ADD week 5
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package androidx.recyclerview.widget;
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import android.util.Log;
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import android.util.SparseBooleanArray;
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import android.util.SparseIntArray;
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import androidx.recyclerview.widget.ThreadUtil;
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import androidx.recyclerview.widget.TileList;
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/* loaded from: classes.dex */
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public class AsyncListUtil<T> {
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static final boolean DEBUG = false;
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static final String TAG = "AsyncListUtil";
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boolean mAllowScrollHints;
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private final ThreadUtil.BackgroundCallback<T> mBackgroundCallback;
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final ThreadUtil.BackgroundCallback<T> mBackgroundProxy;
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final DataCallback<T> mDataCallback;
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private final ThreadUtil.MainThreadCallback<T> mMainThreadCallback;
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final ThreadUtil.MainThreadCallback<T> mMainThreadProxy;
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final Class<T> mTClass;
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final TileList<T> mTileList;
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final int mTileSize;
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final ViewCallback mViewCallback;
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final int[] mTmpRange = new int[2];
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final int[] mPrevRange = new int[2];
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final int[] mTmpRangeExtended = new int[2];
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private int mScrollHint = 0;
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int mItemCount = 0;
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int mDisplayedGeneration = 0;
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int mRequestedGeneration = 0;
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final SparseIntArray mMissingPositions = new SparseIntArray();
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public static abstract class DataCallback<T> {
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public abstract void fillData(T[] tArr, int i, int i2);
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public int getMaxCachedTiles() {
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return 10;
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}
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public void recycleData(T[] tArr, int i) {
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}
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public abstract int refreshData();
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}
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private boolean isRefreshPending() {
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return this.mRequestedGeneration != this.mDisplayedGeneration;
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}
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public int getItemCount() {
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return this.mItemCount;
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}
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void log(String str, Object... objArr) {
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Log.d(TAG, "[MAIN] " + String.format(str, objArr));
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}
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public AsyncListUtil(Class<T> cls, int i, DataCallback<T> dataCallback, ViewCallback viewCallback) {
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ThreadUtil.MainThreadCallback<T> mainThreadCallback = new ThreadUtil.MainThreadCallback<T>() { // from class: androidx.recyclerview.widget.AsyncListUtil.1
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@Override // androidx.recyclerview.widget.ThreadUtil.MainThreadCallback
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public void updateItemCount(int i2, int i3) {
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if (isRequestedGeneration(i2)) {
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AsyncListUtil.this.mItemCount = i3;
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AsyncListUtil.this.mViewCallback.onDataRefresh();
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AsyncListUtil asyncListUtil = AsyncListUtil.this;
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asyncListUtil.mDisplayedGeneration = asyncListUtil.mRequestedGeneration;
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recycleAllTiles();
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AsyncListUtil.this.mAllowScrollHints = false;
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AsyncListUtil.this.updateRange();
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}
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}
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@Override // androidx.recyclerview.widget.ThreadUtil.MainThreadCallback
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public void addTile(int i2, TileList.Tile<T> tile) {
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if (!isRequestedGeneration(i2)) {
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AsyncListUtil.this.mBackgroundProxy.recycleTile(tile);
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return;
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}
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TileList.Tile<T> addOrReplace = AsyncListUtil.this.mTileList.addOrReplace(tile);
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if (addOrReplace != null) {
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Log.e(AsyncListUtil.TAG, "duplicate tile @" + addOrReplace.mStartPosition);
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AsyncListUtil.this.mBackgroundProxy.recycleTile(addOrReplace);
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}
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int i3 = tile.mStartPosition + tile.mItemCount;
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int i4 = 0;
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while (i4 < AsyncListUtil.this.mMissingPositions.size()) {
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int keyAt = AsyncListUtil.this.mMissingPositions.keyAt(i4);
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if (tile.mStartPosition > keyAt || keyAt >= i3) {
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i4++;
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} else {
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AsyncListUtil.this.mMissingPositions.removeAt(i4);
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AsyncListUtil.this.mViewCallback.onItemLoaded(keyAt);
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}
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}
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}
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@Override // androidx.recyclerview.widget.ThreadUtil.MainThreadCallback
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public void removeTile(int i2, int i3) {
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if (isRequestedGeneration(i2)) {
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TileList.Tile<T> removeAtPos = AsyncListUtil.this.mTileList.removeAtPos(i3);
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if (removeAtPos == null) {
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Log.e(AsyncListUtil.TAG, "tile not found @" + i3);
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return;
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}
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AsyncListUtil.this.mBackgroundProxy.recycleTile(removeAtPos);
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}
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}
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private void recycleAllTiles() {
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for (int i2 = 0; i2 < AsyncListUtil.this.mTileList.size(); i2++) {
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AsyncListUtil.this.mBackgroundProxy.recycleTile(AsyncListUtil.this.mTileList.getAtIndex(i2));
