1use crate::{
2 display_map::{
3 BlockContext, BlockStyle, DisplaySnapshot, FoldStatus, HighlightedChunk, ToDisplayPoint,
4 TransformBlock,
5 },
6 editor_settings::ShowScrollbar,
7 git::{diff_hunk_to_display, DisplayDiffHunk},
8 hover_popover::{
9 self, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 items::BufferSearchHighlights,
12 link_go_to_definition::{
13 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
14 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
15 LinkGoToDefinitionState,
16 },
17 mouse_context_menu,
18 scroll::scroll_amount::ScrollAmount,
19 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
20 HalfPageDown, HalfPageUp, LineDown, LineUp, OpenExcerpts, PageDown, PageUp, Point, SelectPhase,
21 Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
22};
23use anyhow::Result;
24use collections::{BTreeMap, HashMap};
25use git::diff::DiffHunkStatus;
26use gpui::{
27 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
28 AnchorCorner, AnyElement, AvailableSpace, BorrowWindow, Bounds, ContentMask, Corners,
29 CursorStyle, DispatchPhase, Edges, Element, ElementInputHandler, Hsla, InteractiveBounds,
30 InteractiveElement, IntoElement, ModifiersChangedEvent, MouseButton, MouseDownEvent,
31 MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, ScrollDelta, ScrollWheelEvent, ShapedLine,
32 SharedString, Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun,
33 TextStyle, View, ViewContext, WindowContext,
34};
35use itertools::Itertools;
36use language::language_settings::ShowWhitespaceSetting;
37use multi_buffer::Anchor;
38use project::{
39 project_settings::{GitGutterSetting, ProjectSettings},
40 ProjectPath,
41};
42use settings::Settings;
43use smallvec::SmallVec;
44use std::{
45 any::TypeId,
46 borrow::Cow,
47 cmp::{self, Ordering},
48 fmt::Write,
49 iter,
50 ops::Range,
51 sync::Arc,
52};
53use sum_tree::Bias;
54use theme::{ActiveTheme, PlayerColor};
55use ui::prelude::*;
56use ui::{h_stack, ButtonLike, ButtonStyle, IconButton, Tooltip};
57use util::ResultExt;
58use workspace::item::Item;
59
60struct SelectionLayout {
61 head: DisplayPoint,
62 cursor_shape: CursorShape,
63 is_newest: bool,
64 is_local: bool,
65 range: Range<DisplayPoint>,
66 active_rows: Range<u32>,
67}
68
69impl SelectionLayout {
70 fn new<T: ToPoint + ToDisplayPoint + Clone>(
71 selection: Selection<T>,
72 line_mode: bool,
73 cursor_shape: CursorShape,
74 map: &DisplaySnapshot,
75 is_newest: bool,
76 is_local: bool,
77 ) -> Self {
78 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
79 let display_selection = point_selection.map(|p| p.to_display_point(map));
80 let mut range = display_selection.range();
81 let mut head = display_selection.head();
82 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
83 ..map.next_line_boundary(point_selection.end).1.row();
84
85 // vim visual line mode
86 if line_mode {
87 let point_range = map.expand_to_line(point_selection.range());
88 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
89 }
90
91 // any vim visual mode (including line mode)
92 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
93 if head.column() > 0 {
94 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
95 } else if head.row() > 0 && head != map.max_point() {
96 head = map.clip_point(
97 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
98 Bias::Left,
99 );
100 // updating range.end is a no-op unless you're cursor is
101 // on the newline containing a multi-buffer divider
102 // in which case the clip_point may have moved the head up
103 // an additional row.
104 range.end = DisplayPoint::new(head.row() + 1, 0);
105 active_rows.end = head.row();
106 }
107 }
108
109 Self {
110 head,
111 cursor_shape,
112 is_newest,
113 is_local,
114 range,
115 active_rows,
116 }
117 }
118}
119
120pub struct EditorElement {
121 editor: View<Editor>,
122 style: EditorStyle,
123}
124
125impl EditorElement {
126 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
127 Self {
128 editor: editor.clone(),
129 style,
130 }
131 }
132
133 fn register_actions(&self, cx: &mut WindowContext) {
134 let view = &self.editor;
135 view.update(cx, |editor, cx| {
136 for action in editor.editor_actions.iter() {
137 (action)(cx)
138 }
139 });
140
141 crate::rust_analyzer_ext::apply_related_actions(view, cx);
142 register_action(view, cx, Editor::move_left);
143 register_action(view, cx, Editor::move_right);
144 register_action(view, cx, Editor::move_down);
145 register_action(view, cx, Editor::move_up);
146 register_action(view, cx, Editor::cancel);
147 register_action(view, cx, Editor::newline);
148 register_action(view, cx, Editor::newline_above);
149 register_action(view, cx, Editor::newline_below);
150 register_action(view, cx, Editor::backspace);
151 register_action(view, cx, Editor::delete);
152 register_action(view, cx, Editor::tab);
153 register_action(view, cx, Editor::tab_prev);
154 register_action(view, cx, Editor::indent);
155 register_action(view, cx, Editor::outdent);
156 register_action(view, cx, Editor::delete_line);
157 register_action(view, cx, Editor::join_lines);
158 register_action(view, cx, Editor::sort_lines_case_sensitive);
159 register_action(view, cx, Editor::sort_lines_case_insensitive);
160 register_action(view, cx, Editor::reverse_lines);
161 register_action(view, cx, Editor::shuffle_lines);
162 register_action(view, cx, Editor::convert_to_upper_case);
163 register_action(view, cx, Editor::convert_to_lower_case);
164 register_action(view, cx, Editor::convert_to_title_case);
165 register_action(view, cx, Editor::convert_to_snake_case);
166 register_action(view, cx, Editor::convert_to_kebab_case);
167 register_action(view, cx, Editor::convert_to_upper_camel_case);
168 register_action(view, cx, Editor::convert_to_lower_camel_case);
169 register_action(view, cx, Editor::delete_to_previous_word_start);
170 register_action(view, cx, Editor::delete_to_previous_subword_start);
171 register_action(view, cx, Editor::delete_to_next_word_end);
172 register_action(view, cx, Editor::delete_to_next_subword_end);
173 register_action(view, cx, Editor::delete_to_beginning_of_line);
174 register_action(view, cx, Editor::delete_to_end_of_line);
175 register_action(view, cx, Editor::cut_to_end_of_line);
176 register_action(view, cx, Editor::duplicate_line);
177 register_action(view, cx, Editor::move_line_up);
178 register_action(view, cx, Editor::move_line_down);
179 register_action(view, cx, Editor::transpose);
180 register_action(view, cx, Editor::cut);
181 register_action(view, cx, Editor::copy);
182 register_action(view, cx, Editor::paste);
183 register_action(view, cx, Editor::undo);
184 register_action(view, cx, Editor::redo);
185 register_action(view, cx, Editor::move_page_up);
186 register_action(view, cx, Editor::move_page_down);
187 register_action(view, cx, Editor::next_screen);
188 register_action(view, cx, Editor::scroll_cursor_top);
189 register_action(view, cx, Editor::scroll_cursor_center);
190 register_action(view, cx, Editor::scroll_cursor_bottom);
191 register_action(view, cx, |editor, _: &LineDown, cx| {
192 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
193 });
194 register_action(view, cx, |editor, _: &LineUp, cx| {
195 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
196 });
197 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
198 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
199 });
200 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
201 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
202 });
203 register_action(view, cx, |editor, _: &PageDown, cx| {
204 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
205 });
206 register_action(view, cx, |editor, _: &PageUp, cx| {
207 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
208 });
209 register_action(view, cx, Editor::move_to_previous_word_start);
210 register_action(view, cx, Editor::move_to_previous_subword_start);
211 register_action(view, cx, Editor::move_to_next_word_end);
212 register_action(view, cx, Editor::move_to_next_subword_end);
213 register_action(view, cx, Editor::move_to_beginning_of_line);
214 register_action(view, cx, Editor::move_to_end_of_line);
215 register_action(view, cx, Editor::move_to_start_of_paragraph);
216 register_action(view, cx, Editor::move_to_end_of_paragraph);
217 register_action(view, cx, Editor::move_to_beginning);
218 register_action(view, cx, Editor::move_to_end);
219 register_action(view, cx, Editor::select_up);
220 register_action(view, cx, Editor::select_down);
221 register_action(view, cx, Editor::select_left);
222 register_action(view, cx, Editor::select_right);
223 register_action(view, cx, Editor::select_to_previous_word_start);
224 register_action(view, cx, Editor::select_to_previous_subword_start);
225 register_action(view, cx, Editor::select_to_next_word_end);
226 register_action(view, cx, Editor::select_to_next_subword_end);
227 register_action(view, cx, Editor::select_to_beginning_of_line);
228 register_action(view, cx, Editor::select_to_end_of_line);
229 register_action(view, cx, Editor::select_to_start_of_paragraph);
230 register_action(view, cx, Editor::select_to_end_of_paragraph);
231 register_action(view, cx, Editor::select_to_beginning);
232 register_action(view, cx, Editor::select_to_end);
233 register_action(view, cx, Editor::select_all);
234 register_action(view, cx, |editor, action, cx| {
235 editor.select_all_matches(action, cx).log_err();
236 });
237 register_action(view, cx, Editor::select_line);
238 register_action(view, cx, Editor::split_selection_into_lines);
239 register_action(view, cx, Editor::add_selection_above);
240 register_action(view, cx, Editor::add_selection_below);
241 register_action(view, cx, |editor, action, cx| {
242 editor.select_next(action, cx).log_err();
243 });
244 register_action(view, cx, |editor, action, cx| {
245 editor.select_previous(action, cx).log_err();
246 });
247 register_action(view, cx, Editor::toggle_comments);
248 register_action(view, cx, Editor::select_larger_syntax_node);
249 register_action(view, cx, Editor::select_smaller_syntax_node);
250 register_action(view, cx, Editor::move_to_enclosing_bracket);
251 register_action(view, cx, Editor::undo_selection);
252 register_action(view, cx, Editor::redo_selection);
253 register_action(view, cx, Editor::go_to_diagnostic);
254 register_action(view, cx, Editor::go_to_prev_diagnostic);
255 register_action(view, cx, Editor::go_to_hunk);
256 register_action(view, cx, Editor::go_to_prev_hunk);
257 register_action(view, cx, Editor::go_to_definition);
258 register_action(view, cx, Editor::go_to_definition_split);
259 register_action(view, cx, Editor::go_to_type_definition);
260 register_action(view, cx, Editor::go_to_type_definition_split);
261 register_action(view, cx, Editor::fold);
262 register_action(view, cx, Editor::fold_at);
263 register_action(view, cx, Editor::unfold_lines);
264 register_action(view, cx, Editor::unfold_at);
265 register_action(view, cx, Editor::fold_selected_ranges);
266 register_action(view, cx, Editor::show_completions);
267 register_action(view, cx, Editor::toggle_code_actions);
268 register_action(view, cx, Editor::open_excerpts);
269 register_action(view, cx, Editor::toggle_soft_wrap);
270 register_action(view, cx, Editor::toggle_inlay_hints);
271 register_action(view, cx, hover_popover::hover);
272 register_action(view, cx, Editor::reveal_in_finder);
273 register_action(view, cx, Editor::copy_path);
274 register_action(view, cx, Editor::copy_relative_path);
275 register_action(view, cx, Editor::copy_highlight_json);
276 register_action(view, cx, |editor, action, cx| {
277 if let Some(task) = editor.format(action, cx) {
278 task.detach_and_log_err(cx);
279 } else {
280 cx.propagate();
281 }
282 });
283 register_action(view, cx, Editor::restart_language_server);
284 register_action(view, cx, Editor::show_character_palette);
285 register_action(view, cx, |editor, action, cx| {
286 if let Some(task) = editor.confirm_completion(action, cx) {
287 task.detach_and_log_err(cx);
288 } else {
289 cx.propagate();
290 }
291 });
292 register_action(view, cx, |editor, action, cx| {
293 if let Some(task) = editor.confirm_code_action(action, cx) {
294 task.detach_and_log_err(cx);
295 } else {
296 cx.propagate();
297 }
298 });
299 register_action(view, cx, |editor, action, cx| {
300 if let Some(task) = editor.rename(action, cx) {
301 task.detach_and_log_err(cx);
302 } else {
303 cx.propagate();
304 }
305 });
306 register_action(view, cx, |editor, action, cx| {
307 if let Some(task) = editor.confirm_rename(action, cx) {
308 task.detach_and_log_err(cx);
309 } else {
310 cx.propagate();
311 }
312 });
313 register_action(view, cx, |editor, action, cx| {
314 if let Some(task) = editor.find_all_references(action, cx) {
315 task.detach_and_log_err(cx);
316 } else {
317 cx.propagate();
318 }
319 });
320 register_action(view, cx, Editor::next_copilot_suggestion);
321 register_action(view, cx, Editor::previous_copilot_suggestion);
322 register_action(view, cx, Editor::copilot_suggest);
323 register_action(view, cx, Editor::context_menu_first);
324 register_action(view, cx, Editor::context_menu_prev);
325 register_action(view, cx, Editor::context_menu_next);
326 register_action(view, cx, Editor::context_menu_last);
327 }
328
329 fn register_key_listeners(&self, cx: &mut WindowContext) {
330 cx.on_key_event({
331 let editor = self.editor.clone();
332 move |event: &ModifiersChangedEvent, phase, cx| {
333 if phase != DispatchPhase::Bubble {
334 return;
335 }
336
337 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
338 cx.stop_propagation();
339 }
340 }
341 });
342 }
343
344 pub(crate) fn modifiers_changed(
345 editor: &mut Editor,
346 event: &ModifiersChangedEvent,
347 cx: &mut ViewContext<Editor>,
348 ) -> bool {
349 let pending_selection = editor.has_pending_selection();
