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 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
882 let fold_range = fold.range.clone();
883 let display_range = fold.range.start.to_display_point(&snapshot)
884 ..fold.range.end.to_display_point(&snapshot);
885 debug_assert_eq!(display_range.start.row(), display_range.end.row());
886 let row = display_range.start.row();
887
888 let line_layout = &layout.position_map.line_layouts
889 [(row - layout.visible_display_row_range.start) as usize]
890 .line;
891 let start_x = content_origin.x
892 + line_layout.x_for_index(display_range.start.column() as usize)
893 - layout.position_map.scroll_position.x;
894 let start_y = content_origin.y
895 + row as f32 * layout.position_map.line_height
896 - layout.position_map.scroll_position.y;
897 let end_x = content_origin.x
898 + line_layout.x_for_index(display_range.end.column() as usize)
899 - layout.position_map.scroll_position.x;
900
901 let fold_bounds = Bounds {
902 origin: point(start_x, start_y),
903 size: size(end_x - start_x, layout.position_map.line_height),
904 };
905
906 let fold_background = cx.with_z_index(1, |cx| {
907 div()
908 .id(fold.id)
909 .size_full()
910 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
911 .on_click(cx.listener_for(
912 &self.editor,
913 move |editor: &mut Editor, _, cx| {
914 editor.unfold_ranges(
915 [fold_range.start..fold_range.end],
916 true,
917 false,
918 cx,
919 );
920 cx.stop_propagation();
921 },
922 ))
923 .draw_and_update_state(
924 fold_bounds.origin,
925 fold_bounds.size,
926 cx,
927 |fold_element_state, cx| {
928 if fold_element_state.is_active() {
929 cx.theme().colors().ghost_element_active
930 } else if fold_bounds.contains(&cx.mouse_position()) {
931 cx.theme().colors().ghost_element_hover
932 } else {
933 cx.theme().colors().ghost_element_background
934 }
935 },
936 )
937 });
938
939 self.paint_highlighted_range(
940 display_range.clone(),
941 fold_background,
942 fold_corner_radius,
943 fold_corner_radius * 2.,
944 layout,
945 content_origin,
946 text_bounds,
947 cx,
948 );
949 }
950 });
951
952 for (range, color) in &layout.highlighted_ranges {
953 self.paint_highlighted_range(
954 range.clone(),
955 *color,
956 Pixels::ZERO,
957 line_end_overshoot,
958 layout,
959 content_origin,
960 text_bounds,
961 cx,
962 );
963 }
964
965 let mut cursors = SmallVec::<[Cursor; 32]>::new();
966 let corner_radius = 0.15 * layout.position_map.line_height;
967 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
968
969 for (selection_style, selections) in &layout.selections {
970 for selection in selections {
971 self.paint_highlighted_range(
972 selection.range.clone(),
973 selection_style.selection,
974 corner_radius,
975 corner_radius * 2.,
976 layout,
977 content_origin,
978 text_bounds,
979 cx,
980 );
981
982 if selection.is_local && !selection.range.is_empty() {
983 invisible_display_ranges.push(selection.range.clone());
984 }
985
986 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
987 let cursor_position = selection.head;
988 if layout
989 .visible_display_row_range
990 .contains(&cursor_position.row())
991 {
992 let cursor_row_layout = &layout.position_map.line_layouts
993 [(cursor_position.row() - start_row) as usize]
994 .line;
995 let cursor_column = cursor_position.column() as usize;
996
997 let cursor_character_x =
998 cursor_row_layout.x_for_index(cursor_column);
999 let mut block_width = cursor_row_layout
1000 .x_for_index(cursor_column + 1)
1001 - cursor_character_x;
1002 if block_width == Pixels::ZERO {
1003 block_width = layout.position_map.em_width;
1004 }
1005 let block_text = if let CursorShape::Block = selection.cursor_shape
1006 {
1007 layout
1008 .position_map
1009 .snapshot
1010 .chars_at(cursor_position)
1011 .next()
1012 .and_then(|(character, _)| {
1013 // todo!() currently shape_line panics if text conatins newlines
1014 let text = if character == '\n' {
1015 SharedString::from(" ")
1016 } else {
1017 SharedString::from(character.to_string())
1018 };
1019 let len = text.len();
1020 cx.text_system()
1021 .shape_line(
1022 text,
1023 cursor_row_layout.font_size,
1024 &[TextRun {
1025 len,
1026 font: self.style.text.font(),
1027 color: self.style.background,
1028 background_color: None,
1029 underline: None,
1030 }],
1031 )
1032 .log_err()
1033 })
1034 } else {
1035 None
1036 };
1037
1038 let x = cursor_character_x - layout.position_map.scroll_position.x;
1039 let y = cursor_position.row() as f32
1040 * layout.position_map.line_height
1041 - layout.position_map.scroll_position.y;
1042 if selection.is_newest {
1043 self.editor.update(cx, |editor, _| {
1044 editor.pixel_position_of_newest_cursor = Some(point(
1045 text_bounds.origin.x + x + block_width / 2.,
1046 text_bounds.origin.y
1047 + y
1048 + layout.position_map.line_height / 2.,
1049 ))
1050 });
1051 }
1052 cursors.push(Cursor {
1053 color: selection_style.cursor,
1054 block_width,
1055 origin: point(x, y),
1056 line_height: layout.position_map.line_height,
1057 shape: selection.cursor_shape,
1058 block_text,
1059 });
1060 }
1061 }
1062 }
1063 }
1064
1065 for (ix, line_with_invisibles) in
1066 layout.position_map.line_layouts.iter().enumerate()
1067 {
1068 let row = start_row + ix as u32;
1069 line_with_invisibles.draw(
1070 layout,
1071 row,
1072 content_origin,
1073 whitespace_setting,
1074 &invisible_display_ranges,
1075 cx,
1076 )
1077 }
1078
1079 cx.with_z_index(0, |cx| {
1080 for cursor in cursors {
1081 cursor.paint(content_origin, cx);
1082 }
1083 });
1084 },
1085 )
1086 }
1087
1088 fn paint_overlays(
1089 &mut self,
1090 text_bounds: Bounds<Pixels>,
1091 layout: &mut LayoutState,
1092 cx: &mut WindowContext,
1093 ) {
1094 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1095 let start_row = layout.visible_display_row_range.start;
1096 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1097 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1098 let context_menu_size = context_menu.measure(available_space, cx);
1099
1100 let cursor_row_layout =
1101 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1102 let x = cursor_row_layout.x_for_index(position.column() as usize)
1103 - layout.position_map.scroll_position.x;
1104 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1105 - layout.position_map.scroll_position.y;
1106 let mut list_origin = content_origin + point(x, y);
1107 let list_width = context_menu_size.width;
1108 let list_height = context_menu_size.height;
1109
1110 // Snap the right edge of the list to the right edge of the window if
1111 // its horizontal bounds overflow.
1112 if list_origin.x + list_width > cx.viewport_size().width {
1113 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1114 }
1115
1116 if list_origin.y + list_height > text_bounds.lower_right().y {
1117 list_origin.y -= layout.position_map.line_height + list_height;
1118 }
1119
1120 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1121 }
1122
1123 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1124 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1125
1126 // This is safe because we check on layout whether the required row is available
1127 let hovered_row_layout =
1128 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1129
1130 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1131 // height. This is the size we will use to decide whether to render popovers above or below
1132 // the hovered line.
1133 let first_size = hover_popovers[0].measure(available_space, cx);
1134 let height_to_reserve =
1135 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1136
1137 // Compute Hovered Point
1138 let x = hovered_row_layout.x_for_index(position.column() as usize)
1139 - layout.position_map.scroll_position.x;
1140 let y = position.row() as f32 * layout.position_map.line_height
1141 - layout.position_map.scroll_position.y;
1142 let hovered_point = content_origin + point(x, y);
1143
1144 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1145 // There is enough space above. Render popovers above the hovered point
1146 let mut current_y = hovered_point.y;
1147 for mut hover_popover in hover_popovers {
1148 let size = hover_popover.measure(available_space, cx);
1149 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1150
1151 let x_out_of_bounds =
1152 text_bounds.upper_right().x - (popover_origin.x + size.width);
1153 if x_out_of_bounds < Pixels::ZERO {
1154 popover_origin.x = popover_origin.x + x_out_of_bounds;
1155 }
1156
1157 cx.break_content_mask(|cx| {
1158 hover_popover.draw(popover_origin, available_space, cx)
1159 });
1160
1161 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1162 }
1163 } else {
1164 // There is not enough space above. Render popovers below the hovered point
1165 let mut current_y = hovered_point.y + layout.position_map.line_height;
1166 for mut hover_popover in hover_popovers {
1167 let size = hover_popover.measure(available_space, cx);
1168 let mut popover_origin = point(hovered_point.x, current_y);
1169
1170 let x_out_of_bounds =
1171 text_bounds.upper_right().x - (popover_origin.x + size.width);
1172 if x_out_of_bounds < Pixels::ZERO {
1173 popover_origin.x = popover_origin.x + x_out_of_bounds;
1174 }
1175
1176 hover_popover.draw(popover_origin, available_space, cx);
1177
1178 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1179 }
1180 }
1181 }
1182
1183 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1184 let element = overlay()
1185 .position(mouse_context_menu.position)
1186 .child(mouse_context_menu.context_menu.clone())
1187 .anchor(AnchorCorner::TopLeft)
1188 .snap_to_window();
1189 element.into_any().draw(
1190 gpui::Point::default(),
1191 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1192 cx,
1193 );
1194 }
1195 }
1196
1197 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1198 bounds.upper_right().x - self.style.scrollbar_width
1199 }
1200
1201 fn paint_scrollbar(
1202 &mut self,
1203 bounds: Bounds<Pixels>,
1204 layout: &mut LayoutState,
1205 cx: &mut WindowContext,
1206 ) {
1207 if layout.mode != EditorMode::Full {
1208 return;
1209 }
1210
1211 // If a drag took place after we started dragging the scrollbar,
1212 // cancel the scrollbar drag.
