1use crate::{
2 display_map::{
3 BlockContext, BlockStyle, DisplaySnapshot, FoldStatus, HighlightedChunk, ToDisplayPoint,
4 TransformBlock,
5 },
6 editor_settings::ShowScrollbar,
7 git::{diff_hunk_to_display, DisplayDiffHunk},
8 hover_popover::{
9 self, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 link_go_to_definition::{
12 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
13 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
14 LinkGoToDefinitionState,
15 },
16 mouse_context_menu,
17 scroll::scroll_amount::ScrollAmount,
18 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
19 HalfPageDown, HalfPageUp, LineDown, LineUp, MoveDown, OpenExcerpts, PageDown, PageUp, Point,
20 SelectPhase, Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
21};
22use anyhow::Result;
23use collections::{BTreeMap, HashMap};
24use git::diff::DiffHunkStatus;
25use gpui::{
26 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
27 AnchorCorner, AnyElement, AsyncWindowContext, AvailableSpace, BorrowWindow, Bounds,
28 ContentMask, Corners, CursorStyle, DispatchPhase, Edges, Element, ElementId,
29 ElementInputHandler, Entity, EntityId, Hsla, InteractiveBounds, InteractiveElement,
30 IntoElement, LineLayout, ModifiersChangedEvent, MouseButton, MouseDownEvent, MouseMoveEvent,
31 MouseUpEvent, ParentElement, Pixels, RenderOnce, ScrollWheelEvent, ShapedLine, SharedString,
32 Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun, TextStyle, View,
33 ViewContext, WeakView, WindowContext, WrappedLine,
34};
35use itertools::Itertools;
36use language::{language_settings::ShowWhitespaceSetting, Language};
37use multi_buffer::Anchor;
38use project::{
39 project_settings::{GitGutterSetting, ProjectSettings},
40 ProjectPath,
41};
42use settings::Settings;
43use smallvec::SmallVec;
44use std::{
45 any::TypeId,
46 borrow::Cow,
47 cmp::{self, Ordering},
48 fmt::Write,
49 iter,
50 ops::Range,
51 sync::Arc,
52};
53use sum_tree::Bias;
54use theme::{ActiveTheme, PlayerColor};
55use ui::{
56 h_stack, ButtonLike, ButtonStyle, Disclosure, IconButton, IconElement, IconSize, Label, Tooltip,
57};
58use ui::{prelude::*, Icon};
59use util::ResultExt;
60use workspace::item::Item;
61
62enum FoldMarkers {}
63
64struct SelectionLayout {
65 head: DisplayPoint,
66 cursor_shape: CursorShape,
67 is_newest: bool,
68 is_local: bool,
69 range: Range<DisplayPoint>,
70 active_rows: Range<u32>,
71}
72
73impl SelectionLayout {
74 fn new<T: ToPoint + ToDisplayPoint + Clone>(
75 selection: Selection<T>,
76 line_mode: bool,
77 cursor_shape: CursorShape,
78 map: &DisplaySnapshot,
79 is_newest: bool,
80 is_local: bool,
81 ) -> Self {
82 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
83 let display_selection = point_selection.map(|p| p.to_display_point(map));
84 let mut range = display_selection.range();
85 let mut head = display_selection.head();
86 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
87 ..map.next_line_boundary(point_selection.end).1.row();
88
89 // vim visual line mode
90 if line_mode {
91 let point_range = map.expand_to_line(point_selection.range());
92 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
93 }
94
95 // any vim visual mode (including line mode)
96 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
97 if head.column() > 0 {
98 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
99 } else if head.row() > 0 && head != map.max_point() {
100 head = map.clip_point(
101 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
102 Bias::Left,
103 );
104 // updating range.end is a no-op unless you're cursor is
105 // on the newline containing a multi-buffer divider
106 // in which case the clip_point may have moved the head up
107 // an additional row.
108 range.end = DisplayPoint::new(head.row() + 1, 0);
109 active_rows.end = head.row();
110 }
111 }
112
113 Self {
114 head,
115 cursor_shape,
116 is_newest,
117 is_local,
118 range,
119 active_rows,
120 }
121 }
122}
123
124pub struct EditorElement {
125 editor: View<Editor>,
126 style: EditorStyle,
127}
128
129impl EditorElement {
130 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
131 Self {
132 editor: editor.clone(),
133 style,
134 }
135 }
136
137 fn register_actions(&self, cx: &mut WindowContext) {
138 let view = &self.editor;
139 view.update(cx, |editor, cx| {
140 for action in editor.editor_actions.iter() {
141 (action)(cx)
142 }
143 });
144
145 crate::rust_analyzer_ext::apply_related_actions(view, cx);
146 register_action(view, cx, Editor::move_left);
147 register_action(view, cx, Editor::move_right);
148 register_action(view, cx, Editor::move_down);
149 register_action(view, cx, Editor::move_up);
150 register_action(view, cx, Editor::cancel);
151 register_action(view, cx, Editor::newline);
152 register_action(view, cx, Editor::newline_above);
153 register_action(view, cx, Editor::newline_below);
154 register_action(view, cx, Editor::backspace);
155 register_action(view, cx, Editor::delete);
156 register_action(view, cx, Editor::tab);
157 register_action(view, cx, Editor::tab_prev);
158 register_action(view, cx, Editor::indent);
159 register_action(view, cx, Editor::outdent);
160 register_action(view, cx, Editor::delete_line);
161 register_action(view, cx, Editor::join_lines);
162 register_action(view, cx, Editor::sort_lines_case_sensitive);
163 register_action(view, cx, Editor::sort_lines_case_insensitive);
164 register_action(view, cx, Editor::reverse_lines);
165 register_action(view, cx, Editor::shuffle_lines);
166 register_action(view, cx, Editor::convert_to_upper_case);
167 register_action(view, cx, Editor::convert_to_lower_case);
168 register_action(view, cx, Editor::convert_to_title_case);
169 register_action(view, cx, Editor::convert_to_snake_case);
170 register_action(view, cx, Editor::convert_to_kebab_case);
171 register_action(view, cx, Editor::convert_to_upper_camel_case);
172 register_action(view, cx, Editor::convert_to_lower_camel_case);
173 register_action(view, cx, Editor::delete_to_previous_word_start);
174 register_action(view, cx, Editor::delete_to_previous_subword_start);
175 register_action(view, cx, Editor::delete_to_next_word_end);
176 register_action(view, cx, Editor::delete_to_next_subword_end);
177 register_action(view, cx, Editor::delete_to_beginning_of_line);
178 register_action(view, cx, Editor::delete_to_end_of_line);
179 register_action(view, cx, Editor::cut_to_end_of_line);
180 register_action(view, cx, Editor::duplicate_line);
181 register_action(view, cx, Editor::move_line_up);
182 register_action(view, cx, Editor::move_line_down);
183 register_action(view, cx, Editor::transpose);
184 register_action(view, cx, Editor::cut);
185 register_action(view, cx, Editor::copy);
186 register_action(view, cx, Editor::paste);
187 register_action(view, cx, Editor::undo);
188 register_action(view, cx, Editor::redo);
189 register_action(view, cx, Editor::move_page_up);
190 register_action(view, cx, Editor::move_page_down);
191 register_action(view, cx, Editor::next_screen);
192 register_action(view, cx, Editor::scroll_cursor_top);
193 register_action(view, cx, Editor::scroll_cursor_center);
194 register_action(view, cx, Editor::scroll_cursor_bottom);
195 register_action(view, cx, |editor, _: &LineDown, cx| {
196 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
197 });
198 register_action(view, cx, |editor, _: &LineUp, cx| {
199 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
200 });
201 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
202 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
203 });
204 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
205 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
206 });
207 register_action(view, cx, |editor, _: &PageDown, cx| {
208 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
209 });
210 register_action(view, cx, |editor, _: &PageUp, cx| {
211 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
212 });
213 register_action(view, cx, Editor::move_to_previous_word_start);
214 register_action(view, cx, Editor::move_to_previous_subword_start);
215 register_action(view, cx, Editor::move_to_next_word_end);
216 register_action(view, cx, Editor::move_to_next_subword_end);
217 register_action(view, cx, Editor::move_to_beginning_of_line);
218 register_action(view, cx, Editor::move_to_end_of_line);
219 register_action(view, cx, Editor::move_to_start_of_paragraph);
220 register_action(view, cx, Editor::move_to_end_of_paragraph);
221 register_action(view, cx, Editor::move_to_beginning);
222 register_action(view, cx, Editor::move_to_end);
223 register_action(view, cx, Editor::select_up);
224 register_action(view, cx, Editor::select_down);
225 register_action(view, cx, Editor::select_left);
226 register_action(view, cx, Editor::select_right);
227 register_action(view, cx, Editor::select_to_previous_word_start);
228 register_action(view, cx, Editor::select_to_previous_subword_start);
229 register_action(view, cx, Editor::select_to_next_word_end);
230 register_action(view, cx, Editor::select_to_next_subword_end);
231 register_action(view, cx, Editor::select_to_beginning_of_line);
232 register_action(view, cx, Editor::select_to_end_of_line);
233 register_action(view, cx, Editor::select_to_start_of_paragraph);
234 register_action(view, cx, Editor::select_to_end_of_paragraph);
235 register_action(view, cx, Editor::select_to_beginning);
236 register_action(view, cx, Editor::select_to_end);
237 register_action(view, cx, Editor::select_all);
238 register_action(view, cx, |editor, action, cx| {
239 editor.select_all_matches(action, cx).log_err();
240 });
241 register_action(view, cx, Editor::select_line);
242 register_action(view, cx, Editor::split_selection_into_lines);
243 register_action(view, cx, Editor::add_selection_above);
244 register_action(view, cx, Editor::add_selection_below);
245 register_action(view, cx, |editor, action, cx| {
246 editor.select_next(action, cx).log_err();
247 });
248 register_action(view, cx, |editor, action, cx| {
249 editor.select_previous(action, cx).log_err();
250 });
251 register_action(view, cx, Editor::toggle_comments);
252 register_action(view, cx, Editor::select_larger_syntax_node);
253 register_action(view, cx, Editor::select_smaller_syntax_node);
254 register_action(view, cx, Editor::move_to_enclosing_bracket);
255 register_action(view, cx, Editor::undo_selection);
256 register_action(view, cx, Editor::redo_selection);
257 register_action(view, cx, Editor::go_to_diagnostic);
258 register_action(view, cx, Editor::go_to_prev_diagnostic);
259 register_action(view, cx, Editor::go_to_hunk);
260 register_action(view, cx, Editor::go_to_prev_hunk);
261 register_action(view, cx, Editor::go_to_definition);
262 register_action(view, cx, Editor::go_to_definition_split);
263 register_action(view, cx, Editor::go_to_type_definition);
264 register_action(view, cx, Editor::go_to_type_definition_split);
265 register_action(view, cx, Editor::fold);
266 register_action(view, cx, Editor::fold_at);
267 register_action(view, cx, Editor::unfold_lines);
268 register_action(view, cx, Editor::unfold_at);
269 register_action(view, cx, Editor::fold_selected_ranges);
270 register_action(view, cx, Editor::show_completions);
271 register_action(view, cx, Editor::toggle_code_actions);
272 register_action(view, cx, Editor::open_excerpts);
273 register_action(view, cx, Editor::toggle_soft_wrap);
274 register_action(view, cx, Editor::toggle_inlay_hints);
275 register_action(view, cx, hover_popover::hover);
276 register_action(view, cx, Editor::reveal_in_finder);
277 register_action(view, cx, Editor::copy_path);
278 register_action(view, cx, Editor::copy_relative_path);
279 register_action(view, cx, Editor::copy_highlight_json);
280 register_action(view, cx, |editor, action, cx| {
281 if let Some(task) = editor.format(action, cx) {
282 task.detach_and_log_err(cx);
283 } else {
284 cx.propagate();
285 }
286 });
287 register_action(view, cx, Editor::restart_language_server);
288 register_action(view, cx, Editor::show_character_palette);
289 register_action(view, cx, |editor, action, cx| {
290 if let Some(task) = editor.confirm_completion(action, cx) {
291 task.detach_and_log_err(cx);
292 } else {
293 cx.propagate();
294 }
295 });
296 register_action(view, cx, |editor, action, cx| {
297 if let Some(task) = editor.confirm_code_action(action, cx) {
298 task.detach_and_log_err(cx);
299 } else {
300 cx.propagate();
301 }
302 });
303 register_action(view, cx, |editor, action, cx| {
304 if let Some(task) = editor.rename(action, cx) {
305 task.detach_and_log_err(cx);
306 } else {
307 cx.propagate();
308 }
309 });
310 register_action(view, cx, |editor, action, cx| {
311 if let Some(task) = editor.confirm_rename(action, cx) {
312 task.detach_and_log_err(cx);
313 } else {
314 cx.propagate();
315 }
316 });
317 register_action(view, cx, |editor, action, cx| {
318 if let Some(task) = editor.find_all_references(action, cx) {
319 task.detach_and_log_err(cx);
