Add initial binding

9 files changed, 216 insertions, 2 deletions

diff --git a/build.gradle b/build.gradle
index bc5fadf..e9c7d86 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,9 @@
 import kau.ChangelogGenerator
 import kau.Plugins
 
-buildscript {
+buildscript { 
+    ext.kotlin_version = '1.3.41'
+
     repositories {
         google()
         jcenter()
@@ -17,7 +19,7 @@ buildscript {
         classpath Plugins.dexCount
         classpath Plugins.gitVersion
         classpath Plugins.spotless
-    }
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" }
 
     wrapper.setDistributionType(Wrapper.DistributionType.ALL)
 }
diff --git a/fastadapter-databinding/.gitignore b/fastadapter-databinding/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/fastadapter-databinding/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/fastadapter-databinding/build.gradle b/fastadapter-databinding/build.gradle
new file mode 100644
index 0000000..aefb22e
--- /dev/null
+++ b/fastadapter-databinding/build.gradle
@@ -0,0 +1,21 @@
+import kau.Dependencies
+import kau.Versions
+
+ext.kauSubModuleMinSdk = Versions.coreMinSdk
+
+apply from: '../android-lib.gradle'
+
+android {
+    dataBinding {
+        enabled = true
+    }
+}
+
+dependencies {
+    implementation project(':core')
+
+    api Dependencies.fastAdapter
+    api Dependencies.fastAdapter("utils")
+}
+
+apply from: '../artifacts.gradle'
diff --git a/fastadapter-databinding/consumer-rules.pro b/fastadapter-databinding/consumer-rules.pro
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/fastadapter-databinding/consumer-rules.pro
diff --git a/fastadapter-databinding/proguard-rules.pro b/fastadapter-databinding/proguard-rules.pro
new file mode 100644
index 0000000..f1b4245
--- /dev/null
+++ b/fastadapter-databinding/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
diff --git a/fastadapter-databinding/src/main/AndroidManifest.xml b/fastadapter-databinding/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..acd1012
--- /dev/null
+++ b/fastadapter-databinding/src/main/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="ca.allanwang.kau.fastadapter.databinding" />
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
diff --git a/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/FastBindingAdapter.kt b/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/FastBindingAdapter.kt
new file mode 100644
index 0000000..2270b5d
--- /dev/null
+++ b/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/FastBindingAdapter.kt
@@ -0,0 +1,45 @@
+package ca.allanwang.fastadapter.databinding
+
+import com.mikepenz.fastadapter.FastAdapter
+import com.mikepenz.fastadapter.IAdapter
+import com.mikepenz.fastadapter.IItemAdapter
+import com.mikepenz.fastadapter.adapters.ItemAdapter
+import com.mikepenz.fastadapter.diff.FastAdapterDiffUtil
+
+class FastBindingAdapter private constructor(private val adapter: ItemAdapter<GenericBindingItem>) :
+    FastAdapter<GenericBindingItem>(),
+    IItemAdapter<GenericBindingItem, GenericBindingItem> by adapter {
+
+    constructor() : this(ItemAdapter())
+
+    var lastClearTime: Long = -1
+
+    init {
+        super.addAdapter(0, adapter)
+    }
+
+    override fun clear(): FastBindingAdapter {
+        if (itemCount != 0) {
+            adapter.clear()
+            lastClearTime = System.currentTimeMillis()
+        }
+        return this
+    }
+
+    override fun <A : IAdapter<GenericBindingItem>> addAdapter(
+        index: Int,
+        adapter: A
+    ): FastAdapter<GenericBindingItem> {
+        throw IllegalArgumentException("FastBindingAdapter only allows one adapter")
+    }
+
+    fun setWithDiff(items: List<GenericBindingItem>, detectMoves: Boolean = true) {
+        FastAdapterDiffUtil.set(
+            adapter,
+            items,
+            null,
+            detectMoves
+        )
+    }
+
+}
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index 42d498e..0ec0606 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -4,6 +4,7 @@ include ':core',
         ':about',
         ':adapter',
         ':fastadapter',
+        ':fastadapter-databinding',
         ':colorpicker',
         ':mediapicker',
         ':kpref-activity',