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};
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 (
549 inserted_color,
550 modified_color,
551 deleted_color,
552 width_multiplier,
553 corner_radius,
554 removed_width_mult,
555 ) = {
556 let editor = &cx.global::<Settings>().theme.editor;
557 (
558 editor.diff_background_inserted,
559 editor.diff_background_modified,
560 editor.diff_background_deleted,
561 editor.diff_indicator_width_multiplier,
562 editor.diff_indicator_corner_radius,
563 editor.removed_diff_width_multiplier,
564 )
565 };
566
567 for hunk in &layout.diff_hunks {
568 let color = match hunk.status() {
569 DiffHunkStatus::Added => inserted_color,
570 DiffHunkStatus::Modified => modified_color,
571
572 //TODO: This rendering is entirely a horrible hack
573 DiffHunkStatus::Removed => {
574 let row = hunk.buffer_range.start;
575
576 let offset = line_height / 2.;
577 let start_y = row as f32 * line_height + offset - scroll_top;
578 let end_y = start_y + line_height;
579
580 let width = removed_width_mult * line_height;
581 let highlight_origin = 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 cx.scene.push_quad(Quad {
586 bounds: highlight_bounds,
587 background: Some(deleted_color),
588 border: Border::new(0., Color::transparent_black()),
589 corner_radius: 1. * line_height,
590 });
591
592 continue;
593 }
594 };
595
596 let start_row = hunk.buffer_range.start;
597 let end_row = hunk.buffer_range.end;
598
599 let start_y = start_row as f32 * line_height - scroll_top;
600 let end_y = end_row as f32 * line_height - scroll_top;
601
602 let width = width_multiplier * line_height;
603 let highlight_origin = bounds.origin() + vec2f(-width, start_y);
604 let highlight_size = vec2f(width * 2., end_y - start_y);
605 let highlight_bounds = RectF::new(highlight_origin, highlight_size);
606
607 cx.scene.push_quad(Quad {
608 bounds: highlight_bounds,
609 background: Some(color),
610 border: Border::new(0., Color::transparent_black()),
611 corner_radius: corner_radius * line_height,
612 });
613 }
614
615 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
616 let mut x = bounds.width() - layout.gutter_padding;
617 let mut y = *row as f32 * line_height - scroll_top;
618 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
619 y += (line_height - indicator.size().y()) / 2.;
620 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
621 }
622 }
623
624 fn paint_text(
625 &mut self,
626 bounds: RectF,
627 visible_bounds: RectF,
628 layout: &mut LayoutState,
629 cx: &mut PaintContext,
630 ) {
631 let view = self.view(cx.app);
632 let style = &self.style;
633 let local_replica_id = view.replica_id(cx);
634 let scroll_position = layout.position_map.snapshot.scroll_position();
635 let start_row = scroll_position.y() as u32;
636 let scroll_top = scroll_position.y() * layout.position_map.line_height;
637 let end_row =
638 ((scroll_top + bounds.height()) / layout.position_map.line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
639 let max_glyph_width = layout.position_map.em_width;
640 let scroll_left = scroll_position.x() * max_glyph_width;
641 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
642
643 cx.scene.push_layer(Some(bounds));
644
645 cx.scene.push_cursor_region(CursorRegion {
646 bounds,
647 style: if !view.link_go_to_definition_state.definitions.is_empty() {
648 CursorStyle::PointingHand
649 } else {
650 CursorStyle::IBeam
651 },
652 });
653
654 for (range, color) in &layout.highlighted_ranges {
655 self.paint_highlighted_range(
656 range.clone(),
657 start_row,
658 end_row,
659 *color,
660 0.,
661 0.15 * layout.position_map.line_height,
662 layout,
663 content_origin,
664 scroll_top,
665 scroll_left,
666 bounds,
667 cx,
668 );
669 }
670
671 let mut cursors = SmallVec::<[Cursor; 32]>::new();
672 for (replica_id, selections) in &layout.selections {
673 let selection_style = style.replica_selection_style(*replica_id);
674 let corner_radius = 0.15 * layout.position_map.line_height;
675
676 for selection in selections {
677 self.paint_highlighted_range(
678 selection.range.clone(),
679 start_row,
680 end_row,
681 selection_style.selection,
682 corner_radius,
683 corner_radius * 2.,
684 layout,
685 content_origin,
686 scroll_top,
687 scroll_left,
688 bounds,
689 cx,
690 );
691
692 if view.show_local_cursors() || *replica_id != local_replica_id {
693 let cursor_position = selection.head;
694 if (start_row..end_row).contains(&cursor_position.row()) {
695 let cursor_row_layout = &layout.position_map.line_layouts
696 [(cursor_position.row() - start_row) as usize];
697 let cursor_column = cursor_position.column() as usize;
698
699 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
700 let mut block_width =
701 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
702 if block_width == 0.0 {
703 block_width = layout.position_map.em_width;
704 }
705 let block_text = if let CursorShape::Block = self.cursor_shape {
706 layout
707 .position_map
708 .snapshot
709 .chars_at(cursor_position)
710 .next()
711 .and_then(|character| {
712 let font_id =
713 cursor_row_layout.font_for_index(cursor_column)?;
714 let text = character.to_string();
715
716 Some(cx.text_layout_cache.layout_str(
717 &text,
718 cursor_row_layout.font_size(),
719 &[(
720 text.len(),
721 RunStyle {
722 font_id,
723 color: style.background,
724 underline: Default::default(),
725 },
726 )],
727 ))
728 })
729 } else {
730 None
731 };
732
733 let x = cursor_character_x - scroll_left;
734 let y = cursor_position.row() as f32 * layout.position_map.line_height
735 - scroll_top;
736 cursors.push(Cursor {
737 color: selection_style.cursor,
738 block_width,
739 origin: vec2f(x, y),
740 line_height: layout.position_map.line_height,
741 shape: self.cursor_shape,
742 block_text,
743 });
744 }
745 }
746 }
747 }
748
749 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
750 // Draw glyphs
751 for (ix, line) in layout.position_map.line_layouts.iter().enumerate() {
752 let row = start_row + ix as u32;
753 line.paint(
754 content_origin
755 + vec2f(
756 -scroll_left,
757 row as f32 * layout.position_map.line_height - scroll_top,
758 ),
759 visible_text_bounds,
760 layout.position_map.line_height,
761 cx,
762 );
763 }
764 }
765
766 cx.scene.push_layer(Some(bounds));
767 for cursor in cursors {
768 cursor.paint(content_origin, cx);
769 }
770 cx.scene.pop_layer();
771
772 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
773 cx.scene.push_stacking_context(None);
774 let cursor_row_layout =
775 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
776 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
777 let y = (position.row() + 1) as f32 * layout.position_map.line_height - scroll_top;
778 let mut list_origin = content_origin + vec2f(x, y);
779 let list_width = context_menu.size().x();
780 let list_height = context_menu.size().y();
781
782 // Snap the right edge of the list to the right edge of the window if
783 // its horizontal bounds overflow.
