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, Label, 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 selections.push((style.local_player, layouts));
1905 }
1906
1907 if let Some(collaboration_hub) = &editor.collaboration_hub {
1908 // When following someone, render the local selections in their color.
1909 if let Some(leader_id) = editor.leader_peer_id {
1910 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1911 if let Some(participant_index) = collaboration_hub
1912 .user_participant_indices(cx)
1913 .get(&collaborator.user_id)
1914 {
1915 if let Some((local_selection_style, _)) = selections.first_mut() {
1916 *local_selection_style = cx
1917 .theme()
1918 .players()
1919 .color_for_participant(participant_index.0);
1920 }
1921 }
1922 }
1923 }
1924
1925 let mut remote_selections = HashMap::default();
1926 for selection in snapshot.remote_selections_in_range(
1927 &(start_anchor..end_anchor),
1928 collaboration_hub.as_ref(),
1929 cx,
1930 ) {
1931 let selection_style = if let Some(participant_index) = selection.participant_index {
1932 cx.theme()
1933 .players()
1934 .color_for_participant(participant_index.0)
1935 } else {
1936 cx.theme().players().absent()
1937 };
1938
1939 // Don't re-render the leader's selections, since the local selections
1940 // match theirs.
1941 if Some(selection.peer_id) == editor.leader_peer_id {
1942 continue;
1943 }
1944
1945 remote_selections
1946 .entry(selection.replica_id)
1947 .or_insert((selection_style, Vec::new()))
1948 .1
1949 .push(SelectionLayout::new(
1950 selection.selection,
1951 selection.line_mode,
1952 selection.cursor_shape,
1953 &snapshot.display_snapshot,
1954 false,
1955 false,
1956 ));
1957 }
1958
1959 selections.extend(remote_selections.into_values());
1960 }
1961
1962 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1963 let show_scrollbars = match scrollbar_settings.show {
1964 ShowScrollbar::Auto => {
1965 // Git
1966 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1967 ||
1968 // Selections
1969 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1970 // Scrollmanager
1971 || editor.scroll_manager.scrollbars_visible()
1972 }
1973 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1974 ShowScrollbar::Always => true,
1975 ShowScrollbar::Never => false,
1976 };
1977
1978 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1979 let newest = editor.selections.newest::<Point>(cx);
1980 SelectionLayout::new(
1981 newest,
1982 editor.selections.line_mode,
1983 editor.cursor_shape,
1984 &snapshot.display_snapshot,
1985 true,
1986 true,
1987 )
1988 .head
1989 });
1990
1991 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1992 start_row..end_row,
1993 &active_rows,
1994 head_for_relative,
1995 is_singleton,
1996 &snapshot,
1997 cx,
1998 );
1999
2000 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2001
2002 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2003
2004 let mut max_visible_line_width = Pixels::ZERO;
2005 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2006 for line_with_invisibles in &line_layouts {
2007 if line_with_invisibles.line.width > max_visible_line_width {
2008 max_visible_line_width = line_with_invisibles.line.width;
2009 }
2010 }
2011
2012 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2013 .unwrap()
2014 .width;
2015 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2016
2017 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2018 self.layout_blocks(
2019 start_row..end_row,
2020 &snapshot,
2021 bounds.size.width,
2022 scroll_width,
2023 gutter_padding,
2024 gutter_width,
2025 em_width,
2026 gutter_width + gutter_margin,
2027 line_height,
2028 &style,
2029 &line_layouts,
2030 editor,
2031 cx,
2032 )
2033 });
2034
2035 let scroll_max = point(
2036 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2037 max_row as f32,
2038 );
2039
2040 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2041
2042 let autoscrolled = if autoscroll_horizontally {
2043 editor.autoscroll_horizontally(
2044 start_row,
2045 text_size.width,
2046 scroll_width,
2047 em_width,
2048 &line_layouts,
2049 cx,
2050 )
2051 } else {
2052 false
2053 };
2054
2055 if clamped || autoscrolled {
2056 snapshot = editor.snapshot(cx);
2057 }
2058
2059 let mut context_menu = None;
2060 let mut code_actions_indicator = None;
2061 if let Some(newest_selection_head) = newest_selection_head {
2062 if (start_row..end_row).contains(&newest_selection_head.row()) {
2063 if editor.context_menu_visible() {
2064 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2065 context_menu =
2066 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2067 }
2068
2069 let active = matches!(
2070 editor.context_menu.read().as_ref(),
2071 Some(crate::ContextMenu::CodeActions(_))
2072 );
2073
2074 code_actions_indicator = editor
2075 .render_code_actions_indicator(&style, active, cx)
2076 .map(|element| CodeActionsIndicator {
2077 row: newest_selection_head.row(),
2078 button: element,
2079 });
2080 }
2081 }
2082
2083 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2084 let max_size = size(
2085 (120. * em_width) // Default size
2086 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2087 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2088 (16. * line_height) // Default size
2089 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2090 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2091 );
2092
2093 let hover = editor.hover_state.render(
2094 &snapshot,
2095 &style,
2096 visible_rows,
2097 max_size,
2098 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2099 cx,
2100 );
2101
2102 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2103 editor.render_fold_indicators(
2104 fold_statuses,
2105 &style,
2106 editor.gutter_hovered,
2107 line_height,
2108 gutter_margin,
2109 cx,
2110 )
2111 });
2112
2113 let invisible_symbol_font_size = font_size / 2.;
2114 let tab_invisible = cx
2115 .text_system()
2116 .shape_line(
2117 "→".into(),
2118 invisible_symbol_font_size,
2119 &[TextRun {
2120 len: "→".len(),
2121 font: self.style.text.font(),
2122 color: cx.theme().colors().editor_invisible,
2123 background_color: None,
2124 underline: None,
2125 }],
2126 )
2127 .unwrap();
2128 let space_invisible = cx
2129 .text_system()
2130 .shape_line(
2131 "•".into(),
2132 invisible_symbol_font_size,
2133 &[TextRun {
2134 len: "•".len(),
2135 font: self.style.text.font(),
