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