1use std::{
2 ops::{Range, RangeInclusive},
3 sync::Arc,
4};
5
6use collections::{hash_map, HashMap, HashSet};
7use git::diff::DiffHunkStatus;
8use gpui::{Action, AppContext, CursorStyle, Hsla, Model, MouseButton, Subscription, Task, View};
9use language::Buffer;
10use multi_buffer::{
11 Anchor, AnchorRangeExt, ExcerptRange, MultiBuffer, MultiBufferDiffHunk, MultiBufferRow,
12 MultiBufferSnapshot, ToPoint,
13};
14use settings::SettingsStore;
15use text::{BufferId, Point};
16use ui::{
17 prelude::*, ActiveTheme, ContextMenu, InteractiveElement, IntoElement, ParentElement, Pixels,
18 Styled, ViewContext, VisualContext,
19};
20use util::{debug_panic, RangeExt};
21
22use crate::{
23 editor_settings::CurrentLineHighlight,
24 git::{diff_hunk_to_display, DisplayDiffHunk},
25 hunk_status, hunks_for_selections,
26 mouse_context_menu::MouseContextMenu,
27 BlockDisposition, BlockProperties, BlockStyle, CustomBlockId, DiffRowHighlight, Editor,
28 EditorElement, EditorSnapshot, ExpandAllHunkDiffs, RangeToAnchorExt, RevertFile,
29 RevertSelectedHunks, ToDisplayPoint, ToggleHunkDiff,
30};
31
32#[derive(Debug, Clone)]
33pub(super) struct HoveredHunk {
34 pub multi_buffer_range: Range<Anchor>,
35 pub status: DiffHunkStatus,
36 pub diff_base_byte_range: Range<usize>,
37}
38
39#[derive(Debug, Default)]
40pub(super) struct ExpandedHunks {
41 pub(crate) hunks: Vec<ExpandedHunk>,
42 diff_base: HashMap<BufferId, DiffBaseBuffer>,
43 hunk_update_tasks: HashMap<Option<BufferId>, Task<()>>,
44}
45
46#[derive(Debug)]
47struct DiffBaseBuffer {
48 buffer: Model<Buffer>,
49 diff_base_version: usize,
50}
51
52impl ExpandedHunks {
53 pub fn hunks(&self, include_folded: bool) -> impl Iterator<Item = &ExpandedHunk> {
54 self.hunks
55 .iter()
56 .filter(move |hunk| include_folded || !hunk.folded)
57 }
58}
59
60#[derive(Debug, Clone)]
61pub(super) struct ExpandedHunk {
62 pub block: Option<CustomBlockId>,
63 pub hunk_range: Range<Anchor>,
64 pub diff_base_byte_range: Range<usize>,
65 pub status: DiffHunkStatus,
66 pub folded: bool,
67}
68
69impl Editor {
70 pub(super) fn open_hunk_context_menu(
71 &mut self,
72 hovered_hunk: HoveredHunk,
73 clicked_point: gpui::Point<Pixels>,
74 cx: &mut ViewContext<Editor>,
75 ) {
76 let focus_handle = self.focus_handle.clone();
77 let expanded = self
78 .expanded_hunks
79 .hunks(false)
80 .any(|expanded_hunk| expanded_hunk.hunk_range == hovered_hunk.multi_buffer_range);
81 let editor_handle = cx.view().clone();
82 let editor_snapshot = self.snapshot(cx);
83 let start_point = self
84 .to_pixel_point(hovered_hunk.multi_buffer_range.start, &editor_snapshot, cx)
85 .unwrap_or(clicked_point);
86 let end_point = self
87 .to_pixel_point(hovered_hunk.multi_buffer_range.start, &editor_snapshot, cx)
88 .unwrap_or(clicked_point);
89 let norm =
90 |a: gpui::Point<Pixels>, b: gpui::Point<Pixels>| (a.x - b.x).abs() + (a.y - b.y).abs();
91 let closest_source = if norm(start_point, clicked_point) < norm(end_point, clicked_point) {
92 hovered_hunk.multi_buffer_range.start
