::{vec2f, Vector2F},
28 PathBuilder,
29 },
30 json::{self, ToJson},
31 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
32 text_layout::{self, Line, RunStyle, TextLayoutCache},
33 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
34 MouseRegion, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
35};
36use itertools::Itertools;
37use json::json;
38use language::{Bias, CursorShape, DiagnosticSeverity, OffsetUtf16, Selection};
39use project::ProjectPath;
40use settings::{GitGutter, Settings, ShowWhitespaces};
41use smallvec::SmallVec;
42use std::{
43 borrow::Cow,
44 cmp::{self, Ordering},
45 fmt::Write,
46 iter,
47 ops::Range,
48 sync::Arc,
49};
50use workspace::item::Item;
51
52enum FoldMarkers {}
53
54struct SelectionLayout {
55 head: DisplayPoint,
56 cursor_shape: CursorShape,
57 range: Range<DisplayPoint>,
58}
59
60impl SelectionLayout {
61 fn new<T: ToPoint + ToDisplayPoint + Clone>(
62 selection: Selection<T>,
63 line_mode: bool,
64 cursor_shape: CursorShape,
65 map: &DisplaySnapshot,
66 ) -> Self {
67 if line_mode {
68 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
69 let point_range = map.expand_to_line(selection.range());
70 Self {
71 head: selection.head().to_display_point(map),
72 cursor_shape,
73 range: point_range.start.to_display_point(map)
74 ..point_range.end.to_display_point(map),
75 }
76 } else {
77 let selection = selection.map(|p| p.to_display_point(map));
78 Self {
79 head: selection.head(),
80 cursor_shape,
81 range: selection.range(),
82 }
83 }
84 }
85}
86
87#[derive(Clone)]
88pub struct EditorElement {
89 style: Arc<EditorStyle>,
90}
91
92impl EditorElement {
93 pub fn new(style: EditorStyle) -> Self {
94 Self {
95 style: Arc::new(style),
96 }
97 }
98
99 fn attach_mouse_handlers(
100 scene: &mut SceneBuilder,
101 position_map: &Arc<PositionMap>,
102 has_popovers: bool,
103 visible_bounds: RectF,
104 text_bounds: RectF,
105 gutter_bounds: RectF,
106 bounds: RectF,
107 cx: &mut ViewContext<Editor>,
108 ) {
109 enum EditorElementMouseHandlers {}
110 scene.push_mouse_region(
111 MouseRegion::new::<EditorElementMouseHandlers>(
112 cx.view_id(),
113 cx.view_id(),
114 visible_bounds,
115 )
116 .on_down(MouseButton::Left, {
117 let position_map = position_map.clone();
118 move |event, editor, cx| {
119 if !Self::mouse_down(
120 editor,
121 event.platform_event,
122 position_map.as_ref(),
123 text_bounds,
124 gutter_bounds,
125 cx,
126 ) {
127 cx.propagate_event();
128 }
129 }
130 })
131 .on_down(MouseButton::Right, {
132 let position_map = position_map.clone();
133 move |event, editor, cx| {
134 if !Self::mouse_right_down(
135 editor,
136 event.position,
137 position_map.as_ref(),
138 text_bounds,
139 cx,
140 ) {
141 cx.propagate_event();
142 }
143 }
144 })
145 .on_up(MouseButton::Left, {
146 let position_map = position_map.clone();
147 move |event, editor, cx| {
148 if !Self::mouse_up(
149 editor,
150 event.position,
151 event.cmd,
152 event.shift,
153 position_map.as_ref(),
154 text_bounds,
155 cx,
156 ) {
157 cx.propagate_event()
158 }
159 }
160 })
161 .on_drag(MouseButton::Left, {
162 let position_map = position_map.clone();
163 move |event, editor, cx| {
164 if !Self::mouse_dragged(
165 editor,
166 event.platform_event,
167 position_map.as_ref(),
168 text_bounds,
169 cx,
170 ) {
171 cx.propagate_event()
172 }
173 }
174 })
175 .on_move({
176 let position_map = position_map.clone();
177 move |event, editor, cx| {
178 if !Self::mouse_moved(
179 editor,
180 event.platform_event,
181 &position_map,
182 text_bounds,
183 cx,
184 ) {
185 cx.propagate_event()
186 }
187 }
188 })
189 .on_move_out(move |_, editor: &mut Editor, cx| {
190 if has_popovers {
191 hide_hover(editor, cx);
192 }
193 })
194 .on_scroll({
195 let position_map = position_map.clone();
196 move |event, editor, cx| {
197 if !Self::scroll(
198 editor,
199 event.position,
200 *event.delta.raw(),
201 event.delta.precise(),
202 &position_map,
203 bounds,
204 cx,
205 ) {
206 cx.propagate_event()
207 }
208 }
209 }),
210 );
211
212 enum GutterHandlers {}
213 scene.push_mouse_region(
214 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
215 .on_hover(|hover, editor: &mut Editor, cx| {
216 editor.gutter_hover(
217 &GutterHover {
218 hovered: hover.started,
219 },
220 cx,
221 );
222 }),
223 )
224 }
225
226 fn mouse_down(
227 editor: &mut Editor,
228 MouseButtonEvent {
229 position,
230 modifiers:
231 Modifiers {
232 shift,
233 ctrl,
234 alt,
235 cmd,
236 ..
237 },
238 mut click_count,
239 ..
240 }: MouseButtonEvent,
241 position_map: &PositionMap,
242 text_bounds: RectF,
243 gutter_bounds: RectF,
244 cx: &mut EventContext<Editor>,
245 ) -> bool {
246 if gutter_bounds.contains_point(position) {
247 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
248 } else if !text_bounds.contains_point(position) {
249 return false;
250 }
251
252 let (position, target_position) = position_map.point_for_position(text_bounds, position);
253
254 if shift && alt {
255 editor.select(
256 SelectPhase::BeginColumnar {
257 position,
258 goal_column: target_position.column(),
259 },
260 cx,
261 );
262 } else if shift && !ctrl && !alt && !cmd {
263 editor.select(
264 SelectPhase::Extend {
265 position,
266 click_count,
267 },
268 cx,
269 );
270 } else {
271 editor.select(
272 SelectPhase::Begin {
273 position,
274 add: alt,
275 click_count,
276 },
277 cx,
278 );
279 }
280
281 true
282 }
283
284 fn mouse_right_down(
285 editor: &mut Editor,
286 position: Vector2F,
287 position_map: &PositionMap,
288 text_bounds: RectF,
289 cx: &mut EventContext<Editor>,
290 ) -> bool {
291 if !text_bounds.contains_point(position) {
292 return false;
293 }
294
295 let (point, _) = position_map.point_for_position(text_bounds, position);
296 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
297 true
298 }
299
300 fn mouse_up(
301 editor: &mut Editor,
302 position: Vector2F,
303 cmd: bool,
304 shift: bool,
305 position_map: &PositionMap,
306 text_bounds: RectF,
307 cx: &mut EventContext<Editor>,
308 ) -> bool {
309 let end_selection = editor.has_pending_selection();
310 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
311
312 if end_selection {
313 editor.select(SelectPhase::End, cx);
314 }
315
316 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
317 let (point, target_point) = position_map.point_for_position(text_bounds, position);
318
319 if point == target_point {
320 if shift {
321 go_to_fetched_type_definition(editor, point, cx);
322 } else {
323 go_to_fetched_definition(editor, point, cx);
324 }
325
326 return true;
327 }
328 }
329
330 end_selection
331 }
332
333 fn mouse_dragged(
334 editor: &mut Editor,
335 MouseMovedEvent {
336 modifiers: Modifiers { cmd, shift, .. },
337 position,
338 ..
339 }: MouseMovedEvent,
340 position_map: &PositionMap,
341 text_bounds: RectF,
342 cx: &mut EventContext<Editor>,
343 ) -> bool {
344 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
345 // Don't trigger hover popover if mouse is hovering over context menu
346 let point = if text_bounds.contains_point(position) {
347 let (point, target_point) = position_map.point_for_position(text_bounds, position);
348 if point == target_point {
349 Some(point)
350 } else {
351 None
352 }
353 } else {
354 None
355 };
356
357 update_go_to_definition_link(editor, point, cmd, shift, cx);
358
359 if editor.has_pending_selection() {
360 let mut scroll_delta = Vector2F::zero();
361
362 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
363 let top = text_bounds.origin_y() + vertical_margin;
364 let bottom = text_bounds.lower_left().y() - vertical_margin;
365 if position.y() < top {
366 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
367 }
368 if position.y() > bottom {
369 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
370 }
371
372 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
373 let left = text_bounds.origin_x() + horizontal_margin;
374 let right = text_bounds.upper_right().x() - horizontal_margin;
375 if position.x() < left {
376 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
377 left - position.x(),
378 ))
379 }
380 if position.x() > right {
381 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
382 position.x() - right,
383 ))
384 }
385
386 let (position, target_position) =
387 position_map.point_for_position(text_bounds, position);
388
389 editor.select(
390 SelectPhase::Update {
391 position,
392 goal_column: target_position.column(),
393 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
394 .clamp(Vector2F::zero(), position_map.scroll_max),
395 },
396 cx,
397 );
398 hover_at(editor, point, cx);
399 true
400 } else {
401 hover_at(editor, point, cx);
402 false
403 }
404 }
405
406 fn mouse_moved(
407 editor: &mut Editor,
408 MouseMovedEvent {
409 modifiers: Modifiers { shift, cmd, .. },
410 position,
411 ..
