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
808 let start_y = start_row as f32 * line_height - scroll_top;
809 let end_y = end_row as f32 * line_height - scroll_top;
810
811 let width = 0.275 * line_height;
812 let highlight_origin = bounds.origin + point(-width, start_y);
813 let highlight_size = size(width * 2., end_y - start_y);
814 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
815 cx.paint_quad(quad(
816 highlight_bounds,
817 Corners::all(0.05 * line_height),
818 color,
819 Edges::default(),
820 transparent_black(),
821 ));
822 }
823 }
824
825 fn paint_text(
826 &mut self,
827 text_bounds: Bounds<Pixels>,
828 layout: &mut LayoutState,
829 cx: &mut WindowContext,
830 ) {
831 let start_row = layout.visible_display_row_range.start;
832 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
833 let line_end_overshoot = 0.15 * layout.position_map.line_height;
834 let whitespace_setting = self
835 .editor
836 .read(cx)
837 .buffer
838 .read(cx)
839 .settings_at(0, cx)
840 .show_whitespaces;
841
842 cx.with_content_mask(
843 Some(ContentMask {
844 bounds: text_bounds,
845 }),
846 |cx| {
847 let interactive_text_bounds = InteractiveBounds {
848 bounds: text_bounds,
849 stacking_order: cx.stacking_order().clone(),
850 };
851 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
852 if self
853 .editor
854 .read(cx)
855 .link_go_to_definition_state
856 .definitions
857 .is_empty()
858 {
859 cx.set_cursor_style(CursorStyle::IBeam);
860 } else {
861 cx.set_cursor_style(CursorStyle::PointingHand);
862 }
863 }
864
865 let fold_corner_radius = 0.15 * layout.position_map.line_height;
866 cx.with_element_id(Some("folds"), |cx| {
867 let snapshot = &layout.position_map.snapshot;
868 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
869 let fold_range = fold.range.clone();
870 let display_range = fold.range.start.to_display_point(&snapshot)
871 ..fold.range.end.to_display_point(&snapshot);
872 debug_assert_eq!(display_range.start.row(), display_range.end.row());
873 let row = display_range.start.row();
874
875 let line_layout = &layout.position_map.line_layouts
876 [(row - layout.visible_display_row_range.start) as usize]
877 .line;
878 let start_x = content_origin.x
879 + line_layout.x_for_index(display_range.start.column() as usize)
880 - layout.position_map.scroll_position.x;
881 let start_y = content_origin.y
882 + row as f32 * layout.position_map.line_height
883 - layout.position_map.scroll_position.y;
884 let end_x = content_origin.x
885 + line_layout.x_for_index(display_range.end.column() as usize)
886 - layout.position_map.scroll_position.x;
887
888 let fold_bounds = Bounds {
889 origin: point(start_x, start_y),
890 size: size(end_x - start_x, layout.position_map.line_height),
891 };
892
893 let fold_background = cx.with_z_index(1, |cx| {
894 div()
895 .id(fold.id)
896 .size_full()
897 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
898 .on_click(cx.listener_for(
899 &self.editor,
900 move |editor: &mut Editor, _, cx| {
901 editor.unfold_ranges(
902 [fold_range.start..fold_range.end],
903 true,
904 false,
905 cx,
906 );
907 cx.stop_propagation();
908 },
909 ))
910 .draw_and_update_state(
911 fold_bounds.origin,
912 fold_bounds.size,
913 cx,
914 |fold_element_state, cx| {
915 if fold_element_state.is_active() {
916 cx.theme().colors().ghost_element_active
917 } else if fold_bounds.contains(&cx.mouse_position()) {
918 cx.theme().colors().ghost_element_hover
919 } else {
920 cx.theme().colors().ghost_element_background
921 }
922 },
923 )
924 });
925
926 self.paint_highlighted_range(
927 display_range.clone(),
928 fold_background,
929 fold_corner_radius,
930 fold_corner_radius * 2.,
931 layout,
932 content_origin,
933 text_bounds,
934 cx,
935 );
936 }
937 });
938
939 for (range, color) in &layout.highlighted_ranges {
940 self.paint_highlighted_range(
941 range.clone(),
942 *color,
943 Pixels::ZERO,
944 line_end_overshoot,
945 layout,
946 content_origin,
947 text_bounds,
948 cx,
949 );
950 }
951
952 let mut cursors = SmallVec::<[Cursor; 32]>::new();
953 let corner_radius = 0.15 * layout.position_map.line_height;
954 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
955
956 for (selection_style, selections) in &layout.selections {
957 for selection in selections {
958 self.paint_highlighted_range(
959 selection.range.clone(),
960 selection_style.selection,
961 corner_radius,
962 corner_radius * 2.,
963 layout,
964 content_origin,
965 text_bounds,
966 cx,
967 );
968
969 if selection.is_local && !selection.range.is_empty() {
970 invisible_display_ranges.push(selection.range.clone());
971 }
972
973 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
974 let cursor_position = selection.head;
975 if layout
976 .visible_display_row_range
977 .contains(&cursor_position.row())
978 {
979 let cursor_row_layout = &layout.position_map.line_layouts
980 [(cursor_position.row() - start_row) as usize]
981 .line;
982 let cursor_column = cursor_position.column() as usize;
983
984 let cursor_character_x =
985 cursor_row_layout.x_for_index(cursor_column);
986 let mut block_width = cursor_row_layout
987 .x_for_index(cursor_column + 1)
988 - cursor_character_x;
989 if block_width == Pixels::ZERO {
990 block_width = layout.position_map.em_width;
991 }
992 let block_text = if let CursorShape::Block = selection.cursor_shape
993 {
994 layout
995 .position_map
996 .snapshot
997 .chars_at(cursor_position)
998 .next()
999 .and_then(|(character, _)| {
1000 // todo!() currently shape_line panics if text conatins newlines
1001 let text = if character == '\n' {
1002 SharedString::from(" ")
1003 } else {
1004 SharedString::from(character.to_string())
1005 };
1006 let len = text.len();
1007 cx.text_system()
1008 .shape_line(
1009 text,
1010 cursor_row_layout.font_size,
1011 &[TextRun {
1012 len,
1013 font: self.style.text.font(),
1014 color: self.style.background,
1015 background_color: None,
1016 underline: None,
1017 }],
1018 )
1019 .log_err()
1020 })
1021 } else {
1022 None
1023 };
1024
1025 let x = cursor_character_x - layout.position_map.scroll_position.x;
1026 let y = cursor_position.row() as f32
1027 * layout.position_map.line_height
1028 - layout.position_map.scroll_position.y;
1029 if selection.is_newest {
1030 self.editor.update(cx, |editor, _| {
1031 editor.pixel_position_of_newest_cursor = Some(point(
1032 text_bounds.origin.x + x + block_width / 2.,
1033 text_bounds.origin.y
1034 + y
1035 + layout.position_map.line_height / 2.,
1036 ))
1037 });
1038 }
1039 cursors.push(Cursor {
1040 color: selection_style.cursor,
1041 block_width,
1042 origin: point(x, y),
1043 line_height: layout.position_map.line_height,
1044 shape: selection.cursor_shape,
1045 block_text,
1046 });
1047 }
1048 }
1049 }
1050 }
1051
1052 for (ix, line_with_invisibles) in
1053 layout.position_map.line_layouts.iter().enumerate()
1054 {
1055 let row = start_row + ix as u32;
1056 line_with_invisibles.draw(
1057 layout,
1058 row,
1059 content_origin,
1060 whitespace_setting,
1061 &invisible_display_ranges,
1062 cx,
1063 )
1064 }
1065
1066 cx.with_z_index(0, |cx| {
1067 for cursor in cursors {
1068 cursor.paint(content_origin, cx);
1069 }
1070 });
1071 },
1072 )
1073 }
1074
1075 fn paint_overlays(
1076 &mut self,
1077 text_bounds: Bounds<Pixels>,
1078 layout: &mut LayoutState,
1079 cx: &mut WindowContext,
1080 ) {
1081 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1082 let start_row = layout.visible_display_row_range.start;
1083 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1084 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1085 let context_menu_size = context_menu.measure(available_space, cx);
1086
1087 let cursor_row_layout =
1088 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1089 let x = cursor_row_layout.x_for_index(position.column() as usize)
1090 - layout.position_map.scroll_position.x;
1091 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1092 - layout.position_map.scroll_position.y;
1093 let mut list_origin = content_origin + point(x, y);
1094 let list_width = context_menu_size.width;
1095 let list_height = context_menu_size.height;
1096
1097 // Snap the right edge of the list to the right edge of the window if
1098 // its horizontal bounds overflow.
1099 if list_origin.x + list_width > cx.viewport_size().width {
1100 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1101 }
1102
1103 if list_origin.y + list_height > text_bounds.lower_right().y {
1104 list_origin.y -= layout.position_map.line_height + list_height;
1105 }
1106
1107 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1108 }
1109
1110 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1111 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1112
1113 // This is safe because we check on layout whether the required row is available
1114 let hovered_row_layout =
1115 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1116
1117 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1118 // height. This is the size we will use to decide whether to render popovers above or below
1119 // the hovered line.
1120 let first_size = hover_popovers[0].measure(available_space, cx);
1121 let height_to_reserve =
1122 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1123
1124 // Compute Hovered Point
1125 let x = hovered_row_layout.x_for_index(position.column() as usize)
1126 - layout.position_map.scroll_position.x;
1127 let y = position.row() as f32 * layout.position_map.line_height
1128 - layout.position_map.scroll_position.y;
1129 let hovered_point = content_origin + point(x, y);
1130
1131 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1132 // There is enough space above. Render popovers above the hovered point
1133 let mut current_y = hovered_point.y;
1134 for mut hover_popover in hover_popovers {
1135 let size = hover_popover.measure(available_space, cx);
1136 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1137
1138 let x_out_of_bounds =
1139 text_bounds.upper_right().x - (popover_origin.x + size.width);
1140 if x_out_of_bounds < Pixels::ZERO {
1141 popover_origin.x = popover_origin.x + x_out_of_bounds;
1142 }
1143
1144 cx.break_content_mask(|cx| {
1145 hover_popover.draw(popover_origin, available_space, cx)
1146 });
1147
1148 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1149 }
1150 } else {
1151 // There is not enough space above. Render popovers below the hovered point
1152 let mut current_y = hovered_point.y + layout.position_map.line_height;
1153 for mut hover_popover in hover_popovers {
1154 let size = hover_popover.measure(available_space, cx);
1155 let mut popover_origin = point(hovered_point.x, current_y);
1156
1157 let x_out_of_bounds =
1158 text_bounds.upper_right().x - (popover_origin.x + size.width);
1159 if x_out_of_bounds < Pixels::ZERO {
1160 popover_origin.x = popover_origin.x + x_out_of_bounds;
1161 }
1162
1163 hover_popover.draw(popover_origin, available_space, cx);
1164
1165 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1166 }
1167 }
1168 }
1169
1170 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1171 let element = overlay()
1172 .position(mouse_context_menu.position)
1173 .child(mouse_context_menu.context_menu.clone())
1174 .anchor(AnchorCorner::TopLeft)
1175 .snap_to_window();
1176 element.into_any().draw(
1177 gpui::Point::default(),
1178 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1179 cx,
1180 );
1181 }
1182 }
1183
1184 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1185 bounds.upper_right().x - self.style.scrollbar_width
1186 }
1187
1188 fn paint_scrollbar(
1189 &mut self,
1190 bounds: Bounds<Pixels>,
1191 layout: &mut LayoutState,
1192 cx: &mut WindowContext,
1193 ) {
1194 if layout.mode != EditorMode::Full {
1195 return;
1196 }
1197
1198 // If a drag took place after we started dragging the scrollbar,
1199 // cancel the scrollbar drag.