2136 color: cx.theme().colors().editor_invisible,
2137 background_color: None,
2138 underline: None,
2139 }],
2140 )
2141 .unwrap();
2142
2143 LayoutState {
2144 mode: snapshot.mode,
2145 position_map: Arc::new(PositionMap {
2146 size: bounds.size,
2147 scroll_position: point(
2148 scroll_position.x * em_width,
2149 scroll_position.y * line_height,
2150 ),
2151 scroll_max,
2152 line_layouts,
2153 line_height,
2154 em_width,
2155 em_advance,
2156 snapshot,
2157 }),
2158 visible_anchor_range: start_anchor..end_anchor,
2159 visible_display_row_range: start_row..end_row,
2160 wrap_guides,
2161 gutter_size,
2162 gutter_padding,
2163 text_size,
2164 scrollbar_row_range,
2165 show_scrollbars,
2166 is_singleton,
2167 max_row,
2168 gutter_margin,
2169 active_rows,
2170 highlighted_rows,
2171 highlighted_ranges,
2172 line_numbers,
2173 display_hunks,
2174 blocks,
2175 selections,
2176 context_menu,
2177 code_actions_indicator,
2178 fold_indicators,
2179 tab_invisible,
2180 space_invisible,
2181 hover_popovers: hover,
2182 }
2183 })
2184 }
2185
2186 #[allow(clippy::too_many_arguments)]
2187 fn layout_blocks(
2188 &self,
2189 rows: Range<u32>,
2190 snapshot: &EditorSnapshot,
2191 editor_width: Pixels,
2192 scroll_width: Pixels,
2193 gutter_padding: Pixels,
2194 gutter_width: Pixels,
2195 em_width: Pixels,
2196 text_x: Pixels,
2197 line_height: Pixels,
2198 style: &EditorStyle,
2199 line_layouts: &[LineWithInvisibles],
2200 editor: &mut Editor,
2201 cx: &mut ViewContext<Editor>,
2202 ) -> (Pixels, Vec<BlockLayout>) {
2203 let mut block_id = 0;
2204 let (fixed_blocks, non_fixed_blocks) = snapshot
2205 .blocks_in_range(rows.clone())
2206 .partition::<Vec<_>, _>(|(_, block)| match block {
2207 TransformBlock::ExcerptHeader { .. } => false,
2208 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2209 });
2210
2211 let render_block = |block: &TransformBlock,
2212 available_space: Size<AvailableSpace>,
2213 block_id: usize,
2214 editor: &mut Editor,
2215 cx: &mut ViewContext<Editor>| {
2216 let mut element = match block {
2217 TransformBlock::Custom(block) => {
2218 let align_to = block
2219 .position()
2220 .to_point(&snapshot.buffer_snapshot)
2221 .to_display_point(snapshot);
2222 let anchor_x = text_x
2223 + if rows.contains(&align_to.row()) {
2224 line_layouts[(align_to.row() - rows.start) as usize]
2225 .line
2226 .x_for_index(align_to.column() as usize)
2227 } else {
2228 layout_line(align_to.row(), snapshot, style, cx)
2229 .unwrap()
2230 .x_for_index(align_to.column() as usize)
2231 };
2232
2233 block.render(&mut BlockContext {
2234 view_context: cx,
2235 anchor_x,
2236 gutter_padding,
2237 line_height,
2238 gutter_width,
2239 em_width,
2240 block_id,
2241 editor_style: &self.style,
2242 })
2243 }
2244
2245 TransformBlock::ExcerptHeader {
2246 buffer,
2247 range,
2248 starts_new_buffer,
2249 ..
2250 } => {
2251 let include_root = editor
2252 .project
2253 .as_ref()
2254 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2255 .unwrap_or_default();
2256
2257 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2258 let jump_path = ProjectPath {
2259 worktree_id: file.worktree_id(cx),
2260 path: file.path.clone(),
2261 };
2262 let jump_anchor = range
2263 .primary
2264 .as_ref()
2265 .map_or(range.context.start, |primary| primary.start);
2266 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2267
2268 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2269 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2270 });
2271
2272 jump_handler
2273 });
2274
2275 let element = if *starts_new_buffer {
2276 let path = buffer.resolve_file_path(cx, include_root);
2277 let mut filename = None;
2278 let mut parent_path = None;
2279 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2280 if let Some(path) = path {
2281 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2282 parent_path = path
2283 .parent()
2284 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2285 }
2286
2287 div()
2288 .id(("path header container", block_id))
2289 .size_full()
2290 .p_1p5()
2291 .child(
2292 h_stack()
2293 .id("path header block")
2294 .py_1p5()
2295 .pl_3()
2296 .pr_2()
2297 .rounded_lg()
2298 .shadow_md()
2299 .border()
2300 .border_color(cx.theme().colors().border)
2301 .bg(cx.theme().colors().editor_subheader_background)
2302 .justify_between()
2303 .hover(|style| style.bg(cx.theme().colors().element_hover))
2304 .child(
2305 h_stack().gap_3().child(
2306 h_stack()
2307 .gap_2()
2308 .child(Label::new(
2309 filename
2310 .map(SharedString::from)
2311 .unwrap_or_else(|| "untitled".into()),
2312 ))
2313 .when_some(parent_path, |then, path| {
2314 then.child(Label::new(path).color(Color::Muted))
2315 }),
2316 ),
2317 )
2318 .when_some(jump_handler, |this, jump_handler| {
2319 this.cursor_pointer()
2320 .tooltip(|cx| {
2321 Tooltip::for_action(
2322 "Jump to Buffer",
2323 &OpenExcerpts,
2324 cx,
2325 )
2326 })
2327 .on_mouse_down(MouseButton::Left, |_, cx| {
2328 cx.stop_propagation()
2329 })
2330 .on_click(jump_handler)
2331 }),
2332 )
2333 } else {
2334 h_stack()
2335 .id(("collapsed context", block_id))
2336 .size_full()
2337 .gap(gutter_padding)
2338 .child(
2339 h_stack()
2340 .justify_end()
2341 .flex_none()
2342 .w(gutter_width - gutter_padding)
2343 .h_full()
2344 .text_buffer(cx)
2345 .text_color(cx.theme().colors().editor_line_number)
2346 .child("..."),
2347 )
2348 .map(|this| {
2349 if let Some(jump_handler) = jump_handler {
2350 this.child(
2351 ButtonLike::new("jump to collapsed context")
2352 .style(ButtonStyle::Transparent)
2353 .full_width()
2354 .on_click(jump_handler)
2355 .tooltip(|cx| {
2356 Tooltip::for_action(
2357 "Jump to Buffer",
2358 &OpenExcerpts,
2359 cx,
2360 )
2361 })
2362 .child(
2363 div()
2364 .h_px()
2365 .w_full()
2366 .bg(cx.theme().colors().border_variant)
2367 .group_hover("", |style| {
2368 style.bg(cx.theme().colors().border)
2369 }),
2370 ),
2371 )
2372 } else {
2373 this.child(div().size_full().bg(gpui::green()))
2374 }
2375 })
2376 // .child("⋯")
2377 // .children(jump_icon) // .p_x(gutter_padding)
2378 };
2379 element.into_any()
2380 }
2381 };
2382
2383 let size = element.measure(available_space, cx);
2384 (element, size)
2385 };
2386
2387 let mut fixed_block_max_width = Pixels::ZERO;
2388 let mut blocks = Vec::new();
2389 for (row, block) in fixed_blocks {
2390 let available_space = size(