784 if list_origin.x() + list_width > cx.window_size.x() {
785 list_origin.set_x((cx.window_size.x() - list_width).max(0.));
786 }
787
788 if list_origin.y() + list_height > bounds.max_y() {
789 list_origin.set_y(list_origin.y() - layout.position_map.line_height - list_height);
790 }
791
792 context_menu.paint(
793 list_origin,
794 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
795 cx,
796 );
797
798 cx.scene.pop_stacking_context();
799 }
800
801 if let Some((position, hover_popovers)) = layout.hover_popovers.as_mut() {
802 cx.scene.push_stacking_context(None);
803
804 // This is safe because we check on layout whether the required row is available
805 let hovered_row_layout =
806 &layout.position_map.line_layouts[(position.row() - start_row) as usize];
807
808 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
809 // height. This is the size we will use to decide whether to render popovers above or below
810 // the hovered line.
811 let first_size = hover_popovers[0].size();
812 let height_to_reserve = first_size.y()
813 + 1.5 * MIN_POPOVER_LINE_HEIGHT as f32 * layout.position_map.line_height;
814
815 // Compute Hovered Point
816 let x = hovered_row_layout.x_for_index(position.column() as usize) - scroll_left;
817 let y = position.row() as f32 * layout.position_map.line_height - scroll_top;
818 let hovered_point = content_origin + vec2f(x, y);
819
820 if hovered_point.y() - height_to_reserve > 0.0 {
821 // There is enough space above. Render popovers above the hovered point
822 let mut current_y = hovered_point.y();
823 for hover_popover in hover_popovers {
824 let size = hover_popover.size();
825 let mut popover_origin = vec2f(hovered_point.x(), current_y - size.y());
826
827 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
828 if x_out_of_bounds < 0.0 {
829 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
830 }
831
832 hover_popover.paint(
833 popover_origin,
834 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
835 cx,
836 );
837
838 current_y = popover_origin.y() - HOVER_POPOVER_GAP;
839 }
840 } else {
841 // There is not enough space above. Render popovers below the hovered point
842 let mut current_y = hovered_point.y() + layout.position_map.line_height;
843 for hover_popover in hover_popovers {
844 let size = hover_popover.size();
845 let mut popover_origin = vec2f(hovered_point.x(), current_y);
846
847 let x_out_of_bounds = bounds.max_x() - (popover_origin.x() + size.x());
848 if x_out_of_bounds < 0.0 {
849 popover_origin.set_x(popover_origin.x() + x_out_of_bounds);
850 }
851
852 hover_popover.paint(
853 popover_origin,
854 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
855 cx,
856 );
857
858 current_y = popover_origin.y() + size.y() + HOVER_POPOVER_GAP;
859 }
860 }
861
862 cx.scene.pop_stacking_context();
863 }
864
865 cx.scene.pop_layer();
866 }
867
868 #[allow(clippy::too_many_arguments)]
869 fn paint_highlighted_range(
870 &self,
871 range: Range<DisplayPoint>,
872 start_row: u32,
873 end_row: u32,
874 color: Color,
875 corner_radius: f32,
876 line_end_overshoot: f32,
877 layout: &LayoutState,
878 content_origin: Vector2F,
879 scroll_top: f32,
880 scroll_left: f32,
881 bounds: RectF,
882 cx: &mut PaintContext,
883 ) {
884 if range.start != range.end {
885 let row_range = if range.end.column() == 0 {
886 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
887 } else {
888 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
889 };
890
891 let highlighted_range = HighlightedRange {
892 color,
893 line_height: layout.position_map.line_height,
894 corner_radius,
895 start_y: content_origin.y()
896 + row_range.start as f32 * layout.position_map.line_height
897 - scroll_top,
898 lines: row_range
899 .into_iter()
900 .map(|row| {
901 let line_layout =
902 &layout.position_map.line_layouts[(row - start_row) as usize];
903 HighlightedRangeLine {
904 start_x: if row == range.start.row() {
905 content_origin.x()
906 + line_layout.x_for_index(range.start.column() as usize)
907 - scroll_left
908 } else {
909 content_origin.x() - scroll_left
910 },
911 end_x: if row == range.end.row() {
912 content_origin.x()
913 + line_layout.x_for_index(range.end.column() as usize)
914 - scroll_left
915 } else {
916 content_origin.x() + line_layout.width() + line_end_overshoot
917 - scroll_left
918 },
919 }
920 })
921 .collect(),
922 };
923
924 highlighted_range.paint(bounds, cx.scene);
925 }
926 }
927
928 fn paint_blocks(
929 &mut self,
930 bounds: RectF,
931 visible_bounds: RectF,
932 layout: &mut LayoutState,
933 cx: &mut PaintContext,
934 ) {
935 let scroll_position = layout.position_map.snapshot.scroll_position();
936 let scroll_left = scroll_position.x() * layout.position_map.em_width;
937 let scroll_top = scroll_position.y() * layout.position_map.line_height;
938
939 for block in &mut layout.blocks {
940 let mut origin = bounds.origin()
941 + vec2f(
942 0.,
943 block.row as f32 * layout.position_map.line_height - scroll_top,
944 );
945 if !matches!(block.style, BlockStyle::Sticky) {
946 origin += vec2f(-scroll_left, 0.);
947 }
948 block.element.paint(origin, visible_bounds, cx);
949 }
950 }
951
952 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
953 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
954 let style = &self.style;
955
956 cx.text_layout_cache
957 .layout_str(
958 "1".repeat(digit_count).as_str(),
959 style.text.font_size,
960 &[(
961 digit_count,
962 RunStyle {
963 font_id: style.text.font_id,
964 color: Color::black(),
965 underline: Default::default(),
966 },
967 )],
968 )
969 .width()
970 }
971
972 fn layout_line_numbers(
973 &self,
974 rows: Range<u32>,
975 active_rows: &BTreeMap<u32, bool>,
976 snapshot: &EditorSnapshot,
977 cx: &LayoutContext,
978 ) -> Vec<Option<text_layout::Line>> {
979 let style = &self.style;
980 let include_line_numbers = snapshot.mode == EditorMode::Full;
981 let mut line_number_layouts = Vec::with_capacity(rows.len());
982 let mut line_number = String::new();
983 for (ix, row) in snapshot
984 .buffer_rows(rows.start)
985 .take((rows.end - rows.start) as usize)
986 .enumerate()
987 {
988 let display_row = rows.start + ix as u32;
989 let color = if active_rows.contains_key(&display_row) {
990 style.line_number_active
991 } else {
992 style.line_number
993 };
994 if let Some(buffer_row) = row {
995 if include_line_numbers {
996 line_number.clear();
997 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
998 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
999 &line_number,
1000 style.text.font_size,
1001 &[(
1002 line_number.len(),
1003 RunStyle {
1004 font_id: style.text.font_id,
1005 color,
1006 underline: Default::default(),
1007 },
1008 )],
1009 )));
1010 }
1011 } else {
1012 line_number_layouts.push(None);
1013 }
1014 }
1015
1016 line_number_layouts
1017 }
1018
1019 fn layout_lines(
1020 &mut self,
1021 rows: Range<u32>,
1022 snapshot: &EditorSnapshot,
1023 cx: &LayoutContext,
1024 ) -> Vec<text_layout::Line> {
1025 if rows.start >= rows.end {
1026 return Vec::new();
1027 }
1028
1029 // When the editor is empty and unfocused, then show the placeholder.
