1use crate::{
2 display_map::{
3 BlockContext, BlockStyle, DisplaySnapshot, FoldStatus, HighlightedChunk, ToDisplayPoint,
4 TransformBlock,
5 },
6 editor_settings::ShowScrollbar,
7 git::{diff_hunk_to_display, DisplayDiffHunk},
8 hover_popover::{
9 self, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 items::BufferSearchHighlights,
12 link_go_to_definition::{
13 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
14 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
15 LinkGoToDefinitionState,
16 },
17 mouse_context_menu,
18 scroll::scroll_amount::ScrollAmount,
19 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
20 HalfPageDown, HalfPageUp, HoveredCursor, LineDown, LineUp, OpenExcerpts, PageDown, PageUp,
21 Point, SelectPhase, Selection, SoftWrap, ToPoint, CURSORS_VISIBLE_FOR, MAX_LINE_LEN,
22};
23use anyhow::Result;
24use collections::{BTreeMap, HashMap};
25use git::diff::DiffHunkStatus;
26use gpui::{
27 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
28 AnchorCorner, AnyElement, AvailableSpace, Bounds, ContentMask, Corners, CursorStyle,
29 DispatchPhase, Edges, Element, ElementInputHandler, Entity, Hsla, InteractiveBounds,
30 InteractiveElement, IntoElement, ModifiersChangedEvent, MouseButton, MouseDownEvent,
31 MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, ScrollDelta, ScrollWheelEvent, ShapedLine,
32 SharedString, Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun,
33 TextStyle, View, ViewContext, WindowContext,
34};
35use itertools::Itertools;
36use language::language_settings::ShowWhitespaceSetting;
37use multi_buffer::Anchor;
38use project::{
39 project_settings::{GitGutterSetting, ProjectSettings},
40 ProjectPath,
41};
42use settings::Settings;
43use smallvec::SmallVec;
44use std::{
45 any::TypeId,
46 borrow::Cow,
47 cmp::{self, Ordering},
48 fmt::Write,
49 iter,
50 ops::Range,
51 sync::Arc,
52};
53use sum_tree::Bias;
54use theme::{ActiveTheme, PlayerColor};
55use ui::prelude::*;
56use ui::{h_flex, ButtonLike, ButtonStyle, IconButton, Tooltip};
57use util::ResultExt;
58use workspace::item::Item;
59
60struct SelectionLayout {
61 head: DisplayPoint,
62 cursor_shape: CursorShape,
63 is_newest: bool,
64 is_local: bool,
65 range: Range<DisplayPoint>,
66 active_rows: Range<u32>,
67 user_name: Option<SharedString>,
68}
69
70impl SelectionLayout {
71 fn new<T: ToPoint + ToDisplayPoint + Clone>(
72 selection: Selection<T>,
73 line_mode: bool,
74 cursor_shape: CursorShape,
75 map: &DisplaySnapshot,
76 is_newest: bool,
77 is_local: bool,
78 user_name: Option<SharedString>,
79 ) -> Self {
80 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
81 let display_selection = point_selection.map(|p| p.to_display_point(map));
82 let mut range = display_selection.range();
83 let mut head = display_selection.head();
84 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
85 ..map.next_line_boundary(point_selection.end).1.row();
86
87 // vim visual line mode
88 if line_mode {
89 let point_range = map.expand_to_line(point_selection.range());
90 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
91 }
92
93 // any vim visual mode (including line mode)
94 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
95 if head.column() > 0 {
96 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
97 } else if head.row() > 0 && head != map.max_point() {
98 head = map.clip_point(
99 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
100 Bias::Left,
101 );
102 // updating range.end is a no-op unless you're cursor is
103 // on the newline containing a multi-buffer divider
104 // in which case the clip_point may have moved the head up
105 // an additional row.
106 range.end = DisplayPoint::new(head.row() + 1, 0);
107 active_rows.end = head.row();
108 }
109 }
110
111 Self {
112 head,
113 cursor_shape,
114 is_newest,
115 is_local,
116 range,
117 active_rows,
118 user_name,
119 }
120 }
121}
122
123pub struct EditorElement {
124 editor: View<Editor>,
125 style: EditorStyle,
126}
127
128impl EditorElement {
129 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
130 Self {
131 editor: editor.clone(),
132 style,
133 }
134 }
135
136 fn register_actions(&self, cx: &mut WindowContext) {
137 let view = &self.editor;
138 view.update(cx, |editor, cx| {
139 for action in editor.editor_actions.iter() {
140 (action)(cx)
141 }
142 });
143
144 crate::rust_analyzer_ext::apply_related_actions(view, cx);
145 register_action(view, cx, Editor::move_left);
146 register_action(view, cx, Editor::move_right);
147 register_action(view, cx, Editor::move_down);
148 register_action(view, cx, Editor::move_up);
149 register_action(view, cx, Editor::cancel);
150 register_action(view, cx, Editor::newline);
151 register_action(view, cx, Editor::newline_above);
152 register_action(view, cx, Editor::newline_below);
153 register_action(view, cx, Editor::backspace);
154 register_action(view, cx, Editor::delete);
155 register_action(view, cx, Editor::tab);
156 register_action(view, cx, Editor::tab_prev);
157 register_action(view, cx, Editor::indent);
158 register_action(view, cx, Editor::outdent);
159 register_action(view, cx, Editor::delete_line);
160 register_action(view, cx, Editor::join_lines);
161 register_action(view, cx, Editor::sort_lines_case_sensitive);
162 register_action(view, cx, Editor::sort_lines_case_insensitive);
163 register_action(view, cx, Editor::reverse_lines);
164 register_action(view, cx, Editor::shuffle_lines);
165 register_action(view, cx, Editor::convert_to_upper_case);
166 register_action(view, cx, Editor::convert_to_lower_case);
167 register_action(view, cx, Editor::convert_to_title_case);
168 register_action(view, cx, Editor::convert_to_snake_case);
169 register_action(view, cx, Editor::convert_to_kebab_case);
170 register_action(view, cx, Editor::convert_to_upper_camel_case);
171 register_action(view, cx, Editor::convert_to_lower_camel_case);
172 register_action(view, cx, Editor::delete_to_previous_word_start);
173 register_action(view, cx, Editor::delete_to_previous_subword_start);
174 register_action(view, cx, Editor::delete_to_next_word_end);
175 register_action(view, cx, Editor::delete_to_next_subword_end);
176 register_action(view, cx, Editor::delete_to_beginning_of_line);
177 register_action(view, cx, Editor::delete_to_end_of_line);
178 register_action(view, cx, Editor::cut_to_end_of_line);
179 register_action(view, cx, Editor::duplicate_line);
180 register_action(view, cx, Editor::move_line_up);
181 register_action(view, cx, Editor::move_line_down);
182 register_action(view, cx, Editor::transpose);
183 register_action(view, cx, Editor::cut);
184 register_action(view, cx, Editor::copy);
185 register_action(view, cx, Editor::paste);
186 register_action(view, cx, Editor::undo);
187 register_action(view, cx, Editor::redo);
188 register_action(view, cx, Editor::move_page_up);
189 register_action(view, cx, Editor::move_page_down);
190 register_action(view, cx, Editor::next_screen);
191 register_action(view, cx, Editor::scroll_cursor_top);
192 register_action(view, cx, Editor::scroll_cursor_center);
193 register_action(view, cx, Editor::scroll_cursor_bottom);
194 register_action(view, cx, |editor, _: &LineDown, cx| {
195 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
196 });
197 register_action(view, cx, |editor, _: &LineUp, cx| {
198 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
199 });
200 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
201 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
202 });
203 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
204 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
205 });
206 register_action(view, cx, |editor, _: &PageDown, cx| {
207 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
208 });
209 register_action(view, cx, |editor, _: &PageUp, cx| {
210 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
211 });
212 register_action(view, cx, Editor::move_to_previous_word_start);
213 register_action(view, cx, Editor::move_to_previous_subword_start);
214 register_action(view, cx, Editor::move_to_next_word_end);
215 register_action(view, cx, Editor::move_to_next_subword_end);
216 register_action(view, cx, Editor::move_to_beginning_of_line);
217 register_action(view, cx, Editor::move_to_end_of_line);
218 register_action(view, cx, Editor::move_to_start_of_paragraph);
219 register_action(view, cx, Editor::move_to_end_of_paragraph);
220 register_action(view, cx, Editor::move_to_beginning);
221 register_action(view, cx, Editor::move_to_end);
222 register_action(view, cx, Editor::select_up);
223 register_action(view, cx, Editor::select_down);
224 register_action(view, cx, Editor::select_left);
225 register_action(view, cx, Editor::select_right);
226 register_action(view, cx, Editor::select_to_previous_word_start);
227 register_action(view, cx, Editor::select_to_previous_subword_start);
228 register_action(view, cx, Editor::select_to_next_word_end);
229 register_action(view, cx, Editor::select_to_next_subword_end);
230 register_action(view, cx, Editor::select_to_beginning_of_line);
231 register_action(view, cx, Editor::select_to_end_of_line);
232 register_action(view, cx, Editor::select_to_start_of_paragraph);
233 register_action(view, cx, Editor::select_to_end_of_paragraph);
234 register_action(view, cx, Editor::select_to_beginning);
235 register_action(view, cx, Editor::select_to_end);
236 register_action(view, cx, Editor::select_all);
237 register_action(view, cx, |editor, action, cx| {
238 editor.select_all_matches(action, cx).log_err();
239 });
240 register_action(view, cx, Editor::select_line);
241 register_action(view, cx, Editor::split_selection_into_lines);
242 register_action(view, cx, Editor::add_selection_above);
243 register_action(view, cx, Editor::add_selection_below);
244 register_action(view, cx, |editor, action, cx| {
245 editor.select_next(action, cx).log_err();
246 });
247 register_action(view, cx, |editor, action, cx| {
248 editor.select_previous(action, cx).log_err();
249 });
250 register_action(view, cx, Editor::toggle_comments);
251 register_action(view, cx, Editor::select_larger_syntax_node);
252 register_action(view, cx, Editor::select_smaller_syntax_node);
253 register_action(view, cx, Editor::move_to_enclosing_bracket);
254 register_action(view, cx, Editor::undo_selection);
255 register_action(view, cx, Editor::redo_selection);
256 register_action(view, cx, Editor::go_to_diagnostic);
257 register_action(view, cx, Editor::go_to_prev_diagnostic);
258 register_action(view, cx, Editor::go_to_hunk);
259 register_action(view, cx, Editor::go_to_prev_hunk);
260 register_action(view, cx, Editor::go_to_definition);
261 register_action(view, cx, Editor::go_to_definition_split);
262 register_action(view, cx, Editor::go_to_type_definition);
263 register_action(view, cx, Editor::go_to_type_definition_split);
264 register_action(view, cx, Editor::fold);
265 register_action(view, cx, Editor::fold_at);
266 register_action(view, cx, Editor::unfold_lines);
267 register_action(view, cx, Editor::unfold_at);
268 register_action(view, cx, Editor::fold_selected_ranges);
269 register_action(view, cx, Editor::show_completions);
270 register_action(view, cx, Editor::toggle_code_actions);
271 register_action(view, cx, Editor::open_excerpts);
272 register_action(view, cx, Editor::toggle_soft_wrap);
273 register_action(view, cx, Editor::toggle_inlay_hints);
274 register_action(view, cx, hover_popover::hover);
275 register_action(view, cx, Editor::reveal_in_finder);
276 register_action(view, cx, Editor::copy_path);
277 register_action(view, cx, Editor::copy_relative_path);
278 register_action(view, cx, Editor::copy_highlight_json);
279 register_action(view, cx, |editor, action, cx| {
280 if let Some(task) = editor.format(action, cx) {
281 task.detach_and_log_err(cx);
282 } else {
283 cx.propagate();
284 }
285 });
286 register_action(view, cx, Editor::restart_language_server);
287 register_action(view, cx, Editor::show_character_palette);
288 register_action(view, cx, |editor, action, cx| {
289 if let Some(task) = editor.confirm_completion(action, cx) {
290 task.detach_and_log_err(cx);
291 } else {
292 cx.propagate();
293 }
294 });
295 register_action(view, cx, |editor, action, cx| {
296 if let Some(task) = editor.confirm_code_action(action, cx) {
297 task.detach_and_log_err(cx);
298 } else {
299 cx.propagate();
300 }
301 });
302 register_action(view, cx, |editor, action, cx| {
303 if let Some(task) = editor.rename(action, cx) {
304 task.detach_and_log_err(cx);
305 } else {
306 cx.propagate();
307 }
308 });
309 register_action(view, cx, |editor, action, cx| {
310 if let Some(task) = editor.confirm_rename(action, cx) {
311 task.detach_and_log_err(cx);
312 } else {
313 cx.propagate();
314 }
315 });
316 register_action(view, cx, |editor, action, cx| {
317 if let Some(task) = editor.find_all_references(action, cx) {
318 task.detach_and_log_err(cx);
319 } else {
320 cx.propagate();
321 }
322 });
323 register_action(view, cx, Editor::next_copilot_suggestion);
324 register_action(view, cx, Editor::previous_copilot_suggestion);
325 register_action(view, cx, Editor::copilot_suggest);
326 register_action(view, cx, Editor::context_menu_first);
327 register_action(view, cx, Editor::context_menu_prev);
328 register_action(view, cx, Editor::context_menu_next);
329 register_action(view, cx, Editor::context_menu_last);
330 register_action(view, cx, Editor::display_cursor_names);
331 }
332
333 fn register_key_listeners(&self, cx: &mut ElementContext) {
334 cx.on_key_event({
335 let editor = self.editor.clone();
336 move |event: &ModifiersChangedEvent, phase, cx| {
337 if phase != DispatchPhase::Bubble {
338 return;
339 }
340
341 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
342 cx.stop_propagation();
343 }
344 }
345 });
346 }
347
348 pub(crate) fn modifiers_changed(
349 editor: &mut Editor,
350 event: &ModifiersChangedEvent,
351 cx: &mut ViewContext<Editor>,
352 ) -> bool {
353 let pending_selection = editor.has_pending_selection();
354
355 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
356 if event.command && !pending_selection {
357 let point = point.clone();
358 let snapshot = editor.snapshot(cx);
359 let kind = point.definition_kind(event.shift);
360
361 show_link_definition(kind, editor, point, snapshot, cx);
362 return false;
363 }
364 }
365
366 {
367 if editor.link_go_to_definition_state.symbol_range.is_some()
368 || !editor.link_go_to_definition_state.definitions.is_empty()
369 {
370 editor.link_go_to_definition_state.symbol_range.take();
371 editor.link_go_to_definition_state.definitions.clear();
