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, DocumentHighlightRead, DocumentHighlightWrite, Editor, EditorMode,
20 EditorSettings, EditorSnapshot, EditorStyle, HalfPageDown, HalfPageUp, HoveredCursor, LineDown,
21 LineUp, OpenExcerpts, PageDown, PageUp, Point, SelectPhase, Selection, SoftWrap, ToPoint,
22 CURSORS_VISIBLE_FOR, MAX_LINE_LEN,
23};
24use anyhow::Result;
25use collections::{BTreeMap, HashMap};
26use git::diff::DiffHunkStatus;
27use gpui::{
28 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
29 AnchorCorner, AnyElement, AvailableSpace, Bounds, ContentMask, Corners, CursorStyle,
30 DispatchPhase, Edges, Element, ElementInputHandler, Entity, Hsla, InteractiveBounds,
31 InteractiveElement, IntoElement, ModifiersChangedEvent, MouseButton, MouseDownEvent,
32 MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, ScrollDelta, ScrollWheelEvent, ShapedLine,
33 SharedString, Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun,
34 TextStyle, View, ViewContext, WindowContext,
35};
36use itertools::Itertools;
37use language::language_settings::ShowWhitespaceSetting;
38use lsp::DiagnosticSeverity;
39use multi_buffer::Anchor;
40use project::{
41 project_settings::{GitGutterSetting, ProjectSettings},
42 ProjectPath,
43};
44use settings::Settings;
45use smallvec::SmallVec;
46use std::{
47 any::TypeId,
48 borrow::Cow,
49 cmp::{self, Ordering},
50 fmt::Write,
51 iter,
52 ops::Range,
53 sync::Arc,
54};
55use sum_tree::Bias;
56use theme::{ActiveTheme, PlayerColor};
57use ui::prelude::*;
58use ui::{h_flex, ButtonLike, ButtonStyle, IconButton, Tooltip};
59use util::ResultExt;
60use workspace::item::Item;
61
62struct SelectionLayout {
63 head: DisplayPoint,
64 cursor_shape: CursorShape,
65 is_newest: bool,
66 is_local: bool,
67 range: Range<DisplayPoint>,
68 active_rows: Range<u32>,
69 user_name: Option<SharedString>,
70}
71
72impl SelectionLayout {
73 fn new<T: ToPoint + ToDisplayPoint + Clone>(
74 selection: Selection<T>,
75 line_mode: bool,
76 cursor_shape: CursorShape,
77 map: &DisplaySnapshot,
78 is_newest: bool,
79 is_local: bool,
80 user_name: Option<SharedString>,
81 ) -> Self {
82 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
83 let display_selection = point_selection.map(|p| p.to_display_point(map));
84 let mut range = display_selection.range();
85 let mut head = display_selection.head();
86 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
87 ..map.next_line_boundary(point_selection.end).1.row();
88
89 // vim visual line mode
90 if line_mode {
91 let point_range = map.expand_to_line(point_selection.range());
92 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
93 }
94
95 // any vim visual mode (including line mode)
96 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
97 if head.column() > 0 {
98 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
99 } else if head.row() > 0 && head != map.max_point() {
100 head = map.clip_point(
101 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
102 Bias::Left,
103 );
104 // updating range.end is a no-op unless you're cursor is
105 // on the newline containing a multi-buffer divider
106 // in which case the clip_point may have moved the head up
107 // an additional row.
108 range.end = DisplayPoint::new(head.row() + 1, 0);
109 active_rows.end = head.row();
110 }
111 }
112
113 Self {
114 head,
115 cursor_shape,
116 is_newest,
117 is_local,
118 range,
119 active_rows,
120 user_name,
121 }
122 }
123}
124
125pub struct EditorElement {
126 editor: View<Editor>,
127 style: EditorStyle,
128}
129
130impl EditorElement {
131 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
132 Self {
133 editor: editor.clone(),
134 style,
135 }
136 }
137
138 fn register_actions(&self, cx: &mut WindowContext) {
139 let view = &self.editor;
140 view.update(cx, |editor, cx| {
141 for action in editor.editor_actions.iter() {
142 (action)(cx)
143 }
144 });
145
146 crate::rust_analyzer_ext::apply_related_actions(view, cx);
147 register_action(view, cx, Editor::move_left);
148 register_action(view, cx, Editor::move_right);
149 register_action(view, cx, Editor::move_down);
150 register_action(view, cx, Editor::move_down_by_lines);
151 register_action(view, cx, Editor::select_down_by_lines);
152 register_action(view, cx, Editor::move_up);
153 register_action(view, cx, Editor::move_up_by_lines);
154 register_action(view, cx, Editor::select_up_by_lines);
155 register_action(view, cx, Editor::cancel);
156 register_action(view, cx, Editor::newline);
157 register_action(view, cx, Editor::newline_above);
158 register_action(view, cx, Editor::newline_below);
159 register_action(view, cx, Editor::backspace);
160 register_action(view, cx, Editor::delete);
161 register_action(view, cx, Editor::tab);
162 register_action(view, cx, Editor::tab_prev);
163 register_action(view, cx, Editor::indent);
164 register_action(view, cx, Editor::outdent);
165 register_action(view, cx, Editor::delete_line);
166 register_action(view, cx, Editor::join_lines);
167 register_action(view, cx, Editor::sort_lines_case_sensitive);
168 register_action(view, cx, Editor::sort_lines_case_insensitive);
169 register_action(view, cx, Editor::reverse_lines);
170 register_action(view, cx, Editor::shuffle_lines);
171 register_action(view, cx, Editor::convert_to_upper_case);
172 register_action(view, cx, Editor::convert_to_lower_case);
173 register_action(view, cx, Editor::convert_to_title_case);
174 register_action(view, cx, Editor::convert_to_snake_case);
175 register_action(view, cx, Editor::convert_to_kebab_case);
176 register_action(view, cx, Editor::convert_to_upper_camel_case);
177 register_action(view, cx, Editor::convert_to_lower_camel_case);
178 register_action(view, cx, Editor::delete_to_previous_word_start);
179 register_action(view, cx, Editor::delete_to_previous_subword_start);
180 register_action(view, cx, Editor::delete_to_next_word_end);
181 register_action(view, cx, Editor::delete_to_next_subword_end);
182 register_action(view, cx, Editor::delete_to_beginning_of_line);
183 register_action(view, cx, Editor::delete_to_end_of_line);
184 register_action(view, cx, Editor::cut_to_end_of_line);
185 register_action(view, cx, Editor::duplicate_line);
186 register_action(view, cx, Editor::move_line_up);
187 register_action(view, cx, Editor::move_line_down);
188 register_action(view, cx, Editor::transpose);
189 register_action(view, cx, Editor::cut);
190 register_action(view, cx, Editor::copy);
191 register_action(view, cx, Editor::paste);
192 register_action(view, cx, Editor::undo);
193 register_action(view, cx, Editor::redo);
194 register_action(view, cx, Editor::move_page_up);
195 register_action(view, cx, Editor::move_page_down);
196 register_action(view, cx, Editor::next_screen);
197 register_action(view, cx, Editor::scroll_cursor_top);
198 register_action(view, cx, Editor::scroll_cursor_center);
199 register_action(view, cx, Editor::scroll_cursor_bottom);
200 register_action(view, cx, |editor, _: &LineDown, cx| {
201 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
202 });
203 register_action(view, cx, |editor, _: &LineUp, cx| {
204 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
205 });
206 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
207 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
208 });
209 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
210 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
211 });
212 register_action(view, cx, |editor, _: &PageDown, cx| {
213 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
214 });
215 register_action(view, cx, |editor, _: &PageUp, cx| {
216 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
217 });
218 register_action(view, cx, Editor::move_to_previous_word_start);
219 register_action(view, cx, Editor::move_to_previous_subword_start);
220 register_action(view, cx, Editor::move_to_next_word_end);
221 register_action(view, cx, Editor::move_to_next_subword_end);
222 register_action(view, cx, Editor::move_to_beginning_of_line);
223 register_action(view, cx, Editor::move_to_end_of_line);
224 register_action(view, cx, Editor::move_to_start_of_paragraph);
225 register_action(view, cx, Editor::move_to_end_of_paragraph);
226 register_action(view, cx, Editor::move_to_beginning);
227 register_action(view, cx, Editor::move_to_end);
228 register_action(view, cx, Editor::select_up);
229 register_action(view, cx, Editor::select_down);
230 register_action(view, cx, Editor::select_left);
231 register_action(view, cx, Editor::select_right);
232 register_action(view, cx, Editor::select_to_previous_word_start);
233 register_action(view, cx, Editor::select_to_previous_subword_start);
234 register_action(view, cx, Editor::select_to_next_word_end);
235 register_action(view, cx, Editor::select_to_next_subword_end);
236 register_action(view, cx, Editor::select_to_beginning_of_line);
237 register_action(view, cx, Editor::select_to_end_of_line);
238 register_action(view, cx, Editor::select_to_start_of_paragraph);
239 register_action(view, cx, Editor::select_to_end_of_paragraph);
240 register_action(view, cx, Editor::select_to_beginning);
241 register_action(view, cx, Editor::select_to_end);
242 register_action(view, cx, Editor::select_all);
243 register_action(view, cx, |editor, action, cx| {
244 editor.select_all_matches(action, cx).log_err();
245 });
246 register_action(view, cx, Editor::select_line);
247 register_action(view, cx, Editor::split_selection_into_lines);
248 register_action(view, cx, Editor::add_selection_above);
249 register_action(view, cx, Editor::add_selection_below);
250 register_action(view, cx, |editor, action, cx| {
251 editor.select_next(action, cx).log_err();
252 });
253 register_action(view, cx, |editor, action, cx| {
254 editor.select_previous(action, cx).log_err();
255 });
256 register_action(view, cx, Editor::toggle_comments);
257 register_action(view, cx, Editor::select_larger_syntax_node);
258 register_action(view, cx, Editor::select_smaller_syntax_node);
259 register_action(view, cx, Editor::move_to_enclosing_bracket);
260 register_action(view, cx, Editor::undo_selection);
261 register_action(view, cx, Editor::redo_selection);
262 register_action(view, cx, Editor::go_to_diagnostic);
263 register_action(view, cx, Editor::go_to_prev_diagnostic);
264 register_action(view, cx, Editor::go_to_hunk);
265 register_action(view, cx, Editor::go_to_prev_hunk);
266 register_action(view, cx, Editor::go_to_definition);
267 register_action(view, cx, Editor::go_to_definition_split);
268 register_action(view, cx, Editor::go_to_type_definition);
269 register_action(view, cx, Editor::go_to_type_definition_split);
270 register_action(view, cx, Editor::fold);
271 register_action(view, cx, Editor::fold_at);
272 register_action(view, cx, Editor::unfold_lines);
273 register_action(view, cx, Editor::unfold_at);
274 register_action(view, cx, Editor::fold_selected_ranges);
275 register_action(view, cx, Editor::show_completions);
276 register_action(view, cx, Editor::toggle_code_actions);
277 register_action(view, cx, Editor::open_excerpts);
278 register_action(view, cx, Editor::toggle_soft_wrap);
279 register_action(view, cx, Editor::toggle_inlay_hints);
280 register_action(view, cx, hover_popover::hover);
281 register_action(view, cx, Editor::reveal_in_finder);
282 register_action(view, cx, Editor::copy_path);
283 register_action(view, cx, Editor::copy_relative_path);
284 register_action(view, cx, Editor::copy_highlight_json);
285 register_action(view, cx, Editor::copy_permalink_to_line);
286 register_action(view, cx, |editor, action, cx| {
287 if let Some(task) = editor.format(action, cx) {
288 task.detach_and_log_err(cx);
289 } else {
290 cx.propagate();
291 }
292 });
293 register_action(view, cx, Editor::restart_language_server);
294 register_action(view, cx, Editor::show_character_palette);
295 register_action(view, cx, |editor, action, cx| {
296 if let Some(task) = editor.confirm_completion(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.confirm_code_action(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.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.confirm_rename(action, cx) {
318 task.detach_and_log_err(cx);
319 } else {
320 cx.propagate();
321 }
322 });
323 register_action(view, cx, |editor, action, cx| {
324 if let Some(task) = editor.find_all_references(action, cx) {
325 task.detach_and_log_err(cx);
326 } else {
327 cx.propagate();
328 }
329 });
330 register_action(view, cx, Editor::next_copilot_suggestion);
331 register_action(view, cx, Editor::previous_copilot_suggestion);
332 register_action(view, cx, Editor::copilot_suggest);
333 register_action(view, cx, Editor::context_menu_first);
334 register_action(view, cx, Editor::context_menu_prev);
335 register_action(view, cx, Editor::context_menu_next);
336 register_action(view, cx, Editor::context_menu_last);
337 register_action(view, cx, Editor::display_cursor_names);
338 }
339
340 fn register_key_listeners(&self, cx: &mut ElementContext) {
341 cx.on_key_event({
342 let editor = self.editor.clone();
343 move |event: &ModifiersChangedEvent, phase, cx| {
344 if phase != DispatchPhase::Bubble {
345 return;
346 }
347
348 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
349 cx.stop_propagation();
350 }
351 }
352 });
353 }
354
355 pub(crate) fn modifiers_changed(
356 editor: &mut Editor,
357 event: &ModifiersChangedEvent,
358 cx: &mut ViewContext<Editor>,
359 ) -> bool {
360 let pending_selection = editor.has_pending_selection();
361
362 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
363 if event.command && !pending_selection {
364 let point = point.clone();
365 let snapshot = editor.snapshot(cx);
366 let kind = point.definition_kind(event.shift);
367
368 show_link_definition(kind, editor, point, snapshot, cx);
369 return false;
370 }
371 }
372
373 {
374 if editor.link_go_to_definition_state.symbol_range.is_some()
375 || !editor.link_go_to_definition_state.definitions.is_empty()
376 {
377 editor.link_go_to_definition_state.symbol_range.take();
378 editor.link_go_to_definition_state.definitions.clear();
379 cx.notify();
380 }
381
382 editor.link_go_to_definition_state.task = None;
383
384 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
385 }
386
387 false
388 }
389
390 fn mouse_left_down(
391 editor: &mut Editor,
392 event: &MouseDownEvent,
393 position_map: &PositionMap,
