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 AnchorRangeExt, EditorStyle,
16};
17use clock::ReplicaId;
18use collections::{BTreeMap, HashMap};
19use git::diff::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, CursorShape, DiagnosticSeverity, OffsetUtf16, Point, 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};
49
50#[derive(Debug)]
51struct DiffHunkLayout {
52 visual_range: Range<u32>,
53 status: DiffHunkStatus,
54 is_folded: bool,
55}
56
57struct SelectionLayout {
58 head: DisplayPoint,
59 cursor_shape: CursorShape,
60 range: Range<DisplayPoint>,
61}
62
63impl SelectionLayout {
64 fn new<T: ToPoint + ToDisplayPoint + Clone>(
65 selection: Selection<T>,
66 line_mode: bool,
67 cursor_shape: CursorShape,
68 map: &DisplaySnapshot,
69 ) -> Self {
70 if line_mode {
71 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
72 let point_range = map.expand_to_line(selection.range());
73 Self {
74 head: selection.head().to_display_point(map),
75 cursor_shape,
76 range: point_range.start.to_display_point(map)
77 ..point_range.end.to_display_point(map),
78 }
79 } else {
80 let selection = selection.map(|p| p.to_display_point(map));
81 Self {
82 head: selection.head(),
83 cursor_shape,
84 range: selection.range(),
85 }
86 }
87 }
88}
89
90#[derive(Clone)]
91pub struct EditorElement {
92 view: WeakViewHandle<Editor>,
93 style: Arc<EditorStyle>,
94}
95
96impl EditorElement {
97 pub fn new(view: WeakViewHandle<Editor>, style: EditorStyle) -> Self {
98 Self {
99 view,
100 style: Arc::new(style),
101 }
102 }
103
104 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
105 self.view.upgrade(cx).unwrap().read(cx)
106 }
107
108 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
109 where
110 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
111 {
112 self.view.upgrade(cx).unwrap().update(cx, f)
113 }
114
115 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
116 self.update_view(cx, |view, cx| view.snapshot(cx))
117 }
118
119 fn attach_mouse_handlers(
120 view: &WeakViewHandle<Editor>,
121 position_map: &Arc<PositionMap>,
122 visible_bounds: RectF,
123 text_bounds: RectF,
124 gutter_bounds: RectF,
125 bounds: RectF,
126 cx: &mut PaintContext,
127 ) {
128 enum EditorElementMouseHandlers {}
129 cx.scene.push_mouse_region(
130 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
131 .on_down(MouseButton::Left, {
132 let position_map = position_map.clone();
133 move |e, cx| {
134 if !Self::mouse_down(
135 e.platform_event,
136 position_map.as_ref(),
137 text_bounds,
138 gutter_bounds,
139 cx,
140 ) {
141 cx.propogate_event();
142 }
143 }
144 })
145 .on_down(MouseButton::Right, {
146 let position_map = position_map.clone();
147 move |e, cx| {
148 if !Self::mouse_right_down(
149 e.position,
150 position_map.as_ref(),
151 text_bounds,
152 cx,
153 ) {
154 cx.propogate_event();
155 }
156 }
157 })
158 .on_up(MouseButton::Left, {
159 let view = view.clone();
160 let position_map = position_map.clone();
161 move |e, cx| {
162 if !Self::mouse_up(
163 view.clone(),
164 e.position,
165 e.cmd,
166 e.shift,
167 position_map.as_ref(),
168 text_bounds,
169 cx,
170 ) {
171 cx.propogate_event()
172 }
173 }
174 })
175 .on_drag(MouseButton::Left, {
176 let view = view.clone();
177 let position_map = position_map.clone();
178 move |e, cx| {
179 if !Self::mouse_dragged(
180 view.clone(),
181 e.platform_event,
182 position_map.as_ref(),
183 text_bounds,
184 cx,
185 ) {
186 cx.propogate_event()
187 }
188 }
189 })
190 .on_move({
191 let position_map = position_map.clone();
192 move |e, cx| {
193 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
194 cx.propogate_event()
195 }
196 }
197 })
198 .on_scroll({
199 let position_map = position_map.clone();
200 move |e, cx| {
201 if !Self::scroll(e.position, e.delta, e.precise, &position_map, bounds, cx)
202 {
203 cx.propogate_event()
204 }
205 }
206 }),
207 );
208 }
209
210 fn mouse_down(
211 MouseButtonEvent {
212 position,
213 ctrl,
214 alt,
215 shift,
216 cmd,
217 mut click_count,
218 ..
219 }: MouseButtonEvent,
220 position_map: &PositionMap,
221 text_bounds: RectF,
222 gutter_bounds: RectF,
223 cx: &mut EventContext,
224 ) -> bool {
225 if gutter_bounds.contains_point(position) {
226 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
227 } else if !text_bounds.contains_point(position) {
228 return false;
229 }
230
231 let (position, target_position) = position_map.point_for_position(text_bounds, position);
232
233 if shift && alt {
234 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
235 position,
236 goal_column: target_position.column(),
237 }));
238 } else if shift && !ctrl && !alt && !cmd {
239 cx.dispatch_action(Select(SelectPhase::Extend {
240 position,
241 click_count,
242 }));
243 } else {
244 cx.dispatch_action(Select(SelectPhase::Begin {
245 position,
246 add: alt,
247 click_count,
248 }));
249 }
250
251 true
252 }
253
254 fn mouse_right_down(
255 position: Vector2F,
256 position_map: &PositionMap,
257 text_bounds: RectF,
258 cx: &mut EventContext,
259 ) -> bool {
260 if !text_bounds.contains_point(position) {
261 return false;
262 }
263
264 let (point, _) = position_map.point_for_position(text_bounds, position);
265
266 cx.dispatch_action(DeployMouseContextMenu { position, point });
267 true
268 }
269
270 fn mouse_up(
271 view: WeakViewHandle<Editor>,
272 position: Vector2F,
273 cmd: bool,
274 shift: bool,
275 position_map: &PositionMap,
276 text_bounds: RectF,
277 cx: &mut EventContext,
278 ) -> bool {
279 let view = view.upgrade(cx.app).unwrap().read(cx.app);
280 let end_selection = view.has_pending_selection();
281 let pending_nonempty_selections = view.has_pending_nonempty_selection();
282
283 if end_selection {
284 cx.dispatch_action(Select(SelectPhase::End));
285 }
286
287 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
288 let (point, target_point) = position_map.point_for_position(text_bounds, position);
289
290 if point == target_point {
291 if shift {
292 cx.dispatch_action(GoToFetchedTypeDefinition { point });
293 } else {
294 cx.dispatch_action(GoToFetchedDefinition { point });
295 }
296
297 return true;
298 }
299 }
300
301 end_selection
302 }
303
304 fn mouse_dragged(
305 view: WeakViewHandle<Editor>,
306 MouseMovedEvent {
307 cmd,
308 shift,
309 position,
310 ..
311 }: MouseMovedEvent,
312 position_map: &PositionMap,
313 text_bounds: RectF,
314 cx: &mut EventContext,
315 ) -> bool {
316 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
317 // Don't trigger hover popover if mouse is hovering over context menu
318 let point = if text_bounds.contains_point(position) {
319 let (point, target_point) = position_map.point_for_position(text_bounds, position);
320 if point == target_point {
321 Some(point)
322 } else {
323 None
324 }
325 } else {
326 None
327 };
328
329 cx.dispatch_action(UpdateGoToDefinitionLink {
330 point,
331 cmd_held: cmd,
332 shift_held: shift,
333 });
334
335 let view = view.upgrade(cx.app).unwrap().read(cx.app);
336 if view.has_pending_selection() {
337 let mut scroll_delta = Vector2F::zero();
338
339 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
340 let top = text_bounds.origin_y() + vertical_margin;
341 let bottom = text_bounds.lower_left().y() - vertical_margin;
342 if position.y() < top {
343 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
344 }
345 if position.y() > bottom {
346 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
347 }
348
349 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
350 let left = text_bounds.origin_x() + horizontal_margin;
351 let right = text_bounds.upper_right().x() - horizontal_margin;
352 if position.x() < left {
353 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
354 left - position.x(),
355 ))
356 }
357 if position.x() > right {
358 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
359 position.x() - right,
360 ))
361 }
362
363 let (position, target_position) =
364 position_map.point_for_position(text_bounds, position);
365
366 cx.dispatch_action(Select(SelectPhase::Update {
367 position,
368 goal_column: target_position.column(),
369 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
370 .clamp(Vector2F::zero(), position_map.scroll_max),
371 }));
372
373 cx.dispatch_action(HoverAt { point });
374 true
375 } else {
376 cx.dispatch_action(HoverAt { point });
377 false
378 }
379 }
380
381 fn mouse_moved(
382 MouseMovedEvent {
383 cmd,
384 shift,
385 position,
386 ..
