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_and_update_state(
937 fold_bounds.origin,
938 fold_bounds.size,
939 cx,
940 |fold_element_state, cx| {
941 if fold_element_state.is_active() {
942 cx.theme().colors().ghost_element_active
943 } else if fold_bounds.contains(&cx.mouse_position()) {
944 cx.theme().colors().ghost_element_hover
945 } else {
946 cx.theme().colors().ghost_element_background
947 }
948 },
949 )
950 });
951
952 self.paint_highlighted_range(
953 display_range.clone(),
954 fold_background,
955 fold_corner_radius,
956 fold_corner_radius * 2.,
957 layout,
958 content_origin,
959 text_bounds,
960 cx,
961 );
962 }
963 });
964
965 for (range, color) in &layout.highlighted_ranges {
966 self.paint_highlighted_range(
967 range.clone(),
968 *color,
969 Pixels::ZERO,
970 line_end_overshoot,
971 layout,
972 content_origin,
973 text_bounds,
974 cx,
975 );
976 }
977
978 let mut cursors = SmallVec::<[Cursor; 32]>::new();
979 let corner_radius = 0.15 * layout.position_map.line_height;
980 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
981
982 for (selection_style, selections) in &layout.selections {
983 for selection in selections {
984 self.paint_highlighted_range(
985 selection.range.clone(),
986 selection_style.selection,
987 corner_radius,
988 corner_radius * 2.,
989 layout,
990 content_origin,
991 text_bounds,
992 cx,
993 );
994
995 if selection.is_local && !selection.range.is_empty() {
996 invisible_display_ranges.push(selection.range.clone());
997 }
998
999 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1000 let cursor_position = selection.head;
1001 if layout
1002 .visible_display_row_range
1003 .contains(&cursor_position.row())
1004 {
1005 let cursor_row_layout = &layout.position_map.line_layouts
1006 [(cursor_position.row() - start_row) as usize]
1007 .line;
1008 let cursor_column = cursor_position.column() as usize;
1009
1010 let cursor_character_x =
1011 cursor_row_layout.x_for_index(cursor_column);
1012 let mut block_width = cursor_row_layout
1013 .x_for_index(cursor_column + 1)
1014 - cursor_character_x;
1015 if block_width == Pixels::ZERO {
1016 block_width = layout.position_map.em_width;
1017 }
1018 let block_text = if let CursorShape::Block = selection.cursor_shape
1019 {
1020 layout
1021 .position_map
1022 .snapshot
1023 .chars_at(cursor_position)
1024 .next()
1025 .and_then(|(character, _)| {
1026 // todo!() currently shape_line panics if text conatins newlines
1027 let text = if character == '\n' {
1028 SharedString::from(" ")
1029 } else {
1030 SharedString::from(character.to_string())
1031 };
1032 let len = text.len();
1033 cx.text_system()
1034 .shape_line(
1035 text,
1036 cursor_row_layout.font_size,
1037 &[TextRun {
1038 len,
1039 font: self.style.text.font(),
1040 color: self.style.background,
1041 background_color: None,
1042 underline: None,
1043 }],
1044 )
1045 .log_err()
1046 })
1047 } else {
1048 None
1049 };
1050
1051 let x = cursor_character_x - layout.position_map.scroll_position.x;
1052 let y = cursor_position.row() as f32
1053 * layout.position_map.line_height
1054 - layout.position_map.scroll_position.y;
1055 if selection.is_newest {
1056 self.editor.update(cx, |editor, _| {
1057 editor.pixel_position_of_newest_cursor = Some(point(
1058 text_bounds.origin.x + x + block_width / 2.,
1059 text_bounds.origin.y
1060 + y
1061 + layout.position_map.line_height / 2.,
1062 ))
1063 });
1064 }
1065 cursors.push(Cursor {
1066 color: selection_style.cursor,
1067 block_width,
1068 origin: point(x, y),
1069 line_height: layout.position_map.line_height,
1070 shape: selection.cursor_shape,
1071 block_text,
1072 });
1073 }
1074 }
1075 }
1076 }
1077
1078 for (ix, line_with_invisibles) in
1079 layout.position_map.line_layouts.iter().enumerate()
1080 {
1081 let row = start_row + ix as u32;
1082 line_with_invisibles.draw(
1083 layout,
1084 row,
1085 content_origin,
1086 whitespace_setting,
1087 &invisible_display_ranges,
1088 cx,
1089 )
1090 }
1091
1092 cx.with_z_index(0, |cx| {
1093 for cursor in cursors {
1094 cursor.paint(content_origin, cx);
1095 }
1096 });
1097 },
1098 )
1099 }
1100
1101 fn paint_overlays(
1102 &mut self,
1103 text_bounds: Bounds<Pixels>,
1104 layout: &mut LayoutState,
1105 cx: &mut WindowContext,
1106 ) {
1107 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1108 let start_row = layout.visible_display_row_range.start;
1109 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1110 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1111 let context_menu_size = context_menu.measure(available_space, cx);
1112
1113 let cursor_row_layout =
1114 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1115 let x = cursor_row_layout.x_for_index(position.column() as usize)
1116 - layout.position_map.scroll_position.x;
1117 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1118 - layout.position_map.scroll_position.y;
1119 let mut list_origin = content_origin + point(x, y);
1120 let list_width = context_menu_size.width;
1121 let list_height = context_menu_size.height;
1122
1123 // Snap the right edge of the list to the right edge of the window if
1124 // its horizontal bounds overflow.
1125 if list_origin.x + list_width > cx.viewport_size().width {
1126 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1127 }
1128
1129 if list_origin.y + list_height > text_bounds.lower_right().y {
1130 list_origin.y -= layout.position_map.line_height + list_height;
1131 }
1132
1133 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1134 }
1135
1136 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1137 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1138
1139 // This is safe because we check on layout whether the required row is available
1140 let hovered_row_layout =
1141 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1142
1143 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1144 // height. This is the size we will use to decide whether to render popovers above or below
1145 // the hovered line.
1146 let first_size = hover_popovers[0].measure(available_space, cx);
1147 let height_to_reserve =
1148 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1149
1150 // Compute Hovered Point
1151 let x = hovered_row_layout.x_for_index(position.column() as usize)
1152 - layout.position_map.scroll_position.x;
1153 let y = position.row() as f32 * layout.position_map.line_height
1154 - layout.position_map.scroll_position.y;
1155 let hovered_point = content_origin + point(x, y);
1156
1157 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1158 // There is enough space above. Render popovers above the hovered point
1159 let mut current_y = hovered_point.y;
1160 for mut hover_popover in hover_popovers {
1161 let size = hover_popover.measure(available_space, cx);
1162 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1163
1164 let x_out_of_bounds =
1165 text_bounds.upper_right().x - (popover_origin.x + size.width);
1166 if x_out_of_bounds < Pixels::ZERO {
1167 popover_origin.x = popover_origin.x + x_out_of_bounds;
1168 }
1169
1170 cx.break_content_mask(|cx| {
1171 hover_popover.draw(popover_origin, available_space, cx)
1172 });
1173
1174 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1175 }
1176 } else {
1177 // There is not enough space above. Render popovers below the hovered point
1178 let mut current_y = hovered_point.y + layout.position_map.line_height;
1179 for mut hover_popover in hover_popovers {
1180 let size = hover_popover.measure(available_space, cx);
1181 let mut popover_origin = point(hovered_point.x, current_y);
1182
1183 let x_out_of_bounds =
1184 text_bounds.upper_right().x - (popover_origin.x + size.width);
1185 if x_out_of_bounds < Pixels::ZERO {
1186 popover_origin.x = popover_origin.x + x_out_of_bounds;
1187 }
1188
1189 hover_popover.draw(popover_origin, available_space, cx);
1190
1191 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1192 }
1193 }
1194 }
1195
1196 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1197 let element = overlay()
1198 .position(mouse_context_menu.position)
1199 .child(mouse_context_menu.context_menu.clone())
1200 .anchor(AnchorCorner::TopLeft)
1201 .snap_to_window();
1202 element.into_any().draw(
1203 gpui::Point::default(),
1204 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1205 cx,
1206 );
1207 }
1208 }
1209
1210 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1211 bounds.upper_right().x - self.style.scrollbar_width
1212 }
1213
1214 fn paint_scrollbar(
1215 &mut self,
1216 bounds: Bounds<Pixels>,
1217 layout: &mut LayoutState,
1218 cx: &mut WindowContext,
1219 ) {
1220 if layout.mode != EditorMode::Full {
1221 return;
1222 }
1223
1224 let top = bounds.origin.y;
1225 let bottom = bounds.lower_left().y;
1226 let right = bounds.lower_right().x;
1227 let left = self.scrollbar_left(&bounds);
1228 let row_range = layout.scrollbar_row_range.clone();
1229 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1230
1231 let mut height = bounds.size.height;
1232 let mut first_row_y_offset = px(0.0);
1233
1234 // Impose a minimum height on the scrollbar thumb
1235 let row_height = height / max_row;
1236 let min_thumb_height = layout.position_map.line_height;
1237 let thumb_height = (row_range.end - row_range.start) * row_height;
1238 if thumb_height < min_thumb_height {
1239 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1240 height -= min_thumb_height - thumb_height;
1241 }
1242
1243 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1244
1245 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1246 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1247 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1248 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1249
1250 if layout.show_scrollbars {
1251 cx.paint_quad(quad(
1252 track_bounds,
1253 Corners::default(),
1254 cx.theme().colors().scrollbar_track_background,
1255 Edges {
1256 top: Pixels::ZERO,
1257 right: Pixels::ZERO,
1258 bottom: Pixels::ZERO,
1259 left: px(1.),
1260 },
1261 cx.theme().colors().scrollbar_track_border,
1262 ));
1263 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1264 if layout.is_singleton && scrollbar_settings.selections {
1265 let start_anchor = Anchor::min();
1266 let end_anchor = Anchor::max();
1267 let background_ranges = self
1268 .editor
1269 .read(cx)
1270 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1271 start_anchor..end_anchor,
1272 &layout.position_map.snapshot,
1273 50000,
1274 );
1275 for range in background_ranges {
1276 let start_y = y_for_row(range.start().row() as f32);
1277 let mut end_y = y_for_row(range.end().row() as f32);
1278 if end_y - start_y < px(1.) {
1279 end_y = start_y + px(1.);
1280 }
1281 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1282 cx.paint_quad(quad(
1283 bounds,
1284 Corners::default(),
1285 cx.theme().status().info,
1286 Edges {
1287 top: Pixels::ZERO,
1288 right: px(1.),
1289 bottom: Pixels::ZERO,
1290 left: px(1.),
1291 },
1292 cx.theme().colors().scrollbar_thumb_border,
1293 ));
1294 }
1295 }
1296
1297 if layout.is_singleton && scrollbar_settings.git_diff {
1298 for hunk in layout
1299 .position_map
1300 .snapshot
1301 .buffer_snapshot
1302 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1303 {
1304 let start_display = Point::new(hunk.buffer_range.start, 0)
