1use crate::{
2 display_map::{
3 BlockContext, BlockStyle, DisplaySnapshot, FoldStatus, HighlightedChunk, ToDisplayPoint,
4 TransformBlock,
5 },
6 editor_settings::ShowScrollbar,
7 git::{diff_hunk_to_display, DisplayDiffHunk},
8 hover_popover::{
9 self, hover_at, HOVER_POPOVER_GAP, MIN_POPOVER_CHARACTER_WIDTH, MIN_POPOVER_LINE_HEIGHT,
10 },
11 link_go_to_definition::{
12 go_to_fetched_definition, go_to_fetched_type_definition, show_link_definition,
13 update_go_to_definition_link, update_inlay_link_and_hover_points, GoToDefinitionTrigger,
14 LinkGoToDefinitionState,
15 },
16 mouse_context_menu,
17 scroll::scroll_amount::ScrollAmount,
18 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
19 HalfPageDown, HalfPageUp, LineDown, LineUp, MoveDown, OpenExcerpts, PageDown, PageUp, Point,
20 SelectPhase, Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
21};
22use anyhow::Result;
23use collections::{BTreeMap, HashMap};
24use git::diff::DiffHunkStatus;
25use gpui::{
26 div, fill, outline, overlay, point, px, quad, relative, size, transparent_black, Action,
27 AnchorCorner, AnyElement, AsyncWindowContext, AvailableSpace, BorrowWindow, Bounds,
28 ContentMask, Corners, CursorStyle, DispatchPhase, Edges, Element, ElementId,
29 ElementInputHandler, Entity, EntityId, Hsla, InteractiveBounds, InteractiveElement,
30 IntoElement, LineLayout, ModifiersChangedEvent, MouseButton, MouseDownEvent, MouseMoveEvent,
31 MouseUpEvent, ParentElement, Pixels, RenderOnce, ScrollWheelEvent, ShapedLine, SharedString,
32 Size, StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun, TextStyle, View,
33 ViewContext, WeakView, WindowContext, WrappedLine,
34};
35use itertools::Itertools;
36use language::{language_settings::ShowWhitespaceSetting, Language};
37use multi_buffer::Anchor;
38use project::{
39 project_settings::{GitGutterSetting, ProjectSettings},
40 ProjectPath,
41};
42use settings::Settings;
43use smallvec::SmallVec;
44use std::{
45 any::TypeId,
46 borrow::Cow,
47 cmp::{self, Ordering},
48 fmt::Write,
49 iter,
50 ops::Range,
51 sync::Arc,
52};
53use sum_tree::Bias;
54use theme::{ActiveTheme, PlayerColor};
55use ui::{
56 h_stack, ButtonLike, ButtonStyle, Disclosure, IconButton, IconElement, IconSize, Label, Tooltip,
57};
58use ui::{prelude::*, Icon};
59use util::ResultExt;
60use workspace::item::Item;
61
62enum FoldMarkers {}
63
64struct SelectionLayout {
65 head: DisplayPoint,
66 cursor_shape: CursorShape,
67 is_newest: bool,
68 is_local: bool,
69 range: Range<DisplayPoint>,
70 active_rows: Range<u32>,
71}
72
73impl SelectionLayout {
74 fn new<T: ToPoint + ToDisplayPoint + Clone>(
75 selection: Selection<T>,
76 line_mode: bool,
77 cursor_shape: CursorShape,
78 map: &DisplaySnapshot,
79 is_newest: bool,
80 is_local: bool,
81 ) -> Self {
82 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
83 let display_selection = point_selection.map(|p| p.to_display_point(map));
84 let mut range = display_selection.range();
85 let mut head = display_selection.head();
86 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
87 ..map.next_line_boundary(point_selection.end).1.row();
88
89 // vim visual line mode
90 if line_mode {
91 let point_range = map.expand_to_line(point_selection.range());
92 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
93 }
94
95 // any vim visual mode (including line mode)
96 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
97 if head.column() > 0 {
98 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
99 } else if head.row() > 0 && head != map.max_point() {
100 head = map.clip_point(
101 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
102 Bias::Left,
103 );
104 // updating range.end is a no-op unless you're cursor is
105 // on the newline containing a multi-buffer divider
106 // in which case the clip_point may have moved the head up
107 // an additional row.
108 range.end = DisplayPoint::new(head.row() + 1, 0);
109 active_rows.end = head.row();
110 }
111 }
112
113 Self {
114 head,
115 cursor_shape,
116 is_newest,
117 is_local,
118 range,
119 active_rows,
120 }
121 }
122}
123
124pub struct EditorElement {
125 editor: View<Editor>,
126 style: EditorStyle,
127}
128
129impl EditorElement {
130 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
131 Self {
132 editor: editor.clone(),
133 style,
134 }
135 }
136
137 fn register_actions(&self, cx: &mut WindowContext) {
138 let view = &self.editor;
139 view.update(cx, |editor, cx| {
140 for action in editor.editor_actions.iter() {
141 (action)(cx)
142 }
143 });
144
145 crate::rust_analyzer_ext::apply_related_actions(view, cx);
146 register_action(view, cx, Editor::move_left);
147 register_action(view, cx, Editor::move_right);
148 register_action(view, cx, Editor::move_down);
149 register_action(view, cx, Editor::move_up);
150 register_action(view, cx, Editor::cancel);
151 register_action(view, cx, Editor::newline);
152 register_action(view, cx, Editor::newline_above);
153 register_action(view, cx, Editor::newline_below);
154 register_action(view, cx, Editor::backspace);
155 register_action(view, cx, Editor::delete);
156 register_action(view, cx, Editor::tab);
157 register_action(view, cx, Editor::tab_prev);
158 register_action(view, cx, Editor::indent);
159 register_action(view, cx, Editor::outdent);
160 register_action(view, cx, Editor::delete_line);
161 register_action(view, cx, Editor::join_lines);
162 register_action(view, cx, Editor::sort_lines_case_sensitive);
163 register_action(view, cx, Editor::sort_lines_case_insensitive);
164 register_action(view, cx, Editor::reverse_lines);
165 register_action(view, cx, Editor::shuffle_lines);
166 register_action(view, cx, Editor::convert_to_upper_case);
167 register_action(view, cx, Editor::convert_to_lower_case);
168 register_action(view, cx, Editor::convert_to_title_case);
169 register_action(view, cx, Editor::convert_to_snake_case);
170 register_action(view, cx, Editor::convert_to_kebab_case);
171 register_action(view, cx, Editor::convert_to_upper_camel_case);
172 register_action(view, cx, Editor::convert_to_lower_camel_case);
173 register_action(view, cx, Editor::delete_to_previous_word_start);
174 register_action(view, cx, Editor::delete_to_previous_subword_start);
175 register_action(view, cx, Editor::delete_to_next_word_end);
176 register_action(view, cx, Editor::delete_to_next_subword_end);
177 register_action(view, cx, Editor::delete_to_beginning_of_line);
178 register_action(view, cx, Editor::delete_to_end_of_line);
179 register_action(view, cx, Editor::cut_to_end_of_line);
180 register_action(view, cx, Editor::duplicate_line);
181 register_action(view, cx, Editor::move_line_up);
182 register_action(view, cx, Editor::move_line_down);
183 register_action(view, cx, Editor::transpose);
184 register_action(view, cx, Editor::cut);
185 register_action(view, cx, Editor::copy);
186 register_action(view, cx, Editor::paste);
187 register_action(view, cx, Editor::undo);
188 register_action(view, cx, Editor::redo);
189 register_action(view, cx, Editor::move_page_up);
190 register_action(view, cx, Editor::move_page_down);
191 register_action(view, cx, Editor::next_screen);
192 register_action(view, cx, Editor::scroll_cursor_top);
193 register_action(view, cx, Editor::scroll_cursor_center);
194 register_action(view, cx, Editor::scroll_cursor_bottom);
195 register_action(view, cx, |editor, _: &LineDown, cx| {
196 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
197 });
198 register_action(view, cx, |editor, _: &LineUp, cx| {
199 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
200 });
201 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
202 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
203 });
204 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
205 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
206 });
207 register_action(view, cx, |editor, _: &PageDown, cx| {
208 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
209 });
210 register_action(view, cx, |editor, _: &PageUp, cx| {
211 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
212 });
213 register_action(view, cx, Editor::move_to_previous_word_start);
214 register_action(view, cx, Editor::move_to_previous_subword_start);
215 register_action(view, cx, Editor::move_to_next_word_end);
216 register_action(view, cx, Editor::move_to_next_subword_end);
217 register_action(view, cx, Editor::move_to_beginning_of_line);
218 register_action(view, cx, Editor::move_to_end_of_line);
219 register_action(view, cx, Editor::move_to_start_of_paragraph);
220 register_action(view, cx, Editor::move_to_end_of_paragraph);
221 register_action(view, cx, Editor::move_to_beginning);
222 register_action(view, cx, Editor::move_to_end);
223 register_action(view, cx, Editor::select_up);
224 register_action(view, cx, Editor::select_down);
225 register_action(view, cx, Editor::select_left);
226 register_action(view, cx, Editor::select_right);
227 register_action(view, cx, Editor::select_to_previous_word_start);
228 register_action(view, cx, Editor::select_to_previous_subword_start);
229 register_action(view, cx, Editor::select_to_next_word_end);
230 register_action(view, cx, Editor::select_to_next_subword_end);
231 register_action(view, cx, Editor::select_to_beginning_of_line);
232 register_action(view, cx, Editor::select_to_end_of_line);
233 register_action(view, cx, Editor::select_to_start_of_paragraph);
234 register_action(view, cx, Editor::select_to_end_of_paragraph);
235 register_action(view, cx, Editor::select_to_beginning);
236 register_action(view, cx, Editor::select_to_end);
237 register_action(view, cx, Editor::select_all);
238 register_action(view, cx, |editor, action, cx| {
239 editor.select_all_matches(action, cx).log_err();
240 });
241 register_action(view, cx, Editor::select_line);
242 register_action(view, cx, Editor::split_selection_into_lines);
243 register_action(view, cx, Editor::add_selection_above);
244 register_action(view, cx, Editor::add_selection_below);
245 register_action(view, cx, |editor, action, cx| {
246 editor.select_next(action, cx).log_err();
247 });
248 register_action(view, cx, |editor, action, cx| {
249 editor.select_previous(action, cx).log_err();
250 });
251 register_action(view, cx, Editor::toggle_comments);
252 register_action(view, cx, Editor::select_larger_syntax_node);
253 register_action(view, cx, Editor::select_smaller_syntax_node);
254 register_action(view, cx, Editor::move_to_enclosing_bracket);
255 register_action(view, cx, Editor::undo_selection);
256 register_action(view, cx, Editor::redo_selection);
257 register_action(view, cx, Editor::go_to_diagnostic);
258 register_action(view, cx, Editor::go_to_prev_diagnostic);
259 register_action(view, cx, Editor::go_to_hunk);
260 register_action(view, cx, Editor::go_to_prev_hunk);
261 register_action(view, cx, Editor::go_to_definition);
262 register_action(view, cx, Editor::go_to_definition_split);
263 register_action(view, cx, Editor::go_to_type_definition);
264 register_action(view, cx, Editor::go_to_type_definition_split);
265 register_action(view, cx, Editor::fold);
266 register_action(view, cx, Editor::fold_at);
267 register_action(view, cx, Editor::unfold_lines);
268 register_action(view, cx, Editor::unfold_at);
269 register_action(view, cx, Editor::fold_selected_ranges);
270 register_action(view, cx, Editor::show_completions);
271 register_action(view, cx, Editor::toggle_code_actions);
272 register_action(view, cx, Editor::open_excerpts);
273 register_action(view, cx, Editor::toggle_soft_wrap);
274 register_action(view, cx, Editor::toggle_inlay_hints);
275 register_action(view, cx, hover_popover::hover);
276 register_action(view, cx, Editor::reveal_in_finder);
277 register_action(view, cx, Editor::copy_path);
278 register_action(view, cx, Editor::copy_relative_path);
279 register_action(view, cx, Editor::copy_highlight_json);
280 register_action(view, cx, |editor, action, cx| {
281 if let Some(task) = editor.format(action, cx) {
282 task.detach_and_log_err(cx);
283 } else {
284 cx.propagate();
285 }
286 });
287 register_action(view, cx, Editor::restart_language_server);
288 register_action(view, cx, Editor::show_character_palette);
289 register_action(view, cx, |editor, action, cx| {
290 if let Some(task) = editor.confirm_completion(action, cx) {
291 task.detach_and_log_err(cx);
292 } else {
293 cx.propagate();
294 }
295 });
296 register_action(view, cx, |editor, action, cx| {
297 if let Some(task) = editor.confirm_code_action(action, cx) {
298 task.detach_and_log_err(cx);
299 } else {
300 cx.propagate();
301 }
302 });
303 register_action(view, cx, |editor, action, cx| {
304 if let Some(task) = editor.rename(action, cx) {
305 task.detach_and_log_err(cx);
306 } else {
307 cx.propagate();
308 }
309 });
310 register_action(view, cx, |editor, action, cx| {
311 if let Some(task) = editor.confirm_rename(action, cx) {
312 task.detach_and_log_err(cx);
313 } else {
314 cx.propagate();
315 }
316 });
317 register_action(view, cx, |editor, action, cx| {
318 if let Some(task) = editor.find_all_references(action, cx) {
319 task.detach_and_log_err(cx);
320 } else {
321 cx.propagate();
322 }
323 });