412 }: MouseMovedEvent,
413 position_map: &PositionMap,
414 text_bounds: RectF,
415 cx: &mut ViewContext<Editor>,
416 ) -> bool {
417 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
418 // Don't trigger hover popover if mouse is hovering over context menu
419 let point = position_to_display_point(position, text_bounds, position_map);
420
421 update_go_to_definition_link(editor, point, cmd, shift, cx);
422 hover_at(editor, point, cx);
423
424 true
425 }
426
427 fn scroll(
428 editor: &mut Editor,
429 position: Vector2F,
430 mut delta: Vector2F,
431 precise: bool,
432 position_map: &PositionMap,
433 bounds: RectF,
434 cx: &mut ViewContext<Editor>,
435 ) -> bool {
436 if !bounds.contains_point(position) {
437 return false;
438 }
439
440 let line_height = position_map.line_height;
441 let max_glyph_width = position_map.em_width;
442
443 let axis = if precise {
444 //Trackpad
445 position_map.snapshot.ongoing_scroll.filter(&mut delta)
446 } else {
447 //Not trackpad
448 delta *= vec2f(max_glyph_width, line_height);
449 None //Resets ongoing scroll
450 };
451
452 let scroll_position = position_map.snapshot.scroll_position();
453 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
454 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
455 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
456 editor.scroll(scroll_position, axis, cx);
457
458 true
459 }
460
461 fn paint_background(
462 &self,
463 scene: &mut SceneBuilder,
464 gutter_bounds: RectF,
465 text_bounds: RectF,
466 layout: &LayoutState,
467 ) {
468 let bounds = gutter_bounds.union_rect(text_bounds);
469 let scroll_top =
470 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
471 scene.push_quad(Quad {
472 bounds: gutter_bounds,
473 background: Some(self.style.gutter_background),
474 border: Border::new(0., Color::transparent_black()),
475 corner_radius: 0.,
476 });
477 scene.push_quad(Quad {
478 bounds: text_bounds,
479 background: Some(self.style.background),
480 border: Border::new(0., Color::transparent_black()),
481 corner_radius: 0.,
482 });
483
484 if let EditorMode::Full = layout.mode {
485 let mut active_rows = layout.active_rows.iter().peekable();
486 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
487 let mut end_row = *start_row;
488 while active_rows.peek().map_or(false, |r| {
489 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
490 }) {
491 active_rows.next().unwrap();
492 end_row += 1;
493 }
494
495 if !contains_non_empty_selection {
496 let origin = vec2f(
497 bounds.origin_x(),
498 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
499 - scroll_top,
500 );
501 let size = vec2f(
502 bounds.width(),
503 layout.position_map.line_height * (end_row - start_row + 1) as f32,
504 );
505 scene.push_quad(Quad {
506 bounds: RectF::new(origin, size),
507 background: Some(self.style.active_line_background),
508 border: Border::default(),
509 corner_radius: 0.,
510 });
511 }
512 }
513
514 if let Some(highlighted_rows) = &layout.highlighted_rows {
515 let origin = vec2f(
516 bounds.origin_x(),
517 bounds.origin_y()
518 + (layout.position_map.line_height * highlighted_rows.start as f32)
519 - scroll_top,
520 );
521 let size = vec2f(
522 bounds.width(),
523 layout.position_map.line_height * highlighted_rows.len() as f32,
524 );
525 scene.push_quad(Quad {
526 bounds: RectF::new(origin, size),
527 background: Some(self.style.highlighted_line_background),
528 border: Border::default(),
529 corner_radius: 0.,
530 });
531 }
532 }
533 }
534
535 fn paint_gutter(
536 &mut self,
537 scene: &mut SceneBuilder,
538 bounds: RectF,
539 visible_bounds: RectF,
540 layout: &mut LayoutState,
541 editor: &mut Editor,
542 cx: &mut ViewContext<Editor>,
543 ) {
544 let line_height = layout.position_map.line_height;
545
546 let scroll_position = layout.position_map.snapshot.scroll_position();
547 let scroll_top = scroll_position.y() * line_height;
548
549 let show_gutter = matches!(
550 &cx.global::<Settings>()
551 .git_overrides
552 .git_gutter
553 .unwrap_or_default(),
554 GitGutter::TrackedFiles
555 );
556
557 if show_gutter {
558 Self::paint_diff_hunks(scene, bounds, layout, cx);
559 }
560
561 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
562 if let Some(line) = line {
563 let line_origin = bounds.origin()
564 + vec2f(
565 bounds.width() - line.width() - layout.gutter_padding,
566 ix as f32 * line_height - (scroll_top % line_height),
567 );
568
569 line.paint(scene, line_origin, visible_bounds, line_height, cx);
570 }
571 }
572
573 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
574 if let Some(indicator) = fold_indicator.as_mut() {
575 let position = vec2f(
576 bounds.width() - layout.gutter_padding,
577 ix as f32 * line_height - (scroll_top % line_height),
578 );
579 let centering_offset = vec2f(
580 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
581 (line_height - indicator.size().y()) / 2.,
582 );
583
584 let indicator_origin = bounds.origin() + position + centering_offset;
585
586 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
587 }
588 }
589
590 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
591 let mut x = 0.;
592 let mut y = *row as f32 * line_height - scroll_top;
593 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
594 y += (line_height - indicator.size().y()) / 2.;
595 indicator.paint(
596 scene,
597 bounds.origin() + vec2f(x, y),
598 visible_bounds,
599 editor,
600 cx,
601 );
602 }
603 }
604
605 fn paint_diff_hunks(
606 scene: &mut SceneBuilder,
607 bounds: RectF,
608 layout: &mut LayoutState,
609 cx: &mut ViewContext<Editor>,
610 ) {
611 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
612 let line_height = layout.position_map.line_height;
613
614 let scroll_position = layout.position_map.snapshot.scroll_position();
615 let scroll_top = scroll_position.y() * line_height;
616
617 for hunk in &layout.display_hunks {
618 let (display_row_range, status) = match hunk {
619 //TODO: This rendering is entirely a horrible hack
620 &DisplayDiffHunk::Folded { display_row: row } => {
621 let start_y = row as f32 * line_height - scroll_top;
622 let end_y = start_y + line_height;
623
624 let width = diff_style.removed_width_em * line_height;
625 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
626 let highlight_size = vec2f(width * 2., end_y - start_y);
627 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
628
629 scene.push_quad(Quad {
630 bounds: highlight_bounds,
631 background: Some(diff_style.modified),
632 border: Border::new(0., Color::transparent_black()),
633 corner_radius: 1. * line_height,
634 });
635
636 continue;
637 }
638
639 DisplayDiffHunk::Unfolded {
640 display_row_range,
641 status,
642 } => (display_row_range, status),
643 };
644
645 let color = match status {
646 DiffHunkStatus::Added => diff_style.inserted,
647 DiffHunkStatus::Modified => diff_style.modified,
648
649 //TODO: This rendering is entirely a horrible hack
650 DiffHunkStatus::Removed => {
651 let row = *display_row_range.start();
652
653 let offset = line_height / 2.;
654 let start_y = row as f32 * line_height - offset - scroll_top;
655 let end_y = start_y + line_height;
656
657 let width = diff_style.removed_width_em * line_height;
658 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
659 let highlight_size = vec2f(width * 2., end_y - start_y);
660 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
661
662 scene.push_quad(Quad {
663 bounds: highlight_bounds,
664 background: Some(diff_style.deleted),
665 border: Border::new(0., Color::transparent_black()),
666 corner_radius: 1. * line_height,
667 });
668
669 continue;
670 }
671 };
672
673 let start_row = *display_row_range.start();
674 let end_row = *display_row_range.end();
675
676 let start_y = start_row as f32 * line_height - scroll_top;
677 let end_y = end_row as f32 * line_height - scroll_top + line_height;
678
679 let width = diff_style.width_em * line_height;
680 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
681 let highlight_size = vec2f(width * 2., end_y - start_y);
682 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
683
684 scene.push_quad(Quad {
685 bounds: highlight_bounds,
686 background: Some(color),
687 border: Border::new(0., Color::transparent_black()),
688 corner_radius: diff_style.corner_radius * line_height,
689 });
690 }
691 }
692
693 fn paint_text(
694 &mut self,
695 scene: &mut SceneBuilder,
696 bounds: RectF,
697 visible_bounds: RectF,
698 layout: &mut LayoutState,
699 editor: &mut Editor,
700 cx: &mut ViewContext<Editor>,
701 ) {
702 let style = &self.style;
703 let local_replica_id = editor.replica_id(cx);
704 let scroll_position = layout.position_map.snapshot.scroll_position();
705 let start_row = layout.visible_display_row_range.start;
706 let scroll_top = scroll_position.y() * layout.position_map.line_height;
707 let max_glyph_width = layout.position_map.em_width;
708 let scroll_left = scroll_position.x() * max_glyph_width;
709 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
710 let line_end_overshoot = 0.15 * layout.position_map.line_height;
711
712 scene.push_layer(Some(bounds));
713
714 scene.push_cursor_region(CursorRegion {
715 bounds,
716 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
717 CursorStyle::PointingHand
718 } else {
719 CursorStyle::IBeam
720 },
721 });
722
723 let fold_corner_radius =
724 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
725 for (id, range, color) in layout.fold_ranges.iter() {
726 self.paint_highlighted_range(
727 scene,
728 range.clone(),
729 *color,
730 fold_corner_radius,
731 fold_corner_radius * 2.,
732 layout,
733 content_origin,
734 scroll_top,
735 scroll_left,
736 bounds,
737 );
738
739 for bound in range_to_bounds(
740 &range,
741 content_origin,
742 scroll_left,
743 scroll_top,
744 &layout.visible_display_row_range,
745 line_end_overshoot,
746 &layout.position_map,
747 ) {
748 scene.push_cursor_region(CursorRegion {
749 bounds: bound,
750 style: CursorStyle::PointingHand,
751 });
752
753 let display_row = range.start.row();
754
755 let buffer_row = DisplayPoint::new(display_row, 0)
756 .to_point(&layout.position_map.snapshot.display_snapshot)
757 .row;
758
759 scene.push_mouse_region(
760 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
761 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
762 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
763 })
764 .with_notify_on_hover(true)
765 .with_notify_on_click(true),
766 )
767 }
768 }
769
770 for (range, color) in &layout.highlighted_ranges {
771 self.paint_highlighted_range(
772 scene,
773 range.clone(),
774 *color,
775 0.,
776 line_end_overshoot,
777 layout,
778 content_origin,
779 scroll_top,
780 scroll_left,
781 bounds,
782 );
783 }
784
785 let mut cursors = SmallVec::<[Cursor; 32]>::new();
786 let corner_radius = 0.15 * layout.position_map.line_height;
787 let mut selection_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
788
789 for (replica_id, selections) in &layout.selections {
790 let selection_style = style.replica_selection_style(*replica_id);
791
792 for selection in selections {
793 if !selection.range.is_empty() {
794 selection_ranges.push(selection.range.clone());
795 }
796 self.paint_highlighted_range(
797 scene,
798 selection.range.clone(),
799 selection_style.selection,
800 corner_radius,
801 corner_radius * 2.,
802 layout,
803 content_origin,
804 scroll_top,
805 scroll_left,
806 bounds,
807 );
808
809 if editor.show_local_cursors(cx) || *replica_id != local_replica_id {
810 let cursor_position = selection.head;
811 if layout
812 .visible_display_row_range
813 .contains(&cursor_position.row())
814 {
815 let cursor_row_layout = &layout.position_map.line_layouts
816 [(cursor_position.row() - start_row) as usize]
817 .line;
818 let cursor_column = cursor_position.column() as usize;
819
820 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
821 let mut block_width =
822 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
823 if block_width == 0.0 {
824 block_width = layout.position_map.em_width;
825 }
826 let block_text = if let CursorShape::Block = selection.cursor_shape {
827 layout
828 .position_map
829 .snapshot
830 .chars_at(cursor_position)
831 .next()
832 .and_then(|(character, _)| {
833 let font_id =
834 cursor_row_layout.font_for_index(cursor_column)?;
835 let text = character.to_string();
836
837 Some(cx.text_layout_cache().layout_str(
838 &text,
839 cursor_row_layout.font_size(),
840 &[(
841 text.len(),
842 RunStyle {
843 font_id,
844 color: style.background,
845 underline: Default::default(),
846 },
847 )],
848 ))
849 })
850 } else {
851 None
852 };
853
854 let x = cursor_character_x - scroll_left;
855 let y = cursor_position.row() as f32 * layout.position_map.line_height
856 - scroll_top;
857 cursors.push(Cursor {
858 color: selection_style.cursor,
859 block_width,
860 origin: vec2f(x, y),
861 line_height: layout.position_map.line_height,
862 shape: selection.cursor_shape,
863 block_text,
864 });
865 }
866 }
867 }
868 }
869
870 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
871 draw_line_glyphs(
872 layout,
873 start_row,
874 scroll_top,
875 scene,
876 content_origin,
877 scroll_left,
878 visible_text_bounds,
879 cx,
880 selection_ranges,
881 visible_bounds,
882 );
883 }
884
885 scene.paint_layer(Some(bounds), |scene| {
886 for cursor in cursors {
887 cursor.paint(scene, content_origin, cx);
888 }
889 });
890
891 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
892 scene.push_stacking_context(None, None);
893 let cursor_row_layout =
894 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
895 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
896 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
897 let mut list_origin = content_origin + vec2f(x, y);
898 let list_width = context_menu.size().x();
899 let list_height = context_menu.size().y();
900
901 // Snap the right edge of the list to the right edge of the window if
902 // its horizontal bounds overflow.
