1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, SelectPhase, SoftWrap, ToPoint,
4 MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, FoldStatus, TransformBlock},
8 editor_settings::ShowScrollbar,
9 git::{diff_hunk_to_display, DisplayDiffHunk},
10 hover_popover::{
11 hide_hover, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH,
12 MIN_POPOVER_LINE_HEIGHT,
13 },
14 link_go_to_definition::{
15 go_to_fetched_definition, go_to_fetched_type_definition, update_go_to_definition_link,
16 },
17 mouse_context_menu, EditorSettings, EditorStyle, GutterHover, UnfoldAt,
18};
19use clock::ReplicaId;
20use collections::{BTreeMap, HashMap};
21use git::diff::DiffHunkStatus;
22use gpui::{
23 color::Color,
24 elements::*,
25 fonts::{HighlightStyle, TextStyle, Underline},
26 geometry::{
27 rect::RectF,
28 vector::{vec2f, Vector2F},
29 PathBuilder,
30 },
31 json::{self, ToJson},
32 platform::{CursorStyle, Modifiers, MouseButton, MouseButtonEvent, MouseMovedEvent},
33 text_layout::{self, Line, RunStyle, TextLayoutCache},
34 AnyElement, Axis, Border, CursorRegion, Element, EventContext, FontCache, LayoutContext,
35 MouseRegion, Quad, SceneBuilder, SizeConstraint, ViewContext, WindowContext,
36};
37use itertools::Itertools;
38use json::json;
39use language::{
40 language_settings::ShowWhitespaceSetting, Bias, CursorShape, DiagnosticSeverity, OffsetUtf16,
41 Selection,
42};
43use project::{
44 project_settings::{GitGutterSetting, ProjectSettings},
45 ProjectPath,
46};
47use smallvec::SmallVec;
48use std::{
49 borrow::Cow,
50 cmp::{self, Ordering},
51 fmt::Write,
52 iter,
53 ops::Range,
54 sync::Arc,
55};
56use text::Point;
57use workspace::item::Item;
58
59enum FoldMarkers {}
60
61struct SelectionLayout {
62 head: DisplayPoint,
63 cursor_shape: CursorShape,
64 range: Range<DisplayPoint>,
65}
66
67impl SelectionLayout {
68 fn new<T: ToPoint + ToDisplayPoint + Clone>(
69 selection: Selection<T>,
70 line_mode: bool,
71 cursor_shape: CursorShape,
72 map: &DisplaySnapshot,
73 ) -> Self {
74 if line_mode {
75 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
76 let point_range = map.expand_to_line(selection.range());
77 Self {
78 head: selection.head().to_display_point(map),
79 cursor_shape,
80 range: point_range.start.to_display_point(map)
81 ..point_range.end.to_display_point(map),
82 }
83 } else {
84 let selection = selection.map(|p| p.to_display_point(map));
85 Self {
86 head: selection.head(),
87 cursor_shape,
88 range: selection.range(),
89 }
90 }
91 }
92}
93
94pub struct RenderExcerptHeaderParams<'a> {
95 pub id: crate::ExcerptId,
96 pub buffer: &'a language::BufferSnapshot,
97 pub range: &'a crate::ExcerptRange<text::Anchor>,
98 pub starts_new_buffer: bool,
99 pub gutter_padding: f32,
100 pub editor_style: &'a EditorStyle,
101}
102
103pub type RenderExcerptHeader = Arc<
104 dyn Fn(
105 &mut Editor,
106 RenderExcerptHeaderParams,
107 &mut LayoutContext<Editor>,
108 ) -> AnyElement<Editor>,
109>;
110
111pub struct EditorElement {
112 style: Arc<EditorStyle>,
113 render_excerpt_header: RenderExcerptHeader,
114}
115
116impl EditorElement {
117 pub fn new(style: EditorStyle) -> Self {
118 Self {
119 style: Arc::new(style),
120 render_excerpt_header: Arc::new(render_excerpt_header),
121 }
122 }
123
124 pub fn with_render_excerpt_header(mut self, render: RenderExcerptHeader) -> Self {
125 self.render_excerpt_header = render;
126 self
127 }
128
129 fn attach_mouse_handlers(
130 scene: &mut SceneBuilder,
131 position_map: &Arc<PositionMap>,
132 has_popovers: bool,
133 visible_bounds: RectF,
134 text_bounds: RectF,
135 gutter_bounds: RectF,
136 bounds: RectF,
137 cx: &mut ViewContext<Editor>,
138 ) {
139 enum EditorElementMouseHandlers {}
140 scene.push_mouse_region(
141 MouseRegion::new::<EditorElementMouseHandlers>(
142 cx.view_id(),
143 cx.view_id(),
144 visible_bounds,
145 )
146 .on_down(MouseButton::Left, {
147 let position_map = position_map.clone();
148 move |event, editor, cx| {
149 if !Self::mouse_down(
150 editor,
151 event.platform_event,
152 position_map.as_ref(),
153 text_bounds,
154 gutter_bounds,
155 cx,
156 ) {
157 cx.propagate_event();
158 }
159 }
160 })
161 .on_down(MouseButton::Right, {
162 let position_map = position_map.clone();
163 move |event, editor, cx| {
164 if !Self::mouse_right_down(
165 editor,
166 event.position,
167 position_map.as_ref(),
168 text_bounds,
169 cx,
170 ) {
171 cx.propagate_event();
172 }
173 }
174 })
175 .on_up(MouseButton::Left, {
176 let position_map = position_map.clone();
177 move |event, editor, cx| {
178 if !Self::mouse_up(
179 editor,
180 event.position,
181 event.cmd,
182 event.shift,
183 position_map.as_ref(),
184 text_bounds,
185 cx,
186 ) {
187 cx.propagate_event()
188 }
189 }
190 })
191 .on_drag(MouseButton::Left, {
192 let position_map = position_map.clone();
193 move |event, editor, cx| {
194 if !Self::mouse_dragged(
195 editor,
196 event.platform_event,
197 position_map.as_ref(),
198 text_bounds,
199 cx,
200 ) {
201 cx.propagate_event()
202 }
203 }
204 })
205 .on_move({
206 let position_map = position_map.clone();
207 move |event, editor, cx| {
208 if !Self::mouse_moved(
209 editor,
210 event.platform_event,
211 &position_map,
212 text_bounds,
213 cx,
214 ) {
215 cx.propagate_event()
216 }
217 }
218 })
219 .on_move_out(move |_, editor: &mut Editor, cx| {
220 if has_popovers {
221 hide_hover(editor, cx);
222 }
223 })
224 .on_scroll({
225 let position_map = position_map.clone();
226 move |event, editor, cx| {
227 if !Self::scroll(
228 editor,
229 event.position,
230 *event.delta.raw(),
231 event.delta.precise(),
232 &position_map,
233 bounds,
234 cx,
235 ) {
236 cx.propagate_event()
237 }
238 }
239 }),
240 );
241
242 enum GutterHandlers {}
243 scene.push_mouse_region(
244 MouseRegion::new::<GutterHandlers>(cx.view_id(), cx.view_id() + 1, gutter_bounds)
245 .on_hover(|hover, editor: &mut Editor, cx| {
246 editor.gutter_hover(
247 &GutterHover {
248 hovered: hover.started,
249 },
250 cx,
251 );
252 }),
253 )
254 }
255
256 fn mouse_down(
257 editor: &mut Editor,
258 MouseButtonEvent {
259 position,
260 modifiers:
261 Modifiers {
262 shift,
263 ctrl,
264 alt,
265 cmd,
266 ..
267 },
268 mut click_count,
269 ..
270 }: MouseButtonEvent,
271 position_map: &PositionMap,
272 text_bounds: RectF,
273 gutter_bounds: RectF,
274 cx: &mut EventContext<Editor>,
275 ) -> bool {
276 if gutter_bounds.contains_point(position) {
277 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
278 } else if !text_bounds.contains_point(position) {
279 return false;
280 }
281
282 let (position, target_position) = position_map.point_for_position(text_bounds, position);
283
284 if shift && alt {
285 editor.select(
286 SelectPhase::BeginColumnar {
287 position,
288 goal_column: target_position.column(),
289 },
290 cx,
291 );
292 } else if shift && !ctrl && !alt && !cmd {
293 editor.select(
294 SelectPhase::Extend {
295 position,
296 click_count,
297 },
298 cx,
299 );
300 } else {
301 editor.select(
302 SelectPhase::Begin {
303 position,
304 add: alt,
305 click_count,
306 },
307 cx,
308 );
309 }
310
311 true
312 }
313
314 fn mouse_right_down(
315 editor: &mut Editor,
316 position: Vector2F,
317 position_map: &PositionMap,
318 text_bounds: RectF,
319 cx: &mut EventContext<Editor>,
320 ) -> bool {
321 if !text_bounds.contains_point(position) {
322 return false;
323 }
324
325 let (point, _) = position_map.point_for_position(text_bounds, position);
326 mouse_context_menu::deploy_context_menu(editor, position, point, cx);
327 true
328 }
329
330 fn mouse_up(
331 editor: &mut Editor,
332 position: Vector2F,
333 cmd: bool,
334 shift: bool,
335 position_map: &PositionMap,
336 text_bounds: RectF,
337 cx: &mut EventContext<Editor>,
338 ) -> bool {
339 let end_selection = editor.has_pending_selection();
340 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
341
342 if end_selection {
343 editor.select(SelectPhase::End, cx);
344 }
345
346 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
347 let (point, target_point) = position_map.point_for_position(text_bounds, position);
348
349 if point == target_point {
350 if shift {
351 go_to_fetched_type_definition(editor, point, cx);
352 } else {
353 go_to_fetched_definition(editor, point, cx);
354 }
355
356 return true;
357 }
358 }
359
360 end_selection
361 }
362
363 fn mouse_dragged(
364 editor: &mut Editor,
365 MouseMovedEvent {
366 modifiers: Modifiers { cmd, shift, .. },
367 position,
368 ..
369 }: MouseMovedEvent,
370 position_map: &PositionMap,
371 text_bounds: RectF,
372 cx: &mut EventContext<Editor>,
373 ) -> bool {
374 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
375 // Don't trigger hover popover if mouse is hovering over context menu
376 let point = if text_bounds.contains_point(position) {
377 let (point, target_point) = position_map.point_for_position(text_bounds, position);
378 if point == target_point {
379 Some(point)
380 } else {
381 None
382 }
383 } else {
384 None
385 };
386
387 update_go_to_definition_link(editor, point, cmd, shift, cx);
388
389 if editor.has_pending_selection() {
390 let mut scroll_delta = Vector2F::zero();
391
392 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
393 let top = text_bounds.origin_y() + vertical_margin;
394 let bottom = text_bounds.lower_left().y() - vertical_margin;
395 if position.y() < top {
396 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
397 }
398 if position.y() > bottom {
399 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
400 }
401
402 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
403 let left = text_bounds.origin_x() + horizontal_margin;
404 let right = text_bounds.upper_right().x() - horizontal_margin;
405 if position.x() < left {
406 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
407 left - position.x(),
408 ))
409 }
410 if position.x() > right {
411 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
412 position.x() - right,
413 ))
414 }
415
416 let (position, target_position) =
417 position_map.point_for_position(text_bounds, position);
418
419 editor.select(
420 SelectPhase::Update {
421 position,
422 goal_column: target_position.column(),
423 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
424 .clamp(Vector2F::zero(), position_map.scroll_max),
425 },
426 cx,
427 );
428 hover_at(editor, point, cx);
429 true
430 } else {
431 hover_at(editor, point, cx);
432 false
433 }
434 }
435
436 fn mouse_moved(
437 editor: &mut Editor,
438 MouseMovedEvent {
439 modifiers: Modifiers { shift, cmd, .. },
440 position,
441 ..
