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.chunks(rows.clone(), true).map(|chunk| {
1322 let mut highlight_style = chunk
1323 .syntax_highlight_id
1324 .and_then(|id| id.style(&style.syntax));
1325
1326 if let Some(chunk_highlight) = chunk.highlight_style {
1327 if let Some(highlight_style) = highlight_style.as_mut() {
1328 highlight_style.highlight(chunk_highlight);
1329 } else {
1330 highlight_style = Some(chunk_highlight);
1331 }
1332 }
1333
1334 let mut diagnostic_highlight = HighlightStyle::default();
1335
1336 if chunk.is_unnecessary {
1337 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1338 }
1339
1340 if let Some(severity) = chunk.diagnostic_severity {
1341 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1342 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1343 let diagnostic_style = super::diagnostic_style(severity, true, style);
1344 diagnostic_highlight.underline = Some(Underline {
1345 color: Some(diagnostic_style.message.text.color),
1346 thickness: 1.0.into(),
1347 squiggly: true,
1348 });
1349 }
1350 }
1351
1352 if let Some(highlight_style) = highlight_style.as_mut() {
1353 highlight_style.highlight(diagnostic_highlight);
1354 } else {
1355 highlight_style = Some(diagnostic_highlight);
1356 }
1357
1358 (chunk.text, highlight_style)
1359 });
1360 layout_highlighted_chunks(
1361 chunks,
1362 &style.text,
1363 cx.text_layout_cache,
1364 cx.font_cache,
1365 MAX_LINE_LEN,
1366 rows.len() as usize,
1367 )
1368 }
1369 }
1370
1371 #[allow(clippy::too_many_arguments)]
1372 fn layout_blocks(
1373 &mut self,
1374 rows: Range<u32>,
1375 snapshot: &EditorSnapshot,
1376 editor_width: f32,
1377 scroll_width: f32,
1378 gutter_padding: f32,
1379 gutter_width: f32,
1380 em_width: f32,
1381 text_x: f32,
1382 line_height: f32,
1383 style: &EditorStyle,
1384 line_layouts: &[text_layout::Line],
1385 include_root: bool,
1386 cx: &mut LayoutContext,
1387 ) -> (f32, Vec<BlockLayout>) {
1388 let editor = if let Some(editor) = self.view.upgrade(cx) {
1389 editor
1390 } else {
1391 return Default::default();
1392 };
1393
1394 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1395 let scroll_x = snapshot.scroll_anchor.offset.x();
1396 let (fixed_blocks, non_fixed_blocks) = snapshot
1397 .blocks_in_range(rows.clone())
1398 .partition::<Vec<_>, _>(|(_, block)| match block {
1399 TransformBlock::ExcerptHeader { .. } => false,
1400 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1401 });
1402 let mut render_block = |block: &TransformBlock, width: f32| {
1403 let mut element = match block {
1404 TransformBlock::Custom(block) => {
1405 let align_to = block
1406 .position()
1407 .to_point(&snapshot.buffer_snapshot)
1408 .to_display_point(snapshot);
1409 let anchor_x = text_x
1410 + if rows.contains(&align_to.row()) {
1411 line_layouts[(align_to.row() - rows.start) as usize]
1412 .x_for_index(align_to.column() as usize)
1413 } else {
1414 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1415 .x_for_index(align_to.column() as usize)
1416 };
1417
1418 cx.render(&editor, |_, cx| {
1419 block.render(&mut BlockContext {
1420 cx,
1421 anchor_x,
1422 gutter_padding,
1423 line_height,
1424 scroll_x,
1425 gutter_width,
1426 em_width,
1427 })
1428 })
1429 }
1430 TransformBlock::ExcerptHeader {
1431 id,
1432 buffer,
1433 range,
1434 starts_new_buffer,
1435 ..
