1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, Select, SelectPhase, SoftWrap,
4 ToPoint, MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 git::{diff_hunk_to_display, DisplayDiffHunk},
9 hover_popover::{
10 HideHover, HoverAt, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
11 },
12 link_go_to_definition::{
13 GoToFetchedDefinition, GoToFetchedTypeDefinition, UpdateGoToDefinitionLink,
14 },
15 mouse_context_menu::DeployMouseContextMenu,
16 scroll::actions::Scroll,
17 EditorStyle, GutterHover, UnfoldAt,
18};
19use clock::ReplicaId;
20use collections::{BTreeMap, HashMap};
21use git::diff::DiffHunkStatus;
22use gpui::{
23 color::Color,
24 elements::*,
25 fonts::{HighlightStyle, Underline},
26 geometry::{
27 rect::RectF,
28 vector::{vec2f, Vector2F},
29 PathBuilder,
30 },
31 json::{self, ToJson},
32 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
33 text_layout::{self, Line, RunStyle, TextLayoutCache},
34 AppContext, Axis, Border, CursorRegion, Element, ElementBox, EventContext, LayoutContext,
35 MouseRegion, PaintContext, Quad, SceneBuilder, SizeConstraint, ViewContext, WeakViewHandle,
36};
37use itertools::Itertools;
38use json::json;
39use language::{Bias, CursorShape, DiagnosticSeverity, OffsetUtf16, Selection};
40use project::ProjectPath;
41use settings::{GitGutter, Settings};
42use smallvec::SmallVec;
43use std::{
44 cmp::{self, Ordering},
45 fmt::Write,
46 iter,
47 ops::{DerefMut, Range},
48 sync::Arc,
49};
50use workspace::item::Item;
51
52enum FoldMarkers {}
53
54struct SelectionLayout {
55 head: DisplayPoint,
56 cursor_shape: CursorShape,
57 range: Range<DisplayPoint>,
58}
59
60impl SelectionLayout {
61 fn new<T: ToPoint + ToDisplayPoint + Clone>(
62 selection: Selection<T>,
63 line_mode: bool,
64 cursor_shape: CursorShape,
65 map: &DisplaySnapshot,
66 ) -> Self {
67 if line_mode {
68 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
69 let point_range = map.expand_to_line(selection.range());
70 Self {
71 head: selection.head().to_display_point(map),
72 cursor_shape,
73 range: point_range.start.to_display_point(map)
74 ..point_range.end.to_display_point(map),
75 }
76 } else {
77 let selection = selection.map(|p| p.to_display_point(map));
78 Self {
79 head: selection.head(),
80 cursor_shape,
81 range: selection.range(),
82 }
83 }
84 }
85}
86
87#[derive(Clone)]
88pub struct EditorElement {
89 view: WeakViewHandle<Editor>,
90 style: Arc<EditorStyle>,
91}
92
93impl EditorElement {
94 pub fn new(view: WeakViewHandle<Editor>, style: EditorStyle) -> Self {
95 Self {
96 view,
97 style: Arc::new(style),
98 }
99 }
100
101 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
102 self.view.upgrade(cx).unwrap().read(cx)
103 }
104
105 fn update_view<F, T>(&self, cx: &mut AppContext, f: F) -> T
106 where
107 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
108 {
109 self.view.upgrade(cx).unwrap().update(cx, f)
110 }
111
112 fn snapshot(&self, cx: &mut AppContext) -> EditorSnapshot {
113 self.update_view(cx, |view, cx| view.snapshot(cx))
114 }
115
116 fn attach_mouse_handlers(
117 view: &WeakViewHandle<Editor>,
118 position_map: &Arc<PositionMap>,
119 has_popovers: bool,
120 visible_bounds: RectF,
121 text_bounds: RectF,
122 gutter_bounds: RectF,
123 bounds: RectF,
124 cx: &mut PaintContext,
125 ) {
126 enum EditorElementMouseHandlers {}
127 cx.scene.push_mouse_region(
128 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
129 .on_down(MouseButton::Left, {
130 let position_map = position_map.clone();
131 move |e, cx| {
132 if !Self::mouse_down(
133 e.platform_event,
134 position_map.as_ref(),
135 text_bounds,
136 gutter_bounds,
137 cx,
138 ) {
139 cx.propagate_event();
140 }
141 }
142 })
143 .on_down(MouseButton::Right, {
144 let position_map = position_map.clone();
145 move |e, cx| {
146 if !Self::mouse_right_down(
147 e.position,
148 position_map.as_ref(),
149 text_bounds,
150 cx,
151 ) {
152 cx.propagate_event();
153 }
154 }
155 })
156 .on_up(MouseButton::Left, {
157 let view = view.clone();
158 let position_map = position_map.clone();
159 move |e, cx| {
160 if !Self::mouse_up(
161 view.clone(),
162 e.position,
163 e.cmd,
164 e.shift,
165 position_map.as_ref(),
166 text_bounds,
167 cx,
168 ) {
169 cx.propagate_event()
170 }
171 }
172 })
173 .on_drag(MouseButton::Left, {
174 let view = view.clone();
175 let position_map = position_map.clone();
176 move |e, cx| {
177 if !Self::mouse_dragged(
178 view.clone(),
179 e.platform_event,
180 position_map.as_ref(),
181 text_bounds,
182 cx,
183 ) {
184 cx.propagate_event()
185 }
186 }
187 })
188 .on_move({
189 let position_map = position_map.clone();
190 move |e, cx| {
191 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
192 cx.propagate_event()
193 }
194 }
195 })
196 .on_move_out(move |_, cx| {
197 if has_popovers {
198 cx.dispatch_action(HideHover);
199 }
200 })
201 .on_scroll({
202 let position_map = position_map.clone();
203 move |e, cx| {
204 if !Self::scroll(
205 e.position,
206 *e.delta.raw(),
207 e.delta.precise(),
208 &position_map,
209 bounds,
210 cx,
211 ) {
212 cx.propagate_event()
213 }
214 }
215 }),
216 );
217
218 enum GutterHandlers {}
219 cx.scene.push_mouse_region(
220 MouseRegion::new::<GutterHandlers>(view.id(), view.id() + 1, gutter_bounds).on_hover(
221 |hover, cx| {
222 cx.dispatch_action(GutterHover {
223 hovered: hover.started,
224 })
225 },
226 ),
227 )
228 }
229
230 fn mouse_down(
231 MouseButtonEvent {
232 position,
233 modifiers:
234 Modifiers {
235 shift,
236 ctrl,
237 alt,
238 cmd,
239 ..
240 },
241 mut click_count,
242 ..
243 }: MouseButtonEvent,
244 position_map: &PositionMap,
245 text_bounds: RectF,
246 gutter_bounds: RectF,
247 cx: &mut EventContext,
248 ) -> bool {
249 if gutter_bounds.contains_point(position) {
250 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
251 } else if !text_bounds.contains_point(position) {
252 return false;
253 }
254
255 let (position, target_position) = position_map.point_for_position(text_bounds, position);
256
257 if shift && alt {
258 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
259 position,
260 goal_column: target_position.column(),
261 }));
262 } else if shift && !ctrl && !alt && !cmd {
263 cx.dispatch_action(Select(SelectPhase::Extend {
264 position,
265 click_count,
266 }));
267 } else {
268 cx.dispatch_action(Select(SelectPhase::Begin {
269 position,
270 add: alt,
271 click_count,
272 }));
273 }
274
275 true
276 }
277
278 fn mouse_right_down(
279 position: Vector2F,
280 position_map: &PositionMap,
281 text_bounds: RectF,
282 cx: &mut EventContext,
283 ) -> bool {
284 if !text_bounds.contains_point(position) {
285 return false;
286 }
287
288 let (point, _) = position_map.point_for_position(text_bounds, position);
289
290 cx.dispatch_action(DeployMouseContextMenu { position, point });
291 true
292 }
293
294 fn mouse_up(
295 view: WeakViewHandle<Editor>,
296 position: Vector2F,
297 cmd: bool,
298 shift: bool,
299 position_map: &PositionMap,
300 text_bounds: RectF,
301 cx: &mut EventContext,
302 ) -> bool {
303 let view = view.upgrade(cx.app).unwrap().read(cx.app);
304 let end_selection = view.has_pending_selection();
305 let pending_nonempty_selections = view.has_pending_nonempty_selection();
306
307 if end_selection {
308 cx.dispatch_action(Select(SelectPhase::End));
309 }
310
311 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
312 let (point, target_point) = position_map.point_for_position(text_bounds, position);
313
314 if point == target_point {
315 if shift {
316 cx.dispatch_action(GoToFetchedTypeDefinition { point });
317 } else {
318 cx.dispatch_action(GoToFetchedDefinition { point });
319 }
320
321 return true;
322 }
323 }
324
325 end_selection
326 }
327
328 fn mouse_dragged(
329 view: WeakViewHandle<Editor>,
330 MouseMovedEvent {
331 modifiers: Modifiers { cmd, shift, .. },
332 position,
333 ..
