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, Invisible, 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, ShowInvisibles};
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_invisibles
1661 .or(settings.editor_defaults.show_invisibles)
1662 .unwrap_or_default()
1663 {
1664 ShowInvisibles::None => return,
1665 ShowInvisibles::Selection => Some(selection_ranges),
1666 ShowInvisibles::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
1699pub struct LineWithInvisibles {
1700 pub line: Line,
1701 invisibles: Vec<Invisible>,
1702}
1703
1704// TODO kb deduplicate? + tests
1705fn layout_highlighted_chunks<'a>(
1706 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1707 text_style: &TextStyle,
1708 text_layout_cache: &TextLayoutCache,
1709 font_cache: &Arc<FontCache>,
1710 max_line_len: usize,
1711 max_line_count: usize,
1712) -> Vec<LineWithInvisibles> {
1713 let mut layouts = Vec::with_capacity(max_line_count);
1714 let mut line = String::new();
1715 let mut invisibles = Vec::new();
1716 let mut styles = Vec::new();
1717 let mut row = 0;
1718 let mut line_exceeded_max_len = false;
1719 for highlighted_chunk in chunks.chain([HighlightedChunk {
1720 chunk: "\n",
1721 style: None,
1722 is_tab: false,
1723 }]) {
1724 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1725 if ix > 0 {
1726 layouts.push(LineWithInvisibles {
1727 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1728 invisibles: invisibles.drain(..).collect(),
1729 });
1730
1731 line.clear();
1732 styles.clear();
1733 row += 1;
1734 line_exceeded_max_len = false;
1735 if row == max_line_count {
1736 return layouts;
1737 }
1738 }
1739
1740 if !line_chunk.is_empty() && !line_exceeded_max_len {
1741 let text_style = if let Some(style) = highlighted_chunk.style {
1742 text_style
1743 .clone()
1744 .highlight(style, font_cache)
1745 .map(Cow::Owned)
1746 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1747 } else {
1748 Cow::Borrowed(text_style)
1749 };
1750
1751 if line.len() + line_chunk.len() > max_line_len {
1752 let mut chunk_len = max_line_len - line.len();
1753 while !line_chunk.is_char_boundary(chunk_len) {
1754 chunk_len -= 1;
1755 }
1756 line_chunk = &line_chunk[..chunk_len];
1757 line_exceeded_max_len = true;
1758 }
1759
1760 styles.push((
1761 line_chunk.len(),
1762 RunStyle {
1763 font_id: text_style.font_id,
1764 color: text_style.color,
1765 underline: text_style.underline,
1766 },
1767 ));
1768 if highlighted_chunk.is_tab {
1769 invisibles.push(Invisible::Tab {
1770 line_start_offset: line.len(),
1771 });
1772 } else {
1773 invisibles.extend(
1774 line_chunk
1775 .chars()
1776 .enumerate()
1777 .filter(|(_, line_char)| line_char.is_whitespace())
1778 .map(|(whitespace_index, _)| Invisible::Whitespace {
1779 line_offset: line.len() + whitespace_index,
1780 }),
1781 )
1782 }
1783 line.push_str(line_chunk);
1784 }
1785 }
1786 }
1787
1788 layouts
1789}
1790
1791impl Element<Editor> for EditorElement {
1792 type LayoutState = LayoutState;
1793 type PaintState = ();
1794
1795 fn layout(
1796 &mut self,
1797 constraint: SizeConstraint,
1798 editor: &mut Editor,
1799 cx: &mut LayoutContext<Editor>,
1800 ) -> (Vector2F, Self::LayoutState) {
1801 let mut size = constraint.max;
1802 if size.x().is_infinite() {
1803 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1804 }
1805
1806 let snapshot = editor.snapshot(cx);
1807 let style = self.style.clone();
1808 let line_height = style.text.line_height(cx.font_cache());
1809
1810 let gutter_padding;
1811 let gutter_width;
1812 let gutter_margin;
1813 if snapshot.mode == EditorMode::Full {
1814 let em_width = style.text.em_width(cx.font_cache());
1815 gutter_padding = (em_width * style.gutter_padding_factor).round();