387 }: MouseMovedEvent,
388 position_map: &PositionMap,
389 text_bounds: RectF,
390 cx: &mut EventContext,
391 ) -> bool {
392 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
393 // Don't trigger hover popover if mouse is hovering over context menu
394 let point = if text_bounds.contains_point(position) {
395 let (point, target_point) = position_map.point_for_position(text_bounds, position);
396 if point == target_point {
397 Some(point)
398 } else {
399 None
400 }
401 } else {
402 None
403 };
404
405 cx.dispatch_action(UpdateGoToDefinitionLink {
406 point,
407 cmd_held: cmd,
408 shift_held: shift,
409 });
410
411 cx.dispatch_action(HoverAt { point });
412 true
413 }
414
415 fn modifiers_changed(&self, event: ModifiersChangedEvent, cx: &mut EventContext) -> bool {
416 cx.dispatch_action(CmdShiftChanged {
417 cmd_down: event.cmd,
418 shift_down: event.shift,
419 });
420 false
421 }
422
423 fn scroll(
424 position: Vector2F,
425 mut delta: Vector2F,
426 precise: bool,
427 position_map: &PositionMap,
428 bounds: RectF,
429 cx: &mut EventContext,
430 ) -> bool {
431 if !bounds.contains_point(position) {
432 return false;
433 }
434
435 let max_glyph_width = position_map.em_width;
436 if !precise {
437 delta *= vec2f(max_glyph_width, position_map.line_height);
438 }
439
440 let scroll_position = position_map.snapshot.scroll_position();
441 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
442 let y =
443 (scroll_position.y() * position_map.line_height - delta.y()) / position_map.line_height;
444 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
445
446 cx.dispatch_action(Scroll(scroll_position));
447
448 true
449 }
450
451 fn paint_background(
452 &self,
453 gutter_bounds: RectF,
454 text_bounds: RectF,
455 layout: &LayoutState,
456 cx: &mut PaintContext,
457 ) {
458 let bounds = gutter_bounds.union_rect(text_bounds);
459 let scroll_top =
460 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
461 cx.scene.push_quad(Quad {
462 bounds: gutter_bounds,
463 background: Some(self.style.gutter_background),
464 border: Border::new(0., Color::transparent_black()),
465 corner_radius: 0.,
466 });
467 cx.scene.push_quad(Quad {
468 bounds: text_bounds,
469 background: Some(self.style.background),
470 border: Border::new(0., Color::transparent_black()),
471 corner_radius: 0.,
472 });
473
474 if let EditorMode::Full = layout.mode {
475 let mut active_rows = layout.active_rows.iter().peekable();
476 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
477 let mut end_row = *start_row;
478 while active_rows.peek().map_or(false, |r| {
479 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
480 }) {
481 active_rows.next().unwrap();
482 end_row += 1;
483 }
484
485 if !contains_non_empty_selection {
486 let origin = vec2f(
487 bounds.origin_x(),
488 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
489 - scroll_top,
490 );
491 let size = vec2f(
492 bounds.width(),
493 layout.position_map.line_height * (end_row - start_row + 1) as f32,
494 );
495 cx.scene.push_quad(Quad {
496 bounds: RectF::new(origin, size),
497 background: Some(self.style.active_line_background),
498 border: Border::default(),
499 corner_radius: 0.,
500 });
501 }
502 }
503
504 if let Some(highlighted_rows) = &layout.highlighted_rows {
505 let origin = vec2f(
506 bounds.origin_x(),
507 bounds.origin_y()
508 + (layout.position_map.line_height * highlighted_rows.start as f32)
509 - scroll_top,
510 );
511 let size = vec2f(
512 bounds.width(),
513 layout.position_map.line_height * highlighted_rows.len() as f32,
514 );
515 cx.scene.push_quad(Quad {
516 bounds: RectF::new(origin, size),
517 background: Some(self.style.highlighted_line_background),
518 border: Border::default(),
519 corner_radius: 0.,
520 });
521 }
522 }
523 }
524
525 fn paint_gutter(
526 &mut self,
527 bounds: RectF,
528 visible_bounds: RectF,
529 layout: &mut LayoutState,
530 cx: &mut PaintContext,
531 ) {
532 let line_height = layout.position_map.line_height;
533
534 let scroll_position = layout.position_map.snapshot.scroll_position();
535 let scroll_top = scroll_position.y() * line_height;
536
537 let show_gutter = matches!(
538 &cx.global::<Settings>()
539 .git_overrides
540 .git_gutter
541 .unwrap_or_default(),
542 GitGutter::TrackedFiles
543 );
544
545 if show_gutter {
546 Self::paint_diff_hunks(bounds, layout, cx);
547 }
548
549 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
550 if let Some(line) = line {
551 let line_origin = bounds.origin()
552 + vec2f(
553 bounds.width() - line.width() - layout.gutter_padding,
554 ix as f32 * line_height - (scroll_top % line_height),
555 );
556
557 line.paint(line_origin, visible_bounds, line_height, cx);
558 }
559 }
560
561 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
562 let mut x = bounds.width() - layout.gutter_padding;
563 let mut y = *row as f32 * line_height - scroll_top;
564 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
565 y += (line_height - indicator.size().y()) / 2.;
566 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
567 }
568 }
569
570 fn paint_diff_hunks(bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
571 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
572 let line_height = layout.position_map.line_height;
573
574 let scroll_position = layout.position_map.snapshot.scroll_position();
575 let scroll_top = scroll_position.y() * line_height;
576
577 for hunk in &layout.hunk_layouts {
578 let color = match (hunk.status, hunk.is_folded) {
579 (DiffHunkStatus::Added, false) => diff_style.inserted,
580 (DiffHunkStatus::Modified, false) => diff_style.modified,
581
582 //TODO: This rendering is entirely a horrible hack
583 (DiffHunkStatus::Removed, false) => {
584 let row = hunk.visual_range.start;
585
586 let offset = line_height / 2.;
587 let start_y = row as f32 * line_height - offset - scroll_top;
588 let end_y = start_y + line_height;
589
590 let width = diff_style.removed_width_em * line_height;
591 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
592 let highlight_size = vec2f(width * 2., end_y - start_y);
593 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
594
595 cx.scene.push_quad(Quad {
596 bounds: highlight_bounds,
597 background: Some(diff_style.deleted),
598 border: Border::new(0., Color::transparent_black()),
599 corner_radius: 1. * line_height,
600 });
601
602 continue;
603 }
604
605 (_, true) => {
606 let row = hunk.visual_range.start;
607 let start_y = row as f32 * line_height - scroll_top;
608 let end_y = start_y + line_height;
609
610 let width = diff_style.removed_width_em * line_height;
611 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
612 let highlight_size = vec2f(width * 2., end_y - start_y);
613 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
614
615 cx.scene.push_quad(Quad {
616 bounds: highlight_bounds,
617 background: Some(diff_style.modified),
618 border: Border::new(0., Color::transparent_black()),
619 corner_radius: 1. * line_height,
620 });
621
622 continue;
623 }
624 };
625
626 let start_row = hunk.visual_range.start;
627 let end_row = hunk.visual_range.end;
628
629 let start_y = start_row as f32 * line_height - scroll_top;
630 let end_y = end_row as f32 * line_height - scroll_top;
631
632 let width = diff_style.width_em * line_height;
633 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
634 let highlight_size = vec2f(width * 2., end_y - start_y);
635 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
636
637 cx.scene.push_quad(Quad {
638 bounds: highlight_bounds,
639 background: Some(color),
640 border: Border::new(0., Color::transparent_black()),
641 corner_radius: diff_style.corner_radius * line_height,
642 });
643 }
644 }
645
646 fn paint_text(
647 &mut self,
648 bounds: RectF,
649 visible_bounds: RectF,
650 layout: &mut LayoutState,
651 cx: &mut PaintContext,
652 ) {
653 let view = self.view(cx.app);
654 let style = &self.style;
655 let local_replica_id = view.replica_id(cx);
656 let scroll_position = layout.position_map.snapshot.scroll_position();
657 let start_row = layout.visible_display_row_range.start;
658 let scroll_top = scroll_position.y() * layout.position_map.line_height;
659 let max_glyph_width = layout.position_map.em_width;
660 let scroll_left = scroll_position.x() * max_glyph_width;
661 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
662
663 cx.scene.push_layer(Some(bounds));