350
351 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
352 if event.command && !pending_selection {
353 let point = point.clone();
354 let snapshot = editor.snapshot(cx);
355 let kind = point.definition_kind(event.shift);
356
357 show_link_definition(kind, editor, point, snapshot, cx);
358 return false;
359 }
360 }
361
362 {
363 if editor.link_go_to_definition_state.symbol_range.is_some()
364 || !editor.link_go_to_definition_state.definitions.is_empty()
365 {
366 editor.link_go_to_definition_state.symbol_range.take();
367 editor.link_go_to_definition_state.definitions.clear();
368 cx.notify();
369 }
370
371 editor.link_go_to_definition_state.task = None;
372
373 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
374 }
375
376 false
377 }
378
379 fn mouse_left_down(
380 editor: &mut Editor,
381 event: &MouseDownEvent,
382 position_map: &PositionMap,
383 text_bounds: Bounds<Pixels>,
384 gutter_bounds: Bounds<Pixels>,
385 stacking_order: &StackingOrder,
386 cx: &mut ViewContext<Editor>,
387 ) {
388 let mut click_count = event.click_count;
389 let modifiers = event.modifiers;
390
391 if gutter_bounds.contains(&event.position) {
392 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
393 } else if !text_bounds.contains(&event.position) {
394 return;
395 }
396 if !cx.was_top_layer(&event.position, stacking_order) {
397 return;
398 }
399
400 let point_for_position = position_map.point_for_position(text_bounds, event.position);
401 let position = point_for_position.previous_valid;
402 if modifiers.shift && modifiers.alt {
403 editor.select(
404 SelectPhase::BeginColumnar {
405 position,
406 goal_column: point_for_position.exact_unclipped.column(),
407 },
408 cx,
409 );
410 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
411 editor.select(
412 SelectPhase::Extend {
413 position,
414 click_count,
415 },
416 cx,
417 );
418 } else {
419 editor.select(
420 SelectPhase::Begin {
421 position,
422 add: modifiers.alt,
423 click_count,
424 },
425 cx,
426 );
427 }
428
429 cx.stop_propagation();
430 }
431
432 fn mouse_right_down(
433 editor: &mut Editor,
434 event: &MouseDownEvent,
435 position_map: &PositionMap,
436 text_bounds: Bounds<Pixels>,
437 cx: &mut ViewContext<Editor>,
438 ) {
439 if !text_bounds.contains(&event.position) {
440 return;
441 }
442 let point_for_position = position_map.point_for_position(text_bounds, event.position);
443 mouse_context_menu::deploy_context_menu(
444 editor,
445 event.position,
446 point_for_position.previous_valid,
447 cx,
448 );
449 cx.stop_propagation();
450 }
451
452 fn mouse_up(
453 editor: &mut Editor,
454 event: &MouseUpEvent,
455 position_map: &PositionMap,
456 text_bounds: Bounds<Pixels>,
457 stacking_order: &StackingOrder,
458 cx: &mut ViewContext<Editor>,
459 ) {
460 let end_selection = editor.has_pending_selection();
461 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
462
463 if end_selection {
464 editor.select(SelectPhase::End, cx);
465 }
466
467 if !pending_nonempty_selections
468 && event.modifiers.command
469 && text_bounds.contains(&event.position)
470 && cx.was_top_layer(&event.position, stacking_order)
471 {
472 let point = position_map.point_for_position(text_bounds, event.position);
473 let could_be_inlay = point.as_valid().is_none();
474 let split = event.modifiers.alt;
475 if event.modifiers.shift || could_be_inlay {
476 go_to_fetched_type_definition(editor, point, split, cx);
477 } else {
478 go_to_fetched_definition(editor, point, split, cx);
479 }
480
481 cx.stop_propagation();
482 } else if end_selection {
483 cx.stop_propagation();
484 }
485 }
486
487 fn mouse_dragged(
488 editor: &mut Editor,
489 event: &MouseMoveEvent,
490 position_map: &PositionMap,
491 text_bounds: Bounds<Pixels>,
492 _gutter_bounds: Bounds<Pixels>,
493 _stacking_order: &StackingOrder,
494 cx: &mut ViewContext<Editor>,
495 ) {
496 if !editor.has_pending_selection() {
497 return;
498 }
499
500 let point_for_position = position_map.point_for_position(text_bounds, event.position);
501 let mut scroll_delta = gpui::Point::<f32>::default();
502 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
503 let top = text_bounds.origin.y + vertical_margin;
504 let bottom = text_bounds.lower_left().y - vertical_margin;
505 if event.position.y < top {
506 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
507 }
508 if event.position.y > bottom {
509 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
510 }
511
512 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
513 let left = text_bounds.origin.x + horizontal_margin;
514 let right = text_bounds.upper_right().x - horizontal_margin;
515 if event.position.x < left {
516 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
517 }
518 if event.position.x > right {
519 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
520 }
521
522 editor.select(
523 SelectPhase::Update {
524 position: point_for_position.previous_valid,
525 goal_column: point_for_position.exact_unclipped.column(),
526 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
527 .clamp(&gpui::Point::default(), &position_map.scroll_max),
528 },
529 cx,
530 );
531 }
532
533 fn mouse_moved(
534 editor: &mut Editor,
535 event: &MouseMoveEvent,
536 position_map: &PositionMap,
537 text_bounds: Bounds<Pixels>,
538 gutter_bounds: Bounds<Pixels>,
539 stacking_order: &StackingOrder,
540 cx: &mut ViewContext<Editor>,
541 ) {
542 let modifiers = event.modifiers;
543 let text_hovered = text_bounds.contains(&event.position);
544 let gutter_hovered = gutter_bounds.contains(&event.position);
545 let was_top = cx.was_top_layer(&event.position, stacking_order);
546
547 editor.set_gutter_hovered(gutter_hovered, cx);
548
549 // Don't trigger hover popover if mouse is hovering over context menu
550 if text_hovered && was_top {
551 let point_for_position = position_map.point_for_position(text_bounds, event.position);
552
553 match point_for_position.as_valid() {
554 Some(point) => {
555 update_go_to_definition_link(
556 editor,
557 Some(GoToDefinitionTrigger::Text(point)),
558 modifiers.command,
559 modifiers.shift,
560 cx,
561 );
562 hover_at(editor, Some(point), cx);
563 }
564 None => {
565 update_inlay_link_and_hover_points(
566 &position_map.snapshot,
567 point_for_position,
568 editor,
569 modifiers.command,
570 modifiers.shift,
571 cx,
572 );
573 }
574 }
575 } else {
576 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
577 hover_at(editor, None, cx);
578 if gutter_hovered && was_top {
579 cx.stop_propagation();
580 }
581 }
582 }
583
584 fn paint_background(
585 &self,
586 gutter_bounds: Bounds<Pixels>,
587 text_bounds: Bounds<Pixels>,
588 layout: &LayoutState,
589 cx: &mut WindowContext,
590 ) {
591 let bounds = gutter_bounds.union(&text_bounds);
592 let scroll_top =
593 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
594 let gutter_bg = cx.theme().colors().editor_gutter_background;
595 cx.paint_quad(fill(gutter_bounds, gutter_bg));
596 cx.paint_quad(fill(text_bounds, self.style.background));
597
598 if let EditorMode::Full = layout.mode {
599 let mut active_rows = layout.active_rows.iter().peekable();
600 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
601 let mut end_row = *start_row;
602 while active_rows.peek().map_or(false, |r| {
603 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
604 }) {
605 active_rows.next().unwrap();
606 end_row += 1;
607 }
608
609 if !contains_non_empty_selection {
610 let origin = point(
611 bounds.origin.x,
612 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
613 - scroll_top,
614 );
615 let size = size(
616 bounds.size.width,
617 layout.position_map.line_height * (end_row - start_row + 1) as f32,
618 );
619 let active_line_bg = cx.theme().colors().editor_active_line_background;
620 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
621 }
622 }
623
624 if let Some(highlighted_rows) = &layout.highlighted_rows {
625 let origin = point(
626 bounds.origin.x,
627 bounds.origin.y
628 + (layout.position_map.line_height * highlighted_rows.start as f32)
629 - scroll_top,
630 );
631 let size = size(
632 bounds.size.width,
633 layout.position_map.line_height * highlighted_rows.len() as f32,
634 );
635 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
636 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
637 }
638
639 let scroll_left =
640 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
641
642 for (wrap_position, active) in layout.wrap_guides.iter() {
643 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
644 - scroll_left;
645
646 if x < text_bounds.origin.x
647 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
648 {
649 continue;
650 }
651
652 let color = if *active {
653 cx.theme().colors().editor_active_wrap_guide
654 } else {
655 cx.theme().colors().editor_wrap_guide
656 };
657 cx.paint_quad(fill(
658 Bounds {
659 origin: point(x, text_bounds.origin.y),
660 size: size(px(1.), text_bounds.size.height),
661 },
662 color,
663 ));
664 }
665 }
666 }
667
668 fn paint_gutter(
669 &mut self,
670 bounds: Bounds<Pixels>,
671 layout: &mut LayoutState,
672 cx: &mut WindowContext,
673 ) {
674 let line_height = layout.position_map.line_height;
675
676 let scroll_position = layout.position_map.snapshot.scroll_position();
677 let scroll_top = scroll_position.y * line_height;
678
679 let show_gutter = matches!(
680 ProjectSettings::get_global(cx).git.git_gutter,
681 Some(GitGutterSetting::TrackedFiles)
682 );
683
684 if show_gutter {
685 Self::paint_diff_hunks(bounds, layout, cx);
686 }
687
688 for (ix, line) in layout.line_numbers.iter().enumerate() {
689 if let Some(line) = line {
690 let line_origin = bounds.origin
691 + point(
692 bounds.size.width - line.width - layout.gutter_padding,
693 ix as f32 * line_height - (scroll_top % line_height),
694 );
695
696 line.paint(line_origin, line_height, cx).log_err();
697 }
698 }
699
700 cx.with_z_index(1, |cx| {
701 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
702 if let Some(fold_indicator) = fold_indicator {
703 let mut fold_indicator = fold_indicator.into_any_element();
704 let available_space = size(
705 AvailableSpace::MinContent,
706 AvailableSpace::Definite(line_height * 0.55),
707 );
708 let fold_indicator_size = fold_indicator.measure(available_space, cx);
709
710 let position = point(
711 bounds.size.width - layout.gutter_padding,
712 ix as f32 * line_height - (scroll_top % line_height),
713 );
714 let centering_offset = point(
715 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
716 / 2.,
717 (line_height - fold_indicator_size.height) / 2.,
718 );
719 let origin = bounds.origin + position + centering_offset;
720 fold_indicator.draw(origin, available_space, cx);
721 }
722 }
723
724 if let Some(indicator) = layout.code_actions_indicator.take() {
725 let mut button = indicator.button.into_any_element();
726 let available_space = size(
727 AvailableSpace::MinContent,
728 AvailableSpace::Definite(line_height),
729 );
730 let indicator_size = button.measure(available_space, cx);
731
732 let mut x = Pixels::ZERO;
733 let mut y = indicator.row as f32 * line_height - scroll_top;
734 // Center indicator.
735 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
736 y += (line_height - indicator_size.height) / 2.;
737
738 button.draw(bounds.origin + point(x, y), available_space, cx);
739 }
740 });
741 }
742
743 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
744 let line_height = layout.position_map.line_height;
745
746 let scroll_position = layout.position_map.snapshot.scroll_position();
747 let scroll_top = scroll_position.y * line_height;
748
749 for hunk in &layout.display_hunks {
750 let (display_row_range, status) = match hunk {
751 //TODO: This rendering is entirely a horrible hack
752 &DisplayDiffHunk::Folded { display_row: row } => {
753 let start_y = row as f32 * line_height - scroll_top;
754 let end_y = start_y + line_height;
755
756 let width = 0.275 * line_height;
757 let highlight_origin = bounds.origin + point(-width, start_y);
758 let highlight_size = size(width * 2., end_y - start_y);
759 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
760 cx.paint_quad(quad(
761 highlight_bounds,
762 Corners::all(1. * line_height),
763 cx.theme().status().modified,
764 Edges::default(),
765 transparent_black(),
766 ));
767
768 continue;
769 }
770
771 DisplayDiffHunk::Unfolded {
772 display_row_range,
773 status,
774 } => (display_row_range, status),
775 };
776
777 let color = match status {
778 DiffHunkStatus::Added => cx.theme().status().created,
779 DiffHunkStatus::Modified => cx.theme().status().modified,
780
781 //TODO: This rendering is entirely a horrible hack
782 DiffHunkStatus::Removed => {
783 let row = display_row_range.start;
784
785 let offset = line_height / 2.;
786 let start_y = row as f32 * line_height - offset - scroll_top;
787 let end_y = start_y + line_height;
788
789 let width = 0.275 * line_height;
790 let highlight_origin = bounds.origin + point(-width, start_y);
791 let highlight_size = size(width * 2., end_y - start_y);
792 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
793 cx.paint_quad(quad(
794 highlight_bounds,
795 Corners::all(1. * line_height),
796 cx.theme().status().deleted,
797 Edges::default(),
798 transparent_black(),
799 ));
800
801 continue;
802 }
803 };
804
805 let start_row = display_row_range.start;
806 let end_row = display_row_range.end;
807 // If we're in a multibuffer, row range span might include an
808 // excerpt header, so if we were to draw the marker straight away,
809 // the hunk might include the rows of that header.
810 // Making the range inclusive doesn't quite cut it, as we rely on the exclusivity for the soft wrap.
811 // Instead, we simply check whether the range we're dealing with includes
812 // any excerpt headers and if so, we stop painting the diff hunk on the first row of that header.
