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 AppContext, Axis, Border, CursorRegion, Drawable, Element, EventContext, MouseRegion, Quad,
35 SceneBuilder, SizeConstraint, ViewContext, WeakViewHandle, 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::{DerefMut, 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 view: WeakViewHandle<Editor>,
90 style: Arc<EditorStyle>,
91}
92
93impl EditorElement {
94 pub fn new(view: WeakViewHandle<Editor>, style: EditorStyle) -> Self {
95 Self {
96 view,
97 style: Arc::new(style),
98 }
99 }
100
101 fn update_view<F, T>(&self, cx: &mut AppContext, f: F) -> T
102 where
103 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
104 {
105 self.view.upgrade(cx).unwrap().update(cx, f)
106 }
107
108 fn snapshot(&self, cx: &mut AppContext) -> EditorSnapshot {
109 self.update_view(cx, |view, cx| view.snapshot(cx))
110 }
111
112 fn attach_mouse_handlers(
113 scene: &mut SceneBuilder,
114 view: &WeakViewHandle<Editor>,
115 position_map: &Arc<PositionMap>,
116 has_popovers: bool,
117 visible_bounds: RectF,
118 text_bounds: RectF,
119 gutter_bounds: RectF,
120 bounds: RectF,
121 cx: &mut ViewContext<Editor>,
122 ) {
123 enum EditorElementMouseHandlers {}
124 scene.push_mouse_region(
125 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
126 .on_down(MouseButton::Left, {
127 let position_map = position_map.clone();
128 move |e, _, cx| {
129 if !Self::mouse_down(
130 e.platform_event,
131 position_map.as_ref(),
132 text_bounds,
133 gutter_bounds,
134 cx,
135 ) {
136 cx.propagate_event();
137 }
138 }
139 })
140 .on_down(MouseButton::Right, {
141 let position_map = position_map.clone();
142 move |e, _, cx| {
143 if !Self::mouse_right_down(
144 e.position,
145 position_map.as_ref(),
146 text_bounds,
147 cx,
148 ) {
149 cx.propagate_event();
150 }
151 }
152 })
153 .on_up(MouseButton::Left, {
154 let view = view.clone();
155 let position_map = position_map.clone();
156 move |e, _, cx| {
157 if !Self::mouse_up(
158 view.clone(),
159 e.position,
160 e.cmd,
161 e.shift,
162 position_map.as_ref(),
163 text_bounds,
164 cx,
165 ) {
166 cx.propagate_event()
167 }
168 }
169 })
170 .on_drag(MouseButton::Left, {
171 let view = view.clone();
172 let position_map = position_map.clone();
173 move |e, _, cx| {
174 if !Self::mouse_dragged(
175 view.clone(),
176 e.platform_event,
177 position_map.as_ref(),
178 text_bounds,
179 cx,
180 ) {
181 cx.propagate_event()
182 }
183 }
184 })
185 .on_move({
186 let position_map = position_map.clone();
187 move |e, _, cx| {
188 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
189 cx.propagate_event()
190 }
191 }
192 })
193 .on_move_out(move |_, _: &mut Editor, cx| {
194 if has_popovers {
195 cx.dispatch_action(HideHover);
196 }
197 })
198 .on_scroll({
199 let position_map = position_map.clone();
200 move |e, _, cx| {
201 if !Self::scroll(
202 e.position,
203 *e.delta.raw(),
204 e.delta.precise(),
205 &position_map,
206 bounds,
207 cx,
208 ) {
209 cx.propagate_event()
210 }
211 }
212 }),
213 );
214
215 enum GutterHandlers {}
216 scene.push_mouse_region(
217 MouseRegion::new::<GutterHandlers>(view.id(), view.id() + 1, gutter_bounds).on_hover(
218 |hover, _: &mut Editor, cx| {
219 cx.dispatch_action(GutterHover {
220 hovered: hover.started,
221 })
222 },
223 ),
224 )
225 }
226
227 fn mouse_down(
228 MouseButtonEvent {
229 position,
230 modifiers:
231 Modifiers {
232 shift,
233 ctrl,
234 alt,
235 cmd,
236 ..
237 },
238 mut click_count,
239 ..
240 }: MouseButtonEvent,
241 position_map: &PositionMap,
242 text_bounds: RectF,
243 gutter_bounds: RectF,
244 cx: &mut EventContext<Editor>,
245 ) -> bool {
246 if gutter_bounds.contains_point(position) {
247 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
248 } else if !text_bounds.contains_point(position) {
249 return false;
250 }
251
252 let (position, target_position) = position_map.point_for_position(text_bounds, position);
253
254 if shift && alt {
255 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
256 position,
257 goal_column: target_position.column(),
258 }));
259 } else if shift && !ctrl && !alt && !cmd {
260 cx.dispatch_action(Select(SelectPhase::Extend {
261 position,
262 click_count,
263 }));
264 } else {
265 cx.dispatch_action(Select(SelectPhase::Begin {
266 position,
267 add: alt,
268 click_count,
269 }));
270 }
271
272 true
273 }
274
275 fn mouse_right_down(
276 position: Vector2F,
277 position_map: &PositionMap,
278 text_bounds: RectF,
279 cx: &mut EventContext<Editor>,
280 ) -> bool {
281 if !text_bounds.contains_point(position) {
282 return false;
283 }
284
285 let (point, _) = position_map.point_for_position(text_bounds, position);
286
287 cx.dispatch_action(DeployMouseContextMenu { position, point });
288 true
289 }
290
291 fn mouse_up(
292 view: WeakViewHandle<Editor>,
293 position: Vector2F,
294 cmd: bool,
295 shift: bool,
296 position_map: &PositionMap,
297 text_bounds: RectF,
298 cx: &mut EventContext<Editor>,
299 ) -> bool {
300 let view = view.upgrade(cx).unwrap().read(cx);
301 let end_selection = view.has_pending_selection();
302 let pending_nonempty_selections = view.has_pending_nonempty_selection();
303
304 if end_selection {
305 cx.dispatch_action(Select(SelectPhase::End));
306 }
307
308 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
309 let (point, target_point) = position_map.point_for_position(text_bounds, position);
310
311 if point == target_point {
312 if shift {
313 cx.dispatch_action(GoToFetchedTypeDefinition { point });
314 } else {
315 cx.dispatch_action(GoToFetchedDefinition { point });
316 }
317
318 return true;
319 }
320 }
321
322 end_selection
323 }
324
325 fn mouse_dragged(
326 view: WeakViewHandle<Editor>,
327 MouseMovedEvent {
328 modifiers: Modifiers { cmd, shift, .. },
329 position,
330 ..
331 }: MouseMovedEvent,
332 position_map: &PositionMap,
333 text_bounds: RectF,
334 cx: &mut EventContext<Editor>,
335 ) -> bool {
336 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
337 // Don't trigger hover popover if mouse is hovering over context menu
338 let point = if text_bounds.contains_point(position) {
339 let (point, target_point) = position_map.point_for_position(text_bounds, position);
340 if point == target_point {
341 Some(point)
342 } else {
343 None
344 }
345 } else {
346 None
347 };
348
349 cx.dispatch_action(UpdateGoToDefinitionLink {
350 point,
351 cmd_held: cmd,
352 shift_held: shift,
353 });
354
355 let view = view.upgrade(cx).unwrap().read(cx);
356 if view.has_pending_selection() {
357 let mut scroll_delta = Vector2F::zero();
358
359 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
360 let top = text_bounds.origin_y() + vertical_margin;
361 let bottom = text_bounds.lower_left().y() - vertical_margin;
362 if position.y() < top {
363 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
364 }
365 if position.y() > bottom {
366 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
367 }
368
369 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
370 let left = text_bounds.origin_x() + horizontal_margin;
371 let right = text_bounds.upper_right().x() - horizontal_margin;
372 if position.x() < left {
373 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
374 left - position.x(),
375 ))
376 }
377 if position.x() > right {
378 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
379 position.x() - right,
380 ))
381 }
382
383 let (position, target_position) =
384 position_map.point_for_position(text_bounds, position);
385
386 cx.dispatch_action(Select(SelectPhase::Update {
387 position,
388 goal_column: target_position.column(),
389 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
390 .clamp(Vector2F::zero(), position_map.scroll_max),
391 }));
392
393 cx.dispatch_action(HoverAt { point });
394 true
395 } else {
396 cx.dispatch_action(HoverAt { point });
397 false
398 }
399 }
400
401 fn mouse_moved(
402 MouseMovedEvent {
403 modifiers: Modifiers { shift, cmd, .. },
404 position,
405 ..
