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Code Issues Pull Requests Actions Releases Activity

ADD week 5

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Rémi Heredero
2025-03-31 16:33:42 +02:00
parent 86f265f22d
commit bf645048e6
4927 changed files with 544053 additions and 0 deletions
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02-Easy5/E5/sources/androidx/recyclerview/widget/PagerSnapHelper.java Normal file
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package androidx.recyclerview.widget;
import android.graphics.PointF;
import android.util.DisplayMetrics;
import android.view.View;
import androidx.recyclerview.widget.RecyclerView;
/* loaded from: classes.dex */
public class PagerSnapHelper extends SnapHelper {
private static final int MAX_SCROLL_ON_FLING_DURATION = 100;
private OrientationHelper mHorizontalHelper;
private OrientationHelper mVerticalHelper;
@Override // androidx.recyclerview.widget.SnapHelper
public int[] calculateDistanceToFinalSnap(RecyclerView.LayoutManager layoutManager, View view) {
int[] iArr = new int[2];
if (layoutManager.canScrollHorizontally()) {
iArr[0] = distanceToCenter(layoutManager, view, getHorizontalHelper(layoutManager));
} else {
iArr[0] = 0;
}
if (layoutManager.canScrollVertically()) {
iArr[1] = distanceToCenter(layoutManager, view, getVerticalHelper(layoutManager));
} else {
iArr[1] = 0;
}
return iArr;
}
@Override // androidx.recyclerview.widget.SnapHelper
public View findSnapView(RecyclerView.LayoutManager layoutManager) {
if (layoutManager.canScrollVertically()) {
return findCenterView(layoutManager, getVerticalHelper(layoutManager));
}
if (layoutManager.canScrollHorizontally()) {
return findCenterView(layoutManager, getHorizontalHelper(layoutManager));
}
return null;
}
@Override // androidx.recyclerview.widget.SnapHelper
public int findTargetSnapPosition(RecyclerView.LayoutManager layoutManager, int i, int i2) {
OrientationHelper orientationHelper;
int itemCount = layoutManager.getItemCount();
if (itemCount == 0 || (orientationHelper = getOrientationHelper(layoutManager)) == null) {
return -1;
}
int childCount = layoutManager.getChildCount();
View view = null;
View view2 = null;
int i3 = Integer.MIN_VALUE;
int i4 = Integer.MAX_VALUE;
for (int i5 = 0; i5 < childCount; i5++) {
View childAt = layoutManager.getChildAt(i5);
if (childAt != null) {
int distanceToCenter = distanceToCenter(layoutManager, childAt, orientationHelper);
if (distanceToCenter <= 0 && distanceToCenter > i3) {
view2 = childAt;
i3 = distanceToCenter;
}
if (distanceToCenter >= 0 && distanceToCenter < i4) {
view = childAt;
i4 = distanceToCenter;
}
}
}
boolean isForwardFling = isForwardFling(layoutManager, i, i2);
if (isForwardFling && view != null) {
return layoutManager.getPosition(view);
}
if (!isForwardFling && view2 != null) {
return layoutManager.getPosition(view2);
}
if (isForwardFling) {
view = view2;
}
if (view == null) {
return -1;
}
int position = layoutManager.getPosition(view) + (isReverseLayout(layoutManager) == isForwardFling ? -1 : 1);
if (position < 0 || position >= itemCount) {
return -1;
}
return position;
}
private boolean isForwardFling(RecyclerView.LayoutManager layoutManager, int i, int i2) {
return layoutManager.canScrollHorizontally() ? i > 0 : i2 > 0;
}
/* JADX WARN: Multi-variable type inference failed */
private boolean isReverseLayout(RecyclerView.LayoutManager layoutManager) {
PointF computeScrollVectorForPosition;
int itemCount = layoutManager.getItemCount();
