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, update_go_to_definition_link,
13 update_inlay_link_and_hover_points, GoToDefinitionTrigger,
14 },
15 scroll::scroll_amount::ScrollAmount,
16 CursorShape, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle,
17 HalfPageDown, HalfPageUp, LineDown, LineUp, MoveDown, OpenExcerpts, PageDown, PageUp, Point,
18 SelectPhase, Selection, SoftWrap, ToPoint, MAX_LINE_LEN,
19};
20use anyhow::Result;
21use collections::{BTreeMap, HashMap};
22use gpui::{
23 div, point, px, relative, size, transparent_black, Action, AnyElement, AsyncWindowContext,
24 AvailableSpace, BorrowWindow, Bounds, ContentMask, Corners, DispatchPhase, Edges, Element,
25 ElementId, ElementInputHandler, Entity, EntityId, Hsla, InteractiveBounds, InteractiveElement,
26 IntoElement, LineLayout, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent,
27 ParentElement, Pixels, RenderOnce, ScrollWheelEvent, ShapedLine, SharedString, Size,
28 StackingOrder, StatefulInteractiveElement, Style, Styled, TextRun, TextStyle, View,
29 ViewContext, WeakView, WindowContext, WrappedLine,
30};
31use itertools::Itertools;
32use language::language_settings::ShowWhitespaceSetting;
33use multi_buffer::Anchor;
34use project::{
35 project_settings::{GitGutterSetting, ProjectSettings},
36 ProjectPath,
37};
38use settings::Settings;
39use smallvec::SmallVec;
40use std::{
41 any::TypeId,
42 borrow::Cow,
43 cmp::{self, Ordering},
44 fmt::Write,
45 iter,
46 ops::Range,
47 sync::Arc,
48};
49use sum_tree::Bias;
50use theme::{ActiveTheme, PlayerColor};
51use ui::prelude::*;
52use ui::{h_stack, IconButton, Tooltip};
53use util::ResultExt;
54use workspace::item::Item;
55
56enum FoldMarkers {}
57
58struct SelectionLayout {
59 head: DisplayPoint,
60 cursor_shape: CursorShape,
61 is_newest: bool,
62 is_local: bool,
63 range: Range<DisplayPoint>,
64 active_rows: Range<u32>,
65}
66
67impl SelectionLayout {
68 fn new<T: ToPoint + ToDisplayPoint + Clone>(
69 selection: Selection<T>,
70 line_mode: bool,
71 cursor_shape: CursorShape,
72 map: &DisplaySnapshot,
73 is_newest: bool,
74 is_local: bool,
75 ) -> Self {
76 let point_selection = selection.map(|p| p.to_point(&map.buffer_snapshot));
77 let display_selection = point_selection.map(|p| p.to_display_point(map));
78 let mut range = display_selection.range();
79 let mut head = display_selection.head();
80 let mut active_rows = map.prev_line_boundary(point_selection.start).1.row()
81 ..map.next_line_boundary(point_selection.end).1.row();
82
83 // vim visual line mode
84 if line_mode {
85 let point_range = map.expand_to_line(point_selection.range());
86 range = point_range.start.to_display_point(map)..point_range.end.to_display_point(map);
87 }
88
89 // any vim visual mode (including line mode)
90 if cursor_shape == CursorShape::Block && !range.is_empty() && !selection.reversed {
91 if head.column() > 0 {
92 head = map.clip_point(DisplayPoint::new(head.row(), head.column() - 1), Bias::Left)
93 } else if head.row() > 0 && head != map.max_point() {
94 head = map.clip_point(
95 DisplayPoint::new(head.row() - 1, map.line_len(head.row() - 1)),
96 Bias::Left,
97 );
98 // updating range.end is a no-op unless you're cursor is
99 // on the newline containing a multi-buffer divider
100 // in which case the clip_point may have moved the head up
101 // an additional row.
102 range.end = DisplayPoint::new(head.row() + 1, 0);
103 active_rows.end = head.row();
104 }
105 }
106
107 Self {
108 head,
109 cursor_shape,
110 is_newest,
111 is_local,
112 range,
113 active_rows,
114 }
115 }
116}
117
118pub struct EditorElement {
119 editor: View<Editor>,
120 style: EditorStyle,
121}
122
123impl EditorElement {
124 pub fn new(editor: &View<Editor>, style: EditorStyle) -> Self {
125 Self {
126 editor: editor.clone(),
127 style,
128 }
129 }
130
131 fn register_actions(&self, cx: &mut WindowContext) {
132 let view = &self.editor;
133 self.editor.update(cx, |editor, cx| {
134 for action in editor.editor_actions.iter() {
135 (action)(cx)
136 }
137 });
138 register_action(view, cx, Editor::move_left);
139 register_action(view, cx, Editor::move_right);
140 register_action(view, cx, Editor::move_down);
141 register_action(view, cx, Editor::move_up);
142 // on_action(cx, Editor::new_file); todo!()
143 // on_action(cx, Editor::new_file_in_direction); todo!()
144 register_action(view, cx, Editor::cancel);
145 register_action(view, cx, Editor::newline);
146 register_action(view, cx, Editor::newline_above);
147 register_action(view, cx, Editor::newline_below);
148 register_action(view, cx, Editor::backspace);
149 register_action(view, cx, Editor::delete);
150 register_action(view, cx, Editor::tab);
151 register_action(view, cx, Editor::tab_prev);
152 register_action(view, cx, Editor::indent);
153 register_action(view, cx, Editor::outdent);
154 register_action(view, cx, Editor::delete_line);
155 register_action(view, cx, Editor::join_lines);
156 register_action(view, cx, Editor::sort_lines_case_sensitive);
157 register_action(view, cx, Editor::sort_lines_case_insensitive);
158 register_action(view, cx, Editor::reverse_lines);
159 register_action(view, cx, Editor::shuffle_lines);
160 register_action(view, cx, Editor::convert_to_upper_case);
161 register_action(view, cx, Editor::convert_to_lower_case);
162 register_action(view, cx, Editor::convert_to_title_case);
163 register_action(view, cx, Editor::convert_to_snake_case);
164 register_action(view, cx, Editor::convert_to_kebab_case);
165 register_action(view, cx, Editor::convert_to_upper_camel_case);
166 register_action(view, cx, Editor::convert_to_lower_camel_case);
167 register_action(view, cx, Editor::delete_to_previous_word_start);
168 register_action(view, cx, Editor::delete_to_previous_subword_start);
169 register_action(view, cx, Editor::delete_to_next_word_end);
170 register_action(view, cx, Editor::delete_to_next_subword_end);
171 register_action(view, cx, Editor::delete_to_beginning_of_line);
172 register_action(view, cx, Editor::delete_to_end_of_line);
173 register_action(view, cx, Editor::cut_to_end_of_line);
174 register_action(view, cx, Editor::duplicate_line);
175 register_action(view, cx, Editor::move_line_up);
176 register_action(view, cx, Editor::move_line_down);
177 register_action(view, cx, Editor::transpose);
178 register_action(view, cx, Editor::cut);
179 register_action(view, cx, Editor::copy);
180 register_action(view, cx, Editor::paste);
181 register_action(view, cx, Editor::undo);
182 register_action(view, cx, Editor::redo);
183 register_action(view, cx, Editor::move_page_up);
184 register_action(view, cx, Editor::move_page_down);
185 register_action(view, cx, Editor::next_screen);
186 register_action(view, cx, Editor::scroll_cursor_top);
187 register_action(view, cx, Editor::scroll_cursor_center);
188 register_action(view, cx, Editor::scroll_cursor_bottom);
189 register_action(view, cx, |editor, _: &LineDown, cx| {
190 editor.scroll_screen(&ScrollAmount::Line(1.), cx)
191 });
192 register_action(view, cx, |editor, _: &LineUp, cx| {
193 editor.scroll_screen(&ScrollAmount::Line(-1.), cx)
194 });
195 register_action(view, cx, |editor, _: &HalfPageDown, cx| {
196 editor.scroll_screen(&ScrollAmount::Page(0.5), cx)
197 });
198 register_action(view, cx, |editor, _: &HalfPageUp, cx| {
199 editor.scroll_screen(&ScrollAmount::Page(-0.5), cx)
200 });
201 register_action(view, cx, |editor, _: &PageDown, cx| {
202 editor.scroll_screen(&ScrollAmount::Page(1.), cx)
203 });
204 register_action(view, cx, |editor, _: &PageUp, cx| {
205 editor.scroll_screen(&ScrollAmount::Page(-1.), cx)
206 });
207 register_action(view, cx, Editor::move_to_previous_word_start);
208 register_action(view, cx, Editor::move_to_previous_subword_start);
209 register_action(view, cx, Editor::move_to_next_word_end);
210 register_action(view, cx, Editor::move_to_next_subword_end);
211 register_action(view, cx, Editor::move_to_beginning_of_line);
212 register_action(view, cx, Editor::move_to_end_of_line);
213 register_action(view, cx, Editor::move_to_start_of_paragraph);
214 register_action(view, cx, Editor::move_to_end_of_paragraph);
215 register_action(view, cx, Editor::move_to_beginning);
216 register_action(view, cx, Editor::move_to_end);
217 register_action(view, cx, Editor::select_up);
218 register_action(view, cx, Editor::select_down);
219 register_action(view, cx, Editor::select_left);
220 register_action(view, cx, Editor::select_right);
221 register_action(view, cx, Editor::select_to_previous_word_start);
222 register_action(view, cx, Editor::select_to_previous_subword_start);
223 register_action(view, cx, Editor::select_to_next_word_end);
224 register_action(view, cx, Editor::select_to_next_subword_end);
225 register_action(view, cx, Editor::select_to_beginning_of_line);
226 register_action(view, cx, Editor::select_to_end_of_line);
227 register_action(view, cx, Editor::select_to_start_of_paragraph);
228 register_action(view, cx, Editor::select_to_end_of_paragraph);
229 register_action(view, cx, Editor::select_to_beginning);
230 register_action(view, cx, Editor::select_to_end);
231 register_action(view, cx, Editor::select_all);
232 register_action(view, cx, |editor, action, cx| {
233 editor.select_all_matches(action, cx).log_err();
234 });
235 register_action(view, cx, Editor::select_line);
236 register_action(view, cx, Editor::split_selection_into_lines);
237 register_action(view, cx, Editor::add_selection_above);
238 register_action(view, cx, Editor::add_selection_below);
239 register_action(view, cx, |editor, action, cx| {
240 editor.select_next(action, cx).log_err();
241 });
242 register_action(view, cx, |editor, action, cx| {
243 editor.select_previous(action, cx).log_err();
244 });
245 register_action(view, cx, Editor::toggle_comments);
246 register_action(view, cx, Editor::select_larger_syntax_node);
247 register_action(view, cx, Editor::select_smaller_syntax_node);
248 register_action(view, cx, Editor::move_to_enclosing_bracket);
249 register_action(view, cx, Editor::undo_selection);
250 register_action(view, cx, Editor::redo_selection);
251 register_action(view, cx, Editor::go_to_diagnostic);
252 register_action(view, cx, Editor::go_to_prev_diagnostic);
253 register_action(view, cx, Editor::go_to_hunk);
254 register_action(view, cx, Editor::go_to_prev_hunk);
255 register_action(view, cx, Editor::go_to_definition);
256 register_action(view, cx, Editor::go_to_definition_split);
257 register_action(view, cx, Editor::go_to_type_definition);
258 register_action(view, cx, Editor::go_to_type_definition_split);
259 register_action(view, cx, Editor::fold);
260 register_action(view, cx, Editor::fold_at);
261 register_action(view, cx, Editor::unfold_lines);
262 register_action(view, cx, Editor::unfold_at);
263 register_action(view, cx, Editor::fold_selected_ranges);
264 register_action(view, cx, Editor::show_completions);
265 register_action(view, cx, Editor::toggle_code_actions);
266 // on_action(cx, Editor::open_excerpts); todo!()
267 register_action(view, cx, Editor::toggle_soft_wrap);
268 register_action(view, cx, Editor::toggle_inlay_hints);
269 register_action(view, cx, hover_popover::hover);
270 register_action(view, cx, Editor::reveal_in_finder);
271 register_action(view, cx, Editor::copy_path);
272 register_action(view, cx, Editor::copy_relative_path);
273 register_action(view, cx, Editor::copy_highlight_json);
274 register_action(view, cx, |editor, action, cx| {
275 editor
276 .format(action, cx)
277 .map(|task| task.detach_and_log_err(cx));
278 });
279 register_action(view, cx, Editor::restart_language_server);
280 register_action(view, cx, Editor::show_character_palette);
281 register_action(view, cx, |editor, action, cx| {
282 editor
283 .confirm_completion(action, cx)
284 .map(|task| task.detach_and_log_err(cx));
285 });
286 register_action(view, cx, |editor, action, cx| {
287 editor
288 .confirm_code_action(action, cx)
289 .map(|task| task.detach_and_log_err(cx));
290 });
291 register_action(view, cx, |editor, action, cx| {
292 editor
293 .rename(action, cx)
294 .map(|task| task.detach_and_log_err(cx));
295 });
296 register_action(view, cx, |editor, action, cx| {
297 editor
298 .confirm_rename(action, cx)
299 .map(|task| task.detach_and_log_err(cx));
300 });
301 register_action(view, cx, |editor, action, cx| {
302 editor
303 .find_all_references(action, cx)
304 .map(|task| task.detach_and_log_err(cx));
305 });
306 register_action(view, cx, Editor::next_copilot_suggestion);
307 register_action(view, cx, Editor::previous_copilot_suggestion);
308 register_action(view, cx, Editor::copilot_suggest);
309 register_action(view, cx, Editor::context_menu_first);
310 register_action(view, cx, Editor::context_menu_prev);
311 register_action(view, cx, Editor::context_menu_next);
312 register_action(view, cx, Editor::context_menu_last);
313 }
314
315 fn mouse_down(
316 editor: &mut Editor,
317 event: &MouseDownEvent,
318 position_map: &PositionMap,
319 text_bounds: Bounds<Pixels>,
320 gutter_bounds: Bounds<Pixels>,
321 stacking_order: &StackingOrder,
322 cx: &mut ViewContext<Editor>,
323 ) -> bool {
324 let mut click_count = event.click_count;
325 let modifiers = event.modifiers;
326
327 if gutter_bounds.contains_point(&event.position) {
328 click_count = 3; // Simulate triple-click when clicking the gutter to select lines
329 } else if !text_bounds.contains_point(&event.position) {
330 return false;
331 }
332 if !cx.was_top_layer(&event.position, stacking_order) {
333 return false;
334 }
335
336 let point_for_position = position_map.point_for_position(text_bounds, event.position);
337 let position = point_for_position.previous_valid;
338 if modifiers.shift && modifiers.alt {
339 editor.select(
340 SelectPhase::BeginColumnar {
341 position,
342 goal_column: point_for_position.exact_unclipped.column(),
343 },
344 cx,
345 );
346 } else if modifiers.shift && !modifiers.control && !modifiers.alt && !modifiers.command {
347 editor.select(
348 SelectPhase::Extend {
349 position,
350 click_count,
351 },
352 cx,
353 );
354 } else {
355 editor.select(
356 SelectPhase::Begin {
357 position,
358 add: modifiers.alt,
359 click_count,
360 },
361 cx,
362 );
363 }
364
365 true
366 }
367
368 // fn mouse_right_down(
369 // editor: &mut Editor,
370 // position: gpui::Point<Pixels>,
371 // position_map: &PositionMap,
372 // text_bounds: Bounds<Pixels>,
373 // cx: &mut EventContext<Editor>,
374 // ) -> bool {
375 // if !text_bounds.contains_point(position) {
376 // return false;
377 // }
378 // let point_for_position = position_map.point_for_position(text_bounds, position);
379 // mouse_context_menu::deploy_context_menu(
380 // editor,
381 // position,
382 // point_for_position.previous_valid,
383 // cx,
384 // );
385 // true
386 // }
387
388 fn mouse_up(
389 editor: &mut Editor,
390 event: &MouseUpEvent,
391 position_map: &PositionMap,
392 text_bounds: Bounds<Pixels>,
393 stacking_order: &StackingOrder,
394 cx: &mut ViewContext<Editor>,
395 ) -> bool {
396 let end_selection = editor.has_pending_selection();
397 let pending_nonempty_selections = editor.has_pending_nonempty_selection();
398
399 if end_selection {
400 editor.select(SelectPhase::End, cx);
401 }
402
403 if !pending_nonempty_selections
404 && event.modifiers.command
405 && text_bounds.contains_point(&event.position)
406 && cx.was_top_layer(&event.position, stacking_order)
407 {
408 let point = position_map.point_for_position(text_bounds, event.position);
409 let could_be_inlay = point.as_valid().is_none();
410 let split = event.modifiers.alt;
411 if event.modifiers.shift || could_be_inlay {
412 go_to_fetched_type_definition(editor, point, split, cx);
413 } else {
414 go_to_fetched_definition(editor, point, split, cx);
415 }
416
417 return true;
418 }
419
420 end_selection
421 }
422
423 fn mouse_moved(
424 editor: &mut Editor,
425 event: &MouseMoveEvent,
426 position_map: &PositionMap,
427 text_bounds: Bounds<Pixels>,
428 gutter_bounds: Bounds<Pixels>,
429 stacking_order: &StackingOrder,
430 cx: &mut ViewContext<Editor>,
431 ) -> bool {
432 let modifiers = event.modifiers;
433 if editor.has_pending_selection() && event.pressed_button == Some(MouseButton::Left) {
434 let point_for_position = position_map.point_for_position(text_bounds, event.position);
435 let mut scroll_delta = gpui::Point::<f32>::zero();
436 let vertical_margin = position_map.line_height.min(text_bounds.size.height / 3.0);
437 let top = text_bounds.origin.y + vertical_margin;
438 let bottom = text_bounds.lower_left().y - vertical_margin;
439 if event.position.y < top {
440 scroll_delta.y = -scale_vertical_mouse_autoscroll_delta(top - event.position.y);
441 }
442 if event.position.y > bottom {
443 scroll_delta.y = scale_vertical_mouse_autoscroll_delta(event.position.y - bottom);
444 }
445
446 let horizontal_margin = position_map.line_height.min(text_bounds.size.width / 3.0);
447 let left = text_bounds.origin.x + horizontal_margin;
448 let right = text_bounds.upper_right().x - horizontal_margin;
449 if event.position.x < left {
450 scroll_delta.x = -scale_horizontal_mouse_autoscroll_delta(left - event.position.x);
451 }
452 if event.position.x > right {
453 scroll_delta.x = scale_horizontal_mouse_autoscroll_delta(event.position.x - right);
454 }
455
456 editor.select(
457 SelectPhase::Update {
458 position: point_for_position.previous_valid,
459 goal_column: point_for_position.exact_unclipped.column(),
460 scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
461 .clamp(&gpui::Point::zero(), &position_map.scroll_max),
462 },
463 cx,
464 );
465 }
466
467 let text_hovered = text_bounds.contains_point(&event.position);
468 let gutter_hovered = gutter_bounds.contains_point(&event.position);
469 let was_top = cx.was_top_layer(&event.position, stacking_order);
470
