diff options
Diffstat (limited to 'app/src/main/kotlin/com/pitchedapps/frost/utils/Kotterknife.kt')
| -rw-r--r-- | app/src/main/kotlin/com/pitchedapps/frost/utils/Kotterknife.kt | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/utils/Kotterknife.kt b/app/src/main/kotlin/com/pitchedapps/frost/utils/Kotterknife.kt new file mode 100644 index 00000000..6e3b5c24 --- /dev/null +++ b/app/src/main/kotlin/com/pitchedapps/frost/utils/Kotterknife.kt @@ -0,0 +1,137 @@ +package com.pitchedapps.frost.utils + +/** + * Created by Allan Wang on 2017-05-29. + * + * Courtesy of Jake Wharton + * + * https://github.com/JakeWharton/kotterknife/blob/master/src/main/kotlin/kotterknife/ButterKnife.kt + */ +import android.app.Activity +import android.app.Dialog +import android.app.DialogFragment +import android.app.Fragment +import android.support.v7.widget.RecyclerView.ViewHolder +import android.view.View +import kotlin.properties.ReadOnlyProperty +import kotlin.reflect.KProperty +import android.support.v4.app.DialogFragment as SupportDialogFragment +import android.support.v4.app.Fragment as SupportFragment + +public fun <V : View> View.bindView(id: Int) + : ReadOnlyProperty<View, V> = required(id, viewFinder) +public fun <V : View> Activity.bindView(id: Int) + : ReadOnlyProperty<Activity, V> = required(id, viewFinder) +public fun <V : View> Dialog.bindView(id: Int) + : ReadOnlyProperty<Dialog, V> = required(id, viewFinder) +public fun <V : View> DialogFragment.bindView(id: Int) + : ReadOnlyProperty<DialogFragment, V> = required(id, viewFinder) +public fun <V : View> SupportDialogFragment.bindView(id: Int) + : ReadOnlyProperty<SupportDialogFragment, V> = required(id, viewFinder) +public fun <V : View> Fragment.bindView(id: Int) + : ReadOnlyProperty<Fragment, V> = required(id, viewFinder) +public fun <V : View> SupportFragment.bindView(id: Int) + : ReadOnlyProperty<SupportFragment, V> = required(id, viewFinder) +public fun <V : View> ViewHolder.bindView(id: Int) + : ReadOnlyProperty<ViewHolder, V> = required(id, viewFinder) + +public fun <V : View> View.bindOptionalView(id: Int) + : ReadOnlyProperty<View, V?> = optional(id, viewFinder) +public fun <V : View> Activity.bindOptionalView(id: Int) + : ReadOnlyProperty<Activity, V?> = optional(id, viewFinder) +public fun <V : View> Dialog.bindOptionalView(id: Int) + : ReadOnlyProperty<Dialog, V?> = optional(id, viewFinder) +public fun <V : View> DialogFragment.bindOptionalView(id: Int) + : ReadOnlyProperty<DialogFragment, V?> = optional(id, viewFinder) +public fun <V : View> SupportDialogFragment.bindOptionalView(id: Int) + : ReadOnlyProperty<SupportDialogFragment, V?> = optional(id, viewFinder) +public fun <V : View> Fragment.bindOptionalView(id: Int) + : ReadOnlyProperty<Fragment, V?> = optional(id, viewFinder) +public fun <V : View> SupportFragment.bindOptionalView(id: Int) + : ReadOnlyProperty<SupportFragment, V?> = optional(id, viewFinder) +public fun <V : View> ViewHolder.bindOptionalView(id: Int) + : ReadOnlyProperty<ViewHolder, V?> = optional(id, viewFinder) + +public fun <V : View> View.bindViews(vararg ids: Int) + : ReadOnlyProperty<View, List<V>> = required(ids, viewFinder) +public fun <V : View> Activity.bindViews(vararg ids: Int) + : ReadOnlyProperty<Activity, List<V>> = required(ids, viewFinder) +public fun <V : View> Dialog.bindViews(vararg ids: Int) + : ReadOnlyProperty<Dialog, List<V>> = required(ids, viewFinder) +public fun <V : View> DialogFragment.bindViews(vararg ids: Int) + : ReadOnlyProperty<DialogFragment, List<V>> = required(ids, viewFinder) +public fun <V : View> SupportDialogFragment.bindViews(vararg ids: Int) + : ReadOnlyProperty<SupportDialogFragment, List<V>> = required(ids, viewFinder) +public fun <V : View> Fragment.bindViews(vararg ids: Int) + : ReadOnlyProperty<Fragment, List<V>> = required(ids, viewFinder) +public fun <V : View> SupportFragment.bindViews(vararg ids: Int) + : ReadOnlyProperty<SupportFragment, List<V>> = required(ids, viewFinder) +public fun <V : View> ViewHolder.bindViews(vararg ids: Int) + : ReadOnlyProperty<ViewHolder, List<V>> = required(ids, viewFinder) + +public fun <V : View> View.