2025-03-31 16:33:42 +02:00

439 lines
17 KiB
Java

package androidx.recyclerview.widget;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
/* loaded from: classes.dex */
public class DiffUtil {
private static final Comparator<Snake> SNAKE_COMPARATOR = new Comparator<Snake>() { // from class: androidx.recyclerview.widget.DiffUtil.1
@Override // java.util.Comparator
public int compare(Snake snake, Snake snake2) {
int i = snake.x - snake2.x;
return i == 0 ? snake.y - snake2.y : i;
}
};
public static abstract class Callback {
public abstract boolean areContentsTheSame(int i, int i2);
public abstract boolean areItemsTheSame(int i, int i2);
public Object getChangePayload(int i, int i2) {
return null;
}
public abstract int getNewListSize();
public abstract int getOldListSize();
}
public static abstract class ItemCallback<T> {
public abstract boolean areContentsTheSame(T t, T t2);
public abstract boolean areItemsTheSame(T t, T t2);
public Object getChangePayload(T t, T t2) {
return null;
}
}
private DiffUtil() {
}
public static DiffResult calculateDiff(Callback callback) {
return calculateDiff(callback, true);
}
public static DiffResult calculateDiff(Callback callback, boolean z) {
int oldListSize = callback.getOldListSize();
int newListSize = callback.getNewListSize();
ArrayList arrayList = new ArrayList();
ArrayList arrayList2 = new ArrayList();
arrayList2.add(new Range(0, oldListSize, 0, newListSize));
int abs = oldListSize + newListSize + Math.abs(oldListSize - newListSize);
int i = abs * 2;
int[] iArr = new int[i];
int[] iArr2 = new int[i];
ArrayList arrayList3 = new ArrayList();
while (!arrayList2.isEmpty()) {
Range range = (Range) arrayList2.remove(arrayList2.size() - 1);
Snake diffPartial = diffPartial(callback, range.oldListStart, range.oldListEnd, range.newListStart, range.newListEnd, iArr, iArr2, abs);
if (diffPartial != null) {
if (diffPartial.size > 0) {
arrayList.add(diffPartial);
}
diffPartial.x += range.oldListStart;
diffPartial.y += range.newListStart;
Range range2 = arrayList3.isEmpty() ? new Range() : (Range) arrayList3.remove(arrayList3.size() - 1);
range2.oldListStart = range.oldListStart;
range2.newListStart = range.newListStart;
if (diffPartial.reverse) {
range2.oldListEnd = diffPartial.x;
range2.newListEnd = diffPartial.y;
} else if (diffPartial.removal) {
range2.oldListEnd = diffPartial.x - 1;
range2.newListEnd = diffPartial.y;
} else {
range2.oldListEnd = diffPartial.x;
range2.newListEnd = diffPartial.y - 1;
}
arrayList2.add(range2);
if (diffPartial.reverse) {
if (diffPartial.removal) {
range.oldListStart = diffPartial.x + diffPartial.size + 1;
range.newListStart = diffPartial.y + diffPartial.size;
} else {
range.oldListStart = diffPartial.x + diffPartial.size;
range.newListStart = diffPartial.y + diffPartial.size + 1;
}
} else {
range.oldListStart = diffPartial.x + diffPartial.size;
range.newListStart = diffPartial.y + diffPartial.size;
}
arrayList2.add(range);
} else {
arrayList3.add(range);
}
}
Collections.sort(arrayList, SNAKE_COMPARATOR);
return new DiffResult(callback, arrayList, iArr, iArr2, z);
}
/* JADX WARN: Code restructure failed: missing block: B:14:0x0042, code lost:
if (r24[r13 - 1] < r24[r13 + r5]) goto L20;
*/
/* JADX WARN: Code restructure failed: missing block: B:51:0x00b8, code lost:
if (r25[r12 - 1] < r25[r12 + 1]) goto L50;
*/
/* JADX WARN: Removed duplicated region for block: B:58:0x00e1 A[LOOP:4: B:54:0x00cd->B:58:0x00e1, LOOP_END] */
/* JADX WARN: Removed duplicated region for block: B:59:0x00ec A[EDGE_INSN: B:59:0x00ec->B:60:0x00ec BREAK A[LOOP:4: B:54:0x00cd->B:58:0x00e1], SYNTHETIC] */
/*
Code decompiled incorrectly, please refer to instructions dump.
