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