334 }: MouseMovedEvent,
335 position_map: &PositionMap,
336 text_bounds: RectF,
337 cx: &mut EventContext,
338 ) -> bool {
339 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
340 // Don't trigger hover popover if mouse is hovering over context menu
341 let point = if text_bounds.contains_point(position) {
342 let (point, target_point) = position_map.point_for_position(text_bounds, position);
343 if point == target_point {
344 Some(point)
345 } else {
346 None
347 }
348 } else {
349 None
350 };
351
352 cx.dispatch_action(UpdateGoToDefinitionLink {
353 point,
354 cmd_held: cmd,
355 shift_held: shift,
356 });
357
358 let view = view.upgrade(cx.app).unwrap().read(cx.app);
359 if view.has_pending_selection() {
360 let mut scroll_delta = Vector2F::zero();
361
362 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
363 let top = text_bounds.origin_y() + vertical_margin;
364 let bottom = text_bounds.lower_left().y() - vertical_margin;
365 if position.y() < top {
366 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
367 }
368 if position.y() > bottom {
369 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
370 }
371
372 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
373 let left = text_bounds.origin_x() + horizontal_margin;
374 let right = text_bounds.upper_right().x() - horizontal_margin;
375 if position.x() < left {
376 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
377 left - position.x(),
378 ))
379 }
380 if position.x() > right {
381 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
382 position.x() - right,
383 ))
384 }
385
386 let (position, target_position) =
387 position_map.point_for_position(text_bounds, position);
388
389 cx.dispatch_action(Select(SelectPhase::Update {
390 position,
391 goal_column: target_position.column(),
392 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
393 .clamp(Vector2F::zero(), position_map.scroll_max),
394 }));
395
396 cx.dispatch_action(HoverAt { point });
397 true
398 } else {
399 cx.dispatch_action(HoverAt { point });
400 false
401 }
402 }
403
404 fn mouse_moved(
405 MouseMovedEvent {
406 modifiers: Modifiers { shift, cmd, .. },
407 position,
408 ..
409 }: MouseMovedEvent,
410 position_map: &PositionMap,
411 text_bounds: RectF,
412 cx: &mut EventContext,
413 ) -> bool {
414 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
415 // Don't trigger hover popover if mouse is hovering over context menu
416 let point = position_to_display_point(position, text_bounds, position_map);
417
418 cx.dispatch_action(UpdateGoToDefinitionLink {
419 point,
420 cmd_held: cmd,
421 shift_held: shift,
422 });
423
424 cx.dispatch_action(HoverAt { point });
425
426 true
427 }
428
429 fn scroll(
430 position: Vector2F,
431 mut delta: Vector2F,
432 precise: bool,
433 position_map: &PositionMap,
434 bounds: RectF,
435 cx: &mut EventContext,
436 ) -> bool {
437 if !bounds.contains_point(position) {
438 return false;
439 }
440
441 let line_height = position_map.line_height;
442 let max_glyph_width = position_map.em_width;
443
444 let axis = if precise {
445 //Trackpad
446 position_map.snapshot.ongoing_scroll.filter(&mut delta)
447 } else {
448 //Not trackpad
449 delta *= vec2f(max_glyph_width, line_height);
450 None //Resets ongoing scroll
451 };
452
453 let scroll_position = position_map.snapshot.scroll_position();
454 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
455 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
456 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
457
458 cx.dispatch_action(Scroll {
459 scroll_position,
460 axis,
461 });
462
463 true
464 }
465
466 fn paint_background(
467 &self,
468 gutter_bounds: RectF,
469 text_bounds: RectF,
470 layout: &LayoutState,
471 cx: &mut PaintContext,
472 ) {
473 let bounds = gutter_bounds.union_rect(text_bounds);
474 let scroll_top =
475 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
476 cx.scene.push_quad(Quad {
477 bounds: gutter_bounds,
478 background: Some(self.style.gutter_background),
479 border: Border::new(0., Color::transparent_black()),
480 corner_radius: 0.,
481 });
482 cx.scene.push_quad(Quad {
483 bounds: text_bounds,
484 background: Some(self.style.background),
485 border: Border::new(0., Color::transparent_black()),
486 corner_radius: 0.,
487 });
488
489 if let EditorMode::Full = layout.mode {
490 let mut active_rows = layout.active_rows.iter().peekable();
491 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
492 let mut end_row = *start_row;
493 while active_rows.peek().map_or(false, |r| {
494 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
495 }) {
496 active_rows.next().unwrap();
497 end_row += 1;
498 }
499
500 if !contains_non_empty_selection {
501 let origin = vec2f(
502 bounds.origin_x(),
503 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
504 - scroll_top,
505 );
506 let size = vec2f(
507 bounds.width(),
508 layout.position_map.line_height * (end_row - start_row + 1) as f32,
509 );
510 cx.scene.push_quad(Quad {
511 bounds: RectF::new(origin, size),
512 background: Some(self.style.active_line_background),
513 border: Border::default(),
514 corner_radius: 0.,
515 });
516 }
517 }
518
519 if let Some(highlighted_rows) = &layout.highlighted_rows {
520 let origin = vec2f(
521 bounds.origin_x(),
522 bounds.origin_y()
523 + (layout.position_map.line_height * highlighted_rows.start as f32)
524 - scroll_top,
525 );
526 let size = vec2f(
527 bounds.width(),
528 layout.position_map.line_height * highlighted_rows.len() as f32,
529 );
530 cx.scene.push_quad(Quad {
531 bounds: RectF::new(origin, size),
532 background: Some(self.style.highlighted_line_background),
533 border: Border::default(),
534 corner_radius: 0.,
535 });
536 }
537 }
538 }
539
540 fn paint_gutter(
541 &mut self,
542 bounds: RectF,
543 visible_bounds: RectF,
544 layout: &mut LayoutState,
545 cx: &mut PaintContext,
546 ) {
547 let line_height = layout.position_map.line_height;
548
549 let scroll_position = layout.position_map.snapshot.scroll_position();
550 let scroll_top = scroll_position.y() * line_height;
551
552 let show_gutter = matches!(
553 &cx.global::<Settings>()
554 .git_overrides
555 .git_gutter
556 .unwrap_or_default(),
557 GitGutter::TrackedFiles
558 );
559
560 if show_gutter {
561 Self::paint_diff_hunks(bounds, layout, cx);
562 }
563
564 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
565 if let Some(line) = line {
566 let line_origin = bounds.origin()
567 + vec2f(
568 bounds.width() - line.width() - layout.gutter_padding,
569 ix as f32 * line_height - (scroll_top % line_height),
570 );
571
572 line.paint(line_origin, visible_bounds, line_height, cx);
573 }
574 }
575
576 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
577 if let Some(indicator) = fold_indicator.as_mut() {
578 let position = vec2f(
579 bounds.width() - layout.gutter_padding,
580 ix as f32 * line_height - (scroll_top % line_height),
581 );
582 let centering_offset = vec2f(
583 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
584 (line_height - indicator.size().y()) / 2.,
585 );
586
587 let indicator_origin = bounds.origin() + position + centering_offset;
588
589 indicator.paint(indicator_origin, visible_bounds, cx);
590 }
591 }
592
593 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
594 let mut x = 0.;
595 let mut y = *row as f32 * line_height - scroll_top;
596 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
597 y += (line_height - indicator.size().y()) / 2.;
598 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
599 }
600 }
601
602 fn paint_diff_hunks(bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
603 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
604 let line_height = layout.position_map.line_height;
605
606 let scroll_position = layout.position_map.snapshot.scroll_position();
607 let scroll_top = scroll_position.y() * line_height;
608
609 for hunk in &layout.display_hunks {
610 let (display_row_range, status) = match hunk {
611 //TODO: This rendering is entirely a horrible hack
612 &DisplayDiffHunk::Folded { display_row: row } => {
613 let start_y = row as f32 * line_height - scroll_top;
614 let end_y = start_y + line_height;
615
616 let width = diff_style.removed_width_em * line_height;
617 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
618 let highlight_size = vec2f(width * 2., end_y - start_y);
619 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
620
