1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, Select, SelectPhase, SoftWrap,
4 ToPoint, MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 git::{diff_hunk_to_display, DisplayDiffHunk},
9 hover_popover::{
10 HideHover, HoverAt, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
11 },
12 link_go_to_definition::{
13 GoToFetchedDefinition, GoToFetchedTypeDefinition, UpdateGoToDefinitionLink,
14 },
15 mouse_context_menu::DeployMouseContextMenu,
16 scroll::actions::Scroll,
17 EditorStyle, GutterHover, UnfoldAt,
18};
19use clock::ReplicaId;
20use collections::{BTreeMap, HashMap};
21use git::diff::DiffHunkStatus;
22use gpui::{
23 color::Color,
24 elements::*,
25 fonts::{HighlightStyle, Underline},
26 geometry::{
27 rect::RectF,
28 vector::{vec2f, Vector2F},
29 PathBuilder,
30 },
31 json::{self, ToJson},
32 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
33 text_layout::{self, Line, RunStyle, TextLayoutCache},
34 AnyElement, Axis, Border, CursorRegion, Element, EventContext, MouseRegion, Quad, SceneBuilder,
35 SizeConstraint, ViewContext, WindowContext,
36};
37use itertools::Itertools;
38use json::json;
39use language::{Bias, CursorShape, DiagnosticSeverity, OffsetUtf16, Selection};
40use project::ProjectPath;
41use settings::{GitGutter, Settings};
42use smallvec::SmallVec;
43use std::{
44 cmp::{self, Ordering},
45 fmt::Write,
46 iter,
47 ops::Range,
48 sync::Arc,
49};
50use workspace::item::Item;
51
52enum FoldMarkers {}
53
54struct SelectionLayout {
55 head: DisplayPoint,
56 cursor_shape: CursorShape,
57 range: Range<DisplayPoint>,
58}
59
60impl SelectionLayout {
61 fn new<T: ToPoint + ToDisplayPoint + Clone>(
62 selection: Selection<T>,
63 line_mode: bool,
64 cursor_shape: CursorShape,
65 map: &DisplaySnapshot,
66 ) -> Self {
67 if line_mode {
68 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
69 let point_range = map.expand_to_line(selection.range());
70 Self {
71 head: selection.head().to_display_point(map),
72 cursor_shape,
73 range: point_range.start.to_display_point(map)
74 ..point_range.end.to_display_point(map),
75 }
76 } else {
77 let selection = selection.map(|p| p.to_display_point(map));
78 Self {
79 head: selection.head(),
80 cursor_shape,
81 range: selection.range(),
82 }
83 }
84 }
85}
86
87#[derive(Clone)]
88pub struct EditorElement {
89 style: Arc<EditorStyle>,
90}
91
92impl EditorElement {
93 pub fn new(style: EditorStyle) -> Self {
94 Self {
95 style: Arc::new(style),
96 }
97 }
98
99 fn attach_mouse_handlers(
100 scene: &mut SceneBuilder,
101 position_map: &Arc<PositionMap>,
102 has_popovers: bool,
103 visible_bounds: RectF,
104 text_bounds: RectF,
105 gutter_bounds: RectF,
106 bounds: RectF,
107 cx: &mut ViewContext<Editor>,
108 ) {
109 enum EditorElementMouseHandlers {}
110 scene.push_mouse_region(
111 MouseRegion::new::<EditorElementMouseHandlers>(
112 cx.view_id(),
113 cx.view_id(),
114 visible_bounds,
115 )
116 .on_down(MouseButton::Left, {
117 let position_map = position_map.clone();
118 move |e, _, cx| {
119 if !Self::mouse_down(
120 e.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, _, cx| {
133 if !Self::mouse_right_down(
134 event.position,
135 position_map.as_ref(),
136 text_bounds,
137 cx,
138 ) {
139 cx.propagate_event();
140 }
141 }
142 })
143 .on_up(MouseButton::Left, {
144 let position_map = position_map.clone();
145 move |event, editor, cx| {
146 if !Self::mouse_up(
147 event.position,
148 event.cmd,
149 event.shift,
150 position_map.as_ref(),
151 text_bounds,
152 editor,
153 cx,
154 ) {
155 cx.propagate_event()
156 }
157 }
158 })
159 .on_drag(MouseButton::Left, {
160 let position_map = position_map.clone();
161 move |event, editor, cx| {
162 if !Self::mouse_dragged(
163 event.platform_event,
164 position_map.as_ref(),
165 text_bounds,
166 editor,
167 cx,
168 ) {
169 cx.propagate_event()
170 }
171 }
172 })
173 .on_move({
174 let position_map = position_map.clone();
175 move |e, _, cx| {
176 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
177 cx.propagate_event()
178 }
179 }
180 })
181 .on_move_out(move |_, _: &mut Editor, cx| {
182 if has_popovers {
183 cx.dispatch_action(HideHover);
184 }
185 })
186 .on_scroll({
187 let position_map = position_map.clone();
188 move |e, _, cx| {
189 if !Self::scroll(
190 e.position,
191 *e.delta.raw(),
192 e.delta.precise(),
193 &position_map,
194 bounds,
195 cx,
196 ) {
197 cx.propagate_event()
198 }
199 }
200 }),
201 );
202
203 enum GutterHandlers {}
204 scene.push_mouse_region(
205 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
206 .on_hover(|hover, _: &mut Editor, cx| {
207 cx.dispatch_action(GutterHover {
208 hovered: hover.started,
209 })
210 }),
211 )
212 }
213
214 fn mouse_down(
215 MouseButtonEvent {
216 position,
217 modifiers:
218 Modifiers {
219 shift,
220 ctrl,
221 alt,
222 cmd,
223 ..
224 },
225 mut click_count,
226 ..
227 }: MouseButtonEvent,
228 position_map: &PositionMap,
229 text_bounds: RectF,
230 gutter_bounds: RectF,
231 cx: &mut EventContext<Editor>,
232 ) -> bool {
233 if gutter_bounds.contains_point(position) {
234 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
235 } else if !text_bounds.contains_point(position) {
236 return false;
237 }
238
239 let (position, target_position) = position_map.point_for_position(text_bounds, position);
240
241 if shift && alt {
242 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
243 position,
244 goal_column: target_position.column(),
245 }));
246 } else if shift && !ctrl && !alt && !cmd {
247 cx.dispatch_action(Select(SelectPhase::Extend {
248 position,
249 click_count,
250 }));
251 } else {
252 cx.dispatch_action(Select(SelectPhase::Begin {
253 position,
254 add: alt,
255 click_count,
256 }));
257 }
258
259 true
260 }
261
262 fn mouse_right_down(
263 position: Vector2F,
264 position_map: &PositionMap,
265 text_bounds: RectF,
266 cx: &mut EventContext<Editor>,
267 ) -> bool {
268 if !text_bounds.contains_point(position) {
269 return false;
270 }
271
272 let (point, _) = position_map.point_for_position(text_bounds, position);
273
274 cx.dispatch_action(DeployMouseContextMenu { position, point });
275 true
276 }
277
278 fn mouse_up(
279 position: Vector2F,
280 cmd: bool,
281 shift: bool,
282 position_map: &PositionMap,
283 text_bounds: RectF,
284 editor: &mut Editor,
285 cx: &mut EventContext<Editor>,
286 ) -> bool {
287 let end_selection = editor.has_pending_selection();
288 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
289
290 if end_selection {
291 cx.dispatch_action(Select(SelectPhase::End));
292 }
293
294 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
295 let (point, target_point) = position_map.point_for_position(text_bounds, position);
296
297 if point == target_point {
298 if shift {
299 cx.dispatch_action(GoToFetchedTypeDefinition { point });
300 } else {
301 cx.dispatch_action(GoToFetchedDefinition { point });
302 }
303
304 return true;
305 }
306 }
307
308 end_selection
309 }
310
311 fn mouse_dragged(
312 MouseMovedEvent {
313 modifiers: Modifiers { cmd, shift, .. },
314 position,
315 ..
316 }: MouseMovedEvent,
317 position_map: &PositionMap,
318 text_bounds: RectF,
319 editor: &mut Editor,
320 cx: &mut EventContext<Editor>,
321 ) -> bool {
322 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
323 // Don't trigger hover popover if mouse is hovering over context menu
324 let point = if text_bounds.contains_point(position) {
325 let (point, target_point) = position_map.point_for_position(text_bounds, position);
326 if point == target_point {
327 Some(point)
328 } else {
329 None
330 }
331 } else {
332 None
333 };
334
335 cx.dispatch_action(UpdateGoToDefinitionLink {
336 point,
337 cmd_held: cmd,
338 shift_held: shift,
339 });
340
341 if editor.has_pending_selection() {
342 let mut scroll_delta = Vector2F::zero();
343
344 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
345 let top = text_bounds.origin_y() + vertical_margin;
346 let bottom = text_bounds.lower_left().y() - vertical_margin;
347 if position.y() < top {
348 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
349 }
350 if position.y() > bottom {
351 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
352 }
353
354 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
355 let left = text_bounds.origin_x() + horizontal_margin;
356 let right = text_bounds.upper_right().x() - horizontal_margin;
357 if position.x() < left {
358 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
359 left - position.x(),
360 ))
361 }
362 if position.x() > right {
363 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
364 position.x() - right,
365 ))
366 }
367
368 let (position, target_position) =
369 position_map.point_for_position(text_bounds, position);
370
371 cx.dispatch_action(Select(SelectPhase::Update {
372 position,
373 goal_column: target_position.column(),
374 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
375 .clamp(Vector2F::zero(), position_map.scroll_max),
376 }));
377
378 cx.dispatch_action(HoverAt { point });
379 true
380 } else {
381 cx.dispatch_action(HoverAt { point });
382 false
383 }
384 }
385
386 fn mouse_moved(
387 MouseMovedEvent {
388 modifiers: Modifiers { shift, cmd, .. },
389 position,
390 ..