324 register_action(view, cx, Editor::next_copilot_suggestion);
325 register_action(view, cx, Editor::previous_copilot_suggestion);
326 register_action(view, cx, Editor::copilot_suggest);
327 register_action(view, cx, Editor::context_menu_first);
328 register_action(view, cx, Editor::context_menu_prev);
329 register_action(view, cx, Editor::context_menu_next);
330 register_action(view, cx, Editor::context_menu_last);
331 }
332
333 fn register_key_listeners(&self, cx: &mut WindowContext) {
334 cx.on_key_event({
335 let editor = self.editor.clone();
336 move |event: &ModifiersChangedEvent, phase, cx| {
337 if phase != DispatchPhase::Bubble {
338 return;
339 }
340
341 if editor.update(cx, |editor, cx| Self::modifiers_changed(editor, event, cx)) {
342 cx.stop_propagation();
343 }
344 }
345 });
346 }
347
348 pub(crate) fn modifiers_changed(
349 editor: &mut Editor,
350 event: &ModifiersChangedEvent,
351 cx: &mut ViewContext<Editor>,
352 ) -> bool {
353 let pending_selection = editor.has_pending_selection();
354
355 if let Some(point) = &editor.link_go_to_definition_state.last_trigger_point {
356 if event.command && !pending_selection {
357 let point = point.clone();
358 let snapshot = editor.snapshot(cx);
359 let kind = point.definition_kind(event.shift);
360
361 show_link_definition(kind, editor, point, snapshot, cx);
362 return false;
363 }
364 }
365
366 {
367 if editor.link_go_to_definition_state.symbol_range.is_some()
368 || !editor.link_go_to_definition_state.definitions.is_empty()
369 {
370 editor.link_go_to_definition_state.symbol_range.take();
371 editor.link_go_to_definition_state.definitions.clear();
372 cx.notify();
373 }
374
375 editor.link_go_to_definition_state.task = None;
376
377 editor.clear_highlights::<LinkGoToDefinitionState>(cx);
378 }
379
380 false
381 }
382
383 fn mouse_left_down(
384 editor: &mut Editor,
385 event: &MouseDownEvent,
386 position_map: &PositionMap,
387 text_bounds: Bounds<Pixels>,
388 gutter_bounds: Bounds<Pixels>,
389 stacking_order: &StackingOrder,
390 cx: &mut ViewContext<Editor>,
391 ) {
392 let mut click_count = event.click_count;
393 let modifiers = event.modifiers;
394
395 if gutter_bounds.contains(&event.position) {
396 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
397 } else if !text_bounds.contains(&event.position) {
398 return;
399 }
400 if !cx.was_top_layer(&event.position, stacking_order) {
401 return;
402 }
403
404 let point_for_position = position_map.point_for_position(text_bounds, event.position);
405 let position = point_for_position.previous_valid;
406 if modifiers.shift && modifiers.alt {
407 editor.select(
408 SelectPhase::BeginColumnar {
409 position,
410 goal_column: point_for_position.exact_unclipped.column(),
411 },
412 cx,
413 );
414 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
415 editor.select(
416 SelectPhase::Extend {
417 position,
418 click_count,
419 },
420 cx,
421 );
422 } else {
423 editor.select(
424 SelectPhase::Begin {
425 position,
426 add: modifiers.alt,
427 click_count,
428 },
429 cx,
430 );
431 }
432
433 cx.stop_propagation();
434 }
435
436 fn mouse_right_down(
437 editor: &mut Editor,
438 event: &MouseDownEvent,
439 position_map: &PositionMap,
440 text_bounds: Bounds<Pixels>,
441 cx: &mut ViewContext<Editor>,
442 ) {
443 if !text_bounds.contains(&event.position) {
444 return;
445 }
446 let point_for_position = position_map.point_for_position(text_bounds, event.position);
447 mouse_context_menu::deploy_context_menu(
448 editor,
449 event.position,
450 point_for_position.previous_valid,
451 cx,
452 );
453 cx.stop_propagation();
454 }
455
456 fn mouse_up(
457 editor: &mut Editor,
458 event: &MouseUpEvent,
459 position_map: &PositionMap,
460 text_bounds: Bounds<Pixels>,
461 stacking_order: &StackingOrder,
462 cx: &mut ViewContext<Editor>,
463 ) {
464 let end_selection = editor.has_pending_selection();
465 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
466
467 if end_selection {
468 editor.select(SelectPhase::End, cx);
469 }
470
471 if !pending_nonempty_selections
472 && event.modifiers.command
473 && text_bounds.contains(&event.position)
474 && cx.was_top_layer(&event.position, stacking_order)
475 {
476 let point = position_map.point_for_position(text_bounds, event.position);
477 let could_be_inlay = point.as_valid().is_none();
478 let split = event.modifiers.alt;
479 if event.modifiers.shift || could_be_inlay {
480 go_to_fetched_type_definition(editor, point, split, cx);
481 } else {
482 go_to_fetched_definition(editor, point, split, cx);
483 }
484
485 cx.stop_propagation();
486 } else if end_selection {
487 cx.stop_propagation();
488 }
489 }
490
491 fn mouse_dragged(
492 editor: &mut Editor,
493 event: &MouseMoveEvent,
494 position_map: &PositionMap,
495 text_bounds: Bounds<Pixels>,
496 _gutter_bounds: Bounds<Pixels>,
497 _stacking_order: &StackingOrder,
498 cx: &mut ViewContext<Editor>,
499 ) {
500 if !editor.has_pending_selection() {
501 return;
502 }
503
504 let point_for_position = position_map.point_for_position(text_bounds, event.position);
505 let mut scroll_delta = gpui::Point::<f32>::default();
506 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
507 let top = text_bounds.origin.y + vertical_margin;
508 let bottom = text_bounds.lower_left().y - vertical_margin;
509 if event.position.y < top {
510 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
511 }
512 if event.position.y > bottom {
513 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
514 }
515
516 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
517 let left = text_bounds.origin.x + horizontal_margin;
518 let right = text_bounds.upper_right().x - horizontal_margin;
519 if event.position.x < left {
520 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
521 }
522 if event.position.x > right {
523 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
524 }
525
526 editor.select(
527 SelectPhase::Update {
528 position: point_for_position.previous_valid,
529 goal_column: point_for_position.exact_unclipped.column(),
530 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
531 .clamp(&gpui::Point::default(), &position_map.scroll_max),
532 },
533 cx,
534 );
535 }
536
537 fn mouse_moved(
538 editor: &mut Editor,
539 event: &MouseMoveEvent,
540 position_map: &PositionMap,
541 text_bounds: Bounds<Pixels>,
542 gutter_bounds: Bounds<Pixels>,
543 stacking_order: &StackingOrder,
544 cx: &mut ViewContext<Editor>,
545 ) {
546 let modifiers = event.modifiers;
547 let text_hovered = text_bounds.contains(&event.position);
548 let gutter_hovered = gutter_bounds.contains(&event.position);
549 let was_top = cx.was_top_layer(&event.position, stacking_order);
550
551 editor.set_gutter_hovered(gutter_hovered, cx);
552
553 // Don't trigger hover popover if mouse is hovering over context menu
554 if text_hovered && was_top {
555 let point_for_position = position_map.point_for_position(text_bounds, event.position);
556
557 match point_for_position.as_valid() {
558 Some(point) => {
559 update_go_to_definition_link(
560 editor,
561 Some(GoToDefinitionTrigger::Text(point)),
562 modifiers.command,
563 modifiers.shift,
564 cx,
565 );
566 hover_at(editor, Some(point), cx);
567 }
568 None => {
569 update_inlay_link_and_hover_points(
570 &position_map.snapshot,
571 point_for_position,
572 editor,
573 modifiers.command,
574 modifiers.shift,
575 cx,
576 );
577 }
578 }
579 } else {
580 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
581 hover_at(editor, None, cx);
582 if gutter_hovered && was_top {
583 cx.stop_propagation();
584 }
585 }
586 }
587
588 fn scroll(
589 editor: &mut Editor,
590 event: &ScrollWheelEvent,
591 position_map: &PositionMap,
592 bounds: &InteractiveBounds,
593 cx: &mut ViewContext<Editor>,
594 ) {
595 if !bounds.visibly_contains(&event.position, cx) {
596 return;
597 }
598
599 let line_height = position_map.line_height;
600 let max_glyph_width = position_map.em_width;
601 let (delta, axis) = match event.delta {
602 gpui::ScrollDelta::Pixels(mut pixels) => {
603 //Trackpad
604 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
605 (pixels, axis)
606 }
607
608 gpui::ScrollDelta::Lines(lines) => {
609 //Not trackpad
610 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
611 (pixels, None)
612 }
613 };
614
615 let scroll_position = position_map.snapshot.scroll_position();
616 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
617 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
618 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
619 editor.scroll(scroll_position, axis, cx);
620 cx.stop_propagation();
621 }
622
623 fn paint_background(
624 &self,
625 gutter_bounds: Bounds<Pixels>,
626 text_bounds: Bounds<Pixels>,
627 layout: &LayoutState,
628 cx: &mut WindowContext,
629 ) {
630 let bounds = gutter_bounds.union(&text_bounds);
631 let scroll_top =
632 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
633 let gutter_bg = cx.theme().colors().editor_gutter_background;
634 cx.paint_quad(fill(gutter_bounds, gutter_bg));
635 cx.paint_quad(fill(text_bounds, self.style.background));
636
637 if let EditorMode::Full = layout.mode {
638 let mut active_rows = layout.active_rows.iter().peekable();
639 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
640 let mut end_row = *start_row;
641 while active_rows.peek().map_or(false, |r| {
642 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
643 }) {
644 active_rows.next().unwrap();
645 end_row += 1;
646 }
647
648 if !contains_non_empty_selection {
649 let origin = point(
650 bounds.origin.x,
651 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
652 - scroll_top,
653 );
654 let size = size(
655 bounds.size.width,
656 layout.position_map.line_height * (end_row - start_row + 1) as f32,
657 );
658 let active_line_bg = cx.theme().colors().editor_active_line_background;
659 cx.paint_quad(fill(Bounds { origin, size }, active_line_bg));
660 }
661 }
662
663 if let Some(highlighted_rows) = &layout.highlighted_rows {
664 let origin = point(
665 bounds.origin.x,
666 bounds.origin.y
667 + (layout.position_map.line_height * highlighted_rows.start as f32)
668 - scroll_top,
669 );
670 let size = size(
671 bounds.size.width,
672 layout.position_map.line_height * highlighted_rows.len() as f32,
673 );
674 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
675 cx.paint_quad(fill(Bounds { origin, size }, highlighted_line_bg));
676 }
677
678 let scroll_left =
679 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
680
681 for (wrap_position, active) in layout.wrap_guides.iter() {
682 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
683 - scroll_left;
684
685 if x < text_bounds.origin.x
686 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
687 {
688 continue;
689 }
690
691 let color = if *active {
692 cx.theme().colors().editor_active_wrap_guide
693 } else {
694 cx.theme().colors().editor_wrap_guide
695 };
696 cx.paint_quad(fill(
697 Bounds {
698 origin: point(x, text_bounds.origin.y),
699 size: size(px(1.), text_bounds.size.height),
700 },
701 color,
702 ));
703 }
704 }
705 }
706
707 fn paint_gutter(
708 &mut self,
709 bounds: Bounds<Pixels>,
710 layout: &mut LayoutState,
711 cx: &mut WindowContext,
712 ) {
713 let line_height = layout.position_map.line_height;
714
715 let scroll_position = layout.position_map.snapshot.scroll_position();
716 let scroll_top = scroll_position.y * line_height;
717
718 let show_gutter = matches!(
719 ProjectSettings::get_global(cx).git.git_gutter,
720 Some(GitGutterSetting::TrackedFiles)
721 );
722
723 if show_gutter {
724 Self::paint_diff_hunks(bounds, layout, cx);
725 }
726
727 for (ix, line) in layout.line_numbers.iter().enumerate() {
728 if let Some(line) = line {
729 let line_origin = bounds.origin
730 + point(
731 bounds.size.width - line.width - layout.gutter_padding,
732 ix as f32 * line_height - (scroll_top % line_height),
733 );
734
735 line.paint(line_origin, line_height, cx);
736 }
737 }
738
739 cx.with_z_index(1, |cx| {
740 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
741 if let Some(fold_indicator) = fold_indicator {
742 let mut fold_indicator = fold_indicator.into_any_element();
743 let available_space = size(
744 AvailableSpace::MinContent,
745 AvailableSpace::Definite(line_height * 0.55),
746 );
747 let fold_indicator_size = fold_indicator.measure(available_space, cx);
748
749 let position = point(
750 bounds.size.width - layout.gutter_padding,
751 ix as f32 * line_height - (scroll_top % line_height),
752 );
753 let centering_offset = point(
754 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width)
755 / 2.,
756 (line_height - fold_indicator_size.height) / 2.,
757 );
758 let origin = bounds.origin + position + centering_offset;
759 fold_indicator.draw(origin, available_space, cx);
760 }
761 }
762
763 if let Some(indicator) = layout.code_actions_indicator.take() {
764 let mut button = indicator.button.into_any_element();
765 let available_space = size(
766 AvailableSpace::MinContent,
767 AvailableSpace::Definite(line_height),
768 );
769 let indicator_size = button.measure(available_space, cx);
770
771 let mut x = Pixels::ZERO;
772 let mut y = indicator.row as f32 * line_height - scroll_top;
773 // Center indicator.
