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, overlay, point, px, relative, size, transparent_black, Action, AnchorCorner, AnyElement,
27 AsyncWindowContext, AvailableSpace, BorrowWindow, Bounds, ContentMask, Corners, CursorStyle,
28 DispatchPhase, Edges, Element, ElementId, ElementInputHandler, Entity, EntityId, Hsla,
29 InteractiveBounds, InteractiveElement, IntoElement, LineLayout, ModifiersChangedEvent,
30 MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, RenderOnce,
31 ScrollWheelEvent, ShapedLine, SharedString, Size, StackingOrder, StatefulInteractiveElement,
32 Style, Styled, TextRun, TextStyle, View, ViewContext, WeakView, WindowContext, WrappedLine,
33};
34use itertools::Itertools;
35use language::{language_settings::ShowWhitespaceSetting, Language};
36use multi_buffer::Anchor;
37use project::{
38 project_settings::{GitGutterSetting, ProjectSettings},
39 ProjectPath,
40};
41use settings::Settings;
42use smallvec::SmallVec;
43use std::{
44 any::TypeId,
45 borrow::Cow,
46 cmp::{self, Ordering},
47 fmt::Write,
48 iter,
49 ops::Range,
50 sync::Arc,
51};
52use sum_tree::Bias;
53use theme::{ActiveTheme, PlayerColor};
54use ui::{
55 h_stack, ButtonLike, ButtonStyle, Disclosure, IconButton, IconElement, IconSize, Label, Tooltip,
56};
57use ui::{prelude::*, Icon};
58use util::ResultExt;
59use workspace::item::Item;
60
61enum FoldMarkers {}
62
63struct SelectionLayout {
64 head: DisplayPoint,
65 cursor_shape: CursorShape,
66 is_newest: bool,
67 is_local: bool,
68 range: Range<DisplayPoint>,
69 active_rows: Range<u32>,
70}
71
72impl SelectionLayout {
73 fn new<T: ToPoint + ToDisplayPoint + Clone>(
74 selection: Selection<T>,
75 line_mode: bool,
76 cursor_shape: CursorShape,
77 map: &DisplaySnapshot,
78 is_newest: bool,
79 is_local: bool,
80 ) -> Self {
81 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
82 let display_selection = point_selection.map(|p| p.to_display_point(map));
83 let mut range = display_selection.range();
84 let mut head = display_selection.head();
85 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
86 ..map.next_line_boundary(point_selection.end).1.row();
87
88 // vim visual line mode
89 if line_mode {
90 let point_range = map.expand_to_line(point_selection.range());
91 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
92 }
93
94 // any vim visual mode (including line mode)
95 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
96 if head.column() > 0 {
97 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
98 } else if head.row() > 0 && head != map.max_point() {
99 head = map.clip_point(
100 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
101 Bias::Left,
102 );
103 // updating range.end is a no-op unless you're cursor is
104 // on the newline containing a multi-buffer divider
105 // in which case the clip_point may have moved the head up
106 // an additional row.
107 range.end = DisplayPoint::new(head.row() + 1, 0);
108 active_rows.end = head.row();
109 }
110 }
111
112 Self {
113 head,
114 cursor_shape,
115 is_newest,
116 is_local,
117 range,
118 active_rows,
119 }
120 }
121}
122
123pub struct EditorElement {
124 editor: View<Editor>,
125 style: EditorStyle,
126}
127
128impl EditorElement {
129 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
130 Self {
131 editor: editor.clone(),
132 style,
133 }
134 }
135
136 fn register_actions(&self, cx: &mut WindowContext) {
137 let view = &self.editor;
138 view.update(cx, |editor, cx| {
139 for action in editor.editor_actions.iter() {
140 (action)(cx)
141 }
142 });
143
144 crate::rust_analyzer_ext::apply_related_actions(view, cx);
145 register_action(view, cx, Editor::move_left);
146 register_action(view, cx, Editor::move_right);
147 register_action(view, cx, Editor::move_down);
148 register_action(view, cx, Editor::move_up);
149 register_action(view, cx, Editor::cancel);
150 register_action(view, cx, Editor::newline);
151 register_action(view, cx, Editor::newline_above);
152 register_action(view, cx, Editor::newline_below);
153 register_action(view, cx, Editor::backspace);
154 register_action(view, cx, Editor::delete);
155 register_action(view, cx, Editor::tab);
156 register_action(view, cx, Editor::tab_prev);
157 register_action(view, cx, Editor::indent);
158 register_action(view, cx, Editor::outdent);
159 register_action(view, cx, Editor::delete_line);
160 register_action(view, cx, Editor::join_lines);
161 register_action(view, cx, Editor::sort_lines_case_sensitive);
162 register_action(view, cx, Editor::sort_lines_case_insensitive);
163 register_action(view, cx, Editor::reverse_lines);
164 register_action(view, cx, Editor::shuffle_lines);
165 register_action(view, cx, Editor::convert_to_upper_case);
166 register_action(view, cx, Editor::convert_to_lower_case);
167 register_action(view, cx, Editor::convert_to_title_case);
168 register_action(view, cx, Editor::convert_to_snake_case);
169 register_action(view, cx, Editor::convert_to_kebab_case);
170 register_action(view, cx, Editor::convert_to_upper_camel_case);
171 register_action(view, cx, Editor::convert_to_lower_camel_case);
172 register_action(view, cx, Editor::delete_to_previous_word_start);
173 register_action(view, cx, Editor::delete_to_previous_subword_start);
174 register_action(view, cx, Editor::delete_to_next_word_end);
175 register_action(view, cx, Editor::delete_to_next_subword_end);
176 register_action(view, cx, Editor::delete_to_beginning_of_line);
177 register_action(view, cx, Editor::delete_to_end_of_line);
178 register_action(view, cx, Editor::cut_to_end_of_line);
179 register_action(view, cx, Editor::duplicate_line);
180 register_action(view, cx, Editor::move_line_up);
181 register_action(view, cx, Editor::move_line_down);
182 register_action(view, cx, Editor::transpose);
183 register_action(view, cx, Editor::cut);
184 register_action(view, cx, Editor::copy);
185 register_action(view, cx, Editor::paste);
186 register_action(view, cx, Editor::undo);
187 register_action(view, cx, Editor::redo);
188 register_action(view, cx, Editor::move_page_up);
189 register_action(view, cx, Editor::move_page_down);
190 register_action(view, cx, Editor::next_screen);
191 register_action(view, cx, Editor::scroll_cursor_top);
192 register_action(view, cx, Editor::scroll_cursor_center);
193 register_action(view, cx, Editor::scroll_cursor_bottom);
194 register_action(view, cx, |editor, _: &LineDown, cx| {
195 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
196 });
197 register_action(view, cx, |editor, _: &LineUp, cx| {
198 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
199 });
200 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
201 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
202 });
203 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
204 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
205 });
206 register_action(view, cx, |editor, _: &PageDown, cx| {
207 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
208 });
209 register_action(view, cx, |editor, _: &PageUp, cx| {
210 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
211 });
212 register_action(view, cx, Editor::move_to_previous_word_start);
213 register_action(view, cx, Editor::move_to_previous_subword_start);
214 register_action(view, cx, Editor::move_to_next_word_end);
215 register_action(view, cx, Editor::move_to_next_subword_end);
216 register_action(view, cx, Editor::move_to_beginning_of_line);
217 register_action(view, cx, Editor::move_to_end_of_line);
218 register_action(view, cx, Editor::move_to_start_of_paragraph);
219 register_action(view, cx, Editor::move_to_end_of_paragraph);
220 register_action(view, cx, Editor::move_to_beginning);
221 register_action(view, cx, Editor::move_to_end);
222 register_action(view, cx, Editor::select_up);
223 register_action(view, cx, Editor::select_down);
224 register_action(view, cx, Editor::select_left);
225 register_action(view, cx, Editor::select_right);
226 register_action(view, cx, Editor::select_to_previous_word_start);
227 register_action(view, cx, Editor::select_to_previous_subword_start);
228 register_action(view, cx, Editor::select_to_next_word_end);
229 register_action(view, cx, Editor::select_to_next_subword_end);
230 register_action(view, cx, Editor::select_to_beginning_of_line);
231 register_action(view, cx, Editor::select_to_end_of_line);
232 register_action(view, cx, Editor::select_to_start_of_paragraph);
233 register_action(view, cx, Editor::select_to_end_of_paragraph);
234 register_action(view, cx, Editor::select_to_beginning);
235 register_action(view, cx, Editor::select_to_end);
236 register_action(view, cx, Editor::select_all);
237 register_action(view, cx, |editor, action, cx| {
238 editor.select_all_matches(action, cx).log_err();
239 });
240 register_action(view, cx, Editor::select_line);
241 register_action(view, cx, Editor::split_selection_into_lines);
242 register_action(view, cx, Editor::add_selection_above);
243 register_action(view, cx, Editor::add_selection_below);
244 register_action(view, cx, |editor, action, cx| {
245 editor.select_next(action, cx).log_err();
246 });
247 register_action(view, cx, |editor, action, cx| {
248 editor.select_previous(action, cx).log_err();
249 });
250 register_action(view, cx, Editor::toggle_comments);
251 register_action(view, cx, Editor::select_larger_syntax_node);
252 register_action(view, cx, Editor::select_smaller_syntax_node);
253 register_action(view, cx, Editor::move_to_enclosing_bracket);
254 register_action(view, cx, Editor::undo_selection);
255 register_action(view, cx, Editor::redo_selection);
256 register_action(view, cx, Editor::go_to_diagnostic);
257 register_action(view, cx, Editor::go_to_prev_diagnostic);
258 register_action(view, cx, Editor::go_to_hunk);
259 register_action(view, cx, Editor::go_to_prev_hunk);
260 register_action(view, cx, Editor::go_to_definition);
261 register_action(view, cx, Editor::go_to_definition_split);
262 register_action(view, cx, Editor::go_to_type_definition);
263 register_action(view, cx, Editor::go_to_type_definition_split);
264 register_action(view, cx, Editor::fold);
265 register_action(view, cx, Editor::fold_at);
266 register_action(view, cx, Editor::unfold_lines);
267 register_action(view, cx, Editor::unfold_at);
268 register_action(view, cx, Editor::fold_selected_ranges);
269 register_action(view, cx, Editor::show_completions);
270 register_action(view, cx, Editor::toggle_code_actions);
271 register_action(view, cx, Editor::open_excerpts);
272 register_action(view, cx, Editor::toggle_soft_wrap);
273 register_action(view, cx, Editor::toggle_inlay_hints);
274 register_action(view, cx, hover_popover::hover);
275 register_action(view, cx, Editor::reveal_in_finder);
276 register_action(view, cx, Editor::copy_path);
277 register_action(view, cx, Editor::copy_relative_path);
278 register_action(view, cx, Editor::copy_highlight_json);
279 register_action(view, cx, |editor, action, cx| {
280 if let Some(task) = editor.format(action, cx) {
281 task.detach_and_log_err(cx);
282 } else {
283 cx.propagate();
284 }
285 });
286 register_action(view, cx, Editor::restart_language_server);
287 register_action(view, cx, Editor::show_character_palette);
288 register_action(view, cx, |editor, action, cx| {
289 if let Some(task) = editor.confirm_completion(action, cx) {
290 task.detach_and_log_err(cx);
291 } else {
292 cx.propagate();
293 }
294 });
295 register_action(view, cx, |editor, action, cx| {
296 if let Some(task) = editor.confirm_code_action(action, cx) {
297 task.detach_and_log_err(cx);
298 } else {
299 cx.propagate();
300 }
301 });
302 register_action(view, cx, |editor, action, cx| {
303 if let Some(task) = editor.rename(action, cx) {
304 task.detach_and_log_err(cx);
305 } else {
306 cx.propagate();
307 }
308 });
309 register_action(view, cx, |editor, action, cx| {
310 if let Some(task) = editor.confirm_rename(action, cx) {
311 task.detach_and_log_err(cx);
312 } else {
313 cx.propagate();
314 }
315 });
316 register_action(view, cx, |editor, action, cx| {
317 if let Some(task) = editor.find_all_references(action, cx) {
318 task.detach_and_log_err(cx);
319 } else {
320 cx.propagate();
321 }
322 });
323 register_action(view, cx, Editor::next_copilot_suggestion);
324 register_action(view, cx, Editor::previous_copilot_suggestion);
325 register_action(view, cx, Editor::copilot_suggest);
326 register_action(view, cx, Editor::context_menu_first);
327 register_action(view, cx, Editor::context_menu_prev);
328 register_action(view, cx, Editor::context_menu_next);
329 register_action(view, cx, Editor::context_menu_last);
330 }
331
332 fn register_key_listeners(&self, cx: &mut WindowContext) {
333 cx.on_key_event({
334 let editor = self.editor.clone();
335 move |event: &ModifiersChangedEvent, phase, cx| {
