1use super::{
2 display_map::{BlockContext, ToDisplayPoint},
3 Anchor, DisplayPoint, Editor, EditorMode, EditorSnapshot, Input, Scroll, Select, SelectPhase,
4 SoftWrap, ToPoint, MAX_LINE_LEN,
5};
6use crate::{
7 display_map::{DisplaySnapshot, TransformBlock},
8 EditorStyle, GoToDefinition,
9};
10use clock::ReplicaId;
11use collections::{BTreeMap, HashMap};
12use gpui::{
13 color::Color,
14 elements::*,
15 fonts::{HighlightStyle, Underline},
16 geometry::{
17 rect::RectF,
18 vector::{vec2f, Vector2F},
19 PathBuilder,
20 },
21 json::{self, ToJson},
22 platform::CursorStyle,
23 text_layout::{self, Line, RunStyle, TextLayoutCache},
24 AppContext, Axis, Border, CursorRegion, Element, ElementBox, Event, EventContext,
25 LayoutContext, MutableAppContext, PaintContext, Quad, Scene, SizeConstraint, ViewContext,
26 WeakViewHandle,
27};
28use json::json;
29use language::{Bias, DiagnosticSeverity, Selection};
30use settings::Settings;
31use smallvec::SmallVec;
32use std::{
33 cmp::{self, Ordering},
34 fmt::Write,
35 iter,
36 ops::Range,
37};
38
39struct SelectionLayout {
40 head: DisplayPoint,
41 range: Range<DisplayPoint>,
42}
43
44impl SelectionLayout {
45 fn new<T: ToPoint + ToDisplayPoint + Clone>(
46 selection: Selection<T>,
47 line_mode: bool,
48 map: &DisplaySnapshot,
49 ) -> Self {
50 if line_mode {
51 let selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
52 let point_range = map.expand_to_line(selection.range());
53 Self {
54 head: selection.head().to_display_point(map),
55 range: point_range.start.to_display_point(map)
56 ..point_range.end.to_display_point(map),
57 }
58 } else {
59 let selection = selection.map(|p| p.to_display_point(map));
60 Self {
61 head: selection.head(),
62 range: selection.range(),
63 }
64 }
65 }
66}
67
68pub struct EditorElement {
69 view: WeakViewHandle<Editor>,
70 style: EditorStyle,
71 cursor_shape: CursorShape,
72}
73
74impl EditorElement {
75 pub fn new(
76 view: WeakViewHandle<Editor>,
77 style: EditorStyle,
78 cursor_shape: CursorShape,
79 ) -> Self {
80 Self {
81 view,
82 style,
83 cursor_shape,
84 }
85 }
86
87 fn view<'a>(&self, cx: &'a AppContext) -> &'a Editor {
88 self.view.upgrade(cx).unwrap().read(cx)
89 }
90
91 fn update_view<F, T>(&self, cx: &mut MutableAppContext, f: F) -> T
92 where
93 F: FnOnce(&mut Editor, &mut ViewContext<Editor>) -> T,
94 {
95 self.view.upgrade(cx).unwrap().update(cx, f)
96 }
97
98 fn snapshot(&self, cx: &mut MutableAppContext) -> EditorSnapshot {
99 self.update_view(cx, |view, cx| view.snapshot(cx))
100 }
101
102 fn mouse_down(
103 &self,
104 position: Vector2F,
105 cmd: bool,
106 alt: bool,
107 shift: bool,
108 mut click_count: usize,
109 layout: &mut LayoutState,
110 paint: &mut PaintState,
111 cx: &mut EventContext,
112 ) -> bool {
113 if paint.gutter_bounds.contains_point(position) {
114 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
115 } else if !paint.text_bounds.contains_point(position) {
116 return false;
117 }
118
119 let snapshot = self.snapshot(cx.app);
120 let (position, overshoot) = paint.point_for_position(&snapshot, layout, position);
121
122 if cmd {
123 cx.dispatch_action(GoToDefinitionAt {
124 location: Some(position),
125 });
126 } else if shift && alt {
127 cx.dispatch_action(Select(SelectPhase::BeginColumnar {
128 position,
129 overshoot,
130 }));
131 } else if shift {
132 cx.dispatch_action(Select(SelectPhase::Extend {
133 position,
134 click_count,
135 }));
136 } else {
137 cx.dispatch_action(Select(SelectPhase::Begin {
138 position,
139 add: alt,
140 click_count,
141 }));
142 }
143
144 true
145 }
146
147 fn mouse_up(&self, _position: Vector2F, cx: &mut EventContext) -> bool {
148 if self.view(cx.app.as_ref()).is_selecting() {
149 cx.dispatch_action(Select(SelectPhase::End));
150 true
151 } else {
152 false
153 }
154 }
155
156 fn mouse_dragged(
157 &self,
158 position: Vector2F,
159 layout: &mut LayoutState,
160 paint: &mut PaintState,
161 cx: &mut EventContext,
162 ) -> bool {
163 let view = self.view(cx.app.as_ref());
164
165 if view.is_selecting() {
166 let rect = paint.text_bounds;
167 let mut scroll_delta = Vector2F::zero();
168
169 let vertical_margin = layout.line_height.min(rect.height() / 3.0);
170 let top = rect.origin_y() + vertical_margin;
171 let bottom = rect.lower_left().y() - vertical_margin;
172 if position.y() < top {
173 scroll_delta.set_y(-scale_vertical_mouse_autoscroll_delta(top - position.y()))
174 }
175 if position.y() > bottom {
176 scroll_delta.set_y(scale_vertical_mouse_autoscroll_delta(position.y() - bottom))
177 }
178
179 let horizontal_margin = layout.line_height.min(rect.width() / 3.0);
180 let left = rect.origin_x() + horizontal_margin;
181 let right = rect.upper_right().x() - horizontal_margin;
182 if position.x() < left {
183 scroll_delta.set_x(-scale_horizontal_mouse_autoscroll_delta(
184 left - position.x(),
185 ))
186 }
187 if position.x() > right {
188 scroll_delta.set_x(scale_horizontal_mouse_autoscroll_delta(
189 position.x() - right,
190 ))
191 }
192
193 let snapshot = self.snapshot(cx.app);
194 let (position, overshoot) = paint.point_for_position(&snapshot, layout, position);
195
196 cx.dispatch_action(Select(SelectPhase::Update {
197 position,
198 overshoot,
199 scroll_position: (snapshot.scroll_position() + scroll_delta)
200 .clamp(Vector2F::zero(), layout.scroll_max),
201 }));
202 true
203 } else {
204 false
205 }
206 }
207
208 fn key_down(&self, input: Option<&str>, cx: &mut EventContext) -> bool {