813 let end_row_in_current_excerpt = layout
814 .position_map
815 .snapshot
816 .blocks_in_range(start_row..end_row)
817 .find_map(|(start_row, block)| {
818 if matches!(block, TransformBlock::ExcerptHeader { .. }) {
819 Some(start_row)
820 } else {
821 None
822 }
823 })
824 .unwrap_or(end_row);
825
826 let start_y = start_row as f32 * line_height - scroll_top;
827 let end_y = end_row_in_current_excerpt as f32 * line_height - scroll_top;
828
829 let width = 0.275 * line_height;
830 let highlight_origin = bounds.origin + point(-width, start_y);
831 let highlight_size = size(width * 2., end_y - start_y);
832 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
833 cx.paint_quad(quad(
834 highlight_bounds,
835 Corners::all(0.05 * line_height),
836 color,
837 Edges::default(),
838 transparent_black(),
839 ));
840 }
841 }
842
843 fn paint_text(
844 &mut self,
845 text_bounds: Bounds<Pixels>,
846 layout: &mut LayoutState,
847 cx: &mut WindowContext,
848 ) {
849 let start_row = layout.visible_display_row_range.start;
850 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
851 let line_end_overshoot = 0.15 * layout.position_map.line_height;
852 let whitespace_setting = self
853 .editor
854 .read(cx)
855 .buffer
856 .read(cx)
857 .settings_at(0, cx)
858 .show_whitespaces;
859
860 cx.with_content_mask(
861 Some(ContentMask {
862 bounds: text_bounds,
863 }),
864 |cx| {
865 let interactive_text_bounds = InteractiveBounds {
866 bounds: text_bounds,
867 stacking_order: cx.stacking_order().clone(),
868 };
869 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
870 if self
871 .editor
872 .read(cx)
873 .link_go_to_definition_state
874 .definitions
875 .is_empty()
876 {
877 cx.set_cursor_style(CursorStyle::IBeam);
878 } else {
879 cx.set_cursor_style(CursorStyle::PointingHand);
880 }
881 }
882
883 let fold_corner_radius = 0.15 * layout.position_map.line_height;
884 cx.with_element_id(Some("folds"), |cx| {
885 let snapshot = &layout.position_map.snapshot;
886
887 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
888 let fold_range = fold.range.clone();
889 let display_range = fold.range.start.to_display_point(&snapshot)
890 ..fold.range.end.to_display_point(&snapshot);
891 debug_assert_eq!(display_range.start.row(), display_range.end.row());
892 let row = display_range.start.row();
893 debug_assert!(row < layout.visible_display_row_range.end);
894 let Some(line_layout) = &layout
895 .position_map
896 .line_layouts
897 .get((row - layout.visible_display_row_range.start) as usize)
898 .map(|l| &l.line)
899 else {
900 continue;
901 };
902
903 let start_x = content_origin.x
904 + line_layout.x_for_index(display_range.start.column() as usize)
905 - layout.position_map.scroll_position.x;
906 let start_y = content_origin.y
907 + row as f32 * layout.position_map.line_height
908 - layout.position_map.scroll_position.y;
909 let end_x = content_origin.x
910 + line_layout.x_for_index(display_range.end.column() as usize)
911 - layout.position_map.scroll_position.x;
912
913 let fold_bounds = Bounds {
914 origin: point(start_x, start_y),
915 size: size(end_x - start_x, layout.position_map.line_height),
916 };
917
918 let fold_background = cx.with_z_index(1, |cx| {
919 div()
920 .id(fold.id)
921 .size_full()
922 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
923 .on_click(cx.listener_for(
924 &self.editor,
925 move |editor: &mut Editor, _, cx| {
926 editor.unfold_ranges(
927 [fold_range.start..fold_range.end],
928 true,
929 false,
930 cx,
931 );
932 cx.stop_propagation();
933 },
934 ))
935 .draw_and_update_state(
936 fold_bounds.origin,
937 fold_bounds.size,
938 cx,
939 |fold_element_state, cx| {
940 if fold_element_state.is_active() {
941 cx.theme().colors().ghost_element_active
942 } else if fold_bounds.contains(&cx.mouse_position()) {
943 cx.theme().colors().ghost_element_hover
944 } else {
945 cx.theme().colors().ghost_element_background
946 }
947 },
948 )
949 });
950
951 self.paint_highlighted_range(
952 display_range.clone(),
953 fold_background,
954 fold_corner_radius,
955 fold_corner_radius * 2.,
956 layout,
957 content_origin,
958 text_bounds,
959 cx,
960 );
961 }
962 });
963
964 for (range, color) in &layout.highlighted_ranges {
965 self.paint_highlighted_range(
966 range.clone(),
967 *color,
968 Pixels::ZERO,
969 line_end_overshoot,
970 layout,
971 content_origin,
972 text_bounds,
973 cx,
974 );
975 }
976
977 let mut cursors = SmallVec::<[Cursor; 32]>::new();
978 let corner_radius = 0.15 * layout.position_map.line_height;
979 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
980
981 for (selection_style, selections) in &layout.selections {
982 for selection in selections {
983 self.paint_highlighted_range(
984 selection.range.clone(),
985 selection_style.selection,
986 corner_radius,
987 corner_radius * 2.,
988 layout,
989 content_origin,
990 text_bounds,
991 cx,
992 );
993
994 if selection.is_local && !selection.range.is_empty() {
995 invisible_display_ranges.push(selection.range.clone());
996 }
997
998 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
999 let cursor_position = selection.head;
1000 if layout
1001 .visible_display_row_range
1002 .contains(&cursor_position.row())
1003 {
1004 let cursor_row_layout = &layout.position_map.line_layouts
1005 [(cursor_position.row() - start_row) as usize]
1006 .line;
1007 let cursor_column = cursor_position.column() as usize;
1008
1009 let cursor_character_x =
1010 cursor_row_layout.x_for_index(cursor_column);
1011 let mut block_width = cursor_row_layout
1012 .x_for_index(cursor_column + 1)
1013 - cursor_character_x;
1014 if block_width == Pixels::ZERO {
1015 block_width = layout.position_map.em_width;
1016 }
1017 let block_text = if let CursorShape::Block = selection.cursor_shape
1018 {
1019 layout
1020 .position_map
1021 .snapshot
1022 .chars_at(cursor_position)
1023 .next()
1024 .and_then(|(character, _)| {
1025 let text = if character == '\n' {
1026 SharedString::from(" ")
1027 } else {
1028 SharedString::from(character.to_string())
1029 };
1030 let len = text.len();
1031 cx.text_system()
1032 .shape_line(
1033 text,
1034 cursor_row_layout.font_size,
1035 &[TextRun {
1036 len,
1037 font: self.style.text.font(),
1038 color: self.style.background,
1039 background_color: None,
1040 underline: None,
1041 }],
1042 )
1043 .log_err()
1044 })
1045 } else {
1046 None
1047 };
1048
1049 let x = cursor_character_x - layout.position_map.scroll_position.x;
1050 let y = cursor_position.row() as f32
1051 * layout.position_map.line_height
1052 - layout.position_map.scroll_position.y;
1053 if selection.is_newest {
1054 self.editor.update(cx, |editor, _| {
1055 editor.pixel_position_of_newest_cursor = Some(point(
1056 text_bounds.origin.x + x + block_width / 2.,
1057 text_bounds.origin.y
1058 + y
1059 + layout.position_map.line_height / 2.,
1060 ))
1061 });
1062 }
1063 cursors.push(Cursor {
1064 color: selection_style.cursor,
1065 block_width,
1066 origin: point(x, y),
1067 line_height: layout.position_map.line_height,
1068 shape: selection.cursor_shape,
1069 block_text,
1070 });
1071 }
1072 }
1073 }
1074 }
1075
1076 for (ix, line_with_invisibles) in
1077 layout.position_map.line_layouts.iter().enumerate()
1078 {
1079 let row = start_row + ix as u32;
1080 line_with_invisibles.draw(
1081 layout,
1082 row,
1083 content_origin,
1084 whitespace_setting,
1085 &invisible_display_ranges,
1086 cx,
1087 )
1088 }
1089
1090 cx.with_z_index(0, |cx| {
1091 for cursor in cursors {
1092 cursor.paint(content_origin, cx);
1093 }
1094 });
1095 },
1096 )
1097 }
1098
1099 fn paint_overlays(
1100 &mut self,
1101 text_bounds: Bounds<Pixels>,
1102 layout: &mut LayoutState,
1103 cx: &mut WindowContext,
1104 ) {
1105 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1106 let start_row = layout.visible_display_row_range.start;
1107 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1108 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1109 let context_menu_size = context_menu.measure(available_space, cx);
1110
1111 let cursor_row_layout =
1112 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1113 let x = cursor_row_layout.x_for_index(position.column() as usize)
1114 - layout.position_map.scroll_position.x;
1115 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1116 - layout.position_map.scroll_position.y;
1117 let mut list_origin = content_origin + point(x, y);
1118 let list_width = context_menu_size.width;
1119 let list_height = context_menu_size.height;
1120
1121 // Snap the right edge of the list to the right edge of the window if
1122 // its horizontal bounds overflow.
1123 if list_origin.x + list_width > cx.viewport_size().width {
1124 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1125 }
1126
1127 if list_origin.y + list_height > text_bounds.lower_right().y {
1128 list_origin.y -= layout.position_map.line_height + list_height;
1129 }
1130
1131 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1132 }
1133
1134 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1135 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1136
1137 // This is safe because we check on layout whether the required row is available
1138 let hovered_row_layout =
1139 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1140
1141 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1142 // height. This is the size we will use to decide whether to render popovers above or below
1143 // the hovered line.
1144 let first_size = hover_popovers[0].measure(available_space, cx);
1145 let height_to_reserve =
1146 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1147
1148 // Compute Hovered Point
1149 let x = hovered_row_layout.x_for_index(position.column() as usize)
1150 - layout.position_map.scroll_position.x;
1151 let y = position.row() as f32 * layout.position_map.line_height
1152 - layout.position_map.scroll_position.y;
1153 let hovered_point = content_origin + point(x, y);
1154
1155 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1156 // There is enough space above. Render popovers above the hovered point
1157 let mut current_y = hovered_point.y;
1158 for mut hover_popover in hover_popovers {
1159 let size = hover_popover.measure(available_space, cx);
1160 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1161
1162 let x_out_of_bounds =
1163 text_bounds.upper_right().x - (popover_origin.x + size.width);
1164 if x_out_of_bounds < Pixels::ZERO {
1165 popover_origin.x = popover_origin.x + x_out_of_bounds;
1166 }
1167
1168 cx.break_content_mask(|cx| {
1169 hover_popover.draw(popover_origin, available_space, cx)
1170 });
1171
1172 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1173 }
1174 } else {
1175 // There is not enough space above. Render popovers below the hovered point
1176 let mut current_y = hovered_point.y + layout.position_map.line_height;
1177 for mut hover_popover in hover_popovers {
1178 let size = hover_popover.measure(available_space, cx);
1179 let mut popover_origin = point(hovered_point.x, current_y);
1180
1181 let x_out_of_bounds =
1182 text_bounds.upper_right().x - (popover_origin.x + size.width);
1183 if x_out_of_bounds < Pixels::ZERO {
1184 popover_origin.x = popover_origin.x + x_out_of_bounds;
1185 }
1186
1187 hover_popover.draw(popover_origin, available_space, cx);
1188
1189 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1190 }
1191 }
1192 }
1193
1194 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1195 let element = overlay()
1196 .position(mouse_context_menu.position)
1197 .child(mouse_context_menu.context_menu.clone())
1198 .anchor(AnchorCorner::TopLeft)
1199 .snap_to_window();
1200 element.into_any().draw(
1201 gpui::Point::default(),
1202 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1203 cx,
1204 );
1205 }
1206 }
1207
1208 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1209 bounds.upper_right().x - self.style.scrollbar_width
1210 }
1211
1212 fn paint_scrollbar(
1213 &mut self,
1214 bounds: Bounds<Pixels>,
1215 layout: &mut LayoutState,
1216 cx: &mut WindowContext,
1217 ) {
1218 if layout.mode != EditorMode::Full {
1219 return;
1220 }
1221
1222 // If a drag took place after we started dragging the scrollbar,
1223 // cancel the scrollbar drag.
