Generify data binding to view binding

10 files changed, 165 insertions, 124 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
deleted file mode 100644
index b2b0f26..0000000
--- a/fastadapter-databinding/src/main/kotlin/ca/allanwang/fastadapter/databinding/BindingItem.kt
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * Copyright 2019 Allan Wang
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package ca.allanwang.fastadapter.databinding
-
-import android.content.Context
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import androidx.databinding.DataBindingUtil
-import androidx.databinding.ViewDataBinding
-import androidx.recyclerview.widget.RecyclerView
-import ca.allanwang.kau.logging.KL
-import com.mikepenz.fastadapter.FastAdapter
-import com.mikepenz.fastadapter.GenericItem
-import com.mikepenz.fastadapter.items.AbstractItem
-import com.mikepenz.fastadapter.listeners.ClickEventHook
-
-interface VhModel {
-    fun vh(): GenericItem
-}
-
-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
-        )
-        return binding.root
-    }
-
-    fun getBinding(holder: ViewHolder): Binding? =
-        DataBindingUtil.getBinding<Binding>(holder.itemView)
-
-    final override fun bindView(holder: ViewHolder, payloads: MutableList<Any>) {
-        super.bindView(holder, payloads)
-        val binding = getBinding(holder) ?: return
-        binding.bindView(holder, payloads)
-        binding.executePendingBindings()
-    }
-
-    abstract fun Binding.bindView(holder: ViewHolder, payloads: MutableList<Any>)
-
-    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 {
-        KL.e { "Failed to recycle" }
-        return super.failedToRecycle(holder)
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (other !is BindingItem<*>) return false
-        return identifier == other.identifier && data == other.data
-    }
-
-    override fun hashCode(): Int = data.hashCode()
-
-    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)
-}
diff --git a/fastadapter-databinding/.gitignore b/fastadapter-viewbinding/.gitignore
index 796b96d..796b96d 100644
--- a/fastadapter-databinding/.gitignore
+++ b/fastadapter-viewbinding/.gitignore
diff --git a/fastadapter-databinding/build.gradle b/fastadapter-viewbinding/build.gradle
index aefb22e..d9de6d5 100644
--- a/fastadapter-databinding/build.gradle
+++ b/fastadapter-viewbinding/build.gradle
@@ -9,6 +9,9 @@ android {
     dataBinding {
         enabled = true
     }
+    viewBinding {
+        enabled = true
+    }
 }
 
