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-rw-r--r--fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt91
1 files changed, 41 insertions, 50 deletions
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 d1ae65f..d40be3d 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
@@ -31,65 +31,48 @@ interface VhModel {
fun vh(): GenericItem
}
+/**
+ * Layout container. Should be implemented in a [BindingItem] companion.
+ */
interface BindingLayout<Binding : ViewBinding> {
val layoutRes: Int
- fun createBinding(context: Context, parent: ViewGroup?): Binding
- fun Binding.bindView(holder: ViewHolder, payloads: MutableList<Any>)
- fun Binding.unbindView(holder: ViewHolder)
-
- class ViewHolder(itemView: View, internal val layoutRes: Int) :
- RecyclerView.ViewHolder(itemView) {
-
- /**
- * Retrieves a binding.
- *
- * It is assumed that the binding is set on view holder creation,
- * and that its type matches the supplied generic.
- */
- fun <T> getBinding(): T = getBinding(itemView)
- }
-
- companion object {
- fun setBinding(view: View, binding: Any) {
- view.setTag(R.id.kau_view_binding_model, binding)
- }
-
- @Suppress("UNCHECKED_CAST")
- fun <T> getBinding(view: View): T = view.getTag(R.id.kau_view_binding_model) as T
- }
}
abstract class BindingItem<Binding : ViewBinding>(open val data: Any?) :
- AbstractItem<BindingLayout.ViewHolder>(),
+ AbstractItem<BindingItem.ViewHolder>(),
BindingLayout<Binding> {
override val type: Int
get() = layoutRes
+ abstract fun createBinding(context: Context, parent: ViewGroup?): Binding
+
override fun createView(ctx: Context, parent: ViewGroup?): View {
val binding = createBinding(ctx, parent)
- BindingLayout.setBinding(binding.root, binding)
+ setBinding(binding.root, binding)
return binding.root
}
- final override fun bindView(holder: BindingLayout.ViewHolder, payloads: MutableList<Any>) {
+ final override fun bindView(holder: ViewHolder, payloads: MutableList<Any>) {
super.bindView(holder, payloads)
val binding = holder.getBinding<Binding>()
binding.bindView(holder, payloads)
}
- final override fun unbindView(holder: BindingLayout.ViewHolder) {
+ abstract fun Binding.bindView(holder: ViewHolder, payloads: MutableList<Any>)
+
+ final override fun unbindView(holder: ViewHolder) {
super.unbindView(holder)
val binding = holder.getBinding<Binding>()
binding.unbindView(holder)
}
- override fun Binding.unbindView(holder: BindingLayout.ViewHolder) {}
+ open fun Binding.unbindView(holder: ViewHolder) {}
- final override fun getViewHolder(v: View): BindingLayout.ViewHolder =
- BindingLayout.ViewHolder(v, layoutRes)
+ final override fun getViewHolder(v: View): ViewHolder =
+ ViewHolder(v, layoutRes)
- override fun failedToRecycle(holder: BindingLayout.ViewHolder): Boolean {
+ override fun failedToRecycle(holder: ViewHolder): Boolean {
KL.e { "Failed to recycle" }
return super.failedToRecycle(holder)
}
@@ -101,36 +84,44 @@ 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) {
+
+ /**
+ * Retrieves a binding.
+ *
+ * It is assumed that the binding is set prior to this call,
+ * and that its type matches the supplied generic.
+ */
+ fun <T> getBinding(): T = getBinding(itemView)
+ }
+
+ companion object {
+ fun setBinding(view: View, binding: Any) {
+ view.setTag(R.id.kau_view_binding_model, binding)
+ }
+
+ @Suppress("UNCHECKED_CAST")
+ fun <T> getBinding(view: View): T = view.getTag(R.id.kau_view_binding_model) as T
+ }
}
abstract class BindingClickEventHook<Binding : ViewBinding, Item : BindingItem<Binding>>(val identifier: BindingLayout<Binding>) :
ClickEventHook<Item>() {
private fun RecyclerView.ViewHolder.binding(): Binding? {
- val holder = this as? BindingLayout.ViewHolder ?: return null
+ val holder = this as? BindingItem.ViewHolder ?: return null
if (holder.layoutRes != identifier.layoutRes) {
return null
}
return getBinding()
}
- /**
- * All bound views must set the view root, which will be used to find the binding.
- * We avoid attaching the binding directly
- */
- private fun View.setRoot(root: View) {
- setTag(R.id.kau_view_binding_root, root)
- }
-
- private fun View.findBinding(): Binding {
- val root = getTag(R.id.kau_view_binding_root) as View
- return BindingLayout.getBinding(root)
- }
-
final override fun onBind(viewHolder: RecyclerView.ViewHolder): View? {
val binding = viewHolder.binding() ?: return super.onBind(viewHolder)
val view = binding.onBind(viewHolder) ?: return super.onBind(viewHolder)
- view.setRoot(binding.root)
+ BindingItem.setBinding(view, binding)
return view
}
@@ -139,7 +130,7 @@ abstract class BindingClickEventHook<Binding : ViewBinding, Item : BindingItem<B
final override fun onBindMany(viewHolder: RecyclerView.ViewHolder): List<View>? {
val binding = viewHolder.binding() ?: return super.onBindMany(viewHolder)
val views = binding.onBindMany(viewHolder) ?: return super.onBindMany(viewHolder)
- views.forEach { it.setRoot(binding.root) }
+ views.forEach { BindingItem.setBinding(it, binding) }
return views
}
@@ -147,8 +138,8 @@ abstract class BindingClickEventHook<Binding : ViewBinding, Item : BindingItem<B
super.onBindMany(viewHolder)
final override fun onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item) {
- v.findBinding().onClick(v, position, fastAdapter, item)
+ BindingItem.getBinding<Binding>(v).onClick(v, position, fastAdapter, item)
}
abstract fun Binding.onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item)
-}
+} \ No newline at end of file