1816 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1817 gutter_margin = -style.text.descent(cx.font_cache());
1818 } else {
1819 gutter_padding = 0.0;
1820 gutter_width = 0.0;
1821 gutter_margin = 0.0;
1822 };
1823
1824 let text_width = size.x() - gutter_width;
1825 let em_width = style.text.em_width(cx.font_cache());
1826 let em_advance = style.text.em_advance(cx.font_cache());
1827 let overscroll = vec2f(em_width, 0.);
1828 let snapshot = {
1829 editor.set_visible_line_count(size.y() / line_height);
1830
1831 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1832 let wrap_width = match editor.soft_wrap_mode(cx) {
1833 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1834 SoftWrap::EditorWidth => editor_width,
1835 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1836 };
1837
1838 if editor.set_wrap_width(Some(wrap_width), cx) {
1839 editor.snapshot(cx)
1840 } else {
1841 snapshot
1842 }
1843 };
1844
1845 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1846 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1847 size.set_y(
1848 scroll_height
1849 .min(constraint.max_along(Axis::Vertical))
1850 .max(constraint.min_along(Axis::Vertical))
1851 .min(line_height * max_lines as f32),
1852 )
1853 } else if let EditorMode::SingleLine = snapshot.mode {
1854 size.set_y(
1855 line_height
1856 .min(constraint.max_along(Axis::Vertical))
1857 .max(constraint.min_along(Axis::Vertical)),
1858 )
1859 } else if size.y().is_infinite() {
1860 size.set_y(scroll_height);
1861 }
1862 let gutter_size = vec2f(gutter_width, size.y());
1863 let text_size = vec2f(text_width, size.y());
1864
1865 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1866 let mut snapshot = editor.snapshot(cx);
1867
1868 let scroll_position = snapshot.scroll_position();
1869 // The scroll position is a fractional point, the whole number of which represents
1870 // the top of the window in terms of display rows.
1871 let start_row = scroll_position.y() as u32;
1872 let height_in_lines = size.y() / line_height;
1873 let max_row = snapshot.max_point().row();
1874
1875 // Add 1 to ensure selections bleed off screen
1876 let end_row = 1 + cmp::min(
1877 (scroll_position.y() + height_in_lines).ceil() as u32,
1878 max_row,
1879 );
1880
1881 let start_anchor = if start_row == 0 {
1882 Anchor::min()
1883 } else {
1884 snapshot
1885 .buffer_snapshot
1886 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1887 };
1888 let end_anchor = if end_row > max_row {
1889 Anchor::max()
1890 } else {
1891 snapshot
1892 .buffer_snapshot
1893 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1894 };
1895
1896 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1897 let mut active_rows = BTreeMap::new();
1898 let mut fold_ranges = Vec::new();
1899 let is_singleton = editor.is_singleton(cx);
1900
1901 let highlighted_rows = editor.highlighted_rows();
1902 let theme = cx.global::<Settings>().theme.as_ref();
1903 let highlighted_ranges = editor.background_highlights_in_range(
1904 start_anchor..end_anchor,
1905 &snapshot.display_snapshot,
1906 theme,
1907 );
1908
1909 fold_ranges.extend(
1910 snapshot
1911 .folds_in_range(start_anchor..end_anchor)
1912 .map(|anchor| {
1913 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1914 (
1915 start.row,
1916 start.to_display_point(&snapshot.display_snapshot)
1917 ..anchor.end.to_display_point(&snapshot),
1918 )
1919 }),
1920 );
1921
1922 let mut remote_selections = HashMap::default();
1923 for (replica_id, line_mode, cursor_shape, selection) in snapshot
1924 .buffer_snapshot
1925 .remote_selections_in_range(&(start_anchor..end_anchor))
1926 {
1927 // The local selections match the leader's selections.