336 if phase != DispatchPhase::Bubble {
337 return;
338 }
339
340 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
341 cx.stop_propagation();
342 }
343 }
344 });
345 }
346
347 pub(crate) fn modifiers_changed(
348 editor: &mut Editor,
349 event: &ModifiersChangedEvent,
350 cx: &mut ViewContext<Editor>,
351 ) -> bool {
352 let pending_selection = editor.has_pending_selection();
353
354 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
355 if event.command && !pending_selection {
356 let point = point.clone();
357 let snapshot = editor.snapshot(cx);
358 let kind = point.definition_kind(event.shift);
359
360 show_link_definition(kind, editor, point, snapshot, cx);
361 return false;
362 }
363 }
364
365 {
366 if editor.link_go_to_definition_state.symbol_range.is_some()
367 || !editor.link_go_to_definition_state.definitions.is_empty()
368 {
369 editor.link_go_to_definition_state.symbol_range.take();
370 editor.link_go_to_definition_state.definitions.clear();
371 cx.notify();
372 }
373
374 editor.link_go_to_definition_state.task = None;
375
376 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
377 }
378
379 false
380 }
381
382 fn mouse_left_down(
383 editor: &mut Editor,
384 event: &MouseDownEvent,
385 position_map: &PositionMap,
386 text_bounds: Bounds<Pixels>,
387 gutter_bounds: Bounds<Pixels>,
388 stacking_order: &StackingOrder,
389 cx: &mut ViewContext<Editor>,
390 ) {
391 let mut click_count = event.click_count;
392 let modifiers = event.modifiers;
393
394 if gutter_bounds.contains_point(&event.position) {
395 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
396 } else if !text_bounds.contains_point(&event.position) {
397 return;
398 }
399 if !cx.was_top_layer(&event.position, stacking_order) {
400 return;
401 }
402
403 let point_for_position = position_map.point_for_position(text_bounds, event.position);
404 let position = point_for_position.previous_valid;
405 if modifiers.shift && modifiers.alt {
406 editor.select(
407 SelectPhase::BeginColumnar {
408 position,
409 goal_column: point_for_position.exact_unclipped.column(),
410 },
411 cx,
412 );
413 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
414 editor.select(
415 SelectPhase::Extend {
416 position,
417 click_count,
418 },
419 cx,
420 );
421 } else {
422 editor.select(
423 SelectPhase::Begin {
424 position,
425 add: modifiers.alt,
426 click_count,
427 },
428 cx,
429 );
430 }
431
432 cx.stop_propagation();
433 }
434
435 fn mouse_right_down(
436 editor: &mut Editor,
437 event: &MouseDownEvent,
438 position_map: &PositionMap,
439 text_bounds: Bounds<Pixels>,
440 cx: &mut ViewContext<Editor>,
441 ) {
442 if !text_bounds.contains_point(&event.position) {
443 return;
444 }
445 let point_for_position = position_map.point_for_position(text_bounds, event.position);
446 mouse_context_menu::deploy_context_menu(
447 editor,
448 event.position,
449 point_for_position.previous_valid,
450 cx,
451 );
452 cx.stop_propagation();
453 }
454
455 fn mouse_up(
456 editor: &mut Editor,
457 event: &MouseUpEvent,
458 position_map: &PositionMap,
459 text_bounds: Bounds<Pixels>,
460 stacking_order: &StackingOrder,
461 cx: &mut ViewContext<Editor>,
462 ) {
463 let end_selection = editor.has_pending_selection();
464 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
465
466 if end_selection {
467 editor.select(SelectPhase::End, cx);
468 }
469
470 if !pending_nonempty_selections
471 && event.modifiers.command
472 && text_bounds.contains_point(&event.position)
473 && cx.was_top_layer(&event.position, stacking_order)
474 {
475 let point = position_map.point_for_position(text_bounds, event.position);
476 let could_be_inlay = point.as_valid().is_none();
477 let split = event.modifiers.alt;
478 if event.modifiers.shift || could_be_inlay {
479 go_to_fetched_type_definition(editor, point, split, cx);
480 } else {
481 go_to_fetched_definition(editor, point, split, cx);
482 }
483
484 cx.stop_propagation();
485 } else if end_selection {
486 cx.stop_propagation();
487 }
488 }
489
490 fn mouse_moved(
491 editor: &mut Editor,
492 event: &MouseMoveEvent,
493 position_map: &PositionMap,
494 text_bounds: Bounds<Pixels>,
495 gutter_bounds: Bounds<Pixels>,
496 stacking_order: &StackingOrder,
497 cx: &mut ViewContext<Editor>,
498 ) {
499 let modifiers = event.modifiers;
500 if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
501 let point_for_position = position_map.point_for_position(text_bounds, event.position);
502 let mut scroll_delta = gpui::Point::<f32>::default();
503 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
504 let top = text_bounds.origin.y + vertical_margin;
505 let bottom = text_bounds.lower_left().y - vertical_margin;
506 if event.position.y < top {
507 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
508 }
509 if event.position.y > bottom {
510 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
511 }
512
513 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
514 let left = text_bounds.origin.x + horizontal_margin;
515 let right = text_bounds.upper_right().x - horizontal_margin;
516 if event.position.x < left {
517 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
518 }
519 if event.position.x > right {
520 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
521 }
522
523 editor.select(
524 SelectPhase::Update {
525 position: point_for_position.previous_valid,
526 goal_column: point_for_position.exact_unclipped.column(),
527 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
528 .clamp(&gpui::Point::default(), &position_map.scroll_max),
529 },
530 cx,
531 );
532 }
533
534 let text_hovered = text_bounds.contains_point(&event.position);
535 let gutter_hovered = gutter_bounds.contains_point(&event.position);
536 let was_top = cx.was_top_layer(&event.position, stacking_order);
537
538 editor.set_gutter_hovered(gutter_hovered, cx);
539
540 // Don't trigger hover popover if mouse is hovering over context menu
541 if text_hovered && was_top {
542 let point_for_position = position_map.point_for_position(text_bounds, event.position);
543
544 match point_for_position.as_valid() {
545 Some(point) => {
546 update_go_to_definition_link(
547 editor,
548 Some(GoToDefinitionTrigger::Text(point)),
549 modifiers.command,
550 modifiers.shift,
551 cx,
552 );
553 hover_at(editor, Some(point), cx);
554 }
555 None => {
556 update_inlay_link_and_hover_points(
557 &position_map.snapshot,
558 point_for_position,
559 editor,
560 modifiers.command,
561 modifiers.shift,
562 cx,
563 );
564 }
565 }
566
567 cx.stop_propagation();
568 } else {
569 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
570 hover_at(editor, None, cx);
571 if gutter_hovered && was_top {
572 cx.stop_propagation();
573 }
574 }
575 }
576
577 fn scroll(
578 editor: &mut Editor,
579 event: &ScrollWheelEvent,
580 position_map: &PositionMap,
581 bounds: &InteractiveBounds,
582 cx: &mut ViewContext<Editor>,
583 ) {
584 if !bounds.visibly_contains(&event.position, cx) {
585 return;
586 }
587
588 let line_height = position_map.line_height;
589 let max_glyph_width = position_map.em_width;
590 let (delta, axis) = match event.delta {
591 gpui::ScrollDelta::Pixels(mut pixels) => {
592 //Trackpad
593 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
594 (pixels, axis)
595 }
596
597 gpui::ScrollDelta::Lines(lines) => {
598 //Not trackpad
599 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
600 (pixels, None)
601 }
602 };
603
604 let scroll_position = position_map.snapshot.scroll_position();
605 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
606 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
607 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
608 editor.scroll(scroll_position, axis, cx);
609 cx.stop_propagation();
610 }
611
612 fn paint_background(
613 &self,
614 gutter_bounds: Bounds<Pixels>,
615 text_bounds: Bounds<Pixels>,
616 layout: &LayoutState,
617 cx: &mut WindowContext,
618 ) {
619 let bounds = gutter_bounds.union(&text_bounds);
620 let scroll_top =
621 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
622 let gutter_bg = cx.theme().colors().editor_gutter_background;
623 cx.paint_quad(
624 gutter_bounds,
625 Corners::default(),
626 gutter_bg,
627 Edges::default(),
628 transparent_black(),
629 );
630 cx.paint_quad(
631 text_bounds,
632 Corners::default(),
633 self.style.background,
634 Edges::default(),
635 transparent_black(),
636 );
637
638 if let EditorMode::Full = layout.mode {
639 let mut active_rows = layout.active_rows.iter().peekable();
640 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
641 let mut end_row = *start_row;
642 while active_rows.peek().map_or(false, |r| {
643 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
644 }) {
645 active_rows.next().unwrap();
646 end_row += 1;
647 }
648
649 if !contains_non_empty_selection {
650 let origin = point(
651 bounds.origin.x,
652 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
653 - scroll_top,
654 );
655 let size = size(
656 bounds.size.width,
657 layout.position_map.line_height * (end_row - start_row + 1) as f32,
658 );
659 let active_line_bg = cx.theme().colors().editor_active_line_background;
660 cx.paint_quad(
661 Bounds { origin, size },
662 Corners::default(),
663 active_line_bg,
664 Edges::default(),
665 transparent_black(),
666 );
667 }
668 }
669
670 if let Some(highlighted_rows) = &layout.highlighted_rows {
671 let origin = point(
672 bounds.origin.x,
673 bounds.origin.y
674 + (layout.position_map.line_height * highlighted_rows.start as f32)
675 - scroll_top,
676 );
677 let size = size(
678 bounds.size.width,
679 layout.position_map.line_height * highlighted_rows.len() as f32,
680 );
681 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
682 cx.paint_quad(
683 Bounds { origin, size },
684 Corners::default(),
685 highlighted_line_bg,
686 Edges::default(),
687 transparent_black(),
688 );
689 }
690
691 let scroll_left =
692 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
693
694 for (wrap_position, active) in layout.wrap_guides.iter() {
695 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
696 - scroll_left;
697
698 if x < text_bounds.origin.x
699 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
700 {
701 continue;
702 }
703
704 let color = if *active {
705 cx.theme().colors().editor_active_wrap_guide
706 } else {
707 cx.theme().colors().editor_wrap_guide
708 };
709 cx.paint_quad(
710 Bounds {
711 origin: point(x, text_bounds.origin.y),
712 size: size(px(1.), text_bounds.size.height),
713 },
714 Corners::default(),
715 color,
716 Edges::default(),
717 transparent_black(),
718 );
719 }
720 }
721 }
722
723 fn paint_gutter(
724 &mut self,
725 bounds: Bounds<Pixels>,
726 layout: &mut LayoutState,
727 cx: &mut WindowContext,
728 ) {
729 let line_height = layout.position_map.line_height;
730
731 let scroll_position = layout.position_map.snapshot.scroll_position();
732 let scroll_top = scroll_position.y * line_height;
733
734 let show_gutter = matches!(
735 ProjectSettings::get_global(cx).git.git_gutter,
736 Some(GitGutterSetting::TrackedFiles)
737 );
738
739 if show_gutter {
740 Self::paint_diff_hunks(bounds, layout, cx);
741 }
742
743 for (ix, line) in layout.line_numbers.iter().enumerate() {
744 if let Some(line) = line {
745 let line_origin = bounds.origin
746 + point(
747 bounds.size.width - line.width - layout.gutter_padding,
748 ix as f32 * line_height - (scroll_top % line_height),
749 );
750
751 line.paint(line_origin, line_height, cx);
752 }
753 }
754
755 cx.with_z_index(1, |cx| {
756 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
757 if let Some(mut fold_indicator) = fold_indicator {
758 let mut fold_indicator = fold_indicator.into_any_element();
759 let available_space = size(
760 AvailableSpace::MinContent,
761 AvailableSpace::Definite(line_height * 0.55),
762 );
763 let fold_indicator_size = fold_indicator.measure(available_space, cx);
764
765 let position = point(
766 bounds.size.width - layout.gutter_padding,
767 ix as f32 * line_height - (scroll_top % line_height),
768 );
769 let centering_offset = point(
770 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
771 / 2.,
772 (line_height - fold_indicator_size.height) / 2.,
773 );
774 let origin = bounds.origin + position + centering_offset;
775 fold_indicator.draw(origin, available_space, cx);
776 }
777 }
778
779 if let Some(indicator) = layout.code_actions_indicator.take() {
780 let mut button = indicator.button.into_any_element();
781 let available_space = size(
782 AvailableSpace::MinContent,
783 AvailableSpace::Definite(line_height),
784 );
785 let indicator_size = button.measure(available_space, cx);
786
787 let mut x = Pixels::ZERO;
788 let mut y = indicator.row as f32 * line_height - scroll_top;
789 // Center indicator.
