1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, Scroll, Select, SelectPhase,
4 SoftWrap, ToPoint, MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{BlockStyle, DisplaySnapshot, TransformBlock},
8 hover_popover::{
9 HoverAt, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 link_go_to_definition::{
12 CmdShiftChanged, GoToFetchedDefinition, GoToFetchedTypeDefinition, UpdateGoToDefinitionLink,
13 },
14 mouse_context_menu::DeployMouseContextMenu,
15 EditorStyle,
16};
17use clock::ReplicaId;
18use collections::{BTreeMap, HashMap};
19use git::diff::{DiffHunk, DiffHunkStatus};
20use gpui::{
21 color::Color,
22 elements::*,
23 fonts::{HighlightStyle, Underline},
24 geometry::{
25 rect::RectF,
26 vector::{vec2f, Vector2F},
27 PathBuilder,
28 },
29 json::{self, ToJson},
30 platform::CursorStyle,
31 text_layout::{self, Line, RunStyle, TextLayoutCache},
32 AppContext, Axis, Border, CursorRegion, Element, ElementBox, Event, EventContext,
33 LayoutContext, ModifiersChangedEvent, MouseButton, MouseButtonEvent, MouseMovedEvent,
34 MouseRegion, MutableAppContext, PaintContext, Quad, Scene, SizeConstraint, ViewContext,
35 WeakViewHandle,
36};
37use json::json;
38use language::{Bias, DiagnosticSeverity, OffsetUtf16, Selection};
39use project::ProjectPath;
40use settings::Settings;
41use smallvec::SmallVec;
42use std::{
43 cmp::{self, Ordering},
44 fmt::Write,
45 iter,
46 ops::Range,
47 sync::Arc,
48};
49use theme::DiffStyle;
50
51struct SelectionLayout {
52 head: DisplayPoint,
53 range: Range<DisplayPoint>,
54}
55
56impl SelectionLayout {
57 fn new<T: ToPoint + ToDisplayPoint + Clone>(
58 selection: Selection<T>,
59 line_mode: bool,
60 map: &DisplaySnapshot,
61 ) -> Self {
62 if line_mode {
63 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
64 let point_range = map.expand_to_line(selection.range());
65 Self {
66 head: selection.head().to_display_point(map),
67 range: point_range.start.to_display_point(map)
68 ..point_range.end.to_display_point(map),
69 }
70 } else {
71 let selection = selection.map(|p| p.to_display_point(map));
72 Self {
73 head: selection.head(),
74 range: selection.range(),
75 }
76 }
77 }
78}
79
80#[derive(Clone)]
81pub struct EditorElement {
82 view: WeakViewHandle<Editor>,
83 style: Arc<EditorStyle>,
84 cursor_shape: CursorShape,
85}
86
87impl EditorElement {
88 pub fn new(
89 view: WeakViewHandle<Editor>,
90 style: EditorStyle,
91 cursor_shape: CursorShape,
92 ) -> Self {
93 Self {
94 view,
95 style: Arc::new(style),
96 cursor_shape,
97 }
98 }
99
100 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
101 self.view.upgrade(cx).unwrap().read(cx)
102 }
103
104 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
105 where
106 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
107 {
108 self.view.upgrade(cx).unwrap().update(cx, f)
109 }
110
111 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
112 self.update_view(cx, |view, cx| view.snapshot(cx))
113 }
114
115 fn attach_mouse_handlers(
116 view: &WeakViewHandle<Editor>,
117 position_map: &Arc<PositionMap>,
118 visible_bounds: RectF,
119 text_bounds: RectF,
120 gutter_bounds: RectF,
121 bounds: RectF,
122 cx: &mut PaintContext,
123 ) {
124 enum EditorElementMouseHandlers {}
125 cx.scene.push_mouse_region(
126 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
127 .on_down(MouseButton::Left, {
128 let position_map = position_map.clone();
129 move |e, cx| {
130 if !Self::mouse_down(
131 e.platform_event,
132 position_map.as_ref(),
133 text_bounds,
134 gutter_bounds,
135 cx,
136 ) {
137 cx.propogate_event();
138 }
139 }
140 })
141 .on_down(MouseButton::Right, {
142 let position_map = position_map.clone();
143 move |e, cx| {
144 if !Self::mouse_right_down(
145 e.position,
146 position_map.as_ref(),
147 text_bounds,
148 cx,
149 ) {
150 cx.propogate_event();
151 }
152 }
153 })
154 .on_up(MouseButton::Left, {
155 let view = view.clone();
156 let position_map = position_map.clone();
157 move |e, cx| {
158 if !Self::mouse_up(
159 view.clone(),
160 e.position,
161 e.cmd,
162 e.shift,
163 position_map.as_ref(),
164 text_bounds,
165 cx,
166 ) {
167 cx.propogate_event()
168 }
169 }
170 })
171 .on_drag(MouseButton::Left, {
172 let view = view.clone();
173 let position_map = position_map.clone();
174 move |e, cx| {
175 if !Self::mouse_dragged(
176 view.clone(),
177 e.platform_event,
178 position_map.as_ref(),
179 text_bounds,
180 cx,
181 ) {
182 cx.propogate_event()
183 }
184 }
185 })
186 .on_move({
187 let position_map = position_map.clone();
188 move |e, cx| {
189 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
190 cx.propogate_event()
191 }
192 }
193 })
194 .on_scroll({
195 let position_map = position_map.clone();
196 move |e, cx| {
197 if !Self::scroll(e.position, e.delta, e.precise, &position_map, bounds, cx)
198 {
199 cx.propogate_event()
200 }
201 }
202 }),
203 );
204 }
205
206 fn mouse_down(
207 MouseButtonEvent {
208 position,
209 ctrl,
210 alt,
211 shift,
212 cmd,
213 mut click_count,
214 ..
215 }: MouseButtonEvent,
216 position_map: &PositionMap,
217 text_bounds: RectF,
218 gutter_bounds: RectF,
219 cx: &mut EventContext,
220 ) -> bool {
221 if gutter_bounds.contains_point(position) {
222 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
223 } else if !text_bounds.contains_point(position) {
224 return false;
225 }
226
227 let (position, target_position) = position_map.point_for_position(text_bounds, position);
228
229 if shift && alt {
230 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
231 position,
232 goal_column: target_position.column(),
233 }));
234 } else if shift && !ctrl && !alt && !cmd {
235 cx.dispatch_action(Select(SelectPhase::Extend {
236 position,
237 click_count,
238 }));
239 } else {
240 cx.dispatch_action(Select(SelectPhase::Begin {
241 position,
242 add: alt,
243 click_count,
244 }));
245 }
246
247 true
248 }
249
250 fn mouse_right_down(
251 position: Vector2F,
252 position_map: &PositionMap,
253 text_bounds: RectF,
254 cx: &mut EventContext,
255 ) -> bool {
256 if !text_bounds.contains_point(position) {
257 return false;
258 }
259
260 let (point, _) = position_map.point_for_position(text_bounds, position);
261
262 cx.dispatch_action(DeployMouseContextMenu { position, point });
263 true
264 }
265
266 fn mouse_up(
267 view: WeakViewHandle<Editor>,
268 position: Vector2F,
269 cmd: bool,
270 shift: bool,
271 position_map: &PositionMap,
272 text_bounds: RectF,
273 cx: &mut EventContext,
274 ) -> bool {
275 let view = view.upgrade(cx.app).unwrap().read(cx.app);
276 let end_selection = view.has_pending_selection();
277 let pending_nonempty_selections = view.has_pending_nonempty_selection();
278
279 if end_selection {
280 cx.dispatch_action(Select(SelectPhase::End));
281 }
282
283 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
284 let (point, target_point) = position_map.point_for_position(text_bounds, position);
285
286 if point == target_point {
287 if shift {
288 cx.dispatch_action(GoToFetchedTypeDefinition { point });
289 } else {
290 cx.dispatch_action(GoToFetchedDefinition { point });
291 }
292
293 return true;
294 }
295 }
296
297 end_selection
298 }
299
300 fn mouse_dragged(
301 view: WeakViewHandle<Editor>,
302 MouseMovedEvent {
303 cmd,
304 shift,
305 position,
306 ..
