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