Release 0.4.1

* Implement language switching using BaseActivity

* Add requested changes

* Cleanup App.kt Imports and add pref_language_key

* Acutally use @string for key

* Use string resource for language preference title

app/build.gradle

@@ -38,8 +38,8 @@ android {
         minSdkVersion 16
         targetSdkVersion 25
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        versionCode 16
+        versionCode 17
-        versionName "0.4.0"
+        versionName "0.4.1"
 
         buildConfigField "String", "COMMIT_COUNT", "\"${getCommitCount()}\""
         buildConfigField "String", "COMMIT_SHA", "\"${getGitSha()}\""

app/src/main/java/eu/kanade/tachiyomi/App.kt

@@ -2,10 +2,12 @@ package eu.kanade.tachiyomi
 
 import android.app.Application
 import android.content.Context
+import android.content.res.Configuration
 import android.support.multidex.MultiDex
 import com.evernote.android.job.JobManager
 import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
 import eu.kanade.tachiyomi.data.updater.UpdateCheckerJob
+import eu.kanade.tachiyomi.util.LocaleHelper
 import org.acra.ACRA
 import org.acra.annotation.ReportsCrashes
 import timber.log.Timber
@@ -31,6 +33,8 @@ open class App : Application() {
 
         setupAcra()
         setupJobManager()
+
+        LocaleHelper.updateCfg(this, baseContext.resources.configuration)
     }
 
     override fun attachBaseContext(base: Context) {
@@ -40,6 +44,11 @@ open class App : Application() {
         }
     }
 
+    override fun onConfigurationChanged(newConfig: Configuration) {
+        super.onConfigurationChanged(newConfig)
+        LocaleHelper.updateCfg(this, newConfig)
+    }
+
     protected open fun setupAcra() {
         ACRA.init(this)
     }

app/src/main/java/eu/kanade/tachiyomi/Constants.kt

@@ -6,4 +6,5 @@ object Constants {
     const val NOTIFICATION_DOWNLOAD_CHAPTER_ID = 3
     const val NOTIFICATION_DOWNLOAD_CHAPTER_ERROR_ID = 4
     const val NOTIFICATION_DOWNLOAD_IMAGE_ID = 5
+
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/queries/HistoryQueries.kt

@@ -40,7 +40,6 @@ interface HistoryQueries : DbProvider {
                     .build())
             .prepare()
 
-
     /**
      * Updates the history last read.
      * Inserts history object if not yet in database

app/src/main/java/eu/kanade/tachiyomi/data/database/queries/MangaQueries.kt

@@ -7,6 +7,7 @@ import eu.kanade.tachiyomi.data.database.DbProvider
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.database.resolvers.LibraryMangaGetResolver
 import eu.kanade.tachiyomi.data.database.resolvers.MangaFlagsPutResolver
+import eu.kanade.tachiyomi.data.database.resolvers.MangaLastUpdatedPutResolver
 import eu.kanade.tachiyomi.data.database.tables.ChapterTable
 import eu.kanade.tachiyomi.data.database.tables.MangaCategoryTable
 import eu.kanade.tachiyomi.data.database.tables.MangaTable
@@ -29,7 +30,7 @@ interface MangaQueries : DbProvider {
             .withGetResolver(LibraryMangaGetResolver.INSTANCE)
             .prepare()
 
-    open fun getFavoriteMangas() = db.get()
+    fun getFavoriteMangas() = db.get()
             .listOfObjects(Manga::class.java)
             .withQuery(Query.builder()
                     .table(MangaTable.TABLE)
@@ -66,6 +67,11 @@ interface MangaQueries : DbProvider {
             .withPutResolver(MangaFlagsPutResolver())
             .prepare()
 
+    fun updateLastUpdated(manga: Manga) = db.put()
+            .`object`(manga)
+            .withPutResolver(MangaLastUpdatedPutResolver())
+            .prepare()
+
     fun deleteManga(manga: Manga) = db.delete().`object`(manga).prepare()
 
     fun deleteMangas(mangas: List<Manga>) = db.delete().objects(mangas).prepare()
@@ -78,4 +84,11 @@ interface MangaQueries : DbProvider {
                     .build())
             .prepare()
 
+    fun getLastReadManga() = db.get()
+            .listOfObjects(Manga::class.java)
+            .withQuery(RawQuery.builder()
+                    .query(getLastReadMangaQuery())
+                    .observesTables(MangaTable.TABLE)
+                    .build())
+            .prepare()
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/queries/RawQueries.kt

@@ -73,6 +73,18 @@ fun getHistoryByMangaId() = """
     WHERE ${Chapter.TABLE}.${Chapter.COL_MANGA_ID} = ? AND ${History.TABLE}.${History.COL_CHAPTER_ID} = ${Chapter.TABLE}.${Chapter.COL_ID}
 """
 
+fun getLastReadMangaQuery() = """
+    SELECT ${Manga.TABLE}.*, MAX(${History.TABLE}.${History.COL_LAST_READ}) AS max
+    FROM ${Manga.TABLE}
+    JOIN ${Chapter.TABLE}
+    ON ${Manga.TABLE}.${Manga.COL_ID} = ${Chapter.TABLE}.${Chapter.COL_MANGA_ID}
+    JOIN ${History.TABLE}
+    ON ${Chapter.TABLE}.${Chapter.COL_ID} = ${History.TABLE}.${History.COL_CHAPTER_ID}
+    WHERE ${Manga.TABLE}.${Manga.COL_FAVORITE} = 1
+    GROUP BY ${Manga.TABLE}.${Manga.COL_ID}
+    ORDER BY max DESC
+"""
+
 /**
  * Query to get the categories for a manga.
  */

app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaLastUpdatedPutResolver.kt

@@ -0,0 +1,33 @@
+package eu.kanade.tachiyomi.data.database.resolvers
+
+import android.content.ContentValues
+import com.pushtorefresh.storio.sqlite.StorIOSQLite
+import com.pushtorefresh.storio.sqlite.operations.put.PutResolver
+import com.pushtorefresh.storio.sqlite.operations.put.PutResult
+import com.pushtorefresh.storio.sqlite.queries.UpdateQuery
+import eu.kanade.tachiyomi.data.database.inTransactionReturn
+import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.database.tables.MangaTable
+
+class MangaLastUpdatedPutResolver : PutResolver<Manga>() {
+
+    override fun performPut(db: StorIOSQLite, manga: Manga) = db.inTransactionReturn {
+        val updateQuery = mapToUpdateQuery(manga)
+        val contentValues = mapToContentValues(manga)
+
+        val numberOfRowsUpdated = db.lowLevel().update(updateQuery, contentValues)
+        PutResult.newUpdateResult(numberOfRowsUpdated, updateQuery.table())
+    }
+
+    fun mapToUpdateQuery(manga: Manga) = UpdateQuery.builder()
+            .table(MangaTable.TABLE)
+            .where("${MangaTable.COL_ID} = ?")
+            .whereArgs(manga.id)
+            .build()
+
+    fun mapToContentValues(manga: Manga) = ContentValues(1).apply {
+        put(MangaTable.COL_LAST_UPDATE, manga.last_update)
+    }
+
+}
+

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt

@@ -110,6 +110,15 @@ class DownloadManager(context: Context) {
         }
     }
 
+    /**
+     * Returns the directory name for a manga.
+     *
+     * @param manga the manga to query.
+     */
+    fun getMangaDirName(manga: Manga): String {
+        return provider.getMangaDirName(manga)
+    }
+
     /**
      * Returns the directory name for the given chapter.
      *
@@ -119,6 +128,15 @@ class DownloadManager(context: Context) {
         return provider.getChapterDirName(chapter)
     }
 
+    /**
+     * Returns the download directory for a source if it exists.
+     *
+     * @param source the source to query.
+     */
+    fun findSourceDir(source: Source): UniFile? {
+        return provider.findSourceDir(source)
+    }
+
     /**
      * Returns the directory for the given manga, if it exists.
      *

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt

@@ -6,6 +6,7 @@ import com.hippo.unifile.UniFile
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.data.source.Source
 import eu.kanade.tachiyomi.util.DiskUtil
 import uy.kohesive.injekt.injectLazy
@@ -26,10 +27,13 @@ class DownloadProvider(private val context: Context) {
     /**
      * The root directory for downloads.
      */
-    private lateinit var downloadsDir: UniFile
+    private var downloadsDir = preferences.downloadsDirectory().getOrDefault().let {
+        UniFile.fromUri(context, Uri.parse(it))
+    }
 
     init {
         preferences.downloadsDirectory().asObservable()
+                .skip(1)
                 .subscribe { downloadsDir = UniFile.fromUri(context, Uri.parse(it)) }
     }
 
@@ -45,6 +49,15 @@ class DownloadProvider(private val context: Context) {
                 .createDirectory(getMangaDirName(manga))
     }
 
+    /**
+     * Returns the download directory for a source if it exists.
+     *
+     * @param source the source to query.
+     */
+    fun findSourceDir(source: Source): UniFile? {
+        return downloadsDir.findFile(getSourceDirName(source))
+    }
+
     /**
      * Returns the download directory for a manga if it exists.
      *
@@ -52,7 +65,7 @@ class DownloadProvider(private val context: Context) {
      * @param manga the manga to query.
      */
     fun findMangaDir(source: Source, manga: Manga): UniFile? {
-        val sourceDir = downloadsDir.findFile(getSourceDirName(source))
+        val sourceDir = findSourceDir(source)
         return sourceDir?.findFile(getMangaDirName(manga))
     }
 

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -13,7 +13,10 @@ import eu.kanade.tachiyomi.Constants
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Category
+import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.data.download.DownloadManager
+import eu.kanade.tachiyomi.data.download.DownloadService
 import eu.kanade.tachiyomi.data.library.LibraryUpdateService.Companion.start
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
@@ -53,6 +56,8 @@ class LibraryUpdateService : Service() {
      */
     val preferences: PreferencesHelper by injectLazy()
 
+    val downloadManager: DownloadManager by injectLazy()
+
     /**
      * Wake lock that will be held until the service is destroyed.
      */
@@ -243,32 +248,55 @@ class LibraryUpdateService : Service() {
                             // If there's any error, return empty update and continue.
                             .onErrorReturn {
                                 failedUpdates.add(manga)
-                                Pair(0, 0)
+                                Pair(emptyList<Chapter>(), emptyList<Chapter>())
                             }
                             // Filter out mangas without new chapters (or failed).
-                            .filter { pair -> pair.first > 0 }
+                            .filter { pair -> pair.first.size > 0 }
+                            .doOnNext {
+                                if (preferences.downloadNew()) {
+                                    downloadChapters(manga, it.first)
+                                }
+                            }
                             // Convert to the manga that contains new chapters.
                             .map { manga }
                 }
                 // Add manga with new chapters to the list.
-                .doOnNext { newUpdates.add(it) }
+                .doOnNext { manga ->
+                    // Set last updated time
+                    manga.last_update = Date().time
+                    db.updateLastUpdated(manga).executeAsBlocking()
+                    // Add to the list
+                    newUpdates.add(manga)
+                }
                 // Notify result of the overall update.
                 .doOnCompleted {
                     if (newUpdates.isEmpty()) {
                         cancelNotification()
                     } else {
+                        if (preferences.downloadNew()) {
+                            DownloadService.start(this)
+                        }
                         showResultNotification(newUpdates, failedUpdates)
                     }
                 }
     }
 
+    fun downloadChapters(manga: Manga, chapters: List<Chapter>) {
+        // we need to get the chapters from the db so we have chapter ids
+        val mangaChapters = db.getChapters(manga).executeAsBlocking()
+        val dbChapters = chapters.map {
+            mangaChapters.find { mangaChapter -> mangaChapter.url == it.url }!!
+        }
+        downloadManager.downloadChapters(manga, dbChapters)
+    }
+
     /**
      * Updates the chapters for the given manga and adds them to the database.
      *
      * @param manga the manga to update.
      * @return a pair of the inserted and removed chapters.
      */
-    fun updateManga(manga: Manga): Observable<Pair<Int, Int>> {
+    fun updateManga(manga: Manga): Observable<Pair<List<Chapter>, List<Chapter>>> {
         val source = sourceManager.get(manga.source) as? OnlineSource ?: return Observable.empty()
         return source.fetchChapterList(manga)
                 .map { syncChaptersWithSource(db, it, manga, source) }

app/src/main/java/eu/kanade/tachiyomi/data/network/OkHttpExtensions.kt

@@ -46,6 +46,15 @@ fun Call.asObservable(): Observable<Response> {
     }
 }
 
+fun Call.asObservableSuccess(): Observable<Response> {
+    return asObservable().doOnNext { response ->
+        if (!response.isSuccessful) {
+            response.close()
+            throw Exception("Unsuccessful code ${response.code()}")
+        }
+    }
+}
+
 fun OkHttpClient.newCallWithProgress(request: Request, listener: ProgressListener): Call {
     val progressClient = newBuilder()
             .cache(null)

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -83,10 +83,14 @@ class PreferenceKeys(context: Context) {
 
     val filterUnread = context.getString(R.string.pref_filter_unread_key)
 
+    val librarySortingMode = context.getString(R.string.pref_library_sorting_mode_key)
+
     val automaticUpdates = context.getString(R.string.pref_enable_automatic_updates_key)
 
     val startScreen = context.getString(R.string.pref_start_screen_key)
 
+    val downloadNew = context.getString(R.string.pref_download_new_key)
+
     fun sourceUsername(sourceId: Int) = "pref_source_username_$sourceId"
 
     fun sourcePassword(sourceId: Int) = "pref_source_password_$sourceId"
@@ -97,4 +101,6 @@ class PreferenceKeys(context: Context) {
 
     val libraryAsList = context.getString(R.string.pref_display_library_as_list)
 
+    val lang = context.getString(R.string.pref_language_key)
+
 }

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -13,6 +13,8 @@ import java.io.File
 
 fun <T> Preference<T>.getOrDefault(): T = get() ?: defaultValue()!!
 