442 }: MouseMovedEvent,
443 position_map: &PositionMap,
444 text_bounds: RectF,
445 cx: &mut ViewContext<Editor>,
446 ) -> bool {
447 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
448 // Don't trigger hover popover if mouse is hovering over context menu
449 let point = position_to_display_point(position, text_bounds, position_map);
450
451 update_go_to_definition_link(editor, point, cmd, shift, cx);
452 hover_at(editor, point, cx);
453
454 true
455 }
456
457 fn scroll(
458 editor: &mut Editor,
459 position: Vector2F,
460 mut delta: Vector2F,
461 precise: bool,
462 position_map: &PositionMap,
463 bounds: RectF,
464 cx: &mut ViewContext<Editor>,
465 ) -> bool {
466 if !bounds.contains_point(position) {
467 return false;
468 }
469
470 let line_height = position_map.line_height;
471 let max_glyph_width = position_map.em_width;
472
473 let axis = if precise {
474 //Trackpad
475 position_map.snapshot.ongoing_scroll.filter(&mut delta)
476 } else {
477 //Not trackpad
478 delta *= vec2f(max_glyph_width, line_height);
479 None //Resets ongoing scroll
480 };
481
482 let scroll_position = position_map.snapshot.scroll_position();
483 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
484 let y = (scroll_position.y() * line_height - delta.y()) / line_height;
485 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
486 editor.scroll(scroll_position, axis, cx);
487
488 true
489 }
490
491 fn paint_background(
492 &self,
493 scene: &mut SceneBuilder,
494 gutter_bounds: RectF,
495 text_bounds: RectF,
496 layout: &LayoutState,
497 ) {
498 let bounds = gutter_bounds.union_rect(text_bounds);
499 let scroll_top =
500 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
501 scene.push_quad(Quad {
502 bounds: gutter_bounds,
503 background: Some(self.style.gutter_background),
504 border: Border::new(0., Color::transparent_black()),
505 corner_radius: 0.,
506 });
507 scene.push_quad(Quad {
508 bounds: text_bounds,
509 background: Some(self.style.background),
510 border: Border::new(0., Color::transparent_black()),
511 corner_radius: 0.,
512 });
513
514 if let EditorMode::Full = layout.mode {
515 let mut active_rows = layout.active_rows.iter().peekable();
516 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
517 let mut end_row = *start_row;
518 while active_rows.peek().map_or(false, |r| {
519 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
520 }) {
521 active_rows.next().unwrap();
522 end_row += 1;
523 }
524
525 if !contains_non_empty_selection {
526 let origin = vec2f(
527 bounds.origin_x(),
528 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
529 - scroll_top,
530 );
531 let size = vec2f(
532 bounds.width(),
533 layout.position_map.line_height * (end_row - start_row + 1) as f32,
534 );
535 scene.push_quad(Quad {
536 bounds: RectF::new(origin, size),
537 background: Some(self.style.active_line_background),
538 border: Border::default(),
539 corner_radius: 0.,
540 });
541 }
542 }
543
544 if let Some(highlighted_rows) = &layout.highlighted_rows {
545 let origin = vec2f(
546 bounds.origin_x(),
547 bounds.origin_y()
548 + (layout.position_map.line_height * highlighted_rows.start as f32)
549 - scroll_top,
550 );
551 let size = vec2f(
552 bounds.width(),
553 layout.position_map.line_height * highlighted_rows.len() as f32,
554 );
555 scene.push_quad(Quad {
556 bounds: RectF::new(origin, size),
557 background: Some(self.style.highlighted_line_background),
558 border: Border::default(),
559 corner_radius: 0.,
560 });
561 }
562 }
563 }
564
565 fn paint_gutter(
566 &mut self,
567 scene: &mut SceneBuilder,
568 bounds: RectF,
569 visible_bounds: RectF,
570 layout: &mut LayoutState,
571 editor: &mut Editor,
572 cx: &mut ViewContext<Editor>,
573 ) {
574 let line_height = layout.position_map.line_height;
575
576 let scroll_position = layout.position_map.snapshot.scroll_position();
577 let scroll_top = scroll_position.y() * line_height;
578
579 let show_gutter = matches!(
580 settings::get::<ProjectSettings>(cx).git.git_gutter,
581 Some(GitGutterSetting::TrackedFiles)
582 );
583
584 if show_gutter {
585 Self::paint_diff_hunks(scene, bounds, layout, cx);
586 }
587
588 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
589 if let Some(line) = line {
590 let line_origin = bounds.origin()
591 + vec2f(
592 bounds.width() - line.width() - layout.gutter_padding,
593 ix as f32 * line_height - (scroll_top % line_height),
594 );
595
596 line.paint(scene, line_origin, visible_bounds, line_height, cx);
597 }
598 }
599
600 for (ix, fold_indicator) in layout.fold_indicators.iter_mut().enumerate() {
601 if let Some(indicator) = fold_indicator.as_mut() {
602 let position = vec2f(
603 bounds.width() - layout.gutter_padding,
604 ix as f32 * line_height - (scroll_top % line_height),
605 );
606 let centering_offset = vec2f(
607 (layout.gutter_padding + layout.gutter_margin - indicator.size().x()) / 2.,
608 (line_height - indicator.size().y()) / 2.,
609 );
610
611 let indicator_origin = bounds.origin() + position + centering_offset;
612
613 indicator.paint(scene, indicator_origin, visible_bounds, editor, cx);
614 }
615 }
616
617 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
618 let mut x = 0.;
619 let mut y = *row as f32 * line_height - scroll_top;
620 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
621 y += (line_height - indicator.size().y()) / 2.;
622 indicator.paint(
623 scene,
624 bounds.origin() + vec2f(x, y),
625 visible_bounds,
626 editor,
627 cx,
628 );
629 }
630 }
631
632 fn paint_diff_hunks(
633 scene: &mut SceneBuilder,
634 bounds: RectF,
635 layout: &mut LayoutState,
636 cx: &mut ViewContext<Editor>,
637 ) {
638 let diff_style = &theme::current(cx).editor.diff.clone();
639 let line_height = layout.position_map.line_height;
640
641 let scroll_position = layout.position_map.snapshot.scroll_position();
642 let scroll_top = scroll_position.y() * line_height;
643
644 for hunk in &layout.display_hunks {
645 let (display_row_range, status) = match hunk {
646 //TODO: This rendering is entirely a horrible hack
647 &DisplayDiffHunk::Folded { display_row: row } => {
648 let start_y = row as f32 * line_height - scroll_top;
649 let end_y = start_y + line_height;
650
651 let width = diff_style.removed_width_em * line_height;
652 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
653 let highlight_size = vec2f(width * 2., end_y - start_y);
654 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
655
656 scene.push_quad(Quad {
657 bounds: highlight_bounds,
658 background: Some(diff_style.modified),
659 border: Border::new(0., Color::transparent_black()),
660 corner_radius: 1. * line_height,
661 });
662
663 continue;
664 }
665
666 DisplayDiffHunk::Unfolded {
667 display_row_range,
668 status,
669 } => (display_row_range, status),
670 };
671
672 let color = match status {
673 DiffHunkStatus::Added => diff_style.inserted,
674 DiffHunkStatus::Modified => diff_style.modified,
675
676 //TODO: This rendering is entirely a horrible hack
677 DiffHunkStatus::Removed => {
678 let row = display_row_range.start;
679
680 let offset = line_height / 2.;
681 let start_y = row as f32 * line_height - offset - scroll_top;
682 let end_y = start_y + line_height;
683
684 let width = diff_style.removed_width_em * line_height;
685 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
686 let highlight_size = vec2f(width * 2., end_y - start_y);
687 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
688
689 scene.push_quad(Quad {
690 bounds: highlight_bounds,
691 background: Some(diff_style.deleted),
692 border: Border::new(0., Color::transparent_black()),
693 corner_radius: 1. * line_height,
694 });
695
696 continue;
697 }
698 };
699
700 let start_row = display_row_range.start;
701 let end_row = display_row_range.end;
702
703 let start_y = start_row as f32 * line_height - scroll_top;
704 let end_y = end_row as f32 * line_height - scroll_top;
705
706 let width = diff_style.width_em * line_height;
707 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
708 let highlight_size = vec2f(width * 2., end_y - start_y);
709 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
710
711 scene.push_quad(Quad {
712 bounds: highlight_bounds,
713 background: Some(color),
714 border: Border::new(0., Color::transparent_black()),
715 corner_radius: diff_style.corner_radius * line_height,
716 });
717 }
718 }
719
720 fn paint_text(
721 &mut self,
722 scene: &mut SceneBuilder,
723 bounds: RectF,
724 visible_bounds: RectF,
725 layout: &mut LayoutState,
726 editor: &mut Editor,
727 cx: &mut ViewContext<Editor>,
728 ) {
729 let style = &self.style;
730 let local_replica_id = editor.replica_id(cx);
731 let scroll_position = layout.position_map.snapshot.scroll_position();
732 let start_row = layout.visible_display_row_range.start;
733 let scroll_top = scroll_position.y() * layout.position_map.line_height;
734 let max_glyph_width = layout.position_map.em_width;
735 let scroll_left = scroll_position.x() * max_glyph_width;
736 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
737 let line_end_overshoot = 0.15 * layout.position_map.line_height;
738 let whitespace_setting = editor.buffer.read(cx).settings_at(0, cx).show_whitespaces;
739
740 scene.push_layer(Some(bounds));
741
742 scene.push_cursor_region(CursorRegion {
743 bounds,
744 style: if !editor.link_go_to_definition_state.definitions.is_empty() {
745 CursorStyle::PointingHand
746 } else {
747 CursorStyle::IBeam
748 },
749 });
750
751 let fold_corner_radius =
752 self.style.folds.ellipses.corner_radius_factor * layout.position_map.line_height;
753 for (id, range, color) in layout.fold_ranges.iter() {
754 self.paint_highlighted_range(
755 scene,
756 range.clone(),
757 *color,
758 fold_corner_radius,
759 fold_corner_radius * 2.,
760 layout,
761 content_origin,
762 scroll_top,
763 scroll_left,
764 bounds,
765 );
766
767 for bound in range_to_bounds(
768 &range,
769 content_origin,
770 scroll_left,
771 scroll_top,
772 &layout.visible_display_row_range,
773 line_end_overshoot,
774 &layout.position_map,
775 ) {
776 scene.push_cursor_region(CursorRegion {
777 bounds: bound,
778 style: CursorStyle::PointingHand,
779 });
780
781 let display_row = range.start.row();
782
783 let buffer_row = DisplayPoint::new(display_row, 0)
784 .to_point(&layout.position_map.snapshot.display_snapshot)
785 .row;
786
787 scene.push_mouse_region(
788 MouseRegion::new::<FoldMarkers>(cx.view_id(), *id as usize, bound)
789 .on_click(MouseButton::Left, move |_, editor: &mut Editor, cx| {
790 editor.unfold_at(&UnfoldAt { buffer_row }, cx)
791 })
792 .with_notify_on_hover(true)
793 .with_notify_on_click(true),
794 )
795 }
796 }
797
798 for (range, color) in &layout.highlighted_ranges {
799 self.paint_highlighted_range(
800 scene,
801 range.clone(),
802 *color,
803 0.,
804 line_end_overshoot,
805 layout,
806 content_origin,
807 scroll_top,
808 scroll_left,
809 bounds,
810 );
811 }
812
813 let mut cursors = SmallVec::<[Cursor; 32]>::new();
814 let corner_radius = 0.15 * layout.position_map.line_height;
815 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
816
817 for (replica_id, selections) in &layout.selections {
818 let replica_id = *replica_id;
819 let selection_style = style.replica_selection_style(replica_id);
820
821 for selection in selections {
822 if !selection.range.is_empty()
823 && (replica_id == local_replica_id
824 || Some(replica_id) == editor.leader_replica_id)
825 {
826 invisible_display_ranges.push(selection.range.clone());
827 }
828 self.paint_highlighted_range(
829 scene,
830 selection.range.clone(),
831 selection_style.selection,
832 corner_radius,
833 corner_radius * 2.,
834 layout,
835 content_origin,
836 scroll_top,
837 scroll_left,
838 bounds,
839 );
840
841 if editor.show_local_cursors(cx) || replica_id != local_replica_id {
842 let cursor_position = selection.head;
843 if layout
844 .visible_display_row_range
845 .contains(&cursor_position.row())
846 {
847 let cursor_row_layout = &layout.position_map.line_layouts
848 [(cursor_position.row() - start_row) as usize]
849 .line;
850 let cursor_column = cursor_position.column() as usize;
851
852 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
853 let mut block_width =
854 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
855 if block_width == 0.0 {
856 block_width = layout.position_map.em_width;
857 }
858 let block_text = if let CursorShape::Block = selection.cursor_shape {
859 layout
860 .position_map
861 .snapshot
862 .chars_at(cursor_position)
863 .next()
864 .and_then(|(character, _)| {
865 let font_id =
866 cursor_row_layout.font_for_index(cursor_column)?;
867 let text = character.to_string();
868
869 Some(cx.text_layout_cache().layout_str(
870 &text,
871 cursor_row_layout.font_size(),
872 &[(
873 text.len(),
874 RunStyle {
875 font_id,
876 color: style.background,
877 underline: Default::default(),
878 },
879 )],
880 ))
881 })
882 } else {
883 None
884 };
885
886 let x = cursor_character_x - scroll_left;
887 let y = cursor_position.row() as f32 * layout.position_map.line_height
888 - scroll_top;
889 cursors.push(Cursor {
890 color: selection_style.cursor,
891 block_width,
892 origin: vec2f(x, y),
893 line_height: layout.position_map.line_height,
894 shape: selection.cursor_shape,
895 block_text,
896 });
897 }
898 }
899 }
900 }
901
902 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
903 for (ix, line_with_invisibles) in layout.position_map.line_layouts.iter().enumerate() {
904 let row = start_row + ix as u32;
905 line_with_invisibles.draw(
906 layout,
907 row,
908 scroll_top,
909 scene,
910 content_origin,
911 scroll_left,
912 visible_text_bounds,
913 whitespace_setting,
914 &invisible_display_ranges,
915 visible_bounds,
916 cx,
917 )
918 }
919 }
920
921 scene.paint_layer(Some(bounds), |scene| {
922 for cursor in cursors {
923 cursor.paint(scene, content_origin, cx);
924 }
925 });
926
927 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
928 scene.push_stacking_context(None, None);
929 let cursor_row_layout =
930 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
931 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
932 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
933 let mut list_origin = content_origin + vec2f(x, y);
934 let list_width = context_menu.size().x();
935 let list_height = context_menu.size().y();
936
937 // Snap the right edge of the list to the right edge of the window if
938 // its horizontal bounds overflow.
