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 link_go_to_definition::{
12 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
13 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
14 LinkGoToDefinitionState,
15 },
16 mouse_context_menu,
17 scroll::scroll_amount::ScrollAmount,
18 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
19 HalfPageDown, HalfPageUp, LineDown, LineUp, MoveDown, OpenExcerpts, PageDown, PageUp, Point,
20 SelectPhase, Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
21};
22use anyhow::Result;
23use collections::{BTreeMap, HashMap};
24use git::diff::DiffHunkStatus;
25use gpui::{
26 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
27 AnchorCorner, AnyElement, AsyncWindowContext, AvailableSpace, BorrowWindow, Bounds,
28 ContentMask, Corners, CursorStyle, DispatchPhase, Edges, Element, ElementId,
29 ElementInputHandler, Entity, EntityId, Hsla, InteractiveBounds, InteractiveElement,
30 IntoElement, LineLayout, ModifiersChangedEvent, MouseButton, MouseDownEvent, MouseMoveEvent,
31 MouseUpEvent, ParentElement, Pixels, RenderOnce, ScrollWheelEvent, ShapedLine, SharedString,
32 Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun, TextStyle, View,
33 ViewContext, WeakView, WindowContext, WrappedLine,
34};
35use itertools::Itertools;
36use language::{language_settings::ShowWhitespaceSetting, Language};
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::{
56 h_stack, ButtonLike, ButtonStyle, Disclosure, IconButton, IconElement, IconSize, Label, Tooltip,
57};
58use ui::{prelude::*, Icon};
59use util::ResultExt;
60use workspace::item::Item;
61
62enum FoldMarkers {}
63
64struct SelectionLayout {
65 head: DisplayPoint,
66 cursor_shape: CursorShape,
67 is_newest: bool,
68 is_local: bool,
69 range: Range<DisplayPoint>,
70 active_rows: Range<u32>,
71}
72
73impl SelectionLayout {
74 fn new<T: ToPoint + ToDisplayPoint + Clone>(
75 selection: Selection<T>,
76 line_mode: bool,
77 cursor_shape: CursorShape,
78 map: &DisplaySnapshot,
79 is_newest: bool,
80 is_local: bool,
81 ) -> Self {
82 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
83 let display_selection = point_selection.map(|p| p.to_display_point(map));
84 let mut range = display_selection.range();
85 let mut head = display_selection.head();
86 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
87 ..map.next_line_boundary(point_selection.end).1.row();
88
89 // vim visual line mode
90 if line_mode {
91 let point_range = map.expand_to_line(point_selection.range());
92 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
93 }
94
95 // any vim visual mode (including line mode)
96 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
97 if head.column() > 0 {
98 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
99 } else if head.row() > 0 && head != map.max_point() {
100 head = map.clip_point(
101 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
102 Bias::Left,
103 );
104 // updating range.end is a no-op unless you're cursor is
105 // on the newline containing a multi-buffer divider
106 // in which case the clip_point may have moved the head up
107 // an additional row.
108 range.end = DisplayPoint::new(head.row() + 1, 0);
109 active_rows.end = head.row();
110 }
111 }
112
113 Self {
114 head,
115 cursor_shape,
116 is_newest,
117 is_local,
118 range,
119 active_rows,
120 }
121 }
122}
123
124pub struct EditorElement {
125 editor: View<Editor>,
126 style: EditorStyle,
127}
128
129impl EditorElement {
130 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
131 Self {
132 editor: editor.clone(),
133 style,
134 }
135 }
136
137 fn register_actions(&self, cx: &mut WindowContext) {
138 let view = &self.editor;
139 view.update(cx, |editor, cx| {
140 for action in editor.editor_actions.iter() {
141 (action)(cx)
142 }
143 });
144
145 crate::rust_analyzer_ext::apply_related_actions(view, cx);
146 register_action(view, cx, Editor::move_left);
147 register_action(view, cx, Editor::move_right);
148 register_action(view, cx, Editor::move_down);
149 register_action(view, cx, Editor::move_up);
150 register_action(view, cx, Editor::cancel);
151 register_action(view, cx, Editor::newline);
152 register_action(view, cx, Editor::newline_above);
153 register_action(view, cx, Editor::newline_below);
154 register_action(view, cx, Editor::backspace);
155 register_action(view, cx, Editor::delete);
156 register_action(view, cx, Editor::tab);
157 register_action(view, cx, Editor::tab_prev);
158 register_action(view, cx, Editor::indent);
159 register_action(view, cx, Editor::outdent);
160 register_action(view, cx, Editor::delete_line);
161 register_action(view, cx, Editor::join_lines);
162 register_action(view, cx, Editor::sort_lines_case_sensitive);
163 register_action(view, cx, Editor::sort_lines_case_insensitive);
164 register_action(view, cx, Editor::reverse_lines);
165 register_action(view, cx, Editor::shuffle_lines);
166 register_action(view, cx, Editor::convert_to_upper_case);
167 register_action(view, cx, Editor::convert_to_lower_case);
168 register_action(view, cx, Editor::convert_to_title_case);
169 register_action(view, cx, Editor::convert_to_snake_case);
170 register_action(view, cx, Editor::convert_to_kebab_case);
171 register_action(view, cx, Editor::convert_to_upper_camel_case);
172 register_action(view, cx, Editor::convert_to_lower_camel_case);
173 register_action(view, cx, Editor::delete_to_previous_word_start);
174 register_action(view, cx, Editor::delete_to_previous_subword_start);
175 register_action(view, cx, Editor::delete_to_next_word_end);
176 register_action(view, cx, Editor::delete_to_next_subword_end);
177 register_action(view, cx, Editor::delete_to_beginning_of_line);
178 register_action(view, cx, Editor::delete_to_end_of_line);
179 register_action(view, cx, Editor::cut_to_end_of_line);
180 register_action(view, cx, Editor::duplicate_line);
181 register_action(view, cx, Editor::move_line_up);
182 register_action(view, cx, Editor::move_line_down);
183 register_action(view, cx, Editor::transpose);
184 register_action(view, cx, Editor::cut);
185 register_action(view, cx, Editor::copy);
186 register_action(view, cx, Editor::paste);
187 register_action(view, cx, Editor::undo);
188 register_action(view, cx, Editor::redo);
189 register_action(view, cx, Editor::move_page_up);
190 register_action(view, cx, Editor::move_page_down);
191 register_action(view, cx, Editor::next_screen);
192 register_action(view, cx, Editor::scroll_cursor_top);
193 register_action(view, cx, Editor::scroll_cursor_center);
194 register_action(view, cx, Editor::scroll_cursor_bottom);
195 register_action(view, cx, |editor, _: &LineDown, cx| {
196 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
197 });
198 register_action(view, cx, |editor, _: &LineUp, cx| {
199 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
200 });
201 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
202 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
203 });
204 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
205 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
206 });
207 register_action(view, cx, |editor, _: &PageDown, cx| {
208 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
209 });
210 register_action(view, cx, |editor, _: &PageUp, cx| {
211 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
212 });
213 register_action(view, cx, Editor::move_to_previous_word_start);
214 register_action(view, cx, Editor::move_to_previous_subword_start);
215 register_action(view, cx, Editor::move_to_next_word_end);
216 register_action(view, cx, Editor::move_to_next_subword_end);
217 register_action(view, cx, Editor::move_to_beginning_of_line);
218 register_action(view, cx, Editor::move_to_end_of_line);
219 register_action(view, cx, Editor::move_to_start_of_paragraph);
220 register_action(view, cx, Editor::move_to_end_of_paragraph);
221 register_action(view, cx, Editor::move_to_beginning);
222 register_action(view, cx, Editor::move_to_end);
223 register_action(view, cx, Editor::select_up);
224 register_action(view, cx, Editor::select_down);
225 register_action(view, cx, Editor::select_left);
226 register_action(view, cx, Editor::select_right);
227 register_action(view, cx, Editor::select_to_previous_word_start);
228 register_action(view, cx, Editor::select_to_previous_subword_start);
229 register_action(view, cx, Editor::select_to_next_word_end);
230 register_action(view, cx, Editor::select_to_next_subword_end);
231 register_action(view, cx, Editor::select_to_beginning_of_line);
232 register_action(view, cx, Editor::select_to_end_of_line);
233 register_action(view, cx, Editor::select_to_start_of_paragraph);
234 register_action(view, cx, Editor::select_to_end_of_paragraph);
235 register_action(view, cx, Editor::select_to_beginning);
236 register_action(view, cx, Editor::select_to_end);
237 register_action(view, cx, Editor::select_all);
238 register_action(view, cx, |editor, action, cx| {
239 editor.select_all_matches(action, cx).log_err();
240 });
241 register_action(view, cx, Editor::select_line);
242 register_action(view, cx, Editor::split_selection_into_lines);
243 register_action(view, cx, Editor::add_selection_above);
244 register_action(view, cx, Editor::add_selection_below);
245 register_action(view, cx, |editor, action, cx| {
246 editor.select_next(action, cx).log_err();
247 });
248 register_action(view, cx, |editor, action, cx| {
249 editor.select_previous(action, cx).log_err();
250 });
251 register_action(view, cx, Editor::toggle_comments);
252 register_action(view, cx, Editor::select_larger_syntax_node);
253 register_action(view, cx, Editor::select_smaller_syntax_node);
254 register_action(view, cx, Editor::move_to_enclosing_bracket);
255 register_action(view, cx, Editor::undo_selection);
256 register_action(view, cx, Editor::redo_selection);
257 register_action(view, cx, Editor::go_to_diagnostic);
258 register_action(view, cx, Editor::go_to_prev_diagnostic);
259 register_action(view, cx, Editor::go_to_hunk);
260 register_action(view, cx, Editor::go_to_prev_hunk);
261 register_action(view, cx, Editor::go_to_definition);
262 register_action(view, cx, Editor::go_to_definition_split);
263 register_action(view, cx, Editor::go_to_type_definition);
264 register_action(view, cx, Editor::go_to_type_definition_split);
265 register_action(view, cx, Editor::fold);
266 register_action(view, cx, Editor::fold_at);
267 register_action(view, cx, Editor::unfold_lines);
268 register_action(view, cx, Editor::unfold_at);
269 register_action(view, cx, Editor::fold_selected_ranges);
270 register_action(view, cx, Editor::show_completions);
271 register_action(view, cx, Editor::toggle_code_actions);
272 register_action(view, cx, Editor::open_excerpts);
273 register_action(view, cx, Editor::toggle_soft_wrap);
274 register_action(view, cx, Editor::toggle_inlay_hints);
275 register_action(view, cx, hover_popover::hover);
276 register_action(view, cx, Editor::reveal_in_finder);
277 register_action(view, cx, Editor::copy_path);
278 register_action(view, cx, Editor::copy_relative_path);
279 register_action(view, cx, Editor::copy_highlight_json);
280 register_action(view, cx, |editor, action, cx| {
281 if let Some(task) = editor.format(action, cx) {
282 task.detach_and_log_err(cx);
283 } else {
284 cx.propagate();
285 }
286 });
287 register_action(view, cx, Editor::restart_language_server);
288 register_action(view, cx, Editor::show_character_palette);
289 register_action(view, cx, |editor, action, cx| {
290 if let Some(task) = editor.confirm_completion(action, cx) {
291 task.detach_and_log_err(cx);
292 } else {
293 cx.propagate();
294 }
295 });
296 register_action(view, cx, |editor, action, cx| {
297 if let Some(task) = editor.confirm_code_action(action, cx) {
298 task.detach_and_log_err(cx);
299 } else {
300 cx.propagate();
301 }
302 });
303 register_action(view, cx, |editor, action, cx| {
304 if let Some(task) = editor.rename(action, cx) {
305 task.detach_and_log_err(cx);
306 } else {
307 cx.propagate();
308 }
309 });
310 register_action(view, cx, |editor, action, cx| {
311 if let Some(task) = editor.confirm_rename(action, cx) {
312 task.detach_and_log_err(cx);
313 } else {
314 cx.propagate();
315 }
316 });
317 register_action(view, cx, |editor, action, cx| {
318 if let Some(task) = editor.find_all_references(action, cx) {
319 task.detach_and_log_err(cx);
320 } else {
321 cx.propagate();
322 }
323 });
324 register_action(view, cx, Editor::next_copilot_suggestion);
325 register_action(view, cx, Editor::previous_copilot_suggestion);
326 register_action(view, cx, Editor::copilot_suggest);
327 register_action(view, cx, Editor::context_menu_first);
