1use crate::{
2 display_map::{
3 BlockContext, BlockStyle, DisplaySnapshot, FoldStatus, HighlightedChunk, ToDisplayPoint,
4 TransformBlock,
5 },
6 editor_settings::ShowScrollbar,
7 git::{diff_hunk_to_display, DisplayDiffHunk},
8 hover_popover::{
9 self, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 link_go_to_definition::{
12 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
13 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
14 LinkGoToDefinitionState,
15 },
16 mouse_context_menu,
17 scroll::scroll_amount::ScrollAmount,
18 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
19 HalfPageDown, HalfPageUp, LineDown, LineUp, MoveDown, OpenExcerpts, PageDown, PageUp, Point,
20 SelectPhase, Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
21};
22use anyhow::Result;
23use collections::{BTreeMap, HashMap};
24use git::diff::DiffHunkStatus;
25use gpui::{
26 div, overlay, point, px, relative, size, transparent_black, Action, AnchorCorner, AnyElement,
27 AsyncWindowContext, AvailableSpace, BorrowWindow, Bounds, ContentMask, Corners, CursorStyle,
28 DispatchPhase, Edges, Element, ElementId, ElementInputHandler, Entity, EntityId, Hsla,
29 InteractiveBounds, InteractiveElement, IntoElement, LineLayout, ModifiersChangedEvent,
30 MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement, Pixels, RenderOnce,
31 ScrollWheelEvent, ShapedLine, SharedString, Size, StackingOrder, StatefulInteractiveElement,
32 Style, Styled, TextRun, TextStyle, View, ViewContext, WeakView, WindowContext, WrappedLine,
33};
34use itertools::Itertools;
35use language::{language_settings::ShowWhitespaceSetting, Language};
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::{
55 h_stack, ButtonLike, ButtonStyle, Disclosure, IconButton, IconElement, IconSize, Label, Tooltip,
56};
57use ui::{prelude::*, Icon};
58use util::ResultExt;
59use workspace::item::Item;
60
61enum FoldMarkers {}
62
63struct SelectionLayout {
64 head: DisplayPoint,
65 cursor_shape: CursorShape,
66 is_newest: bool,
67 is_local: bool,
68 range: Range<DisplayPoint>,
69 active_rows: Range<u32>,
70}
71
72impl SelectionLayout {
73 fn new<T: ToPoint + ToDisplayPoint + Clone>(
74 selection: Selection<T>,
75 line_mode: bool,
76 cursor_shape: CursorShape,
77 map: &DisplaySnapshot,
78 is_newest: bool,
79 is_local: bool,
80 ) -> Self {
81 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
82 let display_selection = point_selection.map(|p| p.to_display_point(map));
83 let mut range = display_selection.range();
84 let mut head = display_selection.head();
85 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
86 ..map.next_line_boundary(point_selection.end).1.row();
87
88 // vim visual line mode
89 if line_mode {
90 let point_range = map.expand_to_line(point_selection.range());
91 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
92 }
93
94 // any vim visual mode (including line mode)
95 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
96 if head.column() > 0 {
97 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
98 } else if head.row() > 0 && head != map.max_point() {
99 head = map.clip_point(
100 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
101 Bias::Left,
102 );
103 // updating range.end is a no-op unless you're cursor is
104 // on the newline containing a multi-buffer divider
105 // in which case the clip_point may have moved the head up
106 // an additional row.
107 range.end = DisplayPoint::new(head.row() + 1, 0);
108 active_rows.end = head.row();
109 }
110 }
111
112 Self {
113 head,
114 cursor_shape,
115 is_newest,
116 is_local,
117 range,
118 active_rows,
119 }
120 }
121}
122
123pub struct EditorElement {
124 editor: View<Editor>,
125 style: EditorStyle,
126}
127
128impl EditorElement {
129 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
130 Self {
131 editor: editor.clone(),
132 style,
133 }
134 }
135
136 fn register_actions(&self, cx: &mut WindowContext) {
137 let view = &self.editor;
138 view.update(cx, |editor, cx| {
139 for action in editor.editor_actions.iter() {
140 (action)(cx)
141 }
142 });
143
144 crate::rust_analyzer_ext::apply_related_actions(view, cx);
145 register_action(view, cx, Editor::move_left);
146 register_action(view, cx, Editor::move_right);
147 register_action(view, cx, Editor::move_down);
148 register_action(view, cx, Editor::move_up);
149 register_action(view, cx, Editor::cancel);
150 register_action(view, cx, Editor::newline);
151 register_action(view, cx, Editor::newline_above);
152 register_action(view, cx, Editor::newline_below);
153 register_action(view, cx, Editor::backspace);
154 register_action(view, cx, Editor::delete);
155 register_action(view, cx, Editor::tab);
156 register_action(view, cx, Editor::tab_prev);
157 register_action(view, cx, Editor::indent);
158 register_action(view, cx, Editor::outdent);
159 register_action(view, cx, Editor::delete_line);
160 register_action(view, cx, Editor::join_lines);
161 register_action(view, cx, Editor::sort_lines_case_sensitive);
162 register_action(view, cx, Editor::sort_lines_case_insensitive);
163 register_action(view, cx, Editor::reverse_lines);
164 register_action(view, cx, Editor::shuffle_lines);
165 register_action(view, cx, Editor::convert_to_upper_case);
166 register_action(view, cx, Editor::convert_to_lower_case);
167 register_action(view, cx, Editor::convert_to_title_case);
168 register_action(view, cx, Editor::convert_to_snake_case);
169 register_action(view, cx, Editor::convert_to_kebab_case);
170 register_action(view, cx, Editor::convert_to_upper_camel_case);
171 register_action(view, cx, Editor::convert_to_lower_camel_case);
172 register_action(view, cx, Editor::delete_to_previous_word_start);
173 register_action(view, cx, Editor::delete_to_previous_subword_start);
174 register_action(view, cx, Editor::delete_to_next_word_end);
175 register_action(view, cx, Editor::delete_to_next_subword_end);
176 register_action(view, cx, Editor::delete_to_beginning_of_line);
177 register_action(view, cx, Editor::delete_to_end_of_line);
178 register_action(view, cx, Editor::cut_to_end_of_line);
179 register_action(view, cx, Editor::duplicate_line);
180 register_action(view, cx, Editor::move_line_up);
181 register_action(view, cx, Editor::move_line_down);
182 register_action(view, cx, Editor::transpose);
183 register_action(view, cx, Editor::cut);
184 register_action(view, cx, Editor::copy);
185 register_action(view, cx, Editor::paste);
186 register_action(view, cx, Editor::undo);
187 register_action(view, cx, Editor::redo);
188 register_action(view, cx, Editor::move_page_up);
189 register_action(view, cx, Editor::move_page_down);
190 register_action(view, cx, Editor::next_screen);
191 register_action(view, cx, Editor::scroll_cursor_top);
192 register_action(view, cx, Editor::scroll_cursor_center);
193 register_action(view, cx, Editor::scroll_cursor_bottom);
194 register_action(view, cx, |editor, _: &LineDown, cx| {
195 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
196 });
197 register_action(view, cx, |editor, _: &LineUp, cx| {
198 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
199 });
200 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
201 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
202 });
203 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
204 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
205 });
206 register_action(view, cx, |editor, _: &PageDown, cx| {
207 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
208 });
209 register_action(view, cx, |editor, _: &PageUp, cx| {
210 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
211 });
212 register_action(view, cx, Editor::move_to_previous_word_start);
213 register_action(view, cx, Editor::move_to_previous_subword_start);
214 register_action(view, cx, Editor::move_to_next_word_end);
215 register_action(view, cx, Editor::move_to_next_subword_end);
216 register_action(view, cx, Editor::move_to_beginning_of_line);
217 register_action(view, cx, Editor::move_to_end_of_line);
218 register_action(view, cx, Editor::move_to_start_of_paragraph);
219 register_action(view, cx, Editor::move_to_end_of_paragraph);
220 register_action(view, cx, Editor::move_to_beginning);
221 register_action(view, cx, Editor::move_to_end);
222 register_action(view, cx, Editor::select_up);
223 register_action(view, cx, Editor::select_down);
224 register_action(view, cx, Editor::select_left);
225 register_action(view, cx, Editor::select_right);
226 register_action(view, cx, Editor::select_to_previous_word_start);
227 register_action(view, cx, Editor::select_to_previous_subword_start);
228 register_action(view, cx, Editor::select_to_next_word_end);
229 register_action(view, cx, Editor::select_to_next_subword_end);
230 register_action(view, cx, Editor::select_to_beginning_of_line);
231 register_action(view, cx, Editor::select_to_end_of_line);
232 register_action(view, cx, Editor::select_to_start_of_paragraph);
233 register_action(view, cx, Editor::select_to_end_of_paragraph);
234 register_action(view, cx, Editor::select_to_beginning);
235 register_action(view, cx, Editor::select_to_end);
236 register_action(view, cx, Editor::select_all);
237 register_action(view, cx, |editor, action, cx| {
238 editor.select_all_matches(action, cx).log_err();
239 });
240 register_action(view, cx, Editor::select_line);
241 register_action(view, cx, Editor::split_selection_into_lines);
242 register_action(view, cx, Editor::add_selection_above);
243 register_action(view, cx, Editor::add_selection_below);
244 register_action(view, cx, |editor, action, cx| {
245 editor.select_next(action, cx).log_err();
246 });
247 register_action(view, cx, |editor, action, cx| {
248 editor.select_previous(action, cx).log_err();
249 });
250 register_action(view, cx, Editor::toggle_comments);
251 register_action(view, cx, Editor::select_larger_syntax_node);
252 register_action(view, cx, Editor::select_smaller_syntax_node);
253 register_action(view, cx, Editor::move_to_enclosing_bracket);
254 register_action(view, cx, Editor::undo_selection);
255 register_action(view, cx, Editor::redo_selection);
256 register_action(view, cx, Editor::go_to_diagnostic);
257 register_action(view, cx, Editor::go_to_prev_diagnostic);
258 register_action(view, cx, Editor::go_to_hunk);
259 register_action(view, cx, Editor::go_to_prev_hunk);
260 register_action(view, cx, Editor::go_to_definition);
261 register_action(view, cx, Editor::go_to_definition_split);
262 register_action(view, cx, Editor::go_to_type_definition);
263 register_action(view, cx, Editor::go_to_type_definition_split);
264 register_action(view, cx, Editor::fold);
265 register_action(view, cx, Editor::fold_at);
266 register_action(view, cx, Editor::unfold_lines);
267 register_action(view, cx, Editor::unfold_at);
268 register_action(view, cx, Editor::fold_selected_ranges);
269 register_action(view, cx, Editor::show_completions);
270 register_action(view, cx, Editor::toggle_code_actions);
271 register_action(view, cx, Editor::open_excerpts);
272 register_action(view, cx, Editor::toggle_soft_wrap);
273 register_action(view, cx, Editor::toggle_inlay_hints);
274 register_action(view, cx, hover_popover::hover);
275 register_action(view, cx, Editor::reveal_in_finder);
276 register_action(view, cx, Editor::copy_path);
277 register_action(view, cx, Editor::copy_relative_path);
278 register_action(view, cx, Editor::copy_highlight_json);
279 register_action(view, cx, |editor, action, cx| {
280 if let Some(task) = editor.format(action, cx) {
281 task.detach_and_log_err(cx);
282 } else {
283 cx.propagate();
284 }
285 });
286 register_action(view, cx, Editor::restart_language_server);
287 register_action(view, cx, Editor::show_character_palette);
288 register_action(view, cx, |editor, action, cx| {
289 if let Some(task) = editor.confirm_completion(action, cx) {
290 task.detach_and_log_err(cx);
291 } else {
292 cx.propagate();
293 }
294 });
295 register_action(view, cx, |editor, action, cx| {
296 if let Some(task) = editor.confirm_code_action(action, cx) {
297 task.detach_and_log_err(cx);
298 } else {
299 cx.propagate();
300 }
301 });
302 register_action(view, cx, |editor, action, cx| {
303 if let Some(task) = editor.rename(action, cx) {
304 task.detach_and_log_err(cx);
305 } else {
306 cx.propagate();
307 }
308 });
309 register_action(view, cx, |editor, action, cx| {
310 if let Some(task) = editor.confirm_rename(action, cx) {
311 task.detach_and_log_err(cx);
312 } else {
313 cx.propagate();
314 }
315 });
316 register_action(view, cx, |editor, action, cx| {
317 if let Some(task) = editor.find_all_references(action, cx) {
318 task.detach_and_log_err(cx);
319 } else {
320 cx.propagate();
321 }
322 });
323 register_action(view, cx, Editor::next_copilot_suggestion);
324 register_action(view, cx, Editor::previous_copilot_suggestion);
325 register_action(view, cx, Editor::copilot_suggest);
326 register_action(view, cx, Editor::context_menu_first);
327 register_action(view, cx, Editor::context_menu_prev);
