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