209 let view = self.view.upgrade(cx.app).unwrap();
210
211 if view.is_focused(cx.app) {
212 if let Some(input) = input {
213 cx.dispatch_action(Input(input.to_string()));
214 true
215 } else {
216 false
217 }
218 } else {
219 false
220 }
221 }
222
223 fn scroll(
224 &self,
225 position: Vector2F,
226 mut delta: Vector2F,
227 precise: bool,
228 layout: &mut LayoutState,
229 paint: &mut PaintState,
230 cx: &mut EventContext,
231 ) -> bool {
232 if !paint.bounds.contains_point(position) {
233 return false;
234 }
235
236 let snapshot = self.snapshot(cx.app);
237 let max_glyph_width = layout.em_width;
238 if !precise {
239 delta *= vec2f(max_glyph_width, layout.line_height);
240 }
241
242 let scroll_position = snapshot.scroll_position();
243 let x = (scroll_position.x() * max_glyph_width - delta.x()) / max_glyph_width;
244 let y = (scroll_position.y() * layout.line_height - delta.y()) / layout.line_height;
245 let scroll_position = vec2f(x, y).clamp(Vector2F::zero(), layout.scroll_max);
246
247 cx.dispatch_action(Scroll(scroll_position));
248
249 true
250 }
251
252 fn paint_background(
253 &self,
254 gutter_bounds: RectF,
255 text_bounds: RectF,
256 layout: &LayoutState,
257 cx: &mut PaintContext,
258 ) {
259 let bounds = gutter_bounds.union_rect(text_bounds);
260 let scroll_top = layout.snapshot.scroll_position().y() * layout.line_height;
261 let editor = self.view(cx.app);
262 cx.scene.push_quad(Quad {
263 bounds: gutter_bounds,
264 background: Some(self.style.gutter_background),
265 border: Border::new(0., Color::transparent_black()),
266 corner_radius: 0.,
267 });
268 cx.scene.push_quad(Quad {
269 bounds: text_bounds,
270 background: Some(self.style.background),
271 border: Border::new(0., Color::transparent_black()),
272 corner_radius: 0.,
273 });
274
275 if let EditorMode::Full = editor.mode {
276 let mut active_rows = layout.active_rows.iter().peekable();
277 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
278 let mut end_row = *start_row;
279 while active_rows.peek().map_or(false, |r| {
280 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
281 }) {
282 active_rows.next().unwrap();
283 end_row += 1;
284 }
285
286 if !contains_non_empty_selection {
287 let origin = vec2f(
288 bounds.origin_x(),
289 bounds.origin_y() + (layout.line_height * *start_row as f32) - scroll_top,
290 );
291 let size = vec2f(
292 bounds.width(),
293 layout.line_height * (end_row - start_row + 1) as f32,
294 );
295 cx.scene.push_quad(Quad {
296 bounds: RectF::new(origin, size),
297 background: Some(self.style.active_line_background),
298 border: Border::default(),
299 corner_radius: 0.,
300 });
301 }
302 }
303
304 if let Some(highlighted_rows) = &layout.highlighted_rows {
305 let origin = vec2f(
306 bounds.origin_x(),
307 bounds.origin_y() + (layout.line_height * highlighted_rows.start as f32)
308 - scroll_top,
309 );
310 let size = vec2f(
311 bounds.width(),
312 layout.line_height * highlighted_rows.len() as f32,
313 );
314 cx.scene.push_quad(Quad {
315 bounds: RectF::new(origin, size),
316 background: Some(self.style.highlighted_line_background),
317 border: Border::default(),
318 corner_radius: 0.,
319 });
320 }
321 }
322 }
323
324 fn paint_gutter(
325 &mut self,
326 bounds: RectF,
327 visible_bounds: RectF,
328 layout: &mut LayoutState,
329 cx: &mut PaintContext,
330 ) {
331 let scroll_top = layout.snapshot.scroll_position().y() * layout.line_height;
332 for (ix, line) in layout.line_number_layouts.iter().enumerate() {
333 if let Some(line) = line {
334 let line_origin = bounds.origin()
335 + vec2f(
336 bounds.width() - line.width() - layout.gutter_padding,
337 ix as f32 * layout.line_height - (scroll_top % layout.line_height),
338 );
339 line.paint(line_origin, visible_bounds, layout.line_height, cx);
340 }
341 }
342
343 if let Some((row, indicator)) = layout.code_actions_indicator.as_mut() {
344 let mut x = bounds.width() - layout.gutter_padding;
345 let mut y = *row as f32 * layout.line_height - scroll_top;
346 x += ((layout.gutter_padding + layout.gutter_margin) - indicator.size().x()) / 2.;
347 y += (layout.line_height - indicator.size().y()) / 2.;
348 indicator.paint(bounds.origin() + vec2f(x, y), visible_bounds, cx);
349 }
350 }
351
352 fn paint_text(
353 &mut self,
354 bounds: RectF,
355 visible_bounds: RectF,
356 layout: &mut LayoutState,
357 cx: &mut PaintContext,
358 ) {
359 let view = self.view(cx.app);
360 let style = &self.style;
361 let local_replica_id = view.replica_id(cx);
362 let scroll_position = layout.snapshot.scroll_position();
363 let start_row = scroll_position.y() as u32;
364 let scroll_top = scroll_position.y() * layout.line_height;
365 let end_row = ((scroll_top + bounds.height()) / layout.line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
366 let max_glyph_width = layout.em_width;
367 let scroll_left = scroll_position.x() * max_glyph_width;
368 let content_origin = bounds.origin() + vec2f(layout.gutter_margin, 0.);
369
370 cx.scene.push_layer(Some(bounds));
371 cx.scene.push_cursor_region(CursorRegion {
372 bounds,
373 style: CursorStyle::IBeam,
374 });
375
376 for (range, color) in &layout.highlighted_ranges {
377 self.paint_highlighted_range(
378 range.clone(),
379 start_row,
380 end_row,
381 *color,
382 0.,
383 0.15 * layout.line_height,
384 layout,
385 content_origin,
386 scroll_top,
387 scroll_left,
388 bounds,
389 cx,
390 );
391 }
392