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}
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AsyncListUtil.this.mTileList.clear();
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}
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private boolean isRequestedGeneration(int i2) {
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return i2 == AsyncListUtil.this.mRequestedGeneration;
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}
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};
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this.mMainThreadCallback = mainThreadCallback;
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ThreadUtil.BackgroundCallback<T> backgroundCallback = new ThreadUtil.BackgroundCallback<T>() { // from class: androidx.recyclerview.widget.AsyncListUtil.2
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private int mFirstRequiredTileStart;
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private int mGeneration;
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private int mItemCount;
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private int mLastRequiredTileStart;
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final SparseBooleanArray mLoadedTiles = new SparseBooleanArray();
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private TileList.Tile<T> mRecycledRoot;
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@Override // androidx.recyclerview.widget.ThreadUtil.BackgroundCallback
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public void refresh(int i2) {
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this.mGeneration = i2;
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this.mLoadedTiles.clear();
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this.mItemCount = AsyncListUtil.this.mDataCallback.refreshData();
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AsyncListUtil.this.mMainThreadProxy.updateItemCount(this.mGeneration, this.mItemCount);
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}
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@Override // androidx.recyclerview.widget.ThreadUtil.BackgroundCallback
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public void updateRange(int i2, int i3, int i4, int i5, int i6) {
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if (i2 > i3) {
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return;
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}
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int tileStart = getTileStart(i2);
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int tileStart2 = getTileStart(i3);
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this.mFirstRequiredTileStart = getTileStart(i4);
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int tileStart3 = getTileStart(i5);
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this.mLastRequiredTileStart = tileStart3;
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if (i6 == 1) {
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requestTiles(this.mFirstRequiredTileStart, tileStart2, i6, true);
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requestTiles(tileStart2 + AsyncListUtil.this.mTileSize, this.mLastRequiredTileStart, i6, false);
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} else {
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requestTiles(tileStart, tileStart3, i6, false);
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requestTiles(this.mFirstRequiredTileStart, tileStart - AsyncListUtil.this.mTileSize, i6, true);
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}
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}
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private int getTileStart(int i2) {
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return i2 - (i2 % AsyncListUtil.this.mTileSize);
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}
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private void requestTiles(int i2, int i3, int i4, boolean z) {
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int i5 = i2;
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while (i5 <= i3) {
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AsyncListUtil.this.mBackgroundProxy.loadTile(z ? (i3 + i2) - i5 : i5, i4);
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i5 += AsyncListUtil.this.mTileSize;
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}
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}
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@Override // androidx.recyclerview.widget.ThreadUtil.BackgroundCallback
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public void loadTile(int i2, int i3) {
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if (isTileLoaded(i2)) {
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return;
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}
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TileList.Tile<T> acquireTile = acquireTile();
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acquireTile.mStartPosition = i2;
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acquireTile.mItemCount = Math.min(AsyncListUtil.this.mTileSize, this.mItemCount - acquireTile.mStartPosition);
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AsyncListUtil.this.mDataCallback.fillData(acquireTile.mItems, acquireTile.mStartPosition, acquireTile.mItemCount);
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flushTileCache(i3);
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addTile(acquireTile);
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}
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@Override // androidx.recyclerview.widget.ThreadUtil.BackgroundCallback
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public void recycleTile(TileList.Tile<T> tile) {
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AsyncListUtil.this.mDataCallback.recycleData(tile.mItems, tile.mItemCount);
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tile.mNext = this.mRecycledRoot;
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this.mRecycledRoot = tile;
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}
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private TileList.Tile<T> acquireTile() {
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TileList.Tile<T> tile = this.mRecycledRoot;
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if (tile != null) {
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this.mRecycledRoot = tile.mNext;
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return tile;
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}
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return new TileList.Tile<>(AsyncListUtil.this.mTClass, AsyncListUtil.this.mTileSize);
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}
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private boolean isTileLoaded(int i2) {
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return this.mLoadedTiles.get(i2);
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}
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private void addTile(TileList.Tile<T> tile) {
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this.mLoadedTiles.put(tile.mStartPosition, true);
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AsyncListUtil.this.mMainThreadProxy.addTile(this.mGeneration, tile);
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}
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private void removeTile(int i2) {
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this.mLoadedTiles.delete(i2);
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AsyncListUtil.this.mMainThreadProxy.removeTile(this.mGeneration, i2);
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}
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private void flushTileCache(int i2) {
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int maxCachedTiles = AsyncListUtil.this.mDataCallback.getMaxCachedTiles();
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while (this.mLoadedTiles.size() >= maxCachedTiles) {
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int keyAt = this.mLoadedTiles.keyAt(0);
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SparseBooleanArray sparseBooleanArray = this.mLoadedTiles;
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int keyAt2 = sparseBooleanArray.keyAt(sparseBooleanArray.size() - 1);
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int i3 = this.mFirstRequiredTileStart - keyAt;
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int i4 = keyAt2 - this.mLastRequiredTileStart;