621 cx.scene.push_quad(Quad {
622 bounds: highlight_bounds,
623 background: Some(diff_style.modified),
624 border: Border::new(0., Color::transparent_black()),
625 corner_radius: 1. * line_height,
626 });
627
628 continue;
629 }
630
631 DisplayDiffHunk::Unfolded {
632 display_row_range,
633 status,
634 } => (display_row_range, status),
635 };
636
637 let color = match status {
638 DiffHunkStatus::Added => diff_style.inserted,
639 DiffHunkStatus::Modified => diff_style.modified,
640
641 //TODO: This rendering is entirely a horrible hack
642 DiffHunkStatus::Removed => {
643 let row = *display_row_range.start();
644
645 let offset = line_height / 2.;
646 let start_y = row as f32 * line_height - offset - scroll_top;
647 let end_y = start_y + line_height;
648
649 let width = diff_style.removed_width_em * line_height;
650 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
651 let highlight_size = vec2f(width * 2., end_y - start_y);
652 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
653
654 cx.scene.push_quad(Quad {
655 bounds: highlight_bounds,
656 background: Some(diff_style.deleted),
657 border: Border::new(0., Color::transparent_black()),
658 corner_radius: 1. * line_height,
659 });
660
661 continue;
662 }
663 };
664
665 let start_row = *display_row_range.start();
666 let end_row = *display_row_range.end();
667
668 let start_y = start_row as f32 * line_height - scroll_top;
669 let end_y = end_row as f32 * line_height - scroll_top + line_height;
670
671 let width = diff_style.width_em * line_height;
672 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
673 let highlight_size = vec2f(width * 2., end_y - start_y);
674 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
675
676 cx.scene.push_quad(Quad {
677 bounds: highlight_bounds,
678 background: Some(color),
679 border: Border::new(0., Color::transparent_black()),
680 corner_radius: diff_style.corner_radius * line_height,
681 });
682 }
683 }
684
685 fn paint_text(
686 &mut self,
687 bounds: RectF,
688 visible_bounds: RectF,
689 layout: &mut LayoutState,
690 cx: &mut PaintContext,
691 ) {
692 let view = self.view(cx.app);
693 let style = &self.style;
694 let local_replica_id = view.replica_id(cx);
695 let scroll_position = layout.position_map.snapshot.scroll_position();
696 let start_row = layout.visible_display_row_range.start;
697 let scroll_top = scroll_position.y() * layout.position_map.line_height;
698 let max_glyph_width = layout.position_map.em_width;
699 let scroll_left = scroll_position.x() * max_glyph_width;
700 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
701 let line_end_overshoot = 0.15 * layout.position_map.line_height;
702
703 cx.scene.push_layer(Some(bounds));
704
705 cx.scene.push_cursor_region(CursorRegion {
706 bounds,
707 style: if !view.link_go_to_definition_state.definitions.is_empty() {
708 CursorStyle::PointingHand
709 } else {
710 CursorStyle::IBeam
711 },
712 });
713
714 let fold_corner_radius =
715 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
716 for (id, range, color) in layout.fold_ranges.iter() {
717 self.paint_highlighted_range(
718 range.clone(),
719 *color,
720 fold_corner_radius,
721 fold_corner_radius * 2.,
722 layout,
723 content_origin,
724 scroll_top,
725 scroll_left,
726 bounds,
727 cx,
728 );
729
730 for bound in range_to_bounds(
731 &range,
732 content_origin,
733 scroll_left,
734 scroll_top,
735 &layout.visible_display_row_range,
736 line_end_overshoot,
737 &layout.position_map,
738 ) {
739 cx.scene.push_cursor_region(CursorRegion {
740 bounds: bound,
741 style: CursorStyle::PointingHand,
742 });
743
744 let display_row = range.start.row();
745
746 let buffer_row = DisplayPoint::new(display_row, 0)
747 .to_point(&layout.position_map.snapshot.display_snapshot)
748 .row;
749
750 cx.scene.push_mouse_region(
751 MouseRegion::new::<FoldMarkers>(self.view.id(), *id as usize, bound)
752 .on_click(MouseButton::Left, move |_, cx| {
753 cx.dispatch_action(UnfoldAt { buffer_row })
754 })
755 .with_notify_on_hover(true)
756 .with_notify_on_click(true),
757 )
758 }
759 }
760
761 for (range, color) in &layout.highlighted_ranges {
762 self.paint_highlighted_range(
763 range.clone(),
764 *color,
765 0.,
766 line_end_overshoot,
767 layout,
768 content_origin,
769 scroll_top,
770 scroll_left,
771 bounds,
772 cx,
773 );
774 }
775
776 let mut cursors = SmallVec::<[Cursor; 32]>::new();
777 let corner_radius = 0.15 * layout.position_map.line_height;
778
779 for (replica_id, selections) in &layout.selections {
780 let selection_style = style.replica_selection_style(*replica_id);
781
782 for selection in selections {
783 self.paint_highlighted_range(
784 selection.range.clone(),
785 selection_style.selection,
786 corner_radius,
787 corner_radius * 2.,
788 layout,
789 content_origin,
790 scroll_top,
791 scroll_left,
792 bounds,
793 cx,
794 );
795
796 if view.show_local_cursors(cx) || *replica_id != local_replica_id {
797 let cursor_position = selection.head;
798 if layout
799 .visible_display_row_range
800 .contains(&cursor_position.row())
801 {
802 let cursor_row_layout = &layout.position_map.line_layouts
803 [(cursor_position.row() - start_row) as usize];
804 let cursor_column = cursor_position.column() as usize;
805
806 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
807 let mut block_width =
808 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
809 if block_width == 0.0 {
810 block_width = layout.position_map.em_width;
811 }
812 let block_text = if let CursorShape::Block = selection.cursor_shape {
813 layout
814 .position_map
815 .snapshot
816 .chars_at(cursor_position)
817 .next()
818 .and_then(|(character, _)| {
819 let font_id =
820 cursor_row_layout.font_for_index(cursor_column)?;
821 let text = character.to_string();
822
823 Some(cx.text_layout_cache.layout_str(
824 &text,
825 cursor_row_layout.font_size(),
826 &[(
827 text.len(),
828 RunStyle {
829 font_id,
830 color: style.background,
831 underline: Default::default(),
832 },
833 )],
834 ))
835 })
836 } else {
837 None
838 };
839
840 let x = cursor_character_x - scroll_left;
841 let y = cursor_position.row() as f32 * layout.position_map.line_height
842 - scroll_top;
843 cursors.push(Cursor {
844 color: selection_style.cursor,
845 block_width,
846 origin: vec2f(x, y),
847 line_height: layout.position_map.line_height,
848 shape: selection.cursor_shape,
849 block_text,
850 });
851 }
852 }
853 }
854 }
855
856 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
857 // Draw glyphs
858 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
859 let row = start_row + ix as u32;
860 line.paint(
861 content_origin
862 + vec2f(
863 -scroll_left,
864 row as f32 * layout.position_map.line_height - scroll_top,
865 ),
866 visible_text_bounds,
867 layout.position_map.line_height,
868 cx,
869 );
870 }
871 }
872
873 cx.scene.push_layer(Some(bounds));
874 for cursor in cursors {
875 cursor.paint(content_origin, cx);
876 }
877 cx.scene.pop_layer();
878
879 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
880 cx.scene.push_stacking_context(None, None);
881 let cursor_row_layout =
882 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
883 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
884 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
885 let mut list_origin = content_origin + vec2f(x, y);
886 let list_width = context_menu.size().x();
887 let list_height = context_menu.size().y();
888
889 // Snap the right edge of the list to the right edge of the window if
890 // its horizontal bounds overflow.
891 if list_origin.x() + list_width > cx.window_size.x() {
892 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
893 }
894
895 if list_origin.y() + list_height > bounds.max_y() {
896 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
897 }
898
899 context_menu.paint(
900 list_origin,
901 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
902 cx,
903 );
904
905 cx.scene.pop_stacking_context();
906 }
907
908 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
909 cx.scene.push_stacking_context(None, None);
910
911 // This is safe because we check on layout whether the required row is available
912 let hovered_row_layout =
913 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
914
915 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
916 // height. This is the size we will use to decide whether to render popovers above or below
917 // the hovered line.