2391 AvailableSpace::MinContent,
2392 AvailableSpace::Definite(block.height() as f32 * line_height),
2393 );
2394 let (element, element_size) =
2395 render_block(block, available_space, block_id, editor, cx);
2396 block_id += 1;
2397 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2398 blocks.push(BlockLayout {
2399 row,
2400 element,
2401 available_space,
2402 style: BlockStyle::Fixed,
2403 });
2404 }
2405 for (row, block) in non_fixed_blocks {
2406 let style = match block {
2407 TransformBlock::Custom(block) => block.style(),
2408 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2409 };
2410 let width = match style {
2411 BlockStyle::Sticky => editor_width,
2412 BlockStyle::Flex => editor_width
2413 .max(fixed_block_max_width)
2414 .max(gutter_width + scroll_width),
2415 BlockStyle::Fixed => unreachable!(),
2416 };
2417 let available_space = size(
2418 AvailableSpace::Definite(width),
2419 AvailableSpace::Definite(block.height() as f32 * line_height),
2420 );
2421 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2422 block_id += 1;
2423 blocks.push(BlockLayout {
2424 row,
2425 element,
2426 available_space,
2427 style,
2428 });
2429 }
2430 (
2431 scroll_width.max(fixed_block_max_width - gutter_width),
2432 blocks,
2433 )
2434 }
2435
2436 fn paint_mouse_listeners(
2437 &mut self,
2438 bounds: Bounds<Pixels>,
2439 gutter_bounds: Bounds<Pixels>,
2440 text_bounds: Bounds<Pixels>,
2441 layout: &LayoutState,
2442 cx: &mut WindowContext,
2443 ) {
2444 let interactive_bounds = InteractiveBounds {
2445 bounds: bounds.intersect(&cx.content_mask().bounds),
2446 stacking_order: cx.stacking_order().clone(),
2447 };
2448
2449 cx.on_mouse_event({
2450 let position_map = layout.position_map.clone();
2451 let editor = self.editor.clone();
2452 let interactive_bounds = interactive_bounds.clone();
2453
2454 move |event: &ScrollWheelEvent, phase, cx| {
2455 if phase == DispatchPhase::Bubble
2456 && interactive_bounds.visibly_contains(&event.position, cx)
2457 {
2458 editor.update(cx, |editor, cx| {
2459 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2460 });
2461 }
2462 }
2463 });
2464
2465 cx.on_mouse_event({
2466 let position_map = layout.position_map.clone();
2467 let editor = self.editor.clone();
2468 let stacking_order = cx.stacking_order().clone();
2469 let interactive_bounds = interactive_bounds.clone();
2470
2471 move |event: &MouseDownEvent, phase, cx| {
2472 if phase == DispatchPhase::Bubble
2473 && interactive_bounds.visibly_contains(&event.position, cx)
2474 {
2475 match event.button {
2476 MouseButton::Left => editor.update(cx, |editor, cx| {
2477 Self::mouse_left_down(
2478 editor,
2479 event,
2480 &position_map,
2481 text_bounds,
2482 gutter_bounds,
2483 &stacking_order,
2484 cx,
2485 );
2486 }),
2487 MouseButton::Right => editor.update(cx, |editor, cx| {
2488 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2489 }),
2490 _ => {}
2491 };
2492 }
2493 }
2494 });
2495
2496 cx.on_mouse_event({
2497 let position_map = layout.position_map.clone();
2498 let editor = self.editor.clone();
2499 let stacking_order = cx.stacking_order().clone();
2500 let interactive_bounds = interactive_bounds.clone();
2501
2502 move |event: &MouseUpEvent, phase, cx| {
2503 if phase == DispatchPhase::Bubble
2504 && interactive_bounds.visibly_contains(&event.position, cx)
2505 {
2506 editor.update(cx, |editor, cx| {
2507 Self::mouse_up(
2508 editor,
2509 event,
2510 &position_map,
2511 text_bounds,
2512 &stacking_order,
2513 cx,
2514 )
2515 });
2516 }
2517 }
2518 });
2519 cx.on_mouse_event({
2520 let position_map = layout.position_map.clone();
2521 let editor = self.editor.clone();
2522 let stacking_order = cx.stacking_order().clone();
2523
2524 move |event: &MouseMoveEvent, phase, cx| {
2525 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2526
2527 if phase == DispatchPhase::Bubble {
2528 editor.update(cx, |editor, cx| {
2529 if event.pressed_button == Some(MouseButton::Left) {
2530 Self::mouse_dragged(
2531 editor,
2532 event,
2533 &position_map,
2534 text_bounds,
2535 gutter_bounds,
2536 &stacking_order,
2537 cx,
2538 )
2539 }
2540
2541 if interactive_bounds.visibly_contains(&event.position, cx) {
2542 Self::mouse_moved(
2543 editor,
2544 event,
2545 &position_map,
2546 text_bounds,
2547 gutter_bounds,
2548 &stacking_order,
2549 cx,
2550 )
2551 }
2552 });
2553 }
2554 }
2555 });
2556 }
2557}
2558
2559#[derive(Debug)]
2560pub struct LineWithInvisibles {
2561 pub line: ShapedLine,
2562 invisibles: Vec<Invisible>,
2563}
2564
2565impl LineWithInvisibles {
2566 fn from_chunks<'a>(
2567 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2568 text_style: &TextStyle,
2569 max_line_len: usize,
2570 max_line_count: usize,
2571 line_number_layouts: &[Option<ShapedLine>],
2572 editor_mode: EditorMode,
2573 cx: &WindowContext,
2574 ) -> Vec<Self> {
2575 let mut layouts = Vec::with_capacity(max_line_count);
2576 let mut line = String::new();
2577 let mut invisibles = Vec::new();
2578 let mut styles = Vec::new();
2579 let mut non_whitespace_added = false;
2580 let mut row = 0;
2581 let mut line_exceeded_max_len = false;
2582 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2583
2584 for highlighted_chunk in chunks.chain([HighlightedChunk {
2585 chunk: "\n",
2586 style: None,
2587 is_tab: false,
2588 }]) {
2589 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2590 if ix > 0 {
2591 let shaped_line = cx
2592 .text_system()
2593 .shape_line(line.clone().into(), font_size, &styles)
2594 .unwrap();
2595 layouts.push(Self {
2596 line: shaped_line,
2597 invisibles: invisibles.drain(..).collect(),
2598 });
2599
2600 line.clear();
2601 styles.clear();
2602 row += 1;
2603 line_exceeded_max_len = false;
2604 non_whitespace_added = false;
2605 if row == max_line_count {
2606 return layouts;
2607 }
2608 }
2609
2610 if !line_chunk.is_empty() && !line_exceeded_max_len {
2611 let text_style = if let Some(style) = highlighted_chunk.style {
2612 Cow::Owned(text_style.clone().highlight(style))
2613 } else {
2614 Cow::Borrowed(text_style)
2615 };
2616
2617 if line.len() + line_chunk.len() > max_line_len {
2618 let mut chunk_len = max_line_len - line.len();
2619 while !line_chunk.is_char_boundary(chunk_len) {
2620 chunk_len -= 1;
2621 }
2622 line_chunk = &line_chunk[..chunk_len];
2623 line_exceeded_max_len = true;
2624 }
2625
2626 styles.push(TextRun {