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if (i3 > 0 && (i3 >= i4 || i2 == 2)) {
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removeTile(keyAt);
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} else {
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if (i4 <= 0) {
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return;
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}
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if (i3 >= i4 && i2 != 1) {
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return;
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} else {
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removeTile(keyAt2);
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}
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}
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}
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}
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private void log(String str, Object... objArr) {
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Log.d(AsyncListUtil.TAG, "[BKGR] " + String.format(str, objArr));
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}
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};
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this.mBackgroundCallback = backgroundCallback;
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this.mTClass = cls;
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this.mTileSize = i;
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this.mDataCallback = dataCallback;
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this.mViewCallback = viewCallback;
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this.mTileList = new TileList<>(i);
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MessageThreadUtil messageThreadUtil = new MessageThreadUtil();
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this.mMainThreadProxy = messageThreadUtil.getMainThreadProxy(mainThreadCallback);
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this.mBackgroundProxy = messageThreadUtil.getBackgroundProxy(backgroundCallback);
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refresh();
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}
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public void onRangeChanged() {
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if (isRefreshPending()) {
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return;
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}
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updateRange();
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this.mAllowScrollHints = true;
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}
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public void refresh() {
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this.mMissingPositions.clear();
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ThreadUtil.BackgroundCallback<T> backgroundCallback = this.mBackgroundProxy;
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int i = this.mRequestedGeneration + 1;
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this.mRequestedGeneration = i;
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backgroundCallback.refresh(i);
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}
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public T getItem(int i) {
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if (i < 0 || i >= this.mItemCount) {
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throw new IndexOutOfBoundsException(i + " is not within 0 and " + this.mItemCount);
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}
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T itemAt = this.mTileList.getItemAt(i);
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if (itemAt == null && !isRefreshPending()) {
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this.mMissingPositions.put(i, 0);
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}
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return itemAt;
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}
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void updateRange() {
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int i;
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this.mViewCallback.getItemRangeInto(this.mTmpRange);
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int[] iArr = this.mTmpRange;
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int i2 = iArr[0];
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int i3 = iArr[1];
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if (i2 > i3 || i2 < 0 || i3 >= this.mItemCount) {
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return;
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}
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if (this.mAllowScrollHints) {
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int[] iArr2 = this.mPrevRange;
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if (i2 > iArr2[1] || (i = iArr2[0]) > i3) {
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this.mScrollHint = 0;
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} else if (i2 < i) {
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this.mScrollHint = 1;
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} else if (i2 > i) {
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this.mScrollHint = 2;
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}
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} else {
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this.mScrollHint = 0;
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}
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int[] iArr3 = this.mPrevRange;
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iArr3[0] = i2;
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iArr3[1] = i3;
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this.mViewCallback.extendRangeInto(iArr, this.mTmpRangeExtended, this.mScrollHint);
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int[] iArr4 = this.mTmpRangeExtended;
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iArr4[0] = Math.min(this.mTmpRange[0], Math.max(iArr4[0], 0));
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int[] iArr5 = this.mTmpRangeExtended;
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iArr5[1] = Math.max(this.mTmpRange[1], Math.min(iArr5[1], this.mItemCount - 1));
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ThreadUtil.BackgroundCallback<T> backgroundCallback = this.mBackgroundProxy;
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int[] iArr6 = this.mTmpRange;
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int i4 = iArr6[0];
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int i5 = iArr6[1];
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int[] iArr7 = this.mTmpRangeExtended;
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backgroundCallback.updateRange(i4, i5, iArr7[0], iArr7[1], this.mScrollHint);
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}
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public static abstract class ViewCallback {
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public static final int HINT_SCROLL_ASC = 2;
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public static final int HINT_SCROLL_DESC = 1;
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public static final int HINT_SCROLL_NONE = 0;
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public abstract void getItemRangeInto(int[] iArr);
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public abstract void onDataRefresh();
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public abstract void onItemLoaded(int i);
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public void extendRangeInto(int[] iArr, int[] iArr2, int i) {
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int i2 = iArr[1];
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int i3 = iArr[0];
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int i4 = (i2 - i3) + 1;
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int i5 = i4 / 2;
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iArr2[0] = i3 - (i == 1 ? i4 : i5);
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if (i != 2) {
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i4 = i5;
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}
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iArr2[1] = i2 + i4;
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}
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}
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}
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