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, Entity, Hsla,
30 InteractiveBounds, InteractiveElement, IntoElement, ModifiersChangedEvent, MouseButton,
31 MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, ScrollDelta,
32 ScrollWheelEvent, ShapedLine, SharedString, Size, StackingOrder, StatefulInteractiveElement,
33 Style, Styled, TextRun, TextStyle, View, ViewContext, WindowContext,
34};
35use itertools::Itertools;
36use language::language_settings::ShowWhitespaceSetting;
37use multi_buffer::Anchor;
38use project::{
39 project_settings::{GitGutterSetting, ProjectSettings},
40 ProjectPath,
41};
42use settings::Settings;
43use smallvec::SmallVec;
44use std::{
45 any::TypeId,
46 borrow::Cow,
47 cmp::{self, Ordering},
48 fmt::Write,
49 iter,
50 ops::Range,
51 sync::Arc,
52};
53use sum_tree::Bias;
54use theme::{ActiveTheme, PlayerColor};
55use ui::prelude::*;
56use ui::{h_flex, ButtonLike, ButtonStyle, IconButton, Tooltip};
57use util::ResultExt;
58use workspace::item::Item;
59
60struct SelectionLayout {
61 head: DisplayPoint,
62 cursor_shape: CursorShape,
63 is_newest: bool,
64 is_local: bool,
65 range: Range<DisplayPoint>,
66 active_rows: Range<u32>,
67}
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 cx.default_prevented() {
392 return;
393 } else if gutter_bounds.contains(&event.position) {
394 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
395 } else if !text_bounds.contains(&event.position) {
396 return;
397 }
398 if !cx.was_top_layer(&event.position, stacking_order) {
399 return;
400 }
401
402 let point_for_position = position_map.point_for_position(text_bounds, event.position);
403 let position = point_for_position.previous_valid;
404 if modifiers.shift && modifiers.alt {
405 editor.select(
406 SelectPhase::BeginColumnar {
407 position,
408 goal_column: point_for_position.exact_unclipped.column(),
409 },
410 cx,
411 );
412 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
413 editor.select(
414 SelectPhase::Extend {
415 position,
416 click_count,
417 },
418 cx,
419 );
420 } else {
421 editor.select(
422 SelectPhase::Begin {
423 position,
424 add: modifiers.alt,
425 click_count,
426 },
427 cx,
428 );
429 }
430
431 cx.stop_propagation();
432 }
433
434 fn mouse_right_down(
435 editor: &mut Editor,
436 event: &MouseDownEvent,
437 position_map: &PositionMap,
438 text_bounds: Bounds<Pixels>,
439 cx: &mut ViewContext<Editor>,
440 ) {
441 if !text_bounds.contains(&event.position) {
442 return;
443 }
444 let point_for_position = position_map.point_for_position(text_bounds, event.position);
445 mouse_context_menu::deploy_context_menu(
446 editor,
447 event.position,
448 point_for_position.previous_valid,
449 cx,
450 );
451 cx.stop_propagation();
452 }
453
454 fn mouse_up(
455 editor: &mut Editor,
456 event: &MouseUpEvent,
457 position_map: &PositionMap,
458 text_bounds: Bounds<Pixels>,
459 stacking_order: &StackingOrder,
460 cx: &mut ViewContext<Editor>,
461 ) {
462 let end_selection = editor.has_pending_selection();
463 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
464
465 if end_selection {
466 editor.select(SelectPhase::End, cx);
467 }
468
469 if !pending_nonempty_selections
470 && event.modifiers.command
471 && text_bounds.contains(&event.position)
472 && cx.was_top_layer(&event.position, stacking_order)
473 {
474 let point = position_map.point_for_position(text_bounds, event.position);
475 let could_be_inlay = point.as_valid().is_none();
476 let split = event.modifiers.alt;
477 if event.modifiers.shift || could_be_inlay {
478 go_to_fetched_type_definition(editor, point, split, cx);
479 } else {
480 go_to_fetched_definition(editor, point, split, cx);
481 }
482
483 cx.stop_propagation();
484 } else if end_selection {
485 cx.stop_propagation();
486 }
487 }
488
489 fn mouse_dragged(
490 editor: &mut Editor,
491 event: &MouseMoveEvent,
492 position_map: &PositionMap,
493 text_bounds: Bounds<Pixels>,
494 _gutter_bounds: Bounds<Pixels>,
495 _stacking_order: &StackingOrder,
496 cx: &mut ViewContext<Editor>,
497 ) {
498 if !editor.has_pending_selection() {
499 return;
500 }
501
502 let point_for_position = position_map.point_for_position(text_bounds, event.position);
503 let mut scroll_delta = gpui::Point::<f32>::default();
504 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
505 let top = text_bounds.origin.y + vertical_margin;
506 let bottom = text_bounds.lower_left().y - vertical_margin;
507 if event.position.y < top {
508 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
509 }
510 if event.position.y > bottom {
511 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
512 }
513
514 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
515 let left = text_bounds.origin.x + horizontal_margin;
516 let right = text_bounds.upper_right().x - horizontal_margin;
517 if event.position.x < left {
518 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
519 }
520 if event.position.x > right {
521 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
522 }
523
524 editor.select(
525 SelectPhase::Update {
526 position: point_for_position.previous_valid,
527 goal_column: point_for_position.exact_unclipped.column(),
528 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
529 .clamp(&gpui::Point::default(), &position_map.scroll_max),
530 },
531 cx,
532 );
533 }
534
535 fn mouse_moved(
536 editor: &mut Editor,
537 event: &MouseMoveEvent,
538 position_map: &PositionMap,
539 text_bounds: Bounds<Pixels>,
540 gutter_bounds: Bounds<Pixels>,
541 stacking_order: &StackingOrder,
542 cx: &mut ViewContext<Editor>,
543 ) {
544 let modifiers = event.modifiers;
545 let text_hovered = text_bounds.contains(&event.position);
546 let gutter_hovered = gutter_bounds.contains(&event.position);
547 let was_top = cx.was_top_layer(&event.position, stacking_order);
548
549 editor.set_gutter_hovered(gutter_hovered, cx);
550
551 // Don't trigger hover popover if mouse is hovering over context menu
552 if text_hovered && was_top {
553 let point_for_position = position_map.point_for_position(text_bounds, event.position);
554
555 match point_for_position.as_valid() {
556 Some(point) => {
557 update_go_to_definition_link(
558 editor,
559 Some(GoToDefinitionTrigger::Text(point)),
560 modifiers.command,
561 modifiers.shift,
562 cx,
563 );
564 hover_at(editor, Some(point), cx);
565 }
566 None => {
567 update_inlay_link_and_hover_points(
568 &position_map.snapshot,
569 point_for_position,
570 editor,
571 modifiers.command,
572 modifiers.shift,
573 cx,
574 );
575 }
576 }
577 } else {
578 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
579 hover_at(editor, None, cx);
580 if gutter_hovered && was_top {
581 cx.stop_propagation();
582 }
583 }
584 }
585
586 fn paint_background(
587 &self,
588 gutter_bounds: Bounds<Pixels>,
589 text_bounds: Bounds<Pixels>,
590 layout: &LayoutState,
591 cx: &mut WindowContext,
592 ) {
593 let bounds = gutter_bounds.union(&text_bounds);
594 let scroll_top =
595 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
596 let gutter_bg = cx.theme().colors().editor_gutter_background;
597 cx.paint_quad(fill(gutter_bounds, gutter_bg));
598 cx.paint_quad(fill(text_bounds, self.style.background));
599
600 if let EditorMode::Full = layout.mode {
601 let mut active_rows = layout.active_rows.iter().peekable();
602 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
603 let mut end_row = *start_row;
604 while active_rows.peek().map_or(false, |r| {
605 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
606 }) {
607 active_rows.next().unwrap();
608 end_row += 1;
609 }
610
611 if !contains_non_empty_selection {
612 let origin = point(
613 bounds.origin.x,
614 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
615 - scroll_top,
616 );
617 let size = size(
618 bounds.size.width,
619 layout.position_map.line_height * (end_row - start_row + 1) as f32,
620 );
621 let active_line_bg = cx.theme().colors().editor_active_line_background;
622 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
623 }
624 }
625
626 if let Some(highlighted_rows) = &layout.highlighted_rows {
627 let origin = point(
628 bounds.origin.x,
629 bounds.origin.y
630 + (layout.position_map.line_height * highlighted_rows.start as f32)
631 - scroll_top,
632 );
633 let size = size(
634 bounds.size.width,
635 layout.position_map.line_height * highlighted_rows.len() as f32,
636 );
637 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
638 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
639 }
640
641 let scroll_left =
642 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
643
644 for (wrap_position, active) in layout.wrap_guides.iter() {
645 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
646 - scroll_left;
647
648 if x < text_bounds.origin.x
649 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
650 {
651 continue;
652 }
653
654 let color = if *active {
655 cx.theme().colors().editor_active_wrap_guide
656 } else {
657 cx.theme().colors().editor_wrap_guide
658 };
659 cx.paint_quad(fill(
660 Bounds {
661 origin: point(x, text_bounds.origin.y),
662 size: size(px(1.), text_bounds.size.height),
663 },
664 color,
665 ));
666 }
667 }
668 }
669
670 fn paint_gutter(
671 &mut self,
672 bounds: Bounds<Pixels>,
673 layout: &mut LayoutState,
674 cx: &mut WindowContext,
675 ) {
676 let line_height = layout.position_map.line_height;
677
678 let scroll_position = layout.position_map.snapshot.scroll_position();
679 let scroll_top = scroll_position.y * line_height;
680
681 let show_gutter = matches!(
682 ProjectSettings::get_global(cx).git.git_gutter,
683 Some(GitGutterSetting::TrackedFiles)
684 );
685
686 if show_gutter {
687 Self::paint_diff_hunks(bounds, layout, cx);
688 }
689
690 for (ix, line) in layout.line_numbers.iter().enumerate() {
691 if let Some(line) = line {
692 let line_origin = bounds.origin
693 + point(
694 bounds.size.width - line.width - layout.gutter_padding,
695 ix as f32 * line_height - (scroll_top % line_height),
696 );
697
698 line.paint(line_origin, line_height, cx).log_err();
699 }
700 }
701
702 cx.with_z_index(1, |cx| {
703 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
704 if let Some(fold_indicator) = fold_indicator {
705 let mut fold_indicator = fold_indicator.into_any_element();
706 let available_space = size(
707 AvailableSpace::MinContent,
708 AvailableSpace::Definite(line_height * 0.55),
709 );
710 let fold_indicator_size = fold_indicator.measure(available_space, cx);
711
712 let position = point(
713 bounds.size.width - layout.gutter_padding,
714 ix as f32 * line_height - (scroll_top % line_height),
715 );
716 let centering_offset = point(
717 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
718 / 2.,
719 (line_height - fold_indicator_size.height) / 2.,
720 );
721 let origin = bounds.origin + position + centering_offset;
722 fold_indicator.draw(origin, available_space, cx);
723 }
724 }
725
726 if let Some(indicator) = layout.code_actions_indicator.take() {
727 let mut button = indicator.button.into_any_element();
728 let available_space = size(
729 AvailableSpace::MinContent,
730 AvailableSpace::Definite(line_height),
731 );
732 let indicator_size = button.measure(available_space, cx);
733
734 let mut x = Pixels::ZERO;
735 let mut y = indicator.row as f32 * line_height - scroll_top;
736 // Center indicator.