1200 if cx.has_active_drag() {
1201 self.editor.update(cx, |editor, cx| {
1202 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1203 });
1204 }
1205
1206 let top = bounds.origin.y;
1207 let bottom = bounds.lower_left().y;
1208 let right = bounds.lower_right().x;
1209 let left = self.scrollbar_left(&bounds);
1210 let row_range = layout.scrollbar_row_range.clone();
1211 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1212
1213 let mut height = bounds.size.height;
1214 let mut first_row_y_offset = px(0.0);
1215
1216 // Impose a minimum height on the scrollbar thumb
1217 let row_height = height / max_row;
1218 let min_thumb_height = layout.position_map.line_height;
1219 let thumb_height = (row_range.end - row_range.start) * row_height;
1220 if thumb_height < min_thumb_height {
1221 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1222 height -= min_thumb_height - thumb_height;
1223 }
1224
1225 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1226
1227 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1228 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1229 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1230 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1231
1232 if layout.show_scrollbars {
1233 cx.paint_quad(quad(
1234 track_bounds,
1235 Corners::default(),
1236 cx.theme().colors().scrollbar_track_background,
1237 Edges {
1238 top: Pixels::ZERO,
1239 right: Pixels::ZERO,
1240 bottom: Pixels::ZERO,
1241 left: px(1.),
1242 },
1243 cx.theme().colors().scrollbar_track_border,
1244 ));
1245 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1246 if layout.is_singleton && scrollbar_settings.selections {
1247 let start_anchor = Anchor::min();
1248 let end_anchor = Anchor::max();
1249 let background_ranges = self
1250 .editor
1251 .read(cx)
1252 .background_highlight_row_ranges::<BufferSearchHighlights>(
1253 start_anchor..end_anchor,
1254 &layout.position_map.snapshot,
1255 50000,
1256 );
1257 for range in background_ranges {
1258 let start_y = y_for_row(range.start().row() as f32);
1259 let mut end_y = y_for_row(range.end().row() as f32);
1260 if end_y - start_y < px(1.) {
1261 end_y = start_y + px(1.);
1262 }
1263 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1264 cx.paint_quad(quad(
1265 bounds,
1266 Corners::default(),
1267 cx.theme().status().info,
1268 Edges {
1269 top: Pixels::ZERO,
1270 right: px(1.),
1271 bottom: Pixels::ZERO,
1272 left: px(1.),
1273 },
1274 cx.theme().colors().scrollbar_thumb_border,
1275 ));
1276 }
1277 }
1278
1279 if layout.is_singleton && scrollbar_settings.git_diff {
1280 for hunk in layout
1281 .position_map
1282 .snapshot
1283 .buffer_snapshot
1284 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1285 {
1286 let start_display = Point::new(hunk.buffer_range.start, 0)
1287 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1288 let end_display = Point::new(hunk.buffer_range.end, 0)
1289 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1290 let start_y = y_for_row(start_display.row() as f32);
1291 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1292 y_for_row((end_display.row() + 1) as f32)
1293 } else {
1294 y_for_row((end_display.row()) as f32)
1295 };
1296
1297 if end_y - start_y < px(1.) {
1298 end_y = start_y + px(1.);
1299 }
1300 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1301
1302 let color = match hunk.status() {
1303 DiffHunkStatus::Added => cx.theme().status().created,
1304 DiffHunkStatus::Modified => cx.theme().status().modified,
1305 DiffHunkStatus::Removed => cx.theme().status().deleted,
1306 };
1307 cx.paint_quad(quad(
1308 bounds,
1309 Corners::default(),
1310 color,
1311 Edges {
1312 top: Pixels::ZERO,
1313 right: px(1.),
1314 bottom: Pixels::ZERO,
1315 left: px(1.),
1316 },
1317 cx.theme().colors().scrollbar_thumb_border,
1318 ));
1319 }
1320 }
1321
1322 cx.paint_quad(quad(
1323 thumb_bounds,
1324 Corners::default(),
1325 cx.theme().colors().scrollbar_thumb_background,
1326 Edges {
1327 top: Pixels::ZERO,
1328 right: px(1.),
1329 bottom: Pixels::ZERO,
1330 left: px(1.),
1331 },
1332 cx.theme().colors().scrollbar_thumb_border,
1333 ));
1334 }
1335
1336 let interactive_track_bounds = InteractiveBounds {
1337 bounds: track_bounds,
1338 stacking_order: cx.stacking_order().clone(),
1339 };
1340 let mut mouse_position = cx.mouse_position();
1341 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1342 cx.set_cursor_style(CursorStyle::Arrow);
1343 }
1344
1345 cx.on_mouse_event({
1346 let editor = self.editor.clone();
1347 move |event: &MouseMoveEvent, phase, cx| {
1348 if phase == DispatchPhase::Capture {
1349 return;
1350 }
1351
1352 editor.update(cx, |editor, cx| {
1353 if event.pressed_button == Some(MouseButton::Left)
1354 && editor.scroll_manager.is_dragging_scrollbar()
1355 {
1356 let y = mouse_position.y;
1357 let new_y = event.position.y;
1358 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1359 let mut position = editor.scroll_position(cx);
1360 position.y += (new_y - y) * (max_row as f32) / height;
1361 if position.y < 0.0 {
1362 position.y = 0.0;
1363 }
1364 editor.set_scroll_position(position, cx);
1365 }
1366
1367 mouse_position = event.position;
1368 cx.stop_propagation();
1369 } else {
1370 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1371 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1372 editor.scroll_manager.show_scrollbar(cx);
1373 }
1374 }
1375 })
1376 }
1377 });
1378
1379 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1380 cx.on_mouse_event({
1381 let editor = self.editor.clone();
1382 move |_: &MouseUpEvent, phase, cx| {
1383 if phase == DispatchPhase::Capture {
1384 return;
1385 }
1386
1387 editor.update(cx, |editor, cx| {
1388 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1389 cx.stop_propagation();
1390 });
1391 }
1392 });
1393 } else {
1394 cx.on_mouse_event({
1395 let editor = self.editor.clone();
1396 move |event: &MouseDownEvent, phase, cx| {
1397 if phase == DispatchPhase::Capture {
1398 return;
1399 }
1400
1401 editor.update(cx, |editor, cx| {
1402 if track_bounds.contains(&event.position) {
1403 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1404
1405 let y = event.position.y;
1406 if y < thumb_top || thumb_bottom < y {
1407 let center_row =
1408 ((y - top) * max_row as f32 / height).round() as u32;
1409 let top_row = center_row
1410 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1411 let mut position = editor.scroll_position(cx);
1412 position.y = top_row as f32;
1413 editor.set_scroll_position(position, cx);
1414 } else {
1415 editor.scroll_manager.show_scrollbar(cx);
1416 }
1417
1418 cx.stop_propagation();
1419 }
1420 });
1421 }
1422 });
1423 }
1424 }
1425
1426 #[allow(clippy::too_many_arguments)]
1427 fn paint_highlighted_range(
1428 &self,
1429 range: Range<DisplayPoint>,
1430 color: Hsla,
1431 corner_radius: Pixels,
1432 line_end_overshoot: Pixels,
1433 layout: &LayoutState,
1434 content_origin: gpui::Point<Pixels>,
1435 bounds: Bounds<Pixels>,
1436 cx: &mut WindowContext,
1437 ) {
1438 let start_row = layout.visible_display_row_range.start;
1439 let end_row = layout.visible_display_row_range.end;
1440 if range.start != range.end {
1441 let row_range = if range.end.column() == 0 {
1442 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1443 } else {
1444 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1445 };
1446
1447 let highlighted_range = HighlightedRange {
1448 color,
1449 line_height: layout.position_map.line_height,
1450 corner_radius,
1451 start_y: content_origin.y
1452 + row_range.start as f32 * layout.position_map.line_height
1453 - layout.position_map.scroll_position.y,
1454 lines: row_range
1455 .into_iter()
1456 .map(|row| {
1457 let line_layout =
1458 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1459 HighlightedRangeLine {
1460 start_x: if row == range.start.row() {
1461 content_origin.x
1462 + line_layout.x_for_index(range.start.column() as usize)
1463 - layout.position_map.scroll_position.x
1464 } else {
1465 content_origin.x - layout.position_map.scroll_position.x
1466 },
1467 end_x: if row == range.end.row() {
1468 content_origin.x
1469 + line_layout.x_for_index(range.end.column() as usize)
1470 - layout.position_map.scroll_position.x
1471 } else {
1472 content_origin.x + line_layout.width + line_end_overshoot
1473 - layout.position_map.scroll_position.x
1474 },
1475 }
1476 })
1477 .collect(),
1478 };
1479
1480 highlighted_range.paint(bounds, cx);
1481 }
1482 }
1483
1484 fn paint_blocks(
1485 &mut self,
1486 bounds: Bounds<Pixels>,
1487 layout: &mut LayoutState,
1488 cx: &mut WindowContext,
1489 ) {
1490 let scroll_position = layout.position_map.snapshot.scroll_position();
1491 let scroll_left = scroll_position.x * layout.position_map.em_width;
1492 let scroll_top = scroll_position.y * layout.position_map.line_height;
1493
1494 for mut block in layout.blocks.drain(..) {
1495 let mut origin = bounds.origin
1496 + point(
1497 Pixels::ZERO,
1498 block.row as f32 * layout.position_map.line_height - scroll_top,
1499 );
1500 if !matches!(block.style, BlockStyle::Sticky) {
1501 origin += point(-scroll_left, Pixels::ZERO);
1502 }
1503 block.element.draw(origin, block.available_space, cx);
1504 }
1505 }
1506
1507 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1508 let style = &self.style;
1509 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1510 let layout = cx
1511 .text_system()
1512 .shape_line(
1513 SharedString::from(" ".repeat(column)),
1514 font_size,
1515 &[TextRun {
1516 len: column,
1517 font: style.text.font(),
1518 color: Hsla::default(),
1519 background_color: None,
1520 underline: None,
1521 }],
1522 )
1523 .unwrap();
1524
1525 layout.width
1526 }
1527
1528 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1529 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1530 self.column_pixels(digit_count, cx)
1531 }
1532
1533 //Folds contained in a hunk are ignored apart from shrinking visual size
1534 //If a fold contains any hunks then that fold line is marked as modified
1535 fn layout_git_gutters(
1536 &self,
1537 display_rows: Range<u32>,
1538 snapshot: &EditorSnapshot,
1539 ) -> Vec<DisplayDiffHunk> {
1540 let buffer_snapshot = &snapshot.buffer_snapshot;
1541
1542 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1543 .to_point(snapshot)
1544 .row;
1545 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1546 .to_point(snapshot)
1547 .row;
1548
1549 buffer_snapshot
1550 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1551 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1552 .dedup()
1553 .collect()
1554 }
1555
1556 fn calculate_relative_line_numbers(
1557 &self,
1558 snapshot: &EditorSnapshot,
