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, Selection};
39use project::ProjectPath;
40use rope::offset_utf16::OffsetUtf16;
41use settings::{GitGutter, Settings};
42use smallvec::SmallVec;
43use std::{
44 cmp::{self, Ordering},
45 fmt::Write,
46 iter,
47 ops::{DerefMut, Range},
48 sync::Arc,
49};
50use theme::DiffStyle;
51
52struct SelectionLayout {
53 head: DisplayPoint,
54 range: Range<DisplayPoint>,
55}
56
57impl SelectionLayout {
58 fn new<T: ToPoint + ToDisplayPoint + Clone>(
59 selection: Selection<T>,
60 line_mode: bool,
61 map: &DisplaySnapshot,
62 ) -> Self {
63 if line_mode {
64 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
65 let point_range = map.expand_to_line(selection.range());
66 Self {
67 head: selection.head().to_display_point(map),
68 range: point_range.start.to_display_point(map)
69 ..point_range.end.to_display_point(map),
70 }
71 } else {
72 let selection = selection.map(|p| p.to_display_point(map));
73 Self {
74 head: selection.head(),
75 range: selection.range(),
76 }
77 }
78 }
79}
80
81#[derive(Clone)]
82pub struct EditorElement {
83 view: WeakViewHandle<Editor>,
84 style: Arc<EditorStyle>,
85 cursor_shape: CursorShape,
86}
87
88impl EditorElement {
89 pub fn new(
90 view: WeakViewHandle<Editor>,
91 style: EditorStyle,
92 cursor_shape: CursorShape,
93 ) -> Self {
94 Self {
95 view,
96 style: Arc::new(style),
97 cursor_shape,
98 }
99 }
100
101 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
102 self.view.upgrade(cx).unwrap().read(cx)
103 }
104
105 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
106 where
107 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
108 {
109 self.view.upgrade(cx).unwrap().update(cx, f)
110 }
111
112 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
113 self.update_view(cx, |view, cx| view.snapshot(cx))
114 }
115
116 fn attach_mouse_handlers(
117 view: &WeakViewHandle<Editor>,
118 position_map: &Arc<PositionMap>,
119 visible_bounds: RectF,
120 text_bounds: RectF,
121 gutter_bounds: RectF,
122 bounds: RectF,
123 cx: &mut PaintContext,
124 ) {
125 enum EditorElementMouseHandlers {}
126 cx.scene.push_mouse_region(
127 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
128 .on_down(MouseButton::Left, {
129 let position_map = position_map.clone();
130 move |e, cx| {
131 if !Self::mouse_down(
132 e.platform_event,
133 position_map.as_ref(),
134 text_bounds,
135 gutter_bounds,
136 cx,
137 ) {
138 cx.propogate_event();
139 }
140 }
141 })
142 .on_down(MouseButton::Right, {
143 let position_map = position_map.clone();
144 move |e, cx| {
145 if !Self::mouse_right_down(
146 e.position,
147 position_map.as_ref(),
148 text_bounds,
149 cx,
150 ) {
151 cx.propogate_event();
152 }
153 }
154 })
155 .on_up(MouseButton::Left, {
156 let view = view.clone();
157 let position_map = position_map.clone();
158 move |e, cx| {
159 if !Self::mouse_up(
160 view.clone(),
161 e.position,
162 e.cmd,
163 e.shift,
164 position_map.as_ref(),
165 text_bounds,
166 cx,
167 ) {
168 cx.propogate_event()
169 }
170 }
171 })
172 .on_drag(MouseButton::Left, {
173 let view = view.clone();
174 let position_map = position_map.clone();
175 move |e, cx| {
176 if !Self::mouse_dragged(
177 view.clone(),
178 e.platform_event,
179 position_map.as_ref(),
180 text_bounds,
181 cx,
182 ) {
183 cx.propogate_event()
184 }
185 }
186 })
187 .on_move({
188 let position_map = position_map.clone();
189 move |e, cx| {
190 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
191 cx.propogate_event()
192 }
193 }
194 })
195 .on_scroll({
196 let position_map = position_map.clone();
197 move |e, cx| {
198 if !Self::scroll(e.position, e.delta, e.precise, &position_map, bounds, cx)
199 {
200 cx.propogate_event()
201 }
202 }
203 }),
204 );
205 }
206
207 fn mouse_down(
208 MouseButtonEvent {
209 position,
210 ctrl,
211 alt,
212 shift,
213 cmd,
214 mut click_count,
215 ..
216 }: MouseButtonEvent,
217 position_map: &PositionMap,
218 text_bounds: RectF,
219 gutter_bounds: RectF,
220 cx: &mut EventContext,
221 ) -> bool {
222 if gutter_bounds.contains_point(position) {
223 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
224 } else if !text_bounds.contains_point(position) {
225 return false;
226 }
227
228 let (position, target_position) = position_map.point_for_position(text_bounds, position);
229
230 if shift && alt {
231 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
232 position,
233 goal_column: target_position.column(),
234 }));
235 } else if shift && !ctrl && !alt && !cmd {
236 cx.dispatch_action(Select(SelectPhase::Extend {
237 position,
238 click_count,
239 }));
240 } else {
241 cx.dispatch_action(Select(SelectPhase::Begin {
242 position,
243 add: alt,
244 click_count,
245 }));
246 }
247
248 true
249 }
250
251 fn mouse_right_down(
252 position: Vector2F,
253 position_map: &PositionMap,
254 text_bounds: RectF,
255 cx: &mut EventContext,
256 ) -> bool {
257 if !text_bounds.contains_point(position) {
258 return false;
259 }
260
261 let (point, _) = position_map.point_for_position(text_bounds, position);
262
263 cx.dispatch_action(DeployMouseContextMenu { position, point });
264 true
265 }
266
267 fn mouse_up(
268 view: WeakViewHandle<Editor>,
269 position: Vector2F,
270 cmd: bool,
271 shift: bool,
272 position_map: &PositionMap,
273 text_bounds: RectF,
274 cx: &mut EventContext,
275 ) -> bool {
276 let view = view.upgrade(cx.app).unwrap().read(cx.app);
277 let end_selection = view.has_pending_selection();
278 let pending_nonempty_selections = view.has_pending_nonempty_selection();
279
280 if end_selection {
281 cx.dispatch_action(Select(SelectPhase::End));
282 }
283
284 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
285 let (point, target_point) = position_map.point_for_position(text_bounds, position);
286
287 if point == target_point {
288 if shift {
289 cx.dispatch_action(GoToFetchedTypeDefinition { point });
290 } else {
291 cx.dispatch_action(GoToFetchedDefinition { point });
292 }
293
294 return true;
295 }
296 }
297
298 end_selection
299 }
300
301 fn mouse_dragged(
302 view: WeakViewHandle<Editor>,
303 MouseMovedEvent {
304 cmd,
305 shift,
306 position,
307 ..