394 text_bounds: Bounds<Pixels>,
395 gutter_bounds: Bounds<Pixels>,
396 stacking_order: &StackingOrder,
397 cx: &mut ViewContext<Editor>,
398 ) {
399 let mut click_count = event.click_count;
400 let modifiers = event.modifiers;
401
402 if cx.default_prevented() {
403 return;
404 } else if gutter_bounds.contains(&event.position) {
405 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
406 } else if !text_bounds.contains(&event.position) {
407 return;
408 }
409 if !cx.was_top_layer(&event.position, stacking_order) {
410 return;
411 }
412
413 let point_for_position = position_map.point_for_position(text_bounds, event.position);
414 let position = point_for_position.previous_valid;
415 if modifiers.shift && modifiers.alt {
416 editor.select(
417 SelectPhase::BeginColumnar {
418 position,
419 goal_column: point_for_position.exact_unclipped.column(),
420 },
421 cx,
422 );
423 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
424 editor.select(
425 SelectPhase::Extend {
426 position,
427 click_count,
428 },
429 cx,
430 );
431 } else {
432 editor.select(
433 SelectPhase::Begin {
434 position,
435 add: modifiers.alt,
436 click_count,
437 },
438 cx,
439 );
440 }
441
442 cx.stop_propagation();
443 }
444
445 fn mouse_right_down(
446 editor: &mut Editor,
447 event: &MouseDownEvent,
448 position_map: &PositionMap,
449 text_bounds: Bounds<Pixels>,
450 cx: &mut ViewContext<Editor>,
451 ) {
452 if !text_bounds.contains(&event.position) {
453 return;
454 }
455 let point_for_position = position_map.point_for_position(text_bounds, event.position);
456 mouse_context_menu::deploy_context_menu(
457 editor,
458 event.position,
459 point_for_position.previous_valid,
460 cx,
461 );
462 cx.stop_propagation();
463 }
464
465 fn mouse_up(
466 editor: &mut Editor,
467 event: &MouseUpEvent,
468 position_map: &PositionMap,
469 text_bounds: Bounds<Pixels>,
470 interactive_bounds: &InteractiveBounds,
471 stacking_order: &StackingOrder,
472 cx: &mut ViewContext<Editor>,
473 ) {
474 let end_selection = editor.has_pending_selection();
475 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
476
477 if end_selection {
478 editor.select(SelectPhase::End, cx);
479 }
480
481 if interactive_bounds.visibly_contains(&event.position, cx)
482 && !pending_nonempty_selections
483 && event.modifiers.command
484 && text_bounds.contains(&event.position)
485 && cx.was_top_layer(&event.position, stacking_order)
486 {
487 let point = position_map.point_for_position(text_bounds, event.position);
488 let could_be_inlay = point.as_valid().is_none();
489 let split = event.modifiers.alt;
490 if event.modifiers.shift || could_be_inlay {
491 go_to_fetched_type_definition(editor, point, split, cx);
492 } else {
493 go_to_fetched_definition(editor, point, split, cx);
494 }
495
496 cx.stop_propagation();
497 } else if end_selection {
498 cx.stop_propagation();
499 }
500 }
501
502 fn mouse_dragged(
503 editor: &mut Editor,
504 event: &MouseMoveEvent,
505 position_map: &PositionMap,
506 text_bounds: Bounds<Pixels>,
507 _gutter_bounds: Bounds<Pixels>,
508 _stacking_order: &StackingOrder,
509 cx: &mut ViewContext<Editor>,
510 ) {
511 if !editor.has_pending_selection() {
512 return;
513 }
514
515 let point_for_position = position_map.point_for_position(text_bounds, event.position);
516 let mut scroll_delta = gpui::Point::<f32>::default();
517 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
518 let top = text_bounds.origin.y + vertical_margin;
519 let bottom = text_bounds.lower_left().y - vertical_margin;
520 if event.position.y < top {
521 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
522 }
523 if event.position.y > bottom {
524 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
525 }
526
527 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
528 let left = text_bounds.origin.x + horizontal_margin;
529 let right = text_bounds.upper_right().x - horizontal_margin;
530 if event.position.x < left {
531 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
532 }
533 if event.position.x > right {
534 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
535 }
536
537 editor.select(
538 SelectPhase::Update {
539 position: point_for_position.previous_valid,
540 goal_column: point_for_position.exact_unclipped.column(),
541 scroll_delta,
542 },
543 cx,
544 );
545 }
546
547 fn mouse_moved(
548 editor: &mut Editor,
549 event: &MouseMoveEvent,
550 position_map: &PositionMap,
551 text_bounds: Bounds<Pixels>,
552 gutter_bounds: Bounds<Pixels>,
553 stacking_order: &StackingOrder,
554 cx: &mut ViewContext<Editor>,
555 ) {
556 let modifiers = event.modifiers;
557 let text_hovered = text_bounds.contains(&event.position);
558 let gutter_hovered = gutter_bounds.contains(&event.position);
559 let was_top = cx.was_top_layer(&event.position, stacking_order);
560
561 editor.set_gutter_hovered(gutter_hovered, cx);
562
563 // Don't trigger hover popover if mouse is hovering over context menu
564 if text_hovered && was_top {
565 let point_for_position = position_map.point_for_position(text_bounds, event.position);
566
567 match point_for_position.as_valid() {
568 Some(point) => {
569 update_go_to_definition_link(
570 editor,
571 Some(GoToDefinitionTrigger::Text(point)),
572 modifiers.command,
573 modifiers.shift,
574 cx,
575 );
576 hover_at(editor, Some(point), cx);
577 Self::update_visible_cursor(editor, point, position_map, cx);
578 }
579 None => {
580 update_inlay_link_and_hover_points(
581 &position_map.snapshot,
582 point_for_position,
583 editor,
584 modifiers.command,
585 modifiers.shift,
586 cx,
587 );
588 }
589 }
590 } else {
591 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
592 hover_at(editor, None, cx);
593 if gutter_hovered && was_top {
594 cx.stop_propagation();
595 }
596 }
597 }
598
599 fn update_visible_cursor(
600 editor: &mut Editor,
601 point: DisplayPoint,
602 position_map: &PositionMap,
603 cx: &mut ViewContext<Editor>,
604 ) {
605 let snapshot = &position_map.snapshot;
606 let Some(hub) = editor.collaboration_hub() else {
607 return;
608 };
609 let range = DisplayPoint::new(point.row(), point.column().saturating_sub(1))
610 ..DisplayPoint::new(
611 point.row(),
612 (point.column() + 1).min(snapshot.line_len(point.row())),
613 );
614
615 let range = snapshot
616 .buffer_snapshot
617 .anchor_at(range.start.to_point(&snapshot.display_snapshot), Bias::Left)
618 ..snapshot
619 .buffer_snapshot
620 .anchor_at(range.end.to_point(&snapshot.display_snapshot), Bias::Right);
621
622 let Some(selection) = snapshot.remote_selections_in_range(&range, hub, cx).next() else {
623 return;
624 };
625 let key = crate::HoveredCursor {
626 replica_id: selection.replica_id,
627 selection_id: selection.selection.id,
628 };
629 editor.hovered_cursors.insert(
630 key.clone(),
631 cx.spawn(|editor, mut cx| async move {
632 cx.background_executor().timer(CURSORS_VISIBLE_FOR).await;
633 editor
634 .update(&mut cx, |editor, cx| {
635 editor.hovered_cursors.remove(&key);
636 cx.notify();
637 })
638 .ok();
639 }),
640 );
641 cx.notify()
642 }
643
644 fn paint_background(
645 &self,
646 gutter_bounds: Bounds<Pixels>,
647 text_bounds: Bounds<Pixels>,
648 layout: &LayoutState,
649 cx: &mut ElementContext,
650 ) {
651 let bounds = gutter_bounds.union(&text_bounds);
652 let scroll_top =
653 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
654 let gutter_bg = cx.theme().colors().editor_gutter_background;
655 cx.paint_quad(fill(gutter_bounds, gutter_bg));
656 cx.paint_quad(fill(text_bounds, self.style.background));
657
658 if let EditorMode::Full = layout.mode {
659 let mut active_rows = layout.active_rows.iter().peekable();
660 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
661 let mut end_row = *start_row;
662 while active_rows.peek().map_or(false, |r| {
663 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
664 }) {
665 active_rows.next().unwrap();
666 end_row += 1;
667 }
668
669 if !contains_non_empty_selection {
670 let origin = point(
671 bounds.origin.x,
672 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
673 - scroll_top,
674 );
675 let size = size(
676 bounds.size.width,
677 layout.position_map.line_height * (end_row - start_row + 1) as f32,
678 );
679 let active_line_bg = cx.theme().colors().editor_active_line_background;
680 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
681 }
682 }
683
684 if let Some(highlighted_rows) = &layout.highlighted_rows {
685 let origin = point(
686 bounds.origin.x,
687 bounds.origin.y
688 + (layout.position_map.line_height * highlighted_rows.start as f32)
689 - scroll_top,
690 );
691 let size = size(
692 bounds.size.width,
693 layout.position_map.line_height * highlighted_rows.len() as f32,
694 );
695 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
696 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
697 }
698
699 let scroll_left =
700 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
701
702 for (wrap_position, active) in layout.wrap_guides.iter() {
703 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
704 - scroll_left;
705
706 if x < text_bounds.origin.x
707 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
708 {
709 continue;
710 }
711
712 let color = if *active {
713 cx.theme().colors().editor_active_wrap_guide
714 } else {
715 cx.theme().colors().editor_wrap_guide
716 };
717 cx.paint_quad(fill(
718 Bounds {
719 origin: point(x, text_bounds.origin.y),
720 size: size(px(1.), text_bounds.size.height),
721 },
722 color,
723 ));
724 }
725 }
726 }
727
728 fn paint_gutter(
729 &mut self,
730 bounds: Bounds<Pixels>,
731 layout: &mut LayoutState,
732 cx: &mut ElementContext,
733 ) {
734 let line_height = layout.position_map.line_height;
735
736 let scroll_position = layout.position_map.snapshot.scroll_position();
737 let scroll_top = scroll_position.y * line_height;
738
739 let show_gutter = matches!(
740 ProjectSettings::get_global(cx).git.git_gutter,
741 Some(GitGutterSetting::TrackedFiles)
742 );
743
744 if show_gutter {
745 Self::paint_diff_hunks(bounds, layout, cx);
746 }
747
748 for (ix, line) in layout.line_numbers.iter().enumerate() {
749 if let Some(line) = line {
750 let line_origin = bounds.origin
751 + point(
752 bounds.size.width - line.width - layout.gutter_padding,
753 ix as f32 * line_height - (scroll_top % line_height),
754 );
755
756 line.paint(line_origin, line_height, cx).log_err();
757 }
758 }
759
760 cx.with_z_index(1, |cx| {
761 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
762 if let Some(fold_indicator) = fold_indicator {
763 let mut fold_indicator = fold_indicator.into_any_element();
764 let available_space = size(
765 AvailableSpace::MinContent,
766 AvailableSpace::Definite(line_height * 0.55),
767 );
768 let fold_indicator_size = fold_indicator.measure(available_space, cx);
769
770 let position = point(
771 bounds.size.width - layout.gutter_padding,
772 ix as f32 * line_height - (scroll_top % line_height),
773 );
774 let centering_offset = point(
775 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
776 / 2.,
777 (line_height - fold_indicator_size.height) / 2.,
778 );
779 let origin = bounds.origin + position + centering_offset;
780 fold_indicator.draw(origin, available_space, cx);
781 }
782 }
783
784 if let Some(indicator) = layout.code_actions_indicator.take() {
785 let mut button = indicator.button.into_any_element();
786 let available_space = size(
787 AvailableSpace::MinContent,
788 AvailableSpace::Definite(line_height),
789 );
790 let indicator_size = button.measure(available_space, cx);
791
792 let mut x = Pixels::ZERO;
793 let mut y = indicator.row as f32 * line_height - scroll_top;
794 // Center indicator.
795 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
796 y += (line_height - indicator_size.height) / 2.;
797
798 button.draw(bounds.origin + point(x, y), available_space, cx);
799 }
800 });
801 }
802
803 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut ElementContext) {
804 let line_height = layout.position_map.line_height;
805
806 let scroll_position = layout.position_map.snapshot.scroll_position();
807 let scroll_top = scroll_position.y * line_height;
808
809 for hunk in &layout.display_hunks {
810 let (display_row_range, status) = match hunk {
811 //TODO: This rendering is entirely a horrible hack
812 &DisplayDiffHunk::Folded { display_row: row } => {
813 let start_y = row as f32 * line_height - scroll_top;
814 let end_y = start_y + line_height;
815
816 let width = 0.275 * line_height;
817 let highlight_origin = bounds.origin + point(-width, start_y);
818 let highlight_size = size(width * 2., end_y - start_y);
819 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
820 cx.paint_quad(quad(
821 highlight_bounds,
822 Corners::all(1. * line_height),
823 cx.theme().status().modified,
824 Edges::default(),
825 transparent_black(),
826 ));
827
828 continue;
829 }
830
831 DisplayDiffHunk::Unfolded {
832 display_row_range,
833 status,
834 } => (display_row_range, status),
835 };
836
837 let color = match status {
838 DiffHunkStatus::Added => cx.theme().status().created,
839 DiffHunkStatus::Modified => cx.theme().status().modified,
840
841 //TODO: This rendering is entirely a horrible hack
842 DiffHunkStatus::Removed => {
843 let row = display_row_range.start;
844
845 let offset = line_height / 2.;
846 let start_y = row as f32 * line_height - offset - scroll_top;
847 let end_y = start_y + line_height;
848
849 let width = 0.275 * line_height;
850 let highlight_origin = bounds.origin + point(-width, start_y);
851 let highlight_size = size(width * 2., end_y - start_y);
852 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
853 cx.paint_quad(quad(
854 highlight_bounds,
855 Corners::all(1. * line_height),
856 cx.theme().status().deleted,
857 Edges::default(),
858 transparent_black(),
859 ));
860
861 continue;
862 }
863 };
864
865 let start_row = display_row_range.start;
866 let end_row = display_row_range.end;
867 // If we're in a multibuffer, row range span might include an
868 // excerpt header, so if we were to draw the marker straight away,
869 // the hunk might include the rows of that header.
870 // Making the range inclusive doesn't quite cut it, as we rely on the exclusivity for the soft wrap.
871 // Instead, we simply check whether the range we're dealing with includes
872 // any excerpt headers and if so, we stop painting the diff hunk on the first row of that header.