737 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
738 y += (line_height - indicator_size.height) / 2.;
739
740 button.draw(bounds.origin + point(x, y), available_space, cx);
741 }
742 });
743 }
744
745 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
746 let line_height = layout.position_map.line_height;
747
748 let scroll_position = layout.position_map.snapshot.scroll_position();
749 let scroll_top = scroll_position.y * line_height;
750
751 for hunk in &layout.display_hunks {
752 let (display_row_range, status) = match hunk {
753 //TODO: This rendering is entirely a horrible hack
754 &DisplayDiffHunk::Folded { display_row: row } => {
755 let start_y = row as f32 * line_height - scroll_top;
756 let end_y = start_y + line_height;
757
758 let width = 0.275 * line_height;
759 let highlight_origin = bounds.origin + point(-width, start_y);
760 let highlight_size = size(width * 2., end_y - start_y);
761 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
762 cx.paint_quad(quad(
763 highlight_bounds,
764 Corners::all(1. * line_height),
765 cx.theme().status().modified,
766 Edges::default(),
767 transparent_black(),
768 ));
769
770 continue;
771 }
772
773 DisplayDiffHunk::Unfolded {
774 display_row_range,
775 status,
776 } => (display_row_range, status),
777 };
778
779 let color = match status {
780 DiffHunkStatus::Added => cx.theme().status().created,
781 DiffHunkStatus::Modified => cx.theme().status().modified,
782
783 //TODO: This rendering is entirely a horrible hack
784 DiffHunkStatus::Removed => {
785 let row = display_row_range.start;
786
787 let offset = line_height / 2.;
788 let start_y = row as f32 * line_height - offset - scroll_top;
789 let end_y = start_y + line_height;
790
791 let width = 0.275 * line_height;
792 let highlight_origin = bounds.origin + point(-width, start_y);
793 let highlight_size = size(width * 2., end_y - start_y);
794 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
795 cx.paint_quad(quad(
796 highlight_bounds,
797 Corners::all(1. * line_height),
798 cx.theme().status().deleted,
799 Edges::default(),
800 transparent_black(),
801 ));
802
803 continue;
804 }
805 };
806
807 let start_row = display_row_range.start;
808 let end_row = display_row_range.end;
809 // If we're in a multibuffer, row range span might include an
810 // excerpt header, so if we were to draw the marker straight away,
811 // the hunk might include the rows of that header.
812 // Making the range inclusive doesn't quite cut it, as we rely on the exclusivity for the soft wrap.
813 // Instead, we simply check whether the range we're dealing with includes
814 // any excerpt headers and if so, we stop painting the diff hunk on the first row of that header.
815 let end_row_in_current_excerpt = layout
816 .position_map
817 .snapshot
818 .blocks_in_range(start_row..end_row)
819 .find_map(|(start_row, block)| {
820 if matches!(block, TransformBlock::ExcerptHeader { .. }) {
821 Some(start_row)
822 } else {
823 None
824 }
825 })
826 .unwrap_or(end_row);
827
828 let start_y = start_row as f32 * line_height - scroll_top;
829 let end_y = end_row_in_current_excerpt as f32 * line_height - scroll_top;
830
831 let width = 0.275 * line_height;
832 let highlight_origin = bounds.origin + point(-width, start_y);
833 let highlight_size = size(width * 2., end_y - start_y);
834 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
835 cx.paint_quad(quad(
836 highlight_bounds,
837 Corners::all(0.05 * line_height),
838 color,
839 Edges::default(),
840 transparent_black(),
841 ));
842 }
843 }
844
845 fn paint_text(
846 &mut self,
847 text_bounds: Bounds<Pixels>,
848 layout: &mut LayoutState,
849 cx: &mut WindowContext,
850 ) {
851 let start_row = layout.visible_display_row_range.start;
852 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
853 let line_end_overshoot = 0.15 * layout.position_map.line_height;
854 let whitespace_setting = self
855 .editor
856 .read(cx)
857 .buffer
858 .read(cx)
859 .settings_at(0, cx)
860 .show_whitespaces;
861
862 cx.with_content_mask(
863 Some(ContentMask {
864 bounds: text_bounds,
865 }),
866 |cx| {
867 let interactive_text_bounds = InteractiveBounds {
868 bounds: text_bounds,
869 stacking_order: cx.stacking_order().clone(),
870 };
871 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
872 if self
873 .editor
874 .read(cx)
875 .link_go_to_definition_state
876 .definitions
877 .is_empty()
878 {
879 cx.set_cursor_style(CursorStyle::IBeam);
880 } else {
881 cx.set_cursor_style(CursorStyle::PointingHand);
882 }
883 }
884
885 let fold_corner_radius = 0.15 * layout.position_map.line_height;
886 cx.with_element_id(Some("folds"), |cx| {
887 let snapshot = &layout.position_map.snapshot;
888
889 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
890 let fold_range = fold.range.clone();
891 let display_range = fold.range.start.to_display_point(&snapshot)
892 ..fold.range.end.to_display_point(&snapshot);
893 debug_assert_eq!(display_range.start.row(), display_range.end.row());
894 let row = display_range.start.row();
895 debug_assert!(row < layout.visible_display_row_range.end);
896 let Some(line_layout) = &layout
897 .position_map
898 .line_layouts
899 .get((row - layout.visible_display_row_range.start) as usize)
900 .map(|l| &l.line)
901 else {
902 continue;
903 };
904
905 let start_x = content_origin.x
906 + line_layout.x_for_index(display_range.start.column() as usize)
907 - layout.position_map.scroll_position.x;
908 let start_y = content_origin.y
909 + row as f32 * layout.position_map.line_height
910 - layout.position_map.scroll_position.y;
911 let end_x = content_origin.x
912 + line_layout.x_for_index(display_range.end.column() as usize)
913 - layout.position_map.scroll_position.x;
914
915 let fold_bounds = Bounds {
916 origin: point(start_x, start_y),
917 size: size(end_x - start_x, layout.position_map.line_height),
918 };
919
920 let fold_background = cx.with_z_index(1, |cx| {
921 div()
922 .id(fold.id)
923 .size_full()
924 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
925 .on_click(cx.listener_for(
926 &self.editor,
927 move |editor: &mut Editor, _, cx| {
928 editor.unfold_ranges(
929 [fold_range.start..fold_range.end],
930 true,
931 false,
932 cx,
933 );
934 cx.stop_propagation();
935 },
936 ))
937 .draw_and_update_state(
938 fold_bounds.origin,
939 fold_bounds.size,
940 cx,
941 |fold_element_state, cx| {
942 if fold_element_state.is_active() {
943 cx.theme().colors().ghost_element_active
944 } else if fold_bounds.contains(&cx.mouse_position()) {
945 cx.theme().colors().ghost_element_hover
946 } else {
947 cx.theme().colors().ghost_element_background
948 }
949 },
950 )
951 });
952
953 self.paint_highlighted_range(
954 display_range.clone(),
955 fold_background,
956 fold_corner_radius,
957 fold_corner_radius * 2.,
958 layout,
959 content_origin,
960 text_bounds,
961 cx,
962 );
963 }
964 });
965
966 for (range, color) in &layout.highlighted_ranges {
967 self.paint_highlighted_range(
968 range.clone(),
969 *color,
970 Pixels::ZERO,
971 line_end_overshoot,
972 layout,
973 content_origin,
974 text_bounds,
975 cx,
976 );
977 }
978
979 let mut cursors = SmallVec::<[Cursor; 32]>::new();
980 let corner_radius = 0.15 * layout.position_map.line_height;
981 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
982
983 for (selection_style, selections) in &layout.selections {
984 for selection in selections {
985 self.paint_highlighted_range(
986 selection.range.clone(),
987 selection_style.selection,
988 corner_radius,
989 corner_radius * 2.,
990 layout,
991 content_origin,
992 text_bounds,
993 cx,
994 );
995
996 if selection.is_local && !selection.range.is_empty() {
997 invisible_display_ranges.push(selection.range.clone());
998 }
999
1000 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1001 let cursor_position = selection.head;
1002 if layout
1003 .visible_display_row_range
1004 .contains(&cursor_position.row())
1005 {
1006 let cursor_row_layout = &layout.position_map.line_layouts
1007 [(cursor_position.row() - start_row) as usize]
1008 .line;
1009 let cursor_column = cursor_position.column() as usize;
1010
1011 let cursor_character_x =
1012 cursor_row_layout.x_for_index(cursor_column);
1013 let mut block_width = cursor_row_layout
1014 .x_for_index(cursor_column + 1)
1015 - cursor_character_x;
1016 if block_width == Pixels::ZERO {
1017 block_width = layout.position_map.em_width;
1018 }
1019 let block_text = if let CursorShape::Block = selection.cursor_shape
1020 {
1021 layout
1022 .position_map
1023 .snapshot
1024 .chars_at(cursor_position)
1025 .next()
1026 .and_then(|(character, _)| {
1027 let text = if character == '\n' {
1028 SharedString::from(" ")
1029 } else {
1030 SharedString::from(character.to_string())
1031 };
1032 let len = text.len();
1033 cx.text_system()
1034 .shape_line(
1035 text,
1036 cursor_row_layout.font_size,
1037 &[TextRun {
1038 len,
1039 font: self.style.text.font(),
1040 color: self.style.background,
1041 background_color: None,
1042 underline: None,
1043 }],
1044 )
1045 .log_err()
1046 })
1047 } else {
1048 None
1049 };
1050
1051 let x = cursor_character_x - layout.position_map.scroll_position.x;
1052 let y = cursor_position.row() as f32
1053 * layout.position_map.line_height
1054 - layout.position_map.scroll_position.y;
1055 if selection.is_newest {
1056 self.editor.update(cx, |editor, _| {
1057 editor.pixel_position_of_newest_cursor = Some(point(
1058 text_bounds.origin.x + x + block_width / 2.,
1059 text_bounds.origin.y
1060 + y
1061 + layout.position_map.line_height / 2.,
1062 ))
1063 });
1064 }
1065 cursors.push(Cursor {
1066 color: selection_style.cursor,
1067 block_width,
1068 origin: point(x, y),
1069 line_height: layout.position_map.line_height,
1070 shape: selection.cursor_shape,
1071 block_text,
1072 });
1073 }
1074 }
1075 }
1076 }
1077
1078 for (ix, line_with_invisibles) in
1079 layout.position_map.line_layouts.iter().enumerate()
1080 {
1081 let row = start_row + ix as u32;
1082 line_with_invisibles.draw(
1083 layout,
1084 row,
1085 content_origin,
1086 whitespace_setting,
1087 &invisible_display_ranges,
1088 cx,
1089 )
1090 }
1091
1092 cx.with_z_index(0, |cx| {
1093 for cursor in cursors {
1094 cursor.paint(content_origin, cx);
1095 }
1096 });
1097 },
1098 )
1099 }
1100
1101 fn paint_overlays(
1102 &mut self,
1103 text_bounds: Bounds<Pixels>,
1104 layout: &mut LayoutState,
1105 cx: &mut WindowContext,
1106 ) {
1107 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1108 let start_row = layout.visible_display_row_range.start;
1109 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1110 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1111 let context_menu_size = context_menu.measure(available_space, cx);
1112
1113 let cursor_row_layout =
1114 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1115 let x = cursor_row_layout.x_for_index(position.column() as usize)
1116 - layout.position_map.scroll_position.x;
1117 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1118 - layout.position_map.scroll_position.y;
1119 let mut list_origin = content_origin + point(x, y);
1120 let list_width = context_menu_size.width;
1121 let list_height = context_menu_size.height;
1122
1123 // Snap the right edge of the list to the right edge of the window if
1124 // its horizontal bounds overflow.
1125 if list_origin.x + list_width > cx.viewport_size().width {
1126 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1127 }
1128
1129 if list_origin.y + list_height > text_bounds.lower_right().y {
1130 list_origin.y -= layout.position_map.line_height + list_height;
1131 }
1132
1133 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1134 }
1135
1136 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1137 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1138
1139 // This is safe because we check on layout whether the required row is available
1140 let hovered_row_layout =
1141 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1142
1143 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1144 // height. This is the size we will use to decide whether to render popovers above or below
1145 // the hovered line.
1146 let first_size = hover_popovers[0].measure(available_space, cx);
1147 let height_to_reserve =
1148 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1149
1150 // Compute Hovered Point
1151 let x = hovered_row_layout.x_for_index(position.column() as usize)
1152 - layout.position_map.scroll_position.x;
1153 let y = position.row() as f32 * layout.position_map.line_height
1154 - layout.position_map.scroll_position.y;
1155 let hovered_point = content_origin + point(x, y);
1156
1157 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1158 // There is enough space above. Render popovers above the hovered point
1159 let mut current_y = hovered_point.y;
1160 for mut hover_popover in hover_popovers {
1161 let size = hover_popover.measure(available_space, cx);
1162 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1163
1164 let x_out_of_bounds =
1165 text_bounds.upper_right().x - (popover_origin.x + size.width);
1166 if x_out_of_bounds < Pixels::ZERO {
1167 popover_origin.x = popover_origin.x + x_out_of_bounds;
1168 }
1169
1170 cx.break_content_mask(|cx| {
1171 hover_popover.draw(popover_origin, available_space, cx)
1172 });
1173
1174 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1175 }
1176 } else {
1177 // There is not enough space above. Render popovers below the hovered point
1178 let mut current_y = hovered_point.y + layout.position_map.line_height;
1179 for mut hover_popover in hover_popovers {
1180 let size = hover_popover.measure(available_space, cx);
1181 let mut popover_origin = point(hovered_point.x, current_y);
1182
1183 let x_out_of_bounds =
1184 text_bounds.upper_right().x - (popover_origin.x + size.width);
1185 if x_out_of_bounds < Pixels::ZERO {
1186 popover_origin.x = popover_origin.x + x_out_of_bounds;
1187 }
1188
1189 hover_popover.draw(popover_origin, available_space, cx);
1190
1191 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1192 }
1193 }
1194 }
1195
1196 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1197 let element = overlay()
1198 .position(mouse_context_menu.position)
1199 .child(mouse_context_menu.context_menu.clone())
1200 .anchor(AnchorCorner::TopLeft)
1201 .snap_to_window();
1202 element.into_any().draw(
1203 gpui::Point::default(),
1204 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1205 cx,
1206 );
1207 }
1208 }
1209
1210 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1211 bounds.upper_right().x - self.style.scrollbar_width
1212 }
1213
1214 fn paint_scrollbar(
1215 &mut self,
1216 bounds: Bounds<Pixels>,
1217 layout: &mut LayoutState,
1218 cx: &mut WindowContext,
1219 ) {
1220 if layout.mode != EditorMode::Full {
1221 return;
1222 }
1223
1224 // If a drag took place after we started dragging the scrollbar,
1225 // cancel the scrollbar drag.