1030 if snapshot.is_empty() && !snapshot.is_focused() {
1031 let placeholder_style = self
1032 .style
1033 .placeholder_text
1034 .as_ref()
1035 .unwrap_or(&self.style.text);
1036 let placeholder_text = snapshot.placeholder_text();
1037 let placeholder_lines = placeholder_text
1038 .as_ref()
1039 .map_or("", AsRef::as_ref)
1040 .split('\n')
1041 .skip(rows.start as usize)
1042 .chain(iter::repeat(""))
1043 .take(rows.len());
1044 placeholder_lines
1045 .map(|line| {
1046 cx.text_layout_cache.layout_str(
1047 line,
1048 placeholder_style.font_size,
1049 &[(
1050 line.len(),
1051 RunStyle {
1052 font_id: placeholder_style.font_id,
1053 color: placeholder_style.color,
1054 underline: Default::default(),
1055 },
1056 )],
1057 )
1058 })
1059 .collect()
1060 } else {
1061 let style = &self.style;
1062 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
1063 let mut highlight_style = chunk
1064 .syntax_highlight_id
1065 .and_then(|id| id.style(&style.syntax));
1066
1067 if let Some(chunk_highlight) = chunk.highlight_style {
1068 if let Some(highlight_style) = highlight_style.as_mut() {
1069 highlight_style.highlight(chunk_highlight);
1070 } else {
1071 highlight_style = Some(chunk_highlight);
1072 }
1073 }
1074
1075 let mut diagnostic_highlight = HighlightStyle::default();
1076
1077 if chunk.is_unnecessary {
1078 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
1079 }
1080
1081 if let Some(severity) = chunk.diagnostic_severity {
1082 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
1083 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
1084 let diagnostic_style = super::diagnostic_style(severity, true, style);
1085 diagnostic_highlight.underline = Some(Underline {
1086 color: Some(diagnostic_style.message.text.color),
1087 thickness: 1.0.into(),
1088 squiggly: true,
1089 });
1090 }
1091 }
1092
1093 if let Some(highlight_style) = highlight_style.as_mut() {
1094 highlight_style.highlight(diagnostic_highlight);
1095 } else {
1096 highlight_style = Some(diagnostic_highlight);
1097 }
1098
1099 (chunk.text, highlight_style)
1100 });
1101 layout_highlighted_chunks(
1102 chunks,
1103 &style.text,
1104 cx.text_layout_cache,
1105 cx.font_cache,
1106 MAX_LINE_LEN,
1107 rows.len() as usize,
1108 )
1109 }
1110 }
1111
1112 #[allow(clippy::too_many_arguments)]
1113 fn layout_blocks(
1114 &mut self,
1115 rows: Range<u32>,
1116 snapshot: &EditorSnapshot,
1117 editor_width: f32,
1118 scroll_width: f32,
1119 gutter_padding: f32,
1120 gutter_width: f32,
1121 em_width: f32,
1122 text_x: f32,
1123 line_height: f32,
1124 style: &EditorStyle,
1125 line_layouts: &[text_layout::Line],
1126 cx: &mut LayoutContext,
1127 ) -> (f32, Vec<BlockLayout>) {
1128 let editor = if let Some(editor) = self.view.upgrade(cx) {
1129 editor
1130 } else {
1131 return Default::default();
1132 };
1133
1134 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
1135 let scroll_x = snapshot.scroll_position.x();
1136 let (fixed_blocks, non_fixed_blocks) = snapshot
1137 .blocks_in_range(rows.clone())
1138 .partition::<Vec<_>, _>(|(_, block)| match block {
1139 TransformBlock::ExcerptHeader { .. } => false,
1140 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
1141 });
1142 let mut render_block = |block: &TransformBlock, width: f32| {
1143 let mut element = match block {
1144 TransformBlock::Custom(block) => {
1145 let align_to = block
1146 .position()
1147 .to_point(&snapshot.buffer_snapshot)
1148 .to_display_point(snapshot);
1149 let anchor_x = text_x
1150 + if rows.contains(&align_to.row()) {
1151 line_layouts[(align_to.row() - rows.start) as usize]
1152 .x_for_index(align_to.column() as usize)
1153 } else {
1154 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
1155 .x_for_index(align_to.column() as usize)
1156 };
1157
1158 cx.render(&editor, |_, cx| {
1159 block.render(&mut BlockContext {
1160 cx,
1161 anchor_x,
1162 gutter_padding,
1163 line_height,
1164 scroll_x,
1165 gutter_width,
1166 em_width,
1167 })
1168 })
1169 }
1170 TransformBlock::ExcerptHeader {
1171 key,
1172 buffer,
1173 range,
1174 starts_new_buffer,
1175 ..