873 let end_row_in_current_excerpt = layout
874 .position_map
875 .snapshot
876 .blocks_in_range(start_row..end_row)
877 .find_map(|(start_row, block)| {
878 if matches!(block, TransformBlock::ExcerptHeader { .. }) {
879 Some(start_row)
880 } else {
881 None
882 }
883 })
884 .unwrap_or(end_row);
885
886 let start_y = start_row as f32 * line_height - scroll_top;
887 let end_y = end_row_in_current_excerpt as f32 * line_height - scroll_top;
888
889 let width = 0.275 * line_height;
890 let highlight_origin = bounds.origin + point(-width, start_y);
891 let highlight_size = size(width * 2., end_y - start_y);
892 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
893 cx.paint_quad(quad(
894 highlight_bounds,
895 Corners::all(0.05 * line_height),
896 color,
897 Edges::default(),
898 transparent_black(),
899 ));
900 }
901 }
902
903 fn paint_text(
904 &mut self,
905 text_bounds: Bounds<Pixels>,
906 layout: &mut LayoutState,
907 cx: &mut ElementContext,
908 ) {
909 let start_row = layout.visible_display_row_range.start;
910 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
911 let line_end_overshoot = 0.15 * layout.position_map.line_height;
912 let whitespace_setting = self
913 .editor
914 .read(cx)
915 .buffer
916 .read(cx)
917 .settings_at(0, cx)
918 .show_whitespaces;
919
920 cx.with_content_mask(
921 Some(ContentMask {
922 bounds: text_bounds,
923 }),
924 |cx| {
925 let interactive_text_bounds = InteractiveBounds {
926 bounds: text_bounds,
927 stacking_order: cx.stacking_order().clone(),
928 };
929 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
930 if self
931 .editor
932 .read(cx)
933 .link_go_to_definition_state
934 .definitions
935 .is_empty()
936 {
937 cx.set_cursor_style(CursorStyle::IBeam);
938 } else {
939 cx.set_cursor_style(CursorStyle::PointingHand);
940 }
941 }
942
943 let fold_corner_radius = 0.15 * layout.position_map.line_height;
944 cx.with_element_id(Some("folds"), |cx| {
945 let snapshot = &layout.position_map.snapshot;
946
947 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
948 let fold_range = fold.range.clone();
949 let display_range = fold.range.start.to_display_point(&snapshot)
950 ..fold.range.end.to_display_point(&snapshot);
951 debug_assert_eq!(display_range.start.row(), display_range.end.row());
952 let row = display_range.start.row();
953 debug_assert!(row < layout.visible_display_row_range.end);
954 let Some(line_layout) = &layout
955 .position_map
956 .line_layouts
957 .get((row - layout.visible_display_row_range.start) as usize)
958 .map(|l| &l.line)
959 else {
960 continue;
961 };
962
963 let start_x = content_origin.x
964 + line_layout.x_for_index(display_range.start.column() as usize)
965 - layout.position_map.scroll_position.x;
966 let start_y = content_origin.y
967 + row as f32 * layout.position_map.line_height
968 - layout.position_map.scroll_position.y;
969 let end_x = content_origin.x
970 + line_layout.x_for_index(display_range.end.column() as usize)
971 - layout.position_map.scroll_position.x;
972
973 let fold_bounds = Bounds {
974 origin: point(start_x, start_y),
975 size: size(end_x - start_x, layout.position_map.line_height),
976 };
977
978 let fold_background = cx.with_z_index(1, |cx| {
979 div()
980 .id(fold.id)
981 .size_full()
982 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
983 .on_click(cx.listener_for(
984 &self.editor,
985 move |editor: &mut Editor, _, cx| {
986 editor.unfold_ranges(
987 [fold_range.start..fold_range.end],
988 true,
989 false,
990 cx,
991 );
992 cx.stop_propagation();
993 },
994 ))
995 .draw_and_update_state(
996 fold_bounds.origin,
997 fold_bounds.size,
998 cx,
999 |fold_element_state, cx| {
1000 if fold_element_state.is_active() {
1001 cx.theme().colors().ghost_element_active
1002 } else if fold_bounds.contains(&cx.mouse_position()) {
1003 cx.theme().colors().ghost_element_hover
1004 } else {
1005 cx.theme().colors().ghost_element_background
1006 }
1007 },
1008 )
1009 });
1010
1011 self.paint_highlighted_range(
1012 display_range.clone(),
1013 fold_background,
1014 fold_corner_radius,
1015 fold_corner_radius * 2.,
1016 layout,
1017 content_origin,
1018 text_bounds,
1019 cx,
1020 );
1021 }
1022 });
1023
1024 for (range, color) in &layout.highlighted_ranges {
1025 self.paint_highlighted_range(
1026 range.clone(),
1027 *color,
1028 Pixels::ZERO,
1029 line_end_overshoot,
1030 layout,
1031 content_origin,
1032 text_bounds,
1033 cx,
1034 );
1035 }
1036
1037 let mut cursors = SmallVec::<[Cursor; 32]>::new();
1038 let corner_radius = 0.15 * layout.position_map.line_height;
1039 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
1040
1041 for (participant_ix, (selection_style, selections)) in
1042 layout.selections.iter().enumerate()
1043 {
1044 for selection in selections.into_iter() {
1045 self.paint_highlighted_range(
1046 selection.range.clone(),
1047 selection_style.selection,
1048 corner_radius,
1049 corner_radius * 2.,
1050 layout,
1051 content_origin,
1052 text_bounds,
1053 cx,
1054 );
1055
1056 if selection.is_local && !selection.range.is_empty() {
1057 invisible_display_ranges.push(selection.range.clone());
1058 }
1059
1060 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1061 let cursor_position = selection.head;
1062 if layout
1063 .visible_display_row_range
1064 .contains(&cursor_position.row())
1065 {
1066 let cursor_row_layout = &layout.position_map.line_layouts
1067 [(cursor_position.row() - start_row) as usize]
1068 .line;
1069 let cursor_column = cursor_position.column() as usize;
1070
1071 let cursor_character_x =
1072 cursor_row_layout.x_for_index(cursor_column);
1073 let mut block_width = cursor_row_layout
1074 .x_for_index(cursor_column + 1)
1075 - cursor_character_x;
1076 if block_width == Pixels::ZERO {
1077 block_width = layout.position_map.em_width;
1078 }
1079 let block_text = if let CursorShape::Block = selection.cursor_shape
1080 {
1081 layout
1082 .position_map
1083 .snapshot
1084 .chars_at(cursor_position)
1085 .next()
1086 .and_then(|(character, _)| {
1087 let text = if character == '\n' {
1088 SharedString::from(" ")
1089 } else {
1090 SharedString::from(character.to_string())
1091 };
1092 let len = text.len();
1093 cx.text_system()
1094 .shape_line(
1095 text,
1096 cursor_row_layout.font_size,
1097 &[TextRun {
1098 len,
1099 font: self.style.text.font(),
1100 color: self.style.background,
1101 background_color: None,
1102 underline: None,
1103 }],
1104 )
1105 .log_err()
1106 })
1107 } else {
1108 None
1109 };
1110
1111 let x = cursor_character_x - layout.position_map.scroll_position.x;
1112 let y = cursor_position.row() as f32
1113 * layout.position_map.line_height
1114 - layout.position_map.scroll_position.y;
1115 if selection.is_newest {
1116 self.editor.update(cx, |editor, _| {
1117 editor.pixel_position_of_newest_cursor = Some(point(
1118 text_bounds.origin.x + x + block_width / 2.,
1119 text_bounds.origin.y
1120 + y
1121 + layout.position_map.line_height / 2.,
1122 ))
1123 });
1124 }
1125
1126 cursors.push(Cursor {
1127 color: selection_style.cursor,
1128 block_width,
1129 origin: point(x, y),
1130 line_height: layout.position_map.line_height,
1131 shape: selection.cursor_shape,
1132 block_text,
1133 cursor_name: selection.user_name.clone().map(|name| {
1134 CursorName {
1135 string: name,
1136 color: self.style.background,
1137 is_top_row: cursor_position.row() == 0,
1138 z_index: (participant_ix % 256).try_into().unwrap(),
1139 }
1140 }),
1141 });
1142 }
1143 }
1144 }
1145 }
1146
1147 for (ix, line_with_invisibles) in
1148 layout.position_map.line_layouts.iter().enumerate()
1149 {
1150 let row = start_row + ix as u32;
1151 line_with_invisibles.draw(
1152 layout,
1153 row,
1154 content_origin,
1155 whitespace_setting,
1156 &invisible_display_ranges,
1157 cx,
1158 )
1159 }
1160
1161 cx.with_z_index(0, |cx| self.paint_redactions(text_bounds, &layout, cx));
1162
1163 cx.with_z_index(1, |cx| {
1164 for cursor in cursors {
1165 cursor.paint(content_origin, cx);
1166 }
1167 });
1168 },
1169 )
1170 }
1171
1172 fn paint_redactions(
1173 &mut self,
1174 text_bounds: Bounds<Pixels>,
1175 layout: &LayoutState,
1176 cx: &mut ElementContext,
1177 ) {
1178 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1179 let line_end_overshoot = layout.line_end_overshoot();
1180
1181 // A softer than perfect black
1182 let redaction_color = gpui::rgb(0x0e1111);
1183
1184 for range in layout.redacted_ranges.iter() {
1185 self.paint_highlighted_range(
1186 range.clone(),
1187 redaction_color.into(),
1188 Pixels::ZERO,
1189 line_end_overshoot,
1190 layout,
1191 content_origin,
1192 text_bounds,
1193 cx,
1194 );
1195 }
1196 }
1197
1198 fn paint_overlays(
1199 &mut self,
1200 text_bounds: Bounds<Pixels>,
1201 layout: &mut LayoutState,
1202 cx: &mut ElementContext,
1203 ) {
1204 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1205 let start_row = layout.visible_display_row_range.start;
1206 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1207 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1208 let context_menu_size = context_menu.measure(available_space, cx);
1209
1210 let cursor_row_layout =
1211 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1212 let x = cursor_row_layout.x_for_index(position.column() as usize)
1213 - layout.position_map.scroll_position.x;
1214 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1215 - layout.position_map.scroll_position.y;
1216 let mut list_origin = content_origin + point(x, y);
1217 let list_width = context_menu_size.width;
1218 let list_height = context_menu_size.height;
1219
1220 // Snap the right edge of the list to the right edge of the window if
1221 // its horizontal bounds overflow.
1222 if list_origin.x + list_width > cx.viewport_size().width {
1223 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1224 }
1225
1226 if list_origin.y + list_height > text_bounds.lower_right().y {
1227 list_origin.y -= layout.position_map.line_height + list_height;
1228 }
1229
1230 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1231 }
1232
1233 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1234 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1235
1236 // This is safe because we check on layout whether the required row is available
1237 let hovered_row_layout =
1238 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1239
1240 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1241 // height. This is the size we will use to decide whether to render popovers above or below
1242 // the hovered line.
1243 let first_size = hover_popovers[0].measure(available_space, cx);
1244 let height_to_reserve =
1245 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1246
1247 // Compute Hovered Point
1248 let x = hovered_row_layout.x_for_index(position.column() as usize)
1249 - layout.position_map.scroll_position.x;
1250 let y = position.row() as f32 * layout.position_map.line_height
1251 - layout.position_map.scroll_position.y;
1252 let hovered_point = content_origin + point(x, y);
1253
1254 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1255 // There is enough space above. Render popovers above the hovered point
1256 let mut current_y = hovered_point.y;
1257 for mut hover_popover in hover_popovers {
1258 let size = hover_popover.measure(available_space, cx);
1259 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1260
1261 let x_out_of_bounds =
1262 text_bounds.upper_right().x - (popover_origin.x + size.width);
1263 if x_out_of_bounds < Pixels::ZERO {
1264 popover_origin.x = popover_origin.x + x_out_of_bounds;
1265 }
1266
1267 if cx.was_top_layer(&popover_origin, cx.stacking_order()) {
1268 cx.break_content_mask(|cx| {
1269 hover_popover.draw(popover_origin, available_space, cx)
1270 });
1271 }
1272
1273 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1274 }
1275 } else {
1276 // There is not enough space above. Render popovers below the hovered point
1277 let mut current_y = hovered_point.y + layout.position_map.line_height;
1278 for mut hover_popover in hover_popovers {
1279 let size = hover_popover.measure(available_space, cx);
1280 let mut popover_origin = point(hovered_point.x, current_y);
1281
1282 let x_out_of_bounds =
1283 text_bounds.upper_right().x - (popover_origin.x + size.width);
1284 if x_out_of_bounds < Pixels::ZERO {
1285 popover_origin.x = popover_origin.x + x_out_of_bounds;
1286 }
1287
1288 hover_popover.draw(popover_origin, available_space, cx);
1289
1290 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1291 }
1292 }
1293 }
1294
1295 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1296 let element = overlay()
1297 .position(mouse_context_menu.position)
1298 .child(mouse_context_menu.context_menu.clone())
1299 .anchor(AnchorCorner::TopLeft)
1300 .snap_to_window();
1301 element.into_any().draw(
1302 gpui::Point::default(),
1303 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1304 cx,
1305 );
1306 }
1307 }
1308
1309 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1310 bounds.upper_right().x - self.style.scrollbar_width
1311 }
1312
1313 fn paint_scrollbar(
1314 &mut self,
1315 bounds: Bounds<Pixels>,
1316 layout: &mut LayoutState,
1317 cx: &mut ElementContext,
1318 ) {
1319 if layout.mode != EditorMode::Full {
1320 return;
1321 }
1322
1323 // If a drag took place after we started dragging the scrollbar,
1324 // cancel the scrollbar drag.
1325 if cx.has_active_drag() {
1326 self.editor.update(cx, |editor, cx| {
1327 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1328 });
1329 }
1330
1331 let top = bounds.origin.y;
1332 let bottom = bounds.lower_left().y;
1333 let right = bounds.lower_right().x;
1334 let left = self.scrollbar_left(&bounds);
1335 let row_range = layout.scrollbar_row_range.clone();
1336 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1337
1338 let mut height = bounds.size.height;
1339 let mut first_row_y_offset = px(0.0);
1340
1341 // Impose a minimum height on the scrollbar thumb
1342 let row_height = height / max_row;
1343 let min_thumb_height = layout.position_map.line_height;
1344 let thumb_height = (row_range.end - row_range.start) * row_height;
1345 if thumb_height < min_thumb_height {
1346 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1347 height -= min_thumb_height - thumb_height;
1348 }
1349
1350 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1351
1352 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1353 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1354 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1355 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1356
1357 if layout.show_scrollbars {
1358 cx.paint_quad(quad(
1359 track_bounds,
1360 Corners::default(),
1361 cx.theme().colors().scrollbar_track_background,
1362 Edges {
1363 top: Pixels::ZERO,
1364 right: Pixels::ZERO,
1365 bottom: Pixels::ZERO,
1366 left: px(1.),
1367 },
1368 cx.theme().colors().scrollbar_track_border,
1369 ));
1370 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1371 if layout.is_singleton && scrollbar_settings.selections {
1372 let start_anchor = Anchor::min();
1373 let end_anchor = Anchor::max();
1374 let background_ranges = self
1375 .editor
1376 .read(cx)
1377 .background_highlight_row_ranges::<BufferSearchHighlights>(
1378 start_anchor..end_anchor,
1379 &layout.position_map.snapshot,
1380 50000,
1381 );
1382 for range in background_ranges {
1383 let start_y = y_for_row(range.start().row() as f32);
1384 let mut end_y = y_for_row(range.end().row() as f32);
1385 if end_y - start_y < px(1.) {
1386 end_y = start_y + px(1.);
1387 }
1388 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1389 cx.paint_quad(quad(
1390 bounds,
1391 Corners::default(),
1392 cx.theme().status().info,
1393 Edges {
1394 top: Pixels::ZERO,
1395 right: px(1.),
1396 bottom: Pixels::ZERO,
1397 left: px(1.),
1398 },
1399 cx.theme().colors().scrollbar_thumb_border,
1400 ));
1401 }
1402 }
1403
1404 if layout.is_singleton && scrollbar_settings.symbols_selections {
1405 let selection_ranges = self.editor.read(cx).background_highlights_in_range(
1406 Anchor::min()..Anchor::max(),
1407 &layout.position_map.snapshot,
1408 cx.theme().colors(),
1409 );
1410 for hunk in selection_ranges {
1411 let start_display = Point::new(hunk.0.start.row(), 0)
1412 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1413 let end_display = Point::new(hunk.0.end.row(), 0)
1414 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1415 let start_y = y_for_row(start_display.row() as f32);
1416 let mut end_y = if hunk.0.start == hunk.0.end {
1417 y_for_row((end_display.row() + 1) as f32)
1418 } else {
1419 y_for_row((end_display.row()) as f32)
1420 };
1421
1422 if end_y - start_y < px(1.) {
1423 end_y = start_y + px(1.);
1424 }
1425 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1426
1427 cx.paint_quad(quad(
1428 bounds,
1429 Corners::default(),
1430 cx.theme().status().info,
1431 Edges {
1432 top: Pixels::ZERO,
1433 right: px(1.),
1434 bottom: Pixels::ZERO,
1435 left: px(1.),
1436 },
1437 cx.theme().colors().scrollbar_thumb_border,
1438 ));
1439 }
1440 }
1441
1442 if layout.is_singleton && scrollbar_settings.git_diff {
1443 for hunk in layout
1444 .position_map
1445 .snapshot
1446 .buffer_snapshot
1447 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1448 {
1449 let start_display = Point::new(hunk.buffer_range.start, 0)
1450 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1451 let end_display = Point::new(hunk.buffer_range.end, 0)
1452 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1453 let start_y = y_for_row(start_display.row() as f32);
1454 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1455 y_for_row((end_display.row() + 1) as f32)
1456 } else {
1457 y_for_row((end_display.row()) as f32)
1458 };
1459
1460 if end_y - start_y < px(1.) {
1461 end_y = start_y + px(1.);
1462 }
1463 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1464
1465 let color = match hunk.status() {
1466 DiffHunkStatus::Added => cx.theme().status().created,
1467 DiffHunkStatus::Modified => cx.theme().status().modified,
1468 DiffHunkStatus::Removed => cx.theme().status().deleted,
1469 };
1470 cx.paint_quad(quad(
1471 bounds,
1472 Corners::default(),
1473 color,
1474 Edges {
1475 top: Pixels::ZERO,
1476 right: px(1.),
1477 bottom: Pixels::ZERO,
1478 left: px(1.),
1479 },
1480 cx.theme().colors().scrollbar_thumb_border,
1481 ));
1482 }
1483 }
1484
1485 if layout.is_singleton && scrollbar_settings.diagnostics {
1486 let max_point = layout
1487 .position_map
1488 .snapshot
1489 .display_snapshot
1490 .buffer_snapshot
1491 .max_point();
1492
1493 let diagnostics = layout
1494 .position_map
1495 .snapshot
1496 .buffer_snapshot
1497 .diagnostics_in_range::<_, Point>(Point::zero()..max_point, false)
1498 // We want to sort by severity, in order to paint the most severe diagnostics last.