307 }: MouseMovedEvent,
308 position_map: &PositionMap,
309 text_bounds: RectF,
310 cx: &mut EventContext,
311 ) -> bool {
312 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
313 // Don't trigger hover popover if mouse is hovering over context menu
314 let point = if text_bounds.contains_point(position) {
315 let (point, target_point) = position_map.point_for_position(text_bounds, position);
316 if point == target_point {
317 Some(point)
318 } else {
319 None
320 }
321 } else {
322 None
323 };
324
325 cx.dispatch_action(UpdateGoToDefinitionLink {
326 point,
327 cmd_held: cmd,
328 shift_held: shift,
329 });
330
331 let view = view.upgrade(cx.app).unwrap().read(cx.app);
332 if view.has_pending_selection() {
333 let mut scroll_delta = Vector2F::zero();
334
335 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
336 let top = text_bounds.origin_y() + vertical_margin;
337 let bottom = text_bounds.lower_left().y() - vertical_margin;
338 if position.y() < top {
339 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
340 }
341 if position.y() > bottom {
342 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
343 }
344
345 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
346 let left = text_bounds.origin_x() + horizontal_margin;
347 let right = text_bounds.upper_right().x() - horizontal_margin;
348 if position.x() < left {
349 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
350 left - position.x(),
351 ))
352 }
353 if position.x() > right {
354 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
355 position.x() - right,
356 ))
357 }
358
359 let (position, target_position) =
360 position_map.point_for_position(text_bounds, position);
361
362 cx.dispatch_action(Select(SelectPhase::Update {
363 position,
364 goal_column: target_position.column(),
365 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
366 .clamp(Vector2F::zero(), position_map.scroll_max),
367 }));
368
369 cx.dispatch_action(HoverAt { point });
370 true
371 } else {
372 cx.dispatch_action(HoverAt { point });
373 false
374 }
375 }
376
377 fn mouse_moved(
378 MouseMovedEvent {
379 cmd,
380 shift,
381 position,
382 ..
383 }: MouseMovedEvent,
384 position_map: &PositionMap,
385 text_bounds: RectF,
386 cx: &mut EventContext,
387 ) -> bool {
388 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
389 // Don't trigger hover popover if mouse is hovering over context menu
390 let point = if text_bounds.contains_point(position) {
391 let (point, target_point) = position_map.point_for_position(text_bounds, position);
392 if point == target_point {
393 Some(point)
394 } else {
395 None
396 }
397 } else {
398 None
399 };
400
401 cx.dispatch_action(UpdateGoToDefinitionLink {
402 point,
403 cmd_held: cmd,
404 shift_held: shift,
405 });
406
407 cx.dispatch_action(HoverAt { point });
408 true
409 }
410
411 fn modifiers_changed(&self, event: ModifiersChangedEvent, cx: &mut EventContext) -> bool {
412 cx.dispatch_action(CmdShiftChanged {
413 cmd_down: event.cmd,
414 shift_down: event.shift,
415 });
416 false
417 }
418
419 fn scroll(
420 position: Vector2F,
421 mut delta: Vector2F,
422 precise: bool,
423 position_map: &PositionMap,
424 bounds: RectF,
425 cx: &mut EventContext,
426 ) -> bool {
427 if !bounds.contains_point(position) {
428 return false;
429 }
430
431 let max_glyph_width = position_map.em_width;
432 if !precise {
433 delta *= vec2f(max_glyph_width, position_map.line_height);
434 }
435
436 let scroll_position = position_map.snapshot.scroll_position();
437 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
438 let y =
439 (scroll_position.y() * position_map.line_height - delta.y()) / position_map.line_height;
440 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
441
442 cx.dispatch_action(Scroll(scroll_position));
443
444 true
445 }
446
447 fn paint_background(
448 &self,
449 gutter_bounds: RectF,
450 text_bounds: RectF,
451 layout: &LayoutState,
452 cx: &mut PaintContext,
453 ) {
454 let bounds = gutter_bounds.union_rect(text_bounds);
455 let scroll_top =
456 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
457 let editor = self.view(cx.app);
458 cx.scene.push_quad(Quad {
459 bounds: gutter_bounds,
460 background: Some(self.style.gutter_background),
461 border: Border::new(0., Color::transparent_black()),
462 corner_radius: 0.,
463 });
464 cx.scene.push_quad(Quad {
465 bounds: text_bounds,
466 background: Some(self.style.background),
467 border: Border::new(0., Color::transparent_black()),
468 corner_radius: 0.,
469 });
470
471 if let EditorMode::Full = editor.mode {
472 let mut active_rows = layout.active_rows.iter().peekable();
473 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
474 let mut end_row = *start_row;
475 while active_rows.peek().map_or(false, |r| {
476 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
477 }) {
478 active_rows.next().unwrap();
479 end_row += 1;
480 }
481
482 if !contains_non_empty_selection {
483 let origin = vec2f(
484 bounds.origin_x(),
485 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
486 - scroll_top,
487 );
488 let size = vec2f(
489 bounds.width(),
490 layout.position_map.line_height * (end_row - start_row + 1) as f32,
491 );
492 cx.scene.push_quad(Quad {
493 bounds: RectF::new(origin, size),
494 background: Some(self.style.active_line_background),
495 border: Border::default(),
496 corner_radius: 0.,
497 });
498 }
499 }
500
501 if let Some(highlighted_rows) = &layout.highlighted_rows {
502 let origin = vec2f(
503 bounds.origin_x(),
504 bounds.origin_y()
505 + (layout.position_map.line_height * highlighted_rows.start as f32)
506 - scroll_top,
507 );
508 let size = vec2f(
509 bounds.width(),
510 layout.position_map.line_height * highlighted_rows.len() as f32,
511 );
512 cx.scene.push_quad(Quad {
513 bounds: RectF::new(origin, size),
514 background: Some(self.style.highlighted_line_background),
515 border: Border::default(),
516 corner_radius: 0.,
517 });
518 }
519 }
520 }
521
522 fn paint_gutter(
523 &mut self,
524 bounds: RectF,
525 visible_bounds: RectF,
526 layout: &mut LayoutState,
527 cx: &mut PaintContext,
528 ) {
529 struct GutterLayout {
530 line_height: f32,
531 // scroll_position: Vector2F,
532 scroll_top: f32,
533 bounds: RectF,
534 }
535
536 struct DiffLayout<'a> {
537 buffer_line: usize,
538 last_diff: Option<(&'a DiffHunk<u32>, usize)>,
539 }
540
541 fn diff_quad(
542 status: DiffHunkStatus,
543 layout_range: Range<usize>,
544 gutter_layout: &GutterLayout,
545 diff_style: &DiffStyle,
546 ) -> Quad {
547 let color = match status {
548 DiffHunkStatus::Added => diff_style.inserted,
549 DiffHunkStatus::Modified => diff_style.modified,
550
551 //TODO: This rendering is entirely a horrible hack
552 DiffHunkStatus::Removed => {
553 let row = layout_range.start;
554
555 let offset = gutter_layout.line_height / 2.;
556 let start_y =
557 row as f32 * gutter_layout.line_height + offset - gutter_layout.scroll_top;
558 let end_y = start_y + gutter_layout.line_height;
559
560 let width = diff_style.removed_width_em * gutter_layout.line_height;
561 let highlight_origin = gutter_layout.bounds.origin() + vec2f(-width, start_y);
562 let highlight_size = vec2f(width * 2., end_y - start_y);
563 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
564
565 return Quad {
566 bounds: highlight_bounds,
567 background: Some(diff_style.deleted),
568 border: Border::new(0., Color::transparent_black()),
569 corner_radius: 1. * gutter_layout.line_height,
570 };
571 }
572 };
573
574 let start_row = layout_range.start;
575 let end_row = layout_range.end;
576
577 let start_y = start_row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
578 let end_y = end_row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
579
580 let width = diff_style.width_em * gutter_layout.line_height;
581 let highlight_origin = gutter_layout.bounds.origin() + vec2f(-width, start_y);
582 let highlight_size = vec2f(width * 2., end_y - start_y);
583 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
584
585 Quad {
586 bounds: highlight_bounds,
587 background: Some(color),
588 border: Border::new(0., Color::transparent_black()),
589 corner_radius: diff_style.corner_radius * gutter_layout.line_height,
590 }
591 }