2627 len: line_chunk.len(),
2628 font: text_style.font(),
2629 color: text_style.color,
2630 background_color: text_style.background_color,
2631 underline: text_style.underline,
2632 });
2633
2634 if editor_mode == EditorMode::Full {
2635 // Line wrap pads its contents with fake whitespaces,
2636 // avoid printing them
2637 let inside_wrapped_string = line_number_layouts
2638 .get(row)
2639 .and_then(|layout| layout.as_ref())
2640 .is_none();
2641 if highlighted_chunk.is_tab {
2642 if non_whitespace_added || !inside_wrapped_string {
2643 invisibles.push(Invisible::Tab {
2644 line_start_offset: line.len(),
2645 });
2646 }
2647 } else {
2648 invisibles.extend(
2649 line_chunk
2650 .chars()
2651 .enumerate()
2652 .filter(|(_, line_char)| {
2653 let is_whitespace = line_char.is_whitespace();
2654 non_whitespace_added |= !is_whitespace;
2655 is_whitespace
2656 && (non_whitespace_added || !inside_wrapped_string)
2657 })
2658 .map(|(whitespace_index, _)| Invisible::Whitespace {
2659 line_offset: line.len() + whitespace_index,
2660 }),
2661 )
2662 }
2663 }
2664
2665 line.push_str(line_chunk);
2666 }
2667 }
2668 }
2669
2670 layouts
2671 }
2672
2673 fn draw(
2674 &self,
2675 layout: &LayoutState,
2676 row: u32,
2677 content_origin: gpui::Point<Pixels>,
2678 whitespace_setting: ShowWhitespaceSetting,
2679 selection_ranges: &[Range<DisplayPoint>],
2680 cx: &mut WindowContext,
2681 ) {
2682 let line_height = layout.position_map.line_height;
2683 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2684
2685 self.line
2686 .paint(
2687 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2688 line_height,
2689 cx,
2690 )
2691 .log_err();
2692
2693 self.draw_invisibles(
2694 &selection_ranges,
2695 layout,
2696 content_origin,
2697 line_y,
2698 row,
2699 line_height,
2700 whitespace_setting,
2701 cx,
2702 );
2703 }
2704
2705 fn draw_invisibles(
2706 &self,
2707 selection_ranges: &[Range<DisplayPoint>],
2708 layout: &LayoutState,
2709 content_origin: gpui::Point<Pixels>,
2710 line_y: Pixels,
2711 row: u32,
2712 line_height: Pixels,
2713 whitespace_setting: ShowWhitespaceSetting,
2714 cx: &mut WindowContext,
2715 ) {
2716 let allowed_invisibles_regions = match whitespace_setting {
2717 ShowWhitespaceSetting::None => return,
2718 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2719 ShowWhitespaceSetting::All => None,
2720 };
2721
2722 for invisible in &self.invisibles {
2723 let (&token_offset, invisible_symbol) = match invisible {
2724 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2725 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2726 };
2727
2728 let x_offset = self.line.x_for_index(token_offset);
2729 let invisible_offset =
2730 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2731 let origin = content_origin
2732 + gpui::point(
2733 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2734 line_y,
2735 );
2736
2737 if let Some(allowed_regions) = allowed_invisibles_regions {
2738 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2739 if !allowed_regions
2740 .iter()
2741 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2742 {
2743 continue;
2744 }
2745 }
2746 invisible_symbol.paint(origin, line_height, cx).log_err();
2747 }
2748 }
2749}
2750
2751#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2752enum Invisible {
2753 Tab { line_start_offset: usize },
2754 Whitespace { line_offset: usize },
2755}
2756
2757impl Element for EditorElement {
2758 type State = ();
2759
2760 fn request_layout(
2761 &mut self,
2762 _element_state: Option<Self::State>,
2763 cx: &mut gpui::WindowContext,
2764 ) -> (gpui::LayoutId, Self::State) {
2765 self.editor.update(cx, |editor, cx| {
2766 editor.set_style(self.style.clone(), cx);
2767
2768 let layout_id = match editor.mode {
2769 EditorMode::SingleLine => {
2770 let rem_size = cx.rem_size();
2771 let mut style = Style::default();
2772 style.size.width = relative(1.).into();
2773 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2774 cx.request_layout(&style, None)
2775 }
2776 EditorMode::AutoHeight { max_lines } => {
2777 let editor_handle = cx.view().clone();
2778 let max_line_number_width =
2779 self.max_line_number_width(&editor.snapshot(cx), cx);
2780 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2781 editor_handle
2782 .update(cx, |editor, cx| {
2783 compute_auto_height_layout(
2784 editor,
2785 max_lines,
2786 max_line_number_width,
2787 known_dimensions,
2788 cx,
2789 )
2790 })
2791 .unwrap_or_default()
2792 })
2793 }
2794 EditorMode::Full => {
2795 let mut style = Style::default();
2796 style.size.width = relative(1.).into();
2797 style.size.height = relative(1.).into();
2798 cx.request_layout(&style, None)
2799 }
2800 };
2801
2802 (layout_id, ())
2803 })
2804 }
2805
2806 fn paint(
2807 &mut self,
2808 bounds: Bounds<gpui::Pixels>,
2809 _element_state: &mut Self::State,
2810 cx: &mut gpui::WindowContext,
2811 ) {
2812 let editor = self.editor.clone();
2813
2814 cx.with_text_style(
2815 Some(gpui::TextStyleRefinement {
2816 font_size: Some(self.style.text.font_size),
2817 ..Default::default()
2818 }),
2819 |cx| {
2820 let mut layout = self.compute_layout(bounds, cx);
2821 let gutter_bounds = Bounds {
2822 origin: bounds.origin,
2823 size: layout.gutter_size,
2824 };
2825 let text_bounds = Bounds {
2826 origin: gutter_bounds.upper_right(),
2827 size: layout.text_size,
2828 };
2829
2830 let focus_handle = editor.focus_handle(cx);
2831 let key_context = self.editor.read(cx).key_context(cx);
2832 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2833 self.register_actions(cx);
2834 self.register_key_listeners(cx);
2835
2836 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2837 let input_handler =
2838 ElementInputHandler::new(bounds, self.editor.clone(), cx);
2839 cx.handle_input(&focus_handle, input_handler);
2840
2841 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2842 if layout.gutter_size.width > Pixels::ZERO {
2843 self.paint_gutter(gutter_bounds, &mut layout, cx);
2844 }
2845 self.paint_text(text_bounds, &mut layout, cx);
2846
2847 cx.with_z_index(0, |cx| {
2848 self.paint_mouse_listeners(
2849 bounds,
2850 gutter_bounds,
2851 text_bounds,
2852 &layout,
2853 cx,
2854 );
2855 });
2856 if !layout.blocks.is_empty() {
2857 cx.with_z_index(0, |cx| {
2858 cx.with_element_id(Some("editor_blocks"), |cx| {
2859 self.paint_blocks(bounds, &mut layout, cx);
