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(&event.position) {
395 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
396 } else if !text_bounds.contains(&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(&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(&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(&event.position);
535 let gutter_hovered = gutter_bounds.contains(&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(&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(&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 // todo!() currently shape_line panics if text conatins newlines
1053 let text = if character == '\n' {
1054 SharedString::from(" ")
1055 } else {
1056 SharedString::from(character.to_string())
1057 };
1058 let len = text.len();
1059 cx.text_system()
1060 .shape_line(
1061 text,
1062 cursor_row_layout.font_size,
1063 &[TextRun {
1064 len,
1065 font: self.style.text.font(),
1066 color: self.style.background,
1067 background_color: None,
1068 underline: None,
1069 }],
1070 )
1071 .log_err()
1072 })
1073 } else {
1074 None
1075 };
1076
1077 let x = cursor_character_x - layout.position_map.scroll_position.x;
1078 let y = cursor_position.row() as f32
1079 * layout.position_map.line_height
1080 - layout.position_map.scroll_position.y;
1081 if selection.is_newest {
1082 self.editor.update(cx, |editor, _| {
1083 editor.pixel_position_of_newest_cursor = Some(point(
1084 text_bounds.origin.x + x + block_width / 2.,
1085 text_bounds.origin.y
1086 + y
1087 + layout.position_map.line_height / 2.,
1088 ))
1089 });
1090 }
1091 cursors.push(Cursor {
1092 color: selection_style.cursor,
1093 block_width,
1094 origin: point(x, y),
1095 line_height: layout.position_map.line_height,
1096 shape: selection.cursor_shape,
1097 block_text,
1098 });
1099 }
1100 }
1101 }
1102 }
1103
1104 for (ix, line_with_invisibles) in
1105 layout.position_map.line_layouts.iter().enumerate()
1106 {
1107 let row = start_row + ix as u32;
1108 line_with_invisibles.draw(
1109 layout,
1110 row,
1111 content_origin,
1112 whitespace_setting,
1113 &invisible_display_ranges,
1114 cx,
1115 )
1116 }
1117
1118 cx.with_z_index(0, |cx| {
1119 for cursor in cursors {
1120 cursor.paint(content_origin, cx);
1121 }
1122 });
1123
1124 cx.with_z_index(1, |cx| {
1125 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1126 let available_space =
1127 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1128 let context_menu_size = context_menu.measure(available_space, cx);
1129
1130 let cursor_row_layout = &layout.position_map.line_layouts
1131 [(position.row() - start_row) as usize]
1132 .line;
1133 let x = cursor_row_layout.x_for_index(position.column() as usize)
1134 - layout.position_map.scroll_position.x;
1135 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1136 - layout.position_map.scroll_position.y;
1137 let mut list_origin = content_origin + point(x, y);
1138 let list_width = context_menu_size.width;
1139 let list_height = context_menu_size.height;
1140
1141 // Snap the right edge of the list to the right edge of the window if
1142 // its horizontal bounds overflow.
1143 if list_origin.x + list_width > cx.viewport_size().width {
1144 list_origin.x =
1145 (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1146 }
1147
1148 if list_origin.y + list_height > text_bounds.lower_right().y {
1149 list_origin.y -= layout.position_map.line_height + list_height;
1150 }
1151
1152 cx.break_content_mask(|cx| {
1153 context_menu.draw(list_origin, available_space, cx)
1154 });
1155 }
1156
1157 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1158 let available_space =
1159 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1160
1161 // This is safe because we check on layout whether the required row is available
1162 let hovered_row_layout = &layout.position_map.line_layouts
1163 [(position.row() - start_row) as usize]
1164 .line;
1165
1166 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1167 // height. This is the size we will use to decide whether to render popovers above or below
1168 // the hovered line.
1169 let first_size = hover_popovers[0].measure(available_space, cx);
1170 let height_to_reserve = first_size.height
1171 + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1172
1173 // Compute Hovered Point
1174 let x = hovered_row_layout.x_for_index(position.column() as usize)
1175 - layout.position_map.scroll_position.x;
1176 let y = position.row() as f32 * layout.position_map.line_height
1177 - layout.position_map.scroll_position.y;
1178 let hovered_point = content_origin + point(x, y);
1179
1180 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1181 // There is enough space above. Render popovers above the hovered point
1182 let mut current_y = hovered_point.y;
1183 for mut hover_popover in hover_popovers {
1184 let size = hover_popover.measure(available_space, cx);
1185 let mut popover_origin =
1186 point(hovered_point.x, current_y - size.height);
1187
1188 let x_out_of_bounds =
1189 text_bounds.upper_right().x - (popover_origin.x + size.width);
1190 if x_out_of_bounds < Pixels::ZERO {
1191 popover_origin.x = popover_origin.x + x_out_of_bounds;
1192 }
1193
1194 cx.break_content_mask(|cx| {
1195 hover_popover.draw(popover_origin, available_space, cx)
1196 });
1197
1198 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1199 }
1200 } else {
1201 // There is not enough space above. Render popovers below the hovered point
1202 let mut current_y = hovered_point.y + layout.position_map.line_height;
1203 for mut hover_popover in hover_popovers {
1204 let size = hover_popover.measure(available_space, cx);
1205 let mut popover_origin = point(hovered_point.x, current_y);
1206
1207 let x_out_of_bounds =
1208 text_bounds.upper_right().x - (popover_origin.x + size.width);
1209 if x_out_of_bounds < Pixels::ZERO {
1210 popover_origin.x = popover_origin.x + x_out_of_bounds;
1211 }
1212
1213 hover_popover.draw(popover_origin, available_space, cx);
1214
1215 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1216 }
1217 }
1218 }
1219
1220 if let Some(mouse_context_menu) =
1221 self.editor.read(cx).mouse_context_menu.as_ref()
1222 {
1223 let element = overlay()
1224 .position(mouse_context_menu.position)
1225 .child(mouse_context_menu.context_menu.clone())
1226 .anchor(AnchorCorner::TopLeft)
1227 .snap_to_window();
1228 element.draw(
1229 gpui::Point::default(),
1230 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1231 cx,
1232 |_, _| {},
1233 );
1234 }
1235 })
1236 },
1237 )
1238 }
1239
1240 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1241 bounds.upper_right().x - self.style.scrollbar_width
1242 }
1243
1244 fn paint_scrollbar(
1245 &mut self,
1246 bounds: Bounds<Pixels>,
1247 layout: &mut LayoutState,
1248 cx: &mut WindowContext,
1249 ) {
1250 if layout.mode != EditorMode::Full {
1251 return;
1252 }
1253
1254 let top = bounds.origin.y;
1255 let bottom = bounds.lower_left().y;
1256 let right = bounds.lower_right().x;
1257 let left = self.scrollbar_left(&bounds);
1258 let row_range = layout.scrollbar_row_range.clone();
1259 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1260
1261 let mut height = bounds.size.height;
1262 let mut first_row_y_offset = px(0.0);
1263
1264 // Impose a minimum height on the scrollbar thumb
1265 let row_height = height / max_row;
1266 let min_thumb_height = layout.position_map.line_height;
1267 let thumb_height = (row_range.end - row_range.start) * row_height;
1268 if thumb_height < min_thumb_height {
1269 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1270 height -= min_thumb_height - thumb_height;
1271 }
1272
1273 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1274
1275 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1276 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1277 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1278 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1279
1280 if layout.show_scrollbars {
1281 cx.paint_quad(
1282 track_bounds,
1283 Corners::default(),
1284 cx.theme().colors().scrollbar_track_background,
1285 Edges {
1286 top: Pixels::ZERO,
1287 right: Pixels::ZERO,
1288 bottom: Pixels::ZERO,
1289 left: px(1.),
1290 },
1291 cx.theme().colors().scrollbar_track_border,
1292 );
1293 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1294 if layout.is_singleton && scrollbar_settings.selections {
1295 let start_anchor = Anchor::min();
1296 let end_anchor = Anchor::max();
1297 let background_ranges = self
1298 .editor
1299 .read(cx)
1300 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1301 start_anchor..end_anchor,
1302 &layout.position_map.snapshot,
1303 50000,
1304 );
1305 for range in background_ranges {
1306 let start_y = y_for_row(range.start().row() as f32);
1307 let mut end_y = y_for_row(range.end().row() as f32);
1308 if end_y - start_y < px(1.) {
1309 end_y = start_y + px(1.);
1310 }
1311 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1312 cx.paint_quad(
1313 bounds,
1314 Corners::default(),
1315 cx.theme().status().info,
1316 Edges {
1317 top: Pixels::ZERO,
1318 right: px(1.),
1319 bottom: Pixels::ZERO,
1320 left: px(1.),
1321 },
1322 cx.theme().colors().scrollbar_thumb_border,
1323 );
1324 }
1325 }
1326
1327 if layout.is_singleton && scrollbar_settings.git_diff {
1328 for hunk in layout
1329 .position_map
1330 .snapshot
1331 .buffer_snapshot
1332 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1333 {
1334 let start_display = Point::new(hunk.buffer_range.start, 0)
1335 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1336 let end_display = Point::new(hunk.buffer_range.end, 0)
1337 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1338 let start_y = y_for_row(start_display.row() as f32);
1339 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1340 y_for_row((end_display.row() + 1) as f32)
1341 } else {
1342 y_for_row((end_display.row()) as f32)
1343 };
1344
1345 if end_y - start_y < px(1.) {
1346 end_y = start_y + px(1.);
1347 }
1348 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1349
1350 let color = match hunk.status() {
1351 DiffHunkStatus::Added => cx.theme().status().created,
1352 DiffHunkStatus::Modified => cx.theme().status().modified,
1353 DiffHunkStatus::Removed => cx.theme().status().deleted,
1354 };
1355 cx.paint_quad(
1356 bounds,
1357 Corners::default(),
1358 color,
1359 Edges {
1360 top: Pixels::ZERO,
