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, Hover,
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::{Not, 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: overshoot.column(),
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: overshoot.column(),
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 if let Some((position, hover_popover)) = layout.hover.as_mut() {
512 if position.row() >= start_row {
513 if let Some(cursor_row_layout) = &layout
514 .line_layouts
515 .get((position.row() - start_row) as usize)
516 {
517 cx.scene.push_stacking_context(None);
518
519 let x = cursor_row_layout.x_for_index(position.column() as usize) - scroll_left;
520 let y = (position.row() + 1) as f32 * layout.line_height - scroll_top;
521 let mut popover_origin = content_origin + vec2f(x, y);
522 let popover_height = hover_popover.size().y();
523
524 if popover_origin.y() + popover_height > bounds.lower_left().y() {
525 popover_origin
526 .set_y(popover_origin.y() - layout.line_height - popover_height);
527 }
528
529 hover_popover.paint(
530 popover_origin,
531 RectF::from_points(Vector2F::zero(), vec2f(f32::MAX, f32::MAX)), // Let content bleed outside of editor
532 cx,
533 );
534
535 cx.scene.pop_stacking_context();
536 }
537 }
538 }
539
540 cx.scene.pop_layer();
541 }
542
543 fn paint_highlighted_range(
544 &self,
545 range: Range<DisplayPoint>,
546 start_row: u32,
547 end_row: u32,
548 color: Color,
549 corner_radius: f32,
550 line_end_overshoot: f32,
551 layout: &LayoutState,
552 content_origin: Vector2F,
553 scroll_top: f32,
554 scroll_left: f32,
555 bounds: RectF,
556 cx: &mut PaintContext,
557 ) {
558 if range.start != range.end {
559 let row_range = if range.end.column() == 0 {
560 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
561 } else {
562 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
563 };
564
565 let highlighted_range = HighlightedRange {
566 color,
567 line_height: layout.line_height,
568 corner_radius,
569 start_y: content_origin.y() + row_range.start as f32 * layout.line_height
570 - scroll_top,
571 lines: row_range
572 .into_iter()
573 .map(|row| {
574 let line_layout = &layout.line_layouts[(row - start_row) as usize];
575 HighlightedRangeLine {
576 start_x: if row == range.start.row() {
577 content_origin.x()
578 + line_layout.x_for_index(range.start.column() as usize)
579 - scroll_left
580 } else {
581 content_origin.x() - scroll_left
582 },
583 end_x: if row == range.end.row() {
584 content_origin.x()
585 + line_layout.x_for_index(range.end.column() as usize)
586 - scroll_left
587 } else {
588 content_origin.x() + line_layout.width() + line_end_overshoot
589 - scroll_left
590 },
591 }
592 })
593 .collect(),
594 };
595
596 highlighted_range.paint(bounds, cx.scene);
597 }
598 }
599
600 fn paint_blocks(
601 &mut self,
602 bounds: RectF,
603 visible_bounds: RectF,
604 layout: &mut LayoutState,
605 cx: &mut PaintContext,
606 ) {
607 let scroll_position = layout.snapshot.scroll_position();
608 let scroll_left = scroll_position.x() * layout.em_width;
609 let scroll_top = scroll_position.y() * layout.line_height;
610
611 for (row, element) in &mut layout.blocks {
612 let origin = bounds.origin()
613 + vec2f(-scroll_left, *row as f32 * layout.line_height - scroll_top);
614 element.paint(origin, visible_bounds, cx);
615 }
616 }
617
618 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &LayoutContext) -> f32 {
619 let digit_count = (snapshot.max_buffer_row() as f32).log10().floor() as usize + 1;
620 let style = &self.style;
621
622 cx.text_layout_cache
623 .layout_str(
624 "1".repeat(digit_count).as_str(),
625 style.text.font_size,
626 &[(
627 digit_count,
628 RunStyle {
629 font_id: style.text.font_id,
630 color: Color::black(),
631 underline: Default::default(),
632 },
633 )],
634 )
635 .width()
636 }
637
638 fn layout_line_numbers(
639 &self,
640 rows: Range<u32>,
641 active_rows: &BTreeMap<u32, bool>,
642 snapshot: &EditorSnapshot,
643 cx: &LayoutContext,
644 ) -> Vec<Option<text_layout::Line>> {
645 let style = &self.style;
646 let include_line_numbers = snapshot.mode == EditorMode::Full;
647 let mut line_number_layouts = Vec::with_capacity(rows.len());
648 let mut line_number = String::new();
649 for (ix, row) in snapshot
650 .buffer_rows(rows.start)
651 .take((rows.end - rows.start) as usize)
652 .enumerate()
653 {
654 let display_row = rows.start + ix as u32;
655 let color = if active_rows.contains_key(&display_row) {
656 style.line_number_active
657 } else {
658 style.line_number
659 };
660 if let Some(buffer_row) = row {
661 if include_line_numbers {
662 line_number.clear();
663 write!(&mut line_number, "{}", buffer_row + 1).unwrap();
664 line_number_layouts.push(Some(cx.text_layout_cache.layout_str(
665 &line_number,
666 style.text.font_size,
667 &[(
668 line_number.len(),
669 RunStyle {
670 font_id: style.text.font_id,
671 color,
672 underline: Default::default(),
673 },
674 )],
675 )));
676 }
677 } else {
678 line_number_layouts.push(None);
679 }
680 }
681
682 line_number_layouts
683 }
684
685 fn layout_lines(
686 &mut self,
687 rows: Range<u32>,
688 snapshot: &EditorSnapshot,
689 cx: &LayoutContext,
690 ) -> Vec<text_layout::Line> {
691 if rows.start >= rows.end {
692 return Vec::new();
693 }
694
695 // When the editor is empty and unfocused, then show the placeholder.
