1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, Scroll, Select, SelectPhase,
4 SoftWrap, ToPoint, MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, TransformBlock},
8 hover_popover::{
9 HoverAt, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 link_go_to_definition::{
12 CmdShiftChanged, GoToFetchedDefinition, GoToFetchedTypeDefinition, UpdateGoToDefinitionLink,
13 },
14 mouse_context_menu::DeployMouseContextMenu,
15 EditorStyle,
16};
17use clock::ReplicaId;
18use collections::{BTreeMap, HashMap};
19use git::diff::{DiffHunk, DiffHunkStatus};
20use gpui::{
21 color::Color,
22 elements::*,
23 fonts::{HighlightStyle, Underline},
24 geometry::{
25 rect::RectF,
26 vector::{vec2f, Vector2F},
27 PathBuilder,
28 },
29 json::{self, ToJson},
30 platform::CursorStyle,
31 text_layout::{self, Line, RunStyle, TextLayoutCache},
32 AppContext, Axis, Border, CursorRegion, Element, ElementBox, Event, EventContext,
33 LayoutContext, ModifiersChangedEvent, MouseButton, MouseButtonEvent, MouseMovedEvent,
34 MouseRegion, MutableAppContext, PaintContext, Quad, Scene, SizeConstraint, ViewContext,
35 WeakViewHandle,
36};
37use json::json;
38use language::{Bias, DiagnosticSeverity, OffsetUtf16, Selection};
39use project::ProjectPath;
40use settings::{GitGutter, Settings};
41use smallvec::SmallVec;
42use std::{
43 cmp::{self, Ordering},
44 fmt::Write,
45 iter,
46 ops::{DerefMut, Range},
47 sync::Arc,
48};
49use theme::DiffStyle;
50
51struct SelectionLayout {
52 head: DisplayPoint,
53 range: Range<DisplayPoint>,
54}
55
56impl SelectionLayout {
57 fn new<T: ToPoint + ToDisplayPoint + Clone>(
58 selection: Selection<T>,
59 line_mode: bool,
60 map: &DisplaySnapshot,
61 ) -> Self {
62 if line_mode {
63 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
64 let point_range = map.expand_to_line(selection.range());
65 Self {
66 head: selection.head().to_display_point(map),
67 range: point_range.start.to_display_point(map)
68 ..point_range.end.to_display_point(map),
69 }
70 } else {
71 let selection = selection.map(|p| p.to_display_point(map));
72 Self {
73 head: selection.head(),
74 range: selection.range(),
75 }
76 }
77 }
78}
79
80#[derive(Clone)]
81pub struct EditorElement {
82 view: WeakViewHandle<Editor>,
83 style: Arc<EditorStyle>,
84 cursor_shape: CursorShape,
85}
86
87impl EditorElement {
88 pub fn new(
89 view: WeakViewHandle<Editor>,
90 style: EditorStyle,
91 cursor_shape: CursorShape,
92 ) -> Self {
93 Self {
94 view,
95 style: Arc::new(style),
96 cursor_shape,
97 }
98 }
99
100 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
101 self.view.upgrade(cx).unwrap().read(cx)
102 }
103
104 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
105 where
106 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
107 {
108 self.view.upgrade(cx).unwrap().update(cx, f)
109 }
110
111 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
112 self.update_view(cx, |view, cx| view.snapshot(cx))
113 }
114
115 fn attach_mouse_handlers(
116 view: &WeakViewHandle<Editor>,
117 position_map: &Arc<PositionMap>,
118 visible_bounds: RectF,
119 text_bounds: RectF,
120 gutter_bounds: RectF,
121 bounds: RectF,
122 cx: &mut PaintContext,
123 ) {
124 enum EditorElementMouseHandlers {}
125 cx.scene.push_mouse_region(
126 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
127 .on_down(MouseButton::Left, {
128 let position_map = position_map.clone();
129 move |e, cx| {
130 if !Self::mouse_down(
131 e.platform_event,
132 position_map.as_ref(),
133 text_bounds,
134 gutter_bounds,
135 cx,
136 ) {
137 cx.propogate_event();
138 }
139 }
140 })
141 .on_down(MouseButton::Right, {
142 let position_map = position_map.clone();
143 move |e, cx| {
144 if !Self::mouse_right_down(
145 e.position,
146 position_map.as_ref(),
147 text_bounds,
148 cx,
149 ) {
150 cx.propogate_event();
151 }
152 }
153 })
154 .on_up(MouseButton::Left, {
155 let view = view.clone();
156 let position_map = position_map.clone();
157 move |e, cx| {
158 if !Self::mouse_up(
159 view.clone(),
160 e.position,
161 e.cmd,
162 e.shift,
163 position_map.as_ref(),
164 text_bounds,
165 cx,
166 ) {
167 cx.propogate_event()
168 }
169 }
170 })
171 .on_drag(MouseButton::Left, {
172 let view = view.clone();
173 let position_map = position_map.clone();
174 move |e, cx| {
175 if !Self::mouse_dragged(
176 view.clone(),
177 e.platform_event,
178 position_map.as_ref(),
179 text_bounds,
180 cx,
181 ) {
182 cx.propogate_event()
183 }
184 }
185 })
186 .on_move({
187 let position_map = position_map.clone();
188 move |e, cx| {
189 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
190 cx.propogate_event()
191 }
192 }
193 })
194 .on_scroll({
195 let position_map = position_map.clone();
196 move |e, cx| {
197 if !Self::scroll(e.position, e.delta, e.precise, &position_map, bounds, cx)
198 {
199 cx.propogate_event()
200 }
201 }
202 }),
203 );
204 }
205
206 fn mouse_down(
207 MouseButtonEvent {
208 position,
209 ctrl,
210 alt,
211 shift,
212 cmd,
213 mut click_count,
214 ..
215 }: MouseButtonEvent,
216 position_map: &PositionMap,
217 text_bounds: RectF,
218 gutter_bounds: RectF,
219 cx: &mut EventContext,
220 ) -> bool {
221 if gutter_bounds.contains_point(position) {
222 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
223 } else if !text_bounds.contains_point(position) {
224 return false;
225 }
226
227 let (position, target_position) = position_map.point_for_position(text_bounds, position);
228
229 if shift && alt {
230 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
231 position,
232 goal_column: target_position.column(),
233 }));
234 } else if shift && !ctrl && !alt && !cmd {
235 cx.dispatch_action(Select(SelectPhase::Extend {
236 position,
237 click_count,
238 }));
239 } else {
240 cx.dispatch_action(Select(SelectPhase::Begin {
241 position,
242 add: alt,
243 click_count,
244 }));
245 }
246
247 true
248 }
249
250 fn mouse_right_down(
251 position: Vector2F,
252 position_map: &PositionMap,
253 text_bounds: RectF,
254 cx: &mut EventContext,
255 ) -> bool {
256 if !text_bounds.contains_point(position) {
257 return false;
258 }
259
260 let (point, _) = position_map.point_for_position(text_bounds, position);
261
262 cx.dispatch_action(DeployMouseContextMenu { position, point });
263 true
264 }
265
266 fn mouse_up(
267 view: WeakViewHandle<Editor>,
268 position: Vector2F,
269 cmd: bool,
270 shift: bool,
271 position_map: &PositionMap,
272 text_bounds: RectF,
273 cx: &mut EventContext,
274 ) -> bool {
275 let view = view.upgrade(cx.app).unwrap().read(cx.app);
276 let end_selection = view.has_pending_selection();
277 let pending_nonempty_selections = view.has_pending_nonempty_selection();
278
279 if end_selection {
280 cx.dispatch_action(Select(SelectPhase::End));
281 }
282
283 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
284 let (point, target_point) = position_map.point_for_position(text_bounds, position);
285
286 if point == target_point {
287 if shift {
288 cx.dispatch_action(GoToFetchedTypeDefinition { point });
289 } else {
290 cx.dispatch_action(GoToFetchedDefinition { point });
291 }
292
293 return true;
294 }
295 }
296
297 end_selection
298 }
299
300 fn mouse_dragged(
301 view: WeakViewHandle<Editor>,
302 MouseMovedEvent {
303 cmd,
304 shift,
305 position,
306 ..
