lifecycleProviderFromView

rxlifecycle/src/main/java/com/ekoapp/rxlifecycle/RxView.kt

@@ -2,13 +2,42 @@ package com.ekoapp.rxlifecycle
 
 import android.content.Context
 import android.util.AttributeSet
+import android.view.View
 import android.widget.LinearLayout
 import com.trello.rxlifecycle3.LifecycleProvider
 import com.trello.rxlifecycle3.LifecycleTransformer
 import com.trello.rxlifecycle3.RxLifecycle
 import io.reactivex.Observable
 import io.reactivex.subjects.BehaviorSubject
 
+fun View.lifecycleProviderFromView(): LifecycleProvider<ViewEvent> {
+    val subject = BehaviorSubject.create<ViewEvent>()
+
+    addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
+        override fun onViewAttachedToWindow(view: View?) {
+            subject.onNext(ViewEvent.ATTACH)
+        }
+
+        override fun onViewDetachedFromWindow(view: View) {
+            subject.onNext(ViewEvent.DETACH)
+        }
+    })
+
+    return object : LifecycleProvider<ViewEvent> {
+        override fun lifecycle(): Observable<ViewEvent> {
+            return subject.hide()
+        }
+
+        override fun <T : Any?> bindUntilEvent(event: ViewEvent): LifecycleTransformer<T> {
+            return RxLifecycle.bindUntilEvent<T, ViewEvent>(lifecycle(), event)
+        }
+
+        override fun <T : Any?> bindToLifecycle(): LifecycleTransformer<T> {
+            return bindUntilEvent(ViewEvent.DETACH)
+        }
+    }
+}
+
 abstract class RxView : LinearLayout, LifecycleProvider<ViewEvent> {
 
     constructor(context: Context?) : super(context)