471 editor.set_gutter_hovered(gutter_hovered, cx);
472
473 // Don't trigger hover popover if mouse is hovering over context menu
474 if text_hovered && was_top {
475 let point_for_position = position_map.point_for_position(text_bounds, event.position);
476
477 match point_for_position.as_valid() {
478 Some(point) => {
479 update_go_to_definition_link(
480 editor,
481 Some(GoToDefinitionTrigger::Text(point)),
482 modifiers.command,
483 modifiers.shift,
484 cx,
485 );
486 hover_at(editor, Some(point), cx);
487 }
488 None => {
489 update_inlay_link_and_hover_points(
490 &position_map.snapshot,
491 point_for_position,
492 editor,
493 modifiers.command,
494 modifiers.shift,
495 cx,
496 );
497 }
498 }
499
500 true
501 } else {
502 update_go_to_definition_link(editor, None, modifiers.command, modifiers.shift, cx);
503 hover_at(editor, None, cx);
504 gutter_hovered && was_top
505 }
506 }
507
508 fn scroll(
509 editor: &mut Editor,
510 event: &ScrollWheelEvent,
511 position_map: &PositionMap,
512 bounds: &InteractiveBounds,
513 cx: &mut ViewContext<Editor>,
514 ) -> bool {
515 if !bounds.visibly_contains(&event.position, cx) {
516 return false;
517 }
518
519 let line_height = position_map.line_height;
520 let max_glyph_width = position_map.em_width;
521 let (delta, axis) = match event.delta {
522 gpui::ScrollDelta::Pixels(mut pixels) => {
523 //Trackpad
524 let axis = position_map.snapshot.ongoing_scroll.filter(&mut pixels);
525 (pixels, axis)
526 }
527
528 gpui::ScrollDelta::Lines(lines) => {
529 //Not trackpad
530 let pixels = point(lines.x * max_glyph_width, lines.y * line_height);
531 (pixels, None)
532 }
533 };
534
535 let scroll_position = position_map.snapshot.scroll_position();
536 let x = f32::from((scroll_position.x * max_glyph_width - delta.x) / max_glyph_width);
537 let y = f32::from((scroll_position.y * line_height - delta.y) / line_height);
538 let scroll_position = point(x, y).clamp(&point(0., 0.), &position_map.scroll_max);
539 editor.scroll(scroll_position, axis, cx);
540
541 true
542 }
543
544 fn paint_background(
545 &self,
546 gutter_bounds: Bounds<Pixels>,
547 text_bounds: Bounds<Pixels>,
548 layout: &LayoutState,
549 cx: &mut WindowContext,
550 ) {
551 let bounds = gutter_bounds.union(&text_bounds);
552 let scroll_top =
553 layout.position_map.snapshot.scroll_position().y * layout.position_map.line_height;
554 let gutter_bg = cx.theme().colors().editor_gutter_background;
555 cx.paint_quad(
556 gutter_bounds,
557 Corners::default(),
558 gutter_bg,
559 Edges::default(),
560 transparent_black(),
561 );
562 cx.paint_quad(
563 text_bounds,
564 Corners::default(),
565 self.style.background,
566 Edges::default(),
567 transparent_black(),
568 );
569
570 if let EditorMode::Full = layout.mode {
571 let mut active_rows = layout.active_rows.iter().peekable();
572 while let Some((start_row, contains_non_empty_selection)) = active_rows.next() {
573 let mut end_row = *start_row;
574 while active_rows.peek().map_or(false, |r| {
575 *r.0 == end_row + 1 && r.1 == contains_non_empty_selection
576 }) {
577 active_rows.next().unwrap();
578 end_row += 1;
579 }
580
581 if !contains_non_empty_selection {
582 let origin = point(
583 bounds.origin.x,
584 bounds.origin.y + (layout.position_map.line_height * *start_row as f32)
585 - scroll_top,
586 );
587 let size = size(
588 bounds.size.width,
589 layout.position_map.line_height * (end_row - start_row + 1) as f32,
590 );
591 let active_line_bg = cx.theme().colors().editor_active_line_background;
592 cx.paint_quad(
593 Bounds { origin, size },
594 Corners::default(),
595 active_line_bg,
596 Edges::default(),
597 transparent_black(),
598 );
599 }
600 }
601
602 if let Some(highlighted_rows) = &layout.highlighted_rows {
603 let origin = point(
604 bounds.origin.x,
605 bounds.origin.y
606 + (layout.position_map.line_height * highlighted_rows.start as f32)
607 - scroll_top,
608 );
609 let size = size(
610 bounds.size.width,
611 layout.position_map.line_height * highlighted_rows.len() as f32,
612 );
613 let highlighted_line_bg = cx.theme().colors().editor_highlighted_line_background;
614 cx.paint_quad(
615 Bounds { origin, size },
616 Corners::default(),
617 highlighted_line_bg,
618 Edges::default(),
619 transparent_black(),
620 );
621 }
622
623 let scroll_left =
624 layout.position_map.snapshot.scroll_position().x * layout.position_map.em_width;
625
626 for (wrap_position, active) in layout.wrap_guides.iter() {
627 let x = (text_bounds.origin.x + *wrap_position + layout.position_map.em_width / 2.)
628 - scroll_left;
629
630 if x < text_bounds.origin.x
631 || (layout.show_scrollbars && x > self.scrollbar_left(&bounds))
632 {
633 continue;
634 }
635
636 let color = if *active {
637 cx.theme().colors().editor_active_wrap_guide
638 } else {
639 cx.theme().colors().editor_wrap_guide
640 };
641 cx.paint_quad(
642 Bounds {
643 origin: point(x, text_bounds.origin.y),
644 size: size(px(1.), text_bounds.size.height),
645 },
646 Corners::default(),
647 color,
648 Edges::default(),
649 transparent_black(),
650 );
651 }
652 }
653 }
654
655 fn paint_gutter(
656 &mut self,
657 bounds: Bounds<Pixels>,
658 layout: &mut LayoutState,
659 cx: &mut WindowContext,
660 ) {
661 let line_height = layout.position_map.line_height;
662
663 let scroll_position = layout.position_map.snapshot.scroll_position();
664 let scroll_top = scroll_position.y * line_height;
665
666 let show_gutter = matches!(
667 ProjectSettings::get_global(cx).git.git_gutter,
668 Some(GitGutterSetting::TrackedFiles)
669 );
670
671 if show_gutter {
672 Self::paint_diff_hunks(bounds, layout, cx);
673 }
674
675 for (ix, line) in layout.line_numbers.iter().enumerate() {
676 if let Some(line) = line {
677 let line_origin = bounds.origin
678 + point(
679 bounds.size.width - line.width - layout.gutter_padding,
680 ix as f32 * line_height - (scroll_top % line_height),
681 );
682
683 line.paint(line_origin, line_height, cx);
684 }
685 }
686
687 for (ix, fold_indicator) in layout.fold_indicators.drain(..).enumerate() {
688 if let Some(mut fold_indicator) = fold_indicator {
689 let mut fold_indicator = fold_indicator.into_any_element();
690 let available_space = size(
691 AvailableSpace::MinContent,
692 AvailableSpace::Definite(line_height * 0.55),
693 );
694 let fold_indicator_size = fold_indicator.measure(available_space, cx);
695
696 let position = point(
697 bounds.size.width - layout.gutter_padding,
698 ix as f32 * line_height - (scroll_top % line_height),
699 );
700 let centering_offset = point(
701 (layout.gutter_padding + layout.gutter_margin - fold_indicator_size.width) / 2.,
702 (line_height - fold_indicator_size.height) / 2.,
703 );
704 let origin = bounds.origin + position + centering_offset;
705 fold_indicator.draw(origin, available_space, cx);
706 }
707 }
708
709 if let Some(indicator) = layout.code_actions_indicator.take() {
710 let mut button = indicator.button.into_any_element();
711 let available_space = size(
712 AvailableSpace::MinContent,
713 AvailableSpace::Definite(line_height),
714 );
715 let indicator_size = button.measure(available_space, cx);
716
717 let mut x = Pixels::ZERO;
718 let mut y = indicator.row as f32 * line_height - scroll_top;
719 // Center indicator.
720 x += ((layout.gutter_padding + layout.gutter_margin) - indicator_size.width) / 2.;
721 y += (line_height - indicator_size.height) / 2.;
722
723 button.draw(bounds.origin + point(x, y), available_space, cx);
724 }
725 }
726
727 fn paint_diff_hunks(bounds: Bounds<Pixels>, layout: &LayoutState, cx: &mut WindowContext) {
728 // todo!()
729 // let diff_style = &theme::current(cx).editor.diff.clone();
730 // let line_height = layout.position_map.line_height;
731
732 // let scroll_position = layout.position_map.snapshot.scroll_position();
733 // let scroll_top = scroll_position.y * line_height;
734
735 // for hunk in &layout.display_hunks {
736 // let (display_row_range, status) = match hunk {
737 // //TODO: This rendering is entirely a horrible hack
738 // &DisplayDiffHunk::Folded { display_row: row } => {
739 // let start_y = row as f32 * line_height - scroll_top;
740 // let end_y = start_y + line_height;
741
742 // let width = diff_style.removed_width_em * line_height;
743 // let highlight_origin = bounds.origin + point(-width, start_y);
744 // let highlight_size = point(width * 2., end_y - start_y);
745 // let highlight_bounds = Bounds::<Pixels>::new(highlight_origin, highlight_size);
746
747 // cx.paint_quad(Quad {
748 // bounds: highlight_bounds,
749 // background: Some(diff_style.modified),
750 // border: Border::new(0., Color::transparent_black()).into(),
751 // corner_radii: (1. * line_height).into(),
752 // });
753
754 // continue;
755 // }
756
757 // DisplayDiffHunk::Unfolded {
758 // display_row_range,
759 // status,
760 // } => (display_row_range, status),
761 // };
762
763 // let color = match status {
764 // DiffHunkStatus::Added => diff_style.inserted,
765 // DiffHunkStatus::Modified => diff_style.modified,
766
767 // //TODO: This rendering is entirely a horrible hack
768 // DiffHunkStatus::Removed => {
769 // let row = display_row_range.start;
770
771 // let offset = line_height / 2.;
772 // let start_y = row as f32 * line_height - offset - scroll_top;
773 // let end_y = start_y + line_height;
774
775 // let width = diff_style.removed_width_em * line_height;
776 // let highlight_origin = bounds.origin + point(-width, start_y);
777 // let highlight_size = point(width * 2., end_y - start_y);
778 // let highlight_bounds = Bounds::<Pixels>::new(highlight_origin, highlight_size);
779
780 // cx.paint_quad(Quad {
781 // bounds: highlight_bounds,
782 // background: Some(diff_style.deleted),
783 // border: Border::new(0., Color::transparent_black()).into(),
784 // corner_radii: (1. * line_height).into(),
785 // });
786
787 // continue;
788 // }
789 // };
790
791 // let start_row = display_row_range.start;
792 // let end_row = display_row_range.end;
793
794 // let start_y = start_row as f32 * line_height - scroll_top;
795 // let end_y = end_row as f32 * line_height - scroll_top;
796
797 // let width = diff_style.width_em * line_height;
798 // let highlight_origin = bounds.origin + point(-width, start_y);
799 // let highlight_size = point(width * 2., end_y - start_y);
800 // let highlight_bounds = Bounds::<Pixels>::new(highlight_origin, highlight_size);
801
802 // cx.paint_quad(Quad {
803 // bounds: highlight_bounds,
804 // background: Some(color),
805 // border: Border::new(0., Color::transparent_black()).into(),
806 // corner_radii: (diff_style.corner_radius * line_height).into(),
807 // });
808 // }
809 }
810
811 fn paint_text(
812 &mut self,
813 text_bounds: Bounds<Pixels>,
814 layout: &mut LayoutState,
815 cx: &mut WindowContext,
816 ) {
817 let scroll_position = layout.position_map.snapshot.scroll_position();
818 let start_row = layout.visible_display_row_range.start;
819 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
820 let line_end_overshoot = 0.15 * layout.position_map.line_height;
821 let whitespace_setting = self
822 .editor
823 .read(cx)
824 .buffer
825 .read(cx)
826 .settings_at(0, cx)
827 .show_whitespaces;
828
829 cx.with_content_mask(
830 Some(ContentMask {
831 bounds: text_bounds,
832 }),
833 |cx| {
834 // todo!("cursor region")
835 // cx.scene().push_cursor_region(CursorRegion {
836 // bounds,
837 // style: if !editor.link_go_to_definition_state.definitions.is_empty {
838 // CursorStyle::PointingHand
839 // } else {
840 // CursorStyle::IBeam
841 // },
842 // });
843
844 let fold_corner_radius = 0.15 * layout.position_map.line_height;
845 cx.with_element_id(Some("folds"), |cx| {
846 let snapshot = &layout.position_map.snapshot;
847 for fold in snapshot.folds_in_range(layout.visible_anchor_range.clone()) {
848 let fold_range = fold.range.clone();
849 let display_range = fold.range.start.to_display_point(&snapshot)
850 ..fold.range.end.to_display_point(&snapshot);
851 debug_assert_eq!(display_range.start.row(), display_range.end.row());
852 let row = display_range.start.row();
853
854 let line_layout = &layout.position_map.line_layouts
855 [(row - layout.visible_display_row_range.start) as usize]
856 .line;
857 let start_x = content_origin.x
858 + line_layout.x_for_index(display_range.start.column() as usize)
859 - layout.position_map.scroll_position.x;
860 let start_y = content_origin.y
861 + row as f32 * layout.position_map.line_height
862 - layout.position_map.scroll_position.y;
863 let end_x = content_origin.x
864 + line_layout.x_for_index(display_range.end.column() as usize)
865 - layout.position_map.scroll_position.x;
866
867 let fold_bounds = Bounds {
868 origin: point(start_x, start_y),
869 size: size(end_x - start_x, layout.position_map.line_height),
870 };
871
872 let fold_background = cx.with_z_index(1, |cx| {
873 div()
874 .id(fold.id)
875 .size_full()
876 .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
877 .on_click(cx.listener_for(
878 &self.editor,
879 move |editor: &mut Editor, _, cx| {
880 editor.unfold_ranges(
881 [fold_range.start..fold_range.end],
882 true,
883 false,
884 cx,
885 );
886 cx.stop_propagation();
887 },
888 ))
889 .draw(
890 fold_bounds.origin,
891 fold_bounds.size,
892 cx,
893 |fold_element_state, cx| {
894 if fold_element_state.is_active() {
895 gpui::blue()
896 } else if fold_bounds.contains_point(&cx.mouse_position()) {
897 gpui::black()
898 } else {
899 gpui::red()
900 }
901 },
902 )
903 });
904
905 self.paint_highlighted_range(
906 display_range.clone(),
907 fold_background,
908 fold_corner_radius,
909 fold_corner_radius * 2.,
910 layout,
911 content_origin,
912 text_bounds,
913 cx,
914 );
915 }
916 });
917
918 for (range, color) in &layout.highlighted_ranges {
919 self.paint_highlighted_range(
920 range.clone(),
921 *color,
922 Pixels::ZERO,
923 line_end_overshoot,
924 layout,
925 content_origin,
926 text_bounds,
927 cx,
928 );
929 }
930
931 let mut cursors = SmallVec::<[Cursor; 32]>::new();
932 let corner_radius = 0.15 * layout.position_map.line_height;
933 let mut invisible_display_ranges = SmallVec::<[Range<DisplayPoint>; 32]>::new();
934
935 for (selection_style, selections) in &layout.selections {
936 for selection in selections {
937 self.paint_highlighted_range(
938 selection.range.clone(),
939 selection_style.selection,
940 corner_radius,
941 corner_radius * 2.,
942 layout,
943 content_origin,
944 text_bounds,
945 cx,
946 );
947
948 if selection.is_local && !selection.range.is_empty() {
949 invisible_display_ranges.push(selection.range.clone());
950 }
951
952 if !selection.is_local || self.editor.read(cx).show_local_cursors(cx) {
953 let cursor_position = selection.head;
954 if layout
955 .visible_display_row_range
956 .contains(&cursor_position.row())
957 {
958 let cursor_row_layout = &layout.position_map.line_layouts
959 [(cursor_position.row() - start_row) as usize]
960 .line;
961 let cursor_column = cursor_position.column() as usize;
962
963 let cursor_character_x =
964 cursor_row_layout.x_for_index(cursor_column);
965 let mut block_width = cursor_row_layout
966 .x_for_index(cursor_column + 1)
967 - cursor_character_x;
968 if block_width == Pixels::ZERO {
969 block_width = layout.position_map.em_width;
970 }
971 let block_text = if let CursorShape::Block = selection.cursor_shape
972 {
973 layout
974 .position_map
975 .snapshot
976 .chars_at(cursor_position)
977 .next()
978 .and_then(|(character, _)| {
979 let text = SharedString::from(character.to_string());
980 let len = text.len();
981 cx.text_system()
982 .shape_line(
983 text,
984 cursor_row_layout.font_size,
985 &[TextRun {
986 len,
987 font: self.style.text.font(),
988 color: self.style.background,
989 background_color: None,
990 underline: None,
991 }],
992 )
993 .log_err()
994 })
995 } else {
996 None
997 };
998
999 let x = cursor_character_x - layout.position_map.scroll_position.x;
1000 let y = cursor_position.row() as f32
1001 * layout.position_map.line_height
1002 - layout.position_map.scroll_position.y;
1003 if selection.is_newest {
1004 self.editor.update(cx, |editor, _| {
1005 editor.pixel_position_of_newest_cursor = Some(point(
1006 text_bounds.origin.x + x + block_width / 2.,
1007 text_bounds.origin.y
1008 + y
1009 + layout.position_map.line_height / 2.,
1010 ))
1011 });
1012 }
1013 cursors.push(Cursor {
1014 color: selection_style.cursor,
1015 block_width,
1016 origin: point(x, y),
1017 line_height: layout.position_map.line_height,
1018 shape: selection.cursor_shape,
1019 block_text,
1020 });
1021 }
1022 }
1023 }
1024 }
1025
1026 for (ix, line_with_invisibles) in
1027 layout.position_map.line_layouts.iter().enumerate()
1028 {
1029 let row = start_row + ix as u32;
1030 line_with_invisibles.draw(
1031 layout,
1032 row,
1033 content_origin,
1034 whitespace_setting,
1035 &invisible_display_ranges,
1036 cx,
1037 )
1038 }
1039
1040 cx.with_z_index(0, |cx| {
1041 for cursor in cursors {
1042 cursor.paint(content_origin, cx);
1043 }
1044 });
1045
1046 cx.with_z_index(1, |cx| {
1047 if let Some((position, mut context_menu)) = layout.context_menu.take() {
1048 let available_space =
1049 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1050 let context_menu_size = context_menu.measure(available_space, cx);
1051
1052 let cursor_row_layout = &layout.position_map.line_layouts
1053 [(position.row() - start_row) as usize]
1054 .line;
1055 let x = cursor_row_layout.x_for_index(position.column() as usize)
1056 - layout.position_map.scroll_position.x;
1057 let y = (position.row() + 1) as f32 * layout.position_map.line_height
1058 - layout.position_map.scroll_position.y;
1059 let mut list_origin = content_origin + point(x, y);
1060 let list_width = context_menu_size.width;
1061 let list_height = context_menu_size.height;
1062
1063 // Snap the right edge of the list to the right edge of the window if
1064 // its horizontal bounds overflow.
