1550 lines
65 KiB
Java
1550 lines
65 KiB
Java
package androidx.recyclerview.widget;
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import android.content.Context;
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import android.graphics.PointF;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.View;
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import android.view.accessibility.AccessibilityEvent;
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import androidx.fragment.app.FragmentTransaction;
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import androidx.recyclerview.widget.ItemTouchHelper;
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import androidx.recyclerview.widget.RecyclerView;
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import java.util.List;
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/* loaded from: classes.dex */
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public class LinearLayoutManager extends RecyclerView.LayoutManager implements ItemTouchHelper.ViewDropHandler, RecyclerView.SmoothScroller.ScrollVectorProvider {
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static final boolean DEBUG = false;
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public static final int HORIZONTAL = 0;
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public static final int INVALID_OFFSET = Integer.MIN_VALUE;
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private static final float MAX_SCROLL_FACTOR = 0.33333334f;
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private static final String TAG = "LinearLayoutManager";
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public static final int VERTICAL = 1;
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final AnchorInfo mAnchorInfo;
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private int mInitialPrefetchItemCount;
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private boolean mLastStackFromEnd;
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private final LayoutChunkResult mLayoutChunkResult;
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private LayoutState mLayoutState;
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int mOrientation;
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OrientationHelper mOrientationHelper;
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SavedState mPendingSavedState;
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int mPendingScrollPosition;
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int mPendingScrollPositionOffset;
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private boolean mRecycleChildrenOnDetach;
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private int[] mReusableIntPair;
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private boolean mReverseLayout;
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boolean mShouldReverseLayout;
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private boolean mSmoothScrollbarEnabled;
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private boolean mStackFromEnd;
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public boolean canScrollHorizontally() {
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return this.mOrientation == 0;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public boolean canScrollVertically() {
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return this.mOrientation == 1;
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}
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public int getInitialPrefetchItemCount() {
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return this.mInitialPrefetchItemCount;
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}
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public int getOrientation() {
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return this.mOrientation;
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}
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public boolean getRecycleChildrenOnDetach() {
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return this.mRecycleChildrenOnDetach;
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}
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public boolean getReverseLayout() {
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return this.mReverseLayout;
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}
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public boolean getStackFromEnd() {
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return this.mStackFromEnd;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public boolean isAutoMeasureEnabled() {
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return true;
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}
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public boolean isSmoothScrollbarEnabled() {
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return this.mSmoothScrollbarEnabled;
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}
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void onAnchorReady(RecyclerView.Recycler recycler, RecyclerView.State state, AnchorInfo anchorInfo, int i) {
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}
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public void setInitialPrefetchItemCount(int i) {
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this.mInitialPrefetchItemCount = i;
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}
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public void setRecycleChildrenOnDetach(boolean z) {
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this.mRecycleChildrenOnDetach = z;
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}
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public void setSmoothScrollbarEnabled(boolean z) {
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this.mSmoothScrollbarEnabled = z;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public boolean supportsPredictiveItemAnimations() {
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return this.mPendingSavedState == null && this.mLastStackFromEnd == this.mStackFromEnd;
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}
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public LinearLayoutManager(Context context) {
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this(context, 1, false);
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}
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public LinearLayoutManager(Context context, int i, boolean z) {
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this.mOrientation = 1;
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this.mReverseLayout = false;
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this.mShouldReverseLayout = false;
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this.mStackFromEnd = false;
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this.mSmoothScrollbarEnabled = true;
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this.mPendingScrollPosition = -1;
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this.mPendingScrollPositionOffset = Integer.MIN_VALUE;
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this.mPendingSavedState = null;
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this.mAnchorInfo = new AnchorInfo();
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this.mLayoutChunkResult = new LayoutChunkResult();
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this.mInitialPrefetchItemCount = 2;
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this.mReusableIntPair = new int[2];
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setOrientation(i);
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setReverseLayout(z);
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}
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public LinearLayoutManager(Context context, AttributeSet attributeSet, int i, int i2) {
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this.mOrientation = 1;
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this.mReverseLayout = false;
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this.mShouldReverseLayout = false;
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this.mStackFromEnd = false;
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this.mSmoothScrollbarEnabled = true;
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this.mPendingScrollPosition = -1;
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this.mPendingScrollPositionOffset = Integer.MIN_VALUE;
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this.mPendingSavedState = null;
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this.mAnchorInfo = new AnchorInfo();
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this.mLayoutChunkResult = new LayoutChunkResult();
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this.mInitialPrefetchItemCount = 2;
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this.mReusableIntPair = new int[2];
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RecyclerView.LayoutManager.Properties properties = getProperties(context, attributeSet, i, i2);
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setOrientation(properties.orientation);
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setReverseLayout(properties.reverseLayout);
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setStackFromEnd(properties.stackFromEnd);