391 }: MouseMovedEvent,
392 position_map: &PositionMap,
393 text_bounds: RectF,
394 cx: &mut ViewContext<Editor>,
395 ) -> bool {
396 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
397 // Don't trigger hover popover if mouse is hovering over context menu
398 let point = position_to_display_point(position, text_bounds, position_map);
399
400 cx.dispatch_action(UpdateGoToDefinitionLink {
401 point,
402 cmd_held: cmd,
403 shift_held: shift,
404 });
405
406 cx.dispatch_action(HoverAt { point });
407
408 true
409 }
410
411 fn scroll(
412 position: Vector2F,
413 mut delta: Vector2F,
414 precise: bool,
415 position_map: &PositionMap,
416 bounds: RectF,
417 cx: &mut ViewContext<Editor>,
418 ) -> bool {
419 if !bounds.contains_point(position) {
420 return false;
421 }
422
423 let line_height = position_map.line_height;
424 let max_glyph_width = position_map.em_width;
425
426 let axis = if precise {
427 //Trackpad
428 position_map.snapshot.ongoing_scroll.filter(&mut delta)
429 } else {
430 //Not trackpad
431 delta *= vec2f(max_glyph_width, line_height);
432 None //Resets ongoing scroll
433 };
434
435 let scroll_position = position_map.snapshot.scroll_position();
436 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
437 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
438 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
439
440 cx.dispatch_action(Scroll {
441 scroll_position,
442 axis,
443 });
444
445 true
446 }
447
448 fn paint_background(
449 &self,
450 scene: &mut SceneBuilder,
451 gutter_bounds: RectF,
452 text_bounds: RectF,
453 layout: &LayoutState,
454 ) {
455 let bounds = gutter_bounds.union_rect(text_bounds);
456 let scroll_top =
457 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
458 scene.push_quad(Quad {
459 bounds: gutter_bounds,
460 background: Some(self.style.gutter_background),
461 border: Border::new(0., Color::transparent_black()),
462 corner_radius: 0.,
463 });
464 scene.push_quad(Quad {
465 bounds: text_bounds,
466 background: Some(self.style.background),
467 border: Border::new(0., Color::transparent_black()),
468 corner_radius: 0.,
469 });
470
471 if let EditorMode::Full = layout.mode {
472 let mut active_rows = layout.active_rows.iter().peekable();
473 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
474 let mut end_row = *start_row;
475 while active_rows.peek().map_or(false, |r| {
476 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
477 }) {
478 active_rows.next().unwrap();
479 end_row += 1;
480 }
481
482 if !contains_non_empty_selection {
483 let origin = vec2f(
484 bounds.origin_x(),
485 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
486 - scroll_top,
487 );
488 let size = vec2f(
489 bounds.width(),
490 layout.position_map.line_height * (end_row - start_row + 1) as f32,
491 );
492 scene.push_quad(Quad {
493 bounds: RectF::new(origin, size),
494 background: Some(self.style.active_line_background),
495 border: Border::default(),
496 corner_radius: 0.,
497 });
498 }
499 }
500
501 if let Some(highlighted_rows) = &layout.highlighted_rows {
502 let origin = vec2f(
503 bounds.origin_x(),
504 bounds.origin_y()
505 + (layout.position_map.line_height * highlighted_rows.start as f32)
506 - scroll_top,
507 );
508 let size = vec2f(
509 bounds.width(),
510 layout.position_map.line_height * highlighted_rows.len() as f32,
511 );
512 scene.push_quad(Quad {
513 bounds: RectF::new(origin, size),
514 background: Some(self.style.highlighted_line_background),
515 border: Border::default(),
516 corner_radius: 0.,
517 });
518 }
519 }
520 }
521
522 fn paint_gutter(
523 &mut self,
524 scene: &mut SceneBuilder,
525 bounds: RectF,
526 visible_bounds: RectF,
527 layout: &mut LayoutState,
528 editor: &mut Editor,
529 cx: &mut ViewContext<Editor>,
530 ) {
531 let line_height = layout.position_map.line_height;
532
533 let scroll_position = layout.position_map.snapshot.scroll_position();
534 let scroll_top = scroll_position.y() * line_height;
535
536 let show_gutter = matches!(
537 &cx.global::<Settings>()
538 .git_overrides
539 .git_gutter
540 .unwrap_or_default(),
541 GitGutter::TrackedFiles
542 );
543
544 if show_gutter {
545 Self::paint_diff_hunks(scene, bounds, layout, cx);
546 }
547
548 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
549 if let Some(line) = line {
550 let line_origin = bounds.origin()
551 + vec2f(
552 bounds.width() - line.width() - layout.gutter_padding,
553 ix as f32 * line_height - (scroll_top % line_height),
554 );
555
556 line.paint(scene, line_origin, visible_bounds, line_height, cx);
557 }
558 }
559
560 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
561 if let Some(indicator) = fold_indicator.as_mut() {
562 let position = vec2f(
563 bounds.width() - layout.gutter_padding,
564 ix as f32 * line_height - (scroll_top % line_height),
565 );
566 let centering_offset = vec2f(
567 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
568 (line_height - indicator.size().y()) / 2.,
569 );
570
571 let indicator_origin = bounds.origin() + position + centering_offset;
572
573 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
574 }
575 }
576
577 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
578 let mut x = 0.;
579 let mut y = *row as f32 * line_height - scroll_top;
580 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
581 y += (line_height - indicator.size().y()) / 2.;
582 indicator.paint(
583 scene,
584 bounds.origin() + vec2f(x, y),
585 visible_bounds,
586 editor,
587 cx,
588 );
589 }
590 }
591
592 fn paint_diff_hunks(
593 scene: &mut SceneBuilder,
594 bounds: RectF,
595 layout: &mut LayoutState,
596 cx: &mut ViewContext<Editor>,
597 ) {
598 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
599 let line_height = layout.position_map.line_height;
600
601 let scroll_position = layout.position_map.snapshot.scroll_position();
602 let scroll_top = scroll_position.y() * line_height;
603
604 for hunk in &layout.display_hunks {
605 let (display_row_range, status) = match hunk {
606 //TODO: This rendering is entirely a horrible hack
607 &DisplayDiffHunk::Folded { display_row: row } => {
608 let start_y = row as f32 * line_height - scroll_top;
609 let end_y = start_y + line_height;
610
611 let width = diff_style.removed_width_em * line_height;
612 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
613 let highlight_size = vec2f(width * 2., end_y - start_y);
614 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
615
616 scene.push_quad(Quad {
617 bounds: highlight_bounds,
618 background: Some(diff_style.modified),
619 border: Border::new(0., Color::transparent_black()),
620 corner_radius: 1. * line_height,
621 });
622
623 continue;
624 }
625
626 DisplayDiffHunk::Unfolded {
627 display_row_range,
628 status,
629 } => (display_row_range, status),
630 };
631
632 let color = match status {
633 DiffHunkStatus::Added => diff_style.inserted,
634 DiffHunkStatus::Modified => diff_style.modified,
635
636 //TODO: This rendering is entirely a horrible hack
637 DiffHunkStatus::Removed => {
638 let row = *display_row_range.start();
639
640 let offset = line_height / 2.;
641 let start_y = row as f32 * line_height - offset - scroll_top;
642 let end_y = start_y + line_height;
643
644 let width = diff_style.removed_width_em * line_height;
645 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
646 let highlight_size = vec2f(width * 2., end_y - start_y);
647 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
648
