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