+fun Preference<Boolean>.invert(): Boolean = getOrDefault().let { set(!it); !it }
+
 class PreferencesHelper(context: Context) {
 
     val keys = PreferenceKeys(context)
@@ -126,8 +128,16 @@ class PreferencesHelper(context: Context) {
 
     fun filterUnread() = rxPrefs.getBoolean(keys.filterUnread, false)
 
+    fun librarySortingMode() = rxPrefs.getInteger(keys.librarySortingMode, 0)
+
+    fun librarySortingAscending() = rxPrefs.getBoolean("library_sorting_ascending", true)
+
     fun automaticUpdates() = prefs.getBoolean(keys.automaticUpdates, false)
 
     fun hiddenCatalogues() = rxPrefs.getStringSet("hidden_catalogues", emptySet())
 
+    fun downloadNew() = prefs.getBoolean(keys.downloadNew, false)
+
+    fun lang() = prefs.getInt(keys.lang, 0)
+
 }

app/src/main/java/eu/kanade/tachiyomi/data/source/online/OnlineSource.kt

@@ -6,7 +6,7 @@ import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.network.GET
 import eu.kanade.tachiyomi.data.network.NetworkHelper
-import eu.kanade.tachiyomi.data.network.asObservable
+import eu.kanade.tachiyomi.data.network.asObservableSuccess
 import eu.kanade.tachiyomi.data.network.newCallWithProgress
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.source.Language
@@ -93,7 +93,7 @@ abstract class OnlineSource() : Source {
      */
     open fun fetchPopularManga(page: MangasPage): Observable<MangasPage> = client
             .newCall(popularMangaRequest(page))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
                 popularMangaParse(response, page)
                 page
@@ -136,7 +136,7 @@ abstract class OnlineSource() : Source {
      */
     open fun fetchSearchManga(page: MangasPage, query: String, filters: List<Filter>): Observable<MangasPage> = client
             .newCall(searchMangaRequest(page, query, filters))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
                 searchMangaParse(response, page, query, filters)
                 page
@@ -178,7 +178,7 @@ abstract class OnlineSource() : Source {
      */
     open fun fetchLatestUpdates(page: MangasPage): Observable<MangasPage> = client
             .newCall(latestUpdatesRequest(page))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
                 latestUpdatesParse(response, page)
                 page
@@ -212,7 +212,7 @@ abstract class OnlineSource() : Source {
      */
     override fun fetchMangaDetails(manga: Manga): Observable<Manga> = client
             .newCall(mangaDetailsRequest(manga))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
                 Manga.create(manga.url, id).apply {
                     mangaDetailsParse(response, this)
@@ -246,7 +246,7 @@ abstract class OnlineSource() : Source {
      */
     override fun fetchChapterList(manga: Manga): Observable<List<Chapter>> = client
             .newCall(chapterListRequest(manga))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
                 mutableListOf<Chapter>().apply {
                     chapterListParse(response, this)
@@ -292,11 +292,8 @@ abstract class OnlineSource() : Source {
      */
     open fun fetchPageListFromNetwork(chapter: Chapter): Observable<List<Page>> = client
             .newCall(pageListRequest(chapter))
-            .asObservable()
+            .asObservableSuccess()
             .map { response ->
-                if (!response.isSuccessful) {
-                    throw Exception("Webpage sent ${response.code()} code")
-                }
                 mutableListOf<Page>().apply {
                     pageListParse(response, this)
                     if (isEmpty()) {
@@ -338,7 +335,7 @@ abstract class OnlineSource() : Source {
         page.status = Page.LOAD_PAGE
         return client
                 .newCall(imageUrlRequest(page))
-                .asObservable()
+                .asObservableSuccess()
                 .map { imageUrlParse(it) }
                 .doOnError { page.status = Page.ERROR }
                 .onErrorReturn { null }
@@ -381,13 +378,7 @@ abstract class OnlineSource() : Source {
      */
     fun imageResponse(page: Page): Observable<Response> = client
             .newCallWithProgress(imageRequest(page), page)
-            .asObservable()
+            .asObservableSuccess()
-            .doOnNext {
-                if (!it.isSuccessful) {
-                    it.close()
-                    throw RuntimeException("Not a valid response")
-                }
-            }
 
     /**
      * Returns the request for getting the source image. Override only if it's needed to override

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseActivity.kt

@@ -1,9 +1,27 @@
 package eu.kanade.tachiyomi.ui.base.activity
 
 import android.support.v7.app.AppCompatActivity
+import eu.kanade.tachiyomi.util.LocaleHelper
 
 abstract class BaseActivity : AppCompatActivity(), ActivityMixin {
 
+    init {
+        LocaleHelper.updateCfg(this)
+    }
+
     override fun getActivity() = this
 
+    var resumed = false
+        private set
+
+    override fun onResume() {
+        super.onResume()
+        resumed = true
+    }
+
+    override fun onPause() {
+        resumed = false
+        super.onPause()
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseRxActivity.kt

@@ -3,10 +3,15 @@ package eu.kanade.tachiyomi.ui.base.activity
 import android.os.Bundle
 import eu.kanade.tachiyomi.App
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
+import eu.kanade.tachiyomi.util.LocaleHelper
 import nucleus.view.NucleusAppCompatActivity
 
 abstract class BaseRxActivity<P : BasePresenter<*>> : NucleusAppCompatActivity<P>(), ActivityMixin {
 
+    init {
+        LocaleHelper.updateCfg(this)
+    }
+
     override fun onCreate(savedState: Bundle?) {
         val superFactory = presenterFactory
         setPresenterFactory {
@@ -20,4 +25,17 @@ abstract class BaseRxActivity<P : BasePresenter<*>> : NucleusAppCompatActivity<P
 
     override fun getActivity() = this
 
+    var resumed = false
+        private set
+
+    override fun onResume() {
+        super.onResume()
+        resumed = true
+    }
+
+    override fun onPause() {
+        resumed = false
+        super.onPause()
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt

@@ -221,6 +221,7 @@ open class CatalogueFragment : BaseRxFragment<CataloguePresenter>(), FlexibleVie
 
         // Setup filters button
         menu.findItem(R.id.action_set_filter).apply {
+            icon.mutate()
             if (presenter.source.filters.isEmpty()) {
                 isEnabled = false
                 icon.alpha = 128

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CataloguePresenter.kt

@@ -21,7 +21,7 @@ import rx.schedulers.Schedulers
 import rx.subjects.PublishSubject
 import timber.log.Timber
 import uy.kohesive.injekt.injectLazy
-import java.util.NoSuchElementException
+import java.util.*
 
 /**
  * Presenter of [CatalogueFragment].

app/src/main/java/eu/kanade/tachiyomi/ui/category/CategoryActivity.kt

@@ -27,7 +27,9 @@ import nucleus.factory.RequiresPresenter
  * UI related actions should be called from here.
  */
 @RequiresPresenter(CategoryPresenter::class)
-class CategoryActivity : BaseRxActivity<CategoryPresenter>(), ActionMode.Callback, FlexibleViewHolder.OnListItemClickListener, OnStartDragListener {
+class CategoryActivity :
+        BaseRxActivity<CategoryPresenter>(),
+        ActionMode.Callback, FlexibleViewHolder.OnListItemClickListener, OnStartDragListener {
 
     /**
      * Object used to show actionMode toolbar.

app/src/main/java/eu/kanade/tachiyomi/ui/category/CategoryAdapter.kt

@@ -1,7 +1,6 @@
 package eu.kanade.tachiyomi.ui.category
 
 import android.view.ViewGroup
-import com.amulyakhare.textdrawable.util.ColorGenerator
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.models.Category
@@ -17,18 +16,10 @@ import java.util.*
  * @param activity activity that created adapter
  * @constructor Creates a CategoryAdapter object
  */
-class CategoryAdapter(private val activity: CategoryActivity) : FlexibleAdapter<CategoryHolder, Category>(), ItemTouchHelperAdapter {
+class CategoryAdapter(private val activity: CategoryActivity) :
-
+        FlexibleAdapter<CategoryHolder, Category>(), ItemTouchHelperAdapter {
-    /**
-     * Generator used to generate circle letter icons
-     */
-    private val generator: ColorGenerator
 
     init {
-        // Let generator use Material Design colors.
-        // Material design is love, material design is live!
-        generator = ColorGenerator.MATERIAL
-
         // Set unique id's
         setHasStableIds(true)
     }
@@ -54,7 +45,7 @@ class CategoryAdapter(private val activity: CategoryActivity) : FlexibleAdapter<
     override fun onBindViewHolder(holder: CategoryHolder, position: Int) {
         // Update holder values.
         val category = getItem(position)
-        holder.onSetValues(category, generator)
+        holder.onSetValues(category)
 
         //When user scrolls this bind the correct selection status
         holder.itemView.isActivated = isSelected(position)

app/src/main/java/eu/kanade/tachiyomi/ui/category/CategoryHolder.kt

@@ -24,7 +24,12 @@ import kotlinx.android.synthetic.main.item_edit_categories.view.*
  *
  * @constructor Create CategoryHolder object
  */
-class CategoryHolder(view: View, adapter: CategoryAdapter, listener: FlexibleViewHolder.OnListItemClickListener, dragListener: OnStartDragListener) : FlexibleViewHolder(view, adapter, listener) {
+class CategoryHolder(
+        view: View,
+        adapter: CategoryAdapter,
+        listener: FlexibleViewHolder.OnListItemClickListener,
+        dragListener: OnStartDragListener
+) : FlexibleViewHolder(view, adapter, listener) {
 
     init {
         // Create round letter image onclick to simulate long click
@@ -46,29 +51,31 @@ class CategoryHolder(view: View, adapter: CategoryAdapter, listener: FlexibleVie
      * Update category item values.
      *
      * @param category category of item.
-     * @param generator generator used to generate circle letter icons.
      */
-    fun onSetValues(category: Category, generator: ColorGenerator) {
+    fun onSetValues(category: Category) {
         // Set capitalized title.
         itemView.title.text = category.name.capitalize()
 
         // Update circle letter image.
-        itemView.image.setImageDrawable(getRound(category.name.substring(0, 1).toUpperCase(), generator))
+        itemView.post {
+            itemView.image.setImageDrawable(getRound(category.name.take(1).toUpperCase()))
+        }
     }
 
     /**
      * Returns circle letter image
      *
      * @param text first letter of string
-     * @param generator the generator used to generate circle letter image
      */
-    private fun getRound(text: String, generator: ColorGenerator): TextDrawable {
+    private fun getRound(text: String): TextDrawable {
+        val size = Math.min(itemView.image.width, itemView.image.height)
         return TextDrawable.builder()
                 .beginConfig()
+                .width(size)
+                .height(size)
                 .textColor(Color.WHITE)
                 .useFont(Typeface.DEFAULT)
-                .toUpperCase()
                 .endConfig()
-                .buildRound(text, generator.getColor(text))
+                .buildRound(text, ColorGenerator.MATERIAL.getColor(text))
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/download/DownloadHolder.kt

@@ -48,8 +48,9 @@ class DownloadHolder(private val view: View) : RecyclerView.ViewHolder(view) {
      * Updates the progress bar of the download.
      */
     fun notifyProgress() {
+        val pages = download.pages ?: return
         if (view.download_progress.max == 1) {
-            view.download_progress.max = download.pages!!.size * 100
+            view.download_progress.max = pages.size * 100
         }
         view.download_progress.progress = download.totalProgress
     }
@@ -58,7 +59,8 @@ class DownloadHolder(private val view: View) : RecyclerView.ViewHolder(view) {
      * Updates the text field of the number of downloaded pages.
      */
     fun notifyDownloadedPages() {
-        view.download_progress_text.text = "${download.downloadedImages}/${download.pages!!.size}"
+        val pages = download.pages ?: return
+        view.download_progress_text.text = "${download.downloadedImages}/${pages.size}"
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryAdapter.kt

@@ -23,7 +23,7 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
     /**
      * The list of manga in this category.
      */
-    private var mangas: List<Manga>? = null
+    private var mangas: List<Manga> = emptyList()
 
     init {
         setHasStableIds(true)
@@ -37,7 +37,7 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
     fun setItems(list: List<Manga>) {
         mItems = list
 
-        // A copy of manga that it's always unfiltered
+        // A copy of manga always unfiltered.
         mangas = ArrayList(list)
         updateDataSet(null)
     }
@@ -58,10 +58,8 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
      * @param param the filter. Not used.
      */
     override fun updateDataSet(param: String?) {
-        mangas?.let {
+        filterItems(mangas)
-            filterItems(it)
+        notifyDataSetChanged()
-            notifyDataSetChanged()
-        }
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryFragment.kt

@@ -3,9 +3,12 @@ package eu.kanade.tachiyomi.ui.library
 import android.app.Activity
 import android.content.Intent
 import android.content.res.Configuration
+import android.graphics.Color
 import android.os.Bundle
 import android.support.design.widget.TabLayout
+import android.support.v4.graphics.drawable.DrawableCompat
 import android.support.v4.view.ViewPager
+import android.support.v4.widget.DrawerLayout
 import android.support.v7.view.ActionMode
 import android.support.v7.widget.SearchView
 import android.view.*
@@ -20,6 +23,7 @@ import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.ui.base.fragment.BaseRxFragment
 import eu.kanade.tachiyomi.ui.category.CategoryActivity
 import eu.kanade.tachiyomi.ui.main.MainActivity
+import eu.kanade.tachiyomi.util.inflate
 import eu.kanade.tachiyomi.util.toast
 import kotlinx.android.synthetic.main.activity_main.*
 import kotlinx.android.synthetic.main.fragment_library.*
@@ -73,22 +77,36 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
      */
     private var selectedCoverManga: Manga? = null
 
-    /**
-     * Status of isFilterDownloaded
-     */
-    var isFilterDownloaded = false
-
-    /**
-     * Status of isFilterUnread
-     */
-    var isFilterUnread = false
-
     /**
      * Number of manga per row in grid mode.
      */
     var mangaPerRow = 0
         private set
 