406 }: MouseMovedEvent,
407 position_map: &PositionMap,
408 text_bounds: RectF,
409 cx: &mut ViewContext<Editor>,
410 ) -> bool {
411 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
412 // Don't trigger hover popover if mouse is hovering over context menu
413 let point = position_to_display_point(position, text_bounds, position_map);
414
415 cx.dispatch_action(UpdateGoToDefinitionLink {
416 point,
417 cmd_held: cmd,
418 shift_held: shift,
419 });
420
421 cx.dispatch_action(HoverAt { point });
422
423 true
424 }
425
426 fn scroll(
427 position: Vector2F,
428 mut delta: Vector2F,
429 precise: bool,
430 position_map: &PositionMap,
431 bounds: RectF,
432 cx: &mut ViewContext<Editor>,
433 ) -> bool {
434 if !bounds.contains_point(position) {
435 return false;
436 }
437
438 let line_height = position_map.line_height;
439 let max_glyph_width = position_map.em_width;
440
441 let axis = if precise {
442 //Trackpad
443 position_map.snapshot.ongoing_scroll.filter(&mut delta)
444 } else {
445 //Not trackpad
446 delta *= vec2f(max_glyph_width, line_height);
447 None //Resets ongoing scroll
448 };
449
450 let scroll_position = position_map.snapshot.scroll_position();
451 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
452 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
453 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
454
455 cx.dispatch_action(Scroll {
456 scroll_position,
457 axis,
458 });
459
460 true
461 }
462
463 fn paint_background(
464 &self,
465 scene: &mut SceneBuilder,
466 gutter_bounds: RectF,
467 text_bounds: RectF,
468 layout: &LayoutState,
469 cx: &mut ViewContext<Editor>,
470 ) {
471 let bounds = gutter_bounds.union_rect(text_bounds);
472 let scroll_top =
473 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
474 scene.push_quad(Quad {
475 bounds: gutter_bounds,
476 background: Some(self.style.gutter_background),
477 border: Border::new(0., Color::transparent_black()),
478 corner_radius: 0.,
479 });
480 scene.push_quad(Quad {
481 bounds: text_bounds,
482 background: Some(self.style.background),
483 border: Border::new(0., Color::transparent_black()),
484 corner_radius: 0.,
485 });
486
487 if let EditorMode::Full = layout.mode {
488 let mut active_rows = layout.active_rows.iter().peekable();
489 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
490 let mut end_row = *start_row;
491 while active_rows.peek().map_or(false, |r| {
492 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
493 }) {
494 active_rows.next().unwrap();
495 end_row += 1;
496 }
497
498 if !contains_non_empty_selection {
499 let origin = vec2f(
500 bounds.origin_x(),
501 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
502 - scroll_top,
503 );
504 let size = vec2f(
505 bounds.width(),
506 layout.position_map.line_height * (end_row - start_row + 1) as f32,
507 );
508 scene.push_quad(Quad {
509 bounds: RectF::new(origin, size),
510 background: Some(self.style.active_line_background),
511 border: Border::default(),
512 corner_radius: 0.,
513 });
514 }
515 }
516
517 if let Some(highlighted_rows) = &layout.highlighted_rows {
518 let origin = vec2f(
519 bounds.origin_x(),
520 bounds.origin_y()
521 + (layout.position_map.line_height * highlighted_rows.start as f32)
522 - scroll_top,
523 );
524 let size = vec2f(
525 bounds.width(),
526 layout.position_map.line_height * highlighted_rows.len() as f32,
527 );
528 scene.push_quad(Quad {
529 bounds: RectF::new(origin, size),
530 background: Some(self.style.highlighted_line_background),
531 border: Border::default(),
532 corner_radius: 0.,
533 });
534 }
535 }
536 }
537
538 fn paint_gutter(
539 &mut self,
540 scene: &mut SceneBuilder,
541 bounds: RectF,
542 visible_bounds: RectF,
543 layout: &mut LayoutState,
544 editor: &mut Editor,
545 cx: &mut ViewContext<Editor>,
546 ) {
547 let line_height = layout.position_map.line_height;
548
549 let scroll_position = layout.position_map.snapshot.scroll_position();
550 let scroll_top = scroll_position.y() * line_height;
551
552 let show_gutter = matches!(
553 &cx.global::<Settings>()
554 .git_overrides
555 .git_gutter
556 .unwrap_or_default(),
557 GitGutter::TrackedFiles
558 );
559
560 if show_gutter {
561 Self::paint_diff_hunks(scene, bounds, layout, cx);
562 }
563
564 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
565 if let Some(line) = line {
566 let line_origin = bounds.origin()
567 + vec2f(
568 bounds.width() - line.width() - layout.gutter_padding,
569 ix as f32 * line_height - (scroll_top % line_height),
570 );
571
572 line.paint(scene, line_origin, visible_bounds, line_height, cx);
573 }
574 }
575
576 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
577 if let Some(indicator) = fold_indicator.as_mut() {
578 let position = vec2f(
579 bounds.width() - layout.gutter_padding,
580 ix as f32 * line_height - (scroll_top % line_height),
581 );
582 let centering_offset = vec2f(
583 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
584 (line_height - indicator.size().y()) / 2.,
585 );
586
587 let indicator_origin = bounds.origin() + position + centering_offset;
588
589 indicator.paint(scene, indicator_origin, visible_bounds, editor, 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(
599 scene,
600 bounds.origin() + vec2f(x, y),
601 visible_bounds,
602 editor,
603 cx,
604 );
605 }
606 }
607
608 fn paint_diff_hunks(
609 scene: &mut SceneBuilder,
610 bounds: RectF,
611 layout: &mut LayoutState,
612 cx: &mut ViewContext<Editor>,
613 ) {
614 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
615 let line_height = layout.position_map.line_height;
616
617 let scroll_position = layout.position_map.snapshot.scroll_position();
618 let scroll_top = scroll_position.y() * line_height;
619
620 for hunk in &layout.display_hunks {
621 let (display_row_range, status) = match hunk {
622 //TODO: This rendering is entirely a horrible hack
623 &DisplayDiffHunk::Folded { display_row: row } => {
624 let start_y = row as f32 * line_height - scroll_top;
625 let end_y = start_y + line_height;
626
627 let width = diff_style.removed_width_em * line_height;
628 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
629 let highlight_size = vec2f(width * 2., end_y - start_y);
630 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
631
632 scene.push_quad(Quad {
633 bounds: highlight_bounds,
634 background: Some(diff_style.modified),
635 border: Border::new(0., Color::transparent_black()),
636 corner_radius: 1. * line_height,
637 });
638
639 continue;
640 }
641
642 DisplayDiffHunk::Unfolded {
643 display_row_range,
644 status,
645 } => (display_row_range, status),
646 };
647
648 let color = match status {
649 DiffHunkStatus::Added => diff_style.inserted,
650 DiffHunkStatus::Modified => diff_style.modified,
651
652 //TODO: This rendering is entirely a horrible hack
653 DiffHunkStatus::Removed => {
654 let row = *display_row_range.start();
655
656 let offset = line_height / 2.;
657 let start_y = row as f32 * line_height - offset - scroll_top;
658 let end_y = start_y + line_height;
659
660 let width = diff_style.removed_width_em * line_height;
661 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
662 let highlight_size = vec2f(width * 2., end_y - start_y);
663 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
664
665 scene.push_quad(Quad {
666 bounds: highlight_bounds,
667 background: Some(diff_style.deleted),
668 border: Border::new(0., Color::transparent_black()),
669 corner_radius: 1. * line_height,
670 });
671
672 continue;
673 }
674 };
675
676 let start_row = *display_row_range.start();
677 let end_row = *display_row_range.end();
678
679 let start_y = start_row as f32 * line_height - scroll_top;
680 let end_y = end_row as f32 * line_height - scroll_top + line_height;
681
682 let width = diff_style.width_em * line_height;
683 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
684 let highlight_size = vec2f(width * 2., end_y - start_y);
685 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
686
687 scene.push_quad(Quad {
688 bounds: highlight_bounds,
689 background: Some(color),
690 border: Border::new(0., Color::transparent_black()),
691 corner_radius: diff_style.corner_radius * line_height,
692 });
693 }
694 }
695
696 fn paint_text(
697 &mut self,
698 scene: &mut SceneBuilder,
699 bounds: RectF,
700 visible_bounds: RectF,
701 layout: &mut LayoutState,
702 editor: &mut Editor,
703 cx: &mut ViewContext<Editor>,
704 ) {
705 let style = &self.style;
706 let local_replica_id = editor.replica_id(cx);
707 let scroll_position = layout.position_map.snapshot.scroll_position();
708 let start_row = layout.visible_display_row_range.start;