308 }: MouseMovedEvent,
309 position_map: &PositionMap,
310 text_bounds: RectF,
311 cx: &mut EventContext,
312 ) -> bool {
313 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
314 // Don't trigger hover popover if mouse is hovering over context menu
315 let point = if text_bounds.contains_point(position) {
316 let (point, target_point) = position_map.point_for_position(text_bounds, position);
317 if point == target_point {
318 Some(point)
319 } else {
320 None
321 }
322 } else {
323 None
324 };
325
326 cx.dispatch_action(UpdateGoToDefinitionLink {
327 point,
328 cmd_held: cmd,
329 shift_held: shift,
330 });
331
332 let view = view.upgrade(cx.app).unwrap().read(cx.app);
333 if view.has_pending_selection() {
334 let mut scroll_delta = Vector2F::zero();
335
336 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
337 let top = text_bounds.origin_y() + vertical_margin;
338 let bottom = text_bounds.lower_left().y() - vertical_margin;
339 if position.y() < top {
340 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
341 }
342 if position.y() > bottom {
343 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
344 }
345
346 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
347 let left = text_bounds.origin_x() + horizontal_margin;
348 let right = text_bounds.upper_right().x() - horizontal_margin;
349 if position.x() < left {
350 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
351 left - position.x(),
352 ))
353 }
354 if position.x() > right {
355 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
356 position.x() - right,
357 ))
358 }
359
360 let (position, target_position) =
361 position_map.point_for_position(text_bounds, position);
362
363 cx.dispatch_action(Select(SelectPhase::Update {
364 position,
365 goal_column: target_position.column(),
366 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
367 .clamp(Vector2F::zero(), position_map.scroll_max),
368 }));
369
370 cx.dispatch_action(HoverAt { point });
371 true
372 } else {
373 cx.dispatch_action(HoverAt { point });
374 false
375 }
376 }
377
378 fn mouse_moved(
379 MouseMovedEvent {
380 cmd,
381 shift,
382 position,
383 ..
384 }: MouseMovedEvent,
385 position_map: &PositionMap,
386 text_bounds: RectF,
387 cx: &mut EventContext,
388 ) -> bool {
389 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
390 // Don't trigger hover popover if mouse is hovering over context menu
391 let point = if text_bounds.contains_point(position) {
392 let (point, target_point) = position_map.point_for_position(text_bounds, position);
393 if point == target_point {
394 Some(point)
395 } else {
396 None
397 }
398 } else {
399 None
400 };
401
402 cx.dispatch_action(UpdateGoToDefinitionLink {
403 point,
404 cmd_held: cmd,
405 shift_held: shift,
406 });
407
408 cx.dispatch_action(HoverAt { point });
409 true
410 }
411
412 fn modifiers_changed(&self, event: ModifiersChangedEvent, cx: &mut EventContext) -> bool {
413 cx.dispatch_action(CmdShiftChanged {
414 cmd_down: event.cmd,
415 shift_down: event.shift,
416 });
417 false
418 }
419
420 fn scroll(
421 position: Vector2F,
422 mut delta: Vector2F,
423 precise: bool,
424 position_map: &PositionMap,
425 bounds: RectF,
426 cx: &mut EventContext,
427 ) -> bool {
428 if !bounds.contains_point(position) {
429 return false;
430 }
431
432 let max_glyph_width = position_map.em_width;
433 if !precise {
434 delta *= vec2f(max_glyph_width, position_map.line_height);
435 }
436
437 let scroll_position = position_map.snapshot.scroll_position();
438 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
439 let y =
440 (scroll_position.y() * position_map.line_height - delta.y()) / position_map.line_height;
441 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
442
443 cx.dispatch_action(Scroll(scroll_position));
444
445 true
446 }
447
448 fn paint_background(
449 &self,
450 gutter_bounds: RectF,
451 text_bounds: RectF,
452 layout: &LayoutState,
453 cx: &mut PaintContext,
454 ) {
455 let bounds = gutter_bounds.union_rect(text_bounds);
456 let scroll_top =
457 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
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 = layout.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 if layout.mode != EditorMode::Full {
915 return;
916 }
917
918 let view = self.view.clone();
919 let style = &self.style.theme.scrollbar;
920
921 let top = bounds.min_y();
922 let bottom = bounds.max_y();
923 let right = bounds.max_x();
924 let left = right - style.width;
925 let row_range = &layout.scrollbar_row_range;
926 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
927
928 let mut height = bounds.height();
929 let mut first_row_y_offset = 0.0;
930
931 // Impose a minimum height on the scrollbar thumb
932 let min_thumb_height =
933 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
934 let thumb_height = (row_range.end - row_range.start) * height / max_row;
935 if thumb_height < min_thumb_height {
936 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
937 height -= min_thumb_height - thumb_height;
938 }
939
940 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
941
942 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
943 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
944 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
945 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
946
947 if layout.show_scrollbars {
948 cx.scene.push_quad(Quad {
949 bounds: track_bounds,
950 border: style.track.border,
951 background: style.track.background_color,
952 ..Default::default()
953 });
954 cx.scene.push_quad(Quad {
955 bounds: thumb_bounds,
956 border: style.thumb.border,
957 background: style.thumb.background_color,
958 corner_radius: style.thumb.corner_radius,
959 });
960 }
961
962 cx.scene.push_cursor_region(CursorRegion {
963 bounds: track_bounds,
964 style: CursorStyle::Arrow,
965 });
966 cx.scene.push_mouse_region(