93 } else {
94 hovered_hunk.multi_buffer_range.end
95 };
96
97 self.mouse_context_menu = MouseContextMenu::pinned_to_editor(
98 self,
99 closest_source,
100 clicked_point,
101 ContextMenu::build(cx, move |menu, _| {
102 menu.on_blur_subscription(Subscription::new(|| {}))
103 .context(focus_handle)
104 .entry(
105 if expanded {
106 "Collapse Hunk"
107 } else {
108 "Expand Hunk"
109 },
110 Some(ToggleHunkDiff.boxed_clone()),
111 {
112 let editor = editor_handle.clone();
113 let hunk = hovered_hunk.clone();
114 move |cx| {
115 editor.update(cx, |editor, cx| {
116 editor.toggle_hovered_hunk(&hunk, cx);
117 });
118 }
119 },
120 )
121 .entry("Revert Hunk", Some(RevertSelectedHunks.boxed_clone()), {
122 let editor = editor_handle.clone();
123 let hunk = hovered_hunk.clone();
124 move |cx| {
125 let multi_buffer = editor.read(cx).buffer().clone();
126 let multi_buffer_snapshot = multi_buffer.read(cx).snapshot(cx);
127 let mut revert_changes = HashMap::default();
128 if let Some(hunk) =
129 crate::hunk_diff::to_diff_hunk(&hunk, &multi_buffer_snapshot)
130 {
131 Editor::prepare_revert_change(
132 &mut revert_changes,
133 &multi_buffer,
134 &hunk,
135 cx,
136 );
137 }
138 if !revert_changes.is_empty() {
139 editor.update(cx, |editor, cx| editor.revert(revert_changes, cx));
140 }
141 }
142 })
143 .action("Revert File", RevertFile.boxed_clone())
144 }),
145 cx,
146 )
147 }
148
149 pub(super) fn toggle_hovered_hunk(
150 &mut self,
151 hovered_hunk: &HoveredHunk,
152 cx: &mut ViewContext<Editor>,
153 ) {
154 let editor_snapshot = self.snapshot(cx);
155 if let Some(diff_hunk) = to_diff_hunk(hovered_hunk, &editor_snapshot.buffer_snapshot) {
156 self.toggle_hunks_expanded(vec![diff_hunk], cx);
157 self.change_selections(None, cx, |selections| selections.refresh());
158 }
159 }
160
161 pub fn toggle_hunk_diff(&mut self, _: &ToggleHunkDiff, cx: &mut ViewContext<Self>) {
162 let multi_buffer_snapshot = self.buffer().read(cx).snapshot(cx);
163 let selections = self.selections.disjoint_anchors();
164 self.toggle_hunks_expanded(
165 hunks_for_selections(&multi_buffer_snapshot, &selections),
166 cx,
167 );
168 }
169
170 pub fn expand_all_hunk_diffs(&mut self, _: &ExpandAllHunkDiffs, cx: &mut ViewContext<Self>) {
171 let snapshot = self.snapshot(cx);
172 let display_rows_with_expanded_hunks = self
173 .expanded_hunks
174 .hunks(false)
175 .map(|hunk| &hunk.hunk_range)
176 .map(|anchor_range| {
177 (
178 anchor_range
179 .start
180 .to_display_point(&snapshot.display_snapshot)
181 .row(),
182 anchor_range
183 .end
184 .to_display_point(&snapshot.display_snapshot)
185 .row(),
186 )
187 })
188 .collect::<HashMap<_, _>>();
189 let hunks = snapshot
190 .display_snapshot
191 .buffer_snapshot
192 .git_diff_hunks_in_range(MultiBufferRow::MIN..MultiBufferRow::MAX)
193 .filter(|hunk| {
194 let hunk_display_row_range = Point::new(hunk.row_range.start.0, 0)
195 .to_display_point(&snapshot.display_snapshot)
196 ..Point::new(hunk.row_range.end.0, 0)