903 if list_origin.x() + list_width > cx.window_size().x() {
904 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
905 }
906
907 if list_origin.y() + list_height > bounds.max_y() {
908 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
909 }
910
911 context_menu.paint(
912 scene,
913 list_origin,
914 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
915 editor,
916 cx,
917 );
918
919 scene.pop_stacking_context();
920 }
921
922 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
923 scene.push_stacking_context(None, None);
924
925 // This is safe because we check on layout whether the required row is available
926 let hovered_row_layout =
927 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
928
929 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
930 // height. This is the size we will use to decide whether to render popovers above or below
931 // the hovered line.
932 let first_size = hover_popovers[0].size();
933 let height_to_reserve = first_size.y()
934 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
935
936 // Compute Hovered Point
937 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
938 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
939 let hovered_point = content_origin + vec2f(x, y);
940
941 if hovered_point.y() - height_to_reserve > 0.0 {
942 // There is enough space above. Render popovers above the hovered point
943 let mut current_y = hovered_point.y();
944 for hover_popover in hover_popovers {
945 let size = hover_popover.size();
946 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
947
948 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
949 if x_out_of_bounds < 0.0 {
950 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
951 }
952
953 hover_popover.paint(
954 scene,
955 popover_origin,
956 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
957 editor,
958 cx,
959 );
960
961 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
962 }
963 } else {
964 // There is not enough space above. Render popovers below the hovered point
965 let mut current_y = hovered_point.y() + layout.position_map.line_height;
966 for hover_popover in hover_popovers {
967 let size = hover_popover.size();
968 let mut popover_origin = vec2f(hovered_point.x(), current_y);
969
970 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
971 if x_out_of_bounds < 0.0 {
972 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
973 }
974
975 hover_popover.paint(
976 scene,
977 popover_origin,
978 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
979 editor,
980 cx,
981 );
982
983 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
984 }
985 }
986
987 scene.pop_stacking_context();
988 }
989
990 scene.pop_layer();
991 }
992
993 fn paint_scrollbar(
994 &mut self,
995 scene: &mut SceneBuilder,
996 bounds: RectF,
997 layout: &mut LayoutState,
998 cx: &mut ViewContext<Editor>,
999 ) {
1000 enum ScrollbarMouseHandlers {}
1001 if layout.mode != EditorMode::Full {
1002 return;
1003 }
1004
1005 let style = &self.style.theme.scrollbar;
1006
1007 let top = bounds.min_y();
1008 let bottom = bounds.max_y();
1009 let right = bounds.max_x();
1010 let left = right - style.width;
1011 let row_range = &layout.scrollbar_row_range;
1012 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1013
1014 let mut height = bounds.height();
1015 let mut first_row_y_offset = 0.0;
1016
1017 // Impose a minimum height on the scrollbar thumb
1018 let min_thumb_height =
1019 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1020 let thumb_height = (row_range.end - row_range.start) * height / max_row;
1021 if thumb_height < min_thumb_height {
1022 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1023 height -= min_thumb_height - thumb_height;
1024 }
1025
1026 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1027
1028 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1029 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1030 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1031 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1032
1033 if layout.show_scrollbars {
1034 scene.push_quad(Quad {
1035 bounds: track_bounds,
1036 border: style.track.border,
1037 background: style.track.background_color,
1038 ..Default::default()
1039 });
1040 scene.push_quad(Quad {
1041 bounds: thumb_bounds,
1042 border: style.thumb.border,
1043 background: style.thumb.background_color,
1044 corner_radius: style.thumb.corner_radius,
1045 });
1046 }
1047
1048 scene.push_cursor_region(CursorRegion {
1049 bounds: track_bounds,
1050 style: CursorStyle::Arrow,
1051 });
1052 scene.push_mouse_region(
1053 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1054 .on_move(move |_, editor: &mut Editor, cx| {
1055 editor.scroll_manager.show_scrollbar(cx);
1056 })
1057 .on_down(MouseButton::Left, {
1058 let row_range = row_range.clone();
1059 move |event, editor: &mut Editor, cx| {
1060 let y = event.position.y();
1061 if y < thumb_top || thumb_bottom < y {
1062 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1063 let top_row = center_row
1064 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1065 let mut position = editor.scroll_position(cx);
1066 position.set_y(top_row as f32);
1067 editor.set_scroll_position(position, cx);
1068 } else {
1069 editor.scroll_manager.show_scrollbar(cx);
1070 }
1071 }
1072 })
1073 .on_drag(MouseButton::Left, {
1074 move |event, editor: &mut Editor, cx| {
1075 let y = event.prev_mouse_position.y();
1076 let new_y = event.position.y();
1077 if thumb_top < y && y < thumb_bottom {
1078 let mut position = editor.scroll_position(cx);
1079 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1080 if position.y() < 0.0 {
1081 position.set_y(0.);
1082 }
1083 editor.set_scroll_position(position, cx);
1084 }
1085 }
1086 }),
1087 );
1088 }
1089
1090 #[allow(clippy::too_many_arguments)]
1091 fn paint_highlighted_range(
1092 &self,
1093 scene: &mut SceneBuilder,
1094 range: Range<DisplayPoint>,
1095 color: Color,
1096 corner_radius: f32,
1097 line_end_overshoot: f32,
1098 layout: &LayoutState,
1099 content_origin: Vector2F,
1100 scroll_top: f32,
1101 scroll_left: f32,
1102 bounds: RectF,
1103 ) {
1104 let start_row = layout.visible_display_row_range.start;
1105 let end_row = layout.visible_display_row_range.end;
1106 if range.start != range.end {
1107 let row_range = if range.end.column() == 0 {
1108 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1109 } else {
1110 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1111 };
1112
1113 let highlighted_range = HighlightedRange {
1114 color,
1115 line_height: layout.position_map.line_height,
1116 corner_radius,
1117 start_y: content_origin.y()
1118 + row_range.start as f32 * layout.position_map.line_height
1119 - scroll_top,
1120 lines: row_range
1121 .into_iter()
1122 .map(|row| {
1123 let line_layout =
1124 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1125 HighlightedRangeLine {
1126 start_x: if row == range.start.row() {
1127 content_origin.x()
1128 + line_layout.x_for_index(range.start.column() as usize)
1129 - scroll_left
1130 } else {
1131 content_origin.x() - scroll_left
1132 },
1133 end_x: if row == range.end.row() {
1134 content_origin.x()
1135 + line_layout.x_for_index(range.end.column() as usize)
1136 - scroll_left
1137 } else {
1138 content_origin.x() + line_layout.width() + line_end_overshoot
1139 - scroll_left
1140 },
1141 }
1142 })
1143 .collect(),
1144 };
1145
1146 highlighted_range.paint(bounds, scene);
1147 }
1148 }
1149
1150 fn paint_blocks(
1151 &mut self,
1152 scene: &mut SceneBuilder,
1153 bounds: RectF,
1154 visible_bounds: RectF,
1155 layout: &mut LayoutState,
1156 editor: &mut Editor,
1157 cx: &mut ViewContext<Editor>,
1158 ) {
1159 let scroll_position = layout.position_map.snapshot.scroll_position();
