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
53enum FoldMarkers {}
54
55struct SelectionLayout {
56 head: DisplayPoint,
57 cursor_shape: CursorShape,
58 range: Range<DisplayPoint>,
59}
60
61impl SelectionLayout {
62 fn new<T: ToPoint + ToDisplayPoint + Clone>(
63 selection: Selection<T>,
64 line_mode: bool,
65 cursor_shape: CursorShape,
66 map: &DisplaySnapshot,
67 ) -> Self {
68 if line_mode {
69 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
70 let point_range = map.expand_to_line(selection.range());
71 Self {
72 head: selection.head().to_display_point(map),
73 cursor_shape,
74 range: point_range.start.to_display_point(map)
75 ..point_range.end.to_display_point(map),
76 }
77 } else {
78 let selection = selection.map(|p| p.to_display_point(map));
79 Self {
80 head: selection.head(),
81 cursor_shape,
82 range: selection.range(),
83 }
84 }
85 }
86}
87
88#[derive(Clone)]
89pub struct EditorElement {
90 view: WeakViewHandle<Editor>,
91 style: Arc<EditorStyle>,
92}
93
94impl EditorElement {
95 pub fn new(view: WeakViewHandle<Editor>, style: EditorStyle) -> Self {
96 Self {
97 view,
98 style: Arc::new(style),
99 }
100 }
101
102 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
103 self.view.upgrade(cx).unwrap().read(cx)
104 }
105
106 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
107 where
108 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
109 {
110 self.view.upgrade(cx).unwrap().update(cx, f)
111 }
112
113 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
114 self.update_view(cx, |view, cx| view.snapshot(cx))
115 }
116
117 fn attach_mouse_handlers(
118 view: &WeakViewHandle<Editor>,
119 position_map: &Arc<PositionMap>,
120 has_popovers: bool,
121 visible_bounds: RectF,
122 text_bounds: RectF,
123 gutter_bounds: RectF,
124 bounds: RectF,
125 cx: &mut PaintContext,
126 ) {
127 enum EditorElementMouseHandlers {}
128 cx.scene.push_mouse_region(
129 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
130 .on_down(MouseButton::Left, {
131 let position_map = position_map.clone();
132 move |e, cx| {
133 if !Self::mouse_down(
134 e.platform_event,
135 position_map.as_ref(),
136 text_bounds,
137 gutter_bounds,
138 cx,
139 ) {
140 cx.propagate_event();
141 }
142 }
143 })
144 .on_down(MouseButton::Right, {
145 let position_map = position_map.clone();
146 move |e, cx| {
147 if !Self::mouse_right_down(
148 e.position,
149 position_map.as_ref(),
150 text_bounds,
151 cx,
152 ) {
153 cx.propagate_event();
154 }
155 }
156 })
157 .on_up(MouseButton::Left, {
158 let view = view.clone();
159 let position_map = position_map.clone();
160 move |e, cx| {
161 if !Self::mouse_up(
162 view.clone(),
163 e.position,
164 e.cmd,
165 e.shift,
166 position_map.as_ref(),
167 text_bounds,
168 cx,
169 ) {
170 cx.propagate_event()
171 }
172 }
173 })
174 .on_drag(MouseButton::Left, {
175 let view = view.clone();
176 let position_map = position_map.clone();
177 move |e, cx| {
178 if !Self::mouse_dragged(
179 view.clone(),
180 e.platform_event,
181 position_map.as_ref(),
182 text_bounds,
183 cx,
184 ) {
185 cx.propagate_event()
186 }
187 }
188 })
189 .on_move({
190 let position_map = position_map.clone();
191 move |e, cx| {
192 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
193 cx.propagate_event()
194 }
195 }
196 })
197 .on_move_out(move |_, cx| {
198 if has_popovers {
199 cx.dispatch_action(HideHover);
200 }
201 })
202 .on_scroll({
203 let position_map = position_map.clone();
204 move |e, cx| {
205 if !Self::scroll(
206 e.position,
207 *e.delta.raw(),
208 e.delta.precise(),
209 &position_map,
210 bounds,
211 cx,
212 ) {
213 cx.propagate_event()
214 }
215 }
216 }),
217 );
218
219 enum GutterHandlers {}
220 cx.scene.push_mouse_region(
221 MouseRegion::new::<GutterHandlers>(view.id(), view.id() + 1, gutter_bounds).on_hover(
222 |hover, cx| {
223 cx.dispatch_action(GutterHover {
224 hovered: hover.started,
225 })
226 },
227 ),
228 )
229 }
230
231 fn mouse_down(
232 MouseButtonEvent {
233 position,
234 modifiers:
235 Modifiers {
236 shift,
237 ctrl,
238 alt,
239 cmd,
240 ..
241 },
242 mut click_count,
243 ..
244 }: MouseButtonEvent,
245 position_map: &PositionMap,
246 text_bounds: RectF,
247 gutter_bounds: RectF,
248 cx: &mut EventContext,
249 ) -> bool {
250 if gutter_bounds.contains_point(position) {
251 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
252 } else if !text_bounds.contains_point(position) {
253 return false;
254 }
255
256 let (position, target_position) = position_map.point_for_position(text_bounds, position);
257
258 if shift && alt {
259 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
260 position,
261 goal_column: target_position.column(),
262 }));
263 } else if shift && !ctrl && !alt && !cmd {
264 cx.dispatch_action(Select(SelectPhase::Extend {
265 position,
266 click_count,
267 }));
268 } else {
269 cx.dispatch_action(Select(SelectPhase::Begin {
270 position,
271 add: alt,
272 click_count,
273 }));
274 }
275
276 true
277 }
278
279 fn mouse_right_down(
280 position: Vector2F,
281 position_map: &PositionMap,
282 text_bounds: RectF,
283 cx: &mut EventContext,
284 ) -> bool {
285 if !text_bounds.contains_point(position) {
286 return false;
287 }
288
289 let (point, _) = position_map.point_for_position(text_bounds, position);
290
291 cx.dispatch_action(DeployMouseContextMenu { position, point });
292 true
293 }
294
295 fn mouse_up(
296 view: WeakViewHandle<Editor>,
297 position: Vector2F,
298 cmd: bool,
299 shift: bool,
300 position_map: &PositionMap,
301 text_bounds: RectF,
302 cx: &mut EventContext,
303 ) -> bool {
304 let view = view.upgrade(cx.app).unwrap().read(cx.app);
305 let end_selection = view.has_pending_selection();
306 let pending_nonempty_selections = view.has_pending_nonempty_selection();
307
308 if end_selection {
309 cx.dispatch_action(Select(SelectPhase::End));
310 }
311
312 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
313 let (point, target_point) = position_map.point_for_position(text_bounds, position);
314
315 if point == target_point {
316 if shift {
317 cx.dispatch_action(GoToFetchedTypeDefinition { point });
318 } else {
319 cx.dispatch_action(GoToFetchedDefinition { point });
320 }
321
322 return true;
323 }
324 }
325
326 end_selection
327 }
328
329 fn mouse_dragged(
330 view: WeakViewHandle<Editor>,
331 MouseMovedEvent {
332 modifiers: Modifiers { cmd, shift, .. },
333 position,
334 ..
335 }: MouseMovedEvent,
336 position_map: &PositionMap,
337 text_bounds: RectF,
338 cx: &mut EventContext,
339 ) -> bool {
340 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
341 // Don't trigger hover popover if mouse is hovering over context menu
342 let point = if text_bounds.contains_point(position) {
343 let (point, target_point) = position_map.point_for_position(text_bounds, position);
344 if point == target_point {
345 Some(point)
346 } else {
347 None
348 }
349 } else {
350 None
351 };
352
353 cx.dispatch_action(UpdateGoToDefinitionLink {
354 point,
355 cmd_held: cmd,
356 shift_held: shift,
357 });
358
359 let view = view.upgrade(cx.app).unwrap().read(cx.app);
360 if view.has_pending_selection() {
361 let mut scroll_delta = Vector2F::zero();
362
363 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
364 let top = text_bounds.origin_y() + vertical_margin;
365 let bottom = text_bounds.lower_left().y() - vertical_margin;
366 if position.y() < top {
367 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
368 }
369 if position.y() > bottom {
370 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
371 }
372
373 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
374 let left = text_bounds.origin_x() + horizontal_margin;
375 let right = text_bounds.upper_right().x() - horizontal_margin;
376 if position.x() < left {
377 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
378 left - position.x(),
379 ))
380 }
381 if position.x() > right {
382 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
383 position.x() - right,
384 ))
385 }
386
387 let (position, target_position) =
388 position_map.point_for_position(text_bounds, position);
389
390 cx.dispatch_action(Select(SelectPhase::Update {
391 position,
392 goal_column: target_position.column(),
393 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
394 .clamp(Vector2F::zero(), position_map.scroll_max),
395 }));
396
397 cx.dispatch_action(HoverAt { point });
398 true
399 } else {
400 cx.dispatch_action(HoverAt { point });
401 false
402 }
403 }
404
405 fn mouse_moved(
406 MouseMovedEvent {
407 modifiers: Modifiers { shift, cmd, .. },
408 position,
409 ..
