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 } else {
580 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
581 hover_at(editor, None, cx);
582 if gutter_hovered && was_top {
583 cx.stop_propagation();
584 }
585 }
586 }
587
588 fn scroll(
589 editor: &mut Editor,
590 event: &ScrollWheelEvent,
591 position_map: &PositionMap,
592 bounds: &InteractiveBounds,
593 cx: &mut ViewContext<Editor>,
594 ) {
595 if !bounds.visibly_contains(&event.position, cx) {
596 return;
597 }
598
599 let line_height = position_map.line_height;
600 let max_glyph_width = position_map.em_width;
601 let (delta, axis) = match event.delta {
602 gpui::ScrollDelta::Pixels(mut pixels) => {
603 //Trackpad
604 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
605 (pixels, axis)
606 }
607
608 gpui::ScrollDelta::Lines(lines) => {
609 //Not trackpad
610 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
611 (pixels, None)
612 }
613 };
614
615 let scroll_position = position_map.snapshot.scroll_position();
616 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
617 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
618 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
619 editor.scroll(scroll_position, axis, cx);
620 cx.stop_propagation();
621 }
622
623 fn paint_background(
624 &self,
625 gutter_bounds: Bounds<Pixels>,
626 text_bounds: Bounds<Pixels>,
627 layout: &LayoutState,
628 cx: &mut WindowContext,
629 ) {
630 let bounds = gutter_bounds.union(&text_bounds);
631 let scroll_top =
632 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
633 let gutter_bg = cx.theme().colors().editor_gutter_background;
634 cx.paint_quad(fill(gutter_bounds, gutter_bg));
635 cx.paint_quad(fill(text_bounds, self.style.background));
636
637 if let EditorMode::Full = layout.mode {
638 let mut active_rows = layout.active_rows.iter().peekable();
639 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
640 let mut end_row = *start_row;
641 while active_rows.peek().map_or(false, |r| {
642 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
643 }) {
644 active_rows.next().unwrap();
645 end_row += 1;
646 }
647
648 if !contains_non_empty_selection {
649 let origin = point(
650 bounds.origin.x,
651 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
652 - scroll_top,
653 );
654 let size = size(
655 bounds.size.width,
656 layout.position_map.line_height * (end_row - start_row + 1) as f32,
657 );
658 let active_line_bg = cx.theme().colors().editor_active_line_background;
659 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
660 }
661 }
662
663 if let Some(highlighted_rows) = &layout.highlighted_rows {
664 let origin = point(
665 bounds.origin.x,
666 bounds.origin.y
667 + (layout.position_map.line_height * highlighted_rows.start as f32)
668 - scroll_top,
669 );
670 let size = size(
671 bounds.size.width,
672 layout.position_map.line_height * highlighted_rows.len() as f32,
673 );
674 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
675 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
676 }
677
678 let scroll_left =
679 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
680
681 for (wrap_position, active) in layout.wrap_guides.iter() {
682 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
683 - scroll_left;
684
685 if x < text_bounds.origin.x
686 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
687 {
688 continue;
689 }
690
691 let color = if *active {
692 cx.theme().colors().editor_active_wrap_guide
693 } else {
694 cx.theme().colors().editor_wrap_guide
695 };
696 cx.paint_quad(fill(
697 Bounds {
698 origin: point(x, text_bounds.origin.y),
699 size: size(px(1.), text_bounds.size.height),
700 },
701 color,
702 ));
703 }
704 }
705 }
706
707 fn paint_gutter(
708 &mut self,
709 bounds: Bounds<Pixels>,
710 layout: &mut LayoutState,
711 cx: &mut WindowContext,
712 ) {
713 let line_height = layout.position_map.line_height;
714
715 let scroll_position = layout.position_map.snapshot.scroll_position();
716 let scroll_top = scroll_position.y * line_height;
717
718 let show_gutter = matches!(
719 ProjectSettings::get_global(cx).git.git_gutter,
720 Some(GitGutterSetting::TrackedFiles)
721 );
722
723 if show_gutter {
724 Self::paint_diff_hunks(bounds, layout, cx);
725 }
726
727 for (ix, line) in layout.line_numbers.iter().enumerate() {
728 if let Some(line) = line {
729 let line_origin = bounds.origin
730 + point(
731 bounds.size.width - line.width - layout.gutter_padding,
732 ix as f32 * line_height - (scroll_top % line_height),
733 );
734
735 line.paint(line_origin, line_height, cx);
736 }
737 }
738
739 cx.with_z_index(1, |cx| {
740 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
741 if let Some(fold_indicator) = fold_indicator {
742 let mut fold_indicator = fold_indicator.into_any_element();
743 let available_space = size(
744 AvailableSpace::MinContent,
745 AvailableSpace::Definite(line_height * 0.55),
746 );
747 let fold_indicator_size = fold_indicator.measure(available_space, cx);
748
749 let position = point(
750 bounds.size.width - layout.gutter_padding,
751 ix as f32 * line_height - (scroll_top % line_height),
752 );
753 let centering_offset = point(
754 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
755 / 2.,
756 (line_height - fold_indicator_size.height) / 2.,
757 );
758 let origin = bounds.origin + position + centering_offset;
759 fold_indicator.draw(origin, available_space, cx);
760 }
761 }
762
763 if let Some(indicator) = layout.code_actions_indicator.take() {
764 let mut button = indicator.button.into_any_element();
765 let available_space = size(
766 AvailableSpace::MinContent,
767 AvailableSpace::Definite(line_height),
768 );
769 let indicator_size = button.measure(available_space, cx);
770
771 let mut x = Pixels::ZERO;
772 let mut y = indicator.row as f32 * line_height - scroll_top;
773 // Center indicator.
774 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
775 y += (line_height - indicator_size.height) / 2.;
776
777 button.draw(bounds.origin + point(x, y), available_space, cx);
778 }
779 });
780 }
781
782 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
783 let line_height = layout.position_map.line_height;
784
785 let scroll_position = layout.position_map.snapshot.scroll_position();
786 let scroll_top = scroll_position.y * line_height;
787
788 for hunk in &layout.display_hunks {
789 let (display_row_range, status) = match hunk {
790 //TODO: This rendering is entirely a horrible hack
791 &DisplayDiffHunk::Folded { display_row: row } => {
792 let start_y = row as f32 * line_height - scroll_top;
793 let end_y = start_y + line_height;
794
795 let width = 0.275 * line_height;
796 let highlight_origin = bounds.origin + point(-width, start_y);
797 let highlight_size = size(width * 2., end_y - start_y);
798 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
799 cx.paint_quad(quad(
800 highlight_bounds,
801 Corners::all(1. * line_height),
802 gpui::yellow(), // todo!("use the right color")
803 Edges::default(),
804 transparent_black(),
805 ));
806
807 continue;
808 }
809
810 DisplayDiffHunk::Unfolded {
811 display_row_range,
812 status,
813 } => (display_row_range, status),
814 };
815
816 let color = match status {
817 DiffHunkStatus::Added => cx.theme().status().created,
818 DiffHunkStatus::Modified => cx.theme().status().modified,
819
820 //TODO: This rendering is entirely a horrible hack
821 DiffHunkStatus::Removed => {
822 let row = display_row_range.start;
823
824 let offset = line_height / 2.;
825 let start_y = row as f32 * line_height - offset - scroll_top;
826 let end_y = start_y + line_height;
827
828 let width = 0.275 * line_height;
829 let highlight_origin = bounds.origin + point(-width, start_y);
830 let highlight_size = size(width * 2., end_y - start_y);
831 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
832 cx.paint_quad(quad(
833 highlight_bounds,
834 Corners::all(1. * line_height),
835 cx.theme().status().deleted,
836 Edges::default(),
837 transparent_black(),
838 ));
839
840 continue;
841 }
842 };
843
844 let start_row = display_row_range.start;
845 let end_row = display_row_range.end;
846
847 let start_y = start_row as f32 * line_height - scroll_top;
848 let end_y = end_row as f32 * line_height - scroll_top;
849
850 let width = 0.275 * line_height;
851 let highlight_origin = bounds.origin + point(-width, start_y);
852 let highlight_size = size(width * 2., end_y - start_y);
853 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
854 cx.paint_quad(quad(
855 highlight_bounds,
856 Corners::all(0.05 * line_height),
857 color, // todo!("use the right color")
858 Edges::default(),
859 transparent_black(),
860 ));
861 }
862 }
863
864 fn paint_text(
865 &mut self,
866 text_bounds: Bounds<Pixels>,
867 layout: &mut LayoutState,
868 cx: &mut WindowContext,
869 ) {
870 let start_row = layout.visible_display_row_range.start;
871 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
872 let line_end_overshoot = 0.15 * layout.position_map.line_height;
873 let whitespace_setting = self
874 .editor
875 .read(cx)
876 .buffer
877 .read(cx)
878 .settings_at(0, cx)
879 .show_whitespaces;
880
881 cx.with_content_mask(
882 Some(ContentMask {
883 bounds: text_bounds,
884 }),
885 |cx| {
886 let interactive_text_bounds = InteractiveBounds {
887 bounds: text_bounds,
888 stacking_order: cx.stacking_order().clone(),
889 };
890 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
891 if self
892 .editor
893 .read(cx)
894 .link_go_to_definition_state
895 .definitions
896 .is_empty()
897 {
898 cx.set_cursor_style(CursorStyle::IBeam);
899 } else {
900 cx.set_cursor_style(CursorStyle::PointingHand);
901 }
902 }
903
904 let fold_corner_radius = 0.15 * layout.position_map.line_height;
905 cx.with_element_id(Some("folds"), |cx| {
906 let snapshot = &layout.position_map.snapshot;
907 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
908 let fold_range = fold.range.clone();
909 let display_range = fold.range.start.to_display_point(&snapshot)
910 ..fold.range.end.to_display_point(&snapshot);
911 debug_assert_eq!(display_range.start.row(), display_range.end.row());
912 let row = display_range.start.row();
913
914 let line_layout = &layout.position_map.line_layouts
915 [(row - layout.visible_display_row_range.start) as usize]
916 .line;
917 let start_x = content_origin.x
918 + line_layout.x_for_index(display_range.start.column() as usize)
919 - layout.position_map.scroll_position.x;
920 let start_y = content_origin.y
921 + row as f32 * layout.position_map.line_height
922 - layout.position_map.scroll_position.y;
923 let end_x = content_origin.x
924 + line_layout.x_for_index(display_range.end.column() as usize)
925 - layout.position_map.scroll_position.x;
926
927 let fold_bounds = Bounds {
928 origin: point(start_x, start_y),
929 size: size(end_x - start_x, layout.position_map.line_height),
930 };
931
932 let fold_background = cx.with_z_index(1, |cx| {
933 div()
934 .id(fold.id)
935 .size_full()
936 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
937 .on_click(cx.listener_for(
938 &self.editor,
939 move |editor: &mut Editor, _, cx| {
940 editor.unfold_ranges(
941 [fold_range.start..fold_range.end],
942 true,
943 false,
944 cx,
945 );
946 cx.stop_propagation();
947 },
948 ))
949 .draw_and_update_state(
950 fold_bounds.origin,
951 fold_bounds.size,
952 cx,
953 |fold_element_state, cx| {
954 if fold_element_state.is_active() {
955 cx.theme().colors().ghost_element_active
956 } else if fold_bounds.contains(&cx.mouse_position()) {
957 cx.theme().colors().ghost_element_hover
958 } else {
959 cx.theme().colors().ghost_element_background
960 }
961 },
962 )
963 });
964
965 self.paint_highlighted_range(
966 display_range.clone(),
967 fold_background,
968 fold_corner_radius,
969 fold_corner_radius * 2.,
970 layout,
971 content_origin,
972 text_bounds,
973 cx,
974 );
975 }
976 });
977
978 for (range, color) in &layout.highlighted_ranges {
979 self.paint_highlighted_range(
980 range.clone(),
981 *color,
982 Pixels::ZERO,
983 line_end_overshoot,
984 layout,
985 content_origin,
986 text_bounds,
987 cx,
988 );
989 }
990
991 let mut cursors = SmallVec::<[Cursor; 32]>::new();
992 let corner_radius = 0.15 * layout.position_map.line_height;
993 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
994
995 for (selection_style, selections) in &layout.selections {
996 for selection in selections {
997 self.paint_highlighted_range(
998 selection.range.clone(),
999 selection_style.selection,
1000 corner_radius,
1001 corner_radius * 2.,
1002 layout,
1003 content_origin,
1004 text_bounds,