939 if list_origin.x() + list_width > cx.window_size().x() {
940 list_origin.set_x((cx.window_size().x() - list_width).max(0.));
941 }
942
943 if list_origin.y() + list_height > bounds.max_y() {
944 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
945 }
946
947 context_menu.paint(
948 scene,
949 list_origin,
950 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
951 editor,
952 cx,
953 );
954
955 scene.pop_stacking_context();
956 }
957
958 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
959 scene.push_stacking_context(None, None);
960
961 // This is safe because we check on layout whether the required row is available
962 let hovered_row_layout =
963 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
964
965 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
966 // height. This is the size we will use to decide whether to render popovers above or below
967 // the hovered line.
968 let first_size = hover_popovers[0].size();
969 let height_to_reserve = first_size.y()
970 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
971
972 // Compute Hovered Point
973 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
974 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
975 let hovered_point = content_origin + vec2f(x, y);
976
977 if hovered_point.y() - height_to_reserve > 0.0 {
978 // There is enough space above. Render popovers above the hovered point
979 let mut current_y = hovered_point.y();
980 for hover_popover in hover_popovers {
981 let size = hover_popover.size();
982 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
983
984 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
985 if x_out_of_bounds < 0.0 {
986 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
987 }
988
989 hover_popover.paint(
990 scene,
991 popover_origin,
992 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
993 editor,
994 cx,
995 );
996
997 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
998 }
999 } else {
1000 // There is not enough space above. Render popovers below the hovered point
1001 let mut current_y = hovered_point.y() + layout.position_map.line_height;
1002 for hover_popover in hover_popovers {
1003 let size = hover_popover.size();
1004 let mut popover_origin = vec2f(hovered_point.x(), current_y);
1005
1006 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
1007 if x_out_of_bounds < 0.0 {
1008 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
1009 }
1010
1011 hover_popover.paint(
1012 scene,
1013 popover_origin,
1014 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
1015 editor,
1016 cx,
1017 );
1018
1019 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
1020 }
1021 }
1022
1023 scene.pop_stacking_context();
1024 }
1025
1026 scene.pop_layer();
1027 }
1028
1029 fn paint_scrollbar(
1030 &mut self,
1031 scene: &mut SceneBuilder,
1032 bounds: RectF,
1033 layout: &mut LayoutState,
1034 cx: &mut ViewContext<Editor>,
1035 ) {
1036 enum ScrollbarMouseHandlers {}
1037 if layout.mode != EditorMode::Full {
1038 return;
1039 }
1040
1041 let style = &self.style.theme.scrollbar;
1042
1043 let top = bounds.min_y();
1044 let bottom = bounds.max_y();
1045 let right = bounds.max_x();
1046 let left = right - style.width;
1047 let row_range = &layout.scrollbar_row_range;
1048 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1049
1050 let mut height = bounds.height();
1051 let mut first_row_y_offset = 0.0;
1052
1053 // Impose a minimum height on the scrollbar thumb
1054 let row_height = height / max_row;
1055 let min_thumb_height =
1056 style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1057 let thumb_height = (row_range.end - row_range.start) * row_height;
1058 if thumb_height < min_thumb_height {
1059 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1060 height -= min_thumb_height - thumb_height;
1061 }
1062
1063 let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1064
1065 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1066 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1067 let track_bounds = RectF::from_points(vec2f(left, top), vec2f(right, bottom));
1068 let thumb_bounds = RectF::from_points(vec2f(left, thumb_top), vec2f(right, thumb_bottom));
1069
1070 if layout.show_scrollbars {
1071 scene.push_quad(Quad {
1072 bounds: track_bounds,
1073 border: style.track.border,
1074 background: style.track.background_color,
1075 ..Default::default()
1076 });
1077
1078 if layout.is_singleton && settings::get::<EditorSettings>(cx).scrollbar.git_diff {
1079 let diff_style = theme::current(cx).editor.scrollbar.git.clone();
1080 for hunk in layout
1081 .position_map
1082 .snapshot
1083 .buffer_snapshot
1084 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1085 {
1086 let start_display = Point::new(hunk.buffer_range.start, 0)
1087 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1088 let end_display = Point::new(hunk.buffer_range.end, 0)
1089 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1090 let start_y = y_for_row(start_display.row() as f32);
1091 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1092 y_for_row((end_display.row() + 1) as f32)
1093 } else {
1094 y_for_row((end_display.row()) as f32)
1095 };
1096
1097 if end_y - start_y < 1. {
1098 end_y = start_y + 1.;
1099 }
1100 let bounds = RectF::from_points(vec2f(left, start_y), vec2f(right, end_y));
1101
1102 let color = match hunk.status() {
1103 DiffHunkStatus::Added => diff_style.inserted,
1104 DiffHunkStatus::Modified => diff_style.modified,
1105 DiffHunkStatus::Removed => diff_style.deleted,
1106 };
1107
1108 let border = Border {
1109 width: 1.,
1110 color: style.thumb.border.color,
1111 overlay: false,
1112 top: false,
1113 right: true,
1114 bottom: false,
1115 left: true,
1116 };
1117
1118 scene.push_quad(Quad {
1119 bounds,
1120 background: Some(color),
1121 border,
1122 corner_radius: style.thumb.corner_radius,
1123 })
1124 }
1125 }
1126
1127 scene.push_quad(Quad {
1128 bounds: thumb_bounds,
1129 border: style.thumb.border,
1130 background: style.thumb.background_color,
1131 corner_radius: style.thumb.corner_radius,
1132 });
1133 }
1134
1135 scene.push_cursor_region(CursorRegion {
1136 bounds: track_bounds,
1137 style: CursorStyle::Arrow,
1138 });
1139 scene.push_mouse_region(
1140 MouseRegion::new::<ScrollbarMouseHandlers>(cx.view_id(), cx.view_id(), track_bounds)
1141 .on_move(move |_, editor: &mut Editor, cx| {
1142 editor.scroll_manager.show_scrollbar(cx);
1143 })
1144 .on_down(MouseButton::Left, {
1145 let row_range = row_range.clone();
1146 move |event, editor: &mut Editor, cx| {
1147 let y = event.position.y();
1148 if y < thumb_top || thumb_bottom < y {
1149 let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1150 let top_row = center_row
1151 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1152 let mut position = editor.scroll_position(cx);
1153 position.set_y(top_row as f32);
1154 editor.set_scroll_position(position, cx);
1155 } else {
1156 editor.scroll_manager.show_scrollbar(cx);
1157 }
1158 }
1159 })
1160 .on_drag(MouseButton::Left, {
1161 move |event, editor: &mut Editor, cx| {
1162 let y = event.prev_mouse_position.y();
1163 let new_y = event.position.y();
1164 if thumb_top < y && y < thumb_bottom {
1165 let mut position = editor.scroll_position(cx);
1166 position.set_y(position.y() + (new_y - y) * (max_row as f32) / height);
1167 if position.y() < 0.0 {
1168 position.set_y(0.);
1169 }
1170 editor.set_scroll_position(position, cx);
1171 }
1172 }
1173 }),
1174 );
1175 }
1176
1177 #[allow(clippy::too_many_arguments)]
1178 fn paint_highlighted_range(
1179 &self,
1180 scene: &mut SceneBuilder,
1181 range: Range<DisplayPoint>,
1182 color: Color,
1183 corner_radius: f32,
1184 line_end_overshoot: f32,
1185 layout: &LayoutState,
1186 content_origin: Vector2F,
1187 scroll_top: f32,
1188 scroll_left: f32,
1189 bounds: RectF,
1190 ) {
1191 let start_row = layout.visible_display_row_range.start;
1192 let end_row = layout.visible_display_row_range.end;
1193 if range.start != range.end {
1194 let row_range = if range.end.column() == 0 {
1195 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1196 } else {
1197 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1198 };
1199
1200 let highlighted_range = HighlightedRange {
1201 color,
1202 line_height: layout.position_map.line_height,
1203 corner_radius,
1204 start_y: content_origin.y()
1205 + row_range.start as f32 * layout.position_map.line_height
1206 - scroll_top,
1207 lines: row_range
1208 .into_iter()
1209 .map(|row| {
1210 let line_layout =
1211 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1212 HighlightedRangeLine {
1213 start_x: if row == range.start.row() {
1214 content_origin.x()