1436 } => {
1437 let id = *id;
1438 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1439 let jump_position = range
1440 .primary
1441 .as_ref()
1442 .map_or(range.context.start, |primary| primary.start);
1443 let jump_action = crate::Jump {
1444 path: ProjectPath {
1445 worktree_id: file.worktree_id(cx),
1446 path: file.path.clone(),
1447 },
1448 position: language::ToPoint::to_point(&jump_position, buffer),
1449 anchor: jump_position,
1450 };
1451
1452 enum JumpIcon {}
1453 cx.render(&editor, |_, cx| {
1454 MouseEventHandler::<JumpIcon>::new(id.into(), cx, |state, _| {
1455 let style = style.jump_icon.style_for(state, false);
1456 Svg::new("icons/arrow_up_right_8.svg")
1457 .with_color(style.color)
1458 .constrained()
1459 .with_width(style.icon_width)
1460 .aligned()
1461 .contained()
1462 .with_style(style.container)
1463 .constrained()
1464 .with_width(style.button_width)
1465 .with_height(style.button_width)
1466 .boxed()
1467 })
1468 .with_cursor_style(CursorStyle::PointingHand)
1469 .on_click(MouseButton::Left, move |_, cx| {
1470 cx.dispatch_action(jump_action.clone())
1471 })
1472 .with_tooltip::<JumpIcon, _>(
1473 id.into(),
1474 "Jump to Buffer".to_string(),
1475 Some(Box::new(crate::OpenExcerpts)),
1476 tooltip_style.clone(),
1477 cx,
1478 )
1479 .aligned()
1480 .flex_float()
1481 .boxed()
1482 })
1483 });
1484
1485 if *starts_new_buffer {
1486 let style = &self.style.diagnostic_path_header;
1487 let font_size =
1488 (style.text_scale_factor * self.style.text.font_size).round();
1489
1490 let path = buffer.resolve_file_path(cx, include_root);
1491 let mut filename = None;
1492 let mut parent_path = None;
1493 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1494 if let Some(path) = path {
1495 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1496 parent_path =
1497 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1498 }
1499
1500 Flex::row()
1501 .with_child(
1502 Label::new(
1503 filename.unwrap_or_else(|| "untitled".to_string()),
1504 style.filename.text.clone().with_font_size(font_size),
1505 )
1506 .contained()
1507 .with_style(style.filename.container)
1508 .aligned()
1509 .boxed(),
1510 )
1511 .with_children(parent_path.map(|path| {
1512 Label::new(path, style.path.text.clone().with_font_size(font_size))
1513 .contained()
1514 .with_style(style.path.container)
1515 .aligned()
1516 .boxed()
1517 }))
1518 .with_children(jump_icon)
1519 .contained()
1520 .with_style(style.container)
1521 .with_padding_left(gutter_padding)
1522 .with_padding_right(gutter_padding)
1523 .expanded()
1524 .named("path header block")
1525 } else {
1526 let text_style = self.style.text.clone();
1527 Flex::row()
1528 .with_child(Label::new("⋯", text_style).boxed())
1529 .with_children(jump_icon)
1530 .contained()
1531 .with_padding_left(gutter_padding)
1532 .with_padding_right(gutter_padding)
1533 .expanded()
1534 .named("collapsed context")
1535 }
1536 }
1537 };
1538
1539 element.layout(
1540 SizeConstraint {
1541 min: Vector2F::zero(),
1542 max: vec2f(width, block.height() as f32 * line_height),
1543 },
1544 cx,
1545 );
1546 element
1547 };
1548
1549 let mut fixed_block_max_width = 0f32;
1550 let mut blocks = Vec::new();
1551 for (row, block) in fixed_blocks {
1552 let element = render_block(block, f32::INFINITY);
1553 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1554 blocks.push(BlockLayout {
1555 row,
1556 element,
1557 style: BlockStyle::Fixed,
1558 });
1559 }
1560 for (row, block) in non_fixed_blocks {
1561 let style = match block {
1562 TransformBlock::Custom(block) => block.style(),
1563 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1564 };
1565 let width = match style {
1566 BlockStyle::Sticky => editor_width,
1567 BlockStyle::Flex => editor_width
1568 .max(fixed_block_max_width)
1569 .max(gutter_width + scroll_width),
1570 BlockStyle::Fixed => unreachable!(),
1571 };
1572 let element = render_block(block, width);
1573 blocks.push(BlockLayout {
1574 row,
1575 element,
1576 style,
1577 });
1578 }
1579 (
1580 scroll_width.max(fixed_block_max_width - gutter_width),
1581 blocks,
1582 )
1583 }
1584}
1585
1586impl Element for EditorElement {
1587 type LayoutState = LayoutState;
1588 type PaintState = ();
1589
1590 fn layout(
1591 &mut self,
1592 constraint: SizeConstraint,
1593 cx: &mut LayoutContext,
1594 ) -> (Vector2F, Self::LayoutState) {
1595 let mut size = constraint.max;
1596 if size.x().is_infinite() {
1597 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1598 }
1599
1600 let snapshot = self.snapshot(cx.app);
1601 let style = self.style.clone();
1602 let line_height = style.text.line_height(cx.font_cache);
1603
1604 let gutter_padding;
1605 let gutter_width;
1606 let gutter_margin;
1607 if snapshot.mode == EditorMode::Full {
1608 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1609 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1610 gutter_margin = -style.text.descent(cx.font_cache);
1611 } else {
1612 gutter_padding = 0.0;
