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, OpenExcerpts, PageDown, PageUp, Point, SelectPhase,
20 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, AvailableSpace, BorrowWindow, Bounds, ContentMask, Corners,
28 CursorStyle, DispatchPhase, Edges, Element, ElementInputHandler, Hsla, InteractiveBounds,
29 InteractiveElement, IntoElement, ModifiersChangedEvent, MouseButton, MouseDownEvent,
30 MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, ScrollWheelEvent, ShapedLine,
31 SharedString, Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun,
32 TextStyle, View, ViewContext, WindowContext,
33};
34use itertools::Itertools;
35use language::language_settings::ShowWhitespaceSetting;
36use multi_buffer::Anchor;
37use project::{
38 project_settings::{GitGutterSetting, ProjectSettings},
39 ProjectPath,
40};
41use settings::Settings;
42use smallvec::SmallVec;
43use std::{
44 any::TypeId,
45 borrow::Cow,
46 cmp::{self, Ordering},
47 fmt::Write,
48 iter,
49 ops::Range,
50 sync::Arc,
51};
52use sum_tree::Bias;
53use theme::{ActiveTheme, PlayerColor};
54use ui::prelude::*;
55use ui::{h_stack, ButtonLike, ButtonStyle, IconButton, Tooltip};
56use util::ResultExt;
57use workspace::item::Item;
58
59struct SelectionLayout {
60 head: DisplayPoint,
61 cursor_shape: CursorShape,
62 is_newest: bool,
63 is_local: bool,
64 range: Range<DisplayPoint>,
65 active_rows: Range<u32>,
66}
67
68impl SelectionLayout {
69 fn new<T: ToPoint + ToDisplayPoint + Clone>(
70 selection: Selection<T>,
71 line_mode: bool,
72 cursor_shape: CursorShape,
73 map: &DisplaySnapshot,
74 is_newest: bool,
75 is_local: bool,
76 ) -> Self {
77 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
78 let display_selection = point_selection.map(|p| p.to_display_point(map));
79 let mut range = display_selection.range();
80 let mut head = display_selection.head();
81 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
82 ..map.next_line_boundary(point_selection.end).1.row();
83
84 // vim visual line mode
85 if line_mode {
86 let point_range = map.expand_to_line(point_selection.range());
87 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
88 }
89
90 // any vim visual mode (including line mode)
91 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
92 if head.column() > 0 {
93 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
94 } else if head.row() > 0 && head != map.max_point() {
95 head = map.clip_point(
96 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
97 Bias::Left,
98 );
99 // updating range.end is a no-op unless you're cursor is
100 // on the newline containing a multi-buffer divider
101 // in which case the clip_point may have moved the head up
102 // an additional row.
103 range.end = DisplayPoint::new(head.row() + 1, 0);
104 active_rows.end = head.row();
105 }
106 }
107
108 Self {
109 head,
110 cursor_shape,
111 is_newest,
112 is_local,
113 range,
114 active_rows,
115 }
116 }
117}
118
119pub struct EditorElement {
120 editor: View<Editor>,
121 style: EditorStyle,
122}
123
124impl EditorElement {
125 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
126 Self {
127 editor: editor.clone(),
128 style,
129 }
130 }
131
132 fn register_actions(&self, cx: &mut WindowContext) {
133 let view = &self.editor;
134 view.update(cx, |editor, cx| {
135 for action in editor.editor_actions.iter() {
136 (action)(cx)
137 }
138 });
139
140 crate::rust_analyzer_ext::apply_related_actions(view, cx);
141 register_action(view, cx, Editor::move_left);
142 register_action(view, cx, Editor::move_right);
143 register_action(view, cx, Editor::move_down);
144 register_action(view, cx, Editor::move_up);
145 register_action(view, cx, Editor::cancel);
146 register_action(view, cx, Editor::newline);
147 register_action(view, cx, Editor::newline_above);
148 register_action(view, cx, Editor::newline_below);
149 register_action(view, cx, Editor::backspace);
150 register_action(view, cx, Editor::delete);
151 register_action(view, cx, Editor::tab);
152 register_action(view, cx, Editor::tab_prev);
153 register_action(view, cx, Editor::indent);
154 register_action(view, cx, Editor::outdent);
155 register_action(view, cx, Editor::delete_line);
156 register_action(view, cx, Editor::join_lines);
157 register_action(view, cx, Editor::sort_lines_case_sensitive);
158 register_action(view, cx, Editor::sort_lines_case_insensitive);
159 register_action(view, cx, Editor::reverse_lines);
160 register_action(view, cx, Editor::shuffle_lines);
161 register_action(view, cx, Editor::convert_to_upper_case);
162 register_action(view, cx, Editor::convert_to_lower_case);
163 register_action(view, cx, Editor::convert_to_title_case);
164 register_action(view, cx, Editor::convert_to_snake_case);
165 register_action(view, cx, Editor::convert_to_kebab_case);
166 register_action(view, cx, Editor::convert_to_upper_camel_case);
167 register_action(view, cx, Editor::convert_to_lower_camel_case);
168 register_action(view, cx, Editor::delete_to_previous_word_start);
169 register_action(view, cx, Editor::delete_to_previous_subword_start);
170 register_action(view, cx, Editor::delete_to_next_word_end);
171 register_action(view, cx, Editor::delete_to_next_subword_end);
172 register_action(view, cx, Editor::delete_to_beginning_of_line);
173 register_action(view, cx, Editor::delete_to_end_of_line);
174 register_action(view, cx, Editor::cut_to_end_of_line);
175 register_action(view, cx, Editor::duplicate_line);
176 register_action(view, cx, Editor::move_line_up);
177 register_action(view, cx, Editor::move_line_down);
178 register_action(view, cx, Editor::transpose);
179 register_action(view, cx, Editor::cut);
180 register_action(view, cx, Editor::copy);
181 register_action(view, cx, Editor::paste);
182 register_action(view, cx, Editor::undo);
183 register_action(view, cx, Editor::redo);
184 register_action(view, cx, Editor::move_page_up);
185 register_action(view, cx, Editor::move_page_down);
186 register_action(view, cx, Editor::next_screen);
187 register_action(view, cx, Editor::scroll_cursor_top);
188 register_action(view, cx, Editor::scroll_cursor_center);
189 register_action(view, cx, Editor::scroll_cursor_bottom);
190 register_action(view, cx, |editor, _: &LineDown, cx| {
191 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
192 });
193 register_action(view, cx, |editor, _: &LineUp, cx| {
194 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
195 });
196 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
197 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
198 });
199 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
200 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
201 });
202 register_action(view, cx, |editor, _: &PageDown, cx| {
203 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
204 });
205 register_action(view, cx, |editor, _: &PageUp, cx| {
206 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
207 });
208 register_action(view, cx, Editor::move_to_previous_word_start);
209 register_action(view, cx, Editor::move_to_previous_subword_start);
210 register_action(view, cx, Editor::move_to_next_word_end);
211 register_action(view, cx, Editor::move_to_next_subword_end);
212 register_action(view, cx, Editor::move_to_beginning_of_line);
213 register_action(view, cx, Editor::move_to_end_of_line);
214 register_action(view, cx, Editor::move_to_start_of_paragraph);
215 register_action(view, cx, Editor::move_to_end_of_paragraph);
216 register_action(view, cx, Editor::move_to_beginning);
217 register_action(view, cx, Editor::move_to_end);
218 register_action(view, cx, Editor::select_up);
219 register_action(view, cx, Editor::select_down);
220 register_action(view, cx, Editor::select_left);
221 register_action(view, cx, Editor::select_right);
222 register_action(view, cx, Editor::select_to_previous_word_start);
223 register_action(view, cx, Editor::select_to_previous_subword_start);
224 register_action(view, cx, Editor::select_to_next_word_end);
225 register_action(view, cx, Editor::select_to_next_subword_end);
226 register_action(view, cx, Editor::select_to_beginning_of_line);
227 register_action(view, cx, Editor::select_to_end_of_line);
228 register_action(view, cx, Editor::select_to_start_of_paragraph);
229 register_action(view, cx, Editor::select_to_end_of_paragraph);
230 register_action(view, cx, Editor::select_to_beginning);
231 register_action(view, cx, Editor::select_to_end);
232 register_action(view, cx, Editor::select_all);
233 register_action(view, cx, |editor, action, cx| {
234 editor.select_all_matches(action, cx).log_err();
235 });
236 register_action(view, cx, Editor::select_line);
237 register_action(view, cx, Editor::split_selection_into_lines);
238 register_action(view, cx, Editor::add_selection_above);
239 register_action(view, cx, Editor::add_selection_below);
240 register_action(view, cx, |editor, action, cx| {
241 editor.select_next(action, cx).log_err();
242 });
243 register_action(view, cx, |editor, action, cx| {
244 editor.select_previous(action, cx).log_err();
245 });
246 register_action(view, cx, Editor::toggle_comments);
247 register_action(view, cx, Editor::select_larger_syntax_node);
248 register_action(view, cx, Editor::select_smaller_syntax_node);
249 register_action(view, cx, Editor::move_to_enclosing_bracket);
250 register_action(view, cx, Editor::undo_selection);
251 register_action(view, cx, Editor::redo_selection);
252 register_action(view, cx, Editor::go_to_diagnostic);
253 register_action(view, cx, Editor::go_to_prev_diagnostic);
254 register_action(view, cx, Editor::go_to_hunk);
255 register_action(view, cx, Editor::go_to_prev_hunk);
256 register_action(view, cx, Editor::go_to_definition);
257 register_action(view, cx, Editor::go_to_definition_split);
258 register_action(view, cx, Editor::go_to_type_definition);
259 register_action(view, cx, Editor::go_to_type_definition_split);
260 register_action(view, cx, Editor::fold);
261 register_action(view, cx, Editor::fold_at);
262 register_action(view, cx, Editor::unfold_lines);
263 register_action(view, cx, Editor::unfold_at);
264 register_action(view, cx, Editor::fold_selected_ranges);
265 register_action(view, cx, Editor::show_completions);
266 register_action(view, cx, Editor::toggle_code_actions);
267 register_action(view, cx, Editor::open_excerpts);
268 register_action(view, cx, Editor::toggle_soft_wrap);
269 register_action(view, cx, Editor::toggle_inlay_hints);
270 register_action(view, cx, hover_popover::hover);
271 register_action(view, cx, Editor::reveal_in_finder);
272 register_action(view, cx, Editor::copy_path);
273 register_action(view, cx, Editor::copy_relative_path);
274 register_action(view, cx, Editor::copy_highlight_json);
275 register_action(view, cx, |editor, action, cx| {
276 if let Some(task) = editor.format(action, cx) {
277 task.detach_and_log_err(cx);
278 } else {
279 cx.propagate();
280 }
281 });
282 register_action(view, cx, Editor::restart_language_server);
283 register_action(view, cx, Editor::show_character_palette);
284 register_action(view, cx, |editor, action, cx| {
285 if let Some(task) = editor.confirm_completion(action, cx) {
286 task.detach_and_log_err(cx);
287 } else {
288 cx.propagate();
289 }
290 });
291 register_action(view, cx, |editor, action, cx| {
292 if let Some(task) = editor.confirm_code_action(action, cx) {
293 task.detach_and_log_err(cx);
294 } else {
295 cx.propagate();
296 }
297 });
298 register_action(view, cx, |editor, action, cx| {
299 if let Some(task) = editor.rename(action, cx) {
300 task.detach_and_log_err(cx);
301 } else {
302 cx.propagate();
303 }
304 });
305 register_action(view, cx, |editor, action, cx| {
306 if let Some(task) = editor.confirm_rename(action, cx) {
307 task.detach_and_log_err(cx);
308 } else {
309 cx.propagate();
310 }
311 });
312 register_action(view, cx, |editor, action, cx| {
313 if let Some(task) = editor.find_all_references(action, cx) {
314 task.detach_and_log_err(cx);
315 } else {
316 cx.propagate();
317 }
318 });
319 register_action(view, cx, Editor::next_copilot_suggestion);
320 register_action(view, cx, Editor::previous_copilot_suggestion);
321 register_action(view, cx, Editor::copilot_suggest);
322 register_action(view, cx, Editor::context_menu_first);
323 register_action(view, cx, Editor::context_menu_prev);
324 register_action(view, cx, Editor::context_menu_next);
325 register_action(view, cx, Editor::context_menu_last);
326 }
327
328 fn register_key_listeners(&self, cx: &mut WindowContext) {
329 cx.on_key_event({
330 let editor = self.editor.clone();