307 }: MouseMovedEvent,
308 position_map: &PositionMap,
309 text_bounds: RectF,
310 cx: &mut EventContext,
311 ) -> bool {
312 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
313 // Don't trigger hover popover if mouse is hovering over context menu
314 let point = if text_bounds.contains_point(position) {
315 let (point, target_point) = position_map.point_for_position(text_bounds, position);
316 if point == target_point {
317 Some(point)
318 } else {
319 None
320 }
321 } else {
322 None
323 };
324
325 cx.dispatch_action(UpdateGoToDefinitionLink {
326 point,
327 cmd_held: cmd,
328 shift_held: shift,
329 });
330
331 let view = view.upgrade(cx.app).unwrap().read(cx.app);
332 if view.has_pending_selection() {
333 let mut scroll_delta = Vector2F::zero();
334
335 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
336 let top = text_bounds.origin_y() + vertical_margin;
337 let bottom = text_bounds.lower_left().y() - vertical_margin;
338 if position.y() < top {
339 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
340 }
341 if position.y() > bottom {
342 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
343 }
344
345 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
346 let left = text_bounds.origin_x() + horizontal_margin;
347 let right = text_bounds.upper_right().x() - horizontal_margin;
348 if position.x() < left {
349 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
350 left - position.x(),
351 ))
352 }
353 if position.x() > right {
354 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
355 position.x() - right,
356 ))
357 }
358
359 let (position, target_position) =
360 position_map.point_for_position(text_bounds, position);
361
362 cx.dispatch_action(Select(SelectPhase::Update {
363 position,
364 goal_column: target_position.column(),
365 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
366 .clamp(Vector2F::zero(), position_map.scroll_max),
367 }));
368
369 cx.dispatch_action(HoverAt { point });
370 true
371 } else {
372 cx.dispatch_action(HoverAt { point });
373 false
374 }
375 }
376
377 fn mouse_moved(
378 MouseMovedEvent {
379 cmd,
380 shift,
381 position,
382 ..
383 }: MouseMovedEvent,
384 position_map: &PositionMap,
385 text_bounds: RectF,
386 cx: &mut EventContext,
387 ) -> bool {
388 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
389 // Don't trigger hover popover if mouse is hovering over context menu
390 let point = if text_bounds.contains_point(position) {
391 let (point, target_point) = position_map.point_for_position(text_bounds, position);
392 if point == target_point {
393 Some(point)
394 } else {
395 None
396 }
397 } else {
398 None
399 };
400
401 cx.dispatch_action(UpdateGoToDefinitionLink {
402 point,
403 cmd_held: cmd,
404 shift_held: shift,
405 });
406
407 cx.dispatch_action(HoverAt { point });
408 true
409 }
410
411 fn modifiers_changed(&self, event: ModifiersChangedEvent, cx: &mut EventContext) -> bool {
412 cx.dispatch_action(CmdShiftChanged {
413 cmd_down: event.cmd,
414 shift_down: event.shift,
415 });
416 false
417 }
418
419 fn scroll(
420 position: Vector2F,
421 mut delta: Vector2F,
422 precise: bool,
423 position_map: &PositionMap,
424 bounds: RectF,
425 cx: &mut EventContext,
426 ) -> bool {
427 if !bounds.contains_point(position) {
428 return false;
429 }
430
431 let max_glyph_width = position_map.em_width;
432 if !precise {
433 delta *= vec2f(max_glyph_width, position_map.line_height);
434 }
435
436 let scroll_position = position_map.snapshot.scroll_position();
437 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
438 let y =
439 (scroll_position.y() * position_map.line_height - delta.y()) / position_map.line_height;
440 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
441
442 cx.dispatch_action(Scroll(scroll_position));
443
444 true
445 }
446
447 fn paint_background(
448 &self,
449 gutter_bounds: RectF,
450 text_bounds: RectF,
451 layout: &LayoutState,
452 cx: &mut PaintContext,
453 ) {
454 let bounds = gutter_bounds.union_rect(text_bounds);
455 let scroll_top =
456 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
457 cx.scene.push_quad(Quad {
458 bounds: gutter_bounds,
459 background: Some(self.style.gutter_background),
460 border: Border::new(0., Color::transparent_black()),
461 corner_radius: 0.,
462 });
463 cx.scene.push_quad(Quad {
464 bounds: text_bounds,
465 background: Some(self.style.background),
466 border: Border::new(0., Color::transparent_black()),
467 corner_radius: 0.,
468 });
469
470 if let EditorMode::Full = layout.mode {
471 let mut active_rows = layout.active_rows.iter().peekable();
472 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
473 let mut end_row = *start_row;
474 while active_rows.peek().map_or(false, |r| {
475 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
476 }) {
477 active_rows.next().unwrap();
478 end_row += 1;
479 }
480
481 if !contains_non_empty_selection {
482 let origin = vec2f(
483 bounds.origin_x(),
484 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
485 - scroll_top,
486 );
487 let size = vec2f(
488 bounds.width(),
489 layout.position_map.line_height * (end_row - start_row + 1) as f32,
490 );
491 cx.scene.push_quad(Quad {
492 bounds: RectF::new(origin, size),
493 background: Some(self.style.active_line_background),
494 border: Border::default(),
495 corner_radius: 0.,
496 });
497 }
498 }
499
500 if let Some(highlighted_rows) = &layout.highlighted_rows {
501 let origin = vec2f(
502 bounds.origin_x(),
503 bounds.origin_y()
504 + (layout.position_map.line_height * highlighted_rows.start as f32)
505 - scroll_top,
506 );
507 let size = vec2f(
508 bounds.width(),
509 layout.position_map.line_height * highlighted_rows.len() as f32,
510 );
511 cx.scene.push_quad(Quad {
512 bounds: RectF::new(origin, size),
513 background: Some(self.style.highlighted_line_background),
514 border: Border::default(),
515 corner_radius: 0.,
516 });
517 }
518 }
519 }
520
521 fn paint_gutter(
522 &mut self,
523 bounds: RectF,
524 visible_bounds: RectF,
525 layout: &mut LayoutState,
526 cx: &mut PaintContext,
527 ) {
528 struct GutterLayout {
529 line_height: f32,
530 // scroll_position: Vector2F,
531 scroll_top: f32,
532 bounds: RectF,
533 }
534
535 struct DiffLayout<'a> {
536 buffer_row: u32,
537 last_diff: Option<&'a DiffHunk<u32>>,
538 }
539
540 fn diff_quad(
541 hunk: &DiffHunk<u32>,
542 gutter_layout: &GutterLayout,
543 diff_style: &DiffStyle,
544 ) -> Quad {
545 let color = match hunk.status() {
546 DiffHunkStatus::Added => diff_style.inserted,
547 DiffHunkStatus::Modified => diff_style.modified,
548
549 //TODO: This rendering is entirely a horrible hack
550 DiffHunkStatus::Removed => {
551 let row = hunk.buffer_range.start;
552
553 let offset = gutter_layout.line_height / 2.;
554 let start_y =
555 row as f32 * gutter_layout.line_height + offset - gutter_layout.scroll_top;
556 let end_y = start_y + gutter_layout.line_height;
557
558 let width = diff_style.removed_width_em * gutter_layout.line_height;
559 let highlight_origin = gutter_layout.bounds.origin() + vec2f(-width, start_y);
560 let highlight_size = vec2f(width * 2., end_y - start_y);
561 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
562
563 return Quad {
564 bounds: highlight_bounds,
565 background: Some(diff_style.deleted),
566 border: Border::new(0., Color::transparent_black()),
567 corner_radius: 1. * gutter_layout.line_height,
568 };
569 }
570 };
571
572 let start_row = hunk.buffer_range.start;
573 let end_row = hunk.buffer_range.end;
574
