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