331 move |event: &ModifiersChangedEvent, phase, cx| {
332 if phase != DispatchPhase::Bubble {
333 return;
334 }
335
336 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
337 cx.stop_propagation();
338 }
339 }
340 });
341 }
342
343 pub(crate) fn modifiers_changed(
344 editor: &mut Editor,
345 event: &ModifiersChangedEvent,
346 cx: &mut ViewContext<Editor>,
347 ) -> bool {
348 let pending_selection = editor.has_pending_selection();
349
350 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
351 if event.command && !pending_selection {
352 let point = point.clone();
353 let snapshot = editor.snapshot(cx);
354 let kind = point.definition_kind(event.shift);
355
356 show_link_definition(kind, editor, point, snapshot, cx);
357 return false;
358 }
359 }
360
361 {
362 if editor.link_go_to_definition_state.symbol_range.is_some()
363 || !editor.link_go_to_definition_state.definitions.is_empty()
364 {
365 editor.link_go_to_definition_state.symbol_range.take();
366 editor.link_go_to_definition_state.definitions.clear();
367 cx.notify();
368 }
369
370 editor.link_go_to_definition_state.task = None;
371
372 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
373 }
374
375 false
376 }
377
378 fn mouse_left_down(
379 editor: &mut Editor,
380 event: &MouseDownEvent,
381 position_map: &PositionMap,
382 text_bounds: Bounds<Pixels>,
383 gutter_bounds: Bounds<Pixels>,
384 stacking_order: &StackingOrder,
385 cx: &mut ViewContext<Editor>,
386 ) {
387 let mut click_count = event.click_count;
388 let modifiers = event.modifiers;
389
390 if gutter_bounds.contains(&event.position) {
391 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
392 } else if !text_bounds.contains(&event.position) {
393 return;
394 }
395 if !cx.was_top_layer(&event.position, stacking_order) {
396 return;
397 }
398
399 let point_for_position = position_map.point_for_position(text_bounds, event.position);
400 let position = point_for_position.previous_valid;
401 if modifiers.shift && modifiers.alt {
402 editor.select(
403 SelectPhase::BeginColumnar {
404 position,
405 goal_column: point_for_position.exact_unclipped.column(),
406 },
407 cx,
408 );
409 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
410 editor.select(
411 SelectPhase::Extend {
412 position,
413 click_count,
414 },
415 cx,
416 );
417 } else {
418 editor.select(
419 SelectPhase::Begin {
420 position,
421 add: modifiers.alt,
422 click_count,
423 },
424 cx,
425 );
426 }
427
428 cx.stop_propagation();
429 }
430
431 fn mouse_right_down(
432 editor: &mut Editor,
433 event: &MouseDownEvent,
434 position_map: &PositionMap,
435 text_bounds: Bounds<Pixels>,
436 cx: &mut ViewContext<Editor>,
437 ) {
438 if !text_bounds.contains(&event.position) {
439 return;
440 }
441 let point_for_position = position_map.point_for_position(text_bounds, event.position);
442 mouse_context_menu::deploy_context_menu(
443 editor,
444 event.position,
445 point_for_position.previous_valid,
446 cx,
447 );
448 cx.stop_propagation();
449 }
450
451 fn mouse_up(
452 editor: &mut Editor,
453 event: &MouseUpEvent,
454 position_map: &PositionMap,
455 text_bounds: Bounds<Pixels>,
456 stacking_order: &StackingOrder,
457 cx: &mut ViewContext<Editor>,
458 ) {
459 let end_selection = editor.has_pending_selection();
460 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
461
462 if end_selection {
463 editor.select(SelectPhase::End, cx);
464 }
465
466 if !pending_nonempty_selections
467 && event.modifiers.command
468 && text_bounds.contains(&event.position)
469 && cx.was_top_layer(&event.position, stacking_order)
470 {
471 let point = position_map.point_for_position(text_bounds, event.position);
472 let could_be_inlay = point.as_valid().is_none();
473 let split = event.modifiers.alt;
474 if event.modifiers.shift || could_be_inlay {
475 go_to_fetched_type_definition(editor, point, split, cx);
476 } else {
477 go_to_fetched_definition(editor, point, split, cx);
478 }
479
480 cx.stop_propagation();
481 } else if end_selection {
482 cx.stop_propagation();
483 }
484 }
485
486 fn mouse_dragged(
487 editor: &mut Editor,
488 event: &MouseMoveEvent,
489 position_map: &PositionMap,
490 text_bounds: Bounds<Pixels>,
491 _gutter_bounds: Bounds<Pixels>,
492 _stacking_order: &StackingOrder,
493 cx: &mut ViewContext<Editor>,
494 ) {
495 if !editor.has_pending_selection() {
496 return;
497 }
498
499 let point_for_position = position_map.point_for_position(text_bounds, event.position);
500 let mut scroll_delta = gpui::Point::<f32>::default();
501 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
502 let top = text_bounds.origin.y + vertical_margin;
503 let bottom = text_bounds.lower_left().y - vertical_margin;
504 if event.position.y < top {
505 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
506 }
507 if event.position.y > bottom {
508 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
509 }
510
511 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
512 let left = text_bounds.origin.x + horizontal_margin;
513 let right = text_bounds.upper_right().x - horizontal_margin;
514 if event.position.x < left {
515 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
516 }
517 if event.position.x > right {
518 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
519 }
520
521 editor.select(
522 SelectPhase::Update {
523 position: point_for_position.previous_valid,
524 goal_column: point_for_position.exact_unclipped.column(),
525 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
526 .clamp(&gpui::Point::default(), &position_map.scroll_max),
527 },
528 cx,
529 );
530 }
531
532 fn mouse_moved(
533 editor: &mut Editor,
534 event: &MouseMoveEvent,
535 position_map: &PositionMap,
536 text_bounds: Bounds<Pixels>,
537 gutter_bounds: Bounds<Pixels>,
538 stacking_order: &StackingOrder,
539 cx: &mut ViewContext<Editor>,
540 ) {
541 let modifiers = event.modifiers;
542 let text_hovered = text_bounds.contains(&event.position);
543 let gutter_hovered = gutter_bounds.contains(&event.position);
544 let was_top = cx.was_top_layer(&event.position, stacking_order);
545
546 editor.set_gutter_hovered(gutter_hovered, cx);
547
548 // Don't trigger hover popover if mouse is hovering over context menu
549 if text_hovered && was_top {
550 let point_for_position = position_map.point_for_position(text_bounds, event.position);
551
552 match point_for_position.as_valid() {
553 Some(point) => {
554 update_go_to_definition_link(
555 editor,
556 Some(GoToDefinitionTrigger::Text(point)),
557 modifiers.command,
558 modifiers.shift,
559 cx,
560 );
561 hover_at(editor, Some(point), cx);
562 }
563 None => {
564 update_inlay_link_and_hover_points(
565 &position_map.snapshot,
566 point_for_position,
567 editor,
568 modifiers.command,
569 modifiers.shift,
570 cx,
571 );
572 }
573 }
574 } else {
575 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
576 hover_at(editor, None, cx);
577 if gutter_hovered && was_top {
578 cx.stop_propagation();
579 }
580 }
581 }
582
583 fn scroll(
584 editor: &mut Editor,
585 event: &ScrollWheelEvent,
586 position_map: &PositionMap,
587 bounds: &InteractiveBounds,
588 cx: &mut ViewContext<Editor>,
589 ) {
590 if !bounds.visibly_contains(&event.position, cx) {
591 return;
592 }
593
594 let line_height = position_map.line_height;
595 let max_glyph_width = position_map.em_width;
596 let (delta, axis) = match event.delta {
597 gpui::ScrollDelta::Pixels(mut pixels) => {
598 //Trackpad
599 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
600 (pixels, axis)
601 }
602
603 gpui::ScrollDelta::Lines(lines) => {
604 //Not trackpad
605 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
606 (pixels, None)
607 }
608 };
609
610 let scroll_position = position_map.snapshot.scroll_position();
611 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
612 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
613 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
614 editor.scroll(scroll_position, axis, cx);
615 cx.stop_propagation();
616 }
617
618 fn paint_background(
619 &self,
620 gutter_bounds: Bounds<Pixels>,
621 text_bounds: Bounds<Pixels>,
622 layout: &LayoutState,
623 cx: &mut WindowContext,
624 ) {
625 let bounds = gutter_bounds.union(&text_bounds);
626 let scroll_top =
627 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
628 let gutter_bg = cx.theme().colors().editor_gutter_background;
629 cx.paint_quad(fill(gutter_bounds, gutter_bg));
630 cx.paint_quad(fill(text_bounds, self.style.background));
631
632 if let EditorMode::Full = layout.mode {
633 let mut active_rows = layout.active_rows.iter().peekable();
634 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
635 let mut end_row = *start_row;
636 while active_rows.peek().map_or(false, |r| {
637 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
638 }) {
639 active_rows.next().unwrap();
640 end_row += 1;
641 }
642
643 if !contains_non_empty_selection {
644 let origin = point(
645 bounds.origin.x,
646 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
647 - scroll_top,
648 );
649 let size = size(
650 bounds.size.width,
651 layout.position_map.line_height * (end_row - start_row + 1) as f32,
652 );
653 let active_line_bg = cx.theme().colors().editor_active_line_background;
654 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
655 }
656 }
657
658 if let Some(highlighted_rows) = &layout.highlighted_rows {
659 let origin = point(
660 bounds.origin.x,
661 bounds.origin.y
662 + (layout.position_map.line_height * highlighted_rows.start as f32)
663 - scroll_top,
664 );
665 let size = size(
666 bounds.size.width,
667 layout.position_map.line_height * highlighted_rows.len() as f32,
668 );
669 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
670 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
671 }
672
673 let scroll_left =
674 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
675
676 for (wrap_position, active) in layout.wrap_guides.iter() {
677 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
678 - scroll_left;
679
680 if x < text_bounds.origin.x
681 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
682 {
683 continue;
684 }
685
686 let color = if *active {
687 cx.theme().colors().editor_active_wrap_guide
688 } else {
689 cx.theme().colors().editor_wrap_guide
690 };
691 cx.paint_quad(fill(
692 Bounds {
693 origin: point(x, text_bounds.origin.y),
694 size: size(px(1.), text_bounds.size.height),
695 },
696 color,
697 ));
698 }
699 }
700 }
701
702 fn paint_gutter(
703 &mut self,
704 bounds: Bounds<Pixels>,
705 layout: &mut LayoutState,
706 cx: &mut WindowContext,
707 ) {
708 let line_height = layout.position_map.line_height;
709
710 let scroll_position = layout.position_map.snapshot.scroll_position();
711 let scroll_top = scroll_position.y * line_height;
712
713 let show_gutter = matches!(
714 ProjectSettings::get_global(cx).git.git_gutter,
715 Some(GitGutterSetting::TrackedFiles)
716 );
717
718 if show_gutter {
719 Self::paint_diff_hunks(bounds, layout, cx);
720 }
721
722 for (ix, line) in layout.line_numbers.iter().enumerate() {
723 if let Some(line) = line {
724 let line_origin = bounds.origin
725 + point(
726 bounds.size.width - line.width - layout.gutter_padding,
727 ix as f32 * line_height - (scroll_top % line_height),
728 );
729
730 line.paint(line_origin, line_height, cx).log_err();
731 }
732 }
733
734 cx.with_z_index(1, |cx| {
735 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
736 if let Some(fold_indicator) = fold_indicator {
737 let mut fold_indicator = fold_indicator.into_any_element();
738 let available_space = size(
739 AvailableSpace::MinContent,
740 AvailableSpace::Definite(line_height * 0.55),
741 );
742 let fold_indicator_size = fold_indicator.measure(available_space, cx);
743
744 let position = point(
745 bounds.size.width - layout.gutter_padding,
746 ix as f32 * line_height - (scroll_top % line_height),
747 );
748 let centering_offset = point(
749 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
750 / 2.,
751 (line_height - fold_indicator_size.height) / 2.,
752 );
753 let origin = bounds.origin + position + centering_offset;
754 fold_indicator.draw(origin, available_space, cx);
755 }
756 }
757
758 if let Some(indicator) = layout.code_actions_indicator.take() {
759 let mut button = indicator.button.into_any_element();
760 let available_space = size(
761 AvailableSpace::MinContent,
762 AvailableSpace::Definite(line_height),
763 );
764 let indicator_size = button.measure(available_space, cx);
765
766 let mut x = Pixels::ZERO;
767 let mut y = indicator.row as f32 * line_height - scroll_top;
768 // Center indicator.
