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 gpui::{
20 color::Color,
21 elements::*,
22 fonts::{HighlightStyle, Underline},
23 geometry::{
24 rect::RectF,
25 vector::{vec2f, Vector2F},
26 PathBuilder,
27 },
28 json::{self, ToJson},
29 platform::CursorStyle,
30 text_layout::{self, Line, RunStyle, TextLayoutCache},
31 AppContext, Axis, Border, CursorRegion, Element, ElementBox, Event, EventContext,
32 LayoutContext, ModifiersChangedEvent, MouseButton, MouseButtonEvent, MouseMovedEvent,
33 MouseRegion, MutableAppContext, PaintContext, Quad, Scene, SizeConstraint, ViewContext,
34 WeakViewHandle,
35};
36use json::json;
37use language::git::{DiffHunk, DiffHunkStatus};
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};
49
50struct SelectionLayout {
51 head: DisplayPoint,
52 range: Range<DisplayPoint>,
53}
54
55impl SelectionLayout {
56 fn new<T: ToPoint + ToDisplayPoint + Clone>(
57 selection: Selection<T>,
58 line_mode: bool,
59 map: &DisplaySnapshot,
60 ) -> Self {
61 if line_mode {
62 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
63 let point_range = map.expand_to_line(selection.range());
64 Self {
65 head: selection.head().to_display_point(map),
66 range: point_range.start.to_display_point(map)
67 ..point_range.end.to_display_point(map),
68 }
69 } else {
70 let selection = selection.map(|p| p.to_display_point(map));
71 Self {
72 head: selection.head(),
73 range: selection.range(),
74 }
75 }
76 }
77}
78
79#[derive(Clone)]
80pub struct EditorElement {
81 view: WeakViewHandle<Editor>,
82 style: Arc<EditorStyle>,
83 cursor_shape: CursorShape,
84}
85
86impl EditorElement {
87 pub fn new(
88 view: WeakViewHandle<Editor>,
89 style: EditorStyle,
90 cursor_shape: CursorShape,
91 ) -> Self {
92 Self {
93 view,
94 style: Arc::new(style),
95 cursor_shape,
96 }
97 }
98
99 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
100 self.view.upgrade(cx).unwrap().read(cx)
101 }
102
103 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
104 where
105 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
106 {
107 self.view.upgrade(cx).unwrap().update(cx, f)
108 }
109
110 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
111 self.update_view(cx, |view, cx| view.snapshot(cx))
112 }
113
114 fn attach_mouse_handlers(
115 view: &WeakViewHandle<Editor>,
116 position_map: &Arc<PositionMap>,
117 visible_bounds: RectF,
118 text_bounds: RectF,
119 gutter_bounds: RectF,
120 bounds: RectF,
121 cx: &mut PaintContext,
122 ) {
123 enum EditorElementMouseHandlers {}
124 cx.scene.push_mouse_region(
125 MouseRegion::new::<EditorElementMouseHandlers>(view.id(), view.id(), visible_bounds)
126 .on_down(MouseButton::Left, {
127 let position_map = position_map.clone();
128 move |e, cx| {
129 if !Self::mouse_down(
130 e.platform_event,
131 position_map.as_ref(),
132 text_bounds,
133 gutter_bounds,
134 cx,
135 ) {
136 cx.propogate_event();
137 }
138 }
139 })
140 .on_down(MouseButton::Right, {
141 let position_map = position_map.clone();
142 move |e, cx| {
143 if !Self::mouse_right_down(
144 e.position,
145 position_map.as_ref(),
146 text_bounds,
147 cx,
148 ) {
149 cx.propogate_event();
150 }
151 }
152 })
153 .on_up(MouseButton::Left, {
154 let view = view.clone();
155 let position_map = position_map.clone();
156 move |e, cx| {
157 if !Self::mouse_up(
158 view.clone(),
159 e.position,
160 e.cmd,
161 e.shift,
162 position_map.as_ref(),
163 text_bounds,
164 cx,
165 ) {
166 cx.propogate_event()
167 }
168 }
169 })
170 .on_drag(MouseButton::Left, {
171 let view = view.clone();
172 let position_map = position_map.clone();
173 move |e, cx| {
174 if !Self::mouse_dragged(
175 view.clone(),
176 e.platform_event,
177 position_map.as_ref(),
178 text_bounds,
179 cx,
180 ) {
181 cx.propogate_event()
182 }
183 }
184 })
185 .on_move({
186 let position_map = position_map.clone();
187 move |e, cx| {
188 if !Self::mouse_moved(e.platform_event, &position_map, text_bounds, cx) {
189 cx.propogate_event()
190 }
191 }
192 })
193 .on_scroll({
194 let position_map = position_map.clone();
195 move |e, cx| {
196 if !Self::scroll(e.position, e.delta, e.precise, &position_map, bounds, cx)
197 {
198 cx.propogate_event()
199 }
200 }
201 }),
202 );
203 }
204
205 fn mouse_down(
206 MouseButtonEvent {
207 position,
208 ctrl,
209 alt,
210 shift,
211 cmd,
212 mut click_count,
213 ..
214 }: MouseButtonEvent,
215 position_map: &PositionMap,
216 text_bounds: RectF,
217 gutter_bounds: RectF,
218 cx: &mut EventContext,
219 ) -> bool {
220 if gutter_bounds.contains_point(position) {
221 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
222 } else if !text_bounds.contains_point(position) {
223 return false;
224 }
225
226 let (position, target_position) = position_map.point_for_position(text_bounds, position);
227
228 if shift && alt {
229 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
230 position,
231 goal_column: target_position.column(),
232 }));
233 } else if shift && !ctrl && !alt && !cmd {
234 cx.dispatch_action(Select(SelectPhase::Extend {
235 position,
236 click_count,
237 }));
238 } else {
239 cx.dispatch_action(Select(SelectPhase::Begin {
240 position,
241 add: alt,
242 click_count,
243 }));
244 }
245
246 true
247 }
248
249 fn mouse_right_down(
250 position: Vector2F,
251 position_map: &PositionMap,
252 text_bounds: RectF,
253 cx: &mut EventContext,
254 ) -> bool {
255 if !text_bounds.contains_point(position) {
256 return false;
257 }
258
259 let (point, _) = position_map.point_for_position(text_bounds, position);
260
261 cx.dispatch_action(DeployMouseContextMenu { position, point });
262 true
263 }
264
265 fn mouse_up(
266 view: WeakViewHandle<Editor>,
267 position: Vector2F,
268 cmd: bool,
269 shift: bool,
270 position_map: &PositionMap,
271 text_bounds: RectF,
272 cx: &mut EventContext,
273 ) -> bool {
274 let view = view.upgrade(cx.app).unwrap().read(cx.app);
275 let end_selection = view.has_pending_selection();
276 let pending_nonempty_selections = view.has_pending_nonempty_selection();
277
278 if end_selection {
279 cx.dispatch_action(Select(SelectPhase::End));
280 }
281
282 if !pending_nonempty_selections && cmd && text_bounds.contains_point(position) {
283 let (point, target_point) = position_map.point_for_position(text_bounds, position);
284
285 if point == target_point {
286 if shift {
287 cx.dispatch_action(GoToFetchedTypeDefinition { point });
288 } else {
289 cx.dispatch_action(GoToFetchedDefinition { point });
290 }
291
292 return true;
293 }
294 }
295
296 end_selection
297 }
298
299 fn mouse_dragged(
300 view: WeakViewHandle<Editor>,
301 MouseMovedEvent {
302 cmd,
303 shift,
304 position,
305 ..