918 let first_size = hover_popovers[0].size();
919 let height_to_reserve = first_size.y()
920 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
921
922 // Compute Hovered Point
923 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
924 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
925 let hovered_point = content_origin + vec2f(x, y);
926
927 if hovered_point.y() - height_to_reserve > 0.0 {
928 // There is enough space above. Render popovers above the hovered point
929 let mut current_y = hovered_point.y();
930 for hover_popover in hover_popovers {
931 let size = hover_popover.size();
932 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
933
934 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
935 if x_out_of_bounds < 0.0 {
936 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
937 }
938
939 hover_popover.paint(
940 popover_origin,
941 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
942 cx,
943 );
944
945 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
946 }
947 } else {
948 // There is not enough space above. Render popovers below the hovered point
949 let mut current_y = hovered_point.y() + layout.position_map.line_height;
950 for hover_popover in hover_popovers {
951 let size = hover_popover.size();
952 let mut popover_origin = vec2f(hovered_point.x(), current_y);
953
954 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
955 if x_out_of_bounds < 0.0 {
956 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
957 }
958
959 hover_popover.paint(
960 popover_origin,
961 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
962 cx,
963 );
964
965 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
966 }
967 }
968
969 cx.scene.pop_stacking_context();
970 }
971
972 cx.scene.pop_layer();
973 }
974
975 fn paint_scrollbar(&mut self, bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
976 enum ScrollbarMouseHandlers {}
977 if layout.mode != EditorMode::Full {
978 return;
979 }
980
981 let view = self.view.clone();
982 let style = &self.style.theme.scrollbar;
983
984 let top = bounds.min_y();
985 let bottom = bounds.max_y();
986 let right = bounds.max_x();
987 let left = right - style.width;
988 let row_range = &layout.scrollbar_row_range;
989 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
990
991 let mut height = bounds.height();
992 let mut first_row_y_offset = 0.0;
993
994 // Impose a minimum height on the scrollbar thumb
995 let min_thumb_height =
996 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
997 let thumb_height = (row_range.end - row_range.start) * height / max_row;
998 if thumb_height < min_thumb_height {
999 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1000 height -= min_thumb_height - thumb_height;
1001 }
1002
1003 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
1004
1005 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1006 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1007 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1008 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1009
1010 if layout.show_scrollbars {
1011 cx.scene.push_quad(Quad {
1012 bounds: track_bounds,
1013 border: style.track.border,
1014 background: style.track.background_color,
1015 ..Default::default()
1016 });
1017 cx.scene.push_quad(Quad {
1018 bounds: thumb_bounds,
1019 border: style.thumb.border,
1020 background: style.thumb.background_color,
1021 corner_radius: style.thumb.corner_radius,
1022 });
1023 }
1024
1025 cx.scene.push_cursor_region(CursorRegion {
1026 bounds: track_bounds,
1027 style: CursorStyle::Arrow,
1028 });
1029 cx.scene.push_mouse_region(
1030 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
1031 .on_move({
1032 let view = view.clone();
1033 move |_, cx| {
1034 if let Some(view) = view.upgrade(cx.deref_mut()) {
1035 view.update(cx.deref_mut(), |view, cx| {
1036 view.scroll_manager.show_scrollbar(cx);
1037 });
1038 }
1039 }
1040 })
1041 .on_down(MouseButton::Left, {
1042 let view = view.clone();
1043 let row_range = row_range.clone();
1044 move |e, cx| {
1045 let y = e.position.y();
1046 if let Some(view) = view.upgrade(cx.deref_mut()) {
1047 view.update(cx.deref_mut(), |view, cx| {
1048 if y < thumb_top || thumb_bottom < y {
1049 let center_row =
1050 ((y - top) * max_row as f32 / height).round() as u32;
1051 let top_row = center_row.saturating_sub(
1052 (row_range.end - row_range.start) as u32 / 2,
1053 );
1054 let mut position = view.scroll_position(cx);
1055 position.set_y(top_row as f32);
1056 view.set_scroll_position(position, cx);
1057 } else {
1058 view.scroll_manager.show_scrollbar(cx);
1059 }
1060 });
1061 }
1062 }
1063 })
1064 .on_drag(MouseButton::Left, {
1065 let view = view.clone();
1066 move |e, cx| {
1067 let y = e.prev_mouse_position.y();
1068 let new_y = e.position.y();
1069 if thumb_top < y && y < thumb_bottom {
1070 if let Some(view) = view.upgrade(cx.deref_mut()) {
1071 view.update(cx.deref_mut(), |view, cx| {
1072 let mut position = view.scroll_position(cx);
1073 position.set_y(
1074 position.y() + (new_y - y) * (max_row as f32) / height,
1075 );
1076 if position.y() < 0.0 {
1077 position.set_y(0.);
1078 }
1079 view.set_scroll_position(position, cx);
1080 });
1081 }
1082 }
1083 }
1084 }),
1085 );
1086 }
1087
1088 #[allow(clippy::too_many_arguments)]
1089 fn paint_highlighted_range(
1090 &self,
1091 range: Range<DisplayPoint>,
1092 color: Color,
1093 corner_radius: f32,
1094 line_end_overshoot: f32,
1095 layout: &LayoutState,
1096 content_origin: Vector2F,
1097 scroll_top: f32,
1098 scroll_left: f32,
1099 bounds: RectF,
1100 cx: &mut PaintContext,
1101 ) {
1102 let start_row = layout.visible_display_row_range.start;
1103 let end_row = layout.visible_display_row_range.end;
1104 if range.start != range.end {
1105 let row_range = if range.end.column() == 0 {
1106 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1107 } else {
1108 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1109 };
1110
1111 let highlighted_range = HighlightedRange {
1112 color,
1113 line_height: layout.position_map.line_height,
1114 corner_radius,
1115 start_y: content_origin.y()
1116 + row_range.start as f32 * layout.position_map.line_height
1117 - scroll_top,
1118 lines: row_range
1119 .into_iter()
1120 .map(|row| {
1121 let line_layout =
1122 &layout.position_map.line_layouts[(row - start_row) as usize];
1123 HighlightedRangeLine {
1124 start_x: if row == range.start.row() {
1125 content_origin.x()
1126 + line_layout.x_for_index(range.start.column() as usize)
1127 - scroll_left
1128 } else {
1129 content_origin.x() - scroll_left
1130 },
1131 end_x: if row == range.end.row() {
1132 content_origin.x()
1133 + line_layout.x_for_index(range.end.column() as usize)
1134 - scroll_left
1135 } else {
1136 content_origin.x() + line_layout.width() + line_end_overshoot
1137 - scroll_left
1138 },
1139 }
1140 })
1141 .collect(),
1142 };
1143
1144 highlighted_range.paint(bounds, cx.scene);
1145 }
1146 }
1147
1148 fn paint_blocks(
1149 &mut self,
1150 bounds: RectF,
1151 visible_bounds: RectF,
1152 layout: &mut LayoutState,
1153 cx: &mut PaintContext,
1154 ) {
1155 let scroll_position = layout.position_map.snapshot.scroll_position();
1156 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1157 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1158
1159 for block in &mut layout.blocks {
1160 let mut origin = bounds.origin()
1161 + vec2f(
1162 0.,
1163 block.row as f32 * layout.position_map.line_height - scroll_top,
1164 );
1165 if !matches!(block.style, BlockStyle::Sticky) {
1166 origin += vec2f(-scroll_left, 0.);
1167 }
1168 block.element.paint(origin, visible_bounds, cx);
1169 }
1170 }
1171
1172 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1173 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1174 let style = &self.style;
1175
1176 cx.text_layout_cache
1177 .layout_str(
1178 "1".repeat(digit_count).as_str(),
1179 style.text.font_size,
1180 &[(
1181 digit_count,
1182 RunStyle {
1183 font_id: style.text.font_id,
1184 color: Color::black(),
1185 underline: Default::default(),
1186 },
1187 )],
1188 )
1189 .width()
1190 }
1191
1192 //Folds contained in a hunk are ignored apart from shrinking visual size
1193 //If a fold contains any hunks then that fold line is marked as modified
1194 fn layout_git_gutters(
1195 &self,
1196 display_rows: Range<u32>,
1197 snapshot: &EditorSnapshot,
1198 ) -> Vec<DisplayDiffHunk> {
1199 let buffer_snapshot = &snapshot.buffer_snapshot;
1200
1201 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1202 .to_point(snapshot)
1203 .row;
1204 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1205 .to_point(snapshot)
1206 .row;
1207
1208 buffer_snapshot
1209 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row, false)
1210 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1211 .dedup()
1212 .collect()
1213 }
1214
1215 fn layout_line_numbers(
1216 &self,
1217 rows: Range<u32>,
1218 active_rows: &BTreeMap<u32, bool>,
1219 is_singleton: bool,
1220 snapshot: &EditorSnapshot,
1221 cx: &LayoutContext,
1222 ) -> (
1223 Vec<Option<text_layout::Line>>,
1224 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1225 ) {
1226 let style = &self.style;
1227 let include_line_numbers = snapshot.mode == EditorMode::Full;
1228 let mut line_number_layouts = Vec::with_capacity(rows.len());
1229 let mut fold_statuses = Vec::with_capacity(rows.len());
1230 let mut line_number = String::new();
1231 for (ix, row) in snapshot
1232 .buffer_rows(rows.start)
1233 .take((rows.end - rows.start) as usize)
1234 .enumerate()
1235 {
1236 let display_row = rows.start + ix as u32;
1237 let (active, color) = if active_rows.contains_key(&display_row) {
1238 (true, style.line_number_active)
1239 } else {
1240 (false, style.line_number)
1241 };
1242 if let Some(buffer_row) = row {
1243 if include_line_numbers {
1244 line_number.clear();
1245 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1246 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1247 &line_number,
1248 style.text.font_size,
1249 &[(
1250 line_number.len(),
1251 RunStyle {
1252 font_id: style.text.font_id,
1253 color,
1254 underline: Default::default(),
1255 },
1256 )],
1257 )));
1258 fold_statuses.push(
1259 is_singleton
1260 .then(|| {
1261 snapshot
1262 .fold_for_line(buffer_row)
1263 .map(|fold_status| (fold_status, buffer_row, active))
1264 })
1265 .flatten(),
1266 )
1267 }
1268 } else {
1269 fold_statuses.push(None);
1270 line_number_layouts.push(None);
1271 }
1272 }
1273
1274 (line_number_layouts, fold_statuses)
1275 }
1276
1277 fn layout_lines(
1278 &mut self,
1279 rows: Range<u32>,
1280 snapshot: &EditorSnapshot,
1281 cx: &LayoutContext,
1282 ) -> Vec<text_layout::Line> {
1283 if rows.start >= rows.end {
1284 return Vec::new();
1285 }
1286
1287 // When the editor is empty and unfocused, then show the placeholder.