1176 } => {
1177 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
1178 let jump_position = range
1179 .primary
1180 .as_ref()
1181 .map_or(range.context.start, |primary| primary.start);
1182 let jump_action = crate::Jump {
1183 path: ProjectPath {
1184 worktree_id: file.worktree_id(cx),
1185 path: file.path.clone(),
1186 },
1187 position: language::ToPoint::to_point(&jump_position, buffer),
1188 anchor: jump_position,
1189 };
1190
1191 enum JumpIcon {}
1192 cx.render(&editor, |_, cx| {
1193 MouseEventHandler::<JumpIcon>::new(*key, cx, |state, _| {
1194 let style = style.jump_icon.style_for(state, false);
1195 Svg::new("icons/arrow_up_right_8.svg")
1196 .with_color(style.color)
1197 .constrained()
1198 .with_width(style.icon_width)
1199 .aligned()
1200 .contained()
1201 .with_style(style.container)
1202 .constrained()
1203 .with_width(style.button_width)
1204 .with_height(style.button_width)
1205 .boxed()
1206 })
1207 .with_cursor_style(CursorStyle::PointingHand)
1208 .on_click(MouseButton::Left, move |_, cx| {
1209 cx.dispatch_action(jump_action.clone())
1210 })
1211 .with_tooltip::<JumpIcon, _>(
1212 *key,
1213 "Jump to Buffer".to_string(),
1214 Some(Box::new(crate::OpenExcerpts)),
1215 tooltip_style.clone(),
1216 cx,
1217 )
1218 .aligned()
1219 .flex_float()
1220 .boxed()
1221 })
1222 });
1223
1224 if *starts_new_buffer {
1225 let style = &self.style.diagnostic_path_header;
1226 let font_size =
1227 (style.text_scale_factor * self.style.text.font_size).round();
1228
1229 let mut filename = None;
1230 let mut parent_path = None;
1231 if let Some(file) = buffer.file() {
1232 let path = file.path();
1233 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
1234 parent_path =
1235 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
1236 }
1237
1238 Flex::row()
1239 .with_child(
1240 Label::new(
1241 filename.unwrap_or_else(|| "untitled".to_string()),
1242 style.filename.text.clone().with_font_size(font_size),
1243 )
1244 .contained()
1245 .with_style(style.filename.container)
1246 .aligned()
1247 .boxed(),
1248 )
1249 .with_children(parent_path.map(|path| {
1250 Label::new(path, style.path.text.clone().with_font_size(font_size))
1251 .contained()
1252 .with_style(style.path.container)
1253 .aligned()
1254 .boxed()
1255 }))
1256 .with_children(jump_icon)
1257 .contained()
1258 .with_style(style.container)
1259 .with_padding_left(gutter_padding)
1260 .with_padding_right(gutter_padding)
1261 .expanded()
1262 .named("path header block")
1263 } else {
1264 let text_style = self.style.text.clone();
1265 Flex::row()
1266 .with_child(Label::new("…".to_string(), text_style).boxed())
1267 .with_children(jump_icon)
1268 .contained()
1269 .with_padding_left(gutter_padding)
1270 .with_padding_right(gutter_padding)
1271 .expanded()
1272 .named("collapsed context")
1273 }
1274 }
1275 };
1276
1277 element.layout(
1278 SizeConstraint {
1279 min: Vector2F::zero(),
1280 max: vec2f(width, block.height() as f32 * line_height),
1281 },
1282 cx,
1283 );
1284 element
1285 };
1286
1287 let mut fixed_block_max_width = 0f32;
1288 let mut blocks = Vec::new();
1289 for (row, block) in fixed_blocks {
1290 let element = render_block(block, f32::INFINITY);
1291 fixed_block_max_width = fixed_block_max_width.max(element.size().x() + em_width);
1292 blocks.push(BlockLayout {
1293 row,
1294 element,
1295 style: BlockStyle::Fixed,
1296 });
1297 }
1298 for (row, block) in non_fixed_blocks {
1299 let style = match block {
1300 TransformBlock::Custom(block) => block.style(),
1301 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
1302 };
1303 let width = match style {
1304 BlockStyle::Sticky => editor_width,
1305 BlockStyle::Flex => editor_width
1306 .max(fixed_block_max_width)
1307 .max(gutter_width + scroll_width),
1308 BlockStyle::Fixed => unreachable!(),
1309 };
1310 let element = render_block(block, width);
1311 blocks.push(BlockLayout {
1312 row,
1313 element,
1314 style,
1315 });
1316 }
1317 (
1318 scroll_width.max(fixed_block_max_width - gutter_width),
1319 blocks,
1320 )
1321 }
1322}
1323
1324impl Element for EditorElement {
1325 type LayoutState = LayoutState;
1326 type PaintState = ();
1327
1328 fn layout(
1329 &mut self,
1330 constraint: SizeConstraint,
1331 cx: &mut LayoutContext,
1332 ) -> (Vector2F, Self::LayoutState) {
1333 let mut size = constraint.max;
1334 if size.x().is_infinite() {
1335 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
1336 }
1337
1338 let snapshot = self.snapshot(cx.app);
1339 let style = self.style.clone();
1340 let line_height = style.text.line_height(cx.font_cache);
1341
1342 let gutter_padding;
1343 let gutter_width;
1344 let gutter_margin;
1345 if snapshot.mode == EditorMode::Full {
1346 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
1347 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1348 gutter_margin = -style.text.descent(cx.font_cache);
1349 } else {
1350 gutter_padding = 0.0;
1351 gutter_width = 0.0;
1352 gutter_margin = 0.0;
1353 };
1354
1355 let text_width = size.x() - gutter_width;
1356 let em_width = style.text.em_width(cx.font_cache);
1357 let em_advance = style.text.em_advance(cx.font_cache);
1358 let overscroll = vec2f(em_width, 0.);
1359 let snapshot = self.update_view(cx.app, |view, cx| {
1360 let wrap_width = match view.soft_wrap_mode(cx) {
1361 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
1362 SoftWrap::EditorWidth => {
1363 Some(text_width - gutter_margin - overscroll.x() - em_width)
1364 }
1365 SoftWrap::Column(column) => Some(column as f32 * em_advance),
1366 };
1367
1368 if view.set_wrap_width(wrap_width, cx) {
1369 view.snapshot(cx)
1370 } else {
1371 snapshot
1372 }
1373 });
1374
1375 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
1376 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
1377 size.set_y(
1378 scroll_height
1379 .min(constraint.max_along(Axis::Vertical))
1380 .max(constraint.min_along(Axis::Vertical))
1381 .min(line_height * max_lines as f32),
1382 )
1383 } else if let EditorMode::SingleLine = snapshot.mode {
1384 size.set_y(
1385 line_height
1386 .min(constraint.max_along(Axis::Vertical))
1387 .max(constraint.min_along(Axis::Vertical)),
1388 )
1389 } else if size.y().is_infinite() {
1390 size.set_y(scroll_height);
1391 }
1392 let gutter_size = vec2f(gutter_width, size.y());
1393 let text_size = vec2f(text_width, size.y());
1394
1395 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
1396 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
1397 let snapshot = view.snapshot(cx);
1398 (autoscroll_horizontally, snapshot)
1399 });
1400
1401 let scroll_position = snapshot.scroll_position();
1402 // The scroll position is a fractional point, the whole number of which represents
1403 // the top of the window in terms of display rows.