1361 right: px(1.),
1362 bottom: Pixels::ZERO,
1363 left: px(1.),
1364 },
1365 cx.theme().colors().scrollbar_thumb_border,
1366 );
1367 }
1368 }
1369
1370 cx.paint_quad(
1371 thumb_bounds,
1372 Corners::default(),
1373 cx.theme().colors().scrollbar_thumb_background,
1374 Edges {
1375 top: Pixels::ZERO,
1376 right: px(1.),
1377 bottom: Pixels::ZERO,
1378 left: px(1.),
1379 },
1380 cx.theme().colors().scrollbar_thumb_border,
1381 );
1382 }
1383
1384 let mouse_position = cx.mouse_position();
1385 if track_bounds.contains(&mouse_position) {
1386 cx.set_cursor_style(CursorStyle::Arrow);
1387 }
1388
1389 cx.on_mouse_event({
1390 let editor = self.editor.clone();
1391 move |event: &MouseMoveEvent, phase, cx| {
1392 if phase == DispatchPhase::Capture {
1393 return;
1394 }
1395
1396 editor.update(cx, |editor, cx| {
1397 if event.pressed_button == Some(MouseButton::Left)
1398 && editor.scroll_manager.is_dragging_scrollbar()
1399 {
1400 let y = mouse_position.y;
1401 let new_y = event.position.y;
1402 if thumb_top < y && y < thumb_bottom {
1403 let mut position = editor.scroll_position(cx);
1404 position.y += (new_y - y) * (max_row as f32) / height;
1405 if position.y < 0.0 {
1406 position.y = 0.0;
1407 }
1408 editor.set_scroll_position(position, cx);
1409 }
1410 cx.stop_propagation();
1411 } else {
1412 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1413 if track_bounds.contains(&event.position) {
1414 editor.scroll_manager.show_scrollbar(cx);
1415 }
1416 }
1417 })
1418 }
1419 });
1420
1421 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1422 cx.on_mouse_event({
1423 let editor = self.editor.clone();
1424 move |event: &MouseUpEvent, phase, cx| {
1425 editor.update(cx, |editor, cx| {
1426 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1427 cx.stop_propagation();
1428 });
1429 }
1430 });
1431 } else {
1432 cx.on_mouse_event({
1433 let editor = self.editor.clone();
1434 move |event: &MouseDownEvent, phase, cx| {
1435 editor.update(cx, |editor, cx| {
1436 if track_bounds.contains(&event.position) {
1437 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1438
1439 let y = event.position.y;
1440 if y < thumb_top || thumb_bottom < y {
1441 let center_row =
1442 ((y - top) * max_row as f32 / height).round() as u32;
1443 let top_row = center_row
1444 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1445 let mut position = editor.scroll_position(cx);
1446 position.y = top_row as f32;
1447 editor.set_scroll_position(position, cx);
1448 } else {
1449 editor.scroll_manager.show_scrollbar(cx);
1450 }
1451
1452 cx.stop_propagation();
1453 }
1454 });
1455 }
1456 });
1457 }
1458 }
1459
1460 #[allow(clippy::too_many_arguments)]
1461 fn paint_highlighted_range(
1462 &self,
1463 range: Range<DisplayPoint>,
1464 color: Hsla,
1465 corner_radius: Pixels,
1466 line_end_overshoot: Pixels,
1467 layout: &LayoutState,
1468 content_origin: gpui::Point<Pixels>,
1469 bounds: Bounds<Pixels>,
1470 cx: &mut WindowContext,
1471 ) {
1472 let start_row = layout.visible_display_row_range.start;
1473 let end_row = layout.visible_display_row_range.end;
1474 if range.start != range.end {
1475 let row_range = if range.end.column() == 0 {
1476 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1477 } else {
1478 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1479 };
1480
1481 let highlighted_range = HighlightedRange {
1482 color,
1483 line_height: layout.position_map.line_height,
1484 corner_radius,
1485 start_y: content_origin.y
1486 + row_range.start as f32 * layout.position_map.line_height
1487 - layout.position_map.scroll_position.y,
1488 lines: row_range
1489 .into_iter()
1490 .map(|row| {
1491 let line_layout =
1492 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1493 HighlightedRangeLine {
1494 start_x: if row == range.start.row() {
1495 content_origin.x
1496 + line_layout.x_for_index(range.start.column() as usize)
1497 - layout.position_map.scroll_position.x
1498 } else {
1499 content_origin.x - layout.position_map.scroll_position.x
1500 },
1501 end_x: if row == range.end.row() {
1502 content_origin.x
1503 + line_layout.x_for_index(range.end.column() as usize)
1504 - layout.position_map.scroll_position.x
1505 } else {
1506 content_origin.x + line_layout.width + line_end_overshoot
1507 - layout.position_map.scroll_position.x
1508 },
1509 }
1510 })
1511 .collect(),
1512 };
1513
1514 highlighted_range.paint(bounds, cx);
1515 }
1516 }
1517
1518 fn paint_blocks(
1519 &mut self,
1520 bounds: Bounds<Pixels>,
1521 layout: &mut LayoutState,
1522 cx: &mut WindowContext,
1523 ) {
1524 let scroll_position = layout.position_map.snapshot.scroll_position();
1525 let scroll_left = scroll_position.x * layout.position_map.em_width;
1526 let scroll_top = scroll_position.y * layout.position_map.line_height;
1527
1528 for block in layout.blocks.drain(..) {
1529 let mut origin = bounds.origin
1530 + point(
1531 Pixels::ZERO,
1532 block.row as f32 * layout.position_map.line_height - scroll_top,
1533 );
1534 if !matches!(block.style, BlockStyle::Sticky) {
1535 origin += point(-scroll_left, Pixels::ZERO);
1536 }
1537 block.element.draw(origin, block.available_space, cx);
1538 }
1539 }
1540
1541 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1542 let style = &self.style;
1543 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1544 let layout = cx
1545 .text_system()
1546 .shape_line(
1547 SharedString::from(" ".repeat(column)),
1548 font_size,
1549 &[TextRun {
1550 len: column,
1551 font: style.text.font(),
1552 color: Hsla::default(),
1553 background_color: None,
1554 underline: None,
1555 }],
1556 )
1557 .unwrap();
1558
1559 layout.width
1560 }
1561
1562 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1563 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1564 self.column_pixels(digit_count, cx)
1565 }
1566
1567 //Folds contained in a hunk are ignored apart from shrinking visual size
1568 //If a fold contains any hunks then that fold line is marked as modified
1569 fn layout_git_gutters(
1570 &self,
1571 display_rows: Range<u32>,
1572 snapshot: &EditorSnapshot,
1573 ) -> Vec<DisplayDiffHunk> {
1574 let buffer_snapshot = &snapshot.buffer_snapshot;
1575
1576 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1577 .to_point(snapshot)
1578 .row;
1579 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1580 .to_point(snapshot)
1581 .row;
1582
1583 buffer_snapshot
1584 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1585 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1586 .dedup()
1587 .collect()
1588 }
1589
1590 fn calculate_relative_line_numbers(
1591 &self,
1592 snapshot: &EditorSnapshot,
1593 rows: &Range<u32>,
1594 relative_to: Option<u32>,
1595 ) -> HashMap<u32, u32> {
1596 let mut relative_rows: HashMap<u32, u32> = Default::default();
1597 let Some(relative_to) = relative_to else {
1598 return relative_rows;
1599 };
1600
1601 let start = rows.start.min(relative_to);
1602 let end = rows.end.max(relative_to);
1603
1604 let buffer_rows = snapshot
1605 .buffer_rows(start)
1606 .take(1 + (end - start) as usize)
1607 .collect::<Vec<_>>();
1608
1609 let head_idx = relative_to - start;
1610 let mut delta = 1;
1611 let mut i = head_idx + 1;
1612 while i < buffer_rows.len() as u32 {
1613 if buffer_rows[i as usize].is_some() {
1614 if rows.contains(&(i + start)) {
1615 relative_rows.insert(i + start, delta);
1616 }
1617 delta += 1;
1618 }
1619 i += 1;
1620 }
1621 delta = 1;
1622 i = head_idx.min(buffer_rows.len() as u32 - 1);
1623 while i > 0 && buffer_rows[i as usize].is_none() {
1624 i -= 1;
1625 }
1626
1627 while i > 0 {
1628 i -= 1;
1629 if buffer_rows[i as usize].is_some() {
1630 if rows.contains(&(i + start)) {
1631 relative_rows.insert(i + start, delta);
1632 }
1633 delta += 1;
1634 }
1635 }
1636
1637 relative_rows
1638 }
1639
1640 fn shape_line_numbers(
1641 &self,
1642 rows: Range<u32>,
1643 active_rows: &BTreeMap<u32, bool>,
1644 newest_selection_head: DisplayPoint,
1645 is_singleton: bool,
1646 snapshot: &EditorSnapshot,
1647 cx: &ViewContext<Editor>,
1648 ) -> (
1649 Vec<Option<ShapedLine>>,
1650 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1651 ) {
1652 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1653 let include_line_numbers = snapshot.mode == EditorMode::Full;
1654 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1655 let mut fold_statuses = Vec::with_capacity(rows.len());
1656 let mut line_number = String::new();
1657 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1658 let relative_to = if is_relative {
1659 Some(newest_selection_head.row())
1660 } else {
1661 None
1662 };
1663
1664 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1665
1666 for (ix, row) in snapshot
1667 .buffer_rows(rows.start)
1668 .take((rows.end - rows.start) as usize)
1669 .enumerate()
1670 {
1671 let display_row = rows.start + ix as u32;
1672 let (active, color) = if active_rows.contains_key(&display_row) {
1673 (true, cx.theme().colors().editor_active_line_number)
1674 } else {
1675 (false, cx.theme().colors().editor_line_number)
1676 };
1677 if let Some(buffer_row) = row {
1678 if include_line_numbers {
1679 line_number.clear();
1680 let default_number = buffer_row + 1;
1681 let number = relative_rows
1682 .get(&(ix as u32 + rows.start))
1683 .unwrap_or(&default_number);
1684 write!(&mut line_number, "{}", number).unwrap();
1685 let run = TextRun {
1686 len: line_number.len(),
1687 font: self.style.text.font(),
1688 color,
1689 background_color: None,
1690 underline: None,
1691 };
1692 let shaped_line = cx
1693 .text_system()
1694 .shape_line(line_number.clone().into(), font_size, &[run])
1695 .unwrap();
1696 shaped_line_numbers.push(Some(shaped_line));
1697 fold_statuses.push(
1698 is_singleton
1699 .then(|| {
1700 snapshot
1701 .fold_for_line(buffer_row)
1702 .map(|fold_status| (fold_status, buffer_row, active))
1703 })
1704 .flatten(),
1705 )
1706 }
1707 } else {
1708 fold_statuses.push(None);
1709 shaped_line_numbers.push(None);
1710 }
1711 }
1712
1713 (shaped_line_numbers, fold_statuses)
1714 }
1715
1716 fn layout_lines(
1717 &self,
1718 rows: Range<u32>,
1719 line_number_layouts: &[Option<ShapedLine>],
1720 snapshot: &EditorSnapshot,
1721 cx: &ViewContext<Editor>,
1722 ) -> Vec<LineWithInvisibles> {
1723 if rows.start >= rows.end {
1724 return Vec::new();
1725 }
1726
1727 // When the editor is empty and unfocused, then show the placeholder.