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public RecyclerView.LayoutParams generateDefaultLayoutParams() {
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return new RecyclerView.LayoutParams(-2, -2);
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void onDetachedFromWindow(RecyclerView recyclerView, RecyclerView.Recycler recycler) {
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super.onDetachedFromWindow(recyclerView, recycler);
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if (this.mRecycleChildrenOnDetach) {
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removeAndRecycleAllViews(recycler);
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recycler.clear();
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}
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void onInitializeAccessibilityEvent(AccessibilityEvent accessibilityEvent) {
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super.onInitializeAccessibilityEvent(accessibilityEvent);
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if (getChildCount() > 0) {
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accessibilityEvent.setFromIndex(findFirstVisibleItemPosition());
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accessibilityEvent.setToIndex(findLastVisibleItemPosition());
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}
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public Parcelable onSaveInstanceState() {
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if (this.mPendingSavedState != null) {
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return new SavedState(this.mPendingSavedState);
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}
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SavedState savedState = new SavedState();
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if (getChildCount() > 0) {
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ensureLayoutState();
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boolean z = this.mLastStackFromEnd ^ this.mShouldReverseLayout;
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savedState.mAnchorLayoutFromEnd = z;
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if (z) {
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View childClosestToEnd = getChildClosestToEnd();
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savedState.mAnchorOffset = this.mOrientationHelper.getEndAfterPadding() - this.mOrientationHelper.getDecoratedEnd(childClosestToEnd);
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savedState.mAnchorPosition = getPosition(childClosestToEnd);
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} else {
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View childClosestToStart = getChildClosestToStart();
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savedState.mAnchorPosition = getPosition(childClosestToStart);
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savedState.mAnchorOffset = this.mOrientationHelper.getDecoratedStart(childClosestToStart) - this.mOrientationHelper.getStartAfterPadding();
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}
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} else {
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savedState.invalidateAnchor();
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}
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return savedState;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void onRestoreInstanceState(Parcelable parcelable) {
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if (parcelable instanceof SavedState) {
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this.mPendingSavedState = (SavedState) parcelable;
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requestLayout();
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}
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}
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public void setStackFromEnd(boolean z) {
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assertNotInLayoutOrScroll(null);
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if (this.mStackFromEnd == z) {
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return;
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}
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this.mStackFromEnd = z;
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requestLayout();
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}
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public void setOrientation(int i) {
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if (i != 0 && i != 1) {
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throw new IllegalArgumentException("invalid orientation:" + i);
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}
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assertNotInLayoutOrScroll(null);
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if (i != this.mOrientation || this.mOrientationHelper == null) {
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OrientationHelper createOrientationHelper = OrientationHelper.createOrientationHelper(this, i);
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this.mOrientationHelper = createOrientationHelper;
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this.mAnchorInfo.mOrientationHelper = createOrientationHelper;
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this.mOrientation = i;
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requestLayout();
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}
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}
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private void resolveShouldLayoutReverse() {
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if (this.mOrientation == 1 || !isLayoutRTL()) {
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this.mShouldReverseLayout = this.mReverseLayout;
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} else {
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this.mShouldReverseLayout = !this.mReverseLayout;
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}
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}
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public void setReverseLayout(boolean z) {
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assertNotInLayoutOrScroll(null);
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if (z == this.mReverseLayout) {
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return;
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}
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this.mReverseLayout = z;
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requestLayout();
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public View findViewByPosition(int i) {
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int childCount = getChildCount();
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if (childCount == 0) {
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return null;
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}
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int position = i - getPosition(getChildAt(0));
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if (position >= 0 && position < childCount) {
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View childAt = getChildAt(position);
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if (getPosition(childAt) == i) {
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return childAt;
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}
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}
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return super.findViewByPosition(i);
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}
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@Deprecated
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protected int getExtraLayoutSpace(RecyclerView.State state) {
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if (state.hasTargetScrollPosition()) {
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return this.mOrientationHelper.getTotalSpace();
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}
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return 0;
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}
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protected void calculateExtraLayoutSpace(RecyclerView.State state, int[] iArr) {
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int i;
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int extraLayoutSpace = getExtraLayoutSpace(state);
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if (this.mLayoutState.mLayoutDirection == -1) {
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i = 0;
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} else {
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i = extraLayoutSpace;
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extraLayoutSpace = 0;
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}
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iArr[0] = extraLayoutSpace;
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iArr[1] = i;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int i) {
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LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext());