575 let start_y = start_row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
576 let end_y = end_row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
577
578 let width = diff_style.width_em * gutter_layout.line_height;
579 let highlight_origin = gutter_layout.bounds.origin() + vec2f(-width, start_y);
580 let highlight_size = vec2f(width * 2., end_y - start_y);
581 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
582
583 Quad {
584 bounds: highlight_bounds,
585 background: Some(color),
586 border: Border::new(0., Color::transparent_black()),
587 corner_radius: diff_style.corner_radius * gutter_layout.line_height,
588 }
589 }
590
591 let scroll_position = layout.position_map.snapshot.scroll_position();
592 let gutter_layout = {
593 let line_height = layout.position_map.line_height;
594 GutterLayout {
595 scroll_top: scroll_position.y() * line_height,
596 line_height,
597 bounds,
598 }
599 };
600
601 let mut diff_layout = DiffLayout {
602 buffer_row: scroll_position.y() as u32,
603 last_diff: None,
604 };
605
606 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
607 let show_gutter = matches!(
608 &cx.global::<Settings>()
609 .git_overrides
610 .git_gutter
611 .unwrap_or_default(),
612 GitGutter::TrackedFiles
613 );
614
615 // line is `None` when there's a line wrap
616 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
617 if let Some(line) = line {
618 let line_origin = bounds.origin()
619 + vec2f(
620 bounds.width() - line.width() - layout.gutter_padding,
621 ix as f32 * gutter_layout.line_height
622 - (gutter_layout.scroll_top % gutter_layout.line_height),
623 );
624
625 line.paint(line_origin, visible_bounds, gutter_layout.line_height, cx);
626
627 if show_gutter {
628 //This line starts a buffer line, so let's do the diff calculation
629 let new_hunk = get_hunk(diff_layout.buffer_row, &layout.diff_hunks);
630
631 let (is_ending, is_starting) = match (diff_layout.last_diff, new_hunk) {
632 (Some(old_hunk), Some(new_hunk)) if new_hunk == old_hunk => (false, false),
633 (a, b) => (a.is_some(), b.is_some()),
634 };
635
636 if is_ending {
637 let last_hunk = diff_layout.last_diff.take().unwrap();
638 cx.scene
639 .push_quad(diff_quad(last_hunk, &gutter_layout, diff_style));
640 }
641
642 if is_starting {
643 let new_hunk = new_hunk.unwrap();
644 diff_layout.last_diff = Some(new_hunk);
645 };
646
647 diff_layout.buffer_row += 1;
648 }
649 }
650 }
651
652 // If we ran out with a diff hunk still being prepped, paint it now
653 if let Some(last_hunk) = diff_layout.last_diff {
654 cx.scene
655 .push_quad(diff_quad(last_hunk, &gutter_layout, diff_style))
656 }
657
658 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
659 let mut x = bounds.width() - layout.gutter_padding;
660 let mut y = *row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
661 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
662 y += (gutter_layout.line_height - indicator.size().y()) / 2.;
663 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
664 }
665 }
666
667 fn paint_text(
668 &mut self,
669 bounds: RectF,
670 visible_bounds: RectF,
671 layout: &mut LayoutState,
672 cx: &mut PaintContext,
673 ) {
674 let view = self.view(cx.app);
675 let style = &self.style;
676 let local_replica_id = view.replica_id(cx);
677 let scroll_position = layout.position_map.snapshot.scroll_position();
678 let start_row = scroll_position.y() as u32;
679 let scroll_top = scroll_position.y() * layout.position_map.line_height;
680 let end_row =
681 ((scroll_top + bounds.height()) / layout.position_map.line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
682 let max_glyph_width = layout.position_map.em_width;
683 let scroll_left = scroll_position.x() * max_glyph_width;
684 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
685
686 cx.scene.push_layer(Some(bounds));
687
688 cx.scene.push_cursor_region(CursorRegion {
689 bounds,
690 style: if !view.link_go_to_definition_state.definitions.is_empty() {
691 CursorStyle::PointingHand
692 } else {
693 CursorStyle::IBeam
694 },
695 });
696
697 for (range, color) in &layout.highlighted_ranges {
698 self.paint_highlighted_range(
699 range.clone(),
700 start_row,
701 end_row,
702 *color,
703 0.,
704 0.15 * layout.position_map.line_height,
705 layout,
706 content_origin,
707 scroll_top,
708 scroll_left,
709 bounds,
710 cx,
711 );
712 }
713
714 let mut cursors = SmallVec::<[Cursor; 32]>::new();
715 for (replica_id, selections) in &layout.selections {
716 let selection_style = style.replica_selection_style(*replica_id);
717 let corner_radius = 0.15 * layout.position_map.line_height;
718
719 for selection in selections {
720 self.paint_highlighted_range(
721 selection.range.clone(),
722 start_row,
723 end_row,
724 selection_style.selection,
725 corner_radius,
726 corner_radius * 2.,
727 layout,
728 content_origin,
729 scroll_top,
730 scroll_left,
731 bounds,
732 cx,
733 );
734
735 if view.show_local_cursors() || *replica_id != local_replica_id {
736 let cursor_position = selection.head;
737 if (start_row..end_row).contains(&cursor_position.row()) {
738 let cursor_row_layout = &layout.position_map.line_layouts
739 [(cursor_position.row() - start_row) as usize];
740 let cursor_column = cursor_position.column() as usize;
741
742 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
743 let mut block_width =
744 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
745 if block_width == 0.0 {
746 block_width = layout.position_map.em_width;
747 }
748 let block_text = if let CursorShape::Block = self.cursor_shape {
749 layout
750 .position_map
751 .snapshot
752 .chars_at(cursor_position)
753 .next()
754 .and_then(|(character, _)| {
755 let font_id =
756 cursor_row_layout.font_for_index(cursor_column)?;
757 let text = character.to_string();
758
759 Some(cx.text_layout_cache.layout_str(
760 &text,
761 cursor_row_layout.font_size(),
762 &[(
763 text.len(),
764 RunStyle {
765 font_id,
766 color: style.background,
767 underline: Default::default(),
768 },
769 )],
770 ))
771 })
772 } else {
773 None
774 };
775
776 let x = cursor_character_x - scroll_left;
777 let y = cursor_position.row() as f32 * layout.position_map.line_height
778 - scroll_top;
779 cursors.push(Cursor {
780 color: selection_style.cursor,
781 block_width,
782 origin: vec2f(x, y),
783 line_height: layout.position_map.line_height,
784 shape: self.cursor_shape,
785 block_text,
786 });
787 }
788 }
789 }
790 }
791
792 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
793 // Draw glyphs
794 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
795 let row = start_row + ix as u32;
796 line.paint(
797 content_origin
798 + vec2f(
799 -scroll_left,
800 row as f32 * layout.position_map.line_height - scroll_top,
801 ),
802 visible_text_bounds,
803 layout.position_map.line_height,
804 cx,
805 );
806 }
807 }
808
809 cx.scene.push_layer(Some(bounds));
810 for cursor in cursors {
811 cursor.paint(content_origin, cx);
812 }
813 cx.scene.pop_layer();
814
815 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
816 cx.scene.push_stacking_context(None);
817 let cursor_row_layout =
818 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
819 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
820 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
821 let mut list_origin = content_origin + vec2f(x, y);
822 let list_width = context_menu.size().x();
823 let list_height = context_menu.size().y();
824
825 // Snap the right edge of the list to the right edge of the window if
826 // its horizontal bounds overflow.