To view partially-correct add '--show-bad-code' argument
*/
private static androidx.recyclerview.widget.DiffUtil.Snake diffPartial(androidx.recyclerview.widget.DiffUtil.Callback r19, int r20, int r21, int r22, int r23, int[] r24, int[] r25, int r26) {
/*
Method dump skipped, instructions count: 305
To view this dump add '--comments-level debug' option
*/
throw new UnsupportedOperationException("Method not decompiled: androidx.recyclerview.widget.DiffUtil.diffPartial(androidx.recyclerview.widget.DiffUtil$Callback, int, int, int, int, int[], int[], int):androidx.recyclerview.widget.DiffUtil$Snake");
}
static class Snake {
boolean removal;
boolean reverse;
int size;
int x;
int y;
Snake() {
}
}
static class Range {
int newListEnd;
int newListStart;
int oldListEnd;
int oldListStart;
public Range() {
}
public Range(int i, int i2, int i3, int i4) {
this.oldListStart = i;
this.oldListEnd = i2;
this.newListStart = i3;
this.newListEnd = i4;
}
}
public static class DiffResult {
private static final int FLAG_CHANGED = 2;
private static final int FLAG_IGNORE = 16;
private static final int FLAG_MASK = 31;
private static final int FLAG_MOVED_CHANGED = 4;
private static final int FLAG_MOVED_NOT_CHANGED = 8;
private static final int FLAG_NOT_CHANGED = 1;
private static final int FLAG_OFFSET = 5;
public static final int NO_POSITION = -1;
private final Callback mCallback;
private final boolean mDetectMoves;
private final int[] mNewItemStatuses;
private final int mNewListSize;
private final int[] mOldItemStatuses;
private final int mOldListSize;
private final List<Snake> mSnakes;
List<Snake> getSnakes() {
return this.mSnakes;
}
DiffResult(Callback callback, List<Snake> list, int[] iArr, int[] iArr2, boolean z) {
this.mSnakes = list;
this.mOldItemStatuses = iArr;
this.mNewItemStatuses = iArr2;
Arrays.fill(iArr, 0);
Arrays.fill(iArr2, 0);
this.mCallback = callback;
this.mOldListSize = callback.getOldListSize();
this.mNewListSize = callback.getNewListSize();
this.mDetectMoves = z;
addRootSnake();
findMatchingItems();
}
private void addRootSnake() {
Snake snake = this.mSnakes.isEmpty() ? null : this.mSnakes.get(0);
if (snake != null && snake.x == 0 && snake.y == 0) {
return;
}
Snake snake2 = new Snake();
snake2.x = 0;
snake2.y = 0;
snake2.removal = false;
snake2.size = 0;
snake2.reverse = false;
this.mSnakes.add(0, snake2);
}
private void findMatchingItems() {
int i = this.mOldListSize;
int i2 = this.mNewListSize;
for (int size = this.mSnakes.size() - 1; size >= 0; size--) {
Snake snake = this.mSnakes.get(size);
int i3 = snake.x + snake.size;
int i4 = snake.y + snake.size;
if (this.mDetectMoves) {
while (i > i3) {
findAddition(i, i2, size);
i--;
}
while (i2 > i4) {
findRemoval(i, i2, size);
i2--;
}
}
for (int i5 = 0; i5 < snake.size; i5++) {
int i6 = snake.x + i5;
int i7 = snake.y + i5;
int i8 = this.mCallback.areContentsTheSame(i6, i7) ? 1 : 2;
this.mOldItemStatuses[i6] = (i7 << 5) | i8;
this.mNewItemStatuses[i7] = (i6 << 5) | i8;
}
i = snake.x;
i2 = snake.y;
}
}
private void findAddition(int i, int i2, int i3) {
if (this.mOldItemStatuses[i - 1] != 0) {
return;
}
findMatchingItem(i, i2, i3, false);
}
private void findRemoval(int i, int i2, int i3) {
if (this.mNewItemStatuses[i2 - 1] != 0) {
return;
}
findMatchingItem(i, i2, i3, true);
}
public int convertOldPositionToNew(int i) {
if (i < 0 || i >= this.mOldListSize) {
throw new IndexOutOfBoundsException("Index out of bounds - passed position = " + i + ", old list size = " + this.mOldListSize);
}
int i2 = this.mOldItemStatuses[i];
if ((i2 & 31) == 0) {
return -1;
}
return i2 >> 5;
}
public int convertNewPositionToOld(int i) {
if (i < 0 || i >= this.mNewListSize) {
throw new IndexOutOfBoundsException("Index out of bounds - passed position = " + i + ", new list size = " + this.mNewListSize);
}
int i2 = this.mNewItemStatuses[i];
if ((i2 & 31) == 0) {
return -1;
}
return i2 >> 5;
}
private boolean findMatchingItem(int i, int i2, int i3, boolean z) {
int i4;
int i5;
int i6;
if (z) {
i2--;
i5 = i;
i4 = i2;
} else {
i4 = i - 1;
i5 = i4;
}
while (i3 >= 0) {
Snake snake = this.mSnakes.get(i3);
int i7 = snake.x + snake.size;
int i8 = snake.y + snake.size;
if (z) {
for (int i9 = i5 - 1; i9 >= i7; i9--) {