320 } else {
321 cx.propagate();
322 }
323 });
324 register_action(view, cx, Editor::next_copilot_suggestion);
325 register_action(view, cx, Editor::previous_copilot_suggestion);
326 register_action(view, cx, Editor::copilot_suggest);
327 register_action(view, cx, Editor::context_menu_first);
328 register_action(view, cx, Editor::context_menu_prev);
329 register_action(view, cx, Editor::context_menu_next);
330 register_action(view, cx, Editor::context_menu_last);
331 }
332
333 fn register_key_listeners(&self, cx: &mut WindowContext) {
334 cx.on_key_event({
335 let editor = self.editor.clone();
336 move |event: &ModifiersChangedEvent, phase, cx| {
337 if phase != DispatchPhase::Bubble {
338 return;
339 }
340
341 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
342 cx.stop_propagation();
343 }
344 }
345 });
346 }
347
348 pub(crate) fn modifiers_changed(
349 editor: &mut Editor,
350 event: &ModifiersChangedEvent,
351 cx: &mut ViewContext<Editor>,
352 ) -> bool {
353 let pending_selection = editor.has_pending_selection();
354
355 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
356 if event.command && !pending_selection {
357 let point = point.clone();
358 let snapshot = editor.snapshot(cx);
359 let kind = point.definition_kind(event.shift);
360
361 show_link_definition(kind, editor, point, snapshot, cx);
362 return false;
363 }
364 }
365
366 {
367 if editor.link_go_to_definition_state.symbol_range.is_some()
368 || !editor.link_go_to_definition_state.definitions.is_empty()
369 {
370 editor.link_go_to_definition_state.symbol_range.take();
371 editor.link_go_to_definition_state.definitions.clear();
372 cx.notify();
373 }
374
375 editor.link_go_to_definition_state.task = None;
376
377 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
378 }
379
380 false
381 }
382
383 fn mouse_left_down(
384 editor: &mut Editor,
385 event: &MouseDownEvent,
386 position_map: &PositionMap,
387 text_bounds: Bounds<Pixels>,
388 gutter_bounds: Bounds<Pixels>,
389 stacking_order: &StackingOrder,
390 cx: &mut ViewContext<Editor>,
391 ) {
392 let mut click_count = event.click_count;
393 let modifiers = event.modifiers;
394
395 if gutter_bounds.contains(&event.position) {
396 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
397 } else if !text_bounds.contains(&event.position) {
398 return;
399 }
400 if !cx.was_top_layer(&event.position, stacking_order) {
401 return;
402 }
403
404 let point_for_position = position_map.point_for_position(text_bounds, event.position);
405 let position = point_for_position.previous_valid;
406 if modifiers.shift && modifiers.alt {
407 editor.select(
408 SelectPhase::BeginColumnar {
409 position,
410 goal_column: point_for_position.exact_unclipped.column(),
411 },
412 cx,
413 );
414 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
415 editor.select(
416 SelectPhase::Extend {
417 position,
418 click_count,
419 },
420 cx,
421 );
422 } else {
423 editor.select(
424 SelectPhase::Begin {
425 position,
426 add: modifiers.alt,
427 click_count,
428 },
429 cx,
430 );
431 }
432
433 cx.stop_propagation();
434 }
435
436 fn mouse_right_down(
437 editor: &mut Editor,
438 event: &MouseDownEvent,
439 position_map: &PositionMap,
440 text_bounds: Bounds<Pixels>,
441 cx: &mut ViewContext<Editor>,
442 ) {
443 if !text_bounds.contains(&event.position) {
444 return;
445 }
446 let point_for_position = position_map.point_for_position(text_bounds, event.position);
447 mouse_context_menu::deploy_context_menu(
448 editor,
449 event.position,
450 point_for_position.previous_valid,
451 cx,
452 );
453 cx.stop_propagation();
454 }
455
456 fn mouse_up(
457 editor: &mut Editor,
458 event: &MouseUpEvent,
459 position_map: &PositionMap,
460 text_bounds: Bounds<Pixels>,
461 stacking_order: &StackingOrder,
462 cx: &mut ViewContext<Editor>,
463 ) {
464 let end_selection = editor.has_pending_selection();
465 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
466
467 if end_selection {
468 editor.select(SelectPhase::End, cx);
469 }
470
471 if !pending_nonempty_selections
472 && event.modifiers.command
473 && text_bounds.contains(&event.position)
474 && cx.was_top_layer(&event.position, stacking_order)
475 {
476 let point = position_map.point_for_position(text_bounds, event.position);
477 let could_be_inlay = point.as_valid().is_none();
478 let split = event.modifiers.alt;
479 if event.modifiers.shift || could_be_inlay {
480 go_to_fetched_type_definition(editor, point, split, cx);
481 } else {
482 go_to_fetched_definition(editor, point, split, cx);
483 }
484
485 cx.stop_propagation();
486 } else if end_selection {
487 cx.stop_propagation();
488 }
489 }
490
491 fn mouse_moved(
492 editor: &mut Editor,
493 event: &MouseMoveEvent,
494 position_map: &PositionMap,
495 text_bounds: Bounds<Pixels>,
496 gutter_bounds: Bounds<Pixels>,
497 stacking_order: &StackingOrder,
498 cx: &mut ViewContext<Editor>,
499 ) {
500 let modifiers = event.modifiers;
501 if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
502 let point_for_position = position_map.point_for_position(text_bounds, event.position);
503 let mut scroll_delta = gpui::Point::<f32>::default();
504 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
505 let top = text_bounds.origin.y + vertical_margin;
506 let bottom = text_bounds.lower_left().y - vertical_margin;
507 if event.position.y < top {
508 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
509 }
510 if event.position.y > bottom {
511 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
512 }
513
514 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
515 let left = text_bounds.origin.x + horizontal_margin;
516 let right = text_bounds.upper_right().x - horizontal_margin;
517 if event.position.x < left {
518 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
519 }
520 if event.position.x > right {
521 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
522 }
523
524 editor.select(
525 SelectPhase::Update {
526 position: point_for_position.previous_valid,
527 goal_column: point_for_position.exact_unclipped.column(),
528 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
529 .clamp(&gpui::Point::default(), &position_map.scroll_max),
530 },
531 cx,
532 );
533 }
534
535 let text_hovered = text_bounds.contains(&event.position);
536 let gutter_hovered = gutter_bounds.contains(&event.position);
537 let was_top = cx.was_top_layer(&event.position, stacking_order);
538
539 editor.set_gutter_hovered(gutter_hovered, cx);
540
541 // Don't trigger hover popover if mouse is hovering over context menu
542 if text_hovered && was_top {
543 let point_for_position = position_map.point_for_position(text_bounds, event.position);
544
545 match point_for_position.as_valid() {
546 Some(point) => {
547 update_go_to_definition_link(
548 editor,
549 Some(GoToDefinitionTrigger::Text(point)),
550 modifiers.command,
551 modifiers.shift,
552 cx,
553 );
554 hover_at(editor, Some(point), cx);
555 }
556 None => {
557 update_inlay_link_and_hover_points(
558 &position_map.snapshot,
559 point_for_position,
560 editor,
561 modifiers.command,
562 modifiers.shift,
563 cx,
564 );
565 }
566 }
567
568 cx.stop_propagation();
569 } else {
570 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
571 hover_at(editor, None, cx);
572 if gutter_hovered && was_top {
573 cx.stop_propagation();
574 }
575 }
576 }
577
578 fn scroll(
579 editor: &mut Editor,
580 event: &ScrollWheelEvent,
581 position_map: &PositionMap,
582 bounds: &InteractiveBounds,
583 cx: &mut ViewContext<Editor>,
584 ) {
585 if !bounds.visibly_contains(&event.position, cx) {
586 return;
587 }
588
589 let line_height = position_map.line_height;
590 let max_glyph_width = position_map.em_width;
591 let (delta, axis) = match event.delta {
592 gpui::ScrollDelta::Pixels(mut pixels) => {
593 //Trackpad
594 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
595 (pixels, axis)
596 }
597
598 gpui::ScrollDelta::Lines(lines) => {
599 //Not trackpad
600 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
601 (pixels, None)
602 }
603 };
604
605 let scroll_position = position_map.snapshot.scroll_position();
606 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
607 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
608 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
609 editor.scroll(scroll_position, axis, cx);
610 cx.stop_propagation();
611 }
612
613 fn paint_background(
614 &self,
615 gutter_bounds: Bounds<Pixels>,
616 text_bounds: Bounds<Pixels>,
617 layout: &LayoutState,
618 cx: &mut WindowContext,
619 ) {
620 let bounds = gutter_bounds.union(&text_bounds);
621 let scroll_top =
622 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
623 let gutter_bg = cx.theme().colors().editor_gutter_background;
624 cx.paint_quad(fill(gutter_bounds, gutter_bg));
625 cx.paint_quad(fill(text_bounds, self.style.background));
626
627 if let EditorMode::Full = layout.mode {
628 let mut active_rows = layout.active_rows.iter().peekable();
629 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
630 let mut end_row = *start_row;
631 while active_rows.peek().map_or(false, |r| {
632 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
633 }) {
634 active_rows.next().unwrap();
635 end_row += 1;
636 }
637
638 if !contains_non_empty_selection {
639 let origin = point(
640 bounds.origin.x,
641 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
642 - scroll_top,
643 );
644 let size = size(
645 bounds.size.width,
646 layout.position_map.line_height * (end_row - start_row + 1) as f32,
647 );
648 let active_line_bg = cx.theme().colors().editor_active_line_background;
649 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
650 }
651 }
652
653 if let Some(highlighted_rows) = &layout.highlighted_rows {
654 let origin = point(
655 bounds.origin.x,
656 bounds.origin.y
657 + (layout.position_map.line_height * highlighted_rows.start as f32)
658 - scroll_top,
659 );
660 let size = size(
661 bounds.size.width,
662 layout.position_map.line_height * highlighted_rows.len() as f32,
663 );
664 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
665 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
666 }
667
668 let scroll_left =
669 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
670
671 for (wrap_position, active) in layout.wrap_guides.iter() {
672 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
673 - scroll_left;
674
675 if x < text_bounds.origin.x
676 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
677 {
678 continue;
679 }
680
681 let color = if *active {
682 cx.theme().colors().editor_active_wrap_guide
683 } else {
684 cx.theme().colors().editor_wrap_guide
685 };
686 cx.paint_quad(fill(
687 Bounds {
688 origin: point(x, text_bounds.origin.y),
689 size: size(px(1.), text_bounds.size.height),
690 },
691 color,
692 ));
693 }
694 }
695 }
696
697 fn paint_gutter(
698 &mut self,
699 bounds: Bounds<Pixels>,
700 layout: &mut LayoutState,
701 cx: &mut WindowContext,
702 ) {
703 let line_height = layout.position_map.line_height;
704
705 let scroll_position = layout.position_map.snapshot.scroll_position();
706 let scroll_top = scroll_position.y * line_height;
707
708 let show_gutter = matches!(
709 ProjectSettings::get_global(cx).git.git_gutter,
710 Some(GitGutterSetting::TrackedFiles)
711 );
712
713 if show_gutter {
714 Self::paint_diff_hunks(bounds, layout, cx);
715 }
716
717 for (ix, line) in layout.line_numbers.iter().enumerate() {
718 if let Some(line) = line {
719 let line_origin = bounds.origin
720 + point(
721 bounds.size.width - line.width - layout.gutter_padding,
722 ix as f32 * line_height - (scroll_top % line_height),
723 );
724
725 line.paint(line_origin, line_height, cx);
726 }
727 }
728
729 cx.with_z_index(1, |cx| {
730 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
731 if let Some(mut fold_indicator) = fold_indicator {
732 let mut fold_indicator = fold_indicator.into_any_element();
733 let available_space = size(
734 AvailableSpace::MinContent,
735 AvailableSpace::Definite(line_height * 0.55),
736 );
737 let fold_indicator_size = fold_indicator.measure(available_space, cx);
738
739 let position = point(
740 bounds.size.width - layout.gutter_padding,
741 ix as f32 * line_height - (scroll_top % line_height),
742 );
743 let centering_offset = point(
744 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
745 / 2.,
746 (line_height - fold_indicator_size.height) / 2.,
747 );
748 let origin = bounds.origin + position + centering_offset;
749 fold_indicator.draw(origin, available_space, cx);
750 }
751 }
752
753 if let Some(indicator) = layout.code_actions_indicator.take() {
754 let mut button = indicator.button.into_any_element();
755 let available_space = size(
756 AvailableSpace::MinContent,
757 AvailableSpace::Definite(line_height),
758 );
759 let indicator_size = button.measure(available_space, cx);
760
761 let mut x = Pixels::ZERO;
762 let mut y = indicator.row as f32 * line_height - scroll_top;
763 // Center indicator.