1928 if Some(replica_id) == editor.leader_replica_id {
1929 continue;
1930 }
1931 remote_selections
1932 .entry(replica_id)
1933 .or_insert(Vec::new())
1934 .push(SelectionLayout::new(
1935 selection,
1936 line_mode,
1937 cursor_shape,
1938 &snapshot.display_snapshot,
1939 ));
1940 }
1941 selections.extend(remote_selections);
1942
1943 if editor.show_local_selections {
1944 let mut local_selections = editor
1945 .selections
1946 .disjoint_in_range(start_anchor..end_anchor, cx);
1947 local_selections.extend(editor.selections.pending(cx));
1948 for selection in &local_selections {
1949 let is_empty = selection.start == selection.end;
1950 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1951 let selection_end = snapshot.next_line_boundary(selection.end).1;
1952 for row in cmp::max(selection_start.row(), start_row)
1953 ..=cmp::min(selection_end.row(), end_row)
1954 {
1955 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1956 *contains_non_empty_selection |= !is_empty;
1957 }
1958 }
1959
1960 // Render the local selections in the leader's color when following.
1961 let local_replica_id = editor
1962 .leader_replica_id
1963 .unwrap_or_else(|| editor.replica_id(cx));
1964
1965 selections.push((
1966 local_replica_id,
1967 local_selections
1968 .into_iter()
1969 .map(|selection| {
1970 SelectionLayout::new(
1971 selection,
1972 editor.selections.line_mode,
1973 editor.cursor_shape,
1974 &snapshot.display_snapshot,
1975 )
1976 })
1977 .collect(),
1978 ));
1979 }
1980
1981 let show_scrollbars = editor.scroll_manager.scrollbars_visible();
1982 let include_root = editor
1983 .project
1984 .as_ref()
1985 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1986 .unwrap_or_default();
1987
1988 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1989 .into_iter()
1990 .map(|(id, fold)| {
1991 let color = self
1992 .style
1993 .folds
1994 .ellipses
1995 .background
1996 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1997 .color;
1998
1999 (id, fold, color)
2000 })
2001 .collect();
2002
2003 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2004 start_row..end_row,
2005 &active_rows,
2006 is_singleton,
2007 &snapshot,
2008 cx,
2009 );
2010
2011 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2012
2013 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2014
2015 let mut max_visible_line_width = 0.0;
2016 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
2017 for line_with_invisibles in &line_layouts {
2018 if line_with_invisibles.line.width() > max_visible_line_width {
2019 max_visible_line_width = line_with_invisibles.line.width();
2020 }
2021 }
2022
2023 let style = self.style.clone();
2024 let longest_line_width = layout_line(
2025 snapshot.longest_row(),
2026 &snapshot,
2027 &style,
2028 cx.text_layout_cache(),
2029 )
2030 .width();
2031 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2032 let em_width = style.text.em_width(cx.font_cache());
2033 let (scroll_width, blocks) = self.layout_blocks(
2034 start_row..end_row,
2035 &snapshot,
2036 size.x(),
2037 scroll_width,
2038 gutter_padding,
2039 gutter_width,
2040 em_width,
2041 gutter_width + gutter_margin,
2042 line_height,
2043 &style,
2044 &line_layouts,
2045 include_root,
2046 editor,
2047 cx,
2048 );
2049
2050 let scroll_max = vec2f(
2051 ((scroll_width - text_size.x()) / em_width).max(0.0),
2052 max_row as f32,
2053 );
2054
2055 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2056
2057 let autoscrolled = if autoscroll_horizontally {
2058 editor.autoscroll_horizontally(
2059 start_row,
2060 text_size.x(),
2061 scroll_width,
2062 em_width,
2063 &line_layouts,
2064 cx,
2065 )
2066 } else {
2067 false
2068 };
2069
2070 if clamped || autoscrolled {
2071 snapshot = editor.snapshot(cx);
2072 }
2073
2074 let newest_selection_head = editor
2075 .selections
2076 .newest::<usize>(cx)
2077 .head()
2078 .to_display_point(&snapshot);
2079 let style = editor.style(cx);
2080
2081 let mut context_menu = None;