1224 if cx.has_active_drag() {
1225 self.editor.update(cx, |editor, cx| {
1226 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1227 });
1228 }
1229
1230 let top = bounds.origin.y;
1231 let bottom = bounds.lower_left().y;
1232 let right = bounds.lower_right().x;
1233 let left = self.scrollbar_left(&bounds);
1234 let row_range = layout.scrollbar_row_range.clone();
1235 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1236
1237 let mut height = bounds.size.height;
1238 let mut first_row_y_offset = px(0.0);
1239
1240 // Impose a minimum height on the scrollbar thumb
1241 let row_height = height / max_row;
1242 let min_thumb_height = layout.position_map.line_height;
1243 let thumb_height = (row_range.end - row_range.start) * row_height;
1244 if thumb_height < min_thumb_height {
1245 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1246 height -= min_thumb_height - thumb_height;
1247 }
1248
1249 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1250
1251 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1252 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1253 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1254 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1255
1256 if layout.show_scrollbars {
1257 cx.paint_quad(quad(
1258 track_bounds,
1259 Corners::default(),
1260 cx.theme().colors().scrollbar_track_background,
1261 Edges {
1262 top: Pixels::ZERO,
1263 right: Pixels::ZERO,
1264 bottom: Pixels::ZERO,
1265 left: px(1.),
1266 },
1267 cx.theme().colors().scrollbar_track_border,
1268 ));
1269 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1270 if layout.is_singleton && scrollbar_settings.selections {
1271 let start_anchor = Anchor::min();
1272 let end_anchor = Anchor::max();
1273 let background_ranges = self
1274 .editor
1275 .read(cx)
1276 .background_highlight_row_ranges::<BufferSearchHighlights>(
1277 start_anchor..end_anchor,
1278 &layout.position_map.snapshot,
1279 50000,
1280 );
1281 for range in background_ranges {
1282 let start_y = y_for_row(range.start().row() as f32);
1283 let mut end_y = y_for_row(range.end().row() as f32);
1284 if end_y - start_y < px(1.) {
1285 end_y = start_y + px(1.);
1286 }
1287 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1288 cx.paint_quad(quad(
1289 bounds,
1290 Corners::default(),
1291 cx.theme().status().info,
1292 Edges {
1293 top: Pixels::ZERO,
1294 right: px(1.),
1295 bottom: Pixels::ZERO,
1296 left: px(1.),
1297 },
1298 cx.theme().colors().scrollbar_thumb_border,
1299 ));
1300 }
1301 }
1302
1303 if layout.is_singleton && scrollbar_settings.git_diff {
1304 for hunk in layout
1305 .position_map
1306 .snapshot
1307 .buffer_snapshot
1308 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1309 {
1310 let start_display = Point::new(hunk.buffer_range.start, 0)
1311 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1312 let end_display = Point::new(hunk.buffer_range.end, 0)
1313 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1314 let start_y = y_for_row(start_display.row() as f32);
1315 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1316 y_for_row((end_display.row() + 1) as f32)
1317 } else {
1318 y_for_row((end_display.row()) as f32)
1319 };
1320
1321 if end_y - start_y < px(1.) {
1322 end_y = start_y + px(1.);
1323 }
1324 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1325
1326 let color = match hunk.status() {
1327 DiffHunkStatus::Added => cx.theme().status().created,
1328 DiffHunkStatus::Modified => cx.theme().status().modified,
1329 DiffHunkStatus::Removed => cx.theme().status().deleted,
1330 };
1331 cx.paint_quad(quad(
1332 bounds,
1333 Corners::default(),
1334 color,
1335 Edges {
1336 top: Pixels::ZERO,
1337 right: px(1.),
1338 bottom: Pixels::ZERO,
1339 left: px(1.),
1340 },
1341 cx.theme().colors().scrollbar_thumb_border,
1342 ));
1343 }
1344 }
1345
1346 cx.paint_quad(quad(
1347 thumb_bounds,
1348 Corners::default(),
1349 cx.theme().colors().scrollbar_thumb_background,
1350 Edges {
1351 top: Pixels::ZERO,
1352 right: px(1.),
1353 bottom: Pixels::ZERO,
1354 left: px(1.),
1355 },
1356 cx.theme().colors().scrollbar_thumb_border,
1357 ));
1358 }
1359
1360 let interactive_track_bounds = InteractiveBounds {
1361 bounds: track_bounds,
1362 stacking_order: cx.stacking_order().clone(),
1363 };
1364 let mut mouse_position = cx.mouse_position();
1365 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1366 cx.set_cursor_style(CursorStyle::Arrow);
1367 }
1368
1369 cx.on_mouse_event({
1370 let editor = self.editor.clone();
1371 move |event: &MouseMoveEvent, phase, cx| {
1372 if phase == DispatchPhase::Capture {
1373 return;
1374 }
1375
1376 editor.update(cx, |editor, cx| {
1377 if event.pressed_button == Some(MouseButton::Left)
1378 && editor.scroll_manager.is_dragging_scrollbar()
1379 {
1380 let y = mouse_position.y;
1381 let new_y = event.position.y;
1382 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1383 let mut position = editor.scroll_position(cx);
1384 position.y += (new_y - y) * (max_row as f32) / height;
1385 if position.y < 0.0 {
1386 position.y = 0.0;
1387 }
1388 editor.set_scroll_position(position, cx);
1389 }
1390
1391 mouse_position = event.position;
1392 cx.stop_propagation();
1393 } else {
1394 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1395 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1396 editor.scroll_manager.show_scrollbar(cx);
1397 }
1398 }
1399 })
1400 }
1401 });
1402
1403 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1404 cx.on_mouse_event({
1405 let editor = self.editor.clone();
1406 move |_: &MouseUpEvent, phase, cx| {
1407 if phase == DispatchPhase::Capture {
1408 return;
1409 }
1410
1411 editor.update(cx, |editor, cx| {
1412 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1413 cx.stop_propagation();
1414 });
1415 }
1416 });
1417 } else {
1418 cx.on_mouse_event({
1419 let editor = self.editor.clone();
1420 move |event: &MouseDownEvent, phase, cx| {
1421 if phase == DispatchPhase::Capture {
1422 return;
1423 }
1424
1425 editor.update(cx, |editor, cx| {
1426 if track_bounds.contains(&event.position) {
1427 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1428
1429 let y = event.position.y;
1430 if y < thumb_top || thumb_bottom < y {
1431 let center_row =
1432 ((y - top) * max_row as f32 / height).round() as u32;
1433 let top_row = center_row
1434 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1435 let mut position = editor.scroll_position(cx);
1436 position.y = top_row as f32;
1437 editor.set_scroll_position(position, cx);
1438 } else {
1439 editor.scroll_manager.show_scrollbar(cx);
1440 }
1441
1442 cx.stop_propagation();
1443 }
1444 });
1445 }
1446 });
1447 }
1448 }
1449
1450 #[allow(clippy::too_many_arguments)]
1451 fn paint_highlighted_range(
1452 &self,
1453 range: Range<DisplayPoint>,
1454 color: Hsla,
1455 corner_radius: Pixels,
1456 line_end_overshoot: Pixels,
1457 layout: &LayoutState,
1458 content_origin: gpui::Point<Pixels>,
1459 bounds: Bounds<Pixels>,
1460 cx: &mut WindowContext,
1461 ) {
1462 let start_row = layout.visible_display_row_range.start;
1463 let end_row = layout.visible_display_row_range.end;
1464 if range.start != range.end {
1465 let row_range = if range.end.column() == 0 {
1466 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1467 } else {
1468 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1469 };
1470
1471 let highlighted_range = HighlightedRange {
1472 color,
1473 line_height: layout.position_map.line_height,
1474 corner_radius,
1475 start_y: content_origin.y
1476 + row_range.start as f32 * layout.position_map.line_height
1477 - layout.position_map.scroll_position.y,
1478 lines: row_range
1479 .into_iter()
1480 .map(|row| {
1481 let line_layout =
1482 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1483 HighlightedRangeLine {
1484 start_x: if row == range.start.row() {
1485 content_origin.x
1486 + line_layout.x_for_index(range.start.column() as usize)
1487 - layout.position_map.scroll_position.x
1488 } else {
1489 content_origin.x - layout.position_map.scroll_position.x
1490 },
1491 end_x: if row == range.end.row() {
1492 content_origin.x
1493 + line_layout.x_for_index(range.end.column() as usize)
1494 - layout.position_map.scroll_position.x
1495 } else {
1496 content_origin.x + line_layout.width + line_end_overshoot
1497 - layout.position_map.scroll_position.x
1498 },
1499 }
1500 })
1501 .collect(),
1502 };
1503
1504 highlighted_range.paint(bounds, cx);
1505 }
1506 }
1507
1508 fn paint_blocks(
1509 &mut self,
1510 bounds: Bounds<Pixels>,
1511 layout: &mut LayoutState,
1512 cx: &mut WindowContext,
1513 ) {
1514 let scroll_position = layout.position_map.snapshot.scroll_position();
1515 let scroll_left = scroll_position.x * layout.position_map.em_width;
1516 let scroll_top = scroll_position.y * layout.position_map.line_height;
1517
1518 for mut block in layout.blocks.drain(..) {
1519 let mut origin = bounds.origin
1520 + point(
1521 Pixels::ZERO,
1522 block.row as f32 * layout.position_map.line_height - scroll_top,
1523 );
1524 if !matches!(block.style, BlockStyle::Sticky) {
1525 origin += point(-scroll_left, Pixels::ZERO);
1526 }
1527 block.element.draw(origin, block.available_space, cx);
1528 }
1529 }
1530
1531 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1532 let style = &self.style;
1533 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1534 let layout = cx
1535 .text_system()
1536 .shape_line(
1537 SharedString::from(" ".repeat(column)),
1538 font_size,
1539 &[TextRun {
1540 len: column,
1541 font: style.text.font(),
1542 color: Hsla::default(),
1543 background_color: None,
1544 underline: None,
1545 }],
1546 )
1547 .unwrap();
1548
1549 layout.width
1550 }
1551
1552 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1553 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1554 self.column_pixels(digit_count, cx)
1555 }
1556
1557 //Folds contained in a hunk are ignored apart from shrinking visual size
1558 //If a fold contains any hunks then that fold line is marked as modified
1559 fn layout_git_gutters(
1560 &self,
1561 display_rows: Range<u32>,
1562 snapshot: &EditorSnapshot,
1563 ) -> Vec<DisplayDiffHunk> {
1564 let buffer_snapshot = &snapshot.buffer_snapshot;
1565
1566 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1567 .to_point(snapshot)
1568 .row;
1569 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1570 .to_point(snapshot)
1571 .row;
1572
1573 buffer_snapshot
1574 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1575 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1576 .dedup()
1577 .collect()
1578 }
1579
1580 fn calculate_relative_line_numbers(
1581 &self,
1582 snapshot: &EditorSnapshot,
1583 rows: &Range<u32>,
1584 relative_to: Option<u32>,
1585 ) -> HashMap<u32, u32> {
1586 let mut relative_rows: HashMap<u32, u32> = Default::default();
1587 let Some(relative_to) = relative_to else {
1588 return relative_rows;
1589 };
1590
1591 let start = rows.start.min(relative_to);
1592 let end = rows.end.max(relative_to);
1593
1594 let buffer_rows = snapshot
1595 .buffer_rows(start)
1596 .take(1 + (end - start) as usize)
1597 .collect::<Vec<_>>();
1598
1599 let head_idx = relative_to - start;
1600 let mut delta = 1;
1601 let mut i = head_idx + 1;
1602 while i < buffer_rows.len() as u32 {
1603 if buffer_rows[i as usize].is_some() {
1604 if rows.contains(&(i + start)) {
1605 relative_rows.insert(i + start, delta);
1606 }
1607 delta += 1;
1608 }
1609 i += 1;
1610 }
1611 delta = 1;
1612 i = head_idx.min(buffer_rows.len() as u32 - 1);
1613 while i > 0 && buffer_rows[i as usize].is_none() {
1614 i -= 1;
1615 }
1616
1617 while i > 0 {
1618 i -= 1;
1619 if buffer_rows[i as usize].is_some() {
1620 if rows.contains(&(i + start)) {
1621 relative_rows.insert(i + start, delta);
1622 }
1623 delta += 1;
1624 }
1625 }
1626
1627 relative_rows
1628 }
1629
1630 fn shape_line_numbers(
1631 &self,
1632 rows: Range<u32>,
1633 active_rows: &BTreeMap<u32, bool>,
1634 newest_selection_head: DisplayPoint,
1635 is_singleton: bool,
1636 snapshot: &EditorSnapshot,
1637 cx: &ViewContext<Editor>,
1638 ) -> (
1639 Vec<Option<ShapedLine>>,
1640 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1641 ) {
1642 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1643 let include_line_numbers = snapshot.mode == EditorMode::Full;
1644 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1645 let mut fold_statuses = Vec::with_capacity(rows.len());
1646 let mut line_number = String::new();
1647 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1648 let relative_to = if is_relative {
1649 Some(newest_selection_head.row())
1650 } else {
1651 None
1652 };
1653
1654 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1655
1656 for (ix, row) in snapshot
1657 .buffer_rows(rows.start)
1658 .take((rows.end - rows.start) as usize)
1659 .enumerate()
1660 {
1661 let display_row = rows.start + ix as u32;
1662 let (active, color) = if active_rows.contains_key(&display_row) {
1663 (true, cx.theme().colors().editor_active_line_number)
1664 } else {
1665 (false, cx.theme().colors().editor_line_number)
1666 };
1667 if let Some(buffer_row) = row {
1668 if include_line_numbers {
1669 line_number.clear();
1670 let default_number = buffer_row + 1;
1671 let number = relative_rows
1672 .get(&(ix as u32 + rows.start))
1673 .unwrap_or(&default_number);
1674 write!(&mut line_number, "{}", number).unwrap();
1675 let run = TextRun {
1676 len: line_number.len(),
1677 font: self.style.text.font(),
1678 color,
1679 background_color: None,
1680 underline: None,
1681 };
1682 let shaped_line = cx
1683 .text_system()
1684 .shape_line(line_number.clone().into(), font_size, &[run])
1685 .unwrap();
1686 shaped_line_numbers.push(Some(shaped_line));
1687 fold_statuses.push(
1688 is_singleton
1689 .then(|| {
1690 snapshot
1691 .fold_for_line(buffer_row)
1692 .map(|fold_status| (fold_status, buffer_row, active))
1693 })
1694 .flatten(),
1695 )
1696 }
1697 } else {
1698 fold_statuses.push(None);
1699 shaped_line_numbers.push(None);
1700 }
1701 }
1702
1703 (shaped_line_numbers, fold_statuses)
1704 }
1705
1706 fn layout_lines(
1707 &self,
1708 rows: Range<u32>,
1709 line_number_layouts: &[Option<ShapedLine>],
1710 snapshot: &EditorSnapshot,
1711 cx: &ViewContext<Editor>,
1712 ) -> Vec<LineWithInvisibles> {
1713 if rows.start >= rows.end {
1714 return Vec::new();
1715 }
1716
1717 // Show the placeholder when the editor is empty
1718 if snapshot.is_empty() {
1719 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1720 let placeholder_color = cx.theme().colors().text_placeholder;
1721 let placeholder_text = snapshot.placeholder_text();
1722
1723 let placeholder_lines = placeholder_text
1724 .as_ref()
1725 .map_or("", AsRef::as_ref)
1726 .split('\n')
1727 .skip(rows.start as usize)
1728 .chain(iter::repeat(""))
1729 .take(rows.len());
1730 placeholder_lines
1731 .filter_map(move |line| {
1732 let run = TextRun {
1733 len: line.len(),
1734 font: self.style.text.font(),
1735 color: placeholder_color,
1736 background_color: None,
1737 underline: Default::default(),
1738 };
1739 cx.text_system()
1740 .shape_line(line.to_string().into(), font_size, &[run])
1741 .log_err()
1742 })
1743 .map(|line| LineWithInvisibles {
1744 line,
1745 invisibles: Vec::new(),
1746 })
1747 .collect()
1748 } else {
1749 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1750 LineWithInvisibles::from_chunks(
1751 chunks,
1752 &self.style.text,
1753 MAX_LINE_LEN,
1754 rows.len() as usize,
1755 line_number_layouts,
1756 snapshot.mode,
1757 cx,
1758 )
1759 }
1760 }
1761
1762 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1763 self.editor.update(cx, |editor, cx| {
1764 let snapshot = editor.snapshot(cx);
1765 let style = self.style.clone();
1766
1767 let font_id = cx.text_system().resolve_font(&style.text.font());
1768 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1769 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1770 let em_width = cx
1771 .text_system()
1772 .typographic_bounds(font_id, font_size, 'm')
1773 .unwrap()
1774 .size
1775 .width;
1776 let em_advance = cx
1777 .text_system()
1778 .advance(font_id, font_size, 'm')
1779 .unwrap()
1780 .width;
1781
1782 let gutter_padding;
1783 let gutter_width;
1784 let gutter_margin;
1785 if snapshot.show_gutter {
1786 let descent = cx.text_system().descent(font_id, font_size);
1787
1788 let gutter_padding_factor = 3.5;
1789 gutter_padding = (em_width * gutter_padding_factor).round();
1790 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1791 gutter_margin = -descent;
1792 } else {
1793 gutter_padding = Pixels::ZERO;
1794 gutter_width = Pixels::ZERO;
1795 gutter_margin = Pixels::ZERO;
1796 };
1797
1798 editor.gutter_width = gutter_width;
1799
1800 let text_width = bounds.size.width - gutter_width;
1801 let overscroll = size(em_width, px(0.));
1802 let _snapshot = {
1803 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1804
1805 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1806 let wrap_width = match editor.soft_wrap_mode(cx) {
1807 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1808 SoftWrap::EditorWidth => editor_width,
1809 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1810 };
1811
1812 if editor.set_wrap_width(Some(wrap_width), cx) {
1813 editor.snapshot(cx)
1814 } else {
1815 snapshot
1816 }
1817 };
1818
1819 let wrap_guides = editor
1820 .wrap_guides(cx)
1821 .iter()
1822 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1823 .collect::<SmallVec<[_; 2]>>();
1824
1825 let gutter_size = size(gutter_width, bounds.size.height);
1826 let text_size = size(text_width, bounds.size.height);
1827
1828 let autoscroll_horizontally =
1829 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1830 let mut snapshot = editor.snapshot(cx);
1831
1832 let scroll_position = snapshot.scroll_position();
1833 // The scroll position is a fractional point, the whole number of which represents
1834 // the top of the window in terms of display rows.