1005 cx,
1006 );
1007
1008 if selection.is_local && !selection.range.is_empty() {
1009 invisible_display_ranges.push(selection.range.clone());
1010 }
1011
1012 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1013 let cursor_position = selection.head;
1014 if layout
1015 .visible_display_row_range
1016 .contains(&cursor_position.row())
1017 {
1018 let cursor_row_layout = &layout.position_map.line_layouts
1019 [(cursor_position.row() - start_row) as usize]
1020 .line;
1021 let cursor_column = cursor_position.column() as usize;
1022
1023 let cursor_character_x =
1024 cursor_row_layout.x_for_index(cursor_column);
1025 let mut block_width = cursor_row_layout
1026 .x_for_index(cursor_column + 1)
1027 - cursor_character_x;
1028 if block_width == Pixels::ZERO {
1029 block_width = layout.position_map.em_width;
1030 }
1031 let block_text = if let CursorShape::Block = selection.cursor_shape
1032 {
1033 layout
1034 .position_map
1035 .snapshot
1036 .chars_at(cursor_position)
1037 .next()
1038 .and_then(|(character, _)| {
1039 // todo!() currently shape_line panics if text conatins newlines
1040 let text = if character == '\n' {
1041 SharedString::from(" ")
1042 } else {
1043 SharedString::from(character.to_string())
1044 };
1045 let len = text.len();
1046 cx.text_system()
1047 .shape_line(
1048 text,
1049 cursor_row_layout.font_size,
1050 &[TextRun {
1051 len,
1052 font: self.style.text.font(),
1053 color: self.style.background,
1054 background_color: None,
1055 underline: None,
1056 }],
1057 )
1058 .log_err()
1059 })
1060 } else {
1061 None
1062 };
1063
1064 let x = cursor_character_x - layout.position_map.scroll_position.x;
1065 let y = cursor_position.row() as f32
1066 * layout.position_map.line_height
1067 - layout.position_map.scroll_position.y;
1068 if selection.is_newest {
1069 self.editor.update(cx, |editor, _| {
1070 editor.pixel_position_of_newest_cursor = Some(point(
1071 text_bounds.origin.x + x + block_width / 2.,
1072 text_bounds.origin.y
1073 + y
1074 + layout.position_map.line_height / 2.,
1075 ))
1076 });
1077 }
1078 cursors.push(Cursor {
1079 color: selection_style.cursor,
1080 block_width,
1081 origin: point(x, y),
1082 line_height: layout.position_map.line_height,
1083 shape: selection.cursor_shape,
1084 block_text,
1085 });
1086 }
1087 }
1088 }
1089 }
1090
1091 for (ix, line_with_invisibles) in
1092 layout.position_map.line_layouts.iter().enumerate()
1093 {
1094 let row = start_row + ix as u32;
1095 line_with_invisibles.draw(
1096 layout,
1097 row,
1098 content_origin,
1099 whitespace_setting,
1100 &invisible_display_ranges,
1101 cx,
1102 )
1103 }
1104
1105 cx.with_z_index(0, |cx| {
1106 for cursor in cursors {
1107 cursor.paint(content_origin, cx);
1108 }
1109 });
1110 },
1111 )
1112 }
1113
1114 fn paint_overlays(
1115 &mut self,
1116 text_bounds: Bounds<Pixels>,
1117 layout: &mut LayoutState,
1118 cx: &mut WindowContext,
1119 ) {
1120 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1121 let start_row = layout.visible_display_row_range.start;
1122 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1123 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1124 let context_menu_size = context_menu.measure(available_space, cx);
1125
1126 let cursor_row_layout =
1127 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1128 let x = cursor_row_layout.x_for_index(position.column() as usize)
1129 - layout.position_map.scroll_position.x;
1130 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1131 - layout.position_map.scroll_position.y;
1132 let mut list_origin = content_origin + point(x, y);
1133 let list_width = context_menu_size.width;
1134 let list_height = context_menu_size.height;
1135
1136 // Snap the right edge of the list to the right edge of the window if
1137 // its horizontal bounds overflow.
1138 if list_origin.x + list_width > cx.viewport_size().width {
1139 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1140 }
1141
1142 if list_origin.y + list_height > text_bounds.lower_right().y {
1143 list_origin.y -= layout.position_map.line_height + list_height;
1144 }
1145
1146 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1147 }
1148
1149 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1150 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1151
1152 // This is safe because we check on layout whether the required row is available
1153 let hovered_row_layout =
1154 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1155
1156 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1157 // height. This is the size we will use to decide whether to render popovers above or below
1158 // the hovered line.
1159 let first_size = hover_popovers[0].measure(available_space, cx);
1160 let height_to_reserve =
1161 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1162
1163 // Compute Hovered Point
1164 let x = hovered_row_layout.x_for_index(position.column() as usize)
1165 - layout.position_map.scroll_position.x;
1166 let y = position.row() as f32 * layout.position_map.line_height
1167 - layout.position_map.scroll_position.y;
1168 let hovered_point = content_origin + point(x, y);
1169
1170 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1171 // There is enough space above. Render popovers above the hovered point
1172 let mut current_y = hovered_point.y;
1173 for mut hover_popover in hover_popovers {
1174 let size = hover_popover.measure(available_space, cx);
1175 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1176
1177 let x_out_of_bounds =
1178 text_bounds.upper_right().x - (popover_origin.x + size.width);
1179 if x_out_of_bounds < Pixels::ZERO {
1180 popover_origin.x = popover_origin.x + x_out_of_bounds;
1181 }
1182
1183 cx.break_content_mask(|cx| {
1184 hover_popover.draw(popover_origin, available_space, cx)
1185 });
1186
1187 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1188 }
1189 } else {
1190 // There is not enough space above. Render popovers below the hovered point
1191 let mut current_y = hovered_point.y + layout.position_map.line_height;
1192 for mut hover_popover in hover_popovers {
1193 let size = hover_popover.measure(available_space, cx);
1194 let mut popover_origin = point(hovered_point.x, current_y);
1195
1196 let x_out_of_bounds =
1197 text_bounds.upper_right().x - (popover_origin.x + size.width);
1198 if x_out_of_bounds < Pixels::ZERO {
1199 popover_origin.x = popover_origin.x + x_out_of_bounds;
1200 }
1201
1202 hover_popover.draw(popover_origin, available_space, cx);
1203
1204 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1205 }
1206 }
1207 }
1208
1209 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1210 let element = overlay()
1211 .position(mouse_context_menu.position)
1212 .child(mouse_context_menu.context_menu.clone())
1213 .anchor(AnchorCorner::TopLeft)
1214 .snap_to_window();
1215 element.into_any().draw(
1216 gpui::Point::default(),
1217 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1218 cx,
1219 );
1220 }
1221 }
1222
1223 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1224 bounds.upper_right().x - self.style.scrollbar_width
1225 }
1226
1227 fn paint_scrollbar(
1228 &mut self,
1229 bounds: Bounds<Pixels>,
1230 layout: &mut LayoutState,
1231 cx: &mut WindowContext,
1232 ) {
1233 if layout.mode != EditorMode::Full {
1234 return;
1235 }
1236
1237 let top = bounds.origin.y;
1238 let bottom = bounds.lower_left().y;
1239 let right = bounds.lower_right().x;
1240 let left = self.scrollbar_left(&bounds);
1241 let row_range = layout.scrollbar_row_range.clone();
1242 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1243
1244 let mut height = bounds.size.height;
1245 let mut first_row_y_offset = px(0.0);
1246
1247 // Impose a minimum height on the scrollbar thumb
1248 let row_height = height / max_row;
1249 let min_thumb_height = layout.position_map.line_height;
1250 let thumb_height = (row_range.end - row_range.start) * row_height;
1251 if thumb_height < min_thumb_height {
1252 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1253 height -= min_thumb_height - thumb_height;
1254 }
1255
1256 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1257
1258 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1259 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1260 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1261 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1262
1263 if layout.show_scrollbars {
1264 cx.paint_quad(quad(
1265 track_bounds,
1266 Corners::default(),
1267 cx.theme().colors().scrollbar_track_background,
1268 Edges {
1269 top: Pixels::ZERO,
1270 right: Pixels::ZERO,
1271 bottom: Pixels::ZERO,
1272 left: px(1.),
1273 },
1274 cx.theme().colors().scrollbar_track_border,
1275 ));
1276 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1277 if layout.is_singleton && scrollbar_settings.selections {
1278 let start_anchor = Anchor::min();
1279 let end_anchor = Anchor::max();
1280 let background_ranges = self
1281 .editor
1282 .read(cx)
1283 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1284 start_anchor..end_anchor,
1285 &layout.position_map.snapshot,
1286 50000,
1287 );
1288 for range in background_ranges {
1289 let start_y = y_for_row(range.start().row() as f32);
1290 let mut end_y = y_for_row(range.end().row() as f32);
1291 if end_y - start_y < px(1.) {
1292 end_y = start_y + px(1.);
1293 }
1294 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1295 cx.paint_quad(quad(
1296 bounds,
1297 Corners::default(),
1298 cx.theme().status().info,
1299 Edges {
1300 top: Pixels::ZERO,
1301 right: px(1.),
1302 bottom: Pixels::ZERO,
1303 left: px(1.),
1304 },
1305 cx.theme().colors().scrollbar_thumb_border,
1306 ));
1307 }
1308 }
1309
1310 if layout.is_singleton && scrollbar_settings.git_diff {
1311 for hunk in layout
1312 .position_map
1313 .snapshot
1314 .buffer_snapshot
1315 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1316 {
1317 let start_display = Point::new(hunk.buffer_range.start, 0)
1318 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1319 let end_display = Point::new(hunk.buffer_range.end, 0)
1320 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1321 let start_y = y_for_row(start_display.row() as f32);
1322 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1323 y_for_row((end_display.row() + 1) as f32)
1324 } else {
1325 y_for_row((end_display.row()) as f32)
1326 };
1327
1328 if end_y - start_y < px(1.) {
1329 end_y = start_y + px(1.);
1330 }
1331 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1332
1333 let color = match hunk.status() {
1334 DiffHunkStatus::Added => cx.theme().status().created,
1335 DiffHunkStatus::Modified => cx.theme().status().modified,
1336 DiffHunkStatus::Removed => cx.theme().status().deleted,
1337 };
1338 cx.paint_quad(quad(
1339 bounds,
1340 Corners::default(),
1341 color,
1342 Edges {
1343 top: Pixels::ZERO,
1344 right: px(1.),
1345 bottom: Pixels::ZERO,
1346 left: px(1.),
1347 },
1348 cx.theme().colors().scrollbar_thumb_border,
1349 ));
1350 }
1351 }
1352
1353 cx.paint_quad(quad(
1354 thumb_bounds,
1355 Corners::default(),
1356 cx.theme().colors().scrollbar_thumb_background,
1357 Edges {
1358 top: Pixels::ZERO,
1359 right: px(1.),
1360 bottom: Pixels::ZERO,
1361 left: px(1.),
1362 },
1363 cx.theme().colors().scrollbar_thumb_border,
1364 ));
1365 }
1366
1367 let interactive_track_bounds = InteractiveBounds {
1368 bounds: track_bounds,
1369 stacking_order: cx.stacking_order().clone(),
1370 };
1371 let mut mouse_position = cx.mouse_position();
1372 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1373 cx.set_cursor_style(CursorStyle::Arrow);
1374 }
1375
1376 cx.on_mouse_event({
1377 let editor = self.editor.clone();
1378 move |event: &MouseMoveEvent, phase, cx| {
1379 if phase == DispatchPhase::Capture {
1380 return;
1381 }
1382
1383 editor.update(cx, |editor, cx| {
1384 if event.pressed_button == Some(MouseButton::Left)
1385 && editor.scroll_manager.is_dragging_scrollbar()
1386 {
1387 let y = mouse_position.y;
1388 let new_y = event.position.y;
1389 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1390 let mut position = editor.scroll_position(cx);
1391 position.y += (new_y - y) * (max_row as f32) / height;
1392 if position.y < 0.0 {
1393 position.y = 0.0;
1394 }
1395 editor.set_scroll_position(position, cx);
1396 }
1397
1398 mouse_position = event.position;
1399 cx.stop_propagation();
1400 } else {
1401 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1402 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1403 editor.scroll_manager.show_scrollbar(cx);
1404 }
1405 }
1406 })