1226 if cx.has_active_drag() {
1227 self.editor.update(cx, |editor, cx| {
1228 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1229 });
1230 }
1231
1232 let top = bounds.origin.y;
1233 let bottom = bounds.lower_left().y;
1234 let right = bounds.lower_right().x;
1235 let left = self.scrollbar_left(&bounds);
1236 let row_range = layout.scrollbar_row_range.clone();
1237 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1238
1239 let mut height = bounds.size.height;
1240 let mut first_row_y_offset = px(0.0);
1241
1242 // Impose a minimum height on the scrollbar thumb
1243 let row_height = height / max_row;
1244 let min_thumb_height = layout.position_map.line_height;
1245 let thumb_height = (row_range.end - row_range.start) * row_height;
1246 if thumb_height < min_thumb_height {
1247 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1248 height -= min_thumb_height - thumb_height;
1249 }
1250
1251 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1252
1253 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1254 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1255 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1256 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1257
1258 if layout.show_scrollbars {
1259 cx.paint_quad(quad(
1260 track_bounds,
1261 Corners::default(),
1262 cx.theme().colors().scrollbar_track_background,
1263 Edges {
1264 top: Pixels::ZERO,
1265 right: Pixels::ZERO,
1266 bottom: Pixels::ZERO,
1267 left: px(1.),
1268 },
1269 cx.theme().colors().scrollbar_track_border,
1270 ));
1271 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1272 if layout.is_singleton && scrollbar_settings.selections {
1273 let start_anchor = Anchor::min();
1274 let end_anchor = Anchor::max();
1275 let background_ranges = self
1276 .editor
1277 .read(cx)
1278 .background_highlight_row_ranges::<BufferSearchHighlights>(
1279 start_anchor..end_anchor,
1280 &layout.position_map.snapshot,
1281 50000,
1282 );
1283 for range in background_ranges {
1284 let start_y = y_for_row(range.start().row() as f32);
1285 let mut end_y = y_for_row(range.end().row() as f32);
1286 if end_y - start_y < px(1.) {
1287 end_y = start_y + px(1.);
1288 }
1289 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1290 cx.paint_quad(quad(
1291 bounds,
1292 Corners::default(),
1293 cx.theme().status().info,
1294 Edges {
1295 top: Pixels::ZERO,
1296 right: px(1.),
1297 bottom: Pixels::ZERO,
1298 left: px(1.),
1299 },
1300 cx.theme().colors().scrollbar_thumb_border,
1301 ));
1302 }
1303 }
1304
1305 if layout.is_singleton && scrollbar_settings.git_diff {
1306 for hunk in layout
1307 .position_map
1308 .snapshot
1309 .buffer_snapshot
1310 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1311 {
1312 let start_display = Point::new(hunk.buffer_range.start, 0)
1313 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1314 let end_display = Point::new(hunk.buffer_range.end, 0)
1315 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1316 let start_y = y_for_row(start_display.row() as f32);
1317 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1318 y_for_row((end_display.row() + 1) as f32)
1319 } else {
1320 y_for_row((end_display.row()) as f32)
1321 };
1322
1323 if end_y - start_y < px(1.) {
1324 end_y = start_y + px(1.);
1325 }
1326 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1327
1328 let color = match hunk.status() {
1329 DiffHunkStatus::Added => cx.theme().status().created,
1330 DiffHunkStatus::Modified => cx.theme().status().modified,
1331 DiffHunkStatus::Removed => cx.theme().status().deleted,
1332 };
1333 cx.paint_quad(quad(
1334 bounds,
1335 Corners::default(),
1336 color,
1337 Edges {
1338 top: Pixels::ZERO,
1339 right: px(1.),
1340 bottom: Pixels::ZERO,
1341 left: px(1.),
1342 },
1343 cx.theme().colors().scrollbar_thumb_border,
1344 ));
1345 }
1346 }
1347
1348 cx.paint_quad(quad(
1349 thumb_bounds,
1350 Corners::default(),
1351 cx.theme().colors().scrollbar_thumb_background,
1352 Edges {
1353 top: Pixels::ZERO,
1354 right: px(1.),
1355 bottom: Pixels::ZERO,
1356 left: px(1.),
1357 },
1358 cx.theme().colors().scrollbar_thumb_border,
1359 ));
1360 }
1361
1362 let interactive_track_bounds = InteractiveBounds {
1363 bounds: track_bounds,
1364 stacking_order: cx.stacking_order().clone(),
1365 };
1366 let mut mouse_position = cx.mouse_position();
1367 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1368 cx.set_cursor_style(CursorStyle::Arrow);
1369 }
1370
1371 cx.on_mouse_event({
1372 let editor = self.editor.clone();
1373 move |event: &MouseMoveEvent, phase, cx| {
1374 if phase == DispatchPhase::Capture {
1375 return;
1376 }
1377
1378 editor.update(cx, |editor, cx| {
1379 if event.pressed_button == Some(MouseButton::Left)
1380 && editor.scroll_manager.is_dragging_scrollbar()
1381 {
1382 let y = mouse_position.y;
1383 let new_y = event.position.y;
1384 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1385 let mut position = editor.scroll_position(cx);
1386 position.y += (new_y - y) * (max_row as f32) / height;
1387 if position.y < 0.0 {
1388 position.y = 0.0;
1389 }
1390 editor.set_scroll_position(position, cx);
1391 }
1392
1393 mouse_position = event.position;
1394 cx.stop_propagation();
1395 } else {
1396 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1397 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1398 editor.scroll_manager.show_scrollbar(cx);
1399 }
1400 }
1401 })
1402 }
1403 });
1404
1405 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1406 cx.on_mouse_event({
1407 let editor = self.editor.clone();
1408 move |_: &MouseUpEvent, phase, cx| {
1409 if phase == DispatchPhase::Capture {
1410 return;
1411 }
1412
1413 editor.update(cx, |editor, cx| {
1414 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1415 cx.stop_propagation();
1416 });
1417 }
1418 });
1419 } else {
1420 cx.on_mouse_event({
1421 let editor = self.editor.clone();
1422 move |event: &MouseDownEvent, phase, cx| {
1423 if phase == DispatchPhase::Capture {
1424 return;
1425 }
1426
1427 editor.update(cx, |editor, cx| {
1428 if track_bounds.contains(&event.position) {
1429 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1430
1431 let y = event.position.y;
1432 if y < thumb_top || thumb_bottom < y {
1433 let center_row =
1434 ((y - top) * max_row as f32 / height).round() as u32;
1435 let top_row = center_row
1436 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1437 let mut position = editor.scroll_position(cx);
1438 position.y = top_row as f32;
1439 editor.set_scroll_position(position, cx);
1440 } else {
1441 editor.scroll_manager.show_scrollbar(cx);
1442 }
1443
1444 cx.stop_propagation();
1445 }
1446 });
1447 }
1448 });
1449 }
1450 }
1451
1452 #[allow(clippy::too_many_arguments)]
1453 fn paint_highlighted_range(
1454 &self,
1455 range: Range<DisplayPoint>,
1456 color: Hsla,
1457 corner_radius: Pixels,
1458 line_end_overshoot: Pixels,
1459 layout: &LayoutState,
1460 content_origin: gpui::Point<Pixels>,
1461 bounds: Bounds<Pixels>,
1462 cx: &mut WindowContext,
1463 ) {
1464 let start_row = layout.visible_display_row_range.start;
1465 let end_row = layout.visible_display_row_range.end;
1466 if range.start != range.end {
1467 let row_range = if range.end.column() == 0 {
1468 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1469 } else {
1470 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1471 };
1472
1473 let highlighted_range = HighlightedRange {
1474 color,
1475 line_height: layout.position_map.line_height,
1476 corner_radius,
1477 start_y: content_origin.y
1478 + row_range.start as f32 * layout.position_map.line_height
1479 - layout.position_map.scroll_position.y,
1480 lines: row_range
1481 .into_iter()
1482 .map(|row| {
1483 let line_layout =
1484 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1485 HighlightedRangeLine {
1486 start_x: if row == range.start.row() {
1487 content_origin.x
1488 + line_layout.x_for_index(range.start.column() as usize)
1489 - layout.position_map.scroll_position.x
1490 } else {
1491 content_origin.x - layout.position_map.scroll_position.x
1492 },
1493 end_x: if row == range.end.row() {
1494 content_origin.x
1495 + line_layout.x_for_index(range.end.column() as usize)
1496 - layout.position_map.scroll_position.x
1497 } else {
1498 content_origin.x + line_layout.width + line_end_overshoot
1499 - layout.position_map.scroll_position.x
1500 },
1501 }
1502 })
1503 .collect(),
1504 };
1505
1506 highlighted_range.paint(bounds, cx);
1507 }
1508 }
1509
1510 fn paint_blocks(
1511 &mut self,
1512 bounds: Bounds<Pixels>,
1513 layout: &mut LayoutState,
1514 cx: &mut WindowContext,
1515 ) {
1516 let scroll_position = layout.position_map.snapshot.scroll_position();
1517 let scroll_left = scroll_position.x * layout.position_map.em_width;
1518 let scroll_top = scroll_position.y * layout.position_map.line_height;
1519
1520 for mut block in layout.blocks.drain(..) {
1521 let mut origin = bounds.origin
1522 + point(
1523 Pixels::ZERO,
1524 block.row as f32 * layout.position_map.line_height - scroll_top,
1525 );
1526 if !matches!(block.style, BlockStyle::Sticky) {
1527 origin += point(-scroll_left, Pixels::ZERO);
1528 }
1529 block.element.draw(origin, block.available_space, cx);
1530 }
1531 }
1532
1533 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1534 let style = &self.style;
1535 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1536 let layout = cx
1537 .text_system()
1538 .shape_line(
1539 SharedString::from(" ".repeat(column)),
1540 font_size,
1541 &[TextRun {
1542 len: column,
1543 font: style.text.font(),
1544 color: Hsla::default(),
1545 background_color: None,
1546 underline: None,
1547 }],
1548 )
1549 .unwrap();
1550
1551 layout.width
1552 }
1553
1554 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1555 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1556 self.column_pixels(digit_count, cx)
1557 }
1558
1559 //Folds contained in a hunk are ignored apart from shrinking visual size
1560 //If a fold contains any hunks then that fold line is marked as modified
1561 fn layout_git_gutters(
1562 &self,
1563 display_rows: Range<u32>,
1564 snapshot: &EditorSnapshot,
1565 ) -> Vec<DisplayDiffHunk> {
1566 let buffer_snapshot = &snapshot.buffer_snapshot;
1567
1568 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1569 .to_point(snapshot)
1570 .row;
1571 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1572 .to_point(snapshot)
1573 .row;
1574
1575 buffer_snapshot
1576 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1577 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1578 .dedup()
1579 .collect()
1580 }
1581
1582 fn calculate_relative_line_numbers(
1583 &self,
1584 snapshot: &EditorSnapshot,