 dependencies {
diff --git a/fastadapter-databinding/consumer-rules.pro b/fastadapter-viewbinding/consumer-rules.pro
index e69de29..e69de29 100644
--- a/fastadapter-databinding/consumer-rules.pro
+++ b/fastadapter-viewbinding/consumer-rules.pro
diff --git a/fastadapter-databinding/proguard-rules.pro b/fastadapter-viewbinding/proguard-rules.pro
index f1b4245..f1b4245 100644
--- a/fastadapter-databinding/proguard-rules.pro
+++ b/fastadapter-viewbinding/proguard-rules.pro
diff --git a/fastadapter-databinding/src/main/AndroidManifest.xml b/fastadapter-viewbinding/src/main/AndroidManifest.xml
index acd1012..acd1012 100644
--- a/fastadapter-databinding/src/main/AndroidManifest.xml
+++ b/fastadapter-viewbinding/src/main/AndroidManifest.xml
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
new file mode 100644
index 0000000..2d1834f
--- /dev/null
+++ b/fastadapter-viewbinding/src/main/kotlin/ca/allanwang/fastadapter/viewbinding/BindingItem.kt
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2019 Allan Wang
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ca.allanwang.fastadapter.viewbinding
+
+import android.content.Context
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import androidx.viewbinding.ViewBinding
+import ca.allanwang.kau.fastadapter.databinding.R
+import ca.allanwang.kau.logging.KL
+import com.mikepenz.fastadapter.FastAdapter
+import com.mikepenz.fastadapter.GenericItem
+import com.mikepenz.fastadapter.items.AbstractItem
+import com.mikepenz.fastadapter.listeners.ClickEventHook
+
+interface VhModel {
+    fun vh(): GenericItem
+}
+
+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>(),
+    BindingLayout<Binding> {
+
+    override val type: Int
+        get() = layoutRes
+
+    override fun createView(ctx: Context, parent: ViewGroup?): View {
+        val binding = createBinding(ctx, parent)
+        BindingLayout.setBinding(binding.root, binding)
+        return binding.root
+    }
+
+    final override fun bindView(holder: BindingLayout.ViewHolder, payloads: MutableList<Any>) {
+        super.bindView(holder, payloads)
+        val binding = holder.getBinding<Binding>()
+        binding.bindView(holder, payloads)
+    }
+
+    final override fun unbindView(holder: BindingLayout.ViewHolder) {
+        super.unbindView(holder)
+        val binding = holder.getBinding<Binding>()
+        binding.unbindView(holder)
+    }
+
+    override fun Binding.unbindView(holder: BindingLayout.ViewHolder) {}
+
+    final override fun getViewHolder(v: View): BindingLayout.ViewHolder =
+        BindingLayout.ViewHolder(v, layoutRes)
+
+    override fun failedToRecycle(holder: BindingLayout.ViewHolder): Boolean {
+        KL.e { "Failed to recycle" }
+        return super.failedToRecycle(holder)
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is BindingItem<*>) return false
+        return identifier == other.identifier && data == other.data
+    }
+
+    override fun hashCode(): Int = data.hashCode()
+}
+
+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
+        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)
+        return view
+    }
+
+    open fun Binding.onBind(viewHolder: RecyclerView.ViewHolder): View? = super.onBind(viewHolder)
+
+    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) }
+        return views
+    }
+
+    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) {
+        v.findBinding().onClick(v, position, fastAdapter, item)
+    }
+
+    abstract fun Binding.onClick(v: View, position: Int, fastAdapter: FastAdapter<Item>, item: Item)
+}
diff --git a/fastadapter-viewbinding/src/main/res/values/ids.xml b/fastadapter-viewbinding/src/main/res/values/ids.xml
new file mode 100644
index 0000000..550ae02
--- /dev/null
+++ b/fastadapter-viewbinding/src/main/res/values/ids.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <item name="kau_view_binding_model" type="id" />
+    <item name="kau_view_binding_root" type="id" />
+</resources>
\ No newline at end of file
diff --git a/sample/src/main/kotlin/ca/allanwang/kau/sample/SwipeActivity.kt b/sample/src/main/kotlin/ca/allanwang/kau/sample/SwipeActivity.kt
index 5107e18..14b67e2 100644
--- a/sample/src/main/kotlin/ca/allanwang/kau/sample/SwipeActivity.kt
+++ b/sample/src/main/kotlin/ca/allanwang/kau/sample/SwipeActivity.kt
@@ -17,7 +17,9 @@ package ca.allanwang.kau.sample
 
 import android.app.Activity
 import android.os.Bundle
+import androidx.viewbinding.ViewBinding
 import ca.allanwang.kau.internal.KauBaseActivity
+import ca.allanwang.kau.sample.databinding.ActivitySwipeBinding
 import ca.allanwang.kau.swipe.SWIPE_EDGE_BOTTOM
 import ca.allanwang.kau.swipe.SWIPE_EDGE_LEFT
 import ca.allanwang.kau.swipe.SWIPE_EDGE_RIGHT
diff --git a/settings.gradle b/settings.gradle
index 0ec0606..43c5974 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -4,7 +4,7 @@ include ':core',
         ':about',
         ':adapter',
         ':fastadapter',
-        ':fastadapter-databinding',
+        ':fastadapter-viewbinding',
         ':colorpicker',
         ':mediapicker',
         ':kpref-activity',