1213 if cx.has_active_drag() {
1214 self.editor.update(cx, |editor, cx| {
1215 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1216 });
1217 }
1218
1219 let top = bounds.origin.y;
1220 let bottom = bounds.lower_left().y;
1221 let right = bounds.lower_right().x;
1222 let left = self.scrollbar_left(&bounds);
1223 let row_range = layout.scrollbar_row_range.clone();
1224 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1225
1226 let mut height = bounds.size.height;
1227 let mut first_row_y_offset = px(0.0);
1228
1229 // Impose a minimum height on the scrollbar thumb
1230 let row_height = height / max_row;
1231 let min_thumb_height = layout.position_map.line_height;
1232 let thumb_height = (row_range.end - row_range.start) * row_height;
1233 if thumb_height < min_thumb_height {
1234 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1235 height -= min_thumb_height - thumb_height;
1236 }
1237
1238 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1239
1240 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1241 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1242 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1243 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1244
1245 if layout.show_scrollbars {
1246 cx.paint_quad(quad(
1247 track_bounds,
1248 Corners::default(),
1249 cx.theme().colors().scrollbar_track_background,
1250 Edges {
1251 top: Pixels::ZERO,
1252 right: Pixels::ZERO,
1253 bottom: Pixels::ZERO,
1254 left: px(1.),
1255 },
1256 cx.theme().colors().scrollbar_track_border,
1257 ));
1258 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1259 if layout.is_singleton && scrollbar_settings.selections {
1260 let start_anchor = Anchor::min();
1261 let end_anchor = Anchor::max();
1262 let background_ranges = self
1263 .editor
1264 .read(cx)
1265 .background_highlight_row_ranges::<BufferSearchHighlights>(
1266 start_anchor..end_anchor,
1267 &layout.position_map.snapshot,
1268 50000,
1269 );
1270 for range in background_ranges {
1271 let start_y = y_for_row(range.start().row() as f32);
1272 let mut end_y = y_for_row(range.end().row() as f32);
1273 if end_y - start_y < px(1.) {
1274 end_y = start_y + px(1.);
1275 }
1276 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1277 cx.paint_quad(quad(
1278 bounds,
1279 Corners::default(),
1280 cx.theme().status().info,
1281 Edges {
1282 top: Pixels::ZERO,
1283 right: px(1.),
1284 bottom: Pixels::ZERO,
1285 left: px(1.),
1286 },
1287 cx.theme().colors().scrollbar_thumb_border,
1288 ));
1289 }
1290 }
1291
1292 if layout.is_singleton && scrollbar_settings.git_diff {
1293 for hunk in layout
1294 .position_map
1295 .snapshot
1296 .buffer_snapshot
1297 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1298 {
1299 let start_display = Point::new(hunk.buffer_range.start, 0)
1300 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1301 let end_display = Point::new(hunk.buffer_range.end, 0)
1302 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1303 let start_y = y_for_row(start_display.row() as f32);
1304 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1305 y_for_row((end_display.row() + 1) as f32)
1306 } else {
1307 y_for_row((end_display.row()) as f32)
1308 };
1309
1310 if end_y - start_y < px(1.) {
1311 end_y = start_y + px(1.);
1312 }
1313 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1314
1315 let color = match hunk.status() {
1316 DiffHunkStatus::Added => cx.theme().status().created,
1317 DiffHunkStatus::Modified => cx.theme().status().modified,
1318 DiffHunkStatus::Removed => cx.theme().status().deleted,
1319 };
1320 cx.paint_quad(quad(
1321 bounds,
1322 Corners::default(),
1323 color,
1324 Edges {
1325 top: Pixels::ZERO,
1326 right: px(1.),
1327 bottom: Pixels::ZERO,
1328 left: px(1.),
1329 },
1330 cx.theme().colors().scrollbar_thumb_border,
1331 ));
1332 }
1333 }
1334
1335 cx.paint_quad(quad(
1336 thumb_bounds,
1337 Corners::default(),
1338 cx.theme().colors().scrollbar_thumb_background,
1339 Edges {
1340 top: Pixels::ZERO,
1341 right: px(1.),
1342 bottom: Pixels::ZERO,
1343 left: px(1.),
1344 },
1345 cx.theme().colors().scrollbar_thumb_border,
1346 ));
1347 }
1348
1349 let interactive_track_bounds = InteractiveBounds {
1350 bounds: track_bounds,
1351 stacking_order: cx.stacking_order().clone(),
1352 };
1353 let mut mouse_position = cx.mouse_position();
1354 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1355 cx.set_cursor_style(CursorStyle::Arrow);
1356 }
1357
1358 cx.on_mouse_event({
1359 let editor = self.editor.clone();
1360 move |event: &MouseMoveEvent, phase, cx| {
1361 if phase == DispatchPhase::Capture {
1362 return;
1363 }
1364
1365 editor.update(cx, |editor, cx| {
1366 if event.pressed_button == Some(MouseButton::Left)
1367 && editor.scroll_manager.is_dragging_scrollbar()
1368 {
1369 let y = mouse_position.y;
1370 let new_y = event.position.y;
1371 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1372 let mut position = editor.scroll_position(cx);
1373 position.y += (new_y - y) * (max_row as f32) / height;
1374 if position.y < 0.0 {
1375 position.y = 0.0;
1376 }
1377 editor.set_scroll_position(position, cx);
1378 }
1379
1380 mouse_position = event.position;
1381 cx.stop_propagation();
1382 } else {
1383 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1384 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1385 editor.scroll_manager.show_scrollbar(cx);
1386 }
1387 }
1388 })
1389 }
1390 });
1391
1392 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1393 cx.on_mouse_event({
1394 let editor = self.editor.clone();
1395 move |_: &MouseUpEvent, phase, cx| {
1396 if phase == DispatchPhase::Capture {
1397 return;
1398 }
1399
1400 editor.update(cx, |editor, cx| {
1401 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1402 cx.stop_propagation();
1403 });
1404 }
1405 });
1406 } else {
1407 cx.on_mouse_event({
1408 let editor = self.editor.clone();
1409 move |event: &MouseDownEvent, phase, cx| {
1410 if phase == DispatchPhase::Capture {
1411 return;
1412 }
1413
1414 editor.update(cx, |editor, cx| {
1415 if track_bounds.contains(&event.position) {
1416 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1417
1418 let y = event.position.y;
1419 if y < thumb_top || thumb_bottom < y {
1420 let center_row =
1421 ((y - top) * max_row as f32 / height).round() as u32;
1422 let top_row = center_row
1423 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1424 let mut position = editor.scroll_position(cx);
1425 position.y = top_row as f32;
1426 editor.set_scroll_position(position, cx);
1427 } else {
1428 editor.scroll_manager.show_scrollbar(cx);
1429 }
1430
1431 cx.stop_propagation();
1432 }
1433 });
1434 }
1435 });
1436 }
1437 }
1438
1439 #[allow(clippy::too_many_arguments)]
1440 fn paint_highlighted_range(
1441 &self,
1442 range: Range<DisplayPoint>,
1443 color: Hsla,
1444 corner_radius: Pixels,
1445 line_end_overshoot: Pixels,
1446 layout: &LayoutState,
1447 content_origin: gpui::Point<Pixels>,
1448 bounds: Bounds<Pixels>,
1449 cx: &mut WindowContext,
1450 ) {
1451 let start_row = layout.visible_display_row_range.start;
1452 let end_row = layout.visible_display_row_range.end;
1453 if range.start != range.end {
1454 let row_range = if range.end.column() == 0 {
1455 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1456 } else {
1457 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1458 };
1459
1460 let highlighted_range = HighlightedRange {
1461 color,
1462 line_height: layout.position_map.line_height,
1463 corner_radius,
1464 start_y: content_origin.y
1465 + row_range.start as f32 * layout.position_map.line_height
1466 - layout.position_map.scroll_position.y,
1467 lines: row_range
1468 .into_iter()
1469 .map(|row| {
1470 let line_layout =
1471 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1472 HighlightedRangeLine {
1473 start_x: if row == range.start.row() {
1474 content_origin.x
1475 + line_layout.x_for_index(range.start.column() as usize)
1476 - layout.position_map.scroll_position.x
1477 } else {
1478 content_origin.x - layout.position_map.scroll_position.x
1479 },
1480 end_x: if row == range.end.row() {
1481 content_origin.x
1482 + line_layout.x_for_index(range.end.column() as usize)
1483 - layout.position_map.scroll_position.x
1484 } else {
1485 content_origin.x + line_layout.width + line_end_overshoot
1486 - layout.position_map.scroll_position.x
1487 },
1488 }
1489 })
1490 .collect(),
1491 };
1492
1493 highlighted_range.paint(bounds, cx);
1494 }
1495 }
1496
1497 fn paint_blocks(
1498 &mut self,
1499 bounds: Bounds<Pixels>,
1500 layout: &mut LayoutState,
1501 cx: &mut WindowContext,
1502 ) {
1503 let scroll_position = layout.position_map.snapshot.scroll_position();
1504 let scroll_left = scroll_position.x * layout.position_map.em_width;
1505 let scroll_top = scroll_position.y * layout.position_map.line_height;
1506
1507 for mut block in layout.blocks.drain(..) {
1508 let mut origin = bounds.origin
1509 + point(
1510 Pixels::ZERO,
1511 block.row as f32 * layout.position_map.line_height - scroll_top,
1512 );
1513 if !matches!(block.style, BlockStyle::Sticky) {
1514 origin += point(-scroll_left, Pixels::ZERO);
1515 }
1516 block.element.draw(origin, block.available_space, cx);
1517 }
1518 }
1519
1520 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1521 let style = &self.style;
1522 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1523 let layout = cx
1524 .text_system()
1525 .shape_line(
1526 SharedString::from(" ".repeat(column)),
1527 font_size,
1528 &[TextRun {
1529 len: column,
1530 font: style.text.font(),
1531 color: Hsla::default(),
1532 background_color: None,
1533 underline: None,
1534 }],
1535 )
1536 .unwrap();
1537
1538 layout.width
1539 }
1540
1541 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1542 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1543 self.column_pixels(digit_count, cx)
1544 }
1545
1546 //Folds contained in a hunk are ignored apart from shrinking visual size
1547 //If a fold contains any hunks then that fold line is marked as modified
1548 fn layout_git_gutters(
1549 &self,
1550 display_rows: Range<u32>,
1551 snapshot: &EditorSnapshot,
1552 ) -> Vec<DisplayDiffHunk> {
1553 let buffer_snapshot = &snapshot.buffer_snapshot;
1554
1555 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1556 .to_point(snapshot)
1557 .row;
1558 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1559 .to_point(snapshot)
1560 .row;
1561
1562 buffer_snapshot
1563 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1564 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1565 .dedup()
1566 .collect()
1567 }
1568
1569 fn calculate_relative_line_numbers(
1570 &self,
1571 snapshot: &EditorSnapshot,