306 }: MouseMovedEvent,
307 position_map: &PositionMap,
308 text_bounds: RectF,
309 cx: &mut EventContext,
310 ) -> bool {
311 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
312 // Don't trigger hover popover if mouse is hovering over context menu
313 let point = if text_bounds.contains_point(position) {
314 let (point, target_point) = position_map.point_for_position(text_bounds, position);
315 if point == target_point {
316 Some(point)
317 } else {
318 None
319 }
320 } else {
321 None
322 };
323
324 cx.dispatch_action(UpdateGoToDefinitionLink {
325 point,
326 cmd_held: cmd,
327 shift_held: shift,
328 });
329
330 let view = view.upgrade(cx.app).unwrap().read(cx.app);
331 if view.has_pending_selection() {
332 let mut scroll_delta = Vector2F::zero();
333
334 let vertical_margin = position_map.line_height.min(text_bounds.height() / 3.0);
335 let top = text_bounds.origin_y() + vertical_margin;
336 let bottom = text_bounds.lower_left().y() - vertical_margin;
337 if position.y() < top {
338 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
339 }
340 if position.y() > bottom {
341 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
342 }
343
344 let horizontal_margin = position_map.line_height.min(text_bounds.width() / 3.0);
345 let left = text_bounds.origin_x() + horizontal_margin;
346 let right = text_bounds.upper_right().x() - horizontal_margin;
347 if position.x() < left {
348 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
349 left - position.x(),
350 ))
351 }
352 if position.x() > right {
353 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
354 position.x() - right,
355 ))
356 }
357
358 let (position, target_position) =
359 position_map.point_for_position(text_bounds, position);
360
361 cx.dispatch_action(Select(SelectPhase::Update {
362 position,
363 goal_column: target_position.column(),
364 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
365 .clamp(Vector2F::zero(), position_map.scroll_max),
366 }));
367
368 cx.dispatch_action(HoverAt { point });
369 true
370 } else {
371 cx.dispatch_action(HoverAt { point });
372 false
373 }
374 }
375
376 fn mouse_moved(
377 MouseMovedEvent {
378 cmd,
379 shift,
380 position,
381 ..
382 }: MouseMovedEvent,
383 position_map: &PositionMap,
384 text_bounds: RectF,
385 cx: &mut EventContext,
386 ) -> bool {
387 // This will be handled more correctly once https://github.com/zed-industries/zed/issues/1218 is completed
388 // Don't trigger hover popover if mouse is hovering over context menu
389 let point = if text_bounds.contains_point(position) {
390 let (point, target_point) = position_map.point_for_position(text_bounds, position);
391 if point == target_point {
392 Some(point)
393 } else {
394 None
395 }
396 } else {
397 None
398 };
399
400 cx.dispatch_action(UpdateGoToDefinitionLink {
401 point,
402 cmd_held: cmd,
403 shift_held: shift,
404 });
405
406 cx.dispatch_action(HoverAt { point });
407 true
408 }
409
410 fn modifiers_changed(&self, event: ModifiersChangedEvent, cx: &mut EventContext) -> bool {
411 cx.dispatch_action(CmdShiftChanged {
412 cmd_down: event.cmd,
413 shift_down: event.shift,
414 });
415 false
416 }
417
418 fn scroll(
419 position: Vector2F,
420 mut delta: Vector2F,
421 precise: bool,
422 position_map: &PositionMap,
423 bounds: RectF,
424 cx: &mut EventContext,
425 ) -> bool {
426 if !bounds.contains_point(position) {
427 return false;
428 }
429
430 let max_glyph_width = position_map.em_width;
431 if !precise {
432 delta *= vec2f(max_glyph_width, position_map.line_height);
433 }
434
435 let scroll_position = position_map.snapshot.scroll_position();
436 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
437 let y =
438 (scroll_position.y() * position_map.line_height - delta.y()) / position_map.line_height;
439 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), position_map.scroll_max);
440
441 cx.dispatch_action(Scroll(scroll_position));
442
443 true
444 }
445
446 fn paint_background(
447 &self,
448 gutter_bounds: RectF,
449 text_bounds: RectF,
450 layout: &LayoutState,
451 cx: &mut PaintContext,
452 ) {
453 let bounds = gutter_bounds.union_rect(text_bounds);
454 let scroll_top =
455 layout.position_map.snapshot.scroll_position().y() * layout.position_map.line_height;
456 let editor = self.view(cx.app);
457 cx.scene.push_quad(Quad {
458 bounds: gutter_bounds,
459 background: Some(self.style.gutter_background),
460 border: Border::new(0., Color::transparent_black()),
461 corner_radius: 0.,
462 });
463 cx.scene.push_quad(Quad {
464 bounds: text_bounds,
465 background: Some(self.style.background),
466 border: Border::new(0., Color::transparent_black()),
467 corner_radius: 0.,
468 });
469
470 if let EditorMode::Full = editor.mode {
471 let mut active_rows = layout.active_rows.iter().peekable();
472 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
473 let mut end_row = *start_row;
474 while active_rows.peek().map_or(false, |r| {
475 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
476 }) {
477 active_rows.next().unwrap();
478 end_row += 1;
479 }
480
481 if !contains_non_empty_selection {
482 let origin = vec2f(
483 bounds.origin_x(),
484 bounds.origin_y() + (layout.position_map.line_height * *start_row as f32)
485 - scroll_top,
486 );
487 let size = vec2f(
488 bounds.width(),
489 layout.position_map.line_height * (end_row - start_row + 1) as f32,
490 );
491 cx.scene.push_quad(Quad {
492 bounds: RectF::new(origin, size),
493 background: Some(self.style.active_line_background),
494 border: Border::default(),
495 corner_radius: 0.,
496 });
497 }
498 }
499
500 if let Some(highlighted_rows) = &layout.highlighted_rows {
501 let origin = vec2f(
502 bounds.origin_x(),
503 bounds.origin_y()
504 + (layout.position_map.line_height * highlighted_rows.start as f32)
505 - scroll_top,
506 );
507 let size = vec2f(
508 bounds.width(),
509 layout.position_map.line_height * highlighted_rows.len() as f32,
510 );
511 cx.scene.push_quad(Quad {
512 bounds: RectF::new(origin, size),
513 background: Some(self.style.highlighted_line_background),
514 border: Border::default(),
515 corner_radius: 0.,
516 });
517 }
518 }
519 }
520
521 fn paint_gutter(
522 &mut self,
523 bounds: RectF,
524 visible_bounds: RectF,
525 layout: &mut LayoutState,
526 cx: &mut PaintContext,
527 ) {
528 let line_height = layout.position_map.line_height;
529 let scroll_position = layout.position_map.snapshot.scroll_position();
530 let scroll_top = scroll_position.y() * line_height;
531 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
532 if let Some(line) = line {
533 let line_origin = bounds.origin()
534 + vec2f(
535 bounds.width() - line.width() - layout.gutter_padding,
536 ix as f32 * layout.position_map.line_height
537 - (scroll_top % layout.position_map.line_height),
538 );
539 line.paint(
540 line_origin,
541 visible_bounds,
542 layout.position_map.line_height,
543 cx,
544 );
545 }
546 }
547
548 let (inserted_color, modified_color, deleted_color) = {
549 let editor = &cx.global::<Settings>().theme.editor;
550 (
551 editor.diff_background_inserted,
552 editor.diff_background_modified,
553 editor.diff_background_deleted,
554 )
555 };
556
557 for hunk in &layout.diff_hunks {
558 let color = match hunk.status() {