1407 }
1408 });
1409
1410 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1411 cx.on_mouse_event({
1412 let editor = self.editor.clone();
1413 move |_: &MouseUpEvent, phase, cx| {
1414 if phase == DispatchPhase::Capture {
1415 return;
1416 }
1417
1418 editor.update(cx, |editor, cx| {
1419 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1420 cx.stop_propagation();
1421 });
1422 }
1423 });
1424 } else {
1425 cx.on_mouse_event({
1426 let editor = self.editor.clone();
1427 move |event: &MouseDownEvent, phase, cx| {
1428 if phase == DispatchPhase::Capture {
1429 return;
1430 }
1431
1432 editor.update(cx, |editor, cx| {
1433 if track_bounds.contains(&event.position) {
1434 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1435
1436 let y = event.position.y;
1437 if y < thumb_top || thumb_bottom < y {
1438 let center_row =
1439 ((y - top) * max_row as f32 / height).round() as u32;
1440 let top_row = center_row
1441 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1442 let mut position = editor.scroll_position(cx);
1443 position.y = top_row as f32;
1444 editor.set_scroll_position(position, cx);
1445 } else {
1446 editor.scroll_manager.show_scrollbar(cx);
1447 }
1448
1449 cx.stop_propagation();
1450 }
1451 });
1452 }
1453 });
1454 }
1455 }
1456
1457 #[allow(clippy::too_many_arguments)]
1458 fn paint_highlighted_range(
1459 &self,
1460 range: Range<DisplayPoint>,
1461 color: Hsla,
1462 corner_radius: Pixels,
1463 line_end_overshoot: Pixels,
1464 layout: &LayoutState,
1465 content_origin: gpui::Point<Pixels>,
1466 bounds: Bounds<Pixels>,
1467 cx: &mut WindowContext,
1468 ) {
1469 let start_row = layout.visible_display_row_range.start;
1470 let end_row = layout.visible_display_row_range.end;
1471 if range.start != range.end {
1472 let row_range = if range.end.column() == 0 {
1473 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1474 } else {
1475 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1476 };
1477
1478 let highlighted_range = HighlightedRange {
1479 color,
1480 line_height: layout.position_map.line_height,
1481 corner_radius,
1482 start_y: content_origin.y
1483 + row_range.start as f32 * layout.position_map.line_height
1484 - layout.position_map.scroll_position.y,
1485 lines: row_range
1486 .into_iter()
1487 .map(|row| {
1488 let line_layout =
1489 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1490 HighlightedRangeLine {
1491 start_x: if row == range.start.row() {
1492 content_origin.x
1493 + line_layout.x_for_index(range.start.column() as usize)
1494 - layout.position_map.scroll_position.x
1495 } else {
1496 content_origin.x - layout.position_map.scroll_position.x
1497 },
1498 end_x: if row == range.end.row() {
1499 content_origin.x
1500 + line_layout.x_for_index(range.end.column() as usize)
1501 - layout.position_map.scroll_position.x
1502 } else {
1503 content_origin.x + line_layout.width + line_end_overshoot
1504 - layout.position_map.scroll_position.x
1505 },
1506 }
1507 })
1508 .collect(),
1509 };
1510
1511 highlighted_range.paint(bounds, cx);
1512 }
1513 }
1514
1515 fn paint_blocks(
1516 &mut self,
1517 bounds: Bounds<Pixels>,
1518 layout: &mut LayoutState,
1519 cx: &mut WindowContext,
1520 ) {
1521 let scroll_position = layout.position_map.snapshot.scroll_position();
1522 let scroll_left = scroll_position.x * layout.position_map.em_width;
1523 let scroll_top = scroll_position.y * layout.position_map.line_height;
1524
1525 for mut block in layout.blocks.drain(..) {
1526 let mut origin = bounds.origin
1527 + point(
1528 Pixels::ZERO,
1529 block.row as f32 * layout.position_map.line_height - scroll_top,
1530 );
1531 if !matches!(block.style, BlockStyle::Sticky) {
1532 origin += point(-scroll_left, Pixels::ZERO);
1533 }
1534 block.element.draw(origin, block.available_space, cx);
1535 }
1536 }
1537
1538 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1539 let style = &self.style;
1540 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1541 let layout = cx
1542 .text_system()
1543 .shape_line(
1544 SharedString::from(" ".repeat(column)),
1545 font_size,
1546 &[TextRun {
1547 len: column,
1548 font: style.text.font(),
1549 color: Hsla::default(),
1550 background_color: None,
1551 underline: None,
1552 }],
1553 )
1554 .unwrap();
1555
1556 layout.width
1557 }
1558
1559 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1560 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1561 self.column_pixels(digit_count, cx)
1562 }
1563
1564 //Folds contained in a hunk are ignored apart from shrinking visual size
1565 //If a fold contains any hunks then that fold line is marked as modified
1566 fn layout_git_gutters(
1567 &self,
1568 display_rows: Range<u32>,
1569 snapshot: &EditorSnapshot,
1570 ) -> Vec<DisplayDiffHunk> {
1571 let buffer_snapshot = &snapshot.buffer_snapshot;
1572
1573 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1574 .to_point(snapshot)
1575 .row;
1576 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1577 .to_point(snapshot)
1578 .row;
1579
1580 buffer_snapshot
1581 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1582 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1583 .dedup()
1584 .collect()
1585 }
1586
1587 fn calculate_relative_line_numbers(
1588 &self,
1589 snapshot: &EditorSnapshot,
1590 rows: &Range<u32>,
1591 relative_to: Option<u32>,
1592 ) -> HashMap<u32, u32> {
1593 let mut relative_rows: HashMap<u32, u32> = Default::default();
1594 let Some(relative_to) = relative_to else {
1595 return relative_rows;
1596 };
1597
1598 let start = rows.start.min(relative_to);
1599 let end = rows.end.max(relative_to);
1600
1601 let buffer_rows = snapshot
1602 .buffer_rows(start)
1603 .take(1 + (end - start) as usize)
1604 .collect::<Vec<_>>();
1605
1606 let head_idx = relative_to - start;
1607 let mut delta = 1;
1608 let mut i = head_idx + 1;
1609 while i < buffer_rows.len() as u32 {
1610 if buffer_rows[i as usize].is_some() {
1611 if rows.contains(&(i + start)) {
1612 relative_rows.insert(i + start, delta);
1613 }
1614 delta += 1;
1615 }
1616 i += 1;
1617 }
1618 delta = 1;
1619 i = head_idx.min(buffer_rows.len() as u32 - 1);
1620 while i > 0 && buffer_rows[i as usize].is_none() {
1621 i -= 1;
1622 }
1623
1624 while i > 0 {
1625 i -= 1;
1626 if buffer_rows[i as usize].is_some() {
1627 if rows.contains(&(i + start)) {
1628 relative_rows.insert(i + start, delta);
1629 }
1630 delta += 1;
1631 }
1632 }
1633
1634 relative_rows
1635 }
1636
1637 fn shape_line_numbers(
1638 &self,
1639 rows: Range<u32>,
1640 active_rows: &BTreeMap<u32, bool>,
1641 newest_selection_head: DisplayPoint,
1642 is_singleton: bool,
1643 snapshot: &EditorSnapshot,
1644 cx: &ViewContext<Editor>,
1645 ) -> (
1646 Vec<Option<ShapedLine>>,
1647 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1648 ) {
1649 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1650 let include_line_numbers = snapshot.mode == EditorMode::Full;
1651 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1652 let mut fold_statuses = Vec::with_capacity(rows.len());
1653 let mut line_number = String::new();
1654 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1655 let relative_to = if is_relative {
1656 Some(newest_selection_head.row())
1657 } else {
1658 None
1659 };
1660
1661 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1662
1663 for (ix, row) in snapshot
1664 .buffer_rows(rows.start)
1665 .take((rows.end - rows.start) as usize)
1666 .enumerate()
1667 {
1668 let display_row = rows.start + ix as u32;
1669 let (active, color) = if active_rows.contains_key(&display_row) {
1670 (true, cx.theme().colors().editor_active_line_number)
1671 } else {
1672 (false, cx.theme().colors().editor_line_number)
1673 };
1674 if let Some(buffer_row) = row {
1675 if include_line_numbers {
1676 line_number.clear();
1677 let default_number = buffer_row + 1;
1678 let number = relative_rows
1679 .get(&(ix as u32 + rows.start))
1680 .unwrap_or(&default_number);
1681 write!(&mut line_number, "{}", number).unwrap();
1682 let run = TextRun {
1683 len: line_number.len(),
1684 font: self.style.text.font(),
1685 color,
1686 background_color: None,
1687 underline: None,
1688 };
1689 let shaped_line = cx
1690 .text_system()
1691 .shape_line(line_number.clone().into(), font_size, &[run])
1692 .unwrap();
1693 shaped_line_numbers.push(Some(shaped_line));
1694 fold_statuses.push(
1695 is_singleton
1696 .then(|| {
1697 snapshot
1698 .fold_for_line(buffer_row)
1699 .map(|fold_status| (fold_status, buffer_row, active))
1700 })
1701 .flatten(),
1702 )
1703 }
1704 } else {
1705 fold_statuses.push(None);
1706 shaped_line_numbers.push(None);
1707 }
1708 }
1709
1710 (shaped_line_numbers, fold_statuses)
1711 }
1712
1713 fn layout_lines(
1714 &self,
1715 rows: Range<u32>,
1716 line_number_layouts: &[Option<ShapedLine>],
1717 snapshot: &EditorSnapshot,
1718 cx: &ViewContext<Editor>,
1719 ) -> Vec<LineWithInvisibles> {
1720 if rows.start >= rows.end {
1721 return Vec::new();
1722 }
1723
1724 // Show the placeholder when the editor is empty
1725 if snapshot.is_empty() {
1726 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1727 let placeholder_color = cx.theme().colors().text_placeholder;
1728 let placeholder_text = snapshot.placeholder_text();
1729
1730 let placeholder_lines = placeholder_text
1731 .as_ref()
1732 .map_or("", AsRef::as_ref)
1733 .split('\n')
1734 .skip(rows.start as usize)
1735 .chain(iter::repeat(""))
1736 .take(rows.len());
1737 placeholder_lines
1738 .filter_map(move |line| {
1739 let run = TextRun {
1740 len: line.len(),
1741 font: self.style.text.font(),
1742 color: placeholder_color,
1743 background_color: None,
1744 underline: Default::default(),
1745 };
1746 cx.text_system()
1747 .shape_line(line.to_string().into(), font_size, &[run])
1748 .log_err()
1749 })
1750 .map(|line| LineWithInvisibles {
1751 line,
1752 invisibles: Vec::new(),
1753 })
1754 .collect()
1755 } else {
1756 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1757 LineWithInvisibles::from_chunks(
1758 chunks,
1759 &self.style.text,
1760 MAX_LINE_LEN,
1761 rows.len() as usize,
1762 line_number_layouts,
1763 snapshot.mode,
1764 cx,
1765 )
1766 }
1767 }
1768
1769 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1770 self.editor.update(cx, |editor, cx| {
1771 let snapshot = editor.snapshot(cx);
1772 let style = self.style.clone();
1773
1774 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1775 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1776 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1777 let em_width = cx
1778 .text_system()
1779 .typographic_bounds(font_id, font_size, 'm')
1780 .unwrap()
1781 .size
1782 .width;
1783 let em_advance = cx
1784 .text_system()
1785 .advance(font_id, font_size, 'm')
1786 .unwrap()
1787 .width;
1788
1789 let gutter_padding;
1790 let gutter_width;
1791 let gutter_margin;
1792 if snapshot.show_gutter {
1793 let descent = cx.text_system().descent(font_id, font_size);
1794
1795 let gutter_padding_factor = 3.5;
1796 gutter_padding = (em_width * gutter_padding_factor).round();
1797 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1798 gutter_margin = -descent;
1799 } else {
1800 gutter_padding = Pixels::ZERO;
1801 gutter_width = Pixels::ZERO;
1802 gutter_margin = Pixels::ZERO;
1803 };
1804
1805 editor.gutter_width = gutter_width;
1806
1807 let text_width = bounds.size.width - gutter_width;
1808 let overscroll = size(em_width, px(0.));
1809 let _snapshot = {
1810 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1811
1812 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1813 let wrap_width = match editor.soft_wrap_mode(cx) {
1814 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1815 SoftWrap::EditorWidth => editor_width,
1816 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1817 };
1818
1819 if editor.set_wrap_width(Some(wrap_width), cx) {
1820 editor.snapshot(cx)
1821 } else {
1822 snapshot
1823 }
1824 };
1825
1826 let wrap_guides = editor
1827 .wrap_guides(cx)
1828 .iter()
1829 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1830 .collect::<SmallVec<[_; 2]>>();
1831
1832 let gutter_size = size(gutter_width, bounds.size.height);
1833 let text_size = size(text_width, bounds.size.height);
1834
1835 let autoscroll_horizontally =
1836 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1837 let mut snapshot = editor.snapshot(cx);
1838
1839 let scroll_position = snapshot.scroll_position();
1840 // The scroll position is a fractional point, the whole number of which represents
1841 // the top of the window in terms of display rows.