1559 rows: &Range<u32>,
1560 relative_to: Option<u32>,
1561 ) -> HashMap<u32, u32> {
1562 let mut relative_rows: HashMap<u32, u32> = Default::default();
1563 let Some(relative_to) = relative_to else {
1564 return relative_rows;
1565 };
1566
1567 let start = rows.start.min(relative_to);
1568 let end = rows.end.max(relative_to);
1569
1570 let buffer_rows = snapshot
1571 .buffer_rows(start)
1572 .take(1 + (end - start) as usize)
1573 .collect::<Vec<_>>();
1574
1575 let head_idx = relative_to - start;
1576 let mut delta = 1;
1577 let mut i = head_idx + 1;
1578 while i < buffer_rows.len() as u32 {
1579 if buffer_rows[i as usize].is_some() {
1580 if rows.contains(&(i + start)) {
1581 relative_rows.insert(i + start, delta);
1582 }
1583 delta += 1;
1584 }
1585 i += 1;
1586 }
1587 delta = 1;
1588 i = head_idx.min(buffer_rows.len() as u32 - 1);
1589 while i > 0 && buffer_rows[i as usize].is_none() {
1590 i -= 1;
1591 }
1592
1593 while i > 0 {
1594 i -= 1;
1595 if buffer_rows[i as usize].is_some() {
1596 if rows.contains(&(i + start)) {
1597 relative_rows.insert(i + start, delta);
1598 }
1599 delta += 1;
1600 }
1601 }
1602
1603 relative_rows
1604 }
1605
1606 fn shape_line_numbers(
1607 &self,
1608 rows: Range<u32>,
1609 active_rows: &BTreeMap<u32, bool>,
1610 newest_selection_head: DisplayPoint,
1611 is_singleton: bool,
1612 snapshot: &EditorSnapshot,
1613 cx: &ViewContext<Editor>,
1614 ) -> (
1615 Vec<Option<ShapedLine>>,
1616 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1617 ) {
1618 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1619 let include_line_numbers = snapshot.mode == EditorMode::Full;
1620 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1621 let mut fold_statuses = Vec::with_capacity(rows.len());
1622 let mut line_number = String::new();
1623 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1624 let relative_to = if is_relative {
1625 Some(newest_selection_head.row())
1626 } else {
1627 None
1628 };
1629
1630 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1631
1632 for (ix, row) in snapshot
1633 .buffer_rows(rows.start)
1634 .take((rows.end - rows.start) as usize)
1635 .enumerate()
1636 {
1637 let display_row = rows.start + ix as u32;
1638 let (active, color) = if active_rows.contains_key(&display_row) {
1639 (true, cx.theme().colors().editor_active_line_number)
1640 } else {
1641 (false, cx.theme().colors().editor_line_number)
1642 };
1643 if let Some(buffer_row) = row {
1644 if include_line_numbers {
1645 line_number.clear();
1646 let default_number = buffer_row + 1;
1647 let number = relative_rows
1648 .get(&(ix as u32 + rows.start))
1649 .unwrap_or(&default_number);
1650 write!(&mut line_number, "{}", number).unwrap();
1651 let run = TextRun {
1652 len: line_number.len(),
1653 font: self.style.text.font(),
1654 color,
1655 background_color: None,
1656 underline: None,
1657 };
1658 let shaped_line = cx
1659 .text_system()
1660 .shape_line(line_number.clone().into(), font_size, &[run])
1661 .unwrap();
1662 shaped_line_numbers.push(Some(shaped_line));
1663 fold_statuses.push(
1664 is_singleton
1665 .then(|| {
1666 snapshot
1667 .fold_for_line(buffer_row)
1668 .map(|fold_status| (fold_status, buffer_row, active))
1669 })
1670 .flatten(),
1671 )
1672 }
1673 } else {
1674 fold_statuses.push(None);
1675 shaped_line_numbers.push(None);
1676 }
1677 }
1678
1679 (shaped_line_numbers, fold_statuses)
1680 }
1681
1682 fn layout_lines(
1683 &self,
1684 rows: Range<u32>,
1685 line_number_layouts: &[Option<ShapedLine>],
1686 snapshot: &EditorSnapshot,
1687 cx: &ViewContext<Editor>,
1688 ) -> Vec<LineWithInvisibles> {
1689 if rows.start >= rows.end {
1690 return Vec::new();
1691 }
1692
1693 // Show the placeholder when the editor is empty
1694 if snapshot.is_empty() {
1695 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1696 let placeholder_color = cx.theme().colors().text_placeholder;
1697 let placeholder_text = snapshot.placeholder_text();
1698
1699 let placeholder_lines = placeholder_text
1700 .as_ref()
1701 .map_or("", AsRef::as_ref)
1702 .split('\n')
1703 .skip(rows.start as usize)
1704 .chain(iter::repeat(""))
1705 .take(rows.len());
1706 placeholder_lines
1707 .filter_map(move |line| {
1708 let run = TextRun {
1709 len: line.len(),
1710 font: self.style.text.font(),
1711 color: placeholder_color,
1712 background_color: None,
1713 underline: Default::default(),
1714 };
1715 cx.text_system()
1716 .shape_line(line.to_string().into(), font_size, &[run])
1717 .log_err()
1718 })
1719 .map(|line| LineWithInvisibles {
1720 line,
1721 invisibles: Vec::new(),
1722 })
1723 .collect()
1724 } else {
1725 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1726 LineWithInvisibles::from_chunks(
1727 chunks,
1728 &self.style.text,
1729 MAX_LINE_LEN,
1730 rows.len() as usize,
1731 line_number_layouts,
1732 snapshot.mode,
1733 cx,
1734 )
1735 }
1736 }
1737
1738 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1739 self.editor.update(cx, |editor, cx| {
1740 let snapshot = editor.snapshot(cx);
1741 let style = self.style.clone();
1742
1743 let font_id = cx.text_system().resolve_font(&style.text.font());
1744 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1745 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1746 let em_width = cx
1747 .text_system()
1748 .typographic_bounds(font_id, font_size, 'm')
1749 .unwrap()
1750 .size
1751 .width;
1752 let em_advance = cx
1753 .text_system()
1754 .advance(font_id, font_size, 'm')
1755 .unwrap()
1756 .width;
1757
1758 let gutter_padding;
1759 let gutter_width;
1760 let gutter_margin;
1761 if snapshot.show_gutter {
1762 let descent = cx.text_system().descent(font_id, font_size);
1763
1764 let gutter_padding_factor = 3.5;
1765 gutter_padding = (em_width * gutter_padding_factor).round();
1766 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1767 gutter_margin = -descent;
1768 } else {
1769 gutter_padding = Pixels::ZERO;
1770 gutter_width = Pixels::ZERO;
1771 gutter_margin = Pixels::ZERO;
1772 };
1773
1774 editor.gutter_width = gutter_width;
1775
1776 let text_width = bounds.size.width - gutter_width;
1777 let overscroll = size(em_width, px(0.));
1778 let _snapshot = {
1779 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1780
1781 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1782 let wrap_width = match editor.soft_wrap_mode(cx) {
1783 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1784 SoftWrap::EditorWidth => editor_width,
1785 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1786 };
1787
1788 if editor.set_wrap_width(Some(wrap_width), cx) {
1789 editor.snapshot(cx)
1790 } else {
1791 snapshot
1792 }
1793 };
1794
1795 let wrap_guides = editor
1796 .wrap_guides(cx)
1797 .iter()
1798 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1799 .collect::<SmallVec<[_; 2]>>();
1800
1801 let gutter_size = size(gutter_width, bounds.size.height);
1802 let text_size = size(text_width, bounds.size.height);
1803
1804 let autoscroll_horizontally =
1805 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1806 let mut snapshot = editor.snapshot(cx);
1807
1808 let scroll_position = snapshot.scroll_position();
1809 // The scroll position is a fractional point, the whole number of which represents
1810 // the top of the window in terms of display rows.
1811 let start_row = scroll_position.y as u32;
1812 let height_in_lines = f32::from(bounds.size.height / line_height);
1813 let max_row = snapshot.max_point().row();
1814
1815 // Add 1 to ensure selections bleed off screen
1816 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1817
1818 let start_anchor = if start_row == 0 {
1819 Anchor::min()
1820 } else {
1821 snapshot
1822 .buffer_snapshot
1823 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1824 };
1825 let end_anchor = if end_row > max_row {
1826 Anchor::max()
1827 } else {
1828 snapshot
1829 .buffer_snapshot
1830 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1831 };
1832
1833 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1834 let mut active_rows = BTreeMap::new();
1835 let is_singleton = editor.is_singleton(cx);
1836
1837 let highlighted_rows = editor.highlighted_rows();
1838 let highlighted_ranges = editor.background_highlights_in_range(
1839 start_anchor..end_anchor,
1840 &snapshot.display_snapshot,
1841 cx.theme().colors(),
1842 );
1843
1844 let mut newest_selection_head = None;
1845
1846 if editor.show_local_selections {
1847 let mut local_selections: Vec<Selection<Point>> = editor
1848 .selections
1849 .disjoint_in_range(start_anchor..end_anchor, cx);
1850 local_selections.extend(editor.selections.pending(cx));
1851 let mut layouts = Vec::new();
1852 let newest = editor.selections.newest(cx);
1853 for selection in local_selections.drain(..) {
1854 let is_empty = selection.start == selection.end;
1855 let is_newest = selection == newest;
1856
1857 let layout = SelectionLayout::new(
1858 selection,
1859 editor.selections.line_mode,
1860 editor.cursor_shape,
1861 &snapshot.display_snapshot,
1862 is_newest,
1863 true,
1864 );
1865 if is_newest {
1866 newest_selection_head = Some(layout.head);
1867 }
1868
1869 for row in cmp::max(layout.active_rows.start, start_row)
1870 ..=cmp::min(layout.active_rows.end, end_row)
1871 {
1872 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1873 *contains_non_empty_selection |= !is_empty;
1874 }
1875 layouts.push(layout);
1876 }
1877
1878 let player = if editor.read_only(cx) {
1879 cx.theme().players().read_only()
1880 } else {
1881 style.local_player
1882 };
1883
1884 selections.push((player, layouts));
1885 }
1886
1887 if let Some(collaboration_hub) = &editor.collaboration_hub {
1888 // When following someone, render the local selections in their color.
1889 if let Some(leader_id) = editor.leader_peer_id {
1890 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1891 if let Some(participant_index) = collaboration_hub
1892 .user_participant_indices(cx)
1893 .get(&collaborator.user_id)
1894 {
1895 if let Some((local_selection_style, _)) = selections.first_mut() {
1896 *local_selection_style = cx
1897 .theme()
1898 .players()
1899 .color_for_participant(participant_index.0);
1900 }
1901 }
1902 }
1903 }
1904
1905 let mut remote_selections = HashMap::default();
1906 for selection in snapshot.remote_selections_in_range(
1907 &(start_anchor..end_anchor),
1908 collaboration_hub.as_ref(),
1909 cx,
1910 ) {
1911 let selection_style = if let Some(participant_index) = selection.participant_index {
1912 cx.theme()
1913 .players()
1914 .color_for_participant(participant_index.0)
1915 } else {
1916 cx.theme().players().absent()
1917 };
1918
1919 // Don't re-render the leader's selections, since the local selections
1920 // match theirs.