827 if list_origin.x() + list_width > cx.window_size.x() {
828 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
829 }
830
831 if list_origin.y() + list_height > bounds.max_y() {
832 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
833 }
834
835 context_menu.paint(
836 list_origin,
837 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
838 cx,
839 );
840
841 cx.scene.pop_stacking_context();
842 }
843
844 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
845 cx.scene.push_stacking_context(None);
846
847 // This is safe because we check on layout whether the required row is available
848 let hovered_row_layout =
849 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
850
851 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
852 // height. This is the size we will use to decide whether to render popovers above or below
853 // the hovered line.
854 let first_size = hover_popovers[0].size();
855 let height_to_reserve = first_size.y()
856 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
857
858 // Compute Hovered Point
859 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
860 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
861 let hovered_point = content_origin + vec2f(x, y);
862
863 if hovered_point.y() - height_to_reserve > 0.0 {
864 // There is enough space above. Render popovers above the hovered point
865 let mut current_y = hovered_point.y();
866 for hover_popover in hover_popovers {
867 let size = hover_popover.size();
868 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
869
870 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
871 if x_out_of_bounds < 0.0 {
872 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
873 }
874
875 hover_popover.paint(
876 popover_origin,
877 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
878 cx,
879 );
880
881 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
882 }
883 } else {
884 // There is not enough space above. Render popovers below the hovered point
885 let mut current_y = hovered_point.y() + layout.position_map.line_height;
886 for hover_popover in hover_popovers {
887 let size = hover_popover.size();
888 let mut popover_origin = vec2f(hovered_point.x(), current_y);
889
890 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
891 if x_out_of_bounds < 0.0 {
892 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
893 }
894
895 hover_popover.paint(
896 popover_origin,
897 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
898 cx,
899 );
900
901 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
902 }
903 }
904
905 cx.scene.pop_stacking_context();
906 }
907
908 cx.scene.pop_layer();
909 }
910
911 fn paint_scrollbar(&mut self, bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
912 enum ScrollbarMouseHandlers {}
913 if layout.mode != EditorMode::Full {
914 return;
915 }
916
917 let view = self.view.clone();
918 let style = &self.style.theme.scrollbar;
919
920 let top = bounds.min_y();
921 let bottom = bounds.max_y();
922 let right = bounds.max_x();
923 let left = right - style.width;
924 let row_range = &layout.scrollbar_row_range;
925 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
926
927 let mut height = bounds.height();
928 let mut first_row_y_offset = 0.0;
929
930 // Impose a minimum height on the scrollbar thumb
931 let min_thumb_height =
932 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
933 let thumb_height = (row_range.end - row_range.start) * height / max_row;
934 if thumb_height < min_thumb_height {
935 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
936 height -= min_thumb_height - thumb_height;
937 }
938
939 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
940
941 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
942 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
943 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
944 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
945
946 if layout.show_scrollbars {
947 cx.scene.push_quad(Quad {
948 bounds: track_bounds,
949 border: style.track.border,
950 background: style.track.background_color,
951 ..Default::default()
952 });
953 cx.scene.push_quad(Quad {
954 bounds: thumb_bounds,
955 border: style.thumb.border,
956 background: style.thumb.background_color,
957 corner_radius: style.thumb.corner_radius,
958 });
959 }
960
961 cx.scene.push_cursor_region(CursorRegion {
962 bounds: track_bounds,
963 style: CursorStyle::Arrow,
964 });
965 cx.scene.push_mouse_region(
966 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
967 .on_move({
968 let view = view.clone();
969 move |_, cx| {
970 if let Some(view) = view.upgrade(cx.deref_mut()) {
971 view.update(cx.deref_mut(), |view, cx| {
972 view.make_scrollbar_visible(cx);
973 });
974 }
975 }
976 })
977 .on_down(MouseButton::Left, {
978 let view = view.clone();
979 let row_range = row_range.clone();
980 move |e, cx| {
981 let y = e.position.y();
982 if let Some(view) = view.upgrade(cx.deref_mut()) {
983 view.update(cx.deref_mut(), |view, cx| {
984 if y < thumb_top || thumb_bottom < y {
985 let center_row =
986 ((y - top) * max_row as f32 / height).round() as u32;
987 let top_row = center_row.saturating_sub(
988 (row_range.end - row_range.start) as u32 / 2,
989 );
990 let mut position = view.scroll_position(cx);
991 position.set_y(top_row as f32);
992 view.set_scroll_position(position, cx);
993 } else {
994 view.make_scrollbar_visible(cx);
995 }
996 });
997 }
998 }
999 })
1000 .on_drag(MouseButton::Left, {
1001 let view = view.clone();
1002 move |e, cx| {
1003 let y = e.prev_mouse_position.y();
1004 let new_y = e.position.y();
1005 if thumb_top < y && y < thumb_bottom {
1006 if let Some(view) = view.upgrade(cx.deref_mut()) {
1007 view.update(cx.deref_mut(), |view, cx| {
1008 let mut position = view.scroll_position(cx);
1009 position.set_y(
1010 position.y() + (new_y - y) * (max_row as f32) / height,
1011 );
1012 if position.y() < 0.0 {
1013 position.set_y(0.);
1014 }
1015 view.set_scroll_position(position, cx);
1016 });
1017 }
1018 }
1019 }
1020 }),
1021 );
1022 }
1023
1024 #[allow(clippy::too_many_arguments)]
1025 fn paint_highlighted_range(
1026 &self,
1027 range: Range<DisplayPoint>,
1028 start_row: u32,
1029 end_row: u32,
1030 color: Color,
1031 corner_radius: f32,
1032 line_end_overshoot: f32,
1033 layout: &LayoutState,
1034 content_origin: Vector2F,
1035 scroll_top: f32,
1036 scroll_left: f32,
1037 bounds: RectF,
1038 cx: &mut PaintContext,