1842 let start_row = scroll_position.y as u32;
1843 let height_in_lines = f32::from(bounds.size.height / line_height);
1844 let max_row = snapshot.max_point().row();
1845
1846 // Add 1 to ensure selections bleed off screen
1847 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1848
1849 let start_anchor = if start_row == 0 {
1850 Anchor::min()
1851 } else {
1852 snapshot
1853 .buffer_snapshot
1854 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1855 };
1856 let end_anchor = if end_row > max_row {
1857 Anchor::max()
1858 } else {
1859 snapshot
1860 .buffer_snapshot
1861 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1862 };
1863
1864 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1865 let mut active_rows = BTreeMap::new();
1866 let is_singleton = editor.is_singleton(cx);
1867
1868 let highlighted_rows = editor.highlighted_rows();
1869 let highlighted_ranges = editor.background_highlights_in_range(
1870 start_anchor..end_anchor,
1871 &snapshot.display_snapshot,
1872 cx.theme().colors(),
1873 );
1874
1875 let mut newest_selection_head = None;
1876
1877 if editor.show_local_selections {
1878 let mut local_selections: Vec<Selection<Point>> = editor
1879 .selections
1880 .disjoint_in_range(start_anchor..end_anchor, cx);
1881 local_selections.extend(editor.selections.pending(cx));
1882 let mut layouts = Vec::new();
1883 let newest = editor.selections.newest(cx);
1884 for selection in local_selections.drain(..) {
1885 let is_empty = selection.start == selection.end;
1886 let is_newest = selection == newest;
1887
1888 let layout = SelectionLayout::new(
1889 selection,
1890 editor.selections.line_mode,
1891 editor.cursor_shape,
1892 &snapshot.display_snapshot,
1893 is_newest,
1894 true,
1895 );
1896 if is_newest {
1897 newest_selection_head = Some(layout.head);
1898 }
1899
1900 for row in cmp::max(layout.active_rows.start, start_row)
1901 ..=cmp::min(layout.active_rows.end, end_row)
1902 {
1903 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1904 *contains_non_empty_selection |= !is_empty;
1905 }
1906 layouts.push(layout);
1907 }
1908
1909 selections.push((style.local_player, layouts));
1910 }
1911
1912 if let Some(collaboration_hub) = &editor.collaboration_hub {
1913 // When following someone, render the local selections in their color.
1914 if let Some(leader_id) = editor.leader_peer_id {
1915 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1916 if let Some(participant_index) = collaboration_hub
1917 .user_participant_indices(cx)
1918 .get(&collaborator.user_id)
1919 {
1920 if let Some((local_selection_style, _)) = selections.first_mut() {
1921 *local_selection_style = cx
1922 .theme()
1923 .players()
1924 .color_for_participant(participant_index.0);
1925 }
1926 }
1927 }
1928 }
1929
1930 let mut remote_selections = HashMap::default();
1931 for selection in snapshot.remote_selections_in_range(
1932 &(start_anchor..end_anchor),
1933 collaboration_hub.as_ref(),
1934 cx,
1935 ) {
1936 let selection_style = if let Some(participant_index) = selection.participant_index {
1937 cx.theme()
1938 .players()
1939 .color_for_participant(participant_index.0)
1940 } else {
1941 cx.theme().players().absent()
1942 };
1943
1944 // Don't re-render the leader's selections, since the local selections
1945 // match theirs.
1946 if Some(selection.peer_id) == editor.leader_peer_id {
1947 continue;
1948 }
1949
1950 remote_selections
1951 .entry(selection.replica_id)
1952 .or_insert((selection_style, Vec::new()))
1953 .1
1954 .push(SelectionLayout::new(
1955 selection.selection,
1956 selection.line_mode,
1957 selection.cursor_shape,
1958 &snapshot.display_snapshot,
1959 false,
1960 false,
1961 ));
1962 }
1963
1964 selections.extend(remote_selections.into_values());
1965 }
1966
1967 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1968 let show_scrollbars = match scrollbar_settings.show {
1969 ShowScrollbar::Auto => {
1970 // Git
1971 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1972 ||
1973 // Selections
1974 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1975 // Scrollmanager
1976 || editor.scroll_manager.scrollbars_visible()
1977 }
1978 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1979 ShowScrollbar::Always => true,
1980 ShowScrollbar::Never => false,
1981 };
1982
1983 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1984 let newest = editor.selections.newest::<Point>(cx);
1985 SelectionLayout::new(
1986 newest,
1987 editor.selections.line_mode,
1988 editor.cursor_shape,
1989 &snapshot.display_snapshot,
1990 true,
1991 true,
1992 )
1993 .head
1994 });
1995
1996 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1997 start_row..end_row,
1998 &active_rows,
1999 head_for_relative,
2000 is_singleton,
2001 &snapshot,
2002 cx,
2003 );
2004
2005 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2006
2007 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2008
2009 let mut max_visible_line_width = Pixels::ZERO;
2010 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2011 for line_with_invisibles in &line_layouts {
2012 if line_with_invisibles.line.width > max_visible_line_width {
2013 max_visible_line_width = line_with_invisibles.line.width;
2014 }
2015 }
2016
2017 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2018 .unwrap()
2019 .width;
2020 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2021
2022 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2023 self.layout_blocks(
2024 start_row..end_row,
2025 &snapshot,
2026 bounds.size.width,
2027 scroll_width,
2028 gutter_padding,
2029 gutter_width,
2030 em_width,
2031 gutter_width + gutter_margin,
2032 line_height,
2033 &style,
2034 &line_layouts,
2035 editor,
2036 cx,
2037 )
2038 });
2039
2040 let scroll_max = point(
2041 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2042 max_row as f32,
2043 );
2044
2045 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2046
2047 let autoscrolled = if autoscroll_horizontally {
2048 editor.autoscroll_horizontally(
2049 start_row,
2050 text_size.width,
2051 scroll_width,
2052 em_width,
2053 &line_layouts,
2054 cx,
2055 )
2056 } else {
2057 false
2058 };
2059
2060 if clamped || autoscrolled {
2061 snapshot = editor.snapshot(cx);
2062 }
2063
2064 let mut context_menu = None;
2065 let mut code_actions_indicator = None;
2066 if let Some(newest_selection_head) = newest_selection_head {
2067 if (start_row..end_row).contains(&newest_selection_head.row()) {
2068 if editor.context_menu_visible() {
2069 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2070 context_menu =
2071 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2072 }
2073
2074 let active = matches!(
2075 editor.context_menu.read().as_ref(),
2076 Some(crate::ContextMenu::CodeActions(_))
2077 );
2078
2079 code_actions_indicator = editor
2080 .render_code_actions_indicator(&style, active, cx)
2081 .map(|element| CodeActionsIndicator {
2082 row: newest_selection_head.row(),
2083 button: element,
2084 });
2085 }
2086 }
2087
2088 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2089 let max_size = size(
2090 (120. * em_width) // Default size
2091 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2092 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2093 (16. * line_height) // Default size
2094 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2095 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2096 );
2097
2098 let hover = editor.hover_state.render(
2099 &snapshot,
2100 &style,
2101 visible_rows,
2102 max_size,
2103 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2104 cx,
2105 );
2106
2107 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2108 editor.render_fold_indicators(
2109 fold_statuses,
2110 &style,
2111 editor.gutter_hovered,
2112 line_height,
2113 gutter_margin,
2114 cx,
2115 )
2116 });
2117
2118 let invisible_symbol_font_size = font_size / 2.;
2119 let tab_invisible = cx
2120 .text_system()
2121 .shape_line(
2122 "→".into(),
2123 invisible_symbol_font_size,
2124 &[TextRun {
2125 len: "→".len(),
2126 font: self.style.text.font(),
2127 color: cx.theme().colors().editor_invisible,
2128 background_color: None,
2129 underline: None,
2130 }],
2131 )
2132 .unwrap();
2133 let space_invisible = cx
2134 .text_system()
2135 .shape_line(
2136 "•".into(),
2137 invisible_symbol_font_size,
2138 &[TextRun {
2139 len: "•".len(),
2140 font: self.style.text.font(),
2141 color: cx.theme().colors().editor_invisible,
2142 background_color: None,
2143 underline: None,
2144 }],
2145 )
2146 .unwrap();
2147
2148 LayoutState {
2149 mode: snapshot.mode,
2150 position_map: Arc::new(PositionMap {
2151 size: bounds.size,
2152 scroll_position: point(
2153 scroll_position.x * em_width,
2154 scroll_position.y * line_height,
2155 ),
2156 scroll_max,
2157 line_layouts,
2158 line_height,
2159 em_width,
2160 em_advance,
2161 snapshot,
2162 }),
2163 visible_anchor_range: start_anchor..end_anchor,
2164 visible_display_row_range: start_row..end_row,
2165 wrap_guides,
2166 gutter_size,
2167 gutter_padding,
2168 text_size,
2169 scrollbar_row_range,
2170 show_scrollbars,
2171 is_singleton,
2172 max_row,
2173 gutter_margin,
2174 active_rows,
2175 highlighted_rows,
2176 highlighted_ranges,
2177 line_numbers,
2178 display_hunks,
2179 blocks,
2180 selections,
2181 context_menu,
2182 code_actions_indicator,
2183 fold_indicators,
2184 tab_invisible,
2185 space_invisible,
2186 hover_popovers: hover,
2187 }
2188 })
2189 }
2190