592
593 let gutter_layout = {
594 let scroll_position = layout.position_map.snapshot.scroll_position();
595 let line_height = layout.position_map.line_height;
596 GutterLayout {
597 scroll_top: scroll_position.y() * line_height,
598 // scroll_position,
599 line_height,
600 bounds,
601 }
602 };
603
604 let mut diff_layout = DiffLayout {
605 buffer_line: 0,
606 last_diff: None,
607 };
608
609 let diff_style = &cx.global::<Settings>().theme.editor.diff.clone();
610 // dbg!("***************");
611 // dbg!(&layout.diff_hunks);
612 // dbg!("***************");
613
614 // line is `None` when there's a line wrap
615 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
616 // dbg!(ix);
617 if let Some(line) = line {
618 let line_origin = bounds.origin()
619 + vec2f(
620 bounds.width() - line.width() - layout.gutter_padding,
621 ix as f32 * gutter_layout.line_height
622 - (gutter_layout.scroll_top % gutter_layout.line_height),
623 );
624
625 line.paint(line_origin, visible_bounds, gutter_layout.line_height, cx);
626
627 //This line starts a buffer line, so let's do the diff calculation
628 let new_hunk = get_hunk(diff_layout.buffer_line, &layout.diff_hunks);
629
630 // This + the unwraps are annoying, but at least it's legible
631 let (is_ending, is_starting) = match (diff_layout.last_diff, new_hunk) {
632 (None, None) => (false, false),
633 (None, Some(_)) => (false, true),
634 (Some(_), None) => (true, false),
635 (Some((old_hunk, _)), Some(new_hunk)) if new_hunk == old_hunk => (false, false),
636 (Some(_), Some(_)) => (true, true),
637 };
638
639 // dbg!(diff_layout.buffer_line, is_starting);
640
641 if is_ending {
642 let (last_hunk, start_line) = diff_layout.last_diff.take().unwrap();
643 // dbg!("ending");
644 // dbg!(start_line..ix);
645 cx.scene.push_quad(diff_quad(
646 last_hunk.status(),
647 start_line..ix,
648 &gutter_layout,
649 diff_style,
650 ));
651 }
652
653 if is_starting {
654 let new_hunk = new_hunk.unwrap();
655
656 diff_layout.last_diff = Some((new_hunk, ix));
657 };
658
659 diff_layout.buffer_line += 1;
660 }
661 }
662
663 // If we ran out with a diff hunk still being prepped, paint it now
664 if let Some((last_hunk, start_line)) = diff_layout.last_diff {
665 let end_line = layout.line_number_layouts.len();
666 cx.scene.push_quad(diff_quad(
667 last_hunk.status(),
668 start_line..end_line,
669 &gutter_layout,
670 diff_style,
671 ))
672 }
673
674 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
675 let mut x = bounds.width() - layout.gutter_padding;
676 let mut y = *row as f32 * gutter_layout.line_height - gutter_layout.scroll_top;
677 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
678 y += (gutter_layout.line_height - indicator.size().y()) / 2.;
679 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
680 }
681 }
682
683 fn paint_text(
684 &mut self,
685 bounds: RectF,
686 visible_bounds: RectF,
687 layout: &mut LayoutState,
688 cx: &mut PaintContext,
689 ) {
690 let view = self.view(cx.app);
691 let style = &self.style;
692 let local_replica_id = view.replica_id(cx);
693 let scroll_position = layout.position_map.snapshot.scroll_position();
694 let start_row = scroll_position.y() as u32;
695 let scroll_top = scroll_position.y() * layout.position_map.line_height;
696 let end_row =
697 ((scroll_top + bounds.height()) / layout.position_map.line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
698 let max_glyph_width = layout.position_map.em_width;
699 let scroll_left = scroll_position.x() * max_glyph_width;
700 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
701
702 cx.scene.push_layer(Some(bounds));
703
704 cx.scene.push_cursor_region(CursorRegion {
705 bounds,
706 style: if !view.link_go_to_definition_state.definitions.is_empty() {
707 CursorStyle::PointingHand
708 } else {
709 CursorStyle::IBeam
710 },
711 });
712
713 for (range, color) in &layout.highlighted_ranges {
714 self.paint_highlighted_range(
715 range.clone(),
716 start_row,
717 end_row,
718 *color,
719 0.,
720 0.15 * layout.position_map.line_height,
721 layout,
722 content_origin,
723 scroll_top,
724 scroll_left,
725 bounds,
726 cx,
727 );
728 }
729
730 let mut cursors = SmallVec::<[Cursor; 32]>::new();
731 for (replica_id, selections) in &layout.selections {
732 let selection_style = style.replica_selection_style(*replica_id);
733 let corner_radius = 0.15 * layout.position_map.line_height;
734
735 for selection in selections {
736 self.paint_highlighted_range(
737 selection.range.clone(),
738 start_row,
739 end_row,
740 selection_style.selection,
741 corner_radius,
742 corner_radius * 2.,
743 layout,
744 content_origin,
745 scroll_top,
746 scroll_left,
747 bounds,
748 cx,
749 );
750
751 if view.show_local_cursors() || *replica_id != local_replica_id {
752 let cursor_position = selection.head;
753 if (start_row..end_row).contains(&cursor_position.row()) {
754 let cursor_row_layout = &layout.position_map.line_layouts
755 [(cursor_position.row() - start_row) as usize];
756 let cursor_column = cursor_position.column() as usize;
757
758 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
759 let mut block_width =
760 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
761 if block_width == 0.0 {
762 block_width = layout.position_map.em_width;
763 }
764 let block_text = if let CursorShape::Block = self.cursor_shape {
765 layout
766 .position_map
767 .snapshot
768 .chars_at(cursor_position)
769 .next()
770 .and_then(|character| {
771 let font_id =
772 cursor_row_layout.font_for_index(cursor_column)?;
773 let text = character.to_string();
774
775 Some(cx.text_layout_cache.layout_str(
776 &text,
777 cursor_row_layout.font_size(),
778 &[(
779 text.len(),
780 RunStyle {
781 font_id,
782 color: style.background,
783 underline: Default::default(),
784 },
785 )],
786 ))
787 })
788 } else {
789 None
790 };
791
792 let x = cursor_character_x - scroll_left;
793 let y = cursor_position.row() as f32 * layout.position_map.line_height
794 - scroll_top;
795 cursors.push(Cursor {
796 color: selection_style.cursor,
797 block_width,
798 origin: vec2f(x, y),
799 line_height: layout.position_map.line_height,
800 shape: self.cursor_shape,
801 block_text,
802 });
803 }
804 }
805 }
806 }
807
808 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
809 // Draw glyphs
810 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
811 let row = start_row + ix as u32;
812 line.paint(
813 content_origin
814 + vec2f(
815 -scroll_left,
816 row as f32 * layout.position_map.line_height - scroll_top,
817 ),
818 visible_text_bounds,
819 layout.position_map.line_height,
820 cx,
821 );
822 }
823 }
824
825 cx.scene.push_layer(Some(bounds));
826 for cursor in cursors {
827 cursor.paint(content_origin, cx);
828 }
829 cx.scene.pop_layer();
830
831 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
832 cx.scene.push_stacking_context(None);
833 let cursor_row_layout =
834 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
835 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
836 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
837 let mut list_origin = content_origin + vec2f(x, y);
838 let list_width = context_menu.size().x();
839 let list_height = context_menu.size().y();
840
841 // Snap the right edge of the list to the right edge of the window if
842 // its horizontal bounds overflow.
843 if list_origin.x() + list_width > cx.window_size.x() {
844 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
845 }
846
847 if list_origin.y() + list_height > bounds.max_y() {
848 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
849 }
850
851 context_menu.paint(
852 list_origin,
853 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
854 cx,
855 );
856
857 cx.scene.pop_stacking_context();
858 }
859
860 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
861 cx.scene.push_stacking_context(None);
862
863 // This is safe because we check on layout whether the required row is available
864 let hovered_row_layout =
865 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
866
867 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
868 // height. This is the size we will use to decide whether to render popovers above or below
869 // the hovered line.