1305 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1306 let end_display = Point::new(hunk.buffer_range.end, 0)
1307 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1308 let start_y = y_for_row(start_display.row() as f32);
1309 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1310 y_for_row((end_display.row() + 1) as f32)
1311 } else {
1312 y_for_row((end_display.row()) as f32)
1313 };
1314
1315 if end_y - start_y < px(1.) {
1316 end_y = start_y + px(1.);
1317 }
1318 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1319
1320 let color = match hunk.status() {
1321 DiffHunkStatus::Added => cx.theme().status().created,
1322 DiffHunkStatus::Modified => cx.theme().status().modified,
1323 DiffHunkStatus::Removed => cx.theme().status().deleted,
1324 };
1325 cx.paint_quad(quad(
1326 bounds,
1327 Corners::default(),
1328 color,
1329 Edges {
1330 top: Pixels::ZERO,
1331 right: px(1.),
1332 bottom: Pixels::ZERO,
1333 left: px(1.),
1334 },
1335 cx.theme().colors().scrollbar_thumb_border,
1336 ));
1337 }
1338 }
1339
1340 cx.paint_quad(quad(
1341 thumb_bounds,
1342 Corners::default(),
1343 cx.theme().colors().scrollbar_thumb_background,
1344 Edges {
1345 top: Pixels::ZERO,
1346 right: px(1.),
1347 bottom: Pixels::ZERO,
1348 left: px(1.),
1349 },
1350 cx.theme().colors().scrollbar_thumb_border,
1351 ));
1352 }
1353
1354 let mouse_position = cx.mouse_position();
1355 if track_bounds.contains(&mouse_position) {
1356 cx.set_cursor_style(CursorStyle::Arrow);
1357 }
1358
1359 cx.on_mouse_event({
1360 let editor = self.editor.clone();
1361 move |event: &MouseMoveEvent, phase, cx| {
1362 if phase == DispatchPhase::Capture {
1363 return;
1364 }
1365
1366 editor.update(cx, |editor, cx| {
1367 if event.pressed_button == Some(MouseButton::Left)
1368 && editor.scroll_manager.is_dragging_scrollbar()
1369 {
1370 let y = mouse_position.y;
1371 let new_y = event.position.y;
1372 if thumb_top < y && y < thumb_bottom {
1373 let mut position = editor.scroll_position(cx);
1374 position.y += (new_y - y) * (max_row as f32) / height;
1375 if position.y < 0.0 {
1376 position.y = 0.0;
1377 }
1378 editor.set_scroll_position(position, cx);
1379 }
1380 cx.stop_propagation();
1381 } else {
1382 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1383 if track_bounds.contains(&event.position) {
1384 editor.scroll_manager.show_scrollbar(cx);
1385 }
1386 }
1387 })
1388 }
1389 });
1390
1391 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1392 cx.on_mouse_event({
1393 let editor = self.editor.clone();
1394 move |event: &MouseUpEvent, phase, cx| {
1395 editor.update(cx, |editor, cx| {
1396 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1397 cx.stop_propagation();
1398 });
1399 }
1400 });
1401 } else {
1402 cx.on_mouse_event({
1403 let editor = self.editor.clone();
1404 move |event: &MouseDownEvent, phase, cx| {
1405 editor.update(cx, |editor, cx| {
1406 if track_bounds.contains(&event.position) {
1407 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1408
1409 let y = event.position.y;
1410 if y < thumb_top || thumb_bottom < y {
1411 let center_row =
1412 ((y - top) * max_row as f32 / height).round() as u32;
1413 let top_row = center_row
1414 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1415 let mut position = editor.scroll_position(cx);
1416 position.y = top_row as f32;
1417 editor.set_scroll_position(position, cx);
1418 } else {
1419 editor.scroll_manager.show_scrollbar(cx);
1420 }
1421
1422 cx.stop_propagation();
1423 }
1424 });
1425 }
1426 });
1427 }
1428 }
1429
1430 #[allow(clippy::too_many_arguments)]
1431 fn paint_highlighted_range(
1432 &self,
1433 range: Range<DisplayPoint>,
1434 color: Hsla,
1435 corner_radius: Pixels,
1436 line_end_overshoot: Pixels,
1437 layout: &LayoutState,
1438 content_origin: gpui::Point<Pixels>,
1439 bounds: Bounds<Pixels>,
1440 cx: &mut WindowContext,
1441 ) {
1442 let start_row = layout.visible_display_row_range.start;
1443 let end_row = layout.visible_display_row_range.end;
1444 if range.start != range.end {
1445 let row_range = if range.end.column() == 0 {
1446 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1447 } else {
1448 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1449 };
1450
1451 let highlighted_range = HighlightedRange {
1452 color,
1453 line_height: layout.position_map.line_height,
1454 corner_radius,
1455 start_y: content_origin.y
1456 + row_range.start as f32 * layout.position_map.line_height
1457 - layout.position_map.scroll_position.y,
1458 lines: row_range
1459 .into_iter()
1460 .map(|row| {
1461 let line_layout =
1462 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1463 HighlightedRangeLine {
1464 start_x: if row == range.start.row() {
1465 content_origin.x
1466 + line_layout.x_for_index(range.start.column() as usize)
1467 - layout.position_map.scroll_position.x
1468 } else {
1469 content_origin.x - layout.position_map.scroll_position.x
1470 },
1471 end_x: if row == range.end.row() {
1472 content_origin.x
1473 + line_layout.x_for_index(range.end.column() as usize)
1474 - layout.position_map.scroll_position.x
1475 } else {
1476 content_origin.x + line_layout.width + line_end_overshoot
1477 - layout.position_map.scroll_position.x
1478 },
1479 }
1480 })
1481 .collect(),
1482 };
1483
1484 highlighted_range.paint(bounds, cx);
1485 }
1486 }
1487
1488 fn paint_blocks(
1489 &mut self,
1490 bounds: Bounds<Pixels>,
1491 layout: &mut LayoutState,
1492 cx: &mut WindowContext,
1493 ) {
1494 let scroll_position = layout.position_map.snapshot.scroll_position();
1495 let scroll_left = scroll_position.x * layout.position_map.em_width;
1496 let scroll_top = scroll_position.y * layout.position_map.line_height;
1497
1498 for mut block in layout.blocks.drain(..) {
1499 let mut origin = bounds.origin
1500 + point(
1501 Pixels::ZERO,
1502 block.row as f32 * layout.position_map.line_height - scroll_top,
1503 );
1504 if !matches!(block.style, BlockStyle::Sticky) {
1505 origin += point(-scroll_left, Pixels::ZERO);
1506 }
1507 block.element.draw(origin, block.available_space, cx);
1508 }
1509 }
1510
1511 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1512 let style = &self.style;
1513 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1514 let layout = cx
1515 .text_system()
1516 .shape_line(
1517 SharedString::from(" ".repeat(column)),
1518 font_size,
1519 &[TextRun {
1520 len: column,
1521 font: style.text.font(),
1522 color: Hsla::default(),
1523 background_color: None,
1524 underline: None,
1525 }],
1526 )
1527 .unwrap();
1528
1529 layout.width
1530 }
1531
1532 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1533 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1534 self.column_pixels(digit_count, cx)
1535 }
1536
1537 //Folds contained in a hunk are ignored apart from shrinking visual size
1538 //If a fold contains any hunks then that fold line is marked as modified
1539 fn layout_git_gutters(
1540 &self,
1541 display_rows: Range<u32>,
1542 snapshot: &EditorSnapshot,
1543 ) -> Vec<DisplayDiffHunk> {
1544 let buffer_snapshot = &snapshot.buffer_snapshot;
1545
1546 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1547 .to_point(snapshot)
1548 .row;
1549 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1550 .to_point(snapshot)
1551 .row;
1552
1553 buffer_snapshot
1554 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1555 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1556 .dedup()
1557 .collect()
1558 }
1559
1560 fn calculate_relative_line_numbers(
1561 &self,
1562 snapshot: &EditorSnapshot,
1563 rows: &Range<u32>,
1564 relative_to: Option<u32>,
1565 ) -> HashMap<u32, u32> {
1566 let mut relative_rows: HashMap<u32, u32> = Default::default();
1567 let Some(relative_to) = relative_to else {
1568 return relative_rows;
1569 };
1570
1571 let start = rows.start.min(relative_to);
1572 let end = rows.end.max(relative_to);
1573
1574 let buffer_rows = snapshot
1575 .buffer_rows(start)
1576 .take(1 + (end - start) as usize)
1577 .collect::<Vec<_>>();
1578
1579 let head_idx = relative_to - start;
1580 let mut delta = 1;
1581 let mut i = head_idx + 1;
1582 while i < buffer_rows.len() as u32 {
1583 if buffer_rows[i as usize].is_some() {
1584 if rows.contains(&(i + start)) {
1585 relative_rows.insert(i + start, delta);
1586 }
1587 delta += 1;
1588 }
1589 i += 1;
1590 }
1591 delta = 1;
1592 i = head_idx.min(buffer_rows.len() as u32 - 1);
1593 while i > 0 && buffer_rows[i as usize].is_none() {
1594 i -= 1;
1595 }
1596
1597 while i > 0 {
1598 i -= 1;
1599 if buffer_rows[i as usize].is_some() {
1600 if rows.contains(&(i + start)) {
1601 relative_rows.insert(i + start, delta);
1602 }
1603 delta += 1;
1604 }
1605 }
1606
1607 relative_rows
1608 }
1609
1610 fn shape_line_numbers(
1611 &self,
1612 rows: Range<u32>,
1613 active_rows: &BTreeMap<u32, bool>,
1614 newest_selection_head: DisplayPoint,
1615 is_singleton: bool,
1616 snapshot: &EditorSnapshot,
1617 cx: &ViewContext<Editor>,
1618 ) -> (
1619 Vec<Option<ShapedLine>>,
1620 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1621 ) {
1622 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1623 let include_line_numbers = snapshot.mode == EditorMode::Full;
1624 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1625 let mut fold_statuses = Vec::with_capacity(rows.len());
1626 let mut line_number = String::new();
1627 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1628 let relative_to = if is_relative {
1629 Some(newest_selection_head.row())
1630 } else {
1631 None
1632 };
1633
1634 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1635
1636 for (ix, row) in snapshot
1637 .buffer_rows(rows.start)
1638 .take((rows.end - rows.start) as usize)
1639 .enumerate()
1640 {
1641 let display_row = rows.start + ix as u32;
1642 let (active, color) = if active_rows.contains_key(&display_row) {
1643 (true, cx.theme().colors().editor_active_line_number)
1644 } else {
1645 (false, cx.theme().colors().editor_line_number)
1646 };
1647 if let Some(buffer_row) = row {
1648 if include_line_numbers {
1649 line_number.clear();
1650 let default_number = buffer_row + 1;
1651 let number = relative_rows
1652 .get(&(ix as u32 + rows.start))
1653 .unwrap_or(&default_number);
1654 write!(&mut line_number, "{}", number).unwrap();
1655 let run = TextRun {
1656 len: line_number.len(),
1657 font: self.style.text.font(),
1658 color,
1659 background_color: None,
1660 underline: None,
1661 };
1662 let shaped_line = cx
1663 .text_system()
1664 .shape_line(line_number.clone().into(), font_size, &[run])
1665 .unwrap();
1666 shaped_line_numbers.push(Some(shaped_line));
1667 fold_statuses.push(
1668 is_singleton
1669 .then(|| {
1670 snapshot
1671 .fold_for_line(buffer_row)
1672 .map(|fold_status| (fold_status, buffer_row, active))
1673 })
1674 .flatten(),
1675 )
1676 }
1677 } else {
1678 fold_statuses.push(None);
1679 shaped_line_numbers.push(None);
1680 }
1681 }
1682
1683 (shaped_line_numbers, fold_statuses)
1684 }
1685
1686 fn layout_lines(
1687 &self,
1688 rows: Range<u32>,
1689 line_number_layouts: &[Option<ShapedLine>],
1690 snapshot: &EditorSnapshot,
1691 cx: &ViewContext<Editor>,
1692 ) -> Vec<LineWithInvisibles> {
1693 if rows.start >= rows.end {
1694 return Vec::new();
1695 }
1696
1697 // When the editor is empty and unfocused, then show the placeholder.