967 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
968 .on_move({
969 let view = view.clone();
970 move |_, cx| {
971 if let Some(view) = view.upgrade(cx.deref_mut()) {
972 view.update(cx.deref_mut(), |view, cx| {
973 view.make_scrollbar_visible(cx);
974 });
975 }
976 }
977 })
978 .on_down(MouseButton::Left, {
979 let view = view.clone();
980 let row_range = row_range.clone();
981 move |e, cx| {
982 let y = e.position.y();
983 if let Some(view) = view.upgrade(cx.deref_mut()) {
984 view.update(cx.deref_mut(), |view, cx| {
985 if y < thumb_top || thumb_bottom < y {
986 let center_row =
987 ((y - top) * max_row as f32 / height).round() as u32;
988 let top_row = center_row.saturating_sub(
989 (row_range.end - row_range.start) as u32 / 2,
990 );
991 let mut position = view.scroll_position(cx);
992 position.set_y(top_row as f32);
993 view.set_scroll_position(position, cx);
994 } else {
995 view.make_scrollbar_visible(cx);
996 }
997 });
998 }
999 }
1000 })
1001 .on_drag(MouseButton::Left, {
1002 let view = view.clone();
1003 move |e, cx| {
1004 let y = e.prev_mouse_position.y();
1005 let new_y = e.position.y();
1006 if thumb_top < y && y < thumb_bottom {
1007 if let Some(view) = view.upgrade(cx.deref_mut()) {
1008 view.update(cx.deref_mut(), |view, cx| {
1009 let mut position = view.scroll_position(cx);
1010 position.set_y(
1011 position.y() + (new_y - y) * (max_row as f32) / height,
1012 );
1013 if position.y() < 0.0 {
1014 position.set_y(0.);
1015 }
1016 view.set_scroll_position(position, cx);
1017 });
1018 }
1019 }
1020 }
1021 }),
1022 );
1023 }
1024
1025 #[allow(clippy::too_many_arguments)]
1026 fn paint_highlighted_range(
1027 &self,
1028 range: Range<DisplayPoint>,
1029 start_row: u32,
1030 end_row: u32,
1031 color: Color,
1032 corner_radius: f32,
1033 line_end_overshoot: f32,
1034 layout: &LayoutState,
1035 content_origin: Vector2F,
1036 scroll_top: f32,
1037 scroll_left: f32,
1038 bounds: RectF,
1039 cx: &mut PaintContext,
1040 ) {
1041 if range.start != range.end {
1042 let row_range = if range.end.column() == 0 {
1043 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1044 } else {
1045 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1046 };
1047
1048 let highlighted_range = HighlightedRange {
1049 color,
1050 line_height: layout.position_map.line_height,
1051 corner_radius,
1052 start_y: content_origin.y()
1053 + row_range.start as f32 * layout.position_map.line_height
1054 - scroll_top,
1055 lines: row_range
1056 .into_iter()
1057 .map(|row| {
1058 let line_layout =
1059 &layout.position_map.line_layouts[(row - start_row) as usize];
1060 HighlightedRangeLine {
1061 start_x: if row == range.start.row() {
1062 content_origin.x()
1063 + line_layout.x_for_index(range.start.column() as usize)
1064 - scroll_left
1065 } else {
1066 content_origin.x() - scroll_left
1067 },
1068 end_x: if row == range.end.row() {
1069 content_origin.x()
1070 + line_layout.x_for_index(range.end.column() as usize)
1071 - scroll_left
1072 } else {
1073 content_origin.x() + line_layout.width() + line_end_overshoot
1074 - scroll_left
1075 },
1076 }
1077 })
1078 .collect(),
1079 };
1080
1081 highlighted_range.paint(bounds, cx.scene);
1082 }
1083 }
1084
1085 fn paint_blocks(
1086 &mut self,
1087 bounds: RectF,
1088 visible_bounds: RectF,
1089 layout: &mut LayoutState,
1090 cx: &mut PaintContext,
1091 ) {
1092 let scroll_position = layout.position_map.snapshot.scroll_position();
1093 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1094 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1095
1096 for block in &mut layout.blocks {
1097 let mut origin = bounds.origin()
1098 + vec2f(
1099 0.,
1100 block.row as f32 * layout.position_map.line_height - scroll_top,
1101 );
1102 if !matches!(block.style, BlockStyle::Sticky) {
1103 origin += vec2f(-scroll_left, 0.);
1104 }
1105 block.element.paint(origin, visible_bounds, cx);
1106 }
1107 }
1108
1109 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1110 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1111 let style = &self.style;
1112
1113 cx.text_layout_cache
1114 .layout_str(
1115 "1".repeat(digit_count).as_str(),
1116 style.text.font_size,
1117 &[(
1118 digit_count,
1119 RunStyle {
1120 font_id: style.text.font_id,
1121 color: Color::black(),
1122 underline: Default::default(),
1123 },
1124 )],
1125 )
1126 .width()
1127 }
1128
1129 fn layout_line_numbers(
1130 &self,
1131 rows: Range<u32>,
1132 active_rows: &BTreeMap<u32, bool>,
1133 snapshot: &EditorSnapshot,
1134 cx: &LayoutContext,
1135 ) -> Vec<Option<text_layout::Line>> {
1136 let style = &self.style;
1137 let include_line_numbers = snapshot.mode == EditorMode::Full;
1138 let mut line_number_layouts = Vec::with_capacity(rows.len());
1139 let mut line_number = String::new();
1140 for (ix, row) in snapshot
1141 .buffer_rows(rows.start)
1142 .take((rows.end - rows.start) as usize)
1143 .enumerate()
1144 {
1145 let display_row = rows.start + ix as u32;
1146 let color = if active_rows.contains_key(&display_row) {
1147 style.line_number_active
1148 } else {
1149 style.line_number
1150 };
1151 if let Some(buffer_row) = row {
1152 if include_line_numbers {
1153 line_number.clear();
1154 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1155 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1156 &line_number,
1157 style.text.font_size,
1158 &[(
1159 line_number.len(),
1160 RunStyle {
1161 font_id: style.text.font_id,
1162 color,
1163 underline: Default::default(),
1164 },
1165 )],
1166 )));
1167 }
1168 } else {
1169 line_number_layouts.push(None);
1170 }
1171 }
1172
1173 line_number_layouts
1174 }
1175
1176 fn layout_lines(
1177 &mut self,
1178 rows: Range<u32>,
1179 snapshot: &EditorSnapshot,
1180 cx: &LayoutContext,
1181 ) -> Vec<text_layout::Line> {
1182 if rows.start >= rows.end {
1183 return Vec::new();
1184 }
1185
1186 // When the editor is empty and unfocused, then show the placeholder.