559 DiffHunkStatus::Added => inserted_color,
560 DiffHunkStatus::Modified => modified_color,
561
562 //TODO: This rendering is entirely a horrible hack
563 DiffHunkStatus::Removed => {
564 let row = hunk.buffer_range.start;
565
566 let offset = line_height / 2.;
567 let start_y = row as f32 * line_height + offset - scroll_top;
568 let end_y = start_y + line_height;
569
570 let width = 0.4 * line_height;
571 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
572 let highlight_size = vec2f(width * 2., end_y - start_y);
573 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
574
575 cx.scene.push_quad(Quad {
576 bounds: highlight_bounds,
577 background: Some(deleted_color),
578 border: Border::new(0., Color::transparent_black()),
579 corner_radius: 1. * line_height,
580 });
581
582 continue;
583 }
584 };
585
586 let start_row = hunk.buffer_range.start;
587 let end_row = hunk.buffer_range.end;
588
589 let start_y = start_row as f32 * line_height - scroll_top;
590 let end_y = end_row as f32 * line_height - scroll_top;
591
592 let width = 0.22 * line_height;
593 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
594 let highlight_size = vec2f(width * 2., end_y - start_y);
595 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
596
597 cx.scene.push_quad(Quad {
598 bounds: highlight_bounds,
599 background: Some(color),
600 border: Border::new(0., Color::transparent_black()),
601 corner_radius: 0.2 * line_height,
602 });
603 }
604
605 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
606 let mut x = bounds.width() - layout.gutter_padding;
607 let mut y = *row as f32 * line_height - scroll_top;
608 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
609 y += (line_height - indicator.size().y()) / 2.;
610 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
611 }
612 }
613
614 fn paint_text(
615 &mut self,
616 bounds: RectF,
617 visible_bounds: RectF,
618 layout: &mut LayoutState,
619 cx: &mut PaintContext,
620 ) {
621 let view = self.view(cx.app);
622 let style = &self.style;
623 let local_replica_id = view.replica_id(cx);
624 let scroll_position = layout.position_map.snapshot.scroll_position();
625 let start_row = scroll_position.y() as u32;
626 let scroll_top = scroll_position.y() * layout.position_map.line_height;
627 let end_row =
628 ((scroll_top + bounds.height()) / layout.position_map.line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
629 let max_glyph_width = layout.position_map.em_width;
630 let scroll_left = scroll_position.x() * max_glyph_width;
631 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
632
633 cx.scene.push_layer(Some(bounds));
634
635 cx.scene.push_cursor_region(CursorRegion {
636 bounds,
637 style: if !view.link_go_to_definition_state.definitions.is_empty() {
638 CursorStyle::PointingHand
639 } else {
640 CursorStyle::IBeam
641 },
642 });
643
644 for (range, color) in &layout.highlighted_ranges {
645 self.paint_highlighted_range(
646 range.clone(),
647 start_row,
648 end_row,
649 *color,
650 0.,
651 0.15 * layout.position_map.line_height,
652 layout,
653 content_origin,
654 scroll_top,
655 scroll_left,
656 bounds,
657 cx,
658 );
659 }
660
661 let mut cursors = SmallVec::<[Cursor; 32]>::new();
662 for (replica_id, selections) in &layout.selections {
663 let selection_style = style.replica_selection_style(*replica_id);
664 let corner_radius = 0.15 * layout.position_map.line_height;
665
666 for selection in selections {
667 self.paint_highlighted_range(
668 selection.range.clone(),
669 start_row,
670 end_row,
671 selection_style.selection,
672 corner_radius,
673 corner_radius * 2.,
674 layout,
675 content_origin,
676 scroll_top,
677 scroll_left,
678 bounds,
679 cx,
680 );
681
682 if view.show_local_cursors() || *replica_id != local_replica_id {
683 let cursor_position = selection.head;
684 if (start_row..end_row).contains(&cursor_position.row()) {
685 let cursor_row_layout = &layout.position_map.line_layouts
686 [(cursor_position.row() - start_row) as usize];
687 let cursor_column = cursor_position.column() as usize;
688
689 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
690 let mut block_width =
691 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
692 if block_width == 0.0 {
693 block_width = layout.position_map.em_width;
694 }
695 let block_text = if let CursorShape::Block = self.cursor_shape {
696 layout
697 .position_map
698 .snapshot
699 .chars_at(cursor_position)
700 .next()
701 .and_then(|character| {
702 let font_id =
703 cursor_row_layout.font_for_index(cursor_column)?;
704 let text = character.to_string();
705
706 Some(cx.text_layout_cache.layout_str(
707 &text,
708 cursor_row_layout.font_size(),
709 &[(
710 text.len(),
711 RunStyle {
712 font_id,
713 color: style.background,
714 underline: Default::default(),
715 },
716 )],
717 ))
718 })
719 } else {
720 None
721 };
722
723 let x = cursor_character_x - scroll_left;
724 let y = cursor_position.row() as f32 * layout.position_map.line_height
725 - scroll_top;
726 cursors.push(Cursor {
727 color: selection_style.cursor,
728 block_width,
729 origin: vec2f(x, y),
730 line_height: layout.position_map.line_height,
731 shape: self.cursor_shape,
732 block_text,
733 });
734 }
735 }
736 }
737 }
738
739 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
740 // Draw glyphs
741 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
742 let row = start_row + ix as u32;
743 line.paint(
744 content_origin
745 + vec2f(
746 -scroll_left,
747 row as f32 * layout.position_map.line_height - scroll_top,
748 ),
749 visible_text_bounds,
750 layout.position_map.line_height,
751 cx,
752 );
753 }
754 }
755
756 cx.scene.push_layer(Some(bounds));
757 for cursor in cursors {
758 cursor.paint(content_origin, cx);
759 }
760 cx.scene.pop_layer();
761
762 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
763 cx.scene.push_stacking_context(None);
764 let cursor_row_layout =
765 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
766 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
767 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
768 let mut list_origin = content_origin + vec2f(x, y);
769 let list_width = context_menu.size().x();
770 let list_height = context_menu.size().y();
771
772 // Snap the right edge of the list to the right edge of the window if
773 // its horizontal bounds overflow.
774 if list_origin.x() + list_width > cx.window_size.x() {
775 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
776 }
777
778 if list_origin.y() + list_height > bounds.max_y() {
779 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
780 }
781
782 context_menu.paint(
783 list_origin,
784 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
785 cx,
786 );
787
788 cx.scene.pop_stacking_context();
789 }
790
791 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
792 cx.scene.push_stacking_context(None);
793
794 // This is safe because we check on layout whether the required row is available
795 let hovered_row_layout =
796 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
797
798 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
799 // height. This is the size we will use to decide whether to render popovers above or below
800 // the hovered line.
