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