1921 if Some(selection.peer_id) == editor.leader_peer_id {
1922 continue;
1923 }
1924
1925 remote_selections
1926 .entry(selection.replica_id)
1927 .or_insert((selection_style, Vec::new()))
1928 .1
1929 .push(SelectionLayout::new(
1930 selection.selection,
1931 selection.line_mode,
1932 selection.cursor_shape,
1933 &snapshot.display_snapshot,
1934 false,
1935 false,
1936 ));
1937 }
1938
1939 selections.extend(remote_selections.into_values());
1940 }
1941
1942 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1943 let show_scrollbars = match scrollbar_settings.show {
1944 ShowScrollbar::Auto => {
1945 // Git
1946 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1947 ||
1948 // Selections
1949 (is_singleton && scrollbar_settings.selections && editor.has_background_highlights::<BufferSearchHighlights>())
1950 // Scrollmanager
1951 || editor.scroll_manager.scrollbars_visible()
1952 }
1953 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1954 ShowScrollbar::Always => true,
1955 ShowScrollbar::Never => false,
1956 };
1957
1958 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1959 let newest = editor.selections.newest::<Point>(cx);
1960 SelectionLayout::new(
1961 newest,
1962 editor.selections.line_mode,
1963 editor.cursor_shape,
1964 &snapshot.display_snapshot,
1965 true,
1966 true,
1967 )
1968 .head
1969 });
1970
1971 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1972 start_row..end_row,
1973 &active_rows,
1974 head_for_relative,
1975 is_singleton,
1976 &snapshot,
1977 cx,
1978 );
1979
1980 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1981
1982 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1983
1984 let mut max_visible_line_width = Pixels::ZERO;
1985 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1986 for line_with_invisibles in &line_layouts {
1987 if line_with_invisibles.line.width > max_visible_line_width {
1988 max_visible_line_width = line_with_invisibles.line.width;
1989 }
1990 }
1991
1992 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
1993 .unwrap()
1994 .width;
1995 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
1996
1997 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
1998 self.layout_blocks(
1999 start_row..end_row,
2000 &snapshot,
2001 bounds.size.width,
2002 scroll_width,
2003 gutter_padding,
2004 gutter_width,
2005 em_width,
2006 gutter_width + gutter_margin,
2007 line_height,
2008 &style,
2009 &line_layouts,
2010 editor,
2011 cx,
2012 )
2013 });
2014
2015 let scroll_max = point(
2016 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2017 max_row as f32,
2018 );
2019
2020 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2021
2022 let autoscrolled = if autoscroll_horizontally {
2023 editor.autoscroll_horizontally(
2024 start_row,
2025 text_size.width,
2026 scroll_width,
2027 em_width,
2028 &line_layouts,
2029 cx,
2030 )
2031 } else {
2032 false
2033 };
2034
2035 if clamped || autoscrolled {
2036 snapshot = editor.snapshot(cx);
2037 }
2038
2039 let mut context_menu = None;
2040 let mut code_actions_indicator = None;
2041 if let Some(newest_selection_head) = newest_selection_head {
2042 if (start_row..end_row).contains(&newest_selection_head.row()) {
2043 if editor.context_menu_visible() {
2044 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2045 context_menu =
2046 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2047 }
2048
2049 let active = matches!(
2050 editor.context_menu.read().as_ref(),
2051 Some(crate::ContextMenu::CodeActions(_))
2052 );
2053
2054 code_actions_indicator = editor
2055 .render_code_actions_indicator(&style, active, cx)
2056 .map(|element| CodeActionsIndicator {
2057 row: newest_selection_head.row(),
2058 button: element,
2059 });
2060 }
2061 }
2062
2063 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2064 let max_size = size(
2065 (120. * em_width) // Default size
2066 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2067 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2068 (16. * line_height) // Default size
2069 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2070 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2071 );
2072
2073 let hover = editor.hover_state.render(
2074 &snapshot,
2075 &style,
2076 visible_rows,
2077 max_size,
2078 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2079 cx,
2080 );
2081
2082 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2083 editor.render_fold_indicators(
2084 fold_statuses,
2085 &style,
2086 editor.gutter_hovered,
2087 line_height,
2088 gutter_margin,
2089 cx,
2090 )
2091 });
2092
2093 let invisible_symbol_font_size = font_size / 2.;
2094 let tab_invisible = cx
2095 .text_system()
2096 .shape_line(
2097 "→".into(),
2098 invisible_symbol_font_size,
2099 &[TextRun {
2100 len: "→".len(),
2101 font: self.style.text.font(),
2102 color: cx.theme().colors().editor_invisible,
2103 background_color: None,
2104 underline: None,
2105 }],
2106 )
2107 .unwrap();
2108 let space_invisible = cx
2109 .text_system()
2110 .shape_line(
2111 "•".into(),
2112 invisible_symbol_font_size,
2113 &[TextRun {
2114 len: "•".len(),
2115 font: self.style.text.font(),
2116 color: cx.theme().colors().editor_invisible,
2117 background_color: None,
2118 underline: None,
2119 }],
2120 )
2121 .unwrap();
2122
2123 LayoutState {
2124 mode: snapshot.mode,
2125 position_map: Arc::new(PositionMap {
2126 size: bounds.size,
2127 scroll_position: point(
2128 scroll_position.x * em_width,
2129 scroll_position.y * line_height,
2130 ),
2131 scroll_max,
2132 line_layouts,
2133 line_height,
2134 em_width,
2135 em_advance,
2136 snapshot,
2137 }),
2138 visible_anchor_range: start_anchor..end_anchor,
2139 visible_display_row_range: start_row..end_row,
2140 wrap_guides,
2141 gutter_size,
2142 gutter_padding,
2143 text_size,
2144 scrollbar_row_range,
2145 show_scrollbars,
2146 is_singleton,
2147 max_row,
2148 gutter_margin,
2149 active_rows,
2150 highlighted_rows,
2151 highlighted_ranges,
2152 line_numbers,
2153 display_hunks,
2154 blocks,
2155 selections,
2156 context_menu,
2157 code_actions_indicator,
2158 fold_indicators,
2159 tab_invisible,
2160 space_invisible,
2161 hover_popovers: hover,
2162 }
2163 })
2164 }
2165
2166 #[allow(clippy::too_many_arguments)]
2167 fn layout_blocks(
2168 &self,
2169 rows: Range<u32>,
2170 snapshot: &EditorSnapshot,
2171 editor_width: Pixels,
2172 scroll_width: Pixels,
2173 gutter_padding: Pixels,
2174 gutter_width: Pixels,
2175 em_width: Pixels,
2176 text_x: Pixels,
2177 line_height: Pixels,
2178 style: &EditorStyle,
2179 line_layouts: &[LineWithInvisibles],
2180 editor: &mut Editor,
2181 cx: &mut ViewContext<Editor>,
2182 ) -> (Pixels, Vec<BlockLayout>) {
2183 let mut block_id = 0;
2184 let (fixed_blocks, non_fixed_blocks) = snapshot
2185 .blocks_in_range(rows.clone())
2186 .partition::<Vec<_>, _>(|(_, block)| match block {
2187 TransformBlock::ExcerptHeader { .. } => false,
2188 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2189 });
2190
2191 let render_block = |block: &TransformBlock,
2192 available_space: Size<AvailableSpace>,
2193 block_id: usize,
2194 editor: &mut Editor,
2195 cx: &mut ViewContext<Editor>| {
2196 let mut element = match block {
2197 TransformBlock::Custom(block) => {
2198 let align_to = block
2199 .position()
2200 .to_point(&snapshot.buffer_snapshot)
2201 .to_display_point(snapshot);
2202 let anchor_x = text_x
2203 + if rows.contains(&align_to.row()) {
2204 line_layouts[(align_to.row() - rows.start) as usize]
2205 .line
2206 .x_for_index(align_to.column() as usize)
2207 } else {
2208 layout_line(align_to.row(), snapshot, style, cx)
2209 .unwrap()
2210 .x_for_index(align_to.column() as usize)
2211 };
2212
2213 block.render(&mut BlockContext {
2214 view_context: cx,
2215 anchor_x,
2216 gutter_padding,
2217 line_height,
2218 gutter_width,
2219 em_width,
2220 block_id,
2221 editor_style: &self.style,
2222 })
2223 }
2224
2225 TransformBlock::ExcerptHeader {
2226 buffer,
2227 range,
2228 starts_new_buffer,
2229 ..
