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