328 register_action(view, cx, Editor::context_menu_next);
329 register_action(view, cx, Editor::context_menu_last);
330 }
331
332 fn register_key_listeners(&self, cx: &mut WindowContext) {
333 cx.on_key_event({
334 let editor = self.editor.clone();
335 move |event: &ModifiersChangedEvent, phase, cx| {
336 if phase != DispatchPhase::Bubble {
337 return;
338 }
339
340 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
341 cx.stop_propagation();
342 }
343 }
344 });
345 }
346
347 pub(crate) fn modifiers_changed(
348 editor: &mut Editor,
349 event: &ModifiersChangedEvent,
350 cx: &mut ViewContext<Editor>,
351 ) -> bool {
352 let pending_selection = editor.has_pending_selection();
353
354 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
355 if event.command && !pending_selection {
356 let point = point.clone();
357 let snapshot = editor.snapshot(cx);
358 let kind = point.definition_kind(event.shift);
359
360 show_link_definition(kind, editor, point, snapshot, cx);
361 return false;
362 }
363 }
364
365 {
366 if editor.link_go_to_definition_state.symbol_range.is_some()
367 || !editor.link_go_to_definition_state.definitions.is_empty()
368 {
369 editor.link_go_to_definition_state.symbol_range.take();
370 editor.link_go_to_definition_state.definitions.clear();
371 cx.notify();
372 }
373
374 editor.link_go_to_definition_state.task = None;
375
376 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
377 }
378
379 false
380 }
381
382 fn mouse_left_down(
383 editor: &mut Editor,
384 event: &MouseDownEvent,
385 position_map: &PositionMap,
386 text_bounds: Bounds<Pixels>,
387 gutter_bounds: Bounds<Pixels>,
388 stacking_order: &StackingOrder,
389 cx: &mut ViewContext<Editor>,
390 ) {
391 let mut click_count = event.click_count;
392 let modifiers = event.modifiers;
393
394 if gutter_bounds.contains_point(&event.position) {
395 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
396 } else if !text_bounds.contains_point(&event.position) {
397 return;
398 }
399 if !cx.was_top_layer(&event.position, stacking_order) {
400 return;
401 }
402
403 let point_for_position = position_map.point_for_position(text_bounds, event.position);
404 let position = point_for_position.previous_valid;
405 if modifiers.shift && modifiers.alt {
406 editor.select(
407 SelectPhase::BeginColumnar {
408 position,
409 goal_column: point_for_position.exact_unclipped.column(),
410 },
411 cx,
412 );
413 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
414 editor.select(
415 SelectPhase::Extend {
416 position,
417 click_count,
418 },
419 cx,
420 );
421 } else {
422 editor.select(
423 SelectPhase::Begin {
424 position,
425 add: modifiers.alt,
426 click_count,
427 },
428 cx,
429 );
430 }
431
432 cx.stop_propagation();
433 }
434
435 fn mouse_right_down(
436 editor: &mut Editor,
437 event: &MouseDownEvent,
438 position_map: &PositionMap,
439 text_bounds: Bounds<Pixels>,
440 cx: &mut ViewContext<Editor>,
441 ) {
442 if !text_bounds.contains_point(&event.position) {
443 return;
444 }
445 let point_for_position = position_map.point_for_position(text_bounds, event.position);
446 mouse_context_menu::deploy_context_menu(
447 editor,
448 event.position,
449 point_for_position.previous_valid,
450 cx,
451 );
452 cx.stop_propagation();
453 }
454
455 fn mouse_up(
456 editor: &mut Editor,
457 event: &MouseUpEvent,
458 position_map: &PositionMap,
459 text_bounds: Bounds<Pixels>,
460 stacking_order: &StackingOrder,
461 cx: &mut ViewContext<Editor>,
462 ) {
463 let end_selection = editor.has_pending_selection();
464 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
465
466 if end_selection {
467 editor.select(SelectPhase::End, cx);
468 }
469
470 if !pending_nonempty_selections
471 && event.modifiers.command
472 && text_bounds.contains_point(&event.position)
473 && cx.was_top_layer(&event.position, stacking_order)
474 {
475 let point = position_map.point_for_position(text_bounds, event.position);
476 let could_be_inlay = point.as_valid().is_none();
477 let split = event.modifiers.alt;
478 if event.modifiers.shift || could_be_inlay {
479 go_to_fetched_type_definition(editor, point, split, cx);
480 } else {
481 go_to_fetched_definition(editor, point, split, cx);
482 }
483
484 cx.stop_propagation();
485 } else if end_selection {
486 cx.stop_propagation();
487 }
488 }
489
490 fn mouse_moved(
491 editor: &mut Editor,
492 event: &MouseMoveEvent,
493 position_map: &PositionMap,
494 text_bounds: Bounds<Pixels>,
495 gutter_bounds: Bounds<Pixels>,
496 stacking_order: &StackingOrder,
497 cx: &mut ViewContext<Editor>,
498 ) {
499 let modifiers = event.modifiers;
500 if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
501 let point_for_position = position_map.point_for_position(text_bounds, event.position);
502 let mut scroll_delta = gpui::Point::<f32>::default();
503 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
504 let top = text_bounds.origin.y + vertical_margin;
505 let bottom = text_bounds.lower_left().y - vertical_margin;
506 if event.position.y < top {
507 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
508 }
509 if event.position.y > bottom {
510 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
511 }
512
513 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
514 let left = text_bounds.origin.x + horizontal_margin;
515 let right = text_bounds.upper_right().x - horizontal_margin;
516 if event.position.x < left {
517 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
518 }
519 if event.position.x > right {
520 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
521 }
522
523 editor.select(
524 SelectPhase::Update {
525 position: point_for_position.previous_valid,
526 goal_column: point_for_position.exact_unclipped.column(),
527 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
528 .clamp(&gpui::Point::default(), &position_map.scroll_max),
529 },
530 cx,
531 );
532 }
533
534 let text_hovered = text_bounds.contains_point(&event.position);
535 let gutter_hovered = gutter_bounds.contains_point(&event.position);
536 let was_top = cx.was_top_layer(&event.position, stacking_order);
537
538 editor.set_gutter_hovered(gutter_hovered, cx);
539
540 // Don't trigger hover popover if mouse is hovering over context menu
541 if text_hovered && was_top {
542 let point_for_position = position_map.point_for_position(text_bounds, event.position);
543
544 match point_for_position.as_valid() {
545 Some(point) => {
546 update_go_to_definition_link(
547 editor,
548 Some(GoToDefinitionTrigger::Text(point)),
549 modifiers.command,
550 modifiers.shift,
551 cx,
552 );
553 hover_at(editor, Some(point), cx);
554 }
555 None => {
556 update_inlay_link_and_hover_points(
557 &position_map.snapshot,
558 point_for_position,
559 editor,
560 modifiers.command,
561 modifiers.shift,
562 cx,
563 );
564 }
565 }
566
567 cx.stop_propagation();
568 } else {
569 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
570 hover_at(editor, None, cx);
571 if gutter_hovered && was_top {
572 cx.stop_propagation();
573 }
574 }
575 }
576
577 fn scroll(
578 editor: &mut Editor,
579 event: &ScrollWheelEvent,
580 position_map: &PositionMap,
581 bounds: &InteractiveBounds,
582 cx: &mut ViewContext<Editor>,
583 ) {
584 if !bounds.visibly_contains(&event.position, cx) {
585 return;
586 }
587
588 let line_height = position_map.line_height;
589 let max_glyph_width = position_map.em_width;
590 let (delta, axis) = match event.delta {
591 gpui::ScrollDelta::Pixels(mut pixels) => {
592 //Trackpad
593 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
594 (pixels, axis)
595 }
596
597 gpui::ScrollDelta::Lines(lines) => {
598 //Not trackpad
599 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
600 (pixels, None)
601 }
602 };
603
604 let scroll_position = position_map.snapshot.scroll_position();
605 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
606 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
607 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
608 editor.scroll(scroll_position, axis, cx);
609 cx.stop_propagation();
610 }
611
612 fn paint_background(
613 &self,
614 gutter_bounds: Bounds<Pixels>,
615 text_bounds: Bounds<Pixels>,
616 layout: &LayoutState,
617 cx: &mut WindowContext,
618 ) {
619 let bounds = gutter_bounds.union(&text_bounds);
620 let scroll_top =
621 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
622 let gutter_bg = cx.theme().colors().editor_gutter_background;
623 cx.paint_quad(
624 gutter_bounds,
625 Corners::default(),
626 gutter_bg,
627 Edges::default(),
628 transparent_black(),
629 );
630 cx.paint_quad(
631 text_bounds,
632 Corners::default(),
633 self.style.background,
634 Edges::default(),
635 transparent_black(),
636 );
637
638 if let EditorMode::Full = layout.mode {
639 let mut active_rows = layout.active_rows.iter().peekable();
640 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
641 let mut end_row = *start_row;
642 while active_rows.peek().map_or(false, |r| {
643 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
644 }) {
645 active_rows.next().unwrap();
646 end_row += 1;
647 }
648
649 if !contains_non_empty_selection {
650 let origin = point(
651 bounds.origin.x,
652 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
653 - scroll_top,
654 );
655 let size = size(
656 bounds.size.width,
657 layout.position_map.line_height * (end_row - start_row + 1) as f32,
658 );
659 let active_line_bg = cx.theme().colors().editor_active_line_background;
660 cx.paint_quad(
661 Bounds { origin, size },
662 Corners::default(),
663 active_line_bg,
664 Edges::default(),
665 transparent_black(),
666 );
667 }
668 }
669
670 if let Some(highlighted_rows) = &layout.highlighted_rows {
671 let origin = point(
672 bounds.origin.x,
673 bounds.origin.y
674 + (layout.position_map.line_height * highlighted_rows.start as f32)
675 - scroll_top,
676 );
677 let size = size(
678 bounds.size.width,
679 layout.position_map.line_height * highlighted_rows.len() as f32,
680 );
681 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
682 cx.paint_quad(
683 Bounds { origin, size },
684 Corners::default(),
685 highlighted_line_bg,
686 Edges::default(),
687 transparent_black(),
688 );
689 }
690
691 let scroll_left =
692 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
693
694 for (wrap_position, active) in layout.wrap_guides.iter() {
695 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
696 - scroll_left;
697
698 if x < text_bounds.origin.x
699 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
700 {
701 continue;
702 }
703
704 let color = if *active {
705 cx.theme().colors().editor_active_wrap_guide
706 } else {
707 cx.theme().colors().editor_wrap_guide
708 };
709 cx.paint_quad(
710 Bounds {
711 origin: point(x, text_bounds.origin.y),
712 size: size(px(1.), text_bounds.size.height),
713 },
714 Corners::default(),
715 color,
716 Edges::default(),
717 transparent_black(),
718 );
719 }
720 }
721 }
722
723 fn paint_gutter(
724 &mut self,
725 bounds: Bounds<Pixels>,
726 layout: &mut LayoutState,
727 cx: &mut WindowContext,
728 ) {
729 let line_height = layout.position_map.line_height;
730
731 let scroll_position = layout.position_map.snapshot.scroll_position();
732 let scroll_top = scroll_position.y * line_height;
733
734 let show_gutter = matches!(
735 ProjectSettings::get_global(cx).git.git_gutter,
736 Some(GitGutterSetting::TrackedFiles)
737 );
738
739 if show_gutter {
740 Self::paint_diff_hunks(bounds, layout, cx);
741 }
742
743 for (ix, line) in layout.line_numbers.iter().enumerate() {
744 if let Some(line) = line {
745 let line_origin = bounds.origin
746 + point(
747 bounds.size.width - line.width - layout.gutter_padding,
748 ix as f32 * line_height - (scroll_top % line_height),
749 );
750
751 line.paint(line_origin, line_height, cx);
752 }
753 }
754
755 cx.with_z_index(1, |cx| {
756 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
757 if let Some(mut fold_indicator) = fold_indicator {
758 let mut fold_indicator = fold_indicator.into_any_element();
759 let available_space = size(
760 AvailableSpace::MinContent,
761 AvailableSpace::Definite(line_height * 0.55),
762 );
763 let fold_indicator_size = fold_indicator.measure(available_space, cx);
764
765 let position = point(
766 bounds.size.width - layout.gutter_padding,
767 ix as f32 * line_height - (scroll_top % line_height),
768 );
769 let centering_offset = point(
770 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
771 / 2.,
772 (line_height - fold_indicator_size.height) / 2.,
773 );
774 let origin = bounds.origin + position + centering_offset;
775 fold_indicator.draw(origin, available_space, cx);
776 }
777 }
778
779 if let Some(indicator) = layout.code_actions_indicator.take() {
780 let mut button = indicator.button.into_any_element();
781 let available_space = size(
782 AvailableSpace::MinContent,
783 AvailableSpace::Definite(line_height),
784 );
785 let indicator_size = button.measure(available_space, cx);
786
787 let mut x = Pixels::ZERO;
788 let mut y = indicator.row as f32 * line_height - scroll_top;
789 // Center indicator.