1288 if snapshot.is_empty() {
1289 let placeholder_style = self
1290 .style
1291 .placeholder_text
1292 .as_ref()
1293 .unwrap_or(&self.style.text);
1294 let placeholder_text = snapshot.placeholder_text();
1295 let placeholder_lines = placeholder_text
1296 .as_ref()
1297 .map_or("", AsRef::as_ref)
1298 .split('\n')
1299 .skip(rows.start as usize)
1300 .chain(iter::repeat(""))
1301 .take(rows.len());
1302 placeholder_lines
1303 .map(|line| {
1304 cx.text_layout_cache.layout_str(
1305 line,
1306 placeholder_style.font_size,
1307 &[(
1308 line.len(),
1309 RunStyle {
1310 font_id: placeholder_style.font_id,
1311 color: placeholder_style.color,
1312 underline: Default::default(),
1313 },
1314 )],
1315 )
1316 })
1317 .collect()
1318 } else {
1319 let style = &self.style;
1320 let chunks = snapshot
1321 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1322 .map(|chunk| {
1323 let mut highlight_style = chunk
1324 .syntax_highlight_id
1325 .and_then(|id| id.style(&style.syntax));
1326
1327 if let Some(chunk_highlight) = chunk.highlight_style {
1328 if let Some(highlight_style) = highlight_style.as_mut() {
1329 highlight_style.highlight(chunk_highlight);
1330 } else {
1331 highlight_style = Some(chunk_highlight);
1332 }
1333 }
1334
1335 let mut diagnostic_highlight = HighlightStyle::default();
1336
1337 if chunk.is_unnecessary {
1338 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1339 }
1340
1341 if let Some(severity) = chunk.diagnostic_severity {
1342 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1343 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1344 let diagnostic_style = super::diagnostic_style(severity, true, style);
1345 diagnostic_highlight.underline = Some(Underline {
1346 color: Some(diagnostic_style.message.text.color),
1347 thickness: 1.0.into(),
1348 squiggly: true,
1349 });
1350 }
1351 }
1352
1353 if let Some(highlight_style) = highlight_style.as_mut() {
1354 highlight_style.highlight(diagnostic_highlight);
1355 } else {
1356 highlight_style = Some(diagnostic_highlight);
1357 }
1358
1359 (chunk.text, highlight_style)
1360 });
1361 layout_highlighted_chunks(
1362 chunks,
1363 &style.text,
1364 cx.text_layout_cache,
1365 cx.font_cache,
1366 MAX_LINE_LEN,
1367 rows.len() as usize,
1368 )
1369 }
1370 }
1371
1372 #[allow(clippy::too_many_arguments)]
1373 fn layout_blocks(
1374 &mut self,
1375 rows: Range<u32>,
1376 snapshot: &EditorSnapshot,
1377 editor_width: f32,
1378 scroll_width: f32,
1379 gutter_padding: f32,
1380 gutter_width: f32,
1381 em_width: f32,
1382 text_x: f32,
1383 line_height: f32,
1384 style: &EditorStyle,
1385 line_layouts: &[text_layout::Line],
1386 include_root: bool,
1387 cx: &mut LayoutContext,
1388 ) -> (f32, Vec<BlockLayout>) {
1389 let editor = if let Some(editor) = self.view.upgrade(cx) {
1390 editor
1391 } else {
1392 return Default::default();
1393 };
1394
1395 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1396 let scroll_x = snapshot.scroll_anchor.offset.x();
1397 let (fixed_blocks, non_fixed_blocks) = snapshot
1398 .blocks_in_range(rows.clone())
1399 .partition::<Vec<_>, _>(|(_, block)| match block {
1400 TransformBlock::ExcerptHeader { .. } => false,
1401 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1402 });
1403 let mut render_block = |block: &TransformBlock, width: f32| {
1404 let mut element = match block {
1405 TransformBlock::Custom(block) => {
1406 let align_to = block
1407 .position()
1408 .to_point(&snapshot.buffer_snapshot)
1409 .to_display_point(snapshot);
1410 let anchor_x = text_x
1411 + if rows.contains(&align_to.row()) {
1412 line_layouts[(align_to.row() - rows.start) as usize]
1413 .x_for_index(align_to.column() as usize)
1414 } else {
1415 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1416 .x_for_index(align_to.column() as usize)
1417 };
1418
1419 cx.render(&editor, |_, cx| {
1420 block.render(&mut BlockContext {
1421 cx,
1422 anchor_x,
1423 gutter_padding,
1424 line_height,
1425 scroll_x,
1426 gutter_width,
1427 em_width,
1428 })
1429 })
1430 }
1431 TransformBlock::ExcerptHeader {
1432 id,
1433 buffer,
1434 range,
1435 starts_new_buffer,
1436 ..
1437 } => {
1438 let id = *id;
1439 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1440 let jump_position = range
1441 .primary
1442 .as_ref()
1443 .map_or(range.context.start, |primary| primary.start);
1444 let jump_action = crate::Jump {
1445 path: ProjectPath {
1446 worktree_id: file.worktree_id(cx),
1447 path: file.path.clone(),
1448 },
1449 position: language::ToPoint::to_point(&jump_position, buffer),
1450 anchor: jump_position,
1451 };
1452
1453 enum JumpIcon {}
1454 cx.render(&editor, |_, cx| {
1455 MouseEventHandler::<JumpIcon>::new(id.into(), cx, |state, _| {
1456 let style = style.jump_icon.style_for(state, false);
1457 Svg::new("icons/arrow_up_right_8.svg")
1458 .with_color(style.color)
1459 .constrained()
1460 .with_width(style.icon_width)
1461 .aligned()
1462 .contained()
1463 .with_style(style.container)
1464 .constrained()
1465 .with_width(style.button_width)
1466 .with_height(style.button_width)
1467 .boxed()
1468 })
1469 .with_cursor_style(CursorStyle::PointingHand)
1470 .on_click(MouseButton::Left, move |_, cx| {
1471 cx.dispatch_action(jump_action.clone())
1472 })
1473 .with_tooltip::<JumpIcon, _>(
1474 id.into(),
1475 "Jump to Buffer".to_string(),
1476 Some(Box::new(crate::OpenExcerpts)),
1477 tooltip_style.clone(),
1478 cx,
1479 )
1480 .aligned()
1481 .flex_float()
1482 .boxed()
1483 })
1484 });
1485
1486 if *starts_new_buffer {
1487 let style = &self.style.diagnostic_path_header;
1488 let font_size =
1489 (style.text_scale_factor * self.style.text.font_size).round();
1490
1491 let path = buffer.resolve_file_path(cx, include_root);
1492 let mut filename = None;
1493 let mut parent_path = None;
1494 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
1495 if let Some(path) = path {
1496 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1497 parent_path =
1498 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1499 }
1500
1501 Flex::row()
1502 .with_child(
1503 Label::new(
1504 filename.unwrap_or_else(|| "untitled".to_string()),
1505 style.filename.text.clone().with_font_size(font_size),
1506 )
1507 .contained()
1508 .with_style(style.filename.container)
1509 .aligned()
1510 .boxed(),
1511 )
1512 .with_children(parent_path.map(|path| {
1513 Label::new(path, style.path.text.clone().with_font_size(font_size))
1514 .contained()
1515 .with_style(style.path.container)
1516 .aligned()
1517 .boxed()
1518 }))
1519 .with_children(jump_icon)
1520 .contained()
1521 .with_style(style.container)
1522 .with_padding_left(gutter_padding)
1523 .with_padding_right(gutter_padding)
1524 .expanded()
1525 .named("path header block")
1526 } else {
1527 let text_style = self.style.text.clone();
1528 Flex::row()
1529 .with_child(Label::new("⋯", text_style).boxed())
1530 .with_children(jump_icon)
1531 .contained()
1532 .with_padding_left(gutter_padding)
1533 .with_padding_right(gutter_padding)
1534 .expanded()
1535 .named("collapsed context")
1536 }
1537 }
1538 };
1539
1540 element.layout(
1541 SizeConstraint {
1542 min: Vector2F::zero(),
1543 max: vec2f(width, block.height() as f32 * line_height),
1544 },
1545 cx,
1546 );
1547 element
1548 };
1549
1550 let mut fixed_block_max_width = 0f32;
1551 let mut blocks = Vec::new();
1552 for (row, block) in fixed_blocks {
1553 let element = render_block(block, f32::INFINITY);
1554 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1555 blocks.push(BlockLayout {
1556 row,
1557 element,
1558 style: BlockStyle::Fixed,
1559 });
1560 }
1561 for (row, block) in non_fixed_blocks {
1562 let style = match block {
1563 TransformBlock::Custom(block) => block.style(),
1564 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1565 };
1566 let width = match style {
1567 BlockStyle::Sticky => editor_width,
1568 BlockStyle::Flex => editor_width
1569 .max(fixed_block_max_width)
1570 .max(gutter_width + scroll_width),
1571 BlockStyle::Fixed => unreachable!(),
1572 };
1573 let element = render_block(block, width);
1574 blocks.push(BlockLayout {
1575 row,
1576 element,
1577 style,
1578 });
1579 }
1580 (
1581 scroll_width.max(fixed_block_max_width - gutter_width),
1582 blocks,
1583 )
1584 }
1585}
1586
1587impl Element for EditorElement {
1588 type LayoutState = LayoutState;
1589 type PaintState = ();
1590
1591 fn layout(
1592 &mut self,
1593 constraint: SizeConstraint,
1594 cx: &mut LayoutContext,
1595 ) -> (Vector2F, Self::LayoutState) {
1596 let mut size = constraint.max;
1597 if size.x().is_infinite() {
1598 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1599 }
1600
1601 let snapshot = self.snapshot(cx.app);
1602 let style = self.style.clone();
1603 let line_height = style.text.line_height(cx.font_cache);
1604
1605 let gutter_padding;
1606 let gutter_width;
1607 let gutter_margin;
1608 if snapshot.mode == EditorMode::Full {
1609 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1610 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1611 gutter_margin = -style.text.descent(cx.font_cache);
1612 } else {
1613 gutter_padding = 0.0;
1614 gutter_width = 0.0;
1615 gutter_margin = 0.0;
1616 };
1617
1618 let text_width = size.x() - gutter_width;
1619 let em_width = style.text.em_width(cx.font_cache);
1620 let em_advance = style.text.em_advance(cx.font_cache);
1621 let overscroll = vec2f(em_width, 0.);
1622 let snapshot = self.update_view(cx.app, |view, cx| {
1623 view.set_visible_line_count(size.y() / line_height);
1624
1625 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1626 let wrap_width = match view.soft_wrap_mode(cx) {
1627 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1628 SoftWrap::EditorWidth => editor_width,
1629 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1630 };
1631
1632 if view.set_wrap_width(Some(wrap_width), cx) {
1633 view.snapshot(cx)
1634 } else {
1635 snapshot
1636 }
1637 });
1638
1639 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1640 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1641 size.set_y(
1642 scroll_height
1643 .min(constraint.max_along(Axis::Vertical))
1644 .max(constraint.min_along(Axis::Vertical))
1645 .min(line_height * max_lines as f32),
1646 )
1647 } else if let EditorMode::SingleLine = snapshot.mode {
1648 size.set_y(
1649 line_height
1650 .min(constraint.max_along(Axis::Vertical))
1651 .max(constraint.min_along(Axis::Vertical)),
1652 )
1653 } else if size.y().is_infinite() {
1654 size.set_y(scroll_height);
1655 }
1656 let gutter_size = vec2f(gutter_width, size.y());
1657 let text_size = vec2f(text_width, size.y());
1658
1659 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1660 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1661 let snapshot = view.snapshot(cx);
1662 (autoscroll_horizontally, snapshot)
1663 });
1664
1665 let scroll_position = snapshot.scroll_position();
1666 // The scroll position is a fractional point, the whole number of which represents
1667 // the top of the window in terms of display rows.
