afollestad

import android.view.View
import android.view.View.OnAttachStateChangeListener
import androidx.lifecycle.LifecycleOwner

/** @author Aidan Follestad (@afollestad) */
class ViewLifecycleOwner(view: View) : LifecycleOwner, OnAttachStateChangeListener {

  private val lifecycle = SimpleLifecycle(this)

  init {

afollestad

import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import androidx.lifecycle.Lifecycle.Event.ON_DESTROY
import androidx.lifecycle.Lifecycle.Event.ON_START
import androidx.lifecycle.LifecycleObserver
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.OnLifecycleEvent
import android.content.BroadcastReceiver as StockReceiver

afollestad

import android.view.View
import android.view.View.GONE
import android.view.View.INVISIBLE
import android.view.View.VISIBLE
import android.view.ViewTreeObserver
import android.widget.AdapterView
import android.widget.Spinner

fun View.show() {
  visibility = VISIBLE

afollestad

/** @author Aidan Follestad (@afollestad) */
class TestLiveData<T>(data: LiveData<T>) {

  private val receivedValues = mutableListOf<T>()
  private val observer = Observer<T> { emission ->
    emission?.let { receivedValues.add(it) }
  }

  init {
    data.observeForever(observer)

afollestad

import androidx.lifecycle.LiveData
import androidx.lifecycle.MediatorLiveData
import androidx.lifecycle.Observer

/** @author Aidan Follestad (@afollestad) */
class DistinctLiveData<T>(source1: LiveData<T>) : MediatorLiveData<T>() {

  private var isInitialized = false
  private var lastValue: T? = null

afollestad

import androidx.lifecycle.LiveData
import androidx.lifecycle.MediatorLiveData
import androidx.lifecycle.Observer

typealias Zipper<T, K, R> = (T, K) -> R

/** @author Aidan Follestad (@afollestad) */
class ZipLiveData<T, K, R>(
  source1: LiveData<T>,
  source2: LiveData<K>,

afollestad

import android.view.View
import android.view.ViewTreeObserver

fun View.onLayout(cb: () -> Unit) {
  if (this.viewTreeObserver.isAlive) {
    this.viewTreeObserver.addOnGlobalLayoutListener(
        object : ViewTreeObserver.OnGlobalLayoutListener {
          override fun onGlobalLayout() {
            cb()
            this@onLayout.viewTreeObserver.removeOnGlobalLayoutListener(this)

afollestad

import kotlin.math.ceil

const val SECOND: Long = 1000
const val MINUTE = SECOND * 60
const val HOUR = MINUTE * 60
const val DAY = HOUR * 24
const val WEEK = DAY * 7
const val MONTH = WEEK * 4

fun Long.timeString() = when {

afollestad

import android.view.View
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Job
import kotlin.coroutines.CoroutineContext

fun View.scopeWhileAttached(
  context: CoroutineContext,
  exec: CoroutineScope.() -> Unit
) {
  val job = Job(context[Job])

afollestad

import android.content.ContentValues

/**
 * Returns a [ContentValues] instance which contains only values that have changed between
 * the receiver (original) and parameter (new) instances.
 */
fun ContentValues.diffFrom(contentValues: ContentValues): ContentValues {
  val diff = ContentValues()
  for ((name, oldValue) in this.valueSet()) {
    val newValue = contentValues.get(name)