+    /**
+     * Navigation view containing filter/sort/display items.
+     */
+    private lateinit var navView: LibraryNavigationView
+
+    /**
+     * Drawer listener to allow swipe only for closing the drawer.
+     */
+    private val drawerListener by lazy {
+        object : DrawerLayout.SimpleDrawerListener() {
+            override fun onDrawerClosed(drawerView: View) {
+                if (drawerView == navView) {
+                    activity.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, navView)
+                }
+            }
+
+            override fun onDrawerOpened(drawerView: View) {
+                if (drawerView == navView) {
+                    activity.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, navView)
+                }
+            }
+        }
+    }
+
     /**
      * Subscription for the number of manga per row.
      */
@@ -123,8 +141,6 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
     override fun onCreate(savedState: Bundle?) {
         super.onCreate(savedState)
         setHasOptionsMenu(true)
-        isFilterDownloaded = preferences.filterDownloaded().get() as Boolean
-        isFilterUnread = preferences.filterUnread().get() as Boolean
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedState: Bundle?): View? {
@@ -146,7 +162,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
         if (savedState != null) {
             activeCategory = savedState.getInt(CATEGORY_KEY)
             query = savedState.getString(QUERY_KEY)
-            presenter.searchSubject.onNext(query)
+            presenter.searchSubject.call(query)
             if (presenter.selectedMangas.isNotEmpty()) {
                 createActionModeIfNeeded()
             }
@@ -159,6 +175,25 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
                 .skip(1)
                 // Set again the adapter to recalculate the covers height
                 .subscribe { reattachAdapter() }
+
+
+        // Inflate and prepare drawer
+        navView = activity.drawer.inflate(R.layout.library_drawer) as LibraryNavigationView
+        activity.drawer.addView(navView)
+        activity.drawer.addDrawerListener(drawerListener)
+
+        navView.post {
+            if (isAdded && !activity.drawer.isDrawerOpen(navView))
+                activity.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, navView)
+        }
+
+        navView.onGroupClicked = { group ->
+            when (group) {
+                is LibraryNavigationView.FilterGroup -> onFilterChanged()
+                is LibraryNavigationView.SortGroup -> onSortChanged()
+                is LibraryNavigationView.DisplayGroup -> reattachAdapter()
+            }
+        }
     }
 
     override fun onResume() {
@@ -167,6 +202,8 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
     }
 
     override fun onDestroyView() {
+        activity.drawer.removeDrawerListener(drawerListener)
+        activity.drawer.removeView(navView)
         numColumnsSubscription?.unsubscribe()
         tabs.setupWithViewPager(null)
         tabs.visibility = View.GONE
@@ -182,9 +219,6 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
         inflater.inflate(R.menu.library, menu)
 
-        // Initialize search menu
-        val filterDownloadedItem = menu.findItem(R.id.action_filter_downloaded)
-        val filterUnreadItem = menu.findItem(R.id.action_filter_unread)
         val searchItem = menu.findItem(R.id.action_search)
         val searchView = searchItem.actionView as SearchView
 
@@ -194,8 +228,8 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
             searchView.clearFocus()
         }
 
-        filterDownloadedItem.isChecked = isFilterDownloaded
+        // Mutate the filter icon because it needs to be tinted and the resource is shared.
-        filterUnreadItem.isChecked = isFilterUnread
+        menu.findItem(R.id.action_filter).icon.mutate()
 
         searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String): Boolean {
@@ -211,35 +245,19 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
 
     }
 
+    override fun onPrepareOptionsMenu(menu: Menu) {
+        val filterItem = menu.findItem(R.id.action_filter)
+
+        // Tint icon if there's a filter active
+        val filterColor = if (navView.hasActiveFilters()) Color.rgb(255, 238, 7) else Color.WHITE
+        DrawableCompat.setTint(filterItem.icon, filterColor)
+    }
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
-            R.id.action_filter_unread -> {
+            R.id.action_filter -> {
-                // Change unread filter status.
+                activity.drawer.openDrawer(Gravity.END)
-                isFilterUnread = !isFilterUnread
-                // Update settings.
-                preferences.filterUnread().set(isFilterUnread)
-                // Apply filter.
-                onFilterCheckboxChanged()
             }
-            R.id.action_filter_downloaded -> {
-                // Change downloaded filter status.
-                isFilterDownloaded = !isFilterDownloaded
-                // Update settings.
-                preferences.filterDownloaded().set(isFilterDownloaded)
-                // Apply filter.
-                onFilterCheckboxChanged()
-            }
-            R.id.action_filter_empty -> {
-                // Remove filter status.
-                isFilterUnread = false
-                isFilterDownloaded = false
-                // Update settings.
-                preferences.filterUnread().set(isFilterUnread)
-                preferences.filterDownloaded().set(isFilterDownloaded)
-                // Apply filter
-                onFilterCheckboxChanged()
-            }
-            R.id.action_library_display_mode -> swapDisplayMode()
             R.id.action_update_library -> {
                 LibraryUpdateService.start(activity)
             }
@@ -254,19 +272,18 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
     }
 
     /**
-     * Applies filter change
+     * Called when a filter is changed.
      */
-    private fun onFilterCheckboxChanged() {
+    private fun onFilterChanged() {
-        presenter.resubscribeLibrary()
+        presenter.requestFilterUpdate()
         activity.supportInvalidateOptionsMenu()
     }
 
     /**
-     * Swap display mode
+     * Called when the sorting mode is changed.
      */
-    private fun swapDisplayMode() {
+    private fun onSortChanged() {
-        presenter.swapDisplayMode()
+        presenter.requestSortUpdate()
-        reattachAdapter()
     }
 
     /**
@@ -302,7 +319,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
 
         // Notify the subject the query has changed.
         if (isResumed) {
-            presenter.searchSubject.onNext(query)
+            presenter.searchSubject.call(query)
         }
     }
 
@@ -330,7 +347,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
         view_pager.post { if (isAdded) tabs.setScrollPosition(view_pager.currentItem, 0f, true) }
 
         // Send the manga map to child fragments after the adapter is updated.
-        presenter.libraryMangaSubject.onNext(LibraryMangaEvent(mangaMap))
+        presenter.libraryMangaSubject.call(LibraryMangaEvent(mangaMap))
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryNavigationView.kt

@@ -0,0 +1,191 @@
+package eu.kanade.tachiyomi.ui.library
+
+import android.content.Context
+import android.util.AttributeSet
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.MultiSort.Companion.SORT_ASC
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.MultiSort.Companion.SORT_DESC
+import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.MultiSort.Companion.SORT_NONE
+import uy.kohesive.injekt.injectLazy
+
+/**
+ * The navigation view shown in a drawer with the different options to show the library.
+ */
+class LibraryNavigationView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null)
+: ExtendedNavigationView(context, attrs) {
+
+    /**
+     * Preferences helper.
+     */
+    private val preferences: PreferencesHelper by injectLazy()
+
+    /**
+     * List of groups shown in the view.
+     */
+    private val groups = listOf(FilterGroup(), SortGroup(),  DisplayGroup())
+
+    /**
+     * Adapter instance.
+     */
+    private val adapter = Adapter(groups.map { it.createItems() }.flatten())
+
+    /**
+     * Click listener to notify the parent fragment when an item from a group is clicked.
+     */
+    var onGroupClicked: (Group) -> Unit = {}
+
+    init {
+        recycler.adapter = adapter
+
+        groups.forEach { it.initModels() }
+    }
+
+    /**
+     * Returns true if there's at least one filter from [FilterGroup] active.
+     */
+    fun hasActiveFilters(): Boolean {
+        return (groups[0] as FilterGroup).items.any { it.checked }
+    }
+
+    /**
+     * Adapter of the recycler view.
+     */
+    inner class Adapter(items: List<Item>) : ExtendedNavigationView.Adapter(items) {
+
+        override fun onItemClicked(item: Item) {
+            if (item is GroupedItem) {
+                item.group.onItemClicked(item)
+                onGroupClicked(item.group)
+            }
+        }
+        
+    }
+
+    /**
+     * Filters group (unread, downloaded, ...).
+     */
+    inner class FilterGroup : Group {
+
+        private val downloaded = Item.CheckboxGroup(R.string.action_filter_downloaded, this)
+
+        private val unread = Item.CheckboxGroup(R.string.action_filter_unread, this)
+
+        override val items = listOf(downloaded, unread)
+
+        override val header = Item.Header(R.string.action_filter)
+
+        override val footer = Item.Separator()
+
+        override fun initModels() {
+            downloaded.checked = preferences.filterDownloaded().getOrDefault()
+            unread.checked = preferences.filterUnread().getOrDefault()
+        }
+
+        override fun onItemClicked(item: Item) {
+            item as Item.CheckboxGroup
+            item.checked = !item.checked
+            when (item) {
+                downloaded -> preferences.filterDownloaded().set(item.checked)
+                unread -> preferences.filterUnread().set(item.checked)
+            }
+
+            adapter.notifyItemChanged(item)
+        }
+
+    }
+
+    /**
+     * Sorting group (alphabetically, by last read, ...) and ascending or descending.
+     */
+    inner class SortGroup : Group {
+
+        private val alphabetically = Item.MultiSort(R.string.action_sort_alpha, this)
+
+        private val lastRead = Item.MultiSort(R.string.action_sort_last_read, this)
+
+        private val lastUpdated = Item.MultiSort(R.string.action_sort_last_updated, this)
+
+        private val unread = Item.MultiSort(R.string.action_filter_unread, this)
+
+        override val items = listOf(alphabetically, lastRead, lastUpdated, unread)
+
+        override val header = Item.Header(R.string.action_sort)
+
+        override val footer = Item.Separator()
+
+        override fun initModels() {
+            val sorting = preferences.librarySortingMode().getOrDefault()
+            val order = if (preferences.librarySortingAscending().getOrDefault())
+                SORT_ASC else SORT_DESC
+
+            alphabetically.state = if (sorting == LibrarySort.ALPHA) order else SORT_NONE
+            lastRead.state = if (sorting == LibrarySort.LAST_READ) order else SORT_NONE
+            lastUpdated.state = if (sorting == LibrarySort.LAST_UPDATED) order else SORT_NONE
+            unread.state = if (sorting == LibrarySort.UNREAD) order else SORT_NONE
+        }
+
+        override fun onItemClicked(item: Item) {
+            item as Item.MultiStateGroup
+            val prevState = item.state
+
+            item.group.items.forEach { (it as Item.MultiStateGroup).state = SORT_NONE }
+            item.state = when (prevState) {
+                SORT_NONE -> SORT_ASC
+                SORT_ASC -> SORT_DESC
+                SORT_DESC -> SORT_ASC
+                else -> throw Exception("Unknown state")
+            }
+
+            preferences.librarySortingMode().set(when (item) {
+                alphabetically -> LibrarySort.ALPHA
+                lastRead -> LibrarySort.LAST_READ
+                lastUpdated -> LibrarySort.LAST_UPDATED
+                unread -> LibrarySort.UNREAD
+                else -> throw Exception("Unknown sorting")
+            })
+            preferences.librarySortingAscending().set(if (item.state == SORT_ASC) true else false)
+
+            item.group.items.forEach { adapter.notifyItemChanged(it) }
+        }
+
+    }
+
+    /**
+     * Display group, to show the library as a list or a grid.
+     */
+    inner class DisplayGroup : Group {
+
+        private val grid = Item.Radio(R.string.action_display_grid, this)
+
+        private val list = Item.Radio(R.string.action_display_list, this)
+
+        override val items = listOf(grid, list)
+
+        override val header = Item.Header(R.string.action_display)
+
+        override val footer = null
+
+        override fun initModels() {
+            val asList = preferences.libraryAsList().getOrDefault()
+            grid.checked = !asList
+            list.checked = asList
+        }
+
+        override fun onItemClicked(item: Item) {
+            item as Item.Radio
+            if (item.checked) return
+
+            item.group.items.forEach { (it as Item.Radio).checked = false }
+            item.checked = true
+
+            preferences.libraryAsList().set(if (item == list) true else false)
+
+            item.group.items.forEach { adapter.notifyItemChanged(it) }
+        }
+
+    }
+
+}

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -2,6 +2,9 @@ package eu.kanade.tachiyomi.ui.library
 
 import android.os.Bundle
 import android.util.Pair
+import com.hippo.unifile.UniFile
+import com.jakewharton.rxrelay.BehaviorRelay
+import com.jakewharton.rxrelay.PublishRelay
 import eu.kanade.tachiyomi.data.cache.CoverCache
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Category
@@ -12,11 +15,12 @@ import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.data.source.SourceManager
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
+import eu.kanade.tachiyomi.util.combineLatest
+import eu.kanade.tachiyomi.util.isNullOrUnsubscribed
 import rx.Observable
+import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
-import rx.subjects.BehaviorSubject
-import rx.subjects.PublishSubject
 import uy.kohesive.injekt.injectLazy
 import java.io.IOException
 import java.io.InputStream
@@ -27,6 +31,31 @@ import java.util.*
  */
 class LibraryPresenter : BasePresenter<LibraryFragment>() {
 
+    /**
+     * Database.
+     */
+    private val db: DatabaseHelper by injectLazy()
+
+    /**
+     * Preferences.
+     */
+    private val preferences: PreferencesHelper by injectLazy()
+
+    /**
+     * Cover cache.
+     */
+    private val coverCache: CoverCache by injectLazy()
+
+    /**
+     * Source manager.
+     */
+    private val sourceManager: SourceManager by injectLazy()
+
+    /**
+     * Download manager.
+     */
+    private val downloadManager: DownloadManager by injectLazy()
+
     /**
      * Categories of the library.
      */
@@ -40,61 +69,139 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
     /**
      * Search query of the library.
      */
-    val searchSubject: BehaviorSubject<String> = BehaviorSubject.create()
+    val searchSubject: BehaviorRelay<String> = BehaviorRelay.create()
 
     /**
      * Subject to notify the library's viewpager for updates.
      */
-    val libraryMangaSubject: BehaviorSubject<LibraryMangaEvent> = BehaviorSubject.create()
+    val libraryMangaSubject: BehaviorRelay<LibraryMangaEvent> = BehaviorRelay.create()
 
     /**
      * Subject to notify the UI of selection updates.
      */
-    val selectionSubject: PublishSubject<LibrarySelectionEvent> = PublishSubject.create()
+    val selectionSubject: PublishRelay<LibrarySelectionEvent> = PublishRelay.create()
 
     /**
-     * Database.
+     * Relay used to apply the UI filters to the last emission of the library.
      */
-    val db: DatabaseHelper by injectLazy()
+    private val filterTriggerRelay = BehaviorRelay.create(Unit)
 
     /**
-     * Preferences.
+     * Relay used to apply the selected sorting method to the last emission of the library.
      */
-    val preferences: PreferencesHelper by injectLazy()
+    private val sortTriggerRelay = BehaviorRelay.create(Unit)
 