197 .to_display_point(&snapshot.display_snapshot);
198 let row_range_end =
199 display_rows_with_expanded_hunks.get(&hunk_display_row_range.start.row());
200 row_range_end.is_none() || row_range_end != Some(&hunk_display_row_range.end.row())
201 });
202 self.toggle_hunks_expanded(hunks.collect(), cx);
203 }
204
205 fn toggle_hunks_expanded(
206 &mut self,
207 hunks_to_toggle: Vec<MultiBufferDiffHunk>,
208 cx: &mut ViewContext<Self>,
209 ) {
210 let previous_toggle_task = self.expanded_hunks.hunk_update_tasks.remove(&None);
211 let new_toggle_task = cx.spawn(move |editor, mut cx| async move {
212 if let Some(task) = previous_toggle_task {
213 task.await;
214 }
215
216 editor
217 .update(&mut cx, |editor, cx| {
218 let snapshot = editor.snapshot(cx);
219 let mut hunks_to_toggle = hunks_to_toggle.into_iter().fuse().peekable();
220 let mut highlights_to_remove =
221 Vec::with_capacity(editor.expanded_hunks.hunks.len());
222 let mut blocks_to_remove = HashSet::default();
223 let mut hunks_to_expand = Vec::new();
224 editor.expanded_hunks.hunks.retain(|expanded_hunk| {
225 if expanded_hunk.folded {
226 return true;
227 }
228 let expanded_hunk_row_range = expanded_hunk
229 .hunk_range
230 .start
231 .to_display_point(&snapshot)
232 .row()
233 ..expanded_hunk
234 .hunk_range
235 .end
236 .to_display_point(&snapshot)
237 .row();
238 let mut retain = true;
239 while let Some(hunk_to_toggle) = hunks_to_toggle.peek() {
240 match diff_hunk_to_display(hunk_to_toggle, &snapshot) {
241 DisplayDiffHunk::Folded { .. } => {
242 hunks_to_toggle.next();
243 continue;
244 }
245 DisplayDiffHunk::Unfolded {
246 diff_base_byte_range,
247 display_row_range,
248 multi_buffer_range,
249 status,
250 } => {
251 let hunk_to_toggle_row_range = display_row_range;
252 if hunk_to_toggle_row_range.start > expanded_hunk_row_range.end
253 {
254 break;
255 } else if expanded_hunk_row_range == hunk_to_toggle_row_range {
256 highlights_to_remove.push(expanded_hunk.hunk_range.clone());
257 blocks_to_remove.extend(expanded_hunk.block);
258 hunks_to_toggle.next();
259 retain = false;
260 break;
261 } else {
262 hunks_to_expand.push(HoveredHunk {
263 status,
264 multi_buffer_range,
265 diff_base_byte_range,
266 });
267 hunks_to_toggle.next();
268 continue;
269 }
270 }
271 }
272 }
273
274 retain
275 });
276 for remaining_hunk in hunks_to_toggle {
277 let remaining_hunk_point_range =
278 Point::new(remaining_hunk.row_range.start.0, 0)
279 ..Point::new(remaining_hunk.row_range.end.0, 0);
280 hunks_to_expand.push(HoveredHunk {
281 status: hunk_status(&remaining_hunk),
282 multi_buffer_range: remaining_hunk_point_range
283 .to_anchors(&snapshot.buffer_snapshot),
284 diff_base_byte_range: remaining_hunk.diff_base_byte_range.clone(),
285 });
286 }
287
288 for removed_rows in highlights_to_remove {
289 editor.highlight_rows::<DiffRowHighlight>(
290 to_inclusive_row_range(removed_rows, &snapshot),
291 None,
292 false,
293 cx,
294 );
295 }
296 editor.remove_blocks(blocks_to_remove, None, cx);