774 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
775 y += (line_height - indicator_size.height) / 2.;
776
777 button.draw(bounds.origin + point(x, y), available_space, cx);
778 }
779 });
780 }
781
782 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
783 let line_height = layout.position_map.line_height;
784
785 let scroll_position = layout.position_map.snapshot.scroll_position();
786 let scroll_top = scroll_position.y * line_height;
787
788 for hunk in &layout.display_hunks {
789 let (display_row_range, status) = match hunk {
790 //TODO: This rendering is entirely a horrible hack
791 &DisplayDiffHunk::Folded { display_row: row } => {
792 let start_y = row as f32 * line_height - scroll_top;
793 let end_y = start_y + line_height;
794
795 let width = 0.275 * line_height;
796 let highlight_origin = bounds.origin + point(-width, start_y);
797 let highlight_size = size(width * 2., end_y - start_y);
798 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
799 cx.paint_quad(quad(
800 highlight_bounds,
801 Corners::all(1. * line_height),
802 gpui::yellow(), // todo!("use the right color")
803 Edges::default(),
804 transparent_black(),
805 ));
806
807 continue;
808 }
809
810 DisplayDiffHunk::Unfolded {
811 display_row_range,
812 status,
813 } => (display_row_range, status),
814 };
815
816 let color = match status {
817 DiffHunkStatus::Added => cx.theme().status().created,
818 DiffHunkStatus::Modified => cx.theme().status().modified,
819
820 //TODO: This rendering is entirely a horrible hack
821 DiffHunkStatus::Removed => {
822 let row = display_row_range.start;
823
824 let offset = line_height / 2.;
825 let start_y = row as f32 * line_height - offset - scroll_top;
826 let end_y = start_y + line_height;
827
828 let width = 0.275 * line_height;
829 let highlight_origin = bounds.origin + point(-width, start_y);
830 let highlight_size = size(width * 2., end_y - start_y);
831 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
832 cx.paint_quad(quad(
833 highlight_bounds,
834 Corners::all(1. * line_height),
835 cx.theme().status().deleted,
836 Edges::default(),
837 transparent_black(),
838 ));
839
840 continue;
841 }
842 };
843
844 let start_row = display_row_range.start;
845 let end_row = display_row_range.end;
846
847 let start_y = start_row as f32 * line_height - scroll_top;
848 let end_y = end_row as f32 * line_height - scroll_top;
849
850 let width = 0.275 * line_height;
851 let highlight_origin = bounds.origin + point(-width, start_y);
852 let highlight_size = size(width * 2., end_y - start_y);
853 let highlight_bounds = Bounds::new(highlight_origin, highlight_size);
854 cx.paint_quad(quad(
855 highlight_bounds,
856 Corners::all(0.05 * line_height),
857 color, // todo!("use the right color")
858 Edges::default(),
859 transparent_black(),
860 ));
861 }
862 }
863
864 fn paint_text(
865 &mut self,
866 text_bounds: Bounds<Pixels>,
867 layout: &mut LayoutState,
868 cx: &mut WindowContext,
869 ) {
870 let start_row = layout.visible_display_row_range.start;
871 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
872 let line_end_overshoot = 0.15 * layout.position_map.line_height;
873 let whitespace_setting = self
874 .editor
875 .read(cx)
876 .buffer
877 .read(cx)
878 .settings_at(0, cx)
879 .show_whitespaces;
880
881 cx.with_content_mask(
882 Some(ContentMask {
883 bounds: text_bounds,
884 }),
885 |cx| {
886 let interactive_text_bounds = InteractiveBounds {
887 bounds: text_bounds,
888 stacking_order: cx.stacking_order().clone(),
889 };
890 if interactive_text_bounds.visibly_contains(&cx.mouse_position(), cx) {
891 if self
892 .editor
893 .read(cx)
894 .link_go_to_definition_state
895 .definitions
896 .is_empty()
897 {
898 cx.set_cursor_style(CursorStyle::IBeam);
899 } else {
900 cx.set_cursor_style(CursorStyle::PointingHand);
901 }
902 }
903
904 let fold_corner_radius = 0.15 * layout.position_map.line_height;
905 cx.with_element_id(Some("folds"), |cx| {
906 let snapshot = &layout.position_map.snapshot;
907 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
908 let fold_range = fold.range.clone();
909 let display_range = fold.range.start.to_display_point(&snapshot)
910 ..fold.range.end.to_display_point(&snapshot);
911 debug_assert_eq!(display_range.start.row(), display_range.end.row());
912 let row = display_range.start.row();
913
914 let line_layout = &layout.position_map.line_layouts
915 [(row - layout.visible_display_row_range.start) as usize]
916 .line;
917 let start_x = content_origin.x
918 + line_layout.x_for_index(display_range.start.column() as usize)
919 - layout.position_map.scroll_position.x;
920 let start_y = content_origin.y
921 + row as f32 * layout.position_map.line_height
922 - layout.position_map.scroll_position.y;
923 let end_x = content_origin.x
924 + line_layout.x_for_index(display_range.end.column() as usize)
925 - layout.position_map.scroll_position.x;
926
927 let fold_bounds = Bounds {
928 origin: point(start_x, start_y),
929 size: size(end_x - start_x, layout.position_map.line_height),
930 };
931
932 let fold_background = cx.with_z_index(1, |cx| {
933 div()
934 .id(fold.id)
935 .size_full()
936 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
937 .on_click(cx.listener_for(
938 &self.editor,
939 move |editor: &mut Editor, _, cx| {
940 editor.unfold_ranges(
941 [fold_range.start..fold_range.end],
942 true,
943 false,
944 cx,
945 );
946 cx.stop_propagation();
947 },
948 ))
949 .draw_and_update_state(
950 fold_bounds.origin,
951 fold_bounds.size,
952 cx,
953 |fold_element_state, cx| {
954 if fold_element_state.is_active() {
955 cx.theme().colors().ghost_element_active
956 } else if fold_bounds.contains(&cx.mouse_position()) {
957 cx.theme().colors().ghost_element_hover
958 } else {
959 cx.theme().colors().ghost_element_background
960 }
961 },
962 )
963 });
964
965 self.paint_highlighted_range(
966 display_range.clone(),
967 fold_background,
968 fold_corner_radius,
969 fold_corner_radius * 2.,
970 layout,
971 content_origin,
972 text_bounds,
973 cx,
974 );
975 }
976 });
977
978 for (range, color) in &layout.highlighted_ranges {
979 self.paint_highlighted_range(
980 range.clone(),
981 *color,
982 Pixels::ZERO,
983 line_end_overshoot,
984 layout,
985 content_origin,
986 text_bounds,
987 cx,
988 );
989 }
990
991 let mut cursors = SmallVec::<[Cursor; 32]>::new();
992 let corner_radius = 0.15 * layout.position_map.line_height;
993 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
994
995 for (selection_style, selections) in &layout.selections {
996 for selection in selections {
997 self.paint_highlighted_range(
998 selection.range.clone(),
999 selection_style.selection,
1000 corner_radius,
1001 corner_radius * 2.,
1002 layout,
1003 content_origin,
1004 text_bounds,
1005 cx,
1006 );
1007
1008 if selection.is_local && !selection.range.is_empty() {
1009 invisible_display_ranges.push(selection.range.clone());
1010 }
1011
1012 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
1013 let cursor_position = selection.head;
1014 if layout
1015 .visible_display_row_range
1016 .contains(&cursor_position.row())
1017 {
1018 let cursor_row_layout = &layout.position_map.line_layouts
1019 [(cursor_position.row() - start_row) as usize]
1020 .line;
1021 let cursor_column = cursor_position.column() as usize;
1022
1023 let cursor_character_x =
1024 cursor_row_layout.x_for_index(cursor_column);
1025 let mut block_width = cursor_row_layout
1026 .x_for_index(cursor_column + 1)
1027 - cursor_character_x;
1028 if block_width == Pixels::ZERO {
1029 block_width = layout.position_map.em_width;
1030 }
1031 let block_text = if let CursorShape::Block = selection.cursor_shape
1032 {
1033 layout
1034 .position_map
1035 .snapshot
1036 .chars_at(cursor_position)
1037 .next()
1038 .and_then(|(character, _)| {
1039 // todo!() currently shape_line panics if text conatins newlines
1040 let text = if character == '\n' {
1041 SharedString::from(" ")
1042 } else {
1043 SharedString::from(character.to_string())
1044 };
1045 let len = text.len();
1046 cx.text_system()
1047 .shape_line(
1048 text,
1049 cursor_row_layout.font_size,
1050 &[TextRun {
1051 len,
1052 font: self.style.text.font(),
1053 color: self.style.background,
1054 background_color: None,
1055 underline: None,
1056 }],
1057 )
1058 .log_err()
1059 })
1060 } else {
1061 None
1062 };
1063
1064 let x = cursor_character_x - layout.position_map.scroll_position.x;
1065 let y = cursor_position.row() as f32
1066 * layout.position_map.line_height
1067 - layout.position_map.scroll_position.y;
1068 if selection.is_newest {
1069 self.editor.update(cx, |editor, _| {
1070 editor.pixel_position_of_newest_cursor = Some(point(
1071 text_bounds.origin.x + x + block_width / 2.,
1072 text_bounds.origin.y
1073 + y
1074 + layout.position_map.line_height / 2.,
1075 ))
1076 });
1077 }
1078 cursors.push(Cursor {
1079 color: selection_style.cursor,
1080 block_width,
1081 origin: point(x, y),
1082 line_height: layout.position_map.line_height,
1083 shape: selection.cursor_shape,
1084 block_text,
1085 });
1086 }
1087 }
1088 }
1089 }
1090
1091 for (ix, line_with_invisibles) in
1092 layout.position_map.line_layouts.iter().enumerate()
1093 {
1094 let row = start_row + ix as u32;
1095 line_with_invisibles.draw(
1096 layout,
1097 row,
1098 content_origin,
1099 whitespace_setting,
1100 &invisible_display_ranges,
1101 cx,
1102 )
1103 }
1104
1105 cx.with_z_index(0, |cx| {
1106 for cursor in cursors {
1107 cursor.paint(content_origin, cx);
1108 }
1109 });
1110 },
1111 )
1112 }
1113
1114 fn paint_overlays(
1115 &mut self,
1116 text_bounds: Bounds<Pixels>,
1117 layout: &mut LayoutState,
1118 cx: &mut WindowContext,
1119 ) {
1120 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
1121 let start_row = layout.visible_display_row_range.start;
1122 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1123 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1124 let context_menu_size = context_menu.measure(available_space, cx);
1125
1126 let cursor_row_layout =
1127 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1128 let x = cursor_row_layout.x_for_index(position.column() as usize)
1129 - layout.position_map.scroll_position.x;
1130 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1131 - layout.position_map.scroll_position.y;
1132 let mut list_origin = content_origin + point(x, y);
1133 let list_width = context_menu_size.width;
1134 let list_height = context_menu_size.height;
1135
1136 // Snap the right edge of the list to the right edge of the window if
1137 // its horizontal bounds overflow.
1138 if list_origin.x + list_width > cx.viewport_size().width {
1139 list_origin.x = (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1140 }
1141
1142 if list_origin.y + list_height > text_bounds.lower_right().y {
1143 list_origin.y -= layout.position_map.line_height + list_height;
1144 }
1145
1146 cx.break_content_mask(|cx| context_menu.draw(list_origin, available_space, cx));
1147 }
1148
1149 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1150 let available_space = size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1151
1152 // This is safe because we check on layout whether the required row is available
1153 let hovered_row_layout =
1154 &layout.position_map.line_layouts[(position.row() - start_row) as usize].line;
1155
1156 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1157 // height. This is the size we will use to decide whether to render popovers above or below
1158 // the hovered line.
1159 let first_size = hover_popovers[0].measure(available_space, cx);
1160 let height_to_reserve =
1161 first_size.height + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1162
1163 // Compute Hovered Point
1164 let x = hovered_row_layout.x_for_index(position.column() as usize)
1165 - layout.position_map.scroll_position.x;
1166 let y = position.row() as f32 * layout.position_map.line_height
1167 - layout.position_map.scroll_position.y;
1168 let hovered_point = content_origin + point(x, y);
1169
1170 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1171 // There is enough space above. Render popovers above the hovered point
1172 let mut current_y = hovered_point.y;
1173 for mut hover_popover in hover_popovers {
1174 let size = hover_popover.measure(available_space, cx);
1175 let mut popover_origin = point(hovered_point.x, current_y - size.height);
1176
1177 let x_out_of_bounds =
1178 text_bounds.upper_right().x - (popover_origin.x + size.width);
1179 if x_out_of_bounds < Pixels::ZERO {
1180 popover_origin.x = popover_origin.x + x_out_of_bounds;
1181 }
1182
1183 cx.break_content_mask(|cx| {
1184 hover_popover.draw(popover_origin, available_space, cx)
1185 });
1186
1187 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1188 }
1189 } else {
1190 // There is not enough space above. Render popovers below the hovered point
1191 let mut current_y = hovered_point.y + layout.position_map.line_height;
1192 for mut hover_popover in hover_popovers {
1193 let size = hover_popover.measure(available_space, cx);
1194 let mut popover_origin = point(hovered_point.x, current_y);
1195
1196 let x_out_of_bounds =
1197 text_bounds.upper_right().x - (popover_origin.x + size.width);
1198 if x_out_of_bounds < Pixels::ZERO {
1199 popover_origin.x = popover_origin.x + x_out_of_bounds;
1200 }
1201
1202 hover_popover.draw(popover_origin, available_space, cx);
1203
1204 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1205 }
1206 }
1207 }
1208
1209 if let Some(mouse_context_menu) = self.editor.read(cx).mouse_context_menu.as_ref() {
1210 let element = overlay()
1211 .position(mouse_context_menu.position)
1212 .child(mouse_context_menu.context_menu.clone())
1213 .anchor(AnchorCorner::TopLeft)
1214 .snap_to_window();
1215 element.into_any().draw(
1216 gpui::Point::default(),
1217 size(AvailableSpace::MinContent, AvailableSpace::MinContent),
1218 cx,
1219 );
1220 }
1221 }
1222
1223 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1224 bounds.upper_right().x - self.style.scrollbar_width
1225 }
1226
1227 fn paint_scrollbar(
1228 &mut self,
1229 bounds: Bounds<Pixels>,
1230 layout: &mut LayoutState,
1231 cx: &mut WindowContext,
1232 ) {
1233 if layout.mode != EditorMode::Full {
1234 return;
1235 }
1236
1237 let top = bounds.origin.y;
1238 let bottom = bounds.lower_left().y;
1239 let right = bounds.lower_right().x;
1240 let left = self.scrollbar_left(&bounds);
1241 let row_range = layout.scrollbar_row_range.clone();
1242 let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1243
1244 let mut height = bounds.size.height;
1245 let mut first_row_y_offset = px(0.0);
1246
1247 // Impose a minimum height on the scrollbar thumb
1248 let row_height = height / max_row;
1249 let min_thumb_height = layout.position_map.line_height;
1250 let thumb_height = (row_range.end - row_range.start) * row_height;
1251 if thumb_height < min_thumb_height {
1252 first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1253 height -= min_thumb_height - thumb_height;
1254 }
1255
1256 let y_for_row = |row: f32| -> Pixels { top + first_row_y_offset + row * row_height };
1257
1258 let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1259 let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1260 let track_bounds = Bounds::from_corners(point(left, top), point(right, bottom));
1261 let thumb_bounds = Bounds::from_corners(point(left, thumb_top), point(right, thumb_bottom));
1262
1263 if layout.show_scrollbars {
1264 cx.paint_quad(quad(
1265 track_bounds,
1266 Corners::default(),
1267 cx.theme().colors().scrollbar_track_background,
1268 Edges {
1269 top: Pixels::ZERO,
1270 right: Pixels::ZERO,
1271 bottom: Pixels::ZERO,
1272 left: px(1.),
1273 },
1274 cx.theme().colors().scrollbar_track_border,
1275 ));
1276 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1277 if layout.is_singleton && scrollbar_settings.selections {
1278 let start_anchor = Anchor::min();
1279 let end_anchor = Anchor::max();
1280 let background_ranges = self
1281 .editor
1282 .read(cx)
1283 .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1284 start_anchor..end_anchor,
1285 &layout.position_map.snapshot,
1286 50000,
1287 );
1288 for range in background_ranges {