769 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
770 y += (line_height - indicator_size.height) / 2.;
771
772 button.draw(bounds.origin + point(x, y), available_space, cx);
773 }
774 });
775 }
776
777 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
778 let line_height = layout.position_map.line_height;
779
780 let scroll_position = layout.position_map.snapshot.scroll_position();
781 let scroll_top = scroll_position.y * line_height;
782
783 for hunk in &layout.display_hunks {
784 let (display_row_range, status) = match hunk {
785 //TODO: This rendering is entirely a horrible hack
786 &DisplayDiffHunk::Folded { display_row: row } => {
787 let start_y = row as f32 * line_height - scroll_top;
788 let end_y = start_y + line_height;
789
790 let width = 0.275 * line_height;
791 let highlight_origin = bounds.origin + point(-width, start_y);
792 let highlight_size = size(width * 2., end_y - start_y);
793 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
794 cx.paint_quad(quad(
795 highlight_bounds,
796 Corners::all(1. * line_height),
797 gpui::yellow(), // todo!("use the right color")
798 Edges::default(),
799 transparent_black(),
800 ));
801
802 continue;
803 }
804
805 DisplayDiffHunk::Unfolded {
806 display_row_range,
807 status,
808 } => (display_row_range, status),
809 };
810
811 let color = match status {
812 DiffHunkStatus::Added => cx.theme().status().created,
813 DiffHunkStatus::Modified => cx.theme().status().modified,
814
815 //TODO: This rendering is entirely a horrible hack
816 DiffHunkStatus::Removed => {
817 let row = display_row_range.start;
818
819 let offset = line_height / 2.;
820 let start_y = row as f32 * line_height - offset - scroll_top;
821 let end_y = start_y + line_height;
822
823 let width = 0.275 * line_height;
824 let highlight_origin = bounds.origin + point(-width, start_y);
825 let highlight_size = size(width * 2., end_y - start_y);
826 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
827 cx.paint_quad(quad(
828 highlight_bounds,
829 Corners::all(1. * line_height),
830 cx.theme().status().deleted,
831 Edges::default(),
832 transparent_black(),
833 ));
834
835 continue;
836 }
837 };
838
839 let start_row = display_row_range.start;
840 let end_row = display_row_range.end;
841
842 let start_y = start_row as f32 * line_height - scroll_top;
843 let end_y = end_row as f32 * line_height - scroll_top;
844
845 let width = 0.275 * line_height;
846 let highlight_origin = bounds.origin + point(-width, start_y);
847 let highlight_size = size(width * 2., end_y - start_y);
848 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
849 cx.paint_quad(quad(
850 highlight_bounds,
851 Corners::all(0.05 * line_height),
852 color, // todo!("use the right color")
853 Edges::default(),
854 transparent_black(),
855 ));
856 }
857 }
858
859 fn paint_text(
860 &mut self,
861 text_bounds: Bounds<Pixels>,
862 layout: &mut LayoutState,
863 cx: &mut WindowContext,
864 ) {
865 let start_row = layout.visible_display_row_range.start;
866 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
867 let line_end_overshoot = 0.15 * layout.position_map.line_height;
868 let whitespace_setting = self
869 .editor
870 .read(cx)
871 .buffer
872 .read(cx)
873 .settings_at(0, cx)
874 .show_whitespaces;
875
876 cx.with_content_mask(
877 Some(ContentMask {
878 bounds: text_bounds,
879 }),
880 |cx| {
881 let interactive_text_bounds = InteractiveBounds {
882 bounds: text_bounds,
883 stacking_order: cx.stacking_order().clone(),
884 };
885 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
886 if self
887 .editor
888 .read(cx)
889 .link_go_to_definition_state
890 .definitions
891 .is_empty()
892 {
893 cx.set_cursor_style(CursorStyle::IBeam);
894 } else {
895 cx.set_cursor_style(CursorStyle::PointingHand);
896 }
897 }
898
899 let fold_corner_radius = 0.15 * layout.position_map.line_height;
900 cx.with_element_id(Some("folds"), |cx| {
901 let snapshot = &layout.position_map.snapshot;
902 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
903 let fold_range = fold.range.clone();
904 let display_range = fold.range.start.to_display_point(&snapshot)
905 ..fold.range.end.to_display_point(&snapshot);
906 debug_assert_eq!(display_range.start.row(), display_range.end.row());
907 let row = display_range.start.row();
908
909 let line_layout = &layout.position_map.line_layouts
910 [(row - layout.visible_display_row_range.start) as usize]
911 .line;
912 let start_x = content_origin.x
913 + line_layout.x_for_index(display_range.start.column() as usize)
914 - layout.position_map.scroll_position.x;
915 let start_y = content_origin.y
916 + row as f32 * layout.position_map.line_height
917 - layout.position_map.scroll_position.y;
918 let end_x = content_origin.x
919 + line_layout.x_for_index(display_range.end.column() as usize)
920 - layout.position_map.scroll_position.x;
921
922 let fold_bounds = Bounds {
923 origin: point(start_x, start_y),
924 size: size(end_x - start_x, layout.position_map.line_height),
925 };
926
927 let fold_background = cx.with_z_index(1, |cx| {
928 div()
929 .id(fold.id)
930 .size_full()
931 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
932 .on_click(cx.listener_for(
933 &self.editor,
934 move |editor: &mut Editor, _, cx| {
935 editor.unfold_ranges(
936 [fold_range.start..fold_range.end],
937 true,
938 false,
939 cx,
940 );
941 cx.stop_propagation();
942 },
943 ))
944 .draw_and_update_state(
945 fold_bounds.origin,
946 fold_bounds.size,
947 cx,
948 |fold_element_state, cx| {
949 if fold_element_state.is_active() {
950 cx.theme().colors().ghost_element_active
951 } else if fold_bounds.contains(&cx.mouse_position()) {
952 cx.theme().colors().ghost_element_hover
953 } else {
954 cx.theme().colors().ghost_element_background
955 }
956 },
957 )
958 });
959
960 self.paint_highlighted_range(
961 display_range.clone(),
962 fold_background,
963 fold_corner_radius,
964 fold_corner_radius * 2.,
965 layout,
966 content_origin,
967 text_bounds,
968 cx,
969 );
970 }
971 });
972
973 for (range, color) in &layout.highlighted_ranges {
974 self.paint_highlighted_range(
975 range.clone(),
976 *color,
977 Pixels::ZERO,
978 line_end_overshoot,
979 layout,
980 content_origin,
981 text_bounds,
982 cx,
983 );
984 }
985
986 let mut cursors = SmallVec::<[Cursor; 32]>::new();
987 let corner_radius = 0.15 * layout.position_map.line_height;
988 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
989
990 for (selection_style, selections) in &layout.selections {
991 for selection in selections {
992 self.paint_highlighted_range(
993 selection.range.clone(),
994 selection_style.selection,
995 corner_radius,
996 corner_radius * 2.,
997 layout,
998 content_origin,
999 text_bounds,
1000 cx,
1001 );
1002
1003 if selection.is_local && !selection.range.is_empty() {
1004 invisible_display_ranges.push(selection.range.clone());
1005 }
1006
1007 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1008 let cursor_position = selection.head;
1009 if layout
1010 .visible_display_row_range
1011 .contains(&cursor_position.row())
1012 {
1013 let cursor_row_layout = &layout.position_map.line_layouts
1014 [(cursor_position.row() - start_row) as usize]
1015 .line;
1016 let cursor_column = cursor_position.column() as usize;
1017
1018 let cursor_character_x =
1019 cursor_row_layout.x_for_index(cursor_column);
1020 let mut block_width = cursor_row_layout
1021 .x_for_index(cursor_column + 1)
1022 - cursor_character_x;
1023 if block_width == Pixels::ZERO {
1024 block_width = layout.position_map.em_width;
1025 }
1026 let block_text = if let CursorShape::Block = selection.cursor_shape
1027 {
1028 layout
1029 .position_map
1030 .snapshot
1031 .chars_at(cursor_position)
1032 .next()
1033 .and_then(|(character, _)| {
1034 // todo!() currently shape_line panics if text conatins newlines
1035 let text = if character == '\n' {
1036 SharedString::from(" ")
1037 } else {
1038 SharedString::from(character.to_string())
1039 };
1040 let len = text.len();
1041 cx.text_system()
1042 .shape_line(
1043 text,
1044 cursor_row_layout.font_size,
1045 &[TextRun {
1046 len,
1047 font: self.style.text.font(),
1048 color: self.style.background,
1049 background_color: None,
1050 underline: None,
1051 }],
1052 )
1053 .log_err()
1054 })
1055 } else {
1056 None
1057 };
1058
1059 let x = cursor_character_x - layout.position_map.scroll_position.x;
1060 let y = cursor_position.row() as f32
1061 * layout.position_map.line_height
1062 - layout.position_map.scroll_position.y;
1063 if selection.is_newest {
1064 self.editor.update(cx, |editor, _| {
1065 editor.pixel_position_of_newest_cursor = Some(point(
1066 text_bounds.origin.x + x + block_width / 2.,
1067 text_bounds.origin.y
1068 + y
1069 + layout.position_map.line_height / 2.,
1070 ))
1071 });
1072 }
1073 cursors.push(Cursor {
1074 color: selection_style.cursor,
1075 block_width,
1076 origin: point(x, y),
1077 line_height: layout.position_map.line_height,
1078 shape: selection.cursor_shape,
1079 block_text,
1080 });
1081 }
1082 }
1083 }
1084 }
1085
1086 for (ix, line_with_invisibles) in
1087 layout.position_map.line_layouts.iter().enumerate()
1088 {
1089 let row = start_row + ix as u32;
1090 line_with_invisibles.draw(
1091 layout,
1092 row,
1093 content_origin,
1094 whitespace_setting,
1095 &invisible_display_ranges,
1096 cx,
1097 )
1098 }
1099
1100 cx.with_z_index(0, |cx| {
1101 for cursor in cursors {
1102 cursor.paint(content_origin, cx);
1103 }
1104 });
1105 },
1106 )
1107 }
1108
1109 fn paint_overlays(
1110 &mut self,
1111 text_bounds: Bounds<Pixels>,
1112 layout: &mut LayoutState,
1113 cx: &mut WindowContext,
1114 ) {
1115 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1116 let start_row = layout.visible_display_row_range.start;
1117 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1118 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1119 let context_menu_size = context_menu.measure(available_space, cx);
1120
1121 let cursor_row_layout =
1122 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1123 let x = cursor_row_layout.x_for_index(position.column() as usize)
1124 - layout.position_map.scroll_position.x;
1125 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1126 - layout.position_map.scroll_position.y;
1127 let mut list_origin = content_origin + point(x, y);
1128 let list_width = context_menu_size.width;
1129 let list_height = context_menu_size.height;
1130
1131 // Snap the right edge of the list to the right edge of the window if
1132 // its horizontal bounds overflow.
1133 if list_origin.x + list_width > cx.viewport_size().width {
1134 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1135 }
1136
1137 if list_origin.y + list_height > text_bounds.lower_right().y {
1138 list_origin.y -= layout.position_map.line_height + list_height;
1139 }
1140
1141 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1142 }
1143
1144 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1145 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1146
1147 // This is safe because we check on layout whether the required row is available
1148 let hovered_row_layout =
1149 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1150
1151 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1152 // height. This is the size we will use to decide whether to render popovers above or below
1153 // the hovered line.
1154 let first_size = hover_popovers[0].measure(available_space, cx);
1155 let height_to_reserve =
1156 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1157
1158 // Compute Hovered Point
1159 let x = hovered_row_layout.x_for_index(position.column() as usize)
1160 - layout.position_map.scroll_position.x;
1161 let y = position.row() as f32 * layout.position_map.line_height
1162 - layout.position_map.scroll_position.y;
1163 let hovered_point = content_origin + point(x, y);
1164
1165 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1166 // There is enough space above. Render popovers above the hovered point
1167 let mut current_y = hovered_point.y;
1168 for mut hover_popover in hover_popovers {
1169 let size = hover_popover.measure(available_space, cx);
1170 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1171
1172 let x_out_of_bounds =
1173 text_bounds.upper_right().x - (popover_origin.x + size.width);
1174 if x_out_of_bounds < Pixels::ZERO {
1175 popover_origin.x = popover_origin.x + x_out_of_bounds;
1176 }
1177
1178 cx.break_content_mask(|cx| {
1179 hover_popover.draw(popover_origin, available_space, cx)
1180 });
1181
1182 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1183 }
1184 } else {
1185 // There is not enough space above. Render popovers below the hovered point
1186 let mut current_y = hovered_point.y + layout.position_map.line_height;
1187 for mut hover_popover in hover_popovers {
1188 let size = hover_popover.measure(available_space, cx);
1189 let mut popover_origin = point(hovered_point.x, current_y);
1190
1191 let x_out_of_bounds =
1192 text_bounds.upper_right().x - (popover_origin.x + size.width);
1193 if x_out_of_bounds < Pixels::ZERO {
1194 popover_origin.x = popover_origin.x + x_out_of_bounds;
1195 }
1196
1197 hover_popover.draw(popover_origin, available_space, cx);
1198
1199 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1200 }
1201 }
1202 }
1203
1204 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1205 let element = overlay()
1206 .position(mouse_context_menu.position)
1207 .child(mouse_context_menu.context_menu.clone())
1208 .anchor(AnchorCorner::TopLeft)
1209 .snap_to_window();
1210 element.into_any().draw(
1211 gpui::Point::default(),
1212 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1213 cx,
1214 );
1215 }
1216 }
1217
1218 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1219 bounds.upper_right().x - self.style.scrollbar_width
1220 }
1221
1222 fn paint_scrollbar(
1223 &mut self,
1224 bounds: Bounds<Pixels>,
1225 layout: &mut LayoutState,
1226 cx: &mut WindowContext,
1227 ) {
1228 if layout.mode != EditorMode::Full {
1229 return;
1230 }
1231
1232 let top = bounds.origin.y;
1233 let bottom = bounds.lower_left().y;
1234 let right = bounds.lower_right().x;
1235 let left = self.scrollbar_left(&bounds);
1236 let row_range = layout.scrollbar_row_range.clone();
1237 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1238
1239 let mut height = bounds.size.height;
1240 let mut first_row_y_offset = px(0.0);
1241
1242 // Impose a minimum height on the scrollbar thumb
1243 let row_height = height / max_row;
1244 let min_thumb_height = layout.position_map.line_height;
1245 let thumb_height = (row_range.end - row_range.start) * row_height;
1246 if thumb_height < min_thumb_height {
1247 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1248 height -= min_thumb_height - thumb_height;
1249 }
1250
1251 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1252
1253 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1254 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1255 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1256 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1257
1258 if layout.show_scrollbars {
1259 cx.paint_quad(quad(
1260 track_bounds,
1261 Corners::default(),
1262 cx.theme().colors().scrollbar_track_background,
1263 Edges {
1264 top: Pixels::ZERO,
1265 right: Pixels::ZERO,
1266 bottom: Pixels::ZERO,
1267 left: px(1.),
1268 },
1269 cx.theme().colors().scrollbar_track_border,
1270 ));
1271 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1272 if layout.is_singleton && scrollbar_settings.selections {
1273 let start_anchor = Anchor::min();
1274 let end_anchor = Anchor::max();
1275 let background_ranges = self
1276 .editor
1277 .read(cx)
1278 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1279 start_anchor..end_anchor,
1280 &layout.position_map.snapshot,
1281 50000,
1282 );
1283 for range in background_ranges {
1284 let start_y = y_for_row(range.start().row() as f32);