2230 } => {
2231 let include_root = editor
2232 .project
2233 .as_ref()
2234 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2235 .unwrap_or_default();
2236
2237 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2238 let jump_path = ProjectPath {
2239 worktree_id: file.worktree_id(cx),
2240 path: file.path.clone(),
2241 };
2242 let jump_anchor = range
2243 .primary
2244 .as_ref()
2245 .map_or(range.context.start, |primary| primary.start);
2246 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2247
2248 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2249 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2250 });
2251
2252 jump_handler
2253 });
2254
2255 let element = if *starts_new_buffer {
2256 let path = buffer.resolve_file_path(cx, include_root);
2257 let mut filename = None;
2258 let mut parent_path = None;
2259 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2260 if let Some(path) = path {
2261 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2262 parent_path = path
2263 .parent()
2264 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2265 }
2266
2267 div()
2268 .id(("path header container", block_id))
2269 .size_full()
2270 .p_1p5()
2271 .child(
2272 h_stack()
2273 .id("path header block")
2274 .py_1p5()
2275 .pl_3()
2276 .pr_2()
2277 .rounded_lg()
2278 .shadow_md()
2279 .border()
2280 .border_color(cx.theme().colors().border)
2281 .bg(cx.theme().colors().editor_subheader_background)
2282 .justify_between()
2283 .hover(|style| style.bg(cx.theme().colors().element_hover))
2284 .child(
2285 h_stack().gap_3().child(
2286 h_stack()
2287 .gap_2()
2288 .child(
2289 filename
2290 .map(SharedString::from)
2291 .unwrap_or_else(|| "untitled".into()),
2292 )
2293 .when_some(parent_path, |then, path| {
2294 then.child(
2295 div().child(path).text_color(
2296 cx.theme().colors().text_muted,
2297 ),
2298 )
2299 }),
2300 ),
2301 )
2302 .when_some(jump_handler, |this, jump_handler| {
2303 this.cursor_pointer()
2304 .tooltip(|cx| {
2305 Tooltip::for_action(
2306 "Jump to Buffer",
2307 &OpenExcerpts,
2308 cx,
2309 )
2310 })
2311 .on_mouse_down(MouseButton::Left, |_, cx| {
2312 cx.stop_propagation()
2313 })
2314 .on_click(jump_handler)
2315 }),
2316 )
2317 } else {
2318 h_stack()
2319 .id(("collapsed context", block_id))
2320 .size_full()
2321 .gap(gutter_padding)
2322 .child(
2323 h_stack()
2324 .justify_end()
2325 .flex_none()
2326 .w(gutter_width - gutter_padding)
2327 .h_full()
2328 .text_buffer(cx)
2329 .text_color(cx.theme().colors().editor_line_number)
2330 .child("..."),
2331 )
2332 .map(|this| {
2333 if let Some(jump_handler) = jump_handler {
2334 this.child(
2335 ButtonLike::new("jump to collapsed context")
2336 .style(ButtonStyle::Transparent)
2337 .full_width()
2338 .on_click(jump_handler)
2339 .tooltip(|cx| {
2340 Tooltip::for_action(
2341 "Jump to Buffer",
2342 &OpenExcerpts,
2343 cx,
2344 )
2345 })
2346 .child(
2347 div()
2348 .h_px()
2349 .w_full()
2350 .bg(cx.theme().colors().border_variant)
2351 .group_hover("", |style| {
2352 style.bg(cx.theme().colors().border)
2353 }),
2354 ),
2355 )
2356 } else {
2357 this.child(div().size_full().bg(gpui::green()))
2358 }
2359 })
2360 };
2361 element.into_any()
2362 }
2363 };
2364
2365 let size = element.measure(available_space, cx);
2366 (element, size)
2367 };
2368
2369 let mut fixed_block_max_width = Pixels::ZERO;
2370 let mut blocks = Vec::new();
2371 for (row, block) in fixed_blocks {
2372 let available_space = size(
2373 AvailableSpace::MinContent,
2374 AvailableSpace::Definite(block.height() as f32 * line_height),
2375 );
2376 let (element, element_size) =
2377 render_block(block, available_space, block_id, editor, cx);
2378 block_id += 1;
2379 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2380 blocks.push(BlockLayout {
2381 row,
2382 element,
2383 available_space,
2384 style: BlockStyle::Fixed,
2385 });
2386 }
2387 for (row, block) in non_fixed_blocks {
2388 let style = match block {
2389 TransformBlock::Custom(block) => block.style(),
2390 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2391 };
2392 let width = match style {
2393 BlockStyle::Sticky => editor_width,
2394 BlockStyle::Flex => editor_width
2395 .max(fixed_block_max_width)
2396 .max(gutter_width + scroll_width),
2397 BlockStyle::Fixed => unreachable!(),
2398 };
2399 let available_space = size(
2400 AvailableSpace::Definite(width),
2401 AvailableSpace::Definite(block.height() as f32 * line_height),
2402 );
2403 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2404 block_id += 1;
2405 blocks.push(BlockLayout {
2406 row,
2407 element,
2408 available_space,
2409 style,
2410 });
2411 }
2412 (
2413 scroll_width.max(fixed_block_max_width - gutter_width),
2414 blocks,
2415 )
2416 }
2417
2418 fn paint_scroll_wheel_listener(
2419 &mut self,
2420 interactive_bounds: &InteractiveBounds,
2421 layout: &LayoutState,
2422 cx: &mut WindowContext,
2423 ) {
2424 cx.on_mouse_event({
2425 let position_map = layout.position_map.clone();
2426 let editor = self.editor.clone();
2427 let interactive_bounds = interactive_bounds.clone();
2428 let mut delta = ScrollDelta::default();
2429
2430 move |event: &ScrollWheelEvent, phase, cx| {
2431 if phase == DispatchPhase::Bubble
2432 && interactive_bounds.visibly_contains(&event.position, cx)
2433 {
2434 delta = delta.coalesce(event.delta);
2435 editor.update(cx, |editor, cx| {
2436 let position = event.position;
2437 let position_map: &PositionMap = &position_map;
2438 let bounds = &interactive_bounds;
2439 if !bounds.visibly_contains(&position, cx) {
2440 return;
2441 }
2442
2443 let line_height = position_map.line_height;
2444 let max_glyph_width = position_map.em_width;
2445 let (delta, axis) = match delta {
2446 gpui::ScrollDelta::Pixels(mut pixels) => {
2447 //Trackpad
2448 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
2449 (pixels, axis)
2450 }
2451
2452 gpui::ScrollDelta::Lines(lines) => {
2453 //Not trackpad
2454 let pixels =
2455 point(lines.x * max_glyph_width, lines.y * line_height);
2456 (pixels, None)
2457 }
2458 };
2459
2460 let scroll_position = position_map.snapshot.scroll_position();
2461 let x = f32::from(
2462 (scroll_position.x * max_glyph_width - delta.x) / max_glyph_width,
2463 );
2464 let y =
2465 f32::from((scroll_position.y * line_height - delta.y) / line_height);
2466 let scroll_position =
2467 point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
2468 editor.scroll(scroll_position, axis, cx);
2469 cx.stop_propagation();
2470 });
2471 }
2472 }
2473 });
2474 }
2475
2476 fn paint_mouse_listeners(
2477 &mut self,
2478 bounds: Bounds<Pixels>,
2479 gutter_bounds: Bounds<Pixels>,
2480 text_bounds: Bounds<Pixels>,
2481 layout: &LayoutState,
2482 cx: &mut WindowContext,
2483 ) {
2484 let interactive_bounds = InteractiveBounds {
2485 bounds: bounds.intersect(&cx.content_mask().bounds),
2486 stacking_order: cx.stacking_order().clone(),
2487 };
2488
2489 self.paint_scroll_wheel_listener(&interactive_bounds, layout, cx);
2490
2491 cx.on_mouse_event({
2492 let position_map = layout.position_map.clone();
2493 let editor = self.editor.clone();
2494 let stacking_order = cx.stacking_order().clone();
2495 let interactive_bounds = interactive_bounds.clone();
2496
2497 move |event: &MouseDownEvent, phase, cx| {
2498 if phase == DispatchPhase::Bubble
2499 && interactive_bounds.visibly_contains(&event.position, cx)
2500 {
2501 match event.button {
2502 MouseButton::Left => editor.update(cx, |editor, cx| {
2503 Self::mouse_left_down(
2504 editor,
2505 event,
2506 &position_map,
2507 text_bounds,
2508 gutter_bounds,
2509 &stacking_order,
2510 cx,
2511 );
2512 }),
2513 MouseButton::Right => editor.update(cx, |editor, cx| {
2514 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2515 }),
2516 _ => {}
2517 };
2518 }
2519 }
2520 });
2521
2522 cx.on_mouse_event({
2523 let position_map = layout.position_map.clone();
2524 let editor = self.editor.clone();
2525 let stacking_order = cx.stacking_order().clone();
2526 let interactive_bounds = interactive_bounds.clone();
2527
2528 move |event: &MouseUpEvent, phase, cx| {
2529 if phase == DispatchPhase::Bubble
2530 && interactive_bounds.visibly_contains(&event.position, cx)
2531 {
2532 editor.update(cx, |editor, cx| {
2533 Self::mouse_up(
2534 editor,
2535 event,
2536 &position_map,
2537 text_bounds,
2538 &stacking_order,
2539 cx,
2540 )
2541 });
2542 }
2543 }
2544 });
2545 cx.on_mouse_event({
2546 let position_map = layout.position_map.clone();
2547 let editor = self.editor.clone();
2548 let stacking_order = cx.stacking_order().clone();
2549
2550 move |event: &MouseMoveEvent, phase, cx| {
2551 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2552
2553 if phase == DispatchPhase::Bubble {
2554 editor.update(cx, |editor, cx| {
2555 if event.pressed_button == Some(MouseButton::Left) {
2556 Self::mouse_dragged(
2557 editor,
2558 event,
2559 &position_map,
2560 text_bounds,
2561 gutter_bounds,
2562 &stacking_order,
2563 cx,
2564 )
2565 }
2566
2567 if interactive_bounds.visibly_contains(&event.position, cx) {
2568 Self::mouse_moved(
2569 editor,
2570 event,
2571 &position_map,
2572 text_bounds,
2573 gutter_bounds,
2574 &stacking_order,
2575 cx,
2576 )
2577 }
2578 });
2579 }
2580 }
2581 });
2582 }
2583}
2584
2585#[derive(Debug)]
2586pub struct LineWithInvisibles {
2587 pub line: ShapedLine,
2588 invisibles: Vec<Invisible>,
2589}
2590
2591impl LineWithInvisibles {
2592 fn from_chunks<'a>(
2593 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2594 text_style: &TextStyle,
2595 max_line_len: usize,
2596 max_line_count: usize,
2597 line_number_layouts: &[Option<ShapedLine>],
2598 editor_mode: EditorMode,
2599 cx: &WindowContext,
2600 ) -> Vec<Self> {
2601 let mut layouts = Vec::with_capacity(max_line_count);
2602 let mut line = String::new();
2603 let mut invisibles = Vec::new();
2604 let mut styles = Vec::new();
2605 let mut non_whitespace_added = false;
2606 let mut row = 0;
2607 let mut line_exceeded_max_len = false;
2608 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2609
2610 for highlighted_chunk in chunks.chain([HighlightedChunk {
2611 chunk: "\n",
2612 style: None,
2613 is_tab: false,
2614 }]) {
2615 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2616 if ix > 0 {
2617 let shaped_line = cx
2618 .text_system()
2619 .shape_line(line.clone().into(), font_size, &styles)
2620 .unwrap();
2621 layouts.push(Self {
2622 line: shaped_line,
2623 invisibles: invisibles.drain(..).collect(),
2624 });
2625
