Merge "Add prop to test various enrollment scaling" into sc-dev

import android.content.Context;

import android.graphics.PointF;

import android.hardware.fingerprint.IUdfpsOverlayController;

import android.os.Build;

import android.os.UserHandle;

import android.provider.Settings;

import android.util.TypedValue;

import java.util.ArrayList;

public class UdfpsEnrollHelper {

    private static final String TAG = "UdfpsEnrollHelper";

    private static final String SCALE_OVERRIDE =

            "com.android.systemui.biometrics.UdfpsEnrollHelper.scale";

    private static final float SCALE = 0.5f;

    // Enroll with two center touches before going to guided enrollment

    private static final int NUM_CENTER_TOUCHES = 2;

        void onEnrollmentProgress(int remaining, int totalSteps);

    }

    @NonNull private final Context mContext;

    // IUdfpsOverlayController reason

    private final int mEnrollReason;

    private final List<PointF> mGuidedEnrollmentPoints;

    @NonNull private final List<PointF> mGuidedEnrollmentPoints;

    private int mTotalSteps = -1;

    private int mRemainingSteps = -1;

    @Nullable Listener mListener;

    public UdfpsEnrollHelper(@NonNull Context context, int reason) {

        mContext = context;

        mEnrollReason = reason;

        mGuidedEnrollmentPoints = new ArrayList<>();

    @NonNull

    PointF getNextGuidedEnrollmentPoint() {

        float scale = SCALE;

        if (Build.IS_ENG || Build.IS_USERDEBUG) {

            scale = Settings.Secure.getFloatForUser(mContext.getContentResolver(),

                    SCALE_OVERRIDE, SCALE,

                    UserHandle.USER_CURRENT);

        }

        final int index = mLocationsEnrolled - NUM_CENTER_TOUCHES;

        final PointF originalPoint = mGuidedEnrollmentPoints

                .get(index % mGuidedEnrollmentPoints.size());

        return new PointF(originalPoint.x * 0.5f, originalPoint.y * 0.5f);

        return new PointF(originalPoint.x * scale, originalPoint.y * scale);

    }

}