     /**
-     * Cover cache.
+     * Library subscription.
      */
-    val coverCache: CoverCache by injectLazy()
+    private var librarySubscription: Subscription? = null
-
-    /**
-     * Source manager.
-     */
-    val sourceManager: SourceManager by injectLazy()
-
-    /**
-     * Download manager.
-     */
-    val downloadManager: DownloadManager by injectLazy()
-
-    companion object {
-        /**
-         * Id of the restartable that listens for library updates.
-         */
-        const val GET_LIBRARY = 1
-    }
 
     override fun onCreate(savedState: Bundle?) {
         super.onCreate(savedState)
+        subscribeLibrary()
+    }
 
-        restartableLatestCache(GET_LIBRARY,
+    /**
-                { getLibraryObservable() },
+     * Subscribes to library if needed.
-                { view, pair -> view.onNextLibraryUpdate(pair.first, pair.second) })
+     */
+    fun subscribeLibrary() {
+        if (librarySubscription.isNullOrUnsubscribed()) {
+            librarySubscription = getLibraryObservable()
+                    .combineLatest(filterTriggerRelay.observeOn(Schedulers.io()),
+                            { lib, tick -> Pair(lib.first, applyFilters(lib.second)) })
+                    .combineLatest(sortTriggerRelay.observeOn(Schedulers.io()),
+                            { lib, tick -> Pair(lib.first, applySort(lib.second)) })
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribeLatestCache({ view, pair ->
+                        view.onNextLibraryUpdate(pair.first, pair.second)
+                    })
+        }
+    }
 
-        if (savedState == null) {
+    /**
-            start(GET_LIBRARY)
+     * Applies library filters to the given map of manga.
+     *
+     * @param map the map to filter.
+     */
+    private fun applyFilters(map: Map<Int, List<Manga>>): Map<Int, List<Manga>> {
+        // Cached list of downloaded manga directories given a source id.
+        val mangaDirectories = mutableMapOf<Int, Array<UniFile>>()
+
+        // Cached list of downloaded chapter directories for a manga.
+        val chapterDirectories = mutableMapOf<Long, Boolean>()
+
+        val filterDownloaded = preferences.filterDownloaded().getOrDefault()
+
+        val filterUnread = preferences.filterUnread().getOrDefault()
+
+        val filterFn: (Manga) -> Boolean = f@ { manga ->
+            // Filter out manga without source.
+            val source = sourceManager.get(manga.source) ?: return@f false
+
+            // Filter when there isn't unread chapters.
+            if (filterUnread && manga.unread == 0) {
+                return@f false
+            }
+
+            // Filter when the download directory doesn't exist or is null.
+            if (filterDownloaded) {
+                val mangaDirs = mangaDirectories.getOrPut(source.id) {
+                    downloadManager.findSourceDir(source)?.listFiles() ?: emptyArray()
+                }
+
+                val mangaDirName = downloadManager.getMangaDirName(manga)
+                val mangaDir = mangaDirs.find { it.name == mangaDirName } ?: return@f false
+
+                val hasDirs = chapterDirectories.getOrPut(manga.id!!) {
+                    (mangaDir.listFiles() ?: emptyArray()).isNotEmpty()
+                }
+                if (!hasDirs) {
+                    return@f false
+                }
+            }
+            true
         }
 
+        return map.mapValues { entry -> entry.value.filter(filterFn) }
+    }
+
+    /**
+     * Applies library sorting to the given map of manga.
+     *
+     * @param map the map to sort.
+     */
+    private fun applySort(map: Map<Int, List<Manga>>): Map<Int, List<Manga>> {
+        val sortingMode = preferences.librarySortingMode().getOrDefault()
+
+        // TODO lazy initialization in kotlin 1.1
+        var lastReadManga: Map<Long, Int>? = null
+        if (sortingMode == LibrarySort.LAST_READ) {
+            var counter = 0
+            lastReadManga = db.getLastReadManga().executeAsBlocking()
+                    .associate { it.id!! to counter++ }
+        }
+
+        val sortFn: (Manga, Manga) -> Int = { manga1, manga2 ->
+            when (sortingMode) {
+                LibrarySort.ALPHA -> manga1.title.compareTo(manga2.title)
+                LibrarySort.LAST_READ -> {
+                    // Get index of manga, set equal to list if size unknown.
+                    val manga1LastRead = lastReadManga!![manga1.id!!] ?: lastReadManga!!.size
+                    val manga2LastRead = lastReadManga!![manga2.id!!] ?: lastReadManga!!.size
+                    manga1LastRead.compareTo(manga2LastRead)
+                }
+                LibrarySort.LAST_UPDATED -> manga2.last_update.compareTo(manga1.last_update)
+                LibrarySort.UNREAD -> manga1.unread.compareTo(manga2.unread)
+                else -> throw Exception("Unknown sorting mode")
+            }
+        }
+
+        val comparator = if (preferences.librarySortingAscending().getOrDefault())
+            Comparator(sortFn)
+        else
+            Collections.reverseOrder(sortFn)
+
+        return map.mapValues { entry -> entry.value.sortedWith(comparator) }
     }
 
     /**
@@ -102,7 +209,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
      *
      * @return an observable of the categories and its manga.
      */
-    fun getLibraryObservable(): Observable<Pair<List<Category>, Map<Int, List<Manga>>>> {
+    private fun getLibraryObservable(): Observable<Pair<List<Category>, Map<Int, List<Manga>>>> {
         return Observable.combineLatest(getCategoriesObservable(), getLibraryMangasObservable(),
                 { dbCategories, libraryManga ->
                     val categories = if (libraryManga.containsKey(0))
@@ -113,7 +220,6 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
                     this.categories = categories
                     Pair(categories, libraryManga)
                 })
-                .observeOn(AndroidSchedulers.mainThread())
     }
 
     /**
@@ -121,7 +227,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
      *
      * @return an observable of the categories.
      */
-    fun getCategoriesObservable(): Observable<List<Category>> {
+    private fun getCategoriesObservable(): Observable<List<Category>> {
         return db.getCategories().asRxObservable()
     }
 
@@ -131,76 +237,23 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
      * @return an observable containing a map with the category id as key and a list of manga as the
      * value.
      */
-    fun getLibraryMangasObservable(): Observable<Map<Int, List<Manga>>> {
+    private fun getLibraryMangasObservable(): Observable<Map<Int, List<Manga>>> {
         return db.getLibraryMangas().asRxObservable()
-                .flatMap { mangas ->
+                .map { list -> list.groupBy { it.category } }
-                    Observable.from(mangas)
-                            // Filter library by options
-                            .filter { filterManga(it) }
-                            .groupBy { it.category }
-                            .flatMap { group -> group.toList().map { Pair(group.key, it) } }
-                            .toMap({ it.first }, { it.second })
-                }
     }
 
     /**
-     * Resubscribes to library if needed.
+     * Requests the library to be filtered.
      */
-    fun subscribeLibrary() {
+    fun requestFilterUpdate() {
-        if (isUnsubscribed(GET_LIBRARY)) {
+        filterTriggerRelay.call(Unit)
-            start(GET_LIBRARY)
-        }
     }
 
     /**
-     * Resubscribes to library.
+     * Requests the library to be sorted.
      */
-    fun resubscribeLibrary() {
+    fun requestSortUpdate() {
-        start(GET_LIBRARY)
+        sortTriggerRelay.call(Unit)
-    }
-
-    /**
-     * Filters an entry of the library.
-     *
-     * @param manga a favorite manga from the database.
-     * @return true if the entry is included, false otherwise.
-     */
-    fun filterManga(manga: Manga): Boolean {
-        // Filter out manga without source
-        val source = sourceManager.get(manga.source) ?: return false
-
-        val prefFilterDownloaded = preferences.filterDownloaded().getOrDefault()
-        val prefFilterUnread = preferences.filterUnread().getOrDefault()
-
-        // Check if filter option is selected
-        if (prefFilterDownloaded || prefFilterUnread) {
-
-            // Does it have downloaded chapters.
-            var hasDownloaded = false
-            var hasUnread = false
-
-            if (prefFilterUnread) {
-                // Does it have unread chapters.
-                hasUnread = manga.unread > 0
-            }
-
-            if (prefFilterDownloaded) {
-                val mangaDir = downloadManager.findMangaDir(source, manga)
-
-                if (mangaDir != null) {
-                    hasDownloaded = mangaDir.listFiles()?.any { it.isDirectory } ?: false
-                }
-            }
-
-            // Return correct filter status
-            if (prefFilterDownloaded && prefFilterUnread) {
-                return (hasDownloaded && hasUnread)
-            } else {
-                return (hasDownloaded || hasUnread)
-            }
-        } else {
-            return true
-        }
     }
 
     /**
@@ -208,7 +261,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
      */
     fun onOpenManga() {
         // Avoid further db updates for the library when it's not needed
-        stop(GET_LIBRARY)
+        librarySubscription?.let { remove(it) }
     }
 
     /**
@@ -220,10 +273,10 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
     fun setSelection(manga: Manga, selected: Boolean) {
         if (selected) {
             selectedMangas.add(manga)
-            selectionSubject.onNext(LibrarySelectionEvent.Selected(manga))
+            selectionSubject.call(LibrarySelectionEvent.Selected(manga))
         } else {
             selectedMangas.remove(manga)
-            selectionSubject.onNext(LibrarySelectionEvent.Unselected(manga))
+            selectionSubject.call(LibrarySelectionEvent.Unselected(manga))
         }
     }
 
@@ -232,7 +285,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
      */
     fun clearSelections() {
         selectedMangas.clear()
-        selectionSubject.onNext(LibrarySelectionEvent.Cleared())
+        selectionSubject.call(LibrarySelectionEvent.Cleared())
     }
 
     /**
@@ -296,12 +349,4 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
         return false
     }
 
-    /**
-     * Changes the active display mode.
-     */
-    fun swapDisplayMode() {
-        val displayAsList = preferences.libraryAsList().getOrDefault()
-        preferences.libraryAsList().set(!displayAsList)
-    }
-
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibrarySort.kt

@@ -0,0 +1,10 @@
+package eu.kanade.tachiyomi.ui.library
+
+object LibrarySort {
+
+    const val ALPHA = 0
+    const val LAST_READ = 1
+    const val LAST_UPDATED = 2
+    const val UNREAD = 3
+
+}

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -94,7 +94,9 @@ class MainActivity : BaseActivity() {
     override fun onBackPressed() {
         val fragment = supportFragmentManager.findFragmentById(R.id.frame_container)
         if (fragment != null && fragment.tag.toInt() != startScreenId) {
-            setSelectedDrawerItem(startScreenId)
+            if (resumed) {
+                setSelectedDrawerItem(startScreenId)
+            }
         } else {
             super.onBackPressed()
         }
@@ -110,6 +112,8 @@ class MainActivity : BaseActivity() {
             } else if (resultCode and SettingsActivity.FLAG_THEME_CHANGED != 0) {
                 // Delay activity recreation to avoid fragment leaks.
                 nav_view.post { recreate() }
+            } else if (resultCode and SettingsActivity.FLAG_LANG_CHANGED != 0) {
+                nav_view.post { recreate() }
             }
         } else {
             super.onActivityResult(requestCode, resultCode, data)

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.kt

@@ -13,6 +13,7 @@ import eu.kanade.tachiyomi.ui.manga.chapter.ChaptersFragment
 import eu.kanade.tachiyomi.ui.manga.info.MangaInfoFragment
 import eu.kanade.tachiyomi.ui.manga.myanimelist.MyAnimeListFragment
 import eu.kanade.tachiyomi.util.SharedData
+import eu.kanade.tachiyomi.util.toast
 import kotlinx.android.synthetic.main.activity_manga.*
 import kotlinx.android.synthetic.main.toolbar.*
 import nucleus.factory.RequiresPresenter
@@ -50,12 +51,19 @@ class MangaActivity : BaseRxActivity<MangaPresenter>() {
 
         val fromLauncher = intent.getBooleanExtra(FROM_LAUNCHER_EXTRA, false)
 
-        //Remove any current manga if we are launching from launcher
+        // Remove any current manga if we are launching from launcher
-        if(fromLauncher) SharedData.remove(MangaEvent::class.java)
+        if (fromLauncher) SharedData.remove(MangaEvent::class.java)
 
         presenter.setMangaEvent(SharedData.getOrPut(MangaEvent::class.java) {
             val id = intent.getLongExtra(MANGA_EXTRA, 0)
-            MangaEvent(presenter.db.getManga(id).executeAsBlocking()!!)
+            val dbManga = presenter.db.getManga(id).executeAsBlocking()
+            if (dbManga != null) {
+                MangaEvent(dbManga)
+            } else {
+                toast(R.string.manga_not_in_db)
+                finish()
+                return
+            }
         })
 
         setupToolbar(toolbar)

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt

@@ -394,7 +394,8 @@ class ChaptersFragment : BaseRxFragment<ChaptersPresenter>(), ActionMode.Callbac
     }
 
     fun dismissDeletingDialog() {
-        (childFragmentManager.findFragmentByTag(DeletingChaptersDialog.TAG) as? DialogFragment)?.dismiss()
+        (childFragmentManager.findFragmentByTag(DeletingChaptersDialog.TAG) as? DialogFragment)
+                ?.dismissAllowingStateLoss()
     }
 
     override fun onListItemClick(position: Int): Boolean {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -189,7 +189,7 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
                 KeyEvent.KEYCODE_VOLUME_DOWN -> {
                     if (volumeKeysEnabled) {
                         if (event.action == KeyEvent.ACTION_UP) {
-                            viewer?.moveToNext()
+                            viewer?.moveDown()
                         }
                         return true
                     }
@@ -197,7 +197,7 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
                 KeyEvent.KEYCODE_VOLUME_UP -> {
                     if (volumeKeysEnabled) {
                         if (event.action == KeyEvent.ACTION_UP) {
-                            viewer?.moveToPrevious()
+                            viewer?.moveUp()
                         }
                         return true
                     }
@@ -210,12 +210,15 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
     override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean {
         if (!isFinishing) {
             when (keyCode) {
-                KeyEvent.KEYCODE_DPAD_RIGHT -> viewer?.moveToNext()
+                KeyEvent.KEYCODE_DPAD_RIGHT -> viewer?.moveRight()
-                KeyEvent.KEYCODE_DPAD_LEFT -> viewer?.moveToPrevious()
+                KeyEvent.KEYCODE_DPAD_LEFT -> viewer?.moveLeft()
+                KeyEvent.KEYCODE_DPAD_DOWN -> viewer?.moveDown()
+                KeyEvent.KEYCODE_DPAD_UP -> viewer?.moveUp()
                 KeyEvent.KEYCODE_MENU -> toggleMenu()
+                else -> return super.onKeyUp(keyCode, event)
             }
         }
-        return super.onKeyUp(keyCode, event)
+        return true
     }
 
     fun onChapterError(error: Throwable) {
@@ -224,14 +227,14 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         toast(error.message)
     }
 