790 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
791 y += (line_height - indicator_size.height) / 2.;
792
793 button.draw(bounds.origin + point(x, y), available_space, cx);
794 }
795 });
796 }
797
798 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
799 let line_height = layout.position_map.line_height;
800
801 let scroll_position = layout.position_map.snapshot.scroll_position();
802 let scroll_top = scroll_position.y * line_height;
803
804 for hunk in &layout.display_hunks {
805 let (display_row_range, status) = match hunk {
806 //TODO: This rendering is entirely a horrible hack
807 &DisplayDiffHunk::Folded { display_row: row } => {
808 let start_y = row as f32 * line_height - scroll_top;
809 let end_y = start_y + line_height;
810
811 let width = 0.275 * line_height;
812 let highlight_origin = bounds.origin + point(-width, start_y);
813 let highlight_size = size(width * 2., end_y - start_y);
814 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
815 cx.paint_quad(
816 highlight_bounds,
817 Corners::all(1. * line_height),
818 gpui::yellow(), // todo!("use the right color")
819 Edges::default(),
820 transparent_black(),
821 );
822
823 continue;
824 }
825
826 DisplayDiffHunk::Unfolded {
827 display_row_range,
828 status,
829 } => (display_row_range, status),
830 };
831
832 let color = match status {
833 DiffHunkStatus::Added => cx.theme().status().created,
834 DiffHunkStatus::Modified => cx.theme().status().modified,
835
836 //TODO: This rendering is entirely a horrible hack
837 DiffHunkStatus::Removed => {
838 let row = display_row_range.start;
839
840 let offset = line_height / 2.;
841 let start_y = row as f32 * line_height - offset - scroll_top;
842 let end_y = start_y + line_height;
843
844 let width = 0.275 * line_height;
845 let highlight_origin = bounds.origin + point(-width, start_y);
846 let highlight_size = size(width * 2., end_y - start_y);
847 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
848 cx.paint_quad(
849 highlight_bounds,
850 Corners::all(1. * line_height),
851 cx.theme().status().deleted,
852 Edges::default(),
853 transparent_black(),
854 );
855
856 continue;
857 }
858 };
859
860 let start_row = display_row_range.start;
861 let end_row = display_row_range.end;
862
863 let start_y = start_row as f32 * line_height - scroll_top;
864 let end_y = end_row as f32 * line_height - scroll_top;
865
866 let width = 0.275 * line_height;
867 let highlight_origin = bounds.origin + point(-width, start_y);
868 let highlight_size = size(width * 2., end_y - start_y);
869 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
870 cx.paint_quad(
871 highlight_bounds,
872 Corners::all(0.05 * line_height),
873 color, // todo!("use the right color")
874 Edges::default(),
875 transparent_black(),
876 );
877 }
878 }
879
880 fn paint_text(
881 &mut self,
882 text_bounds: Bounds<Pixels>,
883 layout: &mut LayoutState,
884 cx: &mut WindowContext,
885 ) {
886 let scroll_position = layout.position_map.snapshot.scroll_position();
887 let start_row = layout.visible_display_row_range.start;
888 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
889 let line_end_overshoot = 0.15 * layout.position_map.line_height;
890 let whitespace_setting = self
891 .editor
892 .read(cx)
893 .buffer
894 .read(cx)
895 .settings_at(0, cx)
896 .show_whitespaces;
897
898 cx.with_content_mask(
899 Some(ContentMask {
900 bounds: text_bounds,
901 }),
902 |cx| {
903 if text_bounds.contains_point(&cx.mouse_position()) {
904 if self
905 .editor
906 .read(cx)
907 .link_go_to_definition_state
908 .definitions
909 .is_empty()
910 {
911 cx.set_cursor_style(CursorStyle::IBeam);
912 } else {
913 cx.set_cursor_style(CursorStyle::PointingHand);
914 }
915 }
916
917 let fold_corner_radius = 0.15 * layout.position_map.line_height;
918 cx.with_element_id(Some("folds"), |cx| {
919 let snapshot = &layout.position_map.snapshot;
920 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
921 let fold_range = fold.range.clone();
922 let display_range = fold.range.start.to_display_point(&snapshot)
923 ..fold.range.end.to_display_point(&snapshot);
924 debug_assert_eq!(display_range.start.row(), display_range.end.row());
925 let row = display_range.start.row();
926
927 let line_layout = &layout.position_map.line_layouts
928 [(row - layout.visible_display_row_range.start) as usize]
929 .line;
930 let start_x = content_origin.x
931 + line_layout.x_for_index(display_range.start.column() as usize)
932 - layout.position_map.scroll_position.x;
933 let start_y = content_origin.y
934 + row as f32 * layout.position_map.line_height
935 - layout.position_map.scroll_position.y;
936 let end_x = content_origin.x
937 + line_layout.x_for_index(display_range.end.column() as usize)
938 - layout.position_map.scroll_position.x;
939
940 let fold_bounds = Bounds {
941 origin: point(start_x, start_y),
942 size: size(end_x - start_x, layout.position_map.line_height),
943 };
944
945 let fold_background = cx.with_z_index(1, |cx| {
946 div()
947 .id(fold.id)
948 .size_full()
949 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
950 .on_click(cx.listener_for(
951 &self.editor,
952 move |editor: &mut Editor, _, cx| {
953 editor.unfold_ranges(
954 [fold_range.start..fold_range.end],
955 true,
956 false,
957 cx,
958 );
959 cx.stop_propagation();
960 },
961 ))
962 .draw(
963 fold_bounds.origin,
964 fold_bounds.size,
965 cx,
966 |fold_element_state, cx| {
967 if fold_element_state.is_active() {
968 gpui::blue()
969 } else if fold_bounds.contains_point(&cx.mouse_position()) {
970 gpui::black()
971 } else {
972 gpui::red()
973 }
974 },
975 )
976 });
977
978 self.paint_highlighted_range(
979 display_range.clone(),
980 fold_background,
981 fold_corner_radius,
982 fold_corner_radius * 2.,
983 layout,
984 content_origin,
985 text_bounds,
986 cx,
987 );
988 }
989 });
990
991 for (range, color) in &layout.highlighted_ranges {
992 self.paint_highlighted_range(
993 range.clone(),
994 *color,
995 Pixels::ZERO,
996 line_end_overshoot,
997 layout,
998 content_origin,
999 text_bounds,
1000 cx,
1001 );
1002 }
1003
1004 let mut cursors = SmallVec::<[Cursor; 32]>::new();
1005 let corner_radius = 0.15 * layout.position_map.line_height;
1006 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
1007
1008 for (selection_style, selections) in &layout.selections {
1009 for selection in selections {
1010 self.paint_highlighted_range(
1011 selection.range.clone(),
1012 selection_style.selection,
1013 corner_radius,
1014 corner_radius * 2.,
1015 layout,
1016 content_origin,
1017 text_bounds,
1018 cx,
1019 );
1020
1021 if selection.is_local && !selection.range.is_empty() {
1022 invisible_display_ranges.push(selection.range.clone());
1023 }
1024
1025 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1026 let cursor_position = selection.head;
1027 if layout
1028 .visible_display_row_range
1029 .contains(&cursor_position.row())
1030 {
1031 let cursor_row_layout = &layout.position_map.line_layouts
1032 [(cursor_position.row() - start_row) as usize]
1033 .line;
1034 let cursor_column = cursor_position.column() as usize;
1035
1036 let cursor_character_x =
1037 cursor_row_layout.x_for_index(cursor_column);
1038 let mut block_width = cursor_row_layout
1039 .x_for_index(cursor_column + 1)
1040 - cursor_character_x;
1041 if block_width == Pixels::ZERO {
1042 block_width = layout.position_map.em_width;
1043 }
1044 let block_text = if let CursorShape::Block = selection.cursor_shape
1045 {
1046 layout
1047 .position_map
1048 .snapshot
1049 .chars_at(cursor_position)
1050 .next()
1051 .and_then(|(character, _)| {
1052 // todo!() currently shape_line panics if text conatins newlines
1053 let text = if character == '\n' {
1054 SharedString::from(" ")
1055 } else {
1056 SharedString::from(character.to_string())
1057 };
1058 let len = text.len();
1059 cx.text_system()
1060 .shape_line(
1061 text,
1062 cursor_row_layout.font_size,
1063 &[TextRun {
1064 len,
1065 font: self.style.text.font(),
1066 color: self.style.background,
1067 background_color: None,
1068 underline: None,
1069 }],
1070 )
1071 .log_err()
1072 })
1073 } else {
1074 None
1075 };
1076
1077 let x = cursor_character_x - layout.position_map.scroll_position.x;
1078 let y = cursor_position.row() as f32
1079 * layout.position_map.line_height
1080 - layout.position_map.scroll_position.y;
1081 if selection.is_newest {
1082 self.editor.update(cx, |editor, _| {
1083 editor.pixel_position_of_newest_cursor = Some(point(
1084 text_bounds.origin.x + x + block_width / 2.,
1085 text_bounds.origin.y
1086 + y
1087 + layout.position_map.line_height / 2.,
1088 ))
1089 });
1090 }
1091 cursors.push(Cursor {
1092 color: selection_style.cursor,
1093 block_width,
1094 origin: point(x, y),
1095 line_height: layout.position_map.line_height,
1096 shape: selection.cursor_shape,
1097 block_text,
1098 });
1099 }
1100 }
1101 }
1102 }
1103
1104 for (ix, line_with_invisibles) in
1105 layout.position_map.line_layouts.iter().enumerate()
1106 {
1107 let row = start_row + ix as u32;
1108 line_with_invisibles.draw(
1109 layout,
1110 row,
1111 content_origin,
1112 whitespace_setting,
1113 &invisible_display_ranges,
1114 cx,
1115 )
1116 }
1117
1118 cx.with_z_index(0, |cx| {
1119 for cursor in cursors {
1120 cursor.paint(content_origin, cx);
1121 }
1122 });
1123
1124 cx.with_z_index(1, |cx| {
1125 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1126 let available_space =
1127 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1128 let context_menu_size = context_menu.measure(available_space, cx);
1129
1130 let cursor_row_layout = &layout.position_map.line_layouts
1131 [(position.row() - start_row) as usize]
1132 .line;
1133 let x = cursor_row_layout.x_for_index(position.column() as usize)
1134 - layout.position_map.scroll_position.x;
1135 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1136 - layout.position_map.scroll_position.y;
1137 let mut list_origin = content_origin + point(x, y);
1138 let list_width = context_menu_size.width;
1139 let list_height = context_menu_size.height;
1140
1141 // Snap the right edge of the list to the right edge of the window if
1142 // its horizontal bounds overflow.
1143 if list_origin.x + list_width > cx.viewport_size().width {
1144 list_origin.x =
1145 (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1146 }
1147
1148 if list_origin.y + list_height > text_bounds.lower_right().y {
1149 list_origin.y -= layout.position_map.line_height + list_height;
1150 }
1151
1152 cx.break_content_mask(|cx| {
1153 context_menu.draw(list_origin, available_space, cx)
1154 });
1155 }
1156
1157 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1158 let available_space =
1159 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1160
1161 // This is safe because we check on layout whether the required row is available
1162 let hovered_row_layout = &layout.position_map.line_layouts
1163 [(position.row() - start_row) as usize]
1164 .line;
1165
1166 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1167 // height. This is the size we will use to decide whether to render popovers above or below
1168 // the hovered line.
1169 let first_size = hover_popovers[0].measure(available_space, cx);
1170 let height_to_reserve = first_size.height
1171 + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1172
1173 // Compute Hovered Point
1174 let x = hovered_row_layout.x_for_index(position.column() as usize)
1175 - layout.position_map.scroll_position.x;
1176 let y = position.row() as f32 * layout.position_map.line_height
1177 - layout.position_map.scroll_position.y;
1178 let hovered_point = content_origin + point(x, y);
1179
1180 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1181 // There is enough space above. Render popovers above the hovered point
1182 let mut current_y = hovered_point.y;
1183 for mut hover_popover in hover_popovers {
1184 let size = hover_popover.measure(available_space, cx);
1185 let mut popover_origin =
1186 point(hovered_point.x, current_y - size.height);
1187
1188 let x_out_of_bounds =
1189 text_bounds.upper_right().x - (popover_origin.x + size.width);
1190 if x_out_of_bounds < Pixels::ZERO {
1191 popover_origin.x = popover_origin.x + x_out_of_bounds;
1192 }
1193
1194 cx.break_content_mask(|cx| {
1195 hover_popover.draw(popover_origin, available_space, cx)
1196 });
1197
1198 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1199 }
1200 } else {
1201 // There is not enough space above. Render popovers below the hovered point
1202 let mut current_y = hovered_point.y + layout.position_map.line_height;
1203 for mut hover_popover in hover_popovers {
1204 let size = hover_popover.measure(available_space, cx);
1205 let mut popover_origin = point(hovered_point.x, current_y);
1206
1207 let x_out_of_bounds =
1208 text_bounds.upper_right().x - (popover_origin.x + size.width);
1209 if x_out_of_bounds < Pixels::ZERO {
1210 popover_origin.x = popover_origin.x + x_out_of_bounds;
1211 }
1212
1213 hover_popover.draw(popover_origin, available_space, cx);
1214
1215 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1216 }
1217 }
1218 }
1219
1220 if let Some(mouse_context_menu) =
1221 self.editor.read(cx).mouse_context_menu.as_ref()
1222 {
1223 let element = overlay()
1224 .position(mouse_context_menu.position)
1225 .child(mouse_context_menu.context_menu.clone())
1226 .anchor(AnchorCorner::TopLeft)
1227 .snap_to_window();
1228 element.draw(
1229 gpui::Point::default(),
1230 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1231 cx,
1232 |_, _| {},
1233 );
1234 }
1235 })
1236 },
1237 )
1238 }
1239
1240 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1241 bounds.upper_right().x - self.style.scrollbar_width
1242 }
1243
1244 fn paint_scrollbar(
1245 &mut self,
1246 bounds: Bounds<Pixels>,
1247 layout: &mut LayoutState,
1248 cx: &mut WindowContext,
1249 ) {
1250 if layout.mode != EditorMode::Full {
1251 return;
1252 }
1253
1254 let top = bounds.origin.y;
1255 let bottom = bounds.lower_left().y;
1256 let right = bounds.lower_right().x;
1257 let left = self.scrollbar_left(&bounds);
1258 let row_range = layout.scrollbar_row_range.clone();
1259 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1260
1261 let mut height = bounds.size.height;
1262 let mut first_row_y_offset = px(0.0);
1263
1264 // Impose a minimum height on the scrollbar thumb
1265 let row_height = height / max_row;
1266 let min_thumb_height = layout.position_map.line_height;
1267 let thumb_height = (row_range.end - row_range.start) * row_height;
1268 if thumb_height < min_thumb_height {
1269 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1270 height -= min_thumb_height - thumb_height;
1271 }
1272
1273 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1274
1275 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1276 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1277 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1278 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1279
1280 if layout.show_scrollbars {
1281 cx.paint_quad(
1282 track_bounds,
1283 Corners::default(),
1284 gpui::blue(), // todo!("style.track.background_color")
1285 Edges::default(), // todo!("style.track.border")
1286 transparent_black(), // todo!("style.track.border")
1287 );
1288 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1289 if layout.is_singleton && scrollbar_settings.selections {
1290 let start_anchor = Anchor::min();
1291 let end_anchor = Anchor::max();
1292 let background_ranges = self
1293 .editor
1294 .read(cx)
1295 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1296 start_anchor..end_anchor,
1297 &layout.position_map.snapshot,
1298 50000,
1299 );
1300 for range in background_ranges {
1301 let start_y = y_for_row(range.start().row() as f32);