664
665 cx.scene.push_cursor_region(CursorRegion {
666 bounds,
667 style: if !view.link_go_to_definition_state.definitions.is_empty() {
668 CursorStyle::PointingHand
669 } else {
670 CursorStyle::IBeam
671 },
672 });
673
674 for (range, color) in &layout.highlighted_ranges {
675 self.paint_highlighted_range(
676 range.clone(),
677 *color,
678 0.,
679 0.15 * layout.position_map.line_height,
680 layout,
681 content_origin,
682 scroll_top,
683 scroll_left,
684 bounds,
685 cx,
686 );
687 }
688
689 let mut cursors = SmallVec::<[Cursor; 32]>::new();
690 for (replica_id, selections) in &layout.selections {
691 let selection_style = style.replica_selection_style(*replica_id);
692 let corner_radius = 0.15 * layout.position_map.line_height;
693
694 for selection in selections {
695 self.paint_highlighted_range(
696 selection.range.clone(),
697 selection_style.selection,
698 corner_radius,
699 corner_radius * 2.,
700 layout,
701 content_origin,
702 scroll_top,
703 scroll_left,
704 bounds,
705 cx,
706 );
707
708 if view.show_local_cursors(cx) || *replica_id != local_replica_id {
709 let cursor_position = selection.head;
710 if layout
711 .visible_display_row_range
712 .contains(&cursor_position.row())
713 {
714 let cursor_row_layout = &layout.position_map.line_layouts
715 [(cursor_position.row() - start_row) as usize];
716 let cursor_column = cursor_position.column() as usize;
717
718 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
719 let mut block_width =
720 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
721 if block_width == 0.0 {
722 block_width = layout.position_map.em_width;
723 }
724 let block_text = if let CursorShape::Block = selection.cursor_shape {
725 layout
726 .position_map
727 .snapshot
728 .chars_at(cursor_position)
729 .next()
730 .and_then(|(character, _)| {
731 let font_id =
732 cursor_row_layout.font_for_index(cursor_column)?;
733 let text = character.to_string();
734
735 Some(cx.text_layout_cache.layout_str(
736 &text,
737 cursor_row_layout.font_size(),
738 &[(
739 text.len(),
740 RunStyle {
741 font_id,
742 color: style.background,
743 underline: Default::default(),
744 },
745 )],
746 ))
747 })
748 } else {
749 None
750 };
751
752 let x = cursor_character_x - scroll_left;
753 let y = cursor_position.row() as f32 * layout.position_map.line_height
754 - scroll_top;
755 cursors.push(Cursor {
756 color: selection_style.cursor,
757 block_width,
758 origin: vec2f(x, y),
759 line_height: layout.position_map.line_height,
760 shape: selection.cursor_shape,
761 block_text,
762 });
763 }
764 }
765 }
766 }
767
768 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
769 // Draw glyphs
770 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
771 let row = start_row + ix as u32;
772 line.paint(
773 content_origin
774 + vec2f(
775 -scroll_left,
776 row as f32 * layout.position_map.line_height - scroll_top,
777 ),
778 visible_text_bounds,
779 layout.position_map.line_height,
780 cx,
781 );
782 }
783 }
784
785 cx.scene.push_layer(Some(bounds));
786 for cursor in cursors {
787 cursor.paint(content_origin, cx);
788 }
789 cx.scene.pop_layer();
790
791 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
792 cx.scene.push_stacking_context(None);
793 let cursor_row_layout =
794 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
795 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
796 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
797 let mut list_origin = content_origin + vec2f(x, y);
798 let list_width = context_menu.size().x();
799 let list_height = context_menu.size().y();
800
801 // Snap the right edge of the list to the right edge of the window if
802 // its horizontal bounds overflow.
803 if list_origin.x() + list_width > cx.window_size.x() {
804 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
805 }
806
807 if list_origin.y() + list_height > bounds.max_y() {
808 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
809 }
810
811 context_menu.paint(
812 list_origin,
813 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
814 cx,
815 );
816
817 cx.scene.pop_stacking_context();
818 }
819
820 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
821 cx.scene.push_stacking_context(None);
822
823 // This is safe because we check on layout whether the required row is available
824 let hovered_row_layout =
825 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
826
827 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
828 // height. This is the size we will use to decide whether to render popovers above or below
829 // the hovered line.
830 let first_size = hover_popovers[0].size();
831 let height_to_reserve = first_size.y()
832 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
833
834 // Compute Hovered Point
835 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
836 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
837 let hovered_point = content_origin + vec2f(x, y);
838
839 if hovered_point.y() - height_to_reserve > 0.0 {
840 // There is enough space above. Render popovers above the hovered point
841 let mut current_y = hovered_point.y();
842 for hover_popover in hover_popovers {
843 let size = hover_popover.size();
844 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
845
846 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
847 if x_out_of_bounds < 0.0 {
848 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
849 }
850
851 hover_popover.paint(
852 popover_origin,
853 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
854 cx,
855 );
856
857 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
858 }
859 } else {
860 // There is not enough space above. Render popovers below the hovered point
861 let mut current_y = hovered_point.y() + layout.position_map.line_height;
862 for hover_popover in hover_popovers {
863 let size = hover_popover.size();
864 let mut popover_origin = vec2f(hovered_point.x(), current_y);
865
866 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
867 if x_out_of_bounds < 0.0 {
868 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
869 }
870
871 hover_popover.paint(
872 popover_origin,
873 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
874 cx,
875 );
876
877 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
878 }
879 }
880
881 cx.scene.pop_stacking_context();
882 }
883
884 cx.scene.pop_layer();
885 }
886
887 fn paint_scrollbar(&mut self, bounds: RectF, layout: &mut LayoutState, cx: &mut PaintContext) {
888 enum ScrollbarMouseHandlers {}
889 if layout.mode != EditorMode::Full {
890 return;
891 }
892
893 let view = self.view.clone();
894 let style = &self.style.theme.scrollbar;
895
896 let top = bounds.min_y();
897 let bottom = bounds.max_y();
898 let right = bounds.max_x();
899 let left = right - style.width;
900 let row_range = &layout.scrollbar_row_range;
901 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
902
903 let mut height = bounds.height();
904 let mut first_row_y_offset = 0.0;
905
906 // Impose a minimum height on the scrollbar thumb
907 let min_thumb_height =
908 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
909 let thumb_height = (row_range.end - row_range.start) * height / max_row;
910 if thumb_height < min_thumb_height {
911 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
912 height -= min_thumb_height - thumb_height;
913 }
914
915 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * height / max_row };
916
917 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
918 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
919 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
920 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
921
922 if layout.show_scrollbars {
923 cx.scene.push_quad(Quad {
924 bounds: track_bounds,
925 border: style.track.border,
926 background: style.track.background_color,
927 ..Default::default()
928 });
929 cx.scene.push_quad(Quad {
930 bounds: thumb_bounds,
931 border: style.thumb.border,
932 background: style.thumb.background_color,
933 corner_radius: style.thumb.corner_radius,
934 });
935 }
936
937 cx.scene.push_cursor_region(CursorRegion {
938 bounds: track_bounds,
939 style: CursorStyle::Arrow,
940 });
941 cx.scene.push_mouse_region(
942 MouseRegion::new::<ScrollbarMouseHandlers>(view.id(), view.id(), track_bounds)
943 .on_move({
944 let view = view.clone();
945 move |_, cx| {
946 if let Some(view) = view.upgrade(cx.deref_mut()) {