if (this.mCallback.areItemsTheSame(i9, i4)) {
i6 = this.mCallback.areContentsTheSame(i9, i4) ? 8 : 4;
this.mNewItemStatuses[i4] = (i9 << 5) | 16;
this.mOldItemStatuses[i9] = (i4 << 5) | i6;
return true;
}
}
} else {
for (int i10 = i2 - 1; i10 >= i8; i10--) {
if (this.mCallback.areItemsTheSame(i4, i10)) {
i6 = this.mCallback.areContentsTheSame(i4, i10) ? 8 : 4;
int i11 = i - 1;
this.mOldItemStatuses[i11] = (i10 << 5) | 16;
this.mNewItemStatuses[i10] = (i11 << 5) | i6;
return true;
}
}
}
i5 = snake.x;
i2 = snake.y;
i3--;
}
return false;
}
public void dispatchUpdatesTo(RecyclerView.Adapter adapter) {
dispatchUpdatesTo(new AdapterListUpdateCallback(adapter));
}
public void dispatchUpdatesTo(ListUpdateCallback listUpdateCallback) {
BatchingListUpdateCallback batchingListUpdateCallback;
if (listUpdateCallback instanceof BatchingListUpdateCallback) {
batchingListUpdateCallback = (BatchingListUpdateCallback) listUpdateCallback;
} else {
batchingListUpdateCallback = new BatchingListUpdateCallback(listUpdateCallback);
}
ArrayList arrayList = new ArrayList();
int i = this.mOldListSize;
int i2 = this.mNewListSize;
for (int size = this.mSnakes.size() - 1; size >= 0; size--) {
Snake snake = this.mSnakes.get(size);
int i3 = snake.size;
int i4 = snake.x + i3;
int i5 = snake.y + i3;
if (i4 < i) {
dispatchRemovals(arrayList, batchingListUpdateCallback, i4, i - i4, i4);
}
if (i5 < i2) {
dispatchAdditions(arrayList, batchingListUpdateCallback, i4, i2 - i5, i5);
}
for (int i6 = i3 - 1; i6 >= 0; i6--) {
if ((this.mOldItemStatuses[snake.x + i6] & 31) == 2) {
batchingListUpdateCallback.onChanged(snake.x + i6, 1, this.mCallback.getChangePayload(snake.x + i6, snake.y + i6));
}
}
i = snake.x;
i2 = snake.y;
}
batchingListUpdateCallback.dispatchLastEvent();
}
private static PostponedUpdate removePostponedUpdate(List<PostponedUpdate> list, int i, boolean z) {
int size = list.size() - 1;
while (size >= 0) {
PostponedUpdate postponedUpdate = list.get(size);
if (postponedUpdate.posInOwnerList == i && postponedUpdate.removal == z) {
list.remove(size);
while (size < list.size()) {
list.get(size).currentPos += z ? 1 : -1;
size++;
}
return postponedUpdate;
}
size--;
}
return null;
}
private void dispatchAdditions(List<PostponedUpdate> list, ListUpdateCallback listUpdateCallback, int i, int i2, int i3) {
if (!this.mDetectMoves) {
listUpdateCallback.onInserted(i, i2);
return;
}
for (int i4 = i2 - 1; i4 >= 0; i4--) {
int i5 = i3 + i4;
int i6 = this.mNewItemStatuses[i5];
int i7 = i6 & 31;
if (i7 == 0) {
listUpdateCallback.onInserted(i, 1);
Iterator<PostponedUpdate> it = list.iterator();
while (it.hasNext()) {
it.next().currentPos++;
}
} else if (i7 == 4 || i7 == 8) {
int i8 = i6 >> 5;
listUpdateCallback.onMoved(removePostponedUpdate(list, i8, true).currentPos, i);
if (i7 == 4) {
listUpdateCallback.onChanged(i, 1, this.mCallback.getChangePayload(i8, i5));
}
} else if (i7 == 16) {
list.add(new PostponedUpdate(i5, i, false));
} else {
throw new IllegalStateException("unknown flag for pos " + i5 + " " + Long.toBinaryString(i7));
}
}
}
private void dispatchRemovals(List<PostponedUpdate> list, ListUpdateCallback listUpdateCallback, int i, int i2, int i3) {
if (!this.mDetectMoves) {
listUpdateCallback.onRemoved(i, i2);
return;
}
for (int i4 = i2 - 1; i4 >= 0; i4--) {
int i5 = i3 + i4;
int i6 = this.mOldItemStatuses[i5];
int i7 = i6 & 31;
if (i7 == 0) {
listUpdateCallback.onRemoved(i + i4, 1);
Iterator<PostponedUpdate> it = list.iterator();
while (it.hasNext()) {
it.next().currentPos--;
}
} else if (i7 == 4 || i7 == 8) {
int i8 = i6 >> 5;
PostponedUpdate removePostponedUpdate = removePostponedUpdate(list, i8, false);
listUpdateCallback.onMoved(i + i4, removePostponedUpdate.currentPos - 1);
if (i7 == 4) {
listUpdateCallback.onChanged(removePostponedUpdate.currentPos - 1, 1, this.mCallback.getChangePayload(i5, i8));
}
} else if (i7 == 16) {
list.add(new PostponedUpdate(i5, i + i4, true));
} else {
throw new IllegalStateException("unknown flag for pos " + i5 + " " + Long.toBinaryString(i7));
}
}
}
}
private static class PostponedUpdate {
int currentPos;
int posInOwnerList;
boolean removal;
public PostponedUpdate(int i, int i2, boolean z) {
this.posInOwnerList = i;
this.currentPos = i2;
this.removal = z;
}
}
}