1302 let mut end_y = y_for_row(range.end().row() as f32);
1303 if end_y - start_y < px(1.) {
1304 end_y = start_y + px(1.);
1305 }
1306 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1307 cx.paint_quad(
1308 bounds,
1309 Corners::default(),
1310 gpui::yellow(), // todo!("theme.editor.scrollbar")
1311 Edges {
1312 top: Pixels::ZERO,
1313 right: px(1.),
1314 bottom: Pixels::ZERO,
1315 left: px(1.),
1316 },
1317 gpui::green(), // todo!("style.thumb.border.color")
1318 );
1319 }
1320 }
1321
1322 if layout.is_singleton && scrollbar_settings.git_diff {
1323 for hunk in layout
1324 .position_map
1325 .snapshot
1326 .buffer_snapshot
1327 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1328 {
1329 let start_display = Point::new(hunk.buffer_range.start, 0)
1330 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1331 let end_display = Point::new(hunk.buffer_range.end, 0)
1332 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1333 let start_y = y_for_row(start_display.row() as f32);
1334 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1335 y_for_row((end_display.row() + 1) as f32)
1336 } else {
1337 y_for_row((end_display.row()) as f32)
1338 };
1339
1340 if end_y - start_y < px(1.) {
1341 end_y = start_y + px(1.);
1342 }
1343 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1344
1345 let color = match hunk.status() {
1346 DiffHunkStatus::Added => gpui::green(), // todo!("use the right color")
1347 DiffHunkStatus::Modified => gpui::yellow(), // todo!("use the right color")
1348 DiffHunkStatus::Removed => gpui::red(), // todo!("use the right color")
1349 };
1350 cx.paint_quad(
1351 bounds,
1352 Corners::default(),
1353 color,
1354 Edges {
1355 top: Pixels::ZERO,
1356 right: px(1.),
1357 bottom: Pixels::ZERO,
1358 left: px(1.),
1359 },
1360 gpui::green(), // todo!("style.thumb.border.color")
1361 );
1362 }
1363 }
1364
1365 cx.paint_quad(
1366 thumb_bounds,
1367 Corners::default(),
1368 gpui::black(), // todo!("style.thumb.background_color")
1369 Edges {
1370 top: Pixels::ZERO,
1371 right: px(1.),
1372 bottom: Pixels::ZERO,
1373 left: px(1.),
1374 },
1375 gpui::green(), // todo!("style.thumb.border.color")
1376 );
1377 }
1378
1379 let mouse_position = cx.mouse_position();
1380 if track_bounds.contains_point(&mouse_position) {
1381 cx.set_cursor_style(CursorStyle::Arrow);
1382 }
1383
1384 cx.on_mouse_event({
1385 let editor = self.editor.clone();
1386 move |event: &MouseMoveEvent, phase, cx| {
1387 if phase == DispatchPhase::Capture {
1388 return;
1389 }
1390
1391 editor.update(cx, |editor, cx| {
1392 if event.pressed_button == Some(MouseButton::Left)
1393 && editor.scroll_manager.is_dragging_scrollbar()
1394 {
1395 let y = mouse_position.y;
1396 let new_y = event.position.y;
1397 if thumb_top < y && y < thumb_bottom {
1398 let mut position = editor.scroll_position(cx);
1399 position.y += (new_y - y) * (max_row as f32) / height;
1400 if position.y < 0.0 {
1401 position.y = 0.0;
1402 }
1403 editor.set_scroll_position(position, cx);
1404 }
1405 cx.stop_propagation();
1406 } else {
1407 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1408 if track_bounds.contains_point(&event.position) {
1409 editor.scroll_manager.show_scrollbar(cx);
1410 }
1411 }
1412 })
1413 }
1414 });
1415
1416 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1417 cx.on_mouse_event({
1418 let editor = self.editor.clone();
1419 move |event: &MouseUpEvent, phase, cx| {
1420 editor.update(cx, |editor, cx| {
1421 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1422 cx.stop_propagation();
1423 });
1424 }
1425 });
1426 } else {
1427 cx.on_mouse_event({
1428 let editor = self.editor.clone();
1429 move |event: &MouseDownEvent, phase, cx| {
1430 editor.update(cx, |editor, cx| {
1431 if track_bounds.contains_point(&event.position) {
1432 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1433
1434 let y = event.position.y;
1435 if y < thumb_top || thumb_bottom < y {
1436 let center_row =
1437 ((y - top) * max_row as f32 / height).round() as u32;
1438 let top_row = center_row
1439 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1440 let mut position = editor.scroll_position(cx);
1441 position.y = top_row as f32;
1442 editor.set_scroll_position(position, cx);
1443 } else {
1444 editor.scroll_manager.show_scrollbar(cx);
1445 }
1446
1447 cx.stop_propagation();
1448 }
1449 });
1450 }
1451 });
1452 }
1453 }
1454
1455 #[allow(clippy::too_many_arguments)]
1456 fn paint_highlighted_range(
1457 &self,
1458 range: Range<DisplayPoint>,
1459 color: Hsla,
1460 corner_radius: Pixels,
1461 line_end_overshoot: Pixels,
1462 layout: &LayoutState,
1463 content_origin: gpui::Point<Pixels>,
1464 bounds: Bounds<Pixels>,
1465 cx: &mut WindowContext,
1466 ) {
1467 let start_row = layout.visible_display_row_range.start;
1468 let end_row = layout.visible_display_row_range.end;
1469 if range.start != range.end {
1470 let row_range = if range.end.column() == 0 {
1471 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1472 } else {
1473 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1474 };
1475
1476 let highlighted_range = HighlightedRange {
1477 color,
1478 line_height: layout.position_map.line_height,
1479 corner_radius,
1480 start_y: content_origin.y
1481 + row_range.start as f32 * layout.position_map.line_height
1482 - layout.position_map.scroll_position.y,
1483 lines: row_range
1484 .into_iter()
1485 .map(|row| {
1486 let line_layout =
1487 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1488 HighlightedRangeLine {
1489 start_x: if row == range.start.row() {
1490 content_origin.x
1491 + line_layout.x_for_index(range.start.column() as usize)
1492 - layout.position_map.scroll_position.x
1493 } else {
1494 content_origin.x - layout.position_map.scroll_position.x
1495 },
1496 end_x: if row == range.end.row() {
1497 content_origin.x
1498 + line_layout.x_for_index(range.end.column() as usize)
1499 - layout.position_map.scroll_position.x
1500 } else {
1501 content_origin.x + line_layout.width + line_end_overshoot
1502 - layout.position_map.scroll_position.x
1503 },
1504 }
1505 })
1506 .collect(),
1507 };
1508
1509 highlighted_range.paint(bounds, cx);
1510 }
1511 }
1512
1513 fn paint_blocks(
1514 &mut self,
1515 bounds: Bounds<Pixels>,
1516 layout: &mut LayoutState,
1517 cx: &mut WindowContext,
1518 ) {
1519 let scroll_position = layout.position_map.snapshot.scroll_position();
1520 let scroll_left = scroll_position.x * layout.position_map.em_width;
1521 let scroll_top = scroll_position.y * layout.position_map.line_height;
1522
1523 for block in layout.blocks.drain(..) {
1524 let mut origin = bounds.origin
1525 + point(
1526 Pixels::ZERO,
1527 block.row as f32 * layout.position_map.line_height - scroll_top,
1528 );
1529 if !matches!(block.style, BlockStyle::Sticky) {
1530 origin += point(-scroll_left, Pixels::ZERO);
1531 }
1532 block.element.draw(origin, block.available_space, cx);
1533 }
1534 }
1535
1536 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1537 let style = &self.style;
1538 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1539 let layout = cx
1540 .text_system()
1541 .shape_line(
1542 SharedString::from(" ".repeat(column)),
1543 font_size,
1544 &[TextRun {
1545 len: column,
1546 font: style.text.font(),
1547 color: Hsla::default(),
1548 background_color: None,
1549 underline: None,
1550 }],
1551 )
1552 .unwrap();
1553
1554 layout.width
1555 }
1556
1557 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1558 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1559 self.column_pixels(digit_count, cx)
1560 }
1561
1562 //Folds contained in a hunk are ignored apart from shrinking visual size
1563 //If a fold contains any hunks then that fold line is marked as modified
1564 fn layout_git_gutters(
1565 &self,
1566 display_rows: Range<u32>,
1567 snapshot: &EditorSnapshot,
1568 ) -> Vec<DisplayDiffHunk> {
1569 let buffer_snapshot = &snapshot.buffer_snapshot;
1570
1571 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1572 .to_point(snapshot)
1573 .row;
1574 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1575 .to_point(snapshot)
1576 .row;
1577
1578 buffer_snapshot
1579 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1580 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1581 .dedup()
1582 .collect()
1583 }
1584
1585 fn calculate_relative_line_numbers(
1586 &self,
1587 snapshot: &EditorSnapshot,
1588 rows: &Range<u32>,
1589 relative_to: Option<u32>,
1590 ) -> HashMap<u32, u32> {
1591 let mut relative_rows: HashMap<u32, u32> = Default::default();
1592 let Some(relative_to) = relative_to else {
1593 return relative_rows;
1594 };
1595
1596 let start = rows.start.min(relative_to);
1597 let end = rows.end.max(relative_to);
1598
1599 let buffer_rows = snapshot
1600 .buffer_rows(start)
1601 .take(1 + (end - start) as usize)
1602 .collect::<Vec<_>>();
1603
1604 let head_idx = relative_to - start;
1605 let mut delta = 1;
1606 let mut i = head_idx + 1;
1607 while i < buffer_rows.len() as u32 {
1608 if buffer_rows[i as usize].is_some() {
1609 if rows.contains(&(i + start)) {
1610 relative_rows.insert(i + start, delta);
1611 }
1612 delta += 1;
1613 }
1614 i += 1;
1615 }
1616 delta = 1;
1617 i = head_idx.min(buffer_rows.len() as u32 - 1);
1618 while i > 0 && buffer_rows[i as usize].is_none() {
1619 i -= 1;
1620 }
1621
1622 while i > 0 {
1623 i -= 1;
1624 if buffer_rows[i as usize].is_some() {
1625 if rows.contains(&(i + start)) {
1626 relative_rows.insert(i + start, delta);
1627 }
1628 delta += 1;
1629 }
1630 }
1631
1632 relative_rows
1633 }
1634
1635 fn shape_line_numbers(
1636 &self,
1637 rows: Range<u32>,
1638 active_rows: &BTreeMap<u32, bool>,
1639 newest_selection_head: DisplayPoint,
1640 is_singleton: bool,
1641 snapshot: &EditorSnapshot,
1642 cx: &ViewContext<Editor>,
1643 ) -> (
1644 Vec<Option<ShapedLine>>,
1645 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1646 ) {
1647 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1648 let include_line_numbers = snapshot.mode == EditorMode::Full;
1649 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1650 let mut fold_statuses = Vec::with_capacity(rows.len());
1651 let mut line_number = String::new();
1652 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1653 let relative_to = if is_relative {
1654 Some(newest_selection_head.row())
1655 } else {
1656 None
1657 };
1658
1659 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1660
1661 for (ix, row) in snapshot
1662 .buffer_rows(rows.start)
1663 .take((rows.end - rows.start) as usize)
1664 .enumerate()
1665 {
1666 let display_row = rows.start + ix as u32;
1667 let (active, color) = if active_rows.contains_key(&display_row) {
1668 (true, cx.theme().colors().editor_active_line_number)
1669 } else {
1670 (false, cx.theme().colors().editor_line_number)
1671 };
1672 if let Some(buffer_row) = row {
1673 if include_line_numbers {
1674 line_number.clear();
1675 let default_number = buffer_row + 1;
1676 let number = relative_rows
1677 .get(&(ix as u32 + rows.start))
1678 .unwrap_or(&default_number);
1679 write!(&mut line_number, "{}", number).unwrap();
1680 let run = TextRun {
1681 len: line_number.len(),
1682 font: self.style.text.font(),
1683 color,
1684 background_color: None,
1685 underline: None,
1686 };
1687 let shaped_line = cx
1688 .text_system()
1689 .shape_line(line_number.clone().into(), font_size, &[run])
1690 .unwrap();
1691 shaped_line_numbers.push(Some(shaped_line));
1692 fold_statuses.push(
1693 is_singleton
1694 .then(|| {
1695 snapshot
1696 .fold_for_line(buffer_row)
1697 .map(|fold_status| (fold_status, buffer_row, active))
1698 })
1699 .flatten(),
1700 )
1701 }
1702 } else {
1703 fold_statuses.push(None);
1704 shaped_line_numbers.push(None);
1705 }
1706 }
1707
1708 (shaped_line_numbers, fold_statuses)
1709 }
1710
1711 fn layout_lines(
1712 &self,
1713 rows: Range<u32>,
1714 line_number_layouts: &[Option<ShapedLine>],
1715 snapshot: &EditorSnapshot,
1716 cx: &ViewContext<Editor>,
1717 ) -> Vec<LineWithInvisibles> {
1718 if rows.start >= rows.end {
1719 return Vec::new();
1720 }
1721
1722 // When the editor is empty and unfocused, then show the placeholder.
1723 if snapshot.is_empty() {
1724 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1725 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1726 let placeholder_text = snapshot.placeholder_text();
1727 let placeholder_lines = placeholder_text
1728 .as_ref()
1729 .map_or("", AsRef::as_ref)
1730 .split('\n')
1731 .skip(rows.start as usize)
1732 .chain(iter::repeat(""))
1733 .take(rows.len());
1734 placeholder_lines
1735 .filter_map(move |line| {
1736 let run = TextRun {
1737 len: line.len(),
1738 font: self.style.text.font(),
1739 color: placeholder_color,
1740 background_color: None,
1741 underline: Default::default(),
1742 };
1743 cx.text_system()
1744 .shape_line(line.to_string().into(), font_size, &[run])
1745 .log_err()
1746 })
1747 .map(|line| LineWithInvisibles {
1748 line,
1749 invisibles: Vec::new(),
1750 })
1751 .collect()
1752 } else {
1753 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1754 LineWithInvisibles::from_chunks(
1755 chunks,
1756 &self.style.text,
1757 MAX_LINE_LEN,
1758 rows.len() as usize,
1759 line_number_layouts,
1760 snapshot.mode,
1761 cx,
1762 )
1763 }
1764 }
1765
1766 fn compute_layout(
1767 &mut self,
1768 mut bounds: Bounds<Pixels>,
1769 cx: &mut WindowContext,
1770 ) -> LayoutState {
1771 self.editor.update(cx, |editor, cx| {
1772 let snapshot = editor.snapshot(cx);
1773 let style = self.style.clone();
1774
1775 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1776 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1777 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1778 let em_width = cx
1779 .text_system()
1780 .typographic_bounds(font_id, font_size, 'm')
1781 .unwrap()
1782 .size
1783 .width;
1784 let em_advance = cx
1785 .text_system()
1786 .advance(font_id, font_size, 'm')
1787 .unwrap()
1788 .width;
1789
1790 let gutter_padding;
1791 let gutter_width;
1792 let gutter_margin;
1793 if snapshot.show_gutter {
1794 let descent = cx.text_system().descent(font_id, font_size);
1795
1796 let gutter_padding_factor = 3.5;
1797 gutter_padding = (em_width * gutter_padding_factor).round();
1798 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1799 gutter_margin = -descent;
1800 } else {
1801 gutter_padding = Pixels::ZERO;
1802 gutter_width = Pixels::ZERO;
1803 gutter_margin = Pixels::ZERO;
1804 };
1805
1806 editor.gutter_width = gutter_width;
1807
1808 let text_width = bounds.size.width - gutter_width;
1809 let overscroll = size(em_width, px(0.));
1810 let snapshot = {
1811 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1812
1813 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1814 let wrap_width = match editor.soft_wrap_mode(cx) {
1815 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1816 SoftWrap::EditorWidth => editor_width,
1817 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1818 };
1819
1820 if editor.set_wrap_width(Some(wrap_width), cx) {
1821 editor.snapshot(cx)
1822 } else {
1823 snapshot
1824 }
1825 };
1826
1827 let wrap_guides = editor
1828 .wrap_guides(cx)
1829 .iter()
1830 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1831 .collect::<SmallVec<[_; 2]>>();
1832
1833 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1834 let gutter_size = size(gutter_width, bounds.size.height);
1835 let text_size = size(text_width, bounds.size.height);
1836
1837 let autoscroll_horizontally =
1838 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1839 let mut snapshot = editor.snapshot(cx);
1840
1841 let scroll_position = snapshot.scroll_position();
1842 // The scroll position is a fractional point, the whole number of which represents
1843 // the top of the window in terms of display rows.