649 scene.push_quad(Quad {
650 bounds: highlight_bounds,
651 background: Some(diff_style.deleted),
652 border: Border::new(0., Color::transparent_black()),
653 corner_radius: 1. * line_height,
654 });
655
656 continue;
657 }
658 };
659
660 let start_row = *display_row_range.start();
661 let end_row = *display_row_range.end();
662
663 let start_y = start_row as f32 * line_height - scroll_top;
664 let end_y = end_row as f32 * line_height - scroll_top + line_height;
665
666 let width = diff_style.width_em * line_height;
667 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
668 let highlight_size = vec2f(width * 2., end_y - start_y);
669 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
670
671 scene.push_quad(Quad {
672 bounds: highlight_bounds,
673 background: Some(color),
674 border: Border::new(0., Color::transparent_black()),
675 corner_radius: diff_style.corner_radius * line_height,
676 });
677 }
678 }
679
680 fn paint_text(
681 &mut self,
682 scene: &mut SceneBuilder,
683 bounds: RectF,
684 visible_bounds: RectF,
685 layout: &mut LayoutState,
686 editor: &mut Editor,
687 cx: &mut ViewContext<Editor>,
688 ) {
689 let style = &self.style;
690 let local_replica_id = editor.replica_id(cx);
691 let scroll_position = layout.position_map.snapshot.scroll_position();
692 let start_row = layout.visible_display_row_range.start;
693 let scroll_top = scroll_position.y() * layout.position_map.line_height;
694 let max_glyph_width = layout.position_map.em_width;
695 let scroll_left = scroll_position.x() * max_glyph_width;
696 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
697 let line_end_overshoot = 0.15 * layout.position_map.line_height;
698
699 scene.push_layer(Some(bounds));
700
701 scene.push_cursor_region(CursorRegion {
702 bounds,
703 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
704 CursorStyle::PointingHand
705 } else {
706 CursorStyle::IBeam
707 },
708 });
709
710 let fold_corner_radius =
711 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
712 for (id, range, color) in layout.fold_ranges.iter() {
713 self.paint_highlighted_range(
714 scene,
715 range.clone(),
716 *color,
717 fold_corner_radius,
718 fold_corner_radius * 2.,
719 layout,
720 content_origin,
721 scroll_top,
722 scroll_left,
723 bounds,
724 );
725
726 for bound in range_to_bounds(
727 &range,
728 content_origin,
729 scroll_left,
730 scroll_top,
731 &layout.visible_display_row_range,
732 line_end_overshoot,
733 &layout.position_map,
734 ) {
735 scene.push_cursor_region(CursorRegion {
736 bounds: bound,
737 style: CursorStyle::PointingHand,
738 });
739
740 let display_row = range.start.row();
741
742 let buffer_row = DisplayPoint::new(display_row, 0)
743 .to_point(&layout.position_map.snapshot.display_snapshot)
744 .row;
745
746 scene.push_mouse_region(
747 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
748 .on_click(MouseButton::Left, move |_, _: &mut Editor, cx| {
749 cx.dispatch_action(UnfoldAt { buffer_row })
750 })
751 .with_notify_on_hover(true)
752 .with_notify_on_click(true),
753 )
754 }
755 }
756
757 for (range, color) in &layout.highlighted_ranges {
758 self.paint_highlighted_range(
759 scene,
760 range.clone(),
761 *color,
762 0.,
763 line_end_overshoot,
764 layout,
765 content_origin,
766 scroll_top,
767 scroll_left,
768 bounds,
769 );
770 }
771
772 let mut cursors = SmallVec::<[Cursor; 32]>::new();
773 let corner_radius = 0.15 * layout.position_map.line_height;
774
775 for (replica_id, selections) in &layout.selections {
776 let selection_style = style.replica_selection_style(*replica_id);
777
778 for selection in selections {
779 self.paint_highlighted_range(
780 scene,
781 selection.range.clone(),
782 selection_style.selection,
783 corner_radius,
784 corner_radius * 2.,
785 layout,
786 content_origin,
787 scroll_top,
788 scroll_left,
789 bounds,
790 );
791
792 if editor.show_local_cursors(cx) || *replica_id != local_replica_id {
793 let cursor_position = selection.head;
794 if layout
795 .visible_display_row_range
796 .contains(&cursor_position.row())
797 {
798 let cursor_row_layout = &layout.position_map.line_layouts
799 [(cursor_position.row() - start_row) as usize];
800 let cursor_column = cursor_position.column() as usize;
801
802 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
803 let mut block_width =
804 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
805 if block_width == 0.0 {
806 block_width = layout.position_map.em_width;
807 }
808 let block_text = if let CursorShape::Block = selection.cursor_shape {
809 layout
810 .position_map
811 .snapshot
812 .chars_at(cursor_position)
813 .next()
814 .and_then(|(character, _)| {
815 let font_id =
816 cursor_row_layout.font_for_index(cursor_column)?;
817 let text = character.to_string();
818
819 Some(cx.text_layout_cache().layout_str(
820 &text,
821 cursor_row_layout.font_size(),
822 &[(
823 text.len(),
824 RunStyle {
825 font_id,
826 color: style.background,
827 underline: Default::default(),
828 },
829 )],
830 ))
831 })
832 } else {
833 None
834 };
835
836 let x = cursor_character_x - scroll_left;
837 let y = cursor_position.row() as f32 * layout.position_map.line_height
838 - scroll_top;
839 cursors.push(Cursor {
840 color: selection_style.cursor,
841 block_width,
842 origin: vec2f(x, y),
843 line_height: layout.position_map.line_height,
844 shape: selection.cursor_shape,
845 block_text,
846 });
847 }
848 }
849 }
850 }
851
852 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
853 // Draw glyphs
854 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
855 let row = start_row + ix as u32;
856 line.paint(
857 scene,
858 content_origin
859 + vec2f(
860 -scroll_left,
861 row as f32 * layout.position_map.line_height - scroll_top,
862 ),
863 visible_text_bounds,
864 layout.position_map.line_height,
865 cx,
866 );
867 }
868 }
869
870 scene.paint_layer(Some(bounds), |scene| {
871 for cursor in cursors {
872 cursor.paint(scene, content_origin, cx);
873 }
874 });
875
876 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
877 scene.push_stacking_context(None, None);
878 let cursor_row_layout =
879 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
880 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
881 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
882 let mut list_origin = content_origin + vec2f(x, y);
883 let list_width = context_menu.size().x();
884 let list_height = context_menu.size().y();
885
886 // Snap the right edge of the list to the right edge of the window if
887 // its horizontal bounds overflow.
888 if list_origin.x() + list_width > cx.window_size().x() {
889 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
890 }
891
892 if list_origin.y() + list_height > bounds.max_y() {
893 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
894 }
895
896 context_menu.paint(
897 scene,
898 list_origin,
899 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
900 editor,
901 cx,
902 );
903
904 scene.pop_stacking_context();
905 }
906
907 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
908 scene.push_stacking_context(None, None);
909
910 // This is safe because we check on layout whether the required row is available
911 let hovered_row_layout =
912 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
913
914 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
915 // height. This is the size we will use to decide whether to render popovers above or below
916 // the hovered line.