2626 line.clear();
2627 styles.clear();
2628 row += 1;
2629 line_exceeded_max_len = false;
2630 non_whitespace_added = false;
2631 if row == max_line_count {
2632 return layouts;
2633 }
2634 }
2635
2636 if !line_chunk.is_empty() && !line_exceeded_max_len {
2637 let text_style = if let Some(style) = highlighted_chunk.style {
2638 Cow::Owned(text_style.clone().highlight(style))
2639 } else {
2640 Cow::Borrowed(text_style)
2641 };
2642
2643 if line.len() + line_chunk.len() > max_line_len {
2644 let mut chunk_len = max_line_len - line.len();
2645 while !line_chunk.is_char_boundary(chunk_len) {
2646 chunk_len -= 1;
2647 }
2648 line_chunk = &line_chunk[..chunk_len];
2649 line_exceeded_max_len = true;
2650 }
2651
2652 styles.push(TextRun {
2653 len: line_chunk.len(),
2654 font: text_style.font(),
2655 color: text_style.color,
2656 background_color: text_style.background_color,
2657 underline: text_style.underline,
2658 });
2659
2660 if editor_mode == EditorMode::Full {
2661 // Line wrap pads its contents with fake whitespaces,
2662 // avoid printing them
2663 let inside_wrapped_string = line_number_layouts
2664 .get(row)
2665 .and_then(|layout| layout.as_ref())
2666 .is_none();
2667 if highlighted_chunk.is_tab {
2668 if non_whitespace_added || !inside_wrapped_string {
2669 invisibles.push(Invisible::Tab {
2670 line_start_offset: line.len(),
2671 });
2672 }
2673 } else {
2674 invisibles.extend(
2675 line_chunk
2676 .chars()
2677 .enumerate()
2678 .filter(|(_, line_char)| {
2679 let is_whitespace = line_char.is_whitespace();
2680 non_whitespace_added |= !is_whitespace;
2681 is_whitespace
2682 && (non_whitespace_added || !inside_wrapped_string)
2683 })
2684 .map(|(whitespace_index, _)| Invisible::Whitespace {
2685 line_offset: line.len() + whitespace_index,
2686 }),
2687 )
2688 }
2689 }
2690
2691 line.push_str(line_chunk);
2692 }
2693 }
2694 }
2695
2696 layouts
2697 }
2698
2699 fn draw(
2700 &self,
2701 layout: &LayoutState,
2702 row: u32,
2703 content_origin: gpui::Point<Pixels>,
2704 whitespace_setting: ShowWhitespaceSetting,
2705 selection_ranges: &[Range<DisplayPoint>],
2706 cx: &mut WindowContext,
2707 ) {
2708 let line_height = layout.position_map.line_height;
2709 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2710
2711 self.line
2712 .paint(
2713 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2714 line_height,
2715 cx,
2716 )
2717 .log_err();
2718
2719 self.draw_invisibles(
2720 &selection_ranges,
2721 layout,
2722 content_origin,
2723 line_y,
2724 row,
2725 line_height,
2726 whitespace_setting,
2727 cx,
2728 );
2729 }
2730
2731 fn draw_invisibles(
2732 &self,
2733 selection_ranges: &[Range<DisplayPoint>],
2734 layout: &LayoutState,
2735 content_origin: gpui::Point<Pixels>,
2736 line_y: Pixels,
2737 row: u32,
2738 line_height: Pixels,
2739 whitespace_setting: ShowWhitespaceSetting,
2740 cx: &mut WindowContext,
2741 ) {
2742 let allowed_invisibles_regions = match whitespace_setting {
2743 ShowWhitespaceSetting::None => return,
2744 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2745 ShowWhitespaceSetting::All => None,
2746 };
2747
2748 for invisible in &self.invisibles {
2749 let (&token_offset, invisible_symbol) = match invisible {
2750 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2751 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2752 };
2753
2754 let x_offset = self.line.x_for_index(token_offset);
2755 let invisible_offset =
2756 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2757 let origin = content_origin
2758 + gpui::point(
2759 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2760 line_y,
2761 );
2762
2763 if let Some(allowed_regions) = allowed_invisibles_regions {
2764 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2765 if !allowed_regions
2766 .iter()
2767 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2768 {
2769 continue;
2770 }
2771 }
2772 invisible_symbol.paint(origin, line_height, cx).log_err();
2773 }
2774 }
2775}
2776
2777#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2778enum Invisible {
2779 Tab { line_start_offset: usize },
2780 Whitespace { line_offset: usize },
2781}
2782
2783impl Element for EditorElement {
2784 type State = ();
2785
2786 fn request_layout(
2787 &mut self,
2788 _element_state: Option<Self::State>,
2789 cx: &mut gpui::WindowContext,
2790 ) -> (gpui::LayoutId, Self::State) {
2791 self.editor.update(cx, |editor, cx| {
2792 editor.set_style(self.style.clone(), cx);
2793
2794 let layout_id = match editor.mode {
2795 EditorMode::SingleLine => {
2796 let rem_size = cx.rem_size();
2797 let mut style = Style::default();
2798 style.size.width = relative(1.).into();
2799 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2800 cx.request_layout(&style, None)
2801 }
2802 EditorMode::AutoHeight { max_lines } => {
2803 let editor_handle = cx.view().clone();
2804 let max_line_number_width =
2805 self.max_line_number_width(&editor.snapshot(cx), cx);
2806 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2807 editor_handle
2808 .update(cx, |editor, cx| {
2809 compute_auto_height_layout(
2810 editor,
2811 max_lines,
2812 max_line_number_width,
2813 known_dimensions,
2814 cx,
2815 )
2816 })
2817 .unwrap_or_default()
2818 })
2819 }
2820 EditorMode::Full => {
2821 let mut style = Style::default();
2822 style.size.width = relative(1.).into();
2823 style.size.height = relative(1.).into();
2824 cx.request_layout(&style, None)
2825 }
2826 };
2827
2828 (layout_id, ())
2829 })
2830 }
2831
2832 fn paint(
2833 &mut self,
2834 bounds: Bounds<gpui::Pixels>,
2835 _element_state: &mut Self::State,
2836 cx: &mut gpui::WindowContext,
2837 ) {
2838 let editor = self.editor.clone();
2839
2840 cx.with_text_style(
2841 Some(gpui::TextStyleRefinement {
2842 font_size: Some(self.style.text.font_size),
2843 ..Default::default()
2844 }),
2845 |cx| {
2846 let mut layout = self.compute_layout(bounds, cx);
2847 let gutter_bounds = Bounds {
2848 origin: bounds.origin,
2849 size: layout.gutter_size,
2850 };
2851 let text_bounds = Bounds {
2852 origin: gutter_bounds.upper_right(),
2853 size: layout.text_size,
2854 };
2855
2856 let focus_handle = editor.focus_handle(cx);
2857 let key_context = self.editor.read(cx).key_context(cx);
2858 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2859 self.register_actions(cx);
2860 self.register_key_listeners(cx);
2861
2862 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2863 let input_handler =
2864 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2865 cx.handle_input(&focus_handle, input_handler);
2866
2867 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2868 if layout.gutter_size.width > Pixels::ZERO {
2869 self.paint_gutter(gutter_bounds, &mut layout, cx);
2870 }
2871 self.paint_text(text_bounds, &mut layout, cx);
2872
2873 cx.with_z_index(0, |cx| {
2874 self.paint_mouse_listeners(
2875 bounds,
2876 gutter_bounds,
2877 text_bounds,
2878 &layout,
2879 cx,
2880 );
2881 });
2882 if !layout.blocks.is_empty() {
2883 cx.with_z_index(0, |cx| {
2884 cx.with_element_id(Some("editor_blocks"), |cx| {
2885 self.paint_blocks(bounds, &mut layout, cx);
2886 });
2887 })
2888 }
2889
2890 cx.with_z_index(1, |cx| {
2891 self.paint_overlays(text_bounds, &mut layout, cx);
2892 });
2893
2894 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2895 });
2896 })
2897 },
2898 );
2899 }
2900}
2901
2902impl IntoElement for EditorElement {
2903 type Element = Self;
2904
2905 fn element_id(&self) -> Option<gpui::ElementId> {
2906 self.editor.element_id()
2907 }
2908
2909 fn into_element(self) -> Self::Element {
2910 self
2911 }
2912}
2913
2914type BufferRow = u32;
2915
2916pub struct LayoutState {
2917 position_map: Arc<PositionMap>,
2918 gutter_size: Size<Pixels>,
2919 gutter_padding: Pixels,
2920 gutter_margin: Pixels,
2921 text_size: gpui::Size<Pixels>,
2922 mode: EditorMode,
2923 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2924 visible_anchor_range: Range<Anchor>,
2925 visible_display_row_range: Range<u32>,
2926 active_rows: BTreeMap<u32, bool>,
2927 highlighted_rows: Option<Range<u32>>,
2928 line_numbers: Vec<Option<ShapedLine>>,
2929 display_hunks: Vec<DisplayDiffHunk>,
2930 blocks: Vec<BlockLayout>,
2931 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2932 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2933 scrollbar_row_range: Range<f32>,
2934 show_scrollbars: bool,
2935 is_singleton: bool,
2936 max_row: u32,
2937 context_menu: Option<(DisplayPoint, AnyElement)>,
2938 code_actions_indicator: Option<CodeActionsIndicator>,
2939 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2940 fold_indicators: Vec<Option<IconButton>>,
2941 tab_invisible: ShapedLine,
2942 space_invisible: ShapedLine,
2943}
2944
2945struct CodeActionsIndicator {
2946 row: u32,
2947 button: IconButton,
2948}
2949
2950struct PositionMap {
2951 size: Size<Pixels>,
2952 line_height: Pixels,
2953 scroll_position: gpui::Point<Pixels>,
2954 scroll_max: gpui::Point<f32>,
2955 em_width: Pixels,
2956 em_advance: Pixels,
2957 line_layouts: Vec<LineWithInvisibles>,
2958 snapshot: EditorSnapshot,
2959}
2960
2961#[derive(Debug, Copy, Clone)]
2962pub struct PointForPosition {
2963 pub previous_valid: DisplayPoint,
2964 pub next_valid: DisplayPoint,
2965 pub exact_unclipped: DisplayPoint,
2966 pub column_overshoot_after_line_end: u32,
2967}
2968
2969impl PointForPosition {
2970 #[cfg(test)]
2971 pub fn valid(valid: DisplayPoint) -> Self {
2972 Self {
2973 previous_valid: valid,
2974 next_valid: valid,
2975 exact_unclipped: valid,
2976 column_overshoot_after_line_end: 0,
2977 }
2978 }
2979
2980 pub fn as_valid(&self) -> Option<DisplayPoint> {
2981 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2982 Some(self.previous_valid)
2983 } else {
2984 None
2985 }
2986 }
2987}
2988
2989impl PositionMap {
2990 fn point_for_position(
2991 &self,
2992 text_bounds: Bounds<Pixels>,
2993 position: gpui::Point<Pixels>,
2994 ) -> PointForPosition {
2995 let scroll_position = self.snapshot.scroll_position();
2996 let position = position - text_bounds.origin;
2997 let y = position.y.max(px(0.)).min(self.size.height);
2998 let x = position.x + (scroll_position.x * self.em_width);
2999 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3000
3001 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3002 .line_layouts
3003 .get(row as usize - scroll_position.y as usize)
3004 .map(|&LineWithInvisibles { ref line, .. }| line)
3005 {
3006 if let Some(ix) = line.index_for_x(x) {
3007 (ix as u32, px(0.))