947 view.update(cx.deref_mut(), |view, cx| {
948 view.make_scrollbar_visible(cx);
949 });
950 }
951 }
952 })
953 .on_down(MouseButton::Left, {
954 let view = view.clone();
955 let row_range = row_range.clone();
956 move |e, cx| {
957 let y = e.position.y();
958 if let Some(view) = view.upgrade(cx.deref_mut()) {
959 view.update(cx.deref_mut(), |view, cx| {
960 if y < thumb_top || thumb_bottom < y {
961 let center_row =
962 ((y - top) * max_row as f32 / height).round() as u32;
963 let top_row = center_row.saturating_sub(
964 (row_range.end - row_range.start) as u32 / 2,
965 );
966 let mut position = view.scroll_position(cx);
967 position.set_y(top_row as f32);
968 view.set_scroll_position(position, cx);
969 } else {
970 view.make_scrollbar_visible(cx);
971 }
972 });
973 }
974 }
975 })
976 .on_drag(MouseButton::Left, {
977 let view = view.clone();
978 move |e, cx| {
979 let y = e.prev_mouse_position.y();
980 let new_y = e.position.y();
981 if thumb_top < y && y < thumb_bottom {
982 if let Some(view) = view.upgrade(cx.deref_mut()) {
983 view.update(cx.deref_mut(), |view, cx| {
984 let mut position = view.scroll_position(cx);
985 position.set_y(
986 position.y() + (new_y - y) * (max_row as f32) / height,
987 );
988 if position.y() < 0.0 {
989 position.set_y(0.);
990 }
991 view.set_scroll_position(position, cx);
992 });
993 }
994 }
995 }
996 }),
997 );
998 }
999
1000 #[allow(clippy::too_many_arguments)]
1001 fn paint_highlighted_range(
1002 &self,
1003 range: Range<DisplayPoint>,
1004 color: Color,
1005 corner_radius: f32,
1006 line_end_overshoot: f32,
1007 layout: &LayoutState,
1008 content_origin: Vector2F,
1009 scroll_top: f32,
1010 scroll_left: f32,
1011 bounds: RectF,
1012 cx: &mut PaintContext,
1013 ) {
1014 let start_row = layout.visible_display_row_range.start;
1015 let end_row = layout.visible_display_row_range.end;
1016 if range.start != range.end {
1017 let row_range = if range.end.column() == 0 {
1018 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1019 } else {
1020 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1021 };
1022
1023 let highlighted_range = HighlightedRange {
1024 color,
1025 line_height: layout.position_map.line_height,
1026 corner_radius,
1027 start_y: content_origin.y()
1028 + row_range.start as f32 * layout.position_map.line_height
1029 - scroll_top,
1030 lines: row_range
1031 .into_iter()
1032 .map(|row| {
1033 let line_layout =
1034 &layout.position_map.line_layouts[(row - start_row) as usize];
1035 HighlightedRangeLine {
1036 start_x: if row == range.start.row() {
1037 content_origin.x()
1038 + line_layout.x_for_index(range.start.column() as usize)
1039 - scroll_left
1040 } else {
1041 content_origin.x() - scroll_left
1042 },
1043 end_x: if row == range.end.row() {
1044 content_origin.x()
1045 + line_layout.x_for_index(range.end.column() as usize)
1046 - scroll_left
1047 } else {
1048 content_origin.x() + line_layout.width() + line_end_overshoot
1049 - scroll_left
1050 },
1051 }
1052 })
1053 .collect(),
1054 };
1055
1056 highlighted_range.paint(bounds, cx.scene);
1057 }
1058 }
1059
1060 fn paint_blocks(
1061 &mut self,
1062 bounds: RectF,
1063 visible_bounds: RectF,
1064 layout: &mut LayoutState,
1065 cx: &mut PaintContext,
1066 ) {
1067 let scroll_position = layout.position_map.snapshot.scroll_position();
1068 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1069 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1070
1071 for block in &mut layout.blocks {
1072 let mut origin = bounds.origin()
1073 + vec2f(
1074 0.,
1075 block.row as f32 * layout.position_map.line_height - scroll_top,
1076 );
1077 if !matches!(block.style, BlockStyle::Sticky) {
1078 origin += vec2f(-scroll_left, 0.);
1079 }
1080 block.element.paint(origin, visible_bounds, cx);
1081 }
1082 }
1083
1084 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1085 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1086 let style = &self.style;
1087
1088 cx.text_layout_cache
1089 .layout_str(
1090 "1".repeat(digit_count).as_str(),
1091 style.text.font_size,
1092 &[(
1093 digit_count,
1094 RunStyle {
1095 font_id: style.text.font_id,
1096 color: Color::black(),
1097 underline: Default::default(),
1098 },
1099 )],
1100 )
1101 .width()
1102 }
1103
1104 //Folds contained in a hunk are ignored apart from shrinking visual size
1105 //If a fold contains any hunks then that fold line is marked as modified
1106 fn layout_git_gutters(
1107 &self,
1108 rows: Range<u32>,
1109 snapshot: &EditorSnapshot,
1110 ) -> Vec<DiffHunkLayout> {
1111 let buffer_snapshot = &snapshot.buffer_snapshot;
1112 let visual_start = DisplayPoint::new(rows.start, 0).to_point(snapshot).row;
1113 let visual_end = DisplayPoint::new(rows.end, 0).to_point(snapshot).row;
1114 let hunks = buffer_snapshot.git_diff_hunks_in_range(visual_start..visual_end);
1115
1116 let mut layouts = Vec::<DiffHunkLayout>::new();
1117
1118 for hunk in hunks {
1119 let hunk_start_point = Point::new(hunk.buffer_range.start, 0);
1120 let hunk_end_point = Point::new(hunk.buffer_range.end, 0);
1121 let hunk_start_point_sub = Point::new(hunk.buffer_range.start.saturating_sub(1), 0);
1122 let hunk_end_point_sub = Point::new(
1123 hunk.buffer_range
1124 .end
1125 .saturating_sub(1)
1126 .max(hunk.buffer_range.start),
1127 0,
1128 );
1129
1130 let is_removal = hunk.status() == DiffHunkStatus::Removed;
1131
1132 let folds_start = Point::new(hunk.buffer_range.start.saturating_sub(1), 0);
1133 let folds_end = Point::new(hunk.buffer_range.end + 1, 0);
1134 let folds_range = folds_start..folds_end;
1135
1136 let containing_fold = snapshot.folds_in_range(folds_range).find(|fold_range| {
1137 let fold_point_range = fold_range.to_point(buffer_snapshot);
1138 let fold_point_range = fold_point_range.start..=fold_point_range.end;
1139
1140 let folded_start = fold_point_range.contains(&hunk_start_point);
1141 let folded_end = fold_point_range.contains(&hunk_end_point_sub);
1142 let folded_start_sub = fold_point_range.contains(&hunk_start_point_sub);
1143
1144 (folded_start && folded_end) || (is_removal && folded_start_sub)
1145 });
1146
1147 let visual_range = if let Some(fold) = containing_fold {
1148 let row = fold.start.to_display_point(snapshot).row();
1149 row..row
1150 } else {
1151 let start = hunk_start_point.to_display_point(snapshot).row();
1152 let end = hunk_end_point.to_display_point(snapshot).row();
1153 start..end
1154 };
1155
1156 let has_existing_layout = match layouts.last() {
1157 Some(e) => visual_range == e.visual_range && e.status == hunk.status(),
1158 None => false,
1159 };
1160
1161 if !has_existing_layout {
1162 layouts.push(DiffHunkLayout {
1163 visual_range,
1164 status: hunk.status(),
1165 is_folded: containing_fold.is_some(),
1166 });
1167 }
1168 }
1169
1170 layouts
1171 }
1172
1173 fn layout_line_numbers(
1174 &self,
1175 rows: Range<u32>,
1176 active_rows: &BTreeMap<u32, bool>,
1177 snapshot: &EditorSnapshot,
1178 cx: &LayoutContext,
1179 ) -> Vec<Option<text_layout::Line>> {
1180 let style = &self.style;
1181 let include_line_numbers = snapshot.mode == EditorMode::Full;
1182 let mut line_number_layouts = Vec::with_capacity(rows.len());
1183 let mut line_number = String::new();
1184 for (ix, row) in snapshot
1185 .buffer_rows(rows.start)
1186 .take((rows.end - rows.start) as usize)
1187 .enumerate()
1188 {
1189 let display_row = rows.start + ix as u32;
1190 let color = if active_rows.contains_key(&display_row) {
1191 style.line_number_active
1192 } else {
1193 style.line_number
1194 };
1195 if let Some(buffer_row) = row {
1196 if include_line_numbers {
1197 line_number.clear();
1198 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1199 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1200 &line_number,
1201 style.text.font_size,
1202 &[(
1203 line_number.len(),
1204 RunStyle {
1205 font_id: style.text.font_id,
1206 color,
1207 underline: Default::default(),
1208 },
1209 )],
1210 )));
1211 }
1212 } else {
1213 line_number_layouts.push(None);
1214 }
1215 }
1216
1217 line_number_layouts
1218 }
1219
1220 fn layout_lines(
1221 &mut self,
1222 rows: Range<u32>,
1223 snapshot: &EditorSnapshot,
1224 cx: &LayoutContext,
1225 ) -> Vec<text_layout::Line> {
1226 if rows.start >= rows.end {
1227 return Vec::new();
1228 }
1229
1230 // When the editor is empty and unfocused, then show the placeholder.