1585 rows: &Range<u32>,
1586 relative_to: Option<u32>,
1587 ) -> HashMap<u32, u32> {
1588 let mut relative_rows: HashMap<u32, u32> = Default::default();
1589 let Some(relative_to) = relative_to else {
1590 return relative_rows;
1591 };
1592
1593 let start = rows.start.min(relative_to);
1594 let end = rows.end.max(relative_to);
1595
1596 let buffer_rows = snapshot
1597 .buffer_rows(start)
1598 .take(1 + (end - start) as usize)
1599 .collect::<Vec<_>>();
1600
1601 let head_idx = relative_to - start;
1602 let mut delta = 1;
1603 let mut i = head_idx + 1;
1604 while i < buffer_rows.len() as u32 {
1605 if buffer_rows[i as usize].is_some() {
1606 if rows.contains(&(i + start)) {
1607 relative_rows.insert(i + start, delta);
1608 }
1609 delta += 1;
1610 }
1611 i += 1;
1612 }
1613 delta = 1;
1614 i = head_idx.min(buffer_rows.len() as u32 - 1);
1615 while i > 0 && buffer_rows[i as usize].is_none() {
1616 i -= 1;
1617 }
1618
1619 while i > 0 {
1620 i -= 1;
1621 if buffer_rows[i as usize].is_some() {
1622 if rows.contains(&(i + start)) {
1623 relative_rows.insert(i + start, delta);
1624 }
1625 delta += 1;
1626 }
1627 }
1628
1629 relative_rows
1630 }
1631
1632 fn shape_line_numbers(
1633 &self,
1634 rows: Range<u32>,
1635 active_rows: &BTreeMap<u32, bool>,
1636 newest_selection_head: DisplayPoint,
1637 is_singleton: bool,
1638 snapshot: &EditorSnapshot,
1639 cx: &ViewContext<Editor>,
1640 ) -> (
1641 Vec<Option<ShapedLine>>,
1642 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1643 ) {
1644 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1645 let include_line_numbers = snapshot.mode == EditorMode::Full;
1646 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1647 let mut fold_statuses = Vec::with_capacity(rows.len());
1648 let mut line_number = String::new();
1649 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1650 let relative_to = if is_relative {
1651 Some(newest_selection_head.row())
1652 } else {
1653 None
1654 };
1655
1656 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1657
1658 for (ix, row) in snapshot
1659 .buffer_rows(rows.start)
1660 .take((rows.end - rows.start) as usize)
1661 .enumerate()
1662 {
1663 let display_row = rows.start + ix as u32;
1664 let (active, color) = if active_rows.contains_key(&display_row) {
1665 (true, cx.theme().colors().editor_active_line_number)
1666 } else {
1667 (false, cx.theme().colors().editor_line_number)
1668 };
1669 if let Some(buffer_row) = row {
1670 if include_line_numbers {
1671 line_number.clear();
1672 let default_number = buffer_row + 1;
1673 let number = relative_rows
1674 .get(&(ix as u32 + rows.start))
1675 .unwrap_or(&default_number);
1676 write!(&mut line_number, "{}", number).unwrap();
1677 let run = TextRun {
1678 len: line_number.len(),
1679 font: self.style.text.font(),
1680 color,
1681 background_color: None,
1682 underline: None,
1683 };
1684 let shaped_line = cx
1685 .text_system()
1686 .shape_line(line_number.clone().into(), font_size, &[run])
1687 .unwrap();
1688 shaped_line_numbers.push(Some(shaped_line));
1689 fold_statuses.push(
1690 is_singleton
1691 .then(|| {
1692 snapshot
1693 .fold_for_line(buffer_row)
1694 .map(|fold_status| (fold_status, buffer_row, active))
1695 })
1696 .flatten(),
1697 )
1698 }
1699 } else {
1700 fold_statuses.push(None);
1701 shaped_line_numbers.push(None);
1702 }
1703 }
1704
1705 (shaped_line_numbers, fold_statuses)
1706 }
1707
1708 fn layout_lines(
1709 &self,
1710 rows: Range<u32>,
1711 line_number_layouts: &[Option<ShapedLine>],
1712 snapshot: &EditorSnapshot,
1713 cx: &ViewContext<Editor>,
1714 ) -> Vec<LineWithInvisibles> {
1715 if rows.start >= rows.end {
1716 return Vec::new();
1717 }
1718
1719 // Show the placeholder when the editor is empty
1720 if snapshot.is_empty() {
1721 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1722 let placeholder_color = cx.theme().colors().text_placeholder;
1723 let placeholder_text = snapshot.placeholder_text();
1724
1725 let placeholder_lines = placeholder_text
1726 .as_ref()
1727 .map_or("", AsRef::as_ref)
1728 .split('\n')
1729 .skip(rows.start as usize)
1730 .chain(iter::repeat(""))
1731 .take(rows.len());
1732 placeholder_lines
1733 .filter_map(move |line| {
1734 let run = TextRun {
1735 len: line.len(),
1736 font: self.style.text.font(),
1737 color: placeholder_color,
1738 background_color: None,
1739 underline: Default::default(),
1740 };
1741 cx.text_system()
1742 .shape_line(line.to_string().into(), font_size, &[run])
1743 .log_err()
1744 })
1745 .map(|line| LineWithInvisibles {
1746 line,
1747 invisibles: Vec::new(),
1748 })
1749 .collect()
1750 } else {
1751 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1752 LineWithInvisibles::from_chunks(
1753 chunks,
1754 &self.style.text,
1755 MAX_LINE_LEN,
1756 rows.len() as usize,
1757 line_number_layouts,
1758 snapshot.mode,
1759 cx,
1760 )
1761 }
1762 }
1763
1764 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1765 self.editor.update(cx, |editor, cx| {
1766 let snapshot = editor.snapshot(cx);
1767 let style = self.style.clone();
1768
1769 let font_id = cx.text_system().resolve_font(&style.text.font());
1770 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1771 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1772 let em_width = cx
1773 .text_system()
1774 .typographic_bounds(font_id, font_size, 'm')
1775 .unwrap()
1776 .size
1777 .width;
1778 let em_advance = cx
1779 .text_system()
1780 .advance(font_id, font_size, 'm')
1781 .unwrap()
1782 .width;
1783
1784 let gutter_padding;
1785 let gutter_width;
1786 let gutter_margin;
1787 if snapshot.show_gutter {
1788 let descent = cx.text_system().descent(font_id, font_size);
1789
1790 let gutter_padding_factor = 3.5;
1791 gutter_padding = (em_width * gutter_padding_factor).round();
1792 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1793 gutter_margin = -descent;
1794 } else {
1795 gutter_padding = Pixels::ZERO;
1796 gutter_width = Pixels::ZERO;
1797 gutter_margin = Pixels::ZERO;
1798 };
1799
1800 editor.gutter_width = gutter_width;
1801
1802 let text_width = bounds.size.width - gutter_width;
1803 let overscroll = size(em_width, px(0.));
1804 let _snapshot = {
1805 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1806
1807 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1808 let wrap_width = match editor.soft_wrap_mode(cx) {
1809 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1810 SoftWrap::EditorWidth => editor_width,
1811 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1812 };
1813
1814 if editor.set_wrap_width(Some(wrap_width), cx) {
1815 editor.snapshot(cx)
1816 } else {
1817 snapshot
1818 }
1819 };
1820
1821 let wrap_guides = editor
1822 .wrap_guides(cx)
1823 .iter()
1824 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1825 .collect::<SmallVec<[_; 2]>>();
1826
1827 let gutter_size = size(gutter_width, bounds.size.height);
1828 let text_size = size(text_width, bounds.size.height);
1829
1830 let autoscroll_horizontally =
1831 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1832 let mut snapshot = editor.snapshot(cx);
1833
1834 let scroll_position = snapshot.scroll_position();
1835 // The scroll position is a fractional point, the whole number of which represents
1836 // the top of the window in terms of display rows.
1837 let start_row = scroll_position.y as u32;
1838 let height_in_lines = f32::from(bounds.size.height / line_height);
1839 let max_row = snapshot.max_point().row();
1840
1841 // Add 1 to ensure selections bleed off screen
1842 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1843
1844 let start_anchor = if start_row == 0 {
1845 Anchor::min()
1846 } else {
1847 snapshot
1848 .buffer_snapshot
1849 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1850 };
1851 let end_anchor = if end_row > max_row {
1852 Anchor::max()
1853 } else {
1854 snapshot
1855 .buffer_snapshot
1856 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1857 };
1858
1859 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1860 let mut active_rows = BTreeMap::new();
1861 let is_singleton = editor.is_singleton(cx);
1862
1863 let highlighted_rows = editor.highlighted_rows();
1864 let highlighted_ranges = editor.background_highlights_in_range(
1865 start_anchor..end_anchor,
1866 &snapshot.display_snapshot,
1867 cx.theme().colors(),
1868 );
1869
1870 let mut newest_selection_head = None;
1871
1872 if editor.show_local_selections {
1873 let mut local_selections: Vec<Selection<Point>> = editor
1874 .selections
1875 .disjoint_in_range(start_anchor..end_anchor, cx);
1876 local_selections.extend(editor.selections.pending(cx));
1877 let mut layouts = Vec::new();
1878 let newest = editor.selections.newest(cx);
1879 for selection in local_selections.drain(..) {
1880 let is_empty = selection.start == selection.end;
1881 let is_newest = selection == newest;
1882
1883 let layout = SelectionLayout::new(
1884 selection,
1885 editor.selections.line_mode,
1886 editor.cursor_shape,
1887 &snapshot.display_snapshot,
1888 is_newest,
1889 true,
1890 );
1891 if is_newest {
1892 newest_selection_head = Some(layout.head);
1893 }
1894
1895 for row in cmp::max(layout.active_rows.start, start_row)
1896 ..=cmp::min(layout.active_rows.end, end_row)
1897 {
1898 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1899 *contains_non_empty_selection |= !is_empty;
1900 }
1901 layouts.push(layout);
1902 }
1903
1904 let player = if editor.read_only(cx) {
1905 cx.theme().players().read_only()
1906 } else {
1907 style.local_player
1908 };
1909
1910 selections.push((player, layouts));
1911 }
1912
1913 if let Some(collaboration_hub) = &editor.collaboration_hub {
1914 // When following someone, render the local selections in their color.
1915 if let Some(leader_id) = editor.leader_peer_id {
1916 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1917 if let Some(participant_index) = collaboration_hub
1918 .user_participant_indices(cx)
1919 .get(&collaborator.user_id)
1920 {
1921 if let Some((local_selection_style, _)) = selections.first_mut() {
1922 *local_selection_style = cx
1923 .theme()
1924 .players()
1925 .color_for_participant(participant_index.0);
1926 }
1927 }
1928 }
1929 }
1930
1931 let mut remote_selections = HashMap::default();
1932 for selection in snapshot.remote_selections_in_range(
1933 &(start_anchor..end_anchor),
1934 collaboration_hub.as_ref(),
1935 cx,
1936 ) {
1937 let selection_style = if let Some(participant_index) = selection.participant_index {
1938 cx.theme()
1939 .players()
1940 .color_for_participant(participant_index.0)
1941 } else {
1942 cx.theme().players().absent()
1943 };
1944
1945 // Don't re-render the leader's selections, since the local selections
1946 // match theirs.