790 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
791 y += (line_height - indicator_size.height) / 2.;
792
793 button.draw(bounds.origin + point(x, y), available_space, cx);
794 }
795 });
796 }
797
798 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
799 let line_height = layout.position_map.line_height;
800
801 let scroll_position = layout.position_map.snapshot.scroll_position();
802 let scroll_top = scroll_position.y * line_height;
803
804 for hunk in &layout.display_hunks {
805 let (display_row_range, status) = match hunk {
806 //TODO: This rendering is entirely a horrible hack
807 &DisplayDiffHunk::Folded { display_row: row } => {
808 let start_y = row as f32 * line_height - scroll_top;
809 let end_y = start_y + line_height;
810
811 let width = 0.275 * line_height;
812 let highlight_origin = bounds.origin + point(-width, start_y);
813 let highlight_size = size(width * 2., end_y - start_y);
814 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
815 cx.paint_quad(
816 highlight_bounds,
817 Corners::all(1. * line_height),
818 gpui::yellow(), // todo!("use the right color")
819 Edges::default(),
820 transparent_black(),
821 );
822
823 continue;
824 }
825
826 DisplayDiffHunk::Unfolded {
827 display_row_range,
828 status,
829 } => (display_row_range, status),
830 };
831
832 let color = match status {
833 DiffHunkStatus::Added => cx.theme().status().created,
834 DiffHunkStatus::Modified => cx.theme().status().modified,
835
836 //TODO: This rendering is entirely a horrible hack
837 DiffHunkStatus::Removed => {
838 let row = display_row_range.start;
839
840 let offset = line_height / 2.;
841 let start_y = row as f32 * line_height - offset - scroll_top;
842 let end_y = start_y + line_height;
843
844 let width = 0.275 * line_height;
845 let highlight_origin = bounds.origin + point(-width, start_y);
846 let highlight_size = size(width * 2., end_y - start_y);
847 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
848 cx.paint_quad(
849 highlight_bounds,
850 Corners::all(1. * line_height),
851 cx.theme().status().deleted,
852 Edges::default(),
853 transparent_black(),
854 );
855
856 continue;
857 }
858 };
859
860 let start_row = display_row_range.start;
861 let end_row = display_row_range.end;
862
863 let start_y = start_row as f32 * line_height - scroll_top;
864 let end_y = end_row as f32 * line_height - scroll_top;
865
866 let width = 0.275 * line_height;
867 let highlight_origin = bounds.origin + point(-width, start_y);
868 let highlight_size = size(width * 2., end_y - start_y);
869 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
870 cx.paint_quad(
871 highlight_bounds,
872 Corners::all(0.05 * line_height),
873 color, // todo!("use the right color")
874 Edges::default(),
875 transparent_black(),
876 );
877 }
878 }
879
880 fn paint_text(
881 &mut self,
882 text_bounds: Bounds<Pixels>,
883 layout: &mut LayoutState,
884 cx: &mut WindowContext,
885 ) {
886 let scroll_position = layout.position_map.snapshot.scroll_position();
887 let start_row = layout.visible_display_row_range.start;
888 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
889 let line_end_overshoot = 0.15 * layout.position_map.line_height;
890 let whitespace_setting = self
891 .editor
892 .read(cx)
893 .buffer
894 .read(cx)
895 .settings_at(0, cx)
896 .show_whitespaces;
897
898 cx.with_content_mask(
899 Some(ContentMask {
900 bounds: text_bounds,
901 }),
902 |cx| {
903 if text_bounds.contains_point(&cx.mouse_position()) {
904 if self
905 .editor
906 .read(cx)
907 .link_go_to_definition_state
908 .definitions
909 .is_empty()
910 {
911 cx.set_cursor_style(CursorStyle::IBeam);
912 } else {
913 cx.set_cursor_style(CursorStyle::PointingHand);
914 }
915 }
916
917 let fold_corner_radius = 0.15 * layout.position_map.line_height;
918 cx.with_element_id(Some("folds"), |cx| {
919 let snapshot = &layout.position_map.snapshot;
920 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
921 let fold_range = fold.range.clone();
922 let display_range = fold.range.start.to_display_point(&snapshot)
923 ..fold.range.end.to_display_point(&snapshot);
924 debug_assert_eq!(display_range.start.row(), display_range.end.row());
925 let row = display_range.start.row();
926
927 let line_layout = &layout.position_map.line_layouts
928 [(row - layout.visible_display_row_range.start) as usize]
929 .line;
930 let start_x = content_origin.x
931 + line_layout.x_for_index(display_range.start.column() as usize)
932 - layout.position_map.scroll_position.x;
933 let start_y = content_origin.y
934 + row as f32 * layout.position_map.line_height
935 - layout.position_map.scroll_position.y;
936 let end_x = content_origin.x
937 + line_layout.x_for_index(display_range.end.column() as usize)
938 - layout.position_map.scroll_position.x;
939
940 let fold_bounds = Bounds {
941 origin: point(start_x, start_y),
942 size: size(end_x - start_x, layout.position_map.line_height),
943 };
944
945 let fold_background = cx.with_z_index(1, |cx| {
946 div()
947 .id(fold.id)
948 .size_full()
949 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
950 .on_click(cx.listener_for(
951 &self.editor,
952 move |editor: &mut Editor, _, cx| {
953 editor.unfold_ranges(
954 [fold_range.start..fold_range.end],
955 true,
956 false,
957 cx,
958 );
959 cx.stop_propagation();
960 },
961 ))
962 .draw(
963 fold_bounds.origin,
964 fold_bounds.size,
965 cx,
966 |fold_element_state, cx| {
967 if fold_element_state.is_active() {
968 gpui::blue()
969 } else if fold_bounds.contains_point(&cx.mouse_position()) {
970 gpui::black()
971 } else {
972 gpui::red()
973 }
974 },
975 )
976 });
977
978 self.paint_highlighted_range(
979 display_range.clone(),
980 fold_background,
981 fold_corner_radius,
982 fold_corner_radius * 2.,
983 layout,
984 content_origin,
985 text_bounds,
986 cx,
987 );
988 }
989 });
990
991 for (range, color) in &layout.highlighted_ranges {
992 self.paint_highlighted_range(
993 range.clone(),
994 *color,
995 Pixels::ZERO,
996 line_end_overshoot,
997 layout,
998 content_origin,
999 text_bounds,
1000 cx,
1001 );
1002 }
1003
1004 let mut cursors = SmallVec::<[Cursor; 32]>::new();
1005 let corner_radius = 0.15 * layout.position_map.line_height;
1006 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
1007
1008 for (selection_style, selections) in &layout.selections {
1009 for selection in selections {
1010 self.paint_highlighted_range(
1011 selection.range.clone(),
1012 selection_style.selection,
1013 corner_radius,
1014 corner_radius * 2.,
1015 layout,
1016 content_origin,
1017 text_bounds,
1018 cx,
1019 );
1020
1021 if selection.is_local && !selection.range.is_empty() {
1022 invisible_display_ranges.push(selection.range.clone());
1023 }
1024
1025 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1026 let cursor_position = selection.head;
1027 if layout
1028 .visible_display_row_range
1029 .contains(&cursor_position.row())
1030 {
1031 let cursor_row_layout = &layout.position_map.line_layouts
1032 [(cursor_position.row() - start_row) as usize]
1033 .line;
1034 let cursor_column = cursor_position.column() as usize;
1035
1036 let cursor_character_x =
1037 cursor_row_layout.x_for_index(cursor_column);
1038 let mut block_width = cursor_row_layout
1039 .x_for_index(cursor_column + 1)
1040 - cursor_character_x;
1041 if block_width == Pixels::ZERO {
1042 block_width = layout.position_map.em_width;
1043 }
1044 let block_text = if let CursorShape::Block = selection.cursor_shape
1045 {
1046 layout
1047 .position_map
1048 .snapshot
1049 .chars_at(cursor_position)
1050 .next()
1051 .and_then(|(character, _)| {
1052 let text = SharedString::from(character.to_string());
1053 let len = text.len();
1054 cx.text_system()
1055 .shape_line(
1056 text,
1057 cursor_row_layout.font_size,
1058 &[TextRun {
1059 len,
1060 font: self.style.text.font(),
1061 color: self.style.background,
1062 background_color: None,
1063 underline: None,
1064 }],
1065 )
1066 .log_err()
1067 })
1068 } else {
1069 None
1070 };
1071
1072 let x = cursor_character_x - layout.position_map.scroll_position.x;
1073 let y = cursor_position.row() as f32
1074 * layout.position_map.line_height
1075 - layout.position_map.scroll_position.y;
1076 if selection.is_newest {
1077 self.editor.update(cx, |editor, _| {
1078 editor.pixel_position_of_newest_cursor = Some(point(
1079 text_bounds.origin.x + x + block_width / 2.,
1080 text_bounds.origin.y
1081 + y
1082 + layout.position_map.line_height / 2.,
1083 ))
1084 });
1085 }
1086 cursors.push(Cursor {
1087 color: selection_style.cursor,
1088 block_width,
1089 origin: point(x, y),
1090 line_height: layout.position_map.line_height,
1091 shape: selection.cursor_shape,
1092 block_text,
1093 });
1094 }
1095 }
1096 }
1097 }
1098
1099 for (ix, line_with_invisibles) in
1100 layout.position_map.line_layouts.iter().enumerate()
1101 {
1102 let row = start_row + ix as u32;
1103 line_with_invisibles.draw(
1104 layout,
1105 row,
1106 content_origin,
1107 whitespace_setting,
1108 &invisible_display_ranges,
1109 cx,
1110 )
1111 }
1112
1113 cx.with_z_index(0, |cx| {
1114 for cursor in cursors {
1115 cursor.paint(content_origin, cx);
1116 }
1117 });
1118
1119 cx.with_z_index(1, |cx| {
1120 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1121 let available_space =
1122 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1123 let context_menu_size = context_menu.measure(available_space, cx);
1124
1125 let cursor_row_layout = &layout.position_map.line_layouts
1126 [(position.row() - start_row) as usize]
1127 .line;
1128 let x = cursor_row_layout.x_for_index(position.column() as usize)
1129 - layout.position_map.scroll_position.x;
1130 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1131 - layout.position_map.scroll_position.y;
1132 let mut list_origin = content_origin + point(x, y);
1133 let list_width = context_menu_size.width;
1134 let list_height = context_menu_size.height;
1135
1136 // Snap the right edge of the list to the right edge of the window if
1137 // its horizontal bounds overflow.
1138 if list_origin.x + list_width > cx.viewport_size().width {
1139 list_origin.x =
1140 (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1141 }
1142
1143 if list_origin.y + list_height > text_bounds.lower_right().y {
1144 list_origin.y -= layout.position_map.line_height + list_height;
1145 }
1146
1147 cx.break_content_mask(|cx| {
1148 context_menu.draw(list_origin, available_space, cx)
1149 });
1150 }
1151
1152 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1153 let available_space =
1154 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1155
1156 // This is safe because we check on layout whether the required row is available
1157 let hovered_row_layout = &layout.position_map.line_layouts
1158 [(position.row() - start_row) as usize]
1159 .line;
1160
1161 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1162 // height. This is the size we will use to decide whether to render popovers above or below
1163 // the hovered line.
1164 let first_size = hover_popovers[0].measure(available_space, cx);
1165 let height_to_reserve = first_size.height
1166 + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1167
1168 // Compute Hovered Point
1169 let x = hovered_row_layout.x_for_index(position.column() as usize)
1170 - layout.position_map.scroll_position.x;
1171 let y = position.row() as f32 * layout.position_map.line_height
1172 - layout.position_map.scroll_position.y;
1173 let hovered_point = content_origin + point(x, y);
1174
1175 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1176 // There is enough space above. Render popovers above the hovered point
1177 let mut current_y = hovered_point.y;
1178 for mut hover_popover in hover_popovers {
1179 let size = hover_popover.measure(available_space, cx);
1180 let mut popover_origin =
1181 point(hovered_point.x, current_y - size.height);
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 cx.break_content_mask(|cx| {
1190 hover_popover.draw(popover_origin, available_space, cx)
1191 });
1192
1193 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1194 }
1195 } else {
1196 // There is not enough space above. Render popovers below the hovered point
1197 let mut current_y = hovered_point.y + layout.position_map.line_height;
1198 for mut hover_popover in hover_popovers {
1199 let size = hover_popover.measure(available_space, cx);
1200 let mut popover_origin = point(hovered_point.x, current_y);
1201
1202 let x_out_of_bounds =
1203 text_bounds.upper_right().x - (popover_origin.x + size.width);
1204 if x_out_of_bounds < Pixels::ZERO {
1205 popover_origin.x = popover_origin.x + x_out_of_bounds;
1206 }
1207
1208 hover_popover.draw(popover_origin, available_space, cx);
1209
1210 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1211 }
1212 }
1213 }
1214
1215 if let Some(mouse_context_menu) =
1216 self.editor.read(cx).mouse_context_menu.as_ref()
1217 {
1218 let element = overlay()
1219 .position(mouse_context_menu.position)
1220 .child(mouse_context_menu.context_menu.clone())
1221 .anchor(AnchorCorner::TopLeft)
1222 .snap_to_window();
1223 element.draw(
1224 gpui::Point::default(),
1225 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1226 cx,
1227 |_, _| {},
1228 );
1229 }
1230 })
1231 },
1232 )
1233 }
1234
1235 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1236 bounds.upper_right().x - self.style.scrollbar_width
1237 }
1238
1239 fn paint_scrollbar(
1240 &mut self,
1241 bounds: Bounds<Pixels>,
1242 layout: &mut LayoutState,
1243 cx: &mut WindowContext,
1244 ) {
1245 if layout.mode != EditorMode::Full {
1246 return;
1247 }
1248
1249 let top = bounds.origin.y;
1250 let bottom = bounds.lower_left().y;
1251 let right = bounds.lower_right().x;
1252 let left = self.scrollbar_left(&bounds);
1253 let row_range = layout.scrollbar_row_range.clone();
1254 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1255
1256 let mut height = bounds.size.height;
1257 let mut first_row_y_offset = px(0.0);
1258
1259 // Impose a minimum height on the scrollbar thumb
1260 let row_height = height / max_row;
1261 let min_thumb_height = layout.position_map.line_height;
1262 let thumb_height = (row_range.end - row_range.start) * row_height;
1263 if thumb_height < min_thumb_height {
1264 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1265 height -= min_thumb_height - thumb_height;
1266 }
1267
1268 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1269
1270 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1271 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1272 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1273 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1274
1275 if layout.show_scrollbars {
1276 cx.paint_quad(
1277 track_bounds,
1278 Corners::default(),
1279 gpui::blue(), // todo!("style.track.background_color")
1280 Edges::default(), // todo!("style.track.border")
1281 transparent_black(), // todo!("style.track.border")
1282 );
1283 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1284 if layout.is_singleton && scrollbar_settings.selections {
1285 let start_anchor = Anchor::min();
1286 let end_anchor = Anchor::max();
1287 let background_ranges = self
1288 .editor
1289 .read(cx)
1290 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1291 start_anchor..end_anchor,
1292 &layout.position_map.snapshot,
1293 50000,
1294 );
1295 for range in background_ranges {
1296 let start_y = y_for_row(range.start().row() as f32);
1297 let mut end_y = y_for_row(range.end().row() as f32);
1298 if end_y - start_y < px(1.) {
1299 end_y = start_y + px(1.);
1300 }
1301 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1302 cx.paint_quad(