1698 if snapshot.is_empty() {
1699 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1700 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1701 let placeholder_text = snapshot.placeholder_text();
1702 let placeholder_lines = placeholder_text
1703 .as_ref()
1704 .map_or("", AsRef::as_ref)
1705 .split('\n')
1706 .skip(rows.start as usize)
1707 .chain(iter::repeat(""))
1708 .take(rows.len());
1709 placeholder_lines
1710 .filter_map(move |line| {
1711 let run = TextRun {
1712 len: line.len(),
1713 font: self.style.text.font(),
1714 color: placeholder_color,
1715 background_color: None,
1716 underline: Default::default(),
1717 };
1718 cx.text_system()
1719 .shape_line(line.to_string().into(), font_size, &[run])
1720 .log_err()
1721 })
1722 .map(|line| LineWithInvisibles {
1723 line,
1724 invisibles: Vec::new(),
1725 })
1726 .collect()
1727 } else {
1728 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1729 LineWithInvisibles::from_chunks(
1730 chunks,
1731 &self.style.text,
1732 MAX_LINE_LEN,
1733 rows.len() as usize,
1734 line_number_layouts,
1735 snapshot.mode,
1736 cx,
1737 )
1738 }
1739 }
1740
1741 fn compute_layout(
1742 &mut self,
1743 mut bounds: Bounds<Pixels>,
1744 cx: &mut WindowContext,
1745 ) -> LayoutState {
1746 self.editor.update(cx, |editor, cx| {
1747 let snapshot = editor.snapshot(cx);
1748 let style = self.style.clone();
1749
1750 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1751 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1752 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1753 let em_width = cx
1754 .text_system()
1755 .typographic_bounds(font_id, font_size, 'm')
1756 .unwrap()
1757 .size
1758 .width;
1759 let em_advance = cx
1760 .text_system()
1761 .advance(font_id, font_size, 'm')
1762 .unwrap()
1763 .width;
1764
1765 let gutter_padding;
1766 let gutter_width;
1767 let gutter_margin;
1768 if snapshot.show_gutter {
1769 let descent = cx.text_system().descent(font_id, font_size);
1770
1771 let gutter_padding_factor = 3.5;
1772 gutter_padding = (em_width * gutter_padding_factor).round();
1773 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1774 gutter_margin = -descent;
1775 } else {
1776 gutter_padding = Pixels::ZERO;
1777 gutter_width = Pixels::ZERO;
1778 gutter_margin = Pixels::ZERO;
1779 };
1780
1781 editor.gutter_width = gutter_width;
1782
1783 let text_width = bounds.size.width - gutter_width;
1784 let overscroll = size(em_width, px(0.));
1785 let snapshot = {
1786 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1787
1788 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1789 let wrap_width = match editor.soft_wrap_mode(cx) {
1790 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1791 SoftWrap::EditorWidth => editor_width,
1792 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1793 };
1794
1795 if editor.set_wrap_width(Some(wrap_width), cx) {
1796 editor.snapshot(cx)
1797 } else {
1798 snapshot
1799 }
1800 };
1801
1802 let wrap_guides = editor
1803 .wrap_guides(cx)
1804 .iter()
1805 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1806 .collect::<SmallVec<[_; 2]>>();
1807
1808 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1809 let gutter_size = size(gutter_width, bounds.size.height);
1810 let text_size = size(text_width, bounds.size.height);
1811
1812 let autoscroll_horizontally =
1813 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1814 let mut snapshot = editor.snapshot(cx);
1815
1816 let scroll_position = snapshot.scroll_position();
1817 // The scroll position is a fractional point, the whole number of which represents
1818 // the top of the window in terms of display rows.
1819 let start_row = scroll_position.y as u32;
1820 let height_in_lines = f32::from(bounds.size.height / line_height);
1821 let max_row = snapshot.max_point().row();
1822
1823 // Add 1 to ensure selections bleed off screen
1824 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1825
1826 let start_anchor = if start_row == 0 {
1827 Anchor::min()
1828 } else {
1829 snapshot
1830 .buffer_snapshot
1831 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1832 };
1833 let end_anchor = if end_row > max_row {
1834 Anchor::max()
1835 } else {
1836 snapshot
1837 .buffer_snapshot
1838 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1839 };
1840
1841 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1842 let mut active_rows = BTreeMap::new();
1843 let is_singleton = editor.is_singleton(cx);
1844
1845 let highlighted_rows = editor.highlighted_rows();
1846 let highlighted_ranges = editor.background_highlights_in_range(
1847 start_anchor..end_anchor,
1848 &snapshot.display_snapshot,
1849 cx.theme().colors(),
1850 );
1851
1852 let mut newest_selection_head = None;
1853
1854 if editor.show_local_selections {
1855 let mut local_selections: Vec<Selection<Point>> = editor
1856 .selections
1857 .disjoint_in_range(start_anchor..end_anchor, cx);
1858 local_selections.extend(editor.selections.pending(cx));
1859 let mut layouts = Vec::new();
1860 let newest = editor.selections.newest(cx);
1861 for selection in local_selections.drain(..) {
1862 let is_empty = selection.start == selection.end;
1863 let is_newest = selection == newest;
1864
1865 let layout = SelectionLayout::new(
1866 selection,
1867 editor.selections.line_mode,
1868 editor.cursor_shape,
1869 &snapshot.display_snapshot,
1870 is_newest,
1871 true,
1872 );
1873 if is_newest {
1874 newest_selection_head = Some(layout.head);
1875 }
1876
1877 for row in cmp::max(layout.active_rows.start, start_row)
1878 ..=cmp::min(layout.active_rows.end, end_row)
1879 {
1880 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1881 *contains_non_empty_selection |= !is_empty;
1882 }
1883 layouts.push(layout);
1884 }
1885
1886 selections.push((style.local_player, layouts));
1887 }
1888
1889 if let Some(collaboration_hub) = &editor.collaboration_hub {
1890 // When following someone, render the local selections in their color.
1891 if let Some(leader_id) = editor.leader_peer_id {
1892 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1893 if let Some(participant_index) = collaboration_hub
1894 .user_participant_indices(cx)
1895 .get(&collaborator.user_id)
1896 {
1897 if let Some((local_selection_style, _)) = selections.first_mut() {
1898 *local_selection_style = cx
1899 .theme()
1900 .players()
1901 .color_for_participant(participant_index.0);
1902 }
1903 }
1904 }
1905 }
1906
1907 let mut remote_selections = HashMap::default();
1908 for selection in snapshot.remote_selections_in_range(
1909 &(start_anchor..end_anchor),
1910 collaboration_hub.as_ref(),
1911 cx,
1912 ) {
1913 let selection_style = if let Some(participant_index) = selection.participant_index {
1914 cx.theme()
1915 .players()
1916 .color_for_participant(participant_index.0)
1917 } else {
1918 cx.theme().players().absent()
1919 };
1920
1921 // Don't re-render the leader's selections, since the local selections
1922 // match theirs.