870 let first_size = hover_popovers[0].size();
871 let height_to_reserve = first_size.y()
872 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
873
874 // Compute Hovered Point
875 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
876 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
877 let hovered_point = content_origin + vec2f(x, y);
878
879 if hovered_point.y() - height_to_reserve > 0.0 {
880 // There is enough space above. Render popovers above the hovered point
881 let mut current_y = hovered_point.y();
882 for hover_popover in hover_popovers {
883 let size = hover_popover.size();
884 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
885
886 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
887 if x_out_of_bounds < 0.0 {
888 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
889 }
890
891 hover_popover.paint(
892 popover_origin,
893 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
894 cx,
895 );
896
897 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
898 }
899 } else {
900 // There is not enough space above. Render popovers below the hovered point
901 let mut current_y = hovered_point.y() + layout.position_map.line_height;
902 for hover_popover in hover_popovers {
903 let size = hover_popover.size();
904 let mut popover_origin = vec2f(hovered_point.x(), current_y);
905
906 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
907 if x_out_of_bounds < 0.0 {
908 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
909 }
910
911 hover_popover.paint(
912 popover_origin,
913 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
914 cx,
915 );
916
917 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
918 }
919 }
920
921 cx.scene.pop_stacking_context();
922 }
923
924 cx.scene.pop_layer();
925 }
926
927 #[allow(clippy::too_many_arguments)]
928 fn paint_highlighted_range(
929 &self,
930 range: Range<DisplayPoint>,
931 start_row: u32,
932 end_row: u32,
933 color: Color,
934 corner_radius: f32,
935 line_end_overshoot: f32,
936 layout: &LayoutState,
937 content_origin: Vector2F,
938 scroll_top: f32,
939 scroll_left: f32,
940 bounds: RectF,
941 cx: &mut PaintContext,
942 ) {
943 if range.start != range.end {
944 let row_range = if range.end.column() == 0 {
945 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
946 } else {
947 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
948 };
949
950 let highlighted_range = HighlightedRange {
951 color,
952 line_height: layout.position_map.line_height,
953 corner_radius,
954 start_y: content_origin.y()
955 + row_range.start as f32 * layout.position_map.line_height
956 - scroll_top,
957 lines: row_range
958 .into_iter()
959 .map(|row| {
960 let line_layout =
961 &layout.position_map.line_layouts[(row - start_row) as usize];
962 HighlightedRangeLine {
963 start_x: if row == range.start.row() {
964 content_origin.x()
965 + line_layout.x_for_index(range.start.column() as usize)
966 - scroll_left
967 } else {
968 content_origin.x() - scroll_left
969 },
970 end_x: if row == range.end.row() {
971 content_origin.x()
972 + line_layout.x_for_index(range.end.column() as usize)
973 - scroll_left
974 } else {
975 content_origin.x() + line_layout.width() + line_end_overshoot
976 - scroll_left
977 },
978 }
979 })
980 .collect(),
981 };
982
983 highlighted_range.paint(bounds, cx.scene);
984 }
985 }
986
987 fn paint_blocks(
988 &mut self,
989 bounds: RectF,
990 visible_bounds: RectF,
991 layout: &mut LayoutState,
992 cx: &mut PaintContext,
993 ) {
994 let scroll_position = layout.position_map.snapshot.scroll_position();
995 let scroll_left = scroll_position.x() * layout.position_map.em_width;
996 let scroll_top = scroll_position.y() * layout.position_map.line_height;
997
998 for block in &mut layout.blocks {
999 let mut origin = bounds.origin()
1000 + vec2f(
1001 0.,
1002 block.row as f32 * layout.position_map.line_height - scroll_top,
1003 );
1004 if !matches!(block.style, BlockStyle::Sticky) {
1005 origin += vec2f(-scroll_left, 0.);
1006 }
1007 block.element.paint(origin, visible_bounds, cx);
1008 }
1009 }
1010
1011 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
1012 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
1013 let style = &self.style;
1014
1015 cx.text_layout_cache
1016 .layout_str(
1017 "1".repeat(digit_count).as_str(),
1018 style.text.font_size,
1019 &[(
1020 digit_count,
1021 RunStyle {
1022 font_id: style.text.font_id,
1023 color: Color::black(),
1024 underline: Default::default(),
1025 },
1026 )],
1027 )
1028 .width()
1029 }
1030
1031 fn layout_line_numbers(
1032 &self,
1033 rows: Range<u32>,
1034 active_rows: &BTreeMap<u32, bool>,
1035 snapshot: &EditorSnapshot,
1036 cx: &LayoutContext,
1037 ) -> Vec<Option<text_layout::Line>> {
1038 let style = &self.style;
1039 let include_line_numbers = snapshot.mode == EditorMode::Full;
1040 let mut line_number_layouts = Vec::with_capacity(rows.len());
1041 let mut line_number = String::new();
1042 for (ix, row) in snapshot
1043 .buffer_rows(rows.start)
1044 .take((rows.end - rows.start) as usize)
1045 .enumerate()
1046 {
1047 let display_row = rows.start + ix as u32;
1048 let color = if active_rows.contains_key(&display_row) {
1049 style.line_number_active
1050 } else {
1051 style.line_number
1052 };
1053 if let Some(buffer_row) = row {
1054 if include_line_numbers {
1055 line_number.clear();
1056 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
1057 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
1058 &line_number,
1059 style.text.font_size,
1060 &[(
1061 line_number.len(),
1062 RunStyle {
1063 font_id: style.text.font_id,
1064 color,
1065 underline: Default::default(),
1066 },
1067 )],
1068 )));
1069 }
1070 } else {
1071 line_number_layouts.push(None);
1072 }
1073 }
1074
1075 line_number_layouts
1076 }
1077
1078 fn layout_lines(
1079 &mut self,
1080 rows: Range<u32>,
1081 snapshot: &EditorSnapshot,
1082 cx: &LayoutContext,
1083 ) -> Vec<text_layout::Line> {
1084 if rows.start >= rows.end {
1085 return Vec::new();
1086 }
1087
1088 // When the editor is empty and unfocused, then show the placeholder.
1089 if snapshot.is_empty() && !snapshot.is_focused() {
1090 let placeholder_style = self
1091 .style
1092 .placeholder_text
1093 .as_ref()
1094 .unwrap_or(&self.style.text);
1095 let placeholder_text = snapshot.placeholder_text();
1096 let placeholder_lines = placeholder_text
1097 .as_ref()
1098 .map_or("", AsRef::as_ref)
1099 .split('\n')
1100 .skip(rows.start as usize)
1101 .chain(iter::repeat(""))
1102 .take(rows.len());
1103 placeholder_lines
1104 .map(|line| {
1105 cx.text_layout_cache.layout_str(
1106 line,
1107 placeholder_style.font_size,
1108 &[(
1109 line.len(),
1110 RunStyle {
1111 font_id: placeholder_style.font_id,
1112 color: placeholder_style.color,
1113 underline: Default::default(),
1114 },
1115 )],
1116 )
1117 })
1118 .collect()
1119 } else {
1120 let style = &self.style;
1121 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1122 let mut highlight_style = chunk
1123 .syntax_highlight_id
1124 .and_then(|id| id.style(&style.syntax));
1125
1126 if let Some(chunk_highlight) = chunk.highlight_style {
1127 if let Some(highlight_style) = highlight_style.as_mut() {
1128 highlight_style.highlight(chunk_highlight);
1129 } else {
1130 highlight_style = Some(chunk_highlight);
1131 }
1132 }
1133
1134 let mut diagnostic_highlight = HighlightStyle::default();
1135
1136 if chunk.is_unnecessary {
1137 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1138 }
1139
1140 if let Some(severity) = chunk.diagnostic_severity {
1141 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1142 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1143 let diagnostic_style = super::diagnostic_style(severity, true, style);
1144 diagnostic_highlight.underline = Some(Underline {
1145 color: Some(diagnostic_style.message.text.color),
1146 thickness: 1.0.into(),
1147 squiggly: true,
1148 });
1149 }
1150 }
1151
1152 if let Some(highlight_style) = highlight_style.as_mut() {
1153 highlight_style.highlight(diagnostic_highlight);
1154 } else {
1155 highlight_style = Some(diagnostic_highlight);
1156 }
1157
1158 (chunk.text, highlight_style)
1159 });
1160 layout_highlighted_chunks(
1161 chunks,
1162 &style.text,
1163 cx.text_layout_cache,
1164 cx.font_cache,
1165 MAX_LINE_LEN,
1166 rows.len() as usize,
1167 )
1168 }
1169 }
1170
1171 #[allow(clippy::too_many_arguments)]
1172 fn layout_blocks(
1173 &mut self,
1174 rows: Range<u32>,
1175 snapshot: &EditorSnapshot,
1176 editor_width: f32,
1177 scroll_width: f32,
1178 gutter_padding: f32,
1179 gutter_width: f32,
1180 em_width: f32,
1181 text_x: f32,
1182 line_height: f32,
1183 style: &EditorStyle,
1184 line_layouts: &[text_layout::Line],
1185 cx: &mut LayoutContext,
1186 ) -> (f32, Vec<BlockLayout>) {
1187 let editor = if let Some(editor) = self.view.upgrade(cx) {
1188 editor
1189 } else {
1190 return Default::default();
1191 };
1192
1193 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1194 let scroll_x = snapshot.scroll_position.x();
1195 let (fixed_blocks, non_fixed_blocks) = snapshot
1196 .blocks_in_range(rows.clone())
1197 .partition::<Vec<_>, _>(|(_, block)| match block {
1198 TransformBlock::ExcerptHeader { .. } => false,
1199 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1200 });
1201 let mut render_block = |block: &TransformBlock, width: f32| {
1202 let mut element = match block {
1203 TransformBlock::Custom(block) => {
1204 let align_to = block
1205 .position()
1206 .to_point(&snapshot.buffer_snapshot)
1207 .to_display_point(snapshot);
1208 let anchor_x = text_x
1209 + if rows.contains(&align_to.row()) {
1210 line_layouts[(align_to.row() - rows.start) as usize]
1211 .x_for_index(align_to.column() as usize)
1212 } else {
1213 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1214 .x_for_index(align_to.column() as usize)
1215 };
1216
1217 cx.render(&editor, |_, cx| {
1218 block.render(&mut BlockContext {
1219 cx,
1220 anchor_x,
1221 gutter_padding,
1222 line_height,
1223 scroll_x,
1224 gutter_width,
1225 em_width,
1226 })
1227 })
1228 }
1229 TransformBlock::ExcerptHeader {
1230 key,
1231 buffer,
1232 range,
1233 starts_new_buffer,
1234 ..