1947 if Some(selection.peer_id) == editor.leader_peer_id {
1948 continue;
1949 }
1950
1951 remote_selections
1952 .entry(selection.replica_id)
1953 .or_insert((selection_style, Vec::new()))
1954 .1
1955 .push(SelectionLayout::new(
1956 selection.selection,
1957 selection.line_mode,
1958 selection.cursor_shape,
1959 &snapshot.display_snapshot,
1960 false,
1961 false,
1962 ));
1963 }
1964
1965 selections.extend(remote_selections.into_values());
1966 }
1967
1968 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1969 let show_scrollbars = match scrollbar_settings.show {
1970 ShowScrollbar::Auto => {
1971 // Git
1972 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1973 ||
1974 // Selections
1975 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
1976 // Scrollmanager
1977 || editor.scroll_manager.scrollbars_visible()
1978 }
1979 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1980 ShowScrollbar::Always => true,
1981 ShowScrollbar::Never => false,
1982 };
1983
1984 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1985 let newest = editor.selections.newest::<Point>(cx);
1986 SelectionLayout::new(
1987 newest,
1988 editor.selections.line_mode,
1989 editor.cursor_shape,
1990 &snapshot.display_snapshot,
1991 true,
1992 true,
1993 )
1994 .head
1995 });
1996
1997 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1998 start_row..end_row,
1999 &active_rows,
2000 head_for_relative,
2001 is_singleton,
2002 &snapshot,
2003 cx,
2004 );
2005
2006 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2007
2008 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2009
2010 let mut max_visible_line_width = Pixels::ZERO;
2011 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2012 for line_with_invisibles in &line_layouts {
2013 if line_with_invisibles.line.width > max_visible_line_width {
2014 max_visible_line_width = line_with_invisibles.line.width;
2015 }
2016 }
2017
2018 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2019 .unwrap()
2020 .width;
2021 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2022
2023 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2024 self.layout_blocks(
2025 start_row..end_row,
2026 &snapshot,
2027 bounds.size.width,
2028 scroll_width,
2029 gutter_padding,
2030 gutter_width,
2031 em_width,
2032 gutter_width + gutter_margin,
2033 line_height,
2034 &style,
2035 &line_layouts,
2036 editor,
2037 cx,
2038 )
2039 });
2040
2041 let scroll_max = point(
2042 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2043 max_row as f32,
2044 );
2045
2046 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2047
2048 let autoscrolled = if autoscroll_horizontally {
2049 editor.autoscroll_horizontally(
2050 start_row,
2051 text_size.width,
2052 scroll_width,
2053 em_width,
2054 &line_layouts,
2055 cx,
2056 )
2057 } else {
2058 false
2059 };
2060
2061 if clamped || autoscrolled {
2062 snapshot = editor.snapshot(cx);
2063 }
2064
2065 let mut context_menu = None;
2066 let mut code_actions_indicator = None;
2067 if let Some(newest_selection_head) = newest_selection_head {
2068 if (start_row..end_row).contains(&newest_selection_head.row()) {
2069 if editor.context_menu_visible() {
2070 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2071 context_menu =
2072 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2073 }
2074
2075 let active = matches!(
2076 editor.context_menu.read().as_ref(),
2077 Some(crate::ContextMenu::CodeActions(_))
2078 );
2079
2080 code_actions_indicator = editor
2081 .render_code_actions_indicator(&style, active, cx)
2082 .map(|element| CodeActionsIndicator {
2083 row: newest_selection_head.row(),
2084 button: element,
2085 });
2086 }
2087 }
2088
2089 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2090 let max_size = size(
2091 (120. * em_width) // Default size
2092 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2093 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2094 (16. * line_height) // Default size
2095 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2096 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2097 );
2098
2099 let hover = editor.hover_state.render(
2100 &snapshot,
2101 &style,
2102 visible_rows,
2103 max_size,
2104 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2105 cx,
2106 );
2107
2108 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2109 editor.render_fold_indicators(
2110 fold_statuses,
2111 &style,
2112 editor.gutter_hovered,
2113 line_height,
2114 gutter_margin,
2115 cx,
2116 )
2117 });
2118
2119 let invisible_symbol_font_size = font_size / 2.;
2120 let tab_invisible = cx
2121 .text_system()
2122 .shape_line(
2123 "→".into(),
2124 invisible_symbol_font_size,
2125 &[TextRun {
2126 len: "→".len(),
2127 font: self.style.text.font(),
2128 color: cx.theme().colors().editor_invisible,
2129 background_color: None,
2130 underline: None,
2131 }],
2132 )
2133 .unwrap();
2134 let space_invisible = cx
2135 .text_system()
2136 .shape_line(
2137 "•".into(),
2138 invisible_symbol_font_size,
2139 &[TextRun {
2140 len: "•".len(),
2141 font: self.style.text.font(),
2142 color: cx.theme().colors().editor_invisible,
2143 background_color: None,
2144 underline: None,
2145 }],
2146 )
2147 .unwrap();
2148
2149 LayoutState {
2150 mode: snapshot.mode,
2151 position_map: Arc::new(PositionMap {
2152 size: bounds.size,
2153 scroll_position: point(
2154 scroll_position.x * em_width,
2155 scroll_position.y * line_height,
2156 ),
2157 scroll_max,
2158 line_layouts,
2159 line_height,
2160 em_width,
2161 em_advance,
2162 snapshot,
2163 }),
2164 visible_anchor_range: start_anchor..end_anchor,
2165 visible_display_row_range: start_row..end_row,
2166 wrap_guides,
2167 gutter_size,
2168 gutter_padding,
2169 text_size,
2170 scrollbar_row_range,
2171 show_scrollbars,
2172 is_singleton,
2173 max_row,
2174 gutter_margin,
2175 active_rows,
2176 highlighted_rows,
2177 highlighted_ranges,
2178 line_numbers,
2179 display_hunks,
2180 blocks,
2181 selections,
2182 context_menu,
2183 code_actions_indicator,
2184 fold_indicators,
2185 tab_invisible,
2186 space_invisible,
2187 hover_popovers: hover,
2188 }
2189 })
2190 }
2191
2192 #[allow(clippy::too_many_arguments)]
2193 fn layout_blocks(
2194 &self,
2195 rows: Range<u32>,
2196 snapshot: &EditorSnapshot,
2197 editor_width: Pixels,
2198 scroll_width: Pixels,
2199 gutter_padding: Pixels,
2200 gutter_width: Pixels,
2201 em_width: Pixels,
2202 text_x: Pixels,
2203 line_height: Pixels,
2204 style: &EditorStyle,
2205 line_layouts: &[LineWithInvisibles],
2206 editor: &mut Editor,
2207 cx: &mut ViewContext<Editor>,
2208 ) -> (Pixels, Vec<BlockLayout>) {
2209 let mut block_id = 0;
2210 let (fixed_blocks, non_fixed_blocks) = snapshot
2211 .blocks_in_range(rows.clone())
2212 .partition::<Vec<_>, _>(|(_, block)| match block {
2213 TransformBlock::ExcerptHeader { .. } => false,
2214 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2215 });
2216
2217 let render_block = |block: &TransformBlock,
2218 available_space: Size<AvailableSpace>,
2219 block_id: usize,
2220 editor: &mut Editor,
2221 cx: &mut ViewContext<Editor>| {
2222 let mut element = match block {
2223 TransformBlock::Custom(block) => {
2224 let align_to = block
2225 .position()
2226 .to_point(&snapshot.buffer_snapshot)
2227 .to_display_point(snapshot);
2228 let anchor_x = text_x
2229 + if rows.contains(&align_to.row()) {
2230 line_layouts[(align_to.row() - rows.start) as usize]
2231 .line
2232 .x_for_index(align_to.column() as usize)
2233 } else {
2234 layout_line(align_to.row(), snapshot, style, cx)
2235 .unwrap()
2236 .x_for_index(align_to.column() as usize)
2237 };
2238
2239 block.render(&mut BlockContext {
2240 view_context: cx,
2241 anchor_x,
2242 gutter_padding,
2243 line_height,
2244 gutter_width,
2245 em_width,
2246 block_id,
2247 editor_style: &self.style,
2248 })
2249 }
2250
2251 TransformBlock::ExcerptHeader {
2252 buffer,
2253 range,
2254 starts_new_buffer,
2255 ..
2256 } => {
2257 let include_root = editor
2258 .project
2259 .as_ref()
2260 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2261 .unwrap_or_default();
2262
2263 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2264 let jump_path = ProjectPath {
2265 worktree_id: file.worktree_id(cx),
2266 path: file.path.clone(),
2267 };
2268 let jump_anchor = range
2269 .primary
2270 .as_ref()
2271 .map_or(range.context.start, |primary| primary.start);
2272 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2273
2274 cx.listener_for(&self.editor, move |editor, _, cx| {
2275 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2276 })
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_flex()
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_flex().gap_3().child(
2310 h_flex()
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_flex()
2343 .id(("collapsed context", block_id))
2344 .size_full()
2345 .gap(gutter_padding)
2346 .child(
2347 h_flex()
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 .child(
2357 ButtonLike::new("jump to collapsed context")
2358 .style(ButtonStyle::Transparent)
2359 .full_width()
2360 .child(
2361 div()
2362 .h_px()
2363 .w_full()
2364 .bg(cx.theme().colors().border_variant)
2365 .group_hover("", |style| {
2366 style.bg(cx.theme().colors().border)
2367 }),
2368 )
2369 .when_some(jump_handler, |this, jump_handler| {
2370 this.on_click(jump_handler).tooltip(|cx| {
2371 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2372 })
2373 }),
2374 )
2375 };
2376 element.into_any()
2377 }
2378 };
2379
2380 let size = element.measure(available_space, cx);
2381 (element, size)
2382 };
2383
2384 let mut fixed_block_max_width = Pixels::ZERO;
2385 let mut blocks = Vec::new();
2386 for (row, block) in fixed_blocks {
2387 let available_space = size(
2388 AvailableSpace::MinContent,
2389 AvailableSpace::Definite(block.height() as f32 * line_height),
2390 );
2391 let (element, element_size) =
2392 render_block(block, available_space, block_id, editor, cx);
2393 block_id += 1;
2394 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2395 blocks.push(BlockLayout {
2396 row,
2397 element,
2398 available_space,
2399 style: BlockStyle::Fixed,
2400 });
2401 }
2402 for (row, block) in non_fixed_blocks {
2403 let style = match block {
2404 TransformBlock::Custom(block) => block.style(),
2405 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2406 };
2407 let width = match style {
2408 BlockStyle::Sticky => editor_width,
2409 BlockStyle::Flex => editor_width
2410 .max(fixed_block_max_width)
2411 .max(gutter_width + scroll_width),
2412 BlockStyle::Fixed => unreachable!(),
2413 };
2414 let available_space = size(
2415 AvailableSpace::Definite(width),
2416 AvailableSpace::Definite(block.height() as f32 * line_height),
2417 );
2418 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2419 block_id += 1;
2420 blocks.push(BlockLayout {
2421 row,
2422 element,
2423 available_space,
2424 style,
2425 });
2426 }
2427 (
2428 scroll_width.max(fixed_block_max_width - gutter_width),
2429 blocks,
2430 )
2431 }
2432
2433 fn paint_scroll_wheel_listener(
2434 &mut self,
2435 interactive_bounds: &InteractiveBounds,
2436 layout: &LayoutState,
2437 cx: &mut WindowContext,
2438 ) {
2439 cx.on_mouse_event({
2440 let position_map = layout.position_map.clone();
2441 let editor = self.editor.clone();
2442 let interactive_bounds = interactive_bounds.clone();
2443 let mut delta = ScrollDelta::default();
2444
2445 move |event: &ScrollWheelEvent, phase, cx| {
2446 if phase == DispatchPhase::Bubble
2447 && interactive_bounds.visibly_contains(&event.position, cx)
2448 {
2449 delta = delta.coalesce(event.delta);
2450 editor.update(cx, |editor, cx| {
2451 let position = event.position;
2452 let position_map: &PositionMap = &position_map;
2453 let bounds = &interactive_bounds;
2454 if !bounds.visibly_contains(&position, cx) {
2455 return;
2456 }
2457
2458 let line_height = position_map.line_height;
2459 let max_glyph_width = position_map.em_width;
2460 let (delta, axis) = match delta {
2461 gpui::ScrollDelta::Pixels(mut pixels) => {
2462 //Trackpad
2463 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2464 (pixels, axis)
2465 }
2466
2467 gpui::ScrollDelta::Lines(lines) => {
2468 //Not trackpad
2469 let pixels =
2470 point(lines.x * max_glyph_width, lines.y * line_height);
2471 (pixels, None)
2472 }
2473 };
2474
2475 let scroll_position = position_map.snapshot.scroll_position();
2476 let x = f32::from(
2477 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2478 );
2479 let y =
2480 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2481 let scroll_position =
2482 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2483 editor.scroll(scroll_position, axis, cx);
2484 cx.stop_propagation();
2485 });
2486 }
2487 }
2488 });
2489 }
2490
2491 fn paint_mouse_listeners(
2492 &mut self,
2493 bounds: Bounds<Pixels>,
2494 gutter_bounds: Bounds<Pixels>,
2495 text_bounds: Bounds<Pixels>,
2496 layout: &LayoutState,
2497 cx: &mut WindowContext,
2498 ) {
2499 let interactive_bounds = InteractiveBounds {
2500 bounds: bounds.intersect(&cx.content_mask().bounds),
2501 stacking_order: cx.stacking_order().clone(),
2502 };
2503
2504 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2505
2506 cx.on_mouse_event({
2507 let position_map = layout.position_map.clone();
2508 let editor = self.editor.clone();
2509 let stacking_order = cx.stacking_order().clone();
2510 let interactive_bounds = interactive_bounds.clone();
2511
2512 move |event: &MouseDownEvent, phase, cx| {
2513 if phase == DispatchPhase::Bubble
2514 && interactive_bounds.visibly_contains(&event.position, cx)
2515 {
2516 match event.button {
2517 MouseButton::Left => editor.update(cx, |editor, cx| {