801 let first_size = hover_popovers[0].size();
802 let height_to_reserve = first_size.y()
803 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
804
805 // Compute Hovered Point
806 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
807 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
808 let hovered_point = content_origin + vec2f(x, y);
809
810 if hovered_point.y() - height_to_reserve > 0.0 {
811 // There is enough space above. Render popovers above the hovered point
812 let mut current_y = hovered_point.y();
813 for hover_popover in hover_popovers {
814 let size = hover_popover.size();
815 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
816
817 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
818 if x_out_of_bounds < 0.0 {
819 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
820 }
821
822 hover_popover.paint(
823 popover_origin,
824 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
825 cx,
826 );
827
828 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
829 }
830 } else {
831 // There is not enough space above. Render popovers below the hovered point
832 let mut current_y = hovered_point.y() + layout.position_map.line_height;
833 for hover_popover in hover_popovers {
834 let size = hover_popover.size();
835 let mut popover_origin = vec2f(hovered_point.x(), current_y);
836
837 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
838 if x_out_of_bounds < 0.0 {
839 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
840 }
841
842 hover_popover.paint(
843 popover_origin,
844 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
845 cx,
846 );
847
848 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
849 }
850 }
851
852 cx.scene.pop_stacking_context();
853 }
854
855 cx.scene.pop_layer();
856 }
857
858 #[allow(clippy::too_many_arguments)]
859 fn paint_highlighted_range(
860 &self,
861 range: Range<DisplayPoint>,
862 start_row: u32,
863 end_row: u32,
864 color: Color,
865 corner_radius: f32,
866 line_end_overshoot: f32,
867 layout: &LayoutState,
868 content_origin: Vector2F,
869 scroll_top: f32,
870 scroll_left: f32,
871 bounds: RectF,
872 cx: &mut PaintContext,
873 ) {
874 if range.start != range.end {
875 let row_range = if range.end.column() == 0 {
876 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
877 } else {
878 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
879 };
880
881 let highlighted_range = HighlightedRange {
882 color,
883 line_height: layout.position_map.line_height,
884 corner_radius,
885 start_y: content_origin.y()
886 + row_range.start as f32 * layout.position_map.line_height
887 - scroll_top,
888 lines: row_range
889 .into_iter()
890 .map(|row| {
891 let line_layout =
892 &layout.position_map.line_layouts[(row - start_row) as usize];
893 HighlightedRangeLine {
894 start_x: if row == range.start.row() {
895 content_origin.x()
896 + line_layout.x_for_index(range.start.column() as usize)
897 - scroll_left
898 } else {
899 content_origin.x() - scroll_left
900 },
901 end_x: if row == range.end.row() {
902 content_origin.x()
903 + line_layout.x_for_index(range.end.column() as usize)
904 - scroll_left
905 } else {
906 content_origin.x() + line_layout.width() + line_end_overshoot
907 - scroll_left
908 },
909 }
910 })
911 .collect(),
912 };
913
914 highlighted_range.paint(bounds, cx.scene);
915 }
916 }
917
918 fn paint_blocks(
919 &mut self,
920 bounds: RectF,
921 visible_bounds: RectF,
922 layout: &mut LayoutState,
923 cx: &mut PaintContext,
924 ) {
925 let scroll_position = layout.position_map.snapshot.scroll_position();
926 let scroll_left = scroll_position.x() * layout.position_map.em_width;
927 let scroll_top = scroll_position.y() * layout.position_map.line_height;
928
929 for block in &mut layout.blocks {
930 let mut origin = bounds.origin()
931 + vec2f(
932 0.,
933 block.row as f32 * layout.position_map.line_height - scroll_top,
934 );
935 if !matches!(block.style, BlockStyle::Sticky) {
936 origin += vec2f(-scroll_left, 0.);
937 }
938 block.element.paint(origin, visible_bounds, cx);
939 }
940 }
941
942 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
943 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
944 let style = &self.style;
945
946 cx.text_layout_cache
947 .layout_str(
948 "1".repeat(digit_count).as_str(),
949 style.text.font_size,
950 &[(
951 digit_count,
952 RunStyle {
953 font_id: style.text.font_id,
954 color: Color::black(),
955 underline: Default::default(),
956 },
957 )],
958 )
959 .width()
960 }
961
962 fn layout_line_numbers(
963 &self,
964 rows: Range<u32>,
965 active_rows: &BTreeMap<u32, bool>,
966 snapshot: &EditorSnapshot,
967 cx: &LayoutContext,
968 ) -> Vec<Option<text_layout::Line>> {
969 let style = &self.style;
970 let include_line_numbers = snapshot.mode == EditorMode::Full;
971 let mut line_number_layouts = Vec::with_capacity(rows.len());
972 let mut line_number = String::new();
973 for (ix, row) in snapshot
974 .buffer_rows(rows.start)
975 .take((rows.end - rows.start) as usize)
976 .enumerate()
977 {
978 let display_row = rows.start + ix as u32;
979 let color = if active_rows.contains_key(&display_row) {
980 style.line_number_active
981 } else {
982 style.line_number
983 };
984 if let Some(buffer_row) = row {
985 if include_line_numbers {
986 line_number.clear();
987 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
988 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
989 &line_number,
990 style.text.font_size,
991 &[(
992 line_number.len(),
993 RunStyle {
994 font_id: style.text.font_id,
995 color,
996 underline: Default::default(),
997 },
998 )],
999 )));
1000 }
1001 } else {
1002 line_number_layouts.push(None);
1003 }
1004 }
1005
1006 line_number_layouts
1007 }
1008
1009 fn layout_lines(
1010 &mut self,
1011 rows: Range<u32>,
1012 snapshot: &EditorSnapshot,
1013 cx: &LayoutContext,
1014 ) -> Vec<text_layout::Line> {
1015 if rows.start >= rows.end {
1016 return Vec::new();
1017 }
1018
1019 // When the editor is empty and unfocused, then show the placeholder.
1020 if snapshot.is_empty() && !snapshot.is_focused() {
1021 let placeholder_style = self
1022 .style
1023 .placeholder_text
1024 .as_ref()
1025 .unwrap_or(&self.style.text);
1026 let placeholder_text = snapshot.placeholder_text();
1027 let placeholder_lines = placeholder_text
1028 .as_ref()
1029 .map_or("", AsRef::as_ref)
1030 .split('\n')
1031 .skip(rows.start as usize)
1032 .chain(iter::repeat(""))
1033 .take(rows.len());
1034 placeholder_lines
1035 .map(|line| {
1036 cx.text_layout_cache.layout_str(
1037 line,
1038 placeholder_style.font_size,
1039 &[(
1040 line.len(),
1041 RunStyle {
1042 font_id: placeholder_style.font_id,
1043 color: placeholder_style.color,
1044 underline: Default::default(),
1045 },
1046 )],
1047 )
1048 })
1049 .collect()
1050 } else {
1051 let style = &self.style;
1052 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1053 let mut highlight_style = chunk
1054 .syntax_highlight_id
1055 .and_then(|id| id.style(&style.syntax));
1056
1057 if let Some(chunk_highlight) = chunk.highlight_style {
1058 if let Some(highlight_style) = highlight_style.as_mut() {
1059 highlight_style.highlight(chunk_highlight);
1060 } else {
1061 highlight_style = Some(chunk_highlight);
1062 }
1063 }
1064
1065 let mut diagnostic_highlight = HighlightStyle::default();
1066
1067 if chunk.is_unnecessary {
1068 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1069 }
1070
1071 if let Some(severity) = chunk.diagnostic_severity {
1072 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1073 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1074 let diagnostic_style = super::diagnostic_style(severity, true, style);
1075 diagnostic_highlight.underline = Some(Underline {
1076 color: Some(diagnostic_style.message.text.color),
1077 thickness: 1.0.into(),
1078 squiggly: true,
1079 });
1080 }
1081 }
1082
1083 if let Some(highlight_style) = highlight_style.as_mut() {
1084 highlight_style.highlight(diagnostic_highlight);
1085 } else {
1086 highlight_style = Some(diagnostic_highlight);
1087 }
1088
1089 (chunk.text, highlight_style)
1090 });
1091 layout_highlighted_chunks(
1092 chunks,
1093 &style.text,
1094 cx.text_layout_cache,
1095 cx.font_cache,
1096 MAX_LINE_LEN,
1097 rows.len() as usize,
1098 )
1099 }
1100 }
1101
1102 #[allow(clippy::too_many_arguments)]
1103 fn layout_blocks(
1104 &mut self,
1105 rows: Range<u32>,
1106 snapshot: &EditorSnapshot,
1107 editor_width: f32,
1108 scroll_width: f32,
1109 gutter_padding: f32,
1110 gutter_width: f32,
1111 em_width: f32,
1112 text_x: f32,
1113 line_height: f32,
1114 style: &EditorStyle,
1115 line_layouts: &[text_layout::Line],
1116 cx: &mut LayoutContext,
1117 ) -> (f32, Vec<BlockLayout>) {
1118 let editor = if let Some(editor) = self.view.upgrade(cx) {
1119 editor
1120 } else {
1121 return Default::default();
1122 };
1123
1124 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1125 let scroll_x = snapshot.scroll_position.x();
1126 let (fixed_blocks, non_fixed_blocks) = snapshot
1127 .blocks_in_range(rows.clone())
1128 .partition::<Vec<_>, _>(|(_, block)| match block {
1129 TransformBlock::ExcerptHeader { .. } => false,
1130 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1131 });
1132 let mut render_block = |block: &TransformBlock, width: f32| {
1133 let mut element = match block {
1134 TransformBlock::Custom(block) => {
1135 let align_to = block
1136 .position()
1137 .to_point(&snapshot.buffer_snapshot)
1138 .to_display_point(snapshot);
1139 let anchor_x = text_x
1140 + if rows.contains(&align_to.row()) {
1141 line_layouts[(align_to.row() - rows.start) as usize]
1142 .x_for_index(align_to.column() as usize)
1143 } else {
1144 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1145 .x_for_index(align_to.column() as usize)
1146 };
1147
1148 cx.render(&editor, |_, cx| {
1149 block.render(&mut BlockContext {
1150 cx,
1151 anchor_x,
1152 gutter_padding,
1153 line_height,
1154 scroll_x,
1155 gutter_width,
1156 em_width,
1157 })
1158 })
1159 }
1160 TransformBlock::ExcerptHeader {
1161 key,
1162 buffer,
1163 range,
1164 starts_new_buffer,
1165 ..