696 if snapshot.is_empty() && !snapshot.is_focused() {
697 let placeholder_style = self
698 .style
699 .placeholder_text
700 .as_ref()
701 .unwrap_or_else(|| &self.style.text);
702 let placeholder_text = snapshot.placeholder_text();
703 let placeholder_lines = placeholder_text
704 .as_ref()
705 .map_or("", AsRef::as_ref)
706 .split('\n')
707 .skip(rows.start as usize)
708 .chain(iter::repeat(""))
709 .take(rows.len());
710 return placeholder_lines
711 .map(|line| {
712 cx.text_layout_cache.layout_str(
713 line,
714 placeholder_style.font_size,
715 &[(
716 line.len(),
717 RunStyle {
718 font_id: placeholder_style.font_id,
719 color: placeholder_style.color,
720 underline: Default::default(),
721 },
722 )],
723 )
724 })
725 .collect();
726 } else {
727 let style = &self.style;
728 let chunks = snapshot.chunks(rows.clone(), true).map(|chunk| {
729 let mut highlight_style = chunk
730 .syntax_highlight_id
731 .and_then(|id| id.style(&style.syntax));
732
733 if let Some(chunk_highlight) = chunk.highlight_style {
734 if let Some(highlight_style) = highlight_style.as_mut() {
735 highlight_style.highlight(chunk_highlight);
736 } else {
737 highlight_style = Some(chunk_highlight);
738 }
739 }
740
741 let mut diagnostic_highlight = HighlightStyle::default();
742
743 if chunk.is_unnecessary {
744 diagnostic_highlight.fade_out = Some(style.unnecessary_code_fade);
745 }
746
747 if let Some(severity) = chunk.diagnostic_severity {
748 // Omit underlines for HINT/INFO diagnostics on 'unnecessary' code.
749 if severity <= DiagnosticSeverity::WARNING || !chunk.is_unnecessary {
750 let diagnostic_style = super::diagnostic_style(severity, true, style);
751 diagnostic_highlight.underline = Some(Underline {
752 color: Some(diagnostic_style.message.text.color),
753 thickness: 1.0.into(),
754 squiggly: true,
755 });
756 }
757 }
758
759 if let Some(highlight_style) = highlight_style.as_mut() {
760 highlight_style.highlight(diagnostic_highlight);
761 } else {
762 highlight_style = Some(diagnostic_highlight);
763 }
764
765 (chunk.text, highlight_style)
766 });
767 layout_highlighted_chunks(
768 chunks,
769 &style.text,
770 &cx.text_layout_cache,
771 &cx.font_cache,
772 MAX_LINE_LEN,
773 rows.len() as usize,
774 )
775 }
776 }
777
778 fn layout_blocks(
779 &mut self,
780 rows: Range<u32>,
781 snapshot: &EditorSnapshot,
782 width: f32,
783 gutter_padding: f32,
784 gutter_width: f32,
785 em_width: f32,
786 text_x: f32,
787 line_height: f32,
788 style: &EditorStyle,
789 line_layouts: &[text_layout::Line],
790 cx: &mut LayoutContext,
791 ) -> Vec<(u32, ElementBox)> {
792 let editor = if let Some(editor) = self.view.upgrade(cx) {
793 editor
794 } else {
795 return Default::default();
796 };
797
798 let scroll_x = snapshot.scroll_position.x();
799 snapshot
800 .blocks_in_range(rows.clone())
801 .map(|(block_row, block)| {
802 let mut element = match block {
803 TransformBlock::Custom(block) => {
804 let align_to = block
805 .position()
806 .to_point(&snapshot.buffer_snapshot)
807 .to_display_point(snapshot);
808 let anchor_x = text_x
809 + if rows.contains(&align_to.row()) {
810 line_layouts[(align_to.row() - rows.start) as usize]
811 .x_for_index(align_to.column() as usize)
812 } else {
813 layout_line(align_to.row(), snapshot, style, cx.text_layout_cache)
814 .x_for_index(align_to.column() as usize)
815 };
816
817 cx.render(&editor, |_, cx| {
818 block.render(&mut BlockContext {
819 cx,
820 anchor_x,
821 gutter_padding,
822 line_height,
823 scroll_x,
824 gutter_width,
825 em_width,
826 })
827 })
828 }
829 TransformBlock::ExcerptHeader {
830 buffer,
831 starts_new_buffer,
832 ..
