From b8ca2b0c07a72149e531a55de0269fba8d5d28b6 Mon Sep 17 00:00:00 2001
From: Allan Wang <allanwang@google.com>
Date: Wed, 13 Nov 2019 14:28:03 -0800
Subject: Add unbind functions

---
 .../fastadapter/viewbinding/BindingItem.kt         | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

(limited to 'fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt')

diff --git a/fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt b/fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt
index a475615..543a9ef 100644
--- a/fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt
+++ b/fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt
@@ -19,6 +19,8 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewbinding.ViewBinding
 import ca.allanwang.kau.fastadapter.viewbinding.R
@@ -40,8 +42,8 @@ interface BindingLayout<Binding : ViewBinding> {
 }
 
 abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
-    AbstractItem<BindingItem.ViewHolder>(),
-    BindingLayout<Binding> {
+        AbstractItem<BindingItem.ViewHolder>(),
+        BindingLayout<Binding> {
 
     override val type: Int
         get() = layoutRes
@@ -62,6 +64,14 @@ abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
 
     abstract fun Binding.bindView(holder: ViewHolder, payloads: MutableList<Any>)
 
+    protected fun unbind(vararg textViews: TextView) {
+        textViews.forEach { it.text = null }
+    }
+
+    protected fun unbind(vararg imageViews: ImageView) {
+        imageViews.forEach { it.setImageDrawable(null) }
+    }
+
     final override fun unbindView(holder: ViewHolder) {
         super.unbindView(holder)
         val binding = holder.getBinding<Binding>()
@@ -71,7 +81,7 @@ abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
     open fun Binding.unbindView(holder: ViewHolder) {}
 
     final override fun getViewHolder(v: View): ViewHolder =
-        ViewHolder(v, layoutRes)
+            ViewHolder(v, layoutRes)
 
     override fun failedToRecycle(holder: ViewHolder): Boolean {
         KL.e { "Failed to recycle" }
@@ -87,7 +97,7 @@ abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
     override fun hashCode(): Int = data.hashCode()
 
     class ViewHolder(itemView: View, internal val layoutRes: Int) :
-        RecyclerView.ViewHolder(itemView) {
+            RecyclerView.ViewHolder(itemView) {
 
         /**
          * Retrieves a binding.
@@ -109,7 +119,7 @@ abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
 }
 
 abstract class BindingClickEventHook<Binding : ViewBinding, Item : BindingItem<Binding>>(val identifier: BindingLayout<Binding>) :
-    ClickEventHook<Item>() {
+        ClickEventHook<Item>() {
 
     private fun RecyclerView.ViewHolder.binding(): Binding? {
         val holder = this as? BindingItem.ViewHolder ?: return null
@@ -136,7 +146,7 @@ abstract class BindingClickEventHook<Binding : ViewBinding, Item : BindingItem<B
     }
 
     open fun Binding.onBindMany(viewHolder: RecyclerView.ViewHolder): List<View>? =
-        super.onBindMany(viewHolder)
+            super.onBindMany(viewHolder)
 
     final override fun onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item) {
         BindingItem.getBinding<Binding>(v).onClick(v, position, fastAdapter, item)
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