393 let mut cursors = SmallVec::<[Cursor; 32]>::new();
394 for (replica_id, selections) in &layout.selections {
395 let selection_style = style.replica_selection_style(*replica_id);
396 let corner_radius = 0.15 * layout.line_height;
397
398 for selection in selections {
399 self.paint_highlighted_range(
400 selection.range.clone(),
401 start_row,
402 end_row,
403 selection_style.selection,
404 corner_radius,
405 corner_radius * 2.,
406 layout,
407 content_origin,
408 scroll_top,
409 scroll_left,
410 bounds,
411 cx,
412 );
413
414 if view.show_local_cursors() || *replica_id != local_replica_id {
415 let cursor_position = selection.head;
416 if (start_row..end_row).contains(&cursor_position.row()) {
417 let cursor_row_layout =
418 &layout.line_layouts[(cursor_position.row() - start_row) as usize];
419 let cursor_column = cursor_position.column() as usize;
420
421 let cursor_character_x = cursor_row_layout.x_for_index(cursor_column);
422 let mut block_width =
423 cursor_row_layout.x_for_index(cursor_column + 1) - cursor_character_x;
424 if block_width == 0.0 {
425 block_width = layout.em_width;
426 }
427
428 let block_text =
429 if matches!(self.cursor_shape, CursorShape::Block) {
430 layout.snapshot.chars_at(cursor_position).next().and_then(
431 |character| {
432 let font_id =
433 cursor_row_layout.font_for_index(cursor_column)?;
434 let text = character.to_string();
435
436 Some(cx.text_layout_cache.layout_str(
437 &text,
438 cursor_row_layout.font_size(),
439 &[(
440 text.len(),
441 RunStyle {
442 font_id,
443 color: style.background,
444 underline: Default::default(),
445 },
446 )],
447 ))
448 },
449 )
450 } else {
451 None
452 };
453
454 let x = cursor_character_x - scroll_left;
455 let y = cursor_position.row() as f32 * layout.line_height - scroll_top;
456 cursors.push(Cursor {
457 color: selection_style.cursor,
458 block_width,
459 origin: content_origin + vec2f(x, y),
460 line_height: layout.line_height,
461 shape: self.cursor_shape,
462 block_text,
463 });
464 }
465 }
466 }
467 }
468
469 if let Some(visible_text_bounds) = bounds.intersection(visible_bounds) {
470 // Draw glyphs
471 for (ix, line) in layout.line_layouts.iter().enumerate() {
472 let row = start_row + ix as u32;
473 line.paint(
474 content_origin
475 + vec2f(-scroll_left, row as f32 * layout.line_height - scroll_top),
476 visible_text_bounds,
477 layout.line_height,
478 cx,
479 );
480 }
481 }
482
483 cx.scene.push_layer(Some(bounds));
484 for cursor in cursors {
485 cursor.paint(cx);
486 }
487 cx.scene.pop_layer();
488
489 if let Some((position, context_menu)) = layout.context_menu.as_mut() {
490 cx.scene.push_stacking_context(None);
491
492 let cursor_row_layout = &layout.line_layouts[(position.row() - start_row) as usize];
493 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
494 let y = (position.row() + 1) as f32 * layout.line_height - scroll_top;
495 let mut list_origin = content_origin + vec2f(x, y);
496 let list_height = context_menu.size().y();
497
498 if list_origin.y() + list_height > bounds.lower_left().y() {
499 list_origin.set_y(list_origin.y() - layout.line_height - list_height);
500 }
501
502 context_menu.paint(
503 list_origin,
504 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
505 cx,
506 );
507
508 cx.scene.pop_stacking_context();
509 }
510
511 cx.scene.pop_layer();
512 }
513
514 fn paint_highlighted_range(
515 &self,
516 range: Range<DisplayPoint>,
517 start_row: u32,
518 end_row: u32,
519 color: Color,
520 corner_radius: f32,
521 line_end_overshoot: f32,
522 layout: &LayoutState,
523 content_origin: Vector2F,
524 scroll_top: f32,
525 scroll_left: f32,
526 bounds: RectF,
527 cx: &mut PaintContext,
528 ) {
529 if range.start != range.end {
530 let row_range = if range.end.column() == 0 {
531 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
532 } else {
533 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
534 };
535
536 let highlighted_range = HighlightedRange {
537 color,
538 line_height: layout.line_height,
539 corner_radius,
540 start_y: content_origin.y() + row_range.start as f32 * layout.line_height
541 - scroll_top,
542 lines: row_range
543 .into_iter()
544 .map(|row| {
545 let line_layout = &layout.line_layouts[(row - start_row) as usize];
546 HighlightedRangeLine {
547 start_x: if row == range.start.row() {
548 content_origin.x()
549 + line_layout.x_for_index(range.start.column() as usize)
550 - scroll_left
551 } else {
552 content_origin.x() - scroll_left
553 },
554 end_x: if row == range.end.row() {
555 content_origin.x()
556 + line_layout.x_for_index(range.end.column() as usize)
557 - scroll_left
558 } else {
559 content_origin.x() + line_layout.width() + line_end_overshoot
560 - scroll_left
561 },
562 }
563 })
564 .collect(),
565 };
566
567 highlighted_range.paint(bounds, cx.scene);
568 }
569 }
570
571 fn paint_blocks(
572 &mut self,
573 bounds: RectF,
574 visible_bounds: RectF,
575 layout: &mut LayoutState,
576 cx: &mut PaintContext,
577 ) {
578 let scroll_position = layout.snapshot.scroll_position();
579 let scroll_left = scroll_position.x() * layout.em_width;
580 let scroll_top = scroll_position.y() * layout.line_height;
581
582 for (row, element) in &mut layout.blocks {
583 let origin = bounds.origin()
584 + vec2f(-scroll_left, *row as f32 * layout.line_height - scroll_top);
585 element.paint(origin, visible_bounds, cx);
586 }
587 }
588
589 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