1668 let start_row = scroll_position.y() as u32;
1669 let height_in_lines = size.y() / line_height;
1670 let max_row = snapshot.max_point().row();
1671
1672 // Add 1 to ensure selections bleed off screen
1673 let end_row = 1 + cmp::min(
1674 (scroll_position.y() + height_in_lines).ceil() as u32,
1675 max_row,
1676 );
1677
1678 let start_anchor = if start_row == 0 {
1679 Anchor::min()
1680 } else {
1681 snapshot
1682 .buffer_snapshot
1683 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1684 };
1685 let end_anchor = if end_row > max_row {
1686 Anchor::max()
1687 } else {
1688 snapshot
1689 .buffer_snapshot
1690 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1691 };
1692
1693 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1694 let mut active_rows = BTreeMap::new();
1695 let mut highlighted_rows = None;
1696 let mut highlighted_ranges = Vec::new();
1697 let mut fold_ranges = Vec::new();
1698 let mut show_scrollbars = false;
1699 let mut include_root = false;
1700 let mut is_singleton = false;
1701 self.update_view(cx.app, |view, cx| {
1702 is_singleton = view.is_singleton(cx);
1703
1704 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1705
1706 highlighted_rows = view.highlighted_rows();
1707 let theme = cx.global::<Settings>().theme.as_ref();
1708 highlighted_ranges =
1709 view.background_highlights_in_range(start_anchor..end_anchor, &display_map, theme);
1710
1711 fold_ranges.extend(
1712 snapshot
1713 .folds_in_range(start_anchor..end_anchor)
1714 .map(|anchor| {
1715 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1716 (
1717 start.row,
1718 start.to_display_point(&snapshot.display_snapshot)
1719 ..anchor.end.to_display_point(&snapshot),
1720 )
1721 }),
1722 );
1723
1724 let mut remote_selections = HashMap::default();
1725 for (replica_id, line_mode, cursor_shape, selection) in display_map
1726 .buffer_snapshot
1727 .remote_selections_in_range(&(start_anchor..end_anchor))
1728 {
1729 // The local selections match the leader's selections.
1730 if Some(replica_id) == view.leader_replica_id {
1731 continue;
1732 }
1733 remote_selections
1734 .entry(replica_id)
1735 .or_insert(Vec::new())
1736 .push(SelectionLayout::new(
1737 selection,
1738 line_mode,
1739 cursor_shape,
1740 &display_map,
1741 ));
1742 }
1743 selections.extend(remote_selections);
1744
1745 if view.show_local_selections {
1746 let mut local_selections = view
1747 .selections
1748 .disjoint_in_range(start_anchor..end_anchor, cx);
1749 local_selections.extend(view.selections.pending(cx));
1750 for selection in &local_selections {
1751 let is_empty = selection.start == selection.end;
1752 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1753 let selection_end = snapshot.next_line_boundary(selection.end).1;
1754 for row in cmp::max(selection_start.row(), start_row)
1755 ..=cmp::min(selection_end.row(), end_row)
1756 {
1757 let contains_non_empty_selection =
1758 active_rows.entry(row).or_insert(!is_empty);
1759 *contains_non_empty_selection |= !is_empty;
1760 }
1761 }
1762
1763 // Render the local selections in the leader's color when following.
1764 let local_replica_id = view
1765 .leader_replica_id
1766 .unwrap_or_else(|| view.replica_id(cx));
1767
1768 selections.push((
1769 local_replica_id,
1770 local_selections
1771 .into_iter()
1772 .map(|selection| {
1773 SelectionLayout::new(
1774 selection,
1775 view.selections.line_mode,
1776 view.cursor_shape,
1777 &display_map,
1778 )
1779 })
1780 .collect(),
1781 ));
1782 }
1783
1784 show_scrollbars = view.scroll_manager.scrollbars_visible();
1785 include_root = view
1786 .project
1787 .as_ref()
1788 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
1789 .unwrap_or_default()
1790 });
1791
1792 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
1793 .into_iter()
1794 .map(|(id, fold)| {
1795 let color = self
1796 .style
1797 .folds
1798 .ellipses
1799 .background
1800 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
1801 .color;
1802
1803 (id, fold, color)
1804 })
1805 .collect();
1806
1807 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
1808 start_row..end_row,
1809 &active_rows,
1810 is_singleton,
1811 &snapshot,
1812 cx,
1813 );
1814
1815 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1816
1817 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1818
1819 let mut max_visible_line_width = 0.0;
1820 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1821 for line in &line_layouts {
1822 if line.width() > max_visible_line_width {
1823 max_visible_line_width = line.width();
1824 }
1825 }
1826
1827 let style = self.style.clone();
1828 let longest_line_width = layout_line(
1829 snapshot.longest_row(),
1830 &snapshot,
1831 &style,
1832 cx.text_layout_cache,
1833 )
1834 .width();
1835 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1836 let em_width = style.text.em_width(cx.font_cache);
1837 let (scroll_width, blocks) = self.layout_blocks(
1838 start_row..end_row,
1839 &snapshot,
1840 size.x(),
1841 scroll_width,
1842 gutter_padding,
1843 gutter_width,
1844 em_width,
1845 gutter_width + gutter_margin,
1846 line_height,
1847 &style,
1848 &line_layouts,
1849 include_root,
1850 cx,
1851 );
1852
1853 let scroll_max = vec2f(
1854 ((scroll_width - text_size.x()) / em_width).max(0.0),
1855 max_row as f32,
1856 );
1857
1858 self.update_view(cx.app, |view, cx| {
1859 let clamped = view.scroll_manager.clamp_scroll_left(scroll_max.x());
1860
1861 let autoscrolled = if autoscroll_horizontally {
1862 view.autoscroll_horizontally(
1863 start_row,
1864 text_size.x(),
1865 scroll_width,
1866 em_width,
1867 &line_layouts,
1868 cx,
1869 )
1870 } else {
1871 false
1872 };
1873
1874 if clamped || autoscrolled {
1875 snapshot = view.snapshot(cx);
1876 }
1877 });
1878
1879 let mut context_menu = None;
1880 let mut code_actions_indicator = None;
1881 let mut hover = None;
1882 let mut mode = EditorMode::Full;
1883 let mut fold_indicators = cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1884 let newest_selection_head = view
1885 .selections
1886 .newest::<usize>(cx)
1887 .head()
1888 .to_display_point(&snapshot);
1889
1890 let style = view.style(cx);
1891 if (start_row..end_row).contains(&newest_selection_head.row()) {
1892 if view.context_menu_visible() {
1893 context_menu =
1894 view.render_context_menu(newest_selection_head, style.clone(), cx);
1895 }
1896
1897 let active = matches!(view.context_menu, Some(crate::ContextMenu::CodeActions(_)));
1898
1899 code_actions_indicator = view
1900 .render_code_actions_indicator(&style, active, cx)
1901 .map(|indicator| (newest_selection_head.row(), indicator));
1902 }
1903
1904 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1905 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1906 mode = view.mode;
1907
1908 view.render_fold_indicators(
1909 fold_statuses,
1910 &style,
1911 view.gutter_hovered,
1912 line_height,
1913 gutter_margin,
1914 cx,
1915 )
1916 });
1917
1918 if let Some((_, context_menu)) = context_menu.as_mut() {
1919 context_menu.layout(
1920 SizeConstraint {
1921 min: Vector2F::zero(),
1922 max: vec2f(
1923 cx.window_size.x() * 0.7,
1924 (12. * line_height).min((size.y() - line_height) / 2.),
1925 ),
1926 },
1927 cx,
1928 );
1929 }
1930
1931 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1932 indicator.layout(
1933 SizeConstraint::strict_along(
1934 Axis::Vertical,
1935 line_height * style.code_actions.vertical_scale,
1936 ),
1937 cx,
1938 );
1939 }
1940
1941 for fold_indicator in fold_indicators.iter_mut() {
1942 if let Some(indicator) = fold_indicator.as_mut() {
1943 indicator.layout(
1944 SizeConstraint::strict_along(
1945 Axis::Vertical,
1946 line_height * style.code_actions.vertical_scale,
1947 ),
1948 cx,
1949 );
1950 }
1951 }
1952
1953 if let Some((_, hover_popovers)) = hover.as_mut() {
1954 for hover_popover in hover_popovers.iter_mut() {
1955 hover_popover.layout(
1956 SizeConstraint {
1957 min: Vector2F::zero(),
1958 max: vec2f(
1959 (120. * em_width) // Default size
1960 .min(size.x() / 2.) // Shrink to half of the editor width
1961 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1962 (16. * line_height) // Default size
1963 .min(size.y() / 2.) // Shrink to half of the editor height
1964 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1965 ),
1966 },
1967 cx,
1968 );
1969 }
1970 }
1971
1972 (
1973 size,
1974 LayoutState {
1975 mode,
1976 position_map: Arc::new(PositionMap {
1977 size,
1978 scroll_max,
1979 line_layouts,
1980 line_height,
1981 em_width,
1982 em_advance,
1983 snapshot,
1984 }),
1985 visible_display_row_range: start_row..end_row,
1986 gutter_size,
1987 gutter_padding,
1988 text_size,
1989 scrollbar_row_range,
1990 show_scrollbars,
1991 max_row,
1992 gutter_margin,
1993 active_rows,
1994 highlighted_rows,
1995 highlighted_ranges,
1996 fold_ranges,
1997 line_number_layouts,
1998 display_hunks,
1999 blocks,
2000 selections,
2001 context_menu,
2002 code_actions_indicator,
2003 fold_indicators,
2004 hover_popovers: hover,
2005 },
2006 )
2007 }
2008
2009 fn paint(
2010 &mut self,
2011 bounds: RectF,
2012 visible_bounds: RectF,
2013 layout: &mut Self::LayoutState,