1231 if snapshot.is_empty() && !snapshot.is_focused() {
1232 let placeholder_style = self
1233 .style
1234 .placeholder_text
1235 .as_ref()
1236 .unwrap_or(&self.style.text);
1237 let placeholder_text = snapshot.placeholder_text();
1238 let placeholder_lines = placeholder_text
1239 .as_ref()
1240 .map_or("", AsRef::as_ref)
1241 .split('\n')
1242 .skip(rows.start as usize)
1243 .chain(iter::repeat(""))
1244 .take(rows.len());
1245 placeholder_lines
1246 .map(|line| {
1247 cx.text_layout_cache.layout_str(
1248 line,
1249 placeholder_style.font_size,
1250 &[(
1251 line.len(),
1252 RunStyle {
1253 font_id: placeholder_style.font_id,
1254 color: placeholder_style.color,
1255 underline: Default::default(),
1256 },
1257 )],
1258 )
1259 })
1260 .collect()
1261 } else {
1262 let style = &self.style;
1263 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1264 let mut highlight_style = chunk
1265 .syntax_highlight_id
1266 .and_then(|id| id.style(&style.syntax));
1267
1268 if let Some(chunk_highlight) = chunk.highlight_style {
1269 if let Some(highlight_style) = highlight_style.as_mut() {
1270 highlight_style.highlight(chunk_highlight);
1271 } else {
1272 highlight_style = Some(chunk_highlight);
1273 }
1274 }
1275
1276 let mut diagnostic_highlight = HighlightStyle::default();
1277
1278 if chunk.is_unnecessary {
1279 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1280 }
1281
1282 if let Some(severity) = chunk.diagnostic_severity {
1283 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1284 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1285 let diagnostic_style = super::diagnostic_style(severity, true, style);
1286 diagnostic_highlight.underline = Some(Underline {
1287 color: Some(diagnostic_style.message.text.color),
1288 thickness: 1.0.into(),
1289 squiggly: true,
1290 });
1291 }
1292 }
1293
1294 if let Some(highlight_style) = highlight_style.as_mut() {
1295 highlight_style.highlight(diagnostic_highlight);
1296 } else {
1297 highlight_style = Some(diagnostic_highlight);
1298 }
1299
1300 (chunk.text, highlight_style)
1301 });
1302 layout_highlighted_chunks(
1303 chunks,
1304 &style.text,
1305 cx.text_layout_cache,
1306 cx.font_cache,
1307 MAX_LINE_LEN,
1308 rows.len() as usize,
1309 )
1310 }
1311 }
1312
1313 #[allow(clippy::too_many_arguments)]
1314 fn layout_blocks(
1315 &mut self,
1316 rows: Range<u32>,
1317 snapshot: &EditorSnapshot,
1318 editor_width: f32,
1319 scroll_width: f32,
1320 gutter_padding: f32,
1321 gutter_width: f32,
1322 em_width: f32,
1323 text_x: f32,
1324 line_height: f32,
1325 style: &EditorStyle,
1326 line_layouts: &[text_layout::Line],
1327 cx: &mut LayoutContext,
1328 ) -> (f32, Vec<BlockLayout>) {
1329 let editor = if let Some(editor) = self.view.upgrade(cx) {
1330 editor
1331 } else {
1332 return Default::default();
1333 };
1334
1335 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1336 let scroll_x = snapshot.scroll_position.x();
1337 let (fixed_blocks, non_fixed_blocks) = snapshot
1338 .blocks_in_range(rows.clone())
1339 .partition::<Vec<_>, _>(|(_, block)| match block {
1340 TransformBlock::ExcerptHeader { .. } => false,
1341 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1342 });
1343 let mut render_block = |block: &TransformBlock, width: f32| {
1344 let mut element = match block {
1345 TransformBlock::Custom(block) => {
1346 let align_to = block
1347 .position()
1348 .to_point(&snapshot.buffer_snapshot)
1349 .to_display_point(snapshot);
1350 let anchor_x = text_x
1351 + if rows.contains(&align_to.row()) {
1352 line_layouts[(align_to.row() - rows.start) as usize]
1353 .x_for_index(align_to.column() as usize)
1354 } else {
1355 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1356 .x_for_index(align_to.column() as usize)
1357 };
1358
1359 cx.render(&editor, |_, cx| {
1360 block.render(&mut BlockContext {
1361 cx,
1362 anchor_x,
1363 gutter_padding,
1364 line_height,
1365 scroll_x,
1366 gutter_width,
1367 em_width,
1368 })
1369 })
1370 }
1371 TransformBlock::ExcerptHeader {
1372 key,
1373 buffer,
1374 range,
1375 starts_new_buffer,
1376 ..
1377 } => {
1378 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1379 let jump_position = range
1380 .primary
1381 .as_ref()
1382 .map_or(range.context.start, |primary| primary.start);
1383 let jump_action = crate::Jump {
1384 path: ProjectPath {
1385 worktree_id: file.worktree_id(cx),
1386 path: file.path.clone(),
1387 },
1388 position: language::ToPoint::to_point(&jump_position, buffer),
1389 anchor: jump_position,
1390 };
1391
1392 enum JumpIcon {}
1393 cx.render(&editor, |_, cx| {
1394 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1395 let style = style.jump_icon.style_for(state, false);
1396 Svg::new("icons/arrow_up_right_8.svg")
1397 .with_color(style.color)
1398 .constrained()
1399 .with_width(style.icon_width)
1400 .aligned()
1401 .contained()
1402 .with_style(style.container)
1403 .constrained()
1404 .with_width(style.button_width)
1405 .with_height(style.button_width)
1406 .boxed()
1407 })
1408 .with_cursor_style(CursorStyle::PointingHand)
1409 .on_click(MouseButton::Left, move |_, cx| {
1410 cx.dispatch_action(jump_action.clone())
1411 })
1412 .with_tooltip::<JumpIcon, _>(
1413 *key,
1414 "Jump to Buffer".to_string(),
1415 Some(Box::new(crate::OpenExcerpts)),
1416 tooltip_style.clone(),
1417 cx,
1418 )
1419 .aligned()
1420 .flex_float()
1421 .boxed()
1422 })
1423 });
1424
1425 if *starts_new_buffer {
1426 let style = &self.style.diagnostic_path_header;
1427 let font_size =
1428 (style.text_scale_factor * self.style.text.font_size).round();
1429
1430 let mut filename = None;
1431 let mut parent_path = None;
1432 if let Some(file) = buffer.file() {
1433 let path = file.path();
1434 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1435 parent_path =
1436 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1437 }
1438
1439 Flex::row()
1440 .with_child(
1441 Label::new(
1442 filename.unwrap_or_else(|| "untitled".to_string()),
1443 style.filename.text.clone().with_font_size(font_size),
1444 )
1445 .contained()
1446 .with_style(style.filename.container)
1447 .aligned()
1448 .boxed(),
1449 )
1450 .with_children(parent_path.map(|path| {
1451 Label::new(path, style.path.text.clone().with_font_size(font_size))
1452 .contained()
1453 .with_style(style.path.container)
1454 .aligned()
1455 .boxed()
1456 }))
1457 .with_children(jump_icon)
1458 .contained()
1459 .with_style(style.container)
1460 .with_padding_left(gutter_padding)
1461 .with_padding_right(gutter_padding)
1462 .expanded()
1463 .named("path header block")
1464 } else {
1465 let text_style = self.style.text.clone();
1466 Flex::row()
1467 .with_child(Label::new("…".to_string(), text_style).boxed())
1468 .with_children(jump_icon)
1469 .contained()
1470 .with_padding_left(gutter_padding)
1471 .with_padding_right(gutter_padding)
1472 .expanded()
1473 .named("collapsed context")
1474 }
1475 }
1476 };
1477
1478 element.layout(
1479 SizeConstraint {
1480 min: Vector2F::zero(),
1481 max: vec2f(width, block.height() as f32 * line_height),
1482 },
1483 cx,
1484 );
1485 element
1486 };
1487
1488 let mut fixed_block_max_width = 0f32;
1489 let mut blocks = Vec::new();
1490 for (row, block) in fixed_blocks {
1491 let element = render_block(block, f32::INFINITY);
1492 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1493 blocks.push(BlockLayout {
1494 row,
1495 element,
1496 style: BlockStyle::Fixed,
1497 });
1498 }
1499 for (row, block) in non_fixed_blocks {
1500 let style = match block {
1501 TransformBlock::Custom(block) => block.style(),