1166 } => {
1167 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1168 let jump_position = range
1169 .primary
1170 .as_ref()
1171 .map_or(range.context.start, |primary| primary.start);
1172 let jump_action = crate::Jump {
1173 path: ProjectPath {
1174 worktree_id: file.worktree_id(cx),
1175 path: file.path.clone(),
1176 },
1177 position: language::ToPoint::to_point(&jump_position, buffer),
1178 anchor: jump_position,
1179 };
1180
1181 enum JumpIcon {}
1182 cx.render(&editor, |_, cx| {
1183 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1184 let style = style.jump_icon.style_for(state, false);
1185 Svg::new("icons/arrow_up_right_8.svg")
1186 .with_color(style.color)
1187 .constrained()
1188 .with_width(style.icon_width)
1189 .aligned()
1190 .contained()
1191 .with_style(style.container)
1192 .constrained()
1193 .with_width(style.button_width)
1194 .with_height(style.button_width)
1195 .boxed()
1196 })
1197 .with_cursor_style(CursorStyle::PointingHand)
1198 .on_click(MouseButton::Left, move |_, cx| {
1199 cx.dispatch_action(jump_action.clone())
1200 })
1201 .with_tooltip::<JumpIcon, _>(
1202 *key,
1203 "Jump to Buffer".to_string(),
1204 Some(Box::new(crate::OpenExcerpts)),
1205 tooltip_style.clone(),
1206 cx,
1207 )
1208 .aligned()
1209 .flex_float()
1210 .boxed()
1211 })
1212 });
1213
1214 if *starts_new_buffer {
1215 let style = &self.style.diagnostic_path_header;
1216 let font_size =
1217 (style.text_scale_factor * self.style.text.font_size).round();
1218
1219 let mut filename = None;
1220 let mut parent_path = None;
1221 if let Some(file) = buffer.file() {
1222 let path = file.path();
1223 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1224 parent_path =
1225 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1226 }
1227
1228 Flex::row()
1229 .with_child(
1230 Label::new(
1231 filename.unwrap_or_else(|| "untitled".to_string()),
1232 style.filename.text.clone().with_font_size(font_size),
1233 )
1234 .contained()
1235 .with_style(style.filename.container)
1236 .aligned()
1237 .boxed(),
1238 )
1239 .with_children(parent_path.map(|path| {
1240 Label::new(path, style.path.text.clone().with_font_size(font_size))
1241 .contained()
1242 .with_style(style.path.container)
1243 .aligned()
1244 .boxed()
1245 }))
1246 .with_children(jump_icon)
1247 .contained()
1248 .with_style(style.container)
1249 .with_padding_left(gutter_padding)
1250 .with_padding_right(gutter_padding)
1251 .expanded()
1252 .named("path header block")
1253 } else {
1254 let text_style = self.style.text.clone();
1255 Flex::row()
1256 .with_child(Label::new("…".to_string(), text_style).boxed())
1257 .with_children(jump_icon)
1258 .contained()
1259 .with_padding_left(gutter_padding)
1260 .with_padding_right(gutter_padding)
1261 .expanded()
1262 .named("collapsed context")
1263 }
1264 }
1265 };
1266
1267 element.layout(
1268 SizeConstraint {
1269 min: Vector2F::zero(),
1270 max: vec2f(width, block.height() as f32 * line_height),
1271 },
1272 cx,
1273 );
1274 element
1275 };
1276
1277 let mut fixed_block_max_width = 0f32;
1278 let mut blocks = Vec::new();
1279 for (row, block) in fixed_blocks {
1280 let element = render_block(block, f32::INFINITY);
1281 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1282 blocks.push(BlockLayout {
1283 row,
1284 element,
1285 style: BlockStyle::Fixed,
1286 });
1287 }
1288 for (row, block) in non_fixed_blocks {
1289 let style = match block {
1290 TransformBlock::Custom(block) => block.style(),
1291 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1292 };
1293 let width = match style {
1294 BlockStyle::Sticky => editor_width,
1295 BlockStyle::Flex => editor_width
1296 .max(fixed_block_max_width)
1297 .max(gutter_width + scroll_width),
1298 BlockStyle::Fixed => unreachable!(),
1299 };
1300 let element = render_block(block, width);
1301 blocks.push(BlockLayout {
1302 row,
1303 element,
1304 style,
1305 });
1306 }
1307 (
1308 scroll_width.max(fixed_block_max_width - gutter_width),
1309 blocks,
1310 )
1311 }
1312}
1313
1314impl Element for EditorElement {
1315 type LayoutState = LayoutState;
1316 type PaintState = ();
1317
1318 fn layout(
1319 &mut self,
1320 constraint: SizeConstraint,
1321 cx: &mut LayoutContext,
1322 ) -> (Vector2F, Self::LayoutState) {
1323 let mut size = constraint.max;
1324 if size.x().is_infinite() {
1325 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1326 }
1327
1328 let snapshot = self.snapshot(cx.app);
1329 let style = self.style.clone();
1330 let line_height = style.text.line_height(cx.font_cache);
1331
1332 let gutter_padding;
1333 let gutter_width;
1334 let gutter_margin;
1335 if snapshot.mode == EditorMode::Full {
1336 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1337 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1338 gutter_margin = -style.text.descent(cx.font_cache);
1339 } else {
1340 gutter_padding = 0.0;
1341 gutter_width = 0.0;
1342 gutter_margin = 0.0;
1343 };
1344
1345 let text_width = size.x() - gutter_width;
1346 let em_width = style.text.em_width(cx.font_cache);
1347 let em_advance = style.text.em_advance(cx.font_cache);
1348 let overscroll = vec2f(em_width, 0.);
1349 let snapshot = self.update_view(cx.app, |view, cx| {
1350 let wrap_width = match view.soft_wrap_mode(cx) {
1351 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1352 SoftWrap::EditorWidth => {
1353 Some(text_width - gutter_margin - overscroll.x() - em_width)
1354 }
1355 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1356 };
1357
1358 if view.set_wrap_width(wrap_width, cx) {
1359 view.snapshot(cx)
1360 } else {
1361 snapshot
1362 }
1363 });
1364
1365 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1366 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1367 size.set_y(
1368 scroll_height
1369 .min(constraint.max_along(Axis::Vertical))
1370 .max(constraint.min_along(Axis::Vertical))
1371 .min(line_height * max_lines as f32),
1372 )
1373 } else if let EditorMode::SingleLine = snapshot.mode {
1374 size.set_y(
1375 line_height
1376 .min(constraint.max_along(Axis::Vertical))
1377 .max(constraint.min_along(Axis::Vertical)),
1378 )
1379 } else if size.y().is_infinite() {
1380 size.set_y(scroll_height);
1381 }
1382 let gutter_size = vec2f(gutter_width, size.y());
1383 let text_size = vec2f(text_width, size.y());
1384
1385 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1386 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1387 let snapshot = view.snapshot(cx);
1388 (autoscroll_horizontally, snapshot)
1389 });
1390
1391 let scroll_position = snapshot.scroll_position();
1392 // The scroll position is a fractional point, the whole number of which represents
1393 // the top of the window in terms of display rows.