833 } => {
834 if *starts_new_buffer {
835 let style = &self.style.diagnostic_path_header;
836 let font_size =
837 (style.text_scale_factor * self.style.text.font_size).round();
838
839 let mut filename = None;
840 let mut parent_path = None;
841 if let Some(path) = buffer.path() {
842 filename =
843 path.file_name().map(|f| f.to_string_lossy().to_string());
844 parent_path =
845 path.parent().map(|p| p.to_string_lossy().to_string() + "/");
846 }
847
848 Flex::row()
849 .with_child(
850 Label::new(
851 filename.unwrap_or_else(|| "untitled".to_string()),
852 style.filename.text.clone().with_font_size(font_size),
853 )
854 .contained()
855 .with_style(style.filename.container)
856 .boxed(),
857 )
858 .with_children(parent_path.map(|path| {
859 Label::new(
860 path,
861 style.path.text.clone().with_font_size(font_size),
862 )
863 .contained()
864 .with_style(style.path.container)
865 .boxed()
866 }))
867 .aligned()
868 .left()
869 .contained()
870 .with_style(style.container)
871 .with_padding_left(gutter_padding + scroll_x * em_width)
872 .expanded()
873 .named("path header block")
874 } else {
875 let text_style = self.style.text.clone();
876 Label::new("…".to_string(), text_style)
877 .contained()
878 .with_padding_left(gutter_padding + scroll_x * em_width)
879 .named("collapsed context")
880 }
881 }
882 };
883
884 element.layout(
885 SizeConstraint {
886 min: Vector2F::zero(),
887 max: vec2f(width, block.height() as f32 * line_height),
888 },
889 cx,
890 );
891 (block_row, element)
892 })
893 .collect()
894 }
895}
896
897impl Element for EditorElement {
898 type LayoutState = LayoutState;
899 type PaintState = PaintState;
900
901 fn layout(
902 &mut self,
903 constraint: SizeConstraint,
904 cx: &mut LayoutContext,
905 ) -> (Vector2F, Self::LayoutState) {
906 let mut size = constraint.max;
907 if size.x().is_infinite() {
908 unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
909 }
910
911 let snapshot = self.snapshot(cx.app);
912 let style = self.style.clone();
913 let line_height = style.text.line_height(cx.font_cache);
914
915 let gutter_padding;
916 let gutter_width;
917 let gutter_margin;
918 if snapshot.mode == EditorMode::Full {
919 gutter_padding = style.text.em_width(cx.font_cache) * style.gutter_padding_factor;
920 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
921 gutter_margin = -style.text.descent(cx.font_cache);
922 } else {
923 gutter_padding = 0.0;
924 gutter_width = 0.0;
925 gutter_margin = 0.0;
926 };
927
928 let text_width = size.x() - gutter_width;
929 let em_width = style.text.em_width(cx.font_cache);
930 let em_advance = style.text.em_advance(cx.font_cache);
931 let overscroll = vec2f(em_width, 0.);
932 let snapshot = self.update_view(cx.app, |view, cx| {
933 let wrap_width = match view.soft_wrap_mode(cx) {
934 SoftWrap::None => Some((MAX_LINE_LEN / 2) as f32 * em_advance),
935 SoftWrap::EditorWidth => {
936 Some(text_width - gutter_margin - overscroll.x() - em_width)
937 }
938 SoftWrap::Column(column) => Some(column as f32 * em_advance),
939 };
940
941 if view.set_wrap_width(wrap_width, cx) {
942 view.snapshot(cx)
943 } else {
944 snapshot
945 }
946 });
947
948 let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
949 if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
950 size.set_y(
951 scroll_height
952 .min(constraint.max_along(Axis::Vertical))
953 .max(constraint.min_along(Axis::Vertical))
954 .min(line_height * max_lines as f32),
955 )
956 } else if let EditorMode::SingleLine = snapshot.mode {
957 size.set_y(
958 line_height
959 .min(constraint.max_along(Axis::Vertical))
960 .max(constraint.min_along(Axis::Vertical)),
961 )
962 } else if size.y().is_infinite() {
963 size.set_y(scroll_height);
964 }
965 let gutter_size = vec2f(gutter_width, size.y());
966 let text_size = vec2f(text_width, size.y());
967
968 let (autoscroll_horizontally, mut snapshot) = self.update_view(cx.app, |view, cx| {
969 let autoscroll_horizontally = view.autoscroll_vertically(size.y(), line_height, cx);
970 let snapshot = view.snapshot(cx);
971 (autoscroll_horizontally, snapshot)
972 });
973
974 let scroll_position = snapshot.scroll_position();
975 let start_row = scroll_position.y() as u32;
976 let scroll_top = scroll_position.y() * line_height;
977
978 // Add 1 to ensure selections bleed off screen
979 let end_row = 1 + cmp::min(
980 ((scroll_top + size.y()) / line_height).ceil() as u32,
981 snapshot.max_point().row(),
982 );
983
984 let start_anchor = if start_row == 0 {
985 Anchor::min()
986 } else {
987 snapshot
988 .buffer_snapshot
989 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
990 };
991 let end_anchor = if end_row > snapshot.max_point().row() {
992 Anchor::max()
993 } else {
994 snapshot
995 .buffer_snapshot
996 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
997 };
998
999 let mut selections: Vec<(ReplicaId, Vec<SelectionLayout>)> = Vec::new();
1000 let mut active_rows = BTreeMap::new();
1001 let mut highlighted_rows = None;
1002 let mut highlighted_ranges = Vec::new();
1003 self.update_view(cx.app, |view, cx| {
1004 let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
1005
1006 highlighted_rows = view.highlighted_rows();
1007 let theme = cx.global::<Settings>().theme.as_ref();
1008 highlighted_ranges = view.background_highlights_in_range(
1009 start_anchor.clone()..end_anchor.clone(),
1010 &display_map,
1011 theme,
1012 );
1013
1014 let mut remote_selections = HashMap::default();
1015 for (replica_id, line_mode, selection) in display_map
1016 .buffer_snapshot
1017 .remote_selections_in_range(&(start_anchor.clone()..end_anchor.clone()))
1018 {
1019 // The local selections match the leader's selections.