1499 .sorted_by_key(|diagnostic| std::cmp::Reverse(diagnostic.diagnostic.severity));
1500
1501 for diagnostic in diagnostics {
1502 let start_display = diagnostic
1503 .range
1504 .start
1505 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1506 let end_display = diagnostic
1507 .range
1508 .end
1509 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1510 let start_y = y_for_row(start_display.row() as f32);
1511 let mut end_y = if diagnostic.range.start == diagnostic.range.end {
1512 y_for_row((end_display.row() + 1) as f32)
1513 } else {
1514 y_for_row((end_display.row()) as f32)
1515 };
1516
1517 if end_y - start_y < px(1.) {
1518 end_y = start_y + px(1.);
1519 }
1520 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1521
1522 let color = match diagnostic.diagnostic.severity {
1523 DiagnosticSeverity::ERROR => cx.theme().status().error,
1524 DiagnosticSeverity::WARNING => cx.theme().status().warning,
1525 DiagnosticSeverity::INFORMATION => cx.theme().status().info,
1526 _ => cx.theme().status().hint,
1527 };
1528 cx.paint_quad(quad(
1529 bounds,
1530 Corners::default(),
1531 color,
1532 Edges {
1533 top: Pixels::ZERO,
1534 right: px(1.),
1535 bottom: Pixels::ZERO,
1536 left: px(1.),
1537 },
1538 cx.theme().colors().scrollbar_thumb_border,
1539 ));
1540 }
1541 }
1542
1543 cx.paint_quad(quad(
1544 thumb_bounds,
1545 Corners::default(),
1546 cx.theme().colors().scrollbar_thumb_background,
1547 Edges {
1548 top: Pixels::ZERO,
1549 right: px(1.),
1550 bottom: Pixels::ZERO,
1551 left: px(1.),
1552 },
1553 cx.theme().colors().scrollbar_thumb_border,
1554 ));
1555 }
1556
1557 let interactive_track_bounds = InteractiveBounds {
1558 bounds: track_bounds,
1559 stacking_order: cx.stacking_order().clone(),
1560 };
1561 let mut mouse_position = cx.mouse_position();
1562 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1563 cx.set_cursor_style(CursorStyle::Arrow);
1564 }
1565
1566 cx.on_mouse_event({
1567 let editor = self.editor.clone();
1568 move |event: &MouseMoveEvent, phase, cx| {
1569 if phase == DispatchPhase::Capture {
1570 return;
1571 }
1572
1573 editor.update(cx, |editor, cx| {
1574 if event.pressed_button == Some(MouseButton::Left)
1575 && editor.scroll_manager.is_dragging_scrollbar()
1576 {
1577 let y = mouse_position.y;
1578 let new_y = event.position.y;
1579 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1580 let mut position = editor.scroll_position(cx);
1581 position.y += (new_y - y) * (max_row as f32) / height;
1582 if position.y < 0.0 {
1583 position.y = 0.0;
1584 }
1585 editor.set_scroll_position(position, cx);
1586 }
1587
1588 mouse_position = event.position;
1589 cx.stop_propagation();
1590 } else {
1591 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1592 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1593 editor.scroll_manager.show_scrollbar(cx);
1594 }
1595 }
1596 })
1597 }
1598 });
1599
1600 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1601 cx.on_mouse_event({
1602 let editor = self.editor.clone();
1603 move |_: &MouseUpEvent, phase, cx| {
1604 if phase == DispatchPhase::Capture {
1605 return;
1606 }
1607
1608 editor.update(cx, |editor, cx| {
1609 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1610 cx.stop_propagation();
1611 });
1612 }
1613 });
1614 } else {
1615 cx.on_mouse_event({
1616 let editor = self.editor.clone();
1617 move |event: &MouseDownEvent, phase, cx| {
1618 if phase == DispatchPhase::Capture {
1619 return;
1620 }
1621
1622 editor.update(cx, |editor, cx| {
1623 if track_bounds.contains(&event.position) {
1624 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1625
1626 let y = event.position.y;
1627 if y < thumb_top || thumb_bottom < y {
1628 let center_row =
1629 ((y - top) * max_row as f32 / height).round() as u32;
1630 let top_row = center_row
1631 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1632 let mut position = editor.scroll_position(cx);
1633 position.y = top_row as f32;
1634 editor.set_scroll_position(position, cx);
1635 } else {
1636 editor.scroll_manager.show_scrollbar(cx);
1637 }
1638
1639 cx.stop_propagation();
1640 }
1641 });
1642 }
1643 });
1644 }
1645 }
1646
1647 #[allow(clippy::too_many_arguments)]
1648 fn paint_highlighted_range(
1649 &self,
1650 range: Range<DisplayPoint>,
1651 color: Hsla,
1652 corner_radius: Pixels,
1653 line_end_overshoot: Pixels,
1654 layout: &LayoutState,
1655 content_origin: gpui::Point<Pixels>,
1656 bounds: Bounds<Pixels>,
1657 cx: &mut ElementContext,
1658 ) {
1659 let start_row = layout.visible_display_row_range.start;
1660 let end_row = layout.visible_display_row_range.end;
1661 if range.start != range.end {
1662 let row_range = if range.end.column() == 0 {
1663 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1664 } else {
1665 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1666 };
1667
1668 let highlighted_range = HighlightedRange {
1669 color,
1670 line_height: layout.position_map.line_height,
1671 corner_radius,
1672 start_y: content_origin.y
1673 + row_range.start as f32 * layout.position_map.line_height
1674 - layout.position_map.scroll_position.y,
1675 lines: row_range
1676 .into_iter()
1677 .map(|row| {
1678 let line_layout =
1679 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1680 HighlightedRangeLine {
1681 start_x: if row == range.start.row() {
1682 content_origin.x
1683 + line_layout.x_for_index(range.start.column() as usize)
1684 - layout.position_map.scroll_position.x
1685 } else {
1686 content_origin.x - layout.position_map.scroll_position.x
1687 },
1688 end_x: if row == range.end.row() {
1689 content_origin.x
1690 + line_layout.x_for_index(range.end.column() as usize)
1691 - layout.position_map.scroll_position.x
1692 } else {
1693 content_origin.x + line_layout.width + line_end_overshoot
1694 - layout.position_map.scroll_position.x
1695 },
1696 }
1697 })
1698 .collect(),
1699 };
1700
1701 highlighted_range.paint(bounds, cx);
1702 }
1703 }
1704
1705 fn paint_blocks(
1706 &mut self,
1707 bounds: Bounds<Pixels>,
1708 layout: &mut LayoutState,
1709 cx: &mut ElementContext,
1710 ) {
1711 let scroll_position = layout.position_map.snapshot.scroll_position();
1712 let scroll_left = scroll_position.x * layout.position_map.em_width;
1713 let scroll_top = scroll_position.y * layout.position_map.line_height;
1714
1715 for mut block in layout.blocks.drain(..) {
1716 let mut origin = bounds.origin
1717 + point(
1718 Pixels::ZERO,
1719 block.row as f32 * layout.position_map.line_height - scroll_top,
1720 );
1721 if !matches!(block.style, BlockStyle::Sticky) {
1722 origin += point(-scroll_left, Pixels::ZERO);
1723 }
1724 block.element.draw(origin, block.available_space, cx);
1725 }
1726 }
1727
1728 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1729 let style = &self.style;
1730 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1731 let layout = cx
1732 .text_system()
1733 .shape_line(
1734 SharedString::from(" ".repeat(column)),
1735 font_size,
1736 &[TextRun {
1737 len: column,
1738 font: style.text.font(),
1739 color: Hsla::default(),
1740 background_color: None,
1741 underline: None,
1742 }],
1743 )
1744 .unwrap();
1745
1746 layout.width
1747 }
1748
1749 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1750 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1751 self.column_pixels(digit_count, cx)
1752 }
1753
1754 //Folds contained in a hunk are ignored apart from shrinking visual size
1755 //If a fold contains any hunks then that fold line is marked as modified
1756 fn layout_git_gutters(
1757 &self,
1758 display_rows: Range<u32>,
1759 snapshot: &EditorSnapshot,
1760 ) -> Vec<DisplayDiffHunk> {
1761 let buffer_snapshot = &snapshot.buffer_snapshot;
1762
1763 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1764 .to_point(snapshot)
1765 .row;
1766 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1767 .to_point(snapshot)
1768 .row;
1769
1770 buffer_snapshot
1771 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1772 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1773 .dedup()
1774 .collect()
1775 }
1776
1777 fn calculate_relative_line_numbers(
1778 &self,
1779 snapshot: &EditorSnapshot,
1780 rows: &Range<u32>,
1781 relative_to: Option<u32>,
1782 ) -> HashMap<u32, u32> {
1783 let mut relative_rows: HashMap<u32, u32> = Default::default();
1784 let Some(relative_to) = relative_to else {
1785 return relative_rows;
1786 };
1787
1788 let start = rows.start.min(relative_to);
1789 let end = rows.end.max(relative_to);
1790
1791 let buffer_rows = snapshot
1792 .buffer_rows(start)
1793 .take(1 + (end - start) as usize)
1794 .collect::<Vec<_>>();
1795
1796 let head_idx = relative_to - start;
1797 let mut delta = 1;
1798 let mut i = head_idx + 1;
1799 while i < buffer_rows.len() as u32 {
1800 if buffer_rows[i as usize].is_some() {
1801 if rows.contains(&(i + start)) {
1802 relative_rows.insert(i + start, delta);
1803 }
1804 delta += 1;
1805 }
1806 i += 1;
1807 }
1808 delta = 1;
1809 i = head_idx.min(buffer_rows.len() as u32 - 1);
1810 while i > 0 && buffer_rows[i as usize].is_none() {
1811 i -= 1;
1812 }
1813
1814 while i > 0 {
1815 i -= 1;
1816 if buffer_rows[i as usize].is_some() {
1817 if rows.contains(&(i + start)) {
1818 relative_rows.insert(i + start, delta);
1819 }
1820 delta += 1;
1821 }
1822 }
1823
1824 relative_rows
1825 }
1826
1827 fn shape_line_numbers(
1828 &self,
1829 rows: Range<u32>,
1830 active_rows: &BTreeMap<u32, bool>,
1831 newest_selection_head: DisplayPoint,
1832 is_singleton: bool,
1833 snapshot: &EditorSnapshot,
1834 cx: &ViewContext<Editor>,
1835 ) -> (
1836 Vec<Option<ShapedLine>>,
1837 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1838 ) {
1839 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1840 let include_line_numbers = snapshot.mode == EditorMode::Full;
1841 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1842 let mut fold_statuses = Vec::with_capacity(rows.len());
1843 let mut line_number = String::new();
1844 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1845 let relative_to = if is_relative {
1846 Some(newest_selection_head.row())
1847 } else {
1848 None
1849 };
1850
1851 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1852
1853 for (ix, row) in snapshot
1854 .buffer_rows(rows.start)
1855 .take((rows.end - rows.start) as usize)
1856 .enumerate()
1857 {
1858 let display_row = rows.start + ix as u32;
1859 let (active, color) = if active_rows.contains_key(&display_row) {
1860 (true, cx.theme().colors().editor_active_line_number)
1861 } else {
1862 (false, cx.theme().colors().editor_line_number)
1863 };
1864 if let Some(buffer_row) = row {
1865 if include_line_numbers {
1866 line_number.clear();
1867 let default_number = buffer_row + 1;
1868 let number = relative_rows
1869 .get(&(ix as u32 + rows.start))
1870 .unwrap_or(&default_number);
1871 write!(&mut line_number, "{}", number).unwrap();
1872 let run = TextRun {
1873 len: line_number.len(),
1874 font: self.style.text.font(),
1875 color,
1876 background_color: None,
1877 underline: None,
1878 };
1879 let shaped_line = cx
1880 .text_system()
1881 .shape_line(line_number.clone().into(), font_size, &[run])
1882 .unwrap();
1883 shaped_line_numbers.push(Some(shaped_line));
1884 fold_statuses.push(
1885 is_singleton
1886 .then(|| {
1887 snapshot
1888 .fold_for_line(buffer_row)
1889 .map(|fold_status| (fold_status, buffer_row, active))
1890 })
1891 .flatten(),
1892 )
1893 }
1894 } else {
1895 fold_statuses.push(None);
1896 shaped_line_numbers.push(None);
1897 }
1898 }
1899
1900 (shaped_line_numbers, fold_statuses)
1901 }
1902
1903 fn layout_lines(
1904 &self,
1905 rows: Range<u32>,
1906 line_number_layouts: &[Option<ShapedLine>],
1907 snapshot: &EditorSnapshot,
1908 cx: &ViewContext<Editor>,
1909 ) -> Vec<LineWithInvisibles> {
1910 if rows.start >= rows.end {
1911 return Vec::new();
1912 }
1913
1914 // Show the placeholder when the editor is empty
1915 if snapshot.is_empty() {
1916 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1917 let placeholder_color = cx.theme().colors().text_placeholder;
1918 let placeholder_text = snapshot.placeholder_text();
1919
1920 let placeholder_lines = placeholder_text
1921 .as_ref()
1922 .map_or("", AsRef::as_ref)
1923 .split('\n')
1924 .skip(rows.start as usize)
1925 .chain(iter::repeat(""))
1926 .take(rows.len());
1927 placeholder_lines
1928 .filter_map(move |line| {
1929 let run = TextRun {
1930 len: line.len(),
1931 font: self.style.text.font(),
1932 color: placeholder_color,
1933 background_color: None,
1934 underline: Default::default(),
1935 };
1936 cx.text_system()
1937 .shape_line(line.to_string().into(), font_size, &[run])
1938 .log_err()
1939 })
1940 .map(|line| LineWithInvisibles {
1941 line,
1942 invisibles: Vec::new(),
1943 })
1944 .collect()
1945 } else {
1946 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1947 LineWithInvisibles::from_chunks(
1948 chunks,
1949 &self.style.text,
1950 MAX_LINE_LEN,
1951 rows.len() as usize,
1952 line_number_layouts,
1953 snapshot.mode,
1954 cx,
1955 )
1956 }
1957 }
1958
1959 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut ElementContext) -> LayoutState {
1960 self.editor.update(cx, |editor, cx| {
1961 let snapshot = editor.snapshot(cx);
1962 let style = self.style.clone();
1963
1964 let font_id = cx.text_system().resolve_font(&style.text.font());
1965 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1966 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1967 let em_width = cx
1968 .text_system()
1969 .typographic_bounds(font_id, font_size, 'm')
1970 .unwrap()
1971 .size
1972 .width;
1973 let em_advance = cx
1974 .text_system()
1975 .advance(font_id, font_size, 'm')
1976 .unwrap()
1977 .width;
1978
1979 let gutter_dimensions = snapshot.gutter_dimensions(font_id, font_size, em_width, self.max_line_number_width(&snapshot, cx), cx);
1980
1981 editor.gutter_width = gutter_dimensions.width;
1982
1983 let text_width = bounds.size.width - gutter_dimensions.width;
1984 let overscroll = size(em_width, px(0.));
1985 let _snapshot = {
1986 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1987
1988 let editor_width = text_width - gutter_dimensions.margin - overscroll.width - em_width;
1989 let wrap_width = match editor.soft_wrap_mode(cx) {
1990 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1991 SoftWrap::EditorWidth => editor_width,
1992 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1993 };
1994
1995 if editor.set_wrap_width(Some(wrap_width), cx) {
1996 editor.snapshot(cx)
1997 } else {
1998 snapshot
1999 }
2000 };
2001
2002 let wrap_guides = editor
2003 .wrap_guides(cx)
2004 .iter()
2005 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2006 .collect::<SmallVec<[_; 2]>>();
2007
2008 let gutter_size = size(gutter_dimensions.width, bounds.size.height);
2009 let text_size = size(text_width, bounds.size.height);
2010
2011 let autoscroll_horizontally =
2012 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
2013 let mut snapshot = editor.snapshot(cx);
2014
2015 let scroll_position = snapshot.scroll_position();
2016 // The scroll position is a fractional point, the whole number of which represents
2017 // the top of the window in terms of display rows.