1404 let start_row = scroll_position.y() as u32;
1405 let scroll_top = scroll_position.y() * line_height;
1406
1407 // Add 1 to ensure selections bleed off screen
1408 let end_row = 1 + cmp::min(
1409 ((scroll_top + size.y()) / line_height).ceil() as u32,
1410 snapshot.max_point().row(),
1411 );
1412
1413 let start_anchor = if start_row == 0 {
1414 Anchor::min()
1415 } else {
1416 snapshot
1417 .buffer_snapshot
1418 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1419 };
1420 let end_anchor = if end_row > snapshot.max_point().row() {
1421 Anchor::max()
1422 } else {
1423 snapshot
1424 .buffer_snapshot
1425 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1426 };
1427
1428 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1429 let mut active_rows = BTreeMap::new();
1430 let mut highlighted_rows = None;
1431 let mut highlighted_ranges = Vec::new();
1432 self.update_view(cx.app, |view, cx| {
1433 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1434
1435 highlighted_rows = view.highlighted_rows();
1436 let theme = cx.global::<Settings>().theme.as_ref();
1437 highlighted_ranges = view.background_highlights_in_range(
1438 start_anchor.clone()..end_anchor.clone(),
1439 &display_map,
1440 theme,
1441 );
1442
1443 let mut remote_selections = HashMap::default();
1444 for (replica_id, line_mode, selection) in display_map
1445 .buffer_snapshot
1446 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1447 {
1448 // The local selections match the leader's selections.
1449 if Some(replica_id) == view.leader_replica_id {
1450 continue;
1451 }
1452 remote_selections
1453 .entry(replica_id)
1454 .or_insert(Vec::new())
1455 .push(SelectionLayout::new(selection, line_mode, &display_map));
1456 }
1457 selections.extend(remote_selections);
1458
1459 if view.show_local_selections {
1460 let mut local_selections = view
1461 .selections
1462 .disjoint_in_range(start_anchor..end_anchor, cx);
1463 local_selections.extend(view.selections.pending(cx));
1464 for selection in &local_selections {
1465 let is_empty = selection.start == selection.end;
1466 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1467 let selection_end = snapshot.next_line_boundary(selection.end).1;
1468 for row in cmp::max(selection_start.row(), start_row)
1469 ..=cmp::min(selection_end.row(), end_row)
1470 {
1471 let contains_non_empty_selection =
1472 active_rows.entry(row).or_insert(!is_empty);
1473 *contains_non_empty_selection |= !is_empty;
1474 }
1475 }
1476
1477 // Render the local selections in the leader's color when following.
1478 let local_replica_id = view
1479 .leader_replica_id
1480 .unwrap_or_else(|| view.replica_id(cx));
1481
1482 selections.push((
1483 local_replica_id,
1484 local_selections
1485 .into_iter()
1486 .map(|selection| {
1487 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1488 })
1489 .collect(),
1490 ));
1491 }
1492 });
1493
1494 let line_number_layouts =
1495 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1496
1497 let diff_hunks = snapshot
1498 .buffer_snapshot
1499 .git_diff_hunks_in_range(start_row..end_row)
1500 .collect();
1501
1502 let mut max_visible_line_width = 0.0;
1503 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1504 for line in &line_layouts {
1505 if line.width() > max_visible_line_width {
1506 max_visible_line_width = line.width();
1507 }
1508 }
1509
1510 let style = self.style.clone();
1511 let longest_line_width = layout_line(
1512 snapshot.longest_row(),
1513 &snapshot,
1514 &style,
1515 cx.text_layout_cache,
1516 )
1517 .width();
1518 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1519 let em_width = style.text.em_width(cx.font_cache);
1520 let (scroll_width, blocks) = self.layout_blocks(
1521 start_row..end_row,
1522 &snapshot,
1523 size.x(),
1524 scroll_width,
1525 gutter_padding,
1526 gutter_width,
1527 em_width,
1528 gutter_width + gutter_margin,
1529 line_height,
1530 &style,
1531 &line_layouts,
1532 cx,
1533 );
1534
1535 let max_row = snapshot.max_point().row();
1536 let scroll_max = vec2f(
1537 ((scroll_width - text_size.x()) / em_width).max(0.0),
1538 max_row.saturating_sub(1) as f32,
1539 );
1540
1541 self.update_view(cx.app, |view, cx| {
1542 let clamped = view.clamp_scroll_left(scroll_max.x());
1543
1544 let autoscrolled = if autoscroll_horizontally {
1545 view.autoscroll_horizontally(
1546 start_row,
1547 text_size.x(),
1548 scroll_width,
1549 em_width,
1550 &line_layouts,
1551 cx,
1552 )
1553 } else {
1554 false
1555 };
1556
1557 if clamped || autoscrolled {
1558 snapshot = view.snapshot(cx);
1559 }
1560 });
1561
1562 let mut context_menu = None;
1563 let mut code_actions_indicator = None;
1564 let mut hover = None;
1565 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1566 let newest_selection_head = view
1567 .selections
1568 .newest::<usize>(cx)
1569 .head()
1570 .to_display_point(&snapshot);
1571
1572 let style = view.style(cx);
1573 if (start_row..end_row).contains(&newest_selection_head.row()) {
1574 if view.context_menu_visible() {
1575 context_menu =
1576 view.render_context_menu(newest_selection_head, style.clone(), cx);
1577 }
1578
1579 code_actions_indicator = view
1580 .render_code_actions_indicator(&style, cx)
1581 .map(|indicator| (newest_selection_head.row(), indicator));
1582 }
1583
1584 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1585 hover = view.hover_state.render(&snapshot, &style, visible_rows, cx);
1586 });
1587
1588 if let Some((_, context_menu)) = context_menu.as_mut() {
1589 context_menu.layout(
1590 SizeConstraint {
1591 min: Vector2F::zero(),
1592 max: vec2f(
1593 cx.window_size.x() * 0.7,