917 let first_size = hover_popovers[0].size();
918 let height_to_reserve = first_size.y()
919 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
920
921 // Compute Hovered Point
922 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
923 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
924 let hovered_point = content_origin + vec2f(x, y);
925
926 if hovered_point.y() - height_to_reserve > 0.0 {
927 // There is enough space above. Render popovers above the hovered point
928 let mut current_y = hovered_point.y();
929 for hover_popover in hover_popovers {
930 let size = hover_popover.size();
931 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
932
933 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
934 if x_out_of_bounds < 0.0 {
935 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
936 }
937
938 hover_popover.paint(
939 scene,
940 popover_origin,
941 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
942 editor,
943 cx,
944 );
945
946 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
947 }
948 } else {
949 // There is not enough space above. Render popovers below the hovered point
950 let mut current_y = hovered_point.y() + layout.position_map.line_height;
951 for hover_popover in hover_popovers {
952 let size = hover_popover.size();
953 let mut popover_origin = vec2f(hovered_point.x(), current_y);
954
955 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
956 if x_out_of_bounds < 0.0 {
957 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
958 }
959
960 hover_popover.paint(
961 scene,
962 popover_origin,
963 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
964 editor,
965 cx,
966 );
967
968 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
969 }
970 }
971
972 scene.pop_stacking_context();
973 }
974
975 scene.pop_layer();
976 }
977
978 fn paint_scrollbar(
979 &mut self,
980 scene: &mut SceneBuilder,
981 bounds: RectF,
982 layout: &mut LayoutState,
983 cx: &mut ViewContext<Editor>,
984 ) {
985 enum ScrollbarMouseHandlers {}
986 if layout.mode != EditorMode::Full {
987 return;
988 }
989
990 let style = &self.style.theme.scrollbar;
991
992 let top = bounds.min_y();
993 let bottom = bounds.max_y();
994 let right = bounds.max_x();
995 let left = right - style.width;
996 let row_range = &layout.scrollbar_row_range;
997 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
998
999 let mut height = bounds.height();
1000 let mut first_row_y_offset = 0.0;
1001
1002 // Impose a minimum height on the scrollbar thumb
1003 let min_thumb_height =
1004 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1005 let thumb_height = (row_range.end - row_range.start) * height / max_row;
1006 if thumb_height < min_thumb_height {
1007 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1008 height -= min_thumb_height - thumb_height;
1009 }
1010
1011 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1012
1013 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1014 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1015 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1016 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1017
1018 if layout.show_scrollbars {
1019 scene.push_quad(Quad {
1020 bounds: track_bounds,
1021 border: style.track.border,
1022 background: style.track.background_color,
1023 ..Default::default()
1024 });
1025 scene.push_quad(Quad {
1026 bounds: thumb_bounds,
1027 border: style.thumb.border,
1028 background: style.thumb.background_color,
1029 corner_radius: style.thumb.corner_radius,
1030 });
1031 }
1032
1033 scene.push_cursor_region(CursorRegion {
1034 bounds: track_bounds,
1035 style: CursorStyle::Arrow,
1036 });
1037 scene.push_mouse_region(
1038 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1039 .on_move(move |_, editor: &mut Editor, cx| {
1040 editor.scroll_manager.show_scrollbar(cx);
1041 })
1042 .on_down(MouseButton::Left, {
1043 let row_range = row_range.clone();
1044 move |event, editor: &mut Editor, cx| {
1045 let y = event.position.y();
1046 if y < thumb_top || thumb_bottom < y {
1047 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1048 let top_row = center_row
1049 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1050 let mut position = editor.scroll_position(cx);
1051 position.set_y(top_row as f32);
1052 editor.set_scroll_position(position, cx);
1053 } else {
1054 editor.scroll_manager.show_scrollbar(cx);
1055 }
1056 }
1057 })
1058 .on_drag(MouseButton::Left, {
1059 move |event, editor: &mut Editor, cx| {
1060 let y = event.prev_mouse_position.y();
1061 let new_y = event.position.y();
1062 if thumb_top < y && y < thumb_bottom {
1063 let mut position = editor.scroll_position(cx);
1064 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1065 if position.y() < 0.0 {
1066 position.set_y(0.);
1067 }
1068 editor.set_scroll_position(position, cx);
1069 }
1070 }
1071 }),
1072 );
1073 }
1074
1075 #[allow(clippy::too_many_arguments)]
1076 fn paint_highlighted_range(
1077 &self,
1078 scene: &mut SceneBuilder,
1079 range: Range<DisplayPoint>,
1080 color: Color,
1081 corner_radius: f32,
1082 line_end_overshoot: f32,
1083 layout: &LayoutState,
1084 content_origin: Vector2F,
1085 scroll_top: f32,
1086 scroll_left: f32,
1087 bounds: RectF,
1088 ) {
1089 let start_row = layout.visible_display_row_range.start;
1090 let end_row = layout.visible_display_row_range.end;
1091 if range.start != range.end {
1092 let row_range = if range.end.column() == 0 {
1093 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1094 } else {
1095 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1096 };
1097
1098 let highlighted_range = HighlightedRange {
1099 color,
1100 line_height: layout.position_map.line_height,
1101 corner_radius,
1102 start_y: content_origin.y()
1103 + row_range.start as f32 * layout.position_map.line_height
1104 - scroll_top,
1105 lines: row_range
1106 .into_iter()
1107 .map(|row| {
1108 let line_layout =
1109 &layout.position_map.line_layouts[(row - start_row) as usize];
1110 HighlightedRangeLine {
1111 start_x: if row == range.start.row() {
1112 content_origin.x()
1113 + line_layout.x_for_index(range.start.column() as usize)
1114 - scroll_left
1115 } else {
1116 content_origin.x() - scroll_left
1117 },
1118 end_x: if row == range.end.row() {
1119 content_origin.x()
1120 + line_layout.x_for_index(range.end.column() as usize)
1121 - scroll_left
1122 } else {
1123 content_origin.x() + line_layout.width() + line_end_overshoot
1124 - scroll_left
1125 },
1126 }
1127 })
1128 .collect(),
1129 };
1130
1131 highlighted_range.paint(bounds, scene);
1132 }
1133 }
1134
1135 fn paint_blocks(
1136 &mut self,
1137 scene: &mut SceneBuilder,
1138 bounds: RectF,
1139 visible_bounds: RectF,
1140 layout: &mut LayoutState,
1141 editor: &mut Editor,
1142 cx: &mut ViewContext<Editor>,
1143 ) {
1144 let scroll_position = layout.position_map.snapshot.scroll_position();
1145 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1146 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1147
1148 for block in &mut layout.blocks {
1149 let mut origin = bounds.origin()
1150 + vec2f(
1151 0.,
1152 block.row as f32 * layout.position_map.line_height - scroll_top,
1153 );
1154 if !matches!(block.style, BlockStyle::Sticky) {
1155 origin += vec2f(-scroll_left, 0.);
1156 }
1157 block
1158 .element
1159 .paint(scene, origin, visible_bounds, editor, cx);
1160 }
1161 }
1162
1163 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1164 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1165 let style = &self.style;
1166
1167 cx.text_layout_cache()
1168 .layout_str(
1169 "1".repeat(digit_count).as_str(),
1170 style.text.font_size,
1171 &[(
1172 digit_count,
1173 RunStyle {
1174 font_id: style.text.font_id,
1175 color: Color::black(),
1176 underline: Default::default(),
1177 },
1178 )],
1179 )
1180 .width()
1181 }
1182
1183 //Folds contained in a hunk are ignored apart from shrinking visual size
1184 //If a fold contains any hunks then that fold line is marked as modified
1185 fn layout_git_gutters(
1186 &self,
1187 display_rows: Range<u32>,
1188 snapshot: &EditorSnapshot,
1189 ) -> Vec<DisplayDiffHunk> {
1190 let buffer_snapshot = &snapshot.buffer_snapshot;
1191
1192 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1193 .to_point(snapshot)
1194 .row;
1195 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1196 .to_point(snapshot)
1197 .row;
1198
1199 buffer_snapshot
1200 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1201 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1202 .dedup()
1203 .collect()
1204 }
1205
1206 fn layout_line_numbers(
1207 &self,
1208 rows: Range<u32>,
1209 active_rows: &BTreeMap<u32, bool>,
1210 is_singleton: bool,
1211 snapshot: &EditorSnapshot,
1212 cx: &ViewContext<Editor>,
1213 ) -> (
1214 Vec<Option<text_layout::Line>>,
1215 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1216 ) {
1217 let style = &self.style;
1218 let include_line_numbers = snapshot.mode == EditorMode::Full;
1219 let mut line_number_layouts = Vec::with_capacity(rows.len());
1220 let mut fold_statuses = Vec::with_capacity(rows.len());
1221 let mut line_number = String::new();
1222 for (ix, row) in snapshot
1223 .buffer_rows(rows.start)
1224 .take((rows.end - rows.start) as usize)
1225 .enumerate()
1226 {
1227 let display_row = rows.start + ix as u32;
1228 let (active, color) = if active_rows.contains_key(&display_row) {
1229 (true, style.line_number_active)
1230 } else {
1231 (false, style.line_number)
1232 };
1233 if let Some(buffer_row) = row {
1234 if include_line_numbers {
1235 line_number.clear();
1236 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1237 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1238 &line_number,
1239 style.text.font_size,
1240 &[(
1241 line_number.len(),
1242 RunStyle {
1243 font_id: style.text.font_id,
1244 color,
1245 underline: Default::default(),
1246 },
1247 )],
1248 )));
1249 fold_statuses.push(
1250 is_singleton
1251 .then(|| {
1252 snapshot
1253 .fold_for_line(buffer_row)
1254 .map(|fold_status| (fold_status, buffer_row, active))
1255 })
1256 .flatten(),
1257 )
1258 }
1259 } else {
1260 fold_statuses.push(None);
1261 line_number_layouts.push(None);
1262 }
1263 }
1264
1265 (line_number_layouts, fold_statuses)
1266 }
1267
1268 fn layout_lines(
1269 &mut self,
1270 rows: Range<u32>,
1271 snapshot: &EditorSnapshot,
1272 cx: &ViewContext<Editor>,
1273 ) -> Vec<text_layout::Line> {
1274 if rows.start >= rows.end {
1275 return Vec::new();
1276 }
1277
1278 // When the editor is empty and unfocused, then show the placeholder.
