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: snapshot
283 .buffer_snapshot
284 .anchor_before(remaining_hunk_point_range.start)
285 ..snapshot
286 .buffer_snapshot
287 .anchor_after(remaining_hunk_point_range.end),
288 diff_base_byte_range: remaining_hunk.diff_base_byte_range.clone(),
289 });
290 }
291
292 for removed_rows in highlights_to_remove {
293 editor.highlight_rows::<DiffRowHighlight>(
294 to_inclusive_row_range(removed_rows, &snapshot),
295 None,
296 false,
297 cx,
298 );
299 }
300 editor.remove_blocks(blocks_to_remove, None, cx);
301 for hunk in hunks_to_expand {
302 editor.expand_diff_hunk(None, &hunk, cx);
303 }
304 cx.notify();
305 })
306 .ok();
307 });
308
309 self.expanded_hunks
310 .hunk_update_tasks
311 .insert(None, cx.background_executor().spawn(new_toggle_task));
312 }
313
314 pub(super) fn expand_diff_hunk(
315 &mut self,
316 diff_base_buffer: Option<Model<Buffer>>,
317 hunk: &HoveredHunk,
318 cx: &mut ViewContext<'_, Editor>,
319 ) -> Option<()> {
320 let multi_buffer_snapshot = self.buffer().read(cx).snapshot(cx);
321 let multi_buffer_row_range = hunk
322 .multi_buffer_range
323 .start
324 .to_point(&multi_buffer_snapshot)
325 ..hunk.multi_buffer_range.end.to_point(&multi_buffer_snapshot);
326 let hunk_start = hunk.multi_buffer_range.start;
327 let hunk_end = hunk.multi_buffer_range.end;
328
329 let buffer = self.buffer().clone();
330 let snapshot = self.snapshot(cx);
331 let (diff_base_buffer, deleted_text_lines) = buffer.update(cx, |buffer, cx| {
332 let hunk = buffer_diff_hunk(&snapshot.buffer_snapshot, multi_buffer_row_range.clone())?;
333 let mut buffer_ranges = buffer.range_to_buffer_ranges(multi_buffer_row_range, cx);
334 if buffer_ranges.len() == 1 {
335 let (buffer, _, _) = buffer_ranges.pop()?;
336 let diff_base_buffer = diff_base_buffer
337 .or_else(|| self.current_diff_base_buffer(&buffer, cx))
338 .or_else(|| create_diff_base_buffer(&buffer, cx))?;
339 let buffer = buffer.read(cx);
340 let deleted_text_lines = buffer.diff_base().map(|diff_base| {
341 let diff_start_row = diff_base
342 .offset_to_point(hunk.diff_base_byte_range.start)
343 .row;
344 let diff_end_row = diff_base.offset_to_point(hunk.diff_base_byte_range.end).row;
345
346 diff_end_row - diff_start_row
347 })?;
348 Some((diff_base_buffer, deleted_text_lines))
349 } else {
350 None
351 }
352 })?;
353
354 let block_insert_index = match self.expanded_hunks.hunks.binary_search_by(|probe| {
355 probe
356 .hunk_range
357 .start
358 .cmp(&hunk_start, &multi_buffer_snapshot)
359 }) {
360 Ok(_already_present) => return None,
361 Err(ix) => ix,
362 };
363
364 let block = match hunk.status {
365 DiffHunkStatus::Removed => {
366 self.insert_deleted_text_block(diff_base_buffer, deleted_text_lines, hunk, cx)
367 }
368 DiffHunkStatus::Added => {
369 self.highlight_rows::<DiffRowHighlight>(
370 to_inclusive_row_range(hunk_start..hunk_end, &snapshot),
371 Some(added_hunk_color(cx)),
372 false,
373 cx,
374 );
375 None
376 }
377 DiffHunkStatus::Modified => {
378 self.highlight_rows::<DiffRowHighlight>(
379 to_inclusive_row_range(hunk_start..hunk_end, &snapshot),
380 Some(added_hunk_color(cx)),
381 false,
382 cx,
383 );
384 self.insert_deleted_text_block(diff_base_buffer, deleted_text_lines, hunk, cx)
385 }
386 };
