Added DelegationListAdapter, small refactor of delegates
This commit is contained in:
Denis Karmyshakov
parent
e3e978b7f7
commit
69f1c9af4a
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@ -24,6 +24,8 @@ import android.support.v4.view.ViewCompat;
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import android.support.v7.widget.RecyclerView;
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import android.view.ViewGroup;
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import java.util.List;
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/**
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* Objects of such class controls creation and binding of specific type of RecyclerView's ViewHolders.
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* Default {@link #getItemViewType} is generating on construction of object.
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@ -43,6 +45,28 @@ public abstract class AdapterDelegate<TViewHolder extends RecyclerView.ViewHolde
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return defaultItemViewType;
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}
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/**
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* Returns if object is processable by this delegate.
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*
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* @param items Items to check;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection;
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* @return True if item is processable by this delegate.
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*/
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public abstract boolean isForViewType(@NonNull final List<Object> items, final int adapterPosition, final int collectionPosition);
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/**
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* Returns unique ID of item to support stable ID's logic of RecyclerView's adapter.
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*
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* @param items Items in adapter;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection;
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* @return Unique item ID.
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*/
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public long getItemId(@NonNull final List<Object> items, final int adapterPosition, final int collectionPosition) {
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return 0;
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}
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/**
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* Creates ViewHolder to bind item to it later.
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*
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@ -52,4 +76,21 @@ public abstract class AdapterDelegate<TViewHolder extends RecyclerView.ViewHolde
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@NonNull
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public abstract TViewHolder onCreateViewHolder(@NonNull final ViewGroup parent);
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/**
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* Binds item to created by this object ViewHolder.
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*
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* @param holder ViewHolder to bind item to;
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* @param items Items in adapter;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection that contains item;
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* @param payloads Payloads;
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*/
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public abstract void onBindViewHolder(
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@NonNull final RecyclerView.ViewHolder holder,
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@NonNull final List<Object> items,
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final int adapterPosition,
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final int collectionPosition,
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@NonNull final List<Object> payloads
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);
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}
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@ -0,0 +1,60 @@
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package ru.touchin.roboswag.components.adapters
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import android.support.v7.widget.RecyclerView
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import android.util.SparseArray
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import android.view.ViewGroup
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/**
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* Manager for delegation callbacks from [RecyclerView.Adapter] to delegates.
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*/
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class DelegatesManager {
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private val delegates = SparseArray<AdapterDelegate<*>>()
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fun getItemViewType(items: List<*>, adapterPosition: Int, collectionPosition: Int): Int {
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for (index in 0 until delegates.size()) {
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val delegate = delegates.valueAt(index)
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if (delegate.isForViewType(items, adapterPosition, collectionPosition)) {
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return delegate.itemViewType
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}
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}
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throw IllegalStateException("Delegate not found")
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}
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fun getItemId(items: List<*>, adapterPosition: Int, collectionPosition: Int): Long {
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val delegate = getDelegate(getItemViewType(items, adapterPosition, collectionPosition))
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return delegate.getItemId(items, adapterPosition, collectionPosition)
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}
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fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder = getDelegate(viewType).onCreateViewHolder(parent)
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fun onBindViewHolder(holder: RecyclerView.ViewHolder, items: List<*>, adapterPosition: Int, collectionPosition: Int, payloads: List<Any>) {
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val delegate = getDelegate(getItemViewType(items, adapterPosition, collectionPosition))
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delegate.onBindViewHolder(holder, items, adapterPosition, collectionPosition, payloads)
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}
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/**
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* Adds [ItemAdapterDelegate] to adapter.
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*
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* @param delegate Delegate to add.
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*/
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fun addDelegate(delegate: ItemAdapterDelegate<*, *>) = delegates.put(delegate.itemViewType, delegate)
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/**
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* Adds [PositionAdapterDelegate] to adapter.
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*
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* @param delegate Delegate to add.
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*/
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fun addDelegate(delegate: PositionAdapterDelegate<*>) = delegates.put(delegate.itemViewType, delegate)
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/**
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* Removes [AdapterDelegate] from adapter.