2860 });
2861 })
2862 }
2863
2864 cx.with_z_index(1, |cx| {
2865 self.paint_overlays(text_bounds, &mut layout, cx);
2866 });
2867
2868 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2869 });
2870 })
2871 },
2872 );
2873 }
2874}
2875
2876impl IntoElement for EditorElement {
2877 type Element = Self;
2878
2879 fn element_id(&self) -> Option<gpui::ElementId> {
2880 self.editor.element_id()
2881 }
2882
2883 fn into_element(self) -> Self::Element {
2884 self
2885 }
2886}
2887
2888type BufferRow = u32;
2889
2890pub struct LayoutState {
2891 position_map: Arc<PositionMap>,
2892 gutter_size: Size<Pixels>,
2893 gutter_padding: Pixels,
2894 gutter_margin: Pixels,
2895 text_size: gpui::Size<Pixels>,
2896 mode: EditorMode,
2897 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2898 visible_anchor_range: Range<Anchor>,
2899 visible_display_row_range: Range<u32>,
2900 active_rows: BTreeMap<u32, bool>,
2901 highlighted_rows: Option<Range<u32>>,
2902 line_numbers: Vec<Option<ShapedLine>>,
2903 display_hunks: Vec<DisplayDiffHunk>,
2904 blocks: Vec<BlockLayout>,
2905 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2906 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2907 scrollbar_row_range: Range<f32>,
2908 show_scrollbars: bool,
2909 is_singleton: bool,
2910 max_row: u32,
2911 context_menu: Option<(DisplayPoint, AnyElement)>,
2912 code_actions_indicator: Option<CodeActionsIndicator>,
2913 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2914 fold_indicators: Vec<Option<IconButton>>,
2915 tab_invisible: ShapedLine,
2916 space_invisible: ShapedLine,
2917}
2918
2919struct CodeActionsIndicator {
2920 row: u32,
2921 button: IconButton,
2922}
2923
2924struct PositionMap {
2925 size: Size<Pixels>,
2926 line_height: Pixels,
2927 scroll_position: gpui::Point<Pixels>,
2928 scroll_max: gpui::Point<f32>,
2929 em_width: Pixels,
2930 em_advance: Pixels,
2931 line_layouts: Vec<LineWithInvisibles>,
2932 snapshot: EditorSnapshot,
2933}
2934
2935#[derive(Debug, Copy, Clone)]
2936pub struct PointForPosition {
2937 pub previous_valid: DisplayPoint,
2938 pub next_valid: DisplayPoint,
2939 pub exact_unclipped: DisplayPoint,
2940 pub column_overshoot_after_line_end: u32,
2941}
2942
2943impl PointForPosition {
2944 #[cfg(test)]
2945 pub fn valid(valid: DisplayPoint) -> Self {
2946 Self {
2947 previous_valid: valid,
2948 next_valid: valid,
2949 exact_unclipped: valid,
2950 column_overshoot_after_line_end: 0,
2951 }
2952 }
2953
2954 pub fn as_valid(&self) -> Option<DisplayPoint> {
2955 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2956 Some(self.previous_valid)
2957 } else {
2958 None
2959 }
2960 }
2961}
2962
2963impl PositionMap {
2964 fn point_for_position(
2965 &self,
2966 text_bounds: Bounds<Pixels>,
2967 position: gpui::Point<Pixels>,
2968 ) -> PointForPosition {
2969 let scroll_position = self.snapshot.scroll_position();
2970 let position = position - text_bounds.origin;
2971 let y = position.y.max(px(0.)).min(self.size.height);
2972 let x = position.x + (scroll_position.x * self.em_width);
2973 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2974
2975 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2976 .line_layouts
2977 .get(row as usize - scroll_position.y as usize)
2978 .map(|&LineWithInvisibles { ref line, .. }| line)
2979 {
2980 if let Some(ix) = line.index_for_x(x) {
2981 (ix as u32, px(0.))
2982 } else {
2983 (line.len as u32, px(0.).max(x - line.width))
2984 }
2985 } else {
2986 (0, x)
2987 };
2988
2989 let mut exact_unclipped = DisplayPoint::new(row, column);
2990 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2991 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2992
2993 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2994 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2995 PointForPosition {
2996 previous_valid,
2997 next_valid,
2998 exact_unclipped,
2999 column_overshoot_after_line_end,
3000 }
3001 }
3002}
3003
3004struct BlockLayout {
3005 row: u32,
3006 element: AnyElement,
3007 available_space: Size<AvailableSpace>,
3008 style: BlockStyle,
3009}
3010
3011fn layout_line(
3012 row: u32,
3013 snapshot: &EditorSnapshot,
3014 style: &EditorStyle,
3015 cx: &WindowContext,
3016) -> Result<ShapedLine> {
3017 let mut line = snapshot.line(row);
3018
3019 if line.len() > MAX_LINE_LEN {
3020 let mut len = MAX_LINE_LEN;
3021 while !line.is_char_boundary(len) {
3022 len -= 1;
3023 }
3024
3025 line.truncate(len);
3026 }
3027
3028 cx.text_system().shape_line(
3029 line.into(),
3030 style.text.font_size.to_pixels(cx.rem_size()),
3031 &[TextRun {
3032 len: snapshot.line_len(row) as usize,
3033 font: style.text.font(),
3034 color: Hsla::default(),
3035 background_color: None,
3036 underline: None,
3037 }],
3038 )
3039}
3040
3041#[derive(Debug)]
3042pub struct Cursor {
3043 origin: gpui::Point<Pixels>,
3044 block_width: Pixels,
3045 line_height: Pixels,
3046 color: Hsla,
3047 shape: CursorShape,
3048 block_text: Option<ShapedLine>,
3049}
3050
3051impl Cursor {
3052 pub fn new(
3053 origin: gpui::Point<Pixels>,
3054 block_width: Pixels,
3055 line_height: Pixels,
3056 color: Hsla,
3057 shape: CursorShape,
3058 block_text: Option<ShapedLine>,
3059 ) -> Cursor {
3060 Cursor {
3061 origin,
3062 block_width,
3063 line_height,
3064 color,
3065 shape,
3066 block_text,
3067 }
3068 }
3069
3070 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3071 Bounds {
3072 origin: self.origin + origin,
3073 size: size(self.block_width, self.line_height),
3074 }
3075 }
3076
3077 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3078 let bounds = match self.shape {
3079 CursorShape::Bar => Bounds {
3080 origin: self.origin + origin,
3081 size: size(px(2.0), self.line_height),
3082 },
3083 CursorShape::Block | CursorShape::Hollow => Bounds {
3084 origin: self.origin + origin,
3085 size: size(self.block_width, self.line_height),
3086 },
3087 CursorShape::Underscore => Bounds {
3088 origin: self.origin
3089 + origin
3090 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3091 size: size(self.block_width, px(2.0)),
3092 },
3093 };
3094
3095 //Draw background or border quad
3096 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3097 outline(bounds, self.color)
3098 } else {
3099 fill(bounds, self.color)
3100 };
3101
3102 cx.paint_quad(cursor);
3103
3104 if let Some(block_text) = &self.block_text {