1065 if list_origin.x + list_width > cx.viewport_size().width {
1066 list_origin.x =
1067 (cx.viewport_size().width - list_width).max(Pixels::ZERO);
1068 }
1069
1070 if list_origin.y + list_height > text_bounds.lower_right().y {
1071 list_origin.y -= layout.position_map.line_height + list_height;
1072 }
1073
1074 cx.break_content_mask(|cx| {
1075 context_menu.draw(list_origin, available_space, cx)
1076 });
1077 }
1078
1079 if let Some((position, mut hover_popovers)) = layout.hover_popovers.take() {
1080 let available_space =
1081 size(AvailableSpace::MinContent, AvailableSpace::MinContent);
1082
1083 // This is safe because we check on layout whether the required row is available
1084 let hovered_row_layout = &layout.position_map.line_layouts
1085 [(position.row() - start_row) as usize]
1086 .line;
1087
1088 // Minimum required size: Take the first popover, and add 1.5 times the minimum popover
1089 // height. This is the size we will use to decide whether to render popovers above or below
1090 // the hovered line.
1091 let first_size = hover_popovers[0].measure(available_space, cx);
1092 let height_to_reserve = first_size.height
1093 + 1.5 * MIN_POPOVER_LINE_HEIGHT * layout.position_map.line_height;
1094
1095 // Compute Hovered Point
1096 let x = hovered_row_layout.x_for_index(position.column() as usize)
1097 - layout.position_map.scroll_position.x;
1098 let y = position.row() as f32 * layout.position_map.line_height
1099 - layout.position_map.scroll_position.y;
1100 let hovered_point = content_origin + point(x, y);
1101
1102 if hovered_point.y - height_to_reserve > Pixels::ZERO {
1103 // There is enough space above. Render popovers above the hovered point
1104 let mut current_y = hovered_point.y;
1105 for mut hover_popover in hover_popovers {
1106 let size = hover_popover.measure(available_space, cx);
1107 let mut popover_origin =
1108 point(hovered_point.x, current_y - size.height);
1109
1110 let x_out_of_bounds =
1111 text_bounds.upper_right().x - (popover_origin.x + size.width);
1112 if x_out_of_bounds < Pixels::ZERO {
1113 popover_origin.x = popover_origin.x + x_out_of_bounds;
1114 }
1115
1116 cx.break_content_mask(|cx| {
1117 hover_popover.draw(popover_origin, available_space, cx)
1118 });
1119
1120 current_y = popover_origin.y - HOVER_POPOVER_GAP;
1121 }
1122 } else {
1123 // There is not enough space above. Render popovers below the hovered point
1124 let mut current_y = hovered_point.y + layout.position_map.line_height;
1125 for mut hover_popover in hover_popovers {
1126 let size = hover_popover.measure(available_space, cx);
1127 let mut popover_origin = point(hovered_point.x, current_y);
1128
1129 let x_out_of_bounds =
1130 text_bounds.upper_right().x - (popover_origin.x + size.width);
1131 if x_out_of_bounds < Pixels::ZERO {
1132 popover_origin.x = popover_origin.x + x_out_of_bounds;
1133 }
1134
1135 hover_popover.draw(popover_origin, available_space, cx);
1136
1137 current_y = popover_origin.y + size.height + HOVER_POPOVER_GAP;
1138 }
1139 }
1140 }
1141 })
1142 },
1143 )
1144 }
1145
1146 fn scrollbar_left(&self, bounds: &Bounds<Pixels>) -> Pixels {
1147 bounds.upper_right().x - self.style.scrollbar_width
1148 }
1149
1150 // fn paint_scrollbar(
1151 // &mut self,
1152 // bounds: Bounds<Pixels>,
1153 // layout: &mut LayoutState,
1154 // editor: &Editor,
1155 // cx: &mut ViewContext<Editor>,
1156 // ) {
1157 // enum ScrollbarMouseHandlers {}
1158 // if layout.mode != EditorMode::Full {
1159 // return;
1160 // }
1161
1162 // let style = &self.style.theme.scrollbar;
1163
1164 // let top = bounds.min_y;
1165 // let bottom = bounds.max_y;
1166 // let right = bounds.max_x;
1167 // let left = self.scrollbar_left(&bounds);
1168 // let row_range = &layout.scrollbar_row_range;
1169 // let max_row = layout.max_row as f32 + (row_range.end - row_range.start);
1170
1171 // let mut height = bounds.height();
1172 // let mut first_row_y_offset = 0.0;
1173
1174 // // Impose a minimum height on the scrollbar thumb
1175 // let row_height = height / max_row;
1176 // let min_thumb_height =
1177 // style.min_height_factor * cx.font_cache.line_height(self.style.text.font_size);
1178 // let thumb_height = (row_range.end - row_range.start) * row_height;
1179 // if thumb_height < min_thumb_height {
1180 // first_row_y_offset = (min_thumb_height - thumb_height) / 2.0;
1181 // height -= min_thumb_height - thumb_height;
1182 // }
1183
1184 // let y_for_row = |row: f32| -> f32 { top + first_row_y_offset + row * row_height };
1185
1186 // let thumb_top = y_for_row(row_range.start) - first_row_y_offset;
1187 // let thumb_bottom = y_for_row(row_range.end) + first_row_y_offset;
1188 // let track_bounds = Bounds::<Pixels>::from_points(point(left, top), point(right, bottom));
1189 // let thumb_bounds = Bounds::<Pixels>::from_points(point(left, thumb_top), point(right, thumb_bottom));
1190
1191 // if layout.show_scrollbars {
1192 // cx.paint_quad(Quad {
1193 // bounds: track_bounds,
1194 // border: style.track.border.into(),
1195 // background: style.track.background_color,
1196 // ..Default::default()
1197 // });
1198 // let scrollbar_settings = settings::get::<EditorSettings>(cx).scrollbar;
1199 // let theme = theme::current(cx);
1200 // let scrollbar_theme = &theme.editor.scrollbar;
1201 // if layout.is_singleton && scrollbar_settings.selections {
1202 // let start_anchor = Anchor::min();
1203 // let end_anchor = Anchor::max;
1204 // let color = scrollbar_theme.selections;
1205 // let border = Border {
1206 // width: 1.,
1207 // color: style.thumb.border.color,
1208 // overlay: false,
1209 // top: false,
1210 // right: true,
1211 // bottom: false,
1212 // left: true,
1213 // };
1214 // let mut push_region = |start: DisplayPoint, end: DisplayPoint| {
1215 // let start_y = y_for_row(start.row() as f32);
1216 // let mut end_y = y_for_row(end.row() as f32);
1217 // if end_y - start_y < 1. {
1218 // end_y = start_y + 1.;
1219 // }
1220 // let bounds = Bounds::<Pixels>::from_points(point(left, start_y), point(right, end_y));
1221
1222 // cx.paint_quad(Quad {
1223 // bounds,
1224 // background: Some(color),
1225 // border: border.into(),
1226 // corner_radii: style.thumb.corner_radii.into(),
1227 // })
1228 // };
1229 // let background_ranges = editor
1230 // .background_highlight_row_ranges::<crate::items::BufferSearchHighlights>(
1231 // start_anchor..end_anchor,
1232 // &layout.position_map.snapshot,
1233 // 50000,
1234 // );
1235 // for row in background_ranges {
1236 // let start = row.start();
1237 // let end = row.end();
1238 // push_region(*start, *end);
1239 // }
1240 // }
1241
1242 // if layout.is_singleton && scrollbar_settings.git_diff {
1243 // let diff_style = scrollbar_theme.git.clone();
1244 // for hunk in layout
1245 // .position_map
1246 // .snapshot
1247 // .buffer_snapshot
1248 // .git_diff_hunks_in_range(0..(max_row.floor() as u32))
1249 // {
1250 // let start_display = Point::new(hunk.buffer_range.start, 0)
1251 // .to_display_point(&layout.position_map.snapshot.display_snapshot);
1252 // let end_display = Point::new(hunk.buffer_range.end, 0)
1253 // .to_display_point(&layout.position_map.snapshot.display_snapshot);
1254 // let start_y = y_for_row(start_display.row() as f32);
1255 // let mut end_y = if hunk.buffer_range.start == hunk.buffer_range.end {
1256 // y_for_row((end_display.row() + 1) as f32)
1257 // } else {
1258 // y_for_row((end_display.row()) as f32)
1259 // };
1260
1261 // if end_y - start_y < 1. {
1262 // end_y = start_y + 1.;
1263 // }
1264 // let bounds = Bounds::<Pixels>::from_points(point(left, start_y), point(right, end_y));
1265
1266 // let color = match hunk.status() {
1267 // DiffHunkStatus::Added => diff_style.inserted,
1268 // DiffHunkStatus::Modified => diff_style.modified,
1269 // DiffHunkStatus::Removed => diff_style.deleted,
1270 // };
1271
1272 // let border = Border {
1273 // width: 1.,
1274 // color: style.thumb.border.color,
1275 // overlay: false,
1276 // top: false,
1277 // right: true,
1278 // bottom: false,
1279 // left: true,
1280 // };
1281
1282 // cx.paint_quad(Quad {
1283 // bounds,
1284 // background: Some(color),
1285 // border: border.into(),
1286 // corner_radii: style.thumb.corner_radii.into(),
1287 // })
1288 // }
1289 // }
1290
1291 // cx.paint_quad(Quad {
1292 // bounds: thumb_bounds,
1293 // border: style.thumb.border.into(),
1294 // background: style.thumb.background_color,
1295 // corner_radii: style.thumb.corner_radii.into(),
1296 // });
1297 // }
1298
1299 // cx.scene().push_cursor_region(CursorRegion {
1300 // bounds: track_bounds,
1301 // style: CursorStyle::Arrow,
1302 // });
1303 // let region_id = cx.view_id();
1304 // cx.scene().push_mouse_region(
1305 // MouseRegion::new::<ScrollbarMouseHandlers>(region_id, region_id, track_bounds)
1306 // .on_move(move |event, editor: &mut Editor, cx| {
1307 // if event.pressed_button.is_none() {
1308 // editor.scroll_manager.show_scrollbar(cx);
1309 // }
1310 // })
1311 // .on_down(MouseButton::Left, {
1312 // let row_range = row_range.clone();
1313 // move |event, editor: &mut Editor, cx| {
1314 // let y = event.position.y;
1315 // if y < thumb_top || thumb_bottom < y {
1316 // let center_row = ((y - top) * max_row as f32 / height).round() as u32;
1317 // let top_row = center_row
1318 // .saturating_sub((row_range.end - row_range.start) as u32 / 2);
1319 // let mut position = editor.scroll_position(cx);
1320 // position.set_y(top_row as f32);
1321 // editor.set_scroll_position(position, cx);
1322 // } else {
1323 // editor.scroll_manager.show_scrollbar(cx);
1324 // }
1325 // }
1326 // })
1327 // .on_drag(MouseButton::Left, {
1328 // move |event, editor: &mut Editor, cx| {
1329 // if event.end {
1330 // return;
1331 // }
1332
1333 // let y = event.prev_mouse_position.y;
1334 // let new_y = event.position.y;
1335 // if thumb_top < y && y < thumb_bottom {
1336 // let mut position = editor.scroll_position(cx);
1337 // position.set_y(position.y + (new_y - y) * (max_row as f32) / height);
1338 // if position.y < 0.0 {
1339 // position.set_y(0.);
1340 // }
1341 // editor.set_scroll_position(position, cx);
1342 // }
1343 // }
1344 // }),
1345 // );
1346 // }
1347
1348 #[allow(clippy::too_many_arguments)]
1349 fn paint_highlighted_range(
1350 &self,
1351 range: Range<DisplayPoint>,
1352 color: Hsla,
1353 corner_radius: Pixels,
1354 line_end_overshoot: Pixels,
1355 layout: &LayoutState,
1356 content_origin: gpui::Point<Pixels>,
1357 bounds: Bounds<Pixels>,
1358 cx: &mut WindowContext,
1359 ) {
1360 let start_row = layout.visible_display_row_range.start;
1361 let end_row = layout.visible_display_row_range.end;
1362 if range.start != range.end {
1363 let row_range = if range.end.column() == 0 {
1364 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row(), end_row)
1365 } else {
1366 cmp::max(range.start.row(), start_row)..cmp::min(range.end.row() + 1, end_row)
1367 };
1368
1369 let highlighted_range = HighlightedRange {
1370 color,
1371 line_height: layout.position_map.line_height,
1372 corner_radius,
1373 start_y: content_origin.y
1374 + row_range.start as f32 * layout.position_map.line_height
1375 - layout.position_map.scroll_position.y,
1376 lines: row_range
1377 .into_iter()
1378 .map(|row| {
1379 let line_layout =
1380 &layout.position_map.line_layouts[(row - start_row) as usize].line;
1381 HighlightedRangeLine {
1382 start_x: if row == range.start.row() {
1383 content_origin.x
1384 + line_layout.x_for_index(range.start.column() as usize)
1385 - layout.position_map.scroll_position.x
1386 } else {
1387 content_origin.x - layout.position_map.scroll_position.x
1388 },
1389 end_x: if row == range.end.row() {
1390 content_origin.x
1391 + line_layout.x_for_index(range.end.column() as usize)
1392 - layout.position_map.scroll_position.x
1393 } else {
1394 content_origin.x + line_layout.width + line_end_overshoot
1395 - layout.position_map.scroll_position.x
1396 },
1397 }
1398 })
1399 .collect(),
1400 };
1401
1402 highlighted_range.paint(bounds, cx);
1403 }
1404 }
1405
1406 fn paint_blocks(
1407 &mut self,
1408 bounds: Bounds<Pixels>,
1409 layout: &mut LayoutState,
1410 cx: &mut WindowContext,
1411 ) {
1412 let scroll_position = layout.position_map.snapshot.scroll_position();
1413 let scroll_left = scroll_position.x * layout.position_map.em_width;
1414 let scroll_top = scroll_position.y * layout.position_map.line_height;
1415
1416 for block in layout.blocks.drain(..) {
1417 let mut origin = bounds.origin
1418 + point(
1419 Pixels::ZERO,
1420 block.row as f32 * layout.position_map.line_height - scroll_top,
1421 );
1422 if !matches!(block.style, BlockStyle::Sticky) {
1423 origin += point(-scroll_left, Pixels::ZERO);
1424 }
1425 block.element.draw(origin, block.available_space, cx);
1426 }
1427 }
1428
1429 fn column_pixels(&self, column: usize, cx: &WindowContext) -> Pixels {
1430 let style = &self.style;
1431 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1432 let layout = cx
1433 .text_system()
1434 .shape_line(
1435 SharedString::from(" ".repeat(column)),
1436 font_size,
1437 &[TextRun {
1438 len: column,
1439 font: style.text.font(),
1440 color: Hsla::default(),
1441 background_color: None,
1442 underline: None,
1443 }],
1444 )
1445 .unwrap();
1446
1447 layout.width
1448 }
1449
1450 fn max_line_number_width(&self, snapshot: &EditorSnapshot, cx: &WindowContext) -> Pixels {
1451 let digit_count = (snapshot.max_buffer_row() as f32 + 1.).log10().floor() as usize + 1;
1452 self.column_pixels(digit_count, cx)
1453 }
1454
1455 //Folds contained in a hunk are ignored apart from shrinking visual size
1456 //If a fold contains any hunks then that fold line is marked as modified
1457 fn layout_git_gutters(
1458 &self,
1459 display_rows: Range<u32>,
1460 snapshot: &EditorSnapshot,
1461 ) -> Vec<DisplayDiffHunk> {
1462 let buffer_snapshot = &snapshot.buffer_snapshot;
1463
1464 let buffer_start_row = DisplayPoint::new(display_rows.start, 0)
1465 .to_point(snapshot)
1466 .row;
1467 let buffer_end_row = DisplayPoint::new(display_rows.end, 0)
1468 .to_point(snapshot)
1469 .row;
1470
1471 buffer_snapshot
1472 .git_diff_hunks_in_range(buffer_start_row..buffer_end_row)
1473 .map(|hunk| diff_hunk_to_display(hunk, snapshot))
1474 .dedup()
1475 .collect()
1476 }
1477
1478 fn calculate_relative_line_numbers(
1479 &self,
1480 snapshot: &EditorSnapshot,
1481 rows: &Range<u32>,
1482 relative_to: Option<u32>,
1483 ) -> HashMap<u32, u32> {
1484 let mut relative_rows: HashMap<u32, u32> = Default::default();
1485 let Some(relative_to) = relative_to else {
1486 return relative_rows;
1487 };
1488
1489 let start = rows.start.min(relative_to);
1490 let end = rows.end.max(relative_to);
1491
1492 let buffer_rows = snapshot
1493 .buffer_rows(start)
1494 .take(1 + (end - start) as usize)
1495 .collect::<Vec<_>>();
1496
1497 let head_idx = relative_to - start;
1498 let mut delta = 1;
1499 let mut i = head_idx + 1;
1500 while i < buffer_rows.len() as u32 {
1501 if buffer_rows[i as usize].is_some() {
1502 if rows.contains(&(i + start)) {
1503 relative_rows.insert(i + start, delta);
1504 }
1505 delta += 1;
1506 }
1507 i += 1;
1508 }
1509 delta = 1;
1510 i = head_idx.min(buffer_rows.len() as u32 - 1);
1511 while i > 0 && buffer_rows[i as usize].is_none() {
1512 i -= 1;
1513 }
1514
1515 while i > 0 {
1516 i -= 1;
1517 if buffer_rows[i as usize].is_some() {
1518 if rows.contains(&(i + start)) {
1519 relative_rows.insert(i + start, delta);
1520 }
1521 delta += 1;
1522 }
1523 }
1524
1525 relative_rows
1526 }
1527
1528 fn shape_line_numbers(
1529 &self,
1530 rows: Range<u32>,
1531 active_rows: &BTreeMap<u32, bool>,
1532 newest_selection_head: DisplayPoint,
1533 is_singleton: bool,
1534 snapshot: &EditorSnapshot,
1535 cx: &ViewContext<Editor>,
1536 ) -> (
1537 Vec<Option<ShapedLine>>,
1538 Vec<Option<(FoldStatus, BufferRow, bool)>>,
1539 ) {
1540 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1541 let include_line_numbers = snapshot.mode == EditorMode::Full;
1542 let mut shaped_line_numbers = Vec::with_capacity(rows.len());
1543 let mut fold_statuses = Vec::with_capacity(rows.len());
1544 let mut line_number = String::new();
1545 let is_relative = EditorSettings::get_global(cx).relative_line_numbers;
1546 let relative_to = if is_relative {
1547 Some(newest_selection_head.row())
1548 } else {
1549 None
1550 };
1551
1552 let relative_rows = self.calculate_relative_line_numbers(&snapshot, &rows, relative_to);
1553
1554 for (ix, row) in snapshot
1555 .buffer_rows(rows.start)
1556 .take((rows.end - rows.start) as usize)
1557 .enumerate()
1558 {
1559 let display_row = rows.start + ix as u32;
1560 let (active, color) = if active_rows.contains_key(&display_row) {
1561 (true, cx.theme().colors().editor_active_line_number)
1562 } else {
1563 (false, cx.theme().colors().editor_line_number)
1564 };
1565 if let Some(buffer_row) = row {
1566 if include_line_numbers {
1567 line_number.clear();
1568 let default_number = buffer_row + 1;
1569 let number = relative_rows
1570 .get(&(ix as u32 + rows.start))
1571 .unwrap_or(&default_number);
1572 write!(&mut line_number, "{}", number).unwrap();
1573 let run = TextRun {
1574 len: line_number.len(),
1575 font: self.style.text.font(),
1576 color,
1577 background_color: None,
1578 underline: None,
1579 };
1580 let shaped_line = cx
1581 .text_system()
1582 .shape_line(line_number.clone().into(), font_size, &[run])
1583 .unwrap();
1584 shaped_line_numbers.push(Some(shaped_line));
1585 fold_statuses.push(
1586 is_singleton
1587 .then(|| {
1588 snapshot
1589 .fold_for_line(buffer_row)
1590 .map(|fold_status| (fold_status, buffer_row, active))
1591 })
1592 .flatten(),
1593 )
1594 }
1595 } else {
1596 fold_statuses.push(None);
1597 shaped_line_numbers.push(None);
1598 }
1599 }
1600
1601 (shaped_line_numbers, fold_statuses)
1602 }
1603
1604 fn layout_lines(
1605 &self,
1606 rows: Range<u32>,
1607 line_number_layouts: &[Option<ShapedLine>],
1608 snapshot: &EditorSnapshot,
1609 cx: &ViewContext<Editor>,
1610 ) -> Vec<LineWithInvisibles> {
1611 if rows.start >= rows.end {
1612 return Vec::new();
1613 }
1614
1615 // When the editor is empty and unfocused, then show the placeholder.
