SmashKs/OneShoot

/*
 * Copyright (C) 2018 The Smash Ks Open 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 smash.ks.com.oneshoot.widgets.reveal

import android.animation.Animator
import android.animation.AnimatorListenerAdapter
import android.animation.ArgbEvaluator
import android.animation.ValueAnimator
import android.os.Build.VERSION.SDK_INT
import android.os.Build.VERSION_CODES.LOLLIPOP
import android.os.Parcelable
import android.view.View
import android.view.ViewAnimationUtils
import androidx.interpolator.view.animation.FastOutSlowInInterpolator
import com.devrapid.kotlinknifer.gone
import com.devrapid.kotlinshaver.cast
import kotlinx.android.parcel.Parcelize
import kotlin.math.pow

private const val CIRCULAR_REVEAL_DURATION = 1000L

fun View.addCircularRevealAnimation(
    revealSettings: RevealAnimationSetting,
    startColor: Int,
    endColor: Int
) {
    if (SDK_INT >= LOLLIPOP) {
        addOnLayoutChangeListener(object : View.OnLayoutChangeListener {
            override fun onLayoutChange(
                v: View,
                left: Int,
                top: Int,
                right: Int,
                bottom: Int,
                oldLeft: Int,
                oldTop: Int,
                oldRight: Int,
                oldBottom: Int
            ) {
                v.removeOnLayoutChangeListener(this)
                val (cx, cy, width, height) = revealSettings

                // Simply use the diagonal of the view.
                val radius = Math.sqrt(width.toDouble().pow(2) + height.toDouble().pow(2)).toFloat()
                ViewAnimationUtils.createCircularReveal(v, cx, cy, 0f, radius).apply {
                    this.duration = CIRCULAR_REVEAL_DURATION
                    interpolator = FastOutSlowInInterpolator()
                }.start()
            }
        })
        startColorAnimation(startColor, endColor, CIRCULAR_REVEAL_DURATION)
    }
}

fun View.startCircularExitAnimation(
    revealSettings: RevealAnimationSetting,
    startColor: Int,
    endColor: Int,
    listener: () -> Unit
) = if (SDK_INT >= LOLLIPOP) {
    val (cx, cy, width, height) = revealSettings

    // Simply use the diagonal of the view.
    val radius = Math.sqrt(width.toDouble().pow(2) + height.toDouble().pow(2)).toFloat()
    ViewAnimationUtils.createCircularReveal(this, cx, cy, radius, 0f).apply {
        this.duration = CIRCULAR_REVEAL_DURATION
        interpolator = FastOutSlowInInterpolator()
        addListener(object : AnimatorListenerAdapter() {
            override fun onAnimationEnd(animation: Animator) {
                gone()
                listener()
            }
        })
    }.start()
    startColorAnimation(startColor, endColor, CIRCULAR_REVEAL_DURATION)
}
else {
    listener()
}

fun View.startColorAnimation(
    startColor: Int,
    endColor: Int,
    duration: Long
) = ValueAnimator().apply {
    this.duration = duration
    setIntValues(startColor, endColor)
    setEvaluator(ArgbEvaluator())
    addUpdateListener { setBackgroundColor(cast(it.animatedValue)) }
}.start()

/**
 * To keep the properties for the reveal animation settings.
 */
@Parcelize
data class RevealAnimationSetting(
    var centerX: Int = 0,
    var centerY: Int = 0,
    var width: Int = 0,
    var height: Int = 0
) : Parcelable