1289 let start_y = y_for_row(range.start().row() as f32);
1290 let mut end_y = y_for_row(range.end().row() as f32);
1291 if end_y - start_y < px(1.) {
1292 end_y = start_y + px(1.);
1293 }
1294 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1295 cx.paint_quad(quad(
1296 bounds,
1297 Corners::default(),
1298 cx.theme().status().info,
1299 Edges {
1300 top: Pixels::ZERO,
1301 right: px(1.),
1302 bottom: Pixels::ZERO,
1303 left: px(1.),
1304 },
1305 cx.theme().colors().scrollbar_thumb_border,
1306 ));
1307 }
1308 }
1309
1310 if layout.is_singleton && scrollbar_settings.git_diff {
1311 for hunk in layout
1312 .position_map
1313 .snapshot
1314 .buffer_snapshot
1315 .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1316 {
1317 let start_display = Point::new(hunk.buffer_range.start, 0)
1318 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1319 let end_display = Point::new(hunk.buffer_range.end, 0)
1320 .to_display_point(&layout.position_map.snapshot.display_snapshot);
1321 let start_y = y_for_row(start_display.row() as f32);
1322 let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1323 y_for_row((end_display.row() + 1) as f32)
1324 } else {
1325 y_for_row((end_display.row()) as f32)
1326 };
1327
1328 if end_y - start_y < px(1.) {
1329 end_y = start_y + px(1.);
1330 }
1331 let bounds = Bounds::from_corners(point(left, start_y), point(right, end_y));
1332
1333 let color = match hunk.status() {
1334 DiffHunkStatus::Added => cx.theme().status().created,
1335 DiffHunkStatus::Modified => cx.theme().status().modified,
1336 DiffHunkStatus::Removed => cx.theme().status().deleted,
1337 };
1338 cx.paint_quad(quad(
1339 bounds,
1340 Corners::default(),
1341 color,
1342 Edges {
1343 top: Pixels::ZERO,
1344 right: px(1.),
1345 bottom: Pixels::ZERO,
1346 left: px(1.),
1347 },
1348 cx.theme().colors().scrollbar_thumb_border,
1349 ));
1350 }
1351 }
1352
1353 cx.paint_quad(quad(
1354 thumb_bounds,
1355 Corners::default(),
1356 cx.theme().colors().scrollbar_thumb_background,
1357 Edges {
1358 top: Pixels::ZERO,
1359 right: px(1.),
1360 bottom: Pixels::ZERO,
1361 left: px(1.),
1362 },
1363 cx.theme().colors().scrollbar_thumb_border,
1364 ));
1365 }
1366
1367 let interactive_track_bounds = InteractiveBounds {
1368 bounds: track_bounds,
1369 stacking_order: cx.stacking_order().clone(),
1370 };
1371 let mut mouse_position = cx.mouse_position();
1372 if interactive_track_bounds.visibly_contains(&mouse_position, cx) {
1373 cx.set_cursor_style(CursorStyle::Arrow);
1374 }
1375
1376 cx.on_mouse_event({
1377 let editor = self.editor.clone();
1378 move |event: &MouseMoveEvent, phase, cx| {
1379 if phase == DispatchPhase::Capture {
1380 return;
1381 }
1382
1383 editor.update(cx, |editor, cx| {
1384 if event.pressed_button == Some(MouseButton::Left)
1385 && editor.scroll_manager.is_dragging_scrollbar()
1386 {
1387 let y = mouse_position.y;
1388 let new_y = event.position.y;
1389 if (track_bounds.top()..track_bounds.bottom()).contains(&y) {
1390 let mut position = editor.scroll_position(cx);
1391 position.y += (new_y - y) * (max_row as f32) / height;
1392 if position.y < 0.0 {
1393 position.y = 0.0;
1394 }
1395 editor.set_scroll_position(position, cx);
1396 }
1397
1398 mouse_position = event.position;
1399 cx.stop_propagation();
1400 } else {
1401 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1402 if interactive_track_bounds.visibly_contains(&event.position, cx) {
1403 editor.scroll_manager.show_scrollbar(cx);
1404 }
1405 }
1406 })
1407 }
1408 });
1409
1410 if self.editor.read(cx).scroll_manager.is_dragging_scrollbar() {
1411 cx.on_mouse_event({
1412 let editor = self.editor.clone();
1413 move |_: &MouseUpEvent, phase, cx| {
1414 if phase == DispatchPhase::Capture {
1415 return;
1416 }
1417
1418 editor.update(cx, |editor, cx| {
1419 editor.scroll_manager.set_is_dragging_scrollbar(false, cx);
1420 cx.stop_propagation();
1421 });
1422 }
1423 });
1424 } else {
1425 cx.on_mouse_event({
1426 let editor = self.editor.clone();
1427 move |event: &MouseDownEvent, phase, cx| {
1428 if phase == DispatchPhase::Capture {
1429 return;
1430 }
1431
1432 editor.update(cx, |editor, cx| {
1433 if track_bounds.contains(&event.position) {
1434 editor.scroll_manager.set_is_dragging_scrollbar(true, cx);
1435
1436 let y = event.position.y;
1437 if y < thumb_top || thumb_bottom < y {
1438 let center_row =
1439 ((y - top) * max_row as f32 / height).round() as u32;
1440 let top_row = center_row
1441 .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1442 let mut position = editor.scroll_position(cx);
1443 position.y = top_row as f32;
1444 editor.set_scroll_position(position, cx);
1445 } else {
1446 editor.scroll_manager.show_scrollbar(cx);
1447 }
1448
1449 cx.stop_propagation();
1450 }
1451 });
1452 }
1453 });
1454 }
1455 }
1456
1457 #[allow(clippy::too_many_arguments)]
1458 fn paint_highlighted_range(
1459 &self,
1460 range: Range<DisplayPoint>,
1461 color: Hsla,
1462 corner_radius: Pixels,
1463 line_end_overshoot: Pixels,
1464 layout: &LayoutState,
1465 content_origin: gpui::Point<Pixels>,
1466 bounds: Bounds<Pixels>,
1467 cx: &mut WindowContext,
1468 ) {
1469 let start_row = layout.visible_display_row_range.start;
1470 let end_row = layout.visible_display_row_range.end;
1471 if range.start != range.end {
1472 let row_range = if range.end.column() == 0 {
1473 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1474 } else {
1475 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1476 };
1477
1478 let highlighted_range = HighlightedRange {
1479 color,
1480 line_height: layout.position_map.line_height,
1481 corner_radius,
1482 start_y: content_origin.y
1483 + row_range.start as f32 * layout.position_map.line_height
1484 - layout.position_map.scroll_position.y,
1485 lines: row_range
1486 .into_iter()
1487 .map(|row| {
1488 let line_layout =
1489 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1490 HighlightedRangeLine {
1491 start_x: if row == range.start.row() {
1492 content_origin.x
1493 + line_layout.x_for_index(range.start.column() as usize)
1494 - layout.position_map.scroll_position.x
1495 } else {
1496 content_origin.x - layout.position_map.scroll_position.x
1497 },
1498 end_x: if row == range.end.row() {
1499 content_origin.x
1500 + line_layout.x_for_index(range.end.column() as usize)
1501 - layout.position_map.scroll_position.x
1502 } else {
1503 content_origin.x + line_layout.width + line_end_overshoot
1504 - layout.position_map.scroll_position.x
1505 },
1506 }
1507 })
1508 .collect(),
1509 };
1510
1511 highlighted_range.paint(bounds, cx);
1512 }
1513 }
1514
1515 fn paint_blocks(
1516 &mut self,
1517 bounds: Bounds<Pixels>,
1518 layout: &mut LayoutState,
1519 cx: &mut WindowContext,
1520 ) {
1521 let scroll_position = layout.position_map.snapshot.scroll_position();
1522 let scroll_left = scroll_position.x * layout.position_map.em_width;
1523 let scroll_top = scroll_position.y * layout.position_map.line_height;
1524
1525 for mut block in layout.blocks.drain(..) {
1526 let mut origin = bounds.origin
1527 + point(
1528 Pixels::ZERO,
1529 block.row as f32 * layout.position_map.line_height - scroll_top,
1530 );
1531 if !matches!(block.style, BlockStyle::Sticky) {
1532 origin += point(-scroll_left, Pixels::ZERO);
1533 }
1534 block.element.draw(origin, block.available_space, cx);
1535 }
1536 }
1537
1538 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1539 let style = &self.style;
1540 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1541 let layout = cx
1542 .text_system()
1543 .shape_line(
1544 SharedString::from(" ".repeat(column)),
1545 font_size,
1546 &[TextRun {
1547 len: column,
1548 font: style.text.font(),
1549 color: Hsla::default(),
1550 background_color: None,
1551 underline: None,
1552 }],
1553 )
1554 .unwrap();
1555
1556 layout.width
1557 }
1558
1559 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1560 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1561 self.column_pixels(digit_count, cx)
1562 }
1563
1564 //Folds contained in a hunk are ignored apart from shrinking visual size
1565 //If a fold contains any hunks then that fold line is marked as modified
1566 fn layout_git_gutters(
1567 &self,
1568 display_rows: Range<u32>,
1569 snapshot: &EditorSnapshot,
1570 ) -> Vec<DisplayDiffHunk> {
1571 let buffer_snapshot = &snapshot.buffer_snapshot;
1572
1573 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1574 .to_point(snapshot)
1575 .row;
1576 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1577 .to_point(snapshot)
1578 .row;
1579
1580 buffer_snapshot
1581 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1582 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1583 .dedup()
1584 .collect()
1585 }
1586
1587 fn calculate_relative_line_numbers(
1588 &self,
1589 snapshot: &EditorSnapshot,
1590 rows: &Range<u32>,
1591 relative_to: Option<u32>,
1592 ) -> HashMap<u32, u32> {
1593 let mut relative_rows: HashMap<u32, u32> = Default::default();
1594 let Some(relative_to) = relative_to else {
1595 return relative_rows;
1596 };
1597
1598 let start = rows.start.min(relative_to);
1599 let end = rows.end.max(relative_to);
1600
1601 let buffer_rows = snapshot
1602 .buffer_rows(start)
1603 .take(1 + (end - start) as usize)
1604 .collect::<Vec<_>>();
1605
1606 let head_idx = relative_to - start;
1607 let mut delta = 1;
1608 let mut i = head_idx + 1;
1609 while i < buffer_rows.len() as u32 {
1610 if buffer_rows[i as usize].is_some() {
1611 if rows.contains(&(i + start)) {
1612 relative_rows.insert(i + start, delta);
1613 }
1614 delta += 1;
1615 }
1616 i += 1;
1617 }
1618 delta = 1;
1619 i = head_idx.min(buffer_rows.len() as u32 - 1);
1620 while i > 0 && buffer_rows[i as usize].is_none() {
1621 i -= 1;
1622 }
1623
1624 while i > 0 {
1625 i -= 1;
1626 if buffer_rows[i as usize].is_some() {
1627 if rows.contains(&(i + start)) {
1628 relative_rows.insert(i + start, delta);
1629 }
1630 delta += 1;
1631 }
1632 }
1633
1634 relative_rows
1635 }
1636
1637 fn shape_line_numbers(
1638 &self,
1639 rows: Range<u32>,
1640 active_rows: &BTreeMap<u32, bool>,
1641 newest_selection_head: DisplayPoint,
1642 is_singleton: bool,
1643 snapshot: &EditorSnapshot,
1644 cx: &ViewContext<Editor>,
1645 ) -> (
1646 Vec<Option<ShapedLine>>,
1647 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1648 ) {
1649 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1650 let include_line_numbers = snapshot.mode == EditorMode::Full;
1651 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1652 let mut fold_statuses = Vec::with_capacity(rows.len());
1653 let mut line_number = String::new();
1654 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1655 let relative_to = if is_relative {
1656 Some(newest_selection_head.row())
1657 } else {
1658 None
1659 };
1660
1661 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1662
1663 for (ix, row) in snapshot
1664 .buffer_rows(rows.start)
1665 .take((rows.end - rows.start) as usize)
1666 .enumerate()
1667 {
1668 let display_row = rows.start + ix as u32;
1669 let (active, color) = if active_rows.contains_key(&display_row) {
1670 (true, cx.theme().colors().editor_active_line_number)
1671 } else {
1672 (false, cx.theme().colors().editor_line_number)
1673 };
1674 if let Some(buffer_row) = row {
1675 if include_line_numbers {
1676 line_number.clear();
1677 let default_number = buffer_row + 1;
1678 let number = relative_rows
1679 .get(&(ix as u32 + rows.start))
1680 .unwrap_or(&default_number);
1681 write!(&mut line_number, "{}", number).unwrap();
1682 let run = TextRun {
1683 len: line_number.len(),
1684 font: self.style.text.font(),
1685 color,
1686 background_color: None,
1687 underline: None,
1688 };
1689 let shaped_line = cx
1690 .text_system()
1691 .shape_line(line_number.clone().into(), font_size, &[run])
1692 .unwrap();
1693 shaped_line_numbers.push(Some(shaped_line));
1694 fold_statuses.push(
1695 is_singleton
1696 .then(|| {
1697 snapshot
1698 .fold_for_line(buffer_row)
1699 .map(|fold_status| (fold_status, buffer_row, active))
1700 })
1701 .flatten(),
1702 )
1703 }
1704 } else {
1705 fold_statuses.push(None);
1706 shaped_line_numbers.push(None);
1707 }
1708 }
1709
1710 (shaped_line_numbers, fold_statuses)
1711 }
1712
1713 fn layout_lines(
1714 &self,
1715 rows: Range<u32>,
1716 line_number_layouts: &[Option<ShapedLine>],
1717 snapshot: &EditorSnapshot,
1718 cx: &ViewContext<Editor>,
1719 ) -> Vec<LineWithInvisibles> {
1720 if rows.start >= rows.end {
1721 return Vec::new();
1722 }
1723
1724 // Show the placeholder when the editor is empty
1725 if snapshot.is_empty() {
1726 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1727 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1728 let placeholder_text = snapshot.placeholder_text();
1729
1730 let placeholder_lines = placeholder_text
1731 .as_ref()
1732 .map_or("", AsRef::as_ref)
1733 .split('\n')
1734 .skip(rows.start as usize)
1735 .chain(iter::repeat(""))
1736 .take(rows.len());
1737 placeholder_lines
1738 .filter_map(move |line| {
1739 let run = TextRun {
1740 len: line.len(),
1741 font: self.style.text.font(),
1742 color: placeholder_color,
1743 background_color: None,
1744 underline: Default::default(),
1745 };
1746 cx.text_system()
1747 .shape_line(line.to_string().into(), font_size, &[run])
1748 .log_err()
1749 })
1750 .map(|line| LineWithInvisibles {
1751 line,
1752 invisibles: Vec::new(),
1753 })
1754 .collect()
1755 } else {
1756 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1757 LineWithInvisibles::from_chunks(
1758 chunks,
1759 &self.style.text,
1760 MAX_LINE_LEN,
1761 rows.len() as usize,
1762 line_number_layouts,
1763 snapshot.mode,
1764 cx,
1765 )
1766 }
1767 }
1768
1769 fn compute_layout(&mut self, bounds: Bounds<Pixels>, cx: &mut WindowContext) -> LayoutState {
1770 self.editor.update(cx, |editor, cx| {
1771 let snapshot = editor.snapshot(cx);
1772 let style = self.style.clone();
1773
1774 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1775 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1776 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1777 let em_width = cx
1778 .text_system()
1779 .typographic_bounds(font_id, font_size, 'm')
1780 .unwrap()
1781 .size
1782 .width;
1783 let em_advance = cx
1784 .text_system()
1785 .advance(font_id, font_size, 'm')
1786 .unwrap()
1787 .width;
1788
1789 let gutter_padding;
1790 let gutter_width;
1791 let gutter_margin;
1792 if snapshot.show_gutter {
1793 let descent = cx.text_system().descent(font_id, font_size);
1794
1795 let gutter_padding_factor = 3.5;
1796 gutter_padding = (em_width * gutter_padding_factor).round();
1797 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1798 gutter_margin = -descent;
1799 } else {
1800 gutter_padding = Pixels::ZERO;
1801 gutter_width = Pixels::ZERO;
1802 gutter_margin = Pixels::ZERO;
1803 };
1804
1805 editor.gutter_width = gutter_width;
1806
1807 let text_width = bounds.size.width - gutter_width;
1808 let overscroll = size(em_width, px(0.));
1809 // todo!()
1810 // let snapshot = {
1811 // editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1812
1813 // let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1814 // let wrap_width = match editor.soft_wrap_mode(cx) {
1815 // SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1816 // SoftWrap::EditorWidth => editor_width,
1817 // SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1818 // };
1819
1820 // if editor.set_wrap_width(Some(wrap_width), cx) {
1821 // editor.snapshot(cx)
1822 // } else {
1823 // snapshot
1824 // }
1825 // };
1826
1827 let wrap_guides = editor
1828 .wrap_guides(cx)
1829 .iter()
1830 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1831 .collect::<SmallVec<[_; 2]>>();
1832
1833 let gutter_size = size(gutter_width, bounds.size.height);
1834 let text_size = size(text_width, bounds.size.height);
1835
1836 let autoscroll_horizontally =
1837 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1838 let mut snapshot = editor.snapshot(cx);
1839
1840 let scroll_position = snapshot.scroll_position();
1841 // The scroll position is a fractional point, the whole number of which represents
1842 // the top of the window in terms of display rows.