1616 if snapshot.is_empty() {
1617 let font_size = self.style.text.font_size.to_pixels(cx.rem_size());
1618 let placeholder_color = cx.theme().styles.colors.text_placeholder;
1619 let placeholder_text = snapshot.placeholder_text();
1620 let placeholder_lines = placeholder_text
1621 .as_ref()
1622 .map_or("", AsRef::as_ref)
1623 .split('\n')
1624 .skip(rows.start as usize)
1625 .chain(iter::repeat(""))
1626 .take(rows.len());
1627 placeholder_lines
1628 .filter_map(move |line| {
1629 let run = TextRun {
1630 len: line.len(),
1631 font: self.style.text.font(),
1632 color: placeholder_color,
1633 background_color: None,
1634 underline: Default::default(),
1635 };
1636 cx.text_system()
1637 .shape_line(line.to_string().into(), font_size, &[run])
1638 .log_err()
1639 })
1640 .map(|line| LineWithInvisibles {
1641 line,
1642 invisibles: Vec::new(),
1643 })
1644 .collect()
1645 } else {
1646 let chunks = snapshot.highlighted_chunks(rows.clone(), true, &self.style);
1647 LineWithInvisibles::from_chunks(
1648 chunks,
1649 &self.style.text,
1650 MAX_LINE_LEN,
1651 rows.len() as usize,
1652 line_number_layouts,
1653 snapshot.mode,
1654 cx,
1655 )
1656 }
1657 }
1658
1659 fn compute_layout(
1660 &mut self,
1661 mut bounds: Bounds<Pixels>,
1662 cx: &mut WindowContext,
1663 ) -> LayoutState {
1664 self.editor.update(cx, |editor, cx| {
1665 let snapshot = editor.snapshot(cx);
1666 let style = self.style.clone();
1667
1668 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
1669 let font_size = style.text.font_size.to_pixels(cx.rem_size());
1670 let line_height = style.text.line_height_in_pixels(cx.rem_size());
1671 let em_width = cx
1672 .text_system()
1673 .typographic_bounds(font_id, font_size, 'm')
1674 .unwrap()
1675 .size
1676 .width;
1677 let em_advance = cx
1678 .text_system()
1679 .advance(font_id, font_size, 'm')
1680 .unwrap()
1681 .width;
1682
1683 let gutter_padding;
1684 let gutter_width;
1685 let gutter_margin;
1686 if snapshot.show_gutter {
1687 let descent = cx.text_system().descent(font_id, font_size).unwrap();
1688
1689 let gutter_padding_factor = 3.5;
1690 gutter_padding = (em_width * gutter_padding_factor).round();
1691 gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
1692 gutter_margin = -descent;
1693 } else {
1694 gutter_padding = Pixels::ZERO;
1695 gutter_width = Pixels::ZERO;
1696 gutter_margin = Pixels::ZERO;
1697 };
1698
1699 editor.gutter_width = gutter_width;
1700
1701 let text_width = bounds.size.width - gutter_width;
1702 let overscroll = size(em_width, px(0.));
1703 let snapshot = {
1704 editor.set_visible_line_count((bounds.size.height / line_height).into(), cx);
1705
1706 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
1707 let wrap_width = match editor.soft_wrap_mode(cx) {
1708 SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
1709 SoftWrap::EditorWidth => editor_width,
1710 SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
1711 };
1712
1713 dbg!(bounds.size.width, gutter_width, gutter_margin, overscroll.width, em_width, em_advance, wrap_width);
1714 println!("setting wrap width during paint: {wrap_width:?}");
1715 if editor.set_wrap_width(Some(wrap_width), cx) {
1716 editor.snapshot(cx)
1717 } else {
1718 snapshot
1719 }
1720 };
1721
1722 let wrap_guides = editor
1723 .wrap_guides(cx)
1724 .iter()
1725 .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
1726 .collect::<SmallVec<[_; 2]>>();
1727
1728 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
1729 let gutter_size = size(gutter_width, bounds.size.height);
1730 let text_size = size(text_width, bounds.size.height);
1731
1732 let autoscroll_horizontally =
1733 editor.autoscroll_vertically(bounds.size.height, line_height, cx);
1734 let mut snapshot = editor.snapshot(cx);
1735
1736 let scroll_position = snapshot.scroll_position();
1737 // The scroll position is a fractional point, the whole number of which represents
1738 // the top of the window in terms of display rows.
1739 let start_row = scroll_position.y as u32;
1740 let height_in_lines = f32::from(bounds.size.height / line_height);
1741 let max_row = snapshot.max_point().row();
1742
1743 // Add 1 to ensure selections bleed off screen
1744 let end_row = 1 + cmp::min((scroll_position.y + height_in_lines).ceil() as u32, max_row);
1745
1746 let start_anchor = if start_row == 0 {
1747 Anchor::min()
1748 } else {
1749 snapshot
1750 .buffer_snapshot
1751 .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
1752 };
1753 let end_anchor = if end_row > max_row {
1754 Anchor::max()
1755 } else {
1756 snapshot
1757 .buffer_snapshot
1758 .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
1759 };
1760
1761 let mut selections: Vec<(PlayerColor, Vec<SelectionLayout>)> = Vec::new();
1762 let mut active_rows = BTreeMap::new();
1763 let is_singleton = editor.is_singleton(cx);
1764
1765 let highlighted_rows = editor.highlighted_rows();
1766 let highlighted_ranges = editor.background_highlights_in_range(
1767 start_anchor..end_anchor,
1768 &snapshot.display_snapshot,
1769 cx.theme().colors(),
1770 );
1771
1772 let mut newest_selection_head = None;
1773
1774 if editor.show_local_selections {
1775 let mut local_selections: Vec<Selection<Point>> = editor
1776 .selections
1777 .disjoint_in_range(start_anchor..end_anchor, cx);
1778 local_selections.extend(editor.selections.pending(cx));
1779 let mut layouts = Vec::new();
1780 let newest = editor.selections.newest(cx);
1781 for selection in local_selections.drain(..) {
1782 let is_empty = selection.start == selection.end;
1783 let is_newest = selection == newest;
1784
1785 let layout = SelectionLayout::new(
1786 selection,
1787 editor.selections.line_mode,
1788 editor.cursor_shape,
1789 &snapshot.display_snapshot,
1790 is_newest,
1791 true,
1792 );
1793 if is_newest {
1794 newest_selection_head = Some(layout.head);
1795 }
1796
1797 for row in cmp::max(layout.active_rows.start, start_row)
1798 ..=cmp::min(layout.active_rows.end, end_row)
1799 {
1800 let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
1801 *contains_non_empty_selection |= !is_empty;
1802 }
1803 layouts.push(layout);
1804 }
1805
1806 selections.push((style.local_player, layouts));
1807 }
1808
1809 if let Some(collaboration_hub) = &editor.collaboration_hub {
1810 // When following someone, render the local selections in their color.
1811 if let Some(leader_id) = editor.leader_peer_id {
1812 if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
1813 if let Some(participant_index) = collaboration_hub
1814 .user_participant_indices(cx)
1815 .get(&collaborator.user_id)
1816 {
1817 if let Some((local_selection_style, _)) = selections.first_mut() {
1818 *local_selection_style = cx
1819 .theme()
1820 .players()
1821 .color_for_participant(participant_index.0);
1822 }
1823 }
1824 }
1825 }
1826
1827 let mut remote_selections = HashMap::default();
1828 for selection in snapshot.remote_selections_in_range(
1829 &(start_anchor..end_anchor),
1830 collaboration_hub.as_ref(),
1831 cx,
1832 ) {
1833 let selection_style = if let Some(participant_index) = selection.participant_index {
1834 cx.theme()
1835 .players()
1836 .color_for_participant(participant_index.0)
1837 } else {
1838 cx.theme().players().absent()
1839 };
1840
1841 // Don't re-render the leader's selections, since the local selections
1842 // match theirs.
1843 if Some(selection.peer_id) == editor.leader_peer_id {
1844 continue;
1845 }
1846
1847 remote_selections
1848 .entry(selection.replica_id)
1849 .or_insert((selection_style, Vec::new()))
1850 .1
1851 .push(SelectionLayout::new(
1852 selection.selection,
1853 selection.line_mode,
1854 selection.cursor_shape,
1855 &snapshot.display_snapshot,
1856 false,
1857 false,
1858 ));
1859 }
1860
1861 selections.extend(remote_selections.into_values());
1862 }
1863
1864 let scrollbar_settings = EditorSettings::get_global(cx).scrollbar;
1865 let show_scrollbars = match scrollbar_settings.show {
1866 ShowScrollbar::Auto => {
1867 // Git
1868 (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
1869 ||
1870 // Selections
1871 (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty())
1872 // Scrollmanager
1873 || editor.scroll_manager.scrollbars_visible()
1874 }
1875 ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
1876 ShowScrollbar::Always => true,
1877 ShowScrollbar::Never => false,
1878 };
1879
1880 let head_for_relative = newest_selection_head.unwrap_or_else(|| {
1881 let newest = editor.selections.newest::<Point>(cx);
1882 SelectionLayout::new(
1883 newest,
1884 editor.selections.line_mode,
1885 editor.cursor_shape,
1886 &snapshot.display_snapshot,
1887 true,
1888 true,
1889 )
1890 .head
1891 });
1892
1893 let (line_numbers, fold_statuses) = self.shape_line_numbers(
1894 start_row..end_row,
1895 &active_rows,
1896 head_for_relative,
1897 is_singleton,
1898 &snapshot,
1899 cx,
1900 );
1901
1902 let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
1903
1904 let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
1905
1906 let mut max_visible_line_width = Pixels::ZERO;
1907 let line_layouts = self.layout_lines(start_row..end_row, &line_numbers, &snapshot, cx);
1908 for line_with_invisibles in &line_layouts {
1909 if line_with_invisibles.line.width > max_visible_line_width {
1910 max_visible_line_width = line_with_invisibles.line.width;
1911 }
1912 }
1913
1914 let longest_line_width = layout_line(snapshot.longest_row(), &snapshot, &style, cx)
1915 .unwrap()
1916 .width;
1917 let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
1918
1919 let (scroll_width, blocks) = cx.with_element_id(Some("editor_blocks"), |cx| {
1920 self.layout_blocks(
1921 start_row..end_row,
1922 &snapshot,
1923 bounds.size.width,
1924 scroll_width,
1925 gutter_padding,
1926 gutter_width,
1927 em_width,
1928 gutter_width + gutter_margin,
1929 line_height,
1930 &style,
1931 &line_layouts,
1932 editor,
1933 cx,
1934 )
1935 });
1936
1937 let scroll_max = point(
1938 f32::from((scroll_width - text_size.width) / em_width).max(0.0),
1939 max_row as f32,
1940 );
1941
1942 let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
1943
1944 let autoscrolled = if autoscroll_horizontally {
1945 editor.autoscroll_horizontally(
1946 start_row,
1947 text_size.width,
1948 scroll_width,
1949 em_width,
1950 &line_layouts,
1951 cx,
1952 )
1953 } else {
1954 false
1955 };
1956
1957 if clamped || autoscrolled {
1958 snapshot = editor.snapshot(cx);
1959 }
1960
1961 let mut context_menu = None;
1962 let mut code_actions_indicator = None;
1963 if let Some(newest_selection_head) = newest_selection_head {
1964 if (start_row..end_row).contains(&newest_selection_head.row()) {
1965 if editor.context_menu_visible() {
1966 let max_height = (12. * line_height).min((bounds.size.height - line_height) / 2.);
1967 context_menu =
1968 editor.render_context_menu(newest_selection_head, &self.style, max_height, cx);
1969 }
1970
1971 let active = matches!(
1972 editor.context_menu.read().as_ref(),
1973 Some(crate::ContextMenu::CodeActions(_))
1974 );
1975
1976 code_actions_indicator = editor
1977 .render_code_actions_indicator(&style, active, cx)
1978 .map(|element| CodeActionsIndicator {
1979 row: newest_selection_head.row(),
1980 button: element,
1981 });
1982 }
1983 }
1984
1985 let visible_rows = start_row..start_row + line_layouts.len() as u32;
1986 let max_size = size(
1987 (120. * em_width) // Default size
1988 .min(bounds.size.width / 2.) // Shrink to half of the editor width
1989 .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
1990 (16. * line_height) // Default size
1991 .min(bounds.size.height / 2.) // Shrink to half of the editor height
1992 .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
1993 );
1994
1995 let mut hover = editor.hover_state.render(
1996 &snapshot,
1997 &style,
1998 visible_rows,
1999 max_size,
2000 editor.workspace.as_ref().map(|(w, _)| w.clone()),
2001 cx,
2002 );
2003
2004 let mut fold_indicators = cx.with_element_id(Some("gutter_fold_indicators"), |cx| {
2005 editor.render_fold_indicators(
2006 fold_statuses,
2007 &style,
2008 editor.gutter_hovered,
2009 line_height,
2010 gutter_margin,
2011 cx,
2012 )
2013 });
2014
2015 let invisible_symbol_font_size = font_size / 2.;
2016 let tab_invisible = cx
2017 .text_system()
2018 .shape_line(
2019 "→".into(),
2020 invisible_symbol_font_size,
2021 &[TextRun {
2022 len: "→".len(),
2023 font: self.style.text.font(),
2024 color: cx.theme().colors().editor_invisible,
2025 background_color: None,
2026 underline: None,
2027 }],
2028 )
2029 .unwrap();
2030 let space_invisible = cx
2031 .text_system()
2032 .shape_line(
2033 "•".into(),
2034 invisible_symbol_font_size,
2035 &[TextRun {
2036 len: "•".len(),
2037 font: self.style.text.font(),
2038 color: cx.theme().colors().editor_invisible,
2039 background_color: None,
2040 underline: None,
2041 }],
2042 )
2043 .unwrap();
2044
2045 LayoutState {
2046 mode: snapshot.mode,
2047 position_map: Arc::new(PositionMap {
2048 size: bounds.size,
2049 scroll_position: point(
2050 scroll_position.x * em_width,
2051 scroll_position.y * line_height,
2052 ),
2053 scroll_max,
2054 line_layouts,
2055 line_height,
2056 em_width,
2057 em_advance,
2058 snapshot,
2059 }),
2060 visible_anchor_range: start_anchor..end_anchor,
2061 visible_display_row_range: start_row..end_row,
2062 wrap_guides,
2063 gutter_size,
2064 gutter_padding,
2065 text_size,
2066 scrollbar_row_range,
2067 show_scrollbars,
2068 is_singleton,
2069 max_row,
2070 gutter_margin,
2071 active_rows,
2072 highlighted_rows,
2073 highlighted_ranges,
2074 line_numbers,
2075 display_hunks,
2076 blocks,
2077 selections,
2078 context_menu,
2079 code_actions_indicator,
2080 fold_indicators,
2081 tab_invisible,
2082 space_invisible,
2083 hover_popovers: hover,
2084 }
2085 })
2086 }
2087
2088 #[allow(clippy::too_many_arguments)]
2089 fn layout_blocks(
2090 &self,
2091 rows: Range<u32>,
2092 snapshot: &EditorSnapshot,
2093 editor_width: Pixels,
2094 scroll_width: Pixels,
2095 gutter_padding: Pixels,
2096 gutter_width: Pixels,
2097 em_width: Pixels,
2098 text_x: Pixels,
2099 line_height: Pixels,
2100 style: &EditorStyle,
2101 line_layouts: &[LineWithInvisibles],
2102 editor: &mut Editor,
2103 cx: &mut ViewContext<Editor>,
2104 ) -> (Pixels, Vec<BlockLayout>) {
2105 let mut block_id = 0;
2106 let scroll_x = snapshot.scroll_anchor.offset.x;
2107 let (fixed_blocks, non_fixed_blocks) = snapshot
2108 .blocks_in_range(rows.clone())
2109 .partition::<Vec<_>, _>(|(_, block)| match block {
2110 TransformBlock::ExcerptHeader { .. } => false,
2111 TransformBlock::Custom(block) => block.style() == BlockStyle::Fixed,
2112 });
2113
2114 let mut render_block = |block: &TransformBlock,
2115 available_space: Size<AvailableSpace>,
2116 block_id: usize,
2117 editor: &mut Editor,
2118 cx: &mut ViewContext<Editor>| {
2119 let mut element = match block {
2120 TransformBlock::Custom(block) => {
2121 let align_to = block
2122 .position()
2123 .to_point(&snapshot.buffer_snapshot)
2124 .to_display_point(snapshot);
2125 let anchor_x = text_x
2126 + if rows.contains(&align_to.row()) {
2127 line_layouts[(align_to.row() - rows.start) as usize]
2128 .line
2129 .x_for_index(align_to.column() as usize)
2130 } else {
2131 layout_line(align_to.row(), snapshot, style, cx)
2132 .unwrap()
2133 .x_for_index(align_to.column() as usize)
2134 };
2135
2136 block.render(&mut BlockContext {
2137 view_context: cx,
2138 anchor_x,
2139 gutter_padding,
2140 line_height,
2141 gutter_width,
2142 em_width,
2143 block_id,
2144 editor_style: &self.style,
2145 })
2146 }
2147
2148 TransformBlock::ExcerptHeader {
2149 buffer,
2150 range,
2151 starts_new_buffer,
2152 ..