1285 let mut end_y = y_for_row(range.end().row() as f32);
1286 if end_y - start_y < px(1.) {
1287 end_y = start_y + px(1.);
1288 }
1289 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1290 cx.paint_quad(quad(
1291 bounds,
1292 Corners::default(),
1293 cx.theme().status().info,
1294 Edges {
1295 top: Pixels::ZERO,
1296 right: px(1.),
1297 bottom: Pixels::ZERO,
1298 left: px(1.),
1299 },
1300 cx.theme().colors().scrollbar_thumb_border,
1301 ));
1302 }
1303 }
1304
1305 if layout.is_singleton && scrollbar_settings.git_diff {
1306 for hunk in layout
1307 .position_map
1308 .snapshot
1309 .buffer_snapshot
1310 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1311 {
1312 let start_display = Point::new(hunk.buffer_range.start, 0)
1313 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1314 let end_display = Point::new(hunk.buffer_range.end, 0)
1315 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1316 let start_y = y_for_row(start_display.row() as f32);
1317 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1318 y_for_row((end_display.row() + 1) as f32)
1319 } else {
1320 y_for_row((end_display.row()) as f32)
1321 };
1322
1323 if end_y - start_y < px(1.) {
1324 end_y = start_y + px(1.);
1325 }
1326 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1327
1328 let color = match hunk.status() {
1329 DiffHunkStatus::Added => cx.theme().status().created,
1330 DiffHunkStatus::Modified => cx.theme().status().modified,
1331 DiffHunkStatus::Removed => cx.theme().status().deleted,
1332 };
1333 cx.paint_quad(quad(
1334 bounds,
1335 Corners::default(),
1336 color,
1337 Edges {
1338 top: Pixels::ZERO,
1339 right: px(1.),
1340 bottom: Pixels::ZERO,
1341 left: px(1.),
1342 },
1343 cx.theme().colors().scrollbar_thumb_border,
1344 ));
1345 }
1346 }
1347
1348 cx.paint_quad(quad(
1349 thumb_bounds,
1350 Corners::default(),
1351 cx.theme().colors().scrollbar_thumb_background,
1352 Edges {
1353 top: Pixels::ZERO,
1354 right: px(1.),
1355 bottom: Pixels::ZERO,
1356 left: px(1.),
1357 },
1358 cx.theme().colors().scrollbar_thumb_border,
1359 ));
1360 }
1361
1362 let interactive_track_bounds = InteractiveBounds {
1363 bounds: track_bounds,
1364 stacking_order: cx.stacking_order().clone(),
1365 };
1366 let mut mouse_position = cx.mouse_position();
1367 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1368 cx.set_cursor_style(CursorStyle::Arrow);
1369 }
1370
1371 cx.on_mouse_event({
1372 let editor = self.editor.clone();
1373 move |event: &MouseMoveEvent, phase, cx| {
1374 if phase == DispatchPhase::Capture {
1375 return;
1376 }
1377
1378 editor.update(cx, |editor, cx| {
1379 if event.pressed_button == Some(MouseButton::Left)
1380 && editor.scroll_manager.is_dragging_scrollbar()
1381 {
1382 let y = mouse_position.y;
1383 let new_y = event.position.y;
1384 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1385 let mut position = editor.scroll_position(cx);
1386 position.y += (new_y - y) * (max_row as f32) / height;
1387 if position.y < 0.0 {
1388 position.y = 0.0;
1389 }
1390 editor.set_scroll_position(position, cx);
1391 }
1392
1393 mouse_position = event.position;
1394 cx.stop_propagation();
1395 } else {
1396 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1397 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1398 editor.scroll_manager.show_scrollbar(cx);
1399 }
1400 }
1401 })
1402 }
1403 });
1404
1405 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1406 cx.on_mouse_event({
1407 let editor = self.editor.clone();
1408 move |_: &MouseUpEvent, phase, cx| {
1409 if phase == DispatchPhase::Capture {
1410 return;
1411 }
1412
1413 editor.update(cx, |editor, cx| {
1414 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1415 cx.stop_propagation();
1416 });
1417 }
1418 });
1419 } else {
1420 cx.on_mouse_event({
1421 let editor = self.editor.clone();
1422 move |event: &MouseDownEvent, phase, cx| {
1423 if phase == DispatchPhase::Capture {
1424 return;
1425 }
1426
1427 editor.update(cx, |editor, cx| {
1428 if track_bounds.contains(&event.position) {
1429 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1430
1431 let y = event.position.y;
1432 if y < thumb_top || thumb_bottom < y {
1433 let center_row =
1434 ((y - top) * max_row as f32 / height).round() as u32;
1435 let top_row = center_row
1436 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1437 let mut position = editor.scroll_position(cx);
1438 position.y = top_row as f32;
1439 editor.set_scroll_position(position, cx);
1440 } else {
1441 editor.scroll_manager.show_scrollbar(cx);
1442 }
1443
1444 cx.stop_propagation();
1445 }
1446 });
1447 }
1448 });
1449 }
1450 }
1451
1452 #[allow(clippy::too_many_arguments)]
1453 fn paint_highlighted_range(
1454 &self,
1455 range: Range<DisplayPoint>,
1456 color: Hsla,
1457 corner_radius: Pixels,
1458 line_end_overshoot: Pixels,
1459 layout: &LayoutState,
1460 content_origin: gpui::Point<Pixels>,
1461 bounds: Bounds<Pixels>,
1462 cx: &mut WindowContext,
1463 ) {
1464 let start_row = layout.visible_display_row_range.start;
1465 let end_row = layout.visible_display_row_range.end;
1466 if range.start != range.end {
1467 let row_range = if range.end.column() == 0 {
1468 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1469 } else {
1470 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1471 };
1472
1473 let highlighted_range = HighlightedRange {
1474 color,
1475 line_height: layout.position_map.line_height,
1476 corner_radius,
1477 start_y: content_origin.y
1478 + row_range.start as f32 * layout.position_map.line_height
1479 - layout.position_map.scroll_position.y,
1480 lines: row_range
1481 .into_iter()
1482 .map(|row| {
1483 let line_layout =
1484 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1485 HighlightedRangeLine {
1486 start_x: if row == range.start.row() {
1487 content_origin.x
1488 + line_layout.x_for_index(range.start.column() as usize)
1489 - layout.position_map.scroll_position.x
1490 } else {
1491 content_origin.x - layout.position_map.scroll_position.x
1492 },
1493 end_x: if row == range.end.row() {
1494 content_origin.x
1495 + line_layout.x_for_index(range.end.column() as usize)
1496 - layout.position_map.scroll_position.x
1497 } else {
1498 content_origin.x + line_layout.width + line_end_overshoot
1499 - layout.position_map.scroll_position.x
1500 },
1501 }
1502 })
1503 .collect(),
1504 };
1505
1506 highlighted_range.paint(bounds, cx);
1507 }
1508 }
1509
1510 fn paint_blocks(
1511 &mut self,
1512 bounds: Bounds<Pixels>,
1513 layout: &mut LayoutState,
1514 cx: &mut WindowContext,
1515 ) {
1516 let scroll_position = layout.position_map.snapshot.scroll_position();
1517 let scroll_left = scroll_position.x * layout.position_map.em_width;
1518 let scroll_top = scroll_position.y * layout.position_map.line_height;
1519
1520 for mut block in layout.blocks.drain(..) {
1521 let mut origin = bounds.origin
1522 + point(
1523 Pixels::ZERO,
1524 block.row as f32 * layout.position_map.line_height - scroll_top,
1525 );
1526 if !matches!(block.style, BlockStyle::Sticky) {
1527 origin += point(-scroll_left, Pixels::ZERO);
1528 }
1529 block.element.draw(origin, block.available_space, cx);
1530 }
1531 }
1532
1533 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1534 let style = &self.style;
1535 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1536 let layout = cx
1537 .text_system()
1538 .shape_line(
1539 SharedString::from(" ".repeat(column)),
1540 font_size,
1541 &[TextRun {
1542 len: column,
1543 font: style.text.font(),
1544 color: Hsla::default(),
1545 background_color: None,
1546 underline: None,
1547 }],
1548 )
1549 .unwrap();
1550
1551 layout.width
1552 }
1553
1554 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1555 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1556 self.column_pixels(digit_count, cx)
1557 }
1558
1559 //Folds contained in a hunk are ignored apart from shrinking visual size
1560 //If a fold contains any hunks then that fold line is marked as modified
1561 fn layout_git_gutters(
1562 &self,
1563 display_rows: Range<u32>,
1564 snapshot: &EditorSnapshot,
1565 ) -> Vec<DisplayDiffHunk> {
1566 let buffer_snapshot = &snapshot.buffer_snapshot;
1567
1568 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1569 .to_point(snapshot)
1570 .row;
1571 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1572 .to_point(snapshot)
1573 .row;
1574
1575 buffer_snapshot
1576 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1577 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1578 .dedup()
1579 .collect()
1580 }
1581
1582 fn calculate_relative_line_numbers(
1583 &self,
1584 snapshot: &EditorSnapshot,
1585 rows: &Range<u32>,
1586 relative_to: Option<u32>,
1587 ) -> HashMap<u32, u32> {
1588 let mut relative_rows: HashMap<u32, u32> = Default::default();
1589 let Some(relative_to) = relative_to else {
1590 return relative_rows;
1591 };
1592
1593 let start = rows.start.min(relative_to);
1594 let end = rows.end.max(relative_to);
1595
1596 let buffer_rows = snapshot
1597 .buffer_rows(start)
1598 .take(1 + (end - start) as usize)
1599 .collect::<Vec<_>>();
1600
1601 let head_idx = relative_to - start;
1602 let mut delta = 1;
1603 let mut i = head_idx + 1;
1604 while i < buffer_rows.len() as u32 {
1605 if buffer_rows[i as usize].is_some() {
1606 if rows.contains(&(i + start)) {
1607 relative_rows.insert(i + start, delta);
1608 }
1609 delta += 1;
1610 }
1611 i += 1;
1612 }
1613 delta = 1;
1614 i = head_idx.min(buffer_rows.len() as u32 - 1);
1615 while i > 0 && buffer_rows[i as usize].is_none() {
1616 i -= 1;
1617 }
1618
1619 while i > 0 {
1620 i -= 1;
1621 if buffer_rows[i as usize].is_some() {
1622 if rows.contains(&(i + start)) {
1623 relative_rows.insert(i + start, delta);
1624 }
1625 delta += 1;
1626 }
1627 }
1628
1629 relative_rows
1630 }
1631
1632 fn shape_line_numbers(
1633 &self,
1634 rows: Range<u32>,
1635 active_rows: &BTreeMap<u32, bool>,
1636 newest_selection_head: DisplayPoint,
1637 is_singleton: bool,
1638 snapshot: &EditorSnapshot,
1639 cx: &ViewContext<Editor>,
1640 ) -> (
1641 Vec<Option<ShapedLine>>,
1642 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1643 ) {
1644 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1645 let include_line_numbers = snapshot.mode == EditorMode::Full;
1646 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1647 let mut fold_statuses = Vec::with_capacity(rows.len());
1648 let mut line_number = String::new();
1649 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1650 let relative_to = if is_relative {
1651 Some(newest_selection_head.row())
1652 } else {
1653 None
1654 };
1655
1656 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1657
1658 for (ix, row) in snapshot
1659 .buffer_rows(rows.start)
1660 .take((rows.end - rows.start) as usize)
1661 .enumerate()
1662 {
1663 let display_row = rows.start + ix as u32;
1664 let (active, color) = if active_rows.contains_key(&display_row) {
1665 (true, cx.theme().colors().editor_active_line_number)
1666 } else {
1667 (false, cx.theme().colors().editor_line_number)
1668 };
1669 if let Some(buffer_row) = row {
1670 if include_line_numbers {
1671 line_number.clear();
1672 let default_number = buffer_row + 1;
1673 let number = relative_rows
1674 .get(&(ix as u32 + rows.start))
1675 .unwrap_or(&default_number);
1676 write!(&mut line_number, "{}", number).unwrap();
1677 let run = TextRun {
1678 len: line_number.len(),
1679 font: self.style.text.font(),
1680 color,
1681 background_color: None,
1682 underline: None,
1683 };
1684 let shaped_line = cx
1685 .text_system()
1686 .shape_line(line_number.clone().into(), font_size, &[run])
1687 .unwrap();
1688 shaped_line_numbers.push(Some(shaped_line));
1689 fold_statuses.push(
1690 is_singleton
1691 .then(|| {
1692 snapshot
1693 .fold_for_line(buffer_row)
1694 .map(|fold_status| (fold_status, buffer_row, active))
1695 })
1696 .flatten(),
1697 )
1698 }
1699 } else {
1700 fold_statuses.push(None);
1701 shaped_line_numbers.push(None);
1702 }
1703 }
1704
1705 (shaped_line_numbers, fold_statuses)
1706 }
1707
1708 fn layout_lines(
1709 &self,
1710 rows: Range<u32>,
1711 line_number_layouts: &[Option<ShapedLine>],
1712 snapshot: &EditorSnapshot,
1713 cx: &ViewContext<Editor>,
1714 ) -> Vec<LineWithInvisibles> {
1715 if rows.start >= rows.end {
1716 return Vec::new();
1717 }
1718
1719 // Show the placeholder when the editor is empty
1720 if snapshot.is_empty() {
1721 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1722 let placeholder_color = cx.theme().colors().text_placeholder;
1723 let placeholder_text = snapshot.placeholder_text();
1724
1725 let placeholder_lines = placeholder_text
1726 .as_ref()
1727 .map_or("", AsRef::as_ref)
1728 .split('\n')
1729 .skip(rows.start as usize)
1730 .chain(iter::repeat(""))
1731 .take(rows.len());
1732 placeholder_lines
1733 .filter_map(move |line| {
1734 let run = TextRun {
1735 len: line.len(),
1736 font: self.style.text.font(),
1737 color: placeholder_color,
1738 background_color: None,
1739 underline: Default::default(),
1740 };
1741 cx.text_system()
1742 .shape_line(line.to_string().into(), font_size, &[run])
1743 .log_err()
1744 })
1745 .map(|line| LineWithInvisibles {
1746 line,
1747 invisibles: Vec::new(),
1748 })
1749 .collect()
1750 } else {
1751 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1752 LineWithInvisibles::from_chunks(
1753 chunks,
1754 &self.style.text,
1755 MAX_LINE_LEN,
1756 rows.len() as usize,
1757 line_number_layouts,
1758 snapshot.mode,
1759 cx,
1760 )
1761 }
1762 }
1763
1764 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1765 self.editor.update(cx, |editor, cx| {
1766 let snapshot = editor.snapshot(cx);
1767 let style = self.style.clone();
1768
1769 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1770 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1771 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1772 let em_width = cx
1773 .text_system()
1774 .typographic_bounds(font_id, font_size, 'm')
1775 .unwrap()
1776 .size
1777 .width;
1778 let em_advance = cx
1779 .text_system()
1780 .advance(font_id, font_size, 'm')
1781 .unwrap()
1782 .width;
1783
1784 let gutter_padding;
1785 let gutter_width;
1786 let gutter_margin;
1787 if snapshot.show_gutter {
1788 let descent = cx.text_system().descent(font_id, font_size);
1789
1790 let gutter_padding_factor = 3.5;
1791 gutter_padding = (em_width * gutter_padding_factor).round();
1792 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1793 gutter_margin = -descent;
1794 } else {
1795 gutter_padding = Pixels::ZERO;
1796 gutter_width = Pixels::ZERO;
1797 gutter_margin = Pixels::ZERO;
1798 };
1799
1800 editor.gutter_width = gutter_width;
1801
1802 let text_width = bounds.size.width - gutter_width;
1803 let overscroll = size(em_width, px(0.));
1804 let _snapshot = {
1805 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1806
1807 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1808 let wrap_width = match editor.soft_wrap_mode(cx) {
1809 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1810 SoftWrap::EditorWidth => editor_width,
1811 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1812 };
1813
1814 if editor.set_wrap_width(Some(wrap_width), cx) {
1815 editor.snapshot(cx)
1816 } else {
1817 snapshot
1818 }
1819 };
1820
1821 let wrap_guides = editor
1822 .wrap_guides(cx)
1823 .iter()
1824 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1825 .collect::<SmallVec<[_; 2]>>();
1826
1827 let gutter_size = size(gutter_width, bounds.size.height);
1828 let text_size = size(text_width, bounds.size.height);
1829
1830 let autoscroll_horizontally =
1831 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1832 let mut snapshot = editor.snapshot(cx);
1833
1834 let scroll_position = snapshot.scroll_position();
1835 // The scroll position is a fractional point, the whole number of which represents
1836 // the top of the window in terms of display rows.
