1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.statusbar.notification;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.ValueAnimator;
22import android.graphics.ColorMatrix;
23import android.graphics.ColorMatrixColorFilter;
24import android.widget.ImageView;
25
26import com.android.systemui.Interpolators;
27import com.android.systemui.statusbar.phone.NotificationPanelView;
28
29import java.util.function.Consumer;
30
31public class NotificationDozeHelper {
32    private final ColorMatrix mGrayscaleColorMatrix = new ColorMatrix();
33
34    public void fadeGrayscale(final ImageView target, final boolean dark, long delay) {
35        startIntensityAnimation(new ValueAnimator.AnimatorUpdateListener() {
36            @Override
37            public void onAnimationUpdate(ValueAnimator animation) {
38                updateGrayscale(target, (float) animation.getAnimatedValue());
39            }
40        }, dark, delay, new AnimatorListenerAdapter() {
41            @Override
42            public void onAnimationEnd(Animator animation) {
43                if (!dark) {
44                    target.setColorFilter(null);
45                }
46            }
47        });
48    }
49
50    public void updateGrayscale(ImageView target, boolean dark) {
51        updateGrayscale(target, dark ? 1 : 0);
52    }
53
54    public void updateGrayscale(ImageView target, float darkAmount) {
55        if (darkAmount > 0) {
56            updateGrayscaleMatrix(darkAmount);
57            target.setColorFilter(new ColorMatrixColorFilter(mGrayscaleColorMatrix));
58        } else {
59            target.setColorFilter(null);
60        }
61    }
62
63    public void startIntensityAnimation(ValueAnimator.AnimatorUpdateListener updateListener,
64            boolean dark, long delay, Animator.AnimatorListener listener) {
65        float startIntensity = dark ? 0f : 1f;
66        float endIntensity = dark ? 1f : 0f;
67        ValueAnimator animator = ValueAnimator.ofFloat(startIntensity, endIntensity);
68        animator.addUpdateListener(updateListener);
69        animator.setDuration(NotificationPanelView.DOZE_ANIMATION_DURATION);
70        animator.setInterpolator(Interpolators.LINEAR_OUT_SLOW_IN);
71        animator.setStartDelay(delay);
72        if (listener != null) {
73            animator.addListener(listener);
74        }
75        animator.start();
76    }
77
78    public void setIntensityDark(Consumer<Float> listener, boolean dark,
79            boolean animate, long delay) {
80        if (animate) {
81            startIntensityAnimation(a -> listener.accept((Float) a.getAnimatedValue()), dark, delay,
82                    null /* listener */);
83        } else {
84            listener.accept(dark ? 1f : 0f);
85        }
86    }
87
88    public void updateGrayscaleMatrix(float intensity) {
89        mGrayscaleColorMatrix.setSaturation(1 - intensity);
90    }
91
92    public ColorMatrix getGrayscaleColorMatrix() {
93        return mGrayscaleColorMatrix;
94    }
95}
96