2153 } => {
2154 let include_root = editor
2155 .project
2156 .as_ref()
2157 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
2158 .unwrap_or_default();
2159 let jump_icon = project::File::from_dyn(buffer.file()).map(|file| {
2160 let jump_path = ProjectPath {
2161 worktree_id: file.worktree_id(cx),
2162 path: file.path.clone(),
2163 };
2164 let jump_anchor = range
2165 .primary
2166 .as_ref()
2167 .map_or(range.context.start, |primary| primary.start);
2168 let jump_position = language::ToPoint::to_point(&jump_anchor, buffer);
2169
2170 IconButton::new(block_id, ui::Icon::ArrowUpRight)
2171 .on_click(cx.listener_for(&self.editor, move |editor, e, cx| {
2172 editor.jump(jump_path.clone(), jump_position, jump_anchor, cx);
2173 }))
2174 .tooltip(|cx| Tooltip::for_action("Jump to Buffer", &OpenExcerpts, cx))
2175 });
2176
2177 let element = if *starts_new_buffer {
2178 let path = buffer.resolve_file_path(cx, include_root);
2179 let mut filename = None;
2180 let mut parent_path = None;
2181 // Can't use .and_then() because `.file_name()` and `.parent()` return references :(
2182 if let Some(path) = path {
2183 filename = path.file_name().map(|f| f.to_string_lossy().to_string());
2184 parent_path = path
2185 .parent()
2186 .map(|p| SharedString::from(p.to_string_lossy().to_string() + "/"));
2187 }
2188
2189 h_stack()
2190 .id("path header block")
2191 .size_full()
2192 .bg(gpui::red())
2193 .child(
2194 filename
2195 .map(SharedString::from)
2196 .unwrap_or_else(|| "untitled".into()),
2197 )
2198 .children(parent_path)
2199 .children(jump_icon) // .p_x(gutter_padding)
2200 } else {
2201 let text_style = style.text.clone();
2202 h_stack()
2203 .id("collapsed context")
2204 .size_full()
2205 .bg(gpui::red())
2206 .child("⋯")
2207 .children(jump_icon) // .p_x(gutter_padding)
2208 };
2209 element.into_any()
2210 }
2211 };
2212
2213 let size = element.measure(available_space, cx);
2214 (element, size)
2215 };
2216
2217 let mut fixed_block_max_width = Pixels::ZERO;
2218 let mut blocks = Vec::new();
2219 for (row, block) in fixed_blocks {
2220 let available_space = size(
2221 AvailableSpace::MinContent,
2222 AvailableSpace::Definite(block.height() as f32 * line_height),
2223 );
2224 let (element, element_size) =
2225 render_block(block, available_space, block_id, editor, cx);
2226 block_id += 1;
2227 fixed_block_max_width = fixed_block_max_width.max(element_size.width + em_width);
2228 blocks.push(BlockLayout {
2229 row,
2230 element,
2231 available_space,
2232 style: BlockStyle::Fixed,
2233 });
2234 }
2235 for (row, block) in non_fixed_blocks {
2236 let style = match block {
2237 TransformBlock::Custom(block) => block.style(),
2238 TransformBlock::ExcerptHeader { .. } => BlockStyle::Sticky,
2239 };
2240 let width = match style {
2241 BlockStyle::Sticky => editor_width,
2242 BlockStyle::Flex => editor_width
2243 .max(fixed_block_max_width)
2244 .max(gutter_width + scroll_width),
2245 BlockStyle::Fixed => unreachable!(),
2246 };
2247 let available_space = size(
2248 AvailableSpace::Definite(width),
2249 AvailableSpace::Definite(block.height() as f32 * line_height),
2250 );
2251 let (element, _) = render_block(block, available_space, block_id, editor, cx);
2252 block_id += 1;
2253 blocks.push(BlockLayout {
2254 row,
2255 element,
2256 available_space,
2257 style,
2258 });
2259 }
2260 (
2261 scroll_width.max(fixed_block_max_width - gutter_width),
2262 blocks,
2263 )
2264 }
2265
2266 fn paint_mouse_listeners(
2267 &mut self,
2268 bounds: Bounds<Pixels>,
2269 gutter_bounds: Bounds<Pixels>,
2270 text_bounds: Bounds<Pixels>,
2271 layout: &LayoutState,
2272 cx: &mut WindowContext,
2273 ) {
2274 let content_origin = text_bounds.origin + point(layout.gutter_margin, Pixels::ZERO);
2275 let interactive_bounds = InteractiveBounds {
2276 bounds: bounds.intersect(&cx.content_mask().bounds),
2277 stacking_order: cx.stacking_order().clone(),
2278 };
2279
2280 cx.on_mouse_event({
2281 let position_map = layout.position_map.clone();
2282 let editor = self.editor.clone();
2283 let interactive_bounds = interactive_bounds.clone();
2284
2285 move |event: &ScrollWheelEvent, phase, cx| {
2286 if phase != DispatchPhase::Bubble {
2287 return;
2288 }
2289
2290 let should_cancel = editor.update(cx, |editor, cx| {
2291 Self::scroll(editor, event, &position_map, &interactive_bounds, cx)
2292 });
2293 if should_cancel {
2294 cx.stop_propagation();
2295 }
2296 }
2297 });
2298
2299 cx.on_mouse_event({
2300 let position_map = layout.position_map.clone();
2301 let editor = self.editor.clone();
2302 let stacking_order = cx.stacking_order().clone();
2303
2304 move |event: &MouseDownEvent, phase, cx| {
2305 if phase != DispatchPhase::Bubble {
2306 return;
2307 }
2308
2309 let should_cancel = editor.update(cx, |editor, cx| {
2310 Self::mouse_down(
2311 editor,
2312 event,
2313 &position_map,
2314 text_bounds,
2315 gutter_bounds,
2316 &stacking_order,
2317 cx,
2318 )
2319 });
2320
2321 if should_cancel {
2322 cx.stop_propagation()
2323 }
2324 }
2325 });
2326
2327 cx.on_mouse_event({
2328 let position_map = layout.position_map.clone();
2329 let editor = self.editor.clone();
2330 let stacking_order = cx.stacking_order().clone();
2331
2332 move |event: &MouseUpEvent, phase, cx| {
2333 let should_cancel = editor.update(cx, |editor, cx| {
2334 Self::mouse_up(
2335 editor,
2336 event,
2337 &position_map,
2338 text_bounds,
2339 &stacking_order,
2340 cx,
2341 )
2342 });
2343
2344 if should_cancel {
2345 cx.stop_propagation()
2346 }
2347 }
2348 });
2349 //todo!()
2350 // on_down(MouseButton::Right, {
2351 // let position_map = layout.position_map.clone();
2352 // move |event, editor, cx| {
2353 // if !Self::mouse_right_down(
2354 // editor,
2355 // event.position,
2356 // position_map.as_ref(),
2357 // text_bounds,
2358 // cx,
2359 // ) {
2360 // cx.propagate_event();
2361 // }
2362 // }
2363 // });
2364 cx.on_mouse_event({
2365 let position_map = layout.position_map.clone();
2366 let editor = self.editor.clone();
2367 let stacking_order = cx.stacking_order().clone();
2368
2369 move |event: &MouseMoveEvent, phase, cx| {
2370 if phase != DispatchPhase::Bubble {
2371 return;
2372 }
2373
2374 let stop_propogating = editor.update(cx, |editor, cx| {
2375 Self::mouse_moved(
2376 editor,
2377 event,
2378 &position_map,
2379 text_bounds,
2380 gutter_bounds,
2381 &stacking_order,
2382 cx,
2383 )
2384 });
2385
2386 if stop_propogating {
2387 cx.stop_propagation()
2388 }
2389 }
2390 });
2391 }
2392}
2393
2394#[derive(Debug)]
2395pub struct LineWithInvisibles {
2396 pub line: ShapedLine,
2397 invisibles: Vec<Invisible>,
2398}
2399
2400impl LineWithInvisibles {
2401 fn from_chunks<'a>(
2402 chunks: impl Iterator<Item = HighlightedChunk<'a>>,
2403 text_style: &TextStyle,
2404 max_line_len: usize,
2405 max_line_count: usize,
2406 line_number_layouts: &[Option<ShapedLine>],
2407 editor_mode: EditorMode,
2408 cx: &WindowContext,
2409 ) -> Vec<Self> {
2410 let mut layouts = Vec::with_capacity(max_line_count);
2411 let mut line = String::new();
2412 let mut invisibles = Vec::new();
2413 let mut styles = Vec::new();
2414 let mut non_whitespace_added = false;
2415 let mut row = 0;
2416 let mut line_exceeded_max_len = false;
2417 let font_size = text_style.font_size.to_pixels(cx.rem_size());
2418
2419 for highlighted_chunk in chunks.chain([HighlightedChunk {
2420 chunk: "\n",
2421 style: None,
2422 is_tab: false,
2423 }]) {
2424 for (ix, mut line_chunk) in highlighted_chunk.chunk.split('\n').enumerate() {
2425 if ix > 0 {
2426 let shaped_line = cx
2427 .text_system()
2428 .shape_line(line.clone().into(), font_size, &styles)
2429 .unwrap();
2430 layouts.push(Self {
2431 line: shaped_line,
2432 invisibles: invisibles.drain(..).collect(),
2433 });
2434
2435 line.clear();
2436 styles.clear();
2437 row += 1;
2438 line_exceeded_max_len = false;
2439 non_whitespace_added = false;
2440 if row == max_line_count {
2441 return layouts;
2442 }
2443 }
2444
2445 if !line_chunk.is_empty() && !line_exceeded_max_len {
2446 let text_style = if let Some(style) = highlighted_chunk.style {
2447 Cow::Owned(text_style.clone().highlight(style))
2448 } else {
2449 Cow::Borrowed(text_style)
2450 };
2451
2452 if line.len() + line_chunk.len() > max_line_len {
2453 let mut chunk_len = max_line_len - line.len();
2454 while !line_chunk.is_char_boundary(chunk_len) {
2455 chunk_len -= 1;
2456 }
2457 line_chunk = &line_chunk[..chunk_len];
2458 line_exceeded_max_len = true;
2459 }
2460
2461 styles.push(TextRun {
2462 len: line_chunk.len(),
2463 font: text_style.font(),
2464 color: text_style.color,
2465 background_color: text_style.background_color,
2466 underline: text_style.underline,
2467 });
2468
2469 if editor_mode == EditorMode::Full {
2470 // Line wrap pads its contents with fake whitespaces,
2471 // avoid printing them
2472 let inside_wrapped_string = line_number_layouts
2473 .get(row)
2474 .and_then(|layout| layout.as_ref())
2475 .is_none();
2476 if highlighted_chunk.is_tab {
2477 if non_whitespace_added || !inside_wrapped_string {
2478 invisibles.push(Invisible::Tab {
2479 line_start_offset: line.len(),
2480 });
2481 }
2482 } else {
2483 invisibles.extend(
2484 line_chunk
2485 .chars()
2486 .enumerate()
2487 .filter(|(_, line_char)| {
2488 let is_whitespace = line_char.is_whitespace();
2489 non_whitespace_added |= !is_whitespace;
2490 is_whitespace
2491 && (non_whitespace_added || !inside_wrapped_string)
2492 })
2493 .map(|(whitespace_index, _)| Invisible::Whitespace {
2494 line_offset: line.len() + whitespace_index,
2495 }),
2496 )
2497 }
2498 }
2499
2500 line.push_str(line_chunk);
2501 }
2502 }
2503 }
2504
2505 layouts
2506 }
2507
2508 fn draw(
2509 &self,
2510 layout: &LayoutState,
2511 row: u32,
2512 content_origin: gpui::Point<Pixels>,
2513 whitespace_setting: ShowWhitespaceSetting,
2514 selection_ranges: &[Range<DisplayPoint>],
2515 cx: &mut WindowContext,
2516 ) {
2517 let line_height = layout.position_map.line_height;
2518 let line_y = line_height * row as f32 - layout.position_map.scroll_position.y;
2519
2520 self.line.paint(
2521 content_origin + gpui::point(-layout.position_map.scroll_position.x, line_y),
2522 line_height,
2523 cx,
2524 );
2525
2526 self.draw_invisibles(
2527 &selection_ranges,
2528 layout,
2529 content_origin,
2530 line_y,
2531 row,
2532 line_height,
2533 whitespace_setting,
2534 cx,
2535 );
2536 }
2537
2538 fn draw_invisibles(
2539 &self,
2540 selection_ranges: &[Range<DisplayPoint>],
2541 layout: &LayoutState,
2542 content_origin: gpui::Point<Pixels>,
2543 line_y: Pixels,
2544 row: u32,
2545 line_height: Pixels,
2546 whitespace_setting: ShowWhitespaceSetting,
2547 cx: &mut WindowContext,
2548 ) {
2549 let allowed_invisibles_regions = match whitespace_setting {
2550 ShowWhitespaceSetting::None => return,
2551 ShowWhitespaceSetting::Selection => Some(selection_ranges),
2552 ShowWhitespaceSetting::All => None,
2553 };
2554
2555 for invisible in &self.invisibles {
2556 let (&token_offset, invisible_symbol) = match invisible {
2557 Invisible::Tab { line_start_offset } => (line_start_offset, &layout.tab_invisible),
2558 Invisible::Whitespace { line_offset } => (line_offset, &layout.space_invisible),
2559 };
2560
2561 let x_offset = self.line.x_for_index(token_offset);
2562 let invisible_offset =
2563 (layout.position_map.em_width - invisible_symbol.width).max(Pixels::ZERO) / 2.0;
2564 let origin = content_origin
2565 + gpui::point(
2566 x_offset + invisible_offset - layout.position_map.scroll_position.x,
2567 line_y,
2568 );
2569
2570 if let Some(allowed_regions) = allowed_invisibles_regions {
2571 let invisible_point = DisplayPoint::new(row, token_offset as u32);
2572 if !allowed_regions
2573 .iter()
2574 .any(|region| region.start <= invisible_point && invisible_point < region.end)
2575 {
2576 continue;
2577 }
2578 }
2579 invisible_symbol.paint(origin, line_height, cx);
2580 }
2581 }
2582}
2583
2584#[derive(Debug, Clone, Copy, PartialEq, Eq)]
2585enum Invisible {
2586 Tab { line_start_offset: usize },
2587 Whitespace { line_offset: usize },
2588}
2589
2590impl Element for EditorElement {
2591 type State = ();
2592
2593 fn layout(
2594 &mut self,
2595 element_state: Option<Self::State>,
2596 cx: &mut gpui::WindowContext,
2597 ) -> (gpui::LayoutId, Self::State) {
2598 self.editor.update(cx, |editor, cx| {
2599 editor.set_style(self.style.clone(), cx);
2600
2601 let layout_id = match editor.mode {
2602 EditorMode::SingleLine => {
2603 let rem_size = cx.rem_size();
2604 let mut style = Style::default();
2605 style.size.width = relative(1.).into();
2606 style.size.height = self.style.text.line_height_in_pixels(rem_size).into();
2607 cx.request_layout(&style, None)
2608 }
2609 EditorMode::AutoHeight { max_lines } => {
2610 let editor_handle = cx.view().clone();
2611 let max_line_number_width =
2612 self.max_line_number_width(&editor.snapshot(cx), cx);
2613 cx.request_measured_layout(
2614 Style::default(),
2615 move |known_dimensions, available_space, cx| {
2616 editor_handle
2617 .update(cx, |editor, cx| {
2618 dbg!(compute_auto_height_layout(
2619 editor,
2620 max_lines,
2621 max_line_number_width,
2622 known_dimensions,
2623 cx,
2624 ))
2625 })
2626 .unwrap_or_default()
2627 },
2628 )
2629 }
2630 EditorMode::Full => {
2631 let mut style = Style::default();
2632 style.size.width = relative(1.).into();
2633 style.size.height = relative(1.).into();
2634 cx.request_layout(&style, None)
2635 }
2636 };
2637
2638 (layout_id, ())
2639 })
2640 }
2641
2642 fn paint(
2643 mut self,
2644 bounds: Bounds<gpui::Pixels>,
2645 element_state: &mut Self::State,
2646 cx: &mut gpui::WindowContext,
2647 ) {
2648 let editor = self.editor.clone();
2649
2650 let mut layout = self.compute_layout(bounds, cx);
2651 let gutter_bounds = Bounds {
2652 origin: bounds.origin,
2653 size: layout.gutter_size,
2654 };
2655 let text_bounds = Bounds {
2656 origin: gutter_bounds.upper_right(),
2657 size: layout.text_size,
2658 };
2659
2660 let focus_handle = editor.focus_handle(cx);
2661 let dispatch_context = self.editor.read(cx).dispatch_context(cx);
2662 cx.with_key_dispatch(dispatch_context, Some(focus_handle.clone()), |_, cx| {
2663 self.register_actions(cx);
2664
2665 // We call with_z_index to establish a new stacking context.
