90 lines
3.1 KiB
Java
90 lines
3.1 KiB
Java
package androidx.recyclerview.widget;
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import androidx.annotation.NonNull;
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public class BatchingListUpdateCallback implements ListUpdateCallback {
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private static final int TYPE_ADD = 1;
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private static final int TYPE_CHANGE = 3;
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private static final int TYPE_NONE = 0;
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private static final int TYPE_REMOVE = 2;
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public int mLastEventCount = -1;
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public Object mLastEventPayload = null;
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public int mLastEventPosition = -1;
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public int mLastEventType = 0;
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public final ListUpdateCallback mWrapped;
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public BatchingListUpdateCallback(@NonNull ListUpdateCallback listUpdateCallback) {
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this.mWrapped = listUpdateCallback;
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}
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public void dispatchLastEvent() {
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int i = this.mLastEventType;
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if (i != 0) {
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if (i == 1) {
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this.mWrapped.onInserted(this.mLastEventPosition, this.mLastEventCount);
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} else if (i == 2) {
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this.mWrapped.onRemoved(this.mLastEventPosition, this.mLastEventCount);
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} else if (i == 3) {
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this.mWrapped.onChanged(this.mLastEventPosition, this.mLastEventCount, this.mLastEventPayload);
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}
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this.mLastEventPayload = null;
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this.mLastEventType = 0;
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}
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}
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@Override // androidx.recyclerview.widget.ListUpdateCallback
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public void onChanged(int i, int i2, Object obj) {
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int i3;
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if (this.mLastEventType == 3) {
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int i4 = this.mLastEventPosition;
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int i5 = this.mLastEventCount;
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if (i <= i4 + i5 && (i3 = i + i2) >= i4 && this.mLastEventPayload == obj) {
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this.mLastEventPosition = Math.min(i, i4);
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this.mLastEventCount = Math.max(i5 + i4, i3) - this.mLastEventPosition;
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return;
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}
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}
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dispatchLastEvent();
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this.mLastEventPosition = i;
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this.mLastEventCount = i2;
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this.mLastEventPayload = obj;
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this.mLastEventType = 3;
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}
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@Override // androidx.recyclerview.widget.ListUpdateCallback
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public void onInserted(int i, int i2) {
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int i3;
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if (this.mLastEventType == 1 && i >= (i3 = this.mLastEventPosition)) {
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int i4 = this.mLastEventCount;
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if (i <= i3 + i4) {
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this.mLastEventCount = i4 + i2;
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this.mLastEventPosition = Math.min(i, i3);
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return;
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}
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}
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dispatchLastEvent();
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this.mLastEventPosition = i;
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this.mLastEventCount = i2;
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this.mLastEventType = 1;
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}
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@Override // androidx.recyclerview.widget.ListUpdateCallback
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public void onMoved(int i, int i2) {
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dispatchLastEvent();
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this.mWrapped.onMoved(i, i2);
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}
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@Override // androidx.recyclerview.widget.ListUpdateCallback
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public void onRemoved(int i, int i2) {
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int i3;
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if (this.mLastEventType != 2 || (i3 = this.mLastEventPosition) < i || i3 > i + i2) {
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dispatchLastEvent();
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this.mLastEventPosition = i;
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this.mLastEventCount = i2;
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this.mLastEventType = 2;
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return;
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}
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this.mLastEventCount += i2;
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this.mLastEventPosition = i;
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}
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}
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