1187 if snapshot.is_empty() && !snapshot.is_focused() {
1188 let placeholder_style = self
1189 .style
1190 .placeholder_text
1191 .as_ref()
1192 .unwrap_or(&self.style.text);
1193 let placeholder_text = snapshot.placeholder_text();
1194 let placeholder_lines = placeholder_text
1195 .as_ref()
1196 .map_or("", AsRef::as_ref)
1197 .split('\n')
1198 .skip(rows.start as usize)
1199 .chain(iter::repeat(""))
1200 .take(rows.len());
1201 placeholder_lines
1202 .map(|line| {
1203 cx.text_layout_cache.layout_str(
1204 line,
1205 placeholder_style.font_size,
1206 &[(
1207 line.len(),
1208 RunStyle {
1209 font_id: placeholder_style.font_id,
1210 color: placeholder_style.color,
1211 underline: Default::default(),
1212 },
1213 )],
1214 )
1215 })
1216 .collect()
1217 } else {
1218 let style = &self.style;
1219 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1220 let mut highlight_style = chunk
1221 .syntax_highlight_id
1222 .and_then(|id| id.style(&style.syntax));
1223
1224 if let Some(chunk_highlight) = chunk.highlight_style {
1225 if let Some(highlight_style) = highlight_style.as_mut() {
1226 highlight_style.highlight(chunk_highlight);
1227 } else {
1228 highlight_style = Some(chunk_highlight);
1229 }
1230 }
1231
1232 let mut diagnostic_highlight = HighlightStyle::default();
1233
1234 if chunk.is_unnecessary {
1235 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1236 }
1237
1238 if let Some(severity) = chunk.diagnostic_severity {
1239 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1240 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1241 let diagnostic_style = super::diagnostic_style(severity, true, style);
1242 diagnostic_highlight.underline = Some(Underline {
1243 color: Some(diagnostic_style.message.text.color),
1244 thickness: 1.0.into(),
1245 squiggly: true,
1246 });
1247 }
1248 }
1249
1250 if let Some(highlight_style) = highlight_style.as_mut() {
1251 highlight_style.highlight(diagnostic_highlight);
1252 } else {
1253 highlight_style = Some(diagnostic_highlight);
1254 }
1255
1256 (chunk.text, highlight_style)
1257 });
1258 layout_highlighted_chunks(
1259 chunks,
1260 &style.text,
1261 cx.text_layout_cache,
1262 cx.font_cache,
1263 MAX_LINE_LEN,
1264 rows.len() as usize,
1265 )
1266 }
1267 }
1268
1269 #[allow(clippy::too_many_arguments)]
1270 fn layout_blocks(
1271 &mut self,
1272 rows: Range<u32>,
1273 snapshot: &EditorSnapshot,
1274 editor_width: f32,
1275 scroll_width: f32,
1276 gutter_padding: f32,
1277 gutter_width: f32,
1278 em_width: f32,
1279 text_x: f32,
1280 line_height: f32,
1281 style: &EditorStyle,
1282 line_layouts: &[text_layout::Line],
1283 cx: &mut LayoutContext,
1284 ) -> (f32, Vec<BlockLayout>) {
1285 let editor = if let Some(editor) = self.view.upgrade(cx) {
1286 editor
1287 } else {
1288 return Default::default();
1289 };
1290
1291 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1292 let scroll_x = snapshot.scroll_position.x();
1293 let (fixed_blocks, non_fixed_blocks) = snapshot
1294 .blocks_in_range(rows.clone())
1295 .partition::<Vec<_>, _>(|(_, block)| match block {
1296 TransformBlock::ExcerptHeader { .. } => false,
1297 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1298 });
1299 let mut render_block = |block: &TransformBlock, width: f32| {
1300 let mut element = match block {
1301 TransformBlock::Custom(block) => {
1302 let align_to = block
1303 .position()
1304 .to_point(&snapshot.buffer_snapshot)
1305 .to_display_point(snapshot);
1306 let anchor_x = text_x
1307 + if rows.contains(&align_to.row()) {
1308 line_layouts[(align_to.row() - rows.start) as usize]
1309 .x_for_index(align_to.column() as usize)
1310 } else {
1311 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1312 .x_for_index(align_to.column() as usize)
1313 };
1314
1315 cx.render(&editor, |_, cx| {
1316 block.render(&mut BlockContext {
1317 cx,
1318 anchor_x,
1319 gutter_padding,
1320 line_height,
1321 scroll_x,
1322 gutter_width,
1323 em_width,
1324 })
1325 })
1326 }
1327 TransformBlock::ExcerptHeader {
1328 key,
1329 buffer,
1330 range,
1331 starts_new_buffer,
1332 ..
1333 } => {
1334 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1335 let jump_position = range
1336 .primary
1337 .as_ref()
1338 .map_or(range.context.start, |primary| primary.start);
1339 let jump_action = crate::Jump {
1340 path: ProjectPath {
1341 worktree_id: file.worktree_id(cx),
1342 path: file.path.clone(),
1343 },
1344 position: language::ToPoint::to_point(&jump_position, buffer),
1345 anchor: jump_position,
1346 };
1347
1348 enum JumpIcon {}
1349 cx.render(&editor, |_, cx| {
1350 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1351 let style = style.jump_icon.style_for(state, false);
1352 Svg::new("icons/arrow_up_right_8.svg")
1353 .with_color(style.color)
1354 .constrained()
1355 .with_width(style.icon_width)
1356 .aligned()
1357 .contained()
1358 .with_style(style.container)
1359 .constrained()
1360 .with_width(style.button_width)
1361 .with_height(style.button_width)
1362 .boxed()
1363 })
1364 .with_cursor_style(CursorStyle::PointingHand)
1365 .on_click(MouseButton::Left, move |_, cx| {
1366 cx.dispatch_action(jump_action.clone())
1367 })
1368 .with_tooltip::<JumpIcon, _>(
1369 *key,
1370 "Jump to Buffer".to_string(),
1371 Some(Box::new(crate::OpenExcerpts)),
1372 tooltip_style.clone(),
1373 cx,
1374 )
1375 .aligned()
1376 .flex_float()
1377 .boxed()
1378 })
1379 });
1380
1381 if *starts_new_buffer {
1382 let style = &self.style.diagnostic_path_header;
1383 let font_size =
1384 (style.text_scale_factor * self.style.text.font_size).round();
1385
1386 let mut filename = None;
1387 let mut parent_path = None;
1388 if let Some(file) = buffer.file() {
1389 let path = file.path();
1390 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1391 parent_path =
1392 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1393 }
1394
1395 Flex::row()
1396 .with_child(
1397 Label::new(
1398 filename.unwrap_or_else(|| "untitled".to_string()),
1399 style.filename.text.clone().with_font_size(font_size),
1400 )
1401 .contained()
1402 .with_style(style.filename.container)
1403 .aligned()
1404 .boxed(),
1405 )
1406 .with_children(parent_path.map(|path| {
1407 Label::new(path, style.path.text.clone().with_font_size(font_size))
1408 .contained()
1409 .with_style(style.path.container)
1410 .aligned()
1411 .boxed()
1412 }))
1413 .with_children(jump_icon)
1414 .contained()
1415 .with_style(style.container)
1416 .with_padding_left(gutter_padding)
1417 .with_padding_right(gutter_padding)
1418 .expanded()
1419 .named("path header block")
1420 } else {
1421 let text_style = self.style.text.clone();
1422 Flex::row()
1423 .with_child(Label::new("…".to_string(), text_style).boxed())
1424 .with_children(jump_icon)
1425 .contained()
1426 .with_padding_left(gutter_padding)
1427 .with_padding_right(gutter_padding)
1428 .expanded()
1429 .named("collapsed context")
1430 }
1431 }
1432 };
1433
1434 element.layout(
1435 SizeConstraint {
1436 min: Vector2F::zero(),
1437 max: vec2f(width, block.height() as f32 * line_height),
1438 },
1439 cx,
1440 );
1441 element
1442 };
1443
1444 let mut fixed_block_max_width = 0f32;
1445 let mut blocks = Vec::new();
1446 for (row, block) in fixed_blocks {
1447 let element = render_block(block, f32::INFINITY);
1448 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1449 blocks.push(BlockLayout {
1450 row,
1451 element,
1452 style: BlockStyle::Fixed,
1453 });
1454 }
1455 for (row, block) in non_fixed_blocks {
1456 let style = match block {
1457 TransformBlock::Custom(block) => block.style(),
1458 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1459 };
1460 let width = match style {
1461 BlockStyle::Sticky => editor_width,
1462 BlockStyle::Flex => editor_width
1463 .max(fixed_block_max_width)
1464 .max(gutter_width + scroll_width),
1465 BlockStyle::Fixed => unreachable!(),
1466 };
1467 let element = render_block(block, width);
1468 blocks.push(BlockLayout {
1469 row,
1470 element,
1471 style,
1472 });
1473 }
1474 (
1475 scroll_width.max(fixed_block_max_width - gutter_width),
1476 blocks,
1477 )
1478 }
1479}
1480
1481/// Get the hunk that contains buffer_line, starting from start_idx
1482/// Returns none if there is none found, and
1483fn get_hunk(buffer_line: u32, hunks: &[DiffHunk<u32>]) -> Option<&DiffHunk<u32>> {
1484 for i in 0..hunks.len() {
1485 // Safety: Index out of bounds is handled by the check above
1486 let hunk = hunks.get(i).unwrap();
1487 if hunk.buffer_range.contains(&(buffer_line as u32)) {
1488 return Some(hunk);
1489 } else if hunk.status() == DiffHunkStatus::Removed && buffer_line == hunk.buffer_range.start
1490 {
1491 return Some(hunk);
1492 } else if hunk.buffer_range.start > buffer_line as u32 {
1493 // If we've passed the buffer_line, just stop
1494 return None;
1495 }
1496 }
1497
1498 // We reached the end of the array without finding a hunk, just return none.