1303 bounds,
1304 Corners::default(),
1305 gpui::yellow(), // todo!("theme.editor.scrollbar")
1306 Edges {
1307 top: Pixels::ZERO,
1308 right: px(1.),
1309 bottom: Pixels::ZERO,
1310 left: px(1.),
1311 },
1312 gpui::green(), // todo!("style.thumb.border.color")
1313 );
1314 }
1315 }
1316
1317 if layout.is_singleton && scrollbar_settings.git_diff {
1318 for hunk in layout
1319 .position_map
1320 .snapshot
1321 .buffer_snapshot
1322 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1323 {
1324 let start_display = Point::new(hunk.buffer_range.start, 0)
1325 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1326 let end_display = Point::new(hunk.buffer_range.end, 0)
1327 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1328 let start_y = y_for_row(start_display.row() as f32);
1329 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1330 y_for_row((end_display.row() + 1) as f32)
1331 } else {
1332 y_for_row((end_display.row()) as f32)
1333 };
1334
1335 if end_y - start_y < px(1.) {
1336 end_y = start_y + px(1.);
1337 }
1338 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1339
1340 let color = match hunk.status() {
1341 DiffHunkStatus::Added => gpui::green(), // todo!("use the right color")
1342 DiffHunkStatus::Modified => gpui::yellow(), // todo!("use the right color")
1343 DiffHunkStatus::Removed => gpui::red(), // todo!("use the right color")
1344 };
1345 cx.paint_quad(
1346 bounds,
1347 Corners::default(),
1348 color,
1349 Edges {
1350 top: Pixels::ZERO,
1351 right: px(1.),
1352 bottom: Pixels::ZERO,
1353 left: px(1.),
1354 },
1355 gpui::green(), // todo!("style.thumb.border.color")
1356 );
1357 }
1358 }
1359
1360 cx.paint_quad(
1361 thumb_bounds,
1362 Corners::default(),
1363 gpui::black(), // todo!("style.thumb.background_color")
1364 Edges {
1365 top: Pixels::ZERO,
1366 right: px(1.),
1367 bottom: Pixels::ZERO,
1368 left: px(1.),
1369 },
1370 gpui::green(), // todo!("style.thumb.border.color")
1371 );
1372 }
1373
1374 let mouse_position = cx.mouse_position();
1375 if track_bounds.contains_point(&mouse_position) {
1376 cx.set_cursor_style(CursorStyle::Arrow);
1377 }
1378
1379 cx.on_mouse_event({
1380 let editor = self.editor.clone();
1381 move |event: &MouseMoveEvent, phase, cx| {
1382 if phase == DispatchPhase::Capture {
1383 return;
1384 }
1385
1386 editor.update(cx, |editor, cx| {
1387 if event.pressed_button == Some(MouseButton::Left)
1388 && editor.scroll_manager.is_dragging_scrollbar()
1389 {
1390 let y = mouse_position.y;
1391 let new_y = event.position.y;
1392 if thumb_top < y && y < thumb_bottom {
1393 let mut position = editor.scroll_position(cx);
1394 position.y += (new_y - y) * (max_row as f32) / height;
1395 if position.y < 0.0 {
1396 position.y = 0.0;
1397 }
1398 editor.set_scroll_position(position, cx);
1399 }
1400 cx.stop_propagation();
1401 } else {
1402 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1403 if track_bounds.contains_point(&event.position) {
1404 editor.scroll_manager.show_scrollbar(cx);
1405 }
1406 }
1407 })
1408 }
1409 });
1410
1411 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1412 cx.on_mouse_event({
1413 let editor = self.editor.clone();
1414 move |event: &MouseUpEvent, phase, cx| {
1415 editor.update(cx, |editor, cx| {
1416 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1417 cx.stop_propagation();
1418 });
1419 }
1420 });
1421 } else {
1422 cx.on_mouse_event({
1423 let editor = self.editor.clone();
1424 move |event: &MouseDownEvent, phase, cx| {
1425 editor.update(cx, |editor, cx| {
1426 if track_bounds.contains_point(&event.position) {
1427 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1428
1429 let y = event.position.y;
1430 if y < thumb_top || thumb_bottom < y {
1431 let center_row =
1432 ((y - top) * max_row as f32 / height).round() as u32;
1433 let top_row = center_row
1434 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1435 let mut position = editor.scroll_position(cx);
1436 position.y = top_row as f32;
1437 editor.set_scroll_position(position, cx);
1438 } else {
1439 editor.scroll_manager.show_scrollbar(cx);
1440 }
1441
1442 cx.stop_propagation();
1443 }
1444 });
1445 }
1446 });
1447 }
1448 }
1449
1450 #[allow(clippy::too_many_arguments)]
1451 fn paint_highlighted_range(
1452 &self,
1453 range: Range<DisplayPoint>,
1454 color: Hsla,
1455 corner_radius: Pixels,
1456 line_end_overshoot: Pixels,
1457 layout: &LayoutState,
1458 content_origin: gpui::Point<Pixels>,
1459 bounds: Bounds<Pixels>,
1460 cx: &mut WindowContext,
1461 ) {
1462 let start_row = layout.visible_display_row_range.start;
1463 let end_row = layout.visible_display_row_range.end;
1464 if range.start != range.end {
1465 let row_range = if range.end.column() == 0 {
1466 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1467 } else {
1468 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1469 };
1470
1471 let highlighted_range = HighlightedRange {
1472 color,
1473 line_height: layout.position_map.line_height,
1474 corner_radius,
1475 start_y: content_origin.y
1476 + row_range.start as f32 * layout.position_map.line_height
1477 - layout.position_map.scroll_position.y,
1478 lines: row_range
1479 .into_iter()
1480 .map(|row| {
1481 let line_layout =
1482 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1483 HighlightedRangeLine {
1484 start_x: if row == range.start.row() {
1485 content_origin.x
1486 + line_layout.x_for_index(range.start.column() as usize)
1487 - layout.position_map.scroll_position.x
1488 } else {
1489 content_origin.x - layout.position_map.scroll_position.x
1490 },
1491 end_x: if row == range.end.row() {
1492 content_origin.x
1493 + line_layout.x_for_index(range.end.column() as usize)
1494 - layout.position_map.scroll_position.x
1495 } else {
1496 content_origin.x + line_layout.width + line_end_overshoot
1497 - layout.position_map.scroll_position.x
1498 },
1499 }
1500 })
1501 .collect(),
1502 };
1503
1504 highlighted_range.paint(bounds, cx);
1505 }
1506 }
1507
1508 fn paint_blocks(
1509 &mut self,
1510 bounds: Bounds<Pixels>,
1511 layout: &mut LayoutState,
1512 cx: &mut WindowContext,
1513 ) {
1514 let scroll_position = layout.position_map.snapshot.scroll_position();
1515 let scroll_left = scroll_position.x * layout.position_map.em_width;
1516 let scroll_top = scroll_position.y * layout.position_map.line_height;
1517
1518 for block in layout.blocks.drain(..) {
1519 let mut origin = bounds.origin
1520 + point(
1521 Pixels::ZERO,
1522 block.row as f32 * layout.position_map.line_height - scroll_top,
1523 );
1524 if !matches!(block.style, BlockStyle::Sticky) {
1525 origin += point(-scroll_left, Pixels::ZERO);
1526 }
1527 block.element.draw(origin, block.available_space, cx);
1528 }
1529 }
1530
1531 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1532 let style = &self.style;
1533 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1534 let layout = cx
1535 .text_system()
1536 .shape_line(
1537 SharedString::from(" ".repeat(column)),
1538 font_size,
1539 &[TextRun {
1540 len: column,
1541 font: style.text.font(),
1542 color: Hsla::default(),
1543 background_color: None,
1544 underline: None,
1545 }],
1546 )
1547 .unwrap();
1548
1549 layout.width
1550 }
1551
1552 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1553 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1554 self.column_pixels(digit_count, cx)
1555 }
1556
1557 //Folds contained in a hunk are ignored apart from shrinking visual size
1558 //If a fold contains any hunks then that fold line is marked as modified
1559 fn layout_git_gutters(
1560 &self,
1561 display_rows: Range<u32>,
1562 snapshot: &EditorSnapshot,
1563 ) -> Vec<DisplayDiffHunk> {
1564 let buffer_snapshot = &snapshot.buffer_snapshot;
1565
1566 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1567 .to_point(snapshot)
1568 .row;
1569 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1570 .to_point(snapshot)
1571 .row;
1572
1573 buffer_snapshot
1574 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1575 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1576 .dedup()
1577 .collect()
1578 }
1579
1580 fn calculate_relative_line_numbers(
1581 &self,
1582 snapshot: &EditorSnapshot,
1583 rows: &Range<u32>,
1584 relative_to: Option<u32>,
1585 ) -> HashMap<u32, u32> {
1586 let mut relative_rows: HashMap<u32, u32> = Default::default();
1587 let Some(relative_to) = relative_to else {
1588 return relative_rows;
1589 };
1590
1591 let start = rows.start.min(relative_to);
1592 let end = rows.end.max(relative_to);
1593
1594 let buffer_rows = snapshot
1595 .buffer_rows(start)
1596 .take(1 + (end - start) as usize)
1597 .collect::<Vec<_>>();
1598
1599 let head_idx = relative_to - start;
1600 let mut delta = 1;
1601 let mut i = head_idx + 1;
1602 while i < buffer_rows.len() as u32 {
1603 if buffer_rows[i as usize].is_some() {
1604 if rows.contains(&(i + start)) {
1605 relative_rows.insert(i + start, delta);
1606 }
1607 delta += 1;
1608 }
1609 i += 1;
1610 }
1611 delta = 1;
1612 i = head_idx.min(buffer_rows.len() as u32 - 1);
1613 while i > 0 && buffer_rows[i as usize].is_none() {
1614 i -= 1;
1615 }
1616
1617 while i > 0 {
1618 i -= 1;
1619 if buffer_rows[i as usize].is_some() {
1620 if rows.contains(&(i + start)) {
1621 relative_rows.insert(i + start, delta);
1622 }
1623 delta += 1;
1624 }
1625 }
1626
1627 relative_rows
1628 }
1629
1630 fn shape_line_numbers(
1631 &self,
1632 rows: Range<u32>,
1633 active_rows: &BTreeMap<u32, bool>,
1634 newest_selection_head: DisplayPoint,
1635 is_singleton: bool,
1636 snapshot: &EditorSnapshot,
1637 cx: &ViewContext<Editor>,
1638 ) -> (
1639 Vec<Option<ShapedLine>>,
1640 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1641 ) {
1642 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1643 let include_line_numbers = snapshot.mode == EditorMode::Full;
1644 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1645 let mut fold_statuses = Vec::with_capacity(rows.len());
1646 let mut line_number = String::new();
1647 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1648 let relative_to = if is_relative {
1649 Some(newest_selection_head.row())
1650 } else {
1651 None
1652 };
1653
1654 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1655
1656 for (ix, row) in snapshot
1657 .buffer_rows(rows.start)
1658 .take((rows.end - rows.start) as usize)
1659 .enumerate()
1660 {
1661 let display_row = rows.start + ix as u32;
1662 let (active, color) = if active_rows.contains_key(&display_row) {
1663 (true, cx.theme().colors().editor_active_line_number)
1664 } else {
1665 (false, cx.theme().colors().editor_line_number)
1666 };
1667 if let Some(buffer_row) = row {
1668 if include_line_numbers {
1669 line_number.clear();
1670 let default_number = buffer_row + 1;
1671 let number = relative_rows
1672 .get(&(ix as u32 + rows.start))
1673 .unwrap_or(&default_number);
1674 write!(&mut line_number, "{}", number).unwrap();
1675 let run = TextRun {
1676 len: line_number.len(),
1677 font: self.style.text.font(),
1678 color,
1679 background_color: None,
1680 underline: None,
1681 };
1682 let shaped_line = cx
1683 .text_system()
1684 .shape_line(line_number.clone().into(), font_size, &[run])
1685 .unwrap();
1686 shaped_line_numbers.push(Some(shaped_line));
1687 fold_statuses.push(
1688 is_singleton
1689 .then(|| {
1690 snapshot
1691 .fold_for_line(buffer_row)
1692 .map(|fold_status| (fold_status, buffer_row, active))
1693 })
1694 .flatten(),
1695 )
1696 }
1697 } else {
1698 fold_statuses.push(None);
1699 shaped_line_numbers.push(None);
1700 }
1701 }
1702
1703 (shaped_line_numbers, fold_statuses)
1704 }
1705
1706 fn layout_lines(
1707 &self,
1708 rows: Range<u32>,
1709 line_number_layouts: &[Option<ShapedLine>],
1710 snapshot: &EditorSnapshot,
1711 cx: &ViewContext<Editor>,
1712 ) -> Vec<LineWithInvisibles> {
1713 if rows.start >= rows.end {
1714 return Vec::new();
1715 }
1716
1717 // When the editor is empty and unfocused, then show the placeholder.
1718 if snapshot.is_empty() {
1719 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1720 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1721 let placeholder_text = snapshot.placeholder_text();
1722 let placeholder_lines = placeholder_text
1723 .as_ref()
1724 .map_or("", AsRef::as_ref)
1725 .split('\n')
1726 .skip(rows.start as usize)
1727 .chain(iter::repeat(""))
1728 .take(rows.len());
1729 placeholder_lines
1730 .filter_map(move |line| {
1731 let run = TextRun {
1732 len: line.len(),
1733 font: self.style.text.font(),
1734 color: placeholder_color,
1735 background_color: None,
1736 underline: Default::default(),
1737 };
1738 cx.text_system()
1739 .shape_line(line.to_string().into(), font_size, &[run])
1740 .log_err()
1741 })
1742 .map(|line| LineWithInvisibles {
1743 line,
1744 invisibles: Vec::new(),
1745 })
1746 .collect()
1747 } else {
1748 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1749 LineWithInvisibles::from_chunks(
1750 chunks,
1751 &self.style.text,
1752 MAX_LINE_LEN,
1753 rows.len() as usize,
1754 line_number_layouts,
1755 snapshot.mode,
1756 cx,
1757 )
1758 }
1759 }
1760
1761 fn compute_layout(
1762 &mut self,
1763 mut bounds: Bounds<Pixels>,
1764 cx: &mut WindowContext,
1765 ) -> LayoutState {
1766 self.editor.update(cx, |editor, cx| {
1767 let snapshot = editor.snapshot(cx);
1768 let style = self.style.clone();
1769
1770 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1771 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1772 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1773 let em_width = cx
1774 .text_system()
1775 .typographic_bounds(font_id, font_size, 'm')
1776 .unwrap()
1777 .size
1778 .width;
1779 let em_advance = cx
1780 .text_system()
1781 .advance(font_id, font_size, 'm')
1782 .unwrap()
1783 .width;
1784
1785 let gutter_padding;
1786 let gutter_width;
1787 let gutter_margin;
1788 if snapshot.show_gutter {
1789 let descent = cx.text_system().descent(font_id, font_size);
1790
1791 let gutter_padding_factor = 3.5;
1792 gutter_padding = (em_width * gutter_padding_factor).round();
1793 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1794 gutter_margin = -descent;
1795 } else {
1796 gutter_padding = Pixels::ZERO;
1797 gutter_width = Pixels::ZERO;
1798 gutter_margin = Pixels::ZERO;
1799 };
1800
1801 editor.gutter_width = gutter_width;
1802
1803 let text_width = bounds.size.width - gutter_width;
1804 let overscroll = size(em_width, px(0.));
1805 let snapshot = {
1806 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1807
1808 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1809 let wrap_width = match editor.soft_wrap_mode(cx) {
1810 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1811 SoftWrap::EditorWidth => editor_width,
1812 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1813 };
1814
1815 if editor.set_wrap_width(Some(wrap_width), cx) {
1816 editor.snapshot(cx)
1817 } else {
1818 snapshot
1819 }
1820 };
1821
1822 let wrap_guides = editor
1823 .wrap_guides(cx)
1824 .iter()
1825 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1826 .collect::<SmallVec<[_; 2]>>();
1827
1828 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1829 let gutter_size = size(gutter_width, bounds.size.height);
1830 let text_size = size(text_width, bounds.size.height);
1831
1832 let autoscroll_horizontally =
1833 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1834 let mut snapshot = editor.snapshot(cx);
1835
1836 let scroll_position = snapshot.scroll_position();
1837 // The scroll position is a fractional point, the whole number of which represents
1838 // the top of the window in terms of display rows.