1837 let start_row = scroll_position.y as u32;
1838 let height_in_lines = f32::from(bounds.size.height / line_height);
1839 let max_row = snapshot.max_point().row();
1840
1841 // Add 1 to ensure selections bleed off screen
1842 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1843
1844 let start_anchor = if start_row == 0 {
1845 Anchor::min()
1846 } else {
1847 snapshot
1848 .buffer_snapshot
1849 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1850 };
1851 let end_anchor = if end_row > max_row {
1852 Anchor::max()
1853 } else {
1854 snapshot
1855 .buffer_snapshot
1856 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1857 };
1858
1859 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1860 let mut active_rows = BTreeMap::new();
1861 let is_singleton = editor.is_singleton(cx);
1862
1863 let highlighted_rows = editor.highlighted_rows();
1864 let highlighted_ranges = editor.background_highlights_in_range(
1865 start_anchor..end_anchor,
1866 &snapshot.display_snapshot,
1867 cx.theme().colors(),
1868 );
1869
1870 let mut newest_selection_head = None;
1871
1872 if editor.show_local_selections {
1873 let mut local_selections: Vec<Selection<Point>> = editor
1874 .selections
1875 .disjoint_in_range(start_anchor..end_anchor, cx);
1876 local_selections.extend(editor.selections.pending(cx));
1877 let mut layouts = Vec::new();
1878 let newest = editor.selections.newest(cx);
1879 for selection in local_selections.drain(..) {
1880 let is_empty = selection.start == selection.end;
1881 let is_newest = selection == newest;
1882
1883 let layout = SelectionLayout::new(
1884 selection,
1885 editor.selections.line_mode,
1886 editor.cursor_shape,
1887 &snapshot.display_snapshot,
1888 is_newest,
1889 true,
1890 );
1891 if is_newest {
1892 newest_selection_head = Some(layout.head);
1893 }
1894
1895 for row in cmp::max(layout.active_rows.start, start_row)
1896 ..=cmp::min(layout.active_rows.end, end_row)
1897 {
1898 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1899 *contains_non_empty_selection |= !is_empty;
1900 }
1901 layouts.push(layout);
1902 }
1903
1904 let player = if editor.read_only(cx) {
1905 cx.theme().players().read_only()
1906 } else {
1907 style.local_player
1908 };
1909
1910 selections.push((player, layouts));
1911 }
1912
1913 if let Some(collaboration_hub) = &editor.collaboration_hub {
1914 // When following someone, render the local selections in their color.
1915 if let Some(leader_id) = editor.leader_peer_id {
1916 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1917 if let Some(participant_index) = collaboration_hub
1918 .user_participant_indices(cx)
1919 .get(&collaborator.user_id)
1920 {
1921 if let Some((local_selection_style, _)) = selections.first_mut() {
1922 *local_selection_style = cx
1923 .theme()
1924 .players()
1925 .color_for_participant(participant_index.0);
1926 }
1927 }
1928 }
1929 }
1930
1931 let mut remote_selections = HashMap::default();
1932 for selection in snapshot.remote_selections_in_range(
1933 &(start_anchor..end_anchor),
1934 collaboration_hub.as_ref(),
1935 cx,
1936 ) {
1937 let selection_style = if let Some(participant_index) = selection.participant_index {
1938 cx.theme()
1939 .players()
1940 .color_for_participant(participant_index.0)
1941 } else {
1942 cx.theme().players().absent()
1943 };
1944
1945 // Don't re-render the leader's selections, since the local selections
1946 // match theirs.
1947 if Some(selection.peer_id) == editor.leader_peer_id {
1948 continue;
1949 }
1950
1951 remote_selections
1952 .entry(selection.replica_id)
1953 .or_insert((selection_style, Vec::new()))
1954 .1
1955 .push(SelectionLayout::new(
1956 selection.selection,
1957 selection.line_mode,
1958 selection.cursor_shape,
1959 &snapshot.display_snapshot,
1960 false,
1961 false,
1962 ));
1963 }
1964
1965 selections.extend(remote_selections.into_values());
1966 }
1967
1968 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1969 let show_scrollbars = match scrollbar_settings.show {
1970 ShowScrollbar::Auto => {
1971 // Git
1972 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1973 ||
1974 // Selections
1975 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1976 // Scrollmanager
1977 || editor.scroll_manager.scrollbars_visible()
1978 }
1979 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1980 ShowScrollbar::Always => true,
1981 ShowScrollbar::Never => false,
1982 };
1983
1984 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1985 let newest = editor.selections.newest::<Point>(cx);
1986 SelectionLayout::new(
1987 newest,
1988 editor.selections.line_mode,
1989 editor.cursor_shape,
1990 &snapshot.display_snapshot,
1991 true,
1992 true,
1993 )
1994 .head
1995 });
1996
1997 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1998 start_row..end_row,
1999 &active_rows,
2000 head_for_relative,
2001 is_singleton,
2002 &snapshot,
2003 cx,
2004 );
2005
2006 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2007
2008 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2009
2010 let mut max_visible_line_width = Pixels::ZERO;
2011 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2012 for line_with_invisibles in &line_layouts {
2013 if line_with_invisibles.line.width > max_visible_line_width {
2014 max_visible_line_width = line_with_invisibles.line.width;
2015 }
2016 }
2017
2018 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2019 .unwrap()
2020 .width;
2021 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2022
2023 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2024 self.layout_blocks(
2025 start_row..end_row,
2026 &snapshot,
2027 bounds.size.width,
2028 scroll_width,
2029 gutter_padding,
2030 gutter_width,
2031 em_width,
2032 gutter_width + gutter_margin,
2033 line_height,
2034 &style,
2035 &line_layouts,
2036 editor,
2037 cx,
2038 )
2039 });
2040
2041 let scroll_max = point(
2042 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2043 max_row as f32,
2044 );
2045
2046 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2047
2048 let autoscrolled = if autoscroll_horizontally {
2049 editor.autoscroll_horizontally(
2050 start_row,
2051 text_size.width,
2052 scroll_width,
2053 em_width,
2054 &line_layouts,
2055 cx,
2056 )
2057 } else {
2058 false
2059 };
2060
2061 if clamped || autoscrolled {
2062 snapshot = editor.snapshot(cx);
2063 }
2064
2065 let mut context_menu = None;
2066 let mut code_actions_indicator = None;
2067 if let Some(newest_selection_head) = newest_selection_head {
2068 if (start_row..end_row).contains(&newest_selection_head.row()) {
2069 if editor.context_menu_visible() {
2070 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2071 context_menu =
2072 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2073 }
2074
2075 let active = matches!(
2076 editor.context_menu.read().as_ref(),
2077 Some(crate::ContextMenu::CodeActions(_))
2078 );
2079
2080 code_actions_indicator = editor
2081 .render_code_actions_indicator(&style, active, cx)
2082 .map(|element| CodeActionsIndicator {
2083 row: newest_selection_head.row(),
2084 button: element,
2085 });
2086 }
2087 }
2088
2089 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2090 let max_size = size(
2091 (120. * em_width) // Default size
2092 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2093 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2094 (16. * line_height) // Default size
2095 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2096 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2097 );
2098
2099 let hover = editor.hover_state.render(
2100 &snapshot,
2101 &style,
2102 visible_rows,
2103 max_size,
2104 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2105 cx,
2106 );
2107
2108 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2109 editor.render_fold_indicators(
2110 fold_statuses,
2111 &style,
2112 editor.gutter_hovered,
2113 line_height,
2114 gutter_margin,
2115 cx,
2116 )
2117 });
2118
2119 let invisible_symbol_font_size = font_size / 2.;
2120 let tab_invisible = cx
2121 .text_system()
2122 .shape_line(
2123 "→".into(),
2124 invisible_symbol_font_size,
2125 &[TextRun {
2126 len: "→".len(),
2127 font: self.style.text.font(),
2128 color: cx.theme().colors().editor_invisible,
2129 background_color: None,
2130 underline: None,
2131 }],
2132 )
2133 .unwrap();
2134 let space_invisible = cx
2135 .text_system()
2136 .shape_line(
2137 "•".into(),
2138 invisible_symbol_font_size,
2139 &[TextRun {
2140 len: "•".len(),
2141 font: self.style.text.font(),
2142 color: cx.theme().colors().editor_invisible,
2143 background_color: None,
2144 underline: None,
2145 }],
2146 )
2147 .unwrap();
2148
2149 LayoutState {
2150 mode: snapshot.mode,
2151 position_map: Arc::new(PositionMap {
2152 size: bounds.size,
2153 scroll_position: point(
2154 scroll_position.x * em_width,
2155 scroll_position.y * line_height,
2156 ),
2157 scroll_max,
2158 line_layouts,
2159 line_height,
2160 em_width,
2161 em_advance,
2162 snapshot,
2163 }),
2164 visible_anchor_range: start_anchor..end_anchor,
2165 visible_display_row_range: start_row..end_row,
2166 wrap_guides,
2167 gutter_size,
2168 gutter_padding,
2169 text_size,
2170 scrollbar_row_range,
2171 show_scrollbars,
2172 is_singleton,
2173 max_row,
2174 gutter_margin,
2175 active_rows,
2176 highlighted_rows,
2177 highlighted_ranges,
2178 line_numbers,
2179 display_hunks,
2180 blocks,
2181 selections,
2182 context_menu,
2183 code_actions_indicator,
2184 fold_indicators,
2185 tab_invisible,
2186 space_invisible,
2187 hover_popovers: hover,
2188 }
2189 })
2190 }
2191
2192 #[allow(clippy::too_many_arguments)]
2193 fn layout_blocks(
2194 &self,
2195 rows: Range<u32>,
2196 snapshot: &EditorSnapshot,
2197 editor_width: Pixels,
2198 scroll_width: Pixels,
2199 gutter_padding: Pixels,
2200 gutter_width: Pixels,
2201 em_width: Pixels,
2202 text_x: Pixels,
2203 line_height: Pixels,
2204 style: &EditorStyle,
2205 line_layouts: &[LineWithInvisibles],
2206 editor: &mut Editor,
2207 cx: &mut ViewContext<Editor>,
2208 ) -> (Pixels, Vec<BlockLayout>) {
2209 let mut block_id = 0;
2210 let (fixed_blocks, non_fixed_blocks) = snapshot
2211 .blocks_in_range(rows.clone())
2212 .partition::<Vec<_>, _>(|(_, block)| match block {
2213 TransformBlock::ExcerptHeader { .. } => false,
2214 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2215 });
2216
2217 let render_block = |block: &TransformBlock,
2218 available_space: Size<AvailableSpace>,
2219 block_id: usize,
2220 editor: &mut Editor,
2221 cx: &mut ViewContext<Editor>| {
2222 let mut element = match block {
2223 TransformBlock::Custom(block) => {
2224 let align_to = block
2225 .position()
2226 .to_point(&snapshot.buffer_snapshot)
2227 .to_display_point(snapshot);
2228 let anchor_x = text_x
2229 + if rows.contains(&align_to.row()) {
2230 line_layouts[(align_to.row() - rows.start) as usize]
2231 .line
2232 .x_for_index(align_to.column() as usize)
2233 } else {
2234 layout_line(align_to.row(), snapshot, style, cx)
2235 .unwrap()
2236 .x_for_index(align_to.column() as usize)
2237 };
2238
2239 block.render(&mut BlockContext {
2240 view_context: cx,
2241 anchor_x,
2242 gutter_padding,
2243 line_height,
2244 gutter_width,
2245 em_width,
2246 block_id,
2247 editor_style: &self.style,
2248 })
2249 }
2250
2251 TransformBlock::ExcerptHeader {
2252 buffer,
2253 range,
2254 starts_new_buffer,
2255 ..