709 let scroll_top = scroll_position.y() * layout.position_map.line_height;
710 let max_glyph_width = layout.position_map.em_width;
711 let scroll_left = scroll_position.x() * max_glyph_width;
712 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
713 let line_end_overshoot = 0.15 * layout.position_map.line_height;
714
715 scene.push_layer(Some(bounds));
716
717 scene.push_cursor_region(CursorRegion {
718 bounds,
719 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
720 CursorStyle::PointingHand
721 } else {
722 CursorStyle::IBeam
723 },
724 });
725
726 let fold_corner_radius =
727 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
728 for (id, range, color) in layout.fold_ranges.iter() {
729 self.paint_highlighted_range(
730 scene,
731 range.clone(),
732 *color,
733 fold_corner_radius,
734 fold_corner_radius * 2.,
735 layout,
736 content_origin,
737 scroll_top,
738 scroll_left,
739 bounds,
740 cx,
741 );
742
743 for bound in range_to_bounds(
744 &range,
745 content_origin,
746 scroll_left,
747 scroll_top,
748 &layout.visible_display_row_range,
749 line_end_overshoot,
750 &layout.position_map,
751 ) {
752 scene.push_cursor_region(CursorRegion {
753 bounds: bound,
754 style: CursorStyle::PointingHand,
755 });
756
757 let display_row = range.start.row();
758
759 let buffer_row = DisplayPoint::new(display_row, 0)
760 .to_point(&layout.position_map.snapshot.display_snapshot)
761 .row;
762
763 scene.push_mouse_region(
764 MouseRegion::new::<FoldMarkers>(self.view.id(), *id as usize, bound)
765 .on_click(MouseButton::Left, move |_, _: &mut Editor, cx| {
766 cx.dispatch_action(UnfoldAt { buffer_row })
767 })
768 .with_notify_on_hover(true)
769 .with_notify_on_click(true),
770 )
771 }
772 }
773
774 for (range, color) in &layout.highlighted_ranges {
775 self.paint_highlighted_range(
776 scene,
777 range.clone(),
778 *color,
779 0.,
780 line_end_overshoot,
781 layout,
782 content_origin,
783 scroll_top,
784 scroll_left,
785 bounds,
786 cx,
787 );
788 }
789
790 let mut cursors = SmallVec::<[Cursor; 32]>::new();
791 let corner_radius = 0.15 * layout.position_map.line_height;
792
793 for (replica_id, selections) in &layout.selections {
794 let selection_style = style.replica_selection_style(*replica_id);
795
796 for selection in selections {
797 self.paint_highlighted_range(
798 scene,
799 selection.range.clone(),
800 selection_style.selection,
801 corner_radius,
802 corner_radius * 2.,
803 layout,
804 content_origin,
805 scroll_top,
806 scroll_left,
807 bounds,
808 cx,
809 );
810
811 if editor.show_local_cursors(cx) || *replica_id != local_replica_id {
812 let cursor_position = selection.head;
813 if layout
814 .visible_display_row_range
815 .contains(&cursor_position.row())
816 {
817 let cursor_row_layout = &layout.position_map.line_layouts
818 [(cursor_position.row() - start_row) as usize];
819 let cursor_column = cursor_position.column() as usize;
820
821 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
822 let mut block_width =
823 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
824 if block_width == 0.0 {
825 block_width = layout.position_map.em_width;
826 }
827 let block_text = if let CursorShape::Block = selection.cursor_shape {
828 layout
829 .position_map
830 .snapshot
831 .chars_at(cursor_position)
832 .next()
833 .and_then(|(character, _)| {
834 let font_id =
835 cursor_row_layout.font_for_index(cursor_column)?;
836 let text = character.to_string();
837
838 Some(cx.text_layout_cache().layout_str(
839 &text,
840 cursor_row_layout.font_size(),
841 &[(
842 text.len(),
843 RunStyle {
844 font_id,
845 color: style.background,
846 underline: Default::default(),
847 },
848 )],
849 ))
850 })
851 } else {
852 None
853 };
854
855 let x = cursor_character_x - scroll_left;
856 let y = cursor_position.row() as f32 * layout.position_map.line_height
857 - scroll_top;
858 cursors.push(Cursor {
859 color: selection_style.cursor,
860 block_width,
861 origin: vec2f(x, y),
862 line_height: layout.position_map.line_height,
863 shape: selection.cursor_shape,
864 block_text,
865 });
866 }
867 }
868 }
869 }
870
871 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
872 // Draw glyphs
873 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
874 let row = start_row + ix as u32;
875 line.paint(
876 scene,
877 content_origin
878 + vec2f(
879 -scroll_left,
880 row as f32 * layout.position_map.line_height - scroll_top,
881 ),
882 visible_text_bounds,
883 layout.position_map.line_height,
884 cx,
885 );
886 }
887 }
888
889 scene.push_layer(Some(bounds));
890
891 scene.paint_layer(Some(bounds), |scene| {
892 for cursor in cursors {
893 cursor.paint(scene, content_origin, cx);
894 }
895 });
896
897 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
898 scene.push_stacking_context(None, None);
899 let cursor_row_layout =
900 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
901 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
902 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
903 let mut list_origin = content_origin + vec2f(x, y);
904 let list_width = context_menu.size().x();
905 let list_height = context_menu.size().y();
906
907 // Snap the right edge of the list to the right edge of the window if
908 // its horizontal bounds overflow.
909 if list_origin.x() + list_width > cx.window_size().x() {
910 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
911 }
912
913 if list_origin.y() + list_height > bounds.max_y() {
914 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
915 }
916
917 context_menu.paint(
918 scene,
919 list_origin,
920 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
921 editor,
922 cx,
923 );
924
925 scene.pop_stacking_context();
926 }
927
928 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
929 scene.push_stacking_context(None, None);
930
931 // This is safe because we check on layout whether the required row is available
932 let hovered_row_layout =
933 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
934
935 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
936 // height. This is the size we will use to decide whether to render popovers above or below
937 // the hovered line.
938 let first_size = hover_popovers[0].size();
939 let height_to_reserve = first_size.y()
940 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
941
942 // Compute Hovered Point
943 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
944 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
945 let hovered_point = content_origin + vec2f(x, y);
946
947 if hovered_point.y() - height_to_reserve > 0.0 {
948 // There is enough space above. Render popovers above the hovered point
949 let mut current_y = hovered_point.y();
950 for hover_popover in hover_popovers {
951 let size = hover_popover.size();
952 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
953
954 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
955 if x_out_of_bounds < 0.0 {
956 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
957 }
958
959 hover_popover.paint(
960 scene,
961 popover_origin,
962 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
963 editor,
964 cx,
965 );
966
967 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
968 }
969 } else {
970 // There is not enough space above. Render popovers below the hovered point
971 let mut current_y = hovered_point.y() + layout.position_map.line_height;
972 for hover_popover in hover_popovers {
973 let size = hover_popover.size();
974 let mut popover_origin = vec2f(hovered_point.x(), current_y);
975
976 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
977 if x_out_of_bounds < 0.0 {
978 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
979 }
980
981 hover_popover.paint(
982 scene,
983 popover_origin,
984 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
985 editor,
986 cx,
987 );
988
989 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
990 }
991 }
992
993 scene.pop_stacking_context();
994 }
995
996 scene.pop_layer();
997 }
998
999 fn paint_scrollbar(
1000 &mut self,
1001 scene: &mut SceneBuilder,
1002 bounds: RectF,
1003 layout: &mut LayoutState,
1004 cx: &mut ViewContext<Editor>,
1005 ) {
1006 enum ScrollbarMouseHandlers {}
1007 if layout.mode != EditorMode::Full {
1008 return;
1009 }
1010
1011 let view = self.view.clone();
1012 let style = &self.style.theme.scrollbar;
1013
1014 let top = bounds.min_y();
1015 let bottom = bounds.max_y();
1016 let right = bounds.max_x();
1017 let left = right - style.width;
1018 let row_range = &layout.scrollbar_row_range;
1019 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1020
1021 let mut height = bounds.height();
1022 let mut first_row_y_offset = 0.0;