2666 cx.with_z_index(0, |cx| {
2667 cx.with_content_mask(Some(ContentMask { bounds }), |cx| {
2668 // Paint mouse listeners at z-index 0 so any elements we paint on top of the editor
2669 // take precedence.
2670 cx.with_z_index(0, |cx| {
2671 self.paint_mouse_listeners(bounds, gutter_bounds, text_bounds, &layout, cx);
2672 });
2673 let input_handler = ElementInputHandler::new(bounds, self.editor.clone(), cx);
2674 cx.handle_input(&focus_handle, input_handler);
2675
2676 self.paint_background(gutter_bounds, text_bounds, &layout, cx);
2677 if layout.gutter_size.width > Pixels::ZERO {
2678 self.paint_gutter(gutter_bounds, &mut layout, cx);
2679 }
2680 self.paint_text(text_bounds, &mut layout, cx);
2681
2682 if !layout.blocks.is_empty() {
2683 cx.with_element_id(Some("editor_blocks"), |cx| {
2684 self.paint_blocks(bounds, &mut layout, cx);
2685 })
2686 }
2687 });
2688 });
2689 })
2690 }
2691}
2692
2693impl IntoElement for EditorElement {
2694 type Element = Self;
2695
2696 fn element_id(&self) -> Option<gpui::ElementId> {
2697 self.editor.element_id()
2698 }
2699
2700 fn into_element(self) -> Self::Element {
2701 self
2702 }
2703}
2704
2705// impl EditorElement {
2706// type LayoutState = LayoutState;
2707// type PaintState = ();
2708
2709// fn layout(
2710// &mut self,
2711// constraint: SizeConstraint,
2712// editor: &mut Editor,
2713// cx: &mut ViewContext<Editor>,
2714// ) -> (gpui::Point<Pixels>, Self::LayoutState) {
2715// let mut size = constraint.max;
2716// if size.x.is_infinite() {
2717// unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
2718// }
2719
2720// let snapshot = editor.snapshot(cx);
2721// let style = self.style.clone();
2722
2723// let line_height = (style.text.font_size * style.line_height_scalar).round();
2724
2725// let gutter_padding;
2726// let gutter_width;
2727// let gutter_margin;
2728// if snapshot.show_gutter {
2729// let em_width = style.text.em_width(cx.font_cache());
2730// gutter_padding = (em_width * style.gutter_padding_factor).round();
2731// gutter_width = self.max_line_number_width(&snapshot, cx) + gutter_padding * 2.0;
2732// gutter_margin = -style.text.descent(cx.font_cache());
2733// } else {
2734// gutter_padding = 0.0;
2735// gutter_width = 0.0;
2736// gutter_margin = 0.0;
2737// };
2738
2739// let text_width = size.x - gutter_width;
2740// let em_width = style.text.em_width(cx.font_cache());
2741// let em_advance = style.text.em_advance(cx.font_cache());
2742// let overscroll = point(em_width, 0.);
2743// let snapshot = {
2744// editor.set_visible_line_count(size.y / line_height, cx);
2745
2746// let editor_width = text_width - gutter_margin - overscroll.x - em_width;
2747// let wrap_width = match editor.soft_wrap_mode(cx) {
2748// SoftWrap::None => (MAX_LINE_LEN / 2) as f32 * em_advance,
2749// SoftWrap::EditorWidth => editor_width,
2750// SoftWrap::Column(column) => editor_width.min(column as f32 * em_advance),
2751// };
2752
2753// if editor.set_wrap_width(Some(wrap_width), cx) {
2754// editor.snapshot(cx)
2755// } else {
2756// snapshot
2757// }
2758// };
2759
2760// let wrap_guides = editor
2761// .wrap_guides(cx)
2762// .iter()
2763// .map(|(guide, active)| (self.column_pixels(*guide, cx), *active))
2764// .collect();
2765
2766// let scroll_height = (snapshot.max_point().row() + 1) as f32 * line_height;
2767// if let EditorMode::AutoHeight { max_lines } = snapshot.mode {
2768// size.set_y(
2769// scroll_height
2770// .min(constraint.max_along(Axis::Vertical))
2771// .max(constraint.min_along(Axis::Vertical))
2772// .max(line_height)
2773// .min(line_height * max_lines as f32),
2774// )
2775// } else if let EditorMode::SingleLine = snapshot.mode {
2776// size.set_y(line_height.max(constraint.min_along(Axis::Vertical)))
2777// } else if size.y.is_infinite() {
2778// size.set_y(scroll_height);
2779// }
2780// let gutter_size = point(gutter_width, size.y);
2781// let text_size = point(text_width, size.y);
2782
2783// let autoscroll_horizontally = editor.autoscroll_vertically(size.y, line_height, cx);
2784// let mut snapshot = editor.snapshot(cx);
2785
2786// let scroll_position = snapshot.scroll_position();
2787// // The scroll position is a fractional point, the whole number of which represents
2788// // the top of the window in terms of display rows.
2789// let start_row = scroll_position.y as u32;
2790// let height_in_lines = size.y / line_height;
2791// let max_row = snapshot.max_point().row();
2792
2793// // Add 1 to ensure selections bleed off screen
2794// let end_row = 1 + cmp::min(
2795// (scroll_position.y + height_in_lines).ceil() as u32,
2796// max_row,
2797// );
2798
2799// let start_anchor = if start_row == 0 {
2800// Anchor::min()
2801// } else {
2802// snapshot
2803// .buffer_snapshot
2804// .anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
2805// };
2806// let end_anchor = if end_row > max_row {
2807// Anchor::max
2808// } else {
2809// snapshot
2810// .buffer_snapshot
2811// .anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
2812// };
2813
2814// let mut selections: Vec<(SelectionStyle, Vec<SelectionLayout>)> = Vec::new();
2815// let mut active_rows = BTreeMap::new();
2816// let mut fold_ranges = Vec::new();
2817// let is_singleton = editor.is_singleton(cx);
2818
2819// let highlighted_rows = editor.highlighted_rows();
2820// let theme = theme::current(cx);
2821// let highlighted_ranges = editor.background_highlights_in_range(
2822// start_anchor..end_anchor,
2823// &snapshot.display_snapshot,
2824// theme.as_ref(),
2825// );
2826
2827// fold_ranges.extend(
2828// snapshot
2829// .folds_in_range(start_anchor..end_anchor)
2830// .map(|anchor| {
2831// let start = anchor.start.to_point(&snapshot.buffer_snapshot);
2832// (
2833// start.row,
2834// start.to_display_point(&snapshot.display_snapshot)
2835// ..anchor.end.to_display_point(&snapshot),
2836// )
2837// }),
2838// );
2839
2840// let mut newest_selection_head = None;
2841
2842// if editor.show_local_selections {
2843// let mut local_selections: Vec<Selection<Point>> = editor
2844// .selections
2845// .disjoint_in_range(start_anchor..end_anchor, cx);
2846// local_selections.extend(editor.selections.pending(cx));
2847// let mut layouts = Vec::new();
2848// let newest = editor.selections.newest(cx);
2849// for selection in local_selections.drain(..) {
2850// let is_empty = selection.start == selection.end;
2851// let is_newest = selection == newest;
2852
2853// let layout = SelectionLayout::new(
2854// selection,
2855// editor.selections.line_mode,
2856// editor.cursor_shape,
2857// &snapshot.display_snapshot,
2858// is_newest,
2859// true,
2860// );
2861// if is_newest {
2862// newest_selection_head = Some(layout.head);
2863// }
2864
2865// for row in cmp::max(layout.active_rows.start, start_row)
2866// ..=cmp::min(layout.active_rows.end, end_row)
2867// {
2868// let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
2869// *contains_non_empty_selection |= !is_empty;
2870// }
2871// layouts.push(layout);
2872// }
2873
2874// selections.push((style.selection, layouts));
2875// }
2876
2877// if let Some(collaboration_hub) = &editor.collaboration_hub {
2878// // When following someone, render the local selections in their color.
2879// if let Some(leader_id) = editor.leader_peer_id {
2880// if let Some(collaborator) = collaboration_hub.collaborators(cx).get(&leader_id) {
2881// if let Some(participant_index) = collaboration_hub
2882// .user_participant_indices(cx)
2883// .get(&collaborator.user_id)
2884// {
2885// if let Some((local_selection_style, _)) = selections.first_mut() {
2886// *local_selection_style =
2887// style.selection_style_for_room_participant(participant_index.0);
2888// }
2889// }
2890// }
2891// }
2892
2893// let mut remote_selections = HashMap::default();
2894// for selection in snapshot.remote_selections_in_range(
2895// &(start_anchor..end_anchor),
2896// collaboration_hub.as_ref(),
2897// cx,
2898// ) {
2899// let selection_style = if let Some(participant_index) = selection.participant_index {
2900// style.selection_style_for_room_participant(participant_index.0)
2901// } else {
2902// style.absent_selection
2903// };
2904
2905// // Don't re-render the leader's selections, since the local selections
2906// // match theirs.
2907// if Some(selection.peer_id) == editor.leader_peer_id {
2908// continue;
2909// }
2910
2911// remote_selections
2912// .entry(selection.replica_id)
2913// .or_insert((selection_style, Vec::new()))
2914// .1
2915// .push(SelectionLayout::new(
2916// selection.selection,
2917// selection.line_mode,
2918// selection.cursor_shape,
2919// &snapshot.display_snapshot,
2920// false,
2921// false,
2922// ));
2923// }
2924
2925// selections.extend(remote_selections.into_values());
2926// }
2927
2928// let scrollbar_settings = &settings::get::<EditorSettings>(cx).scrollbar;
2929// let show_scrollbars = match scrollbar_settings.show {
2930// ShowScrollbar::Auto => {
2931// // Git
2932// (is_singleton && scrollbar_settings.git_diff && snapshot.buffer_snapshot.has_git_diffs())
2933// ||
2934// // Selections
2935// (is_singleton && scrollbar_settings.selections && !highlighted_ranges.is_empty)
2936// // Scrollmanager
2937// || editor.scroll_manager.scrollbars_visible()
2938// }
2939// ShowScrollbar::System => editor.scroll_manager.scrollbars_visible(),
2940// ShowScrollbar::Always => true,
2941// ShowScrollbar::Never => false,
2942// };
2943
2944// let fold_ranges: Vec<(BufferRow, Range<DisplayPoint>, Color)> = fold_ranges
2945// .into_iter()
2946// .map(|(id, fold)| {
2947// let color = self
2948// .style
2949// .folds
2950// .ellipses
2951// .background
2952// .style_for(&mut cx.mouse_state::<FoldMarkers>(id as usize))
2953// .color;
2954
2955// (id, fold, color)
2956// })
2957// .collect();
2958
2959// let head_for_relative = newest_selection_head.unwrap_or_else(|| {
2960// let newest = editor.selections.newest::<Point>(cx);
2961// SelectionLayout::new(
2962// newest,
2963// editor.selections.line_mode,
2964// editor.cursor_shape,
2965// &snapshot.display_snapshot,
2966// true,
2967// true,
2968// )
2969// .head
2970// });
2971
2972// let (line_number_layouts, fold_statuses) = self.layout_line_numbers(
2973// start_row..end_row,
2974// &active_rows,
2975// head_for_relative,
2976// is_singleton,
2977// &snapshot,
2978// cx,
2979// );
2980
2981// let display_hunks = self.layout_git_gutters(start_row..end_row, &snapshot);
2982
2983// let scrollbar_row_range = scroll_position.y..(scroll_position.y + height_in_lines);
2984
2985// let mut max_visible_line_width = 0.0;
2986// let line_layouts =
2987// self.layout_lines(start_row..end_row, &line_number_layouts, &snapshot, cx);
2988// for line_with_invisibles in &line_layouts {
2989// if line_with_invisibles.line.width() > max_visible_line_width {
2990// max_visible_line_width = line_with_invisibles.line.width();
2991// }
2992// }
2993
2994// let style = self.style.clone();
2995// let longest_line_width = layout_line(
2996// snapshot.longest_row(),
2997// &snapshot,
2998// &style,
2999// cx.text_layout_cache(),
3000// )
3001// .width();
3002// let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.x;
3003// let em_width = style.text.em_width(cx.font_cache());
3004// let (scroll_width, blocks) = self.layout_blocks(
3005// start_row..end_row,
3006// &snapshot,
3007// size.x,
3008// scroll_width,
3009// gutter_padding,
3010// gutter_width,
3011// em_width,
3012// gutter_width + gutter_margin,
3013// line_height,
3014// &style,
3015// &line_layouts,
3016// editor,
3017// cx,
3018// );
3019
3020// let scroll_max = point(
3021// ((scroll_width - text_size.x) / em_width).max(0.0),
3022// max_row as f32,
3023// );
3024
3025// let clamped = editor.scroll_manager.clamp_scroll_left(scroll_max.x);
3026
3027// let autoscrolled = if autoscroll_horizontally {
3028// editor.autoscroll_horizontally(
3029// start_row,
3030// text_size.x,
3031// scroll_width,
3032// em_width,
3033// &line_layouts,
3034// cx,
3035// )
3036// } else {
3037// false
3038// };
3039
3040// if clamped || autoscrolled {
3041// snapshot = editor.snapshot(cx);
3042// }
3043
3044// let style = editor.style(cx);
3045
3046// let mut context_menu = None;
3047// let mut code_actions_indicator = None;
3048// if let Some(newest_selection_head) = newest_selection_head {
3049// if (start_row..end_row).contains(&newest_selection_head.row()) {
3050// if editor.context_menu_visible() {
3051// context_menu =
3052// editor.render_context_menu(newest_selection_head, style.clone(), cx);
3053// }
3054
3055// let active = matches!(
3056// editor.context_menu.read().as_ref(),
3057// Some(crate::ContextMenu::CodeActions(_))
3058// );
3059
3060// code_actions_indicator = editor
3061// .render_code_actions_indicator(&style, active, cx)
3062// .map(|indicator| (newest_selection_head.row(), indicator));
3063// }
3064// }
3065
3066// let visible_rows = start_row..start_row + line_layouts.len() as u32;
3067// let mut hover = editor.hover_state.render(
3068// &snapshot,
3069// &style,
3070// visible_rows,
3071// editor.workspace.as_ref().map(|(w, _)| w.clone()),
3072// cx,
3073// );
3074// let mode = editor.mode;
3075
3076// let mut fold_indicators = editor.render_fold_indicators(
3077// fold_statuses,
3078// &style,
3079// editor.gutter_hovered,
3080// line_height,
3081// gutter_margin,
3082// cx,
3083// );
3084
3085// if let Some((_, context_menu)) = context_menu.as_mut() {
3086// context_menu.layout(
3087// SizeConstraint {
3088// min: gpui::Point::<Pixels>::zero(),
3089// max: point(
3090// cx.window_size().x * 0.7,
3091// (12. * line_height).min((size.y - line_height) / 2.),
3092// ),
3093// },
3094// editor,
3095// cx,
3096// );
3097// }
3098
3099// if let Some((_, indicator)) = code_actions_indicator.as_mut() {
3100// indicator.layout(
3101// SizeConstraint::strict_along(
3102// Axis::Vertical,
3103// line_height * style.code_actions.vertical_scale,
3104// ),
3105// editor,
3106// cx,
3107// );
3108// }
3109
3110// for fold_indicator in fold_indicators.iter_mut() {
3111// if let Some(indicator) = fold_indicator.as_mut() {
3112// indicator.layout(
3113// SizeConstraint::strict_along(
3114// Axis::Vertical,
3115// line_height * style.code_actions.vertical_scale,
3116// ),
3117// editor,
3118// cx,
3119// );
3120// }
3121// }
3122
3123// if let Some((_, hover_popovers)) = hover.as_mut() {
3124// for hover_popover in hover_popovers.iter_mut() {
3125// hover_popover.layout(
3126// SizeConstraint {
3127// min: gpui::Point::<Pixels>::zero(),
3128// max: point(
3129// (120. * em_width) // Default size
3130// .min(size.x / 2.) // Shrink to half of the editor width
3131// .max(MIN_POPOVER_CHARACTER_WIDTH * em_width), // Apply minimum width of 20 characters
3132// (16. * line_height) // Default size
3133// .min(size.y / 2.) // Shrink to half of the editor height
3134// .max(MIN_POPOVER_LINE_HEIGHT * line_height), // Apply minimum height of 4 lines
3135// ),
3136// },
3137// editor,
3138// cx,
3139// );
3140// }
3141// }
3142
3143// let invisible_symbol_font_size = self.style.text.font_size / 2.0;
3144// let invisible_symbol_style = RunStyle {
3145// color: self.style.whitespace,
3146// font_id: self.style.text.font_id,
3147// underline: Default::default(),
3148// };
3149
3150// (
3151// size,
3152// LayoutState {
3153// mode,
3154// position_map: Arc::new(PositionMap {
3155// size,
3156// scroll_max,
3157// line_layouts,
3158// line_height,
3159// em_width,
3160// em_advance,
3161// snapshot,
3162// }),
3163// visible_display_row_range: start_row..end_row,
3164// wrap_guides,
3165// gutter_size,
3166// gutter_padding,
3167// text_size,
3168// scrollbar_row_range,
3169// show_scrollbars,
3170// is_singleton,
3171// max_row,
3172// gutter_margin,
3173// active_rows,
3174// highlighted_rows,
3175// highlighted_ranges,
3176// fold_ranges,
3177// line_number_layouts,
3178// display_hunks,
3179// blocks,
3180// selections,
3181// context_menu,
3182// code_actions_indicator,
3183// fold_indicators,
3184// tab_invisible: cx.text_layout_cache().layout_str(
3185// "→",
3186// invisible_symbol_font_size,
3187// &[("→".len(), invisible_symbol_style)],
3188// ),
3189// space_invisible: cx.text_layout_cache().layout_str(
3190// "•",
3191// invisible_symbol_font_size,
3192// &[("•".len(), invisible_symbol_style)],
3193// ),
3194// hover_popovers: hover,
3195// },
3196// )
3197// }
3198
3199// fn paint(
3200// &mut self,
3201// bounds: Bounds<Pixels>,
3202// visible_bounds: Bounds<Pixels>,
3203// layout: &mut Self::LayoutState,
3204// editor: &mut Editor,
3205// cx: &mut ViewContext<Editor>,
3206// ) -> Self::PaintState {
3207// let visible_bounds = bounds.intersection(visible_bounds).unwrap_or_default();
3208// cx.scene().push_layer(Some(visible_bounds));
3209
3210// let gutter_bounds = Bounds::<Pixels>::new(bounds.origin, layout.gutter_size);
3211// let text_bounds = Bounds::<Pixels>::new(
3212// bounds.origin + point(layout.gutter_size.x, 0.0),
3213// layout.text_size,
3214// );
3215
3216// Self::attach_mouse_handlers(
3217// &layout.position_map,
3218// layout.hover_popovers.is_some(),
3219// visible_bounds,
3220// text_bounds,
3221// gutter_bounds,
3222// bounds,
3223// cx,
3224// );
3225
3226// self.paint_background(gutter_bounds, text_bounds, layout, cx);
3227// if layout.gutter_size.x > 0. {
3228// self.paint_gutter(gutter_bounds, visible_bounds, layout, editor, cx);
3229// }
3230// self.paint_text(text_bounds, visible_bounds, layout, editor, cx);
3231
3232// cx.scene().push_layer(Some(bounds));
3233// if !layout.blocks.is_empty {
3234// self.paint_blocks(bounds, visible_bounds, layout, editor, cx);
3235// }
3236// self.paint_scrollbar(bounds, layout, &editor, cx);
3237// cx.scene().pop_layer();
3238// cx.scene().pop_layer();
3239// }
3240
3241// fn rect_for_text_range(
3242// &self,
3243// range_utf16: Range<usize>,
3244// bounds: Bounds<Pixels>,
3245// _: Bounds<Pixels>,
3246// layout: &Self::LayoutState,
3247// _: &Self::PaintState,
3248// _: &Editor,
3249// _: &ViewContext<Editor>,
3250// ) -> Option<Bounds<Pixels>> {
3251// let text_bounds = Bounds::<Pixels>::new(
3252// bounds.origin + point(layout.gutter_size.x, 0.0),
3253// layout.text_size,
3254// );
3255// let content_origin = text_bounds.origin + point(layout.gutter_margin, 0.);
3256// let scroll_position = layout.position_map.snapshot.scroll_position();
3257// let start_row = scroll_position.y as u32;
3258// let scroll_top = scroll_position.y * layout.position_map.line_height;
3259// let scroll_left = scroll_position.x * layout.position_map.em_width;
3260
3261// let range_start = OffsetUtf16(range_utf16.start)
3262// .to_display_point(&layout.position_map.snapshot.display_snapshot);
3263// if range_start.row() < start_row {
3264// return None;
3265// }
3266
3267// let line = &layout
3268// .position_map
3269// .line_layouts
3270// .get((range_start.row() - start_row) as usize)?