1160 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1161 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1162
1163 for block in &mut layout.blocks {
1164 let mut origin = bounds.origin()
1165 + vec2f(
1166 0.,
1167 block.row as f32 * layout.position_map.line_height - scroll_top,
1168 );
1169 if !matches!(block.style, BlockStyle::Sticky) {
1170 origin += vec2f(-scroll_left, 0.);
1171 }
1172 block
1173 .element
1174 .paint(scene, origin, visible_bounds, editor, cx);
1175 }
1176 }
1177
1178 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1179 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1180 let style = &self.style;
1181
1182 cx.text_layout_cache()
1183 .layout_str(
1184 "1".repeat(digit_count).as_str(),
1185 style.text.font_size,
1186 &[(
1187 digit_count,
1188 RunStyle {
1189 font_id: style.text.font_id,
1190 color: Color::black(),
1191 underline: Default::default(),
1192 },
1193 )],
1194 )
1195 .width()
1196 }
1197
1198 //Folds contained in a hunk are ignored apart from shrinking visual size
1199 //If a fold contains any hunks then that fold line is marked as modified
1200 fn layout_git_gutters(
1201 &self,
1202 display_rows: Range<u32>,
1203 snapshot: &EditorSnapshot,
1204 ) -> Vec<DisplayDiffHunk> {
1205 let buffer_snapshot = &snapshot.buffer_snapshot;
1206
1207 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1208 .to_point(snapshot)
1209 .row;
1210 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1211 .to_point(snapshot)
1212 .row;
1213
1214 buffer_snapshot
1215 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1216 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1217 .dedup()
1218 .collect()
1219 }
1220
1221 fn layout_line_numbers(
1222 &self,
1223 rows: Range<u32>,
1224 active_rows: &BTreeMap<u32, bool>,
1225 is_singleton: bool,
1226 snapshot: &EditorSnapshot,
1227 cx: &ViewContext<Editor>,
1228 ) -> (
1229 Vec<Option<text_layout::Line>>,
1230 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1231 ) {
1232 let style = &self.style;
1233 let include_line_numbers = snapshot.mode == EditorMode::Full;
1234 let mut line_number_layouts = Vec::with_capacity(rows.len());
1235 let mut fold_statuses = Vec::with_capacity(rows.len());
1236 let mut line_number = String::new();
1237 for (ix, row) in snapshot
1238 .buffer_rows(rows.start)
1239 .take((rows.end - rows.start) as usize)
1240 .enumerate()
1241 {
1242 let display_row = rows.start + ix as u32;
1243 let (active, color) = if active_rows.contains_key(&display_row) {
1244 (true, style.line_number_active)
1245 } else {
1246 (false, style.line_number)
1247 };
1248 if let Some(buffer_row) = row {
1249 if include_line_numbers {
1250 line_number.clear();
1251 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1252 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1253 &line_number,
1254 style.text.font_size,
1255 &[(
1256 line_number.len(),
1257 RunStyle {
1258 font_id: style.text.font_id,
1259 color,
1260 underline: Default::default(),
1261 },
1262 )],
1263 )));
1264 fold_statuses.push(
1265 is_singleton
1266 .then(|| {
1267 snapshot
1268 .fold_for_line(buffer_row)
1269 .map(|fold_status| (fold_status, buffer_row, active))
1270 })
1271 .flatten(),
1272 )
1273 }
1274 } else {
1275 fold_statuses.push(None);
1276 line_number_layouts.push(None);
1277 }
1278 }
1279
1280 (line_number_layouts, fold_statuses)
1281 }
1282
1283 fn layout_lines(
1284 &mut self,
1285 rows: Range<u32>,
1286 snapshot: &EditorSnapshot,
1287 cx: &ViewContext<Editor>,
1288 ) -> Vec<LineWithInvisibles> {
1289 if rows.start >= rows.end {
1290 return Vec::new();
1291 }
1292
1293 // When the editor is empty and unfocused, then show the placeholder.
1294 if snapshot.is_empty() {
1295 let placeholder_style = self
1296 .style
1297 .placeholder_text
1298 .as_ref()
1299 .unwrap_or(&self.style.text);
1300 let placeholder_text = snapshot.placeholder_text();
1301 let placeholder_lines = placeholder_text
1302 .as_ref()
1303 .map_or("", AsRef::as_ref)
1304 .split('\n')
1305 .skip(rows.start as usize)
1306 .chain(iter::repeat(""))
1307 .take(rows.len());
1308 placeholder_lines
1309 .map(|line| {
1310 cx.text_layout_cache().layout_str(
1311 line,
1312 placeholder_style.font_size,
1313 &[(
1314 line.len(),
1315 RunStyle {
1316 font_id: placeholder_style.font_id,
1317 color: placeholder_style.color,
1318 underline: Default::default(),
1319 },
1320 )],
1321 )
1322 })
1323 .map(|line| LineWithInvisibles {
1324 line,
1325 invisibles: Vec::new(),
1326 })
1327 .collect()
1328 } else {
1329 let style = &self.style;
1330 let chunks = snapshot
1331 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1332 .map(|chunk| {
1333 let mut highlight_style = chunk
1334 .syntax_highlight_id
1335 .and_then(|id| id.style(&style.syntax));
1336
1337 if let Some(chunk_highlight) = chunk.highlight_style {
1338 if let Some(highlight_style) = highlight_style.as_mut() {
1339 highlight_style.highlight(chunk_highlight);
1340 } else {
1341 highlight_style = Some(chunk_highlight);
1342 }
1343 }
1344
1345 let mut diagnostic_highlight = HighlightStyle::default();
1346
1347 if chunk.is_unnecessary {
1348 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1349 }
1350
1351 if let Some(severity) = chunk.diagnostic_severity {
1352 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1353 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1354 let diagnostic_style = super::diagnostic_style(severity, true, style);
1355 diagnostic_highlight.underline = Some(Underline {
1356 color: Some(diagnostic_style.message.text.color),
1357 thickness: 1.0.into(),
1358 squiggly: true,
1359 });
1360 }
1361 }
1362
1363 if let Some(highlight_style) = highlight_style.as_mut() {
1364 highlight_style.highlight(diagnostic_highlight);
1365 } else {
1366 highlight_style = Some(diagnostic_highlight);
1367 }
1368
1369 HighlightedChunk {
1370 chunk: chunk.text,
1371 style: highlight_style,
1372 is_tab: chunk.is_tab,
1373 }
1374 });
1375
1376 layout_highlighted_chunks(
1377 chunks,
1378 &style.text,
1379 cx.text_layout_cache(),
1380 cx.font_cache(),
1381 MAX_LINE_LEN,
1382 rows.len() as usize,
1383 )
1384 }
1385 }
1386
1387 #[allow(clippy::too_many_arguments)]
1388 fn layout_blocks(
1389 &mut self,
1390 rows: Range<u32>,
1391 snapshot: &EditorSnapshot,
1392 editor_width: f32,
1393 scroll_width: f32,
1394 gutter_padding: f32,
1395 gutter_width: f32,
1396 em_width: f32,
1397 text_x: f32,
1398 line_height: f32,
1399 style: &EditorStyle,
1400 line_layouts: &[LineWithInvisibles],
1401 include_root: bool,
1402 editor: &mut Editor,
1403 cx: &mut LayoutContext<Editor>,
1404 ) -> (f32, Vec<BlockLayout>) {
1405 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1406 let scroll_x = snapshot.scroll_anchor.offset.x();
1407 let (fixed_blocks, non_fixed_blocks) = snapshot
1408 .blocks_in_range(rows.clone())
1409 .partition::<Vec<_>, _>(|(_, block)| match block {
1410 TransformBlock::ExcerptHeader { .. } => false,
1411 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1412 });
1413 let mut render_block = |block: &TransformBlock, width: f32| {
1414 let mut element = match block {
1415 TransformBlock::Custom(block) => {
1416 let align_to = block
1417 .position()
1418 .to_point(&snapshot.buffer_snapshot)
1419 .to_display_point(snapshot);
1420 let anchor_x = text_x
1421 + if rows.contains(&align_to.row()) {
1422 line_layouts[(align_to.row() - rows.start) as usize]
1423 .line
1424 .x_for_index(align_to.column() as usize)
1425 } else {
1426 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1427 .x_for_index(align_to.column() as usize)
1428 };
1429
1430 block.render(&mut BlockContext {
1431 view_context: cx,
1432 anchor_x,
1433 gutter_padding,
1434 line_height,
1435 scroll_x,
1436 gutter_width,
1437 em_width,
1438 })
1439 }
1440 TransformBlock::ExcerptHeader {
1441 id,
1442 buffer,
1443 range,
1444 starts_new_buffer,
1445 ..