1728 if snapshot.is_empty() {
1729 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1730 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1731 let placeholder_text = snapshot.placeholder_text();
1732 let placeholder_lines = placeholder_text
1733 .as_ref()
1734 .map_or("", AsRef::as_ref)
1735 .split('\n')
1736 .skip(rows.start as usize)
1737 .chain(iter::repeat(""))
1738 .take(rows.len());
1739 placeholder_lines
1740 .filter_map(move |line| {
1741 let run = TextRun {
1742 len: line.len(),
1743 font: self.style.text.font(),
1744 color: placeholder_color,
1745 background_color: None,
1746 underline: Default::default(),
1747 };
1748 cx.text_system()
1749 .shape_line(line.to_string().into(), font_size, &[run])
1750 .log_err()
1751 })
1752 .map(|line| LineWithInvisibles {
1753 line,
1754 invisibles: Vec::new(),
1755 })
1756 .collect()
1757 } else {
1758 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1759 LineWithInvisibles::from_chunks(
1760 chunks,
1761 &self.style.text,
1762 MAX_LINE_LEN,
1763 rows.len() as usize,
1764 line_number_layouts,
1765 snapshot.mode,
1766 cx,
1767 )
1768 }
1769 }
1770
1771 fn compute_layout(
1772 &mut self,
1773 mut bounds: Bounds<Pixels>,
1774 cx: &mut WindowContext,
1775 ) -> LayoutState {
1776 self.editor.update(cx, |editor, cx| {
1777 let snapshot = editor.snapshot(cx);
1778 let style = self.style.clone();
1779
1780 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1781 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1782 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1783 let em_width = cx
1784 .text_system()
1785 .typographic_bounds(font_id, font_size, 'm')
1786 .unwrap()
1787 .size
1788 .width;
1789 let em_advance = cx
1790 .text_system()
1791 .advance(font_id, font_size, 'm')
1792 .unwrap()
1793 .width;
1794
1795 let gutter_padding;
1796 let gutter_width;
1797 let gutter_margin;
1798 if snapshot.show_gutter {
1799 let descent = cx.text_system().descent(font_id, font_size);
1800
1801 let gutter_padding_factor = 3.5;
1802 gutter_padding = (em_width * gutter_padding_factor).round();
1803 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1804 gutter_margin = -descent;
1805 } else {
1806 gutter_padding = Pixels::ZERO;
1807 gutter_width = Pixels::ZERO;
1808 gutter_margin = Pixels::ZERO;
1809 };
1810
1811 editor.gutter_width = gutter_width;
1812
1813 let text_width = bounds.size.width - gutter_width;
1814 let overscroll = size(em_width, px(0.));
1815 let snapshot = {
1816 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1817
1818 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1819 let wrap_width = match editor.soft_wrap_mode(cx) {
1820 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1821 SoftWrap::EditorWidth => editor_width,
1822 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1823 };
1824
1825 if editor.set_wrap_width(Some(wrap_width), cx) {
1826 editor.snapshot(cx)
1827 } else {
1828 snapshot
1829 }
1830 };
1831
1832 let wrap_guides = editor
1833 .wrap_guides(cx)
1834 .iter()
1835 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1836 .collect::<SmallVec<[_; 2]>>();
1837
1838 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1839 let gutter_size = size(gutter_width, bounds.size.height);
1840 let text_size = size(text_width, bounds.size.height);
1841
1842 let autoscroll_horizontally =
1843 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1844 let mut snapshot = editor.snapshot(cx);
1845
1846 let scroll_position = snapshot.scroll_position();
1847 // The scroll position is a fractional point, the whole number of which represents
1848 // the top of the window in terms of display rows.
1849 let start_row = scroll_position.y as u32;
1850 let height_in_lines = f32::from(bounds.size.height / line_height);
1851 let max_row = snapshot.max_point().row();
1852
1853 // Add 1 to ensure selections bleed off screen
1854 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1855
1856 let start_anchor = if start_row == 0 {
1857 Anchor::min()
1858 } else {
1859 snapshot
1860 .buffer_snapshot
1861 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1862 };
1863 let end_anchor = if end_row > max_row {
1864 Anchor::max()
1865 } else {
1866 snapshot
1867 .buffer_snapshot
1868 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1869 };
1870
1871 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1872 let mut active_rows = BTreeMap::new();
1873 let is_singleton = editor.is_singleton(cx);
1874
1875 let highlighted_rows = editor.highlighted_rows();
1876 let highlighted_ranges = editor.background_highlights_in_range(
1877 start_anchor..end_anchor,
1878 &snapshot.display_snapshot,
1879 cx.theme().colors(),
1880 );
1881
1882 let mut newest_selection_head = None;
1883
1884 if editor.show_local_selections {
1885 let mut local_selections: Vec<Selection<Point>> = editor
1886 .selections
1887 .disjoint_in_range(start_anchor..end_anchor, cx);
1888 local_selections.extend(editor.selections.pending(cx));
1889 let mut layouts = Vec::new();
1890 let newest = editor.selections.newest(cx);
1891 for selection in local_selections.drain(..) {
1892 let is_empty = selection.start == selection.end;
1893 let is_newest = selection == newest;
1894
1895 let layout = SelectionLayout::new(
1896 selection,
1897 editor.selections.line_mode,
1898 editor.cursor_shape,
1899 &snapshot.display_snapshot,
1900 is_newest,
1901 true,
1902 );
1903 if is_newest {
1904 newest_selection_head = Some(layout.head);
1905 }
1906
1907 for row in cmp::max(layout.active_rows.start, start_row)
1908 ..=cmp::min(layout.active_rows.end, end_row)
1909 {
1910 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1911 *contains_non_empty_selection |= !is_empty;
1912 }
1913 layouts.push(layout);
1914 }
1915
1916 selections.push((style.local_player, layouts));
1917 }
1918
1919 if let Some(collaboration_hub) = &editor.collaboration_hub {
1920 // When following someone, render the local selections in their color.
1921 if let Some(leader_id) = editor.leader_peer_id {
1922 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1923 if let Some(participant_index) = collaboration_hub
1924 .user_participant_indices(cx)
1925 .get(&collaborator.user_id)
1926 {
1927 if let Some((local_selection_style, _)) = selections.first_mut() {
1928 *local_selection_style = cx
1929 .theme()
1930 .players()
1931 .color_for_participant(participant_index.0);
1932 }
1933 }
1934 }
1935 }
1936
1937 let mut remote_selections = HashMap::default();
1938 for selection in snapshot.remote_selections_in_range(
1939 &(start_anchor..end_anchor),
1940 collaboration_hub.as_ref(),
1941 cx,
1942 ) {
1943 let selection_style = if let Some(participant_index) = selection.participant_index {
1944 cx.theme()
1945 .players()
1946 .color_for_participant(participant_index.0)
1947 } else {
1948 cx.theme().players().absent()
1949 };
1950
1951 // Don't re-render the leader's selections, since the local selections
1952 // match theirs.