1613 gutter_width = 0.0;
1614 gutter_margin = 0.0;
1615 };
1616
1617 let text_width = size.x() - gutter_width;
1618 let em_width = style.text.em_width(cx.font_cache);
1619 let em_advance = style.text.em_advance(cx.font_cache);
1620 let overscroll = vec2f(em_width, 0.);
1621 let snapshot = self.update_view(cx.app, |view, cx| {
1622 view.set_visible_line_count(size.y() / line_height);
1623
1624 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1625 let wrap_width = match view.soft_wrap_mode(cx) {
1626 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1627 SoftWrap::EditorWidth => editor_width,
1628 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1629 };
1630
1631 if view.set_wrap_width(Some(wrap_width), cx) {
1632 view.snapshot(cx)
1633 } else {
1634 snapshot
1635 }
1636 });
1637
1638 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1639 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1640 size.set_y(
1641 scroll_height
1642 .min(constraint.max_along(Axis::Vertical))
1643 .max(constraint.min_along(Axis::Vertical))
1644 .min(line_height * max_lines as f32),
1645 )
1646 } else if let EditorMode::SingleLine = snapshot.mode {
1647 size.set_y(
1648 line_height
1649 .min(constraint.max_along(Axis::Vertical))
1650 .max(constraint.min_along(Axis::Vertical)),
1651 )
1652 } else if size.y().is_infinite() {
1653 size.set_y(scroll_height);
1654 }
1655 let gutter_size = vec2f(gutter_width, size.y());
1656 let text_size = vec2f(text_width, size.y());
1657
1658 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1659 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1660 let snapshot = view.snapshot(cx);
1661 (autoscroll_horizontally, snapshot)
1662 });
1663
1664 let scroll_position = snapshot.scroll_position();
1665 // The scroll position is a fractional point, the whole number of which represents
1666 // the top of the window in terms of display rows.
1667 let start_row = scroll_position.y() as u32;
1668 let height_in_lines = size.y() / line_height;
1669 let max_row = snapshot.max_point().row();
1670
1671 // Add 1 to ensure selections bleed off screen
1672 let end_row = 1 + cmp::min(
1673 (scroll_position.y() + height_in_lines).ceil() as u32,
1674 max_row,
1675 );
1676
1677 let start_anchor = if start_row == 0 {
1678 Anchor::min()
1679 } else {
1680 snapshot
1681 .buffer_snapshot
1682 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1683 };
1684 let end_anchor = if end_row > max_row {
1685 Anchor::max()
1686 } else {
1687 snapshot
1688 .buffer_snapshot
1689 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1690 };
1691
1692 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1693 let mut active_rows = BTreeMap::new();
1694 let mut highlighted_rows = None;
1695 let mut highlighted_ranges = Vec::new();
1696 let mut fold_ranges = Vec::new();
1697 let mut show_scrollbars = false;
1698 let mut include_root = false;
1699 let mut is_singleton = false;
1700 self.update_view(cx.app, |view, cx| {
1701 is_singleton = view.is_singleton(cx);
1702
1703 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1704
1705 highlighted_rows = view.highlighted_rows();
1706 let theme = cx.global::<Settings>().theme.as_ref();
1707 highlighted_ranges =
1708 view.background_highlights_in_range(start_anchor..end_anchor, &display_map, theme);
1709
1710 fold_ranges.extend(
1711 snapshot
1712 .folds_in_range(start_anchor..end_anchor)
1713 .map(|anchor| {
1714 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1715 (
1716 start.row,
1717 start.to_display_point(&snapshot.display_snapshot)
1718 ..anchor.end.to_display_point(&snapshot),
1719 )
1720 }),
1721 );
1722
1723 let mut remote_selections = HashMap::default();
1724 for (replica_id, line_mode, cursor_shape, selection) in display_map
1725 .buffer_snapshot
1726 .remote_selections_in_range(&(start_anchor..end_anchor))
1727 {
1728 // The local selections match the leader's selections.
1729 if Some(replica_id) == view.leader_replica_id {
1730 continue;
1731 }
1732 remote_selections
1733 .entry(replica_id)
1734 .or_insert(Vec::new())
1735 .push(SelectionLayout::new(
1736 selection,
1737 line_mode,
1738 cursor_shape,
1739 &display_map,
1740 ));
1741 }
1742 selections.extend(remote_selections);
1743
1744 if view.show_local_selections {
1745 let mut local_selections = view
1746 .selections
1747 .disjoint_in_range(start_anchor..end_anchor, cx);
1748 local_selections.extend(view.selections.pending(cx));
1749 for selection in &local_selections {
1750 let is_empty = selection.start == selection.end;
1751 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1752 let selection_end = snapshot.next_line_boundary(selection.end).1;
1753 for row in cmp::max(selection_start.row(), start_row)
1754 ..=cmp::min(selection_end.row(), end_row)
1755 {
1756 let contains_non_empty_selection =
1757 active_rows.entry(row).or_insert(!is_empty);
1758 *contains_non_empty_selection |= !is_empty;
1759 }
1760 }
1761
1762 // Render the local selections in the leader's color when following.