2014 cx: &mut PaintContext,
2015 ) -> Self::PaintState {
2016 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2017 cx.scene.push_layer(Some(visible_bounds));
2018
2019 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2020 let text_bounds = RectF::new(
2021 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2022 layout.text_size,
2023 );
2024
2025 Self::attach_mouse_handlers(
2026 &self.view,
2027 &layout.position_map,
2028 layout.hover_popovers.is_some(),
2029 visible_bounds,
2030 text_bounds,
2031 gutter_bounds,
2032 bounds,
2033 cx,
2034 );
2035
2036 self.paint_background(gutter_bounds, text_bounds, layout, cx);
2037 if layout.gutter_size.x() > 0. {
2038 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
2039 }
2040 self.paint_text(text_bounds, visible_bounds, layout, cx);
2041
2042 cx.scene.push_layer(Some(bounds));
2043 if !layout.blocks.is_empty() {
2044 self.paint_blocks(bounds, visible_bounds, layout, cx);
2045 }
2046 self.paint_scrollbar(bounds, layout, cx);
2047 cx.scene.pop_layer();
2048
2049 cx.scene.pop_layer();
2050 }
2051
2052 fn rect_for_text_range(
2053 &self,
2054 range_utf16: Range<usize>,
2055 bounds: RectF,
2056 _: RectF,
2057 layout: &Self::LayoutState,
2058 _: &Self::PaintState,
2059 _: &gpui::MeasurementContext,
2060 ) -> Option<RectF> {
2061 let text_bounds = RectF::new(
2062 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2063 layout.text_size,
2064 );
2065 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2066 let scroll_position = layout.position_map.snapshot.scroll_position();
2067 let start_row = scroll_position.y() as u32;
2068 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2069 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2070
2071 let range_start = OffsetUtf16(range_utf16.start)
2072 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2073 if range_start.row() < start_row {
2074 return None;
2075 }
2076
2077 let line = layout
2078 .position_map
2079 .line_layouts
2080 .get((range_start.row() - start_row) as usize)?;
2081 let range_start_x = line.x_for_index(range_start.column() as usize);
2082 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2083 Some(RectF::new(
2084 content_origin
2085 + vec2f(
2086 range_start_x,
2087 range_start_y + layout.position_map.line_height,
2088 )
2089 - vec2f(scroll_left, scroll_top),
2090 vec2f(
2091 layout.position_map.em_width,
2092 layout.position_map.line_height,
2093 ),
2094 ))
2095 }
2096
2097 fn debug(
2098 &self,
2099 bounds: RectF,
2100 _: &Self::LayoutState,
2101 _: &Self::PaintState,
2102 _: &gpui::DebugContext,
2103 ) -> json::Value {
2104 json!({
2105 "type": "BufferElement",
2106 "bounds": bounds.to_json()
2107 })
2108 }
2109}
2110
2111type BufferRow = u32;
2112
2113pub struct LayoutState {
2114 position_map: Arc<PositionMap>,
2115 gutter_size: Vector2F,
2116 gutter_padding: f32,
2117 gutter_margin: f32,
2118 text_size: Vector2F,
2119 mode: EditorMode,
2120 visible_display_row_range: Range<u32>,
2121 active_rows: BTreeMap<u32, bool>,
2122 highlighted_rows: Option<Range<u32>>,
2123 line_number_layouts: Vec<Option<text_layout::Line>>,
2124 display_hunks: Vec<DisplayDiffHunk>,
2125 blocks: Vec<BlockLayout>,
2126 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2127 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2128 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2129 scrollbar_row_range: Range<f32>,
2130 show_scrollbars: bool,
2131 max_row: u32,
2132 context_menu: Option<(DisplayPoint, ElementBox)>,
2133 code_actions_indicator: Option<(u32, ElementBox)>,
2134 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
2135 fold_indicators: Vec<Option<ElementBox>>,
2136}
2137
2138pub struct PositionMap {
2139 size: Vector2F,
2140 line_height: f32,
2141 scroll_max: Vector2F,
2142 em_width: f32,
2143 em_advance: f32,
2144 line_layouts: Vec<text_layout::Line>,
2145 snapshot: EditorSnapshot,
2146}
2147
2148impl PositionMap {
2149 /// Returns two display points:
2150 /// 1. The nearest *valid* position in the editor
2151 /// 2. An unclipped, potentially *invalid* position that maps directly to
2152 /// the given pixel position.
2153 fn point_for_position(
2154 &self,
2155 text_bounds: RectF,
2156 position: Vector2F,
2157 ) -> (DisplayPoint, DisplayPoint) {
2158 let scroll_position = self.snapshot.scroll_position();
2159 let position = position - text_bounds.origin();
2160 let y = position.y().max(0.0).min(self.size.y());
2161 let x = position.x() + (scroll_position.x() * self.em_width);
2162 let row = (y / self.line_height + scroll_position.y()) as u32;
2163 let (column, x_overshoot) = if let Some(line) = self
2164 .line_layouts
2165 .get(row as usize - scroll_position.y() as usize)
2166 {
2167 if let Some(ix) = line.index_for_x(x) {
2168 (ix as u32, 0.0)
2169 } else {
2170 (line.len() as u32, 0f32.max(x - line.width()))
2171 }
2172 } else {
2173 (0, x)
2174 };
2175
2176 let mut target_point = DisplayPoint::new(row, column);
2177 let point = self.snapshot.clip_point(target_point, Bias::Left);
2178 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2179
2180 (point, target_point)
2181 }
2182}
2183
2184struct BlockLayout {
2185 row: u32,
2186 element: ElementBox,
2187 style: BlockStyle,
2188}
2189
2190fn layout_line(
2191 row: u32,
2192 snapshot: &EditorSnapshot,
2193 style: &EditorStyle,
2194 layout_cache: &TextLayoutCache,
2195) -> text_layout::Line {
2196 let mut line = snapshot.line(row);
2197
2198 if line.len() > MAX_LINE_LEN {
2199 let mut len = MAX_LINE_LEN;
2200 while !line.is_char_boundary(len) {
2201 len -= 1;
2202 }
2203
2204 line.truncate(len);
2205 }
2206
2207 layout_cache.layout_str(
2208 &line,
2209 style.text.font_size,
2210 &[(
2211 snapshot.line_len(row) as usize,
2212 RunStyle {
2213 font_id: style.text.font_id,
2214 color: Color::black(),
2215 underline: Default::default(),
2216 },
2217 )],
2218 )
2219}
2220
2221#[derive(Debug)]
2222pub struct Cursor {
2223 origin: Vector2F,
2224 block_width: f32,
2225 line_height: f32,
2226 color: Color,
2227 shape: CursorShape,
2228 block_text: Option<Line>,
2229}
2230
2231impl Cursor {
2232 pub fn new(
2233 origin: Vector2F,
2234 block_width: f32,
2235 line_height: f32,
2236 color: Color,
2237 shape: CursorShape,
2238 block_text: Option<Line>,
2239 ) -> Cursor {
2240 Cursor {
2241 origin,
2242 block_width,
2243 line_height,
2244 color,
2245 shape,
2246 block_text,
2247 }
2248 }
2249
2250 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2251 RectF::new(
2252 self.origin + origin,
2253 vec2f(self.block_width, self.line_height),
2254 )
2255 }
2256
2257 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2258 let bounds = match self.shape {
2259 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2260 CursorShape::Block | CursorShape::Hollow => RectF::new(
2261 self.origin + origin,
2262 vec2f(self.block_width, self.line_height),
2263 ),
2264 CursorShape::Underscore => RectF::new(
2265 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2266 vec2f(self.block_width, 2.0),
2267 ),
2268 };
2269
2270 //Draw background or border quad
2271 if matches!(self.shape, CursorShape::Hollow) {
2272 cx.scene.push_quad(Quad {
2273 bounds,
2274 background: None,
2275 border: Border::all(1., self.color),
2276 corner_radius: 0.,
2277 });
2278 } else {
2279 cx.scene.push_quad(Quad {
2280 bounds,
2281 background: Some(self.color),
2282 border: Default::default(),
2283 corner_radius: 0.,
2284 });
2285 }
2286
2287 if let Some(block_text) = &self.block_text {
2288 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2289 }
2290 }
2291
2292 pub fn shape(&self) -> CursorShape {
2293 self.shape
2294 }
2295}
2296
2297#[derive(Debug)]
2298pub struct HighlightedRange {
2299 pub start_y: f32,
2300 pub line_height: f32,
2301 pub lines: Vec<HighlightedRangeLine>,
2302 pub color: Color,
2303 pub corner_radius: f32,
2304}
2305
2306#[derive(Debug)]
2307pub struct HighlightedRangeLine {
2308 pub start_x: f32,
2309 pub end_x: f32,
2310}
2311
2312impl HighlightedRange {
2313 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2314 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2315 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2316 self.paint_lines(
2317 self.start_y + self.line_height,
2318 &self.lines[1..],
2319 bounds,
2320 scene,
2321 );
2322 } else {
2323 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2324 }
2325 }
2326
2327 fn paint_lines(
2328 &self,
2329 start_y: f32,
2330 lines: &[HighlightedRangeLine],
2331 bounds: RectF,
2332 scene: &mut SceneBuilder,
2333 ) {
2334 if lines.is_empty() {
2335 return;
2336 }
2337
2338 let mut path = PathBuilder::new();
2339 let first_line = lines.first().unwrap();
2340 let last_line = lines.last().unwrap();
2341
2342 let first_top_left = vec2f(first_line.start_x, start_y);
2343 let first_top_right = vec2f(first_line.end_x, start_y);
2344
2345 let curve_height = vec2f(0., self.corner_radius);
2346 let curve_width = |start_x: f32, end_x: f32| {
2347 let max = (end_x - start_x) / 2.;
2348 let width = if max < self.corner_radius {
2349 max
2350 } else {
2351 self.corner_radius
2352 };
2353
2354 vec2f(width, 0.)