1502 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1503 };
1504 let width = match style {
1505 BlockStyle::Sticky => editor_width,
1506 BlockStyle::Flex => editor_width
1507 .max(fixed_block_max_width)
1508 .max(gutter_width + scroll_width),
1509 BlockStyle::Fixed => unreachable!(),
1510 };
1511 let element = render_block(block, width);
1512 blocks.push(BlockLayout {
1513 row,
1514 element,
1515 style,
1516 });
1517 }
1518 (
1519 scroll_width.max(fixed_block_max_width - gutter_width),
1520 blocks,
1521 )
1522 }
1523}
1524
1525impl Element for EditorElement {
1526 type LayoutState = LayoutState;
1527 type PaintState = ();
1528
1529 fn layout(
1530 &mut self,
1531 constraint: SizeConstraint,
1532 cx: &mut LayoutContext,
1533 ) -> (Vector2F, Self::LayoutState) {
1534 let mut size = constraint.max;
1535 if size.x().is_infinite() {
1536 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1537 }
1538
1539 let snapshot = self.snapshot(cx.app);
1540 let style = self.style.clone();
1541 let line_height = style.text.line_height(cx.font_cache);
1542
1543 let gutter_padding;
1544 let gutter_width;
1545 let gutter_margin;
1546 if snapshot.mode == EditorMode::Full {
1547 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1548 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1549 gutter_margin = -style.text.descent(cx.font_cache);
1550 } else {
1551 gutter_padding = 0.0;
1552 gutter_width = 0.0;
1553 gutter_margin = 0.0;
1554 };
1555
1556 let text_width = size.x() - gutter_width;
1557 let em_width = style.text.em_width(cx.font_cache);
1558 let em_advance = style.text.em_advance(cx.font_cache);
1559 let overscroll = vec2f(em_width, 0.);
1560 let snapshot = self.update_view(cx.app, |view, cx| {
1561 view.set_visible_line_count(size.y() / line_height);
1562
1563 let wrap_width = match view.soft_wrap_mode(cx) {
1564 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1565 SoftWrap::EditorWidth => {
1566 Some(text_width - gutter_margin - overscroll.x() - em_width)
1567 }
1568 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1569 };
1570
1571 if view.set_wrap_width(wrap_width, cx) {
1572 view.snapshot(cx)
1573 } else {
1574 snapshot
1575 }
1576 });
1577
1578 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1579 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1580 size.set_y(
1581 scroll_height
1582 .min(constraint.max_along(Axis::Vertical))
1583 .max(constraint.min_along(Axis::Vertical))
1584 .min(line_height * max_lines as f32),
1585 )
1586 } else if let EditorMode::SingleLine = snapshot.mode {
1587 size.set_y(
1588 line_height
1589 .min(constraint.max_along(Axis::Vertical))
1590 .max(constraint.min_along(Axis::Vertical)),
1591 )
1592 } else if size.y().is_infinite() {
1593 size.set_y(scroll_height);
1594 }
1595 let gutter_size = vec2f(gutter_width, size.y());
1596 let text_size = vec2f(text_width, size.y());
1597
1598 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1599 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1600 let snapshot = view.snapshot(cx);
1601 (autoscroll_horizontally, snapshot)
1602 });
1603
1604 let scroll_position = snapshot.scroll_position();
1605 // The scroll position is a fractional point, the whole number of which represents
1606 // the top of the window in terms of display rows.
1607 let start_row = scroll_position.y() as u32;
1608 let height_in_lines = size.y() / line_height;
1609 let max_row = snapshot.max_point().row();
1610
1611 // Add 1 to ensure selections bleed off screen
1612 let end_row = 1 + cmp::min(
1613 (scroll_position.y() + height_in_lines).ceil() as u32,
1614 max_row,
1615 );
1616
1617 let start_anchor = if start_row == 0 {
1618 Anchor::min()
1619 } else {
1620 snapshot
1621 .buffer_snapshot
1622 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1623 };
1624 let end_anchor = if end_row > max_row {
1625 Anchor::max()
1626 } else {
1627 snapshot
1628 .buffer_snapshot
1629 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1630 };
1631
1632 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1633 let mut active_rows = BTreeMap::new();
1634 let mut highlighted_rows = None;
1635 let mut highlighted_ranges = Vec::new();
1636 let mut show_scrollbars = false;
1637 self.update_view(cx.app, |view, cx| {
1638 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1639
1640 highlighted_rows = view.highlighted_rows();
1641 let theme = cx.global::<Settings>().theme.as_ref();
1642 highlighted_ranges = view.background_highlights_in_range(
1643 start_anchor.clone()..end_anchor.clone(),
1644 &display_map,
1645 theme,
1646 );
1647
1648 let mut remote_selections = HashMap::default();
1649 for (replica_id, line_mode, cursor_shape, selection) in display_map
1650 .buffer_snapshot
1651 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1652 {
1653 // The local selections match the leader's selections.
1654 if Some(replica_id) == view.leader_replica_id {
1655 continue;
1656 }
1657 remote_selections
1658 .entry(replica_id)
1659 .or_insert(Vec::new())
1660 .push(SelectionLayout::new(
1661 selection,
1662 line_mode,
1663 cursor_shape,
1664 &display_map,
1665 ));
1666 }
1667 selections.extend(remote_selections);
1668
1669 if view.show_local_selections {
1670 let mut local_selections = view
1671 .selections
1672 .disjoint_in_range(start_anchor..end_anchor, cx);
1673 local_selections.extend(view.selections.pending(cx));
1674 for selection in &local_selections {
1675 let is_empty = selection.start == selection.end;
1676 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1677 let selection_end = snapshot.next_line_boundary(selection.end).1;
1678 for row in cmp::max(selection_start.row(), start_row)
1679 ..=cmp::min(selection_end.row(), end_row)
1680 {
1681 let contains_non_empty_selection =
1682 active_rows.entry(row).or_insert(!is_empty);
1683 *contains_non_empty_selection |= !is_empty;
1684 }
1685 }
1686
1687 // Render the local selections in the leader's color when following.
1688 let local_replica_id = view
1689 .leader_replica_id
1690 .unwrap_or_else(|| view.replica_id(cx));
1691
1692 selections.push((
1693 local_replica_id,
1694 local_selections
1695 .into_iter()
1696 .map(|selection| {
1697 SelectionLayout::new(
1698 selection,
1699 view.selections.line_mode,
1700 view.cursor_shape,
1701 &display_map,
1702 )
1703 })
1704 .collect(),
1705 ));
1706 }
1707
1708 show_scrollbars = view.show_scrollbars();
1709 });
1710
1711 let line_number_layouts =
1712 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1713
1714 let hunk_layouts = self.layout_git_gutters(start_row..end_row, &snapshot);
1715
1716 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
1717
1718 let mut max_visible_line_width = 0.0;
1719 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1720 for line in &line_layouts {
1721 if line.width() > max_visible_line_width {
1722 max_visible_line_width = line.width();
1723 }
1724 }
1725
1726 let style = self.style.clone();
1727 let longest_line_width = layout_line(
1728 snapshot.longest_row(),
1729 &snapshot,
1730 &style,
1731 cx.text_layout_cache,
1732 )
1733 .width();
1734 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1735 let em_width = style.text.em_width(cx.font_cache);
1736 let (scroll_width, blocks) = self.layout_blocks(
1737 start_row..end_row,
1738 &snapshot,
1739 size.x(),
1740 scroll_width,
1741 gutter_padding,
1742 gutter_width,
1743 em_width,
1744 gutter_width + gutter_margin,
1745 line_height,
1746 &style,
1747 &line_layouts,
1748 cx,
1749 );
1750
1751 let scroll_max = vec2f(