2191 #[allow(clippy::too_many_arguments)]
2192 fn layout_blocks(
2193 &self,
2194 rows: Range<u32>,
2195 snapshot: &EditorSnapshot,
2196 editor_width: Pixels,
2197 scroll_width: Pixels,
2198 gutter_padding: Pixels,
2199 gutter_width: Pixels,
2200 em_width: Pixels,
2201 text_x: Pixels,
2202 line_height: Pixels,
2203 style: &EditorStyle,
2204 line_layouts: &[LineWithInvisibles],
2205 editor: &mut Editor,
2206 cx: &mut ViewContext<Editor>,
2207 ) -> (Pixels, Vec<BlockLayout>) {
2208 let mut block_id = 0;
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 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, _, 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 div()
2293 .id(("path header container", block_id))
2294 .size_full()
2295 .p_1p5()
2296 .child(
2297 h_stack()
2298 .id("path header block")
2299 .py_1p5()
2300 .pl_3()
2301 .pr_2()
2302 .rounded_lg()
2303 .shadow_md()
2304 .border()
2305 .border_color(cx.theme().colors().border)
2306 .bg(cx.theme().colors().editor_subheader_background)
2307 .justify_between()
2308 .hover(|style| style.bg(cx.theme().colors().element_hover))
2309 .child(
2310 h_stack().gap_3().child(
2311 h_stack()
2312 .gap_2()
2313 .child(Label::new(
2314 filename
2315 .map(SharedString::from)
2316 .unwrap_or_else(|| "untitled".into()),
2317 ))
2318 .when_some(parent_path, |then, path| {
2319 then.child(Label::new(path).color(Color::Muted))
2320 }),
2321 ),
2322 )
2323 .when_some(jump_handler, |this, jump_handler| {
2324 this.cursor_pointer()
2325 .tooltip(|cx| {
2326 Tooltip::for_action(
2327 "Jump to Buffer",
2328 &OpenExcerpts,
2329 cx,
2330 )
2331 })
2332 .on_mouse_down(MouseButton::Left, |_, cx| {
2333 cx.stop_propagation()
2334 })
2335 .on_click(jump_handler)
2336 }),
2337 )
2338 } else {
2339 h_stack()
2340 .id(("collapsed context", block_id))
2341 .size_full()
2342 .gap(gutter_padding)
2343 .child(
2344 h_stack()
2345 .justify_end()
2346 .flex_none()
2347 .w(gutter_width - gutter_padding)
2348 .h_full()
2349 .text_buffer(cx)
2350 .text_color(cx.theme().colors().editor_line_number)
2351 .child("..."),
2352 )
2353 .map(|this| {
2354 if let Some(jump_handler) = jump_handler {
2355 this.child(
2356 ButtonLike::new("jump to collapsed context")
2357 .style(ButtonStyle::Transparent)
2358 .full_width()
2359 .on_click(jump_handler)
2360 .tooltip(|cx| {
2361 Tooltip::for_action(
2362 "Jump to Buffer",
2363 &OpenExcerpts,
2364 cx,
2365 )
2366 })
2367 .child(
2368 div()
2369 .h_px()
2370 .w_full()
2371 .bg(cx.theme().colors().border_variant)
2372 .group_hover("", |style| {
2373 style.bg(cx.theme().colors().border)
2374 }),
2375 ),
2376 )
2377 } else {
2378 this.child(div().size_full().bg(gpui::green()))
2379 }
2380 })
2381 // .child("⋯")
2382 // .children(jump_icon) // .p_x(gutter_padding)
2383 };
2384 element.into_any()
2385 }
2386 };
2387
2388 let size = element.measure(available_space, cx);
2389 (element, size)
2390 };
2391
2392 let mut fixed_block_max_width = Pixels::ZERO;
2393 let mut blocks = Vec::new();
2394 for (row, block) in fixed_blocks {
2395 let available_space = size(
2396 AvailableSpace::MinContent,
2397 AvailableSpace::Definite(block.height() as f32 * line_height),
2398 );
2399 let (element, element_size) =
2400 render_block(block, available_space, block_id, editor, cx);
2401 block_id += 1;
2402 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2403 blocks.push(BlockLayout {
2404 row,
2405 element,
2406 available_space,
2407 style: BlockStyle::Fixed,
2408 });
2409 }
2410 for (row, block) in non_fixed_blocks {
2411 let style = match block {
2412 TransformBlock::Custom(block) => block.style(),
2413 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2414 };
2415 let width = match style {
2416 BlockStyle::Sticky => editor_width,
2417 BlockStyle::Flex => editor_width
2418 .max(fixed_block_max_width)
2419 .max(gutter_width + scroll_width),
2420 BlockStyle::Fixed => unreachable!(),
2421 };
2422 let available_space = size(
2423 AvailableSpace::Definite(width),
2424 AvailableSpace::Definite(block.height() as f32 * line_height),
2425 );
2426 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2427 block_id += 1;
2428 blocks.push(BlockLayout {
2429 row,
2430 element,
2431 available_space,
2432 style,
2433 });
2434 }
2435 (
2436 scroll_width.max(fixed_block_max_width - gutter_width),
2437 blocks,
2438 )
2439 }
2440
2441 fn paint_mouse_listeners(
2442 &mut self,
2443 bounds: Bounds<Pixels>,
2444 gutter_bounds: Bounds<Pixels>,
2445 text_bounds: Bounds<Pixels>,
2446 layout: &LayoutState,
2447 cx: &mut WindowContext,
2448 ) {
2449 let interactive_bounds = InteractiveBounds {
2450 bounds: bounds.intersect(&cx.content_mask().bounds),
2451 stacking_order: cx.stacking_order().clone(),
2452 };
2453
2454 cx.on_mouse_event({
2455 let position_map = layout.position_map.clone();
2456 let editor = self.editor.clone();
2457 let interactive_bounds = interactive_bounds.clone();
2458
2459 move |event: &ScrollWheelEvent, phase, cx| {
2460 if phase == DispatchPhase::Bubble
2461 && interactive_bounds.visibly_contains(&event.position, cx)
2462 {
2463 editor.update(cx, |editor, cx| {
2464 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2465 });
2466 }
2467 }
2468 });
2469
2470 cx.on_mouse_event({
2471 let position_map = layout.position_map.clone();
2472 let editor = self.editor.clone();
2473 let stacking_order = cx.stacking_order().clone();
2474 let interactive_bounds = interactive_bounds.clone();
2475
2476 move |event: &MouseDownEvent, phase, cx| {
2477 if phase == DispatchPhase::Bubble
2478 && interactive_bounds.visibly_contains(&event.position, cx)
2479 {
2480 match event.button {
2481 MouseButton::Left => editor.update(cx, |editor, cx| {
2482 Self::mouse_left_down(
2483 editor,
2484 event,
2485 &position_map,
2486 text_bounds,
2487 gutter_bounds,
2488 &stacking_order,
2489 cx,
2490 );
2491 }),
2492 MouseButton::Right => editor.update(cx, |editor, cx| {
2493 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2494 }),
2495 _ => {}
2496 };
2497 }
2498 }
2499 });
2500
2501 cx.on_mouse_event({
2502 let position_map = layout.position_map.clone();
2503 let editor = self.editor.clone();
2504 let stacking_order = cx.stacking_order().clone();
2505 let interactive_bounds = interactive_bounds.clone();
2506
2507 move |event: &MouseUpEvent, phase, cx| {
2508 if phase == DispatchPhase::Bubble
2509 && interactive_bounds.visibly_contains(&event.position, cx)
2510 {
2511 editor.update(cx, |editor, cx| {
2512 Self::mouse_up(
2513 editor,
2514 event,
2515 &position_map,
2516 text_bounds,
2517 &stacking_order,
2518 cx,
2519 )
2520 });
2521 }
2522 }
2523 });
2524 cx.on_mouse_event({
2525 let position_map = layout.position_map.clone();
2526 let editor = self.editor.clone();
2527 let stacking_order = cx.stacking_order().clone();
2528
2529 move |event: &MouseMoveEvent, phase, cx| {
2530 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2531
2532 if phase == DispatchPhase::Bubble {
2533 editor.update(cx, |editor, cx| {
2534 if event.pressed_button == Some(MouseButton::Left) {
2535 Self::mouse_dragged(
2536 editor,
2537 event,
2538 &position_map,
2539 text_bounds,
2540 gutter_bounds,
2541 &stacking_order,
2542 cx,
2543 )
2544 }
2545
2546 if interactive_bounds.visibly_contains(&event.position, cx) {
2547 Self::mouse_moved(
2548 editor,
2549 event,
2550 &position_map,
2551 text_bounds,
2552 gutter_bounds,
2553 &stacking_order,
2554 cx,
2555 )
2556 }
2557 });
2558 }
2559 }
2560 });
2561 }
2562}
2563
2564#[derive(Debug)]
2565pub struct LineWithInvisibles {
2566 pub line: ShapedLine,
2567 invisibles: Vec<Invisible>,
2568}
2569
2570impl LineWithInvisibles {
2571 fn from_chunks<'a>(
2572 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2573 text_style: &TextStyle,
2574 max_line_len: usize,
2575 max_line_count: usize,
2576 line_number_layouts: &[Option<ShapedLine>],
2577 editor_mode: EditorMode,
2578 cx: &WindowContext,
2579 ) -> Vec<Self> {
2580 let mut layouts = Vec::with_capacity(max_line_count);
2581 let mut line = String::new();
2582 let mut invisibles = Vec::new();
2583 let mut styles = Vec::new();
2584 let mut non_whitespace_added = false;
2585 let mut row = 0;
2586 let mut line_exceeded_max_len = false;
2587 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2588
2589 for highlighted_chunk in chunks.chain([HighlightedChunk {
2590 chunk: "\n",
2591 style: None,
2592 is_tab: false,
2593 }]) {
2594 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2595 if ix > 0 {
2596 let shaped_line = cx
2597 .text_system()
2598 .shape_line(line.clone().into(), font_size, &styles)
2599 .unwrap();
2600 layouts.push(Self {
2601 line: shaped_line,
2602 invisibles: invisibles.drain(..).collect(),
2603 });
2604
2605 line.clear();
2606 styles.clear();
2607 row += 1;
2608 line_exceeded_max_len = false;
2609 non_whitespace_added = false;
2610 if row == max_line_count {
2611 return layouts;
2612 }
2613 }
2614
2615 if !line_chunk.is_empty() && !line_exceeded_max_len {
2616 let text_style = if let Some(style) = highlighted_chunk.style {
2617 Cow::Owned(text_style.clone().highlight(style))
2618 } else {
2619 Cow::Borrowed(text_style)
2620 };
2621
2622 if line.len() + line_chunk.len() > max_line_len {
2623 let mut chunk_len = max_line_len - line.len();
2624 while !line_chunk.is_char_boundary(chunk_len) {
2625 chunk_len -= 1;
2626 }
2627 line_chunk = &line_chunk[..chunk_len];
2628 line_exceeded_max_len = true;
2629 }
2630
2631 styles.push(TextRun {