1023
1024 // Impose a minimum height on the scrollbar thumb
1025 let min_thumb_height =
1026 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1027 let thumb_height = (row_range.end - row_range.start) * height / max_row;
1028 if thumb_height < min_thumb_height {
1029 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1030 height -= min_thumb_height - thumb_height;
1031 }
1032
1033 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1034
1035 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1036 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1037 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1038 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1039
1040 if layout.show_scrollbars {
1041 scene.push_quad(Quad {
1042 bounds: track_bounds,
1043 border: style.track.border,
1044 background: style.track.background_color,
1045 ..Default::default()
1046 });
1047 scene.push_quad(Quad {
1048 bounds: thumb_bounds,
1049 border: style.thumb.border,
1050 background: style.thumb.background_color,
1051 corner_radius: style.thumb.corner_radius,
1052 });
1053 }
1054
1055 scene.push_cursor_region(CursorRegion {
1056 bounds: track_bounds,
1057 style: CursorStyle::Arrow,
1058 });
1059 scene.push_mouse_region(
1060 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
1061 .on_move({
1062 let view = view.clone();
1063 move |_, _: &mut Editor, cx| {
1064 if let Some(view) = view.upgrade(cx.deref_mut()) {
1065 view.update(cx.deref_mut(), |view, cx| {
1066 view.scroll_manager.show_scrollbar(cx);
1067 });
1068 }
1069 }
1070 })
1071 .on_down(MouseButton::Left, {
1072 let view = view.clone();
1073 let row_range = row_range.clone();
1074 move |e, _: &mut Editor, cx| {
1075 let y = e.position.y();
1076 if let Some(view) = view.upgrade(cx.deref_mut()) {
1077 view.update(cx.deref_mut(), |view, cx| {
1078 if y < thumb_top || thumb_bottom < y {
1079 let center_row =
1080 ((y - top) * max_row as f32 / height).round() as u32;
1081 let top_row = center_row.saturating_sub(
1082 (row_range.end - row_range.start) as u32 / 2,
1083 );
1084 let mut position = view.scroll_position(cx);
1085 position.set_y(top_row as f32);
1086 view.set_scroll_position(position, cx);
1087 } else {
1088 view.scroll_manager.show_scrollbar(cx);
1089 }
1090 });
1091 }
1092 }
1093 })
1094 .on_drag(MouseButton::Left, {
1095 let view = view.clone();
1096 move |e, _: &mut Editor, cx| {
1097 let y = e.prev_mouse_position.y();
1098 let new_y = e.position.y();
1099 if thumb_top < y && y < thumb_bottom {
1100 if let Some(view) = view.upgrade(cx.deref_mut()) {
1101 view.update(cx.deref_mut(), |view, cx| {
1102 let mut position = view.scroll_position(cx);
1103 position.set_y(
1104 position.y() + (new_y - y) * (max_row as f32) / height,
1105 );
1106 if position.y() < 0.0 {
1107 position.set_y(0.);
1108 }
1109 view.set_scroll_position(position, cx);
1110 });
1111 }
1112 }
1113 }
1114 }),
1115 );
1116 }
1117
1118 #[allow(clippy::too_many_arguments)]
1119 fn paint_highlighted_range(
1120 &self,
1121 scene: &mut SceneBuilder,
1122 range: Range<DisplayPoint>,
1123 color: Color,
1124 corner_radius: f32,
1125 line_end_overshoot: f32,
1126 layout: &LayoutState,
1127 content_origin: Vector2F,
1128 scroll_top: f32,
1129 scroll_left: f32,
1130 bounds: RectF,
1131 cx: &mut ViewContext<Editor>,
1132 ) {
1133 let start_row = layout.visible_display_row_range.start;
1134 let end_row = layout.visible_display_row_range.end;
1135 if range.start != range.end {
1136 let row_range = if range.end.column() == 0 {
1137 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1138 } else {
1139 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1140 };
1141
1142 let highlighted_range = HighlightedRange {
1143 color,
1144 line_height: layout.position_map.line_height,
1145 corner_radius,
1146 start_y: content_origin.y()
1147 + row_range.start as f32 * layout.position_map.line_height
1148 - scroll_top,
1149 lines: row_range
1150 .into_iter()
1151 .map(|row| {
1152 let line_layout =
1153 &layout.position_map.line_layouts[(row - start_row) as usize];
1154 HighlightedRangeLine {
1155 start_x: if row == range.start.row() {
1156 content_origin.x()
1157 + line_layout.x_for_index(range.start.column() as usize)
1158 - scroll_left
1159 } else {
1160 content_origin.x() - scroll_left
1161 },
1162 end_x: if row == range.end.row() {
1163 content_origin.x()
1164 + line_layout.x_for_index(range.end.column() as usize)
1165 - scroll_left
1166 } else {
1167 content_origin.x() + line_layout.width() + line_end_overshoot
1168 - scroll_left
1169 },
1170 }
1171 })
1172 .collect(),
1173 };
1174
1175 highlighted_range.paint(bounds, scene);
1176 }
1177 }
1178
1179 fn paint_blocks(
1180 &mut self,
1181 scene: &mut SceneBuilder,
1182 bounds: RectF,
1183 visible_bounds: RectF,
1184 layout: &mut LayoutState,
1185 editor: &mut Editor,
1186 cx: &mut ViewContext<Editor>,
1187 ) {
1188 let scroll_position = layout.position_map.snapshot.scroll_position();
1189 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1190 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1191
1192 for block in &mut layout.blocks {
1193 let mut origin = bounds.origin()
1194 + vec2f(
1195 0.,
1196 block.row as f32 * layout.position_map.line_height - scroll_top,
1197 );
1198 if !matches!(block.style, BlockStyle::Sticky) {
1199 origin += vec2f(-scroll_left, 0.);
1200 }
1201 block
1202 .element
1203 .paint(scene, origin, visible_bounds, editor, cx);
1204 }
1205 }
1206
1207 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1208 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1209 let style = &self.style;
1210
1211 cx.text_layout_cache()
1212 .layout_str(
1213 "1".repeat(digit_count).as_str(),
1214 style.text.font_size,
1215 &[(
1216 digit_count,
1217 RunStyle {
1218 font_id: style.text.font_id,
1219 color: Color::black(),
1220 underline: Default::default(),
1221 },
1222 )],
1223 )
1224 .width()
1225 }
1226
1227 //Folds contained in a hunk are ignored apart from shrinking visual size
1228 //If a fold contains any hunks then that fold line is marked as modified
1229 fn layout_git_gutters(
1230 &self,
1231 display_rows: Range<u32>,
1232 snapshot: &EditorSnapshot,
1233 ) -> Vec<DisplayDiffHunk> {
1234 let buffer_snapshot = &snapshot.buffer_snapshot;
1235
1236 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1237 .to_point(snapshot)
1238 .row;
1239 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1240 .to_point(snapshot)
1241 .row;
1242
1243 buffer_snapshot
1244 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1245 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1246 .dedup()
1247 .collect()
1248 }
1249
1250 fn layout_line_numbers(
1251 &self,
1252 rows: Range<u32>,
1253 active_rows: &BTreeMap<u32, bool>,
1254 is_singleton: bool,
1255 snapshot: &EditorSnapshot,
1256 cx: &ViewContext<Editor>,
1257 ) -> (
1258 Vec<Option<text_layout::Line>>,
1259 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1260 ) {
1261 let style = &self.style;
1262 let include_line_numbers = snapshot.mode == EditorMode::Full;
1263 let mut line_number_layouts = Vec::with_capacity(rows.len());
1264 let mut fold_statuses = Vec::with_capacity(rows.len());
1265 let mut line_number = String::new();
1266 for (ix, row) in snapshot
1267 .buffer_rows(rows.start)
1268 .take((rows.end - rows.start) as usize)
1269 .enumerate()
1270 {
1271 let display_row = rows.start + ix as u32;
1272 let (active, color) = if active_rows.contains_key(&display_row) {
1273 (true, style.line_number_active)
1274 } else {
1275 (false, style.line_number)
1276 };
1277 if let Some(buffer_row) = row {
1278 if include_line_numbers {
1279 line_number.clear();
1280 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1281 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1282 &line_number,
1283 style.text.font_size,
1284 &[(
1285 line_number.len(),
1286 RunStyle {
1287 font_id: style.text.font_id,
1288 color,
1289 underline: Default::default(),
1290 },
1291 )],
1292 )));
1293 fold_statuses.push(
1294 is_singleton
1295 .then(|| {
1296 snapshot
1297 .fold_for_line(buffer_row)
1298 .map(|fold_status| (fold_status, buffer_row, active))
1299 })
1300 .flatten(),
1301 )
1302 }
1303 } else {
1304 fold_statuses.push(None);
1305 line_number_layouts.push(None);
1306 }
1307 }
1308
1309 (line_number_layouts, fold_statuses)
1310 }
1311
1312 fn layout_lines(
1313 &mut self,
1314 rows: Range<u32>,
1315 snapshot: &EditorSnapshot,
1316 cx: &ViewContext<Editor>,
1317 ) -> Vec<text_layout::Line> {
1318 if rows.start >= rows.end {
1319 return Vec::new();
1320 }
1321
1322 // When the editor is empty and unfocused, then show the placeholder.
