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package androidx.recyclerview.widget;
import android.content.Context;
import android.graphics.PointF;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.LinearInterpolator;
import androidx.recyclerview.widget.RecyclerView;
public class LinearSmoothScroller extends RecyclerView.SmoothScroller {
private static final boolean DEBUG = false;
private static final float MILLISECONDS_PER_INCH = 25.0f;
public static final int SNAP_TO_ANY = 0;
public static final int SNAP_TO_END = 1;
public static final int SNAP_TO_START = -1;
private static final float TARGET_SEEK_EXTRA_SCROLL_RATIO = 1.2f;
private static final int TARGET_SEEK_SCROLL_DISTANCE_PX = 10000;
protected final DecelerateInterpolator mDecelerateInterpolator = new DecelerateInterpolator();
private final DisplayMetrics mDisplayMetrics;
private boolean mHasCalculatedMillisPerPixel = false;
protected int mInterimTargetDx = 0;
protected int mInterimTargetDy = 0;
protected final LinearInterpolator mLinearInterpolator = new LinearInterpolator();
private float mMillisPerPixel;
protected PointF mTargetVector;
private int clampApplyScroll(int i, int i2) {
int i3 = i - i2;
if (i * i3 <= 0) {
return 0;
}
return i3;
}
/* access modifiers changed from: protected */
public void onStart() {
}
public LinearSmoothScroller(Context context) {
this.mDisplayMetrics = context.getResources().getDisplayMetrics();
}
/* access modifiers changed from: protected */
public void onTargetFound(View view, RecyclerView.State state, RecyclerView.SmoothScroller.Action action) {
int calculateDxToMakeVisible = calculateDxToMakeVisible(view, getHorizontalSnapPreference());
int calculateDyToMakeVisible = calculateDyToMakeVisible(view, getVerticalSnapPreference());
int calculateTimeForDeceleration = calculateTimeForDeceleration((int) Math.sqrt((double) ((calculateDxToMakeVisible * calculateDxToMakeVisible) + (calculateDyToMakeVisible * calculateDyToMakeVisible))));
if (calculateTimeForDeceleration > 0) {
action.update(-calculateDxToMakeVisible, -calculateDyToMakeVisible, calculateTimeForDeceleration, this.mDecelerateInterpolator);
}
}
/* access modifiers changed from: protected */
public void onSeekTargetStep(int i, int i2, RecyclerView.State state, RecyclerView.SmoothScroller.Action action) {
if (getChildCount() == 0) {
stop();
return;
}
this.mInterimTargetDx = clampApplyScroll(this.mInterimTargetDx, i);
int clampApplyScroll = clampApplyScroll(this.mInterimTargetDy, i2);
this.mInterimTargetDy = clampApplyScroll;
if (this.mInterimTargetDx == 0 && clampApplyScroll == 0) {
updateActionForInterimTarget(action);
}
}
/* access modifiers changed from: protected */
public void onStop() {
this.mInterimTargetDy = 0;
this.mInterimTargetDx = 0;
this.mTargetVector = null;
}
/* access modifiers changed from: protected */
public float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return MILLISECONDS_PER_INCH / ((float) displayMetrics.densityDpi);
}
private float getSpeedPerPixel() {
if (!this.mHasCalculatedMillisPerPixel) {
this.mMillisPerPixel = calculateSpeedPerPixel(this.mDisplayMetrics);
this.mHasCalculatedMillisPerPixel = true;
}
return this.mMillisPerPixel;
}
/* access modifiers changed from: protected */
public int calculateTimeForDeceleration(int i) {
return (int) Math.ceil(((double) calculateTimeForScrolling(i)) / 0.3356d);
}
/* access modifiers changed from: protected */
public int calculateTimeForScrolling(int i) {
return (int) Math.ceil((double) (((float) Math.abs(i)) * getSpeedPerPixel()));
}
/* access modifiers changed from: protected */
public int getHorizontalSnapPreference() {
PointF pointF = this.mTargetVector;
if (pointF == null || pointF.x == 0.0f) {
return 0;
}
return this.mTargetVector.x > 0.0f ? 1 : -1;
}
/* access modifiers changed from: protected */
public int getVerticalSnapPreference() {
PointF pointF = this.mTargetVector;
if (pointF == null || pointF.y == 0.0f) {
return 0;
}
return this.mTargetVector.y > 0.0f ? 1 : -1;
}
/* access modifiers changed from: protected */
public void updateActionForInterimTarget(RecyclerView.SmoothScroller.Action action) {
PointF computeScrollVectorForPosition = computeScrollVectorForPosition(getTargetPosition());
if (computeScrollVectorForPosition == null || (computeScrollVectorForPosition.x == 0.0f && computeScrollVectorForPosition.y == 0.0f)) {
action.jumpTo(getTargetPosition());
stop();
return;
}
normalize(computeScrollVectorForPosition);
this.mTargetVector = computeScrollVectorForPosition;
this.mInterimTargetDx = (int) (computeScrollVectorForPosition.x * 10000.0f);
this.mInterimTargetDy = (int) (computeScrollVectorForPosition.y * 10000.0f);
action.update((int) (((float) this.mInterimTargetDx) * TARGET_SEEK_EXTRA_SCROLL_RATIO), (int) (((float) this.mInterimTargetDy) * TARGET_SEEK_EXTRA_SCROLL_RATIO), (int) (((float) calculateTimeForScrolling(10000)) * TARGET_SEEK_EXTRA_SCROLL_RATIO), this.mLinearInterpolator);
}
public int calculateDtToFit(int i, int i2, int i3, int i4, int i5) {
if (i5 == -1) {
return i3 - i;
}
if (i5 == 0) {
int i6 = i3 - i;
if (i6 > 0) {
return i6;
}
int i7 = i4 - i2;
if (i7 < 0) {
return i7;
}
return 0;
} else if (i5 == 1) {
return i4 - i2;
} else {
throw new IllegalArgumentException("snap preference should be one of the constants defined in SmoothScroller, starting with SNAP_");
}
}
public int calculateDyToMakeVisible(View view, int i) {
RecyclerView.LayoutManager layoutManager = getLayoutManager();
if (layoutManager == null || !layoutManager.canScrollVertically()) {
return 0;
}
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
return calculateDtToFit(layoutManager.getDecoratedTop(view) - layoutParams.topMargin, layoutManager.getDecoratedBottom(view) + layoutParams.bottomMargin, layoutManager.getPaddingTop(), layoutManager.getHeight() - layoutManager.getPaddingBottom(), i);
}
public int calculateDxToMakeVisible(View view, int i) {
RecyclerView.LayoutManager layoutManager = getLayoutManager();
if (layoutManager == null || !layoutManager.canScrollHorizontally()) {
return 0;
}
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
return calculateDtToFit(layoutManager.getDecoratedLeft(view) - layoutParams.leftMargin, layoutManager.getDecoratedRight(view) + layoutParams.rightMargin, layoutManager.getPaddingLeft(), layoutManager.getWidth() - layoutManager.getPaddingRight(), i);
}
}
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