1446 } => {
1447 let id = *id;
1448 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1449 let jump_path = ProjectPath {
1450 worktree_id: file.worktree_id(cx),
1451 path: file.path.clone(),
1452 };
1453 let jump_anchor = range
1454 .primary
1455 .as_ref()
1456 .map_or(range.context.start, |primary| primary.start);
1457 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
1458
1459 enum JumpIcon {}
1460 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
1461 let style = style.jump_icon.style_for(state, false);
1462 Svg::new("icons/arrow_up_right_8.svg")
1463 .with_color(style.color)
1464 .constrained()
1465 .with_width(style.icon_width)
1466 .aligned()
1467 .contained()
1468 .with_style(style.container)
1469 .constrained()
1470 .with_width(style.button_width)
1471 .with_height(style.button_width)
1472 })
1473 .with_cursor_style(CursorStyle::PointingHand)
1474 .on_click(MouseButton::Left, move |_, editor, cx| {
1475 if let Some(workspace) = editor
1476 .workspace
1477 .as_ref()
1478 .and_then(|(workspace, _)| workspace.upgrade(cx))
1479 {
1480 workspace.update(cx, |workspace, cx| {
1481 Editor::jump(
1482 workspace,
1483 jump_path.clone(),
1484 jump_position,
1485 jump_anchor,
1486 cx,
1487 );
1488 });
1489 }
1490 })
1491 .with_tooltip::<JumpIcon>(
1492 id.into(),
1493 "Jump to Buffer".to_string(),
1494 Some(Box::new(crate::OpenExcerpts)),
1495 tooltip_style.clone(),
1496 cx,
1497 )
1498 .aligned()
1499 .flex_float()
1500 });
1501
1502 if *starts_new_buffer {
1503 let style = &self.style.diagnostic_path_header;
1504 let font_size =
1505 (style.text_scale_factor * self.style.text.font_size).round();
1506
1507 let path = buffer.resolve_file_path(cx, include_root);
1508 let mut filename = None;
1509 let mut parent_path = None;
1510 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1511 if let Some(path) = path {
1512 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1513 parent_path =
1514 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1515 }
1516
1517 Flex::row()
1518 .with_child(
1519 Label::new(
1520 filename.unwrap_or_else(|| "untitled".to_string()),
1521 style.filename.text.clone().with_font_size(font_size),
1522 )
1523 .contained()
1524 .with_style(style.filename.container)
1525 .aligned(),
1526 )
1527 .with_children(parent_path.map(|path| {
1528 Label::new(path, style.path.text.clone().with_font_size(font_size))
1529 .contained()
1530 .with_style(style.path.container)
1531 .aligned()
1532 }))
1533 .with_children(jump_icon)
1534 .contained()
1535 .with_style(style.container)
1536 .with_padding_left(gutter_padding)
1537 .with_padding_right(gutter_padding)
1538 .expanded()
1539 .into_any_named("path header block")
1540 } else {
1541 let text_style = self.style.text.clone();
1542 Flex::row()
1543 .with_child(Label::new("⋯", text_style))
1544 .with_children(jump_icon)
1545 .contained()
1546 .with_padding_left(gutter_padding)
1547 .with_padding_right(gutter_padding)
1548 .expanded()
1549 .into_any_named("collapsed context")
1550 }
1551 }
1552 };
1553
1554 element.layout(
1555 SizeConstraint {
1556 min: Vector2F::zero(),
1557 max: vec2f(width, block.height() as f32 * line_height),
1558 },
1559 editor,
1560 cx,
1561 );
1562 element
1563 };
1564
1565 let mut fixed_block_max_width = 0f32;
1566 let mut blocks = Vec::new();
1567 for (row, block) in fixed_blocks {
1568 let element = render_block(block, f32::INFINITY);
1569 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1570 blocks.push(BlockLayout {
1571 row,
1572 element,
1573 style: BlockStyle::Fixed,
1574 });
1575 }
1576 for (row, block) in non_fixed_blocks {
1577 let style = match block {
1578 TransformBlock::Custom(block) => block.style(),
1579 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1580 };
1581 let width = match style {
1582 BlockStyle::Sticky => editor_width,
1583 BlockStyle::Flex => editor_width
1584 .max(fixed_block_max_width)
1585 .max(gutter_width + scroll_width),
1586 BlockStyle::Fixed => unreachable!(),
1587 };
1588 let element = render_block(block, width);
1589 blocks.push(BlockLayout {
1590 row,
1591 element,
1592 style,
1593 });
1594 }
1595 (
1596 scroll_width.max(fixed_block_max_width - gutter_width),
1597 blocks,
1598 )
1599 }
1600}
1601
1602fn draw_line_glyphs(
1603 layout: &mut LayoutState,
1604 start_row: u32,
1605 scroll_top: f32,
1606 scene: &mut SceneBuilder,
1607 content_origin: Vector2F,
1608 scroll_left: f32,
1609 visible_text_bounds: RectF,
1610 cx: &mut ViewContext<Editor>,
1611 selection_ranges: SmallVec<[Range<DisplayPoint>; 32]>,
1612 visible_bounds: RectF,
1613) {
1614 let line_height = layout.position_map.line_height;
1615
1616 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
1617 let row = start_row + ix as u32;
1618 let line_y = row as f32 * line_height - scroll_top;
1619
1620 line_with_invisibles.line.paint(
1621 scene,
1622 content_origin + vec2f(-scroll_left, line_y),
1623 visible_text_bounds,
1624 line_height,
1625 cx,
1626 );
1627
1628 draw_invisibles(
1629 cx,
1630 &selection_ranges,
1631 line_with_invisibles,
1632 layout,
1633 content_origin,
1634 scroll_left,
1635 line_y,
1636 row,
1637 scene,
1638 visible_bounds,
1639 line_height,
1640 );
1641 }
1642}
1643
1644fn draw_invisibles(
1645 cx: &mut ViewContext<Editor>,
1646 selection_ranges: &SmallVec<[Range<DisplayPoint>; 32]>,
1647 line_with_invisibles: &LineWithInvisibles,
1648 layout: &LayoutState,
1649 content_origin: Vector2F,
1650 scroll_left: f32,
1651 line_y: f32,
1652 row: u32,
1653 scene: &mut SceneBuilder,
1654 visible_bounds: RectF,
1655 line_height: f32,
1656) {
1657 let settings = cx.global::<Settings>();
1658 let regions_to_hit = match settings
1659 .editor_overrides
1660 .show_whitespaces
1661 .or(settings.editor_defaults.show_whitespaces)
1662 .unwrap_or_default()
1663 {
1664 ShowWhitespaces::None => return,
1665 ShowWhitespaces::Selection => Some(selection_ranges),
1666 ShowWhitespaces::All => None,
1667 };
1668
1669 for invisible in &line_with_invisibles.invisibles {
1670 let (&token_offset, invisible_symbol) = match invisible {
1671 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1672 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1673 };
1674
1675 let x_offset = line_with_invisibles.line.x_for_index(token_offset);
1676 let invisible_offset =
1677 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1678 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1679
1680 if let Some(regions_to_hit) = regions_to_hit {
1681 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1682 if !regions_to_hit
1683 .iter()
1684 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1685 {
1686 continue;
1687 }
1688 }
1689 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1690 }
1691}
1692
1693struct HighlightedChunk<'a> {
1694 chunk: &'a str,
1695 style: Option<HighlightStyle>,
1696 is_tab: bool,
1697}
1698
1699#[derive(Debug)]
1700pub struct LineWithInvisibles {
1701 pub line: Line,
1702 invisibles: Vec<Invisible>,
1703}
1704
1705#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1706enum Invisible {
1707 Tab { line_start_offset: usize },
1708 Whitespace { line_offset: usize },
1709}
1710
1711impl Invisible {
1712 #[cfg(test)]
1713 fn offset(&self) -> usize {
1714 *match self {
1715 Self::Tab { line_start_offset } => line_start_offset,
1716 Self::Whitespace { line_offset } => line_offset,
1717 }
1718 }
1719}
1720
1721fn layout_highlighted_chunks<'a>(
1722 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1723 text_style: &TextStyle,
1724 text_layout_cache: &TextLayoutCache,
1725 font_cache: &Arc<FontCache>,
1726 max_line_len: usize,
1727 max_line_count: usize,
1728) -> Vec<LineWithInvisibles> {
1729 let mut layouts = Vec::with_capacity(max_line_count);
1730 let mut line = String::new();
1731 let mut invisibles = Vec::new();
1732 let mut styles = Vec::new();
1733 let mut non_whitespace_added = false;
1734 let mut row = 0;
1735 let mut line_exceeded_max_len = false;
1736 for highlighted_chunk in chunks.chain([HighlightedChunk {
1737 chunk: "\n",
1738 style: None,
1739 is_tab: false,
1740 }]) {
1741 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1742 if ix > 0 {
1743 layouts.push(LineWithInvisibles {
1744 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1745 invisibles: invisibles.drain(..).collect(),
1746 });
1747
1748 line.clear();
1749 styles.clear();
1750 row += 1;
1751 line_exceeded_max_len = false;
1752 non_whitespace_added = false;
1753 if row == max_line_count {
1754 return layouts;
1755 }
1756 }
1757
1758 if !line_chunk.is_empty() && !line_exceeded_max_len {
1759 let text_style = if let Some(style) = highlighted_chunk.style {
1760 text_style
1761 .clone()
1762 .highlight(style, font_cache)
1763 .map(Cow::Owned)
1764 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1765 } else {
1766 Cow::Borrowed(text_style)
1767 };
1768
1769 if line.len() + line_chunk.len() > max_line_len {
1770 let mut chunk_len = max_line_len - line.len();
1771 while !line_chunk.is_char_boundary(chunk_len) {
1772 chunk_len -= 1;
1773 }
1774 line_chunk = &line_chunk[..chunk_len];
1775 line_exceeded_max_len = true;
1776 }
1777
1778 styles.push((
1779 line_chunk.len(),
1780 RunStyle {
1781 font_id: text_style.font_id,
1782 color: text_style.color,
1783 underline: text_style.underline,
1784 },
1785 ));
1786
1787 // Line wrap pads its contents with fake whitespaces,
1788 // avoid printing them
1789 let inside_wrapped_string = ix > 0;
1790 if highlighted_chunk.is_tab {
1791 if non_whitespace_added || !inside_wrapped_string {
1792 invisibles.push(Invisible::Tab {
1793 line_start_offset: line.len(),
1794 });
1795 }
1796 } else {
1797 invisibles.extend(
1798 line_chunk
1799 .chars()
1800 .enumerate()
1801 .filter(|(_, line_char)| {
1802 let is_whitespace = line_char.is_whitespace();
1803 non_whitespace_added |= !is_whitespace;
1804 is_whitespace && (non_whitespace_added || !inside_wrapped_string)
1805 })
1806 .map(|(whitespace_index, _)| Invisible::Whitespace {
1807 line_offset: line.len() + whitespace_index,
1808 }),
1809 )
1810 }
1811 line.push_str(line_chunk);
1812 }
1813 }
1814 }
1815
1816 layouts
1817}
1818
1819impl Element<Editor> for EditorElement {
1820 type LayoutState = LayoutState;
1821 type PaintState = ();
1822
1823 fn layout(
1824 &mut self,
1825 constraint: SizeConstraint,
1826 editor: &mut Editor,
1827 cx: &mut LayoutContext<Editor>,
1828 ) -> (Vector2F, Self::LayoutState) {
1829 let mut size = constraint.max;
1830 if size.x().is_infinite() {
1831 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1832 }
1833
1834 let snapshot = editor.snapshot(cx);
1835 let style = self.style.clone();
1836 let line_height = style.text.line_height(cx.font_cache());
1837
1838 let gutter_padding;
1839 let gutter_width;
1840 let gutter_margin;
1841 if snapshot.mode == EditorMode::Full {
1842 let em_width = style.text.em_width(cx.font_cache());
1843 gutter_padding = (em_width * style.gutter_padding_factor).round();
1844 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1845 gutter_margin = -style.text.descent(cx.font_cache());
1846 } else {
1847 gutter_padding = 0.0;
1848 gutter_width = 0.0;
1849 gutter_margin = 0.0;
1850 };
1851
1852 let text_width = size.x() - gutter_width;
1853 let em_width = style.text.em_width(cx.font_cache());
1854 let em_advance = style.text.em_advance(cx.font_cache());
1855 let overscroll = vec2f(em_width, 0.);
1856 let snapshot = {
1857 editor.set_visible_line_count(size.y() / line_height);
1858
1859 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1860 let wrap_width = match editor.soft_wrap_mode(cx) {
1861 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1862 SoftWrap::EditorWidth => editor_width,
1863 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1864 };
1865
1866 if editor.set_wrap_width(Some(wrap_width), cx) {
1867 editor.snapshot(cx)
1868 } else {
1869 snapshot
1870 }
1871 };
1872
1873 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1874 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1875 size.set_y(
1876 scroll_height
1877 .min(constraint.max_along(Axis::Vertical))
1878 .max(constraint.min_along(Axis::Vertical))
1879 .min(line_height * max_lines as f32),
1880 )
1881 } else if let EditorMode::SingleLine = snapshot.mode {
1882 size.set_y(
1883 line_height
1884 .min(constraint.max_along(Axis::Vertical))
1885 .max(constraint.min_along(Axis::Vertical)),
1886 )
1887 } else if size.y().is_infinite() {
1888 size.set_y(scroll_height);
1889 }
1890 let gutter_size = vec2f(gutter_width, size.y());
1891 let text_size = vec2f(text_width, size.y());
1892
1893 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1894 let mut snapshot = editor.snapshot(cx);
1895
1896 let scroll_position = snapshot.scroll_position();
1897 // The scroll position is a fractional point, the whole number of which represents
1898 // the top of the window in terms of display rows.