297 for hunk in hunks_to_expand {
298 editor.expand_diff_hunk(None, &hunk, cx);
299 }
300 cx.notify();
301 })
302 .ok();
303 });
304
305 self.expanded_hunks
306 .hunk_update_tasks
307 .insert(None, cx.background_executor().spawn(new_toggle_task));
308 }
309
310 pub(super) fn expand_diff_hunk(
311 &mut self,
312 diff_base_buffer: Option<Model<Buffer>>,
313 hunk: &HoveredHunk,
314 cx: &mut ViewContext<'_, Editor>,
315 ) -> Option<()> {
316 let multi_buffer_snapshot = self.buffer().read(cx).snapshot(cx);
317 let multi_buffer_row_range = hunk
318 .multi_buffer_range
319 .start
320 .to_point(&multi_buffer_snapshot)
321 ..hunk.multi_buffer_range.end.to_point(&multi_buffer_snapshot);
322 let hunk_start = hunk.multi_buffer_range.start;
323 let hunk_end = hunk.multi_buffer_range.end;
324
325 let buffer = self.buffer().clone();
326 let snapshot = self.snapshot(cx);
327 let (diff_base_buffer, deleted_text_lines) = buffer.update(cx, |buffer, cx| {
328 let hunk = buffer_diff_hunk(&snapshot.buffer_snapshot, multi_buffer_row_range.clone())?;
329 let mut buffer_ranges = buffer.range_to_buffer_ranges(multi_buffer_row_range, cx);
330 if buffer_ranges.len() == 1 {
331 let (buffer, _, _) = buffer_ranges.pop()?;
332 let diff_base_buffer = diff_base_buffer
333 .or_else(|| self.current_diff_base_buffer(&buffer, cx))
334 .or_else(|| create_diff_base_buffer(&buffer, cx))?;
335 let buffer = buffer.read(cx);
336 let deleted_text_lines = buffer.diff_base().map(|diff_base| {
337 let diff_start_row = diff_base
338 .offset_to_point(hunk.diff_base_byte_range.start)
339 .row;
340 let diff_end_row = diff_base.offset_to_point(hunk.diff_base_byte_range.end).row;
341
342 diff_end_row - diff_start_row
343 })?;
344 Some((diff_base_buffer, deleted_text_lines))
345 } else {
346 None
347 }
348 })?;
349
350 let block_insert_index = match self.expanded_hunks.hunks.binary_search_by(|probe| {
351 probe
352 .hunk_range
353 .start
354 .cmp(&hunk_start, &multi_buffer_snapshot)
355 }) {
356 Ok(_already_present) => return None,
357 Err(ix) => ix,
358 };
359
360 let block = match hunk.status {
361 DiffHunkStatus::Removed => {
362 self.insert_deleted_text_block(diff_base_buffer, deleted_text_lines, hunk, cx)
363 }
364 DiffHunkStatus::Added => {
365 self.highlight_rows::<DiffRowHighlight>(
366 to_inclusive_row_range(hunk_start..hunk_end, &snapshot),
367 Some(added_hunk_color(cx)),
368 false,
369 cx,
370 );
371 None
372 }
373 DiffHunkStatus::Modified => {
374 self.highlight_rows::<DiffRowHighlight>(
375 to_inclusive_row_range(hunk_start..hunk_end, &snapshot),
376 Some(added_hunk_color(cx)),
377 false,
378 cx,
379 );
380 self.insert_deleted_text_block(diff_base_buffer, deleted_text_lines, hunk, cx)
381 }
382 };
383 self.expanded_hunks.hunks.insert(
384 block_insert_index,
385 ExpandedHunk {
386 block,
387 hunk_range: hunk_start..hunk_end,
388 status: hunk.status,
389 folded: false,
390 diff_base_byte_range: hunk.diff_base_byte_range.clone(),
391 },
392 );
393
394 Some(())
395 }
396