1039 ) {
1040 if range.start != range.end {
1041 let row_range = if range.end.column() == 0 {
1042 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1043 } else {
1044 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1045 };
1046
1047 let highlighted_range = HighlightedRange {
1048 color,
1049 line_height: layout.position_map.line_height,
1050 corner_radius,
1051 start_y: content_origin.y()
1052 + row_range.start as f32 * layout.position_map.line_height
1053 - scroll_top,
1054 lines: row_range
1055 .into_iter()
1056 .map(|row| {
1057 let line_layout =
1058 &layout.position_map.line_layouts[(row - start_row) as usize];
1059 HighlightedRangeLine {
1060 start_x: if row == range.start.row() {
1061 content_origin.x()
1062 + line_layout.x_for_index(range.start.column() as usize)
1063 - scroll_left
1064 } else {
1065 content_origin.x() - scroll_left
1066 },
1067 end_x: if row == range.end.row() {
1068 content_origin.x()
1069 + line_layout.x_for_index(range.end.column() as usize)
1070 - scroll_left
1071 } else {
1072 content_origin.x() + line_layout.width() + line_end_overshoot
1073 - scroll_left
1074 },
1075 }
1076 })
1077 .collect(),
1078 };
1079
1080 highlighted_range.paint(bounds, cx.scene);
1081 }
1082 }
1083
1084 fn paint_blocks(
1085 &mut self,
1086 bounds: RectF,
1087 visible_bounds: RectF,
1088 layout: &mut LayoutState,
1089 cx: &mut PaintContext,
1090 ) {
1091 let scroll_position = layout.position_map.snapshot.scroll_position();
1092 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1093 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1094
1095 for block in &mut layout.blocks {
1096 let mut origin = bounds.origin()
1097 + vec2f(
1098 0.,
1099 block.row as f32 * layout.position_map.line_height - scroll_top,
1100 );
1101 if !matches!(block.style, BlockStyle::Sticky) {
1102 origin += vec2f(-scroll_left, 0.);
1103 }
1104 block.element.paint(origin, visible_bounds, cx);
1105 }
1106 }
1107
1108 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1109 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1110 let style = &self.style;
1111
1112 cx.text_layout_cache
1113 .layout_str(
1114 "1".repeat(digit_count).as_str(),
1115 style.text.font_size,
1116 &[(
1117 digit_count,
1118 RunStyle {
1119 font_id: style.text.font_id,
1120 color: Color::black(),
1121 underline: Default::default(),
1122 },
1123 )],
1124 )
1125 .width()
1126 }
1127
1128 fn layout_line_numbers(
1129 &self,
1130 rows: Range<u32>,
1131 active_rows: &BTreeMap<u32, bool>,
1132 snapshot: &EditorSnapshot,
1133 cx: &LayoutContext,
1134 ) -> Vec<Option<text_layout::Line>> {
1135 let style = &self.style;
1136 let include_line_numbers = snapshot.mode == EditorMode::Full;
1137 let mut line_number_layouts = Vec::with_capacity(rows.len());
1138 let mut line_number = String::new();
1139 for (ix, row) in snapshot
1140 .buffer_rows(rows.start)
1141 .take((rows.end - rows.start) as usize)
1142 .enumerate()
1143 {
1144 let display_row = rows.start + ix as u32;
1145 let color = if active_rows.contains_key(&display_row) {
1146 style.line_number_active
1147 } else {
1148 style.line_number
1149 };
1150 if let Some(buffer_row) = row {
1151 if include_line_numbers {
1152 line_number.clear();
1153 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1154 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1155 &line_number,
1156 style.text.font_size,
1157 &[(
1158 line_number.len(),
1159 RunStyle {
1160 font_id: style.text.font_id,
1161 color,
1162 underline: Default::default(),
1163 },
1164 )],
1165 )));
1166 }
1167 } else {
1168 line_number_layouts.push(None);
1169 }
1170 }
1171
1172 line_number_layouts
1173 }
1174
1175 fn layout_lines(
1176 &mut self,
1177 rows: Range<u32>,
1178 snapshot: &EditorSnapshot,
1179 cx: &LayoutContext,
1180 ) -> Vec<text_layout::Line> {
1181 if rows.start >= rows.end {
1182 return Vec::new();
1183 }
1184
1185 // When the editor is empty and unfocused, then show the placeholder.
1186 if snapshot.is_empty() && !snapshot.is_focused() {
1187 let placeholder_style = self
1188 .style
1189 .placeholder_text
1190 .as_ref()
1191 .unwrap_or(&self.style.text);
1192 let placeholder_text = snapshot.placeholder_text();
1193 let placeholder_lines = placeholder_text
1194 .as_ref()
1195 .map_or("", AsRef::as_ref)
1196 .split('\n')
1197 .skip(rows.start as usize)
1198 .chain(iter::repeat(""))
1199 .take(rows.len());
1200 placeholder_lines
1201 .map(|line| {
1202 cx.text_layout_cache.layout_str(
1203 line,
1204 placeholder_style.font_size,
1205 &[(
1206 line.len(),
1207 RunStyle {
1208 font_id: placeholder_style.font_id,
1209 color: placeholder_style.color,
1210 underline: Default::default(),
1211 },
1212 )],
1213 )
1214 })
1215 .collect()
1216 } else {
1217 let style = &self.style;
1218 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1219 let mut highlight_style = chunk
1220 .syntax_highlight_id
1221 .and_then(|id| id.style(&style.syntax));
1222
1223 if let Some(chunk_highlight) = chunk.highlight_style {
1224 if let Some(highlight_style) = highlight_style.as_mut() {
1225 highlight_style.highlight(chunk_highlight);
1226 } else {
1227 highlight_style = Some(chunk_highlight);
1228 }
1229 }
1230
1231 let mut diagnostic_highlight = HighlightStyle::default();
1232
1233 if chunk.is_unnecessary {
1234 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1235 }
1236
1237 if let Some(severity) = chunk.diagnostic_severity {
1238 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1239 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1240 let diagnostic_style = super::diagnostic_style(severity, true, style);
1241 diagnostic_highlight.underline = Some(Underline {
1242 color: Some(diagnostic_style.message.text.color),
1243 thickness: 1.0.into(),
1244 squiggly: true,
1245 });
1246 }
1247 }
1248
1249 if let Some(highlight_style) = highlight_style.as_mut() {
1250 highlight_style.highlight(diagnostic_highlight);
1251 } else {
1252 highlight_style = Some(diagnostic_highlight);
1253 }
1254
1255 (chunk.text, highlight_style)
1256 });
1257 layout_highlighted_chunks(
1258 chunks,
1259 &style.text,
1260 cx.text_layout_cache,
1261 cx.font_cache,
1262 MAX_LINE_LEN,
1263 rows.len() as usize,
1264 )
1265 }
1266 }
1267
1268 #[allow(clippy::too_many_arguments)]
1269 fn layout_blocks(
1270 &mut self,
1271 rows: Range<u32>,
1272 snapshot: &EditorSnapshot,
1273 editor_width: f32,
1274 scroll_width: f32,
1275 gutter_padding: f32,