1020 if Some(replica_id) == view.leader_replica_id {
1021 continue;
1022 }
1023 remote_selections
1024 .entry(replica_id)
1025 .or_insert(Vec::new())
1026 .push(SelectionLayout::new(selection, line_mode, &display_map));
1027 }
1028 selections.extend(remote_selections);
1029
1030 if view.show_local_selections {
1031 let mut local_selections = view
1032 .selections
1033 .disjoint_in_range(start_anchor..end_anchor, cx);
1034 local_selections.extend(view.selections.pending(cx));
1035 for selection in &local_selections {
1036 let is_empty = selection.start == selection.end;
1037 let selection_start = snapshot.prev_line_boundary(selection.start).1;
1038 let selection_end = snapshot.next_line_boundary(selection.end).1;
1039 for row in cmp::max(selection_start.row(), start_row)
1040 ..=cmp::min(selection_end.row(), end_row)
1041 {
1042 let contains_non_empty_selection =
1043 active_rows.entry(row).or_insert(!is_empty);
1044 *contains_non_empty_selection |= !is_empty;
1045 }
1046 }
1047
1048 // Render the local selections in the leader's color when following.
1049 let local_replica_id = view.leader_replica_id.unwrap_or(view.replica_id(cx));
1050
1051 selections.push((
1052 local_replica_id,
1053 local_selections
1054 .into_iter()
1055 .map(|selection| {
1056 SelectionLayout::new(selection, view.selections.line_mode, &display_map)
1057 })
1058 .collect(),
1059 ));
1060 }
1061 });
1062
1063 let line_number_layouts =
1064 self.layout_line_numbers(start_row..end_row, &active_rows, &snapshot, cx);
1065
1066 let mut max_visible_line_width = 0.0;
1067 let line_layouts = self.layout_lines(start_row..end_row, &snapshot, cx);
1068 for line in &line_layouts {
1069 if line.width() > max_visible_line_width {
1070 max_visible_line_width = line.width();
1071 }
1072 }
1073
1074 let style = self.style.clone();
1075 let longest_line_width = layout_line(
1076 snapshot.longest_row(),
1077 &snapshot,
1078 &style,
1079 cx.text_layout_cache,
1080 )
1081 .width();
1082 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x();
1083 let em_width = style.text.em_width(cx.font_cache);
1084 let max_row = snapshot.max_point().row();
1085 let scroll_max = vec2f(
1086 ((scroll_width - text_size.x()) / em_width).max(0.0),
1087 max_row.saturating_sub(1) as f32,
1088 );
1089
1090 self.update_view(cx.app, |view, cx| {
1091 let clamped = view.clamp_scroll_left(scroll_max.x());
1092 let autoscrolled;
1093 if autoscroll_horizontally {
1094 autoscrolled = view.autoscroll_horizontally(
1095 start_row,
1096 text_size.x(),
1097 scroll_width,
1098 em_width,
1099 &line_layouts,
1100 cx,
1101 );
1102 } else {
1103 autoscrolled = false;
1104 }
1105
1106 if clamped || autoscrolled {
1107 snapshot = view.snapshot(cx);
1108 }
1109 });
1110
1111 let mut context_menu = None;
1112 let mut code_actions_indicator = None;
1113 let mut hover = None;
1114 cx.render(&self.view.upgrade(cx).unwrap(), |view, cx| {
1115 let newest_selection_head = view
1116 .selections
1117 .newest::<usize>(cx)
1118 .head()
1119 .to_display_point(&snapshot);
1120
1121 if (start_row..end_row).contains(&newest_selection_head.row()) {
1122 let style = view.style(cx);
1123 if view.context_menu_visible() {
1124 context_menu = view.render_context_menu(newest_selection_head, style.clone());
1125 }
1126
1127 code_actions_indicator = view
1128 .render_code_actions_indicator(&style, cx)