1763 let local_replica_id = view
1764 .leader_replica_id
1765 .unwrap_or_else(|| view.replica_id(cx));
1766
1767 selections.push((
1768 local_replica_id,
1769 local_selections
1770 .into_iter()
1771 .map(|selection| {
1772 SelectionLayout::new(
1773 selection,
1774 view.selections.line_mode,
1775 view.cursor_shape,
1776 &display_map,
1777 )
1778 })
1779 .collect(),
1780 ));
1781 }
1782
1783 show_scrollbars = view.scroll_manager.scrollbars_visible();
1784 include_root = view
1785 .project
1786 .as_ref()
1787 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1788 .unwrap_or_default()
1789 });
1790
1791 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1792 .into_iter()
1793 .map(|(id, fold)| {
1794 let color = self
1795 .style
1796 .folds
1797 .ellipses
1798 .background
1799 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1800 .color;
1801
1802 (id, fold, color)
1803 })
1804 .collect();
1805
1806 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
1807 start_row..end_row,
1808 &active_rows,
1809 is_singleton,
1810 &snapshot,
1811 cx,
1812 );
1813
1814 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1815
1816 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1817
1818 let mut max_visible_line_width = 0.0;
1819 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1820 for line in &line_layouts {
1821 if line.width() > max_visible_line_width {
1822 max_visible_line_width = line.width();
1823 }
1824 }
1825
1826 let style = self.style.clone();
1827 let longest_line_width = layout_line(
1828 snapshot.longest_row(),
1829 &snapshot,
1830 &style,
1831 cx.text_layout_cache,
1832 )
1833 .width();
1834 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1835 let em_width = style.text.em_width(cx.font_cache);
1836 let (scroll_width, blocks) = self.layout_blocks(
1837 start_row..end_row,
1838 &snapshot,
1839 size.x(),
1840 scroll_width,
1841 gutter_padding,
1842 gutter_width,
1843 em_width,
1844 gutter_width + gutter_margin,
1845 line_height,
1846 &style,
1847 &line_layouts,
1848 include_root,
1849 cx,
1850 );
1851
1852 let scroll_max = vec2f(
1853 ((scroll_width - text_size.x()) / em_width).max(0.0),
1854 max_row as f32,
1855 );
1856
1857 self.update_view(cx.app, |view, cx| {
1858 let clamped = view.scroll_manager.clamp_scroll_left(scroll_max.x());
1859
1860 let autoscrolled = if autoscroll_horizontally {
1861 view.autoscroll_horizontally(
1862 start_row,
1863 text_size.x(),
1864 scroll_width,
1865 em_width,
1866 &line_layouts,
1867 cx,
1868 )
1869 } else {
1870 false
1871 };
1872
1873 if clamped || autoscrolled {
1874 snapshot = view.snapshot(cx);
1875 }
1876 });
1877
1878 let mut context_menu = None;
1879 let mut code_actions_indicator = None;
1880 let mut hover = None;
1881 let mut mode = EditorMode::Full;
1882 let mut fold_indicators = cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1883 let newest_selection_head = view
1884 .selections
1885 .newest::<usize>(cx)
1886 .head()
1887 .to_display_point(&snapshot);
1888
1889 let style = view.style(cx);
1890 if (start_row..end_row).contains(&newest_selection_head.row()) {
1891 if view.context_menu_visible() {
1892 context_menu =
1893 view.render_context_menu(newest_selection_head, style.clone(), cx);
1894 }
1895
1896 let active = matches!(view.context_menu, Some(crate::ContextMenu::CodeActions(_)));
1897
1898 code_actions_indicator = view
1899 .render_code_actions_indicator(&style, active, cx)
1900 .map(|indicator| (newest_selection_head.row(), indicator));
1901 }
1902
1903 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1904 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1905 mode = view.mode;
1906
1907 view.render_fold_indicators(
1908 fold_statuses,
1909 &style,
1910 view.gutter_hovered,
1911 line_height,
1912 gutter_margin,
1913 cx,
1914 )
1915 });
1916
1917 if let Some((_, context_menu)) = context_menu.as_mut() {
1918 context_menu.layout(
1919 SizeConstraint {
1920 min: Vector2F::zero(),
1921 max: vec2f(
1922 cx.window_size.x() * 0.7,
1923 (12. * line_height).min((size.y() - line_height) / 2.),
1924 ),
1925 },
1926 cx,
1927 );
1928 }
1929
1930 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1931 indicator.layout(
1932 SizeConstraint::strict_along(
1933 Axis::Vertical,
1934 line_height * style.code_actions.vertical_scale,
1935 ),
1936 cx,
1937 );
1938 }
1939
1940 for fold_indicator in fold_indicators.iter_mut() {
1941 if let Some(indicator) = fold_indicator.as_mut() {
1942 indicator.layout(
1943 SizeConstraint::strict_along(