1594 (12. * line_height).min((size.y() - line_height) / 2.),
1595 ),
1596 },
1597 cx,
1598 );
1599 }
1600
1601 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1602 indicator.layout(
1603 SizeConstraint::strict_along(
1604 Axis::Vertical,
1605 line_height * style.code_actions.vertical_scale,
1606 ),
1607 cx,
1608 );
1609 }
1610
1611 if let Some((_, hover_popovers)) = hover.as_mut() {
1612 for hover_popover in hover_popovers.iter_mut() {
1613 hover_popover.layout(
1614 SizeConstraint {
1615 min: Vector2F::zero(),
1616 max: vec2f(
1617 (120. * em_width) // Default size
1618 .min(size.x() / 2.) // Shrink to half of the editor width
1619 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1620 (16. * line_height) // Default size
1621 .min(size.y() / 2.) // Shrink to half of the editor height
1622 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1623 ),
1624 },
1625 cx,
1626 );
1627 }
1628 }
1629
1630 (
1631 size,
1632 LayoutState {
1633 position_map: Arc::new(PositionMap {
1634 size,
1635 scroll_max,
1636 line_layouts,
1637 line_height,
1638 em_width,
1639 em_advance,
1640 snapshot,
1641 }),
1642 gutter_size,
1643 gutter_padding,
1644 text_size,
1645 gutter_margin,
1646 active_rows,
1647 highlighted_rows,
1648 highlighted_ranges,
1649 line_number_layouts,
1650 diff_hunks,
1651 blocks,
1652 selections,
1653 context_menu,
1654 code_actions_indicator,
1655 hover_popovers: hover,
1656 },
1657 )
1658 }
1659
1660 fn paint(
1661 &mut self,
1662 bounds: RectF,
1663 visible_bounds: RectF,
1664 layout: &mut Self::LayoutState,
1665 cx: &mut PaintContext,
1666 ) -> Self::PaintState {
1667 cx.scene.push_layer(Some(bounds));
1668
1669 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1670 let text_bounds = RectF::new(
1671 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1672 layout.text_size,
1673 );
1674
1675 Self::attach_mouse_handlers(
1676 &self.view,
1677 &layout.position_map,
1678 visible_bounds,
1679 text_bounds,
1680 gutter_bounds,
1681 bounds,
1682 cx,
1683 );
1684
1685 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1686 if layout.gutter_size.x() > 0. {
1687 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1688 }
1689 self.paint_text(text_bounds, visible_bounds, layout, cx);
1690
1691 if !layout.blocks.is_empty() {
1692 cx.scene.push_layer(Some(bounds));
1693 self.paint_blocks(bounds, visible_bounds, layout, cx);
1694 cx.scene.pop_layer();
1695 }
1696
1697 cx.scene.pop_layer();
1698 }
1699
1700 fn dispatch_event(
1701 &mut self,
1702 event: &Event,
1703 _: RectF,
1704 _: RectF,
1705 _: &mut LayoutState,
1706 _: &mut (),
1707 cx: &mut EventContext,
1708 ) -> bool {
1709 if let Event::ModifiersChanged(event) = event {
1710 self.modifiers_changed(*event, cx);
1711 }
1712
1713 false
1714 }
1715
1716 fn rect_for_text_range(
1717 &self,
1718 range_utf16: Range<usize>,
1719 bounds: RectF,
1720 _: RectF,
1721 layout: &Self::LayoutState,
1722 _: &Self::PaintState,
1723 _: &gpui::MeasurementContext,
1724 ) -> Option<RectF> {
1725 let text_bounds = RectF::new(
1726 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1727 layout.text_size,
1728 );
1729 let content_origin = text_bounds.origin() + vec2f(layout.gutter_margin, 0.);
1730 let scroll_position = layout.position_map.snapshot.scroll_position();
1731 let start_row = scroll_position.y() as u32;
1732 let scroll_top = scroll_position.y() * layout.position_map.line_height;
1733 let scroll_left = scroll_position.x() * layout.position_map.em_width;
1734
1735 let range_start = OffsetUtf16(range_utf16.start)
1736 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1737 if range_start.row() < start_row {
1738 return None;
1739 }
1740
1741 let line = layout
1742 .position_map
1743 .line_layouts
1744 .get((range_start.row() - start_row) as usize)?;
1745 let range_start_x = line.x_for_index(range_start.column() as usize);
1746 let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
1747 Some(RectF::new(
1748 content_origin
1749 + vec2f(
1750 range_start_x,
1751 range_start_y + layout.position_map.line_height,
1752 )
1753 - vec2f(scroll_left, scroll_top),
1754 vec2f(
1755 layout.position_map.em_width,
1756 layout.position_map.line_height,
1757 ),
1758 ))
1759 }
1760
1761 fn debug(
1762 &self,
1763 bounds: RectF,
1764 _: &Self::LayoutState,
1765 _: &Self::PaintState,
1766 _: &gpui::DebugContext,
1767 ) -> json::Value {
1768 json!({
1769 "type": "BufferElement",
1770 "bounds": bounds.to_json()
1771 })
1772 }
1773}
1774
1775pub struct LayoutState {
1776 position_map: Arc<PositionMap>,
1777 gutter_size: Vector2F,
1778 gutter_padding: f32,
1779 gutter_margin: f32,
1780 text_size: Vector2F,
1781 active_rows: BTreeMap<u32, bool>,
1782 highlighted_rows: Option<Range<u32>>,
1783 line_number_layouts: Vec<Option<text_layout::Line>>,
1784 blocks: Vec<BlockLayout>,
1785 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1786 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1787 context_menu: Option<(DisplayPoint, ElementBox)>,
1788 diff_hunks: Vec<DiffHunk<u32>>,
1789 code_actions_indicator: Option<(u32, ElementBox)>,
1790 hover_popovers: Option<(DisplayPoint, Vec<ElementBox>)>,
1791}
1792
1793pub struct PositionMap {
1794 size: Vector2F,
1795 line_height: f32,
1796 scroll_max: Vector2F,
1797 em_width: f32,
1798 em_advance: f32,
1799 line_layouts: Vec<text_layout::Line>,
1800 snapshot: EditorSnapshot,
1801}
1802
1803impl PositionMap {
1804 /// Returns two display points:
1805 /// 1. The nearest *valid* position in the editor
1806 /// 2. An unclipped, potentially *invalid* position that maps directly to
1807 /// the given pixel position.