1899 let start_row = scroll_position.y() as u32;
1900 let height_in_lines = size.y() / line_height;
1901 let max_row = snapshot.max_point().row();
1902
1903 // Add 1 to ensure selections bleed off screen
1904 let end_row = 1 + cmp::min(
1905 (scroll_position.y() + height_in_lines).ceil() as u32,
1906 max_row,
1907 );
1908
1909 let start_anchor = if start_row == 0 {
1910 Anchor::min()
1911 } else {
1912 snapshot
1913 .buffer_snapshot
1914 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1915 };
1916 let end_anchor = if end_row > max_row {
1917 Anchor::max()
1918 } else {
1919 snapshot
1920 .buffer_snapshot
1921 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1922 };
1923
1924 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1925 let mut active_rows = BTreeMap::new();
1926 let mut fold_ranges = Vec::new();
1927 let is_singleton = editor.is_singleton(cx);
1928
1929 let highlighted_rows = editor.highlighted_rows();
1930 let theme = cx.global::<Settings>().theme.as_ref();
1931 let highlighted_ranges = editor.background_highlights_in_range(
1932 start_anchor..end_anchor,
1933 &snapshot.display_snapshot,
1934 theme,
1935 );
1936
1937 fold_ranges.extend(
1938 snapshot
1939 .folds_in_range(start_anchor..end_anchor)
1940 .map(|anchor| {
1941 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1942 (
1943 start.row,
1944 start.to_display_point(&snapshot.display_snapshot)
1945 ..anchor.end.to_display_point(&snapshot),
1946 )
1947 }),
1948 );
1949
1950 let mut remote_selections = HashMap::default();
1951 for (replica_id, line_mode, cursor_shape, selection) in snapshot
1952 .buffer_snapshot
1953 .remote_selections_in_range(&(start_anchor..end_anchor))
1954 {
1955 // The local selections match the leader's selections.
1956 if Some(replica_id) == editor.leader_replica_id {
1957 continue;
1958 }
1959 remote_selections
1960 .entry(replica_id)
1961 .or_insert(Vec::new())
1962 .push(SelectionLayout::new(
1963 selection,
1964 line_mode,
1965 cursor_shape,
1966 &snapshot.display_snapshot,
1967 ));
1968 }
1969 selections.extend(remote_selections);
1970
1971 if editor.show_local_selections {
1972 let mut local_selections = editor
1973 .selections
1974 .disjoint_in_range(start_anchor..end_anchor, cx);
1975 local_selections.extend(editor.selections.pending(cx));
1976 for selection in &local_selections {
1977 let is_empty = selection.start == selection.end;
1978 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1979 let selection_end = snapshot.next_line_boundary(selection.end).1;
1980 for row in cmp::max(selection_start.row(), start_row)
1981 ..=cmp::min(selection_end.row(), end_row)
1982 {
1983 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1984 *contains_non_empty_selection |= !is_empty;
1985 }
1986 }
1987
1988 // Render the local selections in the leader's color when following.
1989 let local_replica_id = editor
1990 .leader_replica_id
1991 .unwrap_or_else(|| editor.replica_id(cx));
1992
1993 selections.push((
1994 local_replica_id,
1995 local_selections
1996 .into_iter()
1997 .map(|selection| {
1998 SelectionLayout::new(
1999 selection,
2000 editor.selections.line_mode,
2001 editor.cursor_shape,
2002 &snapshot.display_snapshot,
2003 )
2004 })
2005 .collect(),
2006 ));
2007 }
2008
2009 let show_scrollbars = editor.scroll_manager.scrollbars_visible();
2010 let include_root = editor
2011 .project
2012 .as_ref()
2013 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2014 .unwrap_or_default();
2015
2016 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2017 .into_iter()
2018 .map(|(id, fold)| {
2019 let color = self
2020 .style
2021 .folds
2022 .ellipses
2023 .background
2024 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
2025 .color;
2026
2027 (id, fold, color)
2028 })
2029 .collect();
2030
2031 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2032 start_row..end_row,
2033 &active_rows,
2034 is_singleton,
2035 &snapshot,
2036 cx,
2037 );
2038
2039 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2040
2041 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2042
2043 let mut max_visible_line_width = 0.0;
2044 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
2045 for line_with_invisibles in &line_layouts {
2046 if line_with_invisibles.line.width() > max_visible_line_width {
2047 max_visible_line_width = line_with_invisibles.line.width();
2048 }
2049 }
2050
2051 let style = self.style.clone();
2052 let longest_line_width = layout_line(
2053 snapshot.longest_row(),
2054 &snapshot,
2055 &style,
2056 cx.text_layout_cache(),
2057 )
2058 .width();
2059 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2060 let em_width = style.text.em_width(cx.font_cache());
2061 let (scroll_width, blocks) = self.layout_blocks(
2062 start_row..end_row,
2063 &snapshot,
2064 size.x(),
2065 scroll_width,
2066 gutter_padding,
2067 gutter_width,
2068 em_width,
2069 gutter_width + gutter_margin,
2070 line_height,
2071 &style,
2072 &line_layouts,
2073 include_root,
2074 editor,
2075 cx,
2076 );
2077
2078 let scroll_max = vec2f(
2079 ((scroll_width - text_size.x()) / em_width).max(0.0),
2080 max_row as f32,
2081 );
2082
2083 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2084
2085 let autoscrolled = if autoscroll_horizontally {
2086 editor.autoscroll_horizontally(
2087 start_row,
2088 text_size.x(),
2089 scroll_width,
2090 em_width,
2091 &line_layouts,
2092 cx,
2093 )
2094 } else {
2095 false
2096 };
2097
2098 if clamped || autoscrolled {
2099 snapshot = editor.snapshot(cx);
2100 }
2101
2102 let newest_selection_head = editor
2103 .selections
2104 .newest::<usize>(cx)
2105 .head()
2106 .to_display_point(&snapshot);
2107 let style = editor.style(cx);
2108
2109 let mut context_menu = None;
2110 let mut code_actions_indicator = None;
2111 if (start_row..end_row).contains(&newest_selection_head.row()) {
2112 if editor.context_menu_visible() {
2113 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2114 }
2115
2116 let active = matches!(
2117 editor.context_menu,
2118 Some(crate::ContextMenu::CodeActions(_))
2119 );
2120
2121 code_actions_indicator = editor
2122 .render_code_actions_indicator(&style, active, cx)
2123 .map(|indicator| (newest_selection_head.row(), indicator));
2124 }
2125
2126 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2127 let mut hover = editor
2128 .hover_state
2129 .render(&snapshot, &style, visible_rows, cx);
2130 let mode = editor.mode;
2131
2132 let mut fold_indicators = editor.render_fold_indicators(
2133 fold_statuses,
2134 &style,
2135 editor.gutter_hovered,
2136 line_height,
2137 gutter_margin,
2138 cx,
2139 );
2140
2141 if let Some((_, context_menu)) = context_menu.as_mut() {
2142 context_menu.layout(
2143 SizeConstraint {
2144 min: Vector2F::zero(),
2145 max: vec2f(
2146 cx.window_size().x() * 0.7,
2147 (12. * line_height).min((size.y() - line_height) / 2.),
2148 ),
2149 },
2150 editor,
2151 cx,
2152 );
2153 }
2154
2155 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2156 indicator.layout(
2157 SizeConstraint::strict_along(
2158 Axis::Vertical,
2159 line_height * style.code_actions.vertical_scale,
2160 ),
2161 editor,
2162 cx,
2163 );
2164 }
2165
2166 for fold_indicator in fold_indicators.iter_mut() {
2167 if let Some(indicator) = fold_indicator.as_mut() {
2168 indicator.layout(
2169 SizeConstraint::strict_along(
2170 Axis::Vertical,
2171 line_height * style.code_actions.vertical_scale,
2172 ),
2173 editor,
2174 cx,
2175 );
2176 }
2177 }
2178
2179 if let Some((_, hover_popovers)) = hover.as_mut() {
2180 for hover_popover in hover_popovers.iter_mut() {
2181 hover_popover.layout(
2182 SizeConstraint {
2183 min: Vector2F::zero(),
2184 max: vec2f(
2185 (120. * em_width) // Default size
2186 .min(size.x() / 2.) // Shrink to half of the editor width
2187 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2188 (16. * line_height) // Default size
2189 .min(size.y() / 2.) // Shrink to half of the editor height
2190 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2191 ),
2192 },
2193 editor,
2194 cx,
2195 );
2196 }
2197 }
2198
2199 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2200 let invisible_symbol_style = RunStyle {
2201 color: self.style.line_number,
2202 font_id: self.style.text.font_id,
2203 underline: Default::default(),
2204 };
2205
2206 (
2207 size,
2208 LayoutState {
2209 mode,
2210 position_map: Arc::new(PositionMap {
2211 size,
2212 scroll_max,
2213 line_layouts,
2214 line_height,
2215 em_width,
2216 em_advance,
2217 snapshot,
2218 }),
2219 visible_display_row_range: start_row..end_row,
2220 gutter_size,
2221 gutter_padding,
2222 text_size,
2223 scrollbar_row_range,
2224 show_scrollbars,
2225 max_row,
2226 gutter_margin,
2227 active_rows,
2228 highlighted_rows,
2229 highlighted_ranges,
2230 fold_ranges,
2231 line_number_layouts,
2232 display_hunks,
2233 blocks,
2234 selections,
2235 context_menu,
2236 code_actions_indicator,
2237 fold_indicators,
2238 tab_invisible: cx.text_layout_cache().layout_str(
2239 "→",
2240 invisible_symbol_font_size,
2241 &[("→".len(), invisible_symbol_style)],
2242 ),
2243 space_invisible: cx.text_layout_cache().layout_str(
2244 "•",
2245 invisible_symbol_font_size,
2246 &[("•".len(), invisible_symbol_style)],
2247 ),
2248 hover_popovers: hover,
2249 },
2250 )
2251 }
2252
2253 fn paint(
2254 &mut self,
2255 scene: &mut SceneBuilder,
2256 bounds: RectF,
2257 visible_bounds: RectF,
2258 layout: &mut Self::LayoutState,
2259 editor: &mut Editor,
2260 cx: &mut ViewContext<Editor>,
2261 ) -> Self::PaintState {
2262 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2263 scene.push_layer(Some(visible_bounds));
2264
2265 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2266 let text_bounds = RectF::new(
2267 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2268 layout.text_size,
2269 );
2270
2271 Self::attach_mouse_handlers(
2272 scene,
2273 &layout.position_map,
2274 layout.hover_popovers.is_some(),
2275 visible_bounds,
2276 text_bounds,
2277 gutter_bounds,
2278 bounds,
2279 cx,
2280 );
2281
2282 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2283 if layout.gutter_size.x() > 0. {
2284 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2285 }
2286 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2287
2288 scene.push_layer(Some(bounds));
2289 if !layout.blocks.is_empty() {
2290 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2291 }
2292 self.paint_scrollbar(scene, bounds, layout, cx);
2293 scene.pop_layer();
2294
2295 scene.pop_layer();
2296 }
2297
2298 fn rect_for_text_range(
2299 &self,
2300 range_utf16: Range<usize>,
2301 bounds: RectF,
2302 _: RectF,
2303 layout: &Self::LayoutState,
2304 _: &Self::PaintState,
2305 _: &Editor,
2306 _: &ViewContext<Editor>,
2307 ) -> Option<RectF> {
2308 let text_bounds = RectF::new(
2309 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2310 layout.text_size,
2311 );
2312 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2313 let scroll_position = layout.position_map.snapshot.scroll_position();
2314 let start_row = scroll_position.y() as u32;
2315 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2316 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2317
2318 let range_start = OffsetUtf16(range_utf16.start)
2319 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2320 if range_start.row() < start_row {
2321 return None;
2322 }
2323
2324 let line = &layout
2325 .position_map
2326 .line_layouts
2327 .get((range_start.row() - start_row) as usize)?