1752 ((scroll_width - text_size.x()) / em_width).max(0.0),
1753 max_row as f32,
1754 );
1755
1756 self.update_view(cx.app, |view, cx| {
1757 let clamped = view.clamp_scroll_left(scroll_max.x());
1758
1759 let autoscrolled = if autoscroll_horizontally {
1760 view.autoscroll_horizontally(
1761 start_row,
1762 text_size.x(),
1763 scroll_width,
1764 em_width,
1765 &line_layouts,
1766 cx,
1767 )
1768 } else {
1769 false
1770 };
1771
1772 if clamped || autoscrolled {
1773 snapshot = view.snapshot(cx);
1774 }
1775 });
1776
1777 let mut context_menu = None;
1778 let mut code_actions_indicator = None;
1779 let mut hover = None;
1780 let mut mode = EditorMode::Full;
1781 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1782 let newest_selection_head = view
1783 .selections
1784 .newest::<usize>(cx)
1785 .head()
1786 .to_display_point(&snapshot);
1787
1788 let style = view.style(cx);
1789 if (start_row..end_row).contains(&newest_selection_head.row()) {
1790 if view.context_menu_visible() {
1791 context_menu =
1792 view.render_context_menu(newest_selection_head, style.clone(), cx);
1793 }
1794
1795 code_actions_indicator = view
1796 .render_code_actions_indicator(&style, cx)
1797 .map(|indicator| (newest_selection_head.row(), indicator));
1798 }
1799
1800 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1801 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1802 mode = view.mode;
1803 });
1804
1805 if let Some((_, context_menu)) = context_menu.as_mut() {
1806 context_menu.layout(
1807 SizeConstraint {
1808 min: Vector2F::zero(),
1809 max: vec2f(
1810 cx.window_size.x() * 0.7,
1811 (12. * line_height).min((size.y() - line_height) / 2.),
1812 ),
1813 },
1814 cx,
1815 );
1816 }
1817
1818 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1819 indicator.layout(
1820 SizeConstraint::strict_along(
1821 Axis::Vertical,
1822 line_height * style.code_actions.vertical_scale,
1823 ),
1824 cx,
1825 );
1826 }
1827
1828 if let Some((_, hover_popovers)) = hover.as_mut() {
1829 for hover_popover in hover_popovers.iter_mut() {
1830 hover_popover.layout(
1831 SizeConstraint {
1832 min: Vector2F::zero(),
1833 max: vec2f(
1834 (120. * em_width) // Default size
1835 .min(size.x() / 2.) // Shrink to half of the editor width
1836 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1837 (16. * line_height) // Default size
1838 .min(size.y() / 2.) // Shrink to half of the editor height
1839 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1840 ),
1841 },
1842 cx,
1843 );
1844 }
1845 }
1846
1847 (
1848 size,
1849 LayoutState {
1850 mode,
1851 position_map: Arc::new(PositionMap {
1852 size,
1853 scroll_max,
1854 line_layouts,
1855 line_height,
1856 em_width,
1857 em_advance,
1858 snapshot,
1859 }),
1860 visible_display_row_range: start_row..end_row,
1861 gutter_size,
1862 gutter_padding,
1863 text_size,
1864 scrollbar_row_range,
1865 show_scrollbars,
1866 max_row,
1867 gutter_margin,
1868 active_rows,
1869 highlighted_rows,
1870 highlighted_ranges,
1871 line_number_layouts,
1872 hunk_layouts,
1873 blocks,
1874 selections,
1875 context_menu,
1876 code_actions_indicator,
1877 hover_popovers: hover,
1878 },
1879 )
1880 }
1881
1882 fn paint(
1883 &mut self,
1884 bounds: RectF,
1885 visible_bounds: RectF,
1886 layout: &mut Self::LayoutState,
1887 cx: &mut PaintContext,
1888 ) -> Self::PaintState {
1889 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
1890 cx.scene.push_layer(Some(visible_bounds));
1891
1892 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1893 let text_bounds = RectF::new(
1894 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1895 layout.text_size,
1896 );
1897
1898 Self::attach_mouse_handlers(
1899 &self.view,
1900 &layout.position_map,
1901 visible_bounds,
1902 text_bounds,
1903 gutter_bounds,
1904 bounds,
1905 cx,
1906 );
1907
1908 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1909 if layout.gutter_size.x() > 0. {
1910 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1911 }
1912 self.paint_text(text_bounds, visible_bounds, layout, cx);
1913
1914 cx.scene.push_layer(Some(bounds));
1915 if !layout.blocks.is_empty() {
1916 self.paint_blocks(bounds, visible_bounds, layout, cx);
1917 }
1918 self.paint_scrollbar(bounds, layout, cx);
1919 cx.scene.pop_layer();
1920
1921 cx.scene.pop_layer();
1922 }
1923
1924 fn dispatch_event(
1925 &mut self,
1926 event: &Event,
1927 _: RectF,
1928 _: RectF,
1929 _: &mut LayoutState,
1930 _: &mut (),
1931 cx: &mut EventContext,
1932 ) -> bool {
1933 if let Event::ModifiersChanged(event) = event {
1934 self.modifiers_changed(*event, cx);
1935 }
1936
1937 false
1938 }
1939
1940 fn rect_for_text_range(
1941 &self,
1942 range_utf16: Range<usize>,
1943 bounds: RectF,
1944 _: RectF,
1945 layout: &Self::LayoutState,
1946 _: &Self::PaintState,
1947 _: &gpui::MeasurementContext,
1948 ) -> Option<RectF> {
1949 let text_bounds = RectF::new(
1950 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1951 layout.text_size,
1952 );
1953 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1954 let scroll_position = layout.position_map.snapshot.scroll_position();
1955 let start_row = scroll_position.y() as u32;
1956 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1957 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1958
1959 let range_start = OffsetUtf16(range_utf16.start)
1960 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1961 if range_start.row() < start_row {
1962 return None;
1963 }
1964
1965 let line = layout
1966 .position_map
1967 .line_layouts
1968 .get((range_start.row() - start_row) as usize)?;
1969 let range_start_x = line.x_for_index(range_start.column() as usize);
1970 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1971 Some(RectF::new(
1972 content_origin
1973 + vec2f(
1974 range_start_x,
1975 range_start_y + layout.position_map.line_height,
1976 )
1977 - vec2f(scroll_left, scroll_top),
1978 vec2f(
1979 layout.position_map.em_width,
1980 layout.position_map.line_height,
1981 ),
1982 ))
1983 }
1984
1985 fn debug(
1986 &self,
1987 bounds: RectF,
1988 _: &Self::LayoutState,
1989 _: &Self::PaintState,
1990 _: &gpui::DebugContext,
1991 ) -> json::Value {
1992 json!({
1993 "type": "BufferElement",
1994 "bounds": bounds.to_json()
1995 })
1996 }
1997}
1998
1999pub struct LayoutState {
2000 position_map: Arc<PositionMap>,
2001 gutter_size: Vector2F,
2002 gutter_padding: f32,
2003 gutter_margin: f32,
2004 text_size: Vector2F,
2005 mode: EditorMode,
2006 visible_display_row_range: Range<u32>,
2007 active_rows: BTreeMap<u32, bool>,
2008 highlighted_rows: Option<Range<u32>>,
2009 line_number_layouts: Vec<Option<text_layout::Line>>,
2010 hunk_layouts: Vec<DiffHunkLayout>,
2011 blocks: Vec<BlockLayout>,
2012 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2013 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2014 scrollbar_row_range: Range<f32>,
2015 show_scrollbars: bool,
2016 max_row: u32,
2017 context_menu: Option<(DisplayPoint, ElementBox)>,
2018 code_actions_indicator: Option<(u32, ElementBox)>,
2019 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
2020}
2021
2022pub struct PositionMap {
2023 size: Vector2F,
2024 line_height: f32,
2025 scroll_max: Vector2F,
2026 em_width: f32,
2027 em_advance: f32,
2028 line_layouts: Vec<text_layout::Line>,
2029 snapshot: EditorSnapshot,
2030}
2031
2032impl PositionMap {
2033 /// Returns two display points:
2034 /// 1. The nearest *valid* position in the editor
2035 /// 2. An unclipped, potentially *invalid* position that maps directly to
2036 /// the given pixel position.