1953 if Some(selection.peer_id) == editor.leader_peer_id {
1954 continue;
1955 }
1956
1957 remote_selections
1958 .entry(selection.replica_id)
1959 .or_insert((selection_style, Vec::new()))
1960 .1
1961 .push(SelectionLayout::new(
1962 selection.selection,
1963 selection.line_mode,
1964 selection.cursor_shape,
1965 &snapshot.display_snapshot,
1966 false,
1967 false,
1968 ));
1969 }
1970
1971 selections.extend(remote_selections.into_values());
1972 }
1973
1974 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1975 let show_scrollbars = match scrollbar_settings.show {
1976 ShowScrollbar::Auto => {
1977 // Git
1978 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1979 ||
1980 // Selections
1981 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1982 // Scrollmanager
1983 || editor.scroll_manager.scrollbars_visible()
1984 }
1985 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1986 ShowScrollbar::Always => true,
1987 ShowScrollbar::Never => false,
1988 };
1989
1990 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1991 let newest = editor.selections.newest::<Point>(cx);
1992 SelectionLayout::new(
1993 newest,
1994 editor.selections.line_mode,
1995 editor.cursor_shape,
1996 &snapshot.display_snapshot,
1997 true,
1998 true,
1999 )
2000 .head
2001 });
2002
2003 let (line_numbers, fold_statuses) = self.shape_line_numbers(
2004 start_row..end_row,
2005 &active_rows,
2006 head_for_relative,
2007 is_singleton,
2008 &snapshot,
2009 cx,
2010 );
2011
2012 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2013
2014 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2015
2016 let mut max_visible_line_width = Pixels::ZERO;
2017 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2018 for line_with_invisibles in &line_layouts {
2019 if line_with_invisibles.line.width > max_visible_line_width {
2020 max_visible_line_width = line_with_invisibles.line.width;
2021 }
2022 }
2023
2024 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2025 .unwrap()
2026 .width;
2027 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2028
2029 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2030 self.layout_blocks(
2031 start_row..end_row,
2032 &snapshot,
2033 bounds.size.width,
2034 scroll_width,
2035 gutter_padding,
2036 gutter_width,
2037 em_width,
2038 gutter_width + gutter_margin,
2039 line_height,
2040 &style,
2041 &line_layouts,
2042 editor,
2043 cx,
2044 )
2045 });
2046
2047 let scroll_max = point(
2048 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2049 max_row as f32,
2050 );
2051
2052 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2053
2054 let autoscrolled = if autoscroll_horizontally {
2055 editor.autoscroll_horizontally(
2056 start_row,
2057 text_size.width,
2058 scroll_width,
2059 em_width,
2060 &line_layouts,
2061 cx,
2062 )
2063 } else {
2064 false
2065 };
2066
2067 if clamped || autoscrolled {
2068 snapshot = editor.snapshot(cx);
2069 }
2070
2071 let mut context_menu = None;
2072 let mut code_actions_indicator = None;
2073 if let Some(newest_selection_head) = newest_selection_head {
2074 if (start_row..end_row).contains(&newest_selection_head.row()) {
2075 if editor.context_menu_visible() {
2076 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2077 context_menu =
2078 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2079 }
2080
2081 let active = matches!(
2082 editor.context_menu.read().as_ref(),
2083 Some(crate::ContextMenu::CodeActions(_))
2084 );
2085
2086 code_actions_indicator = editor
2087 .render_code_actions_indicator(&style, active, cx)
2088 .map(|element| CodeActionsIndicator {
2089 row: newest_selection_head.row(),
2090 button: element,
2091 });
2092 }
2093 }
2094
2095 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2096 let max_size = size(
2097 (120. * em_width) // Default size
2098 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2099 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2100 (16. * line_height) // Default size
2101 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2102 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2103 );
2104
2105 let mut hover = editor.hover_state.render(
2106 &snapshot,
2107 &style,
2108 visible_rows,
2109 max_size,
2110 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2111 cx,
2112 );
2113
2114 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2115 editor.render_fold_indicators(
2116 fold_statuses,
2117 &style,
2118 editor.gutter_hovered,
2119 line_height,
2120 gutter_margin,
2121 cx,
2122 )
2123 });
2124
2125 let invisible_symbol_font_size = font_size / 2.;
2126 let tab_invisible = cx
2127 .text_system()
2128 .shape_line(
2129 "→".into(),
2130 invisible_symbol_font_size,
2131 &[TextRun {
2132 len: "→".len(),
2133 font: self.style.text.font(),
2134 color: cx.theme().colors().editor_invisible,
2135 background_color: None,
2136 underline: None,
2137 }],
2138 )
2139 .unwrap();
2140 let space_invisible = cx
2141 .text_system()
2142 .shape_line(
2143 "•".into(),
2144 invisible_symbol_font_size,
2145 &[TextRun {
2146 len: "•".len(),
2147 font: self.style.text.font(),
2148 color: cx.theme().colors().editor_invisible,
2149 background_color: None,
2150 underline: None,
2151 }],
2152 )
2153 .unwrap();
2154
2155 LayoutState {
2156 mode: snapshot.mode,
2157 position_map: Arc::new(PositionMap {
2158 size: bounds.size,
2159 scroll_position: point(
2160 scroll_position.x * em_width,
2161 scroll_position.y * line_height,
2162 ),
2163 scroll_max,
2164 line_layouts,
2165 line_height,
2166 em_width,
2167 em_advance,
2168 snapshot,
2169 }),
2170 visible_anchor_range: start_anchor..end_anchor,
2171 visible_display_row_range: start_row..end_row,
2172 wrap_guides,
2173 gutter_size,
2174 gutter_padding,
2175 text_size,
2176 scrollbar_row_range,
2177 show_scrollbars,
2178 is_singleton,
2179 max_row,
2180 gutter_margin,
2181 active_rows,
2182 highlighted_rows,
2183 highlighted_ranges,
2184 line_numbers,
2185 display_hunks,
2186 blocks,
2187 selections,
2188 context_menu,
2189 code_actions_indicator,
2190 fold_indicators,
2191 tab_invisible,
2192 space_invisible,
2193 hover_popovers: hover,
2194 }
2195 })
2196 }
2197
2198 #[allow(clippy::too_many_arguments)]
2199 fn layout_blocks(
2200 &self,
2201 rows: Range<u32>,
2202 snapshot: &EditorSnapshot,
2203 editor_width: Pixels,
2204 scroll_width: Pixels,
2205 gutter_padding: Pixels,
2206 gutter_width: Pixels,
2207 em_width: Pixels,
2208 text_x: Pixels,
2209 line_height: Pixels,
2210 style: &EditorStyle,
2211 line_layouts: &[LineWithInvisibles],
2212 editor: &mut Editor,
2213 cx: &mut ViewContext<Editor>,
2214 ) -> (Pixels, Vec<BlockLayout>) {
2215 let mut block_id = 0;
2216 let scroll_x = snapshot.scroll_anchor.offset.x;
2217 let (fixed_blocks, non_fixed_blocks) = snapshot
2218 .blocks_in_range(rows.clone())
2219 .partition::<Vec<_>, _>(|(_, block)| match block {
2220 TransformBlock::ExcerptHeader { .. } => false,
2221 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2222 });
2223
2224 let mut render_block = |block: &TransformBlock,
2225 available_space: Size<AvailableSpace>,
2226 block_id: usize,
2227 editor: &mut Editor,
2228 cx: &mut ViewContext<Editor>| {
2229 let mut element = match block {
2230 TransformBlock::Custom(block) => {
2231 let align_to = block
2232 .position()
2233 .to_point(&snapshot.buffer_snapshot)
2234 .to_display_point(snapshot);
2235 let anchor_x = text_x
2236 + if rows.contains(&align_to.row()) {
2237 line_layouts[(align_to.row() - rows.start) as usize]
2238 .line
2239 .x_for_index(align_to.column() as usize)
2240 } else {
2241 layout_line(align_to.row(), snapshot, style, cx)
2242 .unwrap()
2243 .x_for_index(align_to.column() as usize)
2244 };
2245
2246 block.render(&mut BlockContext {
2247 view_context: cx,
2248 anchor_x,
2249 gutter_padding,
2250 line_height,
2251 gutter_width,
2252 em_width,
2253 block_id,
2254 editor_style: &self.style,
2255 })
2256 }
2257
2258 TransformBlock::ExcerptHeader {
2259 buffer,
2260 range,
2261 starts_new_buffer,
2262 ..
2263 } => {
2264 let include_root = editor
2265 .project
2266 .as_ref()
2267 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2268 .unwrap_or_default();
2269
2270 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2271 let jump_path = ProjectPath {
2272 worktree_id: file.worktree_id(cx),
2273 path: file.path.clone(),
2274 };
2275 let jump_anchor = range
2276 .primary
2277 .as_ref()
2278 .map_or(range.context.start, |primary| primary.start);
2279 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2280
2281 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2282 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2283 });
2284
2285 jump_handler
2286 });
2287
2288 let element = if *starts_new_buffer {
2289 let path = buffer.resolve_file_path(cx, include_root);
2290 let mut filename = None;
2291 let mut parent_path = None;
2292 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2293 if let Some(path) = path {
2294 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2295 parent_path = path
2296 .parent()
2297 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2298 }
2299
2300 let is_open = true;
2301
2302 div().id("path header container").size_full().p_1p5().child(
2303 h_stack()
2304 .id("path header block")
2305 .py_1p5()
2306 .pl_3()
2307 .pr_2()
2308 .rounded_lg()
2309 .shadow_md()
2310 .border()
2311 .border_color(cx.theme().colors().border)
2312 .bg(cx.theme().colors().editor_subheader_background)
2313 .justify_between()
2314 .cursor_pointer()
2315 .hover(|style| style.bg(cx.theme().colors().element_hover))
2316 .on_click(cx.listener(|_editor, _event, _cx| {
2317 // TODO: Implement collapsing path headers
2318 todo!("Clicking path header")
2319 }))
2320 .child(
2321 h_stack()
2322 .gap_3()
2323 // TODO: Add open/close state and toggle action
2324 .child(
2325 div().border().border_color(gpui::red()).child(
2326 ButtonLike::new("path-header-disclosure-control")
2327 .style(ButtonStyle::Subtle)
2328 .child(IconElement::new(match is_open {
2329 true => Icon::ChevronDown,
2330 false => Icon::ChevronRight,
2331 })),
2332 ),
2333 )
2334 .child(
2335 h_stack()
2336 .gap_2()
2337 .child(Label::new(
2338 filename
2339 .map(SharedString::from)
2340 .unwrap_or_else(|| "untitled".into()),
2341 ))
2342 .when_some(parent_path, |then, path| {
2343 then.child(Label::new(path).color(Color::Muted))
2344 }),
2345 ),
2346 )
2347 .children(jump_handler.map(|jump_handler| {
2348 IconButton::new(block_id, Icon::ArrowUpRight)
2349 .style(ButtonStyle::Subtle)
2350 .on_click(jump_handler)
2351 .tooltip(|cx| {
2352 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2353 })
2354 })), // .p_x(gutter_padding)
2355 )
2356 } else {
2357 let text_style = style.text.clone();
2358 h_stack()
2359 .id("collapsed context")
2360 .size_full()
2361 .gap(gutter_padding)
2362 .child(
2363 h_stack()
2364 .justify_end()
2365 .flex_none()
2366 .w(gutter_width - gutter_padding)
2367 .h_full()
2368 .text_buffer(cx)
2369 .text_color(cx.theme().colors().editor_line_number)
2370 .child("..."),
2371 )
2372 .map(|this| {
2373 if let Some(jump_handler) = jump_handler {
2374 this.child(
2375 ButtonLike::new("jump to collapsed context")
2376 .style(ButtonStyle::Transparent)
2377 .full_width()
2378 .on_click(jump_handler)
2379 .tooltip(|cx| {
2380 Tooltip::for_action(
2381 "Jump to Buffer",
2382 &OpenExcerpts,
2383 cx,
2384 )
2385 })
2386 .child(
2387 div()
2388 .h_px()
2389 .w_full()
2390 .bg(cx.theme().colors().border_variant)
2391 .group_hover("", |style| {
2392 style.bg(cx.theme().colors().border)
2393 }),
2394 ),
2395 )
2396 } else {
2397 this.child(div().size_full().bg(gpui::green()))
2398 }
2399 })
