Show current filter in list header

app/src/main/java/org/koitharu/kotatsu/base/ui/widgets/ChipsView.kt

@@ -22,12 +22,21 @@ class ChipsView @JvmOverloads constructor(
 	private var chipOnClickListener = OnClickListener {
 		onChipClickListener?.onChipClick(it as Chip, it.tag)
 	}
+	private var chipOnCloseListener = OnClickListener {
+		onChipCloseClickListener?.onChipCloseClick(it as Chip, it.tag)
+	}
 	var onChipClickListener: OnChipClickListener? = null
 		set(value) {
 			field = value
 			val isChipClickable = value != null
 			children.forEach { it.isClickable = isChipClickable }
 		}
+	var onChipCloseClickListener: OnChipCloseClickListener? = null
+		set(value) {
+			field = value
+			val isCloseIconVisible = value != null
+			children.forEach { (it as? Chip)?.isCloseIconVisible = isCloseIconVisible }
+		}
 
 	override fun requestLayout() {
 		if (isLayoutSuppressedCompat) {
@@ -69,7 +78,8 @@ class ChipsView @JvmOverloads constructor(
 		val drawable = ChipDrawable.createFromAttributes(context, null, 0, R.style.Widget_Kotatsu_Chip)
 		chip.setChipDrawable(drawable)
 		chip.setTextColor(ContextCompat.getColor(context, R.color.color_primary))
-		chip.isCloseIconVisible = false
+		chip.isCloseIconVisible = onChipCloseClickListener != null
+		chip.setOnCloseIconClickListener(chipOnCloseListener)
 		chip.setEnsureMinTouchTargetSize(false)
 		chip.setOnClickListener(chipOnClickListener)
 		addView(chip)
@@ -96,4 +106,9 @@ class ChipsView @JvmOverloads constructor(
 
 		fun onChipClick(chip: Chip, data: Any?)
 	}
+
+	fun interface OnChipCloseClickListener {
+
+		fun onChipCloseClick(chip: Chip, data: Any?)
+	}
 }

app/src/main/java/org/koitharu/kotatsu/list/ui/MangaListFragment.kt

@@ -71,7 +71,13 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 		super.onViewCreated(view, savedInstanceState)
 		drawer = binding.root as? DrawerLayout
 		drawer?.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
-		listAdapter = MangaListAdapter(get(), viewLifecycleOwner, this, ::resolveException)
+		listAdapter = MangaListAdapter(
+			coil = get(),
+			lifecycleOwner = viewLifecycleOwner,
+			clickListener = this,
+			onRetryClick = ::resolveException,
+			onTagRemoveClick = viewModel::onRemoveFilterTag
+		)
 		paginationListener = PaginationScrollListener(4, this)
 		with(binding.recyclerView) {
 			setHasFixedSize(true)
@@ -287,7 +293,7 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 	final override fun getSectionTitle(position: Int): CharSequence? {
 		return when (binding.recyclerViewFilter.adapter?.getItemViewType(position)) {
 			FilterAdapter.VIEW_TYPE_SORT -> getString(R.string.sort_order)
-			FilterAdapter.VIEW_TYPE_TAG -> getString(R.string.genre)
+			FilterAdapter.VIEW_TYPE_TAG -> getString(R.string.genres)
 			else -> null
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/list/ui/MangaListViewModel.kt

@@ -6,6 +6,7 @@ import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.*
 import org.koitharu.kotatsu.base.ui.BaseViewModel
+import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ListMode
 import org.koitharu.kotatsu.list.ui.model.ListModel
@@ -36,6 +37,8 @@ abstract class MangaListViewModel(
 			}
 		}
 
+	open fun onRemoveFilterTag(tag: MangaTag) = Unit
+
 	abstract fun onRefresh()
 
 	abstract fun onRetry()

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/CurrentFilterAD.kt

@@ -0,0 +1,23 @@
+package org.koitharu.kotatsu.list.ui.adapter
+
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.base.ui.widgets.ChipsView
+import org.koitharu.kotatsu.core.model.MangaTag
+import org.koitharu.kotatsu.databinding.ItemCurrentFilterBinding
+import org.koitharu.kotatsu.list.ui.model.CurrentFilterModel
+import org.koitharu.kotatsu.list.ui.model.ListModel
+
+fun currentFilterAD(
+	onTagRemoveClick: (MangaTag) -> Unit,
+) = adapterDelegateViewBinding<CurrentFilterModel, ListModel, ItemCurrentFilterBinding>(
+	{ inflater, parent -> ItemCurrentFilterBinding.inflate(inflater, parent, false) }
+) {
+
+	binding.chipsTags.onChipCloseClickListener = ChipsView.OnChipCloseClickListener { chip, data ->
+		onTagRemoveClick(data as? MangaTag ?: return@OnChipCloseClickListener)
+	}
+
+	bind {
+		binding.chipsTags.setChips(item.chips)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/MangaListAdapter.kt