397 fn insert_deleted_text_block(
398 &mut self,
399 diff_base_buffer: Model<Buffer>,
400 deleted_text_height: u32,
401 hunk: &HoveredHunk,
402 cx: &mut ViewContext<'_, Self>,
403 ) -> Option<CustomBlockId> {
404 let deleted_hunk_color = deleted_hunk_color(cx);
405 let (editor_height, editor_with_deleted_text) =
406 editor_with_deleted_text(diff_base_buffer, deleted_hunk_color, hunk, cx);
407 let editor = cx.view().clone();
408 let hunk = hunk.clone();
409 let height = editor_height.max(deleted_text_height);
410 let mut new_block_ids = self.insert_blocks(
411 Some(BlockProperties {
412 position: hunk.multi_buffer_range.start,
413 height,
414 style: BlockStyle::Flex,
415 disposition: BlockDisposition::Above,
416 render: Box::new(move |cx| {
417 let width = EditorElement::diff_hunk_strip_width(cx.line_height());
418 let gutter_dimensions = editor.read(cx.context).gutter_dimensions;
419
420 let close_button = editor.update(cx.context, |editor, cx| {
421 let editor_snapshot = editor.snapshot(cx);
422 let hunk_display_range = hunk
423 .multi_buffer_range
424 .clone()
425 .to_display_points(&editor_snapshot);
426 editor.close_hunk_diff_button(
427 hunk.clone(),
428 hunk_display_range.start.row(),
429 cx,
430 )
431 });
432
433 h_flex()
434 .id("gutter with editor")
435 .bg(deleted_hunk_color)
436 .h(height as f32 * cx.line_height())
437 .w_full()
438 .child(
439 h_flex()
440 .id("gutter")
441 .max_w(gutter_dimensions.full_width())
442 .min_w(gutter_dimensions.full_width())
443 .size_full()
444 .child(
445 h_flex()
446 .id("gutter hunk")
447 .bg(cx.theme().status().deleted)
448 .pl(gutter_dimensions.margin
449 + gutter_dimensions
450 .git_blame_entries_width
451 .unwrap_or_default())
452 .max_w(width)
453 .min_w(width)
454 .size_full()
455 .cursor(CursorStyle::PointingHand)
456 .on_mouse_down(MouseButton::Left, {
457 let editor = editor.clone();
458 let hunk = hunk.clone();
459 move |event, cx| {
460 let modifiers = event.modifiers;
461 if modifiers.control || modifiers.platform {
462 editor.update(cx, |editor, cx| {
463 editor.toggle_hovered_hunk(&hunk, cx);
464 });
465 } else {
466 editor.update(cx, |editor, cx| {
467 editor.open_hunk_context_menu(
468 hunk.clone(),
469 event.position,
470 cx,
471 );
472 });
473 }
474 }
475 }),
476 )
477 .child(
478 v_flex()
479 .size_full()
480 .pt(rems(0.25))
481 .justify_start()
482 .child(close_button),
483 ),
484 )
485 .child(editor_with_deleted_text.clone())
486 .into_any_element()
487 }),
488 priority: 0,
489 }),
490 None,
491 cx,
492 );
493 if new_block_ids.len() == 1 {
494 new_block_ids.pop()
495 } else {
496 debug_panic!(
497 "Inserted one editor block but did not receive exactly one block id: {new_block_ids:?}"
498 );
499 None
500 }
501 }
502
503 pub(super) fn clear_clicked_diff_hunks(&mut self, cx: &mut ViewContext<'_, Editor>) -> bool {
504 self.expanded_hunks.hunk_update_tasks.clear();
505 self.clear_row_highlights::<DiffRowHighlight>();
506 let to_remove = self
507 .expanded_hunks
508 .hunks
509 .drain(..)