1323 if snapshot.is_empty() {
1324 let placeholder_style = self
1325 .style
1326 .placeholder_text
1327 .as_ref()
1328 .unwrap_or(&self.style.text);
1329 let placeholder_text = snapshot.placeholder_text();
1330 let placeholder_lines = placeholder_text
1331 .as_ref()
1332 .map_or("", AsRef::as_ref)
1333 .split('\n')
1334 .skip(rows.start as usize)
1335 .chain(iter::repeat(""))
1336 .take(rows.len());
1337 placeholder_lines
1338 .map(|line| {
1339 cx.text_layout_cache().layout_str(
1340 line,
1341 placeholder_style.font_size,
1342 &[(
1343 line.len(),
1344 RunStyle {
1345 font_id: placeholder_style.font_id,
1346 color: placeholder_style.color,
1347 underline: Default::default(),
1348 },
1349 )],
1350 )
1351 })
1352 .collect()
1353 } else {
1354 let style = &self.style;
1355 let chunks = snapshot
1356 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1357 .map(|chunk| {
1358 let mut highlight_style = chunk
1359 .syntax_highlight_id
1360 .and_then(|id| id.style(&style.syntax));
1361
1362 if let Some(chunk_highlight) = chunk.highlight_style {
1363 if let Some(highlight_style) = highlight_style.as_mut() {
1364 highlight_style.highlight(chunk_highlight);
1365 } else {
1366 highlight_style = Some(chunk_highlight);
1367 }
1368 }
1369
1370 let mut diagnostic_highlight = HighlightStyle::default();
1371
1372 if chunk.is_unnecessary {
1373 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1374 }
1375
1376 if let Some(severity) = chunk.diagnostic_severity {
1377 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1378 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1379 let diagnostic_style = super::diagnostic_style(severity, true, style);
1380 diagnostic_highlight.underline = Some(Underline {
1381 color: Some(diagnostic_style.message.text.color),
1382 thickness: 1.0.into(),
1383 squiggly: true,
1384 });
1385 }
1386 }
1387
1388 if let Some(highlight_style) = highlight_style.as_mut() {
1389 highlight_style.highlight(diagnostic_highlight);
1390 } else {
1391 highlight_style = Some(diagnostic_highlight);
1392 }
1393
1394 (chunk.text, highlight_style)
1395 });
1396 layout_highlighted_chunks(
1397 chunks,
1398 &style.text,
1399 cx.text_layout_cache(),
1400 cx.font_cache(),
1401 MAX_LINE_LEN,
1402 rows.len() as usize,
1403 )
1404 }
1405 }
1406
1407 #[allow(clippy::too_many_arguments)]
1408 fn layout_blocks(
1409 &mut self,
1410 rows: Range<u32>,
1411 snapshot: &EditorSnapshot,
1412 editor_width: f32,
1413 scroll_width: f32,
1414 gutter_padding: f32,
1415 gutter_width: f32,
1416 em_width: f32,
1417 text_x: f32,
1418 line_height: f32,
1419 style: &EditorStyle,
1420 line_layouts: &[text_layout::Line],
1421 include_root: bool,
1422 editor: &mut Editor,
1423 cx: &mut ViewContext<Editor>,
1424 ) -> (f32, Vec<BlockLayout>) {
1425 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1426 let scroll_x = snapshot.scroll_anchor.offset.x();
1427 let (fixed_blocks, non_fixed_blocks) = snapshot
1428 .blocks_in_range(rows.clone())
1429 .partition::<Vec<_>, _>(|(_, block)| match block {
1430 TransformBlock::ExcerptHeader { .. } => false,
1431 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1432 });
1433 let mut render_block = |block: &TransformBlock, width: f32| {
1434 let mut element = match block {
1435 TransformBlock::Custom(block) => {
1436 let align_to = block
1437 .position()
1438 .to_point(&snapshot.buffer_snapshot)
1439 .to_display_point(snapshot);
1440 let anchor_x = text_x
1441 + if rows.contains(&align_to.row()) {
1442 line_layouts[(align_to.row() - rows.start) as usize]
1443 .x_for_index(align_to.column() as usize)
1444 } else {
1445 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1446 .x_for_index(align_to.column() as usize)
1447 };
1448
1449 block.render(&mut BlockContext {
1450 view_context: cx,
1451 anchor_x,
1452 gutter_padding,
1453 line_height,
1454 scroll_x,
1455 gutter_width,
1456 em_width,
1457 })
1458 }
1459 TransformBlock::ExcerptHeader {
1460 id,
1461 buffer,
1462 range,
1463 starts_new_buffer,
1464 ..
1465 } => {
1466 let id = *id;
1467 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1468 let jump_position = range
1469 .primary
1470 .as_ref()
1471 .map_or(range.context.start, |primary| primary.start);
1472 let jump_action = crate::Jump {
1473 path: ProjectPath {
1474 worktree_id: file.worktree_id(cx),
1475 path: file.path.clone(),
1476 },
1477 position: language::ToPoint::to_point(&jump_position, buffer),
1478 anchor: jump_position,
1479 };
1480
1481 enum JumpIcon {}
1482 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
1483 let style = style.jump_icon.style_for(state, false);
1484 Svg::new("icons/arrow_up_right_8.svg")
1485 .with_color(style.color)
1486 .constrained()
1487 .with_width(style.icon_width)
1488 .aligned()
1489 .contained()
1490 .with_style(style.container)
1491 .constrained()
1492 .with_width(style.button_width)
1493 .with_height(style.button_width)
1494 .boxed()
1495 })
1496 .with_cursor_style(CursorStyle::PointingHand)
1497 .on_click(MouseButton::Left, move |_, _, cx| {
1498 cx.dispatch_action(jump_action.clone())
1499 })
1500 .with_tooltip::<JumpIcon>(
1501 id.into(),
1502 "Jump to Buffer".to_string(),
1503 Some(Box::new(crate::OpenExcerpts)),
1504 tooltip_style.clone(),
1505 cx,
1506 )
1507 .aligned()
1508 .flex_float()
1509 .boxed()
1510 });
1511
1512 if *starts_new_buffer {
1513 let style = &self.style.diagnostic_path_header;
1514 let font_size =
1515 (style.text_scale_factor * self.style.text.font_size).round();
1516
1517 let path = buffer.resolve_file_path(cx, include_root);
1518 let mut filename = None;
1519 let mut parent_path = None;
1520 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1521 if let Some(path) = path {
1522 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1523 parent_path =
1524 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1525 }
1526
1527 Flex::row()
1528 .with_child(
1529 Label::new(
1530 filename.unwrap_or_else(|| "untitled".to_string()),
1531 style.filename.text.clone().with_font_size(font_size),
1532 )
1533 .contained()
1534 .with_style(style.filename.container)
1535 .aligned()
1536 .boxed(),
1537 )
1538 .with_children(parent_path.map(|path| {
1539 Label::new(path, style.path.text.clone().with_font_size(font_size))
1540 .contained()
1541 .with_style(style.path.container)
1542 .aligned()
1543 .boxed()
1544 }))
1545 .with_children(jump_icon)
1546 .contained()
1547 .with_style(style.container)
1548 .with_padding_left(gutter_padding)
1549 .with_padding_right(gutter_padding)
1550 .expanded()
1551 .named("path header block")
1552 } else {
1553 let text_style = self.style.text.clone();
1554 Flex::row()
1555 .with_child(Label::new("⋯", text_style).boxed())
1556 .with_children(jump_icon)
1557 .contained()
1558 .with_padding_left(gutter_padding)
1559 .with_padding_right(gutter_padding)
1560 .expanded()
1561 .named("collapsed context")
1562 }
1563 }
1564 };
1565
1566 element.layout(
1567 SizeConstraint {
1568 min: Vector2F::zero(),
1569 max: vec2f(width, block.height() as f32 * line_height),
1570 },
1571 editor,
1572 cx,
1573 );
1574 element
1575 };
1576
1577 let mut fixed_block_max_width = 0f32;
1578 let mut blocks = Vec::new();
1579 for (row, block) in fixed_blocks {
1580 let element = render_block(block, f32::INFINITY);
1581 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1582 blocks.push(BlockLayout {
1583 row,
1584 element,
1585 style: BlockStyle::Fixed,
1586 });
1587 }
1588 for (row, block) in non_fixed_blocks {
1589 let style = match block {
1590 TransformBlock::Custom(block) => block.style(),
1591 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1592 };
1593 let width = match style {
1594 BlockStyle::Sticky => editor_width,
1595 BlockStyle::Flex => editor_width
1596 .max(fixed_block_max_width)
1597 .max(gutter_width + scroll_width),
1598 BlockStyle::Fixed => unreachable!(),
1599 };
1600 let element = render_block(block, width);
1601 blocks.push(BlockLayout {
1602 row,
1603 element,
1604 style,
1605 });
1606 }
1607 (
1608 scroll_width.max(fixed_block_max_width - gutter_width),
1609 blocks,
1610 )
1611 }
1612}
1613
1614impl Drawable<Editor> for EditorElement {
1615 type LayoutState = LayoutState;
1616 type PaintState = ();
1617
1618 fn layout(
1619 &mut self,
1620 constraint: SizeConstraint,
1621 editor: &mut Editor,
1622 cx: &mut ViewContext<Editor>,
1623 ) -> (Vector2F, Self::LayoutState) {
1624 let mut size = constraint.max;
1625 if size.x().is_infinite() {
1626 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1627 }
1628
1629 let snapshot = self.snapshot(cx);
1630 let style = self.style.clone();
1631 let line_height = style.text.line_height(cx.font_cache());
1632
1633 let gutter_padding;
1634 let gutter_width;
1635 let gutter_margin;
1636 if snapshot.mode == EditorMode::Full {
1637 gutter_padding = style.text.em_width(cx.font_cache()) * style.gutter_padding_factor;
1638 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1639 gutter_margin = -style.text.descent(cx.font_cache());
1640 } else {
1641 gutter_padding = 0.0;
1642 gutter_width = 0.0;
1643 gutter_margin = 0.0;
1644 };
1645
1646 let text_width = size.x() - gutter_width;
1647 let em_width = style.text.em_width(cx.font_cache());
1648 let em_advance = style.text.em_advance(cx.font_cache());
1649 let overscroll = vec2f(em_width, 0.);
1650 let snapshot = self.update_view(cx, |view, cx| {
1651 view.set_visible_line_count(size.y() / line_height);
1652
1653 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1654 let wrap_width = match view.soft_wrap_mode(cx) {
1655 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1656 SoftWrap::EditorWidth => editor_width,
1657 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1658 };
1659
1660 if view.set_wrap_width(Some(wrap_width), cx) {
1661 view.snapshot(cx)
1662 } else {
1663 snapshot
1664 }
1665 });
1666
1667 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1668 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1669 size.set_y(
1670 scroll_height
1671 .min(constraint.max_along(Axis::Vertical))
1672 .max(constraint.min_along(Axis::Vertical))
1673 .min(line_height * max_lines as f32),
1674 )
1675 } else if let EditorMode::SingleLine = snapshot.mode {
1676 size.set_y(
1677 line_height
1678 .min(constraint.max_along(Axis::Vertical))
1679 .max(constraint.min_along(Axis::Vertical)),
1680 )
1681 } else if size.y().is_infinite() {
1682 size.set_y(scroll_height);
1683 }
1684 let gutter_size = vec2f(gutter_width, size.y());
1685 let text_size = vec2f(text_width, size.y());
1686
1687 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx, |view, cx| {
1688 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1689 let snapshot = view.snapshot(cx);
1690 (autoscroll_horizontally, snapshot)
1691 });
1692
1693 let scroll_position = snapshot.scroll_position();
1694 // The scroll position is a fractional point, the whole number of which represents
1695 // the top of the window in terms of display rows.