387 self.expanded_hunks.hunks.insert(
388 block_insert_index,
389 ExpandedHunk {
390 block,
391 hunk_range: hunk_start..hunk_end,
392 status: hunk.status,
393 folded: false,
394 diff_base_byte_range: hunk.diff_base_byte_range.clone(),
395 },
396 );
397
398 Some(())
399 }
400
401 fn insert_deleted_text_block(
402 &mut self,
403 diff_base_buffer: Model<Buffer>,
404 deleted_text_height: u32,
405 hunk: &HoveredHunk,
406 cx: &mut ViewContext<'_, Self>,
407 ) -> Option<CustomBlockId> {
408 let deleted_hunk_color = deleted_hunk_color(cx);
409 let (editor_height, editor_with_deleted_text) =
410 editor_with_deleted_text(diff_base_buffer, deleted_hunk_color, hunk, cx);
411 let editor = cx.view().clone();
412 let hunk = hunk.clone();
413 let height = editor_height.max(deleted_text_height);
414 let mut new_block_ids = self.insert_blocks(
415 Some(BlockProperties {
416 position: hunk.multi_buffer_range.start,
417 height,
418 style: BlockStyle::Flex,
419 disposition: BlockDisposition::Above,
420 render: Box::new(move |cx| {
421 let width = EditorElement::diff_hunk_strip_width(cx.line_height());
422 let gutter_dimensions = editor.read(cx.context).gutter_dimensions;
423
424 let close_button = editor.update(cx.context, |editor, cx| {
425 let editor_snapshot = editor.snapshot(cx);
426 let hunk_display_range = hunk
427 .multi_buffer_range
428 .clone()
429 .to_display_points(&editor_snapshot);
430 editor.close_hunk_diff_button(
431 hunk.clone(),
432 hunk_display_range.start.row(),
433 cx,
434 )
435 });
436
437 h_flex()
438 .id("gutter with editor")
439 .bg(deleted_hunk_color)
440 .h(height as f32 * cx.line_height())
441 .w_full()
442 .child(
443 h_flex()
444 .id("gutter")
445 .max_w(gutter_dimensions.full_width())
446 .min_w(gutter_dimensions.full_width())
447 .size_full()
448 .child(
449 h_flex()
450 .id("gutter hunk")
451 .bg(cx.theme().status().deleted)
452 .pl(gutter_dimensions.margin
453 + gutter_dimensions
454 .git_blame_entries_width
455 .unwrap_or_default())
456 .max_w(width)
457 .min_w(width)
458 .size_full()
459 .cursor(CursorStyle::PointingHand)
460 .on_mouse_down(MouseButton::Left, {
461 let editor = editor.clone();
462 let hunk = hunk.clone();
463 move |event, cx| {
464 let modifiers = event.modifiers;
465 if modifiers.control || modifiers.platform {
466 editor.update(cx, |editor, cx| {
467 editor.toggle_hovered_hunk(&hunk, cx);
468 });
469 } else {
470 editor.update(cx, |editor, cx| {
471 editor.open_hunk_context_menu(
472 hunk.clone(),
473 event.position,
474 cx,
475 );
476 });
477 }
478 }
479 }),
480 )
481 .child(
482 v_flex()
483 .size_full()
484 .pt(rems(0.25))
485 .justify_start()
486 .child(close_button),
487 ),
488 )
489 .child(editor_with_deleted_text.clone())
490 .into_any_element()
491 }),
492 priority: 0,
493 }),
494 None,
495 cx,
496 );
497 if new_block_ids.len() == 1 {
498 new_block_ids.pop()
499 } else {
500 debug_panic!(
501 "Inserted one editor block but did not receive exactly one block id: {new_block_ids:?}"
502 );
503 None
504 }
505 }
506
507 pub(super) fn clear_clicked_diff_hunks(&mut self, cx: &mut ViewContext<'_, Editor>) -> bool {
508 self.expanded_hunks.hunk_update_tasks.clear();
509 self.clear_row_highlights::<DiffRowHighlight>();
510 let to_remove = self
511 .expanded_hunks
512 .hunks
513 .drain(..)