3105 block_text
3106 .paint(self.origin + origin, self.line_height, cx)
3107 .log_err();
3108 }
3109 }
3110
3111 pub fn shape(&self) -> CursorShape {
3112 self.shape
3113 }
3114}
3115
3116#[derive(Debug)]
3117pub struct HighlightedRange {
3118 pub start_y: Pixels,
3119 pub line_height: Pixels,
3120 pub lines: Vec<HighlightedRangeLine>,
3121 pub color: Hsla,
3122 pub corner_radius: Pixels,
3123}
3124
3125#[derive(Debug)]
3126pub struct HighlightedRangeLine {
3127 pub start_x: Pixels,
3128 pub end_x: Pixels,
3129}
3130
3131impl HighlightedRange {
3132 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3133 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3134 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3135 self.paint_lines(
3136 self.start_y + self.line_height,
3137 &self.lines[1..],
3138 bounds,
3139 cx,
3140 );
3141 } else {
3142 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3143 }
3144 }
3145
3146 fn paint_lines(
3147 &self,
3148 start_y: Pixels,
3149 lines: &[HighlightedRangeLine],
3150 _bounds: Bounds<Pixels>,
3151 cx: &mut WindowContext,
3152 ) {
3153 if lines.is_empty() {
3154 return;
3155 }
3156
3157 let first_line = lines.first().unwrap();
3158 let last_line = lines.last().unwrap();
3159
3160 let first_top_left = point(first_line.start_x, start_y);
3161 let first_top_right = point(first_line.end_x, start_y);
3162
3163 let curve_height = point(Pixels::ZERO, self.corner_radius);
3164 let curve_width = |start_x: Pixels, end_x: Pixels| {
3165 let max = (end_x - start_x) / 2.;
3166 let width = if max < self.corner_radius {
3167 max
3168 } else {
3169 self.corner_radius
3170 };
3171
3172 point(width, Pixels::ZERO)
3173 };
3174
3175 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3176 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3177 path.curve_to(first_top_right + curve_height, first_top_right);
3178
3179 let mut iter = lines.iter().enumerate().peekable();
3180 while let Some((ix, line)) = iter.next() {
3181 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3182
3183 if let Some((_, next_line)) = iter.peek() {
3184 let next_top_right = point(next_line.end_x, bottom_right.y);
3185
3186 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3187 Ordering::Equal => {
3188 path.line_to(bottom_right);
3189 }
3190 Ordering::Less => {
3191 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3192 path.line_to(bottom_right - curve_height);
3193 if self.corner_radius > Pixels::ZERO {
3194 path.curve_to(bottom_right - curve_width, bottom_right);
3195 }
3196 path.line_to(next_top_right + curve_width);
3197 if self.corner_radius > Pixels::ZERO {
3198 path.curve_to(next_top_right + curve_height, next_top_right);
3199 }
3200 }
3201 Ordering::Greater => {
3202 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3203 path.line_to(bottom_right - curve_height);
3204 if self.corner_radius > Pixels::ZERO {
3205 path.curve_to(bottom_right + curve_width, bottom_right);
3206 }
3207 path.line_to(next_top_right - curve_width);
3208 if self.corner_radius > Pixels::ZERO {
3209 path.curve_to(next_top_right + curve_height, next_top_right);
3210 }
3211 }
3212 }
3213 } else {
3214 let curve_width = curve_width(line.start_x, line.end_x);
3215 path.line_to(bottom_right - curve_height);
3216 if self.corner_radius > Pixels::ZERO {
3217 path.curve_to(bottom_right - curve_width, bottom_right);
3218 }
3219
3220 let bottom_left = point(line.start_x, bottom_right.y);
3221 path.line_to(bottom_left + curve_width);
3222 if self.corner_radius > Pixels::ZERO {
3223 path.curve_to(bottom_left - curve_height, bottom_left);
3224 }
3225 }
3226 }
3227
3228 if first_line.start_x > last_line.start_x {
3229 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3230 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3231 path.line_to(second_top_left + curve_height);
3232 if self.corner_radius > Pixels::ZERO {
3233 path.curve_to(second_top_left + curve_width, second_top_left);
3234 }
3235 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3236 path.line_to(first_bottom_left - curve_width);
3237 if self.corner_radius > Pixels::ZERO {
3238 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3239 }
3240 }
3241
3242 path.line_to(first_top_left + curve_height);
3243 if self.corner_radius > Pixels::ZERO {
3244 path.curve_to(first_top_left + top_curve_width, first_top_left);
3245 }
3246 path.line_to(first_top_right - top_curve_width);
3247
3248 cx.paint_path(path, self.color);
3249 }
3250}
3251
3252pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3253 (delta.pow(1.5) / 100.0).into()
3254}
3255
3256fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3257 (delta.pow(1.2) / 300.0).into()
3258}
3259
3260#[cfg(test)]
3261mod tests {
3262 use super::*;
3263 use crate::{
3264 display_map::{BlockDisposition, BlockProperties},
3265 editor_tests::{init_test, update_test_language_settings},
3266 Editor, MultiBuffer,
3267 };
3268 use gpui::TestAppContext;
3269 use language::language_settings;
3270 use log::info;
3271 use std::{num::NonZeroU32, sync::Arc};
3272 use util::test::sample_text;
3273
3274 #[gpui::test]
3275 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3276 init_test(cx, |_| {});
3277 let window = cx.add_window(|cx| {
3278 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3279 Editor::new(EditorMode::Full, buffer, None, cx)
3280 });
3281
3282 let editor = window.root(cx).unwrap();
3283 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3284 let element = EditorElement::new(&editor, style);
3285
3286 let layouts = window
3287 .update(cx, |editor, cx| {
3288 let snapshot = editor.snapshot(cx);
3289 element
3290 .shape_line_numbers(
3291 0..6,
3292 &Default::default(),
3293 DisplayPoint::new(0, 0),
3294 false,
3295 &snapshot,
3296 cx,
3297 )
3298 .0
3299 })
3300 .unwrap();
3301 assert_eq!(layouts.len(), 6);
3302
3303 let relative_rows = window
3304 .update(cx, |editor, cx| {
3305 let snapshot = editor.snapshot(cx);
3306 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3307 })
3308 .unwrap();
3309 assert_eq!(relative_rows[&0], 3);
3310 assert_eq!(relative_rows[&1], 2);
3311 assert_eq!(relative_rows[&2], 1);
3312 // current line has no relative number
3313 assert_eq!(relative_rows[&4], 1);
3314 assert_eq!(relative_rows[&5], 2);
3315
3316 // works if cursor is before screen
3317 let relative_rows = window