372 cx.notify();
373 }
374
375 editor.link_go_to_definition_state.task = None;
376
377 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
378 }
379
380 false
381 }
382
383 fn mouse_left_down(
384 editor: &mut Editor,
385 event: &MouseDownEvent,
386 position_map: &PositionMap,
387 text_bounds: Bounds<Pixels>,
388 gutter_bounds: Bounds<Pixels>,
389 stacking_order: &StackingOrder,
390 cx: &mut ViewContext<Editor>,
391 ) {
392 let mut click_count = event.click_count;
393 let modifiers = event.modifiers;
394
395 if cx.default_prevented() {
396 return;
397 } else if gutter_bounds.contains(&event.position) {
398 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
399 } else if !text_bounds.contains(&event.position) {
400 return;
401 }
402 if !cx.was_top_layer(&event.position, stacking_order) {
403 return;
404 }
405
406 let point_for_position = position_map.point_for_position(text_bounds, event.position);
407 let position = point_for_position.previous_valid;
408 if modifiers.shift && modifiers.alt {
409 editor.select(
410 SelectPhase::BeginColumnar {
411 position,
412 goal_column: point_for_position.exact_unclipped.column(),
413 },
414 cx,
415 );
416 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
417 editor.select(
418 SelectPhase::Extend {
419 position,
420 click_count,
421 },
422 cx,
423 );
424 } else {
425 editor.select(
426 SelectPhase::Begin {
427 position,
428 add: modifiers.alt,
429 click_count,
430 },
431 cx,
432 );
433 }
434
435 cx.stop_propagation();
436 }
437
438 fn mouse_right_down(
439 editor: &mut Editor,
440 event: &MouseDownEvent,
441 position_map: &PositionMap,
442 text_bounds: Bounds<Pixels>,
443 cx: &mut ViewContext<Editor>,
444 ) {
445 if !text_bounds.contains(&event.position) {
446 return;
447 }
448 let point_for_position = position_map.point_for_position(text_bounds, event.position);
449 mouse_context_menu::deploy_context_menu(
450 editor,
451 event.position,
452 point_for_position.previous_valid,
453 cx,
454 );
455 cx.stop_propagation();
456 }
457
458 fn mouse_up(
459 editor: &mut Editor,
460 event: &MouseUpEvent,
461 position_map: &PositionMap,
462 text_bounds: Bounds<Pixels>,
463 interactive_bounds: &InteractiveBounds,
464 stacking_order: &StackingOrder,
465 cx: &mut ViewContext<Editor>,
466 ) {
467 let end_selection = editor.has_pending_selection();
468 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
469
470 if end_selection {
471 editor.select(SelectPhase::End, cx);
472 }
473
474 if interactive_bounds.visibly_contains(&event.position, cx)
475 && !pending_nonempty_selections
476 && event.modifiers.command
477 && text_bounds.contains(&event.position)
478 && cx.was_top_layer(&event.position, stacking_order)
479 {
480 let point = position_map.point_for_position(text_bounds, event.position);
481 let could_be_inlay = point.as_valid().is_none();
482 let split = event.modifiers.alt;
483 if event.modifiers.shift || could_be_inlay {
484 go_to_fetched_type_definition(editor, point, split, cx);
485 } else {
486 go_to_fetched_definition(editor, point, split, cx);
487 }
488
489 cx.stop_propagation();
490 } else if end_selection {
491 cx.stop_propagation();
492 }
493 }
494
495 fn mouse_dragged(
496 editor: &mut Editor,
497 event: &MouseMoveEvent,
498 position_map: &PositionMap,
499 text_bounds: Bounds<Pixels>,
500 _gutter_bounds: Bounds<Pixels>,
501 _stacking_order: &StackingOrder,
502 cx: &mut ViewContext<Editor>,
503 ) {
504 if !editor.has_pending_selection() {
505 return;
506 }
507
508 let point_for_position = position_map.point_for_position(text_bounds, event.position);
509 let mut scroll_delta = gpui::Point::<f32>::default();
510 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
511 let top = text_bounds.origin.y + vertical_margin;
512 let bottom = text_bounds.lower_left().y - vertical_margin;
513 if event.position.y < top {
514 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
515 }
516 if event.position.y > bottom {
517 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
518 }
519
520 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
521 let left = text_bounds.origin.x + horizontal_margin;
522 let right = text_bounds.upper_right().x - horizontal_margin;
523 if event.position.x < left {
524 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
525 }
526 if event.position.x > right {
527 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
528 }
529
530 editor.select(
531 SelectPhase::Update {
532 position: point_for_position.previous_valid,
533 goal_column: point_for_position.exact_unclipped.column(),
534 scroll_delta,
535 },
536 cx,
537 );
538 }
539
540 fn mouse_moved(
541 editor: &mut Editor,
542 event: &MouseMoveEvent,
543 position_map: &PositionMap,
544 text_bounds: Bounds<Pixels>,
545 gutter_bounds: Bounds<Pixels>,
546 stacking_order: &StackingOrder,
547 cx: &mut ViewContext<Editor>,
548 ) {
549 let modifiers = event.modifiers;
550 let text_hovered = text_bounds.contains(&event.position);
551 let gutter_hovered = gutter_bounds.contains(&event.position);
552 let was_top = cx.was_top_layer(&event.position, stacking_order);
553
554 editor.set_gutter_hovered(gutter_hovered, cx);
555
556 // Don't trigger hover popover if mouse is hovering over context menu
557 if text_hovered && was_top {
558 let point_for_position = position_map.point_for_position(text_bounds, event.position);
559
560 match point_for_position.as_valid() {
561 Some(point) => {
562 update_go_to_definition_link(
563 editor,
564 Some(GoToDefinitionTrigger::Text(point)),
565 modifiers.command,
566 modifiers.shift,
567 cx,
568 );
569 hover_at(editor, Some(point), cx);
570 Self::update_visible_cursor(editor, point, cx);
571 }
572 None => {
573 update_inlay_link_and_hover_points(
574 &position_map.snapshot,
575 point_for_position,
576 editor,
577 modifiers.command,
578 modifiers.shift,
579 cx,
580 );
581 }
582 }
583 } else {
584 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
585 hover_at(editor, None, cx);
586 if gutter_hovered && was_top {
587 cx.stop_propagation();
588 }
589 }
590 }
591
592 fn update_visible_cursor(
593 editor: &mut Editor,
594 point: DisplayPoint,
595 cx: &mut ViewContext<Editor>,
596 ) {
597 let snapshot = editor.snapshot(cx);
598 let Some(hub) = editor.collaboration_hub() else {
599 return;
600 };
601 let range = DisplayPoint::new(point.row(), point.column().saturating_sub(1))
602 ..DisplayPoint::new(
603 point.row(),
604 (point.column() + 1).min(snapshot.line_len(point.row())),
605 );
606
607 let range = snapshot
608 .buffer_snapshot
609 .anchor_at(range.start.to_point(&snapshot.display_snapshot), Bias::Left)
610 ..snapshot
611 .buffer_snapshot
612 .anchor_at(range.end.to_point(&snapshot.display_snapshot), Bias::Right);
613
614 let Some(selection) = snapshot.remote_selections_in_range(&range, hub, cx).next() else {
615 return;
616 };
617 let key = crate::HoveredCursor {
618 replica_id: selection.replica_id,
619 selection_id: selection.selection.id,
620 };
621 editor.hovered_cursors.insert(
622 key.clone(),
623 cx.spawn(|editor, mut cx| async move {
624 cx.background_executor().timer(CURSORS_VISIBLE_FOR).await;
625 editor
626 .update(&mut cx, |editor, cx| {
627 editor.hovered_cursors.remove(&key);
628 cx.notify();
629 })
630 .ok();
631 }),
632 );
633 cx.notify()
634 }
635
636 fn paint_background(
637 &self,
638 gutter_bounds: Bounds<Pixels>,
639 text_bounds: Bounds<Pixels>,
640 layout: &LayoutState,
641 cx: &mut ElementContext,
642 ) {
643 let bounds = gutter_bounds.union(&text_bounds);
644 let scroll_top =
645 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
646 let gutter_bg = cx.theme().colors().editor_gutter_background;
647 cx.paint_quad(fill(gutter_bounds, gutter_bg));
648 cx.paint_quad(fill(text_bounds, self.style.background));
649
650 if let EditorMode::Full = layout.mode {
651 let mut active_rows = layout.active_rows.iter().peekable();
652 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
653 let mut end_row = *start_row;
654 while active_rows.peek().map_or(false, |r| {
655 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
656 }) {
657 active_rows.next().unwrap();
658 end_row += 1;
659 }
660
661 if !contains_non_empty_selection {
662 let origin = point(
663 bounds.origin.x,
664 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
665 - scroll_top,
666 );
667 let size = size(
668 bounds.size.width,
669 layout.position_map.line_height * (end_row - start_row + 1) as f32,
670 );
671 let active_line_bg = cx.theme().colors().editor_active_line_background;
672 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
673 }
674 }
675
676 if let Some(highlighted_rows) = &layout.highlighted_rows {
677 let origin = point(
678 bounds.origin.x,
679 bounds.origin.y
680 + (layout.position_map.line_height * highlighted_rows.start as f32)
681 - scroll_top,
682 );
683 let size = size(
684 bounds.size.width,
685 layout.position_map.line_height * highlighted_rows.len() as f32,
686 );
687 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
688 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
689 }
690
691 let scroll_left =
692 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
693
694 for (wrap_position, active) in layout.wrap_guides.iter() {
695 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
696 - scroll_left;
697
698 if x < text_bounds.origin.x
699 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
700 {
701 continue;
702 }
703
704 let color = if *active {
705 cx.theme().colors().editor_active_wrap_guide
706 } else {
707 cx.theme().colors().editor_wrap_guide
708 };
709 cx.paint_quad(fill(
710 Bounds {
711 origin: point(x, text_bounds.origin.y),
712 size: size(px(1.), text_bounds.size.height),
713 },
714 color,
715 ));
716 }
717 }
718 }
719
720 fn paint_gutter(
721 &mut self,
722 bounds: Bounds<Pixels>,
723 layout: &mut LayoutState,
724 cx: &mut ElementContext,
725 ) {
726 let line_height = layout.position_map.line_height;
727
728 let scroll_position = layout.position_map.snapshot.scroll_position();
729 let scroll_top = scroll_position.y * line_height;
730
731 let show_gutter = matches!(
732 ProjectSettings::get_global(cx).git.git_gutter,
733 Some(GitGutterSetting::TrackedFiles)
734 );
735
736 if show_gutter {
737 Self::paint_diff_hunks(bounds, layout, cx);
738 }
739
740 for (ix, line) in layout.line_numbers.iter().enumerate() {
741 if let Some(line) = line {
742 let line_origin = bounds.origin
743 + point(
744 bounds.size.width - line.width - layout.gutter_padding,
745 ix as f32 * line_height - (scroll_top % line_height),
746 );
747
748 line.paint(line_origin, line_height, cx).log_err();
749 }
750 }
751
752 cx.with_z_index(1, |cx| {
753 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
754 if let Some(fold_indicator) = fold_indicator {
755 let mut fold_indicator = fold_indicator.into_any_element();
756 let available_space = size(
757 AvailableSpace::MinContent,
758 AvailableSpace::Definite(line_height * 0.55),
759 );
760 let fold_indicator_size = fold_indicator.measure(available_space, cx);
761
762 let position = point(
763 bounds.size.width - layout.gutter_padding,
764 ix as f32 * line_height - (scroll_top % line_height),
765 );
766 let centering_offset = point(
767 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
768 / 2.,
769 (line_height - fold_indicator_size.height) / 2.,
770 );
771 let origin = bounds.origin + position + centering_offset;
772 fold_indicator.draw(origin, available_space, cx);
773 }
774 }
775
776 if let Some(indicator) = layout.code_actions_indicator.take() {
777 let mut button = indicator.button.into_any_element();
778 let available_space = size(
779 AvailableSpace::MinContent,
780 AvailableSpace::Definite(line_height),
781 );
782 let indicator_size = button.measure(available_space, cx);
783
784 let mut x = Pixels::ZERO;
785 let mut y = indicator.row as f32 * line_height - scroll_top;
786 // Center indicator.
787 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
788 y += (line_height - indicator_size.height) / 2.;
789
790 button.draw(bounds.origin + point(x, y), available_space, cx);
791 }
792 });
793 }
794
795 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut ElementContext) {
796 let line_height = layout.position_map.line_height;
797
798 let scroll_position = layout.position_map.snapshot.scroll_position();
799 let scroll_top = scroll_position.y * line_height;
800
801 for hunk in &layout.display_hunks {
802 let (display_row_range, status) = match hunk {
803 //TODO: This rendering is entirely a horrible hack
804 &DisplayDiffHunk::Folded { display_row: row } => {
805 let start_y = row as f32 * line_height - scroll_top;
806 let end_y = start_y + line_height;
807
808 let width = 0.275 * line_height;
809 let highlight_origin = bounds.origin + point(-width, start_y);
810 let highlight_size = size(width * 2., end_y - start_y);
811 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
812 cx.paint_quad(quad(
813 highlight_bounds,
814 Corners::all(1. * line_height),
815 cx.theme().status().modified,
816 Edges::default(),
817 transparent_black(),
818 ));
819
820 continue;
821 }
822
823 DisplayDiffHunk::Unfolded {
824 display_row_range,
825 status,
826 } => (display_row_range, status),
827 };
828
829 let color = match status {
830 DiffHunkStatus::Added => cx.theme().status().created,
831 DiffHunkStatus::Modified => cx.theme().status().modified,
832
833 //TODO: This rendering is entirely a horrible hack
834 DiffHunkStatus::Removed => {
835 let row = display_row_range.start;
836
837 let offset = line_height / 2.;
838 let start_y = row as f32 * line_height - offset - scroll_top;
839 let end_y = start_y + line_height;
840
841 let width = 0.275 * line_height;
842 let highlight_origin = bounds.origin + point(-width, start_y);
843 let highlight_size = size(width * 2., end_y - start_y);
844 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
845 cx.paint_quad(quad(
846 highlight_bounds,
847 Corners::all(1. * line_height),
848 cx.theme().status().deleted,
849 Edges::default(),
850 transparent_black(),
851 ));
852
853 continue;
854 }
855 };
856
857 let start_row = display_row_range.start;
858 let end_row = display_row_range.end;
859 // If we're in a multibuffer, row range span might include an
860 // excerpt header, so if we were to draw the marker straight away,
861 // the hunk might include the rows of that header.
862 // Making the range inclusive doesn't quite cut it, as we rely on the exclusivity for the soft wrap.
863 // Instead, we simply check whether the range we're dealing with includes
864 // any excerpt headers and if so, we stop painting the diff hunk on the first row of that header.
