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