510 .filter_map(|expanded_hunk| expanded_hunk.block)
511 .collect::<HashSet<_>>();
512 if to_remove.is_empty() {
513 false
514 } else {
515 self.remove_blocks(to_remove, None, cx);
516 true
517 }
518 }
519
520 pub(super) fn sync_expanded_diff_hunks(
521 &mut self,
522 buffer: Model<Buffer>,
523 cx: &mut ViewContext<'_, Self>,
524 ) {
525 let buffer_id = buffer.read(cx).remote_id();
526 let buffer_diff_base_version = buffer.read(cx).diff_base_version();
527 self.expanded_hunks
528 .hunk_update_tasks
529 .remove(&Some(buffer_id));
530 let diff_base_buffer = self.current_diff_base_buffer(&buffer, cx);
531 let new_sync_task = cx.spawn(move |editor, mut cx| async move {
532 let diff_base_buffer_unchanged = diff_base_buffer.is_some();
533 let Ok(diff_base_buffer) =
534 cx.update(|cx| diff_base_buffer.or_else(|| create_diff_base_buffer(&buffer, cx)))
535 else {
536 return;
537 };
538 editor
539 .update(&mut cx, |editor, cx| {
540 if let Some(diff_base_buffer) = &diff_base_buffer {
541 editor.expanded_hunks.diff_base.insert(
542 buffer_id,
543 DiffBaseBuffer {
544 buffer: diff_base_buffer.clone(),
545 diff_base_version: buffer_diff_base_version,
546 },
547 );
548 }
549
550 let snapshot = editor.snapshot(cx);
551 let mut recalculated_hunks = snapshot
552 .buffer_snapshot
553 .git_diff_hunks_in_range(MultiBufferRow::MIN..MultiBufferRow::MAX)
554 .filter(|hunk| hunk.buffer_id == buffer_id)
555 .fuse()
556 .peekable();
557 let mut highlights_to_remove =
558 Vec::with_capacity(editor.expanded_hunks.hunks.len());
559 let mut blocks_to_remove = HashSet::default();
560 let mut hunks_to_reexpand =
561 Vec::with_capacity(editor.expanded_hunks.hunks.len());
562 editor.expanded_hunks.hunks.retain_mut(|expanded_hunk| {
563 if expanded_hunk.hunk_range.start.buffer_id != Some(buffer_id) {
564 return true;
565 };
566
567 let mut retain = false;
568 if diff_base_buffer_unchanged {
569 let expanded_hunk_display_range = expanded_hunk
570 .hunk_range
571 .start
572 .to_display_point(&snapshot)
573 .row()
574 ..expanded_hunk
575 .hunk_range
576 .end
577 .to_display_point(&snapshot)
578 .row();
579 while let Some(buffer_hunk) = recalculated_hunks.peek() {
580 match diff_hunk_to_display(buffer_hunk, &snapshot) {
581 DisplayDiffHunk::Folded { display_row } => {
582 recalculated_hunks.next();
583 if !expanded_hunk.folded
584 && expanded_hunk_display_range
585 .to_inclusive()
586 .contains(&display_row)
587 {
588 retain = true;
589 expanded_hunk.folded = true;
590 highlights_to_remove
591 .push(expanded_hunk.hunk_range.clone());
592 if let Some(block) = expanded_hunk.block.take() {
593 blocks_to_remove.insert(block);
594 }
595 break;
596 } else {
597 continue;
598 }
599 }
600 DisplayDiffHunk::Unfolded {
601 diff_base_byte_range,
602 display_row_range,
603 multi_buffer_range,
604 status,
605 } => {
606 let hunk_display_range = display_row_range;
607 if expanded_hunk_display_range.start
608 > hunk_display_range.end
609 {
610 recalculated_hunks.next();
611 continue;
612 } else if expanded_hunk_display_range.end
613 < hunk_display_range.start
614 {
615 break;
616 } else {
617 if !expanded_hunk.folded
618 && expanded_hunk_display_range == hunk_display_range
619 && expanded_hunk.status == hunk_status(buffer_hunk)
620 && expanded_hunk.diff_base_byte_range
621 == buffer_hunk.diff_base_byte_range
622 {
623 recalculated_hunks.next();
624 retain = true;
625 } else {
626 hunks_to_reexpand.push(HoveredHunk {
627 status,
628 multi_buffer_range,
629 diff_base_byte_range,
630 });
631 }
632 break;
633 }
634 }
635 }
636 }
637 }
638 if !retain {
639 blocks_to_remove.extend(expanded_hunk.block);