1944 Axis::Vertical,
1945 line_height * style.code_actions.vertical_scale,
1946 ),
1947 cx,
1948 );
1949 }
1950 }
1951
1952 if let Some((_, hover_popovers)) = hover.as_mut() {
1953 for hover_popover in hover_popovers.iter_mut() {
1954 hover_popover.layout(
1955 SizeConstraint {
1956 min: Vector2F::zero(),
1957 max: vec2f(
1958 (120. * em_width) // Default size
1959 .min(size.x() / 2.) // Shrink to half of the editor width
1960 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1961 (16. * line_height) // Default size
1962 .min(size.y() / 2.) // Shrink to half of the editor height
1963 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1964 ),
1965 },
1966 cx,
1967 );
1968 }
1969 }
1970
1971 (
1972 size,
1973 LayoutState {
1974 mode,
1975 position_map: Arc::new(PositionMap {
1976 size,
1977 scroll_max,
1978 line_layouts,
1979 line_height,
1980 em_width,
1981 em_advance,
1982 snapshot,
1983 }),
1984 visible_display_row_range: start_row..end_row,
1985 gutter_size,
1986 gutter_padding,
1987 text_size,
1988 scrollbar_row_range,
1989 show_scrollbars,
1990 max_row,
1991 gutter_margin,
1992 active_rows,
1993 highlighted_rows,
1994 highlighted_ranges,
1995 fold_ranges,
1996 line_number_layouts,
1997 display_hunks,
1998 blocks,
1999 selections,
2000 context_menu,
2001 code_actions_indicator,
2002 fold_indicators,
2003 hover_popovers: hover,
2004 },
2005 )
2006 }
2007
2008 fn paint(
2009 &mut self,
2010 bounds: RectF,
2011 visible_bounds: RectF,
2012 layout: &mut Self::LayoutState,
2013 cx: &mut PaintContext,
2014 ) -> Self::PaintState {
2015 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2016 cx.scene.push_layer(Some(visible_bounds));
2017
2018 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2019 let text_bounds = RectF::new(
2020 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2021 layout.text_size,
2022 );
2023
2024 Self::attach_mouse_handlers(
2025 &self.view,
2026 &layout.position_map,
2027 layout.hover_popovers.is_some(),
2028 visible_bounds,
2029 text_bounds,
2030 gutter_bounds,
2031 bounds,
2032 cx,
2033 );
2034
2035 self.paint_background(gutter_bounds, text_bounds, layout, cx);
2036 if layout.gutter_size.x() > 0. {
2037 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
2038 }
2039 self.paint_text(text_bounds, visible_bounds, layout, cx);
2040
2041 cx.scene.push_layer(Some(bounds));
2042 if !layout.blocks.is_empty() {
2043 self.paint_blocks(bounds, visible_bounds, layout, cx);
2044 }
2045 self.paint_scrollbar(bounds, layout, cx);
2046 cx.scene.pop_layer();
2047
2048 cx.scene.pop_layer();
2049 }
2050
2051 fn rect_for_text_range(
2052 &self,
2053 range_utf16: Range<usize>,
2054 bounds: RectF,
2055 _: RectF,
2056 layout: &Self::LayoutState,
2057 _: &Self::PaintState,
2058 _: &gpui::MeasurementContext,
2059 ) -> Option<RectF> {
2060 let text_bounds = RectF::new(
2061 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2062 layout.text_size,
2063 );
2064 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2065 let scroll_position = layout.position_map.snapshot.scroll_position();
2066 let start_row = scroll_position.y() as u32;
2067 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2068 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2069
2070 let range_start = OffsetUtf16(range_utf16.start)
2071 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2072 if range_start.row() < start_row {
2073 return None;
2074 }
2075
2076 let line = layout
2077 .position_map
2078 .line_layouts
2079 .get((range_start.row() - start_row) as usize)?;
2080 let range_start_x = line.x_for_index(range_start.column() as usize);
2081 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2082 Some(RectF::new(
2083 content_origin
2084 + vec2f(
2085 range_start_x,
2086 range_start_y + layout.position_map.line_height,
2087 )
2088 - vec2f(scroll_left, scroll_top),
2089 vec2f(
2090 layout.position_map.em_width,
2091 layout.position_map.line_height,
2092 ),
2093 ))
2094 }
2095
2096 fn debug(
2097 &self,
2098 bounds: RectF,
2099 _: &Self::LayoutState,
2100 _: &Self::PaintState,
2101 _: &gpui::DebugContext,
2102 ) -> json::Value {
2103 json!({
2104 "type": "BufferElement",
2105 "bounds": bounds.to_json()
2106 })
2107 }
2108}
2109
2110type BufferRow = u32;
2111
2112pub struct LayoutState {
2113 position_map: Arc<PositionMap>,
2114 gutter_size: Vector2F,
2115 gutter_padding: f32,
2116 gutter_margin: f32,
2117 text_size: Vector2F,
2118 mode: EditorMode,
2119 visible_display_row_range: Range<u32>,