764 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
765 y += (line_height - indicator_size.height) / 2.;
766
767 button.draw(bounds.origin + point(x, y), available_space, cx);
768 }
769 });
770 }
771
772 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
773 let line_height = layout.position_map.line_height;
774
775 let scroll_position = layout.position_map.snapshot.scroll_position();
776 let scroll_top = scroll_position.y * line_height;
777
778 for hunk in &layout.display_hunks {
779 let (display_row_range, status) = match hunk {
780 //TODO: This rendering is entirely a horrible hack
781 &DisplayDiffHunk::Folded { display_row: row } => {
782 let start_y = row as f32 * line_height - scroll_top;
783 let end_y = start_y + line_height;
784
785 let width = 0.275 * line_height;
786 let highlight_origin = bounds.origin + point(-width, start_y);
787 let highlight_size = size(width * 2., end_y - start_y);
788 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
789 cx.paint_quad(quad(
790 highlight_bounds,
791 Corners::all(1. * line_height),
792 gpui::yellow(), // todo!("use the right color")
793 Edges::default(),
794 transparent_black(),
795 ));
796
797 continue;
798 }
799
800 DisplayDiffHunk::Unfolded {
801 display_row_range,
802 status,
803 } => (display_row_range, status),
804 };
805
806 let color = match status {
807 DiffHunkStatus::Added => cx.theme().status().created,
808 DiffHunkStatus::Modified => cx.theme().status().modified,
809
810 //TODO: This rendering is entirely a horrible hack
811 DiffHunkStatus::Removed => {
812 let row = display_row_range.start;
813
814 let offset = line_height / 2.;
815 let start_y = row as f32 * line_height - offset - scroll_top;
816 let end_y = start_y + line_height;
817
818 let width = 0.275 * line_height;
819 let highlight_origin = bounds.origin + point(-width, start_y);
820 let highlight_size = size(width * 2., end_y - start_y);
821 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
822 cx.paint_quad(quad(
823 highlight_bounds,
824 Corners::all(1. * line_height),
825 cx.theme().status().deleted,
826 Edges::default(),
827 transparent_black(),
828 ));
829
830 continue;
831 }
832 };
833
834 let start_row = display_row_range.start;
835 let end_row = display_row_range.end;
836
837 let start_y = start_row as f32 * line_height - scroll_top;
838 let end_y = end_row as f32 * line_height - scroll_top;
839
840 let width = 0.275 * line_height;
841 let highlight_origin = bounds.origin + point(-width, start_y);
842 let highlight_size = size(width * 2., end_y - start_y);
843 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
844 cx.paint_quad(quad(
845 highlight_bounds,
846 Corners::all(0.05 * line_height),
847 color, // todo!("use the right color")
848 Edges::default(),
849 transparent_black(),
850 ));
851 }
852 }
853
854 fn paint_text(
855 &mut self,
856 text_bounds: Bounds<Pixels>,
857 layout: &mut LayoutState,
858 cx: &mut WindowContext,
859 ) {
860 let scroll_position = layout.position_map.snapshot.scroll_position();
861 let start_row = layout.visible_display_row_range.start;
862 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
863 let line_end_overshoot = 0.15 * layout.position_map.line_height;
864 let whitespace_setting = self
865 .editor
866 .read(cx)
867 .buffer
868 .read(cx)
869 .settings_at(0, cx)
870 .show_whitespaces;
871
872 cx.with_content_mask(
873 Some(ContentMask {
874 bounds: text_bounds,
875 }),
876 |cx| {
877 if text_bounds.contains(&cx.mouse_position()) {
878 if self
879 .editor
880 .read(cx)
881 .link_go_to_definition_state
882 .definitions
883 .is_empty()
884 {
885 cx.set_cursor_style(CursorStyle::IBeam);
886 } else {
887 cx.set_cursor_style(CursorStyle::PointingHand);
888 }
889 }
890
891 let fold_corner_radius = 0.15 * layout.position_map.line_height;
892 cx.with_element_id(Some("folds"), |cx| {
893 let snapshot = &layout.position_map.snapshot;
894 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
895 let fold_range = fold.range.clone();
896 let display_range = fold.range.start.to_display_point(&snapshot)
897 ..fold.range.end.to_display_point(&snapshot);
898 debug_assert_eq!(display_range.start.row(), display_range.end.row());
899 let row = display_range.start.row();
900
901 let line_layout = &layout.position_map.line_layouts
902 [(row - layout.visible_display_row_range.start) as usize]
903 .line;
904 let start_x = content_origin.x
905 + line_layout.x_for_index(display_range.start.column() as usize)
906 - layout.position_map.scroll_position.x;
907 let start_y = content_origin.y
908 + row as f32 * layout.position_map.line_height
909 - layout.position_map.scroll_position.y;
910 let end_x = content_origin.x
911 + line_layout.x_for_index(display_range.end.column() as usize)
912 - layout.position_map.scroll_position.x;
913
914 let fold_bounds = Bounds {
915 origin: point(start_x, start_y),
916 size: size(end_x - start_x, layout.position_map.line_height),
917 };
918
919 let fold_background = cx.with_z_index(1, |cx| {
920 div()
921 .id(fold.id)
922 .size_full()
923 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
924 .on_click(cx.listener_for(
925 &self.editor,
926 move |editor: &mut Editor, _, cx| {
927 editor.unfold_ranges(
928 [fold_range.start..fold_range.end],
929 true,
930 false,
931 cx,
932 );
933 cx.stop_propagation();
934 },
935 ))
936 .draw(
937 fold_bounds.origin,
938 fold_bounds.size,
939 cx,
940 |fold_element_state, cx| {
941 if fold_element_state.is_active() {
942 gpui::blue()
943 } else if fold_bounds.contains(&cx.mouse_position()) {
944 gpui::black()
945 } else {
946 gpui::red()
947 }
948 },
949 )
950 });
951
952 self.paint_highlighted_range(
953 display_range.clone(),
954 fold_background,
955 fold_corner_radius,
956 fold_corner_radius * 2.,
957 layout,
958 content_origin,
959 text_bounds,
960 cx,
961 );
962 }
963 });
964
965 for (range, color) in &layout.highlighted_ranges {
966 self.paint_highlighted_range(
967 range.clone(),
968 *color,
969 Pixels::ZERO,
970 line_end_overshoot,
971 layout,
972 content_origin,
973 text_bounds,
974 cx,
975 );
976 }
977
978 let mut cursors = SmallVec::<[Cursor; 32]>::new();
979 let corner_radius = 0.15 * layout.position_map.line_height;
980 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
981
982 for (selection_style, selections) in &layout.selections {
983 for selection in selections {
984 self.paint_highlighted_range(
985 selection.range.clone(),
986 selection_style.selection,
987 corner_radius,
988 corner_radius * 2.,
989 layout,
990 content_origin,
991 text_bounds,
992 cx,
993 );
994
995 if selection.is_local && !selection.range.is_empty() {
996 invisible_display_ranges.push(selection.range.clone());
997 }
998
999 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1000 let cursor_position = selection.head;
1001 if layout
1002 .visible_display_row_range
1003 .contains(&cursor_position.row())
1004 {
1005 let cursor_row_layout = &layout.position_map.line_layouts
1006 [(cursor_position.row() - start_row) as usize]
1007 .line;
1008 let cursor_column = cursor_position.column() as usize;
1009
1010 let cursor_character_x =
1011 cursor_row_layout.x_for_index(cursor_column);
1012 let mut block_width = cursor_row_layout
1013 .x_for_index(cursor_column + 1)
1014 - cursor_character_x;
1015 if block_width == Pixels::ZERO {
1016 block_width = layout.position_map.em_width;
1017 }
1018 let block_text = if let CursorShape::Block = selection.cursor_shape
1019 {
1020 layout
1021 .position_map
1022 .snapshot
1023 .chars_at(cursor_position)
1024 .next()
1025 .and_then(|(character, _)| {
1026 // todo!() currently shape_line panics if text conatins newlines
1027 let text = if character == '\n' {
1028 SharedString::from(" ")
1029 } else {
1030 SharedString::from(character.to_string())
1031 };
1032 let len = text.len();
1033 cx.text_system()
1034 .shape_line(
1035 text,
1036 cursor_row_layout.font_size,
1037 &[TextRun {
1038 len,
1039 font: self.style.text.font(),
1040 color: self.style.background,
1041 background_color: None,
1042 underline: None,
1043 }],
1044 )
1045 .log_err()
1046 })
1047 } else {
1048 None
1049 };
1050
1051 let x = cursor_character_x - layout.position_map.scroll_position.x;
1052 let y = cursor_position.row() as f32
1053 * layout.position_map.line_height
1054 - layout.position_map.scroll_position.y;
1055 if selection.is_newest {
1056 self.editor.update(cx, |editor, _| {
1057 editor.pixel_position_of_newest_cursor = Some(point(
1058 text_bounds.origin.x + x + block_width / 2.,
1059 text_bounds.origin.y
1060 + y
1061 + layout.position_map.line_height / 2.,
1062 ))
1063 });
1064 }
1065 cursors.push(Cursor {
1066 color: selection_style.cursor,
1067 block_width,
1068 origin: point(x, y),
1069 line_height: layout.position_map.line_height,
1070 shape: selection.cursor_shape,
1071 block_text,
1072 });
1073 }
1074 }
1075 }
1076 }
1077
1078 for (ix, line_with_invisibles) in
1079 layout.position_map.line_layouts.iter().enumerate()
1080 {
1081 let row = start_row + ix as u32;
1082 line_with_invisibles.draw(
1083 layout,
1084 row,
1085 content_origin,
1086 whitespace_setting,
1087 &invisible_display_ranges,
1088 cx,
1089 )
1090 }
1091
1092 cx.with_z_index(0, |cx| {
1093 for cursor in cursors {
1094 cursor.paint(content_origin, cx);
1095 }
1096 });
1097
1098 cx.with_z_index(2, |cx| {
1099 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1100 let available_space =
1101 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1102 let context_menu_size = context_menu.measure(available_space, cx);
1103
1104 let cursor_row_layout = &layout.position_map.line_layouts
1105 [(position.row() - start_row) as usize]
1106 .line;
1107 let x = cursor_row_layout.x_for_index(position.column() as usize)
1108 - layout.position_map.scroll_position.x;
1109 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1110 - layout.position_map.scroll_position.y;
1111 let mut list_origin = content_origin + point(x, y);
1112 let list_width = context_menu_size.width;
1113 let list_height = context_menu_size.height;
1114
1115 // Snap the right edge of the list to the right edge of the window if
1116 // its horizontal bounds overflow.
1117 if list_origin.x + list_width > cx.viewport_size().width {
1118 list_origin.x =
1119 (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1120 }
1121
1122 if list_origin.y + list_height > text_bounds.lower_right().y {
1123 list_origin.y -= layout.position_map.line_height + list_height;
1124 }
1125
1126 cx.break_content_mask(|cx| {
1127 context_menu.draw(list_origin, available_space, cx)
1128 });
1129 }
1130
1131 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1132 let available_space =
1133 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1134
1135 // This is safe because we check on layout whether the required row is available
1136 let hovered_row_layout = &layout.position_map.line_layouts
1137 [(position.row() - start_row) as usize]
1138 .line;
1139
1140 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1141 // height. This is the size we will use to decide whether to render popovers above or below
1142 // the hovered line.
1143 let first_size = hover_popovers[0].measure(available_space, cx);
1144 let height_to_reserve = first_size.height
1145 + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1146
1147 // Compute Hovered Point
1148 let x = hovered_row_layout.x_for_index(position.column() as usize)
1149 - layout.position_map.scroll_position.x;
1150 let y = position.row() as f32 * layout.position_map.line_height
1151 - layout.position_map.scroll_position.y;
1152 let hovered_point = content_origin + point(x, y);
1153
1154 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1155 // There is enough space above. Render popovers above the hovered point
1156 let mut current_y = hovered_point.y;
1157 for mut hover_popover in hover_popovers {
1158 let size = hover_popover.measure(available_space, cx);
1159 let mut popover_origin =
1160 point(hovered_point.x, current_y - size.height);
1161
1162 let x_out_of_bounds =
1163 text_bounds.upper_right().x - (popover_origin.x + size.width);
1164 if x_out_of_bounds < Pixels::ZERO {
1165 popover_origin.x = popover_origin.x + x_out_of_bounds;
1166 }
1167
1168 cx.break_content_mask(|cx| {
1169 hover_popover.draw(popover_origin, available_space, cx)
1170 });
1171
1172 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1173 }
1174 } else {
1175 // There is not enough space above. Render popovers below the hovered point
1176 let mut current_y = hovered_point.y + layout.position_map.line_height;
1177 for mut hover_popover in hover_popovers {
1178 let size = hover_popover.measure(available_space, cx);
1179 let mut popover_origin = point(hovered_point.x, current_y);
1180
1181 let x_out_of_bounds =
1182 text_bounds.upper_right().x - (popover_origin.x + size.width);
1183 if x_out_of_bounds < Pixels::ZERO {
1184 popover_origin.x = popover_origin.x + x_out_of_bounds;
1185 }
1186
1187 hover_popover.draw(popover_origin, available_space, cx);
1188
1189 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1190 }
1191 }
1192 }
1193
1194 if let Some(mouse_context_menu) =
1195 self.editor.read(cx).mouse_context_menu.as_ref()
1196 {
1197 let element = overlay()
1198 .position(mouse_context_menu.position)
1199 .child(mouse_context_menu.context_menu.clone())
1200 .anchor(AnchorCorner::TopLeft)
1201 .snap_to_window();
1202 element.draw(
1203 gpui::Point::default(),
1204 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1205 cx,
1206 |_, _| {},
1207 );
1208 }
1209 })
1210 },
1211 )
1212 }
1213
1214 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1215 bounds.upper_right().x - self.style.scrollbar_width
1216 }
1217
1218 fn paint_scrollbar(
1219 &mut self,
1220 bounds: Bounds<Pixels>,
1221 layout: &mut LayoutState,
1222 cx: &mut WindowContext,
1223 ) {
1224 if layout.mode != EditorMode::Full {
1225 return;
1226 }
1227
1228 let top = bounds.origin.y;
1229 let bottom = bounds.lower_left().y;
1230 let right = bounds.lower_right().x;
1231 let left = self.scrollbar_left(&bounds);
1232 let row_range = layout.scrollbar_row_range.clone();
1233 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1234
1235 let mut height = bounds.size.height;
1236 let mut first_row_y_offset = px(0.0);
1237
1238 // Impose a minimum height on the scrollbar thumb
1239 let row_height = height / max_row;
1240 let min_thumb_height = layout.position_map.line_height;
1241 let thumb_height = (row_range.end - row_range.start) * row_height;
1242 if thumb_height < min_thumb_height {
1243 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1244 height -= min_thumb_height - thumb_height;
1245 }
1246
1247 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1248
1249 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1250 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1251 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1252 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1253
1254 if layout.show_scrollbars {
1255 cx.paint_quad(quad(
1256 track_bounds,
1257 Corners::default(),
1258 cx.theme().colors().scrollbar_track_background,
1259 Edges {
1260 top: Pixels::ZERO,
1261 right: Pixels::ZERO,
1262 bottom: Pixels::ZERO,
1263 left: px(1.),
1264 },
1265 cx.theme().colors().scrollbar_track_border,
1266 ));
1267 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1268 if layout.is_singleton && scrollbar_settings.selections {
1269 let start_anchor = Anchor::min();
1270 let end_anchor = Anchor::max();
1271 let background_ranges = self
1272 .editor
1273 .read(cx)
1274 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1275 start_anchor..end_anchor,
1276 &layout.position_map.snapshot,
1277 50000,
1278 );
1279 for range in background_ranges {