1808 fn point_for_position(
1809 &self,
1810 text_bounds: RectF,
1811 position: Vector2F,
1812 ) -> (DisplayPoint, DisplayPoint) {
1813 let scroll_position = self.snapshot.scroll_position();
1814 let position = position - text_bounds.origin();
1815 let y = position.y().max(0.0).min(self.size.y());
1816 let x = position.x() + (scroll_position.x() * self.em_width);
1817 let row = (y / self.line_height + scroll_position.y()) as u32;
1818 let (column, x_overshoot) = if let Some(line) = self
1819 .line_layouts
1820 .get(row as usize - scroll_position.y() as usize)
1821 {
1822 if let Some(ix) = line.index_for_x(x) {
1823 (ix as u32, 0.0)
1824 } else {
1825 (line.len() as u32, 0f32.max(x - line.width()))
1826 }
1827 } else {
1828 (0, x)
1829 };
1830
1831 let mut target_point = DisplayPoint::new(row, column);
1832 let point = self.snapshot.clip_point(target_point, Bias::Left);
1833 *target_point.column_mut() += (x_overshoot / self.em_advance) as u32;
1834
1835 (point, target_point)
1836 }
1837}
1838
1839struct BlockLayout {
1840 row: u32,
1841 element: ElementBox,
1842 style: BlockStyle,
1843}
1844
1845fn layout_line(
1846 row: u32,
1847 snapshot: &EditorSnapshot,
1848 style: &EditorStyle,
1849 layout_cache: &TextLayoutCache,
1850) -> text_layout::Line {
1851 let mut line = snapshot.line(row);
1852
1853 if line.len() > MAX_LINE_LEN {
1854 let mut len = MAX_LINE_LEN;
1855 while !line.is_char_boundary(len) {
1856 len -= 1;
1857 }
1858
1859 line.truncate(len);
1860 }
1861
1862 layout_cache.layout_str(
1863 &line,
1864 style.text.font_size,
1865 &[(
1866 snapshot.line_len(row) as usize,
1867 RunStyle {
1868 font_id: style.text.font_id,
1869 color: Color::black(),
1870 underline: Default::default(),
1871 },
1872 )],
1873 )
1874}
1875
1876#[derive(Copy, Clone, PartialEq, Eq, Debug)]
1877pub enum CursorShape {
1878 Bar,
1879 Block,
1880 Underscore,
1881 Hollow,
1882}
1883
1884impl Default for CursorShape {
1885 fn default() -> Self {
1886 CursorShape::Bar
1887 }
1888}
1889
1890#[derive(Debug)]
1891pub struct Cursor {
1892 origin: Vector2F,
1893 block_width: f32,
1894 line_height: f32,
1895 color: Color,
1896 shape: CursorShape,
1897 block_text: Option<Line>,
1898}
1899
1900impl Cursor {
1901 pub fn new(
1902 origin: Vector2F,
1903 block_width: f32,
1904 line_height: f32,
1905 color: Color,
1906 shape: CursorShape,
1907 block_text: Option<Line>,
1908 ) -> Cursor {
1909 Cursor {
1910 origin,
1911 block_width,
1912 line_height,
1913 color,
1914 shape,
1915 block_text,
1916 }
1917 }
1918
1919 pub fn bounding_rect(&self, origin: Vector2F) -> RectF {
1920 RectF::new(
1921 self.origin + origin,
1922 vec2f(self.block_width, self.line_height),
1923 )
1924 }
1925
1926 pub fn paint(&self, origin: Vector2F, cx: &mut PaintContext) {
1927 let bounds = match self.shape {
1928 CursorShape::Bar => RectF::new(self.origin + origin, vec2f(2.0, self.line_height)),
1929 CursorShape::Block | CursorShape::Hollow => RectF::new(
1930 self.origin + origin,
1931 vec2f(self.block_width, self.line_height),
1932 ),
1933 CursorShape::Underscore => RectF::new(
1934 self.origin + origin + Vector2F::new(0.0, self.line_height - 2.0),
1935 vec2f(self.block_width, 2.0),
1936 ),
1937 };
1938
1939 //Draw background or border quad
1940 if matches!(self.shape, CursorShape::Hollow) {
1941 cx.scene.push_quad(Quad {
1942 bounds,
1943 background: None,
1944 border: Border::all(1., self.color),
1945 corner_radius: 0.,
1946 });
1947 } else {
1948 cx.scene.push_quad(Quad {
1949 bounds,
1950 background: Some(self.color),
1951 border: Default::default(),
1952 corner_radius: 0.,
1953 });
1954 }
1955
1956 if let Some(block_text) = &self.block_text {
1957 block_text.paint(self.origin + origin, bounds, self.line_height, cx);
1958 }
1959 }
1960
1961 pub fn shape(&self) -> CursorShape {
1962 self.shape
1963 }
1964}
1965
1966#[derive(Debug)]
1967pub struct HighlightedRange {
1968 pub start_y: f32,
1969 pub line_height: f32,
1970 pub lines: Vec<HighlightedRangeLine>,
1971 pub color: Color,
1972 pub corner_radius: f32,
1973}
1974
1975#[derive(Debug)]
1976pub struct HighlightedRangeLine {
1977 pub start_x: f32,
1978 pub end_x: f32,
1979}
1980
1981impl HighlightedRange {
1982 pub fn paint(&self, bounds: RectF, scene: &mut Scene) {
1983 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
1984 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
1985 self.paint_lines(
1986 self.start_y + self.line_height,
1987 &self.lines[1..],
1988 bounds,
1989 scene,
1990 );
1991 } else {
1992 self.paint_lines(self.start_y, &self.lines, bounds, scene);
1993 }
1994 }
1995
1996 fn paint_lines(
1997 &self,
1998 start_y: f32,
1999 lines: &[HighlightedRangeLine],
2000 bounds: RectF,
2001 scene: &mut Scene,
2002 ) {
2003 if lines.is_empty() {
2004 return;
2005 }
2006
2007 let mut path = PathBuilder::new();
2008 let first_line = lines.first().unwrap();
2009 let last_line = lines.last().unwrap();
2010
2011 let first_top_left = vec2f(first_line.start_x, start_y);
2012 let first_top_right = vec2f(first_line.end_x, start_y);
2013
2014 let curve_height = vec2f(0., self.corner_radius);
2015 let curve_width = |start_x: f32, end_x: f32| {
2016 let max = (end_x - start_x) / 2.;
2017 let width = if max < self.corner_radius {
2018 max
2019 } else {
2020 self.corner_radius
2021 };
2022
2023 vec2f(width, 0.)