1129 .map(|indicator| (newest_selection_head.row(), indicator));
1130
1131 hover = view.render_hover_popover(style);
1132 }
1133 });
1134
1135 if let Some((_, context_menu)) = context_menu.as_mut() {
1136 context_menu.layout(
1137 SizeConstraint {
1138 min: Vector2F::zero(),
1139 max: vec2f(
1140 f32::INFINITY,
1141 (12. * line_height).min((size.y() - line_height) / 2.),
1142 ),
1143 },
1144 cx,
1145 );
1146 }
1147
1148 if let Some((_, indicator)) = code_actions_indicator.as_mut() {
1149 indicator.layout(
1150 SizeConstraint::strict_along(Axis::Vertical, line_height * 0.618),
1151 cx,
1152 );
1153 }
1154
1155 if let Some((_, hover)) = hover.as_mut() {
1156 hover.layout(
1157 SizeConstraint {
1158 min: Vector2F::zero(),
1159 max: vec2f(
1160 f32::INFINITY,
1161 (12. * line_height).min((size.y() - line_height) / 2.),
1162 ),
1163 },
1164 cx,
1165 );
1166 }
1167
1168 let blocks = self.layout_blocks(
1169 start_row..end_row,
1170 &snapshot,
1171 size.x().max(scroll_width + gutter_width),
1172 gutter_padding,
1173 gutter_width,
1174 em_width,
1175 gutter_width + gutter_margin,
1176 line_height,
1177 &style,
1178 &line_layouts,
1179 cx,
1180 );
1181
1182 (
1183 size,
1184 LayoutState {
1185 size,
1186 scroll_max,
1187 gutter_size,
1188 gutter_padding,
1189 text_size,
1190 gutter_margin,
1191 snapshot,
1192 active_rows,
1193 highlighted_rows,
1194 highlighted_ranges,
1195 line_layouts,
1196 line_number_layouts,
1197 blocks,
1198 line_height,
1199 em_width,
1200 em_advance,
1201 selections,
1202 context_menu,
1203 code_actions_indicator,
1204 hover,
1205 },
1206 )
1207 }
1208
1209 fn paint(
1210 &mut self,
1211 bounds: RectF,
1212 visible_bounds: RectF,
1213 layout: &mut Self::LayoutState,
1214 cx: &mut PaintContext,
1215 ) -> Self::PaintState {
1216 cx.scene.push_layer(Some(bounds));
1217
1218 let gutter_bounds = RectF::new(bounds.origin(), layout.gutter_size);
1219 let text_bounds = RectF::new(
1220 bounds.origin() + vec2f(layout.gutter_size.x(), 0.0),
1221 layout.text_size,
1222 );
1223
1224 self.paint_background(gutter_bounds, text_bounds, layout, cx);
1225 if layout.gutter_size.x() > 0. {
1226 self.paint_gutter(gutter_bounds, visible_bounds, layout, cx);
1227 }
1228 self.paint_text(text_bounds, visible_bounds, layout, cx);
1229
1230 if !layout.blocks.is_empty() {
1231 cx.scene.push_layer(Some(bounds));
1232 self.paint_blocks(bounds, visible_bounds, layout, cx);
1233 cx.scene.pop_layer();
1234 }
1235
1236 cx.scene.pop_layer();
1237
1238 PaintState {
1239 bounds,
1240 gutter_bounds,
1241 text_bounds,
1242 }
1243 }
1244
1245 fn dispatch_event(
1246 &mut self,
1247 event: &Event,
1248 _: RectF,
1249 _: RectF,
1250 layout: &mut LayoutState,
1251 paint: &mut PaintState,
1252 cx: &mut EventContext,
1253 ) -> bool {
1254 if let Some((_, context_menu)) = &mut layout.context_menu {
1255 if context_menu.dispatch_event(event, cx) {
1256 return true;
1257 }
1258 }
1259
1260 if let Some((_, indicator)) = &mut layout.code_actions_indicator {
1261 if indicator.dispatch_event(event, cx) {
1262 return true;
1263 }
1264 }
1265
1266 for (_, block) in &mut layout.blocks {
1267 if block.dispatch_event(event, cx) {
1268 return true;
1269 }
1270 }
1271
1272 match event {
1273 Event::LeftMouseDown {
1274 position,
1275 cmd,
1276 alt,
1277 shift,
1278 click_count,
1279 ..