1839 let start_row = scroll_position.y as u32;
1840 let height_in_lines = f32::from(bounds.size.height / line_height);
1841 let max_row = snapshot.max_point().row();
1842
1843 // Add 1 to ensure selections bleed off screen
1844 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1845
1846 let start_anchor = if start_row == 0 {
1847 Anchor::min()
1848 } else {
1849 snapshot
1850 .buffer_snapshot
1851 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1852 };
1853 let end_anchor = if end_row > max_row {
1854 Anchor::max()
1855 } else {
1856 snapshot
1857 .buffer_snapshot
1858 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1859 };
1860
1861 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1862 let mut active_rows = BTreeMap::new();
1863 let is_singleton = editor.is_singleton(cx);
1864
1865 let highlighted_rows = editor.highlighted_rows();
1866 let highlighted_ranges = editor.background_highlights_in_range(
1867 start_anchor..end_anchor,
1868 &snapshot.display_snapshot,
1869 cx.theme().colors(),
1870 );
1871
1872 let mut newest_selection_head = None;
1873
1874 if editor.show_local_selections {
1875 let mut local_selections: Vec<Selection<Point>> = editor
1876 .selections
1877 .disjoint_in_range(start_anchor..end_anchor, cx);
1878 local_selections.extend(editor.selections.pending(cx));
1879 let mut layouts = Vec::new();
1880 let newest = editor.selections.newest(cx);
1881 for selection in local_selections.drain(..) {
1882 let is_empty = selection.start == selection.end;
1883 let is_newest = selection == newest;
1884
1885 let layout = SelectionLayout::new(
1886 selection,
1887 editor.selections.line_mode,
1888 editor.cursor_shape,
1889 &snapshot.display_snapshot,
1890 is_newest,
1891 true,
1892 );
1893 if is_newest {
1894 newest_selection_head = Some(layout.head);
1895 }
1896
1897 for row in cmp::max(layout.active_rows.start, start_row)
1898 ..=cmp::min(layout.active_rows.end, end_row)
1899 {
1900 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1901 *contains_non_empty_selection |= !is_empty;
1902 }
1903 layouts.push(layout);
1904 }
1905
1906 selections.push((style.local_player, layouts));
1907 }
1908
1909 if let Some(collaboration_hub) = &editor.collaboration_hub {
1910 // When following someone, render the local selections in their color.
1911 if let Some(leader_id) = editor.leader_peer_id {
1912 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1913 if let Some(participant_index) = collaboration_hub
1914 .user_participant_indices(cx)
1915 .get(&collaborator.user_id)
1916 {
1917 if let Some((local_selection_style, _)) = selections.first_mut() {
1918 *local_selection_style = cx
1919 .theme()
1920 .players()
1921 .color_for_participant(participant_index.0);
1922 }
1923 }
1924 }
1925 }
1926
1927 let mut remote_selections = HashMap::default();
1928 for selection in snapshot.remote_selections_in_range(
1929 &(start_anchor..end_anchor),
1930 collaboration_hub.as_ref(),
1931 cx,
1932 ) {
1933 let selection_style = if let Some(participant_index) = selection.participant_index {
1934 cx.theme()
1935 .players()
1936 .color_for_participant(participant_index.0)
1937 } else {
1938 cx.theme().players().absent()
1939 };
1940
1941 // Don't re-render the leader's selections, since the local selections
1942 // match theirs.
1943 if Some(selection.peer_id) == editor.leader_peer_id {
1944 continue;
1945 }
1946
1947 remote_selections
1948 .entry(selection.replica_id)
1949 .or_insert((selection_style, Vec::new()))
1950 .1
1951 .push(SelectionLayout::new(
1952 selection.selection,
1953 selection.line_mode,
1954 selection.cursor_shape,
1955 &snapshot.display_snapshot,
1956 false,
1957 false,
1958 ));
1959 }
1960
1961 selections.extend(remote_selections.into_values());
1962 }
1963
1964 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1965 let show_scrollbars = match scrollbar_settings.show {
1966 ShowScrollbar::Auto => {
1967 // Git
1968 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1969 ||
1970 // Selections
1971 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1972 // Scrollmanager
1973 || editor.scroll_manager.scrollbars_visible()
1974 }
1975 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1976 ShowScrollbar::Always => true,
1977 ShowScrollbar::Never => false,
1978 };
1979
1980 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1981 let newest = editor.selections.newest::<Point>(cx);
1982 SelectionLayout::new(
1983 newest,
1984 editor.selections.line_mode,
1985 editor.cursor_shape,
1986 &snapshot.display_snapshot,
1987 true,
1988 true,
1989 )
1990 .head
1991 });
1992
1993 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1994 start_row..end_row,
1995 &active_rows,
1996 head_for_relative,
1997 is_singleton,
1998 &snapshot,
1999 cx,
2000 );
2001
2002 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2003
2004 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2005
2006 let mut max_visible_line_width = Pixels::ZERO;
2007 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2008 for line_with_invisibles in &line_layouts {
2009 if line_with_invisibles.line.width > max_visible_line_width {
2010 max_visible_line_width = line_with_invisibles.line.width;
2011 }
2012 }
2013
2014 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2015 .unwrap()
2016 .width;
2017 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2018
2019 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2020 self.layout_blocks(
2021 start_row..end_row,
2022 &snapshot,
2023 bounds.size.width,
2024 scroll_width,
2025 gutter_padding,
2026 gutter_width,
2027 em_width,
2028 gutter_width + gutter_margin,
2029 line_height,
2030 &style,
2031 &line_layouts,
2032 editor,
2033 cx,
2034 )
2035 });
2036
2037 let scroll_max = point(
2038 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2039 max_row as f32,
2040 );
2041
2042 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2043
2044 let autoscrolled = if autoscroll_horizontally {
2045 editor.autoscroll_horizontally(
2046 start_row,
2047 text_size.width,
2048 scroll_width,
2049 em_width,
2050 &line_layouts,
2051 cx,
2052 )
2053 } else {
2054 false
2055 };
2056
2057 if clamped || autoscrolled {
2058 snapshot = editor.snapshot(cx);
2059 }
2060
2061 let mut context_menu = None;
2062 let mut code_actions_indicator = None;
2063 if let Some(newest_selection_head) = newest_selection_head {
2064 if (start_row..end_row).contains(&newest_selection_head.row()) {
2065 if editor.context_menu_visible() {
2066 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2067 context_menu =
2068 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2069 }
2070
2071 let active = matches!(
2072 editor.context_menu.read().as_ref(),
2073 Some(crate::ContextMenu::CodeActions(_))
2074 );
2075
2076 code_actions_indicator = editor
2077 .render_code_actions_indicator(&style, active, cx)
2078 .map(|element| CodeActionsIndicator {
2079 row: newest_selection_head.row(),
2080 button: element,
2081 });
2082 }
2083 }
2084
2085 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2086 let max_size = size(
2087 (120. * em_width) // Default size
2088 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2089 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2090 (16. * line_height) // Default size
2091 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2092 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2093 );
2094
2095 let mut hover = editor.hover_state.render(
2096 &snapshot,
2097 &style,
2098 visible_rows,
2099 max_size,
2100 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2101 cx,
2102 );
2103
2104 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2105 editor.render_fold_indicators(
2106 fold_statuses,
2107 &style,
2108 editor.gutter_hovered,
2109 line_height,
2110 gutter_margin,
2111 cx,
2112 )
2113 });
2114
2115 let invisible_symbol_font_size = font_size / 2.;
2116 let tab_invisible = cx
2117 .text_system()
2118 .shape_line(
2119 "→".into(),
2120 invisible_symbol_font_size,
2121 &[TextRun {
2122 len: "→".len(),
2123 font: self.style.text.font(),
2124 color: cx.theme().colors().editor_invisible,
2125 background_color: None,
2126 underline: None,
2127 }],
2128 )
2129 .unwrap();
2130 let space_invisible = cx
2131 .text_system()
2132 .shape_line(
2133 "•".into(),
2134 invisible_symbol_font_size,
2135 &[TextRun {
2136 len: "•".len(),
2137 font: self.style.text.font(),
2138 color: cx.theme().colors().editor_invisible,
2139 background_color: None,
2140 underline: None,
2141 }],
2142 )
2143 .unwrap();
2144
2145 LayoutState {
2146 mode: snapshot.mode,
2147 position_map: Arc::new(PositionMap {
2148 size: bounds.size,
2149 scroll_position: point(
2150 scroll_position.x * em_width,
2151 scroll_position.y * line_height,
2152 ),
2153 scroll_max,
2154 line_layouts,
2155 line_height,
2156 em_width,
2157 em_advance,
2158 snapshot,
2159 }),
2160 visible_anchor_range: start_anchor..end_anchor,
2161 visible_display_row_range: start_row..end_row,
2162 wrap_guides,
2163 gutter_size,
2164 gutter_padding,
2165 text_size,
2166 scrollbar_row_range,
2167 show_scrollbars,
2168 is_singleton,
2169 max_row,
2170 gutter_margin,
2171 active_rows,
2172 highlighted_rows,
2173 highlighted_ranges,
2174 line_numbers,
2175 display_hunks,
2176 blocks,
2177 selections,
2178 context_menu,
2179 code_actions_indicator,
2180 fold_indicators,
2181 tab_invisible,
2182 space_invisible,
2183 hover_popovers: hover,
2184 }
2185 })
2186 }
2187
2188 #[allow(clippy::too_many_arguments)]
2189 fn layout_blocks(
2190 &self,
2191 rows: Range<u32>,
2192 snapshot: &EditorSnapshot,
2193 editor_width: Pixels,
2194 scroll_width: Pixels,
2195 gutter_padding: Pixels,
2196 gutter_width: Pixels,
2197 em_width: Pixels,
2198 text_x: Pixels,
2199 line_height: Pixels,
2200 style: &EditorStyle,
2201 line_layouts: &[LineWithInvisibles],
2202 editor: &mut Editor,
2203 cx: &mut ViewContext<Editor>,
2204 ) -> (Pixels, Vec<BlockLayout>) {
2205 let mut block_id = 0;
2206 let scroll_x = snapshot.scroll_anchor.offset.x;
2207 let (fixed_blocks, non_fixed_blocks) = snapshot
2208 .blocks_in_range(rows.clone())
2209 .partition::<Vec<_>, _>(|(_, block)| match block {
2210 TransformBlock::ExcerptHeader { .. } => false,
2211 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2212 });
2213
2214 let mut render_block = |block: &TransformBlock,
2215 available_space: Size<AvailableSpace>,
2216 block_id: usize,
2217 editor: &mut Editor,
2218 cx: &mut ViewContext<Editor>| {
2219 let mut element = match block {
2220 TransformBlock::Custom(block) => {
2221 let align_to = block
2222 .position()
2223 .to_point(&snapshot.buffer_snapshot)
2224 .to_display_point(snapshot);
2225 let anchor_x = text_x
2226 + if rows.contains(&align_to.row()) {
2227 line_layouts[(align_to.row() - rows.start) as usize]
2228 .line
2229 .x_for_index(align_to.column() as usize)
2230 } else {
2231 layout_line(align_to.row(), snapshot, style, cx)
2232 .unwrap()
2233 .x_for_index(align_to.column() as usize)
2234 };
2235
2236 block.render(&mut BlockContext {
2237 view_context: cx,
2238 anchor_x,
2239 gutter_padding,
2240 line_height,
2241 gutter_width,
2242 em_width,
2243 block_id,
2244 editor_style: &self.style,
2245 })
2246 }
2247
2248 TransformBlock::ExcerptHeader {
2249 buffer,
2250 range,
2251 starts_new_buffer,
2252 ..