1835 let start_row = scroll_position.y as u32;
1836 let height_in_lines = f32::from(bounds.size.height / line_height);
1837 let max_row = snapshot.max_point().row();
1838
1839 // Add 1 to ensure selections bleed off screen
1840 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1841
1842 let start_anchor = if start_row == 0 {
1843 Anchor::min()
1844 } else {
1845 snapshot
1846 .buffer_snapshot
1847 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1848 };
1849 let end_anchor = if end_row > max_row {
1850 Anchor::max()
1851 } else {
1852 snapshot
1853 .buffer_snapshot
1854 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1855 };
1856
1857 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1858 let mut active_rows = BTreeMap::new();
1859 let is_singleton = editor.is_singleton(cx);
1860
1861 let highlighted_rows = editor.highlighted_rows();
1862 let highlighted_ranges = editor.background_highlights_in_range(
1863 start_anchor..end_anchor,
1864 &snapshot.display_snapshot,
1865 cx.theme().colors(),
1866 );
1867
1868 let mut newest_selection_head = None;
1869
1870 if editor.show_local_selections {
1871 let mut local_selections: Vec<Selection<Point>> = editor
1872 .selections
1873 .disjoint_in_range(start_anchor..end_anchor, cx);
1874 local_selections.extend(editor.selections.pending(cx));
1875 let mut layouts = Vec::new();
1876 let newest = editor.selections.newest(cx);
1877 for selection in local_selections.drain(..) {
1878 let is_empty = selection.start == selection.end;
1879 let is_newest = selection == newest;
1880
1881 let layout = SelectionLayout::new(
1882 selection,
1883 editor.selections.line_mode,
1884 editor.cursor_shape,
1885 &snapshot.display_snapshot,
1886 is_newest,
1887 true,
1888 );
1889 if is_newest {
1890 newest_selection_head = Some(layout.head);
1891 }
1892
1893 for row in cmp::max(layout.active_rows.start, start_row)
1894 ..=cmp::min(layout.active_rows.end, end_row)
1895 {
1896 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1897 *contains_non_empty_selection |= !is_empty;
1898 }
1899 layouts.push(layout);
1900 }
1901
1902 let player = if editor.read_only(cx) {
1903 cx.theme().players().read_only()
1904 } else {
1905 style.local_player
1906 };
1907
1908 selections.push((player, layouts));
1909 }
1910
1911 if let Some(collaboration_hub) = &editor.collaboration_hub {
1912 // When following someone, render the local selections in their color.
1913 if let Some(leader_id) = editor.leader_peer_id {
1914 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1915 if let Some(participant_index) = collaboration_hub
1916 .user_participant_indices(cx)
1917 .get(&collaborator.user_id)
1918 {
1919 if let Some((local_selection_style, _)) = selections.first_mut() {
1920 *local_selection_style = cx
1921 .theme()
1922 .players()
1923 .color_for_participant(participant_index.0);
1924 }
1925 }
1926 }
1927 }
1928
1929 let mut remote_selections = HashMap::default();
1930 for selection in snapshot.remote_selections_in_range(
1931 &(start_anchor..end_anchor),
1932 collaboration_hub.as_ref(),
1933 cx,
1934 ) {
1935 let selection_style = if let Some(participant_index) = selection.participant_index {
1936 cx.theme()
1937 .players()
1938 .color_for_participant(participant_index.0)
1939 } else {
1940 cx.theme().players().absent()
1941 };
1942
1943 // Don't re-render the leader's selections, since the local selections
1944 // match theirs.
1945 if Some(selection.peer_id) == editor.leader_peer_id {
1946 continue;
1947 }
1948
1949 remote_selections
1950 .entry(selection.replica_id)
1951 .or_insert((selection_style, Vec::new()))
1952 .1
1953 .push(SelectionLayout::new(
1954 selection.selection,
1955 selection.line_mode,
1956 selection.cursor_shape,
1957 &snapshot.display_snapshot,
1958 false,
1959 false,
1960 ));
1961 }
1962
1963 selections.extend(remote_selections.into_values());
1964 }
1965
1966 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1967 let show_scrollbars = match scrollbar_settings.show {
1968 ShowScrollbar::Auto => {
1969 // Git
1970 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1971 ||
1972 // Selections
1973 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
1974 // Scrollmanager
1975 || editor.scroll_manager.scrollbars_visible()
1976 }
1977 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1978 ShowScrollbar::Always => true,
1979 ShowScrollbar::Never => false,
1980 };
1981
1982 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1983 let newest = editor.selections.newest::<Point>(cx);
1984 SelectionLayout::new(
1985 newest,
1986 editor.selections.line_mode,
1987 editor.cursor_shape,
1988 &snapshot.display_snapshot,
1989 true,
1990 true,
1991 )
1992 .head
1993 });
1994
1995 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1996 start_row..end_row,
1997 &active_rows,
1998 head_for_relative,
1999 is_singleton,
2000 &snapshot,
2001 cx,
2002 );
2003
2004 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2005
2006 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2007
2008 let mut max_visible_line_width = Pixels::ZERO;
2009 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2010 for line_with_invisibles in &line_layouts {
2011 if line_with_invisibles.line.width > max_visible_line_width {
2012 max_visible_line_width = line_with_invisibles.line.width;
2013 }
2014 }
2015
2016 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2017 .unwrap()
2018 .width;
2019 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2020
2021 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2022 self.layout_blocks(
2023 start_row..end_row,
2024 &snapshot,
2025 bounds.size.width,
2026 scroll_width,
2027 gutter_padding,
2028 gutter_width,
2029 em_width,
2030 gutter_width + gutter_margin,
2031 line_height,
2032 &style,
2033 &line_layouts,
2034 editor,
2035 cx,
2036 )
2037 });
2038
2039 let scroll_max = point(
2040 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2041 max_row as f32,
2042 );
2043
2044 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2045
2046 let autoscrolled = if autoscroll_horizontally {
2047 editor.autoscroll_horizontally(
2048 start_row,
2049 text_size.width,
2050 scroll_width,
2051 em_width,
2052 &line_layouts,
2053 cx,
2054 )
2055 } else {
2056 false
2057 };
2058
2059 if clamped || autoscrolled {
2060 snapshot = editor.snapshot(cx);
2061 }
2062
2063 let mut context_menu = None;
2064 let mut code_actions_indicator = None;
2065 if let Some(newest_selection_head) = newest_selection_head {
2066 if (start_row..end_row).contains(&newest_selection_head.row()) {
2067 if editor.context_menu_visible() {
2068 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2069 context_menu =
2070 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2071 }
2072
2073 let active = matches!(
2074 editor.context_menu.read().as_ref(),
2075 Some(crate::ContextMenu::CodeActions(_))
2076 );
2077
2078 code_actions_indicator = editor
2079 .render_code_actions_indicator(&style, active, cx)
2080 .map(|element| CodeActionsIndicator {
2081 row: newest_selection_head.row(),
2082 button: element,
2083 });
2084 }
2085 }
2086
2087 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2088 let max_size = size(
2089 (120. * em_width) // Default size
2090 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2091 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2092 (16. * line_height) // Default size
2093 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2094 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2095 );
2096
2097 let hover = editor.hover_state.render(
2098 &snapshot,
2099 &style,
2100 visible_rows,
2101 max_size,
2102 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2103 cx,
2104 );
2105
2106 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2107 editor.render_fold_indicators(
2108 fold_statuses,
2109 &style,
2110 editor.gutter_hovered,
2111 line_height,
2112 gutter_margin,
2113 cx,
2114 )
2115 });
2116
2117 let invisible_symbol_font_size = font_size / 2.;
2118 let tab_invisible = cx
2119 .text_system()
2120 .shape_line(
2121 "→".into(),
2122 invisible_symbol_font_size,
2123 &[TextRun {
2124 len: "→".len(),
2125 font: self.style.text.font(),
2126 color: cx.theme().colors().editor_invisible,
2127 background_color: None,
2128 underline: None,
2129 }],
2130 )
2131 .unwrap();
2132 let space_invisible = cx
2133 .text_system()
2134 .shape_line(
2135 "•".into(),
2136 invisible_symbol_font_size,
2137 &[TextRun {
2138 len: "•".len(),
2139 font: self.style.text.font(),
2140 color: cx.theme().colors().editor_invisible,
2141 background_color: None,
2142 underline: None,
2143 }],
2144 )
2145 .unwrap();
2146
2147 LayoutState {
2148 mode: snapshot.mode,
2149 position_map: Arc::new(PositionMap {
2150 size: bounds.size,
2151 scroll_position: point(
2152 scroll_position.x * em_width,
2153 scroll_position.y * line_height,
2154 ),
2155 scroll_max,
2156 line_layouts,
2157 line_height,
2158 em_width,
2159 em_advance,
2160 snapshot,
2161 }),
2162 visible_anchor_range: start_anchor..end_anchor,
2163 visible_display_row_range: start_row..end_row,
2164 wrap_guides,
2165 gutter_size,
2166 gutter_padding,
2167 text_size,
2168 scrollbar_row_range,
2169 show_scrollbars,
2170 is_singleton,
2171 max_row,
2172 gutter_margin,
2173 active_rows,
2174 highlighted_rows,
2175 highlighted_ranges,
2176 line_numbers,
2177 display_hunks,
2178 blocks,
2179 selections,
2180 context_menu,
2181 code_actions_indicator,
2182 fold_indicators,
2183 tab_invisible,
2184 space_invisible,
2185 hover_popovers: hover,
2186 }
2187 })
2188 }
2189
2190 #[allow(clippy::too_many_arguments)]
2191 fn layout_blocks(
2192 &self,
2193 rows: Range<u32>,
2194 snapshot: &EditorSnapshot,
2195 editor_width: Pixels,
2196 scroll_width: Pixels,
2197 gutter_padding: Pixels,
2198 gutter_width: Pixels,
2199 em_width: Pixels,
2200 text_x: Pixels,
2201 line_height: Pixels,
2202 style: &EditorStyle,
2203 line_layouts: &[LineWithInvisibles],
2204 editor: &mut Editor,
2205 cx: &mut ViewContext<Editor>,
2206 ) -> (Pixels, Vec<BlockLayout>) {
2207 let mut block_id = 0;
2208 let (fixed_blocks, non_fixed_blocks) = snapshot
2209 .blocks_in_range(rows.clone())
2210 .partition::<Vec<_>, _>(|(_, block)| match block {
2211 TransformBlock::ExcerptHeader { .. } => false,
2212 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2213 });
2214
2215 let render_block = |block: &TransformBlock,
2216 available_space: Size<AvailableSpace>,
2217 block_id: usize,
2218 editor: &mut Editor,
2219 cx: &mut ViewContext<Editor>| {
2220 let mut element = match block {
2221 TransformBlock::Custom(block) => {
2222 let align_to = block
2223 .position()
2224 .to_point(&snapshot.buffer_snapshot)
2225 .to_display_point(snapshot);
2226 let anchor_x = text_x
2227 + if rows.contains(&align_to.row()) {
2228 line_layouts[(align_to.row() - rows.start) as usize]
2229 .line
2230 .x_for_index(align_to.column() as usize)
2231 } else {
2232 layout_line(align_to.row(), snapshot, style, cx)
2233 .unwrap()
2234 .x_for_index(align_to.column() as usize)
2235 };
2236
2237 block.render(&mut BlockContext {
2238 view_context: cx,
2239 anchor_x,
2240 gutter_padding,
2241 line_height,
2242 gutter_width,
2243 em_width,
2244 block_id,
2245 editor_style: &self.style,
2246 })
2247 }
2248
2249 TransformBlock::ExcerptHeader {
2250 buffer,
2251 range,
2252 starts_new_buffer,
2253 ..