1279 if snapshot.is_empty() {
1280 let placeholder_style = self
1281 .style
1282 .placeholder_text
1283 .as_ref()
1284 .unwrap_or(&self.style.text);
1285 let placeholder_text = snapshot.placeholder_text();
1286 let placeholder_lines = placeholder_text
1287 .as_ref()
1288 .map_or("", AsRef::as_ref)
1289 .split('\n')
1290 .skip(rows.start as usize)
1291 .chain(iter::repeat(""))
1292 .take(rows.len());
1293 placeholder_lines
1294 .map(|line| {
1295 cx.text_layout_cache().layout_str(
1296 line,
1297 placeholder_style.font_size,
1298 &[(
1299 line.len(),
1300 RunStyle {
1301 font_id: placeholder_style.font_id,
1302 color: placeholder_style.color,
1303 underline: Default::default(),
1304 },
1305 )],
1306 )
1307 })
1308 .collect()
1309 } else {
1310 let style = &self.style;
1311 let chunks = snapshot
1312 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1313 .map(|chunk| {
1314 let mut highlight_style = chunk
1315 .syntax_highlight_id
1316 .and_then(|id| id.style(&style.syntax));
1317
1318 if let Some(chunk_highlight) = chunk.highlight_style {
1319 if let Some(highlight_style) = highlight_style.as_mut() {
1320 highlight_style.highlight(chunk_highlight);
1321 } else {
1322 highlight_style = Some(chunk_highlight);
1323 }
1324 }
1325
1326 let mut diagnostic_highlight = HighlightStyle::default();
1327
1328 if chunk.is_unnecessary {
1329 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1330 }
1331
1332 if let Some(severity) = chunk.diagnostic_severity {
1333 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1334 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1335 let diagnostic_style = super::diagnostic_style(severity, true, style);
1336 diagnostic_highlight.underline = Some(Underline {
1337 color: Some(diagnostic_style.message.text.color),
1338 thickness: 1.0.into(),
1339 squiggly: true,
1340 });
1341 }
1342 }
1343
1344 if let Some(highlight_style) = highlight_style.as_mut() {
1345 highlight_style.highlight(diagnostic_highlight);
1346 } else {
1347 highlight_style = Some(diagnostic_highlight);
1348 }
1349
1350 (chunk.text, highlight_style)
1351 });
1352 layout_highlighted_chunks(
1353 chunks,
1354 &style.text,
1355 cx.text_layout_cache(),
1356 cx.font_cache(),
1357 MAX_LINE_LEN,
1358 rows.len() as usize,
1359 )
1360 }
1361 }
1362
1363 #[allow(clippy::too_many_arguments)]
1364 fn layout_blocks(
1365 &mut self,
1366 rows: Range<u32>,
1367 snapshot: &EditorSnapshot,
1368 editor_width: f32,
1369 scroll_width: f32,
1370 gutter_padding: f32,
1371 gutter_width: f32,
1372 em_width: f32,
1373 text_x: f32,
1374 line_height: f32,
1375 style: &EditorStyle,
1376 line_layouts: &[text_layout::Line],
1377 include_root: bool,
1378 editor: &mut Editor,
1379 cx: &mut ViewContext<Editor>,
1380 ) -> (f32, Vec<BlockLayout>) {
1381 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1382 let scroll_x = snapshot.scroll_anchor.offset.x();
1383 let (fixed_blocks, non_fixed_blocks) = snapshot
1384 .blocks_in_range(rows.clone())
1385 .partition::<Vec<_>, _>(|(_, block)| match block {
1386 TransformBlock::ExcerptHeader { .. } => false,
1387 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1388 });
1389 let mut render_block = |block: &TransformBlock, width: f32| {
1390 let mut element = match block {
1391 TransformBlock::Custom(block) => {
1392 let align_to = block
1393 .position()
1394 .to_point(&snapshot.buffer_snapshot)
1395 .to_display_point(snapshot);
1396 let anchor_x = text_x
1397 + if rows.contains(&align_to.row()) {
1398 line_layouts[(align_to.row() - rows.start) as usize]
1399 .x_for_index(align_to.column() as usize)
1400 } else {
1401 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1402 .x_for_index(align_to.column() as usize)
1403 };
1404
1405 block.render(&mut BlockContext {
1406 view_context: cx,
1407 anchor_x,
1408 gutter_padding,
1409 line_height,
1410 scroll_x,
1411 gutter_width,
1412 em_width,
1413 })
1414 }
1415 TransformBlock::ExcerptHeader {
1416 id,
1417 buffer,
1418 range,
1419 starts_new_buffer,
1420 ..
1421 } => {
1422 let id = *id;
1423 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1424 let jump_position = range
1425 .primary
1426 .as_ref()
1427 .map_or(range.context.start, |primary| primary.start);
1428 let jump_action = crate::Jump {
1429 path: ProjectPath {
1430 worktree_id: file.worktree_id(cx),
1431 path: file.path.clone(),
1432 },
1433 position: language::ToPoint::to_point(&jump_position, buffer),
1434 anchor: jump_position,
1435 };
1436
1437 enum JumpIcon {}
1438 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
1439 let style = style.jump_icon.style_for(state, false);
1440 Svg::new("icons/arrow_up_right_8.svg")
1441 .with_color(style.color)
1442 .constrained()
1443 .with_width(style.icon_width)
1444 .aligned()
1445 .contained()
1446 .with_style(style.container)
1447 .constrained()
1448 .with_width(style.button_width)
1449 .with_height(style.button_width)
1450 })
1451 .with_cursor_style(CursorStyle::PointingHand)
1452 .on_click(MouseButton::Left, move |_, _, cx| {
1453 cx.dispatch_action(jump_action.clone())
1454 })
1455 .with_tooltip::<JumpIcon>(
1456 id.into(),
1457 "Jump to Buffer".to_string(),
1458 Some(Box::new(crate::OpenExcerpts)),
1459 tooltip_style.clone(),
1460 cx,
1461 )
1462 .aligned()
1463 .flex_float()
1464 });
1465
1466 if *starts_new_buffer {
1467 let style = &self.style.diagnostic_path_header;
1468 let font_size =
1469 (style.text_scale_factor * self.style.text.font_size).round();
1470
1471 let path = buffer.resolve_file_path(cx, include_root);
1472 let mut filename = None;
1473 let mut parent_path = None;
1474 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1475 if let Some(path) = path {
1476 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1477 parent_path =
1478 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1479 }
1480
1481 Flex::row()
1482 .with_child(
1483 Label::new(
1484 filename.unwrap_or_else(|| "untitled".to_string()),
1485 style.filename.text.clone().with_font_size(font_size),
1486 )
1487 .contained()
1488 .with_style(style.filename.container)
1489 .aligned(),
1490 )
1491 .with_children(parent_path.map(|path| {
1492 Label::new(path, style.path.text.clone().with_font_size(font_size))
1493 .contained()
1494 .with_style(style.path.container)
1495 .aligned()
1496 }))
1497 .with_children(jump_icon)
1498 .contained()
1499 .with_style(style.container)
1500 .with_padding_left(gutter_padding)
1501 .with_padding_right(gutter_padding)
1502 .expanded()
1503 .into_any_named("path header block")
1504 } else {
1505 let text_style = self.style.text.clone();
1506 Flex::row()
1507 .with_child(Label::new("⋯", text_style))
1508 .with_children(jump_icon)
1509 .contained()
1510 .with_padding_left(gutter_padding)
1511 .with_padding_right(gutter_padding)
1512 .expanded()
1513 .into_any_named("collapsed context")
1514 }
1515 }
1516 };
1517
1518 element.layout(
1519 SizeConstraint {
1520 min: Vector2F::zero(),
1521 max: vec2f(width, block.height() as f32 * line_height),
1522 },
1523 editor,
1524 cx,
1525 );
1526 element
1527 };
1528
1529 let mut fixed_block_max_width = 0f32;
1530 let mut blocks = Vec::new();
1531 for (row, block) in fixed_blocks {
1532 let element = render_block(block, f32::INFINITY);
1533 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1534 blocks.push(BlockLayout {
1535 row,
1536 element,
1537 style: BlockStyle::Fixed,
1538 });
1539 }
1540 for (row, block) in non_fixed_blocks {
1541 let style = match block {
1542 TransformBlock::Custom(block) => block.style(),
1543 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1544 };
1545 let width = match style {
1546 BlockStyle::Sticky => editor_width,
1547 BlockStyle::Flex => editor_width
1548 .max(fixed_block_max_width)
1549 .max(gutter_width + scroll_width),
1550 BlockStyle::Fixed => unreachable!(),
1551 };
1552 let element = render_block(block, width);
1553 blocks.push(BlockLayout {
1554 row,
1555 element,
1556 style,
1557 });
1558 }
1559 (
1560 scroll_width.max(fixed_block_max_width - gutter_width),
1561 blocks,
1562 )
1563 }
1564}
1565
1566impl Element<Editor> for EditorElement {
1567 type LayoutState = LayoutState;
1568 type PaintState = ();
1569
1570 fn layout(
1571 &mut self,
1572 constraint: SizeConstraint,
1573 editor: &mut Editor,
1574 cx: &mut ViewContext<Editor>,
1575 ) -> (Vector2F, Self::LayoutState) {
1576 let mut size = constraint.max;
1577 if size.x().is_infinite() {
1578 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1579 }
1580
1581 let snapshot = editor.snapshot(cx);
1582 let style = self.style.clone();
1583 let line_height = style.text.line_height(cx.font_cache());
1584
1585 let gutter_padding;
1586 let gutter_width;
1587 let gutter_margin;
1588 if snapshot.mode == EditorMode::Full {
1589 gutter_padding = style.text.em_width(cx.font_cache()) * style.gutter_padding_factor;
1590 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1591 gutter_margin = -style.text.descent(cx.font_cache());
1592 } else {
1593 gutter_padding = 0.0;
1594 gutter_width = 0.0;
1595 gutter_margin = 0.0;
1596 };
1597
1598 let text_width = size.x() - gutter_width;
1599 let em_width = style.text.em_width(cx.font_cache());
1600 let em_advance = style.text.em_advance(cx.font_cache());
1601 let overscroll = vec2f(em_width, 0.);
1602 let snapshot = {
1603 editor.set_visible_line_count(size.y() / line_height);
1604
1605 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1606 let wrap_width = match editor.soft_wrap_mode(cx) {
1607 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1608 SoftWrap::EditorWidth => editor_width,
1609 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1610 };
1611
1612 if editor.set_wrap_width(Some(wrap_width), cx) {
1613 editor.snapshot(cx)
1614 } else {
1615 snapshot
1616 }
1617 };
1618
1619 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1620 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1621 size.set_y(
1622 scroll_height
1623 .min(constraint.max_along(Axis::Vertical))
1624 .max(constraint.min_along(Axis::Vertical))
1625 .min(line_height * max_lines as f32),
1626 )
1627 } else if let EditorMode::SingleLine = snapshot.mode {
1628 size.set_y(
1629 line_height
1630 .min(constraint.max_along(Axis::Vertical))
1631 .max(constraint.min_along(Axis::Vertical)),
1632 )
1633 } else if size.y().is_infinite() {
1634 size.set_y(scroll_height);
1635 }
1636 let gutter_size = vec2f(gutter_width, size.y());
1637 let text_size = vec2f(text_width, size.y());
1638
1639 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1640 let mut snapshot = editor.snapshot(cx);
1641
1642 let scroll_position = snapshot.scroll_position();
1643 // The scroll position is a fractional point, the whole number of which represents
1644 // the top of the window in terms of display rows.