865 let end_row_in_current_excerpt = layout
866 .position_map
867 .snapshot
868 .blocks_in_range(start_row..end_row)
869 .find_map(|(start_row, block)| {
870 if matches!(block, TransformBlock::ExcerptHeader { .. }) {
871 Some(start_row)
872 } else {
873 None
874 }
875 })
876 .unwrap_or(end_row);
877
878 let start_y = start_row as f32 * line_height - scroll_top;
879 let end_y = end_row_in_current_excerpt as f32 * line_height - scroll_top;
880
881 let width = 0.275 * line_height;
882 let highlight_origin = bounds.origin + point(-width, start_y);
883 let highlight_size = size(width * 2., end_y - start_y);
884 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
885 cx.paint_quad(quad(
886 highlight_bounds,
887 Corners::all(0.05 * line_height),
888 color,
889 Edges::default(),
890 transparent_black(),
891 ));
892 }
893 }
894
895 fn paint_text(
896 &mut self,
897 text_bounds: Bounds<Pixels>,
898 layout: &mut LayoutState,
899 cx: &mut ElementContext,
900 ) {
901 let start_row = layout.visible_display_row_range.start;
902 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
903 let line_end_overshoot = 0.15 * layout.position_map.line_height;
904 let whitespace_setting = self
905 .editor
906 .read(cx)
907 .buffer
908 .read(cx)
909 .settings_at(0, cx)
910 .show_whitespaces;
911
912 cx.with_content_mask(
913 Some(ContentMask {
914 bounds: text_bounds,
915 }),
916 |cx| {
917 let interactive_text_bounds = InteractiveBounds {
918 bounds: text_bounds,
919 stacking_order: cx.stacking_order().clone(),
920 };
921 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
922 if self
923 .editor
924 .read(cx)
925 .link_go_to_definition_state
926 .definitions
927 .is_empty()
928 {
929 cx.set_cursor_style(CursorStyle::IBeam);
930 } else {
931 cx.set_cursor_style(CursorStyle::PointingHand);
932 }
933 }
934
935 let fold_corner_radius = 0.15 * layout.position_map.line_height;
936 cx.with_element_id(Some("folds"), |cx| {
937 let snapshot = &layout.position_map.snapshot;
938
939 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
940 let fold_range = fold.range.clone();
941 let display_range = fold.range.start.to_display_point(&snapshot)
942 ..fold.range.end.to_display_point(&snapshot);
943 debug_assert_eq!(display_range.start.row(), display_range.end.row());
944 let row = display_range.start.row();
945 debug_assert!(row < layout.visible_display_row_range.end);
946 let Some(line_layout) = &layout
947 .position_map
948 .line_layouts
949 .get((row - layout.visible_display_row_range.start) as usize)
950 .map(|l| &l.line)
951 else {
952 continue;
953 };
954
955 let start_x = content_origin.x
956 + line_layout.x_for_index(display_range.start.column() as usize)
957 - layout.position_map.scroll_position.x;
958 let start_y = content_origin.y
959 + row as f32 * layout.position_map.line_height
960 - layout.position_map.scroll_position.y;
961 let end_x = content_origin.x
962 + line_layout.x_for_index(display_range.end.column() as usize)
963 - layout.position_map.scroll_position.x;
964
965 let fold_bounds = Bounds {
966 origin: point(start_x, start_y),
967 size: size(end_x - start_x, layout.position_map.line_height),
968 };
969
970 let fold_background = cx.with_z_index(1, |cx| {
971 div()
972 .id(fold.id)
973 .size_full()
974 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
975 .on_click(cx.listener_for(
976 &self.editor,
977 move |editor: &mut Editor, _, cx| {
978 editor.unfold_ranges(
979 [fold_range.start..fold_range.end],
980 true,
981 false,
982 cx,
983 );
984 cx.stop_propagation();
985 },
986 ))
987 .draw_and_update_state(
988 fold_bounds.origin,
989 fold_bounds.size,
990 cx,
991 |fold_element_state, cx| {
992 if fold_element_state.is_active() {
993 cx.theme().colors().ghost_element_active
994 } else if fold_bounds.contains(&cx.mouse_position()) {
995 cx.theme().colors().ghost_element_hover
996 } else {
997 cx.theme().colors().ghost_element_background
998 }
999 },
1000 )
1001 });
1002
1003 self.paint_highlighted_range(
1004 display_range.clone(),
1005 fold_background,
1006 fold_corner_radius,
1007 fold_corner_radius * 2.,
1008 layout,
1009 content_origin,
1010 text_bounds,
1011 cx,
1012 );
1013 }
1014 });
1015
1016 for (range, color) in &layout.highlighted_ranges {
1017 self.paint_highlighted_range(
1018 range.clone(),
1019 *color,
1020 Pixels::ZERO,
1021 line_end_overshoot,
1022 layout,
1023 content_origin,
1024 text_bounds,
1025 cx,
1026 );
1027 }
1028
1029 let mut cursors = SmallVec::<[Cursor; 32]>::new();
1030 let corner_radius = 0.15 * layout.position_map.line_height;
1031 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
1032
1033 for (participant_ix, (selection_style, selections)) in
1034 layout.selections.iter().enumerate()
1035 {
1036 for selection in selections.into_iter() {
1037 self.paint_highlighted_range(
1038 selection.range.clone(),
1039 selection_style.selection,
1040 corner_radius,
1041 corner_radius * 2.,
1042 layout,
1043 content_origin,
1044 text_bounds,
1045 cx,
1046 );
1047
1048 if selection.is_local && !selection.range.is_empty() {
1049 invisible_display_ranges.push(selection.range.clone());
1050 }
1051
1052 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1053 let cursor_position = selection.head;
1054 if layout
1055 .visible_display_row_range
1056 .contains(&cursor_position.row())
1057 {
1058 let cursor_row_layout = &layout.position_map.line_layouts
1059 [(cursor_position.row() - start_row) as usize]
1060 .line;
1061 let cursor_column = cursor_position.column() as usize;
1062
1063 let cursor_character_x =
1064 cursor_row_layout.x_for_index(cursor_column);
1065 let mut block_width = cursor_row_layout
1066 .x_for_index(cursor_column + 1)
1067 - cursor_character_x;
1068 if block_width == Pixels::ZERO {
1069 block_width = layout.position_map.em_width;
1070 }
1071 let block_text = if let CursorShape::Block = selection.cursor_shape
1072 {
1073 layout
1074 .position_map
1075 .snapshot
1076 .chars_at(cursor_position)
1077 .next()
1078 .and_then(|(character, _)| {
1079 let text = if character == '\n' {
1080 SharedString::from(" ")
1081 } else {
1082 SharedString::from(character.to_string())
1083 };
1084 let len = text.len();
1085 cx.text_system()
1086 .shape_line(
1087 text,
1088 cursor_row_layout.font_size,
1089 &[TextRun {
1090 len,
1091 font: self.style.text.font(),
1092 color: self.style.background,
1093 background_color: None,
1094 underline: None,
1095 }],
1096 )
1097 .log_err()
1098 })
1099 } else {
1100 None
1101 };
1102
1103 let x = cursor_character_x - layout.position_map.scroll_position.x;
1104 let y = cursor_position.row() as f32
1105 * layout.position_map.line_height
1106 - layout.position_map.scroll_position.y;
1107 if selection.is_newest {
1108 self.editor.update(cx, |editor, _| {
1109 editor.pixel_position_of_newest_cursor = Some(point(
1110 text_bounds.origin.x + x + block_width / 2.,
1111 text_bounds.origin.y
1112 + y
1113 + layout.position_map.line_height / 2.,
1114 ))
1115 });
1116 }
1117
1118 cursors.push(Cursor {
1119 color: selection_style.cursor,
1120 block_width,
1121 origin: point(x, y),
1122 line_height: layout.position_map.line_height,
1123 shape: selection.cursor_shape,
1124 block_text,
1125 cursor_name: selection.user_name.clone().map(|name| {
1126 CursorName {
1127 string: name,
1128 color: self.style.background,
1129 is_top_row: cursor_position.row() == 0,
1130 z_index: (participant_ix % 256).try_into().unwrap(),
1131 }
1132 }),
1133 });
1134 }
1135 }
1136 }
1137 }
1138
1139 for (ix, line_with_invisibles) in
1140 layout.position_map.line_layouts.iter().enumerate()
1141 {
1142 let row = start_row + ix as u32;
1143 line_with_invisibles.draw(
1144 layout,
1145 row,
1146 content_origin,
1147 whitespace_setting,
1148 &invisible_display_ranges,
1149 cx,
1150 )
1151 }
1152
1153 cx.with_z_index(0, |cx| {
1154 for cursor in cursors {
1155 cursor.paint(content_origin, cx);
1156 }
1157 });
1158 },
1159 )
1160 }
1161
1162 fn paint_overlays(
1163 &mut self,
1164 text_bounds: Bounds<Pixels>,
1165 layout: &mut LayoutState,
1166 cx: &mut ElementContext,
1167 ) {
1168 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1169 let start_row = layout.visible_display_row_range.start;
1170 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1171 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1172 let context_menu_size = context_menu.measure(available_space, cx);
1173
1174 let cursor_row_layout =
1175 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1176 let x = cursor_row_layout.x_for_index(position.column() as usize)
1177 - layout.position_map.scroll_position.x;
1178 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1179 - layout.position_map.scroll_position.y;
1180 let mut list_origin = content_origin + point(x, y);
1181 let list_width = context_menu_size.width;
1182 let list_height = context_menu_size.height;
1183
1184 // Snap the right edge of the list to the right edge of the window if
1185 // its horizontal bounds overflow.
1186 if list_origin.x + list_width > cx.viewport_size().width {
1187 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1188 }
1189
1190 if list_origin.y + list_height > text_bounds.lower_right().y {
1191 list_origin.y -= layout.position_map.line_height + list_height;
1192 }
1193
1194 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1195 }
1196
1197 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1198 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1199
1200 // This is safe because we check on layout whether the required row is available
1201 let hovered_row_layout =
1202 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1203
1204 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1205 // height. This is the size we will use to decide whether to render popovers above or below
1206 // the hovered line.
1207 let first_size = hover_popovers[0].measure(available_space, cx);
1208 let height_to_reserve =
1209 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1210
1211 // Compute Hovered Point
1212 let x = hovered_row_layout.x_for_index(position.column() as usize)
1213 - layout.position_map.scroll_position.x;
1214 let y = position.row() as f32 * layout.position_map.line_height
1215 - layout.position_map.scroll_position.y;
1216 let hovered_point = content_origin + point(x, y);
1217
1218 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1219 // There is enough space above. Render popovers above the hovered point
1220 let mut current_y = hovered_point.y;
1221 for mut hover_popover in hover_popovers {
1222 let size = hover_popover.measure(available_space, cx);
1223 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1224
1225 let x_out_of_bounds =
1226 text_bounds.upper_right().x - (popover_origin.x + size.width);
1227 if x_out_of_bounds < Pixels::ZERO {
1228 popover_origin.x = popover_origin.x + x_out_of_bounds;
1229 }
1230
1231 if cx.was_top_layer(&popover_origin, cx.stacking_order()) {
1232 cx.break_content_mask(|cx| {
1233 hover_popover.draw(popover_origin, available_space, cx)
1234 });
1235 }
1236
1237 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1238 }
1239 } else {
1240 // There is not enough space above. Render popovers below the hovered point
1241 let mut current_y = hovered_point.y + layout.position_map.line_height;
1242 for mut hover_popover in hover_popovers {
1243 let size = hover_popover.measure(available_space, cx);
1244 let mut popover_origin = point(hovered_point.x, current_y);
1245
1246 let x_out_of_bounds =
1247 text_bounds.upper_right().x - (popover_origin.x + size.width);
1248 if x_out_of_bounds < Pixels::ZERO {
1249 popover_origin.x = popover_origin.x + x_out_of_bounds;
1250 }
1251
1252 hover_popover.draw(popover_origin, available_space, cx);
1253
1254 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1255 }
1256 }
1257 }
1258
1259 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1260 let element = overlay()
1261 .position(mouse_context_menu.position)
1262 .child(mouse_context_menu.context_menu.clone())
1263 .anchor(AnchorCorner::TopLeft)
1264 .snap_to_window();
1265 element.into_any().draw(
1266 gpui::Point::default(),
1267 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1268 cx,
1269 );
1270 }
1271 }
1272
1273 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1274 bounds.upper_right().x - self.style.scrollbar_width
1275 }
1276
1277 fn paint_scrollbar(
1278 &mut self,
1279 bounds: Bounds<Pixels>,
1280 layout: &mut LayoutState,
1281 cx: &mut ElementContext,
1282 ) {
1283 if layout.mode != EditorMode::Full {
1284 return;
1285 }
1286
1287 // If a drag took place after we started dragging the scrollbar,
1288 // cancel the scrollbar drag.