2518 Self::mouse_left_down(
2519 editor,
2520 event,
2521 &position_map,
2522 text_bounds,
2523 gutter_bounds,
2524 &stacking_order,
2525 cx,
2526 );
2527 }),
2528 MouseButton::Right => editor.update(cx, |editor, cx| {
2529 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2530 }),
2531 _ => {}
2532 };
2533 }
2534 }
2535 });
2536
2537 cx.on_mouse_event({
2538 let position_map = layout.position_map.clone();
2539 let editor = self.editor.clone();
2540 let stacking_order = cx.stacking_order().clone();
2541 let interactive_bounds = interactive_bounds.clone();
2542
2543 move |event: &MouseUpEvent, phase, cx| {
2544 if phase == DispatchPhase::Bubble
2545 && interactive_bounds.visibly_contains(&event.position, cx)
2546 {
2547 editor.update(cx, |editor, cx| {
2548 Self::mouse_up(
2549 editor,
2550 event,
2551 &position_map,
2552 text_bounds,
2553 &stacking_order,
2554 cx,
2555 )
2556 });
2557 }
2558 }
2559 });
2560 cx.on_mouse_event({
2561 let position_map = layout.position_map.clone();
2562 let editor = self.editor.clone();
2563 let stacking_order = cx.stacking_order().clone();
2564
2565 move |event: &MouseMoveEvent, phase, cx| {
2566 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2567
2568 if phase == DispatchPhase::Bubble {
2569 editor.update(cx, |editor, cx| {
2570 if event.pressed_button == Some(MouseButton::Left) {
2571 Self::mouse_dragged(
2572 editor,
2573 event,
2574 &position_map,
2575 text_bounds,
2576 gutter_bounds,
2577 &stacking_order,
2578 cx,
2579 )
2580 }
2581
2582 if interactive_bounds.visibly_contains(&event.position, cx) {
2583 Self::mouse_moved(
2584 editor,
2585 event,
2586 &position_map,
2587 text_bounds,
2588 gutter_bounds,
2589 &stacking_order,
2590 cx,
2591 )
2592 }
2593 });
2594 }
2595 }
2596 });
2597 }
2598}
2599
2600#[derive(Debug)]
2601pub struct LineWithInvisibles {
2602 pub line: ShapedLine,
2603 invisibles: Vec<Invisible>,
2604}
2605
2606impl LineWithInvisibles {
2607 fn from_chunks<'a>(
2608 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2609 text_style: &TextStyle,
2610 max_line_len: usize,
2611 max_line_count: usize,
2612 line_number_layouts: &[Option<ShapedLine>],
2613 editor_mode: EditorMode,
2614 cx: &WindowContext,
2615 ) -> Vec<Self> {
2616 let mut layouts = Vec::with_capacity(max_line_count);
2617 let mut line = String::new();
2618 let mut invisibles = Vec::new();
2619 let mut styles = Vec::new();
2620 let mut non_whitespace_added = false;
2621 let mut row = 0;
2622 let mut line_exceeded_max_len = false;
2623 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2624
2625 for highlighted_chunk in chunks.chain([HighlightedChunk {
2626 chunk: "\n",
2627 style: None,
2628 is_tab: false,
2629 }]) {
2630 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2631 if ix > 0 {
2632 let shaped_line = cx
2633 .text_system()
2634 .shape_line(line.clone().into(), font_size, &styles)
2635 .unwrap();
2636 layouts.push(Self {
2637 line: shaped_line,
2638 invisibles: invisibles.drain(..).collect(),
2639 });
2640
2641 line.clear();
2642 styles.clear();
2643 row += 1;
2644 line_exceeded_max_len = false;
2645 non_whitespace_added = false;
2646 if row == max_line_count {
2647 return layouts;
2648 }
2649 }
2650
2651 if !line_chunk.is_empty() && !line_exceeded_max_len {
2652 let text_style = if let Some(style) = highlighted_chunk.style {
2653 Cow::Owned(text_style.clone().highlight(style))
2654 } else {
2655 Cow::Borrowed(text_style)
2656 };
2657
2658 if line.len() + line_chunk.len() > max_line_len {
2659 let mut chunk_len = max_line_len - line.len();
2660 while !line_chunk.is_char_boundary(chunk_len) {
2661 chunk_len -= 1;
2662 }
2663 line_chunk = &line_chunk[..chunk_len];
2664 line_exceeded_max_len = true;
2665 }
2666
2667 styles.push(TextRun {
2668 len: line_chunk.len(),
2669 font: text_style.font(),
2670 color: text_style.color,
2671 background_color: text_style.background_color,
2672 underline: text_style.underline,
2673 });
2674
2675 if editor_mode == EditorMode::Full {
2676 // Line wrap pads its contents with fake whitespaces,
2677 // avoid printing them
2678 let inside_wrapped_string = line_number_layouts
2679 .get(row)
2680 .and_then(|layout| layout.as_ref())
2681 .is_none();
2682 if highlighted_chunk.is_tab {
2683 if non_whitespace_added || !inside_wrapped_string {
2684 invisibles.push(Invisible::Tab {
2685 line_start_offset: line.len(),
2686 });
2687 }
2688 } else {
2689 invisibles.extend(
2690 line_chunk
2691 .chars()
2692 .enumerate()
2693 .filter(|(_, line_char)| {
2694 let is_whitespace = line_char.is_whitespace();
2695 non_whitespace_added |= !is_whitespace;
2696 is_whitespace
2697 && (non_whitespace_added || !inside_wrapped_string)
2698 })
2699 .map(|(whitespace_index, _)| Invisible::Whitespace {
2700 line_offset: line.len() + whitespace_index,
2701 }),
2702 )
2703 }
2704 }
2705
2706 line.push_str(line_chunk);
2707 }
2708 }
2709 }
2710
2711 layouts
2712 }
2713
2714 fn draw(
2715 &self,
2716 layout: &LayoutState,
2717 row: u32,
2718 content_origin: gpui::Point<Pixels>,
2719 whitespace_setting: ShowWhitespaceSetting,
2720 selection_ranges: &[Range<DisplayPoint>],
2721 cx: &mut WindowContext,
2722 ) {
2723 let line_height = layout.position_map.line_height;
2724 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2725
2726 self.line
2727 .paint(
2728 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2729 line_height,
2730 cx,
2731 )
2732 .log_err();
2733
2734 self.draw_invisibles(
2735 &selection_ranges,
2736 layout,
2737 content_origin,
2738 line_y,
2739 row,
2740 line_height,
2741 whitespace_setting,
2742 cx,
2743 );
2744 }
2745
2746 fn draw_invisibles(
2747 &self,
2748 selection_ranges: &[Range<DisplayPoint>],
2749 layout: &LayoutState,
2750 content_origin: gpui::Point<Pixels>,
2751 line_y: Pixels,
2752 row: u32,
2753 line_height: Pixels,
2754 whitespace_setting: ShowWhitespaceSetting,
2755 cx: &mut WindowContext,
2756 ) {
2757 let allowed_invisibles_regions = match whitespace_setting {
2758 ShowWhitespaceSetting::None => return,
2759 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2760 ShowWhitespaceSetting::All => None,
2761 };
2762
2763 for invisible in &self.invisibles {
2764 let (&token_offset, invisible_symbol) = match invisible {
2765 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2766 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2767 };
2768
2769 let x_offset = self.line.x_for_index(token_offset);
2770 let invisible_offset =
2771 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2772 let origin = content_origin
2773 + gpui::point(
2774 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2775 line_y,
2776 );
2777
2778 if let Some(allowed_regions) = allowed_invisibles_regions {
2779 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2780 if !allowed_regions
2781 .iter()
2782 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2783 {
2784 continue;
2785 }
2786 }
2787 invisible_symbol.paint(origin, line_height, cx).log_err();
2788 }
2789 }
2790}
2791
2792#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2793enum Invisible {
2794 Tab { line_start_offset: usize },
2795 Whitespace { line_offset: usize },
2796}
2797
2798impl Element for EditorElement {
2799 type State = ();
2800
2801 fn request_layout(
2802 &mut self,
2803 _element_state: Option<Self::State>,
2804 cx: &mut gpui::WindowContext,
2805 ) -> (gpui::LayoutId, Self::State) {
2806 cx.with_view_id(self.editor.entity_id(), |cx| {
2807 self.editor.update(cx, |editor, cx| {
2808 editor.set_style(self.style.clone(), cx);
2809
2810 let layout_id = match editor.mode {
2811 EditorMode::SingleLine => {
2812 let rem_size = cx.rem_size();
2813 let mut style = Style::default();
2814 style.size.width = relative(1.).into();
2815 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2816 cx.request_layout(&style, None)
2817 }
2818 EditorMode::AutoHeight { max_lines } => {
2819 let editor_handle = cx.view().clone();
2820 let max_line_number_width =
2821 self.max_line_number_width(&editor.snapshot(cx), cx);
2822 cx.request_measured_layout(
2823 Style::default(),
2824 move |known_dimensions, _, cx| {
2825 editor_handle
2826 .update(cx, |editor, cx| {
2827 compute_auto_height_layout(
2828 editor,
2829 max_lines,
2830 max_line_number_width,
2831 known_dimensions,
2832 cx,
2833 )
2834 })
2835 .unwrap_or_default()
2836 },
2837 )
2838 }
2839 EditorMode::Full => {
2840 let mut style = Style::default();
2841 style.size.width = relative(1.).into();
2842 style.size.height = relative(1.).into();
2843 cx.request_layout(&style, None)
2844 }
2845 };
2846
2847 (layout_id, ())
2848 })
2849 })
2850 }
2851
2852 fn paint(
2853 &mut self,
2854 bounds: Bounds<gpui::Pixels>,
2855 _element_state: &mut Self::State,
2856 cx: &mut gpui::WindowContext,
2857 ) {
2858 let editor = self.editor.clone();
2859
2860 cx.paint_view(self.editor.entity_id(), |cx| {
2861 cx.with_text_style(
2862 Some(gpui::TextStyleRefinement {
2863 font_size: Some(self.style.text.font_size),
2864 ..Default::default()
2865 }),
2866 |cx| {
2867 let mut layout = self.compute_layout(bounds, cx);
2868 let gutter_bounds = Bounds {
2869 origin: bounds.origin,
2870 size: layout.gutter_size,
2871 };
2872 let text_bounds = Bounds {
2873 origin: gutter_bounds.upper_right(),
2874 size: layout.text_size,
2875 };
2876
2877 let focus_handle = editor.focus_handle(cx);
2878 let key_context = self.editor.read(cx).key_context(cx);
2879 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2880 self.register_actions(cx);
2881 self.register_key_listeners(cx);
2882
2883 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2884 let input_handler =
2885 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2886 cx.handle_input(&focus_handle, input_handler);
2887
2888 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2889 if layout.gutter_size.width > Pixels::ZERO {
2890 self.paint_gutter(gutter_bounds, &mut layout, cx);
2891 }
2892 self.paint_text(text_bounds, &mut layout, cx);
2893
2894 cx.with_z_index(0, |cx| {
2895 self.paint_mouse_listeners(
2896 bounds,
2897 gutter_bounds,
2898 text_bounds,
2899 &layout,
2900 cx,
2901 );
2902 });
2903 if !layout.blocks.is_empty() {
2904 cx.with_z_index(0, |cx| {
2905 cx.with_element_id(Some("editor_blocks"), |cx| {
2906 self.paint_blocks(bounds, &mut layout, cx);
2907 });
2908 })
2909 }
2910
2911 cx.with_z_index(1, |cx| {
2912 self.paint_overlays(text_bounds, &mut layout, cx);
2913 });
2914
2915 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2916 });
2917 })
2918 },
2919 )
2920 })
2921 }
2922}
2923
2924impl IntoElement for EditorElement {
2925 type Element = Self;
2926
2927 fn element_id(&self) -> Option<gpui::ElementId> {
2928 self.editor.element_id()
2929 }
2930
2931 fn into_element(self) -> Self::Element {
2932 self
2933 }
2934}
2935
2936type BufferRow = u32;
2937
2938pub struct LayoutState {
2939 position_map: Arc<PositionMap>,
2940 gutter_size: Size<Pixels>,
2941 gutter_padding: Pixels,
2942 gutter_margin: Pixels,
2943 text_size: gpui::Size<Pixels>,
2944 mode: EditorMode,
2945 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2946 visible_anchor_range: Range<Anchor>,
2947 visible_display_row_range: Range<u32>,
2948 active_rows: BTreeMap<u32, bool>,
2949 highlighted_rows: Option<Range<u32>>,
2950 line_numbers: Vec<Option<ShapedLine>>,
2951 display_hunks: Vec<DisplayDiffHunk>,
2952 blocks: Vec<BlockLayout>,
2953 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2954 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2955 scrollbar_row_range: Range<f32>,
2956 show_scrollbars: bool,
2957 is_singleton: bool,
2958 max_row: u32,
2959 context_menu: Option<(DisplayPoint, AnyElement)>,
2960 code_actions_indicator: Option<CodeActionsIndicator>,
2961 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2962 fold_indicators: Vec<Option<IconButton>>,
2963 tab_invisible: ShapedLine,
2964 space_invisible: ShapedLine,
2965}
2966
2967struct CodeActionsIndicator {
2968 row: u32,
2969 button: IconButton,
2970}
2971
2972struct PositionMap {
2973 size: Size<Pixels>,
2974 line_height: Pixels,
2975 scroll_position: gpui::Point<Pixels>,
2976 scroll_max: gpui::Point<f32>,
2977 em_width: Pixels,
2978 em_advance: Pixels,
2979 line_layouts: Vec<LineWithInvisibles>,
2980 snapshot: EditorSnapshot,
2981}
2982
2983#[derive(Debug, Copy, Clone)]
2984pub struct PointForPosition {
2985 pub previous_valid: DisplayPoint,
2986 pub next_valid: DisplayPoint,
2987 pub exact_unclipped: DisplayPoint,
2988 pub column_overshoot_after_line_end: u32,
2989}
2990
2991impl PointForPosition {
2992 #[cfg(test)]
2993 pub fn valid(valid: DisplayPoint) -> Self {
2994 Self {
2995 previous_valid: valid,
2996 next_valid: valid,
2997 exact_unclipped: valid,
2998 column_overshoot_after_line_end: 0,
2999 }
3000 }
3001
3002 pub fn as_valid(&self) -> Option<DisplayPoint> {
3003 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
3004 Some(self.previous_valid)
3005 } else {
3006 None
3007 }
3008 }
3009}
3010
3011impl PositionMap {
3012 fn point_for_position(
3013 &self,
3014 text_bounds: Bounds<Pixels>,
3015 position: gpui::Point<Pixels>,
3016 ) -> PointForPosition {
3017 let scroll_position = self.snapshot.scroll_position();
3018 let position = position - text_bounds.origin;
3019 let y = position.y.max(px(0.)).min(self.size.height);
3020 let x = position.x + (scroll_position.x * self.em_width);
3021 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3022
3023 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3024 .line_layouts
3025 .get(row as usize - scroll_position.y as usize)
3026 .map(|&LineWithInvisibles { ref line, .. }| line)
3027 {
3028 if let Some(ix) = line.index_for_x(x) {
3029 (ix as u32, px(0.))