2256 } => {
2257 let include_root = editor
2258 .project
2259 .as_ref()
2260 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2261 .unwrap_or_default();
2262
2263 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2264 let jump_path = ProjectPath {
2265 worktree_id: file.worktree_id(cx),
2266 path: file.path.clone(),
2267 };
2268 let jump_anchor = range
2269 .primary
2270 .as_ref()
2271 .map_or(range.context.start, |primary| primary.start);
2272 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2273
2274 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2275 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2276 });
2277
2278 jump_handler
2279 });
2280
2281 let element = if *starts_new_buffer {
2282 let path = buffer.resolve_file_path(cx, include_root);
2283 let mut filename = None;
2284 let mut parent_path = None;
2285 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2286 if let Some(path) = path {
2287 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2288 parent_path = path
2289 .parent()
2290 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2291 }
2292
2293 div()
2294 .id(("path header container", block_id))
2295 .size_full()
2296 .p_1p5()
2297 .child(
2298 h_stack()
2299 .id("path header block")
2300 .py_1p5()
2301 .pl_3()
2302 .pr_2()
2303 .rounded_lg()
2304 .shadow_md()
2305 .border()
2306 .border_color(cx.theme().colors().border)
2307 .bg(cx.theme().colors().editor_subheader_background)
2308 .justify_between()
2309 .hover(|style| style.bg(cx.theme().colors().element_hover))
2310 .child(
2311 h_stack().gap_3().child(
2312 h_stack()
2313 .gap_2()
2314 .child(
2315 filename
2316 .map(SharedString::from)
2317 .unwrap_or_else(|| "untitled".into()),
2318 )
2319 .when_some(parent_path, |then, path| {
2320 then.child(
2321 div().child(path).text_color(
2322 cx.theme().colors().text_muted,
2323 ),
2324 )
2325 }),
2326 ),
2327 )
2328 .when_some(jump_handler, |this, jump_handler| {
2329 this.cursor_pointer()
2330 .tooltip(|cx| {
2331 Tooltip::for_action(
2332 "Jump to Buffer",
2333 &OpenExcerpts,
2334 cx,
2335 )
2336 })
2337 .on_mouse_down(MouseButton::Left, |_, cx| {
2338 cx.stop_propagation()
2339 })
2340 .on_click(jump_handler)
2341 }),
2342 )
2343 } else {
2344 h_stack()
2345 .id(("collapsed context", block_id))
2346 .size_full()
2347 .gap(gutter_padding)
2348 .child(
2349 h_stack()
2350 .justify_end()
2351 .flex_none()
2352 .w(gutter_width - gutter_padding)
2353 .h_full()
2354 .text_buffer(cx)
2355 .text_color(cx.theme().colors().editor_line_number)
2356 .child("..."),
2357 )
2358 .map(|this| {
2359 if let Some(jump_handler) = jump_handler {
2360 this.child(
2361 ButtonLike::new("jump to collapsed context")
2362 .style(ButtonStyle::Transparent)
2363 .full_width()
2364 .on_click(jump_handler)
2365 .tooltip(|cx| {
2366 Tooltip::for_action(
2367 "Jump to Buffer",
2368 &OpenExcerpts,
2369 cx,
2370 )
2371 })
2372 .child(
2373 div()
2374 .h_px()
2375 .w_full()
2376 .bg(cx.theme().colors().border_variant)
2377 .group_hover("", |style| {
2378 style.bg(cx.theme().colors().border)
2379 }),
2380 ),
2381 )
2382 } else {
2383 this.child(div().size_full().bg(gpui::green()))
2384 }
2385 })
2386 };
2387 element.into_any()
2388 }
2389 };
2390
2391 let size = element.measure(available_space, cx);
2392 (element, size)
2393 };
2394
2395 let mut fixed_block_max_width = Pixels::ZERO;
2396 let mut blocks = Vec::new();
2397 for (row, block) in fixed_blocks {
2398 let available_space = size(
2399 AvailableSpace::MinContent,
2400 AvailableSpace::Definite(block.height() as f32 * line_height),
2401 );
2402 let (element, element_size) =
2403 render_block(block, available_space, block_id, editor, cx);
2404 block_id += 1;
2405 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2406 blocks.push(BlockLayout {
2407 row,
2408 element,
2409 available_space,
2410 style: BlockStyle::Fixed,
2411 });
2412 }
2413 for (row, block) in non_fixed_blocks {
2414 let style = match block {
2415 TransformBlock::Custom(block) => block.style(),
2416 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2417 };
2418 let width = match style {
2419 BlockStyle::Sticky => editor_width,
2420 BlockStyle::Flex => editor_width
2421 .max(fixed_block_max_width)
2422 .max(gutter_width + scroll_width),
2423 BlockStyle::Fixed => unreachable!(),
2424 };
2425 let available_space = size(
2426 AvailableSpace::Definite(width),
2427 AvailableSpace::Definite(block.height() as f32 * line_height),
2428 );
2429 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2430 block_id += 1;
2431 blocks.push(BlockLayout {
2432 row,
2433 element,
2434 available_space,
2435 style,
2436 });
2437 }
2438 (
2439 scroll_width.max(fixed_block_max_width - gutter_width),
2440 blocks,
2441 )
2442 }
2443
2444 fn paint_mouse_listeners(
2445 &mut self,
2446 bounds: Bounds<Pixels>,
2447 gutter_bounds: Bounds<Pixels>,
2448 text_bounds: Bounds<Pixels>,
2449 layout: &LayoutState,
2450 cx: &mut WindowContext,
2451 ) {
2452 let interactive_bounds = InteractiveBounds {
2453 bounds: bounds.intersect(&cx.content_mask().bounds),
2454 stacking_order: cx.stacking_order().clone(),
2455 };
2456
2457 cx.on_mouse_event({
2458 let position_map = layout.position_map.clone();
2459 let editor = self.editor.clone();
2460 let interactive_bounds = interactive_bounds.clone();
2461
2462 move |event: &ScrollWheelEvent, phase, cx| {
2463 if phase == DispatchPhase::Bubble
2464 && interactive_bounds.visibly_contains(&event.position, cx)
2465 {
2466 editor.update(cx, |editor, cx| {
2467 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2468 });
2469 }
2470 }
2471 });
2472
2473 cx.on_mouse_event({
2474 let position_map = layout.position_map.clone();
2475 let editor = self.editor.clone();
2476 let stacking_order = cx.stacking_order().clone();
2477 let interactive_bounds = interactive_bounds.clone();
2478
2479 move |event: &MouseDownEvent, phase, cx| {
2480 if phase == DispatchPhase::Bubble
2481 && interactive_bounds.visibly_contains(&event.position, cx)
2482 {
2483 match event.button {
2484 MouseButton::Left => editor.update(cx, |editor, cx| {
2485 Self::mouse_left_down(
2486 editor,
2487 event,
2488 &position_map,
2489 text_bounds,
2490 gutter_bounds,
2491 &stacking_order,
2492 cx,
2493 );
2494 }),
2495 MouseButton::Right => editor.update(cx, |editor, cx| {
2496 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2497 }),
2498 _ => {}
2499 };
2500 }
2501 }
2502 });
2503
2504 cx.on_mouse_event({
2505 let position_map = layout.position_map.clone();
2506 let editor = self.editor.clone();
2507 let stacking_order = cx.stacking_order().clone();
2508 let interactive_bounds = interactive_bounds.clone();
2509
2510 move |event: &MouseUpEvent, phase, cx| {
2511 if phase == DispatchPhase::Bubble
2512 && interactive_bounds.visibly_contains(&event.position, cx)
2513 {
2514 editor.update(cx, |editor, cx| {
2515 Self::mouse_up(
2516 editor,
2517 event,
2518 &position_map,
2519 text_bounds,
2520 &stacking_order,
2521 cx,
2522 )
2523 });
2524 }
2525 }
2526 });
2527 cx.on_mouse_event({
2528 let position_map = layout.position_map.clone();
2529 let editor = self.editor.clone();
2530 let stacking_order = cx.stacking_order().clone();
2531
2532 move |event: &MouseMoveEvent, phase, cx| {
2533 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2534
2535 if phase == DispatchPhase::Bubble {
2536 editor.update(cx, |editor, cx| {
2537 if event.pressed_button == Some(MouseButton::Left) {
2538 Self::mouse_dragged(
2539 editor,
2540 event,
2541 &position_map,
2542 text_bounds,
2543 gutter_bounds,
2544 &stacking_order,
2545 cx,
2546 )
2547 }
2548
2549 if interactive_bounds.visibly_contains(&event.position, cx) {
2550 Self::mouse_moved(
2551 editor,
2552 event,
2553 &position_map,
2554 text_bounds,
2555 gutter_bounds,
2556 &stacking_order,
2557 cx,
2558 )
2559 }
2560 });
2561 }
2562 }
2563 });
2564 }
2565}
2566
2567#[derive(Debug)]
2568pub struct LineWithInvisibles {
2569 pub line: ShapedLine,
2570 invisibles: Vec<Invisible>,
2571}
2572
2573impl LineWithInvisibles {
2574 fn from_chunks<'a>(
2575 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2576 text_style: &TextStyle,
2577 max_line_len: usize,
2578 max_line_count: usize,
2579 line_number_layouts: &[Option<ShapedLine>],
2580 editor_mode: EditorMode,
2581 cx: &WindowContext,
2582 ) -> Vec<Self> {
2583 let mut layouts = Vec::with_capacity(max_line_count);
2584 let mut line = String::new();
2585 let mut invisibles = Vec::new();
2586 let mut styles = Vec::new();
2587 let mut non_whitespace_added = false;
2588 let mut row = 0;
2589 let mut line_exceeded_max_len = false;
2590 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2591
2592 for highlighted_chunk in chunks.chain([HighlightedChunk {
2593 chunk: "\n",
2594 style: None,
2595 is_tab: false,
2596 }]) {
2597 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2598 if ix > 0 {
2599 let shaped_line = cx
2600 .text_system()
2601 .shape_line(line.clone().into(), font_size, &styles)
2602 .unwrap();
2603 layouts.push(Self {
2604 line: shaped_line,
2605 invisibles: invisibles.drain(..).collect(),
2606 });
2607
2608 line.clear();
2609 styles.clear();
2610 row += 1;
2611 line_exceeded_max_len = false;
2612 non_whitespace_added = false;
2613 if row == max_line_count {
2614 return layouts;
2615 }
2616 }
2617
2618 if !line_chunk.is_empty() && !line_exceeded_max_len {
2619 let text_style = if let Some(style) = highlighted_chunk.style {
2620 Cow::Owned(text_style.clone().highlight(style))
2621 } else {
2622 Cow::Borrowed(text_style)
2623 };
2624
2625 if line.len() + line_chunk.len() > max_line_len {
2626 let mut chunk_len = max_line_len - line.len();
2627 while !line_chunk.is_char_boundary(chunk_len) {
2628 chunk_len -= 1;
2629 }
2630 line_chunk = &line_chunk[..chunk_len];
2631 line_exceeded_max_len = true;
2632 }
2633
2634 styles.push(TextRun {
2635 len: line_chunk.len(),
2636 font: text_style.font(),
2637 color: text_style.color,
2638 background_color: text_style.background_color,
2639 underline: text_style.underline,
2640 });
2641
2642 if editor_mode == EditorMode::Full {
2643 // Line wrap pads its contents with fake whitespaces,
2644 // avoid printing them
2645 let inside_wrapped_string = line_number_layouts
2646 .get(row)
2647 .and_then(|layout| layout.as_ref())
2648 .is_none();
2649 if highlighted_chunk.is_tab {
2650 if non_whitespace_added || !inside_wrapped_string {
2651 invisibles.push(Invisible::Tab {
2652 line_start_offset: line.len(),
2653 });
2654 }
2655 } else {
2656 invisibles.extend(
2657 line_chunk
2658 .chars()
2659 .enumerate()
2660 .filter(|(_, line_char)| {
2661 let is_whitespace = line_char.is_whitespace();
2662 non_whitespace_added |= !is_whitespace;
2663 is_whitespace
2664 && (non_whitespace_added || !inside_wrapped_string)
2665 })
2666 .map(|(whitespace_index, _)| Invisible::Whitespace {
2667 line_offset: line.len() + whitespace_index,
2668 }),
2669 )
2670 }
2671 }
2672
2673 line.push_str(line_chunk);
2674 }
2675 }
2676 }
2677
2678 layouts
2679 }
2680
2681 fn draw(
2682 &self,
2683 layout: &LayoutState,
2684 row: u32,
2685 content_origin: gpui::Point<Pixels>,
2686 whitespace_setting: ShowWhitespaceSetting,
2687 selection_ranges: &[Range<DisplayPoint>],
2688 cx: &mut WindowContext,
2689 ) {
2690 let line_height = layout.position_map.line_height;
2691 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2692
2693 self.line
2694 .paint(
2695 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2696 line_height,
2697 cx,
2698 )
2699 .log_err();
2700
2701 self.draw_invisibles(
2702 &selection_ranges,
2703 layout,
2704 content_origin,
2705 line_y,
2706 row,
2707 line_height,
2708 whitespace_setting,
2709 cx,
2710 );
2711 }
2712
2713 fn draw_invisibles(
2714 &self,
2715 selection_ranges: &[Range<DisplayPoint>],
2716 layout: &LayoutState,
2717 content_origin: gpui::Point<Pixels>,
2718 line_y: Pixels,
2719 row: u32,
2720 line_height: Pixels,
2721 whitespace_setting: ShowWhitespaceSetting,
2722 cx: &mut WindowContext,
2723 ) {
2724 let allowed_invisibles_regions = match whitespace_setting {
2725 ShowWhitespaceSetting::None => return,
2726 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2727 ShowWhitespaceSetting::All => None,
2728 };
2729
2730 for invisible in &self.invisibles {
2731 let (&token_offset, invisible_symbol) = match invisible {
2732 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2733 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2734 };
2735
2736 let x_offset = self.line.x_for_index(token_offset);
2737 let invisible_offset =
2738 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2739 let origin = content_origin
2740 + gpui::point(
2741 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2742 line_y,
2743 );
2744
2745 if let Some(allowed_regions) = allowed_invisibles_regions {
2746 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2747 if !allowed_regions
2748 .iter()
2749 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2750 {
2751 continue;
2752 }
2753 }
2754 invisible_symbol.paint(origin, line_height, cx).log_err();
2755 }
2756 }
2757}
2758
2759#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2760enum Invisible {
2761 Tab { line_start_offset: usize },
2762 Whitespace { line_offset: usize },
2763}
2764
2765impl Element for EditorElement {
2766 type State = ();
2767
2768 fn request_layout(
2769 &mut self,
2770 _element_state: Option<Self::State>,
2771 cx: &mut gpui::WindowContext,
2772 ) -> (gpui::LayoutId, Self::State) {
2773 self.editor.update(cx, |editor, cx| {
2774 editor.set_style(self.style.clone(), cx);
2775
2776 let layout_id = match editor.mode {
2777 EditorMode::SingleLine => {
2778 let rem_size = cx.rem_size();
2779 let mut style = Style::default();
2780 style.size.width = relative(1.).into();
2781 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2782 cx.request_layout(&style, None)
2783 }
2784 EditorMode::AutoHeight { max_lines } => {
2785 let editor_handle = cx.view().clone();
2786 let max_line_number_width =
2787 self.max_line_number_width(&editor.snapshot(cx), cx);
2788 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2789 editor_handle
2790 .update(cx, |editor, cx| {
2791 compute_auto_height_layout(
2792 editor,
2793 max_lines,
2794 max_line_number_width,
2795 known_dimensions,
2796 cx,
2797 )
2798 })
2799 .unwrap_or_default()
2800 })
2801 }
2802 EditorMode::Full => {
2803 let mut style = Style::default();
2804 style.size.width = relative(1.).into();
2805 style.size.height = relative(1.).into();
2806 cx.request_layout(&style, None)
2807 }
2808 };
2809
2810 (layout_id, ())
2811 })
2812 }
2813
2814 fn paint(
2815 &mut self,
2816 bounds: Bounds<gpui::Pixels>,
2817 _element_state: &mut Self::State,
2818 cx: &mut gpui::WindowContext,
2819 ) {
2820 let editor = self.editor.clone();
2821
2822 cx.with_text_style(
2823 Some(gpui::TextStyleRefinement {
2824 font_size: Some(self.style.text.font_size),
2825 ..Default::default()
2826 }),
2827 |cx| {
2828 let mut layout = self.compute_layout(bounds, cx);
2829 let gutter_bounds = Bounds {
2830 origin: bounds.origin,
2831 size: layout.gutter_size,
2832 };
2833 let text_bounds = Bounds {
2834 origin: gutter_bounds.upper_right(),
2835 size: layout.text_size,
2836 };
2837
2838 let focus_handle = editor.focus_handle(cx);
2839 let key_context = self.editor.read(cx).key_context(cx);
2840 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2841 self.register_actions(cx);
2842 self.register_key_listeners(cx);
2843
2844 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2845 let input_handler =
2846 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2847 cx.handle_input(&focus_handle, input_handler);
2848
2849 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2850 if layout.gutter_size.width > Pixels::ZERO {
2851 self.paint_gutter(gutter_bounds, &mut layout, cx);
2852 }
2853 self.paint_text(text_bounds, &mut layout, cx);
2854
2855 cx.with_z_index(0, |cx| {
