support for select and selectAll in ItemSelectionActions

oneadapter/src/main/java/com/idanatz/oneadapter/internal/InternalAdapter.kt

@@ -31,7 +31,7 @@ import java.lang.IllegalStateException
 
 private const val UPDATE_DATA_DELAY_MILLIS = 100L
 
-@Suppress("UNCHECKED_CAST", "NAME_SHADOWING")
+@Suppress("UNCHECKED_CAST")
 internal class InternalAdapter(val recyclerView: RecyclerView) : RecyclerView.Adapter<OneViewHolder<Diffable>>(),
         LoadMoreObserver, SelectionObserver, ItemSelectionActions {
 
@@ -44,7 +44,7 @@ internal class InternalAdapter(val recyclerView: RecyclerView) : RecyclerView.Ad
     private val context
         get() = recyclerView.context
 
-    private val viewHolderCreatorsStore = ViewHolderCreatorsStore()
+	private val viewHolderCreatorsStore = ViewHolderCreatorsStore()
     private val holderPositionHandler = HolderPositionHandler()
     private val logger = Logger(this)
 
@@ -137,7 +137,7 @@ internal class InternalAdapter(val recyclerView: RecyclerView) : RecyclerView.Ad
     override fun getItemId(position: Int): Long  {
         val item = data[position]
         // javaClass is used for lettings different Diffable models share the same unique identifier
-        return item.javaClass.name.hashCode() + item.uniqueIdentifier
+        return (item.javaClass.name.hashCode() + item.uniqueIdentifier)
     }
 
     override fun getItemViewType(position: Int) = viewHolderCreatorsStore.getCreatorUniqueIndex(data[position].javaClass)
@@ -317,7 +317,14 @@ internal class InternalAdapter(val recyclerView: RecyclerView) : RecyclerView.Ad
     fun enableSelection(itemSelectionModule: ItemSelectionModule) {
         itemSelectionModule.actions = this
         modules.itemSelectionModule = itemSelectionModule
-        oneSelectionHandler = OneSelectionHandler(itemSelectionModule, recyclerView).also { it.observer = this }
+        oneSelectionHandler = OneSelectionHandler(
+            selectionModule = itemSelectionModule,
+            recyclerView = recyclerView,
+            getItemModuleByItemId = { itemId ->
+                val model = data.find { getItemId(data.indexOf(it)) == itemId } ?: return@OneSelectionHandler null
+                modules.itemModules[model::class.java]
+             }
+        ).also { it.observer = this }
     }
 
     override fun onItemStateChanged(holder: OneViewHolder<Diffable>, position: Int, selected: Boolean) {
@@ -340,7 +347,15 @@ internal class InternalAdapter(val recyclerView: RecyclerView) : RecyclerView.Ad
         oneSelectionHandler?.startSelection()
     }
 
-    override fun clearSelection(): Boolean {
+	override fun select(position: Int): Boolean? {
+		return oneSelectionHandler?.select(position)
+	}
+
+	override fun selectAll(): Boolean? {
+		return oneSelectionHandler?.selectAll()
+	}
+
+	override fun clearSelection(): Boolean {
         return oneSelectionHandler?.clearSelection() ?: false
     }
 

oneadapter/src/main/java/com/idanatz/oneadapter/internal/selection/ItemSelectionActions.kt

@@ -5,6 +5,8 @@ import com.idanatz.oneadapter.external.interfaces.Diffable
 interface ItemSelectionActions {
 
     fun startSelection()
+	fun select(position: Int): Boolean?
+	fun selectAll(): Boolean?
     fun clearSelection(): Boolean?
 
     fun getSelectedItems(): List<Diffable>

oneadapter/src/main/java/com/idanatz/oneadapter/internal/selection/OneItemDetailLookup.kt

@@ -9,8 +9,7 @@ import com.idanatz.oneadapter.internal.utils.extensions.toOneViewHolder
 
 internal class OneItemDetailLookup(private val recyclerView: RecyclerView) : ItemDetailsLookup<Long>() {
 
-    @Nullable
-    override fun getItemDetails(@NotNull e: MotionEvent): ItemDetails<Long>? {
+    override fun getItemDetails(e: MotionEvent): ItemDetails<Long>? {
         return recyclerView.findChildViewUnder(e.x, e.y)?.let {
             val viewHolder = recyclerView.getChildViewHolder(it).toOneViewHolder()
             return viewHolder.createItemLookupInformation()

oneadapter/src/main/java/com/idanatz/oneadapter/internal/selection/OneSelectionHandler.kt

@@ -3,16 +3,17 @@ package com.idanatz.oneadapter.internal.selection
 import androidx.recyclerview.selection.SelectionTracker
 import androidx.recyclerview.selection.StorageStrategy
 import androidx.recyclerview.widget.RecyclerView
+import com.idanatz.oneadapter.external.modules.ItemModule
 import com.idanatz.oneadapter.external.modules.ItemSelectionModule
 import com.idanatz.oneadapter.external.modules.ItemSelectionModuleConfig
 import com.idanatz.oneadapter.external.states.SelectionStateConfig
 import com.idanatz.oneadapter.internal.utils.extensions.toOneViewHolder
 import java.util.*
 