1499 return None;
1500}
1501
1502impl Element for EditorElement {
1503 type LayoutState = LayoutState;
1504 type PaintState = ();
1505
1506 fn layout(
1507 &mut self,
1508 constraint: SizeConstraint,
1509 cx: &mut LayoutContext,
1510 ) -> (Vector2F, Self::LayoutState) {
1511 let mut size = constraint.max;
1512 if size.x().is_infinite() {
1513 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1514 }
1515
1516 let snapshot = self.snapshot(cx.app);
1517 let style = self.style.clone();
1518 let line_height = style.text.line_height(cx.font_cache);
1519
1520 let gutter_padding;
1521 let gutter_width;
1522 let gutter_margin;
1523 if snapshot.mode == EditorMode::Full {
1524 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1525 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1526 gutter_margin = -style.text.descent(cx.font_cache);
1527 } else {
1528 gutter_padding = 0.0;
1529 gutter_width = 0.0;
1530 gutter_margin = 0.0;
1531 };
1532
1533 let text_width = size.x() - gutter_width;
1534 let em_width = style.text.em_width(cx.font_cache);
1535 let em_advance = style.text.em_advance(cx.font_cache);
1536 let overscroll = vec2f(em_width, 0.);
1537 let snapshot = self.update_view(cx.app, |view, cx| {
1538 view.set_visible_line_count(size.y() / line_height);
1539
1540 let wrap_width = match view.soft_wrap_mode(cx) {
1541 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1542 SoftWrap::EditorWidth => {
1543 Some(text_width - gutter_margin - overscroll.x() - em_width)
1544 }
1545 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1546 };
1547
1548 if view.set_wrap_width(wrap_width, cx) {
1549 view.snapshot(cx)
1550 } else {
1551 snapshot
1552 }
1553 });
1554
1555 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1556 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1557 size.set_y(
1558 scroll_height
1559 .min(constraint.max_along(Axis::Vertical))
1560 .max(constraint.min_along(Axis::Vertical))
1561 .min(line_height * max_lines as f32),
1562 )
1563 } else if let EditorMode::SingleLine = snapshot.mode {
1564 size.set_y(
1565 line_height
1566 .min(constraint.max_along(Axis::Vertical))
1567 .max(constraint.min_along(Axis::Vertical)),
1568 )
1569 } else if size.y().is_infinite() {
1570 size.set_y(scroll_height);
1571 }
1572 let gutter_size = vec2f(gutter_width, size.y());
1573 let text_size = vec2f(text_width, size.y());
1574
1575 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1576 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1577 let snapshot = view.snapshot(cx);
1578 (autoscroll_horizontally, snapshot)
1579 });
1580
1581 let scroll_position = snapshot.scroll_position();
1582 // The scroll position is a fractional point, the whole number of which represents
1583 // the top of the window in terms of display rows.
1584 let start_row = scroll_position.y() as u32;
1585 let visible_row_count = (size.y() / line_height).ceil() as u32;
1586 let max_row = snapshot.max_point().row();
1587
1588 // Add 1 to ensure selections bleed off screen
1589 let end_row = 1 + cmp::min(start_row + visible_row_count, max_row);
1590
1591 let start_anchor = if start_row == 0 {
1592 Anchor::min()
1593 } else {
1594 snapshot
1595 .buffer_snapshot
1596 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1597 };
1598 let end_anchor = if end_row > max_row {
1599 Anchor::max()
1600 } else {
1601 snapshot
1602 .buffer_snapshot
1603 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1604 };
1605
1606 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1607 let mut active_rows = BTreeMap::new();
1608 let mut highlighted_rows = None;
1609 let mut highlighted_ranges = Vec::new();
1610 let mut show_scrollbars = false;
1611 self.update_view(cx.app, |view, cx| {
1612 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1613
1614 highlighted_rows = view.highlighted_rows();
1615 let theme = cx.global::<Settings>().theme.as_ref();
1616 highlighted_ranges = view.background_highlights_in_range(
1617 start_anchor.clone()..end_anchor.clone(),
1618 &display_map,
1619 theme,
1620 );
1621
1622 let mut remote_selections = HashMap::default();
1623 for (replica_id, line_mode, selection) in display_map
1624 .buffer_snapshot
1625 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1626 {
1627 // The local selections match the leader's selections.
1628 if Some(replica_id) == view.leader_replica_id {
1629 continue;
1630 }
1631 remote_selections
1632 .entry(replica_id)
1633 .or_insert(Vec::new())
1634 .push(SelectionLayout::new(selection, line_mode, &display_map));
1635 }
1636 selections.extend(remote_selections);
1637
1638 if view.show_local_selections {
1639 let mut local_selections = view
1640 .selections
1641 .disjoint_in_range(start_anchor..end_anchor, cx);
1642 local_selections.extend(view.selections.pending(cx));
1643 for selection in &local_selections {
1644 let is_empty = selection.start == selection.end;
1645 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1646 let selection_end = snapshot.next_line_boundary(selection.end).1;
1647 for row in cmp::max(selection_start.row(), start_row)
1648 ..=cmp::min(selection_end.row(), end_row)
1649 {
1650 let contains_non_empty_selection =
1651 active_rows.entry(row).or_insert(!is_empty);
1652 *contains_non_empty_selection |= !is_empty;
1653 }
1654 }
1655
1656 // Render the local selections in the leader's color when following.