2400 // .child("⋯")
2401 // .children(jump_icon) // .p_x(gutter_padding)
2402 };
2403 element.into_any()
2404 }
2405 };
2406
2407 let size = element.measure(available_space, cx);
2408 (element, size)
2409 };
2410
2411 let mut fixed_block_max_width = Pixels::ZERO;
2412 let mut blocks = Vec::new();
2413 for (row, block) in fixed_blocks {
2414 let available_space = size(
2415 AvailableSpace::MinContent,
2416 AvailableSpace::Definite(block.height() as f32 * line_height),
2417 );
2418 let (element, element_size) =
2419 render_block(block, available_space, block_id, editor, cx);
2420 block_id += 1;
2421 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2422 blocks.push(BlockLayout {
2423 row,
2424 element,
2425 available_space,
2426 style: BlockStyle::Fixed,
2427 });
2428 }
2429 for (row, block) in non_fixed_blocks {
2430 let style = match block {
2431 TransformBlock::Custom(block) => block.style(),
2432 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2433 };
2434 let width = match style {
2435 BlockStyle::Sticky => editor_width,
2436 BlockStyle::Flex => editor_width
2437 .max(fixed_block_max_width)
2438 .max(gutter_width + scroll_width),
2439 BlockStyle::Fixed => unreachable!(),
2440 };
2441 let available_space = size(
2442 AvailableSpace::Definite(width),
2443 AvailableSpace::Definite(block.height() as f32 * line_height),
2444 );
2445 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2446 block_id += 1;
2447 blocks.push(BlockLayout {
2448 row,
2449 element,
2450 available_space,
2451 style,
2452 });
2453 }
2454 (
2455 scroll_width.max(fixed_block_max_width - gutter_width),
2456 blocks,
2457 )
2458 }
2459
2460 fn paint_mouse_listeners(
2461 &mut self,
2462 bounds: Bounds<Pixels>,
2463 gutter_bounds: Bounds<Pixels>,
2464 text_bounds: Bounds<Pixels>,
2465 layout: &LayoutState,
2466 cx: &mut WindowContext,
2467 ) {
2468 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2469 let interactive_bounds = InteractiveBounds {
2470 bounds: bounds.intersect(&cx.content_mask().bounds),
2471 stacking_order: cx.stacking_order().clone(),
2472 };
2473
2474 cx.on_mouse_event({
2475 let position_map = layout.position_map.clone();
2476 let editor = self.editor.clone();
2477 let interactive_bounds = interactive_bounds.clone();
2478
2479 move |event: &ScrollWheelEvent, phase, cx| {
2480 if phase != DispatchPhase::Bubble {
2481 return;
2482 }
2483
2484 editor.update(cx, |editor, cx| {
2485 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2486 });
2487 }
2488 });
2489
2490 cx.on_mouse_event({
2491 let position_map = layout.position_map.clone();
2492 let editor = self.editor.clone();
2493 let stacking_order = cx.stacking_order().clone();
2494
2495 move |event: &MouseDownEvent, phase, cx| {
2496 if phase != DispatchPhase::Bubble {
2497 return;
2498 }
2499
2500 match event.button {
2501 MouseButton::Left => editor.update(cx, |editor, cx| {
2502 Self::mouse_left_down(
2503 editor,
2504 event,
2505 &position_map,
2506 text_bounds,
2507 gutter_bounds,
2508 &stacking_order,
2509 cx,
2510 );
2511 }),
2512 MouseButton::Right => editor.update(cx, |editor, cx| {
2513 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2514 }),
2515 _ => {}
2516 };
2517 }
2518 });
2519
2520 cx.on_mouse_event({
2521 let position_map = layout.position_map.clone();
2522 let editor = self.editor.clone();
2523 let stacking_order = cx.stacking_order().clone();
2524
2525 move |event: &MouseUpEvent, phase, cx| {
2526 editor.update(cx, |editor, cx| {
2527 Self::mouse_up(
2528 editor,
2529 event,
2530 &position_map,
2531 text_bounds,
2532 &stacking_order,
2533 cx,
2534 )
2535 });
2536 }
2537 });
2538 cx.on_mouse_event({
2539 let position_map = layout.position_map.clone();
2540 let editor = self.editor.clone();
2541 let stacking_order = cx.stacking_order().clone();
2542
2543 move |event: &MouseMoveEvent, phase, cx| {
2544 if phase != DispatchPhase::Bubble {
2545 return;
2546 }
2547
2548 editor.update(cx, |editor, cx| {
2549 Self::mouse_moved(
2550 editor,
2551 event,
2552 &position_map,
2553 text_bounds,
2554 gutter_bounds,
2555 &stacking_order,
2556 cx,
2557 )
2558 });
2559 }
2560 });
2561 }
2562}
2563
2564#[derive(Debug)]
2565pub struct LineWithInvisibles {
2566 pub line: ShapedLine,
2567 invisibles: Vec<Invisible>,
2568}
2569
2570impl LineWithInvisibles {
2571 fn from_chunks<'a>(
2572 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2573 text_style: &TextStyle,
2574 max_line_len: usize,
2575 max_line_count: usize,
2576 line_number_layouts: &[Option<ShapedLine>],
2577 editor_mode: EditorMode,
2578 cx: &WindowContext,
2579 ) -> Vec<Self> {
2580 let mut layouts = Vec::with_capacity(max_line_count);
2581 let mut line = String::new();
2582 let mut invisibles = Vec::new();
2583 let mut styles = Vec::new();
2584 let mut non_whitespace_added = false;
2585 let mut row = 0;
2586 let mut line_exceeded_max_len = false;
2587 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2588
2589 for highlighted_chunk in chunks.chain([HighlightedChunk {
2590 chunk: "\n",
2591 style: None,
2592 is_tab: false,
2593 }]) {
2594 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2595 if ix > 0 {
2596 let shaped_line = cx
2597 .text_system()
2598 .shape_line(line.clone().into(), font_size, &styles)
2599 .unwrap();
2600 layouts.push(Self {
2601 line: shaped_line,
2602 invisibles: invisibles.drain(..).collect(),
2603 });
2604
2605 line.clear();
2606 styles.clear();
2607 row += 1;
2608 line_exceeded_max_len = false;
2609 non_whitespace_added = false;
2610 if row == max_line_count {
2611 return layouts;
2612 }
2613 }
2614
2615 if !line_chunk.is_empty() && !line_exceeded_max_len {
2616 let text_style = if let Some(style) = highlighted_chunk.style {
2617 Cow::Owned(text_style.clone().highlight(style))
2618 } else {
2619 Cow::Borrowed(text_style)
2620 };
2621
2622 if line.len() + line_chunk.len() > max_line_len {
2623 let mut chunk_len = max_line_len - line.len();
2624 while !line_chunk.is_char_boundary(chunk_len) {
2625 chunk_len -= 1;
2626 }
2627 line_chunk = &line_chunk[..chunk_len];
2628 line_exceeded_max_len = true;
2629 }
2630
2631 styles.push(TextRun {
2632 len: line_chunk.len(),
2633 font: text_style.font(),
2634 color: text_style.color,
2635 background_color: text_style.background_color,
2636 underline: text_style.underline,
2637 });
2638
2639 if editor_mode == EditorMode::Full {
2640 // Line wrap pads its contents with fake whitespaces,
2641 // avoid printing them
2642 let inside_wrapped_string = line_number_layouts
2643 .get(row)
2644 .and_then(|layout| layout.as_ref())
2645 .is_none();
2646 if highlighted_chunk.is_tab {
2647 if non_whitespace_added || !inside_wrapped_string {
2648 invisibles.push(Invisible::Tab {
2649 line_start_offset: line.len(),
2650 });
2651 }
2652 } else {
2653 invisibles.extend(
2654 line_chunk
2655 .chars()
2656 .enumerate()
2657 .filter(|(_, line_char)| {
2658 let is_whitespace = line_char.is_whitespace();
2659 non_whitespace_added |= !is_whitespace;
2660 is_whitespace
2661 && (non_whitespace_added || !inside_wrapped_string)
2662 })
2663 .map(|(whitespace_index, _)| Invisible::Whitespace {
2664 line_offset: line.len() + whitespace_index,
2665 }),
2666 )
2667 }
2668 }
2669
2670 line.push_str(line_chunk);
2671 }
2672 }
2673 }
2674
2675 layouts
2676 }
2677
2678 fn draw(
2679 &self,
2680 layout: &LayoutState,
2681 row: u32,
2682 content_origin: gpui::Point<Pixels>,
2683 whitespace_setting: ShowWhitespaceSetting,
2684 selection_ranges: &[Range<DisplayPoint>],
2685 cx: &mut WindowContext,
2686 ) {
2687 let line_height = layout.position_map.line_height;
2688 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2689
2690 self.line.paint(
2691 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2692 line_height,
2693 cx,
2694 );
2695
2696 self.draw_invisibles(
2697 &selection_ranges,
2698 layout,
2699 content_origin,
2700 line_y,
2701 row,
2702 line_height,
2703 whitespace_setting,
2704 cx,
2705 );
2706 }
2707
2708 fn draw_invisibles(
2709 &self,
2710 selection_ranges: &[Range<DisplayPoint>],
2711 layout: &LayoutState,
2712 content_origin: gpui::Point<Pixels>,
2713 line_y: Pixels,
2714 row: u32,
2715 line_height: Pixels,
2716 whitespace_setting: ShowWhitespaceSetting,
2717 cx: &mut WindowContext,
2718 ) {
2719 let allowed_invisibles_regions = match whitespace_setting {
2720 ShowWhitespaceSetting::None => return,
2721 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2722 ShowWhitespaceSetting::All => None,
2723 };
2724
2725 for invisible in &self.invisibles {
2726 let (&token_offset, invisible_symbol) = match invisible {
2727 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2728 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2729 };
2730
2731 let x_offset = self.line.x_for_index(token_offset);
2732 let invisible_offset =
2733 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2734 let origin = content_origin
2735 + gpui::point(
2736 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2737 line_y,
2738 );
2739
2740 if let Some(allowed_regions) = allowed_invisibles_regions {
2741 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2742 if !allowed_regions
2743 .iter()
2744 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2745 {
2746 continue;
2747 }
2748 }
2749 invisible_symbol.paint(origin, line_height, cx);
2750 }
2751 }
2752}
2753
2754#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2755enum Invisible {
2756 Tab { line_start_offset: usize },
2757 Whitespace { line_offset: usize },
2758}
2759
2760impl Element for EditorElement {
2761 type State = ();
2762
2763 fn layout(
2764 &mut self,
2765 element_state: Option<Self::State>,
2766 cx: &mut gpui::WindowContext,
2767 ) -> (gpui::LayoutId, Self::State) {
2768 self.editor.update(cx, |editor, cx| {
2769 editor.set_style(self.style.clone(), cx);
2770
2771 let layout_id = match editor.mode {
2772 EditorMode::SingleLine => {
2773 let rem_size = cx.rem_size();
2774 let mut style = Style::default();
2775 style.size.width = relative(1.).into();
2776 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2777 cx.request_layout(&style, None)
2778 }
2779 EditorMode::AutoHeight { max_lines } => {
2780 let editor_handle = cx.view().clone();
2781 let max_line_number_width =
2782 self.max_line_number_width(&editor.snapshot(cx), cx);
2783 cx.request_measured_layout(
2784 Style::default(),
2785 move |known_dimensions, available_space, cx| {
2786 editor_handle
2787 .update(cx, |editor, cx| {
2788 compute_auto_height_layout(
2789 editor,
2790 max_lines,
2791 max_line_number_width,
2792 known_dimensions,
2793 cx,
2794 )
2795 })
2796 .unwrap_or_default()
2797 },
2798 )
2799 }
2800 EditorMode::Full => {
2801 let mut style = Style::default();
2802 style.size.width = relative(1.).into();
2803 style.size.height = relative(1.).into();
2804 cx.request_layout(&style, None)
2805 }
2806 };
2807
2808 (layout_id, ())
2809 })
2810 }
2811
2812 fn paint(
2813 mut self,
2814 bounds: Bounds<gpui::Pixels>,
2815 element_state: &mut Self::State,
2816 cx: &mut gpui::WindowContext,
2817 ) {
2818 let editor = self.editor.clone();
2819
2820 let mut layout = self.compute_layout(bounds, cx);
2821 let gutter_bounds = Bounds {
2822 origin: bounds.origin,
2823 size: layout.gutter_size,
2824 };
2825 let text_bounds = Bounds {
2826 origin: gutter_bounds.upper_right(),
2827 size: layout.text_size,
2828 };
2829
2830 let focus_handle = editor.focus_handle(cx);
2831 let key_context = self.editor.read(cx).key_context(cx);
2832 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2833 self.register_actions(cx);
2834 self.register_key_listeners(cx);
2835
2836 // We call with_z_index to establish a new stacking context.