2018 let start_row = scroll_position.y as u32;
2019 let height_in_lines = f32::from(bounds.size.height / line_height);
2020 let max_row = snapshot.max_point().row();
2021
2022 // Add 1 to ensure selections bleed off screen
2023 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
2024
2025 let start_anchor = if start_row == 0 {
2026 Anchor::min()
2027 } else {
2028 snapshot
2029 .buffer_snapshot
2030 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2031 };
2032 let end_anchor = if end_row > max_row {
2033 Anchor::max()
2034 } else {
2035 snapshot
2036 .buffer_snapshot
2037 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2038 };
2039
2040 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
2041 let mut active_rows = BTreeMap::new();
2042 let is_singleton = editor.is_singleton(cx);
2043
2044 let highlighted_rows = editor.highlighted_rows();
2045 let highlighted_ranges = editor.background_highlights_in_range(
2046 start_anchor..end_anchor,
2047 &snapshot.display_snapshot,
2048 cx.theme().colors(),
2049 );
2050
2051 let redacted_ranges = editor.redacted_ranges(start_anchor..end_anchor, &snapshot.display_snapshot, cx);
2052
2053 let mut newest_selection_head = None;
2054
2055 if editor.show_local_selections {
2056 let mut local_selections: Vec<Selection<Point>> = editor
2057 .selections
2058 .disjoint_in_range(start_anchor..end_anchor, cx);
2059 local_selections.extend(editor.selections.pending(cx));
2060 let mut layouts = Vec::new();
2061 let newest = editor.selections.newest(cx);
2062 for selection in local_selections.drain(..) {
2063 let is_empty = selection.start == selection.end;
2064 let is_newest = selection == newest;
2065
2066 let layout = SelectionLayout::new(
2067 selection,
2068 editor.selections.line_mode,
2069 editor.cursor_shape,
2070 &snapshot.display_snapshot,
2071 is_newest,
2072 true,
2073 None,
2074 );
2075 if is_newest {
2076 newest_selection_head = Some(layout.head);
2077 }
2078
2079 for row in cmp::max(layout.active_rows.start, start_row)
2080 ..=cmp::min(layout.active_rows.end, end_row)
2081 {
2082 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2083 *contains_non_empty_selection |= !is_empty;
2084 }
2085 layouts.push(layout);
2086 }
2087
2088 let player = if editor.read_only(cx) {
2089 cx.theme().players().read_only()
2090 } else {
2091 style.local_player
2092 };
2093
2094 selections.push((player, layouts));
2095 }
2096
2097 if let Some(collaboration_hub) = &editor.collaboration_hub {
2098 // When following someone, render the local selections in their color.
2099 if let Some(leader_id) = editor.leader_peer_id {
2100 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
2101 if let Some(participant_index) = collaboration_hub
2102 .user_participant_indices(cx)
2103 .get(&collaborator.user_id)
2104 {
2105 if let Some((local_selection_style, _)) = selections.first_mut() {
2106 *local_selection_style = cx
2107 .theme()
2108 .players()
2109 .color_for_participant(participant_index.0);
2110 }
2111 }
2112 }
2113 }
2114
2115 let mut remote_selections = HashMap::default();
2116 for selection in snapshot.remote_selections_in_range(
2117 &(start_anchor..end_anchor),
2118 collaboration_hub.as_ref(),
2119 cx,
2120 ) {
2121 let selection_style = if let Some(participant_index) = selection.participant_index {
2122 cx.theme()
2123 .players()
2124 .color_for_participant(participant_index.0)
2125 } else {
2126 cx.theme().players().absent()
2127 };
2128
2129 // Don't re-render the leader's selections, since the local selections
2130 // match theirs.
2131 if Some(selection.peer_id) == editor.leader_peer_id {
2132 continue;
2133 }
2134 let key = HoveredCursor{replica_id: selection.replica_id, selection_id: selection.selection.id};
2135
2136 let is_shown = editor.show_cursor_names || editor.hovered_cursors.contains_key(&key);
2137
2138 remote_selections
2139 .entry(selection.replica_id)
2140 .or_insert((selection_style, Vec::new()))
2141 .1
2142 .push(SelectionLayout::new(
2143 selection.selection,
2144 selection.line_mode,
2145 selection.cursor_shape,
2146 &snapshot.display_snapshot,
2147 false,
2148 false,
2149 if is_shown {
2150 selection.user_name
2151 } else {
2152 None
2153 },
2154 ));
2155 }
2156
2157 selections.extend(remote_selections.into_values());
2158 }
2159
2160 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
2161 let show_scrollbars = match scrollbar_settings.show {
2162 ShowScrollbar::Auto => {
2163 // Git
2164 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2165 ||
2166 // Selections
2167 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
2168 ||
2169 // Symbols Selections
2170 (is_singleton && scrollbar_settings.symbols_selections && (editor.has_background_highlights::<DocumentHighlightRead>() || editor.has_background_highlights::<DocumentHighlightWrite>()))
2171 ||
2172 // Diagnostics
2173 (is_singleton && scrollbar_settings.diagnostics && snapshot.buffer_snapshot.has_diagnostics())
2174 ||
2175 // Scrollmanager
2176 editor.scroll_manager.scrollbars_visible()
2177 }
2178 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2179 ShowScrollbar::Always => true,
2180 ShowScrollbar::Never => false,
2181 };
2182
2183 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
2184 let newest = editor.selections.newest::<Point>(cx);
2185 SelectionLayout::new(
2186 newest,
2187 editor.selections.line_mode,
2188 editor.cursor_shape,
2189 &snapshot.display_snapshot,
2190 true,
2191 true,
2192 None,
2193 )
2194 .head
2195 });
2196
2197 let (line_numbers, fold_statuses) = self.shape_line_numbers(
2198 start_row..end_row,
2199 &active_rows,
2200 head_for_relative,
2201 is_singleton,
2202 &snapshot,
2203 cx,
2204 );
2205
2206 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2207
2208 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2209
2210 let mut max_visible_line_width = Pixels::ZERO;
2211 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2212 for line_with_invisibles in &line_layouts {
2213 if line_with_invisibles.line.width > max_visible_line_width {
2214 max_visible_line_width = line_with_invisibles.line.width;
2215 }
2216 }
2217
2218 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2219 .unwrap()
2220 .width;
2221 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2222
2223 let editor_view = cx.view().clone();
2224 let (scroll_width, blocks) = cx.with_element_context(|cx| {
2225 cx.with_element_id(Some("editor_blocks"), |cx| {
2226 self.layout_blocks(
2227 start_row..end_row,
2228 &snapshot,
2229 bounds.size.width,
2230 scroll_width,
2231 text_width,
2232 gutter_dimensions.padding,
2233 gutter_dimensions.width,
2234 em_width,
2235 gutter_dimensions.width + gutter_dimensions.margin,
2236 line_height,
2237 &style,
2238 &line_layouts,
2239 editor,
2240 editor_view,
2241 cx,
2242 )
2243 })
2244 });
2245
2246 let scroll_max = point(
2247 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2248 max_row as f32,
2249 );
2250
2251 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2252
2253 let autoscrolled = if autoscroll_horizontally {
2254 editor.autoscroll_horizontally(
2255 start_row,
2256 text_size.width,
2257 scroll_width,
2258 em_width,
2259 &line_layouts,
2260 cx,
2261 )
2262 } else {
2263 false
2264 };
2265
2266 if clamped || autoscrolled {
2267 snapshot = editor.snapshot(cx);
2268 }
2269
2270 let mut context_menu = None;
2271 let mut code_actions_indicator = None;
2272 if let Some(newest_selection_head) = newest_selection_head {
2273 if (start_row..end_row).contains(&newest_selection_head.row()) {
2274 if editor.context_menu_visible() {
2275 let max_height = cmp::min(
2276 12. * line_height,
2277 cmp::max(
2278 3. * line_height,
2279 (bounds.size.height - line_height) / 2.,
2280 )
2281 );
2282 context_menu =
2283 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2284 }
2285
2286 let active = matches!(
2287 editor.context_menu.read().as_ref(),
2288 Some(crate::ContextMenu::CodeActions(_))
2289 );
2290
2291 code_actions_indicator = editor
2292 .render_code_actions_indicator(&style, active, cx)
2293 .map(|element| CodeActionsIndicator {
2294 row: newest_selection_head.row(),
2295 button: element,
2296 });
2297 }
2298 }
2299
2300 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2301 let max_size = size(
2302 (120. * em_width) // Default size
2303 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2304 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2305 (16. * line_height) // Default size
2306 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2307 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2308 );
2309
2310 let hover = if context_menu.is_some() {
2311 None
2312 } else {
2313 editor.hover_state.render(
2314 &snapshot,
2315 &style,
2316 visible_rows,
2317 max_size,
2318 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2319 cx,
2320 )
2321 };
2322
2323 let editor_view = cx.view().clone();
2324 let fold_indicators = cx.with_element_context(|cx| {
2325
2326 cx.with_element_id(Some("gutter_fold_indicators"), |_cx| {
2327 editor.render_fold_indicators(
2328 fold_statuses,
2329 &style,
2330 editor.gutter_hovered,
2331 line_height,
2332 gutter_dimensions.margin,
2333 editor_view,
2334 )
2335 })
2336 });
2337
2338 let invisible_symbol_font_size = font_size / 2.;
2339 let tab_invisible = cx
2340 .text_system()
2341 .shape_line(
2342 "→".into(),
2343 invisible_symbol_font_size,
2344 &[TextRun {
2345 len: "→".len(),
2346 font: self.style.text.font(),
2347 color: cx.theme().colors().editor_invisible,
2348 background_color: None,
2349 underline: None,
2350 }],
2351 )
2352 .unwrap();
2353 let space_invisible = cx
2354 .text_system()
2355 .shape_line(
2356 "•".into(),
2357 invisible_symbol_font_size,
2358 &[TextRun {
2359 len: "•".len(),
2360 font: self.style.text.font(),
2361 color: cx.theme().colors().editor_invisible,
2362 background_color: None,
2363 underline: None,
2364 }],
2365 )
2366 .unwrap();
2367
2368 LayoutState {
2369 mode: snapshot.mode,
2370 position_map: Arc::new(PositionMap {
2371 size: bounds.size,
2372 scroll_position: point(
2373 scroll_position.x * em_width,
2374 scroll_position.y * line_height,
2375 ),
2376 scroll_max,
2377 line_layouts,
2378 line_height,
2379 em_width,
2380 em_advance,
2381 snapshot,
2382 }),
2383 visible_anchor_range: start_anchor..end_anchor,
2384 visible_display_row_range: start_row..end_row,
2385 wrap_guides,
2386 gutter_size,
2387 gutter_padding: gutter_dimensions.padding,
2388 text_size,
2389 scrollbar_row_range,
2390 show_scrollbars,
2391 is_singleton,
2392 max_row,
2393 gutter_margin: gutter_dimensions.margin,
2394 active_rows,
2395 highlighted_rows,
2396 highlighted_ranges,
2397 redacted_ranges,
2398 line_numbers,
2399 display_hunks,
2400 blocks,
2401 selections,
2402 context_menu,
2403 code_actions_indicator,
2404 fold_indicators,
2405 tab_invisible,
2406 space_invisible,
2407 hover_popovers: hover,
2408 }
2409 })
2410 }
2411
2412 #[allow(clippy::too_many_arguments)]
2413 fn layout_blocks(
2414 &self,
2415 rows: Range<u32>,
2416 snapshot: &EditorSnapshot,
2417 editor_width: Pixels,
2418 scroll_width: Pixels,
2419 text_width: Pixels,
2420 gutter_padding: Pixels,
2421 gutter_width: Pixels,
2422 em_width: Pixels,
2423 text_x: Pixels,
2424 line_height: Pixels,
2425 style: &EditorStyle,
2426 line_layouts: &[LineWithInvisibles],
2427 editor: &mut Editor,
2428 editor_view: View<Editor>,
2429 cx: &mut ElementContext,
2430 ) -> (Pixels, Vec<BlockLayout>) {
2431 let mut block_id = 0;
2432 let (fixed_blocks, non_fixed_blocks) = snapshot
2433 .blocks_in_range(rows.clone())
2434 .partition::<Vec<_>, _>(|(_, block)| match block {
2435 TransformBlock::ExcerptHeader { .. } => false,
2436 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2437 });
2438
2439 let render_block = |block: &TransformBlock,
2440 available_space: Size<AvailableSpace>,
2441 block_id: usize,
2442 editor: &mut Editor,
2443 cx: &mut ElementContext| {
2444 let mut element = match block {
2445 TransformBlock::Custom(block) => {
2446 let align_to = block
2447 .position()
2448 .to_point(&snapshot.buffer_snapshot)
2449 .to_display_point(snapshot);
2450 let anchor_x = text_x
2451 + if rows.contains(&align_to.row()) {
2452 line_layouts[(align_to.row() - rows.start) as usize]
2453 .line
2454 .x_for_index(align_to.column() as usize)
2455 } else {
2456 layout_line(align_to.row(), snapshot, style, cx)
2457 .unwrap()
2458 .x_for_index(align_to.column() as usize)
2459 };
2460
2461 block.render(&mut BlockContext {
2462 context: cx,
2463 anchor_x,
2464 gutter_padding,
2465 line_height,
2466 gutter_width,
2467 em_width,
2468 block_id,
2469 max_width: scroll_width.max(text_width),
2470 view: editor_view.clone(),
2471 editor_style: &self.style,
2472 })
2473 }
2474
2475 TransformBlock::ExcerptHeader {
2476 buffer,
2477 range,
2478 starts_new_buffer,
2479 ..
2480 } => {
2481 let include_root = editor
2482 .project
2483 .as_ref()
2484 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2485 .unwrap_or_default();
2486
2487 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2488 let jump_path = ProjectPath {
2489 worktree_id: file.worktree_id(cx),
2490 path: file.path.clone(),
2491 };
2492 let jump_anchor = range
2493 .primary
2494 .as_ref()
2495 .map_or(range.context.start, |primary| primary.start);
2496 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2497
2498 cx.listener_for(&self.editor, move |editor, _, cx| {
2499 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2500 })
2501 });
2502
2503 let element = if *starts_new_buffer {
2504 let path = buffer.resolve_file_path(cx, include_root);
2505 let mut filename = None;
2506 let mut parent_path = None;
2507 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2508 if let Some(path) = path {
2509 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2510 parent_path = path
2511 .parent()
2512 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2513 }
2514
2515 v_flex()
2516 .id(("path header container", block_id))
2517 .size_full()
2518 .justify_center()
2519 .p(gpui::px(6.))
2520 .child(
2521 h_flex()
2522 .id("path header block")
2523 .size_full()
2524 .pl(gpui::px(12.))
2525 .pr(gpui::px(8.))