1657 let local_replica_id = view
1658 .leader_replica_id
1659 .unwrap_or_else(|| view.replica_id(cx));
1660
1661 selections.push((
1662 local_replica_id,
1663 local_selections
1664 .into_iter()
1665 .map(|selection| {
1666 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1667 })
1668 .collect(),
1669 ));
1670 }
1671
1672 show_scrollbars = view.show_scrollbars();
1673 });
1674
1675 let line_number_layouts =
1676 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1677
1678 let diff_hunks = snapshot
1679 .buffer_snapshot
1680 .git_diff_hunks_in_range(start_row..end_row)
1681 .collect();
1682
1683 let scrollbar_row_range =
1684 scroll_position.y()..(scroll_position.y() + visible_row_count as f32);
1685
1686 let mut max_visible_line_width = 0.0;
1687 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1688 for line in &line_layouts {
1689 if line.width() > max_visible_line_width {
1690 max_visible_line_width = line.width();
1691 }
1692 }
1693
1694 let style = self.style.clone();
1695 let longest_line_width = layout_line(
1696 snapshot.longest_row(),
1697 &snapshot,
1698 &style,
1699 cx.text_layout_cache,
1700 )
1701 .width();
1702 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1703 let em_width = style.text.em_width(cx.font_cache);
1704 let (scroll_width, blocks) = self.layout_blocks(
1705 start_row..end_row,
1706 &snapshot,
1707 size.x(),
1708 scroll_width,
1709 gutter_padding,
1710 gutter_width,
1711 em_width,
1712 gutter_width + gutter_margin,
1713 line_height,
1714 &style,
1715 &line_layouts,
1716 cx,
1717 );
1718
1719 let scroll_max = vec2f(
1720 ((scroll_width - text_size.x()) / em_width).max(0.0),
1721 max_row as f32,
1722 );
1723
1724 self.update_view(cx.app, |view, cx| {
1725 let clamped = view.clamp_scroll_left(scroll_max.x());
1726
1727 let autoscrolled = if autoscroll_horizontally {
1728 view.autoscroll_horizontally(
1729 start_row,
1730 text_size.x(),
1731 scroll_width,
1732 em_width,
1733 &line_layouts,
1734 cx,
1735 )
1736 } else {
1737 false
1738 };
1739
1740 if clamped || autoscrolled {
1741 snapshot = view.snapshot(cx);
1742 }
1743 });
1744
1745 let mut context_menu = None;
1746 let mut code_actions_indicator = None;
1747 let mut hover = None;
1748 let mut mode = EditorMode::Full;
1749 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1750 let newest_selection_head = view
1751 .selections
1752 .newest::<usize>(cx)
1753 .head()
1754 .to_display_point(&snapshot);
1755
1756 let style = view.style(cx);
1757 if (start_row..end_row).contains(&newest_selection_head.row()) {
1758 if view.context_menu_visible() {
1759 context_menu =
1760 view.render_context_menu(newest_selection_head, style.clone(), cx);
1761 }
1762
1763 code_actions_indicator = view
1764 .render_code_actions_indicator(&style, cx)
1765 .map(|indicator| (newest_selection_head.row(), indicator));
1766 }
1767
1768 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1769 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1770 mode = view.mode;
1771 });
1772
1773 if let Some((_, context_menu)) = context_menu.as_mut() {
1774 context_menu.layout(
1775 SizeConstraint {
1776 min: Vector2F::zero(),
1777 max: vec2f(
1778 cx.window_size.x() * 0.7,
1779 (12. * line_height).min((size.y() - line_height) / 2.),
1780 ),
1781 },
1782 cx,
1783 );
1784 }
1785
1786 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1787 indicator.layout(
1788 SizeConstraint::strict_along(
1789 Axis::Vertical,
1790 line_height * style.code_actions.vertical_scale,
1791 ),
1792 cx,
1793 );
1794 }
1795
1796 if let Some((_, hover_popovers)) = hover.as_mut() {
1797 for hover_popover in hover_popovers.iter_mut() {
1798 hover_popover.layout(
1799 SizeConstraint {
1800 min: Vector2F::zero(),
1801 max: vec2f(
1802 (120. * em_width) // Default size
1803 .min(size.x() / 2.) // Shrink to half of the editor width
1804 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1805 (16. * line_height) // Default size
1806 .min(size.y() / 2.) // Shrink to half of the editor height
1807 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1808 ),
1809 },
1810 cx,
1811 );
1812 }
1813 }
1814
1815 (
1816 size,
1817 LayoutState {
1818 mode,
1819 position_map: Arc::new(PositionMap {
1820 size,
1821 scroll_max,
1822 line_layouts,
1823 line_height,
1824 em_width,
1825 em_advance,
1826 snapshot,
1827 }),
1828 gutter_size,
1829 gutter_padding,
1830 text_size,
1831 scrollbar_row_range,
1832 show_scrollbars,
1833 max_row,
1834 gutter_margin,
1835 active_rows,
1836 highlighted_rows,
1837 highlighted_ranges,
1838 line_number_layouts,
1839 diff_hunks,
1840 blocks,
1841 selections,
1842 context_menu,
1843 code_actions_indicator,
1844 hover_popovers: hover,
1845 },
1846 )
1847 }
1848
1849 fn paint(
1850 &mut self,
1851 bounds: RectF,
1852 visible_bounds: RectF,
1853 layout: &mut Self::LayoutState,
1854 cx: &mut PaintContext,
1855 ) -> Self::PaintState {
1856 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
1857 cx.scene.push_layer(Some(visible_bounds));
1858
1859 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1860 let text_bounds = RectF::new(
1861 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1862 layout.text_size,
1863 );
1864
1865 Self::attach_mouse_handlers(
1866 &self.view,
1867 &layout.position_map,
1868 visible_bounds,
1869 text_bounds,
1870 gutter_bounds,
1871 bounds,
1872 cx,
1873 );
1874
1875 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1876 if layout.gutter_size.x() > 0. {
1877 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1878 }
1879 self.paint_text(text_bounds, visible_bounds, layout, cx);
1880
1881 cx.scene.push_layer(Some(bounds));
1882 if !layout.blocks.is_empty() {
1883 self.paint_blocks(bounds, visible_bounds, layout, cx);
1884 }
1885 self.paint_scrollbar(bounds, layout, cx);
1886 cx.scene.pop_layer();
1887
1888 cx.scene.pop_layer();
1889 }
1890
1891 fn dispatch_event(
1892 &mut self,
1893 event: &Event,
1894 _: RectF,
1895 _: RectF,
1896 _: &mut LayoutState,
1897 _: &mut (),
1898 cx: &mut EventContext,
1899 ) -> bool {
1900 if let Event::ModifiersChanged(event) = event {
1901 self.modifiers_changed(*event, cx);
1902 }
1903
1904 false
1905 }
1906
1907 fn rect_for_text_range(
1908 &self,
1909 range_utf16: Range<usize>,
1910 bounds: RectF,
1911 _: RectF,
1912 layout: &Self::LayoutState,
1913 _: &Self::PaintState,
1914 _: &gpui::MeasurementContext,
1915 ) -> Option<RectF> {
1916 let text_bounds = RectF::new(
1917 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1918 layout.text_size,
1919 );
1920 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1921 let scroll_position = layout.position_map.snapshot.scroll_position();
1922 let start_row = scroll_position.y() as u32;
1923 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1924 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1925
1926 let range_start = OffsetUtf16(range_utf16.start)
1927 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1928 if range_start.row() < start_row {
1929 return None;
1930 }
1931
1932 let line = layout
1933 .position_map
1934 .line_layouts
1935 .get((range_start.row() - start_row) as usize)?;