2082 let mut code_actions_indicator = None;
2083 if (start_row..end_row).contains(&newest_selection_head.row()) {
2084 if editor.context_menu_visible() {
2085 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2086 }
2087
2088 let active = matches!(
2089 editor.context_menu,
2090 Some(crate::ContextMenu::CodeActions(_))
2091 );
2092
2093 code_actions_indicator = editor
2094 .render_code_actions_indicator(&style, active, cx)
2095 .map(|indicator| (newest_selection_head.row(), indicator));
2096 }
2097
2098 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2099 let mut hover = editor
2100 .hover_state
2101 .render(&snapshot, &style, visible_rows, cx);
2102 let mode = editor.mode;
2103
2104 let mut fold_indicators = editor.render_fold_indicators(
2105 fold_statuses,
2106 &style,
2107 editor.gutter_hovered,
2108 line_height,
2109 gutter_margin,
2110 cx,
2111 );
2112
2113 if let Some((_, context_menu)) = context_menu.as_mut() {
2114 context_menu.layout(
2115 SizeConstraint {
2116 min: Vector2F::zero(),
2117 max: vec2f(
2118 cx.window_size().x() * 0.7,
2119 (12. * line_height).min((size.y() - line_height) / 2.),
2120 ),
2121 },
2122 editor,
2123 cx,
2124 );
2125 }
2126
2127 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2128 indicator.layout(
2129 SizeConstraint::strict_along(
2130 Axis::Vertical,
2131 line_height * style.code_actions.vertical_scale,
2132 ),
2133 editor,
2134 cx,
2135 );
2136 }
2137
2138 for fold_indicator in fold_indicators.iter_mut() {
2139 if let Some(indicator) = fold_indicator.as_mut() {
2140 indicator.layout(
2141 SizeConstraint::strict_along(
2142 Axis::Vertical,
2143 line_height * style.code_actions.vertical_scale,
2144 ),
2145 editor,
2146 cx,
2147 );
2148 }
2149 }
2150
2151 if let Some((_, hover_popovers)) = hover.as_mut() {
2152 for hover_popover in hover_popovers.iter_mut() {
2153 hover_popover.layout(
2154 SizeConstraint {
2155 min: Vector2F::zero(),
2156 max: vec2f(
2157 (120. * em_width) // Default size
2158 .min(size.x() / 2.) // Shrink to half of the editor width
2159 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2160 (16. * line_height) // Default size
2161 .min(size.y() / 2.) // Shrink to half of the editor height
2162 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2163 ),
2164 },
2165 editor,
2166 cx,
2167 );
2168 }
2169 }
2170
2171 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2172 let invisible_symbol_style = RunStyle {
2173 color: self.style.line_number,
2174 font_id: self.style.text.font_id,
2175 underline: Default::default(),
2176 };
2177
2178 (
2179 size,
2180 LayoutState {
2181 mode,
2182 position_map: Arc::new(PositionMap {
2183 size,
2184 scroll_max,
2185 line_layouts,
2186 line_height,
2187 em_width,
2188 em_advance,
2189 snapshot,
2190 }),
2191 visible_display_row_range: start_row..end_row,
2192 gutter_size,
2193 gutter_padding,
2194 text_size,
2195 scrollbar_row_range,
2196 show_scrollbars,
2197 max_row,
2198 gutter_margin,
2199 active_rows,
2200 highlighted_rows,
2201 highlighted_ranges,
2202 fold_ranges,
2203 line_number_layouts,
2204 display_hunks,
2205 blocks,
2206 selections,
2207 context_menu,
2208 code_actions_indicator,
2209 fold_indicators,
2210 tab_invisible: cx.text_layout_cache().layout_str(
2211 "→",
2212 invisible_symbol_font_size,
2213 &[("→".len(), invisible_symbol_style)],
2214 ),
2215 space_invisible: cx.text_layout_cache().layout_str(
2216 "•",
2217 invisible_symbol_font_size,
2218 &[("•".len(), invisible_symbol_style)],
2219 ),
2220 hover_popovers: hover,
2221 },
2222 )
2223 }
2224
2225 fn paint(
2226 &mut self,
2227 scene: &mut SceneBuilder,
2228 bounds: RectF,
2229 visible_bounds: RectF,
2230 layout: &mut Self::LayoutState,
2231 editor: &mut Editor,
2232 cx: &mut ViewContext<Editor>,
2233 ) -> Self::PaintState {
2234 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2235 scene.push_layer(Some(visible_bounds));
2236
2237 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2238 let text_bounds = RectF::new(