1394 let start_row = scroll_position.y() as u32;
1395 let scroll_top = scroll_position.y() * line_height;
1396
1397 // Add 1 to ensure selections bleed off screen
1398 let end_row = 1 + cmp::min(
1399 ((scroll_top + size.y()) / line_height).ceil() as u32,
1400 snapshot.max_point().row(),
1401 );
1402
1403 let start_anchor = if start_row == 0 {
1404 Anchor::min()
1405 } else {
1406 snapshot
1407 .buffer_snapshot
1408 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1409 };
1410 let end_anchor = if end_row > snapshot.max_point().row() {
1411 Anchor::max()
1412 } else {
1413 snapshot
1414 .buffer_snapshot
1415 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1416 };
1417
1418 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1419 let mut active_rows = BTreeMap::new();
1420 let mut highlighted_rows = None;
1421 let mut highlighted_ranges = Vec::new();
1422 self.update_view(cx.app, |view, cx| {
1423 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1424
1425 highlighted_rows = view.highlighted_rows();
1426 let theme = cx.global::<Settings>().theme.as_ref();
1427 highlighted_ranges = view.background_highlights_in_range(
1428 start_anchor.clone()..end_anchor.clone(),
1429 &display_map,
1430 theme,
1431 );
1432
1433 let mut remote_selections = HashMap::default();
1434 for (replica_id, line_mode, selection) in display_map
1435 .buffer_snapshot
1436 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1437 {
1438 // The local selections match the leader's selections.
1439 if Some(replica_id) == view.leader_replica_id {
1440 continue;
1441 }
1442 remote_selections
1443 .entry(replica_id)
1444 .or_insert(Vec::new())
1445 .push(SelectionLayout::new(selection, line_mode, &display_map));
1446 }
1447 selections.extend(remote_selections);
1448
1449 if view.show_local_selections {
1450 let mut local_selections = view
1451 .selections
1452 .disjoint_in_range(start_anchor..end_anchor, cx);
1453 local_selections.extend(view.selections.pending(cx));
1454 for selection in &local_selections {
1455 let is_empty = selection.start == selection.end;
1456 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1457 let selection_end = snapshot.next_line_boundary(selection.end).1;
1458 for row in cmp::max(selection_start.row(), start_row)
1459 ..=cmp::min(selection_end.row(), end_row)
1460 {
1461 let contains_non_empty_selection =
1462 active_rows.entry(row).or_insert(!is_empty);
1463 *contains_non_empty_selection |= !is_empty;
1464 }
1465 }
1466
1467 // Render the local selections in the leader's color when following.
1468 let local_replica_id = view
1469 .leader_replica_id
1470 .unwrap_or_else(|| view.replica_id(cx));
1471
1472 selections.push((
1473 local_replica_id,
1474 local_selections
1475 .into_iter()
1476 .map(|selection| {
1477 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1478 })
1479 .collect(),
1480 ));
1481 }
1482 });
1483
1484 let line_number_layouts =
1485 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1486
1487 let diff_hunks = snapshot
1488 .buffer_snapshot
1489 .git_diff_hunks_in_range(start_row..end_row)
1490 .collect();
1491
1492 let mut max_visible_line_width = 0.0;
1493 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1494 for line in &line_layouts {
1495 if line.width() > max_visible_line_width {
1496 max_visible_line_width = line.width();
1497 }
1498 }
1499
1500 let style = self.style.clone();
1501 let longest_line_width = layout_line(
1502 snapshot.longest_row(),
1503 &snapshot,
1504 &style,
1505 cx.text_layout_cache,
1506 )
1507 .width();
1508 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1509 let em_width = style.text.em_width(cx.font_cache);
1510 let (scroll_width, blocks) = self.layout_blocks(
1511 start_row..end_row,
1512 &snapshot,
1513 size.x(),
1514 scroll_width,
1515 gutter_padding,
1516 gutter_width,
1517 em_width,
1518 gutter_width + gutter_margin,
1519 line_height,
1520 &style,
1521 &line_layouts,
1522 cx,
1523 );
1524
1525 let max_row = snapshot.max_point().row();
1526 let scroll_max = vec2f(
1527 ((scroll_width - text_size.x()) / em_width).max(0.0),
1528 max_row.saturating_sub(1) as f32,
1529 );
1530
1531 self.update_view(cx.app, |view, cx| {
1532 let clamped = view.clamp_scroll_left(scroll_max.x());
1533
1534 let autoscrolled = if autoscroll_horizontally {
1535 view.autoscroll_horizontally(
1536 start_row,
1537 text_size.x(),
1538 scroll_width,
1539 em_width,
1540 &line_layouts,
1541 cx,
1542 )
1543 } else {
1544 false
1545 };
1546
1547 if clamped || autoscrolled {
1548 snapshot = view.snapshot(cx);
1549 }
1550 });
1551
1552 let mut context_menu = None;
1553 let mut code_actions_indicator = None;
1554 let mut hover = None;
1555 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1556 let newest_selection_head = view
1557 .selections
1558 .newest::<usize>(cx)
1559 .head()
1560 .to_display_point(&snapshot);
1561
1562 let style = view.style(cx);
1563 if (start_row..end_row).contains(&newest_selection_head.row()) {
1564 if view.context_menu_visible() {
1565 context_menu =
1566 view.render_context_menu(newest_selection_head, style.clone(), cx);
1567 }
1568
1569 code_actions_indicator = view
1570 .render_code_actions_indicator(&style, cx)
1571 .map(|indicator| (newest_selection_head.row(), indicator));
1572 }
1573
1574 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1575 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1576 });
1577
1578 if let Some((_, context_menu)) = context_menu.as_mut() {
1579 context_menu.layout(
1580 SizeConstraint {
1581 min: Vector2F::zero(),
1582 max: vec2f(
1583 cx.window_size.x() * 0.7,
1584 (12. * line_height).min((size.y() - line_height) / 2.),
1585 ),
1586 },
1587 cx,
1588 );
1589 }
1590
1591 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1592 indicator.layout(
1593 SizeConstraint::strict_along(
1594 Axis::Vertical,
1595 line_height * style.code_actions.vertical_scale,
1596 ),
1597 cx,
1598 );
1599 }
1600
1601 if let Some((_, hover_popovers)) = hover.as_mut() {
1602 for hover_popover in hover_popovers.iter_mut() {
1603 hover_popover.layout(
1604 SizeConstraint {
1605 min: Vector2F::zero(),
1606 max: vec2f(
1607 (120. * em_width) // Default size
1608 .min(size.x() / 2.) // Shrink to half of the editor width
1609 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1610 (16. * line_height) // Default size
1611 .min(size.y() / 2.) // Shrink to half of the editor height
1612 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1613 ),
1614 },
1615 cx,
1616 );
1617 }
1618 }
1619
1620 (
1621 size,
1622 LayoutState {
1623 position_map: Arc::new(PositionMap {
1624 size,
1625 scroll_max,
1626 line_layouts,
1627 line_height,
1628 em_width,
1629 em_advance,
1630 snapshot,
1631 }),
1632 gutter_size,
1633 gutter_padding,
1634 text_size,
1635 gutter_margin,
1636 active_rows,
1637 highlighted_rows,
1638 highlighted_ranges,
1639 line_number_layouts,
1640 diff_hunks,
1641 blocks,
1642 selections,
1643 context_menu,
1644 code_actions_indicator,
1645 hover_popovers: hover,
1646 },
1647 )
1648 }
1649
1650 fn paint(
1651 &mut self,
1652 bounds: RectF,
1653 visible_bounds: RectF,
1654 layout: &mut Self::LayoutState,
1655 cx: &mut PaintContext,
1656 ) -> Self::PaintState {
1657 cx.scene.push_layer(Some(bounds));
1658
1659 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1660 let text_bounds = RectF::new(
