Migrate favourite categories to AdapterDelegates

app/src/main/java/org/koitharu/kotatsu/details/ui/adapter/ChaptersSelectionDecoration.kt

@@ -21,7 +21,7 @@ class ChaptersSelectionDecoration(context: Context) : RecyclerView.ItemDecoratio
 	private val paint = Paint(Paint.ANTI_ALIAS_FLAG)
 
 	init {
-		paint.color = context.getThemeColor(android.R.attr.colorControlActivated)
+		paint.color = context.getThemeColor(com.google.android.material.R.attr.colorSurface)
 		paint.style = Paint.Style.FILL
 	}
 

app/src/main/java/org/koitharu/kotatsu/favourites/data/FavouriteCategoriesDao.kt

@@ -1,6 +1,8 @@
 package org.koitharu.kotatsu.favourites.data
 
 import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+import org.koitharu.kotatsu.core.model.FavouriteCategory
 
 @Dao
 abstract class FavouriteCategoriesDao {
@@ -8,6 +10,9 @@ abstract class FavouriteCategoriesDao {
 	@Query("SELECT * FROM favourite_categories ORDER BY sort_key")
 	abstract suspend fun findAll(): List<FavouriteCategoryEntity>
 
+	@Query("SELECT * FROM favourite_categories ORDER BY sort_key")
+	abstract fun observeAll(): Flow<List<FavouriteCategoryEntity>>
+
 	@Insert(onConflict = OnConflictStrategy.ABORT)
 	abstract suspend fun insert(category: FavouriteCategoryEntity): Long
 

app/src/main/java/org/koitharu/kotatsu/favourites/domain/FavouritesRepository.kt

@@ -58,6 +58,12 @@ class FavouritesRepository(private val db: MangaDatabase) {
 		return entities?.map { it.toFavouriteCategory() }.orEmpty()
 	}
 
+	fun observeCategories(): Flow<List<FavouriteCategory>> {
+		return db.favouriteCategoriesDao.observeAll().mapItems {
+			it.toFavouriteCategory()
+		}
+	}
+
 	fun observeCategories(mangaId: Long): Flow<List<FavouriteCategory>> {
 		return db.favouritesDao.observe(mangaId).map { entity ->
 			entity?.categories?.map { it.toFavouriteCategory() }.orEmpty()

app/src/main/java/org/koitharu/kotatsu/favourites/domain/OnFavouritesChangeListener.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.favourites.domain
 
+@Deprecated("Use flow")
 fun interface OnFavouritesChangeListener {
 
 	fun onFavouritesChanged(mangaId: Long)

app/src/main/java/org/koitharu/kotatsu/favourites/ui/FavouritesContainerFragment.kt

@@ -12,8 +12,6 @@ import org.koin.android.viewmodel.ext.android.viewModel
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseFragment
 import org.koitharu.kotatsu.core.model.FavouriteCategory
-import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
-import org.koitharu.kotatsu.favourites.domain.OnFavouritesChangeListener
 import org.koitharu.kotatsu.favourites.ui.categories.CategoriesActivity
 import org.koitharu.kotatsu.favourites.ui.categories.CategoriesEditDelegate
 import org.koitharu.kotatsu.favourites.ui.categories.FavouritesCategoriesViewModel
@@ -22,8 +20,7 @@ import java.util.*
 import kotlin.collections.ArrayList
 
 class FavouritesContainerFragment : BaseFragment(R.layout.fragment_favourites),
-	OnFavouritesChangeListener, FavouritesTabLongClickListener,
-	CategoriesEditDelegate.CategoriesEditCallback {
+	FavouritesTabLongClickListener,	CategoriesEditDelegate.CategoriesEditCallback {
 
 	private val viewModel by viewModel<FavouritesCategoriesViewModel>()
 