590 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
591 let style = &self.style;
592
593 cx.text_layout_cache
594 .layout_str(
595 "1".repeat(digit_count).as_str(),
596 style.text.font_size,
597 &[(
598 digit_count,
599 RunStyle {
600 font_id: style.text.font_id,
601 color: Color::black(),
602 underline: Default::default(),
603 },
604 )],
605 )
606 .width()
607 }
608
609 fn layout_line_numbers(
610 &self,
611 rows: Range<u32>,
612 active_rows: &BTreeMap<u32, bool>,
613 snapshot: &EditorSnapshot,
614 cx: &LayoutContext,
615 ) -> Vec<Option<text_layout::Line>> {
616 let style = &self.style;
617 let include_line_numbers = snapshot.mode == EditorMode::Full;
618 let mut line_number_layouts = Vec::with_capacity(rows.len());
619 let mut line_number = String::new();
620 for (ix, row) in snapshot
621 .buffer_rows(rows.start)
622 .take((rows.end - rows.start) as usize)
623 .enumerate()
624 {
625 let display_row = rows.start + ix as u32;
626 let color = if active_rows.contains_key(&display_row) {
627 style.line_number_active
628 } else {
629 style.line_number
630 };
631 if let Some(buffer_row) = row {
632 if include_line_numbers {
633 line_number.clear();
634 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
635 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
636 &line_number,
637 style.text.font_size,
638 &[(
639 line_number.len(),
640 RunStyle {
641 font_id: style.text.font_id,
642 color,
643 underline: Default::default(),
644 },
645 )],
646 )));
647 }
648 } else {
649 line_number_layouts.push(None);
650 }
651 }
652
653 line_number_layouts
654 }
655
656 fn layout_lines(
657 &mut self,
658 rows: Range<u32>,
659 snapshot: &EditorSnapshot,
660 cx: &LayoutContext,
661 ) -> Vec<text_layout::Line> {
662 if rows.start >= rows.end {
663 return Vec::new();
664 }
665
666 // When the editor is empty and unfocused, then show the placeholder.
667 if snapshot.is_empty() && !snapshot.is_focused() {
668 let placeholder_style = self
669 .style
670 .placeholder_text
671 .as_ref()
672 .unwrap_or_else(|| &self.style.text);
673 let placeholder_text = snapshot.placeholder_text();
674 let placeholder_lines = placeholder_text
675 .as_ref()
676 .map_or("", AsRef::as_ref)
677 .split('\n')
678 .skip(rows.start as usize)
679 .chain(iter::repeat(""))
680 .take(rows.len());
681 return placeholder_lines
682 .map(|line| {
683 cx.text_layout_cache.layout_str(
684 line,
685 placeholder_style.font_size,
686 &[(
687 line.len(),
688 RunStyle {
689 font_id: placeholder_style.font_id,
690 color: placeholder_style.color,
691 underline: Default::default(),
692 },
693 )],
694 )
695 })
696 .collect();
697 } else {
698 let style = &self.style;
699 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
700 let mut highlight_style = chunk
701 .syntax_highlight_id
702 .and_then(|id| id.style(&style.syntax));
703
704 if let Some(chunk_highlight) = chunk.highlight_style {
705 if let Some(highlight_style) = highlight_style.as_mut() {
706 highlight_style.highlight(chunk_highlight);
707 } else {
708 highlight_style = Some(chunk_highlight);
709 }
710 }
711
712 let mut diagnostic_highlight = HighlightStyle::default();
713
714 if chunk.is_unnecessary {
715 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
716 }
717
718 if let Some(severity) = chunk.diagnostic_severity {
719 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
720 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
721 let diagnostic_style = super::diagnostic_style(severity, true, style);
722 diagnostic_highlight.underline = Some(Underline {
723 color: Some(diagnostic_style.message.text.color),
724 thickness: 1.0.into(),
725 squiggly: true,
726 });
727 }
728 }
729
730 if let Some(highlight_style) = highlight_style.as_mut() {
731 highlight_style.highlight(diagnostic_highlight);
732 } else {
733 highlight_style = Some(diagnostic_highlight);
734 }
735
736 (chunk.text, highlight_style)
737 });
738 layout_highlighted_chunks(
739 chunks,
740 &style.text,
741 &cx.text_layout_cache,
742 &cx.font_cache,
743 MAX_LINE_LEN,
744 rows.len() as usize,
745 )
746 }
747 }
748
749 fn layout_blocks(
750 &mut self,
751 rows: Range<u32>,
752 snapshot: &EditorSnapshot,
753 width: f32,
754 gutter_padding: f32,
755 gutter_width: f32,
756 em_width: f32,
757 text_x: f32,
758 line_height: f32,
759 style: &EditorStyle,
760 line_layouts: &[text_layout::Line],
761 cx: &mut LayoutContext,
762 ) -> Vec<(u32, ElementBox)> {
763 let editor = if let Some(editor) = self.view.upgrade(cx) {
764 editor
765 } else {
766 return Default::default();
767 };
768
769 let scroll_x = snapshot.scroll_position.x();
770 snapshot
771 .blocks_in_range(rows.clone())
772 .map(|(block_row, block)| {
773 let mut element = match block {
774 TransformBlock::Custom(block) => {
775 let align_to = block
776 .position()
777 .to_point(&snapshot.buffer_snapshot)
778 .to_display_point(snapshot);
779 let anchor_x = text_x
780 + if rows.contains(&align_to.row()) {
781 line_layouts[(align_to.row() - rows.start) as usize]
782 .x_for_index(align_to.column() as usize)
783 } else {
784 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
785 .x_for_index(align_to.column() as usize)
786 };
787
788 cx.render(&editor, |_, cx| {
789 block.render(&mut BlockContext {
790 cx,
791 anchor_x,
792 gutter_padding,
793 line_height,
794 scroll_x,
795 gutter_width,
796 em_width,
797 })
798 })
799 }
800 TransformBlock::ExcerptHeader {
801 buffer,
802 starts_new_buffer,
803 ..
