1 /*
<lambda>null2  * Copyright (C) 2022 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 
17 package com.android.systemui.surfaceeffects.ripple
18 
19 import android.animation.Animator
20 import android.animation.AnimatorListenerAdapter
21 import android.animation.ValueAnimator
22 import androidx.annotation.VisibleForTesting
23 import androidx.core.graphics.ColorUtils
24 
25 /** A single ripple animation. */
26 class RippleAnimation(private val config: RippleAnimationConfig) {
27     @VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
28     val rippleShader: RippleShader = RippleShader(config.rippleShape)
29     private val animator: ValueAnimator = ValueAnimator.ofFloat(0f, 1f)
30 
31     init {
32         applyConfigToShader()
33     }
34 
35     /** Updates the ripple color during the animation. */
36     fun updateColor(color: Int) {
37         config.apply { config.color = color }
38         applyConfigToShader()
39     }
40 
41     @JvmOverloads
42     fun play(onAnimationEnd: Runnable? = null) {
43         if (isPlaying()) {
44             return // Ignore if ripple effect is already playing
45         }
46 
47         animator.duration = config.duration
48         animator.addUpdateListener { updateListener ->
49             val now = updateListener.currentPlayTime
50             val progress = updateListener.animatedValue as Float
51             rippleShader.rawProgress = progress
52             rippleShader.distortionStrength = if (config.shouldDistort) 1 - progress else 0f
53             rippleShader.time = now.toFloat()
54         }
55         animator.addListener(
56             object : AnimatorListenerAdapter() {
57                 override fun onAnimationEnd(animation: Animator) {
58                     onAnimationEnd?.run()
59                 }
60             }
61         )
62         animator.start()
63     }
64 
65     /** Indicates whether the animation is playing. */
66     fun isPlaying(): Boolean = animator.isRunning
67 
68     private fun applyConfigToShader() {
69         with(rippleShader) {
70             setCenter(config.centerX, config.centerY)
71             rippleSize.setMaxSize(config.maxWidth, config.maxHeight)
72             pixelDensity = config.pixelDensity
73             color = ColorUtils.setAlphaComponent(config.color, config.opacity)
74             sparkleStrength = config.sparkleStrength
75 
76             assignFadeParams(baseRingFadeParams, config.baseRingFadeParams)
77             assignFadeParams(sparkleRingFadeParams, config.sparkleRingFadeParams)
78             assignFadeParams(centerFillFadeParams, config.centerFillFadeParams)
79         }
80     }
81 
82     private fun assignFadeParams(
83         destFadeParams: RippleShader.FadeParams,
84         srcFadeParams: RippleShader.FadeParams?
85     ) {
86         srcFadeParams?.let {
87             destFadeParams.fadeInStart = it.fadeInStart
88             destFadeParams.fadeInEnd = it.fadeInEnd
89             destFadeParams.fadeOutStart = it.fadeOutStart
90             destFadeParams.fadeOutEnd = it.fadeOutEnd
91         }
92     }
93 }
94