328 register_action(view, cx, Editor::context_menu_prev);
329 register_action(view, cx, Editor::context_menu_next);
330 register_action(view, cx, Editor::context_menu_last);
331 }
332
333 fn register_key_listeners(&self, cx: &mut WindowContext) {
334 cx.on_key_event({
335 let editor = self.editor.clone();
336 move |event: &ModifiersChangedEvent, phase, cx| {
337 if phase != DispatchPhase::Bubble {
338 return;
339 }
340
341 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
342 cx.stop_propagation();
343 }
344 }
345 });
346 }
347
348 pub(crate) fn modifiers_changed(
349 editor: &mut Editor,
350 event: &ModifiersChangedEvent,
351 cx: &mut ViewContext<Editor>,
352 ) -> bool {
353 let pending_selection = editor.has_pending_selection();
354
355 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
356 if event.command && !pending_selection {
357 let point = point.clone();
358 let snapshot = editor.snapshot(cx);
359 let kind = point.definition_kind(event.shift);
360
361 show_link_definition(kind, editor, point, snapshot, cx);
362 return false;
363 }
364 }
365
366 {
367 if editor.link_go_to_definition_state.symbol_range.is_some()
368 || !editor.link_go_to_definition_state.definitions.is_empty()
369 {
370 editor.link_go_to_definition_state.symbol_range.take();
371 editor.link_go_to_definition_state.definitions.clear();
372 cx.notify();
373 }
374
375 editor.link_go_to_definition_state.task = None;
376
377 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
378 }
379
380 false
381 }
382
383 fn mouse_left_down(
384 editor: &mut Editor,
385 event: &MouseDownEvent,
386 position_map: &PositionMap,
387 text_bounds: Bounds<Pixels>,
388 gutter_bounds: Bounds<Pixels>,
389 stacking_order: &StackingOrder,
390 cx: &mut ViewContext<Editor>,
391 ) {
392 let mut click_count = event.click_count;
393 let modifiers = event.modifiers;
394
395 if gutter_bounds.contains(&event.position) {
396 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
397 } else if !text_bounds.contains(&event.position) {
398 return;
399 }
400 if !cx.was_top_layer(&event.position, stacking_order) {
401 return;
402 }
403
404 let point_for_position = position_map.point_for_position(text_bounds, event.position);
405 let position = point_for_position.previous_valid;
406 if modifiers.shift && modifiers.alt {
407 editor.select(
408 SelectPhase::BeginColumnar {
409 position,
410 goal_column: point_for_position.exact_unclipped.column(),
411 },
412 cx,
413 );
414 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
415 editor.select(
416 SelectPhase::Extend {
417 position,
418 click_count,
419 },
420 cx,
421 );
422 } else {
423 editor.select(
424 SelectPhase::Begin {
425 position,
426 add: modifiers.alt,
427 click_count,
428 },
429 cx,
430 );
431 }
432
433 cx.stop_propagation();
434 }
435
436 fn mouse_right_down(
437 editor: &mut Editor,
438 event: &MouseDownEvent,
439 position_map: &PositionMap,
440 text_bounds: Bounds<Pixels>,
441 cx: &mut ViewContext<Editor>,
442 ) {
443 if !text_bounds.contains(&event.position) {
444 return;
445 }
446 let point_for_position = position_map.point_for_position(text_bounds, event.position);
447 mouse_context_menu::deploy_context_menu(
448 editor,
449 event.position,
450 point_for_position.previous_valid,
451 cx,
452 );
453 cx.stop_propagation();
454 }
455
456 fn mouse_up(
457 editor: &mut Editor,
458 event: &MouseUpEvent,
459 position_map: &PositionMap,
460 text_bounds: Bounds<Pixels>,
461 stacking_order: &StackingOrder,
462 cx: &mut ViewContext<Editor>,
463 ) {
464 let end_selection = editor.has_pending_selection();
465 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
466
467 if end_selection {
468 editor.select(SelectPhase::End, cx);
469 }
470
471 if !pending_nonempty_selections
472 && event.modifiers.command
473 && text_bounds.contains(&event.position)
474 && cx.was_top_layer(&event.position, stacking_order)
475 {
476 let point = position_map.point_for_position(text_bounds, event.position);
477 let could_be_inlay = point.as_valid().is_none();
478 let split = event.modifiers.alt;
479 if event.modifiers.shift || could_be_inlay {
480 go_to_fetched_type_definition(editor, point, split, cx);
481 } else {
482 go_to_fetched_definition(editor, point, split, cx);
483 }
484
485 cx.stop_propagation();
486 } else if end_selection {
487 cx.stop_propagation();
488 }
489 }
490
491 fn mouse_moved(
492 editor: &mut Editor,
493 event: &MouseMoveEvent,
494 position_map: &PositionMap,
495 text_bounds: Bounds<Pixels>,
496 gutter_bounds: Bounds<Pixels>,
497 stacking_order: &StackingOrder,
498 cx: &mut ViewContext<Editor>,
499 ) {
500 let modifiers = event.modifiers;
501 if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
502 let point_for_position = position_map.point_for_position(text_bounds, event.position);
503 let mut scroll_delta = gpui::Point::<f32>::default();
504 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
505 let top = text_bounds.origin.y + vertical_margin;
506 let bottom = text_bounds.lower_left().y - vertical_margin;
507 if event.position.y < top {
508 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
509 }
510 if event.position.y > bottom {
511 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
512 }
513
514 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
515 let left = text_bounds.origin.x + horizontal_margin;
516 let right = text_bounds.upper_right().x - horizontal_margin;
517 if event.position.x < left {
518 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
519 }
520 if event.position.x > right {
521 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
522 }
523
524 editor.select(
525 SelectPhase::Update {
526 position: point_for_position.previous_valid,
527 goal_column: point_for_position.exact_unclipped.column(),
528 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
529 .clamp(&gpui::Point::default(), &position_map.scroll_max),
530 },
531 cx,
532 );
533 }
534
535 let text_hovered = text_bounds.contains(&event.position);
536 let gutter_hovered = gutter_bounds.contains(&event.position);
537 let was_top = cx.was_top_layer(&event.position, stacking_order);
538
539 editor.set_gutter_hovered(gutter_hovered, cx);
540
541 // Don't trigger hover popover if mouse is hovering over context menu
542 if text_hovered && was_top {
543 let point_for_position = position_map.point_for_position(text_bounds, event.position);
544
545 match point_for_position.as_valid() {
546 Some(point) => {
547 update_go_to_definition_link(
548 editor,
549 Some(GoToDefinitionTrigger::Text(point)),
550 modifiers.command,
551 modifiers.shift,
552 cx,
553 );
554 hover_at(editor, Some(point), cx);
555 }
556 None => {
557 update_inlay_link_and_hover_points(
558 &position_map.snapshot,
559 point_for_position,
560 editor,
561 modifiers.command,
562 modifiers.shift,
563 cx,
564 );
565 }
566 }
567
568 cx.stop_propagation();
569 } else {
570 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
571 hover_at(editor, None, cx);
572 if gutter_hovered && was_top {
573 cx.stop_propagation();
574 }
575 }
576 }
577
578 fn scroll(
579 editor: &mut Editor,
580 event: &ScrollWheelEvent,
581 position_map: &PositionMap,
582 bounds: &InteractiveBounds,
583 cx: &mut ViewContext<Editor>,
584 ) {
585 if !bounds.visibly_contains(&event.position, cx) {
586 return;
587 }
588
589 let line_height = position_map.line_height;
590 let max_glyph_width = position_map.em_width;
591 let (delta, axis) = match event.delta {
592 gpui::ScrollDelta::Pixels(mut pixels) => {
593 //Trackpad
594 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
595 (pixels, axis)
596 }
597
598 gpui::ScrollDelta::Lines(lines) => {
599 //Not trackpad
600 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
601 (pixels, None)
602 }
603 };
604
605 let scroll_position = position_map.snapshot.scroll_position();
606 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
607 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
608 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
609 editor.scroll(scroll_position, axis, cx);
610 cx.stop_propagation();
611 }
612
613 fn paint_background(
614 &self,
615 gutter_bounds: Bounds<Pixels>,
616 text_bounds: Bounds<Pixels>,
617 layout: &LayoutState,
618 cx: &mut WindowContext,
619 ) {
620 let bounds = gutter_bounds.union(&text_bounds);
621 let scroll_top =
622 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
623 let gutter_bg = cx.theme().colors().editor_gutter_background;
624 cx.paint_quad(fill(gutter_bounds, gutter_bg));
625 cx.paint_quad(fill(text_bounds, self.style.background));
626
627 if let EditorMode::Full = layout.mode {
628 let mut active_rows = layout.active_rows.iter().peekable();
629 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
630 let mut end_row = *start_row;
631 while active_rows.peek().map_or(false, |r| {
632 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
633 }) {
634 active_rows.next().unwrap();
635 end_row += 1;
636 }
637
638 if !contains_non_empty_selection {
639 let origin = point(
640 bounds.origin.x,
641 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
642 - scroll_top,
643 );
644 let size = size(
645 bounds.size.width,
646 layout.position_map.line_height * (end_row - start_row + 1) as f32,
647 );
648 let active_line_bg = cx.theme().colors().editor_active_line_background;
649 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
650 }
651 }
652
653 if let Some(highlighted_rows) = &layout.highlighted_rows {
654 let origin = point(
655 bounds.origin.x,
656 bounds.origin.y
657 + (layout.position_map.line_height * highlighted_rows.start as f32)
658 - scroll_top,
659 );
660 let size = size(
661 bounds.size.width,
662 layout.position_map.line_height * highlighted_rows.len() as f32,
663 );
664 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
665 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
666 }
667
668 let scroll_left =
669 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
670
671 for (wrap_position, active) in layout.wrap_guides.iter() {
672 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
673 - scroll_left;
674
675 if x < text_bounds.origin.x
676 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
677 {
678 continue;
679 }
680
681 let color = if *active {
682 cx.theme().colors().editor_active_wrap_guide
683 } else {
684 cx.theme().colors().editor_wrap_guide
685 };
686 cx.paint_quad(fill(
687 Bounds {
688 origin: point(x, text_bounds.origin.y),
689 size: size(px(1.), text_bounds.size.height),
690 },
691 color,
692 ));
693 }
694 }
695 }
696
697 fn paint_gutter(
698 &mut self,
699 bounds: Bounds<Pixels>,
700 layout: &mut LayoutState,
701 cx: &mut WindowContext,
702 ) {
703 let line_height = layout.position_map.line_height;
704
705 let scroll_position = layout.position_map.snapshot.scroll_position();
706 let scroll_top = scroll_position.y * line_height;
707
708 let show_gutter = matches!(
709 ProjectSettings::get_global(cx).git.git_gutter,
710 Some(GitGutterSetting::TrackedFiles)
711 );
712
713 if show_gutter {
714 Self::paint_diff_hunks(bounds, layout, cx);
715 }
716
717 for (ix, line) in layout.line_numbers.iter().enumerate() {
718 if let Some(line) = line {
719 let line_origin = bounds.origin
720 + point(
721 bounds.size.width - line.width - layout.gutter_padding,
722 ix as f32 * line_height - (scroll_top % line_height),
723 );
724
725 line.paint(line_origin, line_height, cx);
726 }
727 }
728
729 cx.with_z_index(1, |cx| {
730 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
731 if let Some(mut fold_indicator) = fold_indicator {
732 let mut fold_indicator = fold_indicator.into_any_element();
733 let available_space = size(
734 AvailableSpace::MinContent,
735 AvailableSpace::Definite(line_height * 0.55),
736 );
737 let fold_indicator_size = fold_indicator.measure(available_space, cx);
738
739 let position = point(
740 bounds.size.width - layout.gutter_padding,
741 ix as f32 * line_height - (scroll_top % line_height),
742 );
743 let centering_offset = point(
744 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
745 / 2.,
746 (line_height - fold_indicator_size.height) / 2.,
747 );
748 let origin = bounds.origin + position + centering_offset;
749 fold_indicator.draw(origin, available_space, cx);
750 }
751 }
752
753 if let Some(indicator) = layout.code_actions_indicator.take() {
754 let mut button = indicator.button.into_any_element();
755 let available_space = size(
756 AvailableSpace::MinContent,
757 AvailableSpace::Definite(line_height),
758 );
759 let indicator_size = button.measure(available_space, cx);
760
761 let mut x = Pixels::ZERO;
762 let mut y = indicator.row as f32 * line_height - scroll_top;
763 // Center indicator.