1696 let start_row = scroll_position.y() as u32;
1697 let height_in_lines = size.y() / line_height;
1698 let max_row = snapshot.max_point().row();
1699
1700 // Add 1 to ensure selections bleed off screen
1701 let end_row = 1 + cmp::min(
1702 (scroll_position.y() + height_in_lines).ceil() as u32,
1703 max_row,
1704 );
1705
1706 let start_anchor = if start_row == 0 {
1707 Anchor::min()
1708 } else {
1709 snapshot
1710 .buffer_snapshot
1711 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1712 };
1713 let end_anchor = if end_row > max_row {
1714 Anchor::max()
1715 } else {
1716 snapshot
1717 .buffer_snapshot
1718 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1719 };
1720
1721 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1722 let mut active_rows = BTreeMap::new();
1723 let mut highlighted_rows = None;
1724 let mut highlighted_ranges = Vec::new();
1725 let mut fold_ranges = Vec::new();
1726 let mut show_scrollbars = false;
1727 let mut include_root = false;
1728 let mut is_singleton = false;
1729 self.update_view(cx, |view, cx| {
1730 is_singleton = view.is_singleton(cx);
1731
1732 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1733
1734 highlighted_rows = view.highlighted_rows();
1735 let theme = cx.global::<Settings>().theme.as_ref();
1736 highlighted_ranges =
1737 view.background_highlights_in_range(start_anchor..end_anchor, &display_map, theme);
1738
1739 fold_ranges.extend(
1740 snapshot
1741 .folds_in_range(start_anchor..end_anchor)
1742 .map(|anchor| {
1743 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1744 (
1745 start.row,
1746 start.to_display_point(&snapshot.display_snapshot)
1747 ..anchor.end.to_display_point(&snapshot),
1748 )
1749 }),
1750 );
1751
1752 let mut remote_selections = HashMap::default();
1753 for (replica_id, line_mode, cursor_shape, selection) in display_map
1754 .buffer_snapshot
1755 .remote_selections_in_range(&(start_anchor..end_anchor))
1756 {
1757 // The local selections match the leader's selections.
1758 if Some(replica_id) == view.leader_replica_id {
1759 continue;
1760 }
1761 remote_selections
1762 .entry(replica_id)
1763 .or_insert(Vec::new())
1764 .push(SelectionLayout::new(
1765 selection,
1766 line_mode,
1767 cursor_shape,
1768 &display_map,
1769 ));
1770 }
1771 selections.extend(remote_selections);
1772
1773 if view.show_local_selections {
1774 let mut local_selections = view
1775 .selections
1776 .disjoint_in_range(start_anchor..end_anchor, cx);
1777 local_selections.extend(view.selections.pending(cx));
1778 for selection in &local_selections {
1779 let is_empty = selection.start == selection.end;
1780 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1781 let selection_end = snapshot.next_line_boundary(selection.end).1;
1782 for row in cmp::max(selection_start.row(), start_row)
1783 ..=cmp::min(selection_end.row(), end_row)
1784 {
1785 let contains_non_empty_selection =
1786 active_rows.entry(row).or_insert(!is_empty);
1787 *contains_non_empty_selection |= !is_empty;
1788 }
1789 }
1790
1791 // Render the local selections in the leader's color when following.
1792 let local_replica_id = view
1793 .leader_replica_id
1794 .unwrap_or_else(|| view.replica_id(cx));
1795
1796 selections.push((
1797 local_replica_id,
1798 local_selections
1799 .into_iter()
1800 .map(|selection| {
1801 SelectionLayout::new(
1802 selection,
1803 view.selections.line_mode,
1804 view.cursor_shape,
1805 &display_map,
1806 )
1807 })
1808 .collect(),
1809 ));
1810 }
1811
1812 show_scrollbars = view.scroll_manager.scrollbars_visible();
1813 include_root = view
1814 .project
1815 .as_ref()
1816 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1817 .unwrap_or_default()
1818 });
1819
1820 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1821 .into_iter()
1822 .map(|(id, fold)| {
1823 let color = self
1824 .style
1825 .folds
1826 .ellipses
1827 .background
1828 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1829 .color;
1830
1831 (id, fold, color)
1832 })
1833 .collect();
1834
1835 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
1836 start_row..end_row,
1837 &active_rows,
1838 is_singleton,
1839 &snapshot,
1840 cx,
1841 );
1842
1843 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1844
1845 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1846
1847 let mut max_visible_line_width = 0.0;
1848 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1849 for line in &line_layouts {
1850 if line.width() > max_visible_line_width {
1851 max_visible_line_width = line.width();
1852 }
1853 }
1854
1855 let style = self.style.clone();
1856 let longest_line_width = layout_line(
1857 snapshot.longest_row(),
1858 &snapshot,
1859 &style,
1860 cx.text_layout_cache(),
1861 )
1862 .width();
1863 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1864 let em_width = style.text.em_width(cx.font_cache());
1865 let (scroll_width, blocks) = self.layout_blocks(
1866 start_row..end_row,
1867 &snapshot,
1868 size.x(),
1869 scroll_width,
1870 gutter_padding,
1871 gutter_width,
1872 em_width,
1873 gutter_width + gutter_margin,
1874 line_height,
1875 &style,
1876 &line_layouts,
1877 include_root,
1878 editor,
1879 cx,
1880 );
1881
1882 let scroll_max = vec2f(
1883 ((scroll_width - text_size.x()) / em_width).max(0.0),
1884 max_row as f32,
1885 );
1886
1887 self.update_view(cx, |view, cx| {
1888 let clamped = view.scroll_manager.clamp_scroll_left(scroll_max.x());
1889
1890 let autoscrolled = if autoscroll_horizontally {
1891 view.autoscroll_horizontally(
1892 start_row,
1893 text_size.x(),
1894 scroll_width,
1895 em_width,
1896 &line_layouts,
1897 cx,
1898 )
1899 } else {
1900 false
1901 };
1902
1903 if clamped || autoscrolled {
1904 snapshot = view.snapshot(cx);
1905 }
1906 });
1907
1908 let mut context_menu = None;
1909 let mut code_actions_indicator = None;
1910 let mut hover = None;
1911 let mut mode = EditorMode::Full;
1912 let mut fold_indicators = {
1913 let newest_selection_head = editor
1914 .selections
1915 .newest::<usize>(cx)
1916 .head()
1917 .to_display_point(&snapshot);
1918
1919 let style = editor.style(cx);
1920 if (start_row..end_row).contains(&newest_selection_head.row()) {
1921 if editor.context_menu_visible() {
1922 context_menu =
1923 editor.render_context_menu(newest_selection_head, style.clone(), cx);
1924 }
1925
1926 let active = matches!(
1927 editor.context_menu,
1928 Some(crate::ContextMenu::CodeActions(_))
1929 );
1930
1931 code_actions_indicator = editor
1932 .render_code_actions_indicator(&style, active, cx)
1933 .map(|indicator| (newest_selection_head.row(), indicator));
1934 }
1935
1936 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1937 hover = editor
1938 .hover_state
1939 .render(&snapshot, &style, visible_rows, cx);
1940 mode = editor.mode;
1941
1942 editor.render_fold_indicators(
1943 fold_statuses,
1944 &style,
1945 editor.gutter_hovered,
1946 line_height,
1947 gutter_margin,
1948 cx,
1949 )
1950 };
1951
1952 if let Some((_, context_menu)) = context_menu.as_mut() {
1953 context_menu.layout(
1954 SizeConstraint {
1955 min: Vector2F::zero(),
1956 max: vec2f(
1957 cx.window_size().x() * 0.7,
1958 (12. * line_height).min((size.y() - line_height) / 2.),
1959 ),
1960 },
1961 editor,
1962 cx,
1963 );
1964 }
1965
1966 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1967 indicator.layout(
1968 SizeConstraint::strict_along(
1969 Axis::Vertical,
1970 line_height * style.code_actions.vertical_scale,
1971 ),
1972 editor,
1973 cx,
1974 );
1975 }
1976
1977 for fold_indicator in fold_indicators.iter_mut() {
1978 if let Some(indicator) = fold_indicator.as_mut() {
1979 indicator.layout(
1980 SizeConstraint::strict_along(
1981 Axis::Vertical,
1982 line_height * style.code_actions.vertical_scale,
1983 ),
1984 editor,
1985 cx,
1986 );
1987 }
1988 }
1989
1990 if let Some((_, hover_popovers)) = hover.as_mut() {
1991 for hover_popover in hover_popovers.iter_mut() {
1992 hover_popover.layout(
1993 SizeConstraint {
1994 min: Vector2F::zero(),
1995 max: vec2f(
1996 (120. * em_width) // Default size
1997 .min(size.x() / 2.) // Shrink to half of the editor width
1998 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1999 (16. * line_height) // Default size
2000 .min(size.y() / 2.) // Shrink to half of the editor height
2001 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2002 ),
2003 },
2004 editor,
2005 cx,
2006 );
2007 }
2008 }
2009
2010 (
2011 size,
2012 LayoutState {
2013 mode,
2014 position_map: Arc::new(PositionMap {
2015 size,
2016 scroll_max,
2017 line_layouts,
2018 line_height,
2019 em_width,
2020 em_advance,
2021 snapshot,
2022 }),
2023 visible_display_row_range: start_row..end_row,
2024 gutter_size,
2025 gutter_padding,
2026 text_size,
2027 scrollbar_row_range,
2028 show_scrollbars,
2029 max_row,
2030 gutter_margin,
2031 active_rows,
2032 highlighted_rows,
2033 highlighted_ranges,
2034 fold_ranges,
2035 line_number_layouts,
2036 display_hunks,
2037 blocks,
2038 selections,
2039 context_menu,
2040 code_actions_indicator,
2041 fold_indicators,
2042 hover_popovers: hover,
2043 },
2044 )
2045 }
2046
2047 fn paint(
2048 &mut self,
2049 scene: &mut SceneBuilder,
2050 bounds: RectF,
2051 visible_bounds: RectF,
2052 layout: &mut Self::LayoutState,