3030 } else {
3031 (line.len as u32, px(0.).max(x - line.width))
3032 }
3033 } else {
3034 (0, x)
3035 };
3036
3037 let mut exact_unclipped = DisplayPoint::new(row, column);
3038 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3039 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3040
3041 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3042 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3043 PointForPosition {
3044 previous_valid,
3045 next_valid,
3046 exact_unclipped,
3047 column_overshoot_after_line_end,
3048 }
3049 }
3050}
3051
3052struct BlockLayout {
3053 row: u32,
3054 element: AnyElement,
3055 available_space: Size<AvailableSpace>,
3056 style: BlockStyle,
3057}
3058
3059fn layout_line(
3060 row: u32,
3061 snapshot: &EditorSnapshot,
3062 style: &EditorStyle,
3063 cx: &WindowContext,
3064) -> Result<ShapedLine> {
3065 let mut line = snapshot.line(row);
3066
3067 if line.len() > MAX_LINE_LEN {
3068 let mut len = MAX_LINE_LEN;
3069 while !line.is_char_boundary(len) {
3070 len -= 1;
3071 }
3072
3073 line.truncate(len);
3074 }
3075
3076 cx.text_system().shape_line(
3077 line.into(),
3078 style.text.font_size.to_pixels(cx.rem_size()),
3079 &[TextRun {
3080 len: snapshot.line_len(row) as usize,
3081 font: style.text.font(),
3082 color: Hsla::default(),
3083 background_color: None,
3084 underline: None,
3085 }],
3086 )
3087}
3088
3089#[derive(Debug)]
3090pub struct Cursor {
3091 origin: gpui::Point<Pixels>,
3092 block_width: Pixels,
3093 line_height: Pixels,
3094 color: Hsla,
3095 shape: CursorShape,
3096 block_text: Option<ShapedLine>,
3097}
3098
3099impl Cursor {
3100 pub fn new(
3101 origin: gpui::Point<Pixels>,
3102 block_width: Pixels,
3103 line_height: Pixels,
3104 color: Hsla,
3105 shape: CursorShape,
3106 block_text: Option<ShapedLine>,
3107 ) -> Cursor {
3108 Cursor {
3109 origin,
3110 block_width,
3111 line_height,
3112 color,
3113 shape,
3114 block_text,
3115 }
3116 }
3117
3118 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3119 Bounds {
3120 origin: self.origin + origin,
3121 size: size(self.block_width, self.line_height),
3122 }
3123 }
3124
3125 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3126 let bounds = match self.shape {
3127 CursorShape::Bar => Bounds {
3128 origin: self.origin + origin,
3129 size: size(px(2.0), self.line_height),
3130 },
3131 CursorShape::Block | CursorShape::Hollow => Bounds {
3132 origin: self.origin + origin,
3133 size: size(self.block_width, self.line_height),
3134 },
3135 CursorShape::Underscore => Bounds {
3136 origin: self.origin
3137 + origin
3138 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3139 size: size(self.block_width, px(2.0)),
3140 },
3141 };
3142
3143 //Draw background or border quad
3144 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3145 outline(bounds, self.color)
3146 } else {
3147 fill(bounds, self.color)
3148 };
3149
3150 cx.paint_quad(cursor);
3151
3152 if let Some(block_text) = &self.block_text {
3153 block_text
3154 .paint(self.origin + origin, self.line_height, cx)
3155 .log_err();
3156 }
3157 }
3158
3159 pub fn shape(&self) -> CursorShape {
3160 self.shape
3161 }
3162}
3163
3164#[derive(Debug)]
3165pub struct HighlightedRange {
3166 pub start_y: Pixels,
3167 pub line_height: Pixels,
3168 pub lines: Vec<HighlightedRangeLine>,
3169 pub color: Hsla,
3170 pub corner_radius: Pixels,
3171}
3172
3173#[derive(Debug)]
3174pub struct HighlightedRangeLine {
3175 pub start_x: Pixels,
3176 pub end_x: Pixels,
3177}
3178
3179impl HighlightedRange {
3180 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3181 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3182 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3183 self.paint_lines(
3184 self.start_y + self.line_height,
3185 &self.lines[1..],
3186 bounds,
3187 cx,
3188 );
3189 } else {
3190 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3191 }
3192 }
3193
3194 fn paint_lines(
3195 &self,
3196 start_y: Pixels,
3197 lines: &[HighlightedRangeLine],
3198 _bounds: Bounds<Pixels>,
3199 cx: &mut WindowContext,
3200 ) {
3201 if lines.is_empty() {
3202 return;
3203 }
3204
3205 let first_line = lines.first().unwrap();
3206 let last_line = lines.last().unwrap();
3207
3208 let first_top_left = point(first_line.start_x, start_y);
3209 let first_top_right = point(first_line.end_x, start_y);
3210
3211 let curve_height = point(Pixels::ZERO, self.corner_radius);
3212 let curve_width = |start_x: Pixels, end_x: Pixels| {
3213 let max = (end_x - start_x) / 2.;
3214 let width = if max < self.corner_radius {
3215 max
3216 } else {
3217 self.corner_radius
3218 };
3219
3220 point(width, Pixels::ZERO)
3221 };
3222
3223 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3224 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3225 path.curve_to(first_top_right + curve_height, first_top_right);
3226
3227 let mut iter = lines.iter().enumerate().peekable();
3228 while let Some((ix, line)) = iter.next() {
3229 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3230
3231 if let Some((_, next_line)) = iter.peek() {
3232 let next_top_right = point(next_line.end_x, bottom_right.y);
3233
3234 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3235 Ordering::Equal => {
3236 path.line_to(bottom_right);
3237 }
3238 Ordering::Less => {
3239 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3240 path.line_to(bottom_right - curve_height);
3241 if self.corner_radius > Pixels::ZERO {
3242 path.curve_to(bottom_right - curve_width, bottom_right);
3243 }
3244 path.line_to(next_top_right + curve_width);
3245 if self.corner_radius > Pixels::ZERO {
3246 path.curve_to(next_top_right + curve_height, next_top_right);
3247 }
3248 }
3249 Ordering::Greater => {
3250 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3251 path.line_to(bottom_right - curve_height);
3252 if self.corner_radius > Pixels::ZERO {
3253 path.curve_to(bottom_right + curve_width, bottom_right);
3254 }
3255 path.line_to(next_top_right - curve_width);
3256 if self.corner_radius > Pixels::ZERO {
3257 path.curve_to(next_top_right + curve_height, next_top_right);
3258 }
3259 }
3260 }
3261 } else {
3262 let curve_width = curve_width(line.start_x, line.end_x);
3263 path.line_to(bottom_right - curve_height);
3264 if self.corner_radius > Pixels::ZERO {
3265 path.curve_to(bottom_right - curve_width, bottom_right);
3266 }
3267
3268 let bottom_left = point(line.start_x, bottom_right.y);
3269 path.line_to(bottom_left + curve_width);
3270 if self.corner_radius > Pixels::ZERO {
3271 path.curve_to(bottom_left - curve_height, bottom_left);
3272 }
3273 }
3274 }
3275
3276 if first_line.start_x > last_line.start_x {
3277 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3278 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3279 path.line_to(second_top_left + curve_height);
3280 if self.corner_radius > Pixels::ZERO {
3281 path.curve_to(second_top_left + curve_width, second_top_left);
3282 }
3283 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3284 path.line_to(first_bottom_left - curve_width);
3285 if self.corner_radius > Pixels::ZERO {
3286 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3287 }
3288 }
3289
3290 path.line_to(first_top_left + curve_height);
3291 if self.corner_radius > Pixels::ZERO {
3292 path.curve_to(first_top_left + top_curve_width, first_top_left);
3293 }
3294 path.line_to(first_top_right - top_curve_width);
3295
3296 cx.paint_path(path, self.color);
3297 }
3298}
3299
3300pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3301 (delta.pow(1.5) / 100.0).into()
3302}
3303
3304fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3305 (delta.pow(1.2) / 300.0).into()
3306}
3307
3308#[cfg(test)]
3309mod tests {
3310 use super::*;
3311 use crate::{
3312 display_map::{BlockDisposition, BlockProperties},
3313 editor_tests::{init_test, update_test_language_settings},
3314 Editor, MultiBuffer,
3315 };
3316 use gpui::TestAppContext;
3317 use language::language_settings;
3318 use log::info;
3319 use std::{num::NonZeroU32, sync::Arc};
3320 use util::test::sample_text;
3321
3322 #[gpui::test]
3323 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3324 init_test(cx, |_| {});
3325 let window = cx.add_window(|cx| {
3326 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3327 Editor::new(EditorMode::Full, buffer, None, cx)
3328 });
3329
3330 let editor = window.root(cx).unwrap();
3331 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3332 let element = EditorElement::new(&editor, style);
3333
3334 let layouts = window
3335 .update(cx, |editor, cx| {
3336 let snapshot = editor.snapshot(cx);
3337 element
3338 .shape_line_numbers(
3339 0..6,
3340 &Default::default(),
3341 DisplayPoint::new(0, 0),
3342 false,
3343 &snapshot,
3344 cx,
3345 )
3346 .0
3347 })
3348 .unwrap();
3349 assert_eq!(layouts.len(), 6);
3350
3351 let relative_rows = window
3352 .update(cx, |editor, cx| {
3353 let snapshot = editor.snapshot(cx);
3354 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3355 })
3356 .unwrap();
3357 assert_eq!(relative_rows[&0], 3);
3358 assert_eq!(relative_rows[&1], 2);
3359 assert_eq!(relative_rows[&2], 1);
3360 // current line has no relative number
3361 assert_eq!(relative_rows[&4], 1);
3362 assert_eq!(relative_rows[&5], 2);
3363
3364 // works if cursor is before screen
3365 let relative_rows = window
3366 .update(cx, |editor, cx| {
3367 let snapshot = editor.snapshot(cx);
3368
3369 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3370 })
3371 .unwrap();
3372 assert_eq!(relative_rows.len(), 3);
3373 assert_eq!(relative_rows[&3], 2);
3374 assert_eq!(relative_rows[&4], 3);
3375 assert_eq!(relative_rows[&5], 4);
3376
3377 // works if cursor is after screen
3378 let relative_rows = window
3379 .update(cx, |editor, cx| {
3380 let snapshot = editor.snapshot(cx);
3381
3382 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3383 })
3384 .unwrap();
3385 assert_eq!(relative_rows.len(), 3);
3386 assert_eq!(relative_rows[&0], 5);
3387 assert_eq!(relative_rows[&1], 4);
3388 assert_eq!(relative_rows[&2], 3);
3389 }
3390
3391 #[gpui::test]
3392 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3393 init_test(cx, |_| {});
3394
3395 let window = cx.add_window(|cx| {
3396 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3397 Editor::new(EditorMode::Full, buffer, None, cx)
3398 });
3399 let editor = window.root(cx).unwrap();
3400 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3401 let mut element = EditorElement::new(&editor, style);
3402
3403 window
3404 .update(cx, |editor, cx| {
3405 editor.cursor_shape = CursorShape::Block;
3406 editor.change_selections(None, cx, |s| {
3407 s.select_ranges([
3408 Point::new(0, 0)..Point::new(1, 0),