2837 cx.with_z_index(0, |cx| {
2838 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2839 // Paint mouse listeners at z-index 0 so any elements we paint on top of the editor
2840 // take precedence.
2841 cx.with_z_index(0, |cx| {
2842 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2843 });
2844 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2845 cx.handle_input(&focus_handle, input_handler);
2846
2847 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2848 if layout.gutter_size.width > Pixels::ZERO {
2849 self.paint_gutter(gutter_bounds, &mut layout, cx);
2850 }
2851 self.paint_text(text_bounds, &mut layout, cx);
2852
2853 if !layout.blocks.is_empty() {
2854 cx.with_z_index(1, |cx| {
2855 cx.with_element_id(Some("editor_blocks"), |cx| {
2856 self.paint_blocks(bounds, &mut layout, cx);
2857 });
2858 })
2859 }
2860
2861 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2862 });
2863 });
2864 })
2865 }
2866}
2867
2868impl IntoElement for EditorElement {
2869 type Element = Self;
2870
2871 fn element_id(&self) -> Option<gpui::ElementId> {
2872 self.editor.element_id()
2873 }
2874
2875 fn into_element(self) -> Self::Element {
2876 self
2877 }
2878}
2879
2880type BufferRow = u32;
2881
2882pub struct LayoutState {
2883 position_map: Arc<PositionMap>,
2884 gutter_size: Size<Pixels>,
2885 gutter_padding: Pixels,
2886 gutter_margin: Pixels,
2887 text_size: gpui::Size<Pixels>,
2888 mode: EditorMode,
2889 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2890 visible_anchor_range: Range<Anchor>,
2891 visible_display_row_range: Range<u32>,
2892 active_rows: BTreeMap<u32, bool>,
2893 highlighted_rows: Option<Range<u32>>,
2894 line_numbers: Vec<Option<ShapedLine>>,
2895 display_hunks: Vec<DisplayDiffHunk>,
2896 blocks: Vec<BlockLayout>,
2897 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2898 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2899 scrollbar_row_range: Range<f32>,
2900 show_scrollbars: bool,
2901 is_singleton: bool,
2902 max_row: u32,
2903 context_menu: Option<(DisplayPoint, AnyElement)>,
2904 code_actions_indicator: Option<CodeActionsIndicator>,
2905 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2906 fold_indicators: Vec<Option<IconButton>>,
2907 tab_invisible: ShapedLine,
2908 space_invisible: ShapedLine,
2909}
2910
2911struct CodeActionsIndicator {
2912 row: u32,
2913 button: IconButton,
2914}
2915
2916struct PositionMap {
2917 size: Size<Pixels>,
2918 line_height: Pixels,
2919 scroll_position: gpui::Point<Pixels>,
2920 scroll_max: gpui::Point<f32>,
2921 em_width: Pixels,
2922 em_advance: Pixels,
2923 line_layouts: Vec<LineWithInvisibles>,
2924 snapshot: EditorSnapshot,
2925}
2926
2927#[derive(Debug, Copy, Clone)]
2928pub struct PointForPosition {
2929 pub previous_valid: DisplayPoint,
2930 pub next_valid: DisplayPoint,
2931 pub exact_unclipped: DisplayPoint,
2932 pub column_overshoot_after_line_end: u32,
2933}
2934
2935impl PointForPosition {
2936 #[cfg(test)]
2937 pub fn valid(valid: DisplayPoint) -> Self {
2938 Self {
2939 previous_valid: valid,
2940 next_valid: valid,
2941 exact_unclipped: valid,
2942 column_overshoot_after_line_end: 0,
2943 }
2944 }
2945
2946 pub fn as_valid(&self) -> Option<DisplayPoint> {
2947 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2948 Some(self.previous_valid)
2949 } else {
2950 None
2951 }
2952 }
2953}
2954
2955impl PositionMap {
2956 fn point_for_position(
2957 &self,
2958 text_bounds: Bounds<Pixels>,
2959 position: gpui::Point<Pixels>,
2960 ) -> PointForPosition {
2961 let scroll_position = self.snapshot.scroll_position();
2962 let position = position - text_bounds.origin;
2963 let y = position.y.max(px(0.)).min(self.size.height);
2964 let x = position.x + (scroll_position.x * self.em_width);
2965 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2966
2967 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2968 .line_layouts
2969 .get(row as usize - scroll_position.y as usize)
2970 .map(|&LineWithInvisibles { ref line, .. }| line)
2971 {
2972 if let Some(ix) = line.index_for_x(x) {
2973 (ix as u32, px(0.))
2974 } else {
2975 (line.len as u32, px(0.).max(x - line.width))
2976 }
2977 } else {
2978 (0, x)
2979 };
2980
2981 let mut exact_unclipped = DisplayPoint::new(row, column);
2982 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2983 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2984
2985 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2986 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2987 PointForPosition {
2988 previous_valid,
2989 next_valid,
2990 exact_unclipped,
2991 column_overshoot_after_line_end,
2992 }
2993 }
2994}
2995
2996struct BlockLayout {
2997 row: u32,
2998 element: AnyElement,
2999 available_space: Size<AvailableSpace>,
3000 style: BlockStyle,
3001}
3002
3003fn layout_line(
3004 row: u32,
3005 snapshot: &EditorSnapshot,
3006 style: &EditorStyle,
3007 cx: &WindowContext,
3008) -> Result<ShapedLine> {
3009 let mut line = snapshot.line(row);
3010
3011 if line.len() > MAX_LINE_LEN {
3012 let mut len = MAX_LINE_LEN;
3013 while !line.is_char_boundary(len) {
3014 len -= 1;
3015 }
3016
3017 line.truncate(len);
3018 }
3019
3020 cx.text_system().shape_line(
3021 line.into(),
3022 style.text.font_size.to_pixels(cx.rem_size()),
3023 &[TextRun {
3024 len: snapshot.line_len(row) as usize,
3025 font: style.text.font(),
3026 color: Hsla::default(),
3027 background_color: None,
3028 underline: None,
3029 }],
3030 )
3031}
3032
3033#[derive(Debug)]
3034pub struct Cursor {
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}
3042
3043impl Cursor {
3044 pub fn new(
3045 origin: gpui::Point<Pixels>,
3046 block_width: Pixels,
3047 line_height: Pixels,
3048 color: Hsla,
3049 shape: CursorShape,
3050 block_text: Option<ShapedLine>,
3051 ) -> Cursor {
3052 Cursor {
3053 origin,
3054 block_width,
3055 line_height,
3056 color,
3057 shape,
3058 block_text,
3059 }
3060 }
3061
3062 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3063 Bounds {
3064 origin: self.origin + origin,
3065 size: size(self.block_width, self.line_height),
3066 }
3067 }
3068
3069 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3070 let bounds = match self.shape {
3071 CursorShape::Bar => Bounds {
3072 origin: self.origin + origin,
3073 size: size(px(2.0), self.line_height),
3074 },
3075 CursorShape::Block | CursorShape::Hollow => Bounds {
3076 origin: self.origin + origin,
3077 size: size(self.block_width, self.line_height),
3078 },
3079 CursorShape::Underscore => Bounds {
3080 origin: self.origin
3081 + origin
3082 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3083 size: size(self.block_width, px(2.0)),
3084 },
3085 };
3086
3087 //Draw background or border quad
3088 if matches!(self.shape, CursorShape::Hollow) {
3089 cx.paint_quad(
3090 bounds,
3091 Corners::default(),
3092 transparent_black(),
3093 Edges::all(px(1.)),
3094 self.color,
3095 );
3096 } else {
3097 cx.paint_quad(
3098 bounds,
3099 Corners::default(),
3100 self.color,
3101 Edges::default(),
3102 transparent_black(),
3103 );
3104 }
3105
3106 if let Some(block_text) = &self.block_text {
3107 block_text.paint(self.origin + origin, self.line_height, cx);
3108 }
3109 }
3110
3111 pub fn shape(&self) -> CursorShape {
3112 self.shape
3113 }
3114}
3115
3116#[derive(Debug)]
3117pub struct HighlightedRange {
3118 pub start_y: Pixels,
3119 pub line_height: Pixels,
3120 pub lines: Vec<HighlightedRangeLine>,
3121 pub color: Hsla,
3122 pub corner_radius: Pixels,
3123}
3124
3125#[derive(Debug)]
3126pub struct HighlightedRangeLine {
3127 pub start_x: Pixels,
3128 pub end_x: Pixels,
3129}
3130
3131impl HighlightedRange {
3132 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3133 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3134 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3135 self.paint_lines(
3136 self.start_y + self.line_height,
3137 &self.lines[1..],
3138 bounds,
3139 cx,
3140 );
3141 } else {
3142 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3143 }
3144 }
3145
3146 fn paint_lines(
3147 &self,
3148 start_y: Pixels,
3149 lines: &[HighlightedRangeLine],
3150 bounds: Bounds<Pixels>,
3151 cx: &mut WindowContext,
3152 ) {