2120 active_rows: BTreeMap<u32, bool>,
2121 highlighted_rows: Option<Range<u32>>,
2122 line_number_layouts: Vec<Option<text_layout::Line>>,
2123 display_hunks: Vec<DisplayDiffHunk>,
2124 blocks: Vec<BlockLayout>,
2125 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2126 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2127 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2128 scrollbar_row_range: Range<f32>,
2129 show_scrollbars: bool,
2130 max_row: u32,
2131 context_menu: Option<(DisplayPoint, ElementBox)>,
2132 code_actions_indicator: Option<(u32, ElementBox)>,
2133 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
2134 fold_indicators: Vec<Option<ElementBox>>,
2135}
2136
2137pub struct PositionMap {
2138 size: Vector2F,
2139 line_height: f32,
2140 scroll_max: Vector2F,
2141 em_width: f32,
2142 em_advance: f32,
2143 line_layouts: Vec<text_layout::Line>,
2144 snapshot: EditorSnapshot,
2145}
2146
2147impl PositionMap {
2148 /// Returns two display points:
2149 /// 1. The nearest *valid* position in the editor
2150 /// 2. An unclipped, potentially *invalid* position that maps directly to
2151 /// the given pixel position.
2152 fn point_for_position(
2153 &self,
2154 text_bounds: RectF,
2155 position: Vector2F,
2156 ) -> (DisplayPoint, DisplayPoint) {
2157 let scroll_position = self.snapshot.scroll_position();
2158 let position = position - text_bounds.origin();
2159 let y = position.y().max(0.0).min(self.size.y());
2160 let x = position.x() + (scroll_position.x() * self.em_width);
2161 let row = (y / self.line_height + scroll_position.y()) as u32;
2162 let (column, x_overshoot) = if let Some(line) = self
2163 .line_layouts
2164 .get(row as usize - scroll_position.y() as usize)
2165 {
2166 if let Some(ix) = line.index_for_x(x) {
2167 (ix as u32, 0.0)
2168 } else {
2169 (line.len() as u32, 0f32.max(x - line.width()))
2170 }
2171 } else {
2172 (0, x)
2173 };
2174
2175 let mut target_point = DisplayPoint::new(row, column);
2176 let point = self.snapshot.clip_point(target_point, Bias::Left);
2177 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2178
2179 (point, target_point)
2180 }
2181}
2182
2183struct BlockLayout {
2184 row: u32,
2185 element: ElementBox,
2186 style: BlockStyle,
2187}
2188
2189fn layout_line(
2190 row: u32,
2191 snapshot: &EditorSnapshot,
2192 style: &EditorStyle,
2193 layout_cache: &TextLayoutCache,
2194) -> text_layout::Line {
2195 let mut line = snapshot.line(row);
2196
2197 if line.len() > MAX_LINE_LEN {
2198 let mut len = MAX_LINE_LEN;
2199 while !line.is_char_boundary(len) {
2200 len -= 1;
2201 }
2202
2203 line.truncate(len);
2204 }
2205
2206 layout_cache.layout_str(
2207 &line,
2208 style.text.font_size,
2209 &[(
2210 snapshot.line_len(row) as usize,
2211 RunStyle {
2212 font_id: style.text.font_id,
2213 color: Color::black(),
2214 underline: Default::default(),
2215 },
2216 )],
2217 )
2218}
2219
2220#[derive(Debug)]
2221pub struct Cursor {
2222 origin: Vector2F,
2223 block_width: f32,
2224 line_height: f32,
2225 color: Color,
2226 shape: CursorShape,
2227 block_text: Option<Line>,
2228}
2229
2230impl Cursor {
2231 pub fn new(
2232 origin: Vector2F,
2233 block_width: f32,
2234 line_height: f32,
2235 color: Color,
2236 shape: CursorShape,
2237 block_text: Option<Line>,
2238 ) -> Cursor {
2239 Cursor {
2240 origin,
2241 block_width,
2242 line_height,
2243 color,
2244 shape,
2245 block_text,
2246 }
2247 }
2248
2249 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2250 RectF::new(
2251 self.origin + origin,
2252 vec2f(self.block_width, self.line_height),
2253 )
2254 }
2255
2256 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2257 let bounds = match self.shape {
2258 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2259 CursorShape::Block | CursorShape::Hollow => RectF::new(
2260 self.origin + origin,
2261 vec2f(self.block_width, self.line_height),
2262 ),
2263 CursorShape::Underscore => RectF::new(
2264 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2265 vec2f(self.block_width, 2.0),
2266 ),
2267 };
2268
2269 //Draw background or border quad
2270 if matches!(self.shape, CursorShape::Hollow) {
2271 cx.scene.push_quad(Quad {
2272 bounds,
2273 background: None,
2274 border: Border::all(1., self.color),
2275 corner_radius: 0.,
2276 });
2277 } else {
2278 cx.scene.push_quad(Quad {
2279 bounds,
2280 background: Some(self.color),
2281 border: Default::default(),
2282 corner_radius: 0.,
2283 });
2284 }
2285
2286 if let Some(block_text) = &self.block_text {