2037 fn point_for_position(
2038 &self,
2039 text_bounds: RectF,
2040 position: Vector2F,
2041 ) -> (DisplayPoint, DisplayPoint) {
2042 let scroll_position = self.snapshot.scroll_position();
2043 let position = position - text_bounds.origin();
2044 let y = position.y().max(0.0).min(self.size.y());
2045 let x = position.x() + (scroll_position.x() * self.em_width);
2046 let row = (y / self.line_height + scroll_position.y()) as u32;
2047 let (column, x_overshoot) = if let Some(line) = self
2048 .line_layouts
2049 .get(row as usize - scroll_position.y() as usize)
2050 {
2051 if let Some(ix) = line.index_for_x(x) {
2052 (ix as u32, 0.0)
2053 } else {
2054 (line.len() as u32, 0f32.max(x - line.width()))
2055 }
2056 } else {
2057 (0, x)
2058 };
2059
2060 let mut target_point = DisplayPoint::new(row, column);
2061 let point = self.snapshot.clip_point(target_point, Bias::Left);
2062 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2063
2064 (point, target_point)
2065 }
2066}
2067
2068struct BlockLayout {
2069 row: u32,
2070 element: ElementBox,
2071 style: BlockStyle,
2072}
2073
2074fn layout_line(
2075 row: u32,
2076 snapshot: &EditorSnapshot,
2077 style: &EditorStyle,
2078 layout_cache: &TextLayoutCache,
2079) -> text_layout::Line {
2080 let mut line = snapshot.line(row);
2081
2082 if line.len() > MAX_LINE_LEN {
2083 let mut len = MAX_LINE_LEN;
2084 while !line.is_char_boundary(len) {
2085 len -= 1;
2086 }
2087
2088 line.truncate(len);
2089 }
2090
2091 layout_cache.layout_str(
2092 &line,
2093 style.text.font_size,
2094 &[(
2095 snapshot.line_len(row) as usize,
2096 RunStyle {
2097 font_id: style.text.font_id,
2098 color: Color::black(),
2099 underline: Default::default(),
2100 },
2101 )],
2102 )
2103}
2104
2105#[derive(Debug)]
2106pub struct Cursor {
2107 origin: Vector2F,
2108 block_width: f32,
2109 line_height: f32,
2110 color: Color,
2111 shape: CursorShape,
2112 block_text: Option<Line>,
2113}
2114
2115impl Cursor {
2116 pub fn new(
2117 origin: Vector2F,
2118 block_width: f32,
2119 line_height: f32,
2120 color: Color,
2121 shape: CursorShape,
2122 block_text: Option<Line>,
2123 ) -> Cursor {
2124 Cursor {
2125 origin,
2126 block_width,
2127 line_height,
2128 color,
2129 shape,
2130 block_text,
2131 }
2132 }
2133
2134 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2135 RectF::new(
2136 self.origin + origin,
2137 vec2f(self.block_width, self.line_height),
2138 )
2139 }
2140
2141 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2142 let bounds = match self.shape {
2143 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2144 CursorShape::Block | CursorShape::Hollow => RectF::new(
2145 self.origin + origin,
2146 vec2f(self.block_width, self.line_height),
2147 ),
2148 CursorShape::Underscore => RectF::new(
2149 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2150 vec2f(self.block_width, 2.0),
2151 ),
2152 };
2153
2154 //Draw background or border quad
2155 if matches!(self.shape, CursorShape::Hollow) {
2156 cx.scene.push_quad(Quad {
2157 bounds,
2158 background: None,
2159 border: Border::all(1., self.color),
2160 corner_radius: 0.,
2161 });
2162 } else {
2163 cx.scene.push_quad(Quad {
2164 bounds,
2165 background: Some(self.color),
2166 border: Default::default(),
2167 corner_radius: 0.,
2168 });
2169 }
2170
2171 if let Some(block_text) = &self.block_text {
2172 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2173 }
2174 }
2175
2176 pub fn shape(&self) -> CursorShape {
2177 self.shape
2178 }
2179}
2180
2181#[derive(Debug)]
2182pub struct HighlightedRange {
2183 pub start_y: f32,
2184 pub line_height: f32,
2185 pub lines: Vec<HighlightedRangeLine>,
2186 pub color: Color,
2187 pub corner_radius: f32,
2188}
2189
2190#[derive(Debug)]
2191pub struct HighlightedRangeLine {
2192 pub start_x: f32,
2193 pub end_x: f32,
2194}
2195
2196impl HighlightedRange {
2197 pub fn paint(&self, bounds: RectF, scene: &mut Scene) {
2198 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2199 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2200 self.paint_lines(
2201 self.start_y + self.line_height,
2202 &self.lines[1..],
2203 bounds,
2204 scene,
2205 );
2206 } else {
2207 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2208 }
2209 }
2210
2211 fn paint_lines(
2212 &self,
2213 start_y: f32,
2214 lines: &[HighlightedRangeLine],
2215 bounds: RectF,
2216 scene: &mut Scene,
2217 ) {
2218 if lines.is_empty() {
2219 return;
2220 }
2221
2222 let mut path = PathBuilder::new();
2223 let first_line = lines.first().unwrap();
2224 let last_line = lines.last().unwrap();
2225
2226 let first_top_left = vec2f(first_line.start_x, start_y);
2227 let first_top_right = vec2f(first_line.end_x, start_y);
2228
2229 let curve_height = vec2f(0., self.corner_radius);
2230 let curve_width = |start_x: f32, end_x: f32| {
2231 let max = (end_x - start_x) / 2.;
2232 let width = if max < self.corner_radius {
2233 max
2234 } else {
2235 self.corner_radius
2236 };
2237
2238 vec2f(width, 0.)
2239 };
2240
2241 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2242 path.reset(first_top_right - top_curve_width);
2243 path.curve_to(first_top_right + curve_height, first_top_right);
2244
2245 let mut iter = lines.iter().enumerate().peekable();
2246 while let Some((ix, line)) = iter.next() {
2247 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2248
2249 if let Some((_, next_line)) = iter.peek() {
2250 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2251
2252 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2253 Ordering::Equal => {
2254 path.line_to(bottom_right);
2255 }
2256 Ordering::Less => {
2257 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2258 path.line_to(bottom_right - curve_height);
2259 if self.corner_radius > 0. {
2260 path.curve_to(bottom_right - curve_width, bottom_right);
2261 }
2262 path.line_to(next_top_right + curve_width);
2263 if self.corner_radius > 0. {
2264 path.curve_to(next_top_right + curve_height, next_top_right);
2265 }
2266 }
2267 Ordering::Greater => {
2268 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2269 path.line_to(bottom_right - curve_height);
2270 if self.corner_radius > 0. {
2271 path.curve_to(bottom_right + curve_width, bottom_right);
2272 }
2273 path.line_to(next_top_right - curve_width);
2274 if self.corner_radius > 0. {
2275 path.curve_to(next_top_right + curve_height, next_top_right);
2276 }
2277 }
2278 }
2279 } else {
2280 let curve_width = curve_width(line.start_x, line.end_x);
2281 path.line_to(bottom_right - curve_height);
2282 if self.corner_radius > 0. {
2283 path.curve_to(bottom_right - curve_width, bottom_right);
2284 }
2285
2286 let bottom_left = vec2f(line.start_x, bottom_right.y());
2287 path.line_to(bottom_left + curve_width);
2288 if self.corner_radius > 0. {
2289 path.curve_to(bottom_left - curve_height, bottom_left);
2290 }
2291 }
2292 }
2293
2294 if first_line.start_x > last_line.start_x {
2295 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2296 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2297 path.line_to(second_top_left + curve_height);
2298 if self.corner_radius > 0. {
2299 path.curve_to(second_top_left + curve_width, second_top_left);
2300 }
2301 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2302 path.line_to(first_bottom_left - curve_width);
2303 if self.corner_radius > 0. {
2304 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2305 }
2306 }
2307
2308 path.line_to(first_top_left + curve_height);
2309 if self.corner_radius > 0. {
2310 path.curve_to(first_top_left + top_curve_width, first_top_left);
2311 }
2312 path.line_to(first_top_right - top_curve_width);
2313
2314 scene.push_path(path.build(self.color, Some(bounds)));
2315 }
2316}
2317
2318pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2319 delta.powf(1.5) / 100.0
2320}
2321
2322fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2323 delta.powf(1.2) / 300.0
2324}
2325
2326#[cfg(test)]
2327mod tests {
2328 use std::sync::Arc;
2329
2330 use super::*;
2331 use crate::{
2332 display_map::{BlockDisposition, BlockProperties},
2333 Editor, MultiBuffer,
2334 };
2335 use settings::Settings;
2336 use util::test::sample_text;
2337
2338 #[gpui::test]
2339 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2340 cx.set_global(Settings::test(cx));
2341 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2342 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2343 Editor::new(EditorMode::Full, buffer, None, None, cx)
2344 });
2345 let element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2346
2347 let layouts = editor.update(cx, |editor, cx| {
2348 let snapshot = editor.snapshot(cx);
2349 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2350 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2351 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &layout_cx)
2352 });
2353 assert_eq!(layouts.len(), 6);
2354 }
2355
2356 #[gpui::test]
2357 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2358 cx.set_global(Settings::test(cx));
2359 let buffer = MultiBuffer::build_simple("", cx);
2360 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2361 Editor::new(EditorMode::Full, buffer, None, None, cx)
2362 });
2363
2364 editor.update(cx, |editor, cx| {
2365 editor.set_placeholder_text("hello", cx);
2366 editor.insert_blocks(
2367 [BlockProperties {
2368 style: BlockStyle::Fixed,
2369 disposition: BlockDisposition::Above,
2370 height: 3,
2371 position: Anchor::min(),
2372 render: Arc::new(|_| Empty::new().boxed()),
2373 }],
2374 cx,
2375 );
2376
2377 // Blur the editor so that it displays placeholder text.
2378 cx.blur();
2379 });
2380
2381 let mut element = EditorElement::new(editor.downgrade(), editor.read(cx).style(cx));
2382
2383 let mut scene = Scene::new(1.0);
2384 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2385 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2386 let (size, mut state) = element.layout(
2387 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2388 &mut layout_cx,
2389 );
2390
2391 assert_eq!(state.position_map.line_layouts.len(), 4);
2392 assert_eq!(
2393 state
2394 .line_number_layouts
2395 .iter()
2396 .map(Option::is_some)
2397 .collect::<Vec<_>>(),
2398 &[false, false, false, true]
2399 );
2400
2401 // Don't panic.
2402 let bounds = RectF::new(Default::default(), size);
2403 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2404 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2405 }
2406}