1215 + line_layout.x_for_index(range.start.column() as usize)
1216 - scroll_left
1217 } else {
1218 content_origin.x() - scroll_left
1219 },
1220 end_x: if row == range.end.row() {
1221 content_origin.x()
1222 + line_layout.x_for_index(range.end.column() as usize)
1223 - scroll_left
1224 } else {
1225 content_origin.x() + line_layout.width() + line_end_overshoot
1226 - scroll_left
1227 },
1228 }
1229 })
1230 .collect(),
1231 };
1232
1233 highlighted_range.paint(bounds, scene);
1234 }
1235 }
1236
1237 fn paint_blocks(
1238 &mut self,
1239 scene: &mut SceneBuilder,
1240 bounds: RectF,
1241 visible_bounds: RectF,
1242 layout: &mut LayoutState,
1243 editor: &mut Editor,
1244 cx: &mut ViewContext<Editor>,
1245 ) {
1246 let scroll_position = layout.position_map.snapshot.scroll_position();
1247 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1248 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1249
1250 for block in &mut layout.blocks {
1251 let mut origin = bounds.origin()
1252 + vec2f(
1253 0.,
1254 block.row as f32 * layout.position_map.line_height - scroll_top,
1255 );
1256 if !matches!(block.style, BlockStyle::Sticky) {
1257 origin += vec2f(-scroll_left, 0.);
1258 }
1259 block
1260 .element
1261 .paint(scene, origin, visible_bounds, editor, cx);
1262 }
1263 }
1264
1265 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &ViewContext<Editor>) -> f32 {
1266 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1267 let style = &self.style;
1268
1269 cx.text_layout_cache()
1270 .layout_str(
1271 "1".repeat(digit_count).as_str(),
1272 style.text.font_size,
1273 &[(
1274 digit_count,
1275 RunStyle {
1276 font_id: style.text.font_id,
1277 color: Color::black(),
1278 underline: Default::default(),
1279 },
1280 )],
1281 )
1282 .width()
1283 }
1284
1285 //Folds contained in a hunk are ignored apart from shrinking visual size
1286 //If a fold contains any hunks then that fold line is marked as modified
1287 fn layout_git_gutters(
1288 &self,
1289 display_rows: Range<u32>,
1290 snapshot: &EditorSnapshot,
1291 ) -> Vec<DisplayDiffHunk> {
1292 let buffer_snapshot = &snapshot.buffer_snapshot;
1293
1294 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1295 .to_point(snapshot)
1296 .row;
1297 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1298 .to_point(snapshot)
1299 .row;
1300
1301 buffer_snapshot
1302 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1303 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1304 .dedup()
1305 .collect()
1306 }
1307
1308 fn layout_line_numbers(
1309 &self,
1310 rows: Range<u32>,
1311 active_rows: &BTreeMap<u32, bool>,
1312 is_singleton: bool,
1313 snapshot: &EditorSnapshot,
1314 cx: &ViewContext<Editor>,
1315 ) -> (
1316 Vec<Option<text_layout::Line>>,
1317 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1318 ) {
1319 let style = &self.style;
1320 let include_line_numbers = snapshot.mode == EditorMode::Full;
1321 let mut line_number_layouts = Vec::with_capacity(rows.len());
1322 let mut fold_statuses = Vec::with_capacity(rows.len());
1323 let mut line_number = String::new();
1324 for (ix, row) in snapshot
1325 .buffer_rows(rows.start)
1326 .take((rows.end - rows.start) as usize)
1327 .enumerate()
1328 {
1329 let display_row = rows.start + ix as u32;
1330 let (active, color) = if active_rows.contains_key(&display_row) {
1331 (true, style.line_number_active)
1332 } else {
1333 (false, style.line_number)
1334 };
1335 if let Some(buffer_row) = row {
1336 if include_line_numbers {
1337 line_number.clear();
1338 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1339 line_number_layouts.push(Some(cx.text_layout_cache().layout_str(
1340 &line_number,
1341 style.text.font_size,
1342 &[(
1343 line_number.len(),
1344 RunStyle {
1345 font_id: style.text.font_id,
1346 color,
1347 underline: Default::default(),
1348 },
1349 )],
1350 )));
1351 fold_statuses.push(
1352 is_singleton
1353 .then(|| {
1354 snapshot
1355 .fold_for_line(buffer_row)
1356 .map(|fold_status| (fold_status, buffer_row, active))
1357 })
1358 .flatten(),
1359 )
1360 }
1361 } else {
1362 fold_statuses.push(None);
1363 line_number_layouts.push(None);
1364 }
1365 }
1366
1367 (line_number_layouts, fold_statuses)
1368 }
1369
1370 fn layout_lines(
1371 &mut self,
1372 rows: Range<u32>,
1373 line_number_layouts: &[Option<Line>],
1374 snapshot: &EditorSnapshot,
1375 cx: &ViewContext<Editor>,
1376 ) -> Vec<LineWithInvisibles> {
1377 if rows.start >= rows.end {
1378 return Vec::new();
1379 }
1380
1381 // When the editor is empty and unfocused, then show the placeholder.
1382 if snapshot.is_empty() {
1383 let placeholder_style = self
1384 .style
1385 .placeholder_text
1386 .as_ref()
1387 .unwrap_or(&self.style.text);
1388 let placeholder_text = snapshot.placeholder_text();
1389 let placeholder_lines = placeholder_text
1390 .as_ref()
1391 .map_or("", AsRef::as_ref)
1392 .split('\n')
1393 .skip(rows.start as usize)
1394 .chain(iter::repeat(""))
1395 .take(rows.len());
1396 placeholder_lines
1397 .map(|line| {
1398 cx.text_layout_cache().layout_str(
1399 line,
1400 placeholder_style.font_size,
1401 &[(
1402 line.len(),
1403 RunStyle {
1404 font_id: placeholder_style.font_id,
1405 color: placeholder_style.color,
1406 underline: Default::default(),
1407 },
1408 )],
1409 )
1410 })
1411 .map(|line| LineWithInvisibles {
1412 line,
1413 invisibles: Vec::new(),
1414 })
1415 .collect()
1416 } else {
1417 let style = &self.style;
1418 let chunks = snapshot
1419 .chunks(rows.clone(), true, Some(style.theme.suggestion))
1420 .map(|chunk| {
1421 let mut highlight_style = chunk
1422 .syntax_highlight_id
1423 .and_then(|id| id.style(&style.syntax));
1424
1425 if let Some(chunk_highlight) = chunk.highlight_style {
1426 if let Some(highlight_style) = highlight_style.as_mut() {
1427 highlight_style.highlight(chunk_highlight);
1428 } else {
1429 highlight_style = Some(chunk_highlight);
1430 }
1431 }
1432
1433 let mut diagnostic_highlight = HighlightStyle::default();
1434
1435 if chunk.is_unnecessary {
1436 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1437 }
1438
1439 if let Some(severity) = chunk.diagnostic_severity {
1440 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1441 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1442 let diagnostic_style = super::diagnostic_style(severity, true, style);
1443 diagnostic_highlight.underline = Some(Underline {
1444 color: Some(diagnostic_style.message.text.color),
1445 thickness: 1.0.into(),
1446 squiggly: true,
1447 });
1448 }
1449 }
1450
1451 if let Some(highlight_style) = highlight_style.as_mut() {
1452 highlight_style.highlight(diagnostic_highlight);
1453 } else {
1454 highlight_style = Some(diagnostic_highlight);
1455 }
1456
1457 HighlightedChunk {
1458 chunk: chunk.text,
1459 style: highlight_style,
1460 is_tab: chunk.is_tab,
1461 }
1462 });
1463
1464 LineWithInvisibles::from_chunks(
1465 chunks,
1466 &style.text,
1467 cx.text_layout_cache(),
1468 cx.font_cache(),
1469 MAX_LINE_LEN,
1470 rows.len() as usize,
1471 line_number_layouts,
1472 snapshot.mode,
1473 )
1474 }
1475 }
1476
1477 #[allow(clippy::too_many_arguments)]
1478 fn layout_blocks(
1479 &mut self,
1480 rows: Range<u32>,
1481 snapshot: &EditorSnapshot,
1482 editor_width: f32,
1483 scroll_width: f32,
1484 gutter_padding: f32,
1485 gutter_width: f32,
1486 em_width: f32,
1487 text_x: f32,
1488 line_height: f32,
1489 style: &EditorStyle,
1490 line_layouts: &[LineWithInvisibles],
1491 editor: &mut Editor,
1492 cx: &mut LayoutContext<Editor>,
1493 ) -> (f32, Vec<BlockLayout>) {
1494 let scroll_x = snapshot.scroll_anchor.offset.x();
1495 let (fixed_blocks, non_fixed_blocks) = snapshot
1496 .blocks_in_range(rows.clone())
1497 .partition::<Vec<_>, _>(|(_, block)| match block {
1498 TransformBlock::ExcerptHeader { .. } => false,
1499 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1500 });
1501 let mut render_block = |block: &TransformBlock, width: f32| {
1502 let mut element = match block {
1503 TransformBlock::Custom(block) => {
1504 let align_to = block
1505 .position()
1506 .to_point(&snapshot.buffer_snapshot)
1507 .to_display_point(snapshot);
1508 let anchor_x = text_x
1509 + if rows.contains(&align_to.row()) {
1510 line_layouts[(align_to.row() - rows.start) as usize]
1511 .line
1512 .x_for_index(align_to.column() as usize)
1513 } else {
1514 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache())
1515 .x_for_index(align_to.column() as usize)
1516 };
1517
1518 block.render(&mut BlockContext {
1519 view_context: cx,
1520 anchor_x,
1521 gutter_padding,
1522 line_height,
1523 scroll_x,
1524 gutter_width,
1525 em_width,
1526 })
1527 }
1528 TransformBlock::ExcerptHeader {
1529 id,
1530 buffer,
1531 range,
1532 starts_new_buffer,
1533 ..