2856 self.paint_mouse_listeners(
2857 bounds,
2858 gutter_bounds,
2859 text_bounds,
2860 &layout,
2861 cx,
2862 );
2863 });
2864 if !layout.blocks.is_empty() {
2865 cx.with_z_index(0, |cx| {
2866 cx.with_element_id(Some("editor_blocks"), |cx| {
2867 self.paint_blocks(bounds, &mut layout, cx);
2868 });
2869 })
2870 }
2871
2872 cx.with_z_index(1, |cx| {
2873 self.paint_overlays(text_bounds, &mut layout, cx);
2874 });
2875
2876 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2877 });
2878 })
2879 },
2880 );
2881 }
2882}
2883
2884impl IntoElement for EditorElement {
2885 type Element = Self;
2886
2887 fn element_id(&self) -> Option<gpui::ElementId> {
2888 self.editor.element_id()
2889 }
2890
2891 fn into_element(self) -> Self::Element {
2892 self
2893 }
2894}
2895
2896type BufferRow = u32;
2897
2898pub struct LayoutState {
2899 position_map: Arc<PositionMap>,
2900 gutter_size: Size<Pixels>,
2901 gutter_padding: Pixels,
2902 gutter_margin: Pixels,
2903 text_size: gpui::Size<Pixels>,
2904 mode: EditorMode,
2905 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2906 visible_anchor_range: Range<Anchor>,
2907 visible_display_row_range: Range<u32>,
2908 active_rows: BTreeMap<u32, bool>,
2909 highlighted_rows: Option<Range<u32>>,
2910 line_numbers: Vec<Option<ShapedLine>>,
2911 display_hunks: Vec<DisplayDiffHunk>,
2912 blocks: Vec<BlockLayout>,
2913 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2914 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2915 scrollbar_row_range: Range<f32>,
2916 show_scrollbars: bool,
2917 is_singleton: bool,
2918 max_row: u32,
2919 context_menu: Option<(DisplayPoint, AnyElement)>,
2920 code_actions_indicator: Option<CodeActionsIndicator>,
2921 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2922 fold_indicators: Vec<Option<IconButton>>,
2923 tab_invisible: ShapedLine,
2924 space_invisible: ShapedLine,
2925}
2926
2927struct CodeActionsIndicator {
2928 row: u32,
2929 button: IconButton,
2930}
2931
2932struct PositionMap {
2933 size: Size<Pixels>,
2934 line_height: Pixels,
2935 scroll_position: gpui::Point<Pixels>,
2936 scroll_max: gpui::Point<f32>,
2937 em_width: Pixels,
2938 em_advance: Pixels,
2939 line_layouts: Vec<LineWithInvisibles>,
2940 snapshot: EditorSnapshot,
2941}
2942
2943#[derive(Debug, Copy, Clone)]
2944pub struct PointForPosition {
2945 pub previous_valid: DisplayPoint,
2946 pub next_valid: DisplayPoint,
2947 pub exact_unclipped: DisplayPoint,
2948 pub column_overshoot_after_line_end: u32,
2949}
2950
2951impl PointForPosition {
2952 #[cfg(test)]
2953 pub fn valid(valid: DisplayPoint) -> Self {
2954 Self {
2955 previous_valid: valid,
2956 next_valid: valid,
2957 exact_unclipped: valid,
2958 column_overshoot_after_line_end: 0,
2959 }
2960 }
2961
2962 pub fn as_valid(&self) -> Option<DisplayPoint> {
2963 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2964 Some(self.previous_valid)
2965 } else {
2966 None
2967 }
2968 }
2969}
2970
2971impl PositionMap {
2972 fn point_for_position(
2973 &self,
2974 text_bounds: Bounds<Pixels>,
2975 position: gpui::Point<Pixels>,
2976 ) -> PointForPosition {
2977 let scroll_position = self.snapshot.scroll_position();
2978 let position = position - text_bounds.origin;
2979 let y = position.y.max(px(0.)).min(self.size.height);
2980 let x = position.x + (scroll_position.x * self.em_width);
2981 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2982
2983 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2984 .line_layouts
2985 .get(row as usize - scroll_position.y as usize)
2986 .map(|&LineWithInvisibles { ref line, .. }| line)
2987 {
2988 if let Some(ix) = line.index_for_x(x) {
2989 (ix as u32, px(0.))
2990 } else {
2991 (line.len as u32, px(0.).max(x - line.width))
2992 }
2993 } else {
2994 (0, x)
2995 };
2996
2997 let mut exact_unclipped = DisplayPoint::new(row, column);
2998 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2999 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3000
3001 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3002 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3003 PointForPosition {
3004 previous_valid,
3005 next_valid,
3006 exact_unclipped,
3007 column_overshoot_after_line_end,
3008 }
3009 }
3010}
3011
3012struct BlockLayout {
3013 row: u32,
3014 element: AnyElement,
3015 available_space: Size<AvailableSpace>,
3016 style: BlockStyle,
3017}
3018
3019fn layout_line(
3020 row: u32,
3021 snapshot: &EditorSnapshot,
3022 style: &EditorStyle,
3023 cx: &WindowContext,
3024) -> Result<ShapedLine> {
3025 let mut line = snapshot.line(row);
3026
3027 if line.len() > MAX_LINE_LEN {
3028 let mut len = MAX_LINE_LEN;
3029 while !line.is_char_boundary(len) {
3030 len -= 1;
3031 }
3032
3033 line.truncate(len);
3034 }
3035
3036 cx.text_system().shape_line(
3037 line.into(),
3038 style.text.font_size.to_pixels(cx.rem_size()),
3039 &[TextRun {
3040 len: snapshot.line_len(row) as usize,
3041 font: style.text.font(),
3042 color: Hsla::default(),
3043 background_color: None,
3044 underline: None,
3045 }],
3046 )
3047}
3048
3049#[derive(Debug)]
3050pub struct Cursor {
3051 origin: gpui::Point<Pixels>,
3052 block_width: Pixels,
3053 line_height: Pixels,
3054 color: Hsla,
3055 shape: CursorShape,
3056 block_text: Option<ShapedLine>,
3057}
3058
3059impl Cursor {
3060 pub fn new(
3061 origin: gpui::Point<Pixels>,
3062 block_width: Pixels,
3063 line_height: Pixels,
3064 color: Hsla,
3065 shape: CursorShape,
3066 block_text: Option<ShapedLine>,
3067 ) -> Cursor {
3068 Cursor {
3069 origin,
3070 block_width,
3071 line_height,
3072 color,
3073 shape,
3074 block_text,
3075 }
3076 }
3077
3078 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3079 Bounds {
3080 origin: self.origin + origin,
3081 size: size(self.block_width, self.line_height),
3082 }
3083 }
3084
3085 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3086 let bounds = match self.shape {
3087 CursorShape::Bar => Bounds {
3088 origin: self.origin + origin,
3089 size: size(px(2.0), self.line_height),
3090 },
3091 CursorShape::Block | CursorShape::Hollow => Bounds {
3092 origin: self.origin + origin,
3093 size: size(self.block_width, self.line_height),
3094 },
3095 CursorShape::Underscore => Bounds {
3096 origin: self.origin
3097 + origin
3098 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3099 size: size(self.block_width, px(2.0)),
3100 },
3101 };
3102
3103 //Draw background or border quad
3104 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3105 outline(bounds, self.color)
3106 } else {
3107 fill(bounds, self.color)
3108 };
3109
3110 cx.paint_quad(cursor);
3111
3112 if let Some(block_text) = &self.block_text {
3113 block_text
3114 .paint(self.origin + origin, self.line_height, cx)
3115 .log_err();
3116 }
3117 }
3118
3119 pub fn shape(&self) -> CursorShape {
3120 self.shape
3121 }
3122}
3123
3124#[derive(Debug)]
3125pub struct HighlightedRange {
3126 pub start_y: Pixels,
3127 pub line_height: Pixels,
3128 pub lines: Vec<HighlightedRangeLine>,
3129 pub color: Hsla,
3130 pub corner_radius: Pixels,
3131}
3132
3133#[derive(Debug)]
3134pub struct HighlightedRangeLine {
3135 pub start_x: Pixels,
3136 pub end_x: Pixels,
3137}
3138
3139impl HighlightedRange {
3140 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3141 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3142 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3143 self.paint_lines(
3144 self.start_y + self.line_height,
3145 &self.lines[1..],
3146 bounds,
3147 cx,
3148 );
3149 } else {
3150 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3151 }
3152 }
3153
3154 fn paint_lines(
3155 &self,
3156 start_y: Pixels,
3157 lines: &[HighlightedRangeLine],
3158 _bounds: Bounds<Pixels>,
3159 cx: &mut WindowContext,
3160 ) {
3161 if lines.is_empty() {
3162 return;
3163 }
3164
3165 let first_line = lines.first().unwrap();
3166 let last_line = lines.last().unwrap();
3167
3168 let first_top_left = point(first_line.start_x, start_y);
3169 let first_top_right = point(first_line.end_x, start_y);
3170
3171 let curve_height = point(Pixels::ZERO, self.corner_radius);
3172 let curve_width = |start_x: Pixels, end_x: Pixels| {
3173 let max = (end_x - start_x) / 2.;
3174 let width = if max < self.corner_radius {
3175 max
3176 } else {
3177 self.corner_radius
3178 };
3179
3180 point(width, Pixels::ZERO)
3181 };
3182
3183 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3184 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3185 path.curve_to(first_top_right + curve_height, first_top_right);
3186
3187 let mut iter = lines.iter().enumerate().peekable();
3188 while let Some((ix, line)) = iter.next() {
3189 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3190
3191 if let Some((_, next_line)) = iter.peek() {
3192 let next_top_right = point(next_line.end_x, bottom_right.y);
3193
3194 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3195 Ordering::Equal => {
3196 path.line_to(bottom_right);
3197 }
3198 Ordering::Less => {
3199 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3200 path.line_to(bottom_right - curve_height);
3201 if self.corner_radius > Pixels::ZERO {
3202 path.curve_to(bottom_right - curve_width, bottom_right);
3203 }
3204 path.line_to(next_top_right + curve_width);
3205 if self.corner_radius > Pixels::ZERO {
3206 path.curve_to(next_top_right + curve_height, next_top_right);
3207 }
3208 }
3209 Ordering::Greater => {
3210 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3211 path.line_to(bottom_right - curve_height);
3212 if self.corner_radius > Pixels::ZERO {
3213 path.curve_to(bottom_right + curve_width, bottom_right);
3214 }
3215 path.line_to(next_top_right - curve_width);
3216 if self.corner_radius > Pixels::ZERO {
3217 path.curve_to(next_top_right + curve_height, next_top_right);
3218 }
3219 }
3220 }
3221 } else {
3222 let curve_width = curve_width(line.start_x, line.end_x);
3223 path.line_to(bottom_right - curve_height);
3224 if self.corner_radius > Pixels::ZERO {
3225 path.curve_to(bottom_right - curve_width, bottom_right);
3226 }
3227
3228 let bottom_left = point(line.start_x, bottom_right.y);
3229 path.line_to(bottom_left + curve_width);
3230 if self.corner_radius > Pixels::ZERO {
3231 path.curve_to(bottom_left - curve_height, bottom_left);
3232 }
3233 }
3234 }
3235
3236 if first_line.start_x > last_line.start_x {
3237 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3238 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3239 path.line_to(second_top_left + curve_height);
3240 if self.corner_radius > Pixels::ZERO {
3241 path.curve_to(second_top_left + curve_width, second_top_left);
3242 }
3243 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3244 path.line_to(first_bottom_left - curve_width);
3245 if self.corner_radius > Pixels::ZERO {
3246 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3247 }
3248 }
3249
3250 path.line_to(first_top_left + curve_height);
3251 if self.corner_radius > Pixels::ZERO {
3252 path.curve_to(first_top_left + top_curve_width, first_top_left);
3253 }
3254 path.line_to(first_top_right - top_curve_width);
3255
3256 cx.paint_path(path, self.color);
3257 }
3258}
3259
3260pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3261 (delta.pow(1.5) / 100.0).into()
3262}
3263
3264fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3265 (delta.pow(1.2) / 300.0).into()
3266}
3267
3268#[cfg(test)]
3269mod tests {
3270 use super::*;
3271 use crate::{
3272 display_map::{BlockDisposition, BlockProperties},
3273 editor_tests::{init_test, update_test_language_settings},
3274 Editor, MultiBuffer,
3275 };
3276 use gpui::TestAppContext;
3277 use language::language_settings;
3278 use log::info;
3279 use std::{num::NonZeroU32, sync::Arc};
3280 use util::test::sample_text;
3281
3282 #[gpui::test]
3283 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3284 init_test(cx, |_| {});
3285 let window = cx.add_window(|cx| {
3286 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3287 Editor::new(EditorMode::Full, buffer, None, cx)
3288 });
3289
3290 let editor = window.root(cx).unwrap();
3291 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3292 let element = EditorElement::new(&editor, style);
3293
3294 let layouts = window
3295 .update(cx, |editor, cx| {
3296 let snapshot = editor.snapshot(cx);
3297 element
3298 .shape_line_numbers(
3299 0..6,
3300 &Default::default(),
3301 DisplayPoint::new(0, 0),
3302 false,
3303 &snapshot,
3304 cx,
3305 )
3306 .0
3307 })
3308 .unwrap();
3309 assert_eq!(layouts.len(), 6);
3310
3311 let relative_rows = window
3312 .update(cx, |editor, cx| {
3313 let snapshot = editor.snapshot(cx);
3314 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3315 })
3316 .unwrap();
3317 assert_eq!(relative_rows[&0], 3);
3318 assert_eq!(relative_rows[&1], 2);
3319 assert_eq!(relative_rows[&2], 1);
3320 // current line has no relative number
3321 assert_eq!(relative_rows[&4], 1);
3322 assert_eq!(relative_rows[&5], 2);
3323
3324 // works if cursor is before screen
3325 let relative_rows = window
3326 .update(cx, |editor, cx| {
3327 let snapshot = editor.snapshot(cx);
3328
3329 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3330 })
3331 .unwrap();
3332 assert_eq!(relative_rows.len(), 3);
3333 assert_eq!(relative_rows[&3], 2);
3334 assert_eq!(relative_rows[&4], 3);
3335 assert_eq!(relative_rows[&5], 4);
3336
3337 // works if cursor is after screen
3338 let relative_rows = window
3339 .update(cx, |editor, cx| {
3340 let snapshot = editor.snapshot(cx);
3341
3342 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3343 })
3344 .unwrap();
3345 assert_eq!(relative_rows.len(), 3);
3346 assert_eq!(relative_rows[&0], 5);
3347 assert_eq!(relative_rows[&1], 4);
3348 assert_eq!(relative_rows[&2], 3);
3349 }
3350
3351 #[gpui::test]
3352 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3353 init_test(cx, |_| {});
3354
3355 let window = cx.add_window(|cx| {
3356 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3357 Editor::new(EditorMode::Full, buffer, None, cx)
3358 });
3359 let editor = window.root(cx).unwrap();
3360 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3361 let mut element = EditorElement::new(&editor, style);
3362
3363 window
3364 .update(cx, |editor, cx| {
3365 editor.cursor_shape = CursorShape::Block;
3366 editor.change_selections(None, cx, |s| {
3367 s.select_ranges([
3368 Point::new(0, 0)..Point::new(1, 0),
3369 Point::new(3, 2)..Point::new(3, 3),
3370 Point::new(5, 6)..Point::new(6, 0),
3371 ]);
3372 });
3373 })
3374 .unwrap();
3375 let state = cx
3376 .update_window(window.into(), |_, cx| {
3377 element.compute_layout(
3378 Bounds {
3379 origin: point(px(500.), px(500.)),
3380 size: size(px(500.), px(500.)),
3381 },
3382 cx,
3383 )
3384 })
3385 .unwrap();
3386
3387 assert_eq!(state.selections.len(), 1);
3388 let local_selections = &state.selections[0].1;
3389 assert_eq!(local_selections.len(), 3);
3390 // moves cursor back one line
3391 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3392 assert_eq!(
3393 local_selections[0].range,
3394 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3395 );
3396
3397 // moves cursor back one column
3398 assert_eq!(
3399 local_selections[1].range,
3400 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3401 );
3402 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3403
3404 // leaves cursor on the max point
3405 assert_eq!(
3406 local_selections[2].range,
3407 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3408 );
3409 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3410
3411 // active lines does not include 1 (even though the range of the selection does)
3412 assert_eq!(
3413 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3414 vec![0, 3, 5, 6]
3415 );
3416
3417 // multi-buffer support
3418 // in DisplayPoint co-ordinates, this is what we're dealing with:
3419 // 0: [[file
3420 // 1: header]]
3421 // 2: aaaaaa
3422 // 3: bbbbbb
3423 // 4: cccccc
3424 // 5:
3425 // 6: ...