1280 } => self.mouse_down(
1281 *position,
1282 *cmd,
1283 *alt,
1284 *shift,
1285 *click_count,
1286 layout,
1287 paint,
1288 cx,
1289 ),
1290 Event::LeftMouseUp { position, .. } => self.mouse_up(*position, cx),
1291 Event::LeftMouseDragged { position } => {
1292 self.mouse_dragged(*position, layout, paint, cx)
1293 }
1294 Event::ScrollWheel {
1295 position,
1296 delta,
1297 precise,
1298 } => self.scroll(*position, *delta, *precise, layout, paint, cx),
1299 Event::KeyDown { input, .. } => self.key_down(input.as_deref(), cx),
1300 Event::MouseMoved { position, .. } => {
1301 let point = if paint.text_bounds.contains_point(*position) {
1302 let (point, overshoot) =
1303 paint.point_for_position(&self.snapshot(cx), layout, *position);
1304 if overshoot.is_zero() {
1305 Some(point)
1306 } else {
1307 None
1308 }
1309 } else {
1310 None
1311 };
1312
1313 cx.dispatch_action(Hover { point });
1314 true
1315 }
1316 _ => false,
1317 }
1318 }
1319
1320 fn debug(
1321 &self,
1322 bounds: RectF,
1323 _: &Self::LayoutState,
1324 _: &Self::PaintState,
1325 _: &gpui::DebugContext,
1326 ) -> json::Value {
1327 json!({
1328 "type": "BufferElement",
1329 "bounds": bounds.to_json()
1330 })
1331 }
1332}
1333
1334pub struct LayoutState {
1335 size: Vector2F,
1336 scroll_max: Vector2F,
1337 gutter_size: Vector2F,
1338 gutter_padding: f32,
1339 gutter_margin: f32,
1340 text_size: Vector2F,
1341 snapshot: EditorSnapshot,
1342 active_rows: BTreeMap<u32, bool>,
1343 highlighted_rows: Option<Range<u32>>,
1344 line_layouts: Vec<text_layout::Line>,
1345 line_number_layouts: Vec<Option<text_layout::Line>>,
1346 blocks: Vec<(u32, ElementBox)>,
1347 line_height: f32,
1348 em_width: f32,
1349 em_advance: f32,
1350 highlighted_ranges: Vec<(Range<DisplayPoint>, Color)>,
1351 selections: Vec<(ReplicaId, Vec<SelectionLayout>)>,
1352 context_menu: Option<(DisplayPoint, ElementBox)>,
1353 code_actions_indicator: Option<(u32, ElementBox)>,
1354 hover: Option<(DisplayPoint, ElementBox)>,
1355}
1356
1357fn layout_line(
1358 row: u32,
1359 snapshot: &EditorSnapshot,
1360 style: &EditorStyle,
1361 layout_cache: &TextLayoutCache,
1362) -> text_layout::Line {
1363 let mut line = snapshot.line(row);
1364
1365 if line.len() > MAX_LINE_LEN {
1366 let mut len = MAX_LINE_LEN;
1367 while !line.is_char_boundary(len) {
1368 len -= 1;
1369 }
1370
1371 line.truncate(len);
1372 }
1373
1374 layout_cache.layout_str(
1375 &line,
1376 style.text.font_size,
1377 &[(
1378 snapshot.line_len(row) as usize,
1379 RunStyle {
1380 font_id: style.text.font_id,
1381 color: Color::black(),
1382 underline: Default::default(),
1383 },
1384 )],
1385 )
1386}
1387
1388pub struct PaintState {
1389 bounds: RectF,
1390 gutter_bounds: RectF,
1391 text_bounds: RectF,
1392}
1393
1394impl PaintState {
1395 /// Returns two display points. The first is the nearest valid
1396 /// position in the current buffer and the second is the distance to the
1397 /// nearest valid position if there was overshoot.