1572 rows: &Range<u32>,
1573 relative_to: Option<u32>,
1574 ) -> HashMap<u32, u32> {
1575 let mut relative_rows: HashMap<u32, u32> = Default::default();
1576 let Some(relative_to) = relative_to else {
1577 return relative_rows;
1578 };
1579
1580 let start = rows.start.min(relative_to);
1581 let end = rows.end.max(relative_to);
1582
1583 let buffer_rows = snapshot
1584 .buffer_rows(start)
1585 .take(1 + (end - start) as usize)
1586 .collect::<Vec<_>>();
1587
1588 let head_idx = relative_to - start;
1589 let mut delta = 1;
1590 let mut i = head_idx + 1;
1591 while i < buffer_rows.len() as u32 {
1592 if buffer_rows[i as usize].is_some() {
1593 if rows.contains(&(i + start)) {
1594 relative_rows.insert(i + start, delta);
1595 }
1596 delta += 1;
1597 }
1598 i += 1;
1599 }
1600 delta = 1;
1601 i = head_idx.min(buffer_rows.len() as u32 - 1);
1602 while i > 0 && buffer_rows[i as usize].is_none() {
1603 i -= 1;
1604 }
1605
1606 while i > 0 {
1607 i -= 1;
1608 if buffer_rows[i as usize].is_some() {
1609 if rows.contains(&(i + start)) {
1610 relative_rows.insert(i + start, delta);
1611 }
1612 delta += 1;
1613 }
1614 }
1615
1616 relative_rows
1617 }
1618
1619 fn shape_line_numbers(
1620 &self,
1621 rows: Range<u32>,
1622 active_rows: &BTreeMap<u32, bool>,
1623 newest_selection_head: DisplayPoint,
1624 is_singleton: bool,
1625 snapshot: &EditorSnapshot,
1626 cx: &ViewContext<Editor>,
1627 ) -> (
1628 Vec<Option<ShapedLine>>,
1629 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1630 ) {
1631 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1632 let include_line_numbers = snapshot.mode == EditorMode::Full;
1633 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1634 let mut fold_statuses = Vec::with_capacity(rows.len());
1635 let mut line_number = String::new();
1636 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1637 let relative_to = if is_relative {
1638 Some(newest_selection_head.row())
1639 } else {
1640 None
1641 };
1642
1643 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1644
1645 for (ix, row) in snapshot
1646 .buffer_rows(rows.start)
1647 .take((rows.end - rows.start) as usize)
1648 .enumerate()
1649 {
1650 let display_row = rows.start + ix as u32;
1651 let (active, color) = if active_rows.contains_key(&display_row) {
1652 (true, cx.theme().colors().editor_active_line_number)
1653 } else {
1654 (false, cx.theme().colors().editor_line_number)
1655 };
1656 if let Some(buffer_row) = row {
1657 if include_line_numbers {
1658 line_number.clear();
1659 let default_number = buffer_row + 1;
1660 let number = relative_rows
1661 .get(&(ix as u32 + rows.start))
1662 .unwrap_or(&default_number);
1663 write!(&mut line_number, "{}", number).unwrap();
1664 let run = TextRun {
1665 len: line_number.len(),
1666 font: self.style.text.font(),
1667 color,
1668 background_color: None,
1669 underline: None,
1670 };
1671 let shaped_line = cx
1672 .text_system()
1673 .shape_line(line_number.clone().into(), font_size, &[run])
1674 .unwrap();
1675 shaped_line_numbers.push(Some(shaped_line));
1676 fold_statuses.push(
1677 is_singleton
1678 .then(|| {
1679 snapshot
1680 .fold_for_line(buffer_row)
1681 .map(|fold_status| (fold_status, buffer_row, active))
1682 })
1683 .flatten(),
1684 )
1685 }
1686 } else {
1687 fold_statuses.push(None);
1688 shaped_line_numbers.push(None);
1689 }
1690 }
1691
1692 (shaped_line_numbers, fold_statuses)
1693 }
1694
1695 fn layout_lines(
1696 &self,
1697 rows: Range<u32>,
1698 line_number_layouts: &[Option<ShapedLine>],
1699 snapshot: &EditorSnapshot,
1700 cx: &ViewContext<Editor>,
1701 ) -> Vec<LineWithInvisibles> {
1702 if rows.start >= rows.end {
1703 return Vec::new();
1704 }
1705
1706 // Show the placeholder when the editor is empty
1707 if snapshot.is_empty() {
1708 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1709 let placeholder_color = cx.theme().colors().text_placeholder;
1710 let placeholder_text = snapshot.placeholder_text();
1711
1712 let placeholder_lines = placeholder_text
1713 .as_ref()
1714 .map_or("", AsRef::as_ref)
1715 .split('\n')
1716 .skip(rows.start as usize)
1717 .chain(iter::repeat(""))
1718 .take(rows.len());
1719 placeholder_lines
1720 .filter_map(move |line| {
1721 let run = TextRun {
1722 len: line.len(),
1723 font: self.style.text.font(),
1724 color: placeholder_color,
1725 background_color: None,
1726 underline: Default::default(),
1727 };
1728 cx.text_system()
1729 .shape_line(line.to_string().into(), font_size, &[run])
1730 .log_err()
1731 })
1732 .map(|line| LineWithInvisibles {
1733 line,
1734 invisibles: Vec::new(),
1735 })
1736 .collect()
1737 } else {
1738 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1739 LineWithInvisibles::from_chunks(
1740 chunks,
1741 &self.style.text,
1742 MAX_LINE_LEN,
1743 rows.len() as usize,
1744 line_number_layouts,
1745 snapshot.mode,
1746 cx,
1747 )
1748 }
1749 }
1750
1751 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1752 self.editor.update(cx, |editor, cx| {
1753 let snapshot = editor.snapshot(cx);
1754 let style = self.style.clone();
1755
1756 let font_id = cx.text_system().resolve_font(&style.text.font());
1757 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1758 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1759 let em_width = cx
1760 .text_system()
1761 .typographic_bounds(font_id, font_size, 'm')
1762 .unwrap()
1763 .size
1764 .width;
1765 let em_advance = cx
1766 .text_system()
1767 .advance(font_id, font_size, 'm')
1768 .unwrap()
1769 .width;
1770
1771 let gutter_padding;
1772 let gutter_width;
1773 let gutter_margin;
1774 if snapshot.show_gutter {
1775 let descent = cx.text_system().descent(font_id, font_size);
1776
1777 let gutter_padding_factor = 3.5;
1778 gutter_padding = (em_width * gutter_padding_factor).round();
1779 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1780 gutter_margin = -descent;
1781 } else {
1782 gutter_padding = Pixels::ZERO;
1783 gutter_width = Pixels::ZERO;
1784 gutter_margin = Pixels::ZERO;
1785 };
1786
1787 editor.gutter_width = gutter_width;
1788
1789 let text_width = bounds.size.width - gutter_width;
1790 let overscroll = size(em_width, px(0.));
1791 let _snapshot = {
1792 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1793
1794 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1795 let wrap_width = match editor.soft_wrap_mode(cx) {
1796 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1797 SoftWrap::EditorWidth => editor_width,
1798 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1799 };
1800
1801 if editor.set_wrap_width(Some(wrap_width), cx) {
1802 editor.snapshot(cx)
1803 } else {
1804 snapshot
1805 }
1806 };
1807
1808 let wrap_guides = editor
1809 .wrap_guides(cx)
1810 .iter()
1811 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1812 .collect::<SmallVec<[_; 2]>>();
1813
1814 let gutter_size = size(gutter_width, bounds.size.height);
1815 let text_size = size(text_width, bounds.size.height);
1816
1817 let autoscroll_horizontally =
1818 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1819 let mut snapshot = editor.snapshot(cx);
1820
1821 let scroll_position = snapshot.scroll_position();
1822 // The scroll position is a fractional point, the whole number of which represents
1823 // the top of the window in terms of display rows.
1824 let start_row = scroll_position.y as u32;
1825 let height_in_lines = f32::from(bounds.size.height / line_height);
1826 let max_row = snapshot.max_point().row();
1827
1828 // Add 1 to ensure selections bleed off screen
1829 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1830
1831 let start_anchor = if start_row == 0 {
1832 Anchor::min()
1833 } else {
1834 snapshot
1835 .buffer_snapshot
1836 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1837 };
1838 let end_anchor = if end_row > max_row {
1839 Anchor::max()
1840 } else {
1841 snapshot
1842 .buffer_snapshot
1843 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1844 };
1845
1846 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1847 let mut active_rows = BTreeMap::new();
1848 let is_singleton = editor.is_singleton(cx);
1849
1850 let highlighted_rows = editor.highlighted_rows();
1851 let highlighted_ranges = editor.background_highlights_in_range(
1852 start_anchor..end_anchor,
1853 &snapshot.display_snapshot,
1854 cx.theme().colors(),
1855 );
1856
1857 let mut newest_selection_head = None;
1858
1859 if editor.show_local_selections {
1860 let mut local_selections: Vec<Selection<Point>> = editor
1861 .selections
1862 .disjoint_in_range(start_anchor..end_anchor, cx);
1863 local_selections.extend(editor.selections.pending(cx));
1864 let mut layouts = Vec::new();
1865 let newest = editor.selections.newest(cx);
1866 for selection in local_selections.drain(..) {
1867 let is_empty = selection.start == selection.end;
1868 let is_newest = selection == newest;
1869
1870 let layout = SelectionLayout::new(
1871 selection,
1872 editor.selections.line_mode,
1873 editor.cursor_shape,
1874 &snapshot.display_snapshot,
1875 is_newest,
1876 true,
1877 );
1878 if is_newest {
1879 newest_selection_head = Some(layout.head);
1880 }
1881
1882 for row in cmp::max(layout.active_rows.start, start_row)
1883 ..=cmp::min(layout.active_rows.end, end_row)
1884 {
1885 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1886 *contains_non_empty_selection |= !is_empty;
1887 }
1888 layouts.push(layout);
1889 }
1890
1891 let player = if editor.read_only(cx) {
1892 cx.theme().players().read_only()
1893 } else {
1894 style.local_player
1895 };
1896
1897 selections.push((player, layouts));
1898 }
1899
1900 if let Some(collaboration_hub) = &editor.collaboration_hub {
1901 // When following someone, render the local selections in their color.
1902 if let Some(leader_id) = editor.leader_peer_id {
1903 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1904 if let Some(participant_index) = collaboration_hub
1905 .user_participant_indices(cx)
1906 .get(&collaborator.user_id)
1907 {
1908 if let Some((local_selection_style, _)) = selections.first_mut() {
1909 *local_selection_style = cx
1910 .theme()
1911 .players()
1912 .color_for_participant(participant_index.0);
1913 }
1914 }
1915 }
1916 }
1917
1918 let mut remote_selections = HashMap::default();
1919 for selection in snapshot.remote_selections_in_range(
1920 &(start_anchor..end_anchor),
1921 collaboration_hub.as_ref(),
1922 cx,
1923 ) {
1924 let selection_style = if let Some(participant_index) = selection.participant_index {
1925 cx.theme()
1926 .players()
1927 .color_for_participant(participant_index.0)
1928 } else {
1929 cx.theme().players().absent()
1930 };
1931
1932 // Don't re-render the leader's selections, since the local selections
1933 // match theirs.