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*
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* @param delegate Delegate to remove.
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*/
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fun removeDelegate(delegate: AdapterDelegate<*>) = delegates.remove(delegate.itemViewType)
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private fun getDelegate(viewType: Int): AdapterDelegate<*> =
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delegates[viewType] ?: throw IllegalStateException("No AdapterDelegate added for view type: $viewType")
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}
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@ -0,0 +1,82 @@
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package ru.touchin.roboswag.components.adapters
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import android.support.v7.recyclerview.extensions.AsyncDifferConfig
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import android.support.v7.recyclerview.extensions.AsyncListDiffer
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import android.support.v7.util.DiffUtil
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import android.support.v7.widget.RecyclerView
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import android.view.ViewGroup
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/**
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* Base adapter with delegation and diff computing on background thread.
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*/
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open class DelegationListAdapter<TItem>(diffCallback: DiffUtil.ItemCallback<TItem>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
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var itemClickListener: ((TItem, RecyclerView.ViewHolder) -> Unit)? = null
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private val delegatesManager = DelegatesManager()
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private var differ = AsyncListDiffer(OffsetAdapterUpdateCallback(this, ::getHeadersCount), AsyncDifferConfig.Builder<TItem>(diffCallback).build())
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open fun getHeadersCount(): Int = 0
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open fun getFootersCount(): Int = 0
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override fun getItemCount(): Int = getHeadersCount() + differ.currentList.size + getFootersCount()
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override fun getItemViewType(position: Int): Int = delegatesManager.getItemViewType(getList(), position, getCollectionPosition(position))
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override fun getItemId(position: Int): Long = delegatesManager.getItemId(getList(), position, getCollectionPosition(position))
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder = delegatesManager.onCreateViewHolder(parent, viewType)
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override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int, payloads: List<Any>) {
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val collectionPosition = getCollectionPosition(position)
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if (itemClickListener != null && collectionPosition in 0 until getList().size) {
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holder.itemView.setOnClickListener { itemClickListener?.invoke(getList()[collectionPosition], holder) }
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} else {
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holder.itemView.setOnClickListener(null)
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}
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delegatesManager.onBindViewHolder(holder, getList(), position, collectionPosition, payloads)
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}
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final override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) = Unit
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/**
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* Adds [ItemAdapterDelegate] to adapter.
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*
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* @param delegate Delegate to add.
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*/
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fun addDelegate(delegate: ItemAdapterDelegate<*, *>) = delegatesManager.addDelegate(delegate)
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/**
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* Adds [PositionAdapterDelegate] to adapter.
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*
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* @param delegate Delegate to add.
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*/
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fun addDelegate(delegate: PositionAdapterDelegate<*>) = delegatesManager.addDelegate(delegate)
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/**
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* Submits a new list to be diffed, and displayed.
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*
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* If a list is already being displayed, a diff will be computed on a background thread, which
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* will dispatch Adapter.notifyItem events on the main thread.
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*
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* @param list The new list to be displayed.
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*/
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fun submitList(list: List<TItem>) = differ.submitList(list)
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/**
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* Get the current List - any diffing to present this list has already been computed and
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* dispatched via the ListUpdateCallback.
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* <p>
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* If a <code>null</code> List, or no List has been submitted, an empty list will be returned.
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* <p>
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* The returned list may not be mutated - mutations to content must be done through
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* {@link #submitList(List)}.
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*
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* @return current List.
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*/
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fun getList(): List<TItem> = differ.currentList
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fun getCollectionPosition(adapterPosition: Int): Int = adapterPosition - getHeadersCount()
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}
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@ -2,7 +2,6 @@ package ru.touchin.roboswag.components.adapters;
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import android.support.annotation.NonNull;
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import android.support.v7.widget.RecyclerView;
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import android.view.ViewGroup;
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import java.util.List;
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@ -14,72 +13,73 @@ import java.util.List;
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* @param <TViewHolder> Type of {@link RecyclerView.ViewHolder} of delegate;
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* @param <TItem> Type of items to bind to {@link RecyclerView.ViewHolder}s.
