1 files changed, 122 insertions, 0 deletions

diff --git a/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/BindingItem.kt b/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/BindingItem.kt
new file mode 100644
index 0000000..e52838b
--- /dev/null
+++ b/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/BindingItem.kt
@@ -0,0 +1,122 @@
+package ca.allanwang.fastadapter.databinding
+
+
+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.databinding.DataBindingUtil
+import androidx.databinding.ViewDataBinding
+import androidx.recyclerview.widget.RecyclerView
+import ca.allanwang.gitdroid.logger.L
+import ca.allanwang.gitdroid.views.BR
+import com.bumptech.glide.Glide
+import com.mikepenz.fastadapter.FastAdapter
+import com.mikepenz.fastadapter.items.AbstractItem
+import com.mikepenz.fastadapter.listeners.ClickEventHook
+
+typealias GenericBindingItem = BindingItem<*>
+
+abstract class BindingItem<Binding : ViewDataBinding>(open val data: Any?) : AbstractItem<BindingItem.ViewHolder>(),
+    BindingLayout<Binding> {
+
+    override val type: Int
+        get() = layoutRes
+
+    override fun createView(ctx: Context, parent: ViewGroup?): View {
+        val binding: ViewDataBinding = DataBindingUtil.inflate(
+            LayoutInflater.from(ctx),
+            layoutRes, parent,
+            false,
+            null
+        )
+        return binding.root
+    }
+
+    final override fun bindView(holder: ViewHolder, payloads: MutableList<Any>) {
+        super.bindView(holder, payloads)
+        val binding = DataBindingUtil.getBinding<Binding>(holder.itemView) ?: return
+        binding.bindView(holder, payloads)
+        binding.executePendingBindings()
+    }
+
+    open fun Binding.bindView(holder: ViewHolder, payloads: MutableList<Any>) {
+        setVariable(BR.model, data)
+    }
+
+    final override fun unbindView(holder: ViewHolder) {
+        super.unbindView(holder)
+        val binding = DataBindingUtil.getBinding<Binding>(holder.itemView) ?: return
+        binding.unbindView(holder)
+        binding.unbind()
+    }
+
+    open fun Binding.unbindView(holder: ViewHolder) {}
+
+    final override fun getViewHolder(v: View): ViewHolder = ViewHolder(v, layoutRes)
+
+    override fun failedToRecycle(holder: ViewHolder): Boolean {
+        L.e { "Failed to recycle" }
+        return super.failedToRecycle(holder)
+    }
+
+    companion object {
+        @JvmStatic
+        protected fun unbindGlide(vararg imageView: ImageView) {
+            if (imageView.isEmpty()) {
+                return
+            }
+            val manager = Glide.with(imageView.first().context)
+            imageView.forEach { manager.clear(it) }
+        }
+
+        @JvmStatic
+        protected fun unbind(vararg imageView: ImageView) {
+            imageView.forEach { it.setImageDrawable(null) }
+        }
+
+        @JvmStatic
+        protected fun unbind(vararg textView: TextView) {
+            textView.forEach { it.text = null }
+        }
+    }
+
+    class ViewHolder(itemView: View, internal val layoutRes: Int) : RecyclerView.ViewHolder(itemView)
+
+}
+
+interface BindingLayout<Binding : ViewDataBinding> {
+    val layoutRes: Int
+}
+
+
+abstract class BindingClickEventHook<Binding : ViewDataBinding, Item : BindingItem<Binding>>(val identifier: BindingLayout<Binding>) :
+    ClickEventHook<Item>() {
+
+    private fun RecyclerView.ViewHolder.binding(): Binding? {
+        val holder = this as? BindingItem.ViewHolder ?: return null
+        if (holder.layoutRes != identifier.layoutRes) {
+            return null
+        }
+        return DataBindingUtil.getBinding(itemView)
+    }
+
+    final override fun onBind(viewHolder: RecyclerView.ViewHolder): View? =
+        viewHolder.binding()?.onBind(viewHolder) ?: super.onBind(viewHolder)
+
+    open fun Binding.onBind(viewHolder: RecyclerView.ViewHolder): View? = super.onBind(viewHolder)
+
+    final override fun onBindMany(viewHolder: RecyclerView.ViewHolder): List<View>? =
+        viewHolder.binding()?.onBindMany(viewHolder) ?: super.onBindMany(viewHolder)
+
+    open fun Binding.onBindMany(viewHolder: RecyclerView.ViewHolder): List<View>? = super.onBindMany(viewHolder)
+
+    final override fun onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item) {
+        val binding: Binding = DataBindingUtil.findBinding(v) ?: return
+        binding.onClick(v, position, fastAdapter, item)
+    }
+
+    abstract fun Binding.onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item)
+}
\ No newline at end of file