1843 let start_row = scroll_position.y as u32;
1844 let height_in_lines = f32::from(bounds.size.height / line_height);
1845 let max_row = snapshot.max_point().row();
1846
1847 // Add 1 to ensure selections bleed off screen
1848 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1849
1850 let start_anchor = if start_row == 0 {
1851 Anchor::min()
1852 } else {
1853 snapshot
1854 .buffer_snapshot
1855 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1856 };
1857 let end_anchor = if end_row > max_row {
1858 Anchor::max()
1859 } else {
1860 snapshot
1861 .buffer_snapshot
1862 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1863 };
1864
1865 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1866 let mut active_rows = BTreeMap::new();
1867 let is_singleton = editor.is_singleton(cx);
1868
1869 let highlighted_rows = editor.highlighted_rows();
1870 let highlighted_ranges = editor.background_highlights_in_range(
1871 start_anchor..end_anchor,
1872 &snapshot.display_snapshot,
1873 cx.theme().colors(),
1874 );
1875
1876 let mut newest_selection_head = None;
1877
1878 if editor.show_local_selections {
1879 let mut local_selections: Vec<Selection<Point>> = editor
1880 .selections
1881 .disjoint_in_range(start_anchor..end_anchor, cx);
1882 local_selections.extend(editor.selections.pending(cx));
1883 let mut layouts = Vec::new();
1884 let newest = editor.selections.newest(cx);
1885 for selection in local_selections.drain(..) {
1886 let is_empty = selection.start == selection.end;
1887 let is_newest = selection == newest;
1888
1889 let layout = SelectionLayout::new(
1890 selection,
1891 editor.selections.line_mode,
1892 editor.cursor_shape,
1893 &snapshot.display_snapshot,
1894 is_newest,
1895 true,
1896 );
1897 if is_newest {
1898 newest_selection_head = Some(layout.head);
1899 }
1900
1901 for row in cmp::max(layout.active_rows.start, start_row)
1902 ..=cmp::min(layout.active_rows.end, end_row)
1903 {
1904 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1905 *contains_non_empty_selection |= !is_empty;
1906 }
1907 layouts.push(layout);
1908 }
1909
1910 selections.push((style.local_player, layouts));
1911 }
1912
1913 if let Some(collaboration_hub) = &editor.collaboration_hub {
1914 // When following someone, render the local selections in their color.
1915 if let Some(leader_id) = editor.leader_peer_id {
1916 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1917 if let Some(participant_index) = collaboration_hub
1918 .user_participant_indices(cx)
1919 .get(&collaborator.user_id)
1920 {
1921 if let Some((local_selection_style, _)) = selections.first_mut() {
1922 *local_selection_style = cx
1923 .theme()
1924 .players()
1925 .color_for_participant(participant_index.0);
1926 }
1927 }
1928 }
1929 }
1930
1931 let mut remote_selections = HashMap::default();
1932 for selection in snapshot.remote_selections_in_range(
1933 &(start_anchor..end_anchor),
1934 collaboration_hub.as_ref(),
1935 cx,
1936 ) {
1937 let selection_style = if let Some(participant_index) = selection.participant_index {
1938 cx.theme()
1939 .players()
1940 .color_for_participant(participant_index.0)
1941 } else {
1942 cx.theme().players().absent()
1943 };
1944
1945 // Don't re-render the leader's selections, since the local selections
1946 // match theirs.
1947 if Some(selection.peer_id) == editor.leader_peer_id {
1948 continue;
1949 }
1950
1951 remote_selections
1952 .entry(selection.replica_id)
1953 .or_insert((selection_style, Vec::new()))
1954 .1
1955 .push(SelectionLayout::new(
1956 selection.selection,
1957 selection.line_mode,
1958 selection.cursor_shape,
1959 &snapshot.display_snapshot,
1960 false,
1961 false,
1962 ));
1963 }
1964
1965 selections.extend(remote_selections.into_values());
1966 }
1967
1968 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1969 let show_scrollbars = match scrollbar_settings.show {
1970 ShowScrollbar::Auto => {
1971 // Git
1972 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1973 ||
1974 // Selections
1975 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1976 // Scrollmanager
1977 || editor.scroll_manager.scrollbars_visible()
1978 }
1979 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1980 ShowScrollbar::Always => true,
1981 ShowScrollbar::Never => false,
1982 };
1983
1984 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1985 let newest = editor.selections.newest::<Point>(cx);
1986 SelectionLayout::new(
1987 newest,
1988 editor.selections.line_mode,
1989 editor.cursor_shape,
1990 &snapshot.display_snapshot,
1991 true,
1992 true,
1993 )
1994 .head
1995 });
1996
1997 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1998 start_row..end_row,
1999 &active_rows,
2000 head_for_relative,
2001 is_singleton,
2002 &snapshot,
2003 cx,
2004 );
2005
2006 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2007
2008 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2009
2010 let mut max_visible_line_width = Pixels::ZERO;
2011 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
2012 for line_with_invisibles in &line_layouts {
2013 if line_with_invisibles.line.width > max_visible_line_width {
2014 max_visible_line_width = line_with_invisibles.line.width;
2015 }
2016 }
2017
2018 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
2019 .unwrap()
2020 .width;
2021 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
2022
2023 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
2024 self.layout_blocks(
2025 start_row..end_row,
2026 &snapshot,
2027 bounds.size.width,
2028 scroll_width,
2029 gutter_padding,
2030 gutter_width,
2031 em_width,
2032 gutter_width + gutter_margin,
2033 line_height,
2034 &style,
2035 &line_layouts,
2036 editor,
2037 cx,
2038 )
2039 });
2040
2041 let scroll_max = point(
2042 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
2043 max_row as f32,
2044 );
2045
2046 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
2047
2048 let autoscrolled = if autoscroll_horizontally {
2049 editor.autoscroll_horizontally(
2050 start_row,
2051 text_size.width,
2052 scroll_width,
2053 em_width,
2054 &line_layouts,
2055 cx,
2056 )
2057 } else {
2058 false
2059 };
2060
2061 if clamped || autoscrolled {
2062 snapshot = editor.snapshot(cx);
2063 }
2064
2065 let mut context_menu = None;
2066 let mut code_actions_indicator = None;
2067 if let Some(newest_selection_head) = newest_selection_head {
2068 if (start_row..end_row).contains(&newest_selection_head.row()) {
2069 if editor.context_menu_visible() {
2070 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
2071 context_menu =
2072 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
2073 }
2074
2075 let active = matches!(
2076 editor.context_menu.read().as_ref(),
2077 Some(crate::ContextMenu::CodeActions(_))
2078 );
2079
2080 code_actions_indicator = editor
2081 .render_code_actions_indicator(&style, active, cx)
2082 .map(|element| CodeActionsIndicator {
2083 row: newest_selection_head.row(),
2084 button: element,
2085 });
2086 }
2087 }
2088
2089 let visible_rows = start_row..start_row + line_layouts.len() as u32;
2090 let max_size = size(
2091 (120. * em_width) // Default size
2092 .min(bounds.size.width / 2.) // Shrink to half of the editor width
2093 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
2094 (16. * line_height) // Default size
2095 .min(bounds.size.height / 2.) // Shrink to half of the editor height
2096 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
2097 );
2098
2099 let hover = editor.hover_state.render(
2100 &snapshot,
2101 &style,
2102 visible_rows,
2103 max_size,
2104 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2105 cx,
2106 );
2107
2108 let fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2109 editor.render_fold_indicators(
2110 fold_statuses,
2111 &style,
2112 editor.gutter_hovered,
2113 line_height,
2114 gutter_margin,
2115 cx,
2116 )
2117 });
2118
2119 let invisible_symbol_font_size = font_size / 2.;
2120 let tab_invisible = cx
2121 .text_system()
2122 .shape_line(
2123 "→".into(),
2124 invisible_symbol_font_size,
2125 &[TextRun {
2126 len: "→".len(),
2127 font: self.style.text.font(),
2128 color: cx.theme().colors().editor_invisible,
2129 background_color: None,
2130 underline: None,
2131 }],
2132 )
2133 .unwrap();
2134 let space_invisible = cx
2135 .text_system()
2136 .shape_line(
2137 "•".into(),
2138 invisible_symbol_font_size,
2139 &[TextRun {
2140 len: "•".len(),
2141 font: self.style.text.font(),
2142 color: cx.theme().colors().editor_invisible,
2143 background_color: None,
2144 underline: None,
2145 }],
2146 )
2147 .unwrap();
2148
2149 LayoutState {
2150 mode: snapshot.mode,
2151 position_map: Arc::new(PositionMap {
2152 size: bounds.size,
2153 scroll_position: point(
2154 scroll_position.x * em_width,
2155 scroll_position.y * line_height,
2156 ),
2157 scroll_max,
2158 line_layouts,
2159 line_height,
2160 em_width,
2161 em_advance,
2162 snapshot,
2163 }),
2164 visible_anchor_range: start_anchor..end_anchor,
2165 visible_display_row_range: start_row..end_row,
2166 wrap_guides,
2167 gutter_size,
2168 gutter_padding,
2169 text_size,
2170 scrollbar_row_range,
2171 show_scrollbars,
2172 is_singleton,
2173 max_row,
2174 gutter_margin,
2175 active_rows,
2176 highlighted_rows,
2177 highlighted_ranges,
2178 line_numbers,
2179 display_hunks,
2180 blocks,
2181 selections,
2182 context_menu,
2183 code_actions_indicator,
2184 fold_indicators,
2185 tab_invisible,
2186 space_invisible,
2187 hover_popovers: hover,
2188 }
2189 })
2190 }
2191
2192 #[allow(clippy::too_many_arguments)]
2193 fn layout_blocks(
2194 &self,
2195 rows: Range<u32>,
2196 snapshot: &EditorSnapshot,
2197 editor_width: Pixels,
2198 scroll_width: Pixels,
2199 gutter_padding: Pixels,
2200 gutter_width: Pixels,
2201 em_width: Pixels,
2202 text_x: Pixels,
2203 line_height: Pixels,
2204 style: &EditorStyle,
2205 line_layouts: &[LineWithInvisibles],
2206 editor: &mut Editor,
2207 cx: &mut ViewContext<Editor>,
2208 ) -> (Pixels, Vec<BlockLayout>) {
2209 let mut block_id = 0;
2210 let (fixed_blocks, non_fixed_blocks) = snapshot
2211 .blocks_in_range(rows.clone())
2212 .partition::<Vec<_>, _>(|(_, block)| match block {
2213 TransformBlock::ExcerptHeader { .. } => false,
2214 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2215 });
2216
2217 let render_block = |block: &TransformBlock,
2218 available_space: Size<AvailableSpace>,
2219 block_id: usize,
2220 editor: &mut Editor,
2221 cx: &mut ViewContext<Editor>| {
2222 let mut element = match block {
2223 TransformBlock::Custom(block) => {
2224 let align_to = block
2225 .position()
2226 .to_point(&snapshot.buffer_snapshot)
2227 .to_display_point(snapshot);
2228 let anchor_x = text_x
2229 + if rows.contains(&align_to.row()) {
2230 line_layouts[(align_to.row() - rows.start) as usize]
2231 .line
2232 .x_for_index(align_to.column() as usize)
2233 } else {
2234 layout_line(align_to.row(), snapshot, style, cx)
2235 .unwrap()
2236 .x_for_index(align_to.column() as usize)
2237 };
2238
2239 block.render(&mut BlockContext {
2240 view_context: cx,
2241 anchor_x,
2242 gutter_padding,
2243 line_height,
2244 gutter_width,
2245 em_width,
2246 block_id,
2247 editor_style: &self.style,
2248 })
2249 }
2250
2251 TransformBlock::ExcerptHeader {
2252 buffer,
2253 range,
2254 starts_new_buffer,
2255 ..