1934 if Some(selection.peer_id) == editor.leader_peer_id {
1935 continue;
1936 }
1937
1938 remote_selections
1939 .entry(selection.replica_id)
1940 .or_insert((selection_style, Vec::new()))
1941 .1
1942 .push(SelectionLayout::new(
1943 selection.selection,
1944 selection.line_mode,
1945 selection.cursor_shape,
1946 &snapshot.display_snapshot,
1947 false,
1948 false,
1949 ));
1950 }
1951
1952 selections.extend(remote_selections.into_values());
1953 }
1954
1955 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1956 let show_scrollbars = match scrollbar_settings.show {
1957 ShowScrollbar::Auto => {
1958 // Git
1959 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1960 ||
1961 // Selections
1962 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
1963 // Scrollmanager
1964 || editor.scroll_manager.scrollbars_visible()
1965 }
1966 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1967 ShowScrollbar::Always => true,
1968 ShowScrollbar::Never => false,
1969 };
1970
1971 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1972 let newest = editor.selections.newest::<Point>(cx);
1973 SelectionLayout::new(
1974 newest,
1975 editor.selections.line_mode,
1976 editor.cursor_shape,
1977 &snapshot.display_snapshot,
1978 true,
1979 true,
1980 )
1981 .head
1982 });
1983
1984 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1985 start_row..end_row,
1986 &active_rows,
1987 head_for_relative,
1988 is_singleton,
1989 &snapshot,
1990 cx,
1991 );
1992
1993 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1994
1995 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1996
1997 let mut max_visible_line_width = Pixels::ZERO;
1998 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1999 for line_with_invisibles in &line_layouts {
2000 if line_with_invisibles.line.width > max_visible_line_width {
2001 max_visible_line_width = line_with_invisibles.line.width;
2002 }
2003 }
2004
2005 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2006 .unwrap()
2007 .width;
2008 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2009
2010 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2011 self.layout_blocks(
2012 start_row..end_row,
2013 &snapshot,
2014 bounds.size.width,
2015 scroll_width,
2016 gutter_padding,
2017 gutter_width,
2018 em_width,
2019 gutter_width + gutter_margin,
2020 line_height,
2021 &style,
2022 &line_layouts,
2023 editor,
2024 cx,
2025 )
2026 });
2027
2028 let scroll_max = point(
2029 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2030 max_row as f32,
2031 );
2032
2033 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2034
2035 let autoscrolled = if autoscroll_horizontally {
2036 editor.autoscroll_horizontally(
2037 start_row,
2038 text_size.width,
2039 scroll_width,
2040 em_width,
2041 &line_layouts,
2042 cx,
2043 )
2044 } else {
2045 false
2046 };
2047
2048 if clamped || autoscrolled {
2049 snapshot = editor.snapshot(cx);
2050 }
2051
2052 let mut context_menu = None;
2053 let mut code_actions_indicator = None;
2054 if let Some(newest_selection_head) = newest_selection_head {
2055 if (start_row..end_row).contains(&newest_selection_head.row()) {
2056 if editor.context_menu_visible() {
2057 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2058 context_menu =
2059 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2060 }
2061
2062 let active = matches!(
2063 editor.context_menu.read().as_ref(),
2064 Some(crate::ContextMenu::CodeActions(_))
2065 );
2066
2067 code_actions_indicator = editor
2068 .render_code_actions_indicator(&style, active, cx)
2069 .map(|element| CodeActionsIndicator {
2070 row: newest_selection_head.row(),
2071 button: element,
2072 });
2073 }
2074 }
2075
2076 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2077 let max_size = size(
2078 (120. * em_width) // Default size
2079 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2080 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2081 (16. * line_height) // Default size
2082 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2083 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2084 );
2085
2086 let hover = editor.hover_state.render(
2087 &snapshot,
2088 &style,
2089 visible_rows,
2090 max_size,
2091 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2092 cx,
2093 );
2094
2095 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2096 editor.render_fold_indicators(
2097 fold_statuses,
2098 &style,
2099 editor.gutter_hovered,
2100 line_height,
2101 gutter_margin,
2102 cx,
2103 )
2104 });
2105
2106 let invisible_symbol_font_size = font_size / 2.;
2107 let tab_invisible = cx
2108 .text_system()
2109 .shape_line(
2110 "→".into(),
2111 invisible_symbol_font_size,
2112 &[TextRun {
2113 len: "→".len(),
2114 font: self.style.text.font(),
2115 color: cx.theme().colors().editor_invisible,
2116 background_color: None,
2117 underline: None,
2118 }],
2119 )
2120 .unwrap();
2121 let space_invisible = cx
2122 .text_system()
2123 .shape_line(
2124 "•".into(),
2125 invisible_symbol_font_size,
2126 &[TextRun {
2127 len: "•".len(),
2128 font: self.style.text.font(),
2129 color: cx.theme().colors().editor_invisible,
2130 background_color: None,
2131 underline: None,
2132 }],
2133 )
2134 .unwrap();
2135
2136 LayoutState {
2137 mode: snapshot.mode,
2138 position_map: Arc::new(PositionMap {
2139 size: bounds.size,
2140 scroll_position: point(
2141 scroll_position.x * em_width,
2142 scroll_position.y * line_height,
2143 ),
2144 scroll_max,
2145 line_layouts,
2146 line_height,
2147 em_width,
2148 em_advance,
2149 snapshot,
2150 }),
2151 visible_anchor_range: start_anchor..end_anchor,
2152 visible_display_row_range: start_row..end_row,
2153 wrap_guides,
2154 gutter_size,
2155 gutter_padding,
2156 text_size,
2157 scrollbar_row_range,
2158 show_scrollbars,
2159 is_singleton,
2160 max_row,
2161 gutter_margin,
2162 active_rows,
2163 highlighted_rows,
2164 highlighted_ranges,
2165 line_numbers,
2166 display_hunks,
2167 blocks,
2168 selections,
2169 context_menu,
2170 code_actions_indicator,
2171 fold_indicators,
2172 tab_invisible,
2173 space_invisible,
2174 hover_popovers: hover,
2175 }
2176 })
2177 }
2178
2179 #[allow(clippy::too_many_arguments)]
2180 fn layout_blocks(
2181 &self,
2182 rows: Range<u32>,
2183 snapshot: &EditorSnapshot,
2184 editor_width: Pixels,
2185 scroll_width: Pixels,
2186 gutter_padding: Pixels,
2187 gutter_width: Pixels,
2188 em_width: Pixels,
2189 text_x: Pixels,
2190 line_height: Pixels,
2191 style: &EditorStyle,
2192 line_layouts: &[LineWithInvisibles],
2193 editor: &mut Editor,
2194 cx: &mut ViewContext<Editor>,
2195 ) -> (Pixels, Vec<BlockLayout>) {
2196 let mut block_id = 0;
2197 let (fixed_blocks, non_fixed_blocks) = snapshot
2198 .blocks_in_range(rows.clone())
2199 .partition::<Vec<_>, _>(|(_, block)| match block {
2200 TransformBlock::ExcerptHeader { .. } => false,
2201 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2202 });
2203
2204 let render_block = |block: &TransformBlock,
2205 available_space: Size<AvailableSpace>,
2206 block_id: usize,
2207 editor: &mut Editor,
2208 cx: &mut ViewContext<Editor>| {
2209 let mut element = match block {
2210 TransformBlock::Custom(block) => {
2211 let align_to = block
2212 .position()
2213 .to_point(&snapshot.buffer_snapshot)
2214 .to_display_point(snapshot);
2215 let anchor_x = text_x
2216 + if rows.contains(&align_to.row()) {
2217 line_layouts[(align_to.row() - rows.start) as usize]
2218 .line
2219 .x_for_index(align_to.column() as usize)
2220 } else {
2221 layout_line(align_to.row(), snapshot, style, cx)
2222 .unwrap()
2223 .x_for_index(align_to.column() as usize)
2224 };
2225
2226 block.render(&mut BlockContext {
2227 view_context: cx,
2228 anchor_x,
2229 gutter_padding,
2230 line_height,
2231 gutter_width,
2232 em_width,
2233 block_id,
2234 editor_style: &self.style,
2235 })
2236 }
2237
2238 TransformBlock::ExcerptHeader {
2239 buffer,
2240 range,
2241 starts_new_buffer,
2242 ..
2243 } => {
2244 let include_root = editor
2245 .project
2246 .as_ref()
2247 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2248 .unwrap_or_default();
2249
2250 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2251 let jump_path = ProjectPath {
2252 worktree_id: file.worktree_id(cx),
2253 path: file.path.clone(),
2254 };
2255 let jump_anchor = range
2256 .primary
2257 .as_ref()
2258 .map_or(range.context.start, |primary| primary.start);
2259 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2260
2261 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2262 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2263 });
2264
2265 jump_handler
2266 });
2267
2268 let element = if *starts_new_buffer {
2269 let path = buffer.resolve_file_path(cx, include_root);
2270 let mut filename = None;
2271 let mut parent_path = None;
2272 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2273 if let Some(path) = path {
2274 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2275 parent_path = path
2276 .parent()
2277 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2278 }
2279
2280 div()
2281 .id(("path header container", block_id))
2282 .size_full()
2283 .p_1p5()
2284 .child(
2285 h_stack()
2286 .id("path header block")
2287 .py_1p5()
2288 .pl_3()
2289 .pr_2()
2290 .rounded_lg()
2291 .shadow_md()
2292 .border()
2293 .border_color(cx.theme().colors().border)
2294 .bg(cx.theme().colors().editor_subheader_background)
2295 .justify_between()
2296 .hover(|style| style.bg(cx.theme().colors().element_hover))
2297 .child(
2298 h_stack().gap_3().child(
2299 h_stack()
2300 .gap_2()
2301 .child(
2302 filename
2303 .map(SharedString::from)
2304 .unwrap_or_else(|| "untitled".into()),