-    fun onLongPress(page: Page) {
+    fun onLongClick(page: Page) {
         MaterialDialog.Builder(this)
                 .title(getString(R.string.options))
                 .items(R.array.reader_image_options)
                 .itemsIds(R.array.reader_image_options_values)
                 .itemsCallback { materialDialog, view, i, charSequence ->
                     when (i) {
-                        0 -> presenter.setCover(page)
+                        0 -> setImageAsCover(page)
                         1 -> shareImage(page)
                         2 -> presenter.savePage(page)
                     }
@@ -313,14 +316,14 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         val mangaViewer = if (manga.viewer == 0) preferences.defaultViewer() else manga.viewer
 
         // Try to reuse the viewer using its tag
-        var fragment: BaseReader? = supportFragmentManager.findFragmentByTag(manga.viewer.toString()) as? BaseReader
+        var fragment = supportFragmentManager.findFragmentByTag(manga.viewer.toString()) as? BaseReader
         if (fragment == null) {
             // Create a new viewer
-            when (mangaViewer) {
+            fragment = when (mangaViewer) {
-                RIGHT_TO_LEFT -> fragment = RightToLeftReader()
+                RIGHT_TO_LEFT -> RightToLeftReader()
-                VERTICAL -> fragment = VerticalReader()
+                VERTICAL -> VerticalReader()
-                WEBTOON -> fragment = WebtoonReader()
+                WEBTOON -> WebtoonReader()
-                else -> fragment = LeftToRightReader()
+                else -> LeftToRightReader()
             }
 
             supportFragmentManager.beginTransaction().replace(R.id.reader, fragment, manga.viewer.toString()).commit()
@@ -469,23 +472,6 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         }
     }
 
-    /**
-     * Start a share intent that lets user share image
-     *
-     * @param page page object containing image information.
-     */
-    fun shareImage(page: Page) {
-        if (page.status != Page.READY)
-            return
-
-        val intent = Intent(Intent.ACTION_SEND).apply {
-            putExtra(Intent.EXTRA_STREAM, page.uri)
-            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
-            type = "image/*"
-        }
-        startActivity(Intent.createChooser(intent, getString(R.string.action_share)))
-    }
-
     /**
      * Sets the brightness of the screen. Range is [-75, 100].
      * From -75 to -1 a semi-transparent black view is shown at the top with the minimum brightness.
@@ -570,4 +556,39 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         }
     }
 
+    /**
+     * Start a share intent that lets user share image
+     *
+     * @param page page object containing image information.
+     */
+    private fun shareImage(page: Page) {
+        if (page.status != Page.READY)
+            return
+
+        val intent = Intent(Intent.ACTION_SEND).apply {
+            putExtra(Intent.EXTRA_STREAM, page.uri)
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
+            type = "image/*"
+        }
+        startActivity(Intent.createChooser(intent, getString(R.string.action_share)))
+    }
+
+    /**
+     * Sets the given page as the cover of the manga.
+     *
+     * @param page the page containing the image to set as cover.
+     */
+    private fun setImageAsCover(page: Page) {
+        if (page.status != Page.READY)
+            return
+
+        MaterialDialog.Builder(this)
+                .content(getString(R.string.confirm_set_image_as_cover))
+                .positiveText(android.R.string.yes)
+                .negativeText(android.R.string.no)
+                .onPositive { dialog, which -> presenter.setImageAsCover(page) }
+                .show()
+
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -523,19 +523,13 @@ class ReaderPresenter : BasePresenter<ReaderActivity>() {
     /**
      * Update cover with page file.
      */
-    internal fun setCover(page: Page) {
+    internal fun setImageAsCover(page: Page) {
-        if (page.status != Page.READY)
-            return
-
         try {
+            val thumbUrl = manga.thumbnail_url ?: throw Exception("Image url not found")
             if (manga.favorite) {
-                if (manga.thumbnail_url != null) {
+                val input = context.contentResolver.openInputStream(page.uri)
-                    val input = context.contentResolver.openInputStream(page.uri)
+                coverCache.copyToCache(thumbUrl, input)
-                    coverCache.copyToCache(manga.thumbnail_url!!, input)
+                context.toast(R.string.cover_updated)
-                    context.toast(R.string.cover_updated)
-                } else {
-                    throw Exception("Image url not found")
-                }
             } else {
                 context.toast(R.string.notification_first_add_to_library)
             }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/notification/ImageNotificationReceiver.kt

@@ -4,12 +4,11 @@ import android.app.PendingIntent
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.net.Uri
 import android.support.v4.content.FileProvider
 import eu.kanade.tachiyomi.BuildConfig
-import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.util.notificationManager
 import java.io.File
+import eu.kanade.tachiyomi.Constants.NOTIFICATION_DOWNLOAD_IMAGE_ID as defaultNotification
 
 /**
  * The BroadcastReceiver of [ImageNotifier]
@@ -18,21 +17,16 @@ import java.io.File
 class ImageNotificationReceiver : BroadcastReceiver() {
     override fun onReceive(context: Context, intent: Intent) {
         when (intent.action) {
-            ACTION_SHARE_IMAGE -> {
-                shareImage(context, intent.getStringExtra(EXTRA_FILE_LOCATION))
-                context.notificationManager.cancel(intent.getIntExtra(NOTIFICATION_ID, 5))
-            }
-            ACTION_SHOW_IMAGE ->
-                showImage(context, intent.getStringExtra(EXTRA_FILE_LOCATION))
             ACTION_DELETE_IMAGE -> {
                 deleteImage(intent.getStringExtra(EXTRA_FILE_LOCATION))
-                context.notificationManager.cancel(intent.getIntExtra(NOTIFICATION_ID, 5))
+                context.notificationManager.cancel(intent.getIntExtra(NOTIFICATION_ID, defaultNotification))
             }
         }
     }
 
     /**
      * Called to delete image
+     *
      * @param path path of file
      */
     private fun deleteImage(path: String) {
@@ -40,60 +34,42 @@ class ImageNotificationReceiver : BroadcastReceiver() {
         if (file.exists()) file.delete()
     }
 
-    /**
-     * Called to start share intent to share image
-     * @param context context of application
-     * @param path path of file
-     */
-    private fun shareImage(context: Context, path: String) {
-        val intent = Intent(Intent.ACTION_SEND).apply {
-            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_MULTIPLE_TASK
-            putExtra(Intent.EXTRA_STREAM, Uri.parse(path))
-            type = "image/*"
-        }
-        context.startActivity(Intent.createChooser(intent, context.getString(R.string.action_share)))
-    }
-
-    /**
-     * Called to show image in gallery application
-     * @param context context of application
-     * @param path path of file
-     */
-    private fun showImage(context: Context, path: String) {
-        val intent = Intent(Intent.ACTION_VIEW).apply {
-            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_MULTIPLE_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
-            val uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", File(path))
-            setDataAndType(uri, "image/*")
-        }
-        context.startActivity(intent)
-    }
-
     companion object {
-        private const val ACTION_SHARE_IMAGE = "eu.kanade.SHARE_IMAGE"
-
-        private const val ACTION_SHOW_IMAGE = "eu.kanade.SHOW_IMAGE"
-
         private const val ACTION_DELETE_IMAGE = "eu.kanade.DELETE_IMAGE"
 
         private const val EXTRA_FILE_LOCATION = "file_location"
 
         private const val NOTIFICATION_ID = "notification_id"
 
-        internal fun shareImageIntent(context: Context, path: String, notificationId: Int): PendingIntent {
+        /**
-            val intent = Intent(context, ImageNotificationReceiver::class.java).apply {
+         * Called to start share intent to share image
-                action = ACTION_SHARE_IMAGE
+         *
-                putExtra(EXTRA_FILE_LOCATION, path)
+         * @param context context of application
-                putExtra(NOTIFICATION_ID, notificationId)
+         * @param path path of file
+         */
+        internal fun shareImageIntent(context: Context, path: String): PendingIntent {
+            val intent = Intent(Intent.ACTION_SEND).apply {
+                val uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", File(path))
+                putExtra(Intent.EXTRA_STREAM, uri)
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
+                type = "image/*"
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
         }
 
+        /**
+         * Called to show image in gallery application
+         *
+         * @param context context of application
+         * @param path path of file
+         */
         internal fun showImageIntent(context: Context, path: String): PendingIntent {
-            val intent = Intent(context, ImageNotificationReceiver::class.java).apply {
+            val intent = Intent(Intent.ACTION_VIEW).apply {
-                action = ACTION_SHOW_IMAGE
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
-                putExtra(EXTRA_FILE_LOCATION, path)
+                val uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", File(path))
+                setDataAndType(uri, "image/*")
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
         }
 
         internal fun deleteImageIntent(context: Context, path: String, notificationId: Int): PendingIntent {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/notification/ImageNotifier.kt

@@ -62,7 +62,7 @@ class ImageNotifier(private val context: Context) {
             // Share action
             addAction(R.drawable.ic_share_grey_24dp,
                     context.getString(R.string.action_share),
-                    ImageNotificationReceiver.shareImageIntent(context, file.absolutePath, notificationId))
+                    ImageNotificationReceiver.shareImageIntent(context, file.absolutePath))
             // Delete action
             addAction(R.drawable.ic_delete_grey_24dp,
                     context.getString(R.string.action_delete),

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/base/BaseReader.kt

@@ -189,14 +189,38 @@ abstract class BaseReader : BaseFragment() {
     abstract fun onChapterAppended(chapter: ReaderChapter)
 
     /**
-     * Moves pages forward. Implementations decide how to move (by a page, by some distance...).
+     * Moves pages to right. Implementations decide how to move (by a page, by some distance...).
      */
-    abstract fun moveToNext()
+    abstract fun moveRight()
 
     /**
-     * Moves pages backward. Implementations decide how to move (by a page, by some distance...).
+     * Moves pages to left. Implementations decide how to move (by a page, by some distance...).
      */
-    abstract fun moveToPrevious()
+    abstract fun moveLeft()
+
+    /**
+     * Moves pages down. Implementations decide how to move (by a page, by some distance...).
+     */
+    open fun moveDown() {
+        moveRight()
+    }
+
+    /**
+     * Moves pages up. Implementations decide how to move (by a page, by some distance...).
+     */
+    open fun moveUp() {
+        moveLeft()
+    }
+
+    /**
+     * Method the implementations can call to show a menu with options for the given page.
+     */
+    fun onLongClick(page: Page?): Boolean {
+        if (isAdded && page != null) {
+            readerActivity.onLongClick(page)
+        }
+        return true
+    }
 
     /**
      * Sets the active decoder class.

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PageView.kt

@@ -71,6 +71,7 @@ class PageView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
             setBitmapDecoderClass(reader.bitmapDecoderClass)
             setVerticalScrollingParent(reader is VerticalReader)
             setOnTouchListener { v, motionEvent -> reader.gestureDetector.onTouchEvent(motionEvent) }
+            setOnLongClickListener { reader.onLongClick(page) }
             setOnImageEventListener(object : SubsamplingScaleImageView.DefaultOnImageEventListener() {
                 override fun onReady() {
                     onImageDecoded(reader)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerReader.kt

@@ -66,7 +66,7 @@ abstract class PagerReader : BaseReader() {
     /**
      * Gesture detector for touch events.
      */
-    val gestureDetector by lazy { createGestureDetector() }
+    val gestureDetector by lazy { GestureDetector(context, ImageGestureListener()) }
 
     /**
      * Subscriptions for reader settings.
@@ -166,37 +166,24 @@ abstract class PagerReader : BaseReader() {
     }
 
     /**
-     * Creates the gesture detector for the pager.
+     * Gesture detector for Subsampling Scale Image View.
-     *
-     * @return a gesture detector.
      */
-    protected fun createGestureDetector(): GestureDetector {
+    inner class ImageGestureListener : GestureDetector.SimpleOnGestureListener() {
-        return GestureDetector(activity, object : GestureDetector.SimpleOnGestureListener() {
-            override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
-                if (isAdded) {
-                    val positionX = e.x
 
-                    if (positionX < pager.width * LEFT_REGION) {
+        override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
-                        if (tappingEnabled) onLeftSideTap()
+            if (isAdded) {
-                    } else if (positionX > pager.width * RIGHT_REGION) {
+                val positionX = e.x
-                        if (tappingEnabled) onRightSideTap()
-                    } else {
-                        readerActivity.toggleMenu()
-                    }
-                }
-                return true
-            }
 
-            override fun onLongPress(e: MotionEvent?) {
+                if (positionX < pager.width * LEFT_REGION) {
-                if (isAdded) {
+                    if (tappingEnabled) moveLeft()
-                    val page = adapter.pages.getOrNull(pager.currentItem)
+                } else if (positionX > pager.width * RIGHT_REGION) {
-                    if (page != null)
+                    if (tappingEnabled) moveRight()
-                        readerActivity.onLongPress(page)
+                } else {
-                    else
+                    readerActivity.toggleMenu()
-                        context.toast(getString(R.string.unknown_error))
                 }
             }
-        })
+            return true
+        }
     }
 
     /**
@@ -258,23 +245,23 @@ abstract class PagerReader : BaseReader() {
     }
 
     /**
-     * Called when the left side of the screen was clicked.
+     * Moves a page to the right.
      */
-    protected open fun onLeftSideTap() {
+    override fun moveRight() {
-        moveToPrevious()
+        moveToNext()
     }
 
     /**
-     * Called when the right side of the screen was clicked.
+     * Moves a page to the left.
      */
-    protected open fun onRightSideTap() {
+    override fun moveLeft() {
-        moveToNext()
+        moveToPrevious()
     }
 
     /**
      * Moves to the next page or requests the next chapter if it's the last one.
      */
-    override fun moveToNext() {
+    protected fun moveToNext() {
         if (pager.currentItem != pager.adapter.count - 1) {
             pager.setCurrentItem(pager.currentItem + 1, transitions)
         } else {
@@ -285,7 +272,7 @@ abstract class PagerReader : BaseReader() {
     /**
      * Moves to the previous page or requests the previous chapter if it's the first one.
      */
-    override fun moveToPrevious() {
+    protected fun moveToPrevious() {
         if (pager.currentItem != 0) {
             pager.setCurrentItem(pager.currentItem - 1, transitions)
         } else {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/horizontal/RightToLeftReader.kt

@@ -19,11 +19,31 @@ class RightToLeftReader : PagerReader() {
         }
     }
 
-    override fun onLeftSideTap() {
+    /**
+     * Moves a page to the right.
+     */
+    override fun moveRight() {
+        moveToPrevious()
+    }
+
+    /**
+     * Moves a page to the left.
+     */
+    override fun moveLeft() {
         moveToNext()
     }
 
-    override fun onRightSideTap() {
+    /**
+     * Moves a page down.
+     */
+    override fun moveDown() {
+        moveToNext()
+    }
+
+    /**
+     * Moves a page up.
+     */
+    override fun moveUp() {
         moveToPrevious()
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonAdapter.kt

@@ -22,7 +22,7 @@ class WebtoonAdapter(val fragment: WebtoonReader) : RecyclerView.Adapter<Webtoon
     /**
      * Touch listener for images in holders.
      */
-    val touchListener = View.OnTouchListener { v, ev -> fragment.gestureDetector.onTouchEvent(ev) }
+    val touchListener = View.OnTouchListener { v, ev -> fragment.imageGestureDetector.onTouchEvent(ev) }
 
     /**
      * Returns the number of pages.