1235 } => {
1236 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1237 let jump_position = range
1238 .primary
1239 .as_ref()
1240 .map_or(range.context.start, |primary| primary.start);
1241 let jump_action = crate::Jump {
1242 path: ProjectPath {
1243 worktree_id: file.worktree_id(cx),
1244 path: file.path.clone(),
1245 },
1246 position: language::ToPoint::to_point(&jump_position, buffer),
1247 anchor: jump_position,
1248 };
1249
1250 enum JumpIcon {}
1251 cx.render(&editor, |_, cx| {
1252 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1253 let style = style.jump_icon.style_for(state, false);
1254 Svg::new("icons/arrow_up_right_8.svg")
1255 .with_color(style.color)
1256 .constrained()
1257 .with_width(style.icon_width)
1258 .aligned()
1259 .contained()
1260 .with_style(style.container)
1261 .constrained()
1262 .with_width(style.button_width)
1263 .with_height(style.button_width)
1264 .boxed()
1265 })
1266 .with_cursor_style(CursorStyle::PointingHand)
1267 .on_click(MouseButton::Left, move |_, cx| {
1268 cx.dispatch_action(jump_action.clone())
1269 })
1270 .with_tooltip::<JumpIcon, _>(
1271 *key,
1272 "Jump to Buffer".to_string(),
1273 Some(Box::new(crate::OpenExcerpts)),
1274 tooltip_style.clone(),
1275 cx,
1276 )
1277 .aligned()
1278 .flex_float()
1279 .boxed()
1280 })
1281 });
1282
1283 if *starts_new_buffer {
1284 let style = &self.style.diagnostic_path_header;
1285 let font_size =
1286 (style.text_scale_factor * self.style.text.font_size).round();
1287
1288 let mut filename = None;
1289 let mut parent_path = None;
1290 if let Some(file) = buffer.file() {
1291 let path = file.path();
1292 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1293 parent_path =
1294 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1295 }
1296
1297 Flex::row()
1298 .with_child(
1299 Label::new(
1300 filename.unwrap_or_else(|| "untitled".to_string()),
1301 style.filename.text.clone().with_font_size(font_size),
1302 )
1303 .contained()
1304 .with_style(style.filename.container)
1305 .aligned()
1306 .boxed(),
1307 )
1308 .with_children(parent_path.map(|path| {
1309 Label::new(path, style.path.text.clone().with_font_size(font_size))
1310 .contained()
1311 .with_style(style.path.container)
1312 .aligned()
1313 .boxed()
1314 }))
1315 .with_children(jump_icon)
1316 .contained()
1317 .with_style(style.container)
1318 .with_padding_left(gutter_padding)
1319 .with_padding_right(gutter_padding)
1320 .expanded()
1321 .named("path header block")
1322 } else {
1323 let text_style = self.style.text.clone();
1324 Flex::row()
1325 .with_child(Label::new("…".to_string(), text_style).boxed())
1326 .with_children(jump_icon)
1327 .contained()
1328 .with_padding_left(gutter_padding)
1329 .with_padding_right(gutter_padding)
1330 .expanded()
1331 .named("collapsed context")
1332 }
1333 }
1334 };
1335
1336 element.layout(
1337 SizeConstraint {
1338 min: Vector2F::zero(),
1339 max: vec2f(width, block.height() as f32 * line_height),
1340 },
1341 cx,
1342 );
1343 element
1344 };
1345
1346 let mut fixed_block_max_width = 0f32;
1347 let mut blocks = Vec::new();
1348 for (row, block) in fixed_blocks {
1349 let element = render_block(block, f32::INFINITY);
1350 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1351 blocks.push(BlockLayout {
1352 row,
1353 element,
1354 style: BlockStyle::Fixed,
1355 });
1356 }
1357 for (row, block) in non_fixed_blocks {
1358 let style = match block {
1359 TransformBlock::Custom(block) => block.style(),
1360 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1361 };
1362 let width = match style {
1363 BlockStyle::Sticky => editor_width,
1364 BlockStyle::Flex => editor_width
1365 .max(fixed_block_max_width)
1366 .max(gutter_width + scroll_width),
1367 BlockStyle::Fixed => unreachable!(),
1368 };
1369 let element = render_block(block, width);
1370 blocks.push(BlockLayout {
1371 row,
1372 element,
1373 style,
1374 });
1375 }
1376 (
1377 scroll_width.max(fixed_block_max_width - gutter_width),
1378 blocks,
1379 )
1380 }
1381}
1382
1383/// Get the hunk that contains buffer_line, starting from start_idx
1384/// Returns none if there is none found, and
1385fn get_hunk(buffer_line: usize, hunks: &[DiffHunk<u32>]) -> Option<&DiffHunk<u32>> {
1386 for i in 0..hunks.len() {
1387 // Safety: Index out of bounds is handled by the check above
1388 let hunk = hunks.get(i).unwrap();
1389 if hunk.buffer_range.contains(&(buffer_line as u32)) {
1390 return Some(hunk);
1391 } else if hunk.status() == DiffHunkStatus::Removed
1392 && buffer_line == hunk.buffer_range.start as usize
1393 {
1394 return Some(hunk);
1395 } else if hunk.buffer_range.start > buffer_line as u32 {
1396 // If we've passed the buffer_line, just stop
1397 return None;
1398 }
1399 }
1400
1401 // We reached the end of the array without finding a hunk, just return none.