640 highlights_to_remove.push(expanded_hunk.hunk_range.clone());
641 }
642 retain
643 });
644
645 for removed_rows in highlights_to_remove {
646 editor.highlight_rows::<DiffRowHighlight>(
647 to_inclusive_row_range(removed_rows, &snapshot),
648 None,
649 false,
650 cx,
651 );
652 }
653 editor.remove_blocks(blocks_to_remove, None, cx);
654
655 if let Some(diff_base_buffer) = &diff_base_buffer {
656 for hunk in hunks_to_reexpand {
657 editor.expand_diff_hunk(Some(diff_base_buffer.clone()), &hunk, cx);
658 }
659 }
660 })
661 .ok();
662 });
663
664 self.expanded_hunks.hunk_update_tasks.insert(
665 Some(buffer_id),
666 cx.background_executor().spawn(new_sync_task),
667 );
668 }
669
670 fn current_diff_base_buffer(
671 &mut self,
672 buffer: &Model<Buffer>,
673 cx: &mut AppContext,
674 ) -> Option<Model<Buffer>> {
675 buffer.update(cx, |buffer, _| {
676 match self.expanded_hunks.diff_base.entry(buffer.remote_id()) {
677 hash_map::Entry::Occupied(o) => {
678 if o.get().diff_base_version != buffer.diff_base_version() {
679 o.remove();
680 None
681 } else {
682 Some(o.get().buffer.clone())
683 }
684 }
685 hash_map::Entry::Vacant(_) => None,
686 }
687 })
688 }
689}
690
691fn to_diff_hunk(
692 hovered_hunk: &HoveredHunk,
693 multi_buffer_snapshot: &MultiBufferSnapshot,
694) -> Option<MultiBufferDiffHunk> {
695 let buffer_id = hovered_hunk
696 .multi_buffer_range
697 .start
698 .buffer_id
699 .or(hovered_hunk.multi_buffer_range.end.buffer_id)?;
700 let buffer_range = hovered_hunk.multi_buffer_range.start.text_anchor
701 ..hovered_hunk.multi_buffer_range.end.text_anchor;
702 let point_range = hovered_hunk
703 .multi_buffer_range
704 .to_point(multi_buffer_snapshot);
705 Some(MultiBufferDiffHunk {
706 row_range: MultiBufferRow(point_range.start.row)..MultiBufferRow(point_range.end.row),
707 buffer_id,
708 buffer_range,
709 diff_base_byte_range: hovered_hunk.diff_base_byte_range.clone(),
710 })
711}
712
713fn create_diff_base_buffer(buffer: &Model<Buffer>, cx: &mut AppContext) -> Option<Model<Buffer>> {
714 buffer
715 .update(cx, |buffer, _| {
716 let language = buffer.language().cloned();
717 let diff_base = buffer.diff_base()?.clone();
718 Some((buffer.line_ending(), diff_base, language))
719 })
720 .map(|(line_ending, diff_base, language)| {
721 cx.new_model(|cx| {
722 let buffer = Buffer::local_normalized(diff_base, line_ending, cx);
723 match language {
724 Some(language) => buffer.with_language(language, cx),
725 None => buffer,
726 }
727 })
728 })
729}
730
731fn added_hunk_color(cx: &AppContext) -> Hsla {
732 let mut created_color = cx.theme().status().git().created;
733 created_color.fade_out(0.7);
734 created_color
735}
736
737fn deleted_hunk_color(cx: &AppContext) -> Hsla {
738 let mut deleted_color = cx.theme().status().git().deleted;
739 deleted_color.fade_out(0.7);
740 deleted_color
741}
742
743fn editor_with_deleted_text(
744 diff_base_buffer: Model<Buffer>,
745 deleted_color: Hsla,
746 hunk: &HoveredHunk,
747 cx: &mut ViewContext<'_, Editor>,
748) -> (u32, View<Editor>) {
749 let parent_editor = cx.view().downgrade();
750 let editor = cx.new_view(|cx| {
751 let multi_buffer =
752 cx.new_model(|_| MultiBuffer::without_headers(language::Capability::ReadOnly));
753 multi_buffer.update(cx, |multi_buffer, cx| {
754 multi_buffer.push_excerpts(
755 diff_base_buffer,
756 Some(ExcerptRange {
757 context: hunk.diff_base_byte_range.clone(),
758 primary: None,
759 }),
760 cx,
761 );
762 });
763
764 let mut editor = Editor::for_multibuffer(multi_buffer, None, true, cx);
765 editor.set_soft_wrap_mode(language::language_settings::SoftWrap::None, cx);
766 editor.set_show_wrap_guides(false, cx);
767 editor.set_show_gutter(false, cx);
768 editor.scroll_manager.set_forbid_vertical_scroll(true);
769 editor.set_read_only(true);
770 editor.set_show_inline_completions(Some(false), cx);
771 editor.highlight_rows::<DiffRowHighlight>(
772 Anchor::min()..=Anchor::max(),
773 Some(deleted_color),
774 false,
775 cx,
776 );
777
778 let subscription_editor = parent_editor.clone();
779 editor._subscriptions.extend([
780 cx.on_blur(&editor.focus_handle, |editor, cx| {
781 editor.set_current_line_highlight(Some(CurrentLineHighlight::None));
782 editor.change_selections(None, cx, |s| {
783 s.try_cancel();
784 });
785 cx.notify();
786 }),
787 cx.on_focus(&editor.focus_handle, move |editor, cx| {
788 let restored_highlight = if let Some(parent_editor) = subscription_editor.upgrade()
789 {
790 parent_editor.read(cx).current_line_highlight
791 } else {
792 None
793 };
794 editor.set_current_line_highlight(restored_highlight);
795 cx.notify();
796 }),
797 cx.observe_global::<SettingsStore>(|editor, cx| {
798 if !editor.is_focused(cx) {
799 editor.set_current_line_highlight(Some(CurrentLineHighlight::None));
800 }
801 }),
802 ]);
803 let parent_editor_for_reverts = parent_editor.clone();
804 let original_multi_buffer_range = hunk.multi_buffer_range.clone();
805 let diff_base_range = hunk.diff_base_byte_range.clone();
806 editor
807 .register_action::<RevertSelectedHunks>(move |_, cx| {
808 parent_editor_for_reverts
809 .update(cx, |editor, cx| {
810 let Some((buffer, original_text)) =
811 editor.buffer().update(cx, |buffer, cx| {
812 let (_, buffer, _) = buffer
813 .excerpt_containing(original_multi_buffer_range.start, cx)?;
814 let original_text =
815 buffer.read(cx).diff_base()?.slice(diff_base_range.clone());
816 Some((buffer, Arc::from(original_text.to_string())))
817 })
818 else {
819 return;
820 };
821 buffer.update(cx, |buffer, cx| {
822 buffer.edit(
823 Some((
824 original_multi_buffer_range.start.text_anchor
825 ..original_multi_buffer_range.end.text_anchor,
826 original_text,
827 )),
828 None,
829 cx,
830 )
831 });
832 })
833 .ok();
834 })
835 .detach();
836 let hunk = hunk.clone();
837 editor
838 .register_action::<ToggleHunkDiff>(move |_, cx| {
839 parent_editor
840 .update(cx, |editor, cx| {
841 editor.toggle_hovered_hunk(&hunk, cx);
842 })
843 .ok();
844 })
845 .detach();
846 editor
847 });
848
849 let editor_height = editor.update(cx, |editor, cx| editor.max_point(cx).row().0);
850 (editor_height, editor)
851}
852
853fn buffer_diff_hunk(
854 buffer_snapshot: &MultiBufferSnapshot,
855 row_range: Range<Point>,
856) -> Option<MultiBufferDiffHunk> {
857 let mut hunks = buffer_snapshot.git_diff_hunks_in_range(
858 MultiBufferRow(row_range.start.row)..MultiBufferRow(row_range.end.row),
859 );
860 let hunk = hunks.next()?;
861 let second_hunk = hunks.next();
862 if second_hunk.is_none() {
863 return Some(hunk);
864 }
865 None
866}
867
868fn to_inclusive_row_range(
869 row_range: Range<Anchor>,
870 snapshot: &EditorSnapshot,
871) -> RangeInclusive<Anchor> {
872 let mut display_row_range =
873 row_range.start.to_display_point(snapshot)..row_range.end.to_display_point(snapshot);
874 if display_row_range.end.row() > display_row_range.start.row() {
875 *display_row_range.end.row_mut() -= 1;
876 }
877 let point_range = display_row_range.start.to_point(&snapshot.display_snapshot)
878 ..display_row_range.end.to_point(&snapshot.display_snapshot);
879 let new_range = point_range.to_anchors(&snapshot.buffer_snapshot);
880 new_range.start..=new_range.end
881}