2305 )
2306 .when_some(parent_path, |then, path| {
2307 then.child(
2308 div().child(path).text_color(
2309 cx.theme().colors().text_muted,
2310 ),
2311 )
2312 }),
2313 ),
2314 )
2315 .when_some(jump_handler, |this, jump_handler| {
2316 this.cursor_pointer()
2317 .tooltip(|cx| {
2318 Tooltip::for_action(
2319 "Jump to Buffer",
2320 &OpenExcerpts,
2321 cx,
2322 )
2323 })
2324 .on_mouse_down(MouseButton::Left, |_, cx| {
2325 cx.stop_propagation()
2326 })
2327 .on_click(jump_handler)
2328 }),
2329 )
2330 } else {
2331 h_stack()
2332 .id(("collapsed context", block_id))
2333 .size_full()
2334 .gap(gutter_padding)
2335 .child(
2336 h_stack()
2337 .justify_end()
2338 .flex_none()
2339 .w(gutter_width - gutter_padding)
2340 .h_full()
2341 .text_buffer(cx)
2342 .text_color(cx.theme().colors().editor_line_number)
2343 .child("..."),
2344 )
2345 .map(|this| {
2346 if let Some(jump_handler) = jump_handler {
2347 this.child(
2348 ButtonLike::new("jump to collapsed context")
2349 .style(ButtonStyle::Transparent)
2350 .full_width()
2351 .on_click(jump_handler)
2352 .tooltip(|cx| {
2353 Tooltip::for_action(
2354 "Jump to Buffer",
2355 &OpenExcerpts,
2356 cx,
2357 )
2358 })
2359 .child(
2360 div()
2361 .h_px()
2362 .w_full()
2363 .bg(cx.theme().colors().border_variant)
2364 .group_hover("", |style| {
2365 style.bg(cx.theme().colors().border)
2366 }),
2367 ),
2368 )
2369 } else {
2370 this.child(div().size_full().bg(gpui::green()))
2371 }
2372 })
2373 };
2374 element.into_any()
2375 }
2376 };
2377
2378 let size = element.measure(available_space, cx);
2379 (element, size)
2380 };
2381
2382 let mut fixed_block_max_width = Pixels::ZERO;
2383 let mut blocks = Vec::new();
2384 for (row, block) in fixed_blocks {
2385 let available_space = size(
2386 AvailableSpace::MinContent,
2387 AvailableSpace::Definite(block.height() as f32 * line_height),
2388 );
2389 let (element, element_size) =
2390 render_block(block, available_space, block_id, editor, cx);
2391 block_id += 1;
2392 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2393 blocks.push(BlockLayout {
2394 row,
2395 element,
2396 available_space,
2397 style: BlockStyle::Fixed,
2398 });
2399 }
2400 for (row, block) in non_fixed_blocks {
2401 let style = match block {
2402 TransformBlock::Custom(block) => block.style(),
2403 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2404 };
2405 let width = match style {
2406 BlockStyle::Sticky => editor_width,
2407 BlockStyle::Flex => editor_width
2408 .max(fixed_block_max_width)
2409 .max(gutter_width + scroll_width),
2410 BlockStyle::Fixed => unreachable!(),
2411 };
2412 let available_space = size(
2413 AvailableSpace::Definite(width),
2414 AvailableSpace::Definite(block.height() as f32 * line_height),
2415 );
2416 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2417 block_id += 1;
2418 blocks.push(BlockLayout {
2419 row,
2420 element,
2421 available_space,
2422 style,
2423 });
2424 }
2425 (
2426 scroll_width.max(fixed_block_max_width - gutter_width),
2427 blocks,
2428 )
2429 }
2430
2431 fn paint_scroll_wheel_listener(
2432 &mut self,
2433 interactive_bounds: &InteractiveBounds,
2434 layout: &LayoutState,
2435 cx: &mut WindowContext,
2436 ) {
2437 cx.on_mouse_event({
2438 let position_map = layout.position_map.clone();
2439 let editor = self.editor.clone();
2440 let interactive_bounds = interactive_bounds.clone();
2441 let mut delta = ScrollDelta::default();
2442
2443 move |event: &ScrollWheelEvent, phase, cx| {
2444 if phase == DispatchPhase::Bubble
2445 && interactive_bounds.visibly_contains(&event.position, cx)
2446 {
2447 delta = delta.coalesce(event.delta);
2448 editor.update(cx, |editor, cx| {
2449 let position = event.position;
2450 let position_map: &PositionMap = &position_map;
2451 let bounds = &interactive_bounds;
2452 if !bounds.visibly_contains(&position, cx) {
2453 return;
2454 }
2455
2456 let line_height = position_map.line_height;
2457 let max_glyph_width = position_map.em_width;
2458 let (delta, axis) = match delta {
2459 gpui::ScrollDelta::Pixels(mut pixels) => {
2460 //Trackpad
2461 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2462 (pixels, axis)
2463 }
2464
2465 gpui::ScrollDelta::Lines(lines) => {
2466 //Not trackpad
2467 let pixels =
2468 point(lines.x * max_glyph_width, lines.y * line_height);
2469 (pixels, None)
2470 }
2471 };
2472
2473 let scroll_position = position_map.snapshot.scroll_position();
2474 let x = f32::from(
2475 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2476 );
2477 let y =
2478 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2479 let scroll_position =
2480 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2481 editor.scroll(scroll_position, axis, cx);
2482 cx.stop_propagation();
2483 });
2484 }
2485 }
2486 });
2487 }
2488
2489 fn paint_mouse_listeners(
2490 &mut self,
2491 bounds: Bounds<Pixels>,
2492 gutter_bounds: Bounds<Pixels>,
2493 text_bounds: Bounds<Pixels>,
2494 layout: &LayoutState,
2495 cx: &mut WindowContext,
2496 ) {
2497 let interactive_bounds = InteractiveBounds {
2498 bounds: bounds.intersect(&cx.content_mask().bounds),
2499 stacking_order: cx.stacking_order().clone(),
2500 };
2501
2502 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2503
2504 cx.on_mouse_event({
2505 let position_map = layout.position_map.clone();
2506 let editor = self.editor.clone();
2507 let stacking_order = cx.stacking_order().clone();
2508 let interactive_bounds = interactive_bounds.clone();
2509
2510 move |event: &MouseDownEvent, phase, cx| {
2511 if phase == DispatchPhase::Bubble
2512 && interactive_bounds.visibly_contains(&event.position, cx)
2513 {
2514 match event.button {
2515 MouseButton::Left => editor.update(cx, |editor, cx| {
2516 Self::mouse_left_down(
2517 editor,
2518 event,
2519 &position_map,
2520 text_bounds,
2521 gutter_bounds,
2522 &stacking_order,
2523 cx,
2524 );
2525 }),
2526 MouseButton::Right => editor.update(cx, |editor, cx| {
2527 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2528 }),
2529 _ => {}
2530 };
2531 }
2532 }
2533 });
2534
2535 cx.on_mouse_event({
2536 let position_map = layout.position_map.clone();
2537 let editor = self.editor.clone();
2538 let stacking_order = cx.stacking_order().clone();
2539 let interactive_bounds = interactive_bounds.clone();
2540
2541 move |event: &MouseUpEvent, phase, cx| {
2542 if phase == DispatchPhase::Bubble
2543 && interactive_bounds.visibly_contains(&event.position, cx)
2544 {
2545 editor.update(cx, |editor, cx| {
2546 Self::mouse_up(
2547 editor,
2548 event,
2549 &position_map,
2550 text_bounds,
2551 &stacking_order,
2552 cx,
2553 )
2554 });
2555 }
2556 }
2557 });
2558 cx.on_mouse_event({
2559 let position_map = layout.position_map.clone();
2560 let editor = self.editor.clone();
2561 let stacking_order = cx.stacking_order().clone();
2562
2563 move |event: &MouseMoveEvent, phase, cx| {
2564 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2565
2566 if phase == DispatchPhase::Bubble {
2567 editor.update(cx, |editor, cx| {
2568 if event.pressed_button == Some(MouseButton::Left) {
2569 Self::mouse_dragged(
2570 editor,
2571 event,
2572 &position_map,
2573 text_bounds,
2574 gutter_bounds,
2575 &stacking_order,
2576 cx,
2577 )
2578 }
2579
2580 if interactive_bounds.visibly_contains(&event.position, cx) {
2581 Self::mouse_moved(
2582 editor,
2583 event,
2584 &position_map,
2585 text_bounds,
2586 gutter_bounds,
2587 &stacking_order,
2588 cx,
2589 )
2590 }
2591 });
2592 }
2593 }
2594 });
2595 }
2596}
2597
2598#[derive(Debug)]
2599pub struct LineWithInvisibles {
2600 pub line: ShapedLine,
2601 invisibles: Vec<Invisible>,
2602}
2603
2604impl LineWithInvisibles {
2605 fn from_chunks<'a>(
2606 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2607 text_style: &TextStyle,
2608 max_line_len: usize,
2609 max_line_count: usize,
2610 line_number_layouts: &[Option<ShapedLine>],
2611 editor_mode: EditorMode,
2612 cx: &WindowContext,
2613 ) -> Vec<Self> {
2614 let mut layouts = Vec::with_capacity(max_line_count);
2615 let mut line = String::new();
2616 let mut invisibles = Vec::new();
2617 let mut styles = Vec::new();
2618 let mut non_whitespace_added = false;
2619 let mut row = 0;
2620 let mut line_exceeded_max_len = false;
2621 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2622
2623 for highlighted_chunk in chunks.chain([HighlightedChunk {
2624 chunk: "\n",
2625 style: None,
2626 is_tab: false,
2627 }]) {
2628 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2629 if ix > 0 {
2630 let shaped_line = cx
2631 .text_system()
2632 .shape_line(line.clone().into(), font_size, &styles)
2633 .unwrap();
2634 layouts.push(Self {
2635 line: shaped_line,
2636 invisibles: invisibles.drain(..).collect(),
2637 });
2638
2639 line.clear();
2640 styles.clear();
2641 row += 1;
2642 line_exceeded_max_len = false;
2643 non_whitespace_added = false;
2644 if row == max_line_count {
2645 return layouts;
2646 }
2647 }
2648
2649 if !line_chunk.is_empty() && !line_exceeded_max_len {
2650 let text_style = if let Some(style) = highlighted_chunk.style {
2651 Cow::Owned(text_style.clone().highlight(style))
2652 } else {
2653 Cow::Borrowed(text_style)
2654 };
2655
2656 if line.len() + line_chunk.len() > max_line_len {
2657 let mut chunk_len = max_line_len - line.len();
2658 while !line_chunk.is_char_boundary(chunk_len) {
2659 chunk_len -= 1;
2660 }
2661 line_chunk = &line_chunk[..chunk_len];
2662 line_exceeded_max_len = true;
2663 }
2664
2665 styles.push(TextRun {
2666 len: line_chunk.len(),
2667 font: text_style.font(),
2668 color: text_style.color,
2669 background_color: text_style.background_color,