804 } => {
805 if *starts_new_buffer {
806 let style = &self.style.diagnostic_path_header;
807 let font_size =
808 (style.text_scale_factor * self.style.text.font_size).round();
809
810 let mut filename = None;
811 let mut parent_path = None;
812 if let Some(path) = buffer.path() {
813 filename =
814 path.file_name().map(|f| f.to_string_lossy().to_string());
815 parent_path =
816 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
817 }
818
819 Flex::row()
820 .with_child(
821 Label::new(
822 filename.unwrap_or_else(|| "untitled".to_string()),
823 style.filename.text.clone().with_font_size(font_size),
824 )
825 .contained()
826 .with_style(style.filename.container)
827 .boxed(),
828 )
829 .with_children(parent_path.map(|path| {
830 Label::new(
831 path,
832 style.path.text.clone().with_font_size(font_size),
833 )
834 .contained()
835 .with_style(style.path.container)
836 .boxed()
837 }))
838 .aligned()
839 .left()
840 .contained()
841 .with_style(style.container)
842 .with_padding_left(gutter_padding + scroll_x * em_width)
843 .expanded()
844 .named("path header block")
845 } else {
846 let text_style = self.style.text.clone();
847 Label::new("…".to_string(), text_style)
848 .contained()
849 .with_padding_left(gutter_padding + scroll_x * em_width)
850 .named("collapsed context")
851 }
852 }
853 };
854
855 element.layout(
856 SizeConstraint {
857 min: Vector2F::zero(),
858 max: vec2f(width, block.height() as f32 * line_height),
859 },
860 cx,
861 );
862 (block_row, element)
863 })
864 .collect()
865 }
866}
867
868impl Element for EditorElement {
869 type LayoutState = LayoutState;
870 type PaintState = PaintState;
871
872 fn layout(
873 &mut self,
874 constraint: SizeConstraint,
875 cx: &mut LayoutContext,
876 ) -> (Vector2F, Self::LayoutState) {
877 let mut size = constraint.max;
878 if size.x().is_infinite() {
879 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
880 }
881
882 let snapshot = self.snapshot(cx.app);
883 let style = self.style.clone();
884 let line_height = style.text.line_height(cx.font_cache);
885
886 let gutter_padding;
887 let gutter_width;
888 let gutter_margin;
889 if snapshot.mode == EditorMode::Full {
890 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
891 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
892 gutter_margin = -style.text.descent(cx.font_cache);
893 } else {
894 gutter_padding = 0.0;
895 gutter_width = 0.0;
896 gutter_margin = 0.0;
897 };
898
899 let text_width = size.x() - gutter_width;
900 let em_width = style.text.em_width(cx.font_cache);
901 let em_advance = style.text.em_advance(cx.font_cache);
902 let overscroll = vec2f(em_width, 0.);
903 let snapshot = self.update_view(cx.app, |view, cx| {
904 let wrap_width = match view.soft_wrap_mode(cx) {
905 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
906 SoftWrap::EditorWidth => {
907 Some(text_width - gutter_margin - overscroll.x() - em_width)
908 }
909 SoftWrap::Column(column) => Some(column as f32 * em_advance),
910 };
911
912 if view.set_wrap_width(wrap_width, cx) {
913 view.snapshot(cx)
914 } else {
915 snapshot
916 }
917 });
918
919 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
920 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
921 size.set_y(
922 scroll_height
923 .min(constraint.max_along(Axis::Vertical))
924 .max(constraint.min_along(Axis::Vertical))
925 .min(line_height * max_lines as f32),
926 )
927 } else if let EditorMode::SingleLine = snapshot.mode {
928 size.set_y(
929 line_height
930 .min(constraint.max_along(Axis::Vertical))
931 .max(constraint.min_along(Axis::Vertical)),
932 )
933 } else if size.y().is_infinite() {
934 size.set_y(scroll_height);
935 }
936 let gutter_size = vec2f(gutter_width, size.y());
937 let text_size = vec2f(text_width, size.y());
938
939 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
940 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
941 let snapshot = view.snapshot(cx);
942 (autoscroll_horizontally, snapshot)
943 });
944
945 let scroll_position = snapshot.scroll_position();
946 let start_row = scroll_position.y() as u32;
947 let scroll_top = scroll_position.y() * line_height;
948
949 // Add 1 to ensure selections bleed off screen
950 let end_row = 1 + cmp::min(
951 ((scroll_top + size.y()) / line_height).ceil() as u32,
952 snapshot.max_point().row(),
953 );
954
955 let start_anchor = if start_row == 0 {
956 Anchor::min()
957 } else {
958 snapshot
959 .buffer_snapshot
960 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
961 };
962 let end_anchor = if end_row > snapshot.max_point().row() {
963 Anchor::max()
964 } else {
965 snapshot
966 .buffer_snapshot
967 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
968 };
969
970 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
971 let mut active_rows = BTreeMap::new();
972 let mut highlighted_rows = None;
973 let mut highlighted_ranges = Vec::new();
974 self.update_view(cx.app, |view, cx| {
975 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
976
977 highlighted_rows = view.highlighted_rows();
978 let theme = cx.global::<Settings>().theme.as_ref();
979 highlighted_ranges = view.background_highlights_in_range(
980 start_anchor.clone()..end_anchor.clone(),
981 &display_map,
982 theme,
983 );
984
985 let mut remote_selections = HashMap::default();
986 for (replica_id, line_mode, selection) in display_map
987 .buffer_snapshot
988 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
989 {
990 // The local selections match the leader's selections.
991 if Some(replica_id) == view.leader_replica_id {
992 continue;
993 }
994 remote_selections
995 .entry(replica_id)
996 .or_insert(Vec::new())
997 .push(SelectionLayout::new(selection, line_mode, &display_map));
998 }
999 selections.extend(remote_selections);
1000
1001 if view.show_local_selections {
1002 let mut local_selections = view
1003 .selections
1004 .disjoint_in_range(start_anchor..end_anchor, cx);
1005 local_selections.extend(view.selections.pending(cx));
1006 for selection in &local_selections {
1007 let is_empty = selection.start == selection.end;
1008 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1009 let selection_end = snapshot.next_line_boundary(selection.end).1;
1010 for row in cmp::max(selection_start.row(), start_row)
1011 ..=cmp::min(selection_end.row(), end_row)
1012 {
1013 let contains_non_empty_selection =
1014 active_rows.entry(row).or_insert(!is_empty);
1015 *contains_non_empty_selection |= !is_empty;
1016 }
1017 }
1018
1019 // Render the local selections in the leader's color when following.