1844 let start_row = scroll_position.y as u32;
1845 let height_in_lines = f32::from(bounds.size.height / line_height);
1846 let max_row = snapshot.max_point().row();
1847
1848 // Add 1 to ensure selections bleed off screen
1849 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1850
1851 let start_anchor = if start_row == 0 {
1852 Anchor::min()
1853 } else {
1854 snapshot
1855 .buffer_snapshot
1856 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1857 };
1858 let end_anchor = if end_row > max_row {
1859 Anchor::max()
1860 } else {
1861 snapshot
1862 .buffer_snapshot
1863 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1864 };
1865
1866 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1867 let mut active_rows = BTreeMap::new();
1868 let is_singleton = editor.is_singleton(cx);
1869
1870 let highlighted_rows = editor.highlighted_rows();
1871 let highlighted_ranges = editor.background_highlights_in_range(
1872 start_anchor..end_anchor,
1873 &snapshot.display_snapshot,
1874 cx.theme().colors(),
1875 );
1876
1877 let mut newest_selection_head = None;
1878
1879 if editor.show_local_selections {
1880 let mut local_selections: Vec<Selection<Point>> = editor
1881 .selections
1882 .disjoint_in_range(start_anchor..end_anchor, cx);
1883 local_selections.extend(editor.selections.pending(cx));
1884 let mut layouts = Vec::new();
1885 let newest = editor.selections.newest(cx);
1886 for selection in local_selections.drain(..) {
1887 let is_empty = selection.start == selection.end;
1888 let is_newest = selection == newest;
1889
1890 let layout = SelectionLayout::new(
1891 selection,
1892 editor.selections.line_mode,
1893 editor.cursor_shape,
1894 &snapshot.display_snapshot,
1895 is_newest,
1896 true,
1897 );
1898 if is_newest {
1899 newest_selection_head = Some(layout.head);
1900 }
1901
1902 for row in cmp::max(layout.active_rows.start, start_row)
1903 ..=cmp::min(layout.active_rows.end, end_row)
1904 {
1905 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1906 *contains_non_empty_selection |= !is_empty;
1907 }
1908 layouts.push(layout);
1909 }
1910
1911 selections.push((style.local_player, layouts));
1912 }
1913
1914 if let Some(collaboration_hub) = &editor.collaboration_hub {
1915 // When following someone, render the local selections in their color.
1916 if let Some(leader_id) = editor.leader_peer_id {
1917 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1918 if let Some(participant_index) = collaboration_hub
1919 .user_participant_indices(cx)
1920 .get(&collaborator.user_id)
1921 {
1922 if let Some((local_selection_style, _)) = selections.first_mut() {
1923 *local_selection_style = cx
1924 .theme()
1925 .players()
1926 .color_for_participant(participant_index.0);
1927 }
1928 }
1929 }
1930 }
1931
1932 let mut remote_selections = HashMap::default();
1933 for selection in snapshot.remote_selections_in_range(
1934 &(start_anchor..end_anchor),
1935 collaboration_hub.as_ref(),
1936 cx,
1937 ) {
1938 let selection_style = if let Some(participant_index) = selection.participant_index {
1939 cx.theme()
1940 .players()
1941 .color_for_participant(participant_index.0)
1942 } else {
1943 cx.theme().players().absent()
1944 };
1945
1946 // Don't re-render the leader's selections, since the local selections
1947 // match theirs.
1948 if Some(selection.peer_id) == editor.leader_peer_id {
1949 continue;
1950 }
1951
1952 remote_selections
1953 .entry(selection.replica_id)
1954 .or_insert((selection_style, Vec::new()))
1955 .1
1956 .push(SelectionLayout::new(
1957 selection.selection,
1958 selection.line_mode,
1959 selection.cursor_shape,
1960 &snapshot.display_snapshot,
1961 false,
1962 false,
1963 ));
1964 }
1965
1966 selections.extend(remote_selections.into_values());
1967 }
1968
1969 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1970 let show_scrollbars = match scrollbar_settings.show {
1971 ShowScrollbar::Auto => {
1972 // Git
1973 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1974 ||
1975 // Selections
1976 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1977 // Scrollmanager
1978 || editor.scroll_manager.scrollbars_visible()
1979 }
1980 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1981 ShowScrollbar::Always => true,
1982 ShowScrollbar::Never => false,
1983 };
1984
1985 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1986 let newest = editor.selections.newest::<Point>(cx);
1987 SelectionLayout::new(
1988 newest,
1989 editor.selections.line_mode,
1990 editor.cursor_shape,
1991 &snapshot.display_snapshot,
1992 true,
1993 true,
1994 )
1995 .head
1996 });
1997
1998 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1999 start_row..end_row,
2000 &active_rows,
2001 head_for_relative,
2002 is_singleton,
2003 &snapshot,
2004 cx,
2005 );
2006
2007 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2008
2009 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2010
2011 let mut max_visible_line_width = Pixels::ZERO;
2012 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2013 for line_with_invisibles in &line_layouts {
2014 if line_with_invisibles.line.width > max_visible_line_width {
2015 max_visible_line_width = line_with_invisibles.line.width;
2016 }
2017 }
2018
2019 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2020 .unwrap()
2021 .width;
2022 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2023
2024 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2025 self.layout_blocks(
2026 start_row..end_row,
2027 &snapshot,
2028 bounds.size.width,
2029 scroll_width,
2030 gutter_padding,
2031 gutter_width,
2032 em_width,
2033 gutter_width + gutter_margin,
2034 line_height,
2035 &style,
2036 &line_layouts,
2037 editor,
2038 cx,
2039 )
2040 });
2041
2042 let scroll_max = point(
2043 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2044 max_row as f32,
2045 );
2046
2047 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2048
2049 let autoscrolled = if autoscroll_horizontally {
2050 editor.autoscroll_horizontally(
2051 start_row,
2052 text_size.width,
2053 scroll_width,
2054 em_width,
2055 &line_layouts,
2056 cx,
2057 )
2058 } else {
2059 false
2060 };
2061
2062 if clamped || autoscrolled {
2063 snapshot = editor.snapshot(cx);
2064 }
2065
2066 let mut context_menu = None;
2067 let mut code_actions_indicator = None;
2068 if let Some(newest_selection_head) = newest_selection_head {
2069 if (start_row..end_row).contains(&newest_selection_head.row()) {
2070 if editor.context_menu_visible() {
2071 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2072 context_menu =
2073 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2074 }
2075
2076 let active = matches!(
2077 editor.context_menu.read().as_ref(),
2078 Some(crate::ContextMenu::CodeActions(_))
2079 );
2080
2081 code_actions_indicator = editor
2082 .render_code_actions_indicator(&style, active, cx)
2083 .map(|element| CodeActionsIndicator {
2084 row: newest_selection_head.row(),
2085 button: element,
2086 });
2087 }
2088 }
2089
2090 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2091 let max_size = size(
2092 (120. * em_width) // Default size
2093 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2094 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2095 (16. * line_height) // Default size
2096 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2097 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2098 );
2099
2100 let mut hover = editor.hover_state.render(
2101 &snapshot,
2102 &style,
2103 visible_rows,
2104 max_size,
2105 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2106 cx,
2107 );
2108
2109 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2110 editor.render_fold_indicators(
2111 fold_statuses,
2112 &style,
2113 editor.gutter_hovered,
2114 line_height,
2115 gutter_margin,
2116 cx,
2117 )
2118 });
2119
2120 let invisible_symbol_font_size = font_size / 2.;
2121 let tab_invisible = cx
2122 .text_system()
2123 .shape_line(
2124 "→".into(),
2125 invisible_symbol_font_size,
2126 &[TextRun {
2127 len: "→".len(),
2128 font: self.style.text.font(),
2129 color: cx.theme().colors().editor_invisible,
2130 background_color: None,
2131 underline: None,
2132 }],
2133 )
2134 .unwrap();
2135 let space_invisible = cx
2136 .text_system()
2137 .shape_line(
2138 "•".into(),
2139 invisible_symbol_font_size,
2140 &[TextRun {
2141 len: "•".len(),
2142 font: self.style.text.font(),
2143 color: cx.theme().colors().editor_invisible,
2144 background_color: None,
2145 underline: None,
2146 }],
2147 )
2148 .unwrap();
2149
2150 LayoutState {
2151 mode: snapshot.mode,
2152 position_map: Arc::new(PositionMap {
2153 size: bounds.size,
2154 scroll_position: point(
2155 scroll_position.x * em_width,
2156 scroll_position.y * line_height,
2157 ),
2158 scroll_max,
2159 line_layouts,
2160 line_height,
2161 em_width,
2162 em_advance,
2163 snapshot,
2164 }),
2165 visible_anchor_range: start_anchor..end_anchor,
2166 visible_display_row_range: start_row..end_row,
2167 wrap_guides,
2168 gutter_size,
2169 gutter_padding,
2170 text_size,
2171 scrollbar_row_range,
2172 show_scrollbars,
2173 is_singleton,
2174 max_row,
2175 gutter_margin,
2176 active_rows,
2177 highlighted_rows,
2178 highlighted_ranges,
2179 line_numbers,
2180 display_hunks,
2181 blocks,
2182 selections,
2183 context_menu,
2184 code_actions_indicator,
2185 fold_indicators,
2186 tab_invisible,
2187 space_invisible,
2188 hover_popovers: hover,
2189 }
2190 })
2191 }
2192
2193 #[allow(clippy::too_many_arguments)]
2194 fn layout_blocks(
2195 &self,
2196 rows: Range<u32>,
2197 snapshot: &EditorSnapshot,
2198 editor_width: Pixels,
2199 scroll_width: Pixels,
2200 gutter_padding: Pixels,
2201 gutter_width: Pixels,
2202 em_width: Pixels,
2203 text_x: Pixels,
2204 line_height: Pixels,
2205 style: &EditorStyle,
2206 line_layouts: &[LineWithInvisibles],
2207 editor: &mut Editor,
2208 cx: &mut ViewContext<Editor>,
2209 ) -> (Pixels, Vec<BlockLayout>) {
2210 let mut block_id = 0;
2211 let scroll_x = snapshot.scroll_anchor.offset.x;
2212 let (fixed_blocks, non_fixed_blocks) = snapshot
2213 .blocks_in_range(rows.clone())
2214 .partition::<Vec<_>, _>(|(_, block)| match block {
2215 TransformBlock::ExcerptHeader { .. } => false,
2216 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2217 });
2218
2219 let mut render_block = |block: &TransformBlock,
2220 available_space: Size<AvailableSpace>,
2221 block_id: usize,
2222 editor: &mut Editor,
2223 cx: &mut ViewContext<Editor>| {
2224 let mut element = match block {
2225 TransformBlock::Custom(block) => {
2226 let align_to = block
2227 .position()
2228 .to_point(&snapshot.buffer_snapshot)
2229 .to_display_point(snapshot);
2230 let anchor_x = text_x
2231 + if rows.contains(&align_to.row()) {
2232 line_layouts[(align_to.row() - rows.start) as usize]
2233 .line
2234 .x_for_index(align_to.column() as usize)
2235 } else {
2236 layout_line(align_to.row(), snapshot, style, cx)
2237 .unwrap()
2238 .x_for_index(align_to.column() as usize)
2239 };
2240
2241 block.render(&mut BlockContext {
2242 view_context: cx,
2243 anchor_x,
2244 gutter_padding,
2245 line_height,
2246 gutter_width,
2247 em_width,
2248 block_id,
2249 editor_style: &self.style,
2250 })
2251 }
2252
2253 TransformBlock::ExcerptHeader {
2254 buffer,
2255 range,
2256 starts_new_buffer,
2257 ..