2670 underline: text_style.underline,
2671 });
2672
2673 if editor_mode == EditorMode::Full {
2674 // Line wrap pads its contents with fake whitespaces,
2675 // avoid printing them
2676 let inside_wrapped_string = line_number_layouts
2677 .get(row)
2678 .and_then(|layout| layout.as_ref())
2679 .is_none();
2680 if highlighted_chunk.is_tab {
2681 if non_whitespace_added || !inside_wrapped_string {
2682 invisibles.push(Invisible::Tab {
2683 line_start_offset: line.len(),
2684 });
2685 }
2686 } else {
2687 invisibles.extend(
2688 line_chunk
2689 .chars()
2690 .enumerate()
2691 .filter(|(_, line_char)| {
2692 let is_whitespace = line_char.is_whitespace();
2693 non_whitespace_added |= !is_whitespace;
2694 is_whitespace
2695 && (non_whitespace_added || !inside_wrapped_string)
2696 })
2697 .map(|(whitespace_index, _)| Invisible::Whitespace {
2698 line_offset: line.len() + whitespace_index,
2699 }),
2700 )
2701 }
2702 }
2703
2704 line.push_str(line_chunk);
2705 }
2706 }
2707 }
2708
2709 layouts
2710 }
2711
2712 fn draw(
2713 &self,
2714 layout: &LayoutState,
2715 row: u32,
2716 content_origin: gpui::Point<Pixels>,
2717 whitespace_setting: ShowWhitespaceSetting,
2718 selection_ranges: &[Range<DisplayPoint>],
2719 cx: &mut WindowContext,
2720 ) {
2721 let line_height = layout.position_map.line_height;
2722 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2723
2724 self.line
2725 .paint(
2726 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2727 line_height,
2728 cx,
2729 )
2730 .log_err();
2731
2732 self.draw_invisibles(
2733 &selection_ranges,
2734 layout,
2735 content_origin,
2736 line_y,
2737 row,
2738 line_height,
2739 whitespace_setting,
2740 cx,
2741 );
2742 }
2743
2744 fn draw_invisibles(
2745 &self,
2746 selection_ranges: &[Range<DisplayPoint>],
2747 layout: &LayoutState,
2748 content_origin: gpui::Point<Pixels>,
2749 line_y: Pixels,
2750 row: u32,
2751 line_height: Pixels,
2752 whitespace_setting: ShowWhitespaceSetting,
2753 cx: &mut WindowContext,
2754 ) {
2755 let allowed_invisibles_regions = match whitespace_setting {
2756 ShowWhitespaceSetting::None => return,
2757 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2758 ShowWhitespaceSetting::All => None,
2759 };
2760
2761 for invisible in &self.invisibles {
2762 let (&token_offset, invisible_symbol) = match invisible {
2763 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2764 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2765 };
2766
2767 let x_offset = self.line.x_for_index(token_offset);
2768 let invisible_offset =
2769 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2770 let origin = content_origin
2771 + gpui::point(
2772 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2773 line_y,
2774 );
2775
2776 if let Some(allowed_regions) = allowed_invisibles_regions {
2777 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2778 if !allowed_regions
2779 .iter()
2780 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2781 {
2782 continue;
2783 }
2784 }
2785 invisible_symbol.paint(origin, line_height, cx).log_err();
2786 }
2787 }
2788}
2789
2790#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2791enum Invisible {
2792 Tab { line_start_offset: usize },
2793 Whitespace { line_offset: usize },
2794}
2795
2796impl Element for EditorElement {
2797 type State = ();
2798
2799 fn request_layout(
2800 &mut self,
2801 _element_state: Option<Self::State>,
2802 cx: &mut gpui::WindowContext,
2803 ) -> (gpui::LayoutId, Self::State) {
2804 self.editor.update(cx, |editor, cx| {
2805 editor.set_style(self.style.clone(), cx);
2806
2807 let layout_id = match editor.mode {
2808 EditorMode::SingleLine => {
2809 let rem_size = cx.rem_size();
2810 let mut style = Style::default();
2811 style.size.width = relative(1.).into();
2812 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2813 cx.request_layout(&style, None)
2814 }
2815 EditorMode::AutoHeight { max_lines } => {
2816 let editor_handle = cx.view().clone();
2817 let max_line_number_width =
2818 self.max_line_number_width(&editor.snapshot(cx), cx);
2819 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2820 editor_handle
2821 .update(cx, |editor, cx| {
2822 compute_auto_height_layout(
2823 editor,
2824 max_lines,
2825 max_line_number_width,
2826 known_dimensions,
2827 cx,
2828 )
2829 })
2830 .unwrap_or_default()
2831 })
2832 }
2833 EditorMode::Full => {
2834 let mut style = Style::default();
2835 style.size.width = relative(1.).into();
2836 style.size.height = relative(1.).into();
2837 cx.request_layout(&style, None)
2838 }
2839 };
2840
2841 (layout_id, ())
2842 })
2843 }
2844
2845 fn paint(
2846 &mut self,
2847 bounds: Bounds<gpui::Pixels>,
2848 _element_state: &mut Self::State,
2849 cx: &mut gpui::WindowContext,
2850 ) {
2851 let editor = self.editor.clone();
2852
2853 cx.with_text_style(
2854 Some(gpui::TextStyleRefinement {
2855 font_size: Some(self.style.text.font_size),
2856 ..Default::default()
2857 }),
2858 |cx| {
2859 let mut layout = self.compute_layout(bounds, cx);
2860 let gutter_bounds = Bounds {
2861 origin: bounds.origin,
2862 size: layout.gutter_size,
2863 };
2864 let text_bounds = Bounds {
2865 origin: gutter_bounds.upper_right(),
2866 size: layout.text_size,
2867 };
2868
2869 let focus_handle = editor.focus_handle(cx);
2870 let key_context = self.editor.read(cx).key_context(cx);
2871 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2872 self.register_actions(cx);
2873 self.register_key_listeners(cx);
2874
2875 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2876 let input_handler =
2877 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2878 cx.handle_input(&focus_handle, input_handler);
2879
2880 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2881 if layout.gutter_size.width > Pixels::ZERO {
2882 self.paint_gutter(gutter_bounds, &mut layout, cx);
2883 }
2884 self.paint_text(text_bounds, &mut layout, cx);
2885
2886 cx.with_z_index(0, |cx| {
2887 self.paint_mouse_listeners(
2888 bounds,
2889 gutter_bounds,
2890 text_bounds,
2891 &layout,
2892 cx,
2893 );
2894 });
2895 if !layout.blocks.is_empty() {
2896 cx.with_z_index(0, |cx| {
2897 cx.with_element_id(Some("editor_blocks"), |cx| {
2898 self.paint_blocks(bounds, &mut layout, cx);
2899 });
2900 })
2901 }
2902
2903 cx.with_z_index(1, |cx| {
2904 self.paint_overlays(text_bounds, &mut layout, cx);
2905 });
2906
2907 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2908 });
2909 })
2910 },
2911 );
2912 }
2913}
2914
2915impl IntoElement for EditorElement {
2916 type Element = Self;
2917
2918 fn element_id(&self) -> Option<gpui::ElementId> {
2919 self.editor.element_id()
2920 }
2921
2922 fn into_element(self) -> Self::Element {
2923 self
2924 }
2925}
2926
2927type BufferRow = u32;
2928
2929pub struct LayoutState {
2930 position_map: Arc<PositionMap>,
2931 gutter_size: Size<Pixels>,
2932 gutter_padding: Pixels,
2933 gutter_margin: Pixels,
2934 text_size: gpui::Size<Pixels>,
2935 mode: EditorMode,
2936 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2937 visible_anchor_range: Range<Anchor>,
2938 visible_display_row_range: Range<u32>,
2939 active_rows: BTreeMap<u32, bool>,
2940 highlighted_rows: Option<Range<u32>>,
2941 line_numbers: Vec<Option<ShapedLine>>,
2942 display_hunks: Vec<DisplayDiffHunk>,
2943 blocks: Vec<BlockLayout>,
2944 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2945 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2946 scrollbar_row_range: Range<f32>,
2947 show_scrollbars: bool,
2948 is_singleton: bool,
2949 max_row: u32,
2950 context_menu: Option<(DisplayPoint, AnyElement)>,
2951 code_actions_indicator: Option<CodeActionsIndicator>,
2952 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2953 fold_indicators: Vec<Option<IconButton>>,
2954 tab_invisible: ShapedLine,
2955 space_invisible: ShapedLine,
2956}
2957
2958struct CodeActionsIndicator {
2959 row: u32,
2960 button: IconButton,
2961}
2962
2963struct PositionMap {
2964 size: Size<Pixels>,
2965 line_height: Pixels,
2966 scroll_position: gpui::Point<Pixels>,
2967 scroll_max: gpui::Point<f32>,
2968 em_width: Pixels,
2969 em_advance: Pixels,
2970 line_layouts: Vec<LineWithInvisibles>,
2971 snapshot: EditorSnapshot,
2972}
2973
2974#[derive(Debug, Copy, Clone)]
2975pub struct PointForPosition {
2976 pub previous_valid: DisplayPoint,
2977 pub next_valid: DisplayPoint,
2978 pub exact_unclipped: DisplayPoint,
2979 pub column_overshoot_after_line_end: u32,
2980}
2981
2982impl PointForPosition {
2983 #[cfg(test)]
2984 pub fn valid(valid: DisplayPoint) -> Self {
2985 Self {
2986 previous_valid: valid,
2987 next_valid: valid,
2988 exact_unclipped: valid,
2989 column_overshoot_after_line_end: 0,
2990 }
2991 }
2992
2993 pub fn as_valid(&self) -> Option<DisplayPoint> {
2994 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2995 Some(self.previous_valid)
2996 } else {
2997 None
2998 }
2999 }
3000}
3001
3002impl PositionMap {
3003 fn point_for_position(
3004 &self,
3005 text_bounds: Bounds<Pixels>,
3006 position: gpui::Point<Pixels>,
3007 ) -> PointForPosition {
3008 let scroll_position = self.snapshot.scroll_position();
3009 let position = position - text_bounds.origin;
3010 let y = position.y.max(px(0.)).min(self.size.height);
3011 let x = position.x + (scroll_position.x * self.em_width);
3012 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3013
3014 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3015 .line_layouts
3016 .get(row as usize - scroll_position.y as usize)
3017 .map(|&LineWithInvisibles { ref line, .. }| line)
3018 {
3019 if let Some(ix) = line.index_for_x(x) {
3020 (ix as u32, px(0.))