1661 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1662 layout.text_size,
1663 );
1664
1665 Self::attach_mouse_handlers(
1666 &self.view,
1667 &layout.position_map,
1668 visible_bounds,
1669 text_bounds,
1670 gutter_bounds,
1671 bounds,
1672 cx,
1673 );
1674
1675 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1676 if layout.gutter_size.x() > 0. {
1677 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1678 }
1679 self.paint_text(text_bounds, visible_bounds, layout, cx);
1680
1681 if !layout.blocks.is_empty() {
1682 cx.scene.push_layer(Some(bounds));
1683 self.paint_blocks(bounds, visible_bounds, layout, cx);
1684 cx.scene.pop_layer();
1685 }
1686
1687 cx.scene.pop_layer();
1688 }
1689
1690 fn dispatch_event(
1691 &mut self,
1692 event: &Event,
1693 _: RectF,
1694 _: RectF,
1695 _: &mut LayoutState,
1696 _: &mut (),
1697 cx: &mut EventContext,
1698 ) -> bool {
1699 if let Event::ModifiersChanged(event) = event {
1700 self.modifiers_changed(*event, cx);
1701 }
1702
1703 false
1704 }
1705
1706 fn rect_for_text_range(
1707 &self,
1708 range_utf16: Range<usize>,
1709 bounds: RectF,
1710 _: RectF,
1711 layout: &Self::LayoutState,
1712 _: &Self::PaintState,
1713 _: &gpui::MeasurementContext,
1714 ) -> Option<RectF> {
1715 let text_bounds = RectF::new(
1716 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1717 layout.text_size,
1718 );
1719 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1720 let scroll_position = layout.position_map.snapshot.scroll_position();
1721 let start_row = scroll_position.y() as u32;
1722 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1723 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1724
1725 let range_start = OffsetUtf16(range_utf16.start)
1726 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1727 if range_start.row() < start_row {
1728 return None;
1729 }
1730
1731 let line = layout
1732 .position_map
1733 .line_layouts
1734 .get((range_start.row() - start_row) as usize)?;
1735 let range_start_x = line.x_for_index(range_start.column() as usize);
1736 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1737 Some(RectF::new(
1738 content_origin
1739 + vec2f(
1740 range_start_x,
1741 range_start_y + layout.position_map.line_height,
1742 )
1743 - vec2f(scroll_left, scroll_top),
1744 vec2f(
1745 layout.position_map.em_width,
1746 layout.position_map.line_height,
1747 ),
1748 ))
1749 }
1750
1751 fn debug(
1752 &self,
1753 bounds: RectF,
1754 _: &Self::LayoutState,
1755 _: &Self::PaintState,
1756 _: &gpui::DebugContext,
1757 ) -> json::Value {
1758 json!({
1759 "type": "BufferElement",
1760 "bounds": bounds.to_json()
1761 })
1762 }
1763}
1764
1765pub struct LayoutState {
1766 position_map: Arc<PositionMap>,
1767 gutter_size: Vector2F,
1768 gutter_padding: f32,
1769 gutter_margin: f32,
1770 text_size: Vector2F,
1771 active_rows: BTreeMap<u32, bool>,
1772 highlighted_rows: Option<Range<u32>>,
1773 line_number_layouts: Vec<Option<text_layout::Line>>,
1774 blocks: Vec<BlockLayout>,
1775 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1776 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1777 context_menu: Option<(DisplayPoint, ElementBox)>,
1778 diff_hunks: Vec<DiffHunk<u32>>,
1779 code_actions_indicator: Option<(u32, ElementBox)>,
1780 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
1781}
1782
1783pub struct PositionMap {
1784 size: Vector2F,
1785 line_height: f32,
1786 scroll_max: Vector2F,
1787 em_width: f32,
1788 em_advance: f32,
1789 line_layouts: Vec<text_layout::Line>,
1790 snapshot: EditorSnapshot,
1791}
1792
1793impl PositionMap {
1794 /// Returns two display points:
1795 /// 1. The nearest *valid* position in the editor
1796 /// 2. An unclipped, potentially *invalid* position that maps directly to
1797 /// the given pixel position.
1798 fn point_for_position(
1799 &self,
1800 text_bounds: RectF,
1801 position: Vector2F,
1802 ) -> (DisplayPoint, DisplayPoint) {
1803 let scroll_position = self.snapshot.scroll_position();
1804 let position = position - text_bounds.origin();
1805 let y = position.y().max(0.0).min(self.size.y());
1806 let x = position.x() + (scroll_position.x() * self.em_width);
1807 let row = (y / self.line_height + scroll_position.y()) as u32;
1808 let (column, x_overshoot) = if let Some(line) = self
1809 .line_layouts
1810 .get(row as usize - scroll_position.y() as usize)
1811 {
1812 if let Some(ix) = line.index_for_x(x) {
1813 (ix as u32, 0.0)
1814 } else {
1815 (line.len() as u32, 0f32.max(x - line.width()))
1816 }
1817 } else {
1818 (0, x)
1819 };
1820
1821 let mut target_point = DisplayPoint::new(row, column);
1822 let point = self.snapshot.clip_point(target_point, Bias::Left);
1823 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
1824
1825 (point, target_point)
1826 }
1827}
1828
1829struct BlockLayout {
1830 row: u32,
1831 element: ElementBox,
1832 style: BlockStyle,
1833}
1834
1835fn layout_line(
1836 row: u32,
1837 snapshot: &EditorSnapshot,
1838 style: &EditorStyle,
1839 layout_cache: &TextLayoutCache,
1840) -> text_layout::Line {
1841 let mut line = snapshot.line(row);
1842
1843 if line.len() > MAX_LINE_LEN {
1844 let mut len = MAX_LINE_LEN;
1845 while !line.is_char_boundary(len) {
1846 len -= 1;
1847 }
1848
1849 line.truncate(len);
1850 }
1851
1852 layout_cache.layout_str(
1853 &line,
1854 style.text.font_size,
1855 &[(
1856 snapshot.line_len(row) as usize,
1857 RunStyle {
1858 font_id: style.text.font_id,
1859 color: Color::black(),
1860 underline: Default::default(),
1861 },
1862 )],
1863 )
1864}
1865
1866#[derive(Copy, Clone, PartialEq, Eq, Debug)]
1867pub enum CursorShape {
1868 Bar,
1869 Block,
1870 Underscore,
1871 Hollow,
1872}
1873
1874impl Default for CursorShape {
1875 fn default() -> Self {
1876 CursorShape::Bar
1877 }
1878}
1879
1880#[derive(Debug)]
1881pub struct Cursor {
1882 origin: Vector2F,
1883 block_width: f32,
1884 line_height: f32,
1885 color: Color,
1886 shape: CursorShape,
1887 block_text: Option<Line>,
1888}
1889
1890impl Cursor {
1891 pub fn new(
1892 origin: Vector2F,
1893 block_width: f32,
1894 line_height: f32,
1895 color: Color,
1896 shape: CursorShape,
1897 block_text: Option<Line>,
1898 ) -> Cursor {
1899 Cursor {
1900 origin,
1901 block_width,
1902 line_height,
1903 color,
1904 shape,
1905 block_text,
1906 }
1907 }
1908
1909 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
1910 RectF::new(
1911 self.origin + origin,
1912 vec2f(self.block_width, self.line_height),
1913 )
1914 }
1915
1916 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
1917 let bounds = match self.shape {
1918 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
1919 CursorShape::Block | CursorShape::Hollow => RectF::new(
1920 self.origin + origin,
1921 vec2f(self.block_width, self.line_height),
1922 ),
1923 CursorShape::Underscore => RectF::new(
1924 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
1925 vec2f(self.block_width, 2.0),
1926 ),
1927 };
1928
1929 //Draw background or border quad
1930 if matches!(self.shape, CursorShape::Hollow) {
1931 cx.scene.push_quad(Quad {
1932 bounds,
1933 background: None,
1934 border: Border::all(1., self.color),
1935 corner_radius: 0.,
1936 });
1937 } else {
1938 cx.scene.push_quad(Quad {
1939 bounds,
1940 background: Some(self.color),