2526 .rounded_md()
2527 .shadow_md()
2528 .border()
2529 .border_color(cx.theme().colors().border)
2530 .bg(cx.theme().colors().editor_subheader_background)
2531 .justify_between()
2532 .hover(|style| style.bg(cx.theme().colors().element_hover))
2533 .child(
2534 h_flex().gap_3().child(
2535 h_flex()
2536 .gap_2()
2537 .child(
2538 filename
2539 .map(SharedString::from)
2540 .unwrap_or_else(|| "untitled".into()),
2541 )
2542 .when_some(parent_path, |then, path| {
2543 then.child(
2544 div().child(path).text_color(
2545 cx.theme().colors().text_muted,
2546 ),
2547 )
2548 }),
2549 ),
2550 )
2551 .when_some(jump_handler, |this, jump_handler| {
2552 this.cursor_pointer()
2553 .tooltip(|cx| {
2554 Tooltip::for_action(
2555 "Jump to Buffer",
2556 &OpenExcerpts,
2557 cx,
2558 )
2559 })
2560 .on_mouse_down(MouseButton::Left, |_, cx| {
2561 cx.stop_propagation()
2562 })
2563 .on_click(jump_handler)
2564 }),
2565 )
2566 } else {
2567 h_flex()
2568 .id(("collapsed context", block_id))
2569 .size_full()
2570 .gap(gutter_padding)
2571 .child(
2572 h_flex()
2573 .justify_end()
2574 .flex_none()
2575 .w(gutter_width - gutter_padding)
2576 .h_full()
2577 .text_buffer(cx)
2578 .text_color(cx.theme().colors().editor_line_number)
2579 .child("..."),
2580 )
2581 .child(
2582 ButtonLike::new("jump to collapsed context")
2583 .style(ButtonStyle::Transparent)
2584 .full_width()
2585 .child(
2586 div()
2587 .h_px()
2588 .w_full()
2589 .bg(cx.theme().colors().border_variant)
2590 .group_hover("", |style| {
2591 style.bg(cx.theme().colors().border)
2592 }),
2593 )
2594 .when_some(jump_handler, |this, jump_handler| {
2595 this.on_click(jump_handler).tooltip(|cx| {
2596 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2597 })
2598 }),
2599 )
2600 };
2601 element.into_any()
2602 }
2603 };
2604
2605 let size = element.measure(available_space, cx);
2606 (element, size)
2607 };
2608
2609 let mut fixed_block_max_width = Pixels::ZERO;
2610 let mut blocks = Vec::new();
2611 for (row, block) in fixed_blocks {
2612 let available_space = size(
2613 AvailableSpace::MinContent,
2614 AvailableSpace::Definite(block.height() as f32 * line_height),
2615 );
2616 let (element, element_size) =
2617 render_block(block, available_space, block_id, editor, cx);
2618 block_id += 1;
2619 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2620 blocks.push(BlockLayout {
2621 row,
2622 element,
2623 available_space,
2624 style: BlockStyle::Fixed,
2625 });
2626 }
2627 for (row, block) in non_fixed_blocks {
2628 let style = match block {
2629 TransformBlock::Custom(block) => block.style(),
2630 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2631 };
2632 let width = match style {
2633 BlockStyle::Sticky => editor_width,
2634 BlockStyle::Flex => editor_width
2635 .max(fixed_block_max_width)
2636 .max(gutter_width + scroll_width),
2637 BlockStyle::Fixed => unreachable!(),
2638 };
2639 let available_space = size(
2640 AvailableSpace::Definite(width),
2641 AvailableSpace::Definite(block.height() as f32 * line_height),
2642 );
2643 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2644 block_id += 1;
2645 blocks.push(BlockLayout {
2646 row,
2647 element,
2648 available_space,
2649 style,
2650 });
2651 }
2652 (
2653 scroll_width.max(fixed_block_max_width - gutter_width),
2654 blocks,
2655 )
2656 }
2657
2658 fn paint_scroll_wheel_listener(
2659 &mut self,
2660 interactive_bounds: &InteractiveBounds,
2661 layout: &LayoutState,
2662 cx: &mut ElementContext,
2663 ) {
2664 cx.on_mouse_event({
2665 let position_map = layout.position_map.clone();
2666 let editor = self.editor.clone();
2667 let interactive_bounds = interactive_bounds.clone();
2668 let mut delta = ScrollDelta::default();
2669
2670 move |event: &ScrollWheelEvent, phase, cx| {
2671 if phase == DispatchPhase::Bubble
2672 && interactive_bounds.visibly_contains(&event.position, cx)
2673 {
2674 delta = delta.coalesce(event.delta);
2675 editor.update(cx, |editor, cx| {
2676 let position = event.position;
2677 let position_map: &PositionMap = &position_map;
2678 let bounds = &interactive_bounds;
2679 if !bounds.visibly_contains(&position, cx) {
2680 return;
2681 }
2682
2683 let line_height = position_map.line_height;
2684 let max_glyph_width = position_map.em_width;
2685 let (delta, axis) = match delta {
2686 gpui::ScrollDelta::Pixels(mut pixels) => {
2687 //Trackpad
2688 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2689 (pixels, axis)
2690 }
2691
2692 gpui::ScrollDelta::Lines(lines) => {
2693 //Not trackpad
2694 let pixels =
2695 point(lines.x * max_glyph_width, lines.y * line_height);
2696 (pixels, None)
2697 }
2698 };
2699
2700 let scroll_position = position_map.snapshot.scroll_position();
2701 let x = f32::from(
2702 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2703 );
2704 let y =
2705 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2706 let scroll_position =
2707 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2708 editor.scroll(scroll_position, axis, cx);
2709 cx.stop_propagation();
2710 });
2711 }
2712 }
2713 });
2714 }
2715
2716 fn paint_mouse_listeners(
2717 &mut self,
2718 bounds: Bounds<Pixels>,
2719 gutter_bounds: Bounds<Pixels>,
2720 text_bounds: Bounds<Pixels>,
2721 layout: &LayoutState,
2722 cx: &mut ElementContext,
2723 ) {
2724 let interactive_bounds = InteractiveBounds {
2725 bounds: bounds.intersect(&cx.content_mask().bounds),
2726 stacking_order: cx.stacking_order().clone(),
2727 };
2728
2729 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2730
2731 cx.on_mouse_event({
2732 let position_map = layout.position_map.clone();
2733 let editor = self.editor.clone();
2734 let stacking_order = cx.stacking_order().clone();
2735 let interactive_bounds = interactive_bounds.clone();
2736
2737 move |event: &MouseDownEvent, phase, cx| {
2738 if phase == DispatchPhase::Bubble
2739 && interactive_bounds.visibly_contains(&event.position, cx)
2740 {
2741 match event.button {
2742 MouseButton::Left => editor.update(cx, |editor, cx| {
2743 Self::mouse_left_down(
2744 editor,
2745 event,
2746 &position_map,
2747 text_bounds,
2748 gutter_bounds,
2749 &stacking_order,
2750 cx,
2751 );
2752 }),
2753 MouseButton::Right => editor.update(cx, |editor, cx| {
2754 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2755 }),
2756 _ => {}
2757 };
2758 }
2759 }
2760 });
2761
2762 cx.on_mouse_event({
2763 let position_map = layout.position_map.clone();
2764 let editor = self.editor.clone();
2765 let stacking_order = cx.stacking_order().clone();
2766 let interactive_bounds = interactive_bounds.clone();
2767
2768 move |event: &MouseUpEvent, phase, cx| {
2769 if phase == DispatchPhase::Bubble {
2770 editor.update(cx, |editor, cx| {
2771 Self::mouse_up(
2772 editor,
2773 event,
2774 &position_map,
2775 text_bounds,
2776 &interactive_bounds,
2777 &stacking_order,
2778 cx,
2779 )
2780 });
2781 }
2782 }
2783 });
2784 cx.on_mouse_event({
2785 let position_map = layout.position_map.clone();
2786 let editor = self.editor.clone();
2787 let stacking_order = cx.stacking_order().clone();
2788
2789 move |event: &MouseMoveEvent, phase, cx| {
2790 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2791
2792 if phase == DispatchPhase::Bubble {
2793 editor.update(cx, |editor, cx| {
2794 if event.pressed_button == Some(MouseButton::Left) {
2795 Self::mouse_dragged(
2796 editor,
2797 event,
2798 &position_map,
2799 text_bounds,
2800 gutter_bounds,
2801 &stacking_order,
2802 cx,
2803 )
2804 }
2805
2806 if interactive_bounds.visibly_contains(&event.position, cx) {
2807 Self::mouse_moved(
2808 editor,
2809 event,
2810 &position_map,
2811 text_bounds,
2812 gutter_bounds,
2813 &stacking_order,
2814 cx,
2815 )
2816 }
2817 });
2818 }
2819 }
2820 });
2821 }
2822}
2823
2824#[derive(Debug)]
2825pub(crate) struct LineWithInvisibles {
2826 pub line: ShapedLine,
2827 invisibles: Vec<Invisible>,
2828}
2829
2830impl LineWithInvisibles {
2831 fn from_chunks<'a>(
2832 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2833 text_style: &TextStyle,
2834 max_line_len: usize,
2835 max_line_count: usize,
2836 line_number_layouts: &[Option<ShapedLine>],
2837 editor_mode: EditorMode,
2838 cx: &WindowContext,
2839 ) -> Vec<Self> {
2840 let mut layouts = Vec::with_capacity(max_line_count);
2841 let mut line = String::new();
2842 let mut invisibles = Vec::new();
2843 let mut styles = Vec::new();
2844 let mut non_whitespace_added = false;
2845 let mut row = 0;
2846 let mut line_exceeded_max_len = false;
2847 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2848
2849 for highlighted_chunk in chunks.chain([HighlightedChunk {
2850 chunk: "\n",
2851 style: None,
2852 is_tab: false,
2853 }]) {
2854 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2855 if ix > 0 {
2856 let shaped_line = cx
2857 .text_system()
2858 .shape_line(line.clone().into(), font_size, &styles)
2859 .unwrap();
2860 layouts.push(Self {
2861 line: shaped_line,
2862 invisibles: invisibles.drain(..).collect(),
2863 });
2864
2865 line.clear();
2866 styles.clear();
2867 row += 1;
2868 line_exceeded_max_len = false;
2869 non_whitespace_added = false;
2870 if row == max_line_count {
2871 return layouts;
2872 }
2873 }
2874
2875 if !line_chunk.is_empty() && !line_exceeded_max_len {
2876 let text_style = if let Some(style) = highlighted_chunk.style {
2877 Cow::Owned(text_style.clone().highlight(style))
2878 } else {
2879 Cow::Borrowed(text_style)
2880 };
2881
2882 if line.len() + line_chunk.len() > max_line_len {
2883 let mut chunk_len = max_line_len - line.len();
2884 while !line_chunk.is_char_boundary(chunk_len) {
2885 chunk_len -= 1;
2886 }
2887 line_chunk = &line_chunk[..chunk_len];
2888 line_exceeded_max_len = true;
2889 }
2890
2891 styles.push(TextRun {
2892 len: line_chunk.len(),
2893 font: text_style.font(),
2894 color: text_style.color,
2895 background_color: text_style.background_color,
2896 underline: text_style.underline,
2897 });
2898
2899 if editor_mode == EditorMode::Full {
2900 // Line wrap pads its contents with fake whitespaces,
2901 // avoid printing them
2902 let inside_wrapped_string = line_number_layouts
2903 .get(row)
2904 .and_then(|layout| layout.as_ref())
2905 .is_none();
2906 if highlighted_chunk.is_tab {
2907 if non_whitespace_added || !inside_wrapped_string {
2908 invisibles.push(Invisible::Tab {
2909 line_start_offset: line.len(),
2910 });
2911 }
2912 } else {
2913 invisibles.extend(
2914 line_chunk
2915 .chars()
2916 .enumerate()
2917 .filter(|(_, line_char)| {
2918 let is_whitespace = line_char.is_whitespace();
2919 non_whitespace_added |= !is_whitespace;
2920 is_whitespace
2921 && (non_whitespace_added || !inside_wrapped_string)
2922 })
2923 .map(|(whitespace_index, _)| Invisible::Whitespace {
2924 line_offset: line.len() + whitespace_index,
2925 }),
2926 )
2927 }
2928 }
2929
2930 line.push_str(line_chunk);
2931 }
2932 }
2933 }
2934
2935 layouts
2936 }
2937
2938 fn draw(
2939 &self,
2940 layout: &LayoutState,
2941 row: u32,
2942 content_origin: gpui::Point<Pixels>,
2943 whitespace_setting: ShowWhitespaceSetting,
2944 selection_ranges: &[Range<DisplayPoint>],
2945 cx: &mut ElementContext,
2946 ) {
2947 let line_height = layout.position_map.line_height;
2948 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2949
2950 self.line
2951 .paint(
2952 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2953 line_height,
2954 cx,
2955 )
2956 .log_err();
2957
2958 self.draw_invisibles(
2959 &selection_ranges,
2960 layout,
2961 content_origin,
2962 line_y,
2963 row,
2964 line_height,
2965 whitespace_setting,
2966 cx,
2967 );
2968 }
2969
2970 fn draw_invisibles(
2971 &self,
2972 selection_ranges: &[Range<DisplayPoint>],
2973 layout: &LayoutState,
2974 content_origin: gpui::Point<Pixels>,
2975 line_y: Pixels,
2976 row: u32,
2977 line_height: Pixels,
2978 whitespace_setting: ShowWhitespaceSetting,
2979 cx: &mut ElementContext,
2980 ) {
2981 let allowed_invisibles_regions = match whitespace_setting {
2982 ShowWhitespaceSetting::None => return,
2983 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2984 ShowWhitespaceSetting::All => None,
2985 };
2986
2987 for invisible in &self.invisibles {
2988 let (&token_offset, invisible_symbol) = match invisible {
2989 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2990 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2991 };
2992
2993 let x_offset = self.line.x_for_index(token_offset);
2994 let invisible_offset =
2995 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2996 let origin = content_origin
2997 + gpui::point(
2998 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2999 line_y,
3000 );
3001
3002 if let Some(allowed_regions) = allowed_invisibles_regions {
3003 let invisible_point = DisplayPoint::new(row, token_offset as u32);
3004 if !allowed_regions
3005 .iter()
3006 .any(|region| region.start <= invisible_point && invisible_point < region.end)
3007 {
3008 continue;
3009 }
3010 }
3011 invisible_symbol.paint(origin, line_height, cx).log_err();
3012 }
3013 }
3014}
3015
3016#[derive(Debug, Clone, Copy, PartialEq, Eq)]
3017enum Invisible {
3018 Tab { line_start_offset: usize },
3019 Whitespace { line_offset: usize },
3020}
3021
3022impl Element for EditorElement {
3023 type State = ();
3024
3025 fn request_layout(
3026 &mut self,
3027 _element_state: Option<Self::State>,
3028 cx: &mut gpui::ElementContext,
3029 ) -> (gpui::LayoutId, Self::State) {
3030 cx.with_view_id(self.editor.entity_id(), |cx| {
3031 self.editor.update(cx, |editor, cx| {
3032 editor.set_style(self.style.clone(), cx);
3033
3034 let layout_id = match editor.mode {
3035 EditorMode::SingleLine => {
3036 let rem_size = cx.rem_size();
3037 let mut style = Style::default();
3038 style.size.width = relative(1.).into();
3039 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
3040 cx.with_element_context(|cx| cx.request_layout(&style, None))
3041 }
3042 EditorMode::AutoHeight { max_lines } => {
3043 let editor_handle = cx.view().clone();
3044 let max_line_number_width =
3045 self.max_line_number_width(&editor.snapshot(cx), cx);
3046 cx.with_element_context(|cx| {
3047 cx.request_measured_layout(
3048 Style::default(),
3049 move |known_dimensions, _, cx| {
3050 editor_handle
3051 .update(cx, |editor, cx| {
3052 compute_auto_height_layout(
3053 editor,
3054 max_lines,
3055 max_line_number_width,
3056 known_dimensions,
3057 cx,
3058 )
3059 })
3060 .unwrap_or_default()
3061 },
3062 )
3063 })
3064 }
3065 EditorMode::Full => {
3066 let mut style = Style::default();
3067 style.size.width = relative(1.).into();
3068 style.size.height = relative(1.).into();
3069 cx.with_element_context(|cx| cx.request_layout(&style, None))
3070 }
3071 };
3072
3073 (layout_id, ())
3074 })
3075 })
3076 }
3077
3078 fn paint(
3079 &mut self,
3080 bounds: Bounds<gpui::Pixels>,
3081 _element_state: &mut Self::State,
3082 cx: &mut gpui::ElementContext,
3083 ) {
3084 let editor = self.editor.clone();
3085
3086 cx.paint_view(self.editor.entity_id(), |cx| {
3087 cx.with_text_style(
3088 Some(gpui::TextStyleRefinement {
3089 font_size: Some(self.style.text.font_size),
3090 line_height: Some(self.style.text.line_height),
3091 ..Default::default()
3092 }),
3093 |cx| {
3094 let mut layout = self.compute_layout(bounds, cx);
3095 let gutter_bounds = Bounds {
3096 origin: bounds.origin,
3097 size: layout.gutter_size,
3098 };
3099 let text_bounds = Bounds {
3100 origin: gutter_bounds.upper_right(),
3101 size: layout.text_size,
3102 };
3103
3104 let focus_handle = editor.focus_handle(cx);
3105 let key_context = self.editor.read(cx).key_context(cx);
3106 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
3107 self.register_actions(cx);
3108 self.register_key_listeners(cx);
3109
3110 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
3111 cx.handle_input(
3112 &focus_handle,
3113 ElementInputHandler::new(bounds, self.editor.clone()),
3114 );
3115
3116 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
3117 if layout.gutter_size.width > Pixels::ZERO {
3118 self.paint_gutter(gutter_bounds, &mut layout, cx);
3119 }
3120 self.paint_text(text_bounds, &mut layout, cx);
3121
3122 cx.with_z_index(0, |cx| {
3123 self.paint_mouse_listeners(
3124 bounds,
3125 gutter_bounds,
3126 text_bounds,
3127 &layout,
3128 cx,
3129 );
3130 });
3131 if !layout.blocks.is_empty() {
3132 cx.with_z_index(0, |cx| {
3133 cx.with_element_id(Some("editor_blocks"), |cx| {
3134 self.paint_blocks(bounds, &mut layout, cx);
3135 });
3136 })
3137 }
3138
3139 cx.with_z_index(1, |cx| {
3140 self.paint_overlays(text_bounds, &mut layout, cx);
3141 });
3142
3143 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
3144 });
3145 })
3146 },