@@ -41,18 +38,12 @@ class FavouritesContainerFragment : BaseFragment(R.layout.fragment_favourites),
 		val adapter = FavouritesPagerAdapter(this, this)
 		pager.adapter = adapter
 		TabLayoutMediator(tabs, pager, adapter).attach()
-		FavouritesRepository.subscribe(this)
 
 		viewModel.categories.observe(viewLifecycleOwner, ::onCategoriesChanged)
 		viewModel.onError.observe(viewLifecycleOwner, ::onError)
 	}
 
-	override fun onDestroyView() {
-		FavouritesRepository.unsubscribe(this)
-		super.onDestroyView()
-	}
-
-	fun onCategoriesChanged(categories: List<FavouriteCategory>) {
+	private fun onCategoriesChanged(categories: List<FavouriteCategory>) {
 		val data = ArrayList<FavouriteCategory>(categories.size + 1)
 		data += FavouriteCategory(0L, getString(R.string.all_favourites), -1, Date())
 		data += categories
@@ -75,19 +66,13 @@ class FavouritesContainerFragment : BaseFragment(R.layout.fragment_favourites),
 	}
 
 	override fun getTitle(): CharSequence? {
-		return getString(R.string.favourites)
+		return context?.getString(R.string.favourites)
 	}
 
 	private fun onError(e: Throwable) {
 		Snackbar.make(pager, e.message ?: return, Snackbar.LENGTH_LONG).show()
 	}
 
-	override fun onFavouritesChanged(mangaId: Long) = Unit
-
-	override fun onCategoriesChanged() {
-		viewModel.loadAllCategories()
-	}
-
 	override fun onTabLongClick(tabView: View, category: FavouriteCategory): Boolean {
 		val menuRes = if (category.id == 0L) R.menu.popup_category_empty else R.menu.popup_category
 		tabView.showPopupMenu(menuRes) {

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/CategoriesActivity.kt

@@ -15,12 +15,12 @@ import kotlinx.android.synthetic.main.activity_categories.*
 import org.koin.android.viewmodel.ext.android.viewModel
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseActivity
-import org.koitharu.kotatsu.base.ui.list.OnRecyclerItemClickListener
+import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.utils.ext.getDisplayMessage
 import org.koitharu.kotatsu.utils.ext.showPopupMenu
 
-class CategoriesActivity : BaseActivity(), OnRecyclerItemClickListener<FavouriteCategory>,
+class CategoriesActivity : BaseActivity(), OnListItemClickListener<FavouriteCategory>,
 	View.OnClickListener, CategoriesEditDelegate.CategoriesEditCallback {
 
 	private val viewModel by viewModel<FavouritesCategoriesViewModel>()
@@ -52,7 +52,7 @@ class CategoriesActivity : BaseActivity(), OnRecyclerItemClickListener<Favourite
 		}
 	}
 
-	override fun onItemClick(item: FavouriteCategory, position: Int, view: View) {
+	override fun onItemClick(item: FavouriteCategory, view: View) {
 		view.showPopupMenu(R.menu.popup_category) {
 			when (it.itemId) {
 				R.id.action_remove -> editDelegate.deleteCategory(item)
@@ -62,15 +62,15 @@ class CategoriesActivity : BaseActivity(), OnRecyclerItemClickListener<Favourite
 		}
 	}
 
-	override fun onItemLongClick(item: FavouriteCategory, position: Int, view: View): Boolean {
+	override fun onItemLongClick(item: FavouriteCategory, view: View): Boolean {
 		reorderHelper.startDrag(
-			recyclerView.findViewHolderForAdapterPosition(position) ?: return false
+			recyclerView.findContainingViewHolder(view) ?: return false
 		)
 		return true
 	}
 
 	private fun onCategoriesChanged(categories: List<FavouriteCategory>) {
-		adapter.replaceData(categories)
+		adapter.items = categories
 		textView_holder.isVisible = categories.isEmpty()
 	}
 