1402 return None;
1403}
1404
1405impl Element for EditorElement {
1406 type LayoutState = LayoutState;
1407 type PaintState = ();
1408
1409 fn layout(
1410 &mut self,
1411 constraint: SizeConstraint,
1412 cx: &mut LayoutContext,
1413 ) -> (Vector2F, Self::LayoutState) {
1414 let mut size = constraint.max;
1415 if size.x().is_infinite() {
1416 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1417 }
1418
1419 let snapshot = self.snapshot(cx.app);
1420 let style = self.style.clone();
1421 let line_height = style.text.line_height(cx.font_cache);
1422
1423 let gutter_padding;
1424 let gutter_width;
1425 let gutter_margin;
1426 if snapshot.mode == EditorMode::Full {
1427 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1428 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1429 gutter_margin = -style.text.descent(cx.font_cache);
1430 } else {
1431 gutter_padding = 0.0;
1432 gutter_width = 0.0;
1433 gutter_margin = 0.0;
1434 };
1435
1436 let text_width = size.x() - gutter_width;
1437 let em_width = style.text.em_width(cx.font_cache);
1438 let em_advance = style.text.em_advance(cx.font_cache);
1439 let overscroll = vec2f(em_width, 0.);
1440 let snapshot = self.update_view(cx.app, |view, cx| {
1441 let wrap_width = match view.soft_wrap_mode(cx) {
1442 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1443 SoftWrap::EditorWidth => {
1444 Some(text_width - gutter_margin - overscroll.x() - em_width)
1445 }
1446 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1447 };
1448
1449 if view.set_wrap_width(wrap_width, cx) {
1450 view.snapshot(cx)
1451 } else {
1452 snapshot
1453 }
1454 });
1455
1456 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1457 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1458 size.set_y(
1459 scroll_height
1460 .min(constraint.max_along(Axis::Vertical))
1461 .max(constraint.min_along(Axis::Vertical))
1462 .min(line_height * max_lines as f32),
1463 )
1464 } else if let EditorMode::SingleLine = snapshot.mode {
1465 size.set_y(
1466 line_height
1467 .min(constraint.max_along(Axis::Vertical))
1468 .max(constraint.min_along(Axis::Vertical)),
1469 )
1470 } else if size.y().is_infinite() {
1471 size.set_y(scroll_height);
1472 }
1473 let gutter_size = vec2f(gutter_width, size.y());
1474 let text_size = vec2f(text_width, size.y());
1475
1476 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1477 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1478 let snapshot = view.snapshot(cx);
1479 (autoscroll_horizontally, snapshot)
1480 });
1481
1482 let scroll_position = snapshot.scroll_position();
1483 // The scroll position is a fractional point, the whole number of which represents
1484 // the top of the window in terms of display rows.
1485 let start_row = scroll_position.y() as u32;
1486 let scroll_top = scroll_position.y() * line_height;
1487
1488 // Add 1 to ensure selections bleed off screen
1489 let end_row = 1 + cmp::min(
1490 ((scroll_top + size.y()) / line_height).ceil() as u32,
1491 snapshot.max_point().row(),
1492 );
1493
1494 let start_anchor = if start_row == 0 {
1495 Anchor::min()
1496 } else {
1497 snapshot
1498 .buffer_snapshot
1499 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1500 };
1501 let end_anchor = if end_row > snapshot.max_point().row() {
1502 Anchor::max()
1503 } else {
1504 snapshot
1505 .buffer_snapshot
1506 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1507 };
1508
1509 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1510 let mut active_rows = BTreeMap::new();
1511 let mut highlighted_rows = None;
1512 let mut highlighted_ranges = Vec::new();
1513 self.update_view(cx.app, |view, cx| {
1514 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1515
1516 highlighted_rows = view.highlighted_rows();
1517 let theme = cx.global::<Settings>().theme.as_ref();
1518 highlighted_ranges = view.background_highlights_in_range(
1519 start_anchor.clone()..end_anchor.clone(),
1520 &display_map,
1521 theme,
1522 );
1523
1524 let mut remote_selections = HashMap::default();
1525 for (replica_id, line_mode, selection) in display_map
1526 .buffer_snapshot
1527 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1528 {
1529 // The local selections match the leader's selections.
1530 if Some(replica_id) == view.leader_replica_id {
1531 continue;
1532 }
1533 remote_selections
1534 .entry(replica_id)
1535 .or_insert(Vec::new())
1536 .push(SelectionLayout::new(selection, line_mode, &display_map));
1537 }
1538 selections.extend(remote_selections);
1539
1540 if view.show_local_selections {
1541 let mut local_selections = view
1542 .selections
1543 .disjoint_in_range(start_anchor..end_anchor, cx);
1544 local_selections.extend(view.selections.pending(cx));
1545 for selection in &local_selections {
1546 let is_empty = selection.start == selection.end;
1547 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1548 let selection_end = snapshot.next_line_boundary(selection.end).1;
1549 for row in cmp::max(selection_start.row(), start_row)
1550 ..=cmp::min(selection_end.row(), end_row)
1551 {
1552 let contains_non_empty_selection =
1553 active_rows.entry(row).or_insert(!is_empty);
1554 *contains_non_empty_selection |= !is_empty;
1555 }
1556 }
1557
1558 // Render the local selections in the leader's color when following.
1559 let local_replica_id = view
1560 .leader_replica_id
1561 .unwrap_or_else(|| view.replica_id(cx));
1562
1563 selections.push((
1564 local_replica_id,
1565 local_selections
1566 .into_iter()
1567 .map(|selection| {
1568 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1569 })
1570 .collect(),
1571 ));
1572 }
1573 });
1574
1575 let line_number_layouts =
1576 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1577
1578 let diff_hunks = snapshot
1579 .buffer_snapshot
1580 .git_diff_hunks_in_range(start_row..end_row)
1581 .collect();
1582
1583 let mut max_visible_line_width = 0.0;
1584 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1585 for line in &line_layouts {
1586 if line.width() > max_visible_line_width {
1587 max_visible_line_width = line.width();
1588 }
1589 }
1590
1591 let style = self.style.clone();
1592 let longest_line_width = layout_line(
1593 snapshot.longest_row(),
1594 &snapshot,
1595 &style,
1596 cx.text_layout_cache,
1597 )
1598 .width();
1599 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1600 let em_width = style.text.em_width(cx.font_cache);
1601 let (scroll_width, blocks) = self.layout_blocks(
1602 start_row..end_row,
1603 &snapshot,
1604 size.x(),
1605 scroll_width,
1606 gutter_padding,
1607 gutter_width,
1608 em_width,
1609 gutter_width + gutter_margin,
1610 line_height,
1611 &style,
1612 &line_layouts,
1613 cx,
1614 );
1615
1616 let max_row = snapshot.max_point().row();
1617 let scroll_max = vec2f(
1618 ((scroll_width - text_size.x()) / em_width).max(0.0),
1619 max_row.saturating_sub(1) as f32,
1620 );
1621
1622 self.update_view(cx.app, |view, cx| {
1623 let clamped = view.clamp_scroll_left(scroll_max.x());
1624
1625 let autoscrolled = if autoscroll_horizontally {
1626 view.autoscroll_horizontally(
1627 start_row,
1628 text_size.x(),
1629 scroll_width,
1630 em_width,
1631 &line_layouts,
1632 cx,
1633 )
1634 } else {
1635 false
1636 };
1637
1638 if clamped || autoscrolled {
1639 snapshot = view.snapshot(cx);
1640 }
1641 });
1642
1643 let mut context_menu = None;
1644 let mut code_actions_indicator = None;
1645 let mut hover = None;
1646 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1647 let newest_selection_head = view
1648 .selections
1649 .newest::<usize>(cx)
1650 .head()
1651 .to_display_point(&snapshot);
1652
1653 let style = view.style(cx);
1654 if (start_row..end_row).contains(&newest_selection_head.row()) {
1655 if view.context_menu_visible() {
1656 context_menu =
1657 view.render_context_menu(newest_selection_head, style.clone(), cx);
1658 }
1659
1660 code_actions_indicator = view
1661 .render_code_actions_indicator(&style, cx)
1662 .map(|indicator| (newest_selection_head.row(), indicator));
1663 }
1664
1665 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1666 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1667 });
1668
1669 if let Some((_, context_menu)) = context_menu.as_mut() {
1670 context_menu.layout(