1534 } => (self.render_excerpt_header)(
1535 editor,
1536 RenderExcerptHeaderParams {
1537 id: *id,
1538 buffer,
1539 range,
1540 starts_new_buffer: *starts_new_buffer,
1541 gutter_padding,
1542 editor_style: style,
1543 },
1544 cx,
1545 ),
1546 };
1547
1548 element.layout(
1549 SizeConstraint {
1550 min: Vector2F::zero(),
1551 max: vec2f(width, block.height() as f32 * line_height),
1552 },
1553 editor,
1554 cx,
1555 );
1556 element
1557 };
1558
1559 let mut fixed_block_max_width = 0f32;
1560 let mut blocks = Vec::new();
1561 for (row, block) in fixed_blocks {
1562 let element = render_block(block, f32::INFINITY);
1563 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1564 blocks.push(BlockLayout {
1565 row,
1566 element,
1567 style: BlockStyle::Fixed,
1568 });
1569 }
1570 for (row, block) in non_fixed_blocks {
1571 let style = match block {
1572 TransformBlock::Custom(block) => block.style(),
1573 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1574 };
1575 let width = match style {
1576 BlockStyle::Sticky => editor_width,
1577 BlockStyle::Flex => editor_width
1578 .max(fixed_block_max_width)
1579 .max(gutter_width + scroll_width),
1580 BlockStyle::Fixed => unreachable!(),
1581 };
1582 let element = render_block(block, width);
1583 blocks.push(BlockLayout {
1584 row,
1585 element,
1586 style,
1587 });
1588 }
1589 (
1590 scroll_width.max(fixed_block_max_width - gutter_width),
1591 blocks,
1592 )
1593 }
1594}
1595
1596struct HighlightedChunk<'a> {
1597 chunk: &'a str,
1598 style: Option<HighlightStyle>,
1599 is_tab: bool,
1600}
1601
1602#[derive(Debug)]
1603pub struct LineWithInvisibles {
1604 pub line: Line,
1605 invisibles: Vec<Invisible>,
1606}
1607
1608impl LineWithInvisibles {
1609 fn from_chunks<'a>(
1610 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
1611 text_style: &TextStyle,
1612 text_layout_cache: &TextLayoutCache,
1613 font_cache: &Arc<FontCache>,
1614 max_line_len: usize,
1615 max_line_count: usize,
1616 line_number_layouts: &[Option<Line>],
1617 editor_mode: EditorMode,
1618 ) -> Vec<Self> {
1619 let mut layouts = Vec::with_capacity(max_line_count);
1620 let mut line = String::new();
1621 let mut invisibles = Vec::new();
1622 let mut styles = Vec::new();
1623 let mut non_whitespace_added = false;
1624 let mut row = 0;
1625 let mut line_exceeded_max_len = false;
1626 for highlighted_chunk in chunks.chain([HighlightedChunk {
1627 chunk: "\n",
1628 style: None,
1629 is_tab: false,
1630 }]) {
1631 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
1632 if ix > 0 {
1633 layouts.push(Self {
1634 line: text_layout_cache.layout_str(&line, text_style.font_size, &styles),
1635 invisibles: invisibles.drain(..).collect(),
1636 });
1637
1638 line.clear();
1639 styles.clear();
1640 row += 1;
1641 line_exceeded_max_len = false;
1642 non_whitespace_added = false;
1643 if row == max_line_count {
1644 return layouts;
1645 }
1646 }
1647
1648 if !line_chunk.is_empty() && !line_exceeded_max_len {
1649 let text_style = if let Some(style) = highlighted_chunk.style {
1650 text_style
1651 .clone()
1652 .highlight(style, font_cache)
1653 .map(Cow::Owned)
1654 .unwrap_or_else(|_| Cow::Borrowed(text_style))
1655 } else {
1656 Cow::Borrowed(text_style)
1657 };
1658
1659 if line.len() + line_chunk.len() > max_line_len {
1660 let mut chunk_len = max_line_len - line.len();
1661 while !line_chunk.is_char_boundary(chunk_len) {
1662 chunk_len -= 1;
1663 }
1664 line_chunk = &line_chunk[..chunk_len];
1665 line_exceeded_max_len = true;
1666 }
1667
1668 styles.push((
1669 line_chunk.len(),
1670 RunStyle {
1671 font_id: text_style.font_id,
1672 color: text_style.color,
1673 underline: text_style.underline,
1674 },
1675 ));
1676
1677 if editor_mode == EditorMode::Full {
1678 // Line wrap pads its contents with fake whitespaces,
1679 // avoid printing them
1680 let inside_wrapped_string = line_number_layouts
1681 .get(row)
1682 .and_then(|layout| layout.as_ref())
1683 .is_none();
1684 if highlighted_chunk.is_tab {
1685 if non_whitespace_added || !inside_wrapped_string {
1686 invisibles.push(Invisible::Tab {
1687 line_start_offset: line.len(),
1688 });
1689 }
1690 } else {
1691 invisibles.extend(
1692 line_chunk
1693 .chars()
1694 .enumerate()
1695 .filter(|(_, line_char)| {
1696 let is_whitespace = line_char.is_whitespace();
1697 non_whitespace_added |= !is_whitespace;
1698 is_whitespace
1699 && (non_whitespace_added || !inside_wrapped_string)
1700 })
1701 .map(|(whitespace_index, _)| Invisible::Whitespace {
1702 line_offset: line.len() + whitespace_index,
1703 }),
1704 )
1705 }
1706 }
1707
1708 line.push_str(line_chunk);
1709 }
1710 }
1711 }
1712
1713 layouts
1714 }
1715
1716 fn draw(
1717 &self,
1718 layout: &LayoutState,
1719 row: u32,
1720 scroll_top: f32,
1721 scene: &mut SceneBuilder,
1722 content_origin: Vector2F,
1723 scroll_left: f32,
1724 visible_text_bounds: RectF,
1725 whitespace_setting: ShowWhitespaceSetting,
1726 selection_ranges: &[Range<DisplayPoint>],
1727 visible_bounds: RectF,
1728 cx: &mut ViewContext<Editor>,
1729 ) {
1730 let line_height = layout.position_map.line_height;
1731 let line_y = row as f32 * line_height - scroll_top;
1732
1733 self.line.paint(
1734 scene,
1735 content_origin + vec2f(-scroll_left, line_y),
1736 visible_text_bounds,
1737 line_height,
1738 cx,
1739 );
1740
1741 self.draw_invisibles(
1742 &selection_ranges,
1743 layout,
1744 content_origin,
1745 scroll_left,
1746 line_y,
1747 row,
1748 scene,
1749 visible_bounds,
1750 line_height,
1751 whitespace_setting,
1752 cx,
1753 );
1754 }
1755
1756 fn draw_invisibles(
1757 &self,
1758 selection_ranges: &[Range<DisplayPoint>],
1759 layout: &LayoutState,
1760 content_origin: Vector2F,
1761 scroll_left: f32,
1762 line_y: f32,
1763 row: u32,
1764 scene: &mut SceneBuilder,
1765 visible_bounds: RectF,
1766 line_height: f32,
1767 whitespace_setting: ShowWhitespaceSetting,
1768 cx: &mut ViewContext<Editor>,
1769 ) {
1770 let allowed_invisibles_regions = match whitespace_setting {
1771 ShowWhitespaceSetting::None => return,
1772 ShowWhitespaceSetting::Selection => Some(selection_ranges),
1773 ShowWhitespaceSetting::All => None,
1774 };
1775
1776 for invisible in &self.invisibles {
1777 let (&token_offset, invisible_symbol) = match invisible {
1778 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
1779 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
1780 };
1781
1782 let x_offset = self.line.x_for_index(token_offset);
1783 let invisible_offset =
1784 (layout.position_map.em_width - invisible_symbol.width()).max(0.0) / 2.0;
1785 let origin = content_origin + vec2f(-scroll_left + x_offset + invisible_offset, line_y);
1786
1787 if let Some(allowed_regions) = allowed_invisibles_regions {
1788 let invisible_point = DisplayPoint::new(row, token_offset as u32);
1789 if !allowed_regions
1790 .iter()
1791 .any(|region| region.start <= invisible_point && invisible_point < region.end)
1792 {
1793 continue;
1794 }
1795 }
1796 invisible_symbol.paint(scene, origin, visible_bounds, line_height, cx);
1797 }
1798 }
1799}
1800
1801#[derive(Debug, Clone, Copy, PartialEq, Eq)]
1802enum Invisible {
1803 Tab { line_start_offset: usize },
1804 Whitespace { line_offset: usize },
1805}
1806
1807impl Element<Editor> for EditorElement {
1808 type LayoutState = LayoutState;
1809 type PaintState = ();
1810
1811 fn layout(
1812 &mut self,
1813 constraint: SizeConstraint,
1814 editor: &mut Editor,
1815 cx: &mut LayoutContext<Editor>,
1816 ) -> (Vector2F, Self::LayoutState) {
1817 let mut size = constraint.max;
1818 if size.x().is_infinite() {
1819 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1820 }
1821
1822 let snapshot = editor.snapshot(cx);
1823 let style = self.style.clone();
1824 let line_height = style.text.line_height(cx.font_cache());
1825
1826 let gutter_padding;
1827 let gutter_width;
1828 let gutter_margin;
1829 if snapshot.show_gutter {
1830 let em_width = style.text.em_width(cx.font_cache());
1831 gutter_padding = (em_width * style.gutter_padding_factor).round();
1832 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1833 gutter_margin = -style.text.descent(cx.font_cache());
1834 } else {
1835 gutter_padding = 0.0;
1836 gutter_width = 0.0;
1837 gutter_margin = 0.0;
1838 };
1839
1840 let text_width = size.x() - gutter_width;
1841 let em_width = style.text.em_width(cx.font_cache());
1842 let em_advance = style.text.em_advance(cx.font_cache());
1843 let overscroll = vec2f(em_width, 0.);
1844 let snapshot = {
1845 editor.set_visible_line_count(size.y() / line_height);
1846
1847 let editor_width = text_width - gutter_margin - overscroll.x() - em_width;
1848 let wrap_width = match editor.soft_wrap_mode(cx) {
1849 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1850 SoftWrap::EditorWidth => editor_width,
1851 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1852 };
1853
1854 if editor.set_wrap_width(Some(wrap_width), cx) {
1855 editor.snapshot(cx)
1856 } else {
1857 snapshot
1858 }
1859 };
1860
1861 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1862 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1863 size.set_y(
1864 scroll_height
1865 .min(constraint.max_along(Axis::Vertical))
1866 .max(constraint.min_along(Axis::Vertical))
1867 .min(line_height * max_lines as f32),
1868 )
1869 } else if let EditorMode::SingleLine = snapshot.mode {
1870 size.set_y(
1871 line_height
1872 .min(constraint.max_along(Axis::Vertical))
1873 .max(constraint.min_along(Axis::Vertical)),
1874 )
1875 } else if size.y().is_infinite() {
1876 size.set_y(scroll_height);
1877 }
1878 let gutter_size = vec2f(gutter_width, size.y());
1879 let text_size = vec2f(text_width, size.y());
1880
1881 let autoscroll_horizontally = editor.autoscroll_vertically(size.y(), line_height, cx);
1882 let mut snapshot = editor.snapshot(cx);
1883
1884 let scroll_position = snapshot.scroll_position();
1885 // The scroll position is a fractional point, the whole number of which represents
1886 // the top of the window in terms of display rows.
1887 let start_row = scroll_position.y() as u32;
1888 let height_in_lines = size.y() / line_height;
1889 let max_row = snapshot.max_point().row();
1890
1891 // Add 1 to ensure selections bleed off screen
1892 let end_row = 1 + cmp::min(
1893 (scroll_position.y() + height_in_lines).ceil() as u32,
1894 max_row,
1895 );
1896
1897 let start_anchor = if start_row == 0 {
1898 Anchor::min()
1899 } else {
1900 snapshot
1901 .buffer_snapshot
1902 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1903 };
1904 let end_anchor = if end_row > max_row {
1905 Anchor::max()
1906 } else {
1907 snapshot
1908 .buffer_snapshot
1909 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1910 };
1911
1912 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1913 let mut active_rows = BTreeMap::new();
1914 let mut fold_ranges = Vec::new();
1915 let is_singleton = editor.is_singleton(cx);
1916
1917 let highlighted_rows = editor.highlighted_rows();
1918 let theme = theme::current(cx);
1919 let highlighted_ranges = editor.background_highlights_in_range(
1920 start_anchor..end_anchor,
1921 &snapshot.display_snapshot,
1922 theme.as_ref(),
1923 );
1924
1925 fold_ranges.extend(
1926 snapshot
1927 .folds_in_range(start_anchor..end_anchor)
1928 .map(|anchor| {
1929 let start = anchor.start.to_point(&snapshot.buffer_snapshot);
1930 (
1931 start.row,
1932 start.to_display_point(&snapshot.display_snapshot)
1933 ..anchor.end.to_display_point(&snapshot),
1934 )
1935 }),
1936 );
1937
1938 let mut remote_selections = HashMap::default();
1939 for (replica_id, line_mode, cursor_shape, selection) in snapshot
1940 .buffer_snapshot
1941 .remote_selections_in_range(&(start_anchor..end_anchor))
1942 {
1943 // The local selections match the leader's selections.
1944 if Some(replica_id) == editor.leader_replica_id {
1945 continue;
1946 }
1947 remote_selections
1948 .entry(replica_id)
1949 .or_insert(Vec::new())
1950 .push(SelectionLayout::new(
1951 selection,
1952 line_mode,
1953 cursor_shape,
1954 &snapshot.display_snapshot,
1955 ));
1956 }
1957 selections.extend(remote_selections);
1958
1959 if editor.show_local_selections {
1960 let mut local_selections = editor
1961 .selections
1962 .disjoint_in_range(start_anchor..end_anchor, cx);
1963 local_selections.extend(editor.selections.pending(cx));
1964 for selection in &local_selections {
1965 let is_empty = selection.start == selection.end;
1966 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1967 let selection_end = snapshot.next_line_boundary(selection.end).1;
1968 for row in cmp::max(selection_start.row(), start_row)
1969 ..=cmp::min(selection_end.row(), end_row)
1970 {
1971 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1972 *contains_non_empty_selection |= !is_empty;
1973 }
1974 }
1975
1976 // Render the local selections in the leader's color when following.