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*/
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@SuppressWarnings("unchecked")
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public abstract class ItemAdapterDelegate<TViewHolder extends RecyclerView.ViewHolder, TItem> extends AdapterDelegate<TViewHolder> {
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@Override
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public boolean isForViewType(@NonNull final List<Object> items, final int adapterPosition, final int collectionPosition) {
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return collectionPosition >= 0
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&& collectionPosition < items.size()
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&& isForViewType(items.get(collectionPosition), adapterPosition, collectionPosition);
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}
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/**
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* Returns if object is processable by this delegate.
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* This item will be casted to {@link TItem} and passes to {@link #onBindViewHolder(TViewHolder, TItem, int, int)}.
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* This item will be casted to {@link TItem} and passes to {@link #onBindViewHolder(TViewHolder, TItem, int, int, List)}.
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*
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* @param item Item to check;
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* @param positionInAdapter Position of item in adapter;
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* @param itemCollectionPosition Position of item in collection that contains item;
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* @param item Item to check;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection that contains item;
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* @return True if item is processable by this delegate.
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*/
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public abstract boolean isForViewType(@NonNull final Object item, final int positionInAdapter, final int itemCollectionPosition);
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public boolean isForViewType(@NonNull final Object item, final int adapterPosition, final int collectionPosition) {
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return true;
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}
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@Override
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public long getItemId(@NonNull final List<Object> items, final int adapterPosition, final int collectionPosition) {
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return getItemId((TItem) items.get(collectionPosition), adapterPosition, collectionPosition);
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}
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/**
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* Returns unique ID of item to support stable ID's logic of RecyclerView's adapter.
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*
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* @param item Item to check;
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* @param positionInAdapter Position of item in adapter;
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* @param positionInCollection Position of item in collection that contains item;
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* @param item Item in adapter;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection that contains item;
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* @return Unique item ID.
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*/
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public long getItemId(@NonNull final TItem item, final int positionInAdapter, final int positionInCollection) {
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public long getItemId(@NonNull final TItem item, final int adapterPosition, final int collectionPosition) {
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return 0;
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}
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/**
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* Creates ViewHolder to bind item to it later.
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*
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* @param parent Container of ViewHolder's view.
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* @return New ViewHolder.
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*/
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@NonNull
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public abstract TViewHolder onCreateViewHolder(@NonNull final ViewGroup parent);
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/**
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* Binds item to created by this object ViewHolder.
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*
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* @param holder ViewHolder to bind item to;
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* @param item Item to check;
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* @param positionInAdapter Position of item in adapter;
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* @param positionInCollection Position of item in collection that contains item;
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*/
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public abstract void onBindViewHolder(
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@NonNull final TViewHolder holder,
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@NonNull final TItem item,
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final int positionInAdapter,
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final int positionInCollection
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);
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@Override
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public void onBindViewHolder(
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@NonNull final RecyclerView.ViewHolder holder,
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@NonNull final List<Object> items,
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final int adapterPosition,
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final int collectionPosition,
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@NonNull final List<Object> payloads
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) {
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//noinspection unchecked
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onBindViewHolder((TViewHolder) holder, (TItem) items.get(collectionPosition), adapterPosition, collectionPosition, payloads);
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}
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/**
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* Binds item with payloads to created by this object ViewHolder.