3021 } else {
3022 (line.len as u32, px(0.).max(x - line.width))
3023 }
3024 } else {
3025 (0, x)
3026 };
3027
3028 let mut exact_unclipped = DisplayPoint::new(row, column);
3029 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3030 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3031
3032 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3033 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3034 PointForPosition {
3035 previous_valid,
3036 next_valid,
3037 exact_unclipped,
3038 column_overshoot_after_line_end,
3039 }
3040 }
3041}
3042
3043struct BlockLayout {
3044 row: u32,
3045 element: AnyElement,
3046 available_space: Size<AvailableSpace>,
3047 style: BlockStyle,
3048}
3049
3050fn layout_line(
3051 row: u32,
3052 snapshot: &EditorSnapshot,
3053 style: &EditorStyle,
3054 cx: &WindowContext,
3055) -> Result<ShapedLine> {
3056 let mut line = snapshot.line(row);
3057
3058 if line.len() > MAX_LINE_LEN {
3059 let mut len = MAX_LINE_LEN;
3060 while !line.is_char_boundary(len) {
3061 len -= 1;
3062 }
3063
3064 line.truncate(len);
3065 }
3066
3067 cx.text_system().shape_line(
3068 line.into(),
3069 style.text.font_size.to_pixels(cx.rem_size()),
3070 &[TextRun {
3071 len: snapshot.line_len(row) as usize,
3072 font: style.text.font(),
3073 color: Hsla::default(),
3074 background_color: None,
3075 underline: None,
3076 }],
3077 )
3078}
3079
3080#[derive(Debug)]
3081pub struct Cursor {
3082 origin: gpui::Point<Pixels>,
3083 block_width: Pixels,
3084 line_height: Pixels,
3085 color: Hsla,
3086 shape: CursorShape,
3087 block_text: Option<ShapedLine>,
3088}
3089
3090impl Cursor {
3091 pub fn new(
3092 origin: gpui::Point<Pixels>,
3093 block_width: Pixels,
3094 line_height: Pixels,
3095 color: Hsla,
3096 shape: CursorShape,
3097 block_text: Option<ShapedLine>,
3098 ) -> Cursor {
3099 Cursor {
3100 origin,
3101 block_width,
3102 line_height,
3103 color,
3104 shape,
3105 block_text,
3106 }
3107 }
3108
3109 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3110 Bounds {
3111 origin: self.origin + origin,
3112 size: size(self.block_width, self.line_height),
3113 }
3114 }
3115
3116 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3117 let bounds = match self.shape {
3118 CursorShape::Bar => Bounds {
3119 origin: self.origin + origin,
3120 size: size(px(2.0), self.line_height),
3121 },
3122 CursorShape::Block | CursorShape::Hollow => Bounds {
3123 origin: self.origin + origin,
3124 size: size(self.block_width, self.line_height),
3125 },
3126 CursorShape::Underscore => Bounds {
3127 origin: self.origin
3128 + origin
3129 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3130 size: size(self.block_width, px(2.0)),
3131 },
3132 };
3133
3134 //Draw background or border quad
3135 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3136 outline(bounds, self.color)
3137 } else {
3138 fill(bounds, self.color)
3139 };
3140
3141 cx.paint_quad(cursor);
3142
3143 if let Some(block_text) = &self.block_text {
3144 block_text
3145 .paint(self.origin + origin, self.line_height, cx)
3146 .log_err();
3147 }
3148 }
3149
3150 pub fn shape(&self) -> CursorShape {
3151 self.shape
3152 }
3153}
3154
3155#[derive(Debug)]
3156pub struct HighlightedRange {
3157 pub start_y: Pixels,
3158 pub line_height: Pixels,
3159 pub lines: Vec<HighlightedRangeLine>,
3160 pub color: Hsla,
3161 pub corner_radius: Pixels,
3162}
3163
3164#[derive(Debug)]
3165pub struct HighlightedRangeLine {
3166 pub start_x: Pixels,
3167 pub end_x: Pixels,
3168}
3169
3170impl HighlightedRange {
3171 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3172 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3173 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3174 self.paint_lines(
3175 self.start_y + self.line_height,
3176 &self.lines[1..],
3177 bounds,
3178 cx,
3179 );
3180 } else {
3181 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3182 }
3183 }
3184
3185 fn paint_lines(
3186 &self,
3187 start_y: Pixels,
3188 lines: &[HighlightedRangeLine],
3189 _bounds: Bounds<Pixels>,
3190 cx: &mut WindowContext,
3191 ) {
3192 if lines.is_empty() {
3193 return;
3194 }
3195
3196 let first_line = lines.first().unwrap();
3197 let last_line = lines.last().unwrap();
3198
3199 let first_top_left = point(first_line.start_x, start_y);
3200 let first_top_right = point(first_line.end_x, start_y);
3201
3202 let curve_height = point(Pixels::ZERO, self.corner_radius);
3203 let curve_width = |start_x: Pixels, end_x: Pixels| {
3204 let max = (end_x - start_x) / 2.;
3205 let width = if max < self.corner_radius {
3206 max
3207 } else {
3208 self.corner_radius
3209 };
3210
3211 point(width, Pixels::ZERO)
3212 };
3213
3214 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3215 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3216 path.curve_to(first_top_right + curve_height, first_top_right);
3217
3218 let mut iter = lines.iter().enumerate().peekable();
3219 while let Some((ix, line)) = iter.next() {
3220 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3221
3222 if let Some((_, next_line)) = iter.peek() {
3223 let next_top_right = point(next_line.end_x, bottom_right.y);
3224
3225 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3226 Ordering::Equal => {
3227 path.line_to(bottom_right);
3228 }
3229 Ordering::Less => {
3230 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3231 path.line_to(bottom_right - curve_height);
3232 if self.corner_radius > Pixels::ZERO {
3233 path.curve_to(bottom_right - curve_width, bottom_right);
3234 }
3235 path.line_to(next_top_right + curve_width);
3236 if self.corner_radius > Pixels::ZERO {
3237 path.curve_to(next_top_right + curve_height, next_top_right);
3238 }
3239 }
3240 Ordering::Greater => {
3241 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3242 path.line_to(bottom_right - curve_height);
3243 if self.corner_radius > Pixels::ZERO {
3244 path.curve_to(bottom_right + curve_width, bottom_right);
3245 }
3246 path.line_to(next_top_right - curve_width);
3247 if self.corner_radius > Pixels::ZERO {
3248 path.curve_to(next_top_right + curve_height, next_top_right);
3249 }
3250 }
3251 }
3252 } else {
3253 let curve_width = curve_width(line.start_x, line.end_x);
3254 path.line_to(bottom_right - curve_height);
3255 if self.corner_radius > Pixels::ZERO {
3256 path.curve_to(bottom_right - curve_width, bottom_right);
3257 }
3258
3259 let bottom_left = point(line.start_x, bottom_right.y);
3260 path.line_to(bottom_left + curve_width);
3261 if self.corner_radius > Pixels::ZERO {
3262 path.curve_to(bottom_left - curve_height, bottom_left);
3263 }
3264 }
3265 }
3266
3267 if first_line.start_x > last_line.start_x {
3268 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3269 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3270 path.line_to(second_top_left + curve_height);
3271 if self.corner_radius > Pixels::ZERO {
3272 path.curve_to(second_top_left + curve_width, second_top_left);
3273 }
3274 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3275 path.line_to(first_bottom_left - curve_width);
3276 if self.corner_radius > Pixels::ZERO {
3277 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3278 }
3279 }
3280
3281 path.line_to(first_top_left + curve_height);
3282 if self.corner_radius > Pixels::ZERO {
3283 path.curve_to(first_top_left + top_curve_width, first_top_left);
3284 }
3285 path.line_to(first_top_right - top_curve_width);
3286
3287 cx.paint_path(path, self.color);
3288 }
3289}
3290
3291pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3292 (delta.pow(1.5) / 100.0).into()
3293}
3294
3295fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3296 (delta.pow(1.2) / 300.0).into()
3297}
3298
3299#[cfg(test)]
3300mod tests {
3301 use super::*;
3302 use crate::{
3303 display_map::{BlockDisposition, BlockProperties},
3304 editor_tests::{init_test, update_test_language_settings},
3305 Editor, MultiBuffer,
3306 };
3307 use gpui::TestAppContext;
3308 use language::language_settings;
3309 use log::info;
3310 use std::{num::NonZeroU32, sync::Arc};
3311 use util::test::sample_text;
3312
3313 #[gpui::test]
3314 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3315 init_test(cx, |_| {});
3316 let window = cx.add_window(|cx| {
3317 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3318 Editor::new(EditorMode::Full, buffer, None, cx)
3319 });
3320
3321 let editor = window.root(cx).unwrap();
3322 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3323 let element = EditorElement::new(&editor, style);
3324
3325 let layouts = window
3326 .update(cx, |editor, cx| {
3327 let snapshot = editor.snapshot(cx);
3328 element
3329 .shape_line_numbers(
3330 0..6,
3331 &Default::default(),
3332 DisplayPoint::new(0, 0),
3333 false,
3334 &snapshot,
3335 cx,
3336 )
3337 .0
3338 })
3339 .unwrap();
3340 assert_eq!(layouts.len(), 6);
3341
3342 let relative_rows = window
3343 .update(cx, |editor, cx| {
3344 let snapshot = editor.snapshot(cx);
3345 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3346 })
3347 .unwrap();
3348 assert_eq!(relative_rows[&0], 3);
3349 assert_eq!(relative_rows[&1], 2);
3350 assert_eq!(relative_rows[&2], 1);
3351 // current line has no relative number
3352 assert_eq!(relative_rows[&4], 1);
3353 assert_eq!(relative_rows[&5], 2);
3354
3355 // works if cursor is before screen
3356 let relative_rows = window
3357 .update(cx, |editor, cx| {
3358 let snapshot = editor.snapshot(cx);
3359
3360 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3361 })
3362 .unwrap();
3363 assert_eq!(relative_rows.len(), 3);
3364 assert_eq!(relative_rows[&3], 2);
3365 assert_eq!(relative_rows[&4], 3);
3366 assert_eq!(relative_rows[&5], 4);
3367
3368 // works if cursor is after screen
3369 let relative_rows = window
3370 .update(cx, |editor, cx| {
3371 let snapshot = editor.snapshot(cx);
3372
3373 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3374 })
3375 .unwrap();
3376 assert_eq!(relative_rows.len(), 3);
3377 assert_eq!(relative_rows[&0], 5);
3378 assert_eq!(relative_rows[&1], 4);
3379 assert_eq!(relative_rows[&2], 3);
3380 }
3381
3382 #[gpui::test]
3383 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3384 init_test(cx, |_| {});
3385
3386 let window = cx.add_window(|cx| {
3387 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3388 Editor::new(EditorMode::Full, buffer, None, cx)
3389 });
3390 let editor = window.root(cx).unwrap();
3391 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3392 let mut element = EditorElement::new(&editor, style);
3393
3394 window
3395 .update(cx, |editor, cx| {
3396 editor.cursor_shape = CursorShape::Block;
3397 editor.change_selections(None, cx, |s| {
3398 s.select_ranges([
3399 Point::new(0, 0)..Point::new(1, 0),
3400 Point::new(3, 2)..Point::new(3, 3),
3401 Point::new(5, 6)..Point::new(6, 0),
3402 ]);
3403 });
3404 })
3405 .unwrap();
3406 let state = cx
3407 .update_window(window.into(), |_, cx| {
3408 element.compute_layout(
3409 Bounds {
3410 origin: point(px(500.), px(500.)),
3411 size: size(px(500.), px(500.)),
3412 },
3413 cx,
3414 )
3415 })
3416 .unwrap();
3417
3418 assert_eq!(state.selections.len(), 1);
3419 let local_selections = &state.selections[0].1;
3420 assert_eq!(local_selections.len(), 3);
3421 // moves cursor back one line
3422 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3423 assert_eq!(
3424 local_selections[0].range,
3425 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3426 );
3427
3428 // moves cursor back one column
3429 assert_eq!(
3430 local_selections[1].range,
3431 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3432 );
3433 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3434
3435 // leaves cursor on the max point
3436 assert_eq!(
3437 local_selections[2].range,
3438 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3439 );
3440 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3441
3442 // active lines does not include 1 (even though the range of the selection does)
3443 assert_eq!(
3444 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3445 vec![0, 3, 5, 6]
3446 );
3447
3448 // multi-buffer support
3449 // in DisplayPoint co-ordinates, this is what we're dealing with:
3450 // 0: [[file
3451 // 1: header]]
3452 // 2: aaaaaa
3453 // 3: bbbbbb
3454 // 4: cccccc
3455 // 5:
3456 // 6: ...