2239 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2240 layout.text_size,
2241 );
2242
2243 Self::attach_mouse_handlers(
2244 scene,
2245 &layout.position_map,
2246 layout.hover_popovers.is_some(),
2247 visible_bounds,
2248 text_bounds,
2249 gutter_bounds,
2250 bounds,
2251 cx,
2252 );
2253
2254 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2255 if layout.gutter_size.x() > 0. {
2256 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2257 }
2258 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2259
2260 scene.push_layer(Some(bounds));
2261 if !layout.blocks.is_empty() {
2262 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2263 }
2264 self.paint_scrollbar(scene, bounds, layout, cx);
2265 scene.pop_layer();
2266
2267 scene.pop_layer();
2268 }
2269
2270 fn rect_for_text_range(
2271 &self,
2272 range_utf16: Range<usize>,
2273 bounds: RectF,
2274 _: RectF,
2275 layout: &Self::LayoutState,
2276 _: &Self::PaintState,
2277 _: &Editor,
2278 _: &ViewContext<Editor>,
2279 ) -> Option<RectF> {
2280 let text_bounds = RectF::new(
2281 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2282 layout.text_size,
2283 );
2284 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2285 let scroll_position = layout.position_map.snapshot.scroll_position();
2286 let start_row = scroll_position.y() as u32;
2287 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2288 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2289
2290 let range_start = OffsetUtf16(range_utf16.start)
2291 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2292 if range_start.row() < start_row {
2293 return None;
2294 }
2295
2296 let line = &layout
2297 .position_map
2298 .line_layouts
2299 .get((range_start.row() - start_row) as usize)?
2300 .line;
2301 let range_start_x = line.x_for_index(range_start.column() as usize);
2302 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2303 Some(RectF::new(
2304 content_origin
2305 + vec2f(
2306 range_start_x,
2307 range_start_y + layout.position_map.line_height,
2308 )
2309 - vec2f(scroll_left, scroll_top),
2310 vec2f(
2311 layout.position_map.em_width,
2312 layout.position_map.line_height,
2313 ),
2314 ))
2315 }
2316
2317 fn debug(
2318 &self,
2319 bounds: RectF,
2320 _: &Self::LayoutState,
2321 _: &Self::PaintState,
2322 _: &Editor,
2323 _: &ViewContext<Editor>,
2324 ) -> json::Value {
2325 json!({
2326 "type": "BufferElement",
2327 "bounds": bounds.to_json()
2328 })
2329 }
2330}
2331
2332type BufferRow = u32;
2333
2334pub struct LayoutState {
2335 position_map: Arc<PositionMap>,
2336 gutter_size: Vector2F,
2337 gutter_padding: f32,
2338 gutter_margin: f32,
2339 text_size: Vector2F,
2340 mode: EditorMode,
2341 visible_display_row_range: Range<u32>,
2342 active_rows: BTreeMap<u32, bool>,
2343 highlighted_rows: Option<Range<u32>>,
2344 line_number_layouts: Vec<Option<text_layout::Line>>,
2345 display_hunks: Vec<DisplayDiffHunk>,
2346 blocks: Vec<BlockLayout>,
2347 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2348 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2349 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2350 scrollbar_row_range: Range<f32>,
2351 show_scrollbars: bool,
2352 max_row: u32,
2353 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2354 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2355 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2356 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2357 tab_invisible: Line,
2358 space_invisible: Line,
2359}
2360
2361struct PositionMap {
2362 size: Vector2F,
2363 line_height: f32,
2364 scroll_max: Vector2F,
2365 em_width: f32,
2366 em_advance: f32,
2367 line_layouts: Vec<LineWithInvisibles>,
2368 snapshot: EditorSnapshot,
2369}
2370
2371impl PositionMap {
2372 /// Returns two display points:
2373 /// 1. The nearest *valid* position in the editor
2374 /// 2. An unclipped, potentially *invalid* position that maps directly to
2375 /// the given pixel position.