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonHolder.kt

@@ -64,6 +64,7 @@ class WebtoonHolder(private val view: View, private val adapter: WebtoonAdapter)
             setBitmapDecoderClass(webtoonReader.bitmapDecoderClass)
             setVerticalScrollingParent(true)
             setOnTouchListener(adapter.touchListener)
+            setOnLongClickListener { webtoonReader.onLongClick(page) }
             setOnImageEventListener(object : SubsamplingScaleImageView.DefaultOnImageEventListener() {
                 override fun onReady() {
                     onImageDecoded()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonReader.kt

@@ -3,14 +3,11 @@ package eu.kanade.tachiyomi.ui.reader.viewer.webtoon
 import android.os.Bundle
 import android.support.v7.widget.RecyclerView
 import android.view.*
-import android.view.GestureDetector.SimpleOnGestureListener
 import android.view.ViewGroup.LayoutParams.MATCH_PARENT
 import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
-import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.source.model.Page
 import eu.kanade.tachiyomi.ui.reader.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.viewer.base.BaseReader
-import eu.kanade.tachiyomi.util.toast
 import eu.kanade.tachiyomi.widget.PreCachingLayoutManager
 import rx.subscriptions.CompositeSubscription
 
@@ -55,9 +52,9 @@ class WebtoonReader : BaseReader() {
         private set
 
     /**
-     * Gesture detector for touch events.
+     * Gesture detector for image touch events.
      */
-    val gestureDetector by lazy { createGestureDetector() }
+    val imageGestureDetector by lazy { GestureDetector(context, ImageGestureListener()) }
 
     /**
      * Subscriptions used while the view exists.
@@ -122,39 +119,24 @@ class WebtoonReader : BaseReader() {
     }
 
     /**
-     * Creates the gesture detector for the reader.
+     * Gesture detector for Subsampling Scale Image View.
-     *
-     * @return a gesture detector.
      */
-    protected fun createGestureDetector(): GestureDetector {
+    inner class ImageGestureListener : GestureDetector.SimpleOnGestureListener() {
-        return GestureDetector(context, object : SimpleOnGestureListener() {
-            override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
-                if (isAdded) {
-                    val positionX = e.x
 
-                    if (positionX < recycler.width * LEFT_REGION) {
+        override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
-                        if (tappingEnabled) moveToPrevious()
+            if (isAdded) {
-                    } else if (positionX > recycler.width * RIGHT_REGION) {
+                val positionX = e.x
-                        if (tappingEnabled) moveToNext()
-                    } else {
-                        readerActivity.toggleMenu()
-                    }
-                }
-                return true
-            }
 
-            override fun onLongPress(e: MotionEvent) {
+                if (positionX < recycler.width * LEFT_REGION) {
-                if (isAdded) {
+                    if (tappingEnabled) moveLeft()
-                    val child = recycler.findChildViewUnder(e.rawX, e.rawY)
+                } else if (positionX > recycler.width * RIGHT_REGION) {
-                    val position = recycler.getChildAdapterPosition(child)
+                    if (tappingEnabled) moveRight()
-                    val page = adapter.pages?.getOrNull(position)
+                } else {
-                    if (page != null)
+                    readerActivity.toggleMenu()
-                        readerActivity.onLongPress(page)
-                    else
-                        context.toast(getString(R.string.unknown_error))
                 }
             }
-        })
+            return true
+        }
     }
 
     /**
@@ -205,14 +187,14 @@ class WebtoonReader : BaseReader() {
     /**
      * Moves to the next page or requests the next chapter if it's the last one.
      */
-    override fun moveToNext() {
+    override fun moveRight() {
         recycler.smoothScrollBy(0, scrollDistance)
     }
 
     /**
      * Moves to the previous page or requests the previous chapter if it's the first one.
      */
-    override fun moveToPrevious() {
+    override fun moveLeft() {
         recycler.smoothScrollBy(0, -scrollDistance)
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/recent_updates/RecentChaptersPresenter.kt

@@ -43,43 +43,17 @@ class RecentChaptersPresenter : BasePresenter<RecentChaptersFragment>() {
      */
     private var chapters: List<RecentChapter>? = null
 
-    /**
-     * The id of the restartable.
-     */
-    val GET_RECENT_CHAPTERS = 1
-
-    /**
-     * The id of the restartable.
-     */
-    val CHAPTER_STATUS_CHANGES = 2
-
     override fun onCreate(savedState: Bundle?) {
         super.onCreate(savedState)
 
-        // Used to get recent chapters
+        getRecentChaptersObservable()
-        restartableLatestCache(GET_RECENT_CHAPTERS,
+                .observeOn(AndroidSchedulers.mainThread())
-                { getRecentChaptersObservable() },
+                .subscribeLatestCache(RecentChaptersFragment::onNextRecentChapters)
-                { view, chapters ->
-                    // Update adapter to show recent manga's
-                    view.onNextRecentChapters(chapters)
-                }
-        )
 
-        // Used to update download status
+        getChapterStatusObservable()
-        restartableLatestCache(CHAPTER_STATUS_CHANGES,
+                .subscribeLatestCache(RecentChaptersFragment::onChapterStatusChange,
-                { getChapterStatusObservable() },
+                        { view, error -> Timber.e(error) })
-                { view, download ->
-                    // Set chapter status
-                    view.onChapterStatusChange(download)
-                },
-                { view, error -> Timber.e(error) }
-        )
 
-        if (savedState == null) {
-            // Start fetching recent chapters
-            start(GET_RECENT_CHAPTERS)
-            start(CHAPTER_STATUS_CHANGES)
-        }
     }
 
     /**
@@ -119,7 +93,6 @@ class RecentChaptersPresenter : BasePresenter<RecentChaptersFragment>() {
                         }
                     }
                 }
-                .observeOn(AndroidSchedulers.mainThread())
     }
 
     /**
@@ -156,14 +129,29 @@ class RecentChaptersPresenter : BasePresenter<RecentChaptersFragment>() {
      * @param chapters the list of chapter from the database.
      */
     private fun setDownloadedChapters(chapters: List<RecentChapter>) {
-        val cachedDirs = mutableMapOf<Long, UniFile?>()
+        // Cached list of downloaded manga directories.
+        val mangaDirectories = mutableMapOf<Int, Array<UniFile>>()
 
-        chapters.forEach { chapter ->
+        // Cached list of downloaded chapter directories for a manga.
+        val chapterDirectories = mutableMapOf<Long, Array<UniFile>>()
+
+        for (chapter in chapters) {
             val manga = chapter.manga
-            val mangaDir = cachedDirs.getOrPut(manga.id!!)
+            val source = sourceManager.get(manga.source) ?: continue
-                    { downloadManager.findMangaDir(sourceManager.get(manga.source)!!, manga) }
 
-            if (mangaDir?.findFile(downloadManager.getChapterDirName(chapter)) != null) {
+            val mangaDirs = mangaDirectories.getOrPut(source.id) {
+                downloadManager.findSourceDir(source)?.listFiles() ?: emptyArray()
+            }
+
+            val mangaDirName = downloadManager.getMangaDirName(manga)
+            val mangaDir = mangaDirs.find { it.name == mangaDirName } ?: continue
+
+            val chapterDirs = chapterDirectories.getOrPut(manga.id!!) {
+                mangaDir.listFiles() ?: emptyArray()
+            }
+
+            val chapterDirName = downloadManager.getChapterDirName(chapter)
+            if (chapterDirs.any { it.name == chapterDirName }) {
                 chapter.status = Download.DOWNLOADED
             }
         }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsActivity.kt

@@ -78,6 +78,7 @@ class SettingsActivity : BaseActivity(),
     companion object {
         const val FLAG_THEME_CHANGED = 0x1
         const val FLAG_DATABASE_CLEARED = 0x2
+        const val FLAG_LANG_CHANGED = 0x4
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralFragment.kt

@@ -9,6 +9,7 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.util.LocaleHelper
 import eu.kanade.tachiyomi.util.plusAssign
 import eu.kanade.tachiyomi.widget.preference.IntListPreference
 import eu.kanade.tachiyomi.widget.preference.LibraryColumnsDialog
@@ -17,6 +18,7 @@ import net.xpece.android.support.preference.MultiSelectListPreference
 import rx.Observable
 import rx.android.schedulers.AndroidSchedulers
 import uy.kohesive.injekt.injectLazy
+import java.util.*
 
 class SettingsGeneralFragment : SettingsFragment(),
         PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback {
@@ -44,6 +46,8 @@ class SettingsGeneralFragment : SettingsFragment(),
 
     val categoryUpdate: MultiSelectListPreference by bindPref(R.string.pref_library_update_categories_key)
 
+    val langPreference: IntListPreference by bindPref(R.string.pref_language_key)
+
     override fun onViewCreated(view: View, savedState: Bundle?) {
         super.onViewCreated(view, savedState)
 
@@ -101,6 +105,15 @@ class SettingsGeneralFragment : SettingsFragment(),
             activity.recreate()
             true
         }
+
+        langPreference.setOnPreferenceChangeListener { preference, newValue ->
+            (activity as SettingsActivity).parentFlags = SettingsActivity.FLAG_LANG_CHANGED
+            LocaleHelper.setLocale(Locale(LocaleHelper.intToLangCode(newValue.toString().toInt())))
+            LocaleHelper.updateCfg(activity.application, activity.baseContext.resources.configuration)
+            activity.recreate()
+            true
+        }
+
     }
 
     override fun onPreferenceDisplayDialog(p0: PreferenceFragmentCompat?, p: Preference): Boolean {

app/src/main/java/eu/kanade/tachiyomi/util/ChapterSourceSync.kt

@@ -19,7 +19,7 @@ import java.util.*
 fun syncChaptersWithSource(db: DatabaseHelper,
                            sourceChapters: List<Chapter>,
                            manga: Manga,
-                           source: Source) : Pair<Int, Int> {
+                           source: Source) : Pair<List<Chapter>, List<Chapter>> {
 
     // Chapters from db.
     val dbChapters = db.getChapters(manga).executeAsBlocking()
@@ -44,22 +44,19 @@ fun syncChaptersWithSource(db: DatabaseHelper,
     // Chapters from the db not in the source.
     val toDelete = dbChapters.filterNot { it in sourceChapters }
 
-    // Amount of chapters added and deleted.
+    val readded = mutableListOf<Chapter>()
-    var added = 0
-    var deleted = 0
-
-    // Amount of chapters readded (different url but the same chapter number).
-    var readded = 0
 
     db.inTransaction {
+        val deletedChapterNumbers = TreeSet<Float>()
         val deletedReadChapterNumbers = TreeSet<Float>()
         if (!toDelete.isEmpty()) {
             for (c in toDelete) {
                 if (c.read) {
                     deletedReadChapterNumbers.add(c.chapter_number)
                 }
+                deletedChapterNumbers.add(c.chapter_number)
             }
-            deleted = db.deleteChapters(toDelete).executeAsBlocking().results().size
+            db.deleteChapters(toDelete).executeAsBlocking()
         }
 
         if (!toAdd.isEmpty()) {
@@ -73,14 +70,16 @@ fun syncChaptersWithSource(db: DatabaseHelper,
                 // Try to mark already read chapters as read when the source deletes them
                 if (c.isRecognizedNumber && c.chapter_number in deletedReadChapterNumbers) {
                     c.read = true
-                    readded++
+                }
+                if (c.isRecognizedNumber && c.chapter_number in deletedChapterNumbers) {
+                    readded.add(c)
                 }
             }
-            added = db.insertChapters(toAdd).executeAsBlocking().numberOfInserts()
+            db.insertChapters(toAdd).executeAsBlocking()
         }
 