1280 let start_y = y_for_row(range.start().row() as f32);
1281 let mut end_y = y_for_row(range.end().row() as f32);
1282 if end_y - start_y < px(1.) {
1283 end_y = start_y + px(1.);
1284 }
1285 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1286 cx.paint_quad(quad(
1287 bounds,
1288 Corners::default(),
1289 cx.theme().status().info,
1290 Edges {
1291 top: Pixels::ZERO,
1292 right: px(1.),
1293 bottom: Pixels::ZERO,
1294 left: px(1.),
1295 },
1296 cx.theme().colors().scrollbar_thumb_border,
1297 ));
1298 }
1299 }
1300
1301 if layout.is_singleton && scrollbar_settings.git_diff {
1302 for hunk in layout
1303 .position_map
1304 .snapshot
1305 .buffer_snapshot
1306 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1307 {
1308 let start_display = Point::new(hunk.buffer_range.start, 0)
1309 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1310 let end_display = Point::new(hunk.buffer_range.end, 0)
1311 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1312 let start_y = y_for_row(start_display.row() as f32);
1313 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1314 y_for_row((end_display.row() + 1) as f32)
1315 } else {
1316 y_for_row((end_display.row()) as f32)
1317 };
1318
1319 if end_y - start_y < px(1.) {
1320 end_y = start_y + px(1.);
1321 }
1322 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1323
1324 let color = match hunk.status() {
1325 DiffHunkStatus::Added => cx.theme().status().created,
1326 DiffHunkStatus::Modified => cx.theme().status().modified,
1327 DiffHunkStatus::Removed => cx.theme().status().deleted,
1328 };
1329 cx.paint_quad(quad(
1330 bounds,
1331 Corners::default(),
1332 color,
1333 Edges {
1334 top: Pixels::ZERO,
1335 right: px(1.),
1336 bottom: Pixels::ZERO,
1337 left: px(1.),
1338 },
1339 cx.theme().colors().scrollbar_thumb_border,
1340 ));
1341 }
1342 }
1343
1344 cx.paint_quad(quad(
1345 thumb_bounds,
1346 Corners::default(),
1347 cx.theme().colors().scrollbar_thumb_background,
1348 Edges {
1349 top: Pixels::ZERO,
1350 right: px(1.),
1351 bottom: Pixels::ZERO,
1352 left: px(1.),
1353 },
1354 cx.theme().colors().scrollbar_thumb_border,
1355 ));
1356 }
1357
1358 let mouse_position = cx.mouse_position();
1359 if track_bounds.contains(&mouse_position) {
1360 cx.set_cursor_style(CursorStyle::Arrow);
1361 }
1362
1363 cx.on_mouse_event({
1364 let editor = self.editor.clone();
1365 move |event: &MouseMoveEvent, phase, cx| {
1366 if phase == DispatchPhase::Capture {
1367 return;
1368 }
1369
1370 editor.update(cx, |editor, cx| {
1371 if event.pressed_button == Some(MouseButton::Left)
1372 && editor.scroll_manager.is_dragging_scrollbar()
1373 {
1374 let y = mouse_position.y;
1375 let new_y = event.position.y;
1376 if thumb_top < y && y < thumb_bottom {
1377 let mut position = editor.scroll_position(cx);
1378 position.y += (new_y - y) * (max_row as f32) / height;
1379 if position.y < 0.0 {
1380 position.y = 0.0;
1381 }
1382 editor.set_scroll_position(position, cx);
1383 }
1384 cx.stop_propagation();
1385 } else {
1386 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1387 if track_bounds.contains(&event.position) {
1388 editor.scroll_manager.show_scrollbar(cx);
1389 }
1390 }
1391 })
1392 }
1393 });
1394
1395 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1396 cx.on_mouse_event({
1397 let editor = self.editor.clone();
1398 move |event: &MouseUpEvent, phase, cx| {
1399 editor.update(cx, |editor, cx| {
1400 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1401 cx.stop_propagation();
1402 });
1403 }
1404 });
1405 } else {
1406 cx.on_mouse_event({
1407 let editor = self.editor.clone();
1408 move |event: &MouseDownEvent, phase, cx| {
1409 editor.update(cx, |editor, cx| {
1410 if track_bounds.contains(&event.position) {
1411 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1412
1413 let y = event.position.y;
1414 if y < thumb_top || thumb_bottom < y {
1415 let center_row =
1416 ((y - top) * max_row as f32 / height).round() as u32;
1417 let top_row = center_row
1418 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1419 let mut position = editor.scroll_position(cx);
1420 position.y = top_row as f32;
1421 editor.set_scroll_position(position, cx);
1422 } else {
1423 editor.scroll_manager.show_scrollbar(cx);
1424 }
1425
1426 cx.stop_propagation();
1427 }
1428 });
1429 }
1430 });
1431 }
1432 }
1433
1434 #[allow(clippy::too_many_arguments)]
1435 fn paint_highlighted_range(
1436 &self,
1437 range: Range<DisplayPoint>,
1438 color: Hsla,
1439 corner_radius: Pixels,
1440 line_end_overshoot: Pixels,
1441 layout: &LayoutState,
1442 content_origin: gpui::Point<Pixels>,
1443 bounds: Bounds<Pixels>,
1444 cx: &mut WindowContext,
1445 ) {
1446 let start_row = layout.visible_display_row_range.start;
1447 let end_row = layout.visible_display_row_range.end;
1448 if range.start != range.end {
1449 let row_range = if range.end.column() == 0 {
1450 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1451 } else {
1452 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1453 };
1454
1455 let highlighted_range = HighlightedRange {
1456 color,
1457 line_height: layout.position_map.line_height,
1458 corner_radius,
1459 start_y: content_origin.y
1460 + row_range.start as f32 * layout.position_map.line_height
1461 - layout.position_map.scroll_position.y,
1462 lines: row_range
1463 .into_iter()
1464 .map(|row| {
1465 let line_layout =
1466 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1467 HighlightedRangeLine {
1468 start_x: if row == range.start.row() {
1469 content_origin.x
1470 + line_layout.x_for_index(range.start.column() as usize)
1471 - layout.position_map.scroll_position.x
1472 } else {
1473 content_origin.x - layout.position_map.scroll_position.x
1474 },
1475 end_x: if row == range.end.row() {
1476 content_origin.x
1477 + line_layout.x_for_index(range.end.column() as usize)
1478 - layout.position_map.scroll_position.x
1479 } else {
1480 content_origin.x + line_layout.width + line_end_overshoot
1481 - layout.position_map.scroll_position.x
1482 },
1483 }
1484 })
1485 .collect(),
1486 };
1487
1488 highlighted_range.paint(bounds, cx);
1489 }
1490 }
1491
1492 fn paint_blocks(
1493 &mut self,
1494 bounds: Bounds<Pixels>,
1495 layout: &mut LayoutState,
1496 cx: &mut WindowContext,
1497 ) {
1498 let scroll_position = layout.position_map.snapshot.scroll_position();
1499 let scroll_left = scroll_position.x * layout.position_map.em_width;
1500 let scroll_top = scroll_position.y * layout.position_map.line_height;
1501
1502 for block in layout.blocks.drain(..) {
1503 let mut origin = bounds.origin
1504 + point(
1505 Pixels::ZERO,
1506 block.row as f32 * layout.position_map.line_height - scroll_top,
1507 );
1508 if !matches!(block.style, BlockStyle::Sticky) {
1509 origin += point(-scroll_left, Pixels::ZERO);
1510 }
1511 block.element.draw(origin, block.available_space, cx);
1512 }
1513 }
1514
1515 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1516 let style = &self.style;
1517 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1518 let layout = cx
1519 .text_system()
1520 .shape_line(
1521 SharedString::from(" ".repeat(column)),
1522 font_size,
1523 &[TextRun {
1524 len: column,
1525 font: style.text.font(),
1526 color: Hsla::default(),
1527 background_color: None,
1528 underline: None,
1529 }],
1530 )
1531 .unwrap();
1532
1533 layout.width
1534 }
1535
1536 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1537 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1538 self.column_pixels(digit_count, cx)
1539 }
1540
1541 //Folds contained in a hunk are ignored apart from shrinking visual size
1542 //If a fold contains any hunks then that fold line is marked as modified
1543 fn layout_git_gutters(
1544 &self,
1545 display_rows: Range<u32>,
1546 snapshot: &EditorSnapshot,
1547 ) -> Vec<DisplayDiffHunk> {
1548 let buffer_snapshot = &snapshot.buffer_snapshot;
1549
1550 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1551 .to_point(snapshot)
1552 .row;
1553 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1554 .to_point(snapshot)
1555 .row;
1556
1557 buffer_snapshot
1558 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1559 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1560 .dedup()
1561 .collect()
1562 }
1563
1564 fn calculate_relative_line_numbers(
1565 &self,
1566 snapshot: &EditorSnapshot,
1567 rows: &Range<u32>,
1568 relative_to: Option<u32>,
1569 ) -> HashMap<u32, u32> {
1570 let mut relative_rows: HashMap<u32, u32> = Default::default();
1571 let Some(relative_to) = relative_to else {
1572 return relative_rows;
1573 };
1574
1575 let start = rows.start.min(relative_to);
1576 let end = rows.end.max(relative_to);
1577
1578 let buffer_rows = snapshot
1579 .buffer_rows(start)
1580 .take(1 + (end - start) as usize)
1581 .collect::<Vec<_>>();
1582
1583 let head_idx = relative_to - start;
1584 let mut delta = 1;
1585 let mut i = head_idx + 1;
1586 while i < buffer_rows.len() as u32 {
1587 if buffer_rows[i as usize].is_some() {
1588 if rows.contains(&(i + start)) {
1589 relative_rows.insert(i + start, delta);
1590 }
1591 delta += 1;
1592 }
1593 i += 1;
1594 }
1595 delta = 1;
1596 i = head_idx.min(buffer_rows.len() as u32 - 1);
1597 while i > 0 && buffer_rows[i as usize].is_none() {
1598 i -= 1;
1599 }
1600
1601 while i > 0 {
1602 i -= 1;
1603 if buffer_rows[i as usize].is_some() {
1604 if rows.contains(&(i + start)) {
1605 relative_rows.insert(i + start, delta);
1606 }
1607 delta += 1;
1608 }
1609 }
1610
1611 relative_rows
1612 }
1613
1614 fn shape_line_numbers(
1615 &self,
1616 rows: Range<u32>,
1617 active_rows: &BTreeMap<u32, bool>,
1618 newest_selection_head: DisplayPoint,
1619 is_singleton: bool,
1620 snapshot: &EditorSnapshot,
1621 cx: &ViewContext<Editor>,
1622 ) -> (
1623 Vec<Option<ShapedLine>>,
1624 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1625 ) {
1626 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1627 let include_line_numbers = snapshot.mode == EditorMode::Full;
1628 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1629 let mut fold_statuses = Vec::with_capacity(rows.len());
1630 let mut line_number = String::new();
1631 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1632 let relative_to = if is_relative {
1633 Some(newest_selection_head.row())
1634 } else {
1635 None
1636 };
1637
1638 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1639
1640 for (ix, row) in snapshot
1641 .buffer_rows(rows.start)
1642 .take((rows.end - rows.start) as usize)
1643 .enumerate()
1644 {
1645 let display_row = rows.start + ix as u32;
1646 let (active, color) = if active_rows.contains_key(&display_row) {
1647 (true, cx.theme().colors().editor_active_line_number)
1648 } else {
1649 (false, cx.theme().colors().editor_line_number)
1650 };
1651 if let Some(buffer_row) = row {
1652 if include_line_numbers {
1653 line_number.clear();
1654 let default_number = buffer_row + 1;
1655 let number = relative_rows
1656 .get(&(ix as u32 + rows.start))
1657 .unwrap_or(&default_number);
1658 write!(&mut line_number, "{}", number).unwrap();
1659 let run = TextRun {
1660 len: line_number.len(),
1661 font: self.style.text.font(),
1662 color,
1663 background_color: None,
1664 underline: None,
1665 };
1666 let shaped_line = cx
1667 .text_system()
1668 .shape_line(line_number.clone().into(), font_size, &[run])
1669 .unwrap();
1670 shaped_line_numbers.push(Some(shaped_line));
1671 fold_statuses.push(
1672 is_singleton
1673 .then(|| {
1674 snapshot
1675 .fold_for_line(buffer_row)
1676 .map(|fold_status| (fold_status, buffer_row, active))
1677 })
1678 .flatten(),
1679 )
1680 }
1681 } else {
1682 fold_statuses.push(None);
1683 shaped_line_numbers.push(None);
1684 }
1685 }
1686
1687 (shaped_line_numbers, fold_statuses)
1688 }
1689
1690 fn layout_lines(
1691 &self,
1692 rows: Range<u32>,
1693 line_number_layouts: &[Option<ShapedLine>],
1694 snapshot: &EditorSnapshot,
1695 cx: &ViewContext<Editor>,
1696 ) -> Vec<LineWithInvisibles> {
1697 if rows.start >= rows.end {
1698 return Vec::new();
1699 }
1700
1701 // When the editor is empty and unfocused, then show the placeholder.
1702 if snapshot.is_empty() {
1703 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1704 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1705 let placeholder_text = snapshot.placeholder_text();
1706 let placeholder_lines = placeholder_text
1707 .as_ref()
1708 .map_or("", AsRef::as_ref)
1709 .split('\n')
1710 .skip(rows.start as usize)
1711 .chain(iter::repeat(""))
1712 .take(rows.len());
1713 placeholder_lines
1714 .filter_map(move |line| {
1715 let run = TextRun {
1716 len: line.len(),
1717 font: self.style.text.font(),
1718 color: placeholder_color,
1719 background_color: None,
1720 underline: Default::default(),
1721 };
1722 cx.text_system()
1723 .shape_line(line.to_string().into(), font_size, &[run])
1724 .log_err()
1725 })
1726 .map(|line| LineWithInvisibles {
1727 line,
1728 invisibles: Vec::new(),
1729 })
1730 .collect()
1731 } else {
1732 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1733 LineWithInvisibles::from_chunks(
1734 chunks,
1735 &self.style.text,
1736 MAX_LINE_LEN,
1737 rows.len() as usize,
1738 line_number_layouts,
1739 snapshot.mode,
1740 cx,
1741 )
1742 }
1743 }
1744
1745 fn compute_layout(
1746 &mut self,
1747 mut bounds: Bounds<Pixels>,
1748 cx: &mut WindowContext,
1749 ) -> LayoutState {
1750 self.editor.update(cx, |editor, cx| {
1751 let snapshot = editor.snapshot(cx);
1752 let style = self.style.clone();
1753
1754 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1755 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1756 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1757 let em_width = cx
1758 .text_system()
1759 .typographic_bounds(font_id, font_size, 'm')
1760 .unwrap()
1761 .size
1762 .width;
1763 let em_advance = cx
1764 .text_system()
1765 .advance(font_id, font_size, 'm')
1766 .unwrap()
1767 .width;
1768
1769 let gutter_padding;
1770 let gutter_width;
1771 let gutter_margin;
1772 if snapshot.show_gutter {
1773 let descent = cx.text_system().descent(font_id, font_size);
1774
1775 let gutter_padding_factor = 3.5;
1776 gutter_padding = (em_width * gutter_padding_factor).round();
1777 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1778 gutter_margin = -descent;
1779 } else {
1780 gutter_padding = Pixels::ZERO;
1781 gutter_width = Pixels::ZERO;
1782 gutter_margin = Pixels::ZERO;
1783 };
1784
1785 editor.gutter_width = gutter_width;
1786
1787 let text_width = bounds.size.width - gutter_width;
1788 let overscroll = size(em_width, px(0.));
1789 let snapshot = {
1790 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1791
1792 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1793 let wrap_width = match editor.soft_wrap_mode(cx) {
1794 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1795 SoftWrap::EditorWidth => editor_width,
1796 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1797 };
1798
1799 if editor.set_wrap_width(Some(wrap_width), cx) {
1800 editor.snapshot(cx)
1801 } else {
1802 snapshot
1803 }
1804 };
1805
1806 let wrap_guides = editor
1807 .wrap_guides(cx)
1808 .iter()
1809 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1810 .collect::<SmallVec<[_; 2]>>();
1811
1812 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1813 let gutter_size = size(gutter_width, bounds.size.height);
1814 let text_size = size(text_width, bounds.size.height);
1815
1816 let autoscroll_horizontally =
1817 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1818 let mut snapshot = editor.snapshot(cx);
1819
1820 let scroll_position = snapshot.scroll_position();
1821 // The scroll position is a fractional point, the whole number of which represents
1822 // the top of the window in terms of display rows.
1823 let start_row = scroll_position.y as u32;
1824 let height_in_lines = f32::from(bounds.size.height / line_height);
1825 let max_row = snapshot.max_point().row();
1826
1827 // Add 1 to ensure selections bleed off screen
1828 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1829
1830 let start_anchor = if start_row == 0 {
1831 Anchor::min()
1832 } else {
1833 snapshot
1834 .buffer_snapshot
1835 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1836 };
1837 let end_anchor = if end_row > max_row {
1838 Anchor::max()
1839 } else {
1840 snapshot
1841 .buffer_snapshot
1842 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1843 };
1844
1845 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1846 let mut active_rows = BTreeMap::new();
1847 let is_singleton = editor.is_singleton(cx);
1848
1849 let highlighted_rows = editor.highlighted_rows();
1850 let highlighted_ranges = editor.background_highlights_in_range(
1851 start_anchor..end_anchor,
1852 &snapshot.display_snapshot,
1853 cx.theme().colors(),
1854 );
1855
1856 let mut newest_selection_head = None;
1857
1858 if editor.show_local_selections {
1859 let mut local_selections: Vec<Selection<Point>> = editor
1860 .selections
1861 .disjoint_in_range(start_anchor..end_anchor, cx);
1862 local_selections.extend(editor.selections.pending(cx));
1863 let mut layouts = Vec::new();
1864 let newest = editor.selections.newest(cx);
1865 for selection in local_selections.drain(..) {
1866 let is_empty = selection.start == selection.end;
1867 let is_newest = selection == newest;
1868
1869 let layout = SelectionLayout::new(
1870 selection,
1871 editor.selections.line_mode,
1872 editor.cursor_shape,
1873 &snapshot.display_snapshot,
1874 is_newest,
1875 true,
1876 );
1877 if is_newest {
1878 newest_selection_head = Some(layout.head);
1879 }
1880
1881 for row in cmp::max(layout.active_rows.start, start_row)
1882 ..=cmp::min(layout.active_rows.end, end_row)
1883 {
1884 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1885 *contains_non_empty_selection |= !is_empty;
1886 }
1887 layouts.push(layout);
1888 }
1889
1890 selections.push((style.local_player, layouts));
1891 }
1892
1893 if let Some(collaboration_hub) = &editor.collaboration_hub {
1894 // When following someone, render the local selections in their color.
1895 if let Some(leader_id) = editor.leader_peer_id {
1896 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1897 if let Some(participant_index) = collaboration_hub
1898 .user_participant_indices(cx)
1899 .get(&collaborator.user_id)
1900 {
1901 if let Some((local_selection_style, _)) = selections.first_mut() {
1902 *local_selection_style = cx
1903 .theme()
1904 .players()
1905 .color_for_participant(participant_index.0);
1906 }
1907 }
1908 }
1909 }
1910
1911 let mut remote_selections = HashMap::default();
1912 for selection in snapshot.remote_selections_in_range(
1913 &(start_anchor..end_anchor),
1914 collaboration_hub.as_ref(),
1915 cx,
1916 ) {
1917 let selection_style = if let Some(participant_index) = selection.participant_index {
1918 cx.theme()
1919 .players()
1920 .color_for_participant(participant_index.0)
1921 } else {
1922 cx.theme().players().absent()
1923 };
1924
1925 // Don't re-render the leader's selections, since the local selections
1926 // match theirs.
1927 if Some(selection.peer_id) == editor.leader_peer_id {
1928 continue;
1929 }
1930
1931 remote_selections
1932 .entry(selection.replica_id)
1933 .or_insert((selection_style, Vec::new()))
1934 .1
1935 .push(SelectionLayout::new(
1936 selection.selection,
1937 selection.line_mode,
1938 selection.cursor_shape,
1939 &snapshot.display_snapshot,
1940 false,
1941 false,
1942 ));
1943 }
1944
1945 selections.extend(remote_selections.into_values());
1946 }
1947
1948 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1949 let show_scrollbars = match scrollbar_settings.show {
1950 ShowScrollbar::Auto => {
1951 // Git
1952 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1953 ||
1954 // Selections
1955 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1956 // Scrollmanager
1957 || editor.scroll_manager.scrollbars_visible()
1958 }
1959 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1960 ShowScrollbar::Always => true,
1961 ShowScrollbar::Never => false,
1962 };
1963
1964 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1965 let newest = editor.selections.newest::<Point>(cx);
1966 SelectionLayout::new(
1967 newest,
1968 editor.selections.line_mode,
1969 editor.cursor_shape,
1970 &snapshot.display_snapshot,
1971 true,
1972 true,
1973 )
1974 .head
1975 });
1976
1977 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1978 start_row..end_row,
1979 &active_rows,
1980 head_for_relative,
1981 is_singleton,
1982 &snapshot,
1983 cx,
1984 );
1985
1986 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1987
1988 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1989
1990 let mut max_visible_line_width = Pixels::ZERO;
1991 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1992 for line_with_invisibles in &line_layouts {
1993 if line_with_invisibles.line.width > max_visible_line_width {
1994 max_visible_line_width = line_with_invisibles.line.width;
1995 }
1996 }
1997
1998 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
1999 .unwrap()
2000 .width;
2001 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2002
2003 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2004 self.layout_blocks(
2005 start_row..end_row,
2006 &snapshot,
2007 bounds.size.width,
2008 scroll_width,
2009 gutter_padding,
2010 gutter_width,
2011 em_width,
2012 gutter_width + gutter_margin,
2013 line_height,
2014 &style,
2015 &line_layouts,
2016 editor,
2017 cx,
2018 )
2019 });
2020
2021 let scroll_max = point(
2022 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2023 max_row as f32,
2024 );
2025
2026 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2027
2028 let autoscrolled = if autoscroll_horizontally {
2029 editor.autoscroll_horizontally(
2030 start_row,
2031 text_size.width,
2032 scroll_width,
2033 em_width,
2034 &line_layouts,
2035 cx,
2036 )
2037 } else {
2038 false
2039 };
2040
2041 if clamped || autoscrolled {
2042 snapshot = editor.snapshot(cx);
2043 }
2044
2045 let mut context_menu = None;
2046 let mut code_actions_indicator = None;
2047 if let Some(newest_selection_head) = newest_selection_head {
2048 if (start_row..end_row).contains(&newest_selection_head.row()) {
2049 if editor.context_menu_visible() {
2050 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2051 context_menu =
2052 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2053 }
2054
2055 let active = matches!(
2056 editor.context_menu.read().as_ref(),
2057 Some(crate::ContextMenu::CodeActions(_))
2058 );
2059
2060 code_actions_indicator = editor
2061 .render_code_actions_indicator(&style, active, cx)
2062 .map(|element| CodeActionsIndicator {
2063 row: newest_selection_head.row(),
2064 button: element,
2065 });
2066 }
2067 }
2068
2069 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2070 let max_size = size(
2071 (120. * em_width) // Default size
2072 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2073 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2074 (16. * line_height) // Default size
2075 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2076 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2077 );
2078
2079 let mut hover = editor.hover_state.render(
2080 &snapshot,
2081 &style,
2082 visible_rows,
2083 max_size,
2084 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2085 cx,
2086 );
2087
2088 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2089 editor.render_fold_indicators(
2090 fold_statuses,
2091 &style,
2092 editor.gutter_hovered,
2093 line_height,
2094 gutter_margin,
2095 cx,
2096 )
2097 });
2098
2099 let invisible_symbol_font_size = font_size / 2.;
2100 let tab_invisible = cx
2101 .text_system()
2102 .shape_line(
2103 "→".into(),
2104 invisible_symbol_font_size,
2105 &[TextRun {
2106 len: "→".len(),
2107 font: self.style.text.font(),
2108 color: cx.theme().colors().editor_invisible,
2109 background_color: None,
2110 underline: None,
2111 }],
2112 )
2113 .unwrap();
2114 let space_invisible = cx
2115 .text_system()
2116 .shape_line(
2117 "•".into(),
2118 invisible_symbol_font_size,
2119 &[TextRun {
2120 len: "•".len(),
2121 font: self.style.text.font(),
2122 color: cx.theme().colors().editor_invisible,
2123 background_color: None,
2124 underline: None,
2125 }],
2126 )
2127 .unwrap();
2128
2129 LayoutState {
2130 mode: snapshot.mode,
2131 position_map: Arc::new(PositionMap {
2132 size: bounds.size,
2133 scroll_position: point(
2134 scroll_position.x * em_width,
2135 scroll_position.y * line_height,
2136 ),
2137 scroll_max,
2138 line_layouts,
2139 line_height,
2140 em_width,
2141 em_advance,
2142 snapshot,
2143 }),
2144 visible_anchor_range: start_anchor..end_anchor,
2145 visible_display_row_range: start_row..end_row,
2146 wrap_guides,
2147 gutter_size,
2148 gutter_padding,
2149 text_size,
2150 scrollbar_row_range,
2151 show_scrollbars,
2152 is_singleton,
2153 max_row,
2154 gutter_margin,
2155 active_rows,
2156 highlighted_rows,
2157 highlighted_ranges,
2158 line_numbers,
2159 display_hunks,
2160 blocks,
2161 selections,
2162 context_menu,
2163 code_actions_indicator,
2164 fold_indicators,
2165 tab_invisible,
2166 space_invisible,
2167 hover_popovers: hover,
2168 }
2169 })
2170 }
2171
2172 #[allow(clippy::too_many_arguments)]
2173 fn layout_blocks(
2174 &self,
2175 rows: Range<u32>,
2176 snapshot: &EditorSnapshot,
2177 editor_width: Pixels,
2178 scroll_width: Pixels,
2179 gutter_padding: Pixels,
2180 gutter_width: Pixels,
2181 em_width: Pixels,
2182 text_x: Pixels,
2183 line_height: Pixels,
2184 style: &EditorStyle,
2185 line_layouts: &[LineWithInvisibles],
2186 editor: &mut Editor,
2187 cx: &mut ViewContext<Editor>,
2188 ) -> (Pixels, Vec<BlockLayout>) {
2189 let mut block_id = 0;
2190 let scroll_x = snapshot.scroll_anchor.offset.x;
2191 let (fixed_blocks, non_fixed_blocks) = snapshot
2192 .blocks_in_range(rows.clone())
2193 .partition::<Vec<_>, _>(|(_, block)| match block {
2194 TransformBlock::ExcerptHeader { .. } => false,
2195 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2196 });
2197
2198 let mut render_block = |block: &TransformBlock,
2199 available_space: Size<AvailableSpace>,
2200 block_id: usize,
2201 editor: &mut Editor,
2202 cx: &mut ViewContext<Editor>| {
2203 let mut element = match block {
2204 TransformBlock::Custom(block) => {
2205 let align_to = block
2206 .position()
2207 .to_point(&snapshot.buffer_snapshot)
2208 .to_display_point(snapshot);
2209 let anchor_x = text_x
2210 + if rows.contains(&align_to.row()) {
2211 line_layouts[(align_to.row() - rows.start) as usize]
2212 .line
2213 .x_for_index(align_to.column() as usize)
2214 } else {
2215 layout_line(align_to.row(), snapshot, style, cx)
2216 .unwrap()
2217 .x_for_index(align_to.column() as usize)
2218 };
2219
2220 block.render(&mut BlockContext {
2221 view_context: cx,
2222 anchor_x,
2223 gutter_padding,
2224 line_height,
2225 gutter_width,
2226 em_width,
2227 block_id,
2228 editor_style: &self.style,
2229 })
2230 }
2231
2232 TransformBlock::ExcerptHeader {
2233 buffer,
2234 range,
2235 starts_new_buffer,
2236 ..
2237 } => {
2238 let include_root = editor
2239 .project
2240 .as_ref()
2241 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2242 .unwrap_or_default();
2243
2244 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2245 let jump_path = ProjectPath {
2246 worktree_id: file.worktree_id(cx),
2247 path: file.path.clone(),
2248 };
2249 let jump_anchor = range
2250 .primary
2251 .as_ref()
2252 .map_or(range.context.start, |primary| primary.start);
2253 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2254
2255 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2256 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2257 });
2258
2259 jump_handler
2260 });
2261
2262 let element = if *starts_new_buffer {
2263 let path = buffer.resolve_file_path(cx, include_root);
2264 let mut filename = None;
2265 let mut parent_path = None;
2266 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2267 if let Some(path) = path {
2268 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2269 parent_path = path
2270 .parent()
2271 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2272 }
2273
2274 let is_open = true;
2275
2276 div().id("path header container").size_full().p_1p5().child(
2277 h_stack()
2278 .id("path header block")
2279 .py_1p5()
2280 .pl_3()
2281 .pr_2()
2282 .rounded_lg()
2283 .shadow_md()
2284 .border()
2285 .border_color(cx.theme().colors().border)
2286 .bg(cx.theme().colors().editor_subheader_background)
2287 .justify_between()
2288 .cursor_pointer()
2289 .hover(|style| style.bg(cx.theme().colors().element_hover))
2290 .on_click(cx.listener(|_editor, _event, _cx| {
2291 // TODO: Implement collapsing path headers
2292 todo!("Clicking path header")
2293 }))
2294 .child(
2295 h_stack()
2296 .gap_3()
2297 // TODO: Add open/close state and toggle action
2298 .child(
2299 div().border().border_color(gpui::red()).child(
2300 ButtonLike::new("path-header-disclosure-control")
2301 .style(ButtonStyle::Subtle)
2302 .child(IconElement::new(match is_open {
2303 true => Icon::ChevronDown,
2304 false => Icon::ChevronRight,
2305 })),
2306 ),
2307 )
2308 .child(
2309 h_stack()
2310 .gap_2()
2311 .child(Label::new(
2312 filename
2313 .map(SharedString::from)
2314 .unwrap_or_else(|| "untitled".into()),
2315 ))
2316 .when_some(parent_path, |then, path| {
2317 then.child(Label::new(path).color(Color::Muted))
2318 }),
2319 ),
2320 )
2321 .children(jump_handler.map(|jump_handler| {
2322 IconButton::new(block_id, Icon::ArrowUpRight)
2323 .style(ButtonStyle::Subtle)
2324 .on_click(jump_handler)
2325 .tooltip(|cx| {
2326 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2327 })
2328 })), // .p_x(gutter_padding)
2329 )
2330 } else {
2331 let text_style = style.text.clone();
2332 h_stack()
2333 .id("collapsed context")
2334 .size_full()
2335 .gap(gutter_padding)
2336 .child(
2337 h_stack()
2338 .justify_end()
2339 .flex_none()
2340 .w(gutter_width - gutter_padding)
2341 .h_full()
2342 .text_buffer(cx)
2343 .text_color(cx.theme().colors().editor_line_number)
2344 .child("..."),
2345 )
2346 .map(|this| {
2347 if let Some(jump_handler) = jump_handler {
2348 this.child(
2349 ButtonLike::new("jump to collapsed context")
2350 .style(ButtonStyle::Transparent)
2351 .full_width()
2352 .on_click(jump_handler)
2353 .tooltip(|cx| {
2354 Tooltip::for_action(
2355 "Jump to Buffer",
2356 &OpenExcerpts,
2357 cx,
2358 )
2359 })
2360 .child(
2361 div()
2362 .h_px()
2363 .w_full()
2364 .bg(cx.theme().colors().border_variant)
2365 .group_hover("", |style| {
2366 style.bg(cx.theme().colors().border)
2367 }),
2368 ),
2369 )
2370 } else {
2371 this.child(div().size_full().bg(gpui::green()))
2372 }
2373 })
2374 // .child("⋯")
2375 // .children(jump_icon) // .p_x(gutter_padding)
2376 };
2377 element.into_any()
2378 }
2379 };
2380
2381 let size = element.measure(available_space, cx);
2382 (element, size)
2383 };
2384
2385 let mut fixed_block_max_width = Pixels::ZERO;
2386 let mut blocks = Vec::new();
2387 for (row, block) in fixed_blocks {
2388 let available_space = size(
2389 AvailableSpace::MinContent,
2390 AvailableSpace::Definite(block.height() as f32 * line_height),
2391 );
2392 let (element, element_size) =
2393 render_block(block, available_space, block_id, editor, cx);
2394 block_id += 1;
2395 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2396 blocks.push(BlockLayout {
2397 row,
2398 element,
2399 available_space,
2400 style: BlockStyle::Fixed,
2401 });
2402 }
2403 for (row, block) in non_fixed_blocks {
2404 let style = match block {
2405 TransformBlock::Custom(block) => block.style(),
2406 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2407 };
2408 let width = match style {
2409 BlockStyle::Sticky => editor_width,
2410 BlockStyle::Flex => editor_width
2411 .max(fixed_block_max_width)
2412 .max(gutter_width + scroll_width),
2413 BlockStyle::Fixed => unreachable!(),
2414 };
2415 let available_space = size(
2416 AvailableSpace::Definite(width),
2417 AvailableSpace::Definite(block.height() as f32 * line_height),
2418 );
2419 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2420 block_id += 1;
2421 blocks.push(BlockLayout {
2422 row,
2423 element,
2424 available_space,
2425 style,
2426 });
2427 }
2428 (
2429 scroll_width.max(fixed_block_max_width - gutter_width),
2430 blocks,
2431 )
2432 }
2433
2434 fn paint_mouse_listeners(
2435 &mut self,
2436 bounds: Bounds<Pixels>,
2437 gutter_bounds: Bounds<Pixels>,
2438 text_bounds: Bounds<Pixels>,
2439 layout: &LayoutState,
2440 cx: &mut WindowContext,
2441 ) {
2442 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2443 let interactive_bounds = InteractiveBounds {
2444 bounds: bounds.intersect(&cx.content_mask().bounds),
2445 stacking_order: cx.stacking_order().clone(),
2446 };
2447
2448 cx.on_mouse_event({
2449 let position_map = layout.position_map.clone();
2450 let editor = self.editor.clone();
2451 let interactive_bounds = interactive_bounds.clone();
2452
2453 move |event: &ScrollWheelEvent, phase, cx| {
2454 if phase != DispatchPhase::Bubble {
2455 return;
2456 }
2457
2458 editor.update(cx, |editor, cx| {
2459 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2460 });
2461 }
2462 });
2463
2464 cx.on_mouse_event({
2465 let position_map = layout.position_map.clone();
2466 let editor = self.editor.clone();
2467 let stacking_order = cx.stacking_order().clone();
2468
2469 move |event: &MouseDownEvent, phase, cx| {
2470 if phase != DispatchPhase::Bubble {
2471 return;
2472 }
2473
2474 match event.button {
2475 MouseButton::Left => editor.update(cx, |editor, cx| {
2476 Self::mouse_left_down(
2477 editor,
2478 event,
2479 &position_map,
2480 text_bounds,
2481 gutter_bounds,
2482 &stacking_order,
2483 cx,
2484 );
2485 }),
2486 MouseButton::Right => editor.update(cx, |editor, cx| {
2487 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2488 }),
2489 _ => {}
2490 };
2491 }
2492 });
2493
2494 cx.on_mouse_event({
2495 let position_map = layout.position_map.clone();
2496 let editor = self.editor.clone();
2497 let stacking_order = cx.stacking_order().clone();
2498
2499 move |event: &MouseUpEvent, phase, cx| {
2500 editor.update(cx, |editor, cx| {
2501 Self::mouse_up(
2502 editor,
2503 event,
2504 &position_map,
2505 text_bounds,
2506 &stacking_order,
2507 cx,
2508 )
2509 });
2510 }
2511 });
2512 cx.on_mouse_event({
2513 let position_map = layout.position_map.clone();
2514 let editor = self.editor.clone();
2515 let stacking_order = cx.stacking_order().clone();
2516
2517 move |event: &MouseMoveEvent, phase, cx| {
2518 if phase != DispatchPhase::Bubble {
2519 return;
2520 }
2521
2522 editor.update(cx, |editor, cx| {
2523 Self::mouse_moved(
2524 editor,
2525 event,
2526 &position_map,
2527 text_bounds,
2528 gutter_bounds,
2529 &stacking_order,
2530 cx,
2531 )
2532 });
2533 }
2534 });
2535 }
2536}
2537
2538#[derive(Debug)]
2539pub struct LineWithInvisibles {
2540 pub line: ShapedLine,
2541 invisibles: Vec<Invisible>,
2542}
2543
2544impl LineWithInvisibles {
2545 fn from_chunks<'a>(
2546 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2547 text_style: &TextStyle,
2548 max_line_len: usize,
2549 max_line_count: usize,
2550 line_number_layouts: &[Option<ShapedLine>],
2551 editor_mode: EditorMode,
2552 cx: &WindowContext,
2553 ) -> Vec<Self> {
2554 let mut layouts = Vec::with_capacity(max_line_count);
2555 let mut line = String::new();
2556 let mut invisibles = Vec::new();
2557 let mut styles = Vec::new();
2558 let mut non_whitespace_added = false;
2559 let mut row = 0;
2560 let mut line_exceeded_max_len = false;
2561 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2562
2563 for highlighted_chunk in chunks.chain([HighlightedChunk {
2564 chunk: "\n",
2565 style: None,
2566 is_tab: false,
2567 }]) {
2568 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2569 if ix > 0 {
2570 let shaped_line = cx
2571 .text_system()
2572 .shape_line(line.clone().into(), font_size, &styles)
2573 .unwrap();
2574 layouts.push(Self {
2575 line: shaped_line,
2576 invisibles: invisibles.drain(..).collect(),
2577 });
2578
2579 line.clear();
2580 styles.clear();
2581 row += 1;
2582 line_exceeded_max_len = false;
2583 non_whitespace_added = false;
2584 if row == max_line_count {
2585 return layouts;
2586 }
2587 }
2588
2589 if !line_chunk.is_empty() && !line_exceeded_max_len {
2590 let text_style = if let Some(style) = highlighted_chunk.style {
2591 Cow::Owned(text_style.clone().highlight(style))
2592 } else {
2593 Cow::Borrowed(text_style)
2594 };
2595
2596 if line.len() + line_chunk.len() > max_line_len {
2597 let mut chunk_len = max_line_len - line.len();
2598 while !line_chunk.is_char_boundary(chunk_len) {
2599 chunk_len -= 1;
2600 }
2601 line_chunk = &line_chunk[..chunk_len];
2602 line_exceeded_max_len = true;
2603 }
2604
2605 styles.push(TextRun {
2606 len: line_chunk.len(),
2607 font: text_style.font(),
2608 color: text_style.color,
2609 background_color: text_style.background_color,
2610 underline: text_style.underline,
2611 });
2612
2613 if editor_mode == EditorMode::Full {
2614 // Line wrap pads its contents with fake whitespaces,
2615 // avoid printing them
2616 let inside_wrapped_string = line_number_layouts
2617 .get(row)
2618 .and_then(|layout| layout.as_ref())
2619 .is_none();
2620 if highlighted_chunk.is_tab {
2621 if non_whitespace_added || !inside_wrapped_string {
2622 invisibles.push(Invisible::Tab {
2623 line_start_offset: line.len(),
2624 });
2625 }
2626 } else {
2627 invisibles.extend(
2628 line_chunk
2629 .chars()
2630 .enumerate()
2631 .filter(|(_, line_char)| {
2632 let is_whitespace = line_char.is_whitespace();
2633 non_whitespace_added |= !is_whitespace;
2634 is_whitespace
2635 && (non_whitespace_added || !inside_wrapped_string)
2636 })
2637 .map(|(whitespace_index, _)| Invisible::Whitespace {
2638 line_offset: line.len() + whitespace_index,
2639 }),
2640 )
2641 }
2642 }
2643
2644 line.push_str(line_chunk);
2645 }
2646 }
2647 }
2648
2649 layouts
2650 }
2651
2652 fn draw(
2653 &self,
2654 layout: &LayoutState,
2655 row: u32,
2656 content_origin: gpui::Point<Pixels>,
2657 whitespace_setting: ShowWhitespaceSetting,
2658 selection_ranges: &[Range<DisplayPoint>],
2659 cx: &mut WindowContext,
2660 ) {
2661 let line_height = layout.position_map.line_height;
2662 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2663
2664 self.line.paint(
2665 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2666 line_height,
2667 cx,
2668 );
2669
2670 self.draw_invisibles(
2671 &selection_ranges,
2672 layout,
2673 content_origin,
2674 line_y,
2675 row,
2676 line_height,
2677 whitespace_setting,
2678 cx,
2679 );
2680 }
2681
2682 fn draw_invisibles(
2683 &self,
2684 selection_ranges: &[Range<DisplayPoint>],
2685 layout: &LayoutState,
2686 content_origin: gpui::Point<Pixels>,
2687 line_y: Pixels,
2688 row: u32,
2689 line_height: Pixels,
2690 whitespace_setting: ShowWhitespaceSetting,
2691 cx: &mut WindowContext,
2692 ) {
2693 let allowed_invisibles_regions = match whitespace_setting {
2694 ShowWhitespaceSetting::None => return,
2695 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2696 ShowWhitespaceSetting::All => None,
2697 };
2698
2699 for invisible in &self.invisibles {
2700 let (&token_offset, invisible_symbol) = match invisible {
2701 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2702 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2703 };
2704
2705 let x_offset = self.line.x_for_index(token_offset);
2706 let invisible_offset =
2707 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2708 let origin = content_origin
2709 + gpui::point(
2710 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2711 line_y,
2712 );
2713
2714 if let Some(allowed_regions) = allowed_invisibles_regions {
2715 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2716 if !allowed_regions
2717 .iter()
2718 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2719 {
2720 continue;
2721 }
2722 }
2723 invisible_symbol.paint(origin, line_height, cx);
2724 }
2725 }
2726}
2727
2728#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2729enum Invisible {
2730 Tab { line_start_offset: usize },
2731 Whitespace { line_offset: usize },
2732}
2733
2734impl Element for EditorElement {
2735 type State = ();
2736
2737 fn layout(
2738 &mut self,
2739 element_state: Option<Self::State>,
2740 cx: &mut gpui::WindowContext,
2741 ) -> (gpui::LayoutId, Self::State) {
2742 self.editor.update(cx, |editor, cx| {
2743 editor.set_style(self.style.clone(), cx);
2744
2745 let layout_id = match editor.mode {
2746 EditorMode::SingleLine => {
2747 let rem_size = cx.rem_size();
2748 let mut style = Style::default();
2749 style.size.width = relative(1.).into();
2750 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2751 cx.request_layout(&style, None)
2752 }
2753 EditorMode::AutoHeight { max_lines } => {
2754 let editor_handle = cx.view().clone();
2755 let max_line_number_width =
2756 self.max_line_number_width(&editor.snapshot(cx), cx);
2757 cx.request_measured_layout(
2758 Style::default(),
2759 move |known_dimensions, available_space, cx| {
2760 editor_handle
2761 .update(cx, |editor, cx| {
2762 compute_auto_height_layout(
2763 editor,
2764 max_lines,
2765 max_line_number_width,
2766 known_dimensions,
2767 cx,
2768 )
2769 })
2770 .unwrap_or_default()
2771 },
2772 )
2773 }
2774 EditorMode::Full => {
2775 let mut style = Style::default();
2776 style.size.width = relative(1.).into();
2777 style.size.height = relative(1.).into();
2778 cx.request_layout(&style, None)
2779 }
2780 };
2781
2782 (layout_id, ())
2783 })
2784 }
2785
2786 fn paint(
2787 mut self,
2788 bounds: Bounds<gpui::Pixels>,
2789 element_state: &mut Self::State,
2790 cx: &mut gpui::WindowContext,
2791 ) {
2792 let editor = self.editor.clone();
2793
2794 let mut layout = self.compute_layout(bounds, cx);
2795 let gutter_bounds = Bounds {
2796 origin: bounds.origin,
2797 size: layout.gutter_size,
2798 };
2799 let text_bounds = Bounds {
2800 origin: gutter_bounds.upper_right(),
2801 size: layout.text_size,
2802 };
2803
2804 let focus_handle = editor.focus_handle(cx);
2805 let key_context = self.editor.read(cx).key_context(cx);
2806 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2807 self.register_actions(cx);
2808 self.register_key_listeners(cx);
2809
2810 // We call with_z_index to establish a new stacking context.
2811 cx.with_z_index(0, |cx| {
2812 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2813 // Paint mouse listeners at z-index 0 so any elements we paint on top of the editor
2814 // take precedence.
2815 cx.with_z_index(0, |cx| {
2816 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2817 });
2818 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2819 cx.handle_input(&focus_handle, input_handler);
2820
2821 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2822 if layout.gutter_size.width > Pixels::ZERO {
2823 self.paint_gutter(gutter_bounds, &mut layout, cx);
2824 }
2825 self.paint_text(text_bounds, &mut layout, cx);
2826
2827 if !layout.blocks.is_empty() {
2828 // z-index of 0 so that it is on the same mouse event layer as the editor's
2829 // mouse events
2830 cx.with_z_index(0, |cx| {
2831 cx.with_element_id(Some("editor_blocks"), |cx| {
2832 self.paint_blocks(bounds, &mut layout, cx);
2833 });
2834 })
2835 }
2836
2837 cx.with_z_index(1, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2838 });
2839 });
2840 })
2841 }
2842}
2843
2844impl IntoElement for EditorElement {
2845 type Element = Self;
2846
2847 fn element_id(&self) -> Option<gpui::ElementId> {
2848 self.editor.element_id()
2849 }
2850
2851 fn into_element(self) -> Self::Element {
2852 self
2853 }
2854}
2855
2856type BufferRow = u32;
2857
2858pub struct LayoutState {
2859 position_map: Arc<PositionMap>,
2860 gutter_size: Size<Pixels>,
2861 gutter_padding: Pixels,
2862 gutter_margin: Pixels,
2863 text_size: gpui::Size<Pixels>,
2864 mode: EditorMode,
2865 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2866 visible_anchor_range: Range<Anchor>,
2867 visible_display_row_range: Range<u32>,
2868 active_rows: BTreeMap<u32, bool>,
2869 highlighted_rows: Option<Range<u32>>,
2870 line_numbers: Vec<Option<ShapedLine>>,
2871 display_hunks: Vec<DisplayDiffHunk>,
2872 blocks: Vec<BlockLayout>,
2873 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2874 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2875 scrollbar_row_range: Range<f32>,
2876 show_scrollbars: bool,
2877 is_singleton: bool,
2878 max_row: u32,
2879 context_menu: Option<(DisplayPoint, AnyElement)>,
2880 code_actions_indicator: Option<CodeActionsIndicator>,
2881 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2882 fold_indicators: Vec<Option<IconButton>>,
2883 tab_invisible: ShapedLine,
2884 space_invisible: ShapedLine,
2885}
2886
2887struct CodeActionsIndicator {
2888 row: u32,
2889 button: IconButton,
2890}
2891
2892struct PositionMap {
2893 size: Size<Pixels>,
2894 line_height: Pixels,
2895 scroll_position: gpui::Point<Pixels>,
2896 scroll_max: gpui::Point<f32>,
2897 em_width: Pixels,
2898 em_advance: Pixels,
2899 line_layouts: Vec<LineWithInvisibles>,
2900 snapshot: EditorSnapshot,
2901}
2902
2903#[derive(Debug, Copy, Clone)]
2904pub struct PointForPosition {
2905 pub previous_valid: DisplayPoint,
2906 pub next_valid: DisplayPoint,
2907 pub exact_unclipped: DisplayPoint,
2908 pub column_overshoot_after_line_end: u32,
2909}
2910
2911impl PointForPosition {
2912 #[cfg(test)]
2913 pub fn valid(valid: DisplayPoint) -> Self {
2914 Self {
2915 previous_valid: valid,
2916 next_valid: valid,
2917 exact_unclipped: valid,
2918 column_overshoot_after_line_end: 0,
2919 }
2920 }
2921
2922 pub fn as_valid(&self) -> Option<DisplayPoint> {
2923 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2924 Some(self.previous_valid)
2925 } else {
2926 None
2927 }
2928 }
2929}
2930
2931impl PositionMap {
2932 fn point_for_position(
2933 &self,
2934 text_bounds: Bounds<Pixels>,
2935 position: gpui::Point<Pixels>,
2936 ) -> PointForPosition {
2937 let scroll_position = self.snapshot.scroll_position();
2938 let position = position - text_bounds.origin;
2939 let y = position.y.max(px(0.)).min(self.size.height);
2940 let x = position.x + (scroll_position.x * self.em_width);
2941 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2942
2943 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2944 .line_layouts
2945 .get(row as usize - scroll_position.y as usize)
2946 .map(|&LineWithInvisibles { ref line, .. }| line)
2947 {
2948 if let Some(ix) = line.index_for_x(x) {
2949 (ix as u32, px(0.))
2950 } else {
2951 (line.len as u32, px(0.).max(x - line.width))
2952 }
2953 } else {
2954 (0, x)
2955 };
2956
2957 let mut exact_unclipped = DisplayPoint::new(row, column);
2958 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2959 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2960
2961 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2962 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2963 PointForPosition {
2964 previous_valid,
2965 next_valid,
2966 exact_unclipped,
2967 column_overshoot_after_line_end,
2968 }
2969 }
2970}
2971
2972struct BlockLayout {
2973 row: u32,
2974 element: AnyElement,
2975 available_space: Size<AvailableSpace>,
2976 style: BlockStyle,
2977}
2978
2979fn layout_line(
2980 row: u32,
2981 snapshot: &EditorSnapshot,
2982 style: &EditorStyle,
2983 cx: &WindowContext,
2984) -> Result<ShapedLine> {
2985 let mut line = snapshot.line(row);
2986
2987 if line.len() > MAX_LINE_LEN {
2988 let mut len = MAX_LINE_LEN;
2989 while !line.is_char_boundary(len) {
2990 len -= 1;
2991 }
2992
2993 line.truncate(len);
2994 }
2995
2996 cx.text_system().shape_line(
2997 line.into(),
2998 style.text.font_size.to_pixels(cx.rem_size()),
2999 &[TextRun {
3000 len: snapshot.line_len(row) as usize,
3001 font: style.text.font(),
3002 color: Hsla::default(),
3003 background_color: None,
3004 underline: None,
3005 }],
3006 )
3007}
3008
3009#[derive(Debug)]
3010pub struct Cursor {
3011 origin: gpui::Point<Pixels>,
3012 block_width: Pixels,
3013 line_height: Pixels,
3014 color: Hsla,
3015 shape: CursorShape,
3016 block_text: Option<ShapedLine>,
3017}
3018
3019impl Cursor {
3020 pub fn new(
3021 origin: gpui::Point<Pixels>,
3022 block_width: Pixels,
3023 line_height: Pixels,
3024 color: Hsla,
3025 shape: CursorShape,
3026 block_text: Option<ShapedLine>,
3027 ) -> Cursor {
3028 Cursor {
3029 origin,
3030 block_width,
3031 line_height,
3032 color,
3033 shape,
3034 block_text,
3035 }
3036 }
3037
3038 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3039 Bounds {
3040 origin: self.origin + origin,
3041 size: size(self.block_width, self.line_height),
3042 }
3043 }
3044
3045 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3046 let bounds = match self.shape {
3047 CursorShape::Bar => Bounds {
3048 origin: self.origin + origin,
3049 size: size(px(2.0), self.line_height),
3050 },
3051 CursorShape::Block | CursorShape::Hollow => Bounds {
3052 origin: self.origin + origin,
3053 size: size(self.block_width, self.line_height),
3054 },
3055 CursorShape::Underscore => Bounds {
3056 origin: self.origin
3057 + origin
3058 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3059 size: size(self.block_width, px(2.0)),
3060 },
3061 };
3062
3063 //Draw background or border quad
3064 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3065 outline(bounds, self.color)
3066 } else {
3067 fill(bounds, self.color)
3068 };
3069
3070 cx.paint_quad(cursor);
3071
3072 if let Some(block_text) = &self.block_text {
3073 block_text.paint(self.origin + origin, self.line_height, cx);
3074 }
3075 }
3076
3077 pub fn shape(&self) -> CursorShape {
3078 self.shape
3079 }
3080}
3081
3082#[derive(Debug)]
3083pub struct HighlightedRange {
3084 pub start_y: Pixels,
3085 pub line_height: Pixels,
3086 pub lines: Vec<HighlightedRangeLine>,
3087 pub color: Hsla,
3088 pub corner_radius: Pixels,
3089}
3090
3091#[derive(Debug)]
3092pub struct HighlightedRangeLine {
3093 pub start_x: Pixels,
3094 pub end_x: Pixels,
3095}
3096
3097impl HighlightedRange {
3098 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3099 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3100 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3101 self.paint_lines(
3102 self.start_y + self.line_height,
3103 &self.lines[1..],
3104 bounds,
3105 cx,
3106 );
3107 } else {
3108 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3109 }
3110 }
3111
3112 fn paint_lines(
3113 &self,
3114 start_y: Pixels,
3115 lines: &[HighlightedRangeLine],
3116 bounds: Bounds<Pixels>,
3117 cx: &mut WindowContext,
3118 ) {
3119 if lines.is_empty() {
3120 return;
3121 }
3122
3123 let first_line = lines.first().unwrap();
3124 let last_line = lines.last().unwrap();
3125
3126 let first_top_left = point(first_line.start_x, start_y);
3127 let first_top_right = point(first_line.end_x, start_y);
3128
3129 let curve_height = point(Pixels::ZERO, self.corner_radius);
3130 let curve_width = |start_x: Pixels, end_x: Pixels| {
3131 let max = (end_x - start_x) / 2.;
3132 let width = if max < self.corner_radius {
3133 max
3134 } else {
3135 self.corner_radius
3136 };
3137
3138 point(width, Pixels::ZERO)
3139 };
3140
3141 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3142 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3143 path.curve_to(first_top_right + curve_height, first_top_right);
3144
3145 let mut iter = lines.iter().enumerate().peekable();
3146 while let Some((ix, line)) = iter.next() {
3147 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3148
3149 if let Some((_, next_line)) = iter.peek() {
3150 let next_top_right = point(next_line.end_x, bottom_right.y);
3151
3152 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3153 Ordering::Equal => {
3154 path.line_to(bottom_right);
3155 }
3156 Ordering::Less => {
3157 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3158 path.line_to(bottom_right - curve_height);
3159 if self.corner_radius > Pixels::ZERO {
3160 path.curve_to(bottom_right - curve_width, bottom_right);
3161 }
3162 path.line_to(next_top_right + curve_width);
3163 if self.corner_radius > Pixels::ZERO {
3164 path.curve_to(next_top_right + curve_height, next_top_right);
3165 }
3166 }
3167 Ordering::Greater => {
3168 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3169 path.line_to(bottom_right - curve_height);
3170 if self.corner_radius > Pixels::ZERO {
3171 path.curve_to(bottom_right + curve_width, bottom_right);
3172 }
3173 path.line_to(next_top_right - curve_width);
3174 if self.corner_radius > Pixels::ZERO {
3175 path.curve_to(next_top_right + curve_height, next_top_right);
3176 }
3177 }
3178 }
3179 } else {
3180 let curve_width = curve_width(line.start_x, line.end_x);
3181 path.line_to(bottom_right - curve_height);
3182 if self.corner_radius > Pixels::ZERO {
3183 path.curve_to(bottom_right - curve_width, bottom_right);
3184 }
3185
3186 let bottom_left = point(line.start_x, bottom_right.y);
3187 path.line_to(bottom_left + curve_width);
3188 if self.corner_radius > Pixels::ZERO {
3189 path.curve_to(bottom_left - curve_height, bottom_left);
3190 }
3191 }
3192 }
3193
3194 if first_line.start_x > last_line.start_x {
3195 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3196 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3197 path.line_to(second_top_left + curve_height);
3198 if self.corner_radius > Pixels::ZERO {
3199 path.curve_to(second_top_left + curve_width, second_top_left);
3200 }
3201 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3202 path.line_to(first_bottom_left - curve_width);
3203 if self.corner_radius > Pixels::ZERO {
3204 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3205 }
3206 }
3207
3208 path.line_to(first_top_left + curve_height);
3209 if self.corner_radius > Pixels::ZERO {
3210 path.curve_to(first_top_left + top_curve_width, first_top_left);
3211 }
3212 path.line_to(first_top_right - top_curve_width);
3213
3214 cx.paint_path(path, self.color);
3215 }
3216}
3217
3218pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3219 (delta.pow(1.5) / 100.0).into()
3220}
3221
3222fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3223 (delta.pow(1.2) / 300.0).into()
3224}
3225
3226#[cfg(test)]
3227mod tests {
3228 use super::*;
3229 use crate::{
3230 display_map::{BlockDisposition, BlockProperties},
3231 editor_tests::{init_test, update_test_language_settings},
3232 Editor, MultiBuffer,
3233 };
3234 use gpui::{EmptyView, TestAppContext};
3235 use language::language_settings;
3236 use log::info;
3237 use std::{num::NonZeroU32, sync::Arc};
3238 use util::test::sample_text;
3239
3240 #[gpui::test]
3241 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3242 init_test(cx, |_| {});
3243 let window = cx.add_window(|cx| {
3244 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3245 Editor::new(EditorMode::Full, buffer, None, cx)
3246 });
3247
3248 let editor = window.root(cx).unwrap();
3249 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3250 let element = EditorElement::new(&editor, style);
3251
3252 let layouts = window
3253 .update(cx, |editor, cx| {
3254 let snapshot = editor.snapshot(cx);
3255 element
3256 .shape_line_numbers(
3257 0..6,
3258 &Default::default(),
3259 DisplayPoint::new(0, 0),
3260 false,
3261 &snapshot,
3262 cx,
3263 )
3264 .0
3265 })
3266 .unwrap();
3267 assert_eq!(layouts.len(), 6);
3268
3269 let relative_rows = window
3270 .update(cx, |editor, cx| {
3271 let snapshot = editor.snapshot(cx);
3272 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3273 })
3274 .unwrap();
3275 assert_eq!(relative_rows[&0], 3);
3276 assert_eq!(relative_rows[&1], 2);
3277 assert_eq!(relative_rows[&2], 1);
3278 // current line has no relative number
3279 assert_eq!(relative_rows[&4], 1);
3280 assert_eq!(relative_rows[&5], 2);
3281
3282 // works if cursor is before screen
3283 let relative_rows = window
3284 .update(cx, |editor, cx| {
3285 let snapshot = editor.snapshot(cx);
3286
3287 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3288 })
3289 .unwrap();
3290 assert_eq!(relative_rows.len(), 3);
3291 assert_eq!(relative_rows[&3], 2);
3292 assert_eq!(relative_rows[&4], 3);
3293 assert_eq!(relative_rows[&5], 4);
3294
3295 // works if cursor is after screen
3296 let relative_rows = window
3297 .update(cx, |editor, cx| {
3298 let snapshot = editor.snapshot(cx);
3299
3300 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3301 })
3302 .unwrap();
3303 assert_eq!(relative_rows.len(), 3);
3304 assert_eq!(relative_rows[&0], 5);
3305 assert_eq!(relative_rows[&1], 4);
3306 assert_eq!(relative_rows[&2], 3);
3307 }
3308
3309 #[gpui::test]
3310 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3311 init_test(cx, |_| {});
3312
3313 let window = cx.add_window(|cx| {
3314 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3315 Editor::new(EditorMode::Full, buffer, None, cx)
3316 });
3317 let editor = window.root(cx).unwrap();
3318 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3319 let mut element = EditorElement::new(&editor, style);
3320
3321 window
3322 .update(cx, |editor, cx| {
3323 editor.cursor_shape = CursorShape::Block;
3324 editor.change_selections(None, cx, |s| {
3325 s.select_ranges([
3326 Point::new(0, 0)..Point::new(1, 0),
3327 Point::new(3, 2)..Point::new(3, 3),
3328 Point::new(5, 6)..Point::new(6, 0),
3329 ]);
3330 });
3331 })
3332 .unwrap();
3333 let state = cx
3334 .update_window(window.into(), |_, cx| {
3335 element.compute_layout(
3336 Bounds {
3337 origin: point(px(500.), px(500.)),
3338 size: size(px(500.), px(500.)),
3339 },
3340 cx,
3341 )
3342 })
3343 .unwrap();
3344
3345 assert_eq!(state.selections.len(), 1);
3346 let local_selections = &state.selections[0].1;
3347 assert_eq!(local_selections.len(), 3);
3348 // moves cursor back one line
3349 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3350 assert_eq!(
3351 local_selections[0].range,
3352 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3353 );
3354
3355 // moves cursor back one column
3356 assert_eq!(
3357 local_selections[1].range,
3358 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3359 );
3360 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3361
3362 // leaves cursor on the max point
3363 assert_eq!(
3364 local_selections[2].range,
3365 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3366 );
3367 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3368
3369 // active lines does not include 1 (even though the range of the selection does)
3370 assert_eq!(
3371 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3372 vec![0, 3, 5, 6]
3373 );
3374
3375 // multi-buffer support
3376 // in DisplayPoint co-ordinates, this is what we're dealing with:
3377 // 0: [[file
3378 // 1: header]]
3379 // 2: aaaaaa
3380 // 3: bbbbbb
3381 // 4: cccccc
3382 // 5:
3383 // 6: ...
3384 // 7: ffffff
3385 // 8: gggggg
3386 // 9: hhhhhh
3387 // 10:
3388 // 11: [[file
3389 // 12: header]]
3390 // 13: bbbbbb
3391 // 14: cccccc
3392 // 15: dddddd
3393 let window = cx.add_window(|cx| {
3394 let buffer = MultiBuffer::build_multi(
3395 [
3396 (
3397 &(sample_text(8, 6, 'a') + "\n"),
3398 vec![
3399 Point::new(0, 0)..Point::new(3, 0),
3400 Point::new(4, 0)..Point::new(7, 0),
3401 ],
3402 ),
3403 (
3404 &(sample_text(8, 6, 'a') + "\n"),
3405 vec![Point::new(1, 0)..Point::new(3, 0)],
3406 ),
3407 ],
3408 cx,
3409 );
3410 Editor::new(EditorMode::Full, buffer, None, cx)
3411 });
3412 let editor = window.root(cx).unwrap();
3413 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3414 let mut element = EditorElement::new(&editor, style);
3415 let state = window.update(cx, |editor, cx| {
3416 editor.cursor_shape = CursorShape::Block;
3417 editor.change_selections(None, cx, |s| {
3418 s.select_display_ranges([
3419 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3420 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3421 ]);
3422 });
3423 });
3424
3425 let state = cx
3426 .update_window(window.into(), |_, cx| {
3427 element.compute_layout(
3428 Bounds {
3429 origin: point(px(500.), px(500.)),
3430 size: size(px(500.), px(500.)),
3431 },
3432 cx,
3433 )
3434 })
3435 .unwrap();
3436 assert_eq!(state.selections.len(), 1);
3437 let local_selections = &state.selections[0].1;
3438 assert_eq!(local_selections.len(), 2);
3439
3440 // moves cursor on excerpt boundary back a line
3441 // and doesn't allow selection to bleed through
3442 assert_eq!(
3443 local_selections[0].range,
3444 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3445 );
3446 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3447 // moves cursor on buffer boundary back two lines
3448 // and doesn't allow selection to bleed through
3449 assert_eq!(
3450 local_selections[1].range,
3451 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3452 );
3453 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3454 }
3455
3456 #[gpui::test]
3457 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3458 init_test(cx, |_| {});
3459
3460 let window = cx.add_window(|cx| {
3461 let buffer = MultiBuffer::build_simple("", cx);
3462 Editor::new(EditorMode::Full, buffer, None, cx)
3463 });
3464 let editor = window.root(cx).unwrap();
3465 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3466 window
3467 .update(cx, |editor, cx| {
3468 editor.set_placeholder_text("hello", cx);
3469 editor.insert_blocks(
3470 [BlockProperties {
3471 style: BlockStyle::Fixed,
3472 disposition: BlockDisposition::Above,
3473 height: 3,
3474 position: Anchor::min(),
3475 render: Arc::new(|_| div().into_any()),
3476 }],
3477 None,
3478 cx,
3479 );
3480
3481 // Blur the editor so that it displays placeholder text.
3482 cx.blur();
3483 })
3484 .unwrap();
3485
3486 let mut element = EditorElement::new(&editor, style);
3487 let mut state = cx
3488 .update_window(window.into(), |_, cx| {
3489 element.compute_layout(
3490 Bounds {
3491 origin: point(px(500.), px(500.)),
3492 size: size(px(500.), px(500.)),
3493 },
3494 cx,
3495 )
3496 })
3497 .unwrap();
3498 let size = state.position_map.size;
3499
3500 assert_eq!(state.position_map.line_layouts.len(), 4);
3501 assert_eq!(
3502 state
3503 .line_numbers
3504 .iter()
3505 .map(Option::is_some)
3506 .collect::<Vec<_>>(),
3507 &[false, false, false, true]
3508 );
3509
3510 // Don't panic.
3511 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3512 cx.update_window(window.into(), |_, cx| {
3513 element.paint(bounds, &mut (), cx);
3514 })
3515 .unwrap()
3516 }
3517
3518 #[gpui::test]
3519 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3520 const TAB_SIZE: u32 = 4;
3521
3522 let input_text = "\t \t|\t| a b";
3523 let expected_invisibles = vec![
3524 Invisible::Tab {
3525 line_start_offset: 0,
3526 },
3527 Invisible::Whitespace {
3528 line_offset: TAB_SIZE as usize,
3529 },
3530 Invisible::Tab {
3531 line_start_offset: TAB_SIZE as usize + 1,
3532 },
3533 Invisible::Tab {
3534 line_start_offset: TAB_SIZE as usize * 2 + 1,
3535 },
3536 Invisible::Whitespace {
3537 line_offset: TAB_SIZE as usize * 3 + 1,
3538 },
3539 Invisible::Whitespace {
3540 line_offset: TAB_SIZE as usize * 3 + 3,
3541 },
3542 ];
3543 assert_eq!(
3544 expected_invisibles.len(),
3545 input_text
3546 .chars()
3547 .filter(|initial_char| initial_char.is_whitespace())
3548 .count(),
3549 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3550 );
3551
3552 init_test(cx, |s| {
3553 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3554 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3555 });
3556
3557 let actual_invisibles =
3558 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3559
3560 assert_eq!(expected_invisibles, actual_invisibles);
3561 }
3562
3563 #[gpui::test]
3564 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3565 init_test(cx, |s| {
3566 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3567 s.defaults.tab_size = NonZeroU32::new(4);
3568 });
3569
3570 for editor_mode_without_invisibles in [
3571 EditorMode::SingleLine,
3572 EditorMode::AutoHeight { max_lines: 100 },
3573 ] {
3574 let invisibles = collect_invisibles_from_new_editor(
3575 cx,
3576 editor_mode_without_invisibles,
3577 "\t\t\t| | a b",
3578 px(500.0),
3579 );
3580 assert!(invisibles.is_empty(),
3581 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3582 }
3583 }
3584
3585 #[gpui::test]
3586 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3587 let tab_size = 4;
3588 let input_text = "a\tbcd ".repeat(9);
3589 let repeated_invisibles = [
3590 Invisible::Tab {
3591 line_start_offset: 1,
3592 },
3593 Invisible::Whitespace {
3594 line_offset: tab_size as usize + 3,
3595 },
3596 Invisible::Whitespace {
3597 line_offset: tab_size as usize + 4,
3598 },
3599 Invisible::Whitespace {
3600 line_offset: tab_size as usize + 5,
3601 },
3602 ];
3603 let expected_invisibles = std::iter::once(repeated_invisibles)
3604 .cycle()
3605 .take(9)
3606 .flatten()
3607 .collect::<Vec<_>>();
3608 assert_eq!(
3609 expected_invisibles.len(),
3610 input_text
3611 .chars()
3612 .filter(|initial_char| initial_char.is_whitespace())
3613 .count(),
3614 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3615 );
3616 info!("Expected invisibles: {expected_invisibles:?}");
3617
3618 init_test(cx, |_| {});
3619
3620 // Put the same string with repeating whitespace pattern into editors of various size,
3621 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3622 let resize_step = 10.0;
3623 let mut editor_width = 200.0;
3624 while editor_width <= 1000.0 {
3625 update_test_language_settings(cx, |s| {
3626 s.defaults.tab_size = NonZeroU32::new(tab_size);
3627 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3628 s.defaults.preferred_line_length = Some(editor_width as u32);
3629 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3630 });
3631
3632 let actual_invisibles = collect_invisibles_from_new_editor(
3633 cx,
3634 EditorMode::Full,
3635 &input_text,
3636 px(editor_width),
3637 );
3638
3639 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3640 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3641 let mut i = 0;
3642 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3643 i = actual_index;
3644 match expected_invisibles.get(i) {
3645 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3646 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3647 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3648 _ => {
3649 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3650 }
3651 },
3652 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3653 }
3654 }
3655 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3656 assert!(
3657 missing_expected_invisibles.is_empty(),
3658 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3659 );
3660
3661 editor_width += resize_step;
3662 }
3663 }
3664
3665 fn collect_invisibles_from_new_editor(
3666 cx: &mut TestAppContext,
3667 editor_mode: EditorMode,
3668 input_text: &str,
3669 editor_width: Pixels,
3670 ) -> Vec<Invisible> {
3671 info!(
3672 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3673 editor_width.0
3674 );
3675 let window = cx.add_window(|cx| {
3676 let buffer = MultiBuffer::build_simple(&input_text, cx);
3677 Editor::new(editor_mode, buffer, None, cx)
3678 });
3679 let editor = window.root(cx).unwrap();
3680 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3681 let mut element = EditorElement::new(&editor, style);
3682 window
3683 .update(cx, |editor, cx| {
3684 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3685 editor.set_wrap_width(Some(editor_width), cx);
3686 })
3687 .unwrap();
3688 let layout_state = cx
3689 .update_window(window.into(), |_, cx| {
3690 element.compute_layout(
3691 Bounds {
3692 origin: point(px(500.), px(500.)),
3693 size: size(px(500.), px(500.)),
3694 },
3695 cx,
3696 )
3697 })
3698 .unwrap();
3699
3700 layout_state
3701 .position_map
3702 .line_layouts
3703 .iter()
3704 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3705 .flatten()
3706 .cloned()
3707 .collect()
3708 }
3709}
3710
3711pub fn register_action<T: Action>(
3712 view: &View<Editor>,
3713 cx: &mut WindowContext,
3714 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3715) {
3716 let view = view.clone();
3717 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3718 let action = action.downcast_ref().unwrap();
3719 if phase == DispatchPhase::Bubble {
3720 view.update(cx, |editor, cx| {
3721 listener(editor, action, cx);
3722 })
3723 }
3724 })
3725}
3726
3727fn compute_auto_height_layout(
3728 editor: &mut Editor,
3729 max_lines: usize,
3730 max_line_number_width: Pixels,
3731 known_dimensions: Size<Option<Pixels>>,
3732 cx: &mut ViewContext<Editor>,
3733) -> Option<Size<Pixels>> {
3734 let mut width = known_dimensions.width?;
3735 if let Some(height) = known_dimensions.height {
3736 return Some(size(width, height));
3737 }
3738
3739 let style = editor.style.as_ref().unwrap();
3740 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3741 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3742 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3743 let em_width = cx
3744 .text_system()
3745 .typographic_bounds(font_id, font_size, 'm')
3746 .unwrap()
3747 .size
3748 .width;
3749
3750 let mut snapshot = editor.snapshot(cx);
3751 let gutter_padding;
3752 let gutter_width;
3753 let gutter_margin;
3754 if snapshot.show_gutter {
3755 let descent = cx.text_system().descent(font_id, font_size);
3756 let gutter_padding_factor = 3.5;
3757 gutter_padding = (em_width * gutter_padding_factor).round();
3758 gutter_width = max_line_number_width + gutter_padding * 2.0;
3759 gutter_margin = -descent;
3760 } else {
3761 gutter_padding = Pixels::ZERO;
3762 gutter_width = Pixels::ZERO;
3763 gutter_margin = Pixels::ZERO;
3764 };
3765
3766 editor.gutter_width = gutter_width;
3767 let text_width = width - gutter_width;
3768 let overscroll = size(em_width, px(0.));
3769
3770 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3771 if editor.set_wrap_width(Some(editor_width), cx) {
3772 snapshot = editor.snapshot(cx);
3773 }
3774
3775 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3776 let height = scroll_height
3777 .max(line_height)
3778 .min(line_height * max_lines as f32);
3779
3780 Some(size(width, height))
3781}