1398 fn point_for_position(
1399 &self,
1400 snapshot: &EditorSnapshot,
1401 layout: &LayoutState,
1402 position: Vector2F,
1403 ) -> (DisplayPoint, DisplayPoint) {
1404 let scroll_position = snapshot.scroll_position();
1405 let position = position - self.text_bounds.origin();
1406 let y = position.y().max(0.0).min(layout.size.y());
1407 let row = ((y / layout.line_height) + scroll_position.y()) as u32;
1408 let row_overshoot = row.saturating_sub(snapshot.max_point().row());
1409 let row = cmp::min(row, snapshot.max_point().row());
1410 let line = &layout.line_layouts[(row - scroll_position.y() as u32) as usize];
1411 let x = position.x() + (scroll_position.x() * layout.em_width);
1412
1413 let column = if x >= 0.0 {
1414 line.index_for_x(x)
1415 .map(|ix| ix as u32)
1416 .unwrap_or_else(|| snapshot.line_len(row))
1417 } else {
1418 0
1419 };
1420 let column_overshoot = (0f32.max(x - line.width()) / layout.em_advance) as u32;
1421
1422 (
1423 DisplayPoint::new(row, column),
1424 DisplayPoint::new(row_overshoot, column_overshoot),
1425 )
1426 }
1427}
1428
1429#[derive(Copy, Clone, PartialEq, Eq)]
1430pub enum CursorShape {
1431 Bar,
1432 Block,
1433 Underscore,
1434}
1435
1436impl Default for CursorShape {
1437 fn default() -> Self {
1438 CursorShape::Bar
1439 }
1440}
1441
1442struct Cursor {
1443 origin: Vector2F,
1444 block_width: f32,
1445 line_height: f32,
1446 color: Color,
1447 shape: CursorShape,
1448 block_text: Option<Line>,
1449}
1450
1451impl Cursor {
1452 fn paint(&self, cx: &mut PaintContext) {
1453 let bounds = match self.shape {
1454 CursorShape::Bar => RectF::new(self.origin, vec2f(2.0, self.line_height)),
1455 CursorShape::Block => {
1456 RectF::new(self.origin, vec2f(self.block_width, self.line_height))
1457 }
1458 CursorShape::Underscore => RectF::new(
1459 self.origin + Vector2F::new(0.0, self.line_height - 2.0),
1460 vec2f(self.block_width, 2.0),
1461 ),
1462 };
1463
1464 cx.scene.push_quad(Quad {
1465 bounds,
1466 background: Some(self.color),
1467 border: Border::new(0., Color::black()),
1468 corner_radius: 0.,
1469 });
1470
1471 if let Some(block_text) = &self.block_text {
1472 block_text.paint(self.origin, bounds, self.line_height, cx);
1473 }
1474 }
1475}
1476
1477#[derive(Debug)]
1478struct HighlightedRange {
1479 start_y: f32,
1480 line_height: f32,
1481 lines: Vec<HighlightedRangeLine>,
1482 color: Color,
1483 corner_radius: f32,
1484}
1485
1486#[derive(Debug)]
1487struct HighlightedRangeLine {
1488 start_x: f32,
1489 end_x: f32,
1490}
1491
1492impl HighlightedRange {
1493 fn paint(&self, bounds: RectF, scene: &mut Scene) {
1494 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
1495 self.paint_lines(self.start_y, &self.lines[0..1], bounds, scene);
1496 self.paint_lines(
1497 self.start_y + self.line_height,
1498 &self.lines[1..],
1499 bounds,
1500 scene,
1501 );
1502 } else {
1503 self.paint_lines(self.start_y, &self.lines, bounds, scene);
1504 }
1505 }
1506
1507 fn paint_lines(
1508 &self,
1509 start_y: f32,
1510 lines: &[HighlightedRangeLine],
1511 bounds: RectF,
1512 scene: &mut Scene,
1513 ) {
1514 if lines.is_empty() {
1515 return;
1516 }
1517
1518 let mut path = PathBuilder::new();
1519 let first_line = lines.first().unwrap();
1520 let last_line = lines.last().unwrap();
1521
1522 let first_top_left = vec2f(first_line.start_x, start_y);
1523 let first_top_right = vec2f(first_line.end_x, start_y);
1524
1525 let curve_height = vec2f(0., self.corner_radius);
1526 let curve_width = |start_x: f32, end_x: f32| {
1527 let max = (end_x - start_x) / 2.;
1528 let width = if max < self.corner_radius {
1529 max
1530 } else {
1531 self.corner_radius
1532 };
1533
1534 vec2f(width, 0.)
1535 };
1536
1537 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
1538 path.reset(first_top_right - top_curve_width);
1539 path.curve_to(first_top_right + curve_height, first_top_right);
1540
1541 let mut iter = lines.iter().enumerate().peekable();
1542 while let Some((ix, line)) = iter.next() {
1543 let bottom_right = vec2f(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
1544
1545 if let Some((_, next_line)) = iter.peek() {
1546 let next_top_right = vec2f(next_line.end_x, bottom_right.y());
1547
1548 match next_top_right.x().partial_cmp(&bottom_right.x()).unwrap() {
1549 Ordering::Equal => {
1550 path.line_to(bottom_right);
1551 }
1552 Ordering::Less => {
1553 let curve_width = curve_width(next_top_right.x(), bottom_right.x());
1554 path.line_to(bottom_right - curve_height);
1555 if self.corner_radius > 0. {
1556 path.curve_to(bottom_right - curve_width, bottom_right);
1557 }
1558 path.line_to(next_top_right + curve_width);
1559 if self.corner_radius > 0. {
1560 path.curve_to(next_top_right + curve_height, next_top_right);
1561 }