1276 gutter_width: f32,
1277 em_width: f32,
1278 text_x: f32,
1279 line_height: f32,
1280 style: &EditorStyle,
1281 line_layouts: &[text_layout::Line],
1282 cx: &mut LayoutContext,
1283 ) -> (f32, Vec<BlockLayout>) {
1284 let editor = if let Some(editor) = self.view.upgrade(cx) {
1285 editor
1286 } else {
1287 return Default::default();
1288 };
1289
1290 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1291 let scroll_x = snapshot.scroll_position.x();
1292 let (fixed_blocks, non_fixed_blocks) = snapshot
1293 .blocks_in_range(rows.clone())
1294 .partition::<Vec<_>, _>(|(_, block)| match block {
1295 TransformBlock::ExcerptHeader { .. } => false,
1296 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1297 });
1298 let mut render_block = |block: &TransformBlock, width: f32| {
1299 let mut element = match block {
1300 TransformBlock::Custom(block) => {
1301 let align_to = block
1302 .position()
1303 .to_point(&snapshot.buffer_snapshot)
1304 .to_display_point(snapshot);
1305 let anchor_x = text_x
1306 + if rows.contains(&align_to.row()) {
1307 line_layouts[(align_to.row() - rows.start) as usize]
1308 .x_for_index(align_to.column() as usize)
1309 } else {
1310 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1311 .x_for_index(align_to.column() as usize)
1312 };
1313
1314 cx.render(&editor, |_, cx| {
1315 block.render(&mut BlockContext {
1316 cx,
1317 anchor_x,
1318 gutter_padding,
1319 line_height,
1320 scroll_x,
1321 gutter_width,
1322 em_width,
1323 })
1324 })
1325 }
1326 TransformBlock::ExcerptHeader {
1327 key,
1328 buffer,
1329 range,
1330 starts_new_buffer,
1331 ..
1332 } => {
1333 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1334 let jump_position = range
1335 .primary
1336 .as_ref()
1337 .map_or(range.context.start, |primary| primary.start);
1338 let jump_action = crate::Jump {
1339 path: ProjectPath {
1340 worktree_id: file.worktree_id(cx),
1341 path: file.path.clone(),
1342 },
1343 position: language::ToPoint::to_point(&jump_position, buffer),
1344 anchor: jump_position,
1345 };
1346
1347 enum JumpIcon {}
1348 cx.render(&editor, |_, cx| {
1349 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1350 let style = style.jump_icon.style_for(state, false);
1351 Svg::new("icons/arrow_up_right_8.svg")
1352 .with_color(style.color)
1353 .constrained()
1354 .with_width(style.icon_width)
1355 .aligned()
1356 .contained()
1357 .with_style(style.container)
1358 .constrained()
1359 .with_width(style.button_width)
1360 .with_height(style.button_width)
1361 .boxed()
1362 })
1363 .with_cursor_style(CursorStyle::PointingHand)
1364 .on_click(MouseButton::Left, move |_, cx| {
1365 cx.dispatch_action(jump_action.clone())
1366 })
1367 .with_tooltip::<JumpIcon, _>(
1368 *key,
1369 "Jump to Buffer".to_string(),
1370 Some(Box::new(crate::OpenExcerpts)),
1371 tooltip_style.clone(),
1372 cx,
1373 )
1374 .aligned()
1375 .flex_float()
1376 .boxed()
1377 })
1378 });
1379
1380 if *starts_new_buffer {
1381 let style = &self.style.diagnostic_path_header;
1382 let font_size =
1383 (style.text_scale_factor * self.style.text.font_size).round();
1384
1385 let mut filename = None;
1386 let mut parent_path = None;
1387 if let Some(file) = buffer.file() {
1388 let path = file.path();
1389 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1390 parent_path =
1391 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1392 }
1393
1394 Flex::row()
1395 .with_child(
1396 Label::new(
1397 filename.unwrap_or_else(|| "untitled".to_string()),
1398 style.filename.text.clone().with_font_size(font_size),
1399 )
1400 .contained()
1401 .with_style(style.filename.container)
1402 .aligned()
1403 .boxed(),
1404 )
1405 .with_children(parent_path.map(|path| {
1406 Label::new(path, style.path.text.clone().with_font_size(font_size))
1407 .contained()
1408 .with_style(style.path.container)
1409 .aligned()
1410 .boxed()
1411 }))
1412 .with_children(jump_icon)
1413 .contained()
1414 .with_style(style.container)
1415 .with_padding_left(gutter_padding)
1416 .with_padding_right(gutter_padding)
1417 .expanded()
1418 .named("path header block")
1419 } else {
1420 let text_style = self.style.text.clone();
1421 Flex::row()
1422 .with_child(Label::new("…".to_string(), text_style).boxed())
1423 .with_children(jump_icon)
1424 .contained()
1425 .with_padding_left(gutter_padding)
1426 .with_padding_right(gutter_padding)
1427 .expanded()
1428 .named("collapsed context")
1429 }
1430 }
1431 };
1432
1433 element.layout(
1434 SizeConstraint {
1435 min: Vector2F::zero(),
1436 max: vec2f(width, block.height() as f32 * line_height),
1437 },
1438 cx,
1439 );
1440 element
1441 };
1442
1443 let mut fixed_block_max_width = 0f32;
1444 let mut blocks = Vec::new();
1445 for (row, block) in fixed_blocks {
1446 let element = render_block(block, f32::INFINITY);
1447 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1448 blocks.push(BlockLayout {
1449 row,
1450 element,
1451 style: BlockStyle::Fixed,
1452 });
1453 }
1454 for (row, block) in non_fixed_blocks {
1455 let style = match block {
1456 TransformBlock::Custom(block) => block.style(),
1457 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1458 };
1459 let width = match style {
1460 BlockStyle::Sticky => editor_width,
1461 BlockStyle::Flex => editor_width
1462 .max(fixed_block_max_width)
1463 .max(gutter_width + scroll_width),
1464 BlockStyle::Fixed => unreachable!(),
1465 };
1466 let element = render_block(block, width);
1467 blocks.push(BlockLayout {
1468 row,
1469 element,
1470 style,
1471 });
1472 }
1473 (
1474 scroll_width.max(fixed_block_max_width - gutter_width),
1475 blocks,
1476 )
1477 }
1478}
1479
1480/// Get the hunk that contains buffer_line, starting from start_idx
1481/// Returns none if there is none found, and
1482fn get_hunk(buffer_line: u32, hunks: &[DiffHunk<u32>]) -> Option<&DiffHunk<u32>> {
1483 for i in 0..hunks.len() {
1484 // Safety: Index out of bounds is handled by the check above
1485 let hunk = hunks.get(i).unwrap();
1486 if hunk.buffer_range.contains(&(buffer_line as u32)) {
1487 return Some(hunk);
1488 } else if hunk.status() == DiffHunkStatus::Removed && buffer_line == hunk.buffer_range.start
1489 {
1490 return Some(hunk);
1491 } else if hunk.buffer_range.start > buffer_line as u32 {
1492 // If we've passed the buffer_line, just stop
1493 return None;
1494 }
1495 }
1496
1497 // We reached the end of the array without finding a hunk, just return none.
1498 return None;
1499}
1500
1501impl Element for EditorElement {
1502 type LayoutState = LayoutState;
1503 type PaintState = ();
1504
1505 fn layout(
1506 &mut self,
1507 constraint: SizeConstraint,
1508 cx: &mut LayoutContext,
1509 ) -> (Vector2F, Self::LayoutState) {
1510 let mut size = constraint.max;
1511 if size.x().is_infinite() {
1512 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1513 }
1514
1515 let snapshot = self.snapshot(cx.app);
1516 let style = self.style.clone();
1517 let line_height = style.text.line_height(cx.font_cache);
1518
1519 let gutter_padding;
1520 let gutter_width;
1521 let gutter_margin;
1522 if snapshot.mode == EditorMode::Full {
1523 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1524 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1525 gutter_margin = -style.text.descent(cx.font_cache);
1526 } else {
1527 gutter_padding = 0.0;
1528 gutter_width = 0.0;
1529 gutter_margin = 0.0;
1530 };
1531
1532 let text_width = size.x() - gutter_width;
1533 let em_width = style.text.em_width(cx.font_cache);
1534 let em_advance = style.text.em_advance(cx.font_cache);
1535 let overscroll = vec2f(em_width, 0.);
1536 let snapshot = self.update_view(cx.app, |view, cx| {
1537 view.set_visible_line_count(size.y() / line_height);
1538
1539 let wrap_width = match view.soft_wrap_mode(cx) {
1540 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1541 SoftWrap::EditorWidth => {
1542 Some(text_width - gutter_margin - overscroll.x() - em_width)
1543 }
1544 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1545 };
1546
1547 if view.set_wrap_width(wrap_width, cx) {
1548 view.snapshot(cx)
1549 } else {
1550 snapshot
1551 }
1552 });
1553
1554 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1555 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1556 size.set_y(
1557 scroll_height
1558 .min(constraint.max_along(Axis::Vertical))
1559 .max(constraint.min_along(Axis::Vertical))
1560 .min(line_height * max_lines as f32),
1561 )
1562 } else if let EditorMode::SingleLine = snapshot.mode {
1563 size.set_y(
1564 line_height
1565 .min(constraint.max_along(Axis::Vertical))
1566 .max(constraint.min_along(Axis::Vertical)),
1567 )
1568 } else if size.y().is_infinite() {
1569 size.set_y(scroll_height);
1570 }
1571 let gutter_size = vec2f(gutter_width, size.y());
1572 let text_size = vec2f(text_width, size.y());
1573
1574 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1575 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1576 let snapshot = view.snapshot(cx);
1577 (autoscroll_horizontally, snapshot)
1578 });
1579
1580 let scroll_position = snapshot.scroll_position();
1581 // The scroll position is a fractional point, the whole number of which represents
1582 // the top of the window in terms of display rows.
1583 let start_row = scroll_position.y() as u32;
1584 let height_in_lines = size.y() / line_height;
1585 let max_row = snapshot.max_point().row();
1586
1587 // Add 1 to ensure selections bleed off screen
1588 let end_row = 1 + cmp::min(
1589 (scroll_position.y() + height_in_lines).ceil() as u32,
1590 max_row,
1591 );
1592
1593 let start_anchor = if start_row == 0 {
1594 Anchor::min()
1595 } else {
1596 snapshot
1597 .buffer_snapshot
1598 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1599 };
1600 let end_anchor = if end_row > max_row {
1601 Anchor::max()
1602 } else {
1603 snapshot
1604 .buffer_snapshot
1605 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1606 };
1607
1608 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1609 let mut active_rows = BTreeMap::new();
1610 let mut highlighted_rows = None;
1611 let mut highlighted_ranges = Vec::new();
1612 let mut show_scrollbars = false;
1613 self.update_view(cx.app, |view, cx| {
1614 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1615
1616 highlighted_rows = view.highlighted_rows();
1617 let theme = cx.global::<Settings>().theme.as_ref();
1618 highlighted_ranges = view.background_highlights_in_range(
1619 start_anchor.clone()..end_anchor.clone(),
1620 &display_map,
1621 theme,
1622 );
1623
1624 let mut remote_selections = HashMap::default();
1625 for (replica_id, line_mode, selection) in display_map
1626 .buffer_snapshot
1627 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1628 {
1629 // The local selections match the leader's selections.
1630 if Some(replica_id) == view.leader_replica_id {
1631 continue;
1632 }
1633 remote_selections
1634 .entry(replica_id)
1635 .or_insert(Vec::new())
1636 .push(SelectionLayout::new(selection, line_mode, &display_map));
1637 }
1638 selections.extend(remote_selections);
1639
1640 if view.show_local_selections {
1641 let mut local_selections = view
1642 .selections
1643 .disjoint_in_range(start_anchor..end_anchor, cx);
1644 local_selections.extend(view.selections.pending(cx));
1645 for selection in &local_selections {
1646 let is_empty = selection.start == selection.end;
1647 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1648 let selection_end = snapshot.next_line_boundary(selection.end).1;
1649 for row in cmp::max(selection_start.row(), start_row)
1650 ..=cmp::min(selection_end.row(), end_row)
1651 {
1652 let contains_non_empty_selection =
1653 active_rows.entry(row).or_insert(!is_empty);
1654 *contains_non_empty_selection |= !is_empty;
1655 }
1656 }
1657
1658 // Render the local selections in the leader's color when following.
1659 let local_replica_id = view
1660 .leader_replica_id
1661 .unwrap_or_else(|| view.replica_id(cx));
1662
1663 selections.push((
1664 local_replica_id,
1665 local_selections
1666 .into_iter()
1667 .map(|selection| {
1668 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1669 })
1670 .collect(),
1671 ));
1672 }
1673
1674 show_scrollbars = view.show_scrollbars();
1675 });
1676
1677 let line_number_layouts =
1678 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1679
1680 let diff_hunks = snapshot
1681 .buffer_snapshot
1682 .git_diff_hunks_in_range(start_row..end_row)
1683 .collect();
1684
1685 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1686
1687 let mut max_visible_line_width = 0.0;
1688 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1689 for line in &line_layouts {
1690 if line.width() > max_visible_line_width {
1691 max_visible_line_width = line.width();
1692 }
1693 }
1694
1695 let style = self.style.clone();
1696 let longest_line_width = layout_line(
1697 snapshot.longest_row(),
1698 &snapshot,
1699 &style,
1700 cx.text_layout_cache,
1701 )
1702 .width();
1703 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1704 let em_width = style.text.em_width(cx.font_cache);
1705 let (scroll_width, blocks) = self.layout_blocks(
1706 start_row..end_row,
1707 &snapshot,
1708 size.x(),
1709 scroll_width,
1710 gutter_padding,
1711 gutter_width,
1712 em_width,
1713 gutter_width + gutter_margin,
1714 line_height,
1715 &style,
1716 &line_layouts,
1717 cx,
1718 );
1719
1720 let scroll_max = vec2f(
1721 ((scroll_width - text_size.x()) / em_width).max(0.0),
1722 max_row as f32,
1723 );
1724
1725 self.update_view(cx.app, |view, cx| {
1726 let clamped = view.clamp_scroll_left(scroll_max.x());
1727
1728 let autoscrolled = if autoscroll_horizontally {
1729 view.autoscroll_horizontally(
1730 start_row,
1731 text_size.x(),
1732 scroll_width,
1733 em_width,
1734 &line_layouts,
1735 cx,
1736 )
1737 } else {
1738 false
1739 };
1740
1741 if clamped || autoscrolled {
1742 snapshot = view.snapshot(cx);
1743 }
1744 });
1745
1746 let mut context_menu = None;
1747 let mut code_actions_indicator = None;
1748 let mut hover = None;
1749 let mut mode = EditorMode::Full;
1750 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1751 let newest_selection_head = view
1752 .selections
1753 .newest::<usize>(cx)
1754 .head()
1755 .to_display_point(&snapshot);
1756
1757 let style = view.style(cx);
1758 if (start_row..end_row).contains(&newest_selection_head.row()) {
1759 if view.context_menu_visible() {
1760 context_menu =
1761 view.render_context_menu(newest_selection_head, style.clone(), cx);
1762 }
1763
1764 code_actions_indicator = view
1765 .render_code_actions_indicator(&style, cx)
1766 .map(|indicator| (newest_selection_head.row(), indicator));
1767 }
1768
1769 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1770 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1771 mode = view.mode;
1772 });
1773
1774 if let Some((_, context_menu)) = context_menu.as_mut() {
1775 context_menu.layout(
1776 SizeConstraint {
1777 min: Vector2F::zero(),
1778 max: vec2f(
1779 cx.window_size.x() * 0.7,
1780 (12. * line_height).min((size.y() - line_height) / 2.),
1781 ),
1782 },
1783 cx,
1784 );
1785 }
1786
1787 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1788 indicator.layout(
1789 SizeConstraint::strict_along(
1790 Axis::Vertical,
1791 line_height * style.code_actions.vertical_scale,
1792 ),
1793 cx,
1794 );
1795 }
1796
1797 if let Some((_, hover_popovers)) = hover.as_mut() {
1798 for hover_popover in hover_popovers.iter_mut() {
1799 hover_popover.layout(
1800 SizeConstraint {
1801 min: Vector2F::zero(),
1802 max: vec2f(
1803 (120. * em_width) // Default size
1804 .min(size.x() / 2.) // Shrink to half of the editor width
1805 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1806 (16. * line_height) // Default size
1807 .min(size.y() / 2.) // Shrink to half of the editor height
1808 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1809 ),
1810 },
1811 cx,
1812 );
1813 }
1814 }
1815
1816 (
1817 size,
1818 LayoutState {
1819 mode,
1820 position_map: Arc::new(PositionMap {
1821 size,
1822 scroll_max,
1823 line_layouts,
1824 line_height,
1825 em_width,
1826 em_advance,
1827 snapshot,
1828 }),
1829 gutter_size,
1830 gutter_padding,
1831 text_size,
1832 scrollbar_row_range,
1833 show_scrollbars,
1834 max_row,
1835 gutter_margin,
1836 active_rows,
1837 highlighted_rows,
1838 highlighted_ranges,
1839 line_number_layouts,
1840 diff_hunks,
1841 blocks,
1842 selections,
1843 context_menu,
1844 code_actions_indicator,
1845 hover_popovers: hover,
1846 },
1847 )
1848 }
1849
1850 fn paint(
1851 &mut self,
1852 bounds: RectF,
1853 visible_bounds: RectF,
1854 layout: &mut Self::LayoutState,
1855 cx: &mut PaintContext,
1856 ) -> Self::PaintState {
1857 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
1858 cx.scene.push_layer(Some(visible_bounds));
1859
1860 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1861 let text_bounds = RectF::new(
1862 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1863 layout.text_size,
1864 );
1865
1866 Self::attach_mouse_handlers(
1867 &self.view,
1868 &layout.position_map,
1869 visible_bounds,
1870 text_bounds,
1871 gutter_bounds,
1872 bounds,
1873 cx,
1874 );
1875
1876 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1877 if layout.gutter_size.x() > 0. {
1878 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1879 }
1880 self.paint_text(text_bounds, visible_bounds, layout, cx);
1881
1882 cx.scene.push_layer(Some(bounds));
1883 if !layout.blocks.is_empty() {
1884 self.paint_blocks(bounds, visible_bounds, layout, cx);
1885 }
1886 self.paint_scrollbar(bounds, layout, cx);
1887 cx.scene.pop_layer();
1888
1889 cx.scene.pop_layer();
1890 }
1891
1892 fn dispatch_event(
1893 &mut self,
1894 event: &Event,
1895 _: RectF,
1896 _: RectF,
1897 _: &mut LayoutState,
1898 _: &mut (),
1899 cx: &mut EventContext,
1900 ) -> bool {
1901 if let Event::ModifiersChanged(event) = event {
1902 self.modifiers_changed(*event, cx);
1903 }
1904
1905 false
1906 }
1907
1908 fn rect_for_text_range(
1909 &self,
1910 range_utf16: Range<usize>,
1911 bounds: RectF,
1912 _: RectF,
1913 layout: &Self::LayoutState,
1914 _: &Self::PaintState,
1915 _: &gpui::MeasurementContext,
1916 ) -> Option<RectF> {
1917 let text_bounds = RectF::new(
1918 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1919 layout.text_size,
1920 );
1921 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1922 let scroll_position = layout.position_map.snapshot.scroll_position();
1923 let start_row = scroll_position.y() as u32;
1924 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1925 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1926
1927 let range_start = OffsetUtf16(range_utf16.start)
1928 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1929 if range_start.row() < start_row {
1930 return None;
1931 }
1932
1933 let line = layout
1934 .position_map
1935 .line_layouts
1936 .get((range_start.row() - start_row) as usize)?;
1937 let range_start_x = line.x_for_index(range_start.column() as usize);
1938 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1939 Some(RectF::new(
1940 content_origin
1941 + vec2f(
1942 range_start_x,
1943 range_start_y + layout.position_map.line_height,
1944 )
1945 - vec2f(scroll_left, scroll_top),
1946 vec2f(
1947 layout.position_map.em_width,
1948 layout.position_map.line_height,
1949 ),
1950 ))
1951 }
1952
1953 fn debug(
1954 &self,
1955 bounds: RectF,
1956 _: &Self::LayoutState,
1957 _: &Self::PaintState,
1958 _: &gpui::DebugContext,
1959 ) -> json::Value {
1960 json!({
1961 "type": "BufferElement",
1962 "bounds": bounds.to_json()
1963 })
1964 }
1965}
1966
1967pub struct LayoutState {
1968 position_map: Arc<PositionMap>,
1969 gutter_size: Vector2F,
1970 gutter_padding: f32,
1971 gutter_margin: f32,
1972 text_size: Vector2F,
1973 mode: EditorMode,
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}