2254 } => {
2255 let include_root = editor
2256 .project
2257 .as_ref()
2258 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2259 .unwrap_or_default();
2260
2261 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2262 let jump_path = ProjectPath {
2263 worktree_id: file.worktree_id(cx),
2264 path: file.path.clone(),
2265 };
2266 let jump_anchor = range
2267 .primary
2268 .as_ref()
2269 .map_or(range.context.start, |primary| primary.start);
2270 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2271
2272 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2273 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2274 });
2275
2276 jump_handler
2277 });
2278
2279 let element = if *starts_new_buffer {
2280 let path = buffer.resolve_file_path(cx, include_root);
2281 let mut filename = None;
2282 let mut parent_path = None;
2283 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2284 if let Some(path) = path {
2285 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2286 parent_path = path
2287 .parent()
2288 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2289 }
2290
2291 div()
2292 .id(("path header container", block_id))
2293 .size_full()
2294 .p_1p5()
2295 .child(
2296 h_stack()
2297 .id("path header block")
2298 .py_1p5()
2299 .pl_3()
2300 .pr_2()
2301 .rounded_lg()
2302 .shadow_md()
2303 .border()
2304 .border_color(cx.theme().colors().border)
2305 .bg(cx.theme().colors().editor_subheader_background)
2306 .justify_between()
2307 .hover(|style| style.bg(cx.theme().colors().element_hover))
2308 .child(
2309 h_stack().gap_3().child(
2310 h_stack()
2311 .gap_2()
2312 .child(
2313 filename
2314 .map(SharedString::from)
2315 .unwrap_or_else(|| "untitled".into()),
2316 )
2317 .when_some(parent_path, |then, path| {
2318 then.child(
2319 div().child(path).text_color(
2320 cx.theme().colors().text_muted,
2321 ),
2322 )
2323 }),
2324 ),
2325 )
2326 .when_some(jump_handler, |this, jump_handler| {
2327 this.cursor_pointer()
2328 .tooltip(|cx| {
2329 Tooltip::for_action(
2330 "Jump to Buffer",
2331 &OpenExcerpts,
2332 cx,
2333 )
2334 })
2335 .on_mouse_down(MouseButton::Left, |_, cx| {
2336 cx.stop_propagation()
2337 })
2338 .on_click(jump_handler)
2339 }),
2340 )
2341 } else {
2342 h_stack()
2343 .id(("collapsed context", block_id))
2344 .size_full()
2345 .gap(gutter_padding)
2346 .child(
2347 h_stack()
2348 .justify_end()
2349 .flex_none()
2350 .w(gutter_width - gutter_padding)
2351 .h_full()
2352 .text_buffer(cx)
2353 .text_color(cx.theme().colors().editor_line_number)
2354 .child("..."),
2355 )
2356 .map(|this| {
2357 if let Some(jump_handler) = jump_handler {
2358 this.child(
2359 ButtonLike::new("jump to collapsed context")
2360 .style(ButtonStyle::Transparent)
2361 .full_width()
2362 .on_click(jump_handler)
2363 .tooltip(|cx| {
2364 Tooltip::for_action(
2365 "Jump to Buffer",
2366 &OpenExcerpts,
2367 cx,
2368 )
2369 })
2370 .child(
2371 div()
2372 .h_px()
2373 .w_full()
2374 .bg(cx.theme().colors().border_variant)
2375 .group_hover("", |style| {
2376 style.bg(cx.theme().colors().border)
2377 }),
2378 ),
2379 )
2380 } else {
2381 this.child(div().size_full().bg(gpui::green()))
2382 }
2383 })
2384 };
2385 element.into_any()
2386 }
2387 };
2388
2389 let size = element.measure(available_space, cx);
2390 (element, size)
2391 };
2392
2393 let mut fixed_block_max_width = Pixels::ZERO;
2394 let mut blocks = Vec::new();
2395 for (row, block) in fixed_blocks {
2396 let available_space = size(
2397 AvailableSpace::MinContent,
2398 AvailableSpace::Definite(block.height() as f32 * line_height),
2399 );
2400 let (element, element_size) =
2401 render_block(block, available_space, block_id, editor, cx);
2402 block_id += 1;
2403 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2404 blocks.push(BlockLayout {
2405 row,
2406 element,
2407 available_space,
2408 style: BlockStyle::Fixed,
2409 });
2410 }
2411 for (row, block) in non_fixed_blocks {
2412 let style = match block {
2413 TransformBlock::Custom(block) => block.style(),
2414 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2415 };
2416 let width = match style {
2417 BlockStyle::Sticky => editor_width,
2418 BlockStyle::Flex => editor_width
2419 .max(fixed_block_max_width)
2420 .max(gutter_width + scroll_width),
2421 BlockStyle::Fixed => unreachable!(),
2422 };
2423 let available_space = size(
2424 AvailableSpace::Definite(width),
2425 AvailableSpace::Definite(block.height() as f32 * line_height),
2426 );
2427 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2428 block_id += 1;
2429 blocks.push(BlockLayout {
2430 row,
2431 element,
2432 available_space,
2433 style,
2434 });
2435 }
2436 (
2437 scroll_width.max(fixed_block_max_width - gutter_width),
2438 blocks,
2439 )
2440 }
2441
2442 fn paint_scroll_wheel_listener(
2443 &mut self,
2444 interactive_bounds: &InteractiveBounds,
2445 layout: &LayoutState,
2446 cx: &mut WindowContext,
2447 ) {
2448 cx.on_mouse_event({
2449 let position_map = layout.position_map.clone();
2450 let editor = self.editor.clone();
2451 let interactive_bounds = interactive_bounds.clone();
2452 let mut delta = ScrollDelta::default();
2453
2454 move |event: &ScrollWheelEvent, phase, cx| {
2455 if phase == DispatchPhase::Bubble
2456 && interactive_bounds.visibly_contains(&event.position, cx)
2457 {
2458 delta = delta.coalesce(event.delta);
2459 editor.update(cx, |editor, cx| {
2460 let position = event.position;
2461 let position_map: &PositionMap = &position_map;
2462 let bounds = &interactive_bounds;
2463 if !bounds.visibly_contains(&position, cx) {
2464 return;
2465 }
2466
2467 let line_height = position_map.line_height;
2468 let max_glyph_width = position_map.em_width;
2469 let (delta, axis) = match delta {
2470 gpui::ScrollDelta::Pixels(mut pixels) => {
2471 //Trackpad
2472 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2473 (pixels, axis)
2474 }
2475
2476 gpui::ScrollDelta::Lines(lines) => {
2477 //Not trackpad
2478 let pixels =
2479 point(lines.x * max_glyph_width, lines.y * line_height);
2480 (pixels, None)
2481 }
2482 };
2483
2484 let scroll_position = position_map.snapshot.scroll_position();
2485 let x = f32::from(
2486 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2487 );
2488 let y =
2489 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2490 let scroll_position =
2491 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2492 editor.scroll(scroll_position, axis, cx);
2493 cx.stop_propagation();
2494 });
2495 }
2496 }
2497 });
2498 }
2499
2500 fn paint_mouse_listeners(
2501 &mut self,
2502 bounds: Bounds<Pixels>,
2503 gutter_bounds: Bounds<Pixels>,
2504 text_bounds: Bounds<Pixels>,
2505 layout: &LayoutState,
2506 cx: &mut WindowContext,
2507 ) {
2508 let interactive_bounds = InteractiveBounds {
2509 bounds: bounds.intersect(&cx.content_mask().bounds),
2510 stacking_order: cx.stacking_order().clone(),
2511 };
2512
2513 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2514
2515 cx.on_mouse_event({
2516 let position_map = layout.position_map.clone();
2517 let editor = self.editor.clone();
2518 let stacking_order = cx.stacking_order().clone();
2519 let interactive_bounds = interactive_bounds.clone();
2520
2521 move |event: &MouseDownEvent, phase, cx| {
2522 if phase == DispatchPhase::Bubble
2523 && interactive_bounds.visibly_contains(&event.position, cx)
2524 {
2525 match event.button {
2526 MouseButton::Left => editor.update(cx, |editor, cx| {
2527 Self::mouse_left_down(
2528 editor,
2529 event,
2530 &position_map,
2531 text_bounds,
2532 gutter_bounds,
2533 &stacking_order,
2534 cx,
2535 );
2536 }),
2537 MouseButton::Right => editor.update(cx, |editor, cx| {
2538 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2539 }),
2540 _ => {}
2541 };
2542 }
2543 }
2544 });
2545
2546 cx.on_mouse_event({
2547 let position_map = layout.position_map.clone();
2548 let editor = self.editor.clone();
2549 let stacking_order = cx.stacking_order().clone();
2550 let interactive_bounds = interactive_bounds.clone();
2551
2552 move |event: &MouseUpEvent, phase, cx| {
2553 if phase == DispatchPhase::Bubble
2554 && interactive_bounds.visibly_contains(&event.position, cx)
2555 {
2556 editor.update(cx, |editor, cx| {
2557 Self::mouse_up(
2558 editor,
2559 event,
2560 &position_map,
2561 text_bounds,
2562 &stacking_order,
2563 cx,
2564 )
2565 });
2566 }
2567 }
2568 });
2569 cx.on_mouse_event({
2570 let position_map = layout.position_map.clone();
2571 let editor = self.editor.clone();
2572 let stacking_order = cx.stacking_order().clone();
2573
2574 move |event: &MouseMoveEvent, phase, cx| {
2575 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2576
2577 if phase == DispatchPhase::Bubble {
2578 editor.update(cx, |editor, cx| {
2579 if event.pressed_button == Some(MouseButton::Left) {
2580 Self::mouse_dragged(
2581 editor,
2582 event,
2583 &position_map,
2584 text_bounds,
2585 gutter_bounds,
2586 &stacking_order,
2587 cx,
2588 )
2589 }
2590
2591 if interactive_bounds.visibly_contains(&event.position, cx) {
2592 Self::mouse_moved(
2593 editor,
2594 event,
2595 &position_map,
2596 text_bounds,
2597 gutter_bounds,
2598 &stacking_order,
2599 cx,
2600 )
2601 }
2602 });
2603 }
2604 }
2605 });
2606 }
2607}
2608
2609#[derive(Debug)]
2610pub struct LineWithInvisibles {
2611 pub line: ShapedLine,
2612 invisibles: Vec<Invisible>,
2613}
2614
2615impl LineWithInvisibles {
2616 fn from_chunks<'a>(
2617 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2618 text_style: &TextStyle,
2619 max_line_len: usize,
2620 max_line_count: usize,
2621 line_number_layouts: &[Option<ShapedLine>],
2622 editor_mode: EditorMode,
2623 cx: &WindowContext,
2624 ) -> Vec<Self> {
2625 let mut layouts = Vec::with_capacity(max_line_count);
2626 let mut line = String::new();
2627 let mut invisibles = Vec::new();
2628 let mut styles = Vec::new();
2629 let mut non_whitespace_added = false;
2630 let mut row = 0;
2631 let mut line_exceeded_max_len = false;
2632 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2633
2634 for highlighted_chunk in chunks.chain([HighlightedChunk {
2635 chunk: "\n",
2636 style: None,
2637 is_tab: false,
2638 }]) {
2639 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2640 if ix > 0 {
2641 let shaped_line = cx
2642 .text_system()
2643 .shape_line(line.clone().into(), font_size, &styles)
2644 .unwrap();
2645 layouts.push(Self {
2646 line: shaped_line,
2647 invisibles: invisibles.drain(..).collect(),
2648 });
2649
2650 line.clear();
2651 styles.clear();
2652 row += 1;
2653 line_exceeded_max_len = false;
2654 non_whitespace_added = false;
2655 if row == max_line_count {
2656 return layouts;
2657 }
2658 }
2659
2660 if !line_chunk.is_empty() && !line_exceeded_max_len {
2661 let text_style = if let Some(style) = highlighted_chunk.style {
2662 Cow::Owned(text_style.clone().highlight(style))
2663 } else {
2664 Cow::Borrowed(text_style)
2665 };
2666
2667 if line.len() + line_chunk.len() > max_line_len {
2668 let mut chunk_len = max_line_len - line.len();
2669 while !line_chunk.is_char_boundary(chunk_len) {
2670 chunk_len -= 1;
2671 }
2672 line_chunk = &line_chunk[..chunk_len];
2673 line_exceeded_max_len = true;
2674 }
2675
2676 styles.push(TextRun {
2677 len: line_chunk.len(),
2678 font: text_style.font(),
2679 color: text_style.color,
2680 background_color: text_style.background_color,
2681 underline: text_style.underline,
2682 });
2683
2684 if editor_mode == EditorMode::Full {
2685 // Line wrap pads its contents with fake whitespaces,
2686 // avoid printing them
2687 let inside_wrapped_string = line_number_layouts
2688 .get(row)
2689 .and_then(|layout| layout.as_ref())
2690 .is_none();
2691 if highlighted_chunk.is_tab {
2692 if non_whitespace_added || !inside_wrapped_string {
2693 invisibles.push(Invisible::Tab {
2694 line_start_offset: line.len(),
2695 });
2696 }
2697 } else {
2698 invisibles.extend(
2699 line_chunk
2700 .chars()
2701 .enumerate()
2702 .filter(|(_, line_char)| {
2703 let is_whitespace = line_char.is_whitespace();
2704 non_whitespace_added |= !is_whitespace;
2705 is_whitespace
2706 && (non_whitespace_added || !inside_wrapped_string)
2707 })
2708 .map(|(whitespace_index, _)| Invisible::Whitespace {
2709 line_offset: line.len() + whitespace_index,
2710 }),
2711 )
2712 }
2713 }
2714
2715 line.push_str(line_chunk);
2716 }
2717 }
2718 }
2719
2720 layouts
2721 }
2722
2723 fn draw(
2724 &self,
2725 layout: &LayoutState,
2726 row: u32,
2727 content_origin: gpui::Point<Pixels>,
2728 whitespace_setting: ShowWhitespaceSetting,
2729 selection_ranges: &[Range<DisplayPoint>],
2730 cx: &mut WindowContext,
2731 ) {
2732 let line_height = layout.position_map.line_height;
2733 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2734
2735 self.line
2736 .paint(
2737 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2738 line_height,
2739 cx,
2740 )
2741 .log_err();
2742
2743 self.draw_invisibles(
2744 &selection_ranges,
2745 layout,
2746 content_origin,
2747 line_y,
2748 row,
2749 line_height,
2750 whitespace_setting,
2751 cx,
2752 );
2753 }
2754
2755 fn draw_invisibles(
2756 &self,
2757 selection_ranges: &[Range<DisplayPoint>],
2758 layout: &LayoutState,
2759 content_origin: gpui::Point<Pixels>,
2760 line_y: Pixels,
2761 row: u32,
2762 line_height: Pixels,
2763 whitespace_setting: ShowWhitespaceSetting,
2764 cx: &mut WindowContext,
2765 ) {
2766 let allowed_invisibles_regions = match whitespace_setting {
2767 ShowWhitespaceSetting::None => return,
2768 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2769 ShowWhitespaceSetting::All => None,
2770 };
2771
2772 for invisible in &self.invisibles {
2773 let (&token_offset, invisible_symbol) = match invisible {
2774 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2775 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2776 };
2777
2778 let x_offset = self.line.x_for_index(token_offset);
2779 let invisible_offset =
2780 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2781 let origin = content_origin
2782 + gpui::point(
2783 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2784 line_y,
2785 );
2786
2787 if let Some(allowed_regions) = allowed_invisibles_regions {
2788 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2789 if !allowed_regions
2790 .iter()
2791 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2792 {
2793 continue;
2794 }
2795 }
2796 invisible_symbol.paint(origin, line_height, cx).log_err();
2797 }
2798 }
2799}
2800
2801#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2802enum Invisible {
2803 Tab { line_start_offset: usize },
2804 Whitespace { line_offset: usize },
2805}
2806
2807impl Element for EditorElement {
2808 type State = ();
2809
2810 fn request_layout(
2811 &mut self,
2812 _element_state: Option<Self::State>,
2813 cx: &mut gpui::WindowContext,
2814 ) -> (gpui::LayoutId, Self::State) {
2815 self.editor.update(cx, |editor, cx| {
2816 editor.set_style(self.style.clone(), cx);
2817
2818 let layout_id = match editor.mode {
2819 EditorMode::SingleLine => {
2820 let rem_size = cx.rem_size();
2821 let mut style = Style::default();
2822 style.size.width = relative(1.).into();
2823 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2824 cx.request_layout(&style, None)
2825 }
2826 EditorMode::AutoHeight { max_lines } => {
2827 let editor_handle = cx.view().clone();
2828 let max_line_number_width =
2829 self.max_line_number_width(&editor.snapshot(cx), cx);
2830 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2831 editor_handle
2832 .update(cx, |editor, cx| {
2833 compute_auto_height_layout(
2834 editor,
2835 max_lines,
2836 max_line_number_width,
2837 known_dimensions,
2838 cx,
2839 )
2840 })
2841 .unwrap_or_default()
2842 })
2843 }
2844 EditorMode::Full => {
2845 let mut style = Style::default();
2846 style.size.width = relative(1.).into();
2847 style.size.height = relative(1.).into();
2848 cx.request_layout(&style, None)
2849 }
2850 };
2851
2852 (layout_id, ())
2853 })
2854 }
2855
2856 fn paint(
2857 &mut self,
2858 bounds: Bounds<gpui::Pixels>,
2859 _element_state: &mut Self::State,
2860 cx: &mut gpui::WindowContext,
2861 ) {
2862 let editor = self.editor.clone();
2863
2864 cx.with_text_style(
2865 Some(gpui::TextStyleRefinement {
2866 font_size: Some(self.style.text.font_size),
2867 ..Default::default()
2868 }),
2869 |cx| {
2870 let mut layout = self.compute_layout(bounds, cx);
2871 let gutter_bounds = Bounds {
2872 origin: bounds.origin,
2873 size: layout.gutter_size,
2874 };
2875 let text_bounds = Bounds {
2876 origin: gutter_bounds.upper_right(),
2877 size: layout.text_size,
2878 };
2879
2880 let focus_handle = editor.focus_handle(cx);