1923 if Some(selection.peer_id) == editor.leader_peer_id {
1924 continue;
1925 }
1926
1927 remote_selections
1928 .entry(selection.replica_id)
1929 .or_insert((selection_style, Vec::new()))
1930 .1
1931 .push(SelectionLayout::new(
1932 selection.selection,
1933 selection.line_mode,
1934 selection.cursor_shape,
1935 &snapshot.display_snapshot,
1936 false,
1937 false,
1938 ));
1939 }
1940
1941 selections.extend(remote_selections.into_values());
1942 }
1943
1944 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1945 let show_scrollbars = match scrollbar_settings.show {
1946 ShowScrollbar::Auto => {
1947 // Git
1948 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1949 ||
1950 // Selections
1951 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1952 // Scrollmanager
1953 || editor.scroll_manager.scrollbars_visible()
1954 }
1955 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1956 ShowScrollbar::Always => true,
1957 ShowScrollbar::Never => false,
1958 };
1959
1960 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1961 let newest = editor.selections.newest::<Point>(cx);
1962 SelectionLayout::new(
1963 newest,
1964 editor.selections.line_mode,
1965 editor.cursor_shape,
1966 &snapshot.display_snapshot,
1967 true,
1968 true,
1969 )
1970 .head
1971 });
1972
1973 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1974 start_row..end_row,
1975 &active_rows,
1976 head_for_relative,
1977 is_singleton,
1978 &snapshot,
1979 cx,
1980 );
1981
1982 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1983
1984 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1985
1986 let mut max_visible_line_width = Pixels::ZERO;
1987 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1988 for line_with_invisibles in &line_layouts {
1989 if line_with_invisibles.line.width > max_visible_line_width {
1990 max_visible_line_width = line_with_invisibles.line.width;
1991 }
1992 }
1993
1994 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
1995 .unwrap()
1996 .width;
1997 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
1998
1999 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2000 self.layout_blocks(
2001 start_row..end_row,
2002 &snapshot,
2003 bounds.size.width,
2004 scroll_width,
2005 gutter_padding,
2006 gutter_width,
2007 em_width,
2008 gutter_width + gutter_margin,
2009 line_height,
2010 &style,
2011 &line_layouts,
2012 editor,
2013 cx,
2014 )
2015 });
2016
2017 let scroll_max = point(
2018 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2019 max_row as f32,
2020 );
2021
2022 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2023
2024 let autoscrolled = if autoscroll_horizontally {
2025 editor.autoscroll_horizontally(
2026 start_row,
2027 text_size.width,
2028 scroll_width,
2029 em_width,
2030 &line_layouts,
2031 cx,
2032 )
2033 } else {
2034 false
2035 };
2036
2037 if clamped || autoscrolled {
2038 snapshot = editor.snapshot(cx);
2039 }
2040
2041 let mut context_menu = None;
2042 let mut code_actions_indicator = None;
2043 if let Some(newest_selection_head) = newest_selection_head {
2044 if (start_row..end_row).contains(&newest_selection_head.row()) {
2045 if editor.context_menu_visible() {
2046 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2047 context_menu =
2048 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2049 }
2050
2051 let active = matches!(
2052 editor.context_menu.read().as_ref(),
2053 Some(crate::ContextMenu::CodeActions(_))
2054 );
2055
2056 code_actions_indicator = editor
2057 .render_code_actions_indicator(&style, active, cx)
2058 .map(|element| CodeActionsIndicator {
2059 row: newest_selection_head.row(),
2060 button: element,
2061 });
2062 }
2063 }
2064
2065 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2066 let max_size = size(
2067 (120. * em_width) // Default size
2068 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2069 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2070 (16. * line_height) // Default size
2071 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2072 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2073 );
2074
2075 let mut hover = editor.hover_state.render(
2076 &snapshot,
2077 &style,
2078 visible_rows,
2079 max_size,
2080 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2081 cx,
2082 );
2083
2084 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2085 editor.render_fold_indicators(
2086 fold_statuses,
2087 &style,
2088 editor.gutter_hovered,
2089 line_height,
2090 gutter_margin,
2091 cx,
2092 )
2093 });
2094
2095 let invisible_symbol_font_size = font_size / 2.;
2096 let tab_invisible = cx
2097 .text_system()
2098 .shape_line(
2099 "→".into(),
2100 invisible_symbol_font_size,
2101 &[TextRun {
2102 len: "→".len(),
2103 font: self.style.text.font(),
2104 color: cx.theme().colors().editor_invisible,
2105 background_color: None,
2106 underline: None,
2107 }],
2108 )
2109 .unwrap();
2110 let space_invisible = cx
2111 .text_system()
2112 .shape_line(
2113 "•".into(),
2114 invisible_symbol_font_size,
2115 &[TextRun {
2116 len: "•".len(),
2117 font: self.style.text.font(),
2118 color: cx.theme().colors().editor_invisible,
2119 background_color: None,
2120 underline: None,
2121 }],
2122 )
2123 .unwrap();
2124
2125 LayoutState {
2126 mode: snapshot.mode,
2127 position_map: Arc::new(PositionMap {
2128 size: bounds.size,
2129 scroll_position: point(
2130 scroll_position.x * em_width,
2131 scroll_position.y * line_height,
2132 ),
2133 scroll_max,
2134 line_layouts,
2135 line_height,
2136 em_width,
2137 em_advance,
2138 snapshot,
2139 }),
2140 visible_anchor_range: start_anchor..end_anchor,
2141 visible_display_row_range: start_row..end_row,
2142 wrap_guides,
2143 gutter_size,
2144 gutter_padding,
2145 text_size,
2146 scrollbar_row_range,
2147 show_scrollbars,
2148 is_singleton,
2149 max_row,
2150 gutter_margin,
2151 active_rows,
2152 highlighted_rows,
2153 highlighted_ranges,
2154 line_numbers,
2155 display_hunks,
2156 blocks,
2157 selections,
2158 context_menu,
2159 code_actions_indicator,
2160 fold_indicators,
2161 tab_invisible,
2162 space_invisible,
2163 hover_popovers: hover,
2164 }
2165 })
2166 }
2167
2168 #[allow(clippy::too_many_arguments)]
2169 fn layout_blocks(
2170 &self,
2171 rows: Range<u32>,
2172 snapshot: &EditorSnapshot,
2173 editor_width: Pixels,
2174 scroll_width: Pixels,
2175 gutter_padding: Pixels,
2176 gutter_width: Pixels,
2177 em_width: Pixels,
2178 text_x: Pixels,
2179 line_height: Pixels,
2180 style: &EditorStyle,
2181 line_layouts: &[LineWithInvisibles],
2182 editor: &mut Editor,
2183 cx: &mut ViewContext<Editor>,
2184 ) -> (Pixels, Vec<BlockLayout>) {
2185 let mut block_id = 0;
2186 let scroll_x = snapshot.scroll_anchor.offset.x;
2187 let (fixed_blocks, non_fixed_blocks) = snapshot
2188 .blocks_in_range(rows.clone())
2189 .partition::<Vec<_>, _>(|(_, block)| match block {
2190 TransformBlock::ExcerptHeader { .. } => false,
2191 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2192 });
2193
2194 let mut render_block = |block: &TransformBlock,
2195 available_space: Size<AvailableSpace>,
2196 block_id: usize,
2197 editor: &mut Editor,
2198 cx: &mut ViewContext<Editor>| {
2199 let mut element = match block {
2200 TransformBlock::Custom(block) => {
2201 let align_to = block
2202 .position()
2203 .to_point(&snapshot.buffer_snapshot)
2204 .to_display_point(snapshot);
2205 let anchor_x = text_x
2206 + if rows.contains(&align_to.row()) {
2207 line_layouts[(align_to.row() - rows.start) as usize]
2208 .line
2209 .x_for_index(align_to.column() as usize)
2210 } else {
2211 layout_line(align_to.row(), snapshot, style, cx)
2212 .unwrap()
2213 .x_for_index(align_to.column() as usize)
2214 };
2215
2216 block.render(&mut BlockContext {
2217 view_context: cx,
2218 anchor_x,
2219 gutter_padding,
2220 line_height,
2221 gutter_width,
2222 em_width,
2223 block_id,
2224 editor_style: &self.style,
2225 })
2226 }
2227
2228 TransformBlock::ExcerptHeader {
2229 buffer,
2230 range,
2231 starts_new_buffer,
2232 ..
2233 } => {
2234 let include_root = editor
2235 .project
2236 .as_ref()
2237 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2238 .unwrap_or_default();
2239
2240 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2241 let jump_path = ProjectPath {
2242 worktree_id: file.worktree_id(cx),
2243 path: file.path.clone(),
2244 };
2245 let jump_anchor = range
2246 .primary
2247 .as_ref()
2248 .map_or(range.context.start, |primary| primary.start);
2249 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2250
2251 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2252 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2253 });
2254
2255 jump_handler
2256 });
2257
2258 let element = if *starts_new_buffer {
2259 let path = buffer.resolve_file_path(cx, include_root);
2260 let mut filename = None;
2261 let mut parent_path = None;
2262 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2263 if let Some(path) = path {
2264 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2265 parent_path = path
2266 .parent()
2267 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2268 }
2269
2270 let is_open = true;
2271
2272 div().id("path header container").size_full().p_1p5().child(
2273 h_stack()
2274 .id("path header block")