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*
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* @param holder ViewHolder to bind item to;
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* @param item Item to check;
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* @param item Item in adapter;
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* @param adapterPosition Position of item in adapter;
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* @param collectionPosition Position of item in collection that contains item;
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* @param payloads Payloads;
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* @param positionInAdapter Position of item in adapter;
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* @param positionInCollection Position of item in collection that contains item;
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*/
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public void onBindViewHolder(
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public abstract void onBindViewHolder(
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@NonNull final TViewHolder holder,
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@NonNull final TItem item,
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@NonNull final List<Object> payloads,
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final int positionInAdapter,
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final int positionInCollection
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) {
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//do nothing by default
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}
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final int adapterPosition,
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final int collectionPosition,
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@NonNull final List<Object> payloads
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);
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}
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@ -0,0 +1,24 @@
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package ru.touchin.roboswag.components.adapters
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import android.support.v7.util.ListUpdateCallback
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import android.support.v7.widget.RecyclerView
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class OffsetAdapterUpdateCallback(private val adapter: RecyclerView.Adapter<*>, private val offsetProvider: () -> Int) : ListUpdateCallback {
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override fun onInserted(position: Int, count: Int) {
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adapter.notifyItemInserted(position + offsetProvider())
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}
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override fun onRemoved(position: Int, count: Int) {
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adapter.notifyItemRangeRemoved(position + offsetProvider(), count)
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}
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override fun onMoved(fromPosition: Int, toPosition: Int) {
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adapter.notifyItemMoved(fromPosition + offsetProvider(), toPosition + offsetProvider())
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}
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override fun onChanged(position: Int, count: Int, payload: Any?) {
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adapter.notifyItemRangeChanged(position + offsetProvider(), count, payload)
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}
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}
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@ -2,7 +2,6 @@ package ru.touchin.roboswag.components.adapters;
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import android.support.annotation.NonNull;
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import android.support.v7.widget.RecyclerView;
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import android.view.ViewGroup;
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import java.util.List;
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@ -15,49 +14,54 @@ import java.util.List;
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*/
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public abstract class PositionAdapterDelegate<TViewHolder extends RecyclerView.ViewHolder> extends AdapterDelegate<TViewHolder> {
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@Override
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public boolean isForViewType(@NonNull final List<Object> items, final int adapterPosition, final int collectionPosition) {
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return isForViewType(adapterPosition);
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}
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/**
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* Returns if object is processable by this delegate.
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*
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* @param positionInAdapter Position of item in adapter;
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* @param adapterPosition Position of item in adapter;
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* @return True if item is processable by this delegate.
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*/
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public abstract boolean isForViewType(final int positionInAdapter);
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public abstract boolean isForViewType(final int adapterPosition);
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@Override
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public long getItemId(@NonNull final List<Object> objects, final int adapterPosition, final int itemsOffset) {
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return getItemId(adapterPosition);
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}
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/**
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* Returns unique ID of item to support stable ID's logic of RecyclerView's adapter.
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*
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* @param positionInAdapter Position of item in adapter;
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* @param adapterPosition Position of item in adapter;
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* @return Unique item ID.
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*/
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public long getItemId(final int positionInAdapter) {
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public long getItemId(final int adapterPosition) {
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return 0;
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}
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/**
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* Creates ViewHolder to bind position to it later.
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*
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* @param parent Container of ViewHolder's view.
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* @return New ViewHolder.
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*/
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@NonNull
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public abstract TViewHolder onCreateViewHolder(@NonNull final ViewGroup parent);
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/**
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* Binds position to ViewHolder.
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*
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* @param holder ViewHolder to bind position to;
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* @param positionInAdapter Position of item in adapter.
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*/
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public abstract void onBindViewHolder(@NonNull final TViewHolder holder, final int positionInAdapter);
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@Override
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public void onBindViewHolder(
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@NonNull final RecyclerView.ViewHolder holder,
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@NonNull final List<Object> items,
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final int adapterPosition,
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final int collectionPosition,
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@NonNull final List<Object> payloads
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) {
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//noinspection unchecked
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onBindViewHolder((TViewHolder) holder, adapterPosition, payloads);
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}
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/**
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* Binds position with payloads to ViewHolder.
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*
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* @param holder ViewHolder to bind position to;
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* @param payloads Payloads;
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* @param positionInAdapter Position of item in adapter.
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* @param adapterPosition Position of item in adapter;
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* @param payloads Payloads.