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linearSmoothScroller.setTargetPosition(i);
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startSmoothScroll(linearSmoothScroller);
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}
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@Override // androidx.recyclerview.widget.RecyclerView.SmoothScroller.ScrollVectorProvider
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public PointF computeScrollVectorForPosition(int i) {
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if (getChildCount() == 0) {
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return null;
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}
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int i2 = (i < getPosition(getChildAt(0))) != this.mShouldReverseLayout ? -1 : 1;
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if (this.mOrientation == 0) {
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return new PointF(i2, 0.0f);
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}
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return new PointF(0.0f, i2);
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
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int i;
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int i2;
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int i3;
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int i4;
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int fixLayoutEndGap;
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int i5;
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View findViewByPosition;
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int decoratedStart;
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int i6;
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int i7 = -1;
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if ((this.mPendingSavedState != null || this.mPendingScrollPosition != -1) && state.getItemCount() == 0) {
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removeAndRecycleAllViews(recycler);
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return;
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}
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SavedState savedState = this.mPendingSavedState;
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if (savedState != null && savedState.hasValidAnchor()) {
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this.mPendingScrollPosition = this.mPendingSavedState.mAnchorPosition;
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}
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ensureLayoutState();
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this.mLayoutState.mRecycle = false;
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resolveShouldLayoutReverse();
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View focusedChild = getFocusedChild();
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if (!this.mAnchorInfo.mValid || this.mPendingScrollPosition != -1 || this.mPendingSavedState != null) {
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this.mAnchorInfo.reset();
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this.mAnchorInfo.mLayoutFromEnd = this.mShouldReverseLayout ^ this.mStackFromEnd;
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updateAnchorInfoForLayout(recycler, state, this.mAnchorInfo);
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this.mAnchorInfo.mValid = true;
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} else if (focusedChild != null && (this.mOrientationHelper.getDecoratedStart(focusedChild) >= this.mOrientationHelper.getEndAfterPadding() || this.mOrientationHelper.getDecoratedEnd(focusedChild) <= this.mOrientationHelper.getStartAfterPadding())) {
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this.mAnchorInfo.assignFromViewAndKeepVisibleRect(focusedChild, getPosition(focusedChild));
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}
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LayoutState layoutState = this.mLayoutState;
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layoutState.mLayoutDirection = layoutState.mLastScrollDelta >= 0 ? 1 : -1;
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int[] iArr = this.mReusableIntPair;
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iArr[0] = 0;
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iArr[1] = 0;
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calculateExtraLayoutSpace(state, iArr);
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int max = Math.max(0, this.mReusableIntPair[0]) + this.mOrientationHelper.getStartAfterPadding();
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int max2 = Math.max(0, this.mReusableIntPair[1]) + this.mOrientationHelper.getEndPadding();
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if (state.isPreLayout() && (i5 = this.mPendingScrollPosition) != -1 && this.mPendingScrollPositionOffset != Integer.MIN_VALUE && (findViewByPosition = findViewByPosition(i5)) != null) {
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if (this.mShouldReverseLayout) {
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i6 = this.mOrientationHelper.getEndAfterPadding() - this.mOrientationHelper.getDecoratedEnd(findViewByPosition);
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decoratedStart = this.mPendingScrollPositionOffset;
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} else {
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decoratedStart = this.mOrientationHelper.getDecoratedStart(findViewByPosition) - this.mOrientationHelper.getStartAfterPadding();
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i6 = this.mPendingScrollPositionOffset;
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}
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int i8 = i6 - decoratedStart;
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if (i8 > 0) {
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max += i8;
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} else {
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max2 -= i8;
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}
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}
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if (!this.mAnchorInfo.mLayoutFromEnd ? !this.mShouldReverseLayout : this.mShouldReverseLayout) {
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i7 = 1;
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}
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onAnchorReady(recycler, state, this.mAnchorInfo, i7);
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detachAndScrapAttachedViews(recycler);
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this.mLayoutState.mInfinite = resolveIsInfinite();
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this.mLayoutState.mIsPreLayout = state.isPreLayout();
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this.mLayoutState.mNoRecycleSpace = 0;
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if (this.mAnchorInfo.mLayoutFromEnd) {
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updateLayoutStateToFillStart(this.mAnchorInfo);
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this.mLayoutState.mExtraFillSpace = max;
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fill(recycler, this.mLayoutState, state, false);
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i2 = this.mLayoutState.mOffset;
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int i9 = this.mLayoutState.mCurrentPosition;
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if (this.mLayoutState.mAvailable > 0) {
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max2 += this.mLayoutState.mAvailable;
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}
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updateLayoutStateToFillEnd(this.mAnchorInfo);
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this.mLayoutState.mExtraFillSpace = max2;
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this.mLayoutState.mCurrentPosition += this.mLayoutState.mItemDirection;
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fill(recycler, this.mLayoutState, state, false);
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i = this.mLayoutState.mOffset;
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if (this.mLayoutState.mAvailable > 0) {
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int i10 = this.mLayoutState.mAvailable;
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updateLayoutStateToFillStart(i9, i2);
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this.mLayoutState.mExtraFillSpace = i10;
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fill(recycler, this.mLayoutState, state, false);
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i2 = this.mLayoutState.mOffset;
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}
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} else {
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updateLayoutStateToFillEnd(this.mAnchorInfo);
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this.mLayoutState.mExtraFillSpace = max2;
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fill(recycler, this.mLayoutState, state, false);
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i = this.mLayoutState.mOffset;
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int i11 = this.mLayoutState.mCurrentPosition;