1020 let local_replica_id = view.leader_replica_id.unwrap_or(view.replica_id(cx));
1021
1022 selections.push((
1023 local_replica_id,
1024 local_selections
1025 .into_iter()
1026 .map(|selection| {
1027 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1028 })
1029 .collect(),
1030 ));
1031 }
1032 });
1033
1034 let line_number_layouts =
1035 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1036
1037 let mut max_visible_line_width = 0.0;
1038 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1039 for line in &line_layouts {
1040 if line.width() > max_visible_line_width {
1041 max_visible_line_width = line.width();
1042 }
1043 }
1044
1045 let style = self.style.clone();
1046 let longest_line_width = layout_line(
1047 snapshot.longest_row(),
1048 &snapshot,
1049 &style,
1050 cx.text_layout_cache,
1051 )
1052 .width();
1053 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1054 let em_width = style.text.em_width(cx.font_cache);
1055 let max_row = snapshot.max_point().row();
1056 let scroll_max = vec2f(
1057 ((scroll_width - text_size.x()) / em_width).max(0.0),
1058 max_row.saturating_sub(1) as f32,
1059 );
1060
1061 self.update_view(cx.app, |view, cx| {
1062 let clamped = view.clamp_scroll_left(scroll_max.x());
1063 let autoscrolled;
1064 if autoscroll_horizontally {
1065 autoscrolled = view.autoscroll_horizontally(
1066 start_row,
1067 text_size.x(),
1068 scroll_width,
1069 em_width,
1070 &line_layouts,
1071 cx,
1072 );
1073 } else {
1074 autoscrolled = false;
1075 }
1076
1077 if clamped || autoscrolled {
1078 snapshot = view.snapshot(cx);
1079 }
1080 });
1081
1082 let mut context_menu = None;
1083 let mut code_actions_indicator = None;
1084 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1085 let newest_selection_head = view
1086 .selections
1087 .newest::<usize>(cx)
1088 .head()
1089 .to_display_point(&snapshot);
1090
1091 if (start_row..end_row).contains(&newest_selection_head.row()) {
1092 let style = view.style(cx);
1093 if view.context_menu_visible() {
1094 context_menu =
1095 view.render_context_menu(newest_selection_head, style.clone(), cx);
1096 }
1097
1098 code_actions_indicator = view
1099 .render_code_actions_indicator(&style, cx)
1100 .map(|indicator| (newest_selection_head.row(), indicator));
1101 }
1102 });
1103
1104 if let Some((_, context_menu)) = context_menu.as_mut() {
1105 context_menu.layout(
1106 SizeConstraint {
1107 min: Vector2F::zero(),
1108 max: vec2f(
1109 f32::INFINITY,
1110 (12. * line_height).min((size.y() - line_height) / 2.),
1111 ),
1112 },
1113 cx,
1114 );
1115 }
1116
1117 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1118 indicator.layout(
1119 SizeConstraint::strict_along(Axis::Vertical, line_height * 0.618),
1120 cx,
1121 );
1122 }
1123
1124 let blocks = self.layout_blocks(
1125 start_row..end_row,
1126 &snapshot,
1127 size.x().max(scroll_width + gutter_width),
1128 gutter_padding,
1129 gutter_width,
1130 em_width,
1131 gutter_width + gutter_margin,
1132 line_height,
1133 &style,
1134 &line_layouts,
1135 cx,
1136 );
1137
1138 (
1139 size,
1140 LayoutState {
1141 size,
1142 scroll_max,
1143 gutter_size,
1144 gutter_padding,
1145 text_size,
1146 gutter_margin,
1147 snapshot,
1148 active_rows,
1149 highlighted_rows,
1150 highlighted_ranges,
1151 line_layouts,
1152 line_number_layouts,
1153 blocks,
1154 line_height,
1155 em_width,
1156 em_advance,
1157 selections,
1158 context_menu,
1159 code_actions_indicator,
1160 },
1161 )
1162 }
1163
1164 fn paint(
1165 &mut self,
1166 bounds: RectF,
1167 visible_bounds: RectF,
1168 layout: &mut Self::LayoutState,
1169 cx: &mut PaintContext,
1170 ) -> Self::PaintState {
1171 cx.scene.push_layer(Some(bounds));
1172
1173 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1174 let text_bounds = RectF::new(
1175 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1176 layout.text_size,
1177 );
1178
1179 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1180 if layout.gutter_size.x() > 0. {
1181 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1182 }
1183 self.paint_text(text_bounds, visible_bounds, layout, cx);
1184
1185 if !layout.blocks.is_empty() {
1186 cx.scene.push_layer(Some(bounds));
1187 self.paint_blocks(bounds, visible_bounds, layout, cx);
1188 cx.scene.pop_layer();
1189 }
1190
1191 cx.scene.pop_layer();
1192
1193 PaintState {
1194 bounds,
1195 gutter_bounds,
1196 text_bounds,
1197 }
1198 }
1199
1200 fn dispatch_event(
1201 &mut self,
1202 event: &Event,
1203 _: RectF,
1204 _: RectF,
1205 layout: &mut LayoutState,
1206 paint: &mut PaintState,
1207 cx: &mut EventContext,
1208 ) -> bool {
1209 if let Some((_, context_menu)) = &mut layout.context_menu {
1210 if context_menu.dispatch_event(event, cx) {
1211 return true;
1212 }
1213 }
1214
1215 if let Some((_, indicator)) = &mut layout.code_actions_indicator {
1216 if indicator.dispatch_event(event, cx) {
1217 return true;
1218 }
1219 }
1220
1221 for (_, block) in &mut layout.blocks {
1222 if block.dispatch_event(event, cx) {
1223 return true;
1224 }
1225 }
1226
1227 match event {
1228 Event::LeftMouseDown {
1229 position,
1230 cmd,
1231 alt,
1232 shift,
1233 click_count,
1234 ..