@@ -6,6 +6,7 @@ import coil.ImageLoader
 import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
 import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.core.ui.DateTimeAgo
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.MangaGridModel
@@ -17,7 +18,8 @@ class MangaListAdapter(
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
 	clickListener: OnListItemClickListener<Manga>,
-	onRetryClick: (Throwable) -> Unit
+	onRetryClick: (Throwable) -> Unit,
+	onTagRemoveClick: (MangaTag) -> Unit,
 ) : AsyncListDifferDelegationAdapter<ListModel>(DiffCallback()) {
 
 	init {
@@ -38,6 +40,7 @@ class MangaListAdapter(
 			.addDelegate(ITEM_TYPE_ERROR_FOOTER, errorFooterAD(onRetryClick))
 			.addDelegate(ITEM_TYPE_EMPTY, emptyStateListAD())
 			.addDelegate(ITEM_TYPE_HEADER, listHeaderAD())
+			.addDelegate(ITEM_TYPE_FILTER, currentFilterAD(onTagRemoveClick))
 	}
 
 	fun setItems(list: List<ListModel>, commitCallback: Runnable) {
@@ -79,5 +82,6 @@ class MangaListAdapter(
 		const val ITEM_TYPE_ERROR_FOOTER = 7
 		const val ITEM_TYPE_EMPTY = 8
 		const val ITEM_TYPE_HEADER = 9
+		const val ITEM_TYPE_FILTER = 10
 	}
 }

app/src/main/java/org/koitharu/kotatsu/list/ui/model/CurrentFilterModel.kt

@@ -0,0 +1,7 @@
+package org.koitharu.kotatsu.list.ui.model
+
+import org.koitharu.kotatsu.base.ui.widgets.ChipsView
+
+data class CurrentFilterModel(
+	val chips: Collection<ChipsView.ChipModel>,
+) : ListModel

app/src/main/java/org/koitharu/kotatsu/remotelist/ui/RemoteListViewModel.kt

@@ -7,8 +7,10 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.combine
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.base.ui.widgets.ChipsView
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaFilter
+import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
@@ -40,8 +42,9 @@ class RemoteListViewModel(
 			list == null -> listOf(LoadingState)
 			list.isEmpty() -> listOf(EmptyState(R.drawable.ic_book_cross, R.string.nothing_found, R.string._empty))
 			else -> {
-				val result = ArrayList<ListModel>(list.size + 2)
+				val result = ArrayList<ListModel>(list.size + 3)
 				result += headerModel
+				createFilterModel()?.let { result.add(it) }
 				list.toUi(result, mode)
 				when {
 					error != null -> result += error.toErrorFooter()
@@ -65,6 +68,16 @@ class RemoteListViewModel(
 		loadList(append = !mangaList.value.isNullOrEmpty())
 	}
 
+	override fun onRemoveFilterTag(tag: MangaTag) {
+		val filter = appliedFilter ?: return
+		if (tag !in filter.tags) {
+			return
+		}
+		applyFilter(
+			filter.copy(tags = filter.tags - tag)
+		)
+	}
+
 	fun loadNextPage() {
 		if (hasNextPage.value && listError.value == null) {
 			loadList(append = true)
@@ -108,6 +121,10 @@ class RemoteListViewModel(
 		}
 	}
 
+	private fun createFilterModel() = appliedFilter?.run {
+		CurrentFilterModel(tags.map { ChipsView.ChipModel(0, it.title, it) })
+	}
+
 	private fun loadFilter() {
 		launchJob(Dispatchers.Default) {
 			try {

app/src/main/res/layout/item_current_filter.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<HorizontalScrollView
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content">
+
+	<org.koitharu.kotatsu.base.ui.widgets.ChipsView
+		android:id="@+id/chips_tags"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		app:closeIconEnabled="true"
+		app:singleLine="true" />
+
+</HorizontalScrollView>

app/src/main/res/values-ru/strings.xml

@@ -236,4 +236,5 @@
 	<string name="auth_complete">Авторизация выполнена</string>
 	<string name="auth_not_supported_by">Авторизация в %s не поддерживается</string>
 	<string name="text_clear_cookies_prompt">Вы выйдете из всех источников, в которых Вы авторизованы</string>
+    <string name="genres">Жанры</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -239,4 +239,5 @@
 	<string name="auth_complete">Authorization complete</string>
 	<string name="auth_not_supported_by">Authorization on %s is not supported</string>
 	<string name="text_clear_cookies_prompt">You will be logged out from all sources that you are authorized in</string>
+    <string name="genres">Genres</string>
 </resources>