2275 .py_1p5()
2276 .pl_3()
2277 .pr_2()
2278 .rounded_lg()
2279 .shadow_md()
2280 .border()
2281 .border_color(cx.theme().colors().border)
2282 .bg(cx.theme().colors().editor_subheader_background)
2283 .justify_between()
2284 .cursor_pointer()
2285 .hover(|style| style.bg(cx.theme().colors().element_hover))
2286 .on_click(cx.listener(|_editor, _event, _cx| {
2287 // todo!() Implement collapsing path headers
2288 // todo!("Clicking path header")
2289 }))
2290 .child(
2291 h_stack()
2292 .gap_3()
2293 // TODO: Add open/close state and toggle action
2294 .child(
2295 div().border().border_color(gpui::red()).child(
2296 ButtonLike::new("path-header-disclosure-control")
2297 .style(ButtonStyle::Subtle)
2298 .child(IconElement::new(match is_open {
2299 true => Icon::ChevronDown,
2300 false => Icon::ChevronRight,
2301 })),
2302 ),
2303 )
2304 .child(
2305 h_stack()
2306 .gap_2()
2307 .child(Label::new(
2308 filename
2309 .map(SharedString::from)
2310 .unwrap_or_else(|| "untitled".into()),
2311 ))
2312 .when_some(parent_path, |then, path| {
2313 then.child(Label::new(path).color(Color::Muted))
2314 }),
2315 ),
2316 )
2317 .children(jump_handler.map(|jump_handler| {
2318 IconButton::new(block_id, Icon::ArrowUpRight)
2319 .style(ButtonStyle::Subtle)
2320 .on_click(jump_handler)
2321 .tooltip(|cx| {
2322 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2323 })
2324 })), // .p_x(gutter_padding)
2325 )
2326 } else {
2327 let text_style = style.text.clone();
2328 h_stack()
2329 .id("collapsed context")
2330 .size_full()
2331 .gap(gutter_padding)
2332 .child(
2333 h_stack()
2334 .justify_end()
2335 .flex_none()
2336 .w(gutter_width - gutter_padding)
2337 .h_full()
2338 .text_buffer(cx)
2339 .text_color(cx.theme().colors().editor_line_number)
2340 .child("..."),
2341 )
2342 .map(|this| {
2343 if let Some(jump_handler) = jump_handler {
2344 this.child(
2345 ButtonLike::new("jump to collapsed context")
2346 .style(ButtonStyle::Transparent)
2347 .full_width()
2348 .on_click(jump_handler)
2349 .tooltip(|cx| {
2350 Tooltip::for_action(
2351 "Jump to Buffer",
2352 &OpenExcerpts,
2353 cx,
2354 )
2355 })
2356 .child(
2357 div()
2358 .h_px()
2359 .w_full()
2360 .bg(cx.theme().colors().border_variant)
2361 .group_hover("", |style| {
2362 style.bg(cx.theme().colors().border)
2363 }),
2364 ),
2365 )
2366 } else {
2367 this.child(div().size_full().bg(gpui::green()))
2368 }
2369 })
2370 // .child("⋯")
2371 // .children(jump_icon) // .p_x(gutter_padding)
2372 };
2373 element.into_any()
2374 }
2375 };
2376
2377 let size = element.measure(available_space, cx);
2378 (element, size)
2379 };
2380
2381 let mut fixed_block_max_width = Pixels::ZERO;
2382 let mut blocks = Vec::new();
2383 for (row, block) in fixed_blocks {
2384 let available_space = size(
2385 AvailableSpace::MinContent,
2386 AvailableSpace::Definite(block.height() as f32 * line_height),
2387 );
2388 let (element, element_size) =
2389 render_block(block, available_space, block_id, editor, cx);
2390 block_id += 1;
2391 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2392 blocks.push(BlockLayout {
2393 row,
2394 element,
2395 available_space,
2396 style: BlockStyle::Fixed,
2397 });
2398 }
2399 for (row, block) in non_fixed_blocks {
2400 let style = match block {
2401 TransformBlock::Custom(block) => block.style(),
2402 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2403 };
2404 let width = match style {
2405 BlockStyle::Sticky => editor_width,
2406 BlockStyle::Flex => editor_width
2407 .max(fixed_block_max_width)
2408 .max(gutter_width + scroll_width),
2409 BlockStyle::Fixed => unreachable!(),
2410 };
2411 let available_space = size(
2412 AvailableSpace::Definite(width),
2413 AvailableSpace::Definite(block.height() as f32 * line_height),
2414 );
2415 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2416 block_id += 1;
2417 blocks.push(BlockLayout {
2418 row,
2419 element,
2420 available_space,
2421 style,
2422 });
2423 }
2424 (
2425 scroll_width.max(fixed_block_max_width - gutter_width),
2426 blocks,
2427 )
2428 }
2429
2430 fn paint_mouse_listeners(
2431 &mut self,
2432 bounds: Bounds<Pixels>,
2433 gutter_bounds: Bounds<Pixels>,
2434 text_bounds: Bounds<Pixels>,
2435 layout: &LayoutState,
2436 cx: &mut WindowContext,
2437 ) {
2438 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2439 let interactive_bounds = InteractiveBounds {
2440 bounds: bounds.intersect(&cx.content_mask().bounds),
2441 stacking_order: cx.stacking_order().clone(),
2442 };
2443
2444 cx.on_mouse_event({
2445 let position_map = layout.position_map.clone();
2446 let editor = self.editor.clone();
2447 let interactive_bounds = interactive_bounds.clone();
2448
2449 move |event: &ScrollWheelEvent, phase, cx| {
2450 if phase == DispatchPhase::Bubble
2451 && interactive_bounds.visibly_contains(&event.position, cx)
2452 {
2453 editor.update(cx, |editor, cx| {
2454 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2455 });
2456 }
2457 }
2458 });
2459
2460 cx.on_mouse_event({
2461 let position_map = layout.position_map.clone();
2462 let editor = self.editor.clone();
2463 let stacking_order = cx.stacking_order().clone();
2464 let interactive_bounds = interactive_bounds.clone();
2465
2466 move |event: &MouseDownEvent, phase, cx| {
2467 if phase == DispatchPhase::Bubble
2468 && interactive_bounds.visibly_contains(&event.position, cx)
2469 {
2470 match event.button {
2471 MouseButton::Left => editor.update(cx, |editor, cx| {
2472 Self::mouse_left_down(
2473 editor,
2474 event,
2475 &position_map,
2476 text_bounds,
2477 gutter_bounds,
2478 &stacking_order,
2479 cx,
2480 );
2481 }),
2482 MouseButton::Right => editor.update(cx, |editor, cx| {
2483 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2484 }),
2485 _ => {}
2486 };
2487 }
2488 }
2489 });
2490
2491 cx.on_mouse_event({
2492 let position_map = layout.position_map.clone();
2493 let editor = self.editor.clone();
2494 let stacking_order = cx.stacking_order().clone();
2495 let interactive_bounds = interactive_bounds.clone();
2496
2497 move |event: &MouseUpEvent, phase, cx| {
2498 if phase == DispatchPhase::Bubble
2499 && interactive_bounds.visibly_contains(&event.position, cx)
2500 {
2501 editor.update(cx, |editor, cx| {
2502 Self::mouse_up(
2503 editor,
2504 event,
2505 &position_map,
2506 text_bounds,
2507 &stacking_order,
2508 cx,
2509 )
2510 });
2511 }
2512 }
2513 });
2514 cx.on_mouse_event({
2515 let position_map = layout.position_map.clone();
2516 let editor = self.editor.clone();
2517 let stacking_order = cx.stacking_order().clone();
2518
2519 move |event: &MouseMoveEvent, phase, cx| {
2520 if phase == DispatchPhase::Bubble
2521 && interactive_bounds.visibly_contains(&event.position, cx)
2522 {
2523 editor.update(cx, |editor, cx| {
2524 Self::mouse_moved(
2525 editor,
2526 event,
2527 &position_map,
2528 text_bounds,
2529 gutter_bounds,
2530 &stacking_order,
2531 cx,
2532 )
2533 });
2534 }
2535 }
2536 });
2537 }
2538}
2539
2540#[derive(Debug)]
2541pub struct LineWithInvisibles {
2542 pub line: ShapedLine,
2543 invisibles: Vec<Invisible>,
2544}
2545
2546impl LineWithInvisibles {
2547 fn from_chunks<'a>(
2548 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2549 text_style: &TextStyle,
2550 max_line_len: usize,
2551 max_line_count: usize,
2552 line_number_layouts: &[Option<ShapedLine>],
2553 editor_mode: EditorMode,
2554 cx: &WindowContext,
2555 ) -> Vec<Self> {
2556 let mut layouts = Vec::with_capacity(max_line_count);
2557 let mut line = String::new();
2558 let mut invisibles = Vec::new();
2559 let mut styles = Vec::new();
2560 let mut non_whitespace_added = false;
2561 let mut row = 0;
2562 let mut line_exceeded_max_len = false;
2563 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2564
2565 for highlighted_chunk in chunks.chain([HighlightedChunk {
2566 chunk: "\n",
2567 style: None,
2568 is_tab: false,
2569 }]) {
2570 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2571 if ix > 0 {
2572 let shaped_line = cx
2573 .text_system()
2574 .shape_line(line.clone().into(), font_size, &styles)
2575 .unwrap();
2576 layouts.push(Self {
2577 line: shaped_line,
2578 invisibles: invisibles.drain(..).collect(),
2579 });
2580
2581 line.clear();
2582 styles.clear();
2583 row += 1;
2584 line_exceeded_max_len = false;
2585 non_whitespace_added = false;
2586 if row == max_line_count {
2587 return layouts;
2588 }
2589 }
2590
2591 if !line_chunk.is_empty() && !line_exceeded_max_len {
2592 let text_style = if let Some(style) = highlighted_chunk.style {
2593 Cow::Owned(text_style.clone().highlight(style))
2594 } else {
2595 Cow::Borrowed(text_style)
2596 };
2597
2598 if line.len() + line_chunk.len() > max_line_len {
2599 let mut chunk_len = max_line_len - line.len();
2600 while !line_chunk.is_char_boundary(chunk_len) {
2601 chunk_len -= 1;
2602 }
2603 line_chunk = &line_chunk[..chunk_len];
2604 line_exceeded_max_len = true;
2605 }
2606
2607 styles.push(TextRun {
2608 len: line_chunk.len(),
2609 font: text_style.font(),
2610 color: text_style.color,
2611 background_color: text_style.background_color,
2612 underline: text_style.underline,
2613 });
2614
2615 if editor_mode == EditorMode::Full {
2616 // Line wrap pads its contents with fake whitespaces,
2617 // avoid printing them
2618 let inside_wrapped_string = line_number_layouts
2619 .get(row)
2620 .and_then(|layout| layout.as_ref())
2621 .is_none();
2622 if highlighted_chunk.is_tab {
2623 if non_whitespace_added || !inside_wrapped_string {
2624 invisibles.push(Invisible::Tab {
2625 line_start_offset: line.len(),
2626 });
2627 }
2628 } else {
2629 invisibles.extend(
2630 line_chunk
2631 .chars()
2632 .enumerate()
2633 .filter(|(_, line_char)| {
2634 let is_whitespace = line_char.is_whitespace();
2635 non_whitespace_added |= !is_whitespace;
2636 is_whitespace
2637 && (non_whitespace_added || !inside_wrapped_string)
2638 })
2639 .map(|(whitespace_index, _)| Invisible::Whitespace {
2640 line_offset: line.len() + whitespace_index,
2641 }),
2642 )
2643 }
2644 }
2645
2646 line.push_str(line_chunk);
2647 }
2648 }
2649 }
2650
2651 layouts
2652 }
2653
2654 fn draw(
2655 &self,
2656 layout: &LayoutState,
2657 row: u32,
2658 content_origin: gpui::Point<Pixels>,
2659 whitespace_setting: ShowWhitespaceSetting,
2660 selection_ranges: &[Range<DisplayPoint>],
2661 cx: &mut WindowContext,
2662 ) {
2663 let line_height = layout.position_map.line_height;
2664 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2665
2666 self.line.paint(
2667 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2668 line_height,
2669 cx,
2670 );
2671
2672 self.draw_invisibles(
2673 &selection_ranges,
2674 layout,
2675 content_origin,
2676 line_y,
2677 row,
2678 line_height,
2679 whitespace_setting,
2680 cx,
2681 );
2682 }
2683
2684 fn draw_invisibles(
2685 &self,
2686 selection_ranges: &[Range<DisplayPoint>],
2687 layout: &LayoutState,
2688 content_origin: gpui::Point<Pixels>,
2689 line_y: Pixels,
2690 row: u32,
2691 line_height: Pixels,
2692 whitespace_setting: ShowWhitespaceSetting,
2693 cx: &mut WindowContext,
2694 ) {
2695 let allowed_invisibles_regions = match whitespace_setting {
2696 ShowWhitespaceSetting::None => return,
2697 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2698 ShowWhitespaceSetting::All => None,
2699 };
2700
2701 for invisible in &self.invisibles {
2702 let (&token_offset, invisible_symbol) = match invisible {
2703 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2704 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2705 };
2706
2707 let x_offset = self.line.x_for_index(token_offset);
2708 let invisible_offset =
2709 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2710 let origin = content_origin
2711 + gpui::point(
2712 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2713 line_y,
2714 );
2715
2716 if let Some(allowed_regions) = allowed_invisibles_regions {
2717 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2718 if !allowed_regions
2719 .iter()
2720 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2721 {
2722 continue;
2723 }
2724 }
2725 invisible_symbol.paint(origin, line_height, cx);
2726 }
2727 }
2728}
2729
2730#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2731enum Invisible {
2732 Tab { line_start_offset: usize },
2733 Whitespace { line_offset: usize },
2734}
2735
2736impl Element for EditorElement {
2737 type State = ();
2738
2739 fn layout(
2740 &mut self,
2741 element_state: Option<Self::State>,
2742 cx: &mut gpui::WindowContext,
2743 ) -> (gpui::LayoutId, Self::State) {
2744 self.editor.update(cx, |editor, cx| {
2745 editor.set_style(self.style.clone(), cx);
2746
2747 let layout_id = match editor.mode {
2748 EditorMode::SingleLine => {
2749 let rem_size = cx.rem_size();
2750 let mut style = Style::default();
2751 style.size.width = relative(1.).into();
2752 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2753 cx.request_layout(&style, None)
2754 }
2755 EditorMode::AutoHeight { max_lines } => {
2756 let editor_handle = cx.view().clone();
2757 let max_line_number_width =
2758 self.max_line_number_width(&editor.snapshot(cx), cx);
2759 cx.request_measured_layout(
2760 Style::default(),
2761 move |known_dimensions, available_space, cx| {
2762 editor_handle
2763 .update(cx, |editor, cx| {
2764 compute_auto_height_layout(
2765 editor,
2766 max_lines,
2767 max_line_number_width,
2768 known_dimensions,
2769 cx,
2770 )
2771 })
2772 .unwrap_or_default()
2773 },
2774 )
2775 }
2776 EditorMode::Full => {
2777 let mut style = Style::default();
2778 style.size.width = relative(1.).into();
2779 style.size.height = relative(1.).into();
2780 cx.request_layout(&style, None)
2781 }
2782 };
2783
2784 (layout_id, ())
2785 })
2786 }
2787
2788 fn paint(
2789 &mut self,
2790 bounds: Bounds<gpui::Pixels>,
2791 element_state: &mut Self::State,
2792 cx: &mut gpui::WindowContext,
2793 ) {
2794 let editor = self.editor.clone();
2795
2796 let mut layout = self.compute_layout(bounds, cx);
2797 let gutter_bounds = Bounds {
2798 origin: bounds.origin,
2799 size: layout.gutter_size,
2800 };
2801 let text_bounds = Bounds {
2802 origin: gutter_bounds.upper_right(),
2803 size: layout.text_size,
2804 };
2805
2806 let focus_handle = editor.focus_handle(cx);
2807 let key_context = self.editor.read(cx).key_context(cx);
2808 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2809 self.register_actions(cx);
2810 self.register_key_listeners(cx);
2811
2812 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2813 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2814 cx.handle_input(&focus_handle, input_handler);
2815
2816 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2817 if layout.gutter_size.width > Pixels::ZERO {
2818 self.paint_gutter(gutter_bounds, &mut layout, cx);
2819 }
2820 self.paint_text(text_bounds, &mut layout, cx);
2821
2822 cx.with_z_index(0, |cx| {
2823 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2824
2825 if !layout.blocks.is_empty() {
2826 cx.with_element_id(Some("editor_blocks"), |cx| {
2827 self.paint_blocks(bounds, &mut layout, cx);
2828 });
2829 }
2830 });
2831
2832 cx.with_z_index(1, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2833
2834 cx.with_z_index(2, |cx| {
2835 self.paint_overlays(text_bounds, &mut layout, cx);
2836 });
2837 });
2838 })
2839 }
2840}
2841
2842impl IntoElement for EditorElement {
2843 type Element = Self;
2844
2845 fn element_id(&self) -> Option<gpui::ElementId> {
2846 self.editor.element_id()
2847 }
2848
2849 fn into_element(self) -> Self::Element {
2850 self
2851 }
2852}
2853
2854type BufferRow = u32;
2855
2856pub struct LayoutState {
2857 position_map: Arc<PositionMap>,
2858 gutter_size: Size<Pixels>,
2859 gutter_padding: Pixels,
2860 gutter_margin: Pixels,
2861 text_size: gpui::Size<Pixels>,
2862 mode: EditorMode,
2863 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2864 visible_anchor_range: Range<Anchor>,
2865 visible_display_row_range: Range<u32>,
2866 active_rows: BTreeMap<u32, bool>,
2867 highlighted_rows: Option<Range<u32>>,
2868 line_numbers: Vec<Option<ShapedLine>>,
2869 display_hunks: Vec<DisplayDiffHunk>,
2870 blocks: Vec<BlockLayout>,
2871 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2872 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2873 scrollbar_row_range: Range<f32>,
2874 show_scrollbars: bool,
2875 is_singleton: bool,
2876 max_row: u32,
2877 context_menu: Option<(DisplayPoint, AnyElement)>,
2878 code_actions_indicator: Option<CodeActionsIndicator>,
2879 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2880 fold_indicators: Vec<Option<IconButton>>,
2881 tab_invisible: ShapedLine,
2882 space_invisible: ShapedLine,
2883}
2884
2885struct CodeActionsIndicator {
2886 row: u32,
2887 button: IconButton,
2888}
2889
2890struct PositionMap {
2891 size: Size<Pixels>,
2892 line_height: Pixels,
2893 scroll_position: gpui::Point<Pixels>,
2894 scroll_max: gpui::Point<f32>,
2895 em_width: Pixels,
2896 em_advance: Pixels,
2897 line_layouts: Vec<LineWithInvisibles>,
2898 snapshot: EditorSnapshot,
2899}
2900
2901#[derive(Debug, Copy, Clone)]
2902pub struct PointForPosition {
2903 pub previous_valid: DisplayPoint,
2904 pub next_valid: DisplayPoint,
2905 pub exact_unclipped: DisplayPoint,
2906 pub column_overshoot_after_line_end: u32,
2907}
2908
2909impl PointForPosition {
2910 #[cfg(test)]
2911 pub fn valid(valid: DisplayPoint) -> Self {
2912 Self {
2913 previous_valid: valid,
2914 next_valid: valid,
2915 exact_unclipped: valid,
2916 column_overshoot_after_line_end: 0,
2917 }
2918 }
2919
2920 pub fn as_valid(&self) -> Option<DisplayPoint> {
2921 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2922 Some(self.previous_valid)
2923 } else {
2924 None
2925 }
2926 }
2927}
2928
2929impl PositionMap {
2930 fn point_for_position(
2931 &self,
2932 text_bounds: Bounds<Pixels>,
2933 position: gpui::Point<Pixels>,
2934 ) -> PointForPosition {
2935 let scroll_position = self.snapshot.scroll_position();
2936 let position = position - text_bounds.origin;
2937 let y = position.y.max(px(0.)).min(self.size.height);
2938 let x = position.x + (scroll_position.x * self.em_width);
2939 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2940
2941 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2942 .line_layouts
2943 .get(row as usize - scroll_position.y as usize)
2944 .map(|&LineWithInvisibles { ref line, .. }| line)
2945 {
2946 if let Some(ix) = line.index_for_x(x) {
2947 (ix as u32, px(0.))
2948 } else {
2949 (line.len as u32, px(0.).max(x - line.width))
2950 }
2951 } else {
2952 (0, x)
2953 };
2954
2955 let mut exact_unclipped = DisplayPoint::new(row, column);
2956 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2957 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2958
2959 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2960 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2961 PointForPosition {
2962 previous_valid,
2963 next_valid,
2964 exact_unclipped,
2965 column_overshoot_after_line_end,
2966 }
2967 }
2968}
2969
2970struct BlockLayout {
2971 row: u32,
2972 element: AnyElement,
2973 available_space: Size<AvailableSpace>,
2974 style: BlockStyle,
2975}
2976
2977fn layout_line(
2978 row: u32,
2979 snapshot: &EditorSnapshot,
2980 style: &EditorStyle,
2981 cx: &WindowContext,
2982) -> Result<ShapedLine> {
2983 let mut line = snapshot.line(row);
2984
2985 if line.len() > MAX_LINE_LEN {
2986 let mut len = MAX_LINE_LEN;
2987 while !line.is_char_boundary(len) {
2988 len -= 1;
2989 }
2990
2991 line.truncate(len);
2992 }
2993
2994 cx.text_system().shape_line(
2995 line.into(),
2996 style.text.font_size.to_pixels(cx.rem_size()),
2997 &[TextRun {
2998 len: snapshot.line_len(row) as usize,
2999 font: style.text.font(),
3000 color: Hsla::default(),
3001 background_color: None,
3002 underline: None,
3003 }],
3004 )
3005}
3006
3007#[derive(Debug)]
3008pub struct Cursor {
3009 origin: gpui::Point<Pixels>,
3010 block_width: Pixels,
3011 line_height: Pixels,
3012 color: Hsla,
3013 shape: CursorShape,
3014 block_text: Option<ShapedLine>,
3015}
3016
3017impl Cursor {
3018 pub fn new(
3019 origin: gpui::Point<Pixels>,
3020 block_width: Pixels,
3021 line_height: Pixels,
3022 color: Hsla,
3023 shape: CursorShape,
3024 block_text: Option<ShapedLine>,
3025 ) -> Cursor {
3026 Cursor {
3027 origin,
3028 block_width,
3029 line_height,
3030 color,
3031 shape,
3032 block_text,
3033 }
3034 }
3035
3036 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3037 Bounds {
3038 origin: self.origin + origin,
3039 size: size(self.block_width, self.line_height),
3040 }
3041 }
3042
3043 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3044 let bounds = match self.shape {
3045 CursorShape::Bar => Bounds {
3046 origin: self.origin + origin,
3047 size: size(px(2.0), self.line_height),
3048 },
3049 CursorShape::Block | CursorShape::Hollow => Bounds {
3050 origin: self.origin + origin,
3051 size: size(self.block_width, self.line_height),
3052 },
3053 CursorShape::Underscore => Bounds {
3054 origin: self.origin
3055 + origin
3056 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3057 size: size(self.block_width, px(2.0)),
3058 },
3059 };
3060
3061 //Draw background or border quad
3062 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3063 outline(bounds, self.color)
3064 } else {
3065 fill(bounds, self.color)
3066 };
3067
3068 cx.paint_quad(cursor);
3069
3070 if let Some(block_text) = &self.block_text {
3071 block_text.paint(self.origin + origin, self.line_height, cx);
3072 }
3073 }
3074
3075 pub fn shape(&self) -> CursorShape {
3076 self.shape
3077 }
3078}
3079
3080#[derive(Debug)]
3081pub struct HighlightedRange {
3082 pub start_y: Pixels,
3083 pub line_height: Pixels,
3084 pub lines: Vec<HighlightedRangeLine>,
3085 pub color: Hsla,
3086 pub corner_radius: Pixels,
3087}
3088
3089#[derive(Debug)]
3090pub struct HighlightedRangeLine {
3091 pub start_x: Pixels,
3092 pub end_x: Pixels,
3093}
3094
3095impl HighlightedRange {
3096 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3097 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3098 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3099 self.paint_lines(
3100 self.start_y + self.line_height,
3101 &self.lines[1..],
3102 bounds,
3103 cx,
3104 );
3105 } else {
3106 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3107 }
3108 }
3109
3110 fn paint_lines(
3111 &self,
3112 start_y: Pixels,
3113 lines: &[HighlightedRangeLine],
3114 bounds: Bounds<Pixels>,
3115 cx: &mut WindowContext,
3116 ) {
3117 if lines.is_empty() {
3118 return;
3119 }
3120
3121 let first_line = lines.first().unwrap();
3122 let last_line = lines.last().unwrap();
3123
3124 let first_top_left = point(first_line.start_x, start_y);
3125 let first_top_right = point(first_line.end_x, start_y);
3126
3127 let curve_height = point(Pixels::ZERO, self.corner_radius);
3128 let curve_width = |start_x: Pixels, end_x: Pixels| {
3129 let max = (end_x - start_x) / 2.;
3130 let width = if max < self.corner_radius {
3131 max
3132 } else {
3133 self.corner_radius
3134 };
3135
3136 point(width, Pixels::ZERO)
3137 };
3138
3139 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3140 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3141 path.curve_to(first_top_right + curve_height, first_top_right);
3142
3143 let mut iter = lines.iter().enumerate().peekable();
3144 while let Some((ix, line)) = iter.next() {
3145 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3146
3147 if let Some((_, next_line)) = iter.peek() {
3148 let next_top_right = point(next_line.end_x, bottom_right.y);
3149
3150 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3151 Ordering::Equal => {
3152 path.line_to(bottom_right);
3153 }
3154 Ordering::Less => {
3155 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3156 path.line_to(bottom_right - curve_height);
3157 if self.corner_radius > Pixels::ZERO {
3158 path.curve_to(bottom_right - curve_width, bottom_right);
3159 }
3160 path.line_to(next_top_right + curve_width);
3161 if self.corner_radius > Pixels::ZERO {
3162 path.curve_to(next_top_right + curve_height, next_top_right);
3163 }
3164 }
3165 Ordering::Greater => {
3166 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3167 path.line_to(bottom_right - curve_height);
3168 if self.corner_radius > Pixels::ZERO {
3169 path.curve_to(bottom_right + curve_width, bottom_right);
3170 }
3171 path.line_to(next_top_right - curve_width);
3172 if self.corner_radius > Pixels::ZERO {
3173 path.curve_to(next_top_right + curve_height, next_top_right);
3174 }
3175 }
3176 }
3177 } else {
3178 let curve_width = curve_width(line.start_x, line.end_x);
3179 path.line_to(bottom_right - curve_height);
3180 if self.corner_radius > Pixels::ZERO {
3181 path.curve_to(bottom_right - curve_width, bottom_right);
3182 }
3183
3184 let bottom_left = point(line.start_x, bottom_right.y);
3185 path.line_to(bottom_left + curve_width);
3186 if self.corner_radius > Pixels::ZERO {
3187 path.curve_to(bottom_left - curve_height, bottom_left);
3188 }
3189 }
3190 }
3191
3192 if first_line.start_x > last_line.start_x {
3193 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3194 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3195 path.line_to(second_top_left + curve_height);
3196 if self.corner_radius > Pixels::ZERO {
3197 path.curve_to(second_top_left + curve_width, second_top_left);
3198 }
3199 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3200 path.line_to(first_bottom_left - curve_width);
3201 if self.corner_radius > Pixels::ZERO {
3202 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3203 }
3204 }
3205
3206 path.line_to(first_top_left + curve_height);
3207 if self.corner_radius > Pixels::ZERO {
3208 path.curve_to(first_top_left + top_curve_width, first_top_left);
3209 }
3210 path.line_to(first_top_right - top_curve_width);
3211
3212 cx.paint_path(path, self.color);
3213 }
3214}
3215
3216pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3217 (delta.pow(1.5) / 100.0).into()
3218}
3219
3220fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3221 (delta.pow(1.2) / 300.0).into()
3222}
3223
3224#[cfg(test)]
3225mod tests {
3226 use super::*;
3227 use crate::{
3228 display_map::{BlockDisposition, BlockProperties},
3229 editor_tests::{init_test, update_test_language_settings},
3230 Editor, MultiBuffer,
3231 };
3232 use gpui::{EmptyView, TestAppContext};
3233 use language::language_settings;
3234 use log::info;
3235 use std::{num::NonZeroU32, sync::Arc};
3236 use util::test::sample_text;
3237
3238 #[gpui::test]
3239 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3240 init_test(cx, |_| {});
3241 let window = cx.add_window(|cx| {
3242 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3243 Editor::new(EditorMode::Full, buffer, None, cx)
3244 });
3245
3246 let editor = window.root(cx).unwrap();
3247 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3248 let element = EditorElement::new(&editor, style);
3249
3250 let layouts = window
3251 .update(cx, |editor, cx| {
3252 let snapshot = editor.snapshot(cx);
3253 element
3254 .shape_line_numbers(
3255 0..6,
3256 &Default::default(),
3257 DisplayPoint::new(0, 0),
3258 false,
3259 &snapshot,
3260 cx,
3261 )
3262 .0
3263 })
3264 .unwrap();
3265 assert_eq!(layouts.len(), 6);
3266
3267 let relative_rows = window
3268 .update(cx, |editor, cx| {
3269 let snapshot = editor.snapshot(cx);
3270 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3271 })
3272 .unwrap();
3273 assert_eq!(relative_rows[&0], 3);
3274 assert_eq!(relative_rows[&1], 2);
3275 assert_eq!(relative_rows[&2], 1);
3276 // current line has no relative number
3277 assert_eq!(relative_rows[&4], 1);
3278 assert_eq!(relative_rows[&5], 2);
3279
3280 // works if cursor is before screen
3281 let relative_rows = window
3282 .update(cx, |editor, cx| {
3283 let snapshot = editor.snapshot(cx);
3284
3285 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3286 })
3287 .unwrap();
3288 assert_eq!(relative_rows.len(), 3);
3289 assert_eq!(relative_rows[&3], 2);
3290 assert_eq!(relative_rows[&4], 3);
3291 assert_eq!(relative_rows[&5], 4);
3292
3293 // works if cursor is after screen
3294 let relative_rows = window
3295 .update(cx, |editor, cx| {
3296 let snapshot = editor.snapshot(cx);
3297
3298 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3299 })
3300 .unwrap();
3301 assert_eq!(relative_rows.len(), 3);
3302 assert_eq!(relative_rows[&0], 5);
3303 assert_eq!(relative_rows[&1], 4);
3304 assert_eq!(relative_rows[&2], 3);
3305 }
3306
3307 #[gpui::test]
3308 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3309 init_test(cx, |_| {});
3310
3311 let window = cx.add_window(|cx| {
3312 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3313 Editor::new(EditorMode::Full, buffer, None, cx)
3314 });
3315 let editor = window.root(cx).unwrap();
3316 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3317 let mut element = EditorElement::new(&editor, style);
3318
3319 window
3320 .update(cx, |editor, cx| {
3321 editor.cursor_shape = CursorShape::Block;
3322 editor.change_selections(None, cx, |s| {
3323 s.select_ranges([
3324 Point::new(0, 0)..Point::new(1, 0),
3325 Point::new(3, 2)..Point::new(3, 3),
3326 Point::new(5, 6)..Point::new(6, 0),
3327 ]);
3328 });
3329 })
3330 .unwrap();
3331 let state = cx
3332 .update_window(window.into(), |_, cx| {
3333 element.compute_layout(
3334 Bounds {
3335 origin: point(px(500.), px(500.)),
3336 size: size(px(500.), px(500.)),
3337 },
3338 cx,
3339 )
3340 })
3341 .unwrap();
3342
3343 assert_eq!(state.selections.len(), 1);
3344 let local_selections = &state.selections[0].1;
3345 assert_eq!(local_selections.len(), 3);
3346 // moves cursor back one line
3347 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3348 assert_eq!(
3349 local_selections[0].range,
3350 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3351 );
3352
3353 // moves cursor back one column
3354 assert_eq!(
3355 local_selections[1].range,
3356 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3357 );
3358 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3359
3360 // leaves cursor on the max point
3361 assert_eq!(
3362 local_selections[2].range,
3363 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3364 );
3365 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3366
3367 // active lines does not include 1 (even though the range of the selection does)
3368 assert_eq!(
3369 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3370 vec![0, 3, 5, 6]
3371 );
3372
3373 // multi-buffer support
3374 // in DisplayPoint co-ordinates, this is what we're dealing with:
3375 // 0: [[file
3376 // 1: header]]
3377 // 2: aaaaaa
3378 // 3: bbbbbb
3379 // 4: cccccc
3380 // 5:
3381 // 6: ...
3382 // 7: ffffff
3383 // 8: gggggg
3384 // 9: hhhhhh
3385 // 10:
3386 // 11: [[file
3387 // 12: header]]
3388 // 13: bbbbbb
3389 // 14: cccccc
3390 // 15: dddddd
3391 let window = cx.add_window(|cx| {
3392 let buffer = MultiBuffer::build_multi(
3393 [
3394 (
3395 &(sample_text(8, 6, 'a') + "\n"),
3396 vec![
3397 Point::new(0, 0)..Point::new(3, 0),
3398 Point::new(4, 0)..Point::new(7, 0),
3399 ],
3400 ),
3401 (
3402 &(sample_text(8, 6, 'a') + "\n"),
3403 vec![Point::new(1, 0)..Point::new(3, 0)],
3404 ),
3405 ],
3406 cx,
3407 );
3408 Editor::new(EditorMode::Full, buffer, None, cx)
3409 });
3410 let editor = window.root(cx).unwrap();
3411 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3412 let mut element = EditorElement::new(&editor, style);
3413 let state = window.update(cx, |editor, cx| {
3414 editor.cursor_shape = CursorShape::Block;
3415 editor.change_selections(None, cx, |s| {
3416 s.select_display_ranges([
3417 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3418 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3419 ]);
3420 });
3421 });
3422
3423 let state = cx
3424 .update_window(window.into(), |_, cx| {
3425 element.compute_layout(
3426 Bounds {
3427 origin: point(px(500.), px(500.)),
3428 size: size(px(500.), px(500.)),
3429 },
3430 cx,
3431 )
3432 })
3433 .unwrap();
3434 assert_eq!(state.selections.len(), 1);
3435 let local_selections = &state.selections[0].1;
3436 assert_eq!(local_selections.len(), 2);
3437
3438 // moves cursor on excerpt boundary back a line
3439 // and doesn't allow selection to bleed through
3440 assert_eq!(
3441 local_selections[0].range,
3442 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3443 );
3444 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3445 // moves cursor on buffer boundary back two lines
3446 // and doesn't allow selection to bleed through
3447 assert_eq!(
3448 local_selections[1].range,
3449 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3450 );
3451 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3452 }
3453
3454 #[gpui::test]
3455 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3456 init_test(cx, |_| {});
3457
3458 let window = cx.add_window(|cx| {
3459 let buffer = MultiBuffer::build_simple("", cx);
3460 Editor::new(EditorMode::Full, buffer, None, cx)
3461 });
3462 let editor = window.root(cx).unwrap();
3463 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3464 window
3465 .update(cx, |editor, cx| {
3466 editor.set_placeholder_text("hello", cx);
3467 editor.insert_blocks(
3468 [BlockProperties {
3469 style: BlockStyle::Fixed,
3470 disposition: BlockDisposition::Above,
3471 height: 3,
3472 position: Anchor::min(),
3473 render: Arc::new(|_| div().into_any()),
3474 }],
3475 None,
3476 cx,
3477 );
3478
3479 // Blur the editor so that it displays placeholder text.
3480 cx.blur();
3481 })
3482 .unwrap();
3483
3484 let mut element = EditorElement::new(&editor, style);
3485 let mut state = cx
3486 .update_window(window.into(), |_, cx| {
3487 element.compute_layout(
3488 Bounds {
3489 origin: point(px(500.), px(500.)),
3490 size: size(px(500.), px(500.)),
3491 },
3492 cx,
3493 )
3494 })
3495 .unwrap();
3496 let size = state.position_map.size;
3497
3498 assert_eq!(state.position_map.line_layouts.len(), 4);
3499 assert_eq!(
3500 state
3501 .line_numbers
3502 .iter()
3503 .map(Option::is_some)
3504 .collect::<Vec<_>>(),
3505 &[false, false, false, true]
3506 );
3507
3508 // Don't panic.
3509 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3510 cx.update_window(window.into(), |_, cx| {
3511 element.paint(bounds, &mut (), cx);
3512 })
3513 .unwrap()
3514 }
3515
3516 #[gpui::test]
3517 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3518 const TAB_SIZE: u32 = 4;
3519
3520 let input_text = "\t \t|\t| a b";
3521 let expected_invisibles = vec![
3522 Invisible::Tab {
3523 line_start_offset: 0,
3524 },
3525 Invisible::Whitespace {
3526 line_offset: TAB_SIZE as usize,
3527 },
3528 Invisible::Tab {
3529 line_start_offset: TAB_SIZE as usize + 1,
3530 },
3531 Invisible::Tab {
3532 line_start_offset: TAB_SIZE as usize * 2 + 1,
3533 },
3534 Invisible::Whitespace {
3535 line_offset: TAB_SIZE as usize * 3 + 1,
3536 },
3537 Invisible::Whitespace {
3538 line_offset: TAB_SIZE as usize * 3 + 3,
3539 },
3540 ];
3541 assert_eq!(
3542 expected_invisibles.len(),
3543 input_text
3544 .chars()
3545 .filter(|initial_char| initial_char.is_whitespace())
3546 .count(),
3547 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3548 );
3549
3550 init_test(cx, |s| {
3551 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3552 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3553 });
3554
3555 let actual_invisibles =
3556 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3557
3558 assert_eq!(expected_invisibles, actual_invisibles);
3559 }
3560
3561 #[gpui::test]
3562 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3563 init_test(cx, |s| {
3564 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3565 s.defaults.tab_size = NonZeroU32::new(4);
3566 });
3567
3568 for editor_mode_without_invisibles in [
3569 EditorMode::SingleLine,
3570 EditorMode::AutoHeight { max_lines: 100 },
3571 ] {
3572 let invisibles = collect_invisibles_from_new_editor(
3573 cx,
3574 editor_mode_without_invisibles,
3575 "\t\t\t| | a b",
3576 px(500.0),
3577 );
3578 assert!(invisibles.is_empty(),
3579 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3580 }
3581 }
3582
3583 #[gpui::test]
3584 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3585 let tab_size = 4;
3586 let input_text = "a\tbcd ".repeat(9);
3587 let repeated_invisibles = [
3588 Invisible::Tab {
3589 line_start_offset: 1,
3590 },
3591 Invisible::Whitespace {
3592 line_offset: tab_size as usize + 3,
3593 },
3594 Invisible::Whitespace {
3595 line_offset: tab_size as usize + 4,
3596 },
3597 Invisible::Whitespace {
3598 line_offset: tab_size as usize + 5,
3599 },
3600 ];
3601 let expected_invisibles = std::iter::once(repeated_invisibles)
3602 .cycle()
3603 .take(9)
3604 .flatten()
3605 .collect::<Vec<_>>();
3606 assert_eq!(
3607 expected_invisibles.len(),
3608 input_text
3609 .chars()
3610 .filter(|initial_char| initial_char.is_whitespace())
3611 .count(),
3612 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3613 );
3614 info!("Expected invisibles: {expected_invisibles:?}");
3615
3616 init_test(cx, |_| {});
3617
3618 // Put the same string with repeating whitespace pattern into editors of various size,
3619 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3620 let resize_step = 10.0;
3621 let mut editor_width = 200.0;
3622 while editor_width <= 1000.0 {
3623 update_test_language_settings(cx, |s| {
3624 s.defaults.tab_size = NonZeroU32::new(tab_size);
3625 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3626 s.defaults.preferred_line_length = Some(editor_width as u32);
3627 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3628 });
3629
3630 let actual_invisibles = collect_invisibles_from_new_editor(
3631 cx,
3632 EditorMode::Full,
3633 &input_text,
3634 px(editor_width),
3635 );
3636
3637 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3638 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3639 let mut i = 0;
3640 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3641 i = actual_index;
3642 match expected_invisibles.get(i) {
3643 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3644 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3645 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3646 _ => {
3647 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3648 }
3649 },
3650 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3651 }
3652 }
3653 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3654 assert!(
3655 missing_expected_invisibles.is_empty(),
3656 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3657 );
3658
3659 editor_width += resize_step;
3660 }
3661 }
3662
3663 fn collect_invisibles_from_new_editor(
3664 cx: &mut TestAppContext,
3665 editor_mode: EditorMode,
3666 input_text: &str,
3667 editor_width: Pixels,
3668 ) -> Vec<Invisible> {
3669 info!(
3670 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3671 editor_width.0
3672 );
3673 let window = cx.add_window(|cx| {
3674 let buffer = MultiBuffer::build_simple(&input_text, cx);
3675 Editor::new(editor_mode, buffer, None, cx)
3676 });
3677 let editor = window.root(cx).unwrap();
3678 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3679 let mut element = EditorElement::new(&editor, style);
3680 window
3681 .update(cx, |editor, cx| {
3682 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3683 editor.set_wrap_width(Some(editor_width), cx);
3684 })
3685 .unwrap();
3686 let layout_state = cx
3687 .update_window(window.into(), |_, cx| {
3688 element.compute_layout(
3689 Bounds {
3690 origin: point(px(500.), px(500.)),
3691 size: size(px(500.), px(500.)),
3692 },
3693 cx,
3694 )
3695 })
3696 .unwrap();
3697
3698 layout_state
3699 .position_map
3700 .line_layouts
3701 .iter()
3702 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3703 .flatten()
3704 .cloned()
3705 .collect()
3706 }
3707}
3708
3709pub fn register_action<T: Action>(
3710 view: &View<Editor>,
3711 cx: &mut WindowContext,
3712 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3713) {
3714 let view = view.clone();
3715 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3716 let action = action.downcast_ref().unwrap();
3717 if phase == DispatchPhase::Bubble {
3718 view.update(cx, |editor, cx| {
3719 listener(editor, action, cx);
3720 })
3721 }
3722 })
3723}
3724
3725fn compute_auto_height_layout(
3726 editor: &mut Editor,
3727 max_lines: usize,
3728 max_line_number_width: Pixels,
3729 known_dimensions: Size<Option<Pixels>>,
3730 cx: &mut ViewContext<Editor>,
3731) -> Option<Size<Pixels>> {
3732 let mut width = known_dimensions.width?;
3733 if let Some(height) = known_dimensions.height {
3734 return Some(size(width, height));
3735 }
3736
3737 let style = editor.style.as_ref().unwrap();
3738 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3739 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3740 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3741 let em_width = cx
3742 .text_system()
3743 .typographic_bounds(font_id, font_size, 'm')
3744 .unwrap()
3745 .size
3746 .width;
3747
3748 let mut snapshot = editor.snapshot(cx);
3749 let gutter_padding;
3750 let gutter_width;
3751 let gutter_margin;
3752 if snapshot.show_gutter {
3753 let descent = cx.text_system().descent(font_id, font_size);
3754 let gutter_padding_factor = 3.5;
3755 gutter_padding = (em_width * gutter_padding_factor).round();
3756 gutter_width = max_line_number_width + gutter_padding * 2.0;
3757 gutter_margin = -descent;
3758 } else {
3759 gutter_padding = Pixels::ZERO;
3760 gutter_width = Pixels::ZERO;
3761 gutter_margin = Pixels::ZERO;
3762 };
3763
3764 editor.gutter_width = gutter_width;
3765 let text_width = width - gutter_width;
3766 let overscroll = size(em_width, px(0.));
3767
3768 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3769 if editor.set_wrap_width(Some(editor_width), cx) {
3770 snapshot = editor.snapshot(cx);
3771 }
3772
3773 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3774 let height = scroll_height
3775 .max(line_height)
3776 .min(line_height * max_lines as f32);
3777
3778 Some(size(width, height))
3779}