3147 )
3148 })
3149 }
3150}
3151
3152impl IntoElement for EditorElement {
3153 type Element = Self;
3154
3155 fn element_id(&self) -> Option<gpui::ElementId> {
3156 self.editor.element_id()
3157 }
3158
3159 fn into_element(self) -> Self::Element {
3160 self
3161 }
3162}
3163
3164type BufferRow = u32;
3165
3166pub struct LayoutState {
3167 position_map: Arc<PositionMap>,
3168 gutter_size: Size<Pixels>,
3169 gutter_padding: Pixels,
3170 gutter_margin: Pixels,
3171 text_size: gpui::Size<Pixels>,
3172 mode: EditorMode,
3173 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
3174 visible_anchor_range: Range<Anchor>,
3175 visible_display_row_range: Range<u32>,
3176 active_rows: BTreeMap<u32, bool>,
3177 highlighted_rows: Option<Range<u32>>,
3178 line_numbers: Vec<Option<ShapedLine>>,
3179 display_hunks: Vec<DisplayDiffHunk>,
3180 blocks: Vec<BlockLayout>,
3181 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
3182 redacted_ranges: Vec<Range<DisplayPoint>>,
3183 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
3184 scrollbar_row_range: Range<f32>,
3185 show_scrollbars: bool,
3186 is_singleton: bool,
3187 max_row: u32,
3188 context_menu: Option<(DisplayPoint, AnyElement)>,
3189 code_actions_indicator: Option<CodeActionsIndicator>,
3190 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
3191 fold_indicators: Vec<Option<IconButton>>,
3192 tab_invisible: ShapedLine,
3193 space_invisible: ShapedLine,
3194}
3195
3196impl LayoutState {
3197 fn line_end_overshoot(&self) -> Pixels {
3198 0.15 * self.position_map.line_height
3199 }
3200}
3201
3202struct CodeActionsIndicator {
3203 row: u32,
3204 button: IconButton,
3205}
3206
3207struct PositionMap {
3208 size: Size<Pixels>,
3209 line_height: Pixels,
3210 scroll_position: gpui::Point<Pixels>,
3211 scroll_max: gpui::Point<f32>,
3212 em_width: Pixels,
3213 em_advance: Pixels,
3214 line_layouts: Vec<LineWithInvisibles>,
3215 snapshot: EditorSnapshot,
3216}
3217
3218#[derive(Debug, Copy, Clone)]
3219pub struct PointForPosition {
3220 pub previous_valid: DisplayPoint,
3221 pub next_valid: DisplayPoint,
3222 pub exact_unclipped: DisplayPoint,
3223 pub column_overshoot_after_line_end: u32,
3224}
3225
3226impl PointForPosition {
3227 #[cfg(test)]
3228 pub fn valid(valid: DisplayPoint) -> Self {
3229 Self {
3230 previous_valid: valid,
3231 next_valid: valid,
3232 exact_unclipped: valid,
3233 column_overshoot_after_line_end: 0,
3234 }
3235 }
3236
3237 pub fn as_valid(&self) -> Option<DisplayPoint> {
3238 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
3239 Some(self.previous_valid)
3240 } else {
3241 None
3242 }
3243 }
3244}
3245
3246impl PositionMap {
3247 fn point_for_position(
3248 &self,
3249 text_bounds: Bounds<Pixels>,
3250 position: gpui::Point<Pixels>,
3251 ) -> PointForPosition {
3252 let scroll_position = self.snapshot.scroll_position();
3253 let position = position - text_bounds.origin;
3254 let y = position.y.max(px(0.)).min(self.size.height);
3255 let x = position.x + (scroll_position.x * self.em_width);
3256 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3257
3258 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3259 .line_layouts
3260 .get(row as usize - scroll_position.y as usize)
3261 .map(|&LineWithInvisibles { ref line, .. }| line)
3262 {
3263 if let Some(ix) = line.index_for_x(x) {
3264 (ix as u32, px(0.))
3265 } else {
3266 (line.len as u32, px(0.).max(x - line.width))
3267 }
3268 } else {
3269 (0, x)
3270 };
3271
3272 let mut exact_unclipped = DisplayPoint::new(row, column);
3273 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3274 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3275
3276 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3277 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3278 PointForPosition {
3279 previous_valid,
3280 next_valid,
3281 exact_unclipped,
3282 column_overshoot_after_line_end,
3283 }
3284 }
3285}
3286
3287struct BlockLayout {
3288 row: u32,
3289 element: AnyElement,
3290 available_space: Size<AvailableSpace>,
3291 style: BlockStyle,
3292}
3293
3294fn layout_line(
3295 row: u32,
3296 snapshot: &EditorSnapshot,
3297 style: &EditorStyle,
3298 cx: &WindowContext,
3299) -> Result<ShapedLine> {
3300 let mut line = snapshot.line(row);
3301
3302 if line.len() > MAX_LINE_LEN {
3303 let mut len = MAX_LINE_LEN;
3304 while !line.is_char_boundary(len) {
3305 len -= 1;
3306 }
3307
3308 line.truncate(len);
3309 }
3310
3311 cx.text_system().shape_line(
3312 line.into(),
3313 style.text.font_size.to_pixels(cx.rem_size()),
3314 &[TextRun {
3315 len: snapshot.line_len(row) as usize,
3316 font: style.text.font(),
3317 color: Hsla::default(),
3318 background_color: None,
3319 underline: None,
3320 }],
3321 )
3322}
3323
3324#[derive(Debug)]
3325pub struct Cursor {
3326 origin: gpui::Point<Pixels>,
3327 block_width: Pixels,
3328 line_height: Pixels,
3329 color: Hsla,
3330 shape: CursorShape,
3331 block_text: Option<ShapedLine>,
3332 cursor_name: Option<CursorName>,
3333}
3334
3335#[derive(Debug)]
3336pub struct CursorName {
3337 string: SharedString,
3338 color: Hsla,
3339 is_top_row: bool,
3340 z_index: u16,
3341}
3342
3343impl Cursor {
3344 pub fn new(
3345 origin: gpui::Point<Pixels>,
3346 block_width: Pixels,
3347 line_height: Pixels,
3348 color: Hsla,
3349 shape: CursorShape,
3350 block_text: Option<ShapedLine>,
3351 cursor_name: Option<CursorName>,
3352 ) -> Cursor {
3353 Cursor {
3354 origin,
3355 block_width,
3356 line_height,
3357 color,
3358 shape,
3359 block_text,
3360 cursor_name,
3361 }
3362 }
3363
3364 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3365 Bounds {
3366 origin: self.origin + origin,
3367 size: size(self.block_width, self.line_height),
3368 }
3369 }
3370
3371 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut ElementContext) {
3372 let bounds = match self.shape {
3373 CursorShape::Bar => Bounds {
3374 origin: self.origin + origin,
3375 size: size(px(2.0), self.line_height),
3376 },
3377 CursorShape::Block | CursorShape::Hollow => Bounds {
3378 origin: self.origin + origin,
3379 size: size(self.block_width, self.line_height),
3380 },
3381 CursorShape::Underscore => Bounds {
3382 origin: self.origin
3383 + origin
3384 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3385 size: size(self.block_width, px(2.0)),
3386 },
3387 };
3388
3389 //Draw background or border quad
3390 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3391 outline(bounds, self.color)
3392 } else {
3393 fill(bounds, self.color)
3394 };
3395
3396 if let Some(name) = &self.cursor_name {
3397 let text_size = self.line_height / 1.5;
3398
3399 let name_origin = if name.is_top_row {
3400 point(bounds.right() - px(1.), bounds.top())
3401 } else {
3402 point(bounds.left(), bounds.top() - text_size / 2. - px(1.))
3403 };
3404 cx.with_z_index(name.z_index, |cx| {
3405 div()
3406 .bg(self.color)
3407 .text_size(text_size)
3408 .px_0p5()
3409 .line_height(text_size + px(2.))
3410 .text_color(name.color)
3411 .child(name.string.clone())
3412 .into_any_element()
3413 .draw(
3414 name_origin,
3415 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
3416 cx,
3417 )
3418 })
3419 }
3420
3421 cx.paint_quad(cursor);
3422
3423 if let Some(block_text) = &self.block_text {
3424 block_text
3425 .paint(self.origin + origin, self.line_height, cx)
3426 .log_err();
3427 }
3428 }
3429
3430 pub fn shape(&self) -> CursorShape {
3431 self.shape
3432 }
3433}
3434
3435#[derive(Debug)]
3436pub struct HighlightedRange {
3437 pub start_y: Pixels,
3438 pub line_height: Pixels,
3439 pub lines: Vec<HighlightedRangeLine>,
3440 pub color: Hsla,
3441 pub corner_radius: Pixels,
3442}
3443
3444#[derive(Debug)]
3445pub struct HighlightedRangeLine {
3446 pub start_x: Pixels,
3447 pub end_x: Pixels,
3448}
3449
3450impl HighlightedRange {
3451 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut ElementContext) {
3452 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3453 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3454 self.paint_lines(
3455 self.start_y + self.line_height,
3456 &self.lines[1..],
3457 bounds,
3458 cx,
3459 );
3460 } else {
3461 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3462 }
3463 }
3464
3465 fn paint_lines(
3466 &self,
3467 start_y: Pixels,
3468 lines: &[HighlightedRangeLine],
3469 _bounds: Bounds<Pixels>,
3470 cx: &mut ElementContext,
3471 ) {
3472 if lines.is_empty() {
3473 return;
3474 }
3475
3476 let first_line = lines.first().unwrap();
3477 let last_line = lines.last().unwrap();
3478
3479 let first_top_left = point(first_line.start_x, start_y);
3480 let first_top_right = point(first_line.end_x, start_y);
3481
3482 let curve_height = point(Pixels::ZERO, self.corner_radius);
3483 let curve_width = |start_x: Pixels, end_x: Pixels| {
3484 let max = (end_x - start_x) / 2.;
3485 let width = if max < self.corner_radius {
3486 max
3487 } else {
3488 self.corner_radius
3489 };
3490
3491 point(width, Pixels::ZERO)
3492 };
3493
3494 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3495 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3496 path.curve_to(first_top_right + curve_height, first_top_right);
3497
3498 let mut iter = lines.iter().enumerate().peekable();
3499 while let Some((ix, line)) = iter.next() {
3500 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3501
3502 if let Some((_, next_line)) = iter.peek() {
3503 let next_top_right = point(next_line.end_x, bottom_right.y);
3504
3505 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3506 Ordering::Equal => {
3507 path.line_to(bottom_right);
3508 }
3509 Ordering::Less => {
3510 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3511 path.line_to(bottom_right - curve_height);
3512 if self.corner_radius > Pixels::ZERO {
3513 path.curve_to(bottom_right - curve_width, bottom_right);
3514 }
3515 path.line_to(next_top_right + curve_width);
3516 if self.corner_radius > Pixels::ZERO {
3517 path.curve_to(next_top_right + curve_height, next_top_right);
3518 }
3519 }
3520 Ordering::Greater => {
3521 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3522 path.line_to(bottom_right - curve_height);
3523 if self.corner_radius > Pixels::ZERO {
3524 path.curve_to(bottom_right + curve_width, bottom_right);
3525 }
3526 path.line_to(next_top_right - curve_width);
3527 if self.corner_radius > Pixels::ZERO {
3528 path.curve_to(next_top_right + curve_height, next_top_right);
3529 }
3530 }
3531 }
3532 } else {
3533 let curve_width = curve_width(line.start_x, line.end_x);
3534 path.line_to(bottom_right - curve_height);
3535 if self.corner_radius > Pixels::ZERO {
3536 path.curve_to(bottom_right - curve_width, bottom_right);
3537 }
3538
3539 let bottom_left = point(line.start_x, bottom_right.y);
3540 path.line_to(bottom_left + curve_width);
3541 if self.corner_radius > Pixels::ZERO {
3542 path.curve_to(bottom_left - curve_height, bottom_left);
3543 }
3544 }
3545 }
3546
3547 if first_line.start_x > last_line.start_x {
3548 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3549 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3550 path.line_to(second_top_left + curve_height);
3551 if self.corner_radius > Pixels::ZERO {
3552 path.curve_to(second_top_left + curve_width, second_top_left);
3553 }
3554 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3555 path.line_to(first_bottom_left - curve_width);
3556 if self.corner_radius > Pixels::ZERO {
3557 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3558 }
3559 }
3560
3561 path.line_to(first_top_left + curve_height);
3562 if self.corner_radius > Pixels::ZERO {
3563 path.curve_to(first_top_left + top_curve_width, first_top_left);
3564 }
3565 path.line_to(first_top_right - top_curve_width);
3566
3567 cx.paint_path(path, self.color);
3568 }
3569}
3570
3571pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3572 (delta.pow(1.5) / 100.0).into()
3573}
3574
3575fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3576 (delta.pow(1.2) / 300.0).into()
3577}
3578
3579#[cfg(test)]
3580mod tests {
3581 use super::*;
3582 use crate::{
3583 display_map::{BlockDisposition, BlockProperties},
3584 editor_tests::{init_test, update_test_language_settings},
3585 Editor, MultiBuffer,
3586 };
3587 use gpui::TestAppContext;
3588 use language::language_settings;
3589 use log::info;
3590 use std::{num::NonZeroU32, sync::Arc};
3591 use util::test::sample_text;
3592
3593 #[gpui::test]
3594 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3595 init_test(cx, |_| {});
3596 let window = cx.add_window(|cx| {
3597 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3598 Editor::new(EditorMode::Full, buffer, None, cx)
3599 });
3600
3601 let editor = window.root(cx).unwrap();
3602 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3603 let element = EditorElement::new(&editor, style);
3604
3605 let layouts = window
3606 .update(cx, |editor, cx| {
3607 let snapshot = editor.snapshot(cx);
3608 element
3609 .shape_line_numbers(
3610 0..6,
3611 &Default::default(),
3612 DisplayPoint::new(0, 0),
3613 false,
3614 &snapshot,
3615 cx,
3616 )
3617 .0
3618 })
3619 .unwrap();
3620 assert_eq!(layouts.len(), 6);
3621
3622 let relative_rows = window
3623 .update(cx, |editor, cx| {
3624 let snapshot = editor.snapshot(cx);
3625 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3626 })
3627 .unwrap();
3628 assert_eq!(relative_rows[&0], 3);
3629 assert_eq!(relative_rows[&1], 2);
3630 assert_eq!(relative_rows[&2], 1);
3631 // current line has no relative number
3632 assert_eq!(relative_rows[&4], 1);
3633 assert_eq!(relative_rows[&5], 2);
3634
3635 // works if cursor is before screen
3636 let relative_rows = window
3637 .update(cx, |editor, cx| {
3638 let snapshot = editor.snapshot(cx);
3639
3640 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3641 })
3642 .unwrap();
3643 assert_eq!(relative_rows.len(), 3);
3644 assert_eq!(relative_rows[&3], 2);
3645 assert_eq!(relative_rows[&4], 3);
3646 assert_eq!(relative_rows[&5], 4);
3647
3648 // works if cursor is after screen
3649 let relative_rows = window
3650 .update(cx, |editor, cx| {
3651 let snapshot = editor.snapshot(cx);
3652
3653 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3654 })
3655 .unwrap();
3656 assert_eq!(relative_rows.len(), 3);
3657 assert_eq!(relative_rows[&0], 5);
3658 assert_eq!(relative_rows[&1], 4);
3659 assert_eq!(relative_rows[&2], 3);
3660 }
3661
3662 #[gpui::test]
3663 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3664 init_test(cx, |_| {});
3665
3666 let window = cx.add_window(|cx| {
3667 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3668 Editor::new(EditorMode::Full, buffer, None, cx)
3669 });
3670 let editor = window.root(cx).unwrap();
3671 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3672 let mut element = EditorElement::new(&editor, style);
3673
3674 window
3675 .update(cx, |editor, cx| {
3676 editor.cursor_shape = CursorShape::Block;
3677 editor.change_selections(None, cx, |s| {
3678 s.select_ranges([
3679 Point::new(0, 0)..Point::new(1, 0),
3680 Point::new(3, 2)..Point::new(3, 3),
3681 Point::new(5, 6)..Point::new(6, 0),
3682 ]);
3683 });
3684 })
3685 .unwrap();
3686 let state = cx
3687 .update_window(window.into(), |view, cx| {
3688 cx.with_element_context(|cx| {
3689 cx.with_view_id(view.entity_id(), |cx| {
3690 element.compute_layout(
3691 Bounds {
3692 origin: point(px(500.), px(500.)),
3693 size: size(px(500.), px(500.)),
3694 },
3695 cx,
3696 )
3697 })
3698 })
3699 })
3700 .unwrap();
3701
3702 assert_eq!(state.selections.len(), 1);
3703 let local_selections = &state.selections[0].1;
3704 assert_eq!(local_selections.len(), 3);
3705 // moves cursor back one line
3706 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3707 assert_eq!(
3708 local_selections[0].range,
3709 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3710 );
3711
3712 // moves cursor back one column
3713 assert_eq!(
3714 local_selections[1].range,
3715 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3716 );
3717 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3718
3719 // leaves cursor on the max point
3720 assert_eq!(
3721 local_selections[2].range,
3722 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3723 );
3724 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3725
3726 // active lines does not include 1 (even though the range of the selection does)
3727 assert_eq!(
3728 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3729 vec![0, 3, 5, 6]
3730 );
3731
3732 // multi-buffer support
3733 // in DisplayPoint coordinates, this is what we're dealing with:
3734 // 0: [[file
3735 // 1: header]]
3736 // 2: aaaaaa
3737 // 3: bbbbbb
3738 // 4: cccccc
3739 // 5:
3740 // 6: ...
