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