afollestad

import android.view.View
import java.lang.System.currentTimeMillis

private const val HALF_SECOND = 500L

/** @author Aidan Follestad (@afollestad) */
abstract class DebouncedOnClickListener(
  private val delayBetweenClicks: Long = HALF_SECOND
) : View.OnClickListener {

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)

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 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 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

/** @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

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addon-google_apis-google-19

afollestad

/** @author Aidan Follestad (afollestad) */
class LifecycleAwareDisposable(
  private val disposable: Disposable
) : LifecycleObserver {

  @OnLifecycleEvent(ON_DESTROY)
  fun dispose() = disposable.dispose()
}

/** @author Aidan Follestad (afollestad) */

afollestad

import androidx.lifecycle.LiveData
import androidx.lifecycle.Transformations

fun <X, Y> LiveData<X>.map(mapper: (X) -> Y) =
  Transformations.map(this, mapper)!!

fun <X, Y> LiveData<X>.switchMap(mapper: (X) -> LiveData<Y>) =
  Transformations.switchMap(this, mapper)!!

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 {