764 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
765 y += (line_height - indicator_size.height) / 2.;
766
767 button.draw(bounds.origin + point(x, y), available_space, cx);
768 }
769 });
770 }
771
772 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
773 let line_height = layout.position_map.line_height;
774
775 let scroll_position = layout.position_map.snapshot.scroll_position();
776 let scroll_top = scroll_position.y * line_height;
777
778 for hunk in &layout.display_hunks {
779 let (display_row_range, status) = match hunk {
780 //TODO: This rendering is entirely a horrible hack
781 &DisplayDiffHunk::Folded { display_row: row } => {
782 let start_y = row as f32 * line_height - scroll_top;
783 let end_y = start_y + line_height;
784
785 let width = 0.275 * line_height;
786 let highlight_origin = bounds.origin + point(-width, start_y);
787 let highlight_size = size(width * 2., end_y - start_y);
788 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
789 cx.paint_quad(quad(
790 highlight_bounds,
791 Corners::all(1. * line_height),
792 gpui::yellow(), // todo!("use the right color")
793 Edges::default(),
794 transparent_black(),
795 ));
796
797 continue;
798 }
799
800 DisplayDiffHunk::Unfolded {
801 display_row_range,
802 status,
803 } => (display_row_range, status),
804 };
805
806 let color = match status {
807 DiffHunkStatus::Added => cx.theme().status().created,
808 DiffHunkStatus::Modified => cx.theme().status().modified,
809
810 //TODO: This rendering is entirely a horrible hack
811 DiffHunkStatus::Removed => {
812 let row = display_row_range.start;
813
814 let offset = line_height / 2.;
815 let start_y = row as f32 * line_height - offset - scroll_top;
816 let end_y = start_y + line_height;
817
818 let width = 0.275 * line_height;
819 let highlight_origin = bounds.origin + point(-width, start_y);
820 let highlight_size = size(width * 2., end_y - start_y);
821 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
822 cx.paint_quad(quad(
823 highlight_bounds,
824 Corners::all(1. * line_height),
825 cx.theme().status().deleted,
826 Edges::default(),
827 transparent_black(),
828 ));
829
830 continue;
831 }
832 };
833
834 let start_row = display_row_range.start;
835 let end_row = display_row_range.end;
836
837 let start_y = start_row as f32 * line_height - scroll_top;
838 let end_y = end_row as f32 * line_height - scroll_top;
839
840 let width = 0.275 * line_height;
841 let highlight_origin = bounds.origin + point(-width, start_y);
842 let highlight_size = size(width * 2., end_y - start_y);
843 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
844 cx.paint_quad(quad(
845 highlight_bounds,
846 Corners::all(0.05 * line_height),
847 color, // todo!("use the right color")
848 Edges::default(),
849 transparent_black(),
850 ));
851 }
852 }
853
854 fn paint_text(
855 &mut self,
856 text_bounds: Bounds<Pixels>,
857 layout: &mut LayoutState,
858 cx: &mut WindowContext,
859 ) {
860 let scroll_position = layout.position_map.snapshot.scroll_position();
861 let start_row = layout.visible_display_row_range.start;
862 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
863 let line_end_overshoot = 0.15 * layout.position_map.line_height;
864 let whitespace_setting = self
865 .editor
866 .read(cx)
867 .buffer
868 .read(cx)
869 .settings_at(0, cx)
870 .show_whitespaces;
871
872 cx.with_content_mask(
873 Some(ContentMask {
874 bounds: text_bounds,
875 }),
876 |cx| {
877 if text_bounds.contains(&cx.mouse_position()) {
878 if self
879 .editor
880 .read(cx)
881 .link_go_to_definition_state
882 .definitions
883 .is_empty()
884 {
885 cx.set_cursor_style(CursorStyle::IBeam);
886 } else {
887 cx.set_cursor_style(CursorStyle::PointingHand);
888 }
889 }
890
891 let fold_corner_radius = 0.15 * layout.position_map.line_height;
892 cx.with_element_id(Some("folds"), |cx| {
893 let snapshot = &layout.position_map.snapshot;
894 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
895 let fold_range = fold.range.clone();
896 let display_range = fold.range.start.to_display_point(&snapshot)
897 ..fold.range.end.to_display_point(&snapshot);
898 debug_assert_eq!(display_range.start.row(), display_range.end.row());
899 let row = display_range.start.row();
900
901 let line_layout = &layout.position_map.line_layouts
902 [(row - layout.visible_display_row_range.start) as usize]
903 .line;
904 let start_x = content_origin.x
905 + line_layout.x_for_index(display_range.start.column() as usize)
906 - layout.position_map.scroll_position.x;
907 let start_y = content_origin.y
908 + row as f32 * layout.position_map.line_height
909 - layout.position_map.scroll_position.y;
910 let end_x = content_origin.x
911 + line_layout.x_for_index(display_range.end.column() as usize)
912 - layout.position_map.scroll_position.x;
913
914 let fold_bounds = Bounds {
915 origin: point(start_x, start_y),
916 size: size(end_x - start_x, layout.position_map.line_height),
917 };
918
919 let fold_background = cx.with_z_index(1, |cx| {
920 div()
921 .id(fold.id)
922 .size_full()
923 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
924 .on_click(cx.listener_for(
925 &self.editor,
926 move |editor: &mut Editor, _, cx| {
927 editor.unfold_ranges(
928 [fold_range.start..fold_range.end],
929 true,
930 false,
931 cx,
932 );
933 cx.stop_propagation();
934 },
935 ))
936 .draw(
937 fold_bounds.origin,
938 fold_bounds.size,
939 cx,
940 |fold_element_state, cx| {
941 if fold_element_state.is_active() {
942 gpui::blue()
943 } else if fold_bounds.contains(&cx.mouse_position()) {
944 gpui::black()
945 } else {
946 gpui::red()
947 }
948 },
949 )
950 });
951
952 self.paint_highlighted_range(
953 display_range.clone(),
954 fold_background,
955 fold_corner_radius,
956 fold_corner_radius * 2.,
957 layout,
958 content_origin,
959 text_bounds,
960 cx,
961 );
962 }
963 });
964
965 for (range, color) in &layout.highlighted_ranges {
966 self.paint_highlighted_range(
967 range.clone(),
968 *color,
969 Pixels::ZERO,
970 line_end_overshoot,
971 layout,
972 content_origin,
973 text_bounds,
974 cx,
975 );
976 }
977
978 let mut cursors = SmallVec::<[Cursor; 32]>::new();
979 let corner_radius = 0.15 * layout.position_map.line_height;
980 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
981
982 for (selection_style, selections) in &layout.selections {
983 for selection in selections {
984 self.paint_highlighted_range(
985 selection.range.clone(),
986 selection_style.selection,
987 corner_radius,
988 corner_radius * 2.,
989 layout,
990 content_origin,
991 text_bounds,
992 cx,
993 );
994
995 if selection.is_local && !selection.range.is_empty() {
996 invisible_display_ranges.push(selection.range.clone());
997 }
998
999 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1000 let cursor_position = selection.head;
1001 if layout
1002 .visible_display_row_range
1003 .contains(&cursor_position.row())
1004 {
1005 let cursor_row_layout = &layout.position_map.line_layouts
1006 [(cursor_position.row() - start_row) as usize]
1007 .line;
1008 let cursor_column = cursor_position.column() as usize;
1009
1010 let cursor_character_x =
1011 cursor_row_layout.x_for_index(cursor_column);
1012 let mut block_width = cursor_row_layout
1013 .x_for_index(cursor_column + 1)
1014 - cursor_character_x;
1015 if block_width == Pixels::ZERO {
1016 block_width = layout.position_map.em_width;
1017 }
1018 let block_text = if let CursorShape::Block = selection.cursor_shape
1019 {
1020 layout
1021 .position_map
1022 .snapshot
1023 .chars_at(cursor_position)
1024 .next()
1025 .and_then(|(character, _)| {
1026 // todo!() currently shape_line panics if text conatins newlines
1027 let text = if character == '\n' {
1028 SharedString::from(" ")
1029 } else {
1030 SharedString::from(character.to_string())
1031 };
1032 let len = text.len();
1033 cx.text_system()
1034 .shape_line(
1035 text,
1036 cursor_row_layout.font_size,
1037 &[TextRun {
1038 len,
1039 font: self.style.text.font(),
1040 color: self.style.background,
1041 background_color: None,
1042 underline: None,
1043 }],
1044 )
1045 .log_err()
1046 })
1047 } else {
1048 None
1049 };
1050
1051 let x = cursor_character_x - layout.position_map.scroll_position.x;
1052 let y = cursor_position.row() as f32
1053 * layout.position_map.line_height
1054 - layout.position_map.scroll_position.y;
1055 if selection.is_newest {
1056 self.editor.update(cx, |editor, _| {
1057 editor.pixel_position_of_newest_cursor = Some(point(
1058 text_bounds.origin.x + x + block_width / 2.,
1059 text_bounds.origin.y
1060 + y
1061 + layout.position_map.line_height / 2.,
1062 ))
1063 });
1064 }
1065 cursors.push(Cursor {
1066 color: selection_style.cursor,
1067 block_width,
1068 origin: point(x, y),
1069 line_height: layout.position_map.line_height,
1070 shape: selection.cursor_shape,
1071 block_text,
1072 });
1073 }
1074 }
1075 }
1076 }
1077
1078 for (ix, line_with_invisibles) in
1079 layout.position_map.line_layouts.iter().enumerate()
1080 {
1081 let row = start_row + ix as u32;
1082 line_with_invisibles.draw(
1083 layout,
1084 row,
1085 content_origin,
1086 whitespace_setting,
1087 &invisible_display_ranges,
1088 cx,
1089 )
1090 }
1091
1092 cx.with_z_index(0, |cx| {
1093 for cursor in cursors {
1094 cursor.paint(content_origin, cx);
1095 }
1096 });
1097 },
1098 )
1099 }
1100
1101 fn paint_overlays(
1102 &mut self,
1103 text_bounds: Bounds<Pixels>,
1104 layout: &mut LayoutState,
1105 cx: &mut WindowContext,
1106 ) {
1107 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1108 let start_row = layout.visible_display_row_range.start;
1109 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1110 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1111 let context_menu_size = context_menu.measure(available_space, cx);
1112
1113 let cursor_row_layout =
1114 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1115 let x = cursor_row_layout.x_for_index(position.column() as usize)
1116 - layout.position_map.scroll_position.x;
1117 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1118 - layout.position_map.scroll_position.y;
1119 let mut list_origin = content_origin + point(x, y);
1120 let list_width = context_menu_size.width;
1121 let list_height = context_menu_size.height;
1122
1123 // Snap the right edge of the list to the right edge of the window if
1124 // its horizontal bounds overflow.
1125 if list_origin.x + list_width > cx.viewport_size().width {
1126 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1127 }
1128
1129 if list_origin.y + list_height > text_bounds.lower_right().y {
1130 list_origin.y -= layout.position_map.line_height + list_height;
1131 }
1132
1133 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1134 }
1135
1136 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1137 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1138
1139 // This is safe because we check on layout whether the required row is available
1140 let hovered_row_layout =
1141 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1142
1143 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1144 // height. This is the size we will use to decide whether to render popovers above or below
1145 // the hovered line.
1146 let first_size = hover_popovers[0].measure(available_space, cx);
1147 let height_to_reserve =
1148 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1149
1150 // Compute Hovered Point
1151 let x = hovered_row_layout.x_for_index(position.column() as usize)
1152 - layout.position_map.scroll_position.x;
1153 let y = position.row() as f32 * layout.position_map.line_height
1154 - layout.position_map.scroll_position.y;
1155 let hovered_point = content_origin + point(x, y);
1156
1157 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1158 // There is enough space above. Render popovers above the hovered point
1159 let mut current_y = hovered_point.y;
1160 for mut hover_popover in hover_popovers {
1161 let size = hover_popover.measure(available_space, cx);
1162 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1163
1164 let x_out_of_bounds =
1165 text_bounds.upper_right().x - (popover_origin.x + size.width);
1166 if x_out_of_bounds < Pixels::ZERO {
1167 popover_origin.x = popover_origin.x + x_out_of_bounds;
1168 }
1169
1170 cx.break_content_mask(|cx| {
1171 hover_popover.draw(popover_origin, available_space, cx)
1172 });
1173
1174 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1175 }
1176 } else {
1177 // There is not enough space above. Render popovers below the hovered point
1178 let mut current_y = hovered_point.y + layout.position_map.line_height;
1179 for mut hover_popover in hover_popovers {
1180 let size = hover_popover.measure(available_space, cx);
1181 let mut popover_origin = point(hovered_point.x, current_y);
1182
1183 let x_out_of_bounds =
1184 text_bounds.upper_right().x - (popover_origin.x + size.width);
1185 if x_out_of_bounds < Pixels::ZERO {
1186 popover_origin.x = popover_origin.x + x_out_of_bounds;
1187 }
1188
1189 hover_popover.draw(popover_origin, available_space, cx);
1190
1191 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1192 }
1193 }
1194 }
1195
1196 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1197 let element = overlay()
1198 .position(mouse_context_menu.position)
1199 .child(mouse_context_menu.context_menu.clone())
1200 .anchor(AnchorCorner::TopLeft)
1201 .snap_to_window();
1202 element.draw(
1203 gpui::Point::default(),
1204 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1205 cx,
1206 |_, _| {},
1207 );
1208 }
1209 }
1210
1211 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1212 bounds.upper_right().x - self.style.scrollbar_width
1213 }
1214
1215 fn paint_scrollbar(
1216 &mut self,
1217 bounds: Bounds<Pixels>,
1218 layout: &mut LayoutState,
1219 cx: &mut WindowContext,
1220 ) {
1221 if layout.mode != EditorMode::Full {
1222 return;
1223 }
1224
1225 let top = bounds.origin.y;
1226 let bottom = bounds.lower_left().y;
1227 let right = bounds.lower_right().x;
1228 let left = self.scrollbar_left(&bounds);
1229 let row_range = layout.scrollbar_row_range.clone();
1230 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1231
1232 let mut height = bounds.size.height;
1233 let mut first_row_y_offset = px(0.0);
1234
1235 // Impose a minimum height on the scrollbar thumb
1236 let row_height = height / max_row;
1237 let min_thumb_height = layout.position_map.line_height;
1238 let thumb_height = (row_range.end - row_range.start) * row_height;
1239 if thumb_height < min_thumb_height {
1240 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1241 height -= min_thumb_height - thumb_height;
1242 }
1243
1244 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1245
1246 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1247 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1248 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1249 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1250
1251 if layout.show_scrollbars {
1252 cx.paint_quad(quad(
1253 track_bounds,
1254 Corners::default(),
1255 cx.theme().colors().scrollbar_track_background,
1256 Edges {
1257 top: Pixels::ZERO,
1258 right: Pixels::ZERO,
1259 bottom: Pixels::ZERO,
1260 left: px(1.),
1261 },
1262 cx.theme().colors().scrollbar_track_border,
1263 ));
1264 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1265 if layout.is_singleton && scrollbar_settings.selections {
1266 let start_anchor = Anchor::min();
1267 let end_anchor = Anchor::max();
1268 let background_ranges = self
1269 .editor
1270 .read(cx)
1271 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1272 start_anchor..end_anchor,
1273 &layout.position_map.snapshot,
1274 50000,
1275 );
1276 for range in background_ranges {
1277 let start_y = y_for_row(range.start().row() as f32);