2632 len: line_chunk.len(),
2633 font: text_style.font(),
2634 color: text_style.color,
2635 background_color: text_style.background_color,
2636 underline: text_style.underline,
2637 });
2638
2639 if editor_mode == EditorMode::Full {
2640 // Line wrap pads its contents with fake whitespaces,
2641 // avoid printing them
2642 let inside_wrapped_string = line_number_layouts
2643 .get(row)
2644 .and_then(|layout| layout.as_ref())
2645 .is_none();
2646 if highlighted_chunk.is_tab {
2647 if non_whitespace_added || !inside_wrapped_string {
2648 invisibles.push(Invisible::Tab {
2649 line_start_offset: line.len(),
2650 });
2651 }
2652 } else {
2653 invisibles.extend(
2654 line_chunk
2655 .chars()
2656 .enumerate()
2657 .filter(|(_, line_char)| {
2658 let is_whitespace = line_char.is_whitespace();
2659 non_whitespace_added |= !is_whitespace;
2660 is_whitespace
2661 && (non_whitespace_added || !inside_wrapped_string)
2662 })
2663 .map(|(whitespace_index, _)| Invisible::Whitespace {
2664 line_offset: line.len() + whitespace_index,
2665 }),
2666 )
2667 }
2668 }
2669
2670 line.push_str(line_chunk);
2671 }
2672 }
2673 }
2674
2675 layouts
2676 }
2677
2678 fn draw(
2679 &self,
2680 layout: &LayoutState,
2681 row: u32,
2682 content_origin: gpui::Point<Pixels>,
2683 whitespace_setting: ShowWhitespaceSetting,
2684 selection_ranges: &[Range<DisplayPoint>],
2685 cx: &mut WindowContext,
2686 ) {
2687 let line_height = layout.position_map.line_height;
2688 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2689
2690 self.line.paint(
2691 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2692 line_height,
2693 cx,
2694 );
2695
2696 self.draw_invisibles(
2697 &selection_ranges,
2698 layout,
2699 content_origin,
2700 line_y,
2701 row,
2702 line_height,
2703 whitespace_setting,
2704 cx,
2705 );
2706 }
2707
2708 fn draw_invisibles(
2709 &self,
2710 selection_ranges: &[Range<DisplayPoint>],
2711 layout: &LayoutState,
2712 content_origin: gpui::Point<Pixels>,
2713 line_y: Pixels,
2714 row: u32,
2715 line_height: Pixels,
2716 whitespace_setting: ShowWhitespaceSetting,
2717 cx: &mut WindowContext,
2718 ) {
2719 let allowed_invisibles_regions = match whitespace_setting {
2720 ShowWhitespaceSetting::None => return,
2721 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2722 ShowWhitespaceSetting::All => None,
2723 };
2724
2725 for invisible in &self.invisibles {
2726 let (&token_offset, invisible_symbol) = match invisible {
2727 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2728 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2729 };
2730
2731 let x_offset = self.line.x_for_index(token_offset);
2732 let invisible_offset =
2733 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2734 let origin = content_origin
2735 + gpui::point(
2736 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2737 line_y,
2738 );
2739
2740 if let Some(allowed_regions) = allowed_invisibles_regions {
2741 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2742 if !allowed_regions
2743 .iter()
2744 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2745 {
2746 continue;
2747 }
2748 }
2749 invisible_symbol.paint(origin, line_height, cx);
2750 }
2751 }
2752}
2753
2754#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2755enum Invisible {
2756 Tab { line_start_offset: usize },
2757 Whitespace { line_offset: usize },
2758}
2759
2760impl Element for EditorElement {
2761 type State = ();
2762
2763 fn layout(
2764 &mut self,
2765 _element_state: Option<Self::State>,
2766 cx: &mut gpui::WindowContext,
2767 ) -> (gpui::LayoutId, Self::State) {
2768 self.editor.update(cx, |editor, cx| {
2769 editor.set_style(self.style.clone(), cx);
2770
2771 let layout_id = match editor.mode {
2772 EditorMode::SingleLine => {
2773 let rem_size = cx.rem_size();
2774 let mut style = Style::default();
2775 style.size.width = relative(1.).into();
2776 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2777 cx.request_layout(&style, None)
2778 }
2779 EditorMode::AutoHeight { max_lines } => {
2780 let editor_handle = cx.view().clone();
2781 let max_line_number_width =
2782 self.max_line_number_width(&editor.snapshot(cx), cx);
2783 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2784 editor_handle
2785 .update(cx, |editor, cx| {
2786 compute_auto_height_layout(
2787 editor,
2788 max_lines,
2789 max_line_number_width,
2790 known_dimensions,
2791 cx,
2792 )
2793 })
2794 .unwrap_or_default()
2795 })
2796 }
2797 EditorMode::Full => {
2798 let mut style = Style::default();
2799 style.size.width = relative(1.).into();
2800 style.size.height = relative(1.).into();
2801 cx.request_layout(&style, None)
2802 }
2803 };
2804
2805 (layout_id, ())
2806 })
2807 }
2808
2809 fn paint(
2810 &mut self,
2811 bounds: Bounds<gpui::Pixels>,
2812 _element_state: &mut Self::State,
2813 cx: &mut gpui::WindowContext,
2814 ) {
2815 let editor = self.editor.clone();
2816
2817 let mut layout = self.compute_layout(bounds, cx);
2818 let gutter_bounds = Bounds {
2819 origin: bounds.origin,
2820 size: layout.gutter_size,
2821 };
2822 let text_bounds = Bounds {
2823 origin: gutter_bounds.upper_right(),
2824 size: layout.text_size,
2825 };
2826
2827 let focus_handle = editor.focus_handle(cx);
2828 let key_context = self.editor.read(cx).key_context(cx);
2829 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2830 self.register_actions(cx);
2831 self.register_key_listeners(cx);
2832
2833 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2834 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2835 cx.handle_input(&focus_handle, input_handler);
2836
2837 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2838 if layout.gutter_size.width > Pixels::ZERO {
2839 self.paint_gutter(gutter_bounds, &mut layout, cx);
2840 }
2841 self.paint_text(text_bounds, &mut layout, cx);
2842
2843 cx.with_z_index(0, |cx| {
2844 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2845 });
2846 if !layout.blocks.is_empty() {
2847 cx.with_z_index(0, |cx| {
2848 cx.with_element_id(Some("editor_blocks"), |cx| {
2849 self.paint_blocks(bounds, &mut layout, cx);
2850 });
2851 })
2852 }
2853
2854 cx.with_z_index(1, |cx| {
2855 self.paint_overlays(text_bounds, &mut layout, cx);
2856 });
2857
2858 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2859 });
2860 })
2861 }
2862}
2863
2864impl IntoElement for EditorElement {
2865 type Element = Self;
2866
2867 fn element_id(&self) -> Option<gpui::ElementId> {
2868 self.editor.element_id()
2869 }
2870
2871 fn into_element(self) -> Self::Element {
2872 self
2873 }
2874}
2875
2876type BufferRow = u32;
2877
2878pub struct LayoutState {
2879 position_map: Arc<PositionMap>,
2880 gutter_size: Size<Pixels>,
2881 gutter_padding: Pixels,
2882 gutter_margin: Pixels,
2883 text_size: gpui::Size<Pixels>,
2884 mode: EditorMode,
2885 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2886 visible_anchor_range: Range<Anchor>,
2887 visible_display_row_range: Range<u32>,
2888 active_rows: BTreeMap<u32, bool>,
2889 highlighted_rows: Option<Range<u32>>,
2890 line_numbers: Vec<Option<ShapedLine>>,
2891 display_hunks: Vec<DisplayDiffHunk>,
2892 blocks: Vec<BlockLayout>,
2893 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2894 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2895 scrollbar_row_range: Range<f32>,
2896 show_scrollbars: bool,
2897 is_singleton: bool,
2898 max_row: u32,
2899 context_menu: Option<(DisplayPoint, AnyElement)>,
2900 code_actions_indicator: Option<CodeActionsIndicator>,
2901 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2902 fold_indicators: Vec<Option<IconButton>>,
2903 tab_invisible: ShapedLine,
2904 space_invisible: ShapedLine,
2905}
2906
2907struct CodeActionsIndicator {
2908 row: u32,
2909 button: IconButton,
2910}
2911
2912struct PositionMap {
2913 size: Size<Pixels>,
2914 line_height: Pixels,
2915 scroll_position: gpui::Point<Pixels>,
2916 scroll_max: gpui::Point<f32>,
2917 em_width: Pixels,
2918 em_advance: Pixels,
2919 line_layouts: Vec<LineWithInvisibles>,
2920 snapshot: EditorSnapshot,
2921}
2922
2923#[derive(Debug, Copy, Clone)]
2924pub struct PointForPosition {
2925 pub previous_valid: DisplayPoint,
2926 pub next_valid: DisplayPoint,
2927 pub exact_unclipped: DisplayPoint,
2928 pub column_overshoot_after_line_end: u32,
2929}
2930
2931impl PointForPosition {
2932 #[cfg(test)]
2933 pub fn valid(valid: DisplayPoint) -> Self {
2934 Self {
2935 previous_valid: valid,
2936 next_valid: valid,
2937 exact_unclipped: valid,
2938 column_overshoot_after_line_end: 0,
2939 }
2940 }
2941
2942 pub fn as_valid(&self) -> Option<DisplayPoint> {
2943 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2944 Some(self.previous_valid)
2945 } else {
2946 None
2947 }
2948 }
2949}
2950
2951impl PositionMap {
2952 fn point_for_position(
2953 &self,
2954 text_bounds: Bounds<Pixels>,
2955 position: gpui::Point<Pixels>,
2956 ) -> PointForPosition {
2957 let scroll_position = self.snapshot.scroll_position();
2958 let position = position - text_bounds.origin;
2959 let y = position.y.max(px(0.)).min(self.size.height);
2960 let x = position.x + (scroll_position.x * self.em_width);
2961 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2962
2963 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2964 .line_layouts
2965 .get(row as usize - scroll_position.y as usize)
2966 .map(|&LineWithInvisibles { ref line, .. }| line)
2967 {
2968 if let Some(ix) = line.index_for_x(x) {
2969 (ix as u32, px(0.))