1977 let local_replica_id = editor
1978 .leader_replica_id
1979 .unwrap_or_else(|| editor.replica_id(cx));
1980
1981 selections.push((
1982 local_replica_id,
1983 local_selections
1984 .into_iter()
1985 .map(|selection| {
1986 SelectionLayout::new(
1987 selection,
1988 editor.selections.line_mode,
1989 editor.cursor_shape,
1990 &snapshot.display_snapshot,
1991 )
1992 })
1993 .collect(),
1994 ));
1995 }
1996
1997 let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
1998 let show_scrollbars = match scrollbar_settings.show {
1999 ShowScrollbar::Auto => {
2000 // Git
2001 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2002 // Scrollmanager
2003 || editor.scroll_manager.scrollbars_visible()
2004 }
2005 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2006 ShowScrollbar::Always => true,
2007 ShowScrollbar::Never => false,
2008 };
2009
2010 let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2011 .into_iter()
2012 .map(|(id, fold)| {
2013 let color = self
2014 .style
2015 .folds
2016 .ellipses
2017 .background
2018 .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize), false)
2019 .color;
2020
2021 (id, fold, color)
2022 })
2023 .collect();
2024
2025 let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2026 start_row..end_row,
2027 &active_rows,
2028 is_singleton,
2029 &snapshot,
2030 cx,
2031 );
2032
2033 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2034
2035 let scrollbar_row_range = scroll_position.y()..(scroll_position.y() + height_in_lines);
2036
2037 let mut max_visible_line_width = 0.0;
2038 let line_layouts =
2039 self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2040 for line_with_invisibles in &line_layouts {
2041 if line_with_invisibles.line.width() > max_visible_line_width {
2042 max_visible_line_width = line_with_invisibles.line.width();
2043 }
2044 }
2045
2046 let style = self.style.clone();
2047 let longest_line_width = layout_line(
2048 snapshot.longest_row(),
2049 &snapshot,
2050 &style,
2051 cx.text_layout_cache(),
2052 )
2053 .width();
2054 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
2055 let em_width = style.text.em_width(cx.font_cache());
2056 let (scroll_width, blocks) = self.layout_blocks(
2057 start_row..end_row,
2058 &snapshot,
2059 size.x(),
2060 scroll_width,
2061 gutter_padding,
2062 gutter_width,
2063 em_width,
2064 gutter_width + gutter_margin,
2065 line_height,
2066 &style,
2067 &line_layouts,
2068 editor,
2069 cx,
2070 );
2071
2072 let scroll_max = vec2f(
2073 ((scroll_width - text_size.x()) / em_width).max(0.0),
2074 max_row as f32,
2075 );
2076
2077 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x());
2078
2079 let autoscrolled = if autoscroll_horizontally {
2080 editor.autoscroll_horizontally(
2081 start_row,
2082 text_size.x(),
2083 scroll_width,
2084 em_width,
2085 &line_layouts,
2086 cx,
2087 )
2088 } else {
2089 false
2090 };
2091
2092 if clamped || autoscrolled {
2093 snapshot = editor.snapshot(cx);
2094 }
2095
2096 let newest_selection_head = editor
2097 .selections
2098 .newest::<usize>(cx)
2099 .head()
2100 .to_display_point(&snapshot);
2101 let style = editor.style(cx);
2102
2103 let mut context_menu = None;
2104 let mut code_actions_indicator = None;
2105 if (start_row..end_row).contains(&newest_selection_head.row()) {
2106 if editor.context_menu_visible() {
2107 context_menu = editor.render_context_menu(newest_selection_head, style.clone(), cx);
2108 }
2109
2110 let active = matches!(
2111 editor.context_menu,
2112 Some(crate::ContextMenu::CodeActions(_))
2113 );
2114
2115 code_actions_indicator = editor
2116 .render_code_actions_indicator(&style, active, cx)
2117 .map(|indicator| (newest_selection_head.row(), indicator));
2118 }
2119
2120 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2121 let mut hover = editor
2122 .hover_state
2123 .render(&snapshot, &style, visible_rows, cx);
2124 let mode = editor.mode;
2125
2126 let mut fold_indicators = editor.render_fold_indicators(
2127 fold_statuses,
2128 &style,
2129 editor.gutter_hovered,
2130 line_height,
2131 gutter_margin,
2132 cx,
2133 );
2134
2135 if let Some((_, context_menu)) = context_menu.as_mut() {
2136 context_menu.layout(
2137 SizeConstraint {
2138 min: Vector2F::zero(),
2139 max: vec2f(
2140 cx.window_size().x() * 0.7,
2141 (12. * line_height).min((size.y() - line_height) / 2.),
2142 ),
2143 },
2144 editor,
2145 cx,
2146 );
2147 }
2148
2149 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
2150 indicator.layout(
2151 SizeConstraint::strict_along(
2152 Axis::Vertical,
2153 line_height * style.code_actions.vertical_scale,
2154 ),
2155 editor,
2156 cx,
2157 );
2158 }
2159
2160 for fold_indicator in fold_indicators.iter_mut() {
2161 if let Some(indicator) = fold_indicator.as_mut() {
2162 indicator.layout(
2163 SizeConstraint::strict_along(
2164 Axis::Vertical,
2165 line_height * style.code_actions.vertical_scale,
2166 ),
2167 editor,
2168 cx,
2169 );
2170 }
2171 }
2172
2173 if let Some((_, hover_popovers)) = hover.as_mut() {
2174 for hover_popover in hover_popovers.iter_mut() {
2175 hover_popover.layout(
2176 SizeConstraint {
2177 min: Vector2F::zero(),
2178 max: vec2f(
2179 (120. * em_width) // Default size
2180 .min(size.x() / 2.) // Shrink to half of the editor width
2181 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2182 (16. * line_height) // Default size
2183 .min(size.y() / 2.) // Shrink to half of the editor height
2184 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2185 ),
2186 },
2187 editor,
2188 cx,
2189 );
2190 }
2191 }
2192
2193 let invisible_symbol_font_size = self.style.text.font_size / 2.0;
2194 let invisible_symbol_style = RunStyle {
2195 color: self.style.whitespace,
2196 font_id: self.style.text.font_id,
2197 underline: Default::default(),
2198 };
2199
2200 (
2201 size,
2202 LayoutState {
2203 mode,
2204 position_map: Arc::new(PositionMap {
2205 size,
2206 scroll_max,
2207 line_layouts,
2208 line_height,
2209 em_width,
2210 em_advance,
2211 snapshot,
2212 }),
2213 visible_display_row_range: start_row..end_row,
2214 gutter_size,
2215 gutter_padding,
2216 text_size,
2217 scrollbar_row_range,
2218 show_scrollbars,
2219 is_singleton,
2220 max_row,
2221 gutter_margin,
2222 active_rows,
2223 highlighted_rows,
2224 highlighted_ranges,
2225 fold_ranges,
2226 line_number_layouts,
2227 display_hunks,
2228 blocks,
2229 selections,
2230 context_menu,
2231 code_actions_indicator,
2232 fold_indicators,
2233 tab_invisible: cx.text_layout_cache().layout_str(
2234 "→",
2235 invisible_symbol_font_size,
2236 &[("→".len(), invisible_symbol_style)],
2237 ),
2238 space_invisible: cx.text_layout_cache().layout_str(
2239 "•",
2240 invisible_symbol_font_size,
2241 &[("•".len(), invisible_symbol_style)],
2242 ),
2243 hover_popovers: hover,
2244 },
2245 )
2246 }
2247
2248 fn paint(
2249 &mut self,
2250 scene: &mut SceneBuilder,
2251 bounds: RectF,
2252 visible_bounds: RectF,
2253 layout: &mut Self::LayoutState,
2254 editor: &mut Editor,
2255 cx: &mut ViewContext<Editor>,
2256 ) -> Self::PaintState {
2257 let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
2258 scene.push_layer(Some(visible_bounds));
2259
2260 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
2261 let text_bounds = RectF::new(
2262 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2263 layout.text_size,
2264 );
2265
2266 Self::attach_mouse_handlers(
2267 scene,
2268 &layout.position_map,
2269 layout.hover_popovers.is_some(),
2270 visible_bounds,
2271 text_bounds,
2272 gutter_bounds,
2273 bounds,
2274 cx,
2275 );
2276
2277 self.paint_background(scene, gutter_bounds, text_bounds, layout);
2278 if layout.gutter_size.x() > 0. {
2279 self.paint_gutter(scene, gutter_bounds, visible_bounds, layout, editor, cx);
2280 }
2281 self.paint_text(scene, text_bounds, visible_bounds, layout, editor, cx);
2282
2283 scene.push_layer(Some(bounds));
2284 if !layout.blocks.is_empty() {
2285 self.paint_blocks(scene, bounds, visible_bounds, layout, editor, cx);
2286 }
2287 self.paint_scrollbar(scene, bounds, layout, cx);
2288 scene.pop_layer();
2289
2290 scene.pop_layer();
2291 }
2292
2293 fn rect_for_text_range(
2294 &self,
2295 range_utf16: Range<usize>,
2296 bounds: RectF,
2297 _: RectF,
2298 layout: &Self::LayoutState,
2299 _: &Self::PaintState,
2300 _: &Editor,
2301 _: &ViewContext<Editor>,
2302 ) -> Option<RectF> {
2303 let text_bounds = RectF::new(
2304 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
2305 layout.text_size,
2306 );
2307 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
2308 let scroll_position = layout.position_map.snapshot.scroll_position();
2309 let start_row = scroll_position.y() as u32;
2310 let scroll_top = scroll_position.y() * layout.position_map.line_height;
2311 let scroll_left = scroll_position.x() * layout.position_map.em_width;
2312
2313 let range_start = OffsetUtf16(range_utf16.start)
2314 .to_display_point(&layout.position_map.snapshot.display_snapshot);
2315 if range_start.row() < start_row {
2316 return None;
2317 }
2318
2319 let line = &layout
2320 .position_map
2321 .line_layouts
2322 .get((range_start.row() - start_row) as usize)?
2323 .line;
2324 let range_start_x = line.x_for_index(range_start.column() as usize);
2325 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
2326 Some(RectF::new(
2327 content_origin
2328 + vec2f(
2329 range_start_x,
2330 range_start_y + layout.position_map.line_height,
2331 )
2332 - vec2f(scroll_left, scroll_top),
2333 vec2f(
2334 layout.position_map.em_width,
2335 layout.position_map.line_height,
2336 ),
2337 ))
2338 }
2339
2340 fn debug(
2341 &self,
2342 bounds: RectF,
2343 _: &Self::LayoutState,
2344 _: &Self::PaintState,
2345 _: &Editor,
2346 _: &ViewContext<Editor>,
2347 ) -> json::Value {
2348 json!({
2349 "type": "BufferElement",
2350 "bounds": bounds.to_json()
2351 })
2352 }
2353}
2354
2355type BufferRow = u32;
2356
2357pub struct LayoutState {
2358 position_map: Arc<PositionMap>,
2359 gutter_size: Vector2F,
2360 gutter_padding: f32,
2361 gutter_margin: f32,
2362 text_size: Vector2F,
2363 mode: EditorMode,
2364 visible_display_row_range: Range<u32>,
2365 active_rows: BTreeMap<u32, bool>,
2366 highlighted_rows: Option<Range<u32>>,
2367 line_number_layouts: Vec<Option<text_layout::Line>>,
2368 display_hunks: Vec<DisplayDiffHunk>,
2369 blocks: Vec<BlockLayout>,
2370 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
2371 fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)>,
2372 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
2373 scrollbar_row_range: Range<f32>,
2374 show_scrollbars: bool,
2375 is_singleton: bool,
2376 max_row: u32,
2377 context_menu: Option<(DisplayPoint, AnyElement<Editor>)>,
2378 code_actions_indicator: Option<(u32, AnyElement<Editor>)>,
2379 hover_popovers: Option<(DisplayPoint, Vec<AnyElement<Editor>>)>,
2380 fold_indicators: Vec<Option<AnyElement<Editor>>>,
2381 tab_invisible: Line,
2382 space_invisible: Line,
2383}
2384
2385struct PositionMap {
2386 size: Vector2F,
2387 line_height: f32,
2388 scroll_max: Vector2F,
2389 em_width: f32,
2390 em_advance: f32,
2391 line_layouts: Vec<LineWithInvisibles>,
2392 snapshot: EditorSnapshot,
2393}
2394
2395impl PositionMap {
2396 /// Returns two display points:
2397 /// 1. The nearest *valid* position in the editor
2398 /// 2. An unclipped, potentially *invalid* position that maps directly to
2399 /// the given pixel position.