3318 .update(cx, |editor, cx| {
3319 let snapshot = editor.snapshot(cx);
3320
3321 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3322 })
3323 .unwrap();
3324 assert_eq!(relative_rows.len(), 3);
3325 assert_eq!(relative_rows[&3], 2);
3326 assert_eq!(relative_rows[&4], 3);
3327 assert_eq!(relative_rows[&5], 4);
3328
3329 // works if cursor is after screen
3330 let relative_rows = window
3331 .update(cx, |editor, cx| {
3332 let snapshot = editor.snapshot(cx);
3333
3334 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3335 })
3336 .unwrap();
3337 assert_eq!(relative_rows.len(), 3);
3338 assert_eq!(relative_rows[&0], 5);
3339 assert_eq!(relative_rows[&1], 4);
3340 assert_eq!(relative_rows[&2], 3);
3341 }
3342
3343 #[gpui::test]
3344 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3345 init_test(cx, |_| {});
3346
3347 let window = cx.add_window(|cx| {
3348 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3349 Editor::new(EditorMode::Full, buffer, None, cx)
3350 });
3351 let editor = window.root(cx).unwrap();
3352 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3353 let mut element = EditorElement::new(&editor, style);
3354
3355 window
3356 .update(cx, |editor, cx| {
3357 editor.cursor_shape = CursorShape::Block;
3358 editor.change_selections(None, cx, |s| {
3359 s.select_ranges([
3360 Point::new(0, 0)..Point::new(1, 0),
3361 Point::new(3, 2)..Point::new(3, 3),
3362 Point::new(5, 6)..Point::new(6, 0),
3363 ]);
3364 });
3365 })
3366 .unwrap();
3367 let state = cx
3368 .update_window(window.into(), |_, cx| {
3369 element.compute_layout(
3370 Bounds {
3371 origin: point(px(500.), px(500.)),
3372 size: size(px(500.), px(500.)),
3373 },
3374 cx,
3375 )
3376 })
3377 .unwrap();
3378
3379 assert_eq!(state.selections.len(), 1);
3380 let local_selections = &state.selections[0].1;
3381 assert_eq!(local_selections.len(), 3);
3382 // moves cursor back one line
3383 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3384 assert_eq!(
3385 local_selections[0].range,
3386 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3387 );
3388
3389 // moves cursor back one column
3390 assert_eq!(
3391 local_selections[1].range,
3392 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3393 );
3394 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3395
3396 // leaves cursor on the max point
3397 assert_eq!(
3398 local_selections[2].range,
3399 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3400 );
3401 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3402
3403 // active lines does not include 1 (even though the range of the selection does)
3404 assert_eq!(
3405 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3406 vec![0, 3, 5, 6]
3407 );
3408
3409 // multi-buffer support
3410 // in DisplayPoint co-ordinates, this is what we're dealing with:
3411 // 0: [[file
3412 // 1: header]]
3413 // 2: aaaaaa
3414 // 3: bbbbbb
3415 // 4: cccccc
3416 // 5:
3417 // 6: ...
3418 // 7: ffffff
3419 // 8: gggggg
3420 // 9: hhhhhh
3421 // 10:
3422 // 11: [[file
3423 // 12: header]]
3424 // 13: bbbbbb
3425 // 14: cccccc
3426 // 15: dddddd
3427 let window = cx.add_window(|cx| {
3428 let buffer = MultiBuffer::build_multi(
3429 [
3430 (
3431 &(sample_text(8, 6, 'a') + "\n"),
3432 vec![
3433 Point::new(0, 0)..Point::new(3, 0),
3434 Point::new(4, 0)..Point::new(7, 0),
3435 ],
3436 ),
3437 (
3438 &(sample_text(8, 6, 'a') + "\n"),
3439 vec![Point::new(1, 0)..Point::new(3, 0)],
3440 ),
3441 ],
3442 cx,
3443 );
3444 Editor::new(EditorMode::Full, buffer, None, cx)
3445 });
3446 let editor = window.root(cx).unwrap();
3447 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3448 let mut element = EditorElement::new(&editor, style);
3449 let _state = window.update(cx, |editor, cx| {
3450 editor.cursor_shape = CursorShape::Block;
3451 editor.change_selections(None, cx, |s| {
3452 s.select_display_ranges([
3453 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3454 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3455 ]);
3456 });
3457 });
3458
3459 let state = cx
3460 .update_window(window.into(), |_, cx| {
3461 element.compute_layout(
3462 Bounds {
3463 origin: point(px(500.), px(500.)),
3464 size: size(px(500.), px(500.)),
3465 },
3466 cx,
3467 )
3468 })
3469 .unwrap();
3470 assert_eq!(state.selections.len(), 1);
3471 let local_selections = &state.selections[0].1;
3472 assert_eq!(local_selections.len(), 2);
3473
3474 // moves cursor on excerpt boundary back a line
3475 // and doesn't allow selection to bleed through
3476 assert_eq!(
3477 local_selections[0].range,
3478 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3479 );
3480 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3481 // moves cursor on buffer boundary back two lines
3482 // and doesn't allow selection to bleed through
3483 assert_eq!(
3484 local_selections[1].range,
3485 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3486 );
3487 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3488 }
3489
3490 #[gpui::test]
3491 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3492 init_test(cx, |_| {});
3493
3494 let window = cx.add_window(|cx| {
3495 let buffer = MultiBuffer::build_simple("", cx);
3496 Editor::new(EditorMode::Full, buffer, None, cx)
3497 });
3498 let editor = window.root(cx).unwrap();
3499 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3500 window
3501 .update(cx, |editor, cx| {
3502 editor.set_placeholder_text("hello", cx);
3503 editor.insert_blocks(
3504 [BlockProperties {
3505 style: BlockStyle::Fixed,
3506 disposition: BlockDisposition::Above,
3507 height: 3,
3508 position: Anchor::min(),
3509 render: Arc::new(|_| div().into_any()),
3510 }],
3511 None,
3512 cx,
3513 );
3514
3515 // Blur the editor so that it displays placeholder text.
3516 cx.blur();
3517 })
3518 .unwrap();
3519
3520 let mut element = EditorElement::new(&editor, style);
3521 let state = cx
3522 .update_window(window.into(), |_, cx| {
3523 element.compute_layout(
3524 Bounds {
3525 origin: point(px(500.), px(500.)),
3526 size: size(px(500.), px(500.)),
3527 },
3528 cx,
3529 )
3530 })
3531 .unwrap();
3532 let size = state.position_map.size;
3533
3534 assert_eq!(state.position_map.line_layouts.len(), 4);
3535 assert_eq!(
3536 state
3537 .line_numbers
3538 .iter()
3539 .map(Option::is_some)
3540 .collect::<Vec<_>>(),
3541 &[false, false, false, true]
3542 );
3543
3544 // Don't panic.