1671 SizeConstraint {
1672 min: Vector2F::zero(),
1673 max: vec2f(
1674 cx.window_size.x() * 0.7,
1675 (12. * line_height).min((size.y() - line_height) / 2.),
1676 ),
1677 },
1678 cx,
1679 );
1680 }
1681
1682 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1683 indicator.layout(
1684 SizeConstraint::strict_along(
1685 Axis::Vertical,
1686 line_height * style.code_actions.vertical_scale,
1687 ),
1688 cx,
1689 );
1690 }
1691
1692 if let Some((_, hover_popovers)) = hover.as_mut() {
1693 for hover_popover in hover_popovers.iter_mut() {
1694 hover_popover.layout(
1695 SizeConstraint {
1696 min: Vector2F::zero(),
1697 max: vec2f(
1698 (120. * em_width) // Default size
1699 .min(size.x() / 2.) // Shrink to half of the editor width
1700 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1701 (16. * line_height) // Default size
1702 .min(size.y() / 2.) // Shrink to half of the editor height
1703 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1704 ),
1705 },
1706 cx,
1707 );
1708 }
1709 }
1710
1711 (
1712 size,
1713 LayoutState {
1714 position_map: Arc::new(PositionMap {
1715 size,
1716 scroll_max,
1717 line_layouts,
1718 line_height,
1719 em_width,
1720 em_advance,
1721 snapshot,
1722 }),
1723 gutter_size,
1724 gutter_padding,
1725 text_size,
1726 gutter_margin,
1727 active_rows,
1728 highlighted_rows,
1729 highlighted_ranges,
1730 line_number_layouts,
1731 diff_hunks,
1732 blocks,
1733 selections,
1734 context_menu,
1735 code_actions_indicator,
1736 hover_popovers: hover,
1737 },
1738 )
1739 }
1740
1741 fn paint(
1742 &mut self,
1743 bounds: RectF,
1744 visible_bounds: RectF,
1745 layout: &mut Self::LayoutState,
1746 cx: &mut PaintContext,
1747 ) -> Self::PaintState {
1748 cx.scene.push_layer(Some(bounds));
1749
1750 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1751 let text_bounds = RectF::new(
1752 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1753 layout.text_size,
1754 );
1755
1756 Self::attach_mouse_handlers(
1757 &self.view,
1758 &layout.position_map,
1759 visible_bounds,
1760 text_bounds,
1761 gutter_bounds,
1762 bounds,
1763 cx,
1764 );
1765
1766 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1767 if layout.gutter_size.x() > 0. {
1768 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1769 }
1770 self.paint_text(text_bounds, visible_bounds, layout, cx);
1771
1772 if !layout.blocks.is_empty() {
1773 cx.scene.push_layer(Some(bounds));
1774 self.paint_blocks(bounds, visible_bounds, layout, cx);
1775 cx.scene.pop_layer();
1776 }
1777
1778 cx.scene.pop_layer();
1779 }
1780
1781 fn dispatch_event(
1782 &mut self,
1783 event: &Event,
1784 _: RectF,
1785 _: RectF,
1786 _: &mut LayoutState,
1787 _: &mut (),
1788 cx: &mut EventContext,
1789 ) -> bool {
1790 if let Event::ModifiersChanged(event) = event {
1791 self.modifiers_changed(*event, cx);
1792 }
1793
1794 false
1795 }
1796
1797 fn rect_for_text_range(
1798 &self,
1799 range_utf16: Range<usize>,
1800 bounds: RectF,
1801 _: RectF,
1802 layout: &Self::LayoutState,
1803 _: &Self::PaintState,
1804 _: &gpui::MeasurementContext,
1805 ) -> Option<RectF> {
1806 let text_bounds = RectF::new(
1807 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1808 layout.text_size,
1809 );
1810 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1811 let scroll_position = layout.position_map.snapshot.scroll_position();
1812 let start_row = scroll_position.y() as u32;
1813 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1814 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1815
1816 let range_start = OffsetUtf16(range_utf16.start)
1817 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1818 if range_start.row() < start_row {
1819 return None;
1820 }
1821
1822 let line = layout
1823 .position_map
1824 .line_layouts
1825 .get((range_start.row() - start_row) as usize)?;
1826 let range_start_x = line.x_for_index(range_start.column() as usize);
1827 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1828 Some(RectF::new(
1829 content_origin
1830 + vec2f(
1831 range_start_x,
1832 range_start_y + layout.position_map.line_height,
1833 )
1834 - vec2f(scroll_left, scroll_top),
1835 vec2f(
1836 layout.position_map.em_width,
1837 layout.position_map.line_height,
1838 ),
1839 ))
1840 }
1841
1842 fn debug(
1843 &self,
1844 bounds: RectF,
1845 _: &Self::LayoutState,
1846 _: &Self::PaintState,
1847 _: &gpui::DebugContext,
1848 ) -> json::Value {
1849 json!({
1850 "type": "BufferElement",
1851 "bounds": bounds.to_json()
1852 })
1853 }
1854}
1855
1856pub struct LayoutState {
1857 position_map: Arc<PositionMap>,
1858 gutter_size: Vector2F,
1859 gutter_padding: f32,
1860 gutter_margin: f32,
1861 text_size: Vector2F,
1862 active_rows: BTreeMap<u32, bool>,
1863 highlighted_rows: Option<Range<u32>>,
1864 line_number_layouts: Vec<Option<text_layout::Line>>,
1865 blocks: Vec<BlockLayout>,
1866 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1867 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1868 context_menu: Option<(DisplayPoint, ElementBox)>,
1869 diff_hunks: Vec<DiffHunk<u32>>,
1870 code_actions_indicator: Option<(u32, ElementBox)>,
1871 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
1872}
1873
1874pub struct PositionMap {
1875 size: Vector2F,
1876 line_height: f32,
1877 scroll_max: Vector2F,
1878 em_width: f32,
1879 em_advance: f32,
1880 line_layouts: Vec<text_layout::Line>,
1881 snapshot: EditorSnapshot,
1882}
1883
1884impl PositionMap {
1885 /// Returns two display points:
1886 /// 1. The nearest *valid* position in the editor
1887 /// 2. An unclipped, potentially *invalid* position that maps directly to
1888 /// the given pixel position.
1889 fn point_for_position(
1890 &self,
1891 text_bounds: RectF,
1892 position: Vector2F,
1893 ) -> (DisplayPoint, DisplayPoint) {
1894 let scroll_position = self.snapshot.scroll_position();
1895 let position = position - text_bounds.origin();
1896 let y = position.y().max(0.0).min(self.size.y());
1897 let x = position.x() + (scroll_position.x() * self.em_width);
1898 let row = (y / self.line_height + scroll_position.y()) as u32;
1899 let (column, x_overshoot) = if let Some(line) = self
1900 .line_layouts
1901 .get(row as usize - scroll_position.y() as usize)
1902 {
1903 if let Some(ix) = line.index_for_x(x) {
1904 (ix as u32, 0.0)
1905 } else {
1906 (line.len() as u32, 0f32.max(x - line.width()))
1907 }
1908 } else {
1909 (0, x)
1910 };
1911
1912 let mut target_point = DisplayPoint::new(row, column);
1913 let point = self.snapshot.clip_point(target_point, Bias::Left);
1914 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
1915
1916 (point, target_point)
1917 }
1918}
1919
1920struct BlockLayout {
1921 row: u32,
1922 element: ElementBox,
1923 style: BlockStyle,
1924}
1925
1926fn layout_line(
1927 row: u32,
1928 snapshot: &EditorSnapshot,
1929 style: &EditorStyle,
1930 layout_cache: &TextLayoutCache,
1931) -> text_layout::Line {
1932 let mut line = snapshot.line(row);
1933
1934 if line.len() > MAX_LINE_LEN {
1935 let mut len = MAX_LINE_LEN;
1936 while !line.is_char_boundary(len) {
1937 len -= 1;
1938 }
1939
1940 line.truncate(len);
1941 }
1942
1943 layout_cache.layout_str(
1944 &line,
1945 style.text.font_size,
1946 &[(
1947 snapshot.line_len(row) as usize,
1948 RunStyle {
1949 font_id: style.text.font_id,
1950 color: Color::black(),
1951 underline: Default::default(),
1952 },
1953 )],
1954 )
1955}
1956
1957#[derive(Copy, Clone, PartialEq, Eq, Debug)]
1958pub enum CursorShape {
1959 Bar,
1960 Block,
1961 Underscore,
1962 Hollow,
1963}
1964
1965impl Default for CursorShape {
1966 fn default() -> Self {
1967 CursorShape::Bar
1968 }
1969}
1970
1971#[derive(Debug)]
1972pub struct Cursor {
1973 origin: Vector2F,
1974 block_width: f32,
1975 line_height: f32,
1976 color: Color,
1977 shape: CursorShape,
1978 block_text: Option<Line>,
1979}
1980
1981impl Cursor {
1982 pub fn new(
1983 origin: Vector2F,
1984 block_width: f32,
1985 line_height: f32,
1986 color: Color,
1987 shape: CursorShape,
1988 block_text: Option<Line>,
1989 ) -> Cursor {
1990 Cursor {
1991 origin,
1992 block_width,
1993 line_height,
1994 color,
1995 shape,
1996 block_text,
1997 }
1998 }
1999
2000 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
