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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.biometrics;
import android.annotation.NonNull;
import android.annotation.Nullable;
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.Log;
import android.util.TypedValue;
import android.view.accessibility.AccessibilityManager;
import java.util.ArrayList;
import java.util.List;
/**
* Helps keep track of enrollment state and animates the progress bar accordingly.
*/
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;
private static final String NEW_COORDS_OVERRIDE =
"com.android.systemui.biometrics.UdfpsNewCoords";
// Enroll with two center touches before going to guided enrollment
private static final int NUM_CENTER_TOUCHES = 2;
interface Listener {
void onEnrollmentProgress(int remaining, int totalSteps);
void onLastStepAcquired();
}
@NonNull private final Context mContext;
// IUdfpsOverlayController reason
private final int mEnrollReason;
private final boolean mAccessibilityEnabled;
@NonNull private final List<PointF> mGuidedEnrollmentPoints;
private int mTotalSteps = -1;
private int mRemainingSteps = -1;
// Note that this is actually not equal to "mTotalSteps - mRemainingSteps", because the
// interface makes no promises about monotonically increasing by one each time.
private int mLocationsEnrolled = 0;
@Nullable Listener mListener;
public UdfpsEnrollHelper(@NonNull Context context, int reason) {
mContext = context;
mEnrollReason = reason;
final AccessibilityManager am = context.getSystemService(AccessibilityManager.class);
mAccessibilityEnabled = am.isEnabled();
mGuidedEnrollmentPoints = new ArrayList<>();
// Number of pixels per mm
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_MM, 1,
context.getResources().getDisplayMetrics());
boolean useNewCoords = Settings.Secure.getIntForUser(mContext.getContentResolver(),
NEW_COORDS_OVERRIDE, 0,
UserHandle.USER_CURRENT) != 0;
if (useNewCoords && (Build.IS_ENG || Build.IS_USERDEBUG)) {
Log.v(TAG, "Using new coordinates");
mGuidedEnrollmentPoints.add(new PointF(-0.15f * px, -1.02f * px));
mGuidedEnrollmentPoints.add(new PointF(-0.15f * px, 1.02f * px));
mGuidedEnrollmentPoints.add(new PointF( 0.29f * px, 0.00f * px));
mGuidedEnrollmentPoints.add(new PointF( 2.17f * px, -2.35f * px));
mGuidedEnrollmentPoints.add(new PointF( 1.07f * px, -3.96f * px));
mGuidedEnrollmentPoints.add(new PointF(-0.37f * px, -4.31f * px));
mGuidedEnrollmentPoints.add(new PointF(-1.69f * px, -3.29f * px));
mGuidedEnrollmentPoints.add(new PointF(-2.48f * px, -1.23f * px));
mGuidedEnrollmentPoints.add(new PointF(-2.48f * px, 1.23f * px));
mGuidedEnrollmentPoints.add(new PointF(-1.69f * px, 3.29f * px));
mGuidedEnrollmentPoints.add(new PointF(-0.37f * px, 4.31f * px));
mGuidedEnrollmentPoints.add(new PointF( 1.07f * px, 3.96f * px));
mGuidedEnrollmentPoints.add(new PointF( 2.17f * px, 2.35f * px));
mGuidedEnrollmentPoints.add(new PointF( 2.58f * px, 0.00f * px));
} else {
Log.v(TAG, "Using old coordinates");
mGuidedEnrollmentPoints.add(new PointF( 2.00f * px, 0.00f * px));
mGuidedEnrollmentPoints.add(new PointF( 0.87f * px, -2.70f * px));
mGuidedEnrollmentPoints.add(new PointF(-1.80f * px, -1.31f * px));
mGuidedEnrollmentPoints.add(new PointF(-1.80f * px, 1.31f * px));
mGuidedEnrollmentPoints.add(new PointF( 0.88f * px, 2.70f * px));
mGuidedEnrollmentPoints.add(new PointF( 3.94f * px, -1.06f * px));
mGuidedEnrollmentPoints.add(new PointF( 2.90f * px, -4.14f * px));
mGuidedEnrollmentPoints.add(new PointF(-0.52f * px, -5.95f * px));
mGuidedEnrollmentPoints.add(new PointF(-3.33f * px, -3.33f * px));
mGuidedEnrollmentPoints.add(new PointF(-3.99f * px, -0.35f * px));
mGuidedEnrollmentPoints.add(new PointF(-3.62f * px, 2.54f * px));
mGuidedEnrollmentPoints.add(new PointF(-1.49f * px, 5.57f * px));
mGuidedEnrollmentPoints.add(new PointF( 2.29f * px, 4.92f * px));
mGuidedEnrollmentPoints.add(new PointF( 3.82f * px, 1.78f * px));
}
}
boolean shouldShowProgressBar() {
return mEnrollReason == IUdfpsOverlayController.REASON_ENROLL_ENROLLING;
}
void onEnrollmentProgress(int remaining) {
if (mTotalSteps == -1) {
mTotalSteps = remaining;
}
if (remaining != mRemainingSteps) {
mLocationsEnrolled++;
}
mRemainingSteps = remaining;
if (mListener != null) {
mListener.onEnrollmentProgress(remaining, mTotalSteps);
}
}
void onEnrollmentHelp() {
}
void setListener(Listener listener) {
mListener = listener;
// Only notify during setListener if enrollment is already in progress, so the progress
// bar can be updated. If enrollment has not started yet, the progress bar will be empty
// anyway.
if (mListener != null && mTotalSteps != -1) {
mListener.onEnrollmentProgress(mRemainingSteps, mTotalSteps);
}
}
boolean isCenterEnrollmentComplete() {
if (mTotalSteps == -1 || mRemainingSteps == -1) {
return false;
} else if (mAccessibilityEnabled) {
return false;
}
final int stepsEnrolled = mTotalSteps - mRemainingSteps;
return stepsEnrolled >= NUM_CENTER_TOUCHES;
}
@NonNull
PointF getNextGuidedEnrollmentPoint() {
if (mAccessibilityEnabled) {
return new PointF(0f, 0f);
}
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 * scale, originalPoint.y * scale);
}
void animateIfLastStep() {
if (mListener == null) {
Log.e(TAG, "animateIfLastStep, null listener");
return;
}
if (mRemainingSteps <= 2 && mRemainingSteps >= 0) {
mListener.onLastStepAcquired();
}
}
}
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