514 .filter_map(|expanded_hunk| expanded_hunk.block)
515 .collect::<HashSet<_>>();
516 if to_remove.is_empty() {
517 false
518 } else {
519 self.remove_blocks(to_remove, None, cx);
520 true
521 }
522 }
523
524 pub(super) fn sync_expanded_diff_hunks(
525 &mut self,
526 buffer: Model<Buffer>,
527 cx: &mut ViewContext<'_, Self>,
528 ) {
529 let buffer_id = buffer.read(cx).remote_id();
530 let buffer_diff_base_version = buffer.read(cx).diff_base_version();
531 self.expanded_hunks
532 .hunk_update_tasks
533 .remove(&Some(buffer_id));
534 let diff_base_buffer = self.current_diff_base_buffer(&buffer, cx);
535 let new_sync_task = cx.spawn(move |editor, mut cx| async move {
536 let diff_base_buffer_unchanged = diff_base_buffer.is_some();
537 let Ok(diff_base_buffer) =
538 cx.update(|cx| diff_base_buffer.or_else(|| create_diff_base_buffer(&buffer, cx)))
539 else {
540 return;
541 };
542 editor
543 .update(&mut cx, |editor, cx| {
544 if let Some(diff_base_buffer) = &diff_base_buffer {
545 editor.expanded_hunks.diff_base.insert(
546 buffer_id,
547 DiffBaseBuffer {
548 buffer: diff_base_buffer.clone(),
549 diff_base_version: buffer_diff_base_version,
550 },
551 );
552 }
553
554 let snapshot = editor.snapshot(cx);
555 let mut recalculated_hunks = snapshot
556 .buffer_snapshot
557 .git_diff_hunks_in_range(MultiBufferRow::MIN..MultiBufferRow::MAX)
558 .filter(|hunk| hunk.buffer_id == buffer_id)
559 .fuse()
560 .peekable();
561 let mut highlights_to_remove =
562 Vec::with_capacity(editor.expanded_hunks.hunks.len());
563 let mut blocks_to_remove = HashSet::default();
564 let mut hunks_to_reexpand =
565 Vec::with_capacity(editor.expanded_hunks.hunks.len());
566 editor.expanded_hunks.hunks.retain_mut(|expanded_hunk| {
567 if expanded_hunk.hunk_range.start.buffer_id != Some(buffer_id) {
568 return true;
569 };
570
571 let mut retain = false;
572 if diff_base_buffer_unchanged {
573 let expanded_hunk_display_range = expanded_hunk
574 .hunk_range
575 .start
576 .to_display_point(&snapshot)
577 .row()
578 ..expanded_hunk
579 .hunk_range
580 .end
581 .to_display_point(&snapshot)
582 .row();
583 while let Some(buffer_hunk) = recalculated_hunks.peek() {
584 match diff_hunk_to_display(buffer_hunk, &snapshot) {
585 DisplayDiffHunk::Folded { display_row } => {
586 recalculated_hunks.next();
587 if !expanded_hunk.folded
588 && expanded_hunk_display_range
589 .to_inclusive()
590 .contains(&display_row)
591 {
592 retain = true;
593 expanded_hunk.folded = true;
594 highlights_to_remove
595 .push(expanded_hunk.hunk_range.clone());
596 if let Some(block) = expanded_hunk.block.take() {
597 blocks_to_remove.insert(block);
598 }
599 break;
600 } else {
601 continue;
602 }
603 }
604 DisplayDiffHunk::Unfolded {
605 diff_base_byte_range,
606 display_row_range,
607 multi_buffer_range,
608 status,
609 } => {
610 let hunk_display_range = display_row_range;
611 if expanded_hunk_display_range.start
612 > hunk_display_range.end
613 {
614 recalculated_hunks.next();
615 continue;
616 } else if expanded_hunk_display_range.end
617 < hunk_display_range.start
618 {
619 break;
620 } else {
621 if !expanded_hunk.folded
622 && expanded_hunk_display_range == hunk_display_range
623 && expanded_hunk.status == hunk_status(buffer_hunk)
624 && expanded_hunk.diff_base_byte_range
625 == buffer_hunk.diff_base_byte_range
626 {
627 recalculated_hunks.next();
628 retain = true;
629 } else {
630 hunks_to_reexpand.push(HoveredHunk {
631 status,
632 multi_buffer_range,
633 diff_base_byte_range,
634 });
635 }
636 break;
637 }
638 }
639 }
640 }
641 }
642 if !retain {
643 blocks_to_remove.extend(expanded_hunk.block);