1278 let mut end_y = y_for_row(range.end().row() as f32);
1279 if end_y - start_y < px(1.) {
1280 end_y = start_y + px(1.);
1281 }
1282 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1283 cx.paint_quad(quad(
1284 bounds,
1285 Corners::default(),
1286 cx.theme().status().info,
1287 Edges {
1288 top: Pixels::ZERO,
1289 right: px(1.),
1290 bottom: Pixels::ZERO,
1291 left: px(1.),
1292 },
1293 cx.theme().colors().scrollbar_thumb_border,
1294 ));
1295 }
1296 }
1297
1298 if layout.is_singleton && scrollbar_settings.git_diff {
1299 for hunk in layout
1300 .position_map
1301 .snapshot
1302 .buffer_snapshot
1303 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1304 {
1305 let start_display = Point::new(hunk.buffer_range.start, 0)
1306 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1307 let end_display = Point::new(hunk.buffer_range.end, 0)
1308 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1309 let start_y = y_for_row(start_display.row() as f32);
1310 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1311 y_for_row((end_display.row() + 1) as f32)
1312 } else {
1313 y_for_row((end_display.row()) as f32)
1314 };
1315
1316 if end_y - start_y < px(1.) {
1317 end_y = start_y + px(1.);
1318 }
1319 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1320
1321 let color = match hunk.status() {
1322 DiffHunkStatus::Added => cx.theme().status().created,
1323 DiffHunkStatus::Modified => cx.theme().status().modified,
1324 DiffHunkStatus::Removed => cx.theme().status().deleted,
1325 };
1326 cx.paint_quad(quad(
1327 bounds,
1328 Corners::default(),
1329 color,
1330 Edges {
1331 top: Pixels::ZERO,
1332 right: px(1.),
1333 bottom: Pixels::ZERO,
1334 left: px(1.),
1335 },
1336 cx.theme().colors().scrollbar_thumb_border,
1337 ));
1338 }
1339 }
1340
1341 cx.paint_quad(quad(
1342 thumb_bounds,
1343 Corners::default(),
1344 cx.theme().colors().scrollbar_thumb_background,
1345 Edges {
1346 top: Pixels::ZERO,
1347 right: px(1.),
1348 bottom: Pixels::ZERO,
1349 left: px(1.),
1350 },
1351 cx.theme().colors().scrollbar_thumb_border,
1352 ));
1353 }
1354
1355 let mouse_position = cx.mouse_position();
1356 if track_bounds.contains(&mouse_position) {
1357 cx.set_cursor_style(CursorStyle::Arrow);
1358 }
1359
1360 cx.on_mouse_event({
1361 let editor = self.editor.clone();
1362 move |event: &MouseMoveEvent, phase, cx| {
1363 if phase == DispatchPhase::Capture {
1364 return;
1365 }
1366
1367 editor.update(cx, |editor, cx| {
1368 if event.pressed_button == Some(MouseButton::Left)
1369 && editor.scroll_manager.is_dragging_scrollbar()
1370 {
1371 let y = mouse_position.y;
1372 let new_y = event.position.y;
1373 if thumb_top < y && y < thumb_bottom {
1374 let mut position = editor.scroll_position(cx);
1375 position.y += (new_y - y) * (max_row as f32) / height;
1376 if position.y < 0.0 {
1377 position.y = 0.0;
1378 }
1379 editor.set_scroll_position(position, cx);
1380 }
1381 cx.stop_propagation();
1382 } else {
1383 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1384 if track_bounds.contains(&event.position) {
1385 editor.scroll_manager.show_scrollbar(cx);
1386 }
1387 }
1388 })
1389 }
1390 });
1391
1392 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1393 cx.on_mouse_event({
1394 let editor = self.editor.clone();
1395 move |event: &MouseUpEvent, phase, cx| {
1396 editor.update(cx, |editor, cx| {
1397 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1398 cx.stop_propagation();
1399 });
1400 }
1401 });
1402 } else {
1403 cx.on_mouse_event({
1404 let editor = self.editor.clone();
1405 move |event: &MouseDownEvent, phase, cx| {
1406 editor.update(cx, |editor, cx| {
1407 if track_bounds.contains(&event.position) {
1408 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1409
1410 let y = event.position.y;
1411 if y < thumb_top || thumb_bottom < y {
1412 let center_row =
1413 ((y - top) * max_row as f32 / height).round() as u32;
1414 let top_row = center_row
1415 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1416 let mut position = editor.scroll_position(cx);
1417 position.y = top_row as f32;
1418 editor.set_scroll_position(position, cx);
1419 } else {
1420 editor.scroll_manager.show_scrollbar(cx);
1421 }
1422
1423 cx.stop_propagation();
1424 }
1425 });
1426 }
1427 });
1428 }
1429 }
1430
1431 #[allow(clippy::too_many_arguments)]
1432 fn paint_highlighted_range(
1433 &self,
1434 range: Range<DisplayPoint>,
1435 color: Hsla,
1436 corner_radius: Pixels,
1437 line_end_overshoot: Pixels,
1438 layout: &LayoutState,
1439 content_origin: gpui::Point<Pixels>,
1440 bounds: Bounds<Pixels>,
1441 cx: &mut WindowContext,
1442 ) {
1443 let start_row = layout.visible_display_row_range.start;
1444 let end_row = layout.visible_display_row_range.end;
1445 if range.start != range.end {
1446 let row_range = if range.end.column() == 0 {
1447 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1448 } else {
1449 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1450 };
1451
1452 let highlighted_range = HighlightedRange {
1453 color,
1454 line_height: layout.position_map.line_height,
1455 corner_radius,
1456 start_y: content_origin.y
1457 + row_range.start as f32 * layout.position_map.line_height
1458 - layout.position_map.scroll_position.y,
1459 lines: row_range
1460 .into_iter()
1461 .map(|row| {
1462 let line_layout =
1463 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1464 HighlightedRangeLine {
1465 start_x: if row == range.start.row() {
1466 content_origin.x
1467 + line_layout.x_for_index(range.start.column() as usize)
1468 - layout.position_map.scroll_position.x
1469 } else {
1470 content_origin.x - layout.position_map.scroll_position.x
1471 },
1472 end_x: if row == range.end.row() {
1473 content_origin.x
1474 + line_layout.x_for_index(range.end.column() as usize)
1475 - layout.position_map.scroll_position.x
1476 } else {
1477 content_origin.x + line_layout.width + line_end_overshoot
1478 - layout.position_map.scroll_position.x
1479 },
1480 }
1481 })
1482 .collect(),
1483 };
1484
1485 highlighted_range.paint(bounds, cx);
1486 }
1487 }
1488
1489 fn paint_blocks(
1490 &mut self,
1491 bounds: Bounds<Pixels>,
1492 layout: &mut LayoutState,
1493 cx: &mut WindowContext,
1494 ) {
1495 let scroll_position = layout.position_map.snapshot.scroll_position();
1496 let scroll_left = scroll_position.x * layout.position_map.em_width;
1497 let scroll_top = scroll_position.y * layout.position_map.line_height;
1498
1499 for block in layout.blocks.drain(..) {
1500 let mut origin = bounds.origin
1501 + point(
1502 Pixels::ZERO,
1503 block.row as f32 * layout.position_map.line_height - scroll_top,
1504 );
1505 if !matches!(block.style, BlockStyle::Sticky) {
1506 origin += point(-scroll_left, Pixels::ZERO);
1507 }
1508 block.element.draw(origin, block.available_space, cx);
1509 }
1510 }
1511
1512 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1513 let style = &self.style;
1514 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1515 let layout = cx
1516 .text_system()
1517 .shape_line(
1518 SharedString::from(" ".repeat(column)),
1519 font_size,
1520 &[TextRun {
1521 len: column,
1522 font: style.text.font(),
1523 color: Hsla::default(),
1524 background_color: None,
1525 underline: None,
1526 }],
1527 )
1528 .unwrap();
1529
1530 layout.width
1531 }
1532
1533 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1534 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1535 self.column_pixels(digit_count, cx)
1536 }
1537
1538 //Folds contained in a hunk are ignored apart from shrinking visual size
1539 //If a fold contains any hunks then that fold line is marked as modified
1540 fn layout_git_gutters(
1541 &self,
1542 display_rows: Range<u32>,
1543 snapshot: &EditorSnapshot,
1544 ) -> Vec<DisplayDiffHunk> {
1545 let buffer_snapshot = &snapshot.buffer_snapshot;
1546
1547 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1548 .to_point(snapshot)
1549 .row;
1550 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1551 .to_point(snapshot)
1552 .row;
1553
1554 buffer_snapshot
1555 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1556 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1557 .dedup()
1558 .collect()
1559 }
1560
1561 fn calculate_relative_line_numbers(
1562 &self,
1563 snapshot: &EditorSnapshot,
1564 rows: &Range<u32>,
1565 relative_to: Option<u32>,
1566 ) -> HashMap<u32, u32> {
1567 let mut relative_rows: HashMap<u32, u32> = Default::default();
1568 let Some(relative_to) = relative_to else {
1569 return relative_rows;
1570 };
1571
1572 let start = rows.start.min(relative_to);
1573 let end = rows.end.max(relative_to);
1574
1575 let buffer_rows = snapshot
1576 .buffer_rows(start)
1577 .take(1 + (end - start) as usize)
1578 .collect::<Vec<_>>();
1579
1580 let head_idx = relative_to - start;
1581 let mut delta = 1;
1582 let mut i = head_idx + 1;
1583 while i < buffer_rows.len() as u32 {
1584 if buffer_rows[i as usize].is_some() {
1585 if rows.contains(&(i + start)) {
1586 relative_rows.insert(i + start, delta);
1587 }
1588 delta += 1;
1589 }
1590 i += 1;
1591 }
1592 delta = 1;
1593 i = head_idx.min(buffer_rows.len() as u32 - 1);
1594 while i > 0 && buffer_rows[i as usize].is_none() {
1595 i -= 1;
1596 }
1597
1598 while i > 0 {
1599 i -= 1;
1600 if buffer_rows[i as usize].is_some() {
1601 if rows.contains(&(i + start)) {
1602 relative_rows.insert(i + start, delta);
1603 }
1604 delta += 1;
1605 }
1606 }
1607
1608 relative_rows
1609 }
1610
1611 fn shape_line_numbers(
1612 &self,
1613 rows: Range<u32>,
1614 active_rows: &BTreeMap<u32, bool>,
1615 newest_selection_head: DisplayPoint,
1616 is_singleton: bool,
1617 snapshot: &EditorSnapshot,
1618 cx: &ViewContext<Editor>,
1619 ) -> (
1620 Vec<Option<ShapedLine>>,
1621 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1622 ) {
1623 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1624 let include_line_numbers = snapshot.mode == EditorMode::Full;
1625 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1626 let mut fold_statuses = Vec::with_capacity(rows.len());
1627 let mut line_number = String::new();
1628 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1629 let relative_to = if is_relative {
1630 Some(newest_selection_head.row())
1631 } else {
1632 None
1633 };
1634
1635 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1636
1637 for (ix, row) in snapshot
1638 .buffer_rows(rows.start)
1639 .take((rows.end - rows.start) as usize)
1640 .enumerate()
1641 {
1642 let display_row = rows.start + ix as u32;
1643 let (active, color) = if active_rows.contains_key(&display_row) {
1644 (true, cx.theme().colors().editor_active_line_number)
1645 } else {
1646 (false, cx.theme().colors().editor_line_number)
1647 };
1648 if let Some(buffer_row) = row {
1649 if include_line_numbers {
1650 line_number.clear();
1651 let default_number = buffer_row + 1;
1652 let number = relative_rows
1653 .get(&(ix as u32 + rows.start))
1654 .unwrap_or(&default_number);
1655 write!(&mut line_number, "{}", number).unwrap();
1656 let run = TextRun {
1657 len: line_number.len(),
1658 font: self.style.text.font(),
1659 color,
1660 background_color: None,
1661 underline: None,
1662 };
1663 let shaped_line = cx
1664 .text_system()
1665 .shape_line(line_number.clone().into(), font_size, &[run])
1666 .unwrap();
1667 shaped_line_numbers.push(Some(shaped_line));
1668 fold_statuses.push(
1669 is_singleton
1670 .then(|| {
1671 snapshot
1672 .fold_for_line(buffer_row)
1673 .map(|fold_status| (fold_status, buffer_row, active))
1674 })
1675 .flatten(),
1676 )
1677 }
1678 } else {
1679 fold_statuses.push(None);
1680 shaped_line_numbers.push(None);
1681 }
1682 }
1683
1684 (shaped_line_numbers, fold_statuses)
1685 }
1686
1687 fn layout_lines(
1688 &self,
1689 rows: Range<u32>,
1690 line_number_layouts: &[Option<ShapedLine>],
1691 snapshot: &EditorSnapshot,
1692 cx: &ViewContext<Editor>,
1693 ) -> Vec<LineWithInvisibles> {
1694 if rows.start >= rows.end {
1695 return Vec::new();
1696 }
1697
1698 // When the editor is empty and unfocused, then show the placeholder.
1699 if snapshot.is_empty() {
1700 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1701 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1702 let placeholder_text = snapshot.placeholder_text();
1703 let placeholder_lines = placeholder_text
1704 .as_ref()
1705 .map_or("", AsRef::as_ref)
1706 .split('\n')
1707 .skip(rows.start as usize)
1708 .chain(iter::repeat(""))
1709 .take(rows.len());
1710 placeholder_lines
1711 .filter_map(move |line| {
1712 let run = TextRun {
1713 len: line.len(),
1714 font: self.style.text.font(),
1715 color: placeholder_color,
1716 background_color: None,
1717 underline: Default::default(),
1718 };
1719 cx.text_system()
1720 .shape_line(line.to_string().into(), font_size, &[run])
1721 .log_err()
1722 })
1723 .map(|line| LineWithInvisibles {
1724 line,
1725 invisibles: Vec::new(),
1726 })
1727 .collect()
1728 } else {
1729 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1730 LineWithInvisibles::from_chunks(
1731 chunks,
1732 &self.style.text,
1733 MAX_LINE_LEN,
1734 rows.len() as usize,
1735 line_number_layouts,
1736 snapshot.mode,
1737 cx,
1738 )
1739 }
1740 }
1741
1742 fn compute_layout(
1743 &mut self,
1744 mut bounds: Bounds<Pixels>,
1745 cx: &mut WindowContext,
1746 ) -> LayoutState {
1747 self.editor.update(cx, |editor, cx| {
1748 let snapshot = editor.snapshot(cx);
1749 let style = self.style.clone();
1750
1751 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1752 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1753 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1754 let em_width = cx
1755 .text_system()
1756 .typographic_bounds(font_id, font_size, 'm')
1757 .unwrap()
1758 .size
1759 .width;
1760 let em_advance = cx
1761 .text_system()
1762 .advance(font_id, font_size, 'm')
1763 .unwrap()
1764 .width;
1765
1766 let gutter_padding;
1767 let gutter_width;
1768 let gutter_margin;
1769 if snapshot.show_gutter {
1770 let descent = cx.text_system().descent(font_id, font_size);
1771
1772 let gutter_padding_factor = 3.5;
1773 gutter_padding = (em_width * gutter_padding_factor).round();
1774 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1775 gutter_margin = -descent;
1776 } else {
1777 gutter_padding = Pixels::ZERO;
1778 gutter_width = Pixels::ZERO;
1779 gutter_margin = Pixels::ZERO;
1780 };
1781
1782 editor.gutter_width = gutter_width;
1783
1784 let text_width = bounds.size.width - gutter_width;
1785 let overscroll = size(em_width, px(0.));
1786 let snapshot = {
1787 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1788
1789 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1790 let wrap_width = match editor.soft_wrap_mode(cx) {
1791 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1792 SoftWrap::EditorWidth => editor_width,
1793 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1794 };
1795
1796 if editor.set_wrap_width(Some(wrap_width), cx) {
1797 editor.snapshot(cx)
1798 } else {
1799 snapshot
1800 }
1801 };
1802
1803 let wrap_guides = editor
1804 .wrap_guides(cx)
1805 .iter()
1806 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1807 .collect::<SmallVec<[_; 2]>>();
1808
1809 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1810 let gutter_size = size(gutter_width, bounds.size.height);
1811 let text_size = size(text_width, bounds.size.height);
1812
1813 let autoscroll_horizontally =
1814 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1815 let mut snapshot = editor.snapshot(cx);
1816
1817 let scroll_position = snapshot.scroll_position();
1818 // The scroll position is a fractional point, the whole number of which represents
1819 // the top of the window in terms of display rows.