3008 } else {
3009 (line.len as u32, px(0.).max(x - line.width))
3010 }
3011 } else {
3012 (0, x)
3013 };
3014
3015 let mut exact_unclipped = DisplayPoint::new(row, column);
3016 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3017 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3018
3019 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3020 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3021 PointForPosition {
3022 previous_valid,
3023 next_valid,
3024 exact_unclipped,
3025 column_overshoot_after_line_end,
3026 }
3027 }
3028}
3029
3030struct BlockLayout {
3031 row: u32,
3032 element: AnyElement,
3033 available_space: Size<AvailableSpace>,
3034 style: BlockStyle,
3035}
3036
3037fn layout_line(
3038 row: u32,
3039 snapshot: &EditorSnapshot,
3040 style: &EditorStyle,
3041 cx: &WindowContext,
3042) -> Result<ShapedLine> {
3043 let mut line = snapshot.line(row);
3044
3045 if line.len() > MAX_LINE_LEN {
3046 let mut len = MAX_LINE_LEN;
3047 while !line.is_char_boundary(len) {
3048 len -= 1;
3049 }
3050
3051 line.truncate(len);
3052 }
3053
3054 cx.text_system().shape_line(
3055 line.into(),
3056 style.text.font_size.to_pixels(cx.rem_size()),
3057 &[TextRun {
3058 len: snapshot.line_len(row) as usize,
3059 font: style.text.font(),
3060 color: Hsla::default(),
3061 background_color: None,
3062 underline: None,
3063 }],
3064 )
3065}
3066
3067#[derive(Debug)]
3068pub struct Cursor {
3069 origin: gpui::Point<Pixels>,
3070 block_width: Pixels,
3071 line_height: Pixels,
3072 color: Hsla,
3073 shape: CursorShape,
3074 block_text: Option<ShapedLine>,
3075}
3076
3077impl Cursor {
3078 pub fn new(
3079 origin: gpui::Point<Pixels>,
3080 block_width: Pixels,
3081 line_height: Pixels,
3082 color: Hsla,
3083 shape: CursorShape,
3084 block_text: Option<ShapedLine>,
3085 ) -> Cursor {
3086 Cursor {
3087 origin,
3088 block_width,
3089 line_height,
3090 color,
3091 shape,
3092 block_text,
3093 }
3094 }
3095
3096 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3097 Bounds {
3098 origin: self.origin + origin,
3099 size: size(self.block_width, self.line_height),
3100 }
3101 }
3102
3103 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3104 let bounds = match self.shape {
3105 CursorShape::Bar => Bounds {
3106 origin: self.origin + origin,
3107 size: size(px(2.0), self.line_height),
3108 },
3109 CursorShape::Block | CursorShape::Hollow => Bounds {
3110 origin: self.origin + origin,
3111 size: size(self.block_width, self.line_height),
3112 },
3113 CursorShape::Underscore => Bounds {
3114 origin: self.origin
3115 + origin
3116 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3117 size: size(self.block_width, px(2.0)),
3118 },
3119 };
3120
3121 //Draw background or border quad
3122 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3123 outline(bounds, self.color)
3124 } else {
3125 fill(bounds, self.color)
3126 };
3127
3128 cx.paint_quad(cursor);
3129
3130 if let Some(block_text) = &self.block_text {
3131 block_text
3132 .paint(self.origin + origin, self.line_height, cx)
3133 .log_err();
3134 }
3135 }
3136
3137 pub fn shape(&self) -> CursorShape {
3138 self.shape
3139 }
3140}
3141
3142#[derive(Debug)]
3143pub struct HighlightedRange {
3144 pub start_y: Pixels,
3145 pub line_height: Pixels,
3146 pub lines: Vec<HighlightedRangeLine>,
3147 pub color: Hsla,
3148 pub corner_radius: Pixels,
3149}
3150
3151#[derive(Debug)]
3152pub struct HighlightedRangeLine {
3153 pub start_x: Pixels,
3154 pub end_x: Pixels,
3155}
3156
3157impl HighlightedRange {
3158 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3159 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3160 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3161 self.paint_lines(
3162 self.start_y + self.line_height,
3163 &self.lines[1..],
3164 bounds,
3165 cx,
3166 );
3167 } else {
3168 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3169 }
3170 }
3171
3172 fn paint_lines(
3173 &self,
3174 start_y: Pixels,
3175 lines: &[HighlightedRangeLine],
3176 _bounds: Bounds<Pixels>,
3177 cx: &mut WindowContext,
3178 ) {
3179 if lines.is_empty() {
3180 return;
3181 }
3182
3183 let first_line = lines.first().unwrap();
3184 let last_line = lines.last().unwrap();
3185
3186 let first_top_left = point(first_line.start_x, start_y);
3187 let first_top_right = point(first_line.end_x, start_y);
3188
3189 let curve_height = point(Pixels::ZERO, self.corner_radius);
3190 let curve_width = |start_x: Pixels, end_x: Pixels| {
3191 let max = (end_x - start_x) / 2.;
3192 let width = if max < self.corner_radius {
3193 max
3194 } else {
3195 self.corner_radius
3196 };
3197
3198 point(width, Pixels::ZERO)
3199 };
3200
3201 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3202 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3203 path.curve_to(first_top_right + curve_height, first_top_right);
3204
3205 let mut iter = lines.iter().enumerate().peekable();
3206 while let Some((ix, line)) = iter.next() {
3207 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3208
3209 if let Some((_, next_line)) = iter.peek() {
3210 let next_top_right = point(next_line.end_x, bottom_right.y);
3211
3212 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3213 Ordering::Equal => {
3214 path.line_to(bottom_right);
3215 }
3216 Ordering::Less => {
3217 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3218 path.line_to(bottom_right - curve_height);
3219 if self.corner_radius > Pixels::ZERO {
3220 path.curve_to(bottom_right - curve_width, bottom_right);
3221 }
3222 path.line_to(next_top_right + curve_width);
3223 if self.corner_radius > Pixels::ZERO {
3224 path.curve_to(next_top_right + curve_height, next_top_right);
3225 }
3226 }
3227 Ordering::Greater => {
3228 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3229 path.line_to(bottom_right - curve_height);
3230 if self.corner_radius > Pixels::ZERO {
3231 path.curve_to(bottom_right + curve_width, bottom_right);
3232 }
3233 path.line_to(next_top_right - curve_width);
3234 if self.corner_radius > Pixels::ZERO {
3235 path.curve_to(next_top_right + curve_height, next_top_right);
3236 }
3237 }
3238 }
3239 } else {
3240 let curve_width = curve_width(line.start_x, line.end_x);
3241 path.line_to(bottom_right - curve_height);
3242 if self.corner_radius > Pixels::ZERO {
3243 path.curve_to(bottom_right - curve_width, bottom_right);
3244 }
3245
3246 let bottom_left = point(line.start_x, bottom_right.y);
3247 path.line_to(bottom_left + curve_width);
3248 if self.corner_radius > Pixels::ZERO {
3249 path.curve_to(bottom_left - curve_height, bottom_left);
3250 }
3251 }
3252 }
3253
3254 if first_line.start_x > last_line.start_x {
3255 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3256 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3257 path.line_to(second_top_left + curve_height);
3258 if self.corner_radius > Pixels::ZERO {
3259 path.curve_to(second_top_left + curve_width, second_top_left);
3260 }
3261 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3262 path.line_to(first_bottom_left - curve_width);
3263 if self.corner_radius > Pixels::ZERO {
3264 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3265 }
3266 }
3267
3268 path.line_to(first_top_left + curve_height);
3269 if self.corner_radius > Pixels::ZERO {
3270 path.curve_to(first_top_left + top_curve_width, first_top_left);
3271 }
3272 path.line_to(first_top_right - top_curve_width);
3273
3274 cx.paint_path(path, self.color);
3275 }
3276}
3277
3278pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3279 (delta.pow(1.5) / 100.0).into()
3280}
3281
3282fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3283 (delta.pow(1.2) / 300.0).into()
3284}
3285
3286#[cfg(test)]
3287mod tests {
3288 use super::*;
3289 use crate::{
3290 display_map::{BlockDisposition, BlockProperties},
3291 editor_tests::{init_test, update_test_language_settings},
3292 Editor, MultiBuffer,
3293 };
3294 use gpui::TestAppContext;
3295 use language::language_settings;
3296 use log::info;
3297 use std::{num::NonZeroU32, sync::Arc};
3298 use util::test::sample_text;
3299
3300 #[gpui::test]
3301 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3302 init_test(cx, |_| {});
3303 let window = cx.add_window(|cx| {
3304 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3305 Editor::new(EditorMode::Full, buffer, None, cx)
3306 });
3307
3308 let editor = window.root(cx).unwrap();
3309 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3310 let element = EditorElement::new(&editor, style);
3311
3312 let layouts = window
3313 .update(cx, |editor, cx| {
3314 let snapshot = editor.snapshot(cx);
3315 element
3316 .shape_line_numbers(
3317 0..6,
3318 &Default::default(),
3319 DisplayPoint::new(0, 0),
3320 false,
3321 &snapshot,
3322 cx,
3323 )
3324 .0
3325 })
3326 .unwrap();
3327 assert_eq!(layouts.len(), 6);
3328
3329 let relative_rows = window
3330 .update(cx, |editor, cx| {
3331 let snapshot = editor.snapshot(cx);
3332 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3333 })
3334 .unwrap();
3335 assert_eq!(relative_rows[&0], 3);
3336 assert_eq!(relative_rows[&1], 2);
3337 assert_eq!(relative_rows[&2], 1);
3338 // current line has no relative number
3339 assert_eq!(relative_rows[&4], 1);
3340 assert_eq!(relative_rows[&5], 2);
3341
3342 // works if cursor is before screen
3343 let relative_rows = window
3344 .update(cx, |editor, cx| {
3345 let snapshot = editor.snapshot(cx);
3346
3347 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3348 })
3349 .unwrap();
3350 assert_eq!(relative_rows.len(), 3);
3351 assert_eq!(relative_rows[&3], 2);
3352 assert_eq!(relative_rows[&4], 3);
3353 assert_eq!(relative_rows[&5], 4);
3354
3355 // works if cursor is after 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, &(0..3), Some(6))
3361 })
3362 .unwrap();
3363 assert_eq!(relative_rows.len(), 3);
3364 assert_eq!(relative_rows[&0], 5);
3365 assert_eq!(relative_rows[&1], 4);
3366 assert_eq!(relative_rows[&2], 3);
3367 }
3368
3369 #[gpui::test]
3370 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3371 init_test(cx, |_| {});
3372
3373 let window = cx.add_window(|cx| {
3374 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3375 Editor::new(EditorMode::Full, buffer, None, cx)
3376 });
3377 let editor = window.root(cx).unwrap();
3378 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3379 let mut element = EditorElement::new(&editor, style);
3380
3381 window
3382 .update(cx, |editor, cx| {
3383 editor.cursor_shape = CursorShape::Block;
3384 editor.change_selections(None, cx, |s| {
3385 s.select_ranges([
3386 Point::new(0, 0)..Point::new(1, 0),
3387 Point::new(3, 2)..Point::new(3, 3),
3388 Point::new(5, 6)..Point::new(6, 0),
3389 ]);
3390 });
3391 })
3392 .unwrap();
3393 let state = cx
3394 .update_window(window.into(), |_, cx| {
3395 element.compute_layout(
3396 Bounds {
3397 origin: point(px(500.), px(500.)),
3398 size: size(px(500.), px(500.)),
3399 },
3400 cx,
3401 )
3402 })
3403 .unwrap();
3404
3405 assert_eq!(state.selections.len(), 1);
3406 let local_selections = &state.selections[0].1;
3407 assert_eq!(local_selections.len(), 3);
3408 // moves cursor back one line
3409 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3410 assert_eq!(
3411 local_selections[0].range,
3412 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3413 );
3414
3415 // moves cursor back one column
3416 assert_eq!(
3417 local_selections[1].range,
3418 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3419 );
3420 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3421
3422 // leaves cursor on the max point
3423 assert_eq!(
3424 local_selections[2].range,
3425 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3426 );
3427 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3428
3429 // active lines does not include 1 (even though the range of the selection does)
3430 assert_eq!(
3431 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3432 vec![0, 3, 5, 6]
3433 );
3434
3435 // multi-buffer support
3436 // in DisplayPoint co-ordinates, this is what we're dealing with:
3437 // 0: [[file
3438 // 1: header]]
3439 // 2: aaaaaa
3440 // 3: bbbbbb
3441 // 4: cccccc
3442 // 5:
3443 // 6: ...