1289 if cx.has_active_drag() {
1290 self.editor.update(cx, |editor, cx| {
1291 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1292 });
1293 }
1294
1295 let top = bounds.origin.y;
1296 let bottom = bounds.lower_left().y;
1297 let right = bounds.lower_right().x;
1298 let left = self.scrollbar_left(&bounds);
1299 let row_range = layout.scrollbar_row_range.clone();
1300 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1301
1302 let mut height = bounds.size.height;
1303 let mut first_row_y_offset = px(0.0);
1304
1305 // Impose a minimum height on the scrollbar thumb
1306 let row_height = height / max_row;
1307 let min_thumb_height = layout.position_map.line_height;
1308 let thumb_height = (row_range.end - row_range.start) * row_height;
1309 if thumb_height < min_thumb_height {
1310 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1311 height -= min_thumb_height - thumb_height;
1312 }
1313
1314 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1315
1316 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1317 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1318 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1319 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1320
1321 if layout.show_scrollbars {
1322 cx.paint_quad(quad(
1323 track_bounds,
1324 Corners::default(),
1325 cx.theme().colors().scrollbar_track_background,
1326 Edges {
1327 top: Pixels::ZERO,
1328 right: Pixels::ZERO,
1329 bottom: Pixels::ZERO,
1330 left: px(1.),
1331 },
1332 cx.theme().colors().scrollbar_track_border,
1333 ));
1334 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1335 if layout.is_singleton && scrollbar_settings.selections {
1336 let start_anchor = Anchor::min();
1337 let end_anchor = Anchor::max();
1338 let background_ranges = self
1339 .editor
1340 .read(cx)
1341 .background_highlight_row_ranges::<BufferSearchHighlights>(
1342 start_anchor..end_anchor,
1343 &layout.position_map.snapshot,
1344 50000,
1345 );
1346 for range in background_ranges {
1347 let start_y = y_for_row(range.start().row() as f32);
1348 let mut end_y = y_for_row(range.end().row() as f32);
1349 if end_y - start_y < px(1.) {
1350 end_y = start_y + px(1.);
1351 }
1352 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1353 cx.paint_quad(quad(
1354 bounds,
1355 Corners::default(),
1356 cx.theme().status().info,
1357 Edges {
1358 top: Pixels::ZERO,
1359 right: px(1.),
1360 bottom: Pixels::ZERO,
1361 left: px(1.),
1362 },
1363 cx.theme().colors().scrollbar_thumb_border,
1364 ));
1365 }
1366 }
1367
1368 if layout.is_singleton && scrollbar_settings.git_diff {
1369 for hunk in layout
1370 .position_map
1371 .snapshot
1372 .buffer_snapshot
1373 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1374 {
1375 let start_display = Point::new(hunk.buffer_range.start, 0)
1376 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1377 let end_display = Point::new(hunk.buffer_range.end, 0)
1378 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1379 let start_y = y_for_row(start_display.row() as f32);
1380 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1381 y_for_row((end_display.row() + 1) as f32)
1382 } else {
1383 y_for_row((end_display.row()) as f32)
1384 };
1385
1386 if end_y - start_y < px(1.) {
1387 end_y = start_y + px(1.);
1388 }
1389 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1390
1391 let color = match hunk.status() {
1392 DiffHunkStatus::Added => cx.theme().status().created,
1393 DiffHunkStatus::Modified => cx.theme().status().modified,
1394 DiffHunkStatus::Removed => cx.theme().status().deleted,
1395 };
1396 cx.paint_quad(quad(
1397 bounds,
1398 Corners::default(),
1399 color,
1400 Edges {
1401 top: Pixels::ZERO,
1402 right: px(1.),
1403 bottom: Pixels::ZERO,
1404 left: px(1.),
1405 },
1406 cx.theme().colors().scrollbar_thumb_border,
1407 ));
1408 }
1409 }
1410
1411 cx.paint_quad(quad(
1412 thumb_bounds,
1413 Corners::default(),
1414 cx.theme().colors().scrollbar_thumb_background,
1415 Edges {
1416 top: Pixels::ZERO,
1417 right: px(1.),
1418 bottom: Pixels::ZERO,
1419 left: px(1.),
1420 },
1421 cx.theme().colors().scrollbar_thumb_border,
1422 ));
1423 }
1424
1425 let interactive_track_bounds = InteractiveBounds {
1426 bounds: track_bounds,
1427 stacking_order: cx.stacking_order().clone(),
1428 };
1429 let mut mouse_position = cx.mouse_position();
1430 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1431 cx.set_cursor_style(CursorStyle::Arrow);
1432 }
1433
1434 cx.on_mouse_event({
1435 let editor = self.editor.clone();
1436 move |event: &MouseMoveEvent, phase, cx| {
1437 if phase == DispatchPhase::Capture {
1438 return;
1439 }
1440
1441 editor.update(cx, |editor, cx| {
1442 if event.pressed_button == Some(MouseButton::Left)
1443 && editor.scroll_manager.is_dragging_scrollbar()
1444 {
1445 let y = mouse_position.y;
1446 let new_y = event.position.y;
1447 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1448 let mut position = editor.scroll_position(cx);
1449 position.y += (new_y - y) * (max_row as f32) / height;
1450 if position.y < 0.0 {
1451 position.y = 0.0;
1452 }
1453 editor.set_scroll_position(position, cx);
1454 }
1455
1456 mouse_position = event.position;
1457 cx.stop_propagation();
1458 } else {
1459 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1460 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1461 editor.scroll_manager.show_scrollbar(cx);
1462 }
1463 }
1464 })
1465 }
1466 });
1467
1468 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1469 cx.on_mouse_event({
1470 let editor = self.editor.clone();
1471 move |_: &MouseUpEvent, phase, cx| {
1472 if phase == DispatchPhase::Capture {
1473 return;
1474 }
1475
1476 editor.update(cx, |editor, cx| {
1477 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1478 cx.stop_propagation();
1479 });
1480 }
1481 });
1482 } else {
1483 cx.on_mouse_event({
1484 let editor = self.editor.clone();
1485 move |event: &MouseDownEvent, phase, cx| {
1486 if phase == DispatchPhase::Capture {
1487 return;
1488 }
1489
1490 editor.update(cx, |editor, cx| {
1491 if track_bounds.contains(&event.position) {
1492 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1493
1494 let y = event.position.y;
1495 if y < thumb_top || thumb_bottom < y {
1496 let center_row =
1497 ((y - top) * max_row as f32 / height).round() as u32;
1498 let top_row = center_row
1499 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1500 let mut position = editor.scroll_position(cx);
1501 position.y = top_row as f32;
1502 editor.set_scroll_position(position, cx);
1503 } else {
1504 editor.scroll_manager.show_scrollbar(cx);
1505 }
1506
1507 cx.stop_propagation();
1508 }
1509 });
1510 }
1511 });
1512 }
1513 }
1514
1515 #[allow(clippy::too_many_arguments)]
1516 fn paint_highlighted_range(
1517 &self,
1518 range: Range<DisplayPoint>,
1519 color: Hsla,
1520 corner_radius: Pixels,
1521 line_end_overshoot: Pixels,
1522 layout: &LayoutState,
1523 content_origin: gpui::Point<Pixels>,
1524 bounds: Bounds<Pixels>,
1525 cx: &mut ElementContext,
1526 ) {
1527 let start_row = layout.visible_display_row_range.start;
1528 let end_row = layout.visible_display_row_range.end;
1529 if range.start != range.end {
1530 let row_range = if range.end.column() == 0 {
1531 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1532 } else {
1533 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1534 };
1535
1536 let highlighted_range = HighlightedRange {
1537 color,
1538 line_height: layout.position_map.line_height,
1539 corner_radius,
1540 start_y: content_origin.y
1541 + row_range.start as f32 * layout.position_map.line_height
1542 - layout.position_map.scroll_position.y,
1543 lines: row_range
1544 .into_iter()
1545 .map(|row| {
1546 let line_layout =
1547 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1548 HighlightedRangeLine {
1549 start_x: if row == range.start.row() {
1550 content_origin.x
1551 + line_layout.x_for_index(range.start.column() as usize)
1552 - layout.position_map.scroll_position.x
1553 } else {
1554 content_origin.x - layout.position_map.scroll_position.x
1555 },
1556 end_x: if row == range.end.row() {
1557 content_origin.x
1558 + line_layout.x_for_index(range.end.column() as usize)
1559 - layout.position_map.scroll_position.x
1560 } else {
1561 content_origin.x + line_layout.width + line_end_overshoot
1562 - layout.position_map.scroll_position.x
1563 },
1564 }
1565 })
1566 .collect(),
1567 };
1568
1569 highlighted_range.paint(bounds, cx);
1570 }
1571 }
1572
1573 fn paint_blocks(
1574 &mut self,
1575 bounds: Bounds<Pixels>,
1576 layout: &mut LayoutState,
1577 cx: &mut ElementContext,
1578 ) {
1579 let scroll_position = layout.position_map.snapshot.scroll_position();
1580 let scroll_left = scroll_position.x * layout.position_map.em_width;
1581 let scroll_top = scroll_position.y * layout.position_map.line_height;
1582
1583 for mut block in layout.blocks.drain(..) {
1584 let mut origin = bounds.origin
1585 + point(
1586 Pixels::ZERO,
1587 block.row as f32 * layout.position_map.line_height - scroll_top,
1588 );
1589 if !matches!(block.style, BlockStyle::Sticky) {
1590 origin += point(-scroll_left, Pixels::ZERO);
1591 }
1592 block.element.draw(origin, block.available_space, cx);
1593 }
1594 }
1595
1596 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1597 let style = &self.style;
1598 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1599 let layout = cx
1600 .text_system()
1601 .shape_line(
1602 SharedString::from(" ".repeat(column)),
1603 font_size,
1604 &[TextRun {
1605 len: column,
1606 font: style.text.font(),
1607 color: Hsla::default(),
1608 background_color: None,
1609 underline: None,
1610 }],
1611 )
1612 .unwrap();
1613
1614 layout.width
1615 }
1616
1617 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1618 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1619 self.column_pixels(digit_count, cx)
1620 }
1621
1622 //Folds contained in a hunk are ignored apart from shrinking visual size
1623 //If a fold contains any hunks then that fold line is marked as modified
1624 fn layout_git_gutters(
1625 &self,
1626 display_rows: Range<u32>,
1627 snapshot: &EditorSnapshot,
1628 ) -> Vec<DisplayDiffHunk> {
1629 let buffer_snapshot = &snapshot.buffer_snapshot;
1630
1631 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1632 .to_point(snapshot)
1633 .row;
1634 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1635 .to_point(snapshot)
1636 .row;
1637
1638 buffer_snapshot
1639 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1640 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1641 .dedup()
1642 .collect()
1643 }
1644
1645 fn calculate_relative_line_numbers(
1646 &self,
1647 snapshot: &EditorSnapshot,
1648 rows: &Range<u32>,
1649 relative_to: Option<u32>,
1650 ) -> HashMap<u32, u32> {
1651 let mut relative_rows: HashMap<u32, u32> = Default::default();
1652 let Some(relative_to) = relative_to else {
1653 return relative_rows;
1654 };
1655
1656 let start = rows.start.min(relative_to);
1657 let end = rows.end.max(relative_to);
1658
1659 let buffer_rows = snapshot
1660 .buffer_rows(start)
1661 .take(1 + (end - start) as usize)
1662 .collect::<Vec<_>>();
1663
1664 let head_idx = relative_to - start;
1665 let mut delta = 1;
1666 let mut i = head_idx + 1;
1667 while i < buffer_rows.len() as u32 {
1668 if buffer_rows[i as usize].is_some() {
1669 if rows.contains(&(i + start)) {
1670 relative_rows.insert(i + start, delta);
1671 }
1672 delta += 1;
1673 }
1674 i += 1;
1675 }
1676 delta = 1;
1677 i = head_idx.min(buffer_rows.len() as u32 - 1);
1678 while i > 0 && buffer_rows[i as usize].is_none() {
1679 i -= 1;
1680 }
1681
1682 while i > 0 {
1683 i -= 1;
1684 if buffer_rows[i as usize].is_some() {
1685 if rows.contains(&(i + start)) {
1686 relative_rows.insert(i + start, delta);
1687 }
1688 delta += 1;
1689 }
1690 }
1691
1692 relative_rows
1693 }
1694
1695 fn shape_line_numbers(
1696 &self,
1697 rows: Range<u32>,
1698 active_rows: &BTreeMap<u32, bool>,
1699 newest_selection_head: DisplayPoint,
1700 is_singleton: bool,
1701 snapshot: &EditorSnapshot,
1702 cx: &ViewContext<Editor>,
1703 ) -> (
1704 Vec<Option<ShapedLine>>,
1705 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1706 ) {
1707 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1708 let include_line_numbers = snapshot.mode == EditorMode::Full;
1709 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1710 let mut fold_statuses = Vec::with_capacity(rows.len());
1711 let mut line_number = String::new();
1712 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1713 let relative_to = if is_relative {
1714 Some(newest_selection_head.row())
1715 } else {
1716 None
1717 };
1718
1719 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1720
1721 for (ix, row) in snapshot
1722 .buffer_rows(rows.start)
1723 .take((rows.end - rows.start) as usize)
1724 .enumerate()
1725 {
1726 let display_row = rows.start + ix as u32;
1727 let (active, color) = if active_rows.contains_key(&display_row) {
1728 (true, cx.theme().colors().editor_active_line_number)
1729 } else {
1730 (false, cx.theme().colors().editor_line_number)
1731 };
1732 if let Some(buffer_row) = row {
1733 if include_line_numbers {
1734 line_number.clear();
1735 let default_number = buffer_row + 1;
1736 let number = relative_rows
1737 .get(&(ix as u32 + rows.start))
1738 .unwrap_or(&default_number);
1739 write!(&mut line_number, "{}", number).unwrap();
1740 let run = TextRun {
1741 len: line_number.len(),
1742 font: self.style.text.font(),
1743 color,
1744 background_color: None,
1745 underline: None,
1746 };
1747 let shaped_line = cx
1748 .text_system()
1749 .shape_line(line_number.clone().into(), font_size, &[run])
1750 .unwrap();
1751 shaped_line_numbers.push(Some(shaped_line));
1752 fold_statuses.push(
1753 is_singleton
1754 .then(|| {
1755 snapshot
1756 .fold_for_line(buffer_row)
1757 .map(|fold_status| (fold_status, buffer_row, active))
1758 })
1759 .flatten(),
1760 )
1761 }
1762 } else {
1763 fold_statuses.push(None);
1764 shaped_line_numbers.push(None);
1765 }
1766 }
1767
1768 (shaped_line_numbers, fold_statuses)
1769 }
1770
1771 fn layout_lines(
1772 &self,
1773 rows: Range<u32>,
1774 line_number_layouts: &[Option<ShapedLine>],
1775 snapshot: &EditorSnapshot,
1776 cx: &ViewContext<Editor>,
1777 ) -> Vec<LineWithInvisibles> {
1778 if rows.start >= rows.end {
1779 return Vec::new();
1780 }
1781
1782 // Show the placeholder when the editor is empty
1783 if snapshot.is_empty() {
1784 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1785 let placeholder_color = cx.theme().colors().text_placeholder;
1786 let placeholder_text = snapshot.placeholder_text();
1787
1788 let placeholder_lines = placeholder_text
1789 .as_ref()
1790 .map_or("", AsRef::as_ref)
1791 .split('\n')
1792 .skip(rows.start as usize)
1793 .chain(iter::repeat(""))
1794 .take(rows.len());
1795 placeholder_lines
1796 .filter_map(move |line| {
1797 let run = TextRun {
1798 len: line.len(),
1799 font: self.style.text.font(),
1800 color: placeholder_color,
1801 background_color: None,
1802 underline: Default::default(),
1803 };
1804 cx.text_system()
1805 .shape_line(line.to_string().into(), font_size, &[run])
1806 .log_err()
1807 })
1808 .map(|line| LineWithInvisibles {
1809 line,
1810 invisibles: Vec::new(),
1811 })
1812 .collect()
1813 } else {
1814 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1815 LineWithInvisibles::from_chunks(
1816 chunks,
1817 &self.style.text,
1818 MAX_LINE_LEN,
1819 rows.len() as usize,
1820 line_number_layouts,
1821 snapshot.mode,
1822 cx,
1823 )
1824 }
1825 }
1826
1827 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut ElementContext) -> LayoutState {
1828 self.editor.update(cx, |editor, cx| {
1829 let snapshot = editor.snapshot(cx);
1830 let style = self.style.clone();
1831
1832 let font_id = cx.text_system().resolve_font(&style.text.font());
1833 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1834 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1835 let em_width = cx
1836 .text_system()
1837 .typographic_bounds(font_id, font_size, 'm')
1838 .unwrap()
1839 .size
1840 .width;
1841 let em_advance = cx
1842 .text_system()
1843 .advance(font_id, font_size, 'm')
1844 .unwrap()
1845 .width;
1846
1847 let gutter_dimensions = snapshot.gutter_dimensions(font_id, font_size, em_width, self.max_line_number_width(&snapshot, cx), cx);
1848
1849 editor.gutter_width = gutter_dimensions.width;
1850
1851 let text_width = bounds.size.width - gutter_dimensions.width;
1852 let overscroll = size(em_width, px(0.));
1853 let _snapshot = {
1854 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1855
1856 let editor_width = text_width - gutter_dimensions.margin - overscroll.width - em_width;
1857 let wrap_width = match editor.soft_wrap_mode(cx) {
1858 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1859 SoftWrap::EditorWidth => editor_width,
1860 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1861 };
1862
1863 if editor.set_wrap_width(Some(wrap_width), cx) {
1864 editor.snapshot(cx)
1865 } else {
1866 snapshot
1867 }
1868 };
1869
1870 let wrap_guides = editor
1871 .wrap_guides(cx)
1872 .iter()
1873 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1874 .collect::<SmallVec<[_; 2]>>();
1875
1876 let gutter_size = size(gutter_dimensions.width, bounds.size.height);
1877 let text_size = size(text_width, bounds.size.height);
1878
1879 let autoscroll_horizontally =
1880 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1881 let mut snapshot = editor.snapshot(cx);
1882
1883 let scroll_position = snapshot.scroll_position();
1884 // The scroll position is a fractional point, the whole number of which represents
1885 // the top of the window in terms of display rows.