@@ -102,8 +102,7 @@ class CategoriesActivity : BaseActivity(), OnRecyclerItemClickListener<Favourite
 		): Boolean {
 			val oldPos = viewHolder.bindingAdapterPosition
 			val newPos = target.bindingAdapterPosition
-			adapter.moveItem(oldPos, newPos)
-			viewModel.storeCategoriesOrder(adapter.items.map { it.id })
+			viewModel.reorderCategories(oldPos, newPos)
 			return true
 		}
 

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/CategoriesAdapter.kt

@@ -1,49 +1,27 @@
 package org.koitharu.kotatsu.favourites.ui.categories
 
-import android.annotation.SuppressLint
-import android.view.MotionEvent
-import android.view.ViewGroup
-import kotlinx.android.synthetic.main.item_category.*
-import org.koitharu.kotatsu.base.ui.list.BaseRecyclerAdapter
-import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
-import org.koitharu.kotatsu.base.ui.list.OnRecyclerItemClickListener
+import androidx.recyclerview.widget.DiffUtil
+import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
+import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.model.FavouriteCategory
+import kotlin.jvm.internal.Intrinsics
 
-class CategoriesAdapter(private val onItemClickListener: OnRecyclerItemClickListener<FavouriteCategory>) :
-	BaseRecyclerAdapter<FavouriteCategory, Unit>() {
+class CategoriesAdapter(
+	onItemClickListener: OnListItemClickListener<FavouriteCategory>
+) : AsyncListDifferDelegationAdapter<FavouriteCategory>(DiffCallback()) {
 
-	override fun onCreateViewHolder(parent: ViewGroup) = CategoryHolder(parent)
-
-	override fun onGetItemId(item: FavouriteCategory) = item.id
-
-	override fun getExtra(item: FavouriteCategory, position: Int) = Unit
-
-	@SuppressLint("ClickableViewAccessibility")
-	override fun onViewAttachedToWindow(holder: BaseViewHolder<FavouriteCategory, Unit>) {
-		holder.imageView_more.setOnClickListener { v ->
-			onItemClickListener.onItemClick(holder.requireData(), holder.bindingAdapterPosition, v)
-		}
-		holder.imageView_handle.setOnTouchListener { v, event ->
-			if (event.actionMasked == MotionEvent.ACTION_DOWN) {
-				onItemClickListener.onItemLongClick(
-					holder.requireData(),
-					holder.bindingAdapterPosition,
-					v
-				)
-			} else {
-				false
-			}
-		}
+	init {
+		delegatesManager.addDelegate(categoryAD(onItemClickListener))
 	}
 
-	override fun onViewDetachedFromWindow(holder: BaseViewHolder<FavouriteCategory, Unit>) {
-		holder.imageView_more.setOnClickListener(null)
-		holder.imageView_handle.setOnTouchListener(null)
-	}
+	private class DiffCallback : DiffUtil.ItemCallback<FavouriteCategory>() {
 
-	fun moveItem(oldPos: Int, newPos: Int) {
-		val item = dataSet.removeAt(oldPos)
-		dataSet.add(newPos, item)
-		notifyItemMoved(oldPos, newPos)
+		override fun areItemsTheSame(oldItem: FavouriteCategory, newItem: FavouriteCategory): Boolean {
+			return oldItem.id == newItem.id
+		}
+
+		override fun areContentsTheSame(oldItem: FavouriteCategory, newItem: FavouriteCategory): Boolean {
+			return Intrinsics.areEqual(oldItem, newItem)
+		}
 	}
 }

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/CategoryAD.kt

@@ -0,0 +1,29 @@
+package org.koitharu.kotatsu.favourites.ui.categories
+
+import android.view.MotionEvent
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateLayoutContainer
+import kotlinx.android.synthetic.main.item_category.*
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.model.FavouriteCategory
+
+fun categoryAD(
+	clickListener: OnListItemClickListener<FavouriteCategory>
+) = adapterDelegateLayoutContainer<FavouriteCategory, FavouriteCategory>(R.layout.item_category) {
+
+	imageView_more.setOnClickListener {
+		clickListener.onItemClick(item, it)
+	}
+	@Suppress("ClickableViewAccessibility")
+	imageView_handle.setOnTouchListener { v, event ->
+		if (event.actionMasked == MotionEvent.ACTION_DOWN) {
+			clickListener.onItemLongClick(item, v)
+		} else {
+			false
+		}
+	}
+
+	bind {
+		textView_title.text = item.title
+	}
+}