2970 } else {
2971 (line.len as u32, px(0.).max(x - line.width))
2972 }
2973 } else {
2974 (0, x)
2975 };
2976
2977 let mut exact_unclipped = DisplayPoint::new(row, column);
2978 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2979 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2980
2981 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2982 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2983 PointForPosition {
2984 previous_valid,
2985 next_valid,
2986 exact_unclipped,
2987 column_overshoot_after_line_end,
2988 }
2989 }
2990}
2991
2992struct BlockLayout {
2993 row: u32,
2994 element: AnyElement,
2995 available_space: Size<AvailableSpace>,
2996 style: BlockStyle,
2997}
2998
2999fn layout_line(
3000 row: u32,
3001 snapshot: &EditorSnapshot,
3002 style: &EditorStyle,
3003 cx: &WindowContext,
3004) -> Result<ShapedLine> {
3005 let mut line = snapshot.line(row);
3006
3007 if line.len() > MAX_LINE_LEN {
3008 let mut len = MAX_LINE_LEN;
3009 while !line.is_char_boundary(len) {
3010 len -= 1;
3011 }
3012
3013 line.truncate(len);
3014 }
3015
3016 cx.text_system().shape_line(
3017 line.into(),
3018 style.text.font_size.to_pixels(cx.rem_size()),
3019 &[TextRun {
3020 len: snapshot.line_len(row) as usize,
3021 font: style.text.font(),
3022 color: Hsla::default(),
3023 background_color: None,
3024 underline: None,
3025 }],
3026 )
3027}
3028
3029#[derive(Debug)]
3030pub struct Cursor {
3031 origin: gpui::Point<Pixels>,
3032 block_width: Pixels,
3033 line_height: Pixels,
3034 color: Hsla,
3035 shape: CursorShape,
3036 block_text: Option<ShapedLine>,
3037}
3038
3039impl Cursor {
3040 pub fn new(
3041 origin: gpui::Point<Pixels>,
3042 block_width: Pixels,
3043 line_height: Pixels,
3044 color: Hsla,
3045 shape: CursorShape,
3046 block_text: Option<ShapedLine>,
3047 ) -> Cursor {
3048 Cursor {
3049 origin,
3050 block_width,
3051 line_height,
3052 color,
3053 shape,
3054 block_text,
3055 }
3056 }
3057
3058 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3059 Bounds {
3060 origin: self.origin + origin,
3061 size: size(self.block_width, self.line_height),
3062 }
3063 }
3064
3065 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3066 let bounds = match self.shape {
3067 CursorShape::Bar => Bounds {
3068 origin: self.origin + origin,
3069 size: size(px(2.0), self.line_height),
3070 },
3071 CursorShape::Block | CursorShape::Hollow => Bounds {
3072 origin: self.origin + origin,
3073 size: size(self.block_width, self.line_height),
3074 },
3075 CursorShape::Underscore => Bounds {
3076 origin: self.origin
3077 + origin
3078 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3079 size: size(self.block_width, px(2.0)),
3080 },
3081 };
3082
3083 //Draw background or border quad
3084 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3085 outline(bounds, self.color)
3086 } else {
3087 fill(bounds, self.color)
3088 };
3089
3090 cx.paint_quad(cursor);
3091
3092 if let Some(block_text) = &self.block_text {
3093 block_text.paint(self.origin + origin, self.line_height, cx);
3094 }
3095 }
3096
3097 pub fn shape(&self) -> CursorShape {
3098 self.shape
3099 }
3100}
3101
3102#[derive(Debug)]
3103pub struct HighlightedRange {
3104 pub start_y: Pixels,
3105 pub line_height: Pixels,
3106 pub lines: Vec<HighlightedRangeLine>,
3107 pub color: Hsla,
3108 pub corner_radius: Pixels,
3109}
3110
3111#[derive(Debug)]
3112pub struct HighlightedRangeLine {
3113 pub start_x: Pixels,
3114 pub end_x: Pixels,
3115}
3116
3117impl HighlightedRange {
3118 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3119 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3120 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3121 self.paint_lines(
3122 self.start_y + self.line_height,
3123 &self.lines[1..],
3124 bounds,
3125 cx,
3126 );
3127 } else {
3128 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3129 }
3130 }
3131
3132 fn paint_lines(
3133 &self,
3134 start_y: Pixels,
3135 lines: &[HighlightedRangeLine],
3136 _bounds: Bounds<Pixels>,
3137 cx: &mut WindowContext,
3138 ) {
3139 if lines.is_empty() {
3140 return;
3141 }
3142
3143 let first_line = lines.first().unwrap();
3144 let last_line = lines.last().unwrap();
3145
3146 let first_top_left = point(first_line.start_x, start_y);
3147 let first_top_right = point(first_line.end_x, start_y);
3148
3149 let curve_height = point(Pixels::ZERO, self.corner_radius);
3150 let curve_width = |start_x: Pixels, end_x: Pixels| {
3151 let max = (end_x - start_x) / 2.;
3152 let width = if max < self.corner_radius {
3153 max
3154 } else {
3155 self.corner_radius
3156 };
3157
3158 point(width, Pixels::ZERO)
3159 };
3160
3161 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3162 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3163 path.curve_to(first_top_right + curve_height, first_top_right);
3164
3165 let mut iter = lines.iter().enumerate().peekable();
3166 while let Some((ix, line)) = iter.next() {
3167 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3168
3169 if let Some((_, next_line)) = iter.peek() {
3170 let next_top_right = point(next_line.end_x, bottom_right.y);
3171
3172 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3173 Ordering::Equal => {
3174 path.line_to(bottom_right);
3175 }
3176 Ordering::Less => {
3177 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3178 path.line_to(bottom_right - curve_height);
3179 if self.corner_radius > Pixels::ZERO {
3180 path.curve_to(bottom_right - curve_width, bottom_right);
3181 }
3182 path.line_to(next_top_right + curve_width);
3183 if self.corner_radius > Pixels::ZERO {
3184 path.curve_to(next_top_right + curve_height, next_top_right);
3185 }
3186 }
3187 Ordering::Greater => {
3188 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3189 path.line_to(bottom_right - curve_height);
3190 if self.corner_radius > Pixels::ZERO {
3191 path.curve_to(bottom_right + curve_width, bottom_right);
3192 }
3193 path.line_to(next_top_right - curve_width);
3194 if self.corner_radius > Pixels::ZERO {
3195 path.curve_to(next_top_right + curve_height, next_top_right);
3196 }
3197 }
3198 }
3199 } else {
3200 let curve_width = curve_width(line.start_x, line.end_x);
3201 path.line_to(bottom_right - curve_height);
3202 if self.corner_radius > Pixels::ZERO {
3203 path.curve_to(bottom_right - curve_width, bottom_right);
3204 }
3205
3206 let bottom_left = point(line.start_x, bottom_right.y);
3207 path.line_to(bottom_left + curve_width);
3208 if self.corner_radius > Pixels::ZERO {
3209 path.curve_to(bottom_left - curve_height, bottom_left);
3210 }
3211 }
3212 }
3213
3214 if first_line.start_x > last_line.start_x {
3215 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3216 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3217 path.line_to(second_top_left + curve_height);
3218 if self.corner_radius > Pixels::ZERO {
3219 path.curve_to(second_top_left + curve_width, second_top_left);
3220 }
3221 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3222 path.line_to(first_bottom_left - curve_width);
3223 if self.corner_radius > Pixels::ZERO {
3224 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3225 }
3226 }
3227
3228 path.line_to(first_top_left + curve_height);
3229 if self.corner_radius > Pixels::ZERO {
3230 path.curve_to(first_top_left + top_curve_width, first_top_left);
3231 }
3232 path.line_to(first_top_right - top_curve_width);
3233
3234 cx.paint_path(path, self.color);
3235 }
3236}
3237
3238pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3239 (delta.pow(1.5) / 100.0).into()
3240}
3241
3242fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3243 (delta.pow(1.2) / 300.0).into()
3244}
3245
3246#[cfg(test)]
3247mod tests {
3248 use super::*;
3249 use crate::{
3250 display_map::{BlockDisposition, BlockProperties},
3251 editor_tests::{init_test, update_test_language_settings},
3252 Editor, MultiBuffer,
3253 };
3254 use gpui::{EmptyView, TestAppContext};
3255 use language::language_settings;
3256 use log::info;
3257 use std::{num::NonZeroU32, sync::Arc};
3258 use util::test::sample_text;
3259
3260 #[gpui::test]
3261 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3262 init_test(cx, |_| {});
3263 let window = cx.add_window(|cx| {
3264 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3265 Editor::new(EditorMode::Full, buffer, None, cx)
3266 });
3267
3268 let editor = window.root(cx).unwrap();
3269 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3270 let element = EditorElement::new(&editor, style);
3271
3272 let layouts = window
3273 .update(cx, |editor, cx| {
3274 let snapshot = editor.snapshot(cx);
3275 element
3276 .shape_line_numbers(
3277 0..6,
3278 &Default::default(),
3279 DisplayPoint::new(0, 0),
3280 false,
3281 &snapshot,
3282 cx,
3283 )
3284 .0
3285 })
3286 .unwrap();
3287 assert_eq!(layouts.len(), 6);
3288
3289 let relative_rows = window
3290 .update(cx, |editor, cx| {
3291 let snapshot = editor.snapshot(cx);
3292 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3293 })
3294 .unwrap();
3295 assert_eq!(relative_rows[&0], 3);
3296 assert_eq!(relative_rows[&1], 2);
3297 assert_eq!(relative_rows[&2], 1);
3298 // current line has no relative number
3299 assert_eq!(relative_rows[&4], 1);
3300 assert_eq!(relative_rows[&5], 2);
3301
3302 // works if cursor is before screen
3303 let relative_rows = window
3304 .update(cx, |editor, cx| {
3305 let snapshot = editor.snapshot(cx);
3306
3307 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3308 })
3309 .unwrap();
3310 assert_eq!(relative_rows.len(), 3);
3311 assert_eq!(relative_rows[&3], 2);
3312 assert_eq!(relative_rows[&4], 3);
3313 assert_eq!(relative_rows[&5], 4);
3314
3315 // works if cursor is after screen
3316 let relative_rows = window
3317 .update(cx, |editor, cx| {
3318 let snapshot = editor.snapshot(cx);
3319
3320 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3321 })
3322 .unwrap();
3323 assert_eq!(relative_rows.len(), 3);
3324 assert_eq!(relative_rows[&0], 5);
3325 assert_eq!(relative_rows[&1], 4);
3326 assert_eq!(relative_rows[&2], 3);
3327 }
3328
3329 #[gpui::test]
3330 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3331 init_test(cx, |_| {});
3332
3333 let window = cx.add_window(|cx| {
3334 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3335 Editor::new(EditorMode::Full, buffer, None, cx)
3336 });
3337 let editor = window.root(cx).unwrap();
3338 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3339 let mut element = EditorElement::new(&editor, style);
3340
3341 window
3342 .update(cx, |editor, cx| {
3343 editor.cursor_shape = CursorShape::Block;
3344 editor.change_selections(None, cx, |s| {
3345 s.select_ranges([
3346 Point::new(0, 0)..Point::new(1, 0),
3347 Point::new(3, 2)..Point::new(3, 3),
3348 Point::new(5, 6)..Point::new(6, 0),
3349 ]);
3350 });
3351 })
3352 .unwrap();
3353 let state = cx
3354 .update_window(window.into(), |_, cx| {
3355 element.compute_layout(
3356 Bounds {
3357 origin: point(px(500.), px(500.)),
3358 size: size(px(500.), px(500.)),
3359 },
3360 cx,
3361 )
3362 })
3363 .unwrap();
3364
3365 assert_eq!(state.selections.len(), 1);
3366 let local_selections = &state.selections[0].1;
3367 assert_eq!(local_selections.len(), 3);
3368 // moves cursor back one line
3369 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3370 assert_eq!(
3371 local_selections[0].range,
3372 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3373 );
3374
3375 // moves cursor back one column
3376 assert_eq!(
3377 local_selections[1].range,
3378 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3379 );
3380 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3381
3382 // leaves cursor on the max point
3383 assert_eq!(
3384 local_selections[2].range,
3385 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3386 );
3387 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3388
3389 // active lines does not include 1 (even though the range of the selection does)
3390 assert_eq!(
3391 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3392 vec![0, 3, 5, 6]
3393 );
3394
3395 // multi-buffer support
3396 // in DisplayPoint co-ordinates, this is what we're dealing with:
3397 // 0: [[file
3398 // 1: header]]
3399 // 2: aaaaaa
3400 // 3: bbbbbb
3401 // 4: cccccc
3402 // 5:
3403 // 6: ...