1886 let start_row = scroll_position.y as u32;
1887 let height_in_lines = f32::from(bounds.size.height / line_height);
1888 let max_row = snapshot.max_point().row();
1889
1890 // Add 1 to ensure selections bleed off screen
1891 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1892
1893 let start_anchor = if start_row == 0 {
1894 Anchor::min()
1895 } else {
1896 snapshot
1897 .buffer_snapshot
1898 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1899 };
1900 let end_anchor = if end_row > max_row {
1901 Anchor::max()
1902 } else {
1903 snapshot
1904 .buffer_snapshot
1905 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1906 };
1907
1908 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1909 let mut active_rows = BTreeMap::new();
1910 let is_singleton = editor.is_singleton(cx);
1911
1912 let highlighted_rows = editor.highlighted_rows();
1913 let highlighted_ranges = editor.background_highlights_in_range(
1914 start_anchor..end_anchor,
1915 &snapshot.display_snapshot,
1916 cx.theme().colors(),
1917 );
1918
1919 let mut newest_selection_head = None;
1920
1921 if editor.show_local_selections {
1922 let mut local_selections: Vec<Selection<Point>> = editor
1923 .selections
1924 .disjoint_in_range(start_anchor..end_anchor, cx);
1925 local_selections.extend(editor.selections.pending(cx));
1926 let mut layouts = Vec::new();
1927 let newest = editor.selections.newest(cx);
1928 for selection in local_selections.drain(..) {
1929 let is_empty = selection.start == selection.end;
1930 let is_newest = selection == newest;
1931
1932 let layout = SelectionLayout::new(
1933 selection,
1934 editor.selections.line_mode,
1935 editor.cursor_shape,
1936 &snapshot.display_snapshot,
1937 is_newest,
1938 true,
1939 None,
1940 );
1941 if is_newest {
1942 newest_selection_head = Some(layout.head);
1943 }
1944
1945 for row in cmp::max(layout.active_rows.start, start_row)
1946 ..=cmp::min(layout.active_rows.end, end_row)
1947 {
1948 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1949 *contains_non_empty_selection |= !is_empty;
1950 }
1951 layouts.push(layout);
1952 }
1953
1954 let player = if editor.read_only(cx) {
1955 cx.theme().players().read_only()
1956 } else {
1957 style.local_player
1958 };
1959
1960 selections.push((player, layouts));
1961 }
1962
1963 if let Some(collaboration_hub) = &editor.collaboration_hub {
1964 // When following someone, render the local selections in their color.
1965 if let Some(leader_id) = editor.leader_peer_id {
1966 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1967 if let Some(participant_index) = collaboration_hub
1968 .user_participant_indices(cx)
1969 .get(&collaborator.user_id)
1970 {
1971 if let Some((local_selection_style, _)) = selections.first_mut() {
1972 *local_selection_style = cx
1973 .theme()
1974 .players()
1975 .color_for_participant(participant_index.0);
1976 }
1977 }
1978 }
1979 }
1980
1981 let mut remote_selections = HashMap::default();
1982 for selection in snapshot.remote_selections_in_range(
1983 &(start_anchor..end_anchor),
1984 collaboration_hub.as_ref(),
1985 cx,
1986 ) {
1987 let selection_style = if let Some(participant_index) = selection.participant_index {
1988 cx.theme()
1989 .players()
1990 .color_for_participant(participant_index.0)
1991 } else {
1992 cx.theme().players().absent()
1993 };
1994
1995 // Don't re-render the leader's selections, since the local selections
1996 // match theirs.
1997 if Some(selection.peer_id) == editor.leader_peer_id {
1998 continue;
1999 }
2000 let key = HoveredCursor{replica_id: selection.replica_id, selection_id: selection.selection.id};
2001
2002 let is_shown = editor.show_cursor_names || editor.hovered_cursors.contains_key(&key);
2003
2004 remote_selections
2005 .entry(selection.replica_id)
2006 .or_insert((selection_style, Vec::new()))
2007 .1
2008 .push(SelectionLayout::new(
2009 selection.selection,
2010 selection.line_mode,
2011 selection.cursor_shape,
2012 &snapshot.display_snapshot,
2013 false,
2014 false,
2015 if is_shown {
2016 selection.user_name
2017 } else {
2018 None
2019 },
2020 ));
2021 }
2022
2023 selections.extend(remote_selections.into_values());
2024 }
2025
2026 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
2027 let show_scrollbars = match scrollbar_settings.show {
2028 ShowScrollbar::Auto => {
2029 // Git
2030 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2031 ||
2032 // Selections
2033 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
2034 // Scrollmanager
2035 || editor.scroll_manager.scrollbars_visible()
2036 }
2037 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2038 ShowScrollbar::Always => true,
2039 ShowScrollbar::Never => false,
2040 };
2041
2042 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
2043 let newest = editor.selections.newest::<Point>(cx);
2044 SelectionLayout::new(
2045 newest,
2046 editor.selections.line_mode,
2047 editor.cursor_shape,
2048 &snapshot.display_snapshot,
2049 true,
2050 true,
2051 None,
2052 )
2053 .head
2054 });
2055
2056 let (line_numbers, fold_statuses) = self.shape_line_numbers(
2057 start_row..end_row,
2058 &active_rows,
2059 head_for_relative,
2060 is_singleton,
2061 &snapshot,
2062 cx,
2063 );
2064
2065 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2066
2067 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2068
2069 let mut max_visible_line_width = Pixels::ZERO;
2070 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2071 for line_with_invisibles in &line_layouts {
2072 if line_with_invisibles.line.width > max_visible_line_width {
2073 max_visible_line_width = line_with_invisibles.line.width;
2074 }
2075 }
2076
2077 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2078 .unwrap()
2079 .width;
2080 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2081
2082 let editor_view = cx.view().clone();
2083 let (scroll_width, blocks) = cx.with_element_context(|cx| {
2084 cx.with_element_id(Some("editor_blocks"), |cx| {
2085 self.layout_blocks(
2086 start_row..end_row,
2087 &snapshot,
2088 bounds.size.width,
2089 scroll_width,
2090 text_width,
2091 gutter_dimensions.padding,
2092 gutter_dimensions.width,
2093 em_width,
2094 gutter_dimensions.width + gutter_dimensions.margin,
2095 line_height,
2096 &style,
2097 &line_layouts,
2098 editor,
2099 editor_view,
2100 cx,
2101 )
2102 })
2103 });
2104
2105 let scroll_max = point(
2106 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2107 max_row as f32,
2108 );
2109
2110 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2111
2112 let autoscrolled = if autoscroll_horizontally {
2113 editor.autoscroll_horizontally(
2114 start_row,
2115 text_size.width,
2116 scroll_width,
2117 em_width,
2118 &line_layouts,
2119 cx,
2120 )
2121 } else {
2122 false
2123 };
2124
2125 if clamped || autoscrolled {
2126 snapshot = editor.snapshot(cx);
2127 }
2128
2129 let mut context_menu = None;
2130 let mut code_actions_indicator = None;
2131 if let Some(newest_selection_head) = newest_selection_head {
2132 if (start_row..end_row).contains(&newest_selection_head.row()) {
2133 if editor.context_menu_visible() {
2134 let max_height = cmp::min(
2135 12. * line_height,
2136 cmp::max(
2137 3. * line_height,
2138 (bounds.size.height - line_height) / 2.,
2139 )
2140 );
2141 context_menu =
2142 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2143 }
2144
2145 let active = matches!(
2146 editor.context_menu.read().as_ref(),
2147 Some(crate::ContextMenu::CodeActions(_))
2148 );
2149
2150 code_actions_indicator = editor
2151 .render_code_actions_indicator(&style, active, cx)
2152 .map(|element| CodeActionsIndicator {
2153 row: newest_selection_head.row(),
2154 button: element,
2155 });
2156 }
2157 }
2158
2159 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2160 let max_size = size(
2161 (120. * em_width) // Default size
2162 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2163 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2164 (16. * line_height) // Default size
2165 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2166 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2167 );
2168
2169 let hover = if context_menu.is_some() {
2170 None
2171 } else {
2172 editor.hover_state.render(
2173 &snapshot,
2174 &style,
2175 visible_rows,
2176 max_size,
2177 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2178 cx,
2179 )
2180 };
2181
2182 let editor_view = cx.view().clone();
2183 let fold_indicators = cx.with_element_context(|cx| {
2184
2185 cx.with_element_id(Some("gutter_fold_indicators"), |_cx| {
2186 editor.render_fold_indicators(
2187 fold_statuses,
2188 &style,
2189 editor.gutter_hovered,
2190 line_height,
2191 gutter_dimensions.margin,
2192 editor_view,
2193 )
2194 })
2195 });
2196
2197 let invisible_symbol_font_size = font_size / 2.;
2198 let tab_invisible = cx
2199 .text_system()
2200 .shape_line(
2201 "→".into(),
2202 invisible_symbol_font_size,
2203 &[TextRun {
2204 len: "→".len(),
2205 font: self.style.text.font(),
2206 color: cx.theme().colors().editor_invisible,
2207 background_color: None,
2208 underline: None,
2209 }],
2210 )
2211 .unwrap();
2212 let space_invisible = cx
2213 .text_system()
2214 .shape_line(
2215 "•".into(),
2216 invisible_symbol_font_size,
2217 &[TextRun {
2218 len: "•".len(),
2219 font: self.style.text.font(),
2220 color: cx.theme().colors().editor_invisible,
2221 background_color: None,
2222 underline: None,
2223 }],
2224 )
2225 .unwrap();
2226
2227 LayoutState {
2228 mode: snapshot.mode,
2229 position_map: Arc::new(PositionMap {
2230 size: bounds.size,
2231 scroll_position: point(
2232 scroll_position.x * em_width,
2233 scroll_position.y * line_height,
2234 ),
2235 scroll_max,
2236 line_layouts,
2237 line_height,
2238 em_width,
2239 em_advance,
2240 snapshot,
2241 }),
2242 visible_anchor_range: start_anchor..end_anchor,
2243 visible_display_row_range: start_row..end_row,
2244 wrap_guides,
2245 gutter_size,
2246 gutter_padding: gutter_dimensions.padding,
2247 text_size,
2248 scrollbar_row_range,
2249 show_scrollbars,
2250 is_singleton,
2251 max_row,
2252 gutter_margin: gutter_dimensions.margin,
2253 active_rows,
2254 highlighted_rows,
2255 highlighted_ranges,
2256 line_numbers,
2257 display_hunks,
2258 blocks,
2259 selections,
2260 context_menu,
2261 code_actions_indicator,
2262 fold_indicators,
2263 tab_invisible,
2264 space_invisible,
2265 hover_popovers: hover,
2266 }
2267 })
2268 }
2269
2270 #[allow(clippy::too_many_arguments)]
2271 fn layout_blocks(
2272 &self,
2273 rows: Range<u32>,
2274 snapshot: &EditorSnapshot,
2275 editor_width: Pixels,
2276 scroll_width: Pixels,
2277 text_width: Pixels,
2278 gutter_padding: Pixels,
2279 gutter_width: Pixels,
2280 em_width: Pixels,
2281 text_x: Pixels,
2282 line_height: Pixels,
2283 style: &EditorStyle,
2284 line_layouts: &[LineWithInvisibles],
2285 editor: &mut Editor,
2286 editor_view: View<Editor>,
2287 cx: &mut ElementContext,
2288 ) -> (Pixels, Vec<BlockLayout>) {
2289 let mut block_id = 0;
2290 let (fixed_blocks, non_fixed_blocks) = snapshot
2291 .blocks_in_range(rows.clone())
2292 .partition::<Vec<_>, _>(|(_, block)| match block {
2293 TransformBlock::ExcerptHeader { .. } => false,
2294 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2295 });
2296
2297 let render_block = |block: &TransformBlock,
2298 available_space: Size<AvailableSpace>,
2299 block_id: usize,
2300 editor: &mut Editor,
2301 cx: &mut ElementContext| {
2302 let mut element = match block {
2303 TransformBlock::Custom(block) => {
2304 let align_to = block
2305 .position()
2306 .to_point(&snapshot.buffer_snapshot)
2307 .to_display_point(snapshot);
2308 let anchor_x = text_x
2309 + if rows.contains(&align_to.row()) {
2310 line_layouts[(align_to.row() - rows.start) as usize]
2311 .line
2312 .x_for_index(align_to.column() as usize)
2313 } else {
2314 layout_line(align_to.row(), snapshot, style, cx)
2315 .unwrap()
2316 .x_for_index(align_to.column() as usize)
2317 };
2318
2319 block.render(&mut BlockContext {
2320 context: cx,
2321 anchor_x,
2322 gutter_padding,
2323 line_height,
2324 gutter_width,
2325 em_width,
2326 block_id,
2327 max_width: scroll_width.max(text_width),
2328 view: editor_view.clone(),
2329 editor_style: &self.style,
2330 })
2331 }
2332
2333 TransformBlock::ExcerptHeader {
2334 buffer,
2335 range,
2336 starts_new_buffer,
2337 ..
2338 } => {
2339 let include_root = editor
2340 .project
2341 .as_ref()
2342 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2343 .unwrap_or_default();
2344
2345 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2346 let jump_path = ProjectPath {
2347 worktree_id: file.worktree_id(cx),
2348 path: file.path.clone(),
2349 };
2350 let jump_anchor = range
2351 .primary
2352 .as_ref()
2353 .map_or(range.context.start, |primary| primary.start);
2354 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2355
2356 cx.listener_for(&self.editor, move |editor, _, cx| {
2357 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2358 })
2359 });
2360
2361 let element = if *starts_new_buffer {
2362 let path = buffer.resolve_file_path(cx, include_root);
2363 let mut filename = None;
2364 let mut parent_path = None;
2365 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2366 if let Some(path) = path {
2367 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2368 parent_path = path
2369 .parent()
2370 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2371 }
2372
2373 v_flex()
2374 .id(("path header container", block_id))
2375 .size_full()
2376 .justify_center()
2377 .p(gpui::px(6.))
2378 .child(
2379 h_flex()
2380 .id("path header block")
2381 .size_full()
2382 .pl(gpui::px(12.))
2383 .pr(gpui::px(8.))