3409 Point::new(3, 2)..Point::new(3, 3),
3410 Point::new(5, 6)..Point::new(6, 0),
3411 ]);
3412 });
3413 })
3414 .unwrap();
3415 let state = cx
3416 .update_window(window.into(), |view, cx| {
3417 cx.with_view_id(view.entity_id(), |cx| {
3418 element.compute_layout(
3419 Bounds {
3420 origin: point(px(500.), px(500.)),
3421 size: size(px(500.), px(500.)),
3422 },
3423 cx,
3424 )
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(), |view, cx| {
3511 cx.with_view_id(view.entity_id(), |cx| {
3512 element.compute_layout(
3513 Bounds {
3514 origin: point(px(500.), px(500.)),
3515 size: size(px(500.), px(500.)),
3516 },
3517 cx,
3518 )
3519 })
3520 })
3521 .unwrap();
3522 assert_eq!(state.selections.len(), 1);
3523 let local_selections = &state.selections[0].1;
3524 assert_eq!(local_selections.len(), 2);
3525
3526 // moves cursor on excerpt boundary back a line
3527 // and doesn't allow selection to bleed through
3528 assert_eq!(
3529 local_selections[0].range,
3530 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3531 );
3532 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3533 // moves cursor on buffer boundary back two lines
3534 // and doesn't allow selection to bleed through
3535 assert_eq!(
3536 local_selections[1].range,
3537 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3538 );
3539 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3540 }
3541
3542 #[gpui::test]
3543 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3544 init_test(cx, |_| {});
3545
3546 let window = cx.add_window(|cx| {
3547 let buffer = MultiBuffer::build_simple("", cx);
3548 Editor::new(EditorMode::Full, buffer, None, cx)
3549 });
3550 let editor = window.root(cx).unwrap();
3551 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3552 window
3553 .update(cx, |editor, cx| {
3554 editor.set_placeholder_text("hello", cx);
3555 editor.insert_blocks(
3556 [BlockProperties {
3557 style: BlockStyle::Fixed,
3558 disposition: BlockDisposition::Above,
3559 height: 3,
3560 position: Anchor::min(),
3561 render: Arc::new(|_| div().into_any()),
3562 }],
3563 None,
3564 cx,
3565 );
3566
3567 // Blur the editor so that it displays placeholder text.
3568 cx.blur();
3569 })
3570 .unwrap();
3571
3572 let mut element = EditorElement::new(&editor, style);
3573 let state = cx
3574 .update_window(window.into(), |view, cx| {
3575 cx.with_view_id(view.entity_id(), |cx| {
3576 element.compute_layout(
3577 Bounds {
3578 origin: point(px(500.), px(500.)),
3579 size: size(px(500.), px(500.)),
3580 },
3581 cx,
3582 )
3583 })
3584 })
3585 .unwrap();
3586 let size = state.position_map.size;
3587
3588 assert_eq!(state.position_map.line_layouts.len(), 4);
3589 assert_eq!(
3590 state
3591 .line_numbers
3592 .iter()
3593 .map(Option::is_some)
3594 .collect::<Vec<_>>(),
3595 &[false, false, false, true]
3596 );
3597
3598 // Don't panic.
3599 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3600 cx.update_window(window.into(), |_, cx| element.paint(bounds, &mut (), cx))
3601 .unwrap()
3602 }
3603
3604 #[gpui::test]
3605 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3606 const TAB_SIZE: u32 = 4;
3607
3608 let input_text = "\t \t|\t| a b";
3609 let expected_invisibles = vec![
3610 Invisible::Tab {
3611 line_start_offset: 0,
3612 },
3613 Invisible::Whitespace {
3614 line_offset: TAB_SIZE as usize,
3615 },
3616 Invisible::Tab {
3617 line_start_offset: TAB_SIZE as usize + 1,
3618 },
3619 Invisible::Tab {
3620 line_start_offset: TAB_SIZE as usize * 2 + 1,
3621 },
3622 Invisible::Whitespace {
3623 line_offset: TAB_SIZE as usize * 3 + 1,
3624 },
3625 Invisible::Whitespace {
3626 line_offset: TAB_SIZE as usize * 3 + 3,
3627 },
3628 ];
3629 assert_eq!(
3630 expected_invisibles.len(),
3631 input_text
3632 .chars()
3633 .filter(|initial_char| initial_char.is_whitespace())
3634 .count(),
3635 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3636 );
3637
3638 init_test(cx, |s| {
3639 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3640 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3641 });
3642
3643 let actual_invisibles =
3644 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3645
3646 assert_eq!(expected_invisibles, actual_invisibles);
3647 }
3648
3649 #[gpui::test]
3650 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3651 init_test(cx, |s| {
3652 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3653 s.defaults.tab_size = NonZeroU32::new(4);
3654 });
3655
3656 for editor_mode_without_invisibles in [
3657 EditorMode::SingleLine,
3658 EditorMode::AutoHeight { max_lines: 100 },
3659 ] {
3660 let invisibles = collect_invisibles_from_new_editor(
3661 cx,
3662 editor_mode_without_invisibles,
3663 "\t\t\t| | a b",
3664 px(500.0),
3665 );
3666 assert!(invisibles.is_empty(),
3667 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3668 }
3669 }
3670
3671 #[gpui::test]
3672 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3673 let tab_size = 4;
3674 let input_text = "a\tbcd ".repeat(9);
3675 let repeated_invisibles = [
3676 Invisible::Tab {
3677 line_start_offset: 1,
3678 },
3679 Invisible::Whitespace {
3680 line_offset: tab_size as usize + 3,
3681 },
3682 Invisible::Whitespace {
3683 line_offset: tab_size as usize + 4,
3684 },
3685 Invisible::Whitespace {
3686 line_offset: tab_size as usize + 5,
3687 },
3688 ];
3689 let expected_invisibles = std::iter::once(repeated_invisibles)
3690 .cycle()
3691 .take(9)
3692 .flatten()
3693 .collect::<Vec<_>>();
3694 assert_eq!(
3695 expected_invisibles.len(),
3696 input_text
3697 .chars()
3698 .filter(|initial_char| initial_char.is_whitespace())
3699 .count(),
3700 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3701 );
3702 info!("Expected invisibles: {expected_invisibles:?}");
3703
3704 init_test(cx, |_| {});
3705
3706 // Put the same string with repeating whitespace pattern into editors of various size,
3707 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3708 let resize_step = 10.0;
3709 let mut editor_width = 200.0;
3710 while editor_width <= 1000.0 {
3711 update_test_language_settings(cx, |s| {
3712 s.defaults.tab_size = NonZeroU32::new(tab_size);
3713 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3714 s.defaults.preferred_line_length = Some(editor_width as u32);
3715 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3716 });
3717
3718 let actual_invisibles = collect_invisibles_from_new_editor(
3719 cx,
3720 EditorMode::Full,
3721 &input_text,
3722 px(editor_width),
3723 );
3724
3725 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3726 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3727 let mut i = 0;
3728 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3729 i = actual_index;
3730 match expected_invisibles.get(i) {
3731 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3732 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3733 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3734 _ => {
3735 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3736 }
3737 },
3738 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3739 }
3740 }
3741 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3742 assert!(
3743 missing_expected_invisibles.is_empty(),
3744 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3745 );
3746
3747 editor_width += resize_step;
3748 }
3749 }
3750
3751 fn collect_invisibles_from_new_editor(
3752 cx: &mut TestAppContext,
3753 editor_mode: EditorMode,
3754 input_text: &str,
3755 editor_width: Pixels,
3756 ) -> Vec<Invisible> {
3757 info!(
3758 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3759 editor_width.0
3760 );
3761 let window = cx.add_window(|cx| {
3762 let buffer = MultiBuffer::build_simple(&input_text, cx);
3763 Editor::new(editor_mode, buffer, None, cx)
3764 });
3765 let editor = window.root(cx).unwrap();
3766 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3767 let mut element = EditorElement::new(&editor, style);
3768 window
3769 .update(cx, |editor, cx| {
3770 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3771 editor.set_wrap_width(Some(editor_width), cx);
3772 })
3773 .unwrap();
3774 let layout_state = cx
3775 .update_window(window.into(), |_, cx| {
3776 element.compute_layout(
3777 Bounds {
3778 origin: point(px(500.), px(500.)),
3779 size: size(px(500.), px(500.)),
3780 },
3781 cx,
3782 )
3783 })
3784 .unwrap();
3785
3786 layout_state
3787 .position_map
3788 .line_layouts
3789 .iter()
3790 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3791 .flatten()
3792 .cloned()
3793 .collect()
3794 }
3795}
3796
3797pub fn register_action<T: Action>(
3798 view: &View<Editor>,
3799 cx: &mut WindowContext,
3800 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3801) {
3802 let view = view.clone();
3803 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3804 let action = action.downcast_ref().unwrap();
3805 if phase == DispatchPhase::Bubble {
3806 view.update(cx, |editor, cx| {
3807 listener(editor, action, cx);
3808 })
3809 }
3810 })
3811}
3812
3813fn compute_auto_height_layout(
3814 editor: &mut Editor,
3815 max_lines: usize,
3816 max_line_number_width: Pixels,
3817 known_dimensions: Size<Option<Pixels>>,
3818 cx: &mut ViewContext<Editor>,
3819) -> Option<Size<Pixels>> {
3820 let width = known_dimensions.width?;
3821 if let Some(height) = known_dimensions.height {
3822 return Some(size(width, height));
3823 }
3824
3825 let style = editor.style.as_ref().unwrap();
3826 let font_id = cx.text_system().resolve_font(&style.text.font());
3827 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3828 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3829 let em_width = cx
3830 .text_system()
3831 .typographic_bounds(font_id, font_size, 'm')
3832 .unwrap()
3833 .size
3834 .width;
3835
3836 let mut snapshot = editor.snapshot(cx);
3837 let gutter_width;
3838 let gutter_margin;
3839 if snapshot.show_gutter {
3840 let descent = cx.text_system().descent(font_id, font_size);
3841 let gutter_padding_factor = 3.5;
3842 let gutter_padding = (em_width * gutter_padding_factor).round();
3843 gutter_width = max_line_number_width + gutter_padding * 2.0;
3844 gutter_margin = -descent;
3845 } else {
3846 gutter_width = Pixels::ZERO;
3847 gutter_margin = Pixels::ZERO;
3848 };
3849
3850 editor.gutter_width = gutter_width;
3851 let text_width = width - gutter_width;
3852 let overscroll = size(em_width, px(0.));
3853
3854 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3855 if editor.set_wrap_width(Some(editor_width), cx) {
3856 snapshot = editor.snapshot(cx);
3857 }
3858
3859 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3860 let height = scroll_height
3861 .max(line_height)
3862 .min(line_height * max_lines as f32);
3863
3864 Some(size(width, height))
3865}