if (!(layoutManager instanceof RecyclerView.SmoothScroller.ScrollVectorProvider) || (computeScrollVectorForPosition = ((RecyclerView.SmoothScroller.ScrollVectorProvider) layoutManager).computeScrollVectorForPosition(itemCount - 1)) == null) {
return false;
}
return computeScrollVectorForPosition.x < 0.0f || computeScrollVectorForPosition.y < 0.0f;
}
@Override // androidx.recyclerview.widget.SnapHelper
protected LinearSmoothScroller createSnapScroller(RecyclerView.LayoutManager layoutManager) {
if (layoutManager instanceof RecyclerView.SmoothScroller.ScrollVectorProvider) {
return new LinearSmoothScroller(this.mRecyclerView.getContext()) { // from class: androidx.recyclerview.widget.PagerSnapHelper.1
@Override // androidx.recyclerview.widget.LinearSmoothScroller, androidx.recyclerview.widget.RecyclerView.SmoothScroller
protected void onTargetFound(View view, RecyclerView.State state, RecyclerView.SmoothScroller.Action action) {
PagerSnapHelper pagerSnapHelper = PagerSnapHelper.this;
int[] calculateDistanceToFinalSnap = pagerSnapHelper.calculateDistanceToFinalSnap(pagerSnapHelper.mRecyclerView.getLayoutManager(), view);
int i = calculateDistanceToFinalSnap[0];
int i2 = calculateDistanceToFinalSnap[1];
int calculateTimeForDeceleration = calculateTimeForDeceleration(Math.max(Math.abs(i), Math.abs(i2)));
if (calculateTimeForDeceleration > 0) {
action.update(i, i2, calculateTimeForDeceleration, this.mDecelerateInterpolator);
}
}
@Override // androidx.recyclerview.widget.LinearSmoothScroller
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return 100.0f / displayMetrics.densityDpi;
}
@Override // androidx.recyclerview.widget.LinearSmoothScroller
protected int calculateTimeForScrolling(int i) {
return Math.min(100, super.calculateTimeForScrolling(i));
}
};
}
return null;
}
private int distanceToCenter(RecyclerView.LayoutManager layoutManager, View view, OrientationHelper orientationHelper) {
return (orientationHelper.getDecoratedStart(view) + (orientationHelper.getDecoratedMeasurement(view) / 2)) - (orientationHelper.getStartAfterPadding() + (orientationHelper.getTotalSpace() / 2));
}
private View findCenterView(RecyclerView.LayoutManager layoutManager, OrientationHelper orientationHelper) {
int childCount = layoutManager.getChildCount();
View view = null;
if (childCount == 0) {
return null;
}
int startAfterPadding = orientationHelper.getStartAfterPadding() + (orientationHelper.getTotalSpace() / 2);
int i = Integer.MAX_VALUE;
for (int i2 = 0; i2 < childCount; i2++) {
View childAt = layoutManager.getChildAt(i2);
int abs = Math.abs((orientationHelper.getDecoratedStart(childAt) + (orientationHelper.getDecoratedMeasurement(childAt) / 2)) - startAfterPadding);
if (abs < i) {
view = childAt;
i = abs;
}
}
return view;
}
private OrientationHelper getOrientationHelper(RecyclerView.LayoutManager layoutManager) {
if (layoutManager.canScrollVertically()) {
return getVerticalHelper(layoutManager);
}
if (layoutManager.canScrollHorizontally()) {
return getHorizontalHelper(layoutManager);
}
return null;
}
private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
OrientationHelper orientationHelper = this.mVerticalHelper;
if (orientationHelper == null || orientationHelper.mLayoutManager != layoutManager) {
this.mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
}
return this.mVerticalHelper;
}
private OrientationHelper getHorizontalHelper(RecyclerView.LayoutManager layoutManager) {
OrientationHelper orientationHelper = this.mHorizontalHelper;
if (orientationHelper == null || orientationHelper.mLayoutManager != layoutManager) {
this.mHorizontalHelper = OrientationHelper.createHorizontalHelper(layoutManager);
}
return this.mHorizontalHelper;
}
}