2258 } => {
2259 let include_root = editor
2260 .project
2261 .as_ref()
2262 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2263 .unwrap_or_default();
2264
2265 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2266 let jump_path = ProjectPath {
2267 worktree_id: file.worktree_id(cx),
2268 path: file.path.clone(),
2269 };
2270 let jump_anchor = range
2271 .primary
2272 .as_ref()
2273 .map_or(range.context.start, |primary| primary.start);
2274 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2275
2276 let jump_handler = cx.listener_for(&self.editor, move |editor, e, cx| {
2277 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2278 });
2279
2280 jump_handler
2281 });
2282
2283 let element = if *starts_new_buffer {
2284 let path = buffer.resolve_file_path(cx, include_root);
2285 let mut filename = None;
2286 let mut parent_path = None;
2287 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2288 if let Some(path) = path {
2289 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2290 parent_path = path
2291 .parent()
2292 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2293 }
2294
2295 let is_open = true;
2296
2297 div().id("path header container").size_full().p_1p5().child(
2298 h_stack()
2299 .id("path header block")
2300 .py_1p5()
2301 .pl_3()
2302 .pr_2()
2303 .rounded_lg()
2304 .shadow_md()
2305 .border()
2306 .border_color(cx.theme().colors().border)
2307 .bg(cx.theme().colors().editor_subheader_background)
2308 .justify_between()
2309 .cursor_pointer()
2310 .hover(|style| style.bg(cx.theme().colors().element_hover))
2311 .on_click(cx.listener(|_editor, _event, _cx| {
2312 // TODO: Implement collapsing path headers
2313 todo!("Clicking path header")
2314 }))
2315 .child(
2316 h_stack()
2317 .gap_3()
2318 // TODO: Add open/close state and toggle action
2319 .child(
2320 div().border().border_color(gpui::red()).child(
2321 ButtonLike::new("path-header-disclosure-control")
2322 .style(ButtonStyle::Subtle)
2323 .child(IconElement::new(match is_open {
2324 true => Icon::ChevronDown,
2325 false => Icon::ChevronRight,
2326 })),
2327 ),
2328 )
2329 .child(
2330 h_stack()
2331 .gap_2()
2332 .child(Label::new(
2333 filename
2334 .map(SharedString::from)
2335 .unwrap_or_else(|| "untitled".into()),
2336 ))
2337 .when_some(parent_path, |then, path| {
2338 then.child(Label::new(path).color(Color::Muted))
2339 }),
2340 ),
2341 )
2342 .children(jump_handler.map(|jump_handler| {
2343 IconButton::new(block_id, Icon::ArrowUpRight)
2344 .style(ButtonStyle::Subtle)
2345 .on_click(jump_handler)
2346 .tooltip(|cx| {
2347 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2348 })
2349 })), // .p_x(gutter_padding)
2350 )
2351 } else {
2352 let text_style = style.text.clone();
2353 h_stack()
2354 .id("collapsed context")
2355 .size_full()
2356 .gap(gutter_padding)
2357 .child(
2358 h_stack()
2359 .justify_end()
2360 .flex_none()
2361 .w(gutter_width - gutter_padding)
2362 .h_full()
2363 .text_buffer(cx)
2364 .text_color(cx.theme().colors().editor_line_number)
2365 .child("..."),
2366 )
2367 .map(|this| {
2368 if let Some(jump_handler) = jump_handler {
2369 this.child(
2370 ButtonLike::new("jump to collapsed context")
2371 .style(ButtonStyle::Transparent)
2372 .full_width()
2373 .on_click(jump_handler)
2374 .tooltip(|cx| {
2375 Tooltip::for_action(
2376 "Jump to Buffer",
2377 &OpenExcerpts,
2378 cx,
2379 )
2380 })
2381 .child(
2382 div()
2383 .h_px()
2384 .w_full()
2385 .bg(cx.theme().colors().border_variant)
2386 .group_hover("", |style| {
2387 style.bg(cx.theme().colors().border)
2388 }),
2389 ),
2390 )
2391 } else {
2392 this.child(div().size_full().bg(gpui::green()))
2393 }
2394 })
2395 // .child("⋯")
2396 // .children(jump_icon) // .p_x(gutter_padding)
2397 };
2398 element.into_any()
2399 }
2400 };
2401
2402 let size = element.measure(available_space, cx);
2403 (element, size)
2404 };
2405
2406 let mut fixed_block_max_width = Pixels::ZERO;
2407 let mut blocks = Vec::new();
2408 for (row, block) in fixed_blocks {
2409 let available_space = size(
2410 AvailableSpace::MinContent,
2411 AvailableSpace::Definite(block.height() as f32 * line_height),
2412 );
2413 let (element, element_size) =
2414 render_block(block, available_space, block_id, editor, cx);
2415 block_id += 1;
2416 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2417 blocks.push(BlockLayout {
2418 row,
2419 element,
2420 available_space,
2421 style: BlockStyle::Fixed,
2422 });
2423 }
2424 for (row, block) in non_fixed_blocks {
2425 let style = match block {
2426 TransformBlock::Custom(block) => block.style(),
2427 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2428 };
2429 let width = match style {
2430 BlockStyle::Sticky => editor_width,
2431 BlockStyle::Flex => editor_width
2432 .max(fixed_block_max_width)
2433 .max(gutter_width + scroll_width),
2434 BlockStyle::Fixed => unreachable!(),
2435 };
2436 let available_space = size(
2437 AvailableSpace::Definite(width),
2438 AvailableSpace::Definite(block.height() as f32 * line_height),
2439 );
2440 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2441 block_id += 1;
2442 blocks.push(BlockLayout {
2443 row,
2444 element,
2445 available_space,
2446 style,
2447 });
2448 }
2449 (
2450 scroll_width.max(fixed_block_max_width - gutter_width),
2451 blocks,
2452 )
2453 }
2454
2455 fn paint_mouse_listeners(
2456 &mut self,
2457 bounds: Bounds<Pixels>,
2458 gutter_bounds: Bounds<Pixels>,
2459 text_bounds: Bounds<Pixels>,
2460 layout: &LayoutState,
2461 cx: &mut WindowContext,
2462 ) {
2463 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2464 let interactive_bounds = InteractiveBounds {
2465 bounds: bounds.intersect(&cx.content_mask().bounds),
2466 stacking_order: cx.stacking_order().clone(),
2467 };
2468
2469 cx.on_mouse_event({
2470 let position_map = layout.position_map.clone();
2471 let editor = self.editor.clone();
2472 let interactive_bounds = interactive_bounds.clone();
2473
2474 move |event: &ScrollWheelEvent, phase, cx| {
2475 if phase != DispatchPhase::Bubble {
2476 return;
2477 }
2478
2479 editor.update(cx, |editor, cx| {
2480 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2481 });
2482 }
2483 });
2484
2485 cx.on_mouse_event({
2486 let position_map = layout.position_map.clone();
2487 let editor = self.editor.clone();
2488 let stacking_order = cx.stacking_order().clone();
2489
2490 move |event: &MouseDownEvent, phase, cx| {
2491 if phase != DispatchPhase::Bubble {
2492 return;
2493 }
2494
2495 match event.button {
2496 MouseButton::Left => editor.update(cx, |editor, cx| {
2497 Self::mouse_left_down(
2498 editor,
2499 event,
2500 &position_map,
2501 text_bounds,
2502 gutter_bounds,
2503 &stacking_order,
2504 cx,
2505 )
2506 }),
2507 MouseButton::Right => editor.update(cx, |editor, cx| {
2508 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx)
2509 }),
2510 _ => {}
2511 };
2512 }
2513 });
2514
2515 cx.on_mouse_event({
2516 let position_map = layout.position_map.clone();
2517 let editor = self.editor.clone();
2518 let stacking_order = cx.stacking_order().clone();
2519
2520 move |event: &MouseUpEvent, phase, cx| {
2521 editor.update(cx, |editor, cx| {
2522 Self::mouse_up(
2523 editor,
2524 event,
2525 &position_map,
2526 text_bounds,
2527 &stacking_order,
2528 cx,
2529 )
2530 });
2531 }
2532 });
2533 cx.on_mouse_event({
2534 let position_map = layout.position_map.clone();
2535 let editor = self.editor.clone();
2536 let stacking_order = cx.stacking_order().clone();
2537
2538 move |event: &MouseMoveEvent, phase, cx| {
2539 if phase != DispatchPhase::Bubble {
2540 return;
2541 }
2542
2543 editor.update(cx, |editor, cx| {
2544 Self::mouse_moved(
2545 editor,
2546 event,
2547 &position_map,
2548 text_bounds,
2549 gutter_bounds,
2550 &stacking_order,
2551 cx,
2552 )
2553 });
2554 }
2555 });
2556 }
2557}
2558
2559#[derive(Debug)]
2560pub struct LineWithInvisibles {
2561 pub line: ShapedLine,
2562 invisibles: Vec<Invisible>,
2563}
2564
2565impl LineWithInvisibles {
2566 fn from_chunks<'a>(
2567 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2568 text_style: &TextStyle,
2569 max_line_len: usize,
2570 max_line_count: usize,
2571 line_number_layouts: &[Option<ShapedLine>],
2572 editor_mode: EditorMode,
2573 cx: &WindowContext,
2574 ) -> Vec<Self> {
2575 let mut layouts = Vec::with_capacity(max_line_count);
2576 let mut line = String::new();
2577 let mut invisibles = Vec::new();
2578 let mut styles = Vec::new();
2579 let mut non_whitespace_added = false;
2580 let mut row = 0;
2581 let mut line_exceeded_max_len = false;
2582 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2583
2584 for highlighted_chunk in chunks.chain([HighlightedChunk {
2585 chunk: "\n",
2586 style: None,
2587 is_tab: false,
2588 }]) {
2589 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2590 if ix > 0 {
2591 let shaped_line = cx
2592 .text_system()
2593 .shape_line(line.clone().into(), font_size, &styles)
2594 .unwrap();
2595 layouts.push(Self {
2596 line: shaped_line,
2597 invisibles: invisibles.drain(..).collect(),
2598 });
2599
2600 line.clear();
2601 styles.clear();
2602 row += 1;
2603 line_exceeded_max_len = false;
2604 non_whitespace_added = false;
2605 if row == max_line_count {
2606 return layouts;
2607 }
2608 }
2609
2610 if !line_chunk.is_empty() && !line_exceeded_max_len {
2611 let text_style = if let Some(style) = highlighted_chunk.style {
2612 Cow::Owned(text_style.clone().highlight(style))
2613 } else {
2614 Cow::Borrowed(text_style)
2615 };
2616
2617 if line.len() + line_chunk.len() > max_line_len {
2618 let mut chunk_len = max_line_len - line.len();
2619 while !line_chunk.is_char_boundary(chunk_len) {
2620 chunk_len -= 1;
2621 }
2622 line_chunk = &line_chunk[..chunk_len];
2623 line_exceeded_max_len = true;
2624 }
2625
2626 styles.push(TextRun {
2627 len: line_chunk.len(),
2628 font: text_style.font(),
2629 color: text_style.color,
2630 background_color: text_style.background_color,
2631 underline: text_style.underline,
2632 });
2633
2634 if editor_mode == EditorMode::Full {
2635 // Line wrap pads its contents with fake whitespaces,
2636 // avoid printing them
2637 let inside_wrapped_string = line_number_layouts
2638 .get(row)
2639 .and_then(|layout| layout.as_ref())
2640 .is_none();
2641 if highlighted_chunk.is_tab {
2642 if non_whitespace_added || !inside_wrapped_string {
2643 invisibles.push(Invisible::Tab {
2644 line_start_offset: line.len(),
2645 });
2646 }
2647 } else {
2648 invisibles.extend(
2649 line_chunk
2650 .chars()
2651 .enumerate()
2652 .filter(|(_, line_char)| {
2653 let is_whitespace = line_char.is_whitespace();
2654 non_whitespace_added |= !is_whitespace;
2655 is_whitespace
2656 && (non_whitespace_added || !inside_wrapped_string)
2657 })
2658 .map(|(whitespace_index, _)| Invisible::Whitespace {
2659 line_offset: line.len() + whitespace_index,
2660 }),
2661 )
2662 }
2663 }
2664
2665 line.push_str(line_chunk);
2666 }
2667 }
2668 }
2669
2670 layouts
2671 }
2672
2673 fn draw(
2674 &self,
2675 layout: &LayoutState,
2676 row: u32,
2677 content_origin: gpui::Point<Pixels>,
2678 whitespace_setting: ShowWhitespaceSetting,
2679 selection_ranges: &[Range<DisplayPoint>],
2680 cx: &mut WindowContext,
2681 ) {
2682 let line_height = layout.position_map.line_height;
2683 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2684
2685 self.line.paint(
2686 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2687 line_height,
2688 cx,
2689 );
2690
2691 self.draw_invisibles(
2692 &selection_ranges,
2693 layout,
2694 content_origin,
2695 line_y,
2696 row,
2697 line_height,
2698 whitespace_setting,
2699 cx,
2700 );
2701 }
2702
2703 fn draw_invisibles(
2704 &self,
2705 selection_ranges: &[Range<DisplayPoint>],
2706 layout: &LayoutState,
2707 content_origin: gpui::Point<Pixels>,
2708 line_y: Pixels,
2709 row: u32,
2710 line_height: Pixels,
2711 whitespace_setting: ShowWhitespaceSetting,
2712 cx: &mut WindowContext,
2713 ) {
2714 let allowed_invisibles_regions = match whitespace_setting {
2715 ShowWhitespaceSetting::None => return,
2716 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2717 ShowWhitespaceSetting::All => None,
2718 };
2719
2720 for invisible in &self.invisibles {
2721 let (&token_offset, invisible_symbol) = match invisible {
2722 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2723 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2724 };
2725
2726 let x_offset = self.line.x_for_index(token_offset);
2727 let invisible_offset =
2728 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2729 let origin = content_origin
2730 + gpui::point(
2731 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2732 line_y,
2733 );
2734
2735 if let Some(allowed_regions) = allowed_invisibles_regions {
2736 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2737 if !allowed_regions
2738 .iter()
2739 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2740 {
2741 continue;
2742 }
2743 }
2744 invisible_symbol.paint(origin, line_height, cx);
2745 }
2746 }
2747}
2748
2749#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2750enum Invisible {
2751 Tab { line_start_offset: usize },
2752 Whitespace { line_offset: usize },
2753}
2754
2755impl Element for EditorElement {
2756 type State = ();
2757
2758 fn layout(
2759 &mut self,
2760 element_state: Option<Self::State>,
2761 cx: &mut gpui::WindowContext,
2762 ) -> (gpui::LayoutId, Self::State) {
2763 self.editor.update(cx, |editor, cx| {
2764 editor.set_style(self.style.clone(), cx);
2765
2766 let layout_id = match editor.mode {
2767 EditorMode::SingleLine => {
2768 let rem_size = cx.rem_size();
2769 let mut style = Style::default();
2770 style.size.width = relative(1.).into();
2771 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2772 cx.request_layout(&style, None)
2773 }
2774 EditorMode::AutoHeight { max_lines } => {
2775 let editor_handle = cx.view().clone();
2776 let max_line_number_width =
2777 self.max_line_number_width(&editor.snapshot(cx), cx);
2778 cx.request_measured_layout(
2779 Style::default(),
2780 move |known_dimensions, available_space, cx| {
2781 editor_handle
2782 .update(cx, |editor, cx| {
2783 compute_auto_height_layout(
2784 editor,
2785 max_lines,
2786 max_line_number_width,
2787 known_dimensions,
2788 cx,
2789 )
2790 })
2791 .unwrap_or_default()
2792 },
2793 )
2794 }
2795 EditorMode::Full => {
2796 let mut style = Style::default();
2797 style.size.width = relative(1.).into();
2798 style.size.height = relative(1.).into();
2799 cx.request_layout(&style, None)
2800 }
2801 };
2802
2803 (layout_id, ())
2804 })
2805 }
2806
2807 fn paint(
2808 mut self,
2809 bounds: Bounds<gpui::Pixels>,
2810 element_state: &mut Self::State,
2811 cx: &mut gpui::WindowContext,
2812 ) {
2813 let editor = self.editor.clone();
2814
2815 let mut layout = self.compute_layout(bounds, cx);
2816 let gutter_bounds = Bounds {
2817 origin: bounds.origin,
2818 size: layout.gutter_size,
2819 };
2820 let text_bounds = Bounds {
2821 origin: gutter_bounds.upper_right(),
2822 size: layout.text_size,
2823 };
2824
2825 let focus_handle = editor.focus_handle(cx);
2826 let key_context = self.editor.read(cx).key_context(cx);
2827 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2828 self.register_actions(cx);
2829 self.register_key_listeners(cx);
2830
2831 // We call with_z_index to establish a new stacking context.