3153 if lines.is_empty() {
3154 return;
3155 }
3156
3157 let first_line = lines.first().unwrap();
3158 let last_line = lines.last().unwrap();
3159
3160 let first_top_left = point(first_line.start_x, start_y);
3161 let first_top_right = point(first_line.end_x, start_y);
3162
3163 let curve_height = point(Pixels::ZERO, self.corner_radius);
3164 let curve_width = |start_x: Pixels, end_x: Pixels| {
3165 let max = (end_x - start_x) / 2.;
3166 let width = if max < self.corner_radius {
3167 max
3168 } else {
3169 self.corner_radius
3170 };
3171
3172 point(width, Pixels::ZERO)
3173 };
3174
3175 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3176 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3177 path.curve_to(first_top_right + curve_height, first_top_right);
3178
3179 let mut iter = lines.iter().enumerate().peekable();
3180 while let Some((ix, line)) = iter.next() {
3181 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3182
3183 if let Some((_, next_line)) = iter.peek() {
3184 let next_top_right = point(next_line.end_x, bottom_right.y);
3185
3186 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3187 Ordering::Equal => {
3188 path.line_to(bottom_right);
3189 }
3190 Ordering::Less => {
3191 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3192 path.line_to(bottom_right - curve_height);
3193 if self.corner_radius > Pixels::ZERO {
3194 path.curve_to(bottom_right - curve_width, bottom_right);
3195 }
3196 path.line_to(next_top_right + curve_width);
3197 if self.corner_radius > Pixels::ZERO {
3198 path.curve_to(next_top_right + curve_height, next_top_right);
3199 }
3200 }
3201 Ordering::Greater => {
3202 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3203 path.line_to(bottom_right - curve_height);
3204 if self.corner_radius > Pixels::ZERO {
3205 path.curve_to(bottom_right + curve_width, bottom_right);
3206 }
3207 path.line_to(next_top_right - curve_width);
3208 if self.corner_radius > Pixels::ZERO {
3209 path.curve_to(next_top_right + curve_height, next_top_right);
3210 }
3211 }
3212 }
3213 } else {
3214 let curve_width = curve_width(line.start_x, line.end_x);
3215 path.line_to(bottom_right - curve_height);
3216 if self.corner_radius > Pixels::ZERO {
3217 path.curve_to(bottom_right - curve_width, bottom_right);
3218 }
3219
3220 let bottom_left = point(line.start_x, bottom_right.y);
3221 path.line_to(bottom_left + curve_width);
3222 if self.corner_radius > Pixels::ZERO {
3223 path.curve_to(bottom_left - curve_height, bottom_left);
3224 }
3225 }
3226 }
3227
3228 if first_line.start_x > last_line.start_x {
3229 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3230 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3231 path.line_to(second_top_left + curve_height);
3232 if self.corner_radius > Pixels::ZERO {
3233 path.curve_to(second_top_left + curve_width, second_top_left);
3234 }
3235 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3236 path.line_to(first_bottom_left - curve_width);
3237 if self.corner_radius > Pixels::ZERO {
3238 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3239 }
3240 }
3241
3242 path.line_to(first_top_left + curve_height);
3243 if self.corner_radius > Pixels::ZERO {
3244 path.curve_to(first_top_left + top_curve_width, first_top_left);
3245 }
3246 path.line_to(first_top_right - top_curve_width);
3247
3248 cx.paint_path(path, self.color);
3249 }
3250}
3251
3252pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3253 (delta.pow(1.5) / 100.0).into()
3254}
3255
3256fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3257 (delta.pow(1.2) / 300.0).into()
3258}
3259
3260#[cfg(test)]
3261mod tests {
3262 use super::*;
3263 use crate::{
3264 display_map::{BlockDisposition, BlockProperties},
3265 editor_tests::{init_test, update_test_language_settings},
3266 Editor, MultiBuffer,
3267 };
3268 use gpui::{EmptyView, TestAppContext};
3269 use language::language_settings;
3270 use log::info;
3271 use std::{num::NonZeroU32, sync::Arc};
3272 use util::test::sample_text;
3273
3274 #[gpui::test]
3275 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3276 init_test(cx, |_| {});
3277 let window = cx.add_window(|cx| {
3278 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3279 Editor::new(EditorMode::Full, buffer, None, cx)
3280 });
3281
3282 let editor = window.root(cx).unwrap();
3283 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3284 let element = EditorElement::new(&editor, style);
3285
3286 let layouts = window
3287 .update(cx, |editor, cx| {
3288 let snapshot = editor.snapshot(cx);
3289 element
3290 .shape_line_numbers(
3291 0..6,
3292 &Default::default(),
3293 DisplayPoint::new(0, 0),
3294 false,
3295 &snapshot,
3296 cx,
3297 )
3298 .0
3299 })
3300 .unwrap();
3301 assert_eq!(layouts.len(), 6);
3302
3303 let relative_rows = window
3304 .update(cx, |editor, cx| {
3305 let snapshot = editor.snapshot(cx);
3306 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3307 })
3308 .unwrap();
3309 assert_eq!(relative_rows[&0], 3);
3310 assert_eq!(relative_rows[&1], 2);
3311 assert_eq!(relative_rows[&2], 1);
3312 // current line has no relative number
3313 assert_eq!(relative_rows[&4], 1);
3314 assert_eq!(relative_rows[&5], 2);
3315
3316 // works if cursor is before screen
3317 let relative_rows = window
3318 .update(cx, |editor, cx| {
3319 let snapshot = editor.snapshot(cx);
3320
3321 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3322 })
3323 .unwrap();
3324 assert_eq!(relative_rows.len(), 3);
3325 assert_eq!(relative_rows[&3], 2);
3326 assert_eq!(relative_rows[&4], 3);
3327 assert_eq!(relative_rows[&5], 4);
3328
3329 // works if cursor is after screen
3330 let relative_rows = window
3331 .update(cx, |editor, cx| {
3332 let snapshot = editor.snapshot(cx);
3333
3334 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3335 })
3336 .unwrap();
3337 assert_eq!(relative_rows.len(), 3);
3338 assert_eq!(relative_rows[&0], 5);
3339 assert_eq!(relative_rows[&1], 4);
3340 assert_eq!(relative_rows[&2], 3);
3341 }
3342
3343 #[gpui::test]
3344 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3345 init_test(cx, |_| {});
3346
3347 let window = cx.add_window(|cx| {
3348 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3349 Editor::new(EditorMode::Full, buffer, None, cx)
3350 });
3351 let editor = window.root(cx).unwrap();
3352 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3353 let mut element = EditorElement::new(&editor, style);
3354
3355 window
3356 .update(cx, |editor, cx| {
3357 editor.cursor_shape = CursorShape::Block;
3358 editor.change_selections(None, cx, |s| {
3359 s.select_ranges([
3360 Point::new(0, 0)..Point::new(1, 0),
3361 Point::new(3, 2)..Point::new(3, 3),
3362 Point::new(5, 6)..Point::new(6, 0),
3363 ]);
3364 });
3365 })
3366 .unwrap();
3367 let state = cx
3368 .update_window(window.into(), |_, cx| {
3369 element.compute_layout(
3370 Bounds {
3371 origin: point(px(500.), px(500.)),
3372 size: size(px(500.), px(500.)),
3373 },
3374 cx,
3375 )
3376 })
3377 .unwrap();
3378
3379 assert_eq!(state.selections.len(), 1);
3380 let local_selections = &state.selections[0].1;
3381 assert_eq!(local_selections.len(), 3);
3382 // moves cursor back one line
3383 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3384 assert_eq!(
3385 local_selections[0].range,
3386 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3387 );
3388
3389 // moves cursor back one column
3390 assert_eq!(
3391 local_selections[1].range,
3392 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3393 );
3394 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3395
3396 // leaves cursor on the max point
3397 assert_eq!(
3398 local_selections[2].range,
3399 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3400 );
3401 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3402
3403 // active lines does not include 1 (even though the range of the selection does)
3404 assert_eq!(
3405 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3406 vec![0, 3, 5, 6]
3407 );
3408
3409 // multi-buffer support
3410 // in DisplayPoint co-ordinates, this is what we're dealing with:
3411 // 0: [[file
3412 // 1: header]]
3413 // 2: aaaaaa
3414 // 3: bbbbbb
3415 // 4: cccccc
3416 // 5:
3417 // 6: ...