3271// .line;
3272// let range_start_x = line.x_for_index(range_start.column() as usize);
3273// let range_start_y = range_start.row() as f32 * layout.position_map.line_height;
3274// Some(Bounds::<Pixels>::new(
3275// content_origin
3276// + point(
3277// range_start_x,
3278// range_start_y + layout.position_map.line_height,
3279// )
3280// - point(scroll_left, scroll_top),
3281// point(
3282// layout.position_map.em_width,
3283// layout.position_map.line_height,
3284// ),
3285// ))
3286// }
3287
3288// fn debug(
3289// &self,
3290// bounds: Bounds<Pixels>,
3291// _: &Self::LayoutState,
3292// _: &Self::PaintState,
3293// _: &Editor,
3294// _: &ViewContext<Editor>,
3295// ) -> json::Value {
3296// json!({
3297// "type": "BufferElement",
3298// "bounds": bounds.to_json()
3299// })
3300// }
3301// }
3302
3303type BufferRow = u32;
3304
3305pub struct LayoutState {
3306 position_map: Arc<PositionMap>,
3307 gutter_size: Size<Pixels>,
3308 gutter_padding: Pixels,
3309 gutter_margin: Pixels,
3310 text_size: gpui::Size<Pixels>,
3311 mode: EditorMode,
3312 wrap_guides: SmallVec<[(Pixels, bool); 2]>,
3313 visible_anchor_range: Range<Anchor>,
3314 visible_display_row_range: Range<u32>,
3315 active_rows: BTreeMap<u32, bool>,
3316 highlighted_rows: Option<Range<u32>>,
3317 line_numbers: Vec<Option<ShapedLine>>,
3318 display_hunks: Vec<DisplayDiffHunk>,
3319 blocks: Vec<BlockLayout>,
3320 highlighted_ranges: Vec<(Range<DisplayPoint>, Hsla)>,
3321 selections: Vec<(PlayerColor, Vec<SelectionLayout>)>,
3322 scrollbar_row_range: Range<f32>,
3323 show_scrollbars: bool,
3324 is_singleton: bool,
3325 max_row: u32,
3326 context_menu: Option<(DisplayPoint, AnyElement)>,
3327 code_actions_indicator: Option<CodeActionsIndicator>,
3328 hover_popovers: Option<(DisplayPoint, Vec<AnyElement>)>,
3329 fold_indicators: Vec<Option<IconButton>>,
3330 tab_invisible: ShapedLine,
3331 space_invisible: ShapedLine,
3332}
3333
3334struct CodeActionsIndicator {
3335 row: u32,
3336 button: IconButton,
3337}
3338
3339struct PositionMap {
3340 size: Size<Pixels>,
3341 line_height: Pixels,
3342 scroll_position: gpui::Point<Pixels>,
3343 scroll_max: gpui::Point<f32>,
3344 em_width: Pixels,
3345 em_advance: Pixels,
3346 line_layouts: Vec<LineWithInvisibles>,
3347 snapshot: EditorSnapshot,
3348}
3349
3350#[derive(Debug, Copy, Clone)]
3351pub struct PointForPosition {
3352 pub previous_valid: DisplayPoint,
3353 pub next_valid: DisplayPoint,
3354 pub exact_unclipped: DisplayPoint,
3355 pub column_overshoot_after_line_end: u32,
3356}
3357
3358impl PointForPosition {
3359 #[cfg(test)]
3360 pub fn valid(valid: DisplayPoint) -> Self {
3361 Self {
3362 previous_valid: valid,
3363 next_valid: valid,
3364 exact_unclipped: valid,
3365 column_overshoot_after_line_end: 0,
3366 }
3367 }
3368
3369 pub fn as_valid(&self) -> Option<DisplayPoint> {
3370 if self.previous_valid == self.exact_unclipped && self.next_valid == self.exact_unclipped {
3371 Some(self.previous_valid)
3372 } else {
3373 None
3374 }
3375 }
3376}
3377
3378impl PositionMap {
3379 fn point_for_position(
3380 &self,
3381 text_bounds: Bounds<Pixels>,
3382 position: gpui::Point<Pixels>,
3383 ) -> PointForPosition {
3384 let scroll_position = self.snapshot.scroll_position();
3385 let position = position - text_bounds.origin;
3386 let y = position.y.max(px(0.)).min(self.size.width);
3387 let x = position.x + (scroll_position.x * self.em_width);
3388 let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;
3389
3390 let (column, x_overshoot_after_line_end) = if let Some(line) = self
3391 .line_layouts
3392 .get(row as usize - scroll_position.y as usize)
3393 .map(|&LineWithInvisibles { ref line, .. }| line)
3394 {
3395 if let Some(ix) = line.index_for_x(x) {
3396 (ix as u32, px(0.))
3397 } else {
3398 (line.len as u32, px(0.).max(x - line.width))
3399 }
3400 } else {
3401 (0, x)
3402 };
3403
3404 let mut exact_unclipped = DisplayPoint::new(row, column);
3405 let previous_valid = self.snapshot.clip_point(exact_unclipped, Bias::Left);
3406 let next_valid = self.snapshot.clip_point(exact_unclipped, Bias::Right);
3407
3408 let column_overshoot_after_line_end = (x_overshoot_after_line_end / self.em_advance) as u32;
3409 *exact_unclipped.column_mut() += column_overshoot_after_line_end;
3410 PointForPosition {
3411 previous_valid,
3412 next_valid,
3413 exact_unclipped,
3414 column_overshoot_after_line_end,
3415 }
3416 }
3417}
3418
3419struct BlockLayout {
3420 row: u32,
3421 element: AnyElement,
3422 available_space: Size<AvailableSpace>,
3423 style: BlockStyle,
3424}
3425
3426fn layout_line(
3427 row: u32,
3428 snapshot: &EditorSnapshot,
3429 style: &EditorStyle,
3430 cx: &WindowContext,
3431) -> Result<ShapedLine> {
3432 let mut line = snapshot.line(row);
3433
3434 if line.len() > MAX_LINE_LEN {
3435 let mut len = MAX_LINE_LEN;
3436 while !line.is_char_boundary(len) {
3437 len -= 1;
3438 }
3439
3440 line.truncate(len);
3441 }
3442
3443 cx.text_system().shape_line(
3444 line.into(),
3445 style.text.font_size.to_pixels(cx.rem_size()),
3446 &[TextRun {
3447 len: snapshot.line_len(row) as usize,
3448 font: style.text.font(),
3449 color: Hsla::default(),
3450 background_color: None,
3451 underline: None,
3452 }],
3453 )
3454}
3455
3456#[derive(Debug)]
3457pub struct Cursor {
3458 origin: gpui::Point<Pixels>,
3459 block_width: Pixels,
3460 line_height: Pixels,
3461 color: Hsla,
3462 shape: CursorShape,
3463 block_text: Option<ShapedLine>,
3464}
3465
3466impl Cursor {
3467 pub fn new(
3468 origin: gpui::Point<Pixels>,
3469 block_width: Pixels,
3470 line_height: Pixels,
3471 color: Hsla,
3472 shape: CursorShape,
3473 block_text: Option<ShapedLine>,
3474 ) -> Cursor {
3475 Cursor {
3476 origin,
3477 block_width,
3478 line_height,
3479 color,
3480 shape,
3481 block_text,
3482 }
3483 }
3484
3485 pub fn bounding_rect(&self, origin: gpui::Point<Pixels>) -> Bounds<Pixels> {
3486 Bounds {
3487 origin: self.origin + origin,
3488 size: size(self.block_width, self.line_height),
3489 }
3490 }
3491
3492 pub fn paint(&self, origin: gpui::Point<Pixels>, cx: &mut WindowContext) {
3493 let bounds = match self.shape {
3494 CursorShape::Bar => Bounds {
3495 origin: self.origin + origin,
3496 size: size(px(2.0), self.line_height),
3497 },
3498 CursorShape::Block | CursorShape::Hollow => Bounds {
3499 origin: self.origin + origin,
3500 size: size(self.block_width, self.line_height),
3501 },
3502 CursorShape::Underscore => Bounds {
3503 origin: self.origin
3504 + origin
3505 + gpui::Point::new(Pixels::ZERO, self.line_height - px(2.0)),
3506 size: size(self.block_width, px(2.0)),
3507 },
3508 };
3509
3510 //Draw background or border quad
3511 if matches!(self.shape, CursorShape::Hollow) {
3512 cx.paint_quad(
3513 bounds,
3514 Corners::default(),
3515 transparent_black(),
3516 Edges::all(px(1.)),
3517 self.color,
3518 );
3519 } else {
3520 cx.paint_quad(
3521 bounds,
3522 Corners::default(),
3523 self.color,
3524 Edges::default(),
3525 transparent_black(),
3526 );
3527 }
3528
3529 if let Some(block_text) = &self.block_text {
3530 block_text.paint(self.origin + origin, self.line_height, cx);
3531 }
3532 }
3533
3534 pub fn shape(&self) -> CursorShape {
3535 self.shape
3536 }
3537}
3538
3539#[derive(Debug)]
3540pub struct HighlightedRange {
3541 pub start_y: Pixels,
3542 pub line_height: Pixels,
3543 pub lines: Vec<HighlightedRangeLine>,
3544 pub color: Hsla,
3545 pub corner_radius: Pixels,
3546}
3547
3548#[derive(Debug)]
3549pub struct HighlightedRangeLine {
3550 pub start_x: Pixels,
3551 pub end_x: Pixels,
3552}
3553
3554impl HighlightedRange {
3555 pub fn paint(&self, bounds: Bounds<Pixels>, cx: &mut WindowContext) {
3556 if self.lines.len() >= 2 && self.lines[0].start_x > self.lines[1].end_x {
3557 self.paint_lines(self.start_y, &self.lines[0..1], bounds, cx);
3558 self.paint_lines(
3559 self.start_y + self.line_height,
3560 &self.lines[1..],
3561 bounds,
3562 cx,
3563 );
3564 } else {
3565 self.paint_lines(self.start_y, &self.lines, bounds, cx);
3566 }
3567 }
3568
3569 fn paint_lines(
3570 &self,
3571 start_y: Pixels,
3572 lines: &[HighlightedRangeLine],
3573 bounds: Bounds<Pixels>,
3574 cx: &mut WindowContext,
3575 ) {
3576 if lines.is_empty() {
3577 return;
3578 }
3579
3580 let first_line = lines.first().unwrap();
3581 let last_line = lines.last().unwrap();
3582
3583 let first_top_left = point(first_line.start_x, start_y);
3584 let first_top_right = point(first_line.end_x, start_y);
3585
3586 let curve_height = point(Pixels::ZERO, self.corner_radius);
3587 let curve_width = |start_x: Pixels, end_x: Pixels| {
3588 let max = (end_x - start_x) / 2.;
3589 let width = if max < self.corner_radius {
3590 max
3591 } else {
3592 self.corner_radius
3593 };
3594
3595 point(width, Pixels::ZERO)
3596 };
3597
3598 let top_curve_width = curve_width(first_line.start_x, first_line.end_x);
3599 let mut path = gpui::Path::new(first_top_right - top_curve_width);
3600 path.curve_to(first_top_right + curve_height, first_top_right);
3601
3602 let mut iter = lines.iter().enumerate().peekable();
3603 while let Some((ix, line)) = iter.next() {
3604 let bottom_right = point(line.end_x, start_y + (ix + 1) as f32 * self.line_height);
3605
3606 if let Some((_, next_line)) = iter.peek() {
3607 let next_top_right = point(next_line.end_x, bottom_right.y);
3608
3609 match next_top_right.x.partial_cmp(&bottom_right.x).unwrap() {
3610 Ordering::Equal => {
3611 path.line_to(bottom_right);
3612 }
3613 Ordering::Less => {
3614 let curve_width = curve_width(next_top_right.x, bottom_right.x);
3615 path.line_to(bottom_right - curve_height);
3616 if self.corner_radius > Pixels::ZERO {
3617 path.curve_to(bottom_right - curve_width, bottom_right);
3618 }
3619 path.line_to(next_top_right + curve_width);
3620 if self.corner_radius > Pixels::ZERO {
3621 path.curve_to(next_top_right + curve_height, next_top_right);
3622 }
3623 }
3624 Ordering::Greater => {
3625 let curve_width = curve_width(bottom_right.x, next_top_right.x);
3626 path.line_to(bottom_right - curve_height);
3627 if self.corner_radius > Pixels::ZERO {
3628 path.curve_to(bottom_right + curve_width, bottom_right);
3629 }
3630 path.line_to(next_top_right - curve_width);
3631 if self.corner_radius > Pixels::ZERO {
3632 path.curve_to(next_top_right + curve_height, next_top_right);
3633 }
3634 }
3635 }
3636 } else {
3637 let curve_width = curve_width(line.start_x, line.end_x);
3638 path.line_to(bottom_right - curve_height);
3639 if self.corner_radius > Pixels::ZERO {
3640 path.curve_to(bottom_right - curve_width, bottom_right);
3641 }
3642
3643 let bottom_left = point(line.start_x, bottom_right.y);
3644 path.line_to(bottom_left + curve_width);
3645 if self.corner_radius > Pixels::ZERO {
3646 path.curve_to(bottom_left - curve_height, bottom_left);
3647 }
3648 }
3649 }
3650
3651 if first_line.start_x > last_line.start_x {
3652 let curve_width = curve_width(last_line.start_x, first_line.start_x);
3653 let second_top_left = point(last_line.start_x, start_y + self.line_height);
3654 path.line_to(second_top_left + curve_height);
3655 if self.corner_radius > Pixels::ZERO {
3656 path.curve_to(second_top_left + curve_width, second_top_left);
3657 }
3658 let first_bottom_left = point(first_line.start_x, second_top_left.y);
3659 path.line_to(first_bottom_left - curve_width);
3660 if self.corner_radius > Pixels::ZERO {
3661 path.curve_to(first_bottom_left - curve_height, first_bottom_left);
3662 }
3663 }
3664
3665 path.line_to(first_top_left + curve_height);
3666 if self.corner_radius > Pixels::ZERO {
3667 path.curve_to(first_top_left + top_curve_width, first_top_left);
3668 }
3669 path.line_to(first_top_right - top_curve_width);
3670
3671 cx.paint_path(path, self.color);
3672 }
3673}
3674
3675pub fn scale_vertical_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3676 (delta.pow(1.5) / 100.0).into()
3677}
3678
3679fn scale_horizontal_mouse_autoscroll_delta(delta: Pixels) -> f32 {
3680 (delta.pow(1.2) / 300.0).into()
3681}
3682
3683// #[cfg(test)]
3684// mod tests {
3685// use super::*;
3686// use crate::{
3687// display_map::{BlockDisposition, BlockProperties},
3688// editor_tests::{init_test, update_test_language_settings},
3689// Editor, MultiBuffer,
3690// };
3691// use gpui::TestAppContext;
3692// use language::language_settings;
3693// use log::info;
3694// use std::{num::NonZeroU32, sync::Arc};
3695// use util::test::sample_text;
3696
3697// #[gpui::test]
3698// fn test_layout_line_numbers(cx: &mut TestAppContext) {
3699// init_test(cx, |_| {});
3700// let editor = cx
3701// .add_window(|cx| {
3702// let buffer = MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx);
3703// Editor::new(EditorMode::Full, buffer, None, None, cx)
3704// })
3705// .root(cx);
3706// let element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3707
3708// let layouts = editor.update(cx, |editor, cx| {
3709// let snapshot = editor.snapshot(cx);
3710// element
3711// .layout_line_numbers(
3712// 0..6,
3713// &Default::default(),
3714// DisplayPoint::new(0, 0),
3715// false,
3716// &snapshot,
3717// cx,
3718// )
3719// .0
3720// });
3721// assert_eq!(layouts.len(), 6);
3722
3723// let relative_rows = editor.update(cx, |editor, cx| {
3724// let snapshot = editor.snapshot(cx);
3725// element.calculate_relative_line_numbers(&snapshot, &(0..6), Some(3))
3726// });
3727// assert_eq!(relative_rows[&0], 3);
3728// assert_eq!(relative_rows[&1], 2);
3729// assert_eq!(relative_rows[&2], 1);
3730// // current line has no relative number
3731// assert_eq!(relative_rows[&4], 1);
3732// assert_eq!(relative_rows[&5], 2);
3733
3734// // works if cursor is before screen
3735// let relative_rows = editor.update(cx, |editor, cx| {
3736// let snapshot = editor.snapshot(cx);
3737
3738// element.calculate_relative_line_numbers(&snapshot, &(3..6), Some(1))
3739// });
3740// assert_eq!(relative_rows.len(), 3);
3741// assert_eq!(relative_rows[&3], 2);
3742// assert_eq!(relative_rows[&4], 3);
3743// assert_eq!(relative_rows[&5], 4);
3744
3745// // works if cursor is after screen
3746// let relative_rows = editor.update(cx, |editor, cx| {
3747// let snapshot = editor.snapshot(cx);
3748
3749// element.calculate_relative_line_numbers(&snapshot, &(0..3), Some(6))
3750// });
3751// assert_eq!(relative_rows.len(), 3);
3752// assert_eq!(relative_rows[&0], 5);
3753// assert_eq!(relative_rows[&1], 4);
3754// assert_eq!(relative_rows[&2], 3);
3755// }
3756
3757// #[gpui::test]
3758// async fn test_vim_visual_selections(cx: &mut TestAppContext) {
3759// init_test(cx, |_| {});
3760
3761// let editor = cx
3762// .add_window(|cx| {
3763// let buffer = MultiBuffer::build_simple(&(sample_text(6, 6, 'a') + "\n"), cx);
3764// Editor::new(EditorMode::Full, buffer, None, None, cx)
3765// })
3766// .root(cx);
3767// let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3768// let (_, state) = editor.update(cx, |editor, cx| {
3769// editor.cursor_shape = CursorShape::Block;
3770// editor.change_selections(None, cx, |s| {
3771// s.select_ranges([
3772// Point::new(0, 0)..Point::new(1, 0),
3773// Point::new(3, 2)..Point::new(3, 3),
3774// Point::new(5, 6)..Point::new(6, 0),
3775// ]);
3776// });
3777// element.layout(
3778// SizeConstraint::new(point(500., 500.), point(500., 500.)),
3779// editor,
3780// cx,
3781// )
3782// });
3783// assert_eq!(state.selections.len(), 1);
3784// let local_selections = &state.selections[0].1;
3785// assert_eq!(local_selections.len(), 3);
3786// // moves cursor back one line
3787// assert_eq!(local_selections[0].head, DisplayPoint::new(0, 6));
3788// assert_eq!(
3789// local_selections[0].range,
3790// DisplayPoint::new(0, 0)..DisplayPoint::new(1, 0)
3791// );
3792
3793// // moves cursor back one column
3794// assert_eq!(
3795// local_selections[1].range,
3796// DisplayPoint::new(3, 2)..DisplayPoint::new(3, 3)
3797// );
3798// assert_eq!(local_selections[1].head, DisplayPoint::new(3, 2));
3799
3800// // leaves cursor on the max point
3801// assert_eq!(
3802// local_selections[2].range,
3803// DisplayPoint::new(5, 6)..DisplayPoint::new(6, 0)
3804// );
3805// assert_eq!(local_selections[2].head, DisplayPoint::new(6, 0));
3806
3807// // active lines does not include 1 (even though the range of the selection does)
3808// assert_eq!(
3809// state.active_rows.keys().cloned().collect::<Vec<u32>>(),
3810// vec![0, 3, 5, 6]
3811// );
3812
3813// // multi-buffer support
3814// // in DisplayPoint co-ordinates, this is what we're dealing with:
3815// // 0: [[file
3816// // 1: header]]
3817// // 2: aaaaaa
3818// // 3: bbbbbb
3819// // 4: cccccc
3820// // 5:
3821// // 6: ...