410 }: MouseMovedEvent,
411 position_map: &PositionMap,
412 text_bounds: RectF,
413 cx: &mut EventContext,
414 ) -> bool {
415 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
416 // Don't trigger hover popover if mouse is hovering over context menu
417 let point = position_to_display_point(position, text_bounds, position_map);
418
419 cx.dispatch_action(UpdateGoToDefinitionLink {
420 point,
421 cmd_held: cmd,
422 shift_held: shift,
423 });
424
425 cx.dispatch_action(HoverAt { point });
426
427 true
428 }
429
430 fn scroll(
431 position: Vector2F,
432 mut delta: Vector2F,
433 precise: bool,
434 position_map: &PositionMap,
435 bounds: RectF,
436 cx: &mut EventContext,
437 ) -> bool {
438 if !bounds.contains_point(position) {
439 return false;
440 }
441
442 let line_height = position_map.line_height;
443 let max_glyph_width = position_map.em_width;
444
445 let axis = if precise {
446 //Trackpad
447 position_map.snapshot.ongoing_scroll.filter(&mut delta)
448 } else {
449 //Not trackpad
450 delta *= vec2f(max_glyph_width, line_height);
451 None //Resets ongoing scroll
452 };
453
454 let scroll_position = position_map.snapshot.scroll_position();
455 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
456 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
457 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
458
459 cx.dispatch_action(Scroll {
460 scroll_position,
461 axis,
462 });
463
464 true
465 }
466
467 fn paint_background(
468 &self,
469 gutter_bounds: RectF,
470 text_bounds: RectF,
471 layout: &LayoutState,
472 cx: &mut PaintContext,
473 ) {
474 let bounds = gutter_bounds.union_rect(text_bounds);
475 let scroll_top =
476 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
477 cx.scene.push_quad(Quad {
478 bounds: gutter_bounds,
479 background: Some(self.style.gutter_background),
480 border: Border::new(0., Color::transparent_black()),
481 corner_radius: 0.,
482 });
483 cx.scene.push_quad(Quad {
484 bounds: text_bounds,
485 background: Some(self.style.background),
486 border: Border::new(0., Color::transparent_black()),
487 corner_radius: 0.,
488 });
489
490 if let EditorMode::Full = layout.mode {
491 let mut active_rows = layout.active_rows.iter().peekable();
492 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
493 let mut end_row = *start_row;
494 while active_rows.peek().map_or(false, |r| {
495 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
496 }) {
497 active_rows.next().unwrap();
498 end_row += 1;
499 }
500
501 if !contains_non_empty_selection {
502 let origin = vec2f(
503 bounds.origin_x(),
504 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
505 - scroll_top,
506 );
507 let size = vec2f(
508 bounds.width(),
509 layout.position_map.line_height * (end_row - start_row + 1) as f32,
510 );
511 cx.scene.push_quad(Quad {
512 bounds: RectF::new(origin, size),
513 background: Some(self.style.active_line_background),
514 border: Border::default(),
515 corner_radius: 0.,
516 });
517 }
518 }
519
520 if let Some(highlighted_rows) = &layout.highlighted_rows {
521 let origin = vec2f(
522 bounds.origin_x(),
523 bounds.origin_y()
524 + (layout.position_map.line_height * highlighted_rows.start as f32)
525 - scroll_top,
526 );
527 let size = vec2f(
528 bounds.width(),
529 layout.position_map.line_height * highlighted_rows.len() as f32,
530 );
531 cx.scene.push_quad(Quad {
532 bounds: RectF::new(origin, size),
533 background: Some(self.style.highlighted_line_background),
534 border: Border::default(),
535 corner_radius: 0.,
536 });
537 }
538 }
539 }
540
541 fn paint_gutter(
542 &mut self,
543 bounds: RectF,
544 visible_bounds: RectF,
545 layout: &mut LayoutState,
546 cx: &mut PaintContext,
547 ) {
548 let line_height = layout.position_map.line_height;
549
550 let scroll_position = layout.position_map.snapshot.scroll_position();
551 let scroll_top = scroll_position.y() * line_height;
552
553 let show_gutter = matches!(
554 &cx.global::<Settings>()
555 .git_overrides
556 .git_gutter
557 .unwrap_or_default(),
558 GitGutter::TrackedFiles
559 );
560
561 if show_gutter {
562 Self::paint_diff_hunks(bounds, layout, cx);
563 }
564
565 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
566 if let Some(line) = line {
567 let line_origin = bounds.origin()
568 + vec2f(
569 bounds.width() - line.width() - layout.gutter_padding,
570 ix as f32 * line_height - (scroll_top % line_height),
571 );
572
573 line.paint(line_origin, visible_bounds, line_height, cx);
574 }
575 }
576
577 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
578 if let Some(indicator) = fold_indicator.as_mut() {
579 let position = vec2f(
580 bounds.width() - layout.gutter_padding,
581 ix as f32 * line_height - (scroll_top % line_height),
582 );
583 let centering_offset = vec2f(
584 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
585 (line_height - indicator.size().y()) / 2.,
586 );
587
588 let indicator_origin = bounds.origin() + position + centering_offset;
589
590 indicator.paint(indicator_origin, visible_bounds, cx);
591 }
592 }
593
594 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
595 let mut x = 0.;
596 let mut y = *row as f32 * line_height - scroll_top;
597 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
598 y += (line_height - indicator.size().y()) / 2.;
599 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
600 }
601 }
602
603 fn paint_diff_hunks(bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
604 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
605 let line_height = layout.position_map.line_height;
606
607 let scroll_position = layout.position_map.snapshot.scroll_position();
608 let scroll_top = scroll_position.y() * line_height;
609
610 for hunk in &layout.display_hunks {
611 let (display_row_range, status) = match hunk {
612 //TODO: This rendering is entirely a horrible hack
613 &DisplayDiffHunk::Folded { display_row: row } => {
614 let start_y = row as f32 * line_height - scroll_top;
615 let end_y = start_y + line_height;
616
617 let width = diff_style.removed_width_em * line_height;
618 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
619 let highlight_size = vec2f(width * 2., end_y - start_y);
620 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
621
622 cx.scene.push_quad(Quad {
623 bounds: highlight_bounds,
624 background: Some(diff_style.modified),
625 border: Border::new(0., Color::transparent_black()),
626 corner_radius: 1. * line_height,
627 });
628
629 continue;
630 }
631
632 DisplayDiffHunk::Unfolded {
633 display_row_range,
634 status,
635 } => (display_row_range, status),
636 };
637
638 let color = match status {
639 DiffHunkStatus::Added => diff_style.inserted,
640 DiffHunkStatus::Modified => diff_style.modified,
641
642 //TODO: This rendering is entirely a horrible hack
643 DiffHunkStatus::Removed => {
644 let row = *display_row_range.start();
645
646 let offset = line_height / 2.;
647 let start_y = row as f32 * line_height - offset - scroll_top;
648 let end_y = start_y + line_height;
649
650 let width = diff_style.removed_width_em * line_height;
651 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
652 let highlight_size = vec2f(width * 2., end_y - start_y);
653 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
654
655 cx.scene.push_quad(Quad {
656 bounds: highlight_bounds,
657 background: Some(diff_style.deleted),
658 border: Border::new(0., Color::transparent_black()),
659 corner_radius: 1. * line_height,
660 });
661
662 continue;
663 }
664 };
665
666 let start_row = *display_row_range.start();
667 let end_row = *display_row_range.end();
668
669 let start_y = start_row as f32 * line_height - scroll_top;
670 let end_y = end_row as f32 * line_height - scroll_top + line_height;
671
672 let width = diff_style.width_em * line_height;
673 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
674 let highlight_size = vec2f(width * 2., end_y - start_y);
675 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
676
677 cx.scene.push_quad(Quad {
678 bounds: highlight_bounds,
679 background: Some(color),
680 border: Border::new(0., Color::transparent_black()),
681 corner_radius: diff_style.corner_radius * line_height,
682 });
683 }
684 }
685
686 fn paint_text(
687 &mut self,
688 bounds: RectF,
689 visible_bounds: RectF,
690 layout: &mut LayoutState,
691 cx: &mut PaintContext,
692 ) {
693 let view = self.view(cx.app);
694 let style = &self.style;
695 let local_replica_id = view.replica_id(cx);
696 let scroll_position = layout.position_map.snapshot.scroll_position();