2024 };
2025
2026 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
2027 path.reset(first_top_right - top_curve_width);
2028 path.curve_to(first_top_right + curve_height, first_top_right);
2029
2030 let mut iter = lines.iter().enumerate().peekable();
2031 while let Some((ix, line)) = iter.next() {
2032 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
2033
2034 if let Some((_, next_line)) = iter.peek() {
2035 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
2036
2037 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
2038 Ordering::Equal => {
2039 path.line_to(bottom_right);
2040 }
2041 Ordering::Less => {
2042 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
2043 path.line_to(bottom_right - curve_height);
2044 if self.corner_radius > 0. {
2045 path.curve_to(bottom_right - curve_width, bottom_right);
2046 }
2047 path.line_to(next_top_right + curve_width);
2048 if self.corner_radius > 0. {
2049 path.curve_to(next_top_right + curve_height, next_top_right);
2050 }
2051 }
2052 Ordering::Greater => {
2053 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
2054 path.line_to(bottom_right - curve_height);
2055 if self.corner_radius > 0. {
2056 path.curve_to(bottom_right + curve_width, bottom_right);
2057 }
2058 path.line_to(next_top_right - curve_width);
2059 if self.corner_radius > 0. {
2060 path.curve_to(next_top_right + curve_height, next_top_right);
2061 }
2062 }
2063 }
2064 } else {
2065 let curve_width = curve_width(line.start_x, line.end_x);
2066 path.line_to(bottom_right - curve_height);
2067 if self.corner_radius > 0. {
2068 path.curve_to(bottom_right - curve_width, bottom_right);
2069 }
2070
2071 let bottom_left = vec2f(line.start_x, bottom_right.y());
2072 path.line_to(bottom_left + curve_width);
2073 if self.corner_radius > 0. {
2074 path.curve_to(bottom_left - curve_height, bottom_left);
2075 }
2076 }
2077 }
2078
2079 if first_line.start_x > last_line.start_x {
2080 let curve_width = curve_width(last_line.start_x, first_line.start_x);
2081 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
2082 path.line_to(second_top_left + curve_height);
2083 if self.corner_radius > 0. {
2084 path.curve_to(second_top_left + curve_width, second_top_left);
2085 }
2086 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
2087 path.line_to(first_bottom_left - curve_width);
2088 if self.corner_radius > 0. {
2089 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
2090 }
2091 }
2092
2093 path.line_to(first_top_left + curve_height);
2094 if self.corner_radius > 0. {
2095 path.curve_to(first_top_left + top_curve_width, first_top_left);
2096 }
2097 path.line_to(first_top_right - top_curve_width);
2098
2099 scene.push_path(path.build(self.color, Some(bounds)));
2100 }
2101}
2102
2103pub fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
2104 delta.powf(1.5) / 100.0
2105}
2106
2107fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
2108 delta.powf(1.2) / 300.0
2109}
2110
2111#[cfg(test)]
2112mod tests {
2113 use std::sync::Arc;
2114
2115 use super::*;
2116 use crate::{
2117 display_map::{BlockDisposition, BlockProperties},
2118 Editor, MultiBuffer,
2119 };
2120 use settings::Settings;
2121 use util::test::sample_text;
2122
2123 #[gpui::test]
2124 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
2125 cx.set_global(Settings::test(cx));
2126 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
2127 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2128 Editor::new(EditorMode::Full, buffer, None, None, cx)
2129 });
2130 let element = EditorElement::new(
2131 editor.downgrade(),
2132 editor.read(cx).style(cx),
2133 CursorShape::Bar,
2134 );
2135
2136 let layouts = editor.update(cx, |editor, cx| {
2137 let snapshot = editor.snapshot(cx);
2138 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2139 let layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2140 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &layout_cx)
2141 });
2142 assert_eq!(layouts.len(), 6);
2143 }
2144
2145 #[gpui::test]
2146 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
2147 cx.set_global(Settings::test(cx));
2148 let buffer = MultiBuffer::build_simple("", cx);
2149 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
2150 Editor::new(EditorMode::Full, buffer, None, None, cx)
2151 });
2152
2153 editor.update(cx, |editor, cx| {
2154 editor.set_placeholder_text("hello", cx);
2155 editor.insert_blocks(
2156 [BlockProperties {
2157 style: BlockStyle::Fixed,
2158 disposition: BlockDisposition::Above,
2159 height: 3,
2160 position: Anchor::min(),
2161 render: Arc::new(|_| Empty::new().boxed()),
2162 }],
2163 cx,
2164 );
2165
2166 // Blur the editor so that it displays placeholder text.
2167 cx.blur();
2168 });
2169
2170 let mut element = EditorElement::new(
2171 editor.downgrade(),
2172 editor.read(cx).style(cx),
2173 CursorShape::Bar,
2174 );
2175
2176 let mut scene = Scene::new(1.0);
2177 let mut presenter = cx.build_presenter(window_id, 30., Default::default());
2178 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
2179 let (size, mut state) = element.layout(
2180 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
2181 &mut layout_cx,
2182 );
2183
2184 assert_eq!(state.position_map.line_layouts.len(), 4);
2185 assert_eq!(
2186 state
2187 .line_number_layouts
2188 .iter()
2189 .map(Option::is_some)
2190 .collect::<Vec<_>>(),
2191 &[false, false, false, true]
2192 );
2193
2194 // Don't panic.
2195 let bounds = RectF::new(Default::default(), size);
2196 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
2197 element.paint(bounds, bounds, &mut state, &mut paint_cx);
2198 }
2199}