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