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