1645 let start_row = scroll_position.y() as u32;
1646 let height_in_lines = size.y() / line_height;
1647 let max_row = snapshot.max_point().row();
1648
1649 // Add 1 to ensure selections bleed off screen
1650 let end_row = 1 + cmp::min(
1651 (scroll_position.y() + height_in_lines).ceil() as u32,
1652 max_row,
1653 );
1654
1655 let start_anchor = if start_row == 0 {
1656 Anchor::min()
1657 } else {
1658 snapshot
1659 .buffer_snapshot
1660 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1661 };
1662 let end_anchor = if end_row > max_row {
1663 Anchor::max()
1664 } else {
1665 snapshot
1666 .buffer_snapshot
1667 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1668 };
1669
1670 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1671 let mut active_rows = BTreeMap::new();
1672 let mut fold_ranges = Vec::new();
1673 let is_singleton = editor.is_singleton(cx);
1674
1675 let highlighted_rows = editor.highlighted_rows();
1676 let theme = cx.global::<Settings>().theme.as_ref();
1677 let highlighted_ranges = editor.background_highlights_in_range(
1678 start_anchor..end_anchor,
1679 &snapshot.display_snapshot,
1680 theme,
1681 );
1682
1683 fold_ranges.extend(
1684 snapshot
1685 .folds_in_range(start_anchor..end_anchor)
1686 .map(|anchor| {
1687 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1688 (
1689 start.row,
1690 start.to_display_point(&snapshot.display_snapshot)
1691 ..anchor.end.to_display_point(&snapshot),
1692 )
1693 }),
1694 );
1695
1696 let mut remote_selections = HashMap::default();
1697 for (replica_id, line_mode, cursor_shape, selection) in snapshot
1698 .buffer_snapshot
1699 .remote_selections_in_range(&(start_anchor..end_anchor))
1700 {
1701 // The local selections match the leader's selections.
1702 if Some(replica_id) == editor.leader_replica_id {
1703 continue;
1704 }
1705 remote_selections
1706 .entry(replica_id)
1707 .or_insert(Vec::new())
1708 .push(SelectionLayout::new(
1709 selection,
1710 line_mode,
1711 cursor_shape,
1712 &snapshot.display_snapshot,
1713 ));
1714 }
1715 selections.extend(remote_selections);
1716
1717 if editor.show_local_selections {
1718 let mut local_selections = editor
1719 .selections
1720 .disjoint_in_range(start_anchor..end_anchor, cx);
1721 local_selections.extend(editor.selections.pending(cx));
1722 for selection in &local_selections {
1723 let is_empty = selection.start == selection.end;
1724 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1725 let selection_end = snapshot.next_line_boundary(selection.end).1;
1726 for row in cmp::max(selection_start.row(), start_row)
1727 ..=cmp::min(selection_end.row(), end_row)
1728 {
1729 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1730 *contains_non_empty_selection |= !is_empty;
1731 }
1732 }
1733
1734 // Render the local selections in the leader's color when following.
1735 let local_replica_id = editor
1736 .leader_replica_id
1737 .unwrap_or_else(|| editor.replica_id(cx));
1738
1739 selections.push((
1740 local_replica_id,
1741 local_selections
1742 .into_iter()
1743 .map(|selection| {
1744 SelectionLayout::new(
1745 selection,
1746 editor.selections.line_mode,
1747 editor.cursor_shape,
1748 &snapshot.display_snapshot,
1749 )
1750 })
1751 .collect(),
1752 ));
1753 }
1754
1755 let show_scrollbars = editor.scroll_manager.scrollbars_visible();
1756 let include_root = editor
1757 .project
1758 .as_ref()
1759 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1760 .unwrap_or_default();
1761
1762 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1763 .into_iter()
1764 .map(|(id, fold)| {
1765 let color = self
1766 .style
1767 .folds
1768 .ellipses
1769 .background
1770 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1771 .color;
1772
1773 (id, fold, color)
1774 })
1775 .collect();
1776
1777 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
1778 start_row..end_row,
1779 &active_rows,
1780 is_singleton,
1781 &snapshot,
1782 cx,
1783 );
1784
1785 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1786
1787 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1788
1789 let mut max_visible_line_width = 0.0;
1790 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1791 for line in &line_layouts {
1792 if line.width() > max_visible_line_width {
1793 max_visible_line_width = line.width();
1794 }
1795 }
1796
1797 let style = self.style.clone();
1798 let longest_line_width = layout_line(
1799 snapshot.longest_row(),
1800 &snapshot,
1801 &style,
1802 cx.text_layout_cache(),
1803 )
1804 .width();
1805 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1806 let em_width = style.text.em_width(cx.font_cache());
1807 let (scroll_width, blocks) = self.layout_blocks(
1808 start_row..end_row,
1809 &snapshot,
1810 size.x(),
1811 scroll_width,
1812 gutter_padding,
1813 gutter_width,
1814 em_width,
1815 gutter_width + gutter_margin,
1816 line_height,
1817 &style,
1818 &line_layouts,
1819 include_root,
1820 editor,
1821 cx,
1822 );
1823
1824 let scroll_max = vec2f(
1825 ((scroll_width - text_size.x()) / em_width).max(0.0),
1826 max_row as f32,
1827 );
1828
1829 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
1830
1831 let autoscrolled = if autoscroll_horizontally {
1832 editor.autoscroll_horizontally(
1833 start_row,
1834 text_size.x(),
1835 scroll_width,
1836 em_width,
1837 &line_layouts,
1838 cx,
1839 )
1840 } else {
1841 false
1842 };
1843
1844 if clamped || autoscrolled {
1845 snapshot = editor.snapshot(cx);
1846 }
1847
1848 let newest_selection_head = editor
1849 .selections
1850 .newest::<usize>(cx)
1851 .head()
1852 .to_display_point(&snapshot);
1853 let style = editor.style(cx);
1854
1855 let mut context_menu = None;
1856 let mut code_actions_indicator = None;
1857 if (start_row..end_row).contains(&newest_selection_head.row()) {
1858 if editor.context_menu_visible() {
1859 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
1860 }
1861
1862 let active = matches!(
1863 editor.context_menu,
1864 Some(crate::ContextMenu::CodeActions(_))
1865 );
1866
1867 code_actions_indicator = editor
1868 .render_code_actions_indicator(&style, active, cx)
1869 .map(|indicator| (newest_selection_head.row(), indicator));
1870 }
1871
1872 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1873 let mut hover = editor
1874 .hover_state
1875 .render(&snapshot, &style, visible_rows, cx);
1876 let mode = editor.mode;
1877
1878 let mut fold_indicators = editor.render_fold_indicators(
1879 fold_statuses,
1880 &style,
1881 editor.gutter_hovered,
1882 line_height,
1883 gutter_margin,
1884 cx,
1885 );
1886
1887 if let Some((_, context_menu)) = context_menu.as_mut() {
1888 context_menu.layout(
1889 SizeConstraint {
1890 min: Vector2F::zero(),
1891 max: vec2f(
1892 cx.window_size().x() * 0.7,
1893 (12. * line_height).min((size.y() - line_height) / 2.),
1894 ),
1895 },
1896 editor,
1897 cx,
1898 );
1899 }
1900
1901 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1902 indicator.layout(
1903 SizeConstraint::strict_along(
1904 Axis::Vertical,
1905 line_height * style.code_actions.vertical_scale,
1906 ),
1907 editor,
1908 cx,
1909 );
1910 }
1911
1912 for fold_indicator in fold_indicators.iter_mut() {
1913 if let Some(indicator) = fold_indicator.as_mut() {
1914 indicator.layout(
1915 SizeConstraint::strict_along(
1916 Axis::Vertical,
1917 line_height * style.code_actions.vertical_scale,
1918 ),
1919 editor,
1920 cx,
1921 );
1922 }
1923 }
1924
1925 if let Some((_, hover_popovers)) = hover.as_mut() {
1926 for hover_popover in hover_popovers.iter_mut() {
1927 hover_popover.layout(
1928 SizeConstraint {
1929 min: Vector2F::zero(),
1930 max: vec2f(
1931 (120. * em_width) // Default size
1932 .min(size.x() / 2.) // Shrink to half of the editor width
1933 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1934 (16. * line_height) // Default size
1935 .min(size.y() / 2.) // Shrink to half of the editor height
1936 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1937 ),
1938 },
1939 editor,
1940 cx,
1941 );
1942 }
1943 }
1944
1945 (
1946 size,
1947 LayoutState {
1948 mode,
1949 position_map: Arc::new(PositionMap {
1950 size,
1951 scroll_max,
1952 line_layouts,
1953 line_height,
1954 em_width,
1955 em_advance,
1956 snapshot,
1957 }),
1958 visible_display_row_range: start_row..end_row,
1959 gutter_size,
1960 gutter_padding,
1961 text_size,
1962 scrollbar_row_range,
1963 show_scrollbars,
1964 max_row,
1965 gutter_margin,
1966 active_rows,
1967 highlighted_rows,
1968 highlighted_ranges,
1969 fold_ranges,
1970 line_number_layouts,
1971 display_hunks,
1972 blocks,
1973 selections,
1974 context_menu,
1975 code_actions_indicator,
1976 fold_indicators,
1977 hover_popovers: hover,
1978 },
1979 )
1980 }
1981
1982 fn paint(
1983 &mut self,
1984 scene: &mut SceneBuilder,
1985 bounds: RectF,
1986 visible_bounds: RectF,
1987 layout: &mut Self::LayoutState,
1988 editor: &mut Editor,
1989 cx: &mut ViewContext<Editor>,
1990 ) -> Self::PaintState {
1991 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