2376 fn point_for_position(
2377 &self,
2378 text_bounds: RectF,
2379 position: Vector2F,
2380 ) -> (DisplayPoint, DisplayPoint) {
2381 let scroll_position = self.snapshot.scroll_position();
2382 let position = position - text_bounds.origin();
2383 let y = position.y().max(0.0).min(self.size.y());
2384 let x = position.x() + (scroll_position.x() * self.em_width);
2385 let row = (y / self.line_height + scroll_position.y()) as u32;
2386 let (column, x_overshoot) = if let Some(line) = self
2387 .line_layouts
2388 .get(row as usize - scroll_position.y() as usize)
2389 .map(|line_with_spaces| &line_with_spaces.line)
2390 {
2391 if let Some(ix) = line.index_for_x(x) {
2392 (ix as u32, 0.0)
2393 } else {
2394 (line.len() as u32, 0f32.max(x - line.width()))
2395 }
2396 } else {
2397 (0, x)
2398 };
2399
2400 let mut target_point = DisplayPoint::new(row, column);
2401 let point = self.snapshot.clip_point(target_point, Bias::Left);
2402 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2403
2404 (point, target_point)
2405 }
2406}
2407
2408struct BlockLayout {
2409 row: u32,
2410 element: AnyElement<Editor>,
2411 style: BlockStyle,
2412}
2413
2414fn layout_line(
2415 row: u32,
2416 snapshot: &EditorSnapshot,
2417 style: &EditorStyle,
2418 layout_cache: &TextLayoutCache,
2419) -> text_layout::Line {
2420 let mut line = snapshot.line(row);
2421
2422 if line.len() > MAX_LINE_LEN {
2423 let mut len = MAX_LINE_LEN;
2424 while !line.is_char_boundary(len) {
2425 len -= 1;
2426 }
2427
2428 line.truncate(len);
2429 }
2430
2431 layout_cache.layout_str(
2432 &line,
2433 style.text.font_size,
2434 &[(
2435 snapshot.line_len(row) as usize,
2436 RunStyle {
2437 font_id: style.text.font_id,
2438 color: Color::black(),
2439 underline: Default::default(),
2440 },
2441 )],
2442 )
2443}
2444
2445#[derive(Debug)]
2446pub struct Cursor {
2447 origin: Vector2F,
2448 block_width: f32,
2449 line_height: f32,
2450 color: Color,
2451 shape: CursorShape,
2452 block_text: Option<Line>,
2453}
2454
2455impl Cursor {
2456 pub fn new(
2457 origin: Vector2F,
2458 block_width: f32,
2459 line_height: f32,
2460 color: Color,
2461 shape: CursorShape,
2462 block_text: Option<Line>,
2463 ) -> Cursor {
2464 Cursor {
2465 origin,
2466 block_width,
2467 line_height,
2468 color,
2469 shape,
2470 block_text,
2471 }
2472 }
2473
2474 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2475 RectF::new(
2476 self.origin + origin,
2477 vec2f(self.block_width, self.line_height),
2478 )
2479 }
2480
2481 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2482 let bounds = match self.shape {
2483 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2484 CursorShape::Block | CursorShape::Hollow => RectF::new(
2485 self.origin + origin,
2486 vec2f(self.block_width, self.line_height),
2487 ),
2488 CursorShape::Underscore => RectF::new(
2489 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2490 vec2f(self.block_width, 2.0),
2491 ),
2492 };
2493
2494 //Draw background or border quad
2495 if matches!(self.shape, CursorShape::Hollow) {
2496 scene.push_quad(Quad {
2497 bounds,
2498 background: None,
2499 border: Border::all(1., self.color),
2500 corner_radius: 0.,
2501 });
2502 } else {
2503 scene.push_quad(Quad {
2504 bounds,
2505 background: Some(self.color),
2506 border: Default::default(),
2507 corner_radius: 0.,
2508 });
2509 }
2510
2511 if let Some(block_text) = &self.block_text {
2512 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2513 }
2514 }
2515
2516 pub fn shape(&self) -> CursorShape {
2517 self.shape
2518 }
2519}
2520
2521#[derive(Debug)]
2522pub struct HighlightedRange {
2523 pub start_y: f32,
2524 pub line_height: f32,
2525 pub lines: Vec<HighlightedRangeLine>,
2526 pub color: Color,
2527 pub corner_radius: f32,
2528}
2529
2530#[derive(Debug)]
2531pub struct HighlightedRangeLine {
2532 pub start_x: f32,
2533 pub end_x: f32,
2534}
2535
2536impl HighlightedRange {
2537 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2538 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2539 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2540 self.paint_lines(
2541 self.start_y + self.line_height,
2542 &self.lines[1..],
2543 bounds,
2544 scene,
2545 );
2546 } else {
2547 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2548 }
2549 }
2550
2551 fn paint_lines(
2552 &self,
2553 start_y: f32,
2554 lines: &[HighlightedRangeLine],
2555 bounds: RectF,
2556 scene: &mut SceneBuilder,
2557 ) {
2558 if lines.is_empty() {
2559 return;
2560 }
2561
2562 let mut path = PathBuilder::new();
2563 let first_line = lines.first().unwrap();
2564 let last_line = lines.last().unwrap();
2565
2566 let first_top_left = vec2f(first_line.start_x, start_y);
2567 let first_top_right = vec2f(first_line.end_x, start_y);
2568
2569 let curve_height = vec2f(0., self.corner_radius);
2570 let curve_width = |start_x: f32, end_x: f32| {
2571 let max = (end_x - start_x) / 2.;
2572 let width = if max < self.corner_radius {
2573 max
2574 } else {
2575 self.corner_radius
2576 };
2577
2578 vec2f(width, 0.)