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*/
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public void onBindViewHolder(@NonNull final TViewHolder holder, @NonNull final List<Object> payloads, final int positionInAdapter) {
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public void onBindViewHolder(@NonNull final TViewHolder holder, final int adapterPosition, @NonNull final List<Object> payloads) {
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//do nothing by default
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}
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@ -1,105 +0,0 @@
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/*
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* Copyright (c) 2015 RoboSwag (Gavriil Sitnikov, Vsevolod Ivanov)
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*
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* This file is part of RoboSwag library.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package ru.touchin.roboswag.components.utils;
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import android.content.Context;
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import android.content.res.AssetManager;
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import android.content.res.TypedArray;
|
||||
import android.graphics.Typeface;
|
||||
import android.support.annotation.NonNull;
|
||||
import android.support.annotation.StyleableRes;
|
||||
import android.util.AttributeSet;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.util.Arrays;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
|
||||
import ru.touchin.roboswag.core.log.Lc;
|
||||
import ru.touchin.roboswag.core.utils.ShouldNotHappenException;
|
||||
|
||||
/**
|
||||
* Created by Gavriil Sitnikov on 18/07/2014.
|
||||
* Manager for typefaces stored in 'assets/fonts' folder.
|
||||
*/
|
||||
public final class Typefaces {
|
||||
|
||||
private static final Map<String, Typeface> TYPEFACES_MAP = new HashMap<>();
|
||||
|
||||
/**
|
||||
* Returns {@link Typeface} by name from assets 'fonts' folder.
|
||||
*
|
||||
* @param context Context of assets where typeface file stored in;
|
||||
* @param name Full name of typeface (without extension, e.g. 'Roboto-Regular');
|
||||
* @return {@link Typeface} from assets.
|
||||
*/
|
||||
@NonNull
|
||||
public static Typeface getByName(@NonNull final Context context, @NonNull final String name) {
|
||||
synchronized (TYPEFACES_MAP) {
|
||||
Typeface result = TYPEFACES_MAP.get(name);
|
||||
if (result == null) {
|
||||
final AssetManager assetManager = context.getAssets();
|
||||
result = Typeface.DEFAULT;
|
||||
try {
|
||||
final List<String> fonts = Arrays.asList(assetManager.list("fonts"));
|
||||
if (fonts.contains(name + ".ttf")) {
|
||||
result = Typeface.createFromAsset(assetManager, "fonts/" + name + ".ttf");
|
||||
} else if (fonts.contains(name + ".otf")) {
|
||||
result = Typeface.createFromAsset(assetManager, "fonts/" + name + ".otf");
|
||||
} else {
|
||||
Lc.assertion("Can't find .otf or .ttf file in assets folder 'fonts' with name: " + name);
|
||||
}
|
||||
} catch (final IOException exception) {
|
||||
Lc.assertion(new ShouldNotHappenException("Can't get font " + name + '.'
|
||||
+ "Did you forget to create assets folder named 'fonts'?", exception));
|
||||
}
|
||||
TYPEFACES_MAP.put(name, result);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns {@link Typeface} by name from assets 'fonts' folder.
|
||||
*
|
||||
* @param context Context of assets where typeface file stored in;
|
||||
* @param attrs Attributes of view to get font from;
|
||||
* @param styleableId Id of attribute set;
|
||||
* @param attributeId Id of attribute;
|
||||
* @return {@link Typeface} from assets.
|
||||
*/
|
||||
@NonNull
|
||||
public static Typeface getFromAttributes(@NonNull final Context context, @NonNull final AttributeSet attrs,
|
||||
@NonNull @StyleableRes final int[] styleableId, @StyleableRes final int attributeId) {
|
||||
final TypedArray typedArray = context.obtainStyledAttributes(attrs, styleableId);
|
||||
final String customTypeface = typedArray.getString(attributeId);
|
||||
typedArray.recycle();
|
||||
if (customTypeface != null) {
|
||||
return getByName(context, customTypeface);
|
||||
}
|
||||
Lc.w("Couldn't find custom typeface. Returns default");
|
||||
return Typeface.DEFAULT;
|
||||
}
|
||||
|
||||
private Typefaces() {
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue