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_dragged(
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 if !editor.has_pending_selection() {
501 return;
502 }
503
504 let point_for_position = position_map.point_for_position(text_bounds, event.position);
505 let mut scroll_delta = gpui::Point::<f32>::default();
506 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
507 let top = text_bounds.origin.y + vertical_margin;
508 let bottom = text_bounds.lower_left().y - vertical_margin;
509 if event.position.y < top {
510 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
511 }
512 if event.position.y > bottom {
513 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
514 }
515
516 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
517 let left = text_bounds.origin.x + horizontal_margin;
518 let right = text_bounds.upper_right().x - horizontal_margin;
519 if event.position.x < left {
520 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
521 }
522 if event.position.x > right {
523 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
524 }
525
526 editor.select(
527 SelectPhase::Update {
528 position: point_for_position.previous_valid,
529 goal_column: point_for_position.exact_unclipped.column(),
530 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
531 .clamp(&gpui::Point::default(), &position_map.scroll_max),
532 },
533 cx,
534 );
535 }
536
537 fn mouse_moved(
538 editor: &mut Editor,
539 event: &MouseMoveEvent,
540 position_map: &PositionMap,
541 text_bounds: Bounds<Pixels>,
542 gutter_bounds: Bounds<Pixels>,
543 stacking_order: &StackingOrder,
544 cx: &mut ViewContext<Editor>,
545 ) {
546 let modifiers = event.modifiers;
547 let text_hovered = text_bounds.contains(&event.position);
548 let gutter_hovered = gutter_bounds.contains(&event.position);
549 let was_top = cx.was_top_layer(&event.position, stacking_order);
550
551 editor.set_gutter_hovered(gutter_hovered, cx);
552
553 // Don't trigger hover popover if mouse is hovering over context menu
554 if text_hovered && was_top {
555 let point_for_position = position_map.point_for_position(text_bounds, event.position);
556
557 match point_for_position.as_valid() {
558 Some(point) => {
559 update_go_to_definition_link(
560 editor,
561 Some(GoToDefinitionTrigger::Text(point)),
562 modifiers.command,
563 modifiers.shift,
564 cx,
565 );
566 hover_at(editor, Some(point), cx);
567 }
568 None => {
569 update_inlay_link_and_hover_points(
570 &position_map.snapshot,
571 point_for_position,
572 editor,
573 modifiers.command,
574 modifiers.shift,
575 cx,
576 );
577 }
578 }
579
580 cx.stop_propagation();
581 } else {
582 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
583 hover_at(editor, None, cx);
584 if gutter_hovered && was_top {
585 cx.stop_propagation();
586 }
587 }
588 }
589
590 fn scroll(
591 editor: &mut Editor,
592 event: &ScrollWheelEvent,
593 position_map: &PositionMap,
594 bounds: &InteractiveBounds,
595 cx: &mut ViewContext<Editor>,
596 ) {
597 if !bounds.visibly_contains(&event.position, cx) {
598 return;
599 }
600
601 let line_height = position_map.line_height;
602 let max_glyph_width = position_map.em_width;
603 let (delta, axis) = match event.delta {
604 gpui::ScrollDelta::Pixels(mut pixels) => {
605 //Trackpad
606 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
607 (pixels, axis)
608 }
609
610 gpui::ScrollDelta::Lines(lines) => {
611 //Not trackpad
612 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
613 (pixels, None)
614 }
615 };
616
617 let scroll_position = position_map.snapshot.scroll_position();
618 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
619 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
620 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
621 editor.scroll(scroll_position, axis, cx);
622 cx.stop_propagation();
623 }
624
625 fn paint_background(
626 &self,
627 gutter_bounds: Bounds<Pixels>,
628 text_bounds: Bounds<Pixels>,
629 layout: &LayoutState,
630 cx: &mut WindowContext,
631 ) {
632 let bounds = gutter_bounds.union(&text_bounds);
633 let scroll_top =
634 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
635 let gutter_bg = cx.theme().colors().editor_gutter_background;
636 cx.paint_quad(fill(gutter_bounds, gutter_bg));
637 cx.paint_quad(fill(text_bounds, self.style.background));
638
639 if let EditorMode::Full = layout.mode {
640 let mut active_rows = layout.active_rows.iter().peekable();
641 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
642 let mut end_row = *start_row;
643 while active_rows.peek().map_or(false, |r| {
644 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
645 }) {
646 active_rows.next().unwrap();
647 end_row += 1;
648 }
649
650 if !contains_non_empty_selection {
651 let origin = point(
652 bounds.origin.x,
653 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
654 - scroll_top,
655 );
656 let size = size(
657 bounds.size.width,
658 layout.position_map.line_height * (end_row - start_row + 1) as f32,
659 );
660 let active_line_bg = cx.theme().colors().editor_active_line_background;
661 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
662 }
663 }
664
665 if let Some(highlighted_rows) = &layout.highlighted_rows {
666 let origin = point(
667 bounds.origin.x,
668 bounds.origin.y
669 + (layout.position_map.line_height * highlighted_rows.start as f32)
670 - scroll_top,
671 );
672 let size = size(
673 bounds.size.width,
674 layout.position_map.line_height * highlighted_rows.len() as f32,
675 );
676 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
677 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
678 }
679
680 let scroll_left =
681 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
682
683 for (wrap_position, active) in layout.wrap_guides.iter() {
684 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
685 - scroll_left;
686
687 if x < text_bounds.origin.x
688 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
689 {
690 continue;
691 }
692
693 let color = if *active {
694 cx.theme().colors().editor_active_wrap_guide
695 } else {
696 cx.theme().colors().editor_wrap_guide
697 };
698 cx.paint_quad(fill(
699 Bounds {
700 origin: point(x, text_bounds.origin.y),
701 size: size(px(1.), text_bounds.size.height),
702 },
703 color,
704 ));
705 }
706 }
707 }
708
709 fn paint_gutter(
710 &mut self,
711 bounds: Bounds<Pixels>,
712 layout: &mut LayoutState,
713 cx: &mut WindowContext,
714 ) {
715 let line_height = layout.position_map.line_height;
716
717 let scroll_position = layout.position_map.snapshot.scroll_position();
718 let scroll_top = scroll_position.y * line_height;
719
720 let show_gutter = matches!(
721 ProjectSettings::get_global(cx).git.git_gutter,
722 Some(GitGutterSetting::TrackedFiles)
723 );
724
725 if show_gutter {
726 Self::paint_diff_hunks(bounds, layout, cx);
727 }
728
729 for (ix, line) in layout.line_numbers.iter().enumerate() {
730 if let Some(line) = line {
731 let line_origin = bounds.origin
732 + point(
733 bounds.size.width - line.width - layout.gutter_padding,
734 ix as f32 * line_height - (scroll_top % line_height),
735 );
736
737 line.paint(line_origin, line_height, cx);
738 }
739 }
740
741 cx.with_z_index(1, |cx| {
742 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
743 if let Some(mut fold_indicator) = fold_indicator {
744 let mut fold_indicator = fold_indicator.into_any_element();
745 let available_space = size(
746 AvailableSpace::MinContent,
747 AvailableSpace::Definite(line_height * 0.55),
748 );
749 let fold_indicator_size = fold_indicator.measure(available_space, cx);
750
751 let position = point(
752 bounds.size.width - layout.gutter_padding,
753 ix as f32 * line_height - (scroll_top % line_height),
754 );
755 let centering_offset = point(
756 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
757 / 2.,
758 (line_height - fold_indicator_size.height) / 2.,
759 );
760 let origin = bounds.origin + position + centering_offset;
761 fold_indicator.draw(origin, available_space, cx);
762 }
763 }
764
765 if let Some(indicator) = layout.code_actions_indicator.take() {
766 let mut button = indicator.button.into_any_element();
767 let available_space = size(
768 AvailableSpace::MinContent,
769 AvailableSpace::Definite(line_height),
770 );
771 let indicator_size = button.measure(available_space, cx);
772
773 let mut x = Pixels::ZERO;
774 let mut y = indicator.row as f32 * line_height - scroll_top;
775 // Center indicator.
776 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
777 y += (line_height - indicator_size.height) / 2.;
778
779 button.draw(bounds.origin + point(x, y), available_space, cx);
780 }
781 });
782 }
783
784 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
785 let line_height = layout.position_map.line_height;
786
787 let scroll_position = layout.position_map.snapshot.scroll_position();
788 let scroll_top = scroll_position.y * line_height;
789
790 for hunk in &layout.display_hunks {
791 let (display_row_range, status) = match hunk {
792 //TODO: This rendering is entirely a horrible hack
793 &DisplayDiffHunk::Folded { display_row: row } => {
794 let start_y = row as f32 * line_height - scroll_top;
795 let end_y = start_y + line_height;
796
797 let width = 0.275 * line_height;
798 let highlight_origin = bounds.origin + point(-width, start_y);
799 let highlight_size = size(width * 2., end_y - start_y);
800 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
801 cx.paint_quad(quad(
802 highlight_bounds,
803 Corners::all(1. * line_height),
804 gpui::yellow(), // todo!("use the right color")
805 Edges::default(),
806 transparent_black(),
807 ));
808
809 continue;
810 }
811
812 DisplayDiffHunk::Unfolded {
813 display_row_range,
814 status,
815 } => (display_row_range, status),
816 };
817
818 let color = match status {
819 DiffHunkStatus::Added => cx.theme().status().created,
820 DiffHunkStatus::Modified => cx.theme().status().modified,
821
822 //TODO: This rendering is entirely a horrible hack
823 DiffHunkStatus::Removed => {
824 let row = display_row_range.start;
825
826 let offset = line_height / 2.;
827 let start_y = row as f32 * line_height - offset - scroll_top;
828 let end_y = start_y + line_height;
829
830 let width = 0.275 * line_height;
831 let highlight_origin = bounds.origin + point(-width, start_y);
832 let highlight_size = size(width * 2., end_y - start_y);
833 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
834 cx.paint_quad(quad(
835 highlight_bounds,
836 Corners::all(1. * line_height),
837 cx.theme().status().deleted,
838 Edges::default(),
839 transparent_black(),
840 ));
841
842 continue;
843 }
844 };
845
846 let start_row = display_row_range.start;
847 let end_row = display_row_range.end;
848
849 let start_y = start_row as f32 * line_height - scroll_top;
850 let end_y = end_row as f32 * line_height - scroll_top;
851
852 let width = 0.275 * line_height;
853 let highlight_origin = bounds.origin + point(-width, start_y);
854 let highlight_size = size(width * 2., end_y - start_y);
855 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
856 cx.paint_quad(quad(
857 highlight_bounds,
858 Corners::all(0.05 * line_height),
859 color, // todo!("use the right color")
860 Edges::default(),
861 transparent_black(),
862 ));
863 }
864 }
865
866 fn paint_text(
867 &mut self,
868 text_bounds: Bounds<Pixels>,
869 layout: &mut LayoutState,
870 cx: &mut WindowContext,
871 ) {
872 let scroll_position = layout.position_map.snapshot.scroll_position();
873 let start_row = layout.visible_display_row_range.start;
874 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
875 let line_end_overshoot = 0.15 * layout.position_map.line_height;
876 let whitespace_setting = self
877 .editor
878 .read(cx)
879 .buffer
880 .read(cx)
881 .settings_at(0, cx)
882 .show_whitespaces;
883
884 cx.with_content_mask(
885 Some(ContentMask {
886 bounds: text_bounds,
887 }),
888 |cx| {
889 if text_bounds.contains(&cx.mouse_position()) {
890 if self
891 .editor
892 .read(cx)
893 .link_go_to_definition_state
894 .definitions
895 .is_empty()
896 {
897 cx.set_cursor_style(CursorStyle::IBeam);
898 } else {
899 cx.set_cursor_style(CursorStyle::PointingHand);
900 }
901 }
902
903 let fold_corner_radius = 0.15 * layout.position_map.line_height;
904 cx.with_element_id(Some("folds"), |cx| {
905 let snapshot = &layout.position_map.snapshot;
906 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
907 let fold_range = fold.range.clone();
908 let display_range = fold.range.start.to_display_point(&snapshot)
909 ..fold.range.end.to_display_point(&snapshot);
910 debug_assert_eq!(display_range.start.row(), display_range.end.row());
911 let row = display_range.start.row();
912
913 let line_layout = &layout.position_map.line_layouts
914 [(row - layout.visible_display_row_range.start) as usize]
915 .line;
916 let start_x = content_origin.x
917 + line_layout.x_for_index(display_range.start.column() as usize)
918 - layout.position_map.scroll_position.x;
919 let start_y = content_origin.y
920 + row as f32 * layout.position_map.line_height
921 - layout.position_map.scroll_position.y;
922 let end_x = content_origin.x
923 + line_layout.x_for_index(display_range.end.column() as usize)
924 - layout.position_map.scroll_position.x;
925
926 let fold_bounds = Bounds {
927 origin: point(start_x, start_y),
928 size: size(end_x - start_x, layout.position_map.line_height),
929 };
930
931 let fold_background = cx.with_z_index(1, |cx| {
932 div()
933 .id(fold.id)
934 .size_full()
935 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
936 .on_click(cx.listener_for(
937 &self.editor,
938 move |editor: &mut Editor, _, cx| {
939 editor.unfold_ranges(
940 [fold_range.start..fold_range.end],
941 true,
942 false,
943 cx,
944 );
945 cx.stop_propagation();
946 },
947 ))
948 .draw_and_update_state(
949 fold_bounds.origin,
950 fold_bounds.size,
951 cx,
952 |fold_element_state, cx| {
953 if fold_element_state.is_active() {
954 cx.theme().colors().ghost_element_active
955 } else if fold_bounds.contains(&cx.mouse_position()) {
956 cx.theme().colors().ghost_element_hover
957 } else {
958 cx.theme().colors().ghost_element_background
959 }
960 },
961 )
962 });
963
964 self.paint_highlighted_range(
965 display_range.clone(),
966 fold_background,
967 fold_corner_radius,
968 fold_corner_radius * 2.,
969 layout,
970 content_origin,
971 text_bounds,
972 cx,
973 );
974 }
975 });
976
977 for (range, color) in &layout.highlighted_ranges {
978 self.paint_highlighted_range(
979 range.clone(),
980 *color,
981 Pixels::ZERO,
982 line_end_overshoot,
983 layout,
984 content_origin,
985 text_bounds,
986 cx,
987 );
988 }
989
990 let mut cursors = SmallVec::<[Cursor; 32]>::new();
991 let corner_radius = 0.15 * layout.position_map.line_height;
992 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
993
994 for (selection_style, selections) in &layout.selections {
995 for selection in selections {
996 self.paint_highlighted_range(
997 selection.range.clone(),
998 selection_style.selection,
999 corner_radius,
1000 corner_radius * 2.,
1001 layout,
1002 content_origin,
1003 text_bounds,
1004 cx,
1005 );
1006
1007 if selection.is_local && !selection.range.is_empty() {
1008 invisible_display_ranges.push(selection.range.clone());
1009 }
1010
1011 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1012 let cursor_position = selection.head;
1013 if layout
1014 .visible_display_row_range
1015 .contains(&cursor_position.row())
1016 {
1017 let cursor_row_layout = &layout.position_map.line_layouts
1018 [(cursor_position.row() - start_row) as usize]
1019 .line;
1020 let cursor_column = cursor_position.column() as usize;
1021
1022 let cursor_character_x =
1023 cursor_row_layout.x_for_index(cursor_column);
1024 let mut block_width = cursor_row_layout
1025 .x_for_index(cursor_column + 1)
1026 - cursor_character_x;
1027 if block_width == Pixels::ZERO {
1028 block_width = layout.position_map.em_width;
1029 }
1030 let block_text = if let CursorShape::Block = selection.cursor_shape
1031 {
1032 layout
1033 .position_map
1034 .snapshot
1035 .chars_at(cursor_position)
1036 .next()
1037 .and_then(|(character, _)| {
1038 // todo!() currently shape_line panics if text conatins newlines
1039 let text = if character == '\n' {
1040 SharedString::from(" ")
1041 } else {
1042 SharedString::from(character.to_string())
1043 };
1044 let len = text.len();
1045 cx.text_system()
1046 .shape_line(
1047 text,
1048 cursor_row_layout.font_size,
1049 &[TextRun {
1050 len,
1051 font: self.style.text.font(),
1052 color: self.style.background,
1053 background_color: None,
1054 underline: None,
1055 }],
1056 )
1057 .log_err()
1058 })
1059 } else {
1060 None
1061 };
1062
1063 let x = cursor_character_x - layout.position_map.scroll_position.x;
1064 let y = cursor_position.row() as f32
1065 * layout.position_map.line_height
1066 - layout.position_map.scroll_position.y;
1067 if selection.is_newest {
1068 self.editor.update(cx, |editor, _| {
1069 editor.pixel_position_of_newest_cursor = Some(point(
1070 text_bounds.origin.x + x + block_width / 2.,
1071 text_bounds.origin.y
1072 + y
1073 + layout.position_map.line_height / 2.,
1074 ))
1075 });
1076 }
1077 cursors.push(Cursor {
1078 color: selection_style.cursor,
1079 block_width,
1080 origin: point(x, y),
1081 line_height: layout.position_map.line_height,
1082 shape: selection.cursor_shape,
1083 block_text,
1084 });
1085 }
1086 }
1087 }
1088 }
1089
1090 for (ix, line_with_invisibles) in
1091 layout.position_map.line_layouts.iter().enumerate()
1092 {
1093 let row = start_row + ix as u32;
1094 line_with_invisibles.draw(
1095 layout,
1096 row,
1097 content_origin,
1098 whitespace_setting,
1099 &invisible_display_ranges,
1100 cx,
1101 )
1102 }
1103
1104 cx.with_z_index(0, |cx| {
1105 for cursor in cursors {
1106 cursor.paint(content_origin, cx);
1107 }
1108 });
1109 },
1110 )
1111 }
1112
1113 fn paint_overlays(
1114 &mut self,
1115 text_bounds: Bounds<Pixels>,
1116 layout: &mut LayoutState,
1117 cx: &mut WindowContext,
1118 ) {
1119 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1120 let start_row = layout.visible_display_row_range.start;
1121 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1122 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1123 let context_menu_size = context_menu.measure(available_space, cx);
1124
1125 let cursor_row_layout =
1126 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1127 let x = cursor_row_layout.x_for_index(position.column() as usize)
1128 - layout.position_map.scroll_position.x;
1129 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1130 - layout.position_map.scroll_position.y;
1131 let mut list_origin = content_origin + point(x, y);
1132 let list_width = context_menu_size.width;
1133 let list_height = context_menu_size.height;
1134
1135 // Snap the right edge of the list to the right edge of the window if
1136 // its horizontal bounds overflow.
1137 if list_origin.x + list_width > cx.viewport_size().width {
1138 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1139 }
1140
1141 if list_origin.y + list_height > text_bounds.lower_right().y {
1142 list_origin.y -= layout.position_map.line_height + list_height;
1143 }
1144
1145 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1146 }
1147
1148 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1149 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1150
1151 // This is safe because we check on layout whether the required row is available
1152 let hovered_row_layout =
1153 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1154
1155 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1156 // height. This is the size we will use to decide whether to render popovers above or below
1157 // the hovered line.
1158 let first_size = hover_popovers[0].measure(available_space, cx);
1159 let height_to_reserve =
1160 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1161
1162 // Compute Hovered Point
1163 let x = hovered_row_layout.x_for_index(position.column() as usize)
1164 - layout.position_map.scroll_position.x;
1165 let y = position.row() as f32 * layout.position_map.line_height
1166 - layout.position_map.scroll_position.y;
1167 let hovered_point = content_origin + point(x, y);
1168
1169 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1170 // There is enough space above. Render popovers above the hovered point
1171 let mut current_y = hovered_point.y;
1172 for mut hover_popover in hover_popovers {
1173 let size = hover_popover.measure(available_space, cx);
1174 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1175
1176 let x_out_of_bounds =
1177 text_bounds.upper_right().x - (popover_origin.x + size.width);
1178 if x_out_of_bounds < Pixels::ZERO {
1179 popover_origin.x = popover_origin.x + x_out_of_bounds;
1180 }
1181
1182 cx.break_content_mask(|cx| {
1183 hover_popover.draw(popover_origin, available_space, cx)
1184 });
1185
1186 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1187 }
1188 } else {
1189 // There is not enough space above. Render popovers below the hovered point
1190 let mut current_y = hovered_point.y + layout.position_map.line_height;
1191 for mut hover_popover in hover_popovers {
1192 let size = hover_popover.measure(available_space, cx);
1193 let mut popover_origin = point(hovered_point.x, current_y);
1194
1195 let x_out_of_bounds =
1196 text_bounds.upper_right().x - (popover_origin.x + size.width);
1197 if x_out_of_bounds < Pixels::ZERO {
1198 popover_origin.x = popover_origin.x + x_out_of_bounds;
1199 }
1200
1201 hover_popover.draw(popover_origin, available_space, cx);
1202
1203 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1204 }
1205 }
1206 }
1207
1208 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1209 let element = overlay()
1210 .position(mouse_context_menu.position)
1211 .child(mouse_context_menu.context_menu.clone())
1212 .anchor(AnchorCorner::TopLeft)
1213 .snap_to_window();
1214 element.into_any().draw(
1215 gpui::Point::default(),
1216 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1217 cx,
1218 );
1219 }
1220 }
1221
1222 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1223 bounds.upper_right().x - self.style.scrollbar_width
1224 }
1225
1226 fn paint_scrollbar(
1227 &mut self,
1228 bounds: Bounds<Pixels>,
1229 layout: &mut LayoutState,
1230 cx: &mut WindowContext,
1231 ) {
1232 if layout.mode != EditorMode::Full {
1233 return;
1234 }
1235
1236 let top = bounds.origin.y;
1237 let bottom = bounds.lower_left().y;
1238 let right = bounds.lower_right().x;
1239 let left = self.scrollbar_left(&bounds);
1240 let row_range = layout.scrollbar_row_range.clone();
1241 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1242
1243 let mut height = bounds.size.height;
1244 let mut first_row_y_offset = px(0.0);
1245
1246 // Impose a minimum height on the scrollbar thumb
1247 let row_height = height / max_row;
1248 let min_thumb_height = layout.position_map.line_height;
1249 let thumb_height = (row_range.end - row_range.start) * row_height;
1250 if thumb_height < min_thumb_height {
1251 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1252 height -= min_thumb_height - thumb_height;
1253 }
1254
1255 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1256
1257 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1258 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1259 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1260 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1261
1262 if layout.show_scrollbars {
1263 cx.paint_quad(quad(
1264 track_bounds,
1265 Corners::default(),
1266 cx.theme().colors().scrollbar_track_background,
1267 Edges {
1268 top: Pixels::ZERO,
1269 right: Pixels::ZERO,
1270 bottom: Pixels::ZERO,
1271 left: px(1.),
1272 },
1273 cx.theme().colors().scrollbar_track_border,
1274 ));
1275 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1276 if layout.is_singleton && scrollbar_settings.selections {
1277 let start_anchor = Anchor::min();
1278 let end_anchor = Anchor::max();
1279 let background_ranges = self
1280 .editor
1281 .read(cx)
1282 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1283 start_anchor..end_anchor,
1284 &layout.position_map.snapshot,
1285 50000,
1286 );
1287 for range in background_ranges {
1288 let start_y = y_for_row(range.start().row() as f32);
1289 let mut end_y = y_for_row(range.end().row() as f32);
1290 if end_y - start_y < px(1.) {
1291 end_y = start_y + px(1.);
1292 }
1293 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1294 cx.paint_quad(quad(
1295 bounds,
1296 Corners::default(),
1297 cx.theme().status().info,
1298 Edges {
1299 top: Pixels::ZERO,
1300 right: px(1.),
1301 bottom: Pixels::ZERO,
1302 left: px(1.),
1303 },
1304 cx.theme().colors().scrollbar_thumb_border,
1305 ));
1306 }
1307 }
1308
1309 if layout.is_singleton && scrollbar_settings.git_diff {
1310 for hunk in layout
1311 .position_map
1312 .snapshot
1313 .buffer_snapshot
1314 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1315 {
1316 let start_display = Point::new(hunk.buffer_range.start, 0)
1317 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1318 let end_display = Point::new(hunk.buffer_range.end, 0)
1319 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1320 let start_y = y_for_row(start_display.row() as f32);
1321 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1322 y_for_row((end_display.row() + 1) as f32)
1323 } else {
1324 y_for_row((end_display.row()) as f32)
1325 };
1326
1327 if end_y - start_y < px(1.) {
1328 end_y = start_y + px(1.);
1329 }
1330 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1331
1332 let color = match hunk.status() {
1333 DiffHunkStatus::Added => cx.theme().status().created,
1334 DiffHunkStatus::Modified => cx.theme().status().modified,
1335 DiffHunkStatus::Removed => cx.theme().status().deleted,
1336 };
1337 cx.paint_quad(quad(
1338 bounds,
1339 Corners::default(),
1340 color,
1341 Edges {
1342 top: Pixels::ZERO,
1343 right: px(1.),
1344 bottom: Pixels::ZERO,
1345 left: px(1.),
1346 },
1347 cx.theme().colors().scrollbar_thumb_border,
1348 ));
1349 }
1350 }
1351
1352 cx.paint_quad(quad(
1353 thumb_bounds,
1354 Corners::default(),
1355 cx.theme().colors().scrollbar_thumb_background,
1356 Edges {
1357 top: Pixels::ZERO,
1358 right: px(1.),
1359 bottom: Pixels::ZERO,
1360 left: px(1.),
1361 },
1362 cx.theme().colors().scrollbar_thumb_border,
1363 ));
1364 }
1365
1366 let mut mouse_position = cx.mouse_position();
1367 if track_bounds.contains(&mouse_position) {
1368 cx.set_cursor_style(CursorStyle::Arrow);
1369 }
1370
1371 cx.on_mouse_event({
1372 let editor = self.editor.clone();
1373 move |event: &MouseMoveEvent, phase, cx| {
1374 if phase == DispatchPhase::Capture {
1375 return;
1376 }
1377
1378 editor.update(cx, |editor, cx| {
1379 if event.pressed_button == Some(MouseButton::Left)
1380 && editor.scroll_manager.is_dragging_scrollbar()
1381 {
1382 let y = mouse_position.y;
1383 let new_y = event.position.y;
1384 if thumb_top < y && y < thumb_bottom {
1385 let mut position = editor.scroll_position(cx);
1386 position.y += (new_y - y) * (max_row as f32) / height;
1387 if position.y < 0.0 {
1388 position.y = 0.0;
1389 }
1390 editor.set_scroll_position(position, cx);
1391 }
1392
1393 mouse_position = event.position;
1394 cx.stop_propagation();
1395 } else {
1396 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1397 if track_bounds.contains(&event.position) {
1398 editor.scroll_manager.show_scrollbar(cx);
1399 }
1400 }
1401 })
1402 }
1403 });
1404
1405 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1406 cx.on_mouse_event({
1407 let editor = self.editor.clone();
1408 move |event: &MouseUpEvent, phase, cx| {
1409 if phase == DispatchPhase::Capture {
1410 return;
1411 }
1412
1413 editor.update(cx, |editor, cx| {
1414 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1415 cx.stop_propagation();
1416 });
1417 }
1418 });
1419 } else {
1420 cx.on_mouse_event({
1421 let editor = self.editor.clone();
1422 move |event: &MouseDownEvent, phase, cx| {
1423 if phase == DispatchPhase::Capture {
1424 return;
1425 }
1426
1427 editor.update(cx, |editor, cx| {
1428 if track_bounds.contains(&event.position) {
1429 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1430
1431 let y = event.position.y;
1432 if y < thumb_top || thumb_bottom < y {
1433 let center_row =
1434 ((y - top) * max_row as f32 / height).round() as u32;
1435 let top_row = center_row
1436 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1437 let mut position = editor.scroll_position(cx);
1438 position.y = top_row as f32;
1439 editor.set_scroll_position(position, cx);
1440 } else {
1441 editor.scroll_manager.show_scrollbar(cx);
1442 }
1443
1444 cx.stop_propagation();
1445 }
1446 });
1447 }
1448 });
1449 }
1450 }
1451
1452 #[allow(clippy::too_many_arguments)]
1453 fn paint_highlighted_range(
1454 &self,
1455 range: Range<DisplayPoint>,
1456 color: Hsla,
1457 corner_radius: Pixels,
1458 line_end_overshoot: Pixels,
1459 layout: &LayoutState,
1460 content_origin: gpui::Point<Pixels>,
1461 bounds: Bounds<Pixels>,
1462 cx: &mut WindowContext,
1463 ) {
1464 let start_row = layout.visible_display_row_range.start;
1465 let end_row = layout.visible_display_row_range.end;
1466 if range.start != range.end {
1467 let row_range = if range.end.column() == 0 {
1468 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1469 } else {
1470 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1471 };
1472
1473 let highlighted_range = HighlightedRange {
1474 color,
1475 line_height: layout.position_map.line_height,
1476 corner_radius,
1477 start_y: content_origin.y
1478 + row_range.start as f32 * layout.position_map.line_height
1479 - layout.position_map.scroll_position.y,
1480 lines: row_range
1481 .into_iter()
1482 .map(|row| {
1483 let line_layout =
1484 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1485 HighlightedRangeLine {
1486 start_x: if row == range.start.row() {
1487 content_origin.x
1488 + line_layout.x_for_index(range.start.column() as usize)
1489 - layout.position_map.scroll_position.x
1490 } else {
1491 content_origin.x - layout.position_map.scroll_position.x
1492 },
1493 end_x: if row == range.end.row() {
1494 content_origin.x
1495 + line_layout.x_for_index(range.end.column() as usize)
1496 - layout.position_map.scroll_position.x
1497 } else {
1498 content_origin.x + line_layout.width + line_end_overshoot
1499 - layout.position_map.scroll_position.x
1500 },
1501 }
1502 })
1503 .collect(),
1504 };
1505
1506 highlighted_range.paint(bounds, cx);
1507 }
1508 }
1509
1510 fn paint_blocks(
1511 &mut self,
1512 bounds: Bounds<Pixels>,
1513 layout: &mut LayoutState,
1514 cx: &mut WindowContext,
1515 ) {
1516 let scroll_position = layout.position_map.snapshot.scroll_position();
1517 let scroll_left = scroll_position.x * layout.position_map.em_width;
1518 let scroll_top = scroll_position.y * layout.position_map.line_height;
1519
1520 for mut block in layout.blocks.drain(..) {
1521 let mut origin = bounds.origin
1522 + point(
1523 Pixels::ZERO,
1524 block.row as f32 * layout.position_map.line_height - scroll_top,
1525 );
1526 if !matches!(block.style, BlockStyle::Sticky) {
1527 origin += point(-scroll_left, Pixels::ZERO);
1528 }
1529 block.element.draw(origin, block.available_space, cx);
1530 }
1531 }
1532
1533 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1534 let style = &self.style;
1535 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1536 let layout = cx
1537 .text_system()
1538 .shape_line(
1539 SharedString::from(" ".repeat(column)),
1540 font_size,
1541 &[TextRun {
1542 len: column,
1543 font: style.text.font(),
1544 color: Hsla::default(),
1545 background_color: None,
1546 underline: None,
1547 }],
1548 )
1549 .unwrap();
1550
1551 layout.width
1552 }
1553
1554 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1555 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1556 self.column_pixels(digit_count, cx)
1557 }
1558
1559 //Folds contained in a hunk are ignored apart from shrinking visual size
1560 //If a fold contains any hunks then that fold line is marked as modified
1561 fn layout_git_gutters(
1562 &self,
1563 display_rows: Range<u32>,
1564 snapshot: &EditorSnapshot,
1565 ) -> Vec<DisplayDiffHunk> {
1566 let buffer_snapshot = &snapshot.buffer_snapshot;
1567
1568 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1569 .to_point(snapshot)
1570 .row;
1571 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1572 .to_point(snapshot)
1573 .row;
1574
1575 buffer_snapshot
1576 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1577 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1578 .dedup()
1579 .collect()
1580 }
1581
1582 fn calculate_relative_line_numbers(
1583 &self,
1584 snapshot: &EditorSnapshot,
1585 rows: &Range<u32>,
1586 relative_to: Option<u32>,
1587 ) -> HashMap<u32, u32> {
1588 let mut relative_rows: HashMap<u32, u32> = Default::default();
1589 let Some(relative_to) = relative_to else {
1590 return relative_rows;
1591 };
1592
1593 let start = rows.start.min(relative_to);
1594 let end = rows.end.max(relative_to);
1595
1596 let buffer_rows = snapshot
1597 .buffer_rows(start)
1598 .take(1 + (end - start) as usize)
1599 .collect::<Vec<_>>();
1600
1601 let head_idx = relative_to - start;
1602 let mut delta = 1;
1603 let mut i = head_idx + 1;
1604 while i < buffer_rows.len() as u32 {
1605 if buffer_rows[i as usize].is_some() {
1606 if rows.contains(&(i + start)) {
1607 relative_rows.insert(i + start, delta);
1608 }
1609 delta += 1;
1610 }
1611 i += 1;
1612 }
1613 delta = 1;
1614 i = head_idx.min(buffer_rows.len() as u32 - 1);
1615 while i > 0 && buffer_rows[i as usize].is_none() {
1616 i -= 1;
1617 }
1618
1619 while i > 0 {
1620 i -= 1;
1621 if buffer_rows[i as usize].is_some() {
1622 if rows.contains(&(i + start)) {
1623 relative_rows.insert(i + start, delta);
1624 }
1625 delta += 1;
1626 }
1627 }
1628
1629 relative_rows
1630 }
1631
1632 fn shape_line_numbers(
1633 &self,
1634 rows: Range<u32>,
1635 active_rows: &BTreeMap<u32, bool>,
1636 newest_selection_head: DisplayPoint,
1637 is_singleton: bool,
1638 snapshot: &EditorSnapshot,
1639 cx: &ViewContext<Editor>,
1640 ) -> (
1641 Vec<Option<ShapedLine>>,
1642 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1643 ) {
1644 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1645 let include_line_numbers = snapshot.mode == EditorMode::Full;
1646 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1647 let mut fold_statuses = Vec::with_capacity(rows.len());
1648 let mut line_number = String::new();
1649 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1650 let relative_to = if is_relative {
1651 Some(newest_selection_head.row())
1652 } else {
1653 None
1654 };
1655
1656 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1657
1658 for (ix, row) in snapshot
1659 .buffer_rows(rows.start)
1660 .take((rows.end - rows.start) as usize)
1661 .enumerate()
1662 {
1663 let display_row = rows.start + ix as u32;
1664 let (active, color) = if active_rows.contains_key(&display_row) {
1665 (true, cx.theme().colors().editor_active_line_number)
1666 } else {
1667 (false, cx.theme().colors().editor_line_number)
1668 };
1669 if let Some(buffer_row) = row {
1670 if include_line_numbers {
1671 line_number.clear();
1672 let default_number = buffer_row + 1;
1673 let number = relative_rows
1674 .get(&(ix as u32 + rows.start))
1675 .unwrap_or(&default_number);
1676 write!(&mut line_number, "{}", number).unwrap();
1677 let run = TextRun {
1678 len: line_number.len(),
1679 font: self.style.text.font(),
1680 color,
1681 background_color: None,
1682 underline: None,
1683 };
1684 let shaped_line = cx
1685 .text_system()
1686 .shape_line(line_number.clone().into(), font_size, &[run])
1687 .unwrap();
1688 shaped_line_numbers.push(Some(shaped_line));
1689 fold_statuses.push(
1690 is_singleton
1691 .then(|| {
1692 snapshot
1693 .fold_for_line(buffer_row)
1694 .map(|fold_status| (fold_status, buffer_row, active))
1695 })
1696 .flatten(),
1697 )
1698 }
1699 } else {
1700 fold_statuses.push(None);
1701 shaped_line_numbers.push(None);
1702 }
1703 }
1704
1705 (shaped_line_numbers, fold_statuses)
1706 }
1707
1708 fn layout_lines(
1709 &self,
1710 rows: Range<u32>,
1711 line_number_layouts: &[Option<ShapedLine>],
1712 snapshot: &EditorSnapshot,
1713 cx: &ViewContext<Editor>,
1714 ) -> Vec<LineWithInvisibles> {
1715 if rows.start >= rows.end {
1716 return Vec::new();
1717 }
1718
1719 // When the editor is empty and unfocused, then show the placeholder.
1720 if snapshot.is_empty() {
1721 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1722 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1723 let placeholder_text = snapshot.placeholder_text();
1724 let placeholder_lines = placeholder_text
1725 .as_ref()
1726 .map_or("", AsRef::as_ref)
1727 .split('\n')
1728 .skip(rows.start as usize)
1729 .chain(iter::repeat(""))
1730 .take(rows.len());
1731 placeholder_lines
1732 .filter_map(move |line| {
1733 let run = TextRun {
1734 len: line.len(),
1735 font: self.style.text.font(),
1736 color: placeholder_color,
1737 background_color: None,
1738 underline: Default::default(),
1739 };
1740 cx.text_system()
1741 .shape_line(line.to_string().into(), font_size, &[run])
1742 .log_err()
1743 })
1744 .map(|line| LineWithInvisibles {
1745 line,
1746 invisibles: Vec::new(),
1747 })
1748 .collect()
1749 } else {
1750 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1751 LineWithInvisibles::from_chunks(
1752 chunks,
1753 &self.style.text,
1754 MAX_LINE_LEN,
1755 rows.len() as usize,
1756 line_number_layouts,
1757 snapshot.mode,
1758 cx,
1759 )
1760 }
1761 }
1762
1763 fn compute_layout(
1764 &mut self,
1765 mut bounds: Bounds<Pixels>,
1766 cx: &mut WindowContext,
1767 ) -> LayoutState {
1768 self.editor.update(cx, |editor, cx| {
1769 let snapshot = editor.snapshot(cx);
1770 let style = self.style.clone();
1771
1772 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1773 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1774 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1775 let em_width = cx
1776 .text_system()
1777 .typographic_bounds(font_id, font_size, 'm')
1778 .unwrap()
1779 .size
1780 .width;
1781 let em_advance = cx
1782 .text_system()
1783 .advance(font_id, font_size, 'm')
1784 .unwrap()
1785 .width;
1786
1787 let gutter_padding;
1788 let gutter_width;
1789 let gutter_margin;
1790 if snapshot.show_gutter {
1791 let descent = cx.text_system().descent(font_id, font_size);
1792
1793 let gutter_padding_factor = 3.5;
1794 gutter_padding = (em_width * gutter_padding_factor).round();
1795 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1796 gutter_margin = -descent;
1797 } else {
1798 gutter_padding = Pixels::ZERO;
1799 gutter_width = Pixels::ZERO;
1800 gutter_margin = Pixels::ZERO;
1801 };
1802
1803 editor.gutter_width = gutter_width;
1804
1805 let text_width = bounds.size.width - gutter_width;
1806 let overscroll = size(em_width, px(0.));
1807 let snapshot = {
1808 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1809
1810 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1811 let wrap_width = match editor.soft_wrap_mode(cx) {
1812 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1813 SoftWrap::EditorWidth => editor_width,
1814 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1815 };
1816
1817 if editor.set_wrap_width(Some(wrap_width), cx) {
1818 editor.snapshot(cx)
1819 } else {
1820 snapshot
1821 }
1822 };
1823
1824 let wrap_guides = editor
1825 .wrap_guides(cx)
1826 .iter()
1827 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1828 .collect::<SmallVec<[_; 2]>>();
1829
1830 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1831 let gutter_size = size(gutter_width, bounds.size.height);
1832 let text_size = size(text_width, bounds.size.height);
1833
1834 let autoscroll_horizontally =
1835 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1836 let mut snapshot = editor.snapshot(cx);
1837
1838 let scroll_position = snapshot.scroll_position();
1839 // The scroll position is a fractional point, the whole number of which represents
1840 // the top of the window in terms of display rows.
1841 let start_row = scroll_position.y as u32;
1842 let height_in_lines = f32::from(bounds.size.height / line_height);
1843 let max_row = snapshot.max_point().row();
1844
1845 // Add 1 to ensure selections bleed off screen
1846 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1847
1848 let start_anchor = if start_row == 0 {
1849 Anchor::min()
1850 } else {
1851 snapshot
1852 .buffer_snapshot
1853 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1854 };
1855 let end_anchor = if end_row > max_row {
1856 Anchor::max()
1857 } else {
1858 snapshot
1859 .buffer_snapshot
1860 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1861 };
1862
1863 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1864 let mut active_rows = BTreeMap::new();
1865 let is_singleton = editor.is_singleton(cx);
1866
1867 let highlighted_rows = editor.highlighted_rows();
1868 let highlighted_ranges = editor.background_highlights_in_range(
1869 start_anchor..end_anchor,
1870 &snapshot.display_snapshot,
1871 cx.theme().colors(),
1872 );
1873
1874 let mut newest_selection_head = None;
1875
1876 if editor.show_local_selections {
1877 let mut local_selections: Vec<Selection<Point>> = editor
1878 .selections
1879 .disjoint_in_range(start_anchor..end_anchor, cx);
1880 local_selections.extend(editor.selections.pending(cx));
1881 let mut layouts = Vec::new();
1882 let newest = editor.selections.newest(cx);
1883 for selection in local_selections.drain(..) {
1884 let is_empty = selection.start == selection.end;
1885 let is_newest = selection == newest;
1886
1887 let layout = SelectionLayout::new(
1888 selection,
1889 editor.selections.line_mode,
1890 editor.cursor_shape,
1891 &snapshot.display_snapshot,
1892 is_newest,
1893 true,
1894 );
1895 if is_newest {
1896 newest_selection_head = Some(layout.head);
1897 }
1898
1899 for row in cmp::max(layout.active_rows.start, start_row)
1900 ..=cmp::min(layout.active_rows.end, end_row)
1901 {
1902 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1903 *contains_non_empty_selection |= !is_empty;
1904 }
1905 layouts.push(layout);
1906 }
1907
1908 selections.push((style.local_player, layouts));
1909 }
1910
1911 if let Some(collaboration_hub) = &editor.collaboration_hub {
1912 // When following someone, render the local selections in their color.
1913 if let Some(leader_id) = editor.leader_peer_id {
1914 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1915 if let Some(participant_index) = collaboration_hub
1916 .user_participant_indices(cx)
1917 .get(&collaborator.user_id)
1918 {
1919 if let Some((local_selection_style, _)) = selections.first_mut() {
1920 *local_selection_style = cx
1921 .theme()
1922 .players()
1923 .color_for_participant(participant_index.0);
1924 }
1925 }
1926 }
1927 }
1928
1929 let mut remote_selections = HashMap::default();
1930 for selection in snapshot.remote_selections_in_range(
1931 &(start_anchor..end_anchor),
1932 collaboration_hub.as_ref(),
1933 cx,
1934 ) {
1935 let selection_style = if let Some(participant_index) = selection.participant_index {
1936 cx.theme()
1937 .players()
1938 .color_for_participant(participant_index.0)
1939 } else {
1940 cx.theme().players().absent()
1941 };
1942
1943 // Don't re-render the leader's selections, since the local selections
1944 // match theirs.
1945 if Some(selection.peer_id) == editor.leader_peer_id {
1946 continue;
1947 }
1948
1949 remote_selections
1950 .entry(selection.replica_id)
1951 .or_insert((selection_style, Vec::new()))
1952 .1
1953 .push(SelectionLayout::new(
1954 selection.selection,
1955 selection.line_mode,
1956 selection.cursor_shape,
1957 &snapshot.display_snapshot,
1958 false,
1959 false,
1960 ));
1961 }
1962
1963 selections.extend(remote_selections.into_values());
1964 }
1965
1966 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1967 let show_scrollbars = match scrollbar_settings.show {
1968 ShowScrollbar::Auto => {
1969 // Git
1970 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1971 ||
1972 // Selections
1973 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1974 // Scrollmanager
1975 || editor.scroll_manager.scrollbars_visible()
1976 }
1977 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1978 ShowScrollbar::Always => true,
1979 ShowScrollbar::Never => false,
1980 };
1981
1982 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1983 let newest = editor.selections.newest::<Point>(cx);
1984 SelectionLayout::new(
1985 newest,
1986 editor.selections.line_mode,
1987 editor.cursor_shape,
1988 &snapshot.display_snapshot,
1989 true,
1990 true,
1991 )
1992 .head
1993 });
1994
1995 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1996 start_row..end_row,
1997 &active_rows,
1998 head_for_relative,
1999 is_singleton,
2000 &snapshot,
2001 cx,
2002 );
2003
2004 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2005
2006 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2007
2008 let mut max_visible_line_width = Pixels::ZERO;
2009 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2010 for line_with_invisibles in &line_layouts {
2011 if line_with_invisibles.line.width > max_visible_line_width {
2012 max_visible_line_width = line_with_invisibles.line.width;
2013 }
2014 }
2015
2016 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2017 .unwrap()
2018 .width;
2019 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2020
2021 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2022 self.layout_blocks(
2023 start_row..end_row,
2024 &snapshot,
2025 bounds.size.width,
2026 scroll_width,
2027 gutter_padding,
2028 gutter_width,
2029 em_width,
2030 gutter_width + gutter_margin,
2031 line_height,
2032 &style,
2033 &line_layouts,
2034 editor,
2035 cx,
2036 )
2037 });
2038
2039 let scroll_max = point(
2040 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2041 max_row as f32,
2042 );
2043
2044 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2045
2046 let autoscrolled = if autoscroll_horizontally {
2047 editor.autoscroll_horizontally(
2048 start_row,
2049 text_size.width,
2050 scroll_width,
2051 em_width,
2052 &line_layouts,
2053 cx,
2054 )
2055 } else {
2056 false
2057 };
2058
2059 if clamped || autoscrolled {
2060 snapshot = editor.snapshot(cx);
2061 }
2062
2063 let mut context_menu = None;
2064 let mut code_actions_indicator = None;
2065 if let Some(newest_selection_head) = newest_selection_head {
2066 if (start_row..end_row).contains(&newest_selection_head.row()) {
2067 if editor.context_menu_visible() {
2068 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2069 context_menu =
2070 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2071 }
2072
2073 let active = matches!(
2074 editor.context_menu.read().as_ref(),
2075 Some(crate::ContextMenu::CodeActions(_))
2076 );
2077
2078 code_actions_indicator = editor
2079 .render_code_actions_indicator(&style, active, cx)
2080 .map(|element| CodeActionsIndicator {
2081 row: newest_selection_head.row(),
2082 button: element,
2083 });
2084 }
2085 }
2086
2087 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2088 let max_size = size(
2089 (120. * em_width) // Default size
2090 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2091 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2092 (16. * line_height) // Default size
2093 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2094 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2095 );
2096
2097 let mut hover = editor.hover_state.render(
2098 &snapshot,
2099 &style,
2100 visible_rows,
2101 max_size,
2102 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2103 cx,
2104 );
2105
2106 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2107 editor.render_fold_indicators(
2108 fold_statuses,
2109 &style,
2110 editor.gutter_hovered,
2111 line_height,
2112 gutter_margin,
2113 cx,
2114 )
2115 });
2116
2117 let invisible_symbol_font_size = font_size / 2.;
2118 let tab_invisible = cx
2119 .text_system()
2120 .shape_line(
2121 "→".into(),
2122 invisible_symbol_font_size,
2123 &[TextRun {
2124 len: "→".len(),
2125 font: self.style.text.font(),
2126 color: cx.theme().colors().editor_invisible,
2127 background_color: None,
2128 underline: None,
2129 }],
2130 )
2131 .unwrap();
2132 let space_invisible = cx
2133 .text_system()
2134 .shape_line(
2135 "•".into(),
2136 invisible_symbol_font_size,
2137 &[TextRun {
2138 len: "•".len(),
2139 font: self.style.text.font(),
2140 color: cx.theme().colors().editor_invisible,
2141 background_color: None,
2142 underline: None,
2143 }],
2144 )
2145 .unwrap();
2146
2147 LayoutState {
2148 mode: snapshot.mode,
2149 position_map: Arc::new(PositionMap {
2150 size: bounds.size,
2151 scroll_position: point(
2152 scroll_position.x * em_width,
2153 scroll_position.y * line_height,
2154 ),
2155 scroll_max,
2156 line_layouts,
2157 line_height,
2158 em_width,
2159 em_advance,
2160 snapshot,
2161 }),
2162 visible_anchor_range: start_anchor..end_anchor,
2163 visible_display_row_range: start_row..end_row,
2164 wrap_guides,
2165 gutter_size,
2166 gutter_padding,
2167 text_size,
2168 scrollbar_row_range,
2169 show_scrollbars,
2170 is_singleton,
2171 max_row,
2172 gutter_margin,
2173 active_rows,
2174 highlighted_rows,
2175 highlighted_ranges,
2176 line_numbers,
2177 display_hunks,
2178 blocks,
2179 selections,
2180 context_menu,
2181 code_actions_indicator,
2182 fold_indicators,
2183 tab_invisible,
2184 space_invisible,
2185 hover_popovers: hover,
2186 }
2187 })
2188 }
2189
2190 #[allow(clippy::too_many_arguments)]
2191 fn layout_blocks(
2192 &self,
2193 rows: Range<u32>,
2194 snapshot: &EditorSnapshot,
2195 editor_width: Pixels,
2196 scroll_width: Pixels,
2197 gutter_padding: Pixels,
2198 gutter_width: Pixels,
2199 em_width: Pixels,
2200 text_x: Pixels,
2201 line_height: Pixels,
2202 style: &EditorStyle,
2203 line_layouts: &[LineWithInvisibles],
2204 editor: &mut Editor,
2205 cx: &mut ViewContext<Editor>,
2206 ) -> (Pixels, Vec<BlockLayout>) {
2207 let mut block_id = 0;
2208 let scroll_x = snapshot.scroll_anchor.offset.x;
2209 let (fixed_blocks, non_fixed_blocks) = snapshot
2210 .blocks_in_range(rows.clone())
2211 .partition::<Vec<_>, _>(|(_, block)| match block {
2212 TransformBlock::ExcerptHeader { .. } => false,
2213 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2214 });
2215
2216 let mut render_block = |block: &TransformBlock,
2217 available_space: Size<AvailableSpace>,
2218 block_id: usize,
2219 editor: &mut Editor,
2220 cx: &mut ViewContext<Editor>| {
2221 let mut element = match block {
2222 TransformBlock::Custom(block) => {
2223 let align_to = block
2224 .position()
2225 .to_point(&snapshot.buffer_snapshot)
2226 .to_display_point(snapshot);
2227 let anchor_x = text_x
2228 + if rows.contains(&align_to.row()) {
2229 line_layouts[(align_to.row() - rows.start) as usize]
2230 .line
2231 .x_for_index(align_to.column() as usize)
2232 } else {
2233 layout_line(align_to.row(), snapshot, style, cx)
2234 .unwrap()
2235 .x_for_index(align_to.column() as usize)
2236 };
2237
2238 block.render(&mut BlockContext {
2239 view_context: cx,
2240 anchor_x,
2241 gutter_padding,
2242 line_height,
2243 gutter_width,
2244 em_width,
2245 block_id,
2246 editor_style: &self.style,
2247 })
2248 }
2249
2250 TransformBlock::ExcerptHeader {
2251 buffer,
2252 range,
2253 starts_new_buffer,
2254 ..
2255 } => {
2256 let include_root = editor
2257 .project
2258 .as_ref()
2259 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2260 .unwrap_or_default();
2261
2262 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2263 let jump_path = ProjectPath {
2264 worktree_id: file.worktree_id(cx),
2265 path: file.path.clone(),
2266 };
2267 let jump_anchor = range
2268 .primary
2269 .as_ref()
2270 .map_or(range.context.start, |primary| primary.start);
2271 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2272
2273 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2274 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2275 });
2276
2277 jump_handler
2278 });
2279
2280 let element = if *starts_new_buffer {
2281 let path = buffer.resolve_file_path(cx, include_root);
2282 let mut filename = None;
2283 let mut parent_path = None;
2284 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2285 if let Some(path) = path {
2286 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2287 parent_path = path
2288 .parent()
2289 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2290 }
2291
2292 let is_open = true;
2293
2294 div().id("path header container").size_full().p_1p5().child(
2295 h_stack()
2296 .id("path header block")
2297 .py_1p5()
2298 .pl_3()
2299 .pr_2()
2300 .rounded_lg()
2301 .shadow_md()
2302 .border()
2303 .border_color(cx.theme().colors().border)
2304 .bg(cx.theme().colors().editor_subheader_background)
2305 .justify_between()
2306 .cursor_pointer()
2307 .hover(|style| style.bg(cx.theme().colors().element_hover))
2308 .child(
2309 h_stack().gap_3().child(
2310 h_stack()
2311 .gap_2()
2312 .child(Label::new(
2313 filename
2314 .map(SharedString::from)
2315 .unwrap_or_else(|| "untitled".into()),
2316 ))
2317 .when_some(parent_path, |then, path| {
2318 then.child(Label::new(path).color(Color::Muted))
2319 }),
2320 ),
2321 )
2322 .children(jump_handler.map(|jump_handler| {
2323 IconButton::new(block_id, Icon::ArrowUpRight)
2324 .style(ButtonStyle::Subtle)
2325 .on_click(jump_handler)
2326 .tooltip(|cx| {
2327 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2328 })
2329 })), // .p_x(gutter_padding)
2330 )
2331 } else {
2332 let text_style = style.text.clone();
2333 h_stack()
2334 .id("collapsed context")
2335 .size_full()
2336 .gap(gutter_padding)
2337 .child(
2338 h_stack()
2339 .justify_end()
2340 .flex_none()
2341 .w(gutter_width - gutter_padding)
2342 .h_full()
2343 .text_buffer(cx)
2344 .text_color(cx.theme().colors().editor_line_number)
2345 .child("..."),
2346 )
2347 .map(|this| {
2348 if let Some(jump_handler) = jump_handler {
2349 this.child(
2350 ButtonLike::new("jump to collapsed context")
2351 .style(ButtonStyle::Transparent)
2352 .full_width()
2353 .on_click(jump_handler)
2354 .tooltip(|cx| {
2355 Tooltip::for_action(
2356 "Jump to Buffer",
2357 &OpenExcerpts,
2358 cx,
2359 )
2360 })
2361 .child(
2362 div()
2363 .h_px()
2364 .w_full()
2365 .bg(cx.theme().colors().border_variant)
2366 .group_hover("", |style| {
2367 style.bg(cx.theme().colors().border)
2368 }),
2369 ),
2370 )
2371 } else {
2372 this.child(div().size_full().bg(gpui::green()))
2373 }
2374 })
2375 // .child("⋯")
2376 // .children(jump_icon) // .p_x(gutter_padding)
2377 };
2378 element.into_any()
2379 }
2380 };
2381
2382 let size = element.measure(available_space, cx);
2383 (element, size)
2384 };
2385
2386 let mut fixed_block_max_width = Pixels::ZERO;
2387 let mut blocks = Vec::new();
2388 for (row, block) in fixed_blocks {
2389 let available_space = size(
2390 AvailableSpace::MinContent,
2391 AvailableSpace::Definite(block.height() as f32 * line_height),
2392 );
2393 let (element, element_size) =
2394 render_block(block, available_space, block_id, editor, cx);
2395 block_id += 1;
2396 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2397 blocks.push(BlockLayout {
2398 row,
2399 element,
2400 available_space,
2401 style: BlockStyle::Fixed,
2402 });
2403 }
2404 for (row, block) in non_fixed_blocks {
2405 let style = match block {
2406 TransformBlock::Custom(block) => block.style(),
2407 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2408 };
2409 let width = match style {
2410 BlockStyle::Sticky => editor_width,
2411 BlockStyle::Flex => editor_width
2412 .max(fixed_block_max_width)
2413 .max(gutter_width + scroll_width),
2414 BlockStyle::Fixed => unreachable!(),
2415 };
2416 let available_space = size(
2417 AvailableSpace::Definite(width),
2418 AvailableSpace::Definite(block.height() as f32 * line_height),
2419 );
2420 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2421 block_id += 1;
2422 blocks.push(BlockLayout {
2423 row,
2424 element,
2425 available_space,
2426 style,
2427 });
2428 }
2429 (
2430 scroll_width.max(fixed_block_max_width - gutter_width),
2431 blocks,
2432 )
2433 }
2434
2435 fn paint_mouse_listeners(
2436 &mut self,
2437 bounds: Bounds<Pixels>,
2438 gutter_bounds: Bounds<Pixels>,
2439 text_bounds: Bounds<Pixels>,
2440 layout: &LayoutState,
2441 cx: &mut WindowContext,
2442 ) {
2443 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2444 let interactive_bounds = InteractiveBounds {
2445 bounds: bounds.intersect(&cx.content_mask().bounds),
2446 stacking_order: cx.stacking_order().clone(),
2447 };
2448
2449 cx.on_mouse_event({
2450 let position_map = layout.position_map.clone();
2451 let editor = self.editor.clone();
2452 let interactive_bounds = interactive_bounds.clone();
2453
2454 move |event: &ScrollWheelEvent, phase, cx| {
2455 if phase == DispatchPhase::Bubble
2456 && interactive_bounds.visibly_contains(&event.position, cx)
2457 {
2458 editor.update(cx, |editor, cx| {
2459 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2460 });
2461 }
2462 }
2463 });
2464
2465 cx.on_mouse_event({
2466 let position_map = layout.position_map.clone();
2467 let editor = self.editor.clone();
2468 let stacking_order = cx.stacking_order().clone();
2469 let interactive_bounds = interactive_bounds.clone();
2470
2471 move |event: &MouseDownEvent, phase, cx| {
2472 if phase == DispatchPhase::Bubble
2473 && interactive_bounds.visibly_contains(&event.position, cx)
2474 {
2475 match event.button {
2476 MouseButton::Left => editor.update(cx, |editor, cx| {
2477 Self::mouse_left_down(
2478 editor,
2479 event,
2480 &position_map,
2481 text_bounds,
2482 gutter_bounds,
2483 &stacking_order,
2484 cx,
2485 );
2486 }),
2487 MouseButton::Right => editor.update(cx, |editor, cx| {
2488 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2489 }),
2490 _ => {}
2491 };
2492 }
2493 }
2494 });
2495
2496 cx.on_mouse_event({
2497 let position_map = layout.position_map.clone();
2498 let editor = self.editor.clone();
2499 let stacking_order = cx.stacking_order().clone();
2500 let interactive_bounds = interactive_bounds.clone();
2501
2502 move |event: &MouseUpEvent, phase, cx| {
2503 if phase == DispatchPhase::Bubble
2504 && interactive_bounds.visibly_contains(&event.position, cx)
2505 {
2506 editor.update(cx, |editor, cx| {
2507 Self::mouse_up(
2508 editor,
2509 event,
2510 &position_map,
2511 text_bounds,
2512 &stacking_order,
2513 cx,
2514 )
2515 });
2516 }
2517 }
2518 });
2519 cx.on_mouse_event({
2520 let position_map = layout.position_map.clone();
2521 let editor = self.editor.clone();
2522 let stacking_order = cx.stacking_order().clone();
2523
2524 move |event: &MouseMoveEvent, phase, cx| {
2525 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2526
2527 if phase == DispatchPhase::Bubble {
2528 editor.update(cx, |editor, cx| {
2529 if event.pressed_button == Some(MouseButton::Left) {
2530 Self::mouse_dragged(
2531 editor,
2532 event,
2533 &position_map,
2534 text_bounds,
2535 gutter_bounds,
2536 &stacking_order,
2537 cx,
2538 )
2539 }
2540
2541 if interactive_bounds.visibly_contains(&event.position, cx) {
2542 Self::mouse_moved(
2543 editor,
2544 event,
2545 &position_map,
2546 text_bounds,
2547 gutter_bounds,
2548 &stacking_order,
2549 cx,
2550 )
2551 }
2552 });
2553 }
2554 }
2555 });
2556 }
2557}
2558
2559#[derive(Debug)]
2560pub struct LineWithInvisibles {
2561 pub line: ShapedLine,
2562 invisibles: Vec<Invisible>,
2563}
2564
2565impl LineWithInvisibles {
2566 fn from_chunks<'a>(
2567 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2568 text_style: &TextStyle,
2569 max_line_len: usize,
2570 max_line_count: usize,
2571 line_number_layouts: &[Option<ShapedLine>],
2572 editor_mode: EditorMode,
2573 cx: &WindowContext,
2574 ) -> Vec<Self> {
2575 let mut layouts = Vec::with_capacity(max_line_count);
2576 let mut line = String::new();
2577 let mut invisibles = Vec::new();
2578 let mut styles = Vec::new();
2579 let mut non_whitespace_added = false;
2580 let mut row = 0;
2581 let mut line_exceeded_max_len = false;
2582 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2583
2584 for highlighted_chunk in chunks.chain([HighlightedChunk {
2585 chunk: "\n",
2586 style: None,
2587 is_tab: false,
2588 }]) {
2589 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2590 if ix > 0 {
2591 let shaped_line = cx
2592 .text_system()
2593 .shape_line(line.clone().into(), font_size, &styles)
2594 .unwrap();
2595 layouts.push(Self {
2596 line: shaped_line,
2597 invisibles: invisibles.drain(..).collect(),
2598 });
2599
2600 line.clear();
2601 styles.clear();
2602 row += 1;
2603 line_exceeded_max_len = false;
2604 non_whitespace_added = false;
2605 if row == max_line_count {
2606 return layouts;
2607 }
2608 }
2609
2610 if !line_chunk.is_empty() && !line_exceeded_max_len {
2611 let text_style = if let Some(style) = highlighted_chunk.style {
2612 Cow::Owned(text_style.clone().highlight(style))
2613 } else {
2614 Cow::Borrowed(text_style)
2615 };
2616
2617 if line.len() + line_chunk.len() > max_line_len {
2618 let mut chunk_len = max_line_len - line.len();
2619 while !line_chunk.is_char_boundary(chunk_len) {
2620 chunk_len -= 1;
2621 }
2622 line_chunk = &line_chunk[..chunk_len];
2623 line_exceeded_max_len = true;
2624 }
2625
2626 styles.push(TextRun {
2627 len: line_chunk.len(),
2628 font: text_style.font(),
2629 color: text_style.color,
2630 background_color: text_style.background_color,
2631 underline: text_style.underline,
2632 });
2633
2634 if editor_mode == EditorMode::Full {
2635 // Line wrap pads its contents with fake whitespaces,
2636 // avoid printing them
2637 let inside_wrapped_string = line_number_layouts
2638 .get(row)
2639 .and_then(|layout| layout.as_ref())
2640 .is_none();
2641 if highlighted_chunk.is_tab {
2642 if non_whitespace_added || !inside_wrapped_string {
2643 invisibles.push(Invisible::Tab {
2644 line_start_offset: line.len(),
2645 });
2646 }
2647 } else {
2648 invisibles.extend(
2649 line_chunk
2650 .chars()
2651 .enumerate()
2652 .filter(|(_, line_char)| {
2653 let is_whitespace = line_char.is_whitespace();
2654 non_whitespace_added |= !is_whitespace;
2655 is_whitespace
2656 && (non_whitespace_added || !inside_wrapped_string)
2657 })
2658 .map(|(whitespace_index, _)| Invisible::Whitespace {
2659 line_offset: line.len() + whitespace_index,
2660 }),
2661 )
2662 }
2663 }
2664
2665 line.push_str(line_chunk);
2666 }
2667 }
2668 }
2669
2670 layouts
2671 }
2672
2673 fn draw(
2674 &self,
2675 layout: &LayoutState,
2676 row: u32,
2677 content_origin: gpui::Point<Pixels>,
2678 whitespace_setting: ShowWhitespaceSetting,
2679 selection_ranges: &[Range<DisplayPoint>],
2680 cx: &mut WindowContext,
2681 ) {
2682 let line_height = layout.position_map.line_height;
2683 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2684
2685 self.line.paint(
2686 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2687 line_height,
2688 cx,
2689 );
2690
2691 self.draw_invisibles(
2692 &selection_ranges,
2693 layout,
2694 content_origin,
2695 line_y,
2696 row,
2697 line_height,
2698 whitespace_setting,
2699 cx,
2700 );
2701 }
2702
2703 fn draw_invisibles(
2704 &self,
2705 selection_ranges: &[Range<DisplayPoint>],
2706 layout: &LayoutState,
2707 content_origin: gpui::Point<Pixels>,
2708 line_y: Pixels,
2709 row: u32,
2710 line_height: Pixels,
2711 whitespace_setting: ShowWhitespaceSetting,
2712 cx: &mut WindowContext,
2713 ) {
2714 let allowed_invisibles_regions = match whitespace_setting {
2715 ShowWhitespaceSetting::None => return,
2716 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2717 ShowWhitespaceSetting::All => None,
2718 };
2719
2720 for invisible in &self.invisibles {
2721 let (&token_offset, invisible_symbol) = match invisible {
2722 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2723 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2724 };
2725
2726 let x_offset = self.line.x_for_index(token_offset);
2727 let invisible_offset =
2728 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2729 let origin = content_origin
2730 + gpui::point(
2731 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2732 line_y,
2733 );
2734
2735 if let Some(allowed_regions) = allowed_invisibles_regions {
2736 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2737 if !allowed_regions
2738 .iter()
2739 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2740 {
2741 continue;
2742 }
2743 }
2744 invisible_symbol.paint(origin, line_height, cx);
2745 }
2746 }
2747}
2748
2749#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2750enum Invisible {
2751 Tab { line_start_offset: usize },
2752 Whitespace { line_offset: usize },
2753}
2754
2755impl Element for EditorElement {
2756 type State = ();
2757
2758 fn layout(
2759 &mut self,
2760 element_state: Option<Self::State>,
2761 cx: &mut gpui::WindowContext,
2762 ) -> (gpui::LayoutId, Self::State) {
2763 self.editor.update(cx, |editor, cx| {
2764 editor.set_style(self.style.clone(), cx);
2765
2766 let layout_id = match editor.mode {
2767 EditorMode::SingleLine => {
2768 let rem_size = cx.rem_size();
2769 let mut style = Style::default();
2770 style.size.width = relative(1.).into();
2771 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2772 cx.request_layout(&style, None)
2773 }
2774 EditorMode::AutoHeight { max_lines } => {
2775 let editor_handle = cx.view().clone();
2776 let max_line_number_width =
2777 self.max_line_number_width(&editor.snapshot(cx), cx);
2778 cx.request_measured_layout(
2779 Style::default(),
2780 move |known_dimensions, available_space, cx| {
2781 editor_handle
2782 .update(cx, |editor, cx| {
2783 compute_auto_height_layout(
2784 editor,
2785 max_lines,
2786 max_line_number_width,
2787 known_dimensions,
2788 cx,
2789 )
2790 })
2791 .unwrap_or_default()
2792 },
2793 )
2794 }
2795 EditorMode::Full => {
2796 let mut style = Style::default();
2797 style.size.width = relative(1.).into();
2798 style.size.height = relative(1.).into();
2799 cx.request_layout(&style, None)
2800 }
2801 };
2802
2803 (layout_id, ())
2804 })
2805 }
2806
2807 fn paint(
2808 &mut self,
2809 bounds: Bounds<gpui::Pixels>,
2810 element_state: &mut Self::State,
2811 cx: &mut gpui::WindowContext,
2812 ) {
2813 let editor = self.editor.clone();
2814
2815 let mut layout = self.compute_layout(bounds, cx);
2816 let gutter_bounds = Bounds {
2817 origin: bounds.origin,
2818 size: layout.gutter_size,
2819 };
2820 let text_bounds = Bounds {
2821 origin: gutter_bounds.upper_right(),
2822 size: layout.text_size,
2823 };
2824
2825 let focus_handle = editor.focus_handle(cx);
2826 let key_context = self.editor.read(cx).key_context(cx);
2827 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2828 self.register_actions(cx);
2829 self.register_key_listeners(cx);
2830
2831 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2832 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2833 cx.handle_input(&focus_handle, input_handler);
2834
2835 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2836 if layout.gutter_size.width > Pixels::ZERO {
2837 self.paint_gutter(gutter_bounds, &mut layout, cx);
2838 }
2839 self.paint_text(text_bounds, &mut layout, cx);
2840
2841 cx.with_z_index(0, |cx| {
2842 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2843
2844 if !layout.blocks.is_empty() {
2845 cx.with_element_id(Some("editor_blocks"), |cx| {
2846 self.paint_blocks(bounds, &mut layout, cx);
2847 });
2848 }
2849 });
2850
2851 cx.with_z_index(1, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2852
2853 cx.with_z_index(2, |cx| {
2854 self.paint_overlays(text_bounds, &mut layout, cx);
2855 });
2856 });
2857 })
2858 }
2859}
2860
2861impl IntoElement for EditorElement {
2862 type Element = Self;
2863
2864 fn element_id(&self) -> Option<gpui::ElementId> {
2865 self.editor.element_id()
2866 }
2867
2868 fn into_element(self) -> Self::Element {
2869 self
2870 }
2871}
2872
2873type BufferRow = u32;
2874
2875pub struct LayoutState {
2876 position_map: Arc<PositionMap>,
2877 gutter_size: Size<Pixels>,
2878 gutter_padding: Pixels,
2879 gutter_margin: Pixels,
2880 text_size: gpui::Size<Pixels>,
2881 mode: EditorMode,
2882 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2883 visible_anchor_range: Range<Anchor>,
2884 visible_display_row_range: Range<u32>,
2885 active_rows: BTreeMap<u32, bool>,
2886 highlighted_rows: Option<Range<u32>>,
2887 line_numbers: Vec<Option<ShapedLine>>,
2888 display_hunks: Vec<DisplayDiffHunk>,
2889 blocks: Vec<BlockLayout>,
2890 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2891 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2892 scrollbar_row_range: Range<f32>,
2893 show_scrollbars: bool,
2894 is_singleton: bool,
2895 max_row: u32,
2896 context_menu: Option<(DisplayPoint, AnyElement)>,
2897 code_actions_indicator: Option<CodeActionsIndicator>,
2898 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2899 fold_indicators: Vec<Option<IconButton>>,
2900 tab_invisible: ShapedLine,
2901 space_invisible: ShapedLine,
2902}
2903
2904struct CodeActionsIndicator {
2905 row: u32,
2906 button: IconButton,
2907}
2908
2909struct PositionMap {
2910 size: Size<Pixels>,
2911 line_height: Pixels,
2912 scroll_position: gpui::Point<Pixels>,
2913 scroll_max: gpui::Point<f32>,
2914 em_width: Pixels,
2915 em_advance: Pixels,
2916 line_layouts: Vec<LineWithInvisibles>,
2917 snapshot: EditorSnapshot,
2918}
2919
2920#[derive(Debug, Copy, Clone)]
2921pub struct PointForPosition {
2922 pub previous_valid: DisplayPoint,
2923 pub next_valid: DisplayPoint,
2924 pub exact_unclipped: DisplayPoint,
2925 pub column_overshoot_after_line_end: u32,
2926}
2927
2928impl PointForPosition {
2929 #[cfg(test)]
2930 pub fn valid(valid: DisplayPoint) -> Self {
2931 Self {
2932 previous_valid: valid,
2933 next_valid: valid,
2934 exact_unclipped: valid,
2935 column_overshoot_after_line_end: 0,
2936 }
2937 }
2938
2939 pub fn as_valid(&self) -> Option<DisplayPoint> {
2940 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2941 Some(self.previous_valid)
2942 } else {
2943 None
2944 }
2945 }
2946}
2947
2948impl PositionMap {
2949 fn point_for_position(
2950 &self,
2951 text_bounds: Bounds<Pixels>,
2952 position: gpui::Point<Pixels>,
2953 ) -> PointForPosition {
2954 let scroll_position = self.snapshot.scroll_position();
2955 let position = position - text_bounds.origin;
2956 let y = position.y.max(px(0.)).min(self.size.height);
2957 let x = position.x + (scroll_position.x * self.em_width);
2958 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2959
2960 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2961 .line_layouts
2962 .get(row as usize - scroll_position.y as usize)
2963 .map(|&LineWithInvisibles { ref line, .. }| line)
2964 {
2965 if let Some(ix) = line.index_for_x(x) {
2966 (ix as u32, px(0.))
2967 } else {
2968 (line.len as u32, px(0.).max(x - line.width))
2969 }
2970 } else {
2971 (0, x)
2972 };
2973
2974 let mut exact_unclipped = DisplayPoint::new(row, column);
2975 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2976 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2977
2978 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2979 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2980 PointForPosition {
2981 previous_valid,
2982 next_valid,
2983 exact_unclipped,
2984 column_overshoot_after_line_end,
2985 }
2986 }
2987}
2988
2989struct BlockLayout {
2990 row: u32,
2991 element: AnyElement,
2992 available_space: Size<AvailableSpace>,
2993 style: BlockStyle,
2994}
2995
2996fn layout_line(
2997 row: u32,
2998 snapshot: &EditorSnapshot,
2999 style: &EditorStyle,
3000 cx: &WindowContext,
3001) -> Result<ShapedLine> {
3002 let mut line = snapshot.line(row);
3003
3004 if line.len() > MAX_LINE_LEN {
3005 let mut len = MAX_LINE_LEN;
3006 while !line.is_char_boundary(len) {
3007 len -= 1;
3008 }
3009
3010 line.truncate(len);
3011 }
3012
3013 cx.text_system().shape_line(
3014 line.into(),
3015 style.text.font_size.to_pixels(cx.rem_size()),
3016 &[TextRun {
3017 len: snapshot.line_len(row) as usize,
3018 font: style.text.font(),
3019 color: Hsla::default(),
3020 background_color: None,
3021 underline: None,
3022 }],
3023 )
3024}
3025
3026#[derive(Debug)]
3027pub struct Cursor {
3028 origin: gpui::Point<Pixels>,
3029 block_width: Pixels,
3030 line_height: Pixels,
3031 color: Hsla,
3032 shape: CursorShape,
3033 block_text: Option<ShapedLine>,
3034}
3035
3036impl Cursor {
3037 pub fn new(
3038 origin: gpui::Point<Pixels>,
3039 block_width: Pixels,
3040 line_height: Pixels,
3041 color: Hsla,
3042 shape: CursorShape,
3043 block_text: Option<ShapedLine>,
3044 ) -> Cursor {
3045 Cursor {
3046 origin,
3047 block_width,
3048 line_height,
3049 color,
3050 shape,
3051 block_text,
3052 }
3053 }
3054
3055 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3056 Bounds {
3057 origin: self.origin + origin,
3058 size: size(self.block_width, self.line_height),
3059 }
3060 }
3061
3062 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3063 let bounds = match self.shape {
3064 CursorShape::Bar => Bounds {
3065 origin: self.origin + origin,
3066 size: size(px(2.0), self.line_height),
3067 },
3068 CursorShape::Block | CursorShape::Hollow => Bounds {
3069 origin: self.origin + origin,
3070 size: size(self.block_width, self.line_height),
3071 },
3072 CursorShape::Underscore => Bounds {
3073 origin: self.origin
3074 + origin
3075 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3076 size: size(self.block_width, px(2.0)),
3077 },
3078 };
3079
3080 //Draw background or border quad
3081 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3082 outline(bounds, self.color)
3083 } else {
3084 fill(bounds, self.color)
3085 };
3086
3087 cx.paint_quad(cursor);
3088
3089 if let Some(block_text) = &self.block_text {
3090 block_text.paint(self.origin + origin, self.line_height, cx);
3091 }
3092 }
3093
3094 pub fn shape(&self) -> CursorShape {
3095 self.shape
3096 }
3097}
3098
3099#[derive(Debug)]
3100pub struct HighlightedRange {
3101 pub start_y: Pixels,
3102 pub line_height: Pixels,
3103 pub lines: Vec<HighlightedRangeLine>,
3104 pub color: Hsla,
3105 pub corner_radius: Pixels,
3106}
3107
3108#[derive(Debug)]
3109pub struct HighlightedRangeLine {
3110 pub start_x: Pixels,
3111 pub end_x: Pixels,
3112}
3113
3114impl HighlightedRange {
3115 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3116 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3117 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3118 self.paint_lines(
3119 self.start_y + self.line_height,
3120 &self.lines[1..],
3121 bounds,
3122 cx,
3123 );
3124 } else {
3125 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3126 }
3127 }
3128
3129 fn paint_lines(
3130 &self,
3131 start_y: Pixels,
3132 lines: &[HighlightedRangeLine],
3133 bounds: Bounds<Pixels>,
3134 cx: &mut WindowContext,
3135 ) {
3136 if lines.is_empty() {
3137 return;
3138 }
3139
3140 let first_line = lines.first().unwrap();
3141 let last_line = lines.last().unwrap();
3142
3143 let first_top_left = point(first_line.start_x, start_y);
3144 let first_top_right = point(first_line.end_x, start_y);
3145
3146 let curve_height = point(Pixels::ZERO, self.corner_radius);
3147 let curve_width = |start_x: Pixels, end_x: Pixels| {
3148 let max = (end_x - start_x) / 2.;
3149 let width = if max < self.corner_radius {
3150 max
3151 } else {
3152 self.corner_radius
3153 };
3154
3155 point(width, Pixels::ZERO)
3156 };
3157
3158 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3159 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3160 path.curve_to(first_top_right + curve_height, first_top_right);
3161
3162 let mut iter = lines.iter().enumerate().peekable();
3163 while let Some((ix, line)) = iter.next() {
3164 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3165
3166 if let Some((_, next_line)) = iter.peek() {
3167 let next_top_right = point(next_line.end_x, bottom_right.y);
3168
3169 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3170 Ordering::Equal => {
3171 path.line_to(bottom_right);
3172 }
3173 Ordering::Less => {
3174 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3175 path.line_to(bottom_right - curve_height);
3176 if self.corner_radius > Pixels::ZERO {
3177 path.curve_to(bottom_right - curve_width, bottom_right);
3178 }
3179 path.line_to(next_top_right + curve_width);
3180 if self.corner_radius > Pixels::ZERO {
3181 path.curve_to(next_top_right + curve_height, next_top_right);
3182 }
3183 }
3184 Ordering::Greater => {
3185 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3186 path.line_to(bottom_right - curve_height);
3187 if self.corner_radius > Pixels::ZERO {
3188 path.curve_to(bottom_right + curve_width, bottom_right);
3189 }
3190 path.line_to(next_top_right - curve_width);
3191 if self.corner_radius > Pixels::ZERO {
3192 path.curve_to(next_top_right + curve_height, next_top_right);
3193 }
3194 }
3195 }
3196 } else {
3197 let curve_width = curve_width(line.start_x, line.end_x);
3198 path.line_to(bottom_right - curve_height);
3199 if self.corner_radius > Pixels::ZERO {
3200 path.curve_to(bottom_right - curve_width, bottom_right);
3201 }
3202
3203 let bottom_left = point(line.start_x, bottom_right.y);
3204 path.line_to(bottom_left + curve_width);
3205 if self.corner_radius > Pixels::ZERO {
3206 path.curve_to(bottom_left - curve_height, bottom_left);
3207 }
3208 }
3209 }
3210
3211 if first_line.start_x > last_line.start_x {
3212 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3213 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3214 path.line_to(second_top_left + curve_height);
3215 if self.corner_radius > Pixels::ZERO {
3216 path.curve_to(second_top_left + curve_width, second_top_left);
3217 }
3218 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3219 path.line_to(first_bottom_left - curve_width);
3220 if self.corner_radius > Pixels::ZERO {
3221 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3222 }
3223 }
3224
3225 path.line_to(first_top_left + curve_height);
3226 if self.corner_radius > Pixels::ZERO {
3227 path.curve_to(first_top_left + top_curve_width, first_top_left);
3228 }
3229 path.line_to(first_top_right - top_curve_width);
3230
3231 cx.paint_path(path, self.color);
3232 }
3233}
3234
3235pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3236 (delta.pow(1.5) / 100.0).into()
3237}
3238
3239fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3240 (delta.pow(1.2) / 300.0).into()
3241}
3242
3243#[cfg(test)]
3244mod tests {
3245 use super::*;
3246 use crate::{
3247 display_map::{BlockDisposition, BlockProperties},
3248 editor_tests::{init_test, update_test_language_settings},
3249 Editor, MultiBuffer,
3250 };
3251 use gpui::{EmptyView, TestAppContext};
3252 use language::language_settings;
3253 use log::info;
3254 use std::{num::NonZeroU32, sync::Arc};
3255 use util::test::sample_text;
3256
3257 #[gpui::test]
3258 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3259 init_test(cx, |_| {});
3260 let window = cx.add_window(|cx| {
3261 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3262 Editor::new(EditorMode::Full, buffer, None, cx)
3263 });
3264
3265 let editor = window.root(cx).unwrap();
3266 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3267 let element = EditorElement::new(&editor, style);
3268
3269 let layouts = window
3270 .update(cx, |editor, cx| {
3271 let snapshot = editor.snapshot(cx);
3272 element
3273 .shape_line_numbers(
3274 0..6,
3275 &Default::default(),
3276 DisplayPoint::new(0, 0),
3277 false,
3278 &snapshot,
3279 cx,
3280 )
3281 .0
3282 })
3283 .unwrap();
3284 assert_eq!(layouts.len(), 6);
3285
3286 let relative_rows = window
3287 .update(cx, |editor, cx| {
3288 let snapshot = editor.snapshot(cx);
3289 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3290 })
3291 .unwrap();
3292 assert_eq!(relative_rows[&0], 3);
3293 assert_eq!(relative_rows[&1], 2);
3294 assert_eq!(relative_rows[&2], 1);
3295 // current line has no relative number
3296 assert_eq!(relative_rows[&4], 1);
3297 assert_eq!(relative_rows[&5], 2);
3298
3299 // works if cursor is before screen
3300 let relative_rows = window
3301 .update(cx, |editor, cx| {
3302 let snapshot = editor.snapshot(cx);
3303
3304 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3305 })
3306 .unwrap();
3307 assert_eq!(relative_rows.len(), 3);
3308 assert_eq!(relative_rows[&3], 2);
3309 assert_eq!(relative_rows[&4], 3);
3310 assert_eq!(relative_rows[&5], 4);
3311
3312 // works if cursor is after screen
3313 let relative_rows = window
3314 .update(cx, |editor, cx| {
3315 let snapshot = editor.snapshot(cx);
3316
3317 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3318 })
3319 .unwrap();
3320 assert_eq!(relative_rows.len(), 3);
3321 assert_eq!(relative_rows[&0], 5);
3322 assert_eq!(relative_rows[&1], 4);
3323 assert_eq!(relative_rows[&2], 3);
3324 }
3325
3326 #[gpui::test]
3327 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3328 init_test(cx, |_| {});
3329
3330 let window = cx.add_window(|cx| {
3331 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3332 Editor::new(EditorMode::Full, buffer, None, cx)
3333 });
3334 let editor = window.root(cx).unwrap();
3335 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3336 let mut element = EditorElement::new(&editor, style);
3337
3338 window
3339 .update(cx, |editor, cx| {
3340 editor.cursor_shape = CursorShape::Block;
3341 editor.change_selections(None, cx, |s| {
3342 s.select_ranges([
3343 Point::new(0, 0)..Point::new(1, 0),
3344 Point::new(3, 2)..Point::new(3, 3),
3345 Point::new(5, 6)..Point::new(6, 0),
3346 ]);
3347 });
3348 })
3349 .unwrap();
3350 let state = cx
3351 .update_window(window.into(), |_, cx| {
3352 element.compute_layout(
3353 Bounds {
3354 origin: point(px(500.), px(500.)),
3355 size: size(px(500.), px(500.)),
3356 },
3357 cx,
3358 )
3359 })
3360 .unwrap();
3361
3362 assert_eq!(state.selections.len(), 1);
3363 let local_selections = &state.selections[0].1;
3364 assert_eq!(local_selections.len(), 3);
3365 // moves cursor back one line
3366 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3367 assert_eq!(
3368 local_selections[0].range,
3369 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3370 );
3371
3372 // moves cursor back one column
3373 assert_eq!(
3374 local_selections[1].range,
3375 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3376 );
3377 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3378
3379 // leaves cursor on the max point
3380 assert_eq!(
3381 local_selections[2].range,
3382 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3383 );
3384 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3385
3386 // active lines does not include 1 (even though the range of the selection does)
3387 assert_eq!(
3388 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3389 vec![0, 3, 5, 6]
3390 );
3391
3392 // multi-buffer support
3393 // in DisplayPoint co-ordinates, this is what we're dealing with:
3394 // 0: [[file
3395 // 1: header]]
3396 // 2: aaaaaa
3397 // 3: bbbbbb
3398 // 4: cccccc
3399 // 5:
3400 // 6: ...