1235 } => self.mouse_down(
1236 *position,
1237 *cmd,
1238 *alt,
1239 *shift,
1240 *click_count,
1241 layout,
1242 paint,
1243 cx,
1244 ),
1245 Event::LeftMouseUp { position, .. } => self.mouse_up(*position, cx),
1246 Event::LeftMouseDragged { position } => {
1247 self.mouse_dragged(*position, layout, paint, cx)
1248 }
1249 Event::ScrollWheel {
1250 position,
1251 delta,
1252 precise,
1253 } => self.scroll(*position, *delta, *precise, layout, paint, cx),
1254 Event::KeyDown { input, .. } => self.key_down(input.as_deref(), cx),
1255 _ => false,
1256 }
1257 }
1258
1259 fn debug(
1260 &self,
1261 bounds: RectF,
1262 _: &Self::LayoutState,
1263 _: &Self::PaintState,
1264 _: &gpui::DebugContext,
1265 ) -> json::Value {
1266 json!({
1267 "type": "BufferElement",
1268 "bounds": bounds.to_json()
1269 })
1270 }
1271}
1272
1273pub struct LayoutState {
1274 size: Vector2F,
1275 scroll_max: Vector2F,
1276 gutter_size: Vector2F,
1277 gutter_padding: f32,
1278 gutter_margin: f32,
1279 text_size: Vector2F,
1280 snapshot: EditorSnapshot,
1281 active_rows: BTreeMap<u32, bool>,
1282 highlighted_rows: Option<Range<u32>>,
1283 line_layouts: Vec<text_layout::Line>,
1284 line_number_layouts: Vec<Option<text_layout::Line>>,
1285 blocks: Vec<(u32, ElementBox)>,
1286 line_height: f32,
1287 em_width: f32,
1288 em_advance: f32,
1289 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1290 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1291 context_menu: Option<(DisplayPoint, ElementBox)>,
1292 code_actions_indicator: Option<(u32, ElementBox)>,
1293}
1294
1295fn layout_line(
1296 row: u32,
1297 snapshot: &EditorSnapshot,
1298 style: &EditorStyle,
1299 layout_cache: &TextLayoutCache,
1300) -> text_layout::Line {
1301 let mut line = snapshot.line(row);
1302
1303 if line.len() > MAX_LINE_LEN {
1304 let mut len = MAX_LINE_LEN;
1305 while !line.is_char_boundary(len) {
1306 len -= 1;
1307 }
1308
1309 line.truncate(len);
1310 }
1311
1312 layout_cache.layout_str(
1313 &line,
1314 style.text.font_size,
1315 &[(
1316 snapshot.line_len(row) as usize,
1317 RunStyle {
1318 font_id: style.text.font_id,
1319 color: Color::black(),
1320 underline: Default::default(),
1321 },
1322 )],
1323 )
1324}
1325
1326pub struct PaintState {
1327 bounds: RectF,
1328 gutter_bounds: RectF,
1329 text_bounds: RectF,
1330}
1331
1332impl PaintState {
1333 fn point_for_position(
1334 &self,
1335 snapshot: &EditorSnapshot,
1336 layout: &LayoutState,
1337 position: Vector2F,
1338 ) -> (DisplayPoint, u32) {
1339 let scroll_position = snapshot.scroll_position();
1340 let position = position - self.text_bounds.origin();
1341 let y = position.y().max(0.0).min(layout.size.y());
1342 let row = ((y / layout.line_height) + scroll_position.y()) as u32;
1343 let row = cmp::min(row, snapshot.max_point().row());
1344 let line = &layout.line_layouts[(row - scroll_position.y() as u32) as usize];
1345 let x = position.x() + (scroll_position.x() * layout.em_width);
1346
1347 let column = if x >= 0.0 {
1348 line.index_for_x(x)
1349 .map(|ix| ix as u32)
1350 .unwrap_or_else(|| snapshot.line_len(row))
1351 } else {
1352 0
1353 };
1354 let overshoot = (0f32.max(x - line.width()) / layout.em_advance) as u32;
1355
1356 (DisplayPoint::new(row, column), overshoot)
1357 }
1358}
1359
1360#[derive(Copy, Clone, PartialEq, Eq)]
1361pub enum CursorShape {
1362 Bar,
1363 Block,
1364 Underscore,
1365}
1366
1367impl Default for CursorShape {
1368 fn default() -> Self {
1369 CursorShape::Bar
1370 }
1371}
1372
1373struct Cursor {
1374 origin: Vector2F,
1375 block_width: f32,
1376 line_height: f32,
1377 color: Color,
1378 shape: CursorShape,
1379 block_text: Option<Line>,
1380}
1381
1382impl Cursor {
1383 fn paint(&self, cx: &mut PaintContext) {
1384 let bounds = match self.shape {
1385 CursorShape::Bar => RectF::new(self.origin, vec2f(2.0, self.line_height)),
1386 CursorShape::Block => {
1387 RectF::new(self.origin, vec2f(self.block_width, self.line_height))
1388 }
1389 CursorShape::Underscore => RectF::new(
1390 self.origin + Vector2F::new(0.0, self.line_height - 2.0),
1391 vec2f(self.block_width, 2.0),
1392 ),
1393 };
1394
1395 cx.scene.push_quad(Quad {
1396 bounds,
1397 background: Some(self.color),
1398 border: Border::new(0., Color::black()),
1399 corner_radius: 0.,
1400 });
1401
1402 if let Some(block_text) = &self.block_text {
1403 block_text.paint(self.origin, bounds, self.line_height, cx);
1404 }
1405 }
1406}
1407
1408#[derive(Debug)]
1409struct HighlightedRange {
1410 start_y: f32,
1411 line_height: f32,
1412 lines: Vec<HighlightedRangeLine>,
1413 color: Color,
1414 corner_radius: f32,
1415}
1416
1417#[derive(Debug)]
1418struct HighlightedRangeLine {
1419 start_x: f32,
1420 end_x: f32,
1421}
1422
1423impl HighlightedRange {
1424 fn paint(&self, bounds: RectF, scene: &mut Scene) {
1425 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
1426 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
1427 self.paint_lines(
1428 self.start_y + self.line_height,
1429 &self.lines[1..],
1430 bounds,
1431 scene,
1432 );
1433 } else {
1434 self.paint_lines(self.start_y, &self.lines, bounds, scene);
1435 }
1436 }
1437
1438 fn paint_lines(
1439 &self,
1440 start_y: f32,
1441 lines: &[HighlightedRangeLine],
1442 bounds: RectF,
1443 scene: &mut Scene,
1444 ) {
1445 if lines.is_empty() {
1446 return;
1447 }
1448
1449 let mut path = PathBuilder::new();
1450 let first_line = lines.first().unwrap();
1451 let last_line = lines.last().unwrap();
1452
1453 let first_top_left = vec2f(first_line.start_x, start_y);
1454 let first_top_right = vec2f(first_line.end_x, start_y);
1455
1456 let curve_height = vec2f(0., self.corner_radius);
1457 let curve_width = |start_x: f32, end_x: f32| {
1458 let max = (end_x - start_x) / 2.;
1459 let width = if max < self.corner_radius {
1460 max
1461 } else {
1462 self.corner_radius
1463 };
1464
1465 vec2f(width, 0.)