2384 .rounded_md()
2385 .shadow_md()
2386 .border()
2387 .border_color(cx.theme().colors().border)
2388 .bg(cx.theme().colors().editor_subheader_background)
2389 .justify_between()
2390 .hover(|style| style.bg(cx.theme().colors().element_hover))
2391 .child(
2392 h_flex().gap_3().child(
2393 h_flex()
2394 .gap_2()
2395 .child(
2396 filename
2397 .map(SharedString::from)
2398 .unwrap_or_else(|| "untitled".into()),
2399 )
2400 .when_some(parent_path, |then, path| {
2401 then.child(
2402 div().child(path).text_color(
2403 cx.theme().colors().text_muted,
2404 ),
2405 )
2406 }),
2407 ),
2408 )
2409 .when_some(jump_handler, |this, jump_handler| {
2410 this.cursor_pointer()
2411 .tooltip(|cx| {
2412 Tooltip::for_action(
2413 "Jump to Buffer",
2414 &OpenExcerpts,
2415 cx,
2416 )
2417 })
2418 .on_mouse_down(MouseButton::Left, |_, cx| {
2419 cx.stop_propagation()
2420 })
2421 .on_click(jump_handler)
2422 }),
2423 )
2424 } else {
2425 h_flex()
2426 .id(("collapsed context", block_id))
2427 .size_full()
2428 .gap(gutter_padding)
2429 .child(
2430 h_flex()
2431 .justify_end()
2432 .flex_none()
2433 .w(gutter_width - gutter_padding)
2434 .h_full()
2435 .text_buffer(cx)
2436 .text_color(cx.theme().colors().editor_line_number)
2437 .child("..."),
2438 )
2439 .child(
2440 ButtonLike::new("jump to collapsed context")
2441 .style(ButtonStyle::Transparent)
2442 .full_width()
2443 .child(
2444 div()
2445 .h_px()
2446 .w_full()
2447 .bg(cx.theme().colors().border_variant)
2448 .group_hover("", |style| {
2449 style.bg(cx.theme().colors().border)
2450 }),
2451 )
2452 .when_some(jump_handler, |this, jump_handler| {
2453 this.on_click(jump_handler).tooltip(|cx| {
2454 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2455 })
2456 }),
2457 )
2458 };
2459 element.into_any()
2460 }
2461 };
2462
2463 let size = element.measure(available_space, cx);
2464 (element, size)
2465 };
2466
2467 let mut fixed_block_max_width = Pixels::ZERO;
2468 let mut blocks = Vec::new();
2469 for (row, block) in fixed_blocks {
2470 let available_space = size(
2471 AvailableSpace::MinContent,
2472 AvailableSpace::Definite(block.height() as f32 * line_height),
2473 );
2474 let (element, element_size) =
2475 render_block(block, available_space, block_id, editor, cx);
2476 block_id += 1;
2477 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2478 blocks.push(BlockLayout {
2479 row,
2480 element,
2481 available_space,
2482 style: BlockStyle::Fixed,
2483 });
2484 }
2485 for (row, block) in non_fixed_blocks {
2486 let style = match block {
2487 TransformBlock::Custom(block) => block.style(),
2488 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2489 };
2490 let width = match style {
2491 BlockStyle::Sticky => editor_width,
2492 BlockStyle::Flex => editor_width
2493 .max(fixed_block_max_width)
2494 .max(gutter_width + scroll_width),
2495 BlockStyle::Fixed => unreachable!(),
2496 };
2497 let available_space = size(
2498 AvailableSpace::Definite(width),
2499 AvailableSpace::Definite(block.height() as f32 * line_height),
2500 );
2501 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2502 block_id += 1;
2503 blocks.push(BlockLayout {
2504 row,
2505 element,
2506 available_space,
2507 style,
2508 });
2509 }
2510 (
2511 scroll_width.max(fixed_block_max_width - gutter_width),
2512 blocks,
2513 )
2514 }
2515
2516 fn paint_scroll_wheel_listener(
2517 &mut self,
2518 interactive_bounds: &InteractiveBounds,
2519 layout: &LayoutState,
2520 cx: &mut ElementContext,
2521 ) {
2522 cx.on_mouse_event({
2523 let position_map = layout.position_map.clone();
2524 let editor = self.editor.clone();
2525 let interactive_bounds = interactive_bounds.clone();
2526 let mut delta = ScrollDelta::default();
2527
2528 move |event: &ScrollWheelEvent, phase, cx| {
2529 if phase == DispatchPhase::Bubble
2530 && interactive_bounds.visibly_contains(&event.position, cx)
2531 {
2532 delta = delta.coalesce(event.delta);
2533 editor.update(cx, |editor, cx| {
2534 let position = event.position;
2535 let position_map: &PositionMap = &position_map;
2536 let bounds = &interactive_bounds;
2537 if !bounds.visibly_contains(&position, cx) {
2538 return;
2539 }
2540
2541 let line_height = position_map.line_height;
2542 let max_glyph_width = position_map.em_width;
2543 let (delta, axis) = match delta {
2544 gpui::ScrollDelta::Pixels(mut pixels) => {
2545 //Trackpad
2546 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2547 (pixels, axis)
2548 }
2549
2550 gpui::ScrollDelta::Lines(lines) => {
2551 //Not trackpad
2552 let pixels =
2553 point(lines.x * max_glyph_width, lines.y * line_height);
2554 (pixels, None)
2555 }
2556 };
2557
2558 let scroll_position = position_map.snapshot.scroll_position();
2559 let x = f32::from(
2560 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2561 );
2562 let y =
2563 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2564 let scroll_position =
2565 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2566 editor.scroll(scroll_position, axis, cx);
2567 cx.stop_propagation();
2568 });
2569 }
2570 }
2571 });
2572 }
2573
2574 fn paint_mouse_listeners(
2575 &mut self,
2576 bounds: Bounds<Pixels>,
2577 gutter_bounds: Bounds<Pixels>,
2578 text_bounds: Bounds<Pixels>,
2579 layout: &LayoutState,
2580 cx: &mut ElementContext,
2581 ) {
2582 let interactive_bounds = InteractiveBounds {
2583 bounds: bounds.intersect(&cx.content_mask().bounds),
2584 stacking_order: cx.stacking_order().clone(),
2585 };
2586
2587 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2588
2589 cx.on_mouse_event({
2590 let position_map = layout.position_map.clone();
2591 let editor = self.editor.clone();
2592 let stacking_order = cx.stacking_order().clone();
2593 let interactive_bounds = interactive_bounds.clone();
2594
2595 move |event: &MouseDownEvent, phase, cx| {
2596 if phase == DispatchPhase::Bubble
2597 && interactive_bounds.visibly_contains(&event.position, cx)
2598 {
2599 match event.button {
2600 MouseButton::Left => editor.update(cx, |editor, cx| {
2601 Self::mouse_left_down(
2602 editor,
2603 event,
2604 &position_map,
2605 text_bounds,
2606 gutter_bounds,
2607 &stacking_order,
2608 cx,
2609 );
2610 }),
2611 MouseButton::Right => editor.update(cx, |editor, cx| {
2612 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2613 }),
2614 _ => {}
2615 };
2616 }
2617 }
2618 });
2619
2620 cx.on_mouse_event({
2621 let position_map = layout.position_map.clone();
2622 let editor = self.editor.clone();
2623 let stacking_order = cx.stacking_order().clone();
2624 let interactive_bounds = interactive_bounds.clone();
2625
2626 move |event: &MouseUpEvent, phase, cx| {
2627 if phase == DispatchPhase::Bubble {
2628 editor.update(cx, |editor, cx| {
2629 Self::mouse_up(
2630 editor,
2631 event,
2632 &position_map,
2633 text_bounds,
2634 &interactive_bounds,
2635 &stacking_order,
2636 cx,
2637 )
2638 });
2639 }
2640 }
2641 });
2642 cx.on_mouse_event({
2643 let position_map = layout.position_map.clone();
2644 let editor = self.editor.clone();
2645 let stacking_order = cx.stacking_order().clone();
2646
2647 move |event: &MouseMoveEvent, phase, cx| {
2648 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2649
2650 if phase == DispatchPhase::Bubble {
2651 editor.update(cx, |editor, cx| {
2652 if event.pressed_button == Some(MouseButton::Left) {
2653 Self::mouse_dragged(
2654 editor,
2655 event,
2656 &position_map,
2657 text_bounds,
2658 gutter_bounds,
2659 &stacking_order,
2660 cx,
2661 )
2662 }
2663
2664 if interactive_bounds.visibly_contains(&event.position, cx) {
2665 Self::mouse_moved(
2666 editor,
2667 event,
2668 &position_map,
2669 text_bounds,
2670 gutter_bounds,
2671 &stacking_order,
2672 cx,
2673 )
2674 }
2675 });
2676 }
2677 }
2678 });
2679 }
2680}
2681
2682#[derive(Debug)]
2683pub(crate) struct LineWithInvisibles {
2684 pub line: ShapedLine,
2685 invisibles: Vec<Invisible>,
2686}
2687
2688impl LineWithInvisibles {
2689 fn from_chunks<'a>(
2690 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2691 text_style: &TextStyle,
2692 max_line_len: usize,
2693 max_line_count: usize,
2694 line_number_layouts: &[Option<ShapedLine>],
2695 editor_mode: EditorMode,
2696 cx: &WindowContext,
2697 ) -> Vec<Self> {
2698 let mut layouts = Vec::with_capacity(max_line_count);
2699 let mut line = String::new();
2700 let mut invisibles = Vec::new();
2701 let mut styles = Vec::new();
2702 let mut non_whitespace_added = false;
2703 let mut row = 0;
2704 let mut line_exceeded_max_len = false;
2705 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2706
2707 for highlighted_chunk in chunks.chain([HighlightedChunk {
2708 chunk: "\n",
2709 style: None,
2710 is_tab: false,
2711 }]) {
2712 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2713 if ix > 0 {
2714 let shaped_line = cx
2715 .text_system()
2716 .shape_line(line.clone().into(), font_size, &styles)
2717 .unwrap();
2718 layouts.push(Self {
2719 line: shaped_line,
2720 invisibles: invisibles.drain(..).collect(),
2721 });
2722
2723 line.clear();
2724 styles.clear();
2725 row += 1;
2726 line_exceeded_max_len = false;
2727 non_whitespace_added = false;
2728 if row == max_line_count {
2729 return layouts;
2730 }
2731 }
2732
2733 if !line_chunk.is_empty() && !line_exceeded_max_len {
2734 let text_style = if let Some(style) = highlighted_chunk.style {
2735 Cow::Owned(text_style.clone().highlight(style))
2736 } else {
2737 Cow::Borrowed(text_style)
2738 };
2739
2740 if line.len() + line_chunk.len() > max_line_len {
2741 let mut chunk_len = max_line_len - line.len();
2742 while !line_chunk.is_char_boundary(chunk_len) {
2743 chunk_len -= 1;
2744 }
2745 line_chunk = &line_chunk[..chunk_len];
2746 line_exceeded_max_len = true;
2747 }
2748
2749 styles.push(TextRun {
2750 len: line_chunk.len(),
2751 font: text_style.font(),
2752 color: text_style.color,
2753 background_color: text_style.background_color,
2754 underline: text_style.underline,
2755 });
2756
2757 if editor_mode == EditorMode::Full {
2758 // Line wrap pads its contents with fake whitespaces,
2759 // avoid printing them
2760 let inside_wrapped_string = line_number_layouts
2761 .get(row)
2762 .and_then(|layout| layout.as_ref())
2763 .is_none();
2764 if highlighted_chunk.is_tab {
2765 if non_whitespace_added || !inside_wrapped_string {
2766 invisibles.push(Invisible::Tab {
2767 line_start_offset: line.len(),
2768 });
2769 }
2770 } else {
2771 invisibles.extend(
2772 line_chunk
2773 .chars()
2774 .enumerate()
2775 .filter(|(_, line_char)| {
2776 let is_whitespace = line_char.is_whitespace();
2777 non_whitespace_added |= !is_whitespace;
2778 is_whitespace
2779 && (non_whitespace_added || !inside_wrapped_string)
2780 })
2781 .map(|(whitespace_index, _)| Invisible::Whitespace {
2782 line_offset: line.len() + whitespace_index,
2783 }),
2784 )
2785 }
2786 }
2787
2788 line.push_str(line_chunk);
2789 }
2790 }
2791 }
2792
2793 layouts
2794 }
2795
2796 fn draw(
2797 &self,
2798 layout: &LayoutState,
2799 row: u32,
2800 content_origin: gpui::Point<Pixels>,
2801 whitespace_setting: ShowWhitespaceSetting,
2802 selection_ranges: &[Range<DisplayPoint>],
2803 cx: &mut ElementContext,
2804 ) {
2805 let line_height = layout.position_map.line_height;
2806 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2807
2808 self.line
2809 .paint(
2810 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2811 line_height,
2812 cx,
2813 )
2814 .log_err();
2815
2816 self.draw_invisibles(
2817 &selection_ranges,
2818 layout,
2819 content_origin,
2820 line_y,
2821 row,
2822 line_height,
2823 whitespace_setting,
2824 cx,
2825 );
2826 }
2827
2828 fn draw_invisibles(
2829 &self,
2830 selection_ranges: &[Range<DisplayPoint>],
2831 layout: &LayoutState,
2832 content_origin: gpui::Point<Pixels>,
2833 line_y: Pixels,
2834 row: u32,
2835 line_height: Pixels,
2836 whitespace_setting: ShowWhitespaceSetting,
2837 cx: &mut ElementContext,
2838 ) {
2839 let allowed_invisibles_regions = match whitespace_setting {
2840 ShowWhitespaceSetting::None => return,
2841 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2842 ShowWhitespaceSetting::All => None,
2843 };
2844
2845 for invisible in &self.invisibles {
2846 let (&token_offset, invisible_symbol) = match invisible {
2847 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2848 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2849 };
2850
2851 let x_offset = self.line.x_for_index(token_offset);
2852 let invisible_offset =
2853 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2854 let origin = content_origin
2855 + gpui::point(
2856 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2857 line_y,
2858 );
2859
2860 if let Some(allowed_regions) = allowed_invisibles_regions {
2861 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2862 if !allowed_regions
2863 .iter()
2864 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2865 {
2866 continue;
2867 }
2868 }
2869 invisible_symbol.paint(origin, line_height, cx).log_err();
2870 }
2871 }
2872}
2873
2874#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2875enum Invisible {
2876 Tab { line_start_offset: usize },
2877 Whitespace { line_offset: usize },
2878}
2879
2880impl Element for EditorElement {
2881 type State = ();
2882
2883 fn request_layout(
2884 &mut self,
2885 _element_state: Option<Self::State>,
2886 cx: &mut gpui::ElementContext,
2887 ) -> (gpui::LayoutId, Self::State) {
2888 cx.with_view_id(self.editor.entity_id(), |cx| {
2889 self.editor.update(cx, |editor, cx| {
2890 editor.set_style(self.style.clone(), cx);
2891
2892 let layout_id = match editor.mode {
2893 EditorMode::SingleLine => {
2894 let rem_size = cx.rem_size();
2895 let mut style = Style::default();
2896 style.size.width = relative(1.).into();
2897 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2898 cx.with_element_context(|cx| cx.request_layout(&style, None))
2899 }
2900 EditorMode::AutoHeight { max_lines } => {
2901 let editor_handle = cx.view().clone();
2902 let max_line_number_width =
2903 self.max_line_number_width(&editor.snapshot(cx), cx);
2904 cx.with_element_context(|cx| {
2905 cx.request_measured_layout(
2906 Style::default(),
2907 move |known_dimensions, _, cx| {
2908 editor_handle
2909 .update(cx, |editor, cx| {
2910 compute_auto_height_layout(
2911 editor,
2912 max_lines,
2913 max_line_number_width,
2914 known_dimensions,
2915 cx,
2916 )
2917 })
2918 .unwrap_or_default()
2919 },
2920 )
2921 })
2922 }
2923 EditorMode::Full => {
2924 let mut style = Style::default();
2925 style.size.width = relative(1.).into();
2926 style.size.height = relative(1.).into();
2927 cx.with_element_context(|cx| cx.request_layout(&style, None))
2928 }
2929 };
2930
2931 (layout_id, ())
2932 })
2933 })
2934 }
2935
2936 fn paint(
2937 &mut self,
2938 bounds: Bounds<gpui::Pixels>,
2939 _element_state: &mut Self::State,
2940 cx: &mut gpui::ElementContext,
2941 ) {
2942 let editor = self.editor.clone();
2943
2944 cx.paint_view(self.editor.entity_id(), |cx| {
2945 cx.with_text_style(
2946 Some(gpui::TextStyleRefinement {
2947 font_size: Some(self.style.text.font_size),
2948 line_height: Some(self.style.text.line_height),
2949 ..Default::default()
2950 }),
2951 |cx| {
2952 let mut layout = self.compute_layout(bounds, cx);
2953 let gutter_bounds = Bounds {
2954 origin: bounds.origin,
2955 size: layout.gutter_size,
2956 };
2957 let text_bounds = Bounds {
2958 origin: gutter_bounds.upper_right(),
2959 size: layout.text_size,
2960 };
2961
2962 let focus_handle = editor.focus_handle(cx);
2963 let key_context = self.editor.read(cx).key_context(cx);
2964 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2965 self.register_actions(cx);
2966 self.register_key_listeners(cx);
2967
2968 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2969 cx.handle_input(
2970 &focus_handle,
2971 ElementInputHandler::new(bounds, self.editor.clone()),
2972 );
2973
2974 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2975 if layout.gutter_size.width > Pixels::ZERO {
2976 self.paint_gutter(gutter_bounds, &mut layout, cx);
2977 }
2978 self.paint_text(text_bounds, &mut layout, cx);
2979
2980 cx.with_z_index(0, |cx| {
2981 self.paint_mouse_listeners(
2982 bounds,
2983 gutter_bounds,
2984 text_bounds,
2985 &layout,
2986 cx,
2987 );
2988 });
2989 if !layout.blocks.is_empty() {
2990 cx.with_z_index(0, |cx| {
2991 cx.with_element_id(Some("editor_blocks"), |cx| {
2992 self.paint_blocks(bounds, &mut layout, cx);
2993 });
2994 })
2995 }
2996
2997 cx.with_z_index(1, |cx| {
2998 self.paint_overlays(text_bounds, &mut layout, cx);
2999 });
3000