2400 fn point_for_position(
2401 &self,
2402 text_bounds: RectF,
2403 position: Vector2F,
2404 ) -> (DisplayPoint, DisplayPoint) {
2405 let scroll_position = self.snapshot.scroll_position();
2406 let position = position - text_bounds.origin();
2407 let y = position.y().max(0.0).min(self.size.y());
2408 let x = position.x() + (scroll_position.x() * self.em_width);
2409 let row = (y / self.line_height + scroll_position.y()) as u32;
2410 let (column, x_overshoot) = if let Some(line) = self
2411 .line_layouts
2412 .get(row as usize - scroll_position.y() as usize)
2413 .map(|line_with_spaces| &line_with_spaces.line)
2414 {
2415 if let Some(ix) = line.index_for_x(x) {
2416 (ix as u32, 0.0)
2417 } else {
2418 (line.len() as u32, 0f32.max(x - line.width()))
2419 }
2420 } else {
2421 (0, x)
2422 };
2423
2424 let mut target_point = DisplayPoint::new(row, column);
2425 let point = self.snapshot.clip_point(target_point, Bias::Left);
2426 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
2427
2428 (point, target_point)
2429 }
2430}
2431
2432struct BlockLayout {
2433 row: u32,
2434 element: AnyElement<Editor>,
2435 style: BlockStyle,
2436}
2437
2438fn layout_line(
2439 row: u32,
2440 snapshot: &EditorSnapshot,
2441 style: &EditorStyle,
2442 layout_cache: &TextLayoutCache,
2443) -> text_layout::Line {
2444 let mut line = snapshot.line(row);
2445
2446 if line.len() > MAX_LINE_LEN {
2447 let mut len = MAX_LINE_LEN;
2448 while !line.is_char_boundary(len) {
2449 len -= 1;
2450 }
2451
2452 line.truncate(len);
2453 }
2454
2455 layout_cache.layout_str(
2456 &line,
2457 style.text.font_size,
2458 &[(
2459 snapshot.line_len(row) as usize,
2460 RunStyle {
2461 font_id: style.text.font_id,
2462 color: Color::black(),
2463 underline: Default::default(),
2464 },
2465 )],
2466 )
2467}
2468
2469#[derive(Debug)]
2470pub struct Cursor {
2471 origin: Vector2F,
2472 block_width: f32,
2473 line_height: f32,
2474 color: Color,
2475 shape: CursorShape,
2476 block_text: Option<Line>,
2477}
2478
2479impl Cursor {
2480 pub fn new(
2481 origin: Vector2F,
2482 block_width: f32,
2483 line_height: f32,
2484 color: Color,
2485 shape: CursorShape,
2486 block_text: Option<Line>,
2487 ) -> Cursor {
2488 Cursor {
2489 origin,
2490 block_width,
2491 line_height,
2492 color,
2493 shape,
2494 block_text,
2495 }
2496 }
2497
2498 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2499 RectF::new(
2500 self.origin + origin,
2501 vec2f(self.block_width, self.line_height),
2502 )
2503 }
2504
2505 pub fn paint(&self, scene: &mut SceneBuilder, origin: Vector2F, cx: &mut WindowContext) {
2506 let bounds = match self.shape {
2507 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2508 CursorShape::Block | CursorShape::Hollow => RectF::new(
2509 self.origin + origin,
2510 vec2f(self.block_width, self.line_height),
2511 ),
2512 CursorShape::Underscore => RectF::new(
2513 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2514 vec2f(self.block_width, 2.0),
2515 ),
2516 };
2517
2518 //Draw background or border quad
2519 if matches!(self.shape, CursorShape::Hollow) {
2520 scene.push_quad(Quad {
2521 bounds,
2522 background: None,
2523 border: Border::all(1., self.color),
2524 corner_radius: 0.,
2525 });
2526 } else {
2527 scene.push_quad(Quad {
2528 bounds,
2529 background: Some(self.color),
2530 border: Default::default(),
2531 corner_radius: 0.,
2532 });
2533 }
2534
2535 if let Some(block_text) = &self.block_text {
2536 block_text.paint(scene, self.origin + origin, bounds, self.line_height, cx);
2537 }
2538 }
2539
2540 pub fn shape(&self) -> CursorShape {
2541 self.shape
2542 }
2543}
2544
2545#[derive(Debug)]
2546pub struct HighlightedRange {
2547 pub start_y: f32,
2548 pub line_height: f32,
2549 pub lines: Vec<HighlightedRangeLine>,
2550 pub color: Color,
2551 pub corner_radius: f32,
2552}
2553
2554#[derive(Debug)]
2555pub struct HighlightedRangeLine {
2556 pub start_x: f32,
2557 pub end_x: f32,
2558}
2559
2560impl HighlightedRange {
2561 pub fn paint(&self, bounds: RectF, scene: &mut SceneBuilder) {
2562 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2563 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2564 self.paint_lines(
2565 self.start_y + self.line_height,
2566 &self.lines[1..],
2567 bounds,
2568 scene,
2569 );
2570 } else {
2571 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2572 }
2573 }
2574
2575 fn paint_lines(
2576 &self,
2577 start_y: f32,
2578 lines: &[HighlightedRangeLine],
2579 bounds: RectF,
2580 scene: &mut SceneBuilder,
2581 ) {
2582 if lines.is_empty() {
2583 return;
2584 }
2585
2586 let mut path = PathBuilder::new();
2587 let first_line = lines.first().unwrap();
2588 let last_line = lines.last().unwrap();
2589
2590 let first_top_left = vec2f(first_line.start_x, start_y);
2591 let first_top_right = vec2f(first_line.end_x, start_y);
2592
2593 let curve_height = vec2f(0., self.corner_radius);
2594 let curve_width = |start_x: f32, end_x: f32| {
2595 let max = (end_x - start_x) / 2.;
2596 let width = if max < self.corner_radius {
2597 max
2598 } else {
2599 self.corner_radius
2600 };
2601
2602 vec2f(width, 0.)
2603 };
2604
2605 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2606 path.reset(first_top_right - top_curve_width);
2607 path.curve_to(first_top_right + curve_height, first_top_right);
2608
2609 let mut iter = lines.iter().enumerate().peekable();
2610 while let Some((ix, line)) = iter.next() {
2611 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2612
2613 if let Some((_, next_line)) = iter.peek() {
2614 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2615
2616 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2617 Ordering::Equal => {
2618 path.line_to(bottom_right);
2619 }
2620 Ordering::Less => {
2621 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2622 path.line_to(bottom_right - curve_height);
2623 if self.corner_radius > 0. {
2624 path.curve_to(bottom_right - curve_width, bottom_right);
2625 }
2626 path.line_to(next_top_right + curve_width);
2627 if self.corner_radius > 0. {
2628 path.curve_to(next_top_right + curve_height, next_top_right);
2629 }
2630 }
2631 Ordering::Greater => {
2632 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2633 path.line_to(bottom_right - curve_height);
2634 if self.corner_radius > 0. {
2635 path.curve_to(bottom_right + curve_width, bottom_right);
2636 }
2637 path.line_to(next_top_right - curve_width);
2638 if self.corner_radius > 0. {
2639 path.curve_to(next_top_right + curve_height, next_top_right);
2640 }
2641 }
2642 }
2643 } else {
2644 let curve_width = curve_width(line.start_x, line.end_x);
2645 path.line_to(bottom_right - curve_height);
2646 if self.corner_radius > 0. {
2647 path.curve_to(bottom_right - curve_width, bottom_right);
2648 }
2649
2650 let bottom_left = vec2f(line.start_x, bottom_right.y());
2651 path.line_to(bottom_left + curve_width);
2652 if self.corner_radius > 0. {
2653 path.curve_to(bottom_left - curve_height, bottom_left);
2654 }
2655 }
2656 }
2657
2658 if first_line.start_x > last_line.start_x {
2659 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2660 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2661 path.line_to(second_top_left + curve_height);
2662 if self.corner_radius > 0. {
2663 path.curve_to(second_top_left + curve_width, second_top_left);
2664 }
2665 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2666 path.line_to(first_bottom_left - curve_width);
2667 if self.corner_radius > 0. {
2668 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2669 }
2670 }
2671
2672 path.line_to(first_top_left + curve_height);
2673 if self.corner_radius > 0. {
2674 path.curve_to(first_top_left + top_curve_width, first_top_left);
2675 }
2676 path.line_to(first_top_right - top_curve_width);
2677
2678 scene.push_path(path.build(self.color, Some(bounds)));
2679 }
2680}
2681
2682fn render_excerpt_header(
2683 editor: &mut Editor,
2684 RenderExcerptHeaderParams {
2685 id,
2686 buffer,
2687 range,
2688 starts_new_buffer,
2689 gutter_padding,
2690 editor_style,
2691 }: RenderExcerptHeaderParams,
2692 cx: &mut LayoutContext<Editor>,
2693) -> AnyElement<Editor> {
2694 let tooltip_style = theme::current(cx).tooltip.clone();
2695 let include_root = editor
2696 .project
2697 .as_ref()
2698 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2699 .unwrap_or_default();
2700 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
2701 let jump_path = ProjectPath {
2702 worktree_id: file.worktree_id(cx),
2703 path: file.path.clone(),
2704 };
2705 let jump_anchor = range
2706 .primary
2707 .as_ref()
2708 .map_or(range.context.start, |primary| primary.start);
2709 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2710
2711 enum JumpIcon {}
2712 MouseEventHandler::<JumpIcon, _>::new(id.into(), cx, |state, _| {
2713 let style = editor_style.jump_icon.style_for(state, false);
2714 Svg::new("icons/arrow_up_right_8.svg")
2715 .with_color(style.color)
2716 .constrained()
2717 .with_width(style.icon_width)
2718 .aligned()
2719 .contained()
2720 .with_style(style.container)
2721 .constrained()
2722 .with_width(style.button_width)
2723 .with_height(style.button_width)
2724 })
2725 .with_cursor_style(CursorStyle::PointingHand)
2726 .on_click(MouseButton::Left, move |_, editor, cx| {
2727 if let Some(workspace) = editor
2728 .workspace
2729 .as_ref()
2730 .and_then(|(workspace, _)| workspace.upgrade(cx))
2731 {
2732 workspace.update(cx, |workspace, cx| {
2733 Editor::jump(workspace, jump_path.clone(), jump_position, jump_anchor, cx);
2734 });
2735 }
2736 })
2737 .with_tooltip::<JumpIcon>(
2738 id.into(),
2739 "Jump to Buffer".to_string(),
2740 Some(Box::new(crate::OpenExcerpts)),
2741 tooltip_style.clone(),
2742 cx,
2743 )
2744 .aligned()
2745 .flex_float()
2746 });
2747
2748 if starts_new_buffer {
2749 let style = &editor_style.diagnostic_path_header;
2750 let font_size = (style.text_scale_factor * editor_style.text.font_size).round();
2751
2752 let path = buffer.resolve_file_path(cx, include_root);
2753 let mut filename = None;
2754 let mut parent_path = None;
2755 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2756 if let Some(path) = path {
2757 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2758 parent_path = path.parent().map(|p| p.to_string_lossy().to_string() + "/");
2759 }
2760
2761 Flex::row()
2762 .with_child(
2763 Label::new(
2764 filename.unwrap_or_else(|| "untitled".to_string()),
2765 style.filename.text.clone().with_font_size(font_size),
2766 )
2767 .contained()
2768 .with_style(style.filename.container)
2769 .aligned(),
2770 )
2771 .with_children(parent_path.map(|path| {
2772 Label::new(path, style.path.text.clone().with_font_size(font_size))
2773 .contained()
2774 .with_style(style.path.container)
2775 .aligned()
2776 }))
2777 .with_children(jump_icon)
2778 .contained()
2779 .with_style(style.container)
2780 .with_padding_left(gutter_padding)