3418 // 7: ffffff
3419 // 8: gggggg
3420 // 9: hhhhhh
3421 // 10:
3422 // 11: [[file
3423 // 12: header]]
3424 // 13: bbbbbb
3425 // 14: cccccc
3426 // 15: dddddd
3427 let window = cx.add_window(|cx| {
3428 let buffer = MultiBuffer::build_multi(
3429 [
3430 (
3431 &(sample_text(8, 6, 'a') + "\n"),
3432 vec![
3433 Point::new(0, 0)..Point::new(3, 0),
3434 Point::new(4, 0)..Point::new(7, 0),
3435 ],
3436 ),
3437 (
3438 &(sample_text(8, 6, 'a') + "\n"),
3439 vec![Point::new(1, 0)..Point::new(3, 0)],
3440 ),
3441 ],
3442 cx,
3443 );
3444 Editor::new(EditorMode::Full, buffer, None, cx)
3445 });
3446 let editor = window.root(cx).unwrap();
3447 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3448 let mut element = EditorElement::new(&editor, style);
3449 let state = window.update(cx, |editor, cx| {
3450 editor.cursor_shape = CursorShape::Block;
3451 editor.change_selections(None, cx, |s| {
3452 s.select_display_ranges([
3453 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3454 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3455 ]);
3456 });
3457 });
3458
3459 let state = cx
3460 .update_window(window.into(), |_, cx| {
3461 element.compute_layout(
3462 Bounds {
3463 origin: point(px(500.), px(500.)),
3464 size: size(px(500.), px(500.)),
3465 },
3466 cx,
3467 )
3468 })
3469 .unwrap();
3470 assert_eq!(state.selections.len(), 1);
3471 let local_selections = &state.selections[0].1;
3472 assert_eq!(local_selections.len(), 2);
3473
3474 // moves cursor on excerpt boundary back a line
3475 // and doesn't allow selection to bleed through
3476 assert_eq!(
3477 local_selections[0].range,
3478 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3479 );
3480 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3481 // moves cursor on buffer boundary back two lines
3482 // and doesn't allow selection to bleed through
3483 assert_eq!(
3484 local_selections[1].range,
3485 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3486 );
3487 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3488 }
3489
3490 #[gpui::test]
3491 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3492 init_test(cx, |_| {});
3493
3494 let window = cx.add_window(|cx| {
3495 let buffer = MultiBuffer::build_simple("", cx);
3496 Editor::new(EditorMode::Full, buffer, None, cx)
3497 });
3498 let editor = window.root(cx).unwrap();
3499 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3500 window
3501 .update(cx, |editor, cx| {
3502 editor.set_placeholder_text("hello", cx);
3503 editor.insert_blocks(
3504 [BlockProperties {
3505 style: BlockStyle::Fixed,
3506 disposition: BlockDisposition::Above,
3507 height: 3,
3508 position: Anchor::min(),
3509 render: Arc::new(|_| div().into_any()),
3510 }],
3511 None,
3512 cx,
3513 );
3514
3515 // Blur the editor so that it displays placeholder text.
3516 cx.blur();
3517 })
3518 .unwrap();
3519
3520 let mut element = EditorElement::new(&editor, style);
3521 let mut state = cx
3522 .update_window(window.into(), |_, cx| {
3523 element.compute_layout(
3524 Bounds {
3525 origin: point(px(500.), px(500.)),
3526 size: size(px(500.), px(500.)),
3527 },
3528 cx,
3529 )
3530 })
3531 .unwrap();
3532 let size = state.position_map.size;
3533
3534 assert_eq!(state.position_map.line_layouts.len(), 4);
3535 assert_eq!(
3536 state
3537 .line_numbers
3538 .iter()
3539 .map(Option::is_some)
3540 .collect::<Vec<_>>(),
3541 &[false, false, false, true]
3542 );
3543
3544 // Don't panic.
3545 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3546 cx.update_window(window.into(), |_, cx| {
3547 element.paint(bounds, &mut (), cx);
3548 })
3549 .unwrap()
3550 }
3551
3552 #[gpui::test]
3553 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3554 const TAB_SIZE: u32 = 4;
3555
3556 let input_text = "\t \t|\t| a b";
3557 let expected_invisibles = vec![
3558 Invisible::Tab {
3559 line_start_offset: 0,
3560 },
3561 Invisible::Whitespace {
3562 line_offset: TAB_SIZE as usize,
3563 },
3564 Invisible::Tab {
3565 line_start_offset: TAB_SIZE as usize + 1,
3566 },
3567 Invisible::Tab {
3568 line_start_offset: TAB_SIZE as usize * 2 + 1,
3569 },
3570 Invisible::Whitespace {
3571 line_offset: TAB_SIZE as usize * 3 + 1,
3572 },
3573 Invisible::Whitespace {
3574 line_offset: TAB_SIZE as usize * 3 + 3,
3575 },
3576 ];
3577 assert_eq!(
3578 expected_invisibles.len(),
3579 input_text
3580 .chars()
3581 .filter(|initial_char| initial_char.is_whitespace())
3582 .count(),
3583 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3584 );
3585
3586 init_test(cx, |s| {
3587 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3588 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3589 });
3590
3591 let actual_invisibles =
3592 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3593
3594 assert_eq!(expected_invisibles, actual_invisibles);
3595 }
3596
3597 #[gpui::test]
3598 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3599 init_test(cx, |s| {
3600 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3601 s.defaults.tab_size = NonZeroU32::new(4);
3602 });
3603
3604 for editor_mode_without_invisibles in [
3605 EditorMode::SingleLine,
3606 EditorMode::AutoHeight { max_lines: 100 },
3607 ] {
3608 let invisibles = collect_invisibles_from_new_editor(
3609 cx,
3610 editor_mode_without_invisibles,
3611 "\t\t\t| | a b",
3612 px(500.0),
3613 );
3614 assert!(invisibles.is_empty(),
3615 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3616 }
3617 }
3618
3619 #[gpui::test]
3620 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3621 let tab_size = 4;
3622 let input_text = "a\tbcd ".repeat(9);
3623 let repeated_invisibles = [
3624 Invisible::Tab {
3625 line_start_offset: 1,
3626 },
3627 Invisible::Whitespace {
3628 line_offset: tab_size as usize + 3,
3629 },
3630 Invisible::Whitespace {
3631 line_offset: tab_size as usize + 4,
3632 },
3633 Invisible::Whitespace {
3634 line_offset: tab_size as usize + 5,
3635 },
3636 ];
3637 let expected_invisibles = std::iter::once(repeated_invisibles)
3638 .cycle()
3639 .take(9)
3640 .flatten()
3641 .collect::<Vec<_>>();
3642 assert_eq!(
3643 expected_invisibles.len(),
3644 input_text
3645 .chars()
3646 .filter(|initial_char| initial_char.is_whitespace())
3647 .count(),
3648 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3649 );
3650 info!("Expected invisibles: {expected_invisibles:?}");
3651
3652 init_test(cx, |_| {});
3653
3654 // Put the same string with repeating whitespace pattern into editors of various size,
3655 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3656 let resize_step = 10.0;
3657 let mut editor_width = 200.0;
3658 while editor_width <= 1000.0 {
3659 update_test_language_settings(cx, |s| {
3660 s.defaults.tab_size = NonZeroU32::new(tab_size);
3661 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3662 s.defaults.preferred_line_length = Some(editor_width as u32);
3663 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3664 });
3665
3666 let actual_invisibles = collect_invisibles_from_new_editor(
3667 cx,
3668 EditorMode::Full,
3669 &input_text,
3670 px(editor_width),
3671 );
3672
3673 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3674 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3675 let mut i = 0;
3676 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3677 i = actual_index;
3678 match expected_invisibles.get(i) {
3679 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3680 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3681 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3682 _ => {
3683 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3684 }
3685 },
3686 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3687 }
3688 }
3689 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3690 assert!(
3691 missing_expected_invisibles.is_empty(),
3692 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3693 );
3694
3695 editor_width += resize_step;
3696 }
3697 }
3698
3699 fn collect_invisibles_from_new_editor(
3700 cx: &mut TestAppContext,
3701 editor_mode: EditorMode,
3702 input_text: &str,
3703 editor_width: Pixels,
3704 ) -> Vec<Invisible> {
3705 info!(
3706 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3707 editor_width.0
3708 );
3709 let window = cx.add_window(|cx| {
3710 let buffer = MultiBuffer::build_simple(&input_text, cx);
3711 Editor::new(editor_mode, buffer, None, cx)
3712 });
3713 let editor = window.root(cx).unwrap();
3714 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3715 let mut element = EditorElement::new(&editor, style);
3716 window
3717 .update(cx, |editor, cx| {
3718 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3719 editor.set_wrap_width(Some(editor_width), cx);
3720 })
3721 .unwrap();
3722 let layout_state = cx
3723 .update_window(window.into(), |_, cx| {
3724 element.compute_layout(
3725 Bounds {
3726 origin: point(px(500.), px(500.)),
3727 size: size(px(500.), px(500.)),
3728 },
3729 cx,
3730 )
3731 })
3732 .unwrap();
3733
3734 layout_state
3735 .position_map
3736 .line_layouts
3737 .iter()
3738 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3739 .flatten()
3740 .cloned()
3741 .collect()
3742 }
3743}
3744
3745pub fn register_action<T: Action>(
3746 view: &View<Editor>,
3747 cx: &mut WindowContext,
3748 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3749) {
3750 let view = view.clone();
3751 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3752 let action = action.downcast_ref().unwrap();
3753 if phase == DispatchPhase::Bubble {
3754 view.update(cx, |editor, cx| {
3755 listener(editor, action, cx);
3756 })
3757 }
3758 })
3759}
3760
3761fn compute_auto_height_layout(
3762 editor: &mut Editor,
3763 max_lines: usize,
3764 max_line_number_width: Pixels,
3765 known_dimensions: Size<Option<Pixels>>,
3766 cx: &mut ViewContext<Editor>,
3767) -> Option<Size<Pixels>> {
3768 let mut width = known_dimensions.width?;
3769 if let Some(height) = known_dimensions.height {
3770 return Some(size(width, height));
3771 }
3772
3773 let style = editor.style.as_ref().unwrap();
3774 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3775 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3776 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3777 let em_width = cx
3778 .text_system()
3779 .typographic_bounds(font_id, font_size, 'm')
3780 .unwrap()
3781 .size
3782 .width;
3783
3784 let mut snapshot = editor.snapshot(cx);
3785 let gutter_padding;
3786 let gutter_width;
3787 let gutter_margin;
3788 if snapshot.show_gutter {
3789 let descent = cx.text_system().descent(font_id, font_size);
3790 let gutter_padding_factor = 3.5;
3791 gutter_padding = (em_width * gutter_padding_factor).round();
3792 gutter_width = max_line_number_width + gutter_padding * 2.0;
3793 gutter_margin = -descent;
3794 } else {
3795 gutter_padding = Pixels::ZERO;
3796 gutter_width = Pixels::ZERO;
3797 gutter_margin = Pixels::ZERO;
3798 };
3799
3800 editor.gutter_width = gutter_width;
3801 let text_width = width - gutter_width;
3802 let overscroll = size(em_width, px(0.));
3803
3804 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3805 if editor.set_wrap_width(Some(editor_width), cx) {
3806 snapshot = editor.snapshot(cx);
3807 }
3808
3809 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3810 let height = scroll_height
3811 .max(line_height)
3812 .min(line_height * max_lines as f32);
3813
3814 Some(size(width, height))
3815}