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/CategoryHolder.kt

@@ -1,15 +0,0 @@
-package org.koitharu.kotatsu.favourites.ui.categories
-
-import android.view.ViewGroup
-import kotlinx.android.synthetic.main.item_category.*
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
-import org.koitharu.kotatsu.core.model.FavouriteCategory
-
-class CategoryHolder(parent: ViewGroup) :
-	BaseViewHolder<FavouriteCategory, Unit>(parent, R.layout.item_category) {
-
-	override fun onBind(data: FavouriteCategory, extra: Unit) {
-		textView_title.text = data.title
-	}
-}

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/FavouritesCategoriesViewModel.kt

@@ -1,9 +1,15 @@
 package org.koitharu.kotatsu.favourites.ui.categories
 
 import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.asLiveData
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.plus
 import org.koitharu.kotatsu.base.ui.BaseViewModel
-import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
 import org.koitharu.kotatsu.utils.ext.mapToSet
@@ -13,53 +19,47 @@ class FavouritesCategoriesViewModel(
 ) : BaseViewModel() {
 
 	private var reorderJob: Job? = null
+	private var mangaSubscription: Job? = null
 
-	val categories = MutableLiveData<List<FavouriteCategory>>()
-	val mangaCategories = MutableLiveData<Set<Int>>()
+	val categories = repository.observeCategories()
+		.asLiveData(viewModelScope.coroutineContext + Dispatchers.Default)
+	val mangaCategories = MutableLiveData<Set<Long>>(emptySet())
 
-	init {
-		loadAllCategories()
-	}
-
-	fun loadAllCategories() {
-		launchJob {
-			categories.value = repository.getAllCategories()
-		}
-	}
-
-	fun loadMangaCategories(manga: Manga) {
-		launchJob {
-			val categories = repository.getCategories(manga.id)
-			mangaCategories.value = categories.mapToSet { it.id.toInt() }
-		}
+	fun observeMangaCategories(mangaId: Long) {
+		mangaSubscription?.cancel()
+		mangaSubscription = repository.observeCategories(mangaId)
+			.map { list -> list.mapToSet { it.id } }
+			.onEach { mangaCategories.postValue(it) }
+			.launchIn(viewModelScope + Dispatchers.Default)
 	}
 
 	fun createCategory(name: String) {
 		launchJob {
 			repository.addCategory(name)
-			categories.value = repository.getAllCategories()
 		}
 	}
 
 	fun renameCategory(id: Long, name: String) {
 		launchJob {
 			repository.renameCategory(id, name)
-			categories.value = repository.getAllCategories()
 		}
 	}
 
 	fun deleteCategory(id: Long) {
 		launchJob {
 			repository.removeCategory(id)
-			categories.value = repository.getAllCategories()
 		}
 	}
 
-	fun storeCategoriesOrder(orderedIds: List<Long>) {
+	fun reorderCategories(oldPos: Int, newPos: Int) {
 		val prevJob = reorderJob
 		reorderJob = launchJob {
 			prevJob?.join()
-			repository.reorderCategories(orderedIds)
+			val items = categories.value ?: error("This should not happen")
+			val ids = items.mapTo(ArrayList(items.size)) { it.id }
+			val item = ids.removeAt(oldPos)
+			ids.add(newPos, item)
+			repository.reorderCategories(ids)
 		}
 	}
 

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/select/CategoriesSelectAdapter.kt