3457 // 7: ffffff
3458 // 8: gggggg
3459 // 9: hhhhhh
3460 // 10:
3461 // 11: [[file
3462 // 12: header]]
3463 // 13: bbbbbb
3464 // 14: cccccc
3465 // 15: dddddd
3466 let window = cx.add_window(|cx| {
3467 let buffer = MultiBuffer::build_multi(
3468 [
3469 (
3470 &(sample_text(8, 6, 'a') + "\n"),
3471 vec![
3472 Point::new(0, 0)..Point::new(3, 0),
3473 Point::new(4, 0)..Point::new(7, 0),
3474 ],
3475 ),
3476 (
3477 &(sample_text(8, 6, 'a') + "\n"),
3478 vec![Point::new(1, 0)..Point::new(3, 0)],
3479 ),
3480 ],
3481 cx,
3482 );
3483 Editor::new(EditorMode::Full, buffer, None, cx)
3484 });
3485 let editor = window.root(cx).unwrap();
3486 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3487 let mut element = EditorElement::new(&editor, style);
3488 let _state = window.update(cx, |editor, cx| {
3489 editor.cursor_shape = CursorShape::Block;
3490 editor.change_selections(None, cx, |s| {
3491 s.select_display_ranges([
3492 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3493 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3494 ]);
3495 });
3496 });
3497
3498 let state = cx
3499 .update_window(window.into(), |_, cx| {
3500 element.compute_layout(
3501 Bounds {
3502 origin: point(px(500.), px(500.)),
3503 size: size(px(500.), px(500.)),
3504 },
3505 cx,
3506 )
3507 })
3508 .unwrap();
3509 assert_eq!(state.selections.len(), 1);
3510 let local_selections = &state.selections[0].1;
3511 assert_eq!(local_selections.len(), 2);
3512
3513 // moves cursor on excerpt boundary back a line
3514 // and doesn't allow selection to bleed through
3515 assert_eq!(
3516 local_selections[0].range,
3517 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3518 );
3519 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3520 // moves cursor on buffer boundary back two lines
3521 // and doesn't allow selection to bleed through
3522 assert_eq!(
3523 local_selections[1].range,
3524 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3525 );
3526 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3527 }
3528
3529 #[gpui::test]
3530 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3531 init_test(cx, |_| {});
3532
3533 let window = cx.add_window(|cx| {
3534 let buffer = MultiBuffer::build_simple("", cx);
3535 Editor::new(EditorMode::Full, buffer, None, cx)
3536 });
3537 let editor = window.root(cx).unwrap();
3538 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3539 window
3540 .update(cx, |editor, cx| {
3541 editor.set_placeholder_text("hello", cx);
3542 editor.insert_blocks(
3543 [BlockProperties {
3544 style: BlockStyle::Fixed,
3545 disposition: BlockDisposition::Above,
3546 height: 3,
3547 position: Anchor::min(),
3548 render: Arc::new(|_| div().into_any()),
3549 }],
3550 None,
3551 cx,
3552 );
3553
3554 // Blur the editor so that it displays placeholder text.
3555 cx.blur();
3556 })
3557 .unwrap();
3558
3559 let mut element = EditorElement::new(&editor, style);
3560 let state = cx
3561 .update_window(window.into(), |_, cx| {
3562 element.compute_layout(
3563 Bounds {
3564 origin: point(px(500.), px(500.)),
3565 size: size(px(500.), px(500.)),
3566 },
3567 cx,
3568 )
3569 })
3570 .unwrap();
3571 let size = state.position_map.size;
3572
3573 assert_eq!(state.position_map.line_layouts.len(), 4);
3574 assert_eq!(
3575 state
3576 .line_numbers
3577 .iter()
3578 .map(Option::is_some)
3579 .collect::<Vec<_>>(),
3580 &[false, false, false, true]
3581 );
3582
3583 // Don't panic.
3584 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3585 cx.update_window(window.into(), |_, cx| {
3586 element.paint(bounds, &mut (), cx);
3587 })
3588 .unwrap()
3589 }
3590
3591 #[gpui::test]
3592 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3593 const TAB_SIZE: u32 = 4;
3594
3595 let input_text = "\t \t|\t| a b";
3596 let expected_invisibles = vec![
3597 Invisible::Tab {
3598 line_start_offset: 0,
3599 },
3600 Invisible::Whitespace {
3601 line_offset: TAB_SIZE as usize,
3602 },
3603 Invisible::Tab {
3604 line_start_offset: TAB_SIZE as usize + 1,
3605 },
3606 Invisible::Tab {
3607 line_start_offset: TAB_SIZE as usize * 2 + 1,
3608 },
3609 Invisible::Whitespace {
3610 line_offset: TAB_SIZE as usize * 3 + 1,
3611 },
3612 Invisible::Whitespace {
3613 line_offset: TAB_SIZE as usize * 3 + 3,
3614 },
3615 ];
3616 assert_eq!(
3617 expected_invisibles.len(),
3618 input_text
3619 .chars()
3620 .filter(|initial_char| initial_char.is_whitespace())
3621 .count(),
3622 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3623 );
3624
3625 init_test(cx, |s| {
3626 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3627 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3628 });
3629
3630 let actual_invisibles =
3631 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3632
3633 assert_eq!(expected_invisibles, actual_invisibles);
3634 }
3635
3636 #[gpui::test]
3637 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3638 init_test(cx, |s| {
3639 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3640 s.defaults.tab_size = NonZeroU32::new(4);
3641 });
3642
3643 for editor_mode_without_invisibles in [
3644 EditorMode::SingleLine,
3645 EditorMode::AutoHeight { max_lines: 100 },
3646 ] {
3647 let invisibles = collect_invisibles_from_new_editor(
3648 cx,
3649 editor_mode_without_invisibles,
3650 "\t\t\t| | a b",
3651 px(500.0),
3652 );
3653 assert!(invisibles.is_empty(),
3654 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3655 }
3656 }
3657
3658 #[gpui::test]
3659 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3660 let tab_size = 4;
3661 let input_text = "a\tbcd ".repeat(9);
3662 let repeated_invisibles = [
3663 Invisible::Tab {
3664 line_start_offset: 1,
3665 },
3666 Invisible::Whitespace {
3667 line_offset: tab_size as usize + 3,
3668 },
3669 Invisible::Whitespace {
3670 line_offset: tab_size as usize + 4,
3671 },
3672 Invisible::Whitespace {
3673 line_offset: tab_size as usize + 5,
3674 },
3675 ];
3676 let expected_invisibles = std::iter::once(repeated_invisibles)
3677 .cycle()
3678 .take(9)
3679 .flatten()
3680 .collect::<Vec<_>>();
3681 assert_eq!(
3682 expected_invisibles.len(),
3683 input_text
3684 .chars()
3685 .filter(|initial_char| initial_char.is_whitespace())
3686 .count(),
3687 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3688 );
3689 info!("Expected invisibles: {expected_invisibles:?}");
3690
3691 init_test(cx, |_| {});
3692
3693 // Put the same string with repeating whitespace pattern into editors of various size,
3694 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3695 let resize_step = 10.0;
3696 let mut editor_width = 200.0;
3697 while editor_width <= 1000.0 {
3698 update_test_language_settings(cx, |s| {
3699 s.defaults.tab_size = NonZeroU32::new(tab_size);
3700 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3701 s.defaults.preferred_line_length = Some(editor_width as u32);
3702 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3703 });
3704
3705 let actual_invisibles = collect_invisibles_from_new_editor(
3706 cx,
3707 EditorMode::Full,
3708 &input_text,
3709 px(editor_width),
3710 );
3711
3712 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3713 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3714 let mut i = 0;
3715 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3716 i = actual_index;
3717 match expected_invisibles.get(i) {
3718 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3719 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3720 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3721 _ => {
3722 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3723 }
3724 },
3725 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3726 }
3727 }
3728 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3729 assert!(
3730 missing_expected_invisibles.is_empty(),
3731 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3732 );
3733
3734 editor_width += resize_step;
3735 }
3736 }
3737
3738 fn collect_invisibles_from_new_editor(
3739 cx: &mut TestAppContext,
3740 editor_mode: EditorMode,
3741 input_text: &str,
3742 editor_width: Pixels,
3743 ) -> Vec<Invisible> {
3744 info!(
3745 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3746 editor_width.0
3747 );
3748 let window = cx.add_window(|cx| {
3749 let buffer = MultiBuffer::build_simple(&input_text, cx);
3750 Editor::new(editor_mode, buffer, None, cx)
3751 });
3752 let editor = window.root(cx).unwrap();
3753 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3754 let mut element = EditorElement::new(&editor, style);
3755 window
3756 .update(cx, |editor, cx| {
3757 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3758 editor.set_wrap_width(Some(editor_width), cx);
3759 })
3760 .unwrap();
3761 let layout_state = cx
3762 .update_window(window.into(), |_, cx| {
3763 element.compute_layout(
3764 Bounds {
3765 origin: point(px(500.), px(500.)),
3766 size: size(px(500.), px(500.)),
3767 },
3768 cx,
3769 )
3770 })
3771 .unwrap();
3772
3773 layout_state
3774 .position_map
3775 .line_layouts
3776 .iter()
3777 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3778 .flatten()
3779 .cloned()
3780 .collect()
3781 }
3782}
3783
3784pub fn register_action<T: Action>(
3785 view: &View<Editor>,
3786 cx: &mut WindowContext,
3787 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3788) {
3789 let view = view.clone();
3790 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3791 let action = action.downcast_ref().unwrap();
3792 if phase == DispatchPhase::Bubble {
3793 view.update(cx, |editor, cx| {
3794 listener(editor, action, cx);
3795 })
3796 }
3797 })
3798}
3799
3800fn compute_auto_height_layout(
3801 editor: &mut Editor,
3802 max_lines: usize,
3803 max_line_number_width: Pixels,
3804 known_dimensions: Size<Option<Pixels>>,
3805 cx: &mut ViewContext<Editor>,
3806) -> Option<Size<Pixels>> {
3807 let width = known_dimensions.width?;
3808 if let Some(height) = known_dimensions.height {
3809 return Some(size(width, height));
3810 }
3811
3812 let style = editor.style.as_ref().unwrap();
3813 let font_id = cx.text_system().resolve_font(&style.text.font());
3814 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3815 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3816 let em_width = cx
3817 .text_system()
3818 .typographic_bounds(font_id, font_size, 'm')
3819 .unwrap()
3820 .size
3821 .width;
3822
3823 let mut snapshot = editor.snapshot(cx);
3824 let gutter_width;
3825 let gutter_margin;
3826 if snapshot.show_gutter {
3827 let descent = cx.text_system().descent(font_id, font_size);
3828 let gutter_padding_factor = 3.5;
3829 let gutter_padding = (em_width * gutter_padding_factor).round();
3830 gutter_width = max_line_number_width + gutter_padding * 2.0;
3831 gutter_margin = -descent;
3832 } else {
3833 gutter_width = Pixels::ZERO;
3834 gutter_margin = Pixels::ZERO;
3835 };
3836
3837 editor.gutter_width = gutter_width;
3838 let text_width = width - gutter_width;
3839 let overscroll = size(em_width, px(0.));
3840
3841 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3842 if editor.set_wrap_width(Some(editor_width), cx) {
3843 snapshot = editor.snapshot(cx);
3844 }
3845
3846 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3847 let height = scroll_height
3848 .max(line_height)
3849 .min(line_height * max_lines as f32);
3850
3851 Some(size(width, height))
3852}