3741 // 7: ffffff
3742 // 8: gggggg
3743 // 9: hhhhhh
3744 // 10:
3745 // 11: [[file
3746 // 12: header]]
3747 // 13: bbbbbb
3748 // 14: cccccc
3749 // 15: dddddd
3750 let window = cx.add_window(|cx| {
3751 let buffer = MultiBuffer::build_multi(
3752 [
3753 (
3754 &(sample_text(8, 6, 'a') + "\n"),
3755 vec![
3756 Point::new(0, 0)..Point::new(3, 0),
3757 Point::new(4, 0)..Point::new(7, 0),
3758 ],
3759 ),
3760 (
3761 &(sample_text(8, 6, 'a') + "\n"),
3762 vec![Point::new(1, 0)..Point::new(3, 0)],
3763 ),
3764 ],
3765 cx,
3766 );
3767 Editor::new(EditorMode::Full, buffer, None, cx)
3768 });
3769 let editor = window.root(cx).unwrap();
3770 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3771 let mut element = EditorElement::new(&editor, style);
3772 let _state = window.update(cx, |editor, cx| {
3773 editor.cursor_shape = CursorShape::Block;
3774 editor.change_selections(None, cx, |s| {
3775 s.select_display_ranges([
3776 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3777 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3778 ]);
3779 });
3780 });
3781
3782 let state = cx
3783 .update_window(window.into(), |view, cx| {
3784 cx.with_element_context(|cx| {
3785 cx.with_view_id(view.entity_id(), |cx| {
3786 element.compute_layout(
3787 Bounds {
3788 origin: point(px(500.), px(500.)),
3789 size: size(px(500.), px(500.)),
3790 },
3791 cx,
3792 )
3793 })
3794 })
3795 })
3796 .unwrap();
3797 assert_eq!(state.selections.len(), 1);
3798 let local_selections = &state.selections[0].1;
3799 assert_eq!(local_selections.len(), 2);
3800
3801 // moves cursor on excerpt boundary back a line
3802 // and doesn't allow selection to bleed through
3803 assert_eq!(
3804 local_selections[0].range,
3805 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3806 );
3807 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3808 // moves cursor on buffer boundary back two lines
3809 // and doesn't allow selection to bleed through
3810 assert_eq!(
3811 local_selections[1].range,
3812 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3813 );
3814 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3815 }
3816
3817 #[gpui::test]
3818 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3819 init_test(cx, |_| {});
3820
3821 let window = cx.add_window(|cx| {
3822 let buffer = MultiBuffer::build_simple("", cx);
3823 Editor::new(EditorMode::Full, buffer, None, cx)
3824 });
3825 let editor = window.root(cx).unwrap();
3826 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3827 window
3828 .update(cx, |editor, cx| {
3829 editor.set_placeholder_text("hello", cx);
3830 editor.insert_blocks(
3831 [BlockProperties {
3832 style: BlockStyle::Fixed,
3833 disposition: BlockDisposition::Above,
3834 height: 3,
3835 position: Anchor::min(),
3836 render: Arc::new(|_| div().into_any()),
3837 }],
3838 None,
3839 cx,
3840 );
3841
3842 // Blur the editor so that it displays placeholder text.
3843 cx.blur();
3844 })
3845 .unwrap();
3846
3847 let mut element = EditorElement::new(&editor, style);
3848 let state = cx
3849 .update_window(window.into(), |view, cx| {
3850 cx.with_element_context(|cx| {
3851 cx.with_view_id(view.entity_id(), |cx| {
3852 element.compute_layout(
3853 Bounds {
3854 origin: point(px(500.), px(500.)),
3855 size: size(px(500.), px(500.)),
3856 },
3857 cx,
3858 )
3859 })
3860 })
3861 })
3862 .unwrap();
3863 let size = state.position_map.size;
3864
3865 assert_eq!(state.position_map.line_layouts.len(), 4);
3866 assert_eq!(
3867 state
3868 .line_numbers
3869 .iter()
3870 .map(Option::is_some)
3871 .collect::<Vec<_>>(),
3872 &[false, false, false, true]
3873 );
3874
3875 // Don't panic.
3876 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3877 cx.update_window(window.into(), |_, cx| {
3878 cx.with_element_context(|cx| element.paint(bounds, &mut (), cx))
3879 })
3880 .unwrap()
3881 }
3882
3883 #[gpui::test]
3884 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3885 const TAB_SIZE: u32 = 4;
3886
3887 let input_text = "\t \t|\t| a b";
3888 let expected_invisibles = vec![
3889 Invisible::Tab {
3890 line_start_offset: 0,
3891 },
3892 Invisible::Whitespace {
3893 line_offset: TAB_SIZE as usize,
3894 },
3895 Invisible::Tab {
3896 line_start_offset: TAB_SIZE as usize + 1,
3897 },
3898 Invisible::Tab {
3899 line_start_offset: TAB_SIZE as usize * 2 + 1,
3900 },
3901 Invisible::Whitespace {
3902 line_offset: TAB_SIZE as usize * 3 + 1,
3903 },
3904 Invisible::Whitespace {
3905 line_offset: TAB_SIZE as usize * 3 + 3,
3906 },
3907 ];
3908 assert_eq!(
3909 expected_invisibles.len(),
3910 input_text
3911 .chars()
3912 .filter(|initial_char| initial_char.is_whitespace())
3913 .count(),
3914 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3915 );
3916
3917 init_test(cx, |s| {
3918 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3919 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3920 });
3921
3922 let actual_invisibles =
3923 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3924
3925 assert_eq!(expected_invisibles, actual_invisibles);
3926 }
3927
3928 #[gpui::test]
3929 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3930 init_test(cx, |s| {
3931 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3932 s.defaults.tab_size = NonZeroU32::new(4);
3933 });
3934
3935 for editor_mode_without_invisibles in [
3936 EditorMode::SingleLine,
3937 EditorMode::AutoHeight { max_lines: 100 },
3938 ] {
3939 let invisibles = collect_invisibles_from_new_editor(
3940 cx,
3941 editor_mode_without_invisibles,
3942 "\t\t\t| | a b",
3943 px(500.0),
3944 );
3945 assert!(invisibles.is_empty(),
3946 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3947 }
3948 }
3949
3950 #[gpui::test]
3951 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3952 let tab_size = 4;
3953 let input_text = "a\tbcd ".repeat(9);
3954 let repeated_invisibles = [
3955 Invisible::Tab {
3956 line_start_offset: 1,
3957 },
3958 Invisible::Whitespace {
3959 line_offset: tab_size as usize + 3,
3960 },
3961 Invisible::Whitespace {
3962 line_offset: tab_size as usize + 4,
3963 },
3964 Invisible::Whitespace {
3965 line_offset: tab_size as usize + 5,
3966 },
3967 ];
3968 let expected_invisibles = std::iter::once(repeated_invisibles)
3969 .cycle()
3970 .take(9)
3971 .flatten()
3972 .collect::<Vec<_>>();
3973 assert_eq!(
3974 expected_invisibles.len(),
3975 input_text
3976 .chars()
3977 .filter(|initial_char| initial_char.is_whitespace())
3978 .count(),
3979 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3980 );
3981 info!("Expected invisibles: {expected_invisibles:?}");
3982
3983 init_test(cx, |_| {});
3984
3985 // Put the same string with repeating whitespace pattern into editors of various size,
3986 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3987 let resize_step = 10.0;
3988 let mut editor_width = 200.0;
3989 while editor_width <= 1000.0 {
3990 update_test_language_settings(cx, |s| {
3991 s.defaults.tab_size = NonZeroU32::new(tab_size);
3992 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3993 s.defaults.preferred_line_length = Some(editor_width as u32);
3994 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3995 });
3996
3997 let actual_invisibles = collect_invisibles_from_new_editor(
3998 cx,
3999 EditorMode::Full,
4000 &input_text,
4001 px(editor_width),
4002 );
4003
4004 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
4005 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
4006 let mut i = 0;
4007 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
4008 i = actual_index;
4009 match expected_invisibles.get(i) {
4010 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
4011 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
4012 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
4013 _ => {
4014 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
4015 }
4016 },
4017 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
4018 }
4019 }
4020 let missing_expected_invisibles = &expected_invisibles[i + 1..];
4021 assert!(
4022 missing_expected_invisibles.is_empty(),
4023 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
4024 );
4025
4026 editor_width += resize_step;
4027 }
4028 }
4029
4030 fn collect_invisibles_from_new_editor(
4031 cx: &mut TestAppContext,
4032 editor_mode: EditorMode,
4033 input_text: &str,
4034 editor_width: Pixels,
4035 ) -> Vec<Invisible> {
4036 info!(
4037 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
4038 editor_width.0
4039 );
4040 let window = cx.add_window(|cx| {
4041 let buffer = MultiBuffer::build_simple(&input_text, cx);
4042 Editor::new(editor_mode, buffer, None, cx)
4043 });
4044 let editor = window.root(cx).unwrap();
4045 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
4046 let mut element = EditorElement::new(&editor, style);
4047 window
4048 .update(cx, |editor, cx| {
4049 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
4050 editor.set_wrap_width(Some(editor_width), cx);
4051 })
4052 .unwrap();
4053 let layout_state = cx
4054 .update_window(window.into(), |_, cx| {
4055 cx.with_element_context(|cx| {
4056 element.compute_layout(
4057 Bounds {
4058 origin: point(px(500.), px(500.)),
4059 size: size(px(500.), px(500.)),
4060 },
4061 cx,
4062 )
4063 })
4064 })
4065 .unwrap();
4066
4067 layout_state
4068 .position_map
4069 .line_layouts
4070 .iter()
4071 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
4072 .flatten()
4073 .cloned()
4074 .collect()
4075 }
4076}
4077
4078pub fn register_action<T: Action>(
4079 view: &View<Editor>,
4080 cx: &mut WindowContext,
4081 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
4082) {
4083 let view = view.clone();
4084 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
4085 let action = action.downcast_ref().unwrap();
4086 if phase == DispatchPhase::Bubble {
4087 view.update(cx, |editor, cx| {
4088 listener(editor, action, cx);
4089 })
4090 }
4091 })
4092}
4093
4094fn compute_auto_height_layout(
4095 editor: &mut Editor,
4096 max_lines: usize,
4097 max_line_number_width: Pixels,
4098 known_dimensions: Size<Option<Pixels>>,
4099 cx: &mut ViewContext<Editor>,
4100) -> Option<Size<Pixels>> {
4101 let width = known_dimensions.width?;
4102 if let Some(height) = known_dimensions.height {
4103 return Some(size(width, height));
4104 }
4105
4106 let style = editor.style.as_ref().unwrap();
4107 let font_id = cx.text_system().resolve_font(&style.text.font());
4108 let font_size = style.text.font_size.to_pixels(cx.rem_size());
4109 let line_height = style.text.line_height_in_pixels(cx.rem_size());
4110 let em_width = cx
4111 .text_system()
4112 .typographic_bounds(font_id, font_size, 'm')
4113 .unwrap()
4114 .size
4115 .width;
4116
4117 let mut snapshot = editor.snapshot(cx);
4118 let gutter_dimensions =
4119 snapshot.gutter_dimensions(font_id, font_size, em_width, max_line_number_width, cx);
4120
4121 editor.gutter_width = gutter_dimensions.width;
4122 let text_width = width - gutter_dimensions.width;
4123 let overscroll = size(em_width, px(0.));
4124
4125 let editor_width = text_width - gutter_dimensions.margin - overscroll.width - em_width;
4126 if editor.set_wrap_width(Some(editor_width), cx) {
4127 snapshot = editor.snapshot(cx);
4128 }
4129
4130 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
4131 let height = scroll_height
4132 .max(line_height)
4133 .min(line_height * max_lines as f32);
4134
4135 Some(size(width, height))
4136}