1820 let start_row = scroll_position.y as u32;
1821 let height_in_lines = f32::from(bounds.size.height / line_height);
1822 let max_row = snapshot.max_point().row();
1823
1824 // Add 1 to ensure selections bleed off screen
1825 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1826
1827 let start_anchor = if start_row == 0 {
1828 Anchor::min()
1829 } else {
1830 snapshot
1831 .buffer_snapshot
1832 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1833 };
1834 let end_anchor = if end_row > max_row {
1835 Anchor::max()
1836 } else {
1837 snapshot
1838 .buffer_snapshot
1839 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1840 };
1841
1842 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1843 let mut active_rows = BTreeMap::new();
1844 let is_singleton = editor.is_singleton(cx);
1845
1846 let highlighted_rows = editor.highlighted_rows();
1847 let highlighted_ranges = editor.background_highlights_in_range(
1848 start_anchor..end_anchor,
1849 &snapshot.display_snapshot,
1850 cx.theme().colors(),
1851 );
1852
1853 let mut newest_selection_head = None;
1854
1855 if editor.show_local_selections {
1856 let mut local_selections: Vec<Selection<Point>> = editor
1857 .selections
1858 .disjoint_in_range(start_anchor..end_anchor, cx);
1859 local_selections.extend(editor.selections.pending(cx));
1860 let mut layouts = Vec::new();
1861 let newest = editor.selections.newest(cx);
1862 for selection in local_selections.drain(..) {
1863 let is_empty = selection.start == selection.end;
1864 let is_newest = selection == newest;
1865
1866 let layout = SelectionLayout::new(
1867 selection,
1868 editor.selections.line_mode,
1869 editor.cursor_shape,
1870 &snapshot.display_snapshot,
1871 is_newest,
1872 true,
1873 );
1874 if is_newest {
1875 newest_selection_head = Some(layout.head);
1876 }
1877
1878 for row in cmp::max(layout.active_rows.start, start_row)
1879 ..=cmp::min(layout.active_rows.end, end_row)
1880 {
1881 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1882 *contains_non_empty_selection |= !is_empty;
1883 }
1884 layouts.push(layout);
1885 }
1886
1887 selections.push((style.local_player, layouts));
1888 }
1889
1890 if let Some(collaboration_hub) = &editor.collaboration_hub {
1891 // When following someone, render the local selections in their color.
1892 if let Some(leader_id) = editor.leader_peer_id {
1893 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1894 if let Some(participant_index) = collaboration_hub
1895 .user_participant_indices(cx)
1896 .get(&collaborator.user_id)
1897 {
1898 if let Some((local_selection_style, _)) = selections.first_mut() {
1899 *local_selection_style = cx
1900 .theme()
1901 .players()
1902 .color_for_participant(participant_index.0);
1903 }
1904 }
1905 }
1906 }
1907
1908 let mut remote_selections = HashMap::default();
1909 for selection in snapshot.remote_selections_in_range(
1910 &(start_anchor..end_anchor),
1911 collaboration_hub.as_ref(),
1912 cx,
1913 ) {
1914 let selection_style = if let Some(participant_index) = selection.participant_index {
1915 cx.theme()
1916 .players()
1917 .color_for_participant(participant_index.0)
1918 } else {
1919 cx.theme().players().absent()
1920 };
1921
1922 // Don't re-render the leader's selections, since the local selections
1923 // match theirs.
1924 if Some(selection.peer_id) == editor.leader_peer_id {
1925 continue;
1926 }
1927
1928 remote_selections
1929 .entry(selection.replica_id)
1930 .or_insert((selection_style, Vec::new()))
1931 .1
1932 .push(SelectionLayout::new(
1933 selection.selection,
1934 selection.line_mode,
1935 selection.cursor_shape,
1936 &snapshot.display_snapshot,
1937 false,
1938 false,
1939 ));
1940 }
1941
1942 selections.extend(remote_selections.into_values());
1943 }
1944
1945 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1946 let show_scrollbars = match scrollbar_settings.show {
1947 ShowScrollbar::Auto => {
1948 // Git
1949 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1950 ||
1951 // Selections
1952 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1953 // Scrollmanager
1954 || editor.scroll_manager.scrollbars_visible()
1955 }
1956 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1957 ShowScrollbar::Always => true,
1958 ShowScrollbar::Never => false,
1959 };
1960
1961 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1962 let newest = editor.selections.newest::<Point>(cx);
1963 SelectionLayout::new(
1964 newest,
1965 editor.selections.line_mode,
1966 editor.cursor_shape,
1967 &snapshot.display_snapshot,
1968 true,
1969 true,
1970 )
1971 .head
1972 });
1973
1974 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1975 start_row..end_row,
1976 &active_rows,
1977 head_for_relative,
1978 is_singleton,
1979 &snapshot,
1980 cx,
1981 );
1982
1983 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1984
1985 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1986
1987 let mut max_visible_line_width = Pixels::ZERO;
1988 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1989 for line_with_invisibles in &line_layouts {
1990 if line_with_invisibles.line.width > max_visible_line_width {
1991 max_visible_line_width = line_with_invisibles.line.width;
1992 }
1993 }
1994
1995 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
1996 .unwrap()
1997 .width;
1998 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
1999
2000 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2001 self.layout_blocks(
2002 start_row..end_row,
2003 &snapshot,
2004 bounds.size.width,
2005 scroll_width,
2006 gutter_padding,
2007 gutter_width,
2008 em_width,
2009 gutter_width + gutter_margin,
2010 line_height,
2011 &style,
2012 &line_layouts,
2013 editor,
2014 cx,
2015 )
2016 });
2017
2018 let scroll_max = point(
2019 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2020 max_row as f32,
2021 );
2022
2023 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2024
2025 let autoscrolled = if autoscroll_horizontally {
2026 editor.autoscroll_horizontally(
2027 start_row,
2028 text_size.width,
2029 scroll_width,
2030 em_width,
2031 &line_layouts,
2032 cx,
2033 )
2034 } else {
2035 false
2036 };
2037
2038 if clamped || autoscrolled {
2039 snapshot = editor.snapshot(cx);
2040 }
2041
2042 let mut context_menu = None;
2043 let mut code_actions_indicator = None;
2044 if let Some(newest_selection_head) = newest_selection_head {
2045 if (start_row..end_row).contains(&newest_selection_head.row()) {
2046 if editor.context_menu_visible() {
2047 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2048 context_menu =
2049 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2050 }
2051
2052 let active = matches!(
2053 editor.context_menu.read().as_ref(),
2054 Some(crate::ContextMenu::CodeActions(_))
2055 );
2056
2057 code_actions_indicator = editor
2058 .render_code_actions_indicator(&style, active, cx)
2059 .map(|element| CodeActionsIndicator {
2060 row: newest_selection_head.row(),
2061 button: element,
2062 });
2063 }
2064 }
2065
2066 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2067 let max_size = size(
2068 (120. * em_width) // Default size
2069 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2070 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2071 (16. * line_height) // Default size
2072 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2073 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2074 );
2075
2076 let mut hover = editor.hover_state.render(
2077 &snapshot,
2078 &style,
2079 visible_rows,
2080 max_size,
2081 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2082 cx,
2083 );
2084
2085 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2086 editor.render_fold_indicators(
2087 fold_statuses,
2088 &style,
2089 editor.gutter_hovered,
2090 line_height,
2091 gutter_margin,
2092 cx,
2093 )
2094 });
2095
2096 let invisible_symbol_font_size = font_size / 2.;
2097 let tab_invisible = cx
2098 .text_system()
2099 .shape_line(
2100 "→".into(),
2101 invisible_symbol_font_size,
2102 &[TextRun {
2103 len: "→".len(),
2104 font: self.style.text.font(),
2105 color: cx.theme().colors().editor_invisible,
2106 background_color: None,
2107 underline: None,
2108 }],
2109 )
2110 .unwrap();
2111 let space_invisible = cx
2112 .text_system()
2113 .shape_line(
2114 "•".into(),
2115 invisible_symbol_font_size,
2116 &[TextRun {
2117 len: "•".len(),
2118 font: self.style.text.font(),
2119 color: cx.theme().colors().editor_invisible,
2120 background_color: None,
2121 underline: None,
2122 }],
2123 )
2124 .unwrap();
2125
2126 LayoutState {
2127 mode: snapshot.mode,
2128 position_map: Arc::new(PositionMap {
2129 size: bounds.size,
2130 scroll_position: point(
2131 scroll_position.x * em_width,
2132 scroll_position.y * line_height,
2133 ),
2134 scroll_max,
2135 line_layouts,
2136 line_height,
2137 em_width,
2138 em_advance,
2139 snapshot,
2140 }),
2141 visible_anchor_range: start_anchor..end_anchor,
2142 visible_display_row_range: start_row..end_row,
2143 wrap_guides,
2144 gutter_size,
2145 gutter_padding,
2146 text_size,
2147 scrollbar_row_range,
2148 show_scrollbars,
2149 is_singleton,
2150 max_row,
2151 gutter_margin,
2152 active_rows,
2153 highlighted_rows,
2154 highlighted_ranges,
2155 line_numbers,
2156 display_hunks,
2157 blocks,
2158 selections,
2159 context_menu,
2160 code_actions_indicator,
2161 fold_indicators,
2162 tab_invisible,
2163 space_invisible,
2164 hover_popovers: hover,
2165 }
2166 })
2167 }
2168
2169 #[allow(clippy::too_many_arguments)]
2170 fn layout_blocks(
2171 &self,
2172 rows: Range<u32>,
2173 snapshot: &EditorSnapshot,
2174 editor_width: Pixels,
2175 scroll_width: Pixels,
2176 gutter_padding: Pixels,
2177 gutter_width: Pixels,
2178 em_width: Pixels,
2179 text_x: Pixels,
2180 line_height: Pixels,
2181 style: &EditorStyle,
2182 line_layouts: &[LineWithInvisibles],
2183 editor: &mut Editor,
2184 cx: &mut ViewContext<Editor>,
2185 ) -> (Pixels, Vec<BlockLayout>) {
2186 let mut block_id = 0;
2187 let scroll_x = snapshot.scroll_anchor.offset.x;
2188 let (fixed_blocks, non_fixed_blocks) = snapshot
2189 .blocks_in_range(rows.clone())
2190 .partition::<Vec<_>, _>(|(_, block)| match block {
2191 TransformBlock::ExcerptHeader { .. } => false,
2192 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2193 });
2194
2195 let mut render_block = |block: &TransformBlock,
2196 available_space: Size<AvailableSpace>,
2197 block_id: usize,
2198 editor: &mut Editor,
2199 cx: &mut ViewContext<Editor>| {
2200 let mut element = match block {
2201 TransformBlock::Custom(block) => {
2202 let align_to = block
2203 .position()
2204 .to_point(&snapshot.buffer_snapshot)
2205 .to_display_point(snapshot);
2206 let anchor_x = text_x
2207 + if rows.contains(&align_to.row()) {
2208 line_layouts[(align_to.row() - rows.start) as usize]
2209 .line
2210 .x_for_index(align_to.column() as usize)
2211 } else {
2212 layout_line(align_to.row(), snapshot, style, cx)
2213 .unwrap()
2214 .x_for_index(align_to.column() as usize)
2215 };
2216
2217 block.render(&mut BlockContext {
2218 view_context: cx,
2219 anchor_x,
2220 gutter_padding,
2221 line_height,
2222 gutter_width,
2223 em_width,
2224 block_id,
2225 editor_style: &self.style,
2226 })
2227 }
2228
2229 TransformBlock::ExcerptHeader {
2230 buffer,
2231 range,
2232 starts_new_buffer,
2233 ..