1992 scene.push_layer(Some(visible_bounds));
1993
1994 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1995 let text_bounds = RectF::new(
1996 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1997 layout.text_size,
1998 );
1999
2000 Self::attach_mouse_handlers(
2001 scene,
2002 &layout.position_map,
2003 layout.hover_popovers.is_some(),
2004 visible_bounds,
2005 text_bounds,
2006 gutter_bounds,
2007 bounds,
2008 cx,
2009 );
2010
2011 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2012 if layout.gutter_size.x() > 0. {
2013 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2014 }
2015 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2016
2017 scene.push_layer(Some(bounds));
2018 if !layout.blocks.is_empty() {
2019 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2020 }
2021 self.paint_scrollbar(scene, bounds, layout, cx);
2022 scene.pop_layer();
2023
2024 scene.pop_layer();
2025 }
2026
2027 fn rect_for_text_range(
2028 &self,
2029 range_utf16: Range<usize>,
2030 bounds: RectF,
2031 _: RectF,
2032 layout: &Self::LayoutState,
2033 _: &Self::PaintState,
2034 _: &Editor,
2035 _: &ViewContext<Editor>,
2036 ) -> Option<RectF> {
2037 let text_bounds = RectF::new(
2038 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2039 layout.text_size,
2040 );
2041 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2042 let scroll_position = layout.position_map.snapshot.scroll_position();
2043 let start_row = scroll_position.y() as u32;
2044 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2045 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2046
2047 let range_start = OffsetUtf16(range_utf16.start)
2048 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2049 if range_start.row() < start_row {
2050 return None;
2051 }
2052
2053 let line = layout
2054 .position_map
2055 .line_layouts
2056 .get((range_start.row() - start_row) as usize)?;
2057 let range_start_x = line.x_for_index(range_start.column() as usize);
2058 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2059 Some(RectF::new(
2060 content_origin
2061 + vec2f(
2062 range_start_x,
2063 range_start_y + layout.position_map.line_height,
2064 )
2065 - vec2f(scroll_left, scroll_top),
2066 vec2f(
2067 layout.position_map.em_width,
2068 layout.position_map.line_height,
2069 ),
2070 ))
2071 }
2072
2073 fn debug(
2074 &self,
2075 bounds: RectF,
2076 _: &Self::LayoutState,
2077 _: &Self::PaintState,
2078 _: &Editor,
2079 _: &ViewContext<Editor>,
2080 ) -> json::Value {
2081 json!({
2082 "type": "BufferElement",
2083 "bounds": bounds.to_json()
2084 })
2085 }
2086}
2087
2088type BufferRow = u32;
2089
2090pub struct LayoutState {
2091 position_map: Arc<PositionMap>,
2092 gutter_size: Vector2F,
2093 gutter_padding: f32,
2094 gutter_margin: f32,
2095 text_size: Vector2F,
2096 mode: EditorMode,
2097 visible_display_row_range: Range<u32>,
2098 active_rows: BTreeMap<u32, bool>,
2099 highlighted_rows: Option<Range<u32>>,
2100 line_number_layouts: Vec<Option<text_layout::Line>>,
2101 display_hunks: Vec<DisplayDiffHunk>,
2102 blocks: Vec<BlockLayout>,
2103 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2104 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2105 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2106 scrollbar_row_range: Range<f32>,
2107 show_scrollbars: bool,
2108 max_row: u32,
2109 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2110 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2111 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2112 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2113}
2114
2115pub struct PositionMap {
2116 size: Vector2F,
2117 line_height: f32,
2118 scroll_max: Vector2F,
2119 em_width: f32,
2120 em_advance: f32,
2121 line_layouts: Vec<text_layout::Line>,
2122 snapshot: EditorSnapshot,
2123}
2124
2125impl PositionMap {
2126 /// Returns two display points:
2127 /// 1. The nearest *valid* position in the editor
2128 /// 2. An unclipped, potentially *invalid* position that maps directly to
2129 /// the given pixel position.
2130 fn point_for_position(
2131 &self,
2132 text_bounds: RectF,
2133 position: Vector2F,
2134 ) -> (DisplayPoint, DisplayPoint) {
2135 let scroll_position = self.snapshot.scroll_position();
2136 let position = position - text_bounds.origin();
2137 let y = position.y().max(0.0).min(self.size.y());
2138 let x = position.x() + (scroll_position.x() * self.em_width);
2139 let row = (y / self.line_height + scroll_position.y()) as u32;
2140 let (column, x_overshoot) = if let Some(line) = self
2141 .line_layouts
2142 .get(row as usize - scroll_position.y() as usize)
2143 {
2144 if let Some(ix) = line.index_for_x(x) {
2145 (ix as u32, 0.0)
2146 } else {
2147 (line.len() as u32, 0f32.max(x - line.width()))
2148 }
2149 } else {
2150 (0, x)
2151 };
2152
2153 let mut target_point = DisplayPoint::new(row, column);
2154 let point = self.snapshot.clip_point(target_point, Bias::Left);
2155 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2156
2157 (point, target_point)
2158 }
2159}
2160
2161struct BlockLayout {
2162 row: u32,
2163 element: AnyElement<Editor>,
2164 style: BlockStyle,
2165}
2166
2167fn layout_line(
2168 row: u32,
2169 snapshot: &EditorSnapshot,
2170 style: &EditorStyle,
2171 layout_cache: &TextLayoutCache,
2172) -> text_layout::Line {
2173 let mut line = snapshot.line(row);
2174
2175 if line.len() > MAX_LINE_LEN {
2176 let mut len = MAX_LINE_LEN;
2177 while !line.is_char_boundary(len) {
2178 len -= 1;
2179 }
2180
2181 line.truncate(len);
2182 }
2183
2184 layout_cache.layout_str(
2185 &line,
2186 style.text.font_size,
2187 &[(
2188 snapshot.line_len(row) as usize,
2189 RunStyle {
2190 font_id: style.text.font_id,
2191 color: Color::black(),
2192 underline: Default::default(),
2193 },
2194 )],
2195 )
2196}
2197
2198#[derive(Debug)]
2199pub struct Cursor {
2200 origin: Vector2F,
2201 block_width: f32,
2202 line_height: f32,
2203 color: Color,
2204 shape: CursorShape,
2205 block_text: Option<Line>,
2206}
2207
2208impl Cursor {
2209 pub fn new(
2210 origin: Vector2F,
2211 block_width: f32,
2212 line_height: f32,
2213 color: Color,
2214 shape: CursorShape,
2215 block_text: Option<Line>,
2216 ) -> Cursor {
2217 Cursor {
2218 origin,
2219 block_width,
2220 line_height,
2221 color,
2222 shape,
2223 block_text,
2224 }
2225 }
2226
2227 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2228 RectF::new(
2229 self.origin + origin,
2230 vec2f(self.block_width, self.line_height),
2231 )
2232 }
2233
2234 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2235 let bounds = match self.shape {
2236 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2237 CursorShape::Block | CursorShape::Hollow => RectF::new(
2238 self.origin + origin,
2239 vec2f(self.block_width, self.line_height),
2240 ),
2241 CursorShape::Underscore => RectF::new(
2242 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2243 vec2f(self.block_width, 2.0),
2244 ),
2245 };
2246
2247 //Draw background or border quad
2248 if matches!(self.shape, CursorShape::Hollow) {
2249 scene.push_quad(Quad {
2250 bounds,
2251 background: None,
2252 border: Border::all(1., self.color),
2253 corner_radius: 0.,
2254 });
2255 } else {
2256 scene.push_quad(Quad {
2257 bounds,
2258 background: Some(self.color),
2259 border: Default::default(),
2260 corner_radius: 0.,
2261 });
2262 }
2263
2264 if let Some(block_text) = &self.block_text {
2265 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2266 }
2267 }
2268
2269 pub fn shape(&self) -> CursorShape {
2270 self.shape
2271 }
2272}
2273
2274#[derive(Debug)]
2275pub struct HighlightedRange {
2276 pub start_y: f32,
2277 pub line_height: f32,
2278 pub lines: Vec<HighlightedRangeLine>,
2279 pub color: Color,
2280 pub corner_radius: f32,
2281}
2282
2283#[derive(Debug)]
2284pub struct HighlightedRangeLine {
2285 pub start_x: f32,
2286 pub end_x: f32,
2287}
2288
2289impl HighlightedRange {
2290 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2291 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2292 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2293 self.paint_lines(
2294 self.start_y + self.line_height,
2295 &self.lines[1..],
2296 bounds,
2297 scene,
2298 );
2299 } else {
2300 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2301 }
2302 }
2303
2304 fn paint_lines(
2305 &self,
2306 start_y: f32,
2307 lines: &[HighlightedRangeLine],
2308 bounds: RectF,
2309 scene: &mut SceneBuilder,
2310 ) {
2311 if lines.is_empty() {
2312 return;
2313 }
2314
2315 let mut path = PathBuilder::new();
2316 let first_line = lines.first().unwrap();
2317 let last_line = lines.last().unwrap();
2318
2319 let first_top_left = vec2f(first_line.start_x, start_y);
2320 let first_top_right = vec2f(first_line.end_x, start_y);
2321
2322 let curve_height = vec2f(0., self.corner_radius);
2323 let curve_width = |start_x: f32, end_x: f32| {
2324 let max = (end_x - start_x) / 2.;
2325 let width = if max < self.corner_radius {
2326 max
2327 } else {
2328 self.corner_radius
2329 };
2330
2331 vec2f(width, 0.)