         // Fix order in source.
         db.fixChaptersSourceOrder(sourceChapters).executeAsBlocking()
     }
-    return Pair(added - readded, deleted - readded)
+    return Pair(toAdd.subtract(readded).toList(), toDelete.subtract(readded).toList())
 }

app/src/main/java/eu/kanade/tachiyomi/util/LocaleHelper.kt

@@ -0,0 +1,47 @@
+package eu.kanade.tachiyomi.util
+
+import android.app.Application
+import android.content.res.Configuration
+import android.os.Build
+import android.view.ContextThemeWrapper
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import uy.kohesive.injekt.injectLazy
+import java.util.Locale
+
+object LocaleHelper {
+
+    private val preferences: PreferencesHelper by injectLazy()
+
+    private var pLocale = Locale(intToLangCode(preferences.lang()))
+
+    fun setLocale(locale: Locale) {
+        pLocale = locale
+        Locale.setDefault(pLocale)
+    }
+
+    fun updateCfg(wrapper: ContextThemeWrapper) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            val config = Configuration()
+            config.setLocale(pLocale)
+            wrapper.applyOverrideConfiguration(config)
+        }
+    }
+
+    fun updateCfg(app: Application, config: Configuration) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            config.locale = pLocale
+            app.baseContext.resources.updateConfiguration(config, app.baseContext.resources.displayMetrics)
+        }
+    }
+
+    fun intToLangCode(i: Int): String {
+        return when(i) {
+            1 -> "en"
+            2 -> "es"
+            3 -> "it"
+            4 -> "pt"
+            else -> "" // System Language
+        }
+    }
+
+}

app/src/main/java/eu/kanade/tachiyomi/util/RxExtensions.kt

@@ -1,8 +1,13 @@
 package eu.kanade.tachiyomi.util
 
+import rx.Observable
 import rx.Subscription
 import rx.subscriptions.CompositeSubscription
 
 fun Subscription?.isNullOrUnsubscribed() = this == null || isUnsubscribed
 
-operator fun CompositeSubscription.plusAssign(subscription: Subscription) = add(subscription)
+operator fun CompositeSubscription.plusAssign(subscription: Subscription) = add(subscription)
+
+fun <T, U, R> Observable<T>.combineLatest(o2: Observable<U>, combineFn: (T, U) -> R): Observable<R> {
+    return Observable.combineLatest(this, o2, combineFn)
+}

app/src/main/java/eu/kanade/tachiyomi/widget/ExtendedNavigationView.kt

@@ -0,0 +1,363 @@
+package eu.kanade.tachiyomi.widget
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.drawable.Drawable
+import android.support.annotation.CallSuper
+import android.support.design.R
+import android.support.design.internal.ScrimInsetsFrameLayout
+import android.support.graphics.drawable.VectorDrawableCompat
+import android.support.v4.content.ContextCompat
+import android.support.v4.view.ViewCompat
+import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
+import android.support.v7.widget.TintTypedArray
+import android.util.AttributeSet
+import android.view.View
+import android.view.ViewGroup
+import android.widget.CheckBox
+import android.widget.CheckedTextView
+import android.widget.RadioButton
+import android.widget.TextView
+import eu.kanade.tachiyomi.util.getResourceColor
+import eu.kanade.tachiyomi.util.inflate
+import eu.kanade.tachiyomi.R as TR
+
+/**
+ * An alternative implementation of [android.support.design.widget.NavigationView], without menu
+ * inflation and allowing customizable items (multiple selections, custom views, etc).
+ */
+@Suppress("LeakingThis")
+@SuppressLint("PrivateResource")
+open class ExtendedNavigationView @JvmOverloads constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0)
+: ScrimInsetsFrameLayout(context, attrs, defStyleAttr) {
+
+    /**
+     * Max width of the navigation view.
+     */
+    private var maxWidth: Int
+
+    /**
+     * Recycler view containing all the items.
+     */
+    protected val recycler = RecyclerView(context)
+
+    init {
+        // Custom attributes
+        val a = TintTypedArray.obtainStyledAttributes(context, attrs,
+                R.styleable.NavigationView, defStyleAttr,
+                R.style.Widget_Design_NavigationView)
+
+        ViewCompat.setBackground(
+                this, a.getDrawable(R.styleable.NavigationView_android_background))
+
+        if (a.hasValue(R.styleable.NavigationView_elevation)) {
+            ViewCompat.setElevation(this, a.getDimensionPixelSize(
+                    R.styleable.NavigationView_elevation, 0).toFloat())
+        }
+
+        ViewCompat.setFitsSystemWindows(this,
+                a.getBoolean(R.styleable.NavigationView_android_fitsSystemWindows, false))
+
+        maxWidth = a.getDimensionPixelSize(R.styleable.NavigationView_android_maxWidth, 0)
+
+        a.recycle()
+
+        recycler.layoutManager = LinearLayoutManager(context)
+        addView(recycler)
+    }
+
+    /**
+     * Overriden to measure the width of the navigation view.
+     */
+    override fun onMeasure(widthSpec: Int, heightSpec: Int) {
+        val width = when (MeasureSpec.getMode(widthSpec)) {
+            MeasureSpec.AT_MOST -> MeasureSpec.makeMeasureSpec(
+                    Math.min(MeasureSpec.getSize(widthSpec), maxWidth), MeasureSpec.EXACTLY)
+            MeasureSpec.UNSPECIFIED -> MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.EXACTLY)
+            else -> widthSpec
+        }
+        // Let super sort out the height
+        super.onMeasure(width, heightSpec)
+    }
+
+    /**
+     * Every item of the nav view. Generic items must belong to this list, custom items could be
+     * implemented by an abstract class. If more customization is needed in the future, this can be
+     * changed to an interface instead of sealed class.
+     */
+    sealed class Item {
+        /**
+         * A view separator.
+         */
+        class Separator(val paddingTop: Int = 0, val paddingBottom: Int = 0) : Item()
+
+        /**
+         * A header with a title.
+         */
+        class Header(val resTitle: Int) : Item()
+
+        /**
+         * A checkbox.
+         */
+        open class Checkbox(val resTitle: Int, var checked: Boolean = false) : Item()
+
+        /**
+         * A checkbox belonging to a group. The group must handle selections and restrictions.
+         */
+        class CheckboxGroup(resTitle: Int, override val group: Group, checked: Boolean = false)
+            : Checkbox(resTitle, checked), GroupedItem
+
+        /**
+         * A radio belonging to a group (a sole radio makes no sense). The group must handle
+         * selections and restrictions.
+         */
+        class Radio(val resTitle: Int, override val group: Group, var checked: Boolean = false)
+            : Item(), GroupedItem
+
+        /**
+         * An item with which needs more than two states (selected/deselected).
+         */
+        abstract class MultiState(val resTitle: Int, var state: Int = 0) : Item() {
+
+            /**
+             * Returns the drawable associated to every possible each state.
+             */
+            abstract fun getStateDrawable(context: Context): Drawable?
+
+            /**
+             * Creates a vector tinted with the accent color.
+             *
+             * @param context any context.
+             * @param resId the vector resource to load and tint
+             */
+            fun tintVector(context: Context, resId: Int): Drawable {
+                return VectorDrawableCompat.create(context.resources, resId, context.theme)!!.apply {
+                    setTint(context.theme.getResourceColor(TR.attr.colorAccent))
+                }
+            }
+        }
+
+        /**
+         * An item with which needs more than two states (selected/deselected) belonging to a group.
+         * The group must handle selections and restrictions.
+         */
+        abstract class MultiStateGroup(resTitle: Int, override val group: Group, state: Int = 0)
+            : MultiState(resTitle, state), GroupedItem
+
+        /**
+         * A multistate item for sorting lists (unselected, ascending, descending).
+         */
+        class MultiSort(resId: Int, group: Group) : MultiStateGroup(resId, group) {
+
+            companion object {
+                const val SORT_NONE = 0
+                const val SORT_ASC = 1
+                const val SORT_DESC = 2
+            }
+
+            override fun getStateDrawable(context: Context): Drawable? {
+                return when (state) {
+                    SORT_ASC -> tintVector(context, TR.drawable.ic_keyboard_arrow_up_black_32dp)
+                    SORT_DESC -> tintVector(context, TR.drawable.ic_keyboard_arrow_down_black_32dp)
+                    SORT_NONE -> ContextCompat.getDrawable(context, TR.drawable.empty_drawable_32dp)
+                    else -> null
+                }
+            }
+
+        }
+    }
+
+    /**
+     * Interface for an item belonging to a group.
+     */
+    interface GroupedItem {
+        val group: Group
+    }
+
+    /**
+     * A group containing a list of items.
+     */
+    interface Group {
+
+        /**
+         * An optional header for the group, typically a [Item.Header].
+         */
+        val header: Item?
+
+        /**
+         * An optional footer for the group, typically a [Item.Separator].
+         */
+        val footer: Item?
+
+        /**
+         * The items of the group, excluding header and footer.
+         */
+        val items: List<Item>
+
+        /**
+         * Creates all the elements of this group. Implementations can override this method for more
+         * customization.
+         */
+        fun createItems() = (mutableListOf<Item>() + header + items + footer).filterNotNull()
+
+        /**
+         * Called after creating the list of items. Implementations should load the current values
+         * into the models.
+         */
+        fun initModels()
+
+        /**
+         * Called when an item of this group is clicked. The group is responsible for all the
+         * selections of its items.
+         */
+        fun onItemClicked(item: Item)
+
+    }
+
+    /**
+     * Base view holder.
+     */
+    abstract class Holder(view: View) : RecyclerView.ViewHolder(view)
+
+    /**
+     * Separator view holder.
+     */
+    class SeparatorHolder(parent: ViewGroup)
+        : Holder(parent.inflate(R.layout.design_navigation_item_separator))
+
+    /**
+     * Header view holder.
+     */
+    class HeaderHolder(parent: ViewGroup)
+        : Holder(parent.inflate(R.layout.design_navigation_item_subheader))
+
+    /**
+     * Clickable view holder.
+     */
+    abstract class ClickableHolder(view: View, listener: View.OnClickListener?) : Holder(view) {
+        init {
+            itemView.setOnClickListener(listener)
+        }
+    }
+
+    /**
+     * Radio view holder.
+     */
+    class RadioHolder(parent: ViewGroup, listener: View.OnClickListener?)
+        : ClickableHolder(parent.inflate(TR.layout.navigation_view_radio), listener) {
+
+        val radio = itemView.findViewById(TR.id.nav_view_item) as RadioButton
+    }
+
+    /**
+     * Checkbox view holder.
+     */
+    class CheckboxHolder(parent: ViewGroup, listener: View.OnClickListener?)
+        : ClickableHolder(parent.inflate(TR.layout.navigation_view_checkbox), listener) {
+
+        val check = itemView.findViewById(TR.id.nav_view_item) as CheckBox
+    }
+
+    /**
+     * Multi state view holder.
+     */
+    class MultiStateHolder(parent: ViewGroup, listener: View.OnClickListener?)
+        : ClickableHolder(parent.inflate(TR.layout.navigation_view_checkedtext), listener) {
+
+        val text = itemView.findViewById(TR.id.nav_view_item) as CheckedTextView
+    }
+
+    /**
+     * Base adapter for the navigation view. It knows how to create and render every subclass of
+     * [Item].
+     */
+    abstract inner class Adapter(private val items: List<Item>) : RecyclerView.Adapter<Holder>() {
+
+        private val onClick = View.OnClickListener {
+            val pos = recycler.getChildAdapterPosition(it)
+            val item = items[pos]
+            onItemClicked(item)
+        }
+
+        fun notifyItemChanged(item: Item) {
+            val pos = items.indexOf(item)
+            if (pos != -1) notifyItemChanged(pos)
+        }
+
+        override fun getItemCount(): Int {
+            return items.size
+        }
+
+        @CallSuper
+        override fun getItemViewType(position: Int): Int {
+            val item = items[position]
+            return when (item) {
+                is Item.Header -> VIEW_TYPE_HEADER
+                is Item.Separator -> VIEW_TYPE_SEPARATOR
+                is Item.Radio -> VIEW_TYPE_RADIO
+                is Item.Checkbox -> VIEW_TYPE_CHECKBOX
+                is Item.MultiState -> VIEW_TYPE_MULTISTATE
+            }
+        }
+
+        @CallSuper
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): Holder {
+            return when (viewType) {
+                VIEW_TYPE_HEADER -> HeaderHolder(parent)
+                VIEW_TYPE_SEPARATOR -> SeparatorHolder(parent)
+                VIEW_TYPE_RADIO -> RadioHolder(parent, onClick)
+                VIEW_TYPE_CHECKBOX -> CheckboxHolder(parent, onClick)
+                VIEW_TYPE_MULTISTATE -> MultiStateHolder(parent, onClick)
+                else -> throw Exception("Unknown view type")
+            }
+        }
+
+        @CallSuper
+        override fun onBindViewHolder(holder: Holder, position: Int) {
+            when (holder) {
+                is HeaderHolder -> {
+                    val view = holder.itemView as TextView
+                    val item = items[position] as Item.Header
+                    view.setText(item.resTitle)
+                }
+                is SeparatorHolder -> {
+                    val view = holder.itemView
+                    val item = items[position] as Item.Separator
+                    view.setPadding(0, item.paddingTop, 0, item.paddingBottom)
+                }
+                is RadioHolder -> {
+                    val item = items[position] as Item.Radio
+                    holder.radio.setText(item.resTitle)
+                    holder.radio.isChecked = item.checked
+                }
+                is CheckboxHolder -> {
+                    val item = items[position] as Item.CheckboxGroup
+                    holder.check.setText(item.resTitle)
+                    holder.check.isChecked = item.checked
+                }
+                is MultiStateHolder -> {
+                    val item = items[position] as Item.MultiStateGroup
+                    val drawable = item.getStateDrawable(context)
+                    holder.text.setText(item.resTitle)
+                    holder.text.setCompoundDrawablesWithIntrinsicBounds(drawable, null, null, null)
+                }
+            }
+        }
+
+        abstract fun onItemClicked(item: Item)
+
+    }
+
+    companion object {
+        private const val VIEW_TYPE_HEADER = 100
+        private const val VIEW_TYPE_SEPARATOR = 101
+        private const val VIEW_TYPE_RADIO = 102
+        private const val VIEW_TYPE_CHECKBOX = 103
+        private const val VIEW_TYPE_MULTISTATE = 104
+    }
+
+}

app/src/main/res/drawable/empty_drawable_32dp.xml

@@ -0,0 +1,8 @@
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@android:color/transparent"/>
+    <size
+        android:width="32dp"
+        android:height="32dp" />
+</shape>

app/src/main/res/drawable/ic_keyboard_arrow_down_black_32dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="32dp"
+        android:height="32dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M7.41,7.84L12,12.42l4.59,-4.58L18,9.25l-6,6 -6,-6z"/>
+</vector>

app/src/main/res/drawable/ic_keyboard_arrow_up_black_32dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="32dp"
+        android:height="32dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M7.41,15.41L12,10.83l4.59,4.58L18,14l-6,-6 -6,6z"/>
+</vector>

app/src/main/res/drawable/ic_sort_white_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M3,18h6v-2L3,16v2zM3,6v2h18L21,6L3,6zM3,13h12v-2L3,11v2z"/>
+</vector>

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

@@ -57,7 +57,9 @@
             android:layout_gravity="bottom"
             android:gravity="center"
             android:background="?colorPrimary"
-            android:orientation="horizontal">
+            android:orientation="horizontal"
+            android:focusable="false"
+            android:descendantFocusability="blocksDescendants">
 
             <ImageButton
                 android:id="@+id/left_chapter"