2256 } => {
2257 let include_root = editor
2258 .project
2259 .as_ref()
2260 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2261 .unwrap_or_default();
2262
2263 let jump_handler = project::File::from_dyn(buffer.file()).map(|file| {
2264 let jump_path = ProjectPath {
2265 worktree_id: file.worktree_id(cx),
2266 path: file.path.clone(),
2267 };
2268 let jump_anchor = range
2269 .primary
2270 .as_ref()
2271 .map_or(range.context.start, |primary| primary.start);
2272 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2273
2274 let jump_handler = cx.listener_for(&self.editor, move |editor, _, cx| {
2275 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2276 });
2277
2278 jump_handler
2279 });
2280
2281 let element = if *starts_new_buffer {
2282 let path = buffer.resolve_file_path(cx, include_root);
2283 let mut filename = None;
2284 let mut parent_path = None;
2285 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2286 if let Some(path) = path {
2287 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2288 parent_path = path
2289 .parent()
2290 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2291 }
2292
2293 div().id("path header container").size_full().p_1p5().child(
2294 h_stack()
2295 .id("path header block")
2296 .py_1p5()
2297 .pl_3()
2298 .pr_2()
2299 .rounded_lg()
2300 .shadow_md()
2301 .border()
2302 .border_color(cx.theme().colors().border)
2303 .bg(cx.theme().colors().editor_subheader_background)
2304 .justify_between()
2305 .cursor_pointer()
2306 .hover(|style| style.bg(cx.theme().colors().element_hover))
2307 .child(
2308 h_stack().gap_3().child(
2309 h_stack()
2310 .gap_2()
2311 .child(Label::new(
2312 filename
2313 .map(SharedString::from)
2314 .unwrap_or_else(|| "untitled".into()),
2315 ))
2316 .when_some(parent_path, |then, path| {
2317 then.child(Label::new(path).color(Color::Muted))
2318 }),
2319 ),
2320 )
2321 .children(jump_handler.map(|jump_handler| {
2322 IconButton::new(block_id, Icon::ArrowUpRight)
2323 .style(ButtonStyle::Subtle)
2324 .on_click(jump_handler)
2325 .tooltip(|cx| {
2326 Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx)
2327 })
2328 })), // .p_x(gutter_padding)
2329 )
2330 } else {
2331 h_stack()
2332 .id("collapsed context")
2333 .size_full()
2334 .gap(gutter_padding)
2335 .child(
2336 h_stack()
2337 .justify_end()
2338 .flex_none()
2339 .w(gutter_width - gutter_padding)
2340 .h_full()
2341 .text_buffer(cx)
2342 .text_color(cx.theme().colors().editor_line_number)
2343 .child("..."),
2344 )
2345 .map(|this| {
2346 if let Some(jump_handler) = jump_handler {
2347 this.child(
2348 ButtonLike::new("jump to collapsed context")
2349 .style(ButtonStyle::Transparent)
2350 .full_width()
2351 .on_click(jump_handler)
2352 .tooltip(|cx| {
2353 Tooltip::for_action(
2354 "Jump to Buffer",
2355 &OpenExcerpts,
2356 cx,
2357 )
2358 })
2359 .child(
2360 div()
2361 .h_px()
2362 .w_full()
2363 .bg(cx.theme().colors().border_variant)
2364 .group_hover("", |style| {
2365 style.bg(cx.theme().colors().border)
2366 }),
2367 ),
2368 )
2369 } else {
2370 this.child(div().size_full().bg(gpui::green()))
2371 }
2372 })
2373 // .child("⋯")
2374 // .children(jump_icon) // .p_x(gutter_padding)
2375 };
2376 element.into_any()
2377 }
2378 };
2379
2380 let size = element.measure(available_space, cx);
2381 (element, size)
2382 };
2383
2384 let mut fixed_block_max_width = Pixels::ZERO;
2385 let mut blocks = Vec::new();
2386 for (row, block) in fixed_blocks {
2387 let available_space = size(
2388 AvailableSpace::MinContent,
2389 AvailableSpace::Definite(block.height() as f32 * line_height),
2390 );
2391 let (element, element_size) =
2392 render_block(block, available_space, block_id, editor, cx);
2393 block_id += 1;
2394 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2395 blocks.push(BlockLayout {
2396 row,
2397 element,
2398 available_space,
2399 style: BlockStyle::Fixed,
2400 });
2401 }
2402 for (row, block) in non_fixed_blocks {
2403 let style = match block {
2404 TransformBlock::Custom(block) => block.style(),
2405 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2406 };
2407 let width = match style {
2408 BlockStyle::Sticky => editor_width,
2409 BlockStyle::Flex => editor_width
2410 .max(fixed_block_max_width)
2411 .max(gutter_width + scroll_width),
2412 BlockStyle::Fixed => unreachable!(),
2413 };
2414 let available_space = size(
2415 AvailableSpace::Definite(width),
2416 AvailableSpace::Definite(block.height() as f32 * line_height),
2417 );
2418 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2419 block_id += 1;
2420 blocks.push(BlockLayout {
2421 row,
2422 element,
2423 available_space,
2424 style,
2425 });
2426 }
2427 (
2428 scroll_width.max(fixed_block_max_width - gutter_width),
2429 blocks,
2430 )
2431 }
2432
2433 fn paint_mouse_listeners(
2434 &mut self,
2435 bounds: Bounds<Pixels>,
2436 gutter_bounds: Bounds<Pixels>,
2437 text_bounds: Bounds<Pixels>,
2438 layout: &LayoutState,
2439 cx: &mut WindowContext,
2440 ) {
2441 let interactive_bounds = InteractiveBounds {
2442 bounds: bounds.intersect(&cx.content_mask().bounds),
2443 stacking_order: cx.stacking_order().clone(),
2444 };
2445
2446 cx.on_mouse_event({
2447 let position_map = layout.position_map.clone();
2448 let editor = self.editor.clone();
2449 let interactive_bounds = interactive_bounds.clone();
2450
2451 move |event: &ScrollWheelEvent, phase, cx| {
2452 if phase == DispatchPhase::Bubble
2453 && interactive_bounds.visibly_contains(&event.position, cx)
2454 {
2455 editor.update(cx, |editor, cx| {
2456 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2457 });
2458 }
2459 }
2460 });
2461
2462 cx.on_mouse_event({
2463 let position_map = layout.position_map.clone();
2464 let editor = self.editor.clone();
2465 let stacking_order = cx.stacking_order().clone();
2466 let interactive_bounds = interactive_bounds.clone();
2467
2468 move |event: &MouseDownEvent, phase, cx| {
2469 if phase == DispatchPhase::Bubble
2470 && interactive_bounds.visibly_contains(&event.position, cx)
2471 {
2472 match event.button {
2473 MouseButton::Left => editor.update(cx, |editor, cx| {
2474 Self::mouse_left_down(
2475 editor,
2476 event,
2477 &position_map,
2478 text_bounds,
2479 gutter_bounds,
2480 &stacking_order,
2481 cx,
2482 );
2483 }),
2484 MouseButton::Right => editor.update(cx, |editor, cx| {
2485 Self::mouse_right_down(editor, event, &position_map, text_bounds, cx);
2486 }),
2487 _ => {}
2488 };
2489 }
2490 }
2491 });
2492
2493 cx.on_mouse_event({
2494 let position_map = layout.position_map.clone();
2495 let editor = self.editor.clone();
2496 let stacking_order = cx.stacking_order().clone();
2497 let interactive_bounds = interactive_bounds.clone();
2498
2499 move |event: &MouseUpEvent, phase, cx| {
2500 if phase == DispatchPhase::Bubble
2501 && interactive_bounds.visibly_contains(&event.position, cx)
2502 {
2503 editor.update(cx, |editor, cx| {
2504 Self::mouse_up(
2505 editor,
2506 event,
2507 &position_map,
2508 text_bounds,
2509 &stacking_order,
2510 cx,
2511 )
2512 });
2513 }
2514 }
2515 });
2516 cx.on_mouse_event({
2517 let position_map = layout.position_map.clone();
2518 let editor = self.editor.clone();
2519 let stacking_order = cx.stacking_order().clone();
2520
2521 move |event: &MouseMoveEvent, phase, cx| {
2522 // if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
2523
2524 if phase == DispatchPhase::Bubble {
2525 editor.update(cx, |editor, cx| {
2526 if event.pressed_button == Some(MouseButton::Left) {
2527 Self::mouse_dragged(
2528 editor,
2529 event,
2530 &position_map,
2531 text_bounds,
2532 gutter_bounds,
2533 &stacking_order,
2534 cx,
2535 )
2536 }
2537
2538 if interactive_bounds.visibly_contains(&event.position, cx) {
2539 Self::mouse_moved(
2540 editor,
2541 event,
2542 &position_map,
2543 text_bounds,
2544 gutter_bounds,
2545 &stacking_order,
2546 cx,
2547 )
2548 }
2549 });
2550 }
2551 }
2552 });
2553 }
2554}
2555
2556#[derive(Debug)]
2557pub struct LineWithInvisibles {
2558 pub line: ShapedLine,
2559 invisibles: Vec<Invisible>,
2560}
2561
2562impl LineWithInvisibles {
2563 fn from_chunks<'a>(
2564 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2565 text_style: &TextStyle,
2566 max_line_len: usize,
2567 max_line_count: usize,
2568 line_number_layouts: &[Option<ShapedLine>],
2569 editor_mode: EditorMode,
2570 cx: &WindowContext,
2571 ) -> Vec<Self> {
2572 let mut layouts = Vec::with_capacity(max_line_count);
2573 let mut line = String::new();
2574 let mut invisibles = Vec::new();
2575 let mut styles = Vec::new();
2576 let mut non_whitespace_added = false;
2577 let mut row = 0;
2578 let mut line_exceeded_max_len = false;
2579 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2580
2581 for highlighted_chunk in chunks.chain([HighlightedChunk {
2582 chunk: "\n",
2583 style: None,
2584 is_tab: false,
2585 }]) {
2586 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2587 if ix > 0 {
2588 let shaped_line = cx
2589 .text_system()
2590 .shape_line(line.clone().into(), font_size, &styles)
2591 .unwrap();
2592 layouts.push(Self {
2593 line: shaped_line,
2594 invisibles: invisibles.drain(..).collect(),
2595 });
2596
2597 line.clear();
2598 styles.clear();
2599 row += 1;
2600 line_exceeded_max_len = false;
2601 non_whitespace_added = false;
2602 if row == max_line_count {
2603 return layouts;
2604 }
2605 }
2606
2607 if !line_chunk.is_empty() && !line_exceeded_max_len {
2608 let text_style = if let Some(style) = highlighted_chunk.style {
2609 Cow::Owned(text_style.clone().highlight(style))
2610 } else {
2611 Cow::Borrowed(text_style)
2612 };
2613
2614 if line.len() + line_chunk.len() > max_line_len {
2615 let mut chunk_len = max_line_len - line.len();
2616 while !line_chunk.is_char_boundary(chunk_len) {
2617 chunk_len -= 1;
2618 }
2619 line_chunk = &line_chunk[..chunk_len];
2620 line_exceeded_max_len = true;
2621 }
2622
2623 styles.push(TextRun {
2624 len: line_chunk.len(),
2625 font: text_style.font(),
2626 color: text_style.color,
2627 background_color: text_style.background_color,
2628 underline: text_style.underline,
2629 });
2630
2631 if editor_mode == EditorMode::Full {
2632 // Line wrap pads its contents with fake whitespaces,
2633 // avoid printing them
2634 let inside_wrapped_string = line_number_layouts
2635 .get(row)
2636 .and_then(|layout| layout.as_ref())
2637 .is_none();
2638 if highlighted_chunk.is_tab {
2639 if non_whitespace_added || !inside_wrapped_string {
2640 invisibles.push(Invisible::Tab {
2641 line_start_offset: line.len(),
2642 });
2643 }
2644 } else {
2645 invisibles.extend(
2646 line_chunk
2647 .chars()
2648 .enumerate()
2649 .filter(|(_, line_char)| {
2650 let is_whitespace = line_char.is_whitespace();
2651 non_whitespace_added |= !is_whitespace;
2652 is_whitespace
2653 && (non_whitespace_added || !inside_wrapped_string)
2654 })
2655 .map(|(whitespace_index, _)| Invisible::Whitespace {
2656 line_offset: line.len() + whitespace_index,
2657 }),
2658 )
2659 }
2660 }
2661
2662 line.push_str(line_chunk);
2663 }
2664 }
2665 }
2666
2667 layouts
2668 }
2669
2670 fn draw(
2671 &self,
2672 layout: &LayoutState,
2673 row: u32,
2674 content_origin: gpui::Point<Pixels>,
2675 whitespace_setting: ShowWhitespaceSetting,
2676 selection_ranges: &[Range<DisplayPoint>],
2677 cx: &mut WindowContext,
2678 ) {
2679 let line_height = layout.position_map.line_height;
2680 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2681
2682 self.line.paint(
2683 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2684 line_height,
2685 cx,
2686 );
2687
2688 self.draw_invisibles(
2689 &selection_ranges,
2690 layout,
2691 content_origin,
2692 line_y,
2693 row,
2694 line_height,
2695 whitespace_setting,
2696 cx,
2697 );
2698 }
2699
2700 fn draw_invisibles(
2701 &self,
2702 selection_ranges: &[Range<DisplayPoint>],
2703 layout: &LayoutState,
2704 content_origin: gpui::Point<Pixels>,
2705 line_y: Pixels,
2706 row: u32,
2707 line_height: Pixels,
2708 whitespace_setting: ShowWhitespaceSetting,
2709 cx: &mut WindowContext,
2710 ) {
2711 let allowed_invisibles_regions = match whitespace_setting {
2712 ShowWhitespaceSetting::None => return,
2713 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2714 ShowWhitespaceSetting::All => None,
2715 };
2716
2717 for invisible in &self.invisibles {
2718 let (&token_offset, invisible_symbol) = match invisible {
2719 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2720 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2721 };
2722
2723 let x_offset = self.line.x_for_index(token_offset);
2724 let invisible_offset =
2725 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2726 let origin = content_origin
2727 + gpui::point(
2728 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2729 line_y,
2730 );
2731
2732 if let Some(allowed_regions) = allowed_invisibles_regions {
2733 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2734 if !allowed_regions
2735 .iter()
2736 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2737 {
2738 continue;
2739 }
2740 }
2741 invisible_symbol.paint(origin, line_height, cx);
2742 }
2743 }
2744}
2745
2746#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2747enum Invisible {
2748 Tab { line_start_offset: usize },
2749 Whitespace { line_offset: usize },
2750}
2751
2752impl Element for EditorElement {
2753 type State = ();
2754
2755 fn layout(
2756 &mut self,
2757 _element_state: Option<Self::State>,
2758 cx: &mut gpui::WindowContext,
2759 ) -> (gpui::LayoutId, Self::State) {
2760 self.editor.update(cx, |editor, cx| {
2761 editor.set_style(self.style.clone(), cx);
2762
2763 let layout_id = match editor.mode {
2764 EditorMode::SingleLine => {
2765 let rem_size = cx.rem_size();
2766 let mut style = Style::default();
2767 style.size.width = relative(1.).into();
2768 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2769 cx.request_layout(&style, None)
2770 }
2771 EditorMode::AutoHeight { max_lines } => {
2772 let editor_handle = cx.view().clone();
2773 let max_line_number_width =
2774 self.max_line_number_width(&editor.snapshot(cx), cx);
2775 cx.request_measured_layout(Style::default(), move |known_dimensions, _, cx| {
2776 editor_handle
2777 .update(cx, |editor, cx| {
2778 compute_auto_height_layout(
2779 editor,
2780 max_lines,
2781 max_line_number_width,
2782 known_dimensions,
2783 cx,
2784 )
2785 })
2786 .unwrap_or_default()
2787 })
2788 }
2789 EditorMode::Full => {
2790 let mut style = Style::default();
2791 style.size.width = relative(1.).into();
2792 style.size.height = relative(1.).into();
2793 cx.request_layout(&style, None)
2794 }
2795 };
2796
2797 (layout_id, ())
2798 })
2799 }
2800
2801 fn paint(
2802 &mut self,
2803 bounds: Bounds<gpui::Pixels>,
2804 _element_state: &mut Self::State,
2805 cx: &mut gpui::WindowContext,
2806 ) {
2807 let editor = self.editor.clone();
2808
2809 let mut layout = self.compute_layout(bounds, cx);
2810 let gutter_bounds = Bounds {
2811 origin: bounds.origin,
2812 size: layout.gutter_size,
2813 };
2814 let text_bounds = Bounds {
2815 origin: gutter_bounds.upper_right(),
2816 size: layout.text_size,
2817 };
2818
2819 let focus_handle = editor.focus_handle(cx);
2820 let key_context = self.editor.read(cx).key_context(cx);
2821 cx.with_key_dispatch(Some(key_context), Some(focus_handle.clone()), |_, cx| {
2822 self.register_actions(cx);
2823 self.register_key_listeners(cx);
2824
2825 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2826 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2827 cx.handle_input(&focus_handle, input_handler);
2828
2829 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2830 if layout.gutter_size.width > Pixels::ZERO {
2831 self.paint_gutter(gutter_bounds, &mut layout, cx);
2832 }
2833 self.paint_text(text_bounds, &mut layout, cx);
2834
2835 cx.with_z_index(0, |cx| {
2836 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2837