2355 };
2356
2357 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2358 path.reset(first_top_right - top_curve_width);
2359 path.curve_to(first_top_right + curve_height, first_top_right);
2360
2361 let mut iter = lines.iter().enumerate().peekable();
2362 while let Some((ix, line)) = iter.next() {
2363 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2364
2365 if let Some((_, next_line)) = iter.peek() {
2366 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2367
2368 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2369 Ordering::Equal => {
2370 path.line_to(bottom_right);
2371 }
2372 Ordering::Less => {
2373 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2374 path.line_to(bottom_right - curve_height);
2375 if self.corner_radius > 0. {
2376 path.curve_to(bottom_right - curve_width, bottom_right);
2377 }
2378 path.line_to(next_top_right + curve_width);
2379 if self.corner_radius > 0. {
2380 path.curve_to(next_top_right + curve_height, next_top_right);
2381 }
2382 }
2383 Ordering::Greater => {
2384 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2385 path.line_to(bottom_right - curve_height);
2386 if self.corner_radius > 0. {
2387 path.curve_to(bottom_right + curve_width, bottom_right);
2388 }
2389 path.line_to(next_top_right - curve_width);
2390 if self.corner_radius > 0. {
2391 path.curve_to(next_top_right + curve_height, next_top_right);
2392 }
2393 }
2394 }
2395 } else {
2396 let curve_width = curve_width(line.start_x, line.end_x);
2397 path.line_to(bottom_right - curve_height);
2398 if self.corner_radius > 0. {
2399 path.curve_to(bottom_right - curve_width, bottom_right);
2400 }
2401
2402 let bottom_left = vec2f(line.start_x, bottom_right.y());
2403 path.line_to(bottom_left + curve_width);
2404 if self.corner_radius > 0. {
2405 path.curve_to(bottom_left - curve_height, bottom_left);
2406 }
2407 }
2408 }
2409
2410 if first_line.start_x > last_line.start_x {
2411 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2412 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2413 path.line_to(second_top_left + curve_height);
2414 if self.corner_radius > 0. {
2415 path.curve_to(second_top_left + curve_width, second_top_left);
2416 }
2417 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2418 path.line_to(first_bottom_left - curve_width);
2419 if self.corner_radius > 0. {
2420 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2421 }
2422 }
2423
2424 path.line_to(first_top_left + curve_height);
2425 if self.corner_radius > 0. {
2426 path.curve_to(first_top_left + top_curve_width, first_top_left);
2427 }
2428 path.line_to(first_top_right - top_curve_width);
2429
2430 scene.push_path(path.build(self.color, Some(bounds)));
2431 }
2432}
2433
2434pub fn position_to_display_point(
2435 position: Vector2F,
2436 text_bounds: RectF,
2437 position_map: &PositionMap,
2438) -> Option<DisplayPoint> {
2439 if text_bounds.contains_point(position) {
2440 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2441 if point == target_point {
2442 Some(point)
2443 } else {
2444 None
2445 }
2446 } else {
2447 None
2448 }
2449}
2450
2451pub fn range_to_bounds(
2452 range: &Range<DisplayPoint>,
2453 content_origin: Vector2F,
2454 scroll_left: f32,
2455 scroll_top: f32,
2456 visible_row_range: &Range<u32>,
2457 line_end_overshoot: f32,
2458 position_map: &PositionMap,
2459) -> impl Iterator<Item = RectF> {
2460 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2461
2462 if range.start == range.end {
2463 return bounds.into_iter();
2464 }
2465
2466 let start_row = visible_row_range.start;
2467 let end_row = visible_row_range.end;
2468
2469 let row_range = if range.end.column() == 0 {
2470 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2471 } else {
2472 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2473 };
2474
2475 let first_y =
2476 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2477
2478 for (idx, row) in row_range.enumerate() {
2479 let line_layout = &position_map.line_layouts[(row - start_row) as usize];
2480
2481 let start_x = if row == range.start.row() {
2482 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2483 - scroll_left
2484 } else {
2485 content_origin.x() - scroll_left
2486 };
2487
2488 let end_x = if row == range.end.row() {
2489 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2490 } else {
2491 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2492 };
2493
2494 bounds.push(RectF::from_points(
2495 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2496 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2497 ))
2498 }
2499
2500 bounds.into_iter()
2501}
2502
2503pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2504 delta.powf(1.5) / 100.0
2505}
2506
2507fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2508 delta.powf(1.2) / 300.0
2509}
2510
2511#[cfg(test)]
2512mod tests {
2513 use std::sync::Arc;
2514
2515 use super::*;
2516 use crate::{
2517 display_map::{BlockDisposition, BlockProperties},
2518 Editor, MultiBuffer,
2519 };
2520 use settings::Settings;
2521 use util::test::sample_text;
2522
2523 #[gpui::test]
2524 fn test_layout_line_numbers(cx: &mut gpui::AppContext) {
2525 cx.set_global(Settings::test(cx));
2526 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2527 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2528 Editor::new(EditorMode::Full, buffer, None, None, cx)
2529 });
2530 let element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2531
2532 let layouts = editor.update(cx, |editor, cx| {
2533 let snapshot = editor.snapshot(cx);
2534 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2535 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2536 element
2537 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, &layout_cx)
2538 .0
2539 });
2540 assert_eq!(layouts.len(), 6);
2541 }
2542
2543 #[gpui::test]
2544 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::AppContext) {
2545 cx.set_global(Settings::test(cx));
2546 let buffer = MultiBuffer::build_simple("", cx);
2547 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2548 Editor::new(EditorMode::Full, buffer, None, None, cx)
2549 });
2550
2551 editor.update(cx, |editor, cx| {
2552 editor.set_placeholder_text("hello", cx);
2553 editor.insert_blocks(
2554 [BlockProperties {
2555 style: BlockStyle::Fixed,
2556 disposition: BlockDisposition::Above,
2557 height: 3,
2558 position: Anchor::min(),
2559 render: Arc::new(|_| Empty::new().boxed()),
2560 }],
2561 cx,
2562 );
2563
2564 // Blur the editor so that it displays placeholder text.
2565 cx.blur();
2566 });
2567
2568 let mut element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2569
2570 let mut scene = SceneBuilder::new(1.0);
2571 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2572 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2573 let (size, mut state) = element.layout(
2574 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2575 &mut layout_cx,
2576 );
2577
2578 assert_eq!(state.position_map.line_layouts.len(), 4);
2579 assert_eq!(
2580 state
2581 .line_number_layouts
2582 .iter()
2583 .map(Option::is_some)
2584 .collect::<Vec<_>>(),
2585 &[false, false, false, true]
2586 );
2587
2588 // Don't panic.
2589 let bounds = RectF::new(Default::default(), size);
2590 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2591 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2592 }
2593}