2579 };
2580
2581 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2582 path.reset(first_top_right - top_curve_width);
2583 path.curve_to(first_top_right + curve_height, first_top_right);
2584
2585 let mut iter = lines.iter().enumerate().peekable();
2586 while let Some((ix, line)) = iter.next() {
2587 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2588
2589 if let Some((_, next_line)) = iter.peek() {
2590 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2591
2592 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2593 Ordering::Equal => {
2594 path.line_to(bottom_right);
2595 }
2596 Ordering::Less => {
2597 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2598 path.line_to(bottom_right - curve_height);
2599 if self.corner_radius > 0. {
2600 path.curve_to(bottom_right - curve_width, bottom_right);
2601 }
2602 path.line_to(next_top_right + curve_width);
2603 if self.corner_radius > 0. {
2604 path.curve_to(next_top_right + curve_height, next_top_right);
2605 }
2606 }
2607 Ordering::Greater => {
2608 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2609 path.line_to(bottom_right - curve_height);
2610 if self.corner_radius > 0. {
2611 path.curve_to(bottom_right + curve_width, bottom_right);
2612 }
2613 path.line_to(next_top_right - curve_width);
2614 if self.corner_radius > 0. {
2615 path.curve_to(next_top_right + curve_height, next_top_right);
2616 }
2617 }
2618 }
2619 } else {
2620 let curve_width = curve_width(line.start_x, line.end_x);
2621 path.line_to(bottom_right - curve_height);
2622 if self.corner_radius > 0. {
2623 path.curve_to(bottom_right - curve_width, bottom_right);
2624 }
2625
2626 let bottom_left = vec2f(line.start_x, bottom_right.y());
2627 path.line_to(bottom_left + curve_width);
2628 if self.corner_radius > 0. {
2629 path.curve_to(bottom_left - curve_height, bottom_left);
2630 }
2631 }
2632 }
2633
2634 if first_line.start_x > last_line.start_x {
2635 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2636 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2637 path.line_to(second_top_left + curve_height);
2638 if self.corner_radius > 0. {
2639 path.curve_to(second_top_left + curve_width, second_top_left);
2640 }
2641 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2642 path.line_to(first_bottom_left - curve_width);
2643 if self.corner_radius > 0. {
2644 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2645 }
2646 }
2647
2648 path.line_to(first_top_left + curve_height);
2649 if self.corner_radius > 0. {
2650 path.curve_to(first_top_left + top_curve_width, first_top_left);
2651 }
2652 path.line_to(first_top_right - top_curve_width);
2653
2654 scene.push_path(path.build(self.color, Some(bounds)));
2655 }
2656}
2657
2658fn position_to_display_point(
2659 position: Vector2F,
2660 text_bounds: RectF,
2661 position_map: &PositionMap,
2662) -> Option<DisplayPoint> {
2663 if text_bounds.contains_point(position) {
2664 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2665 if point == target_point {
2666 Some(point)
2667 } else {
2668 None
2669 }
2670 } else {
2671 None
2672 }
2673}
2674
2675fn range_to_bounds(
2676 range: &Range<DisplayPoint>,
2677 content_origin: Vector2F,
2678 scroll_left: f32,
2679 scroll_top: f32,
2680 visible_row_range: &Range<u32>,
2681 line_end_overshoot: f32,
2682 position_map: &PositionMap,
2683) -> impl Iterator<Item = RectF> {
2684 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2685
2686 if range.start == range.end {
2687 return bounds.into_iter();
2688 }
2689
2690 let start_row = visible_row_range.start;
2691 let end_row = visible_row_range.end;
2692
2693 let row_range = if range.end.column() == 0 {