3444 // 7: ffffff
3445 // 8: gggggg
3446 // 9: hhhhhh
3447 // 10:
3448 // 11: [[file
3449 // 12: header]]
3450 // 13: bbbbbb
3451 // 14: cccccc
3452 // 15: dddddd
3453 let window = cx.add_window(|cx| {
3454 let buffer = MultiBuffer::build_multi(
3455 [
3456 (
3457 &(sample_text(8, 6, 'a') + "\n"),
3458 vec![
3459 Point::new(0, 0)..Point::new(3, 0),
3460 Point::new(4, 0)..Point::new(7, 0),
3461 ],
3462 ),
3463 (
3464 &(sample_text(8, 6, 'a') + "\n"),
3465 vec![Point::new(1, 0)..Point::new(3, 0)],
3466 ),
3467 ],
3468 cx,
3469 );
3470 Editor::new(EditorMode::Full, buffer, None, cx)
3471 });
3472 let editor = window.root(cx).unwrap();
3473 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3474 let mut element = EditorElement::new(&editor, style);
3475 let _state = window.update(cx, |editor, cx| {
3476 editor.cursor_shape = CursorShape::Block;
3477 editor.change_selections(None, cx, |s| {
3478 s.select_display_ranges([
3479 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3480 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3481 ]);
3482 });
3483 });
3484
3485 let state = cx
3486 .update_window(window.into(), |_, cx| {
3487 element.compute_layout(
3488 Bounds {
3489 origin: point(px(500.), px(500.)),
3490 size: size(px(500.), px(500.)),
3491 },
3492 cx,
3493 )
3494 })
3495 .unwrap();
3496 assert_eq!(state.selections.len(), 1);
3497 let local_selections = &state.selections[0].1;
3498 assert_eq!(local_selections.len(), 2);
3499
3500 // moves cursor on excerpt boundary back a line
3501 // and doesn't allow selection to bleed through
3502 assert_eq!(
3503 local_selections[0].range,
3504 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3505 );
3506 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3507 // moves cursor on buffer boundary back two lines
3508 // and doesn't allow selection to bleed through
3509 assert_eq!(
3510 local_selections[1].range,
3511 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3512 );
3513 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3514 }
3515
3516 #[gpui::test]
3517 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3518 init_test(cx, |_| {});
3519
3520 let window = cx.add_window(|cx| {
3521 let buffer = MultiBuffer::build_simple("", cx);
3522 Editor::new(EditorMode::Full, buffer, None, cx)
3523 });
3524 let editor = window.root(cx).unwrap();
3525 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3526 window
3527 .update(cx, |editor, cx| {
3528 editor.set_placeholder_text("hello", cx);
3529 editor.insert_blocks(
3530 [BlockProperties {
3531 style: BlockStyle::Fixed,
3532 disposition: BlockDisposition::Above,
3533 height: 3,
3534 position: Anchor::min(),
3535 render: Arc::new(|_| div().into_any()),
3536 }],
3537 None,
3538 cx,
3539 );
3540
3541 // Blur the editor so that it displays placeholder text.
3542 cx.blur();
3543 })
3544 .unwrap();
3545
3546 let mut element = EditorElement::new(&editor, style);
3547 let state = cx
3548 .update_window(window.into(), |_, cx| {
3549 element.compute_layout(
3550 Bounds {
3551 origin: point(px(500.), px(500.)),
3552 size: size(px(500.), px(500.)),
3553 },
3554 cx,
3555 )
3556 })
3557 .unwrap();
3558 let size = state.position_map.size;
3559
3560 assert_eq!(state.position_map.line_layouts.len(), 4);
3561 assert_eq!(
3562 state
3563 .line_numbers
3564 .iter()
3565 .map(Option::is_some)
3566 .collect::<Vec<_>>(),
3567 &[false, false, false, true]
3568 );
3569
3570 // Don't panic.
3571 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3572 cx.update_window(window.into(), |_, cx| {
3573 element.paint(bounds, &mut (), cx);
3574 })
3575 .unwrap()
3576 }
3577
3578 #[gpui::test]
3579 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3580 const TAB_SIZE: u32 = 4;
3581
3582 let input_text = "\t \t|\t| a b";
3583 let expected_invisibles = vec![
3584 Invisible::Tab {
3585 line_start_offset: 0,
3586 },
3587 Invisible::Whitespace {
3588 line_offset: TAB_SIZE as usize,
3589 },
3590 Invisible::Tab {
3591 line_start_offset: TAB_SIZE as usize + 1,
3592 },
3593 Invisible::Tab {
3594 line_start_offset: TAB_SIZE as usize * 2 + 1,
3595 },
3596 Invisible::Whitespace {
3597 line_offset: TAB_SIZE as usize * 3 + 1,
3598 },
3599 Invisible::Whitespace {
3600 line_offset: TAB_SIZE as usize * 3 + 3,
3601 },
3602 ];
3603 assert_eq!(
3604 expected_invisibles.len(),
3605 input_text
3606 .chars()
3607 .filter(|initial_char| initial_char.is_whitespace())
3608 .count(),
3609 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3610 );
3611
3612 init_test(cx, |s| {
3613 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3614 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3615 });
3616
3617 let actual_invisibles =
3618 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3619
3620 assert_eq!(expected_invisibles, actual_invisibles);
3621 }
3622
3623 #[gpui::test]
3624 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3625 init_test(cx, |s| {
3626 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3627 s.defaults.tab_size = NonZeroU32::new(4);
3628 });
3629
3630 for editor_mode_without_invisibles in [
3631 EditorMode::SingleLine,
3632 EditorMode::AutoHeight { max_lines: 100 },
3633 ] {
3634 let invisibles = collect_invisibles_from_new_editor(
3635 cx,
3636 editor_mode_without_invisibles,
3637 "\t\t\t| | a b",
3638 px(500.0),
3639 );
3640 assert!(invisibles.is_empty(),
3641 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3642 }
3643 }
3644
3645 #[gpui::test]
3646 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3647 let tab_size = 4;
3648 let input_text = "a\tbcd ".repeat(9);
3649 let repeated_invisibles = [
3650 Invisible::Tab {
3651 line_start_offset: 1,
3652 },
3653 Invisible::Whitespace {
3654 line_offset: tab_size as usize + 3,
3655 },
3656 Invisible::Whitespace {
3657 line_offset: tab_size as usize + 4,
3658 },
3659 Invisible::Whitespace {
3660 line_offset: tab_size as usize + 5,
3661 },
3662 ];
3663 let expected_invisibles = std::iter::once(repeated_invisibles)
3664 .cycle()
3665 .take(9)
3666 .flatten()
3667 .collect::<Vec<_>>();
3668 assert_eq!(
3669 expected_invisibles.len(),
3670 input_text
3671 .chars()
3672 .filter(|initial_char| initial_char.is_whitespace())
3673 .count(),
3674 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3675 );
3676 info!("Expected invisibles: {expected_invisibles:?}");
3677
3678 init_test(cx, |_| {});
3679
3680 // Put the same string with repeating whitespace pattern into editors of various size,
3681 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3682 let resize_step = 10.0;
3683 let mut editor_width = 200.0;
3684 while editor_width <= 1000.0 {
3685 update_test_language_settings(cx, |s| {
3686 s.defaults.tab_size = NonZeroU32::new(tab_size);
3687 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3688 s.defaults.preferred_line_length = Some(editor_width as u32);
3689 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3690 });
3691
3692 let actual_invisibles = collect_invisibles_from_new_editor(
3693 cx,
3694 EditorMode::Full,
3695 &input_text,
3696 px(editor_width),
3697 );
3698
3699 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3700 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3701 let mut i = 0;
3702 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3703 i = actual_index;
3704 match expected_invisibles.get(i) {
3705 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3706 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3707 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3708 _ => {
3709 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3710 }
3711 },
3712 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3713 }
3714 }
3715 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3716 assert!(
3717 missing_expected_invisibles.is_empty(),
3718 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3719 );
3720
3721 editor_width += resize_step;
3722 }
3723 }
3724
3725 fn collect_invisibles_from_new_editor(
3726 cx: &mut TestAppContext,
3727 editor_mode: EditorMode,
3728 input_text: &str,
3729 editor_width: Pixels,
3730 ) -> Vec<Invisible> {
3731 info!(
3732 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3733 editor_width.0
3734 );
3735 let window = cx.add_window(|cx| {
3736 let buffer = MultiBuffer::build_simple(&input_text, cx);
3737 Editor::new(editor_mode, buffer, None, cx)
3738 });
3739 let editor = window.root(cx).unwrap();
3740 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3741 let mut element = EditorElement::new(&editor, style);
3742 window
3743 .update(cx, |editor, cx| {
3744 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3745 editor.set_wrap_width(Some(editor_width), cx);
3746 })
3747 .unwrap();
3748 let layout_state = cx
3749 .update_window(window.into(), |_, cx| {
3750 element.compute_layout(
3751 Bounds {
3752 origin: point(px(500.), px(500.)),
3753 size: size(px(500.), px(500.)),
3754 },
3755 cx,
3756 )
3757 })
3758 .unwrap();
3759
3760 layout_state
3761 .position_map
3762 .line_layouts
3763 .iter()
3764 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3765 .flatten()
3766 .cloned()
3767 .collect()
3768 }
3769}
3770
3771pub fn register_action<T: Action>(
3772 view: &View<Editor>,
3773 cx: &mut WindowContext,
3774 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3775) {
3776 let view = view.clone();
3777 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3778 let action = action.downcast_ref().unwrap();
3779 if phase == DispatchPhase::Bubble {
3780 view.update(cx, |editor, cx| {
3781 listener(editor, action, cx);
3782 })
3783 }
3784 })
3785}
3786
3787fn compute_auto_height_layout(
3788 editor: &mut Editor,
3789 max_lines: usize,
3790 max_line_number_width: Pixels,
3791 known_dimensions: Size<Option<Pixels>>,
3792 cx: &mut ViewContext<Editor>,
3793) -> Option<Size<Pixels>> {
3794 let width = known_dimensions.width?;
3795 if let Some(height) = known_dimensions.height {
3796 return Some(size(width, height));
3797 }
3798
3799 let style = editor.style.as_ref().unwrap();
3800 let font_id = cx.text_system().resolve_font(&style.text.font());
3801 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3802 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3803 let em_width = cx
3804 .text_system()
3805 .typographic_bounds(font_id, font_size, 'm')
3806 .unwrap()
3807 .size
3808 .width;
3809
3810 let mut snapshot = editor.snapshot(cx);
3811 let gutter_width;
3812 let gutter_margin;
3813 if snapshot.show_gutter {
3814 let descent = cx.text_system().descent(font_id, font_size);
3815 let gutter_padding_factor = 3.5;
3816 let gutter_padding = (em_width * gutter_padding_factor).round();
3817 gutter_width = max_line_number_width + gutter_padding * 2.0;
3818 gutter_margin = -descent;
3819 } else {
3820 gutter_width = Pixels::ZERO;
3821 gutter_margin = Pixels::ZERO;
3822 };
3823
3824 editor.gutter_width = gutter_width;
3825 let text_width = width - gutter_width;
3826 let overscroll = size(em_width, px(0.));
3827
3828 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3829 if editor.set_wrap_width(Some(editor_width), cx) {
3830 snapshot = editor.snapshot(cx);
3831 }
3832
3833 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3834 let height = scroll_height
3835 .max(line_height)
3836 .min(line_height * max_lines as f32);
3837
3838 Some(size(width, height))
3839}