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