697 let start_row = layout.visible_display_row_range.start;
698 let scroll_top = scroll_position.y() * layout.position_map.line_height;
699 let max_glyph_width = layout.position_map.em_width;
700 let scroll_left = scroll_position.x() * max_glyph_width;
701 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
702 let line_end_overshoot = 0.15 * layout.position_map.line_height;
703
704 cx.scene.push_layer(Some(bounds));
705
706 cx.scene.push_cursor_region(CursorRegion {
707 bounds,
708 style: if !view.link_go_to_definition_state.definitions.is_empty() {
709 CursorStyle::PointingHand
710 } else {
711 CursorStyle::IBeam
712 },
713 });
714
715 let fold_corner_radius =
716 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
717 for (id, range, color) in layout.fold_ranges.iter() {
718 self.paint_highlighted_range(
719 range.clone(),
720 *color,
721 fold_corner_radius,
722 fold_corner_radius * 2.,
723 layout,
724 content_origin,
725 scroll_top,
726 scroll_left,
727 bounds,
728 cx,
729 );
730
731 for bound in range_to_bounds(
732 &range,
733 content_origin,
734 scroll_left,
735 scroll_top,
736 &layout.visible_display_row_range,
737 line_end_overshoot,
738 &layout.position_map,
739 ) {
740 cx.scene.push_cursor_region(CursorRegion {
741 bounds: bound,
742 style: CursorStyle::PointingHand,
743 });
744
745 let display_row = range.start.row();
746
747 let buffer_row = DisplayPoint::new(display_row, 0)
748 .to_point(&layout.position_map.snapshot.display_snapshot)
749 .row;
750
751 cx.scene.push_mouse_region(
752 MouseRegion::new::<FoldMarkers>(self.view.id(), *id as usize, bound)
753 .on_click(MouseButton::Left, move |_, cx| {
754 cx.dispatch_action(UnfoldAt { buffer_row })
755 })
756 .with_notify_on_hover(true)
757 .with_notify_on_click(true),
758 )
759 }
760 }
761
762 for (range, color) in &layout.highlighted_ranges {
763 self.paint_highlighted_range(
764 range.clone(),
765 *color,
766 0.,
767 line_end_overshoot,
768 layout,
769 content_origin,
770 scroll_top,
771 scroll_left,
772 bounds,
773 cx,
774 );
775 }
776
777 let mut cursors = SmallVec::<[Cursor; 32]>::new();
778 let corner_radius = 0.15 * layout.position_map.line_height;
779
780 for (replica_id, selections) in &layout.selections {
781 let selection_style = style.replica_selection_style(*replica_id);
782
783 for selection in selections {
784 self.paint_highlighted_range(
785 selection.range.clone(),
786 selection_style.selection,
787 corner_radius,
788 corner_radius * 2.,
789 layout,
790 content_origin,
791 scroll_top,
792 scroll_left,
793 bounds,
794 cx,
795 );
796
797 if view.show_local_cursors(cx) || *replica_id != local_replica_id {
798 let cursor_position = selection.head;
799 if layout
800 .visible_display_row_range
801 .contains(&cursor_position.row())
802 {
803 let cursor_row_layout = &layout.position_map.line_layouts
804 [(cursor_position.row() - start_row) as usize];
805 let cursor_column = cursor_position.column() as usize;
806
807 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
808 let mut block_width =
809 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
810 if block_width == 0.0 {
811 block_width = layout.position_map.em_width;
812 }
813 let block_text = if let CursorShape::Block = selection.cursor_shape {
814 layout
815 .position_map
816 .snapshot
817 .chars_at(cursor_position)
818 .next()
819 .and_then(|(character, _)| {
820 let font_id =
821 cursor_row_layout.font_for_index(cursor_column)?;
822 let text = character.to_string();
823
824 Some(cx.text_layout_cache.layout_str(
825 &text,
826 cursor_row_layout.font_size(),
827 &[(
828 text.len(),
829 RunStyle {
830 font_id,
831 color: style.background,
832 underline: Default::default(),
833 },
834 )],
835 ))
836 })
837 } else {
838 None
839 };
840
841 let x = cursor_character_x - scroll_left;
842 let y = cursor_position.row() as f32 * layout.position_map.line_height
843 - scroll_top;
844 cursors.push(Cursor {
845 color: selection_style.cursor,
846 block_width,
847 origin: vec2f(x, y),
848 line_height: layout.position_map.line_height,
849 shape: selection.cursor_shape,
850 block_text,
851 });
852 }
853 }
854 }
855 }
856
857 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
858 // Draw glyphs
859 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
860 let row = start_row + ix as u32;
861 line.paint(
862 content_origin
863 + vec2f(
864 -scroll_left,
865 row as f32 * layout.position_map.line_height - scroll_top,
866 ),
867 visible_text_bounds,
868 layout.position_map.line_height,
869 cx,
870 );
871 }
872 }
873
874 cx.scene.push_layer(Some(bounds));
875 for cursor in cursors {
876 cursor.paint(content_origin, cx);
877 }
878 cx.scene.pop_layer();
879
880 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
881 cx.scene.push_stacking_context(None, None);
882 let cursor_row_layout =
883 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
884 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
885 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
886 let mut list_origin = content_origin + vec2f(x, y);
887 let list_width = context_menu.size().x();
888 let list_height = context_menu.size().y();
889
890 // Snap the right edge of the list to the right edge of the window if
891 // its horizontal bounds overflow.
892 if list_origin.x() + list_width > cx.window_size.x() {
893 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
894 }
895
896 if list_origin.y() + list_height > bounds.max_y() {
897 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
898 }
899
900 context_menu.paint(
901 list_origin,
902 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
903 cx,
904 );
905
906 cx.scene.pop_stacking_context();
907 }
908
909 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
910 cx.scene.push_stacking_context(None, None);
911
912 // This is safe because we check on layout whether the required row is available
913 let hovered_row_layout =
914 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
915
916 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
917 // height. This is the size we will use to decide whether to render popovers above or below
918 // the hovered line.
919 let first_size = hover_popovers[0].size();
920 let height_to_reserve = first_size.y()
921 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
922
923 // Compute Hovered Point
924 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
925 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
926 let hovered_point = content_origin + vec2f(x, y);
927
928 if hovered_point.y() - height_to_reserve > 0.0 {
929 // There is enough space above. Render popovers above the hovered point
930 let mut current_y = hovered_point.y();
931 for hover_popover in hover_popovers {
932 let size = hover_popover.size();
933 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
934
935 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
936 if x_out_of_bounds < 0.0 {
937 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
938 }
939
940 hover_popover.paint(
941 popover_origin,
942 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
943 cx,
944 );
945
946 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
947 }
948 } else {
949 // There is not enough space above. Render popovers below the hovered point
950 let mut current_y = hovered_point.y() + layout.position_map.line_height;
951 for hover_popover in hover_popovers {
952 let size = hover_popover.size();
953 let mut popover_origin = vec2f(hovered_point.x(), current_y);
954
955 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
956 if x_out_of_bounds < 0.0 {
957 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
958 }
959
960 hover_popover.paint(
961 popover_origin,
962 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
963 cx,
964 );
965
966 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
967 }
968 }
969
970 cx.scene.pop_stacking_context();
971 }
972
973 cx.scene.pop_layer();
974 }
975
976 fn paint_scrollbar(&mut self, bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
977 enum ScrollbarMouseHandlers {}
978 if layout.mode != EditorMode::Full {
979 return;
980 }
981
982 let view = self.view.clone();
983 let style = &self.style.theme.scrollbar;
984
985 let top = bounds.min_y();
986 let bottom = bounds.max_y();
987 let right = bounds.max_x();
988 let left = right - style.width;
989 let row_range = &layout.scrollbar_row_range;
990 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
991
992 let mut height = bounds.height();
993 let mut first_row_y_offset = 0.0;
994
995 // Impose a minimum height on the scrollbar thumb
996 let min_thumb_height =
997 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
998 let thumb_height = (row_range.end - row_range.start) * height / max_row;
999 if thumb_height < min_thumb_height {
1000 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1001 height -= min_thumb_height - thumb_height;
1002 }
1003
1004 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1005
1006 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1007 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1008 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1009 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1010
1011 if layout.show_scrollbars {
1012 cx.scene.push_quad(Quad {
1013 bounds: track_bounds,
1014 border: style.track.border,
1015 background: style.track.background_color,
1016 ..Default::default()
1017 });
1018 cx.scene.push_quad(Quad {
1019 bounds: thumb_bounds,
1020 border: style.thumb.border,
1021 background: style.thumb.background_color,
1022 corner_radius: style.thumb.corner_radius,
1023 });
1024 }
1025
1026 cx.scene.push_cursor_region(CursorRegion {
1027 bounds: track_bounds,
1028 style: CursorStyle::Arrow,
1029 });
1030 cx.scene.push_mouse_region(
1031 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
1032 .on_move({
1033 let view = view.clone();
1034 move |_, cx| {
1035 if let Some(view) = view.upgrade(cx.deref_mut()) {
1036 view.update(cx.deref_mut(), |view, cx| {
1037 view.scroll_manager.show_scrollbar(cx);
1038 });
1039 }
1040 }
1041 })
1042 .on_down(MouseButton::Left, {
1043 let view = view.clone();
1044 let row_range = row_range.clone();
1045 move |e, cx| {
1046 let y = e.position.y();
1047 if let Some(view) = view.upgrade(cx.deref_mut()) {
1048 view.update(cx.deref_mut(), |view, cx| {
1049 if y < thumb_top || thumb_bottom < y {
1050 let center_row =
1051 ((y - top) * max_row as f32 / height).round() as u32;
1052 let top_row = center_row.saturating_sub(
1053 (row_range.end - row_range.start) as u32 / 2,
1054 );
1055 let mut position = view.scroll_position(cx);
1056 position.set_y(top_row as f32);
1057 view.set_scroll_position(position, cx);
1058 } else {
1059 view.scroll_manager.show_scrollbar(cx);
1060 }
1061 });
1062 }
1063 }
1064 })
1065 .on_drag(MouseButton::Left, {
1066 let view = view.clone();
1067 move |e, cx| {
1068 let y = e.prev_mouse_position.y();
1069 let new_y = e.position.y();
1070 if thumb_top < y && y < thumb_bottom {
1071 if let Some(view) = view.upgrade(cx.deref_mut()) {
1072 view.update(cx.deref_mut(), |view, cx| {
1073 let mut position = view.scroll_position(cx);
1074 position.set_y(
1075 position.y() + (new_y - y) * (max_row as f32) / height,
1076 );
1077 if position.y() < 0.0 {
1078 position.set_y(0.);
1079 }
1080 view.set_scroll_position(position, cx);
1081 });
1082 }
1083 }
1084 }
1085 }),
1086 );
1087 }
1088
1089 #[allow(clippy::too_many_arguments)]
1090 fn paint_highlighted_range(
1091 &self,
1092 range: Range<DisplayPoint>,
1093 color: Color,
1094 corner_radius: f32,
1095 line_end_overshoot: f32,
1096 layout: &LayoutState,
1097 content_origin: Vector2F,
1098 scroll_top: f32,
1099 scroll_left: f32,
1100 bounds: RectF,
1101 cx: &mut PaintContext,
1102 ) {
1103 let start_row = layout.visible_display_row_range.start;
1104 let end_row = layout.visible_display_row_range.end;
1105 if range.start != range.end {
1106 let row_range = if range.end.column() == 0 {
1107 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1108 } else {
1109 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1110 };
1111
1112 let highlighted_range = HighlightedRange {
1113 color,
1114 line_height: layout.position_map.line_height,
1115 corner_radius,
1116 start_y: content_origin.y()
1117 + row_range.start as f32 * layout.position_map.line_height
1118 - scroll_top,
1119 lines: row_range
1120 .into_iter()
1121 .map(|row| {
1122 let line_layout =
1123 &layout.position_map.line_layouts[(row - start_row) as usize];
1124 HighlightedRangeLine {
1125 start_x: if row == range.start.row() {
1126 content_origin.x()
1127 + line_layout.x_for_index(range.start.column() as usize)
1128 - scroll_left
1129 } else {
1130 content_origin.x() - scroll_left
1131 },
1132 end_x: if row == range.end.row() {
1133 content_origin.x()
1134 + line_layout.x_for_index(range.end.column() as usize)
1135 - scroll_left
1136 } else {
1137 content_origin.x() + line_layout.width() + line_end_overshoot
1138 - scroll_left
1139 },
1140 }
1141 })
1142 .collect(),
1143 };
1144
1145 highlighted_range.paint(bounds, cx.scene);
1146 }
1147 }
1148
1149 fn paint_blocks(
1150 &mut self,
1151 bounds: RectF,
1152 visible_bounds: RectF,
1153 layout: &mut LayoutState,
1154 cx: &mut PaintContext,
1155 ) {
1156 let scroll_position = layout.position_map.snapshot.scroll_position();
1157 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1158 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1159
1160 for block in &mut layout.blocks {
1161 let mut origin = bounds.origin()
1162 + vec2f(
1163 0.,
1164 block.row as f32 * layout.position_map.line_height - scroll_top,
1165 );
1166 if !matches!(block.style, BlockStyle::Sticky) {
1167 origin += vec2f(-scroll_left, 0.);
1168 }
1169 block.element.paint(origin, visible_bounds, cx);
1170 }
1171 }
1172
1173 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1174 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1175 let style = &self.style;
1176
1177 cx.text_layout_cache
1178 .layout_str(
1179 "1".repeat(digit_count).as_str(),
1180 style.text.font_size,
1181 &[(
1182 digit_count,
1183 RunStyle {
1184 font_id: style.text.font_id,
1185 color: Color::black(),
1186 underline: Default::default(),
1187 },
1188 )],
1189 )
1190 .width()
1191 }
1192
1193 //Folds contained in a hunk are ignored apart from shrinking visual size
1194 //If a fold contains any hunks then that fold line is marked as modified
1195 fn layout_git_gutters(
1196 &self,
1197 display_rows: Range<u32>,
1198 snapshot: &EditorSnapshot,
1199 ) -> Vec<DisplayDiffHunk> {
1200 let buffer_snapshot = &snapshot.buffer_snapshot;
1201
1202 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1203 .to_point(snapshot)
1204 .row;
1205 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1206 .to_point(snapshot)
1207 .row;
1208
1209 buffer_snapshot
1210 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1211 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1212 .dedup()
1213 .collect()
1214 }
1215
1216 fn layout_line_numbers(
1217 &self,
1218 rows: Range<u32>,
1219 active_rows: &BTreeMap<u32, bool>,
1220 is_singleton: bool,
1221 snapshot: &EditorSnapshot,
1222 cx: &LayoutContext,
1223 ) -> (
1224 Vec<Option<text_layout::Line>>,
1225 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1226 ) {
1227 let style = &self.style;
1228 let include_line_numbers = snapshot.mode == EditorMode::Full;
1229 let mut line_number_layouts = Vec::with_capacity(rows.len());
1230 let mut fold_statuses = Vec::with_capacity(rows.len());
1231 let mut line_number = String::new();
1232 for (ix, row) in snapshot
1233 .buffer_rows(rows.start)
1234 .take((rows.end - rows.start) as usize)
1235 .enumerate()
1236 {
1237 let display_row = rows.start + ix as u32;
1238 let (active, color) = if active_rows.contains_key(&display_row) {
1239 (true, style.line_number_active)
1240 } else {
1241 (false, style.line_number)
1242 };
1243 if let Some(buffer_row) = row {
1244 if include_line_numbers {
1245 line_number.clear();
1246 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1247 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1248 &line_number,
1249 style.text.font_size,
1250 &[(
1251 line_number.len(),
1252 RunStyle {
1253 font_id: style.text.font_id,
1254 color,
1255 underline: Default::default(),
1256 },
1257 )],
1258 )));
1259 fold_statuses.push(
1260 is_singleton
1261 .then(|| {
1262 snapshot
1263 .fold_for_line(buffer_row)
1264 .map(|fold_status| (fold_status, buffer_row, active))
1265 })
1266 .flatten(),
1267 )
1268 }
1269 } else {
1270 fold_statuses.push(None);
1271 line_number_layouts.push(None);
1272 }
1273 }
1274
1275 (line_number_layouts, fold_statuses)
1276 }
1277
1278 fn layout_lines(
1279 &mut self,
1280 rows: Range<u32>,
1281 snapshot: &EditorSnapshot,
1282 cx: &LayoutContext,
1283 ) -> Vec<text_layout::Line> {
1284 if rows.start >= rows.end {
1285 return Vec::new();
1286 }
1287
1288 // When the editor is empty and unfocused, then show the placeholder.
1289 if snapshot.is_empty() {
1290 let placeholder_style = self
1291 .style
1292 .placeholder_text
1293 .as_ref()
1294 .unwrap_or(&self.style.text);
1295 let placeholder_text = snapshot.placeholder_text();
1296 let placeholder_lines = placeholder_text
1297 .as_ref()
1298 .map_or("", AsRef::as_ref)
1299 .split('\n')
1300 .skip(rows.start as usize)
1301 .chain(iter::repeat(""))
1302 .take(rows.len());
1303 placeholder_lines
1304 .map(|line| {
1305 cx.text_layout_cache.layout_str(
1306 line,
1307 placeholder_style.font_size,
1308 &[(
1309 line.len(),
1310 RunStyle {
1311 font_id: placeholder_style.font_id,
1312 color: placeholder_style.color,
1313 underline: Default::default(),
1314 },
1315 )],
1316 )
1317 })
1318 .collect()
1319 } else {
1320 let style = &self.style;
1321 let chunks = snapshot
1322 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1323 .map(|chunk| {
1324 let mut highlight_style = chunk
1325 .syntax_highlight_id
1326 .and_then(|id| id.style(&style.syntax));
1327
1328 if let Some(chunk_highlight) = chunk.highlight_style {
1329 if let Some(highlight_style) = highlight_style.as_mut() {
1330 highlight_style.highlight(chunk_highlight);
1331 } else {
1332 highlight_style = Some(chunk_highlight);
1333 }
1334 }
1335
1336 let mut diagnostic_highlight = HighlightStyle::default();
1337
1338 if chunk.is_unnecessary {
1339 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1340 }
1341
1342 if let Some(severity) = chunk.diagnostic_severity {
1343 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1344 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1345 let diagnostic_style = super::diagnostic_style(severity, true, style);
1346 diagnostic_highlight.underline = Some(Underline {
1347 color: Some(diagnostic_style.message.text.color),
1348 thickness: 1.0.into(),
1349 squiggly: true,
1350 });
1351 }
1352 }
1353
1354 if let Some(highlight_style) = highlight_style.as_mut() {
1355 highlight_style.highlight(diagnostic_highlight);
1356 } else {
1357 highlight_style = Some(diagnostic_highlight);
1358 }
1359
1360 (chunk.text, highlight_style)
1361 });
1362 layout_highlighted_chunks(
1363 chunks,
1364 &style.text,
1365 cx.text_layout_cache,
1366 cx.font_cache,
1367 MAX_LINE_LEN,
1368 rows.len() as usize,
1369 )
1370 }
1371 }
1372
1373 #[allow(clippy::too_many_arguments)]
1374 fn layout_blocks(
1375 &mut self,
1376 rows: Range<u32>,
1377 snapshot: &EditorSnapshot,
1378 editor_width: f32,
1379 scroll_width: f32,
1380 gutter_padding: f32,
1381 gutter_width: f32,
1382 em_width: f32,
1383 text_x: f32,
1384 line_height: f32,
1385 style: &EditorStyle,
1386 line_layouts: &[text_layout::Line],
1387 include_root: bool,
1388 cx: &mut LayoutContext,
1389 ) -> (f32, Vec<BlockLayout>) {
1390 let editor = if let Some(editor) = self.view.upgrade(cx) {
1391 editor
1392 } else {
1393 return Default::default();
1394 };
1395
1396 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1397 let scroll_x = snapshot.scroll_anchor.offset.x();
1398 let (fixed_blocks, non_fixed_blocks) = snapshot
1399 .blocks_in_range(rows.clone())
1400 .partition::<Vec<_>, _>(|(_, block)| match block {
1401 TransformBlock::ExcerptHeader { .. } => false,
1402 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1403 });
1404 let mut render_block = |block: &TransformBlock, width: f32| {
1405 let mut element = match block {
1406 TransformBlock::Custom(block) => {
1407 let align_to = block
1408 .position()
1409 .to_point(&snapshot.buffer_snapshot)
1410 .to_display_point(snapshot);
1411 let anchor_x = text_x
1412 + if rows.contains(&align_to.row()) {
1413 line_layouts[(align_to.row() - rows.start) as usize]
1414 .x_for_index(align_to.column() as usize)
1415 } else {
1416 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1417 .x_for_index(align_to.column() as usize)
1418 };
1419
1420 cx.render(&editor, |_, cx| {
1421 block.render(&mut BlockContext {
1422 cx,
1423 anchor_x,
1424 gutter_padding,
1425 line_height,
1426 scroll_x,
1427 gutter_width,
1428 em_width,
1429 })
1430 })
1431 }
1432 TransformBlock::ExcerptHeader {
1433 id,
1434 buffer,
1435 range,
1436 starts_new_buffer,
1437 ..
1438 } => {
1439 let id = *id;
1440 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1441 let jump_position = range
1442 .primary
1443 .as_ref()
1444 .map_or(range.context.start, |primary| primary.start);
1445 let jump_action = crate::Jump {
1446 path: ProjectPath {
1447 worktree_id: file.worktree_id(cx),
1448 path: file.path.clone(),
1449 },
1450 position: language::ToPoint::to_point(&jump_position, buffer),
1451 anchor: jump_position,
1452 };
1453
1454 enum JumpIcon {}
1455 cx.render(&editor, |_, cx| {
1456 MouseEventHandler::<JumpIcon>::new(id.into(), cx, |state, _| {
1457 let style = style.jump_icon.style_for(state, false);
1458 Svg::new("icons/arrow_up_right_8.svg")
1459 .with_color(style.color)
1460 .constrained()
1461 .with_width(style.icon_width)
1462 .aligned()
1463 .contained()
1464 .with_style(style.container)
1465 .constrained()
1466 .with_width(style.button_width)
1467 .with_height(style.button_width)
1468 .boxed()
1469 })
1470 .with_cursor_style(CursorStyle::PointingHand)
1471 .on_click(MouseButton::Left, move |_, cx| {
1472 cx.dispatch_action(jump_action.clone())
1473 })
1474 .with_tooltip::<JumpIcon, _>(
1475 id.into(),
1476 "Jump to Buffer".to_string(),
1477 Some(Box::new(crate::OpenExcerpts)),
1478 tooltip_style.clone(),
1479 cx,
1480 )
1481 .aligned()
1482 .flex_float()
1483 .boxed()
1484 })
1485 });
1486
1487 if *starts_new_buffer {
1488 let style = &self.style.diagnostic_path_header;
1489 let font_size =
1490 (style.text_scale_factor * self.style.text.font_size).round();
1491
1492 let path = buffer.resolve_file_path(cx, include_root);
1493 let mut filename = None;
1494 let mut parent_path = None;
1495 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1496 if let Some(path) = path {
1497 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1498 parent_path =
1499 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1500 }
1501
1502 Flex::row()
1503 .with_child(
1504 Label::new(
1505 filename.unwrap_or_else(|| "untitled".to_string()),
1506 style.filename.text.clone().with_font_size(font_size),
1507 )
1508 .contained()
1509 .with_style(style.filename.container)
1510 .aligned()
1511 .boxed(),
1512 )
1513 .with_children(parent_path.map(|path| {
1514 Label::new(path, style.path.text.clone().with_font_size(font_size))
1515 .contained()
1516 .with_style(style.path.container)
1517 .aligned()
1518 .boxed()
1519 }))
1520 .with_children(jump_icon)
1521 .contained()
1522 .with_style(style.container)
1523 .with_padding_left(gutter_padding)
1524 .with_padding_right(gutter_padding)
1525 .expanded()
1526 .named("path header block")
1527 } else {
1528 let text_style = self.style.text.clone();
1529 Flex::row()
1530 .with_child(Label::new("⋯", text_style).boxed())
1531 .with_children(jump_icon)
1532 .contained()
1533 .with_padding_left(gutter_padding)
1534 .with_padding_right(gutter_padding)
1535 .expanded()
1536 .named("collapsed context")
1537 }
1538 }
1539 };
1540
1541 element.layout(
1542 SizeConstraint {
1543 min: Vector2F::zero(),
1544 max: vec2f(width, block.height() as f32 * line_height),
1545 },
1546 cx,
1547 );
1548 element
1549 };
1550
1551 let mut fixed_block_max_width = 0f32;
1552 let mut blocks = Vec::new();
1553 for (row, block) in fixed_blocks {
1554 let element = render_block(block, f32::INFINITY);
1555 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1556 blocks.push(BlockLayout {
1557 row,
1558 element,
1559 style: BlockStyle::Fixed,
1560 });
1561 }
1562 for (row, block) in non_fixed_blocks {
1563 let style = match block {
1564 TransformBlock::Custom(block) => block.style(),
1565 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1566 };
1567 let width = match style {
1568 BlockStyle::Sticky => editor_width,
1569 BlockStyle::Flex => editor_width
1570 .max(fixed_block_max_width)
1571 .max(gutter_width + scroll_width),
1572 BlockStyle::Fixed => unreachable!(),
1573 };
1574 let element = render_block(block, width);
1575 blocks.push(BlockLayout {
1576 row,
1577 element,
1578 style,
1579 });
1580 }
1581 (
1582 scroll_width.max(fixed_block_max_width - gutter_width),
1583 blocks,
1584 )
1585 }
1586}
1587
1588impl Element for EditorElement {
1589 type LayoutState = LayoutState;
1590 type PaintState = ();
1591
1592 fn layout(
1593 &mut self,
1594 constraint: SizeConstraint,
1595 cx: &mut LayoutContext,
1596 ) -> (Vector2F, Self::LayoutState) {
1597 let mut size = constraint.max;
1598 if size.x().is_infinite() {
1599 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1600 }
1601
1602 let snapshot = self.snapshot(cx.app);
1603 let style = self.style.clone();
1604 let line_height = style.text.line_height(cx.font_cache);
1605
1606 let gutter_padding;
1607 let gutter_width;
1608 let gutter_margin;
1609 if snapshot.mode == EditorMode::Full {
1610 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1611 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1612 gutter_margin = -style.text.descent(cx.font_cache);
1613 } else {
1614 gutter_padding = 0.0;
1615 gutter_width = 0.0;
1616 gutter_margin = 0.0;
1617 };
1618
1619 let text_width = size.x() - gutter_width;
1620 let em_width = style.text.em_width(cx.font_cache);
1621 let em_advance = style.text.em_advance(cx.font_cache);
1622 let overscroll = vec2f(em_width, 0.);
1623 let snapshot = self.update_view(cx.app, |view, cx| {
1624 view.set_visible_line_count(size.y() / line_height);
1625
1626 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1627 let wrap_width = match view.soft_wrap_mode(cx) {
1628 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1629 SoftWrap::EditorWidth => editor_width,
1630 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1631 };
1632
1633 if view.set_wrap_width(Some(wrap_width), cx) {
1634 view.snapshot(cx)
1635 } else {
1636 snapshot
1637 }
1638 });
1639
1640 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1641 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1642 size.set_y(
1643 scroll_height
1644 .min(constraint.max_along(Axis::Vertical))
1645 .max(constraint.min_along(Axis::Vertical))
1646 .min(line_height * max_lines as f32),
1647 )
1648 } else if let EditorMode::SingleLine = snapshot.mode {
1649 size.set_y(
1650 line_height
1651 .min(constraint.max_along(Axis::Vertical))
1652 .max(constraint.min_along(Axis::Vertical)),
1653 )
1654 } else if size.y().is_infinite() {
1655 size.set_y(scroll_height);
1656 }
1657 let gutter_size = vec2f(gutter_width, size.y());
1658 let text_size = vec2f(text_width, size.y());
1659
1660 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1661 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1662 let snapshot = view.snapshot(cx);
1663 (autoscroll_horizontally, snapshot)
1664 });
1665
1666 let scroll_position = snapshot.scroll_position();
1667 // The scroll position is a fractional point, the whole number of which represents
1668 // the top of the window in terms of display rows.
1669 let start_row = scroll_position.y() as u32;
1670 let height_in_lines = size.y() / line_height;
1671 let max_row = snapshot.max_point().row();
1672
1673 // Add 1 to ensure selections bleed off screen
1674 let end_row = 1 + cmp::min(
1675 (scroll_position.y() + height_in_lines).ceil() as u32,
1676 max_row,
1677 );
1678
1679 let start_anchor = if start_row == 0 {
1680 Anchor::min()
1681 } else {
1682 snapshot
1683 .buffer_snapshot
1684 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1685 };
1686 let end_anchor = if end_row > max_row {
1687 Anchor::max()
1688 } else {
1689 snapshot
1690 .buffer_snapshot
1691 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1692 };
1693
1694 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1695 let mut active_rows = BTreeMap::new();
1696 let mut highlighted_rows = None;
1697 let mut highlighted_ranges = Vec::new();
1698 let mut fold_ranges = Vec::new();
1699 let mut show_scrollbars = false;
1700 let mut include_root = false;
1701 let mut is_singleton = false;
1702 self.update_view(cx.app, |view, cx| {
1703 is_singleton = view.is_singleton(cx);
1704
1705 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1706
1707 highlighted_rows = view.highlighted_rows();
1708 let theme = cx.global::<Settings>().theme.as_ref();
1709 highlighted_ranges =
1710 view.background_highlights_in_range(start_anchor..end_anchor, &display_map, theme);
1711
1712 fold_ranges.extend(
1713 snapshot
1714 .folds_in_range(start_anchor..end_anchor)
1715 .map(|anchor| {
1716 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1717 (
1718 start.row,
1719 start.to_display_point(&snapshot.display_snapshot)
1720 ..anchor.end.to_display_point(&snapshot),
1721 )
1722 }),
1723 );
1724
1725 let mut remote_selections = HashMap::default();
1726 for (replica_id, line_mode, cursor_shape, selection) in display_map
1727 .buffer_snapshot
1728 .remote_selections_in_range(&(start_anchor..end_anchor))
1729 {
1730 // The local selections match the leader's selections.
1731 if Some(replica_id) == view.leader_replica_id {
1732 continue;
1733 }
1734 remote_selections
1735 .entry(replica_id)
1736 .or_insert(Vec::new())
1737 .push(SelectionLayout::new(
1738 selection,
1739 line_mode,
1740 cursor_shape,
1741 &display_map,
1742 ));
1743 }
1744 selections.extend(remote_selections);
1745
1746 if view.show_local_selections {
1747 let mut local_selections = view
1748 .selections
1749 .disjoint_in_range(start_anchor..end_anchor, cx);
1750 local_selections.extend(view.selections.pending(cx));
1751 for selection in &local_selections {
1752 let is_empty = selection.start == selection.end;
1753 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1754 let selection_end = snapshot.next_line_boundary(selection.end).1;
1755 for row in cmp::max(selection_start.row(), start_row)
1756 ..=cmp::min(selection_end.row(), end_row)
1757 {
1758 let contains_non_empty_selection =
1759 active_rows.entry(row).or_insert(!is_empty);
1760 *contains_non_empty_selection |= !is_empty;
1761 }
1762 }
1763
1764 // Render the local selections in the leader's color when following.
1765 let local_replica_id = view
1766 .leader_replica_id
1767 .unwrap_or_else(|| view.replica_id(cx));
1768
1769 selections.push((
1770 local_replica_id,
1771 local_selections
1772 .into_iter()
1773 .map(|selection| {
1774 SelectionLayout::new(
1775 selection,
1776 view.selections.line_mode,
1777 view.cursor_shape,
1778 &display_map,
1779 )
1780 })
1781 .collect(),
1782 ));
1783 }
1784
1785 show_scrollbars = view.scroll_manager.scrollbars_visible();
1786 include_root = view
1787 .project
1788 .as_ref()
1789 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1790 .unwrap_or_default()
1791 });
1792
1793 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1794 .into_iter()
1795 .map(|(id, fold)| {
1796 let color = self
1797 .style
1798 .folds
1799 .ellipses
1800 .background
1801 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1802 .color;
1803
1804 (id, fold, color)
1805 })
1806 .collect();
1807
1808 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
1809 start_row..end_row,
1810 &active_rows,
1811 is_singleton,
1812 &snapshot,
1813 cx,
1814 );
1815
1816 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1817
1818 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1819
1820 let mut max_visible_line_width = 0.0;
1821 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1822 for line in &line_layouts {
1823 if line.width() > max_visible_line_width {
1824 max_visible_line_width = line.width();
1825 }
1826 }
1827
1828 let style = self.style.clone();
1829 let longest_line_width = layout_line(
1830 snapshot.longest_row(),
1831 &snapshot,
1832 &style,
1833 cx.text_layout_cache,
1834 )
1835 .width();
1836 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1837 let em_width = style.text.em_width(cx.font_cache);
1838 let (scroll_width, blocks) = self.layout_blocks(
1839 start_row..end_row,
1840 &snapshot,
1841 size.x(),
1842 scroll_width,
1843 gutter_padding,
1844 gutter_width,
1845 em_width,
1846 gutter_width + gutter_margin,
1847 line_height,
1848 &style,
1849 &line_layouts,
1850 include_root,
1851 cx,
1852 );
1853
1854 let scroll_max = vec2f(
1855 ((scroll_width - text_size.x()) / em_width).max(0.0),
1856 max_row as f32,
1857 );
1858
1859 self.update_view(cx.app, |view, cx| {
1860 let clamped = view.scroll_manager.clamp_scroll_left(scroll_max.x());
1861
1862 let autoscrolled = if autoscroll_horizontally {
1863 view.autoscroll_horizontally(
1864 start_row,
1865 text_size.x(),
1866 scroll_width,
1867 em_width,
1868 &line_layouts,
1869 cx,
1870 )
1871 } else {
1872 false
1873 };
1874
1875 if clamped || autoscrolled {
1876 snapshot = view.snapshot(cx);
1877 }
1878 });
1879
1880 let mut context_menu = None;
1881 let mut code_actions_indicator = None;
1882 let mut hover = None;
1883 let mut mode = EditorMode::Full;
1884 let mut fold_indicators = cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1885 let newest_selection_head = view
1886 .selections
1887 .newest::<usize>(cx)
1888 .head()
1889 .to_display_point(&snapshot);
1890
1891 let style = view.style(cx);
1892 if (start_row..end_row).contains(&newest_selection_head.row()) {
1893 if view.context_menu_visible() {
1894 context_menu =
1895 view.render_context_menu(newest_selection_head, style.clone(), cx);
1896 }
1897
1898 let active = matches!(view.context_menu, Some(crate::ContextMenu::CodeActions(_)));
1899
1900 code_actions_indicator = view
1901 .render_code_actions_indicator(&style, active, cx)
1902 .map(|indicator| (newest_selection_head.row(), indicator));
1903 }
1904
1905 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1906 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1907 mode = view.mode;
1908
1909 view.render_fold_indicators(
1910 fold_statuses,
1911 &style,
1912 view.gutter_hovered,
1913 line_height,
1914 gutter_margin,
1915 cx,
1916 )
1917 });
1918
1919 if let Some((_, context_menu)) = context_menu.as_mut() {
1920 context_menu.layout(
1921 SizeConstraint {
1922 min: Vector2F::zero(),
1923 max: vec2f(
1924 cx.window_size.x() * 0.7,
1925 (12. * line_height).min((size.y() - line_height) / 2.),
1926 ),
1927 },
1928 cx,
1929 );
1930 }
1931
1932 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1933 indicator.layout(
1934 SizeConstraint::strict_along(
1935 Axis::Vertical,
1936 line_height * style.code_actions.vertical_scale,
1937 ),
1938 cx,
1939 );
1940 }
1941
1942 for fold_indicator in fold_indicators.iter_mut() {
1943 if let Some(indicator) = fold_indicator.as_mut() {
1944 indicator.layout(
1945 SizeConstraint::strict_along(
1946 Axis::Vertical,
1947 line_height * style.code_actions.vertical_scale,
1948 ),
1949 cx,
1950 );
1951 }
1952 }
1953
1954 if let Some((_, hover_popovers)) = hover.as_mut() {
1955 for hover_popover in hover_popovers.iter_mut() {
1956 hover_popover.layout(
1957 SizeConstraint {
1958 min: Vector2F::zero(),
1959 max: vec2f(
1960 (120. * em_width) // Default size
1961 .min(size.x() / 2.) // Shrink to half of the editor width
1962 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1963 (16. * line_height) // Default size
1964 .min(size.y() / 2.) // Shrink to half of the editor height
1965 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1966 ),
1967 },
1968 cx,
1969 );
1970 }
1971 }
1972
1973 (
1974 size,
1975 LayoutState {
1976 mode,
1977 position_map: Arc::new(PositionMap {
1978 size,
1979 scroll_max,
1980 line_layouts,
1981 line_height,
1982 em_width,
1983 em_advance,
1984 snapshot,
1985 }),
1986 visible_display_row_range: start_row..end_row,
1987 gutter_size,
1988 gutter_padding,
1989 text_size,
1990 scrollbar_row_range,
1991 show_scrollbars,
1992 max_row,
1993 gutter_margin,
1994 active_rows,
1995 highlighted_rows,
1996 highlighted_ranges,
1997 fold_ranges,
1998 line_number_layouts,
1999 display_hunks,
2000 blocks,
2001 selections,
2002 context_menu,
2003 code_actions_indicator,
2004 fold_indicators,
2005 hover_popovers: hover,
2006 },
2007 )
2008 }
2009
2010 fn paint(
2011 &mut self,
2012 bounds: RectF,
2013 visible_bounds: RectF,
2014 layout: &mut Self::LayoutState,
2015 cx: &mut PaintContext,
2016 ) -> Self::PaintState {
2017 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2018 cx.scene.push_layer(Some(visible_bounds));
2019
2020 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2021 let text_bounds = RectF::new(
2022 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2023 layout.text_size,
2024 );
2025
2026 Self::attach_mouse_handlers(
2027 &self.view,
2028 &layout.position_map,
2029 layout.hover_popovers.is_some(),
2030 visible_bounds,
2031 text_bounds,
2032 gutter_bounds,
2033 bounds,
2034 cx,
2035 );
2036
2037 self.paint_background(gutter_bounds, text_bounds, layout, cx);
2038 if layout.gutter_size.x() > 0. {
2039 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
2040 }
2041 self.paint_text(text_bounds, visible_bounds, layout, cx);
2042
2043 cx.scene.push_layer(Some(bounds));
2044 if !layout.blocks.is_empty() {
2045 self.paint_blocks(bounds, visible_bounds, layout, cx);
2046 }
2047 self.paint_scrollbar(bounds, layout, cx);
2048 cx.scene.pop_layer();
2049
2050 cx.scene.pop_layer();
2051 }
2052
2053 fn rect_for_text_range(
2054 &self,
2055 range_utf16: Range<usize>,
2056 bounds: RectF,
2057 _: RectF,
2058 layout: &Self::LayoutState,
2059 _: &Self::PaintState,
2060 _: &gpui::MeasurementContext,
2061 ) -> Option<RectF> {
2062 let text_bounds = RectF::new(
2063 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2064 layout.text_size,
2065 );
2066 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2067 let scroll_position = layout.position_map.snapshot.scroll_position();
2068 let start_row = scroll_position.y() as u32;
2069 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2070 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2071
2072 let range_start = OffsetUtf16(range_utf16.start)
2073 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2074 if range_start.row() < start_row {
2075 return None;
2076 }
2077
2078 let line = layout
2079 .position_map
2080 .line_layouts
2081 .get((range_start.row() - start_row) as usize)?;
2082 let range_start_x = line.x_for_index(range_start.column() as usize);
2083 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2084 Some(RectF::new(
2085 content_origin
2086 + vec2f(
2087 range_start_x,
2088 range_start_y + layout.position_map.line_height,
2089 )
2090 - vec2f(scroll_left, scroll_top),
2091 vec2f(
2092 layout.position_map.em_width,
2093 layout.position_map.line_height,
2094 ),
2095 ))
2096 }
2097
2098 fn debug(
2099 &self,
2100 bounds: RectF,
2101 _: &Self::LayoutState,
2102 _: &Self::PaintState,
2103 _: &gpui::DebugContext,
2104 ) -> json::Value {
2105 json!({
2106 "type": "BufferElement",
2107 "bounds": bounds.to_json()
2108 })
2109 }
2110}
2111
2112type BufferRow = u32;
2113
2114pub struct LayoutState {
2115 position_map: Arc<PositionMap>,
2116 gutter_size: Vector2F,
2117 gutter_padding: f32,
2118 gutter_margin: f32,
2119 text_size: Vector2F,
2120 mode: EditorMode,
2121 visible_display_row_range: Range<u32>,
2122 active_rows: BTreeMap<u32, bool>,
2123 highlighted_rows: Option<Range<u32>>,
2124 line_number_layouts: Vec<Option<text_layout::Line>>,
2125 display_hunks: Vec<DisplayDiffHunk>,
2126 blocks: Vec<BlockLayout>,
2127 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2128 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2129 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2130 scrollbar_row_range: Range<f32>,
2131 show_scrollbars: bool,
2132 max_row: u32,
2133 context_menu: Option<(DisplayPoint, ElementBox)>,
2134 code_actions_indicator: Option<(u32, ElementBox)>,
2135 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
2136 fold_indicators: Vec<Option<ElementBox>>,
2137}
2138
2139pub struct PositionMap {
2140 size: Vector2F,
2141 line_height: f32,
2142 scroll_max: Vector2F,
2143 em_width: f32,
2144 em_advance: f32,
2145 line_layouts: Vec<text_layout::Line>,
2146 snapshot: EditorSnapshot,
2147}
2148
2149impl PositionMap {
2150 /// Returns two display points:
2151 /// 1. The nearest *valid* position in the editor
2152 /// 2. An unclipped, potentially *invalid* position that maps directly to
2153 /// the given pixel position.
2154 fn point_for_position(
2155 &self,
2156 text_bounds: RectF,
2157 position: Vector2F,
2158 ) -> (DisplayPoint, DisplayPoint) {
2159 let scroll_position = self.snapshot.scroll_position();
2160 let position = position - text_bounds.origin();
2161 let y = position.y().max(0.0).min(self.size.y());
2162 let x = position.x() + (scroll_position.x() * self.em_width);
2163 let row = (y / self.line_height + scroll_position.y()) as u32;
2164 let (column, x_overshoot) = if let Some(line) = self
2165 .line_layouts
2166 .get(row as usize - scroll_position.y() as usize)
2167 {
2168 if let Some(ix) = line.index_for_x(x) {
2169 (ix as u32, 0.0)
2170 } else {
2171 (line.len() as u32, 0f32.max(x - line.width()))
2172 }
2173 } else {
2174 (0, x)
2175 };
2176
2177 let mut target_point = DisplayPoint::new(row, column);
2178 let point = self.snapshot.clip_point(target_point, Bias::Left);
2179 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2180
2181 (point, target_point)
2182 }
2183}
2184
2185struct BlockLayout {
2186 row: u32,
2187 element: ElementBox,
2188 style: BlockStyle,
2189}
2190
2191fn layout_line(
2192 row: u32,
2193 snapshot: &EditorSnapshot,
2194 style: &EditorStyle,
2195 layout_cache: &TextLayoutCache,
2196) -> text_layout::Line {
2197 let mut line = snapshot.line(row);
2198
2199 if line.len() > MAX_LINE_LEN {
2200 let mut len = MAX_LINE_LEN;
2201 while !line.is_char_boundary(len) {
2202 len -= 1;
2203 }
2204
2205 line.truncate(len);
2206 }
2207
2208 layout_cache.layout_str(
2209 &line,
2210 style.text.font_size,
2211 &[(
2212 snapshot.line_len(row) as usize,
2213 RunStyle {
2214 font_id: style.text.font_id,
2215 color: Color::black(),
2216 underline: Default::default(),
2217 },
2218 )],
2219 )
2220}
2221
2222#[derive(Debug)]
2223pub struct Cursor {
2224 origin: Vector2F,
2225 block_width: f32,
2226 line_height: f32,
2227 color: Color,
2228 shape: CursorShape,
2229 block_text: Option<Line>,
2230}
2231
2232impl Cursor {
2233 pub fn new(
2234 origin: Vector2F,
2235 block_width: f32,
2236 line_height: f32,
2237 color: Color,
2238 shape: CursorShape,
2239 block_text: Option<Line>,
2240 ) -> Cursor {
2241 Cursor {
2242 origin,
2243 block_width,
2244 line_height,
2245 color,
2246 shape,
2247 block_text,
2248 }
2249 }
2250
2251 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2252 RectF::new(
2253 self.origin + origin,
2254 vec2f(self.block_width, self.line_height),
2255 )
2256 }
2257
2258 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2259 let bounds = match self.shape {
2260 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2261 CursorShape::Block | CursorShape::Hollow => RectF::new(
2262 self.origin + origin,
2263 vec2f(self.block_width, self.line_height),
2264 ),
2265 CursorShape::Underscore => RectF::new(
2266 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2267 vec2f(self.block_width, 2.0),
2268 ),
2269 };
2270
2271 //Draw background or border quad
2272 if matches!(self.shape, CursorShape::Hollow) {
2273 cx.scene.push_quad(Quad {
2274 bounds,
2275 background: None,
2276 border: Border::all(1., self.color),
2277 corner_radius: 0.,
2278 });
2279 } else {
2280 cx.scene.push_quad(Quad {
2281 bounds,
2282 background: Some(self.color),
2283 border: Default::default(),
2284 corner_radius: 0.,
2285 });
2286 }
2287
2288 if let Some(block_text) = &self.block_text {
2289 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2290 }
2291 }
2292
2293 pub fn shape(&self) -> CursorShape {
2294 self.shape
2295 }
2296}
2297
2298#[derive(Debug)]
2299pub struct HighlightedRange {
2300 pub start_y: f32,
2301 pub line_height: f32,
2302 pub lines: Vec<HighlightedRangeLine>,
2303 pub color: Color,
2304 pub corner_radius: f32,
2305}
2306
2307#[derive(Debug)]
2308pub struct HighlightedRangeLine {
2309 pub start_x: f32,
2310 pub end_x: f32,
2311}
2312
2313impl HighlightedRange {
2314 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2315 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2316 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2317 self.paint_lines(
2318 self.start_y + self.line_height,
2319 &self.lines[1..],
2320 bounds,
2321 scene,
2322 );
2323 } else {
2324 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2325 }
2326 }
2327
2328 fn paint_lines(
2329 &self,
2330 start_y: f32,
2331 lines: &[HighlightedRangeLine],
2332 bounds: RectF,
2333 scene: &mut SceneBuilder,
2334 ) {
2335 if lines.is_empty() {
2336 return;
2337 }
2338
2339 let mut path = PathBuilder::new();
2340 let first_line = lines.first().unwrap();
2341 let last_line = lines.last().unwrap();
2342
2343 let first_top_left = vec2f(first_line.start_x, start_y);
2344 let first_top_right = vec2f(first_line.end_x, start_y);
2345
2346 let curve_height = vec2f(0., self.corner_radius);
2347 let curve_width = |start_x: f32, end_x: f32| {
2348 let max = (end_x - start_x) / 2.;
2349 let width = if max < self.corner_radius {
2350 max
2351 } else {
2352 self.corner_radius
2353 };
2354
2355 vec2f(width, 0.)
2356 };
2357
2358 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2359 path.reset(first_top_right - top_curve_width);
2360 path.curve_to(first_top_right + curve_height, first_top_right);
2361
2362 let mut iter = lines.iter().enumerate().peekable();
2363 while let Some((ix, line)) = iter.next() {
2364 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2365
2366 if let Some((_, next_line)) = iter.peek() {
2367 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2368
2369 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2370 Ordering::Equal => {
2371 path.line_to(bottom_right);
2372 }
2373 Ordering::Less => {
2374 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2375 path.line_to(bottom_right - curve_height);
2376 if self.corner_radius > 0. {
2377 path.curve_to(bottom_right - curve_width, bottom_right);
2378 }
2379 path.line_to(next_top_right + curve_width);
2380 if self.corner_radius > 0. {
2381 path.curve_to(next_top_right + curve_height, next_top_right);
2382 }
2383 }
2384 Ordering::Greater => {
2385 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2386 path.line_to(bottom_right - curve_height);
2387 if self.corner_radius > 0. {
2388 path.curve_to(bottom_right + curve_width, bottom_right);
2389 }
2390 path.line_to(next_top_right - curve_width);
2391 if self.corner_radius > 0. {
2392 path.curve_to(next_top_right + curve_height, next_top_right);
2393 }
2394 }
2395 }
2396 } else {
2397 let curve_width = curve_width(line.start_x, line.end_x);
2398 path.line_to(bottom_right - curve_height);
2399 if self.corner_radius > 0. {
2400 path.curve_to(bottom_right - curve_width, bottom_right);
2401 }
2402
2403 let bottom_left = vec2f(line.start_x, bottom_right.y());
2404 path.line_to(bottom_left + curve_width);
2405 if self.corner_radius > 0. {
2406 path.curve_to(bottom_left - curve_height, bottom_left);
2407 }
2408 }
2409 }
2410
2411 if first_line.start_x > last_line.start_x {
2412 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2413 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2414 path.line_to(second_top_left + curve_height);
2415 if self.corner_radius > 0. {
2416 path.curve_to(second_top_left + curve_width, second_top_left);
2417 }
2418 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2419 path.line_to(first_bottom_left - curve_width);
2420 if self.corner_radius > 0. {
2421 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2422 }
2423 }
2424
2425 path.line_to(first_top_left + curve_height);
2426 if self.corner_radius > 0. {
2427 path.curve_to(first_top_left + top_curve_width, first_top_left);
2428 }
2429 path.line_to(first_top_right - top_curve_width);
2430
2431 scene.push_path(path.build(self.color, Some(bounds)));
2432 }
2433}
2434
2435pub fn position_to_display_point(
2436 position: Vector2F,
2437 text_bounds: RectF,
2438 position_map: &PositionMap,
2439) -> Option<DisplayPoint> {
2440 if text_bounds.contains_point(position) {
2441 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2442 if point == target_point {
2443 Some(point)
2444 } else {
2445 None
2446 }
2447 } else {
2448 None
2449 }
2450}
2451
2452pub fn range_to_bounds(
2453 range: &Range<DisplayPoint>,
2454 content_origin: Vector2F,
2455 scroll_left: f32,
2456 scroll_top: f32,
2457 visible_row_range: &Range<u32>,
2458 line_end_overshoot: f32,
2459 position_map: &PositionMap,
2460) -> impl Iterator<Item = RectF> {
2461 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2462
2463 if range.start == range.end {
2464 return bounds.into_iter();
2465 }
2466
2467 let start_row = visible_row_range.start;
2468 let end_row = visible_row_range.end;
2469
2470 let row_range = if range.end.column() == 0 {
2471 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2472 } else {
2473 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2474 };
2475
2476 let first_y =
2477 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2478
2479 for (idx, row) in row_range.enumerate() {
2480 let line_layout = &position_map.line_layouts[(row - start_row) as usize];
2481
2482 let start_x = if row == range.start.row() {
2483 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2484 - scroll_left
2485 } else {
2486 content_origin.x() - scroll_left
2487 };
2488
2489 let end_x = if row == range.end.row() {
2490 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2491 } else {
2492 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2493 };
2494
2495 bounds.push(RectF::from_points(
2496 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2497 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2498 ))
2499 }
2500
2501 bounds.into_iter()
2502}
2503
2504pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2505 delta.powf(1.5) / 100.0
2506}
2507
2508fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2509 delta.powf(1.2) / 300.0
2510}
2511
2512#[cfg(test)]
2513mod tests {
2514 use std::sync::Arc;
2515
2516 use super::*;
2517 use crate::{
2518 display_map::{BlockDisposition, BlockProperties},
2519 Editor, MultiBuffer,
2520 };
2521 use settings::Settings;
2522 use util::test::sample_text;
2523
2524 #[gpui::test]
2525 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2526 cx.set_global(Settings::test(cx));
2527 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2528 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2529 Editor::new(EditorMode::Full, buffer, None, None, cx)
2530 });
2531 let element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2532
2533 let layouts = editor.update(cx, |editor, cx| {
2534 let snapshot = editor.snapshot(cx);
2535 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2536 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2537 element
2538 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, &layout_cx)
2539 .0
2540 });
2541 assert_eq!(layouts.len(), 6);
2542 }
2543
2544 #[gpui::test]
2545 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2546 cx.set_global(Settings::test(cx));
2547 let buffer = MultiBuffer::build_simple("", cx);
2548 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2549 Editor::new(EditorMode::Full, buffer, None, None, cx)
2550 });
2551
2552 editor.update(cx, |editor, cx| {
2553 editor.set_placeholder_text("hello", cx);
2554 editor.insert_blocks(
2555 [BlockProperties {
2556 style: BlockStyle::Fixed,
2557 disposition: BlockDisposition::Above,
2558 height: 3,
2559 position: Anchor::min(),
2560 render: Arc::new(|_| Empty::new().boxed()),
2561 }],
2562 cx,
2563 );
2564
2565 // Blur the editor so that it displays placeholder text.
2566 cx.blur();
2567 });
2568
2569 let mut element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2570
2571 let mut scene = SceneBuilder::new(1.0);
2572 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2573 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2574 let (size, mut state) = element.layout(
2575 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2576 &mut layout_cx,
2577 );
2578
2579 assert_eq!(state.position_map.line_layouts.len(), 4);
2580 assert_eq!(
2581 state
2582 .line_number_layouts
2583 .iter()
2584 .map(Option::is_some)
2585 .collect::<Vec<_>>(),
2586 &[false, false, false, true]
2587 );
2588
2589 // Don't panic.
2590 let bounds = RectF::new(Default::default(), size);
2591 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2592 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2593 }
2594}