2253 } => {
2254 let include_root = editor
2255 .project
2256 .as_ref()
2257 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2258 .unwrap_or_default();
2259
2260 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2261 let jump_path = ProjectPath {
2262 worktree_id: file.worktree_id(cx),
2263 path: file.path.clone(),
2264 };
2265 let jump_anchor = range
2266 .primary
2267 .as_ref()
2268 .map_or(range.context.start, |primary| primary.start);
2269 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2270
2271 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2272 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2273 });
2274
2275 jump_handler
2276 });
2277
2278 let element = if *starts_new_buffer {
2279 let path = buffer.resolve_file_path(cx, include_root);
2280 let mut filename = None;
2281 let mut parent_path = None;
2282 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2283 if let Some(path) = path {
2284 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2285 parent_path = path
2286 .parent()
2287 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2288 }
2289
2290 let is_open = true;
2291
2292 div().id("path header container").size_full().p_1p5().child(
2293 h_stack()
2294 .id("path header block")
2295 .py_1p5()
2296 .pl_3()
2297 .pr_2()
2298 .rounded_lg()
2299 .shadow_md()
2300 .border()
2301 .border_color(cx.theme().colors().border)
2302 .bg(cx.theme().colors().editor_subheader_background)
2303 .justify_between()
2304 .cursor_pointer()
2305 .hover(|style| style.bg(cx.theme().colors().element_hover))
2306 .on_click(cx.listener(|_editor, _event, _cx| {
2307 // TODO: Implement collapsing path headers
2308 todo!("Clicking path header")
2309 }))
2310 .child(
2311 h_stack()
2312 .gap_3()
2313 // TODO: Add open/close state and toggle action
2314 .child(
2315 div().border().border_color(gpui::red()).child(
2316 ButtonLike::new("path-header-disclosure-control")
2317 .style(ButtonStyle::Subtle)
2318 .child(IconElement::new(match is_open {
2319 true => Icon::ChevronDown,
2320 false => Icon::ChevronRight,
2321 })),
2322 ),
2323 )
2324 .child(
2325 h_stack()
2326 .gap_2()
2327 .child(Label::new(
2328 filename
2329 .map(SharedString::from)
2330 .unwrap_or_else(|| "untitled".into()),
2331 ))
2332 .when_some(parent_path, |then, path| {
2333 then.child(Label::new(path).color(Color::Muted))
2334 }),
2335 ),
2336 )
2337 .children(jump_handler.map(|jump_handler| {
2338 IconButton::new(block_id, Icon::ArrowUpRight)
2339 .style(ButtonStyle::Subtle)
2340 .on_click(jump_handler)
2341 .tooltip(|cx| {
2342 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2343 })
2344 })), // .p_x(gutter_padding)
2345 )
2346 } else {
2347 let text_style = style.text.clone();
2348 h_stack()
2349 .id("collapsed context")
2350 .size_full()
2351 .gap(gutter_padding)
2352 .child(
2353 h_stack()
2354 .justify_end()
2355 .flex_none()
2356 .w(gutter_width - gutter_padding)
2357 .h_full()
2358 .text_buffer(cx)
2359 .text_color(cx.theme().colors().editor_line_number)
2360 .child("..."),
2361 )
2362 .map(|this| {
2363 if let Some(jump_handler) = jump_handler {
2364 this.child(
2365 ButtonLike::new("jump to collapsed context")
2366 .style(ButtonStyle::Transparent)
2367 .full_width()
2368 .on_click(jump_handler)
2369 .tooltip(|cx| {
2370 Tooltip::for_action(
2371 "Jump to Buffer",
2372 &OpenExcerpts,
2373 cx,
2374 )
2375 })
2376 .child(
2377 div()
2378 .h_px()
2379 .w_full()
2380 .bg(cx.theme().colors().border_variant)
2381 .group_hover("", |style| {
2382 style.bg(cx.theme().colors().border)
2383 }),
2384 ),
2385 )
2386 } else {
2387 this.child(div().size_full().bg(gpui::green()))
2388 }
2389 })
2390 // .child("⋯")
2391 // .children(jump_icon) // .p_x(gutter_padding)
2392 };
2393 element.into_any()
2394 }
2395 };
2396
2397 let size = element.measure(available_space, cx);
2398 (element, size)
2399 };
2400
2401 let mut fixed_block_max_width = Pixels::ZERO;
2402 let mut blocks = Vec::new();
2403 for (row, block) in fixed_blocks {
2404 let available_space = size(
2405 AvailableSpace::MinContent,
2406 AvailableSpace::Definite(block.height() as f32 * line_height),
2407 );
2408 let (element, element_size) =
2409 render_block(block, available_space, block_id, editor, cx);
2410 block_id += 1;
2411 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2412 blocks.push(BlockLayout {
2413 row,
2414 element,
2415 available_space,
2416 style: BlockStyle::Fixed,
2417 });
2418 }
2419 for (row, block) in non_fixed_blocks {
2420 let style = match block {
2421 TransformBlock::Custom(block) => block.style(),
2422 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2423 };
2424 let width = match style {
2425 BlockStyle::Sticky => editor_width,
2426 BlockStyle::Flex => editor_width
2427 .max(fixed_block_max_width)
2428 .max(gutter_width + scroll_width),
2429 BlockStyle::Fixed => unreachable!(),
2430 };
2431 let available_space = size(
2432 AvailableSpace::Definite(width),
2433 AvailableSpace::Definite(block.height() as f32 * line_height),
2434 );
2435 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2436 block_id += 1;
2437 blocks.push(BlockLayout {
2438 row,
2439 element,
2440 available_space,
2441 style,
2442 });
2443 }
2444 (
2445 scroll_width.max(fixed_block_max_width - gutter_width),
2446 blocks,
2447 )
2448 }
2449
2450 fn paint_mouse_listeners(
2451 &mut self,
2452 bounds: Bounds<Pixels>,
2453 gutter_bounds: Bounds<Pixels>,
2454 text_bounds: Bounds<Pixels>,
2455 layout: &LayoutState,
2456 cx: &mut WindowContext,
2457 ) {
2458 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2459 let interactive_bounds = InteractiveBounds {
2460 bounds: bounds.intersect(&cx.content_mask().bounds),
2461 stacking_order: cx.stacking_order().clone(),
2462 };
2463
2464 cx.on_mouse_event({
2465 let position_map = layout.position_map.clone();
2466 let editor = self.editor.clone();
2467 let interactive_bounds = interactive_bounds.clone();
2468
2469 move |event: &ScrollWheelEvent, phase, cx| {
2470 if phase != DispatchPhase::Bubble {
2471 return;
2472 }
2473
2474 editor.update(cx, |editor, cx| {
2475 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2476 });
2477 }
2478 });
2479
2480 cx.on_mouse_event({
2481 let position_map = layout.position_map.clone();
2482 let editor = self.editor.clone();
2483 let stacking_order = cx.stacking_order().clone();
2484
2485 move |event: &MouseDownEvent, phase, cx| {
2486 if phase != DispatchPhase::Bubble {
2487 return;
2488 }
2489
2490 match event.button {
2491 MouseButton::Left => editor.update(cx, |editor, cx| {
2492 Self::mouse_left_down(
2493 editor,
2494 event,
2495 &position_map,
2496 text_bounds,
2497 gutter_bounds,
2498 &stacking_order,
2499 cx,
2500 )
2501 }),
2502 MouseButton::Right => editor.update(cx, |editor, cx| {
2503 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx)
2504 }),
2505 _ => {}
2506 };
2507 }
2508 });
2509
2510 cx.on_mouse_event({
2511 let position_map = layout.position_map.clone();
2512 let editor = self.editor.clone();
2513 let stacking_order = cx.stacking_order().clone();
2514
2515 move |event: &MouseUpEvent, phase, cx| {
2516 editor.update(cx, |editor, cx| {
2517 Self::mouse_up(
2518 editor,
2519 event,
2520 &position_map,
2521 text_bounds,
2522 &stacking_order,
2523 cx,
2524 )
2525 });
2526 }
2527 });
2528 cx.on_mouse_event({
2529 let position_map = layout.position_map.clone();
2530 let editor = self.editor.clone();
2531 let stacking_order = cx.stacking_order().clone();
2532
2533 move |event: &MouseMoveEvent, phase, cx| {
2534 if phase != DispatchPhase::Bubble {
2535 return;
2536 }
2537
2538 editor.update(cx, |editor, cx| {
2539 Self::mouse_moved(
2540 editor,
2541 event,
2542 &position_map,
2543 text_bounds,
2544 gutter_bounds,
2545 &stacking_order,
2546 cx,
2547 )
2548 });
2549 }
2550 });
2551 }
2552}
2553
2554#[derive(Debug)]
2555pub struct LineWithInvisibles {
2556 pub line: ShapedLine,
2557 invisibles: Vec<Invisible>,
2558}
2559
2560impl LineWithInvisibles {
2561 fn from_chunks<'a>(
2562 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2563 text_style: &TextStyle,
2564 max_line_len: usize,
2565 max_line_count: usize,
2566 line_number_layouts: &[Option<ShapedLine>],
2567 editor_mode: EditorMode,
2568 cx: &WindowContext,
2569 ) -> Vec<Self> {
2570 let mut layouts = Vec::with_capacity(max_line_count);
2571 let mut line = String::new();
2572 let mut invisibles = Vec::new();
2573 let mut styles = Vec::new();
2574 let mut non_whitespace_added = false;
2575 let mut row = 0;
2576 let mut line_exceeded_max_len = false;
2577 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2578
2579 for highlighted_chunk in chunks.chain([HighlightedChunk {
2580 chunk: "\n",
2581 style: None,
2582 is_tab: false,
2583 }]) {
2584 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2585 if ix > 0 {
2586 let shaped_line = cx
2587 .text_system()
2588 .shape_line(line.clone().into(), font_size, &styles)
2589 .unwrap();
2590 layouts.push(Self {
2591 line: shaped_line,
2592 invisibles: invisibles.drain(..).collect(),
2593 });
2594
2595 line.clear();
2596 styles.clear();
2597 row += 1;
2598 line_exceeded_max_len = false;
2599 non_whitespace_added = false;
2600 if row == max_line_count {
2601 return layouts;
2602 }
2603 }
2604
2605 if !line_chunk.is_empty() && !line_exceeded_max_len {
2606 let text_style = if let Some(style) = highlighted_chunk.style {
2607 Cow::Owned(text_style.clone().highlight(style))
2608 } else {
2609 Cow::Borrowed(text_style)
2610 };
2611
2612 if line.len() + line_chunk.len() > max_line_len {
2613 let mut chunk_len = max_line_len - line.len();
2614 while !line_chunk.is_char_boundary(chunk_len) {
2615 chunk_len -= 1;
2616 }
2617 line_chunk = &line_chunk[..chunk_len];
2618 line_exceeded_max_len = true;
2619 }
2620
2621 styles.push(TextRun {
2622 len: line_chunk.len(),
2623 font: text_style.font(),
2624 color: text_style.color,
2625 background_color: text_style.background_color,
2626 underline: text_style.underline,
2627 });
2628
2629 if editor_mode == EditorMode::Full {
2630 // Line wrap pads its contents with fake whitespaces,
2631 // avoid printing them
2632 let inside_wrapped_string = line_number_layouts
2633 .get(row)
2634 .and_then(|layout| layout.as_ref())
2635 .is_none();
2636 if highlighted_chunk.is_tab {
2637 if non_whitespace_added || !inside_wrapped_string {
2638 invisibles.push(Invisible::Tab {
2639 line_start_offset: line.len(),
2640 });
2641 }
2642 } else {
2643 invisibles.extend(
2644 line_chunk
2645 .chars()
2646 .enumerate()
2647 .filter(|(_, line_char)| {
2648 let is_whitespace = line_char.is_whitespace();
2649 non_whitespace_added |= !is_whitespace;
2650 is_whitespace
2651 && (non_whitespace_added || !inside_wrapped_string)
2652 })
2653 .map(|(whitespace_index, _)| Invisible::Whitespace {
2654 line_offset: line.len() + whitespace_index,
2655 }),
2656 )
2657 }
2658 }
2659
2660 line.push_str(line_chunk);
2661 }
2662 }
2663 }
2664
2665 layouts
2666 }
2667
2668 fn draw(
2669 &self,
2670 layout: &LayoutState,
2671 row: u32,
2672 content_origin: gpui::Point<Pixels>,
2673 whitespace_setting: ShowWhitespaceSetting,
2674 selection_ranges: &[Range<DisplayPoint>],
2675 cx: &mut WindowContext,
2676 ) {
2677 let line_height = layout.position_map.line_height;
2678 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2679
2680 self.line.paint(
2681 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2682 line_height,
2683 cx,
2684 );
2685
2686 self.draw_invisibles(
2687 &selection_ranges,
2688 layout,
2689 content_origin,
2690 line_y,
2691 row,
2692 line_height,
2693 whitespace_setting,
2694 cx,
2695 );
2696 }
2697
2698 fn draw_invisibles(
2699 &self,
2700 selection_ranges: &[Range<DisplayPoint>],
2701 layout: &LayoutState,
2702 content_origin: gpui::Point<Pixels>,
2703 line_y: Pixels,
2704 row: u32,
2705 line_height: Pixels,
2706 whitespace_setting: ShowWhitespaceSetting,
2707 cx: &mut WindowContext,
2708 ) {
2709 let allowed_invisibles_regions = match whitespace_setting {
2710 ShowWhitespaceSetting::None => return,
2711 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2712 ShowWhitespaceSetting::All => None,
2713 };
2714
2715 for invisible in &self.invisibles {
2716 let (&token_offset, invisible_symbol) = match invisible {
2717 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2718 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2719 };
2720
2721 let x_offset = self.line.x_for_index(token_offset);
2722 let invisible_offset =
2723 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2724 let origin = content_origin
2725 + gpui::point(
2726 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2727 line_y,
2728 );
2729
2730 if let Some(allowed_regions) = allowed_invisibles_regions {
2731 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2732 if !allowed_regions
2733 .iter()
2734 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2735 {
2736 continue;
2737 }
2738 }
2739 invisible_symbol.paint(origin, line_height, cx);
2740 }
2741 }
2742}
2743
2744#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2745enum Invisible {
2746 Tab { line_start_offset: usize },
2747 Whitespace { line_offset: usize },
2748}
2749
2750impl Element for EditorElement {
2751 type State = ();
2752
2753 fn layout(
2754 &mut self,
2755 element_state: Option<Self::State>,
2756 cx: &mut gpui::WindowContext,
2757 ) -> (gpui::LayoutId, Self::State) {
2758 self.editor.update(cx, |editor, cx| {
2759 editor.set_style(self.style.clone(), cx);
2760
2761 let layout_id = match editor.mode {
2762 EditorMode::SingleLine => {
2763 let rem_size = cx.rem_size();
2764 let mut style = Style::default();
2765 style.size.width = relative(1.).into();
2766 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2767 cx.request_layout(&style, None)
2768 }
2769 EditorMode::AutoHeight { max_lines } => {
2770 let editor_handle = cx.view().clone();
2771 let max_line_number_width =
2772 self.max_line_number_width(&editor.snapshot(cx), cx);
2773 cx.request_measured_layout(
2774 Style::default(),
2775 move |known_dimensions, available_space, cx| {
2776 editor_handle
2777 .update(cx, |editor, cx| {
2778 compute_auto_height_layout(
2779 editor,
2780 max_lines,
2781 max_line_number_width,
2782 known_dimensions,
2783 cx,
2784 )
2785 })
2786 .unwrap_or_default()
2787 },
2788 )
2789 }
2790 EditorMode::Full => {
2791 let mut style = Style::default();
2792 style.size.width = relative(1.).into();
2793 style.size.height = relative(1.).into();
2794 cx.request_layout(&style, None)
2795 }
2796 };
2797
2798 (layout_id, ())
2799 })
2800 }
2801
2802 fn paint(
2803 mut self,
2804 bounds: Bounds<gpui::Pixels>,
2805 element_state: &mut Self::State,
2806 cx: &mut gpui::WindowContext,
2807 ) {
2808 let editor = self.editor.clone();
2809
2810 let mut layout = self.compute_layout(bounds, cx);
2811 let gutter_bounds = Bounds {
2812 origin: bounds.origin,
2813 size: layout.gutter_size,
2814 };
2815 let text_bounds = Bounds {
2816 origin: gutter_bounds.upper_right(),
2817 size: layout.text_size,
2818 };
2819
2820 let focus_handle = editor.focus_handle(cx);
2821 let key_context = self.editor.read(cx).key_context(cx);
2822 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2823 self.register_actions(cx);
2824 self.register_key_listeners(cx);
2825
2826 // We call with_z_index to establish a new stacking context.
2827 cx.with_z_index(0, |cx| {
2828 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2829 // Paint mouse listeners at z-index 0 so any elements we paint on top of the editor
2830 // take precedence.