1466 };
1467
1468 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
1469 path.reset(first_top_right - top_curve_width);
1470 path.curve_to(first_top_right + curve_height, first_top_right);
1471
1472 let mut iter = lines.iter().enumerate().peekable();
1473 while let Some((ix, line)) = iter.next() {
1474 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
1475
1476 if let Some((_, next_line)) = iter.peek() {
1477 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
1478
1479 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
1480 Ordering::Equal => {
1481 path.line_to(bottom_right);
1482 }
1483 Ordering::Less => {
1484 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
1485 path.line_to(bottom_right - curve_height);
1486 if self.corner_radius > 0. {
1487 path.curve_to(bottom_right - curve_width, bottom_right);
1488 }
1489 path.line_to(next_top_right + curve_width);
1490 if self.corner_radius > 0. {
1491 path.curve_to(next_top_right + curve_height, next_top_right);
1492 }
1493 }
1494 Ordering::Greater => {
1495 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
1496 path.line_to(bottom_right - curve_height);
1497 if self.corner_radius > 0. {
1498 path.curve_to(bottom_right + curve_width, bottom_right);
1499 }
1500 path.line_to(next_top_right - curve_width);
1501 if self.corner_radius > 0. {
1502 path.curve_to(next_top_right + curve_height, next_top_right);
1503 }
1504 }
1505 }
1506 } else {
1507 let curve_width = curve_width(line.start_x, line.end_x);
1508 path.line_to(bottom_right - curve_height);
1509 if self.corner_radius > 0. {
1510 path.curve_to(bottom_right - curve_width, bottom_right);
1511 }
1512
1513 let bottom_left = vec2f(line.start_x, bottom_right.y());
1514 path.line_to(bottom_left + curve_width);
1515 if self.corner_radius > 0. {
1516 path.curve_to(bottom_left - curve_height, bottom_left);
1517 }
1518 }
1519 }
1520
1521 if first_line.start_x > last_line.start_x {
1522 let curve_width = curve_width(last_line.start_x, first_line.start_x);
1523 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
1524 path.line_to(second_top_left + curve_height);
1525 if self.corner_radius > 0. {
1526 path.curve_to(second_top_left + curve_width, second_top_left);
1527 }
1528 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
1529 path.line_to(first_bottom_left - curve_width);
1530 if self.corner_radius > 0. {
1531 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
1532 }
1533 }
1534
1535 path.line_to(first_top_left + curve_height);
1536 if self.corner_radius > 0. {
1537 path.curve_to(first_top_left + top_curve_width, first_top_left);
1538 }
1539 path.line_to(first_top_right - top_curve_width);
1540
1541 scene.push_path(path.build(self.color, Some(bounds)));
1542 }
1543}
1544
1545fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
1546 delta.powf(1.5) / 100.0
1547}
1548
1549fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
1550 delta.powf(1.2) / 300.0
1551}
1552
1553#[cfg(test)]
1554mod tests {
1555 use std::sync::Arc;
1556
1557 use super::*;
1558 use crate::{
1559 display_map::{BlockDisposition, BlockProperties},
1560 Editor, MultiBuffer,
1561 };
1562 use settings::Settings;
1563 use util::test::sample_text;
1564
1565 #[gpui::test]
1566 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
1567 cx.set_global(Settings::test(cx));
1568 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
1569 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
1570 Editor::new(EditorMode::Full, buffer, None, None, None, cx)
1571 });
1572 let element = EditorElement::new(
1573 editor.downgrade(),
1574 editor.read(cx).style(cx),
1575 CursorShape::Bar,
1576 );
1577
1578 let layouts = editor.update(cx, |editor, cx| {
1579 let snapshot = editor.snapshot(cx);
1580 let mut presenter = cx.build_presenter(window_id, 30.);
1581 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
1582 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &mut layout_cx)
1583 });
1584 assert_eq!(layouts.len(), 6);
1585 }
1586
1587 #[gpui::test]
1588 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
1589 cx.set_global(Settings::test(cx));
1590 let buffer = MultiBuffer::build_simple("", cx);
1591 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
1592 Editor::new(EditorMode::Full, buffer, None, None, None, cx)
1593 });
1594
1595 editor.update(cx, |editor, cx| {
1596 editor.set_placeholder_text("hello", cx);
1597 editor.insert_blocks(
1598 [BlockProperties {
1599 disposition: BlockDisposition::Above,
1600 height: 3,
1601 position: Anchor::min(),
1602 render: Arc::new(|_| Empty::new().boxed()),
1603 }],
1604 cx,
1605 );
1606
1607 // Blur the editor so that it displays placeholder text.
1608 cx.blur();
1609 });
1610
1611 let mut element = EditorElement::new(
1612 editor.downgrade(),
1613 editor.read(cx).style(cx),
1614 CursorShape::Bar,
1615 );
1616
1617 let mut scene = Scene::new(1.0);
1618 let mut presenter = cx.build_presenter(window_id, 30.);
1619 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
1620 let (size, mut state) = element.layout(
1621 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
1622 &mut layout_cx,
1623 );
1624
1625 assert_eq!(state.line_layouts.len(), 4);
1626 assert_eq!(
1627 state
1628 .line_number_layouts
1629 .iter()
1630 .map(Option::is_some)
1631 .collect::<Vec<_>>(),
1632 &[false, false, false, true]
1633 );
1634
1635 // Don't panic.
1636 let bounds = RectF::new(Default::default(), size);
1637 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
1638 element.paint(bounds, bounds, &mut state, &mut paint_cx);
1639 }
1640}