3822// // 7: ffffff
3823// // 8: gggggg
3824// // 9: hhhhhh
3825// // 10:
3826// // 11: [[file
3827// // 12: header]]
3828// // 13: bbbbbb
3829// // 14: cccccc
3830// // 15: dddddd
3831// let editor = cx
3832// .add_window(|cx| {
3833// let buffer = MultiBuffer::build_multi(
3834// [
3835// (
3836// &(sample_text(8, 6, 'a') + "\n"),
3837// vec![
3838// Point::new(0, 0)..Point::new(3, 0),
3839// Point::new(4, 0)..Point::new(7, 0),
3840// ],
3841// ),
3842// (
3843// &(sample_text(8, 6, 'a') + "\n"),
3844// vec![Point::new(1, 0)..Point::new(3, 0)],
3845// ),
3846// ],
3847// cx,
3848// );
3849// Editor::new(EditorMode::Full, buffer, None, None, cx)
3850// })
3851// .root(cx);
3852// let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3853// let (_, state) = editor.update(cx, |editor, cx| {
3854// editor.cursor_shape = CursorShape::Block;
3855// editor.change_selections(None, cx, |s| {
3856// s.select_display_ranges([
3857// DisplayPoint::new(4, 0)..DisplayPoint::new(7, 0),
3858// DisplayPoint::new(10, 0)..DisplayPoint::new(13, 0),
3859// ]);
3860// });
3861// element.layout(
3862// SizeConstraint::new(point(500., 500.), point(500., 500.)),
3863// editor,
3864// cx,
3865// )
3866// });
3867
3868// assert_eq!(state.selections.len(), 1);
3869// let local_selections = &state.selections[0].1;
3870// assert_eq!(local_selections.len(), 2);
3871
3872// // moves cursor on excerpt boundary back a line
3873// // and doesn't allow selection to bleed through
3874// assert_eq!(
3875// local_selections[0].range,
3876// DisplayPoint::new(4, 0)..DisplayPoint::new(6, 0)
3877// );
3878// assert_eq!(local_selections[0].head, DisplayPoint::new(5, 0));
3879
3880// // moves cursor on buffer boundary back two lines
3881// // and doesn't allow selection to bleed through
3882// assert_eq!(
3883// local_selections[1].range,
3884// DisplayPoint::new(10, 0)..DisplayPoint::new(11, 0)
3885// );
3886// assert_eq!(local_selections[1].head, DisplayPoint::new(10, 0));
3887// }
3888
3889// #[gpui::test]
3890// fn test_layout_with_placeholder_text_and_blocks(cx: &mut TestAppContext) {
3891// init_test(cx, |_| {});
3892
3893// let editor = cx
3894// .add_window(|cx| {
3895// let buffer = MultiBuffer::build_simple("", cx);
3896// Editor::new(EditorMode::Full, buffer, None, None, cx)
3897// })
3898// .root(cx);
3899
3900// editor.update(cx, |editor, cx| {
3901// editor.set_placeholder_text("hello", cx);
3902// editor.insert_blocks(
3903// [BlockProperties {
3904// style: BlockStyle::Fixed,
3905// disposition: BlockDisposition::Above,
3906// height: 3,
3907// position: Anchor::min(),
3908// render: Arc::new(|_| Empty::new().into_any),
3909// }],
3910// None,
3911// cx,
3912// );
3913
3914// // Blur the editor so that it displays placeholder text.
3915// cx.blur();
3916// });
3917
3918// let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
3919// let (size, mut state) = editor.update(cx, |editor, cx| {
3920// element.layout(
3921// SizeConstraint::new(point(500., 500.), point(500., 500.)),
3922// editor,
3923// cx,
3924// )
3925// });
3926
3927// assert_eq!(state.position_map.line_layouts.len(), 4);
3928// assert_eq!(
3929// state
3930// .line_number_layouts
3931// .iter()
3932// .map(Option::is_some)
3933// .collect::<Vec<_>>(),
3934// &[false, false, false, true]
3935// );
3936
3937// // Don't panic.
3938// let bounds = Bounds::<Pixels>::new(Default::default(), size);
3939// editor.update(cx, |editor, cx| {
3940// element.paint(bounds, bounds, &mut state, editor, cx);
3941// });
3942// }
3943
3944// #[gpui::test]
3945// fn test_all_invisibles_drawing(cx: &mut TestAppContext) {
3946// const TAB_SIZE: u32 = 4;
3947
3948// let input_text = "\t \t|\t| a b";
3949// let expected_invisibles = vec![
3950// Invisible::Tab {
3951// line_start_offset: 0,
3952// },
3953// Invisible::Whitespace {
3954// line_offset: TAB_SIZE as usize,
3955// },
3956// Invisible::Tab {
3957// line_start_offset: TAB_SIZE as usize + 1,
3958// },
3959// Invisible::Tab {
3960// line_start_offset: TAB_SIZE as usize * 2 + 1,
3961// },
3962// Invisible::Whitespace {
3963// line_offset: TAB_SIZE as usize * 3 + 1,
3964// },
3965// Invisible::Whitespace {
3966// line_offset: TAB_SIZE as usize * 3 + 3,
3967// },
3968// ];
3969// assert_eq!(
3970// expected_invisibles.len(),
3971// input_text
3972// .chars()
3973// .filter(|initial_char| initial_char.is_whitespace())
3974// .count(),
3975// "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
3976// );
3977
3978// init_test(cx, |s| {
3979// s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3980// s.defaults.tab_size = NonZeroU32::new(TAB_SIZE);
3981// });
3982
3983// let actual_invisibles =
3984// collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, 500.0);
3985
3986// assert_eq!(expected_invisibles, actual_invisibles);
3987// }
3988
3989// #[gpui::test]
3990// fn test_invisibles_dont_appear_in_certain_editors(cx: &mut TestAppContext) {
3991// init_test(cx, |s| {
3992// s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
3993// s.defaults.tab_size = NonZeroU32::new(4);
3994// });
3995
3996// for editor_mode_without_invisibles in [
3997// EditorMode::SingleLine,
3998// EditorMode::AutoHeight { max_lines: 100 },
3999// ] {
4000// let invisibles = collect_invisibles_from_new_editor(
4001// cx,
4002// editor_mode_without_invisibles,
4003// "\t\t\t| | a b",
4004// 500.0,
4005// );
4006// assert!(invisibles.is_empty,
4007// "For editor mode {editor_mode_without_invisibles:?} no invisibles was expected but got {invisibles:?}");
4008// }
4009// }
4010
4011// #[gpui::test]
4012// fn test_wrapped_invisibles_drawing(cx: &mut TestAppContext) {
4013// let tab_size = 4;
4014// let input_text = "a\tbcd ".repeat(9);
4015// let repeated_invisibles = [
4016// Invisible::Tab {
4017// line_start_offset: 1,
4018// },
4019// Invisible::Whitespace {
4020// line_offset: tab_size as usize + 3,
4021// },
4022// Invisible::Whitespace {
4023// line_offset: tab_size as usize + 4,
4024// },
4025// Invisible::Whitespace {
4026// line_offset: tab_size as usize + 5,
4027// },
4028// ];
4029// let expected_invisibles = std::iter::once(repeated_invisibles)
4030// .cycle()
4031// .take(9)
4032// .flatten()
4033// .collect::<Vec<_>>();
4034// assert_eq!(
4035// expected_invisibles.len(),
4036// input_text
4037// .chars()
4038// .filter(|initial_char| initial_char.is_whitespace())
4039// .count(),
4040// "Hardcoded expected invisibles differ from the actual ones in '{input_text}'"
4041// );
4042// info!("Expected invisibles: {expected_invisibles:?}");
4043
4044// init_test(cx, |_| {});
4045
4046// // Put the same string with repeating whitespace pattern into editors of various size,
4047// // take deliberately small steps during resizing, to put all whitespace kinds near the wrap point.
4048// let resize_step = 10.0;
4049// let mut editor_width = 200.0;
4050// while editor_width <= 1000.0 {
4051// update_test_language_settings(cx, |s| {
4052// s.defaults.tab_size = NonZeroU32::new(tab_size);
4053// s.defaults.show_whitespaces = Some(ShowWhitespaceSetting::All);
4054// s.defaults.preferred_line_length = Some(editor_width as u32);
4055// s.defaults.soft_wrap = Some(language_settings::SoftWrap::PreferredLineLength);
4056// });
4057
4058// let actual_invisibles =
4059// collect_invisibles_from_new_editor(cx, EditorMode::Full, &input_text, editor_width);
4060
4061// // Whatever the editor size is, ensure it has the same invisible kinds in the same order
4062// // (no good guarantees about the offsets: wrapping could trigger padding and its tests should check the offsets).
4063// let mut i = 0;
4064// for (actual_index, actual_invisible) in actual_invisibles.iter().enumerate() {
4065// i = actual_index;
4066// match expected_invisibles.get(i) {
4067// Some(expected_invisible) => match (expected_invisible, actual_invisible) {
4068// (Invisible::Whitespace { .. }, Invisible::Whitespace { .. })
4069// | (Invisible::Tab { .. }, Invisible::Tab { .. }) => {}
4070// _ => {
4071// panic!("At index {i}, expected invisible {expected_invisible:?} does not match actual {actual_invisible:?} by kind. Actual invisibles: {actual_invisibles:?}")
4072// }
4073// },
4074// None => panic!("Unexpected extra invisible {actual_invisible:?} at index {i}"),
4075// }
4076// }
4077// let missing_expected_invisibles = &expected_invisibles[i + 1..];
4078// assert!(
4079// missing_expected_invisibles.is_empty,
4080// "Missing expected invisibles after index {i}: {missing_expected_invisibles:?}"
4081// );
4082
4083// editor_width += resize_step;
4084// }
4085// }
4086
4087// fn collect_invisibles_from_new_editor(
4088// cx: &mut TestAppContext,
4089// editor_mode: EditorMode,
4090// input_text: &str,
4091// editor_width: f32,
4092// ) -> Vec<Invisible> {
4093// info!(
4094// "Creating editor with mode {editor_mode:?}, width {editor_width} and text '{input_text}'"
4095// );
4096// let editor = cx
4097// .add_window(|cx| {
4098// let buffer = MultiBuffer::build_simple(&input_text, cx);
4099// Editor::new(editor_mode, buffer, None, None, cx)
4100// })
4101// .root(cx);
4102
4103// let mut element = EditorElement::new(editor.read_with(cx, |editor, cx| editor.style(cx)));
4104// let (_, layout_state) = editor.update(cx, |editor, cx| {
4105// editor.set_soft_wrap_mode(language_settings::SoftWrap::EditorWidth, cx);
4106// editor.set_wrap_width(Some(editor_width), cx);
4107
4108// element.layout(
4109// SizeConstraint::new(point(editor_width, 500.), point(editor_width, 500.)),
4110// editor,
4111// cx,
4112// )
4113// });
4114
4115// layout_state
4116// .position_map
4117// .line_layouts
4118// .iter()
4119// .map(|line_with_invisibles| &line_with_invisibles.invisibles)
4120// .flatten()
4121// .cloned()
4122// .collect()
4123// }
4124// }
4125
4126pub fn register_action<T: Action>(
4127 view: &View<Editor>,
4128 cx: &mut WindowContext,
4129 listener: impl Fn(&mut Editor, &T, &mut ViewContext<Editor>) + 'static,
4130) {
4131 let view = view.clone();
4132 cx.on_action(TypeId::of::<T>(), move |action, phase, cx| {
4133 let action = action.downcast_ref().unwrap();
4134 if phase == DispatchPhase::Bubble {
4135 view.update(cx, |editor, cx| {
4136 listener(editor, action, cx);
4137 })
4138 }
4139 })
4140}
4141
4142fn compute_auto_height_layout(
4143 editor: &mut Editor,
4144 max_lines: usize,
4145 max_line_number_width: Pixels,
4146 known_dimensions: Size<Option<Pixels>>,
4147 cx: &mut ViewContext<Editor>,
4148) -> Option<Size<Pixels>> {
4149 let mut width = known_dimensions.width?;
4150 if let Some(height) = known_dimensions.height {
4151 return Some(size(width, height));
4152 }
4153
4154 let style = editor.style.as_ref().unwrap();
4155 let font_id = cx.text_system().font_id(&style.text.font()).unwrap();
4156 let font_size = style.text.font_size.to_pixels(cx.rem_size());
4157 let line_height = style.text.line_height_in_pixels(cx.rem_size());
4158 let em_width = cx
4159 .text_system()
4160 .typographic_bounds(font_id, font_size, 'm')
4161 .unwrap()
4162 .size
4163 .width;
4164
4165 let mut snapshot = editor.snapshot(cx);
4166 let gutter_padding;
4167 let gutter_width;
4168 let gutter_margin;
4169 if snapshot.show_gutter {
4170 let descent = cx.text_system().descent(font_id, font_size).unwrap();
4171 let gutter_padding_factor = 3.5;
4172 gutter_padding = (em_width * gutter_padding_factor).round();
4173 gutter_width = max_line_number_width + gutter_padding * 2.0;
4174 gutter_margin = -descent;
4175 } else {
4176 gutter_padding = Pixels::ZERO;
4177 gutter_width = Pixels::ZERO;
4178 gutter_margin = Pixels::ZERO;
4179 };
4180
4181 editor.gutter_width = gutter_width;
4182 let text_width = width - gutter_width;
4183 let overscroll = size(em_width, px(0.));
4184
4185 let editor_width = text_width - gutter_margin - overscroll.width - em_width;
4186 println!("setting wrap width during layout: {editor_width:?}");
4187 if editor.set_wrap_width(Some(editor_width), cx) {
4188 snapshot = editor.snapshot(cx);
4189 }
4190
4191 let scroll_height = Pixels::from(snapshot.max_point().row() + 1) * line_height;
4192 let height = scroll_height
4193 .max(line_height)
4194 .min(line_height * max_lines as f32);
4195
4196 Some(size(width, height))
4197}