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