2287 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2288 }
2289 }
2290
2291 pub fn shape(&self) -> CursorShape {
2292 self.shape
2293 }
2294}
2295
2296#[derive(Debug)]
2297pub struct HighlightedRange {
2298 pub start_y: f32,
2299 pub line_height: f32,
2300 pub lines: Vec<HighlightedRangeLine>,
2301 pub color: Color,
2302 pub corner_radius: f32,
2303}
2304
2305#[derive(Debug)]
2306pub struct HighlightedRangeLine {
2307 pub start_x: f32,
2308 pub end_x: f32,
2309}
2310
2311impl HighlightedRange {
2312 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2313 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2314 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2315 self.paint_lines(
2316 self.start_y + self.line_height,
2317 &self.lines[1..],
2318 bounds,
2319 scene,
2320 );
2321 } else {
2322 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2323 }
2324 }
2325
2326 fn paint_lines(
2327 &self,
2328 start_y: f32,
2329 lines: &[HighlightedRangeLine],
2330 bounds: RectF,
2331 scene: &mut SceneBuilder,
2332 ) {
2333 if lines.is_empty() {
2334 return;
2335 }
2336
2337 let mut path = PathBuilder::new();
2338 let first_line = lines.first().unwrap();
2339 let last_line = lines.last().unwrap();
2340
2341 let first_top_left = vec2f(first_line.start_x, start_y);
2342 let first_top_right = vec2f(first_line.end_x, start_y);
2343
2344 let curve_height = vec2f(0., self.corner_radius);
2345 let curve_width = |start_x: f32, end_x: f32| {
2346 let max = (end_x - start_x) / 2.;
2347 let width = if max < self.corner_radius {
2348 max
2349 } else {
2350 self.corner_radius
2351 };
2352
2353 vec2f(width, 0.)
2354 };
2355
2356 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2357 path.reset(first_top_right - top_curve_width);
2358 path.curve_to(first_top_right + curve_height, first_top_right);
2359
2360 let mut iter = lines.iter().enumerate().peekable();
2361 while let Some((ix, line)) = iter.next() {
2362 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2363
2364 if let Some((_, next_line)) = iter.peek() {
2365 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2366
2367 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2368 Ordering::Equal => {
2369 path.line_to(bottom_right);
2370 }
2371 Ordering::Less => {
2372 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2373 path.line_to(bottom_right - curve_height);
2374 if self.corner_radius > 0. {
2375 path.curve_to(bottom_right - curve_width, bottom_right);
2376 }
2377 path.line_to(next_top_right + curve_width);
2378 if self.corner_radius > 0. {
2379 path.curve_to(next_top_right + curve_height, next_top_right);
2380 }
2381 }
2382 Ordering::Greater => {
2383 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2384 path.line_to(bottom_right - curve_height);
2385 if self.corner_radius > 0. {
2386 path.curve_to(bottom_right + curve_width, bottom_right);
2387 }
2388 path.line_to(next_top_right - curve_width);
2389 if self.corner_radius > 0. {
2390 path.curve_to(next_top_right + curve_height, next_top_right);
2391 }
2392 }
2393 }
2394 } else {
2395 let curve_width = curve_width(line.start_x, line.end_x);
2396 path.line_to(bottom_right - curve_height);
2397 if self.corner_radius > 0. {
2398 path.curve_to(bottom_right - curve_width, bottom_right);
2399 }
2400
2401 let bottom_left = vec2f(line.start_x, bottom_right.y());
2402 path.line_to(bottom_left + curve_width);
2403 if self.corner_radius > 0. {
2404 path.curve_to(bottom_left - curve_height, bottom_left);
2405 }
2406 }
2407 }
2408
2409 if first_line.start_x > last_line.start_x {
2410 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2411 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2412 path.line_to(second_top_left + curve_height);
2413 if self.corner_radius > 0. {
2414 path.curve_to(second_top_left + curve_width, second_top_left);
2415 }
2416 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2417 path.line_to(first_bottom_left - curve_width);
2418 if self.corner_radius > 0. {
2419 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2420 }
2421 }
2422
2423 path.line_to(first_top_left + curve_height);
2424 if self.corner_radius > 0. {
2425 path.curve_to(first_top_left + top_curve_width, first_top_left);
2426 }
2427 path.line_to(first_top_right - top_curve_width);
2428
2429 scene.push_path(path.build(self.color, Some(bounds)));
2430 }
2431}
2432
2433pub fn position_to_display_point(
2434 position: Vector2F,
2435 text_bounds: RectF,
2436 position_map: &PositionMap,