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if (this.mLayoutState.mAvailable > 0) {
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max += this.mLayoutState.mAvailable;
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}
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updateLayoutStateToFillStart(this.mAnchorInfo);
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this.mLayoutState.mExtraFillSpace = max;
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this.mLayoutState.mCurrentPosition += this.mLayoutState.mItemDirection;
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fill(recycler, this.mLayoutState, state, false);
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i2 = this.mLayoutState.mOffset;
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if (this.mLayoutState.mAvailable > 0) {
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int i12 = this.mLayoutState.mAvailable;
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updateLayoutStateToFillEnd(i11, i);
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this.mLayoutState.mExtraFillSpace = i12;
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fill(recycler, this.mLayoutState, state, false);
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i = this.mLayoutState.mOffset;
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}
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}
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if (getChildCount() > 0) {
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if (this.mShouldReverseLayout ^ this.mStackFromEnd) {
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int fixLayoutEndGap2 = fixLayoutEndGap(i, recycler, state, true);
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i3 = i2 + fixLayoutEndGap2;
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i4 = i + fixLayoutEndGap2;
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fixLayoutEndGap = fixLayoutStartGap(i3, recycler, state, false);
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} else {
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int fixLayoutStartGap = fixLayoutStartGap(i2, recycler, state, true);
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i3 = i2 + fixLayoutStartGap;
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i4 = i + fixLayoutStartGap;
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fixLayoutEndGap = fixLayoutEndGap(i4, recycler, state, false);
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}
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i2 = i3 + fixLayoutEndGap;
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i = i4 + fixLayoutEndGap;
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}
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layoutForPredictiveAnimations(recycler, state, i2, i);
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if (!state.isPreLayout()) {
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this.mOrientationHelper.onLayoutComplete();
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} else {
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this.mAnchorInfo.reset();
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}
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this.mLastStackFromEnd = this.mStackFromEnd;
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}
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@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
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public void onLayoutCompleted(RecyclerView.State state) {
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super.onLayoutCompleted(state);
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this.mPendingSavedState = null;
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this.mPendingScrollPosition = -1;
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this.mPendingScrollPositionOffset = Integer.MIN_VALUE;
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this.mAnchorInfo.reset();
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}
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private void layoutForPredictiveAnimations(RecyclerView.Recycler recycler, RecyclerView.State state, int i, int i2) {
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if (!state.willRunPredictiveAnimations() || getChildCount() == 0 || state.isPreLayout() || !supportsPredictiveItemAnimations()) {
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return;
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}
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List<RecyclerView.ViewHolder> scrapList = recycler.getScrapList();
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int size = scrapList.size();
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int position = getPosition(getChildAt(0));
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int i3 = 0;
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int i4 = 0;
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for (int i5 = 0; i5 < size; i5++) {
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RecyclerView.ViewHolder viewHolder = scrapList.get(i5);
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if (!viewHolder.isRemoved()) {
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if ((viewHolder.getLayoutPosition() < position) != this.mShouldReverseLayout) {
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i3 += this.mOrientationHelper.getDecoratedMeasurement(viewHolder.itemView);
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} else {
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i4 += this.mOrientationHelper.getDecoratedMeasurement(viewHolder.itemView);
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}
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}
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}
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this.mLayoutState.mScrapList = scrapList;
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if (i3 > 0) {
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updateLayoutStateToFillStart(getPosition(getChildClosestToStart()), i);
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this.mLayoutState.mExtraFillSpace = i3;
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this.mLayoutState.mAvailable = 0;
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this.mLayoutState.assignPositionFromScrapList();
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fill(recycler, this.mLayoutState, state, false);
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}
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if (i4 > 0) {
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updateLayoutStateToFillEnd(getPosition(getChildClosestToEnd()), i2);
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this.mLayoutState.mExtraFillSpace = i4;
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this.mLayoutState.mAvailable = 0;
|
|
this.mLayoutState.assignPositionFromScrapList();
|
|
fill(recycler, this.mLayoutState, state, false);
|
|
}
|
|
this.mLayoutState.mScrapList = null;
|
|
}
|
|
|
|
private void updateAnchorInfoForLayout(RecyclerView.Recycler recycler, RecyclerView.State state, AnchorInfo anchorInfo) {
|
|
if (updateAnchorFromPendingData(state, anchorInfo) || updateAnchorFromChildren(recycler, state, anchorInfo)) {
|
|
return;
|
|
}
|
|
anchorInfo.assignCoordinateFromPadding();
|
|
anchorInfo.mPosition = this.mStackFromEnd ? state.getItemCount() - 1 : 0;
|
|
}
|
|
|
|
private boolean updateAnchorFromChildren(RecyclerView.Recycler recycler, RecyclerView.State state, AnchorInfo anchorInfo) {
|
|
View findReferenceChildClosestToStart;
|
|
int startAfterPadding;
|
|
if (getChildCount() == 0) {
|
|
return false;
|
|
}
|
|
View focusedChild = getFocusedChild();
|
|
if (focusedChild != null && anchorInfo.isViewValidAsAnchor(focusedChild, state)) {
|
|
anchorInfo.assignFromViewAndKeepVisibleRect(focusedChild, getPosition(focusedChild));
|
|
return true;
|
|
}
|
|
if (this.mLastStackFromEnd != this.mStackFromEnd) {
|
|
return false;
|
|
}
|
|
if (anchorInfo.mLayoutFromEnd) {
|
|
findReferenceChildClosestToStart = findReferenceChildClosestToEnd(recycler, state);
|
|
} else {
|
|
findReferenceChildClosestToStart = findReferenceChildClosestToStart(recycler, state);
|
|
}
|
|
if (findReferenceChildClosestToStart == null) {
|
|
return false;
|
|
}
|
|
anchorInfo.assignFromView(findReferenceChildClosestToStart, getPosition(findReferenceChildClosestToStart));
|
|
if (!state.isPreLayout() && supportsPredictiveItemAnimations() && (this.mOrientationHelper.getDecoratedStart(findReferenceChildClosestToStart) >= this.mOrientationHelper.getEndAfterPadding() || this.mOrientationHelper.getDecoratedEnd(findReferenceChildClosestToStart) < this.mOrientationHelper.getStartAfterPadding())) {
|
|
if (anchorInfo.mLayoutFromEnd) {
|
|
startAfterPadding = this.mOrientationHelper.getEndAfterPadding();
|
|
} else {
|
|
startAfterPadding = this.mOrientationHelper.getStartAfterPadding();
|
|
}
|
|
anchorInfo.mCoordinate = startAfterPadding;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private boolean updateAnchorFromPendingData(RecyclerView.State state, AnchorInfo anchorInfo) {
|
|
int i;
|
|
int decoratedStart;
|
|
if (!state.isPreLayout() && (i = this.mPendingScrollPosition) != -1) {
|
|
if (i >= 0 && i < state.getItemCount()) {
|
|
anchorInfo.mPosition = this.mPendingScrollPosition;
|
|
SavedState savedState = this.mPendingSavedState;
|
|