2781 .with_padding_right(gutter_padding)
2782 .expanded()
2783 .into_any_named("path header block")
2784 } else {
2785 let text_style = editor_style.text.clone();
2786 Flex::row()
2787 .with_child(Label::new("⋯", text_style))
2788 .with_children(jump_icon)
2789 .contained()
2790 .with_padding_left(gutter_padding)
2791 .with_padding_right(gutter_padding)
2792 .expanded()
2793 .into_any_named("collapsed context")
2794 }
2795}
2796
2797fn position_to_display_point(
2798 position: Vector2F,
2799 text_bounds: RectF,
2800 position_map: &PositionMap,
2801) -> Option<DisplayPoint> {
2802 if text_bounds.contains_point(position) {
2803 let (point, target_point) = position_map.point_for_position(text_bounds, position);
2804 if point == target_point {
2805 Some(point)
2806 } else {
2807 None
2808 }
2809 } else {
2810 None
2811 }
2812}
2813
2814fn range_to_bounds(
2815 range: &Range<DisplayPoint>,
2816 content_origin: Vector2F,
2817 scroll_left: f32,
2818 scroll_top: f32,
2819 visible_row_range: &Range<u32>,
2820 line_end_overshoot: f32,
2821 position_map: &PositionMap,
2822) -> impl Iterator<Item = RectF> {
2823 let mut bounds: SmallVec<[RectF; 1]> = SmallVec::new();
2824
2825 if range.start == range.end {
2826 return bounds.into_iter();
2827 }
2828
2829 let start_row = visible_row_range.start;
2830 let end_row = visible_row_range.end;
2831
2832 let row_range = if range.end.column() == 0 {
2833 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
2834 } else {
2835 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
2836 };
2837
2838 let first_y =
2839 content_origin.y() + row_range.start as f32 * position_map.line_height - scroll_top;
2840
2841 for (idx, row) in row_range.enumerate() {
2842 let line_layout = &position_map.line_layouts[(row - start_row) as usize].line;
2843
2844 let start_x = if row == range.start.row() {
2845 content_origin.x() + line_layout.x_for_index(range.start.column() as usize)
2846 - scroll_left
2847 } else {
2848 content_origin.x() - scroll_left
2849 };
2850
2851 let end_x = if row == range.end.row() {
2852 content_origin.x() + line_layout.x_for_index(range.end.column() as usize) - scroll_left
2853 } else {
2854 content_origin.x() + line_layout.width() + line_end_overshoot - scroll_left
2855 };
2856
2857 bounds.push(RectF::from_points(
2858 vec2f(start_x, first_y + position_map.line_height * idx as f32),
2859 vec2f(end_x, first_y + position_map.line_height * (idx + 1) as f32),
2860 ))
2861 }
2862
2863 bounds.into_iter()
2864}
2865
2866pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2867 delta.powf(1.5) / 100.0
2868}
2869
2870fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2871 delta.powf(1.2) / 300.0
2872}
2873
2874#[cfg(test)]
2875mod tests {
2876 use super::*;
2877 use crate::{
2878 display_map::{BlockDisposition, BlockProperties},
2879 editor_tests::{init_test, update_test_settings},
2880 Editor, MultiBuffer,
2881 };
2882 use gpui::TestAppContext;
2883 use language::language_settings;
2884 use log::info;
2885 use std::{num::NonZeroU32, sync::Arc};
2886 use util::test::sample_text;
2887
2888 #[gpui::test]
2889 fn test_layout_line_numbers(cx: &mut TestAppContext) {
2890 init_test(cx, |_| {});
2891
2892 let (_, editor) = cx.add_window(|cx| {
2893 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2894 Editor::new(EditorMode::Full, buffer, None, None, cx)
2895 });
2896 let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2897
2898 let layouts = editor.update(cx, |editor, cx| {
2899 let snapshot = editor.snapshot(cx);
2900 element
2901 .layout_line_numbers(0..6, &Default::default(), false, &snapshot, cx)
2902 .0
2903 });
2904 assert_eq!(layouts.len(), 6);
2905 }
2906
2907 #[gpui::test]
2908 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
2909 init_test(cx, |_| {});
2910
2911 let (_, editor) = cx.add_window(|cx| {
2912 let buffer = MultiBuffer::build_simple("", cx);
2913 Editor::new(EditorMode::Full, buffer, None, None, cx)
2914 });
2915
2916 editor.update(cx, |editor, cx| {
2917 editor.set_placeholder_text("hello", cx);
2918 editor.insert_blocks(
2919 [BlockProperties {
2920 style: BlockStyle::Fixed,
2921 disposition: BlockDisposition::Above,
2922 height: 3,
2923 position: Anchor::min(),
2924 render: Arc::new(|_| Empty::new().into_any()),
2925 }],
2926 cx,
2927 );
2928
2929 // Blur the editor so that it displays placeholder text.
2930 cx.blur();
2931 });
2932
2933 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
2934 let (size, mut state) = editor.update(cx, |editor, cx| {
2935 let mut new_parents = Default::default();
2936 let mut notify_views_if_parents_change = Default::default();
2937 let mut layout_cx = LayoutContext::new(
2938 cx,
2939 &mut new_parents,
2940 &mut notify_views_if_parents_change,
2941 false,
2942 );
2943 element.layout(
2944 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2945 editor,
2946 &mut layout_cx,
2947 )
2948 });
2949
2950 assert_eq!(state.position_map.line_layouts.len(), 4);
2951 assert_eq!(
2952 state
2953 .line_number_layouts
2954 .iter()
2955 .map(Option::is_some)
2956 .collect::<Vec<_>>(),
2957 &[false, false, false, true]
2958 );
2959
2960 // Don't panic.
2961 let mut scene = SceneBuilder::new(1.0);
2962 let bounds = RectF::new(Default::default(), size);
2963 editor.update(cx, |editor, cx| {
2964 element.paint(&mut scene, bounds, bounds, &mut state, editor, cx);
2965 });
2966 }
2967
2968 #[gpui::test]
2969 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
2970 const TAB_SIZE: u32 = 4;
2971
2972 let input_text = "\t \t|\t| a b";
2973 let expected_invisibles = vec![
2974 Invisible::Tab {
2975 line_start_offset: 0,
2976 },
2977 Invisible::Whitespace {
2978 line_offset: TAB_SIZE as usize,
2979 },
2980 Invisible::Tab {
2981 line_start_offset: TAB_SIZE as usize + 1,
2982 },
2983 Invisible::Tab {
2984 line_start_offset: TAB_SIZE as usize * 2 + 1,
2985 },
2986 Invisible::Whitespace {
2987 line_offset: TAB_SIZE as usize * 3 + 1,
2988 },
2989 Invisible::Whitespace {
2990 line_offset: TAB_SIZE as usize * 3 + 3,
2991 },
2992 ];
2993 assert_eq!(
2994 expected_invisibles.len(),
2995 input_text
2996 .chars()
2997 .filter(|initial_char| initial_char.is_whitespace())
2998 .count(),
2999 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3000 );
3001
3002 init_test(cx, |s| {
3003 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3004 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3005 });
3006
3007 let actual_invisibles =
3008 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3009
3010 assert_eq!(expected_invisibles, actual_invisibles);
3011 }
3012
3013 #[gpui::test]
3014 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3015 init_test(cx, |s| {
3016 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3017 s.defaults.tab_size = NonZeroU32::new(4);
3018 });
3019
3020 for editor_mode_without_invisibles in [
3021 EditorMode::SingleLine,
3022 EditorMode::AutoHeight { max_lines: 100 },
3023 ] {
3024 let invisibles = collect_invisibles_from_new_editor(
3025 cx,
3026 editor_mode_without_invisibles,
3027 "\t\t\t| | a b",
3028 500.0,
3029 );
3030 assert!(invisibles.is_empty(),
3031 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3032 }
3033 }
3034
3035 #[gpui::test]
3036 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3037 let tab_size = 4;
3038 let input_text = "a\tbcd ".repeat(9);
3039 let repeated_invisibles = [
3040 Invisible::Tab {
3041 line_start_offset: 1,
3042 },
3043 Invisible::Whitespace {
3044 line_offset: tab_size as usize + 3,
3045 },
3046 Invisible::Whitespace {
3047 line_offset: tab_size as usize + 4,
3048 },
3049 Invisible::Whitespace {
3050 line_offset: tab_size as usize + 5,
3051 },
3052 ];
3053 let expected_invisibles = std::iter::once(repeated_invisibles)
3054 .cycle()
3055 .take(9)
3056 .flatten()
3057 .collect::<Vec<_>>();
3058 assert_eq!(
3059 expected_invisibles.len(),
3060 input_text
3061 .chars()
3062 .filter(|initial_char| initial_char.is_whitespace())
3063 .count(),
3064 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3065 );
3066 info!("Expected invisibles: {expected_invisibles:?}");
3067
3068 init_test(cx, |_| {});
3069
3070 // Put the same string with repeating whitespace pattern into editors of various size,
3071 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3072 let resize_step = 10.0;
3073 let mut editor_width = 200.0;
3074 while editor_width <= 1000.0 {
3075 update_test_settings(cx, |s| {
3076 s.defaults.tab_size = NonZeroU32::new(tab_size);
3077 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3078 s.defaults.preferred_line_length = Some(editor_width as u32);
3079 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3080 });
3081
3082 let actual_invisibles =
3083 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
3084
3085 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3086 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3087 let mut i = 0;
3088 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3089 i = actual_index;
3090 match expected_invisibles.get(i) {
3091 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3092 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3093 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3094 _ => {
3095 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3096 }
3097 },
3098 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3099 }
3100 }
3101 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3102 assert!(
3103 missing_expected_invisibles.is_empty(),
3104 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3105 );
3106
3107 editor_width += resize_step;
3108 }
3109 }
3110
3111 fn collect_invisibles_from_new_editor(
3112 cx: &mut TestAppContext,
3113 editor_mode: EditorMode,
3114 input_text: &str,
3115 editor_width: f32,
3116 ) -> Vec<Invisible> {
3117 info!(
3118 "Creating editor with mode {editor_mode:?}, witdh {editor_width} and text '{input_text}'"
3119 );
3120 let (_, editor) = cx.add_window(|cx| {
3121 let buffer = MultiBuffer::build_simple(&input_text, cx);
3122 Editor::new(editor_mode, buffer, None, None, cx)
3123 });
3124
3125 let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3126 let (_, layout_state) = editor.update(cx, |editor, cx| {
3127 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3128 editor.set_wrap_width(Some(editor_width), cx);
3129
3130 let mut new_parents = Default::default();
3131 let mut notify_views_if_parents_change = Default::default();
3132 let mut layout_cx = LayoutContext::new(
3133 cx,
3134 &mut new_parents,
3135 &mut notify_views_if_parents_change,
3136 false,
3137 );
3138 element.layout(
3139 SizeConstraint::new(vec2f(editor_width, 500.), vec2f(editor_width, 500.)),
3140 editor,
3141 &mut layout_cx,
3142 )
3143 });
3144
3145 layout_state
3146 .position_map
3147 .line_layouts
3148 .iter()
3149 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3150 .flatten()
3151 .cloned()
3152 .collect()
3153 }
3154}