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