2328 .line;
2329 let range_start_x = line.x_for_index(range_start.column() as usize);
2330 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2331 Some(RectF::new(
2332 content_origin
2333 + vec2f(
2334 range_start_x,
2335 range_start_y + layout.position_map.line_height,
2336 )
2337 - vec2f(scroll_left, scroll_top),
2338 vec2f(
2339 layout.position_map.em_width,
2340 layout.position_map.line_height,
2341 ),
2342 ))
2343 }
2344
2345 fn debug(
2346 &self,
2347 bounds: RectF,
2348 _: &Self::LayoutState,
2349 _: &Self::PaintState,
2350 _: &Editor,
2351 _: &ViewContext<Editor>,
2352 ) -> json::Value {
2353 json!({
2354 "type": "BufferElement",
2355 "bounds": bounds.to_json()
2356 })
2357 }
2358}
2359
2360type BufferRow = u32;
2361
2362pub struct LayoutState {
2363 position_map: Arc<PositionMap>,
2364 gutter_size: Vector2F,
2365 gutter_padding: f32,
2366 gutter_margin: f32,
2367 text_size: Vector2F,
2368 mode: EditorMode,
2369 visible_display_row_range: Range<u32>,
2370 active_rows: BTreeMap<u32, bool>,
2371 highlighted_rows: Option<Range<u32>>,
2372 line_number_layouts: Vec<Option<text_layout::Line>>,
2373 display_hunks: Vec<DisplayDiffHunk>,
2374 blocks: Vec<BlockLayout>,
2375 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2376 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2377 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2378 scrollbar_row_range: Range<f32>,
2379 show_scrollbars: bool,
2380 max_row: u32,
2381 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2382 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2383 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2384 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2385 tab_invisible: Line,
2386 space_invisible: Line,
2387}
2388
2389struct PositionMap {
2390 size: Vector2F,
2391 line_height: f32,
2392 scroll_max: Vector2F,
2393 em_width: f32,
2394 em_advance: f32,
2395 line_layouts: Vec<LineWithInvisibles>,
2396 snapshot: EditorSnapshot,
2397}
2398
2399impl PositionMap {
2400 /// Returns two display points:
2401 /// 1. The nearest *valid* position in the editor
2402 /// 2. An unclipped, potentially *invalid* position that maps directly to
2403 /// the given pixel position.
2404 fn point_for_position(
2405 &self,
2406 text_bounds: RectF,
2407 position: Vector2F,
2408 ) -> (DisplayPoint, DisplayPoint) {
2409 let scroll_position = self.snapshot.scroll_position();
2410 let position = position - text_bounds.origin();
2411 let y = position.y().max(0.0).min(self.size.y());
2412 let x = position.x() + (scroll_position.x() * self.em_width);
2413 let row = (y / self.line_height + scroll_position.y()) as u32;
2414 let (column, x_overshoot) = if let Some(line) = self
2415 .line_layouts
2416 .get(row as usize - scroll_position.y() as usize)
2417 .map(|line_with_spaces| &line_with_spaces.line)
2418 {
2419 if let Some(ix) = line.index_for_x(x) {
2420 (ix as u32, 0.0)
2421 } else {
2422 (line.len() as u32, 0f32.max(x - line.width()))
2423 }
2424 } else {
2425 (0, x)
2426 };
2427
2428 let mut target_point = DisplayPoint::new(row, column);
2429 let point = self.snapshot.clip_point(target_point, Bias::Left);
2430 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2431
2432 (point, target_point)
2433 }
2434}
2435
2436struct BlockLayout {
2437 row: u32,
2438 element: AnyElement<Editor>,
2439 style: BlockStyle,
2440}
2441
2442fn layout_line(
2443 row: u32,
2444 snapshot: &EditorSnapshot,
2445 style: &EditorStyle,
2446 layout_cache: &TextLayoutCache,
2447) -> text_layout::Line {
2448 let mut line = snapshot.line(row);
2449
2450 if line.len() > MAX_LINE_LEN {
2451 let mut len = MAX_LINE_LEN;
2452 while !line.is_char_boundary(len) {
2453 len -= 1;
2454 }
2455
2456 line.truncate(len);
2457 }
2458
2459 layout_cache.layout_str(
2460 &line,
2461 style.text.font_size,
2462 &[(
2463 snapshot.line_len(row) as usize,
2464 RunStyle {
2465 font_id: style.text.font_id,
2466 color: Color::black(),
2467 underline: Default::default(),
2468 },
2469 )],
2470 )
2471}
2472
2473#[derive(Debug)]
2474pub struct Cursor {
2475 origin: Vector2F,
2476 block_width: f32,
2477 line_height: f32,
2478 color: Color,
2479 shape: CursorShape,
2480 block_text: Option<Line>,
2481}
2482
2483impl Cursor {
2484 pub fn new(
2485 origin: Vector2F,
2486 block_width: f32,
2487 line_height: f32,
2488 color: Color,
2489 shape: CursorShape,
2490 block_text: Option<Line>,
2491 ) -> Cursor {
2492 Cursor {
2493 origin,
2494 block_width,
2495 line_height,
2496 color,
2497 shape,
2498 block_text,
2499 }
2500 }
2501
2502 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2503 RectF::new(
2504 self.origin + origin,
2505 vec2f(self.block_width, self.line_height),
2506 )
2507 }
2508
2509 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2510 let bounds = match self.shape {
2511 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2512 CursorShape::Block | CursorShape::Hollow => RectF::new(
2513 self.origin + origin,
2514 vec2f(self.block_width, self.line_height),
2515 ),
2516 CursorShape::Underscore => RectF::new(
2517 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2518 vec2f(self.block_width, 2.0),
2519 ),
2520 };
2521
2522 //Draw background or border quad
2523 if matches!(self.shape, CursorShape::Hollow) {
2524 scene.push_quad(Quad {
2525 bounds,
2526 background: None,
2527 border: Border::all(1., self.color),
2528 corner_radius: 0.,
2529 });
2530 } else {
2531 scene.push_quad(Quad {
2532 bounds,
2533 background: Some(self.color),
2534 border: Default::default(),
2535 corner_radius: 0.,
2536 });
2537 }
2538
2539 if let Some(block_text) = &self.block_text {
2540 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2541 }
2542 }
2543
2544 pub fn shape(&self) -> CursorShape {
2545 self.shape
2546 }
2547}
2548
2549#[derive(Debug)]
2550pub struct HighlightedRange {
2551 pub start_y: f32,
2552 pub line_height: f32,
2553 pub lines: Vec<HighlightedRangeLine>,
2554 pub color: Color,
2555 pub corner_radius: f32,
2556}
2557
2558#[derive(Debug)]
2559pub struct HighlightedRangeLine {
2560 pub start_x: f32,
2561 pub end_x: f32,
2562}
2563
2564impl HighlightedRange {
2565 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2566 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2567 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2568 self.paint_lines(
2569 self.start_y + self.line_height,
2570 &self.lines[1..],
2571 bounds,
2572 scene,
2573 );
2574 } else {
2575 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2576 }
2577 }
2578
2579 fn paint_lines(
2580 &self,
2581 start_y: f32,
2582 lines: &[HighlightedRangeLine],
2583 bounds: RectF,
2584 scene: &mut SceneBuilder,
2585 ) {
2586 if lines.is_empty() {
2587 return;
2588 }
2589
2590 let mut path = PathBuilder::new();
2591 let first_line = lines.first().unwrap();
2592 let last_line = lines.last().unwrap();
2593
2594 let first_top_left = vec2f(first_line.start_x, start_y);
2595 let first_top_right = vec2f(first_line.end_x, start_y);
2596
2597 let curve_height = vec2f(0., self.corner_radius);
2598 let curve_width = |start_x: f32, end_x: f32| {
2599 let max = (end_x - start_x) / 2.;
2600 let width = if max < self.corner_radius {
2601 max
2602 } else {
2603 self.corner_radius
2604 };
2605
2606 vec2f(width, 0.)