2234 } => {
2235 let include_root = editor
2236 .project
2237 .as_ref()
2238 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2239 .unwrap_or_default();
2240
2241 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2242 let jump_path = ProjectPath {
2243 worktree_id: file.worktree_id(cx),
2244 path: file.path.clone(),
2245 };
2246 let jump_anchor = range
2247 .primary
2248 .as_ref()
2249 .map_or(range.context.start, |primary| primary.start);
2250 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2251
2252 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2253 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2254 });
2255
2256 jump_handler
2257 });
2258
2259 let element = if *starts_new_buffer {
2260 let path = buffer.resolve_file_path(cx, include_root);
2261 let mut filename = None;
2262 let mut parent_path = None;
2263 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2264 if let Some(path) = path {
2265 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2266 parent_path = path
2267 .parent()
2268 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2269 }
2270
2271 let is_open = true;
2272
2273 div().id("path header container").size_full().p_1p5().child(
2274 h_stack()
2275 .id("path header block")
2276 .py_1p5()
2277 .pl_3()
2278 .pr_2()
2279 .rounded_lg()
2280 .shadow_md()
2281 .border()
2282 .border_color(cx.theme().colors().border)
2283 .bg(cx.theme().colors().editor_subheader_background)
2284 .justify_between()
2285 .cursor_pointer()
2286 .hover(|style| style.bg(cx.theme().colors().element_hover))
2287 .on_click(cx.listener(|_editor, _event, _cx| {
2288 // TODO: Implement collapsing path headers
2289 todo!("Clicking path header")
2290 }))
2291 .child(
2292 h_stack()
2293 .gap_3()
2294 // TODO: Add open/close state and toggle action
2295 .child(
2296 div().border().border_color(gpui::red()).child(
2297 ButtonLike::new("path-header-disclosure-control")
2298 .style(ButtonStyle::Subtle)
2299 .child(IconElement::new(match is_open {
2300 true => Icon::ChevronDown,
2301 false => Icon::ChevronRight,
2302 })),
2303 ),
2304 )
2305 .child(
2306 h_stack()
2307 .gap_2()
2308 .child(Label::new(
2309 filename
2310 .map(SharedString::from)
2311 .unwrap_or_else(|| "untitled".into()),
2312 ))
2313 .when_some(parent_path, |then, path| {
2314 then.child(Label::new(path).color(Color::Muted))
2315 }),
2316 ),
2317 )
2318 .children(jump_handler.map(|jump_handler| {
2319 IconButton::new(block_id, Icon::ArrowUpRight)
2320 .style(ButtonStyle::Subtle)
2321 .on_click(jump_handler)
2322 .tooltip(|cx| {
2323 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2324 })
2325 })), // .p_x(gutter_padding)
2326 )
2327 } else {
2328 let text_style = style.text.clone();
2329 h_stack()
2330 .id("collapsed context")
2331 .size_full()
2332 .gap(gutter_padding)
2333 .child(
2334 h_stack()
2335 .justify_end()
2336 .flex_none()
2337 .w(gutter_width - gutter_padding)
2338 .h_full()
2339 .text_buffer(cx)
2340 .text_color(cx.theme().colors().editor_line_number)
2341 .child("..."),
2342 )
2343 .map(|this| {
2344 if let Some(jump_handler) = jump_handler {
2345 this.child(
2346 ButtonLike::new("jump to collapsed context")
2347 .style(ButtonStyle::Transparent)
2348 .full_width()
2349 .on_click(jump_handler)
2350 .tooltip(|cx| {
2351 Tooltip::for_action(
2352 "Jump to Buffer",
2353 &OpenExcerpts,
2354 cx,
2355 )
2356 })
2357 .child(
2358 div()
2359 .h_px()
2360 .w_full()
2361 .bg(cx.theme().colors().border_variant)
2362 .group_hover("", |style| {
2363 style.bg(cx.theme().colors().border)
2364 }),
2365 ),
2366 )
2367 } else {
2368 this.child(div().size_full().bg(gpui::green()))
2369 }
2370 })
2371 // .child("⋯")
2372 // .children(jump_icon) // .p_x(gutter_padding)
2373 };
2374 element.into_any()
2375 }
2376 };
2377
2378 let size = element.measure(available_space, cx);
2379 (element, size)
2380 };
2381
2382 let mut fixed_block_max_width = Pixels::ZERO;
2383 let mut blocks = Vec::new();
2384 for (row, block) in fixed_blocks {
2385 let available_space = size(
2386 AvailableSpace::MinContent,
2387 AvailableSpace::Definite(block.height() as f32 * line_height),
2388 );
2389 let (element, element_size) =
2390 render_block(block, available_space, block_id, editor, cx);
2391 block_id += 1;
2392 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2393 blocks.push(BlockLayout {
2394 row,
2395 element,
2396 available_space,
2397 style: BlockStyle::Fixed,
2398 });
2399 }
2400 for (row, block) in non_fixed_blocks {
2401 let style = match block {
2402 TransformBlock::Custom(block) => block.style(),
2403 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2404 };
2405 let width = match style {
2406 BlockStyle::Sticky => editor_width,
2407 BlockStyle::Flex => editor_width
2408 .max(fixed_block_max_width)
2409 .max(gutter_width + scroll_width),
2410 BlockStyle::Fixed => unreachable!(),
2411 };
2412 let available_space = size(
2413 AvailableSpace::Definite(width),
2414 AvailableSpace::Definite(block.height() as f32 * line_height),
2415 );
2416 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2417 block_id += 1;
2418 blocks.push(BlockLayout {
2419 row,
2420 element,
2421 available_space,
2422 style,
2423 });
2424 }
2425 (
2426 scroll_width.max(fixed_block_max_width - gutter_width),
2427 blocks,
2428 )
2429 }
2430
2431 fn paint_mouse_listeners(
2432 &mut self,
2433 bounds: Bounds<Pixels>,
2434 gutter_bounds: Bounds<Pixels>,
2435 text_bounds: Bounds<Pixels>,
2436 layout: &LayoutState,
2437 cx: &mut WindowContext,
2438 ) {
2439 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2440 let interactive_bounds = InteractiveBounds {
2441 bounds: bounds.intersect(&cx.content_mask().bounds),
2442 stacking_order: cx.stacking_order().clone(),
2443 };
2444
2445 cx.on_mouse_event({
2446 let position_map = layout.position_map.clone();
2447 let editor = self.editor.clone();
2448 let interactive_bounds = interactive_bounds.clone();
2449
2450 move |event: &ScrollWheelEvent, phase, cx| {
2451 if phase != DispatchPhase::Bubble {
2452 return;
2453 }
2454
2455 editor.update(cx, |editor, cx| {
2456 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2457 });
2458 }
2459 });
2460
2461 cx.on_mouse_event({
2462 let position_map = layout.position_map.clone();
2463 let editor = self.editor.clone();
2464 let stacking_order = cx.stacking_order().clone();
2465
2466 move |event: &MouseDownEvent, phase, cx| {
2467 if phase != DispatchPhase::Bubble {
2468 return;
2469 }
2470
2471 match event.button {
2472 MouseButton::Left => editor.update(cx, |editor, cx| {
2473 Self::mouse_left_down(
2474 editor,
2475 event,
2476 &position_map,
2477 text_bounds,
2478 gutter_bounds,
2479 &stacking_order,
2480 cx,
2481 );
2482 }),
2483 MouseButton::Right => editor.update(cx, |editor, cx| {
2484 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2485 }),
2486 _ => {}
2487 };
2488 }
2489 });
2490
2491 cx.on_mouse_event({
2492 let position_map = layout.position_map.clone();
2493 let editor = self.editor.clone();
2494 let stacking_order = cx.stacking_order().clone();
2495
2496 move |event: &MouseUpEvent, phase, cx| {
2497 editor.update(cx, |editor, cx| {
2498 Self::mouse_up(
2499 editor,
2500 event,
2501 &position_map,
2502 text_bounds,
2503 &stacking_order,
2504 cx,
2505 )
2506 });
2507 }
2508 });
2509 cx.on_mouse_event({
2510 let position_map = layout.position_map.clone();
2511 let editor = self.editor.clone();
2512 let stacking_order = cx.stacking_order().clone();
2513
2514 move |event: &MouseMoveEvent, phase, cx| {
2515 if phase != DispatchPhase::Bubble {
2516 return;
2517 }
2518
2519 editor.update(cx, |editor, cx| {
2520 Self::mouse_moved(
2521 editor,
2522 event,
2523 &position_map,
2524 text_bounds,
2525 gutter_bounds,
2526 &stacking_order,
2527 cx,
2528 )
2529 });
2530 }
2531 });
2532 }
2533}
2534
2535#[derive(Debug)]
2536pub struct LineWithInvisibles {
2537 pub line: ShapedLine,
2538 invisibles: Vec<Invisible>,
2539}
2540
2541impl LineWithInvisibles {
2542 fn from_chunks<'a>(
2543 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2544 text_style: &TextStyle,
2545 max_line_len: usize,
2546 max_line_count: usize,
2547 line_number_layouts: &[Option<ShapedLine>],
2548 editor_mode: EditorMode,
2549 cx: &WindowContext,
2550 ) -> Vec<Self> {
2551 let mut layouts = Vec::with_capacity(max_line_count);
2552 let mut line = String::new();
2553 let mut invisibles = Vec::new();
2554 let mut styles = Vec::new();
2555 let mut non_whitespace_added = false;
2556 let mut row = 0;
2557 let mut line_exceeded_max_len = false;
2558 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2559
2560 for highlighted_chunk in chunks.chain([HighlightedChunk {
2561 chunk: "\n",
2562 style: None,
2563 is_tab: false,
2564 }]) {
2565 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2566 if ix > 0 {
2567 let shaped_line = cx
2568 .text_system()
2569 .shape_line(line.clone().into(), font_size, &styles)
2570 .unwrap();
2571 layouts.push(Self {
2572 line: shaped_line,
2573 invisibles: invisibles.drain(..).collect(),
2574 });
2575
2576 line.clear();
2577 styles.clear();
2578 row += 1;
2579 line_exceeded_max_len = false;
2580 non_whitespace_added = false;
2581 if row == max_line_count {
2582 return layouts;
2583 }
2584 }
2585
2586 if !line_chunk.is_empty() && !line_exceeded_max_len {
2587 let text_style = if let Some(style) = highlighted_chunk.style {
2588 Cow::Owned(text_style.clone().highlight(style))
2589 } else {
2590 Cow::Borrowed(text_style)
2591 };
2592
2593 if line.len() + line_chunk.len() > max_line_len {
2594 let mut chunk_len = max_line_len - line.len();
2595 while !line_chunk.is_char_boundary(chunk_len) {
2596 chunk_len -= 1;
2597 }
2598 line_chunk = &line_chunk[..chunk_len];
2599 line_exceeded_max_len = true;
2600 }
2601
2602 styles.push(TextRun {
2603 len: line_chunk.len(),
2604 font: text_style.font(),
2605 color: text_style.color,
2606 background_color: text_style.background_color,
2607 underline: text_style.underline,
2608 });
2609
2610 if editor_mode == EditorMode::Full {
2611 // Line wrap pads its contents with fake whitespaces,
2612 // avoid printing them
2613 let inside_wrapped_string = line_number_layouts
2614 .get(row)
2615 .and_then(|layout| layout.as_ref())
2616 .is_none();
2617 if highlighted_chunk.is_tab {
2618 if non_whitespace_added || !inside_wrapped_string {
2619 invisibles.push(Invisible::Tab {
2620 line_start_offset: line.len(),
2621 });
2622 }
2623 } else {
2624 invisibles.extend(
2625 line_chunk
2626 .chars()
2627 .enumerate()
2628 .filter(|(_, line_char)| {
2629 let is_whitespace = line_char.is_whitespace();
2630 non_whitespace_added |= !is_whitespace;
2631 is_whitespace
2632 && (non_whitespace_added || !inside_wrapped_string)
2633 })
2634 .map(|(whitespace_index, _)| Invisible::Whitespace {
2635 line_offset: line.len() + whitespace_index,
2636 }),
2637 )
2638 }
2639 }
2640
2641 line.push_str(line_chunk);
2642 }
2643 }
2644 }
2645
2646 layouts
2647 }
2648
2649 fn draw(
2650 &self,
2651 layout: &LayoutState,
2652 row: u32,
2653 content_origin: gpui::Point<Pixels>,
2654 whitespace_setting: ShowWhitespaceSetting,
2655 selection_ranges: &[Range<DisplayPoint>],
2656 cx: &mut WindowContext,
2657 ) {
2658 let line_height = layout.position_map.line_height;
2659 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2660
2661 self.line.paint(
2662 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2663 line_height,
2664 cx,
2665 );
2666
2667 self.draw_invisibles(
2668 &selection_ranges,
2669 layout,
2670 content_origin,
2671 line_y,
2672 row,
2673 line_height,
2674 whitespace_setting,
2675 cx,
2676 );
2677 }
2678
2679 fn draw_invisibles(
2680 &self,
2681 selection_ranges: &[Range<DisplayPoint>],
2682 layout: &LayoutState,
2683 content_origin: gpui::Point<Pixels>,
2684 line_y: Pixels,
2685 row: u32,
2686 line_height: Pixels,
2687 whitespace_setting: ShowWhitespaceSetting,
2688 cx: &mut WindowContext,
2689 ) {
2690 let allowed_invisibles_regions = match whitespace_setting {
2691 ShowWhitespaceSetting::None => return,
2692 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2693 ShowWhitespaceSetting::All => None,
2694 };
2695
2696 for invisible in &self.invisibles {
2697 let (&token_offset, invisible_symbol) = match invisible {
2698 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2699 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2700 };
2701
2702 let x_offset = self.line.x_for_index(token_offset);
2703 let invisible_offset =
2704 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2705 let origin = content_origin
2706 + gpui::point(
2707 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2708 line_y,
2709 );
2710
2711 if let Some(allowed_regions) = allowed_invisibles_regions {
2712 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2713 if !allowed_regions
2714 .iter()
2715 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2716 {
2717 continue;
2718 }
2719 }
2720 invisible_symbol.paint(origin, line_height, cx);
2721 }
2722 }
2723}
2724
2725#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2726enum Invisible {
2727 Tab { line_start_offset: usize },
2728 Whitespace { line_offset: usize },
2729}
2730
2731impl Element for EditorElement {
2732 type State = ();
2733
2734 fn layout(
2735 &mut self,
2736 element_state: Option<Self::State>,
2737 cx: &mut gpui::WindowContext,
2738 ) -> (gpui::LayoutId, Self::State) {
2739 self.editor.update(cx, |editor, cx| {
2740 editor.set_style(self.style.clone(), cx);
2741
2742 let layout_id = match editor.mode {
2743 EditorMode::SingleLine => {
2744 let rem_size = cx.rem_size();
2745 let mut style = Style::default();
2746 style.size.width = relative(1.).into();
2747 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2748 cx.request_layout(&style, None)
2749 }
2750 EditorMode::AutoHeight { max_lines } => {
2751 let editor_handle = cx.view().clone();
2752 let max_line_number_width =
2753 self.max_line_number_width(&editor.snapshot(cx), cx);
2754 cx.request_measured_layout(
2755 Style::default(),
2756 move |known_dimensions, available_space, cx| {
2757 editor_handle
2758 .update(cx, |editor, cx| {
2759 compute_auto_height_layout(
2760 editor,
2761 max_lines,
2762 max_line_number_width,
2763 known_dimensions,
2764 cx,
2765 )
2766 })
2767 .unwrap_or_default()
2768 },
2769 )
2770 }
2771 EditorMode::Full => {
2772 let mut style = Style::default();
2773 style.size.width = relative(1.).into();
2774 style.size.height = relative(1.).into();
2775 cx.request_layout(&style, None)
2776 }
2777 };
2778
2779 (layout_id, ())
2780 })
2781 }
2782
2783 fn paint(
2784 mut self,
2785 bounds: Bounds<gpui::Pixels>,
2786 element_state: &mut Self::State,
2787 cx: &mut gpui::WindowContext,
2788 ) {
2789 let editor = self.editor.clone();
2790
2791 let mut layout = self.compute_layout(bounds, cx);
2792 let gutter_bounds = Bounds {
2793 origin: bounds.origin,
2794 size: layout.gutter_size,
2795 };
2796 let text_bounds = Bounds {
2797 origin: gutter_bounds.upper_right(),
2798 size: layout.text_size,
2799 };
2800
2801 let focus_handle = editor.focus_handle(cx);
2802 let key_context = self.editor.read(cx).key_context(cx);
2803 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2804 self.register_actions(cx);
2805 self.register_key_listeners(cx);
2806
2807 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2808 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2809 cx.handle_input(&focus_handle, input_handler);
2810
2811 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2812 if layout.gutter_size.width > Pixels::ZERO {
2813 self.paint_gutter(gutter_bounds, &mut layout, cx);
2814 }
2815 self.paint_text(text_bounds, &mut layout, cx);
2816
2817 cx.with_z_index(0, |cx| {
2818 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2819