644 highlights_to_remove.push(expanded_hunk.hunk_range.clone());
645 }
646 retain
647 });
648
649 for removed_rows in highlights_to_remove {
650 editor.highlight_rows::<DiffRowHighlight>(
651 to_inclusive_row_range(removed_rows, &snapshot),
652 None,
653 false,
654 cx,
655 );
656 }
657 editor.remove_blocks(blocks_to_remove, None, cx);
658
659 if let Some(diff_base_buffer) = &diff_base_buffer {
660 for hunk in hunks_to_reexpand {
661 editor.expand_diff_hunk(Some(diff_base_buffer.clone()), &hunk, cx);
662 }
663 }
664 })
665 .ok();
666 });
667
668 self.expanded_hunks.hunk_update_tasks.insert(
669 Some(buffer_id),
670 cx.background_executor().spawn(new_sync_task),
671 );
672 }
673
674 fn current_diff_base_buffer(
675 &mut self,
676 buffer: &Model<Buffer>,
677 cx: &mut AppContext,
678 ) -> Option<Model<Buffer>> {
679 buffer.update(cx, |buffer, _| {
680 match self.expanded_hunks.diff_base.entry(buffer.remote_id()) {
681 hash_map::Entry::Occupied(o) => {
682 if o.get().diff_base_version != buffer.diff_base_version() {
683 o.remove();
684 None
685 } else {
686 Some(o.get().buffer.clone())
687 }
688 }
689 hash_map::Entry::Vacant(_) => None,
690 }
691 })
692 }
693}
694
695fn to_diff_hunk(
696 hovered_hunk: &HoveredHunk,
697 multi_buffer_snapshot: &MultiBufferSnapshot,
698) -> Option<MultiBufferDiffHunk> {
699 let buffer_id = hovered_hunk
700 .multi_buffer_range
701 .start
702 .buffer_id
703 .or(hovered_hunk.multi_buffer_range.end.buffer_id)?;
704 let buffer_range = hovered_hunk.multi_buffer_range.start.text_anchor
705 ..hovered_hunk.multi_buffer_range.end.text_anchor;
706 let point_range = hovered_hunk
707 .multi_buffer_range
708 .to_point(multi_buffer_snapshot);
709 Some(MultiBufferDiffHunk {
710 row_range: MultiBufferRow(point_range.start.row)..MultiBufferRow(point_range.end.row),
711 buffer_id,
712 buffer_range,
713 diff_base_byte_range: hovered_hunk.diff_base_byte_range.clone(),
714 })
715}
716
717fn create_diff_base_buffer(buffer: &Model<Buffer>, cx: &mut AppContext) -> Option<Model<Buffer>> {
718 buffer
719 .update(cx, |buffer, _| {
720 let language = buffer.language().cloned();
721 let diff_base = buffer.diff_base()?.clone();
722 Some((buffer.line_ending(), diff_base, language))
723 })
724 .map(|(line_ending, diff_base, language)| {
725 cx.new_model(|cx| {
726 let buffer = Buffer::local_normalized(diff_base, line_ending, cx);
727 match language {
728 Some(language) => buffer.with_language(language, cx),
729 None => buffer,
730 }
731 })
732 })
733}
734
735fn added_hunk_color(cx: &AppContext) -> Hsla {
736 let mut created_color = cx.theme().status().git().created;
737 created_color.fade_out(0.7);
738 created_color
739}
740
741fn deleted_hunk_color(cx: &AppContext) -> Hsla {
742 let mut deleted_color = cx.theme().status().git().deleted;
743 deleted_color.fade_out(0.7);
744 deleted_color
745}
746
747fn editor_with_deleted_text(
748 diff_base_buffer: Model<Buffer>,
749 deleted_color: Hsla,
750 hunk: &HoveredHunk,
751 cx: &mut ViewContext<'_, Editor>,
752) -> (u32, View<Editor>) {
753 let parent_editor = cx.view().downgrade();
754 let editor = cx.new_view(|cx| {
755 let multi_buffer =
756 cx.new_model(|_| MultiBuffer::without_headers(language::Capability::ReadOnly));
757 multi_buffer.update(cx, |multi_buffer, cx| {
758 multi_buffer.push_excerpts(
759 diff_base_buffer,
760 Some(ExcerptRange {
761 context: hunk.diff_base_byte_range.clone(),
762 primary: None,
763 }),
764 cx,
765 );
766 });
767
768 let mut editor = Editor::for_multibuffer(multi_buffer, None, true, cx);
769 editor.set_soft_wrap_mode(language::language_settings::SoftWrap::None, cx);