2832 cx.with_z_index(0, |cx| {
2833 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2834 // Paint mouse listeners at z-index 0 so any elements we paint on top of the editor
2835 // take precedence.
2836 cx.with_z_index(0, |cx| {
2837 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2838 });
2839 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2840 cx.handle_input(&focus_handle, input_handler);
2841
2842 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2843 if layout.gutter_size.width > Pixels::ZERO {
2844 self.paint_gutter(gutter_bounds, &mut layout, cx);
2845 }
2846 self.paint_text(text_bounds, &mut layout, cx);
2847
2848 if !layout.blocks.is_empty() {
2849 cx.with_z_index(1, |cx| {
2850 cx.with_element_id(Some("editor_blocks"), |cx| {
2851 self.paint_blocks(bounds, &mut layout, cx);
2852 });
2853 })
2854 }
2855
2856 cx.with_z_index(2, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2857 });
2858 });
2859 })
2860 }
2861}
2862
2863impl IntoElement for EditorElement {
2864 type Element = Self;
2865
2866 fn element_id(&self) -> Option<gpui::ElementId> {
2867 self.editor.element_id()
2868 }
2869
2870 fn into_element(self) -> Self::Element {
2871 self
2872 }
2873}
2874
2875type BufferRow = u32;
2876
2877pub struct LayoutState {
2878 position_map: Arc<PositionMap>,
2879 gutter_size: Size<Pixels>,
2880 gutter_padding: Pixels,
2881 gutter_margin: Pixels,
2882 text_size: gpui::Size<Pixels>,
2883 mode: EditorMode,
2884 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2885 visible_anchor_range: Range<Anchor>,
2886 visible_display_row_range: Range<u32>,
2887 active_rows: BTreeMap<u32, bool>,
2888 highlighted_rows: Option<Range<u32>>,
2889 line_numbers: Vec<Option<ShapedLine>>,
2890 display_hunks: Vec<DisplayDiffHunk>,
2891 blocks: Vec<BlockLayout>,
2892 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2893 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2894 scrollbar_row_range: Range<f32>,
2895 show_scrollbars: bool,
2896 is_singleton: bool,
2897 max_row: u32,
2898 context_menu: Option<(DisplayPoint, AnyElement)>,
2899 code_actions_indicator: Option<CodeActionsIndicator>,
2900 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2901 fold_indicators: Vec<Option<IconButton>>,
2902 tab_invisible: ShapedLine,
2903 space_invisible: ShapedLine,
2904}
2905
2906struct CodeActionsIndicator {
2907 row: u32,
2908 button: IconButton,
2909}
2910
2911struct PositionMap {
2912 size: Size<Pixels>,
2913 line_height: Pixels,
2914 scroll_position: gpui::Point<Pixels>,
2915 scroll_max: gpui::Point<f32>,
2916 em_width: Pixels,
2917 em_advance: Pixels,
2918 line_layouts: Vec<LineWithInvisibles>,
2919 snapshot: EditorSnapshot,
2920}
2921
2922#[derive(Debug, Copy, Clone)]
2923pub struct PointForPosition {
2924 pub previous_valid: DisplayPoint,
2925 pub next_valid: DisplayPoint,
2926 pub exact_unclipped: DisplayPoint,
2927 pub column_overshoot_after_line_end: u32,
2928}
2929
2930impl PointForPosition {
2931 #[cfg(test)]
2932 pub fn valid(valid: DisplayPoint) -> Self {
2933 Self {
2934 previous_valid: valid,
2935 next_valid: valid,
2936 exact_unclipped: valid,
2937 column_overshoot_after_line_end: 0,
2938 }
2939 }
2940
2941 pub fn as_valid(&self) -> Option<DisplayPoint> {
2942 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2943 Some(self.previous_valid)
2944 } else {
2945 None
2946 }
2947 }
2948}
2949
2950impl PositionMap {
2951 fn point_for_position(
2952 &self,
2953 text_bounds: Bounds<Pixels>,
2954 position: gpui::Point<Pixels>,
2955 ) -> PointForPosition {
2956 let scroll_position = self.snapshot.scroll_position();
2957 let position = position - text_bounds.origin;
2958 let y = position.y.max(px(0.)).min(self.size.height);
2959 let x = position.x + (scroll_position.x * self.em_width);
2960 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2961
2962 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2963 .line_layouts
2964 .get(row as usize - scroll_position.y as usize)
2965 .map(|&LineWithInvisibles { ref line, .. }| line)
2966 {
2967 if let Some(ix) = line.index_for_x(x) {
2968 (ix as u32, px(0.))
2969 } else {
2970 (line.len as u32, px(0.).max(x - line.width))
2971 }
2972 } else {
2973 (0, x)
2974 };
2975
2976 let mut exact_unclipped = DisplayPoint::new(row, column);
2977 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2978 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2979
2980 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2981 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2982 PointForPosition {
2983 previous_valid,
2984 next_valid,
2985 exact_unclipped,
2986 column_overshoot_after_line_end,
2987 }
2988 }
2989}
2990
2991struct BlockLayout {
2992 row: u32,
2993 element: AnyElement,
2994 available_space: Size<AvailableSpace>,
2995 style: BlockStyle,
2996}
2997
2998fn layout_line(
2999 row: u32,
3000 snapshot: &EditorSnapshot,
3001 style: &EditorStyle,
3002 cx: &WindowContext,
3003) -> Result<ShapedLine> {
3004 let mut line = snapshot.line(row);
3005
3006 if line.len() > MAX_LINE_LEN {
3007 let mut len = MAX_LINE_LEN;
3008 while !line.is_char_boundary(len) {
3009 len -= 1;
3010 }
3011
3012 line.truncate(len);
3013 }
3014
3015 cx.text_system().shape_line(
3016 line.into(),
3017 style.text.font_size.to_pixels(cx.rem_size()),
3018 &[TextRun {
3019 len: snapshot.line_len(row) as usize,
3020 font: style.text.font(),
3021 color: Hsla::default(),
3022 background_color: None,
3023 underline: None,
3024 }],
3025 )
3026}
3027
3028#[derive(Debug)]
3029pub struct Cursor {
3030 origin: gpui::Point<Pixels>,
3031 block_width: Pixels,
3032 line_height: Pixels,
3033 color: Hsla,
3034 shape: CursorShape,
3035 block_text: Option<ShapedLine>,
3036}
3037
3038impl Cursor {
3039 pub fn new(
3040 origin: gpui::Point<Pixels>,
3041 block_width: Pixels,
3042 line_height: Pixels,
3043 color: Hsla,
3044 shape: CursorShape,
3045 block_text: Option<ShapedLine>,
3046 ) -> Cursor {
3047 Cursor {
3048 origin,
3049 block_width,
3050 line_height,
3051 color,
3052 shape,
3053 block_text,
3054 }
3055 }
3056
3057 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3058 Bounds {
3059 origin: self.origin + origin,
3060 size: size(self.block_width, self.line_height),
3061 }
3062 }
3063
3064 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3065 let bounds = match self.shape {
3066 CursorShape::Bar => Bounds {
3067 origin: self.origin + origin,
3068 size: size(px(2.0), self.line_height),
3069 },
3070 CursorShape::Block | CursorShape::Hollow => Bounds {
3071 origin: self.origin + origin,
3072 size: size(self.block_width, self.line_height),
3073 },
3074 CursorShape::Underscore => Bounds {
3075 origin: self.origin
3076 + origin
3077 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3078 size: size(self.block_width, px(2.0)),
3079 },
3080 };
3081
3082 //Draw background or border quad
3083 if matches!(self.shape, CursorShape::Hollow) {
3084 cx.paint_quad(
3085 bounds,
3086 Corners::default(),
3087 transparent_black(),
3088 Edges::all(px(1.)),
3089 self.color,
3090 );
3091 } else {
3092 cx.paint_quad(
3093 bounds,
3094 Corners::default(),
3095 self.color,
3096 Edges::default(),
3097 transparent_black(),
3098 );
3099 }
3100
3101 if let Some(block_text) = &self.block_text {
3102 block_text.paint(self.origin + origin, self.line_height, cx);
3103 }
3104 }
3105
3106 pub fn shape(&self) -> CursorShape {
3107 self.shape
3108 }
3109}
3110
3111#[derive(Debug)]
3112pub struct HighlightedRange {
3113 pub start_y: Pixels,
3114 pub line_height: Pixels,
3115 pub lines: Vec<HighlightedRangeLine>,
3116 pub color: Hsla,
3117 pub corner_radius: Pixels,
3118}
3119
3120#[derive(Debug)]
3121pub struct HighlightedRangeLine {
3122 pub start_x: Pixels,
3123 pub end_x: Pixels,
3124}
3125
3126impl HighlightedRange {
3127 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3128 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3129 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3130 self.paint_lines(
3131 self.start_y + self.line_height,
3132 &self.lines[1..],
3133 bounds,
3134 cx,
3135 );
3136 } else {
3137 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3138 }
3139 }
3140
3141 fn paint_lines(
3142 &self,
3143 start_y: Pixels,
3144 lines: &[HighlightedRangeLine],
3145 bounds: Bounds<Pixels>,
3146 cx: &mut WindowContext,
3147 ) {
3148 if lines.is_empty() {
3149 return;
3150 }
3151
3152 let first_line = lines.first().unwrap();
3153 let last_line = lines.last().unwrap();
3154
3155 let first_top_left = point(first_line.start_x, start_y);
3156 let first_top_right = point(first_line.end_x, start_y);
3157
3158 let curve_height = point(Pixels::ZERO, self.corner_radius);
3159 let curve_width = |start_x: Pixels, end_x: Pixels| {
3160 let max = (end_x - start_x) / 2.;
3161 let width = if max < self.corner_radius {
3162 max
3163 } else {
3164 self.corner_radius
3165 };
3166
3167 point(width, Pixels::ZERO)
3168 };
3169
3170 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3171 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3172 path.curve_to(first_top_right + curve_height, first_top_right);
3173
3174 let mut iter = lines.iter().enumerate().peekable();
3175 while let Some((ix, line)) = iter.next() {
3176 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3177
3178 if let Some((_, next_line)) = iter.peek() {
3179 let next_top_right = point(next_line.end_x, bottom_right.y);
3180
3181 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3182 Ordering::Equal => {
3183 path.line_to(bottom_right);
3184 }
3185 Ordering::Less => {
3186 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3187 path.line_to(bottom_right - curve_height);
3188 if self.corner_radius > Pixels::ZERO {
3189 path.curve_to(bottom_right - curve_width, bottom_right);
3190 }
3191 path.line_to(next_top_right + curve_width);
3192 if self.corner_radius > Pixels::ZERO {
3193 path.curve_to(next_top_right + curve_height, next_top_right);
3194 }
3195 }
3196 Ordering::Greater => {
3197 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3198 path.line_to(bottom_right - curve_height);
3199 if self.corner_radius > Pixels::ZERO {
3200 path.curve_to(bottom_right + curve_width, bottom_right);
3201 }
3202 path.line_to(next_top_right - curve_width);
3203 if self.corner_radius > Pixels::ZERO {
3204 path.curve_to(next_top_right + curve_height, next_top_right);
3205 }
3206 }
3207 }
3208 } else {
3209 let curve_width = curve_width(line.start_x, line.end_x);
3210 path.line_to(bottom_right - curve_height);
3211 if self.corner_radius > Pixels::ZERO {
3212 path.curve_to(bottom_right - curve_width, bottom_right);
3213 }
3214
3215 let bottom_left = point(line.start_x, bottom_right.y);
3216 path.line_to(bottom_left + curve_width);
3217 if self.corner_radius > Pixels::ZERO {
3218 path.curve_to(bottom_left - curve_height, bottom_left);
3219 }
3220 }
3221 }
3222
3223 if first_line.start_x > last_line.start_x {
3224 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3225 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3226 path.line_to(second_top_left + curve_height);
3227 if self.corner_radius > Pixels::ZERO {
3228 path.curve_to(second_top_left + curve_width, second_top_left);
3229 }
3230 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3231 path.line_to(first_bottom_left - curve_width);
3232 if self.corner_radius > Pixels::ZERO {
3233 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3234 }
3235 }
3236
3237 path.line_to(first_top_left + curve_height);
3238 if self.corner_radius > Pixels::ZERO {
3239 path.curve_to(first_top_left + top_curve_width, first_top_left);
3240 }
3241 path.line_to(first_top_right - top_curve_width);
3242
3243 cx.paint_path(path, self.color);
3244 }
3245}
3246
3247pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3248 (delta.pow(1.5) / 100.0).into()
3249}
3250
3251fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3252 (delta.pow(1.2) / 300.0).into()
3253}
3254
3255#[cfg(test)]
3256mod tests {
3257 use super::*;
3258 use crate::{
3259 display_map::{BlockDisposition, BlockProperties},
3260 editor_tests::{init_test, update_test_language_settings},
3261 Editor, MultiBuffer,
3262 };
3263 use gpui::{EmptyView, TestAppContext};
3264 use language::language_settings;
3265 use log::info;
3266 use std::{num::NonZeroU32, sync::Arc};
3267 use util::test::sample_text;
3268
3269 #[gpui::test]
3270 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3271 init_test(cx, |_| {});
3272 let window = cx.add_window(|cx| {
3273 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3274 Editor::new(EditorMode::Full, buffer, None, cx)
3275 });
3276
3277 let editor = window.root(cx).unwrap();
3278 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3279 let element = EditorElement::new(&editor, style);
3280
3281 let layouts = window
3282 .update(cx, |editor, cx| {
3283 let snapshot = editor.snapshot(cx);
3284 element
3285 .shape_line_numbers(
3286 0..6,
3287 &Default::default(),
3288 DisplayPoint::new(0, 0),
3289 false,
3290 &snapshot,
3291 cx,
3292 )
3293 .0
3294 })
3295 .unwrap();
3296 assert_eq!(layouts.len(), 6);
3297
3298 let relative_rows = window
3299 .update(cx, |editor, cx| {
3300 let snapshot = editor.snapshot(cx);
3301 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3302 })
3303 .unwrap();
3304 assert_eq!(relative_rows[&0], 3);
3305 assert_eq!(relative_rows[&1], 2);
3306 assert_eq!(relative_rows[&2], 1);
3307 // current line has no relative number
3308 assert_eq!(relative_rows[&4], 1);
3309 assert_eq!(relative_rows[&5], 2);
3310
3311 // works if cursor is before screen
3312 let relative_rows = window
3313 .update(cx, |editor, cx| {
3314 let snapshot = editor.snapshot(cx);
3315
3316 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3317 })
3318 .unwrap();
3319 assert_eq!(relative_rows.len(), 3);
3320 assert_eq!(relative_rows[&3], 2);
3321 assert_eq!(relative_rows[&4], 3);
3322 assert_eq!(relative_rows[&5], 4);
3323
3324 // works if cursor is after screen
3325 let relative_rows = window
3326 .update(cx, |editor, cx| {
3327 let snapshot = editor.snapshot(cx);
3328
3329 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3330 })
3331 .unwrap();
3332 assert_eq!(relative_rows.len(), 3);
3333 assert_eq!(relative_rows[&0], 5);
3334 assert_eq!(relative_rows[&1], 4);
3335 assert_eq!(relative_rows[&2], 3);
3336 }
3337
3338 #[gpui::test]
3339 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3340 init_test(cx, |_| {});
3341
3342 let window = cx.add_window(|cx| {
3343 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3344 Editor::new(EditorMode::Full, buffer, None, cx)
3345 });
3346 let editor = window.root(cx).unwrap();
3347 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3348 let mut element = EditorElement::new(&editor, style);
3349
3350 window
3351 .update(cx, |editor, cx| {
3352 editor.cursor_shape = CursorShape::Block;
3353 editor.change_selections(None, cx, |s| {
3354 s.select_ranges([
3355 Point::new(0, 0)..Point::new(1, 0),
3356 Point::new(3, 2)..Point::new(3, 3),
3357 Point::new(5, 6)..Point::new(6, 0),
3358 ]);
3359 });
3360 })
3361 .unwrap();
3362 let state = cx
3363 .update_window(window.into(), |_, cx| {
3364 element.compute_layout(
3365 Bounds {
3366 origin: point(px(500.), px(500.)),
3367 size: size(px(500.), px(500.)),
3368 },
3369 cx,
3370 )
3371 })
3372 .unwrap();
3373
3374 assert_eq!(state.selections.len(), 1);
3375 let local_selections = &state.selections[0].1;
3376 assert_eq!(local_selections.len(), 3);
3377 // moves cursor back one line
3378 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3379 assert_eq!(
3380 local_selections[0].range,
3381 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3382 );
3383
3384 // moves cursor back one column
3385 assert_eq!(
3386 local_selections[1].range,
3387 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3388 );
3389 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3390
3391 // leaves cursor on the max point
3392 assert_eq!(
3393 local_selections[2].range,
3394 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3395 );
3396 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3397
3398 // active lines does not include 1 (even though the range of the selection does)
3399 assert_eq!(
3400 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3401 vec![0, 3, 5, 6]
3402 );
3403
3404 // multi-buffer support
3405 // in DisplayPoint co-ordinates, this is what we're dealing with:
3406 // 0: [[file
3407 // 1: header]]
3408 // 2: aaaaaa
3409 // 3: bbbbbb
3410 // 4: cccccc
3411 // 5:
3412 // 6: ...