2820 if !layout.blocks.is_empty() {
2821 cx.with_element_id(Some("editor_blocks"), |cx| {
2822 self.paint_blocks(bounds, &mut layout, cx);
2823 });
2824 }
2825 });
2826
2827 cx.with_z_index(1, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2828
2829 cx.with_z_index(2, |cx| {
2830 self.paint_overlays(text_bounds, &mut layout, cx);
2831 });
2832 });
2833 })
2834 }
2835}
2836
2837impl IntoElement for EditorElement {
2838 type Element = Self;
2839
2840 fn element_id(&self) -> Option<gpui::ElementId> {
2841 self.editor.element_id()
2842 }
2843
2844 fn into_element(self) -> Self::Element {
2845 self
2846 }
2847}
2848
2849type BufferRow = u32;
2850
2851pub struct LayoutState {
2852 position_map: Arc<PositionMap>,
2853 gutter_size: Size<Pixels>,
2854 gutter_padding: Pixels,
2855 gutter_margin: Pixels,
2856 text_size: gpui::Size<Pixels>,
2857 mode: EditorMode,
2858 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2859 visible_anchor_range: Range<Anchor>,
2860 visible_display_row_range: Range<u32>,
2861 active_rows: BTreeMap<u32, bool>,
2862 highlighted_rows: Option<Range<u32>>,
2863 line_numbers: Vec<Option<ShapedLine>>,
2864 display_hunks: Vec<DisplayDiffHunk>,
2865 blocks: Vec<BlockLayout>,
2866 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2867 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2868 scrollbar_row_range: Range<f32>,
2869 show_scrollbars: bool,
2870 is_singleton: bool,
2871 max_row: u32,
2872 context_menu: Option<(DisplayPoint, AnyElement)>,
2873 code_actions_indicator: Option<CodeActionsIndicator>,
2874 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2875 fold_indicators: Vec<Option<IconButton>>,
2876 tab_invisible: ShapedLine,
2877 space_invisible: ShapedLine,
2878}
2879
2880struct CodeActionsIndicator {
2881 row: u32,
2882 button: IconButton,
2883}
2884
2885struct PositionMap {
2886 size: Size<Pixels>,
2887 line_height: Pixels,
2888 scroll_position: gpui::Point<Pixels>,
2889 scroll_max: gpui::Point<f32>,
2890 em_width: Pixels,
2891 em_advance: Pixels,
2892 line_layouts: Vec<LineWithInvisibles>,
2893 snapshot: EditorSnapshot,
2894}
2895
2896#[derive(Debug, Copy, Clone)]
2897pub struct PointForPosition {
2898 pub previous_valid: DisplayPoint,
2899 pub next_valid: DisplayPoint,
2900 pub exact_unclipped: DisplayPoint,
2901 pub column_overshoot_after_line_end: u32,
2902}
2903
2904impl PointForPosition {
2905 #[cfg(test)]
2906 pub fn valid(valid: DisplayPoint) -> Self {
2907 Self {
2908 previous_valid: valid,
2909 next_valid: valid,
2910 exact_unclipped: valid,
2911 column_overshoot_after_line_end: 0,
2912 }
2913 }
2914
2915 pub fn as_valid(&self) -> Option<DisplayPoint> {
2916 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2917 Some(self.previous_valid)
2918 } else {
2919 None
2920 }
2921 }
2922}
2923
2924impl PositionMap {
2925 fn point_for_position(
2926 &self,
2927 text_bounds: Bounds<Pixels>,
2928 position: gpui::Point<Pixels>,
2929 ) -> PointForPosition {
2930 let scroll_position = self.snapshot.scroll_position();
2931 let position = position - text_bounds.origin;
2932 let y = position.y.max(px(0.)).min(self.size.height);
2933 let x = position.x + (scroll_position.x * self.em_width);
2934 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2935
2936 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2937 .line_layouts
2938 .get(row as usize - scroll_position.y as usize)
2939 .map(|&LineWithInvisibles { ref line, .. }| line)
2940 {
2941 if let Some(ix) = line.index_for_x(x) {
2942 (ix as u32, px(0.))
2943 } else {
2944 (line.len as u32, px(0.).max(x - line.width))
2945 }
2946 } else {
2947 (0, x)
2948 };
2949
2950 let mut exact_unclipped = DisplayPoint::new(row, column);
2951 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2952 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2953
2954 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2955 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2956 PointForPosition {
2957 previous_valid,
2958 next_valid,
2959 exact_unclipped,
2960 column_overshoot_after_line_end,
2961 }
2962 }
2963}
2964
2965struct BlockLayout {
2966 row: u32,
2967 element: AnyElement,
2968 available_space: Size<AvailableSpace>,
2969 style: BlockStyle,
2970}
2971
2972fn layout_line(
2973 row: u32,
2974 snapshot: &EditorSnapshot,
2975 style: &EditorStyle,
2976 cx: &WindowContext,
2977) -> Result<ShapedLine> {
2978 let mut line = snapshot.line(row);
2979
2980 if line.len() > MAX_LINE_LEN {
2981 let mut len = MAX_LINE_LEN;
2982 while !line.is_char_boundary(len) {
2983 len -= 1;
2984 }
2985
2986 line.truncate(len);
2987 }
2988
2989 cx.text_system().shape_line(
2990 line.into(),
2991 style.text.font_size.to_pixels(cx.rem_size()),
2992 &[TextRun {
2993 len: snapshot.line_len(row) as usize,
2994 font: style.text.font(),
2995 color: Hsla::default(),
2996 background_color: None,
2997 underline: None,
2998 }],
2999 )
3000}
3001
3002#[derive(Debug)]
3003pub struct Cursor {
3004 origin: gpui::Point<Pixels>,
3005 block_width: Pixels,
3006 line_height: Pixels,
3007 color: Hsla,
3008 shape: CursorShape,
3009 block_text: Option<ShapedLine>,
3010}
3011
3012impl Cursor {
3013 pub fn new(
3014 origin: gpui::Point<Pixels>,
3015 block_width: Pixels,
3016 line_height: Pixels,
3017 color: Hsla,
3018 shape: CursorShape,
3019 block_text: Option<ShapedLine>,
3020 ) -> Cursor {
3021 Cursor {
3022 origin,
3023 block_width,
3024 line_height,
3025 color,
3026 shape,
3027 block_text,
3028 }
3029 }
3030
3031 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3032 Bounds {
3033 origin: self.origin + origin,
3034 size: size(self.block_width, self.line_height),
3035 }
3036 }
3037
3038 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3039 let bounds = match self.shape {
3040 CursorShape::Bar => Bounds {
3041 origin: self.origin + origin,
3042 size: size(px(2.0), self.line_height),
3043 },
3044 CursorShape::Block | CursorShape::Hollow => Bounds {
3045 origin: self.origin + origin,
3046 size: size(self.block_width, self.line_height),
3047 },
3048 CursorShape::Underscore => Bounds {
3049 origin: self.origin
3050 + origin
3051 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3052 size: size(self.block_width, px(2.0)),
3053 },
3054 };
3055
3056 //Draw background or border quad
3057 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3058 outline(bounds, self.color)
3059 } else {
3060 fill(bounds, self.color)
3061 };
3062
3063 cx.paint_quad(cursor);
3064
3065 if let Some(block_text) = &self.block_text {
3066 block_text.paint(self.origin + origin, self.line_height, cx);
3067 }
3068 }
3069
3070 pub fn shape(&self) -> CursorShape {
3071 self.shape
3072 }
3073}
3074
3075#[derive(Debug)]
3076pub struct HighlightedRange {
3077 pub start_y: Pixels,
3078 pub line_height: Pixels,
3079 pub lines: Vec<HighlightedRangeLine>,
3080 pub color: Hsla,
3081 pub corner_radius: Pixels,
3082}
3083
3084#[derive(Debug)]
3085pub struct HighlightedRangeLine {
3086 pub start_x: Pixels,
3087 pub end_x: Pixels,
3088}
3089
3090impl HighlightedRange {
3091 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3092 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3093 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3094 self.paint_lines(
3095 self.start_y + self.line_height,
3096 &self.lines[1..],
3097 bounds,
3098 cx,
3099 );
3100 } else {
3101 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3102 }
3103 }
3104
3105 fn paint_lines(
3106 &self,
3107 start_y: Pixels,
3108 lines: &[HighlightedRangeLine],
3109 bounds: Bounds<Pixels>,
3110 cx: &mut WindowContext,
3111 ) {
3112 if lines.is_empty() {
3113 return;
3114 }
3115
3116 let first_line = lines.first().unwrap();
3117 let last_line = lines.last().unwrap();
3118
3119 let first_top_left = point(first_line.start_x, start_y);
3120 let first_top_right = point(first_line.end_x, start_y);
3121
3122 let curve_height = point(Pixels::ZERO, self.corner_radius);
3123 let curve_width = |start_x: Pixels, end_x: Pixels| {
3124 let max = (end_x - start_x) / 2.;
3125 let width = if max < self.corner_radius {
3126 max
3127 } else {
3128 self.corner_radius
3129 };
3130
3131 point(width, Pixels::ZERO)
3132 };
3133
3134 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3135 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3136 path.curve_to(first_top_right + curve_height, first_top_right);
3137
3138 let mut iter = lines.iter().enumerate().peekable();
3139 while let Some((ix, line)) = iter.next() {
3140 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3141
3142 if let Some((_, next_line)) = iter.peek() {
3143 let next_top_right = point(next_line.end_x, bottom_right.y);
3144
3145 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3146 Ordering::Equal => {
3147 path.line_to(bottom_right);
3148 }
3149 Ordering::Less => {
3150 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3151 path.line_to(bottom_right - curve_height);
3152 if self.corner_radius > Pixels::ZERO {
3153 path.curve_to(bottom_right - curve_width, bottom_right);
3154 }
3155 path.line_to(next_top_right + curve_width);
3156 if self.corner_radius > Pixels::ZERO {
3157 path.curve_to(next_top_right + curve_height, next_top_right);
3158 }
3159 }
3160 Ordering::Greater => {
3161 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3162 path.line_to(bottom_right - curve_height);
3163 if self.corner_radius > Pixels::ZERO {
3164 path.curve_to(bottom_right + curve_width, bottom_right);
3165 }
3166 path.line_to(next_top_right - curve_width);
3167 if self.corner_radius > Pixels::ZERO {
3168 path.curve_to(next_top_right + curve_height, next_top_right);
3169 }
3170 }
3171 }
3172 } else {
3173 let curve_width = curve_width(line.start_x, line.end_x);
3174 path.line_to(bottom_right - curve_height);
3175 if self.corner_radius > Pixels::ZERO {
3176 path.curve_to(bottom_right - curve_width, bottom_right);
3177 }
3178
3179 let bottom_left = point(line.start_x, bottom_right.y);
3180 path.line_to(bottom_left + curve_width);
3181 if self.corner_radius > Pixels::ZERO {
3182 path.curve_to(bottom_left - curve_height, bottom_left);
3183 }
3184 }
3185 }
3186
3187 if first_line.start_x > last_line.start_x {
3188 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3189 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3190 path.line_to(second_top_left + curve_height);
3191 if self.corner_radius > Pixels::ZERO {
3192 path.curve_to(second_top_left + curve_width, second_top_left);
3193 }
3194 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3195 path.line_to(first_bottom_left - curve_width);
3196 if self.corner_radius > Pixels::ZERO {
3197 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3198 }
3199 }
3200
3201 path.line_to(first_top_left + curve_height);
3202 if self.corner_radius > Pixels::ZERO {
3203 path.curve_to(first_top_left + top_curve_width, first_top_left);
3204 }
3205 path.line_to(first_top_right - top_curve_width);
3206
3207 cx.paint_path(path, self.color);
3208 }
3209}
3210
3211pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3212 (delta.pow(1.5) / 100.0).into()
3213}
3214
3215fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3216 (delta.pow(1.2) / 300.0).into()
3217}
3218
3219#[cfg(test)]
3220mod tests {
3221 use super::*;
3222 use crate::{
3223 display_map::{BlockDisposition, BlockProperties},
3224 editor_tests::{init_test, update_test_language_settings},
3225 Editor, MultiBuffer,
3226 };
3227 use gpui::{EmptyView, TestAppContext};
3228 use language::language_settings;
3229 use log::info;
3230 use std::{num::NonZeroU32, sync::Arc};
3231 use util::test::sample_text;
3232
3233 #[gpui::test]
3234 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3235 init_test(cx, |_| {});
3236 let window = cx.add_window(|cx| {
3237 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3238 Editor::new(EditorMode::Full, buffer, None, cx)
3239 });
3240
3241 let editor = window.root(cx).unwrap();
3242 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3243 let element = EditorElement::new(&editor, style);
3244
3245 let layouts = window
3246 .update(cx, |editor, cx| {
3247 let snapshot = editor.snapshot(cx);
3248 element
3249 .shape_line_numbers(
3250 0..6,
3251 &Default::default(),
3252 DisplayPoint::new(0, 0),
3253 false,
3254 &snapshot,
3255 cx,
3256 )
3257 .0
3258 })
3259 .unwrap();
3260 assert_eq!(layouts.len(), 6);
3261
3262 let relative_rows = window
3263 .update(cx, |editor, cx| {
3264 let snapshot = editor.snapshot(cx);
3265 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3266 })
3267 .unwrap();
3268 assert_eq!(relative_rows[&0], 3);
3269 assert_eq!(relative_rows[&1], 2);
3270 assert_eq!(relative_rows[&2], 1);
3271 // current line has no relative number
3272 assert_eq!(relative_rows[&4], 1);
3273 assert_eq!(relative_rows[&5], 2);
3274
3275 // works if cursor is before screen
3276 let relative_rows = window
3277 .update(cx, |editor, cx| {
3278 let snapshot = editor.snapshot(cx);
3279
3280 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3281 })
3282 .unwrap();
3283 assert_eq!(relative_rows.len(), 3);
3284 assert_eq!(relative_rows[&3], 2);
3285 assert_eq!(relative_rows[&4], 3);
3286 assert_eq!(relative_rows[&5], 4);
3287
3288 // works if cursor is after screen
3289 let relative_rows = window
3290 .update(cx, |editor, cx| {
3291 let snapshot = editor.snapshot(cx);
3292
3293 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3294 })
3295 .unwrap();
3296 assert_eq!(relative_rows.len(), 3);
3297 assert_eq!(relative_rows[&0], 5);
3298 assert_eq!(relative_rows[&1], 4);
3299 assert_eq!(relative_rows[&2], 3);
3300 }
3301
3302 #[gpui::test]
3303 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3304 init_test(cx, |_| {});
3305
3306 let window = cx.add_window(|cx| {
3307 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3308 Editor::new(EditorMode::Full, buffer, None, cx)
3309 });
3310 let editor = window.root(cx).unwrap();
3311 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3312 let mut element = EditorElement::new(&editor, style);
3313
3314 window
3315 .update(cx, |editor, cx| {
3316 editor.cursor_shape = CursorShape::Block;
3317 editor.change_selections(None, cx, |s| {
3318 s.select_ranges([
3319 Point::new(0, 0)..Point::new(1, 0),
3320 Point::new(3, 2)..Point::new(3, 3),
3321 Point::new(5, 6)..Point::new(6, 0),
3322 ]);
3323 });
3324 })
3325 .unwrap();
3326 let state = cx
3327 .update_window(window.into(), |_, cx| {
3328 element.compute_layout(
3329 Bounds {
3330 origin: point(px(500.), px(500.)),
3331 size: size(px(500.), px(500.)),
3332 },
3333 cx,
3334 )
3335 })
3336 .unwrap();
3337
3338 assert_eq!(state.selections.len(), 1);
3339 let local_selections = &state.selections[0].1;
3340 assert_eq!(local_selections.len(), 3);
3341 // moves cursor back one line
3342 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3343 assert_eq!(
3344 local_selections[0].range,
3345 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3346 );
3347
3348 // moves cursor back one column
3349 assert_eq!(
3350 local_selections[1].range,
3351 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3352 );
3353 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3354
3355 // leaves cursor on the max point
3356 assert_eq!(
3357 local_selections[2].range,
3358 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3359 );
3360 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3361
3362 // active lines does not include 1 (even though the range of the selection does)
3363 assert_eq!(
3364 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3365 vec![0, 3, 5, 6]
3366 );
3367
3368 // multi-buffer support
3369 // in DisplayPoint co-ordinates, this is what we're dealing with:
3370 // 0: [[file
3371 // 1: header]]
3372 // 2: aaaaaa
3373 // 3: bbbbbb
3374 // 4: cccccc
3375 // 5:
3376 // 6: ...