-@Suppress("UNCHECKED_CAST")
 internal class OneSelectionHandler(
-		selectionModule: ItemSelectionModule,
-		val recyclerView: RecyclerView
+	selectionModule: ItemSelectionModule,
+	val recyclerView: RecyclerView,
+	val getItemModuleByItemId: (Long) -> ItemModule<*>?
 ) : SelectionTracker.SelectionObserver<Long>() {
 
 	private val ghostKey = UUID.randomUUID().mostSignificantBits
@@ -29,15 +30,13 @@ internal class OneSelectionHandler(
 	.withSelectionPredicate(object : SelectionTracker.SelectionPredicate<Long>() {
 		override fun canSetStateForKey(key: Long, nextState: Boolean): Boolean {
 			if (key == ghostKey)
-				return true // always accept let the ghost key
+				return true // always accept the ghost key
 
-			val forbidSelection = recyclerView.findViewHolderForItemId(key)?.toOneViewHolder()?.let { holder ->
-				holder.statesHooksMap?.getSelectionState()?.config?.let { selectionStateConfig ->
-					selectionStateConfig.selectionTrigger == SelectionStateConfig.SelectionTrigger.Manual && !isInManualSelection()
-				} ?: true
-			} ?: true
+			val itemModule = getItemModuleByItemId(key) ?: return false
 
-			return !forbidSelection
+			val isEnabled = itemModule.states.getSelectionState()?.config?.enabled ?: false
+			val forbidDueToManualSelection = itemModule.states.getSelectionState()?.config?.selectionTrigger == SelectionStateConfig.SelectionTrigger.Manual && !isInManualSelection()
+			return isEnabled && !forbidDueToManualSelection
 		}
 
 		override fun canSetStateAtPosition(position: Int, nextState: Boolean): Boolean = true
@@ -56,6 +55,24 @@ internal class OneSelectionHandler(
 		selectionTracker.select(ghostKey)
 	}
 
+	fun select(position: Int): Boolean {
+		val key = itemKeyProvider.getKey(position) ?: return false
+		return selectionTracker.select(key)
+	}
+
+	fun selectAll(): Boolean {
+		val itemCount = recyclerView.adapter?.itemCount ?: 0
+		val toBeSelectedKeys = arrayListOf<Long>()
+		for (i in 0 until itemCount) {
+			val key = itemKeyProvider.getKey(i)
+			if (key != null && !selectionTracker.isSelected(key)) {
+				toBeSelectedKeys.add(key)
+			}
+
+		}
+		return selectionTracker.setItemsSelected(toBeSelectedKeys, true)
+	}
+
 	fun clearSelection(): Boolean = selectionTracker.clearSelection()
 
 	fun getSelectedPositions(): List<Int> {

sample/app/src/main/java/com/idanatz/sample/examples/complete/CompleteExampleActivity.kt

@@ -28,6 +28,7 @@ import com.bumptech.glide.Glide
 import com.idanatz.oneadapter.external.event_hooks.SwipeEventHook
 import com.idanatz.oneadapter.external.modules.*
 import com.idanatz.oneadapter.external.modules.ItemSelectionModuleConfig.*
+import com.idanatz.oneadapter.external.states.SelectionStateConfig
 import com.idanatz.sample.examples.BaseExampleActivity
 import com.idanatz.sample.examples.ActionsDialog.*
 import com.idanatz.sample.models.StoriesModel
@@ -282,6 +283,10 @@ class CompleteExampleActivity : BaseExampleActivity() {
                 oneAdapter.modules.itemSelectionModule?.actions?.startSelection()
                 return true
             }
+	        R.id.action_select_all -> {
+		        oneAdapter.modules.itemSelectionModule?.actions?.selectAll()
+		        return true
+	        }
             else -> super.onOptionsItemSelected(item)
         }
     }

sample/app/src/main/java/com/idanatz/sample/examples/features/ItemSelectionModuleActivity.kt

@@ -119,6 +119,10 @@ class ItemSelectionModuleActivity : BaseExampleActivity() {
                 oneAdapter.modules.itemSelectionModule?.actions?.startSelection()
                 return true
             }
+	        R.id.action_select_all -> {
+		        oneAdapter.modules.itemSelectionModule?.actions?.selectAll()
+		        return true
+	        }
             else -> super.onOptionsItemSelected(item)
         }
     }

sample/app/src/main/res/drawable/baseline_checklist_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M22,7h-9v2h9V7zM22,15h-9v2h9V15zM5.54,11L2,7.46l1.41,-1.41l2.12,2.12l4.24,-4.24l1.41,1.41L5.54,11zM5.54,19L2,15.46l1.41,-1.41l2.12,2.12l4.24,-4.24l1.41,1.41L5.54,19z"/>
+</vector>

sample/app/src/main/res/menu/menu_main.xml

@@ -8,10 +8,18 @@
         android:id="@+id/action_start_selection"
         android:orderInCategory="300"
         android:title="Start Selection"
-        android:visible="false"
+        android:visible="true"
         android:icon="@drawable/ic_check_box_white_24dp"
         app:showAsAction="ifRoom"/>
 
+    <item
+        android:id="@+id/action_select_all"
+        android:orderInCategory="300"
+        android:title="Select All"
+        android:visible="true"
+        android:icon="@drawable/baseline_checklist_24"
+        app:showAsAction="ifRoom"/>
+
     <item
         android:id="@+id/action_delete"
         android:orderInCategory="300"