if (savedState != null && savedState.hasValidAnchor()) {
|
|
anchorInfo.mLayoutFromEnd = this.mPendingSavedState.mAnchorLayoutFromEnd;
|
|
if (anchorInfo.mLayoutFromEnd) {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getEndAfterPadding() - this.mPendingSavedState.mAnchorOffset;
|
|
} else {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getStartAfterPadding() + this.mPendingSavedState.mAnchorOffset;
|
|
}
|
|
return true;
|
|
}
|
|
if (this.mPendingScrollPositionOffset == Integer.MIN_VALUE) {
|
|
View findViewByPosition = findViewByPosition(this.mPendingScrollPosition);
|
|
if (findViewByPosition != null) {
|
|
if (this.mOrientationHelper.getDecoratedMeasurement(findViewByPosition) > this.mOrientationHelper.getTotalSpace()) {
|
|
anchorInfo.assignCoordinateFromPadding();
|
|
return true;
|
|
}
|
|
if (this.mOrientationHelper.getDecoratedStart(findViewByPosition) - this.mOrientationHelper.getStartAfterPadding() < 0) {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getStartAfterPadding();
|
|
anchorInfo.mLayoutFromEnd = false;
|
|
return true;
|
|
}
|
|
if (this.mOrientationHelper.getEndAfterPadding() - this.mOrientationHelper.getDecoratedEnd(findViewByPosition) < 0) {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getEndAfterPadding();
|
|
anchorInfo.mLayoutFromEnd = true;
|
|
return true;
|
|
}
|
|
if (anchorInfo.mLayoutFromEnd) {
|
|
decoratedStart = this.mOrientationHelper.getDecoratedEnd(findViewByPosition) + this.mOrientationHelper.getTotalSpaceChange();
|
|
} else {
|
|
decoratedStart = this.mOrientationHelper.getDecoratedStart(findViewByPosition);
|
|
}
|
|
anchorInfo.mCoordinate = decoratedStart;
|
|
} else {
|
|
if (getChildCount() > 0) {
|
|
anchorInfo.mLayoutFromEnd = (this.mPendingScrollPosition < getPosition(getChildAt(0))) == this.mShouldReverseLayout;
|
|
}
|
|
anchorInfo.assignCoordinateFromPadding();
|
|
}
|
|
return true;
|
|
}
|
|
anchorInfo.mLayoutFromEnd = this.mShouldReverseLayout;
|
|
if (this.mShouldReverseLayout) {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getEndAfterPadding() - this.mPendingScrollPositionOffset;
|
|
} else {
|
|
anchorInfo.mCoordinate = this.mOrientationHelper.getStartAfterPadding() + this.mPendingScrollPositionOffset;
|
|
}
|
|
return true;
|
|
}
|
|
this.mPendingScrollPosition = -1;
|
|
this.mPendingScrollPositionOffset = Integer.MIN_VALUE;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private int fixLayoutEndGap(int i, RecyclerView.Recycler recycler, RecyclerView.State state, boolean z) {
|
|
int endAfterPadding;
|
|
int endAfterPadding2 = this.mOrientationHelper.getEndAfterPadding() - i;
|
|
if (endAfterPadding2 <= 0) {
|
|
return 0;
|
|
}
|
|
int i2 = -scrollBy(-endAfterPadding2, recycler, state);
|
|
int i3 = i + i2;
|
|
if (!z || (endAfterPadding = this.mOrientationHelper.getEndAfterPadding() - i3) <= 0) {
|
|
return i2;
|
|
}
|
|
this.mOrientationHelper.offsetChildren(endAfterPadding);
|
|
return endAfterPadding + i2;
|
|
}
|
|
|
|
private int fixLayoutStartGap(int i, RecyclerView.Recycler recycler, RecyclerView.State state, boolean z) {
|
|
int startAfterPadding;
|
|
int startAfterPadding2 = i - this.mOrientationHelper.getStartAfterPadding();
|
|
if (startAfterPadding2 <= 0) {
|
|
return 0;
|
|
}
|
|
int i2 = -scrollBy(startAfterPadding2, recycler, state);
|
|
int i3 = i + i2;
|
|
if (!z || (startAfterPadding = i3 - this.mOrientationHelper.getStartAfterPadding()) <= 0) {
|
|
return i2;
|
|
}
|
|
this.mOrientationHelper.offsetChildren(-startAfterPadding);
|
|
return i2 - startAfterPadding;
|
|
}
|
|
|
|
private void updateLayoutStateToFillEnd(AnchorInfo anchorInfo) {
|
|
updateLayoutStateToFillEnd(anchorInfo.mPosition, anchorInfo.mCoordinate);
|
|
}
|
|
|
|
private void updateLayoutStateToFillEnd(int i, int i2) {
|
|
this.mLayoutState.mAvailable = this.mOrientationHelper.getEndAfterPadding() - i2;
|
|
this.mLayoutState.mItemDirection = this.mShouldReverseLayout ? -1 : 1;
|
|
this.mLayoutState.mCurrentPosition = i;
|
|
this.mLayoutState.mLayoutDirection = 1;
|
|
this.mLayoutState.mOffset = i2;
|
|
this.mLayoutState.mScrollingOffset = Integer.MIN_VALUE;
|
|
}
|
|
|
|
private void updateLayoutStateToFillStart(AnchorInfo anchorInfo) {
|
|
updateLayoutStateToFillStart(anchorInfo.mPosition, anchorInfo.mCoordinate);
|
|
}
|
|
|
|
private void updateLayoutStateToFillStart(int i, int i2) {
|
|
this.mLayoutState.mAvailable = i2 - this.mOrientationHelper.getStartAfterPadding();
|
|
this.mLayoutState.mCurrentPosition = i;
|
|
this.mLayoutState.mItemDirection = this.mShouldReverseLayout ? 1 : -1;
|
|
this.mLayoutState.mLayoutDirection = -1;
|
|
this.mLayoutState.mOffset = i2;
|
|
this.mLayoutState.mScrollingOffset = Integer.MIN_VALUE;
|
|
}
|
|
|
|
protected boolean isLayoutRTL() {
|
|
return getLayoutDirection() == 1;
|
|
}
|
|
|
|
void ensureLayoutState() {
|
|
if (this.mLayoutState == null) {
|
|
this.mLayoutState = createLayoutState();
|
|
}
|
|
}
|
|
|
|
LayoutState createLayoutState() {
|
|
return new LayoutState();
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public void scrollToPosition(int i) {
|
|
this.mPendingScrollPosition = i;
|
|
this.mPendingScrollPositionOffset = Integer.MIN_VALUE;
|
|
SavedState savedState = this.mPendingSavedState;
|
|
if (savedState != null) {
|
|
savedState.invalidateAnchor();
|
|
}
|
|
requestLayout();
|
|
}
|
|
|
|
public void scrollToPositionWithOffset(int i, int i2) {
|
|
this.mPendingScrollPosition = i;
|
|
this.mPendingScrollPositionOffset = i2;
|
|
SavedState savedState = this.mPendingSavedState;
|
|
if (savedState != null) {
|
|
savedState.invalidateAnchor();
|
|
}
|
|
requestLayout();
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int scrollHorizontallyBy(int i, RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
if (this.mOrientation == 1) {
|
|
return 0;
|
|
}
|
|
return scrollBy(i, recycler, state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int scrollVerticallyBy(int i, RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
if (this.mOrientation == 0) {
|
|
return 0;
|
|
}
|
|
return scrollBy(i, recycler, state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeHorizontalScrollOffset(RecyclerView.State state) {
|
|
return computeScrollOffset(state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeVerticalScrollOffset(RecyclerView.State state) {
|
|
return computeScrollOffset(state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeHorizontalScrollExtent(RecyclerView.State state) {
|
|
return computeScrollExtent(state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeVerticalScrollExtent(RecyclerView.State state) {
|
|
return computeScrollExtent(state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeHorizontalScrollRange(RecyclerView.State state) {
|
|
return computeScrollRange(state);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public int computeVerticalScrollRange(RecyclerView.State state) {
|
|
return computeScrollRange(state);
|
|
}
|
|
|
|
private int computeScrollOffset(RecyclerView.State state) {
|
|
if (getChildCount() == 0) {
|
|
return 0;
|
|
}
|
|
ensureLayoutState();
|
|
return ScrollbarHelper.computeScrollOffset(state, this.mOrientationHelper, findFirstVisibleChildClosestToStart(!this.mSmoothScrollbarEnabled, true), findFirstVisibleChildClosestToEnd(!this.mSmoothScrollbarEnabled, true), this, this.mSmoothScrollbarEnabled, this.mShouldReverseLayout);
|
|
}
|
|
|
|
private int computeScrollExtent(RecyclerView.State state) {
|
|
if (getChildCount() == 0) {
|
|
return 0;
|
|
}
|
|
ensureLayoutState();
|
|
return ScrollbarHelper.computeScrollExtent(state, this.mOrientationHelper, findFirstVisibleChildClosestToStart(!this.mSmoothScrollbarEnabled, true), findFirstVisibleChildClosestToEnd(!this.mSmoothScrollbarEnabled, true), this, this.mSmoothScrollbarEnabled);
|
|
}
|
|
|
|
private int computeScrollRange(RecyclerView.State state) {
|
|
if (getChildCount() == 0) {
|
|
return 0;
|
|
}
|
|
ensureLayoutState();
|
|
return ScrollbarHelper.computeScrollRange(state, this.mOrientationHelper, findFirstVisibleChildClosestToStart(!this.mSmoothScrollbarEnabled, true), findFirstVisibleChildClosestToEnd(!this.mSmoothScrollbarEnabled, true), this, this.mSmoothScrollbarEnabled);
|
|
}
|
|
|
|
private void updateLayoutState(int i, int i2, boolean z, RecyclerView.State state) {
|
|
int startAfterPadding;
|
|
this.mLayoutState.mInfinite = resolveIsInfinite();
|
|
this.mLayoutState.mLayoutDirection = i;
|
|
int[] iArr = this.mReusableIntPair;
|
|
iArr[0] = 0;
|
|
iArr[1] = 0;
|
|
calculateExtraLayoutSpace(state, iArr);
|
|
int max = Math.max(0, this.mReusableIntPair[0]);
|
|
int max2 = Math.max(0, this.mReusableIntPair[1]);
|
|
boolean z2 = i == 1;
|
|
this.mLayoutState.mExtraFillSpace = z2 ? max2 : max;
|
|
LayoutState layoutState = this.mLayoutState;
|
|
if (!z2) {
|
|
max = max2;
|
|
}
|
|
layoutState.mNoRecycleSpace = max;
|
|
if (z2) {
|
|
this.mLayoutState.mExtraFillSpace += this.mOrientationHelper.getEndPadding();
|
|
View childClosestToEnd = getChildClosestToEnd();
|
|
this.mLayoutState.mItemDirection = this.mShouldReverseLayout ? -1 : 1;
|
|
this.mLayoutState.mCurrentPosition = getPosition(childClosestToEnd) + this.mLayoutState.mItemDirection;
|
|
this.mLayoutState.mOffset = this.mOrientationHelper.getDecoratedEnd(childClosestToEnd);
|
|
startAfterPadding = this.mOrientationHelper.getDecoratedEnd(childClosestToEnd) - this.mOrientationHelper.getEndAfterPadding();
|
|
} else {
|
|
View childClosestToStart = getChildClosestToStart();
|
|
this.mLayoutState.mExtraFillSpace += this.mOrientationHelper.getStartAfterPadding();
|
|
this.mLayoutState.mItemDirection = this.mShouldReverseLayout ? 1 : -1;
|
|
this.mLayoutState.mCurrentPosition = getPosition(childClosestToStart) + this.mLayoutState.mItemDirection;
|
|
this.mLayoutState.mOffset = this.mOrientationHelper.getDecoratedStart(childClosestToStart);
|
|
startAfterPadding = (-this.mOrientationHelper.getDecoratedStart(childClosestToStart)) + this.mOrientationHelper.getStartAfterPadding();
|
|
}
|
|
this.mLayoutState.mAvailable = i2;
|
|
if (z) {
|
|
this.mLayoutState.mAvailable -= startAfterPadding;
|
|
}
|
|
this.mLayoutState.mScrollingOffset = startAfterPadding;
|
|
}
|
|
|
|
boolean resolveIsInfinite() {
|
|
return this.mOrientationHelper.getMode() == 0 && this.mOrientationHelper.getEnd() == 0;
|
|
}
|
|
|
|
void collectPrefetchPositionsForLayoutState(RecyclerView.State state, LayoutState layoutState, RecyclerView.LayoutManager.LayoutPrefetchRegistry layoutPrefetchRegistry) {
|
|
int i = layoutState.mCurrentPosition;
|
|
if (i < 0 || i >= state.getItemCount()) {
|
|
return;
|
|
}
|
|
layoutPrefetchRegistry.addPosition(i, Math.max(0, layoutState.mScrollingOffset));
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public void collectInitialPrefetchPositions(int i, RecyclerView.LayoutManager.LayoutPrefetchRegistry layoutPrefetchRegistry) {
|
|
boolean z;
|
|
int i2;
|
|
SavedState savedState = this.mPendingSavedState;
|
|
if (savedState != null && savedState.hasValidAnchor()) {
|
|
z = this.mPendingSavedState.mAnchorLayoutFromEnd;
|
|
i2 = this.mPendingSavedState.mAnchorPosition;
|
|
} else {
|
|
resolveShouldLayoutReverse();
|
|
z = this.mShouldReverseLayout;
|
|
i2 = this.mPendingScrollPosition;
|
|
if (i2 == -1) {
|
|
i2 = z ? i - 1 : 0;
|
|
}
|
|
}
|
|
int i3 = z ? -1 : 1;
|
|
for (int i4 = 0; i4 < this.mInitialPrefetchItemCount && i2 >= 0 && i2 < i; i4++) {
|
|
layoutPrefetchRegistry.addPosition(i2, 0);
|
|
i2 += i3;
|
|
}
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public void collectAdjacentPrefetchPositions(int i, int i2, RecyclerView.State state, RecyclerView.LayoutManager.LayoutPrefetchRegistry layoutPrefetchRegistry) {
|
|
if (this.mOrientation != 0) {
|
|
i = i2;
|
|
}
|
|
if (getChildCount() == 0 || i == 0) {
|
|
return;
|
|
}
|
|
ensureLayoutState();
|
|
updateLayoutState(i > 0 ? 1 : -1, Math.abs(i), true, state);
|
|
collectPrefetchPositionsForLayoutState(state, this.mLayoutState, layoutPrefetchRegistry);
|
|
}
|
|
|
|
int scrollBy(int i, RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
if (getChildCount() == 0 || i == 0) {
|
|
return 0;
|
|
}
|
|
ensureLayoutState();
|
|
this.mLayoutState.mRecycle = true;
|
|
int i2 = i > 0 ? 1 : -1;
|
|
int abs = Math.abs(i);
|
|
updateLayoutState(i2, abs, true, state);
|
|
int fill = this.mLayoutState.mScrollingOffset + fill(recycler, this.mLayoutState, state, false);
|
|
if (fill < 0) {
|
|
return 0;
|
|
}
|
|
if (abs > fill) {
|
|
i = i2 * fill;
|
|
}
|
|
this.mOrientationHelper.offsetChildren(-i);
|
|
this.mLayoutState.mLastScrollDelta = i;
|
|
return i;
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public void assertNotInLayoutOrScroll(String str) {
|
|
if (this.mPendingSavedState == null) {
|
|
super.assertNotInLayoutOrScroll(str);
|
|
}
|
|
}
|
|
|
|
private void recycleChildren(RecyclerView.Recycler recycler, int i, int i2) {
|
|
if (i == i2) {
|
|
return;
|
|
}
|
|
if (i2 <= i) {
|
|
while (i > i2) {
|
|
removeAndRecycleViewAt(i, recycler);
|
|
i--;
|
|
}
|
|
} else {
|
|
for (int i3 = i2 - 1; i3 >= i; i3--) {
|
|
removeAndRecycleViewAt(i3, recycler);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void recycleViewsFromStart(RecyclerView.Recycler recycler, int i, int i2) {
|
|
if (i < 0) {
|
|
return;
|
|
}
|
|
int i3 = i - i2;
|
|
int childCount = getChildCount();
|
|
if (!this.mShouldReverseLayout) {
|
|
for (int i4 = 0; i4 < childCount; i4++) {
|
|
View childAt = getChildAt(i4);
|
|
if (this.mOrientationHelper.getDecoratedEnd(childAt) > i3 || this.mOrientationHelper.getTransformedEndWithDecoration(childAt) > i3) {
|
|
recycleChildren(recycler, 0, i4);
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
int i5 = childCount - 1;
|
|
for (int i6 = i5; i6 >= 0; i6--) {
|
|
View childAt2 = getChildAt(i6);
|
|
if (this.mOrientationHelper.getDecoratedEnd(childAt2) > i3 || this.mOrientationHelper.getTransformedEndWithDecoration(childAt2) > i3) {
|
|
recycleChildren(recycler, i5, i6);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void recycleViewsFromEnd(RecyclerView.Recycler recycler, int i, int i2) {
|
|
int childCount = getChildCount();
|
|
if (i < 0) {
|
|
return;
|
|
}
|
|
int end = (this.mOrientationHelper.getEnd() - i) + i2;
|
|
if (this.mShouldReverseLayout) {
|
|
for (int i3 = 0; i3 < childCount; i3++) {
|
|
View childAt = getChildAt(i3);
|
|
if (this.mOrientationHelper.getDecoratedStart(childAt) < end || this.mOrientationHelper.getTransformedStartWithDecoration(childAt) < end) {
|
|
recycleChildren(recycler, 0, i3);
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
int i4 = childCount - 1;
|
|
for (int i5 = i4; i5 >= 0; i5--) {
|
|
View childAt2 = getChildAt(i5);
|
|
if (this.mOrientationHelper.getDecoratedStart(childAt2) < end || this.mOrientationHelper.getTransformedStartWithDecoration(childAt2) < end) {
|
|
recycleChildren(recycler, i4, i5);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void recycleByLayoutState(RecyclerView.Recycler recycler, LayoutState layoutState) {
|
|
if (!layoutState.mRecycle || layoutState.mInfinite) {
|
|
return;
|
|
}
|
|
int i = layoutState.mScrollingOffset;
|
|
int i2 = layoutState.mNoRecycleSpace;
|
|
if (layoutState.mLayoutDirection == -1) {
|
|
recycleViewsFromEnd(recycler, i, i2);
|
|
} else {
|
|
recycleViewsFromStart(recycler, i, i2);
|
|
}
|
|
}
|
|
|
|
int fill(RecyclerView.Recycler recycler, LayoutState layoutState, RecyclerView.State state, boolean z) {
|
|
int i = layoutState.mAvailable;
|
|
if (layoutState.mScrollingOffset != Integer.MIN_VALUE) {
|
|
if (layoutState.mAvailable < 0) {
|
|
layoutState.mScrollingOffset += layoutState.mAvailable;
|
|
}
|
|
recycleByLayoutState(recycler, layoutState);
|
|
}
|
|
int i2 = layoutState.mAvailable + layoutState.mExtraFillSpace;
|
|
LayoutChunkResult layoutChunkResult = this.mLayoutChunkResult;
|
|
while (true) {
|
|
if ((!layoutState.mInfinite && i2 <= 0) || !layoutState.hasMore(state)) {
|
|
break;
|
|
}
|
|
layoutChunkResult.resetInternal();
|
|
layoutChunk(recycler, state, layoutState, layoutChunkResult);
|
|
if (!layoutChunkResult.mFinished) {
|
|
layoutState.mOffset += layoutChunkResult.mConsumed * layoutState.mLayoutDirection;
|
|
if (!layoutChunkResult.mIgnoreConsumed || layoutState.mScrapList != null || !state.isPreLayout()) {
|
|
layoutState.mAvailable -= layoutChunkResult.mConsumed;
|
|
i2 -= layoutChunkResult.mConsumed;
|
|
}
|
|
if (layoutState.mScrollingOffset != Integer.MIN_VALUE) {
|
|
layoutState.mScrollingOffset += layoutChunkResult.mConsumed;
|
|
if (layoutState.mAvailable < 0) {
|
|
layoutState.mScrollingOffset += layoutState.mAvailable;
|
|
}
|
|
recycleByLayoutState(recycler, layoutState);
|
|
}
|
|
if (z && layoutChunkResult.mFocusable) {
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return i - layoutState.mAvailable;
|
|
}
|
|
|
|
void layoutChunk(RecyclerView.Recycler recycler, RecyclerView.State state, LayoutState layoutState, LayoutChunkResult layoutChunkResult) {
|
|
int i;
|
|
int i2;
|
|
int i3;
|
|
int i4;
|
|
int decoratedMeasurementInOther;
|
|
View next = layoutState.next(recycler);
|
|
if (next == null) {
|
|
layoutChunkResult.mFinished = true;
|
|
return;
|
|
}
|
|
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) next.getLayoutParams();
|
|
if (layoutState.mScrapList == null) {
|
|
if (this.mShouldReverseLayout == (layoutState.mLayoutDirection == -1)) {
|
|
addView(next);
|
|
} else {
|
|
addView(next, 0);
|
|
}
|
|
} else {
|
|
if (this.mShouldReverseLayout == (layoutState.mLayoutDirection == -1)) {
|
|
addDisappearingView(next);
|
|
} else {
|
|
addDisappearingView(next, 0);
|
|
}
|
|
}
|
|
measureChildWithMargins(next, 0, 0);
|
|
layoutChunkResult.mConsumed = this.mOrientationHelper.getDecoratedMeasurement(next);
|
|
if (this.mOrientation == 1) {
|
|
if (isLayoutRTL()) {
|
|
decoratedMeasurementInOther = getWidth() - getPaddingRight();
|
|
i4 = decoratedMeasurementInOther - this.mOrientationHelper.getDecoratedMeasurementInOther(next);
|
|
} else {
|
|
i4 = getPaddingLeft();
|
|
decoratedMeasurementInOther = this.mOrientationHelper.getDecoratedMeasurementInOther(next) + i4;
|
|
}
|
|
if (layoutState.mLayoutDirection == -1) {
|
|
int i5 = layoutState.mOffset;
|
|
i2 = layoutState.mOffset - layoutChunkResult.mConsumed;
|
|
i = decoratedMeasurementInOther;
|
|
i3 = i5;
|
|
} else {
|
|
int i6 = layoutState.mOffset;
|
|
i3 = layoutState.mOffset + layoutChunkResult.mConsumed;
|
|
i = decoratedMeasurementInOther;
|
|
i2 = i6;
|
|
}
|
|
} else {
|
|
int paddingTop = getPaddingTop();
|
|
int decoratedMeasurementInOther2 = this.mOrientationHelper.getDecoratedMeasurementInOther(next) + paddingTop;
|
|
if (layoutState.mLayoutDirection == -1) {
|
|
i2 = paddingTop;
|
|
i = layoutState.mOffset;
|
|
i3 = decoratedMeasurementInOther2;
|
|
i4 = layoutState.mOffset - layoutChunkResult.mConsumed;
|
|
} else {
|
|
int i7 = layoutState.mOffset;
|
|
i = layoutState.mOffset + layoutChunkResult.mConsumed;
|
|
i2 = paddingTop;
|
|
i3 = decoratedMeasurementInOther2;
|
|
i4 = i7;
|
|
}
|
|
}
|
|
layoutDecoratedWithMargins(next, i4, i2, i, i3);
|
|
if (layoutParams.isItemRemoved() || layoutParams.isItemChanged()) {
|
|
layoutChunkResult.mIgnoreConsumed = true;
|
|
}
|
|
layoutChunkResult.mFocusable = next.hasFocusable();
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
boolean shouldMeasureTwice() {
|
|
return (getHeightMode() == 1073741824 || getWidthMode() == 1073741824 || !hasFlexibleChildInBothOrientations()) ? false : true;
|
|
}
|
|
|
|
int convertFocusDirectionToLayoutDirection(int i) {
|
|
return i != 1 ? i != 2 ? i != 17 ? i != 33 ? i != 66 ? (i == 130 && this.mOrientation == 1) ? 1 : Integer.MIN_VALUE : this.mOrientation == 0 ? 1 : Integer.MIN_VALUE : this.mOrientation == 1 ? -1 : Integer.MIN_VALUE : this.mOrientation == 0 ? -1 : Integer.MIN_VALUE : (this.mOrientation != 1 && isLayoutRTL()) ? -1 : 1 : (this.mOrientation != 1 && isLayoutRTL()) ? 1 : -1;
|
|
}
|
|
|
|
private View getChildClosestToStart() {
|
|
return getChildAt(this.mShouldReverseLayout ? getChildCount() - 1 : 0);
|
|
}
|
|
|
|
private View getChildClosestToEnd() {
|
|
return getChildAt(this.mShouldReverseLayout ? 0 : getChildCount() - 1);
|
|
}
|
|
|
|
View findFirstVisibleChildClosestToStart(boolean z, boolean z2) {
|
|
if (this.mShouldReverseLayout) {
|
|
return findOneVisibleChild(getChildCount() - 1, -1, z, z2);
|
|
}
|
|
return findOneVisibleChild(0, getChildCount(), z, z2);
|
|
}
|
|
|
|
View findFirstVisibleChildClosestToEnd(boolean z, boolean z2) {
|
|
if (this.mShouldReverseLayout) {
|
|
return findOneVisibleChild(0, getChildCount(), z, z2);
|
|
}
|
|
return findOneVisibleChild(getChildCount() - 1, -1, z, z2);
|
|
}
|
|
|
|
private View findReferenceChildClosestToEnd(RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
if (this.mShouldReverseLayout) {
|
|
return findFirstReferenceChild(recycler, state);
|
|
}
|
|
return findLastReferenceChild(recycler, state);
|
|
}
|
|
|
|
private View findReferenceChildClosestToStart(RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
if (this.mShouldReverseLayout) {
|
|
return findLastReferenceChild(recycler, state);
|
|
}
|
|
return findFirstReferenceChild(recycler, state);
|
|
}
|
|
|
|
private View findFirstReferenceChild(RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
return findReferenceChild(recycler, state, 0, getChildCount(), state.getItemCount());
|
|
}
|
|
|
|
private View findLastReferenceChild(RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
return findReferenceChild(recycler, state, getChildCount() - 1, -1, state.getItemCount());
|
|
}
|
|
|
|
View findReferenceChild(RecyclerView.Recycler recycler, RecyclerView.State state, int i, int i2, int i3) {
|
|
ensureLayoutState();
|
|
int startAfterPadding = this.mOrientationHelper.getStartAfterPadding();
|
|
int endAfterPadding = this.mOrientationHelper.getEndAfterPadding();
|
|
int i4 = i2 > i ? 1 : -1;
|
|
View view = null;
|
|
View view2 = null;
|
|
while (i != i2) {
|
|
View childAt = getChildAt(i);
|
|
int position = getPosition(childAt);
|
|
if (position >= 0 && position < i3) {
|
|
if (((RecyclerView.LayoutParams) childAt.getLayoutParams()).isItemRemoved()) {
|
|
if (view2 == null) {
|
|
view2 = childAt;
|
|
}
|
|
} else {
|
|
if (this.mOrientationHelper.getDecoratedStart(childAt) < endAfterPadding && this.mOrientationHelper.getDecoratedEnd(childAt) >= startAfterPadding) {
|
|
return childAt;
|
|
}
|
|
if (view == null) {
|
|
view = childAt;
|
|
}
|
|
}
|
|
}
|
|
i += i4;
|
|
}
|
|
return view != null ? view : view2;
|
|
}
|
|
|
|
private View findPartiallyOrCompletelyInvisibleChildClosestToEnd() {
|
|
if (this.mShouldReverseLayout) {
|
|
return findFirstPartiallyOrCompletelyInvisibleChild();
|
|
}
|
|
return findLastPartiallyOrCompletelyInvisibleChild();
|
|
}
|
|
|
|
private View findPartiallyOrCompletelyInvisibleChildClosestToStart() {
|
|
if (this.mShouldReverseLayout) {
|
|
return findLastPartiallyOrCompletelyInvisibleChild();
|
|
}
|
|
return findFirstPartiallyOrCompletelyInvisibleChild();
|
|
}
|
|
|
|
private View findFirstPartiallyOrCompletelyInvisibleChild() {
|
|
return findOnePartiallyOrCompletelyInvisibleChild(0, getChildCount());
|
|
}
|
|
|
|
private View findLastPartiallyOrCompletelyInvisibleChild() {
|
|
return findOnePartiallyOrCompletelyInvisibleChild(getChildCount() - 1, -1);
|
|
}
|
|
|
|
public int findFirstVisibleItemPosition() {
|
|
View findOneVisibleChild = findOneVisibleChild(0, getChildCount(), false, true);
|
|
if (findOneVisibleChild == null) {
|
|
return -1;
|
|
}
|
|
return getPosition(findOneVisibleChild);
|
|
}
|
|
|
|
public int findFirstCompletelyVisibleItemPosition() {
|
|
View findOneVisibleChild = findOneVisibleChild(0, getChildCount(), true, false);
|
|
if (findOneVisibleChild == null) {
|
|
return -1;
|
|
}
|
|
return getPosition(findOneVisibleChild);
|
|
}
|
|
|
|
public int findLastVisibleItemPosition() {
|
|
View findOneVisibleChild = findOneVisibleChild(getChildCount() - 1, -1, false, true);
|
|
if (findOneVisibleChild == null) {
|
|
return -1;
|
|
}
|
|
return getPosition(findOneVisibleChild);
|
|
}
|
|
|
|
public int findLastCompletelyVisibleItemPosition() {
|
|
View findOneVisibleChild = findOneVisibleChild(getChildCount() - 1, -1, true, false);
|
|
if (findOneVisibleChild == null) {
|
|
return -1;
|
|
}
|
|
return getPosition(findOneVisibleChild);
|
|
}
|
|
|
|
View findOneVisibleChild(int i, int i2, boolean z, boolean z2) {
|
|
ensureLayoutState();
|
|
int i3 = z ? 24579 : 320;
|
|
int i4 = z2 ? 320 : 0;
|
|
if (this.mOrientation == 0) {
|
|
return this.mHorizontalBoundCheck.findOneViewWithinBoundFlags(i, i2, i3, i4);
|
|
}
|
|
return this.mVerticalBoundCheck.findOneViewWithinBoundFlags(i, i2, i3, i4);
|
|
}
|
|
|
|
View findOnePartiallyOrCompletelyInvisibleChild(int i, int i2) {
|
|
int i3;
|
|
int i4;
|
|
ensureLayoutState();
|
|
if (i2 <= i && i2 >= i) {
|
|
return getChildAt(i);
|
|
}
|
|
if (this.mOrientationHelper.getDecoratedStart(getChildAt(i)) < this.mOrientationHelper.getStartAfterPadding()) {
|
|
i3 = 16644;
|
|
i4 = 16388;
|
|
} else {
|
|
i3 = 4161;
|
|
i4 = FragmentTransaction.TRANSIT_FRAGMENT_OPEN;
|
|
}
|
|
if (this.mOrientation == 0) {
|
|
return this.mHorizontalBoundCheck.findOneViewWithinBoundFlags(i, i2, i3, i4);
|
|
}
|
|
return this.mVerticalBoundCheck.findOneViewWithinBoundFlags(i, i2, i3, i4);
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.RecyclerView.LayoutManager
|
|
public View onFocusSearchFailed(View view, int i, RecyclerView.Recycler recycler, RecyclerView.State state) {
|
|
int convertFocusDirectionToLayoutDirection;
|
|
View findPartiallyOrCompletelyInvisibleChildClosestToEnd;
|
|
View childClosestToEnd;
|
|
resolveShouldLayoutReverse();
|
|
if (getChildCount() == 0 || (convertFocusDirectionToLayoutDirection = convertFocusDirectionToLayoutDirection(i)) == Integer.MIN_VALUE) {
|
|
return null;
|
|
}
|
|
ensureLayoutState();
|
|
updateLayoutState(convertFocusDirectionToLayoutDirection, (int) (this.mOrientationHelper.getTotalSpace() * MAX_SCROLL_FACTOR), false, state);
|
|
this.mLayoutState.mScrollingOffset = Integer.MIN_VALUE;
|
|
this.mLayoutState.mRecycle = false;
|
|
fill(recycler, this.mLayoutState, state, true);
|
|
if (convertFocusDirectionToLayoutDirection == -1) {
|
|
findPartiallyOrCompletelyInvisibleChildClosestToEnd = findPartiallyOrCompletelyInvisibleChildClosestToStart();
|
|
} else {
|
|
findPartiallyOrCompletelyInvisibleChildClosestToEnd = findPartiallyOrCompletelyInvisibleChildClosestToEnd();
|
|
}
|
|
if (convertFocusDirectionToLayoutDirection == -1) {
|
|
childClosestToEnd = getChildClosestToStart();
|
|
} else {
|
|
childClosestToEnd = getChildClosestToEnd();
|
|
}
|
|
if (!childClosestToEnd.hasFocusable()) {
|
|
return findPartiallyOrCompletelyInvisibleChildClosestToEnd;
|
|
}
|
|
if (findPartiallyOrCompletelyInvisibleChildClosestToEnd == null) {
|
|
return null;
|
|
}
|
|
return childClosestToEnd;
|
|
}
|
|
|
|
private void logChildren() {
|
|
Log.d(TAG, "internal representation of views on the screen");
|
|
for (int i = 0; i < getChildCount(); i++) {
|
|
View childAt = getChildAt(i);
|
|
Log.d(TAG, "item " + getPosition(childAt) + ", coord:" + this.mOrientationHelper.getDecoratedStart(childAt));
|
|
}
|
|
Log.d(TAG, "==============");
|
|
}
|
|
|
|
void validateChildOrder() {
|
|
Log.d(TAG, "validating child count " + getChildCount());
|
|
if (getChildCount() < 1) {
|
|
return;
|
|
}
|
|
int position = getPosition(getChildAt(0));
|
|
int decoratedStart = this.mOrientationHelper.getDecoratedStart(getChildAt(0));
|
|
if (this.mShouldReverseLayout) {
|
|
for (int i = 1; i < getChildCount(); i++) {
|
|
View childAt = getChildAt(i);
|
|
int position2 = getPosition(childAt);
|
|
int decoratedStart2 = this.mOrientationHelper.getDecoratedStart(childAt);
|
|
if (position2 < position) {
|
|
logChildren();
|
|
StringBuilder sb = new StringBuilder("detected invalid position. loc invalid? ");
|
|
sb.append(decoratedStart2 < decoratedStart);
|
|
throw new RuntimeException(sb.toString());
|
|
}
|
|
if (decoratedStart2 > decoratedStart) {
|
|
logChildren();
|
|
throw new RuntimeException("detected invalid location");
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
for (int i2 = 1; i2 < getChildCount(); i2++) {
|
|
View childAt2 = getChildAt(i2);
|
|
int position3 = getPosition(childAt2);
|
|
int decoratedStart3 = this.mOrientationHelper.getDecoratedStart(childAt2);
|
|
if (position3 < position) {
|
|
logChildren();
|
|
StringBuilder sb2 = new StringBuilder("detected invalid position. loc invalid? ");
|
|
sb2.append(decoratedStart3 < decoratedStart);
|
|
throw new RuntimeException(sb2.toString());
|
|
}
|
|
if (decoratedStart3 < decoratedStart) {
|
|
logChildren();
|
|
throw new RuntimeException("detected invalid location");
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override // androidx.recyclerview.widget.ItemTouchHelper.ViewDropHandler
|
|
public void prepareForDrop(View view, View view2, int i, int i2) {
|
|
assertNotInLayoutOrScroll("Cannot drop a view during a scroll or layout calculation");
|
|
ensureLayoutState();
|
|
resolveShouldLayoutReverse();
|
|
int position = getPosition(view);
|
|
int position2 = getPosition(view2);
|
|
char c = position < position2 ? (char) 1 : (char) 65535;
|
|
if (this.mShouldReverseLayout) {
|
|
if (c == 1) {
|
|
scrollToPositionWithOffset(position2, this.mOrientationHelper.getEndAfterPadding() - (this.mOrientationHelper.getDecoratedStart(view2) + this.mOrientationHelper.getDecoratedMeasurement(view)));
|
|
return;
|
|
} else {
|
|
scrollToPositionWithOffset(position2, this.mOrientationHelper.getEndAfterPadding() - this.mOrientationHelper.getDecoratedEnd(view2));
|
|
return;
|
|
}
|
|
}
|
|
if (c == 65535) {
|
|
scrollToPositionWithOffset(position2, this.mOrientationHelper.getDecoratedStart(view2));
|
|
} else {
|
|
scrollToPositionWithOffset(position2, this.mOrientationHelper.getDecoratedEnd(view2) - this.mOrientationHelper.getDecoratedMeasurement(view));
|
|
}
|
|
}
|
|
|
|
static class LayoutState {
|
|
static final int INVALID_LAYOUT = Integer.MIN_VALUE;
|
|
static final int ITEM_DIRECTION_HEAD = -1;
|
|
static final int ITEM_DIRECTION_TAIL = 1;
|
|
static final int LAYOUT_END = 1;
|
|
static final int LAYOUT_START = -1;
|
|
static final int SCROLLING_OFFSET_NaN = Integer.MIN_VALUE;
|
|
static final String TAG = "LLM#LayoutState";
|
|
int mAvailable;
|
|
int mCurrentPosition;
|
|
boolean mInfinite;
|
|
int mItemDirection;
|
|
int mLastScrollDelta;
|
|
int mLayoutDirection;
|
|
int mOffset;
|
|
int mScrollingOffset;
|
|
boolean mRecycle = true;
|
|
int mExtraFillSpace = 0;
|
|
int mNoRecycleSpace = 0;
|
|
boolean mIsPreLayout = false;
|
|
List<RecyclerView.ViewHolder> mScrapList = null;
|
|
|
|
LayoutState() {
|
|
}
|
|
|
|
boolean hasMore(RecyclerView.State state) {
|
|
int i = this.mCurrentPosition;
|
|
return i >= 0 && i < state.getItemCount();
|
|
}
|
|
|
|
View next(RecyclerView.Recycler recycler) {
|
|
if (this.mScrapList != null) {
|
|
return nextViewFromScrapList();
|
|
}
|
|
View viewForPosition = recycler.getViewForPosition(this.mCurrentPosition);
|
|
this.mCurrentPosition += this.mItemDirection;
|
|
return viewForPosition;
|
|
}
|
|
|
|
private View nextViewFromScrapList() {
|
|
int size = this.mScrapList.size();
|
|
for (int i = 0; i < size; i++) {
|
|
View view = this.mScrapList.get(i).itemView;
|
|
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
|
|
if (!layoutParams.isItemRemoved() && this.mCurrentPosition == layoutParams.getViewLayoutPosition()) {
|
|
assignPositionFromScrapList(view);
|
|
return view;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public void assignPositionFromScrapList() {
|
|
assignPositionFromScrapList(null);
|
|
}
|
|
|
|
public void assignPositionFromScrapList(View view) {
|
|
View nextViewInLimitedList = nextViewInLimitedList(view);
|
|
if (nextViewInLimitedList == null) {
|
|
this.mCurrentPosition = -1;
|
|
} else {
|
|
this.mCurrentPosition = ((RecyclerView.LayoutParams) nextViewInLimitedList.getLayoutParams()).getViewLayoutPosition();
|
|
}
|
|
}
|
|
|
|
public View nextViewInLimitedList(View view) {
|
|
int viewLayoutPosition;
|
|
int size = this.mScrapList.size();
|
|
View view2 = null;
|
|
int i = Integer.MAX_VALUE;
|
|
for (int i2 = 0; i2 < size; i2++) {
|
|
View view3 = this.mScrapList.get(i2).itemView;
|
|
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view3.getLayoutParams();
|
|
if (view3 != view && !layoutParams.isItemRemoved() && (viewLayoutPosition = (layoutParams.getViewLayoutPosition() - this.mCurrentPosition) * this.mItemDirection) >= 0 && viewLayoutPosition < i) {
|
|
view2 = view3;
|
|
if (viewLayoutPosition == 0) {
|
|
break;
|
|
}
|
|
i = viewLayoutPosition;
|
|
}
|
|
}
|
|
return view2;
|
|
}
|
|
|
|
void log() {
|
|
Log.d(TAG, "avail:" + this.mAvailable + ", ind:" + this.mCurrentPosition + ", dir:" + this.mItemDirection + ", offset:" + this.mOffset + ", layoutDir:" + this.mLayoutDirection);
|
|
}
|
|
}
|
|
|
|
public static class SavedState implements Parcelable {
|
|
public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() { // from class: androidx.recyclerview.widget.LinearLayoutManager.SavedState.1
|
|
/* JADX WARN: Can't rename method to resolve collision */
|
|
@Override // android.os.Parcelable.Creator
|
|
public SavedState createFromParcel(Parcel parcel) {
|
|
return new SavedState(parcel);
|
|
}
|
|
|
|
/* JADX WARN: Can't rename method to resolve collision */
|
|
@Override // android.os.Parcelable.Creator
|
|
public SavedState[] newArray(int i) {
|
|
return new SavedState[i];
|
|
}
|
|
};
|
|
boolean mAnchorLayoutFromEnd;
|
|
int mAnchorOffset;
|
|
int mAnchorPosition;
|
|
|
|
@Override // android.os.Parcelable
|
|
public int describeContents() {
|
|
return 0;
|
|
}
|
|
|
|
boolean hasValidAnchor() {
|
|
return this.mAnchorPosition >= 0;
|
|
}
|
|
|
|
void invalidateAnchor() {
|
|
this.mAnchorPosition = -1;
|
|
}
|
|
|
|
public SavedState() {
|
|
}
|
|
|
|
SavedState(Parcel parcel) {
|
|
this.mAnchorPosition = parcel.readInt();
|
|
this.mAnchorOffset = parcel.readInt();
|
|
this.mAnchorLayoutFromEnd = parcel.readInt() == 1;
|
|
}
|
|
|
|
public SavedState(SavedState savedState) {
|
|
this.mAnchorPosition = savedState.mAnchorPosition;
|
|
this.mAnchorOffset = savedState.mAnchorOffset;
|
|
this.mAnchorLayoutFromEnd = savedState.mAnchorLayoutFromEnd;
|
|
}
|
|
|
|
@Override // android.os.Parcelable
|
|
public void writeToParcel(Parcel parcel, int i) {
|
|
parcel.writeInt(this.mAnchorPosition);
|
|
parcel.writeInt(this.mAnchorOffset);
|
|
parcel.writeInt(this.mAnchorLayoutFromEnd ? 1 : 0);
|
|
}
|
|
}
|
|
|
|
static class AnchorInfo {
|
|
int mCoordinate;
|
|
boolean mLayoutFromEnd;
|
|
OrientationHelper mOrientationHelper;
|
|
int mPosition;
|
|
boolean mValid;
|
|
|
|
void reset() {
|
|
this.mPosition = -1;
|
|
this.mCoordinate = Integer.MIN_VALUE;
|
|
this.mLayoutFromEnd = false;
|
|
this.mValid = false;
|
|
}
|
|
|
|
AnchorInfo() {
|
|
reset();
|
|
}
|
|
|
|
void assignCoordinateFromPadding() {
|
|
int startAfterPadding;
|
|
if (this.mLayoutFromEnd) {
|
|
startAfterPadding = this.mOrientationHelper.getEndAfterPadding();
|
|
} else {
|
|
startAfterPadding = this.mOrientationHelper.getStartAfterPadding();
|
|
}
|
|
this.mCoordinate = startAfterPadding;
|
|
}
|
|
|
|
public String toString() {
|
|
return "AnchorInfo{mPosition=" + this.mPosition + ", mCoordinate=" + this.mCoordinate + ", mLayoutFromEnd=" + this.mLayoutFromEnd + ", mValid=" + this.mValid + '}';
|
|
}
|
|
|
|
boolean isViewValidAsAnchor(View view, RecyclerView.State state) {
|
|
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
|
|
return !layoutParams.isItemRemoved() && layoutParams.getViewLayoutPosition() >= 0 && layoutParams.getViewLayoutPosition() < state.getItemCount();
|
|
}
|
|
|
|
public void assignFromViewAndKeepVisibleRect(View view, int i) {
|
|
int totalSpaceChange = this.mOrientationHelper.getTotalSpaceChange();
|
|
if (totalSpaceChange >= 0) {
|
|
assignFromView(view, i);
|
|
return;
|
|
}
|
|
this.mPosition = i;
|
|
if (this.mLayoutFromEnd) {
|
|
int endAfterPadding = (this.mOrientationHelper.getEndAfterPadding() - totalSpaceChange) - this.mOrientationHelper.getDecoratedEnd(view);
|
|
this.mCoordinate = this.mOrientationHelper.getEndAfterPadding() - endAfterPadding;
|
|
if (endAfterPadding > 0) {
|
|
int decoratedMeasurement = this.mCoordinate - this.mOrientationHelper.getDecoratedMeasurement(view);
|
|
int startAfterPadding = this.mOrientationHelper.getStartAfterPadding();
|
|
int min = decoratedMeasurement - (startAfterPadding + Math.min(this.mOrientationHelper.getDecoratedStart(view) - startAfterPadding, 0));
|
|
if (min < 0) {
|
|
this.mCoordinate += Math.min(endAfterPadding, -min);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
int decoratedStart = this.mOrientationHelper.getDecoratedStart(view);
|
|
int startAfterPadding2 = decoratedStart - this.mOrientationHelper.getStartAfterPadding();
|
|
this.mCoordinate = decoratedStart;
|
|
if (startAfterPadding2 > 0) {
|
|
int endAfterPadding2 = (this.mOrientationHelper.getEndAfterPadding() - Math.min(0, (this.mOrientationHelper.getEndAfterPadding() - totalSpaceChange) - this.mOrientationHelper.getDecoratedEnd(view))) - (decoratedStart + this.mOrientationHelper.getDecoratedMeasurement(view));
|
|
if (endAfterPadding2 < 0) {
|
|
this.mCoordinate -= Math.min(startAfterPadding2, -endAfterPadding2);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void assignFromView(View view, int i) {
|
|
if (this.mLayoutFromEnd) {
|
|
this.mCoordinate = this.mOrientationHelper.getDecoratedEnd(view) + this.mOrientationHelper.getTotalSpaceChange();
|
|
} else {
|
|
this.mCoordinate = this.mOrientationHelper.getDecoratedStart(view);
|
|
}
|
|
this.mPosition = i;
|
|
}
|
|
}
|
|
|
|
protected static class LayoutChunkResult {
|
|
public int mConsumed;
|
|
public boolean mFinished;
|
|
public boolean mFocusable;
|
|
public boolean mIgnoreConsumed;
|
|
|
|
void resetInternal() {
|
|
this.mConsumed = 0;
|
|
this.mFinished = false;
|
|
this.mIgnoreConsumed = false;
|
|
this.mFocusable = false;
|
|
}
|
|
|
|
protected LayoutChunkResult() {
|
|
}
|
|
}
|
|
}
|