3377 // 7: ffffff
3378 // 8: gggggg
3379 // 9: hhhhhh
3380 // 10:
3381 // 11: [[file
3382 // 12: header]]
3383 // 13: bbbbbb
3384 // 14: cccccc
3385 // 15: dddddd
3386 let window = cx.add_window(|cx| {
3387 let buffer = MultiBuffer::build_multi(
3388 [
3389 (
3390 &(sample_text(8, 6, 'a') + "\n"),
3391 vec![
3392 Point::new(0, 0)..Point::new(3, 0),
3393 Point::new(4, 0)..Point::new(7, 0),
3394 ],
3395 ),
3396 (
3397 &(sample_text(8, 6, 'a') + "\n"),
3398 vec![Point::new(1, 0)..Point::new(3, 0)],
3399 ),
3400 ],
3401 cx,
3402 );
3403 Editor::new(EditorMode::Full, buffer, None, cx)
3404 });
3405 let editor = window.root(cx).unwrap();
3406 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3407 let mut element = EditorElement::new(&editor, style);
3408 let state = window.update(cx, |editor, cx| {
3409 editor.cursor_shape = CursorShape::Block;
3410 editor.change_selections(None, cx, |s| {
3411 s.select_display_ranges([
3412 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3413 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3414 ]);
3415 });
3416 });
3417
3418 let state = cx
3419 .update_window(window.into(), |_, cx| {
3420 element.compute_layout(
3421 Bounds {
3422 origin: point(px(500.), px(500.)),
3423 size: size(px(500.), px(500.)),
3424 },
3425 cx,
3426 )
3427 })
3428 .unwrap();
3429 assert_eq!(state.selections.len(), 1);
3430 let local_selections = &state.selections[0].1;
3431 assert_eq!(local_selections.len(), 2);
3432
3433 // moves cursor on excerpt boundary back a line
3434 // and doesn't allow selection to bleed through
3435 assert_eq!(
3436 local_selections[0].range,
3437 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3438 );
3439 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3440 // moves cursor on buffer boundary back two lines
3441 // and doesn't allow selection to bleed through
3442 assert_eq!(
3443 local_selections[1].range,
3444 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3445 );
3446 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3447 }
3448
3449 #[gpui::test]
3450 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3451 init_test(cx, |_| {});
3452
3453 let window = cx.add_window(|cx| {
3454 let buffer = MultiBuffer::build_simple("", cx);
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 window
3460 .update(cx, |editor, cx| {
3461 editor.set_placeholder_text("hello", cx);
3462 editor.insert_blocks(
3463 [BlockProperties {
3464 style: BlockStyle::Fixed,
3465 disposition: BlockDisposition::Above,
3466 height: 3,
3467 position: Anchor::min(),
3468 render: Arc::new(|_| div().into_any()),
3469 }],
3470 None,
3471 cx,
3472 );
3473
3474 // Blur the editor so that it displays placeholder text.
3475 cx.blur();
3476 })
3477 .unwrap();
3478
3479 let mut element = EditorElement::new(&editor, style);
3480 let mut state = cx
3481 .update_window(window.into(), |_, cx| {
3482 element.compute_layout(
3483 Bounds {
3484 origin: point(px(500.), px(500.)),
3485 size: size(px(500.), px(500.)),
3486 },
3487 cx,
3488 )
3489 })
3490 .unwrap();
3491 let size = state.position_map.size;
3492
3493 assert_eq!(state.position_map.line_layouts.len(), 4);
3494 assert_eq!(
3495 state
3496 .line_numbers
3497 .iter()
3498 .map(Option::is_some)
3499 .collect::<Vec<_>>(),
3500 &[false, false, false, true]
3501 );
3502
3503 // Don't panic.
3504 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3505 cx.update_window(window.into(), |_, cx| {
3506 element.paint(bounds, &mut (), cx);
3507 })
3508 .unwrap()
3509 }
3510
3511 #[gpui::test]
3512 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3513 const TAB_SIZE: u32 = 4;
3514
3515 let input_text = "\t \t|\t| a b";
3516 let expected_invisibles = vec![
3517 Invisible::Tab {
3518 line_start_offset: 0,
3519 },
3520 Invisible::Whitespace {
3521 line_offset: TAB_SIZE as usize,
3522 },
3523 Invisible::Tab {
3524 line_start_offset: TAB_SIZE as usize + 1,
3525 },
3526 Invisible::Tab {
3527 line_start_offset: TAB_SIZE as usize * 2 + 1,
3528 },
3529 Invisible::Whitespace {
3530 line_offset: TAB_SIZE as usize * 3 + 1,
3531 },
3532 Invisible::Whitespace {
3533 line_offset: TAB_SIZE as usize * 3 + 3,
3534 },
3535 ];
3536 assert_eq!(
3537 expected_invisibles.len(),
3538 input_text
3539 .chars()
3540 .filter(|initial_char| initial_char.is_whitespace())
3541 .count(),
3542 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3543 );
3544
3545 init_test(cx, |s| {
3546 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3547 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3548 });
3549
3550 let actual_invisibles =
3551 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3552
3553 assert_eq!(expected_invisibles, actual_invisibles);
3554 }
3555
3556 #[gpui::test]
3557 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3558 init_test(cx, |s| {
3559 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3560 s.defaults.tab_size = NonZeroU32::new(4);
3561 });
3562
3563 for editor_mode_without_invisibles in [
3564 EditorMode::SingleLine,
3565 EditorMode::AutoHeight { max_lines: 100 },
3566 ] {
3567 let invisibles = collect_invisibles_from_new_editor(
3568 cx,
3569 editor_mode_without_invisibles,
3570 "\t\t\t| | a b",
3571 px(500.0),
3572 );
3573 assert!(invisibles.is_empty(),
3574 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3575 }
3576 }
3577
3578 #[gpui::test]
3579 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3580 let tab_size = 4;
3581 let input_text = "a\tbcd ".repeat(9);
3582 let repeated_invisibles = [
3583 Invisible::Tab {
3584 line_start_offset: 1,
3585 },
3586 Invisible::Whitespace {
3587 line_offset: tab_size as usize + 3,
3588 },
3589 Invisible::Whitespace {
3590 line_offset: tab_size as usize + 4,
3591 },
3592 Invisible::Whitespace {
3593 line_offset: tab_size as usize + 5,
3594 },
3595 ];
3596 let expected_invisibles = std::iter::once(repeated_invisibles)
3597 .cycle()
3598 .take(9)
3599 .flatten()
3600 .collect::<Vec<_>>();
3601 assert_eq!(
3602 expected_invisibles.len(),
3603 input_text
3604 .chars()
3605 .filter(|initial_char| initial_char.is_whitespace())
3606 .count(),
3607 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3608 );
3609 info!("Expected invisibles: {expected_invisibles:?}");
3610
3611 init_test(cx, |_| {});
3612
3613 // Put the same string with repeating whitespace pattern into editors of various size,
3614 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3615 let resize_step = 10.0;
3616 let mut editor_width = 200.0;
3617 while editor_width <= 1000.0 {
3618 update_test_language_settings(cx, |s| {
3619 s.defaults.tab_size = NonZeroU32::new(tab_size);
3620 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3621 s.defaults.preferred_line_length = Some(editor_width as u32);
3622 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3623 });
3624
3625 let actual_invisibles = collect_invisibles_from_new_editor(
3626 cx,
3627 EditorMode::Full,
3628 &input_text,
3629 px(editor_width),
3630 );
3631
3632 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3633 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3634 let mut i = 0;
3635 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3636 i = actual_index;
3637 match expected_invisibles.get(i) {
3638 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3639 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3640 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3641 _ => {
3642 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3643 }
3644 },
3645 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3646 }
3647 }
3648 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3649 assert!(
3650 missing_expected_invisibles.is_empty(),
3651 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3652 );
3653
3654 editor_width += resize_step;
3655 }
3656 }
3657
3658 fn collect_invisibles_from_new_editor(
3659 cx: &mut TestAppContext,
3660 editor_mode: EditorMode,
3661 input_text: &str,
3662 editor_width: Pixels,
3663 ) -> Vec<Invisible> {
3664 info!(
3665 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3666 editor_width.0
3667 );
3668 let window = cx.add_window(|cx| {
3669 let buffer = MultiBuffer::build_simple(&input_text, cx);
3670 Editor::new(editor_mode, buffer, None, cx)
3671 });
3672 let editor = window.root(cx).unwrap();
3673 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3674 let mut element = EditorElement::new(&editor, style);
3675 window
3676 .update(cx, |editor, cx| {
3677 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3678 editor.set_wrap_width(Some(editor_width), cx);
3679 })
3680 .unwrap();
3681 let layout_state = cx
3682 .update_window(window.into(), |_, cx| {
3683 element.compute_layout(
3684 Bounds {
3685 origin: point(px(500.), px(500.)),
3686 size: size(px(500.), px(500.)),
3687 },
3688 cx,
3689 )
3690 })
3691 .unwrap();
3692
3693 layout_state
3694 .position_map
3695 .line_layouts
3696 .iter()
3697 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3698 .flatten()
3699 .cloned()
3700 .collect()
3701 }
3702}
3703
3704pub fn register_action<T: Action>(
3705 view: &View<Editor>,
3706 cx: &mut WindowContext,
3707 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3708) {
3709 let view = view.clone();
3710 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3711 let action = action.downcast_ref().unwrap();
3712 if phase == DispatchPhase::Bubble {
3713 view.update(cx, |editor, cx| {
3714 listener(editor, action, cx);
3715 })
3716 }
3717 })
3718}
3719
3720fn compute_auto_height_layout(
3721 editor: &mut Editor,
3722 max_lines: usize,
3723 max_line_number_width: Pixels,
3724 known_dimensions: Size<Option<Pixels>>,
3725 cx: &mut ViewContext<Editor>,
3726) -> Option<Size<Pixels>> {
3727 let mut width = known_dimensions.width?;
3728 if let Some(height) = known_dimensions.height {
3729 return Some(size(width, height));
3730 }
3731
3732 let style = editor.style.as_ref().unwrap();
3733 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3734 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3735 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3736 let em_width = cx
3737 .text_system()
3738 .typographic_bounds(font_id, font_size, 'm')
3739 .unwrap()
3740 .size
3741 .width;
3742
3743 let mut snapshot = editor.snapshot(cx);
3744 let gutter_padding;
3745 let gutter_width;
3746 let gutter_margin;
3747 if snapshot.show_gutter {
3748 let descent = cx.text_system().descent(font_id, font_size);
3749 let gutter_padding_factor = 3.5;
3750 gutter_padding = (em_width * gutter_padding_factor).round();
3751 gutter_width = max_line_number_width + gutter_padding * 2.0;
3752 gutter_margin = -descent;
3753 } else {
3754 gutter_padding = Pixels::ZERO;
3755 gutter_width = Pixels::ZERO;
3756 gutter_margin = Pixels::ZERO;
3757 };
3758
3759 editor.gutter_width = gutter_width;
3760 let text_width = width - gutter_width;
3761 let overscroll = size(em_width, px(0.));
3762
3763 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3764 if editor.set_wrap_width(Some(editor_width), cx) {
3765 snapshot = editor.snapshot(cx);
3766 }
3767
3768 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3769 let height = scroll_height
3770 .max(line_height)
3771 .min(line_height * max_lines as f32);
3772
3773 Some(size(width, height))
3774}