2053 editor: &mut Editor,
2054 cx: &mut ViewContext<Editor>,
2055 ) -> Self::PaintState {
2056 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2057 scene.push_layer(Some(visible_bounds));
2058
2059 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2060 let text_bounds = RectF::new(
2061 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2062 layout.text_size,
2063 );
2064
2065 Self::attach_mouse_handlers(
2066 scene,
2067 &self.view,
2068 &layout.position_map,
2069 layout.hover_popovers.is_some(),
2070 visible_bounds,
2071 text_bounds,
2072 gutter_bounds,
2073 bounds,
2074 cx,
2075 );
2076
2077 self.paint_background(scene, gutter_bounds, text_bounds, layout, cx);
2078 if layout.gutter_size.x() > 0. {
2079 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2080 }
2081 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2082
2083 scene.push_layer(Some(bounds));
2084 if !layout.blocks.is_empty() {
2085 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2086 }
2087 self.paint_scrollbar(scene, bounds, layout, cx);
2088 scene.pop_layer();
2089
2090 scene.pop_layer();
2091 }
2092
2093 fn rect_for_text_range(
2094 &self,
2095 range_utf16: Range<usize>,
2096 bounds: RectF,
2097 _: RectF,
2098 layout: &Self::LayoutState,
2099 _: &Self::PaintState,
2100 _: &Editor,
2101 _: &ViewContext<Editor>,
2102 ) -> Option<RectF> {
2103 let text_bounds = RectF::new(
2104 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2105 layout.text_size,
2106 );
2107 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2108 let scroll_position = layout.position_map.snapshot.scroll_position();
2109 let start_row = scroll_position.y() as u32;
2110 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2111 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2112
2113 let range_start = OffsetUtf16(range_utf16.start)
2114 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2115 if range_start.row() < start_row {
2116 return None;
2117 }
2118
2119 let line = layout
2120 .position_map
2121 .line_layouts
2122 .get((range_start.row() - start_row) as usize)?;
2123 let range_start_x = line.x_for_index(range_start.column() as usize);
2124 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2125 Some(RectF::new(
2126 content_origin
2127 + vec2f(
2128 range_start_x,
2129 range_start_y + layout.position_map.line_height,
2130 )
2131 - vec2f(scroll_left, scroll_top),
2132 vec2f(
2133 layout.position_map.em_width,
2134 layout.position_map.line_height,
2135 ),
2136 ))
2137 }
2138
2139 fn debug(
2140 &self,
2141 bounds: RectF,
2142 _: &Self::LayoutState,
2143 _: &Self::PaintState,
2144 _: &Editor,
2145 _: &ViewContext<Editor>,
2146 ) -> json::Value {
2147 json!({
2148 "type": "BufferElement",
2149 "bounds": bounds.to_json()
2150 })
2151 }
2152}
2153
2154type BufferRow = u32;
2155
2156pub struct LayoutState {
2157 position_map: Arc<PositionMap>,
2158 gutter_size: Vector2F,
2159 gutter_padding: f32,
2160 gutter_margin: f32,
2161 text_size: Vector2F,
2162 mode: EditorMode,
2163 visible_display_row_range: Range<u32>,
2164 active_rows: BTreeMap<u32, bool>,
2165 highlighted_rows: Option<Range<u32>>,
2166 line_number_layouts: Vec<Option<text_layout::Line>>,
2167 display_hunks: Vec<DisplayDiffHunk>,
2168 blocks: Vec<BlockLayout>,
2169 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2170 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2171 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2172 scrollbar_row_range: Range<f32>,
2173 show_scrollbars: bool,
2174 max_row: u32,
2175 context_menu: Option<(DisplayPoint, Element<Editor>)>,
2176 code_actions_indicator: Option<(u32, Element<Editor>)>,
2177 hover_popovers: Option<(DisplayPoint, Vec<Element<Editor>>)>,
2178 fold_indicators: Vec<Option<Element<Editor>>>,
2179}
2180
2181pub struct PositionMap {
2182 size: Vector2F,
2183 line_height: f32,
2184 scroll_max: Vector2F,
2185 em_width: f32,
2186 em_advance: f32,
2187 line_layouts: Vec<text_layout::Line>,
2188 snapshot: EditorSnapshot,
2189}
2190
2191impl PositionMap {
2192 /// Returns two display points:
2193 /// 1. The nearest *valid* position in the editor
2194 /// 2. An unclipped, potentially *invalid* position that maps directly to
2195 /// the given pixel position.
2196 fn point_for_position(
2197 &self,
2198 text_bounds: RectF,
2199 position: Vector2F,
2200 ) -> (DisplayPoint, DisplayPoint) {
2201 let scroll_position = self.snapshot.scroll_position();
2202 let position = position - text_bounds.origin();
2203 let y = position.y().max(0.0).min(self.size.y());
2204 let x = position.x() + (scroll_position.x() * self.em_width);
2205 let row = (y / self.line_height + scroll_position.y()) as u32;
2206 let (column, x_overshoot) = if let Some(line) = self
2207 .line_layouts
2208 .get(row as usize - scroll_position.y() as usize)
2209 {
2210 if let Some(ix) = line.index_for_x(x) {
2211 (ix as u32, 0.0)
2212 } else {
2213 (line.len() as u32, 0f32.max(x - line.width()))
2214 }
2215 } else {
2216 (0, x)
2217 };
2218
2219 let mut target_point = DisplayPoint::new(row, column);
2220 let point = self.snapshot.clip_point(target_point, Bias::Left);
2221 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2222
2223 (point, target_point)
2224 }
2225}
2226
2227struct BlockLayout {
2228 row: u32,
2229 element: Element<Editor>,
2230 style: BlockStyle,
2231}
2232
2233fn layout_line(
2234 row: u32,
2235 snapshot: &EditorSnapshot,
2236 style: &EditorStyle,
2237 layout_cache: &TextLayoutCache,
2238) -> text_layout::Line {
2239 let mut line = snapshot.line(row);
2240
2241 if line.len() > MAX_LINE_LEN {
2242 let mut len = MAX_LINE_LEN;
2243 while !line.is_char_boundary(len) {
2244 len -= 1;
2245 }
2246
2247 line.truncate(len);
2248 }
2249
2250 layout_cache.layout_str(
2251 &line,
2252 style.text.font_size,
2253 &[(
2254 snapshot.line_len(row) as usize,
2255 RunStyle {
2256 font_id: style.text.font_id,
2257 color: Color::black(),
2258 underline: Default::default(),
2259 },
2260 )],
2261 )
2262}
2263
2264#[derive(Debug)]
2265pub struct Cursor {
2266 origin: Vector2F,
2267 block_width: f32,
2268 line_height: f32,
2269 color: Color,
2270 shape: CursorShape,
2271 block_text: Option<Line>,
2272}
2273
2274impl Cursor {
2275 pub fn new(
2276 origin: Vector2F,
2277 block_width: f32,
2278 line_height: f32,
2279 color: Color,
2280 shape: CursorShape,
2281 block_text: Option<Line>,
2282 ) -> Cursor {
2283 Cursor {
2284 origin,
2285 block_width,
2286 line_height,
2287 color,
2288 shape,
2289 block_text,
2290 }
2291 }
2292
2293 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2294 RectF::new(
2295 self.origin + origin,
2296 vec2f(self.block_width, self.line_height),
2297 )
2298 }
2299
2300 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2301 let bounds = match self.shape {
2302 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2303 CursorShape::Block | CursorShape::Hollow => RectF::new(
2304 self.origin + origin,
2305 vec2f(self.block_width, self.line_height),
2306 ),
2307 CursorShape::Underscore => RectF::new(
2308 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2309 vec2f(self.block_width, 2.0),
2310 ),
2311 };
2312
2313 //Draw background or border quad
2314 if matches!(self.shape, CursorShape::Hollow) {
2315 scene.push_quad(Quad {
2316 bounds,
2317 background: None,
2318 border: Border::all(1., self.color),
2319 corner_radius: 0.,
2320 });
2321 } else {
2322 scene.push_quad(Quad {
2323 bounds,
2324 background: Some(self.color),
2325 border: Default::default(),
2326 corner_radius: 0.,
2327 });
2328 }
2329
2330 if let Some(block_text) = &self.block_text {
2331 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2332 }
2333 }
2334
2335 pub fn shape(&self) -> CursorShape {
2336 self.shape
2337 }
2338}
2339
2340#[derive(Debug)]
2341pub struct HighlightedRange {
2342 pub start_y: f32,
2343 pub line_height: f32,
2344 pub lines: Vec<HighlightedRangeLine>,
2345 pub color: Color,
2346 pub corner_radius: f32,
2347}
2348
2349#[derive(Debug)]
2350pub struct HighlightedRangeLine {
2351 pub start_x: f32,
2352 pub end_x: f32,
2353}
2354
2355impl HighlightedRange {
2356 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2357 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2358 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2359 self.paint_lines(
2360 self.start_y + self.line_height,
2361 &self.lines[1..],
2362 bounds,
2363 scene,
2364 );
2365 } else {
2366 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2367 }
2368 }
2369
2370 fn paint_lines(
2371 &self,
2372 start_y: f32,
2373 lines: &[HighlightedRangeLine],
2374 bounds: RectF,
2375 scene: &mut SceneBuilder,
2376 ) {
2377 if lines.is_empty() {
2378 return;
2379 }
2380
2381 let mut path = PathBuilder::new();
2382 let first_line = lines.first().unwrap();
2383 let last_line = lines.last().unwrap();
2384
2385 let first_top_left = vec2f(first_line.start_x, start_y);
2386 let first_top_right = vec2f(first_line.end_x, start_y);
2387
2388 let curve_height = vec2f(0., self.corner_radius);
2389 let curve_width = |start_x: f32, end_x: f32| {
2390 let max = (end_x - start_x) / 2.;
2391 let width = if max < self.corner_radius {
2392 max
2393 } else {
2394 self.corner_radius
2395 };
2396
2397 vec2f(width, 0.)