3413 // 7: ffffff
3414 // 8: gggggg
3415 // 9: hhhhhh
3416 // 10:
3417 // 11: [[file
3418 // 12: header]]
3419 // 13: bbbbbb
3420 // 14: cccccc
3421 // 15: dddddd
3422 let window = cx.add_window(|cx| {
3423 let buffer = MultiBuffer::build_multi(
3424 [
3425 (
3426 &(sample_text(8, 6, 'a') + "\n"),
3427 vec![
3428 Point::new(0, 0)..Point::new(3, 0),
3429 Point::new(4, 0)..Point::new(7, 0),
3430 ],
3431 ),
3432 (
3433 &(sample_text(8, 6, 'a') + "\n"),
3434 vec![Point::new(1, 0)..Point::new(3, 0)],
3435 ),
3436 ],
3437 cx,
3438 );
3439 Editor::new(EditorMode::Full, buffer, None, cx)
3440 });
3441 let editor = window.root(cx).unwrap();
3442 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3443 let mut element = EditorElement::new(&editor, style);
3444 let state = window.update(cx, |editor, cx| {
3445 editor.cursor_shape = CursorShape::Block;
3446 editor.change_selections(None, cx, |s| {
3447 s.select_display_ranges([
3448 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3449 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3450 ]);
3451 });
3452 });
3453
3454 let state = cx
3455 .update_window(window.into(), |_, cx| {
3456 element.compute_layout(
3457 Bounds {
3458 origin: point(px(500.), px(500.)),
3459 size: size(px(500.), px(500.)),
3460 },
3461 cx,
3462 )
3463 })
3464 .unwrap();
3465 assert_eq!(state.selections.len(), 1);
3466 let local_selections = &state.selections[0].1;
3467 assert_eq!(local_selections.len(), 2);
3468
3469 // moves cursor on excerpt boundary back a line
3470 // and doesn't allow selection to bleed through
3471 assert_eq!(
3472 local_selections[0].range,
3473 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3474 );
3475 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3476 // moves cursor on buffer boundary back two lines
3477 // and doesn't allow selection to bleed through
3478 assert_eq!(
3479 local_selections[1].range,
3480 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3481 );
3482 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3483 }
3484
3485 #[gpui::test]
3486 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3487 init_test(cx, |_| {});
3488
3489 let window = cx.add_window(|cx| {
3490 let buffer = MultiBuffer::build_simple("", cx);
3491 Editor::new(EditorMode::Full, buffer, None, cx)
3492 });
3493 let editor = window.root(cx).unwrap();
3494 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3495 window
3496 .update(cx, |editor, cx| {
3497 editor.set_placeholder_text("hello", cx);
3498 editor.insert_blocks(
3499 [BlockProperties {
3500 style: BlockStyle::Fixed,
3501 disposition: BlockDisposition::Above,
3502 height: 3,
3503 position: Anchor::min(),
3504 render: Arc::new(|_| div().into_any()),
3505 }],
3506 None,
3507 cx,
3508 );
3509
3510 // Blur the editor so that it displays placeholder text.
3511 cx.blur();
3512 })
3513 .unwrap();
3514
3515 let mut element = EditorElement::new(&editor, style);
3516 let mut state = cx
3517 .update_window(window.into(), |_, cx| {
3518 element.compute_layout(
3519 Bounds {
3520 origin: point(px(500.), px(500.)),
3521 size: size(px(500.), px(500.)),
3522 },
3523 cx,
3524 )
3525 })
3526 .unwrap();
3527 let size = state.position_map.size;
3528
3529 assert_eq!(state.position_map.line_layouts.len(), 4);
3530 assert_eq!(
3531 state
3532 .line_numbers
3533 .iter()
3534 .map(Option::is_some)
3535 .collect::<Vec<_>>(),
3536 &[false, false, false, true]
3537 );
3538
3539 // Don't panic.
3540 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3541 cx.update_window(window.into(), |_, cx| {
3542 element.paint(bounds, &mut (), cx);
3543 })
3544 .unwrap()
3545 }
3546
3547 #[gpui::test]
3548 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3549 const TAB_SIZE: u32 = 4;
3550
3551 let input_text = "\t \t|\t| a b";
3552 let expected_invisibles = vec![
3553 Invisible::Tab {
3554 line_start_offset: 0,
3555 },
3556 Invisible::Whitespace {
3557 line_offset: TAB_SIZE as usize,
3558 },
3559 Invisible::Tab {
3560 line_start_offset: TAB_SIZE as usize + 1,
3561 },
3562 Invisible::Tab {
3563 line_start_offset: TAB_SIZE as usize * 2 + 1,
3564 },
3565 Invisible::Whitespace {
3566 line_offset: TAB_SIZE as usize * 3 + 1,
3567 },
3568 Invisible::Whitespace {
3569 line_offset: TAB_SIZE as usize * 3 + 3,
3570 },
3571 ];
3572 assert_eq!(
3573 expected_invisibles.len(),
3574 input_text
3575 .chars()
3576 .filter(|initial_char| initial_char.is_whitespace())
3577 .count(),
3578 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3579 );
3580
3581 init_test(cx, |s| {
3582 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3583 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3584 });
3585
3586 let actual_invisibles =
3587 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3588
3589 assert_eq!(expected_invisibles, actual_invisibles);
3590 }
3591
3592 #[gpui::test]
3593 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3594 init_test(cx, |s| {
3595 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3596 s.defaults.tab_size = NonZeroU32::new(4);
3597 });
3598
3599 for editor_mode_without_invisibles in [
3600 EditorMode::SingleLine,
3601 EditorMode::AutoHeight { max_lines: 100 },
3602 ] {
3603 let invisibles = collect_invisibles_from_new_editor(
3604 cx,
3605 editor_mode_without_invisibles,
3606 "\t\t\t| | a b",
3607 px(500.0),
3608 );
3609 assert!(invisibles.is_empty(),
3610 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3611 }
3612 }
3613
3614 #[gpui::test]
3615 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3616 let tab_size = 4;
3617 let input_text = "a\tbcd ".repeat(9);
3618 let repeated_invisibles = [
3619 Invisible::Tab {
3620 line_start_offset: 1,
3621 },
3622 Invisible::Whitespace {
3623 line_offset: tab_size as usize + 3,
3624 },
3625 Invisible::Whitespace {
3626 line_offset: tab_size as usize + 4,
3627 },
3628 Invisible::Whitespace {
3629 line_offset: tab_size as usize + 5,
3630 },
3631 ];
3632 let expected_invisibles = std::iter::once(repeated_invisibles)
3633 .cycle()
3634 .take(9)
3635 .flatten()
3636 .collect::<Vec<_>>();
3637 assert_eq!(
3638 expected_invisibles.len(),
3639 input_text
3640 .chars()
3641 .filter(|initial_char| initial_char.is_whitespace())
3642 .count(),
3643 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3644 );
3645 info!("Expected invisibles: {expected_invisibles:?}");
3646
3647 init_test(cx, |_| {});
3648
3649 // Put the same string with repeating whitespace pattern into editors of various size,
3650 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3651 let resize_step = 10.0;
3652 let mut editor_width = 200.0;
3653 while editor_width <= 1000.0 {
3654 update_test_language_settings(cx, |s| {
3655 s.defaults.tab_size = NonZeroU32::new(tab_size);
3656 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3657 s.defaults.preferred_line_length = Some(editor_width as u32);
3658 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3659 });
3660
3661 let actual_invisibles = collect_invisibles_from_new_editor(
3662 cx,
3663 EditorMode::Full,
3664 &input_text,
3665 px(editor_width),
3666 );
3667
3668 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3669 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3670 let mut i = 0;
3671 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3672 i = actual_index;
3673 match expected_invisibles.get(i) {
3674 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3675 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3676 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3677 _ => {
3678 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3679 }
3680 },
3681 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3682 }
3683 }
3684 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3685 assert!(
3686 missing_expected_invisibles.is_empty(),
3687 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3688 );
3689
3690 editor_width += resize_step;
3691 }
3692 }
3693
3694 fn collect_invisibles_from_new_editor(
3695 cx: &mut TestAppContext,
3696 editor_mode: EditorMode,
3697 input_text: &str,
3698 editor_width: Pixels,
3699 ) -> Vec<Invisible> {
3700 info!(
3701 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3702 editor_width.0
3703 );
3704 let window = cx.add_window(|cx| {
3705 let buffer = MultiBuffer::build_simple(&input_text, cx);
3706 Editor::new(editor_mode, buffer, None, cx)
3707 });
3708 let editor = window.root(cx).unwrap();
3709 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3710 let mut element = EditorElement::new(&editor, style);
3711 window
3712 .update(cx, |editor, cx| {
3713 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3714 editor.set_wrap_width(Some(editor_width), cx);
3715 })
3716 .unwrap();
3717 let layout_state = cx
3718 .update_window(window.into(), |_, cx| {
3719 element.compute_layout(
3720 Bounds {
3721 origin: point(px(500.), px(500.)),
3722 size: size(px(500.), px(500.)),
3723 },
3724 cx,
3725 )
3726 })
3727 .unwrap();
3728
3729 layout_state
3730 .position_map
3731 .line_layouts
3732 .iter()
3733 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3734 .flatten()
3735 .cloned()
3736 .collect()
3737 }
3738}
3739
3740pub fn register_action<T: Action>(
3741 view: &View<Editor>,
3742 cx: &mut WindowContext,
3743 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3744) {
3745 let view = view.clone();
3746 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3747 let action = action.downcast_ref().unwrap();
3748 if phase == DispatchPhase::Bubble {
3749 view.update(cx, |editor, cx| {
3750 listener(editor, action, cx);
3751 })
3752 }
3753 })
3754}
3755
3756fn compute_auto_height_layout(
3757 editor: &mut Editor,
3758 max_lines: usize,
3759 max_line_number_width: Pixels,
3760 known_dimensions: Size<Option<Pixels>>,
3761 cx: &mut ViewContext<Editor>,
3762) -> Option<Size<Pixels>> {
3763 let mut width = known_dimensions.width?;
3764 if let Some(height) = known_dimensions.height {
3765 return Some(size(width, height));
3766 }
3767
3768 let style = editor.style.as_ref().unwrap();
3769 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3770 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3771 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3772 let em_width = cx
3773 .text_system()
3774 .typographic_bounds(font_id, font_size, 'm')
3775 .unwrap()
3776 .size
3777 .width;
3778
3779 let mut snapshot = editor.snapshot(cx);
3780 let gutter_padding;
3781 let gutter_width;
3782 let gutter_margin;
3783 if snapshot.show_gutter {
3784 let descent = cx.text_system().descent(font_id, font_size);
3785 let gutter_padding_factor = 3.5;
3786 gutter_padding = (em_width * gutter_padding_factor).round();
3787 gutter_width = max_line_number_width + gutter_padding * 2.0;
3788 gutter_margin = -descent;
3789 } else {
3790 gutter_padding = Pixels::ZERO;
3791 gutter_width = Pixels::ZERO;
3792 gutter_margin = Pixels::ZERO;
3793 };
3794
3795 editor.gutter_width = gutter_width;
3796 let text_width = width - gutter_width;
3797 let overscroll = size(em_width, px(0.));
3798
3799 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3800 if editor.set_wrap_width(Some(editor_width), cx) {
3801 snapshot = editor.snapshot(cx);
3802 }
3803
3804 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3805 let height = scroll_height
3806 .max(line_height)
3807 .min(line_height * max_lines as f32);
3808
3809 Some(size(width, height))
3810}