3001 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
3002 });
3003 })
3004 },
3005 )
3006 })
3007 }
3008}
3009
3010impl IntoElement for EditorElement {
3011 type Element = Self;
3012
3013 fn element_id(&self) -> Option<gpui::ElementId> {
3014 self.editor.element_id()
3015 }
3016
3017 fn into_element(self) -> Self::Element {
3018 self
3019 }
3020}
3021
3022type BufferRow = u32;
3023
3024pub struct LayoutState {
3025 position_map: Arc<PositionMap>,
3026 gutter_size: Size<Pixels>,
3027 gutter_padding: Pixels,
3028 gutter_margin: Pixels,
3029 text_size: gpui::Size<Pixels>,
3030 mode: EditorMode,
3031 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
3032 visible_anchor_range: Range<Anchor>,
3033 visible_display_row_range: Range<u32>,
3034 active_rows: BTreeMap<u32, bool>,
3035 highlighted_rows: Option<Range<u32>>,
3036 line_numbers: Vec<Option<ShapedLine>>,
3037 display_hunks: Vec<DisplayDiffHunk>,
3038 blocks: Vec<BlockLayout>,
3039 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
3040 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
3041 scrollbar_row_range: Range<f32>,
3042 show_scrollbars: bool,
3043 is_singleton: bool,
3044 max_row: u32,
3045 context_menu: Option<(DisplayPoint, AnyElement)>,
3046 code_actions_indicator: Option<CodeActionsIndicator>,
3047 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
3048 fold_indicators: Vec<Option<IconButton>>,
3049 tab_invisible: ShapedLine,
3050 space_invisible: ShapedLine,
3051}
3052
3053struct CodeActionsIndicator {
3054 row: u32,
3055 button: IconButton,
3056}
3057
3058struct PositionMap {
3059 size: Size<Pixels>,
3060 line_height: Pixels,
3061 scroll_position: gpui::Point<Pixels>,
3062 scroll_max: gpui::Point<f32>,
3063 em_width: Pixels,
3064 em_advance: Pixels,
3065 line_layouts: Vec<LineWithInvisibles>,
3066 snapshot: EditorSnapshot,
3067}
3068
3069#[derive(Debug, Copy, Clone)]
3070pub struct PointForPosition {
3071 pub previous_valid: DisplayPoint,
3072 pub next_valid: DisplayPoint,
3073 pub exact_unclipped: DisplayPoint,
3074 pub column_overshoot_after_line_end: u32,
3075}
3076
3077impl PointForPosition {
3078 #[cfg(test)]
3079 pub fn valid(valid: DisplayPoint) -> Self {
3080 Self {
3081 previous_valid: valid,
3082 next_valid: valid,
3083 exact_unclipped: valid,
3084 column_overshoot_after_line_end: 0,
3085 }
3086 }
3087
3088 pub fn as_valid(&self) -> Option<DisplayPoint> {
3089 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
3090 Some(self.previous_valid)
3091 } else {
3092 None
3093 }
3094 }
3095}
3096
3097impl PositionMap {
3098 fn point_for_position(
3099 &self,
3100 text_bounds: Bounds<Pixels>,
3101 position: gpui::Point<Pixels>,
3102 ) -> PointForPosition {
3103 let scroll_position = self.snapshot.scroll_position();
3104 let position = position - text_bounds.origin;
3105 let y = position.y.max(px(0.)).min(self.size.height);
3106 let x = position.x + (scroll_position.x * self.em_width);
3107 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3108
3109 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3110 .line_layouts
3111 .get(row as usize - scroll_position.y as usize)
3112 .map(|&LineWithInvisibles { ref line, .. }| line)
3113 {
3114 if let Some(ix) = line.index_for_x(x) {
3115 (ix as u32, px(0.))
3116 } else {
3117 (line.len as u32, px(0.).max(x - line.width))
3118 }
3119 } else {
3120 (0, x)
3121 };
3122
3123 let mut exact_unclipped = DisplayPoint::new(row, column);
3124 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3125 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3126
3127 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3128 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3129 PointForPosition {
3130 previous_valid,
3131 next_valid,
3132 exact_unclipped,
3133 column_overshoot_after_line_end,
3134 }
3135 }
3136}
3137
3138struct BlockLayout {
3139 row: u32,
3140 element: AnyElement,
3141 available_space: Size<AvailableSpace>,
3142 style: BlockStyle,
3143}
3144
3145fn layout_line(
3146 row: u32,
3147 snapshot: &EditorSnapshot,
3148 style: &EditorStyle,
3149 cx: &WindowContext,
3150) -> Result<ShapedLine> {
3151 let mut line = snapshot.line(row);
3152
3153 if line.len() > MAX_LINE_LEN {
3154 let mut len = MAX_LINE_LEN;
3155 while !line.is_char_boundary(len) {
3156 len -= 1;
3157 }
3158
3159 line.truncate(len);
3160 }
3161
3162 cx.text_system().shape_line(
3163 line.into(),
3164 style.text.font_size.to_pixels(cx.rem_size()),
3165 &[TextRun {
3166 len: snapshot.line_len(row) as usize,
3167 font: style.text.font(),
3168 color: Hsla::default(),
3169 background_color: None,
3170 underline: None,
3171 }],
3172 )
3173}
3174
3175#[derive(Debug)]
3176pub struct Cursor {
3177 origin: gpui::Point<Pixels>,
3178 block_width: Pixels,
3179 line_height: Pixels,
3180 color: Hsla,
3181 shape: CursorShape,
3182 block_text: Option<ShapedLine>,
3183 cursor_name: Option<CursorName>,
3184}
3185
3186#[derive(Debug)]
3187pub struct CursorName {
3188 string: SharedString,
3189 color: Hsla,
3190 is_top_row: bool,
3191 z_index: u16,
3192}
3193
3194impl Cursor {
3195 pub fn new(
3196 origin: gpui::Point<Pixels>,
3197 block_width: Pixels,
3198 line_height: Pixels,
3199 color: Hsla,
3200 shape: CursorShape,
3201 block_text: Option<ShapedLine>,
3202 cursor_name: Option<CursorName>,
3203 ) -> Cursor {
3204 Cursor {
3205 origin,
3206 block_width,
3207 line_height,
3208 color,
3209 shape,
3210 block_text,
3211 cursor_name,
3212 }
3213 }
3214
3215 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3216 Bounds {
3217 origin: self.origin + origin,
3218 size: size(self.block_width, self.line_height),
3219 }
3220 }
3221
3222 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut ElementContext) {
3223 let bounds = match self.shape {
3224 CursorShape::Bar => Bounds {
3225 origin: self.origin + origin,
3226 size: size(px(2.0), self.line_height),
3227 },
3228 CursorShape::Block | CursorShape::Hollow => Bounds {
3229 origin: self.origin + origin,
3230 size: size(self.block_width, self.line_height),
3231 },
3232 CursorShape::Underscore => Bounds {
3233 origin: self.origin
3234 + origin
3235 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3236 size: size(self.block_width, px(2.0)),
3237 },
3238 };
3239
3240 //Draw background or border quad
3241 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3242 outline(bounds, self.color)
3243 } else {
3244 fill(bounds, self.color)
3245 };
3246
3247 if let Some(name) = &self.cursor_name {
3248 let text_size = self.line_height / 1.5;
3249
3250 let name_origin = if name.is_top_row {
3251 point(bounds.right() - px(1.), bounds.top())
3252 } else {
3253 point(bounds.left(), bounds.top() - text_size / 2. - px(1.))
3254 };
3255 cx.with_z_index(name.z_index, |cx| {
3256 div()
3257 .bg(self.color)
3258 .text_size(text_size)
3259 .px_0p5()
3260 .line_height(text_size + px(2.))
3261 .text_color(name.color)
3262 .child(name.string.clone())
3263 .into_any_element()
3264 .draw(
3265 name_origin,
3266 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
3267 cx,
3268 )
3269 })
3270 }
3271
3272 cx.paint_quad(cursor);
3273
3274 if let Some(block_text) = &self.block_text {
3275 block_text
3276 .paint(self.origin + origin, self.line_height, cx)
3277 .log_err();
3278 }
3279 }
3280
3281 pub fn shape(&self) -> CursorShape {
3282 self.shape
3283 }
3284}
3285
3286#[derive(Debug)]
3287pub struct HighlightedRange {
3288 pub start_y: Pixels,
3289 pub line_height: Pixels,
3290 pub lines: Vec<HighlightedRangeLine>,
3291 pub color: Hsla,
3292 pub corner_radius: Pixels,
3293}
3294
3295#[derive(Debug)]
3296pub struct HighlightedRangeLine {
3297 pub start_x: Pixels,
3298 pub end_x: Pixels,
3299}
3300
3301impl HighlightedRange {
3302 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut ElementContext) {
3303 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3304 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3305 self.paint_lines(
3306 self.start_y + self.line_height,
3307 &self.lines[1..],
3308 bounds,
3309 cx,
3310 );
3311 } else {
3312 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3313 }
3314 }
3315
3316 fn paint_lines(
3317 &self,
3318 start_y: Pixels,
3319 lines: &[HighlightedRangeLine],
3320 _bounds: Bounds<Pixels>,
3321 cx: &mut ElementContext,
3322 ) {
3323 if lines.is_empty() {
3324 return;
3325 }
3326
3327 let first_line = lines.first().unwrap();
3328 let last_line = lines.last().unwrap();
3329
3330 let first_top_left = point(first_line.start_x, start_y);
3331 let first_top_right = point(first_line.end_x, start_y);
3332
3333 let curve_height = point(Pixels::ZERO, self.corner_radius);
3334 let curve_width = |start_x: Pixels, end_x: Pixels| {
3335 let max = (end_x - start_x) / 2.;
3336 let width = if max < self.corner_radius {
3337 max
3338 } else {
3339 self.corner_radius
3340 };
3341
3342 point(width, Pixels::ZERO)
3343 };
3344
3345 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3346 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3347 path.curve_to(first_top_right + curve_height, first_top_right);
3348
3349 let mut iter = lines.iter().enumerate().peekable();
3350 while let Some((ix, line)) = iter.next() {
3351 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3352
3353 if let Some((_, next_line)) = iter.peek() {
3354 let next_top_right = point(next_line.end_x, bottom_right.y);
3355
3356 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3357 Ordering::Equal => {
3358 path.line_to(bottom_right);
3359 }
3360 Ordering::Less => {
3361 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3362 path.line_to(bottom_right - curve_height);
3363 if self.corner_radius > Pixels::ZERO {
3364 path.curve_to(bottom_right - curve_width, bottom_right);
3365 }
3366 path.line_to(next_top_right + curve_width);
3367 if self.corner_radius > Pixels::ZERO {
3368 path.curve_to(next_top_right + curve_height, next_top_right);
3369 }
3370 }
3371 Ordering::Greater => {
3372 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3373 path.line_to(bottom_right - curve_height);
3374 if self.corner_radius > Pixels::ZERO {
3375 path.curve_to(bottom_right + curve_width, bottom_right);
3376 }
3377 path.line_to(next_top_right - curve_width);
3378 if self.corner_radius > Pixels::ZERO {
3379 path.curve_to(next_top_right + curve_height, next_top_right);
3380 }
3381 }
3382 }
3383 } else {
3384 let curve_width = curve_width(line.start_x, line.end_x);
3385 path.line_to(bottom_right - curve_height);
3386 if self.corner_radius > Pixels::ZERO {
3387 path.curve_to(bottom_right - curve_width, bottom_right);
3388 }
3389
3390 let bottom_left = point(line.start_x, bottom_right.y);
3391 path.line_to(bottom_left + curve_width);
3392 if self.corner_radius > Pixels::ZERO {
3393 path.curve_to(bottom_left - curve_height, bottom_left);
3394 }
3395 }
3396 }
3397
3398 if first_line.start_x > last_line.start_x {
3399 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3400 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3401 path.line_to(second_top_left + curve_height);
3402 if self.corner_radius > Pixels::ZERO {
3403 path.curve_to(second_top_left + curve_width, second_top_left);
3404 }
3405 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3406 path.line_to(first_bottom_left - curve_width);
3407 if self.corner_radius > Pixels::ZERO {
3408 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3409 }
3410 }
3411
3412 path.line_to(first_top_left + curve_height);
3413 if self.corner_radius > Pixels::ZERO {
3414 path.curve_to(first_top_left + top_curve_width, first_top_left);
3415 }
3416 path.line_to(first_top_right - top_curve_width);
3417
3418 cx.paint_path(path, self.color);
3419 }
3420}
3421
3422pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3423 (delta.pow(1.5) / 100.0).into()
3424}
3425
3426fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3427 (delta.pow(1.2) / 300.0).into()
3428}
3429
3430#[cfg(test)]
3431mod tests {
3432 use super::*;
3433 use crate::{
3434 display_map::{BlockDisposition, BlockProperties},
3435 editor_tests::{init_test, update_test_language_settings},
3436 Editor, MultiBuffer,
3437 };
3438 use gpui::TestAppContext;
3439 use language::language_settings;
3440 use log::info;
3441 use std::{num::NonZeroU32, sync::Arc};
3442 use util::test::sample_text;
3443
3444 #[gpui::test]
3445 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3446 init_test(cx, |_| {});
3447 let window = cx.add_window(|cx| {
3448 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3449 Editor::new(EditorMode::Full, buffer, None, cx)
3450 });
3451
3452 let editor = window.root(cx).unwrap();
3453 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3454 let element = EditorElement::new(&editor, style);
3455
3456 let layouts = window
3457 .update(cx, |editor, cx| {
3458 let snapshot = editor.snapshot(cx);
3459 element
3460 .shape_line_numbers(
3461 0..6,
3462 &Default::default(),
3463 DisplayPoint::new(0, 0),
3464 false,
3465 &snapshot,
3466 cx,
3467 )
3468 .0
3469 })
3470 .unwrap();
3471 assert_eq!(layouts.len(), 6);
3472
3473 let relative_rows = window
3474 .update(cx, |editor, cx| {
3475 let snapshot = editor.snapshot(cx);
3476 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3477 })
3478 .unwrap();
3479 assert_eq!(relative_rows[&0], 3);
3480 assert_eq!(relative_rows[&1], 2);
3481 assert_eq!(relative_rows[&2], 1);
3482 // current line has no relative number
3483 assert_eq!(relative_rows[&4], 1);
3484 assert_eq!(relative_rows[&5], 2);
3485
3486 // works if cursor is before screen
3487 let relative_rows = window
3488 .update(cx, |editor, cx| {
3489 let snapshot = editor.snapshot(cx);
3490
3491 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3492 })
3493 .unwrap();
3494 assert_eq!(relative_rows.len(), 3);
3495 assert_eq!(relative_rows[&3], 2);
3496 assert_eq!(relative_rows[&4], 3);
3497 assert_eq!(relative_rows[&5], 4);
3498
3499 // works if cursor is after screen
3500 let relative_rows = window
3501 .update(cx, |editor, cx| {
3502 let snapshot = editor.snapshot(cx);
3503
3504 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3505 })
3506 .unwrap();
3507 assert_eq!(relative_rows.len(), 3);
3508 assert_eq!(relative_rows[&0], 5);
3509 assert_eq!(relative_rows[&1], 4);
3510 assert_eq!(relative_rows[&2], 3);
3511 }
3512
3513 #[gpui::test]
3514 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3515 init_test(cx, |_| {});
3516
3517 let window = cx.add_window(|cx| {
3518 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3519 Editor::new(EditorMode::Full, buffer, None, cx)
3520 });
3521 let editor = window.root(cx).unwrap();
3522 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3523 let mut element = EditorElement::new(&editor, style);
3524
3525 window
3526 .update(cx, |editor, cx| {
3527 editor.cursor_shape = CursorShape::Block;
3528 editor.change_selections(None, cx, |s| {
3529 s.select_ranges([
3530 Point::new(0, 0)..Point::new(1, 0),
3531 Point::new(3, 2)..Point::new(3, 3),
3532 Point::new(5, 6)..Point::new(6, 0),
3533 ]);
3534 });
3535 })
3536 .unwrap();
3537 let state = cx
3538 .update_window(window.into(), |view, cx| {
3539 cx.with_element_context(|cx| {
3540 cx.with_view_id(view.entity_id(), |cx| {
3541 element.compute_layout(
3542 Bounds {
3543 origin: point(px(500.), px(500.)),
3544 size: size(px(500.), px(500.)),
3545 },
3546 cx,
3547 )
3548 })
3549 })
3550 })
3551 .unwrap();
3552
3553 assert_eq!(state.selections.len(), 1);
3554 let local_selections = &state.selections[0].1;
3555 assert_eq!(local_selections.len(), 3);
3556 // moves cursor back one line
3557 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3558 assert_eq!(
3559 local_selections[0].range,
3560 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3561 );
3562
3563 // moves cursor back one column
3564 assert_eq!(
3565 local_selections[1].range,
3566 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3567 );
3568 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3569
3570 // leaves cursor on the max point
3571 assert_eq!(
3572 local_selections[2].range,
3573 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3574 );
3575 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3576
3577 // active lines does not include 1 (even though the range of the selection does)
3578 assert_eq!(
3579 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3580 vec![0, 3, 5, 6]
3581 );
3582
3583 // multi-buffer support
3584 // in DisplayPoint co-ordinates, this is what we're dealing with:
3585 // 0: [[file
3586 // 1: header]]
3587 // 2: aaaaaa
3588 // 3: bbbbbb
3589 // 4: cccccc
3590 // 5:
3591 // 6: ...