2694 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2695 } else {
2696 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2697 };
2698
2699 let first_y =
2700 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2701
2702 for (idx, row) in row_range.enumerate() {
2703 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2704
2705 let start_x = if row == range.start.row() {
2706 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2707 - scroll_left
2708 } else {
2709 content_origin.x() - scroll_left
2710 };
2711
2712 let end_x = if row == range.end.row() {
2713 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2714 } else {
2715 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2716 };
2717
2718 bounds.push(RectF::from_points(
2719 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2720 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2721 ))
2722 }
2723
2724 bounds.into_iter()
2725}
2726
2727pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2728 delta.powf(1.5) / 100.0
2729}
2730
2731fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2732 delta.powf(1.2) / 300.0
2733}
2734
2735#[cfg(test)]
2736mod tests {
2737 use super::*;
2738 use crate::{
2739 display_map::{BlockDisposition, BlockProperties},
2740 Editor, MultiBuffer,
2741 };
2742 use gpui::TestAppContext;
2743 use settings::Settings;
2744 use std::sync::Arc;
2745 use util::test::sample_text;
2746
2747 #[gpui::test]
2748 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2749 cx.update(|cx| cx.set_global(Settings::test(cx)));
2750 let (_, editor) = cx.add_window(|cx| {
2751 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2752 Editor::new(EditorMode::Full, buffer, None, None, cx)
2753 });
2754 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2755
2756 let layouts = editor.update(cx, |editor, cx| {
2757 let snapshot = editor.snapshot(cx);
2758 element
2759 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2760 .0
2761 });
2762 assert_eq!(layouts.len(), 6);
2763 }
2764
2765 #[gpui::test]
2766 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2767 cx.update(|cx| cx.set_global(Settings::test(cx)));
2768 let (_, editor) = cx.add_window(|cx| {
2769 let buffer = MultiBuffer::build_simple("", cx);
2770 Editor::new(EditorMode::Full, buffer, None, None, cx)
2771 });
2772
2773 editor.update(cx, |editor, cx| {
2774 editor.set_placeholder_text("hello", cx);
2775 editor.insert_blocks(
2776 [BlockProperties {
2777 style: BlockStyle::Fixed,
2778 disposition: BlockDisposition::Above,
2779 height: 3,
2780 position: Anchor::min(),
2781 render: Arc::new(|_| Empty::new().into_any()),
2782 }],
2783 cx,
2784 );
2785
2786 // Blur the editor so that it displays placeholder text.
2787 cx.blur();
2788 });
2789
2790 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2791 let (size, mut state) = editor.update(cx, |editor, cx| {
2792 let mut new_parents = Default::default();
2793 let mut notify_views_if_parents_change = Default::default();
2794 let mut layout_cx = LayoutContext::new(
2795 cx,
2796 &mut new_parents,
2797 &mut notify_views_if_parents_change,
2798 false,
2799 );
2800 element.layout(
2801 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2802 editor,
2803 &mut layout_cx,
2804 )
2805 });
2806
2807 assert_eq!(state.position_map.line_layouts.len(), 4);
2808 assert_eq!(
2809 state
2810 .line_number_layouts
2811 .iter()
2812 .map(Option::is_some)
2813 .collect::<Vec<_>>(),
2814 &[false, false, false, true]
2815 );
2816
2817 // Don't panic.
2818 let mut scene = SceneBuilder::new(1.0);
2819 let bounds = RectF::new(Default::default(), size);
2820 editor.update(cx, |editor, cx| {
2821 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2822 });
2823 }
2824}