3404 // 7: ffffff
3405 // 8: gggggg
3406 // 9: hhhhhh
3407 // 10:
3408 // 11: [[file
3409 // 12: header]]
3410 // 13: bbbbbb
3411 // 14: cccccc
3412 // 15: dddddd
3413 let window = cx.add_window(|cx| {
3414 let buffer = MultiBuffer::build_multi(
3415 [
3416 (
3417 &(sample_text(8, 6, 'a') + "\n"),
3418 vec![
3419 Point::new(0, 0)..Point::new(3, 0),
3420 Point::new(4, 0)..Point::new(7, 0),
3421 ],
3422 ),
3423 (
3424 &(sample_text(8, 6, 'a') + "\n"),
3425 vec![Point::new(1, 0)..Point::new(3, 0)],
3426 ),
3427 ],
3428 cx,
3429 );
3430 Editor::new(EditorMode::Full, buffer, None, cx)
3431 });
3432 let editor = window.root(cx).unwrap();
3433 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3434 let mut element = EditorElement::new(&editor, style);
3435 let state = window.update(cx, |editor, cx| {
3436 editor.cursor_shape = CursorShape::Block;
3437 editor.change_selections(None, cx, |s| {
3438 s.select_display_ranges([
3439 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3440 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3441 ]);
3442 });
3443 });
3444
3445 let state = cx
3446 .update_window(window.into(), |_, cx| {
3447 element.compute_layout(
3448 Bounds {
3449 origin: point(px(500.), px(500.)),
3450 size: size(px(500.), px(500.)),
3451 },
3452 cx,
3453 )
3454 })
3455 .unwrap();
3456 assert_eq!(state.selections.len(), 1);
3457 let local_selections = &state.selections[0].1;
3458 assert_eq!(local_selections.len(), 2);
3459
3460 // moves cursor on excerpt boundary back a line
3461 // and doesn't allow selection to bleed through
3462 assert_eq!(
3463 local_selections[0].range,
3464 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3465 );
3466 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3467 // moves cursor on buffer boundary back two lines
3468 // and doesn't allow selection to bleed through
3469 assert_eq!(
3470 local_selections[1].range,
3471 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3472 );
3473 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3474 }
3475
3476 #[gpui::test]
3477 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3478 init_test(cx, |_| {});
3479
3480 let window = cx.add_window(|cx| {
3481 let buffer = MultiBuffer::build_simple("", cx);
3482 Editor::new(EditorMode::Full, buffer, None, cx)
3483 });
3484 let editor = window.root(cx).unwrap();
3485 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3486 window
3487 .update(cx, |editor, cx| {
3488 editor.set_placeholder_text("hello", cx);
3489 editor.insert_blocks(
3490 [BlockProperties {
3491 style: BlockStyle::Fixed,
3492 disposition: BlockDisposition::Above,
3493 height: 3,
3494 position: Anchor::min(),
3495 render: Arc::new(|_| div().into_any()),
3496 }],
3497 None,
3498 cx,
3499 );
3500
3501 // Blur the editor so that it displays placeholder text.
3502 cx.blur();
3503 })
3504 .unwrap();
3505
3506 let mut element = EditorElement::new(&editor, style);
3507 let mut state = cx
3508 .update_window(window.into(), |_, cx| {
3509 element.compute_layout(
3510 Bounds {
3511 origin: point(px(500.), px(500.)),
3512 size: size(px(500.), px(500.)),
3513 },
3514 cx,
3515 )
3516 })
3517 .unwrap();
3518 let size = state.position_map.size;
3519
3520 assert_eq!(state.position_map.line_layouts.len(), 4);
3521 assert_eq!(
3522 state
3523 .line_numbers
3524 .iter()
3525 .map(Option::is_some)
3526 .collect::<Vec<_>>(),
3527 &[false, false, false, true]
3528 );
3529
3530 // Don't panic.
3531 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3532 cx.update_window(window.into(), |_, cx| {
3533 element.paint(bounds, &mut (), cx);
3534 })
3535 .unwrap()
3536 }
3537
3538 #[gpui::test]
3539 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3540 const TAB_SIZE: u32 = 4;
3541
3542 let input_text = "\t \t|\t| a b";
3543 let expected_invisibles = vec![
3544 Invisible::Tab {
3545 line_start_offset: 0,
3546 },
3547 Invisible::Whitespace {
3548 line_offset: TAB_SIZE as usize,
3549 },
3550 Invisible::Tab {
3551 line_start_offset: TAB_SIZE as usize + 1,
3552 },
3553 Invisible::Tab {
3554 line_start_offset: TAB_SIZE as usize * 2 + 1,
3555 },
3556 Invisible::Whitespace {
3557 line_offset: TAB_SIZE as usize * 3 + 1,
3558 },
3559 Invisible::Whitespace {
3560 line_offset: TAB_SIZE as usize * 3 + 3,
3561 },
3562 ];
3563 assert_eq!(
3564 expected_invisibles.len(),
3565 input_text
3566 .chars()
3567 .filter(|initial_char| initial_char.is_whitespace())
3568 .count(),
3569 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3570 );
3571
3572 init_test(cx, |s| {
3573 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3574 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3575 });
3576
3577 let actual_invisibles =
3578 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3579
3580 assert_eq!(expected_invisibles, actual_invisibles);
3581 }
3582
3583 #[gpui::test]
3584 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3585 init_test(cx, |s| {
3586 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3587 s.defaults.tab_size = NonZeroU32::new(4);
3588 });
3589
3590 for editor_mode_without_invisibles in [
3591 EditorMode::SingleLine,
3592 EditorMode::AutoHeight { max_lines: 100 },
3593 ] {
3594 let invisibles = collect_invisibles_from_new_editor(
3595 cx,
3596 editor_mode_without_invisibles,
3597 "\t\t\t| | a b",
3598 px(500.0),
3599 );
3600 assert!(invisibles.is_empty(),
3601 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3602 }
3603 }
3604
3605 #[gpui::test]
3606 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3607 let tab_size = 4;
3608 let input_text = "a\tbcd ".repeat(9);
3609 let repeated_invisibles = [
3610 Invisible::Tab {
3611 line_start_offset: 1,
3612 },
3613 Invisible::Whitespace {
3614 line_offset: tab_size as usize + 3,
3615 },
3616 Invisible::Whitespace {
3617 line_offset: tab_size as usize + 4,
3618 },
3619 Invisible::Whitespace {
3620 line_offset: tab_size as usize + 5,
3621 },
3622 ];
3623 let expected_invisibles = std::iter::once(repeated_invisibles)
3624 .cycle()
3625 .take(9)
3626 .flatten()
3627 .collect::<Vec<_>>();
3628 assert_eq!(
3629 expected_invisibles.len(),
3630 input_text
3631 .chars()
3632 .filter(|initial_char| initial_char.is_whitespace())
3633 .count(),
3634 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3635 );
3636 info!("Expected invisibles: {expected_invisibles:?}");
3637
3638 init_test(cx, |_| {});
3639
3640 // Put the same string with repeating whitespace pattern into editors of various size,
3641 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3642 let resize_step = 10.0;
3643 let mut editor_width = 200.0;
3644 while editor_width <= 1000.0 {
3645 update_test_language_settings(cx, |s| {
3646 s.defaults.tab_size = NonZeroU32::new(tab_size);
3647 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3648 s.defaults.preferred_line_length = Some(editor_width as u32);
3649 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3650 });
3651
3652 let actual_invisibles = collect_invisibles_from_new_editor(
3653 cx,
3654 EditorMode::Full,
3655 &input_text,
3656 px(editor_width),
3657 );
3658
3659 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3660 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3661 let mut i = 0;
3662 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3663 i = actual_index;
3664 match expected_invisibles.get(i) {
3665 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3666 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3667 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3668 _ => {
3669 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3670 }
3671 },
3672 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3673 }
3674 }
3675 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3676 assert!(
3677 missing_expected_invisibles.is_empty(),
3678 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3679 );
3680
3681 editor_width += resize_step;
3682 }
3683 }
3684
3685 fn collect_invisibles_from_new_editor(
3686 cx: &mut TestAppContext,
3687 editor_mode: EditorMode,
3688 input_text: &str,
3689 editor_width: Pixels,
3690 ) -> Vec<Invisible> {
3691 info!(
3692 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3693 editor_width.0
3694 );
3695 let window = cx.add_window(|cx| {
3696 let buffer = MultiBuffer::build_simple(&input_text, cx);
3697 Editor::new(editor_mode, buffer, None, cx)
3698 });
3699 let editor = window.root(cx).unwrap();
3700 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3701 let mut element = EditorElement::new(&editor, style);
3702 window
3703 .update(cx, |editor, cx| {
3704 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3705 editor.set_wrap_width(Some(editor_width), cx);
3706 })
3707 .unwrap();
3708 let layout_state = cx
3709 .update_window(window.into(), |_, cx| {
3710 element.compute_layout(
3711 Bounds {
3712 origin: point(px(500.), px(500.)),
3713 size: size(px(500.), px(500.)),
3714 },
3715 cx,
3716 )
3717 })
3718 .unwrap();
3719
3720 layout_state
3721 .position_map
3722 .line_layouts
3723 .iter()
3724 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3725 .flatten()
3726 .cloned()
3727 .collect()
3728 }
3729}
3730
3731pub fn register_action<T: Action>(
3732 view: &View<Editor>,
3733 cx: &mut WindowContext,
3734 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3735) {
3736 let view = view.clone();
3737 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3738 let action = action.downcast_ref().unwrap();
3739 if phase == DispatchPhase::Bubble {
3740 view.update(cx, |editor, cx| {
3741 listener(editor, action, cx);
3742 })
3743 }
3744 })
3745}
3746
3747fn compute_auto_height_layout(
3748 editor: &mut Editor,
3749 max_lines: usize,
3750 max_line_number_width: Pixels,
3751 known_dimensions: Size<Option<Pixels>>,
3752 cx: &mut ViewContext<Editor>,
3753) -> Option<Size<Pixels>> {
3754 let width = known_dimensions.width?;
3755 if let Some(height) = known_dimensions.height {
3756 return Some(size(width, height));
3757 }
3758
3759 let style = editor.style.as_ref().unwrap();
3760 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3761 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3762 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3763 let em_width = cx
3764 .text_system()
3765 .typographic_bounds(font_id, font_size, 'm')
3766 .unwrap()
3767 .size
3768 .width;
3769
3770 let mut snapshot = editor.snapshot(cx);
3771 let gutter_padding;
3772 let gutter_width;
3773 let gutter_margin;
3774 if snapshot.show_gutter {
3775 let descent = cx.text_system().descent(font_id, font_size);
3776 let gutter_padding_factor = 3.5;
3777 gutter_padding = (em_width * gutter_padding_factor).round();
3778 gutter_width = max_line_number_width + gutter_padding * 2.0;
3779 gutter_margin = -descent;
3780 } else {
3781 gutter_padding = Pixels::ZERO;
3782 gutter_width = Pixels::ZERO;
3783 gutter_margin = Pixels::ZERO;
3784 };
3785
3786 editor.gutter_width = gutter_width;
3787 let text_width = width - gutter_width;
3788 let overscroll = size(em_width, px(0.));
3789
3790 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3791 if editor.set_wrap_width(Some(editor_width), cx) {
3792 snapshot = editor.snapshot(cx);
3793 }
3794
3795 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3796 let height = scroll_height
3797 .max(line_height)
3798 .min(line_height * max_lines as f32);
3799
3800 Some(size(width, height))
3801}