2001 RectF::new(
2002 self.origin + origin,
2003 vec2f(self.block_width, self.line_height),
2004 )
2005 }
2006
2007 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
2008 let bounds = match self.shape {
2009 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
2010 CursorShape::Block | CursorShape::Hollow => RectF::new(
2011 self.origin + origin,
2012 vec2f(self.block_width, self.line_height),
2013 ),
2014 CursorShape::Underscore => RectF::new(
2015 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
2016 vec2f(self.block_width, 2.0),
2017 ),
2018 };
2019
2020 //Draw background or border quad
2021 if matches!(self.shape, CursorShape::Hollow) {
2022 cx.scene.push_quad(Quad {
2023 bounds,
2024 background: None,
2025 border: Border::all(1., self.color),
2026 corner_radius: 0.,
2027 });
2028 } else {
2029 cx.scene.push_quad(Quad {
2030 bounds,
2031 background: Some(self.color),
2032 border: Default::default(),
2033 corner_radius: 0.,
2034 });
2035 }
2036
2037 if let Some(block_text) = &self.block_text {
2038 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
2039 }
2040 }
2041
2042 pub fn shape(&self) -> CursorShape {
2043 self.shape
2044 }
2045}
2046
2047#[derive(Debug)]
2048pub struct HighlightedRange {
2049 pub start_y: f32,
2050 pub line_height: f32,
2051 pub lines: Vec<HighlightedRangeLine>,
2052 pub color: Color,
2053 pub corner_radius: f32,
2054}
2055
2056#[derive(Debug)]
2057pub struct HighlightedRangeLine {
2058 pub start_x: f32,
2059 pub end_x: f32,
2060}
2061
2062impl HighlightedRange {
2063 pub fn paint(&self, bounds: RectF, scene: &mut Scene) {
2064 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
2065 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
2066 self.paint_lines(
2067 self.start_y + self.line_height,
2068 &self.lines[1..],
2069 bounds,
2070 scene,
2071 );
2072 } else {
2073 self.paint_lines(self.start_y, &self.lines, bounds, scene);
2074 }
2075 }
2076
2077 fn paint_lines(
2078 &self,
2079 start_y: f32,
2080 lines: &[HighlightedRangeLine],
2081 bounds: RectF,
2082 scene: &mut Scene,
2083 ) {
2084 if lines.is_empty() {
2085 return;
2086 }
2087
2088 let mut path = PathBuilder::new();
2089 let first_line = lines.first().unwrap();
2090 let last_line = lines.last().unwrap();
2091
2092 let first_top_left = vec2f(first_line.start_x, start_y);
2093 let first_top_right = vec2f(first_line.end_x, start_y);
2094
2095 let curve_height = vec2f(0., self.corner_radius);
2096 let curve_width = |start_x: f32, end_x: f32| {
2097 let max = (end_x - start_x) / 2.;
2098 let width = if max < self.corner_radius {
2099 max
2100 } else {
2101 self.corner_radius
2102 };
2103
2104 vec2f(width, 0.)
2105 };
2106
2107 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2108 path.reset(first_top_right - top_curve_width);
2109 path.curve_to(first_top_right + curve_height, first_top_right);
2110
2111 let mut iter = lines.iter().enumerate().peekable();
2112 while let Some((ix, line)) = iter.next() {
2113 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2114
2115 if let Some((_, next_line)) = iter.peek() {
2116 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2117
2118 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2119 Ordering::Equal => {
2120 path.line_to(bottom_right);
2121 }
2122 Ordering::Less => {
2123 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2124 path.line_to(bottom_right - curve_height);
2125 if self.corner_radius > 0. {
2126 path.curve_to(bottom_right - curve_width, bottom_right);
2127 }
2128 path.line_to(next_top_right + curve_width);
2129 if self.corner_radius > 0. {
2130 path.curve_to(next_top_right + curve_height, next_top_right);
2131 }
2132 }
2133 Ordering::Greater => {
2134 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2135 path.line_to(bottom_right - curve_height);
2136 if self.corner_radius > 0. {
2137 path.curve_to(bottom_right + curve_width, bottom_right);
2138 }
2139 path.line_to(next_top_right - curve_width);
2140 if self.corner_radius > 0. {
2141 path.curve_to(next_top_right + curve_height, next_top_right);
2142 }
2143 }
2144 }
2145 } else {
2146 let curve_width = curve_width(line.start_x, line.end_x);
2147 path.line_to(bottom_right - curve_height);
2148 if self.corner_radius > 0. {
2149 path.curve_to(bottom_right - curve_width, bottom_right);
2150 }
2151
2152 let bottom_left = vec2f(line.start_x, bottom_right.y());
2153 path.line_to(bottom_left + curve_width);
2154 if self.corner_radius > 0. {
2155 path.curve_to(bottom_left - curve_height, bottom_left);
2156 }
2157 }
2158 }
2159
2160 if first_line.start_x > last_line.start_x {
2161 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2162 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2163 path.line_to(second_top_left + curve_height);
2164 if self.corner_radius > 0. {
2165 path.curve_to(second_top_left + curve_width, second_top_left);
2166 }
2167 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2168 path.line_to(first_bottom_left - curve_width);
2169 if self.corner_radius > 0. {
2170 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2171 }
2172 }
2173
2174 path.line_to(first_top_left + curve_height);
2175 if self.corner_radius > 0. {
2176 path.curve_to(first_top_left + top_curve_width, first_top_left);
2177 }
2178 path.line_to(first_top_right - top_curve_width);
2179
2180 scene.push_path(path.build(self.color, Some(bounds)));
2181 }
2182}
2183
2184pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2185 delta.powf(1.5) / 100.0
2186}
2187
2188fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2189 delta.powf(1.2) / 300.0
2190}
2191
2192#[cfg(test)]
2193mod tests {
2194 use std::sync::Arc;
2195
2196 use super::*;
2197 use crate::{
2198 display_map::{BlockDisposition, BlockProperties},
2199 Editor, MultiBuffer,
2200 };
2201 use settings::Settings;
2202 use util::test::sample_text;
2203
2204 #[gpui::test]
2205 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2206 cx.set_global(Settings::test(cx));
2207 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2208 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2209 Editor::new(EditorMode::Full, buffer, None, None, cx)
2210 });
2211 let element = EditorElement::new(
2212 editor.downgrade(),
2213 editor.read(cx).style(cx),
2214 CursorShape::Bar,
2215 );
2216
2217 let layouts = editor.update(cx, |editor, cx| {
2218 let snapshot = editor.snapshot(cx);
2219 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2220 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2221 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &layout_cx)
2222 });
2223 assert_eq!(layouts.len(), 6);
2224 }
2225
2226 #[gpui::test]
2227 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2228 cx.set_global(Settings::test(cx));
2229 let buffer = MultiBuffer::build_simple("", cx);
2230 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2231 Editor::new(EditorMode::Full, buffer, None, None, cx)
2232 });
2233
2234 editor.update(cx, |editor, cx| {
2235 editor.set_placeholder_text("hello", cx);
2236 editor.insert_blocks(
2237 [BlockProperties {
2238 style: BlockStyle::Fixed,
2239 disposition: BlockDisposition::Above,
2240 height: 3,
2241 position: Anchor::min(),
2242 render: Arc::new(|_| Empty::new().boxed()),
2243 }],
2244 cx,
2245 );
2246
2247 // Blur the editor so that it displays placeholder text.
2248 cx.blur();
2249 });
2250
2251 let mut element = EditorElement::new(
2252 editor.downgrade(),
2253 editor.read(cx).style(cx),
2254 CursorShape::Bar,
2255 );
2256
2257 let mut scene = Scene::new(1.0);
2258 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2259 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2260 let (size, mut state) = element.layout(
2261 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2262 &mut layout_cx,
2263 );
2264
2265 assert_eq!(state.position_map.line_layouts.len(), 4);
2266 assert_eq!(
2267 state
2268 .line_number_layouts
2269 .iter()
2270 .map(Option::is_some)
2271 .collect::<Vec<_>>(),
2272 &[false, false, false, true]
2273 );
2274
2275 // Don't panic.
2276 let bounds = RectF::new(Default::default(), size);
2277 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2278 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2279 }
2280}