@@ -1,9 +1,8 @@
 package org.koitharu.kotatsu.favourites.ui.categories.select
 
-import android.util.SparseBooleanArray
 import android.view.ViewGroup
 import android.widget.Checkable
-import androidx.core.util.set
+import androidx.collection.ArraySet
 import org.koitharu.kotatsu.base.ui.list.BaseRecyclerAdapter
 import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
 import org.koitharu.kotatsu.core.model.FavouriteCategory
@@ -11,18 +10,15 @@ import org.koitharu.kotatsu.core.model.FavouriteCategory
 class CategoriesSelectAdapter(private val listener: OnCategoryCheckListener) :
 	BaseRecyclerAdapter<FavouriteCategory, Boolean>() {
 
-	private val checkedIds = SparseBooleanArray()
+	private val checkedIds = ArraySet<Long>()
 
-	fun setCheckedIds(ids: Iterable<Int>) {
+	fun setCheckedIds(ids: Iterable<Long>) {
 		checkedIds.clear()
-		ids.forEach {
-			checkedIds[it] = true
-		}
+		checkedIds.addAll(ids)
 		notifyDataSetChanged()
 	}
 
-	override fun getExtra(item: FavouriteCategory, position: Int) =
-		checkedIds.get(item.id.toInt(), false)
+	override fun getExtra(item: FavouriteCategory, position: Int) = item.id in checkedIds
 
 	override fun onCreateViewHolder(parent: ViewGroup) =
 		CategoryCheckableHolder(

app/src/main/java/org/koitharu/kotatsu/favourites/ui/categories/select/FavouriteCategoriesDialog.kt

@@ -36,7 +36,7 @@ class FavouriteCategoriesDialog : BaseBottomSheet(R.layout.dialog_favorite_categ
 			createCategory()
 		}
 		manga?.let {
-			viewModel.loadMangaCategories(it)
+			viewModel.observeMangaCategories(it.id)
 		}
 
 		viewModel.categories.observe(viewLifecycleOwner, ::onCategoriesChanged)
@@ -53,7 +53,7 @@ class FavouriteCategoriesDialog : BaseBottomSheet(R.layout.dialog_favorite_categ
 		adapter?.replaceData(categories)
 	}
 
-	private fun onCheckedCategoriesChanged(checkedIds: Set<Int>) {
+	private fun onCheckedCategoriesChanged(checkedIds: Set<Long>) {
 		adapter?.setCheckedIds(checkedIds)
 	}
 

app/src/main/java/org/koitharu/kotatsu/tracker/ui/FeedFragment.kt

@@ -44,9 +44,6 @@ class FeedFragment : BaseFragment(R.layout.fragment_tracklogs), PaginationScroll
 		)
 		recyclerView.setHasFixedSize(true)
 		recyclerView.addOnScrollListener(PaginationScrollListener(4, this))
-		if (savedInstanceState == null) {
-			onScrolledToEnd()
-		}
 
 		viewModel.content.observe(viewLifecycleOwner, this::onListChanged)
 		viewModel.isLoading.observe(viewLifecycleOwner, this::onLoadingStateChanged)

app/src/main/java/org/koitharu/kotatsu/tracker/ui/FeedViewModel.kt

@@ -9,7 +9,6 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.drop
-import kotlinx.coroutines.flow.onEach
 import org.koitharu.kotatsu.base.ui.BaseViewModel
 import org.koitharu.kotatsu.core.model.TrackingLogItem
 import org.koitharu.kotatsu.list.ui.model.IndeterminateProgress
@@ -28,9 +27,7 @@ class FeedViewModel(
 
 	val isEmptyState = MutableLiveData(false)
 	val content = combine(
-		logList.drop(1).onEach {
-			isEmptyState.postValue(it.isEmpty())
-		}.mapItems {
+		logList.drop(1).mapItems {
 			it.toFeedItem(context.resources)
 		},
 		hasNextPage
@@ -53,6 +50,8 @@ class FeedViewModel(
 				logList.value = list
 			} else if (list.isNotEmpty()) {
 				logList.value += list
+			} else {
+				isEmptyState.value = true
 			}
 			hasNextPage.value = list.isNotEmpty()
 		}