3545 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3546 cx.update_window(window.into(), |_, cx| {
3547 element.paint(bounds, &mut (), cx);
3548 })
3549 .unwrap()
3550 }
3551
3552 #[gpui::test]
3553 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3554 const TAB_SIZE: u32 = 4;
3555
3556 let input_text = "\t \t|\t| a b";
3557 let expected_invisibles = vec![
3558 Invisible::Tab {
3559 line_start_offset: 0,
3560 },
3561 Invisible::Whitespace {
3562 line_offset: TAB_SIZE as usize,
3563 },
3564 Invisible::Tab {
3565 line_start_offset: TAB_SIZE as usize + 1,
3566 },
3567 Invisible::Tab {
3568 line_start_offset: TAB_SIZE as usize * 2 + 1,
3569 },
3570 Invisible::Whitespace {
3571 line_offset: TAB_SIZE as usize * 3 + 1,
3572 },
3573 Invisible::Whitespace {
3574 line_offset: TAB_SIZE as usize * 3 + 3,
3575 },
3576 ];
3577 assert_eq!(
3578 expected_invisibles.len(),
3579 input_text
3580 .chars()
3581 .filter(|initial_char| initial_char.is_whitespace())
3582 .count(),
3583 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3584 );
3585
3586 init_test(cx, |s| {
3587 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3588 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3589 });
3590
3591 let actual_invisibles =
3592 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3593
3594 assert_eq!(expected_invisibles, actual_invisibles);
3595 }
3596
3597 #[gpui::test]
3598 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3599 init_test(cx, |s| {
3600 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3601 s.defaults.tab_size = NonZeroU32::new(4);
3602 });
3603
3604 for editor_mode_without_invisibles in [
3605 EditorMode::SingleLine,
3606 EditorMode::AutoHeight { max_lines: 100 },
3607 ] {
3608 let invisibles = collect_invisibles_from_new_editor(
3609 cx,
3610 editor_mode_without_invisibles,
3611 "\t\t\t| | a b",
3612 px(500.0),
3613 );
3614 assert!(invisibles.is_empty(),
3615 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3616 }
3617 }
3618
3619 #[gpui::test]
3620 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3621 let tab_size = 4;
3622 let input_text = "a\tbcd ".repeat(9);
3623 let repeated_invisibles = [
3624 Invisible::Tab {
3625 line_start_offset: 1,
3626 },
3627 Invisible::Whitespace {
3628 line_offset: tab_size as usize + 3,
3629 },
3630 Invisible::Whitespace {
3631 line_offset: tab_size as usize + 4,
3632 },
3633 Invisible::Whitespace {
3634 line_offset: tab_size as usize + 5,
3635 },
3636 ];
3637 let expected_invisibles = std::iter::once(repeated_invisibles)
3638 .cycle()
3639 .take(9)
3640 .flatten()
3641 .collect::<Vec<_>>();
3642 assert_eq!(
3643 expected_invisibles.len(),
3644 input_text
3645 .chars()
3646 .filter(|initial_char| initial_char.is_whitespace())
3647 .count(),
3648 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3649 );
3650 info!("Expected invisibles: {expected_invisibles:?}");
3651
3652 init_test(cx, |_| {});
3653
3654 // Put the same string with repeating whitespace pattern into editors of various size,
3655 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3656 let resize_step = 10.0;
3657 let mut editor_width = 200.0;
3658 while editor_width <= 1000.0 {
3659 update_test_language_settings(cx, |s| {
3660 s.defaults.tab_size = NonZeroU32::new(tab_size);
3661 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3662 s.defaults.preferred_line_length = Some(editor_width as u32);
3663 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3664 });
3665
3666 let actual_invisibles = collect_invisibles_from_new_editor(
3667 cx,
3668 EditorMode::Full,
3669 &input_text,
3670 px(editor_width),
3671 );
3672
3673 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3674 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3675 let mut i = 0;
3676 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3677 i = actual_index;
3678 match expected_invisibles.get(i) {
3679 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3680 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3681 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3682 _ => {
3683 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3684 }
3685 },
3686 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3687 }
3688 }
3689 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3690 assert!(
3691 missing_expected_invisibles.is_empty(),
3692 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3693 );
3694
3695 editor_width += resize_step;
3696 }
3697 }
3698
3699 fn collect_invisibles_from_new_editor(
3700 cx: &mut TestAppContext,
3701 editor_mode: EditorMode,
3702 input_text: &str,
3703 editor_width: Pixels,
3704 ) -> Vec<Invisible> {
3705 info!(
3706 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3707 editor_width.0
3708 );
3709 let window = cx.add_window(|cx| {
3710 let buffer = MultiBuffer::build_simple(&input_text, cx);
3711 Editor::new(editor_mode, buffer, None, cx)
3712 });
3713 let editor = window.root(cx).unwrap();
3714 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3715 let mut element = EditorElement::new(&editor, style);
3716 window
3717 .update(cx, |editor, cx| {
3718 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3719 editor.set_wrap_width(Some(editor_width), cx);
3720 })
3721 .unwrap();
3722 let layout_state = cx
3723 .update_window(window.into(), |_, cx| {
3724 element.compute_layout(
3725 Bounds {
3726 origin: point(px(500.), px(500.)),
3727 size: size(px(500.), px(500.)),
3728 },
3729 cx,
3730 )
3731 })
3732 .unwrap();
3733
3734 layout_state
3735 .position_map
3736 .line_layouts
3737 .iter()
3738 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3739 .flatten()
3740 .cloned()
3741 .collect()
3742 }
3743}
3744
3745pub fn register_action<T: Action>(
3746 view: &View<Editor>,
3747 cx: &mut WindowContext,
3748 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3749) {
3750 let view = view.clone();
3751 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3752 let action = action.downcast_ref().unwrap();
3753 if phase == DispatchPhase::Bubble {
3754 view.update(cx, |editor, cx| {
3755 listener(editor, action, cx);
3756 })
3757 }
3758 })
3759}
3760
3761fn compute_auto_height_layout(
3762 editor: &mut Editor,
3763 max_lines: usize,
3764 max_line_number_width: Pixels,
3765 known_dimensions: Size<Option<Pixels>>,
3766 cx: &mut ViewContext<Editor>,
3767) -> Option<Size<Pixels>> {
3768 let width = known_dimensions.width?;
3769 if let Some(height) = known_dimensions.height {
3770 return Some(size(width, height));
3771 }
3772
3773 let style = editor.style.as_ref().unwrap();
3774 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3775 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3776 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3777 let em_width = cx
3778 .text_system()
3779 .typographic_bounds(font_id, font_size, 'm')
3780 .unwrap()
3781 .size
3782 .width;
3783
3784 let mut snapshot = editor.snapshot(cx);
3785 let gutter_width;
3786 let gutter_margin;
3787 if snapshot.show_gutter {
3788 let descent = cx.text_system().descent(font_id, font_size);
3789 let gutter_padding_factor = 3.5;
3790 let gutter_padding = (em_width * gutter_padding_factor).round();
3791 gutter_width = max_line_number_width + gutter_padding * 2.0;
3792 gutter_margin = -descent;
3793 } else {
3794 gutter_width = Pixels::ZERO;
3795 gutter_margin = Pixels::ZERO;
3796 };
3797
3798 editor.gutter_width = gutter_width;
3799 let text_width = width - gutter_width;
3800 let overscroll = size(em_width, px(0.));
3801
3802 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3803 if editor.set_wrap_width(Some(editor_width), cx) {
3804 snapshot = editor.snapshot(cx);
3805 }
3806
3807 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3808 let height = scroll_height
3809 .max(line_height)
3810 .min(line_height * max_lines as f32);
3811
3812 Some(size(width, height))
3813}