1562 }
1563 Ordering::Greater => {
1564 let curve_width = curve_width(bottom_right.x(), next_top_right.x());
1565 path.line_to(bottom_right - curve_height);
1566 if self.corner_radius > 0. {
1567 path.curve_to(bottom_right + curve_width, bottom_right);
1568 }
1569 path.line_to(next_top_right - curve_width);
1570 if self.corner_radius > 0. {
1571 path.curve_to(next_top_right + curve_height, next_top_right);
1572 }
1573 }
1574 }
1575 } else {
1576 let curve_width = curve_width(line.start_x, line.end_x);
1577 path.line_to(bottom_right - curve_height);
1578 if self.corner_radius > 0. {
1579 path.curve_to(bottom_right - curve_width, bottom_right);
1580 }
1581
1582 let bottom_left = vec2f(line.start_x, bottom_right.y());
1583 path.line_to(bottom_left + curve_width);
1584 if self.corner_radius > 0. {
1585 path.curve_to(bottom_left - curve_height, bottom_left);
1586 }
1587 }
1588 }
1589
1590 if first_line.start_x > last_line.start_x {
1591 let curve_width = curve_width(last_line.start_x, first_line.start_x);
1592 let second_top_left = vec2f(last_line.start_x, start_y + self.line_height);
1593 path.line_to(second_top_left + curve_height);
1594 if self.corner_radius > 0. {
1595 path.curve_to(second_top_left + curve_width, second_top_left);
1596 }
1597 let first_bottom_left = vec2f(first_line.start_x, second_top_left.y());
1598 path.line_to(first_bottom_left - curve_width);
1599 if self.corner_radius > 0. {
1600 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
1601 }
1602 }
1603
1604 path.line_to(first_top_left + curve_height);
1605 if self.corner_radius > 0. {
1606 path.curve_to(first_top_left + top_curve_width, first_top_left);
1607 }
1608 path.line_to(first_top_right - top_curve_width);
1609
1610 scene.push_path(path.build(self.color, Some(bounds)));
1611 }
1612}
1613
1614fn scale_vertical_mouse_autoscroll_delta(delta: f32) -> f32 {
1615 delta.powf(1.5) / 100.0
1616}
1617
1618fn scale_horizontal_mouse_autoscroll_delta(delta: f32) -> f32 {
1619 delta.powf(1.2) / 300.0
1620}
1621
1622#[cfg(test)]
1623mod tests {
1624 use std::sync::Arc;
1625
1626 use super::*;
1627 use crate::{
1628 display_map::{BlockDisposition, BlockProperties},
1629 Editor, MultiBuffer,
1630 };
1631 use settings::Settings;
1632 use util::test::sample_text;
1633
1634 #[gpui::test]
1635 fn test_layout_line_numbers(cx: &mut gpui::MutableAppContext) {
1636 cx.set_global(Settings::test(cx));
1637 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
1638 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
1639 Editor::new(EditorMode::Full, buffer, None, None, None, cx)
1640 });
1641 let element = EditorElement::new(
1642 editor.downgrade(),
1643 editor.read(cx).style(cx),
1644 CursorShape::Bar,
1645 );
1646
1647 let layouts = editor.update(cx, |editor, cx| {
1648 let snapshot = editor.snapshot(cx);
1649 let mut presenter = cx.build_presenter(window_id, 30.);
1650 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
1651 element.layout_line_numbers(0..6, &Default::default(), &snapshot, &mut layout_cx)
1652 });
1653 assert_eq!(layouts.len(), 6);
1654 }
1655
1656 #[gpui::test]
1657 fn test_layout_with_placeholder_text_and_blocks(cx: &mut gpui::MutableAppContext) {
1658 cx.set_global(Settings::test(cx));
1659 let buffer = MultiBuffer::build_simple("", cx);
1660 let (window_id, editor) = cx.add_window(Default::default(), |cx| {
1661 Editor::new(EditorMode::Full, buffer, None, None, None, cx)
1662 });
1663
1664 editor.update(cx, |editor, cx| {
1665 editor.set_placeholder_text("hello", cx);
1666 editor.insert_blocks(
1667 [BlockProperties {
1668 disposition: BlockDisposition::Above,
1669 height: 3,
1670 position: Anchor::min(),
1671 render: Arc::new(|_| Empty::new().boxed()),
1672 }],
1673 cx,
1674 );
1675
1676 // Blur the editor so that it displays placeholder text.
1677 cx.blur();
1678 });
1679
1680 let mut element = EditorElement::new(
1681 editor.downgrade(),
1682 editor.read(cx).style(cx),
1683 CursorShape::Bar,
1684 );
1685
1686 let mut scene = Scene::new(1.0);
1687 let mut presenter = cx.build_presenter(window_id, 30.);
1688 let mut layout_cx = presenter.build_layout_context(Vector2F::zero(), false, cx);
1689 let (size, mut state) = element.layout(
1690 SizeConstraint::new(vec2f(500., 500.), vec2f(500., 500.)),
1691 &mut layout_cx,
1692 );
1693
1694 assert_eq!(state.line_layouts.len(), 4);
1695 assert_eq!(
1696 state
1697 .line_number_layouts
1698 .iter()
1699 .map(Option::is_some)
1700 .collect::<Vec<_>>(),
1701 &[false, false, false, true]
1702 );
1703
1704 // Don't panic.
1705 let bounds = RectF::new(Default::default(), size);
1706 let mut paint_cx = presenter.build_paint_context(&mut scene, bounds.size(), cx);
1707 element.paint(bounds, bounds, &mut state, &mut paint_cx);
1708 }
1709}