2881 let key_context = self.editor.read(cx).key_context(cx);
2882 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2883 self.register_actions(cx);
2884 self.register_key_listeners(cx);
2885
2886 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2887 let input_handler =
2888 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2889 cx.handle_input(&focus_handle, input_handler);
2890
2891 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2892 if layout.gutter_size.width > Pixels::ZERO {
2893 self.paint_gutter(gutter_bounds, &mut layout, cx);
2894 }
2895 self.paint_text(text_bounds, &mut layout, cx);
2896
2897 cx.with_z_index(0, |cx| {
2898 self.paint_mouse_listeners(
2899 bounds,
2900 gutter_bounds,
2901 text_bounds,
2902 &layout,
2903 cx,
2904 );
2905 });
2906 if !layout.blocks.is_empty() {
2907 cx.with_z_index(0, |cx| {
2908 cx.with_element_id(Some("editor_blocks"), |cx| {
2909 self.paint_blocks(bounds, &mut layout, cx);
2910 });
2911 })
2912 }
2913
2914 cx.with_z_index(1, |cx| {
2915 self.paint_overlays(text_bounds, &mut layout, cx);
2916 });
2917
2918 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2919 });
2920 })
2921 },
2922 );
2923 }
2924}
2925
2926impl IntoElement for EditorElement {
2927 type Element = Self;
2928
2929 fn element_id(&self) -> Option<gpui::ElementId> {
2930 self.editor.element_id()
2931 }
2932
2933 fn into_element(self) -> Self::Element {
2934 self
2935 }
2936}
2937
2938type BufferRow = u32;
2939
2940pub struct LayoutState {
2941 position_map: Arc<PositionMap>,
2942 gutter_size: Size<Pixels>,
2943 gutter_padding: Pixels,
2944 gutter_margin: Pixels,
2945 text_size: gpui::Size<Pixels>,
2946 mode: EditorMode,
2947 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2948 visible_anchor_range: Range<Anchor>,
2949 visible_display_row_range: Range<u32>,
2950 active_rows: BTreeMap<u32, bool>,
2951 highlighted_rows: Option<Range<u32>>,
2952 line_numbers: Vec<Option<ShapedLine>>,
2953 display_hunks: Vec<DisplayDiffHunk>,
2954 blocks: Vec<BlockLayout>,
2955 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2956 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2957 scrollbar_row_range: Range<f32>,
2958 show_scrollbars: bool,
2959 is_singleton: bool,
2960 max_row: u32,
2961 context_menu: Option<(DisplayPoint, AnyElement)>,
2962 code_actions_indicator: Option<CodeActionsIndicator>,
2963 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2964 fold_indicators: Vec<Option<IconButton>>,
2965 tab_invisible: ShapedLine,
2966 space_invisible: ShapedLine,
2967}
2968
2969struct CodeActionsIndicator {
2970 row: u32,
2971 button: IconButton,
2972}
2973
2974struct PositionMap {
2975 size: Size<Pixels>,
2976 line_height: Pixels,
2977 scroll_position: gpui::Point<Pixels>,
2978 scroll_max: gpui::Point<f32>,
2979 em_width: Pixels,
2980 em_advance: Pixels,
2981 line_layouts: Vec<LineWithInvisibles>,
2982 snapshot: EditorSnapshot,
2983}
2984
2985#[derive(Debug, Copy, Clone)]
2986pub struct PointForPosition {
2987 pub previous_valid: DisplayPoint,
2988 pub next_valid: DisplayPoint,
2989 pub exact_unclipped: DisplayPoint,
2990 pub column_overshoot_after_line_end: u32,
2991}
2992
2993impl PointForPosition {
2994 #[cfg(test)]
2995 pub fn valid(valid: DisplayPoint) -> Self {
2996 Self {
2997 previous_valid: valid,
2998 next_valid: valid,
2999 exact_unclipped: valid,
3000 column_overshoot_after_line_end: 0,
3001 }
3002 }
3003
3004 pub fn as_valid(&self) -> Option<DisplayPoint> {
3005 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
3006 Some(self.previous_valid)
3007 } else {
3008 None
3009 }
3010 }
3011}
3012
3013impl PositionMap {
3014 fn point_for_position(
3015 &self,
3016 text_bounds: Bounds<Pixels>,
3017 position: gpui::Point<Pixels>,
3018 ) -> PointForPosition {
3019 let scroll_position = self.snapshot.scroll_position();
3020 let position = position - text_bounds.origin;
3021 let y = position.y.max(px(0.)).min(self.size.height);
3022 let x = position.x + (scroll_position.x * self.em_width);
3023 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3024
3025 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3026 .line_layouts
3027 .get(row as usize - scroll_position.y as usize)
3028 .map(|&LineWithInvisibles { ref line, .. }| line)
3029 {
3030 if let Some(ix) = line.index_for_x(x) {
3031 (ix as u32, px(0.))
3032 } else {
3033 (line.len as u32, px(0.).max(x - line.width))
3034 }
3035 } else {
3036 (0, x)
3037 };
3038
3039 let mut exact_unclipped = DisplayPoint::new(row, column);
3040 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3041 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3042
3043 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3044 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3045 PointForPosition {
3046 previous_valid,
3047 next_valid,
3048 exact_unclipped,
3049 column_overshoot_after_line_end,
3050 }
3051 }
3052}
3053
3054struct BlockLayout {
3055 row: u32,
3056 element: AnyElement,
3057 available_space: Size<AvailableSpace>,
3058 style: BlockStyle,
3059}
3060
3061fn layout_line(
3062 row: u32,
3063 snapshot: &EditorSnapshot,
3064 style: &EditorStyle,
3065 cx: &WindowContext,
3066) -> Result<ShapedLine> {
3067 let mut line = snapshot.line(row);
3068
3069 if line.len() > MAX_LINE_LEN {
3070 let mut len = MAX_LINE_LEN;
3071 while !line.is_char_boundary(len) {
3072 len -= 1;
3073 }
3074
3075 line.truncate(len);
3076 }
3077
3078 cx.text_system().shape_line(
3079 line.into(),
3080 style.text.font_size.to_pixels(cx.rem_size()),
3081 &[TextRun {
3082 len: snapshot.line_len(row) as usize,
3083 font: style.text.font(),
3084 color: Hsla::default(),
3085 background_color: None,
3086 underline: None,
3087 }],
3088 )
3089}
3090
3091#[derive(Debug)]
3092pub struct Cursor {
3093 origin: gpui::Point<Pixels>,
3094 block_width: Pixels,
3095 line_height: Pixels,
3096 color: Hsla,
3097 shape: CursorShape,
3098 block_text: Option<ShapedLine>,
3099}
3100
3101impl Cursor {
3102 pub fn new(
3103 origin: gpui::Point<Pixels>,
3104 block_width: Pixels,
3105 line_height: Pixels,
3106 color: Hsla,
3107 shape: CursorShape,
3108 block_text: Option<ShapedLine>,
3109 ) -> Cursor {
3110 Cursor {
3111 origin,
3112 block_width,
3113 line_height,
3114 color,
3115 shape,
3116 block_text,
3117 }
3118 }
3119
3120 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3121 Bounds {
3122 origin: self.origin + origin,
3123 size: size(self.block_width, self.line_height),
3124 }
3125 }
3126
3127 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3128 let bounds = match self.shape {
3129 CursorShape::Bar => Bounds {
3130 origin: self.origin + origin,
3131 size: size(px(2.0), self.line_height),
3132 },
3133 CursorShape::Block | CursorShape::Hollow => Bounds {
3134 origin: self.origin + origin,
3135 size: size(self.block_width, self.line_height),
3136 },
3137 CursorShape::Underscore => Bounds {
3138 origin: self.origin
3139 + origin
3140 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3141 size: size(self.block_width, px(2.0)),
3142 },
3143 };
3144
3145 //Draw background or border quad
3146 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3147 outline(bounds, self.color)
3148 } else {
3149 fill(bounds, self.color)
3150 };
3151
3152 cx.paint_quad(cursor);
3153
3154 if let Some(block_text) = &self.block_text {
3155 block_text
3156 .paint(self.origin + origin, self.line_height, cx)
3157 .log_err();
3158 }
3159 }
3160
3161 pub fn shape(&self) -> CursorShape {
3162 self.shape
3163 }
3164}
3165
3166#[derive(Debug)]
3167pub struct HighlightedRange {
3168 pub start_y: Pixels,
3169 pub line_height: Pixels,
3170 pub lines: Vec<HighlightedRangeLine>,
3171 pub color: Hsla,
3172 pub corner_radius: Pixels,
3173}
3174
3175#[derive(Debug)]
3176pub struct HighlightedRangeLine {
3177 pub start_x: Pixels,
3178 pub end_x: Pixels,
3179}
3180
3181impl HighlightedRange {
3182 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3183 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3184 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3185 self.paint_lines(
3186 self.start_y + self.line_height,
3187 &self.lines[1..],
3188 bounds,
3189 cx,
3190 );
3191 } else {
3192 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3193 }
3194 }
3195
3196 fn paint_lines(
3197 &self,
3198 start_y: Pixels,
3199 lines: &[HighlightedRangeLine],
3200 _bounds: Bounds<Pixels>,
3201 cx: &mut WindowContext,
3202 ) {
3203 if lines.is_empty() {
3204 return;
3205 }
3206
3207 let first_line = lines.first().unwrap();
3208 let last_line = lines.last().unwrap();
3209
3210 let first_top_left = point(first_line.start_x, start_y);
3211 let first_top_right = point(first_line.end_x, start_y);
3212
3213 let curve_height = point(Pixels::ZERO, self.corner_radius);
3214 let curve_width = |start_x: Pixels, end_x: Pixels| {
3215 let max = (end_x - start_x) / 2.;
3216 let width = if max < self.corner_radius {
3217 max
3218 } else {
3219 self.corner_radius
3220 };
3221
3222 point(width, Pixels::ZERO)
3223 };
3224
3225 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3226 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3227 path.curve_to(first_top_right + curve_height, first_top_right);
3228
3229 let mut iter = lines.iter().enumerate().peekable();
3230 while let Some((ix, line)) = iter.next() {
3231 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3232
3233 if let Some((_, next_line)) = iter.peek() {
3234 let next_top_right = point(next_line.end_x, bottom_right.y);
3235
3236 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3237 Ordering::Equal => {
3238 path.line_to(bottom_right);
3239 }
3240 Ordering::Less => {
3241 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3242 path.line_to(bottom_right - curve_height);
3243 if self.corner_radius > Pixels::ZERO {
3244 path.curve_to(bottom_right - curve_width, bottom_right);
3245 }
3246 path.line_to(next_top_right + curve_width);
3247 if self.corner_radius > Pixels::ZERO {
3248 path.curve_to(next_top_right + curve_height, next_top_right);
3249 }
3250 }
3251 Ordering::Greater => {
3252 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3253 path.line_to(bottom_right - curve_height);
3254 if self.corner_radius > Pixels::ZERO {
3255 path.curve_to(bottom_right + curve_width, bottom_right);
3256 }
3257 path.line_to(next_top_right - curve_width);
3258 if self.corner_radius > Pixels::ZERO {
3259 path.curve_to(next_top_right + curve_height, next_top_right);
3260 }
3261 }
3262 }
3263 } else {
3264 let curve_width = curve_width(line.start_x, line.end_x);
3265 path.line_to(bottom_right - curve_height);
3266 if self.corner_radius > Pixels::ZERO {
3267 path.curve_to(bottom_right - curve_width, bottom_right);
3268 }
3269
3270 let bottom_left = point(line.start_x, bottom_right.y);
3271 path.line_to(bottom_left + curve_width);
3272 if self.corner_radius > Pixels::ZERO {
3273 path.curve_to(bottom_left - curve_height, bottom_left);
3274 }
3275 }
3276 }
3277
3278 if first_line.start_x > last_line.start_x {
3279 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3280 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3281 path.line_to(second_top_left + curve_height);
3282 if self.corner_radius > Pixels::ZERO {
3283 path.curve_to(second_top_left + curve_width, second_top_left);
3284 }
3285 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3286 path.line_to(first_bottom_left - curve_width);
3287 if self.corner_radius > Pixels::ZERO {
3288 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3289 }
3290 }
3291
3292 path.line_to(first_top_left + curve_height);
3293 if self.corner_radius > Pixels::ZERO {
3294 path.curve_to(first_top_left + top_curve_width, first_top_left);
3295 }
3296 path.line_to(first_top_right - top_curve_width);
3297
3298 cx.paint_path(path, self.color);
3299 }
3300}
3301
3302pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3303 (delta.pow(1.5) / 100.0).into()
3304}
3305
3306fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3307 (delta.pow(1.2) / 300.0).into()
3308}
3309
3310#[cfg(test)]
3311mod tests {
3312 use super::*;
3313 use crate::{
3314 display_map::{BlockDisposition, BlockProperties},
3315 editor_tests::{init_test, update_test_language_settings},
3316 Editor, MultiBuffer,
3317 };
3318 use gpui::TestAppContext;
3319 use language::language_settings;
3320 use log::info;
3321 use std::{num::NonZeroU32, sync::Arc};
3322 use util::test::sample_text;
3323
3324 #[gpui::test]
3325 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3326 init_test(cx, |_| {});
3327 let window = cx.add_window(|cx| {
3328 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3329 Editor::new(EditorMode::Full, buffer, None, cx)
3330 });
3331
3332 let editor = window.root(cx).unwrap();
3333 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3334 let element = EditorElement::new(&editor, style);
3335
3336 let layouts = window
3337 .update(cx, |editor, cx| {
3338 let snapshot = editor.snapshot(cx);
3339 element
3340 .shape_line_numbers(
3341 0..6,
3342 &Default::default(),
3343 DisplayPoint::new(0, 0),
3344 false,
3345 &snapshot,
3346 cx,
3347 )
3348 .0
3349 })
3350 .unwrap();
3351 assert_eq!(layouts.len(), 6);
3352
3353 let relative_rows = window
3354 .update(cx, |editor, cx| {
3355 let snapshot = editor.snapshot(cx);
3356 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3357 })
3358 .unwrap();
3359 assert_eq!(relative_rows[&0], 3);
3360 assert_eq!(relative_rows[&1], 2);
3361 assert_eq!(relative_rows[&2], 1);
3362 // current line has no relative number
3363 assert_eq!(relative_rows[&4], 1);
3364 assert_eq!(relative_rows[&5], 2);
3365
3366 // works if cursor is before screen
3367 let relative_rows = window
3368 .update(cx, |editor, cx| {
3369 let snapshot = editor.snapshot(cx);
3370
3371 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3372 })
3373 .unwrap();
3374 assert_eq!(relative_rows.len(), 3);
3375 assert_eq!(relative_rows[&3], 2);
3376 assert_eq!(relative_rows[&4], 3);
3377 assert_eq!(relative_rows[&5], 4);
3378
3379 // works if cursor is after screen
3380 let relative_rows = window
3381 .update(cx, |editor, cx| {
3382 let snapshot = editor.snapshot(cx);
3383
3384 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3385 })
3386 .unwrap();
3387 assert_eq!(relative_rows.len(), 3);
3388 assert_eq!(relative_rows[&0], 5);
3389 assert_eq!(relative_rows[&1], 4);
3390 assert_eq!(relative_rows[&2], 3);
3391 }
3392
3393 #[gpui::test]
3394 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3395 init_test(cx, |_| {});
3396
3397 let window = cx.add_window(|cx| {
3398 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3399 Editor::new(EditorMode::Full, buffer, None, cx)
3400 });
3401 let editor = window.root(cx).unwrap();
3402 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3403 let mut element = EditorElement::new(&editor, style);
3404
3405 window
3406 .update(cx, |editor, cx| {
3407 editor.cursor_shape = CursorShape::Block;
3408 editor.change_selections(None, cx, |s| {
3409 s.select_ranges([
3410 Point::new(0, 0)..Point::new(1, 0),
3411 Point::new(3, 2)..Point::new(3, 3),
3412 Point::new(5, 6)..Point::new(6, 0),
3413 ]);
3414 });
3415 })
3416 .unwrap();
3417 let state = cx
3418 .update_window(window.into(), |_, cx| {
3419 element.compute_layout(
3420 Bounds {
3421 origin: point(px(500.), px(500.)),
3422 size: size(px(500.), px(500.)),
3423 },
3424 cx,
3425 )
3426 })
3427 .unwrap();
3428
3429 assert_eq!(state.selections.len(), 1);
3430 let local_selections = &state.selections[0].1;
3431 assert_eq!(local_selections.len(), 3);
3432 // moves cursor back one line
3433 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3434 assert_eq!(
3435 local_selections[0].range,
3436 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3437 );
3438
3439 // moves cursor back one column
3440 assert_eq!(
3441 local_selections[1].range,
3442 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3443 );
3444 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3445
3446 // leaves cursor on the max point
3447 assert_eq!(
3448 local_selections[2].range,
3449 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3450 );
3451 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3452
3453 // active lines does not include 1 (even though the range of the selection does)
3454 assert_eq!(
3455 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3456 vec![0, 3, 5, 6]
3457 );
3458
3459 // multi-buffer support
3460 // in DisplayPoint co-ordinates, this is what we're dealing with:
3461 // 0: [[file
3462 // 1: header]]
3463 // 2: aaaaaa
3464 // 3: bbbbbb
3465 // 4: cccccc
3466 // 5:
3467 // 6: ...