2831 cx.with_z_index(0, |cx| {
2832 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2833 });
2834 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2835 cx.handle_input(&focus_handle, input_handler);
2836
2837 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2838 if layout.gutter_size.width > Pixels::ZERO {
2839 self.paint_gutter(gutter_bounds, &mut layout, cx);
2840 }
2841 self.paint_text(text_bounds, &mut layout, cx);
2842
2843 if !layout.blocks.is_empty() {
2844 cx.with_z_index(1, |cx| {
2845 cx.with_element_id(Some("editor_blocks"), |cx| {
2846 self.paint_blocks(bounds, &mut layout, cx);
2847 });
2848 })
2849 }
2850
2851 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2852 });
2853 });
2854 })
2855 }
2856}
2857
2858impl IntoElement for EditorElement {
2859 type Element = Self;
2860
2861 fn element_id(&self) -> Option<gpui::ElementId> {
2862 self.editor.element_id()
2863 }
2864
2865 fn into_element(self) -> Self::Element {
2866 self
2867 }
2868}
2869
2870type BufferRow = u32;
2871
2872pub struct LayoutState {
2873 position_map: Arc<PositionMap>,
2874 gutter_size: Size<Pixels>,
2875 gutter_padding: Pixels,
2876 gutter_margin: Pixels,
2877 text_size: gpui::Size<Pixels>,
2878 mode: EditorMode,
2879 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2880 visible_anchor_range: Range<Anchor>,
2881 visible_display_row_range: Range<u32>,
2882 active_rows: BTreeMap<u32, bool>,
2883 highlighted_rows: Option<Range<u32>>,
2884 line_numbers: Vec<Option<ShapedLine>>,
2885 display_hunks: Vec<DisplayDiffHunk>,
2886 blocks: Vec<BlockLayout>,
2887 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2888 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2889 scrollbar_row_range: Range<f32>,
2890 show_scrollbars: bool,
2891 is_singleton: bool,
2892 max_row: u32,
2893 context_menu: Option<(DisplayPoint, AnyElement)>,
2894 code_actions_indicator: Option<CodeActionsIndicator>,
2895 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2896 fold_indicators: Vec<Option<IconButton>>,
2897 tab_invisible: ShapedLine,
2898 space_invisible: ShapedLine,
2899}
2900
2901struct CodeActionsIndicator {
2902 row: u32,
2903 button: IconButton,
2904}
2905
2906struct PositionMap {
2907 size: Size<Pixels>,
2908 line_height: Pixels,
2909 scroll_position: gpui::Point<Pixels>,
2910 scroll_max: gpui::Point<f32>,
2911 em_width: Pixels,
2912 em_advance: Pixels,
2913 line_layouts: Vec<LineWithInvisibles>,
2914 snapshot: EditorSnapshot,
2915}
2916
2917#[derive(Debug, Copy, Clone)]
2918pub struct PointForPosition {
2919 pub previous_valid: DisplayPoint,
2920 pub next_valid: DisplayPoint,
2921 pub exact_unclipped: DisplayPoint,
2922 pub column_overshoot_after_line_end: u32,
2923}
2924
2925impl PointForPosition {
2926 #[cfg(test)]
2927 pub fn valid(valid: DisplayPoint) -> Self {
2928 Self {
2929 previous_valid: valid,
2930 next_valid: valid,
2931 exact_unclipped: valid,
2932 column_overshoot_after_line_end: 0,
2933 }
2934 }
2935
2936 pub fn as_valid(&self) -> Option<DisplayPoint> {
2937 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2938 Some(self.previous_valid)
2939 } else {
2940 None
2941 }
2942 }
2943}
2944
2945impl PositionMap {
2946 fn point_for_position(
2947 &self,
2948 text_bounds: Bounds<Pixels>,
2949 position: gpui::Point<Pixels>,
2950 ) -> PointForPosition {
2951 let scroll_position = self.snapshot.scroll_position();
2952 let position = position - text_bounds.origin;
2953 let y = position.y.max(px(0.)).min(self.size.height);
2954 let x = position.x + (scroll_position.x * self.em_width);
2955 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2956
2957 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2958 .line_layouts
2959 .get(row as usize - scroll_position.y as usize)
2960 .map(|&LineWithInvisibles { ref line, .. }| line)
2961 {
2962 if let Some(ix) = line.index_for_x(x) {
2963 (ix as u32, px(0.))
2964 } else {
2965 (line.len as u32, px(0.).max(x - line.width))
2966 }
2967 } else {
2968 (0, x)
2969 };
2970
2971 let mut exact_unclipped = DisplayPoint::new(row, column);
2972 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2973 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2974
2975 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2976 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2977 PointForPosition {
2978 previous_valid,
2979 next_valid,
2980 exact_unclipped,
2981 column_overshoot_after_line_end,
2982 }
2983 }
2984}
2985
2986struct BlockLayout {
2987 row: u32,
2988 element: AnyElement,
2989 available_space: Size<AvailableSpace>,
2990 style: BlockStyle,
2991}
2992
2993fn layout_line(
2994 row: u32,
2995 snapshot: &EditorSnapshot,
2996 style: &EditorStyle,
2997 cx: &WindowContext,
2998) -> Result<ShapedLine> {
2999 let mut line = snapshot.line(row);
3000
3001 if line.len() > MAX_LINE_LEN {
3002 let mut len = MAX_LINE_LEN;
3003 while !line.is_char_boundary(len) {
3004 len -= 1;
3005 }
3006
3007 line.truncate(len);
3008 }
3009
3010 cx.text_system().shape_line(
3011 line.into(),
3012 style.text.font_size.to_pixels(cx.rem_size()),
3013 &[TextRun {
3014 len: snapshot.line_len(row) as usize,
3015 font: style.text.font(),
3016 color: Hsla::default(),
3017 background_color: None,
3018 underline: None,
3019 }],
3020 )
3021}
3022
3023#[derive(Debug)]
3024pub struct Cursor {
3025 origin: gpui::Point<Pixels>,
3026 block_width: Pixels,
3027 line_height: Pixels,
3028 color: Hsla,
3029 shape: CursorShape,
3030 block_text: Option<ShapedLine>,
3031}
3032
3033impl Cursor {
3034 pub fn new(
3035 origin: gpui::Point<Pixels>,
3036 block_width: Pixels,
3037 line_height: Pixels,
3038 color: Hsla,
3039 shape: CursorShape,
3040 block_text: Option<ShapedLine>,
3041 ) -> Cursor {
3042 Cursor {
3043 origin,
3044 block_width,
3045 line_height,
3046 color,
3047 shape,
3048 block_text,
3049 }
3050 }
3051
3052 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3053 Bounds {
3054 origin: self.origin + origin,
3055 size: size(self.block_width, self.line_height),
3056 }
3057 }
3058
3059 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3060 let bounds = match self.shape {
3061 CursorShape::Bar => Bounds {
3062 origin: self.origin + origin,
3063 size: size(px(2.0), self.line_height),
3064 },
3065 CursorShape::Block | CursorShape::Hollow => Bounds {
3066 origin: self.origin + origin,
3067 size: size(self.block_width, self.line_height),
3068 },
3069 CursorShape::Underscore => Bounds {
3070 origin: self.origin
3071 + origin
3072 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3073 size: size(self.block_width, px(2.0)),
3074 },
3075 };
3076
3077 //Draw background or border quad
3078 if matches!(self.shape, CursorShape::Hollow) {
3079 cx.paint_quad(
3080 bounds,
3081 Corners::default(),
3082 transparent_black(),
3083 Edges::all(px(1.)),
3084 self.color,
3085 );
3086 } else {
3087 cx.paint_quad(
3088 bounds,
3089 Corners::default(),
3090 self.color,
3091 Edges::default(),
3092 transparent_black(),
3093 );
3094 }
3095
3096 if let Some(block_text) = &self.block_text {
3097 block_text.paint(self.origin + origin, self.line_height, cx);
3098 }
3099 }
3100
3101 pub fn shape(&self) -> CursorShape {
3102 self.shape
3103 }
3104}
3105
3106#[derive(Debug)]
3107pub struct HighlightedRange {
3108 pub start_y: Pixels,
3109 pub line_height: Pixels,
3110 pub lines: Vec<HighlightedRangeLine>,
3111 pub color: Hsla,
3112 pub corner_radius: Pixels,
3113}
3114
3115#[derive(Debug)]
3116pub struct HighlightedRangeLine {
3117 pub start_x: Pixels,
3118 pub end_x: Pixels,
3119}
3120
3121impl HighlightedRange {
3122 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3123 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3124 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3125 self.paint_lines(
3126 self.start_y + self.line_height,
3127 &self.lines[1..],
3128 bounds,
3129 cx,
3130 );
3131 } else {
3132 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3133 }
3134 }
3135
3136 fn paint_lines(
3137 &self,
3138 start_y: Pixels,
3139 lines: &[HighlightedRangeLine],
3140 bounds: Bounds<Pixels>,
3141 cx: &mut WindowContext,
3142 ) {
3143 if lines.is_empty() {
3144 return;
3145 }
3146
3147 let first_line = lines.first().unwrap();
3148 let last_line = lines.last().unwrap();
3149
3150 let first_top_left = point(first_line.start_x, start_y);
3151 let first_top_right = point(first_line.end_x, start_y);
3152
3153 let curve_height = point(Pixels::ZERO, self.corner_radius);
3154 let curve_width = |start_x: Pixels, end_x: Pixels| {
3155 let max = (end_x - start_x) / 2.;
3156 let width = if max < self.corner_radius {
3157 max
3158 } else {
3159 self.corner_radius
3160 };
3161
3162 point(width, Pixels::ZERO)
3163 };
3164
3165 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3166 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3167 path.curve_to(first_top_right + curve_height, first_top_right);
3168
3169 let mut iter = lines.iter().enumerate().peekable();
3170 while let Some((ix, line)) = iter.next() {
3171 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3172
3173 if let Some((_, next_line)) = iter.peek() {
3174 let next_top_right = point(next_line.end_x, bottom_right.y);
3175
3176 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3177 Ordering::Equal => {
3178 path.line_to(bottom_right);
3179 }
3180 Ordering::Less => {
3181 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3182 path.line_to(bottom_right - curve_height);
3183 if self.corner_radius > Pixels::ZERO {
3184 path.curve_to(bottom_right - curve_width, bottom_right);
3185 }
3186 path.line_to(next_top_right + curve_width);
3187 if self.corner_radius > Pixels::ZERO {
3188 path.curve_to(next_top_right + curve_height, next_top_right);
3189 }
3190 }
3191 Ordering::Greater => {
3192 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3193 path.line_to(bottom_right - curve_height);
3194 if self.corner_radius > Pixels::ZERO {
3195 path.curve_to(bottom_right + curve_width, bottom_right);
3196 }
3197 path.line_to(next_top_right - curve_width);
3198 if self.corner_radius > Pixels::ZERO {
3199 path.curve_to(next_top_right + curve_height, next_top_right);
3200 }
3201 }
3202 }
3203 } else {
3204 let curve_width = curve_width(line.start_x, line.end_x);
3205 path.line_to(bottom_right - curve_height);
3206 if self.corner_radius > Pixels::ZERO {
3207 path.curve_to(bottom_right - curve_width, bottom_right);
3208 }
3209
3210 let bottom_left = point(line.start_x, bottom_right.y);
3211 path.line_to(bottom_left + curve_width);
3212 if self.corner_radius > Pixels::ZERO {
3213 path.curve_to(bottom_left - curve_height, bottom_left);
3214 }
3215 }
3216 }
3217
3218 if first_line.start_x > last_line.start_x {
3219 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3220 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3221 path.line_to(second_top_left + curve_height);
3222 if self.corner_radius > Pixels::ZERO {
3223 path.curve_to(second_top_left + curve_width, second_top_left);
3224 }
3225 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3226 path.line_to(first_bottom_left - curve_width);
3227 if self.corner_radius > Pixels::ZERO {
3228 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3229 }
3230 }
3231
3232 path.line_to(first_top_left + curve_height);
3233 if self.corner_radius > Pixels::ZERO {
3234 path.curve_to(first_top_left + top_curve_width, first_top_left);
3235 }
3236 path.line_to(first_top_right - top_curve_width);
3237
3238 cx.paint_path(path, self.color);
3239 }
3240}
3241
3242pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3243 (delta.pow(1.5) / 100.0).into()
3244}
3245
3246fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3247 (delta.pow(1.2) / 300.0).into()
3248}
3249
3250#[cfg(test)]
3251mod tests {
3252 use super::*;
3253 use crate::{
3254 display_map::{BlockDisposition, BlockProperties},
3255 editor_tests::{init_test, update_test_language_settings},
3256 Editor, MultiBuffer,
3257 };
3258 use gpui::{EmptyView, TestAppContext};
3259 use language::language_settings;
3260 use log::info;
3261 use std::{num::NonZeroU32, sync::Arc};
3262 use util::test::sample_text;
3263
3264 #[gpui::test]
3265 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3266 init_test(cx, |_| {});
3267 let window = cx.add_window(|cx| {
3268 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3269 Editor::new(EditorMode::Full, buffer, None, cx)
3270 });
3271
3272 let editor = window.root(cx).unwrap();
3273 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3274 let element = EditorElement::new(&editor, style);
3275
3276 let layouts = window
3277 .update(cx, |editor, cx| {
3278 let snapshot = editor.snapshot(cx);
3279 element
3280 .shape_line_numbers(
3281 0..6,
3282 &Default::default(),
3283 DisplayPoint::new(0, 0),
3284 false,
3285 &snapshot,
3286 cx,
3287 )
3288 .0
3289 })
3290 .unwrap();
3291 assert_eq!(layouts.len(), 6);
3292
3293 let relative_rows = window
3294 .update(cx, |editor, cx| {
3295 let snapshot = editor.snapshot(cx);
3296 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3297 })
3298 .unwrap();
3299 assert_eq!(relative_rows[&0], 3);
3300 assert_eq!(relative_rows[&1], 2);
3301 assert_eq!(relative_rows[&2], 1);
3302 // current line has no relative number
3303 assert_eq!(relative_rows[&4], 1);
3304 assert_eq!(relative_rows[&5], 2);
3305
3306 // works if cursor is before screen
3307 let relative_rows = window
3308 .update(cx, |editor, cx| {
3309 let snapshot = editor.snapshot(cx);
3310
3311 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3312 })
3313 .unwrap();
3314 assert_eq!(relative_rows.len(), 3);
3315 assert_eq!(relative_rows[&3], 2);
3316 assert_eq!(relative_rows[&4], 3);
3317 assert_eq!(relative_rows[&5], 4);
3318
3319 // works if cursor is after screen
3320 let relative_rows = window
3321 .update(cx, |editor, cx| {
3322 let snapshot = editor.snapshot(cx);
3323
3324 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3325 })
3326 .unwrap();
3327 assert_eq!(relative_rows.len(), 3);
3328 assert_eq!(relative_rows[&0], 5);
3329 assert_eq!(relative_rows[&1], 4);
3330 assert_eq!(relative_rows[&2], 3);
3331 }
3332
3333 #[gpui::test]
3334 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3335 init_test(cx, |_| {});
3336
3337 let window = cx.add_window(|cx| {
3338 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3339 Editor::new(EditorMode::Full, buffer, None, cx)
3340 });
3341 let editor = window.root(cx).unwrap();
3342 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3343 let mut element = EditorElement::new(&editor, style);
3344
3345 window
3346 .update(cx, |editor, cx| {
3347 editor.cursor_shape = CursorShape::Block;
3348 editor.change_selections(None, cx, |s| {
3349 s.select_ranges([
3350 Point::new(0, 0)..Point::new(1, 0),
3351 Point::new(3, 2)..Point::new(3, 3),
3352 Point::new(5, 6)..Point::new(6, 0),
3353 ]);
3354 });
3355 })
3356 .unwrap();
3357 let state = cx
3358 .update_window(window.into(), |_, cx| {
3359 element.compute_layout(
3360 Bounds {
3361 origin: point(px(500.), px(500.)),
3362 size: size(px(500.), px(500.)),
3363 },
3364 cx,
3365 )
3366 })
3367 .unwrap();
3368
3369 assert_eq!(state.selections.len(), 1);
3370 let local_selections = &state.selections[0].1;
3371 assert_eq!(local_selections.len(), 3);
3372 // moves cursor back one line
3373 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3374 assert_eq!(
3375 local_selections[0].range,
3376 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3377 );
3378
3379 // moves cursor back one column
3380 assert_eq!(
3381 local_selections[1].range,
3382 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3383 );
3384 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3385
3386 // leaves cursor on the max point
3387 assert_eq!(
3388 local_selections[2].range,
3389 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3390 );
3391 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3392
3393 // active lines does not include 1 (even though the range of the selection does)
3394 assert_eq!(
3395 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3396 vec![0, 3, 5, 6]
3397 );
3398
3399 // multi-buffer support
3400 // in DisplayPoint co-ordinates, this is what we're dealing with:
3401 // 0: [[file
3402 // 1: header]]
3403 // 2: aaaaaa
3404 // 3: bbbbbb
3405 // 4: cccccc
3406 // 5:
3407 // 6: ...