2332 };
2333
2334 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2335 path.reset(first_top_right - top_curve_width);
2336 path.curve_to(first_top_right + curve_height, first_top_right);
2337
2338 let mut iter = lines.iter().enumerate().peekable();
2339 while let Some((ix, line)) = iter.next() {
2340 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2341
2342 if let Some((_, next_line)) = iter.peek() {
2343 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2344
2345 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2346 Ordering::Equal => {
2347 path.line_to(bottom_right);
2348 }
2349 Ordering::Less => {
2350 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2351 path.line_to(bottom_right - curve_height);
2352 if self.corner_radius > 0. {
2353 path.curve_to(bottom_right - curve_width, bottom_right);
2354 }
2355 path.line_to(next_top_right + curve_width);
2356 if self.corner_radius > 0. {
2357 path.curve_to(next_top_right + curve_height, next_top_right);
2358 }
2359 }
2360 Ordering::Greater => {
2361 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2362 path.line_to(bottom_right - curve_height);
2363 if self.corner_radius > 0. {
2364 path.curve_to(bottom_right + curve_width, bottom_right);
2365 }
2366 path.line_to(next_top_right - curve_width);
2367 if self.corner_radius > 0. {
2368 path.curve_to(next_top_right + curve_height, next_top_right);
2369 }
2370 }
2371 }
2372 } else {
2373 let curve_width = curve_width(line.start_x, line.end_x);
2374 path.line_to(bottom_right - curve_height);
2375 if self.corner_radius > 0. {
2376 path.curve_to(bottom_right - curve_width, bottom_right);
2377 }
2378
2379 let bottom_left = vec2f(line.start_x, bottom_right.y());
2380 path.line_to(bottom_left + curve_width);
2381 if self.corner_radius > 0. {
2382 path.curve_to(bottom_left - curve_height, bottom_left);
2383 }
2384 }
2385 }
2386
2387 if first_line.start_x > last_line.start_x {
2388 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2389 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2390 path.line_to(second_top_left + curve_height);
2391 if self.corner_radius > 0. {
2392 path.curve_to(second_top_left + curve_width, second_top_left);
2393 }
2394 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2395 path.line_to(first_bottom_left - curve_width);
2396 if self.corner_radius > 0. {
2397 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2398 }
2399 }
2400
2401 path.line_to(first_top_left + curve_height);
2402 if self.corner_radius > 0. {
2403 path.curve_to(first_top_left + top_curve_width, first_top_left);
2404 }
2405 path.line_to(first_top_right - top_curve_width);
2406
2407 scene.push_path(path.build(self.color, Some(bounds)));
2408 }
2409}
2410
2411pub fn position_to_display_point(
2412 position: Vector2F,
2413 text_bounds: RectF,
2414 position_map: &PositionMap,
2415) -> Option<DisplayPoint> {
2416 if text_bounds.contains_point(position) {
2417 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2418 if point == target_point {
2419 Some(point)
2420 } else {
2421 None
2422 }
2423 } else {
2424 None
2425 }
2426}
2427
2428pub fn range_to_bounds(
2429 range: &Range<DisplayPoint>,
2430 content_origin: Vector2F,
2431 scroll_left: f32,
2432 scroll_top: f32,
2433 visible_row_range: &Range<u32>,
2434 line_end_overshoot: f32,
2435 position_map: &PositionMap,
2436) -> impl Iterator<Item = RectF> {
2437 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2438
2439 if range.start == range.end {
2440 return bounds.into_iter();
2441 }
2442
2443 let start_row = visible_row_range.start;
2444 let end_row = visible_row_range.end;
2445
2446 let row_range = if range.end.column() == 0 {
2447 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2448 } else {
2449 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2450 };
2451
2452 let first_y =
2453 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2454
2455 for (idx, row) in row_range.enumerate() {
2456 let line_layout = &position_map.line_layouts[(row - start_row) as usize];
2457
2458 let start_x = if row == range.start.row() {
2459 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2460 - scroll_left
2461 } else {
2462 content_origin.x() - scroll_left
2463 };
2464
2465 let end_x = if row == range.end.row() {
2466 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2467 } else {
2468 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2469 };
2470
2471 bounds.push(RectF::from_points(
2472 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2473 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2474 ))
2475 }
2476
2477 bounds.into_iter()
2478}
2479
2480pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2481 delta.powf(1.5) / 100.0
2482}
2483
2484fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2485 delta.powf(1.2) / 300.0
2486}
2487
2488#[cfg(test)]
2489mod tests {
2490 use super::*;
2491 use crate::{
2492 display_map::{BlockDisposition, BlockProperties},
2493 Editor, MultiBuffer,
2494 };
2495 use gpui::TestAppContext;
2496 use settings::Settings;
2497 use std::sync::Arc;
2498 use util::test::sample_text;
2499
2500 #[gpui::test]
2501 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2502 cx.update(|cx| cx.set_global(Settings::test(cx)));
2503 let (_, editor) = cx.add_window(|cx| {
2504 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2505 Editor::new(EditorMode::Full, buffer, None, None, cx)
2506 });
2507 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2508
2509 let layouts = editor.update(cx, |editor, cx| {
2510 let snapshot = editor.snapshot(cx);
2511 element
2512 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2513 .0
2514 });
2515 assert_eq!(layouts.len(), 6);
2516 }
2517
2518 #[gpui::test]
2519 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2520 cx.update(|cx| cx.set_global(Settings::test(cx)));
2521 let (_, editor) = cx.add_window(|cx| {
2522 let buffer = MultiBuffer::build_simple("", cx);
2523 Editor::new(EditorMode::Full, buffer, None, None, cx)
2524 });
2525
2526 editor.update(cx, |editor, cx| {
2527 editor.set_placeholder_text("hello", cx);
2528 editor.insert_blocks(
2529 [BlockProperties {
2530 style: BlockStyle::Fixed,
2531 disposition: BlockDisposition::Above,
2532 height: 3,
2533 position: Anchor::min(),
2534 render: Arc::new(|_| Empty::new().into_any()),
2535 }],
2536 cx,
2537 );
2538
2539 // Blur the editor so that it displays placeholder text.
2540 cx.blur();
2541 });
2542
2543 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2544 let (size, mut state) = editor.update(cx, |editor, cx| {
2545 element.layout(
2546 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2547 editor,
2548 cx,
2549 )
2550 });
2551
2552 assert_eq!(state.position_map.line_layouts.len(), 4);
2553 assert_eq!(
2554 state
2555 .line_number_layouts
2556 .iter()
2557 .map(Option::is_some)
2558 .collect::<Vec<_>>(),
2559 &[false, false, false, true]
2560 );
2561
2562 // Don't panic.
2563 let mut scene = SceneBuilder::new(1.0);
2564 let bounds = RectF::new(Default::default(), size);
2565 editor.update(cx, |editor, cx| {
2566 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2567 });
2568 }
2569}