2398 };
2399
2400 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2401 path.reset(first_top_right - top_curve_width);
2402 path.curve_to(first_top_right + curve_height, first_top_right);
2403
2404 let mut iter = lines.iter().enumerate().peekable();
2405 while let Some((ix, line)) = iter.next() {
2406 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2407
2408 if let Some((_, next_line)) = iter.peek() {
2409 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2410
2411 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2412 Ordering::Equal => {
2413 path.line_to(bottom_right);
2414 }
2415 Ordering::Less => {
2416 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2417 path.line_to(bottom_right - curve_height);
2418 if self.corner_radius > 0. {
2419 path.curve_to(bottom_right - curve_width, bottom_right);
2420 }
2421 path.line_to(next_top_right + curve_width);
2422 if self.corner_radius > 0. {
2423 path.curve_to(next_top_right + curve_height, next_top_right);
2424 }
2425 }
2426 Ordering::Greater => {
2427 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2428 path.line_to(bottom_right - curve_height);
2429 if self.corner_radius > 0. {
2430 path.curve_to(bottom_right + curve_width, bottom_right);
2431 }
2432 path.line_to(next_top_right - curve_width);
2433 if self.corner_radius > 0. {
2434 path.curve_to(next_top_right + curve_height, next_top_right);
2435 }
2436 }
2437 }
2438 } else {
2439 let curve_width = curve_width(line.start_x, line.end_x);
2440 path.line_to(bottom_right - curve_height);
2441 if self.corner_radius > 0. {
2442 path.curve_to(bottom_right - curve_width, bottom_right);
2443 }
2444
2445 let bottom_left = vec2f(line.start_x, bottom_right.y());
2446 path.line_to(bottom_left + curve_width);
2447 if self.corner_radius > 0. {
2448 path.curve_to(bottom_left - curve_height, bottom_left);
2449 }
2450 }
2451 }
2452
2453 if first_line.start_x > last_line.start_x {
2454 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2455 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2456 path.line_to(second_top_left + curve_height);
2457 if self.corner_radius > 0. {
2458 path.curve_to(second_top_left + curve_width, second_top_left);
2459 }
2460 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2461 path.line_to(first_bottom_left - curve_width);
2462 if self.corner_radius > 0. {
2463 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2464 }
2465 }
2466
2467 path.line_to(first_top_left + curve_height);
2468 if self.corner_radius > 0. {
2469 path.curve_to(first_top_left + top_curve_width, first_top_left);
2470 }
2471 path.line_to(first_top_right - top_curve_width);
2472
2473 scene.push_path(path.build(self.color, Some(bounds)));
2474 }
2475}
2476
2477pub fn position_to_display_point(
2478 position: Vector2F,
2479 text_bounds: RectF,
2480 position_map: &PositionMap,
2481) -> Option<DisplayPoint> {
2482 if text_bounds.contains_point(position) {
2483 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2484 if point == target_point {
2485 Some(point)
2486 } else {
2487 None
2488 }
2489 } else {
2490 None
2491 }
2492}
2493
2494pub fn range_to_bounds(
2495 range: &Range<DisplayPoint>,
2496 content_origin: Vector2F,
2497 scroll_left: f32,
2498 scroll_top: f32,
2499 visible_row_range: &Range<u32>,
2500 line_end_overshoot: f32,
2501 position_map: &PositionMap,
2502) -> impl Iterator<Item = RectF> {
2503 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2504
2505 if range.start == range.end {
2506 return bounds.into_iter();
2507 }
2508
2509 let start_row = visible_row_range.start;
2510 let end_row = visible_row_range.end;
2511
2512 let row_range = if range.end.column() == 0 {
2513 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2514 } else {
2515 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2516 };
2517
2518 let first_y =
2519 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2520
2521 for (idx, row) in row_range.enumerate() {
2522 let line_layout = &position_map.line_layouts[(row - start_row) as usize];
2523
2524 let start_x = if row == range.start.row() {
2525 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2526 - scroll_left
2527 } else {
2528 content_origin.x() - scroll_left
2529 };
2530
2531 let end_x = if row == range.end.row() {
2532 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2533 } else {
2534 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2535 };
2536
2537 bounds.push(RectF::from_points(
2538 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2539 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2540 ))
2541 }
2542
2543 bounds.into_iter()
2544}
2545
2546pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2547 delta.powf(1.5) / 100.0
2548}
2549
2550fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2551 delta.powf(1.2) / 300.0
2552}
2553
2554#[cfg(test)]
2555mod tests {
2556 use std::sync::Arc;
2557
2558 use super::*;
2559 use crate::{
2560 display_map::{BlockDisposition, BlockProperties},
2561 Editor, MultiBuffer,
2562 };
2563 use settings::Settings;
2564 use util::test::sample_text;
2565
2566 #[gpui::test]
2567 fn test_layout_line_numbers(cx: &mut gpui::AppContext) {
2568 cx.set_global(Settings::test(cx));
2569 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2570 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2571 Editor::new(EditorMode::Full, buffer, None, None, cx)
2572 });
2573 let element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2574
2575 let layouts = editor.update(cx, |editor, cx| {
2576 let snapshot = editor.snapshot(cx);
2577 element
2578 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2579 .0
2580 });
2581 assert_eq!(layouts.len(), 6);
2582 }
2583
2584 #[gpui::test]
2585 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::AppContext) {
2586 cx.set_global(Settings::test(cx));
2587 let buffer = MultiBuffer::build_simple("", cx);
2588 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2589 Editor::new(EditorMode::Full, buffer, None, None, cx)
2590 });
2591
2592 editor.update(cx, |editor, cx| {
2593 editor.set_placeholder_text("hello", cx);
2594 editor.insert_blocks(
2595 [BlockProperties {
2596 style: BlockStyle::Fixed,
2597 disposition: BlockDisposition::Above,
2598 height: 3,
2599 position: Anchor::min(),
2600 render: Arc::new(|_| Empty::new().boxed()),
2601 }],
2602 cx,
2603 );
2604
2605 // Blur the editor so that it displays placeholder text.
2606 cx.blur();
2607 });
2608
2609 let mut element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2610 let (size, mut state) = editor.update(cx, |editor, cx| {
2611 element.layout(
2612 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2613 editor,
2614 cx,
2615 )
2616 });
2617
2618 assert_eq!(state.position_map.line_layouts.len(), 4);
2619 assert_eq!(
2620 state
2621 .line_number_layouts
2622 .iter()
2623 .map(Option::is_some)
2624 .collect::<Vec<_>>(),
2625 &[false, false, false, true]
2626 );
2627
2628 // Don't panic.
2629 let mut scene = SceneBuilder::new(1.0);
2630 let bounds = RectF::new(Default::default(), size);
2631 editor.update(cx, |editor, cx| {
2632 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2633 });
2634 }
2635}