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<View, List<V>> = optional(ids, viewFinder) +public fun <V : View> Activity.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<Activity, List<V>> = optional(ids, viewFinder) +public fun <V : View> Dialog.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<Dialog, List<V>> = optional(ids, viewFinder) +public fun <V : View> DialogFragment.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<DialogFragment, List<V>> = optional(ids, viewFinder) +public fun <V : View> SupportDialogFragment.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<SupportDialogFragment, List<V>> = optional(ids, viewFinder) +public fun <V : View> Fragment.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<Fragment, List<V>> = optional(ids, viewFinder) +public fun <V : View> SupportFragment.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<SupportFragment, List<V>> = optional(ids, viewFinder) +public fun <V : View> ViewHolder.bindOptionalViews(vararg ids: Int) + : ReadOnlyProperty<ViewHolder, List<V>> = optional(ids, viewFinder) + +private val View.viewFinder: View.(Int) -> View? + get() = { findViewById(it) } +private val Activity.viewFinder: Activity.(Int) -> View? + get() = { findViewById(it) } +private val Dialog.viewFinder: Dialog.(Int) -> View? + get() = { findViewById(it) } +private val DialogFragment.viewFinder: DialogFragment.(Int) -> View? + get() = { dialog.findViewById(it) } +private val SupportDialogFragment.viewFinder: SupportDialogFragment.(Int) -> View? + get() = { dialog.findViewById(it) } +private val Fragment.viewFinder: Fragment.(Int) -> View? + get() = { view.findViewById(it) } +private val SupportFragment.viewFinder: SupportFragment.(Int) -> View? + get() = { view!!.findViewById(it) } +private val ViewHolder.viewFinder: ViewHolder.(Int) -> View? + get() = { itemView.findViewById(it) } + +private fun viewNotFound(id:Int, desc: KProperty<*>): Nothing = + throw IllegalStateException("View ID $id for '${desc.name}' not found.") + +@Suppress("UNCHECKED_CAST") +private fun <T, V : View> required(id: Int, finder: T.(Int) -> View?) + = Lazy { t: T, desc -> t.finder(id) as V? ?: viewNotFound(id, desc) } + +@Suppress("UNCHECKED_CAST") +private fun <T, V : View> optional(id: Int, finder: T.(Int) -> View?) + = Lazy { t: T, desc -> t.finder(id) as V? } + +@Suppress("UNCHECKED_CAST") +private fun <T, V : View> required(ids: IntArray, finder: T.(Int) -> View?) + = Lazy { t: T, desc -> ids.map { t.finder(it) as V? ?: viewNotFound(it, desc) } } + +@Suppress("UNCHECKED_CAST") +private fun <T, V : View> optional(ids: IntArray, finder: T.(Int) -> View?) + = Lazy { t: T, desc -> ids.map { t.finder(it) as V? }.filterNotNull() } + +// Like Kotlin's lazy delegate but the initializer gets the target and metadata passed to it +private class Lazy<T, V>(private val initializer: (T, KProperty<*>) -> V) : ReadOnlyProperty<T, V> { + private object EMPTY + private var value: Any? = EMPTY + + override fun getValue(thisRef: T, property: KProperty<*>): V { + if (value == EMPTY) { + value = initializer(thisRef, property) + } + @Suppress("UNCHECKED_CAST") + return value as V + } +}
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