1941 border: Default::default(),
1942 corner_radius: 0.,
1943 });
1944 }
1945
1946 if let Some(block_text) = &self.block_text {
1947 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
1948 }
1949 }
1950
1951 pub fn shape(&self) -> CursorShape {
1952 self.shape
1953 }
1954}
1955
1956#[derive(Debug)]
1957pub struct HighlightedRange {
1958 pub start_y: f32,
1959 pub line_height: f32,
1960 pub lines: Vec<HighlightedRangeLine>,
1961 pub color: Color,
1962 pub corner_radius: f32,
1963}
1964
1965#[derive(Debug)]
1966pub struct HighlightedRangeLine {
1967 pub start_x: f32,
1968 pub end_x: f32,
1969}
1970
1971impl HighlightedRange {
1972 pub fn paint(&self, bounds: RectF, scene: &mut Scene) {
1973 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
1974 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
1975 self.paint_lines(
1976 self.start_y + self.line_height,
1977 &self.lines[1..],
1978 bounds,
1979 scene,
1980 );
1981 } else {
1982 self.paint_lines(self.start_y, &self.lines, bounds, scene);
1983 }
1984 }
1985
1986 fn paint_lines(
1987 &self,
1988 start_y: f32,
1989 lines: &[HighlightedRangeLine],
1990 bounds: RectF,
1991 scene: &mut Scene,
1992 ) {
1993 if lines.is_empty() {
1994 return;
1995 }
1996
1997 let mut path = PathBuilder::new();
1998 let first_line = lines.first().unwrap();
1999 let last_line = lines.last().unwrap();
2000
2001 let first_top_left = vec2f(first_line.start_x, start_y);
2002 let first_top_right = vec2f(first_line.end_x, start_y);
2003
2004 let curve_height = vec2f(0., self.corner_radius);
2005 let curve_width = |start_x: f32, end_x: f32| {
2006 let max = (end_x - start_x) / 2.;
2007 let width = if max < self.corner_radius {
2008 max
2009 } else {
2010 self.corner_radius
2011 };
2012
2013 vec2f(width, 0.)
2014 };
2015
2016 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2017 path.reset(first_top_right - top_curve_width);
2018 path.curve_to(first_top_right + curve_height, first_top_right);
2019
2020 let mut iter = lines.iter().enumerate().peekable();
2021 while let Some((ix, line)) = iter.next() {
2022 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2023
2024 if let Some((_, next_line)) = iter.peek() {
2025 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2026
2027 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2028 Ordering::Equal => {
2029 path.line_to(bottom_right);
2030 }
2031 Ordering::Less => {
2032 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2033 path.line_to(bottom_right - curve_height);
2034 if self.corner_radius > 0. {
2035 path.curve_to(bottom_right - curve_width, bottom_right);
2036 }
2037 path.line_to(next_top_right + curve_width);
2038 if self.corner_radius > 0. {
2039 path.curve_to(next_top_right + curve_height, next_top_right);
2040 }
2041 }
2042 Ordering::Greater => {
2043 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2044 path.line_to(bottom_right - curve_height);
2045 if self.corner_radius > 0. {
2046 path.curve_to(bottom_right + curve_width, bottom_right);
2047 }
2048 path.line_to(next_top_right - curve_width);
2049 if self.corner_radius > 0. {
2050 path.curve_to(next_top_right + curve_height, next_top_right);
2051 }
2052 }
2053 }
2054 } else {
2055 let curve_width = curve_width(line.start_x, line.end_x);
2056 path.line_to(bottom_right - curve_height);
2057 if self.corner_radius > 0. {
2058 path.curve_to(bottom_right - curve_width, bottom_right);
2059 }
2060
2061 let bottom_left = vec2f(line.start_x, bottom_right.y());
2062 path.line_to(bottom_left + curve_width);
2063 if self.corner_radius > 0. {
2064 path.curve_to(bottom_left - curve_height, bottom_left);
2065 }
2066 }
2067 }
2068
2069 if first_line.start_x > last_line.start_x {
2070 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2071 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2072 path.line_to(second_top_left + curve_height);
2073 if self.corner_radius > 0. {
2074 path.curve_to(second_top_left + curve_width, second_top_left);
2075 }
2076 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2077 path.line_to(first_bottom_left - curve_width);
2078 if self.corner_radius > 0. {
2079 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2080 }
2081 }
2082
2083 path.line_to(first_top_left + curve_height);
2084 if self.corner_radius > 0. {
2085 path.curve_to(first_top_left + top_curve_width, first_top_left);
2086 }
2087 path.line_to(first_top_right - top_curve_width);
2088
2089 scene.push_path(path.build(self.color, Some(bounds)));
2090 }
2091}
2092
2093pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2094 delta.powf(1.5) / 100.0
2095}
2096
2097fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2098 delta.powf(1.2) / 300.0
2099}
2100
2101#[cfg(test)]
2102mod tests {
2103 use std::sync::Arc;
2104
2105 use super::*;
2106 use crate::{
2107 display_map::{BlockDisposition, BlockProperties},
2108 Editor, MultiBuffer,
2109 };
2110 use settings::Settings;
2111 use util::test::sample_text;
2112
2113 #[gpui::test]
2114 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2115 cx.set_global(Settings::test(cx));
2116 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2117 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2118 Editor::new(EditorMode::Full, buffer, None, None, cx)
2119 });
2120 let element = EditorElement::new(
2121 editor.downgrade(),
2122 editor.read(cx).style(cx),
2123 CursorShape::Bar,
2124 );
2125
2126 let layouts = editor.update(cx, |editor, cx| {
2127 let snapshot = editor.snapshot(cx);
2128 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2129 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2130 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &layout_cx)
2131 });
2132 assert_eq!(layouts.len(), 6);
2133 }
2134
2135 #[gpui::test]
2136 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2137 cx.set_global(Settings::test(cx));
2138 let buffer = MultiBuffer::build_simple("", cx);
2139 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2140 Editor::new(EditorMode::Full, buffer, None, None, cx)
2141 });
2142
2143 editor.update(cx, |editor, cx| {
2144 editor.set_placeholder_text("hello", cx);
2145 editor.insert_blocks(
2146 [BlockProperties {
2147 style: BlockStyle::Fixed,
2148 disposition: BlockDisposition::Above,
2149 height: 3,
2150 position: Anchor::min(),
2151 render: Arc::new(|_| Empty::new().boxed()),
2152 }],
2153 cx,
2154 );
2155
2156 // Blur the editor so that it displays placeholder text.
2157 cx.blur();
2158 });
2159
2160 let mut element = EditorElement::new(
2161 editor.downgrade(),
2162 editor.read(cx).style(cx),
2163 CursorShape::Bar,
2164 );
2165
2166 let mut scene = Scene::new(1.0);
2167 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2168 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2169 let (size, mut state) = element.layout(
2170 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2171 &mut layout_cx,
2172 );
2173
2174 assert_eq!(state.position_map.line_layouts.len(), 4);
2175 assert_eq!(
2176 state
2177 .line_number_layouts
2178 .iter()
2179 .map(Option::is_some)
2180 .collect::<Vec<_>>(),
2181 &[false, false, false, true]
2182 );
2183
2184 // Don't panic.
2185 let bounds = RectF::new(Default::default(), size);
2186 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2187 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2188 }
2189}