3592 // 7: ffffff
3593 // 8: gggggg
3594 // 9: hhhhhh
3595 // 10:
3596 // 11: [[file
3597 // 12: header]]
3598 // 13: bbbbbb
3599 // 14: cccccc
3600 // 15: dddddd
3601 let window = cx.add_window(|cx| {
3602 let buffer = MultiBuffer::build_multi(
3603 [
3604 (
3605 &(sample_text(8, 6, 'a') + "\n"),
3606 vec![
3607 Point::new(0, 0)..Point::new(3, 0),
3608 Point::new(4, 0)..Point::new(7, 0),
3609 ],
3610 ),
3611 (
3612 &(sample_text(8, 6, 'a') + "\n"),
3613 vec![Point::new(1, 0)..Point::new(3, 0)],
3614 ),
3615 ],
3616 cx,
3617 );
3618 Editor::new(EditorMode::Full, buffer, None, cx)
3619 });
3620 let editor = window.root(cx).unwrap();
3621 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3622 let mut element = EditorElement::new(&editor, style);
3623 let _state = window.update(cx, |editor, cx| {
3624 editor.cursor_shape = CursorShape::Block;
3625 editor.change_selections(None, cx, |s| {
3626 s.select_display_ranges([
3627 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3628 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3629 ]);
3630 });
3631 });
3632
3633 let state = cx
3634 .update_window(window.into(), |view, cx| {
3635 cx.with_element_context(|cx| {
3636 cx.with_view_id(view.entity_id(), |cx| {
3637 element.compute_layout(
3638 Bounds {
3639 origin: point(px(500.), px(500.)),
3640 size: size(px(500.), px(500.)),
3641 },
3642 cx,
3643 )
3644 })
3645 })
3646 })
3647 .unwrap();
3648 assert_eq!(state.selections.len(), 1);
3649 let local_selections = &state.selections[0].1;
3650 assert_eq!(local_selections.len(), 2);
3651
3652 // moves cursor on excerpt boundary back a line
3653 // and doesn't allow selection to bleed through
3654 assert_eq!(
3655 local_selections[0].range,
3656 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3657 );
3658 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3659 // moves cursor on buffer boundary back two lines
3660 // and doesn't allow selection to bleed through
3661 assert_eq!(
3662 local_selections[1].range,
3663 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3664 );
3665 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3666 }
3667
3668 #[gpui::test]
3669 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3670 init_test(cx, |_| {});
3671
3672 let window = cx.add_window(|cx| {
3673 let buffer = MultiBuffer::build_simple("", cx);
3674 Editor::new(EditorMode::Full, buffer, None, cx)
3675 });
3676 let editor = window.root(cx).unwrap();
3677 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3678 window
3679 .update(cx, |editor, cx| {
3680 editor.set_placeholder_text("hello", cx);
3681 editor.insert_blocks(
3682 [BlockProperties {
3683 style: BlockStyle::Fixed,
3684 disposition: BlockDisposition::Above,
3685 height: 3,
3686 position: Anchor::min(),
3687 render: Arc::new(|_| div().into_any()),
3688 }],
3689 None,
3690 cx,
3691 );
3692
3693 // Blur the editor so that it displays placeholder text.
3694 cx.blur();
3695 })
3696 .unwrap();
3697
3698 let mut element = EditorElement::new(&editor, style);
3699 let state = cx
3700 .update_window(window.into(), |view, cx| {
3701 cx.with_element_context(|cx| {
3702 cx.with_view_id(view.entity_id(), |cx| {
3703 element.compute_layout(
3704 Bounds {
3705 origin: point(px(500.), px(500.)),
3706 size: size(px(500.), px(500.)),
3707 },
3708 cx,
3709 )
3710 })
3711 })
3712 })
3713 .unwrap();
3714 let size = state.position_map.size;
3715
3716 assert_eq!(state.position_map.line_layouts.len(), 4);
3717 assert_eq!(
3718 state
3719 .line_numbers
3720 .iter()
3721 .map(Option::is_some)
3722 .collect::<Vec<_>>(),
3723 &[false, false, false, true]
3724 );
3725
3726 // Don't panic.
3727 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3728 cx.update_window(window.into(), |_, cx| {
3729 cx.with_element_context(|cx| element.paint(bounds, &mut (), cx))
3730 })
3731 .unwrap()
3732 }
3733
3734 #[gpui::test]
3735 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3736 const TAB_SIZE: u32 = 4;
3737
3738 let input_text = "\t \t|\t| a b";
3739 let expected_invisibles = vec![
3740 Invisible::Tab {
3741 line_start_offset: 0,
3742 },
3743 Invisible::Whitespace {
3744 line_offset: TAB_SIZE as usize,
3745 },
3746 Invisible::Tab {
3747 line_start_offset: TAB_SIZE as usize + 1,
3748 },
3749 Invisible::Tab {
3750 line_start_offset: TAB_SIZE as usize * 2 + 1,
3751 },
3752 Invisible::Whitespace {
3753 line_offset: TAB_SIZE as usize * 3 + 1,
3754 },
3755 Invisible::Whitespace {
3756 line_offset: TAB_SIZE as usize * 3 + 3,
3757 },
3758 ];
3759 assert_eq!(
3760 expected_invisibles.len(),
3761 input_text
3762 .chars()
3763 .filter(|initial_char| initial_char.is_whitespace())
3764 .count(),
3765 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3766 );
3767
3768 init_test(cx, |s| {
3769 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3770 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3771 });
3772
3773 let actual_invisibles =
3774 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3775
3776 assert_eq!(expected_invisibles, actual_invisibles);
3777 }
3778
3779 #[gpui::test]
3780 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3781 init_test(cx, |s| {
3782 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3783 s.defaults.tab_size = NonZeroU32::new(4);
3784 });
3785
3786 for editor_mode_without_invisibles in [
3787 EditorMode::SingleLine,
3788 EditorMode::AutoHeight { max_lines: 100 },
3789 ] {
3790 let invisibles = collect_invisibles_from_new_editor(
3791 cx,
3792 editor_mode_without_invisibles,
3793 "\t\t\t| | a b",
3794 px(500.0),
3795 );
3796 assert!(invisibles.is_empty(),
3797 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3798 }
3799 }
3800
3801 #[gpui::test]
3802 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3803 let tab_size = 4;
3804 let input_text = "a\tbcd ".repeat(9);
3805 let repeated_invisibles = [
3806 Invisible::Tab {
3807 line_start_offset: 1,
3808 },
3809 Invisible::Whitespace {
3810 line_offset: tab_size as usize + 3,
3811 },
3812 Invisible::Whitespace {
3813 line_offset: tab_size as usize + 4,
3814 },
3815 Invisible::Whitespace {
3816 line_offset: tab_size as usize + 5,
3817 },
3818 ];
3819 let expected_invisibles = std::iter::once(repeated_invisibles)
3820 .cycle()
3821 .take(9)
3822 .flatten()
3823 .collect::<Vec<_>>();
3824 assert_eq!(
3825 expected_invisibles.len(),
3826 input_text
3827 .chars()
3828 .filter(|initial_char| initial_char.is_whitespace())
3829 .count(),
3830 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3831 );
3832 info!("Expected invisibles: {expected_invisibles:?}");
3833
3834 init_test(cx, |_| {});
3835
3836 // Put the same string with repeating whitespace pattern into editors of various size,
3837 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3838 let resize_step = 10.0;
3839 let mut editor_width = 200.0;
3840 while editor_width <= 1000.0 {
3841 update_test_language_settings(cx, |s| {
3842 s.defaults.tab_size = NonZeroU32::new(tab_size);
3843 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3844 s.defaults.preferred_line_length = Some(editor_width as u32);
3845 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3846 });
3847
3848 let actual_invisibles = collect_invisibles_from_new_editor(
3849 cx,
3850 EditorMode::Full,
3851 &input_text,
3852 px(editor_width),
3853 );
3854
3855 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3856 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3857 let mut i = 0;
3858 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3859 i = actual_index;
3860 match expected_invisibles.get(i) {
3861 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3862 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3863 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3864 _ => {
3865 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3866 }
3867 },
3868 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3869 }
3870 }
3871 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3872 assert!(
3873 missing_expected_invisibles.is_empty(),
3874 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3875 );
3876
3877 editor_width += resize_step;
3878 }
3879 }
3880
3881 fn collect_invisibles_from_new_editor(
3882 cx: &mut TestAppContext,
3883 editor_mode: EditorMode,
3884 input_text: &str,
3885 editor_width: Pixels,
3886 ) -> Vec<Invisible> {
3887 info!(
3888 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3889 editor_width.0
3890 );
3891 let window = cx.add_window(|cx| {
3892 let buffer = MultiBuffer::build_simple(&input_text, cx);
3893 Editor::new(editor_mode, buffer, None, cx)
3894 });
3895 let editor = window.root(cx).unwrap();
3896 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3897 let mut element = EditorElement::new(&editor, style);
3898 window
3899 .update(cx, |editor, cx| {
3900 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3901 editor.set_wrap_width(Some(editor_width), cx);
3902 })
3903 .unwrap();
3904 let layout_state = cx
3905 .update_window(window.into(), |_, cx| {
3906 cx.with_element_context(|cx| {
3907 element.compute_layout(
3908 Bounds {
3909 origin: point(px(500.), px(500.)),
3910 size: size(px(500.), px(500.)),
3911 },
3912 cx,
3913 )
3914 })
3915 })
3916 .unwrap();
3917
3918 layout_state
3919 .position_map
3920 .line_layouts
3921 .iter()
3922 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3923 .flatten()
3924 .cloned()
3925 .collect()
3926 }
3927}
3928
3929pub fn register_action<T: Action>(
3930 view: &View<Editor>,
3931 cx: &mut WindowContext,
3932 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3933) {
3934 let view = view.clone();
3935 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3936 let action = action.downcast_ref().unwrap();
3937 if phase == DispatchPhase::Bubble {
3938 view.update(cx, |editor, cx| {
3939 listener(editor, action, cx);
3940 })
3941 }
3942 })
3943}
3944
3945fn compute_auto_height_layout(
3946 editor: &mut Editor,
3947 max_lines: usize,
3948 max_line_number_width: Pixels,
3949 known_dimensions: Size<Option<Pixels>>,
3950 cx: &mut ViewContext<Editor>,
3951) -> Option<Size<Pixels>> {
3952 let width = known_dimensions.width?;
3953 if let Some(height) = known_dimensions.height {
3954 return Some(size(width, height));
3955 }
3956
3957 let style = editor.style.as_ref().unwrap();
3958 let font_id = cx.text_system().resolve_font(&style.text.font());
3959 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3960 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3961 let em_width = cx
3962 .text_system()
3963 .typographic_bounds(font_id, font_size, 'm')
3964 .unwrap()
3965 .size
3966 .width;
3967
3968 let mut snapshot = editor.snapshot(cx);
3969 let gutter_dimensions =
3970 snapshot.gutter_dimensions(font_id, font_size, em_width, max_line_number_width, cx);
3971
3972 editor.gutter_width = gutter_dimensions.width;
3973 let text_width = width - gutter_dimensions.width;
3974 let overscroll = size(em_width, px(0.));
3975
3976 let editor_width = text_width - gutter_dimensions.margin - overscroll.width - em_width;
3977 if editor.set_wrap_width(Some(editor_width), cx) {
3978 snapshot = editor.snapshot(cx);
3979 }
3980
3981 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3982 let height = scroll_height
3983 .max(line_height)
3984 .min(line_height * max_lines as f32);
3985
3986 Some(size(width, height))
3987}