3468 // 7: ffffff
3469 // 8: gggggg
3470 // 9: hhhhhh
3471 // 10:
3472 // 11: [[file
3473 // 12: header]]
3474 // 13: bbbbbb
3475 // 14: cccccc
3476 // 15: dddddd
3477 let window = cx.add_window(|cx| {
3478 let buffer = MultiBuffer::build_multi(
3479 [
3480 (
3481 &(sample_text(8, 6, 'a') + "\n"),
3482 vec![
3483 Point::new(0, 0)..Point::new(3, 0),
3484 Point::new(4, 0)..Point::new(7, 0),
3485 ],
3486 ),
3487 (
3488 &(sample_text(8, 6, 'a') + "\n"),
3489 vec![Point::new(1, 0)..Point::new(3, 0)],
3490 ),
3491 ],
3492 cx,
3493 );
3494 Editor::new(EditorMode::Full, buffer, None, cx)
3495 });
3496 let editor = window.root(cx).unwrap();
3497 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3498 let mut element = EditorElement::new(&editor, style);
3499 let _state = window.update(cx, |editor, cx| {
3500 editor.cursor_shape = CursorShape::Block;
3501 editor.change_selections(None, cx, |s| {
3502 s.select_display_ranges([
3503 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3504 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3505 ]);
3506 });
3507 });
3508
3509 let state = cx
3510 .update_window(window.into(), |_, cx| {
3511 element.compute_layout(
3512 Bounds {
3513 origin: point(px(500.), px(500.)),
3514 size: size(px(500.), px(500.)),
3515 },
3516 cx,
3517 )
3518 })
3519 .unwrap();
3520 assert_eq!(state.selections.len(), 1);
3521 let local_selections = &state.selections[0].1;
3522 assert_eq!(local_selections.len(), 2);
3523
3524 // moves cursor on excerpt boundary back a line
3525 // and doesn't allow selection to bleed through
3526 assert_eq!(
3527 local_selections[0].range,
3528 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3529 );
3530 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3531 // moves cursor on buffer boundary back two lines
3532 // and doesn't allow selection to bleed through
3533 assert_eq!(
3534 local_selections[1].range,
3535 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3536 );
3537 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3538 }
3539
3540 #[gpui::test]
3541 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3542 init_test(cx, |_| {});
3543
3544 let window = cx.add_window(|cx| {
3545 let buffer = MultiBuffer::build_simple("", cx);
3546 Editor::new(EditorMode::Full, buffer, None, cx)
3547 });
3548 let editor = window.root(cx).unwrap();
3549 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3550 window
3551 .update(cx, |editor, cx| {
3552 editor.set_placeholder_text("hello", cx);
3553 editor.insert_blocks(
3554 [BlockProperties {
3555 style: BlockStyle::Fixed,
3556 disposition: BlockDisposition::Above,
3557 height: 3,
3558 position: Anchor::min(),
3559 render: Arc::new(|_| div().into_any()),
3560 }],
3561 None,
3562 cx,
3563 );
3564
3565 // Blur the editor so that it displays placeholder text.
3566 cx.blur();
3567 })
3568 .unwrap();
3569
3570 let mut element = EditorElement::new(&editor, style);
3571 let state = cx
3572 .update_window(window.into(), |_, cx| {
3573 element.compute_layout(
3574 Bounds {
3575 origin: point(px(500.), px(500.)),
3576 size: size(px(500.), px(500.)),
3577 },
3578 cx,
3579 )
3580 })
3581 .unwrap();
3582 let size = state.position_map.size;
3583
3584 assert_eq!(state.position_map.line_layouts.len(), 4);
3585 assert_eq!(
3586 state
3587 .line_numbers
3588 .iter()
3589 .map(Option::is_some)
3590 .collect::<Vec<_>>(),
3591 &[false, false, false, true]
3592 );
3593
3594 // Don't panic.
3595 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3596 cx.update_window(window.into(), |_, cx| {
3597 element.paint(bounds, &mut (), cx);
3598 })
3599 .unwrap()
3600 }
3601
3602 #[gpui::test]
3603 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3604 const TAB_SIZE: u32 = 4;
3605
3606 let input_text = "\t \t|\t| a b";
3607 let expected_invisibles = vec![
3608 Invisible::Tab {
3609 line_start_offset: 0,
3610 },
3611 Invisible::Whitespace {
3612 line_offset: TAB_SIZE as usize,
3613 },
3614 Invisible::Tab {
3615 line_start_offset: TAB_SIZE as usize + 1,
3616 },
3617 Invisible::Tab {
3618 line_start_offset: TAB_SIZE as usize * 2 + 1,
3619 },
3620 Invisible::Whitespace {
3621 line_offset: TAB_SIZE as usize * 3 + 1,
3622 },
3623 Invisible::Whitespace {
3624 line_offset: TAB_SIZE as usize * 3 + 3,
3625 },
3626 ];
3627 assert_eq!(
3628 expected_invisibles.len(),
3629 input_text
3630 .chars()
3631 .filter(|initial_char| initial_char.is_whitespace())
3632 .count(),
3633 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3634 );
3635
3636 init_test(cx, |s| {
3637 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3638 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3639 });
3640
3641 let actual_invisibles =
3642 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3643
3644 assert_eq!(expected_invisibles, actual_invisibles);
3645 }
3646
3647 #[gpui::test]
3648 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3649 init_test(cx, |s| {
3650 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3651 s.defaults.tab_size = NonZeroU32::new(4);
3652 });
3653
3654 for editor_mode_without_invisibles in [
3655 EditorMode::SingleLine,
3656 EditorMode::AutoHeight { max_lines: 100 },
3657 ] {
3658 let invisibles = collect_invisibles_from_new_editor(
3659 cx,
3660 editor_mode_without_invisibles,
3661 "\t\t\t| | a b",
3662 px(500.0),
3663 );
3664 assert!(invisibles.is_empty(),
3665 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3666 }
3667 }
3668
3669 #[gpui::test]
3670 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3671 let tab_size = 4;
3672 let input_text = "a\tbcd ".repeat(9);
3673 let repeated_invisibles = [
3674 Invisible::Tab {
3675 line_start_offset: 1,
3676 },
3677 Invisible::Whitespace {
3678 line_offset: tab_size as usize + 3,
3679 },
3680 Invisible::Whitespace {
3681 line_offset: tab_size as usize + 4,
3682 },
3683 Invisible::Whitespace {
3684 line_offset: tab_size as usize + 5,
3685 },
3686 ];
3687 let expected_invisibles = std::iter::once(repeated_invisibles)
3688 .cycle()
3689 .take(9)
3690 .flatten()
3691 .collect::<Vec<_>>();
3692 assert_eq!(
3693 expected_invisibles.len(),
3694 input_text
3695 .chars()
3696 .filter(|initial_char| initial_char.is_whitespace())
3697 .count(),
3698 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3699 );
3700 info!("Expected invisibles: {expected_invisibles:?}");
3701
3702 init_test(cx, |_| {});
3703
3704 // Put the same string with repeating whitespace pattern into editors of various size,
3705 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3706 let resize_step = 10.0;
3707 let mut editor_width = 200.0;
3708 while editor_width <= 1000.0 {
3709 update_test_language_settings(cx, |s| {
3710 s.defaults.tab_size = NonZeroU32::new(tab_size);
3711 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3712 s.defaults.preferred_line_length = Some(editor_width as u32);
3713 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3714 });
3715
3716 let actual_invisibles = collect_invisibles_from_new_editor(
3717 cx,
3718 EditorMode::Full,
3719 &input_text,
3720 px(editor_width),
3721 );
3722
3723 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3724 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3725 let mut i = 0;
3726 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3727 i = actual_index;
3728 match expected_invisibles.get(i) {
3729 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3730 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3731 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3732 _ => {
3733 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3734 }
3735 },
3736 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3737 }
3738 }
3739 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3740 assert!(
3741 missing_expected_invisibles.is_empty(),
3742 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3743 );
3744
3745 editor_width += resize_step;
3746 }
3747 }
3748
3749 fn collect_invisibles_from_new_editor(
3750 cx: &mut TestAppContext,
3751 editor_mode: EditorMode,
3752 input_text: &str,
3753 editor_width: Pixels,
3754 ) -> Vec<Invisible> {
3755 info!(
3756 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3757 editor_width.0
3758 );
3759 let window = cx.add_window(|cx| {
3760 let buffer = MultiBuffer::build_simple(&input_text, cx);
3761 Editor::new(editor_mode, buffer, None, cx)
3762 });
3763 let editor = window.root(cx).unwrap();
3764 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3765 let mut element = EditorElement::new(&editor, style);
3766 window
3767 .update(cx, |editor, cx| {
3768 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3769 editor.set_wrap_width(Some(editor_width), cx);
3770 })
3771 .unwrap();
3772 let layout_state = cx
3773 .update_window(window.into(), |_, cx| {
3774 element.compute_layout(
3775 Bounds {
3776 origin: point(px(500.), px(500.)),
3777 size: size(px(500.), px(500.)),
3778 },
3779 cx,
3780 )
3781 })
3782 .unwrap();
3783
3784 layout_state
3785 .position_map
3786 .line_layouts
3787 .iter()
3788 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3789 .flatten()
3790 .cloned()
3791 .collect()
3792 }
3793}
3794
3795pub fn register_action<T: Action>(
3796 view: &View<Editor>,
3797 cx: &mut WindowContext,
3798 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3799) {
3800 let view = view.clone();
3801 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3802 let action = action.downcast_ref().unwrap();
3803 if phase == DispatchPhase::Bubble {
3804 view.update(cx, |editor, cx| {
3805 listener(editor, action, cx);
3806 })
3807 }
3808 })
3809}
3810
3811fn compute_auto_height_layout(
3812 editor: &mut Editor,
3813 max_lines: usize,
3814 max_line_number_width: Pixels,
3815 known_dimensions: Size<Option<Pixels>>,
3816 cx: &mut ViewContext<Editor>,
3817) -> Option<Size<Pixels>> {
3818 let width = known_dimensions.width?;
3819 if let Some(height) = known_dimensions.height {
3820 return Some(size(width, height));
3821 }
3822
3823 let style = editor.style.as_ref().unwrap();
3824 let font_id = cx.text_system().resolve_font(&style.text.font());
3825 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3826 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3827 let em_width = cx
3828 .text_system()
3829 .typographic_bounds(font_id, font_size, 'm')
3830 .unwrap()
3831 .size
3832 .width;
3833
3834 let mut snapshot = editor.snapshot(cx);
3835 let gutter_width;
3836 let gutter_margin;
3837 if snapshot.show_gutter {
3838 let descent = cx.text_system().descent(font_id, font_size);
3839 let gutter_padding_factor = 3.5;
3840 let gutter_padding = (em_width * gutter_padding_factor).round();
3841 gutter_width = max_line_number_width + gutter_padding * 2.0;
3842 gutter_margin = -descent;
3843 } else {
3844 gutter_width = Pixels::ZERO;
3845 gutter_margin = Pixels::ZERO;
3846 };
3847
3848 editor.gutter_width = gutter_width;
3849 let text_width = width - gutter_width;
3850 let overscroll = size(em_width, px(0.));
3851
3852 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3853 if editor.set_wrap_width(Some(editor_width), cx) {
3854 snapshot = editor.snapshot(cx);
3855 }
3856
3857 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3858 let height = scroll_height
3859 .max(line_height)
3860 .min(line_height * max_lines as f32);
3861
3862 Some(size(width, height))
3863}