2838 if !layout.blocks.is_empty() {
2839 cx.with_element_id(Some("editor_blocks"), |cx| {
2840 self.paint_blocks(bounds, &mut layout, cx);
2841 });
2842 }
2843 });
2844
2845 cx.with_z_index(1, |cx| self.paint_scrollbar(bounds, &mut layout, cx));
2846
2847 cx.with_z_index(2, |cx| {
2848 self.paint_overlays(text_bounds, &mut layout, cx);
2849 });
2850 });
2851 })
2852 }
2853}
2854
2855impl IntoElement for EditorElement {
2856 type Element = Self;
2857
2858 fn element_id(&self) -> Option<gpui::ElementId> {
2859 self.editor.element_id()
2860 }
2861
2862 fn into_element(self) -> Self::Element {
2863 self
2864 }
2865}
2866
2867type BufferRow = u32;
2868
2869pub struct LayoutState {
2870 position_map: Arc<PositionMap>,
2871 gutter_size: Size<Pixels>,
2872 gutter_padding: Pixels,
2873 gutter_margin: Pixels,
2874 text_size: gpui::Size<Pixels>,
2875 mode: EditorMode,
2876 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
2877 visible_anchor_range: Range<Anchor>,
2878 visible_display_row_range: Range<u32>,
2879 active_rows: BTreeMap<u32, bool>,
2880 highlighted_rows: Option<Range<u32>>,
2881 line_numbers: Vec<Option<ShapedLine>>,
2882 display_hunks: Vec<DisplayDiffHunk>,
2883 blocks: Vec<BlockLayout>,
2884 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
2885 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
2886 scrollbar_row_range: Range<f32>,
2887 show_scrollbars: bool,
2888 is_singleton: bool,
2889 max_row: u32,
2890 context_menu: Option<(DisplayPoint, AnyElement)>,
2891 code_actions_indicator: Option<CodeActionsIndicator>,
2892 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
2893 fold_indicators: Vec<Option<IconButton>>,
2894 tab_invisible: ShapedLine,
2895 space_invisible: ShapedLine,
2896}
2897
2898struct CodeActionsIndicator {
2899 row: u32,
2900 button: IconButton,
2901}
2902
2903struct PositionMap {
2904 size: Size<Pixels>,
2905 line_height: Pixels,
2906 scroll_position: gpui::Point<Pixels>,
2907 scroll_max: gpui::Point<f32>,
2908 em_width: Pixels,
2909 em_advance: Pixels,
2910 line_layouts: Vec<LineWithInvisibles>,
2911 snapshot: EditorSnapshot,
2912}
2913
2914#[derive(Debug, Copy, Clone)]
2915pub struct PointForPosition {
2916 pub previous_valid: DisplayPoint,
2917 pub next_valid: DisplayPoint,
2918 pub exact_unclipped: DisplayPoint,
2919 pub column_overshoot_after_line_end: u32,
2920}
2921
2922impl PointForPosition {
2923 #[cfg(test)]
2924 pub fn valid(valid: DisplayPoint) -> Self {
2925 Self {
2926 previous_valid: valid,
2927 next_valid: valid,
2928 exact_unclipped: valid,
2929 column_overshoot_after_line_end: 0,
2930 }
2931 }
2932
2933 pub fn as_valid(&self) -> Option<DisplayPoint> {
2934 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
2935 Some(self.previous_valid)
2936 } else {
2937 None
2938 }
2939 }
2940}
2941
2942impl PositionMap {
2943 fn point_for_position(
2944 &self,
2945 text_bounds: Bounds<Pixels>,
2946 position: gpui::Point<Pixels>,
2947 ) -> PointForPosition {
2948 let scroll_position = self.snapshot.scroll_position();
2949 let position = position - text_bounds.origin;
2950 let y = position.y.max(px(0.)).min(self.size.height);
2951 let x = position.x + (scroll_position.x * self.em_width);
2952 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
2953
2954 let (column, x_overshoot_after_line_end) = if let Some(line) = self
2955 .line_layouts
2956 .get(row as usize - scroll_position.y as usize)
2957 .map(|&LineWithInvisibles { ref line, .. }| line)
2958 {
2959 if let Some(ix) = line.index_for_x(x) {
2960 (ix as u32, px(0.))
2961 } else {
2962 (line.len as u32, px(0.).max(x - line.width))
2963 }
2964 } else {
2965 (0, x)
2966 };
2967
2968 let mut exact_unclipped = DisplayPoint::new(row, column);
2969 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
2970 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
2971
2972 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
2973 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
2974 PointForPosition {
2975 previous_valid,
2976 next_valid,
2977 exact_unclipped,
2978 column_overshoot_after_line_end,
2979 }
2980 }
2981}
2982
2983struct BlockLayout {
2984 row: u32,
2985 element: AnyElement,
2986 available_space: Size<AvailableSpace>,
2987 style: BlockStyle,
2988}
2989
2990fn layout_line(
2991 row: u32,
2992 snapshot: &EditorSnapshot,
2993 style: &EditorStyle,
2994 cx: &WindowContext,
2995) -> Result<ShapedLine> {
2996 let mut line = snapshot.line(row);
2997
2998 if line.len() > MAX_LINE_LEN {
2999 let mut len = MAX_LINE_LEN;
3000 while !line.is_char_boundary(len) {
3001 len -= 1;
3002 }
3003
3004 line.truncate(len);
3005 }
3006
3007 cx.text_system().shape_line(
3008 line.into(),
3009 style.text.font_size.to_pixels(cx.rem_size()),
3010 &[TextRun {
3011 len: snapshot.line_len(row) as usize,
3012 font: style.text.font(),
3013 color: Hsla::default(),
3014 background_color: None,
3015 underline: None,
3016 }],
3017 )
3018}
3019
3020#[derive(Debug)]
3021pub struct Cursor {
3022 origin: gpui::Point<Pixels>,
3023 block_width: Pixels,
3024 line_height: Pixels,
3025 color: Hsla,
3026 shape: CursorShape,
3027 block_text: Option<ShapedLine>,
3028}
3029
3030impl Cursor {
3031 pub fn new(
3032 origin: gpui::Point<Pixels>,
3033 block_width: Pixels,
3034 line_height: Pixels,
3035 color: Hsla,
3036 shape: CursorShape,
3037 block_text: Option<ShapedLine>,
3038 ) -> Cursor {
3039 Cursor {
3040 origin,
3041 block_width,
3042 line_height,
3043 color,
3044 shape,
3045 block_text,
3046 }
3047 }
3048
3049 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3050 Bounds {
3051 origin: self.origin + origin,
3052 size: size(self.block_width, self.line_height),
3053 }
3054 }
3055
3056 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3057 let bounds = match self.shape {
3058 CursorShape::Bar => Bounds {
3059 origin: self.origin + origin,
3060 size: size(px(2.0), self.line_height),
3061 },
3062 CursorShape::Block | CursorShape::Hollow => Bounds {
3063 origin: self.origin + origin,
3064 size: size(self.block_width, self.line_height),
3065 },
3066 CursorShape::Underscore => Bounds {
3067 origin: self.origin
3068 + origin
3069 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3070 size: size(self.block_width, px(2.0)),
3071 },
3072 };
3073
3074 //Draw background or border quad
3075 let cursor = if matches!(self.shape, CursorShape::Hollow) {
3076 outline(bounds, self.color)
3077 } else {
3078 fill(bounds, self.color)
3079 };
3080
3081 cx.paint_quad(cursor);
3082
3083 if let Some(block_text) = &self.block_text {
3084 block_text.paint(self.origin + origin, self.line_height, cx);
3085 }
3086 }
3087
3088 pub fn shape(&self) -> CursorShape {
3089 self.shape
3090 }
3091}
3092
3093#[derive(Debug)]
3094pub struct HighlightedRange {
3095 pub start_y: Pixels,
3096 pub line_height: Pixels,
3097 pub lines: Vec<HighlightedRangeLine>,
3098 pub color: Hsla,
3099 pub corner_radius: Pixels,
3100}
3101
3102#[derive(Debug)]
3103pub struct HighlightedRangeLine {
3104 pub start_x: Pixels,
3105 pub end_x: Pixels,
3106}
3107
3108impl HighlightedRange {
3109 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3110 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3111 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3112 self.paint_lines(
3113 self.start_y + self.line_height,
3114 &self.lines[1..],
3115 bounds,
3116 cx,
3117 );
3118 } else {
3119 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3120 }
3121 }
3122
3123 fn paint_lines(
3124 &self,
3125 start_y: Pixels,
3126 lines: &[HighlightedRangeLine],
3127 _bounds: Bounds<Pixels>,
3128 cx: &mut WindowContext,
3129 ) {
3130 if lines.is_empty() {
3131 return;
3132 }
3133
3134 let first_line = lines.first().unwrap();
3135 let last_line = lines.last().unwrap();
3136
3137 let first_top_left = point(first_line.start_x, start_y);
3138 let first_top_right = point(first_line.end_x, start_y);
3139
3140 let curve_height = point(Pixels::ZERO, self.corner_radius);
3141 let curve_width = |start_x: Pixels, end_x: Pixels| {
3142 let max = (end_x - start_x) / 2.;
3143 let width = if max < self.corner_radius {
3144 max
3145 } else {
3146 self.corner_radius
3147 };
3148
3149 point(width, Pixels::ZERO)
3150 };
3151
3152 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3153 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3154 path.curve_to(first_top_right + curve_height, first_top_right);
3155
3156 let mut iter = lines.iter().enumerate().peekable();
3157 while let Some((ix, line)) = iter.next() {
3158 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3159
3160 if let Some((_, next_line)) = iter.peek() {
3161 let next_top_right = point(next_line.end_x, bottom_right.y);
3162
3163 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3164 Ordering::Equal => {
3165 path.line_to(bottom_right);
3166 }
3167 Ordering::Less => {
3168 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3169 path.line_to(bottom_right - curve_height);
3170 if self.corner_radius > Pixels::ZERO {
3171 path.curve_to(bottom_right - curve_width, bottom_right);
3172 }
3173 path.line_to(next_top_right + curve_width);
3174 if self.corner_radius > Pixels::ZERO {
3175 path.curve_to(next_top_right + curve_height, next_top_right);
3176 }
3177 }
3178 Ordering::Greater => {
3179 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3180 path.line_to(bottom_right - curve_height);
3181 if self.corner_radius > Pixels::ZERO {
3182 path.curve_to(bottom_right + curve_width, bottom_right);
3183 }
3184 path.line_to(next_top_right - curve_width);
3185 if self.corner_radius > Pixels::ZERO {
3186 path.curve_to(next_top_right + curve_height, next_top_right);
3187 }
3188 }
3189 }
3190 } else {
3191 let curve_width = curve_width(line.start_x, line.end_x);
3192 path.line_to(bottom_right - curve_height);
3193 if self.corner_radius > Pixels::ZERO {
3194 path.curve_to(bottom_right - curve_width, bottom_right);
3195 }
3196
3197 let bottom_left = point(line.start_x, bottom_right.y);
3198 path.line_to(bottom_left + curve_width);
3199 if self.corner_radius > Pixels::ZERO {
3200 path.curve_to(bottom_left - curve_height, bottom_left);
3201 }
3202 }
3203 }
3204
3205 if first_line.start_x > last_line.start_x {
3206 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3207 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3208 path.line_to(second_top_left + curve_height);
3209 if self.corner_radius > Pixels::ZERO {
3210 path.curve_to(second_top_left + curve_width, second_top_left);
3211 }
3212 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3213 path.line_to(first_bottom_left - curve_width);
3214 if self.corner_radius > Pixels::ZERO {
3215 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3216 }
3217 }
3218
3219 path.line_to(first_top_left + curve_height);
3220 if self.corner_radius > Pixels::ZERO {
3221 path.curve_to(first_top_left + top_curve_width, first_top_left);
3222 }
3223 path.line_to(first_top_right - top_curve_width);
3224
3225 cx.paint_path(path, self.color);
3226 }
3227}
3228
3229pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3230 (delta.pow(1.5) / 100.0).into()
3231}
3232
3233fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3234 (delta.pow(1.2) / 300.0).into()
3235}
3236
3237#[cfg(test)]
3238mod tests {
3239 use super::*;
3240 use crate::{
3241 display_map::{BlockDisposition, BlockProperties},
3242 editor_tests::{init_test, update_test_language_settings},
3243 Editor, MultiBuffer,
3244 };
3245 use gpui::{EmptyView, TestAppContext};
3246 use language::language_settings;
3247 use log::info;
3248 use std::{num::NonZeroU32, sync::Arc};
3249 use util::test::sample_text;
3250
3251 #[gpui::test]
3252 fn test_shape_line_numbers(cx: &mut TestAppContext) {
3253 init_test(cx, |_| {});
3254 let window = cx.add_window(|cx| {
3255 let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3256 Editor::new(EditorMode::Full, buffer, None, cx)
3257 });
3258
3259 let editor = window.root(cx).unwrap();
3260 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3261 let element = EditorElement::new(&editor, style);
3262
3263 let layouts = window
3264 .update(cx, |editor, cx| {
3265 let snapshot = editor.snapshot(cx);
3266 element
3267 .shape_line_numbers(
3268 0..6,
3269 &Default::default(),
3270 DisplayPoint::new(0, 0),
3271 false,
3272 &snapshot,
3273 cx,
3274 )
3275 .0
3276 })
3277 .unwrap();
3278 assert_eq!(layouts.len(), 6);
3279
3280 let relative_rows = window
3281 .update(cx, |editor, cx| {
3282 let snapshot = editor.snapshot(cx);
3283 element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3284 })
3285 .unwrap();
3286 assert_eq!(relative_rows[&0], 3);
3287 assert_eq!(relative_rows[&1], 2);
3288 assert_eq!(relative_rows[&2], 1);
3289 // current line has no relative number
3290 assert_eq!(relative_rows[&4], 1);
3291 assert_eq!(relative_rows[&5], 2);
3292
3293 // works if cursor is before screen
3294 let relative_rows = window
3295 .update(cx, |editor, cx| {
3296 let snapshot = editor.snapshot(cx);
3297
3298 element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3299 })
3300 .unwrap();
3301 assert_eq!(relative_rows.len(), 3);
3302 assert_eq!(relative_rows[&3], 2);
3303 assert_eq!(relative_rows[&4], 3);
3304 assert_eq!(relative_rows[&5], 4);
3305
3306 // works if cursor is after screen
3307 let relative_rows = window
3308 .update(cx, |editor, cx| {
3309 let snapshot = editor.snapshot(cx);
3310
3311 element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3312 })
3313 .unwrap();
3314 assert_eq!(relative_rows.len(), 3);
3315 assert_eq!(relative_rows[&0], 5);
3316 assert_eq!(relative_rows[&1], 4);
3317 assert_eq!(relative_rows[&2], 3);
3318 }
3319
3320 #[gpui::test]
3321 async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3322 init_test(cx, |_| {});
3323
3324 let window = cx.add_window(|cx| {
3325 let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3326 Editor::new(EditorMode::Full, buffer, None, cx)
3327 });
3328 let editor = window.root(cx).unwrap();
3329 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3330 let mut element = EditorElement::new(&editor, style);
3331
3332 window
3333 .update(cx, |editor, cx| {
3334 editor.cursor_shape = CursorShape::Block;
3335 editor.change_selections(None, cx, |s| {
3336 s.select_ranges([
3337 Point::new(0, 0)..Point::new(1, 0),
3338 Point::new(3, 2)..Point::new(3, 3),
3339 Point::new(5, 6)..Point::new(6, 0),
3340 ]);
3341 });
3342 })
3343 .unwrap();
3344 let state = cx
3345 .update_window(window.into(), |_, cx| {
3346 element.compute_layout(
3347 Bounds {
3348 origin: point(px(500.), px(500.)),
3349 size: size(px(500.), px(500.)),
3350 },
3351 cx,
3352 )
3353 })
3354 .unwrap();
3355
3356 assert_eq!(state.selections.len(), 1);
3357 let local_selections = &state.selections[0].1;
3358 assert_eq!(local_selections.len(), 3);
3359 // moves cursor back one line
3360 assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3361 assert_eq!(
3362 local_selections[0].range,
3363 DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3364 );
3365
3366 // moves cursor back one column
3367 assert_eq!(
3368 local_selections[1].range,
3369 DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3370 );
3371 assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3372
3373 // leaves cursor on the max point
3374 assert_eq!(
3375 local_selections[2].range,
3376 DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3377 );
3378 assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3379
3380 // active lines does not include 1 (even though the range of the selection does)
3381 assert_eq!(
3382 state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3383 vec![0, 3, 5, 6]
3384 );
3385
3386 // multi-buffer support
3387 // in DisplayPoint co-ordinates, this is what we're dealing with:
3388 // 0: [[file
3389 // 1: header]]
3390 // 2: aaaaaa
3391 // 3: bbbbbb
3392 // 4: cccccc
3393 // 5:
3394 // 6: ...