2607 };
2608
2609 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2610 path.reset(first_top_right - top_curve_width);
2611 path.curve_to(first_top_right + curve_height, first_top_right);
2612
2613 let mut iter = lines.iter().enumerate().peekable();
2614 while let Some((ix, line)) = iter.next() {
2615 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2616
2617 if let Some((_, next_line)) = iter.peek() {
2618 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2619
2620 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2621 Ordering::Equal => {
2622 path.line_to(bottom_right);
2623 }
2624 Ordering::Less => {
2625 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2626 path.line_to(bottom_right - curve_height);
2627 if self.corner_radius > 0. {
2628 path.curve_to(bottom_right - curve_width, bottom_right);
2629 }
2630 path.line_to(next_top_right + curve_width);
2631 if self.corner_radius > 0. {
2632 path.curve_to(next_top_right + curve_height, next_top_right);
2633 }
2634 }
2635 Ordering::Greater => {
2636 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2637 path.line_to(bottom_right - curve_height);
2638 if self.corner_radius > 0. {
2639 path.curve_to(bottom_right + curve_width, bottom_right);
2640 }
2641 path.line_to(next_top_right - curve_width);
2642 if self.corner_radius > 0. {
2643 path.curve_to(next_top_right + curve_height, next_top_right);
2644 }
2645 }
2646 }
2647 } else {
2648 let curve_width = curve_width(line.start_x, line.end_x);
2649 path.line_to(bottom_right - curve_height);
2650 if self.corner_radius > 0. {
2651 path.curve_to(bottom_right - curve_width, bottom_right);
2652 }
2653
2654 let bottom_left = vec2f(line.start_x, bottom_right.y());
2655 path.line_to(bottom_left + curve_width);
2656 if self.corner_radius > 0. {
2657 path.curve_to(bottom_left - curve_height, bottom_left);
2658 }
2659 }
2660 }
2661
2662 if first_line.start_x > last_line.start_x {
2663 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2664 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2665 path.line_to(second_top_left + curve_height);
2666 if self.corner_radius > 0. {
2667 path.curve_to(second_top_left + curve_width, second_top_left);
2668 }
2669 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2670 path.line_to(first_bottom_left - curve_width);
2671 if self.corner_radius > 0. {
2672 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2673 }
2674 }
2675
2676 path.line_to(first_top_left + curve_height);
2677 if self.corner_radius > 0. {
2678 path.curve_to(first_top_left + top_curve_width, first_top_left);
2679 }
2680 path.line_to(first_top_right - top_curve_width);
2681
2682 scene.push_path(path.build(self.color, Some(bounds)));
2683 }
2684}
2685
2686fn position_to_display_point(
2687 position: Vector2F,
2688 text_bounds: RectF,
2689 position_map: &PositionMap,
2690) -> Option<DisplayPoint> {
2691 if text_bounds.contains_point(position) {
2692 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2693 if point == target_point {
2694 Some(point)
2695 } else {
2696 None
2697 }
2698 } else {
2699 None
2700 }
2701}
2702
2703fn range_to_bounds(
2704 range: &Range<DisplayPoint>,
2705 content_origin: Vector2F,
2706 scroll_left: f32,
2707 scroll_top: f32,
2708 visible_row_range: &Range<u32>,
2709 line_end_overshoot: f32,
2710 position_map: &PositionMap,
2711) -> impl Iterator<Item = RectF> {
2712 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2713
2714 if range.start == range.end {
2715 return bounds.into_iter();
2716 }
2717
2718 let start_row = visible_row_range.start;
2719 let end_row = visible_row_range.end;
2720
2721 let row_range = if range.end.column() == 0 {
2722 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2723 } else {
2724 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2725 };
2726
2727 let first_y =
2728 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2729
2730 for (idx, row) in row_range.enumerate() {
2731 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2732
2733 let start_x = if row == range.start.row() {
2734 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2735 - scroll_left
2736 } else {
2737 content_origin.x() - scroll_left
2738 };
2739
2740 let end_x = if row == range.end.row() {
2741 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2742 } else {
2743 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2744 };
2745
2746 bounds.push(RectF::from_points(
2747 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2748 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2749 ))
2750 }
2751
2752 bounds.into_iter()
2753}
2754
2755pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2756 delta.powf(1.5) / 100.0
2757}
2758
2759fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2760 delta.powf(1.2) / 300.0
2761}
2762
2763#[cfg(test)]
2764mod tests {
2765 use super::*;
2766 use crate::{
2767 display_map::{BlockDisposition, BlockProperties},
2768 Editor, MultiBuffer,
2769 };
2770 use gpui::TestAppContext;
2771 use settings::Settings;
2772 use std::{num::NonZeroU32, sync::Arc};
2773 use util::test::sample_text;
2774
2775 #[gpui::test]
2776 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2777 cx.update(|cx| cx.set_global(Settings::test(cx)));
2778 let (_, editor) = cx.add_window(|cx| {
2779 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2780 Editor::new(EditorMode::Full, buffer, None, None, cx)
2781 });
2782 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2783
2784 let layouts = editor.update(cx, |editor, cx| {
2785 let snapshot = editor.snapshot(cx);
2786 element
2787 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2788 .0
2789 });
2790 assert_eq!(layouts.len(), 6);
2791 }
2792
2793 #[gpui::test]
2794 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2795 cx.update(|cx| cx.set_global(Settings::test(cx)));
2796 let (_, editor) = cx.add_window(|cx| {
2797 let buffer = MultiBuffer::build_simple("", cx);
2798 Editor::new(EditorMode::Full, buffer, None, None, cx)
2799 });
2800
2801 editor.update(cx, |editor, cx| {
2802 editor.set_placeholder_text("hello", cx);
2803 editor.insert_blocks(
2804 [BlockProperties {
2805 style: BlockStyle::Fixed,
2806 disposition: BlockDisposition::Above,
2807 height: 3,
2808 position: Anchor::min(),
2809 render: Arc::new(|_| Empty::new().into_any()),
2810 }],
2811 cx,
2812 );
2813
2814 // Blur the editor so that it displays placeholder text.
2815 cx.blur();
2816 });
2817
2818 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2819 let (size, mut state) = editor.update(cx, |editor, cx| {
2820 let mut new_parents = Default::default();
2821 let mut notify_views_if_parents_change = Default::default();
2822 let mut layout_cx = LayoutContext::new(
2823 cx,
2824 &mut new_parents,
2825 &mut notify_views_if_parents_change,
2826 false,
2827 );
2828 element.layout(
2829 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2830 editor,
2831 &mut layout_cx,
2832 )
2833 });
2834
2835 assert_eq!(state.position_map.line_layouts.len(), 4);
2836 assert_eq!(
2837 state
2838 .line_number_layouts
2839 .iter()
2840 .map(Option::is_some)
2841 .collect::<Vec<_>>(),
2842 &[false, false, false, true]
2843 );
2844
2845 // Don't panic.
2846 let mut scene = SceneBuilder::new(1.0);
2847 let bounds = RectF::new(Default::default(), size);
2848 editor.update(cx, |editor, cx| {
2849 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2850 });
2851 }
2852
2853 #[gpui::test]
2854 fn test_invisible_drawing(cx: &mut TestAppContext) {
2855 let tab_size = 4;
2856 let initial_str = "\t\t\t\t\t\t\t\t| | a b c d ";
2857 let (input_text, expected_invisibles) = {
2858 let mut input_text = String::new();
2859 let mut expected_invisibles = Vec::new();
2860 let mut offset = 0;
2861
2862 let mut push_char = |char_symbol| {
2863 input_text.push(char_symbol);
2864 let new_offset = match char_symbol {
2865 '\t' => {
2866 expected_invisibles.push(Invisible::Tab {
2867 line_start_offset: offset,
2868 });
2869 tab_size as usize
2870 }
2871 ' ' => {
2872 expected_invisibles.push(Invisible::Whitespace {
2873 line_offset: offset,
2874 });
2875 1
2876 }
2877 _ => 1,
2878 };
2879 offset += new_offset;
2880 };
2881
2882 for input_char in initial_str.chars() {
2883 push_char(input_char)
2884 }
2885
2886 (input_text, expected_invisibles)
2887 };
2888 assert_eq!(
2889 expected_invisibles.len(),
2890 initial_str
2891 .chars()
2892 .filter(|initial_char| initial_char.is_whitespace())
2893 .count()
2894 );
2895
2896 cx.update(|cx| {
2897 let mut test_settings = Settings::test(cx);
2898 test_settings.editor_defaults.show_whitespaces = Some(ShowWhitespaces::All);
2899 test_settings.editor_defaults.tab_size = Some(NonZeroU32::new(tab_size).unwrap());
2900 cx.set_global(test_settings);
2901 });
2902 let (_, editor) = cx.add_window(|cx| {
2903 let buffer = MultiBuffer::build_simple(&input_text, cx);
2904 Editor::new(EditorMode::Full, buffer, None, None, cx)
2905 });
2906
2907 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2908 let (_, layout_state) = editor.update(cx, |editor, cx| {
2909 let mut new_parents = Default::default();
2910 let mut notify_views_if_parents_change = Default::default();
2911 let mut layout_cx = LayoutContext::new(
2912 cx,
2913 &mut new_parents,
2914 &mut notify_views_if_parents_change,
2915 false,
2916 );
2917 element.layout(
2918 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2919 editor,
2920 &mut layout_cx,
2921 )
2922 });
2923
2924 let line_layouts = &layout_state.position_map.line_layouts;
2925 let actual_invisibles = line_layouts
2926 .iter()
2927 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
2928 .flatten()
2929 .sorted_by(|invisible_1, invisible_2| invisible_1.offset().cmp(&invisible_2.offset()))
2930 .cloned()
2931 .collect::<Vec<_>>();
2932
2933 assert_eq!(expected_invisibles, actual_invisibles);
2934 }
2935}