1936 let range_start_x = line.x_for_index(range_start.column() as usize);
1937 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1938 Some(RectF::new(
1939 content_origin
1940 + vec2f(
1941 range_start_x,
1942 range_start_y + layout.position_map.line_height,
1943 )
1944 - vec2f(scroll_left, scroll_top),
1945 vec2f(
1946 layout.position_map.em_width,
1947 layout.position_map.line_height,
1948 ),
1949 ))
1950 }
1951
1952 fn debug(
1953 &self,
1954 bounds: RectF,
1955 _: &Self::LayoutState,
1956 _: &Self::PaintState,
1957 _: &gpui::DebugContext,
1958 ) -> json::Value {
1959 json!({
1960 "type": "BufferElement",
1961 "bounds": bounds.to_json()
1962 })
1963 }
1964}
1965
1966pub struct LayoutState {
1967 position_map: Arc<PositionMap>,
1968 gutter_size: Vector2F,
1969 gutter_padding: f32,
1970 gutter_margin: f32,
1971 text_size: Vector2F,
1972 mode: EditorMode,
1973 active_rows: BTreeMap<u32, bool>,
1974 highlighted_rows: Option<Range<u32>>,
1975 line_number_layouts: Vec<Option<text_layout::Line>>,
1976 blocks: Vec<BlockLayout>,
1977 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1978 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1979 scrollbar_row_range: Range<f32>,
1980 show_scrollbars: bool,
1981 max_row: u32,
1982 context_menu: Option<(DisplayPoint, ElementBox)>,
1983 diff_hunks: Vec<DiffHunk<u32>>,
1984 code_actions_indicator: Option<(u32, ElementBox)>,
1985 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
1986}
1987
1988pub struct PositionMap {
1989 size: Vector2F,
1990 line_height: f32,
1991 scroll_max: Vector2F,
1992 em_width: f32,
1993 em_advance: f32,
1994 line_layouts: Vec<text_layout::Line>,
1995 snapshot: EditorSnapshot,
1996}
1997
1998impl PositionMap {
1999 /// Returns two display points:
2000 /// 1. The nearest *valid* position in the editor
2001 /// 2. An unclipped, potentially *invalid* position that maps directly to
2002 /// the given pixel position.
2003 fn point_for_position(
2004 &self,
2005 text_bounds: RectF,
2006 position: Vector2F,
2007 ) -> (DisplayPoint, DisplayPoint) {
2008 let scroll_position = self.snapshot.scroll_position();
2009 let position = position - text_bounds.origin();
2010 let y = position.y().max(0.0).min(self.size.y());
2011 let x = position.x() + (scroll_position.x() * self.em_width);
2012 let row = (y / self.line_height + scroll_position.y()) as u32;
2013 let (column, x_overshoot) = if let Some(line) = self
2014 .line_layouts
2015 .get(row as usize - scroll_position.y() as usize)
2016 {
2017 if let Some(ix) = line.index_for_x(x) {
2018 (ix as u32, 0.0)
2019 } else {
2020 (line.len() as u32, 0f32.max(x - line.width()))
2021 }
2022 } else {
2023 (0, x)
2024 };
2025
2026 let mut target_point = DisplayPoint::new(row, column);
2027 let point = self.snapshot.clip_point(target_point, Bias::Left);
2028 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2029
2030 (point, target_point)
2031 }
2032}
2033
2034struct BlockLayout {
2035 row: u32,
2036 element: ElementBox,
2037 style: BlockStyle,
2038}
2039
2040fn layout_line(
2041 row: u32,
2042 snapshot: &EditorSnapshot,
2043 style: &EditorStyle,
2044 layout_cache: &TextLayoutCache,
2045) -> text_layout::Line {
2046 let mut line = snapshot.line(row);
2047
2048 if line.len() > MAX_LINE_LEN {
2049 let mut len = MAX_LINE_LEN;
2050 while !line.is_char_boundary(len) {
2051 len -= 1;
2052 }
2053
2054 line.truncate(len);
2055 }
2056
2057 layout_cache.layout_str(
2058 &line,
2059 style.text.font_size,
2060 &[(
2061 snapshot.line_len(row) as usize,
2062 RunStyle {
2063 font_id: style.text.font_id,
2064 color: Color::black(),
2065 underline: Default::default(),
2066 },
2067 )],
2068 )
2069}
2070
2071#[derive(Copy, Clone, PartialEq, Eq, Debug)]
2072pub enum CursorShape {
2073 Bar,
2074 Block,
2075 Underscore,
2076 Hollow,
2077}
2078
2079impl Default for CursorShape {
2080 fn default() -> Self {
2081 CursorShape::Bar
2082 }
2083}
2084
2085#[derive(Debug)]
2086pub struct Cursor {
2087 origin: Vector2F,
2088 block_width: f32,
2089 line_height: f32,
2090 color: Color,
2091 shape: CursorShape,
2092 block_text: Option<Line>,
2093}
2094
2095impl Cursor {
2096 pub fn new(
2097 origin: Vector2F,
2098 block_width: f32,
2099 line_height: f32,
2100 color: Color,
2101 shape: CursorShape,
2102 block_text: Option<Line>,
2103 ) -> Cursor {
2104 Cursor {
2105 origin,
2106 block_width,
2107 line_height,
2108 color,
2109 shape,
2110 block_text,
2111 }
2112 }
2113
2114 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2115 RectF::new(
2116 self.origin + origin,
2117 vec2f(self.block_width, self.line_height),
2118 )
2119 }
2120
2121 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2122 let bounds = match self.shape {
2123 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2124 CursorShape::Block | CursorShape::Hollow => RectF::new(
2125 self.origin + origin,
2126 vec2f(self.block_width, self.line_height),
2127 ),
2128 CursorShape::Underscore => RectF::new(
2129 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2130 vec2f(self.block_width, 2.0),
2131 ),
2132 };
2133
2134 //Draw background or border quad
2135 if matches!(self.shape, CursorShape::Hollow) {
2136 cx.scene.push_quad(Quad {
2137 bounds,
2138 background: None,
2139 border: Border::all(1., self.color),
2140 corner_radius: 0.,
2141 });
2142 } else {
2143 cx.scene.push_quad(Quad {
2144 bounds,
2145 background: Some(self.color),
2146 border: Default::default(),
2147 corner_radius: 0.,
2148 });
2149 }
2150
2151 if let Some(block_text) = &self.block_text {
2152 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2153 }
2154 }
2155
2156 pub fn shape(&self) -> CursorShape {
2157 self.shape
2158 }
2159}
2160
2161#[derive(Debug)]
2162pub struct HighlightedRange {
2163 pub start_y: f32,
2164 pub line_height: f32,
2165 pub lines: Vec<HighlightedRangeLine>,
2166 pub color: Color,
2167 pub corner_radius: f32,
2168}
2169
2170#[derive(Debug)]
2171pub struct HighlightedRangeLine {
2172 pub start_x: f32,
2173 pub end_x: f32,
2174}
2175
2176impl HighlightedRange {
2177 pub fn paint(&self, bounds: RectF, scene: &mut Scene) {
2178 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2179 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2180 self.paint_lines(
2181 self.start_y + self.line_height,
2182 &self.lines[1..],
2183 bounds,
2184 scene,
2185 );
2186 } else {
2187 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2188 }
2189 }
2190
2191 fn paint_lines(
2192 &self,
2193 start_y: f32,
2194 lines: &[HighlightedRangeLine],
2195 bounds: RectF,
2196 scene: &mut Scene,
2197 ) {
2198 if lines.is_empty() {
2199 return;
2200 }
2201
2202 let mut path = PathBuilder::new();
2203 let first_line = lines.first().unwrap();
2204 let last_line = lines.last().unwrap();
2205
2206 let first_top_left = vec2f(first_line.start_x, start_y);
2207 let first_top_right = vec2f(first_line.end_x, start_y);
2208
2209 let curve_height = vec2f(0., self.corner_radius);
2210 let curve_width = |start_x: f32, end_x: f32| {
2211 let max = (end_x - start_x) / 2.;
2212 let width = if max < self.corner_radius {
2213 max
2214 } else {
2215 self.corner_radius
2216 };
2217
2218 vec2f(width, 0.)