3395 // 7: ffffff
3396 // 8: gggggg
3397 // 9: hhhhhh
3398 // 10:
3399 // 11: [[file
3400 // 12: header]]
3401 // 13: bbbbbb
3402 // 14: cccccc
3403 // 15: dddddd
3404 let window = cx.add_window(|cx| {
3405 let buffer = MultiBuffer::build_multi(
3406 [
3407 (
3408 &(sample_text(8, 6, 'a') + "\n"),
3409 vec![
3410 Point::new(0, 0)..Point::new(3, 0),
3411 Point::new(4, 0)..Point::new(7, 0),
3412 ],
3413 ),
3414 (
3415 &(sample_text(8, 6, 'a') + "\n"),
3416 vec![Point::new(1, 0)..Point::new(3, 0)],
3417 ),
3418 ],
3419 cx,
3420 );
3421 Editor::new(EditorMode::Full, buffer, None, cx)
3422 });
3423 let editor = window.root(cx).unwrap();
3424 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3425 let mut element = EditorElement::new(&editor, style);
3426 let state = window.update(cx, |editor, cx| {
3427 editor.cursor_shape = CursorShape::Block;
3428 editor.change_selections(None, cx, |s| {
3429 s.select_display_ranges([
3430 DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3431 DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3432 ]);
3433 });
3434 });
3435
3436 let state = cx
3437 .update_window(window.into(), |_, cx| {
3438 element.compute_layout(
3439 Bounds {
3440 origin: point(px(500.), px(500.)),
3441 size: size(px(500.), px(500.)),
3442 },
3443 cx,
3444 )
3445 })
3446 .unwrap();
3447 assert_eq!(state.selections.len(), 1);
3448 let local_selections = &state.selections[0].1;
3449 assert_eq!(local_selections.len(), 2);
3450
3451 // moves cursor on excerpt boundary back a line
3452 // and doesn't allow selection to bleed through
3453 assert_eq!(
3454 local_selections[0].range,
3455 DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3456 );
3457 assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3458 // moves cursor on buffer boundary back two lines
3459 // and doesn't allow selection to bleed through
3460 assert_eq!(
3461 local_selections[1].range,
3462 DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3463 );
3464 assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3465 }
3466
3467 #[gpui::test]
3468 fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3469 init_test(cx, |_| {});
3470
3471 let window = cx.add_window(|cx| {
3472 let buffer = MultiBuffer::build_simple("", cx);
3473 Editor::new(EditorMode::Full, buffer, None, cx)
3474 });
3475 let editor = window.root(cx).unwrap();
3476 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3477 window
3478 .update(cx, |editor, cx| {
3479 editor.set_placeholder_text("hello", cx);
3480 editor.insert_blocks(
3481 [BlockProperties {
3482 style: BlockStyle::Fixed,
3483 disposition: BlockDisposition::Above,
3484 height: 3,
3485 position: Anchor::min(),
3486 render: Arc::new(|_| div().into_any()),
3487 }],
3488 None,
3489 cx,
3490 );
3491
3492 // Blur the editor so that it displays placeholder text.
3493 cx.blur();
3494 })
3495 .unwrap();
3496
3497 let mut element = EditorElement::new(&editor, style);
3498 let mut state = cx
3499 .update_window(window.into(), |_, cx| {
3500 element.compute_layout(
3501 Bounds {
3502 origin: point(px(500.), px(500.)),
3503 size: size(px(500.), px(500.)),
3504 },
3505 cx,
3506 )
3507 })
3508 .unwrap();
3509 let size = state.position_map.size;
3510
3511 assert_eq!(state.position_map.line_layouts.len(), 4);
3512 assert_eq!(
3513 state
3514 .line_numbers
3515 .iter()
3516 .map(Option::is_some)
3517 .collect::<Vec<_>>(),
3518 &[false, false, false, true]
3519 );
3520
3521 // Don't panic.
3522 let bounds = Bounds::<Pixels>::new(Default::default(), size);
3523 cx.update_window(window.into(), |_, cx| {
3524 element.paint(bounds, &mut (), cx);
3525 })
3526 .unwrap()
3527 }
3528
3529 #[gpui::test]
3530 fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3531 const TAB_SIZE: u32 = 4;
3532
3533 let input_text = "\t \t|\t| a b";
3534 let expected_invisibles = vec![
3535 Invisible::Tab {
3536 line_start_offset: 0,
3537 },
3538 Invisible::Whitespace {
3539 line_offset: TAB_SIZE as usize,
3540 },
3541 Invisible::Tab {
3542 line_start_offset: TAB_SIZE as usize + 1,
3543 },
3544 Invisible::Tab {
3545 line_start_offset: TAB_SIZE as usize * 2 + 1,
3546 },
3547 Invisible::Whitespace {
3548 line_offset: TAB_SIZE as usize * 3 + 1,
3549 },
3550 Invisible::Whitespace {
3551 line_offset: TAB_SIZE as usize * 3 + 3,
3552 },
3553 ];
3554 assert_eq!(
3555 expected_invisibles.len(),
3556 input_text
3557 .chars()
3558 .filter(|initial_char| initial_char.is_whitespace())
3559 .count(),
3560 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3561 );
3562
3563 init_test(cx, |s| {
3564 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3565 s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3566 });
3567
3568 let actual_invisibles =
3569 collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, px(500.0));
3570
3571 assert_eq!(expected_invisibles, actual_invisibles);
3572 }
3573
3574 #[gpui::test]
3575 fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3576 init_test(cx, |s| {
3577 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3578 s.defaults.tab_size = NonZeroU32::new(4);
3579 });
3580
3581 for editor_mode_without_invisibles in [
3582 EditorMode::SingleLine,
3583 EditorMode::AutoHeight { max_lines: 100 },
3584 ] {
3585 let invisibles = collect_invisibles_from_new_editor(
3586 cx,
3587 editor_mode_without_invisibles,
3588 "\t\t\t| | a b",
3589 px(500.0),
3590 );
3591 assert!(invisibles.is_empty(),
3592 "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
3593 }
3594 }
3595
3596 #[gpui::test]
3597 fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
3598 let tab_size = 4;
3599 let input_text = "a\tbcd ".repeat(9);
3600 let repeated_invisibles = [
3601 Invisible::Tab {
3602 line_start_offset: 1,
3603 },
3604 Invisible::Whitespace {
3605 line_offset: tab_size as usize + 3,
3606 },
3607 Invisible::Whitespace {
3608 line_offset: tab_size as usize + 4,
3609 },
3610 Invisible::Whitespace {
3611 line_offset: tab_size as usize + 5,
3612 },
3613 ];
3614 let expected_invisibles = std::iter::once(repeated_invisibles)
3615 .cycle()
3616 .take(9)
3617 .flatten()
3618 .collect::<Vec<_>>();
3619 assert_eq!(
3620 expected_invisibles.len(),
3621 input_text
3622 .chars()
3623 .filter(|initial_char| initial_char.is_whitespace())
3624 .count(),
3625 "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3626 );
3627 info!("Expected invisibles: {expected_invisibles:?}");
3628
3629 init_test(cx, |_| {});
3630
3631 // Put the same string with repeating whitespace pattern into editors of various size,
3632 // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
3633 let resize_step = 10.0;
3634 let mut editor_width = 200.0;
3635 while editor_width <= 1000.0 {
3636 update_test_language_settings(cx, |s| {
3637 s.defaults.tab_size = NonZeroU32::new(tab_size);
3638 s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3639 s.defaults.preferred_line_length = Some(editor_width as u32);
3640 s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
3641 });
3642
3643 let actual_invisibles = collect_invisibles_from_new_editor(
3644 cx,
3645 EditorMode::Full,
3646 &input_text,
3647 px(editor_width),
3648 );
3649
3650 // Whatever the editor size is, ensure it has the same invisible kinds in the same order
3651 // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
3652 let mut i = 0;
3653 for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
3654 i = actual_index;
3655 match expected_invisibles.get(i) {
3656 Some(expected_invisible) => match (expected_invisible, actual_invisible) {
3657 (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
3658 | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
3659 _ => {
3660 panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
3661 }
3662 },
3663 None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
3664 }
3665 }
3666 let missing_expected_invisibles = &expected_invisibles[i + 1..];
3667 assert!(
3668 missing_expected_invisibles.is_empty(),
3669 "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
3670 );
3671
3672 editor_width += resize_step;
3673 }
3674 }
3675
3676 fn collect_invisibles_from_new_editor(
3677 cx: &mut TestAppContext,
3678 editor_mode: EditorMode,
3679 input_text: &str,
3680 editor_width: Pixels,
3681 ) -> Vec<Invisible> {
3682 info!(
3683 "Creating editor with mode {editor_mode:?}, width {}px and text '{input_text}'",
3684 editor_width.0
3685 );
3686 let window = cx.add_window(|cx| {
3687 let buffer = MultiBuffer::build_simple(&input_text, cx);
3688 Editor::new(editor_mode, buffer, None, cx)
3689 });
3690 let editor = window.root(cx).unwrap();
3691 let style = cx.update(|cx| editor.read(cx).style().unwrap().clone());
3692 let mut element = EditorElement::new(&editor, style);
3693 window
3694 .update(cx, |editor, cx| {
3695 editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
3696 editor.set_wrap_width(Some(editor_width), cx);
3697 })
3698 .unwrap();
3699 let layout_state = cx
3700 .update_window(window.into(), |_, cx| {
3701 element.compute_layout(
3702 Bounds {
3703 origin: point(px(500.), px(500.)),
3704 size: size(px(500.), px(500.)),
3705 },
3706 cx,
3707 )
3708 })
3709 .unwrap();
3710
3711 layout_state
3712 .position_map
3713 .line_layouts
3714 .iter()
3715 .map(|line_with_invisibles| &line_with_invisibles.invisibles)
3716 .flatten()
3717 .cloned()
3718 .collect()
3719 }
3720}
3721
3722pub fn register_action<T: Action>(
3723 view: &View<Editor>,
3724 cx: &mut WindowContext,
3725 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
3726) {
3727 let view = view.clone();
3728 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
3729 let action = action.downcast_ref().unwrap();
3730 if phase == DispatchPhase::Bubble {
3731 view.update(cx, |editor, cx| {
3732 listener(editor, action, cx);
3733 })
3734 }
3735 })
3736}
3737
3738fn compute_auto_height_layout(
3739 editor: &mut Editor,
3740 max_lines: usize,
3741 max_line_number_width: Pixels,
3742 known_dimensions: Size<Option<Pixels>>,
3743 cx: &mut ViewContext<Editor>,
3744) -> Option<Size<Pixels>> {
3745 let width = known_dimensions.width?;
3746 if let Some(height) = known_dimensions.height {
3747 return Some(size(width, height));
3748 }
3749
3750 let style = editor.style.as_ref().unwrap();
3751 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
3752 let font_size = style.text.font_size.to_pixels(cx.rem_size());
3753 let line_height = style.text.line_height_in_pixels(cx.rem_size());
3754 let em_width = cx
3755 .text_system()
3756 .typographic_bounds(font_id, font_size, 'm')
3757 .unwrap()
3758 .size
3759 .width;
3760
3761 let mut snapshot = editor.snapshot(cx);
3762 let gutter_padding;
3763 let gutter_width;
3764 let gutter_margin;
3765 if snapshot.show_gutter {
3766 let descent = cx.text_system().descent(font_id, font_size);
3767 let gutter_padding_factor = 3.5;
3768 gutter_padding = (em_width * gutter_padding_factor).round();
3769 gutter_width = max_line_number_width + gutter_padding * 2.0;
3770 gutter_margin = -descent;
3771 } else {
3772 gutter_padding = Pixels::ZERO;
3773 gutter_width = Pixels::ZERO;
3774 gutter_margin = Pixels::ZERO;
3775 };
3776
3777 editor.gutter_width = gutter_width;
3778 let text_width = width - gutter_width;
3779 let overscroll = size(em_width, px(0.));
3780
3781 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
3782 if editor.set_wrap_width(Some(editor_width), cx) {
3783 snapshot = editor.snapshot(cx);
3784 }
3785
3786 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
3787 let height = scroll_height
3788 .max(line_height)
3789 .min(line_height * max_lines as f32);
3790
3791 Some(size(width, height))
3792}