3401 // 7: ffffff
3402 // 8: gggggg
3403 // 9: hhhhhh
3404 // 10:
3405 // 11: [[file
3406 // 12: header]]
3407 // 13: bbbbbb
3408 // 14: cccccc
3409 // 15: dddddd
3410 let window = cx.add_window(|cx| {
3411 let buffer = MultiBuffer::build_multi(
3412 [
3413 (
3414 &(sample_text(8, 6, 'a') + "\n"),
3415 vec![
3416 Point::new(0, 0)..Point::new(3, 0),
3417 Point::new(4, 0)..Point::new(7, 0),
3418 ],
3419 ),
3420 (
3421 &(sample_text(8, 6, 'a') + "\n"),
3422 vec![Point::new(1, 0)..Point::new(3, 0)],
3423 ),
3424 ],
3425 cx,
3426 );
3427 Editor::new(EditorMode::Full, buffer, None, cx)
3428 });
3429 let editor = window.root(cx).unwrap();
3430 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3431 let mut element = EditorElement::new(&editor, style);
3432 let state = window.update(cx, |editor, cx| {
3433 editor.cursor_shape = CursorShape::Block;
3434 editor.change_selections(None, cx, |s| {
3435 s.select_display_ranges([
3436 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3437 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3438 ]);
3439 });
3440 });
3441
3442 let state = cx
3443 .update_window(window.into(), |_, cx| {
3444 element.compute_layout(
3445 Bounds {
3446 origin: point(px(500.), px(500.)),
3447 size: size(px(500.), px(500.)),
3448 },
3449 cx,
3450 )
3451 })
3452 .unwrap();
3453 assert_eq!(state.selections.len(), 1);
3454 let local_selections = &state.selections[0].1;
3455 assert_eq!(local_selections.len(), 2);
3456
3457 // moves cursor on excerpt boundary back a line
3458 // and doesn't allow selection to bleed through
3459 assert_eq!(
3460 local_selections[0].range,
3461 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3462 );
3463 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3464 // moves cursor on buffer boundary back two lines
3465 // and doesn't allow selection to bleed through
3466 assert_eq!(
3467 local_selections[1].range,
3468 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3469 );
3470 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3471 }
3472
3473 #[gpui::test]
3474 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3475 init_test(cx, |_| {});
3476
3477 let window = cx.add_window(|cx| {
3478 let buffer = MultiBuffer::build_simple("", cx);
3479 Editor::new(EditorMode::Full, buffer, None, cx)
3480 });
3481 let editor = window.root(cx).unwrap();
3482 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3483 window
3484 .update(cx, |editor, cx| {
3485 editor.set_placeholder_text("hello", cx);
3486 editor.insert_blocks(
3487 [BlockProperties {
3488 style: BlockStyle::Fixed,
3489 disposition: BlockDisposition::Above,
3490 height: 3,
3491 position: Anchor::min(),
3492 render: Arc::new(|_| div().into_any()),
3493 }],
3494 None,
3495 cx,
3496 );
3497
3498 // Blur the editor so that it displays placeholder text.
3499 cx.blur();
3500 })
3501 .unwrap();
3502
3503 let mut element = EditorElement::new(&editor, style);
3504 let mut state = cx
3505 .update_window(window.into(), |_, cx| {
3506 element.compute_layout(
3507 Bounds {
3508 origin: point(px(500.), px(500.)),
3509 size: size(px(500.), px(500.)),
3510 },
3511 cx,
3512 )
3513 })
3514 .unwrap();
3515 let size = state.position_map.size;
3516
3517 assert_eq!(state.position_map.line_layouts.len(), 4);
3518 assert_eq!(
3519 state
3520 .line_numbers
3521 .iter()
3522 .map(Option::is_some)
3523 .collect::<Vec<_>>(),
3524 &[false, false, false, true]
3525 );
3526
3527 // Don't panic.
3528 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3529 cx.update_window(window.into(), |_, cx| {
3530 element.paint(bounds, &mut (), cx);
3531 })
3532 .unwrap()
3533 }
3534
3535 #[gpui::test]
3536 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3537 const TAB_SIZE: u32 = 4;
3538
3539 let input_text = "\t \t|\t| a b";
3540 let expected_invisibles = vec![
3541 Invisible::Tab {
3542 line_start_offset: 0,
3543 },
3544 Invisible::Whitespace {
3545 line_offset: TAB_SIZE as usize,
3546 },
3547 Invisible::Tab {
3548 line_start_offset: TAB_SIZE as usize + 1,
3549 },
3550 Invisible::Tab {
3551 line_start_offset: TAB_SIZE as usize * 2 + 1,
3552 },
3553 Invisible::Whitespace {
3554 line_offset: TAB_SIZE as usize * 3 + 1,
3555 },
3556 Invisible::Whitespace {
3557 line_offset: TAB_SIZE as usize * 3 + 3,
3558 },
3559 ];
3560 assert_eq!(
3561 expected_invisibles.len(),
3562 input_text
3563 .chars()
3564 .filter(|initial_char| initial_char.is_whitespace())
3565 .count(),
3566 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3567 );
3568
3569 init_test(cx, |s| {
3570 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3571 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3572 });
3573
3574 let actual_invisibles =
3575 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3576
3577 assert_eq!(expected_invisibles, actual_invisibles);
3578 }
3579
3580 #[gpui::test]
3581 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3582 init_test(cx, |s| {
3583 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3584 s.defaults.tab_size = NonZeroU32::new(4);
3585 });
3586
3587 for editor_mode_without_invisibles in [
3588 EditorMode::SingleLine,
3589 EditorMode::AutoHeight { max_lines: 100 },
3590 ] {
3591 let invisibles = collect_invisibles_from_new_editor(
3592 cx,
3593 editor_mode_without_invisibles,
3594 "\t\t\t| | a b",
3595 px(500.0),
3596 );
3597 assert!(invisibles.is_empty(),
3598 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3599 }
3600 }
3601
3602 #[gpui::test]
3603 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3604 let tab_size = 4;
3605 let input_text = "a\tbcd ".repeat(9);
3606 let repeated_invisibles = [
3607 Invisible::Tab {
3608 line_start_offset: 1,
3609 },
3610 Invisible::Whitespace {
3611 line_offset: tab_size as usize + 3,
3612 },
3613 Invisible::Whitespace {
3614 line_offset: tab_size as usize + 4,
3615 },
3616 Invisible::Whitespace {
3617 line_offset: tab_size as usize + 5,
3618 },
3619 ];
3620 let expected_invisibles = std::iter::once(repeated_invisibles)
3621 .cycle()
3622 .take(9)
3623 .flatten()
3624 .collect::<Vec<_>>();
3625 assert_eq!(
3626 expected_invisibles.len(),
3627 input_text
3628 .chars()
3629 .filter(|initial_char| initial_char.is_whitespace())
3630 .count(),
3631 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3632 );
3633 info!("Expected invisibles: {expected_invisibles:?}");
3634
3635 init_test(cx, |_| {});
3636
3637 // Put the same string with repeating whitespace pattern into editors of various size,
3638 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3639 let resize_step = 10.0;
3640 let mut editor_width = 200.0;
3641 while editor_width <= 1000.0 {
3642 update_test_language_settings(cx, |s| {
3643 s.defaults.tab_size = NonZeroU32::new(tab_size);
3644 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3645 s.defaults.preferred_line_length = Some(editor_width as u32);
3646 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3647 });
3648
3649 let actual_invisibles = collect_invisibles_from_new_editor(
3650 cx,
3651 EditorMode::Full,
3652 &input_text,
3653 px(editor_width),
3654 );
3655
3656 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3657 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3658 let mut i = 0;
3659 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3660 i = actual_index;
3661 match expected_invisibles.get(i) {
3662 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3663 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3664 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3665 _ => {
3666 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3667 }
3668 },
3669 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3670 }
3671 }
3672 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3673 assert!(
3674 missing_expected_invisibles.is_empty(),
3675 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3676 );
3677
3678 editor_width += resize_step;
3679 }
3680 }
3681
3682 fn collect_invisibles_from_new_editor(
3683 cx: &mut TestAppContext,
3684 editor_mode: EditorMode,
3685 input_text: &str,
3686 editor_width: Pixels,
3687 ) -> Vec<Invisible> {
3688 info!(
3689 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3690 editor_width.0
3691 );
3692 let window = cx.add_window(|cx| {
3693 let buffer = MultiBuffer::build_simple(&input_text, cx);
3694 Editor::new(editor_mode, buffer, None, cx)
3695 });
3696 let editor = window.root(cx).unwrap();
3697 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3698 let mut element = EditorElement::new(&editor, style);
3699 window
3700 .update(cx, |editor, cx| {
3701 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3702 editor.set_wrap_width(Some(editor_width), cx);
3703 })
3704 .unwrap();
3705 let layout_state = cx
3706 .update_window(window.into(), |_, cx| {
3707 element.compute_layout(
3708 Bounds {
3709 origin: point(px(500.), px(500.)),
3710 size: size(px(500.), px(500.)),
3711 },
3712 cx,
3713 )
3714 })
3715 .unwrap();
3716
3717 layout_state
3718 .position_map
3719 .line_layouts
3720 .iter()
3721 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3722 .flatten()
3723 .cloned()
3724 .collect()
3725 }
3726}
3727
3728pub fn register_action<T: Action>(
3729 view: &View<Editor>,
3730 cx: &mut WindowContext,
3731 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3732) {
3733 let view = view.clone();
3734 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3735 let action = action.downcast_ref().unwrap();
3736 if phase == DispatchPhase::Bubble {
3737 view.update(cx, |editor, cx| {
3738 listener(editor, action, cx);
3739 })
3740 }
3741 })
3742}
3743
3744fn compute_auto_height_layout(
3745 editor: &mut Editor,
3746 max_lines: usize,
3747 max_line_number_width: Pixels,
3748 known_dimensions: Size<Option<Pixels>>,
3749 cx: &mut ViewContext<Editor>,
3750) -> Option<Size<Pixels>> {
3751 let mut width = known_dimensions.width?;
3752 if let Some(height) = known_dimensions.height {
3753 return Some(size(width, height));
3754 }
3755
3756 let style = editor.style.as_ref().unwrap();
3757 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3758 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3759 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3760 let em_width = cx
3761 .text_system()
3762 .typographic_bounds(font_id, font_size, 'm')
3763 .unwrap()
3764 .size
3765 .width;
3766
3767 let mut snapshot = editor.snapshot(cx);
3768 let gutter_padding;
3769 let gutter_width;
3770 let gutter_margin;
3771 if snapshot.show_gutter {
3772 let descent = cx.text_system().descent(font_id, font_size);
3773 let gutter_padding_factor = 3.5;
3774 gutter_padding = (em_width * gutter_padding_factor).round();
3775 gutter_width = max_line_number_width + gutter_padding * 2.0;
3776 gutter_margin = -descent;
3777 } else {
3778 gutter_padding = Pixels::ZERO;
3779 gutter_width = Pixels::ZERO;
3780 gutter_margin = Pixels::ZERO;
3781 };
3782
3783 editor.gutter_width = gutter_width;
3784 let text_width = width - gutter_width;
3785 let overscroll = size(em_width, px(0.));
3786
3787 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3788 if editor.set_wrap_width(Some(editor_width), cx) {
3789 snapshot = editor.snapshot(cx);
3790 }
3791
3792 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3793 let height = scroll_height
3794 .max(line_height)
3795 .min(line_height * max_lines as f32);
3796
3797 Some(size(width, height))
3798}