2219 };
2220
2221 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2222 path.reset(first_top_right - top_curve_width);
2223 path.curve_to(first_top_right + curve_height, first_top_right);
2224
2225 let mut iter = lines.iter().enumerate().peekable();
2226 while let Some((ix, line)) = iter.next() {
2227 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2228
2229 if let Some((_, next_line)) = iter.peek() {
2230 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2231
2232 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2233 Ordering::Equal => {
2234 path.line_to(bottom_right);
2235 }
2236 Ordering::Less => {
2237 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2238 path.line_to(bottom_right - curve_height);
2239 if self.corner_radius > 0. {
2240 path.curve_to(bottom_right - curve_width, bottom_right);
2241 }
2242 path.line_to(next_top_right + curve_width);
2243 if self.corner_radius > 0. {
2244 path.curve_to(next_top_right + curve_height, next_top_right);
2245 }
2246 }
2247 Ordering::Greater => {
2248 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2249 path.line_to(bottom_right - curve_height);
2250 if self.corner_radius > 0. {
2251 path.curve_to(bottom_right + curve_width, bottom_right);
2252 }
2253 path.line_to(next_top_right - curve_width);
2254 if self.corner_radius > 0. {
2255 path.curve_to(next_top_right + curve_height, next_top_right);
2256 }
2257 }
2258 }
2259 } else {
2260 let curve_width = curve_width(line.start_x, line.end_x);
2261 path.line_to(bottom_right - curve_height);
2262 if self.corner_radius > 0. {
2263 path.curve_to(bottom_right - curve_width, bottom_right);
2264 }
2265
2266 let bottom_left = vec2f(line.start_x, bottom_right.y());
2267 path.line_to(bottom_left + curve_width);
2268 if self.corner_radius > 0. {
2269 path.curve_to(bottom_left - curve_height, bottom_left);
2270 }
2271 }
2272 }
2273
2274 if first_line.start_x > last_line.start_x {
2275 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2276 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2277 path.line_to(second_top_left + curve_height);
2278 if self.corner_radius > 0. {
2279 path.curve_to(second_top_left + curve_width, second_top_left);
2280 }
2281 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2282 path.line_to(first_bottom_left - curve_width);
2283 if self.corner_radius > 0. {
2284 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2285 }
2286 }
2287
2288 path.line_to(first_top_left + curve_height);
2289 if self.corner_radius > 0. {
2290 path.curve_to(first_top_left + top_curve_width, first_top_left);
2291 }
2292 path.line_to(first_top_right - top_curve_width);
2293
2294 scene.push_path(path.build(self.color, Some(bounds)));
2295 }
2296}
2297
2298pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2299 delta.powf(1.5) / 100.0
2300}
2301
2302fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2303 delta.powf(1.2) / 300.0
2304}
2305
2306#[cfg(test)]
2307mod tests {
2308 use std::sync::Arc;
2309
2310 use super::*;
2311 use crate::{
2312 display_map::{BlockDisposition, BlockProperties},
2313 Editor, MultiBuffer,
2314 };
2315 use settings::Settings;
2316 use util::test::sample_text;
2317
2318 #[gpui::test]
2319 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2320 cx.set_global(Settings::test(cx));
2321 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2322 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2323 Editor::new(EditorMode::Full, buffer, None, None, cx)
2324 });
2325 let element = EditorElement::new(
2326 editor.downgrade(),
2327 editor.read(cx).style(cx),
2328 CursorShape::Bar,
2329 );
2330
2331 let layouts = editor.update(cx, |editor, cx| {
2332 let snapshot = editor.snapshot(cx);
2333 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2334 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2335 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &layout_cx)
2336 });
2337 assert_eq!(layouts.len(), 6);
2338 }
2339
2340 #[gpui::test]
2341 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2342 cx.set_global(Settings::test(cx));
2343 let buffer = MultiBuffer::build_simple("", cx);
2344 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2345 Editor::new(EditorMode::Full, buffer, None, None, cx)
2346 });
2347
2348 editor.update(cx, |editor, cx| {
2349 editor.set_placeholder_text("hello", cx);
2350 editor.insert_blocks(
2351 [BlockProperties {
2352 style: BlockStyle::Fixed,
2353 disposition: BlockDisposition::Above,
2354 height: 3,
2355 position: Anchor::min(),
2356 render: Arc::new(|_| Empty::new().boxed()),
2357 }],
2358 cx,
2359 );
2360
2361 // Blur the editor so that it displays placeholder text.
2362 cx.blur();
2363 });
2364
2365 let mut element = EditorElement::new(
2366 editor.downgrade(),
2367 editor.read(cx).style(cx),
2368 CursorShape::Bar,
2369 );
2370
2371 let mut scene = Scene::new(1.0);
2372 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2373 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2374 let (size, mut state) = element.layout(
2375 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2376 &mut layout_cx,
2377 );
2378
2379 assert_eq!(state.position_map.line_layouts.len(), 4);
2380 assert_eq!(
2381 state
2382 .line_number_layouts
2383 .iter()
2384 .map(Option::is_some)
2385 .collect::<Vec<_>>(),
2386 &[false, false, false, true]
2387 );
2388
2389 // Don't panic.
2390 let bounds = RectF::new(Default::default(), size);
2391 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2392 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2393 }
2394}