3408 // 7: ffffff
3409 // 8: gggggg
3410 // 9: hhhhhh
3411 // 10:
3412 // 11: [[file
3413 // 12: header]]
3414 // 13: bbbbbb
3415 // 14: cccccc
3416 // 15: dddddd
3417 let window = cx.add_window(|cx| {
3418 let buffer = MultiBuffer::build_multi(
3419 [
3420 (
3421 &(sample_text(8, 6, 'a') + "\n"),
3422 vec![
3423 Point::new(0, 0)..Point::new(3, 0),
3424 Point::new(4, 0)..Point::new(7, 0),
3425 ],
3426 ),
3427 (
3428 &(sample_text(8, 6, 'a') + "\n"),
3429 vec![Point::new(1, 0)..Point::new(3, 0)],
3430 ),
3431 ],
3432 cx,
3433 );
3434 Editor::new(EditorMode::Full, buffer, None, cx)
3435 });
3436 let editor = window.root(cx).unwrap();
3437 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3438 let mut element = EditorElement::new(&editor, style);
3439 let state = window.update(cx, |editor, cx| {
3440 editor.cursor_shape = CursorShape::Block;
3441 editor.change_selections(None, cx, |s| {
3442 s.select_display_ranges([
3443 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3444 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3445 ]);
3446 });
3447 });
3448
3449 let state = cx
3450 .update_window(window.into(), |_, cx| {
3451 element.compute_layout(
3452 Bounds {
3453 origin: point(px(500.), px(500.)),
3454 size: size(px(500.), px(500.)),
3455 },
3456 cx,
3457 )
3458 })
3459 .unwrap();
3460 assert_eq!(state.selections.len(), 1);
3461 let local_selections = &state.selections[0].1;
3462 assert_eq!(local_selections.len(), 2);
3463
3464 // moves cursor on excerpt boundary back a line
3465 // and doesn't allow selection to bleed through
3466 assert_eq!(
3467 local_selections[0].range,
3468 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3469 );
3470 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3471 // moves cursor on buffer boundary back two lines
3472 // and doesn't allow selection to bleed through
3473 assert_eq!(
3474 local_selections[1].range,
3475 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3476 );
3477 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3478 }
3479
3480 #[gpui::test]
3481 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3482 init_test(cx, |_| {});
3483
3484 let window = cx.add_window(|cx| {
3485 let buffer = MultiBuffer::build_simple("", cx);
3486 Editor::new(EditorMode::Full, buffer, None, cx)
3487 });
3488 let editor = window.root(cx).unwrap();
3489 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3490 window
3491 .update(cx, |editor, cx| {
3492 editor.set_placeholder_text("hello", cx);
3493 editor.insert_blocks(
3494 [BlockProperties {
3495 style: BlockStyle::Fixed,
3496 disposition: BlockDisposition::Above,
3497 height: 3,
3498 position: Anchor::min(),
3499 render: Arc::new(|_| div().into_any()),
3500 }],
3501 None,
3502 cx,
3503 );
3504
3505 // Blur the editor so that it displays placeholder text.
3506 cx.blur();
3507 })
3508 .unwrap();
3509
3510 let mut element = EditorElement::new(&editor, style);
3511 let mut state = cx
3512 .update_window(window.into(), |_, cx| {
3513 element.compute_layout(
3514 Bounds {
3515 origin: point(px(500.), px(500.)),
3516 size: size(px(500.), px(500.)),
3517 },
3518 cx,
3519 )
3520 })
3521 .unwrap();
3522 let size = state.position_map.size;
3523
3524 assert_eq!(state.position_map.line_layouts.len(), 4);
3525 assert_eq!(
3526 state
3527 .line_numbers
3528 .iter()
3529 .map(Option::is_some)
3530 .collect::<Vec<_>>(),
3531 &[false, false, false, true]
3532 );
3533
3534 // Don't panic.
3535 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3536 cx.update_window(window.into(), |_, cx| {
3537 element.paint(bounds, &mut (), cx);
3538 })
3539 .unwrap()
3540 }
3541
3542 #[gpui::test]
3543 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3544 const TAB_SIZE: u32 = 4;
3545
3546 let input_text = "\t \t|\t| a b";
3547 let expected_invisibles = vec![
3548 Invisible::Tab {
3549 line_start_offset: 0,
3550 },
3551 Invisible::Whitespace {
3552 line_offset: TAB_SIZE as usize,
3553 },
3554 Invisible::Tab {
3555 line_start_offset: TAB_SIZE as usize + 1,
3556 },
3557 Invisible::Tab {
3558 line_start_offset: TAB_SIZE as usize * 2 + 1,
3559 },
3560 Invisible::Whitespace {
3561 line_offset: TAB_SIZE as usize * 3 + 1,
3562 },
3563 Invisible::Whitespace {
3564 line_offset: TAB_SIZE as usize * 3 + 3,
3565 },
3566 ];
3567 assert_eq!(
3568 expected_invisibles.len(),
3569 input_text
3570 .chars()
3571 .filter(|initial_char| initial_char.is_whitespace())
3572 .count(),
3573 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3574 );
3575
3576 init_test(cx, |s| {
3577 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3578 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3579 });
3580
3581 let actual_invisibles =
3582 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3583
3584 assert_eq!(expected_invisibles, actual_invisibles);
3585 }
3586
3587 #[gpui::test]
3588 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3589 init_test(cx, |s| {
3590 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3591 s.defaults.tab_size = NonZeroU32::new(4);
3592 });
3593
3594 for editor_mode_without_invisibles in [
3595 EditorMode::SingleLine,
3596 EditorMode::AutoHeight { max_lines: 100 },
3597 ] {
3598 let invisibles = collect_invisibles_from_new_editor(
3599 cx,
3600 editor_mode_without_invisibles,
3601 "\t\t\t| | a b",
3602 px(500.0),
3603 );
3604 assert!(invisibles.is_empty(),
3605 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3606 }
3607 }
3608
3609 #[gpui::test]
3610 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3611 let tab_size = 4;
3612 let input_text = "a\tbcd ".repeat(9);
3613 let repeated_invisibles = [
3614 Invisible::Tab {
3615 line_start_offset: 1,
3616 },
3617 Invisible::Whitespace {
3618 line_offset: tab_size as usize + 3,
3619 },
3620 Invisible::Whitespace {
3621 line_offset: tab_size as usize + 4,
3622 },
3623 Invisible::Whitespace {
3624 line_offset: tab_size as usize + 5,
3625 },
3626 ];
3627 let expected_invisibles = std::iter::once(repeated_invisibles)
3628 .cycle()
3629 .take(9)
3630 .flatten()
3631 .collect::<Vec<_>>();
3632 assert_eq!(
3633 expected_invisibles.len(),
3634 input_text
3635 .chars()
3636 .filter(|initial_char| initial_char.is_whitespace())
3637 .count(),
3638 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3639 );
3640 info!("Expected invisibles: {expected_invisibles:?}");
3641
3642 init_test(cx, |_| {});
3643
3644 // Put the same string with repeating whitespace pattern into editors of various size,
3645 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3646 let resize_step = 10.0;
3647 let mut editor_width = 200.0;
3648 while editor_width <= 1000.0 {
3649 update_test_language_settings(cx, |s| {
3650 s.defaults.tab_size = NonZeroU32::new(tab_size);
3651 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3652 s.defaults.preferred_line_length = Some(editor_width as u32);
3653 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3654 });
3655
3656 let actual_invisibles = collect_invisibles_from_new_editor(
3657 cx,
3658 EditorMode::Full,
3659 &input_text,
3660 px(editor_width),
3661 );
3662
3663 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3664 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3665 let mut i = 0;
3666 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3667 i = actual_index;
3668 match expected_invisibles.get(i) {
3669 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3670 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3671 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3672 _ => {
3673 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3674 }
3675 },
3676 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3677 }
3678 }
3679 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3680 assert!(
3681 missing_expected_invisibles.is_empty(),
3682 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3683 );
3684
3685 editor_width += resize_step;
3686 }
3687 }
3688
3689 fn collect_invisibles_from_new_editor(
3690 cx: &mut TestAppContext,
3691 editor_mode: EditorMode,
3692 input_text: &str,
3693 editor_width: Pixels,
3694 ) -> Vec<Invisible> {
3695 info!(
3696 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3697 editor_width.0
3698 );
3699 let window = cx.add_window(|cx| {
3700 let buffer = MultiBuffer::build_simple(&input_text, cx);
3701 Editor::new(editor_mode, buffer, None, cx)
3702 });
3703 let editor = window.root(cx).unwrap();
3704 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3705 let mut element = EditorElement::new(&editor, style);
3706 window
3707 .update(cx, |editor, cx| {
3708 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3709 editor.set_wrap_width(Some(editor_width), cx);
3710 })
3711 .unwrap();
3712 let layout_state = cx
3713 .update_window(window.into(), |_, cx| {
3714 element.compute_layout(
3715 Bounds {
3716 origin: point(px(500.), px(500.)),
3717 size: size(px(500.), px(500.)),
3718 },
3719 cx,
3720 )
3721 })
3722 .unwrap();
3723
3724 layout_state
3725 .position_map
3726 .line_layouts
3727 .iter()
3728 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3729 .flatten()
3730 .cloned()
3731 .collect()
3732 }
3733}
3734
3735pub fn register_action<T: Action>(
3736 view: &View<Editor>,
3737 cx: &mut WindowContext,
3738 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3739) {
3740 let view = view.clone();
3741 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3742 let action = action.downcast_ref().unwrap();
3743 if phase == DispatchPhase::Bubble {
3744 view.update(cx, |editor, cx| {
3745 listener(editor, action, cx);
3746 })
3747 }
3748 })
3749}
3750
3751fn compute_auto_height_layout(
3752 editor: &mut Editor,
3753 max_lines: usize,
3754 max_line_number_width: Pixels,
3755 known_dimensions: Size<Option<Pixels>>,
3756 cx: &mut ViewContext<Editor>,
3757) -> Option<Size<Pixels>> {
3758 let mut width = known_dimensions.width?;
3759 if let Some(height) = known_dimensions.height {
3760 return Some(size(width, height));
3761 }
3762
3763 let style = editor.style.as_ref().unwrap();
3764 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3765 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3766 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3767 let em_width = cx
3768 .text_system()
3769 .typographic_bounds(font_id, font_size, 'm')
3770 .unwrap()
3771 .size
3772 .width;
3773
3774 let mut snapshot = editor.snapshot(cx);
3775 let gutter_padding;
3776 let gutter_width;
3777 let gutter_margin;
3778 if snapshot.show_gutter {
3779 let descent = cx.text_system().descent(font_id, font_size);
3780 let gutter_padding_factor = 3.5;
3781 gutter_padding = (em_width * gutter_padding_factor).round();
3782 gutter_width = max_line_number_width + gutter_padding * 2.0;
3783 gutter_margin = -descent;
3784 } else {
3785 gutter_padding = Pixels::ZERO;
3786 gutter_width = Pixels::ZERO;
3787 gutter_margin = Pixels::ZERO;
3788 };
3789
3790 editor.gutter_width = gutter_width;
3791 let text_width = width - gutter_width;
3792 let overscroll = size(em_width, px(0.));
3793
3794 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3795 if editor.set_wrap_width(Some(editor_width), cx) {
3796 snapshot = editor.snapshot(cx);
3797 }
3798
3799 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3800 let height = scroll_height
3801 .max(line_height)
3802 .min(line_height * max_lines as f32);
3803
3804 Some(size(width, height))
3805}