3426 // 7: ffffff
3427 // 8: gggggg
3428 // 9: hhhhhh
3429 // 10:
3430 // 11: [[file
3431 // 12: header]]
3432 // 13: bbbbbb
3433 // 14: cccccc
3434 // 15: dddddd
3435 let window = cx.add_window(|cx| {
3436 let buffer = MultiBuffer::build_multi(
3437 [
3438 (
3439 &(sample_text(8, 6, 'a') + "\n"),
3440 vec![
3441 Point::new(0, 0)..Point::new(3, 0),
3442 Point::new(4, 0)..Point::new(7, 0),
3443 ],
3444 ),
3445 (
3446 &(sample_text(8, 6, 'a') + "\n"),
3447 vec![Point::new(1, 0)..Point::new(3, 0)],
3448 ),
3449 ],
3450 cx,
3451 );
3452 Editor::new(EditorMode::Full, buffer, None, cx)
3453 });
3454 let editor = window.root(cx).unwrap();
3455 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3456 let mut element = EditorElement::new(&editor, style);
3457 let _state = window.update(cx, |editor, cx| {
3458 editor.cursor_shape = CursorShape::Block;
3459 editor.change_selections(None, cx, |s| {
3460 s.select_display_ranges([
3461 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3462 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3463 ]);
3464 });
3465 });
3466
3467 let state = cx
3468 .update_window(window.into(), |_, cx| {
3469 element.compute_layout(
3470 Bounds {
3471 origin: point(px(500.), px(500.)),
3472 size: size(px(500.), px(500.)),
3473 },
3474 cx,
3475 )
3476 })
3477 .unwrap();
3478 assert_eq!(state.selections.len(), 1);
3479 let local_selections = &state.selections[0].1;
3480 assert_eq!(local_selections.len(), 2);
3481
3482 // moves cursor on excerpt boundary back a line
3483 // and doesn't allow selection to bleed through
3484 assert_eq!(
3485 local_selections[0].range,
3486 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3487 );
3488 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3489 // moves cursor on buffer boundary back two lines
3490 // and doesn't allow selection to bleed through
3491 assert_eq!(
3492 local_selections[1].range,
3493 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3494 );
3495 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3496 }
3497
3498 #[gpui::test]
3499 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3500 init_test(cx, |_| {});
3501
3502 let window = cx.add_window(|cx| {
3503 let buffer = MultiBuffer::build_simple("", cx);
3504 Editor::new(EditorMode::Full, buffer, None, cx)
3505 });
3506 let editor = window.root(cx).unwrap();
3507 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3508 window
3509 .update(cx, |editor, cx| {
3510 editor.set_placeholder_text("hello", cx);
3511 editor.insert_blocks(
3512 [BlockProperties {
3513 style: BlockStyle::Fixed,
3514 disposition: BlockDisposition::Above,
3515 height: 3,
3516 position: Anchor::min(),
3517 render: Arc::new(|_| div().into_any()),
3518 }],
3519 None,
3520 cx,
3521 );
3522
3523 // Blur the editor so that it displays placeholder text.
3524 cx.blur();
3525 })
3526 .unwrap();
3527
3528 let mut element = EditorElement::new(&editor, style);
3529 let state = cx
3530 .update_window(window.into(), |_, cx| {
3531 element.compute_layout(
3532 Bounds {
3533 origin: point(px(500.), px(500.)),
3534 size: size(px(500.), px(500.)),
3535 },
3536 cx,
3537 )
3538 })
3539 .unwrap();
3540 let size = state.position_map.size;
3541
3542 assert_eq!(state.position_map.line_layouts.len(), 4);
3543 assert_eq!(
3544 state
3545 .line_numbers
3546 .iter()
3547 .map(Option::is_some)
3548 .collect::<Vec<_>>(),
3549 &[false, false, false, true]
3550 );
3551
3552 // Don't panic.
3553 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3554 cx.update_window(window.into(), |_, cx| {
3555 element.paint(bounds, &mut (), cx);
3556 })
3557 .unwrap()
3558 }
3559
3560 #[gpui::test]
3561 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3562 const TAB_SIZE: u32 = 4;
3563
3564 let input_text = "\t \t|\t| a b";
3565 let expected_invisibles = vec![
3566 Invisible::Tab {
3567 line_start_offset: 0,
3568 },
3569 Invisible::Whitespace {
3570 line_offset: TAB_SIZE as usize,
3571 },
3572 Invisible::Tab {
3573 line_start_offset: TAB_SIZE as usize + 1,
3574 },
3575 Invisible::Tab {
3576 line_start_offset: TAB_SIZE as usize * 2 + 1,
3577 },
3578 Invisible::Whitespace {
3579 line_offset: TAB_SIZE as usize * 3 + 1,
3580 },
3581 Invisible::Whitespace {
3582 line_offset: TAB_SIZE as usize * 3 + 3,
3583 },
3584 ];
3585 assert_eq!(
3586 expected_invisibles.len(),
3587 input_text
3588 .chars()
3589 .filter(|initial_char| initial_char.is_whitespace())
3590 .count(),
3591 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3592 );
3593
3594 init_test(cx, |s| {
3595 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3596 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3597 });
3598
3599 let actual_invisibles =
3600 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3601
3602 assert_eq!(expected_invisibles, actual_invisibles);
3603 }
3604
3605 #[gpui::test]
3606 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3607 init_test(cx, |s| {
3608 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3609 s.defaults.tab_size = NonZeroU32::new(4);
3610 });
3611
3612 for editor_mode_without_invisibles in [
3613 EditorMode::SingleLine,
3614 EditorMode::AutoHeight { max_lines: 100 },
3615 ] {
3616 let invisibles = collect_invisibles_from_new_editor(
3617 cx,
3618 editor_mode_without_invisibles,
3619 "\t\t\t| | a b",
3620 px(500.0),
3621 );
3622 assert!(invisibles.is_empty(),
3623 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3624 }
3625 }
3626
3627 #[gpui::test]
3628 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3629 let tab_size = 4;
3630 let input_text = "a\tbcd ".repeat(9);
3631 let repeated_invisibles = [
3632 Invisible::Tab {
3633 line_start_offset: 1,
3634 },
3635 Invisible::Whitespace {
3636 line_offset: tab_size as usize + 3,
3637 },
3638 Invisible::Whitespace {
3639 line_offset: tab_size as usize + 4,
3640 },
3641 Invisible::Whitespace {
3642 line_offset: tab_size as usize + 5,
3643 },
3644 ];
3645 let expected_invisibles = std::iter::once(repeated_invisibles)
3646 .cycle()
3647 .take(9)
3648 .flatten()
3649 .collect::<Vec<_>>();
3650 assert_eq!(
3651 expected_invisibles.len(),
3652 input_text
3653 .chars()
3654 .filter(|initial_char| initial_char.is_whitespace())
3655 .count(),
3656 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3657 );
3658 info!("Expected invisibles: {expected_invisibles:?}");
3659
3660 init_test(cx, |_| {});
3661
3662 // Put the same string with repeating whitespace pattern into editors of various size,
3663 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3664 let resize_step = 10.0;
3665 let mut editor_width = 200.0;
3666 while editor_width <= 1000.0 {
3667 update_test_language_settings(cx, |s| {
3668 s.defaults.tab_size = NonZeroU32::new(tab_size);
3669 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3670 s.defaults.preferred_line_length = Some(editor_width as u32);
3671 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3672 });
3673
3674 let actual_invisibles = collect_invisibles_from_new_editor(
3675 cx,
3676 EditorMode::Full,
3677 &input_text,
3678 px(editor_width),
3679 );
3680
3681 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3682 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3683 let mut i = 0;
3684 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3685 i = actual_index;
3686 match expected_invisibles.get(i) {
3687 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3688 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3689 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3690 _ => {
3691 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3692 }
3693 },
3694 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3695 }
3696 }
3697 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3698 assert!(
3699 missing_expected_invisibles.is_empty(),
3700 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3701 );
3702
3703 editor_width += resize_step;
3704 }
3705 }
3706
3707 fn collect_invisibles_from_new_editor(
3708 cx: &mut TestAppContext,
3709 editor_mode: EditorMode,
3710 input_text: &str,
3711 editor_width: Pixels,
3712 ) -> Vec<Invisible> {
3713 info!(
3714 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3715 editor_width.0
3716 );
3717 let window = cx.add_window(|cx| {
3718 let buffer = MultiBuffer::build_simple(&input_text, cx);
3719 Editor::new(editor_mode, buffer, None, cx)
3720 });
3721 let editor = window.root(cx).unwrap();
3722 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3723 let mut element = EditorElement::new(&editor, style);
3724 window
3725 .update(cx, |editor, cx| {
3726 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3727 editor.set_wrap_width(Some(editor_width), cx);
3728 })
3729 .unwrap();
3730 let layout_state = cx
3731 .update_window(window.into(), |_, cx| {
3732 element.compute_layout(
3733 Bounds {
3734 origin: point(px(500.), px(500.)),
3735 size: size(px(500.), px(500.)),
3736 },
3737 cx,
3738 )
3739 })
3740 .unwrap();
3741
3742 layout_state
3743 .position_map
3744 .line_layouts
3745 .iter()
3746 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3747 .flatten()
3748 .cloned()
3749 .collect()
3750 }
3751}
3752
3753pub fn register_action<T: Action>(
3754 view: &View<Editor>,
3755 cx: &mut WindowContext,
3756 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3757) {
3758 let view = view.clone();
3759 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3760 let action = action.downcast_ref().unwrap();
3761 if phase == DispatchPhase::Bubble {
3762 view.update(cx, |editor, cx| {
3763 listener(editor, action, cx);
3764 })
3765 }
3766 })
3767}
3768
3769fn compute_auto_height_layout(
3770 editor: &mut Editor,
3771 max_lines: usize,
3772 max_line_number_width: Pixels,
3773 known_dimensions: Size<Option<Pixels>>,
3774 cx: &mut ViewContext<Editor>,
3775) -> Option<Size<Pixels>> {
3776 let width = known_dimensions.width?;
3777 if let Some(height) = known_dimensions.height {
3778 return Some(size(width, height));
3779 }
3780
3781 let style = editor.style.as_ref().unwrap();
3782 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3783 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3784 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3785 let em_width = cx
3786 .text_system()
3787 .typographic_bounds(font_id, font_size, 'm')
3788 .unwrap()
3789 .size
3790 .width;
3791
3792 let mut snapshot = editor.snapshot(cx);
3793 let gutter_width;
3794 let gutter_margin;
3795 if snapshot.show_gutter {
3796 let descent = cx.text_system().descent(font_id, font_size);
3797 let gutter_padding_factor = 3.5;
3798 let gutter_padding = (em_width * gutter_padding_factor).round();
3799 gutter_width = max_line_number_width + gutter_padding * 2.0;
3800 gutter_margin = -descent;
3801 } else {
3802 gutter_width = Pixels::ZERO;
3803 gutter_margin = Pixels::ZERO;
3804 };
3805
3806 editor.gutter_width = gutter_width;
3807 let text_width = width - gutter_width;
3808 let overscroll = size(em_width, px(0.));
3809
3810 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3811 if editor.set_wrap_width(Some(editor_width), cx) {
3812 snapshot = editor.snapshot(cx);
3813 }
3814
3815 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3816 let height = scroll_height
3817 .max(line_height)
3818 .min(line_height * max_lines as f32);
3819
3820 Some(size(width, height))
3821}