770 editor.set_show_wrap_guides(false, cx);
771 editor.set_show_gutter(false, cx);
772 editor.scroll_manager.set_forbid_vertical_scroll(true);
773 editor.set_read_only(true);
774 editor.set_show_inline_completions(Some(false), cx);
775 editor.highlight_rows::<DiffRowHighlight>(
776 Anchor::min()..=Anchor::max(),
777 Some(deleted_color),
778 false,
779 cx,
780 );
781
782 let subscription_editor = parent_editor.clone();
783 editor._subscriptions.extend([
784 cx.on_blur(&editor.focus_handle, |editor, cx| {
785 editor.set_current_line_highlight(Some(CurrentLineHighlight::None));
786 editor.change_selections(None, cx, |s| {
787 s.try_cancel();
788 });
789 cx.notify();
790 }),
791 cx.on_focus(&editor.focus_handle, move |editor, cx| {
792 let restored_highlight = if let Some(parent_editor) = subscription_editor.upgrade()
793 {
794 parent_editor.read(cx).current_line_highlight
795 } else {
796 None
797 };
798 editor.set_current_line_highlight(restored_highlight);
799 cx.notify();
800 }),
801 cx.observe_global::<SettingsStore>(|editor, cx| {
802 if !editor.is_focused(cx) {
803 editor.set_current_line_highlight(Some(CurrentLineHighlight::None));
804 }
805 }),
806 ]);
807 let parent_editor_for_reverts = parent_editor.clone();
808 let original_multi_buffer_range = hunk.multi_buffer_range.clone();
809 let diff_base_range = hunk.diff_base_byte_range.clone();
810 editor
811 .register_action::<RevertSelectedHunks>(move |_, cx| {
812 parent_editor_for_reverts
813 .update(cx, |editor, cx| {
814 let Some((buffer, original_text)) =
815 editor.buffer().update(cx, |buffer, cx| {
816 let (_, buffer, _) = buffer
817 .excerpt_containing(original_multi_buffer_range.start, cx)?;
818 let original_text =
819 buffer.read(cx).diff_base()?.slice(diff_base_range.clone());
820 Some((buffer, Arc::from(original_text.to_string())))
821 })
822 else {
823 return;
824 };
825 buffer.update(cx, |buffer, cx| {
826 buffer.edit(
827 Some((
828 original_multi_buffer_range.start.text_anchor
829 ..original_multi_buffer_range.end.text_anchor,
830 original_text,
831 )),
832 None,
833 cx,
834 )
835 });
836 })
837 .ok();
838 })
839 .detach();
840 let hunk = hunk.clone();
841 editor
842 .register_action::<ToggleHunkDiff>(move |_, cx| {
843 parent_editor
844 .update(cx, |editor, cx| {
845 editor.toggle_hovered_hunk(&hunk, cx);
846 })
847 .ok();
848 })
849 .detach();
850 editor
851 });
852
853 let editor_height = editor.update(cx, |editor, cx| editor.max_point(cx).row().0);
854 (editor_height, editor)
855}
856
857fn buffer_diff_hunk(
858 buffer_snapshot: &MultiBufferSnapshot,
859 row_range: Range<Point>,
860) -> Option<MultiBufferDiffHunk> {
861 let mut hunks = buffer_snapshot.git_diff_hunks_in_range(
862 MultiBufferRow(row_range.start.row)..MultiBufferRow(row_range.end.row),
863 );
864 let hunk = hunks.next()?;
865 let second_hunk = hunks.next();
866 if second_hunk.is_none() {
867 return Some(hunk);
868 }
869 None
870}
871
872fn to_inclusive_row_range(
873 row_range: Range<Anchor>,
874 snapshot: &EditorSnapshot,
875) -> RangeInclusive<Anchor> {
876 let mut display_row_range =
877 row_range.start.to_display_point(snapshot)..row_range.end.to_display_point(snapshot);
878 if display_row_range.end.row() > display_row_range.start.row() {
879 *display_row_range.end.row_mut() -= 1;
880 }
881 let point_range = display_row_range.start.to_point(&snapshot.display_snapshot)
882 ..display_row_range.end.to_point(&snapshot.display_snapshot);
883 let new_range = point_range.to_anchors(&snapshot.buffer_snapshot);
884 new_range.start..=new_range.end
885}