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

@@ -1,53 +1,43 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout
-                xmlns:tools="http://schemas.android.com/tools"
+    xmlns:android="http://schemas.android.com/apk/res/android"
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
-                android:layout_width="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
-                android:layout_height="?android:attr/listPreferredItemHeightLarge"
+    android:layout_width="match_parent"
-                android:paddingTop="8dp"
+    android:layout_height="@dimen/material_component_lists_single_line_with_avatar_height"
-                android:paddingBottom="8dp"
+    android:background="?attr/selectable_list_drawable">
-                android:background="?attr/selectable_list_drawable"
+
-                >
     <ImageView
         android:id="@+id/image"
-        android:layout_width="50dp"
+        android:layout_width="@dimen/material_component_lists_single_line_with_avatar_height"
-        android:layout_height="50dp"
+        android:layout_height="@dimen/material_component_lists_single_line_with_avatar_height"
-        android:layout_alignParentLeft="true"
-        android:layout_alignParentStart="true"
-        android:layout_centerInParent="true"
         android:clickable="true"
-        android:layout_marginLeft="@dimen/margin_left"
+        android:paddingLeft="@dimen/material_component_lists_icon_left_padding"
-        android:layout_marginStart="@dimen/margin_left"
+        android:paddingStart="@dimen/material_component_lists_icon_left_padding"
-        android:layout_marginRight="@dimen/margin_right"
+        android:paddingRight="0dp"
-        android:layout_marginEnd="@dimen/margin_right"/>
+        android:paddingEnd="0dp"/>
-
-    <android.support.v7.widget.AppCompatImageView
-        android:id="@+id/reorder"
-        android:layout_width="50dp"
-        android:layout_height="50dp"
-        android:layout_marginLeft="@dimen/margin_left"
-        android:layout_marginStart="@dimen/margin_left"
-        android:layout_marginRight="@dimen/margin_right"
-        android:layout_marginEnd="@dimen/margin_right"
-        android:scaleType="center"
-        android:layout_centerInParent="true"
-        android:layout_alignParentRight="true"
-        android:layout_alignParentEnd="true"
-        app:srcCompat="@drawable/ic_reorder_grey_24dp"
-        android:tint="?android:attr/textColorPrimary"/>
 
     <TextView
         android:id="@+id/title"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_toRightOf="@id/image"
+        android:layout_marginLeft="@dimen/material_component_lists_text_left_padding"
-        android:layout_toEndOf="@id/image"
+        android:layout_marginStart="@dimen/material_component_lists_text_left_padding"
-        android:layout_toLeftOf="@id/reorder"
+        android:layout_marginRight="@dimen/material_component_lists_single_line_with_avatar_height"
-        android:layout_toStartOf="@id/reorder"
+        android:layout_marginEnd="@dimen/material_component_lists_single_line_with_avatar_height"
-        android:layout_centerInParent="true"
         android:ellipsize="end"
         android:maxLines="1"
+        android:layout_gravity="center_vertical"
         android:textAppearance="@style/TextAppearance.Regular.SubHeading"
         tools:text="Title"/>
 
-</RelativeLayout>
+    <ImageView
+        android:id="@+id/reorder"
+        android:layout_width="@dimen/material_component_lists_single_line_with_avatar_height"
+        android:layout_height="@dimen/material_component_lists_single_line_with_avatar_height"
+        android:scaleType="center"
+        android:layout_gravity="end"
+        app:srcCompat="@drawable/ic_reorder_grey_24dp"
+        android:tint="?android:attr/textColorPrimary"/>
+
+</FrameLayout>

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<eu.kanade.tachiyomi.ui.library.LibraryNavigationView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/nav_view2"
+    android:layout_width="wrap_content"
+    android:layout_height="match_parent"
+    android:layout_gravity="end"
+    android:fitsSystemWindows="false" />

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

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="?attr/listPreferredItemHeightSmall"
+    android:paddingLeft="?attr/listPreferredItemPaddingLeft"
+    android:paddingRight="?attr/listPreferredItemPaddingRight"
+    android:background="?attr/selectableItemBackground"
+    android:focusable="true">
+
+    <CheckBox
+        android:id="@+id/nav_view_item"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:paddingLeft="@dimen/material_component_lists_icon_left_padding"
+        android:background="@android:color/transparent"
+        android:gravity="center_vertical|start"
+        android:maxLines="1"
+        android:clickable="false"
+        android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
+
+</LinearLayout>

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

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="?attr/listPreferredItemHeightSmall"
+    android:paddingLeft="?attr/listPreferredItemPaddingLeft"
+    android:paddingRight="?attr/listPreferredItemPaddingRight"
+    android:background="?attr/selectableItemBackground"
+    android:focusable="true">
+
+    <CheckedTextView
+        android:id="@+id/nav_view_item"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:drawablePadding="@dimen/material_component_lists_icon_left_padding"
+        android:gravity="center_vertical|start"
+        android:maxLines="1"
+        android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
+
+</LinearLayout>

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

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="?attr/listPreferredItemHeightSmall"
+    android:paddingLeft="?attr/listPreferredItemPaddingLeft"
+    android:paddingRight="?attr/listPreferredItemPaddingRight"
+    android:background="?attr/selectableItemBackground"
+    android:focusable="true">
+
+    <RadioButton
+        android:id="@+id/nav_view_item"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:paddingLeft="@dimen/material_component_lists_icon_left_padding"
+        android:background="@android:color/transparent"
+        android:gravity="center_vertical|start"
+        android:maxLines="1"
+        android:clickable="false"
+        android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
+
+</LinearLayout>

app/src/main/res/menu/chapter_single.xml

@@ -6,6 +6,11 @@
           android:title="@string/action_download"
           android:visible="true" />
 
+    <item
+        android:id="@+id/action_delete"
+        android:title="@string/action_delete"
+        android:visible="false"/>
+
     <item android:id="@+id/action_bookmark"
           android:title="@string/action_bookmark"
           android:visible="true" />
@@ -14,10 +19,6 @@
           android:title="@string/action_remove_bookmark"
           android:visible="true" />
 
-    <item android:id="@+id/action_delete"
-          android:title="@string/action_delete"
-          android:visible="false" />
-
     <item android:id="@+id/action_mark_as_read"
           android:title="@string/action_mark_as_read" />
 

app/src/main/res/menu/library.xml

@@ -1,6 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+      xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
+      xmlns:tools="http://schemas.android.com/tools"
+      tools:context=".MainActivity">
 
     <item
         android:id="@+id/action_search"
@@ -13,36 +14,17 @@
         android:id="@+id/action_filter"
         android:icon="@drawable/ic_filter_list_white_24dp"
         android:title="@string/action_filter"
-        app:showAsAction="ifRoom">
+        app:showAsAction="ifRoom"/>
-        <menu>
-            <item
-                android:id="@+id/action_filter_downloaded"
-                android:checkable="true"
-                android:title="@string/action_filter_downloaded"/>
-            <item
-                android:id="@+id/action_filter_unread"
-                android:checkable="true"
-                android:title="@string/action_filter_unread"/>
-            <item
-                android:id="@+id/action_filter_empty"
-                android:title="@string/action_filter_empty"/>
-        </menu>
-    </item>
 
     <item
         android:id="@+id/action_update_library"
         android:icon="@drawable/ic_refresh_white_24dp"
         android:title="@string/action_update_library"
-        app:showAsAction="ifRoom" />
+        app:showAsAction="ifRoom"/>
-
-    <item
-        android:id="@+id/action_library_display_mode"
-        android:title="@string/action_display_mode"
-        app:showAsAction="never"/>
 
     <item
         android:id="@+id/action_edit_categories"
         android:title="@string/action_edit_categories"
-        app:showAsAction="never" />
+        app:showAsAction="never"/>
 
 </menu>

app/src/main/res/raw/changelog_release.xml

@@ -1,6 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <changelog bulletedList="true">
 
+    <changelogversion versionName="v0.4.1" changeDate="">
+        <changelogtext>Added an app's language selector.</changelogtext>
+
+        <changelogtext>Added options to sort the library and merged them with the filters.</changelogtext>
+
+        <changelogtext>Added an option to automatically download chapters.</changelogtext>
+
+        <changelogtext>Fixed performance issues when using a custom downloads directory, especially in the library updates tab.</changelogtext>
+
+        <changelogtext>Fixed gesture conflicts with the contextual menu and the webtoon reader.</changelogtext>
+
+        <changelogtext>Fixed wrong page direction when using volume keys for the right to left reader.</changelogtext>
+
+        <changelogtext>Fixed many crashes.</changelogtext>
+    </changelogversion>
+
     <changelogversion versionName="v0.4.0" changeDate="">
         <changelogtext>The download manager has been rewritten and it's possible some of your downloads
             aren't recognized anymore. It's recommended to manually delete everything and start over.

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

@@ -188,4 +188,20 @@
         <item>2</item>
     </string-array>
 
+    <string-array name="languages">
+        <item>@string/system_default</item>
+        <item>@string/english</item>
+        <item>@string/spanish</item>
+        <item>@string/italian</item>
+        <item>@string/portuguese</item>
+    </string-array>
+
+    <string-array name="languages_values">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+        <item>4</item>
+    </string-array>
+
 </resources>

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

@@ -21,6 +21,7 @@
     <string name="pref_theme_key">pref_theme_key</string>
     <string name="pref_library_update_restriction_key">library_update_restriction</string>
     <string name="pref_start_screen_key">start_screen</string>
+    <string name="pref_language_key">language</string>
 
     <string name="pref_default_viewer_key">pref_default_viewer_key</string>
     <string name="pref_image_scale_type_key">pref_image_scale_type_key</string>
@@ -41,6 +42,7 @@
     <string name="pref_read_with_tapping_key">reader_tap</string>
     <string name="pref_filter_downloaded_key">pref_filter_downloaded_key</string>
     <string name="pref_filter_unread_key">pref_filter_unread_key</string>
+    <string name="pref_library_sorting_mode_key">library_sorting_mode</string>
 
     <string name="pref_download_directory_key">download_directory</string>
     <string name="pref_download_slots_key">pref_download_slots_key</string>
@@ -64,6 +66,8 @@
     <string name="pref_display_catalogue_as_list">pref_display_catalogue_as_list</string>
     <string name="pref_last_catalogue_source_key">pref_last_catalogue_source_key</string>
 
+    <string name="pref_download_new_key">download_new</string>
+
     <!-- String Fonts -->
     <string name="font_roboto_medium">sans-serif</string>
     <string name="font_roboto_regular">sans-serif</string>

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

@@ -23,6 +23,9 @@
     <string name="action_filter_unread">Unread</string>
     <string name="action_filter_read">Read</string>
     <string name="action_filter_empty">Remove filter</string>
+    <string name="action_sort_alpha">Alphabetically</string>
+    <string name="action_sort_last_read">Last read</string>
+    <string name="action_sort_last_updated">Last updated</string>
     <string name="action_search">Search</string>
     <string name="action_select_all">Select all</string>
     <string name="action_mark_as_read">Mark as read</string>
@@ -57,6 +60,9 @@
     <string name="action_open_in_browser">Open in browser</string>
     <string name="action_add_to_home_screen">Add to home screen</string>
     <string name="action_display_mode">Change display mode</string>
+    <string name="action_display">Display</string>
+    <string name="action_display_grid">Grid</string>
+    <string name="action_display_list">List</string>
     <string name="action_set_filter">Set filter</string>
     <string name="action_cancel">Cancel</string>
     <string name="action_sort">Sort</string>
@@ -105,6 +111,14 @@
     <string name="light_theme">Main theme</string>
     <string name="dark_theme">Dark theme</string>
     <string name="pref_start_screen">Start screen</string>
+    <string name="pref_language">Language</string>
+
+      <!-- Languages -->
+    <string name="system_default">System Default</string>
+    <string name="english">English</string>
+    <string name="spanish">Spanish</string>
+    <string name="italian">Italian</string>
+    <string name="portuguese">Portuguese</string>
 
       <!-- Reader section -->
     <string name="pref_fullscreen">Fullscreen</string>
@@ -163,6 +177,7 @@
     <string name="third_to_last">Third to last chapter</string>
     <string name="fourth_to_last">Fourth to last chapter</string>
     <string name="fifth_to_last">Fifth to last chapter</string>
+    <string name="pref_download_new">Download new chapters</string>
 
       <!-- Sync section -->
     <string name="services">Services</string>
@@ -211,6 +226,9 @@
     <string name="select_source">Select a source</string>
     <string name="no_valid_sources">Please enable at least one valid source</string>
 
+    <!-- Manga activity -->
+    <string name="manga_not_in_db">This manga was removed from the database!</string>
+
     <!-- Manga info fragment -->
     <string name="manga_detail_tab">Info</string>
     <string name="description">Description</string>
@@ -293,6 +311,7 @@
     <string name="no_previous_chapter">Previous chapter not found</string>
     <string name="decode_image_error">Image could not be loaded.\nTry changing the image decoder or with one of the options below</string>
     <string name="confirm_update_manga_sync">Update last chapter read in enabled services to %1$d?</string>
+    <string name="confirm_set_image_as_cover">Do you want to set this image as the cover?</string>
     <string name="viewer_for_this_series">Viewer for this series</string>
 
     <!-- Backup fragment -->

app/src/main/res/xml/pref_downloads.xml

@@ -44,6 +44,15 @@
             android:summary="%s"
             android:title="@string/pref_remove_after_read" />
 
+        <PreferenceCategory
+            android:persistent="false"
+            android:title="@string/pref_download_new" />
+
+        <SwitchPreference
+            android:defaultValue="false"
+            android:key="@string/pref_download_new_key"
+            android:title="@string/pref_download_new"/>
+
     </PreferenceScreen>
 
 </PreferenceScreen>

app/src/main/res/xml/pref_general.xml

@@ -10,6 +10,14 @@
         android:title="@string/pref_category_general"
         app:asp_tintEnabled="true">
 
+        <eu.kanade.tachiyomi.widget.preference.IntListPreference
+            android:defaultValue="0"
+            android:entries="@array/languages"
+            android:entryValues="@array/languages_values"
+            android:key="@string/pref_language_key"
+            android:summary="%s"
+            android:title="@string/pref_language" />
+
         <eu.kanade.tachiyomi.widget.preference.IntListPreference
             android:defaultValue="1"
             android:entries="@array/themes"

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:2.2.3'
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.13.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files