2437) -> Option<DisplayPoint> {
2438 if text_bounds.contains_point(position) {
2439 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2440 if point == target_point {
2441 Some(point)
2442 } else {
2443 None
2444 }
2445 } else {
2446 None
2447 }
2448}
2449
2450pub fn range_to_bounds(
2451 range: &Range<DisplayPoint>,
2452 content_origin: Vector2F,
2453 scroll_left: f32,
2454 scroll_top: f32,
2455 visible_row_range: &Range<u32>,
2456 line_end_overshoot: f32,
2457 position_map: &PositionMap,
2458) -> impl Iterator<Item = RectF> {
2459 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2460
2461 if range.start == range.end {
2462 return bounds.into_iter();
2463 }
2464
2465 let start_row = visible_row_range.start;
2466 let end_row = visible_row_range.end;
2467
2468 let row_range = if range.end.column() == 0 {
2469 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2470 } else {
2471 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2472 };
2473
2474 let first_y =
2475 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2476
2477 for (idx, row) in row_range.enumerate() {
2478 let line_layout = &position_map.line_layouts[(row - start_row) as usize];
2479
2480 let start_x = if row == range.start.row() {
2481 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2482 - scroll_left
2483 } else {
2484 content_origin.x() - scroll_left
2485 };
2486
2487 let end_x = if row == range.end.row() {
2488 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2489 } else {
2490 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2491 };
2492
2493 bounds.push(RectF::from_points(
2494 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2495 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2496 ))
2497 }
2498
2499 bounds.into_iter()
2500}
2501
2502pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2503 delta.powf(1.5) / 100.0
2504}
2505
2506fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2507 delta.powf(1.2) / 300.0
2508}
2509
2510#[cfg(test)]
2511mod tests {
2512 use std::sync::Arc;
2513
2514 use super::*;
2515 use crate::{
2516 display_map::{BlockDisposition, BlockProperties},
2517 Editor, MultiBuffer,
2518 };
2519 use settings::Settings;
2520 use util::test::sample_text;
2521
2522 #[gpui::test]
2523 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2524 cx.set_global(Settings::test(cx));
2525 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2526 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2527 Editor::new(EditorMode::Full, buffer, None, None, cx)
2528 });
2529 let element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2530
2531 let layouts = editor.update(cx, |editor, cx| {
2532 let snapshot = editor.snapshot(cx);
2533 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2534 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2535 element
2536 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, &layout_cx)
2537 .0
2538 });
2539 assert_eq!(layouts.len(), 6);
2540 }
2541
2542 #[gpui::test]
2543 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2544 cx.set_global(Settings::test(cx));
2545 let buffer = MultiBuffer::build_simple("", cx);
2546 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2547 Editor::new(EditorMode::Full, buffer, None, None, cx)
2548 });
2549
2550 editor.update(cx, |editor, cx| {
2551 editor.set_placeholder_text("hello", cx);
2552 editor.insert_blocks(
2553 [BlockProperties {
2554 style: BlockStyle::Fixed,
2555 disposition: BlockDisposition::Above,
2556 height: 3,
2557 position: Anchor::min(),
2558 render: Arc::new(|_| Empty::new().boxed()),
2559 }],
2560 cx,
2561 );
2562
2563 // Blur the editor so that it displays placeholder text.
2564 cx.blur();
2565 });
2566
2567 let mut element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2568
2569 let mut scene = SceneBuilder::new(1.0);
2570 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2571 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2572 let (size, mut state) = element.layout(
2573 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2574 &mut layout_cx,
2575 );
2576
2577 assert_eq!(state.position_map.line_layouts.len(), 4);
2578 assert_eq!(
2579 state
2580 .line_number_layouts
2581 .iter()
2582 .map(Option::is_some)
2583 .collect::<Vec<_>>(),
2584 &[false, false, false, true]
2585 );
2586
2587 // Don't panic.
2588 let bounds = RectF::new(Default::default(), size);
2589 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2590 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2591 }
2592}